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1

Beowawe Bottoming Binary Project Geothermal Project | Open Energy  

Open Energy Info (EERE)

Beowawe Bottoming Binary Project Geothermal Project Beowawe Bottoming Binary Project Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Beowawe Bottoming Binary Project Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Project Type / Topic 3 Low Temperature Resources Project Description The proposed two-year project supports the DOE GTP's goal of promoting the development and commercial application of energy production from low-temperature geothermal fluids, i.e., between 150°F and 300°F. State Nevada Objectives Demonstrate the technical and economic feasibility of electricity generation from nonconventional geothermal resources of 205°F using the first commercial use of a cycle at a geothermal power plant inlet temperature of less than 300°F.

2

Beowawe Binary Bottoming Cycle | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

generation from the nonconventional geothermal resources of 205F by extracting waste heat from the brine to power a binary power plant. lowmcdonaldbeowawebinarybottomingc...

3

Beowawe Bottoming Binary Unit - Final Technical Report for EE0002856  

SciTech Connect (OSTI)

This binary plant is the first high-output refrigeration based waste heat recovery cycle in the industry. Its working fluid is environmentally friendly and as such, the permits that would be required with a butane based cycle are not necessary. The unit is modularized, meaning that the units individual skids were assembled in another location and were shipped via truck to the plant site. This project proves the technical feasibility of using low temperature brine The development of the unit led to the realization of low temperature, high output, and environmentally friendly heat recovery systems through domestic research and engineering. The project generates additional renewable energy for Nevada, resulting in cleaner air and reduced carbon dioxide emissions. Royalty and tax payments to governmental agencies will increase, resulting in reduced financial pressure on local entities. The major components of the unit were sourced from American companies, resulting in increased economic activity throughout the country.

McDonald, Dale Edward

2013-02-12T23:59:59.000Z

4

Nevada's Beowawe Geothermal Plant Begins Generating Clean Energy...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Nevada's Beowawe Geothermal Plant Begins Generating Clean Energy Nevada's Beowawe Geothermal Plant Begins Generating Clean Energy April 20, 2011 - 1:45pm Addthis U.S. Energy...

5

Beowawe Geothermal Facility | Open Energy Information  

Open Energy Info (EERE)

Geothermal Facility Geothermal Facility Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Beowawe Geothermal Facility General Information Name Beowawe Geothermal Facility Facility Beowawe Sector Geothermal energy Location Information Location Beowawe, Nevada Coordinates 40.554765353152°, -116.61741614342° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.554765353152,"lon":-116.61741614342,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

6

Beowawe, Nevada: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Beowawe, Nevada: Energy Resources Beowawe, Nevada: Energy Resources Jump to: navigation, search Name Beowawe, Nevada Equivalent URI DBpedia GeoNames ID 5701442 Coordinates 40.5926922°, -116.4773071° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.5926922,"lon":-116.4773071,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

7

Beowawe Hot Springs Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Beowawe Hot Springs Geothermal Area Beowawe Hot Springs Geothermal Area (Redirected from Beowawe Hot Springs Area) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Beowawe Hot Springs Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Future Plans 5 Exploration History 6 Well Field Description 7 Research and Development Activities 8 Technical Problems and Solutions 9 Geology of the Area 10 Geofluid Geochemistry 11 NEPA-Related Analyses (0) 12 Exploration Activities (8) 13 References Map: Beowawe Hot Springs Geothermal Area Beowawe Hot Springs Geothermal Area Location Map Area Overview Geothermal Area Profile Location: Beowawe, Nevada Exploration Region: Central Nevada Seismic Zone GEA Development Phase: Operational"Operational" is not in the list of possible values (Phase I - Resource Procurement and Identification, Phase II - Resource Exploration and Confirmation, Phase III - Permitting and Initial Development, Phase IV - Resource Production and Power Plant Construction) for this property.

8

Beowawe Hot Springs Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Beowawe Hot Springs Geothermal Area Beowawe Hot Springs Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Beowawe Hot Springs Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Future Plans 5 Exploration History 6 Well Field Description 7 Research and Development Activities 8 Technical Problems and Solutions 9 Geology of the Area 10 Geofluid Geochemistry 11 NEPA-Related Analyses (0) 12 Exploration Activities (8) 13 References Map: Beowawe Hot Springs Geothermal Area Beowawe Hot Springs Geothermal Area Location Map Area Overview Geothermal Area Profile Location: Beowawe, Nevada Exploration Region: Central Nevada Seismic Zone GEA Development Phase: Operational"Operational" is not in the list of possible values (Phase I - Resource Procurement and Identification, Phase II - Resource Exploration and Confirmation, Phase III - Permitting and Initial Development, Phase IV - Resource Production and Power Plant Construction) for this property.

9

Magnetotellurics At Beowawe Hot Springs Area (Garg, Et Al., 2007...  

Open Energy Info (EERE)

Garg, Et Al., 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Magnetotellurics At Beowawe Hot Springs Area (Garg, Et Al., 2007) Exploration...

10

Dixie Valley Bottoming Binary Cycle | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

objective: Prove the technical and economic feasibility of utilizing the available unused heat to generate additional electric power from a binary power plant from low-temperature...

11

Water Sampling At Beowawe Hot Springs Area (Wood, 2002) | Open Energy  

Open Energy Info (EERE)

Water Sampling At Beowawe Hot Springs Area (Wood, Water Sampling At Beowawe Hot Springs Area (Wood, 2002) Exploration Activity Details Location Beowawe Hot Springs Area Exploration Technique Water Sampling Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the Dieng field in Central Java, Indonesia. We have analyzed the samples from

12

Compound and Elemental Analysis At Beowawe Hot Springs Area (Wood, 2002) |  

Open Energy Info (EERE)

Compound and Elemental Analysis At Beowawe Hot Compound and Elemental Analysis At Beowawe Hot Springs Area (Wood, 2002) Exploration Activity Details Location Beowawe Hot Springs Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: 1) the North Island of New Zealand (three sets of samples from three different years) and the South Island of New Zealand (1 set of samples); 2) the Cascades of Oregon; 3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; 4) the Dixie Valley and Beowawe fields in Nevada; 5) Palinpiiion, the Philippines; 6) the Salton Sea and Heber geothermal fields of southern California; and 7) the

13

Bottoms Up  

E-Print Network [OSTI]

Broadcast Transcript: "Bottoms up!" Or, "gan bei," as they say here in China. But what are you drinking? It could either be the authentic 144-proof sorghum-based liquor Moutai, or a clever counterfeit. Moutai has been ...

Hacker, Randi; Boyd, David

2011-03-30T23:59:59.000Z

14

FINAL TECHNICAL REPORT United States Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

TECHNICAL REPORT TECHNICAL REPORT United States Department of Energy Award # EE0002856 Project Title: Beowawe Bottoming Binary Unit Principal Investigator: o Dale McDonald Senior Engineering Manager (646) 829-3944 dmcdonald@terra-genpower.com Submitting Official: o Vitaly Lee Vice President, Business Management (646) 829-3955 vlee@tgpnvc.com Submission Date: 01/04/2013 DUNS Number: 967623120 Recipient:

15

CX-001564: Categorical Exclusion Determination | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

4: Categorical Exclusion Determination 4: Categorical Exclusion Determination CX-001564: Categorical Exclusion Determination Beowawe Bottoming Binary Project CX(s) Applied: A9, B5.1, B5.2 Date: 04/01/2010 Location(s): Nevada Office(s): Energy Efficiency and Renewable Energy, Golden Field Office Beowawe Power, Inc. (BPL) would install a 1.5 megawatt binary Organic Rankine Cycle (ORC) in the existing 16 megawatt Beowawe Geothermal Power Plant located in Northern Nevada that would utilize low temperature/pressure brine to produce additional power before being re-injected back into the geothermal reservoir. The ORC would use the tail-water from the existing power generation unit to allow for an additional use of the geothermal fluid prior to re-injection. There would be no additional use of geothermal resource fluid from the reservoir beyond

16

Bottom head assembly  

DOE Patents [OSTI]

A bottom head dome assembly is described which includes, in one embodiment, a bottom head dome and a liner configured to be positioned proximate the bottom head dome. The bottom head dome has a plurality of openings extending there through. The liner also has a plurality of openings extending there through, and each liner opening aligns with a respective bottom head dome opening. A seal is formed, such as by welding, between the liner and the bottom head dome to resist entry of water between the liner and the bottom head dome at the edge of the liner. In the one embodiment, a plurality of stub tubes are secured to the liner. Each stub tube has a bore extending there through, and each stub tube bore is coaxially aligned with a respective liner opening. A seat portion is formed by each liner opening for receiving a portion of the respective stub tube. The assembly also includes a plurality of support shims positioned between the bottom head dome and the liner for supporting the liner. In one embodiment, each support shim includes a support stub having a bore there through, and each support stub bore aligns with a respective bottom head dome opening. 2 figs.

Fife, A.B.

1998-09-01T23:59:59.000Z

17

Laser bottom hole assembly  

DOE Patents [OSTI]

There is provided for laser bottom hole assembly for providing a high power laser beam having greater than 5 kW of power for a laser mechanical drilling process to advance a borehole. This assembly utilizes a reverse Moineau motor type power section and provides a self-regulating system that addresses fluid flows relating to motive force, cooling and removal of cuttings.

Underwood, Lance D; Norton, Ryan J; McKay, Ryan P; Mesnard, David R; Fraze, Jason D; Zediker, Mark S; Faircloth, Brian O

2014-01-14T23:59:59.000Z

18

Detonation: From the Bottom Up  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Latest Issue:December 2014 All Issues submit Detonation: From the Bottom Up In the nuclear testing era, scientists never thoroughly characterized the properties of the...

19

Composite attachment: the Trek bottom bracket  

E-Print Network [OSTI]

Bottom bracket failures have been one of the most common failures in the composite bicycle frames produced by the Trek Bicycle Corporation. The bottom bracket is the portion of the frame that supports the crank and pedals. An aluminum insert...

Mallard, David

2013-02-22T23:59:59.000Z

20

Dense Bottom Currents in Rotating Ocean  

Science Journals Connector (OSTI)

A dense bottom current is the flow created by a source of mass, momentum, and buoyancy flowing into an ambient fluid in such a way that the flow is bounded by the fixed wall and the interface. The dense bottom...

Flemming Bo Pedersen

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Life on the Bottom of a Stream  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

on the Bottom of a Stream on the Bottom of a Stream Nature Bulletin No. 690 October 20, 1962 Forest Preserve District of Cook County Seymour Simon, President David H. Thompson, Senior Naturalist LIFE ON THE BOTTOM OF A STREAM A stream conceals a teeming world of bottom-dwelling animals that are the food supply for all stream fish and a source of live bait for catching them. Raccoons, mink, muskrats, ducks, shore birds, turtles and frogs hunt here for mussels, snails, crayfish and aquatic insects. These insects, after passing their young stages on the stream bottom, emerge as swarms of flying adults devoured by dozens of kinds of song birds. These, too, are the insects that fly fishermen imitate in making their artificial lures. Streams of all sizes have about the same kinds of bottom animals, whether a brook small enough to be stepped across or the mile-wide Mississippi. The greatest differences are found when the populations from different types of bottom are compared -- rock, gravel, sand and mud. These main types result from the sorting action of the water, especially during floods. Rock bottom is found in the fastest water because all smaller materials are swept downstream. As the current becomes slower the gravel, then the sand, and finally the mud, settle out.

22

Pipeline bottoming cycle study. Final report  

SciTech Connect (OSTI)

The technical and economic feasibility of applying bottoming cycles to the prime movers that drive the compressors of natural gas pipelines was studied. These bottoming cycles convert some of the waste heat from the exhaust gas of the prime movers into shaft power and conserve gas. Three typical compressor station sites were selected, each on a different pipeline. Although the prime movers were different, they were similar enough in exhaust gas flow rate and temperature that a single bottoming cycle system could be designed, with some modifications, for all three sites. Preliminary design included selection of the bottoming cycle working fluid, optimization of the cycle, and design of the components, such as turbine, vapor generator and condensers. Installation drawings were made and hardware and installation costs were estimated. The results of the economic assessment of retrofitting bottoming cycle systems on the three selected sites indicated that profitability was strongly dependent upon the site-specific installation costs, how the energy was used and the yearly utilization of the apparatus. The study indicated that the bottoming cycles are a competitive investment alternative for certain applications for the pipeline industry. Bottoming cycles are technically feasible. It was concluded that proper design and operating practices would reduce the environmental and safety hazards to acceptable levels. The amount of gas that could be saved through the year 2000 by the adoption of bottoming cycles for two different supply projections was estimated as from 0.296 trillion ft/sup 3/ for a low supply projection to 0.734 trillion ft/sup 3/ for a high supply projection. The potential market for bottoming cycle equipment for the two supply projections varied from 170 to 500 units of varying size. Finally, a demonstration program plan was developed.

Not Available

1980-06-01T23:59:59.000Z

23

A Computational Strategy to Analyze Label-Free Temporal Bottom...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Computational Strategy to Analyze Label-Free Temporal Bottom-up Proteomics Data. A Computational Strategy to Analyze Label-Free Temporal Bottom-up Proteomics Data. Abstract:...

24

Physics of Binary Information  

E-Print Network [OSTI]

Basic concepts of theoretical particle physics, including quantum mechanics and Poincar\\'e invariance, the leptonic mass spectrum and the proton mass, can be derived, without reference to first principles, from intrinsic properties of the simplest elements of information represented by binary data. What we comprehend as physical reality is, therefore, a reflection of mathematically determined logical structures, built from elements of binary data.

Walter Smilga

2005-05-05T23:59:59.000Z

25

Very Cool Close Binaries  

E-Print Network [OSTI]

We present new observations of cool <6000K and low mass <1Msun binary systems that have been discovered by searching several modern stellar photometric databases. The search has led to a factor of 10 increase in the number of known cool close eclipsing binary systems.

J. Scott Shaw; Mercedes Lopez-Morales

2006-03-28T23:59:59.000Z

26

Gamma-ray binaries  

E-Print Network [OSTI]

Recent observations have shown that some compact stellar binaries radiate the highest energy light in the universe. The challenge has been to determine the nature of the compact object and whether the very high energy gamma-rays are ultimately powered by pulsar winds or relativistic jets. Multiwavelength observations have shown that one of the three gamma-ray binaries known so far, PSR B1259-63, is a neutron star binary and that the very energetic gamma-rays from this source and from another gamma-ray binary, LS I +61 303, may be produced by the interaction of pulsar winds with the wind from the companion star. At this time it is an open question whether the third gamma-ray binary, LS 5039, is also powered by a pulsar wind or a microquasar jet, where relativistic particles in collimated jets would boost the energy of the wind from the stellar companion to TeV energies.

I. F. Mirabel

2006-10-24T23:59:59.000Z

27

Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons with 9.3 fb-1  

E-Print Network [OSTI]

note 10726 Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom measurements of direct CP­violating asymmetries in charmless decays of neutral bottom hadrons to pairs corresponding to 9.3 fb-1 of integrated luminosity, we measure the direct CP violation in bottom strange mesons

Fermilab

28

Spectroscopy and decays of charm and bottom  

SciTech Connect (OSTI)

After a brief review of the quark model, we discuss our present knowledge of the spectroscopy of charm and bottom mesons and baryons. We go on to review the lifetimes, semileptonic, and purely leptonic decays of these particles. We conclude with a brief discussion B and D mixing and rare decays.

Butler, J.N.

1997-10-01T23:59:59.000Z

29

The Bottom Line Space@Penn Upgrade  

E-Print Network [OSTI]

The Bottom Line Space@Penn Upgrade Coming Soon! A project is underway to upgrade the current that allows designated users in the field to update certain elements of their space. This project, whose: Grants & Projects ­ Used for invoice generation, overhead and revenue recognition, and award and project

Sharp, Kim

30

Bottom: The PNNL-developed Grid Friendly  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Bottom: The PNNL-developed Grid Bottom: The PNNL-developed Grid Friendly (tm) Appliance Controller was successfully tested in clothes dryers and water heaters in Washington and Oregon during a 2007 demonstration project. The controller senses stress on the electric grid and automatically and instantaneously responds to reduce the demand for electricity from appliances, such as turning off the heating element in a dryer for a few minutes. When applied in concert across multiple appliances in multiple households, this temporary drop in energy demand could give grid operators the cushion they need to balance the system. The Grid-Friendly Appliance Controller won a prestigious R&D 100 Award in 2008. Top: Researchers draw upon historic expertise and use modern instrumen- tation to develop new methods for

31

Hypervelocity binary stars: smoking gun of massive binary black holes  

E-Print Network [OSTI]

The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole. In this paper, we demonstrate that binary stars can be ejected out of the Galactic center with velocities up to 10^3 km/s, while preserving their integrity, through interactions with a massive binary black hole. Binary stars are unlikely to attain such high velocities via scattering by a single massive black hole or through any other mechanisms. Based on the above theoretical prediction, we propose a search for binary systems among the hypervelocity stars. Discovery of hypervelocity binary stars, even one, is a definitive evidence of the existence of a massive binary black hole in the Galactic center.

Youjun Lu; Qingjuan Yu; D. N. C. Lin

2007-07-12T23:59:59.000Z

32

On the generation of bottom-trapped internal tides  

Science Journals Connector (OSTI)

The interaction of the barotropic tide with the bottom topography when the tidal frequency ? is smaller than the Coriolis frequency f is examined. The resulting waves are called bottom-trapped internal tides. The energy density associated with ...

Saeed Falahat; Jonas Nycander

33

Updated Web Tool Focuses on Bottom Line for Distributed Wind...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Updated Web Tool Focuses on Bottom Line for Distributed Wind Turbines Updated Web Tool Focuses on Bottom Line for Distributed Wind Turbines January 10, 2013 - 2:43pm Addthis This...

34

Dixie Valley Bottoming Binary Plant: Terra-Gen was funded by...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Northwest National Laboratory Developing a new type of biphasic working fluid for subcritical geothermal systems that utilizes microporous metal-organic solids as the primary...

35

Rankine bottoming cycle safety analysis. Final report  

SciTech Connect (OSTI)

Vector Engineering Inc. conducted a safety and hazards analysis of three Rankine Bottoming Cycle Systems in public utility applications: a Thermo Electron system using Fluorinal-85 (a mixture of 85 mole % trifluoroethanol and 15 mole % water) as the working fluid; a Sundstrand system using toluene as the working fluid; and a Mechanical Technology system using steam and Freon-II as the working fluids. The properties of the working fluids considered are flammability, toxicity, and degradation, and the risks to both plant workers and the community at large are analyzed.

Lewandowski, G.A.

1980-02-01T23:59:59.000Z

36

X-ray binaries  

E-Print Network [OSTI]

We review the nuclear astrophysics aspects of accreting neutron stars in X-ray binaries. We summarize open astrophysical questions in light of recent observations and their relation to the underlying nuclear physics. Recent progress in the understanding of the nuclear physics, especially of X-ray bursts, is also discussed.

H. Schatz; K. E. Rehm

2006-08-01T23:59:59.000Z

37

Charmed bottom baryon spectroscopy from lattice QCD  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

We calculate the masses of baryons containing one, two, or three heavy quarks using lattice QCD. We consider all possible combinations of charm and bottom quarks, and compute a total of 36 different states with JP = 1/2+ and JP = 3/2+. We use domain-wall fermions for the up, down, and strange quarks, a relativistic heavy-quark action for the charm quarks, and nonrelativistic QCD for the bottom quarks. Our analysis includes results from two different lattice spacings and seven different pion masses. We perform extrapolations of the baryon masses to the continuum limit and to the physical pion mass using SU(4|2) heavy-hadron chiral perturbation theory including 1/mQ and finite-volume effects. For the 14 singly heavy baryons that have already been observed, our results agree with the experimental values within the uncertainties. We compare our predictions for the hitherto unobserved states with other lattice calculations and quark-model studies.

Brown, Zachary S.; Detmold, William; Meinel, Stefan; Orginos, Kostas

2014-11-01T23:59:59.000Z

38

Technological features and operating modes of bottom turbines  

Science Journals Connector (OSTI)

Technological features and the startup and operation modes of a power unit consisting of an R-type turbine and a bottom turbine connected to it are considered.

L. S. Ioffe

2010-09-01T23:59:59.000Z

39

Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm  

E-Print Network [OSTI]

#12;Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2004............................................................................................................... 13 2.3. Test fishing.................................................................................................................................. 17 3.1. Fish observed

40

The Bottom-Up Approach forThermoelectric Nanocomposites, plus?  

Broader source: Energy.gov [DOE]

Contains an overview of the synthetic strategies for preparing bulk nanocomposite TE materials using a two-step bottom-up approach and associated experimental and theoretical results.

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Energy of tsunami waves generated by bottom motion  

E-Print Network [OSTI]

Energy of tsunami waves generated by bottom motion By Denys Dutykh, Fr´ed´eric Dias CMLA, ENS investigation on the energy of waves generated by bottom motion is performed here. We start with the full for the linearized water wave equations. Exchanges between potential and kinetic energies are clearly revealed

Boyer, Edmond

42

Nanowires As Building Blocks for Bottom-Up Nanotechnology  

E-Print Network [OSTI]

#12;Nanowires As Building Blocks for Bottom-Up Nanotechnology The field of nanotechnology/or combinations of function in an integrated nanosystem. To enable this bottom-up approach for nanotechnology-dimensional (1D) nanostruc- tures at the forefront of nanoscience and nanotechnology. NWs and NBs are typi- cally

Wang, Zhong L.

43

Locating Restricted Facilities on Binary Maps  

E-Print Network [OSTI]

welfare optimization, when the area map is encoded as a binary (0,1) mxn matrix. ... of connected components in binary maps and in Section 7 we conclude.

Mugurel

2008-09-20T23:59:59.000Z

44

Hyperbolic capture of compact binaries  

E-Print Network [OSTI]

Hyperbolic encounters of compact objects are common interactions in dense environments. During this process a significant amount of gravitational radiation is emitted depending on the parameters of the system. Here we give a parametric description of the radial motion valid for general binary orbits and the radiative energy and angular momentum losses for binaries with spinning components.

Mtys Vasth

2014-09-23T23:59:59.000Z

45

Evolutionary Memory in Binary Systems?  

E-Print Network [OSTI]

Correlation between the spins (rotational velocities) in binaries has previously been established. We now continue and show that the degree of spin correlation is independent of the components' separation. Such a result might be related for example to Zhang's non-linear model for the formation of binary stars from a nebula.

Netzach Farbiash; Raphael Steinitz

2004-12-08T23:59:59.000Z

46

Audio Binary Halftone Watermarking Algorithm  

Science Journals Connector (OSTI)

Conventional audio watermarking method has the following deficiencies: the embedded watermarking signal bits are too less; the image watermarking pre-process is too simple which reduce the security; the embedded audio watermarking is meaningless binary sequence. To address these problems, we propose a robust audio watermarking algorithm based on audio binary halftone pre-process. The meaningful audio watermarking can be preprocessed to high-fidelity binary audio. The variable dimension operation is used to scramble the host audio. Experiments show the proposed algorithm has big embedding quantity, high security, strong practicability and robustness in enduring common attacks.

Huan Li; Zheng Qin; Xuanping Zhang; Xu Wang

2011-01-01T23:59:59.000Z

47

Bottom steam turbines of the Ural Turbine Works  

Science Journals Connector (OSTI)

Basic design features, thermal schemes, and economic indicators of some bottom turbines that have been developed, as well as ... that have partially been manufactured at the Ural Turbine Works, are presented.

G. D. Barinberg; A. E. Valamin; Yu. A. Sakhnin

2008-08-01T23:59:59.000Z

48

Hygienic rating of hydrocarbons in bottom deposits of water ecosystems  

Science Journals Connector (OSTI)

The authors of this article draw the readers attention to the topical problem of the contamination of bottom deposits of water ecosystems by hydrocarbons, such as oil and gas condensate,...

Rauf Valievich Galiulin

2014-05-01T23:59:59.000Z

49

Bell-Bottoms and Energy Efficient Buildings | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Bell-Bottoms and Energy Efficient Buildings Bell-Bottoms and Energy Efficient Buildings Bell-Bottoms and Energy Efficient Buildings January 18, 2011 - 5:19pm Addthis Roland Risser Roland Risser Program Director, Building Technologies Office This is hard to admit via blog, but I must come clean. I have fallen victim to some now seemingly ridiculous trends during my life. A few of them include wearing bell-bottoms in the 70s, sporting a "Members Only" jacket in the 80s, and rocking Ray-Bans and Maui Jims in the 90s (well, technically I still wear Maui Jims). What was I thinking? This tri-fecta of bad fashion and wrong choices makes me wonder... What characteristic makes an idea or product so exceptional that people value it? What causes the popularity explosion of a YouTube video or the national obsession with a bed bug outbreak?

50

Ultraviolet studies of interacting binaries  

E-Print Network [OSTI]

Interacting Binaries consist of a variety of stellar objects in different stages of evolution and those containing accreting compact objects still represent a major challenge to our understanding of not only close binary evolution but also of the chemical evolution of the Galaxy. These end-points of binary star evolution are ideal laboratories for the study of accretion and outflow processes, and provide insight on matter under extreme physical conditions. One of the key-questions of fundamental relevance is the nature of SNIa progenitors. The study of accreting compact binary systems relies on observations over the entire electromagnetic spectrum and we outline here those unresolved questions for which access to the ultraviolet range is vital, as they cannot be addressed by observations in any other spectral region.

B. T. Gaensicke; D. de Martino; T. R. Marsh; C. A. Haswell; C. Knigge; K. S. Long; S. N. Shore

2005-10-04T23:59:59.000Z

51

Charm and bottom hadronic form factors with QCD sum rules  

SciTech Connect (OSTI)

We present a brief review of some calculations of form factors and coupling constants in vertices with charm and bottom mesons in the framework of QCD sum rules. We first discuss the motivation for this work, describing possible applications of these form factors to charm and bottom decays processes. We first make a summarize of the QCD sum rules method. We give special attention to the uncertainties of the method introducing by the intrinsic variation of the parameters. Finally we conclude.

Bracco, M. E. [Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Rod. Presidente Dutra Km 298, Polo Industrial, 27537-000, Resende, RJ (Brazil); Rodrigues, B. O.; Cerqueira, A. Jr. [Instituto de Fisica, Universidade do Estado do Rio de Janeiro, Rua Sao Francisco Xavier 524, 20550-900, Rio de Janeiro, RJ (Brazil)

2013-03-25T23:59:59.000Z

52

Carbon transport in the bottom boundary layer. Final report  

SciTech Connect (OSTI)

This report summarizes the activities and findings from a field experiment devised to estimate the rates and mechanisms of transport of carbon across the continental shelves. The specific site chosen for the experiment was the mid-Atlantic Bight, a region off the North Carolina coast. The experiment involved a large contingent of scientists from many institutions. The specific component of the program was the transport of carbon in the bottom boundary layer. The postulate mechanisms of transport of carbon in the bottom boundary layer are: resuspension and advection, downward deposition, and accumulation. The high turbulence levels in the bottom boundary layer require the understanding of the coupling between turbulence and bottom sediments. The specific issues addressed in the work reported here were: (a) What is the sediment response to forcing by currents and waves? (b) What is the turbulence climate in the bottom boundary layer at this site? and (c) What is the rate at which settling leads to carbon sequestering in bottom sediments at offshore sites?

Agrawal, Y.C.

1998-10-05T23:59:59.000Z

53

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators. Binary cycle power plants are closed-loop systems and virtually nothing

54

Categorical Exclusion Determinations: B5.1 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

1, 2010 1, 2010 CX-001400: Categorical Exclusion Determination Nye County Energy Efficiency Projects CX(s) Applied: A9, A11, B5.1 Date: 04/01/2010 Location(s): Nye County, Nevada Office(s): Energy Efficiency and Renewable Energy April 1, 2010 CX-001567: Categorical Exclusion Determination Lehigh County (Pennsylvania), Geothermal Trexler Environmental Center - American Recovery and Reinvestment Act - Energy Efficiency and Conservation Block Grant (S) CX(s) Applied: B5.1 Date: 04/01/2010 Location(s): Lehigh County, Pennsylvania Office(s): Energy Efficiency and Renewable Energy, Golden Field Office April 1, 2010 CX-001564: Categorical Exclusion Determination Beowawe Bottoming Binary Project CX(s) Applied: A9, B5.1, B5.2 Date: 04/01/2010 Location(s): Nevada Office(s): Energy Efficiency and Renewable Energy, Golden Field Office

55

MHK Technologies/Under Bottom Wave Generator | Open Energy Information  

Open Energy Info (EERE)

Under Bottom Wave Generator Under Bottom Wave Generator < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Under Bottom Wave Generator.jpg Technology Profile Primary Organization Glen Edward Cook Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description Water will flow up into the pipe from the down stroke and out of the pipe back into the ocean on the up stroke Waves rolling by will push water into the pipe This will mock the ocean swell A propellar is mounted inside the lower portion of the pipe the upward and downward flow of water will spin the propellar in both direcitons The propellar is connected to a generator

56

Light Higgses and Dark Matter at Bottom and Charm Factories  

E-Print Network [OSTI]

Neither Dark Matter nor scalar particles in the Higgs sector are ruled out at energies accessible to bottom and charm factories. In Dark Matter searches, the error on the mass of Dark Matter is $\\sim 4$ GeV in the best LHC studies. For light Dark Matter this could represent a 100% (or more) error. In Higgs searches, the presence of a light singlet Higgs can make the LHC Higgs search difficult, if not impossible. If Dark Matter or a Higgs scalar is light, it will {\\it require} a low-energy machine to precisely determine the couplings. We review the models, modes of discovery and rate expectations for these new particle searches at bottom and charm factories. We also discuss the options for new runs at bottom and charm factories relevant for these searches.

Bob McElrath

2007-12-03T23:59:59.000Z

57

Guided Wave Inspection for Bottom Edge of Rails  

Science Journals Connector (OSTI)

Defects in a railhead and web can be detected with rail inspection cars and rail inspection tools equipped with special transducers such as wheel probes. However bottom edges of rails easily damaged regions due to contact to soil and fastening are blind zones for the conventional ultrasonic inspection technique in which signals are input from a railhead. In this paper inspection technique for defects in bottom edges of rails using guided waves were described. Dispersion curves for a rail obtained by a semi analytical finite element calculation show that a lot of propagating modes exist in a frequency region used for guided wave inspection eg. 10kHz 200kHz. Guided wave modes mainly vibrating a bottom edge of a rail were selected among the many modes in dispersion curves and then defect detection tests were done using the selected modes. Good reflections from an artificial defect and a rail end were obtained with a vertically vibrating mode.

T. Hayashi; Y. Miyazaki; M. Murase; T. Abe

2007-01-01T23:59:59.000Z

58

Thermal stress on bottom hole rock of gas drilling  

Science Journals Connector (OSTI)

Gas drilling has higher penetration than mud drilling. The greatest reason for this phenomenon with gas is that the gas is greatly cooled by expansion as it passes through the bit and thereby cools the bottom of the hole. The thermal stress at bottom-hole occurs during this process. The concept of thermal crushing of rocks is analysed in this study. The theoretical methods are developed to analyse thermal stresses and fragmentation induced by cooling of rock. Then, the numerical computation is conducted for the thermal stress equations with the numerical result simulated for the temperature field at the bottom hole to explain the reason of high drilling rates in gas drilling. Furthermore, an experiment was conducted to verify the theory. Therefore, the theories and simulated results in this paper have a guiding signification for best understand the technique and possibly to extend its economic advantage still further. [Received: September 23, 2011; Accepted: November 20, 2011

Shunji Yang; Gonghui Liu; Jun Li

2012-01-01T23:59:59.000Z

59

Bottom-Up Energy Analysis System (BUENAS) | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Bottom-Up Energy Analysis System (BUENAS) Jump to: navigation, search Tool Summary Name: BUENAS Agency/Company /Organization: Lawrence Berkeley National Laboratory Sector: Energy Focus Area: Buildings, Energy Efficiency Topics: Baseline projection, - Macroeconomic, Pathways analysis Resource Type: Software/modeling tools Website: www.superefficient.org/Resource%20Library/BUENAS%20-%20Bottom-Up%20Ene References: BUENAS Homepage[1] BUENAS for SEAD[2] Logo: BUENAS BUENAS stands for "Bottom-Up Energy Analysis System". It is used to project

60

Binary black hole mergers in gaseous environments: 'Binary Bondi' and 'binary Bondi-Hoyle-Lyttleton' accretion  

SciTech Connect (OSTI)

Merging supermassive black hole-black hole binaries produced in galaxy mergers are promising sources of detectable gravitational waves. If such a merger takes place in a gaseous environment, there is a possibility of a simultaneous detection of electromagnetic and gravitational radiation, as the stirring, shock heating, and accretion of the gas may produce variability and enhancements in the electromagnetic flux. Such a simultaneous detection can provide a wealth of opportunities to study gravitational physics, accretion physics, and cosmology. We investigate this scenario by performing fully general-relativistic, hydrodynamic simulations of merging, equal-mass, nonspinning black hole-black hole binaries embedded in gas clouds. We evolve the metric using the Baumgarte-Shapiro-Shibata-Nakamura formulation with standard moving puncture gauge conditions and handle the hydrodynamics via a high-resolution shock-capturing scheme. We consider both 'binary Bondi accretion' in which the binary is at rest relative to the ambient gas cloud, as well as 'binary Bondi-Hoyle-Lyttleton accretion' in which the binary moves relative to the gas cloud. The gas cloud is assumed to be homogeneous far from the binary and governed by a {Gamma}-law equation of state. We vary {Gamma} between 4/3 and 5/3. For each simulation, we compute the gas flow and accretion rate and estimate the electromagnetic luminosity due to bremsstrahlung and synchrotron emission. We find evidence for significant enhancements in both the accretion rate and luminosity over values for a single black hole of the same mass as the binary. We estimate that this luminosity enhancement should be detectable by the Large Synoptic Survey Telescope for a 10{sup 6}M{sub {center_dot}}binary in a hot gas cloud of density n{approx}10 cm{sup -3} and temperature T{approx}10{sup 6} K at z=1, reaching a maximum of L{approx}3x10{sup 43} erg s{sup -1}, with the emission peaking in the visible band, and lasting for {approx}1 hour.

Farris, Brian D.; Liu, Yuk Tung; Shapiro, Stuart L. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2010-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary Cycle Power Plants) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators.

62

Searching for gravitational waves from binary coalescence  

E-Print Network [OSTI]

We describe the implementation of a search for gravitational waves from compact binary coalescences in LIGO and Virgo data. This all-sky, all-time, multidetector search for binary coalescence has been used to search data ...

Vaulin, Ruslan

63

Urey Prize Lecture: Binary Minor Planets  

E-Print Network [OSTI]

in the Kuiper belt is uncertain by an order of magnitude due to poor knowledge of albedo/density. Distribution Binary objects detected by lightcurve are not included in this chart. Over 50 binary minor planets can

Margot, Jean-Luc

64

Nuclear reactor construction with bottom supported reactor vessel  

DOE Patents [OSTI]

An improved liquid metal nuclear reactor construction has a reactor core and a generally cylindrical reactor vessel for holding a large pool of low pressure liquid metal coolant and housing the core within the pool. The reactor vessel has an open top end, a closed flat bottom end wall and a continuous cylindrical closed side wall interconnecting the top end and bottom end wall. The reactor also has a generally cylindrical concrete containment structure surrounding the reactor vessel and being formed by a cylindrical side wall spaced outwardly from the reactor vessel side wall and a flat base mat spaced below the reactor vessel bottom end wall. A central support pedestal is anchored to the containment structure base mat and extends upwardly therefrom to the reactor vessel and upwardly therefrom to the reactor core so as to support the bottom end wall of the reactor vessel and the lower end of the reactor core in spaced apart relationship above the containment structure base mat. Also, an annular reinforced support structure is disposed in the reactor vessel on the bottom end wall thereof and extends about the lower end of the core so as to support the periphery thereof. In addition, an annular support ring having a plurality of inward radially extending linear members is disposed between the containment structure base mat and the bottom end of the reactor vessel wall and is connected to and supports the reactor vessel at its bottom end on the containment structure base mat so as to allow the reactor vessel to expand radially but substantially prevent any lateral motions that might be imposed by the occurrence of a seismic event. The reactor construction also includes a bed of insulating material in sand-like granular form, preferably being high density magnesium oxide particles, disposed between the containment structure base mat and the bottom end wall of the reactor vessel and uniformly supporting the reactor vessel at its bottom end wall on the containment structure base mat so as to insulate the reactor vessel bottom end wall from the containment structure base mat and allow the reactor vessel bottom end wall to freely expand as it heats up while providing continuous support thereof. Further, a deck is supported upon the side wall of the containment structure above the top open end of the reactor vessel, and a plurality of serially connected extendible and retractable annular bellows extend between the deck and the top open end of the reactor vessel and flexibly and sealably interconnect the reactor vessel at its top end to the deck. An annular guide ring is disposed on the containment structure and extends between its side wall and the top open end of the reactor vessel for providing lateral support of the reactor vessel top open end by limiting imposition of lateral loads on the annular bellows by the occurrence of a lateral seismic event.

Sharbaugh, John E. (Bullskin Township, Fayette County, PA)

1987-01-01T23:59:59.000Z

65

Complex dynamics in a short annular container with rotating bottom ...  

E-Print Network [OSTI]

We believe that these phenomena are novel in fluid dynamics, as is a ... outer radius Ro and length L, driven by the constant rotation of the inner cylinder and bottom .... Poisson-like equations are solved using the spectralGalerkin method presented in ... is a multiplicity of states over a small range of ? ? (2.8635, 2.

2004-02-10T23:59:59.000Z

66

Steam bottoming cycle for an adiabatic diesel engine  

SciTech Connect (OSTI)

A study of steam bottoming cycles using adiabatic diesel engine exhaust heat projected substantial performance and economic benefits for long haul trucks. A parametric analysis of steam cycle and system component variables, system cost, size and performance was conducted. An 811 K/6.90 MPa state-of-the-art reciprocating expander steam system with a monotube boiler and radiator core condenser was selected for preliminary design. When applied to a NASA specified turbo-charged adiabatic diesel the bottoming system increased the diesel output by almost 18%. In a comparison of the costs of the diesel with bottoming system (TC/B) and a NASA specified turbocompound adiabatic diesel with after-cooling with the same total output, the annual fuel savings less the added maintenance cost was determined to cover the increased initial cost of the TC/B system in a payback period of 2.3 years. Also during this program steam bottoming system freeze protection strategies were developed, technological advances required for improved system reliability were considered and the cost and performance of advanced systems were evaluated.

Poulin, E.; Demler, R.; Krepchin, I.; Walker, D.

1984-03-01T23:59:59.000Z

67

Ship Bottom, New Jersey: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Ship Bottom, New Jersey: Energy Resources Ship Bottom, New Jersey: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 39.642897°, -74.1804159° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.642897,"lon":-74.1804159,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

68

Integrated Rankine bottoming cycle for diesel truck engines  

SciTech Connect (OSTI)

This study assessed the feasibility of incorporating a Rankine bottoming cycle into a diesel truck engine. An organic Rankine bottoming cycle (ORBC) previously demonstrated by the US Department of Energy in a heavy-duty, long-haul truck reduced the truck's fuel consumption by about 12%. However, that system was considered too complex and costly to be commercialized. The integrated Rankine bottoming cycle (IRBC) described here is expected to be simpler and less costly than the ORBC. In the IRBC, one cylinder of a six-cylinder diesel truck engine will be used for power recovery, instead of the turbine and reduction gears of the ORBC; engine coolant will serve as the working fluid; and the engine radiator will also serve as the condenser. Toluene and steam were considered as working fluids in this assessment, and we concluded that steam (at 1000 psi, partially vaporized to about 33% saturation in the cylinder head, and superheated in an evaporator) would be the more practical of the two. Both heat exchangers are smaller than those of the ORBC system, but may pose a challenge in an under-the-hood installation. Overall, the concept appears feasible. 13 refs., 9 figs., 7 tabs.

Sekar, R.; Cole, R.L.

1987-09-01T23:59:59.000Z

69

DE-AI26-06NT42878 - Bottom Source Task | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in Deep Sea Sediments DE-AI26-06NT42878 - Bottom Source Task Last Reviewed 1172011 Project Goal The objective of this project is to develop and test a bottom-mounted seismic...

70

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash  

E-Print Network [OSTI]

using Iron-oxide Coated Coal Ash. In Arsenic Contaminationwaterusing iron?oxidecoatedcoalbottomash JohannaL. using iron-oxide coated coal bottom ash JOHANNA L. MATHIEU

MATHIEU, JOHANNA L.

2010-01-01T23:59:59.000Z

71

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

GEOTHERMAL ENERGYGeothermal Home GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators. Binary cycle power plants are closed-loop systems and virtually nothing (except water vapor) is emitted to the atmosphere. Resources below 400°F

72

Open bottom mesons in hot asymmetric hadronic medium  

E-Print Network [OSTI]

The in-medium masses and optical potentials of $B$ and ${\\bar B}$ mesons are studied in an isospin asymmetric, strange, hot and dense hadronic environment using a chiral effective model. The chiral $SU(3)$ model originally designed for the light quark sector, is generalized to include the heavy quark sector ($c$ and $b$) to derive the interactions of the $B$ and $\\bar B$ mesons with the light hadrons. Due to large mass of bottom quark, we use only the empirical form of these interactions for the desired purpose, while treating the bottom degrees of freedom to be frozen in the medium. Hence, all medium effects are due to the in-medium interaction of the light quark content of these open-bottom mesons. Both $B$ and $\\bar B$ mesons are found to experience net attractive interactions in the medium, leading to lowering of their masses in the medium. The mass degeneracy of particles and antiparticles, ($B^+$, $B^-$) as well as ($B^0$, ${\\bar B}^0$), is observed to be broken in the medium, due to equal and opposite contributions from a vectorial Weinberg-Tomozawa interaction term. Addition of hyperons to the medium lowers further the in-medium mass for each of these four mesons, while a non-zero isospin asymmetry is observed to break the approximate mass degeneracy of each pair of isospin doublets. These medium effects are found to be strongly density dependent, and bear a considerably weaker temperature dependence. The results obtained in the present investigation are compared to predictions from the quark-meson coupling model, heavy meson effective theory, and the QCD Sum Rule approach.

Divakar Pathak; Amruta Mishra

2014-09-02T23:59:59.000Z

73

Bottom-Fill Method for Stopping Leaking Oil Wells  

E-Print Network [OSTI]

Hardware failure at the top of a deep underwater oil well can result in a catastrophic oil leak. The enormous pressure lifting the column of oil in that well makes it nearly impossible to stop from the top with seals or pressurization. We propose to fill the bottom of the well with dense and possibly streamlined objects that can descend through the rising oil. As they accumulate, those objects couple to the oil via viscous and drag forces and increase the oil's effective density. When its effective density exceeds that of the earth's crust, the oil will have essentially stopped flowing.

Bloomfield, Louis A

2010-01-01T23:59:59.000Z

74

A Fast Search Technique for Binary Pulsars  

E-Print Network [OSTI]

I describe a computationally simple, efficient, and sensitive method to search long observations for pulsars in binary systems. The technique looks for orbitally induced sidebands in the power spectrum around a nominal spin frequency, enabling it to detect pulsars in high- or low-mass binaries with short orbital periods (P_orb <~ 5 h).

Scott M. Ransom

1999-11-05T23:59:59.000Z

75

Population synthesis of wide binary millisecond pulsars  

Science Journals Connector (OSTI)

......from our population synthesis code are in good agreement with those...s1, respectively. In model NS2, the maximum amount of mass...using a rapid binary evolution code based on the analytical approximation...adopted in our binary evolution code. We assume mass transfer to......

B. Willems; U. Kolb

2002-12-11T23:59:59.000Z

76

The Evolution of Compact Binary Star Systems  

E-Print Network [OSTI]

We review the formation and evolution of compact binary stars consisting of white dwarfs (WDs), neutron stars (NSs), and black holes (BHs). Mergings of compact binary stars are expected to be the most important sources for the forthcoming gravitational-wave (GW) astronomy. In the first part of the review, we discuss observational manifestations of close binary stars with NS and/or black components and their merger rate, crucial points in the formation and evolution of compact stars in binary systems, including the treatment of the natal kicks which NSs and BHs acquire during the core collapse of massive stars and the common envelope phase of binary evolution, which are most relevant to the merging rates of NS-NS, NS-BH and BH-BH binaries. The second part of the review is devoted mainly to formation and evolution of binary WDs and their observational manifestations, including their role as progenitors of cosmologically important thermonuclear SN Ia. We also consider AM CVn-stars which are thought to be the best verification binary GW sources for future low-frequency GW space interferometers.

Konstantin Postnov; Lev Yungelson

2014-03-21T23:59:59.000Z

77

Assembly of a Molecular Needle, from the Bottom Up  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Assembly of a Molecular Needle, Assembly of a Molecular Needle, from the Bottom Up Assembly of a Molecular Needle, from the Bottom Up Print Wednesday, 21 December 2005 00:00 Many pathogenic bacteria use a specialized secretion system to inject virulence proteins directly into the cells they infect. The injected proteins, by mimicking host-cell mechanisms, can then subvert normal cellular function. The type III secretion system (TTSS) is a sophisticated protein complex with an overall shape similar to a hypodermic needle. More than twenty unique types of proteins are required for its assembly, most of which are found among a wide variety of animal as well as plant pathogens. Electron microscopy has sketched the broad outlines of TTSS structure, but it does not have sufficient resolution to reveal the details required to understand, and eventually inhibit, the needle's function. At the ALS, researchers from Canada and the U.S. performed crystallographic studies of EscJ, the protein that makes up the needle's ring-shaped base. Their analysis of the EscJ ring not only presents a snapshot of one of the earliest structures generated in the TTSS assembly process, but also reveals features indicative of its role as the molecular platform for subsequent construction of the secretion apparatus.

78

Glass Development for Treatment of LANL Evaporator Bottoms Waste  

SciTech Connect (OSTI)

Vitrification is an attractive treatment option for meeting the stabilization and final disposal requirements of many plutonium (Pu) bearing materials and wastes at the Los Alamos National Laboratory (LANL) TA-55 facility, Rocky Flats Environmental Technology Site (RFETS), Hanford, and other Department of Energy (DOE) sites. The Environmental Protection Agency (EPA) has declared that vitrification is the "best demonstrated available technology" for high- level radioactive wastes (HLW) (Federal Register 1990) and has produced a handbook of vitriilcation technologies for treatment of hazardous and radioactive waste (US EPA, 1992). This technology has been demonstrated to convert Pu-containing materials (Kormanos, 1997) into durable (Lutze, 1988) and accountable (Forsberg, 1995) waste. forms with reduced need for safeguarding (McCulhun, 1996). The composition of the Evaporator Bottoms Waste (EVB) at LANL, like that of many other I%-bearing materials, varies widely and is generally unpredictable. The goal of this study is to optimize the composition of glass for EVB waste at LANL, and present the basic techniques and tools for developing optimized glass compositions for other Pu-bearing materials in the complex. This report outlines an approach for glass formulation with fixed property restrictions, using glass property-composition databases. This approach is applicable to waste glass formulation for many variable waste streams and vitrification technologies.. Also reported are the preliminary property data for simulated evaporator bottom glasses, including glass viscosity and glass leach resistance using the Toxicity Characteristic Leaching Procedure (TCLP).

DE Smith; GF Piepel; GW Veazey; JD Vienna; ML Elliott; RK Nakaoka; RP Thimpke

1998-11-20T23:59:59.000Z

79

Monolithic Active Pixel Matrix with Binary Counters (MAMBO) ASIC  

SciTech Connect (OSTI)

Monolithic Active Matrix with Binary Counters (MAMBO) is a counting ASIC designed for detecting and measuring low energy X-rays from 6-12 keV. Each pixel contains analogue functionality implemented with a charge preamplifier, CR-RC{sup 2} shaper and a baseline restorer. It also contains a window comparator which can be trimmed by 4 bit DACs to remove systematic offsets. The hits are registered by a 12 bit ripple counter which is reconfigured as a shift register to serially output the data from the entire ASIC. Each pixel can be tested individually. Two diverse approaches have been used to prevent coupling between the detector and electronics in MAMBO III and MAMBO IV. MAMBO III is a 3D ASIC, the bottom ASIC consists of diodes which are connected to the top ASIC using {mu}-bump bonds. The detector is decoupled from the electronics by physically separating them on two tiers and using several metal layers as a shield. MAMBO IV is a monolithic structure which uses a nested well approach to isolate the detector from the electronics. The ASICs are being fabricated using the SOI 0.2 {micro}m OKI process, MAMBO III is 3D bonded at T-Micro and MAMBO IV nested well structure was developed in collaboration between OKI and Fermilab.

Khalid, Farah F.; Deptuch, Grzegorz; Shenai, Alpana; Yarema, Raymond J.; /Fermilab

2010-11-01T23:59:59.000Z

80

Integrating hospital information systems: a bottom-up approach  

Science Journals Connector (OSTI)

The growing complexity of hospital information systems has prompted information systems managers to seek applicable solutions for integrating their systems. While many successful applications of information systems have been introduced and implemented in the hospital environment, the integration of heterogeneous applications in existing, multi-vendor, computing environments into a cohesive hospital-wide information system has proved to be complicated and difficult to accomplish. This paper discusses systems integration in hospitals and presents a conceptual framework for bottom-up integration of hospital information systems. The scope of the proposed framework is the integration of stand-alone clinical, administrative and financial information elements of a hospital into a unified system environment with a central medical data warehouse.

Moshe Zviran; Aviad Armoni

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Reach the Bottom Line of the Sbottom Search  

SciTech Connect (OSTI)

We propose a new search strategy for directly-produced sbottoms at the LHC with a small mass splitting between the sbottom and its decayed stable neutralino. Our search strategy is based on boosting sbottoms through an energetic initial state radiation jet. In the final state, we require a large missing transverse energy and one or two b-jets besides the initial state radiation jet. We also define a few kinematic variables to further increase the discovery reach. For the case that the sbottom mainly decays into the bottom quark and the stable neutralino, we have found that even for a mass splitting as small as 10 GeV sbottoms with masses up to around 400 GeV can be excluded at the 95% confidence level with 20 inverse femtobarn data at the 8 TeV LHC.

Alvarez, Ezequiel; Bai, Yang

2012-05-22T23:59:59.000Z

82

A Statistical Analysis Of Bottom-Hole Temperature Data In The...  

Open Energy Info (EERE)

Considerable differences in the spread of bottom-hole temperature values from petroleum exploration well logs plotted as a function of depth are observed over a region of...

83

E-Print Network 3.0 - antarctic bottom fauna Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

a It is clear from both cladistic Summary: ) A general review of the Antarctic bottom fish fauna, in Fifth Congressof European Ichthyologists Proceedings... The recent...

84

A note on the stability theory of buoyancy-driven ocean currents over a sloping bottom  

Science Journals Connector (OSTI)

In a previous paper, a new model was derived describing the baroclinic dynamics of buoyancy-driven ocean currents over a sloping bottom. In particular,...

Richard H. Karsten; Gordon E. Swaters

1996-01-01T23:59:59.000Z

85

Performance Comparison of Bottom and Top Emitting LWIR (8 ?m) LED Devices  

Science Journals Connector (OSTI)

For similar substrate thickness, flip-chip mount bottom emitting LWIR LED device has higher light intensity than top emitting device. Enhanced emission is attributed to better cooling...

Das, Naresh C; Chang, Wayne

86

Binary mixture flammability characteristics for hazard assessment  

E-Print Network [OSTI]

calculations and UNIFAC, a theoretical model that does not require experimental binary interaction parameters, are employed in the mixture flash point predictions, which are validated with experimental data. MFPB is successfully predicted using the UNIFAC model...

Vidal Vazquez, Migvia del C.

2005-11-01T23:59:59.000Z

87

Black hole binary inspiral and trajectory dominance  

E-Print Network [OSTI]

Gravitational waves emitted during the inspiral, plunge and merger of a black hole binary carry linear momentum. This results in an astrophysically important recoil to the final merged black hole, a kick that can eject ...

Price, Richard H.

88

Optimization of nave dynamic binary instrumentation Tools/  

E-Print Network [OSTI]

The proliferation of dynamic program analysis tools has done much to ease the burden of developing complex software. However, creating such tools remains a challenge. Dynamic binary instrumentation frameworks such as ...

Kleckner, Reid (Reid N.)

2011-01-01T23:59:59.000Z

89

New bounds on optimal binary search trees  

E-Print Network [OSTI]

Binary search trees (BSTs) are a class of simple data structures used to store and access keys from an ordered set. They have been around for about half a century. Despite their ubiquitous use in practical programs, ...

Harmon, Dion (Dion Kane)

2006-01-01T23:59:59.000Z

90

ROTATIONAL DOPPLER BEAMING IN ECLIPSING BINARIES  

SciTech Connect (OSTI)

In eclipsing binaries the stellar rotation of the two components will cause a rotational Doppler beaming during eclipse ingress and egress when only part of the eclipsed component is covered. For eclipsing binaries with fast spinning components this photometric analog of the well-known spectroscopic Rossiter-McLaughlin effect can exceed the strength of the orbital effect. Example light curves are shown for a detached double white dwarf binary, a massive O-star binary and a transiting exoplanet case, similar to WASP-33b. Inclusion of the rotational Doppler beaming in eclipsing systems is a prerequisite for deriving the correct stellar parameters from fitting high-quality photometric light curves and can be used to determine stellar obliquities as well as, e.g., an independent measure of the rotational velocity in those systems that may be expected to be fully synchronized.

Groot, Paul J., E-mail: pgroot@astro.ru.nl [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States)

2012-01-20T23:59:59.000Z

91

Detection Rates for Close Binaries Via Microlensing  

E-Print Network [OSTI]

Microlensing is one of the most promising methods of reconstructing the stellar mass function down to masses even below the hydrogen-burning limit. The fundamental limit to this technique is the presence of unresolved binaries, which can in principle significantly alter the inferred mass function. Here we quantify the fraction of binaries that can be detected using microlensing, considering specifically the mass ratio and separation of the binary. We find that almost all binary systems with separations greater than $b \\sim 0.4$ of their combined Einstein ring radius are detectable assuming a detection threshold of $3\\%$. For two M dwarfs, this corresponds to a limiting separation of $\\gsim 1 \\au$. Since very few observed M dwarfs have companions at separations $\\lsim 1 \\au$, we conclude that close binaries will probably not corrupt the measurements of the mass function. We find that the detectability depends only weakly on the mass ratio. For those events for which individual masses can be determined, we find that binaries can be detected down to $b \\sim 0.2$.

B. Scott Gaudi; Andrew Gould

1996-06-17T23:59:59.000Z

92

Method for using fast fluidized bed dry bottom coal gasification  

DOE Patents [OSTI]

Carbonaceous solid material such as coal is gasified in a fast fluidized bed gasification system utilizing dual fluidized beds of hot char. The coal in particulate form is introduced along with oxygen-containing gas and steam into the fast fluidized bed gasification zone of a gasifier assembly wherein the upward superficial gas velocity exceeds about 5.0 ft/sec and temperature is 1500.degree.-1850.degree. F. The resulting effluent gas and substantial char are passed through a primary cyclone separator, from which char solids are returned to the fluidized bed. Gas from the primary cyclone separator is passed to a secondary cyclone separator, from which remaining fine char solids are returned through an injection nozzle together with additional steam and oxygen-containing gas to an oxidation zone located at the bottom of the gasifier, wherein the upward gas velocity ranges from about 3-15 ft/sec and is maintained at 1600.degree.-200.degree. F. temperature. This gasification arrangement provides for increased utilization of the secondary char material to produce higher overall carbon conversion and product yields in the process.

Snell, George J. (Fords, NJ); Kydd, Paul H. (Lawrenceville, NJ)

1983-01-01T23:59:59.000Z

93

Indirect-fired gas turbine bottomed with fuel cell  

DOE Patents [OSTI]

An indirect-heated gas turbine cycle is bottomed with a fuel cell cycle with the heated air discharged from the gas turbine being directly utilized at the cathode of the fuel cell for the electricity-producing electrochemical reaction occurring within the fuel cell. The hot cathode recycle gases provide a substantial portion of the heat required for the indirect heating of the compressed air used in the gas turbine cycle. A separate combustor provides the balance of the heat needed for the indirect heating of the compressed air used in the gas turbine cycle. Hot gases from the fuel cell are used in the combustor to reduce both the fuel requirements of the combustor and the NOx emissions therefrom. Residual heat remaining in the air-heating gases after completing the heating thereof is used in a steam turbine cycle or in an absorption refrigeration cycle. Some of the hot gases from the cathode can be diverted from the air-heating function and used in the absorption refrigeration cycle or in the steam cycle for steam generating purposes.

Micheli, Paul L. (Morgantown, WV); Williams, Mark C. (Morgantown, WV); Parsons, Edward L. (Morgantown, WV)

1995-01-01T23:59:59.000Z

94

Solution of 2D Boussinesq systems with FreeFem++: the flat bottom case  

E-Print Network [OSTI]

Solution of 2D Boussinesq systems with FreeFem++: the flat bottom case Georges Sadaka May 14, 2012-parameter family of Boussinesq type systems in two space dimensions which approx- imate the three-dimensional Euler and Mitsotakis have developed a code in finite volumes for the Boussinesq system with variable bottom in 1D ([Dut

Paris-Sud XI, Université de

95

Looking for Dark Matter through the Bottom of a Wine Glass!  

E-Print Network [OSTI]

, and detect the imprint of dark energy on the web of dark matter that winds across the cosmos. Café Email listLooking for Dark Matter through the Bottom of a Wine Glass! (IYA Strange Telescope Series://cfcpwork.uchicago.edu/mailman/listinfo/cafe! #12;Looking for Dark Matter through the Bottom of a Wine Glass! (IYA Strange Telescope Series

Collar, Juan I.

96

Bottom-up, social innovation for addressing climate change Noam Bergman, University of Oxford  

E-Print Network [OSTI]

1 Bottom-up, social innovation for addressing climate change Noam Bergman, University of Oxford and practice in the area of bottom-up, social innovation could yield benefits if integrated into wider considerations of research and policy development concerning climate change. Taking social innovation to include

97

Sediment Quality Triad Assessment in Kachemak Bay: Characterization of Soft Bottom Benthic Habitats and  

E-Print Network [OSTI]

Sediment Quality Triad Assessment in Kachemak Bay: Characterization of Soft Bottom Benthic Habitats. Sediment Quality Triad Assessment in Kachemak Bay: Characterization of Soft Bottom Benthic Habitats and Contaminant Bioeffects Assessment. NOAA Technical Memorandum NOS NCCOS 104. 170pp. #12;iii Sediment Quality

98

Bottom Up and Country Led: A New Framework for Climate Action | Open Energy  

Open Energy Info (EERE)

Bottom Up and Country Led: A New Framework for Climate Action Bottom Up and Country Led: A New Framework for Climate Action Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Bottom Up and Country Led: A New Framework for Climate Action Agency/Company /Organization: Booz and Company Sector: Energy, Land, Climate Topics: Low emission development planning Resource Type: Publications Website: www.booz.com/global/home/what_we_think/reports_and_white_papers/ic-dis Cost: Free Bottom Up and Country Led: A New Framework for Climate Action Screenshot References: Bottom Up and Country Led: A New Framework for Climate Action[1] "As delegates gather for the Climate Change Conference in Cancun in late 2010, they can benefit from familiarizing themselves with the set of tools available for mitigation and adaptation, as well as how these tools can fit

99

Effect of fuel properties on the bottom ash generation rate by a laboratory fluidized bed combustor  

SciTech Connect (OSTI)

The range of fuels that can be accommodated by an FBC boiler system is affected by the ability of the fuel, sorbent, and ash-handling equipment to move the required solids through the boiler. Of specific interest is the bottom ash handling equipment, which must have sufficient capacity to remove ash from the system in order to maintain a constant bed inventory level, and must have sufficient capability to cool the ash well below the bed temperature. Quantification of a fuel's bottom ash removal requirements can be useful for plant design. The effect of fuel properties on the rate of bottom ash production in a laboratory FBC test system was examined. The work used coal products ranging in ash content from 20 to 40+ wt. %. The system's classification of solids by particle size into flyash and bottom ash was characterized using a partition curve. Fuel fractions in the size range characteristic of bottom ash were further analyzed for distributions of ash content with respect to specific gravity, using float sink tests. The fuel fractions were then ashed in a fixed bed. In each case, the highest ash content fraction produced ash with the coarsest size consist (characteristic of bottom ash). The lower ash content fractions were found to produce ash in the size range characteristic of flyash, suggesting that the high ash content fractions were largely responsible for the production of bottom ash. The contributions of the specific gravity fractions to the composite ash in the fuels were quantified. The fuels were fired in the laboratory test system. Fuels with higher amounts of high specific gravity particles, in the size ranges characteristic of bottom ash, were found to produce more bottom ash, indicating the potential utility of float sink methods in the prediction of bottom ash removal requirements.

Rozelle, P.L.; Pisupati, S.V.; Scaroni, A.W. [Penn State University, University Park, PA (United States). Dept. of Energy & Geoenvironmental Engineering

2007-06-15T23:59:59.000Z

100

Peach Bottom and Vermont Yankee Nuclear Power Plants  

SciTech Connect (OSTI)

A dramatic and extraordinary instance of state and local government control of nuclear power, the purchase by New York of the Shoreham plant is nonetheless indicative of the political demands that some states confront for additional involvement in the regulation of the radiological hazards associated with commercial nuclear power plants. Although the Supreme Court has appeared to expand, in the eight years since PG&E and Silkwood, the acceptable extent of state regulation, some states, in addition to New York, have acquired, with the acquiescence of the NRC, a degree of involvement that exceeds the role for state and local governments provided by the Court. For example, the Commonwealth of Pennsylvania concluded with the Philadelphia Electric Company (PECO) in June 1989 an agreement that commits PECO to various initiatives, not otherwise required under NRC regulations, for the safe operation of the Peach Bottom nuclear power plant in Pennsylvania. In July 1991 the State of Vermont and Vermont Yankee Nuclear Power Corporation (Vermont Yankee) concluded an agreement similar to that concluded between Pennsylvania and PECO. The agreement also commits Vermont Yankee to certain initiatives, not otherwise required under NRC regulations, related to its operation of the Vermont Yankee nuclear power plant in Vermont. The agreement was precipitated by a challenge to an application, submitted to the NRC by Vermont Yankee in April 1989, to amend the Vermont Yankee plant license to extend its expiration date from December 11, 2007 to March 21, 2012. The amendment would allow the Vermont Yankee plant to operate for forty full years.

NONE

1992-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

TIDAL NOVAE IN COMPACT BINARY WHITE DWARFS  

SciTech Connect (OSTI)

Compact binary white dwarfs (WDs) undergoing orbital decay due to gravitational radiation can experience significant tidal heating prior to merger. In these WDs, the dominant tidal effect involves the excitation of outgoing gravity waves in the inner stellar envelope and the dissipation of these waves in the outer envelope. As the binary orbit decays, the WDs are synchronized from outside in (with the envelope synchronized first, followed by the core). We examine the deposition of tidal heat in the envelope of a carbon-oxygen WD and study how such tidal heating affects the structure and evolution of the WD. We show that significant tidal heating can occur in the star's degenerate hydrogen layer. This layer heats up faster than it cools, triggering runaway nuclear fusion. Such 'tidal novae' may occur in all WD binaries containing a CO WD, at orbital periods between 5 minutes and 20 minutes, and precede the final merger by 10{sup 5}-10{sup 6} years.

Fuller, Jim; Lai Dong [Department of Astronomy, Cornell University, Ithaca, NY 14850 (United States)

2012-09-01T23:59:59.000Z

102

Hybrid black-hole binary initial data  

E-Print Network [OSTI]

Traditional black-hole binary puncture initial data is conformally flat. This unphysical assumption is coupled with a lack of radiation signature from the binary's past life. As a result, waveforms extracted from evolutions of this data display an abrupt jump. In Kelly et al. [Class.Quant.Grav.27:114005,2010], a new binary black-hole initial data with radiation contents derived in the post-Newtonian (PN) calculation was adapted to puncture evolutions in numerical relativity. This data satisfies the constraint equations to the 2.5PN order, and contains a transverse-traceless "wavy" metric contribution, violating the standard assumption of conformal flatness. Although the evolution contained less spurious radiation, there were undesired features; the unphysical horizon mass loss and the large initial orbital eccentricity. Introducing a hybrid approach to the initial data evaluation, we significantly reduce these undesired features.

Bruno C. Mundim; Bernard J. Kelly; Yosef Zlochower; Hiroyuki Nakano; Manuela Campanelli

2010-12-04T23:59:59.000Z

103

Understanding white dwarf binary evolution with white dwarf/main sequence binaries: first results from SEGUE  

E-Print Network [OSTI]

Close white dwarf binaries make up a wide variety of objects such as double white dwarf binaries, which are possible SN Ia progenitors, cataclysmic variables, super soft sources, or AM CVn stars. The evolution and formation of close white dwarf binaries crucially depends on the rate at which angular momentum is extracted from the binary orbit. The two most important sources of angular momentum loss are the common envelope phase and magnetic braking. Both processes are so far poorly understood. Observational population studies of white dwarf/main sequence binaries provide the potential to significantly progress with this situation and to clearly constrain magnetic braking and the CE-phase. However, the current population of white dwarf/main sequence binaries is highly incomplete and heavily biased towards young systems containing hot white dwarfs. The SDSSII/SEGUE collaboration awarded us with 5 fibers per plate pair in order to fill this gap and to identify the required unbiased sample of old white dwarf/main sequence binaries. The success rate of our selection criteria exceeds 65% and during the first 10 months we have identified 41 new systems, most of them belonging to the missed old population.

M. R. Schreiber; A. Nebot Gomez-Moran; A. D. Schwope

2006-11-15T23:59:59.000Z

104

Dynamical Tides in Rotating Binary Stars  

Science Journals Connector (OSTI)

We study the effect of rotation on the excitation of internal oscillation modes of a star by the external gravitational potential of its companion. Unlike the nonrotating case, there are difficulties with the usual mode decomposition for rotating stars because of the asymmetry between modes propagating in the direction of rotation and those propagating opposite to it. For an eccentric binary system, we derive general expressions for the energy transfer, ?Es, and the corresponding angular momentum transfer, ?Js, in a periastron passage when there is no initial oscillation present in the star. Except when a nearly precise orbital resonance occurs (i.e., the mode frequency equals multiple of the orbital frequency), ?Es is very close to the steady state mode energy in the tide in the presence of dissipation. It is shown that stellar rotation can change the strength of dynamical tide significantly. In particular, retrograde rotation with respect to the orbit increases the energy transfer by bringing lower order g-modes (or f-modes for convective stars), which couple more strongly to the tidal potential, into closer resonances with the orbital motion of the companion. We apply our general formalism to the problems of tidal capture binary formation and the orbital evolution of the PSR J0045-7319/B star binary. Stellar rotation changes the critical impact parameter for binary capture. Although the enhancement (by retrograde rotation) in the capture cross section is at most ~20%, the probability that the captured system survives disruption/merging and therefore becomes a binary can be significantly larger. It is found that in order to explain the observed rapid orbital decay of the PSR J0045-7319 binary system, retrograde rotation in the B star is required.

Dong Lai

1997-01-01T23:59:59.000Z

105

Hydrothermal treatment of MSWI bottom ash forming acid-resistant material  

SciTech Connect (OSTI)

To recycle municipal solid waste incinerator (MSWI) bottom ash, synthesis of hydrothermal minerals from bottom ash was performed to stabilize heavy metals. MSWI bottom ash was mixed with SiO{sub 2}, Al(OH){sub 3}, and Mg(OH){sub 2} so its chemical composition was similar to that of hydrothermal clay minerals. These solid specimens were mixed with water at a liquid/solid ratio of 5. The reaction temperature was 200 deg. C, and reactions were performed for 24-240 h. Generation of kaolinite/smectite mixed-layer clay mineral was found in the samples after the reaction of the mixture of bottom ash, SiO{sub 2}, and Mg(OH){sub 2}. Calcium silicate hydrate minerals such as tobermorite and xonotlite were also generated. X-ray powder diffraction suggested the presence of amorphous materials. Leaching tests at various pHs revealed that the concentration of heavy metals in the leachates from MSWI bottom ash hydrothermally treated with SiO{sub 2} and Mg(OH){sub 2} was lower than that in leachates from non-treated bottom ash, especially under acid conditions. Hydrothermal treatment with modification of chemical composition may have potential for the recycling of MSWI bottom ash.

Etoh, Jiro [Department of Urban and Environmental Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan)], E-mail: etoh@doc.kyushu-u.ac.jp; Kawagoe, Takeshi [Department of Earth System Engineering, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan); Shimaoka, Takayuki [Department of Urban and Environmental Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan); Watanabe, Koichiro [Department of Earth System Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan)

2009-03-15T23:59:59.000Z

106

KOI-3278: A Self-Lensing Binary Star System  

Science Journals Connector (OSTI)

...eclipsing binary. By modeling the pulse as gravitational...the Quasiperiodic Automated Transit Search algorithm (17) turned...The quasiperiodic automated transit search algorithm...Eggleton P. P. , Rapid binary star evolution for N-body simulations and population synthesis...

Ethan Kruse; Eric Agol

2014-04-18T23:59:59.000Z

107

Lattice Boltzmann simulations of binary fluid flow through porous media  

Science Journals Connector (OSTI)

...V. Coveney and S. Succi Lattice Boltzmann simulations of binary fluid...D-80290 Munchen, Germany The lattice Boltzmann equation is often advocated...three-dimensional 19 velocity lattice Boltzmann model for immiscible binary...

2002-01-01T23:59:59.000Z

108

GENERATING BINARY PROCESSES WITH ALL-POLE SPECTRA Petros Boufounos  

E-Print Network [OSTI]

GENERATING BINARY PROCESSES WITH ALL-POLE SPECTRA Petros Boufounos MIT Digital signal Processing presents an algorithm to generate autoregressive random binary processes with predefined mean spectrum. The process is generated recursively using a linear combination of the previously generated

Boufounos, Petros T.

109

Geothermal Binary Power Generation System Using Unutilized Energy  

Science Journals Connector (OSTI)

Binary power generating system is based on the Rankine cycle with geothermal fluid as heating source and low boiling ... can generate electric power from low temperature (energy) source. Employing the binary powe...

Hiroaki Shibata; Hiroshi Oyama

2007-01-01T23:59:59.000Z

110

Binary Capture Rates for Massive Protostars  

E-Print Network [OSTI]

The high multiplicity of massive stars in dense, young clusters is established early in their evolution. The mechanism behind this remains unresolved. Recent results suggest that massive protostars may capture companions through disk interactions with much higher efficiency than their solar mass counterparts. However, this conclusion is based on analytic determinations of capture rates and estimates of the robustness of the resulting binaries. We present the results of coupled n-body and SPH simulations of star-disk encounters to further test the idea that disk-captured binaries contribute to the observed multiplicity of massive stars.

Nickolas Moeckel; John Bally

2007-04-09T23:59:59.000Z

111

Lattice Boltzmann model for binary mixtures  

Science Journals Connector (OSTI)

An a priori derivation of the lattice Boltzmann equations for binary mixtures is provided by discretizing the Boltzmann equations that govern the evolution of binary mixtures. The present model leads to a set of two-fluid hydrodynamic equations for the mixture. In existing models, employing the single-relaxation-time approximation, the viscosity and diffusion coefficients are coupled through the relaxation parameter ?, thus limited to unity Prandtl number and Schmidt number. In the present model the viscosity and diffusion coefficient are independently controlled by two relaxation parameters, thus enabling the modeling of mixtures with an arbitrary Schmidt number. The theoretical framework developed here can be readily applied to multiple-species mixing.

Li-Shi Luo and Sharath S. Girimaji

2002-09-27T23:59:59.000Z

112

Small geothermal binary plants in Mexico  

SciTech Connect (OSTI)

In Mexico, Comision Federal de Electricidad (CFE Federal Commission of Electricity) has identified several low enthalpy sites related with thermal water, at shallow depths. Some of those geothermal prospects are located far from the electrical national grid. In some cases, the population solve their electricity needs by internal combustion engines with very high operating costs. CFE has started a project oriented to use the energy contained in the thermal waters with off-grid binary plants. The two first projects are in the state of Chihuahua at the north of the country: San Antonio El Bravo and Maguarichic. At both places CFE will install a 300 kW, unattended binary power units.

Lopez-Diaz, M.

1996-12-31T23:59:59.000Z

113

Chemical Stimulation Treatment of the Rossi 21-19 Well Beowawe Geothermal Field  

SciTech Connect (OSTI)

The tests reported were part of the DOE Geothermal Reservoir Well Stimulation Program. This was an attempt to ameliorate near-wellbore restricted permeability in a well at a field where other wells flowed at high rates. The two stage treatment first injected HCl followed by a large volume of HCl-HF acid solution. This was a relatively inexpensive treatment, with costs shown. Injectivity tests showed a 2.2 fold increase in injectivity attributable to the second treatment, but mechanical complications with the well precluded an adequate production test. Flow of the fluid out into the formation was measured by Sandia using surface electrical potential. LANL detected microseismic events during the stimulation, which might be especially significant.

None

1984-01-01T23:59:59.000Z

114

The bottom currents in the area of abyssal hills in the north-east tropical Pacific Ocean  

Science Journals Connector (OSTI)

The results of simultaneous measurements of the bottom (6.25 and 35 m above the bottom) currents, deep currents, and surface currents made at three points in the north-east tropical Pacific Ocean are given. The b...

T. A. Demidova; E. A. Kontar'; A. V. Sokov; A. M. Belyaev

1993-01-01T23:59:59.000Z

115

Mastering the pilot domestic binary combined-cycle plants  

Science Journals Connector (OSTI)

Results are presented from mastering the pilot binary combined-cycle plants of Type PGU-450T (installed at...

Yu. A. Radin

2006-07-01T23:59:59.000Z

116

Bottom-up Representation of Industrial Energy Efficiency Technologies in Integrated Assessment Models for the Cement Sector  

E-Print Network [OSTI]

system that runs a steam turbine system (bottom cycle).This report focuses on the steam turbine system since these

Sathaye, J.

2011-01-01T23:59:59.000Z

117

Binary Codes In this lesson, you will study  

E-Print Network [OSTI]

Coded Decimal (BCD), Error detection codes, Character codes 2. Coding versus binary conversion. Binary Decimal (BCD) code which corresponds to the first 10 binary representations of the decimal digits 0-9. The BCD code requires 4 bits to represent the 10 decimal digits. Since 4 bits may have up to 16 different

Bouhraoua, Abdelhafid

118

CSP for binary conservative relational structures  

E-Print Network [OSTI]

We prove that whenever A is a 3-conservative relational structure with only binary and unary relations then the algebra of polymorphisms of A either has no Taylor operation (i.e. CSP(A) is NP-complete), or generates a congruence meet semidistributive variety (i.e. CSP(A) has bounded width).

Kazda, Alexandr

2011-01-01T23:59:59.000Z

119

The electromagnetic signals of compact binary mergers  

Science Journals Connector (OSTI)

......to the dynamical ejecta of ns2 and nsbh binaries. Our study...for recent reviews. Our code is an updated version of the...earlier peak. b The canonical ns2 case. c This is the maximal signal from our runs of ns2 mergers. d nsbh merger. The......

Tsvi Piran; Ehud Nakar; Stephan Rosswog

2013-01-01T23:59:59.000Z

120

Supermassive Black Hole Binaries: The Search Continues  

E-Print Network [OSTI]

Gravitationally bound supermassive black hole binaries (SBHBs) are thought to be a natural product of galactic mergers and growth of the large scale structure in the universe. They however remain observationally elusive, thus raising a question about characteristic observational signatures associated with these systems. In this conference proceeding I discuss current theoretical understanding and latest advances and prospects in observational searches for SBHBs.

Tamara Bogdanovic

2014-06-19T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Binary Tomography with Deblurring Stefan Weber1  

E-Print Network [OSTI]

two scenarios of limited-angle binary tomography with data distorted with an unknown convolution: Either the projec- tion data are taken from a blurred object, or the projection data them- selves the projection data before reconstruction (let us call them preprocessing) and then the reconstruction

Schnörr, Christoph

122

A Statistical Analysis Of Bottom-Hole Temperature Data In The Hinton Area  

Open Energy Info (EERE)

A Statistical Analysis Of Bottom-Hole Temperature Data In The Hinton Area A Statistical Analysis Of Bottom-Hole Temperature Data In The Hinton Area Of West-Central Alberta Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Statistical Analysis Of Bottom-Hole Temperature Data In The Hinton Area Of West-Central Alberta Details Activities (0) Areas (0) Regions (0) Abstract: Considerable differences in the spread of bottom-hole temperature values from petroleum exploration well logs plotted as a function of depth are observed over a region of west-central Alberta. The spatial variation of the spread is investigated, and it is found to be greater toward the Rocky Mountain disturbed belt in the west. The spatial variation there does not seem to correspond directly to local topography, and may be partly due

123

Energy-Saving Bottom-Lit LED Backlight with Angle-Control Freeform Lens  

Science Journals Connector (OSTI)

In this paper, relation of transmittance of prism sheets used in bottom-lit LED backlight on the direction of incident light was studied. Freeform lens was utilized to enhance the...

Qin, Zong; Wang, Kai; Wang, Shang; Liu, Sheng

124

Radiological characterization of main cooling reservoir bottom sediments at The South Texas Project Electrical Generating Station  

E-Print Network [OSTI]

. The purpose of this study was to accurately profile the radionuclide distribution of important gamma emitting nuclides and their concentrations in the bottom sediment of the STPEGS main cooling reservoir (MCR). A Loran-C navigation system was used...

Blankinship, David Randle

2012-06-07T23:59:59.000Z

125

Best practices for the sustainable scaleup of lighting technologies in bottom of the pyramid communities  

E-Print Network [OSTI]

This thesis deduces a set of best practices for sustainably scaling up lighting technologies in developing countries with a focus on Bottom-of-the-Pyramid (BOP) communities, whose annual incomes are US $3000 or less (in ...

Alekal, Pragnya Y. (Pragnya Yogesh), 1977-

2007-01-01T23:59:59.000Z

126

A Numerical Investigation of Formation and Variability of Antarctic Bottom Water off Cape Darnley, East Antarctica  

Science Journals Connector (OSTI)

At several locations around Antarctica, dense water is formed as a result of intense sea ice formation. When this dense water becomes sufficiently denser than the surrounding water, it descends the continental slope and forms Antarctic Bottom ...

Yoshihiro Nakayama; Kay I. Ohshima; Yoshimasa Matsumura; Yasushi Fukamachi; Hiroyasu Hasumi

2014-11-01T23:59:59.000Z

127

Identification of Bottom Contribution in Non-photonic Electron Spectra and $v_2$ at RHIC  

E-Print Network [OSTI]

We present a study on the spectra for heavy flavor (charm and bottom) decayed electrons in 200 GeV $p+p$ collisions and provide the relative contributions of charm and bottom hadrons from the PYTHIA calculations. The results suggest that the crossing point of the electron spectra from charm and bottom decays is above 7 GeV/$c$ and bottom contribution is not dominant for electron $p_{T}<3$ GeV/$c$. The upper limit of the relative cross section ratio is reported as $\\sigma_{b\\bar{b}}/\\sigma_{c\\bar{c}}\\leq(0.49\\pm0.09\\pm0.09)%$. We also compare the $v_2$ distribution from simulation to the experimental data in 200 GeV $Au+Au$ collisions and estimate the possible charm $v_2$.

Yifei Zhang

2008-05-15T23:59:59.000Z

128

Oblique sub- and super-harmonic Bragg resonance of surface waves by bottom ripples  

E-Print Network [OSTI]

We consider a class of higher order (quartet) Bragg resonance involving two incident wave components and a bottom ripple component (so called class III Bragg resonance). In this case, unlike class I/II Bragg resonance ...

Alam, Mohammad-Reza

129

E-Print Network 3.0 - ash bottom ash Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: of bottom ash, 3 million tons of boiler slag, and 28 million tons of clean-coal ash materials) were produced... CONTAINING CLEAN-COAL ASH AND CLASS F FLY ASH By...

130

The Impact of Finite-Amplitude Bottom Topography on Internal Wave Generation in the Southern Ocean  

Science Journals Connector (OSTI)

Direct observations in the Southern Ocean report enhanced internal wave activity and turbulence in a kilometer-thick layer above rough bottom topography collocated with the deep-reaching fronts of the Antarctic Circumpolar Current. Linear theory, ...

Maxim Nikurashin; Raffaele Ferrari; Nicolas Grisouard; Kurt Polzin

2014-11-01T23:59:59.000Z

131

Use of ammonia to reduce the viscosity of bottoms streams produced in hydroconversion processes  

DOE Patents [OSTI]

Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular weight liquids and produce a heavy bottoms stream containing high molecular weight liquids and unconverted carbonaceous material. The viscosity of the bottoms streams produced in the separation step or steps is prevented from increasing rapidly by treating the feed to the separation step or steps with ammonia gas prior to or during the separation step or steps. The viscosity of the heavy bottoms stream produced in the final separation step is also controlled by treating these bottoms with ammonia gas. In a preferred embodiment of the invention, the effluent from the hydroconversion reactor is subjected to an atmospheric distillation followed by a vacuum distillation and the feeds to these distillations are contacted with ammonia during the distillations.

Zaczepinski, Sioma (Houston, TX); Billimoria, Rustom M. (Houston, TX); Tao, Frank (Baytown, TX); Lington, Christopher G. (Houston, TX); Plumlee, Karl W. (Baytown, TX)

1984-01-01T23:59:59.000Z

132

Variability of bottom water domes and geostrophic currents in the eastern Gulf of Maine  

E-Print Network [OSTI]

VARIABILITY OF BOTTOM WATER DOMES AND GEOSTROPHIC CURRENTS IN THE EASTERN GULF OF MAINE A Thesis by ERIK SAUL GQTTLIEB Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1987 Major Subject: Oceanography VARIABILITY OF BOTTOM WATER DOMES AND GEOSTROPHIC CURRENTS IN THE EASTERN GULF OF ~ A Thesis by ERIK SAUL GOTTLIEB Approved as to style and content by: Davi A. rooks (Chairman...

Gottlieb, Erik S

2012-06-07T23:59:59.000Z

133

THE ELM SURVEY. V. MERGING MASSIVE WHITE DWARF BINARIES  

SciTech Connect (OSTI)

We present the discovery of 17 low-mass white dwarfs (WDs) in short-period (P {<=} 1 day) binaries. Our sample includes four objects with remarkable log g {approx_equal} 5 surface gravities and orbital solutions that require them to be double degenerate binaries. All of the lowest surface gravity WDs have metal lines in their spectra implying long gravitational settling times or ongoing accretion. Notably, six of the WDs in our sample have binary merger times <10 Gyr. Four have {approx}>0.9 M{sub Sun} companions. If the companions are massive WDs, these four binaries will evolve into stable mass transfer AM CVn systems and possibly explode as underluminous supernovae. If the companions are neutron stars, then these may be millisecond pulsar binaries. These discoveries increase the number of detached, double degenerate binaries in the ELM Survey to 54; 31 of these binaries will merge within a Hubble time.

Brown, Warren R.; Kenyon, Scott J. [Smithsonian Astrophysical Observatory, 60 Garden St, Cambridge, MA 02138 (United States); Kilic, Mukremin; Gianninas, A. [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, OK, 73019 (United States); Allende Prieto, Carlos, E-mail: wbrown@cfa.harvard.edu, E-mail: skenyon@cfa.harvard.edu, E-mail: kilic@ou.edu, E-mail: alexg@nhn.ou.edu, E-mail: callende@iac.es [Instituto de Astrofisica de Canarias, E-38205, La Laguna, Tenerife (Spain)

2013-05-20T23:59:59.000Z

134

Phenomenological gravitational waveforms from spinning coalescing binaries  

E-Print Network [OSTI]

An accurate knowledge of the coalescing binary gravitational waveform is crucial for experimental searches as the ones performed by the LIGO-Virgo collaboration. Following an earlier paper by the same authors we refine the construction of analytical phenomenological waveforms describing the signal sourced by generically spinning binary systems. The gap between the initial inspiral part of the waveform, described by spin-Taylor approximants, and its final ring-down part, described by damped exponentials, is bridged by a phenomenological phase calibrated by comparison with the dominant spherical harmonic mode of a set of waveforms including both numerical and phenomenological waveforms of different type. All waveforms considered describe equal mass systems. The Advanced LIGO noise-weighted overlap integral between the numerical and phenomenological waveforms presented here ranges between 0.95 and 0.99 for a wide span of mass values.

R. Sturani; S. Fischetti; L. Cadonati; G. M. Guidi; J. Healy; D. Shoemaker; A. Vicere'

2011-06-23T23:59:59.000Z

135

Recent observational progress in AM CVn binaries  

E-Print Network [OSTI]

We present the results of some recent research on AM CVn systems. We present: X-ray/UV observations made using XMM-Newton; the X-ray grating spectrum of RX J1914+24; preliminary results of a search for radio emission from AM CVn binaries, and discuss the strategy and first results of the RATS project, whose main aim is to discover AM CVn systems.

G. Ramsay; C. Brocksopp; P. Groot; P. Hakala; H. Lehto; T. Marsh; R. Napiwotzki; G. Nelemans; S. Potter; B. Slee; D. Steeghs; K. Wu

2006-10-12T23:59:59.000Z

136

The binary fraction of extreme horizontal branch stars  

E-Print Network [OSTI]

(Abbreviated) We have used precise radial velocity measurements of subdwarf-B stars from the Palomar-Green catalogue to look for binary extreme horizontal branch (EHB) stars. We identify 36 EHB stars in our sample and find that at least 21 of these stars are binaries. All but one or two of these are new identifications. The minimum binary fraction for EHB stars implied by our survey is 60+-8%. Our survey is sensitive to binaries with orbital periods P less than about 10d. For reasonable assumptions concerning the period distribution and the mass ratio distribution of the binaries, we find that the mean detection efficiency of our survey over this range of orbital periods is 87%. Allowing for this estimated detection efficiency, the fraction of EHB stars which are short-period binaries ($0.03 < P <10d, approximately) is 69+-9%. The value is not strongly dependent on the period distribution below P=10d or the mean companion mass for these short-period binaries. The orbital separation of the stars in these binaries is much less than the size of the red giant from which the EHB star has formed. This is strong evidence that binary star evolution is fundamental to the formation of the majority of EHB stars. If there are also binary EHB stars whose orbital periods are more than about 10d, the fraction of EHB stars whose evolution has been affected by the presence of a companion may be much higher.

P. F. L. Maxted; U. Heber; T. R. Marsh; R. C. North

2001-03-21T23:59:59.000Z

137

Gravitational lensing in eclipsing binary stars  

E-Print Network [OSTI]

I consider the effect of the gravitational deflection of light upon the light curves of eclipsing binary stars, focussing mainly upon systems containing at least one white dwarf component. In absolute terms the effects are small, however they are strongest at the time of secondary eclipse when the white dwarf transits its companion, and act to reduce the depth of this feature. If not accounted for, this may lead to under-estimation of the radius of the white dwarf compared to that of its companion. I show that the effect is significant for plausible binary parameters, and that it leads to ~25% reduction in the transit depth in the system KPD 1930+2752. The reduction of eclipse depth is degenerate with the stellar radius ratio, and therefore cannot be used to establish the existence of lensing. A second order effect of the light bending is to steepen the ingress and egress features of the secondary eclipse relative to the primary eclipse, although it will be difficult to see this in practice. I consider also binaries containing neutron stars and black-holes. I conclude that, although relatively large effects are possible in such systems, a combination of rarity, faintness and intrinsic variability make it unlikely that lensing will be detectable in them.

T. R. Marsh

2000-12-18T23:59:59.000Z

138

WIPP Safety Is Paramount Top to Bottom, Literally | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

WIPP Safety Is Paramount Top to Bottom, Literally WIPP Safety Is Paramount Top to Bottom, Literally WIPP Safety Is Paramount Top to Bottom, Literally March 28, 2013 - 12:00pm Addthis WIPP surface maintenance employees tail a new steel head rope over the hoist drum. The hoist is used to transport TRU waste 2,150 underground for final disposal. WIPP surface maintenance employees tail a new steel head rope over the hoist drum. The hoist is used to transport TRU waste 2,150 underground for final disposal. The WIPP shaft crew installs rigging onto a new 2,300-foot-long head rope on the first floor. The WIPP shaft crew installs rigging onto a new 2,300-foot-long head rope on the first floor. WIPP surface maintenance employees tail a new steel head rope over the hoist drum. The hoist is used to transport TRU waste 2,150 underground for final disposal.

139

A binary LP model to the facility layout problem Abstract  

E-Print Network [OSTI]

Such locations will influence material handling or distance costs and ..... binary row) and select the location which will be placed (based on the lowest value in...

Cpu

2002-04-04T23:59:59.000Z

140

DESTRUCTION OF BINARY MINOR PLANETS DURING NEPTUNE SCATTERING  

SciTech Connect (OSTI)

The existence of extremely wide binaries in the low-inclination component of the Kuiper Belt provides a unique handle on the dynamical history of this population. Some popular frameworks of the formation of the Kuiper Belt suggest that planetesimals were moved there from lower semimajor axis orbits by scattering encounters with Neptune. We test the effects such events would have on binary systems and find that wide binaries are efficiently destroyed by the kinds of scattering events required to create the Kuiper Belt with this mechanism. This indicates that a binary-bearing component of the cold Kuiper Belt was emplaced through a gentler mechanism or was formed in situ.

Parker, Alex H. [Department of Astronomy, University of Victoria, BC (Canada); Kavelaars, J. J., E-mail: alexhp@uvic.c [Herzberg Institute of Astrophysics, National Research Council of Canada (Canada)

2010-10-20T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Oscillating red-giant stars in eccentric binary systems  

E-Print Network [OSTI]

The unparalleled photometric data obtained by NASA's Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like oscillating red-giant primary component. We also report several new binary systems that are candidates for hosting an oscillating companion. A powerful approach to study binary stars is to combine asteroseimic techniques with light curve fitting. Seismology allows us to deduce the properties of red giants. In addition, by modeling the ellipsoidal modulations we can constrain the parameters of the binary system. An valuable independent source are ground-bases, high-resolution spectrographs.

Beck, P G; Vos, J; Kallinger, T; Garcia, R A; Mathur, S; Houmani, K

2014-01-01T23:59:59.000Z

142

The performance of a simulated fractured matrix reservoir subject to a bottom-water drive  

E-Print Network [OSTI]

. It is thought that the flooding of a fractured matr ix reservoir may not, recover much of the oil because the water would move through the fracture and there would, be an early breakthrough of the water . Yet this has not been demonstrated for a bottom...-water dr ive, A model to represent one element of a frac- tured matrix reservoir was constructed. , The model was positioned vertically and. water was injected at a constant rate in the bottom and. oil was produced from the top of the model...

Yazdi, Mojtaba

1973-01-01T23:59:59.000Z

143

Analysis of fish bycatch and observer effect within the New Zealand ling bottom long-lining commercial fishery.  

E-Print Network [OSTI]

??This research aims to make a contribution to management of the ling bottom long-line (BLL) fishery by: - providing improved understanding of fish bycatch in (more)

Burns, R. J.

2005-01-01T23:59:59.000Z

144

Nonlinear Tides in Close Binary Systems  

Science Journals Connector (OSTI)

We study the excitation and damping of tides in close binary systems, accounting for the leading-order nonlinear corrections to linear tidal theory. These nonlinear corrections include two distinct physical effects: three-mode nonlinear interactions, i.e., the redistribution of energy among stellar modes of oscillation, and nonlinear excitation of stellar normal modes by the time-varying gravitational potential of the companion. This paper, the first in a series, presents the formalism for studying nonlinear tides and studies the nonlinear stability of the linear tidal flow. Although the formalism we present is applicable to binaries containing stars, planets, and/or compact objects, we focus on non-rotating solar-type stars with stellar or planetary companions. Our primary results include the following: (1) The linear tidal solution almost universally used in studies of binary evolution is unstable over much of the parameter space in which it is employed. More specifically, resonantly excited internal gravity waves in solar-type stars are nonlinearly unstable to parametric resonance for companion masses M' 10-100 M ? at orbital periods P ? 1-10 days. The nearly static "equilibrium" tidal distortion is, however, stable to parametric resonance except for solar binaries with P 2-5 days. (2) For companion masses larger than a few Jupiter masses, the dynamical tide causes short length scale waves to grow so rapidly that they must be treated as traveling waves, rather than standing waves. (3) We show that the global three-wave treatment of parametric instability typically used in the astrophysics literature does not yield the fastest-growing daughter modes or instability threshold in many cases. We find a form of parametric instability in which a single parent wave excites a very large number of daughter waves (N ? 103[P/10 days] for a solar-type star) and drives them as a single coherent unit with growth rates that are a factor of ?N faster than the standard three-wave parametric instability. These are local instabilities viewed through the lens of global analysis; the coherent global growth rate follows local rates in the regions where the shear is strongest. In solar-type stars, the dynamical tide is unstable to this collective version of the parametric instability for even sub-Jupiter companion masses with P a month. (4) Independent of the parametric instability, the dynamical and equilibrium tides excite a wide range of stellar p-modes and g-modes by nonlinear inhomogeneous forcing; this coupling appears particularly efficient at draining energy out of the dynamical tide and may be more important than either wave breaking or parametric resonance at determining the nonlinear dissipation of the dynamical tide.

Nevin N. Weinberg; Phil Arras; Eliot Quataert; Josh Burkart

2012-01-01T23:59:59.000Z

145

TOP-DOWN/BOTTOM-UP APPROACH FOR DEVELOPING SUSTAINABLE DEVELOPMENT INDICATORS FOR MINING  

E-Print Network [OSTI]

: APPLICATION TO THE ARLIT URANIUM MINES (NIGER) A. Chamareta)b) , M. O'Connor a) and G. Récoché b) a, undertaken at the Arlit uranium mines in Niger. Our objective was to define indicators that are understood1 TOP-DOWN/BOTTOM-UP APPROACH FOR DEVELOPING SUSTAINABLE DEVELOPMENT INDICATORS FOR MINING

Paris-Sud XI, Université de

146

ORIGINAL PAPER Tomato fruit weight 11.3 maps close to fasciated on the bottom  

E-Print Network [OSTI]

ORIGINAL PAPER Tomato fruit weight 11.3 maps close to fasciated on the bottom of chromosome 11 online: 4 May 2011 ? Springer-Verlag 2011 Abstract Fruit weight is an important character in many crops. In tomato (Solanum lycopersicum), fruit weight is controlled by many loci, some of which have a major effect

van der Knaap, Esther

147

OVERLAP OF PREDICTED COLD-WATER CORAL HABITAT AND BOTTOM-CONTACT FISHERIES  

E-Print Network [OSTI]

and Environmental Management Project No. 476 © Jessica L. Finney 2009 SIMON FRASER UNIVERSITY Fall 2009 All rights of Resource Management Title of Thesis: Overlap of predicted cold-water coral habitat and bottom- contact School of Resource and Environmental Management Simon Fraser University

148

Harbor Branch researcher on top of bottom life ahead of oil spill  

E-Print Network [OSTI]

Harbor Branch researcher on top of bottom life ahead of oil spill By Ed Killer Saturday, June 12 like if touched by an underwater plume of oil. No doubt, much of it would be gone forever. Reed inhabiting the reefs, Reed hoped the oil would not be swept around the tip of Florida and onto the fragile

Belogay, Eugene A.

149

NATURE AND EXTENT OF FOULING OF SHIPS' BOTTOMS By J. PAUL VISSCHER  

E-Print Network [OSTI]

;194 BULLETIN OF THE BUREAU OF FISHERIES the effect of marine borers recently has been studied extensively additional. 4. Increase in wear and tear on machinery. 5. Necessity for dry docking, cleaning, and painting this the bottoms are exposed to view, either by the use of dry docks or marine railways. The former are of two

150

Hydrodynamics of high speed planing hulls with partially ventilated bottom and hydrofoils  

E-Print Network [OSTI]

The influence of a cambered shaped bottom step on the performance of sea going V-stepped planing hulls is investigated using numerical methods. The shape of the step was designed to decrease the Drag/Lift ratio of the hull ...

Sheingart, Zvi

2014-01-01T23:59:59.000Z

151

Sonar imaging of bay bottom sediments and anthropogenic impacts in Galveston Bay, Texas  

E-Print Network [OSTI]

Knowledge of surface sediment distribution in Galveston Bay is important because it allows us to better understand how the bay works and how human activities impact the bay and its ecosystems. In this project, six areas of bay bottom were surveyed...

Maddox, Donald Shea

2007-04-25T23:59:59.000Z

152

Two Paths to Transforming Markets through Public Sector Energy Efficiency: Bottom Up versus Top Down  

E-Print Network [OSTI]

Two Paths to Transforming Markets through Public Sector Energy Efficiency: Bottom Up versus Top National Laboratory (LBNL) Edgar Villaseñor Franco, Promoting an Energy-efficient Public Sector (PEPS (Promoting an Energy-efficient Public Sector) program, demonstrates the need for flexibility in designing

153

Analysis of core damage frequency from internal events: Peach Bottom, Unit 2  

SciTech Connect (OSTI)

This document contains the internal event initiated accident sequence analyses for Peach Bottom, Unit 2; one of the reference plants being examined as part of the NUREG-1150 effort by the Nuclear Regulatory Commission. NUREG-1150 will document the risk of a selected group of nuclear power plants. As part of that work, this report contains the overall core damage frequency estimate for Peach Bottom, Unit 2, and the accompanying plant damage state frequencies. Sensitivity and uncertainty analyses provided additional insights regarding the dominant contributors to the Peach Bottom core damage frequency estimate. The mean core damage frequency at Peach Bottom was calculated to be 8.2E-6. Station blackout type accidents (loss of all ac power) were found to dominate the overall results. Anticipated Transient Without Scram accidents were also found to be non-negligible contributors. The numerical results are largely driven by common mode failure probability estimates and to some extent, human error. Because of significant data and analysis uncertainties in these two areas (important, for instance, to the most dominant scenario in this study), it is recommended that the results of the uncertainty and sensitivity analyses be considered before any actions are taken based on this analysis.

Kolaczkowski, A.M.; Lambright, J.A.; Ferrell, W.L.; Cathey, N.G.; Najafi, B.; Harper, F.T.

1986-10-01T23:59:59.000Z

154

DESIGN AND EVALUATION OF A SAMPLER FOR MEASURING THE NEAR-BOTTOM VERTICAL DISTRIBUTION OF  

E-Print Network [OSTI]

DESIGN AND EVALUATION OF A SAMPLER FOR MEASURING THE NEAR-BOTTOM VERTICAL DISTRIBUTION OF PINK distribution of shrimp was considered essential to the design of an effective shrimp trawl since the vertical. Subsequently a multipurpose shrimp sampler was designed to facilitate investigation of shrimp distributions

155

Using MAS Technologies for Intelligent Organizations: A Report of Bottom-Up Results  

E-Print Network [OSTI]

Using MAS Technologies for Intelligent Organizations: A Report of Bottom-Up Results Armando Robles1 Organizations us- ing MAS Technology. We discuss our experience of implementing different types of server agents institutional prescription, and having that prescription control the information system that handles the day

Luck, Michael

156

Programmable Self-Assembly Control of Concurrent Systems From the Bottom Up  

E-Print Network [OSTI]

Programmable Self-Assembly Control of Concurrent Systems From the Bottom Up Eric Klavins Self-assembly. Self-assembly is ubiquitous in nature. For example, virus capsids, cell membranes, and tissues are all self-assembled from smaller com- ponents in a completely distributed fashion. Self-assembly

157

Recent Bottom Water Warming in the Pacific Ocean* GREGORY C. JOHNSON  

E-Print Network [OSTI]

Recent Bottom Water Warming in the Pacific Ocean* GREGORY C. JOHNSON NOAA/Pacific Marine Environmental Laboratory Contribution Number 3037. Corresponding author address: Gregory C. Johnson, NOAA-mail: gregory.c.johnson@noaa.gov 1 NOVEMBER 2007 J O H N S O N E T A L . 5365 DOI: 10.1175/2007JCLI1879.1 © 2007

Johnson, Gregory C.

158

Abstract--Three aspects of a survey bottom trawl performance--1) trawl  

E-Print Network [OSTI]

- ronmental conditions. Variables such as surface and bottom currents, sea state, wind direction, varying sub- strate types and inclinations, and depth of tow may all contribute to dif- ferences in gear efficiency. Other than by controlling towing speed and direction, these surveys are unable to compensate

159

E-Print Network 3.0 - accuracy binary black Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

binary search tree with one extra bit of storage per node... of the tree. A binary search tree is a ... Source: Belohlavek, Radim - Department of Computer Science, Palack...

160

Binary Black Hole Accretion Flows From a Misaligned Circumbinary Disk  

Science Journals Connector (OSTI)

......mass-accretion-rate variation per binary...because each black hole passes across the circumbinary...mass-accretion-rate variation per binary...holes|black hole physics|Galaxies: nuclei...because each black hole passes across the circumbinary...the mass accretion rates is also independent......

Kimitake Hayasaki; Hideki Saito; Shin Mineshige

2013-08-25T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

k-PROTECTED VERTICES IN BINARY SEARCH TREES MIKLOS BONA  

E-Print Network [OSTI]

k-PROTECTED VERTICES IN BINARY SEARCH TREES MIKL´OS B´ONA Abstract. We show that for every k, the probability that a randomly selected vertex of a random binary search tree on n nodes is at distance k - 1. In another model, leaves may represent end-users (customers) of a company, and in that case, it may

Bona, Miklos

162

Layered Binary-Dielectrics for Energy Applications: Limitations and Potentials  

SciTech Connect (OSTI)

In this Letter, an attempt is made to illustrate how performance of an electrically insulating material, a dielectric, can be improved by constructing a layered binary-dielectric structure that employs a weak insulator with high dielectric permittivity. It is shown that layered binary-dielectrics could have a signicant impact on energy storage and electrical insulation.

Tuncer, Enis [ORNL

2012-01-01T23:59:59.000Z

163

On Binary Methods Kim Bruce, Luca Cardelli, Giuseppe Castagna,  

E-Print Network [OSTI]

On Binary Methods Kim Bruce, Luca Cardelli, Giuseppe Castagna, The Hopkins Objects Group, Gary T 50011­1040, USA #12; On Binary Methods Kim Bruce \\Lambda Department of Computer Science, Williams­ dations of Object­Oriented Languages, which was spon­ sored by NSF and ESPRIT and held in Paris in June

Trifonov, Valery

164

Surface tension in a reactive binary mixture of incompressible fluids  

E-Print Network [OSTI]

Surface tension in a reactive binary mixture of incompressible fluids Henning Struchtrup Institute with a distributed form of surface tension. The model describes chemistry, diffusion, viscosity and heat transfer tension at the front. Keywords: Binary mixtures, Surface tension, Irreversible thermodynamics, Hele

Struchtrup, Henning

165

ccsd00004127, ON THE SURFACE TENSIONS OF BINARY MIXTURES  

E-Print Network [OSTI]

ccsd­00004127, version 1 ­ 2 Feb 2005 ON THE SURFACE TENSIONS OF BINARY MIXTURES JEAN RUIZ Abstract tensions and the concentrations are brie y reviewed. Key Words: Surface tensions, binary mixtures the corresponding surface tension depends on the composition of the mixture. Some relationship is expected which

166

Note on the size of binary Armstrong codes Aart Blokhuis  

E-Print Network [OSTI]

Note on the size of binary Armstrong codes Aart Blokhuis , Andries Brouwer, Attila Sali April 19, 2012 Abstract We show for binary Armstrong codes Arm(2, k, n) that asymptotically n/k 1.224, while) for all admissible n. Keywords: coding theory; databases; Armstrong codes AMS subject classification: 94B

Brouwer, Andries E.

167

Note on the size of binary Armstrong codes Aart Blokhuis  

E-Print Network [OSTI]

Note on the size of binary Armstrong codes Aart Blokhuis , Andries Brouwer, Attila Sali February 20, 2012 Abstract We show for binary Armstrong codes Arm(2, k, n) that asymptotically n/k 1.224, while) for all admissible n. Keywords: coding theory; databases; Armstrong codes AMS subject classification: 94B

Brouwer, Andries E.

168

Modeling Spatial-Temporal Binary Data Using Markov Random Fields  

E-Print Network [OSTI]

Modeling Spatial-Temporal Binary Data Using Markov Random Fields Jun Zhu Department of Statistics to the autologistic model for spatial-temporal binary data. The model we propose is a Markov chain across time, where discuss the generality of our approach for modeling other types of spatial-temporal lattice data. Keywords

Huang, Su-Yun

169

A Combined Decimal and Binary Floating-point Divider  

E-Print Network [OSTI]

to most recent decimal divider designs, which are based on the Binary Coded Decimal (BCD) encoding, our Integer Decimal (BID) encoding. DPD is a compressed form of the Binary Coded Decimal (BCD) encoding on the BCD encoding [3],[4],[5], using the DPD encoding for floating-point and the BCD encoding for fixed

Nannarelli, Alberto

170

Advanced binary cycles: Optimum working fluids  

SciTech Connect (OSTI)

A computer model (Cycle Analysis Simulation Tool, CAST) and a methodology have been developed to perform value analysis for small, low- to moderate-temperature binary geothermal power plants. The value analysis method allows for incremental changes in the levelized electricity cost (LEC) to be determined between a baseline plant and a modified plant. Thermodynamic cycle analyses and component sizing are carried out in the model followed by economic analysis which provides LEC results. The emphasis of the present work is on evaluating the effect of mixed working fluids instead of pure fluids on the LEC of a geothermal binary plant that uses a simple Organic Rankine Cycle. Four resources were studied spanning the range of 265 F to 375 F. A variety of isobutane and propane based mixtures, in addition to pure fluids, were used as working fluids. This study shows that the use of propane mixtures at a 265 F resource can reduce the LEC by 24% when compared to a base case value that utilizes commercial isobutane as its working fluid. The cost savings drop to 6% for a 375 F resource, where an isobutane mixture is favored. Supercritical cycles were found to have the lowest cost at all resources.

Gawlik, K.; Hassani, V. [National Renewable Energy Lab., Golden, CO (United States)

1997-12-31T23:59:59.000Z

171

Thermodynamics of magnetized binary compact objects  

SciTech Connect (OSTI)

Binary systems of compact objects with electromagnetic field are modeled by helically symmetric Einstein-Maxwell spacetimes with charged and magnetized perfect fluids. Previously derived thermodynamic laws for helically symmetric perfect-fluid spacetimes are extended to include the electromagnetic fields, and electric currents and charges; the first law is written as a relation between the change in the asymptotic Noether charge {delta}Q and the changes in the area and electric charge of black holes, and in the vorticity, baryon rest mass, entropy, charge and magnetic flux of the magnetized fluid. Using the conservation laws of the circulation of magnetized flow found by Bekenstein and Oron for the ideal magnetohydrodynamic fluid, and also for the flow with zero conducting current, we show that, for nearby equilibria that conserve the quantities mentioned above, the relation {delta}Q=0 is satisfied. We also discuss a formulation for computing numerical solutions of magnetized binary compact objects in equilibrium with emphasis on a first integral of the ideal magnetohydrodynamic-Euler equation.

Uryu, Koji [Department of Physics, University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213 (Japan); Gourgoulhon, Eric [Laboratoire Univers et Theories, UMR 8102 du CNRS, Observatoire de Paris, Universite Paris Diderot, F-92190 Meudon (France); Markakis, Charalampos [Department of Physics, University of Wisconsin-Milwaukee, Post Office Box 413, Milwaukee, Wisconsin 53201 (United States)

2010-11-15T23:59:59.000Z

172

Binary classification of items of interest in a repeatable process  

DOE Patents [OSTI]

A system includes host and learning machines in electrical communication with sensors positioned with respect to an item of interest, e.g., a weld, and memory. The host executes instructions from memory to predict a binary quality status of the item. The learning machine receives signals from the sensor(s), identifies candidate features, and extracts features from the candidates that are more predictive of the binary quality status relative to other candidate features. The learning machine maps the extracted features to a dimensional space that includes most of the items from a passing binary class and excludes all or most of the items from a failing binary class. The host also compares the received signals for a subsequent item of interest to the dimensional space to thereby predict, in real time, the binary quality status of the subsequent item of interest.

Abell, Jeffrey A.; Spicer, John Patrick; Wincek, Michael Anthony; Wang, Hui; Chakraborty, Debejyo

2014-06-24T23:59:59.000Z

173

A Flashing Binary Combined Cycle For Geothermal Power Generation | Open  

Open Energy Info (EERE)

Flashing Binary Combined Cycle For Geothermal Power Generation Flashing Binary Combined Cycle For Geothermal Power Generation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Flashing Binary Combined Cycle For Geothermal Power Generation Details Activities (0) Areas (0) Regions (0) Abstract: The performance of a flashing binary combined cycle for geothermal power generation is analysed. It is proposed to utilize hot residual brine from the separator in flashing-type plants to run a binary cycle, thereby producing incremental power. Parametric variations were carried out to determine the optimum performance of the combined cycle. Comparative evaluation with the simple flashing plant was made to assess its thermodynamic potential and economic viability. Results of the analyses indicate that the combined cycle can generate 13-28% more power than the

174

Geology of the hydrothermal field at 26 [degrees] N, Mid-Atlantic Ridge: interpretations from ocean-bottom photography  

E-Print Network [OSTI]

, seismics, magnetics, gravity, bottom sampling, and bottom photography. Studies of the MAR between 47'-51'N (Johnson and Vogt, 1973), at 45'N (Aumento and others, 1971), and between 22'- 23'N (van Andel and. Bowin, 1968) have determined the gross...

Temple, Darcy Merideth Goode

1977-01-01T23:59:59.000Z

175

Boussinesq systems in two space dimensions over a variable bottom for the generation and propagation of tsunami waves  

E-Print Network [OSTI]

Boussinesq systems in two space dimensions over a variable bottom for the generation.R.T.H., P.O. Box 1527, 71110 Heraklion, Greece Abstract Considered here are Boussinesq systems of equations of surface water wave theory over a variable bottom. A simplified such Boussinesq system is derived

Paris-Sud XI, Université de

176

UBC Social Ecological Economic Development Studies (SEEDS) Student Report Triple bottom line assessment of transport options for the UBC farm  

E-Print Network [OSTI]

UBC Social Ecological Economic Development Studies (SEEDS) Student Report Triple bottom line and analyzes viable vehicle options to be used at the UBC Farm using Triple bottom line assessment. These options include powering the vehicle with the traditional fossil fuels, natural gas, biodiesel, or use

177

ADCP backscatter measurements in the northeastern Gulf of Mexico: comparison of near-surface with near-bottom biological backscatter  

E-Print Network [OSTI]

. Also investigated is ABI from near-bottom scatterers during the Deep Gulf of Mexico Benthic Ecology study (DGoMB). Four near-bottom deployments of a 300kHz ADCP in depths ranging from 755 to 2740 m were made in June 2001 each for 1-2 days. A fifth...

Sindlinger, Laurie R

2012-06-07T23:59:59.000Z

178

Bottom Frame  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

X-ray Absorption Spectroscopy at SSRL X-ray Absorption Spectroscopy at SSRL Welcome to the home page of the Structural Molecular Biology/X-ray Absorption Spectroscopy Group at Stanford Synchrotron Radiation Laboratory. The SMB/XAS group develops methodology and instrumentation, and provides a wide array of equipment, software and services/support for x-ray absorption spectroscopy users at SSRL. Scientific focus is on dilute metalloprotein XAS, microbeam imaging/XAS, low-Z XAS (S and Cl etc.), and polarized single crystal XAS studies, for which specialized facilities are made available. Equipment ranges from advanced solid-state array x-ray fluorescence detector systems, liquid-He cryostats and capillary/ K-B optic micro-XAS instrumentation to wet-laboratory facilities. Software provided by the

179

Automated analysis of eclipsing binary lightcurves. I. EBAS -- a new Eclipsing Binary Automated Solver with EBOP  

E-Print Network [OSTI]

We present a new algorithm -- Eclipsing Binary Automated Solver (EBAS), to analyse lightcurves of eclipsing binaries. The algorithm is designed to analyse large numbers of lightcurves, and is therefore based on the relatively fast EBOP code. To facilitate the search for the best solution, EBAS uses two parameter transformations. Instead of the radii of the two stellar components, EBAS uses the sum of radii and their ratio, while the inclination is transformed into the impact parameter. To replace human visual assessment, we introduce a new 'alarm' goodness-of-fit statistic that takes into account correlation between neighbouring residuals. We perform extensive tests and simulations that show that our algorithm converges well, finds a good set of parameters and provides reasonable error estimation.

Omer Tamuz; Tsevi Mazeh; Pierre North

2006-01-10T23:59:59.000Z

180

From binary breakup to multifragmentation: Computer simulation  

Science Journals Connector (OSTI)

A semiclassical model developed for the computer simulation of nuclear reactions is applied to the problem of fragmentation in proton and heavy ion induced reactions. Simulations based on the model are used to follow the time evolution of the reactions in both coordinate and phase space as well as to calculate correlations for quantities such as fragment positions and masses. Three reactions are selected for detailed study: p+Ag at 300 MeV, and Ca+Ca at 25 and 50 MeV/nucleon bombarding energy. It is shown that the behavior expected for these reactions from the mechanical instability properties of nuclear matter is supported by the simulations. An experimental measure of the change from binary breakup to multifragmentation is shown to be the two-particle correlation function in mass.

David H. Boal and James N. Glosli

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Mapping the peculiar binary GP Com  

E-Print Network [OSTI]

We present high resolution spectra of the AM CVn helium binary GP Com at two different wavelength ranges. The spectra show the same flaring behaviour observed in previous UV and optical data. We find that the central spike contributes to the flare spectra indicating that its origin is probably the compact object. We also detect that the central spike moves with orbital phase following an S-wave pattern. The radial velocity semiamplitude of the S-wave is \\~10 km/s which indicates its origin is near the centre of mass of the system, which in this case lies very close to the white dwarf. The Stark effect seems to affect significantly the central spike of some of the lines suggesting that it forms in a high electron density region. This again favours the idea that the central spike originates in the white dwarf. We present Doppler maps obtained for the emission lines which show three clear emission regions.

L. Morales-Rueda; T. R. Marsh; R. C. North

2000-08-29T23:59:59.000Z

182

NONLINEAR TIDES IN CLOSE BINARY SYSTEMS  

SciTech Connect (OSTI)

We study the excitation and damping of tides in close binary systems, accounting for the leading-order nonlinear corrections to linear tidal theory. These nonlinear corrections include two distinct physical effects: three-mode nonlinear interactions, i.e., the redistribution of energy among stellar modes of oscillation, and nonlinear excitation of stellar normal modes by the time-varying gravitational potential of the companion. This paper, the first in a series, presents the formalism for studying nonlinear tides and studies the nonlinear stability of the linear tidal flow. Although the formalism we present is applicable to binaries containing stars, planets, and/or compact objects, we focus on non-rotating solar-type stars with stellar or planetary companions. Our primary results include the following: (1) The linear tidal solution almost universally used in studies of binary evolution is unstable over much of the parameter space in which it is employed. More specifically, resonantly excited internal gravity waves in solar-type stars are nonlinearly unstable to parametric resonance for companion masses M' {approx}> 10-100 M{sub Circled-Plus} at orbital periods P Almost-Equal-To 1-10 days. The nearly static 'equilibrium' tidal distortion is, however, stable to parametric resonance except for solar binaries with P {approx}< 2-5 days. (2) For companion masses larger than a few Jupiter masses, the dynamical tide causes short length scale waves to grow so rapidly that they must be treated as traveling waves, rather than standing waves. (3) We show that the global three-wave treatment of parametric instability typically used in the astrophysics literature does not yield the fastest-growing daughter modes or instability threshold in many cases. We find a form of parametric instability in which a single parent wave excites a very large number of daughter waves (N Almost-Equal-To 10{sup 3}[P/10 days] for a solar-type star) and drives them as a single coherent unit with growth rates that are a factor of Almost-Equal-To N faster than the standard three-wave parametric instability. These are local instabilities viewed through the lens of global analysis; the coherent global growth rate follows local rates in the regions where the shear is strongest. In solar-type stars, the dynamical tide is unstable to this collective version of the parametric instability for even sub-Jupiter companion masses with P {approx}< a month. (4) Independent of the parametric instability, the dynamical and equilibrium tides excite a wide range of stellar p-modes and g-modes by nonlinear inhomogeneous forcing; this coupling appears particularly efficient at draining energy out of the dynamical tide and may be more important than either wave breaking or parametric resonance at determining the nonlinear dissipation of the dynamical tide.

Weinberg, Nevin N. [Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Arras, Phil [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Quataert, Eliot; Burkart, Josh, E-mail: nevin@mit.edu [Astronomy Department and Theoretical Astrophysics Center, 601 Campbell Hall, University of California, Berkeley, CA 94720 (United States)

2012-06-01T23:59:59.000Z

183

The binary properties of the pulsating subdwarf B eclipsing binary PG 1336-018 (NY Vir)  

E-Print Network [OSTI]

We present an unbiased orbit solution and mass determination of the components of the eclipsing binary NY Vir as a critical test for the formation scenarios of subdwarf B stars. We obtained high-resolution time series VLT/UVES spectra and high-speed multicolour VLT/ULTRACAM photometric observations of NY Vir, a rapidly pulsating subdwarf B star in a short period eclipsing binary. Combining the radial velocity curve obtained from the VLT/UVES spectra with the VLT/ULTRACAM multicolour lightcurves, we determined numerical orbital solutions for this eclipsing binary. Due to the large number of free parameters and their strong correlations, no unique solution could be found, only families of solutions. We present three solutions of equal statistical significance, two of which are compatible with the primary having gone through a core He-flash and a common-envelope phase described by the $\\alpha$-formalism. These two models have an sdB primary of 0.466 \\msol and 0.389 \\msol, respectively. Finally, we report the detection of the Rossiter-McLaughlin effect for NY Vir.

M. Vu?kovi?; C. Aerts; R. stensen; G. Nelemans; H. Hu; C. S. Jeffery; V. S. Dhillon; T. R. Marsh

2007-06-22T23:59:59.000Z

184

EDS Coal Liquefaction Process Development. Phase V. Laboratory evaluation of the characteristics of EDS Illinois bottoms  

SciTech Connect (OSTI)

This interim report documents work carried out by Combustion Engineering, Inc. under a contract to Exxon Research and Engineering Company to develop a conceptual Hybrid Boiler design fueled by the vacuum distillation residue (vacuum bottoms) derived from Illinois No. 6 coal in the EDS Coal Liquefaction Process. This report was prepared by Combustion Engineering, Inc., and is the first of two reports on the predevelopment phase of the Hybrid Boiler program. This report covers the results of a laboratory investigation to assess the fuel and ash properties of EDS vacuum bottoms. The results of the laboratory testing reported here were used in conjunction with Combustion Engineering's design experience to predict fuel performance and to develop appropriate boiler design parameters. These boiler design parameters were used to prepare the engineering design study reported in EDS Interim Report FE-2893-113, the second of the two reports on the predevelopment phase of the Hybrid Boiler Program. 46 figures, 29 tables.

Lao, T C; Levasseur, A A

1984-02-01T23:59:59.000Z

185

Variability of bottom nepheloid layers near the Flower Garden Banks, Gulf of Mexico  

E-Print Network [OSTI]

1981 PHISH profiles. A) Profile 13S, B) Profile 17S. . . . . . . 36 LIST OP FIGURES (cont) 15 Transmissivity versus SpM concentration determined from samples taken at the bottom of PHZSH casts from stations near the East and West Plower Garden... contained a greater concentration of SPM in PHISH profiles collected near the East Flower Garden (particularly the east side), west of the West Flower Garden, and north of the banks. All BNLs were a variation of a basic profile structure. Models...

Cecil, Thomas Martin

1983-01-01T23:59:59.000Z

186

Resummed Higgs $p_T$ distribution at NNLL + NNLO in bottom-quark annihilation  

E-Print Network [OSTI]

The resummed transverse-momentum distribution for Higgs bosons produced via bottom-quark annihilation at the LHC is presented. Our results are obtained in the five-flavor scheme to NNLO+NNLL accuracy. We present a theoretical prediction which consistently matches the cross section at small and large transverse momenta. Theoretical uncertainties are derived from a variation of the unphysical scales entering the calculation. Their size is significantly reduced with respect to lower orders.

Harlander, Robert; Wiesemann, Marius

2014-01-01T23:59:59.000Z

187

Resummed Higgs $p_T$ distribution at NNLL + NNLO in bottom-quark annihilation  

E-Print Network [OSTI]

The resummed transverse-momentum distribution for Higgs bosons produced via bottom-quark annihilation at the LHC is presented. Our results are obtained in the five-flavor scheme to NNLO+NNLL accuracy. We present a theoretical prediction which consistently matches the cross section at small and large transverse momenta. Theoretical uncertainties are derived from a variation of the unphysical scales entering the calculation. Their size is significantly reduced with respect to lower orders.

Robert Harlander; Anurag Tripathi; Marius Wiesemann

2014-07-11T23:59:59.000Z

188

Collision of two identical hypersonic stellar winds in binary systems  

E-Print Network [OSTI]

We investigate the hydrodynamics of two identical hypersonic stellar winds in a binary system. The interaction of these winds manifests itself in the form of two shocks and a contact surface between them. We neglect the binary rotation and assume that the gas flow ahead of the shocks is spherically symmetrical. In this case the contact surface that separates the gas emanated from the different stars coincides with the midplane of the binary components. In the shock the gas is heated and flows away nearly along the contact surface. We find the shock shape and the hot gas parameters in the shock layer between the shock and the contact surface.

Nikolay N. Pilyugin; Vladimir V. Usov

2006-10-13T23:59:59.000Z

189

Collision of two identical hypersonic stellar winds in binary systems  

E-Print Network [OSTI]

We investigate the hydrodynamics of two identical hypersonic stellar winds in a binary system. The interaction of these winds manifests itself in the form of two shocks and a contact surface between them. We neglect the binary rotation and assume that the gas flow ahead of the shocks is spherically symmetrical. In this case the contact surface that separates the gas emanated from the different stars coincides with the midplane of the binary components. In the shock the gas is heated and flows away nearly along the contact surface. We find the shock shape and the hot gas parameters in the shock layer between the shock and the contact surface.

Pilyugin, N N; Pilyugin, Nikolay N.; Usov, Vladimir V.

2006-01-01T23:59:59.000Z

190

Light and Life: Exotic Photosynthesis in Binary Star Systems  

E-Print Network [OSTI]

The potential for hosting photosynthetic life on Earth-like planets within binary/multiple stellar systems was evaluated by modelling the levels of photosynthetically active radiation (PAR) such planets receive. Combinations of M and G stars in: (i) close-binary systems; (ii) wide-binary systems and (iii) three-star systems were investigated and a range of stable radiation environments found to be possible. These environmental conditions allow for the possibility of familiar, but also more exotic forms of photosynthetic life, such as infrared photosynthesisers and organisms specialised for specific spectral niches.

O'Malley-James, J T; Cockell, C S; Greaves, J S

2011-01-01T23:59:59.000Z

191

Optimizing artificial lift operations through the use of wireless conveyed real time bottom hole data  

SciTech Connect (OSTI)

The use of an innovative wireless bottom hole pressure/temperature telemetry acquisition system in artificial lift operations can dramatically improve efficiency and optimize fluid producing rates in those wells. The tool is installed into the producing well in the vicinity of the perforations, measuring and transmitting the producing bottom hole pressures and temperatures to the surface for instantaneous control of the surface pumping motor speed. This insures the lowest possible fluid level back pressures, thus allowing for the highest possible fluid entry into the wellbore from that reservoir`s capacity. Operating costs per barrel are lowered since the maximum oil production can now be realized from existing wells. The telemetry tool is deployed with standard slickline equipment and is installed inside a well in a manner similar to ordinary pressure recorder tools. Several unique advantages of the tool are: (1) no moving parts; (2) no wireline to the surface; (3) real time measurement of bottom hole data; and (4) slickline retrievable. Future versions of the acquisition system tool will improve operating efficiency in the following ways: (1) Temperature monitoring and control of perforation scaling, tubular waxing, and tubular hydrating plugs. (2) Provide data necessary to create diagnostically predictive IPR curves through monitoring of reservoir in-flow rates. (3) Enabling early warning of water encroachment or lensing through fluid resistivity monitoring.

Campbell, B.; MacKinnon, J.; Bandy, T.R.; Hampton, T.

1996-12-31T23:59:59.000Z

192

The Laconia, New Hampshire Bottom, Ashi Paving Project. Volume 1: Environmental testing report  

SciTech Connect (OSTI)

Bottom ash is the principal waste stream fro m the combustion of municipal solid waste (MSW). It is comprised of grate ash (97%), the slag material discharged at the end of the grate system and grate sffting (3%), the material that melts or falls through the grate structure. This project was conducted to demonstrate the feasibility of using municipal solid waste grate ash as an aggregate substitute in the construction of a pavement binder course for a portion of Rt. 3 in Laconia, New Hampshire. The research was conducted over a two year period during 1993 and 1994. This study is the culmination of an earlier two year characterization study between 1990 and 1992 that documented the physical and environmental characteristics of the bottom ash as it was produced at the Concord, N.H. waste-to-energy (WTE) facility and used in an asphaltic binder course. Together, these two studies provide a complete evaluation of the potential for using grate ash or bottom ash in asphalt binder course or as recycled asphalt pavement (RAP) in base courses in pavements.

NONE

1996-03-01T23:59:59.000Z

193

Construction of an embankment with a fly and bottom ash mixture: field performance study  

SciTech Connect (OSTI)

Fly ash and bottom ash are coal combustion by-products (CCBPs) that are generated in large quantities throughout the world. It is often economical to dispose ash as mixtures rather than separately; that notwithstanding, only a few studies have been performed to investigate the behavior of fly and bottom ash mixtures, particularly those with high contents of fly ash. Also, there is very limited data available in the literature on the field performance of structures constructed using ash mixtures. This paper describes the construction and the instrumentation of a demonstration embankment built with an ash mixture (60:40 by weight of fly ash:bottom ash) on State Road 641, Terre Haute, Ind. Monitoring of the demonstration embankment was conducted for a period of 1 year from the start of construction of the embankment. The settlement of the embankment stabilized approximately 5 months after the end of its construction. According to horizontal inclinometer readings, the differential settlement at the top of the embankment is about 5 mm. Results from field quality control tests performed during construction of the demonstration embankment and monitoring data from vertical and horizontal inclinometers and settlement plates indicate that the ash mixture investigated can be considered an acceptable embankment construction material.

Yoon, S.; Balunaini, U.; Yildirim, I.Z.; Prezzi, M.; Siddiki, N.Z. [Louisiana Transportation Research Center, Baton Rouge, LA (United States)

2009-06-15T23:59:59.000Z

194

Nanomaterial processing using self-assembly-bottom-up chemical and biological approaches  

Science Journals Connector (OSTI)

Nanotechnology is touted as the next logical sequence in technological evolution. This has led to a substantial surge in research activities pertaining to the development and fundamental understanding of processes and assembly at the nanoscale. Both top-down and bottom-up fabrication approaches may be used to realize a range of well-defined nanostructured materials with desirable physical and chemical attributes. Among these, the bottom-up self-assembly process offers the most realistic solution toward the fabrication of next-generation functional materials and devices. Here, we present a comprehensive review on the physical basis behind self-assembly and the processes reported in recent years to direct the assembly of nanoscale functional blocks into hierarchically ordered structures. This paper emphasizes assembly in the synthetic domain as well in the biological domain, underscoring the importance of biomimetic approaches toward novel materials. In particular, two important classes of directed self-assembly, namely, (i) self-assembly among nanoparticlepolymer systems and (ii) external field-guided assembly are highlighted. The spontaneous self-assembling behavior observed in nature that leads to complex, multifunctional, hierarchical structures within biological systems is also discussed in this review. Recent research undertaken to synthesize hierarchically assembled functional materials have underscored the need as well as the benefits harvested in synergistically combining top-down fabrication methods with bottom-up self-assembly.

Rajagopalan Thiruvengadathan; Venumadhav Korampally; Arkasubhra Ghosh; Nripen Chanda; Keshab Gangopadhyay; Shubhra Gangopadhyay

2013-01-01T23:59:59.000Z

195

The Laconia, New Hampshire bottom ash paving project: Volume 3, Physical Performance Testing Report  

SciTech Connect (OSTI)

Bottom ash is the principal waste stream from the combustion of municipal solid waste (MSW). It is comprised of grate ash (97%), the slag material discharged at the end of the grate system, and grate sifting (3%), the material that melts or falls through the grate structure. This project was conducted to demonstrate the feasibility of using municipal solid waste grate ash as an aggregate substitute in the construction of a pavement binder course for a portion of Rt. 3 in Laconia, New Hampshire. The research was conducted over a two year period during 1993 and 1994. This study is the culmination of an earlier two year characterization study between 1990 and 1992 that documented the physical and environmental characteristics of the bottom ash as it was produced at the Concord, N.H. waste-to-energy (@) facility and used in an asphaltic binder course. Together, these two studies provide a complete evaluation of the potential for using grate ash or bottom ash in asphalt binder course or as recycled asphalt pavement (RAP) in base courses in pavements.

NONE

1996-03-01T23:59:59.000Z

196

Bottom head to shell junction assembly for a boiling water nuclear reactor  

DOE Patents [OSTI]

A bottom head to shell junction assembly which, in one embodiment, includes an annular forging having an integrally formed pump deck and shroud support is described. In the one embodiment, the annular forging also includes a top, cylindrical shaped end configured to be welded to one end of the pressure vessel cylindrical shell and a bottom, conical shaped end configured to be welded to the disk shaped bottom head. Reactor internal pump nozzles also are integrally formed in the annular forging. The nozzles do not include any internal or external projections. Stubs are formed in each nozzle opening to facilitate welding a pump housing to the forging. Also, an upper portion of each nozzle opening is configured to receive a portion of a diffuser coupled to a pump shaft which extends through the nozzle opening. Diffuser openings are formed in the integral pump deck to provide additional support for the pump impellers. The diffuser opening is sized so that a pump impeller can extend at least partially therethrough. The pump impeller is connected to the pump shaft which extends through the nozzle opening. 5 figs.

Fife, A.B.; Ballas, G.J.

1998-02-24T23:59:59.000Z

197

Synthesis of binary images from band-limited functions  

Science Journals Connector (OSTI)

Binary images usually are produced by clipping band-limited images generated through physical systems. We examine the conditions under which a prescribed image can be formed by this...

Nashold, Karen M; Rudin, Walter; Saleh, Bahaa E A; Bucklew, James A

1989-01-01T23:59:59.000Z

198

A Binary Linear Programming Approach for LCA System Boundary Identification  

Science Journals Connector (OSTI)

One of the very first steps in conducting life cycle assessment (LCA) is system boundaries identification. A binary ... boundary between significant and insignificant processes in a LCA study. The proposed model ...

Feri Afrinaldi; Hong-Chao Zhang

2013-01-01T23:59:59.000Z

199

A Molecular-Thermodynamic Lattice Model for Binary Mixtures  

SciTech Connect (OSTI)

Using a method originally proposed for describing a continuum-space polymer fluid, a new expression for the Helmholtz energy of mixing is proposed for a binary lattice mixture. Molecular size asymmetry and nonrandomness due to segment-segment interactions are taken into account. An expression proposed by Yan, Liu and Hu for a binary lattice mixture of monomers, based on the Ising model, is used as a reference system. Calculated critical constants and liquid-liquid coexistence curves are in good agreement with Monte Carlo simulations for lattice mixtures with modest size asymmetry. Because lattice spacing rises with increasing temperature, comparison of calculated binary liquid-liquid equilibria with experiment requires that calculations take into account that the interchange energy falls as temperature rises. While the new expression for the Helmholtz energy of mixing provides much improvement over the Flory-Huggins equation, calculated liquid-liquid equilibria for three binary systems are similar to those from Guggenheim's quasi-chemical theory.

Qin, Yuan; Prausnitz, John M.

2005-04-29T23:59:59.000Z

200

Green's functions and hydrodynamics for isotopic binary diffusion  

E-Print Network [OSTI]

We study classical binary fluid mixtures in which densities vary on very short time (ps) and length (nm) scales, such that hydrodynamics does not apply. In a pure fluid with a localized heat pulse the breakdown of hydrodynamics was overcome using Green's functions which connect the initial densities to those at later times. Numerically it appeared that for long times the results from the Green's functions would approach hydrodynamics. In this paper we extend the Green's functions theory to binary mixtures. For the case of isothermal isobaric mutual diffusion in isotopic binary mixtures and ideal binary mixtures, which is easier to handle than heat conduction yet still non-trivial, we show analytically that in the Green's function approach one recovers hydrodynamic behaviour at long time scales provided the system reaches local equilibrium at long times. This is a first step toward giving the Green's function theory a firmer basis because it can for this case be considered as an extension of hydrodynamics.

R. van Zon; E. G. D. Cohen

2005-08-10T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Topologies and approximation operators induced by binary relations  

E-Print Network [OSTI]

Rough set theory is an important mathematical tool for dealing with uncertain or vague information. This paper studies some new topologies induced by a binary relation on universe with respect to neighborhood opera- tors. Moreover, the relations among them are studied. In additionally, lower and upper approximations of rough sets using the binary relation with respect to neighborhood operators are studied and examples are given.

Nurettin Bagirmaz; A. Fatih Ozcan Hatice Tasbozan; Ilhan Icen

2014-05-09T23:59:59.000Z

202

Crossed diagrams for transport in substitutional binary alloys  

Science Journals Connector (OSTI)

We have adapted the method of summing crossed diagrams to the case of substitutional binary alloys. The summation is done by explicitly uncrossing the diagrams to look like ladders. Details are presented for the case of a single-band model of a simple-cubic lattice with nearest-neighbor hopping. The critical concentration at which the conductivity goes to zero is estimated. Some aspects of the generalization of this method to realistic models of binary alloys are discussed.

S. M. Chitanvis

1985-03-15T23:59:59.000Z

203

Tide-Induced Sediment Resuspension and the Bottom Boundary Layer in an Idealized Estuary with a Muddy Bed  

Science Journals Connector (OSTI)

Sediment transport and bottom boundary layer (BBL) in an idealized estuary with a muddy bed were studied by numerical simulations. The focus was placed on description and prediction of the dynamics of nepheloid layer (a fluidmud layer) developed ...

X. H. Wang

2002-11-01T23:59:59.000Z

204

A Coupled Bottom-Up/Top-Down Model for GHG Abatement Scenarios in the Swiss Housing Sector  

Science Journals Connector (OSTI)

In this paper we report on the coordinated development of a regional module within a world computable general equilibrium model (CGEM) and of a bottom up energy-technology-environment model (ETEM) describing long...

Laurent Drouet; Alain Haurie; Maryse Labriet; Philippe Thalmann

2005-01-01T23:59:59.000Z

205

COMPARATIVE INSTITUTIONAL ADVANTAGES AT THE BOTTOM OF THE PYRAMID: EXPLAINING CROSS-NATIONAL DIFFERENCES IN THE GROWTH  

E-Print Network [OSTI]

ABSTRACT We apply a comparative institutional perspective to extend research into the conditions of successful business innovation in Bottom-of-the-Pyramid (BOP) markets. To test the importance

Edwards, Paul N.

206

Effect of Finite Spatial Resolution on the Turbulent Energy Spectrum Measured in the Coastal Ocean Bottom Boundary Layer  

Science Journals Connector (OSTI)

The effect of finite spatial resolution on the measured energy spectrum is examined via a parametric study using in situ particle image velocimetry (PIV) measurements performed in the bottom boundary layer on the Atlantic continental shelf. Two-...

Erin E. Hackett; Luksa Luznik; Joseph Katz; Thomas R. Osborn

2009-12-01T23:59:59.000Z

207

Effects of thermal pollution on the soft-bottoms surrounding a power station in the Canary Islands (NE Atlantic ocean)  

Science Journals Connector (OSTI)

The spatial and temporal effects of hot seawater (6070C) from a power station on nearby soft-bottom communities were ... coast of Tenerife, Canary Islands, NE Atlantic Ocean). The samples were taken during summ...

Rodrigo Riera; Jorge Nez; Daniel Martn

2011-12-01T23:59:59.000Z

208

Burlington Bottoms Wildlife Mitigation Project. Final Environmental Assessment/Management Plan and Finding of No Significant Impact.  

SciTech Connect (OSTI)

Bonneville Power Administration (BPA) proposes to fund wildlife management and enhancement activities for the Burlington bottoms wetlands mitigation site. Acquired by BPA in 1991, wildlife habitat at Burlington bottoms would contribute toward the goal of mitigation for wildlife losses and inundation of wildlife habitat due to the construction of Federal dams in the lower Columbia and Willamette River Basins. Target wildlife species identified for mitigation purposes are yellow warbler, great blue heron, black-capped chickadee, red-tailed hawk, valley quail, spotted sandpiper, wood duck, and beaver. The Draft Management Plan/Environmental Assessment (EA) describes alternatives for managing the Burlington Bottoms area, and evaluates the potential environmental impacts of the alternatives. Included in the Draft Management Plan/EA is an implementation schedule, and a monitoring and evaluation program, both of which are subject to further review pending determination of final ownership of the Burlington Bottoms property.

Not Available

1994-12-01T23:59:59.000Z

209

Influence of Bottom Friction on Sea Surface Roughness and Its Impact on Shallow Water Wind Wave Modeling  

Science Journals Connector (OSTI)

Using a selected subset of the measured data obtained in shallow waters near Vindeby, Denmark, during RASEX (Ris AirSea Experiment), the role of bottom friction dissipation in predicting wind waves (not swell) is assessed with a third-...

Hakeem K. Johnson; Henrik Kofoed-Hansen

2000-07-01T23:59:59.000Z

210

Phase Transformations in Binary Colloidal Monolayers  

E-Print Network [OSTI]

Phase transformations can be difficult to characterize at the microscopic level due to the inability to directly observe individual atomic motions. Model colloidal systems, by contrast, permit the direct observation of individual particle dynamics and of collective rearrangements, which allows for real-space characterization of phase transitions. Here, we study a quasi-two-dimensional, binary colloidal alloy that exhibits liquid-solid and solid-solid phase transitions, focusing on the kinetics of a diffusionless transformation between two crystal phases. Experiments are conducted on a monolayer of magnetic and nonmagnetic spheres suspended in a thin layer of ferrofluid and exposed to a tunable magnetic field. A theoretical model of hard spheres with point dipoles at their centers is used to guide the choice of experimental parameters and characterize the underlying materials physics. When the applied field is normal to the fluid layer, a checkerboard crystal forms; when the angle between the field and the normal is sufficiently large, a striped crystal assembles. As the field is slowly tilted away from the normal, we find that the transformation pathway between the two phases depends strongly on crystal orientation, field strength, and degree of confinement of the monolayer. In some cases, the pathway occurs by smooth magnetostrictive shear, while in others it involves the sudden formation of martensitic plates.

Ye Yang; Lin Fu; Catherine Marcoux; Joshua E. S. Socolar; Patrick Charbonneau; Benjamin B. Yellen

2015-02-10T23:59:59.000Z

211

Determination of the thermodynamic performance of a bottom outlet cyclone steam-water separator for geothermal use  

E-Print Network [OSTI]

of the requirement for the degree of MASTER OF SCIENCE December 1979 Major Subject: Mechanical Engineering DETERMINATION OF THE THERMODYNAMIC PERFORMANCE OF A BOTTOM OUTLET CYCLONE STEAM-WATER SEPARATOR FOR GEOTHERMAL USE A Thesis by Mark Andrew Chappell... Approved as to style and content by; Chairman o Committee Member e er em er ad epartment December 1979 ABSTRACT Determination of the Thermodynamic Performance of a Bottom Outlet Cyclone Steam-Water Separator for Geothermal Use (December 1979) Mark...

Chappell, Mark Andrew

1979-01-01T23:59:59.000Z

212

Measuring tides and binary parameters from gravitational wave data and eclipsing timings of detached white dwarf binaries  

E-Print Network [OSTI]

The discovery of the most compact detached white dwarf (WD) binary SDSS J065133.33+284423.3 has been discussed in terms of probing the tidal effects in white dwarfs. This system is also a verification source for the space-based gravitational wave (GW) detector, evolved Laser Interferometer Space Antenna (eLISA) which will observe short-period compact Galactic binaries with $P_{orb}\\lesssim 5$ hrs. We address the prospects of doing tidal studies using eLISA binaries by showing the fractional uncertainties in the orbital decay rate and the rate of that decay, $\\dot{f}, \\ddot{f}$ expected from both the GW and EM data for some of the high-$f$ binaries. We find that $\\dot{f}$ and $\\ddot{f}$ can be measured using GW data only for the most massive WD binaries observed at high-frequencies. Form timing the eclipses for $\\sim 10$ years, we find that $\\dot{f}$ can be known to $\\sim 0.1% $ for J0651. We find that from GW data alone, measuring the effects of tides in binaries is (almost) impossible. We also investigate th...

Shah, Sweta

2014-01-01T23:59:59.000Z

213

Arsenic remediation of drinking water using iron-oxide coated coal bottom  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Arsenic remediation of drinking water using iron-oxide coated coal bottom Arsenic remediation of drinking water using iron-oxide coated coal bottom ash Title Arsenic remediation of drinking water using iron-oxide coated coal bottom ash Publication Type Journal Article Year of Publication 2010 Authors Mathieu, Johanna L., Ashok J. Gadgil, Susan E. Addy, and Kristin Kowolik Journal Environmental Science and Health Keywords airflow and pollutant transport group, arsenic, bangladesh, coal bottom ash, drinking water, indoor environment department, water contaminants, water treatment Abstract We describe laboratory and field results of a novel arsenic removal adsorbent called 'Arsenic Removal Using Bottom Ash' (ARUBA). ARUBA is prepared by coating particles of coal bottom ash, a waste material from coal fired power plants, with iron (hydr)oxide. The coating process is simple and conducted at room temperature and atmospheric pressure. Material costs for ARUBA are estimated to be low (~$0.08 per kg) and arsenic remediation with ARUBA has the potential to be affordable to resource-constrained communities. ARUBA is used for removing arsenic via a dispersal-and-removal process, and we envision that ARUBA would be used in community-scale water treatment centers. We show that ARUBA is able to reduce arsenic concentrations in contaminated Bangladesh groundwater to below the Bangladesh standard of 50 ppb. Using the Langmuir isotherm (R2 = 0.77) ARUBA's adsorption capacity in treating real groundwater is 2.6×10-6 mol/g (0.20 mg/g). Time-to-90% (defined as the time interval for ARUBA to remove 90% of the total amount of arsenic that is removed at equilibrium) is less than one hour. Reaction rates (pseudo-second-order kinetic model, R2 ≥ 0.99) increase from 2.4×105 to 7.2×105 g mol-1 min-1 as the groundwater arsenic concentration decreases from 560 to 170 ppb. We show that ARUBA's arsenic adsorption density (AAD), defined as the milligrams of arsenic removed at equilibrium per gram of ARUBA added, is linearly dependent on the initial arsenic concentration of the groundwater sample, for initial arsenic concentrations of up to 1600 ppb and an ARUBA dose of 4.0 g/L. This makes it easy to determine the amount of ARUBA required to treat a groundwater source when its arsenic concentration is known and less than 1600 ppb. Storing contaminated groundwater for two to three days before treatment is seen to significantly increase ARUBA's AAD. ARUBA can be separated from treated water by coagulation and clarification, which is expected to be less expensive than filtration of micron-scale particles, further contributing to the affordability of a community-scale water treatment center

214

Feasible experimental study on the utilization of a 300 MW CFB boiler desulfurizating bottom ash for construction applications  

SciTech Connect (OSTI)

CFB boiler ash cannot be used as a cement replacement in concrete due to its unacceptably high sulfur content. The disposal in landfills has been the most common means of handling ash in circulating fluidized bed boiler power plants. However for a 300 MW CFB boiler power plant, there will be 600,000 tons of ash discharged per year and will result in great volumes and disposal cost of ash byproduct. It was very necessary to solve the utilization of CFB ash and to decrease the disposal cost of CFB ash. The feasible experimental study results on the utilization of the bottom ashes of a 300 MW CFB boiler in Baima power plant in China were reported in this paper. The bottom ashes used for test came from the discharged bottom ashes in a 100 MW CFB boiler in which the anthracite and limestone designed for the 300 MW CFB project was burned. The results of this study showed that the bottom ash could be used for cementitious material, road concrete, and road base material. The masonry cements, road concrete with 30 MPa compressive strength and 4.0 MPa flexural strength, and the road base material used for base courses of the expressway, the main road and the minor lane were all prepared with milled CFB bottom ashes in the lab. The better methods of utilization of the bottom ashes were discussed in this paper.

Lu, X.F.; Amano, R.S. [University of Wisconsin, Milwaukee, WI (United States). Dept. of Mechanical Engineering

2006-12-15T23:59:59.000Z

215

Air bottoming cycle: Use of gas turbine waste heat for power generation  

SciTech Connect (OSTI)

This paper presents a thermodynamic analysis of the Air Bottoming Cycle (ABC) as well as the results of a feasibility study for using the Air Bottoming Cycle for gas turbine waste heat recovery/power generation on oil/gas platforms in the North Sea. The basis for the feasibility study was to utilize the exhaust gas heat from an LM2500PE gas turbine. Installation of the ABC on both a new and an existing platform have been considered. A design reference case is presented, and the recommended ABC is a two-shaft engine with two compressor intercoolers. The compression pressure ratio was found optimal at 8:1. The combined gas turbine and ABC shaft efficiency wa/s calculated to 46.6 percent. The LM2500PE gas turbine contributes with 36.1 percent while the ABC adds 10.5 percent points to the gas turbine efficiency. The ABC shaft power output is 6.6 MW when utilizing the waste heat of an LM2500PE gas turbine. A preliminary thermal and hydraulic design of the ABC main components (compressor, turbine, intercoolers, and recuperator) was carried out. The recuperator is the largest and heaviest component (45 tons). A weight and cost breakdown of the ABC is presented. The total weight of the ABC package was calculated to 154 metric tons, and the ABC package cost to 9.4 million US$. An economical examination for three different cases was carried out. The results show that the ABC alternative (LM2500PE + ABC) is economical, with a rather good margin, compared to the other alternatives. The conclusion is that the Air Bottoming Cycle is an economical alternative for power generation on both new platforms and on existing platforms with demand for more power.

Bolland, O.; Foerde, M. [Norwegian Univ. of Science and Technology, Trondheim (Norway). Div. of Thermal Energy and Hydropower; Haande, B. [Oil Engineering Consultants, Sandvika (Norway)

1996-04-01T23:59:59.000Z

216

Natural Convection Heat Transfer in a Rectangular Liquid Metal Pool With Bottom Heating and Top Cooling  

SciTech Connect (OSTI)

An experimental study is performed to investigate the natural convection heat transfer characteristics with subcooled coolant to create engineering database for basic applications in a lead alloy cooled reactor. Tests are performed in the ALTOS (Applied Liquid-metal Thermal Operation Study) apparatus as part of MITHOS (Metal Integrated Thermo Hydrodynamic Operation System). A relationship is determined between the Nusselt number Nu and the Rayleigh number Ra in the liquid metal rectangular pool. Results are compared with correlations and experimental data in the literature. Given the similar Ra condition, the present test results for Nu of the liquid metal pool with top subcooling are found to be similar to those predicted by the existing correlations or experiments. The current test results are utilized to develop natural convection heat transfer correlations applicable to low Prandtl number Pr fluids that are heated from below and cooled by the external coolant above. Results from this study are slated to be used in designing BORIS (Battery Optimized Reactor Integral System), a small lead cooled modular fast reactor for deployment at remote sites cycled with MOBIS (Modular Optimized Brayton Integral System) for electricity generation, tied with NAVIS (Naval Application Vessel Integral System) for ship propulsion, joined with THAIS (Thermochemical Hydrogen Acquisition Integral System) for hydrogen production, and coupled with DORIS (Desalination Optimized Reactor Integral System) for seawater desalination. Tests are performed with Wood's metal (Pb-Bi-Sn-Cd) filling a rectangular pool whose lower surface is heated and upper surface cooled by forced convection of water. The test section is 20 cm long, 11.3 cm high and 15 cm wide. The simulant has a melting temperature of 78 deg. C. The constant temperature and heat flux condition was realized for the bottom heating once the steady state had been met. The test parameters include the heated bottom surface temperature of the liquid metal pool, the input power to the bottom surface of the section, and the coolant temperature. (authors)

Lee, Il S.; Yu, Yong H.; Son, Hyoung M.; Hwang, Jin S.; Suh, Kune Y. [Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul, 151-742 (Korea, Republic of)

2006-07-01T23:59:59.000Z

217

Solution of 2D Boussinesq systems with FreeFem++: The flat bottom case  

E-Print Network [OSTI]

FreeFem++ is an open source platform to solve partial differential equations numerically, based on finite element methods. The FreeFem++ platform has been developed to facilitate teaching and basic research through prototyping. For the moment this platform is restricted to the numerical simulations of problems which admit a variational formulation. We will use FreeFem++ in this work to solve a three-parameter family of Boussinesq type systems in two space dimensions which approximate the three-dimensional Euler equations over an horizontal bottom.

Sadaka, Georges

2012-01-01T23:59:59.000Z

218

Simultaneous wave and current forces on a cylinder near the bottom boundary  

E-Print Network [OSTI]

) December 1979 1Z43363 ABSTRACT Simultaneous Wave and Current Forces on a Cylinder Near the Bottom Boundary. (December 1979) David Alex Knoll, B. S. , University of Missouri at Rolls Chai. rman of Advisory Committee: Dr. J. B. Herbich This paper is a.... ACKNOWLEDGEMENT S The author wishes to extend his appreciation to Dr. John B. Herbich of the Ocean Engineering Program for assistance and guidance in the work and preparation of this thesis. The author is also grateful to Dr. T. C. Su of the Ocean Engineer...

Knoll, David Alex

2012-06-07T23:59:59.000Z

219

A multi-dimensional criticism of the Triple Bottom Line reporting approach  

Science Journals Connector (OSTI)

While the Triple Bottom Line (TBL) approach has triggered a sense of shift in ways companies think about sustainable reporting, there are still many limitations within TBL. The fundamental roots of TBL are ingrained in a quantitative framework and have no sense of integration or a systemic approach to viewing problems. The main purpose of this paper is to provide a critical review of the TBL approach and its weaknesses. The paper provides a detailed literature review of the evolution of TBL, and then shifts towards the limitations of TBL especially in terms of measurement and the lack of systemic thinking.

Kaushik Sridhar

2011-01-01T23:59:59.000Z

220

Construction of an ultra low temperature STM with a bottom loading mechanism  

Science Journals Connector (OSTI)

We have constructed and tested an ultra-low temperature scanning tunneling microscope that works with an atomic resolution at ultra low temperatures (T?126mK) in magnetic fields (B?6T) in ultra high vacuum (UHV). Clean sample surfaces can be prepared by several different methods and characterized by low energy electron diffraction in situ of UHV. A unique bottom loading mechanism enables us to cool back to the base temperature within 3h after changing the sample and scanning tunneling microscopy tips.

T. Matsui; H. Kambara; I. Ueda; T. Shishido; Y. Miyatake; Hiroshi Fukuyama

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


221

Durability and microstructure characteristics of alkali activated coal bottom ash geopolymer cement  

Science Journals Connector (OSTI)

Abstract Many studies have focused on the production of mortar and concrete without cement. This is referred to as geopolymer mortar or concrete. This paper discusses the effect of alkali oxides (Na2O=8, 12, 16wt.% and SiO2=0, 4, 8, 12wt.%) on compressive strength, microstructure and durability of circulating fluidized bed combustion coal bottom ash (CBA) geopolymer cements (GC). Durability and morphology tests were carried out through heating and freezing tests. The highest compressive strength (25.83MPa) was achieved at Na2O wt.%=12, SiO2 wt.%=8. The optimum atomic ratios for a compact microstructure were obtained for Si/Al between 3.5 and 4 and Si/Na close to 0.5. Following the sintering, the main reaction products (N-A-S-H gel) became more amorphous at 800C, attaining Si/Al and Si/Na atomic ratios of 4.54 and 0.98. Sodium carbonate formation was observed at 800C. Also, the strength loss of GC was only 6.77% after 30 freeze-thaw cycles. The results show that durable geopolymer concrete without cement can be produced by using waste bottom coal ash. Therefore, the production of geopolymer concrete has a high environmental impact, decreasing waste material in addition to global warming.

?lker Bekir Topu; Mehmet U?ur Toprak; Tayfun Uyguno?lu

2014-01-01T23:59:59.000Z

222

Habitat Evaluation Procedures (HEP) Report; Burlington Bottoms, Technical Report 1993-2003.  

SciTech Connect (OSTI)

Burlington Bottoms, consisting of approximately 417 acres of riparian and wetland habitat, was purchased by the Bonneville Power Administration in November 1991. The site is located approximately 1/2 mile north of the Sauvie Island Bridge (T2N R1W Sections 20, 21), and is bound on the east side by Multnomah Channel and on the west side by the Burlington Northern Railroad right-of-way and U.S. Highway 30 (Figures 1 and 2). Wildlife habitat values resulting from the purchase of this site will contribute toward the goal of mitigating for habitat lost as outlined in the Columbia and Willamette River Basin's Fish and Wildlife Program and Amendments. Under this Program, mitigation goals were developed as a result of the loss of wildlife habitat due to the development and operation of Federal hydro-electric facilities in the Columbia and Willamette River Basins. In 1993, an interdisciplinary team was formed to develop and implement quantitative Habitat Evaluation Procedures (HEP) to document the value of various habitats at Burlington Bottoms. Results of the HEP will be used to: (1) determine the current status and habitat enhancement potential of the site consistent with wildlife mitigation goals and objectives; and (2) develop a management plan for the area. HEP participants included; Charlie Craig, BPA; Pat Wright, Larry Rasmussen, and Ron Garst, U. S. Fish and Wildlife Service; John Christy, The Nature Conservancy; and Doug Cottam, Sue Beilke, and Brad Rawls, Oregon Department of Fish and Wildlife.

Beilke, Susan

1993-08-01T23:59:59.000Z

223

Diverter/bop system and method for a bottom supported offshore drilling rig  

SciTech Connect (OSTI)

This patent describes a system adapted for alternative use as a diverter or a blowout preventer for a bottom supported drilling rig and adapted for positioning beneath a rotary table of the drilling rig, the system comprising: a fluid flow controller having a controller housing with a lower opening and an upper opening and a vertical flow path therebetween and an outlet passage provided in its housing wall, and at least two bases. A method is described for installing a system adapted for alternative connection as a diverter or a blowout preventer for a bottom supported drilling rig positioned beneath a rotary table of the drilling rig after structural casing has been set in a borehole. The method comprises: positioning a first telescoping spool having a lower end and an upper end below the rotary table, the first spool having a first base disposed at its upper end, the first base having a port disposed in its wall; aligning a fluid flow controller having a controller housing wall outlet passage and adapted for alternative use as a diverter or a blowout preventer so that the controller is substantially vertically aligned between a bore of the rotary table above and the structural casing below; and securing the fluid flow controller beneath the drilling rig rotary table.

Roche, J.R.; Alexander, G.G.

1987-03-03T23:59:59.000Z

224

Fostering interconnectivity dimension of low-carbon cities: The triple bottom line re-interpretation  

Science Journals Connector (OSTI)

In facilitating the progress towards low-carbon cities, there is no lack of available green technologies, planning techniques, economic tools, social development strategies, etc. These technologies, strategies and techniques have, in fact, long been deployed in many cities and communities around the world. However, the outcomes have been somewhat slow and less than expected. This is also manifested in the lower-than-expectation outcomes of the formation of a meaningful global climate change treaty so far. The barriers have clearly been unveiled as disconnection among the triple bottom lines (TBL) in the approach. By linking the concept of low-carbon cities to sustainable development (informed by the TBL), the paper highlights the implication of misinterpretation of a popular TBL diagram, leading to fragmented, compromised approach to LCC. Cases in point are isolating and excluding social and economic activities that are not environmental friendly, and trading-off environmentally-friendly activities that are notprofitable in economic sense. Re-interpretation the popular TBL diagram literally from a three-dimensional lens offers an alternative approach, presented in an integrated framework towards low-carbon cities. The vital factors in the framework are safeguarding the positive dynamic interconnectivities of the three bottom lines, aligning their core values (in contrast to the isolating and excluding exercise), amplifying their common interest (instead of trading-off activities), and deploying strategies from planning, renewable technologies, education and policy making to address multiple and interconnected issues reciprocally.

Wynn Chi Nguyen Cam

2013-01-01T23:59:59.000Z

225

A DEEPLY ECLIPSING DETACHED DOUBLE HELIUM WHITE DWARF BINARY  

SciTech Connect (OSTI)

Using Liverpool Telescope+RISE photometry we identify the 2.78 hr period binary star CSS 41177 as a detached eclipsing double white dwarf binary with a 21,100 K primary star and a 10,500 K secondary star. This makes CSS 41177 only the second known eclipsing double white dwarf binary after NLTT 11748. The 2 minute long primary eclipse is 40% deep and the secondary eclipse 10% deep. From Gemini+GMOS spectroscopy, we measure the radial velocities of both components of the binary from the H{alpha} absorption line cores. These measurements, combined with the light curve information, yield white dwarf masses of M{sub 1} = 0.283 {+-} 0.064 M{sub sun} and M{sub 2} = 0.274 {+-} 0.034 M{sub sun}, making them both helium core white dwarfs. As an eclipsing, double-lined spectroscopic binary, CSS 41177 is ideally suited to measuring precise, model-independent masses and radii. The two white dwarfs will merge in roughly 1.1 Gyr to form a single sdB star.

Parsons, S. G.; Marsh, T. R.; Gaensicke, B. T. [Department of Physics, University of Warwick, Coventry, CV4 7AL (United Kingdom); Drake, A. J. [California Institute of Technology, 1200 E. California Blvd, CA 91225 (United States); Koester, D. [Institut fuer Theoretische Physik und Astrophysik, Universitaet Kiel (Germany)

2011-07-10T23:59:59.000Z

226

DOUBLE-LINED SPECTROSCOPIC BINARY STARS IN THE RAVE SURVEY  

SciTech Connect (OSTI)

We devise a new method for the detection of double-lined binary stars in a sample of the Radial Velocity Experiment (RAVE) survey spectra. The method is both tested against extensive simulations based on synthetic spectra and compared to direct visual inspection of all RAVE spectra. It is based on the properties and shape of the cross-correlation function, and is able to recover {approx}80% of all binaries with an orbital period of order 1 day. Systems with periods up to 1 yr are still within the detection reach. We have applied the method to 25,850 spectra of the RAVE second data release and found 123 double-lined binary candidates, only eight of which are already marked as binaries in the SIMBAD database. Among the candidates, there are seven that show spectral features consistent with the RS CVn type (solar type with active chromosphere) and seven that might be of W UMa type (over-contact binaries). One star, HD 101167, seems to be a triple system composed of three nearly identical G-type dwarfs. The tested classification method could also be applicable to the data of the upcoming Gaia mission.

Matijevic, G.; Zwitter, T. [Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana (Slovenia); Munari, U.; Siviero, A. [INAF Osservatorio Astronomico di Padova, Asiago (Italy); Bienayme, O.; Siebert, A. [Observatorie de Strasbourg, Strasbourg (France); Binney, J. [Rudolf Pierls Center for Theoretical Physics, University of Oxford, Oxford (United Kingdom); Bland-Hawthorn, J. [Sydney Institute for Astronomy, School of Physics, University of Sydney, Sydney (Australia); Boeche, C.; Steinmetz, M. [Astrophysikalisches Institut Potsdam, Potsdam (Germany); Campbell, R. [Western Kentucky University, Bowling Green, KY (United States); Freeman, K. C. [RSAA, Australian National University, Camberra (Australia); Gibson, B. [University of Central Lancashire, Preston (United Kingdom); Gilmore, G. [Institute of Astronomy, Cambridge (United Kingdom); Grebel, E. K. [Astronomisches Rechen-Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Heidelberg (Germany); Helmi, A. [Kapteyn Astronomical Institute, University of Groningen, Groningen (Netherlands); Navarro, J. F. [University of Victoria, Victoria (Canada); Parker, Q. A. [Macquarie University, Sydney (Australia); Seabroke, G. M. [e2v Centre for Electronic Imaging, Planetary and Space Sciences Research Institute, Open University, Walton Hall, Milton Keynes (United Kingdom); Watson, F. G., E-mail: gal.matijevic@fmf.uni-lj.s [Anglo-Australian Observatory, Sydney (Australia)

2010-07-15T23:59:59.000Z

227

PERIOD ERROR ESTIMATION FOR THE KEPLER ECLIPSING BINARY CATALOG  

SciTech Connect (OSTI)

The Kepler Eclipsing Binary Catalog (KEBC) describes 2165 eclipsing binaries identified in the 115 deg{sup 2} Kepler Field based on observations from Kepler quarters Q0, Q1, and Q2. The periods in the KEBC are given in units of days out to six decimal places but no period errors are provided. We present the PEC (Period Error Calculator) algorithm, which can be used to estimate the period errors of strictly periodic variables observed by the Kepler Mission. The PEC algorithm is based on propagation of error theory and assumes that observation of every light curve peak/minimum in a long time-series observation can be unambiguously identified. The PEC algorithm can be efficiently programmed using just a few lines of C computer language code. The PEC algorithm was used to develop a simple model that provides period error estimates for eclipsing binaries in the KEBC with periods less than 62.5 days: log {sigma}{sub P} Almost-Equal-To - 5.8908 + 1.4425(1 + log P), where P is the period of an eclipsing binary in the KEBC in units of days. KEBC systems with periods {>=}62.5 days have KEBC period errors of {approx}0.0144 days. Periods and period errors of seven eclipsing binary systems in the KEBC were measured using the NASA Exoplanet Archive Periodogram Service and compared to period errors estimated using the PEC algorithm.

Mighell, Kenneth J. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Plavchan, Peter [NASA Exoplanet Science Institute, California Institute of Technology, Pasadena, CA 91125 (United States)

2013-06-15T23:59:59.000Z

228

Planetary Microlensing Perturbations: True Planets or Binary Sources?  

E-Print Network [OSTI]

A planetary microlensing event is characterized by a short-lived perturbation to the standard Paczy\\'nski curve. Planetary perturbations typically last from a few hours to a day, and have maximum amplitudes, $\\dmax$, of $5-20%$ of the standard curve. There exist a subset of binary-source events that can reproduce these main features, and thus masquerade as planetary events. These events require a binary source with a small flux ratio, $\\epsil \\sim 10^{-2}-10^{-4}$, and a small impact parameter for the fainter source, $\\beta_2 \\lsim \\epsil / \\dmax$. The detection probability of events of this type is $\\sim \\beta_2$, and can be as high as $\\sim 30%$; this is comparable to planetary detection rates. Thus a sample of planetary-like perturbations could be seriously contaminated by binary-source events, and there exists the possibility that completely meaningless physical parameters would be derived for any given perturbation. Here I derive analytic expressions for a binary-source event in the extreme flux ratio limit, and use these to demonstrate the basic degeneracy between binary source and planet perturbations. I describe how the degeneracy can be broken by dense and accurate sampling of the perturbation, optical/infrared photometry, or spectroscopic measurements.

B. Scott Gaudi

1997-06-26T23:59:59.000Z

229

The Disruption of Vessel-Spanning Bubbles with Sloped Fins in Flat-Bottom and 2:1 Elliptical-Bottom Vessels  

SciTech Connect (OSTI)

Radioactive sludge was generated in the K-East Basin and K-West Basin fuel storage pools at the Hanford Site while irradiated uranium metal fuel elements from the N Reactor were being stored and packaged. The fuel has been removed from the K Basins, and currently, the sludge resides in the KW Basin in large underwater Engineered Containers. The first phase to the Sludge Treatment Project being led by CH2MHILL Plateau Remediation Company (CHPRC) is to retrieve and load the sludge into sludge transport and storage containers (STSCs) and transport the sludge to T Plant for interim storage. The STSCs will be stored inside T Plant cells that are equipped with secondary containment and leak-detection systems. The sludge is composed of a variety of particulate materials and water, including a fraction of reactive uranium metal particles that are a source of hydrogen gas. If a situation occurs where the reactive uranium metal particles settle out at the bottom of a container, previous studies have shown that a vessel-spanning gas layer above the uranium metal particles can develop and can push the overlying layer of sludge upward. The major concern, in addition to the general concern associated with the retention and release of a flammable gas such as hydrogen, is that if a vessel-spanning bubble (VSB) forms in an STSC, it may drive the overlying sludge material to the vents at the top of the container. Then it may be released from the container into the cells secondary containment system at T Plant. A previous study demonstrated that sloped walls on vessels, both cylindrical coned-shaped vessels and rectangular vessels with rounded ends, provided an effective approach for disrupting a VSB by creating a release path for gas as a VSB began to rise. Based on the success of sloped-wall vessels, a similar concept is investigated here where a sloped fin is placed inside the vessel to create a release path for gas. A key potential advantage of using a sloped fin compared to a vessel with a sloped wall is that a small fin decreases the volume of a vessel available for sludge storage by a very small fraction compared to a cone-shaped vessel. The purpose of this study is to quantify the capability of sloped fins to disrupt VSBs and to conduct sufficient tests to estimate the performance of fins in full-scale STSCs. Experiments were conducted with a range of fin shapes to determine what slope and width were sufficient to disrupt VSBs. Additional tests were conducted to demonstrate how the fin performance scales with the sludge layer thickness and the sludge strength, density, and vessel diameter based on the gravity yield parameter, which is a dimensionless ratio of the force necessary to yield the sludge to its weight.( ) Further experiments evaluated the difference between vessels with flat and 2:1 elliptical bottoms and a number of different simulants, including the KW container sludge simulant (complete), which was developed to match actual K-Basin sludge. Testing was conducted in 5-in., 10-in., and 23-in.-diameter vessels to quantify how fin performance is impacted by the size of the test vessel. The most significant results for these scale-up tests are the trend in how behavior changes with vessel size and the results from the 23-in. vessel. The key objective in evaluating fin performance is to determine the conditions that minimize the volume of a VSB when disruption occurs because this reduces the potential for material inside the STSC from being released through vents.

Gauglitz, Phillip A.; Buchmiller, William C.; Jenks, Jeromy WJ; Chun, Jaehun; Russell, Renee L.; Schmidt, Andrew J.; Mastor, Michael M.

2010-09-22T23:59:59.000Z

230

Russell Hulse, the First Binary Pulsar, and Science Education  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Russell Hulse, the First Binary Pulsar, and Science Education Russell Hulse, the First Binary Pulsar, and Science Education Resources with Additional Information 'Dr. Russell A. Hulse of Princeton University, the discoverer of the first binary pulsar and co-recipient of the 1993 Nobel Prize in physics, will affiliate with The University of Texas at Dallas (UTD) as a visiting professor of physics and of science and math education, beginning in January 2004. Russell Hulse Courtesy Princeton Plasma Physics Laboratory Hulse will be involved with developing innovative science and mathematics education programs for primary and secondary schools, including those in several Texas school districts, as well as with developing activities in more informal settings, such as libraries. During his appointment at UTD, Hulse will retain his affiliation with Princeton University, where he is a principal research physicist at the U.S. Department of Energy's Princeton Plasma Physics Laboratory.

231

Subdwarf B binaries in the Edinburgh-Cape Survey  

E-Print Network [OSTI]

We give an update of the results of a campaign to obtain orbital solutions of subdwarf B stars from the Edinburgh-Cape survey (Stobie et al. 1997). To date we have obtained blue spectra of 40 subdwarf B stars from the Edinburgh-Cape catalogue using the grating spectrograph at the 1.9m Radcliffe telescope at the South African Astronomical Observatory. We find that 17 out of these 40 are certain binaries with a few other objects showing radial velocity variations of small amplitude. The binary fraction found in our sample, after correcting for our binary detection efficiency, is 48%. We have secured the orbital parameters for 4 of the 17 systems and narrowed down the orbits of another 7 to a small range of periods.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh; D. Kilkenny; D. O'Donoghue

2005-09-12T23:59:59.000Z

232

The orbital period distribution of subdwarf B binaries  

E-Print Network [OSTI]

We present the results of a 3.5 year long campaign to measure orbital periods of subdwarf B (sdB) star binaries. We directly compare our observed orbital period distribution with that predicted by using binary population synthesis. Up to now, most of our systems seem to have been formed through two of the formation channels discussed by Han et al.(2003), i.e. the first and the second common envelope ejection (CE) channels. At this point, thanks to the long baseline of our observations, we are starting to detect also very long orbital period systems. These have probably come from a complete different formation path, the first stable Roche Lobe overflow (RLOF) channel in which the first mass transfer phase is stable. This channel is expected to lead to the formation of very wide binaries with orbital periods ranging between 0.5 to 2000 days.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh

2003-09-03T23:59:59.000Z

233

Magnetic fields of neutron stars in X-ray binaries  

E-Print Network [OSTI]

A substantial fraction of the known neutron stars resides in X-ray binaries -- systems in which one compact object accretes matter from a companion star. Neutron stars in X-ray binaries have magnetic fields among the highest found in the Universe, spanning at least the range from $\\sim10^8$ to several 10$^{13}$ G. The magnetospheres around these neutron stars have a strong influence on the accretion process, which powers most of their emission. The magnetic field intensity and geometry, are among the main factors responsible for the large variety of spectral and timing properties observed in the X-ray energy range, making these objects unique laboratories to study the matter behavior and the radiation processes in magnetic fields unaccessible on Earth. In this paper we review the main observational aspects related to the presence of magnetic fields in neutron star X-ray binaries and some methods that are used to estimate their strength.

Revnivtsev, Mikhail

2014-01-01T23:59:59.000Z

234

Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures  

SciTech Connect (OSTI)

Gravels and coarse sands make up significant portions of some environmentally important sediments, while the hydraulic properties of the sediments are typically obtained in the laboratory using only the fine fraction (e.g., <2 mm or 4.75 mm). Researchers have found that the content of gravel has significant impacts on the hydraulic properties of the bulk soils. Laboratory experiments were conducted to measure the porosity and the saturated hydraulic conductivity of binary mixtures with different fractions of coarse and fine components. We proposed a mixing-coefficient model to estimate the porosity and a power-averaging method to determine the effective particle diameter and further to predict the saturated hydraulic conductivity of binary mixtures. The proposed methods could well estimate the porosity and saturated hydraulic conductivity of the binary mixtures for the full range of gravel contents and was successfully applied to two data sets in the literature.

Zhang, Z. F.; Ward, Anderson L.; Keller, Jason M.

2009-09-27T23:59:59.000Z

235

COMPACT BINARY PROGENITORS OF SHORT GAMMA-RAY BURSTS  

SciTech Connect (OSTI)

In recent years, detailed observations and accurate numerical simulations have provided support to the idea that mergers of compact binaries containing either two neutron stars (NSs) or an NS and a black hole (BH) may constitute the central engine of short gamma-ray bursts (SGRBs). The merger of such compact binaries is expected to lead to the production of a spinning BH surrounded by an accreting torus. Several mechanisms can extract energy from this system and power the SGRBs. Here we connect observations and numerical simulations of compact binary mergers, and use the current sample of SGRBs with measured energies to constrain the mass of their powering tori. By comparing the masses of the tori with the results of fully general-relativistic simulations, we are able to infer the properties of the binary progenitors that yield SGRBs. By assuming a constant efficiency in converting torus mass into jet energy, {epsilon}{sub jet} = 10%, we find that most of the tori have masses smaller than 0.01 M{sub Sun }, favoring 'high-mass' binary NSs mergers, i.e., binaries with total masses {approx}> 1.5 the maximum mass of an isolated NS. This has important consequences for the gravitational wave signals that may be detected in association with SGRBs, since 'high-mass' systems do not form a long-lived hypermassive NS after the merger. While NS-BH systems cannot be excluded to be the engine of at least some of the SGRBs, the BH would need to have an initial spin of {approx}0.9 or higher.

Giacomazzo, Bruno [JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309 (United States); Perna, Rosalba [JILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309 (United States); Rezzolla, Luciano [Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Potsdam D-14476 (Germany); Troja, Eleonora [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Lazzati, Davide [Department of Physics, NC State University, 2401 Stinson Drive, Raleigh, NC 27695-8202 (United States)

2013-01-10T23:59:59.000Z

236

Binary fish passage models for uniform and nonuniform flows  

SciTech Connect (OSTI)

Binary fish passage models are considered by many fisheries managers to be the best 21 available practice for culvert inventory assessments and for fishway and barrier design. 22 Misunderstandings between different binary passage modeling approaches often arise, 23 however, due to differences in terminology, application and presentation. In this paper 24 one-dimensional binary fish passage models are reviewed and refined to clarify their 25 origins and applications. For uniform flow, a simple exhaustion-threshold (ET) model 26 equation is derived that predicts the flow speed threshold in a fishway or velocity barrier 27 that causes exhaustion at a given maximum distance of ascent. Flow speeds at or above 28 the threshold predict failure to pass (exclusion). Flow speeds below the threshold predict 29 passage. The binary ET model is therefore intuitive and easily applied to predict passage 30 or exclusion. It is also shown to be consistent with the distance-maximizing model. The 31 ET model s limitation to uniform flow is addressed by deriving a passage model that 32 accounts for nonuniform flow conditions more commonly found in the field, including 33 backwater profiles and drawdown curves. Comparison of these models with 34 experimental observations of volitional passage for Gambusia affinis in uniform and 35 nonuniform flows indicates reasonable prediction of binary outcomes (passage or 36 exclusion) if the flow speed is not near the threshold flow velocity. More research is 37 needed on fish behavior, passage strategies under nonuniform flow regimes and 38 stochastic methods that account for individual differences in swimming performance at or 39 near the threshold flow speed. Future experiments should track and measure ground 40 speeds of ascending fish to test nonuniform flow passage strategies and to improve model 41 predictions. Stochastic models, such as Monte-Carlo techniques, that account for 42 different passage performance among individuals and allow prediction of the percentage 43 of fish passing would be particularly useful near flow speed thresholds where binary 44 passage models are clearly limited.

Neary, Vincent S [ORNL

2011-01-01T23:59:59.000Z

237

Search for gravitational waves from binary black hole inspiral, merger, and ringdown  

E-Print Network [OSTI]

We present the first modeled search for gravitational waves using the complete binary black-hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched ...

Barnum, Sam

238

E-Print Network 3.0 - accreting x-ray binaries Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Physics 27 Broad-band spectral properties of accreting X-ray binary pulsars Mauro Orlandini * Summary: Broad-band spectral properties of accreting X-ray binary pulsars...

239

E-Print Network 3.0 - accreting low-mass binary Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

C channel to form the Galactic low mass BH binaries... , and for the occurrence of gamma-ray bursts from collapsars in binaries. Rotational eects in accreting white dwarfs......

240

Estimation of the error for small-sample optimal binary filter design using prior knowledge  

E-Print Network [OSTI]

Optimal binary filters estimate an unobserved ideal quantity from observed quantities. Optimality is with respect to some error criterion, which is usually mean absolute error MAE (or equivalently mean square error) for the binary values. Both...

Sabbagh, David L

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Numerical studies of hypersonic binary gas-mixture flows near a sphere  

E-Print Network [OSTI]

Numerical studies of hypersonic binary gas-mixture flows near a sphere V.V. Riabov 1 Diffusive] to study the flow. In the present study, diffusive effects in hypersonic flows of binary gas-mixtures near

Riabov, Vladimir V.

242

Subdwarf B Binaries from the Edinburgh--Cape Survey  

E-Print Network [OSTI]

We present the first results of a campaign to obtain orbital solutions of subdwarf B (sdB) stars from the Edinburgh-Cape survey. We have obtained blue spectra of 35 sdBs, 20 of which have been observed in more than two epochs. 15 out of the 35 are certain binaries with a few other objects showing radial velocity variations with small amplitude, possibly long period sdB binaries. We have secured the orbital parameters for 2 of the 15 systems and narrowed down the orbits of another one to a small range of periods. These preliminary results only use data taken up to December 2003.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh; D. Kilkenny; D. O'Donoghue

2004-10-11T23:59:59.000Z

243

Implementation of a low power adaptive binary encoder  

E-Print Network [OSTI]

encoder is the BinaryEncoder block. This is the block which contains the most original design and the key to the adaptive portion for 30 P robability aout[5:0] bout[5:0] cout[5:0] dout[5:0] eout[5:0] fout[5:0] gout[5:0] newprob ttl& O'U 8 u- 0) I C... FIGURE 19 Probability symbol next countertotal d D countera counterb counterc counterd aout bout cout dout countere counterl counter tout gout FIGURE 20 Probability schematic 31 this adaptive binary encoder. Figure 21 shows the input...

Herrin, Scott W

2012-06-07T23:59:59.000Z

244

Particle acceleration in the colliding winds binary WR140  

E-Print Network [OSTI]

Massive WR+O star systems produce high-temperature, shock-heated plasma where the wind of the WR star and that of its binary companion collide - the wind-collision region (WCR). The WCR is a source of thermal (e.g. hard X-rays) and non-thermal (e.g. synchrotron) emission, the latter arising from electrons and ions accelerated to relativistic energies. These colliding wind binaries provide an excellent laboratory for the study of particle acceleration at higher mass, photon and magnetic energy densities than exist in SNRs. Recent models of the non-thermal emission from WR 140 have provided insight into this process.

J. M. Pittard; S. M. Dougherty

2007-03-23T23:59:59.000Z

245

Radio emission from Colliding-Wind Binaries: Observations and Models  

E-Print Network [OSTI]

We have developed radiative transfer models of the radio emission from colliding-wind binaries (CWB) based on a hydrodynamical treatment of the wind-collision region (WCR). The archetype of CWB systems is the 7.9-yr period binary WR140, which exhibits dramatic variations at radio wavelengths. High-resolution radio observations of WR140 permit a determination of several system parameters, particularly orbit inclination and distance, that are essential for any models of this system. A model fit to data at orbital phase 0.9 is shown, and some short comings of our model described.

S. M. Dougherty; J. M. Pittard; E. P. O'Connor

2005-10-18T23:59:59.000Z

246

Leon Lederman, the K-meson, the Muon Neutrino, and the Bottom Quark  

Office of Scientific and Technical Information (OSTI)

Leon Lederman, the K-meson, the Muon Leon Lederman, the K-meson, the Muon Neutrino, and the Bottom Quark His Honors · His Involvement in Science Education His Wisdom and Humor · Resources with Additional Information Leon Lederman started his career in Physics at Columbia University, where he earned his Ph.D. in 1952. He 'stayed on at Columbia following his studies, remaining for nearly 30 years, as the Eugene Higgins Professor and, from 1961 until 1979, as director of Nevis Laboratories in Irvington, the Columbia physics department center for experimental research in high-energy physics. ... Leon Lederman Courtesy of Fermilab In 1956, working with a Columbia team at the Brookhaven National Laboratory on Long Island, Lederman discovered a new particle, the long-lived neutral K-meson, which had been predicted from theory. Further research at Columbia demonstrated the non-conservation of parity during muon decay. ...

247

Analysis of core damage frequency: Peach Bottom, Unit 2 internal events  

SciTech Connect (OSTI)

This document contains the appendices for the accident sequence analysis of internally initiated events for the Peach Bottom, Unit 2 Nuclear Power Plant. This is one of the five plant analyses conducted as part of the NUREG-1150 effort for the Nuclear Regulatory Commission. The work performed and described here is an extensive reanalysis of that published in October 1986 as NUREG/CR-4550, Volume 4. It addresses comments from numerous reviewers and significant changes to the plant systems and procedures made since the first report. The uncertainty analysis and presentation of results are also much improved, and considerable effort was expended on an improved analysis of loss of offsite power. The content and detail of this report is directed toward PRA practitioners who need to know how the work was done and the details for use in further studies. 58 refs., 58 figs., 52 tabs.

Kolaczkowski, A.M.; Cramond, W.R.; Sype, T.T.; Maloney, K.J.; Wheeler, T.A.; Daniel, S.L. (Science Applications International Corp., Albuquerque, NM (USA); Sandia National Labs., Albuquerque, NM (USA))

1989-08-01T23:59:59.000Z

248

New results on CLEO`s heavy quarks - bottom and charm  

SciTech Connect (OSTI)

While the top quark is confined to virtual reality for CLEO, the increased luminosity of the Cornell Electron Storage Ring (CESR) and the improved photon detection capabilities of the CLEO`s {open_quotes}heavy{close_quotes} quarks - bottom and charm. I will describe new results in the B meson sector including the first observation of exclusive b {yields} ulv decays, upper limits on gluonic penguin decay rates, and precise measurements of semileptonic and hadronic b {yields} c branching fractions. The charmed hadron results that are discussed include the observation of isospin violation in D{sub s}*{sup +} decays, an update on measurements of the D{sub s}{sup +} decay constant, and the observation of a new excited {Xi}{sub c} charmed baryon. These measurements have had a large impact on our understanding of heavy quark physics.

Menary, S. [Univ. of California, Santa Barbara, CA (United States)

1997-01-01T23:59:59.000Z

249

Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations  

E-Print Network [OSTI]

We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.

Gennaro Corcella; Volker Drollinger

2005-11-23T23:59:59.000Z

250

Modeling Energy Recovery Using Thermoelectric Conversion Integrated with an Organic Rankine Bottoming Cycle  

SciTech Connect (OSTI)

Hot engine exhaust represents a resource that is often rejected to the environment without further utilization. This resource is most prevalent in the transportation sector, but stationary engine-generator systems also typically do not utilize this resource. Engine exhaust is a source of high grade thermal energy that can potentially be utilized by various approaches to produce electricity or to drive heating and cooling systems. This paper describes a model system that employs thermoelectric conversion as a topping cycle integrated with an organic Rankine bottoming cycle for waste heat utilization. This approach is being developed to fully utilize the thermal energy contained in hot exhaust streams. The model is composed of a high temperature heat exchanger which extracts thermal energy for driving the thermoelectric conversion elements. However, substantial sensible heat remains in the exhaust stream after emerging from the heat exchanger. The model incorporates a closely integrated bottoming cycle to utilize this remaining thermal energy in the exhaust stream. The model has many interacting parameters that define combined system quantities such as overall output power, efficiency, and total energy utilization factors. In addition, the model identifies a maximum power operating point for the system. That is, the model can identify the optimal amount of heat to remove from the exhaust flow to run through the thermoelectric elements. Removing too much or too little heat from the exhaust stream in this stage will reduce overall cycle performance. The model has been developed such that heat exchanger UAh values, thermal resistances, ZT values, and multiple thermoelectric elements can be investigated in the context of system operation. The model also has the ability to simultaneously determine the effect of each cycle design parameter on the performance of the overall system, thus giving the ability to utilize as much waste heat as possible. Key analysis results are presented showing the impact of critical design parameters on power output, system performance and inter-relationships between design parameters in governing performance.

Miller, Erik W.; Hendricks, Terry J.; Peterson, Richard B.

2009-07-01T23:59:59.000Z

251

Pilot scale evaluation of the BABIU process Upgrading of landfill gas or biogas with the use of MSWI bottom ash  

Science Journals Connector (OSTI)

Abstract Biogas or landfill gas can be converted to a high-grade gas rich in methane with the use of municipal solid waste incineration bottom ash as a reactant for fixation of CO2 and H2S. In order to verify results previously obtained at a laboratory scale with 6590kg of bottom ash (BA), several test runs were performed at a pilot scale, using 5001000kg of bottom ash and up to 9.2Nm3/h real landfill gas from a landfill in the Tuscany region (Italy). The input flow rate was altered. The best process performance was observed at a input flow rate of 3.7Nm3/(htBA). At this flow rate, the removal efficiencies for H2S were approximately 99.599%.

P. Mostbauer; L. Lombardi; T. Olivieri; S. Lenz

2014-01-01T23:59:59.000Z

252

A characterisation of the complexity of forbidding subproblems in binary Max-CSP  

Science Journals Connector (OSTI)

Tractable classes of binary CSP and binary Max-CSP have recently been discovered by studying classes of instances defined by excluding subproblems. In this paper we characterise the complexity of all classes of binary Max-CSP instances defined by forbidding ...

Martin C. Cooper; Guillaume Escamocher; Stanislav ivn

2012-10-01T23:59:59.000Z

253

ATLAS Binary Readout IC (ABC) Specification V5.01 21Jul1999 Project Specification  

E-Print Network [OSTI]

ATLAS Binary Readout IC (ABC) Specification V5.01 21­Jul­1999 Project Specification Project Name: ATLAS ATLAS Binary Readout IC (ABC) Specification V5.01 21­Jul­1999 Table of Contents 1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1. ATLAS BINARY FRONT END READOUT ARCHITECTURE

California at Santa Cruz, University of

254

ATLAS Binary Readout IC (ABC) Specification V5.01 21-Jul-1999 Project Specification  

E-Print Network [OSTI]

Page 1 ATLAS Binary Readout IC (ABC) Specification V5.01 21-Jul-1999 Project Specification Project Name: ATLAS Binary Chip (ABC) Version: 5.01 Revision History Revision Change Description, Pages Revised and formatting. M. French 21-Jul-99 #12;Page 2 ATLAS Binary Readout IC (ABC) Specification V5.01 21-Jul-1999

California at Santa Cruz, University of

255

Accurate and efficient waveforms for compact binaries on eccentric orbits  

E-Print Network [OSTI]

Compact binaries that emit gravitational waves in the sensitivity band of ground-based detectors can have non-negligible eccentricities just prior to merger, depending on the formation scenario. We develop a purely analytic, frequency-domain model for gravitational waves emitted by compact binaries on orbits with small eccentricity, which reduces to the quasi-circular post-Newtonian approximant TaylorF2 at zero eccentricity and to the post-circular approximation of Yunes et al. (2009) at small eccentricity. Our model uses a spectral approximation to the (post-Newtonian) Kepler problem to model the orbital phase as a function of frequency, accounting for eccentricity effects up to ${\\cal{O}}(e^8)$ at each post-Newtonian order. Our approach accurately reproduces an alternative time-domain eccentric waveform model for eccentricities $e\\in [0, 0.4]$ and binaries with total mass less than 12 solar masses. As an application, we evaluate the signal amplitude that eccentric binaries produce in different networks of existing and forthcoming gravitational waves detectors. Assuming a population of eccentric systems containing black holes and neutron stars that is uniformly distributed in co-moving volume, we estimate that second generation detectors like Advanced LIGO could detect approximately 0.1-10 events per year out to redshift $z\\sim 0.2$, while an array of Einstein Telescope detectors could detect hundreds of events per year to redshift $z \\sim 2.3$.

E. A. Huerta; Prayush Kumar; Sean T. McWilliams; Richard O'Shaughnessy; Nicolas Yunes

2014-08-14T23:59:59.000Z

256

MULTIWAVELENGTH OBSERVATIONS OF THE RUNAWAY BINARY HD 15137  

SciTech Connect (OSTI)

HD 15137 is an intriguing runaway O-type binary system that offers a rare opportunity to explore the mechanism by which it was ejected from the open cluster of its birth. Here, we present recent blue optical spectra of HD 15137 and derive a new orbital solution for the spectroscopic binary and physical parameters of the O star primary. We also present the first XMM-Newton observations of the system. Fits of the EPIC spectra indicate soft, thermal X-ray emission consistent with an isolated O star. Upper limits on the undetected hard X-ray emission place limits on the emission from a proposed compact companion in the system, and we rule out a quiescent neutron star (NS) in the propeller regime or a weakly accreting NS. An unevolved secondary companion is also not detected in our optical spectra of the binary, and it is difficult to conclude that a gravitational interaction could have ejected this runaway binary with a low mass optical star. HD 15137 may contain an elusive NS in the ejector regime or a quiescent black hole with conditions unfavorable for accretion at the time of our observations.

McSwain, M. Virginia; Aragona, Christina; Marsh, Amber N.; Roettenbacher, Rachael M. [Department of Physics, Lehigh University, Bethlehem, PA 18015 (United States); De Becker, Michael [Institut d'Astrophysique et Geophysique, Universite de Liege, FNRS (Belgium); Roberts, Mallory S. E. [Eureka Scientific, Inc., Oakland, CA 94602-3017 (United States); Boyajian, Tabetha S.; Gies, Douglas R. [Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30302-4106 (United States); Grundstrom, Erika D. [Physics and Astronomy Department, Vanderbilt University, Nashville, TN 37235 (United States)], E-mail: mcswain@lehigh.edu, E-mail: cha206@lehigh.edu, E-mail: anm506@lehigh.edu, E-mail: rmr207@lehigh.edu, E-mail: debecker@astro.ulg.ac.be, E-mail: malloryr@gmail.com, E-mail: tabetha@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: erika.grundstrom@vanderbilt.edu

2010-03-15T23:59:59.000Z

257

Synthesis and characterization of nanocrystalline binary and ternary intermetallic compounds  

E-Print Network [OSTI]

nanocrystalline powders. Using this process, I was able to access several binary and ternary intermetallics, including two new phases: AuCuSn2 and AuNiSn2. These compounds were isolated as nanocrystals using low temperature solution synthesis techniques, which had...

Leonard, Brian Matthew

2009-05-15T23:59:59.000Z

258

Exploiting the relationships among several binary classifiers via data transformation  

Science Journals Connector (OSTI)

The structural resemblance among several existing classifiers has motivated us to investigate their underlying relationships. By exploring into the mapping solutions of these classifiers, we found that they can be linked by simple feature data scaling. ... Keywords: Area under the ROC curve, Binary classification, Deterministic methods, Linear estimation methods

Kar-Ann Toh; Geok-Choo Tan

2014-03-01T23:59:59.000Z

259

Capture Formed Binaries via Encounters with Massive Protostars  

E-Print Network [OSTI]

Most massive stars are found in the center of dense clusters, and have a companion fraction much higher than their lower mass siblings; the massive stars of the Trapezium core in Orion have ~ 1.5 companions each. This high multiplicity could be a consequence of formation via a capture scenario, or it could be due to fragmentation of the cores that form the massive stars. During stellar formation circumstellar disks appear to be nearly ubiquitous. Their large radii compared to stellar sizes increase the interaction radius significantly, suggesting that disk interactions with neighboring stars could assist in capturing binary companions. This mechanism has been studied for stars of approximately solar mass and found to be inefficient. In this paper we present simulations of interactions between a 22 Msun star-disk system and less massive impactors, to study the disk-assisted capture formation of binaries in a regime suited to massive stars. The formation of binaries by capture is found to be much more efficient for massive capturers. We discuss the effects of a mass dependent velocity dispersion and mass segregation on the capture rates, and consider the long term survival of the resultant binaries in a dense cluster.

Nickolas Moeckel; John Bally

2006-10-20T23:59:59.000Z

260

Invertible Symmetric 3 3 Binary Matrices and GQ(2, 4)  

E-Print Network [OSTI]

Invertible Symmetric 3 ? 3 Binary Matrices and GQ(2, 4) Andrea Blunck,1 P´eter L´evay,2 Metod of 27 (disregarding the identity) invertible symmetric 3 ? 3 matrices over GF(2) and the points of invertible symmetric 3 ? 3 matrices over the field GF(2) has 28 elements. The elements different from

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

A detection pipeline for galactic binaries in LISA data  

E-Print Network [OSTI]

The Galaxy is suspected to contain hundreds of millions of binary white dwarf systems, a large fraction of which will have sufficiently small orbital period to emit gravitational radiation in band for space-based gravitational wave detectors such as the Laser Interferometer Space Antenna (LISA). LISA's main science goal is the detection of cosmological events (supermassive black hole mergers, etc.) however the gravitational signal from the galaxy will be the dominant contribution to the data -- including instrumental noise -- over approximately two decades in frequency. The catalogue of detectable binary systems will serve as an unparalleled means of studying the Galaxy. Furthermore, to maximize the scientific return from the mission, the data must be "cleansed" of the galactic foreground. We will present an algorithm that can accurately resolve and subtract >10000 of these sources from simulated data supplied by the Mock LISA Data Challenge Task Force. Using the time evolution of the gravitational wave frequency, we will reconstruct the position of the recovered binaries and show how LISA will sample the entire compact binary population in the Galaxy.

Tyson B. Littenberg

2011-06-30T23:59:59.000Z

262

Optimization Methods for Binary Sequences The Merit Factor Problem  

E-Print Network [OSTI]

Optimization Methods for Binary Sequences ­ The Merit Factor Problem Ron Ferguson, Joshua Knauer SFU MOCAA Project Leader: Peter Borwein MITACS 6th Annual Conference, May, 2005 Abstract Optimization of much interest in combinatorial optimization, communications engineering, and analytic number theory

263

Dixie Valley Binary Cycle Production Data 2013 YTD  

SciTech Connect (OSTI)

Proving the technical and economic feasibility of utilizing the available unused heat to generate additional electric power from a binary power plant from the low-temperature brine at the Dixie Valley Geothermal Power Plant. Monthly data for Jan 2013-September 2013

Lee, Vitaly

2013-10-18T23:59:59.000Z

264

COMPARISON OF KERNELBASED MODELS FOR BINARY CLASSIFICATION OF ENVIRONMENTAL DATA  

E-Print Network [OSTI]

1 COMPARISON OF KERNEL­BASED MODELS FOR BINARY CLASSIFICATION OF ENVIRONMENTAL DATA V. Polishchuk ABSTRACT The task of real­world environmental data classification was approached with different models simulation -- which arise in environmental modeling, classification between two classes may be considered

265

Addendum to Heat and matter transport in binary liquid mixtures  

Science Journals Connector (OSTI)

We recently presented nonequilibrium molecular dynamics simulations of coupled heat and matter transport in a binary liquid mixture. While these simulations were carried out exactly as indicated, the relations given between the microscopic and macroscopic formalism were strictly wrong. Here we correct these errors and indicate how they limit the possibilities for comparison of our simulation results with experiment.

Denis J. Evans and David MacGowan

1987-07-15T23:59:59.000Z

266

Production and Injection data for NV Binary facilities  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Excel files are provided with well production and injection data for binary facilities in Nevada. The files contain the data that reported montly to the Nevada Bureau of Mines and Geology (NBMG) by the facility operators. this data has been complied into Excel spreadsheets for each of the facilities given on the NBMG web site.

Mines, Greg

267

Landscape statistics of the low autocorrelated binary string problem  

E-Print Network [OSTI]

Landscape statistics of the low autocorrelated binary string problem Fernando F. Ferreiraa , Jos, NM 87501, USA Abstract. The statistical properties of the energy landscape of the low autocorrelated disordered models. Using two global measures of landscape structure which have been introduced

Stadler, Peter F.

268

Landscape statistics of the low autocorrelated binary string problem  

E-Print Network [OSTI]

Landscape statistics of the low autocorrelated binary string problem Fernando F. Ferreira a , Jos, NM 87501, USA Abstract. The statistical properties of the energy landscape of the low autocorrelated disordered models. Using two global measures of landscape structure which have been introduced

Stadler, Peter F.

269

Vacancy mediated substitutional diffusion in binary crystalline solids  

E-Print Network [OSTI]

Vacancy mediated substitutional diffusion in binary crystalline solids Anton Van der Ven a,*, Hui coefficients of substi- tutional alloys from first principles. The focus is restricted to vacancy mediated and grain boundaries that can act as vacancy sources) and diffusion in a solid containing a continuous

Ceder, Gerbrand

270

COLLISIONAL EVOLUTION OF ULTRA-WIDE TRANS-NEPTUNIAN BINARIES  

SciTech Connect (OSTI)

The widely separated, near-equal mass binaries hosted by the cold classical Kuiper Belt are delicately bound and subject to disruption by many perturbing processes. We use analytical arguments and numerical simulations to determine their collisional lifetimes given various impactor size distributions and include the effects of mass loss and multiple impacts over the lifetime of each system. These collisional lifetimes constrain the population of small (R {approx}> 1 km) objects currently residing in the Kuiper Belt and confirm that the size distribution slope at small size cannot be excessively steep-likely q {approx}< 3.5. We track mutual semimajor axis, inclination, and eccentricity evolution through our simulations and show that it is unlikely that the wide binary population represents an evolved tail of the primordially tight binary population. We find that if the wide binaries are a collisionally eroded population, their primordial mutual orbit planes must have preferred to lie in the plane of the solar system. Finally, we find that current limits on the size distribution at small radii remain high enough that the prospect of detecting dust-producing collisions in real time in the Kuiper Belt with future optical surveys is feasible.

Parker, Alex H. [Department of Astronomy, University of Victoria, Victoria BC (Canada); Kavelaars, J. J., E-mail: alexhp@uvic.ca [Herzberg Institute of Astrophysics, National Research Council of Canada, Saanich BC (Canada)

2012-01-10T23:59:59.000Z

271

SPECTROSCOPIC METALLICITY DETERMINATIONS FOR W UMa-TYPE BINARY STARS  

SciTech Connect (OSTI)

This study is the first attempt to determine the metallicities of W UMa-type binary stars using spectroscopy. We analyzed about 4500 spectra collected at the David Dunlap Observatory. To circumvent problems caused by the extreme spectral line broadening and blending and by the relatively low quality of the data, all spectra were subject to the same broadening function (BF) processing to determine the combined line strength in the spectral window centered on the Mg I triplet between 5080 A and 5285 A. All individual integrated BFs were subsequently orbital-phase averaged to derive a single line-strength indicator for each star. The star sample was limited to 90 W UMa-type (EW) binaries with the strict phase-constancy of colors and without spectral contamination by spectroscopic companions. The best defined results were obtained for an F-type sub-sample (0.32 < (B - V){sub 0} < 0.62) of 52 binaries for which integrated BF strengths could be interpolated in the model atmosphere predictions. The logarithmic relative metallicities, [M/H], for the F-type sub-sample indicate metal abundances roughly similar to the solar metallicity, but with a large scatter which is partly due to combined random and systematic errors. Because of the occurrence of a systematic color trend resulting from inherent limitations in our approach, we were forced to set the absolute scale of metallicities to correspond to that derived from the m{sub 1} index of the Stroemgren uvby photometry for 24 binaries of the F-type sub-sample. The trend-adjusted metallicities [M/H]{sub 1} are distributed within -0.65 < [M/H]{sub 1} < +0.50, with the spread reflecting genuine metallicity differences between stars. One half of the F-sub-sample binaries have [M/H]{sub 1} within -0.37 < [M/H]{sub 1} < +0.10, a median of -0.04 and a mean of -0.10, with a tail toward low metallicities, and a possible bias against very high metallicities. A parallel study of kinematic data, utilizing the most reliable and recently obtained proper motion and radial velocity data for 78 binaries of the full sample, shows that the F-type sub-sample binaries (44 stars with both velocities and metallicity determinations) have similar kinematic properties to solar-neighborhood, thin-disk dwarfs with space velocity component dispersions: {sigma}U = 33 km s{sup -1}, {sigma}V = 23 km s{sup -1} and {sigma}W = 14 km s{sup -1}. FU Dra with a large spatial velocity, V{sub tot} = 197 km s{sup -1} and [M/H]{sub 1} = -0.6 {+-} 0.2, appears to be the only thick-disk object in the F-type sub-sample. The kinematic data indicate that the F-type EW binaries are typical, thin-disk population stars with ages about 3-5.5 Gyr. The F-type binaries that appear to be older than the rest tend to have systematically smaller mass ratios than most of the EW binaries of the same period.

Rucinski, Slavek M. [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4 (Canada); Pribulla, Theodor; Budaj, Jan, E-mail: rucinski@astro.utoronto.ca, E-mail: pribulla@ta3.sk, E-mail: budaj@ta3.sk [Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranska Lomnica (Slovakia)

2013-09-15T23:59:59.000Z

272

Bottom-up and top-down effects on insects herbivores along a natural salinity gradient in a florida salt marsh.  

E-Print Network [OSTI]

??I compared the strength of bottom- up and top-down effects on insect herbivores along a natural salinity gradient in salt marsh communities in West - (more)

Albarracin, Maria Teresa

2005-01-01T23:59:59.000Z

273

Training a Binary Classifier with the Quantum Adiabatic Algorithm  

E-Print Network [OSTI]

This paper describes how to make the problem of binary classification amenable to quantum computing. A formulation is employed in which the binary classifier is constructed as a thresholded linear superposition of a set of weak classifiers. The weights in the superposition are optimized in a learning process that strives to minimize the training error as well as the number of weak classifiers used. No efficient solution to this problem is known. To bring it into a format that allows the application of adiabatic quantum computing (AQC), we first show that the bit-precision with which the weights need to be represented only grows logarithmically with the ratio of the number of training examples to the number of weak classifiers. This allows to effectively formulate the training process as a binary optimization problem. Solving it with heuristic solvers such as tabu search, we find that the resulting classifier outperforms a widely used state-of-the-art method, AdaBoost, on a variety of benchmark problems. Moreover, we discovered the interesting fact that bit-constrained learning machines often exhibit lower generalization error rates. Changing the loss function that measures the training error from 0-1 loss to least squares maps the training to quadratic unconstrained binary optimization. This corresponds to the format required by D-Wave's implementation of AQC. Simulations with heuristic solvers again yield results better than those obtained with boosting approaches. Since the resulting quadratic binary program is NP-hard, additional gains can be expected from applying the actual quantum processor.

Hartmut Neven; Vasil S. Denchev; Geordie Rose; William G. Macready

2008-11-04T23:59:59.000Z

274

Analysis Of 2H-Evaporator Scale Pot Bottom Sample [HTF-13-11-28H  

SciTech Connect (OSTI)

Savannah River Remediation (SRR) is planning to remove a buildup of sodium aluminosilicate scale from the 2H-evaporator pot by loading and soaking the pot with heated 1.5 M nitric acid solution. Sampling and analysis of the scale material from the 2H evaporator has been performed so that the evaporator can be chemically cleaned beginning July of 2013. Historically, since the operation of the Defense Waste Processing Facility (DWPF), silicon in the DWPF recycle stream combines with aluminum in the typical tank farm supernate to form sodium aluminosilicate scale mineral deposits in the 2H-evaporator pot and gravity drain line. The 2H-evaporator scale samples analyzed by Savannah River National Laboratory (SRNL) came from the bottom cone sections of the 2H-evaporator pot. The sample holder from the 2H-evaporator wall was virtually empty and was not included in the analysis. It is worth noting that after the delivery of these 2H-evaporator scale samples to SRNL for the analyses, the plant customer determined that the 2H evaporator could be operated for additional period prior to requiring cleaning. Therefore, there was no need for expedited sample analysis as was presented in the Technical Task Request. However, a second set of 2H evaporator scale samples were expected in May of 2013, which would need expedited sample analysis. X-ray diffraction analysis (XRD) confirmed the bottom cone section sample from the 2H-evaporator pot consisted of nitrated cancrinite, (a crystalline sodium aluminosilicate solid), clarkeite and uranium oxide. There were also mercury compound XRD peaks which could not be matched and further X-ray fluorescence (XRF) analysis of the sample confirmed the existence of elemental mercury or mercuric oxide. On ''as received'' basis, the scale contained an average of 7.09E+00 wt % total uranium (n = 3; st.dev. = 8.31E-01 wt %) with a U-235 enrichment of 5.80E-01 % (n = 3; st.dev. = 3.96E-02 %). The measured U-238 concentration was 7.05E+00 wt % (n=3, st. dev. = 8.25E-01 wt %). Analyses results for Pu-238 and Pu-239, and Pu-241 are 7.06E-05 {+-} 7.63E-06 wt %, 9.45E-04 {+-} 3.52E-05 wt %, and <2.24E-06 wt %, respectively. These results are provided so that SRR can calculate the equivalent uranium-235 concentrations for the NCSA. Because this 2H evaporator pot bottom scale sample contained a significant amount of elemental mercury (11.7 wt % average), it is recommended that analysis for mercury be included in future Technical Task Requests on 2H evaporator sample analysis at SRNL. Results confirm that the uranium contained in the scale remains depleted with respect to natural uranium. SRNL did not calculate an equivalent U-235 enrichment, which takes into account other fissionable isotopes U-233, Pu-239 and Pu-241.

Oji, L. N.

2013-07-15T23:59:59.000Z

275

Learning Joint Top-Down and Bottom-up Processes for 3D Visual Inference Cristian Sminchisescu  

E-Print Network [OSTI]

-down and bottom-up processing for monocular 3d human motion reconstruction. Learning progresses in alter- native. Introduction Analyzing three-dimensional human motion in real world environments is an actively growing field and surveillance. The problem has been traditionally attacked using the powerful machinery of top-down, generative

Sminchisescu, Cristian

276

Small Businesses Save Big: A Borrower's Guide To Increase the Bottom Line Using Energy Efficiency (Fact Sheet)  

SciTech Connect (OSTI)

Dollars saved through energy efficiency can directly impact your bottom line. Whether you are planning for a major renovation or upgrading individual pieces of building equipment, these improvements can help reduce operating costs, save on utility bills, and boost profits. This fact sheet provides a guide for small businesses to find the resources to increase the energy efficiency of their buildings.

Not Available

2015-01-01T23:59:59.000Z

277

A Top-down and Bottom-up look at Emissions Abatement in Germany in response to the EU ETS  

E-Print Network [OSTI]

This paper uses top-down trend analysis and a bottom-up power sector model to define upper and lower boundaries on abatement in Germany in the first phase of the EU Emissions Trading Scheme (2005-2007). Long-term trend ...

Feilhauer, Stephan M. (Stephan Marvin)

2008-01-01T23:59:59.000Z

278

Warming shifts top-down and bottom-up control of pond food web structure and function  

Science Journals Connector (OSTI)

...top-down and bottom-up control of pond food web structure and function Jonathan B. Shurin...structuring experimental freshwater pond food webs in western Canada over 16 months. Experimental...temperatures produced top-heavy food webs with lower biomass of benthic and pelagic...

2012-01-01T23:59:59.000Z

279

Energy efficiency and the cost of GHG abatement: A comparison of bottom-up and hybrid models for the US  

E-Print Network [OSTI]

Energy efficiency and the cost of GHG abatement: A comparison of bottom-up and hybrid models of energy efficiency potential and green- house gas (GHG) abatement potential that have been highly, and that profitable energy efficiency improvements are the reason. For the US, McKinsey estimates that GHG emissions

280

Detection of Nosema apis and N. ceranae in honeybee bottom scraps and frass in naturally infected hives  

E-Print Network [OSTI]

Detection of Nosema apis and N. ceranae in honeybee bottom scraps and frass in naturally infected Abstract ­ Current sampling methods for identification of honeybee microsporidians (Nosema apis and Nosema ceranae) involve killing adult honeybees. The current study monitored the presence of N. apis and N

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


281

Measurement of the masses and widths of the bottom baryons ?b[superscript ] and ?b*[superscript  

E-Print Network [OSTI]

Using data from pp? collisions at ?s=1.96??TeV recorded by the CDF II detector at the Fermilab Tevatron, we present improved measurements of the masses and first measurements of natural widths of the four bottom baryon ...

Gomez-Ceballos, Guillelmo

282

Arsenic remediation of drinking water using iron-oxide coated coal bottom ash  

SciTech Connect (OSTI)

We describe laboratory and field results of a novel arsenic removal adsorbent called 'Arsenic Removal Using Bottom Ash' (ARUBA). ARUBA is prepared by coating particles of coal bottom ash, a waste material from coal fired power plants, with iron (hydr)oxide. The coating process is simple and conducted at room temperature and atmospheric pressure. Material costs for ARUBA are estimated to be low (~;;$0.08 per kg) and arsenic remediation with ARUBA has the potential to be affordable to resource-constrained communities. ARUBA is used for removing arsenic via a dispersal-and-removal process, and we envision that ARUBA would be used in community-scale water treatment centers. We show that ARUBA is able to reduce arsenic concentrations in contaminated Bangladesh groundwater to below the Bangladesh standard of 50 ppb. Using the Langmuir isotherm (R2 = 0.77) ARUBA's adsorption capacity in treating real groundwater is 2.6x10-6 mol/g (0.20 mg/g). Time-to-90percent (defined as the time interval for ARUBA to remove 90percent of the total amount of arsenic that is removed at equilibrium) is less than one hour. Reaction rates (pseudo-second-order kinetic model, R2>_ 0.99) increase from 2.4x105 to 7.2x105 g mol-1 min-1 as the groundwater arsenic concentration decreases from 560 to 170 ppb. We show that ARUBA's arsenic adsorption density (AAD), defined as the milligrams of arsenic removed at equilibrium per gram of ARUBA added, is linearly dependent on the initial arsenic concentration of the groundwater sample, for initial arsenic concentrations of up to 1600 ppb and an ARUBA dose of 4.0 g/L. This makes it easy to determine the amount of ARUBA required to treat a groundwater source when its arsenic concentration is known and less than 1600 ppb. Storing contaminated groundwater for two to three days before treatment is seen to significantly increase ARUBA's AAD. ARUBA can be separated from treated water by coagulation and clarification, which is expected to be less expensive than filtration of micron-scale particles, further contributing to the affordability of a community-scale water treatment center.

MATHIEU, JOHANNA L.; GADGIL, ASHOK J.; ADDY, SUSAN E.A.; KOWOLIK, KRISTIN

2010-06-01T23:59:59.000Z

283

A summary of SNCR applications to two coal-fired wet bottom boilers  

SciTech Connect (OSTI)

In response to NO{sub x} reductions mandated under Title I of the 1990 Clean Air Act Amendments (CAAA), Public Service Electric & Gas and Atlantic Electric of New Jersey evaluated Selective Non-Catalytic Reduction (SNCR) for NO{sub x} control under separate programs at Mercer Station and B.L. England Station, respectively. Mercer Station is comprised of twin 321 MW Foster Wheeler coal-fired wet bottom boilers, with natural gas capability up to 100% load. B.L. England Station has three units, two of which are cyclone boilers of 136 MW and 163 MW. These furnace designs are of particular interest in that nominally 23,000 MW of cyclone boiler capacity and 6,900 MW of wall- or turbo-fired wet bottom boiler capacity will be faced with NO{sub x} reductions to be mandated under Title IV - Phase II for Group II boilers. Both stations evaluated Nalco Fuel Tech`s SNCR system using a portable test skid, with urea as the reducing chemical. The Mercer Unit 2 demonstration was performed with a low sulfur coal (nominally 0.8%), while the B.L. England Unit 1 demonstration utilized a medium sulfur coal (nominally 2.4%), and also re-injects fly ash back into the cyclones for ultimate collection and removal as slag. To address concerns over potential Ljungstrom air heater fouling, due to reactions between ammonia and SO{sub 3} in the air heater, and fly ash salability at Mercer Station, both sites targeted no greater than 5-10 ppmv ammonia emissions at the economizer exit. At Mercer Unit 2, air heater fouling was only experienced during system start-up when the ammonia emissions at the economizer exit were estimated at levels approaching 60 ppmv. B.L. England Unit 1, however, experienced frequent fouling of the air heater. NO{sub x} reductions achieved at both sites ranged between 30%-40% from nominal baseline NO{sub x} levels of 1.1-1.6 lb/MMBtu. Each site is currently undergoing installation of commercial SNCR systems.

Himes, R.; Hubbard, D.; West, Z. [Carnot, Tustin, CA (United States)] [and others

1996-01-01T23:59:59.000Z

284

Weight and power optimization of steam bottoming cycle for offshore oil and gas installations  

Science Journals Connector (OSTI)

Abstract Offshore oil and gas installations are mostly powered by simple cycle gas turbines. To increase the efficiency, a steam bottoming cycle could be added to the gas turbine. One of the keys to the implementation of combined cycles on offshore oil and gas installations is for the steam cycle to have a low weight-to-power ratio. In this work, a detailed combined cycle model and numerical optimization tools were used to develop designs with minimum weight-to-power ratio. Within the work, single-objective optimization was first used to determine the solution with minimum weight-to-power ratio, then multi-objective optimization was applied to identify the Pareto frontier of solutions with maximum power and minimum weight. The optimized solution had process variables leading to a lower weight of the heat recovery steam generator while allowing for a larger steam turbine and condenser to achieve a higher steam cycle power output than the reference cycle. For the multi-objective optimization, the designs on the Pareto front with a weight-to-power ratio lower than in the reference cycle showed a high heat recovery steam generator gas-side pressure drop and a low condenser pressure.

Lars O. Nord; Emanuele Martelli; Olav Bolland

2014-01-01T23:59:59.000Z

285

Measurements of Direct CP-Violating Asymmetries in Charmless Decays of Bottom Baryons  

E-Print Network [OSTI]

We report final measurements of direct $\\mathit{CP}$--violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete $\\sqrt{s}=1.96$ TeV proton-antiproton collisions data set, corresponding to 9.3 fb$^{-1}$ of integrated luminosity, we measure $\\mathcal{A}(\\Lambda^0_b \\rightarrow p\\pi^{-}) = +0.06 \\pm 0.07\\mathrm{(stat)} \\pm 0.03\\mathrm{(syst)}$ and $\\mathcal{A}(\\Lambda^0_b \\rightarrow pK^{-}) = -0.10 \\pm 0.08\\mathrm{(stat)} \\pm 0.04\\mathrm{(syst)}$, compatible with no asymmetry. In addition we measure the $\\mathit{CP}$--violating asymmetries in $B^0_s \\rightarrow K^{-}\\pi^{+}$ and $B^0 \\rightarrow K^{+}\\pi^{-}$ decays to be $\\mathcal{A}(B^0_s \\rightarrow K^{-}\\pi^{+}) = +0.22 \\pm 0.07\\mathrm{stat)} \\pm 0.02\\mathrm{(syst)}$ and $\\mathcal{A}(B^0 \\rightarrow K^{+}\\pi^{-}) = -0.083\\pm 0.013 \\mathrm{(stat)} \\pm 0.004\\mathrm{(syst)}$, respectively, which are significantly different from zero and consistent with current world averages.

CDF Collaboration; T. Aaltonen; S. Amerio; D. Amidei; A. Anastassov; A. Annovi; J. Antos; G. Apollinari; J. A. Appel; T. Arisawa; A. Artikov; J. Asaadi; W. Ashmanskas; B. Auerbach; A. Aurisano; F. Azfar; W. Badgett; T. Bae; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; P. Barria; P. Bartos; M. Bauce; F. Bedeschi; S. Behari; G. Bellettini; J. Bellinger; D. Benjamin; A. Beretvas; A. Bhatti; K. R. Bland; B. Blumenfeld; A. Bocci; A. Bodek; D. Bortoletto; J. Boudreau; A. Boveia; L. Brigliadori; C. Bromberg; E. Brucken; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; P. Bussey; P. Butti; A. Buzatu; A. Calamba; S. Camarda; M. Campanelli; F. Canelli; B. Carls; D. Carlsmith; R. Carosi; S. Carrillo; B. Casal; M. Casarsa; A. Castro; P. Catastini; D. Cauz; V. Cavaliere; M. Cavalli-Sforza; A. Cerri; L. Cerrito; Y. C. Chen; M. Chertok; G. Chiarelli; G. Chlachidze; K. Cho; D. Chokheli; A. Clark; C. Clarke; M. E. Convery; J. Conway; M. Corbo; M. Cordelli; C. A. Cox; D. J. Cox; M. Cremonesi; D. Cruz; J. Cuevas; R. Culbertson; N. d'Ascenzo; M. Datta; P. de Barbaro; L. Demortier; L. Marchese; M. Deninno; F. Devoto; M. D'Errico; A. Di Canto; B. Di Ruzza; J. R. Dittmann; M. D'Onofrio; S. Donati; M. Dorigo; A. Driutti; K. Ebina; R. Edgar; A. Elagin; R. Erbacher; S. Errede; B. Esham; S. Farrington; J. P. Fernndez Ramos; R. Field; G. Flanagan; R. Forrest; M. Franklin; J. C. Freeman; H. Frisch; Y. Funakoshi; C. Galloni; A. F. Garfinkel; P. Garosi; H. Gerberich; E. Gerchtein; S. Giagu; V. Giakoumopoulou; K. Gibson; C. M. Ginsburg; N. Giokaris; P. Giromini; G. Giurgiu; V. Glagolev; D. Glenzinski; M. Gold; D. Goldin; A. Golossanov; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. Gonzlez Lpez; I. Gorelov; A. T. Goshaw; K. Goulianos; E. Gramellini; S. Grinstein; C. Grosso-Pilcher; R. C. Group; J. Guimaraes da Costa; S. R. Hahn; J. Y. Han; F. Happacher; K. Hara; M. Hare; R. F. Harr; T. Harrington-Taber; K. Hatakeyama; C. Hays; J. Heinrich; M. Herndon; A. Hocker; Z. Hong; W. Hopkins; S. Hou; R. E. Hughes; U. Husemann; M. Hussein; J. Huston; G. Introzzi; M. Iori; A. Ivanov; E. James; D. Jang; B. Jayatilaka; E. J. Jeon; S. Jindariani; M. Jones; K. K. Joo; S. Y. Jun; T. R. Junk; M. Kambeitz; T. Kamon; P. E. Karchin; A. Kasmi; Y. Kato; W. Ketchum; J. Keung; B. Kilminster; D. H. Kim; H. S. Kim; J. E. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; Y. J. Kim; N. Kimura; M. Kirby; K. Knoepfel; K. Kondo; D. J. Kong; J. Konigsberg; A. V. Kotwal; M. Kreps; J. Kroll; M. Kruse; T. Kuhr; M. Kurata; A. T. Laasanen; S. Lammel; M. Lancaster; K. Lannon; G. Latino; H. S. Lee; J. S. Lee; S. Leo; S. Leone; J. D. Lewis; A. Limosani; E. Lipeles; A. Lister; H. Liu; Q. Liu; T. Liu; S. Lockwitz; A. Loginov; A. Luc; D. Lucchesi; J. Lueck; P. Lujan; P. Lukens; G. Lungu; J. Lys; R. Lysak; R. Madrak; P. Maestro; S. Malik; G. Manca; A. Manousakis-Katsikakis; F. Margaroli; P. Marino; M. Martnez; K. Matera; M. E. Mattson; A. Mazzacane; P. Mazzanti; R. McNulty; A. Mehta; P. Mehtala; C. Mesropian; T. Miao; D. Mietlicki; A. Mitra; H. Miyake; S. Moed; N. Moggi; C. S. Moon; R. Moore; M. J. Morello; A. Mukherjee; Th. Muller; P. Murat; M. Mussini; J. Nachtman; Y. Nagai; J. Naganoma; I. Nakano; A. Napier; J. Nett; C. Neu; T. Nigmanov; L. Nodulman; S. Y. Noh; O. Norniella; L. Oakes; S. H. Oh; Y. D. Oh; I. Oksuzian; T. Okusawa; R. Orava; L. Ortolan; C. Pagliarone; E. Palencia; P. Palni; V. Papadimitriou; W. Parker; G. Pauletta; M. Paulini; C. Paus; T. J. Phillips; G. Piacentino; E. Pianori; J. Pilot; K. Pitts; C. Plager; L. Pondrom; S. Poprocki; K. Potamianos; F. Prokoshin; A. Pranko; F. Ptohos; G. Punzi; N. Ranjan; I. Redondo Fernndez; P. Renton; M. Rescigno; F. Rimondi; L. Ristori; A. Robson; T. Rodriguez; S. Rolli; M. Ronzani; R. Roser; J. L. Rosner; F. Ruffini; A. Ruiz; J. Russ; V. Rusu; W. K. Sakumoto; Y. Sakurai; L. Santi; K. Sato; V. Saveliev; A. Savoy-Navarro; P. Schlabach; E. E. Schmidt; T. Schwarz; L. Scodellaro; F. Scuri; S. Seidel; Y. Seiya; A. Semenov; F. Sforza; S. Z. Shalhout; T. Shears; P. F. Shepard; M. Shimojima; M. Shochet; I. Shreyber-Tecker; A. Simonenko; K. Sliwa; J. R. Smith; F. D. Snider; V. Sorin; H. Song; M. Stancari; R. St. Denis; D. Stentz; J. Strologas; Y. Sudo; A. Sukhanov; I. Suslov; K. Takemasa; Y. Takeuchi; J. Tang; M. Tecchio; P. K. Teng; J. Thom; E. Thomson; V. Thukral; D. Toback; S. Tokar; K. Tollefson; T. Tomura; D. Tonelli; S. Torre; D. Torretta; P. Totaro; M. Trovato; F. Ukegawa; S. Uozumi; F. Vzquez; G. Velev; C. Vellidis; C. Vernieri; M. Vidal; R. Vilar; J. Vizn; M. Vogel; G. Volpi; P. Wagner; R. Wallny; S. M. Wang; D. Waters; W. C. Wester III; D. Whiteson; A. B. Wicklund; S. Wilbur; H. H. Williams; J. S. Wilson; P. Wilson; B. L. Winer; P. Wittich; S. Wolbers; H. Wolfe; T. Wright; X. Wu; Z. Wu; K. Yamamoto; D. Yamato; T. Yang; U. K. Yang; Y. C. Yang; W. -M. Yao; G. P. Yeh; K. Yi; J. Yoh; K. Yorita; T. Yoshida; G. B. Yu

2014-12-11T23:59:59.000Z

286

Analysis of core damage frequency: Peach Bottom, Unit 2 internal events appendices  

SciTech Connect (OSTI)

This document contains the appendices for the accident sequence analysis of internally initiated events for the Peach Bottom, Unit 2 Nuclear Power Plant. This is one of the five plant analyses conducted as part of the NUREG-1150 effort for the Nuclear Regulatory Commission. The work performed and described here is an extensive reanalysis of that published in October 1986 as NUREG/CR-4550, Volume 4. It addresses comments from numerous reviewers and significant changes to the plant systems and procedures made since the first report. The uncertainty analysis and presentation of results are also much improved, and considerable effort was expended on an improved analysis of loss of offsite power. The content and detail of this report is directed toward PRA practitioners who need to know how the work was done and the details for use in further studies. The mean core damage frequency is 4.5E-6 with 5% and 95% uncertainty bounds of 3.5E-7 and 1.3E-5, respectively. Station blackout type accidents (loss of all ac power) contributed about 46% of the core damage frequency with Anticipated Transient Without Scram (ATWS) accidents contributing another 42%. The numerical results are driven by loss of offsite power, transients with the power conversion system initially available operator errors, and mechanical failure to scram. 13 refs., 345 figs., 171 tabs.

Kolaczkowski, A.M.; Cramond, W.R.; Sype, T.T.; Maloney, K.J.; Wheeler, T.A.; Daniel, S.L. (Science Applications International Corp., Albuquerque, NM (USA); Sandia National Labs., Albuquerque, NM (USA))

1989-08-01T23:59:59.000Z

287

Characterization plan for Fort St. Vrain and Peach Bottom graphite fuels  

SciTech Connect (OSTI)

Part of Fort St. Vrain (FSV) and most of the Peach Bottom (PB) reactor spent fuels are currently stored at INEL and may remain in storage for many years before disposal. Three disposal pathways have been proposed: intact disposal, fuels partially disassembled and the high-level waste fraction conditioned prior to disposal, and fuels completed disassembled and conditioned prior to disposal. Many options exist within each of these pathways. PNL evaluated the literature and other reference to develop a fuels characterization plan for these fuels. This plan provides guidance for the characteristics of the fuel which will be needed to pursue any of the storage or disposal pathways. It also provides a suggested fuels monitoring program for the current storage facilities. This report recommends a minimum of 7 fuel elements be characterized: PB Core 1 fuel: one Type II nonfailed element, one Type II failed element, and one Type III nonfailed element; PB Core 2 fuel: two Type II nonfailed fuel elements; and FSV fuel: at least two fuel blocks from regions of high temperature and fluence and long in-reactor performance (preferably at reactor end-of- life). Selection of PB fuel elements should focus on these between radial core position 8 and 14 and on compacts between compact numbers 10 and 20. Selection of FSV fuel elements should focus on these from Fuel Zones II and III, located in Core Layers 6, 7, and possibly 8.

Maarschman, S.C.; Berting, F.M.; Clemmer, R.G.; Gilbert, E.R.; Guenther, R.J.; Morgan, W.C.; Sliva, P.

1993-09-01T23:59:59.000Z

288

Diverter bop system and method for a bottom supported offshore drilling rig  

SciTech Connect (OSTI)

A system and method for installing a fluid flow controller and telescoping spools beneath an offshore bottom supported drilling rig rotary table is disclosed. Upper and lower telescoping spools are provided for initially connecting a Diverter/BOP convertible fluid flow controller between structural casing in the well and a permanent housing beneath the drilling rig rotary table. Clamp means are provided for clamping the rig vent line to an opening in the housing wall of the fluid flow controller during drilling of the borehole through the structural casing in preparation for setting and cementing the conductor casing. In that mode, the system is adapted as a diverter system. After the well is drilled for the conductor casing and the conductor casing is cemented and cut off at its top, a mandrel is fitted at the top of the conductor casing to which the lower end of the lower spool may be connected. The system may be used in this configuration as a diverter system, or after removal of the vent line and connection of a kill line to the housing outlet, the system may be used as a low pressure blowout preventer system.

Roche, J. R.; Alexander, G. G.; Carbaugh, W. L.

1985-06-25T23:59:59.000Z

289

Fin whale song characteristics recorded on ocean bottom seismometers in the Northeast Pacific Ocean  

Science Journals Connector (OSTI)

Fin whales produce low frequency sequences of vocalizations that can be detected opportunistically on ocean bottom seismometers (OBSs). Using an automatic detection algorithm we have analyzed fin whale calls recorded on OBSs in the Northeast Pacific Ocean over broad spatial and temporal scales. The Cascadia Initiative experiment consists of 70 OBSs deployed for a total of four years (20112015). It extends from Vancouver Island to Cape Mendocino and several hundred kilometers offshore. Additional OBS data that overlap spatially with the northern portion of the Cascadia Initiative instruments are available from the Neptune Canada cabled observatory which has been online since 2009 and from standalone deployments between 2003 and 2006. With this study we examine call characteristics and seasonal call counts for patterns that might indicate migratory movements or distinct acoustic populations. Both frequency and inter-pulse interval (IPI) are automatically extracted for each detected call and seasonal and inter-annual calling patterns are examined using daily binned call count histograms. Preliminary analysis of a subset of Cascadia Initiative data from 2011 to 2013 shows a dominant sequence of alternating classic and backbeat calls at center frequencies of 20 and 18.5 Hz respectively and preceding IPIs of 16 and 18 s respectively.

2014-01-01T23:59:59.000Z

290

Two Paths to Transforming Markets through Public Sector EnergyEfficiency: Bottom Up versus Top Down  

SciTech Connect (OSTI)

The evolution of government purchasing initiatives in Mexicoand China, part of the PEPS (Promoting an Energy-efficient Public Sector)program, demonstrates the need for flexibility in designingenergy-efficiency strategies in the public sector. Several years ofpursuing a top-down (federally led) strategy in Mexico produced fewresults, and it was not until the program was restructured in 2004 tofocus on municipal-level purchasing that the program gained momentum.Today, a new partnership with the Mexican federal government is leadingto an intergovernmental initiative with strong support at the federallevel. By contrast, the PEPS purchasing initiative in China wassuccessfully initiated and led at the central government level withstrategic support from international experts. The very different successtrajectories in these two countries provide valuable lessons fordesigning country-specific public sector energy-efficiency initiatives.Enabling conditions for any successful public sector purchasinginitiative include the existence of mandatory energy-efficiencyperformance standards, an effective energy-efficiency endorsementlabeling program, an immediate need for energy conservation, a simplepilot phase (focusing on a limited number of strategically chosenproducts), and specialized technical assistance. Top-down purchasingprograms are likely to be more successful where there is high-levelpolitical endorsement and a national procurement law in place, supportedby a network of trained purchasers. Bottom-up (municipally led)purchasing programs require that municipalities have the authority to settheir own purchasing policies, and also benefit from existing networks ofcities, supported by motivated municipal leaders and trained purchasingofficials.

Van Wie McGrory, Laura; Coleman, Philip; Fridley, David; Harris,Jeffrey; Villasenor Franco, Edgar

2006-05-10T23:59:59.000Z

291

Excited-state spectroscopy of triply-bottom baryons from lattice QCD  

SciTech Connect (OSTI)

The spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with J{sup P} = 1/2{sup +}, 3/2{sup +}, 5/2{sup +}, 7/2{sup +}, 1/2{sup -}, and 3/2{sup -} are determined with high precision. A domain-wall action is used for the up-, down- and strange quarks, and the bottom quarks are implemented with NRQCD. The computations are done at lattice spacings of a {approx} 0.11 fm and a {approx} 0.08 fm, and the results demonstrate the improvement of rotational symmetry as a is reduced. A large lattice volume of (2.7 fm){sup 3} is used, and extrapolations of the bbb spectrum to realistic values of the light sea-quark masses are performed. All spin-dependent energy splittings are resolved with total uncertainties of order 1 MeV, and the dependence of these splittings on the couplings in the NRQCD action is analyzed.

Stefan Meinel

2012-06-01T23:59:59.000Z

292

Motion compensation method for moving pictures with binary shape  

Science Journals Connector (OSTI)

This paper describes a motion compensation method for arbitrarily shaped moving visual objects. To utilise both the inter-frame correlation and the texture-shape correlation, we use macroblock-based motion compensation for binary shape coding as well as texture coding. To efficiently achieve motion compensation for a moving binary shape, we introduce extra motion vectors for the shape coding in addition to the texture motion vectors, where the shape motion vectors are coded by referring to the texture motion vectors. The proposed method can successfully save more than 50% of the number of bits in comparison with the intra-only method. The effectiveness of the proposed method has been established through MPEG4 standardisation activity, and the proposed motion-compensation framework has been adopted by the MPEG-4 visual coding standard (ISO 14496-2).

Shinya Kadono; Choong Seng Boon; Minoru Etoh

2000-01-01T23:59:59.000Z

293

General Relativistic Binary Merger Simulations and Short Gamma Ray Bursts  

E-Print Network [OSTI]

The recent localization of some short-hard gamma ray bursts (GRBs) in galaxies with low star formation rates has lent support to the suggestion that these events result from compact object binary mergers. We discuss how new simulations in general relativity are helping to identify the central engine of short-hard GRBs. Motivated by our latest relativistic black hole-neutron star merger calculations, we discuss a scenario in which these events may trigger short-hard GRBs, and compare this model to competing relativistic models involving binary neutron star mergers and the delayed collapse of hypermassive neutron stars. Distinguishing features of these models may help guide future GRB and gravitational wave observations to identify the nature of the sources.

Joshua A. Faber; Thomas W. Baumgarte; Stuart L. Shapiro; Keisuke Taniguchi

2006-03-10T23:59:59.000Z

294

Supersaturated Turbine Expansions for Binary Geothermal Power Plants  

SciTech Connect (OSTI)

The Heat Cycle Research project is developing the technology base that will permit a much greater utilization of the moderate-temperature, liquid-dominated geothermal resources, particularly for the generation of electrical power. The emphasis in the project has been the improvement of the performance of binary power cycles. The investigations have been examining concepts projected to improve the brine utilization by 20% relative to a ''Heber-type'' binary plant; these investigations are nearing completion. preparations are currently underway in the project to conduct field investigations of the condensation behavior of supersaturated turbine expansions. These investigations will evaluate whether the projected additional 8% to 10% improvement in brine utilization can be realized by allowing these expansions. Future program efforts will focus on the problems associated with heat rejection and on the transfer of the technology being developed to industry.

Bliem, C.J.; Mines, G.L.

1992-03-24T23:59:59.000Z

295

Vibrated polar disks: spontaneous motion, binary collisions, and collective dynamics  

E-Print Network [OSTI]

We study the spontaneous motion, binary collisions, and collective dynamics of "polar disks", i.e. purpose-built particles which, when vibrated between two horizontal plates, move coherently along a direction strongly correlated to their intrinsic polarity. The motion of our particles, although nominally three-dimensional and complicated, is well accounted for by a two-dimensional persistent random walk. Their binary collisions are spatiotemporally extended events during which multiple actual collisions happen, yielding a weak average effective alignment. We show that this well-controlled, "dry active matter" system can display collective motion with orientationally-ordered regions of the order of the system size. We provide evidence of strong number density in the most ordered regimes observed. These results are discussed in the light of the limitations of our system, notably those due to the inevitable presence of walls.

Julien Deseigne; Sbastien Lonard; Olivier Dauchot; Hugues Chat

2012-01-29T23:59:59.000Z

296

Short Gamma-Ray Bursts from Binary Neutron Star Mergers  

E-Print Network [OSTI]

We present the results from new relativistic hydrodynamic simulations of binary neutron star mergers using realistic non-zero temperature equations of state. We vary several unknown parameters in the system such as the neutron star (NS) masses, their spins and the nuclear equation of state. The results are then investigated with special focus on the post-merger torus-remnant system. Observational implications on the Gamma-ray burst (GRB) energetics are discussed and compared with recent observations.

Roland Oechslin; Thomas Janka

2006-04-27T23:59:59.000Z

297

Coal liquefaction process using pretreatment with a binary solvent mixture  

DOE Patents [OSTI]

An improved process for thermal solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprises pretreating the coal with a binary mixture of an aromatic hydrocarbon and an aliphatic alcohol at a temperature below 300 C before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil. 1 fig.

Miller, R.N.

1986-10-14T23:59:59.000Z

298

Gravitational-wave modes from precessing black-hole binaries  

E-Print Network [OSTI]

Gravitational waves from precessing black-hole binaries exhibit features that are absent in nonprecessing systems. The most prominent of these is a parity-violating asymmetry that beams energy and linear momentum preferentially along or opposite to the orbital angular momentum, leading to recoil of the binary. The asymmetry will appear as amplitude and phase modulations at the orbital frequency. For strongly precessing systems, it accounts for at least 3% amplitude modulation for binaries in the sensitivity band of ground-based gravitational-wave detectors, and can exceed 50% for massive systems. Such asymmetric features are also clearly visible when the waves are decomposed into modes of spin-weighted spherical harmonics, and are inherent in the waves themselves---rather than resulting from residual eccentricity in numerical simulations, or from mode-mixing due to precession. In particular, there is generically no instantaneous frame for which the mode decomposition will have any symmetry. We introduce a method to simplify the expressions for waveforms given in analytical relativity, which can be used to combine existing high-order waveforms for nonprecessing systems with expressions for the precessing contributions, leading to improved accuracy and a unified treatment of precessing and nonprecessing binaries. Using this method, it is possible to clarify the nature and the origins of the asymmetries and show the effects of asymmetry on recoils more clearly. We present post-Newtonian (PN) expressions for the waveform modes that include these terms, complete to the relative 2PN level in spin (proportional to $v^4/c^4$ times a certain combination of the spins). Comparing the results of those expressions to numerical results, we find good qualitative agreement. We also demonstrate how these expressions can be used to efficiently calculate waveforms for gravitational-wave astronomy.

Michael Boyle; Lawrence E. Kidder; Serguei Ossokine; Harald P. Pfeiffer

2014-09-15T23:59:59.000Z

299

The Binary Nature of PSR J2032+4127  

E-Print Network [OSTI]

PSR J2032+4127 is a gamma-ray and radio-emitting pulsar which has been regarded as a young luminous isolated neutron star. However, its recent spin-down rate has extraordinarily increased by a factor of two. We present evidence that this is due to its motion as a member of a highly-eccentric binary system with a 15-solar-mass Be star, MT91~213. Timing observations show that, not only are the positions of the two stars coincident within 0.4 arcsec, but timing models of binary motion of the pulsar fit the data much better than a model of a young isolated pulsar. MT91~213, and hence the pulsar, lie in the Cyg~OB2 stellar association, which is at a distance of only 1.4-1.7 kpc. The pulsar is currently on the near side of, and accelerating towards, the Be star, with an orbital period of 20-30 years. The next periastron is well-constrained to occur in early 2018, providing an opportunity to observe enhanced high-energy emission as seen in other Be-star binary systems.

Lyne, Andrew; Keith, Michael; Ray, Paul; Kerr, Matthew; Camilo, Fernando; Johnson, Tyrel

2015-01-01T23:59:59.000Z

300

NuSTAR Observations of X-Ray Binaries  

E-Print Network [OSTI]

As of 2014 August, the Nuclear Spectroscopic Telescope Array (NuSTAR) had observed ~30 X-ray binaries either as part of the planned program, as targets of opportunity, or for instrument calibration. The main science goals for the observations include probing the inner part of the accretion disk and constraining black hole spins via reflection components, providing the first observations of hard X-ray emission from quiescent Low Mass X-ray Binaries (LMXBs), measuring cyclotron lines from accreting pulsars, and studying type I X-ray bursts from neutron stars. Here, we describe the science objectives in more depth and give an overview of the NuSTAR observations that have been carried out to achieve the objectives. These include observation of four "IGR" High Mass X-ray Binaries (HMXBs) discovered by INTEGRAL. We also summarize the results that have been obtained and their implications. Among the IGR HMXBs, we focus on the discovery of a cyclotron line in the spectrum of IGR J17544-2619.

Tomsick, John A; Fuerst, Felix; Harrison, Fiona; Miyasaka, Hiromasa; Tendulkar, Shriharsh; Bhalerao, Varun; Chakrabarty, Deepto; King, Ashley; Miller, Jon M; Natalucci, Lorenzo; Stern, Daniel

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Development of Radar Navigation and Radio Data Transmission for Microhole Coiled Tubing Bottom Hole Assemblies  

SciTech Connect (OSTI)

This Final Technical Report summarizes the research and development (R&D) work performed by Stolar Research Corporation (Stolar) under U.S. Department of Energy (DOE) Contract Number DE-FC26-04NT15477. This work involved the development of radar navigation and radio data transmission systems for integration with microhole coiled tubing bottom hole assemblies. Under this contract, Stolar designed, fabricated, and laboratory and field tested two advanced technologies of importance to the future growth of the U.S. oil and gas industry: (1) real-time measurement-while-drilling (MWD) for guidance and navigation of coiled tubing drilling in hydrocarbon reservoirs and (2) two-way inductive radio data transmission on coiled tubing for real-time, subsurface-to-surface data transmission. The operating specifications for these technologies are compatible with 3.5-inch boreholes drilled to a true vertical depth (TVD) of 5,000 feet, which is typical of coiled tubing drilling applications. These two technologies (i.e., the Stolar Data Transmission System and Drill String Radar) were developed into pre-commercial prototypes and tested successfully in simulated coiled tubing drilling conditions. Integration of these two technologies provides a real-time geosteering capability with extremely quick response times. Stolar is conducting additional work required to transition the Drill String Radar into a true commercial product. The results of this advanced development work should be an important step in the expanded commercialization of advanced coiled tubing microhole drilling equipment for use in U.S. hydrocarbon reservoirs.

Larry G. Stolarczyk; Gerald L. Stolarczyk; Larry Icerman; John Howard; Hooman Tehrani

2007-03-25T23:59:59.000Z

302

Terra-Gen Power and TAS Celebrate Innovative Binary Geothermal Technology |  

Open Energy Info (EERE)

and TAS Celebrate Innovative Binary Geothermal Technology and TAS Celebrate Innovative Binary Geothermal Technology Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Terra-Gen Power and TAS Celebrate Innovative Binary Geothermal Technology Abstract N/A Authors Terra-Gen Power and LLC Published Publisher Not Provided, Date Not Provided DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Terra-Gen Power and TAS Celebrate Innovative Binary Geothermal Technology Citation Terra-Gen Power, LLC. Terra-Gen Power and TAS Celebrate Innovative Binary Geothermal Technology [Internet]. [updated 2011;cited 2011]. Available from: http://www.terra-genpower.com/News/TERRA-GEN-POWER-AND-TAS-CELEBRATE-INNOVATIVE-BINAR.aspx Retrieved from "http://en.openei.org/w/index.php?title=Terra-Gen_Power_and_TAS_Celebrate_Innovative_Binary_Geothermal_Technology&oldid=682514

303

Flow from a Tank Consider water flowing from a tank with water through a hole in its bottom. Denote  

E-Print Network [OSTI]

Flow from a Tank Consider water flowing from a tank with water through a hole in its bottom. Denote by h(t) the height of water in the tank at time t, v(t) the speed of the water leaving through the hole at time t, A(h) the cross-sectional area of the tank at height h and a the cross- sectional area

Feldman, Joel

304

Applying bottom-up analysis to identify the system boundaries of non-energy use data in international energy statistics  

Science Journals Connector (OSTI)

Data on the non-energy use of fossil fuels in energy statistics are subject to major uncertainties. We apply a simple bottom-up methodology to recalculate non-energy use for the entire world and for the 50 countries with the highest consumption of fossil fuels for non-energy purposes. We quantify worldwide non-energy use in the year 2000 to be 242exajoules (EJ), thereby accounting for 6% of the global total primary energy supply (TPES). Our bottom-up estimates are in line with data from international energy statistics for the entire world and for 14 individual countries. Our estimates exceed official non-energy use data for 22 countries, whereas they are lower than official data in the case of 14 countries. Inconsistent system boundaries of non-energy use data in international energy statistics can explain parts of the observed deviations. We regard our bottom-up methodology as reliable albeit being attached with uncertainties. We recommend its use for energy statisticians and greenhouse gas (GHG) inventory makers to generate a shortlist of countries, for which efforts should be made to clarify and improve the quality of non-energy use data in national and international energy statistics.

M. Weiss; M.L. Neelis; M.C. Zuidberg; M.K. Patel

2008-01-01T23:59:59.000Z

305

Summary of Preliminary Criticality Analysis for Peach Bottom Fuel in the DOE Standardized Spent Nuclear Fuel Canister  

SciTech Connect (OSTI)

The Department of Energy's (DOE's) National Spent Nuclear Fuel Program is developing a standardized set of canisters for DOE spent nuclear fuel (SNF). These canisters will be used for DOE SNF handling, interim storage, transportation, and disposal in the national repository. Several fuels are being examined in conjunction with the DOE SNF canisters. This report summarizes the preliminary criticality safety analysis that addresses general fissile loading limits for Peach Bottom graphite fuel in the DOE SNF canister. The canister is considered both alone and inside the 5-HLW/DOE Long Spent Fuel Co-disposal Waste Package, and in intact and degraded conditions. Results are appropriate for a single DOE SNF canister. Specific facilities, equipment, canister internal structures, and scenarios for handling, storage, and transportation have not yet been defined and are not evaluated in this analysis. The analysis assumes that the DOE SNF canister is designed so that it maintains reasonable geometric integrity. Parameters important to the results are the canister outer diameter, inner diameter, and wall thickness. These parameters are assumed to have nominal dimensions of 45.7-cm (18.0-in.), 43.815-cm (17.25-in), and 0.953-cm (0.375-in.), respectively. Based on the analysis results, the recommended fissile loading for the DOE SNF canister is 13 Peach Bottom fuel elements if no internal steel is present, and 15 Peach Bottom fuel elements if credit is taken for internal steel.

Henrikson, D.J.

1999-09-01T23:59:59.000Z

306

Bubble-Point Measurements of Eight Binary Mixtures for Organic Rankine Cycle Applications  

Science Journals Connector (OSTI)

Bubble-Point Measurements of Eight Binary Mixtures for Organic Rankine Cycle Applications ... These mixtures are of interest as working fluids in organic Rankine power cycles. ...

Stephanie L. Outcalt; Eric W. Lemmon

2013-05-24T23:59:59.000Z

307

GridRun: A lightweight packaging and execution environment forcompact, multi-architecture binaries  

SciTech Connect (OSTI)

GridRun offers a very simple set of tools for creating and executing multi-platform binary executables. These ''fat-binaries'' archive native machine code into compact packages that are typically a fraction the size of the original binary images they store, enabling efficient staging of executables for heterogeneous parallel jobs. GridRun interoperates with existing distributed job launchers/managers like Condor and the Globus GRAM to greatly simplify the logic required launching native binary applications in distributed heterogeneous environments.

Shalf, John; Goodale, Tom

2004-02-01T23:59:59.000Z

308

Star Cluster Ecology: VII The evolution of young dense star clusters containing primordial binaries  

E-Print Network [OSTI]

We study the first 100Myr of the evolution of isolated star clusters initially containing 144179 stars, including 13107 (10%) primordial hard binaries. Our calculations include the effects of both stellar and binary evolution. Gravitational interactions among the stars are computed by direct N-body integration using high precision GRAPE-6 hardware. The evolution of the core radii and central concentrations of our simulated clusters are compared with the observed sample of young (about 100Myr) star clusters in the large Magellanic cloud. Even though our simulations start with a rich population of primordial binaries, core collapse during the early phase of the cluster evolution is not prevented. Throughout the simulations, the fraction of binaries remains roughly constant (about 10%). Due to the effects of mass segregation the mass function of intermediate-mass main-sequence stars becomes as flat as $\\alpha=-1.8$ in the central part of the cluster (where the initial Salpeter mass function had $\\alpha=-2.35$). About 6--12% of the neutron stars were retained in our simulations; the fraction of retained black holes is 40--70%. In each simulation about three neutron stars become members of close binaries with a main-sequence companion. Such a binary will eventually become an x-ray binary, when the main-sequence star starts to fill its Roche lobe. Black holes are found more frequently in binaries; in each simulated cluster we find about 11 potential x-ray binaries containing a black hole. Abstract abbreviated....

Simon Portegies Zwart; Steve McMillan; Jun Makino

2006-09-27T23:59:59.000Z

309

Robust Audio Watermarking Algorithm Based on Audio Binary Halftone Pre-process  

Science Journals Connector (OSTI)

Conventional audio watermarking method has the following deficiencies: the ... simple which reduce the security; the embedded audio watermarking is meaningless binary sequence. To address these problems, we propo...

Huan Li; Zheng Qin; XuanPing Zhang; Xu Wang

2011-01-01T23:59:59.000Z

310

Compact binary evolutions with the Z4c formulation  

Science Journals Connector (OSTI)

Numerical relativity simulations of compact binaries with the Z4c and Baumgarte-Shapiro-Shibata-Nakamura-Oohara-Kojima (BSSNOK) formulations are compared. The Z4c formulation is advantageous in every case considered. In simulations of nonvacuum spacetimes, the constraint violations due to truncation errors are between 1 and 3 orders of magnitude lower in the Z4c evolutions. Improvements are also found in the accuracy of the computed gravitational radiation. For equal-mass irrotational binary neutron star evolutions, we find that the absolute errors in phase and amplitude of the waveforms can be up to a factor of 4 smaller. The quality of the Z4c numerical data is also demonstrated by a remarkably accurate computation of the Arnowitt-Deser-Misner mass from surface integrals. For equal-mass nonspinning binary puncture black hole evolutions, we find that the absolute errors in phase and amplitude of the waveforms can be up to a factor of 2 smaller. In the same evolutions, we find that away from the punctures the Hamiltonian constraint violation is reduced by between 1 and 2 orders of magnitude. Furthermore, the utility of gravitational radiation controlling, constraint preserving boundary conditions for the Z4c formulation is demonstrated. The evolution of spacetimes containing a single compact object confirms earlier results in spherical symmetry. The boundary conditions avoid spurious and nonconvergent effects present in high resolution runs with either formulation with a more naive boundary treatment. We conclude that Z4c is preferable to BSSNOK for the numerical solution of the 3+1 Einstein equations with the puncture gauge.

David Hilditch; Sebastiano Bernuzzi; Marcus Thierfelder; Zhoujian Cao; Wolfgang Tichy; Bernd Brgmann

2013-10-30T23:59:59.000Z

311

THE AGE AND STELLAR PARAMETERS OF THE PROCYON BINARY SYSTEM  

SciTech Connect (OSTI)

The Procyon AB binary system (orbital period 40.838 yr, a newly refined determination) is near and bright enough that the component radii, effective temperatures, and luminosities are very well determined, although more than one possible solution to the masses has limited the claimed accuracy. Preliminary mass determinations for each component are available from Hubble Space Telescope imaging, supported by ground-based astrometry and an excellent Hipparcos parallax; we use these for our preferred solution for the binary system. Other values for the masses are also considered. We have employed the TYCHO stellar evolution code to match the radius and luminosity of the F5 IV-V primary star to determine the system's most likely age as 1.87 {+-} 0.13 Gyr. Since prior studies of Procyon A found its abundance indistinguishable from solar, the solar composition of Asplund, Grevesse, and Sauval (Z = 0.014) is assumed for the Hertzsprung-Russell diagram fitting. An unsuccessful attempt to fit using the older solar abundance scale of Grevesse and Sauval (Z = 0.019) is also reported. For Procyon B, 11 new sequences for the cooling of non-DA white dwarfs have been calculated to investigate the dependences of the cooling age on (1) the mass, (2) core composition, (3) helium layer mass, and (4) heavy-element opacities in the helium envelope. Our calculations indicate a cooling age of 1.19 {+-} 0.11 Gyr, which implies that the progenitor mass of Procyon B was 2.59{sub -0.26}{sup +0.44} M{sub Sun }. In a plot of initial versus final mass of white dwarfs in astrometric binaries or star clusters (all with age determinations), the Procyon B final mass lies several {sigma} below a straight line fit.

Liebert, James; Arnett, David [Department of Astronomy and Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Fontaine, Gilles [Departement de Physique, Universite de Montreal, C.P. 6128, Succ. Centre-Ville, Montreal, Quebec H3C 3J7 (Canada); Young, Patrick A. [School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 (United States); Williams, Kurtis A., E-mail: jamesliebert@gmail.com, E-mail: darnett@as.arizona.edu, E-mail: fontaine@astro.umontreal.ca, E-mail: pyoung.3@asu.edu, E-mail: Kurtis.Williams@tamuc.edu [Texas A and M University, Commerce, TX 75429 (United States)

2013-05-20T23:59:59.000Z

312

Investigating Binary Black Hole Mergers with Principal Component Analysis  

E-Print Network [OSTI]

Despite recent progress in numerical simulations of the coalescence of binary black hole systems, highly asymmetric spinning systems and the construction of accurate physical templates remain challenging and computationally expensive. We explore the feasibility of a prompt and robust test of whether the signals exhibit evidence for generic features that can educate new simulations. We form catalogs of numerical relativity waveforms with distinct physical effects and compute the relative probability that a gravitational wave signal belongs to each catalog. We introduce an algorithm designed to perform this task for coalescence signals using principal component analysis of waveform catalogs and Bayesian model selection and demonstrate its effectiveness.

James Clark; Laura Cadonati; James Healy; Ik Siong Heng; Josh Logue; Nicholas Mangini; Lionel London; Larne Pekowsky; Deirdre Shoemaker

2014-06-20T23:59:59.000Z

313

The Spectroscopic Orbits of Five Solar Type, Single Lined Binaries  

E-Print Network [OSTI]

We have determined spectroscopic orbits for five single-lined spectroscopic binaries, HD 100167, HD 135991, HD 140667, HD 158222, HD 217924. Their periods range from 60.6 to 2403 days and the eccentricities, from 0.20 to 0.84. Our spectral classes for the stars confirm that they are of solar type, F9 to G5, and all are dwarfs. Their [Fe/H] abundances, determined spectroscopically, are close to the solar value and on average are 0.12 greater than abundances from a photometric calibration. Four of the five stars are rotating faster than their predicted pseudosynchronous rotational velocities.

Fekel, Francis C; Muterspaugh, Matthew W; Williamson, Michael H

2014-01-01T23:59:59.000Z

314

Plastic flow in polycrystal states in a binary mixture  

E-Print Network [OSTI]

Using molecular dynamics simulation we examine dynamics in sheared polycrystal states in a binary mixture containing 10% larger particles in two dimensions. We find large stress fluctuations arising from sliding motions of the particles at the grain boundaries, which occur cooperatively to release the elastic energy stored. These dynamic processes are visualized with the aid of a sixfold angle $\\alpha_j(t)$ representing the local crystal orientation and a disorder variable $D_j(t)$ representing a deviation from the hexagonal order for particle $j$.

Toshiyuki Hamanaka; Akira Onuki

2007-09-05T23:59:59.000Z

315

Binary and multifragment decay of very hot nuclei  

SciTech Connect (OSTI)

Compound binary emission of complex fragments is illustrated for a variety of reactions. Complex fragment emission from 35 and 40 MeV/N {sup 139}La + {sup 12}C, {sup 27}Al, {sup 40}Ca and {sup 51}V reactions has been studied. Multifragment events from these reactions were assigned to sources characterized by their energy and mass through the incomplete-fusion-model kinematics. Excitation functions for the various multifragment channels appear to be nearly independent of the system and bombarding energy. Preliminary comparisons of the data with sequential-statistical-decay calculations are discussed. 14 refs., 7 figs.

Moretto, L.G.; Blumenfeld, Y.; Charity, R.J.; Wozniak, G.J.

1990-05-01T23:59:59.000Z

316

IUPAC-NIST Solubility Data Series. 78. Acetonitrile Binary Systems  

Science Journals Connector (OSTI)

The mutual solubilities and liquidliquid equilibria of acetonitrile binary systems with different compounds exhaustively and critically are reviewed. The compounds include water inorganic compounds and a variety of organic compounds (hydrocarbons halogenated hydrocarbons alcohols carboxylic acids and esters nitrogen and sulfur compounds). A total of 353 systems reported in the primary literature through 2000 are compiled. For 25 systems sufficient data are available to allow critical evaluation. All data are expressed as mass and mole fractions as well as the originally reported units. Similar reviews of gas liquid and solid solubilities for other systems are published in the of Solubility Data Series. This is the 78th volume of this series.

Valerii P. Sazonov; David G. Shaw; Valerii P. Sazonov; Nikolai V. Sazonov; Adam Skrzecz; Valerii P. Sazonov; Nikolai V. Sazonov; Nikolai I. Lisov

2002-01-01T23:59:59.000Z

317

Radial velocities of population II binary stars. II  

E-Print Network [OSTI]

Here we publish the second list of radial velocities for 91 Hipparcos stars, mostly high transverse velocity binaries without previous radial velocity measurements. The measurements of radial velocities are done with a CORAVEL-type radial velocity spectrometer with an accuracy better than 1 km/s. We also present the information on eight new radial velocity variables - HD 29696, HD 117466AB, BD +28 4035AB, BD +30 2129A, BD +39 1828AB, BD +69 230A, BD +82 565A and TYC 2267-1300-1 - found from our measurements. Two stars (HD 27961AB and HD 75632AB) are suspected as possible radial velocity variables.

A. Bartkevicius; J. Sperauskas

2006-01-10T23:59:59.000Z

318

Adaptive filters for detection of gravitational waves from coalescing binaries  

SciTech Connect (OSTI)

In this work we propose use of infinite impulse response adaptive line enhancer (IIR ALE) filters for detection of gravitational waves from coalescing binaries. We extend our previous work and define an adaptive matched filter structure. Filter performance is analyzed in terms of the tracking capability and determination of filter parameters. Furthermore, following the Neyman-Pearson strategy, receiver operating characteristics are derived, with closedform expressions for detection threshold, false alarm, and detection probability. Extensive tests demonstrate the effectiveness of adaptive filters both in terms of small computational cost and robustness.

Eleuteri, Antonio; Milano, Leopoldo; De Rosa, Rosario; Garufi, Fabio; Acernese, Fausto; Barone, Fabrizio; Giordano, Lara; Pardi, Silvio [Dip. di Scienze Fisiche, Universita di Napoli 'Federico II', via Cintia, I-80126 Naples (Italy) and INFN sez. Napoli, via Cintia, I-80126 Naples (Italy); Dip. di Scienze Farmaceutiche, Universita di Salerno, via Ponte Don Melillo, 84084 Fisciano (Saudi Arabia) (IT) and INFN sez. Napoli, via Cintia, I-80126 Naples (Italy); Dip. di Matematica ed Applicazioni, Universita di Napoli 'Federico II', via Cintia, I-80126 Naples (Italy) and INFN sez. Napoli, via Cintia, I-80126 Naples (Italy)

2006-06-15T23:59:59.000Z

319

Lack of energy equipartition in homogeneous heated binary granular mixtures  

E-Print Network [OSTI]

We consider the problem of determining the granular temperatures of the components of a homogeneous binary heated mixture of inelastic hard spheres, in the framework of Enskog kinetic theory. Equations are derived for the temperatures of each species and their ratio, which is different from unity, as may be expected since the system is out of equilibrium. We focus on the particular heating mechanism where the inelastic energy loss is compensated by an injection through a random external force (``stochastic thermostat''). The influence of various parameters and their possible experimental relevance is discussed.

A. Barrat; E. Trizac

2002-05-21T23:59:59.000Z

320

Compact Stars in low-mass X-ray binaries  

E-Print Network [OSTI]

We propose a model for compact stars in low-mass X-ray binaries(LMXBs) namely KS 1731-260, EXO 1745-248 and 4U 1608-52. Here we investigate the physical phenomena of a compact star in the LMXBs. Using our model, we have calculated central density, surface density, mass(M) and red-shift for the above mentioned compact stars, which is very much consistent with the reported data. We also obtain the possible equation of state(EOS) of the stars which is physically acceptable.

Sk. Monowar Hossein; Sajahan Molla; Md. Abdul Kayum Jafry; Mehedi Kalam

2014-08-13T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Ultrasonic studies in binary solutions of pyridine with water, methanol, and ethanol  

Science Journals Connector (OSTI)

The velocity and absorption of ultrasound at 19.5 MHz were studied as a function of the concentration in binary solutions of pyridine with water methanol and ethanol. In addition the compressibility and volume viscosity were calculated. Molecular processes are suggested to explain the variation of the ultrasonic properties of these binary solutions with respect to concentration.

K. N. Thomas; F. B. Stumpf

1973-01-01T23:59:59.000Z

322

Lattice Boltzmann model for binary mixtures Li-Shi Luo1,  

E-Print Network [OSTI]

Lattice Boltzmann model for binary mixtures Li-Shi Luo1, * and Sharath S. Girimaji2, 1 ICASE, Mail 2002 An a priori derivation of the lattice Boltzmann equations for binary mixtures is provided The lattice Boltzmann equation LBE 1­6 is emerging as an effective computational method based on fundamental

Luo, Li-Shi

323

Hypersonic acoustic excitations in binary colloidal crystals: Big versus small hard sphere control  

E-Print Network [OSTI]

Hypersonic acoustic excitations in binary colloidal crystals: Big versus small hard sphere control January 2007 The phononic band structure of two binary colloidal crystals, at hypersonic frequencies of light photonic crystals 2 and sound at hypersonic frequencies.3 The propa- gation of phonons

Schofield, Andrew B.

324

Binary and nonbinary description of hypointensity for search and retrieval of brain MR images  

E-Print Network [OSTI]

Binary and nonbinary description of hypointensity for search and retrieval of brain MR images. In a previous study based on binary description of hypointensity in the brain, it was shown that brain iron accumulation shape provides additional information to the shape-insensitive features, such as the total brain

Yanikoglu, Berrin

325

Binary Join Trees for Computing Marginals in the Shenoy-Shafer Architecture  

E-Print Network [OSTI]

The main goal of this paper is to describe a data structure called binary join trees that are useful in computing multiple marginals efficiently in the Shenoy-Shafer architecture. We define binary join trees, describe their utility, and describe a...

Shenoy, Prakash P.

1997-08-01T23:59:59.000Z

326

HOT WHITE DWARFS IN DETACHED BINARIES FROM THE ROSAT WFC ALL SKY SURVEY  

E-Print Network [OSTI]

HOT WHITE DWARFS IN DETACHED BINARIES FROM THE ROSAT WFC ALL SKY SURVEY Thesis submitted 1997 #12; HOT WHITE DWARFS IN DETACHED BINARIES FROM THE ROSAT WFC ALL SKY SURVEY Matthew R. Burleigh ABSTRACT White dwarfs in unresolved pairs with normal stars (spectral type K or earlier) are invisible

Burleigh, Matt

327

The effect of cluster formation on mass separation in binary molecular beams  

E-Print Network [OSTI]

The effect of cluster formation on mass separation in binary molecular beams Wei Li,a) M. J composition of a skimmed supersonic binary molecular beam originally consisting of a 20% neon/80% xenon. © 2000 American Institute of Physics. S0021-9606 00 01806-7 I. INTRODUCTION Supersonic molecular beam

Sibener, Steven

328

Division Unit for Binary Integer Decimals Tomas Lang and Alberto Nannarelli  

E-Print Network [OSTI]

) for significands. Recent decimal division designs are all based on the Binary Coded Decimal (BCD) encoding. We. The conversion from declet to Binary Coded Decimal (BCD) format, and vice versa, can be implemented with simple in standard cell technology. The implementation of the proposed BID division unit is compared to that of a BCD

Nannarelli, Alberto

329

Bubble and droplet motion in binary mixtures: Evaporation-condensation mechanism and Marangoni effect  

E-Print Network [OSTI]

Bubble and droplet motion in binary mixtures: Evaporation-condensation mechanism and Marangoni 2009; published 14 April 2009 Bubble and droplet motion in binary mixtures is studied in weak heat a crossover concentration c inversely proportional to the radius R of the bubble or droplet. Here c is usually

330

X-ray Pulsations in the Supersoft X-ray Binary CAL 83  

E-Print Network [OSTI]

X-ray data reveal that the supersoft X-ray binary CAL 83 exhibits 38.4 minute pulsations at some epochs. These X-ray variations are similar to those found in some novae and are likely to be caused by nonradial pulsations the white dwarf. This is the first detection of pulsations in a classical supersoft X-ray binary.

P. C. Schmidtke; A. P. Cowley

2005-09-28T23:59:59.000Z

331

Hypercritical Accretion, Induced Gravitational Collapse, and Binary-Driven Hypernovae  

E-Print Network [OSTI]

The induced gravitational collapse (IGC) paradigm has been successfully applied to the explanation of the concomitance of gamma-ray bursts (GRBs) with supernovae (SNe) Ic. The progenitor is a tight binary system composed by a carbon-oxygen (CO) core and a neutron star (NS) companion. The explosion of the SN leads to hypercritical accretion onto the NS companion which reaches the critical mass, hence inducing its gravitational collapse to a black hole (BH) with consequent emission of the GRB. The first estimates of this process were based on a simplified model of the binary parameters and the Bondi-Hoyle-Lyttleton accretion rate. We present here the first full numerical simulations of the IGC phenomenon. We simulate the core-collapse and SN explosion of CO stars to obtain the density and ejection velocity of the SN ejecta. We follow the hydrodynamic evolution of the accreting material falling into the Bondi-Hoyle surface of the NS all the way up to its incorporation to the NS surface. The simulations go up to ...

Fryer, Chris L; Ruffini, Remo

2014-01-01T23:59:59.000Z

332

FORMATION OF STABLE MAGNETARS FROM BINARY NEUTRON STAR MERGERS  

SciTech Connect (OSTI)

By performing fully general relativistic magnetohydrodynamic simulations of binary neutron star mergers, we investigate the possibility that the end result of the merger is a stable magnetar. In particular, we show that, for a binary composed of two equal-mass neutron stars (NSs) of gravitational mass M {approx} 1.2 M{sub Sun} and equation of state similar to Shen et al. at high densities, the merger product is a stable NS. Such NS is found to be differentially rotating and ultraspinning with spin parameter J/M{sup 2} {approx} 0.86, where J is its total angular momentum, and it is surrounded by a disk of Almost-Equal-To 0.1 M{sub Sun }. While in our global simulations the magnetic field is amplified by about two orders of magnitude, local simulations have shown that hydrodynamic instabilities and the onset of the magnetorotational instability could further increase the magnetic field strength up to magnetar levels. This leads to the interesting possibility that, for some NS mergers, a stable and magnetized NS surrounded by an accretion disk could be formed. We discuss the impact of these new results for the emission of electromagnetic counterparts of gravitational wave signals and for the central engine of short gamma-ray bursts.

Giacomazzo, Bruno [JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309 (United States); Perna, Rosalba [JILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309 (United States)

2013-07-10T23:59:59.000Z

333

Characterizing spinning black hole binaries in eccentric orbits with LISA  

SciTech Connect (OSTI)

The Laser Interferometer Space Antenna (LISA) is designed to detect gravitational wave signals from astrophysical sources, including those from coalescing binary systems of compact objects such as black holes. Colliding galaxies have central black holes that sink to the center of the merged galaxy and begin to orbit one another and emit gravitational waves. Some galaxy evolution models predict that the binary black hole system will enter the LISA band with significant orbital eccentricity, while other models suggest that the orbits will already have circularized. Using a full 17 parameter waveform model that includes the effects of orbital eccentricity, spin precession, and higher harmonics, we investigate how well the source parameters can be inferred from simulated LISA data. Defining the reference eccentricity as the value one year before merger, we find that for typical LISA sources, it will be possible to measure the eccentricity to an accuracy of parts in a thousand. The accuracy with which the eccentricity can be measured depends only very weakly on the eccentricity, making it possible to distinguish circular orbits from those with very small eccentricities. LISA measurements of the orbital eccentricity can help constraints theories of galaxy mergers in the early universe. Failing to account for the eccentricity in the waveform modeling can lead to a loss of signal power and bias the estimation of parameters such as the black hole masses and spins.

Key, Joey Shapiro; Cornish, Neil J. [Department of Physics, Montana State University, Bozeman, Montana 59717 (United States)

2011-04-15T23:59:59.000Z

334

Improved Moving Puncture Gauge Conditions for Compact Binary Evolutions  

E-Print Network [OSTI]

Robust gauge conditions are critically important to the stability and accuracy of numerical relativity (NR) simulations involving compact objects. Most of the NR community use the highly robust---though decade-old---moving-puncture (MP) gauge conditions for such simulations. It has been argued that in binary black hole (BBH) evolutions adopting this gauge, noise generated near adaptive-mesh-refinement (AMR) boundaries does not converge away cleanly with increasing resolution, severely limiting gravitational waveform accuracy at computationally feasible resolutions. We link this noise to a sharp (short-wavelength), initial outgoing gauge wave crossing into progressively lower resolution AMR grids, and present improvements to the standard MP gauge conditions that focus on stretching, smoothing, and more rapidly settling this outgoing wave. Our best gauge choice greatly reduces gravitational waveform noise during inspiral, yielding less fluctuation in convergence order and $\\sim 40%$ lower waveform phase and amplitude errors at typical resolutions. Noise in other physical quantities of interest is also reduced, and constraint violations drop by more than an order of magnitude. We expect these improvements will carry over to simulations of all types of compact binary systems, as well as other $N$+1 formulations of gravity for which MP-like gauge conditions can be chosen.

Zachariah B. Etienne; John G. Baker; Vasileios Paschalidis; Bernard J. Kelly; Stuart L. Shapiro

2014-10-06T23:59:59.000Z

335

The Age and Stellar Parameters of the Procyon Binary System  

E-Print Network [OSTI]

The Procyon AB binary system (orbital period 40.838 years, a newly-refined determination), is near and bright enough that the component radii, effective temperatures, and luminosities are very well determined, although more than one possible solution to the masses has limited the claimed accuracy. Preliminary mass determinations for each component are available from HST imaging, supported by ground-based astrometry and an excellent Hipparcos parallax; we use these for our preferred solution for the binary system. Other values for the masses are also considered. We have employed the TYCHO stellar evolution code to match the radius and luminosity of the F5 IV-V primary star to determine the system's most likely age as 1.87 +/- 0.13 Gyr. Since prior studies of Procyon A found its abundance indistinguishable from solar, the solar composition of Asplund, Grevesse & Sauval (Z=0.014) is assumed for the HR Diagram flitting. An unsuccessful attempt to fit using the older solar abundance scale of Grevesse & Sau...

Liebert, James; Young, Patrick A; Williams, Kurtis A; Arnett, David

2013-01-01T23:59:59.000Z

336

Long term evolution of an interacting binary system  

E-Print Network [OSTI]

We describe a new code to simulate the stellar evolution of a close interacting binary system. It is then used to calculate the evolution of a classical nova system composed of a 1.25 Msun Main-Sequence (MS) star and a 1.0 Msun white dwarf (WD) companion. The system begins as a well separated non-interacting binary system. Initially, the two stars evolve independently of each other. However, Roche lobe overflow begins as the MS star expands on its way to become a Red Giant. We follow the mass accreted onto the WD and the ensuing nuclear runaways for several thousand flashes. The main finding is that the Roche-Lobe mass transfer rate is modulated by oscillations in the MS star, with a period that is somewhat shorter than the thermal time scale of the star. This periodically modulates the rate of thermonuclear flashes on the WD, between once every 12000 yrs, such that the WD can cool, to once every 300 yrs, such that it cannot. The system is further complicated by the secular drift in the secondary modulation. ...

Shaviv, Giora; Shaviv, Nir J

2014-01-01T23:59:59.000Z

337

Theoretical X-ray Line Profiles from Colliding Wind Binaries  

E-Print Network [OSTI]

We present theoretical X-ray line profiles from a range of model colliding wind systems. In particular, we investigate the effects of varying the stellar mass-loss rates, the wind speeds, and the viewing orientation. We find that a wide range of theoretical line profile shapes is possible, varying with orbital inclination and phase. At or near conjunction, the lines have approximately Gaussian profiles, with small widths (HWHM ~ 0.1 v_\\infty) and definite blue- or redshifts (depending on whether the star with the weaker wind is in front or behind). When the system is viewed at quadrature, the lines are generally much broader (HWHM ~ v_\\infty), flat-topped and unshifted. Local absorption can have a major effect on the observed profiles - in systems with mass-loss rates of a few times 10^{-6} Msol/yr the lower energy lines (E wind of the primary. The orbital variation of the line widths and shifts is reduced in a low inclination binary. The extreme case is a binary with i = 0 degrees, for which we would expect no line profile variation.

D. B. Henley; I. R. Stevens; J. M. Pittard

2003-06-23T23:59:59.000Z

338

Ultrashort-period MS eclipsing systems. New observations and light curve solutions of six NSVS binaries  

E-Print Network [OSTI]

We carried out photometric and low-resolution spectral observations of six eclipsing ultrashort-period binaries with MS components. The light curve solutions of the Rozhen observations show that all targets are overcontact systems. We found well-defined empirical relation "period -- semi-major axis" for the short-period binaries and used it for estimation of the global parameters of the targets. Our results revealed that NSVS 925605 is quite interesting target: (a) it is one of a few contact binaries with M components; (b) it exhibits high activity (emission in H$\\alpha$ line, X-ray emission, large cool spots, non-Planck energy distribution); (c) its components differ in temperature by 700 K. All appearances of high magnetic activity and huge fillout factor (0.7) of NSVS 925605 might be assumed as a precursor of the predicted merging of close magnetic binaries. Another unusual binary is NSVS 2700153 which reveals considerable long-term variability.

Dimitrov, Dinko

2015-01-01T23:59:59.000Z

339

Robust parameter estimation for compact binaries with ground-based gravitational-wave observations using LALInference  

E-Print Network [OSTI]

The Advanced LIGO and Advanced Virgo gravitational wave (GW) detectors will begin operation in the coming years, with compact binary coalescence events a likely source for the first detections. The gravitational waveforms emitted directly encode information about the sources, including the masses and spins of the compact objects. Recovering the physical parameters of the sources from the GW observations is a key analysis task. This work describes the LALInference software library for Bayesian parameter estimation of compact binary coalescence (CBC) signals, which builds on several previous methods to provide a well-tested toolkit which has already been used for several studies. We are able to show using three independent sampling algorithms that our implementation consistently converges on the same results, giving confidence in the parameter estimates thus obtained. We demonstrate this with a detailed comparison on three compact binary systems: a binary neutron star, a neutron star-black hole binary and a bin...

Veitch, John; Farr, Benjamin; Farr, Will M; Graff, Philip; Vitale, Salvatore; Aylott, Ben; Blackburn, Kent; Christensen, Nelson; Coughlin, Michael; Del Pozzo, Walter; Feroz, Farhan; Gair, Jonathan; Haster, Carl-Johan; Kalogera, Vicky; Littenberg, Tyson; Mandel, Ilya; O'Shaughnessy, Richard; Pitkin, Matthew; Rodriguez, Carl; Rver, Christian; Sidery, Trevor; Smith, Rory; Van Der Sluys, Marc; Vecchio, Alberto; Vousden, Will; Wade, Leslie

2014-01-01T23:59:59.000Z

340

Short Gamma Ray Bursts as possible electromagnetic counterpart of coalescing binary systems  

E-Print Network [OSTI]

Coalescing binary systems, consisting of two collapsed objects, are among the most promising sources of high frequency gravitational waves signals detectable, in principle, by ground-based interferometers. Binary systems of Neutron Star or Black Hole/Neutron Star mergers should also give rise to short Gamma Ray Bursts, a subclass of Gamma Ray Bursts. Short-hard-Gamma Ray Bursts might thus provide a powerful way to infer the merger rate of two-collapsed object binaries. Under the hypothesis that most short Gamma Ray Bursts originate from binaries of Neutron Star or Black Hole/Neutron Star mergers, we outline here the possibility to associate short Gamma Ray Bursts as electromagnetic counterpart of coalescing binary systems.

S. Capozziello; M. De Laurentis; I. De Martino; M. Formisano

2010-04-27T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Linking the fate of massive black hole binaries to the active galactic nuclei luminosity function  

E-Print Network [OSTI]

Massive black hole binaries are naturally predicted in the context of the hierarchical model of structure formation. The binaries that manage to lose most of their angular momentum can coalesce to form a single remnant. In the last stages of this process, the holes undergo an extremely loud phase of gravitational wave emission, possibly detectable by current and future probes. The theoretical effort towards obtaining a coherent physical picture of the binary path down to coalescence is still underway. In this paper, for the first time, we take advantage of observational studies of active galactic nuclei evolution to constrain the efficiency of gas-driven binary decay. Under conservative assumptions we find that gas accretion toward the nuclear black holes can efficiently lead binaries of any mass forming at high redshift (> 2) to coalescence within the current time. The observed "downsizing" trend of the accreting black hole luminosity function further implies that the gas inflow is sufficient to drive light ...

Dotti, Massimo; Montuori, Carmen

2015-01-01T23:59:59.000Z

342

Deep-water bottom-current reworked sands: Their recognition and reservoir potential, northern Gulf of Mexico  

SciTech Connect (OSTI)

Some Pliocene and Pleistocene reservoir sands in intraslope basins of the northern Gulf of Mexico exhibit features that are interpreted to be indicative of reworking by deep-water (bathyal) bottom currents (contour currents). These fine sands have previously been interpreted as turbidites associated with levee overbanks and lobes of submarine fan complexes; however, sedimentological features characteristic of turbidites are rare in these laminated sands. Common features observed are (1) numerous (up to 75 layers/m) thin (<2 cm) sand layers, (2) sharp upper contacts, (3) inverse grading, (4) current ripples, (5) lenticular bedding, (6) flaser bedding, (7) bidirectional cross-lamination, and (8) sigmoidal bed forms with mud drapes (i.e., mud offshoots). These features, dominated by traction structures, can be explained by reworking of overbank turbidite sands by deep-bottom currents. In the present Gulf of Mexico, the surface Loop Current is considered to be a major cause of deep circulation. The authors propose that similar bottom currents and perhaps minor deep tidal currents existed during Pliocene and Pleistocene times. The entire sediment package may be thick and continuous, but individual sand layers within the package are thin and discontinuous. Porosity values of these sands range from 27 to 40%, and permeability ranges from 100 to 2,000 md at 200 psi. In seismic profiles or seismic facies maps, it is difficult to distinguish the reworked sands from turbidites. Therefore, geologic models based on core and process sedimentology are the key to a better understanding of these often misinterpreted complex reservoir facies.

Shanmugam, G. (Mobil Research and Development Corp., Dallas, TX (USA)); Spalding, T.D.; Kolb, R.A.; Lockrem, T.M. (Mobil Exploration and Producing Inc., New Orleans, LA (USA))

1990-05-01T23:59:59.000Z

343

Vacancies in ordered and disordered binary alloys treated with the cluster expansion A. Van der Ven and G. Ceder  

E-Print Network [OSTI]

Vacancies in ordered and disordered binary alloys treated with the cluster expansion A. Van der Ven far neglected the presence of vacancies. Here, we invoke a local cluster expansion as a perturbation to the standard binary cluster expansion to model the equilibrium vacancy concentration in a binary alloy

Ceder, Gerbrand

344

Low velocity ion stopping in binary ionic mixtures  

SciTech Connect (OSTI)

Attention is focused on the low ion velocity stopping mechanisms in multicomponent and dense target plasmas built of quasiclassical electron fluids neutralizing binary ionic mixtures, such as, deuterium-tritium of current fusion interest, proton-heliumlike iron in the solar interior or proton-helium ions considered in planetology, as well as other mixtures of fiducial concern in the heavy ion beam production of warm dense matter at Bragg peak conditions. The target plasma is taken in a multicomponent dielectric formulation a la Fried-Conte. The occurrence of projectile ion velocities (so-called critical) for which target electron slowing down equals that of given target ion components is also considered. The corresponding multiquadrature computations, albeit rather heavy, can be monitored analytical through a very compact code operating a PC cluster. Slowing down results are systematically scanned with respect to target temperature and electron density, as well as ion composition.

Tashev, Bekbolat; Baimbetov, Fazylkhan [Department of Physics, Kazakh National University, Tole Bi 96, Almaty 480012 (Kazakhstan); Deutsch, Claude [LPGP (UMR-CNRS 8578), Universite Paris XI, 91405 Orsay (France); Fromy, Patrice [Direction de l'Informatique, Universite Paris XI, 91405 Orsay (France)

2008-10-15T23:59:59.000Z

345

A brown dwarf mass donor in an accreting binary  

E-Print Network [OSTI]

A long standing and unverified prediction of binary star evolution theory is the existence of a population of white dwarfs accreting from sub-stellar donor stars. Such systems ought to be common, but the difficulty of finding them, combined with the challenge of detecting the donor against the light from accretion means that no donor star to date has a measured mass below the hydrogen burning limit. Here we apply a technique which allows us to reliably measure the mass of the unseen donor star in eclipsing systems. We are able to identify a brown dwarf donor star, with a mass of 0.052+/-0.002 Msun. The relatively high mass of the donor star for its orbital period suggests that current evolutionary models may underestimate the radii of brown dwarfs.

S. P. Littlefair; V. S. Dhillon; T. R. Marsh; Boris T. Gaensicke; John Southworth; C. A. Watson

2006-12-08T23:59:59.000Z

346

Heating mechanism affects equipartition in a binary granular system  

E-Print Network [OSTI]

Two species of particles in a binary granular system typically do not have the same mean kinetic energy, in contrast to the equipartition of energy required in equilibrium. We investigate the role of the heating mechanism in determining the extent of this non-equipartition of kinetic energy. In most experiments, different species of particle are unequally heated at the boundaries. We show by event-driven simulations that this differential heating at the boundary influences the level of non-equipartition even in the bulk of the system. This conclusion is fortified by studying a numerical model and a solvable stochastic model without spatial degrees of freedom. In both cases, even in the limit where heating events are rare compared to collisions, the effect of the heating mechanism persists.

Hong-Qiang Wang; Narayanan Menon

2007-10-19T23:59:59.000Z

347

Very hot nuclear systems and their binary and multifragment decay  

SciTech Connect (OSTI)

Compound emission of complex fragments in the reaction {sup 63}Cu + {sup 12}C is used to determine the associated ridge-line potential. Compound binary emission of complex fragments at higher energies is illustrated for a variety of reactions. Complex fragment emission from 18, 26, 31, 35, 45 and 55 MeV/N {sup 139}La/{sup 129}Xe + {sup 12}C, {sup 27}Al, {sup 40}Ca, {sup 51}V, {sup nat}Cu and {sup 139}La reactions has been studied. Multifragment events from these reactions were assigned to sources characterized by their energy and mass through the incomplete-fusion-model kinematics. Excitation functions for the various multifragment channels appear to be nearly independent of the system and bombarding energy. Preliminary comparisons of the data with sequential-statistical-decay calculations are discussed. 16 refs., 9 figs.

Moretto, L.G.; Blumenfeld, Y.; Delis, D.; Wozniak, G.J.

1990-10-01T23:59:59.000Z

348

Free energy of surface segregation in binary alloys  

Science Journals Connector (OSTI)

The pair-bond approximation and the mean-field approach are used to derive an expression for the free energy of surface segregation in binary alloys. It is suggested that a correction term, in addition to the surface energy term and the heat of solution, should be included in the free energy of segregation in order to obtain a better quantitative agreement between theory and experiment. This correction term is a concentration-dependent quantity and therefore cannot be obtained from pure-metal properties. The theory is applied to Cu-Ni alloy, and if the correction term is properly chosen, then a good quantitative agreement with experiment is found for all in-depth surface compositions. The free energy of segregation obtained by this method is in qualitative agreement with that calculated on surface core-level shifts. This is not the case if the correction term is not considered.

Yi-Chen Cheng; C. J. Wu; R. C. Chiang

1985-09-15T23:59:59.000Z

349

Instabilities in granular binary mixtures at moderate densities  

Science Journals Connector (OSTI)

A linear stability analysis of the Navier-Stokes (NS) granular hydrodynamic equations is performed to determine the critical length scale for the onset of vortices and clusters instabilities in granular dense binary mixtures. In contrast to previous attempts, our results (which are based on the solution to the inelastic Enskog equation to NS order) are not restricted to nearly elastic systems since they take into account the complete nonlinear dependence of the NS transport coefficients on the coefficients of restitution ?ij. The theoretical predictions for the critical length scales are compared to molecular dynamics (MD) simulations in flows of strong dissipation (?ij?0.7) and moderate solid volume fractions (??0.2). We find excellent agreement between MD and kinetic theory for the onset of velocity vortices, indicating the applicability of NS hydrodynamics to polydisperse flows even for strong inelasticity, finite density, and particle dissimilarity.

Peter P. Mitrano; Vicente Garz; Christine M. Hrenya

2014-02-10T23:59:59.000Z

350

Absolute Properties of the Eclipsing Binary Star AP Andromedae  

E-Print Network [OSTI]

AP And is a well-detached F5 eclipsing binary star for which only a very limited amount of information was available before this publication. We have obtained very extensive measurements of the light curve (19097 differential V magnitude observations) and a radial velocity curve (83 spectroscopic observations) which allow us to fit orbits and determine the absolute properties of the components very accurately: masses of 1.277 +/- 0.004 and 1.251 +/- 0.004 solar masses, radii of 1.233 +/- 0.006 and 1.1953 +/- 0.005 solar radii, and temperatures of 6565 +/- 150 K and 6495 +/- 150 K. The distance to the system is about 400 +/- 30 pc. Comparison with the theoretical properties of the stellar evolutionary models of the Yonsei-Yale series of Yi et al. shows good agreement between the observations and the theory at an age of about 500 Myr and a slightly sub-solar metallicity.

Lacy, Claud H Sandberg; Fekel, Francis C; Muterspaugh, Matthew W

2014-01-01T23:59:59.000Z

351

AA Dor - An Eclipsing sdOB - Brown Dwarf Binary  

E-Print Network [OSTI]

AA Dor is an eclipsing, close, post common-envelope binary consisting of a sdOB primary star and an unseen secondary with an extraordinary small mass - formally a brown dwarf. The brown dwarf may have been a former planet which survived a common envelope phase and has even gained mass. A recent determination of the components' masses from results of NLTE spectral analysis and subsequent comparison to evolutionary tracks shows a discrepancy to masses derived from radial-velocity and the eclipse curves. Phase-resolved high-resolution and high-SN spectroscopy was carried out in order to investigate on this problem. We present results of a NLTE spectral analysis of the primary, an analysis of its orbital parameters, and discuss possible evolutionary scenarios.

Thomas Rauch

2003-11-25T23:59:59.000Z

352

SPECTRAL PROPERTIES OF X-RAY BINARIES IN CENTAURUS A  

SciTech Connect (OSTI)

We present a spectral investigation of X-ray binaries (XBs) in NGC 5128 (Cen A), using six 100 ks Chandra observations taken over two months in 2007. We divide our sample into thermally and non-thermally dominated states based on the behavior of the fitted absorption column N{sub H}, and present the spectral parameters of sources with L{sub x} {approx}> 2 Multiplication-Sign 10{sup 37} erg s{sup -1}. The majority of sources are consistent with being neutron star low-mass X-ray binaries (NS LMXBs) and we identify three transient black hole (BH) LMXB candidates coincident with the dust lane, which is the remnant of a small late-type galaxy. Our results also provide tentative support for the apparent 'gap' in the mass distribution of compact objects between {approx}2-5 M{sub Sun }. We propose that BH LMXBs are preferentially found in the dust lane, and suggest this is because of the younger stellar population. The majority ({approx}70%-80%) of potential Roche lobe filling donors in the Cen A halo are {approx}> 12 Gyr old, while BH LMXBs require donors {approx}> 1 M{sub Sun} to produce the observed peak luminosities. This requirement for more massive donors may also explain recent results that claim a steepening of the X-ray luminosity function with age at L{sub x} {>=} 5 Multiplication-Sign 10{sup 38} erg s{sup -1} for the XB population of early-type galaxies; for older stellar populations, there are fewer stars {approx}> 1 M{sub Sun }, which are required to form the more luminous sources.

Burke, Mark J.; Raychaudhury, Somak [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)] [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Kraft, Ralph P.; Forman, William R.; Jones, Christine; Murray, Stephen S.; Birkinshaw, Mark; Evans, Daniel A.; Jordan, Andres [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Maccarone, Thomas J.; Croston, Judith H. [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom)] [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom); Brassington, Nicola J.; Hardcastle, Martin J.; Goodger, Joanna L. [School of Physics, Astronomy, and Mathematics, University of Hertfordshire, Hatfield AL10 9AB (United Kingdom)] [School of Physics, Astronomy, and Mathematics, University of Hertfordshire, Hatfield AL10 9AB (United Kingdom); Kainulainen, Jouni [Max-Planck-Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany)] [Max-Planck-Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany); Woodley, Kristin A. [Department of Physics and Astronomy, University of British Columbia, Vancouver BC V6T 1Z1 (Canada)] [Department of Physics and Astronomy, University of British Columbia, Vancouver BC V6T 1Z1 (Canada); Sivakoff, Gregory R. [Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)] [Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada); Gilfanov, Marat [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85741, Garching (Germany)] [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85741, Garching (Germany); Sarazin, Craig L. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States)] [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Voss, Rasmus, E-mail: mburke@star.sr.bham.ac.uk [Department of Astrophysics/IMAPP, Radboud, University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen (Netherlands)] [Department of Astrophysics/IMAPP, Radboud, University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen (Netherlands); and others

2013-04-01T23:59:59.000Z

353

THE INTERACTING EARLY-TYPE BINARY V382 Cyg  

SciTech Connect (OSTI)

We analyze photometric and spectroscopic data and study the orbital period of the early-type interacting binary system V382 Cyg by using all the available data. We obtain a simultaneous light and radial velocity curve solution. The derived physical parameters of the primary and secondary stellar components are M{sub 1} = 27.9(5) M{sub Sun }, M{sub 2} = 20.8(4) M{sub Sun }, R{sub 1} = 9.7(2) R{sub Sun }, R{sub 2} = 8.5(2) R{sub Sun }, log ({sub 1}/L{sub Sun }) = 5.152(20), and log (L{sub 2}/L{sub Sun }) = 4.954(19) while the separation of the components is a = 23.4 R{sub Sun }. Newly obtained parameters yield the distance of the system to be 1466(76) pc. Analyses of the mid-eclipse times indicate a period increase of dP/dt = 4.2(1) Multiplication-Sign 10{sup -7} days yr{sup -1} that can be interpreted in terms of the high-mass transfer (dM/dt 6.1(5) Multiplication-Sign 10{sup -6} M{sub Sun} yr{sup -1}) from the less massive component to the more massive component. Finally, we model the evolution of the components using non-conservative codes and discuss the results obtained. The age of the binary system is estimated to be 3.85 Myr.

Yasarsoy, B.; Yakut, K. [Department of Astronomy and Space Sciences, University of Ege, 35100 Bornova-Izmir (Turkey)

2013-01-01T23:59:59.000Z

354

Very Wide Binary Stars as the Primary Source of Stellar Collisions in the Galaxy  

Science Journals Connector (OSTI)

We present numerical simulations modeling the orbital evolution of very wide binaries, pairs of stars separated by over ~103AU. Due to perturbations from other passing stars and the Milky Way's tide, the orbits of very wide binary stars occasionally become extremely eccentric, which forces close encounters between the companion stars. We show that this process causes a stellar collision between very wide binary companion stars once every 1000-7500yr on average in the Milky Way. One of the main uncertainties in this collision rate is the amount of energy dissipated by dynamic tides during close (but not collisional) periastron passages. This dissipation presents a dynamical barrier to stellar collisions and can instead transform very wide binaries into close or contact binaries. However, for any plausible tidal dissipation model, very wide binary stars are an unrealized, and potentially the dominant, source of stellar collisions in our Galaxy. Such collisions should occur throughout the thin disk of the Milky Way. Stellar collisions within very wide binaries should yield a small population of single, Li-depleted, rapidly rotating massive stars.

Nathan A. Kaib; Sean N. Raymond

2014-01-01T23:59:59.000Z

355

Close Binary White Dwarfs, Neutron Stars, Black Holes: Formation, Evolution, and Related Phenomena  

E-Print Network [OSTI]

We review the formation and evolution of compact binary stars consisting of white dwarfs (WDs), neutron stars (NSs), and black holes (BHs). Mergings of compact binary stars are expected to be the most important sources for the forthcoming gravitational-wave (GW) astronomy. In the first part of the review, we discuss observational manifestations of close binary stars with NS and/or black components and their merger rate, crucial points in the formation and evolution of compact stars in binary systems, including the treatment of the natal kicks which NSs and BHs acquire during the core collapse of massive stars and the common envelope phase of binary evolution, which are most relevant to the merging rates of NS-NS, NS-BH and BH-BH binaries. The second part of the review is devoted mainly to formation and evolution of binary WDs and their observational manifestations, including their role as progenitors of cosmologically important thermonuclear SN~Ia. We also consider AM~CVn-stars which are thought to be the bes...

Postnov, Konstantin

2014-01-01T23:59:59.000Z

356

The Evolution of the Multiplicity of Embedded Protostars II: Binary Separation Distribution & Analysis  

E-Print Network [OSTI]

We present the Class I protostellar binary separation distribution based on the data tabulated in the companion paper. We verify the excess of Class I binary stars over solar-type main-sequence stars, especially at separations beyond 500 AU. Although our sources are in nearby star forming regions distributed across the entire sky (including Orion), none of our objects are in a high stellar density environment. The binary separation distribution changes significantly during the Class I phase, and the binary frequency at separations greater than 1000 AU declines steadily with respect to spectral index. Despite these changes, the binary frequency remains constant until the end of the Class I phase, when it drops sharply. We propose a scenario to account for the changes in the Class I binary separation distribution. This scenario postulates that companions with a separation greater than ~1000 AU were ejected during the Class 0 phase, but remain gravitationally bound due to the mass of the envelope. As the envelope dissipates, these companions become unbound and the binary frequency at wide separations declines. This scenario predicts that a large number of Class 0 objects should be non-hierarchical multiple systems, and that many Class I YSOs with a widely separated companion should also have a very close companion. We also find that Class I protostars are not dynamically pristine, and have experienced dynamical evolution before they are visible as Class I objects. For the first time, evidence is presented showing that the Class I binary frequency and the binary separation distribution strongly depend on the star forming environment. The reason for this dependence remains unclear.

Michael Connelley; Bo Reipurth; Alan Tokunaga

2008-03-07T23:59:59.000Z

357

Formalism for the construction of binary neutron stars with arbitrary circulation  

SciTech Connect (OSTI)

Most numerical models of binary stars - in particular neutron stars in compact binaries - assume the companions to be either corotational or irrotational. Either one of these assumptions leads to a significant simplification in the hydrodynamic equations of stationary equilibrium. In this paper we develop a new formalism for the construction of binary stars with circulation intermediate between corotational and irrotational. Generalizing the equations for irrotational flow we cast the Euler equation, which is an algebraic equation in the case of corotational or irrotational fluid flow, as an elliptic equation for a new auxiliary quantity. We also suggest a parametrized decomposition of the fluid flow that allows for a variation of the stellar circulation.

Baumgarte, Thomas W. [Department of Physics and Astronomy, Bowdoin College, Brunswick, Maine 04011 (United States); Shapiro, Stuart L. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2009-09-15T23:59:59.000Z

358

BINARIES DISCOVERED BY THE MUCHFUSS PROJECT: SDSS J08205+0008-AN ECLIPSING SUBDWARF B BINARY WITH A BROWN DWARF COMPANION  

SciTech Connect (OSTI)

Hot subdwarf B stars (sdBs) are extreme horizontal branch stars believed to originate from close binary evolution. Indeed about half of the known sdB stars are found in close binaries with periods ranging from a few hours to a few days. The enormous mass loss required to remove the hydrogen envelope of the red-giant progenitor almost entirely can be explained by common envelope ejection. A rare subclass of these binaries are the eclipsing HW Vir binaries where the sdB is orbited by a dwarf M star. Here, we report the discovery of an HW Vir system in the course of the MUCHFUSS project. A most likely substellar object ({approx_equal}0.068 M{sub sun}) was found to orbit the hot subdwarf J08205+0008 with a period of 0.096 days. Since the eclipses are total, the system parameters are very well constrained. J08205+0008 has the lowest unambiguously measured companion mass yet found in a subdwarf B binary. This implies that the most likely substellar companion has not only survived the engulfment by the red-giant envelope, but also triggered its ejection and enabled the sdB star to form. The system provides evidence that brown dwarfs may indeed be able to significantly affect late stellar evolution.

Geier, S.; Schaffenroth, V.; Drechsel, H.; Heber, U.; Kupfer, T.; Tillich, A. [Dr. Remeis-Observatory and ECAP, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuernberg, Sternwartstr. 7, 96049 Bamberg (Germany); Oestensen, R. H.; Smolders, K.; Degroote, P. [Institute of Astronomy, K.U. Leuven, Celestijnenlaan 200D, B-3001 Heverlee (Belgium); Maxted, P. F. L. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG (United Kingdom); Barlow, B. N. [Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255 (United States); Gaensicke, B. T.; Marsh, T. R. [Department of Physics, University of Warwick, Conventry CV4 7AL (United Kingdom); Napiwotzki, R., E-mail: geier@sternwarte.uni-erlangen.de [Centre of Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB (United Kingdom)

2011-04-20T23:59:59.000Z

359

ANALYSIS OF 2H-EVAPORATOR SCALE WALL [HTF-13-82] AND POT BOTTOM [HTF-13-77] SAMPLES  

SciTech Connect (OSTI)

Savannah River Remediation (SRR) is planning to remove a buildup of sodium aluminosilicate scale from the 2H-evaporator pot by loading and soaking the pot with heated 1.5 M nitric acid solution. Sampling and analysis of the scale material has been performed so that uranium and plutonium isotopic analysis can be input into a Nuclear Criticality Safety Assessment (NCSA) for scale removal by chemical cleaning. Historically, since the operation of the Defense Waste Processing Facility (DWPF), silicon in the DWPF recycle stream combines with aluminum in the typical tank farm supernate to form sodium aluminosilicate scale mineral deposits in the 2Hevaporator pot and gravity drain line. The 2H-evaporator scale samples analyzed by Savannah River National Laboratory (SRNL) came from the bottom cone sections of the 2H-evaporator pot [Sample HTF-13-77] and the wall 2H-evaporator [sample HTF-13-82]. X-ray diffraction analysis (XRD) confirmed that both the 2H-evaporator pot scale and the wall samples consist of nitrated cancrinite (a crystalline sodium aluminosilicate solid) and clarkeite (a uranium oxy-hydroxide mineral). On as received basis, the bottom pot section scale sample contained an average of 2.59E+00 1.40E-01 wt % total uranium with a U-235 enrichment of 6.12E-01 1.48E-02 %, while the wall sample contained an average of 4.03E+00 9.79E-01 wt % total uranium with a U-235 enrichment of 6.03E-01% 1.66E-02 wt %. The bottom pot section scale sample analyses results for Pu-238, Pu-239, and Pu-241 are 3.16E- 05 5.40E-06 wt %, 3.28E-04 1.45E-05 wt %, and <8.80E-07 wt %, respectively. The evaporator wall scale samples analysis values for Pu-238, Pu-239, and Pu-241 averages 3.74E-05 6.01E-06 wt %, 4.38E-04 5.08E-05 wt %, and <1.38E-06 wt %, respectively. The Pu-241 analyses results, as presented, are upper limit values. These results are provided so that SRR can calculate the equivalent uranium-235 concentrations for the NCSA. Results confirm that the uranium contained in the scale remains depleted with respect to natural uranium. SRNL did not calculate an equivalent U-235 enrichment, which takes into account other fissionable isotopes U-233, Pu-239 and Pu-241. The applicable method for calculation of equivalent U-235 will be determined in the NCSA.

Oji, L.

2013-06-21T23:59:59.000Z

360

Organic carbon and nitrogen in the surface sediments of world oceans and seas: distribution and relationship to bottom topography  

SciTech Connect (OSTI)

Information dealing with the distribution of organic carbon and nitrogen in the top sediments of world oceans and seas has been gathered and evaluated. Based on the available information a master chart has been constructed which shows world distribution of sedimentary organic matter in the oceans and seas. Since organic matter exerts an influence upon the settling properties of fine inorganic particles, e.g. clay minerals and further, the interaction between organic matter and clay minerals is maximal, a relationship between the overall bottom topography and the distribution of clay minerals and organic matter should be observable on a worldwide basis. Initial analysis of the available data indicates that such a relationship does exist and its significance is discussed.

Premuzic, E.T.

1980-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Analysis Of 2H-Evaporator Scale Wall [HTF-13-82] And Pot Bottom [HTF-13-77] Samples  

SciTech Connect (OSTI)

Savannah River Remediation (SRR) is planning to remove a buildup of sodium aluminosilicate scale from the 2H-evaporator pot by loading and soaking the pot with heated 1.5 M nitric acid solution. Sampling and analysis of the scale material has been performed so that uranium and plutonium isotopic analysis can be input into a Nuclear Criticality Safety Assessment (NCSA) for scale removal by chemical cleaning. Historically, since the operation of the Defense Waste Processing Facility (DWPF), silicon in the DWPF recycle stream combines with aluminum in the typical tank farm supernate to form sodium aluminosilicate scale mineral deposits in the 2H-evaporator pot and gravity drain line. The 2H-evaporator scale samples analyzed by Savannah River National Laboratory (SRNL) came from two different locations within the evaporator pot; the bottom cone sections of the 2H-evaporator pot [Sample HTF-13-77] and the wall 2H-evaporator [sample HTF-13-82]. X-ray diffraction analysis (XRD) confirmed that both the 2H-evaporator pot scale and the wall samples consist of nitrated cancrinite (a crystalline sodium aluminosilicate solid) and clarkeite (a uranium oxyhydroxide mineral). On ''as received'' basis, the bottom pot section scale sample contained an average of 2.59E+00 {+-} 1.40E-01 wt % total uranium with a U-235 enrichment of 6.12E-01 {+-} 1.48E-02 %, while the wall sample contained an average of 4.03E+00 {+-} 9.79E-01 wt % total uranium with a U-235 enrichment of 6.03E-01% {+-} 1.66E-02 wt %. The bottom pot section scale sample analyses results for Pu-238, Pu-239, and Pu-241 are 3.16E-05 {+-} 5.40E-06 wt %, 3.28E-04 {+-} 1.45E-05 wt %, and <8.80E-07 wt %, respectively. The evaporator wall scale samples analysis values for Pu-238, Pu-239, and Pu-241 averages 3.74E-05 {+-} 6.01E-06 wt %, 4.38E-04 {+-} 5.08E-05 wt %, and <1.38E-06 wt %, respectively. The Pu-241 analyses results, as presented, are upper limit values. For these two evaporator scale samples obtained at two different locations within the evaporator pot the major radioactive components (on a mass basis) in the additional radionuclide analyses were Sr-90, Cs-137 Np-237, Pu-239/240 and Th-232. Small quantities of americium and curium were detected in the blanks used for Am/Cm method for these radionuclides. These trace radionuclide amounts are assumed to come from airborne contamination in the shielded cells drying or digestion oven, which has been replaced. Therefore, the Am/Cm results, as presented, may be higher than the true Am/Cm values for these samples. These results are provided so that SRR can calculate the equivalent uranium-235 concentrations for the NCSA. Results confirm that the uranium contained in the scale remains depleted with respect to natural uranium. SRNL did not calculate an equivalent U-235 enrichment, which takes into account other fissionable isotopes U-233, Pu-239 and Pu-241. The applicable method for calculation of equivalent U-235 will be determined in the NCSA. With a few exceptions, a comparison of select radionuclides measurements from this 2013 2H evaporator scale characterization (pot bottom and wall scale samples) with those measurements for the same radionuclides in the 2010 2H evaporator scale analysis shows that the radionuclide analysis for both years are fairly comparable; the analyses results are about the same order of magnitude.

Oji, L. N.

2013-09-11T23:59:59.000Z

362

Supercomputers Crack Sixty-Trillionth Binary Digit of Pi-Squared |  

Broader source: Energy.gov (indexed) [DOE]

Supercomputers Crack Sixty-Trillionth Binary Digit of Pi-Squared Supercomputers Crack Sixty-Trillionth Binary Digit of Pi-Squared Supercomputers Crack Sixty-Trillionth Binary Digit of Pi-Squared April 28, 2011 - 11:28am Addthis David H. Bailey | Photo Courtesy of Lawrence Berkely National Lab David H. Bailey | Photo Courtesy of Lawrence Berkely National Lab Linda Vu What are the key facts? Australian researchers have found the sixty-trillionth binary digit of Pi-squared. The calculation would have taken a single computer processor unit (CPU) 1,500 years to calculate, but it took just a few months on IBM's "BlueGene/P" supercomputer, which is designed to run continuously at one quadrillion calculations per second. Pi is one of the most mysterious numbers in mathematics and can never be expressed as a finite decimal number -- humanity will never have

363

Probability distribution function for inclinations of merging compact binaries detected by gravitational wave interferometers  

E-Print Network [OSTI]

We analytically discuss probability distribution function (PDF) for inclinations of merging compact binaries whose gravitational waves are coherently detected by a network of ground based interferometers. The PDF would be useful for studying prospects of (1) simultaneously detecting electromagnetic signals (such as gamma-ray-bursts) associated with binary mergers and (2) statistically constraining the related theoretical models from the actual observational data of multi-messenger astronomy. Our approach is similar to Schutz (2011), but we explicitly include the dependence of the polarization angles of the binaries, based on the concise formulation given in Cutler and Flanagan (1994). We find that the overall profiles of the PDFs are similar for any networks composed by the second generation detectors (Advanced-LIGO, Advanced-Virgo, KAGRA, LIGO-India). For example, 5.1% of detected binaries would have inclination angle less than 10 degree with at most 0.1% differences between the potential networks. A perturb...

Seto, Naoki

2014-01-01T23:59:59.000Z

364

Non-Oberbeck-Boussinesq effects and barodiffusion in binary mixtures with small thermodiffusion ratio  

Science Journals Connector (OSTI)

For a binary-fluid layer heated from below, we evaluate the effects of the temperature and concentration dependence of the thermodiffusion ratio kT as well as the influence of barodiffusion on the conductive state and its stability.

S. J. Linz and M. Lcke

1987-10-01T23:59:59.000Z

365

E-Print Network 3.0 - adc x-ray binary Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

-Planck code and its applications . . . 63 3.6.7 Observation of X-ray binaries with Simbol... for the hard X-ray emission of accreting black holes sources (both in Seyfert...

366

First all-sky search for continuous gravitational waves from unknown sources in binary systems  

E-Print Network [OSTI]

We present the first results of an all-sky search for continuous gravitational waves from unknown spinning neutron stars in binary systems using LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect ...

Aggarwal, Nancy

367

Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network  

E-Print Network [OSTI]

Compact binary systems with neutron stars or black holes are one of the most promising sources for ground-based gravitational-wave detectors. Gravitational radiation encodes rich information about source physics; thus ...

Barsotti, Lisa

368

X-ray spectroscopy of neutron star low-mass X-ray binaries  

E-Print Network [OSTI]

In this thesis, I present work spanning a variety of topics relating to neutron star lowmass X-ray binaries (LMXBs) and utilize spectral information from X-ray observations to further our understanding of these sources. ...

Krauss, Miriam Ilana

2007-01-01T23:59:59.000Z

369

On the rarity of x-ray binaries with Wolf-Rayet donors  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

The paucity of High mass X-Ray binaries (HMXB) consisting of a neutron star (NS) accretor and Wolf-Rayet (WR) donor has long been at odds with expectations from population synthesis studies indicating that these systems should survive as the evolved offspring of the observed HMXB population. This tension is particularly troubling in light of recent observations uncovering a preponderance of HMXBs containing loosely bound Be donors which would be expected to naturally evolve into WR-HMXBs. Reconciling the unexpectedly large population of Be-HMXBs with the lack of observed WR-HMXB sources thus serves to isolate the dynamics of CE physics from other binary evolution parameters. Here, we find that binary mergers during CE events must be common in order to resolve tension between these observed populations. Furthermore, future observations which better constrain the background population of loosely bound O/B-NS binaries are likely to place significant constraints on the efficiency of CE removal.

Linden, T; Valsecchi, F; Kalogera, V

2012-03-06T23:59:59.000Z

370

Hydrodynamic Model with Binary Particle Diameters to Predict Axial Voidage Profile in a CFB Combustor  

Science Journals Connector (OSTI)

A hydrodynamic model with binary particle diameters was developed to better predict axial voidage profile in a CFB combustor. In the model, the CFB is regarded as a superposition of two ... field data of voidage ...

J. J. Li; H. Zhang; H. R. Yang; Y. X. Wu

2010-01-01T23:59:59.000Z

371

The Binary Cooling Tower Process: An Energy Conserving Water Reuse Technology  

E-Print Network [OSTI]

The Binary Cooling Tower (BCT) harnesses cooling system waste heat to accomplish concentration of waste and process streams. The BCT can also be integrated to isolate and improve the efficiency of critical cooling loops. This paper describes the BCT...

Lancaster, R. L.; Sanderson, W. G.; Cooke, R. L., Jr.

1981-01-01T23:59:59.000Z

372

Observational and evolutionary studies of neutron star X-ray binaries  

E-Print Network [OSTI]

In this thesis, we present our observational and evolutionary studies of neutron stars in X-ray binary systems. A variety of topics are discussed, which are all related by a single scientific theme, namely, helping to set ...

Lin, Jinrong, Ph. D. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

373

Adsorption and desorption of binary mixtures of volatile organic contaminants on soil  

E-Print Network [OSTI]

, the potential theory and the ideal adsorbed solution theory for mixture adsorption were also evaluated for prediction of the experimental results for binary adsorption. All models failed for prediction of the BET type III isotherms when methanol was present...

Guo, Yang

2012-06-07T23:59:59.000Z

374

The Volatility and the Thermal Storage Performance of Binary Polyalcohol Systems Used in the Wall  

E-Print Network [OSTI]

In this paper, the volatility of binary systems, consisting of neopentylglycol(NPG), pentaerythritol(PE) and trihytdroxy methyl-aminomethane(TAM) with different components, was studied experimentally. In the solid -solid phase change process...

Yan, Q.

2006-01-01T23:59:59.000Z

375

Textural Characterization of Pilc Montmorillonite Pillared with Binary Oxides LaNiOx  

Science Journals Connector (OSTI)

Montmorillonite pillared clay was synthesized by intercalation of binuclear complex of the form NiLa(fsaen)NO3 and subsequent calcination at 500C. The binary oxides of the form NiLaOx thus created inside the lay...

S. P. Skaribas; P. J. Pomonis; P. Grange

1993-01-01T23:59:59.000Z

376

A Static Birthmark of Binary Executables Based on API Call Structure  

Science Journals Connector (OSTI)

A software birthmark is a unique characteristic of a program that can be used as a software theft detection. In this paper we suggest and empirically evaluate a static birthmark of binary executables based on API

Seokwoo Choi; Heewan Park; Hyun-il Lim

2007-01-01T23:59:59.000Z

377

Effect of eccentricity on binary neutron star searches in Advanced LIGO  

E-Print Network [OSTI]

Binary neutron stars (BNSs) are the primary source of gravitational waves for the Laser Interferometer Gravitational-Wave Observatory (LIGO) and its international partners Virgo and KAGRA. Current BNS searches target field binaries whose orbits will have circularized by radiation reaction before their gravitational waves enter the Advanced LIGO sensitive band at 15 Hz. It has been suggested that a population of BNSs may form by n-body interactions near supermassive black holes or in globular clusters and that these systems may have non-negligible eccentricity in the Advanced LIGO band. We show that for BNS systems with total mass of 2.4 (6.0) solar masses, the effect of eccentricity e search is effectual for these binaries. For eccentricities up to e = 0.4, we investigate the selection bias caused by neglecting eccentricity in BNS searches. If such high eccentricity systems exist, searches that specifically target eccentric binaries will be needed in Advanced LIGO and Virgo.

E. A. Huerta; Duncan A. Brown

2013-06-07T23:59:59.000Z

378

RADIAL VELOCITIES OF GALACTIC O-TYPE STARS. II. SINGLE-LINED SPECTROSCOPIC BINARIES  

SciTech Connect (OSTI)

We report on new radial velocity measurements of massive stars that are either suspected binaries or lacking prior observations. This is part of a survey to identify and characterize spectroscopic binaries among O-type stars with the goal of comparing the binary fraction of field and runaway stars with those in clusters and associations. We present orbits for HDE 308813, HD 152147, HD 164536, BD-16 Degree-Sign 4826, and HDE 229232, Galactic O-type stars exhibiting single-lined spectroscopic variation. By fitting model spectra to our observed spectra, we obtain estimates for effective temperature, surface gravity, and rotational velocity. We compute orbital periods and velocity semiamplitudes for each system and note the lack of photometric variation for any system. These binaries probably appear single-lined because the companions are faint and because their orbital Doppler shifts are small compared to the width of the rotationally broadened lines of the primary.

Williams, S. J.; Gies, D. R. [Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, GA 30302-4106 (United States); Hillwig, T. C. [Department of Physics and Astronomy, Valparaiso University, Valparaiso, IN 46383 (United States); McSwain, M. V. [Department of Physics, Lehigh University, 16 Memorial Drive East, Bethlehem, PA 18015 (United States); Huang, W., E-mail: swilliams@chara.gsu.edu, E-mail: gies@chara.gsu.edu, E-mail: todd.hillwig@valpo.edu, E-mail: mcswain@lehigh.edu, E-mail: hwenjin@astro.washington.edu [Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States)

2013-02-01T23:59:59.000Z

379

Binary Restoration of Thin Objects in Multidimensional Imagery Jeffrey E. Boyd  

E-Print Network [OSTI]

Binary Restoration of Thin Objects in Multidimensional Imagery Jeffrey E. Boyd Department becomes trivial. Such is the case #12; Boyd and Meloche, PAMI, Vol. 20, No. 6, p647--651, June 98. 2 (a

Boyd, Jeffrey E.

380

Heat Pipe Performance Enhancement with Binary Mixture Fluids that Exhibit Strong Concentration Marangoni Effects  

E-Print Network [OSTI]

on a flat-plate solar heat collector with integrated solarBinary Mixture Nucleate Boiling Heat Transfer CorrelationsG.E. , 1965, A study of heat transfer in nucleate pool

Armijo, Kenneth Miguel

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Report on the first binary black hole inspiral search in LIGO data  

E-Print Network [OSTI]

The LIGO Scientific Collaboration is currently engaged in the first search for binary black hole inspiral signals in real data. We are using the data from the second LIGO science run and we focus on inspiral signals coming from binary systems with component masses between 3 and 20 solar masses. We describe the analysis methods used and report on preliminary estimates for the sensitivities of the LIGO instruments during the second science run.

Eirini Messaritaki; for the LIGO Scientific Collaboration

2005-04-14T23:59:59.000Z

382

An experimental investigation of binary solidification in a vertical channel with thermal and solutal mixed convection  

SciTech Connect (OSTI)

Experimental measurements and photographic observations are presented for the solidification of a binary, aqueous ammonium chloride solution in a vertical channel. Transient liquidus front progressions and temperature measurements are used to characterize the influences of flow rate, superheat, composition, and chill wall temperature on binary phase-change behavior. Experimental results are compared with previously reported model predictions and discrepancies are used to critically assess model assumptions and limitations.

Bennon, W.D. (Aluminum Company of America, Alcoa Center, PA 15069 (USA)); Incropera, F.P. (Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907 (USA))

1989-08-01T23:59:59.000Z

383

Gravitational Waves from Coalescing Binary Black Holes: Theoretical and Experimental Challenges  

ScienceCinema (OSTI)

A network of ground-based interferometric gravitational wave detectors (LIGO/VIRGO/GEO/...) is currently taking data near its planned sensitivity. Coalescing black hole binaries are among the most promising, and most exciting, gravitational wave sources for these detectors. The talk will review the theoretical and experimental challenges that must be met in order to successfully detect gravitational waves from coalescing black hole binaries, and to be able to reliably measure the physical parameters of the source (masses, spins, ...).

None

2011-10-06T23:59:59.000Z

384

Effects of a sulfide system produced by a natural brine seep on sandy-bottom community structure at the East Flower Garden Bank, northwest Gulf of Mexico  

E-Print Network [OSTI]

EFFECTS OF A SULFIDE SYSTEM PRODUCED BY A NATURAL BRINE SEEP ON SANDY-BOTTOM COI'1MUNITY STRUCTURE AT THE EAST FLOWER GARDEN BANK, NORTHWEST GULF OF MEXICO A Thesis by EDWARD ANDREW WOODS Submitted to the Graduate College of Texas ASM... University in partia 1 fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1982 Major Subject: Oceanography EFFECTS OF A SULFIDE SYSTEM PRODUCED BY A NATURAL BRINE SEEP ON SANDY-BOTTOM COMMUNITY STRUCTURE AT THE EAST FLOWER...

Woods, Edward Andrew

2012-06-07T23:59:59.000Z

385

Cotton forward contracting in the Brazos bottom and lower Rio Grande valley and grain sorghum forward contracting in the coastal bend of Texas  

E-Print Network [OSTI]

' revue P. iclt Unfversit:y xn Iicrtial futf illicent of the requirement for th' degree of MASTER OF SCIENCE December 1978 I'ejor 9 ili joe:ri: Pgricu1iurul Ecnnom'ce COTZ01 OPWARD CONTRACTING IN THE BRAEOS BOTTOM AND LOWER RIO GRANDE VALLEY... AND GRAIN SORGNIM FOPhVBO CONTRACTING IN THE COASTAL BEND OP TEXAS A Thesis by C. PARR ROSSON III Approved as to style and content by: (Chairmen of Conunittee) (& . er) (Nembcr D?ce&nber 1978 ABSTRACT Cotton Forward Contracting in the Brazos Bottom...

Rosson, C. Parr

2012-06-07T23:59:59.000Z

386

The detectability of eccentric compact binary coalescences with advanced gravitational-wave detectors  

E-Print Network [OSTI]

Compact binary coalescences are a promising source of gravitational waves for second-generation interferometric gravitational-wave detectors such as advanced LIGO and advanced Virgo. While most binaries are expected to possess circular orbits, some may be eccentric, for example, if they are formed through dynamical capture. Eccentric orbits can create difficulty for matched filtering searches due to the challenges of creating effective template banks to detect these signals. In previous work, we showed how seedless clustering can be used to detect low-mass ($M_\\text{total}\\leq10M_\\odot$) compact binary coalescences for both spinning and eccentric systems, assuming a circular post-Newtonian expansion. Here, we describe a parameterization that is designed to maximize sensitivity to low-eccentricity ($0\\leq\\epsilon\\leq0.6$) systems, derived from the analytic equations. We show that this parameterization provides a robust and computationally efficient method for detecting eccentric low-mass compact binaries. Based on these results, we conclude that advanced detectors will have a chance of detecting eccentric binaries if optimistic models prove true. However, a null observation is unlikely to firmly rule out models of eccentric binary populations.

Michael Coughlin; Patrick Meyers; Eric Thrane; Jialun Luo; Nelson Christensen

2014-12-19T23:59:59.000Z

387

A simple model of complete precessing black-hole-binary gravitational waveforms  

E-Print Network [OSTI]

The construction of a model of the gravitational-wave (GW) signal from generic configurations of spinning-black-hole binaries, through inspiral, merger and ringdown, is one of the most pressing theoretical problems in the build-up to the era of GW astronomy. We present the first such model in the frequency domain, "PhenomP", which captures the basic phenomenology of the seven-dimensional parameter space of binary configurations with only three key physical parameters. Two of these (the binary's mass ratio and an effective total spin parallel to the orbital angular momentum, which determines the inspiral rate) define an underlying non-precessing-binary model. The non-precessing-binary waveforms are then "twisted up" with approximate expressions for the precessional motion, which require only one additional physical parameter, an effective precession spin, $\\chi_p$. All other parameters (total mass, sky location, orientation and polarisation, and initial phase) can be specified trivially. The model is constructed in the frequency domain, which will be essential for efficient GW searches and source measurements. We have tested the model's fidelity for GW applications by comparison against hybrid post-Newtonian-numerical-relativity waveforms at a variety of configurations --although we did not use these numerical simulations in the construction of the model. Our model can be used to develop GW searches, to study the implications for astrophysical measurements, and as a simple conceptual framework to form the basis of generic-binary waveform modelling in the advanced-detector era.

Mark Hannam; Patricia Schmidt; Alejandro Boh; Leila Haegel; Sascha Husa; Frank Ohme; Geraint Pratten; Michael Prrer

2014-09-19T23:59:59.000Z

388

LBQS 0103-2753 A 0.3 Arcsec Binary Quasar  

E-Print Network [OSTI]

Imaging and spectroscopy with HST show that LBQS 0103-2753 (V = 17.8, z = 0.848) is a binary quasar with a separation of 0.3 arcsec or 2.3 kpc. This is by far the smallest separation binary quasar reported to date. The two components have very different spectra, including the presence of strong broad absorption lines (BALs) in component A only. The emission-line redshifts, based on the broad high ionization C IV lines, are z_A = 0.834 and z_B = 0.858; their difference is 3900 km/s in velocity units. The broad C IV lines, however, are probably not a good indicator of systemic redshift; and LBQS 0103-2753 A and B could have a much smaller systemic redshift difference, like the other known binary quasars. If the systemic redshift difference is small, then LBQS 0103-2753 would most likely be a galaxy merger that has led to a binary supermassive black hole. There is now one known 0.3 arcsec binary among roughly 500 QSOs that have been observed in a way that would reveal such a close binary. This suggests that QSO ...

Junkkarinen, V T; Beaver, E A; Burbidge, Eleanor Margaret; Cohen, R D; Hamann, F W; Lyons, R W

2001-01-01T23:59:59.000Z

389

How does a thermal binary crystal break under shear?  

E-Print Network [OSTI]

When exposed to strong shearing, the particles in a crystal will rearrange and ultimately, the crystal will break by forming large nonaffine defects. Even for the initial stage of this process, only little effort has been devoted to the understanding of the breaking process on the scale of the individual particle size for thermalized mixed crystals. Here, we explore the shear-induced breaking for an equimolar two-dimensional binary model crystal with a high interaction asymmetry between the two different species such that the initial crystal has an intersecting square sublattice of the two constituents. Using Brownian dynamics computer simulations, we show that the combination of shear and thermal fluctuations leads to a characteristic hierarchical breaking scenario where initially, the more strongly coupled particles are thermally distorted, paving the way for the weakly coupled particles to escape from their cage. This in turn leads to mobile defects which may finally merge, proliferating a cascade of defects, which triggers the final breakage of the crystal. This scenario is in marked contrast to the breakage of one-component crystals close to melting. Moreover, we explore the orientational dependence of the initial shear direction relative to the crystal orientation and compare this to the usual melting scenario without shear. Our results are verifiable in real-space experiments of superparamagnetic colloidal mixtures at a pending air-water interface in an external magnetic field where the shear can be induced by an external laser field.

Tobias Horn; Hartmut Lwen

2014-11-21T23:59:59.000Z

390

Magnetospheric Eclipses in the Binary Pulsar J0737-3039  

E-Print Network [OSTI]

(Abridged) In the binary radio pulsar system J0737-3039, the faster pulsar A is eclipsed once per orbit. We construct a simple geometric model which successfully reproduces the eclipse light curves, based on the idea that the radio pulses are attenuated by synchrotron absorption on the closed magnetic field lines of pulsar B. The model explains most of the properties of the eclipse: its asymmetric form, the nearly frequency-independent duration, and the modulation of the brightness of pulsar A at both once and twice the rotation frequency of pulsar B in different parts of the eclipse. This detailed agreement confirms the dipolar structure of the star's poloidal magnetic field. The model makes clear predictions for the degree of linear polarization of the transmitted radiation. The weak frequency dependence of the eclipse duration implies that the absorbing plasma is relativistic, with a density much larger than the corotation charge density. Such hot, dense plasma can be effectively stored in the outer magnetosphere, where cyclotron cooling is slow. The gradual loss of particles inward through the cooling radius is compensated by an upward flux driven by a fluctuating component of the current, and by the pumping of magnetic helicity on the closed field lines. The trapped particles are heated to relativistic energies by the damping of magnetospheric turbulence and, at a slower rate, by the absorption of the radio emission of the companion pulsar.

Maxim Lyutikov; Christopher Thompson

2005-02-17T23:59:59.000Z

391

A magnetic white dwarf in a detached eclipsing binary  

E-Print Network [OSTI]

SDSS J030308.35+005444.1 is a close, detached, eclipsing white dwarf plus M dwarf binary which shows a large infrared excess which has been interpreted in terms of a circumbinary dust disk. In this paper we present optical and near-infrared photometric and spectroscopic data for this system. At optical wavelengths we observe heated pole caps from the white dwarf caused by accretion of wind material from the main-sequence star on to the white dwarf. At near-infrared wavelengths we see the eclipse of two poles on the surface of the white dwarf by the main-sequence star, indicating that the white dwarf is magnetic. Our spectroscopic observations reveal Zeeman split emission lines in the hydrogen Balmer series, which we use to measure the magnetic field strength as 8MG. This measurement indicates that the cyclotron lines are located in the infrared, naturally explaining the infrared excess without the need for a circumbinary dust disk. We also detect magnetically-confined material located roughly midway between t...

Parsons, S G; Gnsicke, B T; Schreiber, M R; Bours, M C P; Dhillon, V S; Littlefair, S P

2013-01-01T23:59:59.000Z

392

Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries  

Science Journals Connector (OSTI)

Helium that accretes onto a carbon/oxygen white dwarf in double white dwarf AM Canum Venaticorum (AM CVn) binaries undergoes unstable thermonuclear flashes when the orbital period is in the 3.5-25 minute range. At the shortest orbital periods (and highest accretion rates, > 10-7 M? yr-1), the flashes are weak and likely lead to the helium equivalent of classical nova outbursts. However, as the orbit widens and drops, the mass required for the unstable ignition increases, leading to progressively more violent flashes up to a final flash with helium shell mass ?0.02-0.1 M?. The high pressures of these last flashes allow the burning to produce the radioactive elements 48Cr, 52Fe, and 56Ni that power a faint (MV = -15 to -18) and rapidly rising (few days) thermonuclear supernova. Current galactic AM CVn space densities imply one such explosion every 5,000-15,000 years in 1011 M? of old stars (?2%-6% of the Type Ia rate in E/SO galaxies). These ".Ia" supernovae (one-tenth as bright for one-tenth the time as a Type Ia supernovae) are excellent targets for deep (e.g., V = 24) searches with nightly cadences, potentially yielding an all-sky rate of 1000 per year.

Lars Bildsten; Ken J. Shen; Nevin N. Weinberg; Gijs Nelemans

2007-01-01T23:59:59.000Z

393

Magnetic energy production by turbulence in binary neutron star mergers  

E-Print Network [OSTI]

The simultaneous detection of electromagnetic and gravitational wave emission from merging neutron star binaries would aid greatly in their discovery and interpretation. By studying turbulent amplification of magnetic fields in local high-resolution simulations of neutron star merger conditions, we demonstrate that magnetar-level (~10^16) G fields are present throughout the merger duration. We find that the small-scale turbulent dynamo converts 60% of the randomized kinetic energy into magnetic fields on a merger time scale. Since turbulent magnetic energy dissipates through reconnection events which accelerate relativistic electrons, turbulence may facilitate the conversion of orbital kinetic energy into radiation. If 10^-4 of the ~ 10^53 erg of orbital kinetic available gets processed through reconnection, and creates radiation in the 15-150 keV band, then the fluence at 200 Mpc would be 10^-7 erg/cm^2, potentially rendering most merging neutron stars in the advanced LIGO and Virgo detection volumes detecta...

Zrake, Jonathan

2013-01-01T23:59:59.000Z

394

Irradiation-induced composition patterns in binary solid solutions  

SciTech Connect (OSTI)

A theoretical/computational model for the irradiation-driven compositional instabilities in binary solid solutions has been developed. The model is suitable for investigating the behavior of structural alloys and metallic nuclear fuels in a reactor environment as well as the response of alloy thin films to ion beam irradiation. The model is based on a set of reaction-diffusion equations for the dynamics of vacancies, interstitials, and lattice atoms under irradiation. The dynamics of these species includes the stochastic generation of defects by collision cascades as well as the defect reactions and diffusion. The atomic fluxes in this model are derived based on the transitions of lattice defects. The set of reaction-diffusion equations are stiff, hence a stiffly stable method, also known as the Gear method, has been used to numerically approximate the equations. For the Cu-Au alloy in the solid solution regime, the model results demonstrate the formation of compositional patterns under high-temperature particle irradiation, with Fourier space properties (Fourier spectrum, average wavelength, and wavevector) depending on the cascade damage characteristics, average composition, and irradiation temperature.

Dubey, Santosh; El-Azab, Anter [School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47906 (United States)] [School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47906 (United States)

2013-09-28T23:59:59.000Z

395

Summary of Historical Production for Nevada Binary Facilities  

SciTech Connect (OSTI)

The analysis described was initiated to validate inputs used in the US Department of Energys (DOE) economic modeling tool GETEM (Geothermal Electricity Technology Evaluation Model) by using publically available data to identify production trends at operating geothermal binary facilities in the state of Nevada. Data required for this analysis was obtained from the Nevada Bureau of Mines and Geology (NBMG), whom received the original operator reports from the Nevada Division of Minerals (NDOM). The data from the NBMG was inputted into Excel files that have been uploaded to the DOEs National Geothermal Data System (NGDS). Once data was available in an Excel format, production trends for individual wells and facilities could be established for the periods data was available (thru 2009). Additionally, this analysis identified relationships existing between production (temperature and flow rates), power production and plant conversion efficiencies. The data trends showed that temperature declines have a significant impact on power production, and that in some instances operators increased production flow rate to offset power declines. The production trends with time that were identified are being used to update GETEMs default inputs.

Mines, Greg; Hanson, Hillary

2014-09-01T23:59:59.000Z

396

Dynamical evolution of quasi-circular binary black hole data  

E-Print Network [OSTI]

We study the fully nonlinear dynamical evolution of binary black hole data, whose orbital parameters are specified via the effective potential method for determining quasi-circular orbits. The cases studied range from the Cook-Baumgarte innermost stable circular orbit (ISCO) to significantly beyond that separation. In all cases we find the black holes to coalesce (as determined by the appearance of a common apparent horizon) in less than half an orbital period. The results of the numerical simulations indicate that the initial holes are not actually in quasi-circular orbits, but that they are in fact nearly plunging together. The dynamics of the final horizon are studied to determine physical parameters of the final black hole, such as its spin, mass, and oscillation frequency, revealing information about the inspiral process. We show that considerable resolution is required to extract accurate physical information from the final black hole formed in the merger process, and that the quasi-normal modes of the final hole are strongly excited in the merger process. For the ISCO case, by comparing physical measurements of the final black hole formed to the initial data, we estimate that less than 3% of the total energy is radiated in the merger process.

Miguel Alcubierre; Bernd Bruegmann; Peter Diener; F. Siddhartha Guzman; Ian Hawke; Scott Hawley; Frank Herrmann; Michael Koppitz; Denis Pollney; Edward Seidel; Jonathan Thornburg

2004-11-30T23:59:59.000Z

397

The early-type close binary CV Velorum revisited  

E-Print Network [OSTI]

Our goal was to improve the fundamental parameters of the massive close double-lined eclipsing B2.5V+B2.5V binary CV Velorum.We gathered new high-resolution echelle spectroscopy on 13 almost consecutive nights covering essentially two orbits. We computed a simultaneous solution to all the available high-quality radial-velocity and light data with the latest version of the Wilson-Deviney code. We obtained the following values for the physical parameters: $M_1 = 6.066(74) M_\\odot$, $M_2 = 5.972(70) M_\\odot$, $R_1 = 4.126(24) R_\\odot$, $R_2 = 3.908(27) R_\\odot$, $\\log L_1 = 3.20(5) L_\\odot$, and $\\log L_2 = 3.14(5) L_\\odot$. The quoted errors contain a realistic estimate of systematic uncertainties mainly stemming from the effective temperature estimation. We derived abundances for both components and found them to be compatible with those of B stars in the solar neighbourhood. We discovered low-amplitude periodic line-profile variations with the orbital frequency for both components. Their interpretation requires new data with a longer time span. The primary rotates subsynchronously while the secondary's $v\\sin i$ and radius are compatible with synchronous rotation. Finally, we provide an update of the empirical mass-luminosity relation for main-sequence B stars which can be used for statistical predictions of masses or luminosities.

K. Yakut; C. Aerts; Th. Morel

2007-01-25T23:59:59.000Z

398

Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries  

E-Print Network [OSTI]

Helium that accretes onto a Carbon/Oxygen white dwarf in the double white dwarf AM Canum Venaticorum (AM CVn) binaries undergoes unstable thermonuclear flashes when the orbital period is in the 3.5-25 minute range. At the shortest orbital periods (and highest accretion rates, Mdot > 10^-7 Msol/yr), the flashes are weak and likely lead to the Helium equivalent of classical nova outbursts. However, as the orbit widens and Mdot drops, the mass required for the unstable ignition increases, leading to progressively more violent flashes up to a final flash with Helium shell mass ~ 0.02-0.1 Msol. The high pressures of these last flashes allow the burning to produce the radioactive elements 48Cr, 52Fe, and 56Ni that power a faint (M_V in the range of -15 to -18) and rapidly rising (few days) thermonuclear supernova. Current galactic AM CVn space densities imply one such explosion every 5,000-15,000 years in 10^11 Msol of old stars (~ 2-6% of the Type Ia rate in E/SO galaxies). These ".Ia" supernovae (one-tenth as bright for one-tenth the time as a Type Ia supernovae) are excellent targets for deep (e.g. V=24) searches with nightly cadences, potentially yielding an all-sky rate of 1,000 per year.

Lars Bildsten; Ken J. Shen; Nevin N. Weinberg; Gijs Nelemans

2007-05-06T23:59:59.000Z

399

Sudden loss of mass from a binary gravitating system  

Science Journals Connector (OSTI)

A recent discussion by Mitalas is generalized to treat sudden mass loss from a binary system in an originally e l l i p t i c a l orbit. Emphasis is placed on characterizing the orbits by angular momentum and energy and it is shown that none of the changes in the r e l a t i v e orbit depends on which object loses part of its mass; indeed in principle each could lose a different fraction. Time averages are introduced so that the orbital changes which depend on w h e r e in orbit the mass loss occurs can be suitably averaged over a statistical ensemble of initial systems. Although I present several results that appear to be new (such as a unique relation between the increase in the semimajor axis and the change in eccentricity independent of the orbital phase at the moment of mass loss) the main thrust is to choose and manipulate variables yielding the greatest economy of description and the greatest power of computation. (All calculations were easily done on a pocket calculator.) Graphs are presented showing the fraction of systems that on the average will be disrupted the mean orbital changes for the survivors (which can easily turn out to have s m a l l e r mean eccentricity than the progenitors) and the extreme limits for the change in eccentricity.

Peter D. Noerdlinger

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

The Evolution of the Multiplicity of Embedded Protostars. II. Binary Separation Distribution and Analysis  

Science Journals Connector (OSTI)

We present the Class I protostellar binary separation distribution based on the data tabulated in a companion paper. We verify the excess of Class I binary stars over solar-type main-sequence stars in the separation range from 500 AU to 4500 AU. Although our sources are in nearby star-forming regions distributed across the entire sky (including Orion), none of our objects are in a high stellar density environment. A log-normal function, used by previous authors to fit the main-sequence and T Tauri binary separation distributions, poorly fits our data, and we determine that a log-uniform function is a better fit. Our observations show that the binary separation distribution changes significantly during the Class I phase, and that the binary frequency at separations greater than 1000 AU declines steadily with respect to spectral index. Despite these changes, the binary frequency remains constant until the end of the Class I phase, when it drops sharply. We propose a scenario to account for the changes in the Class I binary separation distribution. This scenario postulates that a large number of companions with a separation greater than ~1000 AU were ejected during the Class 0 phase, but remain gravitationally bound due to the significant mass of the Class I envelope. As the envelope dissipates, these companions become unbound and the binary frequency at wide separations declines. Circumstellar and circumbinary disks are expected to play an important role in the orbital evolution at closer separations. This scenario predicts that a large number of Class 0 objects should be non-hierarchical multiple systems, and that many Class I young stellar objects (YSOs) with a widely separated companion should also have a very close companion. We also find that Class I protostars are not dynamically pristine, but have experienced dynamical evolution before they are visible as Class I objects. Our analysis shows that the Class I binary frequency and the binary separation distribution strongly depend on the star-forming environment.

Michael S. Connelley; Bo Reipurth; Alan T. Tokunaga

2008-01-01T23:59:59.000Z

402

SKA SA test telescope reveals binary star system South Africa's test telescope reveals secrets of a binary star system and proves the country is able to  

E-Print Network [OSTI]

SKA SA test telescope reveals binary star system South Africa's test telescope reveals secrets, has created huge research and job opportunities. South Africa's Karoo Array Telescope (KAT-7) has at the SKA South Africa. The 64-dish MeerKAT ­ which SKA South Africa director Bernie Fanaroff once described

Jarrett, Thomas H.

403

CBER-DETR Nevada Coincident and Leading Employment Did 2010 form the Bottom of the Great Recession: Will 2011 See recovery?  

E-Print Network [OSTI]

the seasonally adjusted data reported by the Bureau of Labor Statistics. The Nevada Coincident Employment IndexCBER-DETR Nevada Coincident and Leading Employment Indexes1 Did 2010 form the Bottom of the Great Recession: Will 2011 See recovery? The Nevada Coincident Employment Index measures the ups and downs

Ahmad, Sajjad

404

NOTES FOR THE WEEK OF OCT 9 TO OCT 16 (Reading assignments and Exercises to hand in are at the bottom of the page)  

E-Print Network [OSTI]

in are at the bottom of the page) Last week you learned how to collect good data. The main theme of the material and leaf diagrams. Boxplots provide information about center, spread and outliers, and can give some), their influence on the mean and median (p. 40), how to identify them (p. 43) and how to handle them (Section 2

Utts, Jessica

405

Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions  

Science Journals Connector (OSTI)

Abstract Improved energy efficiency is an issue of increasing importance in offshore oil and gas installations. The power on offshore installations is generated by gas turbines operating in a simple cycle. There is an obvious possibility for heat recovery for further power generation from the exhaust heat. However, the limited space and weight available makes the inclusion of bottoming cycles challenging. Due to its high working pressure and thereby compact components CO2 (carbon dioxide) could be a viable solution, combining compactness and efficiency. An in-house simulation tool is used to evaluate the performance of CO2 bottoming cycles at design and off-design conditions. Both a simple recuperated single stage cycle and a more advanced dual stage system are modelled. Results from simulations show a potential for 1011%-points increase in net plant efficiency at 100% gas turbine load. Also off-design simulations taking the variation in heat exchanger performance into account are performed showing that the bottoming cycle improves the off-design performance compared to the standard gas turbine solution. Even at 60% GT (gas turbine) load, the combined cycle with CO2 bottoming cycle can achieve up to 45% net plant efficiency, compared to 31% for only the gas turbine.

Harald Taxt Walnum; Petter Neks; Lars O. Nord; Trond Andresen

2013-01-01T23:59:59.000Z

406

GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 14091414, doi:10.1002/grl.50287, 2013 Southern Ocean bottom water characteristics in CMIP5 models  

E-Print Network [OSTI]

15 April 2013. [1] Southern Ocean deep water properties and formation processes in climate models Project Phase 5) climate models are compared with an observed climatology, focusing on bottom water, most models create deep water by open ocean deep convection, a process occurring rarely in reality

Matthews, Adrian

407

Predictive model-based for the critical submergence of horizontal intakes in open channel flows with different clearance bottoms using CART, ANN and linear regression approaches  

Science Journals Connector (OSTI)

This study presents the development of classification and regression tree (CART), artificial neural network (ANN) and linear regression approaches to predict the critical submergence in an open channel flow for different clearance bottoms. To use the ... Keywords: ANN, CART, Critical submergence

Mohammad Karim Ayoubloo; H. Md. Azamathulla; Ebrahim Jabbari; Morteza Zanganeh

2011-08-01T23:59:59.000Z

408

Energy Dissipation Through Quasi-static Tides in White Dwarf Binaries  

Science Journals Connector (OSTI)

We present a formalism to study tidal interactions in white dwarf binaries in the limiting case of quasi-static tides, in which the tidal forcing frequencies are small, compared to the inverse of the white dwarf's dynamical timescale. The formalism is valid for arbitrary orbital eccentricities and therefore applicable to white dwarf binaries in the Galactic disk as well as globular clusters. In the quasi-static limit, the total perturbation of the gravitational potential shows a phase shift with respect to the position of the companion, the magnitude of which is determined primarily by the efficiency of energy dissipation through convective damping. We determine rates of secular evolution of the orbital elements and white dwarf rotational angular velocity for a 0.3 M ? helium white dwarf in binaries with orbital frequencies in the Laser Interferometer Space Antenna (LISA) gravitational wave frequency band and companion masses ranging from 0.3 M ? to 105 M ?. The resulting tidal evolution timescales for the orbital semimajor axis are longer than a Hubble time, so that convective damping of quasi-static tides need not be considered in the construction of gravitational wave templates of white dwarf binaries in the LISA band. Spin-up of the white dwarf, on the other hand, can occur on timescales of less than 10Myr, provided that the white dwarf is initially rotating with a frequency much smaller than the orbital frequency. For semi-detached white dwarf binaries spin-up can occur on timescales of less than 1Myr. Nevertheless, the timescales remain longer than the orbital inspiral timescales due to gravitational radiation, so that the degree of asynchronism in these binaries increases. As a consequence, tidal forcing eventually occurs at forcing frequencies beyond the quasi-static tide approximation. For the shortest period binaries, energy dissipation is therefore expected to take place through dynamic tides and resonantly excited g-modes.

B. Willems; C. J. Deloye; V. Kalogera

2010-01-01T23:59:59.000Z

409

Energy Dissipation through Quasi-Static Tides in White Dwarf Binaries  

E-Print Network [OSTI]

We study tidal interactions in white dwarf binaries in the limiting case of quasi-static tides. The formalism is valid for arbitrary orbital eccentricities and therefore applicable to white dwarf binaries in the Galactic disk as well as globular clusters. In the quasi-static limit, the total perturbation of the gravitational potential shows a phase shift with respect to the position of the companion, the magnitude of which is determined primarily by the efficiency of energy dissipation through convective damping. We determine rates of secular evolution of the orbital elements and white dwarf rotational angular velocity for a 0.3 solar mass helium white dwarf in binaries with orbital frequencies in the LISA gravitational wave frequency band and companion masses ranging from 0.3 to 10^5 solar masses. The resulting tidal evolution time scales for the orbital semi-major axis are longer than a Hubble time, so that convective damping of quasi-static tides need not be considered in the construction of gravitational wave templates of white dwarf binaries in the LISA band. Spin-up of the white dwarf, on the other hand, can occur on time scales of less than 10Myr, provided that the white dwarf is initially rotating with a frequency much smaller than the orbital frequency. For semi-detached white dwarf binaries spin-up can occur on time scales of less than 1Myr. Nevertheless, the time scales remain longer than the orbital inspiral time scales due to gravitational radiation, so that the degree of asynchronism in these binaries increases. As a consequence, tidal forcing eventually occurs at forcing frequencies beyond the quasi-static tide approximation. For the shortest period binaries, energy dissipation is therefore expected to take place through dynamic tides and resonantly excited g-modes.

B. Willems; C. J. Deloye; V. Kalogera

2009-04-13T23:59:59.000Z

410

Formation of binary phase gratings in photopolymer-liquid crystal composites by a surface-controlled anisotropic phase separation  

SciTech Connect (OSTI)

We report on formation of binary phase gratings in photopolymer-liquid crystal (PLC) composites using a surface-controlled phase separation method. The binary nature of the PLC phase gratings is produced by employing a single step photo-ablation through an amplitude photomask which precisely controls the interfacial interactions between the LC and the photopolymer on the alignment layer. A subsequent illumination of the ultraviolet light onto the whole PLC promotes an anisotropic phase separation resulting in the formation of distinct binary patterns for the PLC structure. The electrically tunable diffraction properties of the binary phase gratings are presented.

Park, Jae-Hong; Khoo, Iam Choon; Yu, Chang-Jae; Jung, Min-Sik; Lee, Sin-Doo [216 Electrical Engineering East, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); School of Electrical Engineering no. 32, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600 (Korea, Republic of)

2005-01-10T23:59:59.000Z

411

Verification of universal surface scaling behavior in critical binary liquid mixtures with neutron and x-ray reflectometry.  

E-Print Network [OSTI]

??We have studied two critical binary liquid mixtures in the mixed phase regime with x-ray and neutron reflectometry to verify universal critical scaling at a (more)

Brown, Matthew D.

2007-01-01T23:59:59.000Z

412

Do X-ray Binary Spectral State Transition Luminosities Vary?  

E-Print Network [OSTI]

We tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and good mass estimates for the compact star. We show that the state transition luminosities are at about 1-4% of the Eddington rate, markedly smaller than those typically quoted in the literature, with a mean value of 2%. Only the black hole candidate GRO J~1655-40 and the neutron star systems Aql X-1 and 4U 1728-34 have measured state transition luminosities inconsistent with this value at the 1$\\sigma$ level. GRO J~1655-40, in particular, shows a state transition luminosity below the mean value for the other sources at the $4\\sigma$ level. This result, combined with the known inner disk inclination angle (the disk is nearly parallel to the line of sight) from GRO J~1655-40's relativistic jets suggest that the hard X-ray emitting region in GRO J~1655-40 can have a velocity of no more than about $\\beta=0.68$, with a most likely value of about $\\beta=0.52$, and a minimum speed of $\\beta=0.45$, assuming that the variations in state transition luminosities are solely due to relativistic beaming effects. The variance in the state transition luminosities suggests an emission region with a velocity of $\\sim0.2c$. The results are discussed in terms of different emission models for the low/hard state. We also discuss the implications for measuring the dimensionless viscosity parameter $\\alpha$. We also find that if its state transitions occur at typical luminosities, then GX 339-4 is likely to be at a distance of at least 7.6 kpc, much further than typically quoted estimates.

Thomas J. Maccarone

2003-08-02T23:59:59.000Z

413

Process sedimentology and reservoir quality of deep-marine bottom-current reworked sands (sandy contourites): An example from the Gulf of Mexico  

SciTech Connect (OSTI)

Deep-marine bottom-current reworked sands (sandy contourites) have been recognized in hydrocarbon-bearing sands of the Gulf of Mexico. A distinctive attribute of these sands is their traction bed forms, which occur in discrete units. Common sedimentary features of traction currents include cross-bedding, current ripples, horizontal lamination, sharp upper contacts, and inverse size grading. These sands also exhibit internal erosional surfaces and mud offshoots, indicating oscillating current energy conditions. THe Pliocene-Pleistocene sequence cored in the Ewing Bank Block 826 field in the Gulf of Mexico provides an example of sand distribution and reservoir quality of deep-marine bottom-current reworked sands. Presumably, the Loop Current, a strong wind-driven surface current in the Gulf of Mexico, impinged on the sea bottom, as it does today, and resulted in bottom-current reworked sands. A depositional model based on the integration of well (core and log) and three-dimensional seismic data suggests that the reworked sediment package may be thick and continuous, but individual sand layers within the package may be thin and discontinuous. This unconventional model, which depicts the distribution of bottom-current reworked sands in interchannel slope areas as a distinctly different facies from channel-levee facies, has the potential for general application to other slope plays outside the study area. In the Ewing Bank Block 826 field, the type I (L-1) reservoir with 80% sand exhibits higher permeability values (100-1800 md) than the type 2 (N-1) reservoir with 26% sand (50-800 md). The increased permeability in the type I sand has been attributed to high sand content, vigorous reworking, and microfractures. The clean, porous, and well-sorted type 1 sands with good communication between sand layers have produced at higher rates and recovery efficiencies than the type 2 sands with numerous interbedded mud layers. 50 refs., 22 figs., 1 tab.

Shanmugam, G. (Mobil Research and Development Corp., Dallas, TX (United States)); Spalding, T.D.; Rofheart, D.H. (Mobil New Business Development, Dallas, TX (United States))

1993-07-01T23:59:59.000Z

414

Simultaneous Modification of Bottom-Contact Electrode and Dielectric Surfaces for Organic Thin-Film Transistors Through Single-Component Spin-Cast Monolayers  

SciTech Connect (OSTI)

An efficient process is developed by spin-coating a single-component, self-assembled monolayer (SAM) to simultaneously modify the bottom-contact electrode and dielectric surfaces of organic thin-film transistors (OTFTs). This efficient interface modification is achieved using n-alkyl phosphonic acid based SAMs to prime silver bottom-contacts and hafnium oxide (HfO{sub 2}) dielectrics in low-voltage OTFTs. Surface characterization using near edge X-ray absorption fine structure (NEXAFS) spectroscopy, X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, atomic force microscopy (AFM), and spectroscopic ellipsometry suggest this process yields structurally well-defined phosphonate SAMs on both metal and oxide surfaces. Rational selection of the alkyl length of the SAM leads to greatly enhanced performance for both n-channel (C60) and p-channel (pentacene) based OTFTs. Specifically, SAMs of n-octylphos-phonic acid (OPA) provide both low-contact resistance at the bottom-contact electrodes and excellent interfacial properties for compact semiconductor grain growth with high carrier mobilities. OTFTs based on OPA modifi ed silver electrode/HfO{sub 2} dielectric bottom-contact structures can be operated using < 3V with low contact resistance (down to 700 Ohm-cm), low subthreshold swing (as low as 75 mV dec{sup -1}), high on/off current ratios of 107, and charge carrier mobilities as high as 4.6 and 0.8 cm{sup 2} V{sup -1} s{sup -1}, for C60 and pentacene, respectively. These results demonstrate that this is a simple and efficient process for improving the performance of bottom-contact OTFTs.

O Acton; M Dubey; t Weidner; K OMalley; T Kim; G Ting; D Hutchins; J Baio; T Lovejoy; et al.

2011-12-31T23:59:59.000Z

415

Forecasting aggregate demand: Analytical comparison of top-down and bottom-up approaches in a multivariate exponential smoothing framework  

Science Journals Connector (OSTI)

Abstract Forecasting aggregate demand represents a crucial aspect in all industrial sectors. In this paper, we provide the analytical prediction properties of top-down (TD) and bottom-up (BU) approaches when forecasting the aggregate demand using a multivariate exponential smoothing as demand planning framework. We extend and generalize the results achieved by Widiarta et al. (2009) by employing an unrestricted multivariate framework allowing for interdependency between its variables. Moreover, we establish the necessary and sufficient condition for the equality of mean squared errors (MSEs) of the two approaches. We show that the condition for the equality of \\{MSEs\\} holds even when the moving average parameters of the individual components are not identical. In addition, we show that the relative forecasting accuracy of TD and BU depends on the parametric structure of the underlying framework. Simulation results confirm our theoretical findings. Indeed, the ranking of TD and BU forecasts is led by the parametric structure of the underlying data generation process, regardless of possible misspecification issues.

Giacomo Sbrana; Andrea Silvestrini

2013-01-01T23:59:59.000Z

416

Conservative and dissipative force field for simulation of coarse-grained alkane molecules: A bottom-up approach  

SciTech Connect (OSTI)

We apply operational procedures available in the literature to the construction of coarse-grained conservative and friction forces for use in dissipative particle dynamics (DPD) simulations. The full procedure rely on a bottom-up approach: large molecular dynamics trajectories of n-pentane and n-decane modeled with an anisotropic united atom model serve as input for the force field generation. As a consequence, the coarse-grained model is expected to reproduce at least semi-quantitatively structural and dynamical properties of the underlying atomistic model. Two different coarse-graining levels are studied, corresponding to five and ten carbon atoms per DPD bead. The influence of the coarse-graining level on the generated force fields contributions, namely, the conservative and the friction part, is discussed. It is shown that the coarse-grained model of n-pentane correctly reproduces self-diffusion and viscosity coefficients of real n-pentane, while the fully coarse-grained model for n-decane at ambient temperature over-predicts diffusion by a factor of 2. However, when the n-pentane coarse-grained model is used as a building block for larger molecule (e.g., n-decane as a two blobs model), a much better agreement with experimental data is obtained, suggesting that the force field constructed is transferable to large macro-molecular systems.

Trment, Sbastien; Rousseau, Bernard, E-mail: bernard.rousseau@u-psud.fr [Laboratoire de Chimie-Physique, UMR 8000 CNRS, Universit Paris-Sud, Orsay (France)] [Laboratoire de Chimie-Physique, UMR 8000 CNRS, Universit Paris-Sud, Orsay (France); Schnell, Benot; Petitjean, Laurent; Couty, Marc [Manufacture Franaise des Pneumatiques MICHELIN, Centre de Ladoux, 23 place des Carmes, 63000 Clermont-Ferrand (France)] [Manufacture Franaise des Pneumatiques MICHELIN, Centre de Ladoux, 23 place des Carmes, 63000 Clermont-Ferrand (France)

2014-04-07T23:59:59.000Z

417

ON THE PULSATIONAL-ORBITAL-PERIOD RELATION OF ECLIPSING BINARIES WITH ?-SCT COMPONENTS  

SciTech Connect (OSTI)

We have deduced a theoretical relation between the pulsation and orbital-periods of pulsating stars in close binaries based on their Roche lobe filling. It appears to be of a simple linear form, with the slope as a function of the pulsation constant, the mass ratio, and the filling factor for an individual system. Testing the data of 69 known eclipsing binaries containing ?-Sct-type components yields an empirical slope of 0.020 0.006 for the P{sub pul}-P{sub orb} relation. We have further derived the upper limit of the P{sub pul}/P{sub orb} ratio for the ?-Sct stars in eclipsing binaries with a value of 0.09 0.02. This value could serve as a criterion to distinguish whether or not a pulsator in an eclipsing binary pulsates in the p-mode. Applying the deduced P{sub pul}-P{sub orb} relation, we have computed the dominant pulsation constants for 37 ?-Sct stars in eclipsing systems with definite photometric solutions. These ranged between 0.008 and 0.033 days with a mean value of about 0.014 days, indicating that ?-Sct stars in eclipsing binaries mostly pulsate in the fourth or fifth overtones.

Zhang, X. B.; Luo, C. Q. [Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); Fu, J. N. [Department of Astronomy, Beijing Normal University, Beijing 100875 (China)

2013-11-01T23:59:59.000Z

418

Photometry of four binary subdwarf B stars and the nature of their unseen companion stars  

E-Print Network [OSTI]

We present lightcurves of four binary subdwarf B stars, Ton 245, Feige 11, PG1432+159 and PG1017-086. We also present new spectroscopic data for PG1017-086 from which we derive its orbital period, P=0.073d, and the mass function, f_m = 0.0010 +/- 0.0002 solar masses. This is the shortest period for an sdB binary measured to-date. The values of P and f_m for the other sdB binaries have been published elsewhere. We are able to exclude the possibility that the unseen companion stars to Ton 245, Feige 11 and PG1432+159 are main-sequence stars or sub-giant stars from the absence of a sinusoidal signal which would be caused by the irradiation of such a companion star, i.e., they show no reflection effect. The unseen companion stars in these binaries are likely to be white dwarf stars. By contrast, the reflection effect in PG1017-086 is clearly seen. The lack of eclipses in this binary combined with other data suggests that the companion is a low mass M-dwarf or, perhaps, a brown dwarf.

P. F. L. Maxted; T. R. Marsh; U. Heber; L. Morales-Rueda; R. C. North; W. A. Lawson

2002-02-08T23:59:59.000Z

419

Heber Binary-Cycle Geothermal Demonstration Power Plant: Half-load testing, performance, and thermodynamics  

SciTech Connect (OSTI)

This report describes the project's activities during the period July 1986 through June 1987; and includes results of two annual outages and eight months of low power testing and operating. The Heber Binary-Cycle Geothermal Demonstration Power Plant is a 45 MWe electric power generating plant in the Imperial Valley of Southern California. The purpose of the Heber Binary Project is to demonstrate the capability of binary-cycle technology to economically utilize moderate-temperature (300/degree/F to 410/degree/F (150/degree/C to 210/degree/C)) geothermal resources for electric power production. The main objective of the project is to show performance, cost, and environmental acceptability of binary-cycle technology. Experience with demonstration plant and heat supply facilities is described. Details of equipment problems are included. Heat supply shortfall prevented the planned ascent to full power, but binary-cycle experience was favorable at power levels up to 50% of design. 68 refs., 80 figs., 34 tabs.

Berning, J.L.; Fishbaugher, J.R.

1988-08-01T23:59:59.000Z

420

Wind mass transfer in S-type symbiotic binaries I. Focusing by the wind compression model  

E-Print Network [OSTI]

Context: Luminosities of hot components in symbiotic binaries require accretion rates that are higher than those that can be achieved via a standard Bondi-Hoyle accretion. This implies that the wind mass transfer in symbiotic binaries has to be more efficient. Aims: We suggest that the accretion rate onto the white dwarfs (WDs) in S-type symbiotic binaries can be enhanced sufficiently by focusing the wind from their slowly rotating normal giants towards the binary orbital plane. Methods: We applied the wind compression model to the stellar wind of slowly rotating red giants in S-type symbiotic binaries. Results: Our analysis reveals that for typical terminal velocities of the giant wind, 20 to 50 km/s, and measured rotational velocities between 6 and 10 km/s, the densities of the compressed wind at a typical distance of the accretor from its donor correspond to the mass-loss rate, which can be a factor of $\\sim$10 higher than for the spherically symmetric wind. This allows the WD to accrete at rates of $10^{-...

Skopal, Augustin

2014-01-01T23:59:59.000Z

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421

Testing Low-Mass Stellar Models: Three New Detached Eclipsing Binaries below 0.75 Msun  

E-Print Network [OSTI]

Full tests to stellar models below 1 Msun have been hindered until now by the scarce number of precise measurements of the stars' most fundamental parameters: their masses and radii. With the current observational techniques, the required precision to distinguish between different models (errors < 2-3 %) can only be achieved using detached eclipsing binaries where 1) both stars are similar in mass, i.e. q = M1/M2 ~ 1.0, and 2) each star is a main sequence object below 1 Msun. Until 2003 only three such binaries had been found and analyzed in detail. Two new systems were published in 2005 (Creevey et al.; Lopez-Morales & Ribas), almost doubling the previous number of data points. Here we present preliminary results for 3 new low-mass detached eclipsing binaries. These are the first studied systems from our sample of over 41 new binaries (Shaw & Lopez-Morales, this proceedings). We also provide an updated comparison between the Mass-Radius and the Mass-Teff relations predicted by the models and the observational data from detached eclipsing binaries.

Mercedes Lopez-Morales; J. Scott Shaw

2006-03-28T23:59:59.000Z

422

Close binary stars in the solar-age Galactic open cluster M67  

E-Print Network [OSTI]

We present multi-colour time-series CCD photometry of the solar-age galactic open cluster M67 (NGC 2682). About 3600 frames spread over 28 nights were obtained with the 1.5 m Russian-Turkish and 1.2 m Mercator telescopes. High-precision observations of the close binary stars AH Cnc, EV Cnc, ES Cnc, the $\\delta$ Scuti type systems EX Cnc and EW Cnc, and some long-period variables belonging to M67 are presented. Three full multi-colour light curves of the overcontact binary AH Cnc were obtained during three observing seasons. Likewise we gathered three light curves of EV Cnc, an EB-type binary, and two light curves of ES Cnc, a blue straggler binary. Parts of the light change of long-term variables S1024, S1040, S1045, S1063, S1242, and S1264 are obtained. Period variation analysis of AH Cnc, EV Cnc, and ES Cnc were done using all times of mid-eclipse available in the literature and those obtained in this study. In addition, we analyzed multi-colour light curves of the close binaries and also determined new fre...

Yakut, K; Kalomeni, B; Van Winckel, H; Waelkens, C; De Cat, P; Bauwens, E; Vuckovic, M; Saesen, S; Guillou, L Le; Parmaksizoglu, M; Uluc, K; Khamitov, I; Raskin, G; Aerts, C

2009-01-01T23:59:59.000Z

423

Preliminary reliability and availability analysis of the Heber geothermal binary demonstration plant. Final report  

SciTech Connect (OSTI)

An assessment is presented of the reliability and availability of the Heber Geothermal Binary Demonstration Plant on the basis of preliminary design information. It also identifies and ranks components of the plant in order of their criticality to system operation and their contribution to system unavailability. The sensitivity of the various components to uncertainties of data and the potential for reliability growth are also examined. The assessment results were obtained through the adaptation and application of an existing reliability and availability methodology to the Heber plant design. These preliminary assessments were made to assist (1) in evaluating design alternatives for the plant and (2) in demonstrating that the closed-loop, multiple-fluid, binary cycle geothermal concept is competitive with the more conventional flashed steam cycle technology. The Heber Geothermal Binary Demonstration Plant Project is a cooperative effort directed toward accelerating geothermal development for power generation and establishing the binary cycle technology as a proven alternative to the flashed steam cycle for moderate temperature hydrothermal resources. The binary power plant would have a capacity of 45 MW/sub e/ net and would derive its energy from the low salinity (14,000 ppM), moderate temperature (360/sup 0/F, 182/sup 0/C) fluid from the Heber reservoir in southern California.

Himpler, H.; White, J.; Witt, J.

1981-10-01T23:59:59.000Z

424

ANALYSIS OF THE MOTION OF AN EXTRASOLAR PLANET IN A BINARY SYSTEM  

SciTech Connect (OSTI)

More than 10% of extra-solar planets (EPs) orbit in a binary or multiple stellar system. We investigated the motion of planets revolving in binary systems in the case of the three-body problem. We carried out an analysis of the motion of an EP revolving in a binary system with the following conditions: (1) a planet in a binary system revolves around one of the components (parent star); (2) the distance between the star's components is greater than that between the parent star and the orbiting planet (ratio of the semi-major axes is a small parameter); and (3) the mass of the planet is smaller than the mass of the stars, but is not negligible. The Hamiltonian of the system without short periodic terms was used. We expanded the Hamiltonian in terms of the Legendre polynomial and truncated after the second-order term, depending on only one angular variable. In this case, the solution of the system was obtained and the qualitative analysis of the motion was produced. We have applied this theory to real EPs and compared to the numerical integration. Analyses of the possible regions of motion are presented. It is shown that stable and unstable motions of EPs are possible. We applied our calculations to two binary systems hosting an EP and calculated the possible values for their unknown orbital elements.

Plvalov, Eva [Astronomical Institute, Slovak Academy of Science, Bratislava (Slovakia); Solovaya, Nina A., E-mail: plavala@slovanet.sk, E-mail: solov@sai.msu.ru [Sternberg State Astronomical Institute, Lomonosov Moscow State University, Moscow (Russian Federation)

2013-11-01T23:59:59.000Z

425

Domain walls and bubble-droplets in immiscible binary Bose gases  

E-Print Network [OSTI]

The existence and stability of domain walls (DWs) and bubble-droplet (BD) states in binary mixtures of quasi-one-dimensional ultracold Bose gases with inter- and intra-species repulsive interactions is considered. Previously, DWs were studied by means of coupled systems of Gross-Pitaevskii equations (GPEs) with cubic terms, which model immiscible binary Bose-Einstein condensates (BECs). We address immiscible BECs with two- and three-body repulsive interactions, as well as binary Tonks--Girardeau (TG) gases, using systems of GPEs with cubic and quintic nonlinearities for the binary BEC, and coupled nonlinear Schr\\"{o}dinger equations with quintic terms for the TG gases. Exact DW\\ solutions are found for the symmetric BEC mixture, with equal intra-species scattering lengths. Stable asymmetric DWs in the BEC mixtures with dissimilar interactions in the two components, as well as of symmetric and asymmetric DWs in the binary TG gas, are found by means of numerical and approximate analytical methods. In the BEC sy...

Filatrella, G; Salerno, M

2014-01-01T23:59:59.000Z

426

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds  

E-Print Network [OSTI]

of heating temperature in the Cu-Sn system, along with simulated patterns (based on literature references) for (bottom) Cu 6 Sn 5 and (top) Cu 41 Sn 11 . At 125 C, the pattern matches that of Cu 6 Sn 5 . Upon further heating in the presence of tin... of heating temperature in the Co-Sn system, along with simulated patterns (based on literature references) for (bottom) Co 3 Sn 2 and (top) CoSn. Between 190 and 200 C, the pattern matches closely with that expected for Co 3 Sn 2 . Upon further heating...

Cable, Robert E.

2008-10-10T23:59:59.000Z

427

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds  

E-Print Network [OSTI]

of heating temperature in the Cu-Sn system, along with simulated patterns (based on literature references) for (bottom) Cu 6 Sn 5 and (top) Cu 41 Sn 11 . At 125 ?C, the pattern matches that of Cu 6 Sn 5 . Upon further heating in the presence of tin... of heating temperature in the Co-Sn system, along with simulated patterns (based on literature references) for (bottom) Co 3 Sn 2 and (top) CoSn. Between 190 and 200 ?C, the pattern matches closely with that expected for Co 3 Sn 2 . Upon further heating...

Cable, Robert E.

2009-05-15T23:59:59.000Z

428

Binaries discovered by the SPY project. IV. Five single-lined DA double white dwarfs  

E-Print Network [OSTI]

We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE0320-1917, HE1511-0448, WD0326-273, WD1013-010 and WD1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD0326-273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.

G. Nelemans; R. Napiwotzki; C. Karl; T. R. Marsh; B. Voss; G. Roelofs; R. G. Izzard; M. Montgomery; T. Reerink; N. Christlieb; D. Reimers

2005-06-10T23:59:59.000Z

429

Gravitational Waveforms for Precessing, Quasicircular Compact Binaries with Multiple Scale Analysis: Small Spin Expansion  

E-Print Network [OSTI]

We obtain analytical gravitational waveforms in the frequency-domain for precessing, quasi-circular compact binaries with small spins, applicable, for example, to binary neutron star inspirals. We begin by calculating an analytic solution to the precession equations, obtained by expanding in the dimensionless spin parameters and using multiple-scale analysis to separate timescales. We proceed by analytically computing the Fourier transform of time-domain waveform through the stationary phase approximation. We show that the latter is valid for systems with small spins. Finally, we show that these waveforms have a high overlap with numerical waveforms obtained through direct integration of the precession equations and discrete Fourier transformations. The resulting, analytic waveform family is ideal for detection and parameter estimation of gravitational waves emitted by inspiraling binary neutron stars with ground-based detectors.

Katerina Chatziioannou; Antoine Klein; Nicolas Yunes; Neil Cornish

2013-07-16T23:59:59.000Z

430

Wide Binary Effects on Asymmetries in Asymptotic Giant Branch Circumstellar Envelopes  

E-Print Network [OSTI]

Observations of increasingly higher spatial resolution reveal the existence of asymmetries in the circumstellar envelopes of a small fraction of asymptotic giant branch (AGB) stars. Although there is no general consensus for their origin, a binary companion star may be responsible. Within this framework, we investigate the gravitational effects associated with a sufficiently wide binary system, where Roche lobe overflow is unimportant, on the outflowing envelopes of AGB stars using three dimensional hydrodynamic simulations. The effects due to individual binary components are separately studied, enabling investigation of the stellar and circumstellar characteristics in detail. The reflex motion of the AGB star alters the wind velocity distribution, thereby, determining the overall shape of the outflowing envelope. On the other hand, the interaction of the companion with the envelope produces a gravitational wake, which exhibits a vertically thinner shape. The two patterns overlap and form clumpy structures. T...

Kim, Hyosun

2012-01-01T23:59:59.000Z

431

A search for binary candidates among the fundamental mode RR Lyrae stars observed by Kepler  

E-Print Network [OSTI]

Although roughly half of all stars are considered to be part of binary or multiple systems, there are only two confirmed cases of RR Lyrae pulsators with companions. One of them is TU Uma (Wade et al 1999) - a classical RR Lyrae star in a very eccentric orbit - and the other is OGLE-BLG-RRLYR-02792 (Pietrzynski et al 2012). Considering the wealth of well-studied RR Lyrae stars, this number is astoundingly low. Having more RR Lyrae stars in binary systems at hand would be extremely valuable to get independent measurements of the masses. The data from the Kepler mission with their unprecedented precision and the long time span of about four years offer a unique possibility to systematically search for the signatures of binarity in RR Lyrae stars. Using the pulsation as a clock, we studied the variations in the timing of maximum light to hunt for possible binary systems in the sample.

Guggenberger, Elisabeth

2014-01-01T23:59:59.000Z

432

The colliding-wind binary WR140: the particle acceleration laboratory  

E-Print Network [OSTI]

WR+O star binary systems exhibit synchrotron emission arising from relativistic electrons accelerated where the wind of the WR star and that of its massive binary companion collide - the wind-collision region (WCR). These ``colliding-wind'' binaries (CWB), provide an excellent laboratory for the study of particle acceleration, with the same physical processes as observed in SNRs, but at much higher mass, photon and magnetic energy densities. WR140 is the best studied CWB, and high resolution radio observations permit a determination of several system parameters, particularly orbit inclination and distance, that are essential constraints for newly developed models of CWBs. We show a model fit to the radio data at orbital phase 0.9, and show how these models may be used to predict the high energy emission from WR140.

S. M. Dougherty; J. M. Pittard

2005-10-18T23:59:59.000Z

433

Shrinking binary and planetary orbits by Kozai cycles with tidal friction  

E-Print Network [OSTI]

At least two arguments suggest that the orbits of a large fraction of binary stars and extrasolar planets shrank by 1-2 orders of magnitude after formation: (i) the physical radius of a star shrinks by a large factor from birth to the main sequence, yet many main-sequence stars have companions orbiting only a few stellar radii away, and (ii) in current theories of planet formation, the region within ~0.1 AU of a protostar is too hot and rarefied for a Jupiter-mass planet to form, yet many "hot Jupiters" are observed at such distances. We investigate orbital shrinkage by the combined effects of secular perturbations from a distant companion star (Kozai oscillations) and tidal friction. We integrate the relevant equations of motion to predict the distribution of orbital elements produced by this process. Binary stars with orbital periods of 0.1 to 10 days, with a median of ~2 d, are produced from binaries with much longer periods (10 d to 10^5 d), consistent with observations indicating that most or all short-period binaries have distant companions (tertiaries). We also make two new testable predictions: (1) For periods between 3 and 10 d, the distribution of the mutual inclination between the inner binary and the tertiary orbit should peak strongly near 40 deg and 140 deg. (2) Extrasolar planets whose host stars have a distant binary companion may also undergo this process, in which case the orbit of the resulting hot Jupiter will typically be misaligned with the equator of its host star.

Daniel Fabrycky; Scott Tremaine

2007-05-30T23:59:59.000Z

434

Search for gravitational waves from low mass compact binary coalescence in LIGOs sixth science run and Virgos science runs 2 and 3  

E-Print Network [OSTI]

We report on a search for gravitational waves from coalescing compact binaries using LIGO and Virgo observations between July 7, 2009, and October 20, 2010. We searched for signals from binaries with total mass between 2 ...

Barsotti, Lisa

435

THE BANANA PROJECT. IV. TWO ALIGNED STELLAR ROTATION AXES IN THE YOUNG ECCENTRIC BINARY SYSTEM EP CRUCIS: PRIMORDIAL ORIENTATION AND TIDAL ALIGNMENT  

E-Print Network [OSTI]

With observations of the EP Cru system, we continue our series of measurements of spin-orbit angles in eclipsing binary star systems, the BANANA project (Binaries Are Not Always Neatly Aligned). We find a close alignment ...

Albrecht, Simon

436

Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper and lower critical consolute points  

E-Print Network [OSTI]

has been measured for a two-component critical liquid system, butyl cellosolve-water, in the region to report measurements of the shear viscosity of critical binary mixture butyl cello- solve (2-n353 Shear viscosity measurements in the binary mixture butyl cellosolve-water near its upper

Boyer, Edmond

437

Effects of a Supermassive Black Hole Binary on a Nuclear Gas Disk  

E-Print Network [OSTI]

We study influence of a galactic central supermassive black hole (SMBH) binary on gas dynamics and star formation activity in a nuclear gas disk by making three-dimensional Tree+SPH simulations. Due to orbital motions of SMBHs, there are various resonances between gas motion and the SMBH binary motion. We have shown that these resonances create some characteristic structures of gas in the nuclear gas disk, for examples, gas elongated or filament structures, formation of gaseous spiral arms, and small gas disks around SMBHs. In these gaseous dense regions, active star formations are induced. As the result, many star burst regions are formed in the nuclear region.

Hidenori Matsui; Asao Habe; Takayuki R. Saitoh

2006-06-07T23:59:59.000Z

438

Binary and ternary gas mixtures for use in glow discharge closing switches  

DOE Patents [OSTI]

Highly efficient binary and ternary gas mixtures for use in diffuse glow discharge closing switches are disclosed. The binary mixtures are combinations of helium or neon and selected perfluorides. The ternary mixtures are combinations of helium, neon, or argon, a selected perfluoride, and a small amount of gas that exhibits enhanced ionization characteristics. These mixtures are shown to be the optimum choices for use in diffuse glow discharge closing switches by virtue if the combines physio-electric properties of the mixture components. 9 figs.

Hunter, S.R.; Christophorou, L.G.

1988-04-27T23:59:59.000Z

439

Assessment of Historic Trend in Mobility and Energy Use in India Transportation Sector Using Bottom-up Approach  

SciTech Connect (OSTI)

Transportation mobility in India has increased significantly in the past decades. From 1970 to 2000, motorized mobility (passenger-km) has risen by 888%, compared with an 88% population growth (Singh,2006). This contributed to many energy and environmental issues, and an energy strategy incorporates efficiency improvement and other measures needs to be designed. Unfortunately, existing energy data do not provide information on driving forces behind energy use and sometime show large inconsistencies. Many previous studies address only a single transportation mode such as passenger road travel; did not include comprehensive data collection or analysis has yet been done, or lack detail on energy demand by each mode and fuel mix. The current study will fill a considerable gap in current efforts, develop a data base on all transport modes including passenger air and water, and freight in order to facilitate the development of energy scenarios and assess significance of technology potential in a global climate change model. An extensive literature review and data collection has been done to establish the database with breakdown of mobility, intensity, distance, and fuel mix of all transportation modes. Energy consumption was estimated and compared with aggregated transport consumption reported in IEA India transportation energy data. Different scenarios were estimated based on different assumptions on freight road mobility. Based on the bottom-up analysis, we estimated that the energy consumption from 1990 to 2000 increased at an annual growth rate of 7% for the mid-range road freight growth case and 12% for the high road freight growth case corresponding to the scenarios in mobility, while the IEA data only shows a 1.7% growth rate in those years.

Zhou, Nan; McNeil, Michael A.

2009-05-01T23:59:59.000Z

440

Leaching of elements from bottom ash, economizer fly ash, and fly ash from two coal-fired power plants  

Science Journals Connector (OSTI)

To assess how elements leach from several types of coal combustion products (CCPs) and to better understand possible risks from CCP use or disposal, coal ashes were sampled from two bituminous-coal-fired power plants. One plant located in Ohio burns high-sulfur (about 3.9%) Upper Pennsylvanian Pittsburgh coal from the Monongahela Group of the Central Appalachian Basin; the other in New Mexico burns low-sulfur (about 0.76%) Upper Cretaceous Fruitland Formation coal from the San Juan Basin, Colorado Plateau. The sampled \\{CCPs\\} from the Ohio plant were bottom ash (BA), economizer fly ash (EFA), and fly ash (FA); the sampled \\{CCPs\\} from the New Mexico plant were BA, mixed FA/EFA, FA, and cyclone-separated coarse and fine fractions of a FA/EFA and FA blend. Subsamples of each ash were leached using the long-term leaching (60-day duration) component of the synthetic groundwater leaching procedure (SGLP) or the toxicity characteristic leaching procedure (TCLP, 18-hour duration). These ashes were all alkaline. Leachate concentrations and leachabilities of the elements from the \\{CCPs\\} were similar between corresponding CCP types (BA, EFA, and FA) from each plant. The leachabilities of most elements were lowest in BA (least leachable) and increased from EFA to FA (most leachable). Ca and Sr were leached more from EFA than from either BA or FA. Leachability of most elements also increased as FA particle size decreased, possibly due in part to increasing specific surface areas. Several oxyanion-forming elements (As, Mo, Se, U, and V) leached more under SGLP than under TCLP; the opposite was true for most other elements analyzed.

Kevin B. Jones; Leslie F. Ruppert; Sharon M. Swanson

2012-01-01T23:59:59.000Z

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441

T-561: IBM and Oracle Java Binary Floating-Point Number Conversion Denial  

Broader source: Energy.gov (indexed) [DOE]

61: IBM and Oracle Java Binary Floating-Point Number Conversion 61: IBM and Oracle Java Binary Floating-Point Number Conversion Denial of Service Vulnerability T-561: IBM and Oracle Java Binary Floating-Point Number Conversion Denial of Service Vulnerability February 21, 2011 - 7:00am Addthis PROBLEM: IBM and Oracle Java Binary Floating-Point Number Conversion Denial of Service Vulnerability. PLATFORM: The following Java products are affected: Java SE: Oracle JDK and JRE 6 Update 23 and prior for Windows, Solaris, and Linux Oracle JDK 5.0 Update 27 and prior for Solaris 9 Oracle SDK 1.4.2_29 and prior for Solaris 8 IBM JDK 6 Update SR9 and prior IBM JDK 5 Update SR12-FP3 and prior IBM JDK 1.4.2 Update SR13-FP8 and prior Java for Business: Oracle JDK and JRE 6 Update 23 and prior for Windows, Solaris, and Linux Oracle JDK and JRE 5.0 Update 27 and prior for Windows, Solaris, and Linux

442

FINDING THE GLOBAL MINIMUM FOR BINARY IMAGE RESTORATION Tony F. Chan  

E-Print Network [OSTI]

- est. In this paper we define the restored image as the global min- imizer of the total-variation (TVFINDING THE GLOBAL MINIMUM FOR BINARY IMAGE RESTORATION Tony F. Chan , Selim Esedo¯glu and Mila and there are no general methods to calculate the global minimum, while local minimziers are very often of limited inter

Esedoglu, Selim

443

Detached white-dwarf close-binary stars -- CV's extended family  

E-Print Network [OSTI]

I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems. While small compared to the number of periods known for CVs (>300), I argue that each variety of detached system has a space density an order of magnitude higher that of CVs. While theory matches the observed distribution of orbital periods of the white dwarf/white dwarf binaries, it predicts white dwarfs of much lower mass than observed. Amongst both types of binary are clear examples of helium core white dwarfs, as opposed to the usual CO composition; similar systems must exist amongst the CVs. White dwarf/M dwarf binaries suffer from selection effects which diminish the numbers seen at long and short periods. They are useful for the study of irradiation; I discuss evidence to suggest that Balmer emission is broadened by optical depth effects to an extent which limits its usefulness for imaging the secondary stars in CVs.

T. R. Marsh

1999-06-07T23:59:59.000Z

444

First all-sky search for continuous gravitational waves from unknown sources in binary systems  

E-Print Network [OSTI]

We present the first results of an all-sky search for continuous gravitational waves from unknown spinning neutron stars in binary systems using LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect algorithm, the search was carried out on data from the sixth LIGO Science Run and the second and third Virgo Science Runs. The search covers a range of frequencies from 20 Hz to 520 Hz, a range of orbital periods from 2 to ~2,254 h and a frequency- and period-dependent range of frequency modulation depths from 0.277 to 100 mHz. This corresponds to a range of projected semi-major axes of the orbit from ~0.6e-3 ls to ~6,500 ls assuming the orbit of the binary is circular. While no plausible candidate gravitational wave events survive the pipeline, upper limits are set on the analyzed data. The most sensitive 95% confidence upper limit obtained on gravitational wave strain is 2.3e-24 at 217 Hz, assuming the source waves are circularly polarized. Although this search has been optimized for circular binary orbits, the upper limits obtained remain valid for orbital eccentricities as large as 0.9. In addition, upper limits are placed on continuous gravitational wave emission from the low-mass x-ray binary Scorpius X-1 between 20 Hz and 57.25 Hz.

The LIGO Scientific Collaboration; the Virgo Collaboration; J. Aasi; B. P. Abbott; R. Abbott; T. Abbott; M. R. Abernathy; T. Accadia; F. Acernese; K. Ackley; C. Adams; T. Adams; P. Addesso; R. X. Adhikari; C. Affeldt; M. Agathos; N. Aggarwal; O. D. Aguiar; A. Ain; P. Ajith; A. Alemic; B. Allen; A. Allocca; D. Amariutei; M. Andersen; R. Anderson; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; C. Arceneaux; J. Areeda; S. M. Aston; P. Astone; P. Aufmuth; C. Aulbert; L. Austin; B. E. Aylott; S. Babak; P. T. Baker; G. Ballardin; S. W. Ballmer; J. C. Barayoga; M. Barbet; B. C. Barish; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; A. Basti; J. C. Batch; J. Bauchrowitz; Th. S. Bauer; B. Behnke; M. Bejger; M. G. Beker; C. Belczynski; A. S. Bell; C. Bell; G. Bergmann; D. Bersanetti; A. Bertolini; J. Betzwieser; P. T. Beyersdorf; I. A. Bilenko; G. Billingsley; J. Birch; S. Biscans; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; S. Bloemen; M. Blom; O. Bock; T. P. Bodiya; M. Boer; G. Bogaert; C. Bogan; C. Bond; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; Sukanta Bose; L. Bosi; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; A. F. Brooks; D. A. Brown; D. D. Brown; F. Brckner; S. Buchman; T. Bulik; H. J. Bulten; A. Buonanno; R. Burman; D. Buskulic; C. Buy; L. Cadonati; G. Cagnoli; J. Caldern Bustillo; E. Calloni; J. B. Camp; P. Campsie; K. C. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; A. Castiglia; S. Caudill; M. Cavagli; F. Cavalier; R. Cavalieri; C. Celerier; G. Cella; C. Cepeda; E. Cesarini; R. Chakraborty; T. Chalermsongsak; S. J. Chamberlin; S. Chao; P. Charlton; E. Chassande-Mottin; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; Q. Chu; S. S. Y. Chua; S. Chung; G. Ciani; F. Clara; J. A. Clark; F. Cleva; E. Coccia; P. -F. Cohadon; A. Colla; C. Collette; M. Colombini; L. Cominsky; M. Constancio Jr.; A. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corpuz; A. Corsi; C. A. Costa; M. W. Coughlin; S. Coughlin; J. -P. Coulon; S. Countryman; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; R. Coyne; K. Craig; J. D. E. Creighton; T. D. Creighton; S. G. Crowder; A. Cumming; L. Cunningham; E. Cuoco; K. Dahl; T. Dal Canton; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; H. Daveloza; M. Davier; G. S. Davies; E. J. Daw; R. Day; T. Dayanga; G. Debreczeni; J. Degallaix; S. Delglise; W. Del Pozzo; T. Denker; T. Dent; H. Dereli; V. Dergachev; R. De Rosa; R. T. DeRosa; R. DeSalvo; S. Dhurandhar; M. Daz; L. Di Fiore; A. Di Lieto; I. Di Palma; A. Di Virgilio; A. Donath; F. Donovan; K. L. Dooley; S. Doravari; S. Dossa; R. Douglas; T. P. Downes; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; S. Dwyer; T. Eberle; T. Edo; M. Edwards; A. Effler; H. Eggenstein; P. Ehrens; J. Eichholz; S. S. Eikenberry; G. Endr?czi; R. Essick; T. Etzel; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; Q. Fang; S. Farinon; B. Farr; W. M. Farr; M. Favata; H. Fehrmann; M. M. Fejer; D. Feldbaum; F. Feroz; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. P. Fisher; R. Flaminio; J. -D. Fournier; S. Franco; S. Frasca; F. Frasconi; M. Frede; Z. Frei; A. Freise; R. Frey; T. T. Fricke; P. Fritschel; V. V. Frolov; P. Fulda; M. Fyffe; J. Gair; L. Gammaitoni; S. Gaonkar; F. Garufi; N. Gehrels; G. Gemme; E. Genin; A. Gennai; S. Ghosh; J. A. Giaime; K. D. Giardina; A. Giazotto; C. Gill; J. Gleason; E. Goetz; R. Goetz; L. Gondan; G. Gonzlez; N. Gordon; M. L. Gorodetsky; S. Gossan; S. Goler; R. Gouaty; C. Grf; P. B. Graff; M. Granata; A. Grant; S. Gras; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; P. Groot; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; K. Gushwa; E. K. Gustafson; R. Gustafson; D. Hammer; G. Hammond; M. Hanke; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. Hart; M. T. Hartman; C. -J. Haster; K. Haughian; A. Heidmann; M. Heintze; H. Heitmann; P. Hello; G. Hemming; M. Hendry; I. S. Heng; A. W. Heptonstall; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; K. Holt; S. Hooper; P. Hopkins; D. J. Hosken; J. Hough; E. J. Howell; Y. Hu; E. Huerta; B. Hughey; S. Husa; S. H. Huttner; M. Huynh; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; B. R. Iyer; K. Izumi; M. Jacobson; E. James; H. Jang; P. Jaranowski; Y. Ji; F. Jimnez-Forteza; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; Haris K; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; J. Karlen; M. Kasprzack; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kawabe; F. Kawazoe; F. Kflian; G. M. Keiser; D. Keitel; D. B. Kelley; W. Kells; A. Khalaidovski

2014-05-30T23:59:59.000Z

445

A Comparative Assessment of Malware Classification using Binary Texture Analysis and Dynamic Analysis  

E-Print Network [OSTI]

.ucsb.edu Vinod Yegneswaran SRI International Menlo Park, USA vinod@csl.sri.com Phillip Porras SRI International features. Further, feature extraction requires a time investment per binary that does not scale well and efficient complement to dynamic analysis. Categories and Subject Descriptors D.4.6 [Security and Protection

California at Santa Barbara, University of

446

Short gamma-ray bursts from binary neutron star mergers in globular clusters  

E-Print Network [OSTI]

ARTICLES Short gamma-ray bursts from binary neutron star mergers in globular clusters JONATHAN@cfa.harvard.edu Published online: 29 January 2006; doi:10.1038/nphys214 Observations by the Swift gamma-ray-burst (GRB, the so-called `long' GRBs (>2-200 s) were located by coded aperture imaging of their hard X-ray emission

Loss, Daniel

447

Black-Box Identification for PLC based MPC of a Binary Distillation Column  

E-Print Network [OSTI]

Black-Box Identification for PLC based MPC of a Binary Distillation Column B. Huyck ,, F. Logist J is to upgrade the control system with a linear MPC running on a PLC. However, before a model based controller can be used on a PLC, an accurate (but simple) process model has to be constructed. Hence, the aim

448

Towards new binary compounds: Synthesis of amorphous phosphorus carbide by pulsed laser deposition  

E-Print Network [OSTI]

Towards new binary compounds: Synthesis of amorphous phosphorus carbide by pulsed laser deposition Available online 28 November 2012 Keywords: Phosphorus carbide Pulsed laser deposition X-ray photoelectron possible crystal structures of the as yet unknown phosphorus carbide as a function of composition

Bristol, University of

449

The evolutionary state of short-period magnetic white dwarf binaries  

Science Journals Connector (OSTI)

......al. 2009). Using a grid of magnetic white dwarf...both systems, using a grid stepsize of 3000 K and...Clearly these binaries will benefit greatly from further observations...We used their updated grid of DA white dwarf cooling...monitoring light curve from the SMARTS telescope was presented......

E. Breedt; B. T. Gnsicke; J. Girven; A. J. Drake; C. M. Copperwheat; S. G. Parsons; T. R. Marsh

2012-06-21T23:59:59.000Z

450

Henry's law, surface tension, and surface adsorption in dilute binary mixtures  

E-Print Network [OSTI]

Henry's law, surface tension, and surface adsorption in dilute binary mixtures Akira Onukia. The solute partitioning between gas and liquid Henry's law and the surface tension change are discussed fraction X and the temperature-derivative / T cx,p of the surface tension at fixed pressure p

451

Filling the disk hollow following binary black hole merger: The transient accretion afterglow  

SciTech Connect (OSTI)

Tidal torques from a binary black hole empty out the central regions in any circumbinary gaseous accretion disk. The balance between tidal torques and viscosity maintain the inner edge of the disk at a radius r{approx}1.5a-2a, where a is the binary semimajor axis. Eventually, the inspiraling binary decouples from the disk and merges, leaving behind a central hollow (''donut hole'') in the disk orbiting the remnant black hole. We present a simple, time-dependent, Newtonian calculation that follows the secular (viscous) evolution of the disk as it fills up the hollow down to the black hole innermost stable circular orbit and then relaxes to stationary equilibrium. We use our model to calculate the electromagnetic radiation (''afterglow'') spectrum emitted during this transient accretion epoch. Observing the temporal increase in the total electromagnetic flux and the hardening of the spectrum as the donut hole fills may help confirm a binary black hole merger detected by a gravitational wave interferometer. We show how the very existence of the initial hollow can lead to super-Eddington accretion during this secular phase if the rate is not very far below Eddington prior to decoupling. Our model, though highly idealized, may be useful in establishing some of the key parameters, thermal emission features and scalings that characterize this transient. It can serve as a guide in the design and calibration of future radiation-magnetohydrodynamic simulations in general relativity.

Shapiro, Stuart L. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2010-01-15T23:59:59.000Z

452

Stellar loci II. a model-free estimate of the binary fraction for field FGK stars  

E-Print Network [OSTI]

We propose a Stellar Locus OuTlier (SLOT) method to determine the binary fraction of main-sequence stars statistically. The method is sensitive to neither the period nor mass-ratio distributions of binaries, and able to provide model-free estimates of binary fraction for large numbers of stars of different populations in large survey volumes. We have applied the SLOT method to two samples of stars from the SDSS Stripe 82, constructed by combining the re-calibrated SDSS photometric data with respectively the spectroscopic information from the SDSS and LAMOST surveys. For the SDSS spectroscopic sample, we find an average binary fraction for field FGK stars of $41%\\pm2%$. The fractions decrease toward late spectral types, and are respectively $44%\\pm5%$, $43%\\pm3%$, $35%\\pm5%$, and $28%\\pm6%$ for stars of $g-i$ colors between 0.3 -- 0.6, 0.6 -- 0.9, 0.9 -- 1.2, and 1.2 - 1.6\\,mag. A modest metallicity dependence is also found. The fraction decreases with increasing metallicity. For stars of [Fe/H] between $-0.5$...

Yuan, Haibo; Xiang, Maosheng; Huang, Yang; Chen, Bingqiu

2014-01-01T23:59:59.000Z

453

On the invertibility of the XOR rotations of a binary word  

E-Print Network [OSTI]

We prove the following result regarding operations on a binary word whose length is a power of two: computing the exclusive-or of a number of rotated versions of the word is an invertible (one-to-one) operation if and only ...

Rivest, Ronald L.

454

TWO NEW LONG-PERIOD HOT SUBDWARF BINARIES WITH DWARF COMPANIONS  

SciTech Connect (OSTI)

Hot subdwarf stars with F-K main sequence binary companions have been known for decades, but the first orbital periods for such systems were published just recently. Current observations suggest that most have long periods, on the order of years, and that some are or once were hierarchical triple systems. As part of a survey with the Hobby-Eberly Telescope, we have been monitoring the radial velocities of several composite-spectra binaries since 2005 in order to determine their periods, velocities, and eccentricities. Here we present observations and orbital solutions for two of these systems, PG 1449+653 and PG 1701+359. Similar to the other sdB+F/G/K binaries with solved orbits, their periods are long, 909 and 734 days, respectively, and pose a challenge to current binary population synthesis models of hot subdwarf stars. Intrigued by their relatively large systemic velocities, we also present a kinematical analysis of both targets and find that neither is likely a member of the Galactic thin disk.

Barlow, Brad N.; Wade, Richard A. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Liss, Sandra E. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Green, Elizabeth M., E-mail: bbarlow@psu.edu [Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721 (United States)

2013-07-01T23:59:59.000Z

455

Two-dimensional kinetics of binary nucleation in sulfuric acidwater mixtures  

E-Print Network [OSTI]

. INTRODUCTION Binary homogeneous nucleation is a mechanism for gas- to-particle conversion that can result in significant rates of new particle formation even if both components are under- saturated in the gas phase. An important example is the at- mospheric production of sulfuric acid in the presence of am- bient water vapor

456

Targeting supermassive black hole binaries and gravitational wave sources for the pulsar timing array  

Science Journals Connector (OSTI)

......INTRODUCTION Studies of the dynamics...of the two systems, it is customary...from binary systems (Misner, Thorne Wheeler 1973; Maggiore...the pulses (Foster Backer 1990...catalogue, and study how the efficiency...very massive systems in the low-redshift...signal is to study the distribution......

Pablo A. Rosado; Alberto Sesana

2014-01-01T23:59:59.000Z

457

Chemical Reaction of Metal-Carbon Binary Cluster Anions by FT-ICR Mass Spectrometer  

E-Print Network [OSTI]

45 48 51 54 57 60 Number of Carbon Atoms Intensity(arbitrary) (a) as injected (b) SWIFTed (c) NO 1sChemical Reaction of Metal-Carbon Binary Cluster Anions by FT-ICR Mass Spectrometer S. Maruyama, M- fullerene and single walled carbon nanotubes are investigated through experimental studies of interaction

Maruyama, Shigeo

458

FT-ICR ,,,Carbon Clusters and Metal/Carbon Binary Clusters  

E-Print Network [OSTI]

60 70 80 720 760 800 Ion Mass [amu] ScC60 + C64 + Number of Carbon Atoms Intensity(arb.units) ScC60FT-ICR ,?,æ,éCarbon Clusters and Metal/Carbon Binary Clusters ·>Í­ì·³"¹1 ·C Masamichi Kohno1 , Tetsuya

Maruyama, Shigeo

459

An optimal parallel algorithm for the Euclidean distance maps of 2D binary images  

E-Print Network [OSTI]

The Euclidean distance map (EDM) of a black and white n 2 n binary image is the n 2 n map where each element has the Euclidean distance between the corresponding pixel and the nearest black pixel. The EDM plays an important role in machine vision, pattern recognition, and robotics[9]. Many algorithms have been proposed

Fujiwara, Akihiro

460

The Hamilton principle for fluid binary mixtures with two temperatures Henri Gouin1  

E-Print Network [OSTI]

The Hamilton principle for fluid binary mixtures with two temperatures Henri Gouin1 and Tommaso, the Hamilton principle of least action is able to produce the equation of motion for each component that the Hamilton principle can afford to obtain the equations of motions for multi- temperature mixtures of fluids

Boyer, Edmond

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
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461

Gravitational waves from inspiralling compact binaries: Energy loss and waveform to second--post-Newtonian order  

E-Print Network [OSTI]

Gravitational waves generated by inspiralling compact binaries are investigated to the second--post-Newtonian (2PN) approximation of general relativity. Using a recently developed 2PN-accurate wave generation formalism, we compute the gravitational waveform and associated energy loss rate from a binary system of point-masses moving on a quasi-circular orbit. The crucial new input is our computation of the 2PN-accurate ``source'' quadrupole moment of the binary. Tails in both the waveform and energy loss rate at infinity are explicitly computed. Gravitational radiation reaction effects on the orbital frequency and phase of the binary are deduced from the energy loss. In the limiting case of a very small mass ratio between the two bodies we recover the results obtained by black hole perturbation methods. We find that finite mass ratio effects are very significant as they increase the 2PN contribution to the phase by up to 52\\%. The results of this paper should be of use when deciphering the signals observed by the future LIGO/VIRGO network of gravitational-wave detectors.

Luc Blanchet; Thibault Damour; Bala R. Iyer

1995-01-24T23:59:59.000Z

462

White Dwarfs in Binary Systems A white dwarf orbiting another star can become active  

E-Print Network [OSTI]

White Dwarfs in Binary Systems A white dwarf orbiting another star can become active when the other becomes incandescent. #12;H and He from the companion build up on the white dwarf's surface. Classical. Explosions from White Dwarf Star RS Oph #12;Classical Novae: RS Ophiuci Recurrent Nova RS Ophiuci Explosions

Barnes, Joshua Edward

463

In vitro corrosion and biocompatibility of binary magnesium alloys Xuenan Gu a  

E-Print Network [OSTI]

In vitro corrosion and biocompatibility of binary magnesium alloys Xuenan Gu a , Yufeng Zheng a 2 September 2008 Accepted 21 October 2008 Available online 9 November 2008 Keywords: Magnesium alloy Corrosion In vitro Cytotoxicity Hemocompatibility a b s t r a c t As bioabsorbable materials, magnesium

Zheng, Yufeng

464

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys  

E-Print Network [OSTI]

Simulation of Stresses during Casting of Binary Magnesium-Aluminum Alloys M.G. POKORNY, C.A. MONROE properties that are suitable for advanced stress modeling is even more limited for magnesium alloys. Recently of an AZ91 magnesium alloy in order to predict hot tears.[4] This study relied on crude estimates

Beckermann, Christoph

465

Constraining the Equation of State of Neutron Stars from Binary Mergers  

E-Print Network [OSTI]

Determining the equation of state of matter at nuclear density and hence the structure of neutron stars has been a riddle for decades. We show how the imminent detection of gravitational waves from merging neutron star binaries can be used to solve this riddle. Using a large number of accurate numerical-relativity simulations of binaries with nuclear equations of state, we find that the postmerger emission is characterized by two distinct and robust spectral features. While the high-frequency peak has already been associated with the oscillations of the hypermassive neutron star produced by the merger and depends on the equation of state, a new correlation emerges between the low-frequency peak, related to the merger process, and the total compactness of the stars in the binary. More importantly, such a correlation is essentially universal, thus providing a powerful tool to set tight constraints on the equation of state. If the mass of the binary is known from the inspiral signal, the combined use of the two frequency peaks sets four simultaneous constraints to be satisfied. Ideally, even a single detection would be sufficient to select one equation of state over the others. We test our approach with simulated data and verify it works well for all the equations of state considered.

Kentaro Takami; Luciano Rezzolla; Luca Baiotti

2014-03-22T23:59:59.000Z

466

Spectral properties of the post-merger gravitational-wave signal from binary neutron stars  

E-Print Network [OSTI]

Extending previous work by a number of authors, we have recently presented a new approach in which the detection of gravitational waves from merging neutron star binaries can be used to determine the equation of state of matter at nuclear density and hence the structure of neutron stars. In particular, after performing a large number of numerical-relativity simulations of binaries with nuclear equations of state, we have found that the post-merger emission is characterized by two distinct and robust spectral features. While the high-frequency peak was already shown to be associated with the oscillations of the hypermassive neutron star produced by the merger and to depend on the equation of state, we have highlighted that the low-frequency peak is related to the merger process and to the total compactness of the stars in the binary. This relation is essentially universal and provides a powerful tool to set tight constraints on the equation of state. We here provide additional information on the extensive analysis performed, illustrating the methods used, the tests considered, and the robustness of the results. We also discuss additional relations that can be deduced when exploring the data and how these correlate with various properties of the binary. Finally, we present a simple mechanical toy model that explains the main spectral features of the post-merger signal and can even reproduce analytically the complex waveforms emitted right after the merger.

Kentaro Takami; Luciano Rezzolla; Luca Baiotti

2014-12-10T23:59:59.000Z

467

3D binary anti-commutative operadic Lax representations for harmonic oscillator  

E-Print Network [OSTI]

It is explained how the time evolution of the operadic variables may be introduced by using the operadic Lax equation. The operadic Lax representations for the harmonic oscillator are constructed in 3-dimensional binary anti-commutative algebras. As an example, an operadic Lax representation for the harmonic oscillator in the Lie algebra sl(2) is constructed.

Eugen Paal; Jyri Virkepu

2008-06-08T23:59:59.000Z

468

Ionic liquid binary mixtures: Promising reaction media for carbohydrate conversion into 5-hydroxymethylfurfural  

Science Journals Connector (OSTI)

Abstract The conversion of carbohydrates into 5-hydroxymethylfurfural (5-HMF) has been studied in binary mixtures of ionic liquids (ILs), using strongly acidic resin Amberlyst 15 as the catalyst. In particular, both mono- and disaccharides, such as fructose, glucose and sucrose have been investigated. Considering the favorable effect exerted by chloride-based ionic liquids in the dissolution of carbohydrates, we used binary mixtures of 1-butyl-3-methylimidazolium chloride ([bmim][Cl]) with [bmim+] based ionic liquids differing in size, shape and coordination ability of the anion ([bmim][BF4], [bmim][N(CF3SO2)2], [bmim][N(CN)2], [bmim][SbF6] and [bmim][CF3SO3]). Carbohydrate conversion in [bmim][BF4]/[bmim][Cl] binary mixtures, has been studied under both magnetic stirring and ultrasound (US) activation. The catalytic system used led to the formation of 5-hydroxymethylfurfural in good yield under mild conditions. A significant influence of IL binary mixture composition on the outcome of the target processes was evidenced. Improvements in both reaction time and temperature have been observed, under US activation.

Francesca DAnna; Salvatore Marullo; Paola Vitale; Carla Rizzo; Paolo Lo Meo; Renato Noto

2014-01-01T23:59:59.000Z

469

BUBBLE CHARACTERISTICS AND CONVECTIVE EFFECTS IN THE FLOW BOILING HEAT TRANSFER OF BINARY MIXTURES  

E-Print Network [OSTI]

BUBBLE CHARACTERISTICS AND CONVECTIVE EFFECTS IN THE FLOW BOILING HEAT TRANSFER OF BINARY MIXTURES on the bubble growth and associated heat transfer phenomena. The present work focuses on obtaining the bubble. The bubble growth is observed using a high speed camera (1000 fps) under a magnification of 290X. The bubble

Kandlikar, Satish

470

Affine Nested Loop Programs and their Binary Parameterized Dataflow Graph Counterparts  

E-Print Network [OSTI]

Affine Nested Loop Programs and their Binary Parameterized Dataflow Graph Counterparts Ed F Parameterized static affine nested loop programs can be automatically converted to input-output equivalent Kahn affine nested loop programs which are nested loop programs in which the loop boundaries, the conditions

Bhattacharyya, Shuvra S.

471

Liquid?Liquid Equilibria for Binary and Ternary Polymer Solutions with PC-SAFT  

Science Journals Connector (OSTI)

Liquid?Liquid Equilibria for Binary and Ternary Polymer Solutions with PC-SAFT ... The algorithms are used for investigating the correlative and predictive capabilities of the thermodynamic model PC-SAFT. ... The algorithms are used for testing of a state-of-the-art model in polymer thermodynamics, PC-SAFT, by Gross and Sadowski. ...

Thomas Lindvig; Michael L. Michelsen; Georgios M. Kontogeorgis

2004-01-21T23:59:59.000Z

472

Content-based Audio Classification using Collective Network of Binary Classifiers  

E-Print Network [OSTI]

Content-based Audio Classification using Collective Network of Binary Classifiers Toni Mäkinen) framework is presented for content-based audio classification. The topic has been studied in several and the number of classes, as well as to create a scalable network design, which allows introducing new audio

Gabbouj, Moncef

473

BOOSTED BINARY AUDIO FINGERPRINT BASED ON SPECTRAL SUBBAND MOMENTS Sungwoong Kim and Chang D. Yoo  

E-Print Network [OSTI]

BOOSTED BINARY AUDIO FINGERPRINT BASED ON SPECTRAL SUBBAND MOMENTS Sungwoong Kim and Chang D. Yoo@kaist.ac.kr, cdyoo@ee.kaist.ac.kr ABSTRACT An audio fingerprinting system identifies an audio based on a unique feature vector called the audio fingerprint. The performance of an audio fingerprinting system is directly

Yoo, Chang D.

474

Cool Bottom Processes on the Thermally Pulsing Asymptotic Giant Branch and the Isotopic Composition of Circumstellar Dust Grains  

Science Journals Connector (OSTI)

We examine the effects of cool bottom processing (CBP) on the isotopic ratios 18O/16O, 17O/16O, 14N/15N, 26Al/27Al, C/O, and N/O in the convective envelope during the thermally pulsing asymptotic giant branch (TP-AGB) phase of evolution in a 1.5 M? initial mass star of solar initial composition. We use a parametric model that treats extra mixing by introducing mass flow between the convective envelope and the underlying radiative zone. The parameters of this model are the mass circulation rate () and the maximum temperature (TP) experienced by the circulating material. The effects of nuclear reactions in the flowing matter were calculated using a set of static structures of the radiative zone selected from particular times in a complete stellar evolution calculation. The compositions of the flowing material were obtained, and the resulting changes in the envelope determined. No major shifts in the star's energy budget occur from the imposed CBP if log TP 26Al were essentially independent of the time chosen if log TP > 7.6. Abundant 26Al was produced by CBP for log TP > 7.65. While 26Al/27Al depends on TP, the other isotopic ratios depend dominantly on the circulation rate. The relationship is shown between models of CBP as parameterized by a diffusion formalism within the stellar evolution model and those using the mass-flow formalism employed here. They are shown to be effectively equivalent. In general, the CBP treatment readily permits calculation of envelope compositions as affected by different degrees of extra mixing, based on stellar structures computed by normal stellar evolution models. Using these results, the isotopic ratios under conditions of C/O 1 are compared with the data on circumstellar dust grains. It is found that the 18O/16O, 17O/16O, and 26Al/27Al observed for oxide grains formed at C/O 15N/14N, 12C/13C, and 26Al/27Al in carbide grains (C/O > 1) require that many of their stellar sources must have had 14N/15N at least a factor of 4 lower than the solar value. This allows a self-consistent description of all these isotopes in most SiC grains. The rare grains with 12C/13C

Kenneth M. Nollett; M. Busso; G. J. Wasserburg

2003-01-01T23:59:59.000Z

475

An effectual template bank for the detection of gravitational waves from inspiralling compact binaries with generic spins  

E-Print Network [OSTI]

We report the construction of a three-dimensional template bank for the search for gravitational waves from inspiralling binaries consisting of spinning compact objects. The parameter space consists of two dimensions describing the mass parameters and one "reduced-spin" parameter, which describes the secular (non-precessing) spin effects in the waveform. The template placement is based on an efficient stochastic algorithm and makes use of the semi-analytical computation of a metric in the parameter space. We demonstrate that for "low-mass" ($m_1 + m_2 \\lesssim 12\\,M_\\odot$) binaries, this template bank achieves effective fitting factors $\\sim0.92$--$0.99$ towards signals from generic spinning binaries in the advanced detector era over the entire parameter space of interest (including binary neutron stars, binary black holes, and black hole-neutron star binaries). This provides a powerful and viable method for searching for gravitational waves from generic spinning low-mass compact binaries. Under the assumption that spin magnitudes of black-holes [neutron-stars] are uniformly distributed between 0--0.98 [0 -- 0.4] and spin angles are isotropically distributed, the expected improvement in the average detection volume (at a fixed signal-to-noise-ratio threshold) of a search using this reduced-spin bank is $\\sim20-52\\%$, as compared to a search using a non-spinning bank.

P. Ajith; N. Fotopoulos; S. Privitera; A. Neunzert; N. Mazumder; A. J. Weinstein

2014-05-21T23:59:59.000Z

476

BWRSAR (Boiling Water Reactor Severe Accident Response) calculations of reactor vessel debris pours for Peach Bottom short-term station blackout  

SciTech Connect (OSTI)

This paper describes recent analyses performed by the BWR Severe Accident Technology (BWRSAT) Program at Oak Ridge National Laboratory to estimate the release of debris from the reactor vessel for the unmitigated short-term station blackout accident sequence. Calculations were performed with the BWR Severe Accident Response (BWRSAR) code and are based upon consideration of the Peach Bottom Atomic Power Station. The modeling strategies employed within BWRSAR for debris relocation within the reactor vessel are briefly discussed and the calculated events of the accident sequence, including details of the calculated debris pours, are presented. 4 refs., 13 figs., 3 tabs.

Hodge, S.A.; Ott, L.J.

1988-01-01T23:59:59.000Z

477

Search for gravitational waves from low mass compact binary coalescence in 186 days of LIGOs fifth science run  

E-Print Network [OSTI]

We report on a search for gravitational waves from coalescing compact binaries, of total mass between 2 and 35M[subscript ?], using LIGO observations between November 14, 2006 and May 18, 2007. No gravitational-wave signals ...

Zucker, Michael E.

478

Search for gravitational waves from compact binary coalescence in LIGO and Virgo data from S5 and VSR1  

E-Print Network [OSTI]

We report the results of the first search for gravitational waves from compact binary coalescence using data from the Laser Interferometer Gravitational-Wave Observatory and Virgo detectors. Five months of data were collected ...

Barsotti, Lisa

479

Fundamental measure density functional theory studies on the freezing of binary hard-sphere and Lennard-Jones mixtures  

E-Print Network [OSTI]

Fundamental measure density functional theory studies on the freezing of binary hard are calculated using the fundamental measure density functional theory. Using the thermodynamic perturbation. INTRODUCTION Density functional theory DFT became a practical the- oretical tool for the calculation

Song, Xueyu

480

Diagnosing the Sensitivity of Binary Image Measures to Bias, Location, and Event Frequency within a Forecast Verification Framework  

Science Journals Connector (OSTI)

While the use of binary distance measures has a substantial history in the field of image processing, these techniques have only recently been applied in the area of forecast verification. Designed to quantify the distance between two images, ...

Benjamin R. J. Schwedler; Michael E. Baldwin

2011-12-01T23:59:59.000Z