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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 Bottoming Binary Unit - Final Technical Report for EE0002856  

SciTech Connect

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

3

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":""}]}

4

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":""}]}

5

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.

6

BEOWAWE number1-A 10 MW geothermal unit in northern Nevada  

SciTech Connect

This paper describes a project to build and operate a nominal 10 mw electrical generating unit using the geothermal heat from the Beowawe, Nevada, geothermal reservoir to power an isobutane binary unit. This 10 mw unit would be fabricated on portable skids by equipment supplier for shipment to the site. The project will be owned and operated by the NORNEV Demonstration Geothermal Company which is made up of Pacific Power and Light, Eugene Water and Electric Board, Sierra Pacific Power Company, and Sacramento Municipal Utility District. The geothermal brine for powering the 10 mw binary WGU will be purchased from Chevron Resource Company. This first unit is a research and development unit and will, hopefully, lead to total development of the 300 mw plus Beowawe reservoir.

Keilman, L.

1982-10-01T23:59:59.000Z

7

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.

8

Geothermal: Sponsored by OSTI -- Beowawe Geothermal Area evaluation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Beowawe Geothermal Area evaluation program. Final report Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search About...

9

Direct-Current Resistivity Survey At Beowawe Hot Springs Area...  

Open Energy Info (EERE)

Activity Details Location Beowawe Hot Springs Area Exploration Technique Direct-Current Resistivity Survey Activity Date Usefulness useful DOE-funding Unknown References Sabodh...

10

Beowawe Geothermal Area evaluation program. Final report  

DOE Green Energy (OSTI)

Several exploration programs were conducted at the Beowawe Geothermal Prospect, Lander and Eureka County, Nevada. Part I, consisting of a shallow temperature hole program, a mercury soil sampling survey, and a self-potential survey were conducted in order to select the optimum site for an exploratory well. Part II consisted of drilling a 5927-foot exploratory well, running geophysical logs, conducting a drill stem test (2937-3208 feet), and a short-term (3-day) flow test (1655-2188 feet). All basic data collected is summarized.

Iovenitti, J. L

1981-03-01T23:59:59.000Z

11

Flow and permeability structure of the Beowawe, Nevada hydrothermal system  

DOE Green Energy (OSTI)

A review of past geologic, geochemical, hydrological, pressure transient, and reservoir engineering studies of Beowawe suggests a different picture of the reservoir than previously presented. The Beowawe hydrothermal contains buoyant thermal fluid dynamically balanced with overlying cold water, as shown by repeated temperature surveys and well test results. Thermal fluid upwells from the west of the currently developed reservoir at the intersection of the Malpais Fault and an older structural feature associated with mid-Miocene rifting. A tongue of thermal fluid rises to the east up the high permeability Malpais Fault, discharges at the Geysers area, and is in intimate contact with overlying cooler water. The permeability structure is closely related to the structural setting, with the permeability of the shallow hydrothermal system ranging from 500 to 1,000 D-ft, while the deeper system ranges from 200 to 400 D-ft.

Faulder, D.D. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); Johnson, S.D.; Benoit, W.R. [Oxbow Power Services, Inc., Reno, NV (United States)

1997-05-01T23:59:59.000Z

12

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

13

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

14

Mapping the acid stimulation in the Beowawe geothermal field using surface electrical potentials  

DOE Green Energy (OSTI)

A surface electrical potential system was fielded during the chemical stimulation of the Rossi 21-19 well in the Beowawe Geothermal Field. The technique, which measures variations in resistivity resulting from the flow of conductive fluid into the reservoir, was not only shown to be highly sensitive to the chemical treatment, but was also responsive to in situ conductive zones before any acid injection. A review of the experiment and a preliminary interpretation of the data are presented. The data provide convincing evidence that it should be possible to map the treated zone as well as the primary pretreatment in situ conductive zones.

Hart, C.M.; Engi, D.; Morris, H.E.

1983-01-01T23:59:59.000Z

15

Mapping the Acid Stimulation in the Beowawe Geothermal Field Using Surface Electrical Potentials  

DOE Green Energy (OSTI)

A surface electrical potential system was fielded during the chemical stimulation of the Rossi 21-19 well in the Beowawe Geothermal Field. The technique, which measures variations in resistivity resulting from the flow of conductive fluid into the reservoir, was not only shown to be highly sensitive, not only to the chemical treatment, but also to the in situ conductive zones before any acid injection. A review of the experiment and a preliminary interpretation of the data are presented. The data provide convincing evidence that it should be possible to map the treated zone as well as the primary pretreatment in situ conductive zones.

Hart, Carolyne M.; Engi, Dennis; Morris, Harris E.

1983-12-15T23:59:59.000Z

16

Session 18: Geothermal Well Stimulation - Program Summary and the Beowawe Field Experiment  

DOE Green Energy (OSTI)

Republic Geothermal, Inc. and its subcontractors have planned and executed laboratory studies and eight well stimulation field experiments under the Geothermal Reservoir Well Stimulation Program (GRWSP). The program, begun in February 1979, has concentrated on extending petroleum industry stimulation technology for use by the geothermal industry. The most recent experiment was in a naturally fractured Chevron well at Beowawe and involved an acid stimulation of a damaged interval which yielded a 2.3-fold increase in injectivity. Overall results to date have shown that stimulation is viable where adequate reservoirs are penetrated by wells encountering formation damage or locally tight formations. However, wells in marginal naturally fractured reservoirs have not been saved by the types of well stimulation jobs performed thus far. A recent discovery is that many wells can possibly be made outstanding producers by widening and propping compliant natural fractures. Confirmation of this constitutes unfinished business of the GRWSP, and offers one of the greatest potential opportunities for enhancing the economics of geothermal power production.

Verity, R.V.

1983-12-01T23:59:59.000Z

17

Beowawe geothermal-resource assessment. Final report. Shallow-hole temperature survey geophysics and deep test hole Collins 76-17  

DOE Green Energy (OSTI)

Geothermal resource investigation field efforts in the Beowawe Geysers Area, Eureka County, Nevada are described. The objectives included acquisition of geotechnical data for understanding the nature and extent of the geothermal resource boundaries south of the known resource area. Fourteen shallow (<500 feet) temperature-gradient holes plus geophysics were used to select the site for a deep exploratory well, the Collins 76-17, which was completed to a total depth of 9005 feet. Maximum downhole recorded temperature was 311/sup 0/F, but no flow could be induced.

Jones, N.O.

1983-03-01T23:59:59.000Z

18

Evaluation of a Distributed Fiber-Optic Temperature Sensor for Logging Wellbore Temperature at the Beowawe and Dixie Valley Geothermal Fields  

DOE Green Energy (OSTI)

A distributed temperature sensor (DTS) system, utilizing Raman backscattering to measure temperatures of optical fiber, has recently been installed in production wells at the Beowawe and Dixie Valley, NV, geothermal fields. The system has the potential to reduce the cost and complexity of acquiring temperature logs. However, the optical transmission of the initial fibers installed at Beawawe degraded over several months, resulting in temperature errors. Optical transmission spectra of the failed fibers indicate hydroxide contamination via hydrogen diffusion as a possible failure mechanism. Additional fibers with coatings designed to resist hydrogen diffusion were installed and have maintained their optical transmission over several months in the 340-360 F Beowawe wells. The same fibers installed in a 470 F Dixie Valley well rapidly failed. Possible methods to prevent fiber degradation include encasing the fiber in metallic buffer layer that resists hydrogen diffusion. Additional methods to correct temperature errors include using additional optical sources to measure fiber losses at the operating wavelengths. Although the DTS system is expected to have one degree F accuracy, we have observed an average accuracy of five degrees. The fiber connections appear to be the uncertainty source. Using connectors with greater stability should restore accuracy.

Smithpeter, Colin; Norman, Randy; Krumhansl, James; Benoit, Dick; Thompson, Steve

1999-07-19T23:59:59.000Z

19

FINAL TECHNICAL REPORT United States Department of Energy  

NLE Websites -- All DOE Office Websites (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:

20

Ocean bottom seisometer  

SciTech Connect

An improved ocean bottom seismometer is described comprising: a spherical-shaped main housing having a seismic acquisition portion and a ballast portion below the acquisition portion. The ballast portion controls the ascent and descent of the ocean bottom seismometer; a conical skirt fixed to the main housing elevating the main housing above a horizontal plane coincident with a base of the skirt. The skirt is capable of confining fluid under the main housing when the base rests on an ocean bottom; spherical compartments mounted inside the skirt; and a lifting hook mounted on the outside of the main housing.

Neeley, W.P.

1987-09-08T23:59:59.000Z

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

CX-001564: Categorical Exclusion Determination | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

22

Sea bottom coring apparatus  

SciTech Connect

A marine bottom coring apparatus for drilling into and obtaining core samples from subsea formations is described. It is particularly useful for obtaining core samples from hard rock formations. The apparatus includes a frame having buoyancy, which has sufficient capacity to float the apparatus in the unballast condition. Ballasting means are also connected to the frame and having ballast capacity sufficient to overcome a buoyancy of the buoyancy means. Release means are provided for releasing the ballast at a predetermined time. The frame has the core drilling means attached to it and is supported on the sea bottom, whereby the apparatus may be sunk to the sea bottom by the ballast, a core sample drilled from the subsea formation, and the apparatus floated to the surface upon release of the ballast. (11 claims)

Williamson, T.N.

1969-05-06T23:59:59.000Z

23

Charmed Bottom Baryon Spectroscopy  

Science Conference Proceedings (OSTI)

The arena of doubly and triply heavy baryons remains experimentally unexplored to a large extent. This has led to a great deal of theoretical effort being put forth in the calculation of mass spectra in this sector. Although the detection of such heavy particle states may lie beyond the reach of experiments for some time, it is interesting to compare results between lattice QCD computations and continuum theoretical models. Several recent lattice QCD calculations exist for both doubly and triply charmed as well as doubly and triply bottom baryons. In this work we present preliminary results from the first lattice calculation of the mass spectrum of doubly and triply heavy baryons including both charm and bottom quarks. The wide range of quark masses in these systems require that the various flavors of quarks be treated with different lattice actions. We use domain wall fermions for 2+1 flavors (up down and strange) of sea and valence quarks, a relativistic heavy quark action for the charm quarks, and non-relativistic QCD for the heavier bottom quarks. The calculation of the ground state spectrum is presented and compared to recent models.

Zachary Brown, William Detmold, Stefan Meinel, Konstantinos Orginos

2012-09-01T23:59:59.000Z

24

Dixie Valley Bottoming Binary Project Geothermal Project | Open...  

Open Energy Info (EERE)

the NGDS and DOE GTP for two years. -Economic and environmental benefits, specifically job creation, income generation, increased tax and royalty payments, and decreased...

25

Pennsylvania Nuclear Profile - Peach Bottom  

U.S. Energy Information Administration (EIA) Indexed Site

Peach Bottom" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

26

Bottom Ash System Maintenance Guide  

Science Conference Proceedings (OSTI)

This guide provides information to personnel involved in the bottom ash system and its components, including good maintenance practices, condition monitoring, predictive and preventive maintenance techniques, probable failure modes, and troubleshooting guidance. The guide was developed primarily to provide detailed maintenance and troubleshooting information but also includes basic system information.

2000-10-31T23:59:59.000Z

27

The bottom of the ocean food chain  

NLE Websites -- All DOE Office Websites (Extended Search)

The bottom of the ocean food chain 1663 Los Alamos science and technology magazine Latest Issue:July 2013 All Issues submit The bottom of the ocean food chain Global ocean...

28

Bottom Topography Mapping via Nonlinear Data Assimilation  

Science Conference Proceedings (OSTI)

A variational data assimilation method is described for bottom topography mapping in rivers and estuaries using remotely sensed observations of water surface currents. The velocity field and bottom topography are related by the vertically ...

Edward D. Zaron; Marie-Aude Pradal; Patrick D. Miller; Alan F. Blumberg; Nickitas Georgas; Wei Li; Julia Muccino Cornuelle

2011-12-01T23:59:59.000Z

29

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

30

Coal liquefaction with subsequent bottoms pyrolysis  

DOE Patents (OSTI)

In a coal liquefaction process wherein heavy bottoms produced in a liquefaction zone are upgraded by coking or a similar pyrolysis step, pyrolysis liquids boiling in excess of about 1000.degree. F. are further reacted with molecular hydrogen in a reaction zone external of the liquefaction zone, the resulting effluent is fractionated to produce one or more distillate fractions and a bottoms fraction, a portion of this bottoms fraction is recycled to the reaction zone, and the remaining portion of the bottoms fraction is recycled to the pyrolysis step.

Walchuk, George P. (Queens, NY)

1978-01-01T23:59:59.000Z

31

Double Degenerate Binary Systems  

Science Conference Proceedings (OSTI)

In this study, angular momentum loss via gravitational radiation in double degenerate binary (DDB)systems (NS + NS, NS + WD, WD + WD, and AM CVn) is studied. Energy loss by gravitational waves has been estimated for each type of systems.

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

2011-09-21T23:59:59.000Z

32

Water waves over strongly undulating bottom  

E-Print Network (OSTI)

Two-dimensional free-surface potential flows of an ideal fluid over a strongly inhomogeneous bottom are investigated with the help of conformal mappings. Weakly-nonlinear and exact nonlinear equations of motion are derived by the variational method for arbitrary seabed shape parameterized by an analytical function. The band structure of linear waves over periodic bottoms is calculated.

Ruban, V P

2004-01-01T23:59:59.000Z

33

Life on the Bottom of a Stream  

NLE Websites -- All DOE Office Websites (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.

34

Pipeline bottoming cycle study. Final report  

Science Conference Proceedings (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

35

Binary ferrihydrite catalysts  

DOE Patents (OSTI)

A method of preparing a catalyst precursor comprises dissolving an iron salt and a salt of an oxoanion forming agent, in water so that a solution of the iron salt and oxoanion forming agent salt has a ratio of oxoanion/Fe of between 0.0001:1 to 0.5:1. Next is increasing the pH of the solution to 10 by adding a strong base followed by collecting of precipitate having a binary ferrihydrite structure. A binary ferrihydrite catalyst precursor is also prepared by dissolving an iron salt in water. The solution is brought to a pH of substantially 10 to obtain ferrihydrite precipitate. The precipitate is then filtered and washed with distilled water and subsequently admixed with a hydroxy carboxylic acid solution. The admixture is mixed/agitated and the binary ferrihydrite precipitate is then filtered and recovered. 3 figs.

Huffman, G.P.; Zhao, J.; Feng, Z.

1996-12-03T23:59:59.000Z

36

Binary ferrihydrite catalysts  

DOE Patents (OSTI)

A method of preparing a catalyst precursor comprises dissolving an iron salt and a salt of an oxoanion forming agent, in water so that a solution of the iron salt and oxoanion forming agent salt has a ratio of oxoanion/Fe of between 0.0001:1 to 0.5:1. Next is increasing the pH of the solution to 10 by adding a strong base followed by collecting of precipitate having a binary ferrihydrite structure. A binary ferrihydrite catalyst precursor is also prepared by dissolving an iron salt in water. The solution is brought to a pH of substantially 10 to obtain ferrihydrite precipitate. The precipitate is then filtered and washed with distilled water and subsequently admixed with a hydroxy carboxylic acid solution. The admixture is mixed/agitated and the binary ferrihydrite precipitate is then filtered and recovered.

Huffman, Gerald P. (Lexington, KY); Zhao, Jianmin (Lexington, KY); Feng, Zhen (Lexington, KY)

1996-01-01T23:59:59.000Z

37

Stratification Effects in a Bottom Ekman Layer  

Science Conference Proceedings (OSTI)

A stratified bottom Ekman layer over a nonsloping, rough surface is studied using a three-dimensional unsteady large eddy simulation to examine the effects of an outer layer stratification on the boundary layer structure. When the flow field is ...

John R. Taylor; Sutanu Sarkar

2008-11-01T23:59:59.000Z

38

Double Bottom Line Project Report:Assessing Social Impact In Double Bottom Line Ventures  

E-Print Network (OSTI)

of Key Characteristics Glossary Method Summaries Theories ofin double bottom line ventures methods catalog glossary ofterms glossary of terms This glossary defines the variables

Rosenzweig, William

2004-01-01T23:59:59.000Z

39

Binary Tetrahedral Flavor Symmetry  

E-Print Network (OSTI)

A study of the T' Model and its variants utilizing Binary Tetrahedral Flavor Symmetry. We begin with a description of the historical context and motivations for this theory, together with some conceptual background for added clarity, and an account of our theory's inception in previous works. Our model endeavors to bridge two categories of particles, leptons and quarks, a unification made possible by the inclusion of additional Higgs particles, shared between the two fermion sectors and creating a single coherent system. This is achieved through the use of the Binary Tetrahedral symmetry group and an investigation of the Tribimaximal symmetry evidenced by neutrinos. Our work details perturbations and extensions of this T' Model as we apply our framework to neutrino mixing, quark mixing, unification, and dark matter. Where possible, we evaluate model predictions against experimental results and find excellent matching with the atmospheric and reactor neutrino mixing angles, an accurate prediction of the Cabibb...

Eby, David A

2013-01-01T23:59:59.000Z

40

Accretion in Compact Binaries  

E-Print Network (OSTI)

Compact binaries have long been a paradigm for accretion theory. Much of our present view of how accretion occurs comes directly from the comparison of theory with observations of these sources. Since theory differs little for other objects such as active galaxies, increasing efforts have recently gone into searching for correspondences in observed behaviour. This chapter aims at giving a concise summary of the field, with particular emphasis on new developments since the previous edition of this book. These developments have been significant. Much of the earlier literature implicitly assumed that accreting binaries were fairly steady sources accreting most of the mass entering their vicinity, often with main-sequence companions, and radiating the resulting accretion luminosity in rough isotropy. We shall see that in reality these assumptions fail for the majority of systems. Most are transient; mass ejection in winds and jets is extremely common; a large (sometimes dominant) fraction of even short-period systems have evolved companions whose structure deviates significantly from the zero-age main sequence; and the radiation pattern of many objects is significantly anisotropic. It is now possible to give a complete characterization of the observed incidence of transient and persistent sources in terms of the disc instability model and formation constraints. X-ray populations in external galaxies, particularly the ultraluminous sources, are revealing important new insights into accretion processes and compact binary evolution.

Andrew R. King

2003-01-07T23:59:59.000Z

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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

The Spindown of Bottom-Trapped Plumes  

Science Conference Proceedings (OSTI)

This note considers the decay of a bottom-trapped freshwater plume after the causative freshwater inflow has ceased. It is shown that shortly after the low-density inflow stops, the barotropic pressure field that it created radiates away and the ...

Ricardo P. Matano; Elbio D. Palma

2010-07-01T23:59:59.000Z

42

Binary Cultivation in Photobioreactors - Available ...  

The approach uses binary cultivationinside photobioreactorsto facilitate growth by creating a closed system in ... ranging from CO2 from power plant ...

43

Binary Tetrahedral Flavor Symmetry  

E-Print Network (OSTI)

A study of the T' Model and its variants utilizing Binary Tetrahedral Flavor Symmetry. We begin with a description of the historical context and motivations for this theory, together with some conceptual background for added clarity, and an account of our theory's inception in previous works. Our model endeavors to bridge two categories of particles, leptons and quarks, a unification made possible by the inclusion of additional Higgs particles, shared between the two fermion sectors and creating a single coherent system. This is achieved through the use of the Binary Tetrahedral symmetry group and an investigation of the Tribimaximal symmetry evidenced by neutrinos. Our work details perturbations and extensions of this T' Model as we apply our framework to neutrino mixing, quark mixing, unification, and dark matter. Where possible, we evaluate model predictions against experimental results and find excellent matching with the atmospheric and reactor neutrino mixing angles, an accurate prediction of the Cabibbo angle, and a dark matter candidate that remains outside the limits of current tests. Additionally, we include mention of a number of unanswered questions and remaining areas of interest for future study. Taken together, we believe these results speak to the promising potential of finite groups and flavor symmetries to act as an approximation of nature.

David A. Eby

2013-04-15T23:59:59.000Z

44

Bottom: The PNNL-developed Grid Friendly  

NLE Websites -- All DOE Office Websites (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

45

Part 1: The Bottom Line | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1: The Bottom Line Part 1: The Bottom Line Question: What is different about decommissioning under CERCLA from the way DOE has decommissioned facilities in the past? Answer: DOE...

46

Bottom Ekman Pumping with Stress-Dependent Eddy Viscosity  

Science Conference Proceedings (OSTI)

This paper reconsiders the classic problem of bottom Ekman pumping below a steady geostrophic flow by relaxing the assumption of a constant eddy viscosity. It is assumed instead that the eddy viscosity depends on the magnitude of the bottom ...

Benoit Cushman-Roisin; Vlado Mala?i?

1997-09-01T23:59:59.000Z

47

Hot Bottom Burning in Asymptotic Giant Branch Stars  

E-Print Network (OSTI)

Hot Bottom Burning in Asymptotic Giant Branch Stars By J OHN C. LATTANZ I O 1 , CHERYL A. FROST 1 state of knowledge about the phenomenon of Hot Bottom Burning as seen in Asymptotic Giant Branch stars. This is illustrated with some results from new 6M fi stellar models. 1. Introduction and Motivation Hot Bottom Burning

Lattanzio, John

48

Rankine bottoming cycle safety analysis. Final report  

SciTech Connect

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

49

Binary Quantum Search  

E-Print Network (OSTI)

Database search has wide applications and is used as a subroutine in many important algorithms. We shall consider a database with one target item. Quantum algorithm finds the target item in a database faster than any classical algorithm. It frequently occurs in practice that only a portion of information about the target item is interesting, or we need to find a group of items sharing some common feature as the target item. This problem is in general formulated as search for a part of the database [a block] containing the target item, instead of the item itself. This is partial search. Partial search trades accuracy for speed, i.e. it works faster than a full search. Partial search algorithm was discovered by Grover and Radhakrishnan. We shall consider optimized version of the algorithm and call it GRK. It can be applied successively [in a sequence]. First the database is partitioned into blocks and we use GRK to find the target block. Then this target block is partitioned into sub-blocks and we use GRK again to find the target sub-block. [We can call it binary quantum search.] Another possibility is to partition the database into sub-blocks directly and use GRK to find the target sub-block in one time. In this paper we prove that the latter is faster [makes less queries to the oracle].

Vladimir Korepin; Ying Xu

2007-05-06T23:59:59.000Z

50

Peach Bottom test element program. Final report  

Science Conference Proceedings (OSTI)

Thirty-three test elements were irradiated in the Peach Bottom high-temperature gas-cooled reactor (HTGR) as part of the testing program for advanced HTGRs. Extensive postirradiation examinations and evaluations of 21 of these irradiation experiments were performed. The test element irradiations were simulated using HTGR design codes and data. Calculated fuel burnups, power profiles, fast neutron fluences, and temperatures were verified via destructive burnup measurements, gamma scanning, and in-pile thermocouple readings corrected for decalibration effects. Analytical techniques were developed to improve the quality of temperature predictions through feedback of nuclear measurements into thermal calculations. Dimensional measurements, pressure burst tests, diametral compression tests, ring-cutting tests, strip-cutting tests, and four-point bend tests were performed to measure residual stress, strain, and strength distributions in H-327 graphite structures irradiated in the test elements.

Saurwein, J.J.; Holzgraf, J.F.; MIller, C.M.; Myers, B.F.; Wallroth, C.F.

1982-11-01T23:59:59.000Z

51

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

52

An electrically powered binary star?  

E-Print Network (OSTI)

We propose a model for stellar binary systems consisting of a magnetic and a non-magnetic white-dwarf pair which is powered principally by electrical energy. In our model the luminosity is caused by resistive heating of the stellar atmospheres due to induced currents driven within the binary. This process is reminiscent of the Jupiter-Io system, but greatly increased in power because of the larger companion and stronger magnetic field of the primary. Electrical power is an alternative stellar luminosity source, following on from nuclear fusion and accretion. We find that this source of heating is sufficient to account for the observed X-ray luminosity of the 9.5-min binary RX J1914+24, and provides an explanation for its puzzling characteristics.

Kinwah Wu; Mark Cropper; Gavin Ramsay; Kazuhiro Sekiguchi

2001-11-19T23:59:59.000Z

53

Assembly of a Molecular Needle, from the Bottom Up  

NLE Websites -- All DOE Office Websites (Extended Search)

Assembly of a Molecular Needle, from the Bottom Up Print Many pathogenic bacteria use a specialized secretion system to inject virulence proteins directly into the cells they...

54

Mineralization of Synthetic Polymer Scaffolds: A Bottom-Up ...  

Mineralization of Synthetic Polymer Scaffolds: A Bottom-Up Approach for the Development of Artificial Bone Jie Song,*,, Viengkham Malathong, and Carolyn R ...

55

Metadata driven memory optimizations in dynamic binary translator  

Science Conference Proceedings (OSTI)

A dynamic binary translator offers solutions for translating and running source architecture binaries on target architecture at runtime. Regardless of its growing popularity, practical dynamic binary translators usually suffer from the limited optimizations ... Keywords: dynamic binary translator, memory optimizations, metadata

Chaohao Xu; Jianhui Li; Tao Bao; Yun Wang; Bo Huang

2007-06-01T23:59:59.000Z

56

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.

57

Spectral analysis of X-ray binaries  

E-Print Network (OSTI)

In this thesis, I present work from three separate research projects associated with observations of X-ray binaries. Two of those revolve around spectral characteristics of neutron star low-mass X-ray binaries (NS-LMXBs), ...

Fridriksson, Joel Karl

2011-01-01T23:59:59.000Z

58

Binary Cultivation in Photobioreactors - Energy Innovation Portal  

Biomass and Biofuels Advanced Materials Binary ... The processes of photosynthesis and photosynthate conversion into a target product are spatially separated ;

59

Stochastic binary sensor networks for noisy environments  

Science Conference Proceedings (OSTI)

This paper proposes a stochastic framework for detecting anomalies or gathering events of interest in a noisy environment using a network consisting of binary sensors. A binary sensor is an extremely coarse sensor, capable of measuring data to only 1-bit ... Keywords: energy consumption, energy efficiency, noisy environments, sensor networks, simulation, stochastic binary sensors, wireless networks

T. Nguyen; Dong Nguyen; Huaping Liu; Duc A. Tran

2007-07-01T23:59:59.000Z

60

Energy of tsunami waves generated by bottom motion  

E-Print Network (OSTI)

generation models. Theoretical and Computational Fluid Dynamics, 21:245­269, 2007. Z. Kowalik, W. Knight, TEnergy 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

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.


61

Wind Waves and Moveable-Bed Bottom Friction  

Science Conference Proceedings (OSTI)

Effects of moveable-bed bottom friction for wave observations and wave modeling are investigated using a state-of-the-art bottom friction model. This model combines the hydrodynamic friction model of Madsen et al. with a moveable-bed roughness ...

Hendrik L. Tolman

1994-05-01T23:59:59.000Z

62

Aerial Photography At Beowawe Hot Springs Area (Wesnousky, Et...  

Open Energy Info (EERE)

S. John Caskey, John W. Bell (2003) Recency Of Faulting And Neotechtonic Framework In The Dixie Valley Geothermal Field And Other Geothermal Fields Of The Basin And Range Retrieved...

63

Field Mapping At Beowawe Hot Springs Area (Wesnousky, Et Al....  

Open Energy Info (EERE)

S. John Caskey, John W. Bell (2003) Recency Of Faulting And Neotechtonic Framework In The Dixie Valley Geothermal Field And Other Geothermal Fields Of The Basin And Range Retrieved...

64

Bell-Bottoms and Energy Efficient Buildings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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?

65

Antarctic Bottom Water Variability in a Coupled Climate Model  

Science Conference Proceedings (OSTI)

The natural variability of the Weddell Sea variety of Antarctic Bottom Water (AABW) is examined in a long-term integration of a coupled climate model. Examination of passive tracer concentrations suggests that the model AABW is predominantly ...

Agus Santoso; Matthew H. England

2008-09-01T23:59:59.000Z

66

Bottom-up generative modeling of tree-structured data  

Science Conference Proceedings (OSTI)

We introduce a compositional probabilistic model for treestructured data that defines a bottom-up generative process from the leaves to the root of a tree. Contextual state transitions are introduced from the joint configuration of the children to the ...

Davide Bacciu; Alessio Micheli; Alessandro Sperduti

2010-11-01T23:59:59.000Z

67

The Bottom Boundary Layer Over the Northern California Shelf  

Science Conference Proceedings (OSTI)

Moored temperature and shipboard CTD observations from a northern California coastal upwelling region reveal variable bottom mixed-layer heights that are typically 515 m, but occasionally exceed 50 m. Observations from Oregon, northern ...

Steven J. Lentz; John H. Trowbridge

1991-08-01T23:59:59.000Z

68

Corrections to Bottom Pressure Records for Dynamic Temperature Response  

Science Conference Proceedings (OSTI)

Factory calibration of Digiquartz transducers allows for static temperature corrections, assuming that the temperature changes slowly enough during deployment that the gauge is always in thermal equilibrium. Deep ocean bottom pressure recorders ...

Edward F. Boss; Frank I. Gonzlez

1995-08-01T23:59:59.000Z

69

Surges of Antarctic Bottom Water into the North Atlantic  

Science Conference Proceedings (OSTI)

Current meter records show that Antarctic Bottom Water surges into the western North Atlantic with roughly a sixty-day period. A time-dependent mass budget which incorporates estimated volume fluxes from geostrophic calculations, surges with a ...

John A. Whitehead

1989-06-01T23:59:59.000Z

70

Propagation of Barotropic Continental Shelf Waves over Irregular Bottom Topography  

Science Conference Proceedings (OSTI)

Using a geometry which roughly approximates that of a typical continental shelf and slope, the effects of a random bottom topography on free barotropic shelf waves are found. The bathymetric irregularity induces damping of the coherent wave due ...

K. H. Brink

1980-05-01T23:59:59.000Z

71

Effects of Instrumented Bottom Tripods on Process Measurements  

Science Conference Proceedings (OSTI)

The measurement and assessment of ocean bottom processes are important sources of information for understanding bedform evolution and sediment entrainment and for improving numerical models. Instrumented tripods have been used to investigate ...

Rodolfo Bolaos; Laurent O. Amoudry; Ken Doyle

2011-06-01T23:59:59.000Z

72

Interaction of Ocean Waves with a Soft Bottom  

Science Conference Proceedings (OSTI)

Soft muddy bottoms have significant effects on properties of water waves which propagate over them. The wave dispersion equation is modified and wave energy is dissipated by the coupling between the waves in water and those induced in the mud ...

S. V. Hsiao; O. H. Shemdin

1980-04-01T23:59:59.000Z

73

Convectively Driven Mixing in the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

Closely spaced vertical profiles through the bottom boundary layer over a sloping continental shelf during relaxation from coastal upwelling reveal structure that is consistent with convectively driven mixing. Parcels of fluid were observed ...

J. N. Moum; A. Perlin; J. M. Klymak; M. D. Levine; T. Boyd; P. M. Kosro

2004-10-01T23:59:59.000Z

74

Charm and bottom hadronic form factors with QCD sum rules  

Science Conference Proceedings (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

75

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

76

Compact binary mergers: an astrophysical perspective  

E-Print Network (OSTI)

This paper reviews the current understanding of double neutron star and neutron star black hole binaries. It addresses mainly (nuclear) astrophysics aspects of compact binary mergers and thus complements recent reviews that have emphasized the numerical relativity viewpoint. In particular, the paper discusses different channels to release neutron-rich matter into the host galaxy, connections between compact binary mergers and short Gamma-ray bursts and accompanying electromagnetic signals.

S. Rosswog

2010-12-04T23:59:59.000Z

77

Segregation in noninteracting binary mixture  

E-Print Network (OSTI)

Process of stripe formation is analyzed numerically in a binary mixture. The system consists of particles of two sizes, without any direct mutual interactions. Overlapping of large particles, surrounded by a dense system of smaller particles induces indirect entropy driven interactions between large particles. Under an influence of an external driving force the system orders and stripes are formed. Mean width of stripes grows logarithmically with time, in contrast to a typical power law temporal increase observed for driven interacting lattice gas systems. We describe the mechanism responsible for this behavior and attribute the logarithmic growth to a random walk of large particles in a random potential due to the small ones.

Filip Krzyzewski; Magdalena Zaluska-Kotur

2007-08-06T23:59:59.000Z

78

Target tracking with binary proximity sensors  

Science Conference Proceedings (OSTI)

We explore fundamental performance limits of tracking a target in a two-dimensional field of binary proximity sensors, and design algorithms that attain those limits while providing minimal descriptions of the estimated target trajectory. Using geometric ... Keywords: Sensor networks, binary sensing, distributed algorithms, fundamental limits, target tracking

Nisheeth Shrivastava; Raghuraman Mudumbai; Upamanyu Madhow; Subhash Suri

2009-11-01T23:59:59.000Z

79

Mostly static program partitioning of binary executables  

Science Conference Proceedings (OSTI)

We have built a runtime compilation system that takes unmodified sequential binaries and improves their performance on off-the-shelf multiprocessors using dynamic vectorization and loop-level parallelization techniques. Our system, Azure, is purely software ... Keywords: Continuous compilation and optimization, binary translation, dynamic parallelization

Efe Yardimci; Michael Franz

2009-06-01T23:59:59.000Z

80

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

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

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

82

Numerical Investigations of Kuiper Belt Binaries  

E-Print Network (OSTI)

Observations of the Kuiper Belt indicate that a larger than expected percentage of KBO's (approximately 8 out of 500) are in binary pairs. The formation and survival of such objects presents a conundrum [1]. Two competing theories have been postulated to try to solve this problem. One entails the physical collision of bodies [2] while the other utilizes dynamical friction or a third body to dissipate excess momentum and energy from the system [3]. Although in general known binaries tend to differ significantly in mass, such as seen in the Earth-Moon or asteroid binary systems [4], Kuiper binaries discovered to date tend to instead be of similar size [5, 6]. This paper investigates the stability, development and lifetimes for Kuiper Belt binaries by tracking their orbital dynamics and subsequent evolution. Section two details the numerical model while Section three discusses the initial conditions. Finally, in Section four the results are discussed with Section five containing the conclusions.

R. C. Nazzario; T. W. Hyde

2005-01-20T23:59:59.000Z

83

Binary central stars of planetary nebulae  

E-Print Network (OSTI)

Abstract. Only a handful of binary central stars of planetary nebulae (PNe) are known today, due to the difficulty of detecting their companions. Preliminary results from radial velocity surveys, however, seem to indicate that binarity plays a fundamental, rather than marginal role in the evolution of PNe and that the close binary fraction might be much larger than the currently known value of 10-15%. In this review, we list all the known binary central stars, giving an updated census of their numbers and selected characteristics. A review is also given of the techniques used to detect binaries as well as selected characteristics of related stellar classes which might provide constraints (or additional puzzles) to the theory of PN evolution. Finally, we will formulate the conjecture that all PNe derive from binary interactions and suggest that this is not inconsistent with our current knowledge. 1.

Orsola De Marco

2006-01-01T23:59:59.000Z

84

Changes related to "A Flashing Binary Combined Cycle For Geothermal...  

Open Energy Info (EERE)

Twitter icon Changes related to "A Flashing Binary Combined Cycle For Geothermal Power Generation" A Flashing Binary Combined Cycle For Geothermal Power Generation...

85

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

86

Analytic Results for Higgs Production in Bottom Fusion  

E-Print Network (OSTI)

We evaluate analytically the cross section for Higgs production plus one jet through bottom quark fusion. By considering the small pT limit we derive expressions for the resummation coefficients governing the structure of large logarithms, and compare these expressions with those available in the literature.

Kemal J. Ozeren

2010-10-14T23:59:59.000Z

87

Antarctic Bottom Water Flux in the Equatorial Western Atlantic  

Science Conference Proceedings (OSTI)

A moored array at the equator in the western basin of the Atlantic provides a 604-day time series of abyssal currents and temperatures spanning the full breadth of the Antarctic Bottom Water (AABW) flowing from the Brazil Basin to the Guiana ...

Melinda M. Hall; Michael McCartney; J. A. Whitehead

1997-09-01T23:59:59.000Z

88

The Influence of Bottom Topography on Baroclinic Transports  

Science Conference Proceedings (OSTI)

A new and reduced set of governing equations is proposed for the modeling of baroclinic motions in a two-layer system with variable bottom topography. The reduction of the equations, which eliminates all barotropic is based on the assumption of ...

Benoit Cushman-Roisin; James J. O'Brien

1983-09-01T23:59:59.000Z

89

Deep-Ocean Bottom Pressure Measurements in the Northeast Pacific  

Science Conference Proceedings (OSTI)

Pressure transducers with quartz-crystal resonators are being used to measure deep-ocean bottom pressure in the northeast Pacific as part of a long-term monitoring program. In principal, instrument sensitivity is less than 1 mm for sea-level ...

M. C. Eble; F. I. Gonzalez

1991-04-01T23:59:59.000Z

90

Deep-Ocean Bottom Pressure Measurement: Drift Removal and Performance  

Science Conference Proceedings (OSTI)

Sixteen records from seven Digiquartz deep-ocean bottom pressure sensors have been in deployments of 312 month duration under the Gulf Stream in depths of 3300 to 4400 m. Particular attention is given (i) to characterizing any observed drift in ...

D. Randolph Watts; Harilaos Kontoyiannis

1990-04-01T23:59:59.000Z

91

The Bottom Boundary Layer in the Eastern Tropical Pacific  

Science Conference Proceedings (OSTI)

Vertical and horizontal structure of near-bottom currents at two locations in the eastern tropical Pacific (926?N, 15117?W; 1438?N, 12529?W) have been studied. Low-frequency currents at these sites, located in a region of abyssal hills, ...

S. P. Hayes

1980-03-01T23:59:59.000Z

92

Antarctic Bottom Water Flow through the Hunter Channel  

Science Conference Proceedings (OSTI)

The Rio Grande Rise acts as a natural barrier for the equatorward flow of Antarctic Bottom Water in the subtropical South Atlantic. In addition to the Vema Channel, the Hunter Channel cuts through this obstacle and offers a separate route for ...

Walter Zenk; Gerold Siedler; Bernd Lenz; Nelson G. Hogg

1999-11-01T23:59:59.000Z

93

Solving Non-binary CSPs Using the Hidden Variable Encoding  

Science Conference Proceedings (OSTI)

Non-binary constraint satisfaction problems (CSPs) can be solved in two different ways. We can either translate the problem into an equivalent binary one and solve it using well-established binary CSP techniques or use extended versions of binary techniques ...

Nikos Mamoulis; Kostas Stergiou

2001-11-01T23:59:59.000Z

94

Monolithic Active Pixel Matrix with Binary Counters (MAMBO) ASIC  

SciTech Connect

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

95

On target tracking with binary proximity sensors  

Science Conference Proceedings (OSTI)

We consider the use of binary proximity sensors for tracking targets. Such sensors provide only 1-bit information regarding a target's presence or absence in their vicinity, albeit with less than 100% reliability. A novel tracking method employing such ...

Wooyoung Kim; Kirill Mechitov; Jeung-Yoon Choi; Soo Ham

2005-04-01T23:59:59.000Z

96

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

97

Binary distillation column design using mathematica  

Science Conference Proceedings (OSTI)

The accurate design of distillation columns is a very important topic in chemical industry. In this paper, we describe a Mathematica program for the design of distillation columns for binary mixtures. For simplicity, it is assumed that the columns are ...

Akemi Glvez; Andrs Iglesias

2003-06-01T23:59:59.000Z

98

ROTATIONAL DOPPLER BEAMING IN ECLIPSING BINARIES  

SciTech Connect

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

99

Categorical Exclusion Determinations: B5.1 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

100

Analysis of binary vapor turbines  

DOE Green Energy (OSTI)

The effect the binary mixture has on the turbine is examined in terms of design and cost. Several flow theories for turbines and turbine blading are reviewed. The similarity method, which uses dimensionless parameters, is used in determining rotative speeds and diameters for a variety of inlet temperatures and exit pressures. It is shown that the ratio of exit to inlet specific volume for each component in the mixture is the same for each specie. The specific volume ratio constraints are combined with the temperature equalities, the condenser pressure, and the total inlet entropy to form the constraints necessary to determine the exit state uniquely in an isentropic expansion. The non-isentropic exit state is found in a similar manner. The expansion process is examined for several cases and compared with the expansion of a single component vapor. Finally, in order to maintain high efficiency and to meet the criteria which makes the similarity method valid at high inlet temperatures, turbine multistaging is examined and a sample case is given for a two stage turbine.

Bliss, R.W.; Boehm, R.F.; Jacobs, H.R.

1976-12-01T23:59:59.000Z

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.


101

Binary module test. Final report  

DOE Green Energy (OSTI)

The objective of this project was to design and test a binary loop module representative of and scaleable to commercial size units. The design was based on state-of-the-art heat exchanger technology, and the purpose of the tests was to confirm performance of a supercritical boiling cycle using isobutane and a mixture of isobutane and isopentane as the secondary working fluid. The module was designed as one percent of a 50 MW unit. It was installed at Magma Power's East Mesa geothermal field and tested over a period of approximately 4 months. Most of the test runs were with isobutane but some data were collected for hydrocarbon mixtures. The results of the field tests are reported. In general these results indicate reasonably good heat balances and agreement with overall heat transfer coefficients calculated by current stream analysis methods and available fluid property data; however, measured pressure drops across the heat exchangers were 20 percent higher than estimated. System operation was stable under all conditions tested.

Schilling, J.R.; Colley, T.C.; Pundyk, J.

1980-12-01T23:59:59.000Z

102

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":""}]}

103

Donor solvent coal liquefaction with bottoms recycle at elevated pressure  

DOE Patents (OSTI)

An improved process for liquefying solid carbonaceous materials wherein increased naphtha yields are achieved by effecting the liquefaction at a pressure within the range from about 1750 to about 2800 psig in the presence of recycled bottoms and a hydrogen-donor solvent containing at least 0.8 wt % donatable hydrogen. The liquefaction is accomplished at a temperature within the range from about 700.degree. to about 950.degree. F. The coal:bottoms ratio in the feed to liquefaction will be within the range from about 1:1 to about 5:1 and the solvent or diluent to total solids ratio will be at least 1.5:1 and preferably within the range from about 1.6:1 to about 3:1. The yield of naphtha boiling range materials increases as the pressure increases but generally reaches a maximum at a pressure within the range from about 2000 to about 2500 psig.

Bauman, Richard F. (Houston, TX); Taunton, John W. (Seabrook, TX); Anderson, George H. (Houston, TX); Trachte, Ken L. (Baytown, TX); Hsia, Steve J. (Friendswood, TX)

1982-01-01T23:59:59.000Z

104

Biphase turbine bottoming cycle for a diesel engine  

SciTech Connect

Application of a two-phase turbine system to waste heat recovery was examined. Bottoming cycle efficiencies ranging from 15 to 30% were calculated for a 720/sup 0/F diesel exhaust temperature. A single stage demonstration unit, designed for non-toxic fluids (water and DowTherm A) and for atmospheric seals and bearings, had a cycle efficiency of 23%. The net output power was 276 hp at 8,100 rpm, increasing the total shaft power from 1,800 hp for the diesel alone, to 2,076 hp for the combined system. A four stage organic turbine, for the same application, had a rotational speed of 14,700 rpm while a four stage steam turbine had 26,000 rpm. Fabrication drawings were prepared for the turbine and nozzle. The major improvement leading to higher cycle efficiency and lower turbine rpm was found to be the use of a liquid component with lower sensible heat. A reduction in capital cost was found to result from the use of a contact heat exchanger instead of tube-fin construction. The cost for a contact heat exchanger was only $35-52/kWe compared to $98/kWe for a tube-fin heat exchanger. Design drawings and materials list were prepared. A program resulting in the demonstration of a two-phase bottoming system was planned and the required cost estimated. The program would result in a feasibility test of the nozzle and turbine at the end of the first year, a laboratory performance test of the bottoming system by the end of the second year and a field demonstration test and laboratory endurance test of the bottoming system during the third year. The blowdown test rig for the first year's program and test turbine were designed.

Ahmad, S.; Hays, L.

1977-02-15T23:59:59.000Z

105

Higgs Boson Resummation via Bottom-Quark Fusion  

E-Print Network (OSTI)

The region of small transverse momentum in q-qbar- and gg-initiated processes must be studied in the framework of resummation to account for the large, logarithmically-enhanced contributions to physical observables. In this letter, we study resummed differential cross-sections for Higgs production via bottom-quark fusion. We find that the differential distribution peaks at approximately 15 GeV, a number of great experimental importance to measuring this production channel.

B. Field

2004-07-21T23:59:59.000Z

106

Underwater-cable power-transmission system: bottom segment design  

DOE Green Energy (OSTI)

After a survey of the state of the art for bottom cables, some possible configurations are considered for candidate OTEC sites. General considerations on laying and embedding are discussed, and solutions are considered. Optimization of cable dimensions and the problem of flexible joints are covered. The state of the art of cable installation and repair is reviewed and discussed with reference to the representative OTEC sites. Costs for shore terminal stations are evaluated. (LEW)

Not Available

1978-11-01T23:59:59.000Z

107

Boundary Layer under Near-Inertial Internal Waves over a Critically Sloping Bottom  

Science Conference Proceedings (OSTI)

Internal waves reflecting off sloping bottoms have been shown to have boundary-layer scales proportional to ? (? is viscosity). As the characteristic slope of the wave approaches the slope of the bottom, the boundary-layer scale increases ...

R. Lee Gordon

1980-07-01T23:59:59.000Z

108

Top-Down, Bottom-Up Diffusion Experiments in a Water Convection Tank  

Science Conference Proceedings (OSTI)

Large-eddy simulation (LES) results indicate that turbulent scalar diffusion in the convective atmospheric boundary layer (CBL) has interesting properties. A scalar introduced into the bottom of the CBL with no flux through the top (bottom-up ...

M. Piper; J. C. Wyngaard; W. H. Snyder; R. E. Lawson Jr.

1995-10-01T23:59:59.000Z

109

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

110

An Embedded Bottom Boundary Layer Formulation for Z-Coordinate Ocean Models  

Science Conference Proceedings (OSTI)

An embedded bottom boundary layer (EBBL) scheme is developed to improve the bottom topographic representation in z-coordinate ocean general circulation models. The EBBL scheme is based on the combined techniques of an embedded topography-...

Y. Tony Song; Yi Chao

2000-04-01T23:59:59.000Z

111

Asymmetric Behavior of an Oceanic Boundary Layer above a Sloping Bottom  

Science Conference Proceedings (OSTI)

The effects of stratification, planetary rotation and a sloping bottom combine to produce an asymmetric response in which the characteristics of an oceanic bottom boundary layer depend on the direction, in addition to the magnitude, of the along-...

J. H. Trowbridge; S. J. Lentz

1991-08-01T23:59:59.000Z

112

Bottom Stress Estimates from Vertical Dissipation Rate Profiles on the Continental Shelf  

Science Conference Proceedings (OSTI)

Measurements of the near-bottom distribution of the turbulent dissipation rate on the continental shelf west of Vancouver Island are used to calculate bottom stress. A free-failing vertical profiler with microstructure shear probes was used to ...

Richard K. Dewey; William R. Crawford

1988-08-01T23:59:59.000Z

113

Bottom Temperatures Related to Gulf Stream Displacement off the Southeast United States Shelf  

Science Conference Proceedings (OSTI)

Bottom temperature time series recorded beneath the Gulf Stream at 265 and 589 m depth off the Georgia coast are compared with simultaneous time series of main thermocline depth determined from inverted echo sounder and bottom pressure gauge ...

Li Li; Mark Wimbush

1985-03-01T23:59:59.000Z

114

Global Contraction of Antarctic Bottom Water between the 1980s and 2000s  

Science Conference Proceedings (OSTI)

A statistically significant reduction in Antarctic Bottom Water (AABW) volume is quantified between the 1980s and 2000s within the Southern Ocean and along the bottom-most, southern branches of the meridional overturning circulation (MOC). AABW ...

Sarah G. Purkey; Gregory C. Johnson

2012-09-01T23:59:59.000Z

115

Investigating Dark Energy with Black Hole Binaries  

E-Print Network (OSTI)

The accelerated expansion of the universe is ascribed to the existence of dark energy. Black holes accretion of dark energy induces a mass change proportional to the energy density and pressure of the background dark energy fluid. The time scale during which the mass of black holes changes considerably is too long relative to the age of the universe, thus beyond detection possibilities. We propose to take advantage of the modified black hole masses for exploring the equation of state $w[z]$ of dark energy, by investigating the evolution of supermassive black hole binaries on a dark energy background. Deriving the signatures of dark energy accretion on the evolution of binaries, we find that dark energy imprints on the emitted gravitational radiation and on the changes in the orbital radius of the binary can be within detection limits for certain supermassive black hole binaries. In this talk I describe how binaries can provide a useful tool in obtaining complementary information on the nature of dark energy, based on the work done with A.Kelleher.

Laura Mersini-Houghton; Adam Kelleher

2009-06-08T23:59:59.000Z

116

Modeling Flows Around Merging Black Hole Binaries  

E-Print Network (OSTI)

Coalescing massive black hole binaries are produced by the mergers of galaxies. The final stages of the black hole coalescence produce strong gravitational radiation that can be detected by the space-borne LISA. In cases where the black hole merger takes place in the presence of gas and magnetic fields, various types of electromagnetic signals may also be produced. Modeling such electromagnetic counterparts of the final merger requires evolving the behavior of both gas and fields in the strong-field regions around the black holes. We have taken a step towards solving this problem by mapping the flow of pressureless matter in the dynamic, 3-D general relativistic spacetime around the merging black holes. We find qualitative differences in collision and outflow speeds, including a signature of the merger when the net angular momentum of the matter is low, between the results from single and binary black holes, and between nonrotating and rotating holes in binaries. If future magnetohydrodynamic results confirm ...

van Meter, James R; Miller, M Coleman; Reynolds, Christopher S; Centrella, Joan M; Baker, John G; Boggs, William D; Kelly, Bernard J; McWilliams, Sean T

2009-01-01T23:59:59.000Z

117

A Bottom-Up Approach to SUSY Analyses  

SciTech Connect

This paper proposes a new way to do event generation and analysis in searches for new physics at the LHC. An abstract notation is used to describe the new particles on a level which better corresponds to detector resolution of LHC experiments. In this way the SUSY discovery space can be decomposed into a small number of eigenmodes each with only a few parameters, which allows to investigate the SUSY parameter space in a model-independent way. By focusing on the experimental observables for each process investigated the Bottom-Up Approach allows to systematically study the boarders of the experimental efficiencies and thus to extend the sensitivity for new physics.

Horn, Claus; /SLAC

2011-11-11T23:59:59.000Z

118

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

119

Gas turbine bottoming cycles: Triple-pressure steam versus Kalina  

SciTech Connect

The performance of a triple-pressure steam cycle has been compared with a single-stage Kalina cycle and an optimized three-stage Kalina cycle as the bottoming sections of a gas turbine combined cycle power plant. A Monte Carlo direct search was used to find the optimum separator temperature and ammonia mass fraction for the three-stage Kalina cycle for a specific plant configuration. Both Kalina cycles were more efficient than the triple pressure steam cycle. Optimization of the three-stage Kalina cycle resulted in almost a two percentage point improvement.

Marston, C.H. [Villanova Univ., PA (United States); Hyre, M. [Massachusetts Inst. of Technology, Cambridge, MA (United States)

1995-01-01T23:59:59.000Z

120

Auto-correlation of Binary stars  

E-Print Network (OSTI)

Speckle interferometric technique is used to record a series of short exposure images of several close binary stars with sub-arcsecond separation through a narrow band filter centred at H$\\alpha$ at the Cassegrain focus of the 2.34 meter Vainu Bappu telescope (VBT), situated at Vainu Bappu Observatory (VBO), Kavalur. The auto-correlation method is developed under Image Reduction Analysis Facility (IRAF). Wiener filter is included in the programme to eliminate spurious high frequency contributions; a few sets of data provide the optimised results. The auto-correlated image of these stars gives the separation of the binary components.

S. K. Saha; D. Maitra

2001-06-07T23:59:59.000Z

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

Speckle interferometric observations of close binary stars  

E-Print Network (OSTI)

Speckle interferometric technique is employed to record a series of hundreds of short-exposure images of several close binary stars with sub-arcsecond separation through a narrow band filter at the Cassegrain focus of the 2.34 meter (m) Vainu Bappu telescope (VBT), situated at Vainu Bappu Observatory (VBO), Kavalur, India. The data are recorded sequentially by a Peltier-cooled intensified CCD camera with 10 ms exposure. The auto-correlation method is applied to determine the angular separations and position angles of these binary systems.

S. K. Saha; V. Chinnappan; L. Yeswanth; P. Anbazhagan

2002-09-20T23:59:59.000Z

122

Simple reconstruction of binary near-perfect phylogenetic trees  

Science Conference Proceedings (OSTI)

We consider the problem of reconstructing near-perfect phylogenetic trees using binary character states (referred to as BNPP). A perfect phylogeny assumes that every character mutates at most once in the evolutionary tree, yielding an algorithm for binary ...

Srinath Sridhar; Kedar Dhamdhere; Guy E. Blelloch; Eran Halperin; R. Ravi; Russell Schwartz

2006-05-01T23:59:59.000Z

123

Time distribution analysis for binary search of a linked list  

Science Conference Proceedings (OSTI)

The aim of this article is to determine the probability distribution of sorting time for different sized linked lists utilizing binary search method and its comparison with results for sequential and binary tree search methods. In [1] the concept of ...

Firooz Khosraviyani; Mohammad H. Moadab; Douglas F. Hale

1991-11-01T23:59:59.000Z

124

Assembly of a Molecular Needle, from the Bottom Up  

NLE Websites -- All DOE Office Websites (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.

125

Impacts of Bottom Trawling on Underwater Cultural Heritage  

E-Print Network (OSTI)

The fishing method of trawling, or dragging, has long been shown to be harmful to a plethora of sea life inhabiting the world?s oceans and inland waterways. Fishing nets scour the seabed, disturbing everything in their path, while usually in search of only one type of bottom-dwelling species. Impacts to the seafloor include a removal of topographic features, disturbance of the upper sediment layers, including deep furrows, as well as physical and chemical changes to sediment morphology. While biological organisms and communities can potentially recover from this destruction, archaeological data cannot. Fishermen have been raising important artifacts in their nets for over a century. These finds have helped archaeologists locate significant sites, but they also have the adverse effect of irreparably damaging these sites. This thesis explores the impacts of bottom trawling on underwater cultural heritage. The methods and gear used by trawlers and their documented effects upon the sea floor are identified. Examples of the types of damage shipwreck sites receive after being impacted by trawling are presented. Instances where fishermen have raised prehistoric artifacts from inundated land sites are also introduced. The fishing and archaeological communities must cooperate to limit further damage to underwater cultural heritage around the globe.

Atkinson, Christopher

2012-05-01T23:59:59.000Z

126

Proteomics by FTICR Mass Spectrometry: Top Down and Bottom Up  

SciTech Connect

This review offers a broad overview of recent FTICR applications and technological developments in the field of proteomics, directed to a variety of people with different expertise and interests. Both the ''bottom-up'' (peptide level) and ''top-down'' (intact protein level) approaches will be covered and various related aspects will be discussed and illustrated with examples that are among the best available references in the literature. ''Bottom-up topics include peptide fragmentation, the AMT approach and DREAMS technology, quantitative proteomics, post-translational modifications, and special FTICR software focused on peptide and protein identification. Topics in the ''top-down'' part include various aspects of high-mass measurements, protein tandem mass spectrometry, protein confirmations, protein-protein complexes, as well as some esoteric applications that may become more practical in the coming years. Finally, examples of integrating both approaches and medical proteomics applications using FTICR will be provided, closing with an outlook of what may be coming our way sooner than later.

Bogdanov, Bogdan; Smith, Richard D.

2005-03-31T23:59:59.000Z

127

Thin Film Si Bottom Cells for Tandem Device Structures: Final Technical Report, 15 December 2003 - 15 October 2007  

DOE Green Energy (OSTI)

GIT and IEC developed thin-film Si bottom cell and showed that deposition of top cell in tandem device did not reduce bottom cell performance.

Yelundur, V.; Hegedus, S.; Rohatgi, A.; Birkmire, R.

2008-11-01T23:59:59.000Z

128

Control of binary distillation column using fuzzy PI controllers  

Science Conference Proceedings (OSTI)

In this paper the automatic control of a binary distillation column is described. This control is done with fuzzy logic controllers. After a short explanation of the function and dynamic of a binary distillation column, it's operating and control strategies ... Keywords: binary distillation column, fuzzy inference system, simulation

Shahram Javadi; Jabber Hosseini

2009-08-01T23:59:59.000Z

129

Accretion Processes in BlackHole Binaries  

E-Print Network (OSTI)

Accretion Processes in Black­Hole Binaries Roberto Soria A thesis submitted for the degree presented in ``Measuring the Mass of the Black Hole in GRO J1655\\Gamma40'', Soria, R., Wickramasinghe, D. T processes in black­hole bina­ ries, theoretically and observationally, focussing on the role of outflows

Soria, Roberto

130

Improving the efficiency of binary cycles  

SciTech Connect

The performance of binary geothermal power plants can be improved through the proper choice of a working fluid, and optimization of component designs and operating conditions. This paper summarizes the investigations at the Idaho National Engineering Laboratory (INEL) which are examining binary cycle performance improvements for moderate temperature (350 to 400 F) resources. These investigations examine performance improvements resulting from the supercritical vaporization and countercurrent integral condensation of mixed hydrocarbon working fluids, as well as the modification of the turbine inlet state points to achieve supersaturated turbine vapor expansions. For resources, with the brine outlet temperature restricted, the use of turbine exhaust recuperators is examined. The reference plant used to determine improvements in plant performance in these studies operates at conditions similar to the 45 MW Heber binary plant. The brine effectiveness (watt-hours per pound of brine) is used as an indicator for improvements in performance. The performance of the binary cycle can be improved by 25 to 30% relative to the reference plant through the selection of the optimum working fluids and operating conditions, achieving countercurrent integral condensation, and allowing supersaturated vapor expansions in the turbine. 9 refs., 5 figs.

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

1988-01-01T23:59:59.000Z

131

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

132

Using binary search on a linked list  

Science Conference Proceedings (OSTI)

In this article a variation of binary search applicable to a linked list structure is examined. There are no additional data structure properties imposed on the list; that is the list may be singly or multiply linked, but it is not required that the ...

Firooz Khosraviyani

1990-08-01T23:59:59.000Z

133

On binary Kloosterman sums divisible by 3  

Science Conference Proceedings (OSTI)

By counting the coset leaders for cosets of weight 3 of the Melas code we give a new proof for the characterization of Kloosterman sums divisible by 3 for Keywords: 11L05, 11T71, 94B15, Binary Kloosterman sum, Cap, Melas code, Nonlinear function

Kseniya Garaschuk; Petr Lison?k

2008-12-01T23:59:59.000Z

134

Modeling Flows Around Merging Black Hole Binaries  

E-Print Network (OSTI)

Coalescing massive black hole binaries are produced by the mergers of galaxies. The final stages of the black hole coalescence produce strong gravitational radiation that can be detected by the space-borne LISA. In cases where the black hole merger takes place in the presence of gas and magnetic fields, various types of electromagnetic signals may also be produced. Modeling such electromagnetic counterparts of the final merger requires evolving the behavior of both gas and fields in the strong-field regions around the black holes. We have taken a step towards solving this problem by mapping the flow of pressureless matter in the dynamic, 3-D general relativistic spacetime around the merging black holes. We find qualitative differences in collision and outflow speeds, including a signature of the merger when the net angular momentum of the matter is low, between the results from single and binary black holes, and between nonrotating and rotating holes in binaries. If future magnetohydrodynamic results confirm these differences, it may allow assessment of the properties of the binaries as well as yielding an identifiable electromagnetic counterpart to the attendant gravitational wave signal.

James R. van Meter; John H. Wise; M. Coleman Miller; Christopher S. Reynolds; Joan M. Centrella; John G. Baker; William D. Boggs; Bernard J. Kelly; Sean T. McWilliams

2009-07-31T23:59:59.000Z

135

Binary power multiplier for electromagnetic energy  

DOE Patents (OSTI)

A technique for converting electromagnetic pulses to higher power amplitude and shorter duration, in binary multiples, splits an input pulse into two channels, and subjects the pulses in the two channels to a number of binary pulse compression operations. Each pulse compression operation entails combining the pulses in both input channels and selectively steering the combined power to one output channel during the leading half of the pulses and to the other output channel during the trailing half of the pulses, and then delaying the pulse in the first output channel by an amount equal to half the initial pulse duration. Apparatus for carrying out each of the binary multiplication operation preferably includes a four-port coupler (such as a 3 dB hybrid), which operates on power inputs at a pair of input ports by directing the combined power to either of a pair of output ports, depending on the relative phase of the inputs. Therefore, by appropriately phase coding the pulses prior to any of the pulse compression stages, the entire pulse compression (with associated binary power multiplication) can be carried out solely with passive elements.

Farkas, Zoltan D. (203 Leland Ave., Menlo Park, CA 94025)

1988-01-01T23:59:59.000Z

136

Session 9: Heber Geothermal Binary Demonstration Project  

DOE Green Energy (OSTI)

The Heber Binary Project had its beginning in studies performed for the Electric Power Research Institute (EPRI), which identified the need for commercial scale (50 Mw or larger) demonstration of the binary cycle technology. In late 1980, SDG&E and the Department of Energy (DOE) signed a Cooperative Agreement calling for DOE to share in 50 percent of the Project costs. Similarly, SDG&E signed Project participation agreements with EPRI, the Imperial Irrigation District, California Department of Water Resources, and Southern California Edison Company, which provided the remaining 50 percent of the required funding. In 1982, the State of California also joined the Project. The objectives of the Heber Binary Project are to demonstrate the potential of moderate-temperature (below 410 F) geothermal energy to produce economic electric power with binary cycle conversion technology, and to establish schedule, cost and equipment performance, reservoir performance, and the environmental acceptability of such plants. The plant will be the first large-scale power generating facility in the world utilizing the binary conversion process, and it is expected that information resulting from this Project will be applicable to a wide range of moderate-temperature hydrothermal reservoirs, which represent 80 percent of geothermal resources in the United States. To accomplish the plant engineering, design, and equipment procurement, SDG&E has hired Fluor Engineers, Inc., Power Division, of Irvine, California. In early 1982, SDG&E contracted for construction management services with Dravo Constructors, Inc. (DCI) of New York. DCI is responsible for casting the Fluor design into construction packages, letting the construction contracts, and overseeing the construction in the field.

Allen, Richard F.; Nelson, Tiffany T.

1983-12-01T23:59:59.000Z

137

Bottom/Side Lift Gantry Conceptual Design Rev. 01  

SciTech Connect

The purpose of this task is to update the existing bottom/side lift gantry analysis so that the design is consistent with Enhanced Design Alternative II (EDA II) design constraints listed in the Monitored Geologic Repository Project Description Document (CRWMS M and O 1999a, Section 2.2.1.1, p. 9a). This update is consistent with the requirements of the Technical Guidance Document for License Application Preparation (YMP 1999, Section 6.2.5.1). This update will also take into account the latest available equipment classification and Waste Emplacement/Retrieval System Description Document (SDD) (CRWMS M and O 2000c) requirements. The principal objective of this analysis is to verify that the newly developed bottom/side lift gantry concept continues to be a suitable design concept for the current Monitored Geologic Repository (MGR) design. This analysis includes an examination of the waste package (WP) transfer operation at the emplacement drift transfer dock. In addition, this analysis verifies that the gantry is compatible with the WP transporter, which has been redesigned to handle WPs sitting on pallets (CRWMS M and O 2000a). The scope of this work is to examine the existing analysis and to determine what, if any, modifications to the analysis may be required as a result of additional requirements imposed by the EDA II concept. Then, a revision will be made to the conceptual design accordingly. The analysis will also be revised to show the approximate sizes and locations of the electrical equipment and control cabinets, and to take into account the weight of that equipment in the total gantry weight. The analytical portions of the analysis are revised, as required, to address changes resulting from modifications to the conceptual design or from changes in classification and/or SDD requirements. Finally, the revised conceptual design is evaluated to verify that it continues to be a suitable method for handling the WPs within the emplacement drift. Except as noted, the scope of this work does not include any new analytical investigations or any detailed studies regarding the mechanical or electrical subsystems of the gantry beyond those in Revision 00 of this analysis. This analysis has been prepared in accordance with the requirements set forth in Bottom/Side Lift Gantry Analysis (CRWMS M and O 1999b). This analysis supports the MGR design that will be presented as part of the Site Recommendation.

Bair, P.S.

2000-04-11T23:59:59.000Z

138

Reach the Bottom Line of the Sbottom Search  

SciTech Connect

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

139

GRAVITY DARKENING AND BRIGHTENING IN BINARIES  

SciTech Connect

We apply a von Zeipel gravity darkening model to corotating binaries to obtain a simple, analytical expression for the emergent radiative flux from a tidally distorted primary orbiting a point-mass secondary. We adopt a simple Roche model to determine the envelope structure of the primary, assumed massive and centrally condensed, and use the results to calculate the flux. As for single rotating stars, gravity darkening reduces the flux along the stellar equator of the primary, but, unlike for rotating stars, we find that gravity brightening enhances the flux in a region around the stellar poles. We identify a critical limiting separation beyond which hydrostatic equilibrium no longer is possible, whereby the flux vanishes at the point on the stellar equator of the primary facing the companion. For equal-mass binaries, the total luminosity is reduced by about 13% when this limiting separation is reached.

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

2012-06-20T23:59:59.000Z

140

Automated pupil remapping with binary optics  

DOE Patents (OSTI)

Methods and apparatuses for pupil remapping employing non-standard lenslet shapes in arrays; divergence of lenslet focal spots from on-axis arrangements; use of lenslet arrays to resize two-dimensional inputs to the array; and use of lenslet arrays to map an aperture shape to a different detector shape. Applications include wavefront sensing, astronomical applications, optical interconnects, keylocks, and other binary optics and diffractive optics applications.

Neal, Daniel R. (Tijeras, NM); Mansell, Justin (Albuquerque, NM)

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.
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to obtain the most current and comprehensive results.


141

The Leaching Behavior of Heavy Metals in MSWI Bottom Ash ... - TMS  

Science Conference Proceedings (OSTI)

May 1, 2007 ... The Leaching Behavior of Heavy Metals in MSWI Bottom Ash by Carbonation Reaction with Diffeent Water Content by Nam-Il Um, Kwang-Suk...

142

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...

143

A Bottom-Up Model to Estimate the Energy Efficiency Improvement...  

NLE Websites -- All DOE Office Websites (Extended Search)

Efficiency Improvement and CO2 Emission Reduction Potentials in the Chinese Iron and Steel Industry Title A Bottom-Up Model to Estimate the Energy Efficiency Improvement and...

144

ORBITAL EVOLUTION OF COMPACT WHITE DWARF BINARIES  

SciTech Connect

The newfound prevalence of extremely low mass (ELM, M{sub He} < 0.2 M{sub Sun }) helium white dwarfs (WDs) in tight binaries with more massive WDs has raised our interest in understanding the nature of their mass transfer. Possessing small (M{sub env} {approx} 10{sup -3} M{sub Sun }) but thick hydrogen envelopes, these objects have larger radii than cold WDs and so initiate mass transfer of H-rich material at orbital periods of 6-10 minutes. Building on the original work of D'Antona et al., we confirm the 10{sup 6} yr period of continued inspiral with mass transfer of H-rich matter and highlight the fact that the inspiraling direct-impact double WD binary HM Cancri likely has an ELM WD donor. The ELM WDs have less of a radius expansion under mass loss, thus enabling a larger range of donor masses that can stably transfer matter and become a He mass transferring AM CVn binary. Even once in the long-lived AM CVn mass transferring stage, these He WDs have larger radii due to their higher entropy from the prolonged H-burning stage.

Kaplan, David L. [Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (United States); Bildsten, Lars [Kavli Institute for Theoretical Physics and Department of Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States); Steinfadt, Justin D. R., E-mail: kaplan@uwm.edu, E-mail: bildsten@kitp.ucsb.edu, E-mail: jdrsteinfadt@gmail.com [Department of Physics, Broida Hall, University of California, Santa Barbara, CA 93106 (United States)

2012-10-10T23:59:59.000Z

145

Integrating health impact assessment into the triple bottom line concept  

SciTech Connect

This theoretical study explores the links between the Triple Bottom Line (TBL) concept and the principles of HIA and considers the potential role of HIA to provide a mechanism for integrating health concerns within a broader agenda of government and business. TBL is a framework linked to the broader sustainability agenda that underpins and reviews environmental, economic and social performance of organizations. In its simplest form, TBL acts as a tool for reporting to stakeholders/shareholders organizational performance and the nature of the impacts on the community. The links to HIA are clear as both seek to determine the impact (potential and actual) on the health and well-being of the population. The study found that TBL can operate at four levels within organizations ranging from reporting through to full integration with the organization's goals and practices. Health is narrowly defined and there are tensions about how to undertake the social accountability functions. The study shows the potential role for HIA within the broader policy and accountability agenda. As health is one of the main outcomes of an organization's activities it needs to be taken into account at all levels of activity.

Mahoney, Mary; Potter, Jenny-Lynn

2004-02-01T23:59:59.000Z

146

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

147

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, P.L.; Williams, M.C.; Parsons, E.L.

1993-12-31T23:59:59.000Z

148

Bulk heating cleans paraffinic bottoms from crude tanks  

SciTech Connect

It is often challenging to remove from service crude oil tanks that have been in use for many years. Bulk heating, as opposed to localized heating, has been used to successfully liquefy heavy paraffinic or asphaltic bases in crude oil tanks. The process provides economical product recovery, while minimizing waste production and reducing human exposure to hazardous working conditions. Statia Terminals Point Tupper Inc., Point Tupper, N.S., used bulk heating to remove 2 ft of weathered, paraffinic tank bottoms from six 450,000 bbl tanks that held Cabinda crude from West Africa. Immersion tube heaters were installed through the tank manholes and a diluent was added. Two 10-million BTU/hr propane burners supplied heat, and tank mixers operated continuously to aid in heat transfer. The tank contents were heated to 135 F and the temperature was held constant for 3 days. The resulting hot liquid was a pumpable and recoverable product. About 10 days were required to clean each tank. The paper describes the heating and cleaning operation as well as the economics of the Statia project.

Badrock, J. (Cooperheat Inc., Houston, TX (United States)); Coutu, R. (Cooperheat Inc., Mississauga, Ontario (Canada)); Johnson, N. (Statia Terminals N.V. St. Eustatius (Netherlands)); Martin, A. (Chicago Bridge and Iron Co., Oak Brook, IL (United States))

1995-02-20T23:59:59.000Z

149

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

150

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. 1 fig.

Micheli, P.L.; Williams, M.C.; Parsons, E.L.

1995-09-12T23:59:59.000Z

151

Candidate spectroscopic binaries in the Sloan Digital Sky Survey  

E-Print Network (OSTI)

We have examined the radial velocity data for stars spectroscopically observed by the Sloan Digital Sky Survey (SDSS) more than once to investigate the incidence of spectroscopic binaries, and to evaluate the accuracy of the SDSS stellar radial velocities. We find agreement between the fraction of stars with significant velocity variations and the expected fraction of binary stars in the halo and thick disk populations. The observations produce a list of 675 possible new spectroscopic binary stars and orbits for eight of them.

D. Pourbaix; G. R. Knapp; P. Szkody; Z. Ivezic; S. J. Kleinman; D. Long; S. A. Snedden; A. Nitta; M. Harvanek; J. Krzesinski; H. J. Brewington; J. C. Barentine; E. H. Neilsen; J. Brinkman

2005-08-29T23:59:59.000Z

152

Candidate spectroscopic binaries in the Sloan Digital Sky Survey  

E-Print Network (OSTI)

We have examined the radial velocity data for stars spectroscopically observed by the Sloan Digital Sky Survey (SDSS) more than once to investigate the incidence of spectroscopic binaries, and to evaluate the accuracy of the SDSS stellar radial velocities. We find agreement between the fraction of stars with significant velocity variations and the expected fraction of binary stars in the halo and thick disk populations. The observations produce a list of 675 possible new spectroscopic binary stars and orbits for eight of them.

Pourbaix, D; Szkody, P; Ivezic, Z; Kleinman, S J; Long, D; Snedden, S A; Nitta, A; Harvanek, M; Krzesnski, J; Brewington, H J; Barentine, J C; Neilsen, E H; Brinkmann, J

2005-01-01T23:59:59.000Z

153

Trapping of a Coastal Density Front by the Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

The dynamics of a surface-to-bottom density front on a uniformly sloping continental shelf and the role of density advection in the bottom boundary layer are examined using a three-dimensional, primitive equation numerical model. The front is ...

David C. Chapman; Steven J. Lentz

1994-07-01T23:59:59.000Z

154

Technology assessments of advanced power generation systems 2: Kalina bottoming cycle: Final report  

SciTech Connect

A preliminary assessment of the Kalina cycle as the bottoming system of a small, combined-cycle power plant found that the cost of electricity for this plant was calculated to be somewhat less than that of competing steam-bottoming systems. This new system requires further analysis, however, particularly of the trade-off between heat exchanger cost and cycle performance.

1986-11-01T23:59:59.000Z

155

Technology Assessments of Advanced Power Generation Systems II--Kalina Bottoming Cycle  

Science Conference Proceedings (OSTI)

A preliminary assessment of the Kalina cycle as the bottoming system of a small, combined-cycle power plant found that the cost of electricity for this plant was calculated to be somewhat less than that of competing steam-bottoming systems. This new system requires further analysis, however, particularly of the trade-off between heat exchanger cost and cycle performance.

1986-11-14T23:59:59.000Z

156

Structural Competition and Phase Transformations in Binary Ti-Nb ...  

Science Conference Proceedings (OSTI)

Structural Competition and Phase Transformations in Binary Ti-Nb Alloys for Biomedical Applications Structure and Fracture Resistance of Armored Fish Scales.

157

Binary Equilibrium Phase Diagrams and the Third Law of ...  

Science Conference Proceedings (OSTI)

I will make suggestions of probable configurations of binary phase diagrams at low temperatures. This leads to an expansion of the concept of improbable...

158

Excess volumes and excess viscosities of binary mixtures of 1 ...  

Science Conference Proceedings (OSTI)

Excess volumes V E, excess viscosities 1/E, and excess free energies of activation ... KEY WORDS: activation energy; binary mixtures; free energy; l-

159

Mining Truth Tables and Straddling Biclusters in Binary Datasets.  

E-Print Network (OSTI)

??As the world swims deeper into a deluge of data, binary datasets relating objects to properties can be found in many different fields. Such datasets (more)

Owens, Clifford Conley

2010-01-01T23:59:59.000Z

160

Stochastic binary problems with simple penalties for capacity ...  

E-Print Network (OSTI)

Mar 24, 2009 ... Abstract: This paper studies stochastic programs with first-stage binary variables and capacity constraints, using simple penalties for capacities...

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

DESTRUCTION OF BINARY MINOR PLANETS DURING NEPTUNE SCATTERING  

Science Conference Proceedings (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

162

A Molecular-Thermodynamic Lattice Model for Binary Mixtures  

E-Print Network (OSTI)

A Molecular-Thermodynamic Lattice Model for Binary Mixtures*was much interest in the thermodynamic properties of binarythat end, we use the thermodynamic perturbation method,

Qin, Yuan; Prausnitz, John M.

2005-01-01T23:59:59.000Z

163

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

164

Peach Bottom and Vermont Yankee Nuclear Power Plants  

Science Conference Proceedings (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

165

DYNAMICAL CAPTURE BINARY NEUTRON STAR MERGERS  

SciTech Connect

We study dynamical capture binary neutron star mergers as may arise in dense stellar regions such as globular clusters. Using general-relativistic hydrodynamics, we find that these mergers can result in the prompt collapse to a black hole or in the formation of a hypermassive neutron star, depending not only on the neutron star equation of state but also on impact parameter. We also find that these mergers can produce accretion disks of up to a tenth of a solar mass and unbound ejected material of up to a few percent of a solar mass. We comment on the gravitational radiation and electromagnetic transients that these sources may produce.

East, William E.; Pretorius, Frans [Department of Physics, Princeton University, Princeton, NJ 08544 (United States)

2012-11-20T23:59:59.000Z

166

Thermodynamics of magnetized binary compact objects  

Science Conference Proceedings (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

167

TIDAL INTERACTIONS IN MERGING WHITE DWARF BINARIES  

SciTech Connect

The recently discovered system J0651 is the tightest known detached white dwarf (WD) binary. Since it has not yet initiated Roche-lobe overflow, it provides a relatively clean environment for testing our understanding of tidal interactions. I investigate the tidal heating of each WD, parameterized in terms of its tidal Q parameter. Assuming that the heating can be radiated efficiently, the current luminosities are consistent with Q {sub 1} {approx} 7 x 10{sup 10} and Q {sub 2} {approx} 2 x 10{sup 7}, for the He and C/O WDs, respectively. Conversely, if the observed luminosities are merely from the cooling of the WDs, these estimated values of Q represent the upper limits. A large Q {sub 1} for the He WD means its spin velocity will be slower than that expected if it was tidally locked, which, since the binary is eclipsing, may be measurable via the Rossiter-McLaughlin effect. After one year, gravitational wave emission shifts the time of eclipses by 5.5 s, but tidal interactions cause the orbit to shrink more rapidly, changing the time by up to an additional 0.3 s after a year. Future eclipse timing measurements may therefore infer the degree of tidal locking.

Piro, Anthony L., E-mail: piro@caltech.edu [Theoretical Astrophysics, California Institute of Technology, 1200 East California Boulevard, M/C 350-17, Pasadena, CA 91125 (United States)

2011-10-20T23:59:59.000Z

168

Binary self-dual codes with automorphisms of order 23  

Science Conference Proceedings (OSTI)

The only example of a binary doubly-even self-dual [120,60,20] code was found in 2005 by Gaborit etal. (IEEE Trans Inform theory 51, 402---407 2005). In this work we present 25 new binary doubly-even self-dual [120,60,20] ... Keywords: 94B05, Algorithms, Automorphisms, Self-dual codes

Radinka Yorgova; Alfred Wassermann

2008-08-01T23:59:59.000Z

169

Identification of Wiener systems with binary-valued output observations  

Science Conference Proceedings (OSTI)

This work is concerned with identification of Wiener systems whose outputs are measured by binary-valued sensors. The system consists of a linear FIR (finite impulse response) subsystem of known order, followed by a nonlinear function with a known parametrization ... Keywords: Binary-valued observations, Identification, Joint identifiability, Parameter estimation, Periodic inputs, Sensor thresholds, Wiener systems

Yanlong Zhao; Le Yi Wang; G. George Yin; Ji-Feng Zhang

2007-10-01T23:59:59.000Z

170

Modelling light curves of binary systems: accounting for extended winds  

E-Print Network (OSTI)

We suggest a simple synthesis model of an eclipsing binary system which includes one component with strong stellar wind. Numerical simulations show that the shape of the light curve (and in particularly the widths of the minima) strongly depends on wind parameters. Wind effects are crucial in modelling light curves of binaries including e.g., WR stars.

Antokhina, E A; Cherepashchuk, A M

2013-01-01T23:59:59.000Z

171

Information---Theoretic Multiclass Classification Based on Binary Classifiers  

Science Conference Proceedings (OSTI)

In this paper, we consider the multiclass classification problem based on sets of independent binary classifiers. Each binary classifier represents the output of a quantized projection of training data onto a randomly generated orthonormal basis vector ... Keywords: Classification, Coding matrix design, Complexity, Maximum number of classes, Reliability

Sviatoslav Voloshynovskiy; Oleksiy Koval; Fokko Beekhof; Taras Holotyak

2011-12-01T23:59:59.000Z

172

Layered Binary-Dielectrics for Energy Applications: Limitations and Potentials  

Science Conference Proceedings (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

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

Pages that link to "A Flashing Binary Combined Cycle For Geothermal...  

Open Energy Info (EERE)

Twitter icon Pages that link to "A Flashing Binary Combined Cycle For Geothermal Power Generation" A Flashing Binary Combined Cycle For Geothermal Power Generation...

175

Materials Reliability Program: Safety Evaluation for Boric Acid Wastage of PWR Reactor Vessel Bottom Heads Due to Bottom-Mounted Noz zle Leakage (MRP-167)  

Science Conference Proceedings (OSTI)

This safety assessment addresses one of the potential safety issues associated with aging degradation of reactor vessel bottom head penetrations: bottom mounted nozzles (BMNs). Specifically, this report evaluates the concern that BMN leakage due to primary water stress corrosion cracking (PWSCC) of the Alloy 600 nozzle and/or Alloy 82/182 J-groove attachment weld could lead to significant wastage of the low-alloy steel head shell material due to concentration of the boric acid present in the leaking prim...

2008-07-02T23:59:59.000Z

176

Evaluation of the Accuracy of a Ship-Mounted, Bottom-Tracking ADCP in a Near-Shore Coastal Flow  

Science Conference Proceedings (OSTI)

The accuracy of an acoustic Doppler current profiler (ADCP) used with an internal bottom-tracking system is considered. The boat speed measured using bottom tracking is extremely accurate, comparable to the speeds measured by a high-resolution, ...

Derek A. Fong; Stephen G. Monismith

2004-07-01T23:59:59.000Z

177

A Self-Contained Sector-Scanning Sonar for Bottom Roughness Observations as Part of Sediment Transport Studies  

Science Conference Proceedings (OSTI)

Studies and models of sediment transport in the bottom boundary layer require knowledge of the bottom roughness as a parameter affecting the suspension and transport of sediment. Knowledge of this has often been quite imprecise since measurements ...

J. D. Irish; J. F. Lynch; P. A. Traykovski; A. E. Newhall; K. Prada; A. E. Hay

1999-11-01T23:59:59.000Z

178

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

179

Estimation of binary Markov random fields  

E-Print Network (OSTI)

The theoryand practiceof estimationof binary Markov random fields on lattices is reviewedand advanced. The natural objects of inference are the local conditionaldistributions, which define an exponential family owing to the equivalence between Markov and Gibbs random fields. Maximumlikelihoodestimation generally is impracticable. Methods of asymptotic, or otherwise approximate, maximum likelihood estimation do not easily apply in all cases likely to be of practical interest. The only generallypracticableprocedures available thus far are the Coding Method and MaximumPseudo-Likelihood. A new estimation procedure is suggestedthat is strongly consistentfor processesdefined by translation-invariant families of local conditionaldistributions. The procedure is analogous to minimum logit chi-squareestimation in logistic regression, does not involve non-linearoptimization, and decisively beats Maximum Pseudo-Likelihood in mean squarederror. Subsarnpling techniques can be employed to assess precision,and to increase efficiency, in estimation.

Antonio Possolo; Anond Possolo

1986-01-01T23:59:59.000Z

180

High-energy emission from pulsar binaries  

E-Print Network (OSTI)

Unpulsed, high-energy emission from pulsar binaries can be attributed to the interaction of a pulsar wind with that of a companion star. At the shock between the outflows, particles carried away from the pulsar magnetosphere are accelerated and radiate both in synchrotron and inverse Compton processes. This emission constitutes a significant fraction of the pulsar spin-down luminosity. It is not clear however, how the highly magnetized pulsar wind could convert its mainly electromagnetic energy into the particles with such high efficiency. Here we investigate a scenario in which a pulsar striped wind converts into a strong electromagnetic wave before reaching the shock. This mode can be thought of as a shock precursor that is able to accelerate particles to ultrarelativistic energies at the expense of the electromagnetic energy it carries. Radiation of the particles leads to damping of the wave. The efficiency of this process depends on the physical conditions imposed by the external medium. Two regimes can b...

Mochol, Iwona

2013-01-01T23:59:59.000Z

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

Binary hyper-redundant robotic manipulator concept  

E-Print Network (OSTI)

Continuously actuated robotic manipulators are the most common type of manipulators even though they require sophisticated and expensive control and sensor systems to function with high accuracy and repeatability. Binary hyper-redundant (Bi-HR) robotic manipulators are potential candidates to be used in applications where high repeatability and reasonable accuracy are required. Such applications include pick-and-place, spot welding and assistants to people with disabilities. Generally, the Bi-HR manipulator is relatively inexpensive, lightweight, and has a high payload to arm weight ratio. This paper discusses a concept of Bi-HR manipulator, influencing concepts to the Bi-HR, examples of applications, and its advantages and disadvantages. 1.

Jackrit Suthakorn

2004-01-01T23:59:59.000Z

182

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

183

Evolution of the Deep Western Boundary Current of Antarctic Bottom Water in the Brazil Basin  

Science Conference Proceedings (OSTI)

A synthesis of WOCE (and other) hydrographic data shows that the deep western boundary current of Antarctic Bottom Water has a double-core structure, and that it is differentially modified during its northward transit through the Brazil Basin. At ...

Francisco J. Sandoval; Georges L. Weatherly

2001-06-01T23:59:59.000Z

184

Subpolar ocean bottom pressure oscillation and its links to the tropical ENSO  

Science Conference Proceedings (OSTI)

Recent analysis of ocean bottom pressure (OBP) data from the Gravity Recovery and Climate Experiment (GRACE) satellites reveals strong El Nino/Southern Oscillation (ENSO)-like oscillating phenomena in the subpolar gyre of the North Pacific. The oscillation ...

Y. T. Song; V. Zlotnicki

2008-11-01T23:59:59.000Z

185

Mass transport in the Stokes edge wave for constant arbitrary bottom slope in a rotating ocean  

Science Conference Proceedings (OSTI)

The Lagrangian mass transport in the Stokes surface edge wave is obtained from the vertically integrated equations of momentum and mass in a viscous rotating ocean, correct to second order in wave steepness. The analysis is valid for bottom slope ...

Peygham Ghaffari; Jan Erik H. Weber

186

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

187

Simple Models of Coastal-Trapped Waves Based on the Shape of the Bottom Topography  

Science Conference Proceedings (OSTI)

Solutions of barotropic coastal-trapped waves in the shallow-water context are discussed for different shapes of the bottom topography. In particular, an infinite family of topographic waves over continental shelves characterized by a shape ...

L. Zavala Sansn

2012-03-01T23:59:59.000Z

188

Representing energy technologies in top-down economic models using bottom-up information  

E-Print Network (OSTI)

This paper uses bottom-up engineering information as a basis for modeling new technologies within the MIT Emissions Prediction and Policy Analysis (EPPA) model, a computable general equilibrium model of the world economy. ...

McFarland, James R.; Reilly, John M.; Herzog, Howard J.

189

Deep and Bottom Waters in the Eastern Scotia Sea: Rapid Changes in Properties and Circulation  

Science Conference Proceedings (OSTI)

Two meridional hydrographic transects (in 1995 and 1999) across the eastern Scotia Sea are used to investigate variability in the deep and bottom waters between the South Scotia Ridge and South Georgia. There is a significant warming of the warm ...

Michael P. Meredith; Alberto C. Naveira Garabato; David P. Stevens; Karen J. Heywood; Richard J. Sanders

2001-08-01T23:59:59.000Z

190

Stability of Antarctic Bottom Water Formation to Freshwater Fluxes and Implications for Global Climate  

Science Conference Proceedings (OSTI)

The stability of Antarctic Bottom Water (AABW) to freshwater (FW) perturbations is investigated in a coupled climate model of intermediate complexity. It is found that AABW is stable to surface freshwater fluxes greater in volume and rate to ...

Jessica Trevena; Willem P. Sijp; Matthew H. England

2008-07-01T23:59:59.000Z

191

Configuration and performance of the indirect-fired fuel cell bottomed turbine cycle  

SciTech Connect

The natural gas, indirect-fired fuel cell bottomed turbine cycle (NG-IFFC) is introduced as a novel power plant system for the distributed power and on-site markets in the 20--200 megawatt (MW) size range. The novel indirect-fired carbonate fuel cell bottomed turbine cycle (NG-IFCFC) power plant system configures the ambient pressure carbonate fuel cell with a gas turbine, air compressor, combustor, and ceramic heat exchanger. Performance calculations from ASPEN simulations present material and energy balances with expected power output. The results indicate efficiencies and heat rates for the NG-IFCFC are comparable to conventionally bottomed carbonate fuel cell steam bottomed cycles, but with smaller and less expensive components.

Micheli, P.L.; Williams, M.C.; Parsons, E.L. Jr.

1993-12-31T23:59:59.000Z

192

Synthetic Subsurface Pressure Derived from Bottom Pressure and Tide Gauge Observations  

Science Conference Proceedings (OSTI)

Synthetic subsurface pressure (SSP) can be formed from tide gauge records and from bottom pressure measurements to provide a consistent and convenient basis for comparison of these two different types of observations. Common methods for this ...

Sabine Harms; Clinton D. Winant

1994-12-01T23:59:59.000Z

193

On the Forcing Mechanisms Affecting the Bottom Shear Stress in Coastal Waters  

Science Conference Proceedings (OSTI)

Three papers have appeared in the literature in the past four years which report current data indicating that the bottom shear stress is larger than the surface shear stress. The sites involved in the three studies had many similarities including ...

Cortis Cooper; Bryan Pearce

1980-11-01T23:59:59.000Z

194

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

195

Bottom Stress in Wind-Driven Depth-Averaged Coastal Flows  

Science Conference Proceedings (OSTI)

The relationship between depth-averaged velocity and bottom stress for purely wind-driven flows in unstratified coastal waters is examined using a one-dimensional (vertically resolving) current model. Results indicate that conventional drag laws ...

Harry L. Jenter; Ole Secher Madsen

1989-07-01T23:59:59.000Z

196

Localized Coupling between Surface and Bottom-Intensified Flow over Topography  

Science Conference Proceedings (OSTI)

Substantial bottom topography in a basin with planetary vorticity gradients strongly affects the vertical structure of the linear topographic and planetary Rossby waves that spin up the ocean circulation. There is no barotropic mode with large ...

Robert Hallberg

1997-06-01T23:59:59.000Z

197

Influence of a Strong Bottom Slope on the Evolution of a Surface-Intensified Vortex  

Science Conference Proceedings (OSTI)

The authors investigate the influence of steep bottom topography on the propagation of a vortex in a two-layer quasigeostrophic model. The vortex is intensified in the upper layer and the planetary beta effect is taken into account.

Virginie Thierry; Yves Morel

1999-05-01T23:59:59.000Z

198

The Direct Estimation of Near-Bottom Turbulent Fluxes in the Presence of Energetic Wave Motions  

Science Conference Proceedings (OSTI)

Velocities produced by energetic waves can contaminate direct covariance estimates of near-bottom turbulent shear stress and turbulent heat flux. A new adaptive filtering technique is introduced to minimize the contribution of wave-induced ...

W. J. Shaw; J. H. Trowbridge

2001-09-01T23:59:59.000Z

199

Properties of Noise Registered by Pop-Up Ocean-Bottom Seismographs  

Science Conference Proceedings (OSTI)

Experiments, made by the Laboratory of Seismology, Shirshov Institute of Oceanology, have shown that the near-bottom currents excite oscillation modes specific to the body of a pop-up seismic station. These motions can affect the seismic sensor, ...

S. A. Kovachev; T. A. Demidova; A. V. Sonkin

1997-08-01T23:59:59.000Z

200

Turbulence Characteristics and Dissipation Estimates in the Coastal Ocean Bottom Boundary Layer from PIV Data  

Science Conference Proceedings (OSTI)

Turbulence characteristics in the coastal ocean bottom boundary layer are measured using a submersible Particle Image Velocimetry (PIV) system with a sample area of 20 20 cm2. Measurements are performed in the New York Bight at elevations ...

P. Doron; L. Bertuccioli; J. Katz; T. R. Osborn

2001-08-01T23:59:59.000Z

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.


201

Treated bottom ash medium and method of arsenic removal from drinking water  

DOE Patents (OSTI)

A method for low-cost arsenic removal from drinking water using chemically prepared bottom ash pre-treated with ferrous sulfate and then sodium hydroxide. Deposits on the surface of particles of bottom ash form of activated iron adsorbent with a high affinity for arsenic. In laboratory tests, a miniscule 5 grams of pre-treated bottom ash was sufficient to remove the arsenic from 2 liters of 2400 ppb (parts per billion) arsenic-laden water to a level below 50 ppb (the present United States Environmental Protection Agency limit). By increasing the amount of pre-treated bottom ash, even lower levels of post-treatment arsenic are expected. It is further expected that this invention supplies a very low-cost solution to arsenic poisoning for large population segments.

Gadgil, Ashok (El Cerrito, CA)

2009-06-09T23:59:59.000Z

202

Decadal Freshening of the Antarctic Bottom Water Exported from the Weddell Sea  

Science Conference Proceedings (OSTI)

Recent decadal changes in Southern Hemisphere climate have driven strong responses from the cryosphere. Concurrently, there has been a marked freshening of the shelf and bottom waters across a wide sector of the Southern Ocean, hypothesized to be ...

Loc Jullion; Alberto C. Naveira Garabato; Michael P. Meredith; Paul R. Holland; Peggy Courtois; Brian A. King

2013-10-01T23:59:59.000Z

203

Bottom Currents Derived from a Shipborne ADCP on WOCE Cruise A11 in the South Atlantic  

Science Conference Proceedings (OSTI)

This paper is divided into two parts: the first describing an enhancement of the shipborne ADCP system and the second describing information about bottom currents that have been obtained therefrom on WOCE cruise A11 in the South Atlantic, Punta ...

Peter M. Saunders; Brian A. King

1995-03-01T23:59:59.000Z

204

A Linear Equivalent Barotropic Model of the Antarctic Circumpolar Current with Realistic Coastlines and Bottom Topography  

Science Conference Proceedings (OSTI)

A linear equivalent barotropic (EB) model is applied to study the effects of the bottom topography H and baroclinicity on the total transport and the position of the Antarctic Circumpolar Current (ACC). The model is based on the observation of ...

Alexander Krupitsky; Vladimir M. Kamenkovich; Naomi Naik; Mark A. Cane

1996-09-01T23:59:59.000Z

205

A Study of Tidal Energy Dissipation and Bottom Stress in an Estuary  

Science Conference Proceedings (OSTI)

A Method for inferring an area-averaged bottom stress and energy dissipation rate in a tidal estuarine channel is presented. The one-dimensional continuity and momentum relations are developed using simplifying assumptions appropriate for a well-...

Wendell S. Brown; Richard P. Trask

1980-11-01T23:59:59.000Z

206

Acceleration of a Stratified Current over a Sloping Bottom, Driven by an Alongshelf Pressure Gradient  

Science Conference Proceedings (OSTI)

An idealized theoretical model is developed for the acceleration of a two-dimensional, stratified current over a uniformly sloping bottom, driven by an imposed alongshelf pressure gradient and taking into account the effects of buoyancy advection ...

David C. Chapman; Steven J. Lentz

2005-08-01T23:59:59.000Z

207

Adjoint Sensitivity of an Ocean General Circulation Model to Bottom Topography  

Science Conference Proceedings (OSTI)

Bottom topography, or more generally the geometry of the ocean basins, is an important ingredient in numerical ocean modeling. With the help of an adjoint model, it is shown that scalar diagnostics or objective functions in a coarse-resolution ...

Martin Losch; Patrick Heimbach

2007-02-01T23:59:59.000Z

208

Three-Dimensional Turbulent Bottom Density Currents from a High-Order Nonhydrostatic Spectral Element Model  

Science Conference Proceedings (OSTI)

Overflows are bottom gravity currents that supply dense water masses generated in high-latitude and marginal seas into the general circulation. Oceanic observations have revealed that mixing of overflows with ambient water masses takes place over ...

Tamay M. zgkmen; Paul F. Fischer; Jinqiao Duan; Traian Iliescu

2004-09-01T23:59:59.000Z

209

A Dense Current Flowing down a Sloping Bottom in a Rotating Fluid  

Science Conference Proceedings (OSTI)

A density-driven current was generated in the laboratory by releasing dense fluid over a sloping bottom in a rotating freshwater system. The behavior of the dense fluid descending the slope has been investigated by systematically varying four ...

C. Cenedese; J. A. Whitehead; T. A. Ascarelli; M. Ohiwa

2004-01-01T23:59:59.000Z

210

POPUP: A Prototype Bottom-Moored Long-Term Current Profiler  

Science Conference Proceedings (OSTI)

A self-contained, bottom-mounted instrument for measuring high-resolution vertical profiles of horizontal current in the deep ocean over long time periods (up to a year) has been designed, constructed and successfully tested. It employs an ...

Arthur D. Voorhis; Albert M. Bradley

1984-06-01T23:59:59.000Z

211

Determining Bottom Reflectance and Water Optical Properties Using Unmanned Underwater Vehicles under Clear or Cloudy Skies  

Science Conference Proceedings (OSTI)

An unmanned underwater vehicle (UUV) with hyperspectral optical sensors that measure downwelling irradiance and upwelling radiance was deployed over sandy bottoms, sea grass patches, and coral reefs near Lee Stocking Island, Bahamas, during the ...

David C. English; Kendall L. Carder

2006-02-01T23:59:59.000Z

212

Simulation of measuring bottom quark flow in heavy ion collisions using the CMS detector  

E-Print Network (OSTI)

In this thesis, I carried out a simulation study to characterize the measurement of bottom quark flow in relativistic Pb+Pb collisions using the Compact Muon Solenoid experiment. The Hydjet event generator is used to produce ...

Franke, Arthur James

2007-01-01T23:59:59.000Z

213

A Coupled HydrodynamicBottom Boundary Layer Model of Ekman Flow on Stratified Continental Shelves  

Science Conference Proceedings (OSTI)

This paper describes a hydrodynamic model with turbulent energy closure that uses a simplified wave-current interaction model of the bottom boundary layer to compute bed drag coefficients. The coupled model is used to investigate the interaction ...

Timothy R. Keen; Scott M. Glenn

1994-08-01T23:59:59.000Z

214

Decadal freshening of the Antarctic Bottom Water exported from the Weddell Sea  

Science Conference Proceedings (OSTI)

Recent decadal changes in Southern Hemisphere climate have driven strong responses from the cryosphere. Concurrently, there has been a marked freshening of the shelf and bottom waters across a wide sector of the Southern Ocean, hypothesised to be ...

Loc Jullion; Alberto C. Naveira Garabato; Michael P. Meredith; Paul R. Holland; Peggy Courtois; Brian A. King

215

Extracting the three- and four-graviton vertices from binary pulsars and coalescing binaries  

E-Print Network (OSTI)

Using a formulation of the post-Newtonian expansion in terms of Feynman graphs, we discuss how various tests of General Relativity (GR) can be translated into measurement of the three- and four-graviton vertices. In problems involving only the conservative dynamics of a system, a deviation of the three-graviton vertex from the GR prediction is equivalent, to lowest order, to the introduction of the parameter beta_{PPN} in the parametrized post-Newtonian formalism, and its strongest bound comes from lunar laser ranging, which measures it at the 0.02% level. Deviation of the three-graviton vertex from the GR prediction, however, also affects the radiative sector of the theory. We show that the timing of the Hulse-Taylor binary pulsar provides a bound on the deviation of the three-graviton vertex from the GR prediction at the 0.1% level. For coalescing binaries at interferometers we find that, because of degeneracies with other parameters in the template such as mass and spin, the effects of modified three- and four-graviton vertices is just to induce an error in the determination of these parameters and, at least in the restricted PN approximation, it is not possible to use coalescing binaries for constraining deviations of the vertices from the GR prediction.

Umberto Cannella; Stefano Foffa; Michele Maggiore; Hillary Sanctuary; Riccardo Sturani

2009-07-13T23:59:59.000Z

216

Equilibrium, Stability and Orbital Evolution of Close Binary Systems  

E-Print Network (OSTI)

We present a new analytic study of the equilibrium and stability properties of close binary systems containing polytropic components. Our method is based on the use of ellipsoidal trial functions in an energy variational principle. We consider both synchronized and nonsynchronized systems, constructing the compressible generalizations of the classical Darwin and Darwin-Riemann configurations. Our method can be applied to a wide variety of binary models where the stellar masses, radii, spins, entropies, and polytropic indices are all allowed to vary over wide ranges and independently for each component. We find that both secular and dynamical instabilities can develop before a Roche limit or contact is reached along a sequence of models with decreasing binary separation. High incompressibility always makes a given binary system more susceptible to these instabilities, but the dependence on the mass ratio is more complicated. As simple applications, we construct models of double degenerate systems and of low-mass main-sequence-star binaries. We also discuss the orbital evolution of close binary systems under the combined influence of fluid viscosity and secular angular momentum losses from processes like gravitational radiation. We show that the existence of global fluid instabilities can have a profound effect on the terminal evolution of coalescing binaries. The validity of our analytic solutions is examined by means of detailed comparisons with the results of recent numerical fluid calculations in three dimensions.

D. Lai; F. A. Rasio; S. L. Shapiro

1993-07-22T23:59:59.000Z

217

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

218

THE ASTROPHYSICS OF ULTRA-COMPACT BINARIES A WHITE PAPER FOR THE ASTRO2010 DECADAL REVIEW  

E-Print Network (OSTI)

THE ASTROPHYSICS OF ULTRA-COMPACT BINARIES A WHITE PAPER FOR THE ASTRO2010 DECADAL REVIEW G interact- ing AM CVn stars, ultra-compact X-ray binaries, detached double white dwarfs, double neutron stars, white dwarf/neutron star binaries and as yet unobserved binaries such as black holes with neutron

219

The use of sulfer modified bottom ash (SMBA) as an aggregate in asphaltic mixtures  

E-Print Network (OSTI)

Of the 20 million tons of bottom ash and boiler slag generated annually in the United States less than 40 percent is used. The eastern half of Texas is served by 18 coal burning electric power generating plants which produce approximately 3.8 million tons of bottom ash each year. This is also the section of the state in which the sources of quality aggregates are either few. dwindling or nonexistent. While a small fraction of the bottom ash is utilized, the rest is delegated to landfills or on-site disposal areas. Increasing attention is being given to development of new, high-volume uses for this safe and readily available by-product. One such use is as an aggregate in road construction. The use of bottom ash as an aggregate for both roadway surfaces and base courses has been limited due to its absorbency and friability. The former tends to increase asphalt binder demand while the latter adversely affects its ability to withstand the crushing effects of traffic loads. On the other hand, bottom ash is lighter in weight and generally much cheaper than conventional quality aggregates such as limestone, sand and gavel. This research was designed to up-firade the load-bearing characteristics of bottom ash and maximize its use 'in asphaltic concrete roadway mixtures through the use of sulfur. The process essentially coats the ash with liquid sulfur which upon cooling fills the voids on the surface of the particles while increasing their crush resistance. The results of this investigation indicate that asphaltic concrete mix designs in which bottom ash represents from 5 0 to I 00 percent of the aggregate fraction can be achieved.

Chimakurthy, Harshavardhan

1998-01-01T23:59:59.000Z

220

THE DISPERSAL OF PROTOPLANETARY DISKS AROUND BINARY STARS  

SciTech Connect

I present models of disk evolution around young binary stars. I show that the primary factor in determining circumbinary disk lifetimes is the rate of disk photoevaporation. I also find that photoevaporative clearing leaves a signature on the distribution of circumbinary disk lifetimes, with a sharp increase in disk lifetimes for binary separations a {approx}< 0.3-1 AU. Observations of young binary stars can therefore be used to test models of disk evolution, and I show that current data set a strong upper limit to the rate of on-going photoevaporation (<10{sup -9} M{sub Sun} yr{sup -1}). Finally I discuss the implications of these results for planet formation and suggest that circumbinary planets around close (a {approx}< 1 AU) binaries should be relatively common.

Alexander, Richard, E-mail: richard.alexander@leicester.ac.uk [Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom)

2012-10-01T23:59:59.000Z

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.


221

Maximin D-optimal designs for binary longitudinal responses  

Science Conference Proceedings (OSTI)

Optimal design problems for logistic mixed effects models for binary longitudinal responses are considered. A function of the approximate information matrix under the framework of the Penalized Quasi Likelihood (PQL) and a generalized linear mixed model ...

Fetene B. Tekle; Frans E. S. Tan; Martijn P. F. Berger

2008-08-01T23:59:59.000Z

222

N-body integrators for planets in binary star systems  

E-Print Network (OSTI)

Symplectic integrators are the tool of choice for many researchers studying dynamical systems because of their good long-term energy conservation properties. For systems with a dominant central mass, symplectic integrators are also highly efficient. In this chapter, I describe the theory of symplectic integrators in terms of Lie series. I show how conventional symplectic algorithms have been adapted for use in binary-star systems to study problems such as the dynamical stability of multi-planet systems and the accretion of planets from planetesimals. This is achieved by devising new coordinate systems for the wide-binary and close-binary cases separately. I show how the performance of these algorithms can be improved at little extra cost using symplectic correctors. Finally, I discuss drawbacks of these algorithms, in particular in dealing with close encounters with one or both members of the binary, and the prospects for overcoming these problems.

Chambers, John E

2007-01-01T23:59:59.000Z

223

N-body integrators for planets in binary star systems  

E-Print Network (OSTI)

Symplectic integrators are the tool of choice for many researchers studying dynamical systems because of their good long-term energy conservation properties. For systems with a dominant central mass, symplectic integrators are also highly efficient. In this chapter, I describe the theory of symplectic integrators in terms of Lie series. I show how conventional symplectic algorithms have been adapted for use in binary-star systems to study problems such as the dynamical stability of multi-planet systems and the accretion of planets from planetesimals. This is achieved by devising new coordinate systems for the wide-binary and close-binary cases separately. I show how the performance of these algorithms can be improved at little extra cost using symplectic correctors. Finally, I discuss drawbacks of these algorithms, in particular in dealing with close encounters with one or both members of the binary, and the prospects for overcoming these problems.

John E. Chambers

2007-05-22T23:59:59.000Z

224

STAR HOPPERS: PLANET INSTABILITY AND CAPTURE IN EVOLVING BINARY SYSTEMS  

SciTech Connect

Many planets are observed in stellar binary systems, and their frequency may be comparable to that of planetary systems around single stars. Binary stellar evolution in such systems influences the dynamical evolution of the resident planets. Here, we study the evolution of a single planet orbiting one star in an evolving binary system. We find that stellar evolution can trigger dynamical instabilities that drive planets into chaotic orbits. This instability leads to planet-star collisions, exchange of the planet between the binary stars ('star hoppers'), and ejection of the planet from the system. The means by which planets can be recaptured is similar to the pull-down capture mechanism for irregular solar system satellites. Because planets often suffer close encounters with the primary on the asymptotic giant branch, captures during a collision with the stellar envelope are also possible for more massive planets. Such capture could populate the habitable zone around white dwarfs.

Kratter, Kaitlin M.; Perets, Hagai B. [Institute for Theory and Computation, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2012-07-01T23:59:59.000Z

225

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

226

BinSlayer: accurate comparison of binary executables  

Science Conference Proceedings (OSTI)

As the volume of malware inexorably rises, comparison of binary code is of increasing importance to security analysts as a method of automatically classifying new malware samples; purportedly new examples of malware are frequently a simple evolution ...

Martial Bourquin; Andy King; Edward Robbins

2013-01-01T23:59:59.000Z

227

Modular Wellhead Binary Power System: Preliminary Design Results  

Science Conference Proceedings (OSTI)

To provide the utility industry with effective and flexible binary-cycle power plants, preliminary engineering analyses were conducted on a standardized design being developed for a modular wellhead binary-cycle power system. This design will use heat sources, such as geothermal or waste heat, in the 300-450 degrees F temperature range and will meet utility requirements for small geothermal resource capacity needs.

1990-09-13T23:59:59.000Z

228

DK And: Reclassification as EW Binary from CCD Observations  

E-Print Network (OSTI)

This paper describes the reclassification of DK And, formerly classified as a RRc type star, as EW binary. 1599 CCD unfiltered and filtered (V and R band) observations between 1999 and 2005 show, that the star is actually an eclipsing binary star with a period of P = 0.4892224 +/- 0.0000002 [d] with epoch E0 = 2451435.4353 +/- 0.0010 (if all historic data were taken into account). From our new observations 12 timings of minimum light are given.

F. -J. Hambsch; D. Husar

2006-07-26T23:59:59.000Z

229

Anisotropic mass ejection in binary mergers  

E-Print Network (OSTI)

We investigate the mass loss from a rotationally distorted envelope following the early, rapid in-spiral of a companion star inside a common envelope. For initially wide, massive binaries (M_1+M_2=20M_{\\odot}, P\\sim 10 yr), the primary has a convective envelope at the onset of mass transfer and is able to store much of the available orbital angular momentum in its expanded envelope. Three-dimensional smoothed particle hydrodynamics calculations show that mass loss is enhanced at mid-latitudes due to shock reflection from a torus-shaped outer envelope. Mass ejection in the equatorial plane is completely suppressed if the shock wave is too weak to penetrate the outer envelope in the equatorial direction (typically when the energy deposited in the star is less than about one-third of the binding energy of the envelope). We present a parameter study to show how the geometry of the ejecta depends on the angular momentum and the energy deposited in the envelope during a merging event. Applications to the nearly axisymmetric, but very non-spherical nebulae around SN1987A and Sheridan 25 are discussed, as well as possible links to RY Scuti and the Small Magellanic Cloud object R4.

T. Morris; Ph. Podsiadlowski

2005-02-15T23:59:59.000Z

230

Microlensing Binaries Discovered through High-Magnification Channel  

E-Print Network (OSTI)

Microlensing can provide a useful tool to probe binary distributions down to low-mass limits of binary companions. In this paper, we analyze the light curves of 8 binary lensing events detected through the channel of high-magnification events during the seasons from 2007 to 2010. The perturbations, which are confined near the peak of the light curves, can be easily distinguished from the central perturbations caused by planets. However, the degeneracy between close and wide binary solutions cannot be resolved with a 3 \\sigma confidence level for 3 events, implying that the degeneracy would be an important obstacle in studying binary distributions. From investigating the dependence of the degeneracy on the lensing parameters, we find that the degeneracy becomes severe as the binary separation and the mass ratio deviate from the values of resonant caustics. The measured mass ratio of the event OGLE-2008-BLG-510/MOA-2008-BLG-369 is q~0.1, making the companion of the lens a strong brown-dwarf candidate.

Shin, I -G; Park, S -Y; Han, C; Allen, W; Bos, M; Christie, G W; Depoy, D L; Dong, S; Drummond, J; Gal-Yam, A; Gaudi, B S; Gould, A; Hung, L -W; Janczak, J; Kaspi, S; Lee, C -U; Mallia, F; Maoz, D; Maury, A; McCormick, J; Monard, L A G; Moorhouse, D; Munoz, J A; Natusch, T; Nelson, C; Park, B -G; Pogge, R W; Polishook, D; Shvartzvald, Y; Shporer, A; Thornley, G; Yee, J C; Abe, F; Bennett, D P; Bond, I A; Botzler, C S; Fukui, A; Furusawa, K; Hayashi, F; Hearnshaw, J B; Hosaka, S; Itow, Y; Kamiya, K; Kilmartin, P M; Kobara, S; Korpela, A; Lin, W; Ling, C H; Makita, S; Masuda, K; Matsubara, Y; Miyake, N; Muraki, Y; Nagaya, M; Nishimoto, K; Ohnishi, K; Okumura, T; Omori, K; Perrott, Y C; Rattenbury, N; Saito, To; Skuljan, L; Sullivan, D J; Sumi, T; Suzuki, D; Sweatman, W L; Tristram, P J; Wada, K; Yock, P C M; Szymanski, M K; Kubiak, M; Pietrzynski, G; Soszynski, I; Szewczyk, O; Udalski, A; Ulaczyk, K; Wyrzykowski, L; Albrow, M D; Batista, V; Beaulieu, J -P; Brillant, S; Cassan, A; Cole, A; Corrales, E; Coutures, Ch; Dieters, S; Prester, D Dominis; Donatowicz, J; Fouque, P; Greenhill, J; Kane, S R; Menzies, J; Sahu, K C; Wambsganss, J; Williams, A; Zub, M; Allan, A; Bramich, D M; Browne, P; Dominik, M; Horne, K; Kains, N; Snodgrass, C; Steele, I; Street, R; Tsapras, Y; Bozza, V; Burgdorf, M J; Novati, S Calchi; Dreizler, S; Finet, F; Glitrup, M; Grundahl, F; Harpsoe, K; Hinse, T C; Hundertmark, M; Jorgensen, U G; Liebig, C; Maier, G; Mancini, L; Mathiasen, M; Rahvar, S; Ricci, D; Scarpetta, G; Skottfelt, J; Surdej, J; Southworth, J; Zimmer, F

2011-01-01T23:59:59.000Z

231

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

232

Diverse spreading behavior of binary polymer nanodroplets.  

SciTech Connect

Molecular dynamics simulations are used to study the spreading of binary polymer nanodroplets in a cylindrical geometry. The polymers, described by the bead-spring model, spread on a flat surface with a surface-coupled Langevin thermostat to mimic the effects of a corrugated surface. Each droplet consists of chains of length 10 or 100 monomers with {approx}350,000 monomers total. The qualitative features of the spreading dynamics are presented for differences in chain length, surface interaction strength, and composition. When the components of the droplet differ only in the surface interaction strength, the more strongly wetting component forms a monolayer film on the surface even when both materials are above or below the wetting transition. In the case where the only difference is the polymer chain length, the monolayer film beneath the droplet is composed of an equal amount of short chain and long chain monomers even when one component (the shorter chain length) is above the wetting transition and the other is not. The fraction of short and long chains in the precursor foot depends on whether both the short and the long chains are in the wetting regime. Diluting the concentration of the strongly wetting component in a mixture with a weakly wetting component decreases the rate of diffusion of the wetting material from the bulk to the surface and limits the spreading rate of the precursor foot, but the bulk spreading rate actually increases when both components are present. This may be due to the strongly wetting material pushing out the weakly wetting material as it moves toward the precursor foot.

Webb, Edmund Blackburn, III; Grest, Gary Stephen; Heine, David R.

2005-01-01T23:59:59.000Z

233

HOT BOTTOM BURNING IN INTERMEDIATE MASS STARS JOHN LATTANZIO 1;2 , CHERYL FROST 1;2 , ROBERT CANNON 2;3 , PETER WOOD 4  

E-Print Network (OSTI)

HOT BOTTOM BURNING IN INTERMEDIATE MASS STARS JOHN LATTANZIO 1;2 , CHERYL FROST 1;2 , ROBERT CANNON burning in the bottom of the convective envelope. We find strong CN cycling, with substantial Al include the recently discovered ``Hot Bottom Burning''. Hot Bottom Burning (hereafter HBB

Lattanzio, John

234

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.

235

Thin shell morphology in the circumstellar medium of massive binaries  

E-Print Network (OSTI)

We investigate the morphology of the collision front between the stellar winds of binary components in two long-period binary systems, one consisting of a hydrogen rich Wolf-Rayet star (WNL) and an O-star and the other of a Luminous Blue Variable (LBV) and an O-star. Specifically, we follow the development and evolution of instabilities that form in such a shell, if it is sufficiently compressed, due to both the wind interaction and the orbital motion. We use MPI-AMRVAC to time-integrate the equations of hydrodynamics, combined with optically thin radiative cooling, on an adaptive mesh 3D grid. Using parameters for generic binary systems, we simulate the interaction between the winds of the two stars. The WNL+O star binary shows a typical example of an adiabatic wind collision. The resulting shell is thick and smooth, showing no instabilities. On the other hand, the shell created by the collision of the O star wind with the LBV wind, combined with the orbital motion of the binary components, is susceptible to...

van Marle, Allard Jan; Meliani, Zakaria

2010-01-01T23:59:59.000Z

236

Binary Pulsar Shock Emissions as Galactic Gamma-Ray Sources  

E-Print Network (OSTI)

We address several issues regarding the interpretation of galactic \\ggg-ray sources. We consider powerful pulsars in binaries producing X-ray and gamma-ray {\\it unpulsed} emission from the shock interaction of relativistic pulsar winds with circumbinary material. Nebular mass outflows from companion stars of binary pulsars can provide the right {\\it calorimeters} to transform a fraction of the electromagnetic and kinetic energy of pulsar winds into high energy radiation. We discuss the physics of interaction of relativistic pulsar winds with gaseous material and show that the conditions in pulsar binary systems might be ideal to constrain shock acceleration mechanisms and pulsar wind composition and structure. We briefly discuss the example of the 47~ms pulsar PSR~1259-63 orbiting around a massive Be~star companion and monitored by X-ray and gamma-ray instruments during its recent periastron passage. In addition to young pulsars in massive binaries, also a class of recycled millisecond pulsars in low-mass binaries can be interesting high energy emitters.

M. Tavani

1995-02-10T23:59:59.000Z

237

DOUBLE-LINED SPECTROSCOPIC BINARY STARS IN THE RAVE SURVEY  

Science Conference Proceedings (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

238

Mergers of binary neutron stars with realistic spin  

E-Print Network (OSTI)

Simulations of binary neutron stars have seen great advances in terms of physical detail and numerical quality. However, the spin of the neutron stars, one of the simplest global parameters of binaries, remains mostly unstudied. We present the first, fully nonlinear general relativistic dynamical evolutions of the last three orbits for constraint satisfying initial data of spinning neutron star binaries, with astrophysically realistic spins aligned and anti-aligned to the orbital angular momentum. The initial data is computed with the constant rotational velocity approach. The dynamics of the systems is analyzed in terms of gauge-invariant binding energy vs. orbital angular momentum curves. By comparing to a binary black hole configuration we can estimate the different tidal and spin contributions to the binding energy for the first time. First results on the gravitational wave forms are presented. The phase evolution during the orbital motion is significantly affected by spin-orbit interactions, leading to delayed or early mergers. Furthermore, a frequency shift in the main emission mode of the hyper massive neutron star is observed. Our results suggest that a detailed modeling of merger waveforms requires the inclusion of spin, even for the moderate magnitudes observed in binary neutron star systems.

Sebastiano Bernuzzi; Tim Dietrich; Wolfgang Tichy; Bernd Bruegmann

2013-11-18T23:59:59.000Z

239

Analytical modeling and parameter extraction of top and bottom contact structures of organic thin film transistors  

Science Conference Proceedings (OSTI)

This paper proposes a structure based model of an organic thin film transistor (OTFT) and analyzes its device physics. The analytical model is developed for the top contact structure by mapping the overlap region to the resistance (in the vertical direction) ... Keywords: Analytical modeling, Contact resistance, Organic thin film transistor, Overlap region, Parameter extraction, Top and bottom contact structure, Vertical resistance

Brijesh Kumar, B. K. Kaushik, Y. S. Negi, S. Saxena, G. D. Varma

2013-09-01T23:59:59.000Z

240

An integrated top-down and bottom-up strategy for characterization protein isoforms and modifications  

SciTech Connect

Bottom-up and top-down strategies are two commonly used methods for mass spectrometry (MS) based protein identification; each method has its own advantages and disadvantages. In this chapter, we describe an integrated top-down and bottom-up approach facilitated by concurrent liquid chromatography-mass spectrometry (LC-MS) analysis and fraction collection for comprehensive high-throughput intact protein profiling. The approach employs a high resolution reversed phase (RP) LC separation coupled with LC eluent fraction collection and concurrent on-line MS with a high field (12 Tesla) Fourier-transform ion cyclotron resonance (FTICR) mass spectrometer. Protein elusion profiles and tentative modified protein identification are made using detected intact protein mass in conjunction with bottom-up protein identifications from the enzymatic digestion and analysis of corresponding LC fractions. Specific proteins of biological interest are incorporated into a target ion list for subsequent off-line gas-phase fragmentation that uses an aliquot of the original collected LC fraction, an aliquot of which was also used for bottom-up analysis.

Wu, Si; Tolic, Nikola; Tian, Zhixin; Robinson, Errol W.; Pasa-Tolic, Ljiljana

2011-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "beowawe bottoming binary" from the National Library of EnergyBeta (NLEBeta).
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241

The Coastal Bottom Boundary Layer: A Note on the Model of Chapman and Lentz  

Science Conference Proceedings (OSTI)

The bottom boundary layer of a stratified flow on a coastal continental shelf is examined using the model of Chapman and Lentz. The flow is driven by a surface stress, uniform in the alongshore coordinate, in a downwelling-favorable direction. ...

Joseph Pedlosky

2007-11-01T23:59:59.000Z

242

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

SciTech Connect

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

243

Fission product behavior in the Peach Bottom and Fort St. Vrain HTGRs  

SciTech Connect

Actual operating data from Peach Bottom and Fort St. Vrain were compared with code predictions to assess the validity of the methods used to predict the behavior of fission products in the primary coolant circuit. For both reactors the measured circuit activities were significantly below design values, and the observations generally verify the codes used for large HTGR design.

Hanson, D.L.; Baldwin, N.L.; Strong, D.E.

1980-11-01T23:59:59.000Z

244

Transport of Bottom Water in the Romanche Fracture Zone and the Chain Fracture Zone  

Science Conference Proceedings (OSTI)

Two moored arrays deployed in the Romanche Fracture Zone and Chain Fracture Zone in the equatorial Atlantic Ocean provide two-year-long time series of current and temperature in the Lower North Atlantic Deep Water and the Antarctic Bottom Water. ...

Herl Mercier; Kevin G. Speer

1998-05-01T23:59:59.000Z

245

Effect of Sea Ice on the Salinity of Antarctic Bottom Waters  

Science Conference Proceedings (OSTI)

Brine rejection during the formation of Antarctic sea ice is known to enhance the salinity of dense shelf waters in the Weddell and Ross Seas. As these shelf waters flow off the shelves and descend to the bottom, they entrain ambient deep water ...

J. R. Toggweiler; B. Samuels

1995-09-01T23:59:59.000Z

246

China's Development Could Lead to Bottom Water Formation in the Japan/East Sea  

Science Conference Proceedings (OSTI)

Using hydrographic data and box models, it is shown that the presently discussed diversion of rivers such as the Yellow or the Yangtze for agricultural use is likely to cause the renewal of Bottom Water formation in the Japan/East Sea. Such ...

Doron Nof

2001-04-01T23:59:59.000Z

247

Strain Response of Hot-Mix Asphalt Overlays for Bottom-Up Reflective Cracking  

E-Print Network (OSTI)

This paper examines the strain response of typical HMA overlays above jointed PCC slabs prone to bottom-up reflective cracking. The occurrence of reflective cracking under the combined effect of traffic and environmental loading significantly reduces the design life of the HMA overlays and can lead to its premature failure. In this context, viscoelastic material properties combined with cyclic vehicle loadings and pavement temperature distribution were implemented in a series of FE models in order to study the evolution of horizontal tensile and shear strains at the bottom of the HMA overlay. The effect of several design parameters, such as subbase and subgrade moduli, vehicle speed, overlay thickness, and temperature condition, on the horizontal and shear strain response was investigated. Results obtained show that the rate of horizontal and shear strain increase at the bottom of the HMA overlay drop with higher vehicle speed, higher subgrade modulus, and higher subbase modulus. Moreover, the rate of horizontal strain accumulation increases with higher overlay thickness. Although initial strain values were higher at positive pavement temperature distributions, the corresponding rate of strain increase were higher at negative pavement temperatures. Finally, an extrapolation of the strain history curve for various pavement design parameters was used to estimate the number of cycles for bottom-up crack initiation.

Ziad G. Ghauch; Grace G. Abou Jaoude

2011-10-11T23:59:59.000Z

248

On the Structure of Turbulence in the Bottom Boundary Layer of the Coastal Ocean  

Science Conference Proceedings (OSTI)

Six sets of particle image velocimetry (PIV) data from the bottom boundary layer of the coastal ocean are examined. The data represent periods when the mean currents are higher, of the same order, and much weaker than the wave-induced motions. ...

W. A. M. Nimmo Smith; J. Katz; T. R. Osborn

2005-01-01T23:59:59.000Z

249

Effect of Top and Bottom Boundary Conditions on Symmetric Instability under Full-Component Coriolis Force  

Science Conference Proceedings (OSTI)

The linear stability of a zonal flow confined in a domain within horizontal top and bottom boundaries is examined under full consideration of the Coriolis force. The basic zonal flow is assumed to be in thermal wind balance with the density field ...

Toshihisa Itano; Akira Kasahara

2011-11-01T23:59:59.000Z

250

Contribution of Boussinesq pressure and bottom roughness terms for open channel flows with shocks  

Science Conference Proceedings (OSTI)

For high-velocity flows accompanied with hydraulic jump, this paper attempts to evaluate the contribution of non-hydrostatic (i.e., Boussinesq) pressure term and the bottom roughness coefficient. To perform this analysis, we have solved the one-dimensional ... Keywords: high resolution, hydraulic jump, hydrostatic, modeling, shocks

Prasada Rao

2002-12-01T23:59:59.000Z

251

Cyclonic Spirals in Tidally Accelerating Bottom Boundary Layers in the Zhujiang (Pearl River) Estuary  

Science Conference Proceedings (OSTI)

A velocity spiral in the tidally accelerating bottom boundary layer (BBL) was defined as a directional shear of the prevailing flow with the elevation and the tidal phase. However, so far there is no information on the spiral for the oscillatory ...

Jiaxue Wu; Huan Liu; Jie Ren; Junjie Deng

2011-06-01T23:59:59.000Z

252

Bottom Currents near a Small Hill on the Maderia Abyssal Plain  

Science Conference Proceedings (OSTI)

Near-bottom currents at depths in exceeds of 5000 m have been measured in the Great Meteor East study area (near 3130?N, 25W) over a 3 year period. The sites selected were on top of a small abyssal hill, on its flank, and on the abyssal plain ...

Peter M. Saunders

1988-06-01T23:59:59.000Z

253

The Interaction between the Bottom Mixed layer and Mesoscale Motions of the Ocean: A Numerical Study  

Science Conference Proceedings (OSTI)

The interaction between a bottom mixed layer and a mesoscale eddy field is studied using a numerical model of a two-layer quasi-geostrophic fluid above a mixed layer. The height of the mixed layer is assumed to be restricted by stratification. A ...

K. J. Richards

1984-04-01T23:59:59.000Z

254

Transequatorial Flow of Antarctic Bottom Water in the Western Atlantic Ocean: Abyssal Geostrophy at the Equator  

Science Conference Proceedings (OSTI)

In its general northward flow along the western trough of the Atlantic, Antarctic Bottom Water (AABW) must pass over several sills separating the various abyssal basins. At the equator, the western trough is deformed by major east-west offsets of ...

M. S. McCartney; R. A. Curry

1993-06-01T23:59:59.000Z

255

Bottom-up superconducting and Josephson junction devices inside a Group-IV semiconductor  

E-Print Network (OSTI)

We propose superconducting devices made from precision hole-doped regions within a silicon (or germanium) single crystal. We analyze the properties of this superconducting semiconductor and show that practical superconducting wires, Josephson tunnel junctions or weak links, SQUIDs, and qubits are realizable. This work motivates the pursuit of bottom-up superconductivity for improved or fundamentally different technology and physics.

Yun-Pil Shim; Charles Tahan

2013-08-30T23:59:59.000Z

256

An Experimental Study of Baroclinic Flows with and without Two-Wave Bottom Topography  

Science Conference Proceedings (OSTI)

A series of laboratory experiments was performed in a thermally-driven rotating annulus of fluid with and without two-wave bottom topography. Velocity measurements were made by illuminating a thin layer of fluid at mid-depth and photographing ...

Guo-Qing Li; Robin Kung; Richard L. Pfeffer

1986-11-01T23:59:59.000Z

257

Untrawlable Bottom in Shrimp Statistical Zones of the Northwest Gulf of Mexico  

E-Print Network (OSTI)

Untrawlable Bottom in Shrimp Statistical Zones of the Northwest Gulf of Mexico Introduction The shrimping industry in the Gulf of Mexico has criticized the bycatch reduc tion plans of the Gulf of Mexico.edu. ABSTRACT-The Gulf of Mexico Fish eries Management Council tasked the Na tional Marine Fisheries Service

258

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.

259

Tracing Southwest Pacific Bottom Water Using Potential Vorticity and Helium-3  

Science Conference Proceedings (OSTI)

This study uses potential vorticity and other tracers to identify the pathways of the densest form of Circumpolar Deep Water in the South Pacific, termed Southwest Pacific Bottom Water (SPBW), along the 28.2 kg m?3 surface. This study focuses on ...

Stephanie M. Downes; Robert M. Key; Alejandro H. Orsi; Kevin G. Speer; James H. Swift

2012-12-01T23:59:59.000Z

260

Russell Hulse, the First Binary Pulsar, and Science Education  

NLE Websites -- All DOE Office Websites (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.

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

Mock LISA data challenge for the Galactic white dwarf binaries  

SciTech Connect

We present data analysis methods used in the detection and estimation of parameters of gravitational-wave signals from the white dwarf binaries in the mock LISA data challenge. Our main focus is on the analysis of challenge 3.1, where the gravitational-wave signals from more than 6x10{sup 7} Galactic binaries were added to the simulated Gaussian instrumental noise. The majority of the signals at low frequencies are not resolved individually. The confusion between the signals is strongly reduced at frequencies above 5 mHz. Our basic data analysis procedure is the maximum likelihood detection method. We filter the data through the template bank at the first step of the search, then we refine parameters using the Nelder-Mead algorithm, we remove the strongest signal found and we repeat the procedure. We detect reliably and estimate parameters accurately of more than ten thousand signals from white dwarf binaries.

Blaut, Arkadiusz; Babak, Stanislav; Krolak, Andrzej [Institute of Theoretical Physics, University of Wroclaw, Pl. Maxa Borna 9, Pl-50-204 Wroclaw (Poland); Albert Einstein Institute, Am Muchlenberg 1, D-14476 Golm (Germany); Institute of Mathematics, Polish Academy of Sciences, Sniadeckich 8, 00-950 Warsaw (Poland) and Andrzej Soltan Institute for Nuclear Studies, 05-400 Swierk-Otwock (Poland)

2010-03-15T23:59:59.000Z

262

Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures  

SciTech Connect

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

263

Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures  

SciTech Connect

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.

2011-02-14T23:59:59.000Z

264

Short period eclipsing binary candidates identified using SuperWASP  

E-Print Network (OSTI)

We present light curves and periods of 53 candidates for short period eclipsing binary stars identified by SuperWASP. These include 48 newly identified objects with periods <2x10^4 seconds (~0.23d), as well as the shortest period binary known with main sequence components (GSC2314-0530 = 1SWASP J022050.85+332047.6) and four other previously known W UMa stars (although the previously reported periods for two of these four are shown to be incorrect). The period distribution of main sequence contact binaries shows a sharp cut-off at a lower limit of around 0.22d, but until now, very few systems were known close to this limit. These new candidates will therefore be important for understanding the evolution of low mass stars and to allow investigation of the cause of the period cut-off.

Norton, A J; Evans, T; West, R G; Wheatley, P J; Anderson, D R; Barros, S C C; Butters, O W; Cameron, A Collier; Christian, D J; Enoch, B; Faedi, F; Haswell, C A; Hellier, C; Holmes, S; Horne, K D; Lister, T A; Maxted, P F L; Parley, N; Pollacco, D; Simpson, E K; Skillen, I; Smalley, B; Southworth, J; Street, R A

2011-01-01T23:59:59.000Z

265

Binary fish passage models for uniform and nonuniform flows  

Science Conference Proceedings (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

266

COMPACT BINARY PROGENITORS OF SHORT GAMMA-RAY BURSTS  

SciTech Connect

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

267

Bottom Frame  

NLE Websites -- All DOE Office Websites (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

268

Bounding the mass of the graviton using binary pulsar observations  

E-Print Network (OSTI)

The close agreement between the predictions of dynamical general relativity for the radiated power of a compact binary system and the observed orbital decay of the binary pulsars PSR B1913+16 and PSR B1534+12 allows us to bound the graviton mass to be less than 7.6 x 10^{-20} eV with 90% confidence. This bound is the first to be obtained from dynamic, as opposed to static-field, relativity. The resulting limit on the graviton mass is within two orders of magnitude of that from solar system measurements, and can be expected to improve with further observations.

Lee Samuel Finn; Patrick J. Sutton

2001-09-13T23:59:59.000Z

269

Interacting black holes on the brane: the seeding of binaries  

E-Print Network (OSTI)

We consider the evolution of sub-horizon-sized black holes which are formed during the high energy phase of the braneworld scenario. These black holes are long-lived due to modified evaporation and accretion of radiation during the radiation dominated era. We argue that an initial mass difference between any two neighbouring black holes is always amplified because of their exchange of energy with the surrounding radiation. We present a scheme of binary formation based on mass differences suggesting that such a scenario could lead to binaries with observable signatures.

A. S. Majumdar; A. Mehta; J. M. Luck

2003-11-06T23:59:59.000Z

270

A Numerical Study of the Interaction between a Deep Cold Jet and the Bottom Boundary Layer of the Ocean  

Science Conference Proceedings (OSTI)

A two-dimensional (x-z) primitive equation model is used to study the interaction between a deep cold jet on a sloping bottom and the bottom boundary layer (BBL) of the deep ocean. Two closure schemes are used: a standard second order turbulence ...

Tal Ezer; Georges L. Weatherly

1990-06-01T23:59:59.000Z

271

Binary Segmentation of Video Sequences in Real Time Francisco J. HernandezLopez and Mariano Rivera  

E-Print Network (OSTI)

Binary Segmentation of Video Sequences in Real Time Francisco J. Hernandez­Lopez and Mariano Rivera [8, 9]. Francisco Hernandez-Lopez and Mariano Rivera, Binary Segmentation of Video Sequences in Real

Rivera, Mariano

272

T-561: IBM and Oracle Java Binary Floating-Point Number Conversion...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

273

A complete minimal system of covariants for the binary form of degree 7  

Science Conference Proceedings (OSTI)

A minimal system of 147 homogeneous generators of the algebra of covariants for the binary form of degree 7 is calculated. Keywords: Classical invariant theory, Covariants of binary form, Derivations

Leonid Bedratyuk

2009-02-01T23:59:59.000Z

274

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 using acoustic techniques to make maps of bay bottom types and to investigate the types and extent of anthropogenic impacts. A total of 31 km2 was surveyed in six areas, one in Bolivar Roads (6.1 km2), one near Redfish Bar (3.1 km2), two in East Bay (12 km2), one southeast of the Clear Lake entrance (5.3 km2), and one in Trinity Bay (4.3 km2). Sidescan sonars (100 kHz and 600 kHz) were used to image the bay bottom, and a chirp sonar (2-12 kHz) was used to image subsurface sediment layers and bottom topography. In the side-scan records, objects as small as a few meters in extent were visible, whereas the chirp sonar records show a vertical resolution of a few tens of centimeters. The sidescan images display strong backscatter in some areas due to coarse sediments in addition to weak backscatter in areas of fine sediment. The bay bottom was classified using three levels of sonar backscatter ranging from high to low. Areas of differing sonar backscatter intensity were sampled with cores and grab-samples. High backscatter corresponded to coarse shell debris and oyster reefs, medium backscatter corresponded to a sand-silt-shell mixture, and low backscatter corresponded to silty loam. Chirp sonar records were classified as one of nine different bottom reflection types based on changes in amplitude and stratigraphy. Parallel, layered sediments are seen filling the bay valley and resting atop a sharp contact at which the acoustic signal fades out. Along the flanks of the valley fill the acoustic response revealed an absent or weakly laminated stratigraphy, whereas areas of high oyster productivity produced mounds, strong surface returns, and strong, shallow subsurface reflectors surrounding current oyster reefs. Anthropogenic features imaged with the sonar included sediment disruptions, such as the ship channels, dredge holes, gouges, and trawl marks, as well as debris, such as submerged boats, pipes, and unidentified objects.

Maddox, Donald Shea

2005-12-01T23:59:59.000Z

275

binOb+: a framework for potent and stealthy binary obfuscation  

Science Conference Proceedings (OSTI)

Reverse engineering is the process of discovering a high-level structure and its semantics from a lower-level structure. In order to prevent malicious use of reverse engineering against binaries, various techniques have been developed called binary obfuscation. ... Keywords: binary obfuscation, exception handling, reverse engineering, stealth, windows SEH

Byoungyoung Lee; Yuna Kim; Jong Kim

2010-04-01T23:59:59.000Z

276

THE ROLE OF KOZAI CYCLES IN NEAR-EARTH BINARY ASTEROIDS  

SciTech Connect

We investigate the Kozai mechanism in the context of near-Earth binaries and the Sun. The Kozai effect can lead to changes in eccentricity and inclination of the binary orbit, but it can be weakened or completely suppressed by other sources of pericenter precession, such as the oblateness of the primary body. Through numerical integrations including primary oblateness and three bodies (the two binary components and the Sun), we show that Kozai cycles cannot occur for the closely separated near-Earth binaries in our sample. We demonstrate that this is due to pericenter precession around the oblate primary, even for very small oblateness values. Since the majority of observed near-Earth binaries are not well separated, we predict that Kozai cycles do not play an important role in the orbital evolution of most near-Earth binaries. For a hypothetical wide binary modeled after 1998 ST27, the separation is large at 16 primary radii and so the orbital effects of primary oblateness are lessened. For this wide binary, we illustrate the possible excursions in eccentricity and inclination due to Kozai cycles as well as depict stable orientations for the binary's orbital plane. Unstable orientations lead to collisions between binary components, and we suggest that the Kozai effect acting in wide binaries may be a route to the formation of near-Earth contact binaries.

Fang, Julia; Margot, Jean-Luc [Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)

2012-03-15T23:59:59.000Z

277

A constrained binary knapsack approximation for shortest path network interdiction  

Science Conference Proceedings (OSTI)

A modified shortest path network interdiction model is approximated in this work by a constrained binary knapsack which uses aggregated arc maximum flow as the objective function coefficient. In the modified shortest path network interdiction problem, ... Keywords: Approximation techniques, Homeland security, Integer programming, Network interdiction

Justin Yates; Kavitha Lakshmanan

2011-11-01T23:59:59.000Z

278

Binary pulsar shock emissions as galactic gamma-ray sources  

E-Print Network (OSTI)

We address several issues regarding the interpretation of galactic \\ggg-ray sources. We consider powerful pulsars in binaries producing X-ray and gamma-ray {\\it unpulsed} emission from the shock interaction of relativistic pulsar winds with circumbinary material. Nebular mass outflows from companion stars of binary pulsars can provide the right {\\it calorimeters} to transform a fraction of the electromagnetic and kinetic energy of pulsar winds into high energy radiation. We discuss the physics of interaction of relativistic pulsar winds with gaseous material and show that the conditions in pulsar binary systems might be ideal to constrain shock acceleration mechanisms and pulsar wind composition and structure. We briefly discuss the example of the 47~ms pulsar PSR~1259-63 orbiting around a massive Be~star companion and monitored by X-ray and gamma-ray instruments during its recent periastron passage. In addition to young pulsars in massive binaries, also a class of recycled millisecond pulsars in low-mass bin...

Tavani, M

1995-01-01T23:59:59.000Z

279

Ph.D.Thesis Binary inversion of gravity  

E-Print Network (OSTI)

Ph.D.Thesis Binary inversion of gravity data for salt imaging Richard A. Krahenbuhl Center for Gravity, Electrical & Magnetic Studies Colorado School of Mines Department of Geophysics Colorado School of gravity data for salt imaging Richard A. Krahenbuhl Center for Gravity, Electrical & Magnetic Studies

280

Final Binary Stars Results From The VLT Lunar Occultations Program  

E-Print Network (OSTI)

We report on 13 sub-arcsecond binaries, detected by means of lunar occultations in the near-infrared at the ESO Very Large Telescope. They are all first-time detections, except for the visual binary HD~158122 which we resolved for the first time in the near infrared. The primaries have magnitudes in the range $K$=4.5 to 10.0, and the companions in the range $K$=6.8 to 11.1. The magnitude differences have a median value of 2.4, with the largest being 4.6. The projected separations are in the range 4 to 168 milliarcseconds with a median of 13 milliarcseconds. We discuss and compare our results with the available literature. With this paper, we conclude the mining for binary star detections in the volume of 1226 occultations recorded at the VLT with the ISAAC instrument. We expect that the majority of these binaries may be unresolvable by adaptive optics on current telescopes, and they might be challenging for long-baseline interferometry. However they constitute an interesting sample for future larger telescope...

Richichi, Andrea; Cusano, Felice; Ivanov, Valentin

2014-01-01T23:59:59.000Z

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.


281

Heber Geothermal Binary Demonstration Plant: Design, Construction, and Early Startup  

Science Conference Proceedings (OSTI)

Binary-cycle technology could almost double the electric energy yield from known hydrothermal resources. The 45-MWe Heber geothermal demonstration plant--now in a three-year test and demonstration program--has successfully passed through a series of feasibility studies, design stages, and field experiments that show its promise to tap these resources.

1987-10-09T23:59:59.000Z

282

Portable execution of legacy binaries on the Java virtual machine  

Science Conference Proceedings (OSTI)

The move toward pure managed-code environments is held back by the vast amount of legacy software available only as statically compiled binaries for some legacy instruction set architecture (ISA). Catering to this legacy software requires all sorts of ... Keywords: legacy software, system emulation

Alexander Yermolovich; Andreas Gal; Michael Franz

2008-09-01T23:59:59.000Z

283

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

284

Advanced binary geothermal power plants: Limits of performance  

SciTech Connect

The Heat Cycle Research Program is currently investigating the potential improvements to power cycles utilizing moderate temperature geothermal resources to produce electrical power. Investigations have specifically examined Rankine cycle binary power systems. Binary Rankine cycles are more efficient than the flash steam cycles at moderate resource temperatures, achieving a higher net brine effectiveness. At resource conditions similar to those at the Heber binary plant, it has been shown that mixtures of saturated hydrocarbons (alkanes) or halogenated hydrocarbons operating with a supercritical Rankine cycle gave improved performance over Rankine cycles with the pure working fluids executing single boiling cycles. Recently, in addition to the supercritical Rankine Cycle, other types of cycles have been proposed for binary geothermal service. This paper explores the limits on efficiency of a feasibility plant and discusses the methods used in these advanced concept plants to achieve the maximum possible efficiency. The advanced plants considered appear to be approaching the feasible limit of performance so that the designer must weigh all considerations to find the best plant for a given service. 16 refs., 12 figs.

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

1990-01-01T23:59:59.000Z

285

Combining subsumption and binary methods: an object calculus with views  

Science Conference Proceedings (OSTI)

We presen t an object-oriented calculus whic hallows arbitrary hiding of methods in protot ypes, even in the presence of binary methods and friend functions. This combination of features permits complete control of the in terface a class exposes to the ...

Jrme Vouillon

2001-01-01T23:59:59.000Z

286

On complexity of optimal recombination for binary representations of solutions  

Science Conference Proceedings (OSTI)

We consider the optimization problem of finding the best possible offspring as a result of a recombination operator in an evolutionary algorithm, given two parent solutions. The optimal recombination is studied in the case where a vector of binary variables ... Keywords: Complexity, evolutionary algorithm, optimal recombination, optimized crossover

Anton V. Eremeev

2008-03-01T23:59:59.000Z

287

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.degree. C. before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil.

Miller, Robert N. (Allentown, PA)

1986-01-01T23:59:59.000Z

288

Overcoming JVM HotSwap constraints via binary rewriting  

Science Conference Proceedings (OSTI)

Java HotSpot VM provides a facility for replacing classes at runtime called HotSwap. One design property of HotSwap is that the signature of a replaced class must remain the same between different versions, which significantly constrains the programmer ... Keywords: HotSwap, JVM languages, binary refactoring, virtual superclass

Dong Kwan Kim; Eli Tilevich

2008-10-01T23:59:59.000Z

289

Description of interest regions with local binary patterns  

Science Conference Proceedings (OSTI)

This paper presents a novel method for interest region description. We adopted the idea that the appearance of an interest region can be well characterized by the distribution of its local features. The most well-known descriptor built on this idea is ... Keywords: Image matching, Local binary patterns, Object recognition, Region description, Region detection, SIFT

Marko Heikkil; Matti Pietikinen; Cordelia Schmid

2009-03-01T23:59:59.000Z

290

Binary populations and stellar dynamics in young clusters  

E-Print Network (OSTI)

We first summarize work that has been done on the effects of binaries on theoretical population synthesis of stars and stellar phenomena. Next, we highlight the influence of stellar dynamics in young clusters by discussing a few candidate UFOs (unconventionally formed objects) like intermediate mass black holes, Eta Carinae, Zeta Puppis, Gamma Velorum and WR 140.

D. Vanbeveren; H. Belkus; J. Van Bever; N. Mennekens

2008-01-17T23:59:59.000Z

291

Binary populations and stellar dynamics in young clusters  

E-Print Network (OSTI)

We first summarize work that has been done on the effects of binaries on theoretical population synthesis of stars and stellar phenomena. Next, we highlight the influence of stellar dynamics in young clusters by discussing a few candidate UFOs (unconventionally formed objects) like intermediate mass black holes, Eta Carinae, Zeta Puppis, Gamma Velorum and WR 140.

Vanbeveren, D; Van Bever, J; Mennekens, N

2008-01-01T23:59:59.000Z

292

A binary LP model to the facility layout problem Abstract  

E-Print Network (OSTI)

Domschke and Drexl [4] and the other by Francis, McGinnis and White [5], ... In this paper a simple pure-binary linear programming (PBLP) model has been developed to find the ..... AB AC AD AE AF BC BD BE BF CD CE CF DE DF EF. 12. X*.

293

Application for testing control configurations of binary distillation columns  

Science Conference Proceedings (OSTI)

The paper addresses the problem of testing various control configurations for binary distillation columns. Analyzing from plantwide control point of view the place of distillation column within the plant, the result will be the best control configuration. ... Keywords: composition control, distillation columns, dynamic simulations, plantwide control

Sanda Mihalache; Marian Popescu

2007-08-01T23:59:59.000Z

294

Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order.  

E-Print Network (OSTI)

ar X iv :h ep -p h/ 04 01 05 6v 1 9 Ja n 20 04 Cavendish-HEP-04/01 LBNL-54251 Threshold corrections in bottom and charm quark hadroproduction at next-to-next-to-leading order Nikolaos Kidonakisa and Ramona Vogtb aCavendish Laboratory, University... be either qq or gg. A more detailed discussion of the kinematics can be found in Ref. [2]. In 1PI kinematics, a single heavy quark is identified so that i(pa) + j(pb) ?? Q(p1) +X[Q](p2) (2.1) where Q is the identified bottom or charm quark of mass m and X...

Kidonakis, Nikolaos; Vogt, Ramona

295

GEODYN2: a bottom hole assembly. Geological formation dynamic interaction computer program  

DOE Green Energy (OSTI)

This paper describes the current development of a three-dimensional transient dynamic finite element computer program, GEODYN2, capable of simulating the behavior of a rotating bottom hole assembly (BHA) interacting with a non-uniform formation. The GEODYN2 Program facilitates a very detailed analysis/simulation of the behavior of a BHA with a polycrystalline diamond compact (PDC) bit and various stabilizer designs. The basic drill string mechanics implemented within the program, the overall algorithm, and the more pertinent modeling features which permit this level of analysis are briefly outlined. The implementation of these features and how they allow calculation of the response behavior of a bottom hole assembly are demonstrated. Although the development and enhancement of modeling capabilities within GEODYN2 is ongoing, it is anticipated that the preliminary verification results thus far generated will further the understanding of the response behavior of BHAs. 9 refs., 16 figs.

Baird, J.A.; Caskey, B.C.; Wormley, D.N.; Stone, C.M.

1985-01-01T23:59:59.000Z

296

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

Science Conference Proceedings (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

297

Materials Reliability Program: PWR Bottom Mounted Nozzle (BMN) Issue Response Handbook (MRP-372)  

Science Conference Proceedings (OSTI)

Resolution of a case of primary water stress corrosion cracking (PWSCC) detected in a bottom mounted nozzle (BMN) could be expected to require substantial utility resources, even if only a single nozzle were to be affected, because of the challenges in accessing it in pressurized water reactors (PWRs) to perform inspections and repairs. This Handbook compiles the available knowledge and reference information to guide utility development of a site-specific response plan to an emergent BMN ...

2013-11-14T23:59:59.000Z

298

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

299

KEPLER ECLIPSING BINARY STARS. III. CLASSIFICATION OF KEPLER ECLIPSING BINARY LIGHT CURVES WITH LOCALLY LINEAR EMBEDDING  

Science Conference Proceedings (OSTI)

We present an automated classification of 2165 Kepler eclipsing binary (EB) light curves that accompanied the second Kepler data release. The light curves are classified using locally linear embedding, a general nonlinear dimensionality reduction tool, into morphology types (detached, semi-detached, overcontact, ellipsoidal). The method, related to a more widely used principal component analysis, produces a lower-dimensional representation of the input data while preserving local geometry and, consequently, the similarity between neighboring data points. We use this property to reduce the dimensionality in a series of steps to a one-dimensional manifold and classify light curves with a single parameter that is a measure of 'detachedness' of the system. This fully automated classification correlates well with the manual determination of morphology from the data release, and also efficiently highlights any misclassified objects. Once a lower-dimensional projection space is defined, the classification of additional light curves runs in a negligible time and the method can therefore be used as a fully automated classifier in pipeline structures. The classifier forms a tier of the Kepler EB pipeline that pre-processes light curves for the artificial intelligence based parameter estimator.

Matijevic, Gal [Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana (Slovenia); Prsa, Andrej [Department of Astronomy and Astrophysics, Villanova University, 800 E Lancaster Ave, Villanova, PA 19085 (United States); Orosz, Jerome A.; Welsh, William F. [Department of Astronomy, San Diego State University, 5500 Campanile Dr., San Diego, CA 92182 (United States); Bloemen, Steven [Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven (Belgium); Barclay, Thomas, E-mail: gal.matijevic@fmf.uni-lj.si, E-mail: andrej.prsa@villanova.edu [NASA Ames Research Center/BAER Institute, Moffett Field, CA 94035 (United States)

2012-05-15T23:59:59.000Z

300

Detecting a Higgs Pseudoscalar with a Z Boson Produced in Bottom Quark Fusion  

E-Print Network (OSTI)

We investigate the prospects of detecting a Higgs pseudoscalar ($A^0$) in association with a $Z$ gauge boson produced from bottom quark fusion ($b\\bar{b} \\to ZA^0$) at the CERN Large Hadron Collider (LHC). A general two Higgs doublet model and the minimal supersymmetric standard model are adopted to study the discovery potential of $pp \\to ZA^0 \\to \\ell \\bar{\\ell} b\\bar{b} +X (\\ell = e, \\mu)$, via $b\\bar{b} \\to ZA^0$ with physics backgrounds and realistic cuts. Promising results are found for $m_A \\alt 400$ GeV in a general two Higgs doublet model when the heavier Higgs scalar ($H^0$) can decay into a $Z$ boson and a Higgs pseudoscalar ($H^0 \\to ZA^0$). We compare the production rates from bottom quark fusion ($b\\bar{b} \\to ZA^0$) and gluon fusion ($gg \\to ZA^0$) and find that they are complementary processes to produce $ZA^0$ in hadron collisions. While gluon fusion is the major source for producing a Higgs pseudoscalar associated with a $Z$ boson at the LHC for $\\tan\\beta \\alt 10$, bottom quark fusion can make dominant contributions for $\\tan\\beta \\agt 10$.

Chung Kao; Shankar Sachithanandam

2004-11-24T23:59:59.000Z

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

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

Science Conference Proceedings (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

302

Engineering a 70-percent efficient, indirect-fired fuel-cell bottomed turbine cycle  

SciTech Connect

The authors introduce the natural gas, indirect-fired fuel-cell bottomed turbine cycle (NG-IFFC) as a novel power plant system for the distributed power and on-site markets in the 20 to 200 megawatt (MW) size range. The NG-IFFC system is a new METC-patented system. This power-plant system links the ambient pressure, carbonate fuel cell in tandem with a gas turbine, air compressor, combustor, and ceramic heat exchanger. Performance calculations based on Advanced System for Process Engineering (ASPEN) simulations show material and energy balances with expected power output. Early results indicated efficiencies and heat rates for the NG-IFFC are comparable to conventionally bottomed, carbonate fuel-cell steam-bottomed cycles. More recent calculations extended the in-tandem concept to produce near-stoichiometric usage of the oxygen. This is made possible by reforming the anode stream to completion and using all hydrogen fuel in what will need to be a special combustor. The performance increases dramatically to 70%.

Williams, M.C.; Micheli, P.L.; Parsons, E.L. Jr.

1996-08-01T23:59:59.000Z

303

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

SciTech Connect

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

304

Utility-scale combined-cycle power systems with Kalina bottoming cycles  

SciTech Connect

A new power-generation technology, often referred to as the Kalina cycle, is being developed as a direct replacement for the Rankine steam cycle. It can be applied to any thermal heat source, low or high temperature. Among several Kalina cycle variations, there is one that is particularly well suited as a bottoming cycle for utility combined-cycle applications. It is the subject of this paper. Using an ammonia/water mixture as the working fluid and a condensing system based on absorption-refrigeration principles, the Kalina bottoming cycle outperforms a triple-pressure steam cycle by 16%. Additionally, this version of the Kalina cycle is characterized by an intercooling feature between turbine stages, diametrically opposite to normal reheating practice in steam plants. Energy and mass balances are presented for a 200-MW(electric) Kalina bottoming cycle. Kalina cycle performance is compared to a triple-pressure steam plant. Energy and mass balances are presented as well for a 200-MW(electric) Kalina direct-fired cycle designed for utility purposes.

Kalina, A.I.

1987-01-01T23:59:59.000Z

305

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

306

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.

Fife, Alex Blair (San Jose, CA); Ballas, Gary J. (San Jose, CA)

1998-01-01T23:59:59.000Z

307

Municipal solid waste incineration bottom ash: Characterization and kinetic studies of organic matter  

SciTech Connect

Bottom ash is the main solid residue which is produced by municipal solid waste incineration (MSWI) facilities. To be reused in public works, it has to be stored previously a few months. This material is composed primarily of a mineral matrix but also contains unburnt organic matter. The mineral content and its change in the course of aging are relatively well-known, in contrast with the organic content. So in order to detect the phenomena responsible for changes in organic matter and their effects during aging, the concentrations of the main organic compounds previously characterized, the number of microorganisms, and the release of carbon dioxide were followed kinetically in model laboratory conditions. The results showed that the aging process led to the natural biodegradation of the organic matter available in bottom ash, composed essentially of carboxylic acids and n-alkanes (steroids and PAH`s to a lesser extent), and consequently that it would improve the bottom ash quality. Furthermore these results were confirmed by the study of aging conducted in conditions used in the industrial scale.

Dugenest, S.; Casabianca, H.; Grenier-Loustalot, M.F. [Centre National de la Recherche Scientifique, Vernaison (France). Service central d`Analyse; Combrisson, J. [Univ. Claude Bernard-Lyon I, Villeurbanne (France). Lab. d`Ecologie Microbienne du Sol

1999-04-01T23:59:59.000Z

308

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

E-Print Network (OSTI)

The South Texas Project Electrical Generating Station (STPEGS operating license directs that an effective radiological environmental monitoring program be established. Site- specific data should then augment the generation of an accurate dose model. 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 in conjunction with a compass to locate sampling stations. A DietzLafond bottom sampler was used to collect 70 sediment samples from 56 stations with 14 stations being sampled in duplicate. Sample analysis utilized proven standardized procedures and conventional gamma spectroscopy techniques to analyze a typical 0.7 kg sample. Count times were 6-15 hrs depending on the measurability of the radionuclide of interest or the lower limit of detection (approximately 9 pCi/kg dry) for "58CO, '60CO, and 137Cs. An inventory of "58Co, 6OCo, and 137CS in the MCR was estimated from plant effluent release records. Comparisons were made between the release records and the totals derived from the analysis of the bottom sediment. A predictive model of MCR bottom sediment activity was made. The reservoir's '60Co inventory is predicted to increase to 9.2 Ci by the year 2029. The analysis of bottom sediments suggests that 42% of the 60Co is captured in the sediment; however, analysis of other MCR media (e.g., water, biologicals) suggests that the retention percentage is in fact significantly greater. The majority of the '60Co laden sediment is found in the regions of the MCR nearest the effluent release point (MCR circulation discharge facility). The predictive model shows that the 6OCo concentration will decay to current levels approximately 15 yrs after decommissioning. This situation can be induced earlier if the source term is reduced by implementing a successful cobalt reduction program and/or the liquid waste processing system. At no point during projected plant operations or post operation does 60Co in the MCR system result in a significant dose to the public.

Blankinship, David Randle

1993-01-01T23:59:59.000Z

309

Bottom Stress Estimates and their Prediction on the Northern California Continental Shelf during CODE-1: The Importance of Wave-Current Interaction  

Science Conference Proceedings (OSTI)

High quality near-bottom boundary layer measurements obtained at a midshelf location (90 m water depth) in the CODE region off Northern California are described. Bottom tripod velocity measurements and supporting data obtained during typical ...

William D. Grant; Albert J. Williams III; Scott M. Glenn

1984-03-01T23:59:59.000Z

310

BINARY FREQUENCIES IN A SAMPLE OF GLOBULAR CLUSTERS. I. METHODOLOGY AND INITIAL RESULTS  

SciTech Connect

Binary stars are thought to be a controlling factor in globular cluster evolution, since they can heat the environmental stars by converting their binding energy to kinetic energy during dynamical interactions. Through such interaction, the binaries determine the time until core collapse. To test predictions of this model, we have determined binary fractions for 35 clusters. Here we present our methodology with a representative globular cluster NGC 4590. We use Hubble Space Telescope archival Advanced Camera for Surveys data in the F606W and F814W bands and apply point-spread-function-fitting photometry to obtain high quality color-magnitude diagrams. We formulate the star superposition effect as a Poisson probability distribution function, with parameters optimized through Monte Carlo simulations. A model-independent binary fraction of (6.2 {+-} 0.3)% is obtained by counting stars that extend to the red side of the residual color distribution after accounting for the photometric errors and the star superposition effect. A model-dependent binary fraction is obtained by constructing models with a known binary fraction and an assumed binary mass-ratio distribution function. This leads to a binary fraction range of 6.8%-10.8%, depending on the assumed shape to the binary mass-ratio distribution, with the best fit occurring for a binary distribution that favors low mass ratios (and higher binary fractions). We also represent the method for radial analysis of the binary fraction in the representative case of NGC 6981, which shows a decreasing trend for the binary fraction toward the outside, consistent with theoretical predictions for the dynamical effect on the binary fraction.

Ji Jun; Bregman, Joel N., E-mail: jijun@umich.edu, E-mail: jbregman@umich.edu [Department of Astronomy, University of Michigan, Ann Arbor, MI 48109 (United States)

2013-05-10T23:59:59.000Z

311

A Close Binary Star Resolved from Occultation by 87 Sylvia  

E-Print Network (OSTI)

The star BD+29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by some 80 km apart. Two flux drops were observed at one site, whereas only one flux drop was detected at the other. From the long-term variation of Sylvia, we inferred the probable shape of the shadow during the occultation, and this in turn constrains the binary parameters: the two components of BD+29 1748 have a projected separation of 0.097" to 0.110" on the sky with a position angle 104 deg to 107 deg. The asteroid was clearly resolved with a size scale ranging from 130 to 290 km, as projected onto the occultation direction. No occultation was detected for either of the two known moonlets of 87 Sylvia.

Lin, Chi-Long; Chen, W P; King, Sun-Kun; Lin, Hung-Chin; Bianco, F B; Lehner, M J; Coehlo, N K; Wang, J -H; Mondal, S; Alcock, C; Axelrod, T; Byun, Y -I; Cook, K H; Dav, R; De Pater, I; Porrata, R; Kim, D -W; Lee, T; Lissauer, J J; Marshall, S L; Rice, J A; Schwamb, M E; Wang, S -Y; Wen, C -Y

2009-01-01T23:59:59.000Z

312

Jordan-Wigner formalism for classical simulation beyond binary matchgates  

E-Print Network (OSTI)

The unitary matchgate circuits introduced by Valiant provide an interesting class of quantum circuits that are classically efficiently simulatable. They were shown by Terhal & DiVincenzo and Knill to be related to the physics of non-interacting fermions. The Jordan-Wigner (JW) formalism provides an efficient classical simulation of the latter, which turns out to be equivalent to the restricted case of circuits of binary (2-qubit) matchgates. Valiant's formalism allows further unitary gates: in particular we may include arbitrary 1-qubit gates on the first qubit line at any stage within a binary matchgate circuit. In this note we show how the JW formalism may be extended to provide an efficient classical simulation of such extended circuits, and we show how the simulability also follows from some elementary Lie algebra theory. The essential ingredients have been indicated previously by Knill in a condensed and abstract form, and our purpose is to make these results explicit and transparent.

Richard Jozsa; Akimasa Miyake

2013-11-13T23:59:59.000Z

313

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

314

Mechanisms producing fissionlike binary fragments in heavy collisions  

E-Print Network (OSTI)

The mixing of the quasifission component to the fissionlike cross section causes ambiguity in the quantitative estimation of the complete fusion cross section from the observed angular and mass distributions of the binary products. We show that the partial cross section of quasifission component of binary fragments covers the whole range of the angular momentum values leading to capture. The calculated angular momentum distributions for the compound nucleus and dinuclear system going to quasifission may overlap: competition between complete fusion and quasifission takes place at all values of initial orbital angular momentum. Quasifission components formed at large angular momentum of the dinuclear system can show isotropic angular distribution and their mass distribution can be in mass symmetric region similar to the characteristics of fusion-fission components. As result the unintentional inclusion of the quasifission contribution into the fusion-fission fragment yields can lead to overestimation of the probability of the compound nucleus formation.

A. K. Nasirov; A. I. Muminov; G. Giardina; G. Mandaglio; M. Manganaro

2009-12-11T23:59:59.000Z

315

Supersaturated Turbine Expansions for Binary Geothermal Power Plants  

DOE Green Energy (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

316

A Study of Baroclinic Wave Behavior over Bottom Topography Using Complex Principal Component Analysis of Experimental Data  

Science Conference Proceedings (OSTI)

Complex principal component analysis is applied to data from three laboratory experiments of flow over two-wave sinusoidal bottom topography in a thermally driven, rotating annulus of fluid. The experiments are conducted at the same imposed ...

Richard L. Pfeffer; Jon Ahlquist; Robin Kung; Yehui Chang; Guoqing Li

1990-01-01T23:59:59.000Z

317

Time Series Measurements of Chlorophyll Fluorescence in the Oceanic Bottom Boundary Layer with a Multisensor Fiber-Optic Fluorometer  

Science Conference Proceedings (OSTI)

An in situ multisensor fiber-optic fluorometer (MFF) has been developed to acquire long-term chlorophyll fluorescence measurements in the oceanic bottom boundary layer to characterize the finescale pigment structure at vertical spatial scales ...

Eurico J. DSa; Steven E. Lohrenz; Vernon L. Asper; Roy A. Walters

1997-08-01T23:59:59.000Z

318

The Vertical Structure of the Wave Bottom Boundary Layer over a Sloping Bed: Theory and Field Measurements  

Science Conference Proceedings (OSTI)

Theoretical solutions for the wave bottom boundary layer (WBL) over a sloping bed are compared with field measurements in the nearshore zone. The WBL theory is constructed using both viscoelasticdiffusion and conventional eddy viscosity ...

Qingping Zou; Alex E. Hay

2003-07-01T23:59:59.000Z

319

Response of an Oceanic Bottom Boundary Layer on a Slope to Interior Flow. Part I: Time-Independent Interior Flow  

Science Conference Proceedings (OSTI)

The behavior of oceanic boundary layers on a sloping bottom in the presence of stratification is investigated by the method of direct numerical simulations. The NavierStokes equations are decomposed into mean and turbulent components with the ...

Dave Ramsden

1995-07-01T23:59:59.000Z

320

Concepts for a bottom-mounted buoyant, stab-in cold water pipe for the OTEC program  

DOE Green Energy (OSTI)

A conceptual design for a bottom-mounted, stab-in cold water pipe (CWP) for OTEC is presented. The design concepts used are based on experience gained in the design of marine risers for offshore petroleum production. After a detailed description of the system envisioned and the installation scenario, the status of the major components in the system is discussed relative to the present state of the art in the oil industry. From preliminary structural analyses and cost projections, a comparison is then drawn between the bottom-mounted pipe and free-hanging CWP designs. The comparison shows the bottom-mounted concept to be technically and economically sound, utilizing present oil industry design practices. Finally, recommendations are made for further work to integrate the bottom-mounted CWP concept into the OTEC program.

Pompa, J.A.; Key, J.W.

1979-01-01T23:59:59.000Z

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.


321

The Modification of Bottom Boundary Layer Turbulence and Mixing by Internal Waves Shoaling on a Barrier Reef  

Science Conference Proceedings (OSTI)

Results are presented from an observational study of stratified, turbulent flow in the bottom boundary layer on the outer southeast Florida shelf. Measurements of momentum and heat fluxes were made using an array of acoustic Doppler velocimeters ...

Kristen A. Davis; Stephen G. Monismith

2011-11-01T23:59:59.000Z

322

A Large-Eddy Simulation Study of Bottom Heating Effects on Scalar Dispersion in and above a Cubical Building Array  

Science Conference Proceedings (OSTI)

Thermal effects on scalar dispersion in and above a cubical building array are numerically investigated using the parallelized large-eddy simulation model (PALM). Two cases (no heating and bottom heating) are simulated, and scalar dispersion ...

Seung-Bu Park; Jong-Jin Baik; Young-Hee Ryu

323

A Diagnosis of the Asymmetry in Top-Down and Bottom-Up Diffusion Using a Lagrangian Stochastic Model  

Science Conference Proceedings (OSTI)

A Lagrangian stochastic model of particle trajectories is used to investigate the asymmetry in vertical diffusion from area sources at the bottom and top of an inhomogeneous turbulent boundary layer. Such an asymmetry was discovered in the large-...

J. C. Weil

1990-02-01T23:59:59.000Z

324

Antarctic Bottom Water Warming and Freshening: Contributions to Sea Level Rise, Ocean Freshwater Budgets, and Global Heat Gain  

Science Conference Proceedings (OSTI)

Freshening and warming of Antarctic Bottom Water (AABW) between the 1980s and 2000s are quantified, assessing the relative contributions of water-mass changes and isotherm heave. The analysis uses highly accurate, full-depth, ship-based, ...

Sarah G. Purkey; Gregory C. Johnson

2013-08-01T23:59:59.000Z

325

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

Science Conference Proceedings (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

326

Distribution of Energy Spectra, Reynolds Stresses, Turbulence Production, and Dissipation in a Tidally Driven Bottom Boundary Layer  

Science Conference Proceedings (OSTI)

Seven sets of 2D particle image velocimetry data obtained in the bottom boundary layer of the coastal ocean along the South Carolina and Georgia coast [at the South Atlantic Bight Synoptic Offshore Observational Network (SABSOON) site] are ...

L. Luznik; W. Zhu; R. Gurka; J. Katz; W. A. M. Nimmo Smith; T. R. Osborn

2007-06-01T23:59:59.000Z

327

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

DOE Green Energy (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

328

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

NLE Websites -- All DOE Office Websites (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

329

Stellar Collisions and Ultracompact X-ray Binary Formation  

E-Print Network (OSTI)

(abridged) We report the results of SPH calculations of parabolic collisions between a subgiant or slightly evolved red-giant star and a neutron star (NS). Such collisions are likely to form ultracompact X-ray binaries (UCXBs) observed today in old globular clusters. In particular, we compute collisions of a 1.4 Msun NS with realistically modelled parent stars of initial masses 0.8 and 0.9 Msun, each at three different evolutionary stages (corresponding to three different radii R). The distance of closest approach for the initial orbit varies from 0.04 R (nearly head-on) to 1.3 R (grazing). These collisions lead to the formation of a tight binary, composed of the NS and the subgiant or red-giant core, embedded in an extremely diffuse common envelope (CE) typically of mass ~0.1 to 0.3 Msun. Our calculations follow the binary for many hundreds of orbits, ensuring that the orbital parameters we determine at the end of the calculations are close to final. Some of the fluid initially in the envelope of the (sub)giant, from 0.003 to 0.023 Msun in the cases we considered, is left bound to the NS. The eccentricities of the resulting binaries range from about 0.2 for our most grazing collision to about 0.9 for the nearly head-on cases. In almost all the cases we consider, gravitational radiation alone will cause sufficiently fast orbital decay to form a UCXB within a Hubble time, and often on a much shorter timescale. Our hydrodynamics code implements the recent SPH equations of motion derived with a variational approach by Springel & Hernquist and by Monaghan. Numerical noise is reduced by enforcing an analytic constraint equation that relates the smoothing lengths and densities of SPH particles. We present tests of these new methods to help demonstrate their improved accuracy.

J. C. Lombardi Jr.; Z. F. Proulx; K. L. Dooley; E. M. Theriault; N. Ivanova; F. A. Rasio

2005-09-17T23:59:59.000Z

330

Advanced binary geothermal power plants: Limits of performance  

SciTech Connect

The Heat Cycle Research Program is investigating potential improvements to power cycles utilizing moderate temperature geothermal resources to produce electrical power. Investigations have specifically examined Rankine cycle binary power systems. Binary Rankine cycles are more efficient than the flash steam cycles at moderate resource temperature, achieving a higher net brine effectiveness. At resource conditions similar to those at the Heber binary plant, it has been shown that mixtures of saturated hydrocarbons (alkanes) or halogenated hydrocarbons operating in a supercritical Rankine cycle gave improved performance over Rankine cycles with the pure working fluids executing single or dual boiling cycles or supercritical cycles. Recently, other types of cycles have been proposed for binary geothermal service. This report explores the feasible limits on efficiency of a plant given practical limits on equipment performance and discusses the methods used in these advanced concept plants to achieve the maximum possible efficiency. (Here feasible is intended to mean reasonably achievable and not cost-effective.) No direct economic analysis has been made because of the sensitivity of economic results to site specific input. The limit of performance of three advanced plants were considered in this report. The performance predictions were taken from the developers of each concept. The advanced plants considered appear to be approaching the feasible limit of performance. Ultimately, the plant designer must weigh the advantages and disadvantages of the the different cycles to find the best plant for a given service. In addition, this report presents a standard of comparison of the work which has been done in the Heat Cycle Research Program and in the industrial sector by Exergy, Inc. and Polythermal Technologies. 18 refs., 16 figs., 1 tab.

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

1991-01-01T23:59:59.000Z

331

Surface instability of binary compounds caused by sputter yield amplification  

Science Conference Proceedings (OSTI)

It is demonstrated that the flat surface of a binary material that is subjected to normal-incidence ion bombardment can be unstable even if the curvature dependence of the sputter yields is negligibly small. This unforeseen instability is brought about by sputter yield amplification, and it results in the formation of a disordered array of nanodots with the lighter of the two atomic species concentrated at the peaks of the dots.

Mark Bradley, R. [Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)

2012-06-01T23:59:59.000Z

332

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

333

A Search for Rapid Photometric Variability in Symbiotic Binaries  

E-Print Network (OSTI)

We report on our survey for rapid (time scale of minutes) photometric variability in symbiotic binaries. These binaries are becoming an increasingly important place to study accretion onto white dwarfs since they are candidate Type Ia supernovae progenitors. Unlike in most cataclysmic variables, the white dwarfs in symbiotics typically accrete from a wind, at rates greater than or equal to 10^{-9} solar masses per year. In order to elucidate the differences between symbiotics and other white dwarf accretors, as well as search for magnetism in symbiotic white dwarfs, we have studied 35 primarily northern symbiotic binaries via differential optical photometry. Our study is the most comprehensive to date of rapid variability in symbiotic binaries. We have found one magnetic accretor, Z And, previously reported by Sokoloski & Bildsten (1999). In four systems (EG And, BX Mon, CM Aql, and BF Cyg), some evidence for flickering at a low level (roughly 10 mmag) is seen for the first time. These detections are, however, marginal. For 25 systems, we place tight upper limits (order of mmag) on both aperiodic and periodic variability, highlighting a major difference between symbiotics and cataclysmic variables. The remaining five of the objects included in our sample (the 2 recurrent novae RS Oph and T CrB, plus CH Cyg, o Ceti, and MWC 560) had previous detections of large-amplitude optical flickering, and we present our extensive observations of these systems in a separate paper. We discuss the impact of our results on the ``standard'' picture of wind-fed accretion, and speculate on the possibility that in most symbiotics, light from quasi-steady nuclear burning on the surface of the white dwarf hides the fluctuating emission from accretion.

J. L. Sokoloski; Lars Bildsten; Wynn C. G. Ho

2001-04-02T23:59:59.000Z

334

FRAGILE BINARY CANDIDATES IN THE SDSS DR8 SPECTROSCOPIC ARCHIVE  

Science Conference Proceedings (OSTI)

We present a catalog of 80 very wide fragile binary candidates (projected separations >10,000 AU) from the Sloan Digital Sky Survey Data Release Eight spectral archive. The pairs were selected based on proper motion, radial velocity, metallicity, and photometric parallax criteria. The angular separations of these pairs range from 3'' to 250''. The peak in the metallicity distribution of these pairs is about -0.5 dex of solar metallicity. Space motions and reduced proper motion diagrams indicate that all these pairs are members of the disk. The chromospheric activity index S{sub HK} of each component in 38 binary candidates having spectra of high signal-to-noise ratio and member stars of three open clusters (NGC 2420, M67, and NGC 6791) were measured. The S{sub HK} versus color relation for these binary candidates is consistent with the trend seen in these open clusters. The ages implied by this relation suggest that fragile wide pairs can survive longer than 8 Gyr.

Zhao, J. K.; Oswalt, T. D. [Florida Institute of Technology, Melbourne, FL 32901 (United States); Zhao, G., E-mail: jzhao@fit.edu, E-mail: toswalt@fit.edu, E-mail: gzhao@bao.ac.cn [Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)

2012-02-15T23:59:59.000Z

335

ON THE FORMATION OF HOT JUPITERS IN STELLAR BINARIES  

Science Conference Proceedings (OSTI)

We study the production of hot Jupiters (HJs) in stellar binaries. We show that the 'eccentric Kozai-Lidov' (EKL) mechanism can play a key role in the dynamical evolution of a star-planet-star triple system. We run a large set of Monte Carlo simulations including the secular evolution of the orbits, general relativistic precession, and tides, and we determine the semimajor axis, eccentricity, inclination, and spin-orbit angle distributions of the HJs that are produced. We explore the effect of different tidal friction parameters on the results. We find that the efficiency of forming HJs when taking the EKL mechanism into account is higher then previously estimated. Accounting for the frequency of stellar binaries, we find that this production mechanism can account for about 30% of the observed HJ population. Current observations of spin-orbit angles are consistent with this mechanism producing {approx}30% of all HJs, and up to 100% of the misaligned systems. Based on the properties of binaries without an HJ in our simulations, we predict the existence of many Jupiter-like planets with moderately eccentric and inclined orbits and semimajor axes of several AU.

Naoz, Smadar [Harvard Smithsonian Center for Astrophysics, Institute for Theory and Computation, 60 Garden Street, Cambridge, MA 02138 (United States); Farr, Will M.; Rasio, Frederic A. [Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University, Evanston, IL 60208 (United States)

2012-08-01T23:59:59.000Z

336

SUSY QCD Corrections to Higgs Pair Production from Bottom Quark Fusion  

E-Print Network (OSTI)

We present a complete next-to-leading order (NLO) calculation for the total cross section for inclusive Higgs pair production via bottom-quark fusion at the CERN Large Hadron Collider (LHC) in the minimal supersymmetric standard model (MSSM) and the minimal supergravity model (mSUGRA). We emphasize the contributions of squark and gluino loops (SQCD) and the decoupling properties of our results for heavy squark and gluino masses. The enhanced couplings of the b quark to the Higgs bosons in supersymmetric models with large tanb yield large NLO SQCD corrections in some regions of parameter space.

Sally Dawson; Chung Kao; Yili Wang

2007-10-23T23:59:59.000Z

337

Model-oriented ocean tomography using higher frequency, bottom-mounted hydrophones  

Science Conference Proceedings (OSTI)

A tomographic scheme is presented that ingests ocean acoustic measurements into an ocean model using data from bottom-mounted hydrophones. The short distances between source-receiver pairs (110 km) means arrival times at frequencies of 811 kHz are readily detectable and often distinguishable. The influence of ocean surface motion causes considerable variability in acoustic travel times. Techniques are presented for measuring travel times and removing the variability due to surface waves. An assimilation technique is investigated that uses differences in measured and modeled acoustic travel times to impose corrections on the oceanographic model. Equations relating travel time differences to oceanographic variables are derived

James K. Lewis; Jason Rudzinsky; Subramaniam Rajan; Peter J. Stein; Amy Vandiver; The KauaiEx Group

2005-01-01T23:59:59.000Z

338

Sensitivity of a Barotropic Ocean Model to Perturbations of the Bottom Topography  

E-Print Network (OSTI)

In this paper, we look for an operator that describes the relationship between small errors in representation of the bottom topography in a barotropic ocean model and the model's solution. The study shows that the model's solution is very sensitive to topography perturbations in regions where the flow is turbulent. On the other hand, the flow exhibits low sensitivity in laminar regions. The quantitative measure of sensitivity is influenced essentially by the error growing time. At short time scales, the sensitivity exhibits the polynomial dependence on the error growing time. And in the long time limit, the dependence becomes exponential.

Eugene Kazantsev

2008-11-07T23:59:59.000Z

339

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

SciTech Connect

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

340

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

DOE Green Energy (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

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341

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

342

Search for gravitational waves from binary black hole inspirals in LIGO data  

E-Print Network (OSTI)

We report on a search for gravitational waves from binary black hole inspirals in the data from the second science run of the LIGO interferometers. The search focused on binary systems with component masses between 3 and 20 solar masses. Optimally oriented binaries with distances up to 1 Mpc could be detected with efficiency of at least 90%. We found no events that could be identified as gravitational waves in the 385.6 hours of data that we searched.

LIGO Scientific Collaboration; B. Abbott et. al

2005-09-30T23:59:59.000Z

343

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

DOE Green Energy (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

344

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

SciTech Connect

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

345

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

E-Print Network (OSTI)

fat binaries will greatly simplify the distribution and management of code in heterogeneous grid environments, but these benefits will be rendered

Shalf, John; Goodale, Tom

2004-01-01T23:59:59.000Z

346

Nonconformally flat initial data for binary compact objects  

SciTech Connect

A new method is described for constructing initial data for a binary neutron-star system in quasiequilibrium circular orbit. Two formulations for nonconformally flat data, waveless and near-zone helically symmetric, are introduced; in each formulation, the Einstein-Euler system, written in 3+1 form on an asymptotically flat spacelike hypersurface, is exactly solved for all metric components, including the spatially nonconformally flat potentials, and for irrotational flow. A numerical method applicable to both formulations is explained with an emphasis on the imposition of a spatial gauge condition. Results are shown for solution sequences of irrotational binary neutron-stars with matter approximated by parametrized equations of state that use a few segments of polytropic equations of state. The binding energy and total angular momentum of solution sequences computed within the conformally flat--Isenberg-Wilson-Mathews--formulation are closer to those of the third post-Newtonian (3PN) two point particles up to the closest orbits, for the more compact stars, whereas sequences resulting from the waveless/near-zone helically symmetric formulations deviate from the 3PN curve even more for the sequences with larger compactness. We think it likely that this correction reflects an overestimation in the Isenberg-Wilson-Mathews formulation as well as in the 3PN formula, by {approx}1 cycle in the gravitational-wave phase during the last several orbits. The work suggests that imposing spatial conformal flatness results in an underestimate of the quadrupole deformation of the components of binary neutron-star systems in the last few orbits prior to merger.

Uryu, Koji [Department of Physics, University of the Ryukyus, Senbaru, Nishihara, Okinawa 903-0213 (Japan); Limousin, Francois; Gourgoulhon, Eric [Laboratoire Univers et Theories, UMR 8102 du CNRS, Observatoire de Paris, Universite Paris Diderot, F-92190 Meudon (France); Friedman, John L. [Department of Physics, University of Wisconsin-Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201 (United States); Shibata, Masaru [Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan)

2009-12-15T23:59:59.000Z

347

Finding binary millisecond pulsars with the Hough transform  

E-Print Network (OSTI)

The Hough transformation has been used successfully for more than four decades. Originally used for tracking particle traces in bubble chamber images, this work shows a novel approach turning the initial idea into a powerful tool to incoherently detect millisecond pulsars in binary orbits. This poster presents the method used, a discussion on how to treat the time domain data from radio receivers and create the input "image" for the Hough transformation, details about the advantages and disadvantages of this approach, and finally some results from pulsars in 47 Tucanae.

C. Aulbert

2007-01-04T23:59:59.000Z

348

Plutonium microstructures. Part 2. Binary and ternary alloys  

Science Conference Proceedings (OSTI)

This report is the second of three parts that exhibit illustrations of inclusions in plutonium metal from inherent and tramp impurities, of intermetallic and nonmetallic constituents from alloy additions, and of the effects of thermal and mechanical treatments. This part includes illustrations of the microstructures in binary cast alloys and a few selected ternary alloys that result from measured additions of diluent elements, and of the microconstituents that are characteristic of phase fields in extended alloy systems. Microhardness data are given and the etchant used in the preparation of each sample is described.

Cramer, E.M.; Bergin, J.B.

1983-12-01T23:59:59.000Z

349

ABSOLUTE PROPERTIES OF THE ECCENTRIC ECLIPSING BINARY STAR FT ORIONIS  

SciTech Connect

Accurate absolute properties are determined for the first time for the 3.15 day period eccentric eclipsing binary star FT Ori based on new absolute photometry, five differential light curves, and a radial velocity curve. The stars appear to be normal for their spectral types, A0 + A2. The orbit is highly eccentric (e = 0.409) and shows apsidal motion with a period of 536 years. The absolute properties and the degree of central mass concentration of the stars are consistent with current theoretical models at an age of 190 Myr.

Sabby, Jeffrey A. [Physics Department, Southern Illinois University Edwardsville, Edwardsville, IL 62025 (United States); Lacy, Claud H. Sandberg [Physics Department, University of Arkansas, Fayetteville, AR 72701 (United States); Ibanoglu, Cafer [Astronomy and Space Sciences Department, Science Faculty, Ege University, 35100 Boronova, Izmir (Turkey); Claret, Antonio, E-mail: jsabby@siue.edu, E-mail: clacy@uark.edu, E-mail: cafer.ibanoglu@ege.edu.tr, E-mail: claret@iaa.es [Instituto de Astrofisica de Andalucia, CSIC, Apdo. Postal 3004, E-18080 Granada (Spain)

2011-06-15T23:59:59.000Z

350

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. ...

351

Evaluation of severe accident risks, Peach Bottom, Unit 2: Main report  

Science Conference Proceedings (OSTI)

In support of the Nuclear Regulatory Commission's (NRC's) assessment of the risk from severe accidents at commercial nuclear power plants in the US reported NUREG-1150, the Severe Accident Risk Reduction Program (SARRP) has completed a revised calculation of the risk to the general public from severe accidents at the Peach Bottom Atomic Power Station, Unit 2. This power plant, located in southeastern Pennsylvania, is operated by the Philadelphia Electric Company. The emphasis in this risk analysis was not on determining a so-called'' point estimate of risk. Rather, it was to determine the distribution of risk, and to discover the uncertainties that account for the breadth of this distribution. Off-site risk initiated by events both internal and external to the power station were assessed. 39 refs., 174 figs., 133 tabs.

Payne, A.C.; Breeding, R.J.; Jow, H.N.; Shiver, A.W. (Sandia National Labs., Albuquerque, NM (USA)); Helton, J.C. (Arizona State Univ., Tempe, AZ (USA)); Smith, L.N. (Science Applications International Corp., Albuquerque, NM (USA))

1990-12-01T23:59:59.000Z

352

Severe accident source term characteristics for selected Peach Bottom sequences predicted by the MELCOR Code  

SciTech Connect

The purpose of this report is to compare in-containment source terms developed for NUREG-1159, which used the Source Term Code Package (STCP), with those generated by MELCOR to identify significant differences. For this comparison, two short-term depressurized station blackout sequences (with a dry cavity and with a flooded cavity) and a Loss-of-Coolant Accident (LOCA) concurrent with complete loss of the Emergency Core Cooling System (ECCS) were analyzed for the Peach Bottom Atomic Power Station (a BWR-4 with a Mark I containment). The results indicate that for the sequences analyzed, the two codes predict similar total in-containment release fractions for each of the element groups. However, the MELCOR/CORBH Package predicts significantly longer times for vessel failure and reduced energy of the released material for the station blackout sequences (when compared to the STCP results). MELCOR also calculated smaller releases into the environment than STCP for the station blackout sequences.

Carbajo, J.J. [Oak Ridge National Lab., TN (United States)

1993-09-01T23:59:59.000Z

353

Bottom-up derivation of an effective thermostat for united atoms simulations of water  

E-Print Network (OSTI)

In this article we derive the effective pairwise interactions in a Langevin type united atoms model of water. The interactions are determined from the trajectories of a detailed molecular dynamics simulation of simple point charge water. A standard method is used for estimating the conservative interaction, whereas a new "bottom-up" method is used to determine the effective dissipative and stochastic interactions. We demonstrate that, when compared to the standard united atoms model, the transport properties of the coarse-grained model is significantly improved by the introduction of the derived dissipative and stochastic interactions. The results are compared to a previous study, where a "top-down" approach was used to obtain transport properties consistent with those of the simple point charge water model.

Eriksson, Anders; Nystrom, Johan; Tunstrom, Kolbjorn

2009-01-01T23:59:59.000Z

354

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

SciTech Connect

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

355

A top-injection bottom-production cyclic steam stimulation method for enhanced heavy oil recovery  

E-Print Network (OSTI)

A novel method to enhance oil production during cyclic steam injection has been developed. In the Top-Injection and Bottom-Production (TINBOP) method, the well contains two strings separated by two packers (a dual and a single packer): the short string (SS) is completed in the top quarter of the reservoir, while the long string (LS) is completed in the bottom quarter of the reservoir. The method requires an initial warm-up stage where steam is injected into both strings for 21 days; then the LS is opened to production while the SS continues to inject steam for 14 days. After the initial warm-up, the following schedule is repeated: the LS is closed and steam is injected in the SS for 21 days; then steam injection is stopped and the LS is opened to production for 180 days. There is no soak period. Simulations to compare the performance of the TINBOP method against that of a conventional cyclic steam injector (perforated across the whole reservoir) have been made. Three reservoir types were simulated using 2-D radial, black oil models: Hamaca (9?°API), San Ardo (12?°API) and the SPE fourth comparative solution project (14?°API). For the first two types, a 20x1x20 10-acre model was used that incorporated typical rock and fluid properties for these fields. Simulation results indicate oil recovery after 10 years was 5.7-27% OIIP with TINBOP, that is 57-93% higher than conventional cyclic steam injection (3.3-14% OIIP). Steam-oil ratios were also decreased with TINBOP (0.8-3.1%) compared to conventional (1.2-5.3%), resulting from the improved reservoir heating efficiency.

Matus, Eric Robert

2006-08-01T23:59:59.000Z

356

Formation of Kuiper-belt binaries through multiple chaotic scattering encounters with low-mass intruders  

E-Print Network (OSTI)

The discovery that many trans-neptunian objects exist in pairs, or binaries, is proving invaluable for shedding light on the formation, evolution and structure of the outer Solar system. Based on recent systematic searches it has been estimated that up to 10% of Kuiper-belt objects might be binaries. However, all examples discovered to-date are unusual, as compared to near-Earth and main-belt asteroid binaries, for their mass ratios of order unity and their large, eccentric orbits. In this article we propose a common dynamical origin for these compositional and orbital properties based on four-body simulations in the Hill approximation. Our calculations suggest that binaries are produced through the following chain of events: initially, long-lived quasi-bound binaries form by two bodies getting entangled in thin layers of dynamical chaos produced by solar tides within the Hill sphere. Next, energy transfer through gravitational scattering with a low-mass intruder nudges the binary into a nearby non-chaotic, stable zone of phase space. Finally, the binary hardens (loses energy) through a series of relatively gentle gravitational scattering encounters with further intruders. This produces binary orbits that are well fitted by Kepler ellipses. Dynamically, the overall process is strongly favored if the original quasi-bound binary contains comparable masses. We propose a simplified model of chaotic scattering to explain these results. Our findings suggest that the observed preference for roughly equal mass ratio binaries is probably a real effect; that is, it is not primarily due to an observational bias for widely separated, comparably bright objects. Nevertheless, we predict that a sizeable population of very unequal mass Kuiper-belt binaries is likely awaiting discovery.

Sergey A. Astakhov; Ernestine A. Lee; David Farrelly

2005-04-04T23:59:59.000Z

357

Primary coolant chemistry of the Peach Bottom and Fort St. Vrain high-temperature gas-cooled reactors  

Science Conference Proceedings (OSTI)

The chemical impurities in the primary coolants of the Peach Bottom and Fort St. Vrain reactors are discussed. The impurity mixtures in the two plants were quite different because the sources of the impurities were different. In the Peach Bottom reactor, the impurities were dominated by H/sub 2/ and CH/sub 4/, which are decomposition products of oil. In the Fort St. Vrain reactor, there were high levels of CO, CO/sub 2/, and H/sub 2/O. Although oil ingress at Peach Bottom created carbon deposits on virtually all surfaces, its effect on reactor operation was negligible. Slow outgassing of water from the thermal insulation at Fort St. Vrain caused delays in reactor startup. The overall graphite oxidation in both plants was negligible.

Burnette, R.D.; Baldwin, N.L.

1980-11-01T23:59:59.000Z

358

KEPLER STUDIES OF LOW-MASS ECLIPSING BINARIES. I. PARAMETERS OF THE LONG-PERIOD BINARY KIC 6131659  

SciTech Connect

KIC 6131659 is a long-period (17.5 days) eclipsing binary discovered by the Kepler mission. We analyzed six quarters of Kepler data along with supporting ground-based photometric and spectroscopic data to obtain accurate values for the mass and radius of both stars, namely, M{sub 1} = 0.922 {+-} 0.007 M{sub Sun }, R{sub 1} = 0.8800 {+-} 0.0028 R{sub Sun }, and M{sub 2} = 0.685 {+-} 0.005 M{sub Sun }, R{sub 2} = 0.6395 {+-} 0.0061 R{sub Sun }. There is a well-known issue with low-mass (M {approx}< 0.8 M{sub Sun }) stars (in cases where the mass and radius measurement uncertainties are smaller than 2% or 3%) where the measured radii are almost always 5% to 15% larger than expected from evolutionary models, i.e., the measured radii are all above the model isochrones in a mass-radius plane. In contrast, the two stars in KIC 6131659 were found to sit on the same theoretical isochrone in the mass-radius plane. Until recently, all of the well-studied eclipsing binaries with low-mass stars had periods of less than about three days. The stars in such systems may have been inflated by high levels of stellar activity induced by tidal effects in these close binaries. KIC 6131659 shows essentially no evidence of enhanced stellar activity, and our measurements support the hypothesis that the unusual mass-radius relationship observed in most low-mass stars is influenced by strong magnetic activity created by the rapid rotation of the stars in tidally locked, short-period systems. Finally, using short cadence data, we show that KIC 6131657 has one of the smallest measured non-zero eccentricities of a binary with two main-sequence stars, where ecos {omega} (4.57 {+-} 0.02) Multiplication-Sign 10{sup -5}.

Bass, Gideon; Orosz, Jerome A.; Welsh, William F.; Windmiller, Gur; Gregg, Trevor Ames; Fetherolf, Tara [Department of Astronomy, San Diego State University, 5500 Campanile Dr., San Diego, CA 92182 (United States); Wade, Richard A. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Quinn, Samuel N. [Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, GA 30302 (United States)

2012-12-20T23:59:59.000Z

359

Formation and destruction of jets in X-ray binaries  

E-Print Network (OSTI)

Neutron-star and black-hole X-ray binaries (XRBs) exhibit radio jets, whose properties depend on the X-ray spectral state and history of the source. In particular, black-hole XRBs emit compact, steady radio jets when they are in the so-called hard state, the jets become eruptive as the sources move toward the soft state, disappear in the soft state, and re-appear when the sources return to the hard state. On the other hand, jets from neutron-star X-ray binaries are typically weaker radio emitters than the black-hole ones at the same X-ray luminosity and in some cases radio emission is detected in the soft state. Significant phenomenology has been accumulated so far regarding the spectral states of neutron-star and black-hole XRBs, and there is general agreement about the type of the accretion disk around the compact object in the various spectral states. Our aim is to investigate whether the phenomenology regarding the X-ray emission on one hand and the jet appearance and disappearance on the other can be put...

Kylafis, N D; Kazanas, D; Christodoulou, D M

2011-01-01T23:59:59.000Z

360

Numerical Relativity meets Data Analysis: Spinning Binary Black Hole Case  

E-Print Network (OSTI)

We present a study of the gravitational waveforms from a series of spinning, equal-mass black hole binaries focusing on the harmonic content of the waves and the contribution of the individual harmonics to the signal-to-noise ratio. The gravitational waves were produced from two series of evolutions with black holes of initial spins equal in magnitude and anti-aligned with each other. In one series the magnitude of the spin is varied; while in the second, the initial angle between the black-hole spins and the orbital angular momentum varies. We also conduct a preliminary investigation into using these waveforms as templates for detecting spinning binary black holes. Since these runs are relativity short, containing about two to three orbits, merger and ringdown, we limit our study to systems of total mass greater than 50 solar masses. This choice ensures that our waveforms are present in the ground-based detector band without needing addition gravitational wave cycles. We find that while the mode contribution to the signal-to-noise ratio varies with the initial angle, the total mass of the system caused greater variations in the match.

Deirdre Shoemaker; Birjoo Vaishnav; Ian Hinder; Frank Herrmann

2008-02-29T23:59:59.000Z

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

The Orientation of the Eta Carinae Binary System  

E-Print Network (OSTI)

We examine a variety of observations that shed light on the orientation of the semi-major axis of the Eta Carinae massive binary system. Under several assumptions we study the following observations: The Doppler shifts of some He I P-Cygni lines that is attributed to the secondary's wind, of one Fe II line that is attributed to the primary's wind, and of the Paschen emission lines which are attributed to the shocked primary's wind, are computed in our model and compared with observations. We compute the hydrogen column density toward the binary system in our model, and find a good agreement with that deduced from X-ray observations. We calculate the ionization of surrounding gas blobs by the radiation of the hotter secondary star, and compare with observations of a highly excited [Ar III] narrow line. We find that all of these support an orientation where for most of the time the secondary - the hotter less massive star - is behind the primary star. The secondary comes closer to the observer only for a short time near periastron passage, in its highly eccentric (e~0.9) orbit. Further supporting arguments are also listed, followed by discussion of some open and complicated issues.

Amit Kashi; Noam Soker

2008-06-26T23:59:59.000Z

362

Interruption of Tidal Disruption Flares By Supermassive Black Hole Binaries  

E-Print Network (OSTI)

Supermassive black hole binaries (SMBHBs) are products of galaxy mergers, and are important in testing Lambda cold dark matter cosmology and locating gravitational-wave-radiation sources. A unique electromagnetic signature of SMBHBs in galactic nuclei is essential in identifying the binaries in observations from the IR band through optical to X-ray. Recently, the flares in optical, UV, and X-ray caused by supermassive black holes (SMBHs) tidally disrupting nearby stars have been successfully used to observationally probe single SMBHs in normal galaxies. In this Letter, we investigate the accretion of the gaseous debris of a tidally disrupted star by a SMBHB. Using both stability analysis of three-body systems and numerical scattering experiments, we show that the accretion of stellar debris gas, which initially decays with time $\\propto t^{-5/3}$, would stop at a time $T_{\\rm tr} \\simeq \\eta T_{\\rm b}$. Here, $\\eta \\sim0.25$ and $T_{\\rm b}$ is the orbital period of the SMBHB. After a period of interruption, the accretion recurs discretely at time $T_{\\rm r} \\simeq \\xi T_b$, where $\\xi \\sim 1$. Both $\\eta$ and $\\xi$ sensitively depend on the orbital parameters of the tidally disrupted star at the tidal radius and the orbit eccentricity of SMBHB. The interrupted accretion of the stellar debris gas gives rise to an interrupted tidal flare, which could be used to identify SMBHBs in non-active galaxies in the upcoming transient surveys.

F. K. Liu; S. Li; Xian Chen

2009-10-21T23:59:59.000Z

363

Spin Flips and Precession in Black-Hole-Binary Mergers  

E-Print Network (OSTI)

We use the `moving puncture' approach to perform fully non-linear evolutions of spinning quasi-circular black-hole binaries with individual spins not aligned with the orbital angular momentum. We evolve configurations with the individual spins (parallel and equal in magnitude) pointing in the orbital plane and 45-degrees above the orbital plane. We introduce a technique to measure the spin direction and track the precession of the spin during the merger, as well as measure the spin flip in the remnant horizon. The former configuration completes 1.75 orbits before merging, with the spin precessing by 98-degrees and the final remnant horizon spin flipped by ~72-degrees with respect to the component spins. The latter configuration completes 2.25 orbits, with the spins precessing by 151-degrees and the final remnant horizon spin flipped ~34-degrees with respect to the component spins. These simulations show for the first time how the spins are reoriented during the final stage of binary black hole mergers verifying the hypothesis of the spin-flip phenomenon. We also compute the track of the holes before merger and observe a precession of the orbital plane with frequency similar to the orbital frequency and amplitude increasing with time.

Manuela Campanelli; Carlos O. Lousto; Yosef Zlochower; Badri Krishnan; David Merritt

2006-12-13T23:59:59.000Z

364

Pairing Functions, Boolean Evaluation and Binary Decision Diagrams  

E-Print Network (OSTI)

A ``pairing function'' J associates a unique natural number z to any two natural numbers x,y such that for two ``unpairing functions'' K and L, the equalities K(J(x,y))=x, L(J(x,y))=y and J(K(z),L(z))=z hold. Using pairing functions on natural number representations of truth tables, we derive an encoding for Binary Decision Diagrams with the unique property that its boolean evaluation faithfully mimics its structural conversion to a a natural number through recursive application of a matching pairing function. We then use this result to derive {\\em ranking} and {\\em unranking} functions for BDDs and reduced BDDs. The paper is organized as a self-contained literate Prolog program, available at \\url{http://logic.csci.unt.edu/tarau/research/2008/pBDD.zip}. {\\em Keywords:} logic programming and computational mathematics, pairing/unpairing functions, encodings of boolean functions, binary decision diagrams, natural number representations of truth tables

Tarau, Paul

2008-01-01T23:59:59.000Z

365

FORMATION OF STABLE MAGNETARS FROM BINARY NEUTRON STAR MERGERS  

Science Conference Proceedings (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

366

Hadron Physics at the Charm and Bottom Thresholds and Other Novel QCD Physics Topics at the NICA Accelerator Facility  

Science Conference Proceedings (OSTI)

The NICA collider project at the Joint Institute for Nuclear Research in Dubna will have the capability of colliding protons, polarized deuterons, and nuclei at an effective nucleon-nucleon center-of mass energy in the range {radical}s{sub NN} = 4 to 11 GeV. I briefly survey a number of novel hadron physics processes which can be investigated at the NICA collider. The topics include the formation of exotic heavy quark resonances near the charm and bottom thresholds, intrinsic strangeness, charm, and bottom phenomena, hidden-color degrees of freedom in nuclei, color transparency, single-spin asymmetries, the RHIC baryon anomaly, and non-universal antishadowing.

Brodsky, Stanley J.; /SLAC

2012-06-20T23:59:59.000Z

367

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

E-Print Network (OSTI)

Considered here are Boussinesq systems of equations of surface water wave theory over a variable bottom. A simplified such Boussinesq system is derived and solved numerically by the standard Galerkin-finite element method. We study by numerical means the generation of tsunami waves due to bottom deformation and we compare the results with analytical solutions of the linearized Euler equations. Moreover, we study tsunami wave propagation in the case of the Java 2006 event, comparing the results of the Boussinesq model with those produced by the finite difference code MOST, that solves the shallow water wave equations.

Mitsotakis, Dimitrios

2009-01-01T23:59:59.000Z

368

Stripes ordering in self-stratification experiments of binary and ternary granular mixtures  

E-Print Network (OSTI)

The self-stratification of binary and ternary granular mixtures has been experimentally investigated. Ternary mixtures lead to a particular ordering of the strates which was not accounted for in former explanations. Bouncing grains are found to have an important effect on strate formation. A complementary mechanism for self-stratification of binary and ternary granular mixtures is proposed.

N. Lecocq; N. Vandewalle

2000-04-25T23:59:59.000Z

369

Coordinated controller tuning of a boiler turbine unit with new binary particle swarm optimization algorithm  

Science Conference Proceedings (OSTI)

Coordinated controller tuning of the boiler turbine unit is a challenging task due to the nonlinear and coupling characteristics of the system. In this paper, a new variant of binary particle swarm optimization (PSO) algorithm, called probability based ... Keywords: Coordinated control, boiler turbine unit, controller tuning, particle swarm optimization (PSO), probability based binary particle swarm optimization (PBPSO)

Muhammad Ilyas Menhas; Ling Wang; Min-Rui Fei; Cheng-Xi Ma

2011-05-01T23:59:59.000Z

370

Heber Binary-Cycle Geothermal Demonstration Power Plant, Half-Load Testing, Performance, and Thermodynamics  

Science Conference Proceedings (OSTI)

In its second year of operation, the Heber binary-cycle geothermal demonstration plant met design expectations for part-load operation. The plant, located in Heber, California, also demonstrated the environmental acceptability and design thermodynamic performance capabilities of the binary-cycle process.

1988-08-01T23:59:59.000Z

371

WIND TOMOGRAPHY IN BINARY SYSTEMS O.Knill, R.Dgani and M.Vogel  

E-Print Network (OSTI)

WIND TOMOGRAPHY IN BINARY SYSTEMS O.Knill, R.Dgani and M.Vogel ETH-Zurich, CH-8092, Switzerland method is particularly suitable for determining the velocity laws of stellar winds. 1. WIND TOMOGRAPHY AND ABEL'S INTEGRAL Binary systems in which a compact, point-like radiation source shines through the wind

Knill, Oliver

372

Target tracking with binary proximity sensors: fundamental limits, minimal descriptions, and algorithms  

Science Conference Proceedings (OSTI)

We explore fundamental performance limits of tracking a target in a two-dimensional field of binary proximity sensors, and design algorithms that attain those limits. In particular, using geometric and probabilistic analysis of an idealized model, we ... Keywords: binary sensing, distributed algorithms, fundamental limits, sensor networks, target tracking

N. Shrivastava; R. Mudumbai U. Madhow; S. Suri

2006-10-01T23:59:59.000Z

373

Hardware/Software Partitioning of Software Binaries: A Case Study of H.264 Decode  

E-Print Network (OSTI)

Hardware/Software Partitioning of Software Binaries: A Case Study of H.264 Decode Greg Stitt whether new techniques for hardware/software partitioning of an application's binary are competitive-return, function specialization, algorithmic specialization, hardware-targeted reimplementation, global array

Vahid, Frank

374

A dual binary image watermarking based on wavelet domain and pixel distribution features  

Science Conference Proceedings (OSTI)

Considering that the binary images are featured little capability in data hiding, difficulty in watermarking embedding and two values, in order to improve the robustness and invisibility of watermarkings embedded into the binary images, a novel algorithm ... Keywords: DWT, pixel distribution features, virtual watermarking, watermarking restoration

Wei Xia; Hongwei Lu; Yizhu Zhao

2010-01-01T23:59:59.000Z

375

An Integrated Sequence Construction of Binary Zero-Correlation Zone Sequences  

Science Conference Proceedings (OSTI)

The present paper introduces an integrated construction of binary sequences having a zero-correlation zone. The cross-correlation function and the side-lobe of the auto-correlation function of the proposed sequence set is zero for the phase shifts within ... Keywords: Hadamard matrix, binary sequence, mutually orthogonal complementary sets, sequence design, zero-correlation zone

Takafumi Hayashi

2007-10-01T23:59:59.000Z

376

On application of multi-rooted binary decision diagrams to probabilistic model checking  

Science Conference Proceedings (OSTI)

In this paper we consider the applicability of multi-rooted binary decision diagrams for the probabilistic model checking. The symbolic probabilistic model checking involves manipulation of functions and matrices with the values in [0,1], and multi-terminal ... Keywords: binary decision diagrams, probabilistic model checking

Dmitry Bugaychenko

2012-01-01T23:59:59.000Z

377

New fast binary pyramid motion estimation for MPEG2 and HDTV encoding  

Science Conference Proceedings (OSTI)

A novel fast binary pyramid motion estimation (FBPME) algorithm is presented in this paper. The proposed FBPME scheme is based on binary multiresolution layers, exclusive-or (XOR) Boolean block matching, and a N-scale tiling search scheme. Each video ...

Xudong Song; Tihao Chiang; Xiaobing Lee; Ya-Qin Zhang

2000-10-01T23:59:59.000Z

378

A wavelet-tree-based watermarking method using distance vector of binary cluster  

Science Conference Proceedings (OSTI)

This paper proposes a wavelet-tree-based watermarking method using distance vector of binary cluster for copyright protection. In the proposed method, wavelet trees are classified into two clusters using the distance vector to denote binary watermark ... Keywords: Blind watermarking method, Copyright protection, Distance vector, Significant coefficient, Watermark, Wavelet tree

Wei-Hung Lin; Yuh-Rau Wang; Shi-Jinn Horng

2009-08-01T23:59:59.000Z

379

Calibration of Modulation Transfer Function of Surface Profilometers with 1D and 2D Binary Pseudo-random Array Standards  

E-Print Network (OSTI)

Pseudo-random Grating Standard for Calibration of SurfaceBinary Pseudorandom Grating as a Standard Test Surface for2D Binary Pseudo-random Array Standards Valeriy V. Yashchuk,

Yashchuk, Valeriy V.

2009-01-01T23:59:59.000Z

380

Binary Homogeneous Nucleation: Temperature and Relative Humidity Fluctuations, Nonlinearity, and Aspects of New Particle Production in the Atmosphere  

Science Conference Proceedings (OSTI)

Binary homogeneous nucleation of sulfuric acid and water vapor is thought to be the primary source of new particles in the marine atmosphere. The rate of binary homogeneous nucleation depends strongly on temperature and the gas-phase ...

Richard C. Easter; Leonard K. Peters

1994-07-01T23:59:59.000Z

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

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

382

ANALYSIS OF 2H-EVAPORATOR SCALE POT BOTTOM SAMPLE [HTF-13-11-28H  

SciTech Connect

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 2Hevaporator 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 2Hevaporator 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.

2013-07-15T23:59:59.000Z

383

Leaching and standing water characteristics of bottom ash and composted manure blends  

E-Print Network (OSTI)

Coal burning electrical generating facilities produce roughly 91 million metric tons of ash byproducts annually. Typically, this ash is retained at the power plant sites, adding to the cost of managing wastes at the plants. Another waste material requiring significant management efforts and costs is manure. Repeated application of manure on small parcels of land can contribute to environmental problems such as impaired water quality due to nitrate (NO?) leaching into the groundwater and phosphorus (P) runoff into surface water bodies. Alternative uses of bottom ash (BA) and composted manure (CM) such as a soil amendment for landscapes or potting media need to be explored. Before an alternative is adopted at a large scale, however, it must be evaluated for its effectiveness and environmental integrity. Two column studies were conducted to evaluate three blends of acidic and alkaline BA and CM, namely B1 (95:5%), B2 (90:10%), and B3 (80:20%). Samples from standing water (top) and leachate (bottom) were collected at weekly intervals to evaluate the effects of different blend ratios and time on chemical and physical properties. It was found that higher CM content in acidic and alkaline raw blends (no-de-ionized water added) resulted in significantly higher concentrations of total Kjeldahl nitrogen (TKN), P, and potassium (K). Generally, a higher CM content in acidic and alkaline blends resulted in higher leachate concentrations for total solids (TS), total dissolved solids (TDS), total volatile solids (TVS), total suspended solids (TSS), chemical oxygen demand (COD), TKN, NO?-N, ammonium (NH?-N), P, and K. Concentrations of nearly all chemicals were lower in standing water (top) compared to leachate (bottom) for acidic and alkaline blends. Alkaline blends had higher leachate and standing water TKN, NH?-N, N0?-N, P, and K compared to the acidic blends. After day 28, standing water TDS concentrations for all acidic blends were below the USEPA drinking water standard for TDS. Standing water for alkaline blends remained below the USEPA drinking water standard for TDS for the entire duration of the study. Leachate and standing water concentrations for all blends were below the USEPA drinking water standard for NO?-N for acidic blends. Standing water and leachate for alkaline blends B1 and B2 were below the USEPA drinking water standard for NO?-N while standing water was well below the standard for the entire duration of the study. P concentrations were low in leachate and nonexistent in standing water for both acidic and alkaline blends. Based on these findings, it is concluded that acidic and alkaline B1 (95:5%) and B2 (90:10%) may be considered as a soil amendment substitute.

Mathis, James Gregory

2001-01-01T23:59:59.000Z

384

Materials Reliability Program: Inspection and Evaluation Guidelines for Reactor Vessel Bottom-Mounted Nozzles in U.S. PWR Plants (MR P-206)  

Science Conference Proceedings (OSTI)

This report presents inspection and evaluation guidelines for reactor vessel bottom-mounted nozzles in U.S. pressurized water reactor (PWR) plants.

2009-03-23T23:59:59.000Z

385

Validation of the COMET Bottom-Flooding Core-Catcher with Prototypic Corium  

SciTech Connect

The COMET concept is developed to cool an ex-vessel corium melt, in case of a hypothetical severe accident leading to vessel melt-through, by passive injection of coolant water to the bottom of the melt. An advanced version of this concept (CometPCA) uses a porous concrete layer from which the water is supplied to the melt predominantly through a group of porous channels. The concept was designed to be largely independent of different accident scenarios. It could be applied to both current and future reactors. FZK has successfully performed in Germany a series of large-scale experiments with simulant corium melts. An important step in validating the concept is the use of a reactor typical oxide melt (UO{sub 2} + ZrO{sub 2} + molten concrete). A unit cell of the cooling device was used in the VULCANO facility in a 20 cm diameter, 60 cm high crucible with about 40 kg corium melt. The melt has been generated and poured from the VULCANO plasma arc furnace into the COMET cooling device at an initial temperature above 2000 K. It was internally heated by sustained induction power (varying between 10 and 30 kW) until complete cooling was achieved. The initial condition for onset of passive flooding was established about 1 minute after the pouring, when the top layer of sacrificial concrete was eroded and the passive water injection started. The next important process originating from fast evaporation of the injected coolant water, was the inherent transfer of the corium melt into a permeable porous oxide melt layer allowing a permanent intimate contact of the solidifying melt with the steam/water flow from below. About 17 kg of water was vaporized and subsequently condensed during the course of the experiment, while water supply from the bottom continued, flooded and eventually covered the porously solidified corium melt. The melt was safely arrested, solidified and quenched within a period of less than 20 minutes without any energetic event, as expected from previous experiments with simulant melts. Post-test analysis has started to characterize the porosity of the solidified melt and to provide further useful insights. (authors)

Journeau, Christophe [CEA Cadarache, Severe Accident Mastering experimental Laboratory (DEN/DTN/STRI/LMA), 13108 St Paul lez Durance (France); Alsmeyer, Hans [Forschungszentrum Karlsruhe, IKET, Karlsruhe (Germany)

2006-07-01T23:59:59.000Z

386

Experimental studies of unrestrained cylinders on an impermeable bottom under currents  

E-Print Network (OSTI)

Experimental studies were conducted to measure the motion of unrestrained cylinders with different diameters (0.048 m-0. 1 15 m), specific gravities (1.57-3.17) and aspect ratios (3.56-8.67), rolling on an impermeable, flat bottom under currents of velocities ranging from 0.3 m/s to 1.0 m/s. The currents in the flume of a uniform cross section (0.47 m x 0.52 m) were steady and uniform in velocity except near the bottom and the side walls. A video processing method was developed to document the linear and angular positions of the cylinders as a function of time. The experimental error encountered due to video resolution was studied and minimized through the use of a proper data sampling rate The terminal velocities of the cylinders are found to increase with an increase in current velocity. When the current velocity is above a superthreshold current velocity, the ratio of the terminal velocity to the current velocity (relative terminal velocity) seems to be around 0.70. The relative terminal velocities of the cylinders are found to be independent of diameter, aspect ratio and blockage ratio when the current velocity is greater than the superthreshold velocity. When the current velocity is greater than the superthreshold velocity, the relative terminal velocities of the cylinders are almost independent of specific gravity. The measurements show that the relative terminal velocities of cylinders with small specific gravities (1.57-1.71) range from 0.70-0.72, slightly above 0.70, while those of cylinders with large specific gravities (2.77-3.17) range from 0.64-0.66, slightly below 0.70. However, the threshold and superthreshold velocities are smaller for a cylinder with smaller specific gravity. Analysis of angular and linear motion of the cylinders shows that the cylinders do not roll with pure rotation. Both steel and PVC cylinders experience back-slipping, where average angular velocity multiplied by the radius of the cylinder is greater than average linear center velocity in the x-direction.

Fenical, Scott William

1996-01-01T23:59:59.000Z

387

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

Science Conference Proceedings (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

388

Assimilation of Radiocarbon and Chlorofluorocarbon Data to Constrain Deep and Bottom Water Transports in the World Ocean  

Science Conference Proceedings (OSTI)

A coarse-resolution global model with time-invariant circulation is fitted to hydrographic and tracer data by means of the adjoint method. Radiocarbon and chlorofluorocarbon (CFC-11 and CFC-12) data are included to constrain deep and bottom water ...

Reiner Schlitzer

2007-02-01T23:59:59.000Z

389

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

390

Why Western Boundary Currents in Realistic Oceans are Inviscid: A Link between Form Stress and Bottom Pressure Torques  

Science Conference Proceedings (OSTI)

It is shown that wind stress curl is balanced by bottom pressure torque in a zonal integral over any strip wide enough to smooth out the effect of nonlinear terms (typically about 3 of latitude). The derivation is completely general as long as ...

Chris W. Hughes; Beverly A. de Cuevas

2001-10-01T23:59:59.000Z

391

Comparing the Nano-Resolution Depth Sensor to the Co-located Ocean Bottom Seismometer at MARS  

E-Print Network (OSTI)

Data from earthquake measurements using a Nano-Resolution Pressure Sensor and a co-located Ocean Bottom Seismometer have been compared and analyzed. It is shown that the Nano-Resolution Pressure Sensor can serve as a vertical OBS. Moreover, using the pressure sensor in conjunction with a seismometer helps to separate the ocean and seismic signals.

Tolkova, Elena

2014-01-01T23:59:59.000Z

392

ABSOLUTE PROPERTIES OF THE ECLIPSING BINARY STAR V335 SERPENTIS  

SciTech Connect

V335 Ser is now known to be an eccentric double-lined A1+A3 binary star with fairly deep (0.5 mag) partial eclipses. Previous studies of the system are improved with 7456 differential photometric observations from the URSA WebScope and 5666 from the NFO WebScope, and 67 high-resolution spectroscopic observations from the Tennessee State University 2 m automatic spectroscopic telescope. From dates of minima, the apsidal period is about 880 years. Accurate (better than 2%) masses and radii are determined from analysis of the two new light curves and the radial velocity curve. Theoretical models match the absolute properties of the stars at an age of about 380 Myr, though the age agreement for the two components is poor. Tidal theory correctly confirms that the orbit should still be eccentric, but we find that standard tidal theory is unable to match the observed asynchronous rotation rates of the components' surface layers.

Lacy, Claud H. Sandberg [Physics Department, University of Arkansas, Fayetteville, AR 72701 (United States); Fekel, Francis C. [Center of Excellence in Information Systems, Tennessee State University, Nashville, TN 37209 (United States); Claret, Antonio, E-mail: clacy@uark.edu, E-mail: fekel@evans.tsuniv.edu, E-mail: claret@iaa.es [Instituto de Astrofisica de Andalucia, CSIC, Apdo. Postal 3004, E-18080 Granada (Spain)

2012-08-15T23:59:59.000Z

393

Chemical phase separation in binary iron-chromium alloys  

Science Conference Proceedings (OSTI)

A study of chromium-enriched domain growth occurring binary Fe-Cr alloys quenched from above to various temperatures within the miscibility gap has been made. We present kinetic sequences of in- situ small angle neutron scattering (SANS) data for aging times up to 75 hours on alloys containing 20, 30, and 40 atomic percent chromium. The SANS measurements are compared with partial structure functions obtained from computer simulations performed on a distributed array processor (DAP). We use a pair-potential lattice model, but simulate large systems containing up to 16 million lattice sites. We find good agreement between the scaled structure factors for our SANS data and computer simulated system. 12 refs., 4 figs.

Hawick, K.A. (Edinburgh Univ. (UK). Dept. of Physics); Epperson, J.E. (Argonne National Lab., IL (USA)); Windsor, C.G.; Rainey, V.S. (AEA Technology, London (UK))

1990-12-01T23:59:59.000Z

394

Finite-Difference Lattice Boltzmann Methods for binary fluids  

E-Print Network (OSTI)

We investigate two-fluid BGK kinetic methods for binary fluids. The developed theory works for asymmetric as well as symmetric systems. For symmetric systems it recovers Sirovich's theory and is summarized in models A and B. For asymmetric systems it contributes models C, D and E which are especially useful when the total masses and/or local temperatures of the two components are greatly different. The kinetic models are discretized based on an octagonal discrete velocity model. The discrete-velocity kinetic models and the continuous ones are required to describe the same hydrodynamic equations. The combination of a discrete-velocity kinetic model and an appropriate finite-difference scheme composes a finite-difference lattice Boltzmann method. The validity of the formulated methods is verified by investigating (i) uniform relaxation processes, (ii) isothermal Couette flow, and (iii) diffusion behavior.

Aiguo Xu

2004-06-01T23:59:59.000Z

395

Targeted coherent search for gravitational waves from compact binary coalescences  

SciTech Connect

We introduce a method for conducting a targeted, coherent search for compact binary coalescences. The search is tailored to be used as a follow-up to electromagnetic transients such as gamma-ray bursts. We derive the coherent search statistic for Gaussian detector noise and discuss the benefits of a coherent, multidetector search over coincidence methods. To mitigate the effects of nonstationary data, we introduce a number of signal consistency tests, including the null signal-to-noise ratio, amplitude consistency, and several {chi}{sup 2} tests. We demonstrate the search performance on Gaussian noise and on data from LIGO's fourth science run and verify that the signal consistency tests are capable of removing the majority of noise transients, giving the search an efficiency comparable to that achieved in Gaussian noise.

Harry, I. W.; Fairhurst, S. [School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff, CF24 3AA (United Kingdom)

2011-04-15T23:59:59.000Z

396

A Massive Pulsar in a Compact Relativistic Binary  

E-Print Network (OSTI)

Many physically motivated extensions to general relativity (GR) predict significant deviations in the properties of spacetime surrounding massive neutron stars. We report the measurement of a 2.01 +/- 0.04 solar mass pulsar in a 2.46-hr orbit with a 0.172 +/- 0.003 solar mass white dwarf. The high pulsar mass and the compact orbit make this system a sensitive laboratory of a previously untested strong-field gravity regime. Thus far, the observed orbital decay agrees with GR, supporting its validity even for the extreme conditions present in the system. The resulting constraints on deviations support the use of GR-based templates for ground-based gravitational wave detectors. Additionally, the system strengthens recent constraints on the properties of dense matter and provides insight to binary stellar astrophysics and pulsar recycling.

John Antoniadis; Paulo C. C. Freire; Norbert Wex; Thomas M. Tauris; Ryan S. Lynch; Marten H. van Kerkwijk; Michael Kramer; Cees Bassa; Vik S. Dhillon; Thomas Driebe; Jason W. T. Hessels; Victoria M. Kaspi; Vladislav I. Kondratiev; Norbert Langer; Thomas R. Marsh; Maura A. McLaughlin; Timothy T. Pennucci; Scott M. Ransom; Ingrid H. Stairs; Joeri van Leeuwen; Joris P. W. Verbiest; David G. Whelan

2013-04-25T23:59:59.000Z

397

Advanced VIRGO: detector optimization for gravitational waves by inspiralling binaries  

E-Print Network (OSTI)

For future configurations, we study the relation between the abatement of the noise sources and the Signal to Noise Ratio (SNR) for coalescing binaries. Our aim is not the proposition of a new design, but an indication of where in the bandwidth or for which noise source, a noise reduction would be most efficient. We take VIRGO as the reference for our considerations, solely applicable to the inspiralling phase of a coalescing binary. Thus, only neutron stars and small black holes of few solar masses are encompassed by our analysis. The contributions to the SNR given by final merge and quasi-normal ringing are neglected. It is identified that i) the reduction in the mirror thermal noise band provides the highest gain for the SNR, when the VIRGO bandwidth is divided according to the dominant noises; ii) it exists a specific frequency at which lies the potential largest increment in the SNR, and that the enlargement of the bandwidth, where the noise is reduced, produces a shift of such optimal frequency to higher values; iii) the abatement of the pendulum thermal noise provides the largest, but modest, gain, when noise sources are considered separately. Our recent astrophysical analysis on event rates for neutron stars leads to a detection rate of one every 148 or 125 years for VIRGO and LIGO, respectively, while a recently proposed and improved, but still conservative, VIRGO configuration would provide an increase to 1.5 events per year. Instead, a bi-monthly event rate, similar to advanced LIGO, requires a 16 times gain. We analyse the 3D (pendulum, mirror, shot noises) parameter space showing how such gain could be achieved.

Alessandro D. A. M. Spallicci; Sofiane Aoudia; Jose De Freitas Pacheco; Giorgio Frossati; Tania Regimbau

2004-06-20T23:59:59.000Z

398

THE INTERACTING EARLY-TYPE BINARY V382 Cyg  

Science Conference Proceedings (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

399

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

SciTech Connect

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

400

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

SciTech Connect

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

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

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

SciTech Connect

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

402

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

Science Conference Proceedings (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

403

Merger of white dwarf-neutron star binaries: Prelude to hydrodynamic simulations in general relativity  

E-Print Network (OSTI)

White dwarf-neutron star binaries generate detectable gravitational radiation. We construct Newtonian equilibrium models of corotational white dwarf-neutron star (WDNS) binaries in circular orbit and find that these models terminate at the Roche limit. At this point the binary will undergo either stable mass transfer (SMT) and evolve on a secular time scale, or unstable mass transfer (UMT), which results in the tidal disruption of the WD. The path a given binary will follow depends primarily on its mass ratio. We analyze the fate of known WDNS binaries and use population synthesis results to estimate the number of LISA-resolved galactic binaries that will undergo either SMT or UMT. We model the quasistationary SMT epoch by solving a set of simple ordinary differential equations and compute the corresponding gravitational waveforms. Finally, we discuss in general terms the possible fate of binaries that undergo UMT and construct approximate Newtonian equilibrium configurations of merged WDNS remnants. We use these configurations to assess plausible outcomes of our future, fully relativistic simulations of these systems. If sufficient WD debris lands on the NS, the remnant may collapse, whereby the gravitational waves from the inspiral, merger, and collapse phases will sweep from LISA through LIGO frequency bands. If the debris forms a disk about the NS, it may fragment and form planets.

Vasileios Paschalidis; Morgan MacLeod; Thomas W. Baumgarte; Stuart L. Shapiro

2009-10-29T23:59:59.000Z

404

Bitraker Anvil: Binary instrumentation for rapid creation of simulation and workload analysis tools  

E-Print Network (OSTI)

A wide range of ARM developers from architects, to compiler writers, to software developers, need tools to understand, analyze, and simulate program behavior. For developers to achieve high levels of system and program correctness, performance, reliability, and power efficiency these tools must be fast and customizable to the problems at hand. BitRaker Anvil is a tool building framework allowing developers to rapidly build tools to achieve these goals. BitRaker Anvil uses binary instrumentation to modify ARM binaries for the purpose of analyzing program behavior. BitRaker Anvil equips the developer with an easy to use API that allows the user to specify the particular program characteristics to analyze. Using this API, the developer can create custom tools to perform simulation or workload analysis several orders of magnitude faster than using a cycle level simulator. Prior binary instrumentation technology requires that analysis code be merged into the same binary as the code to be analyzed. A key new feature of our binary instrumentation framework is ReHost analysis, which allows an instrumented ARM binary to make calls to analysis code that is written in the native format of the desktop machine. Using this for cross-platform ARM development results in analysis that runs orders of magnitude faster while simultaneously reducing the size of the ARM binary images. 1

Brad Calder; Todd Austin; Don Yang; Timothy Sherwood; Suleyman Sair; David Newquist; Tim Cusac

2004-01-01T23:59:59.000Z

405

THE ROSSITER-McLAUGHLIN EFFECT FOR EXOMOONS OR BINARY PLANETS  

SciTech Connect

In this paper, we study possible signatures of binary planets or exomoons on the Rossiter-McLaughlin (R-M) effect. Our analyses show that the R-M effect for a binary planet or an exomoon during its complete transit phase can be divided into two parts. The first is the conventional one similar to the R-M effect from the transit of a single planet, of which the mass and the projected area are the combinations of the binary components; the second is caused by the orbital rotation of the binary components, which may add a sine- or linear-mode deviation to the stellar radial velocity curve. We find that the latter effect can be up to several ten m s{sup -1}. Our numerical simulations as well as analyses illustrate that the distribution and dispersion of the latter effects obtained from multiple transit events can be used to constrain the dynamical configuration of the binary planet, such as how the inner orbit of the binary planet is inclined to its orbit rotating around the central star. We find that the signatures caused by the orbital rotation of the binary components are more likely to be revealed if the two components of a binary planet have different masses and mass densities, especially if the heavy one has a high mass density and the light one has a low density. Similar signatures on the R-M effect may also be revealed in a hierarchical triple star system containing a dark compact binary and a tertiary star.

Zhuang Quntao; Gao Xun; Yu Qingjuan, E-mail: yuqj@pku.edu.cn [Kavli Institute for Astronomy and Astrophysics, and School of Physics, Peking University, Beijing 100871 (China)

2012-10-20T23:59:59.000Z

406

MERGERS OF UNEQUAL-MASS GALAXIES: SUPERMASSIVE BLACK HOLE BINARY EVOLUTION AND STRUCTURE OF MERGER REMNANTS  

SciTech Connect

Galaxy centers are residing places for supermassive black holes (SMBHs). Galaxy mergers bring SMBHs close together to form gravitationally bound binary systems, which, if able to coalesce in less than a Hubble time, would be one of the most promising sources of gravitational waves (GWs) for the Laser Interferometer Space Antenna. In spherical galaxy models, SMBH binaries stall at a separation of approximately 1 pc, leading to the 'final parsec problem' (FPP). On the other hand, it has been shown that merger-induced triaxiality of the remnant in equal-mass mergers is capable of supporting a constant supply of stars on the so-called centrophilic orbits that interact with the binary and thus avoid the FPP. In this paper, using a set of direct N-body simulations of mergers of initially spherically symmetric galaxies with different mass ratios, we show that the merger-induced triaxiality is also able to drive unequal-mass SMBH binaries to coalescence. The binary hardening rates are high and depend only weakly on the mass ratios of SMBHs for a wide range of mass ratios q. There is, however, an abrupt transition in the hardening rates for mergers with mass ratios somewhere between q {approx} 0.05 and 0.1, resulting from the monotonic decrease of merger-induced triaxiality with mass ratio q, as the secondary galaxy becomes too small and light to significantly perturb the primary, i.e., the more massive one. The hardening rates are significantly higher for galaxies having steep cusps in comparison with those having shallow cups at centers. The evolution of the binary SMBH leads to relatively shallower inner slopes at the centers of the merger remnants. The stellar mass displaced by the SMBH binary on its way to coalescence is {approx}1-5 times the combined mass of binary SMBHs. The coalescence timescales for SMBH binary with mass {approx}10{sup 6} M{sub Sun} are less than 1 Gyr and for those at the upper end of SMBH masses 10{sup 9} M{sub Sun} are 1-2 Gyr for less eccentric binaries whereas they are less than 1 Gyr for highly eccentric binaries. SMBH binaries are thus expected to be promising sources of GWs at low and high redshifts.

Khan, Fazeel Mahmood; Preto, Miguel; Berentzen, Ingo; Just, Andreas [Astronomisches Rechen-Institut, Zentrum fuer Astronomie, University of Heidelberg, Moenchhof-Strasse 12-14, 69120 Heidelberg (Germany); Berczik, Peter; Spurzem, Rainer [National Astronomical Observatories of China, Chinese Academy of Sciences, 20A Datun Rd., Chaoyang District, 100012 Beijing (China)

2012-04-20T23:59:59.000Z

407

Effects of Stratification and Bottom Topography on the Kuroshio Path Variation South of Japan. Part I: Dependence of the Path Selection on Velocity  

Science Conference Proceedings (OSTI)

Numerical experiments are executed using a two-layer inflowoutflow ocean model with simplified geometry to investigate the effects of stratification and bottom topography on the path variation of the Kuroshio south of Japan. In a flat-bottom ...

Shuhei Masuda; Kazunori Akitomo; Toshiyuki Awaji

1999-09-01T23:59:59.000Z

408

APSIDAL MOTION OF THE ECLIPSING BINARY AS CAMELOPARDALIS: DISCREPANCY RESOLVED  

SciTech Connect

We present a spectroscopic study of the eclipsing binary system AS Camelopardalis, the first such study based on phase-resolved CCD echelle spectra. Via a spectral disentangling analysis we measure the minimum masses of the stars to be M{sub A}sin {sup 3} i = 3.213 {+-} 0.032 M{sub sun} and M{sub B}sin {sup 3} i = 2.323 {+-} 0.032 M{sub sun}, their effective temperatures to be T{sub eff}(A) = 12, 840 {+-} 120 K and T{sub eff}(B) = 10, 580 {+-} 240 K, and their projected rotational velocities to be v{sub A}sin i{sub A} = 14.5 {+-} 0.1 km s{sup -1} and v{sub B}sin i{sub B} {<=} 4.6 {+-} 0.1 km s{sup -1}. These projected rotational velocities appear to be much lower than the synchronous values. We show that measurements of the apsidal motion of the system suffer from a degeneracy between orbital eccentricity and apsidal motion rate. We use our spectroscopically measured e = 0.164 {+-} 0.004 to break this degeneracy and measure {omega}-dot{sub obs} = 0{sup 0}.133{+-}0{sup 0}.010 yr{sup -1}. Subtracting the relativistic contribution of {omega}-dot{sub GR} = 0{sup 0}.0963{+-}0{sup 0}0002 yr{sup -1} yields the contribution due to tidal torques: {omega}-dot{sub cl} = 0{sup 0}.037{+-}0{sup 0}.010 yr{sup -1}. This value is much smaller than the rate predicted by stellar theory, 0.{sup 0}40-0.{sup 0}87 yr{sup -1}. We interpret this as a misalignment between the orbital axis of the close binary and the rotational axes of its component stars, which also explains their apparently low rotational velocities. The observed and predicted apsidal motion rates could be brought into agreement if the stars were rotating three times faster than synchronous about axes perpendicular to the orbital axis. Measurement of the Rossiter-McLaughlin effect can be used to confirm this interpretation.

Pavlovski, K.; Kolbas, V. [Department of Physics, Faculty of Sciences, University of Zagreb, Zagreb (Croatia); Southworth, J. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG (United Kingdom)

2011-06-20T23:59:59.000Z

409

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

410

Precession-tracking coordinates for simulations of compact-object-binaries  

E-Print Network (OSTI)

Binary black hole simulations with black hole excision using spectral methods require a coordinate transformation into a co-rotating coordinate system where the black holes are essentially at rest. This paper presents and discusses two coordinate transformations that are applicable to precessing binary systems, one based on Euler angles, the other on quaternions. Both approaches are found to work well for binaries with moderate precession, i.e. for cases where the orientation of the orbital plane changes by much less than 90 degrees. For strong precession, performance of the Euler-angle parameterization deteriorates, eventually failing for a 90 degree change in orientation because of singularities in the parameterization ("gimbal lock"). In contrast, the quaternion representation is invariant under an overall rotation, and handles any orientation of the orbital plane as well as the Euler-angle technique handles non-precessing binaries.

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

2013-04-10T23:59:59.000Z

411

Searches for Gravitational Waves from Compact Binary Coalescences with the LIGO and Virgo Detectors  

Science Conference Proceedings (OSTI)

Among the most promising sources of gravitational waves for ground?based detectors are the signals emitted during the coalescence of compact binary systems containing neutron stars or black holes. In recent years

F. Marion; The LIGO Scientific Collaboration; The Virgo Collaboration

2010-01-01T23:59:59.000Z

412

Linking electromagnetic and gravitational radiation in coalescing binary neutron stars Carlos Palenzuela1  

E-Print Network (OSTI)

a fundamental role in the production of gamma ray bursts. These compact binary systems are also among the most model of short, hard gamma ray bursts (SGRBs) (see e.g. [2] for a review). This model envisions

Lumsdaine, Andrew

413

Two-bit message passing decoders for LDPC codes over the binary symmetric channel  

E-Print Network (OSTI)

A class of two-bit message passing decoders for decoding column-weight-four LDPC codes over the binary symmetric channel is proposed. The thresholds for various decoders in this class are derived using density evolution. ...

Sassatelli, Lucille

414

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 approximately 2 years of LIGO data taken between November 2005 and September 2007 for systems with component masses of 1-99 solar masses and total masses of 25-100 solar masses. We did not detect any plausible gravitational-wave signals but we do place upper limits on the merger rate of binary black holes as a function of the component masses in this range. We constrain the rate of mergers for binary black hole systems with component masses between 19 and 28 solar masses and negligible spin to be no more than 2.0 per Mpc^3 per Myr at 90% confidence.

The LIGO Scientific Collaboration; the Virgo Collaboration; J. Abadie; B. P. Abbott; R. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; R. Adhikari; P. Ajith; B. Allen; G. S. Allen; E. Amador Ceron; R. S. Amin; S. B. Anderson; W. G. Anderson; F. Antonucci; M. A. Arain; M. C. Araya; M. Aronsson; Y. Aso; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; S. Babak; P. Baker; G. Ballardin; T. Ballinger; S. Ballmer; D. Barker; S. Barnum; F. Barone; B. Barr; P. Barriga; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; J. Bauchrowitz; Th. S. Bauer; B. Behnke; M. G. Beker; A. Belletoile; M. Benacquista; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; I. A. Bilenko; G. Billingsley; J. Birch; S. Birindelli; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; C. Boccara; O. Bock; T. P. Bodiya; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; M. Boyle; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; J. E. Brau; J. Breyer; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; R. Budzy?ski; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet-Castell; O. Burmeister; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; J. Cain; E. Calloni; J. B. Camp; E. Campagna; P. Campsie; J. Cannizzo; K. Cannon; B. Canuel; J. Cao; C. Capano; F. Carbognani; S. Caride; S. Caudill; M. Cavaglia`; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; O. Chaibi; T. Chalermsongsak; E. Chalkley; P. Charlton; E. Chassande-Mottin; S. Chelkowski; Y. Chen; A. Chincarini; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; D. Clark; J. Clark; J. H. Clayton; F. Cleva; E. Coccia; C. N. Colacino; J. Colas; A. Colla; M. Colombini; R. Conte; D. Cook; T. R. Corbitt; N. Cornish; A. Corsi; C. A. Costa; J. -P. Coulon; D. M. Coward; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; R. M. Culter; A. Cumming; L. Cunningham; E. Cuoco; K. Dahl; S. L. Danilishin; R. Dannenberg; S. D'Antonio; K. Danzmann; K. Das; V. Dattilo; B. Daudert; M. Davier; G. Davies; A. Davis; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; M. del Prete; V. Dergachev; R. DeRosa; R. DeSalvo; P. Devanka; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Daz; A. Dietz; F. Donovan; K. L. Dooley; E. E. Doomes; S. Dorsher; E. S. D. Douglas; M. Drago; R. W. P. Drever; J. C. Driggers; J. Dueck; J. -C. Dumas; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Ely; R. Engel; T. Etzel; M. Evans; T. Evans; V. Fafone; S. Fairhurst; Y. Fan; B. F. Farr; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Fidecaro; L. S. Finn; I. Fiori; R. Flaminio; M. Flanigan; K. Flasch; S. Foley; C. Forrest; E. Forsi; L. A. Forte; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Frasca; F. Frasconi; M. Frede; M. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; P. Fulda; M. Fyffe; M. Galimberti; L. Gammaitoni; J. A. Garofoli; F. Garufi; M. E. Gspr; G. Gemme; E. Genin; A. Gennai; I. Gholami; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; C. Gill; E. Goetz; L. M. Goggin; G. Gonzlez; M. L. Gorodetsky; S. Goler; R. Gouaty; C. Graef; M. Granata; A. Grant; S. Gras; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Greverie; R. Grosso; H. Grote; S. Grunewald; G. M. Guidi; E. K. Gustafson; R. Gustafson; B. Hage; P. Hall; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; K. Haughian; K. Hayama; J. -F. Hayau; T. Hayler; J. Heefner; H. Heitmann; P. Hello; I. S. Heng; A. W. Heptonstall; M. Hewitson; S. Hild; E. Hirose; D. Hoak; K. A. Hodge; K. Holt; D. J. Hosken; J. Hough; E. J. Howell; D. Hoyland; D. Huet; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; P. Jaranowski; W. W. Johnson; D. I. Jones; G. Jones; R. Jones; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; J. B. Kanner; E. Katsavounidis; K. Kawabe; S. Kawamura; F. Kawazoe; W. Kells; D. G. Keppel; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; H. Kim; P. J. King; D. L. Kinzel; J. S. Kissel; S. Klimenko; V. Kondrashov; R. Kopparapu; S. Koranda; I. Kowalska; D. Kozak; T. Krause; V. Kringel; S. Krishnamurthy; B. Krishnan; A. Krlak; G. Kuehn; J. Kullman; R. Kumar; P. Kwee; M. Landry; M. Lang; B. Lantz; N. Lastzka; A. Lazzarini; P. Leaci; J. Leong; I. Leonor; N. Leroy; N. Letendre; J. Li; T. G. F. Li; N. Liguori; H. Lin; P. E. Lindquist; N. A. Lockerbie; D. Lodhia; M. Lorenzini; V. Loriette; M. Lormand; G. Losurdo; P. Lu; J. Luan; M. Lubinski; A. Lucianetti; H. Lck; A. D. Lundgren; B. Machenschalk; M. MacInnis; M. Mageswaran; K. Mailand; E. Majorana

2011-02-18T23:59:59.000Z

415

Binaries, cluster dynamics and population studies of stars and stellar phenomena  

E-Print Network (OSTI)

The effects of binaries on population studies of stars and stellar phenomena have been investigated over the past 3 decades by many research groups. Here we will focus mainly on the work that has been done recently in Brussels and we will consider the following topics: the effect of binaries on overall galactic chemical evolutionary models and on the rates of different types of supernova, the population of point-like X-ray sources where we distinguish the standard high mass X-ray binaries and the ULXs, a UFO-scenario for the formation of WR+OB binaries in dense star systems. Finally we critically discuss the possible effect of rotation on population studies.

Vanbeveren, D

2004-01-01T23:59:59.000Z

416

Binaries, cluster dynamics and population studies of stars and stellar phenomena  

E-Print Network (OSTI)

The effects of binaries on population studies of stars and stellar phenomena have been investigated over the past 3 decades by many research groups. Here we will focus mainly on the work that has been done recently in Brussels and we will consider the following topics: the effect of binaries on overall galactic chemical evolutionary models and on the rates of different types of supernova, the population of point-like X-ray sources where we distinguish the standard high mass X-ray binaries and the ULXs, a UFO-scenario for the formation of WR+OB binaries in dense star systems. Finally we critically discuss the possible effect of rotation on population studies.

D. Vanbeveren

2004-11-09T23:59:59.000Z

417

The accretion process in neutron-star low-mass X-ray binaries  

E-Print Network (OSTI)

There had been long-standing fundamental problems in the spectral studies of accreting neutron stars (NSs) in low-mass X-ray binaries involving the X-ray spectral decomposition, the relations between subtypes (mainly atoll ...

Lin, Dacheng

2009-01-01T23:59:59.000Z

418

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

419

Modeling Seasonal Tropical Cyclone Activity in the Fiji Region as a Binary Classification Problem  

Science Conference Proceedings (OSTI)

This study presents a binary classification model for the prediction of tropical cyclone (TC) activity in the Fiji, Samoa, and Tonga regions (the FST region) using the accumulated cyclone energy (ACE) as a proxy of TC activity. A probit regression ...

Savin S. Chand; Kevin J. E. Walsh

2012-07-01T23:59:59.000Z

420

Community Geothermal Technology Program: Bottom heating system using geothermal power for propagation. Final report, Phases 1 and 2  

DOE Green Energy (OSTI)

The objective is to develop and study a bottom-heating system in a greenhouse utilizing geothermal energy to aid germination and speed growth of palms. Source of heat was geothermal brine from HGP-A well. The project was successful; the heat made a dramatic difference with certain varieties, such as Areca catechu (betelnut) with 82% germination with heat, zero without. For other varieties, germination rates were much closer. Quality of seed is important. Tabs, figs.

Downing, J.C.

1990-01-01T23:59:59.000Z

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.


421

Binary and ternary gas mixtures for use in glow discharge closing switches  

SciTech Connect

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 of the combined physio-electric properties of the mixture components.

Hunter, Scott R. (Oak Ridge, TN); Christophorou, Loucas G. (Oak Ridge, TN)

1990-01-01T23:59:59.000Z

422

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

SciTech Connect

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

423

A burst search for gravitational waves from binary black holes  

E-Print Network (OSTI)

Compact binary coalescence (CBC) is one of the most promising sources of gravitational waves. These sources are usually searched for with matched filters which require accurate calculation of the GW waveforms and generation of large template banks. We present a complementary search technique based on algorithms used in un-modeled searches. Initially designed for detection of un-modeled bursts, which can span a very large set of waveform morphologies, the search algorithm presented here is constrained for targeted detection of the smaller subset of CBC signals. The constraint is based on the assumption of elliptical polarisation for signals received at the detector. We expect that the algorithm is sensitive to CBC signals in a wide range of masses, mass ratios, and spin parameters. In preparation for the analysis of data from the fifth LIGO-Virgo science run (S5), we performed preliminary studies of the algorithm on test data. We present the sensitivity of the search to different types of simulated CBC waveforms. Also, we discuss how to extend the results of the test run into a search over all of the current LIGO-Virgo data set.

C. Pankow; S. Klimenko; G. Mitselmakher; I. Yakushin; G. Vedovato; M. Drago; R. A. Mercer; P. Ajith

2009-05-19T23:59:59.000Z

424

GAMMA-RAY BURSTS FROM NEUTRON STAR BINARIES  

E-Print Network (OSTI)

We report on general relativistic hydrodynamic studies which indicate several new physical processes which may contribute to powering gamma-ray bursts in neutron star binaries. Relativistically driven compression, heating, and collapse of the individual stars can occur many seconds before inspiral and merger. This compression may produce a neutrino burst of ? 10 53 ergs lasting several seconds. The associated thermal neutrino emission produces an e + ? e ? pair plasma by ?? annihilation. We show first results of a simulated burst which produces ? 10 51 erg in ?-rays. We also discuss a preliminary study of the evolution of the magnetic field lines attached to the fluid as the stars orbit. We show that the relativistically driven fluid motion might lead to the formation of extremely strong magnetic fields ( ? 10 17 gauss) in and around the stars which could affect to the formation and evolution of a gamma-ray burst. It has been speculated for some time that inspiraling neutron stars could provide a power source for cosmological gamma-ray bursts. The rate of neutron star mergers (when integrated over the number of galaxies out to high redshift) could account for the observed GRB event rate. The possibility that at least some ?-ray bursts involve

G. J. Mathews

1997-01-01T23:59:59.000Z

425

A Survey for Young Spectroscopic Binary K7-M4 Stars in Ophiuchus  

E-Print Network (OSTI)

This paper describes a high-resolution, infrared spectroscopic survey of young, low-mass stars designed to identify and characterize pre-main-sequence spectroscopic binaries. This is the first large infrared radial velocity survey of very young stars to date. The frequency and mass ratio distribution of the closest, low-mass binaries bear directly on models of stellar, brown dwarf, and planetary mass companion formation. Furthermore, spectroscopic binaries can provide mass ratios and ultimately masses, independent of assumptions, needed to calibrate models of young star evolution. I present the initial results from observations of a uniform sample of 33 T Tauri M stars in the Ophiuchus molecular cloud. The average mass of this sample is less than that of other young star radial velocity surveys of similar scope by a factor of ~2. Almost every star was observed at 3-4 epochs over 3 years with the 10 meter Keck II telescope and the facility infrared spectrometer NIRSPEC. An internal precision of 0.43 km/s was obtained with standard cross-correlation calibration techniques. Four of the targets are newly discovered spectroscopic binaries, one of which is located in a sub-arcsecond, hierarchical quadruple system. Three other sub-arcsecond visual binaries were also serendipitously identified during target acquisition. The spectroscopic multiplicity of the sample is comparable to that of earlier type, pre-main-sequence objects. Therefore, there is no dearth of young, low-mass spectroscopic binary stars, at least in the Ophiuchus region.

L. Prato

2006-11-20T23:59:59.000Z

426

SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM  

SciTech Connect

During a galaxy merger, the supermassive black hole (SMBH) in each galaxy is thought to sink to the center of the potential and form an SMBH binary; this binary can eject stars via three-body scattering, bringing the SMBHs ever closer. In a static spherical galaxy model, the binary stalls at a separation of about a parsec after ejecting all the stars in its loss cone-this is the well-known final parsec problem. Earlier work has shown that the centrophilic orbits in triaxial galaxy models are key in refilling the loss cone at a high enough rate to prevent the black holes from stalling. However, the evolution of binary SMBHs has never been explored in axisymmetric galaxies, so it is not clear if the final parsec problem persists in these systems. Here we use a suite of direct N-body simulations to follow SMBH binary evolution in galaxy models with a range of ellipticity. For the first time, we show that mere axisymmetry can solve the final parsec problem; we find the SMBH evolution is independent of N for an axis ratio of c/a = 0.8, and that the SMBH binary separation reaches the gravitational radiation regime for c/a = 0.75.

Khan, Fazeel Mahmood [Department of Space Science, Institute of Space Technology, P.O. Box 2750 Islamabad (Pakistan); Holley-Bockelmann, Kelly [Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States); Berczik, Peter; Just, Andreas, E-mail: khan@ari.uni-heidelberg.de, E-mail: just@ari.uni-heidelberg.de, E-mail: berczik@ari.uni-heidelberg.de, E-mail: k.holley@vanderbilt.edu [Astronomisches Rechen-Institut, Zentrum fuer Astronomie, University of Heidelberg, Moenchhof-Strasse 12-14, D-69120 Heidelberg (Germany)

2013-08-20T23:59:59.000Z

427

Vibration Suppression and Flywheel Energy Storage in a Drillstring Bottom-Hole-Assembly  

E-Print Network (OSTI)

In this study, a novel concept for a downhole flywheel energy storage module to be embedded in a bottom-hole-assembly (BHA) is presented and modeled, as an alternative power source to existing lithium-ion battery packs currently deployed in measurement-while-drilling (MWD) or logging-while-drilling (LWD) operations. Lithium-ion batteries disadvantages include deteriorated performance in high temperature, limited lifetime that necessitates frequent replacement which elevates operational costs, and environmental disposal. Extreme and harsh downhole conditions necessitate that the flywheel module withstands temperatures and pressures exceeding 300 ?F and 20 kpsi, respectively, as well as violent vibrations encountered during drilling. Moreover, the flywheel module should adhere to the geometric constraints of the wellbore and its corresponding BHA. Hence, a flywheel sizing procedure was developed that takes into consideration the required energy to be stored, the surrounding environmental conditions, and the geometric constraints. A five-axis magnetic levitation control system was implemented and tuned to maintain continuous suspension of the flywheel under the harsh lateral, axial and torsional drilling vibrations of the BHA. Thus, an integrated finite element model was developed that included the rotordynamic behavior of the flywheel and the BHA, the component dynamics of the magnetic levitation control system, and the cutting dynamics of the drillbit for both PDC and tricone types. The model also included a newly developed coupling between lateral, axial and torsional vibrations. It was demonstrated through simulations conducted by numerical integration that the flywheel maintains levitation due to all different types of external vibration as well as its own lateral vibration due to mass unbalance. Moreover, a passive proof-mass-damper (PPMD) was developed that suppresses axial bit-bounce vibrations as well as torsional vibrations, and was extended to also mitigate lateral vibrations. Optimized values of the mass, stiffness and damping values of the PPMD were obtained by the hybrid analytical-numerical Chebyshev spectral method that was superior in computational efficiency to iterative numerical integration. This also enabled the fine-plotting of an operating stability chart indicating stability regions where bit-bounce and stick-slip are avoided. The proof-mass-damping concept was extended to the flywheel to be an active proof-mass-damper (APMD) where simulations indicated functionality for a light-weight BHA.

Saeed, Ahmed

2012-05-01T23:59:59.000Z

428

Mechanisms in the size segregation of a binary granular mixture  

E-Print Network (OSTI)

A granular mixture of particles of two sizes that is shaken vertically will in most cases segregate. If the larger particles accumulate at the top of the sample, this is called the Brazil-nut effect (BNE); if they accumulate at the bottom, the reverse Brazil-nut effect (RBNE). While this process is of great industrial importance in the handling of bulk solids, it is not well understood. In recent years ten different mechanisms have been suggested to explain when each type of segregation is observed. However, the dependence of the mechanisms on driving conditions and material parameters and hence their relative importance is largely unknown. In this paper we present experiments and simulations where both types of particles are made from the same material and shaken under low air pressure, which reduces the number of mechanisms to be considered to seven. We observe both BNE and RBNE by varying systematically the driving frequency and amplitude, diameter ratio, ratio of total volume of small to large particles, and overall sample volume. All our results can be explained by a combination of three mechanisms: a geometrical mechanism called void filling, transport of particles in sidewall-driven convection rolls, and thermal diffusion, a mechanism predicted by kinetic theory.

M. Schrter; S. Ulrich; J. Kreft; J. B. Swift; H. L. Swinney

2006-01-10T23:59:59.000Z

429

BWRVIP-124: BWR Vessel and Internals Project: Post-NMCA Fuel Surveillance Report on Peach Bottom 2 after Two Cycles (EOC 14)  

Science Conference Proceedings (OSTI)

Noble metal chemical application (NMCA) was performed at Peach Bottom Unit 2 during the end of cycle 12 (EOC12) in 1998. The first post-NMCA fuel inspection performed at EOC13 revealed cladding corrosion enhancement with evidence of oxide delamination at the bottom span of some third-cycle rods. In the second fuel surveillance performed at EOC14 in 2002, no corrosion enhancement at the bottom span was observed. Many second- and third-cycle rods exhibited tenacious crud with localized surface spallation&m...

2003-11-24T23:59:59.000Z

430

GALACTIC ULTRACOMPACT X-RAY BINARIES: DISK STABILITY AND EVOLUTION  

SciTech Connect

We study the mass-transfer rates and disk stability conditions of ultracompact X-ray binaries (UCXBs) using empirical time-averaged X-ray luminosities from Paper I and compiled information from the literature. The majority of UCXBs are consistent with evolutionary tracks for white dwarf donors. Three UCXBs with orbital periods longer than 40 minutes have mass-transfer rates above 10{sup -10} M{sub Sun} yr{sup -1}, inconsistent with white dwarf donor tracks. We show that if helium star donors can retain their initial high entropy, they can explain the observed mass-transfer rates of these UCXBs. Several UCXBs show persistent luminosities apparently below the disk instability limit for irradiated He accretion disks. We point out that a predominantly C and/or O disk (as observed in the optical spectra of several) lowers the disk instability limit, explaining this disagreement. The orbital period and low time-averaged mass-transfer rate of 2S 0918-549 provide evidence that the donor star is a low-entropy C/O white dwarf, consistent with optical spectra. We combine existing information to constrain the masses of the donors in 4U 1916-053 (0.064 {+-} 0.010 M{sub Sun }) and 4U 1626-67 (<0.036 M{sub Sun} for a 1.4 M{sub Sun} neutron star). We show that 4U 1626-67 is indeed persistent, and not undergoing a transient outburst, leaving He star models as the best explanation for the donor.

Heinke, C. O.; Ivanova, N.; Engel, M. C.; Pavlovskii, K.; Sivakoff, G. R.; Gladstone, J. C. [Physics Department, University of Alberta, 4-183 CCIS, Edmonton, AB T6G 2E1 (Canada); Cartwright, T. F., E-mail: heinke@ualberta.ca [International Space University, 1 rue Jean-Dominique Cassini, 67400 Illkirch-Graffenstaden (France)

2013-05-10T23:59:59.000Z

431

A CCD Imaging Search for Wide Metal-Poor Binaries  

E-Print Network (OSTI)

We explored the regions within a radius of 25 arcsec around 473 nearby, low-metallicity G- to M-type stars using (VR)I optical filters and small-aperture telescopes. About 10% of the sample was searched up to angular separations of 90 arcsec. We applied photometric and astrometric techniques to detect true physical companions to the targets. The great majority of the sample stars was drawn from the Carney-Latham surveys; their metallicities range from roughly solar to [Fe/H]=-3.5 dex. Our I-band photometric survey detected objects that are between 0 and 5 mag fainter (completeness) than the target stars; the maximum dynamical range of our exploration is 9 mag. We also investigated the literature and inspected images from the Digitized Sky Surveys to complete our search. By combining photometric and proper motion measurements, we retrieved 29 previously known companions, and identified 13 new proper motion companions. Near-infrared 2MASS photometry is provided for the great majority of them. Low-resolution optical spectroscopy (386-1000 nm) was obtained for eight of the new companion stars. These spectroscopic data confirm them as cool, late-type, metal-depleted dwarfs, with spectral classes from esdK7 to sdM3. After comparison with low-metallicity evolutionary models, we estimate the masses of the proper motion companion stars to be in the range 0.5-0.1 Msol. They are orbiting their primary stars at projected separations between ~32 and ~57000 AU. These orbital sizes are very similar to those of solar-metallicity stars of the same spectral types. Our results indicate that about 15% of the metal-poor stars have stellar companions at large orbits, which is in agreement with the binary fraction observed among main sequence G- to M-type stars and T Tauri stars.

M. R. Zapatero Osorio; E. L. Martin

2004-02-12T23:59:59.000Z

432

Molecular Design of Branched and Binary Molecules at Ordered Interfaces  

SciTech Connect

This study examined five different branched molecular architectures to discern the effect of design on the ability of molecules to form ordered structures at interfaces. Photochromic monodendrons formed kinked packing structures at the air-water interface due to the cross-sectional area mismatch created by varying number of alkyl tails and the hydrophilic polar head group. The lower generations formed orthorhombic unit cell with long range ordering despite the alkyl tails tilted to a large degree. Favorable interactions between liquid crystalline terminal groups and the underlying substrate were observed to compel a flexible carbosilane dendrimer core to form a compressed elliptical conformation which packed stagger within lamellae domains with limited short range ordering. A twelve arm binary star polymer was observed to form two dimensional micelles at the air-water interface attributed to the higher polystyrene block composition. Linear rod-coil molecules formed a multitude of packing structures at the air-water interface due to the varying composition. Tree-like rod-coil molecules demonstrated the ability to form one-dimensional structures at the air-water interface and at the air-solvent interface caused by the preferential ordering of the rigid rod cores. The role of molecular architecture and composition was examined and the influence chemically competing fragments was shown to exert on the packing structure. The amphiphilic balance of the different molecular series exhibited control on the ordering behavior at the air-water interface and within bulk structures. The shell nature and tail type was determined to dictate the preferential ordering structure and molecular reorganization at interfaces with the core nature effect secondary.

Kirsten Larson Genson

2005-12-27T23:59:59.000Z

433

Binary electrokinetic separation of target DNA from background DNA primers.  

Science Conference Proceedings (OSTI)

This report contains the summary of LDRD project 91312, titled ''Binary Electrokinetic Separation of Target DNA from Background DNA Primers''. This work is the first product of a collaboration with Columbia University and the Northeast BioDefense Center of Excellence. In conjunction with Ian Lipkin's lab, we are developing a technique to reduce false positive events, due to the detection of unhybridized reporter molecules, in a sensitive and multiplexed detection scheme for nucleic acids developed by the Lipkin lab. This is the most significant problem in the operation of their capability. As they are developing the tools for rapidly detecting the entire panel of hemorrhagic fevers this technology will immediately serve an important national need. The goal of this work was to attempt to separate nucleic acid from a preprocessed sample. We demonstrated the preconcentration of kilobase-pair length double-stranded DNA targets, and observed little preconcentration of 60 base-pair length single-stranded DNA probes. These objectives were accomplished in microdevice formats that are compatible with larger detection systems for sample pre-processing. Combined with Columbia's expertise, this technology would enable a unique, fast, and potentially compact method for detecting/identifying genetically-modified organisms and multiplexed rapid nucleic acid identification. Another competing approach is the DARPA funded IRIS Pharmaceutical TIGER platform which requires many hours for operation, and an 800k$ piece of equipment that fills a room. The Columbia/SNL system could provide a result in 30 minutes, at the cost of a few thousand dollars for the platform, and would be the size of a shoebox or smaller.

James, Conrad D.; Derzon, Mark Steven

2005-10-01T23:59:59.000Z

434

Observational studies of stellar black hole binaries and ULXs  

E-Print Network (OSTI)

We outline a framework for understanding the X-ray spectra of high mass accretion rate stellar black holes based on X-ray data from RXTE and ASCA. Three spectral regimes can be separated out by the behaviour of the observed disk luminosity and temperature. The well established "standard regime" is seen when the disk dominates the spectrum, where only a small fraction of the luminosity is emitted in the power law tail. These spectra generally satisfy the standard relation expected for thermal emission from a constant area, namely that the disk bolometric luminosity, Ldisk, is proportional to its maximum temperature, Tin^4. However, at higher luminosities this starts to change to Tin^2. This "apparently standard regime" is still dominated by the disk emission, but this difference luminosity-temperature relation and subtle changes in spectral shape may show that another cooling process is required in addition to radiative cooling. At intermediate luminosities there is an anomalous regime (or weak very high state) where the disk temperature and luminosity are less clearly related. These spectra are characterized by the presence of a much stronger comptonized tail indicating high energy electrons. When observed disk emission is corrected for the the effects of comptonisation then these points lie back on the standard relation. The growth of this comptonising corona is also clearly linked to the quasi-periodic oscillations, as these are observed preferentially in the anomalous regime. This presented picture was found to explain the spectral behavior of both black hole binaries in our Galaxy and LMC. Spectral evolution of several bright ULXs observed with ASCA were also successfully explained in the same picture.

Aya Kubota; Kazuo Makishima

2005-07-12T23:59:59.000Z

435

MULTIPLE INPUT BINARY ADDER EMPLOYING MAGNETIC DRUM DIGITAL COMPUTING APPARATUS  

DOE Patents (OSTI)

A digital computing apparatus is described for adding a plurality of multi-digit binary numbers. The apparatus comprises a rotating magnetic drum, a recording head, first and second reading heads disposed adjacent to the first and second recording tracks, and a series of timing signals recorded on the first track. A series of N groups of digit-representing signals is delivered to the recording head at time intervals corresponding to the timing signals, each group consisting of digits of the same significance in the numbers, and the signal series is recorded on the second track of the drum in synchronism with the timing signals on the first track. The multistage registers are stepped cyclically through all positions, and each of the multistage registers is coupled to the control lead of a separate gate circuit to open the corresponding gate at only one selected position in each cycle. One of the gates has its input coupled to the bistable element to receive the sum digit, and the output lead of this gate is coupled to the recording device. The inputs of the other gates receive the digits to be added from the second reading head, and the outputs of these gates are coupled to the adding register. A phase-setting pulse source is connected to each of the multistage registers individually to step the multistage registers to different initial positions in the cycle, and the phase-setting pulse source is actuated each N time interval to shift a sum digit to the bistable element, where the multistage register coupled to bistable element is operated by the phase- setting pulse source to that position in its cycle N steps before opening the first gate, so that this gate opens in synchronism with each of the shifts to pass the sum digits to the recording head.

Cooke-Yarborough, E.H.

1960-12-01T23:59:59.000Z

436

Modeling of Emission Signatures of Massive Black Hole Binaries: I Methods  

E-Print Network (OSTI)

We model the electromagnetic signatures of massive black hole binaries (MBHBs) with an associated gas component. The method comprises numerical simulations of relativistic binaries and gas coupled with calculations of the physical properties of the emitting gas. We calculate the UV/X-ray and the Halpha light curves and the Halpha emission profiles. The simulations are carried out with a modified version of the parallel tree SPH code Gadget. The heating, cooling, and radiative processes are calculated for two different physical scenarios, where the gas is approximated as a black-body or a solar metallicity gas. The calculation for the solar metallicity scenario is carried out with the photoionization code Cloudy. We focus on sub-parsec binaries which have not yet entered the gravitational radiation phase. The results from the first set of calculations, carried out for a coplanar binary and gas disk, suggest that there are pronounced outbursts in the X-ray light curve during pericentric passages. If such outbursts persist for a large fraction of the lifetime of the system, they can serve as an indicator of this type of binary. The predicted Halpha emission line profiles may be used as a criterion for selection of MBHB candidates from existing archival data. The orbital period and mass ratio of a binary may be inferred after carefully monitoring the evolution of the Halpha profiles of the candidates. The discovery of sub-parsec binaries is an important step in understanding of the merger rates of MBHBs and their evolution towards the detectable gravitational wave window.

Tamara Bogdanovic; Britton D. Smith; Steinn Sigurdsson; Michael Eracleous

2007-08-02T23:59:59.000Z

437

Tracking the precession of compact binaries from their gravitational-wave signal  

E-Print Network (OSTI)

We present a simple method to track the precession of a black-hole-binary system, using only information from the gravitational-wave (GW) signal. Our method consists of locating the frame from which the magnitude of the $(\\ell=2,|m|=2)$ modes is maximized, which we denote the "quadrupole-aligned" frame. We demonstrate the efficacy of this method when applied to waveforms from numerical simulations. In the test case of an equal-mass nonspinning binary, our method locates the direction of the orbital angular momentum to within $(\\Delta \\theta, \\Delta \\phi) = (0.05^{\\circ},0.2^{\\circ})$. We then apply the method to a $q = M_2/M_1 = 3$ binary that exhibits significant precession. In general a spinning binary's orbital angular momentum $\\mathbf{L}$ is \\emph{not} orthogonal to the orbital plane. Evidence that our method locates the direction of $\\mathbf{L}$ rather than the normal of the orbital plane is provided by comparison with post-Newtonian (PN) results. Also, we observe that it accurately reproduces similar higher-mode amplitudes to a comparable non-spinning (and therefore non-precessing) binary, and that the frequency of the $(\\ell=2,|m|=2)$ modes is consistent with the "total frequency" of the binary's motion. The simple form of the quadrupole-aligned waveform will be useful in attempts to analytically model the inspiral-merger-ringdown (IMR) signal of precessing binaries, and in standardizing the representation of waveforms for studies of accuracy and consistency of source modelling efforts, both numerical and analytical.

Patricia Schmidt; Mark Hannam; Sascha Husa; P. Ajith

2010-12-13T23:59:59.000Z

438

A Large-Eddy Simulation Study of Bottom-Heating Effects on Scalar Dispersion in and above a Cubical Building Array  

Science Conference Proceedings (OSTI)

Thermal effects on scalar dispersion in and above a cubical building array are numerically investigated using the parallelized large-eddy simulation model (PALM). Two cases (no heating and bottom heating) are simulated, and scalar dispersion ...

Seung-Bu Park; Jong-Jin Baik; Young-Hee Ryu

2013-08-01T23:59:59.000Z

439

Thermodynamic considerations in the stability of binary oxides for alternative gate dielectrics in complementary metal-oxide-semiconductors  

E-Print Network (OSTI)

Thermodynamic Considerations in the Stability of BinaryIn this paper, a thermodynamic analysis of the proposedS CHLOM evaluated the thermodynamic stability of a large set

Stemmer, Susanne

2004-01-01T23:59:59.000Z

440

Heber Geothermal Project, binary-cycle demonstration plant. Volume II. Proposal abstract  

SciTech Connect

San Diego Gas and Electric (SDG and E) believes that the binary-cycle offers an improved method of converting moderate temperature geothermal resources into electric power. The process, shown schematically in figure 1-1, has significant advantages over existing methods of geothermal power generation. The advantages of the binary process are that greater amounts of power can be generated from a given resource, fewer wells are needed to support a given power output, and the binary-cycle is expected to be more economical than the flash process for this type of resource. Another advantage is that the binary-cycle is a closed process and thus enhances environmental acceptability. In addition, this process is applicable to a larger range of the nations geothermal reservoirs. It is estimated that 80% of the nation's hydrothermal resources can be classified as moderate temperature (300 to 410 F) resources. The flash process, commonly used to convert high temperature geothermal resources to electric power, is technically feasible for moderate temperature resources. However, when compared to the binary process for moderate temperature applications, the flash process conversion efficiency is lower, environmental impacts may require abatement, and power production costs may not be commercially competitive.

Lacy, R.G.

1979-12-01T23:59:59.000Z

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441

Spectral distribution of Be/X-ray binaries in the Small Magellanic Cloud  

E-Print Network (OSTI)

The spectral distributions of Be/X-ray binaries in the Large Magellanic Cloud and Galaxy have been shown to differ significantly from the distribution of isolated Be stars in the Galaxy. Population synthesis models can explain this difference in spectral distributions through substantial angular momentum loss from the binary system. In this work we explore the spectral distribution of Be/X-ray binaries in the Small Magellanic Cloud (SMC) using high signal-to-noise spectroscopy of a sample of 37 optical counterparts to known X-ray pulsars. Our results show that the spectral distribution of Be/X-ray binaries in the SMC is consistent with that of the Galaxy, despite the lower metallicity environment of the SMC. This may indicate that, although the metallicity of the SMC is conducive to the formation of a large number of HMXBs, the spectral distribution of these systems is likely to be most strongly influenced by angular momentum losses during binary evolution, which are not particularly dependent on the local metallicity.

V. A. McBride; M. J. Coe; I. Negueruela; M. P. E. Schurch; K. E. McGowan

2008-04-30T23:59:59.000Z

442

EXPECTED LARGE SYNOPTIC SURVEY TELESCOPE (LSST) YIELD OF ECLIPSING BINARY STARS  

Science Conference Proceedings (OSTI)

In this paper, we estimate the Large Synoptic Survey Telescope (LSST) yield of eclipsing binary stars, which will survey {approx}20,000 deg{sup 2} of the southern sky during a period of 10 years in six photometric passbands to r {approx} 24.5. We generate a set of 10,000 eclipsing binary light curves sampled to the LSST time cadence across the whole sky, with added noise as a function of apparent magnitude. This set is passed to the analysis-of-variance period finder to assess the recoverability rate for the periods, and the successfully phased light curves are passed to the artificial-intelligence-based pipeline ebai to assess the recoverability rate in terms of the eclipsing binaries' physical and geometric parameters. We find that, out of {approx}24 million eclipsing binaries observed by LSST with a signal-to-noise ratio >10 in mission lifetime, {approx}28% or 6.7 million can be fully characterized by the pipeline. Of those, {approx}25% or 1.7 million will be double-lined binaries, a true treasure trove for stellar astrophysics.

Prsa, Andrej [Department of Astronomy and Astrophysics, Villanova University, 800 East Lancaster Avenue, Villanova, PA 19085 (United States); Pepper, Joshua; Stassun, Keivan G., E-mail: andrej.prsa@villanova.edu [Physics and Astronomy Department, Vanderbilt University, 2201 West End Avenue, Nashville, TN 37235 (United States)

2011-08-15T23:59:59.000Z

443

DC CIRCUIT POWERED BY ORBITAL MOTION: MAGNETIC INTERACTIONS IN COMPACT OBJECT BINARIES AND EXOPLANETARY SYSTEMS  

Science Conference Proceedings (OSTI)

The unipolar induction DC circuit model, originally developed by Goldreich and Lynden-Bell for the Jupiter-Io system, has been applied to different types of binary systems in recent years. We show that there exists an upper limit to the magnetic interaction torque and energy dissipation rate in such a model. This arises because when the resistance of the circuit is too small, the large current flow severely twists the magnetic flux tube connecting the two binary components, leading to the breakdown of the circuit. Applying this limit, we find that in coalescing neutron star binaries, magnetic interactions produce negligible correction to the phase evolution of the gravitational waveform, even for magnetar-like field strengths. However, energy dissipation in the binary magnetosphere may still give rise to electromagnetic radiation prior to the final merger. For ultracompact white dwarf binaries, we find that unipolar induction does not provide adequate energy dissipation to explain the observed X-ray luminosities of several sources. For exoplanetary systems containing close-in Jupiters or super-Earths, the magnetic torque and energy dissipation induced by the orbital motion are negligible, except possibly during the early T Tauri phase, when the stellar magnetic field is stronger than 10{sup 3} G.

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

2012-09-20T23:59:59.000Z

444

Gravitational Binary-lens Events with Prominent Effects of Lens Orbital Motion  

E-Print Network (OSTI)

Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel to determine physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events OGLE-2006-BLG-277 and OGLE-2012-BLG-0031 for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a ...

Park, H; Han, C; Gould, A; Beaulieu, J -P; Tsapras, Y; Szyma?ski, M K; Kubiak, M; Soszy?ski, I; Pietrzy?ski, G; Poleski, R; Ulaczyk, K; Pietrukowicz, P; Koz?owski, S; Skowron, J; Wyrzykowski, ?; Choi, J -Y; Depoy, D L; Dong, Subo; Gaudi, B S; Hwang, K -H; Jung, Y K; Kavka, A; Lee, C -U; Monard, L A G; Park, B -G; Pogge, R W; Porritt, I; Shin, I -G; Yee, J C; Albrow, M D; Bennett, D P; Caldwell, J A R; Cassan, A; Coutures, C; Dominis, D; Donatowicz, J; Fouqu, P; Greenhill, J; Huber, M; Jrgensen, U G; Kane, S; Kubas, D; Marquette, J -B; Menzies, J; Pitrou, C; Pollard, K R; Sahu, K C; Wambsganss, J; Williams, A; Zub, M; Allan, A; Bramich, D M; Browne, P; Dominik, M; Horne, K; Hundertmark, M; Kains, N; Snodgrass, C; Steele, I A; Street, R A

2013-01-01T23:59:59.000Z

445

Gravitational Radiation from Post-Newtonian Sources and Inspiralling Compact Binaries  

E-Print Network (OSTI)

To be observed and analyzed by the network of gravitational wave detectors on ground (LIGO, VIRGO, etc.) and by the future detectors in space (LISA, etc.), inspiralling compact binaries --- binary star systems composed of neutron stars and/or black holes in their late stage of evolution --- require high-accuracy templates predicted by general relativity theory. The gravitational waves emitted by these very relativistic systems can be accurately modelled using a high-order post-Newtonian gravitational wave generation formalism. In this article, we present the current state of the art on post-Newtonian methods as applied to the dynamics and gravitational radiation of general matter sources (including the radiation reaction back onto the source) and inspiralling compact binaries. We describe the post-Newtonian equations of motion, pay attention to the self-field regularizations at work, discuss several notions of innermost circular orbits, estimate the accuracy of the approximation and make a comparison with numerical gravitational self-force computations. The gravitational waveform and energy flux are obtained with high post-Newtonian precision. Some landmark results are discussed in the case of eccentric compact binaries moving on quasi-elliptical orbits, and on spin-orbit coupling effects in black hole binaries.

Luc Blanchet

2013-10-06T23:59:59.000Z

446

Heber Geothermal Project, binary-cycle demonstration plant. Volume II. Proposal abstract  

DOE Green Energy (OSTI)

San Diego Gas and Electric (SDG and E) believes that the binary-cycle offers an improved method of converting moderate temperature geothermal resources into electric power. The process, shown schematically in figure 1-1, has significant advantages over existing methods of geothermal power generation. The advantages of the binary process are that greater amounts of power can be generated from a given resource, fewer wells are needed to support a given power output, and the binary-cycle is expected to be more economical than the flash process for this type of resource. Another advantage is that the binary-cycle is a closed process and thus enhances environmental acceptability. In addition, this process is applicable to a larger range of the nations geothermal reservoirs. It is estimated that 80% of the nation's hydrothermal resources can be classified as moderate temperature (300 to 410 F) resources. The flash process, commonly used to convert high temperature geothermal resources to electric power, is technically feasible for moderate temperature resources. However, when compared to the binary process for moderate temperature applications, the flash process conversion efficiency is lower, environmental impacts may require abatement, and power production costs may not be commercially competitive.

Lacy, R.G.

1979-12-01T23:59:59.000Z

447

Preliminary reliability and availability analysis of the Heber geothermal binary demonstration plant. Final report  

DOE Green Energy (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

448

An investigation of wind loads on solar collectors. Appendix I - data listing for top and bottom of collector. Final report  

SciTech Connect

A wind-tunnel study of a series of model solar-collector installations (flat-plate collectors) immersed in a thick turbulent shear layout was undertaken in order to determine design wind loads on such installations. Wind tunnel measurements were made of the mean and fluctuating pressures on a model of a single flat-plate collector which was a component of different multi-panel installations. The pressures were spatially integrated over the top and bottom surface of the single collector separately.

Tieleman, H.W.; Akins, R.E.; Sparks, P.

1980-01-01T23:59:59.000Z

449

Unifying disc-jet behaviour in X-ray binaries: an optical/IR approach  

E-Print Network (OSTI)

Synchrotron emission from jets produced by X-ray binaries can be detected at optical and infrared (IR) frequencies. I show that optical/IR colour-magnitude diagrams of the outbursts of nine X-ray binaries successfully separate thermal disc emission from non-thermal jet emission, in both black hole and neutron star sources. A heated single-temperature blackbody is able to reproduce the observed relations between colour and magnitude, except when excursions are made to a redder colour than expected, which is due to jet emission. The general picture that is developed is then incorporated into the unified picture of disc-jet behaviour in black hole X-ray binaries. At a given position of a source in the X-ray hardness-intensity diagram, the radio, IR and optical properties can be inferred. Similarly, it is possible to predict the X-ray and radio luminosities and spectral states from optical/IR monitoring.

David M. Russell; Dipankar Maitra; Rob P. Fender; Fraser Lewis

2008-11-18T23:59:59.000Z

450

Physics of Outflows: the Binary Protostar L 1551 IRS 5 and its Jets  

E-Print Network (OSTI)

Recent observations of the deeply embedded L1551 IRS5 system permit the detailed examination of the properties of both the stellar binary and the binary jet. For the individual components of the stellar binary, we determine their masses, mass accretion rates, effective temperatures and luminosities. For the atomic wind/jet flow, we determine the mass loss rate, yielding observationally determined values of the ratio of the mass loss to the mass accretion rate, f. For the X-ray emitting region in the northern jet, we have obtained the jet-velocity and derive the extinction and the densities on different spatial scales. Examining the observational evidence within the framework of the x-wind theory leads us to conclude that these models are indeed potentially able to account for the observational data for this deeply embedded source.

Ren Liseau; C. V. Malcolm Fridlund; Bengt Larsson

2008-01-01T23:59:59.000Z

451

Effect of Ambient Design Temperature on Air-Cooled Binary Plant Output  

Science Conference Proceedings (OSTI)

Air-cooled binary plants are designed to provide a specified level of power production at a particular air temperature. Nominally this air temperature is the annual mean or average air temperature for the plant location. This study investigates the effect that changing the design air temperature has on power generation for an air-cooled binary plant producing power from a resource with a declining production fluid temperature and fluctuating ambient temperatures. This analysis was performed for plants operating both with and without a geothermal fluid outlet temperature limit. Aspen Plus process simulation software was used to develop optimal air-cooled binary plant designs for specific ambient temperatures as well as to rate the performance of the plant designs at off-design operating conditions. Results include calculation of annual and plant lifetime power generation as well as evaluation of plant operating characteristics, such as improved power generation capabilities during summer months when electric power prices are at peak levels.

Dan Wendt; Greg Mines

2011-10-01T23:59:59.000Z

452

Estimating parameters of coalescing compact binaries with a detector network including LIGO Australia  

E-Print Network (OSTI)

One of the goals of gravitational-wave astronomy is simultaneous detection of gravitational-wave signals from merging compact-object binaries and the electromagnetic transients from these mergers. With the next generation of advanced ground-based gravitational wave detectors under construction, we examine the benefits of the proposed extension of the detector network to include a fourth site in Australia in addition to the network of Hanford, Livingston and Cascina sites. Using Bayesian parameter-estimation analyses of simulated gravitational-wave signals from a range of coalescing-binary locations and orientations, we study the improvement in parameter estimation. We find that an Australian detector can break degeneracies in several parameters; in particular, the localization of the source on the sky is improved by a factor of ~4, with more modest improvements in distance and binary inclination estimates. This enhanced ability to localize sources on the sky will be crucial in any search for electromagnetic c...

Aylott, Benjamin; Kalogera, Vassiliki; Mandel, Ilya; Raymond, Vivien; Rodriguez, Carl; van der Sluys, Marc; Vecchio, Alberto; Veitch, John

2011-01-01T23:59:59.000Z

453

Anisotropic mass ejection from black hole-neutron star binaries: Diversity of electromagnetic counterparts  

E-Print Network (OSTI)

The merger of black hole-neutron star binaries can eject substantial material with the mass ~0.01-0.1M_sun when the neutron star is disrupted prior to the merger. The ejecta shows significant anisotropy, and travels in a particular direction with the bulk velocity ~0.2c. This is drastically different from the binary neutron star merger, for which ejecta is nearly isotropic. Anisotropic ejecta brings electromagnetic-counterpart diversity which is unique to black hole-neutron star binaries, such as viewing-angle dependence, polarization, and proper motion. The kick velocity of the black hole, gravitational-wave memory emission, and cosmic-ray acceleration are also discussed.

Koutarou Kyutoku; Kunihito Ioka; Masaru Shibata

2013-05-27T23:59:59.000Z

454

Black hole remnant of black hole-neutron star coalescing binaries with arbitrary black hole spin  

E-Print Network (OSTI)

A model for determining the dimensionless spin parameter and mass of the black hole remnant of black hole-neutron star mergers with arbitrary initial black hole spin angular momentum, binary mass ratio, and neutron star mass and cold equation of state is formulated. Tests against numerical-relativity results are carried out, showing that both the dimensionless spin parameter and the final mass are accurately reproduced. For the first time, the behaviour of both quantities and of the l = 2, m = 2, n = 0 quasinormal mode frequency is inspected throughout the parameter space. Predictions of this frequency may be exploited to guide gravitational wave modelling and detection efforts, and to extract physical information from detected gravitational wave signals that would help us break degeneracies between binary black hole and black hole-neutron star systems, improve our understanding of compact binary formation, and constrain the neutron star equation of state.

Francesco Pannarale

2013-11-22T23:59:59.000Z

455

Accretion Disks Around Binary Black Holes: A Simple GR-Hybrid Evolution Model  

E-Print Network (OSTI)

We consider a geometrically thin, Keplerian disk in the orbital plane of a binary black hole (BHBH) consisting of a spinning primary and low-mass secondary (mass ratio q important prior to binary-disk decoupling, when the orbital separation is large and resides in the weak-field regime. The tidal torque on the disk diminishes during late merger and vanishes altogether following merger. By contrast, the viscous torque drives the flow into the strong-field region and onto the primary during all epochs. Following binary coalescence, the viscous torque alone governs the time-dependent accretion onto the remnant, as well as the temporal behavior, strength and spectrum of the aftermath electromagnetic radiation from the disk. We solve our GR-hybrid equation for a representative BHBH-disk system, identify several observable EM signatures of the merger, and compare results obtained for the gas and EM radiation with those found with the Newtonian prescription.

Stuart L. Shapiro

2013-04-22T23:59:59.000Z

456

An improved analytical description of inspiralling and coalescing black-hole binaries  

E-Print Network (OSTI)

We present an analytical formalism, within the Effective-One-Body framework, which predicts gravitational-wave signals from inspiralling and coalescing black-hole binaries that agree, within numerical errors, with the results of the currently most accurate numerical relativity simulations for several different mass ratios. In the equal-mass case, the gravitational wave energy flux predicted by our formalism agrees, within numerical errors, with the most accurate numerical-relativity energy flux. We think that our formalism opens a realistic possibility of constructing a sufficiently accurate, large bank of gravitational wave templates, as needed both for detection and data analysis of (non spinning) coalescing binary black holes.

Thibault Damour; Alessandro Nagar

2009-02-02T23:59:59.000Z

457

Binary and ternary gas mixtures for use in glow discharge closing switches  

Science Conference Proceedings (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

458

Modelling the Delay Distribution of Binary Spray and Wait Routing Protocol  

E-Print Network (OSTI)

This article proposes a stochastic model to obtain the end-to-end delay law between two nodes of a Delay Tolerant Network (DTN). We focus on the commonly used Binary Spray and Wait (BSW) routing protocol and propose a model that can be applied to homogeneous or heterogeneous networks (i.e. when the inter-contact law parameter takes one or several values). To the best of our knowledge, this is the first model allowing to estimate the delay distribution of Binary Spray and Wait DTN protocol in heterogeneous networks. We first detail the model and propose a set of simulations to validate the theoretical results.

Diana, Rmi

2011-01-01T23:59:59.000Z

459

Resistances for heat and mass transfer through a liquid-vapor interface in a binary mixture  

E-Print Network (OSTI)

In this paper we calculate the interfacial resistances to heat and mass transfer through a liquid-vapor interface in a binary mixture. We use two methods, the direct calculation from the actual non-equilibrium solution and integral relations, derived earlier. We verify, that integral relations, being a relatively faster and cheaper method, indeed gives the same results as the direct processing of a non-equilibrium solution. Furthermore we compare the absolute values of the interfacial resistances with the ones obtained from kinetic theory. Matching the diagonal resistances for the binary mixture we find that kinetic theory underestimates the cross coefficients. The heat of transfer is as a consequence correspondingly larger.

Kirill Glavatskiy; Dick Bedeaux

2010-08-20T23:59:59.000Z

460

Resistances for heat and mass transfer through a liquid-vapor interface in a binary mixture  

E-Print Network (OSTI)

In this paper we calculate the interfacial resistances to heat and mass transfer through a liquid-vapor interface in a binary mixture. We use two methods, the direct calculation from the actual non-equilibrium solution and integral relations, derived earlier. We verify, that integral relations, being a relatively faster and cheaper method, indeed gives the same results as the direct processing of a non-equilibrium solution. Furthermore we compare the absolute values of the interfacial resistances with the ones obtained from kinetic theory. Matching the diagonal resistances for the binary mixture we find that kinetic theory underestimates the cross coefficients. The heat of transfer is as a consequence correspondingly larger.

Glavatskiy, Kirill

2010-01-01T23:59:59.000Z

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461

CHARACTERIZING THE GALACTIC WHITE DWARF BINARY POPULATION WITH SPARSELY SAMPLED RADIAL VELOCITY DATA  

Science Conference Proceedings (OSTI)

We present a method to characterize statistically the parameters of a detached binary sample-binary fraction, separation distribution, and mass-ratio distribution-using noisy radial velocity data with as few as two, randomly spaced, epochs per object. To do this, we analyze the distribution of {Delta}RV{sub max}, the maximum radial velocity difference between any two epochs for the same object. At low values, the core of this distribution is dominated by measurement errors, but for large enough samples there is a high-velocity tail that can effectively constrain the parameters of the binary population. We discuss our approach for the case of a population of detached white dwarf (WD) binaries with separations that are decaying via gravitational wave emission. We derive analytic expressions for the present-day distribution of separations, integrated over the star formation history of the Galaxy, for parameterized initial WD separation distributions at the end of the common-envelope phase. We use Monte Carlo techniques to produce grids of simulated {Delta}RV{sub max} distributions with specific binary population parameters, and the same sampling cadences and radial velocity errors as the observations, and we compare them to the real {Delta}RV{sub max} distribution to constrain the properties of the binary population. We illustrate the sensitivity of the method to both the model and observational parameters. In the particular case of binary WDs, every model population predicts a merger rate per star which can easily be compared to specific Type Ia supernova rates. In a companion paper, we apply the method to a sample of {approx}4000 WDs from the Sloan Digital Sky Survey. The binary fractions and separation distribution parameters allowed by the data indicate a rate of WD-WD mergers per unit stellar mass in the Galactic disk, {approx}1 Multiplication-Sign 10{sup -13} mergers yr{sup -1} M{sup -1}{sub Sun }, remarkably similar to the rate per unit mass of Type Ia supernovae in Milky Way like galaxies.

Maoz, Dan; Badenes, Carles [School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Bickerton, Steven J., E-mail: maoz@astro.tau.ac.il, E-mail: badenes@pitt.edu, E-mail: bick@astro.princeton.edu [Department of Astrophysical Sciences, Princeton University, Peyton Hall, Ivy Lane, Princeton, NJ 08544-1001 (United States)

2012-06-01T23:59:59.000Z

462

Study of Fault Diagnosis Model of Oil-Immersed Transformer Based on SVM Binary Tree with Combinatorial FKCM  

Science Conference Proceedings (OSTI)

This paper presents an improved binary tree algorithm for the compactness characteristics of the data sets of oil-immersed transformer in the pattern feature space. In order to improve the classification accuracy, the conception of combination is introduced ... Keywords: improved binary tree algorithm, Fuzzy means kernel clustering, SVM classifier

Liu Donghui; Sun Xiaoyun; Bian Jianpeng; Fu Ping

2009-11-01T23:59:59.000Z

463

Momentum Profile and Final Correlation Effects of Iso-butane Inner Valence by Binary (e, 2e) Spectroscopy  

E-Print Network (OSTI)

Momentum Profile and Final Correlation Effects of Iso-butane Inner Valence by Binary (e, 2e Momentum Profile and Final Correlation Effects of Iso-butane Inner Valence by Binary (e, 2e) Spectroscopy) The binding energy spectra and the momentum distributions of the valence orbitals of iso-butane, also known

Wang, Yayu

464

Proof-of-concept tests of the magnetohydrodynamic steam-bottoming system at the DOE Coal-Fired Flow Facility. Final report  

DOE Green Energy (OSTI)

The development of coal-fired magnetohydrodynamic (MHD) power can be viewed as consisting of two parts; the topping cycle and the bottoming cycle. The topping cycle consists of the coal combustor, MHD generator and associated components. The bottoming cycle consists of the heat recovery, steam generation, seed recovery/regeneration, emissions control (gas and particulate), ash handling and deposition, and materials evaluation. The report concentrates on the bottoming cycle, for which much of the technology was developed at the University of Tennessee Space Institute (UTSI). Because of the complexity of the required technology, a number of issues required investigation. Of specific concern regarding the bottoming cycle, was the design of the steam cycle components and emissions control. First, the high combustion temperatures and the use of large quantities of potassium in the MHD combustor results in a difference in the composition of the gases entering the bottoming cycle compared to conventional systems. Secondly, a major goal of the UTSI effort was to use a variety of coals in the MHD system, especially the large reserves of high-sulfur coals available in the United States.

Attig, R.C. [ed.

1996-10-09T23:59:59.000Z

465

T-561: IBM and Oracle Java Binary Floating-Point Number Conversion Denial  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

466

Modeling and optimization of geothermal power plants using the binary fluid cycle  

SciTech Connect

A computer simulation of a binary fluid cycle power plant for use with geothermal energy sources, and the subsequent optimization of this power plant type over a range of geothermal source conditions are described. The optimization technique employed for this analysis was based upon the principle of maximum use of geothermal energy.

Walter, R.A.

1976-09-01T23:59:59.000Z

467

Beam Test of a Large Area nonn Silicon Strip Detector with Fast Binary Readout Electronics  

E-Print Network (OSTI)

Beam Test of a Large Area n­on­n Silicon Strip Detector with Fast Binary Readout Electronics Y test was carried out for the non­irradiated and the irradiated detector modules. Efficiency, noise occupancy and performance in the edge regions were analyzed using the beam test data. High efficiency

468

Beam Test of a Large Area nonn Silicon Strip Detector with Fast Binary Readout Electronics  

E-Print Network (OSTI)

Beam Test of a Large Area n­on­n Silicon Strip Detector with Fast Binary Readout Electronics Y modules was irradiated with protons to a fluence of 1.2 ? 10 14 p/cm 2 . A beam test was carried out in the edge regions were analyzed using the beam test data. High efficiency both for the non

469

Gravity inversion using a binary formulation Richard A. Krahenbuhl* and Yaoguo Li  

E-Print Network (OSTI)

Gravity inversion using a binary formulation Richard A. Krahenbuhl* and Yaoguo Li Gravity contrast that gives rise to zero gravity response on the surface. As a result, part of the salt structure structure using gravity d