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Note: This page contains sample records for the topic "gain coefficient cxs" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

Solar Heat Gain Coefficient Worksheet WS-3R Residential (Page 1 of 2)  

E-Print Network (OSTI)

Solar Heat Gain Coefficient Worksheet WS-3R Residential (Page 1 of 2) Site Address: Enforcement Table for Fenestration Products (Table 116-B of the Standards), NFRC certified data, or Solar Heat Gain SHGCmin Total SHGC Note: Calculated Solar Heat Gain Coefficient values for Total SHGC may be used directly

2

ASHRAE Transactions 103(1) (1997). Solar Heat Gain Coefficient of Complex Fenestrations  

E-Print Network (OSTI)

LBNL-39248 DA-359 ASHRAE Transactions 103(1) (1997). Solar Heat Gain Coefficient of Complex, the most recent edition of the ASHRAE Handbook lists a table characterizing a venetian blind with a single shading coefficient number (ASHRAE 1993) for 0º azimuth and 35º incident angle, (the latter corresponding

3

Solar heat gain coefficient of complex fenestrations with a venetian blind for differing slat tilt angles  

DOE Green Energy (OSTI)

Measured bidirectional transmittances and reflectances of a buff-colored venetian blind together with a layer calculation scheme developed in previous publications are utilized to produce directional-hemispherical properties for the venetian blind layer and solar heat gain coefficients for the blind in combination with clear double glazing. Results are presented for three blind slat tilt angles and for the blind mounted either interior to the double glazing or between the glass panes. Implications of the results for solar heat gain calculations are discussed in the context of sun positions for St. Louis, MO.

Klems, J.H.; Warner, J.L.

1996-08-01T23:59:59.000Z

4

Benefits of the International Residential Code's Maximum Solar heat Gain Coefficient Requirement for Windows  

E-Print Network (OSTI)

Texas adopted in its residential building energy code a maximum 0.40 solar heat gain coefficient (SHGC) for fenestration (e.g., windows, glazed doors and skylights)-a critical driver of cooling energy use, comfort and peak demand. An analysis of the expected costs and benefits of low solar heat gain glazing, and specifically the SHGC requirement in the new Texas Residential Building Energy Code,1 shows that the 0.40 SHGC requirement is ideal for Texas and that the benefits far outweigh the expected costs. For consumers, the requirement will increase comfort and reduce their cost of home ownership. The anticipated public benefits are also substantial - the result of full implementation can be expected to: 1) Reduce cumulative statewide cooling energy use over ten years by 15 billion kWh; 2) Reduce cumulative statewide electric peak demand over ten years by over 1200 MW; 3) Result in cooling cost savings of more than a billion dollars; and 4) Reduce cumulative statewide key air pollutants.

Stone, G. A.; DeVito, E. M.; Nease, N. H.

2002-01-01T23:59:59.000Z

5

Measurement of the solar heat gain coefficient and U value of windows with insect screens  

SciTech Connect

Energy ratings are currently being used in a number of countries to assist in the selection of windows and doors based on energy performance. Developed for simple comparison purposes, these rating numbers do not take into account window removable attachments such as insect screens that are, nevertheless, widely used. Research was carried out to assess the effect of insect screens on the heat gains and losses of windows. The work reported in this paper deals with the effect of one screen type on the performance of a base-case, double-glazed window. Using an indoor solar simulator facility, measurements of the window solar heat gain coefficient (SHGC) and U value were made for different screen attachment configurations and climatic conditions. Results with the sample window tested indicate that insect screens placed on the outdoor side can reduce its SHGC by 46% with only a 7% reduction in its U value (0.19 W/m{sup 2}{center_dot}C), and that insect screens placed on the indoor side can reduce its SHGC by 15% while reducing its U value by 14% (0.38 W/m{sup 2}{center_dot}C).

Brunger, A.; Dubrous, F.M.; Harrison, S.

1999-07-01T23:59:59.000Z

6

SER Temperature Coefficient  

SciTech Connect

Experimentally determine the overall isothermal temperature coefficient of the SER up to the design operating temperatures.

Johnson, J.L.

1959-12-31T23:59:59.000Z

7

Gain Sharing.PDF  

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

SE SE DOE/IG-480 I N S P E C T I O N R E P O R T U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF INSPECTIONS INSPECTION OF GAIN SHARING OPPORTUNITIES FOR THE DEPARTMENT OF ENERGY SEPTEMBER 2000 U.S. DEPARTMENT OF ENERGY Washington, DC 20585 September 1, 2000 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman /s/ for Herbert Richardson Inspector General SUBJECT: INFORMATION: Report on "Inspection of Gain Sharing Opportunities for the Department of Energy" BACKGROUND In 1995, the General Services Administration provided guidance on a program known as "GAIN SHARING" where agencies could give cash awards to employees who participate in programs to save travel dollars. This guidance discussed the authority to offer cash awards to employees for obtaining a free coach class ticket with Frequent Flyer benefits earned on official travel and for

8

Linda L. Gaines resume  

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

L. Gaines L. Gaines Systems Analyst Center for Transportation Research Energy Systems Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 362 Argonne, IL 60439 phone: 630/252-4919 e-mail: lgaines@anl.gov Professional Experience * Lead analyst for U.S. Department of Energy's heavy vehicle idling studies. * Study costs and impacts on energy use and environment of production and recycling of advanced- design automobiles, trucks, trains, and batteries. * Primary interest is problem solving, which has been applied to efficient use of resources. * Since joining Argonne in 1976, have written handbooks of energy and material flows in petroleum refining, organic chemicals, and copper industries that provided background for reports and papers on technical and institutional issues involved in recycling discarded tires, packaging,

9

Survey Research on gain scheduling  

Science Conference Proceedings (OSTI)

Current research on gain scheduling is clarifying customary practices as well as devising new approaches and methods for the design of nonlinear control systems. Keywords: Gain scheduling, Linear parameter-varying systems, Nonlinear control systems

Wilson J. Rugh; Jeff S. Shamma

2000-10-01T23:59:59.000Z

10

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: SUMMARY OF PROCEDURES FOR  

E-Print Network (OSTI)

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: SUMMARY OF PROCEDURES that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about

11

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING  

E-Print Network (OSTI)

SOLAR HEAT GAIN THROUGH FENESTRATION SYSTEMS CONTAINING SHADING: PROCEDURES FOR ESTIMATING that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about

12

Photomultiplier tube gain regulating system  

DOE Patents (OSTI)

This invention relates to an improved system for regulating the gain of a photomultiplier tube, and was designed for use with the photomultiplier tubes of a GeMSAEC fast analyzers. It has the following advantages over the prior system: noise is virtually eliminated; sample analysis can begin after 3 to 4 revolutions of the rotor; fluorescent and light scattering solutions can be used as a reference; and the reference solution can be in any cuvette on the rotor.

Johnson, Wayne F. (Loudon, TN)

1976-01-01T23:59:59.000Z

13

Effect of the nonlinear saturation of the gain on the peak modulation frequency in lasers based on self-assembled quantum dots  

SciTech Connect

Peak modulation frequency of lasers based on self-organized quantum dots is calculated taking into account the effect of nonlinear gain saturation. Because of a large nonlinear gain coefficient and a reduction in the differential gain with increasing optical losses, the peak modulation frequency is attained for an optimum loss level that is significantly lower than the saturated optical gain in the active region. For lasers based on multiply stacked arrays of quantum dots, the peak modulation frequency first increases with increasing number of quantum-dot layers before leveling off, with the limiting value being inversely proportional to the nonlinear gain coefficient.

Zhukov, A. E., E-mail: zhukov@beam.ioffe.ru; Arakcheeva, E. M. [Russian Academy of Sciences, St. Petersburg Academic University, Nanotechnology Research and Education Center (Russian Federation); Gordeev, N. Yu. [Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation); Zubov, F. I.; Kryzhanovskaya, N. V. [Russian Academy of Sciences, St. Petersburg Academic University, Nanotechnology Research and Education Center (Russian Federation); Maximov, M. V. [Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation); Savelyev, A. V. [Russian Academy of Sciences, St. Petersburg Academic University, Nanotechnology Research and Education Center (Russian Federation)

2011-07-15T23:59:59.000Z

14

Conversion coefficients for superheavy elements  

E-Print Network (OSTI)

In this paper we report on internal conversion coefficients for Z = 111 to Z = 126 superheavy elements obtained from relativistic Dirac-Fock (DF) calculations. The effect of the atomic vacancy created during the conversion process has been taken into account using the so called "Frozen Orbital" approximation. The selection of this atomic model is supported by our recent comparison of experimental and theoretical conversion coefficients across a wide range of nuclei. The atomic masses, valence shell electron configurations, and theoretical atomic binding energies required for the calculations were adopted from a critical evaluation of the published data. The new conversion coefficient data tables presented here cover all atomic shells, transition energies from 1 keV up to 6000 keV, and multipole orders of 1 to 5. A similar approach was used in our previous calculations [1] for Z = 5 - 110.

T. Kibdi; M. B. Trzhaskovskaya; M. Gupta; A. E. Stuchbery

2011-03-03T23:59:59.000Z

15

Optimization Online - Lot sizing with inventory gains  

E-Print Network (OSTI)

Apr 27, 2006 ... Abstract: This paper introduces the single item lot sizing problem with inventory gains. This problem is a generalization of the classical single...

16

Students gain work experience at WIPP  

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

Students Gain Work Experience at WIPP Students Gain Work Experience at WIPP CARLSBAD, N.M., January 10, 2000 -- Students from two Eddy County high schools are gaining valuable experience by spending time with employees of the Westinghouse Waste Isolation Division and Day & Zimmermann, LLC at the Waste Isolation Pilot Plant (WIPP). Six students from Carlsbad High School and four students from Loving High School are participating in the 1999-2000 WIPP Shadow Program. A "shadow" is a student who teams up with an employee to gain hands-on experience in the workplace. This activity helps the students identify career options and develop confidence. Each student spends three days during the school year with a volunteer mentor at the work location. "This program offers our employees the opportunity to share their knowledge and

17

Transport Coefficients of Gluon Plasma  

E-Print Network (OSTI)

Transport coefficients of gluon plasma are calculated for a SU(3) pure gauge model by lattice QCD simulations on $16^3 \\times 8$ and $24^3 \\times 8$ lattices. Simulations are carried out at a slightly above the deconfinement transition temperature $T_c$, where a new state of matter is currently being pursued in RHIC experiments. Our results show that the ratio of the shear viscosity to the entropy is less than one and the bulk viscosity is consistent with zero in the region, $1.4 \\leq T/T_c \\leq 1.8 $.

Atsushi Nakamura; Sunao Sakai

2004-06-08T23:59:59.000Z

18

Intrinsic gain modulation and adaptive neural coding  

E-Print Network (OSTI)

In many cases, the computation of a neural system can be reduced to a receptive field, or a set of linear filters, and a thresholding function, or gain curve, which determines the firing probability; this is known as a linear/nonlinear model. In some forms of sensory adaptation, these linear filters and gain curve adjust very rapidly to changes in the variance of a randomly varying driving input. An apparently similar but previously unrelated issue is the observation of gain control by background noise in cortical neurons: the slope of the firing rate vs current (f-I) curve changes with the variance of background random input. Here, we show a direct correspondence between these two observations by relating variance-dependent changes in the gain of f-I curves to characteristics of the changing empirical linear/nonlinear model obtained by sampling. In the case that the underlying system is fixed, we derive relationships relating the change of the gain with respect to both mean and variance with the receptive fi...

Hong, Sungho; Fairhall, Adrienne

2008-01-01T23:59:59.000Z

19

Radon emanation coefficients for phosphogysum  

Science Conference Proceedings (OSTI)

Phosphogypsum is a by-product of the phosphate fertilizer industry which is stockpiled in large quantities world-wide. Phosphogypsum consists mainly of dihydrate gypsum (CaSO{sub 4}2H{sub 2}O) but also contains elevated concentrations of {sup 226}Ra and other inorganic species which originate from the processing of phosphate rock. {sup 222}Rn gas is the first decay product of {sup 226}Ra and has been identified as one of the major environmental concerns associated with phosphogypsum. This study was conducted to determine effects of particle size, weathering, and moisture content on the {sup 222}Rn emanation coefficient ({epsilon}) for phosphogypsums. Practical conclusions from this study are discussed, such as the effects of a repository of a phosphogypsum site on radon emanation. 35 refs., 3 figs., 2 tabs.

Rutherford, P.M.; Dudas, M.J. [Univ. of Alberta, Edmonton (Canada); Arocena, J.M. [Univ. of Alberta, Edmonton (Canada)]|[Univ. of Northern British Columbia (Canada)

1995-10-01T23:59:59.000Z

20

GainSpan Corporation | Open Energy Information  

Open Energy Info (EERE)

GainSpan Corporation GainSpan Corporation Jump to: navigation, search Name GainSpan Corporation Address 121 Albright Way Place Los Gatos, California Zip 95032 Sector Efficiency Product Designs wireless sensor networks for a variety of applications including smart grid Website http://www.gainspan.com/ Coordinates 37.256998°, -121.964456° 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":37.256998,"lon":-121.964456,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Gaining creative control over semiconductor nanowires  

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

Gaining creative control over semiconductor nanowires Gaining creative control over semiconductor nanowires Gaining creative control over semiconductor nanowires Using a microfluidic reactor, Los Alamos researchers transformed the SLS process into a flow-based technique. September 26, 2013 Growth of nanowire precursors in a flowing carrier solvent Growth of nanowire precursors in a flowing carrier solvent The new "flow" solution-liquid-solid method allows scientists to slow down growth and thereby capture mechanistic details as the nanowires grow in solution. A Los Alamos research team has transformed the synthesis process of semiconductor nanowires for use in solar cells, batteries, electronics, sensors and photonics using a solution-liquid-solid (SLS) batch approach to achieve unprecedented control over growth rates, nanowire size and internal

22

Gaines Cavern Wind Project | Open Energy Information  

Open Energy Info (EERE)

Cavern Wind Project Cavern Wind Project Jump to: navigation, search Name Gaines Cavern Wind Project Facility Gaines Cavern Wind Project Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner General Compression Developer Texas Dispatchable Wind 1 LLC Location Gaines County TX Coordinates 32.688556°, -103.062464° 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":32.688556,"lon":-103.062464,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

23

Reducing gain shifts in photomultiplier tubes  

SciTech Connect

A means is provided for reducing gain shifts in multiplier tubes due to varying event count rates. It includes means for limiting the number of cascaded, active dynodes of the multiplier tube to a predetermined number with the last of predetermined number of dynodes being the output terminal of the tube. This output is applied to an amplifier to make up for the gain sacrificed by not totally utilizing all available active stages of the tube. Further reduction is obtained by illuminating the predetermined number of dynodes with a light source of such intensity that noise appearing at the output dynode associated with the illumination is negligible.

Cohn, Charles E. (Clarendon Hills, IL)

1976-01-01T23:59:59.000Z

24

Collaborative Gain in Resource Sharing Communication Networks  

E-Print Network (OSTI)

We consider a Multi-Hopping communication network of users transmitting information on a shared medium with limited resources, e.g., limited time and limited bandwidth. Users are able to transmit, receive, retrieve and reply information in a collaborative way. We assume that two users collaborate (one acts as a relay for another) only if, as a result of the collaboration, they gain more capacity, save on resources or save power. We perform optimal resource allocation for three problems: 1) maximizing the capacity given limited resource and energy, 2) minimizing the resource usage given capacity and energy and 3) minimizing energy usage given capacity and resources. By comparing the collaboration gain as a function of the channels and available energies, one may decide either to collaborate or not and select a collaborator among candidates. We find the conditions in which acting as relay results in capacity gain, resource or power saving. We show that a significant gain is attained only if the channel energy g...

Akhavan-Astaneh, Saeed

2007-01-01T23:59:59.000Z

25

PV ENERGY ROI Tracks Efficiency Gains  

E-Print Network (OSTI)

PV ENERGY ROI Tracks Efficiency Gains the state of PV today E nergy payback time (EPBT) is the time it takes for a photovoltaic (PV) system to produce all the energy used through- out its life cycle. A short EPBT corre- sponds to a high energy return on energy invest- ment

26

Gain International Work Experience in China  

E-Print Network (OSTI)

Gain International Work Experience in China www.StudyCLI.org "The CLI internship gave me a huge boost both personally and professionally. At 21 years old, I've lived in China and can speak basic city of Guilin, China. CLIinternsengageinadynamicrangeofprojects: Y Establishnewrelationshipswith

Virginia Tech

27

U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated...  

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

0: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges November 9, 2011 - 8:30am...

28

Gaines, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Gaines, Michigan: Energy Resources Gaines, Michigan: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 42.8725303°, -83.9141254° 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":42.8725303,"lon":-83.9141254,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

29

Multiuser Diversity Gain in Cognitive Networks  

E-Print Network (OSTI)

Dynamic allocation of resources to the \\emph{best} link in large multiuser networks offers considerable improvement in spectral efficiency. This gain, often referred to as \\emph{multiuser diversity gain}, can be cast as double-logarithmic growth of the network throughput with the number of users. In this paper we consider large cognitive networks granted concurrent spectrum access with license-holding users. The primary network affords to share its under-utilized spectrum bands with the secondary users. We assess the optimal multiuser diversity gain in the cognitive networks by quantifying how the sum-rate throughput of the network scales with the number of secondary users. For this purpose we look at the optimal pairing of spectrum bands and secondary users, which is supervised by a central entity fully aware of the instantaneous channel conditions, and show that the throughput of the cognitive network scales double-logarithmically with the number of secondary users ($N$) and linearly with the number of avai...

Tajer, Ali

2010-01-01T23:59:59.000Z

30

NIST: X-Ray Mass Attenuation Coefficients  

Science Conference Proceedings (OSTI)

... NIST reserves the right to charge for these data in the ... ?/? and the mass energy-absorption coefficient ... The tables cover energies of the photon (x-ray ...

2011-12-09T23:59:59.000Z

31

Improved estimation of exterior film coefficient  

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

Exterior convective coefficients were overestimated in the standard treatment (ASHRAE, DOE2) The result was an overestimate of savings potential for more efficient windows...

32

Potential Efficiency Gains, and Energy and Carbon Emission Savings ...  

U.S. Energy Information Administration (EIA)

Table 3. Potential Efficiency Gains, and Energy and Carbon Emission Savings, of Replacing Existing 1997 Appliances

33

Compensated gain control circuit for buck regulator command charge circuit  

DOE Patents (OSTI)

A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit.

Barrett, David M. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

34

Diffusion coefficient of trona in water  

SciTech Connect

Laboratory experiments were conducted to measure the diffusion coefficient of trona in water. The diffusion coefficient of trona from saturated solution in water was measured to be 1.167 *10/sup -5/ cm/sup 2//s with a standard devition of 6.2% at 25/degree/C.30 10/sup 9/ refs.

Mehta, G.D.; Jain, S.C.

1982-07-01T23:59:59.000Z

35

Wind-Stress Coefficients at Light Winds  

Science Conference Proceedings (OSTI)

The increase of the wind-stress coefficient with wind velocity was found to start with winds as light as 3 m s?1, below which, following the formula for aerodynamically smooth flows, the wind-stress coefficient decreases as the wind velocity ...

Jin Wu

1988-12-01T23:59:59.000Z

36

APPENDIX J Partition Coefficients For Uranium  

E-Print Network (OSTI)

APPENDIX J Partition Coefficients For Uranium #12;Appendix J Partition Coefficients For Uranium J.1.0 Background The review of uranium Kd values obtained for a number of soils, crushed rock and their effects on uranium adsorption on soils are discussed below. The solution pH was also used as the basis

37

Justification for change in AXAIR dispersion coefficients  

Science Conference Proceedings (OSTI)

AXAIR is the primary dose assessment code used at the Savannah River Site (SRS) to predict doses following hypothetical releases of relatively short durations. The atmospheric dispersion coefficients currently used in AXAIR are analytical expressions developed to fit the curves in the Turner Workbook as referred to in USNRC Regulatory Guide 1.145. This report explores the ramifications and benefits of changing the dispersion coefficients to a combination of Pasquill`s lateral dispersion coefficients and Briggs` vertical dispersion coefficients. The differences in the dispersion coefficients have a minor effect on the relative air concentrations for stability classes A--D, but a significant difference is seen for classes E, F, and G.

Simpkins, A.A.

1994-02-01T23:59:59.000Z

38

Risk Insights Gained from Fire Incidents  

SciTech Connect

There now exist close to 20 years of history in the application of Probabilistic Risk Assessment (PRA) for the analysis of fire risk at nuclear power plants. The current methods are based on various assumptions regarding fire phenomena, the impact of fire on equipment and operator response, and the overall progression of a fire event from initiation through final resolution. Over this same time period, a number of significant fire incidents have occurred at nuclear power plants around the world. Insights gained from US experience have been used in US studies as the statistical basis for establishing fire initiation frequencies both as a function of the plant area and the initiating fire source.To a lesser extent, the fire experience has also been used to assess the general severity and duration of fires. However, aside from these statistical analyses, the incidents have rarely been scrutinized in detail to verify the underlying assumptions of fire PRAs. This paper discusses an effort, under which a set of fire incidents are being reviewed in order to gain insights directly relevant to the methods, data, and assumptions that form the basis for current fire PRAs. The paper focuses on the objectives of the effort, the specific fire events being reviews methodology, and anticipated follow-on activities.

Kazarians, Mardy; Nowlen, Steven P.

1999-06-10T23:59:59.000Z

39

Financing Renewable Energy - No Pain, No Gain  

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

newresourcebank.com newresourcebank.com Financing Renewable Energy "No Pain, No Gain" New Resource Bank: A Radical Idea Our mission is to promote sustainable living in our community with everything we do. Where Does Your Money Spend The Night? 9/4/2012 2 Renewable Energy Projects Anaerobic Manure Digester This anaerobic manure digester improves manure management and sustainability for partner dairies while generating renewable electricity for sale to a local public utility. Anaerobic digestion is a natural process that converts a portion of the organic carbon in manure (and other waste streams) into methane and carbon dioxide. o Production of renewable energy (Biogas) o Carbon offsets o Reduction of greenhouse gas emissions o Potential pathogen reduction in manure

40

Symmetry energy coefficients for asymmetric nuclear matter  

E-Print Network (OSTI)

Symmetry energy coefficients of asymmetric nuclear matter are investigated as the inverse of nuclear matter polarizabilities with two different approaches. Firstly a general calculation shows they may depend on the neutron-proton asymmetry itself. The choice of particular prescriptions for the density fluctuations lead to certain isospin (n-p asymmetry) dependences of the polarizabilities. Secondly, with Skyrme type interactions, the static limit of the dynamical polarizability is investigated corresponding to the inverse symmetry energy coefficient which assumes different values at different asymmetries (and densities and temperatures). The symmetry energy coefficient (in the isovector channel) is found to increase as n-p asymmetries increase. The spin symmetry energy coefficient is also briefly investigated.

Fbio L. Braghin

2003-12-16T23:59:59.000Z

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


41

Determining Velocities and Mixing Coefficients from Tracers  

Science Conference Proceedings (OSTI)

The effort to determine oceanic velocities from tracer distributions relies on a knowledge of the effects of mixing. However, the macroscopic diffusion coefficient, K, is generally not known and must be calculated along with the velocity. The ...

Jae Hak Lee; George Veronis

1989-04-01T23:59:59.000Z

42

Calculated ngstrim's Turbidity Coefficients for Fairbanks, Alaska  

Science Conference Proceedings (OSTI)

ngstrim's turbidity coefficient, ?, was determined from measurements of direct normal solar irradiance (broadband) at Fairbanks, Alaska (latitude, 64.82). The frequency distribution and seasonal changes of derived values were similar to those ...

John D. Fox

1994-10-01T23:59:59.000Z

43

Financing Renewable Energy - No Pain, No Gain | Department of...  

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

Financing Renewable Energy - No Pain, No Gain Financing Renewable Energy - No Pain, No Gain U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE)...

44

Effects of internal gain assumptions in building energy calculations  

DOE Green Energy (OSTI)

The utilization of direct solar gains in buildings can be affected by operating profiles, such as schedules for internal gains, thermostat controls, and ventilation rates. Building energy analysis methods use various assumptions about these profiles. The effects of typical internal gain assumptions in energy calculations are described. Heating and cooling loads from simulations using the DOE 2.1 computer code are compared for various internal-gain inputs: typical hourly profiles, constant average profiles, and zero gain profiles. Prototype single-family-detached and multi-family-attached residential units are studied with various levels of insulation and infiltration. Small detached commercial buildings and attached zones in large commercial buildings are studied with various levels of internal gains. The results of this study indicate that calculations of annual heating and cooling loads are sensitive to internal gains, but in most cases are relatively insensitive to hourly variations in internal gains.

Christensen, C.; Perkins, R.

1981-01-01T23:59:59.000Z

45

New Baldrige Book Helps Organizations Gain 20/20 Foresight  

Science Conference Proceedings (OSTI)

New Baldrige Book Helps Organizations Gain 20/20 Foresight. From NIST Tech Beat: September 27, 2011. ...

2011-09-28T23:59:59.000Z

46

Solar Heat Gain Through Fenestration Systems Containing Shading: Procedures for Estimating Performance from Minimal Data  

Science Conference Proceedings (OSTI)

The computational methods for calculating the properties of glazing systems containing shading from the properties of their components have been developed, but the measurement standards and property data bases necessary to apply them have not. It is shown that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about the shading. Detailed formulas are presented, and performance multipliers are defined for the approximate treatment of simple glazings with shading. As higher accuracy is demanded, the formulas become very complicated.

Klems, J.H.

2000-08-01T23:59:59.000Z

47

Electric top drives gain wide industry acceptance  

Science Conference Proceedings (OSTI)

Since its introduction, the top drive drilling system has gained acceptance as a productive and safe method for drilling oil and gas wells. Originally, the system was used mostly for offshore and higher cost land drilling, and it had to be installed as a permanent installation because of its enormous weight and size. Essentially, a top drive replaces the kelly and rotary table as the means of rotating drillpipe on oil, gas and geothermal rigs and is considered to be 15% to 40% more efficient than a kelly drive. Top drive systems allow the operator to drill and maintain directional orientation for triple stands and provide tripping efficiency because of the ability to ream and circulate with triple stands, to reduce the risk of stuck pipe or lost wells, and to improve well control and pipe handling safety. The paper describes electric top drives with DC motors, top drives with AC motors, top drives with permanent magnet motors, and top drives with permanent magnet brushless synchronous motors.

Riahi, M.L.

1998-05-01T23:59:59.000Z

48

USDA Global Agricultural Information Network (GAIN) | Open Energy  

Open Energy Info (EERE)

USDA Global Agricultural Information Network (GAIN) USDA Global Agricultural Information Network (GAIN) Jump to: navigation, search Tool Summary Name: USDA Global Agricultural Information Network (GAIN) Agency/Company /Organization: United States Department of Agriculture Sector: Land Focus Area: Agriculture Topics: Co-benefits assessment, GHG inventory, Market analysis Resource Type: Dataset Website: gain.fas.usda.gov/Pages/Default.aspx USDA Global Agricultural Information Network (GAIN) Screenshot References: GAIN[1] Overview "USDA'S Global Agriculture Information Network (GAIN) provides timely information on the agricultural economy, products and issues in foreign countries since 1995 that are likely to have an impact on United States agricultural production and trade. U.S. Foreign Service officers working at

49

Determination of Longitudinal Dispersion Coefficient and Net  

E-Print Network (OSTI)

, New York, New York 10027 Physical processes such as advection, dispersion, and air-water gas exchange of the gas tracer, u is the average cross-sectional current velocity, Kx is the longitudinal dispersion in the Hudson River. Similar to the difference in longitudinal dispersion coefficients, the difference in gas

Ho, David

50

Differential coefficients of orthogonal matrix polynomials  

Science Conference Proceedings (OSTI)

We find explicit formulas for raising and lowering first order differential operators for orthogonal matrix polynomials. We derive recurrence relations for the coefficients in the raising and lowering operators. Some examples are given. Keywords: Annihilation operators, Creation operators, Orthogonal matrix polynomials, primary 33E30, secondary 42C05

Antonio J. Duran; Mourad E. H. Ismail

2006-06-01T23:59:59.000Z

51

Figure 61. Efficiency gains for selected commercial equipment ...  

U.S. Energy Information Administration (EIA)

Efficiency gains for selected commercial equipment in three cases, 2040 ... Refrigeration Electric water heating Ventilation Lighting $4.74 $4.35 ...

52

Marcellus natural gas production gains affect spreads between ...  

U.S. Energy Information Administration (EIA)

... issues, and trends. FAQs Glossary For ... Marcellus natural gas production gains affect spreads ... Supporting increased use of natural gas for power ...

53

Quenching of spontaneous emission coefficients in plasmas  

SciTech Connect

We have observed changing Einstein coefficients of spontaneous emission as a function of electron density in CO/sub 2/ laser-produced plasmas. These measurements are based on the intensity branching ratio of CIV lines 5801 to 5812 A and 312.41 to 312.46 A which share a common upper level. Similar observations for CIII lines are also discussed. 12 refs., 3 figs.

Chung, Y.; Lemaire, P.; Suckewer, S.

1987-09-01T23:59:59.000Z

54

GAINS: an interactive tool for assessing international GHG mitigation regimes  

Science Conference Proceedings (OSTI)

Mitigating greenhouse gases (GHGs) is key to reducing the longterm impacts of climate change. In this paper we present the GAINS system, i.e. a data warehouse with an online integrated assessment model that is already used in various international policy ... Keywords: GAINS, data warehouse

Thanh Binh Nguyen; Fabian Wagner; Wolfgang Schoepp

2011-08-01T23:59:59.000Z

55

Diversity and Educational Gains: a plan for a changing county and its schools  

E-Print Network (OSTI)

Brown School not included because it is K-12 Diversity andEducational Gains Diversity and Educational GainsTeachers College Press. Diversity and Educational Gains

Orfield, Gary; Frankenberg, Erica

2011-01-01T23:59:59.000Z

56

Building Energy Software Tools Directory: Window Heat Gain  

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

Window Heat Gain Window Heat Gain Window Heat Gain image Calculates the solar heat gain through vertical windows in temperate latitudes. Screen Shots Keywords Solar, window, energy Validation/Testing N/A Expertise Required None. Users Few (new program). Audience Architects, energy analysts. Input Location, window characteristics, ground characteristics. Output Daily/monthly heat gain through window. Computer Platform Web Programming Language JavaScript Strengths Allows default locations/windows/surfaces or custom user data. Incorporates lots of ASHRAE SHGF data that is otherwise burdensome to deal with. Weaknesses Only works for windows facing close to due north, south, east, or west. Doesn't address conductive losses or shading. Contact Company: Sustainable By Design Address: 3631 Bagley Avenue North

57

Gaines County Solid Waste Management Act (Texas) | Department of Energy  

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

Gaines County Solid Waste Management Act (Texas) Gaines County Solid Waste Management Act (Texas) Gaines County Solid Waste Management Act (Texas) < Back Eligibility Commercial Construction Industrial Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative Tribal Government Utility Program Info State Texas Program Type Environmental Regulations Provider Gaines County Solid Waste Management District This Act establishes the Gaines County Solid Waste Management District, a governmental body to develop and carry out a regional water quality protection program through solid waste management and regulation of waste disposal. The District has the power to prepare, adopt plans for, purchase, obtain permits for, construct, acquire, own, operate, maintain, repair, improve, and extend inside and outside the boundaries of the district any works,

58

Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS) | Open  

Open Energy Info (EERE)

Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS) Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS) Jump to: navigation, search Tool Summary Name: Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS) Agency/Company /Organization: International Institute for Applied Systems Analysis (IIASA) Sector: Energy, Land Topics: Co-benefits assessment, GHG inventory Resource Type: Software/modeling tools User Interface: Website Complexity/Ease of Use: Not Available Website: gains.iiasa.ac.at/index.php/home-page/241-on-line-access-to-gains Cost: Free UN Region: Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia

59

Transport coefficients of a massive pion gas  

E-Print Network (OSTI)

We review or main results concerning the transport coefficients of a light meson gas, in particular we focus on the case of a massive pion gas. Leading order results according to the chiral power-counting are presented for the DC electrical conductivity, thermal conductivity, shear viscosity, and bulk viscosity. We also comment on the possible correlation between the bulk viscosity and the trace anomaly in QCD, as well as the relation between unitarity and a minimum of the quotient $\\eta/s$ near the phase transition.

D. Fernandez-Fraile; A. Gomez Nicola

2009-12-20T23:59:59.000Z

60

Transmission eigenvalues for operators with constant coefficients  

E-Print Network (OSTI)

In this paper we study the interior transmission problem and transmission eigenvalues for multiplicative perturbations of linear partial differential operator of order $\\ge 2$ with constant real coefficients. Under suitable growth conditions on the symbol of the operator and the perturbation, we show the discreteness of the set of transmission eigenvalues and derive sufficient conditions on the existence of transmission eigenvalues. We apply these techniques to the case of the biharmonic operator and the Dirac system. In the hypoelliptic case we present a connection to scattering theory.

Michael Hitrik; Katsiaryna Krupchyk; Petri Ola; Lassi Pivrinta

2010-04-28T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Reactive sticking coefficients of silane on silicon  

SciTech Connect

Reactive sticking coefficients (RSCs) were measured for silane and disilane on polycrystalline silicon for a wide range of temperature and flux (pressure) conditions. The data were obtained from deposition rate measurements using molecular beam scattering and a very low pressure cold wall reactor. The RSCs have non-Arrhenius temperature dependences and decreases with increasing flux at low (710/sup 0/) temperatures. A simple model involving dissociative adsorption of silane is consistent with these results. The results are compared with previous studies of the SiH/sub 4//Si(s) reaction.

Buss, R.J.; Ho, P.; Breiland, W.G.; Coltrin, M.E.

1988-09-15T23:59:59.000Z

62

Bounds on Transport Coefficients of Porous Media  

DOE Green Energy (OSTI)

An analytical formulation of conductivity bounds by Bergman and Milton is used in a different way to obtain rigorous bounds on the real transport coefficients (electrical conductivity, thermal conductivity, and/or fluid permeability) of a fluid-saturated porous medium. These bounds do not depend explicitly on the porosity, but rather on two formation factors--one associated with the pore space and the other with the solid frame. Hashin-Shtrikman bounds for transport in random polycrystals of porous-material laminates will also be discussed.

Berryman, J G

2005-03-21T23:59:59.000Z

63

Achieving improved cycle efficiency via pressure gain combustors  

SciTech Connect

As part of the Department of Energy`s Advanced Gas Turbine Systems Program, an investigation is being performed to evaluate ``pressure gain`` combustion systems for gas turbine applications. This paper presents experimental pressure gain and pollutant emission data from such combustion systems. Numerical predictions for certain combustor geometries are also presented. It is reported that for suitable aerovalved pulse combustor geometries studied experimentally, an overall combustor pressure gain of nearly 1 percent can be achieved. It is also shown that for one combustion system operating under typical gas turbine conditions, NO{sub x} and CO emmissions, are about 30 ppmv and 8 ppmv, respectively.

Gemmen, R.S.; Janus, M.C.; Richards, G.A.; Norton, T.S. [USDOE Morgantown Energy Technology Center, WV (United States); Rogers, W.A. [EG& G Technical Services of West Virginia, Morgantown, WV (United States)

1995-04-01T23:59:59.000Z

64

Design of a high-gain flux-compression generator  

SciTech Connect

The current gain of a high-gain, high-explosive helical magnetic-flux-compression generator (HEG) is limited both by nonuniformities in stator expansion and by armature-stator misalignment. We set out to achieve three goals: first, an output current of at least 2 MA with a current gain greater than 1000 to drive a 150- to 300-nH load; second, a generator with an acceptably small volume and length; and finally, generator output of a reliable magnitude. 5 refs., 6 figs.

Pincosy, P.A.; Abe, D.K.; Chase, J.B. (Lawrence Livermore National Lab., CA (USA))

1989-09-01T23:59:59.000Z

65

Coefficient adaptive triangulation for strongly anisotropic problems  

Science Conference Proceedings (OSTI)

Second order elliptic partial differential equations arise in many important applications, including flow through porous media, heat conduction, the distribution of electrical or magnetic potential. The prototype is the Laplace problem, which in discrete form produces a coefficient matrix that is relatively easy to solve in a regular domain. However, the presence of anisotropy produces a matrix whose condition number is increased, making the resulting linear system more difficult to solve. In this work, we take the anisotropy into account in the discretization by mapping each anisotropic region into a ``stretched`` coordinate space in which the anisotropy is removed. The region is then uniformly triangulated, and the resulting triangulation mapped back to the original space. The effect is to generate long slender triangles that are oriented in the direction of ``preferred flow.`` Slender triangles are generally regarded as numerically undesirable since they tend to cause poor conditioning; however, our triangulation has the effect of producing effective isotropy, thus improving the condition number of the resulting coefficient matrix.

D`Azevedo, E.F.; Romine, C.H.; Donato, J.M.

1996-01-01T23:59:59.000Z

66

Shear Viscosity Coefficient from Microscopic Models  

E-Print Network (OSTI)

The transport coefficient of shear viscosity is studied for a hadron matter through microscopic transport model, the Ultra--relativistic Quantum Molecular Dynamics (UrQMD), using the Green--Kubo formulas. Molecular--dynamical simulations are performed for a system of light mesons in a box with periodic boundary conditions. Starting from an initial state composed of $\\pi, \\eta ,\\omega ,\\rho ,\\phi$ with a uniform phase--space distribution, the evolution takes place through elastic collisions, production and annihilation. The system approaches a stationary state of mesons and their resonances, which is characterized by common temperature. After equilibration, thermodynamic quantities such as the energy density, particle density, and pressure are calculated. From such an equilibrated state the shear viscosity coefficient is calculated from the fluctuations of stress tensor around equilibrium using Green--Kubo relations. We do our simulations here at zero net baryon density so that the equilibration times depend on the energy density. We do not include hadron strings as degrees of freedom so as to maintain detailed balance. Hence we do not get the saturation of temperature but this leads to longer equilibration times.

Azwinndini Muronga

2003-09-22T23:59:59.000Z

67

DOE Program Offers Participants Unique Opportunity to Gain Carbon Capture  

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

Program Offers Participants Unique Opportunity to Gain Carbon Program Offers Participants Unique Opportunity to Gain Carbon Capture and Storage Knowledge DOE Program Offers Participants Unique Opportunity to Gain Carbon Capture and Storage Knowledge February 8, 2011 - 12:00pm Addthis Washington, DC - Future leaders and innovators in the area of carbon capture and storage (CCS) can gain a unique and intensive tutorial on the subject by participating in the U.S. Department of Energy's (DOE) Research Experience in Carbon Sequestration (RECS) program. Supported by the Office of Fossil Energy (FE), the program for graduate students and early career professionals is currently accepting applications for RECS 2011, scheduled for June 5-15, in Birmingham, AL, and the deadline to apply is April 15. An intensive science-based program, RECS 2011 will combine classroom

68

U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated  

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

30: Apache Tomcat Lets Untrusted Web Applications Gain Elevated 30: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges November 9, 2011 - 8:30am Addthis PROBLEM: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges. PLATFORM: Apache Tomcat 7.0.0-7.0.21. ABSTRACT: An untrusted web application can access Manager application functions. reference LINKS: Apache Tomcat 7.x vulnerabilities SecurityTracker Alert ID: 1026295 CVE-2011-3376 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in Apache Tomcat. A local user (application) can obtain elevated privileges on the target system. A local web application (that is not trusted) can access Manager application functions without being marked as privileged. This can be exploited to obtain

69

Gain-assisted control of the Goos-Haenchen shift  

SciTech Connect

A gain-assisted model is considered to study the Goos-Haenchen (GH) shift behavior in the reflected and transmitted light. In this model, a probe light is incident on a cavity containing three-level dilute gaseous atomic medium. The atom-field interaction follows two-photon Raman transitions, and the dielectric susceptibility of the medium exhibits dispersion and gain properties [L. J. Wang, A. Kuzmich, and A. Dogariu, Nature (London) 406, 227 (2000)]. Under appropriate conditions, two gain peaks are observed with anomalous dispersion between the peaks, whereas normal dispersion can be observed at and around the gain maxima. The manipulation of the detuning associated with the probe light field which interacts with the intracavity medium during its propagation through the cavity can lead to a control over negative and positive GH shift in the reflected and transmitted light beam via the anomalous and normal dispersion of the medium.

Ziauddin,; Qamar, Sajid [Centre for Quantum Physics, COMSATS Institute of Information Technology, Islamabad (Pakistan); Department of Physics, COMSATS Institute of Information Technology, Islamabad (Pakistan)

2011-11-15T23:59:59.000Z

70

FEL GAIN LENGTH AND TAPER MEASUREMENTS AT LCLS  

E-Print Network (OSTI)

taper mea- surements from LCLS. We ?nd gain lengths of ? 2.9AND TAPER MEASUREMENTS AT LCLS ? D. Ratner , A. Brachmann,et al. , First Results of the LCLS Laser-Heater Sys- tem,

Ratner, D.

2010-01-01T23:59:59.000Z

71

Design of a variable gain amplifier for an ultrawideband receiver  

E-Print Network (OSTI)

A fully differential CMOS variable gain amplifier (VGA) has been designed for an ultra-wideband receiver. The VGA comprises of two variable gain stages followed by a post amplifier stage. The interface between the digital control block and the analog VGA is formed by a digital-to-analog converter and an exponential voltage generator. The gain of the VGA varies dB-linearly from 0 to 52 dB with respect to the control voltage. The VGA is operated in open loop with a bandwidth greater than 500 MHz throughout the gain range to cater to the requirements of the ultra-wideband system. The noise-to-power ratio of the VGA is -23.9 dB for 1Vp-p differential input signal in the low gain setting, and the equivalent input referred noise is 1.01 V2 for the high gain setting. All three stages use common mode feedback to fix and stabilize the output DC levels at a particular voltage depending on the input common-mode requirement of the following stage. DC offset cancellation has also been incorporated to minimize the input referred DC offset caused by systematic and random mismatches in the circuit. Compensation schemes to minimize the effects of temperature, supply and process variations have been included in the design. The circuit has been designed in 0.18??m CMOS technology, and the post layout simulations are in good agreement with the schematic simulations.

Krishnanji, Sivasankari

2005-08-01T23:59:59.000Z

72

Asymptotic normalization coefficients from ab initio calculations.  

Science Conference Proceedings (OSTI)

We present calculations of asymptotic normalization coefficients (ANCs) for one-nucleon removals from nuclear states of mass numbers 3 {le} A {le} 9. Our ANCs were computed from variational Monte Carlo solutions to the many-body Schroedinger equation with the combined Argonne v{sub 18} two-nucleon and Urbana IX three-nucleon potentials. Instead of computing explicit overlap integrals, we applied a Green function method that is insensitive to the difficulties of constructing and Monte Carlo sampling the long-range tails of the variational wave functions. This method also allows computation of the ANC at the physical separation energy, even when it differs from the separation energy for the Hamiltonian. We compare our results, which for most nuclei are the first ab initio calculations of ANCs, with existing experimental and theoretical results and discuss further possible applications of the technique.

Nollett, K. M.; Wiringa, R. B. (Physics)

2011-04-13T23:59:59.000Z

73

New crop coefficients developed for high-yield processing tomatoes  

E-Print Network (OSTI)

after planting Fig. 2. Daily crop coefficients with daysFor all years, seasonal crop ETc ranged from 20.8 to 29.64. Relationship between average crop coefficient and canopy

Hanson, Blaine R.; May, Donald M.

2006-01-01T23:59:59.000Z

74

A new numerical method for conversion of sonic second virial coefficients to density second virial coefficients  

E-Print Network (OSTI)

A new numerical method has been developed for calculation of density second virial coefficients, B(T), from sonic velocity measurements in gases at low pressures. Unlike existing methods, this procedure requires no model assumption as to the form of the temperature variation of B(T). Rather it gathers additional information by differencing the measured acoustic second virial coefficient in accordance with a new mathematical approximation. While two higher-ordered terms in the complete identity must be ignored to initiate the numerical calculations, the magnitude of these terms can later be estimated from the initial determination of B(T). By such an iterative procedure, the method can be made exact or, from a second viewpoint, the initial estimate allows calculation of the errors in the method itself. The new method is simple and easy to use as it employs only standard numerical techniques. It requires a digital computer program; although limited calculations can be made on a modern hand-held calculator. The objectives of this research are (1) to prove that our method is more accurate than existing methods for extracting second density virial coefficients from sonic velocity data, (2) to illustrate that the new numerical method is much simpler in convening sonic velocity data to second density virial coefficients and finally (3) to show that with the new method, no model assumptions for the temperature profile need to be made to get accurate results.

Mossaad, Ehab

1999-01-01T23:59:59.000Z

75

A Study of the Irradiation-Temperature Coefficient for Alanine ...  

Science Conference Proceedings (OSTI)

A Study of the Irradiation-Temperature Coefficient for Alanine Film and Pellet Dosimeters at Elevated Temperature. ...

2013-03-01T23:59:59.000Z

76

A new method for predicting the solar heat gain of complex fenestration systems  

DOE Green Energy (OSTI)

A new method of predicting the solar heat gain through complex fenestration systems involving nonspecular layers such as shades or blinds has been examined in a project jointly sponsored by ASHRAE and DOE. In this method, a scanning radiometer is used to measure the bidirectional radiative transmittance and reflectance of each layer of a fenestration system. The properties of systems containing these layers are then built up computationally from the measured layer properties using a transmission/multiple-reflection calculation. The calculation produces the total directional-hemispherical transmittance of the fenestration system and the layer-by-layer absorbances. These properties are in turn combined with layer-specific measurements of the inward-flowing fractions of absorbed solar energy to produce the overall solar heat gain coefficient. The method has been applied to one of the most optically complex systems in common use, a venetian blind in combination with multiple glazings. A comparison between the scanner-based calculation method and direct system calorimetric measurements made on the LBL MoWiTT facility showed good agreement, and is a significant validation of the method accuracy and feasibility.

Klems, J.H.; Warner, J.L.; Kelley, G.O.

1995-03-01T23:59:59.000Z

77

Light-scattering properties of a woven shade-screen material used for daylighting and solar heat-gain control  

Science Conference Proceedings (OSTI)

Shade-screens are widely used in commercial buildings as a way to limit the amount of direct sunlight that can disturb people in the building. The shade screens also reduce the solar heat-gain through glazing the system. Modern energy and daylighting analysis software such as EnergyPlus and Radiance require complete scattering properties of the scattering materials in the system. In this paper a shade screen used in the LBNL daylighting testbed is characterized using a photogoniometer and a normal angle of incidence integrating sphere. The data is used to create a complete bi-directional scattering distribution function (BSDF) that can be used in simulation programs. The resulting BSDF is compared to a model BADFs, both directly and by calculating the solar heat-gain coefficient for a dual pane system using Window 6.

Jonsson, Jacob; Jonsson, Jacob C.; Lee, Eleanor S.; Rubin, Mike

2008-08-01T23:59:59.000Z

78

Solar heat gain through fenestration systems containing shading: Summary of procedures for estimating performance from minimal data  

SciTech Connect

The computational methods for calculating the properties of glazing systems containing shading from the properties of their components have been developed, but the measurement standards and property data bases necessary to apply them have not. It is shown that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about the shading. Detailed formulas are presented, and performance multipliers are defined for the approximate treatment of simple glazings with shading. As higher accuracy is demanded, the formulas become very complicated.

Klems, Joseph H.

2001-03-01T23:59:59.000Z

79

Two Savannah River Site Projects Gain National Recognition | Department of  

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

Savannah River Site Projects Gain National Recognition Savannah River Site Projects Gain National Recognition Two Savannah River Site Projects Gain National Recognition June 21, 2011 - 12:00pm Addthis Media Contacts Jim Giusti, DOE (803) 952-7697 james-r.giusti@srs.gov Will Callicott, SRNL (803) 725-3786 will.callicott@srs.gov AIKEN, SC - The Department of Energy's Savannah River Site has received Environmental Sustainability (EStar) awards from DOE for two projects growing out of technology research, development and application at the Savannah River National Laboratory. EStar awards recognize excellence in pollution prevention and sustainable environmental stewardship. They are awarded for projects and programs that reduce environmental impacts, enhance site operations, and reduce costs. One award, for Renewable Technology Development, Deployment and Education

80

Internships Help Future Energy Leaders Gain Hands-On Experience |  

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

Internships Help Future Energy Leaders Gain Hands-On Experience Internships Help Future Energy Leaders Gain Hands-On Experience Internships Help Future Energy Leaders Gain Hands-On Experience August 23, 2013 - 10:19am Addthis EM Office of External Affairs Acting Communications Director Dave Borak talks with EM intern Valerie Edwards. | Photo courtesy of the Energy Department. EM Office of External Affairs Acting Communications Director Dave Borak talks with EM intern Valerie Edwards. | Photo courtesy of the Energy Department. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs More Back-To-School Stories: Learn how the Energy Department's Energy 101 Course Framework is helping colleges and universities offer energy-related classes. Interested in working at the National Labs? There's an internship

Note: This page contains sample records for the topic "gain coefficient cxs" 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

NREL: Energy Systems Integration - ESIF Gaining National and International  

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

ESIF Gaining National and International Interest ESIF Gaining National and International Interest An aerial photo of the NREL Golden campus with arrows pointing to the ESIF building. The Energy Systems Integration Facility on the NREL campus in Golden, Colorado. Aerial photo taken 6/2012 by Sincere/Duncan Studios courtesy of JE Dunn Construction. As the October 2012 substantial completion of NREL's new Energy Systems Integration Facility approaches, interest in the facility is gaining momentum. Universities such as Stanford and MIT, as well as corporations such as Ingersoll-Rand and IBM, have already gotten a first look at the facility during its construction. In addition, international organizations such as E-Energy (Germany), Suzlon (India), and NEDO (Japan) are considering how they can partner with NREL to test renewable technologies

82

NREL: Continuum Magazine - Electric Vehicle Battery Development Gains  

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

Electric Vehicle Battery Development Gains Momentum Electric Vehicle Battery Development Gains Momentum Issue 5 Print Version Share this resource Electric Vehicle Battery Development Gains Momentum CAEBAT collaboration targets EDV batteries with longer range and lifespan, at a lower cost. A photo of two men silhouetted in front of six back-lit display screens showing battery models, located in a dark room (22008). Enlarge image NREL's modeling, simulation, and testing activities include battery safety assessment, next-generation battery technologies, material synthesis and research, subsystem analysis, and battery second use studies. Photo by Dennis Schroeder, NREL "When people get behind the wheel of an electric car, it should be a great driving experience. Period." Dr. Taeyoung Han, GM technical fellow, said,

83

Two Savannah River Site Projects Gain National Recognition | Department of  

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

Two Savannah River Site Projects Gain National Recognition Two Savannah River Site Projects Gain National Recognition Two Savannah River Site Projects Gain National Recognition June 21, 2011 - 12:00pm Addthis Media Contacts Jim Giusti, DOE (803) 952-7697 james-r.giusti@srs.gov Will Callicott, SRNL (803) 725-3786 will.callicott@srs.gov AIKEN, SC - The Department of Energy's Savannah River Site has received Environmental Sustainability (EStar) awards from DOE for two projects growing out of technology research, development and application at the Savannah River National Laboratory. EStar awards recognize excellence in pollution prevention and sustainable environmental stewardship. They are awarded for projects and programs that reduce environmental impacts, enhance site operations, and reduce costs. One award, for Renewable Technology Development, Deployment and Education

84

Additional solar/load ratio correlations for direct gain buildings  

DOE Green Energy (OSTI)

Solar/load ratio (SLR) correlations have been developed for two new reference direct gain designs. The new reference designs are identical to the originals except that the glazing air gap has been increased from 1/4 in. to 1/2 in. and a vector average of the local hourly windspeed was used in the thermal network calculations rather than an assumed average value of 15 m.p.h. Both of these modifications are realistic and enhance the predicted performance of direct gain buildings. A comprehensive set of mass sensitivity calculations has been performed in order to provide information needed to select an appropriate set of parameters for new lightweight direct gain designs for which additional SLR correlations will be developed. Representative results are reported.

Wray, W.O.

1980-01-01T23:59:59.000Z

85

Reactive sticking coefficients of silane on silicon  

SciTech Connect

We have investigated the reaction of room-temperature silane and disilane on a hot polycrystalline silicon surface using both a collision-free molecular beam and a very low pressure CVD cell. Reactive sticking coefficients were obtained from deposition rate data over a wide range of temperatures and silane (disilane) fluxes. The RSCs are substantially less than one, ranging from 6 x 10/sup -5/ to 4 x 10/sup -2/. For silane we observed curved Arrhenius plots with slopes decreasing from approx.60 kcal mol/sup -1/ at low temperatures to approx.2 kcal mol/sup -1/ at higher temperatures. The RSCs are independent of flux (pressure) at 1040/sup 0/C, but vary as flux to the approx.-1/2 power at 710/sup 0/C. A model comprised of a dissociative adsorption mechanism with competing associative desorption and reaction was found to give reasonable agreement. For disilane, we observed RSCs that were roughly ten times higher than those for silane. We also observed a curved Arrhenius plot and a flux dependence at 710/sup 0/C for disilane. 22 refs., 5 figs.

Buss, R.J.; Ho, P.; Breiland, W.G.; Coltrin, M.E.

1987-01-01T23:59:59.000Z

86

Use of SCALE Continuous-Energy Monte Carlo Tools for Eigenvalue Sensitivity Coefficient Calculations  

Science Conference Proceedings (OSTI)

The TSUNAMI code within the SCALE code system makes use of eigenvalue sensitivity coefficients for an extensive number of criticality safety applications, such as quantifying the data-induced uncertainty in the eigenvalue of critical systems, assessing the neutronic similarity between different critical systems, and guiding nuclear data adjustment studies. The need to model geometrically complex systems with improved fidelity and the desire to extend TSUNAMI analysis to advanced applications has motivated the development of a methodology for calculating sensitivity coefficients in continuous-energy (CE) Monte Carlo applications. The CLUTCH and Iterated Fission Probability (IFP) eigenvalue sensitivity methods were recently implemented in the CE KENO framework to generate the capability for TSUNAMI-3D to perform eigenvalue sensitivity calculations in continuous-energy applications. This work explores the improvements in accuracy that can be gained in eigenvalue and eigenvalue sensitivity calculations through the use of the SCALE CE KENO and CE TSUNAMI continuous-energy Monte Carlo tools as compared to multigroup tools. The CE KENO and CE TSUNAMI tools were used to analyze two difficult models of critical benchmarks, and produced eigenvalue and eigenvalue sensitivity coefficient results that showed a marked improvement in accuracy. The CLUTCH sensitivity method in particular excelled in terms of efficiency and computational memory requirements.

Perfetti, Christopher M [ORNL; Rearden, Bradley T [ORNL

2013-01-01T23:59:59.000Z

87

Gain effect waveguide optical amplifiers for Si microphotonics  

E-Print Network (OSTI)

(cont.) Er-based gain. We reported the first infrared photoluminescence PL study of Er?O? and found a 7 ms lifetime at 4 K, attributed to a metastable FCC or HCP phase. We showed the thermodynamically stable BCC crystal ...

Saini, Sajan, 1973-

2004-01-01T23:59:59.000Z

88

Fuzzy gain scheduling technique for power flow control  

Science Conference Proceedings (OSTI)

An application of fuzzy logic based control for power systems governing multiple Flexible Alternating Current Transmission System (FACTS) devices is described here. Sufficiently accurate relations have been derived to determine setpoints of FACTS ... Keywords: AC transmission, FACTS devices, Switzerland, flexible alternating current transmission system, fuzzy control, fuzzy gain scheduling, fuzzy logic, power flow control, power systems, sensitivity analysis

Alexandre Oudalov; Petr Korba; Rachid Cherkaoui; Alain J. Germond

2006-10-01T23:59:59.000Z

89

Generalized solar load ratio correlation for direct gain buildings  

DOE Green Energy (OSTI)

A generalized solar load ratio correlation has been developed for direct gain buildings by generating relationships between the correlation parameters and two fundamental design parameters. The first design parameter is the steady state conductance of the solar aperture, U/sub c/. The second is the effective heat capacity of the solar zone, EHC.

Wray, W.O.; Best, E.D.

1986-01-01T23:59:59.000Z

90

Google's Loss: The Public's Gain APRIL 28, 2011  

E-Print Network (OSTI)

Google's Loss: The Public's Gain APRIL 28, 2011 Robert Darnton Musée du Louvre, Paris Jean a postmortem on Google's attempt to digitize and sell millions of books, despite the decision by Judge Denny Chin on March 23 to reject the agreement that seemed to make Google's project possible. Google Book

Hofri, Micha

91

Impact of Solar Heat Gain on Radiant Floor Cooling System Design  

E-Print Network (OSTI)

Bauman F. 2013. Impact of Solar Heat Gain on Radiant FloorBauman F. 2013. Impact of Solar Heat Gain on Radiant FloorBauman F. 2013. Impact of Solar Heat Gain on Radiant Floor

Feng, Jingjuan Dove; Schiavon, Stefano; Bauman, Fred

2013-01-01T23:59:59.000Z

92

NIST X-Ray Mass Attenuation Coefficients - Version History  

Science Conference Proceedings (OSTI)

... year, month day with database access date.) Hubbell, JH and Seltzer, SM (2004), Tables of X-Ray Mass Attenuation Coefficients and Mass Energy- ...

2010-10-05T23:59:59.000Z

93

Estimation of Heat Transfer Coefficient in Squeeze Casting of ...  

Science Conference Proceedings (OSTI)

The casting-die interfacial heat transfer coefficient(IHTC) in 5-step casting was .... from First-Principles: Solid-Solution Strengthening, Softening, and Cross-Slip.

94

Determination of Heat Transfer Coefficient Distribution at Part ...  

Science Conference Proceedings (OSTI)

... of oil flow on the heat transfer coefficient (HTC) distribution at the gear surface. ... Multiphase Flow in a Steelmaking Converter Using an Unconventional Lance.

95

Kinetic theory of the interdiffusion coefficient in dense plasmas  

DOE Green Energy (OSTI)

Naive applications of Spitzer's theory to very dense plasmas can lead to negative diffusion coefficients. The interdiffusion coefficients in Binary Ionic Mixtures (two species of point ions in a uniform neutralizing background) have been calculated recently using molecular dynamics techniques. These calculations can provide useful benchmarks for theoretical evaluations of the diffusion coefficient in dense plasma mixtures. This paper gives a brief description of a kinetic theoretic approximation to the diffusion coefficient which generalizes Spitzer to high density and is in excellent agreement with the computer simulations. 15 refs., 1 fig., 2 tabs.

Boercker, D.B.

1986-08-01T23:59:59.000Z

96

Derivation of the coefficient squared probability law in quantum mechanics  

E-Print Network (OSTI)

If one assumes there is probability of perception in quantum mechanics, then unitarity dictates that it must have the coefficient squared form, in agreement with experiment.

Casey Blood

2013-06-02T23:59:59.000Z

97

Application of small-signal fusion energy gain  

SciTech Connect

The measured burnup fraction of the 1-MeV tritons produced in a deuterium tokamak plasma, multiplied by 17.5, is essentially the small-signal fusion energy gain g/sub T/ for an ideal 1-MeV triton beam injected into the deuterium plasma. The measured g/sub T/ can be converted directly into the two-component fusion energy gain that would be realized if a lower energy tritium beam were injected into the plasma, or if a deuterium beam were injected into a tritium target plasma having the same parameters as the acutal deuterium plasma. Under certain conditions, g/sub T/ greater than or equal to 1 can be obtained by injection of a low-current 225-keV tritium beam into a hot deuterium plasma, thereby verifying that the plasma has the essential characteristics needed for achieving macroscopic fusion energy ''break-even.''

Jassby, D.L.

1986-11-01T23:59:59.000Z

98

Stability in High Gain Plasmas in DIII-D  

SciTech Connect

Fusion power gain has been increased by a factor of 3 in DIII-D plasmas through the use of strong discharge shaping and tailoring of the pressure and current density profiles. H-mode plasmas with weak or negative central magnetic shear are found to have neoclassical ion confinement throughout most of the plasma volume. Improved MHD stability is achieved by controlling the plasma pressure profile width. The highest fusion power gain Q (ratio of fusion power to input power) in deuterium plasmas was 0.0015. which extrapolates to an equivalent Q of 0.32 in a deuterium-tritium plasma and is similar to values achieved in tokamaks of larger size and magnetic fields.

Lazarus, E. A.; Hong, R. M. [Oak Ridge National Lab., TN (United States); Navratil, G. A.; Sabbagh, S. [Columbia Univ., New York, NY (United States); Strait, E. J.; Rice, B. W. [Lawrence Livermore National Lab., CA (United States); Ferron, J. R.; Greenfield, C. M.; Austin, M. E. [Maryland Univ., College Park, MD (United States); Chan, V. S.; DeBoo, J. C.; Doyle, E. J. [California Univ., Los Angeles, CA (United States; Durst, R. [Wisconsin Univ., Madison, WI (United States); Forest, C. B. [California Univ., Irvine, CA (United States); Leonard, A. W. [Oak Ridge Associated Universities, Inc., TN (United States); Schissel, D. P. [JET Joint Undertaking, Abingdon (United Kingdom)

1997-01-01T23:59:59.000Z

99

Incremental cooling load determination for passive direct gain heating systems  

DOE Green Energy (OSTI)

This paper examines the applicability of the National Association of Home Builders (NAHB) full load compressor hour method for predicting the cooling load increase in a residence, attributable to direct gain passive heating systems. The NAHB method predictions are compared with the results of 200 hour-by-hour simulations using BLAST and the two methods show reasonable agreement. The degree of agreement and the limitations of the NAHB method are discussed.

Sullivan, P.W.; Mahone, D.; Fuller, W.; Gruber, J.; Kammerud, R.; Place, W.; Andersson, B.

1981-05-01T23:59:59.000Z

100

Wind Gains ground, hitting 33 GW of installed capacity  

Science Conference Proceedings (OSTI)

The U.S. currently has 33 GW of installed wind capacity. Wind continues to gain ground, accounting for 42 percent of new capacity additions in the US in 2008.Globally, there are now 146 GW of wind capacity with an impressive and sustained growth trajectory that promises to dominate new generation capacities in many developing countries. The U.S., however, lags many European countries, with wind providing roughly 2 percent of electricity generation.

NONE

2010-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Gain Scheduled Control Using the Dual Youla Parameterization  

E-Print Network (OSTI)

Stability is a critical issue in gain-scheduled control problems in that the closed loop system may not be stable during the transitions between operating conditions despite guarantees that the gain-scheduled controller stabilizes the plant model at fixed values of the scheduling variable. For Linear Parameter Varying (LPV) model representations, a controller interpolation method using Youla parameterization that guarantees stability despite fast transitions in scheduling variables is proposed. By interconnecting an LPV plant model with a Local Controller Network (LCN), the proposed Youla parameterization based controller interpolation method allows the interpolation of controllers of different size and structure, and guarantees stability at fixed points over the entire operating region. Moreover, quadratic stability despite fast scheduling is also guaranteed by construction of a common Lyapunov function, while the characteristics of individual controllers designed a priori at fixed operating condition are recovered at the design points. The efficacy of the proposed approach is verified with both an illustrative simulation case study on variation of a classical MIMO control problem and an experimental implementation on a multi-evaporator vapor compression cycle system. The dynamics of vapor compression systems are highly nonlinear, thus the gain-scheduled control is the potential to achieve the desired stability and performance of the system. The proposed controller interpolation/switching method guarantees the nonlinear stability of the closed loop system during the arbitrarily fast transition and achieves the desired performance to subsequently improve thermal efficiency of the vapor compression system.

Chang, Young Joon

2010-05-01T23:59:59.000Z

102

Calculation of fusion product angular correlation coefficients for fusion plasmas  

SciTech Connect

The angular correlation coefficients for fusion products are calculated in the cases of Maxwellian and beam-target plasmas. Measurement of these coefficients as a localized ion temperature or fast-ion diagnostic is discussed. 8 refs., 7 figs., 1 tab.

Murphy, T.J.

1987-08-01T23:59:59.000Z

103

Does the photon-diffusion coefficient depend on absorption?  

E-Print Network (OSTI)

and M. C. Edlund, The Elements of Nuclear Reactor Theory (Van Nostrand, New York, 1952), Chaps. 5 and 14 diffusion coefficient gives better agreement with theory than the traditionally accepted photon diffusion diffusion theory by using the two different diffu- sion coefficients, we quantitatively demonstrate

Boas, David

104

Field Measurement Studies on Shunt Coefficient of Lightning Shield Line  

Science Conference Proceedings (OSTI)

The shunt coefficient of lightning shield line is an important parameter, which needs to be considered when we are designing or reforming the substation grounding network, however, it is difficult to be calculated. This paper is to introduce a method ... Keywords: Short circuit current, Lightning shield line, Shunt coefficient, Shunt impedance

Dechao Li; Jinglu Li; Yuhuan Zhang

2008-10-01T23:59:59.000Z

105

ORISE: Dose Coefficients for Intakes of Radionuclides via Contaminated  

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

Dose Coefficients for Intakes of Radionuclides via Contaminated Wounds Dose Coefficients for Intakes of Radionuclides via Contaminated Wounds Dose coefficients for 38 radionuclides based on NCRP Wound Model and ICRP biokinetic models This report is intended to assist health physics and medical staff in more rapidly assessing the potential dosimetric consequences of a contaminated wound. The National Council on Radiation Protection and Measurements Wound Model describing the retention of selected radionuclides at the site of a contaminated wound and their uptake into the transfer compartment has been combined with the International Commission on Radiological Protection element-specific systemic models for those radionuclides to derive dose coefficients for intakes via contaminated wounds. Examples are also provided on using the dose coefficients to generate derived reference

106

High resolution BPMS with integrated gain correction system  

Science Conference Proceedings (OSTI)

High resolution beam position monitors (BPM) are an essential tool to achieve and reproduce a low vertical beam emittance at the KEK Accelerator Test Facility (ATF) damping ring. The ATF damping ring (DR) BPMs are currently upgraded with new high resolution read-out electronics. Based on analog and digital down-conversion techniques, the upgrade includes an automatic gain calibration system to correct for slow drift effects and ensure high reproducible beam position readings. The concept and its technical realization, as well as preliminary results of beam studies are presented.

Wendt, M.; Briegel, C.; Eddy, N.; Fellenz, B.; Gianfelice, E.; Prieto, P.; Rechenmacher, R.; Voy, D.; /Fermilab; Terunuma, N.; Urakawa, J.; /KEK, Tsukuba

2009-08-01T23:59:59.000Z

107

Using Quantum Coherence to Enhance Gain in Atomic Physics  

E-Print Network (OSTI)

Quantum coherence and interference effects in atomic and molecular physics has been extensively studied due to intriguing counterintuitive physics and potential important applications. Here we present one such application of using quantum coherence to generate and enhance gain in extreme ultra-violet(XUV)(@58.4nm in Helium) and infra-red(@794.76nm in Rubidium) regime of electromagnetic radiation. We show that using moderate external coherent drive, a substantial enhancement in the energy of the lasing pulse can be achieved under optimal conditions. We also discuss the role of coherence. The present paper is intended to be pedagogical on this subject of coherence-enhanced lasing.

Pankaj K. Jha

2013-01-28T23:59:59.000Z

108

FEL GAIN LENGTH AND TAPER MEASUREMENTS AT LCLS  

Science Conference Proceedings (OSTI)

We present experimental studies of the gain length and saturation power level from 1.5 nm to 1.5 Angstroms at the Linac Coherent Light Source (LCLS). By disrupting theFEL process with an orbit kick, we are able to measure the X-ray intensity as a function of undulator length. This kick method is cross-checked with the method of removing undulator sections. We also study the FEL-induced electron energy loss after saturation to determine the optimal taper of the undulator K values. The experimental results are compared to theory and simulations.

Ratner, D.; Fawley, W. M.; Brachmann, A.; Decker, F.J.; Ding, Y.; Dowell, D.; Emma, P.; Frisch, J.; Gilevich, S.; Hays, G.; Hering, P.; Huang, Z.; Loos, H.; Miahnahri, A.; Nuhn, H.D.; Turner, J.; Welch, J.; White, W.; Wu, J.; Xiang, D.; Yocky, G.; Fawley, W. M.

2009-08-14T23:59:59.000Z

109

Skill Scores and Correlation Coefficients in Model Verification  

Science Conference Proceedings (OSTI)

Attributes of the anomaly correlation coefficient, as a model verification measure, are investigated by exploiting a recently developed method of decomposing skill scores into other measures of performance. A mean square error skill score based ...

Allan H. Murphy; Edward S. Epstein

1989-03-01T23:59:59.000Z

110

Some comments on `Equation for the second virial coefficient`  

E-Print Network (OSTI)

The second viral coefficient calculated using the equation suggested in the paper of Kaplun A.B., Meshalkin A.B. Equation for the second virial coefficient published in High temperature high pressure, 1999, Volume 31, pages 253-258 is compared with experimental data for helium, hydrogen, neon, argon, krypton, xenon, carbon dioxide, water, ammonia, methane, ethylene. It is shown the formula cannot describe the temperature dependence of the experimental data on the second virial coefficient for the all above substances within the experimental error over the investigated temperature interval. The latter is in controversy with the derivations of the paper mentioned above. It is also shown the formula cannot describe the recommended data for the second virial coefficient within their uncertainties for helium, hydrogen, neon, argon, krypton and methane.

Umirzakov, I H

2013-01-01T23:59:59.000Z

111

Wind Stress Drag Coefficient over the Global Ocean  

Science Conference Proceedings (OSTI)

Interannual and climatological variations of wind stress drag coefficient (CD) are examined over the global ocean from 1998 to 2004. Here CD is calculated using high temporal resolution (3- and 6-hourly) surface atmospheric variables from two ...

A. Birol Kara; Alan J. Wallcraft; E. Joseph Metzger; Harley E. Hurlburt; Chris W. Fairall

2007-12-01T23:59:59.000Z

112

Stability-Dependent Exchange Coefficients for AirSea Fluxes  

Science Conference Proceedings (OSTI)

This study introduces exchange coefficients for wind stress (CD), latent heat flux (CL), and sensible heat flux (CS) over the global ocean. They are obtained from the state-of-the-art Coupled OceanAtmosphere Response Experiment (COARE) bulk ...

A. Birol Kara; Harley E. Hurlburt; Alan J. Wallcraft

2005-07-01T23:59:59.000Z

113

A simple estimator for the distribution of random coefficients  

E-Print Network (OSTI)

We propose a simple mixtures estimator for recovering the joint distribution of parameter heterogeneity in economic models, such as the random coefficients logit. The estimator is based on linear regression subject to ...

Ryan, Stephen

114

Asymptotic Properties of an Autocorrelation Coefficient for Coherent Doppler Sonar  

Science Conference Proceedings (OSTI)

A new formula is derived for the asymptotic form of the magnitude of an autocorrelation coefficient for coherent Doppler sonar. The autocorrelation magnitude is shown to be a biased estimator in the limit of infinite ensemble length. Numerical ...

Jeremy Dillon; Len Zedel; Alex E. Hay

2011-07-01T23:59:59.000Z

115

Wind heat transfer coefficient in solar collectors in outdoor conditions  

Science Conference Proceedings (OSTI)

Knowledge of wind heat transfer coefficient, h{sub w}, is required for estimation of upward losses from the outer surface of flat plate solar collectors/solar cookers. In present study, an attempt has been made to estimate the wind induced convective heat transfer coefficient by employing unglazed test plate (of size about 0.9 m square) in outdoor conditions. Experiments, for measurement of h{sub w}, have been conducted on rooftop of a building in the Institute campus in summer season for 2 years. The estimated wind heat transfer coefficient has been correlated against wind speed by linear regression and power regression. Experimental values of wind heat transfer coefficient estimated in present work have been compared with studies of other researchers after normalizing for plate length. (author)

Kumar, Suresh; Mullick, S.C. [Centre for Energy Studies, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110 016 (India)

2010-06-15T23:59:59.000Z

116

On Lateral Dispersion Coefficients as Functions of Averaging Time  

Science Conference Proceedings (OSTI)

Plume dispersion coefficients are discussed in terms of single-particle and relative diffusion, and are investigated as functions of averaging time. To demonstrate the effects of averaging time on the relative importance of various dispersion ...

C. M. Sheih

1980-05-01T23:59:59.000Z

117

Wavelength Dependence of Aerosol Extinction Coefficient for Stratospheric Aerosols  

Science Conference Proceedings (OSTI)

A simple empirical formula for the wavelength dependence of the aerosol extinction coefficient is proposed. The relationship between the constants in the formula and the variable parameter in the aerosol size distribution is explicitly expressed. ...

Glenn K. Yue

1986-11-01T23:59:59.000Z

118

Generalized Levinson-Durbin sequences, binomial coefficients and autoregressive estimation  

Science Conference Proceedings (OSTI)

For a discrete time second-order stationary process, the Levinson-Durbin recursion is used to determine the coefficients of the best linear predictor of the observation at time k+1, given k previous observations, best in the sense of minimizing the mean ... Keywords: 05A10, 11B65, 62M10, Binomial coefficients, Generalized Levinson-Durbin sequence, Least squares estimator, Levinson-Durbin sequence, Partial correlations, Yule-Walker estimator

Paul Shaman

2010-05-01T23:59:59.000Z

119

Development of a pressure gain combustor for improved cycle efficiency  

SciTech Connect

This paper presents results from an experimental research program attempting to improve the thermodynamic efficiencies of gas-turbine combustors. An elementary thermodynamic analysis shows that the thermodynamic cycle efficiencies of gas turbines can be significantly improved by using unsteady combustion that achieves quasi-constant-volume combustion. The ability to produce the so-called pressure gain via this process has already been demonstrated by others for pressures less than 3 atmospheres. This paper presents experimental results for pressures up to 11 atmospheres, compares certain process parameters to a numerical simulation, and briefly examines the problem of scale-up. Results of pollutant measurements over the 2--11 atmospheric range of operation are also included.

Gemmen, R.S.; Richards, G.A.; Janus, M.C.

1994-09-01T23:59:59.000Z

120

Casimir forces in multilayer magnetodielectrics with both gain and loss  

Science Conference Proceedings (OSTI)

A path-integral approach to the quantization of the electromagnetic field in a linearly amplifying magnetodielectric medium is presented. Two continua of inverted harmonic oscillators are used to describe the polarizability and magnetizability of the amplifying medium. The causal susceptibilities of the amplifying medium, with negative imaginary parts in finite frequency intervals, are identified and their relationships to microscopic coupling functions are determined. By carefully relating the two-point functions of the field theory to the optical Green functions, we calculate the Casimir energy and Casimir forces for a multilayer magnetodielectric medium with both gain and loss. We point out the essential differences with a purely passive layered medium. For a single layer, we find different bounds on the Casimir force for fully amplifying and for lossy media. The force is attractive in both cases, even if the medium exhibits negative refraction. From our Lagrangian we also derive by canonical quantization the postulates of the phenomenological theory of amplifying magnetodielectrics.

Amooghorban, Ehsan [Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens. Lyngby (Denmark); Department of Physics, University of Isfahan, Hezar Jarib Avenue, Isfahan (Iran, Islamic Republic of); Wubs, Martijn; Mortensen, N. Asger [Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens. Lyngby (Denmark); Kheirandish, Fardin [Department of Physics, University of Isfahan, Hezar Jarib Avenue, Isfahan (Iran, Islamic Republic of)

2011-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Effect of Mixed Working Fluid Composition on Binary Cycle Condenser Heat Transfer Coefficients  

DOE Green Energy (OSTI)

Effect of Mixed Working Fluid Composition on Binary Cycle Condenser Heat Transfer Coefficients Dan Wendt, Greg Mines Idaho National Laboratory The use of mixed working fluids in binary power plants can provide significant increases in plant performance, provided the heat exchangers are designed to take advantage of these fluids non-isothermal phase changes. In the 1980's testing was conducted at DOE's Heat Cycle Research Facility (HCRF) where mixtures of different compositions were vaporized at supercritical pressures and then condensed. This testing had focused on using the data collected to verify that Heat Transfer Research Incorporated (HTRI) codes were suitable for the design of heat exchangers that could be used with mixtures. The HCRF data includes mixture compositions varying from 0% to 40% isopentane and condenser tube orientations of 15{sup o}, 60{sup o}, and 90{sup o} from horizontal. Testing was performed over a range of working fluid and cooling fluid conditions. Though the condenser used in this testing was water cooled, the working fluid condensation occurred on the tube-side of the heat exchanger. This tube-side condensation is analogous to that in an air-cooled condenser. Tube-side condensing heat transfer coefficient information gleaned from the HCRF testing is used in this study to assess the suitability of air-cooled condenser designs for use with mixtures. Results of an air-cooled binary plant process model performed with Aspen Plus indicate that that the optimal mixture composition (producing the maximum net power for the scenario considered) is within the range of compositions for which data exist. The HCRF data is used to assess the impact of composition, tube orientation, and process parameters on the condensing heat transfer coefficients. The sensitivity of the condensing coefficients to these factors is evaluated and the suitability of air-cooled condenser designs with mixtures is assessed. This paper summarizes the evaluation of the HCRF data and discusses the next steps in the project evaluation of air-cooled condenser designs that can take advantage of the performance gains possible with these fluids.

Dan Wendt; Greg Mines

2011-10-01T23:59:59.000Z

122

Diffusion coefficients in trimethyleneoxide containing comb branch polymer  

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

Diffusion coefficients in trimethyleneoxide containing comb branch polymer Diffusion coefficients in trimethyleneoxide containing comb branch polymer electrolytes Title Diffusion coefficients in trimethyleneoxide containing comb branch polymer electrolytes Publication Type Journal Article Year of Publication 2004 Authors Liu, Gao, Craig L. Reeder, Xiaoguang Sun, and John B. Kerr Journal Solid State Ionics Volume 175 Pagination 781-783 Keywords comb branch polyethers, conductivity, lithium battery, polymer electrolytes, salt diffusion coefficient, trimethylene oxide Abstract This paper reports on a new comb branch polymer based on trimethylene oxide (TMO) side chains as a polymer electrolyte for potential application in lithium metal rechargeable batteries. The trimethylene oxide (TMO) units are attached to the side chains of a polyepoxide ether to maximize the segmental motion. Lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) salt was used to formulate the polymer electrolyte with the new TMO containing polymers. The new polymer electrolytes show improved salt diffusion coefficients (Ds) and conductivity at ambient and subambient temperature compare to the ethylene oxide (EO) counterpart, whereas performance at high temperature (85 °C) remains the same or is actually worse for salt diffusivity.

123

U-092: Sudo Format String Bug Lets Local Users Gain Elevated...  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis...

124

Heart Rate Variability Analysis Using Threshold of Wavelet Package Coefficients  

E-Print Network (OSTI)

In this paper, a new efficient feature extraction method based on the adaptive threshold of wavelet package coefficients is presented. This paper especially deals with the assessment of autonomic nervous system using the background variation of the signal Heart Rate Variability HRV extracted from the wavelet package coefficients. The application of a wavelet package transform allows us to obtain a time-frequency representation of the signal, which provides better insight in the frequency distribution of the signal with time. A 6 level decomposition of HRV was achieved with db4 as mother wavelet, and the above two bands LF and HF were combined in 12 specialized frequencies sub-bands obtained in wavelet package transform. Features extracted from these coefficients can efficiently represent the characteristics of the original signal. ANOVA statistical test is used for the evaluation of proposed algorithm.

Kheder, G; Massoued, M Ben; Samet, M

2009-01-01T23:59:59.000Z

125

Transport coefficients for dense hard-disk systems  

E-Print Network (OSTI)

A study of the transport coefficients of a system of elastic hard disks, based on the use of Helfand-Einstein expressions is reported. The self-diffusion, the viscosity, and the heat conductivity are examined with averaging techniques especially appropriate for the use in event-driven molecular dynamics algorithms with periodic boundary conditions. The density and size dependence of the results is analyzed, and comparison with the predictions from Enskog's theory is carried out. In particular, the behavior of the transport coefficients in the vicinity of the fluid-solid transition is investigated and a striking power law divergence of the viscosity in this region is obtained, while all other examined transport coefficients show a drop in that density range.

Ramn Garca-Rojo; Stefan Luding; J. Javier Brey

2005-11-28T23:59:59.000Z

126

Anomaly induced transport coefficients, from weak to strong coupling  

E-Print Network (OSTI)

The existence of new transport phenomena associated to the presence of quantum anomalies has atracted very recently the attention of theorist. These transport coefficient have very interesting properties, for example, they do not renormalize. The most famous case of anomaly induced transport phenomena is the Chiral Magnetic Effect, in which an electric current is produced by a magnetic field if the system has a different number of right handed fermions respect the left handed one. In this thesis we have studied those transport coefficients from Kubo formulas at weak and strong coupling. To finish a fluid/gravity approach is used to compute all the second order anomalous coefficients in an anomalous conformal fluid.

Francisco Pena-Benitez

2013-07-01T23:59:59.000Z

127

RECOMBINATION RATE COEFFICIENTS OF Be-LIKE Si  

SciTech Connect

Recombination of Be-like Si{sup 10+} over the 0-43 eV electron-ion energy range is measured at the CRYRING electron cooler. In addition to radiative and dielectronic recombination, the recombination spectrum also shows strong contributions from trielectronic recombination. Below 100 meV, several very strong resonances associated with a spin-flip of the excited electron dominate the spectrum and also dominate the recombination in the photoionized plasma. The resonant plasma rate coefficients corrected for the experimental field ionization are in good agreement with calculated results by Gu and with AUTOSTRUCTURE calculations. All other calculations significantly underestimate the plasma rate coefficients at low temperatures.

Orban, I.; Boehm, S.; Schuch, R. [Department of Physics, Stockholm University, 10691 Stockholm (Sweden); Loch, S. D. [Department of Physics, Auburn University, Auburn, AL 36849 (United States)

2010-10-01T23:59:59.000Z

128

Measurement and quantification of aggregate thermal coefficient of expansion  

E-Print Network (OSTI)

The coefficient of thermal expansion of concrete affects thermal related distresses in pavements. Factors affecting expansion of concrete and aggregates along with existing models are reviewed. A test method to measure the coefficient of thermal expansion of aggregates is proposed. Existing methods used to analyze oxide contents are evaluated. A relation between the oxide content of various elements in aggregates and the CTE of aggregate is presented. Results obtained from the proposed method are presented. A model is also presented for the CTE of concrete based on aggregate properties.

Chande, Gautam U

1997-01-01T23:59:59.000Z

129

Multivariate linear recursions with Markov-dependent coefficients  

Science Conference Proceedings (OSTI)

We study a linear recursion with random Markov-dependent coefficients. In a ''regular variation in, regular variation out'' setup we show that its stationary solution has a multivariate regularly varying distribution. This extends results previously ... Keywords: Heavy tails, Multivariate random recursions, Multivariate regular variation, Random vector equations, Stochastic difference equation, Tail asymptotic, primary, secondary

Diana Hay; Reza Rastegar; Alexander Roitershtein

2011-03-01T23:59:59.000Z

130

Electromagnetic fields and transport coefficients in a hot pion gas  

E-Print Network (OSTI)

We present recent results on finite temperature electromagnetic form factors and the electrical conductivity in a pion gas. The standard Chiral Perturbation Theory power counting needs to be modified for transport coefficients. We pay special attention to unitarity and to possible applications for dilepton and photon production.

A. Gomez Nicola; D. Fernandez-Fraile

2006-08-24T23:59:59.000Z

131

Evaluation of diffusion coefficients from nonlinear impurity profiles  

Science Conference Proceedings (OSTI)

At high concentrations, impurity diffusion in semiconductors is governed by nonlinear diffusion processes. Using similarity analysis, a general expression for evaluation of the diffusion coefficient from experimental impurity profiles derived for the case of redistributive diffusion of implanted impurities. This expression corresponds to the Boltzmann-Matano analysis for the case of diffusion with constant surface concentration.

Anderson, D.; Jeppson, K.O.

1985-06-01T23:59:59.000Z

132

Lower bounds on the bounded coefficient complexity of bilinear maps  

Science Conference Proceedings (OSTI)

We prove lower bounds of order n log n for both the problem of multiplying polynomials of degree n, and of dividing polynomials with remainder, in the model of bounded coefficient arithmetic circuits over the complex numbers. These ... Keywords: Algebraic complexity, bilinear circuits, lower bounds, singular values

Peter Brgisser; Martin Lotz

2004-05-01T23:59:59.000Z

133

Young modulus dependence of nanoscopic friction coefficient in hard coatings  

E-Print Network (OSTI)

with miniature moving parts, such as micro- electromechanical systems and hard-disk drives.1,2 A betterYoung modulus dependence of nanoscopic friction coefficient in hard coatings Elisa Riedoa with varying hardness obtained by different growth temperatures. For the CrN films, we show that the changes

Brune, Harald

134

Evaluating transport coefficients in real time thermal field theory  

E-Print Network (OSTI)

Transport coefficients in a hadronic gas have been calculated earlier in the imaginary time formulation of thermal field theory. The steps involved are to relate the defining retarded correlation function to the corresponding time-ordered one and to evaluate the latter in the conventional perturbation expansion. Here we carry out both the steps in the real time formulation.

S. Mallik; Sourav Sarkar

2012-11-12T23:59:59.000Z

135

Variation of the Heat Transfer Coefficient with Environmental Parameters  

Science Conference Proceedings (OSTI)

Experimentally determined coefficients of the sensible heat flux across the air-sea interface are shown to vary with both wind velocity and difference in temperatures between the sea surface and the 10-m elevation. A simple formula is proposed to ...

Jin Wu

1992-03-01T23:59:59.000Z

136

TEST METHOD FOR COEFFICIENT OF LINEAR THERMAL EXPANSION OF CONCRETE  

E-Print Network (OSTI)

1.1 This method covers the determination of the coefficient of linear thermal expansion of concrete test specimens by determinations of length change due to temperature changes. Because the thermal coefficient of concrete varies with moisture condition, being a minimum when saturated or oven dry and a maximum at about 70 percent saturated, it is important to select the relevant moisture condition for the tests to be made. 2. Apparatus 2.1. The apparatus shall consist of: 2.1.1 Heating Bath- A water bath in which concrete specimens can be maintained at a temperature of 140 2 F (60 1.1 C) (Note 1) 2.1.2 Cooling Bath- A water bath in which

unknown authors

1981-01-01T23:59:59.000Z

137

Verifying the Dependence of Fractal Coefficients on Different Spatial Distributions  

SciTech Connect

A fractal distribution requires that the number of objects larger than a specific size r has a power-law dependence on the size N(r) = C/r{sup D}propor tor{sup -D} where D is the fractal dimension. Usually the correlation integral is calculated to estimate the correlation fractal dimension of epicentres. A 'box-counting' procedure could also be applied giving the 'capacity' fractal dimension. The fractal dimension can be an integer and then it is equivalent to a Euclidean dimension (it is zero of a point, one of a segment, of a square is two and of a cube is three). In general the fractal dimension is not an integer but a fractional dimension and there comes the origin of the term 'fractal'. The use of a power-law to statistically describe a set of events or phenomena reveals the lack of a characteristic length scale, that is fractal objects are scale invariant. Scaling invariance and chaotic behavior constitute the base of a lot of natural hazards phenomena. Many studies of earthquakes reveal that their occurrence exhibits scale-invariant properties, so the fractal dimension can characterize them. It has first been confirmed that both aftershock rate decay in time and earthquake size distribution follow a power law. Recently many other earthquake distributions have been found to be scale-invariant. The spatial distribution of both regional seismicity and aftershocks show some fractal features. Earthquake spatial distributions are considered fractal, but indirectly. There are two possible models, which result in fractal earthquake distributions. The first model considers that a fractal distribution of faults leads to a fractal distribution of earthquakes, because each earthquake is characteristic of the fault on which it occurs. The second assumes that each fault has a fractal distribution of earthquakes. Observations strongly favour the first hypothesis.The fractal coefficients analysis provides some important advantages in examining earthquake spatial distribution, which are: - Simple way to quantify scale-invariant distributions of complex objects or phenomena by a small number of parameters. - It is becoming evident that the applicability of fractal distributions to geological problems could have a more fundamental basis. Chaotic behaviour could underlay the geotectonic processes and the applicable statistics could often be fractal.The application of fractal distribution analysis has, however, some specific aspects. It is usually difficult to present an adequate interpretation of the obtained values of fractal coefficients for earthquake epicenter or hypocenter distributions. That is why in this paper we aimed at other goals - to verify how a fractal coefficient depends on different spatial distributions. We simulated earthquake spatial data by generating randomly points first in a 3D space - cube, then in a parallelepiped, diminishing one of its sides. We then continued this procedure in 2D and 1D space. For each simulated data set we calculated the points' fractal coefficient (correlation fractal dimension of epicentres) and then checked for correlation between the coefficients values and the type of spatial distribution.In that way one can obtain a set of standard fractal coefficients' values for varying spatial distributions. These then can be used when real earthquake data is analyzed by comparing the real data coefficients values to the standard fractal coefficients. Such an approach can help in interpreting the fractal analysis results through different types of spatial distributions.

Gospodinov, Dragomir [Plovdiv University 'Paisii Hilendarski', 24, Tsar Asen Str., Plovdiv (Bulgaria); Geophysical Institute of Bulgarian Academy of Sciences, Akad. G. Bonchev Str., bl.3, Sofia (Bulgaria); Marekova, Elisaveta; Marinov, Alexander [Plovdiv University 'Paisii Hilendarski', 24, Tsar Asen Str., Plovdiv (Bulgaria)

2010-01-21T23:59:59.000Z

138

U-010:HP Onboard Administrator Unspecified Flaw Lets Remote Users Gain  

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

0:HP Onboard Administrator Unspecified Flaw Lets Remote Users 0:HP Onboard Administrator Unspecified Flaw Lets Remote Users Gain Access U-010:HP Onboard Administrator Unspecified Flaw Lets Remote Users Gain Access October 13, 2011 - 8:15am Addthis PROBLEM: HP Onboard Administrator Unspecified Flaw Lets Remote Users Gain Access PLATFORM: Onboard Administrator (OA) 3.21 through 3.31 ABSTRACT: A remote user can gain access to the target system reference LINKS: HP Support document ID: c03048779 SecurityTracker Alert ID: 1026158 CVE-2011-3155 IMPACT ASSESSMENT: Medium Discussion: A potential security vulnerability has been identified with HP Onboard Administrator (OA). The vulnerability could be exploited remotely to gain unauthorized access. Impact: A remote user can gain access to the target system. Solution: Onboard Administrator (OA) v3.32 is available.

139

Estimation of tracer diffusion coefficients of ions in aqueous solution  

DOE Green Energy (OSTI)

Equations are given for estimating tracer diffusion coefficients D/sub i//sup 0/ of ions at infinite dilution in terms of limiting ionic conductances ..lambda../sub i//sup 0/. Also given are generalized Nernst-Hartley equations for binary and multicomponent diffusion coefficients D/sup 0/ and D/sub ij//sup 0/, respectively, at infinite dilution. Data, estimates, and correlations for ..lambda../sub i//sup 0/ at 25/sup 0/C and other temperatures are discussed. Estimated values of ..lambda../sub i//sup 0/ are tabulated from 0-300/sup 0/C for ions of waste isolation interest and for ions of economic interest in geothermal brines. Estimates of their tracer diffusion coefficients at infinite dilution are tabulated. A rule of thumb, good to a factor of 2, is presented. Very limited data (available only at 25/sup 0/C) indicate that D/sub i//D/sub i//sup 0/ generally declines as the concentration of salt or supporting electrolyte increases. 6 figures, 2 tables.

Miller, D.G.

1982-09-07T23:59:59.000Z

140

Components of Congestion: Delay from Incidents, Special Events, Lane Closures, Weather, Potential Ramp Metering Gain, and Excess Demand  

E-Print Network (OSTI)

potential reduction due to metering needs to be interpretedCollisions, Potential Ramp Metering Gain, and Excess Demand.Weather, Potential Ramp Metering Gain, and Excess Demand

Kwon, Jaimyoung; Mauch, Michael; Varaiya, Pravin

2006-01-01T23:59:59.000Z

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


141

ARM: 2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

DOE Data Explorer (OSTI)

2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

142

ARM: 10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

DOE Data Explorer (OSTI)

10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Rob Newsom; John Goldsmith

143

ARM: 1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

DOE Data Explorer (OSTI)

1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

144

ARM: 10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

DOE Data Explorer (OSTI)

10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

145

ARM: 10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

Science Conference Proceedings (OSTI)

10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

2010-12-15T23:59:59.000Z

146

ARM: 1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

Science Conference Proceedings (OSTI)

1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

2010-12-15T23:59:59.000Z

147

V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated...  

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

ID: 1028209 IMPACT ASSESSMENT: Medium DISCUSSION: When Access Protection has been disabled, a local user can gain full control of the target application IMPACT: A local user...

148

Optimal consumption and investment for markets with randoms coefficients  

E-Print Network (OSTI)

We consider an optimal consumption - investment problem for financial markets of Black-Scholes's type with the random coefficients. The existence and uniqueness theorem for the Hamilton-Jacobi-Bellman (HJB) equation is shown. We construct an iterative sequence of functions converging to the solution of this equation. An optimal convergence rate for this sequence is found and sharp computable upper bounds for the approximation accuracy of the optimal consumption - investment strategies are obtained. It turns out that the optimal convergence rate in this case is super geometrical, i.e. is more rapid than any geometrical rate.

Belkacem, Berdjane

2011-01-01T23:59:59.000Z

149

Reactive sticking coefficients for silane and disilane on polycrystalline silicon  

SciTech Connect

Reactive sticking coefficients (RSCs) were measured for silane and disilane on polycrystalline silicon for a wide range of temperature and flux (pressure) conditions. The data were obtained from deposition-rate measurements using molecular beam scattering and a very low-pressure cold-wall reactor. The RSCs have nonlinear Arrhenius temperature dependencies and decrease with increasing flux at low (710 /sup 0/C) temperatures. Several simple models are proposed to explain these observations. The results are compared with previous studies of the SiH/sub 4//Si(s) reaction and low-pressure chemical vapor deposition-rate measurements.

Buss, R.J.; Ho, P.; Breiland, W.G.; Coltrin, M.E.

1988-04-15T23:59:59.000Z

150

Study in Indonesia and gain credit towards your degree! Unleash your creativity...  

E-Print Network (OSTI)

Study in Indonesia and gain credit towards your degree! Unleash your creativity... Spend a semester at Indonesia's premiere institution for visual and performing arts... StudytheArtsinIndonesia Study in Indonesia and gain credit towards your degree! ACICIS #12;w w w . a c i c i s . m u r d o c h . e d u . a u

151

Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS  

E-Print Network (OSTI)

Study in Indonesia and gain credit towards your degree! DevelopmentStudiesImmersionProgram ACICIS an internship in Indonesia! © Photograph by James Walsh #12;w w w . a c i c i s . m u r d o c h . e d u . a u development issues in Indonesia while also gaining im- portant practical skills related to advocacy

152

Gain-scheduled `1 -optimal control for boiler-turbine dynamics  

E-Print Network (OSTI)

Gain-scheduled `1 -optimal control for boiler-turbine dynamics with actuator saturation Pang; accepted 2 June 2003 Abstract This paper presents a gain-scheduled approach for boiler-turbine controller the magnitude and rate saturation constraints on actuators. The nonlinear boiler-turbine dynamics is brought

Shamma, Jeff S.

153

Configuration of a genetic algorithm for multi-objective optimisation of solar gain to buildings  

Science Conference Proceedings (OSTI)

We report the formulation and implementation of a genetic algorithm to address multi-objective optimisation of solar gain to buildings with the goal of minimising energy consumption and hence limiting carbon emissions. Heuristic optimisation approaches ... Keywords: buildings, carbon, design optimisation, parameter selection, solar gain

Ralph Evins

2010-07-01T23:59:59.000Z

154

V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated  

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

1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated 1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges February 28, 2013 - 12:05am Addthis PROBLEM: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges PLATFORM: VSE 8.8 Patch 2 with Access Protection, including Self Protection, turned off ABSTRACT: A vulnerability was reported in McAfee VirusScan Enterprise. REFERENCE LINKS: McAfee Security Bulletins ID: SB10038 SecurityTracker Alert ID: 1028209 IMPACT ASSESSMENT: Medium DISCUSSION: When Access Protection has been disabled, a local user can gain full control of the target application IMPACT: A local user can obtain elevated privileges on the target system. SOLUTION: The vendor has issued a fix (8.8 Patch 2 with HF778101, 8.8 Patch 3)

155

U-194: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated  

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

4: Symantec LiveUpdate Administrator Lets Local Users Gain 4: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privledges U-194: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privledges June 19, 2012 - 7:00am Addthis PROBLEM: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privileges . PLATFORM: Version(s): 2.3 and prior versions Abstract: Users Gain Elevated Privileges reference LINKS: Vendor Advisory SecurityTracker Alert ID: 1027182 CVE-2012-0304 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in Symantec LiveUpdate Administrator. A local user can obtain elevated privileges on the target system.The default installation of Symantec LiveUpdate Administrator installs files with full control privileges granted to the 'Everyone' group.A local user can exploit

156

V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated  

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

1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated 1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges February 28, 2013 - 12:05am Addthis PROBLEM: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges PLATFORM: VSE 8.8 Patch 2 with Access Protection, including Self Protection, turned off ABSTRACT: A vulnerability was reported in McAfee VirusScan Enterprise. REFERENCE LINKS: McAfee Security Bulletins ID: SB10038 SecurityTracker Alert ID: 1028209 IMPACT ASSESSMENT: Medium DISCUSSION: When Access Protection has been disabled, a local user can gain full control of the target application IMPACT: A local user can obtain elevated privileges on the target system. SOLUTION: The vendor has issued a fix (8.8 Patch 2 with HF778101, 8.8 Patch 3)

157

U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated  

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

2: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated 2: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated Privileges, Inject SQL Commands, and Spoof Certificates U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated Privileges, Inject SQL Commands, and Spoof Certificates February 28, 2012 - 8:45am Addthis PROBLEM: A vulnerability was reported in PostgreSQL. PLATFORM: Version(s): prior to 8.3.18, 8.4.11, 9.0.7, 9.1.3 ABSTRACT: A remote authenticated user can gain elevated privileges. A remote authenticated user can inject SQL commands. A remote user can spoof connections in certain cases. reference LINKS: Vendor Advisory Security Tracker ID 1026744 CVE-2012-0866 IMPACT ASSESSMENT: Medium Discussion: For trigger functions marked SECURITY DEFINER, a remote authenticated user can execute a trigger function and gain elevated privileges CVE-2012-0866.

158

CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS | Department  

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

CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS June 1, 2010 - 12:00pm Addthis CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS Aiken, SC - Construction of a key cleanup facility at the Savannah River Site (SRS) is gaining some serious ground given the remarkable building progress since Fall 2009. Construction and operation of the Salt Waste Processing Facility (SWPF) is among the U.S. Department of Energy's (DOE) highest cleanup priorities. When operational, SWPF will treat millions of gallons of salt waste currently stored in 49 underground tanks at SRS by removing radioactive constituents for vitrification at the nearby Defense Waste Processing Facility. Disposition of the salt waste inventory is a

159

CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS | Department  

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

CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS June 1, 2010 - 12:00pm Addthis CONSTRUCTION OF KEY CLEANUP PROJECT GAINS GOOD GROUND AT SRS Aiken, SC - Construction of a key cleanup facility at the Savannah River Site (SRS) is gaining some serious ground given the remarkable building progress since Fall 2009. Construction and operation of the Salt Waste Processing Facility (SWPF) is among the U.S. Department of Energy's (DOE) highest cleanup priorities. When operational, SWPF will treat millions of gallons of salt waste currently stored in 49 underground tanks at SRS by removing radioactive constituents for vitrification at the nearby Defense Waste Processing Facility. Disposition of the salt waste inventory is a

160

EM Gains Insight from Germany on Salt-Based Repositories | Department of  

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

Gains Insight from Germany on Salt-Based Repositories Gains Insight from Germany on Salt-Based Repositories EM Gains Insight from Germany on Salt-Based Repositories December 14, 2011 - 12:00pm Addthis Participants in the workshops in Germany toured Asse II, one of Germany’s two salt-based repositories, to gain insights into that facility’s technical challenges and proposed solutions. Pictured, left to right, are an Asse II employee, Bernhard Kienzler of the Karlsruhe Institute of Technology, CBFO Chief Scientist Roger Nelson, CBFO International Programs Manager Dr. Abraham Van Luik, and Andrew Wolfsberg, Acting Deputy Division Leader for Earth and Environmental Sciences at Los Alamos National Laboratory. Participants in the workshops in Germany toured Asse II, one of Germany's two salt-based repositories, to gain insights into that facility's

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Study of the MWPC gas gain behaviour as a function of the gas pressure and temperature  

E-Print Network (OSTI)

The Muon System of the LHCb experiment is composed of five detection stations (M1-M5) equipped with 1368 Multi-Wire Proportional Chambers (MWPC) and 24 Triple-GEM detectors. The Multi Wire Proportional Chamber (MWPC) performances (detection efficiency, time resolution, pad-cluster size and ageing properties) are heavily dependent on the gas gain. The chamber gain depends on the gas density and therefore on the gas temperature and pressure. The impact of the environmental parameters on the MWPC gain has been studied in detail. The results, togheter with a simple method proposed to account for the gain variations, are reported in this note. The absolute gas gain at the testing voltage of 2750 V was also measured to be (1.2 +- 0.1)*10^5.

Pinci, D

2005-01-01T23:59:59.000Z

162

U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated  

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

0: HP-UX System Administration Manager Lets Local Users Gain 0: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges November 17, 2011 - 8:00am Addthis PROBLEM: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges. PLATFORM: HP-UX B.11.11, B.11.23, B.11.31; running Enterprise Mobility Suite (EMS) prior to A.04.20.11.04_01 ABSTRACT: A local user can obtain elevated privileges on the target system. reference LINKS: HP Support Center Document ID: c03089106 CVE-2011-4159 SecurityTracker Alert ID: 1026331 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in HP-UX System Administration Manager. A local user can obtain elevated privileges on the target system. A local user can gain full control of the target system.

163

U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated  

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

40: HP-UX System Administration Manager Lets Local Users Gain 40: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges November 17, 2011 - 8:00am Addthis PROBLEM: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges. PLATFORM: HP-UX B.11.11, B.11.23, B.11.31; running Enterprise Mobility Suite (EMS) prior to A.04.20.11.04_01 ABSTRACT: A local user can obtain elevated privileges on the target system. reference LINKS: HP Support Center Document ID: c03089106 CVE-2011-4159 SecurityTracker Alert ID: 1026331 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in HP-UX System Administration Manager. A local user can obtain elevated privileges on the target system. A local user can gain full control of the target system.

164

Determination of Friction Coefficient in Unconfined Compression of Brain Tissue  

E-Print Network (OSTI)

Unconfined compression tests are more convenient to perform on cylindrical samples of brain tissue than tensile tests in order to estimate mechanical properties of the brain tissue because they allow for homogeneous deformations. The reliability of these tests depends significantly on the amount of friction generated at the specimen/platen interface. Thus, there is a crucial need to find an approximate value of the friction coefficient in order to predict a possible overestimation of stresses during unconfined compression tests. In this study, a combined experimental-computational approach was adopted to estimate the dynamic friction coefficient mu of porcine brain matter against metal platens in compressive tests. Cylindrical samples of porcine brain tissue were tested up to 30% strain at variable strain rates, both under bonded and lubricated conditions in the same controlled environment. It was established that mu was equal to 0.09 +/- 0.03, 0.18 +/- 0.04, 0.18 +/- 0.04 and 0.20 +/- 0.02 at strain rates of...

Rashid, Badar; Gilchrist, Michael; 10.1016/j.jmbbm.2012.05.001

2013-01-01T23:59:59.000Z

165

The Coefficient of Thermal Expansion in PBX 9502  

Office of Scientific and Technical Information (OSTI)

LA-14003 LA-14003 Approved for public release; distribution is unlimited. The Elusive Coefficients of Thermal Expansion in PBX 9502 Editing by Belinda K. Haag, IM-1 Illustrations by J. Phil Putnam, IM-1 Cover Photo: Stacked sheets of TATB exposed by fracture in a consolidated PBX 9502 component. Los Alamos National Laboratory, an affirmative action/ equal opportunity employer, is operated by the University of California for the National Nuclear Security Administration of the US Department of Energy under contract W-7405-ENG-36. This work was prepared as an account of work sponsored by an agency of the United States Government. Neither the Regents of the University of California, the United States Government nor

166

Extended Simulations of Graphene Growth with Updated Rate Coefficients  

DOE Green Energy (OSTI)

New simulations of graphene growth in flame environments are presented. The simulations employ a kinetic Monte Carlo (KMC) algorithm coupled to molecular mechanics (MM) geometry optimization to track individual graphenic species as they evolve. Focus is given to incorporation of five-member rings and resulting curvature and edge defects. The model code has been re-written to be more computationally efficient enabling a larger set of simulations to be run, decreasing stochastic fluctuations in the averaged results. The model also includes updated rate coefficients for graphene edge reactions recently published in the literature. The new simulations are compared to results from the previous model as well as to hydrogen to carbon ratios recorded in experiment and calculated with alternate models.

Whitesides, R; You, X; Frenklach, M

2010-03-18T23:59:59.000Z

167

DRIFT COEFFICIENTS OF CHARGED PARTICLES IN TURBULENT MAGNETIC FIELDS  

Science Conference Proceedings (OSTI)

Using test-particle simulations, the off-diagonal elements of the diffusion tensor are evaluated numerically. The comparison of the so-obtained time-dependent drift coefficients with analytical approximations shows that, for weak turbulence strengths or for slab turbulence geometry, the weak scattering result provides an excellent agreement with the numerical results. For two- or three-dimensional turbulence geometry, however, neither the classical scattering result nor alternative analytical approaches provide an accurate description of the numerically obtained values. Furthermore, the influence is discussed of a non-constant energy range in the turbulence spectrum and of non-static turbulence, for which the time dependence is modeled using magnetohydrodynamic plasma waves.

Tautz, R. C. [Zentrum fuer Astronomie und Astrophysik, Technische Universitaet Berlin, Hardenbergstrasse 36, D-10623 Berlin (Germany); Shalchi, A., E-mail: rct@tp4.rub.de, E-mail: andreasm4@yahoo.com [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)

2012-01-10T23:59:59.000Z

168

Novel Features of the Transport Coefficients in Lifshitz Black Branes  

E-Print Network (OSTI)

We study the transport coefficients, including the conductivities and shear viscosity of the non-relativistic field theory dual to the Lifshitz black brane with multiple U(1) gauge fields by virtue of the gauge/gravity duality. Focusing on the case of double U(1) gauge fields, we systematically investigate the electric, thermal and thermoelectric conductivities for the dual non-relativistic field theory. In the large frequency regime, we find a nontrivial power law behavior in the electric AC conductivity when the dynamical critical exponent z>1 in (2+1)-dimensional field theory. The relations between this novel feature and the `symmetric hopping model' in condensed matter physics are discussed. In addition, we also show that the Kovtun-Starinets-Son bound for the shear viscosity to the entropy density is not violated by the additional U(1) gauge fields and dilaton in the Lifshitz black brane.

Jia-Rui Sun; Shang-Yu Wu; Hai-Qing Zhang

2013-02-21T23:59:59.000Z

169

Characterization of carbon fibers: coefficient of thermal expansion and microstructure  

E-Print Network (OSTI)

The focus of the research is to develop a consistent and repeatable method to evaluate the coefficient of thermal expansion (CTE) of carbon fibers at high temperatures. Accurate measurement of the CTE of carbon fibers is essential to understand and develop optimal processing procedures as well as computational simulations to predict properties and allowables for fiber-reinforced composites. The mismatch between the coefficient of thermal expansion of the fiber and the matrix has a profound impact on the development of residual stresses and the subsequent damage initiation and progression, potentially diminishing the performance of composite structures. In situ transmission electron microscopy (TEM) is selected to perform the experimental work on account of the high resolution and the capability of evaluating both the longitudinal and transverse CTE. The orthotropy in the CTE is tested by rotating the fibers through 45° about their axis. The method is validated by testing standard tungsten filaments of known CTE. Additionally, the microstructure of the fibers is studied in a field emission scanning electron microscope as well as through selected area diffraction patterns in a TEM to observe presence of any potential orthotropy. The pitch based P55 fiber revealed a cylindrically orthotropic microstructure, but the PAN based IM7 and T1000 fibers did not reveal any orthotropy. Finite element models of hexagonally arranged IM7 fibers in a 977 epoxy matrix are developed using PATRAN and analyzed using the commercial FEA code ABAQUS 6.4. The fiber properties were considered temperature independent where as the matrix properties were varied linearly with temperature. The lamina properties evaluated from the finite element modeling are in agreement with the experimental results in literature within 10% in the temperature range of room temperature to the stress free temperature of the epoxy, however at cryogenic temperatures the difference is greater. The residual stresses developed during processing of the composite indicated a potential location for fiber matrix debonding to be in the matrix dominant regions.

Kulkarni, Raghav Shrikant

2004-12-01T23:59:59.000Z

170

Stability Parameters and Wind-Stress Coefficients under Various Atmospheric Conditions  

Science Conference Proceedings (OSTI)

Stability parameters and wind-stress coefficients under various atmospheric conditions are related to wind velocity and air-sea temperature difference. Readily applicable formulae, without iterative computations, of wind-stress coefficients under ...

Jin Wu

1986-06-01T23:59:59.000Z

171

Surface Wind over Tropical Oceans: Diagnosis of the Momentum Balance, and Modeling the Linear Friction Coefficient  

Science Conference Proceedings (OSTI)

Previous diagnostic studies of surface wind momentum balances over tropical oceans showed that, under a linear friction assumption, the meridional friction coefficient is two to three times larger than the zonal friction coefficient, and that ...

John C. H. Chiang; Stephen E. Zebiak

2000-05-01T23:59:59.000Z

172

Condensation Coefficient Measurement for Water in the UMR Cloud Simulation Chamber  

Science Conference Proceedings (OSTI)

A systematic series of condensation coefficient measurements of water have been made using the University of MissouriRolla cooled-wall expansion chamber which simulates the thermodynamics of cloud. This coefficient is seen to decrease from a ...

D. E. Hagen; J. Schmitt; M. Trueblood; J. Carstens; D. R. White; D. J. Alofs

1989-03-01T23:59:59.000Z

173

Wind-Stress coefficients over Sea surface near Neutral ConditionsA Revisit  

Science Conference Proceedings (OSTI)

A scaling law of wind-stress coefficients is presented to illustrate explicitly that the coefficient increases with wind velocity and decreases with fetch; physical reasonings of both trends are discussed. Besides being shown previously to be ...

Jin Wu

1980-05-01T23:59:59.000Z

174

U-142: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain  

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

42: HP Onboard Administrator Bugs Let Remote Users Gain Access, 42: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks U-142: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks April 6, 2012 - 7:00am Addthis PROBLEM: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks PLATFORM: HP Onboard Administrator (OA) up to and including v3.32 ABSTRACT: A remote user can obtain potentially sensitive information. reference LINKS: HP Support Document ID: c03263573 SecurityTracker Alert ID: 1026889 CVE-2012-0128, CVE-2012-0129, CVE-2012-0130 IMPACT ASSESSMENT: High Discussion: Several vulnerabilities were reported in HP Onboard Administrator. A remote

175

T-601: Windows Kernel win32k.sys Lets Local Users Gain Elevated Privileges  

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

01: Windows Kernel win32k.sys Lets Local Users Gain Elevated 01: Windows Kernel win32k.sys Lets Local Users Gain Elevated Privileges T-601: Windows Kernel win32k.sys Lets Local Users Gain Elevated Privileges April 13, 2011 - 5:12am Addthis PROBLEM: Windows Kernel win32k.sys Lets Local Users Gain Elevated Privileges PLATFORM: Windows XP Service Pack 3, Windows XP Professional x64 Edition Service Pack 2, Windows Server 2003 Service Pack 2, Windows Server 2003 x64 Edition Service Pack 2, Windows Server 2003 with SP2 for Itanium-based Systems, Windows Vista Service Pack 1 and Windows Vista Service Pack 2, Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2, Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*, Windows Server 2008 for x64-based Systems

176

V-063: Adobe ColdFusion Bugs Let Remote Users Gain Access and Obtain  

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

3: Adobe ColdFusion Bugs Let Remote Users Gain Access and 3: Adobe ColdFusion Bugs Let Remote Users Gain Access and Obtain Information V-063: Adobe ColdFusion Bugs Let Remote Users Gain Access and Obtain Information January 7, 2013 - 1:00am Addthis PROBLEM: Adobe ColdFusion Bugs Let Remote Users Gain Access and Obtain Information PLATFORM: ColdFusion 10, 9.0.2, 9.0.1 and 9.0 for Windows, Macintosh and UNIX ABSTRACT: Adobe has identified three vulnerabilities affecting ColdFusion for Windows, Macintosh and UNIX REFERENCE LINKS: Adobe Security Bulletin APSA13-01 SecurityTracker Alert ID: 1027938 CVE-2013-0625 CVE-2013-0629 CVE-2013-0631 IMPACT ASSESSMENT: High DISCUSSION: A remote user can bypass authentication and take control of the target system [CVE-2013-0625]. Systems with password protection disabled or with no password set are affected.

177

DOE Challenge Home Gaining Recognition as a Leader Webinar (Text Version) |  

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

Home Gaining Recognition as a Leader Webinar (Text Home Gaining Recognition as a Leader Webinar (Text Version) DOE Challenge Home Gaining Recognition as a Leader Webinar (Text Version) Below is a text version of the webinar titled "Gaining Recognition as a Leader," originally presented in May 2013. In addition to this text version of the audio, you can access a recording of the webinar. Sam Rashkin: Slide 1: This is about the DOE Challenge Home as a way for builders to be recognized a leader. Eventually Challenge Home is promoting zero energy ready homes across the country. I believe the business model that we're kinda tapping into is the old Apple business model, which is, they build products people didn't know they wanted but have to have when they try them. We believe zero energy ready homes are homes people have to have once they try them.

178

U-142: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain  

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

2: HP Onboard Administrator Bugs Let Remote Users Gain Access, 2: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks U-142: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks April 6, 2012 - 7:00am Addthis PROBLEM: HP Onboard Administrator Bugs Let Remote Users Gain Access, Obtain Information, and Conduct URL Redirection Attacks PLATFORM: HP Onboard Administrator (OA) up to and including v3.32 ABSTRACT: A remote user can obtain potentially sensitive information. reference LINKS: HP Support Document ID: c03263573 SecurityTracker Alert ID: 1026889 CVE-2012-0128, CVE-2012-0129, CVE-2012-0130 IMPACT ASSESSMENT: High Discussion: Several vulnerabilities were reported in HP Onboard Administrator. A remote

179

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

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

84: Cisco Digital Media Manager Lets Remote Authenticated Users 84: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

180

T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges  

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

1: Red Hat system-config-firewall Lets Local Users Gain Root 1: Red Hat system-config-firewall Lets Local Users Gain Root Privileges T-671: Red Hat system-config-firewall Lets Local Users Gain Root Privileges July 19, 2011 - 2:42pm Addthis PROBLEM: A vulnerability was reported in Red Hat system-config-firewall. A local user can obtain root privileges on the target system. PLATFORM Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Server EUS (v. 6.1.z) Red Hat Enterprise Linux Workstation (v. 6) ABSTRACT: Red Hat system-config-firewall Lets Local Users Gain Root Privileges reference LINKS: RHSA-2011:0953-1 SecurityTracker Alert ID: 1025793 CVE-2011-2520 Red hat Article ID: 11259 IMPACT ASSESSMENT: Medium Discussion: The system-config-firewall utility uses the Python pickle module in an

Note: This page contains sample records for the topic "gain coefficient cxs" 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

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

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

4: Cisco Digital Media Manager Lets Remote Authenticated Users 4: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

182

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

E-Print Network (OSTI)

estimate solar heat gains in the cooling and heatingof E891BN solar irradiance economic value of annual heatingglobal solar re?ectance, ? R summer , and that the heating

Levinson, Ronnen

2010-01-01T23:59:59.000Z

183

High gain proportional rf control stability at TESLA cavities Elmar Vogel  

E-Print Network (OSTI)

High gain proportional rf control stability at TESLA cavities Elmar Vogel Deutsches Elektronen) based on TESLA technology. Additional control loops improve the field regulation by treating repetitive loops is desirable for the strong suppression of nonpredictive and nonrepetitive disturbances. TESLA

184

U-056: Linux Kernel HFS Buffer Overflow Lets Local Users Gain Root  

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

6: Linux Kernel HFS Buffer Overflow Lets Local Users Gain Root 6: Linux Kernel HFS Buffer Overflow Lets Local Users Gain Root Privileges U-056: Linux Kernel HFS Buffer Overflow Lets Local Users Gain Root Privileges December 9, 2011 - 8:00am Addthis PROBLEM: Linux Kernel HFS Buffer Overflow Lets Local Users Gain Root Privileges. PLATFORM: Linux kernel ABSTRACT: A vulnerability was reported in the Linux Kernel. reference LINKS: The Linux Kernel Archives SecurityTracker Alert ID: 1026395 CVE-2011-4330 IMPACT ASSESSMENT: Medium Discussion: When a specially crafted Hierarchical File System (HFS) file system is mounted, a local user can to trigger a buffer overflow and execute arbitrary code on the target system with root privileges. The vulnerability resides in the hfs_mac2asc() function. Impact: A local user can obtain root privileges on the target system.

185

T-591: VMware vmrun Utility Lets Local Users Gain Elevated Privileges |  

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

1: VMware vmrun Utility Lets Local Users Gain Elevated 1: VMware vmrun Utility Lets Local Users Gain Elevated Privileges T-591: VMware vmrun Utility Lets Local Users Gain Elevated Privileges March 30, 2011 - 3:05pm Addthis PROBLEM: A vulnerability was reported in VMware. A local user can obtain elevated privileges on the target system. PLATFORM: VMware Workstation 6.5.5 and 7.1.3 and prior; VIX API for Linux 1.10.2 and prior ABSTRACT: The VMware vmrun utility is susceptible to a local privilege escalation in non-standard configurations. reference LINKS: VM Advisory ID:VMSA-2011-0006 Secunia Advisory: SA43885 SecurityTracker Alert ID: 1025270 CVE-2011-1126 VM Post IMPACT ASSESSMENT: Medium Discussion: A security issue has been reported in VMware Workstation, which can be exploited by malicious, local users to gain potentially escalated

186

V-093: Symantec PGP Desktop Buffer Overflows Let Local Users Gain Elevated  

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

3: Symantec PGP Desktop Buffer Overflows Let Local Users Gain 3: Symantec PGP Desktop Buffer Overflows Let Local Users Gain Elevated Privileges V-093: Symantec PGP Desktop Buffer Overflows Let Local Users Gain Elevated Privileges February 18, 2013 - 12:53am Addthis PROBLEM: Symantec PGP Desktop Buffer Overflows Let Local Users Gain Elevated Privileges PLATFORM: Symantec PGP Desktop 10.2.x,10.1.x,10.0.x Symantec Encryption Desktop 10.3.0 ABSTRACT: Two vulnerabilities were reported in Symantec PGP Desktop. REFERENCE LINKS: Symantec Security Advisory SYM13-001 Bugtraq ID: 57170 SecurityTracker Alert ID: 1028145 CVE-2012-4351 CVE-2012-4352 IMPACT ASSESSMENT: Medium DISCUSSION: A local user can trigger an integer overflow in 'pgpwded.sys' to execute arbitrary code on the target system [CVE-2012-4351]. On Windows XP and Windows Sever 2003, a local user can trigger a buffer

187

V-218: HP Service Manager Unspecified Flaw Lets Remote Users Gain  

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

8: HP Service Manager Unspecified Flaw Lets Remote Users Gain 8: HP Service Manager Unspecified Flaw Lets Remote Users Gain Unauthorized Access V-218: HP Service Manager Unspecified Flaw Lets Remote Users Gain Unauthorized Access August 15, 2013 - 1:30am Addthis PROBLEM: A potential security vulnerability has been identified with HP Service Manager. The vulnerability could be exploited to allow remote unauthenticated access and elevation of privilege. PLATFORM: HP Service Manager v9.31, v9.30, v9.21, v7.11, v6.2.8 ABSTRACT: The vulnerabilities are reported in versions 9.31 and prior. REFERENCE LINKS: SecurityTracker Alert ID: 1028912 CVE-2013-4808 IMPACT ASSESSMENT: High DISCUSSION: A vulnerability was reported in HP Service Manager. A remote user can gain unauthorized access on the target system. IMPACT: User access via network

188

V-218: HP Service Manager Unspecified Flaw Lets Remote Users Gain  

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

8: HP Service Manager Unspecified Flaw Lets Remote Users Gain 8: HP Service Manager Unspecified Flaw Lets Remote Users Gain Unauthorized Access V-218: HP Service Manager Unspecified Flaw Lets Remote Users Gain Unauthorized Access August 15, 2013 - 1:30am Addthis PROBLEM: A potential security vulnerability has been identified with HP Service Manager. The vulnerability could be exploited to allow remote unauthenticated access and elevation of privilege. PLATFORM: HP Service Manager v9.31, v9.30, v9.21, v7.11, v6.2.8 ABSTRACT: The vulnerabilities are reported in versions 9.31 and prior. REFERENCE LINKS: SecurityTracker Alert ID: 1028912 CVE-2013-4808 IMPACT ASSESSMENT: High DISCUSSION: A vulnerability was reported in HP Service Manager. A remote user can gain unauthorized access on the target system. IMPACT: User access via network

189

U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated  

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

8:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated 8:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges December 23, 2011 - 8:45am Addthis PROBLEM: Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges PLATFORM: Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Server AUS (v. 6.2) Red Hat Enterprise Linux Server EUS (v. 6.2.z) Red Hat Enterprise Linux Workstation (v. 6) ABSTRACT: A local privileged user on the guest operating system can obtain elevated privileges on the target system. reference LINKS: Red Hat kernel security and bug fix update SecurityTracker Alert ID: 1026453 SecurityTracker Alert ID: 1026454

190

T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated  

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

3: Red Hat Directory Server Bugs Let Local Users Gain Elevated 3: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service February 23, 2011 - 7:00am Addthis PROBLEM: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service. PLATFORM: Red Hat Directory Server v8 EL4, Red Hat Directory Server v8 EL5 ABSTRACT: Several vulnerabilities were reported in Red Hat Directory Server. A local user can obtain elevated privileges on the target system. A remote user can cause denial of service conditions. A local user can cause denial of service conditions. A remote user can send multiple simple paged search requests to cause the

191

V-063: Adobe ColdFusion Bugs Let Remote Users Gain Access and...  

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

Gain Access and Obtain Information PLATFORM: ColdFusion 10, 9.0.2, 9.0.1 and 9.0 for Windows, Macintosh and UNIX ABSTRACT: Adobe has identified three vulnerabilities affecting...

192

Large inherent optical gain from the direct gap transition of Ge thin films  

E-Print Network (OSTI)

The recent demonstration of Ge-on-Si diode lasers renews the interest in the unique carrier dynamics of Ge involving both direct (?) and indirect (L) valleys. Here, we report a large inherent direct gap optical gain ...

Wang, Xiaoxin

193

Spend a semester in Indonesia to gain linguistic and classroom competence!  

E-Print Network (OSTI)

Spend a semester in Indonesia to gain linguistic and classroom competence! Study in Indonesia institu- tions throughout Indonesia since 1994, offering a range of study options and in-country support

194

A Low Power, Low Voltage, Fully Differential CMOS Variable Gain Amplifier.  

E-Print Network (OSTI)

?? This research presents a low voltage (0.8 V) fully differential CMOS variable gain amplifier. SPECTRE simulations on the designed amplifier show a -17 dB (more)

Siddiqui, Muhammad Yousuf

2011-01-01T23:59:59.000Z

195

Complexity within the Air Force acquisition system gaining insight from a theory of collapse  

E-Print Network (OSTI)

Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both ...

Marticello, Daniel Nicholas, Jr

2012-01-01T23:59:59.000Z

196

Potential efficiency gains in the construction industry from the proper use of information technology  

E-Print Network (OSTI)

For many years, technological advances and new software have altered the face of the engineering design sector. Design companies have realized incredible efficiency gains and cost savings due to these improvements, but the ...

Hsu, Roberta L

2006-01-01T23:59:59.000Z

197

Test Point Selections for a Programmable Gain Amplifier Using NIST and Wavelet Transform Methods  

Science Conference Proceedings (OSTI)

Test point selections for a programmable gain amplifier (PGA) using the National Institute of Standard (NIST) and wavelet transform methods are investigated. Although the wavelet transform method is an efficient method in test point selection for many ...

Xinsong Zhang; Simon S. Ang; Chandra Carter

2007-10-01T23:59:59.000Z

198

Duct Systems in large commercial buildings: Physical characterization, air leakage, and heat conduction gains  

E-Print Network (OSTI)

Air Leakage, and Heat Conduction Gains William 1. Fisk,0.75 to 0.90; thus, heat conduction decreased the coolingby air leakage or heat conduction, because these ducts are

Fisk, W.J.

2011-01-01T23:59:59.000Z

199

Optical gain and lasing from band-engineered Ge-on-Si at room temperature  

E-Print Network (OSTI)

We present theoretical modeling and experimental results of optical gain and lasing from tensile-strained, n[superscript +] Ge-on-Si at room temperature. Compatible with silicon CMOS, these devices are ideal for large-scale ...

Liu, Jifeng

200

Annual Heat Gain of the Tropical Atlantic Computed from Subsurface Ocean Data  

Science Conference Proceedings (OSTI)

Charts are presented which show the seasonal and annual rates of heat gain of the tropical North Atlantic Ocean. These rates have been computed using subsurface oceanographic data and wind-stress data. In these computations the interseasonal ...

David W. Behringer; Henry Stommel

1981-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Diffusion thermique de l'uranium dans le zirconium. Application au stockage des gaines de combustible  

E-Print Network (OSTI)

Diffusion thermique de l'uranium dans le zirconium. Application au stockage des gaines de. De plus le dépôt d'énergie des produits de fission entraîne la pulvérisation de l'uranium et, au fur refroidis 5 ans, montrent que l'uranium et les actinides sont répartis uniformément dans la gaine. Nous

Paris-Sud XI, Université de

202

Gain media edge treatment to suppress amplified spontaneous emission in a high power laser  

DOE Patents (OSTI)

A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges using a substantially high index bonding elastomer or epoxy to a predetermined electromagnetic absorbing arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE and parasitic oscillation modes can be effectively suppressed.

Hackel, Lloyd A. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Fochs, Scott N. (Livermore, CA); Rotter, Mark D. (San Ramon, CA); Letts, Stephan A. (San Ramon, CA)

2008-12-09T23:59:59.000Z

203

Scaling of the normal coefficient of restitution for wet impacts  

E-Print Network (OSTI)

A thorough understanding of the energy dissipation in the dynamics of wet granular matter is essential for a continuum description of natural phenomena such as debris flow, and the development of various industrial applications such as the granulation process. The coefficient of restitution (COR), defined as the ratio between the relative rebound and impact velocities of a binary impact, is frequently used to characterize the amount of energy dissipation associated. We measure the COR by tracing a freely falling sphere bouncing on a wet surface with the liquid film thickness monitored optically. For fixed ratio between the film thickness and the particle size, the dependence of the COR on the impact velocity and various properties of the liquid film can be characterized with the Stokes number, defined as the ratio between the inertia of the particle and the viscosity of the liquid. Moreover, the COR for infinitely large impact velocities derived from the scaling can be analyzed by a model considering the energy dissipation from the inertia of the liquid film.

Thomas Mueller; Frank Gollwitzer; Christof Kruelle; Ingo Rehberg; Kai Huang

2013-01-23T23:59:59.000Z

204

Transport Coefficient of Gluon Plasma from Lattice QCD  

E-Print Network (OSTI)

In this report we present our calculation of the transport coefficient of gluon system on $24^3\\times 8$ lattice in the quench approximation. Simulations are carried out in the range, $1.4 \\le T/T_c \\le 24$. In the temperature region slightly above the transition, where the perturbative calculation is not applicable, the shear viscosity($\\eta$) is smaller than typical hadron masses. The bulk viscosity is consistent with zero within the range of error bars in $1.4 \\le T/T_c \\le 24$. We compare our results with the perturbative calculations in large $T/T_c$ region. It is found that the lattice and perturbative results are consistent with each other there. The ratio $\\eta/s$ is around $0.1-0.4$ in $T/T_c < 3$ region and satisfies the KSS bound\\cite{KSS}. In order to estimate the contribution from high frequency part of the spectral function, we study the effects of a term $\\rho^{high}$ proposed by Aarts and Resco\\cite{Aarts}. It is found that until the threshold mass becomes small, its effect is quite small, and that viscosity decreases as the threshold decreases. From these studies we think that although our result is obtained under an assumptions for the spectral function, it gives a reasonable estimation for $\\eta$($=\\pi d\\rho/d\\omega$ at $\\omega=0$), and qualitative results will not be changed when the accurate spectral function is obtained.

Sunao Sakai; Atsushi Nakamura

2005-10-24T23:59:59.000Z

205

A new method for predicting the solar heat gain of complex fenestration systems: 1, Overview and derivation of the matrix Layer calculation  

SciTech Connect

A new method of predicting the solar heat gain through complex fenestration systems involving nonspecular layers such as shades or blinds has been examined in a project jointly sponsored by ASHRAE and DOE. In this method, a scanning radiometer is used to measure the bidirectional radiative transmittance and reflectance of each layer of a fenestration system. The properties of systems containing these layers are then built up computationally from the measured layer properties using a transmission/multiple-reflection calculation. The calculation produces the total directional-hemispherical transmittance of the fenestration system and the layer-by-layer absorptances. These properties are in turn combined with layer-specific measurements of the inward-flowing fractions of absorbed solar energy to produce the overall solar heat gain coefficient. In this first in a series of related papers describing the project, the assumptions and limitations of the calculation method are described and the derivation of the matrix calculation technique from the initial integral equations is presented.

Klems, J.H.

1993-10-01T23:59:59.000Z

206

Uncertainties in Cancer Risk Coefficients for Environmental Exposure to Radionuclides. An Uncertainty Analysis for Risk Coefficients Reported in Federal Guidance Report No. 13  

Science Conference Proceedings (OSTI)

Federal Guidance Report No. 13 (FGR 13) provides risk coefficients for estimation of the risk of cancer due to low-level exposure to each of more than 800 radionuclides. Uncertainties in risk coefficients were quantified in FGR 13 for 33 cases (exposure to each of 11 radionuclides by each of three exposure pathways) on the basis of sensitivity analyses in which various combinations of plausible biokinetic, dosimetric, and radiation risk models were used to generate alternative risk coefficients. The present report updates the uncertainty analysis in FGR 13 for the cases of inhalation and ingestion of radionuclides and expands the analysis to all radionuclides addressed in that report. The analysis indicates that most risk coefficients for inhalation or ingestion of radionuclides are determined within a factor of 5 or less by current information. That is, application of alternate plausible biokinetic and dosimetric models and radiation risk models (based on the linear, no-threshold hypothesis with an adjustment for the dose and dose rate effectiveness factor) is unlikely to change these coefficients by more than a factor of 5. In this analysis the assessed uncertainty in the radiation risk model was found to be the main determinant of the uncertainty category for most risk coefficients, but conclusions concerning the relative contributions of risk and dose models to the total uncertainty in a risk coefficient may depend strongly on the method of assessing uncertainties in the risk model.

Pawel, David [U.S. Environmental Protection Agency; Leggett, Richard Wayne [ORNL; Eckerman, Keith F [ORNL; Nelson, Christopher [U.S. Environmental Protection Agency

2007-01-01T23:59:59.000Z

207

Spatially Similar Practice Immediately Following Motor Sequence Learning Eliminates Offline Gains  

E-Print Network (OSTI)

Robust offline performance gains, beyond those that would be anticipated by being exposed to additional physical practice, have been reported during procedural learning. However, practice of unrelated procedural task performance within 4-6 hour after initial practice has been revealed to eliminate offline improvement. The present experiment assessed the relative impact of experiencing supplemental practice of a spatially or a motorically-similar procedural task immediately following practice of a target motor sequence task. Based on a contemporary model of procedural skill acquisition forwarded by Hikosaka and colleagues, we assumed exposure to a spatial compatible motor sequence rather than interfering would support rapid improvement in the production of the spatial variant of the target task without compromising important memory processes, which are conducted offline to improve delayed performance of the target task. Findings revealed the often demonstrated offline gain when the target task was performed in the absence of interfering task practice as well as the elimination of such gains when target task practice was followed with additional practice of either a novel or motorically-similar motor sequence task. While immediate performance of the spatially-similar task was facilitated by preceding target task training, offline gains for the target task no longer emerged. These data are consistent with a central premise of Hikosaka et al.s model that a spatial reference system plays an important role early during motor sequence learning but highlight the sensitivity of offline gains to task practice order.

Handa, Atul

2012-12-01T23:59:59.000Z

208

V-156: Linux Kernel Array Bounds Checking Flaw Lets Local Users Gain  

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

6: Linux Kernel Array Bounds Checking Flaw Lets Local Users 6: Linux Kernel Array Bounds Checking Flaw Lets Local Users Gain Elevated Privileges V-156: Linux Kernel Array Bounds Checking Flaw Lets Local Users Gain Elevated Privileges May 15, 2013 - 12:19am Addthis PROBLEM: Linux Kernel Array Bounds Checking Flaw Lets Local Users Gain Elevated Privileges PLATFORM: Version(s): 2.6.37 to 3.8.9 ABSTRACT: A vulnerability was reported in the Linux Kernel. REFERENCE LINKS: Linux Kernel SecurityTracker Alert ID: 1028565 CVE-2013-2094 IMPACT ASSESSMENT: Medium DISCUSSION: On systems compiled with PERF_EVENTS support, a local user can supply a specially crafted perf_event_open() call to execute arbitrary code on the target system with root privileges. The vulnerability resides in the perf_swevent_init() function in 'kernel/events/core.c'.

209

New Projects Set to Target Efficiency, Environmental Gains at Advanced Coal  

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

Projects Set to Target Efficiency, Environmental Gains at Projects Set to Target Efficiency, Environmental Gains at Advanced Coal Gasification Facilities New Projects Set to Target Efficiency, Environmental Gains at Advanced Coal Gasification Facilities July 27, 2010 - 1:00pm Addthis Washington, D.C. -- Four projects that will demonstrate an innovative technology that could eventually enhance hydrogen fuel production, lower greenhouse gas (GHG) emissions, improve efficiencies and lower consumer electricity costs from advanced coal gasification power systems have been selected by the U.S. Department of Energy (DOE). The projects will test membrane technology to separate hydrogen and carbon dioxide (CO2) from coal or coal/biomass-derived synthesis gas (syngas), such as from Integrated Gasification Combined Cycle (IGCC) power systems.

210

U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges |  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated 2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis PROBLEM: A vulnerability was reported in Sudo. A local user can obtain elevated privileges on the target system. PLATFORM: Linux (Any) Version(s): 1.8.0 - 1.8.3p1 ABSTRACT: A local user can supply a specially crafted command line argument to trigger a format string flaw and execute arbitrary commands on the target system with root privileges. reference LINKS: CVE-2012-0809 SecurityTracker Alert ID: 1026600 Vendor Site IMPACT ASSESSMENT: Medium Discussion: The vulnerability resides in the sudo_debug() function in 'src/sudo.c'. This can be exploited by local users, regardless of whether they are listed

211

Hanford's Robust Safety Culture Gains One More Site-Wide Safety Standard  

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

Robust Safety Culture Gains One More Site-Wide Safety Robust Safety Culture Gains One More Site-Wide Safety Standard Hanford's Robust Safety Culture Gains One More Site-Wide Safety Standard August 2, 2012 - 12:00pm Addthis Media Contacts Michael Turner, MSA Michael_J_Turner@rl.gov 509-376-2872 Cameron Hardy, DOE Cameron.Hardy@rl.doe.gov 509-376-5365 RICHLAND, Wash. - The safety of the Hanford Site workforce has been bolstered with another program added to the list of Site-wide Safety Standards. The latest Site-wide Safety Standard covers Fall Protection. The innovative Hanford Site-wide Safety Standards program combines the once diverse programs of the various site contractors, and streamlines them into a single safety program. Designed to improve the safety of Hanford's mobile workforce, the Site-wide Safety Standards effort has incorporated the best practices from

212

U-059: Blackberry PlayBook File Sharing Option Lets Local Users Gain  

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

9: Blackberry PlayBook File Sharing Option Lets Local Users 9: Blackberry PlayBook File Sharing Option Lets Local Users Gain Elevated Privileges U-059: Blackberry PlayBook File Sharing Option Lets Local Users Gain Elevated Privileges December 13, 2011 - 6:00am Addthis PROBLEM: Blackberry PlayBook File Sharing Option Lets Local Users Gain Elevated Privileges. PLATFORM: BlackBerry PlayBook tablet software version 1.0.8.4985 and earlier ABSTRACT: A local user can obtain root privileges on the target tablet system. reference LINKS: SecurityTracker Alert ID:1026386 Vulnerability Summary for CVE-2011-0291 BlackBerry Technical Solution Center IMPACT ASSESSMENT: High Discussion: A vulnerability was reported in Blackberry PlayBook. A local user can obtain elevated privileges on the target system. On a tablet with File Sharing enabled and connected via USB to a system running BlackBerry

213

Gain Time Reclaiming in High Performance Real-Time Java Systems  

E-Print Network (OSTI)

The run-time characteristics of Java, such as high frequency of method invocation, dynamic dispatching and dynamic loading, make Java more difficult than other object-oriented programming languages, such as C++, for conducting Worst-Case Execution Time (WCET) analysis. To offer a more flexible way to develop object-oriented real-time applications in the realtime Java environment without loss of predicability and performance, we propose a novel gain time reclaiming framework integrated with WCET analysis. This paper demonstrates how to improve the utilisation and performance of the whole system by reclaiming gain time at run-time. Our approach shows that integrating WCET with gain time reclaiming can not only provide a more flexible environment, but it also does not necessarily result in unsafe or unpredictable timing behaviour.

Erik Yu-Shing Hu; Andy Wellings; Guillem Bernat

2003-01-01T23:59:59.000Z

214

U-094: EMC Documentum Content Server Lets Local Administrative Users Gain  

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

4: EMC Documentum Content Server Lets Local Administrative 4: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges February 2, 2012 - 9:15am Addthis PROBLEM: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges PLATFORM: EMC Documentum Content Server 6.0, 6.5, 6.6 ABSTRACT: EMC Documentum Content Server contains a privilege elevation vulnerability that may allow an unauthorized user to obtain highest administrative privileges on the system. reference LINKS: SecurityTracker Alert ID: 1026624 EMC Resource Library CVE-2011-4144 bugtraq ESA-2012-009 IMPACT ASSESSMENT: Medium Discussion: EMC Documentum Content Server contains a security vulnerability that may allow a system administrator to elevate their or other users privileges to

215

Fuel Cycle Analysis Framework Base Cases for the IAEA/INPRO GAINS Collaborative Project  

SciTech Connect

Thirteen countries participated in the Collaborative Project GAINS Global Architecture of Innovative Nuclear Energy Systems Based on Thermal and Fast Reactors Including a Closed Fuel Cycle, which was the primary activity within the IAEA/INPRO Program Area B: Global Vision on Sustainable Nuclear Energy for the last three years. The overall objective of GAINS was to develop a standard framework for assessing future nuclear energy systems taking into account sustainable development, and to validate results through sample analyses. This paper details the eight scenarios that constitute the GAINS framework base cases for analysis of the transition to future innovative nuclear energy systems. The framework base cases provide a reference for users of the framework to start from in developing and assessing their own alternate systems. Each base case is described along with performance results against the GAINS sustainability evaluation metrics. The eight cases include four using a moderate growth projection and four using a high growth projection for global nuclear electricity generation through 2100. The cases are divided into two sets, addressing homogeneous and heterogeneous scenarios developed by GAINS to model global fuel cycle strategies. The heterogeneous world scenario considers three separate nuclear groups based on their fuel cycle strategies, with non-synergistic and synergistic cases. The framework base case analyses results show the impact of these different fuel cycle strategies while providing references for future users of the GAINS framework. A large number of scenario alterations are possible and can be used to assess different strategies, different technologies, and different assumptions about possible futures of nuclear power. Results can be compared to the framework base cases to assess where these alternate cases perform differently versus the sustainability indicators.

Brent Dixon

2012-09-01T23:59:59.000Z

216

TEMPERATURE COEFFICIENTS FOR PV MODULES AND ARRAYS: MEASUREMENT METHODS, DIFFICULTIES, AND RESULTS  

Office of Scientific and Technical Information (OSTI)

TEMPERATURE COEFFICIENTS FOR PV MODULES AND ARRAYS: TEMPERATURE COEFFICIENTS FOR PV MODULES AND ARRAYS: MEASUREMENT METHODS, DIFFICULTIES, AND RESULTS David L. King, Jay A. Kratochvil, and William E. Boyson Sandia National Laboratories, Albuquerque, NM 0 ABSTRACT The term "temperature coefficient" has been applied to several different photovoltaic performance parameters, including voltage, current, and power. The procedures for measuring the coefficient(s) for modules and arrays are not yet standardized, and systematic influences are common in the test methods used to measure them. There are also misconceptions regarding their application. Yet, temperature coefficients, however obtained, play an important role in PV system design and sizing, where often the worst case operating condition dictates the array

217

Direct-conversion flat-panel imager with avalanche gain: Feasibility investigation for HARP-AMFPI  

Science Conference Proceedings (OSTI)

The authors are investigating the concept of a direct-conversion flat-panel imager with avalanche gain for low-dose x-ray imaging. It consists of an amorphous selenium (a-Se) photoconductor partitioned into a thick drift region for x-ray-to-charge conversion and a relatively thin region called high-gain avalanche rushing photoconductor (HARP) in which the charge undergoes avalanche multiplication. An active matrix of thin film transistors is used to read out the electronic image. The authors call the proposed imager HARP active matrix flat panel imager (HARP-AMFPI). The key advantages of HARP-AMFPI are its high spatial resolution, owing to the direct-conversion a-Se layer, and its programmable avalanche gain, which can be enabled during low dose fluoroscopy to overcome electronic noise and disabled during high dose radiography to prevent saturation of the detector elements. This article investigates key design considerations for HARP-AMFPI. The effects of electronic noise on the imaging performance of HARP-AMFPI were modeled theoretically and system parameters were optimized for radiography and fluoroscopy. The following imager properties were determined as a function of avalanche gain: (1) the spatial frequency dependent detective quantum efficiency; (2) fill factor; (3) dynamic range and linearity; and (4) gain nonuniformities resulting from electric field strength nonuniformities. The authors results showed that avalanche gains of 5 and 20 enable x-ray quantum noise limited performance throughout the entire exposure range in radiography and fluoroscopy, respectively. It was shown that HARP-AMFPI can provide the required gain while maintaining a 100% effective fill factor and a piecewise dynamic range over five orders of magnitude (10{sup -7}-10{sup -2} R/frame). The authors have also shown that imaging performance is not significantly affected by the following: electric field strength nonuniformities, avalanche noise for x-ray energies above 1 keV and direct interaction of x rays in the gain region. Thus, HARP-AMFPI is a promising flat-panel imager structure that enables high-resolution fully quantum noise limited x-ray imaging over a wide exposure range.

Wronski, M. M.; Rowlands, J. A. [Imaging Research, Sunnybrook Health Sciences Centre, Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada)

2008-12-15T23:59:59.000Z

218

Transport coefficients of D1-D5-P system and the membrane paradigm  

E-Print Network (OSTI)

I discuss a correspondence between string theory and the black hole membrane paradigm in the context of the D1-D5-P system. By using the Kubo formula, I calculate transport coefficients of the effective string model induced by two kinds of minimal scalars. Then, I show that these transport coefficients exactly agree with the corresponding membrane transport coefficients of a five-dimensional near-extremal black hole with three charges.

Yuya Sasai

2011-10-19T23:59:59.000Z

219

Basis and implications of the CAP88 age-specific dose coefficients  

Science Conference Proceedings (OSTI)

Recent versions of CAP88 incorporate age-specific dose coefficients based on biokinetic and dosimetric models applied in Federal Guidance Report 13, Cancer Risk Coefficients for Environmental Exposure to Radionuclides (EPA 1999). With a few exceptions the models are those recommended in a series of reports by the International Commission on Radiological Protection (ICRP) on estimation of doses to the public from environmental radionuclides. This paper describes the basis for the ICRP s age-specific biokinetic and dosimetric models and examines differences with age in the derived dose coefficients and in estimates of dose per unit exposure based on those coefficients.

Leggett, Richard Wayne [ORNL; Scofield, Patricia A [ORNL; Eckerman, Keith F [ORNL

2013-01-01T23:59:59.000Z

220

Experimental study of rotordynamic coefficients of squeeze film dampers of an aircraft gas turbine engine.  

E-Print Network (OSTI)

??The rotordynamic coefficients of squeeze film dampers of an aircraft gas turbine engine were investigated experimentally. Rotordynamic model(XLROTOR) for Gas Generator and Power Turbine were (more)

Na, Uhn Joo

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

WORKER INHALATION DOSE COEFFICIENTS FOR RADIONUCLIDES NOT PREVIOUSLY IDENTIFIED IN ICRP PUBLICATION 68  

Science Conference Proceedings (OSTI)

While inhalation dose coefficients are provided for about 800 radionuclides in International Commission on Radiological Protection (ICRP) Publication 68, many radionuclides of practical dosimetric interest for facilities such as high-energy proton accelerators are not specifically addressed, nor are organ-specific dose coefficients tabulated. The ICRP Publication 68 methodology is used, along with updated radiological decay data and metabolic data, to identify committed equivalent dose coefficients [hT(50)] and committed effective dose coefficients [e(50)] for radionuclides produced at the Oak Ridge National Laboratory s Spallation Neutron Source.

McLaughlin, David A [ORNL; Schwahn, Scott O [ORNL

2011-01-01T23:59:59.000Z

222

THERMODYNAMICS OF ELECTROLYTES. X. ENTHALPY AND THE EFFECT OF TEMPERATURE ON THE ACTIVITY COEFFICIENTS.  

E-Print Network (OSTI)

09 THERMODYNAMICS OFELECI'ROLYTES. X'rights. r'-" e. ct THERMODYNAMICS OF ELECTROLYTES. X.Coefficient, Electrolyte, Thermodynamics v ~p , I J ! l

Silvester, Leonard F.

2011-01-01T23:59:59.000Z

223

Polarization dependence of the absorption coefficient for an array of strained quantum wires  

Science Conference Proceedings (OSTI)

The polarization dependence of the absorption coefficient for compressively and tensilely strained quantum wires is investigated as a function of strain

Igor Vurgaftman; Jasprit Singh

1995-01-01T23:59:59.000Z

224

Measuring solar reflectance - Part I: Defining a metric that accurately predicts solar heat gain  

Science Conference Proceedings (OSTI)

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective ''cool colored'' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland US latitudes, this metric R{sub E891BN} can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {roofs in a building energy simulation can exaggerate the economic value N of annual cool roof net energy savings by as much as 23%. We define clear sky air mass one global horizontal (''AM1GH'') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer. (author)

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul [Heat Island Group, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)

2010-09-15T23:59:59.000Z

225

Evaluation of dead time and gain shift correction for a liquid scintillation spectrometer  

SciTech Connect

The Department of Nuclear Engineering at Texas A and M University purchased a new generation liquid scintillation spectrometer--the LKB-Wallac Spectral Model 1219 in 1986. The Model 1219 features an auto sample changer with a capacity for 300 samples, and energy range of 1 to 2000 keV beta subdivided into 1024 channels, a Ra-226 external quench-correction standard, automatic dead time correction, and LED display of the beta energy spectrum. Gain stabilization is based on the use of a precision pulsed light-emitting diode (LED). The instrument's circuitry monitors the pulse height of the light emitted by the LED and adjusted the system gain as necessary to keep the LED-induced pulses constant, thus compensating for gain shifts. This paper reports that a simple test was devised to evaluate this liquid scintillation spectrometer's dead time correction and gain stabilization features. At the same time, the effectiveness of the counting chamber shielding was also tested for a specific situation.

McLain, M.E.; Grimes, M.J.; Lee, P.J.T. (Dept. of Nuclear Engineering, Texas A and M Univ., College Station, TX (US))

1987-09-01T23:59:59.000Z

226

U-178: VMware vMA Library Loading Error Lets Local Users Gain Elevated  

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

8: VMware vMA Library Loading Error Lets Local Users Gain 8: VMware vMA Library Loading Error Lets Local Users Gain Elevated Privileges U-178: VMware vMA Library Loading Error Lets Local Users Gain Elevated Privileges May 29, 2012 - 7:00am Addthis PROBLEM: A vulnerability was reported in VMware vMA PLATFORM: Version(s): vMA 4.0, 4.1, 5 patch 1 (5.0.0.1) ABSTRACT: A local user can obtain elevated privileges on the target system. Reference Links: SecurityTracker Alert ID: 1027099 CVE-2012-2752 Vendor Advisory IMPACT ASSESSMENT: High Discussion: A local user can exploit a library loading error to cause arbitrary code to be executed on the target system with elevated privileges. Impact: Privilege escalation Solution: The vendor has issued a fix (vSphere Management Assistant 5.0 Patch 2 (5.0.0.2)). Addthis Related Articles T-591: VMware vmrun Utility Lets Local Users Gain Elevated Privileges

227

V-115: Apple iOS Bugs Let Local Users Gain Elevated Privileges | Department  

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

5: Apple iOS Bugs Let Local Users Gain Elevated Privileges 5: Apple iOS Bugs Let Local Users Gain Elevated Privileges V-115: Apple iOS Bugs Let Local Users Gain Elevated Privileges March 20, 2013 - 12:08am Addthis PROBLEM: Apple iOS Bugs Let Local Users Gain Elevated Privileges PLATFORM: Version(s): prior to 6.1.3 ABSTRACT: Several vulnerabilities were reported in Apple iOS REFERENCE LINKS: Apple security Article: HT1222 SecurityTracker Alert ID: 1028314 CVE-2013-0977 CVE-2013-0978 CVE-2013-0979 CVE-2013-0981 IMPACT ASSESSMENT: High DISCUSSION: A local user can exploit a flaw in the handling of Mach-O executable files with overlapping segments to execute unsigned code on the target system [CVE-2013-0977]. A local user can exploit a flaw in the ARM prefetch abort handling to determine the address of structures in the kernel [CVE-2013-0978].

228

Vertikalios aies v?jo j?gain?s sparno modeliavimas.  

E-Print Network (OSTI)

??Magistriniu darbu, kurio tema Vertikalios aies v?jo j?gin?s sparno modeliavimas, siekiama itirti maos galios, paprastos konstrukcijos, vertikalios aies v?jo j?gain?s sparnuotes, atlikti j? kompiuterin? modeliavim? (more)

Dinsmonas,; Darius

2013-01-01T23:59:59.000Z

229

Improved noise sensitivity under high-gain feedback in nano-positioning motion systems  

Science Conference Proceedings (OSTI)

To avoid an increased noise response under high-gain feedback in nano-positioning motion systems, a nonlinear (N-PID) control design is proposed. The design is of particular interest in the wafer scanning industry where nano-accuracy should be achieved ...

Marcel Heertjes; George Leenknegt; Bram Van Goch; Henk Nijmeijer

2009-06-01T23:59:59.000Z

230

THE CONCEPT OF ISOCHORIC CENTRAL SPARK IGNITION AND ITS FUEL GAIN IN INERTIAL FUSION  

E-Print Network (OSTI)

1 THE CONCEPT OF ISOCHORIC CENTRAL SPARK IGNITION AND ITS FUEL GAIN IN INERTIAL FUSION of the best methods in inertial confinement fusion (ICF) is the concept of central spark ignition, consisting of two distinct regions named as hot and cold regions and formed by hydro-dynamical implosion of fuel

Paris-Sud XI, Université de

231

Highly sensitive wide-dynamic range optical burst-mode receivers for ultra fast gain switching  

Science Conference Proceedings (OSTI)

Highly sensitive optical receivers in BiCMOS, sub-micron and deep-sub-micron CMOS technology are compared. Special attention is paid to burst-mode receivers with a wide-dynamic input range and with fast gain switching. A new burst-mode receiver design ... Keywords: Burst-mode receivers, Low noise, Optical receivers, Stability

K. Schneider; H. Zimmermann

2006-10-01T23:59:59.000Z

232

Study in Indonesia... and gain credit towards your degree! JournalismProfessionalPracticum  

E-Print Network (OSTI)

Study in Indonesia... and gain credit towards your degree! JournalismProfessionalPracticum inIndonesia will deep- en their understanding of Indonesia whilst developing their journalism skills within will be a high-calibre journalist who has experience with different elements of the media in both Indonesia

233

Study in Indonesia and gain credit towards your degree! InternationalRelationsinIndonesia  

E-Print Network (OSTI)

Study in Indonesia and gain credit towards your degree! InternationalRelationsinIndonesia, Europe and the United States as well as Indonesia, are highly qualified and ex- perienced as both the Australia Indonesia Institute, the Department of Education, Employment and Workplace Relations, the Myer

234

High Gain Observer for Induction Motor in Presence of Magnetic Hysteresis , L. Dugard3  

E-Print Network (OSTI)

High Gain Observer for Induction Motor in Presence of Magnetic Hysteresis H. Ouadi1 , F. Giri2 , L in induction motors is considered in this paper. In most previous works, motor observers have been designed using standard models, neglecting the saturation and hysteretic effects in the machine magnetic circuit

Paris-Sud XI, Université de

235

An Active Gain-control System for Avalanche Photo-Diodes under Moderate Temperature Variations  

E-Print Network (OSTI)

Avalanche photodiodes (APDs) are promising light sensor for various fields of experimental physics. It has been argued, however, that variation of APD gain with temperature could be a serious problem preventing APDs from replacing traditional photomultiplier tubes (PMTs) in some applications. Here we develop an active gain-control system to keep the APD gain stable under moderate temperature variations. As a performance demonstration of the proposed system, we have tested the response of a scintillation photon detector consisting of a 5x5 mm^2 reverse-type APD optically coupled with a CsI(Tl) crystal. We show that the APD gain was successfully controlled under a temperature variation of DT = 20deg, within a time-cycle of 6000 sec. The best FWHM energy resolution of 6.1+-0.2 % was obtained for 662 keV gamma-rays, and the energy threshold was as low as 6.5 keV, by integrating data from +20deg - 0deg cycles. The corresponding values for -20deg - 0deg cycles were 6.9+-0.2 % and 5.2 keV, respectively. These results are comparable, or only slightly worse than that obtained at a fixed temperature. Our results suggest new potential uses for APDs in various space researches and nuclear physics. As examples, we briefly introduce the NeXT and Cute-1.7 satellite missions that will carry the APDs as scientific instruments for the first time.

J. Kataoka; R. Sato; T. Ikagawa; J. Kotoku; Y. Kuramoto; Y. Tsubuku; T. Saito; Y. Yatsu; N. Kawai; Y. Ishikawa; N. Kawabata

2006-02-17T23:59:59.000Z

236

AlxGa1-xN-based avalanche photodiodes with high reproducible avalanche gain  

E-Print Network (OSTI)

of Electrical and Electronics Engineering, Bilkent University, Bilkent, 06800 Ankara, Turkey Received 5 December to be lower than 8 fA for bias voltages up to 20 V. The responsivity of the photodetectors is 0.13 A/W at 272 and fast response times.8 The lack of high internal gain has been the major limitation for the usage of Al

Ozbay, Ekmel

237

ARM: 10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

DOE Data Explorer (OSTI)

10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

238

ARM: 10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm  

SciTech Connect

10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

Chitra Sivaraman; Connor Flynn

2010-12-15T23:59:59.000Z

239

Form of multicomponent Fickian diffusion coefficients matrix J. Wambui Mutoru, Abbas Firoozabadi  

E-Print Network (OSTI)

and natural processes. However, experimental determinations of multicomponent diffu- sion coefficients that composition variation in multicomponent mixtures may differ markedly from binary mixtures due to cross that in ideal gas mixtures, all molecular diffusion coefficients are non-negative. Standart et al. [10

Firoozabadi, Abbas

240

CORRELATING EVAPORATION HEAT TRANSFER COEFFICIENT OF REFRIGERANT R-134a IN A PLATE HEAT EXCHANGER  

E-Print Network (OSTI)

1 CORRELATING EVAPORATION HEAT TRANSFER COEFFICIENT OF REFRIGERANT R-134a IN A PLATE HEAT EXCHANGER for evaporation heat transfer coefficient of refrigerant R-134a flowing in a plate heat exchanger. Correlation heat exchanger are found to result in large discrepancies with their own experimental data

Kandlikar, Satish

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


241

Determination of a time-dependent heat transfer coefficient from non-standard boundary measurements  

Science Conference Proceedings (OSTI)

In this paper the determination of the time-dependent heat transfer coefficient in one-dimensional transient heat conduction from a non-standard boundary measurement is investigated. For this inverse nonlinear ill-posed problem the uniqueness of the ... Keywords: Boundary element method, Heat conduction, Heat transfer coefficient, Inverse problem

T. T. M. Onyango; D. B. Ingham; D. Lesnic; M. Slodi?ka

2009-01-01T23:59:59.000Z

242

Temperature coefficients for PV modules and arrays: Measurement methods, difficulties, and results  

DOE Green Energy (OSTI)

The term temperature coefficient has been applied to several different photovoltaic performance parameters, including voltage, current, and power. The procedures for measuring the coefficient(s) for modules and arrays are not yet standardized, and systematic influences are common in the test methods used to measure them. There are also misconceptions regarding their application. Yet, temperature coefficients, however obtained, play an important role in PV system design and sizing, where often the worst case operating condition dictates the array size. This paper describes effective methods for determining temperature coefficients for cells, modules, and arrays; identifies sources of systematic errors in measurements; gives typical measured values for modules; and provides guidance for their application in system engineering.

King, D.L.; Kratochvil, J.A.; Boyson, W.E.

1997-11-01T23:59:59.000Z

243

Conveying the Benefits of Employment: A Comparison of the Organizational Settings of California's AFDC and GAIN Programs  

E-Print Network (OSTI)

Settings of Californias AFDC and GAIN Programs Workingwith Dependent Children (AFDC), the cash assistance programand training program for AFDC recipients. A major conclusion

Jewell, Christopher; Glaser, Bonnie

2003-01-01T23:59:59.000Z

244

T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain  

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

8: HP Virtual Server Environment Lets Remote Authenticated 8: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges April 22, 2011 - 7:47am Addthis PROBLEM: A vulnerability was reported in HP Virtual Server Environment. A remote authenticated user can obtain elevated privileges on the target system. PLATFORM: HP Virtual Server Environment prior to v6.3 ABSTRACT: A potential security vulnerability has been identified in HP Virtual Server Environment for Windows. The vulnerability could be exploited remotely to elevate privileges. reference LINKS: HP Document ID: c02749050 SecurityTracker Alert ID: 1025429 CVE-2011-1724 HP Insight Software media set 6.3 HP Technical Knowledge Base Discussion: System management and security procedures must be reviewed frequently to

245

Scaling of Energy Gain with Plasma Parameters in a Plasma Wakefield Accelerator  

SciTech Connect

We have recently demonstrating the doubling of the energy of particles of the ultra-short, ultra-relativistic electron bunches of the Stanford Linear Accelerator Center [1]. This energy doubling occurred in a plasma only 85 cm-long with a density of {approx} 2.6 x 10{sup 17} e{sup -}/cm{sup -3}. This milestone is the result of systematic measurements that show the scaling of the energy gain with plasma length and density, and show the reproducibility and the stability of the acceleration process. We show that the energy gain increases linearly with plasma length from 13 to 31 cm. These are key steps toward the application of beam-driven plasma accelerators or plasma wakefield accelerators (PWFA) to doubling the energy of a future linear collider without doubling its length.

Blumenfeld, I.; Decker, F.J.; Hogan, M.J.; Ischebeck, R.; Iverson, R.H.; Kirby, N.A.; Siemann, Robert H.; Walz, D.R.; /SLAC; Clayton, C.E.; Huang, C.; Joshi, C.; Lu, W.; Marsh, K.A.; Mori, W.B.; Zhou, M.; /UCLA; Katsouleas, T.C.; Muggli, P.; Oz, E.; /Southern California U.

2008-01-28T23:59:59.000Z

246

Physically transparent formulation of a free-electron laser in the linear gain regime  

SciTech Connect

The recent 2-dimensional analytic theories of a free-electron laser (FEL) in the linear regime are reformulated in terms of three dimensionless ratios that describe the degree to which the characteristics of the electron beam deviate from the cold beam limit of a beam with no emittance or energy spread. In terms of these ratios, algebraic model equations of a fit that combines features of both of the 2-dimensional analyses are given as a convenient computational tool. Graphs of the FEL gain eigenvalue computed with the combined 2-D formulation illustrate that the gain and the output power at saturation are reduced from the 1-D value, when any of the ratios is larger than unity.

Barletta, W.A. [Lawrence Livermore National Lab., CA (United States); Sessler, A.M. [Lawrence Berkeley Lab., CA (United States); Yu, L.H. [Brookhaven National Lab., Upton, NY (United States)

1992-08-01T23:59:59.000Z

247

Reducing Thermal Losses and Gains With Buried and Encapsulated Ducts in Hot-Humid Climates  

SciTech Connect

The Consortium for Advanced Residential Buildings (CARB) monitored three houses in Jacksonville, FL, to investigate the effectiveness of encapsulated and encapsulated/buried ducts in reducing thermal losses and gains from ductwork in unconditioned attics. Burying ductwork beneath loose-fill insulation has been identified as an effective method of reducing thermal losses and gains from ductwork in dry climates, but it is not applicable in humid climates where condensation may occur on the outside of the duct jacket. By encapsulating the ductwork in closed cell polyurethane foam (ccSPF) before burial beneath loose-fill mineral fiber insulation, the condensation potential may be reduced while increasing the R-value of the ductwork.

Shapiro, C.; Magee, A.; Zoeller, W.

2013-02-01T23:59:59.000Z

248

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

SciTech Connect

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

2010-05-14T23:59:59.000Z

249

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

SciTech Connect

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

2010-05-14T23:59:59.000Z

250

Investigation of the electron trajectories and gain regimes of the whistler pumped free-electron laser  

SciTech Connect

A free-electron laser (FEL) scheme, which employs the whistler wave as a slow electromagnetic wave wiggler, was studied theoretically. Subjected to the transverse fields of whistler wave wiggler, the beam electrons are the source of the energy needed to produce electromagnetic radiation. The strength and the period of the wiggler field depend on the parameters of the magnetoplasma medium. This configuration has a higher tunability by controlling the plasma density, on top of the {gamma}-tunability of the conventional FELs. The theory of linear gain and electron trajectories was presented and four groups (I, II, III, and IV) of electron orbits were found in the presence of an axial guide magnetic field. Using perturbation analysis, it is found that these groups of orbits were stable except small regions of group I and IV orbits. The function {Phi} which determines the rate of change of axial velocity with beam energy was also derived. In the case in which {Phi}<0 represents a negative-mass regime in which the axial velocity accelerates as the electrons lose energy. Numerical solutions showed that by increasing the cyclotron frequency, the gain for group I and III orbits increased, while a gain decrement was obtained for group II and IV orbits.

Jafarinia, F.; Jafari, S. [Department of Physics, University of Guilan, Rasht 41335-1914 (Iran, Islamic Republic of); Mehdian, H. [Department of Physics and Institute for Plasma Research, Tarbiat Moallem University, Tehran 15614 (Iran, Islamic Republic of)

2013-04-15T23:59:59.000Z

251

Epistemology of Modeling and Simulation: How can we gain Knowledge from Simulations?  

E-Print Network (OSTI)

Epistemology is the branch of philosophy that deals with gaining knowledge. It is closely related to ontology. The branch that deals with questions like "What is real?" and "What do we know?" as it provides these components. When using modeling and simulation, we usually imply that we are doing so to either apply knowledge, in particular when we are using them for training and teaching, or that we want to gain new knowledge, for example when doing analysis or conducting virtual experiments. This paper looks at the history of science to give a context to better cope with the question, how we can gain knowledge from simulation. It addresses aspects of computability and the general underlying mathematics, and applies the findings to validation and verification and development of federations. As simulations are understood as computable executable hypotheses, validation can be understood as hypothesis testing and theory building. The mathematical framework allows furthermore addressing some challenges when developing federations and the potential introduction of contradictions when composing different theories, as they are represented by the federated simulation systems.

Andreas Tolk; Saikou Y. Diallo; Jose J. Padilla; Ross Gore

2013-06-21T23:59:59.000Z

252

Electro-osmotic drag coefficient of water and methanol in polymer electrolytes at elevated temperatures  

Science Conference Proceedings (OSTI)

The electro-osmotic drag coefficient of water in two polymer electrolytes was experimentally determined as a function of water activity and current density for temperatures up to 200 C. The results show that the electro-osmotic drag coefficient varies from 0.2 to 0.6 in Nafion{reg_sign}/H{sub 3}PO{sub 4} membrane electrolyte, but is essentially zero in phosphoric acid-doped PBI (polybenzimidazole) membrane electrolyte over the range of water activity considered. The near-zero electro-osmotic drag coefficient found in PBI indicates that this electrolyte should lessen the problems associated with water redistribution in proton exchange membrane fuel cells.

Weng, D.; Wainright, J.S.; Landau, U.; Savinell, R.F. [Case Western Reserve Univ., Cleveland, OH (United States)

1996-04-01T23:59:59.000Z

253

Transport coefficients in Lorentz plasmas with the power-law kappa-distribution  

E-Print Network (OSTI)

Transport coefficients in Lorentz plasma with the power-law kappa-distribution are studied by means of using the transport equation and the macroscopic laws of Lorentz plasma without magnetic field. Expressions of electric conductivity, thermoelectric coefficient and thermal conductivity for the power-law kappa-distribution are accurately derived. It is shown that these transport coefficients are modified significantly by the kappa-parameter, and in the limit of the parameter kappa to infinit they are reduced to the standard forms for a Maxwellian distribution.

Jiulin, Du

2013-01-01T23:59:59.000Z

254

Transport coefficients of strongly coupled gauge theories: insights from string theory  

E-Print Network (OSTI)

The transport properties of certain strongly coupled thermal gauge theories can be determined from their effective description in terms of gravity or superstring theory duals. Here we provide a short summary of the results for the shear and bulk viscosity, charge diffusion constant, and the speed of sound in supersymmetric strongly interacting plasmas. We also outline a general algorithm for computing transport coefficients in any gravity dual. The algorithm relates the transport coefficients to the coefficients in the quasinormal spectrum of five-dimensional black holes in asymptotically anti de Sitter space.

Andrei O. Starinets

2005-11-26T23:59:59.000Z

255

Electric coheating experiment to determine the heat-loss coefficient of a double-envelope house  

DOE Green Energy (OSTI)

An electric coheating experiment was conducted on a double-envelope house in Arvada, Colorado, to determine the total heat loss coefficient (UA) of the double-shelled structure, as well as the heat loss coefficients of the inner and outer shells. Electric coheating is fairly well established as an experimental method for determining the total heat loss coefficient in conventional residential buildings. However, special problems are introduced with passive and double-envelope buildings. A new methodology was developed to meet these problems. That methodology and the results of the experimental investigation are presented and discussed.

Ortega, J. K.E.; Anderson, J. V.; Connolly, J. M.; Bingham, C. E.

1981-07-01T23:59:59.000Z

256

Diversity order for amplify-and-forward dual-hop systems with fixed-gain relay under Nakagami fading channels  

Science Conference Proceedings (OSTI)

Dual-hop transmission systems employing fixed-gain amplify-and-forward (AF) relaying have been studied recently over Nakagami fading channels. These analyses, however, either have imposed certain constraints on the fading parameters or have not been ... Keywords: Nakagami fading, amplify-and-forward, diversity order, fixed-gain relay, outage probability

Feng Xu; Francis C. M. Lau; Dian-Wu Yue

2010-01-01T23:59:59.000Z

257

GAINS-BI: business intelligent approach for greenhouse gas and air pollution interactions and synergies information system  

Science Conference Proceedings (OSTI)

The Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS)-Model is studied and developed to provide a consistent framework for the analysis of co-benefits reduction strategies from air pollution and greenhouse gas sources. In this ... Keywords: ETL, GAINS, business intelligent, data warehouse

Thanh Binh Nguyen; Wolfgang Schoepp; Fabian Wagner

2008-11-01T23:59:59.000Z

258

DFIG-Based Wind Turbine Robust Control Using High-Order Sliding Modes and a High Gain Observer  

E-Print Network (OSTI)

DFIG-Based Wind Turbine Robust Control Using High-Order Sliding Modes and a High Gain Observer is proposed to ensure power extraction optimization of a DFIG- based wind turbine. The proposed control strategy combines an MPPT using a high gain observer and second-order sliding mode for the DFIG control

Paris-Sud XI, Université de

259

A Combined High Gain Observer and High-Order Sliding Mode Controller for a DFIG-Based Wind  

E-Print Network (OSTI)

A Combined High Gain Observer and High-Order Sliding Mode Controller for a DFIG-Based Wind Turbine optimization of a DFIG- based wind turbine. The proposed control strategy combines an MPPT using a high gain observer and second-order sliding mode for the DFIG control. This strategy presents attractive features

Paris-Sud XI, Université de

260

Oscillation Criteria in First Order Neutral Delay Impulsive Differential Equations with Constant Coefficients  

Science Conference Proceedings (OSTI)

This paper is dealing with the oscillatory properties of first order neutral delay impulsive differential equations and corresponding to them inequalities with constant coefficients. The established sufficient conditions ensure the oscillation of every solution of this type of equations.

Dimitrova, M. B.; Donev, V. I. [Dept. of Mathematics, Technical University of Sofia, branch Sliven, 8800 Sliven (Bulgaria)

2008-10-30T23:59:59.000Z

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


261

A Decomposition of the Correlation Coefficient and its Use in Analyzing Forecasting Skill  

Science Conference Proceedings (OSTI)

Estimates of several components of forecasting skill can be obtained by combining a skill-score decomposition developed by Allan Murphy with techniques for decomposing correlation coefficients that have been employed in research on human ...

Thomas R. Stewart

1990-12-01T23:59:59.000Z

262

The Relationship between Flux Coefficient and Entrainment Ratio in Density Currents  

Science Conference Proceedings (OSTI)

The authors explore the theoretical and empirical relationship between the nonlocal quantities of the entrainment ratio E, the appropriately depth- and time-averaged flux coefficient ?, and the bulk Froude number Fro in density currents. The main ...

Mathew Wells; Claudia Cenedese; C. P. Caulfield

2010-12-01T23:59:59.000Z

263

Assumptions to the Annual Energy Outlook 2001 - Table 4. Coefficients of  

Gasoline and Diesel Fuel Update (EIA)

Coefficients of Linear Equations for Natural Gas- and Coefficients of Linear Equations for Natural Gas- and Oil-Related Methane Emissions Emissions Sources Intercept Variable Name and Units Coefficient Variable Name and Units Coefficient Natural Gas -38.77 Time trend (calendar year) .02003 Dry gas production (thousand cubic feet .02186 Natural Gas Processing -0.9454 Natural gas liquids production (million barrels per day) .9350 Not applicable Natural Gas Transmission and Storage 2.503 Pipeline fuel use (thousand cubic feet) 1.249 Dry gas production (thousand cubic feet) -0.06614 Natural Gas Distribution -58.16 Time trend (calendar year) .0297 Natural gas consumption (quadrillion Btu) .0196 Oil production, Refining, and Transport 0.03190 Oil consumption (quadrillion Btu) .002764 Not applicable Source: Derived from data used in Energy Information Administration, Emissions of Greenhouse Gases in the United States 1999, DOE/EIA-0573(99), (Washington, DC, October 2000).

264

Hardy-Littlewood theorem for trigonometric series with {alpha}-monotone coefficients  

Science Conference Proceedings (OSTI)

The Hardy-Littlewood theorem is established for trigonometric series with {alpha}-monotone coefficients. Inequalities of Hardy-Littlewood kind are proved. Examples of series demonstrating that the results obtained are sharp are constructed. Bibliography: 15 titles.

Dyachenko, Mikhail I [M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation); Nursultanov, Erlan D [Kazakhstan Branch of Lomonosov Moscow State University, Astana (Kazakhstan)

2009-12-31T23:59:59.000Z

265

Correlation Coefficients between Horizontally and Vertically Polarized Returns from Ground Clutter  

Science Conference Proceedings (OSTI)

Characteristics of the magnitude and phase of correlation coefficients between horizontally and vertically polarized returns from ground clutter echoes are quantified by analyzing histograms obtained with an 11-cm wavelength weather surveillance ...

Dusan S. Zrni?; Valery M. Melnikov; Alexander V. Ryzhkov

2006-03-01T23:59:59.000Z

266

A Case Study of Nearshore Drag Coefficient Behavior during Hurricane Ike (2008)  

Science Conference Proceedings (OSTI)

Over the past decade, numerous field campaigns and laboratory experiments have examined airsea momentum exchange in the deep ocean. These studies have changed the understanding of drag coefficient behavior in hurricane force winds, with a general ...

Brian C. Zachry; John L. Schroeder; Andrew B. Kennedy; Joannes J. Westerink; Chris W. Letchford; Mark E. Hope

2013-09-01T23:59:59.000Z

267

The Effective Drag Coefficient for Evaluating Wind Stress over the Oceans  

Science Conference Proceedings (OSTI)

Computations of the surface wind stress and pseudostress over the global oceans have been made using surface winds from the European Centre for Medium Range Weather Forecasts for 7 years. The drag coefficient is a function of wind speed and ...

Kevin E. Trenberth; William G. Large; Jerry G. Olson

1989-12-01T23:59:59.000Z

268

Impact of the Reduced Drag Coefficient on Ocean Wave Modeling under Hurricane Conditions  

Science Conference Proceedings (OSTI)

Effects of new drag coefficient (Cd) parameterizations on WAVEWATCH III (WW3) model surface wave simulations are investigated. The new parameterizations are based on a coupled windwave model (CWW) and a wave tank experiment, and yields reduced C...

Il-Ju Moon; Isaac Ginis; Tetsu Hara

2008-03-01T23:59:59.000Z

269

Trends in Daily Solar Radiation and Precipitation Coefficients of Variation since 1984  

Science Conference Proceedings (OSTI)

This study investigates the possibility of changes in daily scale solar radiation and precipitation variability. Coefficients of variation (CVs) were computed for the daily downward surface solar radiation product from the International Satellite ...

David Medvigy; Claudie Beaulieu

2012-02-01T23:59:59.000Z

270

The Relation between Cumulus Albedo and Extinction Coefficient and Its Application to Remote Sensing  

Science Conference Proceedings (OSTI)

An analytic model of three-dimensional radiative transfer is modified to include cloud-cloud interactions and finite surface albedo. The spectrally integrated output is used to derive extinction coefficients for cumulus clouds from aircraft ...

S. G. Bradley

1981-10-01T23:59:59.000Z

271

Green's matrices of second order elliptic systems with measurable coefficients in two dimensional domains  

E-Print Network (OSTI)

We study Green's matrices for divergence form, second order strongly elliptic systems with bounded measurable coefficients in two dimensional domains. We establish existence, uniqueness, and pointwise estimates of the Green's matrices.

Dong, Hongjie

2007-01-01T23:59:59.000Z

272

An Estimation of the Bulk Transfer Coefficients for a Bare Soil Surface Using a Linear Model  

Science Conference Proceedings (OSTI)

A linear heat budget model is developed to estimate the daytime means of the bulk transfer coefficients for heat and evaporation efficiency using the daily variation of observational data. The daily variation of shortwave radiation, ground-level ...

Dai Matsushima; Junsei Kondo

1995-04-01T23:59:59.000Z

273

Dimensionally Consistent Similarity Relation of Ocean Surface Friction Coefficient in Mixed Seas  

Science Conference Proceedings (OSTI)

Applying wavelength scaling, dimensionally consistent expressions of the ocean surface friction coefficient can be developed for both wind sea and mixed sea in the ocean. For a wind sea with a monopeak wave spectrum, the natural choice of the ...

Paul A. Hwang; Hctor Garca-Nava; Francisco J. Ocampo-Torres

2011-06-01T23:59:59.000Z

274

DEGENERATE-PARABOLIC PARTIAL DIFFERENTIAL EQUATIONS WITH UNBOUNDED COEFFICIENTS, MARTINGALE PROBLEMS, AND A  

E-Print Network (OSTI)

DEGENERATE-PARABOLIC PARTIAL DIFFERENTIAL EQUATIONS WITH UNBOUNDED COEFFICIENTS, MARTINGALE four intertwined problems, motivated by mathematical finance, concerning degenerate-parabolic partial differential operators and degenerate diffusion processes. First, we consider a parabolic partial differential

275

Quantifying the economic and commercial potential of a high strength, low thermal coefficient super-alloy  

E-Print Network (OSTI)

Inspired by the importance of having a favourable sheathing material for superconducting wires, a high-strength, low thermal coefficient (CTE) super-alloy has been developed. Known as Incoloy 908, this super-alloy's material ...

Liew, Heng Lee Henry

2008-01-01T23:59:59.000Z

276

Trends in Attenuation Coefficients in Athens, Greece, from 1954 to 1991  

Science Conference Proceedings (OSTI)

Unsworth and Monteith's attenuation coefficient TUM was calculated from midday cloudless sky data in Athens, Greece, for the period 1954 to 1991. An interdependence between TUM and the Linke factor TL was found and is expressed as a mathematical ...

C. P. Jacovides; N. A. Kaltsounides; G. P. Giannourakos; G. B. Kallos

1995-06-01T23:59:59.000Z

277

Inference of the Aerosol ngstrm Coefficient from SAGE Short-Wavelength Data  

Science Conference Proceedings (OSTI)

SAGE four-channel transmission profiles are inverted to retrieve the extinction profiles from which the aerosol ngstrm coefficient ? is obtained. The procedure allows one to check the influence of the NO2 absorption profile, which is small ...

J. Lenoble; P. Pruvost

1983-10-01T23:59:59.000Z

278

Temperature Dependence of Evaporation Coefficient for Water Measured in Droplets in Nitrogen under Atmospheric Pressure  

Science Conference Proceedings (OSTI)

The evaporation and the thermal accommodation coefficients for water in nitrogen were investigated by means of the analysis of evaporation of pure water droplet as a function of temperature. The droplet was levitated in an electrodynamic trap ...

D. Jakubczyk; M. Zientara; K. Kolwas; M. Kolwas

2007-03-01T23:59:59.000Z

279

Power series with restricted coefficients and a root on a ... - CECM  

E-Print Network (OSTI)

with restricted coefficients by finding the smallest root of such a power series .... h ?(mod 2?) can be taken as the argument of the dividing line in ? heorem 1.3;.

280

An estimate of heavy quark momentum diffusion coefficient in gluon plasma  

E-Print Network (OSTI)

We calculate the momentum diffusion coefficient for heavy quarks in SU(3) gluon plasma at temperatures 1-2 times the deconfinement temperature. The momentum diffusion coefficient is extracted from a Monte Carlo calculation of the correlation function of color electric fields, in the leading order of expansion in heavy quark mass. Systematics of the calculation are examined, and compared with perturbtion theory and other estimates.

Debasish Banerjee; Saumen Datta; Rajiv V. Gavai; Pushan Majumdar

2012-11-11T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Coefficients and terms of the liquid drop model and mass formula  

E-Print Network (OSTI)

The coefficients of different combinations of terms of the liquid drop model have been determined by a least square fitting procedure to the experimental atomic masses. The nuclear masses can also be reproduced using a Coulomb radius taking into account the increase of the ratio $R\\_0/A^{1/3}$ with increasing mass, the fitted surface energy coefficient remaining around 18 MeV.

G. Royer; C. Gautier

2006-08-28T23:59:59.000Z

282

The Diffusion Coefficient For Piecewise Expanding Maps Of The Interval With Metastable States  

E-Print Network (OSTI)

Consider a piecewise smooth expanding map of the interval possessing several invariant subintervals and the same number of ergodic absolutely continuous invariant probability measures (ACIMs). After this system is perturbed to make the subintervals lose their invariance in such a way that there is a unique ACIM, we show how to approximate the diffusion coefficient for an observable of bounded variation by the diffusion coefficient of a related continuous time Markov chain.

Dmitry Dolgopyat; Paul Wright

2010-11-24T23:59:59.000Z

283

Second quarter trims earnings gain of OGJ group of U. S. oil companies  

SciTech Connect

This paper reports that first half of 1991 profits for the Oil and Gas Journal group of 22 large U.S. oil companies totaled $10,553 billion, down a scant 0.1% from the same period the year before. However, second quarter profits were down sharply, dipping to $3.656 billion or 27.4% below the second quarter of 1990. This is in sharp contrast with first quarter profits, which totaled $6.897 billion and were up 24.8% from the same period of 1990. First half individuals results were widely diverse, with seven companies showing profit improvements from last year and 15 companies a decline. Only one, Murphy Oil Co., posted a loss in the first half. Six companies showed profit gains of more than 20% and 11 posted declines greater than 20%. In the second quarter 16 of the group had lower earnings than they booked in the same period of 1990. Restructuring charges and gains, along with provisions for future environmental costs, continued to have a great deal of influence over year to year changes in profits. Chemical earnings were down for the 6 months and in the second quarter for most companies. U.S. refining and marketing earnings were mixed but generally lower for both periods. Due to an economic recession product demand was down in the first half of this year. Non-U.S. refining and marketing profits were up for the first half, but the gain stemmed from improved margins in the first quarter.

Beck, R.J.; Biggs, J.B.

1991-09-02T23:59:59.000Z

284

Verification of BLAST by comparison with direct gain test cell measurements  

DOE Green Energy (OSTI)

Comparisons between temperatures measured in a direct solar gain test cell and temperatures predicted by the building energy analysis computer program BLAST are reported. The comparisons were performed for three distinct climate periods; the simulations were driven by weather data collected at the test cell site in Los Alamos, New Mexico. The test cell configurations and weather data manipulations are described; quantitative evaluations of the comparisons between measured and predicted interior temperatures are presented; limitations of the comparisons are discussed; and sensitivities of the simulation results to uncertainties in the measured parameters are examined.

Andersson, B.; Bauman, F.; Kammerud, R.

1980-11-01T23:59:59.000Z

285

Native Students and the Gains from Exporting Higher Education: Evidence from Australia  

E-Print Network (OSTI)

This paper proposes a general equilibrium model with non-prot publicly subsidized universities to show that native applicants do not have to lose from exporting higher education, as suggested by standard trade models. The gains from exporting higher education that initially accrue to universities will be redistributed to natives through increased investment in research and teaching. With Australian university-level data from 2001 to 2007, the empirical investigation identies the impact of exporting higher education on native enrollment using the instrumental variable approach: the enrollment of one more foreign student leads to the enrollment of about 0.75 more Australian native students.

Li Zhou; Julie Cullen; Gordon Hanson; Gordon Dahl; Roger Gordon

2011-01-01T23:59:59.000Z

286

Method and system for modulation of gain suppression in high average power laser systems  

Science Conference Proceedings (OSTI)

A high average power laser system with modulated gain suppression includes an input aperture associated with a first laser beam extraction path and an output aperture associated with the first laser beam extraction path. The system also includes a pinhole creation laser having an optical output directed along a pinhole creation path and an absorbing material positioned along both the first laser beam extraction path and the pinhole creation path. The system further includes a mechanism operable to translate the absorbing material in a direction crossing the first laser beam extraction laser path and a controller operable to modulate the second laser beam.

Bayramian, Andrew James (Manteca, CA)

2012-07-31T23:59:59.000Z

287

Determination of the Heat-Transport Coefficient in Energy-Balance Climate Models by Extremization of Entropy Production  

Science Conference Proceedings (OSTI)

Entropy production has been calculated as a function of the coefficient of meridional heat transfer for two seasonal energy-balance climate models. Both models display extrema in entropy production at values of the coefficient appropriate to the ...

P. H. Wyant; A. Mongroo; S. Hameed

1988-01-01T23:59:59.000Z

288

Thermal Green's functions of the energy-momentum tensor and transport coefficients of the SU(3) Yang-Mills gas  

E-Print Network (OSTI)

Thermal Green's functions of the energy-momentum tensor and transport coefficients of the SU(3) Yang-Mills gas

Karsch, Frithjof

1987-01-01T23:59:59.000Z

289

Effect of milk composition upon the partition coefficients of diacetyl, acetaldehyde, and ethanol in acidified milk products  

E-Print Network (OSTI)

Acidified milk samples were prepared with fat concentrations from 0 to 20% and solids-not-fat concentrations from 6 to 12%. The partition coefficients of acetaldehyde, ethanol, and diacetyl were determined in acidified samples at pH 4.4 and 4.6, and at 30 and 500C using gas chromatographic headspace analysis (IGCHS). Concentration, SNF x concentration and the SNF x fat x concentration interaction affected the partition coefficients of acetaldehyde at both 30 and 50'C. At 50'C, the milk fat x concentration interaction significantly affected the partition coefficient. The partition coefficient of acetaldehyde increased with increasing concentrations of milk fat. Partition coefficients decreased as concentration of acetaldehyde increased. The partition coefficients for ethanol at 300C were affected only by concentration of ethanol. At 500C, concentration of ethanol, pH, milk fat, milk fat x concentration interaction, and SNF x milk fat x pH interaction affected the partition coefficients of ethanol. The partition coefficients for ethanol increased with increasing concentration of ethanol at both temperatures. At 500C, partition coefficients increased as concentration of milk fat increased at 12 % SNF and pH did not have an effect on partition coefficients. Concentration of diacetyl, pH, and milk fat x concentration interaction affected the partition coefficients of diacetyl at both temperatures. At 300C, milk fat affected the partition coefficients of diacetyl and at 500C, pH x concentration of diacetyl interaction affected the partition coefficients of diacetyl. Partition coefficients increased with increasing concentration of diacetyl at both temperatures. At 300C, as concentration of milk fat increased so did the partition coefficients. The highest partition coefficients were observed for acetaldehyde compared to diacetyl and ethanol at both temperatures and at the lowest concentration.

Wilke, Anthony Gerald

1994-01-01T23:59:59.000Z

290

Behavior of the particle transport coefficients near the density limit in MTX  

SciTech Connect

The perturbed particle transport coefficients were determined for a range of plasma conditions in the Alcator C tokamak, a component of the Microwave Tokamak Experiment (MTX), from analysis of density perturbations created in gas modulation experiments. Density measurements from a 15 chord far-infrared interferometer were sufficiently detailed to allow radial profiles of the transport coefficients to be resolved. Gas modulation experiments were carried out on plasmas over a range of relatively low currents and a wide variety of line-averaged densities, including values near the Greenwald density limit. With this technique the perturbed diffusion coefficient D and the perturbed convection velocity V can be determined simultaneously. Measured profiles of D rise toward the outside of the plasma column in a manner generally similar to those determined previously for {chi}{sub e,HP} from sawtooth heat pulse propagation. Values of D are typically smaller than those of {chi}{sub e,HP} given for the same line-averaged densities by a factor of 2-5. Diffusion coefficients from a series of discharges at constant current showed little variation with density through most of the saturated ohmic confinement regime. At the Greenwald density limit threshold a dramatic increase occurred in both the perturbed convective and diffusive transport coefficients in the outer region of the plasma. The increases were most pronounced at the outermost range of the radii where coefficients were determined (r/a = 0.8), but were apparent over a region which extended well into the plasma interior. Density profiles maintained a similar shape near the density limit, congruous with the similar behavior of the transport coefficients. No dramatic deterioration was evident in the global energy confinement.

Marinak, M.M.

1993-04-01T23:59:59.000Z

291

Diffusion Coefficients  

Science Conference Proceedings (OSTI)

Mar 13, 2012 ... Challenges in Constructing Diffusion Mobility Databases for Industrial Alloys: ... Implementation of new initiatives such as the Materials Genome...

292

Binomial Coefficients  

Science Conference Proceedings (OSTI)

... Dataplot computes this function using the BINOM function from the SLATEC library. This routine was written by W. Fullerton of LANL. ...

2010-12-02T23:59:59.000Z

293

A framework for estimating pollutant export coefficients from long-term in-stream water quality monitoring data  

Science Conference Proceedings (OSTI)

Modeling techniques for estimating pollutant loadings to water bodies range from simple export coefficient and regression models to more complex mechanistic models. All export coefficient models and many complex mechanistic models rely on pollutant export ... Keywords: BOD, CODMn, NO3-N, PO4-P, Point and non-point source pollutant loadings, Pollutant export coefficients, Water quality

S. Shrestha; F. Kazama; L. T. H. Newham

2008-02-01T23:59:59.000Z

294

A Novel Gain Time Reclaiming Framework Integrating WCET Analysis for Object-Oriented Real-Time Systems  

E-Print Network (OSTI)

This paper proposes a novel gain time reclaiming framework integrating WCET analysis for objectoriented real-time systems in order to provide greater flexibility and without loss of the predictability and e#- ciency of the whole system. In this paper we present an approach which demonstrates how to improve the utilisation and overall performance of the whole system by reclaiming gain time at run-time. Our approach shows that integrating WCET with gain time reclaiming not only can provide a more flexible environment to develop object-oriented real-time applications, but it also does not necessarily result in unsafe or unpredictable timing analysis.

Erik Yu-shing Hu; Andy Wellings; Guillem Bernat

2002-01-01T23:59:59.000Z

295

A New Wireless Channel Fade Duration Model for Exploiting Multi-User Diversity Gain and Its Applications  

Science Conference Proceedings (OSTI)

In this paper, we propose a theoretical framework to analyze the performance of upper layer algorithms and protocols such as scheduling disciplines which exploit the gain of multi-user diversity to optimize the utilization of wireless communication systems ...

Chengzhi Li; Hao Che; Sanqi Li; Dapeng Wu

2006-06-01T23:59:59.000Z

296

High-power, Ultralow-noise Semiconductor External Cavity Lasers Based on Low-confinement Optical Waveguide Gain Media  

E-Print Network (OSTI)

For the past several years, we have been developing a new class of high-power, low-noise semiconductor optical gain medium based on the slab-coupled optical waveguide (SCOW) concept. The key characteristics of the SCOW ...

Juodawlkis, Paul W.

297

Backscattering Gain Measurements of Spherical Ice Hydrometeors at 35.8 GHz and Comparison to Numerical Computations  

Science Conference Proceedings (OSTI)

A 35.8-GHz scatterometer was tested and used for backscattering gain measurements of spherically shaped artificial hydrometeors varying in composition and size: homogeneous ice with 1.7 ? r ? 15 mm, different volume fractions of air bubbles ...

Franco Prodi; Alvise Moretti; Orazio Sturniolo

1996-04-01T23:59:59.000Z

298

Third-order perturbation theory for van der Waals interaction coefficients  

SciTech Connect

The third-order expression for the dispersion interaction between two atoms is written as a sum over lists of transition matrix elements. Particular attention is given to the C{sub 9}/R{sup 9} interaction which occurs in the homonuclear case when one atom is in an S state and the other is in a P state. Numerical values of the C{sub 9} coefficient are given for the homonuclear alkali-metal dimers. The size of the C{sub 9}:C{sub 3} dispersion coefficient ratio increases for the heavier alkali-metal atoms. The C{sub 11} and C{sub 13} coefficients between two helium atoms and lithium atoms in their ground states are also given.

Tang Liyan; Shi Tingyun [State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); Yan Zongchao [Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071 (China); Department of Physics, Wuhan University, Wuhan 430072 (China); Department of Physics, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3 (Canada); Mitroy, J. [School of Engineering, Charles Darwin University, Darwin NT 0909 (Australia)

2011-11-15T23:59:59.000Z

299

NREL: News - NREL Solar Research Gains Two R&D 100 Awards  

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

Bookmark and Share Printable Version Bookmark and Share Printable Version News Release NR-2208 NREL Solar Research Gains Two R&D 100 Awards July 17, 2008 An ultra-light, highly efficient solar cell and use of ink-jet printing to manufacture thin-film photovoltaics-both developed at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory-have been named among this year's most significant innovations by Research & Development (R&D) Magazine. Known as "the Oscars of Invention," the R&D 100 Award showcases the most significant new technologies commercialized worldwide. NREL has won a total of 42 of the awards, which the magazine has been presenting annually since 1969. The new Inverted Metamorphic Multi-Junction solar cell was developed at NREL and is being commercialized by Emcore Corp. of Albuquerque, N.M., in

300

Assessing Carbon Dynamics in Semiarid Ecosystems: Balancing Potential Gains with Potential Large Rapid Losses  

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

Assessing Carbon Dynamics in Semiarid Ecosystems: Assessing Carbon Dynamics in Semiarid Ecosystems: Balancing Potential Gains With Potential Large Rapid Losses David D. Breshears (daveb@lanl.gov; 505-665-2803) Environmental Dynamics and Spatial Analysis Group (EES-10), Mail Stop J495 Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos, NM 87545 Michael H. Ebinger (mhe@lanl.gov, 505-667-4417) Environmental Dynamics and Spatial Analysis Group (EES-10), Mail Stop J495 Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos, NM 87545 Pat J. Unkefer (punkefer@lanl.gov, 505-665-2803) Biosciences Division, BS-1 Los Alamos National Laboratory Los Alamos, NM 87545 Craig D. Allen (craig_allen@usgs.gov, 505-672-3861, Ext. 541) U. S. Geological Survey, Midcontinent Ecological Science Center

Note: This page contains sample records for the topic "gain coefficient cxs" from the National Library of EnergyBeta (NLEBeta).
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301

Hodges residence: performance of a direct gain passive solar home in Iowa  

DOE Green Energy (OSTI)

Results are presented for the performance of the Hodges Residence, a 2200-square-foot earth-sheltered direct gain passive solar home in Ames, Iowa, during the 1979-80 heating season, its first occupied season. No night insulation was used on its 500 square feet of double-pane glass. Total auxiliary heat required was 43 GJ (41 MBTU) gross and 26 GJ (25 MBTU) net, amounting, respectively, to 60 and 36 kJ/C/sup 0/-day-m/sup 2/ (2.9 and 1.8 BTU/F/sup 0/-day-ft/sup 2/). The heating season was unusually cloudy and included the cloudiest January in the 21 years of Ames insolation measurements. Results are also presented for the performance of the hollow-core floor which serves as the main storage mass and for the comfort range in the house.

Hodges, L.

1980-01-01T23:59:59.000Z

302

Driving high-gain shock-ignited inertial confinement fusion targets by green laser light  

Science Conference Proceedings (OSTI)

Standard direct-drive inertial confinement fusion requires UV light irradiation in order to achieve ignition at total laser energy of the order of 1 MJ. The shock-ignition approach opens up the possibility of igniting fusion targets using green light by reducing the implosion velocity and laser-driven ablation pressure. An analytical model is derived, allowing to rescale UV-driven targets to green light. Gain in the range 100-200 is obtained for total laser energy in the range 1.5-3 MJ. With respect to the original UV design, the rescaled targets are less sensitive to irradiation asymmetries and hydrodynamic instabilities, while operating in the same laser-plasma interaction regime.

Atzeni, Stefano; Marocchino, Alberto; Schiavi, Angelo [Dipartimento SBAI, Universita di Roma 'La Sapienza' and CNISM, Via A. Scarpa 14-16, I-00161 Roma (Italy)

2012-09-15T23:59:59.000Z

303

High gain x-ray lasers pumped by transient collisional excitation  

Science Conference Proceedings (OSTI)

We present recent results of x-ray laser amplification of spontaneous emission in Ne-like and Ni-like transient collisional excitation schemes. The plasma formation, ionization and collisional excitation can be optimized using two laser pulses of 1 ns and 1 ps duration at table-top energies of 5 J in each beam. High gain of 35 cm{sup -1} has been measured on the 147 {Angstrom} 4d{r_arrow}4p J=0{r_arrow}1 transition of Ni-like Pd and is a direct consequence of the nonstationary population inversion produced by the high intensity picosecond pulse. We report the dependence of the x-ray laser line intensity on the laser plasma conditions and compare the experimental measurements with hydrodynamic and atomic kinetics simulations for Ne-like and Ni-like lasing.

Dunn, J., LLNL

1998-06-16T23:59:59.000Z

304

Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash  

DOE Patents (OSTI)

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points. 2 figs.

Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

1997-10-28T23:59:59.000Z

305

Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash  

DOE Patents (OSTI)

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points.

Liskowitz, John W. (Belle Mead, NJ); Wecharatana, Methi (Parsippany, NJ); Jaturapitakkul, Chai (Bangkok, TH); Cerkanowicz, deceased, Anthony E. (late of Livingston, NJ)

1997-01-01T23:59:59.000Z

306

Non-OPEC oil supply gains to outpace demand in 1997  

SciTech Connect

Rising oil supplies in 1997 will relax some of the market tightness that drove up crude prices last year. Worldwide demand for petroleum products in 1996 rose faster than anticipated and faster than supply from outside the Organization of Petroleum Exporting Countries. This increased demand for OPEC oil and pushed up prices for crude. At year end, the world export price of crude was up more than 25% from the same period a year earlier. Market conditions will change in 1997. While worldwide economic growth will continue to boost demand for energy and petroleum, non-OPEC petroleum supply will grow even more. Increases in North Sea and Latin American production will help boost non-OPEC output by 1.9 million b/d. And revenues from 1996 production gains will make additional investment possible in exploration and production. The paper discusses world economic growth, world oil demand, worldwide supply, supply outlook, prices and international drilling.

Beck, R.J.

1997-01-27T23:59:59.000Z

307

Internal conversion coefficients in (134)Cs, (137)Ba, and (139)La: A precise test of theory  

E-Print Network (OSTI)

Recently we measured the ratio of K-shell internal conversion coefficients, alpha(K), for the 127.5-keV E3 transition in (134)Cs and the 661.7-keV M4 transition in (137)Ba. We here report a measurement of the 165.9-keV M1 transition in (139)La, based on which we convert our earlier ratio measurement into individual aK values for the transitions in (134)Cs and (137)Ba. These results continue to confirm the Dirac-Fock calculations of internal conversion coefficients that incorporate the atomic K-shell vacancy.

Nica, N.; Hardy, John C.; Iacob, V. E.; Balonek, C.; Trzhaskovskaya, M. B.

2008-01-01T23:59:59.000Z

308

Four-button BPM coefficients in cylindrical and elliptic beam chambers.  

Science Conference Proceedings (OSTI)

Beam position monitor (BPM) coefficients are calculated from induced charges on four-button BPMs in circular and elliptic beam chambers for {gamma} >>1. Since the beam chamber cross-section for the APS storage ring is different from an exact elliptic geometry, numerical values of the BPM coefficients and their inversions are computed from two-dimensional electrostatic field distributions inside an exact geometry of the beam chamber. Utilizing Green's reciprocation theorem, a potential value is applied to the buttons rather than changing the beam position, and potential distributions corresponding to the beam positions are then computed.

Kim, S.H.

1999-04-08T23:59:59.000Z

309

Estimates on Green functions of second order differential operators with singular coefficients  

E-Print Network (OSTI)

We investigate the Green functions G(x,x^{\\prime}) of some second order differential operators on R^{d+1} with singular coefficients depending only on one coordinate x_{0}. We express the Green functions by means of the Brownian motion. Applying probabilistic methods we prove that when x=(0,{\\bf x}) and x^{\\prime}=(0,{\\bf x}^{\\prime}) (here x_{0}=0) lie on the singular hyperplanes then G(0,{\\bf x};0,{\\bf x}^{\\prime}) is more regular than the Green function of operators with regular coefficients.

Z. Haba

2005-04-08T23:59:59.000Z

310

The second order hydrodynamic transport coefficient $?$ for the gluon plasma from the lattice  

E-Print Network (OSTI)

The quark gluon plasma produced in heavy ion collisions behaves like an almost ideal fluid described by viscous hydrodynamics with a number of transport coefficients. The second order coefficient $\\kappa$ is related to a Euclidean correlator of the energy-momentum tensor at vanishing frequency and low momentum. This allows for a lattice determination without maximum entropy methods or modelling, but the required lattice sizes represent a formidable challenge. We calculate $\\kappa$ in leading order lattice perturbation theory and simulations on $120^3\\times 6,8$ lattices with $afuture.

Owe Philipsen; Christian Schfer

2013-11-26T23:59:59.000Z

311

Temperature-Dependent Diffusion Coefficients from ab initio Computations: Hydrogen in Nickel  

DOE Green Energy (OSTI)

The temperature-dependent mass diffusion coefficient is computed using transition state theory. Ab initio supercell phonon calculations of the entire system provide the attempt frequency, the activation enthalpy, and the activation entropy as a function of temperature. Effects due to thermal lattice expansion are included and found to be significant. Numerical results for the case of hydrogen in nickel demonstrate a strong temperature dependence of the migration enthalpy and entropy. Trapping in local minima along the diffusion path has a pronounced effect especially at low temperatures. The computed diffusion coefficients with and without trapping bracket the available experimental values over the entire temperature range between 0 and 1400 K.

E Wimmer; W Wolf; J Sticht; P Saxe; C Geller; R Najafabadi; G Young

2006-03-16T23:59:59.000Z

312

A degree-day method for residential heating load calculations specifically incorporating the utilization of solar gains  

DOE Green Energy (OSTI)

A simple and well known method of estimating residential heating loads is the variable base degree-day method, in which the steady-state heat loss rate (UA) is multiplied by the degree-days based from the balance temperature of the structure. The balance temperature is a function of the UA as well as the average rate of internal heat gains, reflecting the displacement of the heating requirements by these gains. Currently, the heat gains from solar energy are lumped with those from appliances to estimate an average rate over the day. This ignores the effects of the timing of the gains from solar energy, which are more highly concentrated during daytime hours, hence more frequently exceeding the required space heat and less utilizable than the gains from appliances. Simulations or specialized passive solar energy calculation methods have previously been required to account for this effect. This paper presents curves of the fraction of the absorbed solar energy utilized for displacement of space heat, developed by comparing heating loads calculated using a variable base degree-day method (ignoring solar gains) to heating loads from a large number of detailed DOE-2 simulations. The difference in the loads predicted by the two methods can be interpreted as the utilized solar gains. The solar utilization decreases as the thermal integrity increases, as expected, and the solar utilizations are similar across climates. They can be used to estimate the utilized fraction of the absorbed solar energy and, with the load predicted by the variable base degree-day calculation, form a modified degree-day method that closely reproduces the loads predicted by the DOE-2 simulation model and is simple enough for hand calculations. 6 refs., 6 figs., 2 tabs.

Lucas, R.G.; Pratt, R.G.

1990-09-01T23:59:59.000Z

313

California | Department of Energy  

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

4, 2010 4, 2010 CX-003570: Categorical Exclusion Determination R10 Heat Mirror Technology with Optimized Solar Heat Gain Coefficient CX(s) Applied: B3.6 Date: 08/24/2010 Location(s): Palo Alto, California Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory August 24, 2010 CX-003510: Categorical Exclusion Determination Sulfur Based Thermochemical Heat Storage for Based Load Concentrated Solar Power Generation CX(s) Applied: A9, B3.6 Date: 08/24/2010 Location(s): California Office(s): Energy Efficiency and Renewable Energy, Golden Field Office August 18, 2010 CX-003481: Categorical Exclusion Determination California - City - Compton CX(s) Applied: A9, A11, B2.5, B5.1 Date: 08/18/2010 Location(s): Compton, California Office(s): Energy Efficiency and Renewable Energy

314

RATE COEFFICIENTS FOR THE COLLISIONAL EXCITATION OF MOLECULES: ESTIMATES FROM AN ARTIFICIAL NEURAL NETWORK  

Science Conference Proceedings (OSTI)

An artificial neural network (ANN) is investigated as a tool for estimating rate coefficients for the collisional excitation of molecules. The performance of such a tool can be evaluated by testing it on a data set of collisionally induced transitions for which rate coefficients are already known: the network is trained on a subset of that data set and tested on the remainder. Results obtained by this method are typically accurate to within a factor of approx2.1 (median value) for transitions with low excitation rates and approx1.7 for those with medium or high excitation rates, although 4% of the ANN outputs are discrepant by a factor of 10 or more. The results suggest that ANNs will be valuable in extrapolating a data set of collisional rate coefficients to include high-lying transitions that have not yet been calculated. For the asymmetric top molecules considered in this paper, the favored architecture is a cascade-correlation network that creates 16 hidden neurons during the course of training, with three input neurons to characterize the nature of the transition and one output neuron to provide the logarithm of the rate coefficient.

Neufeld, David A. [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States)

2010-01-01T23:59:59.000Z

315

Relaxation Time Constants and Apparent Diffusion Coefficients of Rat Retina at 7 Tesla  

E-Print Network (OSTI)

Relaxation Time Constants and Apparent Diffusion Coefficients of Rat Retina at 7 Tesla Govind Nair* and ADC of the rat eyes were measured at 50 3 50 3 800 lm at 7 Tesla. Profiles of T1, T2, T2* and ADC

Duong, Timothy Q.

316

Experimental determination of dynamic force coefficients of a pocket damper seal at higher frequencies  

E-Print Network (OSTI)

Experimental results are presented for a two-bladed pocket damper seal (PDS) with eight partition walls on a high-speed test rig. The objective of these experiments is to measure damping coefficients, stiffness coefficients and leakage rates at higher frequencies than tested previously. The seal coefficients are determined by measuring the logarithmic decrement and damped natural frequency in non-rotating free vibration tests and by computer simulations of these results using a computer program called XLTRC. Rotating tests, which consist of coastdown tests from 14000 rpm to 0 rpm were also conducted to corroborate the effectiveness of the PDS in suppressing the vibration amplitudes at the critical speeds. The initial rotating tests on the originally designed PDS were discouraging, and highlight the importance of the optimum design of the inlet plenum chamber of the PDS in producing damping. Suitable modifications are carried out in the PDS inlet plenum design and the non-rotating tests were repeated on the modified PDS. These tests show positive damping and negative stiffness in both the horizontal and vertical directions. The tests also show that the magnitude of both the damping and the stiffness coefficients increase with the inlet pressure. The rotating tests corroborate the effectiveness of the PDS in suppressing the vibration at critical speeds around 13,000 cpm, which is about twice the frequencies tested previously. Subsequently a comparison is made with the predictions from previous pocket damper seal codes.

Sharma, Ashish

2001-01-01T23:59:59.000Z

317

Daylighting coefficient of utilization tables. Final report, February-August 1983  

SciTech Connect

Use of daylighting coefficient of utilization tables provides a simple methodology for predicting interior illumination from daylight through windows. Tables are provided for transparent windows, and for windows with vertical and horizontal venetian blinds. The method predicts illuminance at five predefined target points within the room. The source code for the computer program which created the tables is included.

Brackett, W.E.

1983-08-01T23:59:59.000Z

318

Hydrocarbon rate coefficients for proton and electron impact ionization, dissociation, and recombination in a hydrogen plasma.  

DOE Green Energy (OSTI)

We estimate cross sections and rate coefficients for proton and electron impact ionization, dissociation, and recombination of neutral and ionized hydrocarbon molecules and fragments of the form C{sub x}H{sub y}{sup k}, x = 1-3, y = 1-6, k = 0,1 in a thermalized hydrogen-electron plasma.

Alman, D.A.; Brooks, J.N.; Ruzic, D.N.; Wang, Z.

1999-07-21T23:59:59.000Z

319

Revisiting the Definition of the Drag Coefficient in the Marine Atmospheric Boundary Layer  

Science Conference Proceedings (OSTI)

A new functional form of the neutral drag coefficient for moderate to high wind speeds in the marine atmospheric boundary layer for a range of field measurements as reported in the literature is proposed. This new form is found to describe a wide ...

Richard J. Foreman; Stefan Emeis

2010-10-01T23:59:59.000Z

320

Low Complexity Video Compression Using Moving Edge Detection Based on DCT Coefficients  

Science Conference Proceedings (OSTI)

In this paper, we propose a new low complexity video compression method based on detecting blocks containing moving edges using only DCT coefficients. The detection, whilst being very efficient, also allows efficient motion estimation by constraining ... Keywords: DCT, Low complexity video compression, Moving edge

Chanyul Kim; Noel E. O'Connor

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Research for the Crane Boom Length Coefficient Considering the Tower Head Flexibility in Rotary Plane  

Science Conference Proceedings (OSTI)

When the crane boom length in rotary plane is determined, the traditional methods only consider support condition, non-uniform, boom end lateral displacement constraint effect of amplitude dragline and hoist rope tensile forces. Ignoring tower head elastic ... Keywords: Equivalent elastic support method, Rotary plane, Tower head flexibility, Non-conservative loading, Length coefficient

Zhang Guangyun; Lan Peng; Lu Nianli

2011-01-01T23:59:59.000Z

322

Transport coefficients of causal dissipative relativistic hydrodynamics in quenched lattice simulations  

E-Print Network (OSTI)

Transport coefficients of causal dissipative relativistic fluid dynamics (CDR) are studied in quenched lattice simulations. CDR describes the behavior of relativistic non-Newtonian fluids in which the relaxation time appears as a new transport coefficient besides the shear and bulk viscosities. It was recently shown that these coefficients can be given by the temporal-correlation functions of the energy-momentum tensors as in the case of the Green-Kubo-Nakano formula. By using the new formula in CDR, we study the transport coefficients with lattice simulations in pure SU(3) gauge theory. After defining the energy-momentum tensor on the lattice, we extract a ratio of the shear viscosity to the relaxation time which is given only in terms of the static correlation functions. The simulations are performed on $24^3 \\times 4$--16 lattices with $\\beta_{_{\\rm LAT}} = 6.0$, which corresponds to the temperature range of $0.5 \\simle T/T_c \\simle 1.8$, where $T_c$ is the critical temperature.

Yu Maezawa; Hiroaki Abuki; Tetsuo Hatsuda; Tomoi Koide

2010-12-10T23:59:59.000Z

323

A fast iterative solver for the variable coefficient diffusion equation on a disk  

Science Conference Proceedings (OSTI)

We present an efficient iterative method for solving the variable coefficient diffusion equation on a unit disk. The equation is written in polar coordinates and is discretized by the standard centered difference approximation under the grid arrangement ... Keywords: Ginzburg-Landau vortices, iterative method, polar coordinates, variable diffusion equation

Ming-Chih Lai; Yu-Hou Tseng

2005-09-01T23:59:59.000Z

324

ATMOSPHERIC DISPERSION COEFFICIENTS AND RADIOLOGICAL AND TOXICOLOGICAL EXPOSURE METHODOLOGY FOR USE IN TANK FARMS  

Science Conference Proceedings (OSTI)

This report presents the atmospheric dispersion coefficients used in Tank Farms safety analysis. The basis equations for calculating radiological and toxicological exposures are also included. In this revision, the time averaging for toxicological consequence evaluations is clarified based on a review of DOE complex guidance and a review of tank farm chemicals.

GRIGSBY KM

2011-04-07T23:59:59.000Z

325

profiles of optical Extinction Coefficients Calculated from Droplet Spectra Observed in Marine Stratus Cloud Layers  

Science Conference Proceedings (OSTI)

Airborne measurements of droplet spectra n(r) where r is droplet radius were made in stratus cloud layers over the ocean 130 km southwest of San Diego. Optical extinction coefficients ?e were calculated at selected wavelengths (?= 0.53, 3.75 and ...

V. Ray Noonkester

1985-06-01T23:59:59.000Z

326

Development of a Method for Measuring the Moderator Temperature Coefficient by Noise Analysis and Its Experimental  

E-Print Network (OSTI)

of Technology, Department of Reactor Physics SE-41296 Gothenburg, Sweden Received February 6, 2003 Accepted if the reactor can be operated until its expected EOC. According to the newest U.S. standard, the MTC is definedDevelopment of a Method for Measuring the Moderator Temperature Coefficient by Noise Analysis

Demazière, Christophe

327

Inversion of Robin coefficient by a spectral stochastic finite element approach  

Science Conference Proceedings (OSTI)

This paper investigates a variational approach to the nonlinear stochastic inverse problem of probabilistically calibrating the Robin coefficient from boundary measurements for the steady-state heat conduction. The problem is formulated into an optimization ... Keywords: Conjugate gradient method, Robin inverse problem, Spectral stochastic finite element method, Stochastic inverse problems, Uncertainty quantification

Bangti Jin; Jun Zou

2008-03-01T23:59:59.000Z

328

Adaptive Algebraic Multigrid for Finite Element Elliptic Equations with Random Coefficients  

Science Conference Proceedings (OSTI)

This thesis presents a two-grid algorithm based on Smoothed Aggregation Spectral Element Agglomeration Algebraic Multigrid (SA-{rho}AMGe) combined with adaptation. The aim is to build an efficient solver for the linear systems arising from discretization of second-order elliptic partial differential equations (PDEs) with stochastic coefficients. Examples include PDEs that model subsurface flow with random permeability field. During a Markov Chain Monte Carlo (MCMC) simulation process, that draws PDE coefficient samples from a certain distribution, the PDE coefficients change, hence the resulting linear systems to be solved change. At every such step the system (discretized PDE) needs to be solved and the computed solution used to evaluate some functional(s) of interest that then determine if the coefficient sample is acceptable or not. The MCMC process is hence computationally intensive and requires the solvers used to be efficient and fast. This fact that at every step of MCMC the resulting linear system changes, makes an already existing solver built for the old problem perhaps not as efficient for the problem corresponding to the new sampled coefficient. This motivates the main goal of our study, namely, to adapt an already existing solver to handle the problem (with changed coefficient) with the objective to achieve this goal to be faster and more efficient than building a completely new solver from scratch. Our approach utilizes the local element matrices (for the problem with changed coefficients) to build local problems associated with constructed by the method agglomerated elements (a set of subdomains that cover the given computational domain). We solve a generalized eigenproblem for each set in a subspace spanned by the previous local coarse space (used for the old solver) and a vector, component of the error, that the old solver cannot handle. A portion of the spectrum of these local eigen-problems (corresponding to eigenvalues close to zero) form the coarse basis used to define the new two-level method of our interest. We illustrate the performance of this adaptive two-level procedure with a large set of numerical experiments that demonstrate its efficiency over building the solvers from scratch.

Kalchev, D

2012-04-02T23:59:59.000Z

329

Preliminary analysis of gain measurements at the HFBR liquid hydrogen moderator  

DOE Green Energy (OSTI)

The High Flux Beam Reactor (HFBR) is a 60 MW steady state neutron source. As part of the facility a cold neutron source is included in one of the beam tubes (H-9). The arrangement of this source is shown in Figure 1, which shows the reactor core, beam tube H-9, and the cold source with its attached helium cooling lines and hydrogen feed lines. The liquid hydrogen chamber is in the shape of an oblate spheroid and has a volume of 1.466 liters, and an aspect ratio of 1:3. Aluminum is used as the material of construction. The wall thickness of the chamber varies, with the thinnest value being on the flatter parts of the oblate spheroid. This design minimizes the amount of metal in the direction of the neutron beam of interest. Gain is defined as the ratio of the flux at a specific wave length leaking from the front face of the cold source, with and without the liquid hydrogen present. Measurements of the gain were made at several wavelength for the HFBR cold source. The change in the neutron spectrum at a particular wave length is a strong function of the scattering kernel of the moderator. Thus, these measurements can be used as integral data to validate calculational models and scattering kernel data for liquid hydrogen, and shed light on the actual mixture of ortho/para hydrogen in the cold source. Two scattering kernels for each of the states of liquid hydrogen (ortho and para) were available at the beginning of the study. The total scattering cross section for each of these are shown. The two ortho kernels are seen to be quite similar. However, in the case of para-hydrogen there is seen to be a significant difference between the two cross sections at lower energies or longer wavelengths. This difference implies a similar difference in the scattering kernel. In the following analysis both para-hydrogen kernels and only one ortho-hydrogen kernel will be used. In addition, a free proton gas kernel (no molecular binding) will be used for comparison purposes.

Ludewig, H.; Aronson, A.; Todosow, M.; Passell, L.; Wildgruber, U.

1998-05-01T23:59:59.000Z

330

Semi-empirical method for estimating the performance of direct gain passive solar heated buildings  

DOE Green Energy (OSTI)

The sunspot code for performance analysis of direct gain passive solar heated buildings is used to calculate the annual solar fraction for two representative designs in ten American cities. The two representative designs involve a single thermal storage mass configuration which is evaluated with and without night insulation. In both cases the solar aperture is double glazed. The results of the detailed thermal network calculations are then correlated using the monthly solar load ratio method which has already been successfully applied to the analysis of both active solar heated buildings and passive thermal storage wall systems. The method is based on a correlation between the monthly solar heating fraction and the monthly solar load ratio. The monthly solar load ratio is defined as the ratio of the monthly solar energy transmitted through the glazing aperture to the building's monthly thermal load. The procedure using the monthly method for any location is discussed in detail. In addition, a table of annual performance results for 84 cities is presented, enabling the designer to bypass the monthly method for these locations.

Wray, W.O.; Balcomb, J.D.; McFarland, R.D.

1979-01-01T23:59:59.000Z

331

The eect of fast food restaurants on obesity and weight gain  

E-Print Network (OSTI)

We investigate how changes in the supply of fast food restaurants affect weight outcomes of 3 million children and 3 million pregnant women. Among ninth graders, a fast food restaurant within 0.1 miles of a school results in a 5.2 percent increase in obesity rates. Among pregnant women, a fast-food restaurant within 0.5 miles of residence results in a 1.6 percent increase in the probability of gaining over 20 kilos. The implied effects on caloric intake are one order of magnitude larger for children than for mothers, consistent with smaller travel cost for adults. Non-fast food restaurants and future fast-food restaurants are uncorrelated with weight outcomes. (JEL I12, J13, J16, L83) In the public debate over obesity it is often assumed the widespread availability of fast food restaurants is an important determinant of obesity rates. Policy makers in several cities have responded by restricting the availability or content of fast food, or by requiring posting of the caloric content of the meals (Julie Samia Mair, Matthew

Janet Currie; Stefano Dellavigna; Enrico Moretti; Vikram Pathania

2010-01-01T23:59:59.000Z

332

Variable-speed blower motors gaining ground in residential HVAC market  

SciTech Connect

Variable-speed blowers with electronically commutated permanent-magnet motors are gaining ground in the residential forced-air HVAC market. Variable-speed blower motors offer better comfort, better air mixing, lower noise, and tighter temperature and humidity control, as well as higher efficiency and lower peak demand than the constant-speed blower motors installed in most standard systems. Although these benefits cost considerably more up front, some homeowners think the extra cost is justified. Sales are increasing dramatically, and although variable-speed units made up less than three percent of the market in 1993, industry representatives predict that variable-speed blower motors may become the standard within ten to twenty years. The benefits of variable-speed gas furnaces also open up the potential for collaboration between gas and electric utilities. The best way for an electric utility to encourage customers to consider variable-speed gas furnaces may be through the gas utility, since homeowners look to the gas utility when it`s time to make a decision about a gas furnace purchase. Gas utilities can also benefit from variable speed by providing their customers better comfort, and possibly by reducing the customer`s gas bill (due to zoning or better control).

Gregerson, J.

1994-12-31T23:59:59.000Z

333

Effects of dietary calcium and cholecalciferol on weight gain and mineral composition of the blue tilapia  

E-Print Network (OSTI)

Interactions of dietary calcium and cholecalciferol (vitamin D3) were evaluated with fingerling blue tilapia using a 2 x 2 factorial design. Four purified diets were formulated to contain 34% crude protein from egg albumin and 3.20 kcal available energy/g. The basal diet (0.02% Ca) was supplemented with either 0 or 0.75% Ca (from CaC'2-2H,O) and 0 or 2,000 IU vitamin D3/kg in a factorial arrangement. Experimental diets were fed in triplicate to groups of blue tilapia initially averaging 2.30 ?0.09 g in 38-1 aquaria receiving water with 0.1 mg Ca/l for a period of 36 weeks. Significantly (P < 0.05) greater weight gain, bone and scale calcium, as well as bone and scale phosphorus values were observed for fish fed the calciumsupplemented diets as compared to fish fed the diets without supplemental. calcium. Supplementation of vitamin D3 produced some significant differences in these parameters, however; the differences were not consistent for all sampling periods. Based on these results, it is concluded that dietary calcium had the most profound effects on growth and mineral composition of the blue tilapia and effects of vitamin D3 were more subtle.

O'Connell, John Patrick

1993-01-01T23:59:59.000Z

334

Plasma density measurements and the behavior of transport coefficients during adiabatic compression in the Tuman-2 tokamak  

SciTech Connect

Data on the electon density obtained during experiments on the compression of toroidal plasmas is analysed, and the transport coefficients are evaluated and discussed. (AIP)

Ipatov, V.A.; Kalmykov, S.G.; Lipin, B.M.

1980-10-01T23:59:59.000Z

335

Input--output capital coefficients for energy technologies. [Input-output model  

DOE Green Energy (OSTI)

Input-output capital coefficients are presented for five electric and seven non-electric energy technologies. They describe the durable goods and structures purchases (at a 110 sector level of detail) that are necessary to expand productive capacity in each of twelve energy source sectors. Coefficients are defined in terms of 1967 dollar purchases per 10/sup 6/ Btu of output from new capacity, and original data sources include Battelle Memorial Institute, the Harvard Economic Research Project, The Mitre Corp., and Bechtel Corp. The twelve energy sectors are coal, crude oil and gas, shale oil, methane from coal, solvent refined coal, refined oil products, pipeline gas, coal combined-cycle electric, fossil electric, LWR electric, HTGR electric, and hydroelectric.

Tessmer, R.G. Jr.

1976-12-01T23:59:59.000Z

336

Lattice polytopes having h?-polynomials with given degree and linear coefficient  

E-Print Network (OSTI)

The h?-polynomial of a lattice polytope is the numerator of the generating function of the Ehrhart polynomial. Let P be a lattice polytope with h?-polynomial of degree d and with linear coefficient h ? 1. We show that P has to be a lattice pyramid over a lower-dimensional lattice polytope, if the dimension of P is greater or equal to h ? 1 (2d + 1) + 4d ? 1. This result has a purely combinatorial proof and generalizes a recent theorem of Batyrev. As an application we deduce from an inequality due to Stanley that the volume of a lattice polytope is bounded by a function depending only on the degree and the two heighest non-zero coefficients of the h?-polynomial.

Benjamin Nill

2007-01-01T23:59:59.000Z

337

"Problem-based Learning: helping your students gain the most from PBL" 3rd edition, Instructor's Guide for "Problem-based Learning: how to gain the most from PBL" ISBN  

E-Print Network (OSTI)

"Problem-based Learning: helping your students gain the most from PBL" 3rd edition, March 1996 the students to learn. Don't be afraid to integrate subject material across disciplines. ·Pose the problem-1 purposely paints a very black and white picture. In truth, I think both programs are somewhere between

Thompson, Michael

338

Prediction of the Environmental Mobility of Arsenic: Selection and Use of Partitioning Coefficients  

Science Conference Proceedings (OSTI)

Arsenic migration is slower than water movement in groundwater environments. As a result, prediction of groundwater arsenic migration requires knowledge of the difference in these transport rates -- defined as the retardation factor. A crucial part of the definition of the retardation factor is the partition coefficient, Kd. Because retardation is a required input for contaminant transport calculations and modeling, Kd must be known, assumed, or estimated to predict retardation. Two fundamental approache...

2002-11-01T23:59:59.000Z

339

Predicting makeup torque of threaded tapered connections and evaluation of coefficients of friction  

SciTech Connect

This paper will show how it is possible to generate a general purpose formula to determine the amount of torque required to make up non-shouldering tapered threaded connections as are commonly used on tubing and casing connections. In addition, by manipulating this algorithm, values for the dynamic coefficient of friction of thread compounds may be derived. This algorithm allows any type of thread form to be analyzed and was verified through actual testing.

Hawke, M.C.

1984-09-01T23:59:59.000Z

340

Extended TOPSIS with Correlation Coefficient of Triangular Intuitionistic Fuzzy Sets for Multiple Attribute Group Decision Making  

Science Conference Proceedings (OSTI)

This paper extends the technique for order preference by similarity to ideal solution TOPSIS for solving multi-attribute group decision making MAGDM problems under triangular intuitionistic fuzzy sets by using its correlation coefficient. In situations ... Keywords: Correlation of Triangular Intuitionistic Fuzzy Number, Multi-Attribute Group Decision Making MAGDM, TOPSIS, Triangular Intuitionistic Fuzzy Hybrid Aggregation TIFHA Operator, Triangular Intuitionistic Fuzzy Ordered Weighted Averaging TIFOWA Operator

John Robinson P.; Henry AmirtharajE. C.

2011-07-01T23:59:59.000Z

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341

On the Green-Kubo relationship of the liquid-solid friction coefficient  

E-Print Network (OSTI)

In this paper, we propose a new derivation for the Green-Kubo relationship for the liquid-solid friction coefficient, characterizing hydrodynamic slippage at a wall. It is based on a general Langevin approach for the fluctuating wall velocity, involving a non-markovian memory kernel with vanishing time integral. The calculation highlights some subtleties of the wall-liquid dynamics, leading to superdiffusive motion of the fluctuating wall position.

Lydric Bocquet; Jean-Louis Barrat

2013-06-10T23:59:59.000Z

342

The limiting mutual diffusion coefficients of Fischer-Tropsch synthesis products in near-critical hydrocarbons  

E-Print Network (OSTI)

The Fischer-Tropsch synthesis (FTS) is used to convert synthesis gas into petroleum products such as gasoline and diesel fuel. It was developed in Germany during WW 11 as an alternative fuel source during the fuel embargo and is still used as a major source of fuel in South Africa. The objective of our work will be to run the reaction in the supercritical region with a hydrocarbon solvent in order to utilize the advantages of supercritical fluids (SCFs). SCFs have the advantages of high diffusivities, low viscosities, and increased mass transfer. Effective pore diffusivities for the reactants and reaction products become important when modeling the reaction. One of the most important factors in determining effective diffusivities is the molecular diffusivity of the organic in the supercritical fluid. However, data for diffusivities in supercritical fluids are scarce. Because diffusion coefficients cannot be determined a priofi, it is necessary to measure them. We have utilized the Taylor dispersion technique to measure the limiting mutual diffusion coefficients of some FTS products, namely 1-octene and 1-tetradecene, in subcritical and supercritical ethane and propane in the temperature range 293.2-338.25 K and the pressure range 55.2-110.3 bar. It has been found that diffusion coefficients are a strong function of the solvent density and the molecular weight and diameter of the solute and solvent. We have correlated the data to predict the diffusion coefficients using the rough-hard-spheres (RHS) theory; however, it has been found that this theory underpredicts the data. Therefore, we have used modifications to the RHS theory of diffusion by Sung and Stell (1984) to better predict the data. These modifications to the RHS theory predict the data we obtained within the experimental limits.

Noel, James Michael

1994-01-01T23:59:59.000Z

343

Layered ultra-thin coherent structures used as electrical resistors having low temperature coefficient of resistivity  

DOE Patents (OSTI)

A thin film resistor having a controlled temperature coefficient of resistance (TCR) ranging from negative to positive degrees kelvin and having relatively high resistivity. The resistor is a multilayer superlattice crystal containing a plurality of alternating, ultra-thin layers of two different metals. TCR is varied by controlling the thickness of the individual layers. The resistor can be readily prepared by methods compatible with thin film circuitry manufacturing techniques.

Werner, Thomas R. (Argonne, IL); Falco, Charles M. (Tucson, AZ); Schuller, Ivan K. (Woodridge, IL)

1984-01-01T23:59:59.000Z

344

Gains From Real-Time Tracking of Prostate Motion During External Beam Radiation Therapy  

SciTech Connect

Purpose: To study the gains from real-time tracking of prostate motion and threshold-based intervention and the feasibility of margin reduction for external beam radiation therapy of prostate cancer. Methods and Materials: Prostate intrafractional motion data from 775 randomly selected treatment fractions (105 prostate patients) were analyzed. Statistical distributions of prostate intrafractional displacement from baseline were used for treatment margin calculation together with other geometrical uncertainties for all patients and a subset of 7 patient who exhibited the largest intrafractional motion. Compared with treatment without any intrafractional intervention, potential reductions in treatment margins were evaluated for treatments with 5-mm and 3-mm threshold-based intervention and four-dimensional (4D) treatments with and without prostate rotation correction. Results: The percentage of time of prostate displacement from the baseline by 3 mm and 5 mm in any direction was 13.4% and 1.8%, respectively, for the general patient population. The ratios were 41% and 15% for the 7 selected patients. Reductions in the posterior margin were 0.2, 0.5, 1.3, and 3.1 mm from the original 7.7 mm, respectively, for 5-mm and 3-mm threshold-based treatments and 4D treatments with and without prostate rotation correction for all patients. They were 1.3, 1.9, 3.1 and 4.9 mm from the original 9.5 mm, corresponding to the 7 selected patients. The treatment margin reductions in other directions were even smaller. Conclusions: Real-time motion tracking and threshold-based intrafractional intervention may play a significant roll in treatment margin reduction for a small fraction of patients but not for the general patient population. Four-dimensional treatments with prostate rotation correction can reduce the treatment margin more significantly.

Li Jinsheng, E-mail: jinsheng.li@fccc.ed [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States); Jin Lihui; Pollack, Alan; Horwitz, Eric M.; Buyyounouski, Mark K.; Price, Robert A.; Ma Changming [Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States)

2009-12-01T23:59:59.000Z

345

Gain-offunction mutations reveal expanded intermediate states and a sequential action of two gates in  

E-Print Network (OSTI)

abstract The tension-driven gating transition in the large mechanosensitive channel MscL proceeds through detectable states of intermediate conductance. Gain-of-function (GOF) mutants with polar or charged substitutions in the main hydrophobic gate display altered patterns of subconducting states, providing valuable information about gating intermediates. Here we present thermodynamic analysis of several GOF mutants to clarify the nature and position of low-conducting conformations in the transition pathway. Unlike wild-type (WT) MscL, which predominantly occupies the closed and fully open states with very brief substates, the mild V23T GOF mutant frequently visits a multitude of short-lived subconducting states. Severe mutants V23D and G22N open in sequence: closed (C) ? low-conducting substate (S) ? open (O), with the first subtransition occurring at lower tensions. Analyses of equilibrium state occupancies as functions of membrane tension show that the C?S subtransition in WT MscL is associated with only a minor conductance increment, but the largest in-plane expansion and free energy change. The GOF substitutions strongly affect the first subtransition by reducing area (?A) and energy (?E) changes between C and S states commensurably with the severity of mutation. GOF mutants also exhibited a considerably larger ?E associated with the second (S?O) subtransition, but a ?A similar to WT. The area changes indicate that closed conformations of GOF mutants are physically preexpanded. The tension dependencies of rate constants for channel closure (k off) predict different positions of rate-limiting barriers on the energy-area profiles

Andriy Anishkin; Chien-sung Chiang; Sergei Sukharev

2005-01-01T23:59:59.000Z

346

Evaluation of the coolant reactivity coefficient influence on the dynamic response of a small LFR system  

Science Conference Proceedings (OSTI)

An assessment of the coolant reactivity feedback influence on a small Lead-cooled Fast Reactor (LFR) dynamics has been made aimed at providing both qualitative and quantitative insights into the system transient behavior depending on the sign of the above mentioned coefficient. The need of such an investigation has been recognized since fast reactors cooled by heavy liquid metals show to be characterized by a strong coupling between primary and secondary systems. In particular, the coolant density and radial expansion coefficients have been attested to play a major role in determining the core response to any perturbed condition on the Steam Generator (SG) side. The European Lead-cooled System (ELSY)-based demonstrator (DEMO) has been assumed as the reference LFR case study. As a first step, a zero-dimensional dynamics model has been developed and implemented in MATLAB/SIMULINK{sup R} environment; then typical transient scenarios have been simulated by incorporating the actual negative lead density reactivity coefficient and its opposite. In all the examined cases results have shown that the reactor behaves in a completely different way when considering a positive coolant feedback instead of the reference one, the system free dynamics resulting moreover considerably slower due to the core and SG mutually conflicting reactions. The outcomes of the present analysis may represent a useful feedback for both the core and the control system designers. (authors)

Lorenzi, S.; Bortot, S.; Cammi, A.; Ponciroli, R. [Dept. of Energy, Nuclear Engineering Div. - CeSNEF, Politecnico di Milano, Via La Masa 34, 20156 Milano (Italy)

2012-07-01T23:59:59.000Z

347

Incorporation of Stratification Effects on the Oceanic Roughness Length in the Derivation of the Neutral Drag Coefficient  

Science Conference Proceedings (OSTI)

Based on the assumption that, over the sea, the roughness length of the wind profile scales with the wind stress, a new formulation that describes the drag coefficient as a function of the given neutral drag coefficient and stability is derived. ...

Gerald Geernaert; Kristina B. Katsaros

1986-09-01T23:59:59.000Z

348

A Cartesian grid embedded boundary method for solving the Poisson and heat equations with discontinuous coefficients in three dimensions  

Science Conference Proceedings (OSTI)

We present a method for solving Poisson and heat equations with discontinuous coefficients in two- and three-dimensions. It uses a Cartesian cut-cell/embedded boundary method to represent the interface between materials, as described in Johansen and ... Keywords: Discontinuous coefficient, Finite volume methods, Heat equation, Irregular domain, Jump conditions, Multigrid methods

R. K. Crockett; P. Colella; D. T. Graves

2011-04-01T23:59:59.000Z

349

Direct Nyquist array design of PID controllers for boiler-turbine units based on gain and phase margins  

Science Conference Proceedings (OSTI)

In this paper, a direct Nyquist array (DNA) method for the design of PID controllers for multivariable boiler-turbine units with specifications of gain and phase margins is proposed. The essential objective is to propose a method for the design and auto-tuning ...

Hui Pan; Minrui Fei; Ling Wang; Kang Li; Lin Qian

2012-03-01T23:59:59.000Z

350

Measuring Potential Efficiency Gains from Deregulation of Electricity Generation: A Bayesian Author(s): Andrew N. Kleit and Dek Tecrell  

E-Print Network (OSTI)

. Given the highly seasonal and time-specific demand for electricity, achieving the optimal scale may and Electricity Demand: Allowing for Selection Bias in Experimental Data," Rand Journal of Economics 28(0) (1997Measuring Potential Efficiency Gains from Deregulation of Electricity Generation: A Bayesian

Najjar, Raymond

351

Evaluation of solar gain through skylights for inclusion in the SP53 residential building loads data base  

DOE Green Energy (OSTI)

The energy performance of skylights is similar to that of windows in admitting solar heat gain, while at the same time providing a pathway for convective and conductive heat transfer through the building envelope. Since skylights are typically installed at angles ranging from 0{degrees} to 45{degrees}, and differ from windows in both their construction and operation, their conductive and convective heat gains or losses, as well as solar heat gain, will differ for the same rough opening and thermal characteristics. The objective of this work is to quantify the impact of solar gain through skylights on building heating and cooling loads in 45 climates, and to develop a method for including these data into the SP53 residential loads data base previously developed by LBL in support of DOE`s Automated Residential Energy Standard (ARES) program. The authors used the DOE-2.1C program to simulate the heating and cooling loads of a prototypical residential building while varying the size and solar characteristics of skylights and windows. The results are presented as Skylight Solar Loads, which are the contribution of solar gains through skylights to the overall building heating and cooling loads, and as Skylight Solar Load Ratios, which are the ratios of skylight solar loads to those for windows with the same orientation. The study shows that skylight solar loads are larger than those for windows in both heating and cooling. Skylight solar cooling loads are from three to four times greater than those for windows regardless of the skylight tilt, except for those facing north. These cooling loads are largest for south-facing skylights at a tilt angle of approximately 20{degrees}, and drop off at higher tilts and other orientations.

Hanford, J.W.; Huang, Y.J.

1993-12-01T23:59:59.000Z

352

Determination of kinetic coefficients for the simultaneous reduction of sulfate and uranium by Desulfovibrio desulfuricans bacteria  

Science Conference Proceedings (OSTI)

Uranium contamination of groundwaters and surface waters near abandoned mill tailings piles is a serious concern in many areas of the western United States. Uranium usually exists in either the U(IV) or the U(VI) oxidation state. U(VI) is soluble in water and, as a result, is very mobile in the environment. U(IV), however, is generally insoluble in water and, therefore, is not subject to aqueous transport. In recent years, researchers have discovered that certain anaerobic microorganisms, such as the sulfate-reducing bacteria Desulfovibrio desulfuricans, can mediate the reduction of U(VI) to U(IV). Although the ability of this microorganism to reduce U(VI) has been studied in some detail by previous researchers, the kinetics of the reactions have not been characterized. The purpose of this research was to perform kinetic studies on Desulfovibrio desulficans bacteria during simultaneous reduction of sulfate and uranium and to determine the phase in which uranium exists after it has been reduced and precipitated from solution. The studies were conducted in a laboratory-scale chemostat under substrate-limited growth conditions with pyruvate as the substrate. Kinetic coefficients for substrate utilization and cell growth were calculated using the Monod equation. The maximum rate of substrate utilization (k) was determined to be 4.70 days{sup {minus}1} while the half-velocity constant (K{sub s}) was 140 mg/l COD. The yield coefficient (Y) was determined to be 0.17 mg cells/mg COD while the endogenous decay coefficient (k{sub d}) was calculated as 0.072 days{sup {minus}1}. After reduction, U(IV) Precipitated from solution in the uraninite (UO{sub 2}) phase. Uranium removal efficiency as high as 90% was achieved in the chemostat.

Tucker, M.D.

1995-05-01T23:59:59.000Z

353

High magnetic shear gain in a liquid sodium stable couette flow experiment A prelude to an alpha - omega dynamo  

Science Conference Proceedings (OSTI)

The {Omega}-phase of the liquid sodium {alpha}-{Omega} dynamo experiment at NMIMT in cooperation with LANL has successfully demonstrated the production of a high toroidal field, B{sub {phi}} {approx_equal} 8 x B{sub r} from the radial component of an applied poloidal magnetic field, B{sub r}. This enhanced toroidal field is produced by rotational shear in stable Couette Row within liquid sodium at Rm {approx_equal} 120. The small turbulence in stable Taylor-Couette Row is caused by Ekman Row where ({delta}v/v){sup 2} {approx} 10{sup -3}. This high {Omega}-gain in low turbulence flow contrasts with a smaller {Omega}-gain in higher turbulence, Helmholtz-unstable shear flows. This result supports the ansatz that large scale astrophysical magnetic fields are created within semi-coherent large scale motions in which turbulence plays a diffusive role that enables magnetic flux linkage.

Colgate, Stirling [Los Alamos National Laboratory; Li, Jui [Los Alamos National Laboratory; Finn, John [Los Alamos National Laboratory; Pariev, Vladimir [Los Alamos National Laboratory; Beckley, Howard [NM INSTIT. OF MINING AND TECH; Si, Jiahe [NM INSTIT. OF MINING AND TECH.; Martinic, Joe [NM INSTIT. OF MINING AND TECH.; Westpfahl, David [NM INSTIT. OF TECH.; Slutz, James [NM INSTIT. OF MINING AND TECH.; Westrom, Zeb [NM INSTIT. OF TECH.; Klein, Brianna [NM INSTIT. OF MINING AND TECH.

2010-11-08T23:59:59.000Z

354

Impact of the Ga/In ratio on the N incorporation into (In,Ga)(As,N) quantum dots  

Science Conference Proceedings (OSTI)

In this work, we demonstrate the dependence of the nitrogen incorporation on the Ga/In content into (In,Ga)(As,N) quantum dots (QDs) grown on GaAs (100) by radio-frequency plasma assisted molecular beam epitaxy (MBE). Morphological analysis by atomic force microscopy and cross-sectional transmission electron microscopy, together with an estimation of the transition thickness, monitored in situ during the growth, predict a maximum in the N incorporation for 30% Ga content. This result is confirmed by photoluminescence measurements of the as-grown and post-growth annealed samples. We attribute this behavior to a trade off between two mechanisms depending on the Ga/In content: one related to the stability of the Ga-N bond, and the other related to the surface strain and/or In segregation.

Gargallo-Caballero, R.; Guzman, A.; Ulloa, J. M.; Hierro, A. [Instituto de Sistemas Optoelectronicos y Microtecnologia (ISOM)-Departamento de Ingenieria Electronica, ETSI Telecomunicacion, Universidad Politecnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid (Spain); Hopkinson, M. [Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD (United Kingdom); Luna, E.; Trampert, A. [Paul Drude Institut fuer Festkoerperelektronik, Hausvogteiplatz 5-7, 10117 Berlin (Germany)

2012-04-15T23:59:59.000Z

355

Higher Fusion Power Gain with Current and Pressure Profile Control in Strongly Shaped DIII-D Tokamak Plasmas  

Science Conference Proceedings (OSTI)

Fusion power gain has been increased by a factor of 3 in DIII-D by tailoring the pressure profile to avoid the kink instability in {ital H}-mode plasmas. The resulting plasmas are found to have neoclassical ion confinement. This reduction in transport losses in beam-heated plasmas with negative central shear is correlated with a dramatic reduction in density fluctuations. Improved magnetohydrodynamic stability is achieved by controlling the plasma pressure profile width. In deuterium plasmas the highest gain {ital Q} (the ratio of fusion power to input power), was 0.0015, corresponding to an equivalent {ital Q} of 0.32 in a deuterium-tritium plasma. {copyright} {ital 1996 The American Physical Society.}

Lazarus, E.A.; Navratil, G.A.; Greenfield, C.M.; Strait, E.J.; Austin, M.E.; Burrell, K.H.; Casper, T.A.; Baker, D.R.; DeBoo, J.C.; Doyle, E.J.; Durst, R.; Ferron, J.R.; Forest, C.B.; Gohil, P.; Groebner, R.J.; Heidbrink, W.W.; Hong, R.; Houlberg, W.A.; Howald, A.W.; Hsieh, C.; Hyatt, A.W.; Jackson, G.L.; Kim, J.; Lao, L.L.; Lasnier, C.J.; Leonard, A.W.; Lohr, J.; La Haye, R.J.; Maingi, R.; Miller, R.L.; Murakami, M.; Osborne, T.H.; Perkins, L.J.; Petty, C.C.; Rettig, C.L.; Rhodes, T.L.; Rice, B.W.; Sabbagh, S.A.; Schissel, D.P.; Scoville, J.T.; Snider, R.T.; Staebler, G.M.; Stallard, B.W.; Stambaugh, R.D.; St. John, H.E.; Stockdale, R.E.; Taylor, P.L.; Thomas, D.M.; Turnbull, A.D.; Wade, M.R.; Wood, R.; Whyte, D. [General Atomics, P.O. Box 85608, San Diego, California 92186-9784 (United States)] [General Atomics, P.O. Box 85608, San Diego, California 92186-9784 (United States)

1996-09-01T23:59:59.000Z

356

Device and method for measuring the coefficient of performance of a heat pump  

DOE Patents (OSTI)

A method and instrument is provided which allows quick and accurate measurement of the coefficient of performance of an installed electrically powered heat pump including auxiliary resistane heaters. Temperature-sensitive resistors are placed in the return and supply air ducts to measure the temperature increase of the air across the refrigerant and resistive-heating elements of the system. The voltages across the resistors which are directly proportional to the respective duct tempertures are applied to the inputs of a differential amplifier so that its output voltage is proportional to the temperature difference across the unit. A voltage-to-frequency converter connected to the output of the differential amplifier converts the voltage signal to a proportional-frequency signal. A digital watt meter is used to measure the power to the unit and produces a signal having a frequency proportional to the input power. A digital logic circuit ratios the temperature difference signal and the electric power input signal in a unique manner to produce a single number which is the coefficient of performance of the unit over the test interval. The digital logic and an in-situ calibration procedure enables the instrument to make these measurements in such a way that the ratio of heat flow/power input is obtained without computations. No specialized knowledge of thermodynamics or electrons is required to operate the instrument.

Brantley, V.R.; Miller, D.R.

1982-05-18T23:59:59.000Z

357

Device and method for measuring the coefficient of performance of a heat pump  

DOE Patents (OSTI)

A method and instrument is provided which allows quick and accurate measurement of the coefficient of performance of an installed electrically powered heat pump including auxiliary resistance heaters. Temperature sensitive resistors are placed in the return and supply air ducts to measure the temperature increase of the air across the refrigerant and resistive heating elements of the system. The voltages across the resistors which are directly proportional to the respective duct temperatures are applied to the inputs of a differential amplifier so that its output voltage is proportional to the temperature difference across the unit. A voltage-to-frequency converter connected to the output of the differential amplifier converts the voltage signal to a proportional frequency signal. A digital watt meter is used to measure the power to the unit and produces a signal having a frequency proportional to the input power. A digital logic circuit ratios the temperature difference signal and the electric power input signal in a unique manner to produce a single number which is the coefficient of performance of the unit over the test interval. The digital logic and an in-situ calibration procedure enables the instrument to make these measurements in such a way that the ratio of heat flow/power input is obtained without computations. No specialized knowledge of thermodynamics or electronics is required to operate the instrument.

Brantley, Vanston R. (Knoxville, TN); Miller, Donald R. (Kingston, TN)

1984-01-01T23:59:59.000Z

358

DISTRIBUTION AND RANGE OF RADIONUCLIDE SORPTION COEFFICIENTS IN A SAVANNAH RIVER SITE SUBSURFACE: STOCHASTIC MODELING CONSIDERATIONS  

SciTech Connect

The uncertainty associated with the sorption coefficient, or K{sub d} value, is one of the key uncertainties in estimating risk associated with burying low-level nuclear waste in the subsurface. The objective of this study was to measure >648 K{sub d} values and provide a measure of the range and distribution (normal or log-normal) of radionuclide K{sub d} values appropriate for the E-Area disposal site, within the Savannah River Site, near Aiken South Carolina. The 95% confidence level for the mean K{sub d} was twice the mean in the Aquifer Zone (18-30.5 m depth), equal to the mean for the Upper Vadose Zone (3.3-10 m depth), and half the mean for the Lower Vadose Zone (3.10-18 m depth). The distribution of K{sub d} values was log normal in the Upper Vadose Zone and Aquifer Zone, and normal in the Lower Vadose Zone. To our knowledge, this is the first report of natural radionuclide Kd variability in the literature. Using ranges and distribution coefficients that are specific to the hydrostratigraphic unit improved model accuracy and reduced model uncertainty. Unfortunately, extension of these conclusions to other sites is likely not appropriate given that each site has its own sources of hydrogeological variability. However, this study provides one of the first examples of the development stochastic ranges and distributions of K{sub d} values for a hydrological unit for stochastic modeling.

Kaplan, D.; et. al

2010-01-11T23:59:59.000Z

359

Dose coefficients and derived guidance and clinical decision levels for contaminated wounds  

Science Conference Proceedings (OSTI)

The NCRP Wound Model describing the retention of selected radionuclides at the site of a contaminated wound and their uptake into the transfer compartment has been combined with the ICRP element-specific systemic models for those radionuclides to derive dose coefficients for intakes via contaminated wounds. Those coefficients have been used to generate derived guidance levels (i.e., the activity in a wound that would result in an effective dose of 20 or 50 mSv, or in some cases, a committed organ equivalent dose of 500 mSv), and clinical decision levels (i.e., activity levels that would indicate the need for consideration of medical intervention to remove activity from the wound site or administration of decorporation therapy or both), typically set at 5 times the derived guidance levels. Data are provided for the radionuclides commonly encountered at nuclear power plants and nuclear weapons, fuel fabrication or recycling, waste disposal, medical and research facilities. These include: {sup 60}Co, {sup 90}Sr, {sup 99m}Tc, {sup 131}I, {sup 137}Cs, {sup 192}Ir, {sup 210}Po, {sup 226,228}Ra, {sup 228,232}Th, {sup 235,238}U, {sup 237}Np, {sup 238,239}Pu, {sup 241}Am, {sup 242,244}Cm, and {sup 252}Cf.

Bertelli, Luiz [Los Alamos National Laboratory; Toohey, Richard E [ORISE/ORAU; Sugarman, Steven A [ORISE/ORAU; Christensen, Doran R [ORISE/ORAU

2009-01-01T23:59:59.000Z

360

Group Analysis of Variable Coefficient Diffusion--Convection Equations. III. Conservation Laws  

E-Print Network (OSTI)

The notions of generating sets of conservation laws of systems of differential equations with respect to symmetry groups and equivalence groups are introduced and applied. This allows us to generalize essentially the procedure of finding potential symmetries for the systems with multidimensional spaces of conservation laws. A class of variable coefficient (1+1)-dimensional nonlinear diffusion-convection equations of general form $f(x)u_t=(g(x)A(u)u_x)_x+h(x)B(u)u_x$ is investigated. Using the most direct method, we carry out two classifications of local conservation laws up to equivalence relations generated by both usual and enhanced equivalence groups. Equivalence with respect to $\\hat G^{\\sim}$ and correct choice of gauge coefficients of equations play the major role for simple and clear formulation of the final results. The notion of contractions of conservation laws and one of characteristics of conservation laws are introduced and contractions of conservation laws of diffusion-convection equations are found.

N. M. Ivanova; R. O. Popovych; C. Sophocleous

2007-10-16T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

On the Fielding of a High Gain, Shock-Ignited Target on the National Ignitiion Facility in the Near Term  

SciTech Connect

Shock ignition, a new concept for igniting thermonuclear fuel, offers the possibility for a near-term ({approx}3-4 years) test of high gain inertial confinement fusion on the National Ignition Facility at less than 1MJ drive energy and without the need for new laser hardware. In shock ignition, compressed fusion fuel is separately ignited by a strong spherically converging shock and, because capsule implosion velocities are significantly lower than those required for conventional hotpot ignition, fusion energy gains of {approx}60 may be achievable on NIF at laser drive energies around {approx}0.5MJ. Because of the simple all-DT target design, its in-flight robustness, the potential need for only 1D SSD beam smoothing, minimal early time LPI preheat, and use of present (indirect drive) laser hardware, this target may be easier to field on NIF than a conventional (polar) direct drive hotspot ignition target. Like fast ignition, shock ignition has the potential for high fusion yields at low drive energy, but requires only a single laser with less demanding timing and spatial focusing requirements. Of course, conventional symmetry and stability constraints still apply. In this paper we present initial target performance simulations, delineate the critical issues and describe the immediate-term R&D program that must be performed in order to test the potential of a high gain shock ignition target on NIF in the near term.

Perkins, L J; Betti, R; Schurtz, G P; Craxton, R S; Dunne, A M; LaFortune, K N; Schmitt, A J; McKenty, P W; Bailey, D S; Lambert, M A; Ribeyre, X; Theobald, W R; Strozzi, D J; Harding, D R; Casner, A; Atzemi, S; Erbert, G V; Andersen, K S; Murakami, M; Comley, A J; Cook, R C; Stephens, R B

2010-04-12T23:59:59.000Z

362

Standard Deviation of the Copolar Correlation Coefficient for Simultaneous Transmission and Reception of Vertical and Horizontal Polarized Weather Radar Signals  

Science Conference Proceedings (OSTI)

The perturbation method is used to derive the variance of the zero-lag copolar correlation coefficient, ?|??HV?|?, for a radar simultaneously transmitting and receiving both horizontal and vertical polarization. The variance of ?|??HV?|? is a ...

Enrico Torlaschi; Yves Gingras

2003-05-01T23:59:59.000Z

363

Turbulent Transfer Coefficients and Calculation of Air Temperature inside Tall Grass Canopies in LandAtmosphere Schemes for Environmental Modeling  

Science Conference Proceedings (OSTI)

A method for estimating profiles of turbulent transfer coefficients inside a vegetation canopy and their use in calculating the air temperature inside tall grass canopies in land surface schemes for environmental modeling is presented. The ...

D. T. Mihailovic; K. Alapaty; B. Lalic; I. Arsenic; B. Rajkovic; S. Malinovic

2004-10-01T23:59:59.000Z

364

Determination of the Psychrometer Coefficient A of the WMO Reference Psychrometer by Comparison with a Standard Gravimetric Hygrometer  

Science Conference Proceedings (OSTI)

An accurate determination has been made of the psychrometer coefficient A of the reference psychrometer defined in a specification adopted by the World Meteorological Organization (WMO) in 1977. A psychrometer constructed in accordance with the ...

Jinpeng Fan

1987-03-01T23:59:59.000Z

365

The Sensitivity of the Palmer Drought Severity Index and Palmer's Z-Index to their Calibration Coefficients Including Potential Evapotranspiration  

Science Conference Proceedings (OSTI)

The Palmer Drought Severity Index (PDSI) is routinely made available by NOAA for operational use, and it has also been calculated across the United States on a historical basis back to 1895 (Karl et al., 1983). Traditionally, the coefficients ...

Thomas R. Karl

1986-01-01T23:59:59.000Z

366

A Mechanism for the Increase of Wind Stress (Drag) Coefficient with Wind Speed over Water Surfaces: A Parametric Model  

Science Conference Proceedings (OSTI)

A mechanism is proposed for a physical explanation of the increase in wind stress (drag) coefficient with wind speed over water surfaces. The formula explicitly incorporates the contribution of both winds and waves through the parameterizations ...

S. A. Hsu

1986-01-01T23:59:59.000Z

367

Sensitivity of Tropical Cyclones to Surface Exchange Coefficients and a Revised Steady-State Model incorporating Eye Dynamics  

Science Conference Proceedings (OSTI)

Numerical and theoretical models of tropical cyclones indicate that the maximum wind speed in mature storms is sensitive to the ratio of the enthalpy and momentum surface exchange coefficients and that the spinup time of tropical cyclones varies ...

Kerry A. Emanuel

1995-11-01T23:59:59.000Z

368

A Parameterization of the Visible Extinction Coefficient of Ice Clouds in Terms of the Ice/Water Content  

Science Conference Proceedings (OSTI)

This article describes a parameterization of the visible extinction coefficient of cirrus and frontal ice cloud in terms of the ice/water content. The parameterization is based on the discovery that the ice cloud particle size spectra from a ...

C. Martin R. Platt

1997-08-01T23:59:59.000Z

369

Relationship between the Scavenging Coefficient for Pollutants in Precipitation and the Radar Reflectivity Factor. Part II: Applications  

Science Conference Proceedings (OSTI)

The power-law dependences between the scavenging coefficient ? for pollutants in precipitation and the radar reflectivity factor Z, theoretically derived in Part I, are discussed here from the point of view of applications. Possible problems in ...

Kirsti Jylh

1999-10-01T23:59:59.000Z

370

Effects of Surface Exchange Coefficients and Turbulence Length Scales on the Intensity and Structure of Numerically Simulated Hurricanes  

Science Conference Proceedings (OSTI)

Using numerical simulations, this study examines the sensitivity of hurricane intensity and structure to changes in the surface exchange coefficients and to changes in the length scales of a turbulence parameterization. Compared to other recent ...

George H. Bryan

2012-04-01T23:59:59.000Z

371

A Refined Method of Parameterizing Absorption Coefficients among Multiple Gases Simultaneously from Line-by-Line Data  

Science Conference Proceedings (OSTI)

An extension of the correlated-k distribution method that uses spectral-mapping techniques was derived to parameterize line-by-line absorption coefficients for multiple gases simultaneously for use in three-dimensional atmospheric models. In a ...

Mark Z. Jacobson

2005-02-01T23:59:59.000Z

372

Impact of Breaking Wave Form Drag on Near-Surface Turbulence and Drag Coefficient over Young Seas at High Winds  

Science Conference Proceedings (OSTI)

The effects of breaking waves on near-surface wind turbulence and drag coefficient are investigated using large-eddy simulation. The impact of intermittent and transient wave breaking events (over a range of scales) is modeled as localized form ...

Nobuhiro Suzuki; Tetsu Hara; Peter P. Sullivan

2013-02-01T23:59:59.000Z

373

The Use of Electricity in Industry and Energy Saving - The Gamma Co-Efficient  

E-Print Network (OSTI)

Use of electricity in manufacturing processes is not only limited to its specific utilizations as motion power, lighting, electrolysis. Worldwide energy troubles involve in France a great voluntee to substitute in industrial processes the nuclear electricity to the oil-burning one. The main part of these uses the replacement thermal ones. Of course, electrical processes which will develop are technically tested and economically justified. Energetic comparison of concurrent processes leads to the use of simple factors : the gamma factor. It is, when using energy, the number of thermies which are replaced by one kWh. Gamma is not a factor for measuring the oil saving but the using efficiency. For measuring the oil saving, the author uses 'the net gain of oil weight'. Examples of applications and main results are given in various industrial branches.

Wolf, R.; Froehlich, R.

1983-01-01T23:59:59.000Z

374

Transfer coefficients for the Gibbs surface in a two-phase mixture in the non-equilibrium square gradient model  

E-Print Network (OSTI)

In this paper we calculate the transfer coefficients for evaporation and condensation of mixtures. We use the continuous profiles of various thermodynamic quantities through the interface, obtained in our previous works using the square gradient model. Furthermore we introduce the Gibbs surface and obtain the excess entropy production for a surface. Following the traditional non-equilibrium thermodynamic approach we introduce the surface transfer coefficients which we are able to determine from the continuous solution. The knowledge of these coefficients is important for many industrial applications which involve transport through a surface, such as for instance distillation. In our approach the values of the local resistivities in the liquid and the vapor phases are chosen on the basis of experimental values. In the interfacial region there are small peaks in these resistivities. Three amplitudes control the magnitude of these peaks. Possible values of these amplitudes are found by matching the diagonal transfer coefficients to values predicted by kinetic theory. Using these amplitudes we find that the value of the cross resistivities is 1-2 orders of magnitude higher then the one from kinetic theory. The results of both kinetic theory and molecular dynamics simulations support the existence of small peaks in the local resistivities in the interfacial region. The square gradient approach gives an independent way to determine the transfer coefficients for surfaces. The results indicate that kinetic theory underestimates the interfacial transfer coefficients in real fluids.

K. S. Glavatskiy; D. Bedeaux

2009-07-11T23:59:59.000Z

375

Diffraction coefficients of a semi-infinite planar crack embedded in a transversely-isotropic space  

E-Print Network (OSTI)

We have considered a semi-infinite crack embedded in a transversely isotropic medium and studied two special cases, one, in which the axis of symmetry is normal to the crack face and the wave incidence is arbitrary and another, in which the axis lies in the crack plane normal to the edge and the incident wave vector is also normal to the edge. The problem is of interest in Non-Destructive Evaluation, because austenitic steels that are found in claddings and other welds in the nuclear reactors are often modeled as transversely isotropic. In both of cases, we have expressed the scattered field in a closed form and computed the corresponding diffraction coefficients.

A. Gautesen; V. Zernov; L. Fradkin

2008-02-04T23:59:59.000Z

376

A comparison of theoretical and experimental rotordynamic coefficients for helically grooved annular gas seals  

E-Print Network (OSTI)

Experimental results for the rotordynamic coefficients and leakage characteristics of helically grooved annular gas seals are presented. The effects of speed, inlet pressure, pressure ratio, clearance, fluid pre-rotation, and groove angle are investigated. The experimental results are then compared to a theoretical code which attempts to predict the rotordynamic and leakage characteristics of a compressible helically grooved cylindrical seal. The experimental results confirmed two important characteristics concerning helically grooved seals. Results showed that there is excellent stability at a range of inlet pressures, speeds, clearances, and groove angles. The results show decreasing stability with increasing groove angle at low speeds and less sensitivity to groove angle at high speeds. The results also showed reduced leakages and relatively insensitive to groove angle. In general, the theoretical code could not predict the experimental results, especially in terms of the magnitude of the results. However, there was some correct theoretical prediction of trends versus groove angle.

Gansle, Anthony Joseph

1993-01-01T23:59:59.000Z

377

Towards next-to-leading order transport coefficients from the four-particle irreducible effective action  

SciTech Connect

Transport coefficients can be obtained from two-point correlators using the Kubo formulas. It has been shown that the full leading order result for electrical conductivity and (QCD) shear viscosity is contained in the resummed two-point function that is obtained from the three-loop three-particle irreducible resummed effective action. The theory produces all leading order contributions without the necessity for power counting, and in this sense it provides a natural framework for the calculation. In this article we study the four-loop four-particle irreducible effective action for a scalar theory with cubic and quartic interactions, with a nonvanishing field expectation value. We obtain a set of integral equations that determine the resummed two-point vertex function. A next-to-leading order contribution to the viscosity could be obtained from this set of coupled equations.

Carrington, M. E.; Kovalchuk, E. [Department of Physics, Brandon University, Brandon, Manitoba, R7A 6A9 (Canada) and Winnipeg Institute for Theoretical Physics, Winnipeg, Manitoba (Canada)

2010-03-15T23:59:59.000Z

378

Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3)_f$  

E-Print Network (OSTI)

We calculate the shear $\\eta(T)$ and bulk viscosities $\\zeta(T)$ as well as the electric conductivity $\\sigma_e(T)$ and heat conductivity $\\kappa(T)$ within the Nambu-Jona-Lasinio model for 3 flavors as a function of temperature as well as the entropy density $s(T)$, pressure $P(T)$ and speed of sound squared $c_s^2(T)$. We compare the results with other models such as the Polyakov-Nambu-Jona-Lasinio (PNJL) model and the dynamical quasiparticle model (DQPM) and confront these results with lattice QCD data whenever available. We find the NJL model to have a limited predictive power for the thermodynamic variables and various transport coefficients above the critical temperature whereas the PNJL model and DQPM show acceptable results for the quantities of interest.

Rudy Marty; Elena Bratkovskaya; Wolfgang Cassing; Jrg Aichelin; Hamza Berrehrah

2013-11-13T23:59:59.000Z

379

Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3)_f$  

E-Print Network (OSTI)

We calculate the shear $\\eta(T)$ and bulk viscosities $\\zeta(T)$ as well as the electric conductivity $\\sigma_e(T)$ and heat conductivity $\\kappa(T)$ within the Nambu-Jona-Lasinio model for 3 flavors as a function of temperature as well as the entropy density $s(T)$, pressure $P(T)$ and speed of sound $c_s^2(T)$. We compare the results with other models such as the Polyakov-Nambu-Jona-Lasinio (PNJL) model and the dynamical quasiparticle model (DQPM) and confront these results with lattice QCD data whenever available. We find the NJL model to have a limited predictive power for the thermodynamic variables and various transport coefficients above the critical temperature whereas the PNJL model and DQPM show acceptable results for the quantities of interest.

Rudy Marty; Elena Bratkovskaya; Wolfgang Cassing; Jrg Aichelin; Hamza Berrehrah

2013-05-30T23:59:59.000Z

380

Four-Button BPM Coefficients in Cylindrical and Elliptic Beam Chambers  

E-Print Network (OSTI)

Beam position monitor (BPM) coefficients are calculated from induced charges on four-button BPMs in circular and elliptic beam chambers for ?>> 1. Since the beam chamber cross-section for the APS storage ring is different from an exact elliptic geometry, numerical values of the BPM coefficients and their inversions are computed from two-dimensional electrostatic field distributions inside an exact geometry of the beam chamber. Utilizing Greens reciprocation theorem, a potential value is applied to the buttons rather than changing the beam position, and potential distributions corresponding to the beam positions are then computed. 1. Cylindrical Chamber A charged particle beam of short bunches induces charges on the beam chamber wall. Due to the Lorentz contraction, for ?>> 1, where ? is the relativistic factor, these charges have the same longitudinal intensity modulation as the beam. The electromagnetic fields associated with the beam are obtained by the Lorentz transformation from the fixed lab frame F to a moving reference frame F', where the charged beam is at rest [1, 2]. The field distribution inside the beam chamber becomes an electrostatic problem in the moving reference frame. Here we assume that the buttons are installed flush with the inner surface of the beam chamber, with the chamber having constant crosssection and the chamber wall at a uniform potential. For the charge density of a filament beam located at (xo,yo) in the transverse plane of the Cartesian coordinates and moving with a wave number k in the longitudinal direction z in the lab frame F, ? = ? ( x, y) cos k( z ? vt); (1) k

S. H. Kim

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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

Great Plains ASPEN Model Development: binary interaction parameters and activity coefficient parameters. Final report  

Science Conference Proceedings (OSTI)

The simulation of the various sections of the Great Plains Coal Gasification Plant involves modelling vapor-liquid equilibria and liquid-liquid equilibria that are highly nonideal. The Peng-Robinson equation of state, modified for water, was used in the simulation of most of the process sections. Interaction parameters established by regression of literature data, using ASPEN's DRS system, along with interaction parameter values found in the literature, became the database for the simulation. In two of the sections, the Oxygen Plant and the TEG drying of the product SNG, activity coefficient models were used because they gave a better prediction of the phase equilibrium. For the Rectisol unit, which removes hydrogen sulfide from the gas, parameters available from a DOE sponsored contract, Tristate, were used, after verification, for the ASPEN modified version of the RKS. The phases that were predicted using these parameters were checked against literature data and, in most cases, the liquid mole fractions of carbon dioxide predicted by the correlation were within 10% of those reported. A model that would predict phase equilibrium, based on the ionization of Lewis acids and bases and salts, would have been an ideal choice for simulation of the Stretford and Phosam flowsheets. However, only limited temperature dependent liquid activity coefficients data are available in the literature for the ionic species found in the Stretford and Phosam solutions, from which correlation parameters could be obtained by regression. Also, only the flash model can handle this type of calculation; therefore, it was used only to a limited extent in the simulation of the Stretford Unit Absorber. 118 references.

Stern, S.S.; Millman, M.C.; Kirman, J.J.; Nwogu, D.

1984-12-01T23:59:59.000Z

382

Towards the reanalysis of void coefficients measurements at proteus for high conversion light water reactor lattices  

Science Conference Proceedings (OSTI)

High Conversion Light Water Reactors (HCLWR) allows a better usage of fuel resources thanks to a higher breeding ratio than standard LWR. Their uses together with the current fleet of LWR constitute a fuel cycle thoroughly studied in Japan and the US today. However, one of the issues related to HCLWR is their void reactivity coefficient (VRC), which can be positive. Accurate predictions of void reactivity coefficient in HCLWR conditions and their comparisons with representative experiments are therefore required. In this paper an inter comparison of modern codes and cross-section libraries is performed for a former Benchmark on Void Reactivity Effect in PWRs conducted by the OECD/NEA. It shows an overview of the k-inf values and their associated VRC obtained for infinite lattice calculations with UO{sub 2} and highly enriched MOX fuel cells. The codes MCNPX2.5, TRIPOLI4.4 and CASMO-5 in conjunction with the libraries ENDF/B-VI.8, -VII.0, JEF-2.2 and JEFF-3.1 are used. A non-negligible spread of results for voided conditions is found for the high content MOX fuel. The spread of eigenvalues for the moderated and voided UO{sub 2} fuel are about 200 pcm and 700 pcm, respectively. The standard deviation for the VRCs for the UO{sub 2} fuel is about 0.7% while the one for the MOX fuel is about 13%. This work shows that an appropriate treatment of the unresolved resonance energy range is an important issue for the accurate determination of the void reactivity effect for HCLWR. A comparison to experimental results is needed to resolve the presented discrepancies. (authors)

Hursin, M.; Koeberl, O.; Perret, G. [Paul Scherrer Institut PSI, 5232 Villigen (Switzerland)

2012-07-01T23:59:59.000Z

383

Molecular and Thermal Diffusion Coefficients of Alkane-Alkane and Alkane-Aromatic Binary Mixtures: Effect of Shape and Size of Molecules  

E-Print Network (OSTI)

Molecular and Thermal Diffusion Coefficients of Alkane-Alkane and Alkane-Aromatic Binary Mixtures Form: October 27, 2006 New molecular and thermal diffusion coefficients of binary mixtures of normal measured in a thermogravitational column. Molecular diffusion coefficients were measured using an open

Firoozabadi, Abbas

384

Fidelity criterion for quantum-domain transmission and storage of coherent states beyond unit-gain constraint  

E-Print Network (OSTI)

We generalize the experimental success criterion for quantum teleportation/memory in continuous-variable quantum systems to be suitable for non-unit-gain condition by considering attenuation/amplification of the coherent-state amplitude. The new criterion can be used for a non-ideal quantum memory and long distance quantum communication as well as quantum devices with amplification process. It is also shown that the framework to measure the average fidelity is capable of detecting all Gaussian channels in quantum domain.

Ryo Namiki; Masato Koashi; Nobuyuki Imoto

2007-03-17T23:59:59.000Z

385

Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign  

SciTech Connect

This report documents the history of attempts to directly measure cloud extinction, the current measurement device known as the Cloud Extinction Probe (CEP), specific problems with direct measurement of extinction coefficient, and the attempts made here to address these problems. Extinction coefficient is one of the fundamental microphysical parameters characterizing bulk properties of clouds. Knowledge of extinction coefficient is of crucial importance for radiative transfer calculations in weather prediction and climate models given that Earth's radiation budget (ERB) is modulated much by clouds. In order for a large-scale model to properly account for ERB and perturbations to it, it must ultimately be able to simulate cloud extinction coefficient well. In turn this requires adequate and simultaneous simulation of profiles of cloud water content and particle habit and size. Similarly, remote inference of cloud properties requires assumptions to be made about cloud phase and associated single-scattering properties, of which extinction coefficient is crucial. Hence, extinction coefficient plays an important role in both application and validation of methods for remote inference of cloud properties from data obtained from both satellite and surface sensors (e.g., Barker et al. 2008). While estimation of extinction coefficient within large-scale models is relatively straightforward for pure water droplets, thanks to Mie theory, mixed-phase and ice clouds still present problems. This is because of the myriad forms and sizes that crystals can achieve, each having their own unique extinction properties. For the foreseeable future, large-scale models will have to be content with diagnostic parametrization of crystal size and type. However, before they are able to provide satisfactory values needed for calculation of radiative transfer, they require the intermediate step of assigning single-scattering properties to particles. The most basic of these is extinction coefficient, yet it is rarely measured directly, and therefore verification of parametrizations is difficult. The obvious solution is to be able to measure microphysical properties and extinction at the same time and for the same volume. This is best done by in situ sampling by instruments mounted on either balloon or aircraft. The latter is the usual route and the one employed here. Yet the problem of actually measuring extinction coefficient directly for arbitrarily complicated particles still remains unsolved.

Korolev, A; Shashkov, A; Barker, H

2012-03-06T23:59:59.000Z

386

Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign  

SciTech Connect

This report documents the history of attempts to directly measure cloud extinction, the current measurement device known as the Cloud Extinction Probe (CEP), specific problems with direct measurement of extinction coefficient, and the attempts made here to address these problems. Extinction coefficient is one of the fundamental microphysical parameters characterizing bulk properties of clouds. Knowledge of extinction coefficient is of crucial importance for radiative transfer calculations in weather prediction and climate models given that Earth's radiation budget (ERB) is modulated much by clouds. In order for a large-scale model to properly account for ERB and perturbations to it, it must ultimately be able to simulate cloud extinction coefficient well. In turn this requires adequate and simultaneous simulation of profiles of cloud water content and particle habit and size. Similarly, remote inference of cloud properties requires assumptions to be made about cloud phase and associated single-scattering properties, of which extinction coefficient is crucial. Hence, extinction coefficient plays an important role in both application and validation of methods for remote inference of cloud properties from data obtained from both satellite and surface sensors (e.g., Barker et al. 2008). While estimation of extinction coefficient within large-scale models is relatively straightforward for pure water droplets, thanks to Mie theory, mixed-phase and ice clouds still present problems. This is because of the myriad forms and sizes that crystals can achieve, each having their own unique extinction properties. For the foreseeable future, large-scale models will have to be content with diagnostic parametrization of crystal size and type. However, before they are able to provide satisfactory values needed for calculation of radiative transfer, they require the intermediate step of assigning single-scattering properties to particles. The most basic of these is extinction coefficient, yet it is rarely measured directly, and therefore verification of parametrizations is difficult. The obvious solution is to be able to measure microphysical properties and extinction at the same time and for the same volume. This is best done by in situ sampling by instruments mounted on either balloon or aircraft. The latter is the usual route and the one employed here. Yet the problem of actually measuring extinction coefficient directly for arbitrarily complicated particles still remains unsolved.

Korolev, A; Shashkov, A; Barker, H

2012-03-06T23:59:59.000Z

387

Interpretation of Self-Potential Anomalies Using Constitutive Relationships for Electrochemical and Thermoelectric Coupling Coefficients  

DOE Green Energy (OSTI)

Constitutive relationships for electrochemical and thermoelectric cross-coupling coefficients are derived using ionic mobilities, applying a general derivative of chemical potential and employing the zero net current condition. The general derivative of chemical potential permits thermal variations which give rise to the thermoelectric effect. It also accounts for nonideal solution behavior. An equation describing electric field strength is similarly derived with the additional assumption of electrical neutrality in the fluid Planck approximation. The Planck approximation implies that self-potential (SP) is caused only by local sources and also that the electric field strength has only first order spatial variations. The derived relationships are applied to the NaCl-KCl concentration cell with predicted and measured voltages agreeing within 0.4 mV. The relationships are also applied to the Long Valley and Yellowstone geothermal systems. There is a high degree of correlation between predicted and measured SP response for both systems, giving supporting evidence for the validity of the approach. Predicted SP amplitude exceeds measured in both cases; this is a possible consequence of the Planck approximation. Electrochemical sources account for more than 90% of the predicted response in both cases while thermoelectric mechanisms account for the remaining 10%; electrokinetic effects are not considered. Predicted electrochemical and thermoelectric voltage coupling coefficients are comparable to values measured in the laboratory. The derived relationships are also applied to arbitrary distributions of temperature and fluid composition to investigate the geometric diversity of observed SP anomalies. Amplitudes predicted for hypothetical saline spring and hot spring environments are less than 40 mV. In contrast, hypothetical near surface steam zones generate very large amplitudes, over 2 V in one case. These results should be viewed with some caution due to the uncertain validity of the Planck approximation for these conditions. All amplitudes are controlled by electrochemical mechanisms. Polarities are controlled by the curvature of the concentration or thermal profile. Concave upward thermal profiles produce positive anomalies, for constant fluid concentrations, whereas concave upward concentration profiles produce negative anomalies. Concave downward concentration profiles are characterized by small negative closures bounding a larger, positive SP anomaly.

Knapp, R. B.; Kasameyer, P. W.

1988-01-01T23:59:59.000Z

388

DETERMINATION OF THE COEFFICIENT OF LINEAR THERMAL EXPANSION OF METALS AT T C  

SciTech Connect

A dial gage dilatometer was used to determine the thermal expansion of 18/8/l and 18/13/1 stainless steels and of cast uranium. The measurements were made under a vacuum of 2 x 10/sup -3/ mm Hg. Both types of steel showed linear expansion over the temperature range 20 to 900 deg C, the coefficients of expansion obtained being 1.88 plus or minus 0.03 x 10/sup -5/ and 1.87 plus or minus 0.03 x 10/sup -5 deg /C/sup -1/, respectively. Values of 1.64 to 1.70 plus or minus 0.05, 2.20 plus or minus 0.05. and 1.70 plus or minus 0.05 x 10/sup -5 deg /C/sup -1/ were obtained for the coefficients of expansion of cast uranium in the alpha , BETA , and gamma forms. The alpha BETA and BETA - - gamma transformations gave rise a changes in length of 0.7 and 0.4%. (auth) l6223 The conditions in a die during hot pressing are considered in delail and from this consideration the propenties of an ideal die material are specified. Possible die materials for hot pressing uranium are discussed and compared with this ideal specification. Experimental work on cemented carbides compatible with uranium is recommended. (auth) l6224 Stresses likely to arise in the fuel elements of the fast fission reactor due to its design and operation have been calculated using simple elastic theory. The effects of some of these stresses are briefly considered, and recommendations are made as to ways in which some of the more dangerous stresses may be eliminated or reduced. (auth) l6225 The principles of arc melting and casting are described and various types of furnace compared. On the basis of experiments with a small laboratory furnace a large ingot casting furnace has been designed. It has been shown that when using an argon atmosphere there are no fundamental difficulties to be overcome. With a non-consumable upper electrode it has not yet heen possible to maintain a stable arc below 0.2 mm pressure, and it is recommended that the ingot casting furnace should be operated in an argon atmosphere until this problem hss been solved. (auth)

Makin, S.M.; Hunter, P.

1953-03-01T23:59:59.000Z

389

Measurement and modeling of infrared nonlinear absorption coefficients and laser-induced damage thresholds in Ge and GaSb  

SciTech Connect

Using a simultaneous fitting technique to extract nonlinear absorption coefficients from data at two pulse widths, we measure two-photon and free-carrier absorption coefficients for Ge and GaSb at 2.05 and 2.5 {mu}m for the first time, to our knowledge. Results agreed well with published theory. Single-shot damage thresholds were also measured at 2.5 {mu}m and agreed well with modeled thresholds using experimentally determined parameters including nonlinear absorption coefficients and temperature dependent linear absorption. The damage threshold for a single-layer Al{sub 2}O{sub 3} anti-reflective coating on Ge was 55% or 35% lower than the uncoated threshold for picosecond or nanosecond pulses, respectively.

Wagner, T. J.; Bohn, M. J.; Coutu, R. A. Jr. [Air Force Institute of Technology, Wright Patterson Air Force Base, Ohio 45433 (United States); Gonzalez, L. P.; Murray, J. M.; Guha, S. [Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States); Schepler, K. L. [Air Force Research Laboratory, Sensors Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States)

2010-10-15T23:59:59.000Z

390

Measurement of the electrostrictive coefficients of modified lead magnesium niobate using neutron powder diffraction  

Science Conference Proceedings (OSTI)

Neutron powder diffraction measurements and a constitutive model were used to determine the bulk longitudinal and transverse electrostrictive coefficients (Q{sub ijkl}) for polycrystalline samples of the subject material. Effective single-crystal Q{sub ijkl} were calculated from the powder neutron diffraction data. The resulting values of the three independent Q{sub ijkl}, as determined from the cubic symmetry of the underlying lattice, are Q{sub 3333}=2.1{times}10{sup {minus}2}m{sup 4}/C{sup 2}, Q{sub 3322}={minus}0.87{times}10{sup {minus}2}m{sup 4}/C{sup 2}, and Q{sub 3232}=1.2{times}10{sup {minus}2}m{sup 4}/C{sup 2}. Using these effective single-crystal values, a random ensemble average was used to predict the electromechanical performance of the polycrystalline material. Predicted values of bulk Q{sub 3333}=1.86{times}10{sup {minus}2}m{sup 4}/C{sup 2} and Q{sub 3322}={minus}0.78{times}10{sup {minus}2}m{sup 4}/C{sup 2} are 89{percent} and 87{percent}, respectively, of the effective single-crystal values for Q{sub 3333} and Q{sub 3322}, while measured values of polycrystalline specimens are only {approximately}70{percent} of the single-crystal values. {copyright} {ital 1998 American Institute of Physics.}

Misture, S.T.; Pilgrim, S.M. [New York State College of Ceramics at Alfred University, Alfred, New York 14802 (United States); Hicks, J.C.; Blue, C.T. [Materials, Sensors, and Systems Branch, Code D364, NCCOSC/RDTE Division, San Diego, California 92152-6147 (United States); Payzant, E.A.; Hubbard, C.R. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

1998-03-01T23:59:59.000Z

391

Strontium Distribution Coefficients of Basalt Core Samples from the Idaho National Engineering and Environmental Laboratory, Idaho  

Science Conference Proceedings (OSTI)

Strontium distribution coefficients (Kd's) were measured for 24 basalt core samples collected from selected sites at the Idaho National Engineering and Environmental Laboratory (INEEL). The measurements were made to help assess the variability of strontium Kd's as part of an ongoing investigation of strontium transport properties through geologic materials at the INEEL. The investigation is being conducted by the U.S. Geological Survey and Idaho State University in cooperation with the U.S. Department of Energy. Batch experiments were used to measure Kd's of basalt core samples using an aqueous solution representative of wastewater in waste-disposal ponds at the INEEL. Calculated strontium Kd's of the 24 basalt core samples ranged from 3.6{+-}1.3 to 29.4{+-}1.6 milliliters per gram. These results indicate a narrow range of variability in the strontium sorptive capacities of basalt relative to those of the sedimentary materials at the INEEL. The narrow range of the basalt Kd's can be attributed to physical and chemical properties of the basalt, and to compositional changes in the equilibrated solutions after being mixed with the basalt. The small Kd's indicate that basalt is not a major contributor in preventing the movement of strontium-90 in solution.

J. J. Colello (USGS); J. J. Rosentreter (ISU); R. C. Bartholomay (USGS); M. J. Liszewski (USGS)

1998-12-01T23:59:59.000Z

392

Flat bundles, von Neumann algebras and $K$-theory with $\\R/\\Z$-coefficients.  

E-Print Network (OSTI)

Let $M$ be a closed manifold and $\\alpha : \\pi_1(M)\\to U_n$ a representation. We give a purely $K$-theoretic description of the associated element $[\\alpha]$ in the $K$-theory of $M$ with $\\R/\\Z$-coefficients. To that end, it is convenient to describe the $\\R/\\Z$-$K$-theory as a relative $K$-theory with respect to the inclusion of $\\C$ in a finite von Neumann algebra $B$. We use the following fact: there is, associated with $\\alpha$, a finite von Neumann algebra $B$ together with a flat bundle $\\cE\\to M$ with fibers $B$, such that $E_\\a\\otimes \\cE$ is canonically isomorphic with $\\C^n\\otimes \\cE$, where $E_\\alpha$ denotes the flat bundle with fiber $\\C^n$ associated with $\\alpha$. We also discuss the spectral flow and rho type description of the pairing of the class $[\\alpha]$ with the $K$-homology class of an elliptic selfadjoint (pseudo)-differential operator $D$ of order 1.

Paolo Antonini (IMJ); Sara Azzali (IMJ); Georges Skandalis (IMJ)

393

Inverse Raman spectroscopy measurements of line-shift coefficients in hydrogen perturbed by argon  

DOE Green Energy (OSTI)

High resolution Raman studies of the Q branch in H[sub 2] perturbed by Ar are relevant to combustion diagnostics and for tests of the intermolecular potential. The use of spectroscopic techniques to study combustion requires accurate models for the line shapes which can range from Lorentzian to Gaussian to more complicated profiles depending on the perturber species, perturber concentration, density and temperature. Calculations with these models require estimates of the speed dependence of the line-shift and line-broadening coefficients. Modern theories are now able to predict the shifting and broadening resulting from collisions but are hampered by uncertainties in the interaction potential. One of the most studied potentials is that of H[sub 2]-Ar which has the advantage of being theoretically tractable for line shape computations. Furthermore, since the masses of Ar and molecular O[sub 2] and N[sub 2] are similar, spectral features depending on the perturber's mass are expected to be similar. We report preliminary measurements of the density shift of the Q branch lines in H[sub 2] as a function of rotational state and temperature.

Forsman, J.W.; Farrow, R.L.; Rahn, L.A.

1993-01-01T23:59:59.000Z

394

Inverse Raman spectroscopy measurements of line-shift coefficients in hydrogen perturbed by argon  

DOE Green Energy (OSTI)

High resolution Raman studies of the Q branch in H{sub 2} perturbed by Ar are relevant to combustion diagnostics and for tests of the intermolecular potential. The use of spectroscopic techniques to study combustion requires accurate models for the line shapes which can range from Lorentzian to Gaussian to more complicated profiles depending on the perturber species, perturber concentration, density and temperature. Calculations with these models require estimates of the speed dependence of the line-shift and line-broadening coefficients. Modern theories are now able to predict the shifting and broadening resulting from collisions but are hampered by uncertainties in the interaction potential. One of the most studied potentials is that of H{sub 2}-Ar which has the advantage of being theoretically tractable for line shape computations. Furthermore, since the masses of Ar and molecular O{sub 2} and N{sub 2} are similar, spectral features depending on the perturber`s mass are expected to be similar. We report preliminary measurements of the density shift of the Q branch lines in H{sub 2} as a function of rotational state and temperature.

Forsman, J.W.; Farrow, R.L.; Rahn, L.A.

1993-12-31T23:59:59.000Z

395

Measurements of the hydrogenic recombination coefficient for the TFTR vacuum vessel  

DOE Green Energy (OSTI)

Characteristic values of the recombination rate coefficient for hydrogen and deuterium in stainless steel have been measured for the inner wall of the TFTR vacuum vessel for vessel temperatures of 25 to 100 C. In situ measurements of k/sub r/ are important for predicting the hydrogen isotope retention in the wall as a function of time, temperature, and discharge exposure, particularly because existing laboratory measurements of k/sub r/ for stainless steel span a range of four orders of magnitude. The measurement technique involved the observation of the decrease in hydrogen pressure during a glow discharge in the TFTR vacuum vessel with an initial static gas fill. The resulting values of k/sub r/ at 25 C are in the range of (0.4 to 4) x 10/sup -27/cm/sup 4/-s/sup -1/ assuming a value of the hydrogenic diffusivity of 2 x 10/sup -12/cm/sup 2/-s/sup -1/ at room temperature. No significant isotopic dependence was observed and the temperature dependence of k/sub r/ is consistent with the literature value (0.5 eV) of the activation energy. The implications of this range of values of k/sub r/, for the estimation of the in-vessel tritium inventory following D-T operation in TFTR are discussed.

Dylla, H.F.; Cecchi, J.L.; Knize, R.J.

1983-12-01T23:59:59.000Z

396

New Empirical Relationship between Thrust Coefficient and Induction Factor for the Turbulent Windmill State  

DOE Green Energy (OSTI)

Wind turbines sometimes experience the turbulent windmill state during startup or shutdown. This rarely happens during normal operation, so it has little effect on power curves or energy production. However, for completeness we need to be able to model situations where the axial induction factor exceeds 0.5. Classical momentum theory, which shows a relationship between the thrust coefficient and the axial induction factor, is not valid in this region. Glauert plotted some experimental data taken by Lock in the 1920s against this parabolic relationship and found very poor agreement for operation in this high-induction state. He proposed a new empirical relationship to fit the experimental data. Unfortunately, the new empirical curve does not account for tip or hub losses. Others have proposed multiplying the axial induction factor by the loss factor to correct the curve, but this still leaves a mathematical no-man's-land between the classical curve and the modified version of Glauert's empirical curve. The purpose of this paper is to document the derivation of a new curve that accounts for tip and hub losses and eliminates the numerical problems of the previous approaches.

Buhl, M.L., Jr.

2005-08-01T23:59:59.000Z

397

Preliminary market potential indexing study of the United States for direct gain in new single-family residential construction  

SciTech Connect

The evaluation of the market potential for passive solar designs in residential new construction offers an attractive counterpart to the numerous market penetration assessments that have been performed over the last four years. Market penetration analyses have generally concerned themselves with the long run adoption of solar energy technologies, while Market Potential Indexing (MPI) addressed here examines the near-term attractiveness of solar. The MPI method is briefly reviewed, followed by specification of six attributes that may characterize the residential single-family new construction market. Raw attribute data for each of the six is presented for 220 regions within the United States. Attribute weighting functions are constructed from the perspective of consumers, producers or home builders, and the federal government. Preliminary results from these three perspectives are portrayed for a fixed sized direct gain design.

Robson, W.M.; Roach, F.

1981-01-01T23:59:59.000Z

398

An asixymmetric diffusion experiment for the determination of diffusion and sorption coefficients of rock samples  

SciTech Connect

Diffusion anisotropy is a critical property in predicting migration of substances in sedimentary formations with very low permeability. The diffusion anisotropy of sedimentary rocks has been evaluated mainly from laboratory diffusion experiments, in which the directional diffusivities are separately estimated by through-diffusion experiments using different rock samples, or concurrently by in-diffusion experiments in which only the tracer profile in a rock block is measured. To estimate the diffusion anisotropy from a single rock sample, this study proposes an axisymmetric diffusion test, in which tracer diffuses between a cylindrical rock sample and a surrounding solution reservoir. The tracer diffusion between the sample and reservoir can be monitored from the reservoir tracer concentrations, and the tracer profile could also be obtained after dismantling the sample. Semi-analytical solutions are derived for tracer concentrations in both the reservoir and sample, accounting for an anisotropic diffusion tensor of rank two as well as the dilution effects from sampling and replacement of reservoir solution. The transient and steady-state analyses were examined experimentally and numerically for different experimental configurations, but without the need for tracer profiling. These experimental configurations are tested for in- and out-diffusion experiments using Koetoi and Wakkanai mudstones and Shirahama sandstone, and are scrutinized by a numerical approach to identify favorable conditions for parameter estimation. The analysis reveals the difficulty in estimating diffusion anisotropy; test configurations are proposed for enhanced identifiability of diffusion anisotropy. Moreover, it is demonstrated that the axisymmetric diffusion test is efficient in obtaining the sorption parameter from both steady-state and transient data, and in determining the effective diffusion coefficient if isotropic diffusion is assumed. Moreover, measuring reservoir concentrations in an axisymmetric diffusion experiment coupled with tracer profiling may be a promising approach to estimate of diffusion anisotropy of sedimentary rocks.

Takeda, M.; Hiratsuka, T.; Ito, K.; Finsterle, S.

2011-02-01T23:59:59.000Z

399

Theory of quantum frequency conversion and type-II parametric down-conversion in the high-gain regime  

E-Print Network (OSTI)

Frequency conversion (FC) and type-II parametric down-conversion (PDC) processes serve as basic building blocks for the implementation of quantum optical experiments: type-II PDC enables the efficient creation of quantum states such as photon-number states and Einstein-Podolsky-Rosen-states (EPR-states). FC gives rise to technologies enabling efficient atom-photon coupling, ultrafast pulse gates and enhanced detection schemes. However, despite their widespread deployment, their theoretical treatment remains challenging. Especially the multi-photon components in the high-gain regime as well as the explicit time-dependence of the involved Hamiltonians hamper an efficient theoretical description of these nonlinear optical processes. In this paper, we investigate these effects and put forward two models that enable a full description of FC and type-II PDC in the high-gain regime. We present a rigorous numerical model relying on the solution of coupled integro-differential equations that covers the complete dynamics of the process. As an alternative, we develop a simplified model that, at the expense of neglecting time-ordering effects, enables an analytical solution. While the simplified model approximates the correct solution with high fidelity in a broad parameter range, sufficient for many experimental situations, such as FC with low efficiency, entangled photon-pair generation and the heralding of single photons from type-II PDC, our investigations reveal that the rigorous model predicts a decreased performance for FC processes in quantum pulse gate applications and an enhanced EPR-state generation rate during type-II PDC, when EPR squeezing values above 12 dB are considered.

Andreas Christ; Benjamin Brecht; Wolfgang Mauerer; Christine Silberhorn

2012-10-31T23:59:59.000Z

400

Discrimination Analysis of Earthquakes and Man-Made Events Using ARMA Coefficients Determination by Artificial Neural Networks  

Science Conference Proceedings (OSTI)

A Quadratic Neural Networks (QNNs) model has been developed for identifying seismic source classification problem at regional distances using ARMA coefficients determination by Artificial Neural Networks (ANNs). We have devised a supervised neural system to discriminate between earthquakes and chemical explosions with filter coefficients obtained by windowed P-wave phase spectra (15 s). First, we preprocess the recording's signals to cancel out instrumental and attenuation site effects and obtain a compact representation of seismic records. Second, we use a QNNs system to obtain ARMA coefficients for feature extraction in the discrimination problem. The derived coefficients are then applied to the neural system to train and classification. In this study, we explore the possibility of using single station three-component (3C) covariance matrix traces from a priori-known explosion sites (learning) for automatically recognizing subsequent explosions from the same site. The results have shown that this feature extraction gives the best classifier for seismic signals and performs significantly better than other classification methods. The events have been tested, which include 36 chemical explosions at the Semipalatinsk test site in Kazakhstan and 61 earthquakes (mb = 5.0-6.5) recorded by the Iranian National Seismic Network (INSN). The 100% correct decisions were obtained between site explosions and some of non-site events. The above approach to event discrimination is very flexible as we can combine several 3C stations.

AllamehZadeh, Mostafa, E-mail: dibaparima@yahoo.com [International Institute of Earthquake Engineering and Seismology (Iran, Islamic Republic of)

2011-12-15T23:59:59.000Z

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401

Comparison of evolutionary computation techniques for noise injected neural network training to estimate longitudinal dispersion coefficients in rivers  

Science Conference Proceedings (OSTI)

This study presents the comparison of various evolutionary computation (EC) optimization techniques applied to train the noise-injected multi-layer perceptron neural networks used for estimation of longitudinal dispersion coefficient in rivers. The special ... Keywords: Differential Evolution, Evolution Strategy, Evolutionary Computation, Longitudinal dispersion, Neural Networks, Noise injection, Particle Swarm Optimization

Adam P. Piotrowski; Pawel M. Rowinski; Jaroslaw J. Napiorkowski

2012-01-01T23:59:59.000Z

402

NUMERICAL DETERMINATION AND TREATMENT OF CONVECTIVE HEAT TRANSFER COEFFICIENT IN THE COUPLED BUILDING ENERGY AND CFD SIMULATION  

E-Print Network (OSTI)

for the correct prediction of the convective heat. A finer grid resolution in CFD does not always lead to a more conservation equations of flow on these grid cells. As shown in Figure 1(a), CFD calculates convective heat1 NUMERICAL DETERMINATION AND TREATMENT OF CONVECTIVE HEAT TRANSFER COEFFICIENT IN THE COUPLED

Chen, Qingyan "Yan"

403

Relationship between the Scavenging Coefficient for Pollutants in Precipitation and the Radar Reflectivity Factor. Part I: Derivation  

Science Conference Proceedings (OSTI)

The relation between the scavenging coefficient ? (s?1) for air pollutants in precipitation and the radar reflectivity factor Z (mm6 m?3) is based on the fact that they are both functions of the hydrometeor size distribution. In this paper, which ...

Kirsti Jylh

1999-10-01T23:59:59.000Z

404

P-adic Elliptic Quadratic Forms, Parabolic-Type Pseudodifferential Equations With Variable Coefficients, and Markov Processes  

E-Print Network (OSTI)

In this article we study the Cauchy problem for a new class of parabolic-type pseudodifferential equations with variable coefficients for which the fundamental solutions are transition density functions of Markov processes in the four dimensional vector space over the field of p-adic numbers.

O. F. Casas-Snchez; W. A. Ziga-Galindo

2013-11-29T23:59:59.000Z

405

Globally conservative properties and error estimation of a multi-symplectic scheme for Schrdinger equations with variable coefficients  

Science Conference Proceedings (OSTI)

Based on the multi-symplecticity of the Schrodinger equations with variable coefficients, we give a multi-symplectic numerical scheme, and investigate some conservative properties and error estimation of it. We show that the scheme satisfies discrete ... Keywords: Conservation laws, Error estimation, Global energy transit, Multi-symplectic integrators, Schrdinger equations

Jialin Hong; Ying Liu; Hans Munthe-Kaas; Antonella Zanna

2006-06-01T23:59:59.000Z

406

The Size and Scattering Coefficient of Urban Aerosol Particles at Washington, DC as a Function of Relative Humidity  

Science Conference Proceedings (OSTI)

The relative humidity dependence of the size and scattering coefficient of atmospheric aerosol particles was measured at Washington, DC during the period 2631 July 1979. Particle growth curves (i.e., curves of the ratio r/r0, of particle radius ...

James W. Fitzgerald; William A. Hoppel; Michael A. Vietti

1982-08-01T23:59:59.000Z

407

Variation of Bulk-Derived Surface Flux, Stability, and Roughness Results Due to the Use of Different Transfer Coefficient Schemes  

Science Conference Proceedings (OSTI)

Ten published bulk transfer coefficient schemes are used with more than 2600 sets of shipboard observations made in the North Atlantic at Ocean Station C over a one-year period. Using the same input data, the differences in the various ...

Theodore V. Blanc

1985-06-01T23:59:59.000Z

408

Export markets gain strength  

SciTech Connect

The prices for internally traded coal in the USA have reached record levels and the future market fundamentals look very good. This is mainly due to Asian demand. The article discusses recent markets for US coal and summarizes findings of a recent study by Hill & Associates entitled 'International coal trade - supply, demand and prices to 2025'. 1 ref., 2 tabs.

Fiscor, S.

2008-02-15T23:59:59.000Z

409

Gaining Access Unique Opportunities  

E-Print Network (OSTI)

Reactor (HFIR) User Facilities High Temperature Materials Laboratory (HTML) Holifield Radioactive Ion Beam such as physics, chemistry, materials science, engineering, and biology. HFIR also provides capabilities

Oak Ridge National Laboratory

410

Radial wave thermoacoustic engines: Theory and examples for refrigerators and high?gain narrow?bandwidth photoacoustic spectrometers  

Science Conference Proceedings (OSTI)

A theoretical analysis of radial wave thermoacoustic engines in cylindrical resonators is developed. Impedance and pressure translation equations are presented for open sections of the resonator and for heat exchangers. Coupled first?order differential equations are given for pressure and impedance in the temperature gradient supporting engine section (stack). These quantities are used to calculate heat and work flows and to predict engine performance. Theory and design of a variable quality factor resonator for enhanced photoacoustic spectroscopy are presented. The short stack approximation is developed for the radial geometry and is used along with plane?wave equations to compare refrigerator performance for these two geometries. Results of the comparison are that engines in the plane?wave geometry are better overall refrigerators when maximizing the coefficient of performance and cooling capacity together.

W. Patrick Arnott; Richard Raspet; Hans Moosmller

1996-01-01T23:59:59.000Z

411

ON THE VARIATION OF ZONAL GRAVITY COEFFICIENTS OF A GIANT PLANET CAUSED BY ITS DEEP ZONAL FLOWS  

SciTech Connect

Rapidly rotating giant planets are usually marked by the existence of strong zonal flows at the cloud level. If the zonal flow is sufficiently deep and strong, it can produce hydrostatic-related gravitational anomalies through distortion of the planet's shape. This paper determines the zonal gravity coefficients, J{sub 2n}, n = 1, 2, 3, ..., via an analytical method taking into account rotation-induced shape changes by assuming that a planet has an effective uniform density and that the zonal flows arise from deep convection and extend along cylinders parallel to the rotation axis. Two different but related hydrostatic models are considered. When a giant planet is in rigid-body rotation, the exact solution of the problem using oblate spheroidal coordinates is derived, allowing us to compute the value of its zonal gravity coefficients J-bar{sub 2n}, n=1,2,3,..., without making any approximation. When the deep zonal flow is sufficiently strong, we develop a general perturbation theory for estimating the variation of the zonal gravity coefficients, {Delta}J{sub 2n}=J{sub 2n}-J-bar{sub 2n}, n=1,2,3,..., caused by the effect of the deep zonal flows for an arbitrarily rapidly rotating planet. Applying the general theory to Jupiter, we find that the deep zonal flow could contribute up to 0.3% of the J{sub 2} coefficient and 0.7% of J{sub 4}. It is also found that the shape-driven harmonics at the 10th zonal gravity coefficient become dominant, i.e., {Delta}J{sub 2n}>=J-bar{sub 2n} for n {>=} 5.

Kong Dali; Zhang Keke [Center for Geophysical and Astrophysical Fluid Dynamics and Department of Mathematical Sciences, University of Exeter, EX4 4QF (United Kingdom); Schubert, Gerald, E-mail: dk254@ex.ac.uk, E-mail: kzhang@ex.ac.uk, E-mail: schubert@ucla.edu [Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567 (United States)

2012-04-01T23:59:59.000Z

412

Effects of hydrodynamic coefficients on the global motion characteristics of spar structures  

E-Print Network (OSTI)

A number of studies have already discussed the influence of various nonlinear effects on the response of a spar and the variation of the results with different approaches. In this work, the effects of the values of the inertia and drag coefficients used in Morison's equation on the response of a spar are studied in order to assess the sensitivity of the results to the assumed values of C[] and C[]. Two different programs, NDASPAR and SPARTCOM, developed independently at the Offshore Technology Research Center (OTRC), have been used for the study of the dynamic response due to excitation by two bichromatic waves, denoted as BC5 and BC8. Comparisons have been made between the experimental results obtained at the wave basin of the OTRC, results published originally by the respective authors of the two programs and the results obtained in this work. The quantities selected for comparison were mean offsets and maximum and minimum responses from the computed time histories of the surge and pitch motions, as well as the peaks of the frequency amplitude spectra (FAS) of these motions, representing the frequency content of the motions and allowing us to distinguish between linear and nonlinear components. The studies show that both programs give results which are in reasonable agreement with the experimental data as far as maximum (and minimum) response values are concerned and also show some significant differences in their frequency content and the amplitudes of the nonlinear peaks in the FAS of the motions. It was found that SPARTCOM reproduces the mean offset values much better, whereas the available version of NDASPAR does not account for mean drift effects. The study also shows that the value of the C[] primarily affects the amplitudes of the peaks at the natural frequencies while C[] affects the amplitude of the peak at the difference-frequency, as well as the natural frequencies. The two programs assume that changing the value of C[] also changes the added mass and therefore results in a change in the natural frequencies.

Sarkar, Indranil

2001-01-01T23:59:59.000Z

413

Page not found | Department of Energy  

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

61 - 10270 of 31,917 results. 61 - 10270 of 31,917 results. Download CX-003570: Categorical Exclusion Determination R10 Heat Mirror Technology with Optimized Solar Heat Gain Coefficient CX(s) Applied: B3.6 Date: 08/24/2010 Location(s): Palo Alto, California Office(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory http://energy.gov/nepa/downloads/cx-003570-categorical-exclusion-determination Download CX-002987: Categorical Exclusion Determination Activities in 135 Hydrogen Research Technology Laboratory CX(s) Applied: B3.6 Date: 06/22/2010 Location(s): Aiken, South Carolina Office(s): Environmental Management, Savannah River Operations Office http://energy.gov/nepa/downloads/cx-002987-categorical-exclusion-determination Download CX-000494: Categorical Exclusion Determination

414

Thermodynamics of electrolyte mixtures. Activity and osmotic coefficients consistent with the higher-order limiting law for symmetrical mixing  

SciTech Connect

The parameters for symmetrical mixing of ions of the same sign in the virial-coefficient (Pitzer) system are evaluated from literature data for 25/sup 0/C in a manner consistent with the higher-order limiting law of Friedman. Twenty-four systems involve cation mixing with a common anion and fourteen involve anion mixing with a common cation. Heat of mixing data were similarly treated in a recent publication; the results give the temperature coefficients of some of these same parameters. The combined results yield the mixing parameters as functions of temperature on a basis both self-consistent and in accord with the limiting law. The results also yield, for a few systems without a common ion, predicted values in good agreement with experimental data.

Yang, J.; Pitzer, K.S.

1988-10-01T23:59:59.000Z

415

Layered ultra-thin coherent structures used as electrical resistors having low-temperature coefficient of resistivity  

DOE Patents (OSTI)

A thin film resistor having a controlled temperature coefficient of resistance (TCR) ranging from negative to positive degrees kelvin and having relatively high resistivity. The resistor is a multilayer superlattice crystal containing a plurality of alternating, ultra-thin layers of two different metals. TCR is varied by controlling the thickness of the individual layers. The resistor can be readily prepared by methods compatible with thin film circuitry manufacturing techniques.

Werner, T.R.; Falco, C.M.; Schuller, I.K.

1982-08-31T23:59:59.000Z

416

Control of phase locking in a set of lasers with self-pumped phase-conjugate gain-grating mirrors using a passive Q-switch  

SciTech Connect

We studied the possibility of controlling phase-locked lasing of a set of lasers with self-pumped phase-conjugate gain-grating mirrors by using a passive Q-switch and selecting the gain of one of the lasers. The ranges of stable operation are calculated by mathematical simulation and well agree with the experimental results. Single-mode radiation in the form of trains of phase-locked laser pulses are experimentally obtained for the first time in a three-channel diffraction-coupled gain-grating Nd : YAG laser system with a LiF :F {sup -}{sub 2} passive Q-switch. The space-time pattern of the trains of 1.064-{mu}m nanosecond pulses is the same in the channels with and without Q-switch and their interference pattern contrast reaches 0.81. (control of laser radiation parameters)

Basiev, Tasoltan T; Gavrilov, A V; Smetanin, Sergei N; Fedin, Aleksandr V

2011-03-31T23:59:59.000Z

417

Development of Correlations for Pressure Loss/Drop Coefficients Obtained From Flow Testing of Fuel Assemblies in Framatome ANP's PHTF  

SciTech Connect

Thermal-hydraulic analyses of pressurized water reactor (PWR) and boiling water reactor (BWR) fuel assemblies are generally performed for either assembly thermal-hydraulic design, thermal-hydraulic compatibility evaluation, or cycle licensing thermal-hydraulic characterization. A key issue in all cases is the hydraulic resistance characterization of the assembly in which the assembly, its components and support plates, etc., are represented by their respective pressure loss and pressure drop coefficients. These hydraulic coefficients can be determined by single-phase flow testing in an experimental facility such as the Framatome ANP Portable Hydraulic Test Facility (PHTF) located at Richland Test Facilities (RTF) in Richland, WA. The goal of this paper is to present a uniform and consistent methodology for the development of coefficient correlations from data obtained from single phase pressure drop testing of PWR and BWR fuel assemblies and their components performed in the PHTF. This methodology reflects the years of accumulated experience from an existing facility with an ongoing test program. (authors)

Madni, Imtiaz K.; Stephens, Lance G.; Turner, Dave M. [Framatome ANP Inc. (United States)

2002-07-01T23:59:59.000Z

418

$p$-th Clustering coefficients $C_{p}$ and Adjacent Matrix for Networks: Formulation based on String  

E-Print Network (OSTI)

The phenomenon of six degrees of separation is an old but interesting problem. The considerations of the clustering coefficient reflecting triangular structures and its extension to square one to six degrees of separation have been made\\cite{Newm21}. Recently, Aoyama\\cite{Aoyama} has given some considerations to this problem in networks without loops, using a sort of general formalism, "string formalism". In this article, we describe relations between the string formulation proposed by Aoyama and an adjacent matrix. Thus we provided a reformulation of the string formulation proposed by \\cite{Aoyama} to analyze networks. According to it, we introduced a series of generalized $q$-$th$ clustering coefficients. The available rules between diagrams of graphs and formulae are also given based on the formulation. Next we apply the formulation to some subjects in order to mainly check consistency with former studies. By evaluating the clustering coefficient for typical networks studied well earlier, we confirm a validity of our formulation. Lastly we applied it to the subject of two degrees of separation.

Norihito Toyota

2009-12-15T23:59:59.000Z

419

Effects of Soiling and Cleaning on the Reflectance and Solar HeatGain of a Light-Colored Roofing Membrane  

Science Conference Proceedings (OSTI)

A roof with high solar reflectance and high thermalemittance (e.g., a white roof) stays coolin the sun, reducing coolingpower demand in a conditioned building and increasing comfort in anunconditioned building. The high initial solar reflectance of a whitemembrane roof (circa 0.8) can be degraded by deposition of soot, dust,and/or algae to about 0.6 (range 0.3 to 0.8, depending on exposure) Weinvestigate the effects of soiling and cleaning on the solar spectralreflectance and solar absorptance of 15 initially white or light-graymembrane samples taken from roofs across the United States. Soot andorganic carbon were the two identifiable strongly absorbing contaminantson the membranes. Wiping was effective at removing soot, and less so atremoving organic carbon. Rinsing and/or washing removed nearly all of theremaining soil layer, with the exceptions of (a) thin layers of organiccarbon and (b) isolated dark spots of algae. Bleach was required toremove the last two features. The ratio of solar reflectance to unsoiledsolar reflectance (a measure of cleanliness) ranged from 0.41 to 0.89 forthe soiled samples; 0.53to 0.95 for the wiped samples; 0.74 to 0.98 forthe rinsed samples; 0.79 to 1.00 for the washed samples; and 0.94 to 1.02for the bleached samples. However, the influence of membrane soiling andcleaning on roof heat gain is better gauged by variations in solarabsorptance. Relative solar absorptances (indicating solar heat gainrelative to that of the unsoiled membrane) ranged from 1.4 to 3.5 for thesoiled samples; 1.1 to 3.1 for the wiped samples; 1.0 to 2.0 for therinsed samples; 1.0 to 1.9 for the washed samples; and 0.9 to 1.3 for thebleached samples.

Levinson, Ronnen; Berdahl, Paul; Berhe, Asmeret Asefaw; Akbari,Hashem

2005-04-12T23:59:59.000Z

420

Demonstration of an 8.85 nm Gain-Saturated Table-Top Soft X-Ray Laser and Lasing down to 7.4 nm  

Science Conference Proceedings (OSTI)

We report the efficient generation of a gain-saturated 8.85 nm wavelength table-top soft x-ray laser operating at 1 Hz repetition rate and the observation of lasing at wavelengths as short as 7.36 nm in lanthanide ions.

Wang, Yong [Colorado State University, Fort Collins; Alessi, David [Colorado State University, Fort Collins; Luther, Brad [Colorado State University, Fort Collins; Yin, Liang [Colorado State University, Fort Collins; Martz, Dale [Colorado State University, Fort Collins; Berrill, Mark A [ORNL; Jorge, Rocca [Colorado State University, Fort Collins

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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.


421

Measurements of excitation rate coefficients for Al-like ions: Fe XIV, Ni XVI, and Cu XVII  

Science Conference Proceedings (OSTI)

Absolute excitation rate coefficients for Fe XVI and Ni xvi ions ions are measured spectroscopically in the Texas Experimental Tokamak. Previous measurements for the 3d-3p transition array of Cu XVII are verified and the measurements are extended to the 3s3p/sup 2/..-->..3s/sup 2/3p transition array of this ion. The experimental rate coefficient for the 3d-3p transition array of Fe XIV is 6.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160 eV and for Ni XVI and Cu XVII, the values are 4.2 x 10/sup -9/ and 3.8 x 10/sup -9/ cm/sup 3/ s/sup -1/, respectively, at an electron temperature near 240 eV. For the 3s3p/sup 2/ /sup 2/P/sub 3/2/..-->..3s/sup 2/3p /sup 2/P/sub 3/2/ transition array, the experimental excitation rate coefficient for Fe XIV is 8.2 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 160eV and for Ni XVI and Cu XVII the value is 5.5 x 10/sup -9/ cm/sup 3/ s/sup -1/ at an electron temperature near 240 eV. The uncertainty in these results is estimated to be +- 50% (one standard deviation). Computed values of absolute excitation rates in a distorted-wave approximation and Mewe's semiempirical formula are found to be in good agreement with the experimental values.

Datla, R.U.; Roberts, J.R.; Durst, R.D.; Hodge, W.L.; Klepper, C.C.; Rowan, W.L.; Mann, J.B.

1987-12-01T23:59:59.000Z

422

Fluorescence enhanced optical tomography on breast phantoms with measurements using a gain modulated intensified CCD imaging system  

E-Print Network (OSTI)

Fluorescence-enhanced optical imaging using near-infrared (NIR) light developed for in-vivo molecular targeting and reporting of cancer provides promising opportunities for diagnostic imaging. However, prior to the administration of unproven contrast agents, the benefits of fluorescence-enhanced optical imaging must be assessed in feasibility phantom studies. A novel intensified charge-coupled device (ICCD) imaging system has been developed to perform 3-D fluorescence tomographic imaging in the frequency-domain using near-infrared contrast agents. This study is unique since it (i) employs a large tissue-mimicking phantom (~1087 cc), which is shaped and sized to resemble a female breast and part of the extended chest wall region, and (ii) enables rapid data acquisition in the frequency-domain by using a gain-modulated ICCD camera. Diagnostic 3-D fluorescence-enhanced optical tomography is demonstrated using 0.5-1 cc single and multiple targets contrasted from their surrounding by ??M concentrations of Indocyanine green (ICG) in the breast-shaped phantom (10 cm diameter), under varying conditions of target-to-background absorption contrast ratios (1:0 and 100:1) and target depths (up to 3 cm deep). Boundary surface fluorescence measurements of referenced amplitude and phase shift were used along with the coupled diffusion equation of light propagation in order to perform 3-D image reconstructions using the approximate extended Kalman filter (AEKF) algorithm, and hence differentiate the target from the background based on fluorescent optical contrast. Detection of single and multiple targets is demonstrated under various conditions of target depths (up to 2 cm deep), absorption optical contrast ratio (1:0 and 100:1), target volumes (0.5-1 cc), and multiple targets (up to three 0.5 cc targets). The feasibility of 3-D image reconstructions from simultaneous multiple point excitation sources are presented. Preliminary lifetime imaging studies with 1:2 and 2:1 optical contrast in fluorescence lifetime of the contrast agents is also demonstrated. The specificity of the optical imager is further assessed from homogeneous phantom studies containing no fluorescently contrasted targets. While nuclear imaging currently provides clinical diagnostic opportunities using radioactive tracers, molecular targeting of tumors using non-ionizing NIR contrast agents tomographically imaged using the frequency-domain ICCD imaging system could possibly become a new method of diagnostic imaging.

Godavarty, Anuradha

2003-12-01T23:59:59.000Z

423

Prediction of the Effective Coefficient of Thermal Expansion of Heterogeneous Media using Two-point Correlation Functions  

DOE Green Energy (OSTI)

Statistical continuum mechanics is used to predict the coefficient of thermal expansion (CTE) for solid oxide fuel cell glass-ceramic seal materials with different morphology and crystallinity. Two-point correlation functions are utilized to represent the microstructure morphology and phase distribution. The model uses two-point correlation function representing microstructure, along with local properties, to predict the effective CTE. Prediction results agree well with experimental results. The advantage of the statistical continuum mechanics model in predicting the effective properties of anisotropic media is to take into consideration of microstructure.

Milhans, Jacqueline; Li, Dongsheng; Khaleel, Mohammad A.; Sun, Xin; Garmestani, Hamid

2011-04-20T23:59:59.000Z

424

DISTRIBUTION AND RANGE OF RADIONUCLIDE SORPTIOIN COEFFICIENTS IN A SAVANNAH RIVER SITE SUBSURFACE: STOCHASTIC MODELING CONSIDERATIONS - 10259  

SciTech Connect

The uncertainty associated with the sorption coefficient, or K{sub d} value, is one of the key uncertainties in estimating risk associated with burying low-level nuclear waste in the subsurface. The objective of this study was to measure >648 K{sub d} values and provide a measure of the range and distribution (normal or log-normal) of radionuclide K{sub d} values appropriate for the E-Area disposal site, within the Savannah River Site, near Aiken South Carolina. The 95% confidence level for the mean K{sub d} was twice the mean in the Aquifer Zone (18-30.5 m depth), equal to the mean for the Upper Vadose Zone (3.3-10 m depth), and half the mean for the Lower Vadose Zone (3.3-18 m depth). The distribution of K{sub d} values was log normal in the Upper Vadose Zone and Aquifer Zone, and normal in the Lower Vadose Zone. To our knowledge, this is the first report of natural radionuclide K{sub d} variability in the literature. Using ranges and distribution coefficients that are specific to the hydrostratigraphic unit improved model accuracy and reduced model uncertainty. Unfortunately, extension of these conclusions to other sites is likely not appropriate given that each site has its own sources of hydrogeological variability. However, this study provides one of the first examples of the development stochastic ranges and distributions of K{sub d} values for a hydrological unit for stochastic modeling.

Kaplan, D.

2010-01-04T23:59:59.000Z

425

Usefulness of specific calibration coefficients for gamma-emitting sources measured by radionuclide calibrators in nuclear medicine  

Science Conference Proceedings (OSTI)

Purpose: In nuclear medicine, the activity of a radionuclide is measured with a radionuclide calibrator that often has a calibration coefficient independent of the container type and filling. Methods: To determine the effect of the container on the accuracy of measuring the activity injected into a patient, The authors simulated a commercial radionuclide calibrator and 18 container types most typically used in clinical practice. The instrument sensitivity was computed for various container thicknesses and filling levels. Monoenergetic photons and electrons as well as seven common radionuclides were considered. Results: The quality of the simulation with gamma-emitting sources was validated by an agreement with measurements better than 4% in five selected radionuclides. The results show that the measured activity can vary by more than a factor of 2 depending on the type of container. The filling level and the thickness of the container wall only have a marginal effect for radionuclides of high energy but could induce differences up to 4%. Conclusions: The authors conclude that radionuclide calibrators should be tailored to the uncertainty required by clinical applications. For most clinical cases, and at least for the low-energy gamma and x-ray emitters, measurements should be performed with calibration coefficients specific to the container type.

Bochud, Francois O.; Laedermann, Jean-Pascal; Baechler, Sebastien; Kosinski, Marek; Bailat, Claude J. [Institute of Radiation Physics, University Hospital and University of Lausanne, Rue du Grand-Pre 1, CH-1007 Lausanne (Switzerland)

2011-07-15T23:59:59.000Z

426

The su(n) WZNW fusion ring as integrable model: a new algorithm to compute fusion coefficients  

E-Print Network (OSTI)

This is a proceedings article reviewing a recent combinatorial construction of the su(n) WZNW fusion ring by C. Stroppel and the author. It contains one novel aspect: the explicit derivation of an algorithm for the computation of fusion coefficients different from the Kac-Walton formula. The discussion is presented from the point of view of a vertex model in statistical mechanics whose partition function generates the fusion coefficients. The statistical model can be shown to be integrable by linking its transfer matrix to a particular solution of the Yang-Baxter equation. This transfer matrix can be identified with the generating function of an (infinite) set of polynomials in a noncommutative alphabet: the generators of the local affine plactic algebra. The latter is a generalisation of the plactic algebra occurring in the context of the Robinson-Schensted correspondence. One can define analogues of Schur polynomials in this noncommutative alphabet which become identical to the fusion matrices when represented as endomorphisms over the state space of the integrable model. Crucial is the construction of an eigenbasis, the Bethe vectors, which are the idempotents of the fusion algebra.

Christian Korff

2011-06-27T23:59:59.000Z

427

MASS TRANSFER COEFFICIENTS FOR A NON-NEWTONIAN FLUID AND WATER WITH AND WITHOUT ANTI-FOAM AGENTS  

DOE Green Energy (OSTI)

Mass transfer rates were measured in a large scale system, which consisted of an 8.4 meter tall by 0.76 meter diameter column containing one of three fluids: water with an anti-foam agent, water without an anti-foam agent, and AZ101 simulant, which simulated a non-Newtonian nuclear waste. The testing contributed to the evaluation of large scale mass transfer of hydrogen in nuclear waste tanks. Due to its radioactivity, the waste was chemically simulated, and due to flammability concerns oxygen was used in lieu of hydrogen. Different liquids were used to better understand the mass transfer processes, where each of the fluids was saturated with oxygen, and the oxygen was then removed from solution as air bubbled up, or sparged, through the solution from the bottom of the column. Air sparging was supplied by a single tube which was co-axial to the column, the decrease in oxygen concentration was recorded, and oxygen measurements were then used to determine the mass transfer coefficients to describe the rate of oxygen transfer from solution. Superficial, average, sparging velocities of 2, 5, and 10 mm/second were applied to each of the liquids at three different column fill levels, and mass transfer coefficient test results are presented here for combinations of superficial velocities and fluid levels.

Leishear, R.

2009-09-09T23:59:59.000Z

428

On the Use of a Wider Class of Linear Systems for the Design of Constant-Coefficients Semi-Implicit Time Schemes in NWP  

Science Conference Proceedings (OSTI)

The linearization of the meteorological equations around a specified reference state, usually applied in NWP to define the linear system of constant-coefficients semi-implicit schemes, is outlined as an unnecessarily restrictive approach that may ...

P. Bnard

2004-05-01T23:59:59.000Z

429

Sub-250 nm room-temperature optical gain from AlGaN/AlN multiple quantum wells with strong band-structure potential fluctuations  

Science Conference Proceedings (OSTI)

Deep-UV optical gain has been demonstrated in Al{sub 0.7}Ga{sub 0.3}N/AlN multiple quantum wells under femtosecond optical pumping. Samples were grown by molecular beam epitaxy under a growth mode that introduces band structure potential fluctuations and high-density nanocluster-like features within the AlGaN wells. A maximum net modal gain value of 118 {+-} 9 cm{sup -1} has been measured and the transparency threshold of 5 {+-} 1 {mu}J/cm{sup 2} was experimentally determined, corresponding to 1.4 x 10{sup 17} cm{sup -3} excited carriers. These findings pave the way for the demonstration of solid-state lasers with sub-250 nm emission at room temperature.

Francesco Pecora, Emanuele; Zhang Wei; Nikiforov, A.Yu.; Yin Jian; Paiella, Roberto; Dal Negro, Luca; Moustakas, T. D. [Department of Electrical and Computer Engineering and Photonics Center, Boston University, 8 Saint Mary's Street, Boston, Massachusetts 02215 (United States); Zhou Lin; Smith, David J. [Department of Physics, Arizona State University, Tempe, Arizona 85287 (United States)

2012-02-06T23:59:59.000Z

430

Kinetics of nonisothermal adsorption by biporous adsorbents. Communication 6. Description of kinetic adsorption curves with account of the temperature dependence of the intracrystalline diffusion coefficients  

SciTech Connect

An analytical description has been given of the kinetic adsorption curves with account of the influence of the change in adsorbent temperature due to the evolution of heat and adsorption on the coefficient of intracrystalline diffusion of the adsorbate. The deviation of the experimental kinetic curves for the adsorption of trans-2-butene by finely crystalline NaA zeolite from those calculated from the equation of isothermal diffusion is due to the influence of temperature on the coefficient of intracrystalline diffusion.

Broddak, R.; Voloshchuk, A.M.; Gorlov, V.A.; Dubinin, M.M.; Kochirzhik, M.

1987-01-10T23:59:59.000Z

431

Oxidation pretreatment to reduce corrosion of 20%Cr-25%Ni-Nb stainless steel. I. Weight gain and oxide thickness measurements  

Science Conference Proceedings (OSTI)

The improvement in corrosion resistance afforded by a low-pressure selective oxidation pretreatment on 20%Cr-25%Ni-Nb steel is assessed in terms of weight gain and oxide thickness measurements. Both can and sheet specimens were oxidized in a simulated CAGR CO/sub 2/ environment at 823, 923, and 1073 K, and gravimetric gross weight-gain measurements were supplemented by spinel and Cr/sub 2/O/sub 3/ oxide thickness measurements determined by X-ray diffractometry (XRD). The increased protection provided by the pretreatment resulted in a reduction in gross weigh gain of 3-4 times at 823 K, two and three times at 923 K, and a somewhat smaller improvement at higher temperatures. The improvement stemmed from the high proportion of Cr/sub 2/O/sub 3/ selectively formed in the preoxide layer itself. Thermally induced lattice strains in the oxide scale have been assessed from measurements of lattice expansion by XRD.

Tempest, P.A.; Wild, R.K.

1988-10-01T23:59:59.000Z

432

Strontium Distribution Coefficients of Basalt and Sediment Infill Samples from the Idaho National Engineering and Environmental Laboratory, Idaho  

Science Conference Proceedings (OSTI)

The U.S. Geological Survey and Idaho State University, in cooperation with the U.S. Department of Energy, are conducting a study to determine and evaluate strontium distribution coefficients (Kds) of subsurface materials at the Idaho National Engineering and Environmental Laboratory (INEEL). The purpose of this study is to aid in assessing the variability of strontium Kds at the INEEL as part of an ongoing investigation of chemical transport of strontium-90 in the Snake River Plain aquifer. Batch experimental techniques were used to determine Kds of six basalt core samples, five samples of sediment infill of vesicles and fractures, and six standard material samples. Analyses of data from these experiments indicate that the Kds of the sediment infill samples are significantly larger than those of the basalt samples. Quantification of such information is essential of furthering the understanding of transport processes of strontium-90 in the Snake River Plain aquifer and in similar environments.

M. N. Pace; R. C. Bartholomay (USGS); J. J. Rosentreter (ISU)

1999-07-01T23:59:59.000Z

433

Analytical and experimental results of the coefficient of thermal expansion of high-modulus graphite-epoxy materials  

Science Conference Proceedings (OSTI)

The coefficient of thermal expansion (CTE) as determined by the Classical Laminate Theory is very sensitive to some orthotropic elastic constants and to the laminate layup. In particular, the non-Hookean behavior of a unidirectional lamina in the fiber direction have to be taken into account to exactly predict the CTE. To verify the theoretical analysis, a new test facility has been designed to carefully measure the CTE in advanced composite materials having a quasi zero value of CTE. Measurement error in the CTE was minimized by a careful choice of displacement sensors and the high control of their thermal stability. The results show that a variation of +/- 1 deg in the lamina orientation can change the CTE of the quasi-isotropic laminate up to -/+ 50.5% of the theoretical value. A variation of +/- 5% in the physical and mechanical properties can change the CTE up to -/+ 48%. 14 refs.

Romeo, G.; Frulla, G. [Politecnico di Torino, Turin (Italy)

1995-09-01T23:59:59.000Z

434

Optimal investment and consumption in a Black--Scholes market with L\\'evy-driven stochastic coefficients  

E-Print Network (OSTI)

In this paper, we investigate an optimal investment and consumption problem for an investor who trades in a Black--Scholes financial market with stochastic coefficients driven by a non-Gaussian Ornstein--Uhlenbeck process. We assume that an agent makes investment and consumption decisions based on a power utility function. By applying the usual separation method in the variables, we are faced with the problem of solving a nonlinear (semilinear) first-order partial integro-differential equation. A candidate solution is derived via the Feynman--Kac representation. By using the properties of an operator defined in a suitable function space, we prove uniqueness and smoothness of the solution. Optimality is verified by applying a classical verification theorem.

Delong, Łukasz

2008-01-01T23:59:59.000Z

435

NIST Attenuation Coefficient Bibliography  

Science Conference Proceedings (OSTI)

... with each reference are annotations specifying the energy range covered and ... was funded [in part] by NIST's Systems Integration for Manufacturing ...

2011-12-09T23:59:59.000Z

436

Coefficients for Debiasing Forecasts  

Science Conference Proceedings (OSTI)

Skill-score decompositions can be used to analyze the effects of bias on forecasting skill. However, since bias terms are typically squared, and bias is measured in skill-score units rather than in units of the forecasts, such decompositions only ...

Thomas R. Stewart; Patricia Reagan-Cirincione

1991-08-01T23:59:59.000Z

437

New correlation to predict the heat transfer coefficient in-tube cooling of supercritical CO{sub 2} in horizontal macro-tubes  

Science Conference Proceedings (OSTI)

The heat transfer coefficient during gas cooling process of supercritical CO{sub 2} without lubricating oil in horizontal macro-tubes has experimentally investigated. Investigation has done on two stainless steel circular tubes having inside-diameter of 4.55 mm and 7.75 mm and carried out for CO{sub 2} mass fluxes of 200-600 kg/m{sup 2} s, inlet fluid pressures of 7.5-10.0 MPa, and the inlet fluid temperatures of 90-100 C. The experimental results indicate that the gas cooling pressure, the inner tube diameter, the mass flux and the temperature of CO{sub 2} have significant effects on the heat transfer coefficient, especially near pseudo-critical region. The heat transfer coefficient decreases as the cooling pressure increases otherwise increases as mass flux increases. At any temperatures, smaller inner tube diameter shows higher heat transfer coefficient. In comparison between present experimental data and existing correlations from references, most of supercritical heat transfer correlations show large deviations with this present experimental data. Therefore, based on experimental data obtained in this present work, a new correlation is proposed to predict more accurate heat transfer coefficient of supercritical CO{sub 2} in horizontal macro-tubes under cooling conditions. The majority of the experimental values are within 13% of the values predicted by the new correlation. (author)

Oh, Hoo-Kyu; Son, Chang-Hyo [Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Pusan 608-739 (Korea)

2010-11-15T23:59:59.000Z

438

Enhanced photocurrent gain and spectrum range based on the composite consisting of SnO{sub 2} nanowires and CdSe quantum dots  

Science Conference Proceedings (OSTI)

High sensitivity with additional spectral response based on the composite consisting of SnO{sub 2} nanowires (NWs) and CdSe quantum dots (QDs) has been demonstrated. The underlying mechanism is attributed to the spatial separation of photogenerated electrons and holes due to the charge transfer arising from type II band alignment between CdSe QD and SnO{sub 2} NW. This work shows that by selective decoration of suitable QDs, the photocurrent gain of NWs not only can be greatly enhanced, but also can be extended to a wider range photoresponse spectrum. Our result, therefore, provides a very useful guideline to create high efficiency photodetectors.

Lu, M. L.; Lin, C. H.; Chen, Y. F. [Department of Physics, National Taiwan University, Taipei 10617, Taiwan (China)

2011-08-22T23:59:59.000Z

439

Efficient Excitation of Gain-Saturated Sub-9-nm-Wavelength Tabletop Soft-X-Ray Lasers and Lasing Down to 7.36 nm  

Science Conference Proceedings (OSTI)

We have demonstrated the efficient generation of sub-9-nm-wavelength picosecond laser pulses of microjoule energy at 1-Hz repetition rate with a tabletop laser. Gain-saturated lasing was obtained at =8.85 nm in nickel-like lanthanum ions excited by collisional electron-impact excitation in a precreated plasma column heated by a picosecond optical laser pulse of 4-J energy. Furthermore, isoelectronic scaling along the lanthanide series resulted in lasing at wavelengths as short as =7.36 nm. Simulations show that the collisionally broadened atomic transitions in these dense plasmas can support the amplification of subpicosecond soft-x-ray laser pulses.

Alessi, David [Colorado State University, Fort Collins; Wang, Yong [Colorado State University, Fort Collins; Luther, Brad [Colorado State University, Fort Collins; Yin, Liang [Colorado State University, Fort Collins; Martz, Dale [Colorado State University, Fort Collins; Woolston, Mark [Colorado State University, Fort Collins; Liu, Yanwei [University of California, Berkeley & LBNL; Berrill, Mark A [ORNL; Jorge, Rocca [Colorado State University, Fort Collins

2011-01-01T23:59:59.000Z

440

Full surface local heat transfer coefficient measurements in a model of an integrally cast impingement cooling geometry  

SciTech Connect

Cast impingement cooling geometries offer the gas turbine designer higher structural integrity and improved convective cooling when compared to traditional impingement cooling systems, which rely on plate inserts. In this paper, it is shown that the surface that forms the jets contributes significantly to the total cooling. Local heat transfer coefficient distributions have been measured in a model of an engine wall cooling geometry using the transient heat transfer technique. The method employs temperature-sensitive liquid crystals to measure the surface temperature of large-scale perspex models during transient experiments. Full distributions of local Nusselt number on both surfaces of the impingement plate, and on the impingement target plate, are presented at engine representative Reynolds numbers. The relative effects of the impingement plate thermal boundary condition and the coolant supply temperature on the target plate heat transfer have been determined by maintaining an isothermal boundary condition at the impingement plate during the transient tests. The results are discussed in terms of the interpreted flow field.

Gillespie, D.R.H.; Wang, Z.; Ireland, P.T. [Univ. of Oxford (United Kingdom). Dept. of Engineering Science; Kohler, S.T. [Rolls Royce, Bristol (United Kingdom)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gain coefficient cxs" 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.


441

The thermal expansion coefficient as a key design parameter for thermoelectric materials and its relationship to processing-dependent bloating  

Science Conference Proceedings (OSTI)

The coefficient of thermal expansion (CTE) is a key design parameter for thermoelectric (TE) materials, especially in energy harvesting applications since stresses generated by CTE mismatch, thermal gradients, and thermal transients scale with the CTE of the TE material. For the PbTe PbS-based TE material (Pb 0.95 Sn 0.05 Te) 0.92(PbS) 0.08 0.055 % PbI 2 over the temperature ranges of 293 543 and 293 773 K, a CTE, alpha avg , of 21.4 0.3 x 10-6 K-1 was measured using (1) dilatometry and (2) high-temperature X-ray diffraction (HT-XRD) for powder and bulk specimens. The CTE values measured via dilatometry and HT-XRD are similar to the literature values for other Pb-based chalcogenides. However, the processing technique was found to impact the thermal expansion such that bloating (which leads to a hysteresis in thermal expansion) occurred for hot pressed billets heated to temperatures [603 K while specimens fabricated by pulsed electric current sintering and as-cast specimens did not show a bloating-modified thermal expansion even for temperatures up to 663 K. The relationship of bloating to the processing techniques is discussed, along with a pos- sible mechanism for inhibiting bloating in powder processed specimens.

Ni, Jennifer E. [Michigan State University, East Lansing; Case, Eldon D [Michigan State University, East Lansing; Schmidt, Robert [Michigan State University, East Lansing; Wu, Chun-I [Michigan State University, East Lansing; Hogan, Timothy [Michigan State University, East Lansing; Trejo, Rosa M [ORNL; Kirkham, Melanie J [ORNL; Lara-Curzio, Edgar [ORNL; Kanatzidis, Mercouri G. [Northwestern University, Evanston

2013-01-01T23:59:59.000Z

442

Transport Properties of Bulk Thermoelectrics An International Round-Robin Study, Part I: Seebeck Coefficient and Electrical Resistivity  

Science Conference Proceedings (OSTI)

Recent research and development of high temperature thermoelectric materials has demonstrated great potential of converting automobile exhaust heat directly into electricity. Thermoelectrics based on classic bismuth telluride have also started to impact the automotive industry by enhancing air conditioning efficiency and integrated cabin climate control. In addition to engineering challenges of making reliable and efficient devices to withstand thermal and mechanical cycling, the remaining issues in thermoelectric power generation and refrigeration are mostly materials related. The figure-of-merit, ZT, still needs to improve from the current value of 1.0 - 1.5 to above 2 to be competitive to other alternative technologies. In the meantime, the thermoelectric community could greatly benefit from the development of international test standards, improved test methods and better characterization tools. Internationally, thermoelectrics have been recognized by many countries as an important area for improving energy efficiency. The International Energy Agency (IEA) group under the implementing agreement for Advanced Materials for Transportation (AMT) identified thermoelectric materials as an important area in 2009. This paper is Part I of the international round-robin testing of transport properties of bulk thermoelectrics. The main focuses in Part I are on two electronic transport properties: Seebeck coefficient and electrical resistivity.

Wang, Hsin [ORNL; Porter, Wallace D [ORNL; Bottner, Harold [Fraunhofer-Institute, Freiburg, Germany; Konig, Jan [Fraunhofer-Institute, Freiburg, Germany; Chen, Lidong [Chinese Academy of Sciences; Bai, Shengqiang [Chinese Academy of Sciences; Tritt, Terry M. [Clemson University; Mayolett, Alex [Corning, Inc; Senawiratne, Jayantha [Corning, Inc; Smith, Charlene [Corning, Inc; Harris, Fred [ZT-Plus; Gilbert, Partricia [Marlow Industries, Inc; Sharp, Jeff [Marlow Industries, Inc; Lo, Jason [CANMET - Materials Technology Laboratory, Natural Resources of Canada; Keinke, Holger [University of Waterloo, Canada; Kiss, Laszlo I. [University of Quebec at Chicoutimi

2013-01-01T23:59:59.000Z

443

Analytical formulas, general properties and calculation of transport coefficients in the hadron gas: shear and bulk viscosities  

E-Print Network (OSTI)

Elaborated calculations of the shear and the bulk viscosities in the hadron gas, using the ultrarelativistic quantum molecular dynamics (UrQMD) model cross sections, are made. These cross sections are analyzed and improved. A special treatment of the resonances is implemented additionally. All this allows for better hydrodynamical description of the experimental data. The previously considered approximation of one constant cross section for all hadrons is justified. It's found that the bulk viscosity of the hadron gas is much larger than the bulk viscosity of the pion gas while the shear viscosity is found to be less sensitive to the hadronic mass spectrum. The maximum of the bulk viscosity of the hadron gas is expected to be approximately in the temperature range ${T=150 190 MeV}$ with zero chemical potentials. This range covers the critical temperature values found from lattice calculations. We comment on some important aspects of calculations of the bulk viscosity, which were not taken into account or were not analyzed well previously. Doing this, a generalized Chapman-Enskog procedure, taking into account deviations from the chemical equilibrium, is outlined. Some general properties, features, the physical meaning of the bulk viscosity and some other comments on the deviations from the chemical equilibrium supplement this discussion. Analytical closed-form expressions for the transport coefficients and some related quantities within a quite large class of cross sections can be obtained. Some examples are explicitly considered. Comparisons with some previous calculations of the viscosities in the hadron gas and the pion gas are done.

Oleg Moroz

2013-01-28T23:59:59.000Z

444

Black Carbon Concentrations and Diesel Vehicle Emission Factors Derived from Coefficient of Haze Measurements in California: 1967-2003  

SciTech Connect

We have derived ambient black carbon (BC) concentrations and estimated emission factors for on-road diesel vehicles from archived Coefficient of Haze (COH) data that was routinely collected beginning in 1967 at 11 locations in the San Francisco Bay Area. COH values are a measure of the attenuation of light by particles collected on a white filter, and available data indicate they are proportional to BC concentrations measured using the conventional aethalometer. Monthly averaged BC concentrations are up to five times greater in winter than summer, and, consequently, so is the population?s exposure to BC. The seasonal cycle in BC concentrations is similar for all Bay Area sites, most likely due to area-wide decreased pollutant dispersion during wintertime. A strong weekly cycle is also evident, with weekend concentrations significantly lower than weekday concentrations, consistent with decreased diesel traffic volume on weekends. The weekly cycle suggests that, in the Bay Area, diesel vehicle emissions are the dominant source of BC aerosol. Despite the continuous increase in diesel fuel consumption in California, annual Bay Area average BC concentrations decreased by a factor of ~;;3 from the late 1960s to the early 2000s. Based on estimated annual BC concentrations, on-road diesel fuel consumption, and recent measurements of on-road diesel vehicle BC emissions, diesel BC emission factors decreased by an order of magnitude over the study period. Reductions in the BC emission factor reflect improved engine technology, emission controls and changes in diesel fuel composition. A new BC monitoring network is needed to continue tracking ambient BC trends because the network of COH monitors has recently been retired.

Tast, CynthiaL; Kirchstetter, Thomas W.; Aguiar, Jeffery; Tonse, Shaheen; Novakov, T.; Fairley, David

2007-11-09T23:59:59.000Z

445

Black Carbon Concentrations and Diesel Vehicle Emission FactorsDerived from Coefficient of Haze Measurements in California:1967-2003  

SciTech Connect

We have derived ambient black carbon (BC) concentrations and estimated emission factors for on-road diesel vehicles from archived Coefficient of Haze (COH) data that was routinely collected beginning in 1967 at 11 locations in the San Francisco Bay Area. COH values are a measure of the attenuation of light by particles collected on a white filter, and available data indicate they are proportional to BC concentrations measured using the conventional aethalometer. Monthly averaged BC concentrations are up to five times greater in winter than summer, and, consequently, so is the population's exposure to BC. The seasonal cycle in BC concentrations is similar for all Bay Area sites, most likely due to area-wide decreased pollutant dispersion during wintertime. A strong weekly cycle is also evident, with weekend concentrations significantly lower than weekday concentrations, consistent with decreased diesel traffic volume on weekends. The weekly cycle suggests that, in the Bay Area, diesel vehicle emissions are the dominant source of BC aerosol. Despite the continuous increase in diesel fuel consumption in California, annual Bay Area average BC concentrations decreased by a factor of {approx}3 from the late 1960s to the early 2000s. Based on estimated annual BC concentrations, on-road diesel fuel consumption, and recent measurements of on-road diesel vehicle BC emissions, diesel BC emission factors decreased by an order of magnitude over the study period. Reductions in the BC emission factor reflect improved engine technology, emission controls and changes in diesel fuel composition. A new BC monitoring network is needed to continue tracking ambient BC trends because the network of COH monitors has recently been retired.

Kirchstetter, Thomas W.; Aguiar, Jeffery; Tonse, Shaheen; Novakov, T.

2007-10-01T23:59:59.000Z

446

Investigation of the Heat Transfer Coefficient of Liquid and Gas Bubble Train Flow in a Square Mini-channel Using Infra-Red thermography  

E-Print Network (OSTI)

Investigation of the Heat Transfer Coefficient of Liquid and Gas Bubble Train Flow in a Square Mini slug and bubbles, liquid and gas superficial velocities which depend on the volume flow ratio of the channel (Bo) for specific liquid and gas phase. At relatively high Bo (Bo>Bocr1.835) systems gravity force

Khandekar, Sameer

447

Transport coefficients of n-butane into and through the surface of silicalite-1 from non-equilibrium molecular dynamics study  

E-Print Network (OSTI)

Transport coefficients of n-butane into and through the surface of silicalite-1 from non dynamics Non-equilibrium thermodynamics Silicalite-1 n-Butane adsorption a b s t r a c t We have studied coupled heat and mass transfer of n-butane through a membrane of silicalite-1. A description

Kjelstrup, Signe

448

The Study of Electromagnetic Wave Propogation in Photonic Crystals Via Planewave Based Transfer (Scattering) Matrix Method with Active Gain Material Applications  

SciTech Connect

In this dissertation, a set of numerical simulation tools are developed under previous work to efficiently and accurately study one-dimensional (1D), two-dimensional(2D), 2D slab and three-dimensional (3D) photonic crystal structures and their defects effects by means of spectrum (transmission, reflection, absorption), band structure (dispersion relation), and electric and/or magnetic fields distribution (mode profiles). Furthermore, the lasing property and spontaneous emission behaviors are studied when active gain materials are presented in the photonic crystal structures. Various physical properties such as resonant cavity quality factor, waveguide loss, propagation group velocity of electromagnetic wave and light-current curve (for lasing devices) can be obtained from the developed software package.

Ming LI

2007-12-01T23:59:59.000Z

449

Broadening and shifting of the methanol 119 {mu}m gain line of linear and circular polarization by collision with chiral molecules  

Science Conference Proceedings (OSTI)

Evidence of circular dichroism has been observed in the spectral properties of a gas of left-right symmetric molecules. This dichroism comes about as the result of collisions of the symmetric molecules with left-right asymmetric molecules introduced as a buffer gas. In this sense, the dichroism can be said to have been transferred from the chiral buffer molecules to the symmetric, non-chiral molecules of the background vapor. This transferred dichroism appears as broadening in the gain line of the symmetric molecule which is asymmetric with respect to the right or left handedness of a circularly polarized probe. The broadening of the 119 {mu}m line of the methanol molecule was observed using infrared-far infrared double resonance spectroscopy.

J.S. Bakos; G. Djotyan; Zsuzsa Soerlei; J. Szigeti; D. K. Mansfield; J. Sarkozi

2000-06-21T23:59:59.000Z

450

Spectral linewidth of a Ne-like Ar capillary discharge soft x-ray laser and its dependence on amplification beyond gain-saturation  

Science Conference Proceedings (OSTI)

We report the measurement of the linewidth and temporal coherence of a = 46.9 nm neon-like argon capillary discharge soft x-ray laser and its variation with plasma column length. A wavefront division interferometer was used to resolve the 3p 1S0-3s 1P1 laser line, resulting in a measured relative linewidths of / = 3-4 10 -5. The measurements do not observe saturation re-broadening as this clearly dominantly Doppler-broadened inhomogeneous line is amplified beyond the intensity corresponding to gain saturation. Model simulations indicate that this is the result of comparatively small collisional broadening that homogenizes the line profile to practically eliminate inhomogeneous saturation re-broadening. Collisional re-distribution is computed to only play a minor role in homogenizing the line profile.

Urbanski, Lukasz [Colorado State University, Fort Collins; Marconi, Mario [Colorado State University, Fort Collins; Meng, L. M. [Colorado State University, Fort Collins; Berrill, Mark A [ORNL; Guilbaud, O. [Universite Paris Sud, Orsay, France; Klisnick, Annie [Universite Paris Sud, Orsay, France; Rocca, Jorge [Colorado State University, Fort Collins

2012-01-01T23:59:59.000Z

451

Heat gain from power panelboard.  

E-Print Network (OSTI)

??This thesis focuses on estimating the power loss from power panelboards by means of power loss models. The model is intended to be used by (more)

Piesciorovsky, Emilio Carlos

2009-01-01T23:59:59.000Z

452

WTA offers big efficiency gains  

Science Conference Proceedings (OSTI)

The next major step forward for brown coal fired power generation looks like being the RWE-developed fluidised bed based WTA process for precombustion drying of this high moisture fuel. WTA stands for Wirbelschicht-Trocknung mit interner Abwaermenutzung (fluidized bed drying with internal heat recovery). A large scale pilot plant is due to start operation early next year at Niederaussem K in Germany, while a WTA system is to be retrofitted to the Hazlewood plant in Australia. 1 ref., 7 figs.

Stamatelopoulos, G.-N. [Alstom Power System (Germany)

2007-12-15T23:59:59.000Z

453

High temperature electronic gain device  

SciTech Connect

An integrated thermionic device suitable for use in high temperature, high radiation environments. Cathode and control electrodes are deposited on a first substrate facing an anode on a second substrate. The substrates are sealed to a refractory wall and evacuated to form an integrated triode vacuum tube.

McCormick, J. Byron (Los Alamos, NM); Depp, Steven W. (Los Alamos, NM); Hamilton, Douglas J. (Tucson, AZ); Kerwin, William J. (Tucson, AZ)

1979-01-01T23:59:59.000Z

454

NOx Reduction through Efficiency Gain  

E-Print Network (OSTI)

Benz Air Engineering and the CompuNOx system focus on a controls approach to minimize emissions without exposing steam generation plants to an unbearable financial burden. With minimal system changes we use thorough system analysis in conjunction with a novel control design to deliver a comprehensive boiler controls retrofit that provides reductions in emissions as well as substantial cost savings. Combining mechanical engineering expertise with substantial experience in control engineering in over 200 retrofits this system achieves astonishing results with short payback time, making CompuNOx a feasible solution for emission mandates and cost savings.

Benz, R.; Thompson, R.; Staedter, M.

2007-01-01T23:59:59.000Z

455

Insights gained from aging research  

Science Conference Proceedings (OSTI)

The US NRC Office of Nuclear Regulatory Research has implemented hardware-oriented engineering research programs to identify and resolve technical issues related to the aging of systems, structures, and components (SSCs) in operating nuclear power plants. This report provides a summary of those research results which have been compiled and published in NUREGS and related technical reports. The systems, components and structures that have been studied are organized by alphabetical order. The research results summary on the SSCs is followed by an assessment guide to emphasize inspection techniques which may be useful for detecting aging degradation in nuclear power plants. This report will be updated periodically to reflect new research results on these or other SSCs.

Blahnik, D.E.; Casada, D.A.; Edson, J.L.; Fineman, D.L.; Gunther, W.E.; Haynes, H.D.; Hoopingarner, K.R.; Jacobus, M.J.; Jarrell, D.B.; Kryter, R.C.; Magelby, H.L.; Murphy, G.A.; Subudhi, M.M.

1992-03-01T23:59:59.000Z

456

Imaging radiation detector with gain  

DOE Patents (OSTI)

A radiation imaging device which has application in x-ray imaging. The device can be utilized in CAT scanners and other devices which require high sensitivity and low x-ray fluxes. The device utilizes cumulative multiplication of charge carriers on the anode plane and the collection of positive ion charges to image the radiation intensity on the cathode plane. Parallel and orthogonal cathode wire arrays are disclosed as well as a two-dimensional grid pattern for collecting the positive ions on the cathode.

Morris, C.L.; Idzorek, G.C.; Atencio, L.G.

1982-07-21T23:59:59.000Z

457

Imaging radiation detector with gain  

DOE Patents (OSTI)

A radiation imaging device which has application in x-ray imaging. The device can be utilized in CAT scanners and other devices which require high sensitivity and low x-ray fluxes. The device utilizes cumulative multiplication of charge carriers on the anode plane and the collection of positive ion charges to image the radiation intensity on the cathode plane. Parallel and orthogonal cathode wire arrays are disclosed as well as a two-dimensional grid pattern for collecting the positive ions on the cathode.

Morris, Christopher L. (Los Alamos, NM); Idzorek, George C. (Los Alamos, NM); Atencio, Leroy G. (Espanola, NM)

1984-01-01T23:59:59.000Z

458

Lot sizing with inventory gains  

E-Print Network (OSTI)

the problem of scheduling the shutdown of nuclear reactors for refuelling and maintenance ... nuclear plant refuelling, as well as how much energy should be produced by nuclear and ...... Perishable inventory theory: A review. Operations Re-.

459

A linear fluid inertia model for improved prediction of force coefficients in grooved squeeze film dampers and grooved oil seal rings  

E-Print Network (OSTI)

In Squeeze Film Dampers, (SFD), grooves (deep or shallow) are used to feed oil into the damper and prevent oil starvation within the fluid film lands. In oil seals with film land of clearance c, short shallow grooves (depth ? 15c, length ? 30c) are machined to reduce the cross-coupled stiffness coefficients, and thus improve the seal stability characteristics. Moreover, test stands for these devices can also incorporate grooves or recesses as part of oil feeding/ discharge arrangements. A common assumption is that these grooves do not influence the test system forced response. However, unexpected large added mass coefficients are reported in these configurations and not adequately predicted. In the case of grooved oil seals, experimental results also show that circumferential grooves do aid to reduce cross-coupled force coefficients but to a lesser extent than predictions otherwise indicate. A linear fluid inertia model for analysis of multiple-groove SFD or oil seal configurations is advanced. A perturbation analysis for small motion about a journal centered and off-centered position yields zeroth and first order flow equations defined at each individual flow region (land and grooves) of constant clearance ( c ).The analysis considers both the circumferential and axial dynamic pressure variations across the groove and land regions. At the groove regions, an effective groove depth ( d? ) and effective clearance (c d c ? ? = + ) are defined based on qualitative observations of the laminar flow pattern through annular cavities. This depth differs from the actual physical groove depth. The boundary conditions at the inlet and exit plane are a function of the geometric configuration. Integration of the resulting dynamic pressure fields on the journal surface yields the force coefficients (stiffness, damping, and inertia). Comparisons between predicted and experimental force coefficients for a grooved oil seal and a SFD show excellent correlation over a narrow range of effective groove depths. The results confirm that large added mass coefficients are associated to the feed/discharge grooves in the scrutinized test configurations. Furthermore, predictions, benchmarking experimental data, corroborate that short inner land grooves in an oil seal do not isolate the pressure field of the adjacent film lands, and hence contribute greatly to the force response of the seal.

Delgado-Marquez, Adolfo

2008-12-01T23:59:59.000Z

460

Understanding Partition Coefficient, Kd, Values Volume II: Review of Geochemistry and Available Kd Values for Cadmium, Cesium, Chromium, Lead, Plutonium, Radon, Strontium, Thorium, Tritium (3H), and Uranium  

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

Air and Radiation Air and Radiation EPA 402-R-99-004B Environmental Protection August 1999 Agency UNDERSTANDING VARIATION IN PARTITION COEFFICIENT, K d , VALUES Volume II: Review of Geochemistry and Available K d Values for Cadmium, Cesium, Chromium, Lead, Plutonium, Radon, Strontium, Thorium, Tritium ( 3 H), and Uranium UNDERSTANDING VARIATION IN PARTITION COEFFICIENT, K d , VALUES Volume II: Review of Geochemistry and Available K d Values for Cadmium, Cesium, Chromium, Lead, Plutonium, Radon, Strontium, Thorium, Tritium ( 3 H), and Uranium August 1999 A Cooperative Effort By: Office of Radiation and Indoor Air Office of Solid Waste and Emergency Response U.S. Environmental Protection Agency Washington, DC 20460 Office of Environmental Restoration U.S. Department of Energy Washington, DC 20585

Note: This page contains sample records for the topic "gain coefficient cxs" 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.


461

Observations of Co4+ in a Higher Spin State and the Increase in the Seebeck Coefficient of Thermoelectric Ca3Co4O9  

SciTech Connect

Ca{sub 3}Co{sub 4}O{sub 9} has a unique structure that leads to exceptionally high thermoelectric transport. Here we report the achievement of a 27% increase in the room-temperature in-plane Seebeck coefficient of Ca{sub 3}Co{sub 4}O{sub 9} thin films. We combine aberration-corrected Z-contrast imaging, atomic-column resolved electron energy-loss spectroscopy, and density-functional calculations to show that the increase is caused by stacking faults with Co4+-ions in a higher spin state compared to that of bulk Ca{sub 3}Co{sub 4}O{sub 9}. The higher Seebeck coefficient makes the Ca{sub 3}Co{sub 4}O{sub 9} system suitable for many high temperature waste-heat-recovery applications.

Klie, Robert F [University of Illinois, Chicago; Qiao, Q. [University of Illinois, Chicago; Paulauskas, T. [University of Illinois, Chicago; Gulec, A. [University of Illinois, Chicago; Rebola, A. [University of Illinois, Chicago; Ogut, Serdar [University of Illinois, Chicago; Prange, Micah P [Vanderbilt University; Idrobo Tapia, Juan C [ORNL; Pantelides, Sokrates T. [Vanderbilt University; Kolesnik, S. [Northern Illinois University; Dabrowski, B. [Argonne National Laboratory (ANL); Ozdemir, M. [University of Alabama, Tuscaloosa; Boyraz, C. [University of Alabama, Tuscaloosa; Mazumdar, Dipanjan [University of Alabama, Tuscaloosa; Gupta, Dr. Arunava [University of Alabama, Tuscaloosa

2012-01-01T23:59:59.000Z

462

Vapor pressure measurements on non-aqueous electrolyte solutions. Part 2. Tetraalkylammonium salts in methanol. Activity coefficients of various 1-1 electrolytes at high concentrations  

SciTech Connect

Precise vapor pressure data for solutions of Et/sub 4/NBr, Bu/sub 4/NBr, Bu/sub 4/Nl, Bu/sub 4/NClO/sub 4/, and Am/sub 4/NBr in methanol at 25/sup 0/C in the concentration range 0.04 < m(mol-(kg of solvent)/sup -1/) < 1.6 are communicated and discussed. Polynomials in molalities are given which may be used for calculating precise vapor pressure depressions of these solutions. Osmotic coefficients are calculated by taking into account the second virial coefficient of methanol vapor. Discussion of the data at low concentrations is based on the chemical model of electrolyte solutions taking into account non-coulombic interactions; ion-pair association constants are compared to those of conductance measurements. Pitzer equations are used to reproduce osmotic and activity coefficient at high concentrations; the set of Pitzer parameters b = 3.2, ..cap alpha../sub 1/ = 2.0 and ..cap alpha../sub 2/ = 20.0 is proposed for methanol solutions.

Barthel, J.; Lauermann, G.; Neueder, R.

1986-10-01T23:59:59.000Z

463

Remote Sensing D/H Ratios in Methane Ice: Temperature-Dependent Absorption Coefficients of CH3D in Methane Ice and in Nitrogen Ice  

E-Print Network (OSTI)

The existence of strong absorption bands of singly deuterated methane (CH3D) at wavelengths where normal methane (CH4) absorbs comparatively weakly could enable remote measurement of D/H ratios in methane ice on outer solar system bodies. We performed laboratory transmission spectroscopy experiments, recording spectra at wavelengths from 1 to 6 \\mum to study CH3D bands at 2.47, 2.87, and 4.56 \\mum, wavelengths where ordinary methane absorption is weak. We report temperature-dependent absorption coefficients of these bands when the CH3D is diluted in CH4 ice and also when it is dissolved in N2 ice, and describe how these absorption coefficients can be combined with data from the literature to simulate arbitrary D/H ratio absorption coefficients for CH4 ice and for CH4 in N2 ice. We anticipate these results motivating new telescopic observations to measure D/H ratios in CH4 ice on Triton, Pluto, Eris, and Makemake.

Grundy, W M; Bovyn, M J; Tegler, S C; Cornelison, D M

2011-01-01T23:59:59.000Z

464

APPLICATION OF WATER-JET HORIZONTAL DRILLING TECHNOLOGY TO DRILL AND ACIDIZE HORIZONTAL DRAIN HOLES, TEDBIT (SAN ANDRES) FIELD, GAINES COUNTY, TEXAS  

SciTech Connect

The San Andres Formation is one of the major hydrocarbon-producing units in the Permian Basin, with multiple reservoirs contained within the dolomitized subtidal portions of upward shoaling carbonate shelf cycles. The test well is located in Tedbit (San Andres) Field in northeastern Gaines County, Texas, in an area of scattered San Andres production associated with local structural highs. Selected on the basis of geological and historical data, the Oil and Gas Properties Wood No. 1 well is considered to be typical of a large number of San Andres stripper wells in the Permian Basin. Thus, successful completion of horizontal drain holes in this well would demonstrate a widely applicable enhanced recovery technology. Water-jet horizontal drilling is an emerging technology with the potential to provide significant economic benefits in marginal wells. Forecast benefits include lower recompletion costs and improved hydrocarbon recoveries. The technology utilizes water under high pressure, conveyed through small-diameter coiled tubing, to jet horizontal drain holes into producing formations. Testing of this technology was conducted with inconclusive results. Paraffin sludge and mechanical problems were encountered in the wellbore, initially preventing the water-jet tool from reaching the kick-off point. After correcting these problems and attempting to cut a casing window with the water-jet milling assembly, lateral jetting was attempted without success.

Michael W. Rose

2005-09-22T23:59:59.000Z

465

Recommended Distribution Coefficients, Kd Values, for Special Analysis Risk Calculations Related to Waste Disposal and Tank Closure on the Savannah River Site  

Science Conference Proceedings (OSTI)

The purpose of this document is to provide a technically defensible list of distribution coefficients, or Kd values, for use in performance assessment (PA) and special analysis (SA) calculations on the SRS. Only Kd values for radionuclides that have new information related to them or that have recently been recognized as being important are discussed in this report. Some 150 Kd values are provided in this report for various waste-disposal or tank-closure environments: soil, corrosion in grout, oxidizing grout waste, gravel, clay, and reducing concrete environments. Documentation and justification for the selection of each Kd value is provided.

Kaplan, D

2005-08-31T23:59:59.000Z

466

Gel'fand-Zetlin Basis and Clebsch-Gordan Coefficients for Covariant Representations of the Lie superalgebra gl(m|n)  

E-Print Network (OSTI)

A Gel'fand-Zetlin basis is introduced for the irreducible covariant tensor representations of the Lie superalgebra gl(m|n). Explicit expressions for the generators of the Lie superalgebra acting on this basis are determined. Furthermore, Clebsch-Gordan coefficients corresponding to the tensor product of any covariant tensor representation of gl(m|n) with the natural representation V ([1,0,...,0]) of gl(m|n) with highest weight (1,0,. . . ,0) are computed. Both results are steps for the explicit construction of the parastatistics Fock space.

N. I. Stoilova; J. Van der Jeugt

2010-04-14T23:59:59.000Z

467

The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho  

Science Conference Proceedings (OSTI)

The U.S. Geological Survey and Idaho State University, in cooperation with the U.S. Department of Energy, conducted a study to determine strontium distribution coefficients (Kds) of surficial sediments at the Idaho National Engineering and Environmental Laboratory (INEEL). Batch experimental techniques were used to determine experimental Kds of 20 surficial-sediment samples from the INEEL. The Kds describe the distribution of a solute between the solution and solid phase. A best-fit model was obtained using a four-variable data set consisting of surface area, manganese oxide concentration, specific conductance, and pH. Application of the model to an independent split of the data resulted in an average relative error of prediction of 20 percent and a correlation coefficient of 0.921 between predicted and observed strontium Kds. Chemical and physical characteristics of the solution and sediment that could successfully predict the Kd values were identified. Prediction variable select ion was limited to variables which are either easily determined or have available tabulated characteristics. The selection criterion could circumvent the need for time- and labor-intensive laboratory experiments and provide an alternate faster method for estimating strontium Kds.

J. J. Rosentreter; R. Nieves; J. Kalivas; J. P. Rousseau; R. C. Bartholomay

1999-06-01T23:59:59.000Z

468

Test for Modeling Windows in DOE 2.1E for Comparing the Window Library with the Shading Coefficient Method for a Single-Family Residence in Texas  

E-Print Network (OSTI)

This study examines the difference of the window simulation test between the Shading Coefficient (SC) and the Window Library (WL) Methods on DOE 2.1E of the 2000 IECC (International Energy Conservation Code) for single-family residences in Texas. The window simulation tests are performed using single-pane, double-pane, and low-e glass on two standard DOE 2.1E single-family house models: 1) the model which has the R-value for wall, roof and floor according to 2000 IECC (Quick Wall), and 2) the model which has the real wood frame wall and has the same R-value as the first one (Thermal Wall). The analysis showed different results according to the types of the glass, simulation method (Shading Coefficient or Window Library), and types of wall (quick wall and thermal wall). The saving of daily peak heating (kBtu/day) from single-pane to low-e glass on thermal mass and quick wall shows the most variation.

Kim, S.; Haberl, J. S.

2008-07-18T23:59:59.000Z

469

Measurement of the absorption coefficient for light laterally propagating in light-emitting diode structures with In{sub 0.2}Ga{sub 0.8}N/GaN quantum wells  

SciTech Connect

A procedure for measuring the absorption coefficient for light propagating parallel to the surface of a GaN-based light emitting diode chip on a sapphire substrate is suggested. The procedure implies the study of emission from one end face of the chip as the opposite end face is illuminated with a light emitting diode. The absorption coefficient is calculated from the ratio between the intensities of emission emerging from the end faces of the sapphire substrate and the epitaxial layer. From the measurements for chips based on p-GaN/In{sub 0.2}Ga{sub 0.8}N/n-GaN structures, the lateral absorption coefficient is determined at a level of (23 {+-} 3)cm{sup -1} at a wavelength of 465 nm. Possible causes for the discrepancy between the absorption coefficients determined in the study and those reported previously are analyzed.

Lelikov, Yu. S.; Bochkareva, N. I.; Gorbunov, R. I.; Martynov, I. A.; Rebane, Yu. T.; Tarkin, D. V.; Shreter, Yu. G. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)], E-mail: YShreter@mail.ioffe.ru

2008-11-15T23:59:59.000Z

470

Estimation of uranium and cobalt-60 distribution coefficients and uranium-235 enrichment at the Combustion Engineering Company site in Windsor, Connecticut  

SciTech Connect

Site-specific distribution coefficients for uranium isotopes and cobalt-60 (Co-60) and the fraction of uranium-235 (U-235) enrichment by mass were estimated for environmental samples collected from the Combustion Engineering Company site in Windsor, CT. This site has been identified for remedial action under the US Department of Energy`s (DOE) Formerly Utilized Sites Remedial Action Program. The authority of DOE at the Combustion Engineering site is limited to (1) Building 3; (2) other activities or areas associated exclusively with Building 3 (such as sewer lines); or (3) contamination that is exclusively highly enriched uranium. In this study, 16 samples were collected from the Combustion Engineering site, including 8 soil, 4 sediment, 3 water, and 1 water plus sludge sample. These samples were analyzed for isotopic uranium by alpha spectrometry and for Co-60 by gamma spectrometry. The site-specific distribution coefficient for each isotope was estimated as the ratio of extractable radionuclide activity in the solid phase to the activity in the contact solution following a 19-day equilibration. The uranium activity measurements indicate that uranium-234 (U-234) and uranium-238 (U-238) were in secular equilibrium in two soil samples and that soil and sediment samples collected from other sampling locations had higher U-234 activity than U-238 activity in both the solid and solution phases. The site-specific distribution coefficient (Kd) ranged from 82 to 44,600 mL/g for U-238 and from 102 to 65,900 mL/g for U-234. Calculation of U-235 enrichment by mass indicated that four soil samples had values greater than 0.20; these values were 0.37, 0.38, 0.46, and 0.68. Cobalt-60 activity was detected in only three sediment samples. The measured Co-60 activity in the solid phase ranged from 0.15 to 0.45 pCi/g and that in the water phase of all three samples combined was 4 pCi/L. The Kd value for Co-60 in the site brook sediment was calculated to be 70 mL/g.

Wang, Y.; Orlandini, K.A.; Yu, C.

1996-05-01T23:59:59.000Z

471

Improved Results for the H-2(d, n)(3) He Transverse Vector Polarization- Transfer Coefficient K-y(y)' (0 degrees) at Low Energies  

Science Conference Proceedings (OSTI)

Measurements of the H-2(d, n)(3) He transverse vector polarization-transfer coefficient K-y(y)' at 0 degrees. are reported for 29 outgoing neutron energies between 3.94 and 8.47MeV. Our new results determine K-y(y)' (0 degrees) more accurately than previous data, especially for neutron energies below 5MeV. Low-energy data for this reaction are important both as a high-intensity source of highly polarized neutrons for nuclear physics studies with polarized neutron beams, and as a test of the emerging theoretical descriptions of the four-body system, where recently substantial progress has been made.

Roper, C. D. [Duke University/TUNL; Clegg, T. [Triangle Universities Nuclear Laboratory, Durham, NC; Dunham, J. D. [Duke University/TUNL; Mendez, II, Anthony J [ORNL; Tornow, W. [Duke University/TUNL; Walter, R. L. [Duke University/TUNL

2010-01-01T23:59:59.000Z

472

Measurement of the hydrogen recombination coefficient in the TEXT tokamak as a function of outgassing and power radiated during tokamak discharges  

DOE Green Energy (OSTI)

The global recombination rate coefficient k/sub r/ for hydrogen has been measured in the TEXT tokamak vacuum vessel for various surface conditions. An attempt was made to correlate the measured values of k/sub r/ with residual gas analyzer (RGA) data taken before each measurement of k/sub r/ and with the power radiated during tokamak discharges produced after each measurement of k/sub r/. The results show that k/sub r/ increases during a series of tokamak discharges, k/sub r/ is relatively insensitive to power radiated during tokamak discharges, and k/sub r/ increases with the RGA measurements of mass 28 and 40 but not with those of mass 18. In addition, it was found that the mass 18 (H/sub 2/O) signal decreases as glow discharge experiments with hydrogen were performed.

Langley, R.A.; Rowan, W.L.; Bravenec, R.V.; Nelin, K.

1986-10-01T23:59:59.000Z

473

Measurement of the hydrogen recombination coefficient in the TEXT tokamak as a function of outgassing and power radiated during tokamak discharges  

DOE Green Energy (OSTI)

The global recombination rate coefficient k/sub r/ for hydrogen has been measured in the TEXT tokamak vacuum for various surface conditions. An attempt was made to correlate the measured values of k/sub r/ with RGA data taken prior to each k/sub r/ measurement and with the power radiated during tokamak discharges produced after each k/sub r/ measurement. The results show that: k/sub r/ increases during a series of tokamak discharges, k/sub r/ is relatively insensitive to power radiated during tokamak discharges, k/sub r/ increases with the RGA measurements of mass 28 and 40 but not with mass 18. In addition, it was found that the RGA mass 18 (H/sub 2/O) signal decreased as glow discharge experiments with hydrogen were performed.

Langley, R.A.; Rowan, W.L.; Bravinec, R.V.; Nelin, K.

1986-01-01T23:59:59.000Z

474

Identification of Convection Heat Transfer Coefficient of Secondary Cooling Zone of CCM based on Least Squares Method and Stochastic Approximation Method  

E-Print Network (OSTI)

The detailed mathematical model of heat and mass transfer of steel ingot of curvilinear continuous casting machine is proposed. The process of heat and mass transfer is described by nonlinear partial differential equations of parabolic type. Position of phase boundary is determined by Stefan conditions. The temperature of cooling water in mould channel is described by a special balance equation. Boundary conditions of secondary cooling zone include radiant and convective components of heat exchange and account for the complex mechanism of heat-conducting due to airmist cooling using compressed air and water. Convective heat-transfer coefficient of secondary cooling zone is unknown and considered as distributed parameter. To solve this problem the algorithm of initial adjustment of parameter and the algorithm of operative adjustment are developed.

Ivanova, Anna

2010-01-01T23:59:59.000Z