Powered by Deep Web Technologies
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.


1

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...

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

2002-01-01T23:59:59.000Z

2

Gaining a World View  

E-Print Network [OSTI]

tx H 2 O | pg. 26 --------------------------------------------- ???????????????????????? W hen Brandon Hartley traveled to Belgium last summer, he gained a first-hand appreciation for international soil and water issues. Hartley, a Texas A...

Wythe, Kathy

2007-01-01T23:59:59.000Z

3

E-Print Network 3.0 - avalanche gain feasibility Sample Search...  

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

employed. 3.2.2 Gain of an avalanche photodiode. If we denote the electron ionisation... coefficient by h and the width of the depletion layer by w then the ... Source: University...

4

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

5

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

6

su(3)k fusion coefficients  

E-Print Network [OSTI]

A closed and explicit formula for all $\\su{(3)}_k$ fusion coefficients is presented which, in the limit $k \\rightarrow \\infty$, turns into a simple and compact expression for the $su(3)$ tensor product coefficients. The derivation is based on a new diagrammatic method which gives directly both tensor product and fusion coefficients.

L. Begin; P. Mathieu; M. A. Walton

1992-06-08T23:59:59.000Z

7

A near infrared organic photodiode with gain at low bias voltage  

SciTech Connect (OSTI)

We demonstrate an organic photodiode with near infrared optical response out to about 1100 run with a gain of {approx}10 at 1000 run under 5V reverse bias. The diodes employ a soluble naphthalocyanine with a peak absorption coefficient of {approx}10{sup 5} cm{sup -1} at 1000 nm. In contrast to most organic photodiodes, no exciton dissociating material is used. At zero bias, the diodes are inefficient with an external quantum efficiency of {approx} 10{sup -2}. In reverse bias, large gain occurs and is linear with bias voltage above 4V. The observed gain is consistent with a photoconductive gain mechanism.

Campbell, Ian H [Los Alamos National Laboratory; Crone, Brian K [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

8

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

E-Print Network [OSTI]

Technologies Program Energy and Environment Division Ernest Orlando Lawrence Berkeley National Laboratory Division Ernest Orlando Lawrence Berkeley National Laboratory Berkeley, CA 94792 ABSTRACT Measured account of * Present address: Energy Analysis Program, Ernest Orlando Lawrence Berkeley National

9

Seebeck coefficient in organic semiconductors  

E-Print Network [OSTI]

Seebeck coefficient in organic semiconductors A dissertation submitted for the degree of Doctor of Philosophy Deepak Venkateshvaran Fitzwilliam College & Optoelectronics Group, Cavendish Laboratory University of Cambridge February 2014 “The end...

Venkateshvaran, Deepak

2014-07-01T23:59:59.000Z

10

The Kauffman Constraint Coefficients Kw  

E-Print Network [OSTI]

The Kauffman Constraint Coefficients Kw and their corresponding Elementals Ew are presented as solutions to the construction of the (beta)-derivative of Kauffman's Theta-function. Additionally, a new recursion relation is provided to construct the (beta)-derivative of Theta that requires only operational substitutions and summations; this algorithmically simplifies Kauffman's original technique. To demonstrate Kw, we generate the 30 Kw Coefficients from the corresponding Elementals Ew for the (9)-derivative of Theta and find that our results are in complete agreement with Kauffman's Mathematica\\texttrademark solutions. We further present a calculation of two coefficients for the (12)-derivative of Theta and invite readers to use Mathematica\\texttrademark or any other means to calculate and verify our results. Finally, we present a challenging calculation for a coefficient of the (40)-derivative of Theta; owing to the vast numbers of permutations involved, a Mathematica\\texttrademark approach may require substantial computer resources to obtain the solution in a reasonable time.

Kenneth A. Griggs

2011-10-27T23:59:59.000Z

11

Fuel Temperature Coefficient of Reactivity  

SciTech Connect (OSTI)

A method for measuring the fuel temperature coefficient of reactivity in a heterogeneous nuclear reactor is presented. The method, which is used during normal operation, requires that calibrated control rods be oscillated in a special way at a high reactor power level. The value of the fuel temperature coefficient of reactivity is found from the measured flux responses to these oscillations. Application of the method in a Savannah River reactor charged with natural uranium is discussed.

Loewe, W.E.

2001-07-31T23:59:59.000Z

12

The Production Coefficients of Feeds  

E-Print Network [OSTI]

TEXAS AGRICULTURAL EXPERIMENT STATION BULLETIN NO. 185 FEBRUARY, 1916 DIVISION OF CHEMISTRY The Production Coefficients of Feeds POSTOFFICE: COLLEGE STATION, BRAZOS COUNTY, TEXAS [Blank Page in Original Bulletin] TEXAS AGRICULTURAL EXPERIMENT... STATION pp - -- - - BULLETIN NO. 185 FEBRUARY, 1916 DIVISION OF CHEMISTRY The Production Coefficients of Feeds G. S. FRAPS, Ph. D. CHEMIST IN CHARGE; STATE CHEMIST POSTOFFICE: COLLEGE STATION, BRAZOS COUNTY, TEXAS AUSTIN, TEXAS VON BOECKMANN...

Fraps, G. S. (George Stronach)

1916-01-01T23:59:59.000Z

13

Determination of optimal gains for constrained controllers  

SciTech Connect (OSTI)

In this report, we consider the determination of optimal gains, with respect to a certain performance index, for state feedback controllers where some elements in the gain matrix are constrained to be zero. Two iterative schemes for systematically finding the constrained gain matrix are presented. An example is included to demonstrate the procedures.

Kwan, C.M.; Mestha, L.K.

1993-08-01T23:59:59.000Z

14

Portable vapor diffusion coefficient meter  

DOE Patents [OSTI]

An apparatus for measuring the effective vapor diffusion coefficient of a test vapor diffusing through a sample of porous media contained within a test chamber. A chemical sensor measures the time-varying concentration of vapor that has diffused a known distance through the porous media. A data processor contained within the apparatus compares the measured sensor data with analytical predictions of the response curve based on the transient diffusion equation using Fick's Law, iterating on the choice of an effective vapor diffusion coefficient until the difference between the predicted and measured curves is minimized. Optionally, a purge fluid can forced through the porous media, permitting the apparatus to also measure a gas-phase permeability. The apparatus can be made lightweight, self-powered, and portable for use in the field.

Ho, Clifford K. (Albuquerque, NM)

2007-06-12T23:59:59.000Z

15

High temperature Seebeck coefficient metrology  

SciTech Connect (OSTI)

We present an overview of the challenges and practices of thermoelectric metrology on bulk materials at high temperature (300 to 1300 K). The Seebeck coefficient, when combined with thermal and electrical conductivity, is an essential property measurement for evaluating the potential performance of novel thermoelectric materials. However, there is some question as to which measurement technique(s) provides the most accurate determination of the Seebeck coefficient at high temperature. This has led to the implementation of nonideal practices that have further complicated the confirmation of reported high ZT materials. To ensure meaningful interlaboratory comparison of data, thermoelectric measurements must be reliable, accurate, and consistent. This article will summarize and compare the relevant measurement techniques and apparatus designs required to effectively manage uncertainty, while also providing a reference resource of previous advances in high temperature thermoelectric metrology.

Martin, J. [Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Tritt, T. [Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States); Uher, C. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2010-12-15T23:59:59.000Z

16

High temperature Seebeck coefficient metrology  

SciTech Connect (OSTI)

We present an overview of the challenges and practices of thermoelectric metrology on bulk materials at high temperature (300 to 1300 K). The Seebeck coefficient, when combined with thermal and electrical conductivity, is an essential propertymeasurement for evaluating the potential performance of novel thermoelectricmaterials. However, there is some question as to which measurement technique(s) provides the most accurate determination of the Seebeck coefficient at high temperature. This has led to the implementation of nonideal practices that have further complicated the confirmation of reported high ZT materials. To ensure meaningful interlaboratory comparison of data, thermoelectricmeasurements must be reliable, accurate, and consistent. This article will summarize and compare the relevant measurement techniques and apparatus designs required to effectively manage uncertainty, while also providing a reference resource of previous advances in high temperature thermoelectric metrology.

Martin, J.; Tritt, T.; Uher, Ctirad

2010-01-01T23:59:59.000Z

17

Calculate thermal-expansion coefficients  

SciTech Connect (OSTI)

To properly design and use process equipment, an engineer needs a sound knowledge of physical and thermodynamic property data. A lack of such knowledge can lead to design or operating mistakes that can be dangerous, costly or even fatal. One useful type of property data is the thermal-expansion coefficient. This article presents equations and tables to find the thermal-expansion coefficients of many liquids that contain carbon. These data are useful in process-engineering applications, including the design of relief systems which are crucial to safeguarding process equipment. Data are provided for approximately 350 compounds. A computer software program, which contains the thermophysical property data for all of the compounds discussed in this article, is available for $43 prepaid from the author (Carl L. Yaws, Box 10053, Lamar University, beaumont, TX 77710; Tel. 409-880-8787; fax 409-880-8404). The program is in ASCII format, which can be accessed by most other types of computer software.

Yaws, C.L. [Lamar Univ., Beaumont, TX (United States)

1995-08-01T23:59:59.000Z

18

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 ...

Hamish Waterer

2006-04-27T23:59:59.000Z

19

Measurements of thermal accommodation coefficients.  

SciTech Connect (OSTI)

A previously-developed experimental facility has been used to determine gas-surface thermal accommodation coefficients from the pressure dependence of the heat flux between parallel plates of similar material but different surface finish. Heat flux between the plates is inferred from measurements of temperature drop between the plate surface and an adjacent temperature-controlled water bath. Thermal accommodation measurements were determined from the pressure dependence of the heat flux for a fixed plate separation. Measurements of argon and nitrogen in contact with standard machined (lathed) or polished 304 stainless steel plates are indistinguishable within experimental uncertainty. Thus, the accommodation coefficient of 304 stainless steel with nitrogen and argon is estimated to be 0.80 {+-} 0.02 and 0.87 {+-} 0.02, respectively, independent of the surface roughness within the range likely to be encountered in engineering practice. Measurements of the accommodation of helium showed a slight variation with 304 stainless steel surface roughness: 0.36 {+-} 0.02 for a standard machine finish and 0.40 {+-} 0.02 for a polished finish. Planned tests with carbon-nanotube-coated plates will be performed when 304 stainless-steel blanks have been successfully coated.

Rader, Daniel John; Castaneda, Jaime N.; Torczynski, John Robert; Grasser, Thomas W.; Trott, Wayne Merle

2005-10-01T23:59:59.000Z

20

Experimental Determination of the Gain Distribution of an Avalanche Photodiode at Low Gains  

E-Print Network [OSTI]

A measurement system for determining the gain distributions of avalanche photodiodes (APDs) in a low gain range is presented. The system is based on an ultralow-noise charge--sensitive amplifier and detects the output carriers from an APD. The noise of the charge--sensitive amplifier is as low as 4.2 electrons at a sampling rate of 200 Hz. The gain distribution of a commercial Si APD with low average gains are presented, demonstrating the McIntyre theory in the low gain range.

Kenji Tsujino; Makoto Akiba; Masahide Sasaki

2008-12-04T23:59:59.000Z

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.


21

Gaines County Solid Waste Management Act (Texas)  

Broader source: Energy.gov [DOE]

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...

22

Method and system for edge cladding of laser gain media  

DOE Patents [OSTI]

A gain medium operable to amplify light at a gain wavelength and having reduced transverse ASE includes an input surface and an output surface opposing the input surface. The gain medium also includes a central region including gain material and extending between the input surface and the output surface along a longitudinal optical axis of the gain medium. The gain medium further includes an edge cladding region surrounding the central region and extending between the input surface and the output surface along the longitudinal optical axis of the gain medium. The edge cladding region includes the gain material and a dopant operable to absorb light at the gain wavelength.

Bayramian, Andrew James; Caird, John Allyn; Schaffers, Kathleen Irene

2014-03-25T23:59:59.000Z

23

Energy Gaining Windows for Residential Buildings Jesper Kragh, Assistant Professor,  

E-Print Network [OSTI]

season. It is assumed that in northern cold climates all of the solar gain during the heating season can profiles, solar gain, net energy gain, low energy houses SUMMARY: This paper presents some of the research buildings. The net energy gain of windows is the solar gain minus the heat loss integrated over the heating

24

Capital gains tax treatment and the cattleman  

E-Print Network [OSTI]

Major Subject: Agricultural Economics CAPITAL GAINS TAX TREATMENT AND THE CATTLEMAN A Thesis by M I LTDN EDWARD R I STE R Approved as to style and content by: airman o ommi e Dr. Ronald R. Kay Head o D artment Dr. John opkin Mem er Dr. Donald... R. Levi e er Dr. Howard Hesby December 1976 ABSTRACT Capital Gains Tax Treatment and the Catt leman. (December 1976) Milton Edward Rister, B. S. , Texas ASM University Chairman of Advisory Committee: Or. Ronald D. Kay The federal tax...

Rister, M. Edward

1976-01-01T23:59:59.000Z

25

Gainful Employment Programs Guidance January 2012  

E-Print Network [OSTI]

with the following information on our GE programs: · Name and Classification of Instructional Program (CIP) code1 Gainful Employment Programs Guidance January 2012 Eric R. Pedersen, Associate Vice Chancellor Background On October 29, 2010, and June 13, 2011, the Department of Education (ED) published final

Pantaleone, Jim

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

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are myriad ways to build experience Sciences at Columbia University offers on-campus research opportunities for the summer term Dec. 13 - March careereducation.columbia.edu Join LionSHARE ­ CCE's internship/job board Double Discovery Center Volunteer

Shepard, Kenneth

28

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are so many ways to build experience The Columbia University Office of Government and Community Affairs provides assistance to undergraduates.edu/academics/research/science Summer Undergraduate Research Fellowship The Department of Biological Sciences at Columbia University

Hone, James

29

Columbia University Opportunities to Gain Experience  

E-Print Network [OSTI]

Columbia University Opportunities to Gain Experience There are so many ways to build experience Program The Columbia University Office of Government and Community Affairs provides assistance.edu/academics/research/science Summer Undergraduate Research Fellowship The Department of Biological Sciences at Columbia University

Hone, James

30

APPENDIX H Partition Coefficients For Strontium  

E-Print Network [OSTI]

APPENDIX H Partition Coefficients For Strontium #12;Appendix H Partition Coefficients For Strontium H.1.0 Background Two simplifying assumptions underlying the selection of strontium Kd values included in the look-up table were made. These assumptions are that the adsorption of strontium adsorption

31

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

32

Friction Coefficient for Quarks in Supergravity Duals  

E-Print Network [OSTI]

We study quarks moving in strongly-coupled plasmas that have supergravity duals. We compute the friction coefficient of strings dual to such quarks for general static supergravity backgrounds near the horizon. Our results also show that a previous conjecture on the bound has to be modified and higher friction coefficients can be achieved.

E. Antonyan

2006-11-22T23:59:59.000Z

33

APPENDIX I Partition Coefficients For Thorium  

E-Print Network [OSTI]

APPENDIX I Partition Coefficients For Thorium #12;Appendix I Partition Coefficients For Thorium of thorium Kd values for the look-up table. These assumptions were based on the findings of the literature review conducted on the geochemical processes affecting thorium sorption. The assumptions are as follows

34

Absorption Coefficients and Impedance Daniel A. Russell  

E-Print Network [OSTI]

1 Absorption Coefficients and Impedance Daniel A. Russell Science and Mathematics Department will measure the absorption coefficients and acoustic impedance of samples of acoustic absorbing materials material is responsible for almost 50% of sound absorption inside an automobile). The reverberation time

Russell, Daniel A.

35

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

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

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...

36

Roof Coating Procedures and Their Productivity Gains  

E-Print Network [OSTI]

benefit of the installation of different roof coating technologies and comparable application procedures of these technologies are ambiguous. The focal point of this research is to determine the effective correlation between various commercially... available roof coatings, and productivity gains associated with these energy saving strategies. This type of situation is evidenced in the justification of energy rebates distributed by Florida Power & Light in exchange for the application of Energy Star...

Bonaby, J.; Schaub, D.

2006-01-01T23:59:59.000Z

37

Gaines, Michigan: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation, search Equivalent URIFrontier,JumpGahanna, Ohio: EnergyGaines, Michigan:

38

GainSpan Corporation | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Power Basics (TheEtelligenceGainSpan Corporation Jump to: navigation, search

39

Transport coefficients of a unitarized pion gas  

E-Print Network [OSTI]

The latest experimental results in relativistic heavy-ion collisions show that the matter there produced requires transport coefficients because of the important collective properties found. We review the theoretical calculation of these transport coefficients in the hadron side at low temperatures by computing them in a gas composed of low energy pions. The interaction of these pions is taken from an effective chiral theory and further requiring scattering unitarity. The propagation of D and D* mesons in the thermalized pion gas is also studied in order to extract the heavy quark diffusion coefficients in the system.

Juan M. Torres-Rincon

2011-11-16T23:59:59.000Z

40

Survey of Gain-Scheduling Analysis & Design WE.Leithead  

E-Print Network [OSTI]

ranging from aerospace to process control. Despite the wide application of gain-scheduling controllers of gain-scheduling controllers and a diverse academic literature relating to gain- scheduling extendingSurvey of Gain-Scheduling Analysis & Design D.J.Leith WE.Leithead Department of Electronic

Duffy, Ken

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

Effects of Gain Changes on RPM Performance  

SciTech Connect (OSTI)

The mission of the U.S. Department of Energy/National Nuclear Security Administration's (DOE/NNSA's) Office of the Second Line of Defense (SLD) is to strengthen the capability of foreign governments to deter, detect, and interdict the illicit trafficking of special nuclear and other radioactive materials across international borders and through the global maritime shipping system. The goal of this mission is to reduce the probability of these materials being fashioned into a weapon of mass destruction or radiological dispersal device that could be used against the United States or its international partners. This goal is achieved primarily through the installation and operation of radiation detection equipment at border crossings, airports, seaports, and other strategic locations around the world. In order to effectively detect the movement of radioactive material, the response of these radiation detectors to various materials in various configurations must be well characterized. Oak Ridge National Laboratory (ORNL) investigated two aspects of Radiation Portal Monitor (RPM) settings, based on a preliminary investigation done by the Los Alamos National Laboratory (LANL): source-to-detector distance effect on amplifier gain and optimized discriminator settings. This report discusses this investigation. A number of conclusions can be drawn from the ORNL testing. First, for increased distance between the source and the detector, thus illuminating the entire detector rather than just the center of the detector (as is done during detector alignments), an increase in gain may provide a 5-15% increase in sensitivity (Fig. 4). However, increasing the gain without adjusting the discriminator settings is not recommended as this makes the monitor more sensitive to electronic noise and temperature-induced fluctuations. Furthermore, if the discriminators are adjusted in relation to the increase in gain, thus appropriately discriminating against electronic noise, the sensitivity gains are less than 5% (Fig. 6). ORNL does not consider this slight increase in sensitivity to be a worthwhile pursuit. Second, increasing the ULD will increase sensitivity a few percent (Fig. 7); however, it is not clear that the slight increase in sensitivity is worth the effort required to make the change (e.g., reliability, cost, etc.). Additionally, while the monitor would be more sensitive to HEU, it would also be more sensitive to NORM. Third, the sensitivity of the system remains approximately the same whether it is calibrated to a small source on contact or a large source far away (Fig. 6). This affirms that no changes to the existing calibration procedure are necessary.

Lousteau, Angela L [ORNL; York, Robbie Lynn [ORNL; Livesay, Jake [ORNL

2012-03-01T23:59:59.000Z

42

Creating materials with a desired refraction coefficient  

E-Print Network [OSTI]

A method is given for creating material with a desired refraction coefficient. The method consists of embedding into a material with known refraction coefficient many small particles of size $a$. The number of particles per unit volume around any point is prescribed, the distance between neighboring particles is $O(a^{\\frac{2-\\kappa}{3}})$ as $a\\to 0$, $0<\\kappa<1$ is a fixed parameter. The total number of the embedded particle is $O(a^{\\kappa-2})$. The physical properties of the particles are described by the boundary impedance $\\zeta_m$ of the $m-th$ particle, $\\zeta_m=O(a^{-\\kappa})$ as $a\\to 0$. The refraction coefficient is the coefficient $n^2(x)$ in the wave equation $[\

A. G. Ramm

2009-09-02T23:59:59.000Z

43

Symmetries and Interaction coefficients of Kelvin waves  

E-Print Network [OSTI]

We considered symmetry restriction on the interaction coefficients of Kelvin waves and demonstrated that linear in small wave vector asymptotic is not forbidden, as one can expect by naive reasoning.

Vladimir V. Lebedev; Victor S. L'vov

2010-05-25T23:59:59.000Z

44

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.

Fábio L. Braghin

2003-12-16T23:59:59.000Z

45

Gaining Energy Perspective | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdf Flash2006-53.pdf0.pdfCost SavingsEnergy GETEMGolden FieldGaining Energy

46

Gaining creative control over semiconductor nanowires  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Big Sky Learning Fun with Big SkyDIII-DRMR LSU/CAMD|Gaining creative

47

Women @ Energy: Linda Gaines | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of Dept.| WEATHERIZATION5Iski WomenKerstinGaines Women @ Energy:

48

Computation of Clebsch-Gordan and Gaunt coefficients using binomial coefficients  

SciTech Connect (OSTI)

Using binomial coefficients the Clebsch-Gordan and Gaunt coefficients were calculated for extremely large quantum numbers. The main advantage of this approach is directly calculating these coefficients, instead of using recursion relations. Accuracy of the results is quite high for quantum numbers l{sub 1}, and l{sub 2} up to 100. Despite direct calculation, the CPU times are found comparable with those given in the related literature. 11 refs., 1 fig., 2 tabs.

Guseinov, I.I.; Oezmen, A.; Atav, Ue [Selcuk Univ., Kampus, Konya (Turkey)] [and others] [Selcuk Univ., Kampus, Konya (Turkey); and others

1995-12-01T23:59:59.000Z

49

Fractal diffusion coefficient from dynamical zeta functions  

E-Print Network [OSTI]

Dynamical zeta functions provide a powerful method to analyze low dimensional dynamical systems when the underlying symbolic dynamics is under control. On the other hand even simple one dimensional maps can show an intricate structure of the grammar rules that may lead to a non smooth dependence of global observable on parameters changes. A paradigmatic example is the fractal diffusion coefficient arising in a simple piecewise linear one dimensional map of the real line. Using the Baladi-Ruelle generalization of the Milnor-Thurnston kneading determinant we provide the exact dynamical zeta function for such a map and compute the diffusion coefficient from its smallest zero.

G. Cristadoro

2005-09-28T23:59:59.000Z

50

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...

Chang, Young Joon

2011-08-08T23:59:59.000Z

51

Effects of internal gain assumptions in building energy calculations  

SciTech Connect (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

52

TRADE COSTS AND THE GAINS FROM TRADE IN CROP AGRICULTURE  

E-Print Network [OSTI]

costs, trade liberalization. JEL codes: F18, Q17, Q54. Although the theoretical case for the gains from

Tullos, Desiree

53

Design of Gain-Scheduled Strictly Positive Real Controllers  

E-Print Network [OSTI]

Design of Gain-Scheduled Strictly Positive Real Controllers Using Numerical Optimization the linear SPR controllers, which compose the gain-scheduled controller. Second, we formulate the optimization problem associ- ated with the gain-scheduled controller itself. Restricting our in- vestigation

Damaren, Christopher J.

54

Electric top drives gain wide industry acceptance  

SciTech Connect (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

55

Gain properties of dye-doped polymer thin films  

E-Print Network [OSTI]

The demonstration of an electrically pumped organic laser remains a major issue of organic optoelectronics for several decades. Nowadays, hybrid pumping seems a promising compromise where the organic material is optically pumped by an electrically pumped inorganic device on chip. This technical solution requires therefore an optimization of the organic gain medium under optical pumping. Here, we report a detailed study of gain features of dye-doped polymer thin films, in particular we introduce the gain efficiency $K$, in order to facilitate comparison between material and experimental conditions. First, we measure the bulk gain by the means of a pump-probe setup, and then present in details several factors which modify the actual gain of the layer, namely the confinement factor, the pump polarization, the molecular anisotropy, and the re-absorption. The usual model to evaluate the gain leads to an overestimation by more than one order of magnitude, which stresses the importance to design the devices accordin...

Gozhyk, I; Rabbani, H; Djellali, N; Forget, S; Chenais, S; Ulysse, C; Brosseau, A; Gauvin, S; Zyss, J; Lebental, M

2014-01-01T23:59:59.000Z

56

Use of a photonic crystal for optical amplifier gain control  

DOE Patents [OSTI]

An optical amplifier having a uniform gain profile uses a photonic crystal to tune the density-of-states of a gain medium so as to modify the light emission rate between atomic states. The density-of-states of the gain medium is tuned by selecting the size, shape, dielectric constant, and spacing of a plurality of microcavity defects in the photonic crystal. The optical amplifier is particularly useful for the regeneration of DWDM signals in long optical fibers.

Lin, Shawn-Yu (Albuquerque, NM); Fleming, James G. (Albuquerque, NM); El-Kady, Ihab (Albuquerque, NM)

2006-07-18T23:59:59.000Z

57

ORISE: CDC Travelers' Health Mobile App, Designed by ORISE, Gains...  

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

Can I Eat This? Mobile App Helps International Travelers Make Safe Dining Choices CDC Travelers' Health app, designed by ORISE, gains attention on multiple websites How ORISE is...

58

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

59

Outside heat transfer coefficients for atmospheric coolers  

E-Print Network [OSTI]

for the same conditions of operation is given by Robinson ()i. 9). TABLE I Comparison of various authors' values of outside heat transfer coefficients Btugour x square foot x F ~ ) Adams (1 ) 1001 1041 915 74, 6 1021 981 910 Clarke 945 997 841... ozeventing any recycling of the wet air. "M~4~ 1 f jc, : 1 C. X L, w 38 Cooled water fro~ the tower is centrifugally pmnoed through a 2 inch pipe to a rotameter and a I and operated control valve, Figure 8, before entering a 1 1/g inch by 5 foot...

George, David Mark

1950-01-01T23:59:59.000Z

60

THE CORRELATION COEFFICIENTS A generalized method of defining and interpreting correlation coefficients is given. Seven  

E-Print Network [OSTI]

on the ranks of the data. A quick calculation of the rank based correlation coefficients using a 0-1 "graph effect so that they will tend to be small and the net effect is that the covariance will be large. One and the covariance will fluctuate around zero. When there is negative correlation the "distance" from positive

Gideon, Rudy A.

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

Review of health and productivity gains from better IEQ  

SciTech Connect (OSTI)

The available scientific data suggest that existing technologies and procedures can improve indoor environmental quality (IEQ) in a manner that significantly increases productivity and health. While there is considerable uncertainty in the estimates of the magnitudes of productivity gains that may be obtained, the projected gains are very large. For the U.S., the estimated potential annual savings and productivity gains are $6 to $14 billion from reduced respiratory disease, $2 to $4 billion from reduced allergies and asthma, $10 to $30 billion from reduced sick building syndrome symptoms, and $20 to $160 billion from direct improvements in worker performance that are unrelated to health. Productivity gains that are quantified and demonstrated could serve as a strong stimulus for energy efficiency measures that simultaneously improve the indoor environment.

Fisk, William J.

2000-08-01T23:59:59.000Z

62

Gain scheduling for geometrically nonlinear flexible space structures  

E-Print Network [OSTI]

A gain-scheduling approach for the control of geometrically nonlinear structures is developed. The objective is to improve performance over current linear design techniques that are applied to the same control problem. The ...

Yung, Jeremy Hoyt, 1971-

2002-01-01T23:59:59.000Z

63

Optical Filter Design: Gain Analysis and Tolerance Analysis  

E-Print Network [OSTI]

OPTICAL FILTER DESIGN: GAIN ANALYSIS AND TOLERANCE ANALYSIS A Thesis by VIVEK VANDRASI Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE August... 2010 Major Subject: Electrical Engineering OPTICAL FILTER DESIGN: GAIN ANALYSIS AND TOLERANCE ANALYSIS A Thesis by VIVEK VANDRASI Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements...

Vandrasi, Vivek

2011-10-21T23:59:59.000Z

64

additional net gain: Topics by E-print Network  

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

of contaminants discharged dispersion coefficient to be 70.1 ( 4.3 m2 s-1. Temporal evolution of the SF6 inventory indicates an average Ho, David 369 Building Bayes Nets with...

65

Can fusion coefficients be calculated from the depth rule ?  

E-Print Network [OSTI]

The depth rule is a level truncation of tensor product coefficients expected to be sufficient for the evaluation of fusion coefficients. We reformulate the depth rule in a precise way, and show how, in principle, it can be used to calculate fusion coefficients. However, we argue that the computation of the depth itself, in terms of which the constraints on tensor product coefficients is formulated, is problematic. Indeed, the elements of the basis of states convenient for calculating tensor product coefficients do not have a well-defined depth! We proceed by showing how one can calculate the depth in an `approximate' way and derive accurate lower bounds for the minimum level at which a coupling appears. It turns out that this method yields exact results for $\\widehat{su}(3)$ and constitutes an efficient and simple algorithm for computing $\\widehat{su}(3)$ fusion coefficients.

A. N. Kirillov; P. Mathieu; D. Senechal; M. Walton

1992-09-28T23:59:59.000Z

66

Construction of operator product expansion coefficients via consistency conditions  

E-Print Network [OSTI]

In this thesis an iterative scheme for the construction of operator product expansion (OPE) coefficients is applied to determine low order coefficients in perturbation theory for a specific toy model. We use the approach to quantum field theory proposed by S. Hollands [arXiv:0802.2198], which is centered around the OPE and a number of axioms on the corresponding OPE coefficients. This framework is reviewed in the first part of the thesis. In the second part we apply an algorithm for the perturbative construction of OPE coefficients to a toy model: Euclidean $\\varphi^6$-theory in 3-dimensions. Using a recently found formulation in terms of vertex operators and a diagrammatic notation in terms of trees [arXiv:0906.5313v1], coefficients up to second order are constructed, some general features of coefficients at arbitrary order are presented and an exemplary comparison to the corresponding customary method of computation is given.

Jan Holland

2009-06-30T23:59:59.000Z

67

accurate rate coefficients: Topics by E-print Network  

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

constant and the diffusion coefficient from molecular dynamics simulations: the case of SPCE water Condensed Matter (arXiv) Summary: The effect of the applied trajectory length...

68

Diffusion coefficient of three-dimensional Yukawa liquids  

SciTech Connect (OSTI)

The purpose of this work is an investigation of the diffusion coefficient of the dust component in complex plasma. The computer simulation of the Yukawa liquids was made on the basis of the Langevin equation, which takes into account the influence of buffer plasma on the dust particles dynamics. The Green–Kubo relation was used to calculate the diffusion coefficient. Calculations of the diffusion coefficient for a wide range of the system parameters were performed. Using obtained numerical data, we constructed the interpolation formula for the diffusion coefficient. We also show that the interpolation formula correctly describes experimental data obtained under microgravity conditions.

Dzhumagulova, K. N.; Ramazanov, T. S.; Masheeva, R. U. [IETP, Al Farabi Kazakh National University, 71, al Farabi ave., Almaty 050040 (Kazakhstan)] [IETP, Al Farabi Kazakh National University, 71, al Farabi ave., Almaty 050040 (Kazakhstan)

2013-11-15T23:59:59.000Z

69

ar diffusion coefficient: Topics by E-print Network  

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

diffusion is examined. Kazuhiko Seki; Saurabh Mogre; Shigeyuki Komura 2014-02-05 4 Fractal diffusion coefficient from dynamical zeta functions Nonlinear Sciences (arXiv)...

70

axial diffusion coefficient: Topics by E-print Network  

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

diffusion is examined. Kazuhiko Seki; Saurabh Mogre; Shigeyuki Komura 2014-02-05 5 Fractal diffusion coefficient from dynamical zeta functions Nonlinear Sciences (arXiv)...

71

Investigation of gain kinetics in a CO gas dynamic laser  

SciTech Connect (OSTI)

A detailed experimental investigation of small-signal gain in a CO gasdynamic laser, produced in a shock tunnel is presented. Gains of the P/sub 7/(3) transition were measured at a distance 44 cm downstream from the nozzle throat for various CO--Ar and CO--N/sub 2/--Ar mixtures at stagnation temperatures of 1800/sup 0/--3800 /sup 0/K and stagnation pressures of 18--40 atm. Optimum gas temperatures and compositions were observed. Laser oscillations were observed simultaneously in two cavities located at 44 and 56 cm downstream from the nozzle throat. The experimental data on gain have been compared with a numerical model. A quantitatively good argeement between calculations and experiments was found which permits the utilization of the mathematical model for a better understanding of the processes involved in the laser operation. Small signal gains and multi-line laser power outputs were calculated along the nozzle for various initial conditions. Calculations indicate that maximum gain and maximum power occur for P/sub 3/(4)-P/sub 5/(4) lines at a stagnation temperature of about 3000 /sup 0/K and a gas composition of CO:Ar = 20:80.

Stricker, J.; Tilleman, M.

1982-06-01T23:59:59.000Z

72

Information Gain Based Dimensionality Selection for Classifying Text Documents  

SciTech Connect (OSTI)

Selecting the optimal dimensions for various knowledge extraction applications is an essential component of data mining. Dimensionality selection techniques are utilized in classification applications to increase the classification accuracy and reduce the computational complexity. In text classification, where the dimensionality of the dataset is extremely high, dimensionality selection is even more important. This paper presents a novel, genetic algorithm based methodology, for dimensionality selection in text mining applications that utilizes information gain. The presented methodology uses information gain of each dimension to change the mutation probability of chromosomes dynamically. Since the information gain is calculated a priori, the computational complexity is not affected. The presented method was tested on a specific text classification problem and compared with conventional genetic algorithm based dimensionality selection. The results show an improvement of 3% in the true positives and 1.6% in the true negatives over conventional dimensionality selection methods.

Dumidu Wijayasekara; Milos Manic; Miles McQueen

2013-06-01T23:59:59.000Z

73

High-frequency absorption and gain in superlattices: Semiquasistatic approach  

E-Print Network [OSTI]

We consider a generation and an amplification of THz radiation in semiconductor superlattices under the action of microwave pump field. Electrons belonging to a single miniband of the superlattice interact quasistatically with the pump field and dynamically with a signal THz field. Within this semiquasistic approach we derive elegant difference formulas describing absorption (gain) of the weak THz signal. We present an instructive geometric interpretation of the absorption formulas which allows a search of optimum conditions for the gain employing only a simple qualitative analysis. Our theoretical findings contribute to the development of sources and detectors of THz radiation that are using nonlinear electric properties of semiconductor superlattices.

A. V. Shorokhov; K. N. Alekseev

2006-02-08T23:59:59.000Z

74

Equilibrium interfacial free energies and Turnbull coefficient for bcc crystallizing colloidal charged sphere suspensions  

E-Print Network [OSTI]

We extend previous analysis of data for the melt-nucleus interfacial free energy, $\\gamma$, gained from optical experiments on suspensions of charged colloidal spheres, which crystallize with body centred cubic (bcc) crystal structures. Compiling data from five pure species with different polydispersities and one binary mixture, we find the equilibrium melt-crystal interfacial energy to be considerably larger than the hard sphere reference value. Both this quantity and the entropy of freezing decrease with increasing polydispersity. Moreover, we give a first experimental determination of the Turnbull coefficient for a bcc crystallizing material. The observed value $C_{T, bcc} \\approx 0.3$ agrees well with theoretical expectations for bcc systems with short to medium ranged interactions.

Thomas Palberg; Patrick Wette; Dieter M. Herlach

2014-03-25T23:59:59.000Z

75

FREQUENCY DEPENDENT ULTRASONIC ATTENUATION COEFFICIENT ASSESSMENT IN FRESH  

E-Print Network [OSTI]

dependency of the ultrasonic attenuation coefficient ranges from f * e to fl.3 6 and its magnitude at 1 MHz dependent attenuation coefficient must be described by a higher ordered function than a simple power fit at the Bioacoustics Research Laboratory (2). A system block diagram appears in Figure 1. CHART ATTENUATOR ALU Ml

Illinois at Urbana-Champaign, University of

76

The effective pyroelectric and thermal expansion coefficients of ferroelectric ceramics  

E-Print Network [OSTI]

The effective pyroelectric and thermal expansion coefficients of ferroelectric ceramics JiangYu Li an estimate on the effective pyroelectric and thermal expansion coefficients of fer- roelectric ceramics, and thermal-medical diagnostics (Cross, 1993). A ceramic made of pyroelectric grains does not necessarily

Li, Jiangyu

77

Micro- and macroscale coefficients of friction of cementitious materials  

SciTech Connect (OSTI)

Millions of metric tons of cementitious materials are produced, transported and used in construction each year. The ease or difficulty of handling cementitious materials is greatly influenced by the material friction properties. In the present study, the coefficients of friction of cementitious materials were measured at the microscale and macroscale. The materials tested were commercially-available Portland cement, Class C fly ash, and ground granulated blast furnace slag. At the microscale, the coefficient of friction was determined from the interaction forces between cementitious particles using an Atomic Force Microscope. At the macroscale, the coefficient of friction was determined from stresses on bulk cementitious materials under direct shear. The study indicated that the microscale coefficient of friction ranged from 0.020 to 0.059, and the macroscale coefficient of friction ranged from 0.56 to 0.75. The fly ash studied had the highest microscale coefficient of friction and the lowest macroscale coefficient of friction. -- Highlights: •Microscale (interparticle) coefficient of friction (COF) was determined with AFM. •Macroscale (bulk) COF was measured under direct shear. •Fly ash had the highest microscale COF and the lowest macroscale COF. •Portland cement against GGBFS had the lowest microscale COF. •Portland cement against Portland cement had the highest macroscale COF.

Lomboy, Gilson [Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011 (United States)] [Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011 (United States); Sundararajan, Sriram, E-mail: srirams@iastate.edu [Department of Mechanical Engineering, Iowa State University, Ames, IA 50011 (United States)] [Department of Mechanical Engineering, Iowa State University, Ames, IA 50011 (United States); Wang, Kejin [Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011 (United States)] [Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011 (United States)

2013-12-15T23:59:59.000Z

78

METHODS PAPER Addressing Practical Challenges of Low Friction Coefficient  

E-Print Network [OSTI]

sensitive to the lubrication, environment, and contact conditions, and under nominally constant conditions Tribol Trans ASME 127:673­678, 2005), ``...the measurement of friction coefficient is extremely sensitive, friction coefficients range from about 0.2 to 1 for typical material pairs under standard conditions

Sawyer, Wallace

79

Defining the coupling coefficient for electrodynamic transducers Shuo Chenga)  

E-Print Network [OSTI]

-density permanent magnets4 has enabled more com- pact and powerful electrodynamic transducers.5 More recentlyDefining the coupling coefficient for electrodynamic transducers Shuo Chenga) and David P. Arnold September 2013) This paper provides a simple, practical definition of the coupling coefficient

Allen, Jont

80

Normality of Monte Carlo criticality eigenfunction decomposition coefficients  

SciTech Connect (OSTI)

A proof is presented, which shows that after a single Monte Carlo (MC) neutron transport power method iteration without normalization, the coefficients of an eigenfunction decomposition of the fission source density are normally distributed when using analog or implicit capture MC. Using a Pearson correlation coefficient test, the proof is corroborated by results from a uniform slab reactor problem, and those results also suggest that the coefficients are normally distributed with normalization. The proof and numerical test results support the application of earlier work on the convergence of eigenfunctions under stochastic operators. Knowledge of the Gaussian shape of decomposition coefficients allows researchers to determine an appropriate level of confidence in the distribution of fission sites taken from a MC simulation. This knowledge of the shape of the probability distributions of decomposition coefficients encourages the creation of new predictive convergence diagnostics. (authors)

Toth, B. E.; Martin, W. R. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Boulevard, Ann Arbor, MI 48109 (United States); Griesheimer, D. P. [Bechtel Bettis, Inc., P.O. Box 79, West Mifflin, PA 15122 (United States)

2013-07-01T23:59:59.000Z

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.


81

Is the Gini coefficient a stable measure of galaxy structure?  

E-Print Network [OSTI]

The Gini coefficient, a non-parametric measure of galaxy morphology, has recently taken up an important role in the automated identification of galaxy mergers. I present a critical assessment of its stability, based on a comparison of HST/ACS imaging data from the GOODS and UDF surveys. Below a certain signal-to-noise level, the Gini coefficient depends strongly on the signal-to-noise ratio, and thus becomes useless for distinguishing different galaxy morphologies. Moreover, at all signal-to-noise levels the Gini coefficient shows a strong dependence on the choice of aperture within which it is measured. Consequently, quantitative selection criteria involving the Gini coefficient, such as a selection of merger candidates, cannot always be straightforwardly applied to different datasets. I discuss whether these effects could have affected previous studies that were based on the Gini coefficient, and establish signal-to-noise limits above which measured Gini values can be considered reliable.

Thorsten Lisker

2008-07-09T23:59:59.000Z

82

E-Print Network 3.0 - active life gained Sample Search Results  

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

ues. Inverting Gain As with voltage-feedback op amps, the ratio of the feedback... resistor to the gain-setting resistor determines the voltage gain in current-feedback op amp...

83

Reliability Gain of Network Coding in Lossy Wireless Networks  

E-Print Network [OSTI]

Reliability Gain of Network Coding in Lossy Wireless Networks Majid Ghaderi Department of Computer that network coding improves network reliability by reducing the number of packet retransmissions in lossy networks. However, the extent of the reliability benefit of network coding is not known. This paper

Massachusetts at Amherst, University of

84

Design of a variable gain amplifier for an ultrawideband receiver  

E-Print Network [OSTI]

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...

Krishnanji, Sivasankari

2005-11-01T23:59:59.000Z

85

Generalized solar load ratio correlation for direct gain buildings  

SciTech Connect (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

86

1 INTRODUCTION Alternative energy sources have increasingly gained  

E-Print Network [OSTI]

1 INTRODUCTION Alternative energy sources have increasingly gained the interest for governments it is required, is a major concern for alternative energy systems. Profits and environmental benefits, research institutes, academia, and industry in order to advance the penetration of sustainable energy

Sandborn, Peter

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

Extractive Institutions and Gains From Trade: Evidence from Colonial Africa  

E-Print Network [OSTI]

. First, because of the low population densities of French Africa and the high cost of labor rela- tive (2013) tests this hypothesis in the African context showing that lower population density is correlatedExtractive Institutions and Gains From Trade: Evidence from Colonial Africa Federico Tadei A common

Faraon, Andrei

89

PiPe dreams? Jobs Gained, Jobs Lost  

E-Print Network [OSTI]

Petroleum Institute that, if constructed, TransCanada's proposed Keystone XL (KXL) pipeline will generatePiPe dreams? Jobs Gained, Jobs Lost by the ConstruCtion of Keystone XL a rePort by Corne, and Induced) Jobs from Keystone XL 26 KXL Will Have Minor Impact on Unemployment Levels 27 Four Ways Keystone

Danforth, Bryan Nicholas

90

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

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

Buffer Overflow and Null Pointer Dereference Lets Local Users Gain Elevated Privileges U-094: EMC Documentum Content Server Lets Local Administrative Users Gain Elevated Privileges...

91

E-Print Network 3.0 - adaptive gain integrating Sample Search...  

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

is based on a hybrid combination of gain scheduling, B- spline... combination of gain scheduling, B-spline approximation, variable structure control and integral control... the...

92

Radio interferometric gain calibration as a complex optimization problem  

E-Print Network [OSTI]

Recent developments in optimization theory have extended some traditional algorithms for least-squares optimization of real-valued functions (Gauss-Newton, Levenberg-Marquardt, etc.) into the domain of complex functions of a complex variable. This employs a formalism called the Wirtinger derivative, and derives a full-complex Jacobian counterpart to the conventional real Jacobian. We apply these developments to the problem of radio interferometric gain calibration, and show how the general complex Jacobian formalism, when combined with conventional optimization approaches, yields a whole new family of calibration algorithms, including those for the polarized and direction-dependent gain regime. We further extend the Wirtinger calculus to an operator-based matrix calculus for describing the polarized calibration regime. Using approximate matrix inversion results in computationally efficient implementations; we show that some recently proposed calibration algorithms such as StefCal and peeling can be understood...

Smirnov, Oleg

2015-01-01T23:59:59.000Z

93

attenuation coefficient determination: Topics by E-print Network  

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

The emissivity-reduction coefficient ranges from about 0.44 to 1.00 within the umbra and 0.29 to 0.72 in the sunspot, and accounts for only abo... Ilonidis, Stathis;...

94

activity coefficient model: Topics by E-print Network  

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

coefficient and viscosity of popular rigid water models: Two non polarizable ones (SPCE with 3 sites, and TIP4P2005 with 4 sites) and a polarizable one (Dang-Chang, 4...

95

activity coefficient models: Topics by E-print Network  

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

coefficient and viscosity of popular rigid water models: Two non polarizable ones (SPCE with 3 sites, and TIP4P2005 with 4 sites) and a polarizable one (Dang-Chang, 4...

96

Commuting differential operators of rank 2 with polynomial coefficients  

E-Print Network [OSTI]

In this paper we study self-adjoint commuting ordinary differential operators with polynomial coefficients. These operators define commutative subalgebras of the first Weyl algebra. We find new examples of commuting operators of rank 2.

Vardan Oganesyan

2014-09-29T23:59:59.000Z

97

Measurements of molecular and thermal diffusion coefficients in ternary mixtures  

E-Print Network [OSTI]

of a polymer and a colloid in a water-ethanol solvent, treating the ternary mixture as a pseudobinary; Gans et polymer in a water-ethanol solvent mixture. They reported a sign change in the Soret coefficient

Firoozabadi, Abbas

98

On the friction coefficient of straight-chain aggregates  

E-Print Network [OSTI]

A methodology to calculate the friction coefficient of an aggregate in the continuum regime is proposed. The friction coefficient and the monomer shielding factors, aggregate-average or individual, are related to the molecule-aggregate collision rate that is obtained from the molecular diffusion equation with an absorbing boundary condition on the aggregate surface. Calculated friction coefficients of straight chains are in very good agreement with previous results, suggesting that the friction coefficients may be accurately calculated from the product of the collision rate and an average momentum transfer,the latter being independent of aggregate morphology. Langevin-dynamics simulations show that the diffusive motion of straight-chain aggregates may be described either by a monomer-dependent or an aggregate-average random force, if the shielding factors are appropriately chosen.

Lorenzo Isella; Yannis Drossinos

2010-07-16T23:59:59.000Z

99

apparent diffusion coefficient: Topics by E-print Network  

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

4 sites). We exploit the dependence of the diffusion coefficient on the system size Yeh and Hummer, J. Phys. Chem. B 108, 15873 (2004) to obtain the size-independent...

100

apparent diffusion coefficients: Topics by E-print Network  

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

4 sites). We exploit the dependence of the diffusion coefficient on the system size Yeh and Hummer, J. Phys. Chem. B 108, 15873 (2004) to obtain the size-independent...

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

A dynamic model for the Lagrangian stochastic dispersion coefficient  

SciTech Connect (OSTI)

A stochastic sub-grid model is often used to accurately represent particle dispersion in turbulent flows using large eddy simulations. Models of this type have a free parameter, the dispersion coefficient, which is not universal and is strongly grid-dependent. In the present paper, a dynamic model for the evaluation of the coefficient is proposed and validated in decaying homogeneous isotropic turbulence. The grid dependence of the static coefficient is investigated in a turbulent mixing layer and compared to the dynamic model. The dynamic model accurately predicts dispersion statistics and resolves the grid-dependence. Dispersion statistics of the dynamically calculated constant are more accurate than any static coefficient choice for a number of grid spacings. Furthermore, the dynamic model produces less numerical artefacts than a static model and exhibits smaller sensitivity in the results predicted for different particle relaxation times.

Pesmazoglou, I.; Navarro-Martinez, S., E-mail: s.navarro@imperial.ac.uk [Department of Mechanical Engineering, Imperial College, London SW7 2AZ (United Kingdom); Kempf, A. M. [Chair of Fluid Dynamics, Institute for Combustion and Gasdynamics and Center for Computational Sciences and Simulation, Universität Duisburg-Essen, Duisburg, 47048 (Germany)] [Chair of Fluid Dynamics, Institute for Combustion and Gasdynamics and Center for Computational Sciences and Simulation, Universität Duisburg-Essen, Duisburg, 47048 (Germany)

2013-12-15T23:59:59.000Z

102

Use of structure coefficients in published reports of regression analysis  

E-Print Network [OSTI]

for the multiplicative weights can no longer be used alone in formulating interpretations. Although many techniques have been suggested to help in these situations, structure coefficients, or the correlations between predictor variables and the synthetic variable...

Courville, Troy Gerard

1999-01-01T23:59:59.000Z

103

Work and energy gain of heat-pumped quantized amplifiers  

E-Print Network [OSTI]

We investigate heat-pumped single-mode amplifiers of quantized fields in high-Q cavities based on non-inverted two-level systems. Their power generation is shown to crucially depend on the capacity of the quantum state of the field to accumulate useful work. By contrast, the energy gain of the field is shown to be insensitive to its quantum state. Analogies and differences with masers are explored.

David Gelbwaser-Klimovsky; Robert Alicki; Gershon Kurizki

2013-10-09T23:59:59.000Z

104

Gaining Top Management Support for Energy Conservation Programs  

E-Print Network [OSTI]

GAINING TOP MANAGEMENT SUPPORT FOR ENERGY CONSERVATION PROGRAMS W. F. Kenney Exxon Chemical Company Florham Park, New Jersey ABSTRACT Sometimes seemingly attractive energy con 1 have attempted to generalize these considerations servation... in your efforts. References [1] W. F. Kenney, IECTC 1983 "Some Observations I on Energy Efficiency and Capital Costs." 17 ESL-IE-84-04-04 Proceedings from the Sixth Annual Industrial Energy Technology Conference Volume I, Houston, TX, April 15...

Kenney, W. F.

1984-01-01T23:59:59.000Z

105

Gain-assisted superluminal light propagation via incoherent pump field  

E-Print Network [OSTI]

We investigate the dispersion and the absorption properties of a weak probe field in a three-level Lambda-type atomic system. We use just an incoherent field for controlling the group velocity of light. It is shown that the slope of dispersion changes from positive to negative just with changing the intensity of the indirect incoherent pumping field. Gain-assisted superluminal light propagation appears in this system. No laser field is used in the pumping processes.

M. Mahmoudi; S. Worya Rabiei; L. Safari; M. Sahrai

2008-08-03T23:59:59.000Z

106

A very high frequency CMOS Variable Gain Amplifier  

E-Print Network [OSTI]

of the VGA output signal . . . . . . . . . 80 Bandwidth with different frequency compensation circuits bias current at 22dB gain setting. . . 84 XIV VGA comparison . . . 88 LIST OF FIGURE FIGURE I 2", 3 and 4'" order sigma-delta modulator SNR vs. input... level . . . . Page 2 Block diagram of a direct conversion receiver. 3 Single transistor transconductor 4 Differential pair 5 Source degeneration amplifier. 6 Four-quadrant multiplier basic architectures . . . . . . . . 10 7 Multiplier as a...

Tan, Siang Tong

2012-06-07T23:59:59.000Z

107

High gain preamplifier based on optical parametric amplification  

DOE Patents [OSTI]

A high-gain preamplifier based on optical parametric amplification. A first nonlinear crystal is operatively connected to a second nonlinear crystal. A first beam relay telescope is operatively connected to a second beam relay telescope, to the first nonlinear crystal, and to the second nonlinear crystal. A first harmonic beamsplitter is operatively connected to a second harmonic beamsplitter, to the first nonlinear crystal, to the second nonlinear crystal, to the first beam relay telescope, and to the second beam relay telescope.

Jovanovic, Igor; Bonner, Randal A.

2004-08-10T23:59:59.000Z

108

Incremental cooling load determination for passive direct gain heating systems  

SciTech Connect (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

109

Coefficient quantization effects in block state variable digital filters  

E-Print Network [OSTI]

COEFFICIENT QUANTIZATION EFFECTS IN BLOCK STATE VARIABLE DIGITAL FILTERS A Thesis by KAB JOO LEE Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1991 Major Subject: Electrical Engineering COEFFICIENT QIJANTIZATIOU EFFECTS IN l3LOCI~ STATE VARIABLE DIGITAL FILTERS A Thesis hs IiAB JOO LEE Approved as to style and content by: WVilliam G. )3liss (Chair of Comnaittee) Norman C...

Lee, Kab Joo

2012-06-07T23:59:59.000Z

110

Notes 14. Experimental identification of bearing force coefficients  

E-Print Network [OSTI]

An example of system parameter identification (Hybrid Brush Seal) Luis San Andr?s (lecturer) Thanks to Adolfo Delgado, Jos? Baker (RAs) & support from Siemens Power Generation MEEN 617 - April 2008 Structural parameters K shaft = 243 lbf/in (42...Notes 14. IDENTIFICATION OF BEARING FORCE COEFFICIENTS. ? Dr. Luis San Andr?s (2009) 1 Handout # 14 (MEEN 626) Application example Experimental identification of bearing force coefficients Experimental identification of the dynamic force...

San Andres, Luis

2009-01-01T23:59:59.000Z

111

Coefficient ? as a growth analysis parameter for wheat  

E-Print Network [OSTI]

Subject: Agronony COEFFICIENT u AS A GROWTH ANALYSIS PARAMETER FOR WHEAT A Thesis by JEAN-FRANCOIS LEDENT Approved as to style and content by: c x& W&~ (Chairman of Committee) (Member ) (Head of Department) Member) (Member) /'L~C e (Memb er...) August 1969 ABSTRACT COEFFICIL'NT u AS A GROWTH ANALYSIS PARAMETER FOR WHEAT (August 1969) Jean-Francoi. s Ledent, Ingenieur Agronome, Universite de Louvain (Belgium) Directed by: Dr. E. C. Holt Coefficient u , a growth parameter. , was calculated...

Ledent, Jean-Francois

1969-01-01T23:59:59.000Z

112

Spatially Similar Practice Immediately Following Motor Sequence Learning Eliminates Offline Gains  

E-Print Network [OSTI]

early during motor sequence learning but highlight the sensitivity of offline gains to task practice order....

Handa, Atul

2012-11-30T23:59:59.000Z

113

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

SciTech Connect (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

114

LIMB-DARKENING COEFFICIENTS FOR ECLIPSING WHITE DWARFS  

SciTech Connect (OSTI)

We present extensive calculations of linear and nonlinear limb-darkening coefficients as well as complete intensity profiles appropriate for modeling the light-curves of eclipsing white dwarfs. We compute limb-darkening coefficients in the Johnson-Kron-Cousins UBVRI photometric system as well as the Large Synoptic Survey Telescope (LSST) ugrizy system using the most up to date model atmospheres available. In all, we provide the coefficients for seven different limb-darkening laws. We describe the variations of these coefficients as a function of the atmospheric parameters, including the effects of convection at low effective temperatures. Finally, we discuss the importance of having readily available limb-darkening coefficients in the context of present and future photometric surveys like the LSST, Palomar Transient Factory, and the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS). The LSST, for example, may find {approx}10{sup 5} eclipsing white dwarfs. The limb-darkening calculations presented here will be an essential part of the detailed analysis of all of these systems.

Gianninas, A.; Strickland, B. D.; Kilic, Mukremin [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, OK 73019 (United States)] [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, OK 73019 (United States); Bergeron, P., E-mail: alexg@nhn.ou.edu, E-mail: benstrickland@ou.edu, E-mail: kilic@ou.edu, E-mail: bergeron@astro.umontreal.ca [Departement de Physique, Universite de Montreal, C.P. 6128, Succ. Centre-Ville, Montreal, Quebec H3C 3J7 (Canada)

2013-03-20T23:59:59.000Z

115

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

116

RECOMBINATION RATE COEFFICIENTS OF Be-LIKE Si  

SciTech Connect (OSTI)

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

117

CIP methods for hyperbolic system with variable and discontinuous coefficient  

E-Print Network [OSTI]

We propose a multi-moment method for one-dimensional hyperbolic equations with smooth coefficient and piecewise constant coefficient. The method is entirely based on the backward characteristic method and uses the solution and its derivative as unknowns and cubic Hermite interpolation for each computational cell. The exact update formula for solution and its derivative is derived and used for an efficient time integration. At points of discontinuity of wave speed we define a piecewise cubic Hermite interpolation based on immersed interface method. The method is extended to the one-dimensional Maxwell's equations with variable material properties.

Ito, Kazufumi

2011-01-01T23:59:59.000Z

118

Heat-transfer coefficients in agitated vessels. Latent heat models  

SciTech Connect (OSTI)

Latent heat models were developed to calculate heat-transfer coefficients in agitated vessels for two cases: (1) heating with a condensable fluid flowing through coils and jackets; (2) vacuum reflux cooling with an overhead condenser. In either case the mathematical treatment, based on macroscopic balances, requires no iterative schemes. In addition to providing heat-transfer coefficients, the models predict flow rates of service fluid through the coils and jackets, estimate the percentage of heat transfer due to latent heat, and compute reflux rates.

Kumpinsky, E. [Ashland Chemical Co., Columbus, OH (United States)] [Ashland Chemical Co., Columbus, OH (United States)

1996-03-01T23:59:59.000Z

119

Connection coefficients for basic Harish-Chandra series  

E-Print Network [OSTI]

Basic Harish-Chandra series are asymptotically free meromorphic solutions of the system of basic hypergeometric difference equations associated to root systems. The associated connection coefficients are explicitly computed in terms of Jacobi theta functions. We interpret the connection coefficients as the transition functions for asymptotically free meromorphic solutions of Cherednik's root system analogs of the quantum Knizhnik-Zamolodchikov equations. They thus give rise to explicit elliptic solutions of root system analogs of dynamical Yang-Baxter and reflection equations. Applications to quantum c-functions, basic hypergeometric functions, reflectionless difference operators and multivariable Baker-Akhiezer functions are discussed.

Jasper V. Stokman

2014-02-10T23:59:59.000Z

120

Lattice-structures and constructs with designed thermal expansion coefficients  

SciTech Connect (OSTI)

A thermal expansion-managed lattice structure having a plurality of unit cells each having flexure bearing-mounted tabs supported on a base and actuated by thermal expansion of an actuator having a thermal expansion coefficient greater than the base and arranged so that the tab is inwardly displaced into a base cavity. The flexure bearing-mounted tabs are connected to other flexure-bearing-mounted tabs of adjacent unit cells so that the adjacent unit cells are spaced from each other to accommodate thermal expansion of individual unit cells while maintaining a desired bulk thermal expansion coefficient of the lattice structure as a whole.

Spadaccini, Christopher; Hopkins, Jonathan

2014-10-28T23:59:59.000Z

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.


121

Electrical and Optical Gain Lever Effects in InGaAs Double Quantum Well Diode Lasers  

SciTech Connect (OSTI)

In multisection laser diodes, the amplitude or frequency modulation (AM or FM) efficiency can be improved using the gain lever effect. To study gain lever, InGaAs double quantum well (DQW) edge emitting lasers have been fabricated with integrated passive waveguides and dual sections providing a range of split ratios from 1:1 to 9:1. Both the electrical and the optical gain lever have been examined. An electrical gain lever with greater than 7 dB enhancement of AM efficiency was achieved within the range of appropriate DC biasing currents, but this gain dropped rapidly outside this range. We observed a 4 dB gain in the optical AM efficiency under non-ideal biasing conditions. This value agreed with the measured gain for the electrical AM efficiency under similar conditions. We also examined the gain lever effect under large signal modulation for digital logic switching applications. To get a useful gain lever for optical gain quenched logic, a long control section is needed to preserve the gain lever strength and a long interaction length between the input optical signal and the lasing field of the diode must be provided. The gain lever parameter space has been fully characterized and validated against numerical simulations of a semi-3D hybrid beam propagation method (BPM) model for the coupled electron-photon rate equation. We find that the optical gain lever can be treated using the electrical injection model, once the absorption in the sample is known.

Pocha, M D; Goddard, L L; Bond, T C; Nikolic, R J; Vernon, S P; Kallman, J S; Behymer, E M

2007-01-03T23:59:59.000Z

122

Heat-transfer coefficients in agitated vessels. Sensible heat models  

SciTech Connect (OSTI)

Transient models for sensible heat were developed to assess the thermal performance of agitated vessels with coils and jackets. Performance is quantified with the computation of heat-transfer coefficients by introducing vessel heating and cooling data into model equations. Of the two model categories studied, differential and macroscopic, the latter is preferred due to mathematical simplicity and lower sensitivity to experimental data variability.

Kumpinsky, E. [Ashland Chemical Co., Columbus, OH (United States). Research and Development Dept.

1995-12-01T23:59:59.000Z

123

Adaptive Calculation of Variable Coefficients Elliptic Differential Equations via Wavelets  

E-Print Network [OSTI]

Description Generating a "good" discrete representation for continuous operators is one of the basic problemsAdaptive Calculation of Variable Coefficients Elliptic Differential Equations via Wavelets Amir rather than in the original physical space can speed up the performance of the sparse solver by a factor

Averbuch, Amir

124

On signal reconstruction from absolute value of frame coefficients  

E-Print Network [OSTI]

Edidinb a Siemens Corporate Research, 755 College Road East, Princeton, NJ 08540; b Department transformation from the initial Hilbert space to the space of coefficients obtained by taking the inner product frames, Further author information: Send correspondence to Radu Balan Radu Balan: E-mail: radu.balan@siemens

Casazza, Pete

125

The effective magnetoelectric coefficients of polycrystalline multiferroic composites  

E-Print Network [OSTI]

, emphasizing the effects of shape, volume fraction, and orien- tation distribution of particles of both phases and coupling factors, while randomly oriented particles lead to essentially zero ME coupling, even though that the large discrepancy between theoretical calculations and experimental measurements for ME coefficients

Li, Jiangyu

126

Does the photon-diffusion coefficient depend on absorption?  

E-Print Network [OSTI]

Does the photon-diffusion coefficient depend on absorption? T. Durduran and A. G. Yodh Department independent of absorption, i.e., D0 v/3 s . After presentation of the general theoretical arguments underlying this assertion, Monte Carlo simulations are performed and explicitly reveal that the absorption- independent

Boas, David

127

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

128

Indoor Dose Conversion Coefficients for Radon Progeny for Different  

E-Print Network [OSTI]

Indoor Dose Conversion Coefficients for Radon Progeny for Different Ambient Environments K . N . Y Inhaled progeny of 222Rn (radon progeny) are the most important source of irradiation of the human-, urban-, and marine-influenced aerosols. The ASDs of attached radon progeny for all three studied ambient

Yu, K.N.

129

IDENTIFICATION OF UNDERWATER VEHICLE HYDRODYNAMIC COEFFICIENTS USING FREE  

E-Print Network [OSTI]

been an ever increasing num- ber of applications for unmanned underwater vehicles (UUV) in variousIDENTIFICATION OF UNDERWATER VEHICLE HYDRODYNAMIC COEFFICIENTS USING FREE DECAY TESTS Andrew Ross the potential accuracy of these new methods. Copyright c 2004 IFAC. Keywords: Low-speed underwater vehicles

Johansen, Tor Arne

130

Lifshitz tails for the Interband Light Absorption Coefficient  

E-Print Network [OSTI]

In this paper we consider the Interband Light Absorption Coefficient for various models. We show that at the lower and upper edges of the spectrum the Lifshitz tails behaviour of the density of states implies similar behaviour for the ILAC at appropriate energies. The Lifshitz tails property is also exhibited at some points corresponding to the internal band edges of the density of states.

W. Kirsch; M. Krishna

2009-03-31T23:59:59.000Z

131

E-Print Network 3.0 - activity coefficient Sample Search Results  

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

USING INTERSCALE PHASE RELATIONSHIPS OF COMPLEX WAVELET COEFFICIENTS... Wavelet Transform (DT- CWT) but a phase rotation is applied to the coefficients to create complex...

132

Progress on achieving the ICF conditions needed for high gain  

SciTech Connect (OSTI)

Progress during the past two years has moved us much closer to demonstrating the scientific and technological requirements for high gain ICF in the laboratory. This progress has been made possible by operating at the third harmonic of 1..mu..m light which dramatically reduces concern about hot electrons and by advances in diagnostics such as 100 ps x-ray framing cameras which greatly increase the data available from each experiment. Making use of many of these new capabilities, major improvements in confinement conditions have been achieved for ICF implosions. In particular, in an optimized hohlraum on Nova, radiation driven implosions with convergence ratio in excess of 30 (volume compression /approximately/3 /times/ 10/sup 4/) have performed essentially as predicted by spherical implosion calculations. This paper presents these results as well as examples of advances in several other areas and discusses the implications for the future of ICF with lasers and heavy ion beam drivers. 8 refs., 10 figs.

Lindl, J.D.

1988-12-23T23:59:59.000Z

133

Relative Gain Monitoring of the GlueX Calorimeters  

SciTech Connect (OSTI)

The relative gain of the photodetectors for the GlueX Barrel and Forward calorimeters will be monitored using modular LED driver systems. The BCAL system consists of a global controller that feeds power, bias voltage and trigger signals to 96 local controllers situated at the ends of the 48 BCAL modules, which drive 40 LEDs associated with the 40 light guides at the end of each module. The FCAL system consists also of a global controller, a local controller for each acrylic quadrant covering the face of the FCAL, and ten 4-LED pulser boards per local controller connected in a star configuration along the edges of the acrylic panes. The respective systems are currently being installed on the detectors and their tested performance is presented herein.

Anassontzis, Efstratios G. [JLAB/National and Kapodestrian University of Athens (Greece); Ioannou, P. [National and Kapodestrian University of Athens (Greece); Kourkoumelis, C. [National and Kapodestrian University of Athens (Greece); Vasileiadis, G. [National and Kapodestrian University of Athens (Greece); Voulgaris, G. [National and Kapodestrian University of Athens (Greece); Kappos, E. [Symmetron Electronic Applications, Gerakas (Greece); Beattie, T. [University of Regina, Saskatchewan (Canada); Krueger, S. [University of Regina, Saskatchewan (Canada); Lolos, G. J. [University of Regina, Saskatchewan (Canada); Papandreou, Z. [University of Regina, Saskatchewan (Canada); Semenov, A. Yu. [University of Regina, Saskatchewan (Canada); Frye, John M. [Indiana Univ., Bloomington, IN (United States); Leckey, John P. [Indiana Univ., Bloomington, IN (United States); Shepherd, Matt [Indiana Univ., Bloomington, IN (United States); Bogart, T. [JLAB/CNU, Newport News, VA (United States); Lawrence, David W. [JLAB, Newport News, VA (United States); Smith, Elton S. [JLAB, Newport News, VA (United States)

2014-02-01T23:59:59.000Z

134

Heat transfer coefficients in three phase fluidized beds  

SciTech Connect (OSTI)

In order to obtain a semitheoretical correlation for the heat transfer coefficients in three phase fluidized beds, Deckwer's semitheoretical correlation for the heat transfer coefficients in the bubble column, which was derived from Higbie's surface renewal theory of interphase mass transfer with the concept of isotropic turbulence, has been extended to three phase fluidized beds with the modification of the energy dissipation rate. One of the desirable characteristics of three phase fluidized beds is the uniformity of temperature in the bed. The intense longitudinal and transverse turbulent mixing in a fluidized bed may induce the uniform fields of temperature and solids concentration. For highly exothermic reactions, the uniform temperature in the bed is essential to avoid the local hot spots. In order to control the uniform temperature of three phase fluidized beds, the addition or removal of heat in the bed is required and the information on heat transfer surface and the bed is essential to designing the heat exchanger. Recently, Chiu and Ziegler (1983) determined wall-to-bed heat transfer coefficients in three phase fluidized bed (5.08 cm ID) of glass beads and cylindrical gamma alumina particles which were fluidized by cocurrent flow of air and water. Their data were correlated in terms of the modified Colburn j factor. Kato et al. (1981) measured wall-to-bed heat transfer coefficients in three phase fluidized beds of 5.2 and 12.0 cm internal diameter. Four different sizes of glass beads (0.42-2.2 mm) were fluidized by air and aqueous carboxymethyl cellulose solutions. The coefficients increased with decrease in liquid viscosity and with increase in gas and liquid velocity.

Suh, I.S.; Jin, G.T.; Kim, S.D.

1985-03-01T23:59:59.000Z

135

E-Print Network 3.0 - annual weight gain Sample Search Results  

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

3 4 5 6 7 8 0 0.5 1 1.5 2 x 10 -3 Lag (trials) RegressionWeight... on effective Gain Landscape The optimal strategy, maximizing expected gain, requires the subject to shift... of...

136

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

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

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...

137

40 ELR 11106 ENVIRONMENTAL LAW REPORTER 11-2010 Gaining Ground: Wetlands,  

E-Print Network [OSTI]

40 ELR 11106 ENVIRONMENTAL LAW REPORTER 11-2010 Gaining Ground: Wetlands, Hurricanes .5% dis- count rate). Marine waters, wetlands, swamps, agricultural lands, and forests provide natural goods and services . The 1 . David Batker et al ., Gaining Ground: Wetlands, Hurricanes

Vermont, University of

138

Investigation of spectrally broad gain multiple-width quantum well material for colliding pulse  

E-Print Network [OSTI]

and MWQW devices, are shown in Fig. 1. At zero net modal gain, confined material gain is equal just below 1:5 kA cm�2 ; the net modal gain contribution is zero at 1560 nm, corresponding contributed to the zero net modal gain before the narrow wells at a current density of 2­3 kA cm�2 : The 6

139

Room temperature broadband terahertz gains in graphene heterostructures based on inter-layer radiative transitions  

SciTech Connect (OSTI)

We exploit inter-layer radiative transitions to provide gains to amplify terahertz waves in graphene heterostructures. This is achieved by properly doping graphene sheets and aligning their energy bands so that the processes of stimulated emissions can overwhelm absorptions. We derive an expression for the gain estimation and show the gain is insensitive to temperature variation. Moreover, the gain is broadband and can be strong enough to compensate the free carrier loss, indicating graphene based room temperature terahertz lasers are feasible.

Tang, Linlong [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China); Du, Jinglei, E-mail: dujl@scu.edu.cn [Key Laboratory of High Energy Density Physics and Technology, College of Physics and Technology, Sichuan University, Chengdu, 610064 (China); Shi, Haofei, E-mail: shi@cigit.ac.cn; Wei, Dongshan; Du, Chunlei, E-mail: cldu@cigit.ac.cn [Chongqing institute of green and intelligent technology, Chinese Academy of Sciences, Chongqing, 401122 (China)

2014-10-15T23:59:59.000Z

140

EXTENSION CENTER FOR COMMUNITY VITALITY Continuing the Trend: The Brain Gain  

E-Print Network [OSTI]

EXTENSION CENTER FOR COMMUNITY VITALITY Continuing the Trend: The Brain Gain of the Newcomers Fellow, University of Minnesota Extension Center for Community Vitality #12;Brain Gain 2010 i Report Reviewers: Neil Linscheid Scott Chazdon Continuing the Trend: The Brain Gain of the Newcomers A GENERATIONAL

Minnesota, University of

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

Appropriate Realisation of MIMO Gain-Scheduled Controllers W.E. Leithead  

E-Print Network [OSTI]

Appropriate Realisation of MIMO Gain-Scheduled Controllers D.J.Leith W.E. Leithead Department characteristics of a controller designed by the gain-scheduling approach can be strongly dependent realisations for general MIMO gain-scheduled controllers. An extended local linear equivalence condition

Duffy, Ken

142

Interpolated versus Polytopic Gain Scheduling Control Laws for Fin/Rudder Roll Stabilisation of Ships  

E-Print Network [OSTI]

Interpolated versus Polytopic Gain Scheduling Control Laws for Fin/Rudder Roll Stabilisation be done through the use of gain-scheduling (GS) control law. In this study, a GS-control law is obtained and a desired stabilisation quality factor. Gain scheduling is a way to obtain parameter dependent controllers

Paris-Sud XI, Université de

143

A GAIN SCHEDULED CONTROL LAW FOR FIN/RUDDER ROLL STABILISATION OF SHIPS  

E-Print Network [OSTI]

A GAIN SCHEDULED CONTROL LAW FOR FIN/RUDDER ROLL STABILISATION OF SHIPS Hervé Tanguy , Guy Lebret leads to a gain-scheduled control law. The synthesis is based on multi-objective optimisation stabilisation; H control; Gain Scheduled Control; polytopic representation; LMI. 1. INTRODUCTION A major

Paris-Sud XI, Université de

144

Iterative solution of ordinary differential equations with polynomial coefficients  

E-Print Network [OSTI]

ITERATIVE SOLUTION OF ORDINARY DIFFERENTIAL EQUATIONS WITH POLYNOMIAL COEFFICIENTS A Thesis By JIMMIE CHARLES RHEA FOREHAND Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1965 Major Subject Mathematics FAMILIES OF FIFTH ORDER RUNGE-KUTTA FORMULAS A Thesis By HARRY PAUL KONEN 4 0 0 IXI v 0 Approved as to style and content by: (Chairman of Committee) (Head of Departmen...

Forehand, Jimmie Charles Rhea

1965-01-01T23:59:59.000Z

145

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

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

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

Newsom, Rob; Goldsmith, John

146

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

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

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

Sivaraman, Chitra; Flynn, Connor

147

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

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

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

Sivaraman, Chitra; Flynn, Connor

148

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

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

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

Sivaraman, Chitra; Flynn, Connor

149

NUMERICAL CALCULATIONS FOR THE ASYMPTOTIC, DIFFUSION DOMINATED MASS-TRANSFER COEFFICIENT IN PACKED BED REACTORS  

E-Print Network [OSTI]

Calculations for the Asymptotic, Diffusion Dominated Mass-Transfer Coefficient in Packed Bed Reactors

Fedkiw, Peter

2011-01-01T23:59:59.000Z

150

Estimation of tracer diffusion coefficients of ions in aqueous solution  

SciTech Connect (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

151

GAiN: Distributed Array Computation with Python  

SciTech Connect (OSTI)

Scientific computing makes use of very large, multidimensional numerical arrays - typically, gigabytes to terabytes in size - much larger than can fit on even the largest single compute node. Such arrays must be distributed across a "cluster" of nodes. Global Arrays is a cluster-based software system from Battelle Pacific Northwest National Laboratory that enables an efficient, portable, and parallel shared-memory programming interface to manipulate these arrays. Written in and for the C and FORTRAN programming languages, it takes advantage of high-performance cluster interconnections to allow any node in the cluster to access data on any other node very rapidly. The "numpy" module is the de facto standard for numerical calculation in the Python programming language, a language whose use is growing rapidly in the scientific and engineering communities. numpy provides a powerful N-dimensional array class as well as other scientific computing capabilities. However, like the majority of the core Python modules, numpy is inherently serial. Our system, GAiN (Global Arrays in NumPy), is a parallel extension to Python that accesses Global Arrays through numpy. This allows parallel processing and/or larger problem sizes to be harnessed almost transparently within new or existing numpy programs.

Daily, Jeffrey A.

2009-04-24T23:59:59.000Z

152

Enhancing optical gains in Si nanocrystals via hydrogenation and cerium ion doping  

SciTech Connect (OSTI)

We report optical gain enhancements in Si nanocrystals (Si-NCs) via hydrogenation and Ce{sup 3+} ion doping. Variable stripe length technique was used to obtain gains. At 0.3?W/cm{sup 2} pumping power density of pulsed laser, net gains were observed together with gain enhancements after hydrogenation and/or Ce{sup 3+} ion doping; gains after loss corrections were between 89.52 and 341.95?cm{sup ?1}; and the photoluminescence (PL) lifetime was found to decrease with the increasing gain enhancement. At 0.04?W/cm{sup 2} power density, however, no net gain was found and the PL lifetime increased with the increasing PL enhancement. The results were discussed according to stimulated and spontaneous excitation and de-excitation mechanisms of Si-NCs.

Wang, Dong-Chen; Li, Yan-Li; Song, Sheng-Chi; Guo, Wen-Ping; Lu, Ming, E-mail: minglu55@fudan.edu.cn [Department of Optical Science and Engineering, and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433 (China); Chen, Jia-Rong [Department of Optical Science and Engineering, and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433 (China); School of Information Engineering, Guizhou Minzu University, Guiyang 550025 (China)

2014-07-28T23:59:59.000Z

153

The effect of an evaporation suppressant upon the liquid film oxygen transfer coefficient  

E-Print Network [OSTI]

" ? By Winkler Method 32 Oxygen Transfer Coefficient At 21'C Using Distilled Water Without "Aquasave" ? By Winkler Method 33 Oxygen Transfer Coefficient At 36'C Using Distilled Water With "Aquasave" ? By Winkler Method 34 Oxygen Transfer Coefficient At 36'C... Using Distilled Water Without "Aquasave" ? By Winkler Method 35 Oxygen Transfer Coefficient At 21'C Using Blended Water With "Aquasave" ? By D. O. Meter 37 10. Oxygen Transfer Coefficient At 21'C Using Blended Water Without "Aquasave" ? By D. 0...

Amad, Mohamad Towfic

1967-01-01T23:59:59.000Z

154

Bunching coefficients in Echo-Enabled Harmonic Generation  

E-Print Network [OSTI]

Coulombian diffusion determines a dilution of bunching coefficients in Free Electron Laser seeded devices. From the mathematical point of view the effect can be modeled through a heat type equation, which can be merged with the ordinary Liouville equation, ruling the evolution of the longitudinal phase space beam distribution. We will show that the use of analytical tools like the Generalized Bessel Functions and algebraic techniques for the solution of evolution problems may provide a useful method of analysis and shine further light on the physical aspects of the underlying mechanisms.

Dattoli, G

2013-01-01T23:59:59.000Z

155

Asymptotic normalization coefficients for B-10->Be-9+p  

E-Print Network [OSTI]

started the Asymptotic normalization coefficient A. M. Mukhamedzhanov, H. L. Clark, C. A. Gagliardi, Y.-W Cyclotron Institute, Texas A&M University V. Burjan, J. Cejpek Institute for Nuclear Physics, Czech Academ F. Carstoi Institute of Atomic...! the 7Be(p ,g)8B radiative capture cross section at ver astrophysics. @S0556-2813~97!02109-2# PACS number~s!: 25.70.Hi, 21.10.Jx, 24.10.Ht, 25.70.B I. INTRODUCTION Despite considerable experimental and theoretical progress in determining...

Mukhamedzhanov, AM; Clark, HL; Gagliardi, Carl A.; Lui, YW; Trache, L.; Tribble, Robert E.; Xu, HM; Zhou, XG; Burjan, V.; Cejpek, J.; Kroha, V.; Carstoiu, F.

1997-01-01T23:59:59.000Z

156

E-Print Network 3.0 - antipsychotic-induced weight gain Sample...  

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

movement disorders (AIMDs) have been collectively known as extrapyramidal syndromes (EPS... seen with typical antipsychotics (e.g., weight gain, hyperlipidemia, and...

157

E-Print Network 3.0 - antipsychotics-induced weight gain Sample...  

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

movement disorders (AIMDs) have been collectively known as extrapyramidal syndromes (EPS... seen with typical antipsychotics (e.g., weight gain, hyperlipidemia, and...

158

Problemstellung "Brain Drain" bzw. "Brain Gain" in der Region Niederösterreich-Mitte.  

E-Print Network [OSTI]

??Die vorliegende Diplomarbeit befasst sich mit dem Thema des „Brain Drain“ und „Brain Gain“ in der Region Niederösterreich Mitte. Unter "Brain Drain" versteht man die… (more)

Binder, Paul

2012-01-01T23:59:59.000Z

159

Post-Genomics Nanotechnology Is Gaining Momentum: Nanoproteomics and Applications in Life Sciences  

E-Print Network [OSTI]

Post-Genomics Nanotechnology Is Gaining Momentum: Nanoproteomics and Applications in Life Sciences of nanotechnology applications, including nanoporous structures, functionalized nanoparticles, quantum dots

Tan, Weihong

160

Calculation of combined diffusion coefficients in SF{sub 6}-Cu mixtures  

SciTech Connect (OSTI)

Diffusion coefficients play an important role in the description of the transport of metal vapours in gas mixtures. This paper is devoted to the calculation of four combined diffusion coefficients, namely, the combined ordinary diffusion coefficient, combined electric field diffusion coefficient, combined temperature diffusion coefficient, and combined pressure diffusion coefficient in SF{sub 6}-Cu mixtures at temperatures up to 30?000?K. These four coefficients describe diffusion due to composition gradients, applied electric fields, temperature gradients, and pressure gradients, respectively. The influence of copper fluoride and sulfide species on the diffusion coefficients is shown to be negligible. The effect of copper proportion and gas pressures on these diffusion coefficients is investigated. It is shown that increasing the proportion of copper generally increases the magnitude of the four diffusion coefficients, except for copper mole fractions of 90% or more. It is further found that increasing the pressure reduces the magnitude of the coefficients, except for the combined temperature diffusion coefficient, and shifts the maximum of all four coefficients towards higher temperatures. The results presented in this paper can be applied to the simulation of high-voltage circuit breaker arcs.

Zhong, Linlin; Wang, Xiaohua, E-mail: xhw@mail.xjtu.edu.cn; Rong, Mingzhe, E-mail: mzrong@mail.xjtu.edu.cn; Wu, Yi [State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049 (China); Murphy, Anthony B. [CSIRO Manufacturing Flagship, P.O. Box 218, Lindfield, NSW 2070 (Australia)

2014-10-15T23:59:59.000Z

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.


161

Condensation coefficients in plasma sputtering Pascal Brault , Anne-Lise Thomann, Jean-Philippe  

E-Print Network [OSTI]

Condensation coefficients in plasma sputtering deposition Pascal Brault §, Anne-Lise Thomann, Jean Backscattering Spectrom- etry are combined to determine condensation coefficients for plasma sputtering depo- sition. The method is applied for palladium deposition onto various substrates and condensation

Boyer, Edmond

162

Environmental Radioactivity 56 (2001) 327340 Radon progeny dose conversion coefficients for  

E-Print Network [OSTI]

Journal of Environmental Radioactivity 56 (2001) 327­340 Radon progeny dose conversion coefficients; Dose conversion coefficients; Scaling factors; Radon progeny 1. Introduction Epidemiological studies cancer associated with exposure to radon progeny (Lubin, 1988). More recently, Lubin et al (1994

Yu, K.N.

163

PRODUCTIVITY GAINS IN U.S. FISHERIES . FREDERICK W. BELL AND RICHARD K. KINOSHITA I  

E-Print Network [OSTI]

PRODUCTIVITY GAINS IN U.S. FISHERIES . FREDERICK W. BELL AND RICHARD K. KINOSHITA I ABSTRACT Changes in productivity or annual landings per fisherman help to determine the economic welfare of the fishing industry. Although a study of productivity gains in various U.S. fishing fleets over the last 20

164

A low power, high dynamic-range, broadband variable gain amplifier for an ultra wideband receiver  

E-Print Network [OSTI]

gain steps. The gain control scheme includes fine tuning (2dB/step) by changing the bias voltage of the proposed programmable current mirror, and coarse tuning (14dB/step) by switching on/off the source degeneration resistors in the differential pairs...

Chen, Lin

2007-09-17T23:59:59.000Z

165

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

166

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

167

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation  

E-Print Network [OSTI]

Gain Scheduling Control Design of an Erbium-Doped Fibre Amplifier by Pump Compensation Min Ding amplifier's (EDFA's) dynamics. We demonstrate a gain scheduling scheme on a PID controller that minimizes- pensation. The scheduled controller requires only three easily accessible parameters: the total input power

Pavel, Lacra

168

Robust Gain Scheduling techniques for Adaptive control Patrice Antoinette and Gilles Ferreres  

E-Print Network [OSTI]

Robust Gain Scheduling techniques for Adaptive control Patrice Antoinette and Gilles Ferreres for implementing the LFT controller is reduced. This controller is scheduled as a function of the parameters) and of gain- scheduled control (LPV methods) has been (much) less investigated, see for instance [10], [11

169

Coat Color and Solar Heat Gain in Animals Author(s): Glenn E. Walsberg  

E-Print Network [OSTI]

when exposed to solar radiation than do light surfaces. For ani- mals such as birds or mammalsCoat Color and Solar Heat Gain in Animals Author(s): Glenn E. Walsberg Source: BioScience, Vol. 33://www.jstor.org #12;Coat Color and Solar Heat Gain in Animals Glenn E. Walsberg The relationbetween coat color

Cavitt, John F.

170

Optical gain from the direct gap transition of Ge-on-Si at room temperature  

E-Print Network [OSTI]

We report direct band gap optical gain of tensile strained n+ epitaxial Ge-on-Si at room temperature, which confirms that band-engineered Ge-on-Si is a promising gain medium for monolithic optical amplifiers and lasers on Si.

Liu, Jifeng

171

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

E-Print Network [OSTI]

, into the mechanical energy acting on the turbine and generator. The steam generated in the boiler system servesGain-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

Shamma, Jeff S.

172

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 schemes proposed by Yan and Lin (1999b) for modeling the heat transfer coefficient in both a single- phase

Kandlikar, Satish

173

Collective friction coefficients in the relaxation time approximation F. A. Ivanyuk  

E-Print Network [OSTI]

Collective friction coefficients in the relaxation time approximation F. A. Ivanyuk Institute components of the friction coefficient for various single-particle potentials and have found that the nondiagonal component of the friction coefficient depends generally on the diffuseness of the potential

Pomorski, Krzysztof

174

The theoretical ultimate magnetoelectric coefficients of magnetoelectric composites by optimization design  

SciTech Connect (OSTI)

This paper investigates what is the largest magnetoelectric (ME) coefficient of ME composites, and how to realize it. From the standpoint of energy conservation, a theoretical analysis is carried out on an imaginary lever structure consisting of a magnetostrictive phase, a piezoelectric phase, and a rigid lever. This structure is a generalization of various composite layouts for optimization on ME effect. The predicted theoretical ultimate ME coefficient plays a similar role as the efficiency of ideal heat engine in thermodynamics, and is used to evaluate the existing typical ME layouts, such as the parallel sandwiched layout and the serial layout. These two typical layouts exhibit ME coefficient much lower than the theoretical largest values, because in the general analysis the stress amplification ratio and the volume ratio can be optimized independently and freely, but in typical layouts they are dependent or fixed. To overcome this shortcoming and achieve the theoretical largest ME coefficient, a new design is presented. In addition, it is found that the most commonly used electric field ME coefficient can be designed to be infinitely large. We doubt the validity of this coefficient as a reasonable ME effect index and consider three more ME coefficients, namely the electric charge ME coefficient, the voltage ME coefficient, and the static electric energy ME coefficient. We note that the theoretical ultimate value of the static electric energy ME coefficient is finite and might be a more proper measure of ME effect.

Wang, H.-L.; Liu, B., E-mail: liubin@tsinghua.edu.cn [AML, CNMM, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 (China)

2014-03-21T23:59:59.000Z

175

SOLAR MAGNETIC FIELD SIGNATURES IN HELIOSEISMIC SPLITTING COEFFICIENTS  

SciTech Connect (OSTI)

Normal modes of oscillation of the Sun are useful probes of the solar interior. In this work, we use the even-order splitting coefficients to study the evolution of magnetic fields in the convection zone over solar cycle 23, assuming that the frequency splitting is only due to rotation and a large-scale magnetic field. We find that the data are best fit by a combination of a poloidal field and a double-peaked near-surface toroidal field. The toroidal fields are centered at r {sub 0} = 0.999 R {sub sun} and r = 0.996 R {sub sun} and are confined to the near-surface layers. The poloidal field is a dipole field. The peak strength of the poloidal field is 124 +- 17 G. The toroidal field peaks at 380 +- 30 G and 1.4 +- 0.2 kG for the shallower and deeper fields, respectively. The field strengths are highly correlated with surface activity. The toroidal field strength shows a hysteresis-like effect when compared to the global 10.7 cm radio flux. The poloidal field strength shows evidence of saturation at high activity.

Baldner, Charles S.; Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT, 06520-8101 (United States); Antia, H. M. [Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India); Larson, Timothy P., E-mail: charles.baldner@yale.ed [Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305-4085 (United States)

2009-11-10T23:59:59.000Z

176

Diffusion coefficient and radial gradient of galactic cosmic rays  

E-Print Network [OSTI]

We present the temporal changes of the diffusion coefficient K of galactic cosmic rays (GCRs) at the Earth orbit calculated based on the experimental data using two different methods. The first approach is based on the Parker convection-diffusion approximation of GCR modulation [1]: i.e. K~Vr=dI where dI is the variation of the GCR intensity measured by neutron monitors (NM),V is the solar wind velocity and r is the radial distance. The second approach is based on the interplanetary magnetic field (IMF) data. It was suggested that parallel mean free path can be expressed in terms of B as in [2]-[4]. Using data of the product of the parallel mean free path and radial gradient of GCR calculated based on the GCR anisotropy data (Ahluwalia et al., this conference ICRC 2013, poster ID: 487 [5]), we estimate the temporal changes of the radial gradient of GCR at the Earth orbit. We show that the radial gradient exhibits a strong solar cycle dependence (11-year variation) and a weak solar magnetic cycle dependence (2...

Modzelewska, Renata

2015-01-01T23:59:59.000Z

177

Analysis of gain margins and phase margins of a nonlinear reactor control system  

SciTech Connect (OSTI)

By using the gain-phase margin tester, the parameter-plane method for the nonlinear control system is extended to frequency-domain related to gain margin and phase margin. The stability and self-excited oscillation are investigated with respect to the adjustable parameters. The useful information concerning the effect of adjustable parameters can be obtained, after the describing function curves and the boundaries of constant gain margin and constant phase margin are plotted in the parameter plane. Some interesting consequences are offered by employing the practical control system of a material testing reactor.

Chang, C.H.; Chang, M.K. (Chung Cheng Inst. of Technology, Tao-Yuan (Taiwan, Province of China))

1994-08-01T23:59:59.000Z

178

Calibration of photomultipliers gain used in the J-PET detector  

E-Print Network [OSTI]

Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article we describe single photoelectron method used for photomultipliers calibration applied for J-PET scanner, a novel PET detector being developed at the Jagiellonian University. Description of calibration method, an example of calibration curve and gain of few R4998 Hamamatsu photomultipliers are presented.

Bednarski, T; Moskal, P; Bia?as, P; Giergiel, K; Kap?on, ?; Kochanowski, A; Korcyl, G; Kowal, J; Kowalski, P; Kozik, T; Krzemie?, W; Molenda, M; Moskal, I; Nied?wiecki, Sz; Pa?ka, M; Pawlik, M; Raczy?ski, L; Rudy, Z; Salabura, P; Sharma, N G; Silarski, M; S?omski, A; Smyrski, J; Strzelecki, A; Szyma?ski, K; Wi?licki, W; Witkowski, P; Zieli?ski, M; Zo?, N

2013-01-01T23:59:59.000Z

179

Negative differential gain in quantum dot systems: Interplay of structural properties and many-body effects  

SciTech Connect (OSTI)

The saturation behaviour of optical gain with increasing excitation density is an important factor for laser device performance. For active materials based on self-organized InGaAs/GaAs quantum dots, we study the interplay between structural properties of the quantum dots and many-body effects of excited carriers in the optical properties via a combination of tight-binding and quantum-kinetic calculations. We identify regimes where either phase-space filling or excitation-induced dephasing dominates the saturation behavior of the optical gain. The latter can lead to the emergence of a negative differential material gain.

Goldmann, E., E-mail: goldmann@itp.uni-bremen.de; Jahnke, F. [Institute for Theoretical Physics, University of Bremen, Bremen 28359 (Germany); Lorke, M.; Frauenheim, T. [Bremen Center for Computational Materials Science BCCMS, University of Bremen, Bremen 28359 (Germany)

2014-06-16T23:59:59.000Z

180

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

SciTech Connect (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

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

E-Print Network 3.0 - age-dependent weight gain Sample Search...  

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

search results for: age-dependent weight gain Page: << < 1 2 3 4 5 > >> 1 On the Political Mechanisms of the Environmental Kuznets Curve for Global Water Quality1 Summary:...

182

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

183

Extended infrared photoresponse and gain in chalcogen-supersaturated silicon photodiodes  

E-Print Network [OSTI]

Highly supersaturated solid solutions of selenium or sulfur in silicon were formed by ion implantation followed by nanosecond pulsed laser melting. n[superscript +]p photodiodes fabricated from these materials exhibit gain ...

Sullivan, Joseph Timothy

184

Mechanisms of ionizing-radiation-induced gain degradation in lateral PNP BJTs  

SciTech Connect (OSTI)

The physical mechanisms for gain degradation in laterals PNP bipolar transistors are examined experimentally and through simulation. The effect of increased surface recombination velocity at the base surface is moderated by positive oxide charge.

Schmidt, D.M.; Wu, A.; Schrimpf, R.D. [Arizona Univ., Tucson, AZ (United States), Dept. of ECE; Fleetwood, D.M. [Sandia National Labs., Albuquerque, NM (United States); Pease, R.L. [RLP Research, Inc., Albuquerque, NM (United States); Combs, W.E. [Naval Surface Warfare Center, Crane, IN (United States). Crane Div.

1996-03-01T23:59:59.000Z

185

Gain margin and phase margin analysis of a nuclear reactor control system with multiple transport lags  

SciTech Connect (OSTI)

In this paper a method for finding the boundaries of constant gain margin and phase margin of control systems with transport lags and adjustable parameters is presented. The considered systems are first modified by adding a gain-phase margin tester, then the characteristic equations are formulated, and finally the stability equations are used to find the boundaries of constant gain margin and phase margin. The main advantage of the proposed method is to obtain complete information about the effects of adjustable parameters on gain margin and phase margin and their corresponding crossover frequencies. In order to show the usefulness of the proposed method a nuclear reactor control system with multiple transport lags is chosen as one of the examples.

Chang, C.H. (Institute of Electronics, National Chiao-Tung Univ. (TW)); Han, K.W. (Chung-Shan Institute and National Chiao-Tung Univ., Hsinchu (TW))

1989-08-01T23:59:59.000Z

186

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

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

Linux Kernel SGIO 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...

187

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

188

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

189

DEMONSTRATION OF 3D EFFECTS WITH HIGH GAIN AND EFFICIENCY IN A UV FEL OSCILLATOR  

SciTech Connect (OSTI)

We report on the performance of a high gain UV FEL oscillator operating on an energy recovery linac at Jefferson Lab. The high brightness of the electron beam leads to both gain and efficiency that cannot be reconciled with a one-dimensional model. Three-dimensional simulations do predict the performance with reasonable precision. Gain in excess of 100% per pass and an efficiency close to 1/2NW, where NW is the number of wiggler periods, is seen. The laser mirror tuning curves currently permit operation in the wavelength range of 438 to 362 nm. Another mirror set allows operation at longer wavelengths in the red with even higher gain and efficiency.

Stephen Benson; George Biallas; Keith Blackburn; James Boyce; Donald Bullard; James Coleman; Cody Dickover; David Douglas; Forrest Ellingsworth; Pavel Evtushenko; Carlos Hernandez-Garcia; Christopher Gould; Joseph Gubeli; David Hardy; Kevin Jordan; John Klopf; James Kortze; Robert Legg; Matthew Marchlik; Steven Moore; George Neil; Thomas Powers; Daniel Sexton; Michelle D. Shinn; Christopher Tennant; Richard Walker; Anne Watson; Gwyn Williams; Frederick Wilson; Shukui Zhang

2011-03-01T23:59:59.000Z

190

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

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

Unspecified Flaw Lets Remote Users Gain Access U-212: RSA Authentication Manager Flaws Permit Cross-Site and Cross-Frame Scripting and URL Redirection Attacks U-026: Cisco Small...

191

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

192

Spatial Interference Mitigation for Multiple Input Multiple Output Ad Hoc Networks: MISO Gains  

E-Print Network [OSTI]

Spatial Interference Mitigation for Multiple Input Multiple Output Ad Hoc Networks: MISO Gains beamforming for a multiple input single output (MISO) ad hoc network to increase the density of successful

Paris-Sud XI, Université de

193

Gain-scheduled controller design for load-following in static space nuclear power systems  

E-Print Network [OSTI]

of variations in the fuel temperature reactivity feedback coeficient on the load-following capabilities of the SNPS. Robustness analysis results of the gain-scheduled compensator demonstrate that the proposed control concept exhibits a significant degree...

Onbasioglu, Fetiye Ozlem

1993-01-01T23:59:59.000Z

194

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

195

Lateral solids dispersion coefficient in large-scale fluidized beds  

SciTech Connect (OSTI)

The design of fuel feed ports in a large-scale fluidized bed combustor depends on the fuel characteristics and lateral solids mixing. However, the reported values of the effective lateral solids dispersion coefficient (D{sub sr}) are scattered in the broad range of 0.0001-0.1 m{sup 2}/s. With the aim of predicting D{sub sr} in wider fluidized beds which is difficult to measure directly or deduce from experimental results in lab-scale facilities, a computational method is proposed. It combines the Eulerian-Granular simulation and fictitious particle tracing technique. The value of D{sub sr} is calculated based on the movement of the tracers. The effect on D{sub sr} of bed width (W) ranging from 0.4 m up to 12.8 m at different levels of superficial gas velocity (U{sub 0}) is investigated. It is found that increasing W whilst maintaining U{sub 0}, D{sub sr} initially increases markedly, then its increase rate declines, and finally it stays around a constant value. The computed values of D{sub sr} are examined quantitatively and compared with a thorough list of the measured D{sub sr} in the literature since 1980s. Agreed with the measurements performed in the pilot-scale fluidized beds, the value of D{sub sr} in wider facilities at higher fluidizing velocities is predicted to be around the order of magnitude of 0.1 m{sup 2}/s, much higher than that in lab-scale beds. Finally, the effect of D{sub sr} on the distribution of fuel particles over the cross section in fluidized beds with the specified layout of feed ports is discussed. (author)

Liu, Daoyin; Chen, Xiaoping [School of Energy and Environment, Southeast University, Nanjing 210096 (China)

2010-11-15T23:59:59.000Z

196

Tuning gain and bandwidth of traveling wave tubes using metamaterial beam-wave interaction structures  

SciTech Connect (OSTI)

We employ metamaterial beam-wave interaction structures for tuning the gain and bandwidth of short traveling wave tubes. The interaction structures are made from metal rings of uniform cross section, which are periodically deployed along the length of the traveling wave tube. The aspect ratio of the ring cross sections is adjusted to control both gain and bandwidth. The frequency of operation is controlled by the filling fraction of the ring cross section with respect to the size of the period cell.

Lipton, Robert, E-mail: lipton@math.lsu.edu; Polizzi, Anthony, E-mail: polizzi@math.lsu.edu [Department of Mathematics, Louisiana State University, Baton Rouge, Louisiana 70803-4918 (United States)

2014-10-14T23:59:59.000Z

197

A circuit for gain measurement of frequency referenced digitally self tuned filters  

E-Print Network [OSTI]

A CIRCUIT FOR GAIN MEASUREMENT OF FREQUENCY REFERENCED DIGITALLY SELF TUNED FILTERS A Thesis by ROBERT WAKE COOK Submitted to the Graduate College of Texas ASSAM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE December 1985 Major Subject: Electrical Engineering A CIRCUIT FOR GAIN MEASUREMENT OF FREQUENCY REFERENCED DIGITALLY SELF TUNED FILTERS A Thesis bv ROl3ERT WAKE COOK Approved as to style and content by: Dr. Randal! L. Geiger (Chairman...

Cook, Robert Wake

2012-06-07T23:59:59.000Z

198

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/or parasitic oscillation modes in a 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 to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy 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)

2011-02-22T23:59:59.000Z

199

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

200

Effects of finite gain-bandwidth products on switched capacitor filters  

E-Print Network [OSTI]

. 'vlav 198o Major Subject: Electrical Engineering EFFECTS OF FINITE GAIN-BANDWIDTH PRODUCTS ON SWITCHED CAPACITOR FILTERS A Thesis by FREDERIC D. MARCIANO Approved as to style and content by: o re E. Sanchez-Sinencio (Chairman of Committee... Chairman of Advisory Committee: Dr. E. Sanchez-Sinencio A methodology for the systematic study of the effects of finite gain-bandwidth products on switched capacitor filters is presented. The algorithms are established for a general structure comprising...

Marciano, Frederic D.

1985-01-01T23:59:59.000Z

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.


201

Room location (design) in accordance with the sol-air temperature and solar heat gain  

E-Print Network [OSTI]

ROOM LOCATION (DESIGN) IN ACCORDANCE WITH THE SOL-AIR TEMPERATURE AND SOLAR HEAT GAIN A Thesis GARY LYNN PORTER Submitted to the Graduate College of Texas ASM University in parital fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1977 Major Subject: Meteorology ROOM LOCATION (DESIGN) IN ACCORDANCE WITH THE SOL-AIR TEMPERATURE AND SOLAR HEAT GAIN A Thesis by GARY LYNN PORTER Approved as to style and content by: hairman of Committee) (Head of Department) ( (Q...

Porter, Gary Lynn

1977-01-01T23:59:59.000Z

202

The sign stability gain for the following closed loop sign stable State space representation of  

E-Print Network [OSTI]

well in as wide velocity range (v) as possible and in as wide changes in the road adhesion coefficient Capacity Variations Actuators (Inputs) WF36: Fuel Flow AE24 : Variable Bleed Valve STP25: Variable

Yedavalli, Rama K.

203

Materials with a desired refraction coefficient can be made by embedding small particles  

E-Print Network [OSTI]

A method is proposed to create materials with a desired refraction coefficient, possibly negative one. The method consists of embedding into a given material small particles. Given $n_0(x)$, the refraction coefficient of the original material in a bounded domain $D \\subset \\R^3$, and a desired refraction coefficient $n(x)$, one calculates the number $N(x)$ of small particles, to be embedded in $D$ around a point $x \\in D$ per unit volume of $D$, in order that the resulting new material has refraction coefficient $n(x)$.

A. G. Ramm

2007-06-15T23:59:59.000Z

204

E-Print Network 3.0 - absorption coefficient based Sample Search...  

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

67 Optical nonlinearity in low-temperature-grown GaAs: Microscopic limitations and optimization strategies Summary: is the absorption coefficient, d the physical thickness of the...

205

H Gain Scheduling for Discrete-Time Systems with Control Delays and Time-Varying Parameters: a BMI Approach  

E-Print Network [OSTI]

H Gain Scheduling for Discrete-Time Systems with Control Delays and Time-Varying Parameters: a BMI. By using a memory at the feedback loop, a discrete gain scheduled controller which minimizes an upper bound, there is no denying the fact that gain scheduling has represented an important issue within control system theory [1

206

Weakcontrast R/T coefficients in weakly anisotropic media: Pwave 9iFODY#9DYU\\XN  

E-Print Network [OSTI]

of transversely isotropic halfspaces. Zillmer, Gajewski & Kashtan (1998) derived PP reflection coefficient

Cerveny, Vlastislav

207

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

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

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

Sivaraman, Chitra; Flynn, Connor

208

Gain saturation studies in LG-750 and LG-770 amplifier glass  

SciTech Connect (OSTI)

Experiments were performed on the 100-J class Optical Sciences Laser (OSL) at LLNL to characterize the saturation fluence and small-signal gain of a solid-state Nd:glass amplifier utilizing LG-750 and LG-770, an amplifier glass developed for the National Ignition Facility (NIF). These high quality measurements of gain saturation at NIF level fluences, i.e., 10-15 J/cm{sup 2}, provide essential parameters for the amplifier performance codes used to design NIF and future high power laser systems. The small-signal gain, saturation fluence and square-pulse distortion were measured as a function of input fluence and pulse length in platinum-free LG-750 and LG-770. The input fluence, output fluence, small-signal gain and passive losses were measured to allow calculation of the saturation fluence. Least square fits of the output vs. input fluence data using a Frantz-Nodvik model was used to obtain an average saturation fluence for each data set. Overall, gain saturation in LG-750 and LG-770 is comparable at long pulse lengths. For shorter pulse length, < 5 ns, LG-770 exhibits a stronger pulse length dependence than LG-750, possibly due to a longer terminal level lifetime. LG-770 also has a higher cross- section, which is reflected by its slightly higher extraction efficiency. 52 refs., 11 figs., 2 tabs.

Pennington, D.M.; Milam, D.; Eimerl, D.

1997-03-10T23:59:59.000Z

209

Electro-optic coefficients of lithium tantalate at near-infrared wavelengths  

E-Print Network [OSTI]

Electro-optic coefficients of lithium tantalate at near-infrared wavelengths Joanna L. Casson April 27, 2004 The unclamped linear electro-optic coefficients r13 and r33 for lithium tantalate. In the unclamped mode the effects of mechanical changes caused by piezoelectric and elasto-optic effects

Gopalan, Venkatraman

210

Scaling of Heat Transfer Coefficients Along Louvered Fins A. C. Lyman1  

E-Print Network [OSTI]

1 Scaling of Heat Transfer Coefficients Along Louvered Fins A. C. Lyman1 , R. A. Stephan2 , and K 23681-2199 #12;2 Abstract Louvered fins provide a method for improving the heat transfer performance for evaluating the spatially-resolved louver heat transfer coefficients using various reference temperatures

Thole, Karen A.

211

Flow Boiling Heat Transfer Coefficient In Minichannels Correlation and Trends Satish G. Kandlikar  

E-Print Network [OSTI]

Flow Boiling Heat Transfer Coefficient In Minichannels ­ Correlation and Trends Satish G. Kandlikar York 14623, USA The flow boiling heat transfer in small diameter passages is being applied in many boiling heat transfer coefficient with the correlations developed for conventional channels. It is found

Kandlikar, Satish

212

A Rank-Corrected Procedure for Matrix Completion with Fixed Basis Coefficients  

E-Print Network [OSTI]

A Rank-Corrected Procedure for Matrix Completion with Fixed Basis Coefficients Weimin Miao, Shaohua address low-rank matrix completion problems with fixed basis coefficients, which include the low-rank correlation matrix completion in various fields such as the financial market and the low-rank density matrix

Chaudhuri, Sanjay

213

Empirical Distributions of DFT-Domain Speech Coefficients Based on Estimated Speech Variances  

E-Print Network [OSTI]

obtained from a short-time discrete Fourier transform (DFT) in the context of speech enhancement frameworks. The distribution of clean speech spectral coefficients is of great importance for speech enhancement algorithmsEmpirical Distributions of DFT-Domain Speech Coefficients Based on Estimated Speech Variances Timo

214

Demonstrations: blocks on planes, scales, to find coefficients of static and kinetic friction  

E-Print Network [OSTI]

Demonstrations: ·blocks on planes, scales, to find coefficients of static and kinetic friction Text: Fishbane 5-1, 5-2 Problems: 18, 21, 28, 30, 34 from Ch. 5 What's important: ·frictional forces ·coefficients of static and kinetic friction Friction Where objects move in contact with other objects, we know

Boal, David

215

Estimation of the inherent optical properties of natural waters from the irradiance attenuation coefficient and  

E-Print Network [OSTI]

Estimation of the inherent optical properties of natural waters from the irradiance attenuation, and the backscattering bb coefficients in the upper ocean from irradiance reflectance just beneath the sea surface, R 0 , and the average attenuation coefficient for downwelling irradiance, Kd 1, between the surface and the first

Stramski, Dariusz

216

Asymptotic normalization coefficients and the Be-7(p, gamma)B-8 astrophysical S factor  

E-Print Network [OSTI]

We consider the results of two proton transfer reactions, B-10(Be-7, B-8)Be-9 and N-14(Be-7, B-8)C-13, to obtain a weighted average of the measured asymptotic normalization coefficients for the virtual transition 7Be +pB-8. These coefficients...

Azhari, A.; Burjan, V.; Carstoiu, F.; Gagliardi, Carl A.; Kroha, V.; Mukhamedzhanov, AM; Nunes, FM; Tang, X.; Trache, L.; Tribble, Robert E.

2001-01-01T23:59:59.000Z

217

Model equations in rarefied gas dynamics: Viscous-slip and thermal-slip coefficients  

E-Print Network [OSTI]

Model equations in rarefied gas dynamics: Viscous-slip and thermal-slip coefficients C. E. Siewert-slip and the thermal-slip coefficients in rarefied gas dynamics. More specifically, the BGK model, the S model In reviewing numerous papers devoted to model equa- tions in rarefied gas dynamics, we have found no definitive

Siewert, Charles E.

218

Gain dynamics of quantum dot devices for dual-state operation  

SciTech Connect (OSTI)

Ground state gain dynamics of In(Ga)As-quantum dot excited state lasers are investigated via single-color ultrafast pump-probe spectroscopy below and above lasing threshold. Two-color pump-probe experiments are used to localize lasing and non-lasing quantum dots within the inhomogeneously broadened ground state. Single-color results yield similar gain recovery rates of the ground state for lasing and non-lasing quantum dots decreasing from 6 ps to 2 ps with increasing injection current. We find that ground state gain dynamics are influenced solely by the injection current and unaffected by laser operation of the excited state. This independence is promising for dual-state operation schemes in quantum dot based optoelectronic devices.

Kaptan, Y., E-mail: yuecel.kaptan@physik.tu-berlin.de; Herzog, B.; Kolarczik, M.; Owschimikow, N.; Woggon, U. [Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin (Germany); Schmeckebier, H.; Arsenijevi?, D.; Bimberg, D. [Institut für Festkörperphysik, Technische Universität Berlin, Berlin (Germany); Mikhelashvili, V.; Eisenstein, G. [Technion Institute of Technology, Faculty of Electrical Engineering, Haifa (Israel)

2014-06-30T23:59:59.000Z

219

Building accurate initial models using gain functions for waveform inversion in the Laplace domain  

E-Print Network [OSTI]

We suggest an initial model building technique using time gain functions in the Laplace domain. Applying the gain expressed as a power of time is equivalent to taking the partial derivative of the Laplace-domain wavefield with respect to a damping constant. We construct an objective function, which minimizes the logarithmic differences between the gained field data and the partial derivative of the modeled data with respect to the damping constant. We calculate the modeled wavefield, the partial derivative wavefield, and the gradient direction in the Laplace domain using the analytic Green's function starting from a constant velocity model. This is an efficient method to generate an accurate initial model for a following Laplace-domain inversion. Numerical examples using two marine field datasets confirm that a starting model updated once from a scratch using the gradient direction calculated with the proposed method can be successfully used for a subsequent Laplace-domain inversion.

Wansoo Ha; Changsoo Shin

2014-08-20T23:59:59.000Z

220

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

SciTech Connect (OSTI)

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

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

FEL and Optical Klystron Gain for an Electron Beam with Oscillatory Energy Distribution  

SciTech Connect (OSTI)

If the energy spread of a beam is larger then the Pierce parameter, the FEL gain length increases dramatically and the FEL output gets suppressed. We show that if the energy distribution of such a beam is made oscillatory on a small scale, the gain length can be considerably decreased. Such an oscillatory energy distribution is generated by first modulating the beam energy with a laser via the mechanism of inverse FEL, and then sending it through a strong chicane. We show that this approach also works for the optical klystron enhancement scheme. Our analytical results are corroborated by numerical simulations.

Stupakov, G.; Ding, Y.; Huang, Z.; /SLAC

2009-12-09T23:59:59.000Z

222

High Average Power Laser Gain Medium With Low Optical Distortion Using A Transverse Flowing Liquid Host  

DOE Patents [OSTI]

A high average power, low optical distortion laser gain media is based on a flowing liquid media. A diode laser pumping device with tailored irradiance excites the laser active atom, ion or molecule within the liquid media. A laser active component of the liquid media exhibits energy storage times longer than or comparable to the thermal optical response time of the liquid. A circulation system that provides a closed loop for mixing and circulating the lasing liquid into and out of the optical cavity includes a pump, a diffuser, and a heat exchanger. A liquid flow gain cell includes flow straighteners and flow channel compression.

Comaskey, Brian J. (Walnut Creek, CA); Ault, Earl R. (Livermore, CA); Kuklo, Thomas C. (Oakdale, CA)

2005-07-05T23:59:59.000Z

223

Long wavelength, high gain InAsSb strained-layer superlattice photoconductive detectors  

DOE Patents [OSTI]

A high gain photoconductive device for 8 to 12 .mu.m wavelength radiation including an active semiconductor region extending from a substrate to an exposed face, the region comprising a strained-layer superlattice of alternating layers of two different InAs.sub.1-x Sb.sub.x compounds having x>0.75. A pair of spaced electrodes are provided on the exposed face, and changes in 8 to 12 .mu.m radiation on the exposed face cause a large photoconductive gain between the spaced electrodes.

Biefeld, Robert M. (Albuquerque, NM); Dawson, L. Ralph (Albuquerque, NM); Fritz, Ian J. (Albuquerque, NM); Kurtz, Steven R. (Albuquerque, NM); Zipperian, Thomas E. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

224

Extraction of the symmetry energy coefficients from the masses differences of isobaric nuclei  

E-Print Network [OSTI]

The nuclear symmetry energy coefficients of finite nuclei are extracted by using the differences between the masses of isobaric nuclei. Based on the masses of more than 2400 nuclei with $A=9-270$, we investigate the model dependence in the extraction of symmetry energy coefficient. We find that the extraction of the symmetry energy coefficients is strongly correlated with the forms of the Coulomb energy and the mass dependence of the symmetry energy coefficient adopted. The values of the extracted symmetry energy coefficients increase by about 2 MeV for heavy nuclei when the Coulomb correction term is involved. We obtain the bulk symmetry energy coefficient $S_0=28.26\\pm1.3$ MeV and the surface-to-volume ratio $\\kappa=1.26\\pm 0.25 $ MeV if assuming the mass dependence of symmetry energy coefficient $a_{\\rm sym}(A)=S_0(1-\\kappa/A^{1/3})$, and $S_0=32.80\\pm1.7$ MeV, $\\kappa=2.82\\pm0.57$ MeV when $a_{\\rm sym}(A)=S_0 (1+\\kappa/A^{1/3})^{-1}$ is adopted.

Junlong Tian; Haitao Cui; Kuankuan Zheng; Ning Wang

2014-03-28T23:59:59.000Z

225

Comparative study of methods used to estimate ionic diffusion coefficients using migration tests  

SciTech Connect (OSTI)

Ionic diffusion coefficients are estimated rapidly using electromigration tests. In this paper, electromigration tests are accurately simulated by numerically solving the Nernst-Planck (NP) equation (coupled with the electroneutrality condition (EN)) using the finite element method. Numerical simulations are validated against experimental data obtained elsewhere [E. Samson, J. Marchand, K.A. Snyder, Calculation of ionic diffusion coefficients on the basis of migration test results, Materials and Structures/Materiaux et Constructions 36 (257) (2003) 156-165., H. Friedmann, O. Amiri, A. Ait-Mokhtar, A direct method for determining chloride diffusion coefficient by using migration test, Cement and Concrete Research 34 (11) (2004) 1967-1973.]. It is shown that migration due to the non-linear electric potential completely overwhelms diffusion due to concentration gradients. The effects of different applied voltage differences and chloride source concentrations on estimations of chloride diffusion coefficients are explored. We show that the pore fluid within concrete and mortar specimens generally differs from the curing solution, lowering the apparent diffusion coefficient, primarily due to interactions of chloride ions with other ions in the pore fluid. We show that the variation of source chloride concentration strongly affects the estimation of diffusion coefficients in non-steady-state tests; however this effect vanishes under steady-state conditions. Most importantly, a comparison of diffusion coefficients obtained from sophisticated analyses (i.e., NP-EN) and a variety of commonly used simplifying methods to estimate chloride diffusion coefficients allows us to identify those methods and experimental conditions where both approaches deliver good estimates for chloride diffusion coefficients. Finally, we demonstrate why simultaneous use and monitoring of current density and fluxes are recommended for both the non-steady and steady-state migration tests.

Narsilio, G.A. [Department of Civil and Environmental Engineering, School of Engineering, University of Melbourne, Victoria 3010 (Australia)], E-mail: narsilio@unimelb.edu.au; Li, R. [Department of Civil and Environmental Engineering, School of Engineering, University of Melbourne, Victoria 3010 (Australia); Institute of Geotechnical Engineering, Southeast University (SEU), Nanjing, Jiangsu (China)], E-mail: lirenmin@seu.edu.cn; Pivonka, P. [Department of Civil and Environmental Engineering, School of Engineering, University of Melbourne, Victoria 3010 (Australia)], E-mail: ppivonka@unimelb.edu.au; Smith, D.W. [Department of Civil and Environmental Engineering, School of Engineering, University of Melbourne, Victoria 3010 (Australia)], E-mail: david.smith@unimelb.edu.au

2007-08-15T23:59:59.000Z

226

Neural Computation 9, 971983 (1997) Physiological Gain Leads to High ISI Variability in  

E-Print Network [OSTI]

Neural Computation 9, 971­983 (1997) Physiological Gain Leads to High ISI Variability in a Simple@phy.ucsf.edu, ken@phy.ucsf.edu Abstract To understand the interspike interval (ISI) variability displayed by visual that have previously been proposed. When ISI's are dominated by post­spike recovery, 1= p N arguments hold

Columbia University

227

CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors  

E-Print Network [OSTI]

1 CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors J. S' in photodiodes used in active pixel sensor. The discussion is based on experimental data from contact diffusion (n+ pepi) photodiodes fabricated on a standard 0.35 µm CMOS technology. I. Introduction The readout

Hornsey, Richard

228

The physics issues that determine inertial confinement fusion target gain and driver requirements: A tutorial*  

E-Print Network [OSTI]

The physics issues that determine inertial confinement fusion target gain and driver requirements ``bookkeeping'' of input parametrized by ICF drivers' coupling efficiencies to the target, and subsequent requirements will be discussed for both the direct drive driver impinging directly on the target and indirect

229

Delivering pump light to a laser gain element while maintaining access to the laser beam  

DOE Patents [OSTI]

A lens duct is used for pump delivery and the laser beam is accessed through an additional component called the intermediate beam extractor which can be implemented as part of the gain element, part of the lens duct or a separate component entirely.

Beach, Raymond J. (Livermore, CA); Honea, Eric C. (Sunol, CA); Payne, Stephen A. (Castro Valley, CA)

2001-01-01T23:59:59.000Z

230

Gain and Equalization Adaptation to Optimize the Vertical Eye Opening in a Wireline Receiver  

E-Print Network [OSTI]

loss and skin-effect can severely limit a wireline receiver's ability to operate at high-speeds, Toronto, Ontario, Canada Abstract--A strategy for the adaptation of an equalizer and variable gain amplifier is presented. Both control signals are generated by examining the probability density function

Chan Carusone, Tony

231

Daily routines of body mass gain in birds: 2. An experiment with reduced food availability  

E-Print Network [OSTI]

; published online 31 July 2006; MS. number: 8608R) Theoretical models predict that small birds should adjust daily patterns of body mass gain in response to environmental and internal factors. In a companion paper, we described a model on daily fattening that allows the analysis of precise changes in the shape

Carrascal, Luis M.

232

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

Boyer, Edmond

233

Gain Scheduled Control of a Solar Power Plant Tor A. Johansen1  

E-Print Network [OSTI]

Gain Scheduled Control of a Solar Power Plant Tor A. Johansen1 , Kenneth J. Hunt2 and Idar Petersen to a pilot-scale solar power plant is described. A eld of parabolic collectors focus the solar radiation onto a tube where oil is pumped through in order to collect the solar power. The control problem is to keep

Johansen, Tor Arne

234

Why help in this way? Insights gained from an approachable contact  

E-Print Network [OSTI]

Why help in this way? Insights gained from an approachable contact within an organisation can make to a student query when you feel able to help by sharing your experiences and offering advice. How do I become for Rolls-Royce in helping us to secure the best graduate talent but having helped 3 Lancaster students

Diggle, Peter J.

235

Trade and plant level productivity gains: Role of Import Liberalisation, Technological Spillovers and Variety Growth in  

E-Print Network [OSTI]

1 Trade and plant level productivity gains: Role of Import Liberalisation, Technological Spillovers liberalization impact productivity at the micro level in the economy? Using a panel data of Indian manufacturing productivity growth at the production level in the economy. These mechanisms include trade induced pro

Bandyopadhyay, Antar

236

The Maroon and White Game: A simulation of trust and long-term gains and losses  

E-Print Network [OSTI]

to players the advantages of systems thinking, as opposed to sub-optimization, during a live playing of the game. Although effective in illustrating the greater mathematic gains incurred from systems thinking to a community-at-large, the simulation might...

Smith, James P.; Rybkowski, Zofia K.

2013-07-31T23:59:59.000Z

237

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

238

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

239

High-gain weakly nonlinear flux-modulated Josephson parametric amplifier using a SQUID-array  

E-Print Network [OSTI]

Chalmers University of Technology, S-41296 Goteborg, Sweden. (Dated: June 20, 2014) Abstract We have gain satu- ration at extremely low input power. A strong effort is thus made to increase the bandwidth modulates this nonlinear inductance at 2P , and is responsible for a four-wave mixing such that 2P = S + I

Boyer, Edmond

240

Solar Heat Gain through a Skylight in a Light Well J. H. Klems  

E-Print Network [OSTI]

Solar Heat Gain through a Skylight in a Light Well J. H. Klems Building Technologies Department on a skylight mounted on a light well of significant depth are presented. It is shown that during the day much of the solar energy that strikes the walls of the well does not reach the space below. Instead, this energy

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

Bounds on the Gain of Network Coding and Broadcasting in Wireless Networks  

E-Print Network [OSTI]

1 Bounds on the Gain of Network Coding and Broadcasting in Wireless Networks Junning Liu , Dennis the possibility of network coding and broadcasting in their model, and recent work has suggested network coding and broadcasting in a )10 random topology that the throughput scales as ¥§¦¨¤©2

Massachusetts at Amherst, University of

242

Gain assisted propagation of surface plasmon polaritons on planar metallic waveguides  

E-Print Network [OSTI]

and optical gain in InGaAsP quantum well lasers," Semiconductors 36, 344-353 (2002). 17. S. Y. Hu, D. B. Young compensate for the absorption losses in the metal. The conditions for existence of a surface plasmon

Fainman, Yeshaiahu

243

Gain Improvement of Er-doped Amplifiers for the Feedback Filters  

E-Print Network [OSTI]

contrast between these two materials and the electro-optical properties of Ti: LiNbO3. Furthermore, waveguide gain is introduced through selective surface erbium (Er) doping which yields high quality loss-compensated or even amplifying waveguides without...

Song, Xiaomin

2012-02-14T23:59:59.000Z

244

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture  

E-Print Network [OSTI]

Optimization of stomatal conductance for maximum carbon gain under dynamic soil moisture Stefano Accepted 26 September 2013 Available online 9 October 2013 Keywords: Optimization Photosynthesis Soil moisture Stomatal conductance Transpiration a b s t r a c t Optimization theories explain a variety

Katul, Gabriel

245

Enhancement of sensitivity gain and frequency tuning by coupling of active hair bundles  

E-Print Network [OSTI]

Enhancement of sensitivity gain and frequency tuning by coupling of active hair bundles Kai Dierkes. A candidate for this process is active hair bundle mechanics observed, for instance, for hair cells of the bullfrog's sacculus. Hair bundles in various inner ear organs are coupled by overlying membranes. Using

Jülicher, Frank

246

Electron Excitation Coefficients in Helium, Neon, Oxygen and Methane at High E/N  

SciTech Connect (OSTI)

Swarm analysis is performed by comparing experimental and calculated transport coefficients. Comparisons are repeated until a satisfactory agreement is achieved after modifications of the cross sections. We have made an analysis of our excitation coefficient data for neon and methane by using detailed Monte Carlo simulation scheme. In this work we also present experimental electron excitation coefficients for other gases: helium, neon and oxygen. We used a drift tube technique to measure the absolute emission intensities in low current self sustained Townsend type discharges.

Nikitovic, Zeljka D. [Institute of Physics, P.O.B. 68, 11080 Belgrade (Serbia and Montenegro)

2006-12-01T23:59:59.000Z

247

Continuous dependence on the coefficients for a class of non-autonomous evolutionary equations  

E-Print Network [OSTI]

The continuous dependence of solutions to certain (non-autonomous, partial, integro-differential-algebraic, evolutionary) equations on the coefficients is addressed. We give criteria that guarantee that convergence of the coefficients in the weak operator topology implies weak convergence of the respective solutions. We treat three examples: A homogenization problem for a Kelvin-Voigt model for elasticity, the discussion of continuous dependence of the coefficients for acoustic waves with impedance type boundary conditions and a singular perturbation problem for a mixed type equation. By means of counter examples we show optimality of the results obtained.

Marcus Waurick

2014-02-24T23:59:59.000Z

248

Using first principles Destiny Functional Theory methods to model the Seebeck coefficient of bulk silicon  

E-Print Network [OSTI]

Thermoelectrics are gaining significant amounts of attention considering their relevance today in the areas of sustainable energy generation and energy efficiency. In this thesis, the thermoelectric properties of bulk ...

Mehra, Saahil

2008-01-01T23:59:59.000Z

249

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

250

Modeling Infinite Dilution and Fickian Diffusion Coefficients of Carbon Dioxide in Water  

E-Print Network [OSTI]

in enhanced oil recovery (EOR), and recovery of coal-bed methane from unmineable coal seams.3 For CO2 these temperature and pressure conditions. A general formalism for Fickian diffusion coefficients is already well

Firoozabadi, Abbas

251

Identification of dynamic force coefficients of a labyrinth and gas damper seal using impact load excitations  

E-Print Network [OSTI]

, and the seal displacement and acceleration time responses in two orthogonal directions are measured. A frequency domain parameter identification procedure allows the determination of the seals' dynamic force coefficients over a frequency range. Tests are made...

Ransom, David Lawrence

1997-01-01T23:59:59.000Z

252

Identification of force coefficients in flexible rotor-bearing systems - enhancements and further validations  

E-Print Network [OSTI]

identification of bearing force parameters, i.e. stiffness and damping coefficients, is one of the most difficult to achieve. Field identification by imbalance response measurements is a simple and often reliable way to determine synchronous speed force...

Balantrapu, Achuta Kishore Rama Krishna

2005-11-01T23:59:59.000Z

253

Identification of Force Coefficients in Two Squeeze Film Dampers with a Central Groove  

E-Print Network [OSTI]

frequency over the frequency range of the tests. Predictions derived from a novel SFD computational tool that includes flow interactions in the central groove and oil supply orifices agree well with the experimental force coefficients for both dampers...

Seshagiri, Sanjeev

2012-07-16T23:59:59.000Z

254

Sediment-Water Partition Coefficients of Hydrophobic Persistent Organic Pollutants (POPs)  

E-Print Network [OSTI]

Sediment-Water Partition Coefficients of Hydrophobic Persistent Organic Pollutants (POPs) for Different Sediments with Passive Sampler Benoit Charrasse (benoit.charrasse@ineris.fr) and Pierre Hennebert aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) were determined in sediments from five

Paris-Sud XI, Université de

255

ErAs/InGaAs superlattice Seebeck coefficient Gehong Zeng, John E. Bowers  

E-Print Network [OSTI]

material, and the output power of thermal-to- electricity power generator is proportional to the square or generators. For TE coolers, the cooling power is proportional to the Seebeck coefficient of the element

Bowers, John

256

Modeling of activity coefficients of aqueous solutions of quaternary ammonium salts with the  

E-Print Network [OSTI]

with the electrolyte-NRTL equation Lionel S. Belvèze, Joan F. Brennecke* and Mark A. Stadtherr Department of Chemical-liquid (NRTL) model proposed by Chen et al.,1 can be applied to model activity coefficients of quaternary

Stadtherr, Mark A.

257

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

SciTech Connect (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

258

E-Print Network 3.0 - accurate long-range coefficients Sample...  

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

in Journal of Statistical Planning and Inference A critical look at Lo's modified RS statistic Lambdayz Summary: )-coefficient, OE 0:5; 0:9, and 5 different values for the...

259

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

E-Print Network [OSTI]

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...

Sharma, Ashish

2001-01-01T23:59:59.000Z

260

Limiting diffusion coefficients of heavy molecular weight organic contaminants in supercritical carbon dioxide  

E-Print Network [OSTI]

LIMITING DIFFUSION COEFFICIENTS OF HEAVY MOLECULAR WEIGHT ORGANIC CONTAMINANTS IN SUPERCRITICAL CARBON DIOXIDE A Thesis by MAURICIO OREJUELA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1994 Major Subject: Chemical Engineering LIMITING DIFFUSION COEFFICIENTS OF HEAVY MOLECULAR WEIGHT ORGANIC CONTAMINANTS IN SUPERCRITICAL CARBON DIOXIDE A Thesis by MAURICIO OREJUELA Submitted...

Orejuela, Mauricio

1994-01-01T23:59:59.000Z

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.


261

Operational factorization of the linear second-order differential equation with variable coefficients  

E-Print Network [OSTI]

OPERATIONAL FACTORIZATION OF THE LINEAR SECOND-ORDER DIFFERENTIAL EQUATION WITH VARIABLE COEFFICIENTS A Thesis By LARRY MORTON AUSTIN Submitted to the Graduate College of the Texas ASM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1966 Major Subject: Mathematics OPERATIONAL FACTORIZATION OF THE LINEAR SECOND-ORDER DIFFERENTIAL EQUATION WITH VARIABLE COEFFICIENTS A Thesis By LARRY MORTON AUSTIN Approved as to style and content by: (Ch rman...

Austin, Larry Morton

1966-01-01T23:59:59.000Z

262

Identification of force coefficients in a squeeze film damper with a mechanical seal  

E-Print Network [OSTI]

IDENTIFICATION OF FORCE COEFFICIENTS IN A SQUEEZE FILM DAMPER WITH A MECHANICAL SEAL A Thesis by ADOLFO DELGADO-MARQUEZ Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2005 Major Subject: Mechanical Engineering IDENTIFICATION OF FORCE COEFFICIENTS IN A SQUEEZE FILM DAMPER WITH A MECHANICAL SEAL A Thesis by ADOLFO DELGADO...

Delgado-Marquez, Adolfo

2006-04-12T23:59:59.000Z

263

Effect of surfactant on evaporative heat transfer coefficients in vertical film forced convection  

E-Print Network [OSTI]

for different concentrations of surfactant (log-log scale) (Boiling liquid flow rate of 1. 025 gpm) Evaporative coefficient as function of tempera- ture drop over the liquid film for different concentrations of surfactant (log-log scale) (Boiling liquid... flow rate of 1. 275 gpm) Evaporative coefficient as function of tempera- ture drop over the liquid film for different concentrations of surfactant (log-log scale) (Boiling liquid flow rate of 1. 55 gpm) 47 84 85 86 87 10 Evaporative...

Shah, Basit Husain

1972-01-01T23:59:59.000Z

264

Indirect methods of determination of the asymptotic normalization coefficients and their application for nuclear astrophysics  

SciTech Connect (OSTI)

The basic methods of the determination of asymptotic normalization coefficient for A+a?B of astrophysical interest are briefly presented. The results of the application of the specific asymptotic normalization coefficients derived within these methods for the extrapolation of the astrophysical S factors to experimentally inaccessible energy regions (E ? 25 keV) for the some specific radiative capture A(a,?)B reactions of the pp-chain and the CNO cycle are presented.

Yarmukhamedov, R. [Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, 100214 Tashkent (Uzbekistan)

2014-05-09T23:59:59.000Z

265

An experimental and theoretical comparison of rotordynamic coefficients for sawtooth-pattern damper seals  

E-Print Network [OSTI]

AN EXPERIMENTAL AND THEORETICAL COMPARISON OF ROTORDYNAMIC COEFFICIENTS FOR SAWTOOTH-PATTERN DAMPER SEALS A Thesis by STEVEN ANTHONY NOLAN Submitted to the Graduate College of Texas AlkM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May &9BT Major Subject: Mechanical Engineering AN EXPERIMENTAL AND THEORETICAL COMPARISON OF ROTORDYNAMIC COEFFICIENTS FOR SAWTOOTH-PATTERN DAMPER SEALS A Thesis by STEVEN ANTHONY NOLAN Approved as to style...

Nolan, Steven Anthony

1987-01-01T23:59:59.000Z

266

A comparison of Lagrangian inertia coefficients for robot manipulator dynamics to examine real-time applicability  

E-Print Network [OSTI]

A COMPARISON OF LAGRANGIAN INERTIA COEFFICIENTS FOR ROBOT MANIPULATOR DYNAMICS TO EXAMINE REAL-TIME APPLICABILITY A Thesis by GERALD PAUL ROSTON Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1985 Major Subject: Mechanical Engineering A COMPARISON OF LAGRANGIAN INERTIA COEFFICIENTS FOR ROBOT MANIPULATOR DYiNAMICS TO EXAMINE REAL-TIME APPLICABILITY A Thesis by GERALD PAUL ROSTON...

Roston, Gerald Paul

1985-01-01T23:59:59.000Z

267

Experimental measurements and methods for data analysis to determine the rotordynamic coefficients of a labyrinth seal  

E-Print Network [OSTI]

subsynchronous instability, which means that rotor whirl occurs at a frequency less than the rotating speed with amplitudes which grow as running speed increases. Synchronous response of high pressure turbines, compressors and other rotating machinery can also... equation turns out to be overdetermined. The present method consists of two parts; one a part to identify the rotor support properties - stifFness and damping coefficients of roller bearings, and the other a part to identify seal force coefficients...

Choi, Sang Kyu

1988-01-01T23:59:59.000Z

268

Friction coefficients of sorghum grain on steel, teflon, and concrete surfaces  

E-Print Network [OSTI]

FRICTION COEFFICIENTS OF SORGHUM GRAIN ON STEEL, TEFLON, AND CONCRETE SURFACES A Thesis By QUAZI ANWAR HOSSAIN Submitted to the Graduate College of the Texas A6M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE January 1967 Major Subject: Agricultural Engineering FRICTION COEFFICIENTS OF SORGHUM GRMN ON STEEL, TEFLON, AND CONCRETE SURFACES A Thesis By QUAZI ANWAR HOSSAIN Approved as to style and content by: (Chairma Com ' ee) ead o D'epart nt...

Hossain, Quazi A

1967-01-01T23:59:59.000Z

269

Non-local thermodynamic equilibrium effects on isentropic coefficient in argon and helium thermal plasmas  

SciTech Connect (OSTI)

In the present work, two cases of thermal plasma have been considered; the ground state plasma in which all the atoms and ions are assumed to be in the ground state and the excited state plasma in which atoms and ions are distributed over various possible excited states. The variation of Z?, frozen isentropic coefficient and the isentropic coefficient with degree of ionization and non-equilibrium parameter ?(= T{sub e}/T{sub h}) has been investigated for the ground and excited state helium and argon plasmas at pressures 1?atm, 10?atm, and 100?atm in the temperature range from 6000?K to 60?000?K. For a given value of non-equilibrium parameter, the relationship of Z? with degree of ionization does not show any dependence on electronically excited states in helium plasma whereas in case of argon plasma this dependence is not appreciable till degree of ionization approaches 2. The minima of frozen isentropic coefficient shifts toward lower temperature with increase of non-equilibrium parameter for both the helium and argon plasmas. The lowering of non-equilibrium parameter decreases the frozen isentropic coefficient more emphatically in helium plasma at high pressures in comparison to argon plasma. The increase of pressure slightly reduces the ionization range over which isentropic coefficient almost remains constant and it does not affect appreciably the dependence of isentropic coefficient on non-equilibrium parameter.

Sharma, Rohit [Satyam Institute of Engineering and Technology, Amritsar 143107 (India)] [Satyam Institute of Engineering and Technology, Amritsar 143107 (India); Singh, Kuldip [Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)] [Department of Physics, Guru Nanak Dev University, Amritsar 143005 (India)

2014-03-15T23:59:59.000Z

270

The design of a test rig for the identification of dynamic coefficients of a high temperature magnetic bearing  

E-Print Network [OSTI]

This thesis is a report on the research and Micrographics. development to design a test rig for the identification of the dynamic coefficients of a radial magnetic bearing. The test rig development is intended for dynamic coefficient observation...

Rahtika, I Putu Gede Sopan

1998-01-01T23:59:59.000Z

271

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

SciTech Connect (OSTI)

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

272

Gain, directionality and noise in microwave SQUID amplifiers: Input-output approach  

E-Print Network [OSTI]

We present a new theoretical framework to analyze microwave amplifiers based on the dc SQUID. Our analysis applies input-output theory generalized for Josephson junction devices biased in the running state. Using this approach we express the high frequency dynamics of the SQUID as a scattering between the participating modes. This enables us to elucidate the inherently nonreciprocal nature of gain as a function of bias current and input frequency. This method can, in principle, accommodate an arbitrary number of Josephson harmonics generated in the running state of the junction. We report detailed calculations taking into account the first few harmonics that provide simple semi-quantitative results showing a degradation of gain, directionality and noise of the device as a function of increasing signal frequency. We also discuss the fundamental limits on device performance and applications of this formalism to real devices.

Archana Kamal; John Clarke; Michel Devoret

2012-06-20T23:59:59.000Z

273

Quantum noise of white light cavity using double-pumped gain medium  

E-Print Network [OSTI]

Laser interferometric gravitational-wave detectors implement Fabry-Perot cavities to increase their peak sensitivity. However, this is at cost of reducing their detection bandwidth, which origins from the propagation phase delay of the light. The "white-light-cavity" idea, first proposed by Wicht et al. [Optics Communications 134, 431 (1997)], is to circumvent this limitation by introducing anomalous dispersion, using double-pumped gain medium, to compensate for such phase delay. In this article, starting from the Hamiltonian of atom-light interaction, we apply the input-output formalism to evaluate the quantum noise of the system. We find that apart from the additional noise associated with the parametric amplification process noticed by others, the stability condition for the entire system poses an additional constraint. Through surveying the parameter regimes where the gain medium remains stable (not lasing) and stationary, we find that there is no net enhancement of the shot-noise limited sensitivity. The...

Ma, Yiqiu; Zhao, Chunnong; Chen, Yanbei

2015-01-01T23:59:59.000Z

274

Robust random number generation using steady-state emission of gain-switched laser diodes  

SciTech Connect (OSTI)

We demonstrate robust, high-speed random number generation using interference of the steady-state emission of guaranteed random phases, obtained through gain-switching a semiconductor laser diode. Steady-state emission tolerates large temporal pulse misalignments and therefore significantly improves the interference quality. Using an 8-bit digitizer followed by a finite-impulse-response unbiasing algorithm, we achieve random number generation rates of 8 and 20?Gb/s, for laser repetition rates of 1 and 2.5?GHz, respectively, with a ±20% tolerance in the interferometer differential delay. We also report a generation rate of 80?Gb/s using partially phase-correlated short pulses. In relation to the field of quantum key distribution, our results confirm the gain-switched laser diode as a suitable light source, capable of providing phase-randomized coherent pulses at a clock rate of up to 2.5?GHz.

Yuan, Z. L., E-mail: zhiliang.yuan@crl.toshiba.co.uk; Lucamarini, M.; Dynes, J. F.; Fröhlich, B.; Plews, A.; Shields, A. J. [Toshiba Research Europe Limited, Cambridge Research Laboratory, 208 Cambridge Science Park, Milton Road, Cambridge CB4 0GZ (United Kingdom)

2014-06-30T23:59:59.000Z

275

International Journal of Structural Changes in Solids (IJSCS), 2, N2, (2010), Materials with a desired refraction coefficient can  

E-Print Network [OSTI]

and discussed. The desired refraction coefficient can be complex-valued. This means that the enrgy absorption

276

Materials with a desired refraction coefficient can be created by embedding small particles into a given material  

E-Print Network [OSTI]

coefficient can be complex-valued. This means that the enrgy absorption in the new material can also

277

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

E-Print Network [OSTI]

. At 30 and 50'C, the partition coefficient for acetaldehyde was lowest at 9% SNF regardless of milk fat concentration or temperature of analysis. The partition coefficient of acetaldehyde decreased as the concentration of the flavor compound increased... with increasing concentration of milk fat and diacetyl. Guar gum did not affect the partition coefficients of the flavor compounds under any experimental condition. Partition coefficients for ethanol and diacetyl were similar at 30'C, however, at 5(PC...

Lo, Chih-Yang

1992-01-01T23:59:59.000Z

278

High gain, Fast Scan, Broad Spectrum Parallel Beam Wavelength Dispersive X-ray Spectrometer for SEM  

SciTech Connect (OSTI)

During contract # DE-FG02-ER83545, Parallax Research, Inc. developed a High gain, Fast Scan Broad Spectrum Parallel beam Wavelength Dispersive X-ray Spectrometer for use on Scanning Electron Microscopes (SEM). This new spectrometer allows very fast high resolution elemental analysis of samples in an electron microscope. By comparison to previous WDS spectrometers, it can change from one energy position to another very quickly and has an extended range compared to some similar products.

OHara, David

2009-05-08T23:59:59.000Z

279

High Gain, Fast Scan, Broad Spectrum, Parallel Beam Wavelength Dispersive X-ray Spectrometer for SEM  

SciTech Connect (OSTI)

Parallax Research, Inc. proposes to produce a new type of x-ray spectrometer for use with Scanning Electron Microscopy (SEM) that would have the energy resolution of WDS and the ease of use of EDS with sufficient gain for lower energies that it can be used at low beam currents as is EDS. Parallax proposes to do this by development of new multiple reflection x-ray collimation optics, new diffractor technology, new detector technology and new scan algorithms.

David OHara; Dr. Eric Lochmer

2003-09-12T23:59:59.000Z

280

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

SciTech Connect (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 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

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

Gain scheduling adaptive control strategies for HVDC systems to accommodate large disturbances  

SciTech Connect (OSTI)

Techniques have been developed to permit the response of the controls for dc transmission systems to adapt to large system changes. A gain scheduling approach tunes the control as an on-line function of the effective short-circuit ratio and contingency indicators. The method has been tested by digital simulation, based on EMTP, of a back-to-back dc system. It has been found to be robust and control performance has been enhanced.

Reeve, J.; Sultan, M. (Univ. of Waterloo, Ontario (Canada))

1994-02-01T23:59:59.000Z

282

Prediction of internal temperature swings in direct-gain passive-solar buildings  

SciTech Connect (OSTI)

The diurnal heat capacity method is presented for estimating inside-temperature swings attributable to direct winter solar gain. The procedures are simplified to be suitable for hand analysis, aided by tables of diurnal heat capacity for various materials. The method has been spot checked against computer simulation and has been used successfully by a group of 20 builders in New Mexico to analyze whether temperature swings would be excessive in their designs.

Balcomb, J.D.

1983-01-01T23:59:59.000Z

283

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

SciTech Connect (OSTI)

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

284

HELPING BEHAVIOUR DURING COOPERATIVE LEARNING AND LEARNING GAINS: THE ROLE OF THE TEACHER AND OF PUPILS' PRIOR KNOWLEDGE AND ETHNIC  

E-Print Network [OSTI]

1 HELPING BEHAVIOUR DURING COOPERATIVE LEARNING AND LEARNING GAINS: THE ROLE OF THE TEACHER, J. W. (2008). Helping behaviour during cooperative learning and learning gains: The role-159" #12;2 Running head: Helping behaviour during cooperative learning Helping behaviour during cooperative

Paris-Sud XI, Université de

285

Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain applications  

E-Print Network [OSTI]

Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain: Raman scattering; Neutron scattering; Raman gain; Boson peak We present measurements of the vibrational, extracted from specific-heat or neutron scattering measurements [7,8]. Only very recently two of the present

Schirmacher, Walter

286

Abstract--A simple method is presented to reduce the number of scheduling parameters for gain-scheduled  

E-Print Network [OSTI]

to a zero- parameter or LTI controller design problem in the dimensionless domain. The dimensionless gain-scheduling. Index Terms--Gain scheduling, gantry control, pi theorem, dimensionless parameters, nondimensional representation I. INTRODUCTION AIN scheduling is a popular method to control systems whose linearized model

Brennan, Sean

287

Equation of state at finite net-baryon density using Taylor coefficients up to sixth order  

E-Print Network [OSTI]

We employ the lattice QCD data on Taylor expansion coefficients up to sixth order to construct an equation of state at finite net-baryon density. When we take into account how hadron masses depend on lattice spacing and quark mass, the coefficients evaluated using the p4 action are equal to those of hadron resonance gas at low temperature. Thus the parametrised equation of state can be smoothly connected to the hadron resonance gas equation of state. We see that the equation of state using Taylor coefficients up to second order is realistic only at low densities, and that at densities corresponding to s/n_B > 40, the expansion converges by the sixth order term.

Pasi Huovinen; Peter Petreczky; Christian Schmidt

2014-07-31T23:59:59.000Z

288

Dynamic measurement of heat loss coefficients through Trombe wall glazing systems  

SciTech Connect (OSTI)

A Trombe wall presents a unique opportunity to measure the heat-loss coefficient through the glazing system because the wall itself can be used as a heat meter. Since the instantaneous heat flux through the outer wall surface can be determined, the heat loss coefficient at night can be calculated by dividing by the wall surface-to-ambient temperature difference. This technique has been used to determine heat-loss coefficients for Los Alamos test rooms during the winter of 1980-1981. Glazing systems studied include single and double glazing both with and without night insulation used in conjunction with a flat black paint, and both single and double glazing used in conjunction with a selective surface.

Balcomb, J.D.

1981-01-01T23:59:59.000Z

289

Metastable Changes to the Temperature Coefficients of Thin-Film Photovoltaic Modules  

SciTech Connect (OSTI)

Transient changes in the performance of thin-film modules with light exposure are a well-known and widely reported phenomenon. These changes are often the result of reversible metastabilities rather than irreversible changes. Here we consider how these metastable changes affect the temperature dependence of photovoltaic performance. We find that in CIGS modules exhibiting a metastable increase in performance with light exposure, the light exposure also induces an increase in the magnitude of the temperature coefficient. It is important to understand such changes when characterizing temperature coefficients and when analyzing the outdoor performance of newly installed modules.

Deceglie, M. G.; Silverman, T. J.; Marion, B.; Kurtz, S. R.

2014-07-01T23:59:59.000Z

290

Prediction of diffusion coefficients in cement-based materials on the basis of migration experiments  

SciTech Connect (OSTI)

The chloride diffusion and migration coefficients of 15 different mortar mixtures were systematically compared. Test parameters included water/binder ratio (0.25 and 0.45), type of binder (ASTM type 1, ASTM type 3, and ASTM type 5), use of silica fume and sand volume fractions (0%, 30%, and 50%). Test results indicate the various ways of evaluating chloride transport coefficients generally yield much different values. Test results also show that the assumption of non interacting diffusing flows, used in the mathematical treatment of diffusion and migration equations, is most probably incorrect.

Delagrave, A.; Marchand, J.; Samson, E. [Univ. Laval, Ste-Foy, Quebec (Canada)] [Univ. Laval, Ste-Foy, Quebec (Canada)

1996-12-01T23:59:59.000Z

291

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

SciTech Connect (OSTI)

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

292

Gain broadening mechanism in various GaAlAs laser structures  

SciTech Connect (OSTI)

Coupling of an external grating to a GaAlAs laser results in a strong enhancement of the selected mode and a reduction of the nonselected modes. The spectral form of this reduction is measured with a new sensitive experimental arrangement for three types of laser structures: proton bombarded stripe geometry, V-groove and CSP lasers. This spectral form is determined by the gain curve of the laser only and is independent on the position of the selected mode, i.e., no spectral hole burning is observed at room temperature.

Ruehle, W.; Brosson, P.

1980-11-01T23:59:59.000Z

293

High-gain dc SQUID magnetometers with NbN nanobridges  

SciTech Connect (OSTI)

This paper reports on high-gain dc SQUIDs using NbN nanobridges fabricated for magnetometers with high sensitivity, and their device parameters and intrinsic energy sensitivity have been evaluated. The slit inductance of the square washer SQUID was reduced by using the co-planar edge structure of the low inductance. The junction capacitance was typically 15 {approximately} 40 ft. The maximum voltage modualtion was about 110 {mu}V for the NbN nanobridge SQUID with an inductance of 0.18nH.

Irie, A.; Hamasaki, K.; Yamashita, T. (Dept. of Electronics, Nagaoka Univ. of Technology, Kamitomioka-Machi 1603-1, Nagoka-shi, Niigata 940-21 (JP)); Matsui, T.; Komiyama, B. (Communication Research Lab., Ministry of Posts and Telecommunication, Koganei, Tokyo 184 (JP))

1991-03-01T23:59:59.000Z

294

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

DOE Patents [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

295

Frequency dependence of mass flow gain factor and cavitation compliance of cavitating inducers  

SciTech Connect (OSTI)

Unsteady cavitation characteristics are analyzed based on a closed cavity model in which the length of the cavity is allowed to oscillate. It is shown that the present model blends smoothly into quasisteady calculations in the low frequency limit, unlike fixed cavity length models. Effects of incidence angle and cavitation number on cavitation compliance and mass flow gain factor are shown as functions of reduce frequency. The cavity volume is evaluated by three methods and the results were used to confirm the accuracy and adequacy of the numerical calculation. By comparison with experimental data on inducers, it was shown that the present model can simulate the characteristics of unsteady cavitation qualitatively.

Otsuka, S.; Tsujimoto, Yoshinobu [Osaka Univ. (Japan); Kamijo, Kenjiro [National Aerospace Lab., Kakuda, Miyagi (Japan). Kakuda Research Center; Furuya, O. [AMP Technologies, Osaka (Japan)

1994-12-31T23:59:59.000Z

296

High-Gain Harmonic Generation Free-Electron Laser at Saturation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinement plasmas in thein the Assembly ofNa-ionInnovationGain Harmonic

297

Estimates of Impact Ionization Coefficients in Superlattice-Based Mid-Wavelength Infrared Avalanche Photodiodes  

E-Print Network [OSTI]

Photodiodes C.H. Grein1 , K. Abu El-Rub1,2 , M.E. Flatté3, and H. Ehrenreich4 1 Microphysics Laboratory ionization in type II superlattice mid- wavelength infrared avalanche photodiodes. The strategy to enhance gain, low noise avalanche photodiodes (APDs) with considerable spectral agility. The ability

Flatte, Michael E.

298

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

E-Print Network [OSTI]

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...

Wolf, R.; Froehlich, R.

1983-01-01T23:59:59.000Z

299

Radiation-induced gain degradation in lateral PNP BJTs with lightly and heavily doped emitters  

SciTech Connect (OSTI)

Ionizing radiation may cause failures in ICs due to gain degradation of individual devices. The base current of irradiated bipolar devices increases with total dose, while the collector current remains relatively constant. This results in a decrease in the current gain. Lateral PNP (LPNP) transistors typically exhibit more degradation than vertical PNP devices at the same total dose, and have been blamed as the cause of early IC failures at low dose rates. It is important to understand the differences in total-dose response between devices with heavily- and lightly-doped emitters in order to compare different technologies and evaluate the applicability of proposed low-dose-rate hardness-assurance methods. This paper addresses these differences by comparing two different LPNP devices from the same process: one with a heavily-doped emitter and one with a lightly-doped emitter. Experimental results demonstrate that the lightly-doped devices are more sensitive to ionizing radiation and simulations illustrate that increased recombination on the emitter side of the junction is responsible for the higher sensitivity.

Wu, A. [Univ. of Arizona, Tucson, AZ (United States); Schrimpf, R.D. [Vanderbilt Univ., Nashville, TN (United States); Pease, R.L. [RLP Research, Inc., Albuquerque, NM (United States); Fleetwood, D.M. [Sandia National Labs., Albuquerque, NM (United States); Kosier, S.L. [VTC Inc., Bloomington, MN (United States)

1997-06-01T23:59:59.000Z

300

The internal and translational energy dependence of molecular condensation coefficients: SF6 and CC&,  

E-Print Network [OSTI]

and the target surface since the gas-surface interaction potential is sampled by "single collision" scatteringThe internal and translational energy dependence of molecular condensation coefficients: SF6 and CC examine the internal and translational energy dependence of the molecular condensation probabilities

Mills, Allen P.

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.


301

Correlation for the Second Virial Coefficient of Water Allan H. Harveya...  

E-Print Network [OSTI]

by results calculated from a high- quality intermolecular pair potential. The new correlation agrees well rights reserved. DOI: 10.1063/1.1587731 Key words: H2O, second virial coefficient, steam, thermodynamicsVT Measurements. . . . . . . . 370 2.2. Data for B from Saturated Vapor Measurements

Magee, Joseph W.

302

Fretting Corrosion Damage of Total Hip Prosthesis: Friction Coefficient and Damage Rate Constant Approach  

E-Print Network [OSTI]

1 Fretting Corrosion Damage of Total Hip Prosthesis: Friction Coefficient and Damage Rate Constant Building, University Park 16802 PA USA 4 Chair Professor Center for Research Excellence in Corrosion hip prosthesis. Fretting corrosion tests were conducted with stainless steel and poly (methyl

Boyer, Edmond

303

Measurement of the thermal expansion coefficients of ferroelectric crystals by a moire interferometer  

E-Print Network [OSTI]

reserved. Keywords: Moire´ interferometry; Ferroelectric; Thermal expansion 1. Introduction Lithium niobate-phase-matched interactions [4­6]. Design of such devices requires accurate knowledge of the relevant physi- cal parameters properties, as the thermo-optic coefficients [7]. Further- more, in quasi-phase-match nonlinear processes

Arie, Ady

304

Comparison of attenuation coefficients for VVER-440 and VVER-1000 pressure vessels  

SciTech Connect (OSTI)

The paper summarizes the attenuation coefficient of the neutron fluence with E > 0.5 MeV through a reactor pressure vessel for vodo-vodyanoi energetichesky reactor (VVER) reactor types measured and/or calculated for mock-up experiments, as well as for operated nuclear power plant (NPP) units. The attenuation coefficient is possible to evaluate directly only by using the retro-dosimetry, based on a combination of the measured activities from the weld sample and concurrent ex-vessel measurement. The available neutron fluence attenuation coefficients (E > 0.5 MeV), calculated and measured at a mock-up experiment simulating the VVER-440-unit conditions, vary from 3.5 to 6.15. A similar situation is used for the calculations and mock-up experiment measurements for the VVER-1000 RPV, where the attenuation coefficient of the neutron fluence varies from 5.99 to 8.85. Because of the difference in calculations for the real units and the mock-up experiments, the necessity to design and perform calculation benchmarks both for VVER-440 and VVER-1000 would be meaningful if the calculation model is designed adequately to a given unit. (authors)

Marek, M.; Rataj, J.; Vandlik, S. [Reactor Physics Dept., Research Centre Rez, Husinec 130, 25068 (Czech Republic)

2011-07-01T23:59:59.000Z

305

Study of the effect of {sup 135}Xe poison on the temperature coefficient of TRIGA fuel  

SciTech Connect (OSTI)

A study of the influence of {sup 135}Xe on the prompt negative temperature coefficient of the 14-MW Romanian TRIGA reactor has been performed. Because of its large absorption cross section below 0.1 eV, we expected that {sup 135}Xe might make a positive contribution to the temperature coefficient because the higher-energy neutrons are less likely to be absorbed by the Xe. This effect would be largest about 16 hours after reactor shutdown. In order to investigate this phenomenon, we have performed cell and core calculations for various fuel temperatures, burnups, and {sup 135}Xe levels. These calculations indeed show a positive contribution of {sup 135}Xe to the temperature coefficient, especially for high burnups, where little {sup 167}Er remains to absorb the higher-energy neutrons. Work is in progress to evaluate the effect of the smaller negative temperature coefficient on the consequences of reactivity insertion accidents in unfavorable situations of {sup 135}Xe poisoning of the Romanian TRIGA core. (author)

Iorgulis, Constantin [TRIGA Reactor Facility, Institute for Nuclear Research, Pitesti (Romania)

1992-07-01T23:59:59.000Z

306

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

SciTech Connect (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

307

Virial coefficients and vapor-liquid equilibria of the EXP6 and 2-Yukawa fluids  

E-Print Network [OSTI]

Virial coefficients $B_2$ through $B_4$ and the vapor-liquid equilibria for the EXP6 and 2-Yukawa (2Y) fluids have been determined using numerical integrations and Gibbs ensemble simulations, respectively. The chosen 2Y models have been recently determined as an appropriate reference fluid for the considered EXP6 models.

J. Krejcí; I. Nezbeda; R. Melnyk; A. Trokhymchuk

2011-07-20T23:59:59.000Z

308

Specular highlights of plastic surfaces and the Fresnel Coefficient Elli Angelopoulou*  

E-Print Network [OSTI]

Specular highlights of plastic surfaces and the Fresnel Coefficient Elli Angelopoulou* and Sofya that the color of specularities for materials like plastics and ceramics can be approximated by the color by experiments performed on multispectral images of different colored plastic tiles. The refractive indices

Angelopoulou, Elli

309

On the Inversion of Mel-Frequency Cepstral Coefficients for Speech Enhancement Applications  

E-Print Network [OSTI]

On the Inversion of Mel-Frequency Cepstral Coefficients for Speech Enhancement Applications Laura E recognition system. The use of GMMs for speech enhancement applications has only recently been proposed present a means to invert MFCCs for use in speech enhancement applications. Results for cepstral inversion

De Leon, Phillip

310

Ultrasonic backscatter coefficient quantitative estimates from Chinese hamster ovary cell pellet biophantoms  

E-Print Network [OSTI]

Ultrasonic backscatter coefficient quantitative estimates from Chinese hamster ovary cell pellet August 2010; accepted 6 August 2010 A cell pellet biophantom technique is introduced, and applied verification purposes. BSC estimates from CHO cell pellet biophantoms of known number density were performed

Illinois at Urbana-Champaign, University of

311

Estimating ProteinLigand Binding Free Energy: Atomic Solvation Parameters for Partition Coefficient and  

E-Print Network [OSTI]

on the assumption that the overall solvation free energy is the sum of all atomic solvation contributions: Gs iAi (1Estimating Protein­Ligand Binding Free Energy: Atomic Solvation Parameters for Partition Coefficient and Solvation Free Energy Calculation Jianfeng Pei,1,2 Qi Wang,1,2 Jiaju Zhou,3 and Luhua Lai1

Luhua, Lai

312

Supporting Information Field-Effect modulation of Seebeck Coefficient in Single PbSe  

E-Print Network [OSTI]

1 Supporting Information Field-Effect modulation of Seebeck Coefficient in Single PbSe Nanowires to dry the solution and form Pb oleate. After cooling the Pb oleate solution to 60ºC, 4 mL of 0.16M and Scientific Instrument voltage amplifier, respectively. Thermoelectric power measurements were done

Yang, Peidong

313

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...

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

2008-01-01T23:59:59.000Z

314

Infrared and ultraviolet problem for the Nelson model with variable coefficients  

E-Print Network [OSTI]

Infrared and ultraviolet problem for the Nelson model with variable coefficients C. G´erard,1 , F of the Hamiltonian in the presence of the infrared problem, i.e. assuming that the boson mass tends to 0 at infinity state one usually speaks of the infrared problem or infrared divergence. The infrared problem arises

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

The relationship of the distribution coefficient to surface area for microcline and albite feldspars  

E-Print Network [OSTI]

-liquid, or liquid- solid, will distribute itself between the two layers in a constant con- centration ratio, at constant temperature (Glasstone and Lewis, 1960)], a distribution coefficient may be obtained for the ion-exchange reac- tion between iona in solution...

Maxwell, John Reed

1968-01-01T23:59:59.000Z

317

National Poverty Center Working Paper Series The GINI Coefficient and Segregation on a Continuous Variable  

E-Print Network [OSTI]

National Poverty Center Working Paper Series #05-2 March 2005 The GINI Coefficient and Segregation at Dallas This paper is available online at the National Poverty Center Working Paper Series index at: http of the author(s) and do not necessarily reflect the view of the National Poverty Center or any sponsoring agency

Shyy, Wei

318

Heteroleptic diimine copper (I) complexes with large extinction coefficients: synthesis, quantum chemistry calculations and physico-  

E-Print Network [OSTI]

1 Heteroleptic diimine copper (I) complexes with large extinction coefficients: synthesis, quantum. . Abstract Using the HETPHEN approach, five new heteroleptic copper(I) complexes composed of a push-pull 4 complexes experimentally demonstrate that large light harvesting properties with bis-diimine copper

Paris-Sud XI, Université de

319

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between tracer diffusion  

E-Print Network [OSTI]

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between J. P., Grenier J. C., Loup J. P. ABSTRACT Chemical oxygen diusion coecient ¯(D)was measured the oxygen partial pressure in the surrounding atmosphere of the sample. The consequent evolution

Paris-Sud XI, Université de

320

Cross-Plane Seebeck Coefficient Anomaly in a High Barrier Superlattice with Miniband Formation  

E-Print Network [OSTI]

is equivalent to a material with a positive Seebeck coefficient. This will be useful in cascading thermoelements for measurements. First, we calibrated the heater resistance with the stage temperature. To reduce the influence of the contact wires and pads, we used a four-wire measurement for gauging the resistance. At a given heater

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

Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny  

E-Print Network [OSTI]

Absorbed dose in target cell nuclei and dose conversion coefficient of radon progeny in the human Abstract To calculate the absorbed dose in the human lung due to inhaled radon progeny, ICRP focussed and secretory cells). The absorbed energy for alpha particles emitted by radon progeny in the human respiratory

Yu, K.N.

322

Analysis of Clustering Coefficients of Online Social Networks by Duplication Models  

E-Print Network [OSTI]

the micro operations that lead to the formation of social networks. The objective is to devise a growthAnalysis of Clustering Coefficients of Online Social Networks by Duplication Models Duan-Shin Lee of online social networks by a duplication model. In this model vertices are added into the network one

Chang, Cheng-Shang

323

Vertically Loaded Anchor: Drag Coefficient, Fall Velocity, and Penetration Depth using Laboratory Measurements  

E-Print Network [OSTI]

anchor point. Values such as drag coefficient and terminal velocity are vital in predicting embedment depth to obtain the mooring capacity required by the floating facility. Two scaled models of the Mark I OMNI-Max anchor were subjected to a series...

Cenac, William

2011-08-08T23:59:59.000Z

324

Row spacing effects on the canopy light extinction coefficient of upland cotton  

E-Print Network [OSTI]

coefficient (k) in cotton (Gossypium hirsutum). Treatments consisted of four row spacings (0.19-m, 0.38-m, 0.76-m, and 1.00-m) and four plant densities [148, 222, 296, 445 (1998) and 371 (1999) thousand plants ha-1] with each treatment replicated three times...

Steglich, Evelyn Marie

2000-01-01T23:59:59.000Z

325

Hydrodynamic Coefficients and Wave Loads for a WEC Device in Heaving Mode  

E-Print Network [OSTI]

. This model is intended to be used for WEC control purposes. A semi-analytical approach is therefore proposed for the computation of the hydrodynamic coefficients and the excitation forces. The boundary value problem is solved--Wave Energy Converter, potential theory, eigen- function expansion, wave-loads, heaving mode, scattering

Paris-Sud XI, Université de

326

Adaptive Algebraic Multigrid for Finite Element Elliptic Equations with Random Coefficients  

SciTech Connect (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

327

Gains and losses in the eyes of the beholder: a comparative study of foreign policy decision making under risk  

E-Print Network [OSTI]

Prospect theory is a descriptive model of individual decision-making under risk (Kahneman and Tversky 1979). The central tenet of prospect theory posits that the risk orientation of decision-makers is affected by the gains vs. losses domains...

Yang, Yi

2006-04-12T23:59:59.000Z

328

Emotional intelligence and manipulation: Are those scoring higher on EI measures more likely to negatively manipulate others' for personal gains  

E-Print Network [OSTI]

The association between emotional intelligence (EI) and manipulation was examined in this study. The possibility that individuals who score higher on EI would be more likely to negatively manipulate others for personal gain was the main hypothesis...

Carter, Sophie

2013-01-01T23:59:59.000Z

329

Structure of the eastern Red Rocks and Wind Ridge thrust faults, Wyoming: how a thrust fault gains displacement along strike  

E-Print Network [OSTI]

STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1983 Major Subject: Geology STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN...

Huntsman, Brent Stanley

1983-01-01T23:59:59.000Z

330

Boonea (= Odostomia) impressa (Say) (Gastropoda: Pyramidellidae): its life history and impact on shell weight gain in Crassostrea virginica  

E-Print Network [OSTI]

Boonea (= Odostomia) impressa (SAY) (GASTROPODA: PYRAMIDELLIDAE): ITS LIFE HISTORY AND IMPACT ON SHELL WEIGHT GAIN IN Crassostrea virginica A Thesis by MARIE ELINOR WHITE Submitted to the Graduate College of Texas Agdi University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1983 Major Subject: Oceanography Boonea (= Odostomia) impressa (SAY) (GASTROPODA: PYRAMIDELLIDAE): ITS LIFE HISTORY AND IMPACT ON SHELL WEIGHT GAIN IN Crassostrea virginica A...

White, Marie Elinor

1983-01-01T23:59:59.000Z

331

Many-body effects on optical gain in GaAsPN/GaPN quantum well lasers for silicon integration  

SciTech Connect (OSTI)

Many-body effects on the optical gain in GaAsPN/GaP QW structures were investigated by using the multiband effective-mass theory and the non-Markovian gain model with many-body effects. The free-carrier model shows that the optical gain peak slightly increases with increasing N composition. In addition, the QW structure with a larger As composition shows a larger optical gain than that with a smaller As composition. On the other hand, in the case of the many-body model, the optical gain peak decreases with increasing N composition. Also, the QW structure with a smaller As composition is observed to have a larger optical gain than that with a larger As composition. This can be explained by the fact that the QW structure with a smaller As or N composition shows a larger Coulomb enhancement effect than that with a larger As or N composition. This means that it is important to consider the many-body effect in obtaining guidelines for device design issues.

Park, Seoung-Hwan, E-mail: shpark@cu.ac.kr [Department of Electronics Engineering, Catholic University of Daegu, Hayang, Kyeongbuk 712-702 (Korea, Republic of)

2014-02-14T23:59:59.000Z

332

Molecular radiotherapy: The NUKFIT software for calculating the time-integrated activity coefficient  

SciTech Connect (OSTI)

Purpose: Calculation of the time-integrated activity coefficient (residence time) is a crucial step in dosimetry for molecular radiotherapy. However, available software is deficient in that it is either not tailored for the use in molecular radiotherapy and/or does not include all required estimation methods. The aim of this work was therefore the development and programming of an algorithm which allows for an objective and reproducible determination of the time-integrated activity coefficient and its standard error.Methods: The algorithm includes the selection of a set of fitting functions from predefined sums of exponentials and the choice of an error model for the used data. To estimate the values of the adjustable parameters an objective function, depending on the data, the parameters of the error model, the fitting function and (if required and available) Bayesian information, is minimized. To increase reproducibility and user-friendliness the starting values are automatically determined using a combination of curve stripping and random search. Visual inspection, the coefficient of determination, the standard error of the fitted parameters, and the correlation matrix are provided to evaluate the quality of the fit. The functions which are most supported by the data are determined using the corrected Akaike information criterion. The time-integrated activity coefficient is estimated by analytically integrating the fitted functions. Its standard error is determined assuming Gaussian error propagation. The software was implemented using MATLAB.Results: To validate the proper implementation of the objective function and the fit functions, the results of NUKFIT and SAAM numerical, a commercially available software tool, were compared. The automatic search for starting values was successfully tested for reproducibility. The quality criteria applied in conjunction with the Akaike information criterion allowed the selection of suitable functions. Function fit parameters and their standard error estimated by using SAAM numerical and NUKFIT showed differences of <1%. The differences for the time-integrated activity coefficients were also <1% (standard error between 0.4% and 3%). In general, the application of the software is user-friendly and the results are mathematically correct and reproducible. An application of NUKFIT is presented for three different clinical examples.Conclusions: The software tool with its underlying methodology can be employed to objectively and reproducibly estimate the time integrated activity coefficient and its standard error for most time activity data in molecular radiotherapy.

Kletting, P.; Schimmel, S.; Luster, M. [Klinik für Nuklearmedizin, Universität Ulm, Ulm 89081 (Germany)] [Klinik für Nuklearmedizin, Universität Ulm, Ulm 89081 (Germany); Kestler, H. A. [Research Group Bioinformatics and Systems Biology, Institut für Neuroinformatik, Universität Ulm, Ulm 89081 (Germany)] [Research Group Bioinformatics and Systems Biology, Institut für Neuroinformatik, Universität Ulm, Ulm 89081 (Germany); Hänscheid, H.; Fernández, M.; Lassmann, M. [Klinik für Nuklearmedizin, Universität Würzburg, Würzburg 97080 (Germany)] [Klinik für Nuklearmedizin, Universität Würzburg, Würzburg 97080 (Germany); Bröer, J. H.; Nosske, D. [Bundesamt für Strahlenschutz, Fachbereich Strahlenschutz und Gesundheit, Oberschleißheim 85764 (Germany)] [Bundesamt für Strahlenschutz, Fachbereich Strahlenschutz und Gesundheit, Oberschleißheim 85764 (Germany); Glatting, G. [Medical Radiation Physics/Radiation Protection, Medical Faculty Mannheim, Heidelberg University, Mannheim 68167 (Germany)] [Medical Radiation Physics/Radiation Protection, Medical Faculty Mannheim, Heidelberg University, Mannheim 68167 (Germany)

2013-10-15T23:59:59.000Z

333

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

SciTech Connect (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

334

Using Numerical Simulations to Gain Insight into the Structure of Superbubbles  

E-Print Network [OSTI]

Recent high resolution observations of Galactic superbubbles have motivated us to re-examine several classes of superbubble models. We compare three classes of hydrodynamic models (the Kompaneets approximation, the thin shell model, and numerical simulations) in order to understand the structure of superbubbles and to gain insight into observations. In particular, we apply models to the W4 superbubble, which has been observed in the Pilot project of the arcminute resolution Canadian Galactic Plane Survey (Normandeau et al. 1996). Magnetohydrodynamic simulations are also performed and point the way to a fuller understanding of the W4 superbubble. We suggest that the highly collimated bubble and apparent lack of a Rayleigh-Taylor instability in the superbubble shell can be explained by the presence of a magnetic field.

Philip T. Komljenovic; Shantanu Basu; Doug Johnstone

1999-01-21T23:59:59.000Z

335

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

336

Antenna Gain and Link Budget for Waves Carrying Orbital Angular Momentum (OAM)  

E-Print Network [OSTI]

This paper addresses the RF link budget of a communication system using unusual waves carrying an orbital angular momentum (OAM) in order to clearly analyse the fundamental changes for telecommunication applications. The study is based on a typical configuration using circular array antennas to transmit and receive OAM waves. For any value of the OAM mode order, an original asymptotic formulation of the link budget is proposed in which equivalent antenna gains and free-space losses appear. The formulations are then validated with the results of a commercial electromagnetic simulation software. By this way, we also show how our formula can help to design a system capable of superimposing several channels on the same bandwidth and the same polarisation, based on the orthogonality of the OAM. Additional losses due to the use of this degree of freedom are notably clearly calculated to quantify the benefit and drawback according to the case.

Nguyen, Duy Kevin; Sokoloff, Jérôme; Chabory, Alexandre; Palacin, Baptiste; Capet, Nicolas

2015-01-01T23:59:59.000Z

337

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

338

Diurnal heat storage in direct-gain passive-solar buildings  

SciTech Connect (OSTI)

This paper presents a simplified method for predicting temperature swings in direct-gain buildings. It is called the DHC method due to the use of a diurnal heat capacity (DHC). Diurnal heat capacity is a measure of the effective amount of heat stored during a sunny day and then released at night - the typical 24-hour diurnal cycle. This enables prediction of the maximum temperature swings experienced in the building and can be calculated using a single 24-hour harmonic. The advantage is that closed-form analytic solutions can be obtained for a variety of simple and layered-wall configurations. Higher harmonic components are accounted for by a correction factor. The method is suitable for us by hand or on a programmable calculator.

Balcomb, J.D.; Neeper, D.A.

1983-01-01T23:59:59.000Z

339

Temperature and water vapor pressure effects on the friction coefficient of hydrogenated diamondlike carbon films.  

SciTech Connect (OSTI)

Microtribological measurements of a hydrogenated diamondlike carbon film in controlled gaseous environments show that water vapor plays a significant role in the friction coefficient. These experiments reveal an initial high friction transient behavior that does not reoccur even after extended periods of exposure to low partial pressures of H{sub 2}O and O{sub 2}. Experiments varying both water vapor pressure and sample temperature show trends of a decreasing friction coefficient as a function of both the decreasing water vapor pressure and the increasing substrate temperature. Theses trends are examined with regard to first order gas-surface interactions. Model fits give activation energies on the order of 40 kJ/mol, which is consistent with water vapor desorption.

Dickrell, P. L.; Sawyer, W. G.; Eryilmaz, O. L.; Erdemir, A.; Energy Technology; Univ. of Florida

2009-07-01T23:59:59.000Z

340

Cold dilute neutron matter on the lattice I: Lattice virial coefficients and large scattering lengths  

E-Print Network [OSTI]

We study cold dilute neutron matter on the lattice using an effective field theory. We work in the unitary limit in which the scattering length is much larger than the interparticle spacing. In this paper we focus on the equation of state at temperatures above the Fermi temperature and compare lattice simulations to the virial expansion on the lattice and in the continuum. We find that in the unitary limit lattice discretization errors in the second virial coefficient are significantly enhanced. As a consequence the equation of state does not show the universal scaling behavior expected in the unitary limit. We suggest that scaling can be improved by tuning the second virial coefficient rather than the scattering length.

Dean Lee; Thomas Schaefer

2005-09-07T23:59:59.000Z

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.


341

Temperature dependence of the radiative recombination coefficient in crystalline silicon from spectral photoluminescence  

SciTech Connect (OSTI)

The radiative recombination coefficient B(T) in crystalline silicon is determined for the temperature range 90–363?K, and in particular from 270 to 350?K with an interval of 10?K, where only sparse data are available at present. The band-band absorption coefficient established recently by Nguyen et al. [J. Appl. Phys. 115, 043710 (2014)] via photoluminescence spectrum measurements is employed to compute the values of B(T) at various temperatures. The results agree very well with literature data from Trupke et al. [J. Appl. Phys. 94, 4930 (2003).] We present a polynomial parameterization describing the temperature dependence of the product of B(T) and the square of the intrinsic carrier density. We also find that B(T) saturates at a near constant value at room temperature and above for silicon samples with relatively low free carrier densities.

Nguyen, Hieu T., E-mail: hieu.nguyen@anu.edu.au; Macdonald, Daniel [Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 0200 (Australia); Baker-Finch, Simeon C. [Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 0200 (Australia); PV Lighthouse, Coledale, NSW 2515 (Australia)

2014-03-17T23:59:59.000Z

342

Study of photon attenuation coefficients of some multielement materials. [123-1250 keV  

SciTech Connect (OSTI)

Total photon mass attenuation of six multielement shielding materials (concrete, plaster of paris, quick lime, black cement, white cement, and silica) is measured in the 123- to 1,250-keV energy range. The experimental results are analyzed in terms of cross sections, effective atomic numbers, and electron densities. Considerable sensitivity of the total mass attenuation coefficients and effective atomic numbers to variations in oxygen content are found in these multielement materials.

Bhandal, G.S. (N.J.S.A. Government Coll., Punjab (India)); Singh, K. (Guru Nanak Dev Univ., Amritsar (India). Dept. of Physics)

1994-03-01T23:59:59.000Z

343

Simulation of miscible displacement in soils and sensitivity to the dispersion coefficient  

E-Print Network [OSTI]

in the porous media to the magnitude of the dispersion coefficient in the diffusion-type dispersion equation. Three simulation models were developed. One was capable of simulating unsaturated vertical infiltration of water into a homo- geneous, isotropic... porous media. The second simulated saturated dispersion of solutes during the steady state flow of water through homogeneous, isotropic porous media. The third general dispersion simulation model combined the aforementioned two and was capable...

Smajstrla, Allen George

1973-01-01T23:59:59.000Z

344

Determination of thermal accommodation coefficients from heat transfer measurements between parallel plates.  

SciTech Connect (OSTI)

Thermal accommodation coefficients have been derived for a variety of gas-surface combinations using an experimental apparatus developed to measure the pressure dependence of the conductive heat flux between parallel plates at unequal temperature separated by a gas-filled gap. The heat flux is inferred from temperature-difference measurements across the plates in a configuration where the plate temperatures are set with two carefully controlled thermal baths. Temperature-controlled shrouds provide for environmental isolation of the opposing test plates. Since the measured temperature differences in these experiments are very small (typically 0.3 C or less over the entire pressure range), high-precision thermistors are used to acquire the requisite temperature data. High-precision components have also been utilized on the other control and measurement subsystems in this apparatus, including system pressure, gas flow rate, plate alignment, and plate positions. The apparatus also includes the capability for in situ plasma cleaning of the installed test plates. Measured heat-flux results are used in a formula based on Direct Simulation Monte Carlo (DSMC) code calculations to determine the thermal accommodation coefficients. Thermal accommodation coefficients have been determined for three different gases (argon, nitrogen, helium) in contact with various surfaces. Materials include metals and alloys such as aluminum, gold, platinum, and 304 stainless steel. A number of materials important to fabrication of Micro Electro Mechanical Systems (MEMS) devices have also been examined. For most surfaces, coefficient values are near 0.95, 0.85, and 0.45 for argon, nitrogen, and helium, respectively. Only slight differences in accommodation as a function of surface roughness have been seen. Surface contamination appears to have a more significant effect: argon plasma treatment has been observed to reduce thermal accommodation by as much as 0.10 for helium. Mixtures of argon and helium have also been examined, and the results have been compared to DSMC simulations incorporating thermal-accommodation values from single-species experiments.

Gallis, Michail A.; Castaneda, Jaime N.; Rader, Daniel John; Torczynski, John Robert; Trott, Wayne Merle

2010-10-01T23:59:59.000Z

345

Identification of the Flow Resistance Coefficient and Validation of a Building Air Conditioning System  

E-Print Network [OSTI]

for HRC estimation is investigated in this paper. And some conclusions can be got as follows: 1) The MGO method is applicable for S value identification. The method is based on the principle for multi goal optimization. The process can be widely used...ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-11-2 Zhijian Hou Identification of the Flow Resistance Coefficient and Validation of a Building Air Conditioning System Zhiwei Lian...

Hou, Z.; Lian, Z.

2006-01-01T23:59:59.000Z

346

A test rig for the identification of rotordynamic coefficients of fluid film bearings  

E-Print Network [OSTI]

. The test bearing articles were considered for cryogenic applications where the actual lubrication medium is liquid hydrogen or liquid oxygen. The parameter identification method used an advanced pseudo-random forcing excitation and a technique based...A TEST RIG FOR THE IDENTIFICATION OF ROTORDYNAMIC COEFFICIENTS OF FLUID FILM BEARINGS A Thesis LEWIS MILLER ROBISON III Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

Robison, Lewis Miller

1995-01-01T23:59:59.000Z

347

Experimental and theoretical rotordynamic coefficients and leakage of straight smooth annular gas seals  

E-Print Network [OSTI]

-dimensional flow coefficient ? Rotor speed [1/T] ? Excitation frequency [1/T] Subscripts ij Direction of response and force 1 INTRODUCTION Annular gas seals are used in a variety of turbomachinery applications. Different seal configurations...] turbulent bulk flow model are developed, and then a perturbation analysis is employed to obtain a set of zero- and first- order equations. Integration of the zeroth-order equations yields the leakage and integration of the first-order equations yields...

Kerr, Bradley Gray

2005-02-17T23:59:59.000Z

348

Computer Simulation of Atoms Nuclei Structure Using Information Coefficients of Proportionality  

E-Print Network [OSTI]

The latest research of the proportionality of atomic weights of chemical elements made it possible to obtain 3 x 3 matrices for the calculation of information coefficients of proportionality Ip that can be used for 3D modeling of the structure of atom nucleus. The results of computer simulation show high potential of nucleus structure research for the characterization of their chemical and physical properties.

Labushev, Mikhail M

2012-01-01T23:59:59.000Z

349

Computer Simulation of Atoms Nuclei Structure Using Information Coefficients of Proportionality  

E-Print Network [OSTI]

The latest research of the proportionality of atomic weights of chemical elements made it possible to obtain 3 x 3 matrices for the calculation of information coefficients of proportionality Ip that can be used for 3D modeling of the structure of atom nucleus. The results of computer simulation show high potential of nucleus structure research for the characterization of their chemical and physical properties.

Mikhail M. Labushev

2012-06-20T23:59:59.000Z

350

Heat kernel Coefficients and Divergencies of the Casimir Energy for the Dispersive Sphere  

E-Print Network [OSTI]

The first heat kernel coefficients are calculated for a dispersive ball whose permittivity at high frequency differs from unity by inverse powers of the frequency. The corresponding divergent part of the vacuum energy of the electromagnetic field is given and ultraviolet divergencies are seen to be present. Also in a model where the number of atoms is fixed the pressure exhibits infinities. As a consequence, the ground-state energy for a dispersive dielectric ball cannot be interpreted easily.

M. Bordag; K. Kirsten

2001-10-24T23:59:59.000Z

351

Determining diffusion coefficients of ionic liquids by means of field cycling nuclear magnetic resonance relaxometry  

SciTech Connect (OSTI)

Field Cycling Nuclear Magnetic Resonance (FC NMR) relaxation studies are reported for three ionic liquids: 1-ethyl-3- methylimidazolium thiocyanate (EMIM-SCN, 220–258 K), 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM-BF{sub 4}, 243–318 K), and 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF{sub 6}, 258–323 K). The dispersion of {sup 1}H spin-lattice relaxation rate R{sub 1}(?) is measured in the frequency range of 10 kHz–20 MHz, and the studies are complemented by {sup 19}F spin-lattice relaxation measurements on BMIM-PF{sub 6} in the corresponding frequency range. From the {sup 1}H relaxation results self-diffusion coefficients for the cation in EMIM-SCN, BMIM-BF{sub 4}, and BMIM-PF{sub 6} are determined. This is done by performing an analysis considering all relevant intra- and intermolecular relaxation contributions to the {sup 1}H spin-lattice relaxation as well as by benefiting from the universal low-frequency dispersion law characteristic of Fickian diffusion which yields, at low frequencies, a linear dependence of R{sub 1} on square root of frequency. From the {sup 19}F relaxation both anion and cation diffusion coefficients are determined for BMIM-PF{sub 6}. The diffusion coefficients obtained from FC NMR relaxometry are in good agreement with results reported from pulsed- field-gradient NMR. This shows that NMR relaxometry can be considered as an alternative route of determining diffusion coefficients of both cations and anions in ionic liquids.

Kruk, D. [Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, S?oneczna 54, PL-10710 Olsztyn (Poland); Universität Bayreuth, Experimentalphysik II, 95440 Bayreuth (Germany); Meier, R.; Rössler, E. A. [Universität Bayreuth, Experimentalphysik II, 95440 Bayreuth (Germany); Rachocki, A. [Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Pozna? (Poland); Korpa?a, A. [Department of Biophysics, Jagiellonian University Medical College, ?azarza 16, 31-530 Kraków, Poland and Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków (Poland); Singh, R. K. [Ionic Liquid and Solid State Ionics Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221 005 (India)

2014-06-28T23:59:59.000Z

352

Relationship of Viscosity, Surface Tensions, and Coefficient of Friction of Lubricating Oils  

E-Print Network [OSTI]

oils, is easily accounted for. Ilineral lubricating oils are not affected by high pressure steam or alkalies and these character- istics enable them to be used where other lubricants would be quite unfitted for the work. Animal Oils:-- These oils...RELATI01ISHII OF VISCOSITY, SUHFACE TEUSIOUS, A3D COEFFICIENT O? FlilCTIOB 0? LUBRICATING OILS. A Thesis Submitted to the Faculty of the Graduate School, University of Kansas, Lawrence. For The Degree of Master of Science ilechanioal...

Carson, Earl

1914-01-01T23:59:59.000Z

353

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

354

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

SciTech Connect (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

355

Relativistic calculations of $C_6$ and $C_8$ coefficients for strontium dimers  

E-Print Network [OSTI]

The electric dipole and quadrupole polarizabilities of the $5s5p~^3\\!P_1^o$ state and the $C_6$ and $C_8$ coefficients for the $^1\\!S_0 +\\, ^1\\!S_0$ and $^1\\!S_0 +\\, ^3\\!P_1^o$ dimers of strontium are calculated using a high-precision relativistic approach that combines configuration interaction and linearized coupled-cluster methods. Our recommended values of the long range dispersion coefficients for the $0_u$ and $1_u$ energy levels are $C_6(0_u)=3771(32)$ a.u. and $C_6(1_u)= 4001(33)$ a.u., respectively. They are in good agreement with recent results from experimental photoassociation data. We also calculate $C_8$ coefficients for Sr dimers, which are needed for precise determination of long-range interaction potential. We confirm the experimental value for the magic wavelength, where the Stark shift on the $^1\\!S_0$-$^3\\!P_1^o$ transition vanishes. The accuracy of calculations is analyzed and uncertainties are assigned to all quantities reported in this work.

S. G. Porsev; M. S. Safronova; Charles W. Clark

2014-09-21T23:59:59.000Z

356

Transport coefficients of heavy quarks around $T_c$ at finite quark chemical potential  

E-Print Network [OSTI]

The interactions of heavy quarks with the partonic environment at finite temperature $T$ and finite quark chemical potential $\\mu_q$ are investigated in terms of transport coefficients within the Dynamical Quasi-Particle model (DQPM) designed to reproduce the lattice-QCD results (including the partonic equation of state) in thermodynamic equilibrium. These results are confronted with those of nuclear many-body calculations close to the critical temperature $T_c$. The hadronic and partonic spatial diffusion coefficients join smoothly and show a pronounced minimum around $T_c$, at $\\mu_q=0$ as well as at finite $\\mu_q$. Close and above $T_c$ its absolute value matches the lQCD calculations for $\\mu_q=0$. The smooth transition of the heavy quark transport coefficients from the hadronic to the partonic medium corresponds to a cross over in line with lattice calculations, and differs substantially from perturbative QCD (pQCD) calculations which show a large discontinuity at $T_c$. This indicates that in the vicinity of $T_c$ dynamically dressed massive partons and not massless pQCD partons are the effective degrees-of-freedom in the quark-gluon plasma.

H. Berrehrah; P. B. Gossiaux; J. Aichelin; W. Cassing; J. M. Torres-Rincon; E. Bratkovskaya

2014-06-20T23:59:59.000Z

357

Normalized Lift: An Energy Interpretation of the Lift Coefficient Simplifies Comparisons of the Lifting Ability of Rotating and Flapping Surfaces  

E-Print Network [OSTI]

coefficient of a fixed wing slightly differently, as the work exerted by the wing on the surrounding flow field (L/?·S), compared against the total kinetic energy required for generating said lift, ½v2. This reinterpreted coefficient, the normalized lift...

Burgers, Phillip; Alexander, David E.

2012-05-21T23:59:59.000Z

358

728 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 34, NO. 3, JUNE 2006 The Electron Diffusion Coefficient in Energy  

E-Print Network [OSTI]

Coefficient in Energy in Bounded Collisional Plasmas Lev D. Tsendin Abstract--The electron energies in typical, the momentum relaxation in collisions with neutrals is sig- nificantly faster than the energy relaxation due be de- scribed by a diffusion coefficient in energy . Both collisional and stochastic heating mechanisms

Kaganovich, Igor

359

Abstract. Tailored porous media is a proposed method of achieving higher heat transfer coefficients while seeking to  

E-Print Network [OSTI]

Abstract. Tailored porous media is a proposed method of achieving higher heat transfer coefficients general porous flow model (MERLOT [1]). The Model of Energy- transfer Rate for fLow in Open transfer performance. The low heat capacities and low heat transfer coefficients, h, of gas coolants

Raffray, A. René

360

Effective conductivity, dielectric constant, and diffusion coefficient of digitized composite media via first-passage-time equations  

E-Print Network [OSTI]

Effective conductivity, dielectric constant, and diffusion coefficient of digitized composite media, dielectric constant and diffusion coefficient of digitized composite media. This is accomplished by first then develop the appropriate first-passage-time equations for digitized media: first-passage squares in two

Torquato, Salvatore

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

CX-002537: Categorical Exclusion Determination | Department of...  

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

Exclusion Determination Measurement of Distribution Coefficients for Z-Area Industrial Solid Waste Landfill Samples and Lab Prepared Grouts CX(s) Applied: B3.6 Date: 05052010...

362

Numerical investigation into the injection-locking phenomena of gain switched lasers for optical frequency comb generation  

E-Print Network [OSTI]

We present detailed numerical simulations of the laser dynamics that describe optical frequency comb formation by injection-locking a gain-switched laser. The typical rate equations for semiconductor lasers including stochastic carrier recombination and spontaneous emission suffice to show the injection-locking behavior of gain switched lasers, and we show how the optical frequency comb evolves starting from the free-running state, right through the final injection- locked state. Unlike the locking of continuous wave lasers, we show that the locking range for gain switched lasers is considerably greater because injection locking can be achieved by injecting at frequencies close to one of the comb lines. The quality of the comb lines are formally assessed by calculating the FM-noise spectral density and we show that under injection-locking conditions the FM-noise spectral density of the comb lines tend to that of the maser laser.

Duill, Sean P O; Zhou, Rui; Barry, Liam P

2015-01-01T23:59:59.000Z

363

Lossless anomalous dispersion and an inversionless gain doublet via dressed interacting ground states  

SciTech Connect (OSTI)

Transparent media exhibiting anomalous dispersion have been of considerable interest since Wang, Kuzmich, and Dogariu [Nature 406, 277 (2000)] first observed light propagate with superluminal and negative group velocities without absorption. Here, we propose an atomic model exhibiting these properties, based on a generalization of amplification without inversion in a five-level dressed interacting ground-state system. The system consists of a {Lambda} atom prepared as in standard electromagnetically induced transparency (EIT), with two additional metastable ground states coupled to the {Lambda} atom ground states by two rf-microwave fields. We consider two configurations by which population is incoherently pumped into the ground states of the atom. Under appropriate circumstances, we predict a pair of new gain lines with tunable width, separation, and height. Between these lines, absorption vanishes but dispersion is large and anomalous. The system described here is a significant improvement over other proposals in the anomalous dispersion literature in that it permits additional coherent control over the spectral properties of the anomalous region, including a possible 10{sup 4}-fold increase over the group delay observed by Wang, Kuzmich, and Dogariu.

Weatherall, James Owen [Department of Physics and Engineering Physics, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States); Department of Mathematical Sciences, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States); Department of Logic and Philosophy of Science, University of California Irvine, 3151 Social Science Plaza A, Irvine, California 92697 (United States); Search, Christopher P. [Department of Physics and Engineering Physics, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, New Jersey 07030 (United States)

2010-02-15T23:59:59.000Z

364

Automatic Gain Control in Mass Spectrometry using a Jet Disrupter Electrode in an Electrodynamic Ion Funnel  

SciTech Connect (OSTI)

We report on the use of a jet disrupter electrode in an electrodynamic ion funnel as an electronic valve to regulate the intensity of the ion beam transmitted through the interface of a mass spectrometer in order to perform automatic gain control (AGC). The ion flux is determined by either directly detecting the ion current on the conductance limiting orifice of the ion funnel or using a short mass spectrometry acquisition. Based upon the ion flux intensity, the voltage of the jet disrupter is adjusted to alter the transmission efficiency of the ion funnel to provide a desired ion population to the mass analyzer. Ion beam regulation by an ion funnel is shown to provide an unbiased control to within a few percent of a targeted ion intensity or abundance. The utility of ion funnel AGC was evaluated using a protein tryptic digest analyzed with liquid chromatography Fourier transform ion cyclotron resonance (LC-FTICR) mass spectrometry. The ion population in the ICR cell was accurately controlled to a variety of different levels, which improved data quality and provided better mass measurement accuracy.

Page, Jason S.; Bogdanov, Bogdan; Vilkov, Andrey N.; Prior, David C.; Buschbach, Michael A.; Tang, Keqi; Smith, Richard D.

2005-02-01T23:59:59.000Z

365

Gain and tuning characteristics of mid-infrared InSb quantum dot diode lasers  

SciTech Connect (OSTI)

There have been relatively few reports of lasing from InSb quantum dots (QDs). In this work, type II InSb/InAs QD laser diodes emitting in the mid-infrared at 3.1??m have been demonstrated and characterized. The gain was determined to be 2.9?cm{sup ?1} per QD layer, and the waveguide loss was ?15?cm{sup ?1} at 4?K. Spontaneous emission measurements below threshold revealed a blue shift of the peak wavelength with increasing current, indicating filling of ground state heavy hole levels in the QDs. The characteristic temperature, T{sub 0}?=?101?K below 50?K, but decreased to 48?K at higher temperatures. The emission wavelength of these lasers showed first a blue shift followed by a red shift with increasing temperature. A hybrid structure was used to fabricate the laser by combining a liquid phase epitaxy grown p-InAs{sub 0.61}Sb{sub 0.13}P{sub 0.26} lower cladding layer and an upper n{sup +} InAs plasmon cladding layer which resulted in a maximum operating temperature (T{sub max}) of 120?K in pulsed mode, which is the highest reported to date.

Lu, Q.; Zhuang, Q.; Hayton, J.; Yin, M.; Krier, A. [Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)

2014-07-21T23:59:59.000Z

366

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

SciTech Connect (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

367

Inversion of Robin coefficient by a spectral stochastic finite element approach  

SciTech Connect (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 problem, and mathematical properties relevant to its numerical computations are investigated. The spectral stochastic finite element method using polynomial chaos is utilized for the discretization of the optimization problem, and its convergence is analyzed. The nonlinear conjugate gradient method is derived for the optimization system. Numerical results for several two-dimensional problems are presented to illustrate the accuracy and efficiency of the stochastic finite element method.

Jin Bangti [Department of Mathematics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong (China)], E-mail: kimbtsing@yahoo.com.cn; Zou Jun [Department of Mathematics, Chinese University of Hong Kong, Shatin, N.T., Hong Kong (China)], E-mail: zou@math.cuhk.edu.hk

2008-03-01T23:59:59.000Z

368

Lowest-order relativistic corrections to the fundamental limits of nonlinear-optical coefficients  

E-Print Network [OSTI]

The effects of small relativistic corrections to the off-resonant polarizability, hyperpolarizability, and second hyperpolarizability are investigated. Corrections to linear and nonlinear optical coefficients are demonstrated in the three-level ansatz, which includes corrections to the Kuzyk limits when scaled to semi-relativistic energies. It is also shown that the maximum value of the hyperpolarizability is more sensitive than the maximum polarizability or second hyperpolarizability to lowest-order relativistic corrections. These corrections illustrate how the intrinsic nonlinear-optical response is affected at semi-relativistic energies.

Nathan J. Dawson

2014-12-16T23:59:59.000Z

369

A comparison of experimental and theoretical results for rotordynamic coefficients for labyrinth gas seals  

E-Print Network [OSTI]

postulated, then it must be shaken ver tically about that same point in order to complete the identification process. Assuming harmonic vertical motion of the rotor, as defined by X=eo, XkO Y = A sin(Qt) + B cos(Qt), and AQ cos(Qt) ? BQ sin(Qt), 25...-coefficient-identification process described earlier, the external shaker method requires that the seal rotor be set in some static position and then oscillated about that 27 point. The test apparatus meets those requirements by providing independent static and dynamic...

Scharrer, Joseph Kirk

1985-01-01T23:59:59.000Z

370

Hall-Coefficient and Resistivity of Amorphous Ti1-Xalx Films  

E-Print Network [OSTI]

. INTRODUCTION The Hall coefficients of amorphous metals are general- ly positive when the alloy is dominated by an early- transition-metal component. (See reviews by Howson and Gallager, ' Mizutani, Naugle, and Naugle and Rhie. ) This has been thoroughly... investigated for early- transition-metal ?late-transition-metal (ETM-LTM) al- loys. The Zr-based amorphous alloys [Zr-Cu, ' Zr-Ni, Zr-Co, ' Zr-Fe (Refs. 8 and 11)] compose one of the most completely studied ETM-LTM alloy system. As the composition...

RATHNAYAKA, KDD; HENNINGS, BD; Naugle, Donald G.

1993-01-01T23:59:59.000Z

371

Heat transfer coefficients in two-dimensional Yukawa systems (numerical simulations)  

SciTech Connect (OSTI)

New data on heat transfer in two-dimensional Yukawa systems have been obtained. The results of a numerical study of the thermal conductivity for equilibrium systems with parameters close to the conditions of laboratory experiments in dusty plasma are presented. The Green-Kubo relations are used to calculate the heat transfer coefficients. The influence of dissipation (internal friction) on the heat transfer processes in nonideal systems is studied. New approximations are proposed for the thermal conductivity and diffusivity for nonideal dissipative systems. The results obtained are compared with the existing experimental and numerical data.

Khrustalyov, Yu. V., E-mail: yuri.khrustalyov@gmail.com; Vaulina, O. S. [Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation)

2013-05-15T23:59:59.000Z

372

Method for producing ceramic composition having low friction coefficient at high operating temperatures  

DOE Patents [OSTI]

A method for producing a stable ceramic composition having a surface with a low friction coefficient and high wear resistance at high operating temperatures. A first deposition of a thin film of a metal ion is made upon the surface of the ceramic composition and then a first ion implantation of at least a portion of the metal ion is made into the near surface region of the composition. The implantation mixes the metal ion and the ceramic composition to form a near surface composite. The near surface composite is then oxidized sufficiently at high oxidizing temperatures to form an oxide gradient layer in the surface of the ceramic composition.

Lankford, Jr., James (San Antonio, TX)

1988-01-01T23:59:59.000Z

373

Long-Time Dynamics of Variable Coefficient mKdV Solitary Waves  

E-Print Network [OSTI]

We study the Korteweg-de Vries-type equation dt u=-dx(dx^2 u+f(u)-B(t,x)u), where B is a small and bounded, slowly varying function and f is a nonlinearity. Many variable coefficient KdV-type equations can be rescaled into this equation. We study the long time behaviour of solutions with initial conditions close to a stable, B=0 solitary wave. We prove that for long time intervals, such solutions have the form of the solitary wave, whose centre and scale evolve according to a certain dynamical law involving the function B(t,x), plus an H^1-small fluctuation.

S. I. Dejak; B. L. G. Jonsson

2005-03-08T23:59:59.000Z

374

Numerical computation of aerodynamic sensitivity coefficients in the transonic and supersonic regimes  

E-Print Network [OSTI]

). Differentiating Eqs. (9) and (10) with respect to x and substituting the results into Eq. (8) yields For parabolic-arc sections Fu 1 - 2C(L-x)/LL ? w + 2T(1-2x) For NACA four-digit sections (11) Fu 1 - 2C(L-x)/LL + 5T(0. 14845/Jx-0. 126-0. 7032x+0. 8529x... by Leland A. Garison (Chair of Committee) Cyrus Ostowari (Member) Steven D. Talia erro (Member) W. E. Haisler (Head of Department) May 1988 ABSTRACT Numerical Computation of Aerodynamic Sensitivity Coefficients in the Transonic and Supersonic...

Elbanna, Hesham Mahmoud

1988-01-01T23:59:59.000Z

375

Economical Route to Produce High Seebeck Coefficient Calcium Cobaltate for Bulk Thermoelectric Applications  

SciTech Connect (OSTI)

Phase pure calcium cobaltate (Ca1.24Co1.62O3.86) was prepared by Self-propagating High-temperature Synthesis (SHS) followed by a short post heat treatment. Prepared powders were characterized by XRD for phase purity, and SEM for particle size and distribution. Temperature histories at the center and on the surface of reaction pellet during the SHS process were monitored and recorded. Particles size of synthesized powders was reduced using a planetary mill to increase its specific surface area. Electrical conductivity, thermal conductivity and Seebeck coefficient of the prepared power were measured and figure of merit was reported.

Selig, Jiri [Lamar University; Lin, Sidney [Lamar University; Lin, Hua-Tay [ORNL; Johnson, D Ray [ORNL; Wang, Hsin [ORNL

2011-01-01T23:59:59.000Z

376

A novel analytical operator method to solve linear ordinary differential equations with variable coefficients  

E-Print Network [OSTI]

A new analytical operator method is discussed which solves linear ordinary differential equations with regular singularities. Solutions are obtained in analytic series form and also in Mellin-Barnes-type contour integral form. Exact series solution is obtained without having to calculate series coefficients by recurrence relation.Both homogeneous and inhomogeneous equations are solved identically without having to calculate the Green's function explicitly in the case of inhomogeneous equation.Closed-form solutions are obtained for all the special functions appearing in mathematical physics. For a second-order equation both the independent solutions are obtained without invoking Wronskians, even when the indices differ by an integer.

Wrick Sengupta

2009-02-05T23:59:59.000Z

377

EUROPEAN TECHNOLOGY PLATFORM ON INDUSTRIAL SAFETY (ETPIS), A VISION TO GAIN SAFETY FOR A SUSTAINABLE INDUSTRY GROWTH  

E-Print Network [OSTI]

Safety (ETPIS). It is a result of a collective work made by research- ers from organisationsEUROPEAN TECHNOLOGY PLATFORM ON INDUSTRIAL SAFETY (ETPIS), A VISION TO GAIN SAFETY that consider industrial safety as a strategic issue for the sustainable growth of the European Industry

Paris-Sud XI, Université de

378

Measurement of positive gain on the 1315 nm transition of atomic iodine pumped by O2,,a1  

E-Print Network [OSTI]

state I 2 P3/2 . Conventionally, the O2 1 is produced by a liquid chemistry singlet oxygen generator of gain. © 2004 American Institute of Physics. [DOI: 10.1063/1.1784519] The classic chemical oxygen the metastable excited singlet oxygen molecule, O2 a1 [de- noted O2 1 hereafter], and the iodine atom ground

Carroll, David L.

379

Fuzzy-Logic-Based Gain-Scheduling Control for State-of-Charge Balance of Distributed Energy  

E-Print Network [OSTI]

Fuzzy-Logic-Based Gain-Scheduling Control for State-of-Charge Balance of Distributed Energy Storage, the control strategy used in the microgrid must take into account the stored energy balance between strategy based on fuzzy logic that ensures balanced stored energy among distributed energy storage units

Vasquez, Juan Carlos

380

Guaranteed stability regions of linear systems with actuator saturation using the low-and-high gain technique  

E-Print Network [OSTI]

constraints. Although its introduction in (Lin & Saberi1993) was fairly modest, it has since been used on predictive control. The low-and-high gain technique was introduced in Lin & Saberi (1995) as a method ensuring that the region in which stability was guaranteed did not shrink. With the work in Lin & Saberi

Turner, Matthew C.

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

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 with the power generation control in variable speed wind turbines. In this context, a control strategy is proposed to ensure power extraction optimization of a DFIG- based wind turbine. The proposed control

Brest, Université de

382

For natural ventilation to work, solar gains through the facade needed to be reduced by approximately 80% from  

E-Print Network [OSTI]

Engineers, Inc. Laboratory Consultant: Research Facilities Design Energy Modeling: SOLARC ArchitectureFor natural ventilation to work, solar gains through the facade needed to be reduced--largely due to the enormous ventilation demands and the energy associated with moving and conditioning

Hochberg, Michael

383

Femtosecond gain and index dynamics in an InAs/InGaAsP quantum dot amplifier  

E-Print Network [OSTI]

Femtosecond gain and index dynamics in an InAs/InGaAsP quantum dot amplifier operating at 1.55 µm and refractive index dynamics of an InAs/InGaAsP self-assembled quantum dot semiconductor optical amplifier (SOA-carrier absorption and stimulated transition processes. ©2006 Optical Society of America OCIS codes: (320

Mojahedi, Mohammad

384

Gain dynamics in a soft X-ray laser ampli er perturbed by a strong injected X-ray eld  

SciTech Connect (OSTI)

Seeding soft X-ray plasma ampli ers with high harmonics has been demonstrated to generate high-brightness soft X-ray laser pulses with full spatial and temporal coherence. The interaction between the injected coherent eld and the swept-gain medium has been modelled. However, no exper- iment has been conducted to probe the gain dynamics when perturbed by a strong external seed eld. Here, we report the rst X-ray pump X-ray probe measurement of the nonlinear response of a plasma ampli er perturbed by a strong soft X-ray ultra-short pulse. We injected a sequence of two time-delayed high-harmonic pulses (l518.9 nm) into a collisionally excited nickel-like molybdenum plasma to measure with femto-second resolution the gain depletion induced by the saturated ampli cation of the high-harmonic pump and its subsequent recovery. The measured fast gain recovery in 1.5 1.75 ps con rms the possibility to generate ultra-intense, fully phase-coherent soft X-ray lasers by chirped pulse ampli cation in plasma ampli ers.

Wang, Yong [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Wang, Shoujun [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Oliva, E [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Lu, L [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Berrill, Mark A [ORNL] [ORNL; Yin, Liang [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Nejdl, J [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Luther, Brad [Colorado State University, Fort Collins] [Colorado State University, Fort Collins; Proux, C [Laboratoire d’Optique Applique´e, ENSTA, CNRS, Ecole Polytechnique] [Laboratoire d’Optique Applique´e, ENSTA, CNRS, Ecole Polytechnique; Le, T. T. [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Dunn, James [Lawrence Livermore National Laboratory (LLNL)] [Lawrence Livermore National Laboratory (LLNL); Ros, D [Laboratoire de Physique des Gaz et des Gaz et des Plasmas] [Laboratoire de Physique des Gaz et des Gaz et des Plasmas; Zeitoun, Philippe [École Polytechnique] [École Polytechnique; Rocca, Jorge [Colorado State University, Fort Collins] [Colorado State University, Fort Collins

2014-01-01T23:59:59.000Z

385

Theoretical studies of optical gain tuning by hydrostatic pressure in GaInNAs/GaAs quantum wells  

SciTech Connect (OSTI)

In order to describe theoretically the tuning of the optical gain by hydrostatic pressure in GaInNAs/GaAs quantum wells (QWs), the optical gain calculations within kp approach were developed and applied for N-containing and N-free QWs. The electronic band structure and the optical gain for GaInNAs/GaAs QW were calculated within the 10-band kp model which takes into account the interaction of electron levels in the QW with the nitrogen resonant level in GaInNAs. It has been shown that this interaction increases with the hydrostatic pressure and as a result the optical gain for GaInNAs/GaAs QW decreases by about 40% and 80% for transverse electric and transverse magnetic modes, respectively, for the hydrostatic pressure change from 0 to 40 kilobars. Such an effect is not observed for N-free QWs where the dispersion of electron and hole energies remains unchanged with the hydrostatic pressure. This is due to the fact that the conduction and valence band potentials in GaInAs/GaAs QW scale linearly with the hydrostatic pressure.

Gladysiewicz, M.; Wartak, M. S. [Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw, Wybrzeze Wyspianskiego 27 (Poland); Department of Physics and Computer Science, Wilfrid Laurier University, Waterloo, Ontario N2L 3C5 (Canada); Kudrawiec, R. [Institute of Physics, Wroclaw University of Technology, 50-370 Wroclaw, Wybrzeze Wyspianskiego 27 (Poland)

2014-01-21T23:59:59.000Z

386

TOWARDS AN ER-DOPED SI NANOCRYSTAL SENSITIZED WAVEGUIDE LASER THE THIN LINE BETWEEN GAIN AND LOSS  

E-Print Network [OSTI]

and waveguide. If the pump laser could somehow be eliminated from this scheme, the fabrication of low-cost SiTOWARDS AN ER-DOPED SI NANOCRYSTAL SENSITIZED WAVEGUIDE LASER ­ THE THIN LINE BETWEEN GAIN AND LOSS-doped SiO2, a composite material that can potentially be fabricated using a VLSI compatible process

Kik, Pieter

387

Towards an Er-doped Si nanocrystal sensitized waveguide laser the thin line between gain and loss  

E-Print Network [OSTI]

somehow be eliminated from this scheme, the fabrication of low-cost Si based Er doped optical amplifiers1 Towards an Er-doped Si nanocrystal sensitized waveguide laser ­ the thin line between gain-doped Si nanocrystal co-doped SiO2, a composite material that can potentially be fabricated using a VLSI

Polman, Albert

388

AbstractThis paper presents an implementation of a networked PI controller using a gain scheduling methodology  

E-Print Network [OSTI]

Abstract­This paper presents an implementation of a networked PI controller using a gain scheduling scheduling technique is also explained. The detail of networked PI controller implementation based on RTLinux such as state augmentation [2], optimal stochastic control [3], and sampling time scheduling [4]. Many

Chow, Mo-Yuen

389

Influence of digestibility of bulky forages in daily gains in penned steers using two levels of supplemented grain  

E-Print Network [OSTI]

Influence of digestibility of bulky forages in daily gains in penned steers using two levels Experimental Agropecuaria, 2700 Pergamino, Buenos Aires, Argentina Digestibility of bulky forages directly, 95-121). In general there is more information about high quality forage digestibility than about low

Paris-Sud XI, Université de

390

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

E-Print Network [OSTI]

simulator FAST. Index Terms--Wind turbine (WT), Doubly-Fed Induction Generator (DFIG), high gain observer using the NREL wind turbine simulator FAST. II. WIND TURBINE MODELING The global scheme for a grid-connected shaft speed and thus maintaining optimal power generation. The more variable speed wind turbines

Paris-Sud XI, Université de

391

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

392

On the coefficients of the liquid drop model mass formulae and nuclear radii  

E-Print Network [OSTI]

The coefficients of different mass formulae derived from the liquid drop model and including or not the curvature energy, the diffuseness correction to the Coulomb energy, the charge exchange correction term, different forms of the Wigner term and different powers of the relative neutron excess $I=(N-Z)/A$ have been determined by a least square fitting procedure to 2027 experimental atomic masses. The Coulomb diffuseness correction $Z^2/A$ term or the charge exchange correction $Z^{4/3}/A^{1/3}$ term plays the main role to improve the accuracy of the mass formula. The Wigner term and the curvature energy can also be used separately for the same purpose. The introduction of an $|I|$ dependence in the surface and volume energies improves slightly the efficiency of the expansion and is more effective than an $I^4$ dependence. Different expressions reproducing the experimental nuclear charge radius are provided. The different fits lead to a surface energy coefficient of around 17-18 MeV and a relative equivalent rms charge radius r$_0$ of 1.22-1.23 fm.

G. Royer

2008-04-11T23:59:59.000Z

393

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

394

A rapid compression machine study of the oxidation of propane in the negative temperature coefficient regime  

SciTech Connect (OSTI)

The oxidation of propane has been studied in the temperature range 680-970 K at compressed gas pressures of 21, 27, and 37 atm and at varying equivalence ratios of 0.5, 1.0, and 2.0. These data are consistent with other experiments presented in the literature for alkane fuels in that, when ignition delay times are plotted as a function of temperature, a characteristic negative coefficient behavior is observed. In addition, these data were simulated using a detailed chemical kinetic model. It was found that qualitatively the model correctly simulated the effect of change in equivalence ratio and pressure, predicting that fuel-rich, high-pressure mixtures ignite fastest, while fuel-lean, low-pressure mixtures ignite slowest. Moreover, reactivity as a function of temperature is well captured, with the model predicting negative temperature coefficient behavior similar to the experiments. Quantitatively the model is faster than experiment for all mixtures at the lowest temperatures (650-750 K) and is also faster than experiment throughout the entire temperature range for fuel-lean mixtures. (author)

Gallagher, S.M.; Curran, H.J.; Metcalfe, W.K.; Healy, D.; Simmie, J.M. [Combustion Chemistry Centre, National University of Ireland, Galway (Ireland); Bourque, G. [Rolls-Royce Canada, Montreal (Canada)

2008-04-15T23:59:59.000Z

395

Control of linear modes in cylindrical resistive magnetohydrodynamics with a resistive wall, plasma rotation, and complex gain  

SciTech Connect (OSTI)

Feedback stabilization of magnetohydrodynamic (MHD) modes in a tokamak is studied in a cylindrical model with a resistive wall, plasma resistivity, viscosity, and toroidal rotation. The control is based on a linear combination of the normal and tangential components of the magnetic field just inside the resistive wall. The feedback includes complex gain, for both the normal and for the tangential components, and it is known that the imaginary part of the feedback for the former is equivalent to plasma rotation [J. M. Finn and L. Chacon, Phys. Plasmas 11, 1866 (2004)]. The work includes (1) analysis with a reduced resistive MHD model for a tokamak with finite ? and with stepfunction current density and pressure profiles, and (2) computations with a full compressible visco-resistive MHD model with smooth decreasing profiles of current density and pressure. The equilibria are stable for ??=?0 and the marginal stability values ?{sub rp,rw}?gain with normal sensors or plasma rotation stabilizes below ?{sub rp,iw} because rotation suppresses the diffusion of flux from the plasma out through the wall and, more surprisingly, (b) rotation or imaginary gain with normal sensors destabilizes above ?{sub rp,iw} because it prevents the feedback flux from entering the plasma through the resistive wall to form a virtual wall. A method of using complex gain G{sub i} to optimize in the presence of rotation in this regime with ??>??{sub rp,iw} is presented. The effect of imaginary gain with tangential sensors is more complicated but essentially destabilizes above and below ?{sub rp,iw}.

Brennan, D. P. [Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544 (United States); Finn, J. M. [Applied Mathematics and Plasma Physics, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2014-10-15T23:59:59.000Z

396

Internal Heat Transfer Coefficient Determination in a Packed Bed From the Transient Response Due to Solid Phase Induction Heating  

E-Print Network [OSTI]

the Hydraulic Drag and Heat Transfer Coefficients in PorousT. E. W. , 1929, “Heat Transfer: A Liquid Flowing Through a5] Locke, G. L. , 1950, “Heat Transfer and Flow Friction

Geb, David; Zhou, Feng; Catton, Ivan

2012-01-01T23:59:59.000Z

397

PTG exam 9 April 2014 short answers 123. Heat given off = surface * heat transfer coefficient * temperature = A * h * T  

E-Print Network [OSTI]

= Q34 = h4 ­ h3 = 2173,3 kJ/kg d. Heat input = Q15 = h1 ­ h5 = h1 ­ h4 + 4 (pump power) = 2831,0 kPTG exam 9 April 2014 short answers 123. Heat given off = surface * heat transfer coefficient * temperature = A * h * T Heat transfer coefficient from Nunumber, which for natural convection

Zevenhoven, Ron

398

The role of surface energy coefficients and nuclear surface diffuseness in the fusion of heavy-ions  

E-Print Network [OSTI]

We discuss the effect of surface energy coefficients as well as nuclear surface diffuseness in the proximity potential and ultimately in the fusion of heavy-ions. Here we employ different versions of surface energy coefficients. Our analysis reveals that these technical parameters can influence the fusion barriers by a significant amount. A best set of these parameters is also given that explains the experimental data nicely.

Ishwar Dutt; Rajeev K. Puri

2010-05-06T23:59:59.000Z

399

The interaction second virial coefficient for the ethane-carbon dioxide system between 250 and 300 K  

E-Print Network [OSTI]

THE INTERACTION SECOND VIRIAL COEFFICIENT FOR THE ETHANE-CARBON DIOXIDE SYSTEM BETWEEN 250 AND 300 K A Thesis by JOSEPH GLENN YOUNG Submitted to the Graduate College of Texas AAM University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1978 Major Subject: Chemical Engineering THE INTERACTION SECOND VIRIAL COEFFICIENT FOR THE ETHANE-CARBON DIOXIDE SYSTEM BETWEEN 250 AND 300 K A Thesis by JOSEPH GLENN YOUNG Approved as to style and content by...

Young, Joseph Glenn

1978-01-01T23:59:59.000Z

400

The shifted harmonic approximation and asymptotic SU(2) and SU(1,1) Clebsch--Gordan coefficients  

E-Print Network [OSTI]

Clebsch-Gordan coefficients of SU(2) and SU(1,1) are defined as eigenfunctions of a linear operator acting on the tensor product of the Hilbert spaces for two irreps of these groups. The shifted harmonic approximation is then used to solve these equations in asymptotic limits in which these eigenfunctions approach harmonic oscillator wave functions and thereby derive asymptotic expressions for these Clebsch--Gordan coefficients.

David J Rowe; Hubert de Guise

2010-11-29T23:59:59.000Z

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.


401

A comparison of experimental and theoretical results for leakage, pressure gradient, and rotordynamic coefficients for tapered annular gas seals  

E-Print Network [OSTI]

A COMPARISON OF EXPERIMENTAL AND THEORETICAL RESULTS FOR LEAKAGE, PRESSURE GRADIENT, AND ROTORDYNAMIC COEFFICIENTS FOR TAPERED ANNULAR GAS SEALS A Thesis by DAVID ALAN ELROD Submitted to the Graduate College of Texas A&M University... ABSTRACT A Compar ison of Experimental and Theoretical Results for Leakage, Pressure Gradient, and Rotordynamic Coefficients for Tapered Annular Gas Seals. (December 1986) David Alan Elrod, 8 . S . , Louisiana State University Co-Chairs of Advisory...

Elrod, David Alan

1986-01-01T23:59:59.000Z

402

A correlation for the coefficient of isothermal compressibility of black oil at pressures below the bubble point  

E-Print Network [OSTI]

A CORRELATION FOR THE COEFFICIENT OF ISOTHERMAL COMPRESSIBILITY OF BLACK OIL AT PRESSURES BELOW THE BUBBLE POINT A Thesis by ALEJANDRO J. VILLENA LAiVZI Submitted to the Graduate College of Texas AAM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1985 Major Subject: Petroleum Engineerrng A CORRELATION FOR THE COEFFICIENT OF ISOTHERMAL COMPRESSIBILITY OF BLACK OIL AT PRESSURES BELOW THE BUBBLE POINT A Thesis by ALEJANDRO J. VILLENA LANZI...

Villena Lanzi, Alejandro J

1985-01-01T23:59:59.000Z

403

Rotordynamic coefficients for shrouded pump impellers: comparisons between a new computer solution and test results  

E-Print Network [OSTI]

a, = f ? NiH (Mk) dV 4i k Jv() P a 12):f MkP (Nj) dV a14), =f M?G (N. ) dV ait), =f MkH(N ) dV 20 d) f, ()d-(i. (4 ) dd 0 f+d, 'Qd, , )dd 1=1 20 d ) f()=ddt. ( )dd 0 f d Qdd )dd 1=1 b, ) =f (), Ni (n vw) dS In the above equations: a. (e..., to be used as input to the perturbation analysis, are included in Appendix A. The assembled form of these equations can be written in the following compact form: [~] [g) =[a) (12) where [A] is the matrix of influence coefficients [I) is the vector...

Daniel, Arul Sathyasundar

1992-01-01T23:59:59.000Z

404

Numerical determination of OPE coefficients in the 3D Ising model from off-critical correlators  

E-Print Network [OSTI]

We propose a general method for the numerical evaluation of OPE coefficients in three dimensional Conformal Field Theories based on the study of the conformal perturbation of two point functions in the vicinity of the critical point. We test our proposal in the three dimensional Ising Model, looking at the magnetic perturbation of the $$, $$ and $$ correlators from which we extract the values of $C^{\\sigma}_{\\sigma\\epsilon}=1.07(3)$ and $C^{\\epsilon}_{\\epsilon\\epsilon}=1.45(30)$. Our estimate for $C^{\\sigma}_{\\sigma\\epsilon}$ agrees with those recently obtained using conformal bootstrap methods, while $C^{\\epsilon}_{\\epsilon\\epsilon}$, as far as we know, is new and could be used to further constrain conformal bootstrap analyses of the 3d Ising universality class.

Caselle, M; Magnoli, N

2015-01-01T23:59:59.000Z

405

Drag coefficient for the air-sea exchange: foam impact in hurricane conditions  

E-Print Network [OSTI]

A physical model is proposed for the estimation of the foam impact on the variation of the effective drag coefficient, C_d, with reference to the wind speed U10 in stormy and hurricane conditions. In the present model C_d is approximated by partitioning the sea surface into foam-covered and foam-free areas. Based on the available optical and radiometric measurements of the fractional foam coverage and the characteristic roughness of the sea-surface in the saturation limit of the foam coverage, the model yields the resulting dependence of C_d vs U10. This dependence is in fair agreement with that evaluated from field measurements of the vertical variation of the mean wind speed.

Golbraikh, Ephim

2014-01-01T23:59:59.000Z

406

Improved Coefficient Calculator for the California Energy Commission 6 Parameter Photovoltaic Module Model  

SciTech Connect (OSTI)

This paper describes an improved algorithm for calculating the six parameters required by the California Energy Commission (CEC) photovoltaic (PV) Calculator module model. Rebate applications in California require results from the CEC PV model, and thus depend on an up-to-date database of module characteristics. Currently, adding new modules to the database requires calculating operational coefficients using a general purpose equation solver - a cumbersome process for the 300+ modules added on average every month. The combination of empirical regressions and heuristic methods presented herein achieve automated convergence for 99.87% of the 5487 modules in the CEC database and greatly enhance the accuracy and efficiency by which new modules can be characterized and approved for use. The added robustness also permits general purpose use of the CEC/6 parameter module model by modelers and system analysts when standard module specifications are known, even if the module does not exist in a preprocessed database.

Dobos, A. P.

2012-05-01T23:59:59.000Z

407

Partition coefficients of substrates and products and solvent selection for biocatalysis under nearly anhydrous conditions  

SciTech Connect (OSTI)

The effect of solvent on the activity of mushroom tyrosinase toward three substrates was studied at a constant water activity of either 0.74 or 0.86. No simple correlation was observed between enzyme activity and log P, but partition coefficients of substrate (P[sub s]) and product (P[sub p]) gave systematic relations with enzyme activity. When initial reaction rates were considered, there was a bell-shaped relationship between enzyme and P[sub s] with an optimal P[sub s] for each substrate. This can be explained by assuming that the solvent affected the enzyme activity primarily by affecting the substrate concentration in the aqueous layer around the catalyst where the enzymic reaction occurs. When long-term reaction rates were considered, a high P[sub p]/P[sub s] ratio was consistent with preservation of enzyme activity.

Yang, Zhen; Robb, D.A. (Univ. of Strathclyde, Glasgow (United Kingdom). Dept. of Bioscience and Biotechnology)

1994-03-05T23:59:59.000Z

408

Systematics of the Relationship between Vacuum Energy Calculations and Heat Kernel Coefficients  

E-Print Network [OSTI]

Casimir energy is a nonlocal effect; its magnitude cannot be deduced from heat kernel expansions, even those including the integrated boundary terms. On the other hand, it is known that the divergent terms in the regularized (but not yet renormalized) total vacuum energy are associated with the heat kernel coefficients. Here a recent study of the relations among the eigenvalue density, the heat kernel, and the integral kernel of the operator $e^{-t\\sqrt{H}}$ is exploited to characterize this association completely. Various previously isolated observations about the structure of the regularized energy emerge naturally. For over 20 years controversies have persisted stemming from the fact that certain (presumably physically meaningful) terms in the renormalized vacuum energy density in the interior of a cavity become singular at the boundary and correlate to certain divergent terms in the regularized total energy. The point of view of the present paper promises to help resolve these issues.

S. A. Fulling

2003-04-03T23:59:59.000Z

409

Surface diffusion coefficient of Au atoms on single layer graphene grown on Cu  

SciTech Connect (OSTI)

A 5?nm thick Au film was deposited on single layer graphene sheets grown on Cu. By thermal processes, the dewetting phenomenon of the Au film on the graphene was induced so to form Au nanoparticles. The mean radius, surface-to-surface distance, and surface density evolution of the nanoparticles on the graphene sheets as a function of the annealing temperature were quantified by scanning electron microscopy analyses. These quantitative data were analyzed within the classical mean-field nucleation theory so to obtain the temperature-dependent Au atoms surface diffusion coefficient on graphene: D{sub S}(T)=[(8.2±0.6)×10{sup ?8}]exp[?(0.31±0.02(eV)/(at) )/kT]?cm{sup 2}/s.

Ruffino, F., E-mail: francesco.ruffino@ct.infn.it; Cacciato, G.; Grimaldi, M. G. [Dipartimento di Fisica ed Astronomia-Universitá di Catania, via S. Sofia 64, 95123 Catania, Italy and MATIS IMM-CNR, via S. Sofia 64, 95123 Catania (Italy)

2014-02-28T23:59:59.000Z

410

QSAR OF DISTRIBUTION COEFFICIENTS FOR PU (NO3)062-COMPLEXES USING MOLECULAR MECHANICS  

SciTech Connect (OSTI)

Computer-aided modeling has been very successful in the design of chelating ligands for the formation of selective metal complexes. We report herein preliminary efforts to extend the principles developed for ion-specific chelating ligands to the weaker, more diffuse electrostatic interactions between complex anions and dicationic sites of anion-exchange resins. Calculated electrostatic affinity between plutonium (IV) hexanitrato dianions and analogue of dicationic anion-exchange sites correlate well with empirically-determined distribution coefficients. This Quantitative Structure Activity Relationship (QSAR) is useful in the determination of the overall trend within a select series of bifunctional resins and which structural modifications are most likely to be advantageous. Ultimately, we hope to refine this methodology to allow the a priori determination of ion-exchange behavior for abroad class of materials.

M. BARR; G. JARVINEN; E. MOODY

2000-08-01T23:59:59.000Z

411

The effect of gravel size fraction on the distribution coefficients of selected radionuclides radionuclides  

SciTech Connect (OSTI)

This manuscript addresses the consequences of the common practice of assuming that the gravel fraction of sediments does not participate in sorption reactions and thus sorption quantified by the distribution coefficient (Kd) construct can be estimated from laboratory tests on < 2mm fraction of sediments. As shown within the use of this common assumption can lead to inaccurate estimates of the mobility and sorption capacity of key radionuclides (Tc, U, and Np) at the Hanford Site where gravel dominates the lower Hanford formation and upper Ringold Formation. Batch sorption and column experiments showed that the distribution coefficient measured using only < 2mm fraction were not in agreement with those obtained from the bulk sediments depending on the radionuclide. The least reactive radionuclide, Tc showed the lowest effects from the presence of gravel. However, differences between measured Kds using < 2mm fractions of the sediment and the Kds measured on the bulk sediment were significant for strongly reactive radionuclides such as Np, especially on the sediment with gravel fractions that contained highly reactive sites. Highly reactive sites in the gravel fraction were attributed to the presence of Fe oxides coatings and/or reactive fracture faces on the gravel surfaces. Gravel correction factors that use the sum of the Kd,<2 mm and Kd,>2 mm values to estimate the Kd for the bulk sediment were found to best describe Kds for radionuclides on the bulk sediment. However, more detailed characterization of gravel surfaces should be also conducted to identify those gravels with higher reactive sorbents, if present. Gravel correction factors should be considered to predict precisely the sorption capacity of bulk sediments that contain more than 10% gravel and to estimate the mobility of contaminants in subsurface environments.

Um, Wooyong; Serne, R. Jeffrey; Last, George V.; Glossbrenner, Ellwood T.

2009-06-26T23:59:59.000Z

412

The effect of gravel size fraction on the distribution coefficients of selected radionuclides  

SciTech Connect (OSTI)

This manuscript addresses the consequences of the common practice of assuming that the gravel fraction of sediments does not participate in sorption reactions and thus sorption quantified by the distribution coefficient (Kd) construct can be estimated from laboratory tests on sediments less than 2 mm size fraction. However, this common assumption can lead to inaccurate estimates of the mobility and sorption affinity of many radionuclides (e.g., Tc, U, and Np) on gravel dominated sediments at the Hanford Site and other locations. Laboratory batch sorption experiments showed that the distribution coefficients measured using only sediment less than 2 mm size fraction and correcting for inert gravel fraction were not in agreement with those obtained from the bulk sediments including gravel (larger than 2 mm size fraction), depending on the radionuclide. The least reactive radionuclide, Tc had Kd values for bulk sediment with negligible deviations from the inert gravel corrected Kd values measured on less than 2 mm size fraction. However, differences between measured Kd values using sediment less than 2 mm size fraction and the Kd values on the bulk sediment were significant for intermediately and strongly reactive radionuclides such as U and Np, especially on the sediment with gravel fractions that contained highly reactive sites. Highly reactive sites in the gravel fraction were attributed to the presence of Fe oxide coatings and/or reactive fracture faces on the gravel surfaces. Gravel correction factors that use the sum of the Kd,<2 mm and Kd,>2 mm values to estimate the Kd for the bulk sediment were found to best describe Kd values for radionuclides on the bulk sediment. Gravel correction factors should not be neglected to predict precisely the sorption capacity of the bulk sediments that contain more than 30% gravel. In addition, more detailed characterization of gravel surfaces should be conducted to identify whether higher reactive sorbents are present in the gravels.

Um, Wooyong; Serne, R. Jeffrey; Last, George V.; Clayton, Ray E.; Glossbrenner, Ellwood T.

2009-06-26T23:59:59.000Z

413

Ceramic materials with low thermal conductivity and low coefficients of thermal expansion  

DOE Patents [OSTI]

Compositions having the general formula (Ca.sub.x Mg.sub.1-x)Zr.sub.4 (PO.sub.4).sub.6 where x is between 0.5 and 0.99 are produced by solid state and sol-gel processes. In a preferred embodiment, when x is between 0.5 and 0.8, the MgCZP materials have near-zero coefficients of thermal expansion. The MgCZPs of the present invention also show unusually low thermal conductivities, and are stable at high temperatures. Macrostructures formed from MgCZP are useful in a wide variety of high-temperature applications. In a preferred process, calcium, magnesium, and zirconium nitrate solutions have their pH adjusted to between 7 and 9 either before or after the addition of ammonium dihydrogen phosphate. After dehydration to a gel, and calcination at temperatures in excess of 850.degree. C. for approximately 16 hours, single phase crystalline MgCZP powders with particle sizes ranging from approximately 20 nm to 50 nm result. The MgCZP powders are then sintered at temperatures ranging from 1200.degree. C. to 1350.degree. C. to form solid macrostructures with near-zero bulk coefficients of thermal expansion and low thermal conductivities. Porous macrostructures of the MgCZP powders of the present invention are also formed by combination with a polymeric powder and a binding agent, and sintering at high temperatures. The porosity of the resulting macrostructures can be adjusted by varying the particle size of the polymeric powder used.

Brown, Jesse (Christiansburg, VA); Hirschfeld, Deidre (Elliston, VA); Liu, Dean-Mo (Blacksburg, VA); Yang, Yaping (Blacksburg, VA); Li, Tingkai (Blacksburg, VA); Swanson, Robert E. (Blacksburg, VA); Van Aken, Steven (Blacksburg, VA); Kim, Jin-Min (Seoul, KR)

1992-01-01T23:59:59.000Z

414

Ceramic materials with low thermal conductivity and low coefficients of thermal expansion  

DOE Patents [OSTI]

Compositions, having the general formula (Ca[sub x]Mg[sub 1[minus]x])Zr[sub 4](PO[sub 4])[sub 6] where x is between 0.5 and 0.99, are produced by solid state and sol-gel processes. In a preferred embodiment, when x is between 0.5 and 0.8, the MgCZP materials have near-zero coefficients of thermal expansion. The MgCZPs of the present invention also show unusually low thermal conductivities, and are stable at high temperatures. Macrostructures formed from MgCZP are useful in a wide variety of high-temperature applications. In a preferred process, calcium, magnesium, and zirconium nitrate solutions have their pH adjusted to between 7 and 9 either before or after the addition of ammonium dihydrogen phosphate. After dehydration to a gel, and calcination at temperatures in excess of 850 C for approximately 16 hours, single phase crystalline MgCZP powders with particle sizes ranging from approximately 20 nm to 50 nm result. The MgCZP powders are then sintered at temperatures ranging from 1200 C to 1350 C to form solid macrostructures with near-zero bulk coefficients of thermal expansion and low thermal conductivities. Porous macrostructures of the MgCZP powders of the present invention are also formed by combination with a polymeric powder and a binding agent, and sintering at high temperatures. The porosity of the resulting macrostructures can be adjusted by varying the particle size of the polymeric powder used. 7 figs.

Brown, J.; Hirschfeld, D.; Liu, D.M.; Yang, Y.; Li, T.; Swanson, R.E.; Van Aken, S.; Kim, J.M.

1992-04-07T23:59:59.000Z

415

Biochemical studies concerning the relationship of various blood and urine constituents to rate of gain in young beef animals  

E-Print Network [OSTI]

of gain in beef animals~ it seeesg XogLoal thai the Xoeele af aortain nutrient blocaL ocaayoneccte shouM be ~sureiL in tbe Xabesatory in this search for a gsoeth incLm, eLnoe these bloog eaterials sores as tbe buUcLing stones fcn groeth anc...LNaLLeae NLe14eLLeal eeelyreLe eae ayykh4 Le eD data ebLaLee4 La %a abeea 4eLeeaLIaaLeae La aa aeLeeLA ee ~L? aey et 4h~ btee4 eeaeLL|eeaLe eLLb eaLe et NsLa et ebe ~i StcaKes bass been oocduotcd oonoercdng possible correlations between rate of gain in bsof...

Ware, James Harold

2012-06-07T23:59:59.000Z

416

IEEEJOURNAL OF QUANTUMELECTRONICS, VOL. QE-21,NO. 7, JULY 1985 831 High-Gain Free Electron Lasers Using Induction  

E-Print Network [OSTI]

of producing intense cwrents (102-104A) at moderately high energy (1-50 MeV). Experiments using a 500 A, 3.3 Me of Energy under Contracts W- Research Projects Agency under ARPA Order 4856, Program Code 3B10. T. J. Future experi- ments include a high-gain, high-efficiency FEL operating at 10.6 pm using a 50 MeV beam. I

Wurtele, Jonathan

417

Study of gain and photoresponse characteristics for back-illuminated separate absorption and multiplication GaN avalanche photodiodes  

SciTech Connect (OSTI)

The gain and photoresponse characteristics have been numerically studied for back-illuminated separate absorption and multiplication (SAM) GaN avalanche photodiodes (APDs). The parameters of fundamental models are calibrated by simultaneously comparing the simulated dark and light current characteristics with the experimental results. Effects of environmental temperatures and device dimensions on gain characteristics have been investigated, and a method to achieve the optimum thickness of charge layer is obtained. The dependence of gain characteristics and breakdown voltage on the doping concentration of the charge layer is also studied in detail to get the optimal charge layer. The bias-dependent spectral responsivity and quantum efficiency are then presented to study the photoresponse mechanisms inside SAM GaN APDs. It is found the responsivity peak red-shifts at first due to the Franz-Keldysh effect and then blue-shifts due to the reach-through effect of the absorption layer. Finally, a new SAM GaN/AlGaN heterojunction APD structure is proposed for optimizing SAM GaN APDs.

Wang, Xiaodong; Pan, Ming; Hou, Liwei; Xie, Wei [No. 50 Research Institute of China Electronics Technology Group Corporation, 200331 Shanghai (China); Hu, Weida, E-mail: wdhu@mail.sitp.ac.cn; Xu, Jintong; Li, Xiangyang; Chen, Xiaoshuang, E-mail: xschen@mail.sitp.ac.cn; Lu, Wei [National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 200083 Shanghai (China)

2014-01-07T23:59:59.000Z

418

Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign  

SciTech Connect (OSTI)

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

419

Backscattering and absorption coefficients for electrons: Solutions of invariant embedding transport equations using a method of convergence  

SciTech Connect (OSTI)

The backscattering coefficient is a magnitude whose measurement is fundamental for the characterization of materials with techniques that make use of particle beams and particularly when performing microanalysis. In this work, we report the results of an analytic method to calculate the backscattering and absorption coefficients of electrons in similar conditions to those of electron probe microanalysis. Starting on a five level states ladder model in 3D, we deduced a set of integro-differential coupled equations of the coefficients with a method know as invariant embedding. By means of a procedure proposed by authors, called method of convergence, two types of approximate solutions for the set of equations, namely complete and simple solutions, can be obtained. Although the simple solutions were initially proposed as auxiliary forms to solve higher rank equations, they turned out to be also useful for the estimation of the aforementioned coefficients. In previous reports, we have presented results obtained with the complete solutions. In this paper, we present results obtained with the simple solutions of the coefficients, which exhibit a good degree of fit with the experimental data. Both the model and the calculation method presented here can be generalized to other techniques that make use of different sorts of particle beams.

Figueroa, C.; Brizuela, H.; Heluani, S. P. [Laboratorio de Física del Sólido, Dpto. de Física, Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán (Argentina)

2014-05-21T23:59:59.000Z

420

Matlab's Loss is Nobody's Gain Created Aug. 1998, revised July 31, 2004 http://www.cs.berkeley.edu/~wkahan/MxMulEps.pdf Page 1/36  

E-Print Network [OSTI]

Matlab's Loss is Nobody's Gain Created Aug. 1998, revised July 31, 2004 http://www.cs.berkeley.edu/~wkahan/MxMulEps.pdf Page 1/36 Matlab's Loss is Nobody's Gain Prof. W. Kahan Mathematics Dept. & Elect. Eng. & Computer Sci. Dept. University of California Berkeley CA 94720-1776 Abstract: Matlab has become the software package

California at Berkeley, University of

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

The power gain is the ratio of the power delivered to the load to the power delivered to the input of the amplifier [2].  

E-Print Network [OSTI]

1 The power gain is the ratio of the power delivered to the load to the power delivered to the input of the amplifier [2]. 2 The transducer gain is the ratio of the power delivered to the load to the available power of the source [2] and is a function of the source impedance. If the source impedance has

Groppi, Christopher

422

UoE Employees How to gain access to internal vacancies As a current University employee, you will be eligible to access (via the jobs site) vacancies  

E-Print Network [OSTI]

UoE Employees ­ How to gain access to internal vacancies As a current University employee, you will be eligible to access (via the jobs site) vacancies advertised internally, in addition to those advertised gain access to all vacancies (including those advertised to internal applicants only) whenever you log

Edinburgh, University of

423

Electron Transport Coefficients and Scattering Cross Sections in CH4, HBr and in Mixtures of He and Xe  

SciTech Connect (OSTI)

We have applied a standard swarm procedure in order to obtain electron scattering cross sections and transport coefficients that provide a data base for plasma modeling. In case of CH4 the dissociative excitation cross sections from binary collision experiments were renormalized by fitting the measured excitation coefficients with our calculations. In case of HBr we have produced a complete set of cross sections based on available data from the literature, with some extrapolations. We have also tested the cross sections in He-Xe mixtures and the application of Blanc's law and common mean energy procedure in calculating drift velocities in by comparison with recent measurements. Finally, a well tested Monte Carlo code was used in wide range of both DC and RF electric and magnetic fields in order to calculate a number of transport coefficients in case of CH4 and HBr.

Sasic, Olivera M. [Institute of Physics, POB 68, 11080 Belgrade (Serbia and Montenegro); Faculty of Transport and Traffic Engineering, Belgrade (Serbia and Montenegro)

2006-12-01T23:59:59.000Z

424

Impurity Diffusion Coefficients of Al and Zn in Mg Determined from Solid-to-Solid Diffusion Couples  

SciTech Connect (OSTI)

Increasing use and development of lightweight Mgalloys have led to the desire for more fundamental research in and understanding of Mg-based systems. As property enhancing components, Al and Zn are two of the most important and common alloying elements for Mg-alloys. We have investigated the concentration dependent interdiffusion of Al and Zn in Mg using diffusion couples of pure polycrystalline Mg mated to Mg solid solutions containing either <9 at.% Al or <3 at.% Zn. Concentration profiles were determined by electron micro-probe microanalysis of the diffusion zone. The interdiffusion coefficients were determined by the classical Boltzmann-Matano method within the Mg solid solution. As the concentration of Al or Zn approaches the dilute ends, we employ an analytical approach based on the Hall method to estimate the impurity diffusion coefficients. Results of Al and Zn impurity diffusion in Mg are reported and compared to published impurity diffusion coefficients typically determined by thin film techniques.

Kammerer, Catherine [University of Central Florida, Orlando; Kulkarni, Nagraj S [ORNL; Warmack, Robert J Bruce [ORNL; Perry, Kelly A [ORNL; Belova, Irina [University of Newcastle, NSW, Australia; Murch, Prof. Graeme [University of Newcastle, NSW, Australia; Sohn, Yong Ho [University of Central Florida

2013-08-01T23:59:59.000Z

425

Measurement and modeling of infrared nonlinear absorption coefficients and laser-induced damage thresholds in Ge and GaSb  

SciTech Connect (OSTI)

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

426

Blackness coefficients, effective diffusion parameters, and control rod worths for thermal reactors  

SciTech Connect (OSTI)

Simple diffusion theory cannot be used to evaluate control rod worths in thermal reactors because of the strongly absorbing character of the control material. However, good results can be obtained from a diffusion calculation by representing the absorber slab by means of a suitable pair of internal boundary conditions, ..cap alpha.. and ..beta.., which are ratios of neutron flux to neutron current. Methods for calculating ..cap alpha.. and ..beta.. in the P/sub 1/, P/sub 3/, and P/sub 5/ approximations, with and without scattering, are presented. By appropriately weighting the fine-group blackness coefficients, broad group values, <..cap alpha..> and <..beta..>, are obtained. The technique is applied to the calculation of control rod worths of Cd, Ag-In-Cd, and Hf control elements. Results are found to compare very favorably with detailed Monte Carlo calculations. For control elements whose geometry does not permit a thin slab treatment, other methods are needed for determining the effective diffusion parameters. One such method is briefly discussed and applied to the calculation of control rod worths in the Ford Nuclear Reactor at the University of Michigan. Calculated and measured worths are found to be in good agreement.

Bretscher, M.M.

1984-09-01T23:59:59.000Z

427

Measurements of the hydrogenic recombination coefficient for the TFTR vacuum vessel  

SciTech Connect (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

428

Ionization rate coefficients and induction times in nitrogen at high values of E/N  

SciTech Connect (OSTI)

Electron-impact ionization rate coefficients in nitrogen at values of E/N, the ratio of the electric field to the neutral density, up to 12 000 Td (1 Td = 10/sup -17/ V cmS), are reported. In addition, we report experimental measurements of the ionization induction time, the time during the early portion of an applied electric field when the electron energy distribution function is transient and the plasma is characterized by nonexponential growth of the electron density. For nitrogen, we show that the induction period is approximately equal to the inverse of the ionization frequency for a large E/N range. Time-dependent Boltzmann calculations of the electron energy distribution function yield instantaneous ionization rates that are in good agreement with both the measured ionization rates and the induction period. The measurements were made in an electrodeless cell contained in an S-band waveguide immersed in a dc magnetic field and subjected to a pulsed rf electric field at cyclotron resonance. We show that our measurements are equivalent to experiments in dc electric fields; the equivalent dc electric field strength being uniquely related to the rf electric field strength. The use of an rf field for these high-E/N measurements circumvents complications that would be introduced by electrode effects. This is the first direct measurement of ionization rates at these extreme values of E/N.

Hays, G.N.; Pitchford, L.C.; Gerardo, J.B.; Verdeyen, J.T.; Li, Y.M.

1987-09-01T23:59:59.000Z

429

Study of the absorption coefficient of alpha particles to lower hybrid waves in tokamak  

SciTech Connect (OSTI)

Part of the energy of the Lower Hybrid (LH) waves may be absorbed by the ? particles via the so-called perpendicular landau damping mechanism, which depends on various parameters of fusion reactors and the LH waves. In this article, we calculate the absorption coefficient ?{sub ?} of LH waves due to ? particles. Results show that, the ?{sub ?} increases with the parallel refraction index n{sub ?} while deceases with increasing the frequency of LH waves ?{sub LH} over a wide range. Higher background plasma temperature and toroidal magnetic field will increase the absorption, and there is a peak value of ?{sub ?} when n{sub e}?8×10{sup 19}m{sup ?3} for ITER-like scenario. The thermal corrections to the cold plasma dispersion relation will change the damping rate to a certain extent under some specific conditions. We have also evaluated the fraction of LH power absorbed by the alpha particles, ? ? 0.47% and 4.1% for an LH frequency of 5 GHz and 3.7 GHz respectively for ITER-like scenario. This work gives the effective reference for the choice of parameters of future fusion reactors.

Wang, Jianbing, E-mail: zhangxm@ecust.edu.cn; Zhang, Xianmei, E-mail: zhangxm@ecust.edu.cn; Yu, Limin, E-mail: zhangxm@ecust.edu.cn; Zhao, Xiang, E-mail: zhangxm@ecust.edu.cn [Department of Physics, East China University of Science and Technology, P.O. Box 385, Shanghai 200237 (China)

2014-02-12T23:59:59.000Z

430

Strontium distribution coefficients of surficial sediment samples from the Idaho National Engineering Laboratory, Idaho  

SciTech Connect (OSTI)

Strontium distribution coefficients (K{sub d}`s) were measured for 20 surficial sediment samples collected from selected sites at the Idaho national Engineering Laboratory (INEL). The measurements were made to help assess the variability of strontium K{sub d}`s found at the INEL as part of an ongoing investigation of strontium chemical transport properties of surficial and interbedded sediments at the INEL. The investigation is being conducted by the US Geological Survey and Idaho State University in cooperation with the US Department of Energy. Batch experimental techniques wee used to determine K{sub d}`s of surficial sediments using a synthesized aqueous solution representative of wastewater in waste disposal ponds at the INEL. Strontium K{sub d}`s of the 20 surficial sediments ranged from 36 {+-} 1 to 275 {+-} 6 milliliters per gram. These results indicate significant variability in the strontium sorptive capacities of surficial sediments at the INEL. Some of this variability can be attributed to physical and chemical properties of the sediment itself; however, the remainder of the variability may be due to compositional changes in the equilibrated solutions after being mixed with the sediment.

Liszewski, M.J.; Miller, K.E. [Geological Survey, Idaho Falls, ID (United States); Rosentreter, J.J. [Idaho State Univ., Idaho Falls, ID (United States)

1997-05-01T23:59:59.000Z

431

On the use of age-specific effective dose coefficients in radiation protection of the public  

SciTech Connect (OSTI)

Current radiation protection standards for the public include a limit on effective dose in any year for individuals in critical groups. This paper considers the question of how the annual dose limit should be applied in controlling routine exposures of populations consisting of individuals of all ages. The authors assume that the fundamental objective of radiation protection is limitation of lifetime risk and, therefore, that standards for controlling routine exposures of the public should provide a reasonable correspondence with lifetime risk, taking into account the age dependence of intakes and doses and the variety of radionuclides and exposure pathways of concern. Using new calculations of the per capita (population-averaged) risk of cancer mortality per unit activity inhaled or ingested in the US Environmental Protection Agency`s Federal Guidance Report No. 13, the authors show that applying a limit on annual effective dose only to adults, which was the usual practice in radiation protection of the public before the development of age-specific effective dose coefficients, provides a considerably better correspondence with lifetime risk than applying the annual dose limit to the critical group of any age.

Kocher, D.C.; Eckerman, K.F.

1998-11-01T23:59:59.000Z

432

Rate coefficient for the chemi-ionization in slow Li*(n)+Li and Na*(n)+Na collisions  

SciTech Connect (OSTI)

The chemi-ionization processes in slow-atom-Rydberg-atom collisions are considered in this paper. A version of the semiclassical method of rate coefficient calculation that is free of the presumptions which significantly limited its applicability previously is presented. The method is applied to the cases of Li*(n)+Li and Na*(n)+Na collisions for the principal quantum numbers 5{<=}n{<=}25 and temperatures 600{<=}T{<=}1200 K. The results of calculation of the rate coefficients of the corresponding chemi-ionization processes are compared to the existing experimental data from the literature.

Ignjatovic, Lj.M.; Mihajlov, A.A. [Institute of Physics, P. O. Box 68, 11080 Zemun, Belgrade (Serbia and Montenegro)

2005-08-15T23:59:59.000Z

433

The screen representation of vector coupling coefficients or Wigner 3j symbols: exact computation and illustration of the asymptotic behavior  

E-Print Network [OSTI]

The Wigner $3j$ symbols of the quantum angular momentum theory are related to the vector coupling or Clebsch-Gordan coefficients and to the Hahn and dual Hahn polynomials of the discrete orthogonal hyperspherical family, of use in discretization approximations. We point out the important role of the Regge symmetries for defining the screen where images of the coefficients are projected, and for discussing their asymptotic properties and semiclassical behavior. Recursion relationships are formulated as eigenvalue equations, and exploited both for computational purposes and for physical interpretations.

Ana Carla P. Bitencourt; Mirco Ragni; Robert G. Littlejohn; Roger Anderson; Vincenzo Aquilanti

2014-09-29T23:59:59.000Z

434

Performance of the Gas Gain Monitoring system of the CMS RPC muon detector and effective working point fine tuning  

E-Print Network [OSTI]

The Gas Gain Monitoring (GGM) system of the Resistive Plate Chamber (RPC) muon detector in the Compact Muon Solenoid (CMS) experiment provides fast and accurate determination of the stability in the working point conditions due to gas mixture changes in the closed loop recirculation system. In 2011 the GGM began to operate using a feedback algorithm to control the applied voltage, in order to keep the GGM response insensitive to environmental temperature and atmospheric pressure variations. Recent results are presented on the feedback method used and on alternative algorithms.

S. Colafranceschi; L. Benussi; S. Bianco; L. Passamonti; D. Piccolo; D. Pierluigi; A. Russo; G. Saviano; C. Vendittozzi; M. Abbrescia; A. Aleksandrov; U. Berzano; C. Calabria; C. Carrillo; A. Colaleo; V. Genchev; P. Iaydjiev; M. Kang; K. S. Lee; F. Loddo; S. K. Park; G. Pugliese; M. Maggi; S. Shin; M. Rodozov; M. Shopova; G. Sultanov; P. Verwillingen

2012-09-18T23:59:59.000Z

435

Critical coupling and coherent perfect absorption for ranges of energies due to a complex gain and loss symmetric system  

E-Print Network [OSTI]

We consider a non-Hermitian medium with a gain and loss symmetric, exponentially damped potential distribution to demonstrate different scattering features analytically. The condition for critical coupling (CC) for unidirectional wave and coherent perfect absorption (CPA) for bidirectional waves are obtained analytically for this system. The energy points at which total absorption occurs are shown to be the spectral singular points for the time reversed system. The possible energies at which CC occurs for left and right incidence are different. We further obtain periodic intervals with increasing periodicity of energy for CC and CPA to occur in this system.

Mohammad Hasan; Ananya Ghatak; Bhabani Prasad Mandal

2014-03-03T23:59:59.000Z

436

Absorption, emission, and gain spectra of 1. 3. mu. m InGaAsP quaternary lasers  

SciTech Connect (OSTI)

The spontaneous emission spectrum of mesa lasers was analyzed to determine the absorption and gain spectra at threshold. The radiative current density at threshold was found to be 4.4 kA cm/sup -2/ ..mu..m/sup -1/, which is 60 percent of the total current density for the lowest threshold mesa laser. The increase in radiative lifetime due to reabsorption of emitted radiation was calculated to be 1.5, using the measured absorption and emission spectra. Contrary to other studies, this investigation of an LED and 3 lasers of different types yielded no evidence of carrier heating.

Henry, C.H.; Logan, R.A.; Merritt, F.R.; Temkin, H.

1983-06-01T23:59:59.000Z

437

Modeling of optical amplifier waveguide based on silicon nanostructures and rare earth ions doped silica matrix gain media by a finite-difference time-domain method: comparison of achievable gain with Er3+ or Nd3+ ions dopants  

E-Print Network [OSTI]

A comparative study of the gain achievement is performed in a waveguide optical amplifier whose active layer is constituted by a silica matrix containing silicon nanograins acting as sensitizer of either neodymium ions (Nd 3+) or erbium ions (Er 3+). Due to the large difference between population levels characteristic times (ms) and finite-difference time step (10 --17 s), the conventional auxiliary differential equation and finite-difference time-domain (ADE-FDTD) method is not appropriate to treat such systems. Consequently, a new two loops algorithm based on ADE-FDTD method is presented in order to model this waveguide optical amplifier. We investigate the steady states regime of both rare earth ions and silicon nanograins levels populations as well as the electromagnetic field for different pumping powers ranging from 1 to 10 4 mW.mm-2. Furthermore, the three dimensional distribution of achievable gain per unit length has been estimated in this pumping range. The Nd 3+ doped waveguide shows a higher gross...

Cardin, Julien; Dufour, Christian; Gourbilleau, Fabrice

2015-01-01T23:59:59.000Z

438

Magnetoconvection and dynamo coefficients III: alpha-effect and magnetic pumping in the rapid rotation regime  

E-Print Network [OSTI]

Aims. The alpha- and gamma-effects, which are responsible for the generation and turbulent pumping of large scale magnetic fields, respectively, due to passive advection by convection are determined in the rapid rotation regime corresponding to the deep layers of the solar convection zone. Methods. A 3D rectangular local model is used for solving the full set of MHD equations in order to compute the electromotive force (emf), E = , generated by the interaction of imposed weak gradient-free magnetic fields and turbulent convection with varying rotational influence and latitude. By expanding the emf in terms of the mean magnetic field, E_i = a_ij , all nine components of a_ij are computed. The diagonal elements of a_ij describe the alpha-effect, whereas the off-diagonals represent magnetic pumping. The latter is essentially the advection of magnetic fields by means other than the underlying large-scale velocity field. Comparisons are made to analytical expressions of the coefficients derived under the first-order smoothing approximation (FOSA). Results. In the rapid rotation regime the latitudinal dependence of the alpha-components responsible for the generation of the azimuthal and radial fields does not exhibit a peak at the poles, as is the case for slow rotation, but at a latitude of about 30 degrees. The magnetic pumping is predominantly radially down- and latitudinally equatorward as in earlier studies. The numerical results compare surprisingly well with analytical expressions derived under first-order smoothing, although the present calculations are expected to lie near the limits of the validity range of FOSA.

P. J. Käpylä; M. J. Korpi; M. Ossendrijver; M. Stix

2006-05-10T23:59:59.000Z

439

Calculation of Nonlinear Thermoelectric Coefficients of InAs1xSbx Using Monte Carlo Method  

E-Print Network [OSTI]

and increase the cooling power density when a lightly doped thermoelectric material is under a large electrical with local nonequi- librium charge distribution. InAs1Ã?xSbx is a favorable thermoelectric materialCalculation of Nonlinear Thermoelectric Coefficients of InAs1Ã?xSbx Using Monte Carlo Method RAMIN

440

Dynamic polarizabilities of rare-earth-metal atoms and dispersion coefficients for their interaction with helium atoms  

E-Print Network [OSTI]

Dynamic polarizabilities of rare-earth-metal atoms and dispersion coefficients for their interaction with helium atoms Xi Chu Department of Chemistry, University of Montana, Missoula, Montana 59812; published 29 March 2007 The dynamic scalar and tensor polarizabilities of the rare-earth-metal atoms

Chu, Xi

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

Hall-Coefficient for Oriented Tl2ba2cacu2o8+delta Thin-Films  

E-Print Network [OSTI]

Measurements of the Hall coefficient and resistivity for highly oriented Tl2Ba2CaCu2O8+delta thin films are reported. The temperature dependence of cotTHETA(H), where THETA(H) is the normal-state Hall angle, for a single-phase (2:2:1:2) film sample...

WANG, PS; WILLIAMS, JC; RATHNAYAKA, KDD; HENNINGS, BD; Naugle, Donald G.; KAISER, AB.

1993-01-01T23:59:59.000Z

442

Abstract--The use of structured porous media is a proposed technique to achieve higher heat transfer coefficients by  

E-Print Network [OSTI]

transfer coefficients by increasing the specific surface area for heat transfer while aiming to maintain pressure drop for a given heat transfer performance. A comprehensive thermo-fluid model called MERLOT [1] was used to assess the use of porous heat transfer media for fusion plasma facing component applications

Pulsifer, John

443

Experimental Measurement of a Model Pipeline Dredge Entrance Loss Coefficient and Modification of a Spreadsheet for Estimating Model Dredge Performance  

E-Print Network [OSTI]

for Dredging Studies’ model cutter suction dredge. Testing was completed over the spectrum of specific gravities (SG) and flow rates achievable in the laboratory. The results show that the minor loss coefficient of the screen is a function of specific gravity...

Girani, Joseph

2014-04-17T23:59:59.000Z

444

Reply to the discussion by S. Chatterji of the paper "Effects of speciation on the apparent diffusion coefficient in nonreactive  

E-Print Network [OSTI]

diffusion coefficient in nonreactive porous systems" by K.A. Snyder Building and Fire Research Laboratory-Départment de Génie Civil Université Laval Sainte-Foy, Québec CANADA G1K 7P4 Reprinted from Cement and Concrete Institute of Standards and Technology and is not subject to copyright. #12;CEMENT AND CONCRETE RESEARCH

Bentz, Dale P.

445

Estimation of Nucleotide Diversity, Disequilibrium Coefficients, and Mutation Rates from High-Coverage Genome-Sequencing Projects  

E-Print Network [OSTI]

Estimation of Nucleotide Diversity, Disequilibrium Coefficients, and Mutation Rates from High for the binomial sampling of parental alleles at individual nucleotide sites and to eliminate bias from various the average nucleotide heterozygosity and its variance among sites, the pattern of decomposition of linkage

Lynch, Michael

446

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"

447

Discrimination Analysis of Earthquakes and Man-Made Events Using ARMA Coefficients Determination by Artificial Neural Networks  

SciTech Connect (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

448

Bias-dependent Peltier coefficient and internal cooling in bipolar devices K. P. Pipe and R. J. Ram  

E-Print Network [OSTI]

Bias-dependent Peltier coefficient and internal cooling in bipolar devices K. P. Pipe and R. J. Ram. In contrast to majority-carrier semiconductors in which a constant material-dependent Peltier coef- ficient is defined for a given temperature, bipolar devices can be modeled by introducing a bias-dependent Peltier

449

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...

Wilke, Anthony Gerald

1994-01-01T23:59:59.000Z

450

Lipschitz stability for a coefficient inverse problem for the non-stationary transport equation via Carleman estimate  

E-Print Network [OSTI]

, theory of nuclear reactors, etc. (see, e.g., the book of Anikonov, Kovtanyuk and Prokhorov [1], and [6 in a scattering medium, etc. (see, e.g., the book of Case and Zweifel [6]). Coefficient inverse problems (CIPs] and in the book of Romanov [23]. Uniqueness and existence results for CIPs for the non-stationary transport

451

Infrared Thermography applied to measurement of Heat transfer coefficient of water in a pipe heated by Joule effect  

E-Print Network [OSTI]

)" #12;1. Introduction Brazed aluminium heat exchangers are composed of flat tubes on the refrigerant exchangers with round tube, such as charge reduction and higher heat transfer coefficient. But, according are thus not suitable to small-channel heat exchangers. As a consequence, the refrigerant distribution

Boyer, Edmond

452

1438 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 19, NO. 3, AUGUST 2004 Scaling of Normal Form Analysis Coefficients  

E-Print Network [OSTI]

are illustrated on a 4­generator system. An ex- ample shows that the coefficients and indices not only detect non- linear interactions but also can become very large near a strong resonance in the system linearization equilibrium. The differential equations are then trans- formed so that the linearization is diagonalized

Dobson, Ian

453

Optical amplifier exhibiting net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation and method of operation  

DOE Patents [OSTI]

An optical amplifier, such as an optical waveguide amplifier (e.g., an optical fiber amplifier or a planar waveguide) or a non-guiding optical amplifier, that exhibits a net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation thereof is disclosed. In one aspect of the invention, an optical amplifier structure includes at least one optical amplifier having a length and a gain region. The at least one optical amplifier exhibits a net phase-mismatch that varies along at least part of the length thereof selected to at least partially reduce gain-induced phase-matching during operation thereof.

Feve, Jean-Philippe (Cupertino, CA); Kliner, Dahv A. V. (San Ramon, CA); Farrow; Roger L. (Pleasanton, CA)

2011-02-01T23:59:59.000Z

454

Avalanche buildup time of an InP/InGaAsP/InGaAs APD at high gain  

SciTech Connect (OSTI)

Under a high-gain operating condition, the presence of a multiplication process in the InGaAs(P) regions of an InP/InGaAsP/InGaAs avalanche photodiode having a structure of separated absorption and multiplication regions (SAM-APD) could lead to significant enhancement of the avalanche buildup time. As a result, the bandwidth of the device could be reduced considerably. The dependence of the avalanche multiplication factor and the intrinsic response time on the reverse bias voltage, the heterointerface field, the doping concentrations, and the width of the InP layer are examined in detail for the case in which hole injection is assumed. It is shown, for example, that for a fixed value of doping concentrations, the reduction of the excess noise factor and the enhancement of the gain-bandwidth product of the device can be made at the same time by a proper increase of the width of the InP layer.

Hsieh, H.C.; Sargeant, W. (Iowa State Univ. of Science and Technology, Ames, IA (USA). Dept. of Electrical Engineering)

1989-09-01T23:59:59.000Z

455

Design of Mixed-mode Adaptive Loop Gain Bang-Bang Clock and Data Recovery and Process-Variation-Resilient Current Mode Logic  

E-Print Network [OSTI]

) and Current Mode Logic (CML). This dissertation proposes a mixed-mode adaptive loop gain Bang-Bang CDR. The proposed CDR enhances jitter performances even if jitter spectrum information is limited a priori. By exploiting the inherent hard...

Jeon, Hyung-Joon

2013-03-19T23:59:59.000Z

456

Gain-assisted superluminal microwave pulse propagation via four-wave mixing in superconducting phase quantum circuits  

E-Print Network [OSTI]

We study the propagation and amplification of a microwave field in a four-level cascade quantum system which is realized in a superconducting phase quantum circuit. It is shown that by increasing the microwave pump tones feeding the system, the normal dispersion switches to the anomalous and the gain-assisted superluminal microwave propagation is obtained in this system. Moreover, it is demonstrated that the stimulated microwave field is generated via four-wave mixing without any inversion population in the energy levels of the system (amplification without inversion) and the group velocity of the generated pulse can be controlled by the external oscillating magnetic fluxes. We also show that in some special set of parameters, the absorption-free superluminal generated microwave propagation is obtained in superconducting phase quantum circuit system.

Z. Amini Sabegh; A. Vafafard; M. A. Maleki; M. Mahmoudi

2015-02-23T23:59:59.000Z

457

Gain-assisted superluminal microwave pulse propagation via four-wave mixing in superconducting phase quantum circuits  

E-Print Network [OSTI]

We study the propagation and amplification of a microwave field in a four-level cascade quantum system which is realized in a superconducting phase quantum circuit. It is shown that by increasing the microwave pump tones feeding the system, the normal dispersion switches to the anomalous and the gain-assisted superluminal microwave propagation is obtained in this system. Moreover, it is demonstrated that the stimulated microwave field is generated via four-wave mixing without any inversion population in the energy levels of the system (amplification without inversion) and the group velocity of the generated pulse can be controlled by the external oscillating magnetic fluxes. We also show that in some special set of parameters, the absorption-free superluminal generated microwave propagation is obtained in superconducting phase quantum circuit system.

Sabegh, Z Amini; Maleki, M A; Mahmoudi, M

2015-01-01T23:59:59.000Z

458

Determination of Mass Attenuation Coefficients for CuInSe2 and CuGaSe2 Semiconductors  

SciTech Connect (OSTI)

This work presents mass attenuation coefficients values of CuInSe2 and CuGaSe2 semiconductor thin films commonly used in photovoltaic devices. The mass attenuation coefficients were measured at different energies from 11.9 to 37.3 keV by using the secondary excitation method. Monochromatic photons were obtained using the Br, Sr, Mo, Cd, Te, Ba and Nd secondary targets. 59.5 keV gamma rays emitted from an annular Am-241 radioactive source were used to excite secondary targets. Characteristic X-rays emitted from secondary target were counted by a Si(Li) detector with a resolution of 0.16 keV at 5.9 keV. The measured values were compared with theoretical values calculated using WinXCOM program.

Celik, Ahmet; Cevik, Ugur; Baltas, Hasan; Bacaksiz, Emin [Department of Physics, Faculty of Arts and Sciences, Karadeniz Technical University, 61080 Trabzon (Turkey)

2007-04-23T23:59:59.000Z

459

Development of an improved MATLAB GUI for the prediction of coefficients of restitution, and integration into LMS.  

SciTech Connect (OSTI)

In 2012, a Matlab GUI for the prediction of the coefficient of restitution was developed in order to enable the formulation of more accurate Finite Element Analysis (FEA) models of components. This report details the development of a new Rebound Dynamics GUI, and how it differs from the previously developed program. The new GUI includes several new features, such as source and citation documentation for the material database, as well as a multiple materials impact modeler for use with LMS Virtual.Lab Motion (LMS VLM), and a rigid body dynamics modeling software. The Rebound Dynamics GUI has been designed to work with LMS VLM to enable straightforward incorporation of velocity-dependent coefficients of restitution in rigid body dynamics simulations.

Baca, Renee Nicole; Congdon, Michael L.; Brake, Matthew Robert

2014-07-01T23:59:59.000Z

460

Fabrication of Message Digest to Authenticate Audio Signals with Alternation of Coefficients of Harmonics in Multi-Stages (MDAC)  

E-Print Network [OSTI]

Providing security to audio songs for maintaining its intellectual property right (IPR) is one of chanllenging fields in commercial world especially in creative industry. In this paper, an effective approach has been incorporated to fabricate authentication of audio song through application of message digest method with alternation of coefficients of harmonics in multi-stages of higher frequency domain without affecting its audible quality. Decomposing constituent frequency components of song signal using Fourier transform with generating secret code via applying message digest followed by alternating coefficients of specific harmonics in multi-stages generates a secret code and this unique code is utilized to detect the originality of the song. A comparative study has been made with similar existing techniques and experimental results are also supported with mathematical formula based on Microsoft WAVE (".wav") stereo sound file.

Mondal, Uttam Kr

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.


461

Experimental and numerical investigation of the reflection coefficient and the distributions of Wigner's reaction matrix for irregular graphs with absorption  

E-Print Network [OSTI]

We present the results of experimental and numerical study of the distribution of the reflection coefficient P(R) and the distributions of the imaginary P(v) and the real P(u) parts of the Wigner's reaction K matrix for irregular fully connected hexagon networks (graphs) in the presence of strong absorption. In the experiment we used microwave networks, which were built of coaxial cables and attenuators connected by joints. In the numerical calculations experimental networks were described by quantum fully connected hexagon graphs. The presence of absorption introduced by attenuators was modelled by optical potentials. The distribution of the reflection coefficient P(R) and the distributions of the reaction K matrix were obtained from the measurements and numerical calculations of the scattering matrix S of the networks and graphs, respectively. We show that the experimental and numerical results are in good agreement with the exact analytic ones obtained within the framework of random matrix theory (RMT).

Michal Lawniczak; Oleh Hul; Szymon Bauch; Petr Seba; Leszek Sirko

2009-03-18T23:59:59.000Z

462

The potential environmental gains from recycling waste plastics: Simulation of transferring recycling and recovery technologies to Shenyang, China  

SciTech Connect (OSTI)

Research highlights: {yields} Urban symbiosis creates compatibility of industrial development and waste management. {yields} Mechanical technology leads to more CO{sub 2} emission reduction. {yields} Energy recovery technology leads to more fossil fuel saving. {yields} Clean energy makes recycling technologies cleaner. {yields} Demand management is crucial for realizing potential environmental gains of recycling. - Abstract: With the increasing attention on developing a low-carbon economy, it is necessary to seek appropriate ways on reducing greenhouse gas (GHG) emissions through innovative municipal solid waste management (MSWM), such as urban symbiosis. However, quantitative assessments on the environmental benefits of urban symbiosis, especially in developing countries, are limited because only a limited number of planned synergistic activities have been successful and it is difficult to acquire detailed inventory data from private companies. This paper modifies and applies a two-step simulation system and used it to assess the potential environmental benefits, including the reduction of GHG emissions and saving of fossil fuels, by employing various Japanese plastics recycling/energy-recovery technologies in Shenyang, China. The results showed that among various recycling/energy-recovery technologies, the mechanical waste plastics recycling technology, which produces concrete formwork boards (NF boards), has the greatest potential in terms of reducing GHG emissions (1.66 kg CO{sub 2}e/kg plastics), whereas the technology for the production of refuse plastic fuel (RPF) has the greatest potential on saving fossil fuel consumption (0.77 kgce/kg-plastics). Additional benefits can be gained by applying combined technologies that cascade the utilization of waste plastics. Moreover, the development of clean energy in conjunction with the promotion of new waste plastics recycling programs could contribute to additional reductions in GHG emissions and fossil fuel consumption.

Chen Xudong, E-mail: chen.xudong@nies.go.jp [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan); Xi Fengming [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Geng Yong, E-mail: gengyong@iae.ac.cn [Institute of Applied Ecology, Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016 (China); Fujita, Tsuyoshi [National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506 (Japan); Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya City 464-8601 (Japan)

2011-01-15T23:59:59.000Z

463

Diffusion Coefficient of Tritium Through Molten Salt Flibe and Rate of Tritium Leak from Fusion Reactor System  

SciTech Connect (OSTI)

Diffusion coefficients of hydrogen isotopes in Flibe were correlated with making reference to previous relating data of F{sup -} ion self-diffusivity and Flibe viscosity and so on. Rates of tritium permeation through structural materials in a fusion reactor system with Flibe blanket were estimated comparatively under conditions with or without a Flibe permeation barrier. A way to lower the tritium leak rate below a level regulated by law was proposed, and its effectiveness was discussed.

Fukada, Satoshi [Kyushu University (Japan); Anderl, Robert A. [Idaho National Engineering and Environmental Laboratory (United States); Sagara, Akio [National Institute for Fusion Science (Japan); Nishikawa, Masabumi [Kyushu University (Japan)

2005-07-15T23:59:59.000Z

464

Determination of interaction second virial coefficients for the CO?-H?O system using gas-liquid chromatography  

E-Print Network [OSTI]

-stage brass regulator, INJECTOR B DETECTOR B ACCESSORY LOO P ~GAS SAMPL ING u VALV E SAMPLE INJECT INJECTO COLUMN~ FLOW CONTROLLER INLET PRESSURE GAUGE DETECTOR A ON-OFF Q VA LVE CAR RIER GAS SOURCE OUT LET PRESSURE GAUG E COLLECTOR...DETERMINATION OF INTERACTION SECOND VIRIAL COEFFICIENTS FOR THE CO~ ? H20 SYSTEM USING GAS ? LIQUID CHROMATOGRAPHY A Thesis by KEITH NOLAN ROGERS Submitted to the Graduate College of Texas A&M University in partial fulfillment...

Rogers, Keith Nolan

1979-01-01T23:59:59.000Z

465

Interrater Agreement and Reliability of Observed Behaviors: Comparing Percentage Agreement, Kappa, Correlation Coefficient, ICC and G Theory  

E-Print Network [OSTI]

INTERRATER AGREEMENT AND RELIABILITY OF OBSERVED BEHAVIORS: COMPARING PERCENTAGE AGREEMENT, KAPPA, CORRELATION COEFFICIENT, ICC AND G THEORY A Thesis by QIAN CAO Submitted to the Office of Graduate Studies of Texas A&M University... 2013 Major Subject: Educational Psychology Copyright 2013 Qian Cao ii ABSTRACT The study of interrater agreement and itnerrater reliability attract extensive attention, due to the fact that the judgments from multiple raters...

Cao, Qian

2013-04-28T23:59:59.000Z

466

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

467

Characterization of the fluorescence correlation spectroscopy (FCS) standard Rhodamine 6G and calibration of its diffusion coefficient in aqueous solutions  

SciTech Connect (OSTI)

Precise diffusion measurements of rhodamine 6G (Rh6G) dissolved in D{sub 2}O at concentrations between 50 and 200 ?M were carried out in the temperature range from 280 to 320 K using pulsed field gradient nuclear magnetic resonance (PFG-NMR). The obtained diffusion coefficients can be used as a calibration reference in fluorescence correlation spectroscopy (FCS). Besides measuring the diffusivity of Rh6G, the diffusion coefficient of the solvent in the same system could be determined in parallel by PFG-NMR as the resonances of water and Rh6G are well separated in the {sup 1}H NMR spectrum. To analyze the differences due to the isotope effect of the solvent (D{sub 2}O vs. H{sub 2}O), the correlation time ?{sub D} of Rh6G was measured by FCS in both D{sub 2}O and H{sub 2}O. The obtained isotopic correction factor, ?{sub D}(D{sub 2}O)/?{sub D}(H{sub 2}O) = 1.24, reflects the isotope effect of the solvent´s self-diffusion coefficients as determined previously by PFG-NMR.

Majer, G., E-mail: majer@is.mpg.de [Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569 Stuttgart (Germany); Melchior, J. P. [Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart (Germany)] [Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart (Germany)

2014-03-07T23:59:59.000Z

468

Efficiency and accuracy of the perturbation response coefficient generation method for whole core comet calculations in BWR and CANDU configurations  

SciTech Connect (OSTI)

The coarse mesh transport method (COMET) is a highly accurate and efficient computational tool which predicts whole-core neutronics behaviors for heterogeneous reactor cores via a pre-computed eigenvalue-dependent response coefficient (function) library. Recently, a high order perturbation method was developed to significantly improve the efficiency of the library generation method. In that work, the method's accuracy and efficiency was tested in a small PWR benchmark problem. This paper extends the application of the perturbation method to include problems typical of the other water reactor cores such as BWR and CANDU bundles. It is found that the response coefficients predicted by the perturbation method for typical BWR bundles agree very well with those directly computed by the Monte Carlo method. The average and maximum relative errors in the surface-to-surface response coefficients are 0.02%-0.05% and 0.06%-0.25%, respectively. For CANDU bundles, the corresponding quantities are 0.01%-0.05% and 0.04% -0.15%. It is concluded that the perturbation method is highly accurate and efficient with a wide range of applicability. (authors)

Zhang, D.; Rahnema, F. [Georgia Institute of Technology, 770 State Street NW, Atlanta, GA 30332-0745 (United States)

2013-07-01T23:59:59.000Z

469

Influence of plasma parameters on the absorption coefficient of alpha particles to lower hybrid waves in tokamaks  

SciTech Connect (OSTI)

In tokamaks, fusion generated ? particles may absorb lower hybrid (LH) wave energy, thus reducing the LH current drive efficiency. The absorption coefficient ?{sub ?} of LH waves due to ? particles changing with some typical parameters is calculated in this paper. Results show that ?{sub ?} increases with the parallel refraction index n{sub ?}, while decreases with the frequency of LH waves ? over a wide range. Higher background plasma temperature and toroidal magnetic field will increase the absorption. The absorption coefficient ?{sub ?} increases with n{sub e} when n{sub e} ? 8 × 10{sup 19} m{sup ?3}, while decreases with n{sub e} when n{sub e} becomes larger, and there is a peak value of ?{sub ?} when n{sub e} ? 8 × 10{sup 19} m{sup ?1} for the ITER-like scenario. The influence of spectral broadening in parametric decay instabilities on the absorption coefficient is evaluated. The value of ?{sub ?} with n{sub ?} being 2.5 is almost two times larger than that with n{sub ?} being 2.0 and is even lager in the case of 2.9, which will obviously increase the absorption of the LH power by alpha particles.

Wang, J.; Zhang, X., E-mail: zhangxm@ecust.edu.cn; Yu, L.; Zhao, X. [East China University of Science and Technology, Department of Physics (China)

2014-12-15T23:59:59.000Z

470

Seasonal variability in the vertical attenuation coefficient at 490 nm (K490) in waters around Puerto Rico and US Virgin Islands.  

E-Print Network [OSTI]

ecosystems. KEYWORDS: Water Diffuse Attenuation Coefficient, Kd, Remote Sensing, Ocean Color, Puerto Rico, US this affected sediment resuspension, intense water column mixing, and increased delivery of terrestrialSeasonal variability in the vertical attenuation coefficient at 490 nm (K490) in waters around

Gilbes, Fernando

471

Export markets gain strength  

SciTech Connect (OSTI)

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

472

Gaining Experience Experiential Learning  

E-Print Network [OSTI]

Impact Analyst Ecologist Environmental Affairs Manager Environmental Educator Environmental Engineer://jobs.environmentamerica.org/page/ amr/internships-make-difference Environmental Career Opportunities http://www.ecojobs.com/environmental- internships.htm Florida Dept. of Environmental Protection http://www.dep.state.fl.us/careers/ careers

Wu, Shin-Tson

473

Gaining Experience Experiential Learning  

E-Print Network [OSTI]

Raiser Grass Roots Coordinator Environmental Lawyer Environmental Impact Analyst Ecologist Environmental http://www.cdc.gov/nceh/ehs/Resources/ internship.htm Florida Environmental Internships http://www.fiu.edu/~envstud/ internships.htm Environmental Career Opportunities http://www.ecojobs.com/environmental- internships

Van Stryland, Eric

474

Gain Sharing.PDF  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject: Guidance for natural gas asWindEECBGSE DOE/IG-480 I N S

475

Gains from Synchronization  

E-Print Network [OSTI]

show that the exporter country bene#12;ts, through decreased noise and uctuations, from devaluating its currency, whereas the importer country does not bene#12;t, in terms of noise and uctuations, from increased valuation of their currency... steady state value. Depending on the value of ( ; #11;), the process has the ability to generate a variety of time paths, including perpetual oscillations. Another \\base model" of an AR(2) process of output is Romer (2001, pages 174-186), which does...

Barnett, William A.; Dalkir, Mehmet

2005-03-30T23:59:59.000Z

476

Small-signal modulation and differential gain of red-emitting (??=?630?nm) InGaN/GaN quantum dot lasers  

SciTech Connect (OSTI)

We report small-signal modulation bandwidth and differential gain measurements of a ridge waveguide In{sub 0.4}Ga{sub 0.6}N/GaN quantum dot laser grown by molecular beam epitaxy. The laser peak emission is at ??=?630?nm. The ?3?dB bandwidth of an 800??m long device was measured to be 2.4?GHz at 250?mA under pulsed biasing, demonstrating the possibility of high-speed operation of these devices. The differential gain was measured to be 5.3?×?10{sup ?17}?cm{sup 2}, and a gain compression factor of 2.87?×?10{sup ?17}?cm{sup 3} is also derived from the small-signal modulation response.

Frost, Thomas; Banerjee, Animesh; Bhattacharya, Pallab, E-mail: pkb@eecs.umich.edu [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States)] [Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122 (United States)

2013-11-18T23:59:59.000Z

477

Sorption coefficients for radionuclides on samples from the water-bearing Magenta and Culebra members of the Rustler Formation  

SciTech Connect (OSTI)

The sorbing characteristics of samples from the Magenta and Culebra dolomites of the Rustler Formation (which overlie the proposed site for the Waste Isolation Pilot Plant (WIPP) in southeastern New Mexico) for various radionuclides have been studied. Core samples extracted from various depths and boreholes within a given formation were selected to provide a cross section of materials which are present in the formations. They varied in composition from pure dolomite to nearly pure anhydrite. The radionuclides used in the sorption coefficient measurements (isotopes of Cs, Sr, Tc, Eu, Am and Pu) were dissolved in a simulated Culebra groundwater at concentrations of 0.1 ..mu..Ci/m1 or less. The results indicate that the sorption coefficients (Kd's) of these water-bearing units may vary widely depending on the borehole area and over several feet in depth in a common borehole. Cesium Kd values from 0.6 to 218 ml/g and 1.2 to 68 on Magenta and Culebra samples, respectively. Strontium Kd values ranged from 1.1 to 30 on Magenta Samples and from 0.6 to 32 on Culebra samples. Variations of Eu, Pu and Am Kd's were generally less than an order of magnitude on both Culebra and Magenta samples. Technetium was not sorbed by any of the samples. With few exceptions, samples with high dolomite contents had higher sorption coefficients than those with high anhydrite concentrations. Clay content may also be a factor for some radionuclides, particularly Cs, which has been shown to sorb preferentially on clay particles in Magenta.

Lynch, A. W.; Dosch, R. G.

1980-11-01T23:59:59.000Z

478

MHD simulations of the magnetorotational instability in a shearing box with zero net flux. II. The effect of transport coefficients  

E-Print Network [OSTI]

We study the influence of the choice of transport coefficients (viscosity and resistivity) on MHD turbulence driven by the magnetorotational instability (MRI) in accretion disks. We follow the methodology described in paper I: we adopt an unstratified shearing box model and focus on the case where the net vertical magnetic flux threading the box vanishes. For the most part we use the finite difference code ZEUS, including explicit transport coefficients in the calculations. However, we also compare our results with those obtained using other algorithms (NIRVANA, the PENCIL code and a spectral code) to demonstrate both the convergence of our results and their independence of the numerical scheme. We find that small scale dissipation affects the saturated state of MHD turbulence. In agreement with recent similar numerical simulations done in the presence of a net vertical magnetic flux, we find that turbulent activity (measured by the rate of angular momentum transport) is an increasing function of the magnetic Prandtl number Pm for all values of the Reynolds number Re that we investigated. We also found that turbulence disappears when the Prandtl number falls below a critical value Pm_c that is apparently a decreasing function of Re. For the limited region of parameter space that can be probed with current computational resources, we always obtained Pm_c>1. We conclude that the magnitudes of the transport coefficients are important in determining the properties of MHD turbulence in numerical simulations in the shearing box with zero net flux, at least for Reynolds numbers and magnetic Prandtl numbers that are such that transport is not dominated by numerical effects and thus can be probed using current computational resources.

S. Fromang; J. Papaloizou; G. Lesur; T. Heinemann

2007-10-04T23:59:59.000Z

479

The contact heat conductance at diamond-OFHC copper interface with GaIn eutectic as a heat transfer medium  

SciTech Connect (OSTI)

Results of an experimental study of the contact heat conductance across a single diamond crystal interface with OFHC copper (Cu) are reported. Gallium-indium (GaIn) eutectic was used as an interstitial material. Contact conductance data are important in the design and the prediction of the performance of x-ray diamond monochromators under high-heat-load conditions. Two sets of experiments were carried out. In one, the copper surface in contact with diamond was polished and then electroless plated with 1 {mu}m of nickel, while in the other, the copper contact surface was left as machined. Measured average interface heat conductances are 44.7 {plus_minus}8 W/cm{sup 2}{minus}K for nonplated copper and 23.0 {plus_minus}3 W/cm{sup 2}{minus}K for nickel-plated copper. For reference, the thermal contact conductances at a copper-copper interface (without diamond) were also measured, and the results are reported. A typical diamond monochromator, 0.2 mm thick, will absorb about 44 W under a standard undulator beam at the Advanced Photon Source. The measured conductance for nickel-plated copper suggests that the temperature drop across the interface of diamond and nickel-plated copper, with a 20 mm{sup 2} contact area, will be about 10{degree}C. Therefore temperature rises are rather modest, and the accuracy of the measured contact conductances presented here are sufficient for design purposes.

Assoufid, L.; Khounsary, A.M.

1996-01-01T23:59:59.000Z

480

Contact heat conductance at a diamond-OFHC copper interface with GaIn eutectic as a heat transfer medium  

SciTech Connect (OSTI)

The results of an experimental study of the contact heat conductance across a single diamond crystal interface with OFHC copper (Cu) are reported. Gallium-indium (GaIn) eutectic was used as an interstitial material. Contact conductance data are important in the design and the prediction of the performance of x-ray optics under high-heat-load conditions. Two sets of experiments were carried out. In one, the copper surface in contact with diamond was polished and then electroless plated with 1 {mu}m of nickel, while in the other, the copper contact surface was left as machined. The measured average interface heat conductances are 44.7{plus_minus}8 W/cm{sup 2}-K for nonplated copper and 23.0{plus_minus}8 W/cm{sup 2}-K for nickel-plated copper. For reference, the thermal contact conductances at a copper-copper interface (without diamond) were also measured, and the results are reported. A typical diamond monochromator, 0.2 mm thick, will absorb about 44 W under a standard undulator beam at the Advanced Photon Source. The measured conductance for nickel-plated copper suggests that the temperature drop across the interface of diamond and nickel-plated copper, with a 20 mm {sup 2}contact area, will be about 10{degree}C. Therefore temperature rises are rather modest, and the accuracy of the measured contact conductances presented here are sufficient for design purposes. {copyright} {ital 1996 American Institute of Physics.}

Assoufid, L.; Khounsary, A. [Experimental Facilities Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)] [Experimental Facilities Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

1996-09-01T23:59:59.000Z

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.


481

Critical coupling and coherent perfect absorption for ranges of energies due to a complex gain and loss symmetric system  

SciTech Connect (OSTI)

We consider a non-Hermitian medium with a gain and loss symmetric, exponentially damped potential distribution to demonstrate different scattering features analytically. The condition for critical coupling (CC) for unidirectional wave and coherent perfect absorption (CPA) for bidirectional waves are obtained analytically for this system. The energy points at which total absorption occurs are shown to be the spectral singular points for the time reversed system. The possible energies at which CC occurs for left and right incidence are different. We further obtain periodic intervals with increasing periodicity of energy for CC and CPA to occur in this system. -- Highlights: •Energy ranges for CC and CPA are obtained explicitly for complex WS potential. •Analytical conditions for CC and CPA for PT symmetric WS potential are obtained. •Conditions for left and right CC are shown to be different. •Conditions for CC and CPA are shown to be that of SS for the time reversed system. •Our model shows the great flexibility of frequencies for CC and CPA.

Hasan, Mohammad, E-mail: mohammadhasan786@gmail.com [ISRO Satellite Centre (ISAC), Bangalore-560017 (India); Ghatak, Ananya, E-mail: gananya04@gmail.com [Department of Physics, Banaras Hindu University, Varanasi-221005 (India); Mandal, Bhabani Prasad, E-mail: bhabani.mandal@gmail.com [Department of Physics, Banaras Hindu University, Varanasi-221005 (India)

2014-05-15T23:59:59.000Z

482

Gain analysis of higher-order-mode amplification in a dielectric-implanted multi-beam traveling wave structure  

SciTech Connect (OSTI)

A multi-beam traveling wave amplifier designed with an overmoded staggered double grating array was examined by small signal analysis combined with simulation. Eigenmode and S-parameter analyses show that the 2 cm long slow wave structure (SWS) has 1–5 dB insertion loss over the passband (TM{sub 31} mode) with ?28% cold bandwidth. Analytic gain calculation indicates that in the SWS, TM{sub 31}-mode is amplified with 15–20 dB/beam at 64–84 GHz with three elliptical beams of 10 kV and 150 mA/beam, which was compared with particle-in-cell (PIC) simulations. PIC analysis on the analysis of instability with zero-input driving excitations demonstrated that background noises and non-operating lower order modes are noticeably suppressed by implanting equidistant dielectric absorbers; the overmoded structure only allowed the desired 3rd order mode to propagate in the structure. The designed circuit structure can be widely applied to multi-beam devices for high power RF generation.

Gee, Anthony [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States)] [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States); Shin, Young-Min [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States) [Department of Physics, Northern Illinois University, Dekalb, Illinois 60115 (United States); Accelerator Physics Center (APC), Fermi National Accelerator Laboratory (FNAL), Batavia, Illinois 60510 (United States)

2013-07-15T23:59:59.000Z

483

Electrical, thermal, and species transport properties of liquid eutectic Ga-In and Ga-In-Sn from first principles  

SciTech Connect (OSTI)

Using ab initio molecular dynamics, the atomic structure and transport properties of eutectic Ga-In and Ga-In-Sn are investigated. The Kubo-Greenwood (K-G) and the Ziman-Faber (Z-F) formulations and the Wiedemann-Franz (W-F) law are used for the electrical and electronic thermal conductivity. The species diffusivity and the viscosity are also predicted using the mean square displacement and the Stokes-Einstein (S-E) relation. Alloying Ga causes more disordered structure, i.e., broadening the atomic distance near the In and Sn atoms, which reduces the transport properties and the melting temperature. The K-G treatment shows excellent agreement with the experimental results while Z-F treatment formula slightly overestimates the electrical conductivity. The predicted thermal conductivity also shows good agreement with the experiments. The species diffusivity and the viscosity are slightly reduced by the alloying of Ga with In and Sn atoms. Good agreements are found with available experimental results and new predicted transport-property results are provided.

Yu, Seungho; Kaviany, Massoud, E-mail: kaviany@umich.edu [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2014-02-14T23:59:59.000Z

484

Health and productivity gains from better indoor environments and their implications for the U.S. Department of Energy  

SciTech Connect (OSTI)

A substantial portion of the US population suffers frequently from communicable respiratory illnesses, allergy and asthma symptoms, and sick building syndrome symptoms. We now have increasingly strong evidence that changes in building design, operation, and maintenance can significantly reduce these illnesses. Decreasing the prevalence or severity of these health effects would lead to lower health care costs, reduced sick leave, and shorter periods of illness-impaired work performance, resulting in annual economic benefits for the US in the tens of billions of dollars. Increasing the awareness of these potential health and economic gains, combined with other factors, could help bring about a shift in the way we design, construct, operate, and occupy buildings. The current goal of providing marginally adequate indoor environments could be replaced by the goal of providing indoor environments that maximize the health, satisfaction, and performance of building occupants. Through research and technology transfer, DOE and its contractors are well positioned to help stimulate this shift in practice and, consequently, improve the health and economic well-being of the US population. Additionally, DOE's energy-efficiency interests would be best served by a program that prepares for the potential shift, specifically by identifying and promoting the most energy-efficient methods of improving the indoor environment. The associated research and technology transfer topics of particular relevance to DOE are identified and discussed.

Fisk, William J.

2000-10-01T23:59:59.000Z

485

Superfluid Mutual-friction Coefficients from Vortex Dynamics in the Two-dimensional Galerkin-truncated Gross-Pitaevskii Equation  

E-Print Network [OSTI]

We present algorithms for the ab-initio determination of the temperature ($T$) dependence of the mutual-friction coefficients $\\alpha$ and $\\alpha'$ and the normal-fluid density $\\rho_{\\rm n}$ in the two-dimensional (2D) Galerkin-truncated Gross-Pitaevskii system. Our algorithms enable us to determine $\\alpha(T)$, even though fluctuations in 2D are considerably larger than they are in 3D. We also examine the implications of our measurements of $\\alpha'(T)$ for the Iordanskii force, whose existence is often questioned.

Vishwanath Shukla; Marc Brachet; Rahul Pandit

2014-11-23T23:59:59.000Z

486

Measurement of the H-1(d-],N-])Pp Transverse Polarization Transfer-Coefficient at 42.8 Mev  

E-Print Network [OSTI]

PHYSICAL REVIEW C VOLUME 28, NUMBER 6 DECEMBER 1983 Measurement of the 'H( d, n )pp transverse polarization transfer coefficient at 42.8 Mev Subrata Nath, R. G. Graves, * J. C. Hiebert, L. C. Northcliffe, H. L. Woolverton, t and R. L. York... to the neutron (E?=35.0 MeV); (2) the proton colinearity condition (p-col) in which one of the protons is at rest in the c.m. system (E?=30.7 MeV); (3) the symmetric, constant-relative-energy (SCRE) configuration character- ized by equal relative energies...

Nath, S.; Graves, R. G.; Hiebert, John C.; Northcliffe, L. C.; Woolverton, H. L.; York, R. L.; Brown, R. E.; Doleschall, P.

1983-01-01T23:59:59.000Z

487

Sign Change of Hall-Coefficients for Amorphous Ni0.80-Xcrxp0.20 Alloys  

E-Print Network [OSTI]

.20 ?3.80 ?4.07 ?2.8S 7.0 7.2 47 2.1 2.2 1.4 2.6 4.3 6.2 0.3 0.6 1.0 400 665 1024 SIGN CHANGE OF HALL COEFFICIENTS FOR AMORPHOUS. . . 2- 0- -2- -4 0.0 I 0.1 I 0.2 I 0.3 I 0.4 0.5 FICx. '7. RH vs x for Nio Sp Cr Pozo alloys...

RHIE, K.; Naugle, Donald G.; O, BH; MARKERT, JT.

1994-01-01T23:59:59.000Z

488

Gain uniformity of InP/InGaAsP/InGaAs avalanche photodiodes with separate absorption, grading, and multiplication regions  

SciTech Connect (OSTI)

We report on the spatial uniformity of the gain M of InP/ InGaAsP/InGaAs avalanche photodiodes with separate absorption, grading, and multiplication regions (SAGM-APD's). Typically, these APD's exhibit less than 10 percent variation in the gain (for M less than or equal to 10) over the entire photosensitive area. The small nonuniformity which is observed shows a one-to-one correspondence with inhomogeneities in the epitaxial layers of the SAGM-APD structure. We also observe a reduction in the effective photosensitive diameter with increasing bias voltage.

Holden, W.S.; Campbell, J.C.; Dental, A.G.

1985-09-01T23:59:59.000Z

489

Simulation study on error propagation effects when determining second virial coefficients from the speed-of-sound or the Joule-Thomson experiment  

E-Print Network [OSTI]

SIMULATION STUDY ON ERROR PROPAGATION EFFECTS WHEN DETERMINING SECOND VIRIAL COEFFICIENTS FROM THE SPEED-OF-SOUND OR THE JOULE-THOMSON EXPERIMENT A Thesis by DAVID J. VAN PEURSEM Submitted to the Office of Graduate Studies of Texas A&M...-hexane 0 a a Al-Bizreh a Wormald [10] ~ Dymond & Smith [9l 280 300 320 340 360 380 400 420 440 460 T (K) Thomson coefficient data are propagated into the second virial coefficients derived from these experiments. This will be done by performing a...

Van Peursem, David J.

1991-01-01T23:59:59.000Z

490

Static characteristics and rotordynamic coefficients of a four-pad tilting-pad journal bearing with ball-in-socket pivots in load-between-pad configuration  

E-Print Network [OSTI]

Static characteristics and rotordynamic coefficients were experimentally determined for a four-pad tilting-pad journal bearing with ball-in-socket pivots in loadbetween- pad configuration. A frequency-independent [M]-[C]-[K] model fit...

Harris, Joel Mark

2009-05-15T23:59:59.000Z

491

Study of Impact of Orbit Path, Whirl Ratio and Clearance on the Flow Field and Rotordynamic Coefficients for a Smooth Annular Seal  

E-Print Network [OSTI]

The study of the effect of different orbit paths and whirl ratios on the rotordynamic coefficients of a smooth eccentric annular seal, using Computational Fluid Dynamics (CFD) was performed. The flow was simulated for two different orbits - linear...

Sekaran, Aarthi

2010-10-12T23:59:59.000Z

492

Rate coefficients for the endothermic reactions C+(^2P)+H2(D2)?CH^+(CD^+)+H(D) as functions of temperature from 400–1300 K  

E-Print Network [OSTI]

We have measured the bimolecular rate coefficients for the reactions of C+(2P) with H2 and D2 as functions of temperature from 400 to 1300 K using a high temperatureflowing afterglow apparatus. The temperature dependences ...

Hierl, Peter M.; Morris, Robert A.; Viggiano, A. A.

1997-03-20T23:59:59.000Z

493

Quantum Rate Coefficients and Kinetic Isotope Effect for the Reaction Cl + CH[subscript 4] ? HCl + CH[subscript 3] from Ring Polymer Molecular Dynamics  

E-Print Network [OSTI]

Thermal rate coefficients and kinetic isotope effect have been calculated for prototypical heavy–light–heavy polyatomic bimolecular reactions Cl + CH[subscript 4]/CD[subscript 4] ? HCl/DCl + CH[subscript 3]/CD[subscript ...

Li, Yongle

494

Experimental frequency-dependent rotordynamic coefficients for a load-on-pad, high-speed, flexible-pivot tilting-pad bearing  

E-Print Network [OSTI]

This thesis provides experimental frequency dependent stiffness and damping coefficient results for a high-speed, lightly loaded, flexible-pivot tilting-pad bearing, with a load-on-pad configuration. Test conditions include four shaft speeds (6000...

Rodriguez Colmenares, Luis Emigdio

2004-09-30T23:59:59.000Z

495

Field dependences of magnetization and specific-heat coefficient in a nearly magnetic system: Liquid /sup 3/He and strong Pauli paramagnets  

SciTech Connect (OSTI)

We analytically derive the first-order magnetic-field dependences of the magnetization M and of the coefficient ..gamma.. of the specific heat, in a nearly magnetic paramagnet, at low temperature.

Beal-Monod, M.T.; Daniel, E.

1983-04-01T23:59:59.000Z

496

A 220GHz InP HBT Solid-State Power Amplifier MMIC with at 8.2dB Compressed Gain  

E-Print Network [OSTI]

A 220GHz InP HBT Solid-State Power Amplifier MMIC with 90mW POUT at 8.2dB Compressed Gain Thomas B, CA, USA 91360 zgriffith@teledyne-si.com Abstract -- A 220 GHz Solid State Power Amplifer MMIC, Solid State Power Amplifier (SSPA). I. INTRODUCTION Future synthetic aperture radars and high resolution

Rodwell, Mark J. W.

497

54 IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY, VOL. 1, NO. 2, FEBRUARY 2013 Multi-Gain-Stage InGaAs Avalanche Photodiode  

E-Print Network [OSTI]

GaAs Avalanche Photodiode with Enhanced Gain and Reduced Excess Noise George M. Williams, Madison Compton, David, and test of an InGaAs avalanche photodiode (APD) for 950­1650 nm wave- length sensing applications. The APD over 1 000. Index Terms--Avalanche photodiode, optical receiver, photo detector, photon counting. I

Hayat, Majeed M.

498

Daily Gazette, Schenectady NY Letters to the Editor for Thursday, July 10, 2008 Nothing to fear, and much to gain, from waste-to-energy  

E-Print Network [OSTI]

, and much to gain, from waste-to-energy Schenectady is one of those misguided cities that sends its municipal solid wastes to distant landfills, costing much money, wasting valuable energy and increasing global warming and pollution of our environment. Waste-to-energy (WTE) is safe. I advised the Israel

Columbia University

499

SWOT analyses were performed on four different campus bike centers to gain an understanding of the most common features of a  

E-Print Network [OSTI]

; #12; #12;#12; #12; SWOT analyses were performed on four different campus bike centers to gain an understanding of the most common features of a successful bike center. #12;#12;#12;#12; #12; #12 their biking knowledge and skills, but their entire lifestyles #12; Design the space

Brownstone, Rob

500

Demonstration of an 8.85 nm Gain-Saturated Table-Top Soft X-Ray Laser and Lasing down to 7.4 nm  

SciTech Connect (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