Sample records for approximately one-half hour

  1. NERSC Franklin Hours Used Report

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

    Franklin Hours Used Franklin Hours Used 2011 Franklin Usage in Hours 2011 Franklin Usage in Hours 2010 2010 Franklin Usage in Hours 2009 2009 Franklin Usage in Hours 2007-2008 2008...

  2. LIBRARY SERVICES LIBRARY HOURS

    E-Print Network [OSTI]

    Royer, Dana

    LIBRARY SERVICES LIBRARY HOURS Up-to-date library hours are posted at http Wesleyan ID that is linked to the library circulation database is needed to charge out library materials to visit the Circulation Office in Olin Library 115 to set up their borrowing privileges. If you have

  3. L:\\SEO\\SEOGN\\WORK-STUDY\\SWS\\SWS11\\EarningsChart.xls Hourly Rate 10 Hours 15 Hours 20 Hours 25 Hours 30 Hours

    E-Print Network [OSTI]

    Guenther, Frank

    L:\\SEO\\SEOGN\\WORK-STUDY\\SWS\\SWS11\\EarningsChart.xls Hourly Rate 10 Hours 15 Hours 20 Hours 25 Hours, 2011 through September 4, 2011, the entire Summer Program). Summer 2011 Earnings Chart #12;L:\\SEO,200 $9,000 $10,800 $25.00 $3,750 $5,625 $7,500 $9,375 $11,250 #12;L:\\SEO\\SEOGN\\WORK-STUDY\\SWS\\SWS11

  4. NERSC Carver Hours Used Report

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

    Carver Hours Used Carver Hours Used Hopper Usage Chart Hopper Usage Chart Date Hours Used (in millions) Percent of Maximum Possible (24 hoursday) 12152014 161.25 84.75 1214...

  5. Intra-Hour Scheduling

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes | National NuclearInterlibrary LoanSafeguardsInternshipsintra-hour

  6. Start Date: Hours per Week

    E-Print Network [OSTI]

    Garfunkel, Eric

    Wednesday Thursday Friday Saturday Sunday Storming Robots Technology Learning Institution 3322 Rt. 22 West, Suite 402 Branchburg NJ 08876 Elizabeth Mabrey emabrey@stormingrobots.com 908-595-1010 Robotics Instructor / Assistant $15 to $30 Any Time from 2 to 12 hours per week one 1) Instructor/Assistant

  7. One Half or 50%? An Eye-Tracking Study of

    E-Print Network [OSTI]

    of rounding. Our experiments were performed by 72 persons, half of them with dyslexia. To the best of our language, even more for people with dyslexia. Key words: textual accessibility, dyslexia, user testing, eye, and people with limited education or some kind of social or cognitive disability, such as dyslexia. Numerical

  8. NERSC Carver Hours Used Report

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your1Allocations NERSC Allocations:Carver Hours Used Carver

  9. NERSC Franklin Hours Used Report

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your1AllocationsNOVA Portal: Submit2014 NERSCFranklin Hours

  10. Stochastic modeling of hourly dry-bulb and wet-bulb temperatures

    SciTech Connect (OSTI)

    Kline, D.E.; Woeste, F.E.

    1984-01-01T23:59:59.000Z

    A stochastic model of hourly dry-bulb and wet-bulb temperatures was developed. The periodic variations over the course of a year were estimated by least-square approximation. A multisite Markov model was used to simulate the stochastic nature of the data. These two models were combined to simulate years of hourly dry-bulb and wet-bulb temperatures.

  11. Toward the 24-Hour Knowledge Factory

    E-Print Network [OSTI]

    Gupta, Amar

    2004-03-12T23:59:59.000Z

    The term 24-Hour Knowledge Factory connotes a globally distributed work environment in which members of the global team work on a project around the clock; each member of the team works the normal workday hours that pertain ...

  12. OASIS This Hour and Next Hour ATC data - September 24, 2014

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

    CommitteesTeams Customer Training Interconnection Notices Rates Standards of Conduct Tariff TF Web Based Training Notice: OASIS This Hour and Next Hour ATC data (Updated) Posted...

  13. OASIS This Hour and Next Hour ATC Data - October 21, 2014

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

    CommitteesTeams Customer Training Interconnection Notices Rates Standards of Conduct Tariff TF Web Based Training Notice: OASIS This Hour and Next Hour ATC data Posted Date: 10...

  14. FINANCE DEPARTMENT Office Hours Fall 2014

    E-Print Network [OSTI]

    Gallo, Linda C.

    FINANCE DEPARTMENT Office Hours Fall 2014 NAME OFFICE HOURS COURSE # COURSE TITLE DAY TIME ROOM-1515 and by appointment FIN 323.8 FIN 323.9 FIN 323.11 FIN 326.1 Fundamentals of Finance Fundamentals of Finance Fundamentals of Finance Financial Institution Mgt TTH TTH TH TTH 0930-1045 1100-1215 1600-1840 1230-1345 GMCS

  15. Earned Value Management Essentials 14 hours, $895

    E-Print Network [OSTI]

    Fork, Richard

    Earned Value Management Essentials 14 hours, $895 A growing demand for Earned Value Management (EVM in the tenets of work planned, work accomplished, and actual work cost. Earned Value terminology, formulae Management Analysis and Reporting 14 hours, $895 Government agencies and companies doing business

  16. Fast Approximate Convex Decomposition 

    E-Print Network [OSTI]

    Ghosh, Mukulika

    2012-10-19T23:59:59.000Z

    Approximate convex decomposition (ACD) is a technique that partitions an input object into "approximately convex" components. Decomposition into approximately convex pieces is both more efficient to compute than exact ...

  17. Approximate Maximum Principle for Discrete Approximations of ...

    E-Print Network [OSTI]

    2012-03-20T23:59:59.000Z

    Approximations of Optimal Control Systems with. Nonsmooth .... of any endpoint constraints on trajectories of linear one-dimensional control systems in (PN ).

  18. Toward the 24-Hour Knowledge Factory

    E-Print Network [OSTI]

    Gupta, Amar

    2004-12-10T23:59:59.000Z

    The term 24-Hour Knowledge Factory connotes a globally distributed work environment in which members of the global team work on a project around the clock; each member of the team works the normal workday ...

  19. “Friday off”: Reducing Working Hours in Europe

    E-Print Network [OSTI]

    Kallis, Giorgos

    This article explores the pros and cons for reducing working hours in Europe. To arrive to an informed judgment we review critically the theoretical and empirical literature, mostly from economics, concerning the relation ...

  20. Inventories, Employment and Hours Marzio Galeotti a

    E-Print Network [OSTI]

    Niebur, Ernst

    Inventories, Employment and Hours Marzio Galeotti a , Louis J. Maccini ,*b , Fabio Schiantarelli c that integrates inventory and labor decisions. We extend a model of inventory behavior to include a detailed and effort per worker. We estimate jointly the Euler equations for inventories and employment, a labor

  1. Project Management Foundation 21 hours, $895

    E-Print Network [OSTI]

    Alabama in Huntsville, University of

    ,anddiditmeetthecustomer'srequirements?Participants will become skilled with earned value measures, proficient with performanceindexes.824.6372·800.448.4031 Earn a Professional Certificate In Project Management Certificate awarded after completion ofProject Management Foundation 21 hours, $895 The fundamental project management processes

  2. Team Surpasses 1 Million Hours Safety Milestone

    Broader source: Energy.gov [DOE]

    NISKAYUNA, N.Y. – Vigilance and dedication to safety led the EM program’s disposition project team at the Separations Process Research Unit (SPRU) to achieve a milestone of one million hours — over two-and-a-half-years — without injury or illness resulting in time away from work.

  3. Approximation of Stochastic Process

    E-Print Network [OSTI]

    Alois Pichler

    2012-05-08T23:59:59.000Z

    May 8, 2012 ... The approximation of stochastic processes by trees is an important topic in ... process ? is replaced by a finitely valued stochastic scenario ...

  4. Attachment 3: Hourly Labor Rate Proposal, attachment 3, RFP RHT...

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

    Hourly Labor Rate Proposal RFP RHT-5-52358 Basic Period - Execution through 12 Months Labor Category Base Rate Hourly Labor Overhead % Fringe Benefits % General & Admin. Exp. %...

  5. General Education Coursework: Credit Hours General Education Coursework: Credit Hours MATH 211 4 MATH 212 4

    E-Print Network [OSTI]

    340 3 CEE 350 3 CEE 335 1 CEE 304 3 CEE 240 3 Interpreting the Past 3 Major Coursework: Credit Hours sheet does not include the University's General Education Language and Culture Requirement. Additional

  6. Green Machine Florida Canyon Hourly Data

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

    Vanderhoff, Alex

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 6/1/13 to 6/30/13

  7. 20140430_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 April to 30 April 2014.

  8. 20130416_Green Machine Florida Canyon Hourly Data

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

    Vanderhoff, Alex

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 4/16/13.

  9. Green Machine Florida Canyon Hourly Data 20130731

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

    Vanderhoff, Alex

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 7/1/13 to 7/31/13.

  10. 20140430_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-05-05T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 April to 30 April 2014.

  11. Green Machine Florida Canyon Hourly Data 20130731

    SciTech Connect (OSTI)

    Vanderhoff, Alex

    2013-08-30T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 7/1/13 to 7/31/13.

  12. 20130416_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Vanderhoff, Alex

    2013-04-24T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 4/16/13.

  13. Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Vanderhoff, Alex

    2013-07-15T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 6/1/13 to 6/30/13

  14. Solid state watt-hour meter

    SciTech Connect (OSTI)

    Hurley, J.R.; Gilker, C.S.

    1984-08-21T23:59:59.000Z

    A watt-hour meter is disclosed which includes: a microprocessor coupled to a solid-state Hall-Effect sensor; an electrically alterable ROM coupled to the microprocessor; a power supply; a power outage timing means using the discharge characteristic of a capacitor; apparatus for supplying a 60 Hz clock signal to the microprocessor; a readout device coupled to the microprocessor to provide an indication of the power consumed; an output on the microprocessor for controlling a circuit breaker; and a switch for overriding the microprocessor controlled circuit breaker. The microprocessor and the electrically alterable ROM are connected and programmed: to sense the time of day as determined from an initial time of day and setting the 60 Hz clock signal; to sense and compute the power used by the consumer; to automatically open the circuit breaker when power demand on the electric power source is high and/or the cost per kilowatt hour is high; to automatically close the circuit breaker when the power demand on the source of electric power is low and/or the cost per kilowatt power is low; and to allow a consumer to override the microprocessor's control of the circuit breaker.

  15. ESSENTIAL SKILLS (6-16 credit hours) Writing as Critical Thinking (3 credit hours)

    E-Print Network [OSTI]

    Gering, Jon C.

    (template) Aesthetic--Literature (3 credit hours) CLAS 261 Greek Literature in Translation CLAS 262 Roman Literature RUSS 340 Russian Drama RUSS 370 Survey of Russian Literature I RUSS 371 Survey of Russian Literature II RUSS 420 Modern Russian Novel RUSS 480 Major Russian Writers SPAN 460 Survey of Spanish

  16. International Minor in Engineering: Scandinavian Studies Language: maximum of 12 semester hours # of sem hours

    E-Print Network [OSTI]

    Lee, Tonghun

    semester hours including one 300- or 400-level course and one Political Science/Economics course FR 418 and European Cinema 3 492 New Scandinavian Cinema 3 496 Special Topics in Scandinavian Studies Political Science/Economics Courses: ACE 451 Economics of International Development 3 455 International

  17. International Minor in Engineering: Japanese Studies Language: maximum of 12 semester hours # of sem hours

    E-Print Network [OSTI]

    Lee, Tonghun

    to Classical Japanese 3 409 Social Science Reading in Japanese 3 (H) 440/441 Fourth Year Japanese I/II 3 Other: minimum of 9 semester hours including one 300- or 400-level course and one Political Science (same as EALC 402) 3 MACS 466 Japanese Cinema (same as EALC 466) 3 EALC 250 Introduction to Japanese

  18. International Minor in Engineering: Germanic Studies Language: maximum of 12 semester hours # of sem hours

    E-Print Network [OSTI]

    Lee, Tonghun

    hours including one 300- or 400-level course and one Political Science/Economics course ANTH 488 Modern Realism to Expressionism 3 473 1920s to Today 3 493/494 German Cinema I/II (same as MACS 493/494) 3 496 in Musicology 3 PHIL 325 Recent European Philosophy 3 (H) Approved Political Science/Economics Courses: ACE 451

  19. Multicriteria approximation through decomposition

    SciTech Connect (OSTI)

    Burch, C. [Carnegie Mellon Univ., Pittsburgh, PA (United States). School of Computer Sciences]|[Sandia National Labs., Albuquerque, NM (United States); Krumke, S. [Univ. of Wuerzburg (Germany). Dept. of Computer Science; Marathe, M. [Los Alamos National Lab., NM (United States); Phillips, C. [Sandia National Labs., Albuquerque, NM (United States). Applied Mathematics Dept.; Sundberg, E. [Rutgers Univ., NJ (United States). Dept. of Computer Science]|[Sandia National Labs., Albuquerque, NM (United States)

    1997-12-01T23:59:59.000Z

    The authors propose a general technique called solution decomposition to devise approximation algorithms with provable performance guarantees. The technique is applicable to a large class of combinatorial optimization problems that can be formulated as integer linear programs. Two key ingredients of the technique involve finding a decomposition of a fractional solution into a convex combination of feasible integral solutions and devising generic approximation algorithms based on calls to such decompositions as oracles. The technique is closely related to randomized rounding. The method yields as corollaries unified solutions to a number of well studied problems and it provides the first approximation algorithms with provable guarantees for a number of new problems. The particular results obtained in this paper include the following: (1) The authors demonstrate how the technique can be used to provide more understanding of previous results and new algorithms for classical problems such as Multicriteria Spanning Trees, and Suitcase Packing. (2) They show how the ideas can be extended to apply to multicriteria optimization problems, in which they wish to minimize a certain objective function subject to one or more budget constraints. As corollaries they obtain first non-trivial multicriteria approximation algorithms for problems including the k-Hurdle and the Network Inhibition problems.

  20. Multicriteria approximation through decomposition

    SciTech Connect (OSTI)

    Burch, C. [Carnegie Mellon Univ., Pittsburgh, PA (United States). School of Computer Science; Krumke, S. [Univ. of Wuerzburg (Germany). Dept. of Computer Science; Marathe, M. [Los Alamos National Lab., NM (United States); Phillips, C. [Sandia National Labs., Albuquerque, NM (United States). Applied Mathematics Dept.; Sundberg, E. [Rutgers Univ., NJ (United States). Dept. of Computer Science

    1998-06-01T23:59:59.000Z

    The authors propose a general technique called solution decomposition to devise approximation algorithms with provable performance guarantees. The technique is applicable to a large class of combinatorial optimization problems that can be formulated as integer linear programs. Two key ingredients of their technique involve finding a decomposition of a fractional solution into a convex combination of feasible integral solutions and devising generic approximation algorithms based on calls to such decompositions as oracles. The technique is closely related to randomized rounding. Their method yields as corollaries unified solutions to a number of well studied problems and it provides the first approximation algorithms with provable guarantees for a number of new problems. The particular results obtained in this paper include the following: (1) the authors demonstrate how the technique can be used to provide more understanding of previous results and new algorithms for classical problems such as Multicriteria Spanning Trees, and Suitcase Packing; (2) they also show how the ideas can be extended to apply to multicriteria optimization problems, in which they wish to minimize a certain objective function subject to one or more budget constraints. As corollaries they obtain first non-trivial multicriteria approximation algorithms for problems including the k-Hurdle and the Network Inhibition problems.

  1. GPA CALCULATION GPA = QUALITY POINTS DIVIDED BY QUALITY HOURS

    E-Print Network [OSTI]

    Lawrence, Rick L.

    . THIS IS THE TOTAL QUALITY POINTS THAT YOU THINK YOU WILL EARN THIS SEMESTER. TO PLAY WHAT IFGPA CALCULATION WORKSHEET GPA = QUALITY POINTS DIVIDED BY QUALITY HOURS #1 QUALITY HOURS (THROUGH LAST TERM) = __________ #2 QUALITY POINTS (THROUGH LAST TERM) = __________ #3 QUALTIY HOURS CURRENTLY

  2. Delayed Start or Cancellation of Business Hours | Argonne National...

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

    is delayed The laboratory may delay the start of regular business hours because of weather conditions. Personnel who have been explicitly designated as essential by their line...

  3. Uniform asymptotic approximations of integrals 

    E-Print Network [OSTI]

    Khwaja, Sarah Farid

    2014-07-01T23:59:59.000Z

    In this thesis uniform asymptotic approximations of integrals are discussed. In order to derive these approximations, two well-known methods are used i.e., the saddle point method and the Bleistein method. To start with ...

  4. Exact Approximate Learning Paul Fearnhead

    E-Print Network [OSTI]

    Guo, Zaoyang

    of sea structures development of new techniques for harnessing sea energy Data is 3-hourly wave heights The wave heights at a particular location change over time Understanding wave heights is key to security

  5. HUMAN RESOURCES MANUAL SECTION 4: NON-STUDENT HOURLY EMPLOYEES

    E-Print Network [OSTI]

    HUMAN RESOURCES MANUAL SECTION 4: NON-STUDENT HOURLY EMPLOYEES 1 | P a g e S e c t i o n 4 will be notified by the Human Resources Department as non-student hourly employees approach their employment limits is submitted to the Human Resources Department by March and October for each school term of each year

  6. Did you know? are thrown away every hour.

    E-Print Network [OSTI]

    Awtar, Shorya

    17Trees 6weeks Plastic beverage bottles OR Every month,we throw out enough glass bottles and jars,but not many people realize it. Run a TV for three hours. A 100-watt light bulb for four hours. Used plastic soda & juice bottles are used to make: carpets insulating materi- als in clothes sleeping bags

  7. General Education and Major Coursework: Credit Hours General Education and Major Coursework: Credit Hours ENGN 110 2 ECE 111 2

    E-Print Network [OSTI]

    : 128 ** Meets philosophy and ethics general education requirement. Electrical engineering majors mustGeneral Education and Major Coursework: Credit Hours General Education and Major Coursework: Credit (C or better required) 3 PHYS 231N 4 COMM 101R 3 General Education and Major Coursework: Credit Hours

  8. Supporting Text Approximation of the Multinomial. Using Stirling's approximation

    E-Print Network [OSTI]

    Peterson, Carsten

    Supporting Text Approximation of the Multinomial. Using Stirling's approximation n! (n/e)n 2n! . [S12] To calculate B L (^n) limN BN L (^n), we apply Stirling's formula to N!, n0!, and n1!, which that r Stirling's formula

  9. Pay and Leave Administration and Hours of Duty

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2005-01-14T23:59:59.000Z

    This Order establishes requirements and responsibilities for the management of pay, including overtime and compensatory time, leave administration, and hours of duty. Cancels DOE O 322.1A. Canceled by DOE O 322.1C.

  10. Pay and Leave Administration and Hours of Duty

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-01-19T23:59:59.000Z

    The order establishes requirements and responsibilities for the management of pay, including overtime pay and compensatory time, leave administration, time and attendance reporting, and hours of duty. Cancels DOE O 322.1B and DOE O 535.1

  11. BIODEGRADATION AND BIOREMEDIATION 3 credit hour (Web based only)

    E-Print Network [OSTI]

    Ma, Lena

    SWS 6366 BIODEGRADATION AND BIOREMEDIATION 3 credit hour (Web based only) COURSE DESCRIPTION of bioremediation of contaminated soils and water. INSTRUCTORS: Dr. Kanika Sharma Inglett, Department of Soil & Biodegradation Potential Topic 5. Predicting Biodegradation Products Topic 6. Bioremediation of organic

  12. Balancing Authority Cooperation Concepts - Intra-Hour Scheduling

    SciTech Connect (OSTI)

    Hunsaker, Matthew; Samaan, Nader; Milligan, Michael; Guo, Tao; Liu, Guangjuan; Toolson, Jacob

    2013-03-29T23:59:59.000Z

    The overall objective of this study was to understand, on an Interconnection-wide basis, the effects intra-hour scheduling compared to hourly scheduling. Moreover, the study sought to understand how the benefits of intra-hour scheduling would change by altering the input assumptions in different scenarios. This report describes results of three separate scenarios with differing key assumptions and comparing the production costs between hourly scheduling and 10-minute scheduling performance. The different scenarios were chosen to provide insight into how the estimated benefits might change by altering input assumptions. Several key assumptions were different in the three scenarios, however most assumptions were similar and/or unchanged among the scenarios.

  13. Oak Ridge: Approaching 4 Million Safe Work Hours

    Broader source: Energy.gov [DOE]

    Workers at URS | CH2M Oak Ridge (UCOR), the prime contractor for EM’s Oak Ridge cleanup, are approaching a milestone of 4 million safe work hours without a lost time away incident.

  14. Department of Energy's Paducah Site Reaches Million-Hour Safety...

    Office of Environmental Management (EM)

    a core value" attitude. "Our team adheres to the concept that we will only achieve productivity through safety," LATA Kentucky Project Manager Mark Duff said. "The million-hour...

  15. Verification of hourly forecasts of wind turbine power output

    SciTech Connect (OSTI)

    Wegley, H.L.

    1984-08-01T23:59:59.000Z

    A verification of hourly average wind speed forecasts in terms of hourly average power output of a MOD-2 was performed for four sites. Site-specific probabilistic transformation models were developed to transform the forecast and observed hourly average speeds to the percent probability of exceedance of an hourly average power output. (This transformation model also appears to have value in predicting annual energy production for use in wind energy feasibility studies.) The transformed forecasts were verified in a deterministic sense (i.e., as continuous values) and in a probabilistic sense (based upon the probability of power output falling in a specified category). Since the smoothing effects of time averaging are very pronounced, the 90% probability of exceedance was built into the transformation models. Semiobjective and objective (model output statistics) forecasts were made compared for the four sites. The verification results indicate that the correct category can be forecast an average of 75% of the time over a 24-hour period. Accuracy generally decreases with projection time out to approx. 18 hours and then may increase due to the fairly regular diurnal wind patterns that occur at many sites. The ability to forecast the correct power output category increases with increasing power output because occurrences of high hourly average power output (near rated) are relatively rare and are generally not forecast. The semiobjective forecasts proved superior to model output statistics in forecasting high values of power output and in the shorter time frames (1 to 6 hours). However, model output statistics were slightly more accurate at other power output levels and times. Noticeable differences were observed between deterministic and probabilistic (categorical) forecast verification results.

  16. General Education and Major Coursework: Credit Hours General Education and Major Coursework: Credit Hours MET 120 3 MET 240 3

    E-Print Network [OSTI]

    Coursework: Credit Hours MET 300 3 MET 330 3 MET 310 3 MET 335W 1 MET 320 3 MET 350 3 EET 305 3 MET 370 (co-requisite with MET 386) 3 EET 350 3 MET 386 (co-requisite with MET 370) 1 EET 355 1 ENMA 480 3 Minor**** 3 General (15 credits) TOTAL CREDIT HOURS: 127 Does not include the University's General Education Language

  17. Mechanism design with approximate types

    E-Print Network [OSTI]

    Zhu, Zeyuan Allen

    2012-01-01T23:59:59.000Z

    In mechanism design, we replace the strong assumption that each player knows his own payoff type exactly with the more realistic assumption that he knows it only approximately: each player i only knows that his true type ...

  18. Transient approximations in queueing networks

    E-Print Network [OSTI]

    Andrewartha, John Michael

    1989-01-01T23:59:59.000Z

    TRANSIENT APPROXIMATIONS IN QUEUEING NETWORKS A Thesis by JOHN MICHAEL ANDREWARTHA 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 May 1989... Major Subject: Electrical Engineering TRANSIENT APPROXIMATIONS IN QUEUEING NETWORKS A Thesis JOHN MICHAEL ANDREWARTHA Approved as to style and content by: P. E. Cantrell (Chair of Committee) m P7~ W. K. Tsai (Member) J. D. Gibson (Member) R...

  19. An Improved Procedure for Developing Calibrated Hourly Simulation Models

    E-Print Network [OSTI]

    Bou-Saada, T. E.; Haberl, J. S.

    in Washington, D.C. Nine months of hourly whole-building electricity data and site-specific weather data were measured and used with the DOE- 2. ID building simulation program to test the new techniques. Use of the new calibration procedures were able to produce... study building was simulated with DOE-2.ID and calibrated using hourly measured whole-building electricity data and ambient weather conditions to demonstrate the new techniques. Findings from Applying the New Techniques The important new calibration...

  20. 2009-2010 Communication Studies Curriculum Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2009-2010 Communication Studies Curriculum Hours PREREQUISITES First Year Communication and Information 150 3 ___ Communication Studies 201 3 ___ Communication and Information 150 English 101, 102 6 Arts and Humanities Elective 3 ___ General Elective 1 ___ TOTAL 30 Second Year Communication Studies

  1. 2007-2008 Communication Studies Curriculum Year Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2007-2008 Communication Studies Curriculum Year Hours PREREQUISITES First Year Communication and Information 150 3 ___ Communication Studies 201 3 ___ Communication and Information 150 English 101, 102 6 Arts and Humanities Elective 3 ___ General Elective 1 ___ TOTAL 30 Second Year Communication Studies

  2. 2011-12 Communication Studies Curriculum Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2011-12 Communication Studies Curriculum Hours PREREQUISITES First Year English 101, 102 6 ___ ___ TOTAL 30 Second Year Communication Studies 201 3 ___ 5 Communication Studies 210, 240, 250 6 Year Communication Studies 312 3 ___ Communication Studies 201 Communication Studies 342 3

  3. 2008-2009 Communication Studies Curriculum Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2008-2009 Communication Studies Curriculum Hours PREREQUISITES First Year Communication and Information 150 3 ___ Communication Studies 201 3 ___ Communication and Information 150 English 101, 102 6 Arts and Humanities Elective 3 ___ General Elective 1 ___ TOTAL 30 Second Year Communication Studies

  4. 2010-11 Communication Studies Curriculum Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2010-11 Communication Studies Curriculum Hours PREREQUISITES First Year English 101, 102 6 ___ ___ TOTAL 30 Second Year Communication Studies 201 3 ___ 5 Communication Studies 210, 240, 250 6 Year Communication Studies 312 3 ___ Communication Studies 201 Communication Studies 342 3

  5. 2012-13 Communication Studies Curriculum Hours PREREQUISITES

    E-Print Network [OSTI]

    Grissino-Mayer, Henri D.

    2012-13 Communication Studies Curriculum Hours PREREQUISITES First Year English 101*, 102* 6 ___ ___ TOTAL 30 Second Year Communication Studies 201 3 ___ 5 Communication Studies 210*, 240*, 250 6 Third Year Communication Studies 312 3 ___ Communication Studies 201 Communication Studies 342 3

  6. ECE 3301: General Electrical Engineering Credit / Contact hours: 3 / 3

    E-Print Network [OSTI]

    Gelfond, Michael

    ECE 3301: General Electrical Engineering Credit / Contact hours: 3 / 3 Course coordinator: Mary Baker Textbook(s) and/or other required material: Hambley, Allan R., Electrical Engineering ­ Principles and Applications, fourth edition, Prentice Hall, 2007. Catalog description: Analysis of electric circuits

  7. Pay and Leave Administration and Hours of Duty

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-01-19T23:59:59.000Z

    The order establishes requirements and responsibilities for the management of pay, including overtime pay and compensatory time, leave administration, time and attendance reporting, and hours of duty. Cancels DOE O 322.1B and DOE O 535.1. Admin Chg 1, dated 5-10-12, cancels DOE O 322.1C.

  8. Truman Leadership Scholars Program Credit Hour Modification Rationale

    E-Print Network [OSTI]

    Gering, Jon C.

    Truman Leadership Scholars Program Credit Hour Modification Rationale Doug Davenport The Truman Leadership Scholars Program (TLSP) has undergone significant changes over the past year. A key element 220 are now designed to introduce students to key leadership concepts and theories, using a basic

  9. Renewable Energies program (6 credit hour) Option A: 11

    E-Print Network [OSTI]

    Simaan, Nabil

    Renewable Energies program (6 credit hour) Option A: 11 Option B: The program is organized by t Spanish Institute and the Asso program on renewable energy will provide students with advanced knowledge. opportunities: option A- two renewable energies; option B include on-site visits to renewable energy generation

  10. Aegis Combat and Weapon Systems Overview 24 hours, $1495

    E-Print Network [OSTI]

    Fork, Richard

    SEprocessensuresthatsystemsaredevelopedtomeet affordable, operationally effective, and timely mission objectives. FocusonengineeringtheWeaponAegis Combat and Weapon Systems Overview 24 hours, $1495 Launched from the Advanced Surface Missile that led to the initiation of Aegis. Topics Include: · AegisOverviewandHistory · AegisBMD · AegisWeapon

  11. BIODEGRADATION AND BIOREMEDIATION 3 credit hour (Web based only)

    E-Print Network [OSTI]

    Ma, Lena

    SWS 6366 BIODEGRADATION AND BIOREMEDIATION 3 credit hour (Web based only) COURSE DESCRIPTION of bioremediation of contaminated soils and water. INSTRUCTORS: Dr. Kanika Sharma Inglett, Department of Soil Biodegradation Products Topic 6. Bioremediation of organic and inorganic pollutants Topic 7. Remediation

  12. Navy Estimated Average Hourly Load Profile by Month (in MW)

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

    Navy Estimated Average Hourly Load Profile by Month (in MW) MONTH HE1 HE2 HE3 HE4 HE5 HE6 HE7 HE8 HE9 HE10 HE11 HE12 HE13 HE14 HE15 HE16 HE17 HE18 HE19 HE20 HE21 HE22 HE23 HE24...

  13. SWAIN LIBRARY -INTERSESSION AND WINTER CLOSURE HOURS DECEMBER 14TH

    E-Print Network [OSTI]

    Straight, Aaron

    Green Library will be open December 22-23, 26, 29-31, and January 2, 8 a.m.-5 p.m. with limited servicesSWAIN LIBRARY - INTERSESSION AND WINTER CLOSURE HOURS DECEMBER 14TH , 2008 ­ JANUARY 5TH , 2009. Branch Libraries that are open, circulation desks will be open for borrowing only. All other services

  14. Bias adjustment of radar-based 3-hour precipitation accumulations

    E-Print Network [OSTI]

    Stoffelen, Ad

    projection of KNMI radar images 55 4 #12;Chapter 1 Introduction Since June 2003 a daily gauge is generated at 1400 UTC when the majority of the manual gauge observations have been reported. The radar-gaugeBias adjustment of radar-based 3-hour precipitation accumulations Iwan Holleman Technical Report

  15. Monday 16 June 09:30 Macroeconomics. 14:30 Advanced Econometrics 1 (2 hours).

    E-Print Network [OSTI]

    Oxford, University of

    Monday 16 June 09:30 Macroeconomics. 14:30 Advanced Econometrics 1 (2 hours). Tuesday 17 June 09 2 (2 hours). 14:30 Advanced Econometrics 2 (2 hours). Friday 20 June 09:30 Advanced Microeconomics 1

  16. International Minor in Engineering: Russian/Eastern European Studies Language: maximum of 12 semester hours # of sem hours

    E-Print Network [OSTI]

    Lee, Tonghun

    semester hours including one 300- or 400-level course and one Political Science/Economics course BULG 482;POL 245 Survey of Polish Lit (same as CWL 245) 3 446 Problems of Polish Lit 3 RUSS 219 Russian Cinema & E European Science Fiction (same as CWL 117) 3 277 Slavic Literature Survey(same as CWL 277) 3 419

  17. Ionospheric effects during first 2 hours after the Chelyabinsk meteorite impact

    E-Print Network [OSTI]

    Berngardt, O I; Zherebtsov, G A; Kusonski, O A; Grigorieva, S A

    2013-01-01T23:59:59.000Z

    This paper presents the analysis of ionospheric effects in the region close to the Chelyabinsk meteorite explosion at 03:20UT 2013 February 15 from the Institute of Solar-Terrestrial Physics of Siberian Branch of Russian Academy of Sciences (ISTP SB RAS) EKB radar data, and from the Institute of Geophysics of Ural Branch of Russian Academy of Sciences (IG UB RAS) PARUS ionosonde data. Both instruments are located within the IG UB RAS Arti Observatory approximately 200 km northward from the estimated explosion site. According to the data obtained, the ionospheric disturbance caused by the meteorite flyby, explosion, and impact had high dynamics and amplitude. However, it obviously did not lead to a variation in the ionosphere mean parameters in the region above the disturbance center during the first 2 hours. Essential effects, however, were observed at more than 100-200 km from the explosion site and farther up to 1500 km.

  18. On-line and Approximation Algorithms Fall Semester, 2009/10 Final Exam: January 25, 2010

    E-Print Network [OSTI]

    Azar, Yossi

    On-line and Approximation Algorithms Fall Semester, 2009/10 Final Exam: January 25, 2010 Lecturer capacity. At round i we receive a request to connect si to ti with one of two options. The first non additive constant is needed). The duration of the exam is 3 hours. GOOD LUCK 1 #12;

  19. Incident Weekdays After Hours Suicide--Imminent threat or attempt

    E-Print Network [OSTI]

    , 7th Floor, 333 E. Campus Mall Walk-In Counseling at UHS, 7th Floor Medical emergency (e.g. heart-265-5600 UHS Urgent Medical Advice by Phone 608-265- 5600, option 1, until 9:00pm Rape Crisis Center (RCC), 333) Domestic Abuse Intervention Services 24-Hour crisis hotline: 608-251-4445 UWPD: 608-264-COPS (2677

  20. Energy Conservation3. Lab Spaces 8 hours ago

    E-Print Network [OSTI]

    Espinosa, Horacio D.

    Home1. Topics2. Energy Conservation3. Story4. Powered by Lab Spaces 8 hours ago 3-dimensional view://topics.treehugger.com/article/0cywbNJgWneQp?q=Energy+Conserv... 1 of 2 1/6/2012 9:05 PM #12;Related Quotes " The measurements were http://topics.treehugger.com/article/0cywbNJgWneQp?q=Energy+Conserv... 2 of 2 1/6/2012 9:05 PM #12;

  1. Convex approximations in stochastic programming by semidefinite ...

    E-Print Network [OSTI]

    2010-04-19T23:59:59.000Z

    This experience leads us to force the convexity of the approximating quadratic ..... As we can see, the least-squares approximation works well only if the data ...

  2. 20140501-0531_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 May to 31 May 2014.

  3. 20140201-0228_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Feb to 28 Feb 2014.

  4. 20131201-1231_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Dec to 31 Dec 2013.

  5. 20140601-0630_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 June to 30 June 2014.

  6. 20131101-1130_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Nov to 30 Nov 2013.

  7. 20130801-0831_Green Machine Florida Canyon Hourly Data

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

    Vanderhoff, Alex

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 8/1/13 to 8/31/13.

  8. 20130501-20130531_Green Machine Florida Canyon Hourly Data

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

    Vanderhoff, Alex

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from May 2013

  9. 20131001-1031_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 1 Oct 2013 to 31 Oct 2013.

  10. 20140701-0731_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 July to 31 July 2014.

  11. 20140301-0331_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Mar to 31 Mar 2014.

  12. 20140101-0131_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Jan to 31 Jan 2014.

  13. 20130901-0930_Green Machine Florida Canyon Hourly Data

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

    Thibedeau, Joe

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 1 September 2013 to 30 September 2013.

  14. 20131101-1130_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2013-12-02T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Nov to 30 Nov 2013.

  15. 20140501-0531_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-06-02T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 May to 31 May 2014.

  16. 20131001-1031_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2013-11-05T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 1 Oct 2013 to 31 Oct 2013.

  17. 20130901-0930_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2013-10-25T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 1 September 2013 to 30 September 2013.

  18. 20140101-0131_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-02-03T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Jan to 31 Jan 2014.

  19. 20140701-0731_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-07-31T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 July to 31 July 2014.

  20. 20140601-0630_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-06-30T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 June to 30 June 2014.

  1. 20130501-20130531_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Vanderhoff, Alex

    2013-06-18T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from May 2013

  2. 20131201-1231_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-01-08T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Dec to 31 Dec 2013.

  3. 20140201-0228_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-03-03T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Feb to 28 Feb 2014.

  4. 20130801-0831_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Vanderhoff, Alex

    2013-09-10T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 8/1/13 to 8/31/13.

  5. 20140301-0331_Green Machine Florida Canyon Hourly Data

    SciTech Connect (OSTI)

    Thibedeau, Joe

    2014-04-07T23:59:59.000Z

    Employing innovative product developments to demonstrate financial and technical viability of producing electricity from low temperature geothermal fluids, coproduced in a mining operation, by employing ElectraTherm's modular and mobile heat-to-power "micro geothermal" power plant with output capacity expected in the 30-70kWe range. The Green Machine is an Organic Rankine Cycle power plant. The Florida Canyon machine is powered by geothermal brine with air cooled condensing. The data provided is an hourly summary from 01 Mar to 31 Mar 2014.

  6. Amp-hour counting control for PV hybrid power systems

    SciTech Connect (OSTI)

    Hund, T.D. [Sandia National Labs., Albuquerque, NM (United States); Thompson, B. [Biri Systems, Ithaca, NY (United States)

    1997-06-01T23:59:59.000Z

    The performance of an amp-hour (Ah) counting battery charge control algorithm has been defined and tested using the Digital Solar Technologies MPR-9400 microprocessor based PV hybrid charge controller. This work included extensive field testing of the charge algorithm on flooded lead-antimony and valve regulated lead-acid (VRLA) batteries. The test results after one-year have demonstrated that PV charge utilization, battery charge control, and battery state of charge (SOC) has been significantly improved by providing maximum charge to the batteries while limiting battery overcharge to manufacturers specifications during variable solar resource and load periods.

  7. Approximating Metal-Insulator Transitions

    E-Print Network [OSTI]

    C. Danieli; K. Rayanov; B. Pavlov; G. Martin; S. Flach

    2014-05-06T23:59:59.000Z

    We consider quantum wave propagation in one-dimensional quasiperiodic lattices. We propose an iterative construction of quasiperiodic potentials from sequences of potentials with increasing spatial period. At each finite iteration step the eigenstates reflect the properties of the limiting quasiperiodic potential properties up to a controlled maximum system size. We then observe approximate metal-insulator transitions (MIT) at the finite iteration steps. We also report evidence on mobility edges which are at variance to the celebrated Aubry-Andre model. The dynamics near the MIT shows a critical slowing down of the ballistic group velocity in the metallic phase similar to the divergence of the localization length in the insulating phase.

  8. Hybrid methodology for hourly global radiation forecasting in Mediterranean area

    E-Print Network [OSTI]

    Voyant, Cyril; Paoli, Christophe; Nivet, Marie Laure

    2012-01-01T23:59:59.000Z

    The renewable energies prediction and particularly global radiation forecasting is a challenge studied by a growing number of research teams. This paper proposes an original technique to model the insolation time series based on combining Artificial Neural Network (ANN) and Auto-Regressive and Moving Average (ARMA) model. While ANN by its non-linear nature is effective to predict cloudy days, ARMA techniques are more dedicated to sunny days without cloud occurrences. Thus, three hybrids models are suggested: the first proposes simply to use ARMA for 6 months in spring and summer and to use an optimized ANN for the other part of the year; the second model is equivalent to the first but with a seasonal learning; the last model depends on the error occurred the previous hour. These models were used to forecast the hourly global radiation for five places in Mediterranean area. The forecasting performance was compared among several models: the 3 above mentioned models, the best ANN and ARMA for each location. In t...

  9. Multi-layer diffusion approximation for photon transport in biological tissue

    E-Print Network [OSTI]

    Hollmann, Joseph

    2009-06-02T23:59:59.000Z

    turbid medium illuminated by normal incidence usually took about one and a half hours while oblique incidence required fifteen hours. 4.1 Results Both the single-source and double-source approximations are tested in two cases. First, the thickness... )sin()sin( imta nn ?? = (A2) Photons incident upon the medium at an angle greater than the critical angle, given by ? ? ? ? ? ? ? ? = m a c n n asin? , (A3) are assumed to be internally reflected. The radiance or intensity of light...

  10. Seventy-five hours of coordinated videomagnetograph observations

    SciTech Connect (OSTI)

    Wang, Haiman; Zirin, H.; Patterson, A.; Al, Guoxiang; Zhang, Hongqi (Big Bear Solar Observatory, Pasadena, CA (USA); Beijing Observatory (People's Republic of China))

    1989-08-01T23:59:59.000Z

    Videomagnetograph observations obtained between September 24 and 29, 1987 are presented which illustrate the evolution of magnetic flux surrounding a stable sunspot. It is found that the dominant sunspot mainly ejects magnetic fields of opposite sign, and that the surrounding plage fields steadily contract and retreat inward toward the umbra, resulting in shrinking and weakening of the spot and plage. The extent of the moat is shown to be reduced by 50 percent in a 75-hour period, with the principal loss of flux probably due to concellation at the main neutral line. Five subflares were noted, three occurring prior to cancellation of the magnetic elements at the inversion line and two occurring during the development and disappearance of an ephemeral bipolar region. 25 refs.

  11. Reflectance Function Approximation for Material Classification

    E-Print Network [OSTI]

    Dyer, Charles R.

    Reflectance Function Approximation for Material Classification Edward Wild CS 766 Final Project This report summarizes the results of a project to approximate reflectance functions and classify materials to classify materials. Classification algorithms are proposed to deal with unseen materials. Experimental

  12. Hacking Away at Soft Costs: 24-Hour Coding Event Focuses on Expanding...

    Office of Environmental Management (EM)

    Hacking Away at Soft Costs: 24-Hour Coding Event Focuses on Expanding Solar Market Hacking Away at Soft Costs: 24-Hour Coding Event Focuses on Expanding Solar Market May 7, 2014 -...

  13. Road traffic accidents in Kathmandużan hour of education yields a glimmer of hope

    E-Print Network [OSTI]

    Basnet, Bibhusan; Vohra, Rais; Bhandari, Amit; Pandey, Subash

    2013-01-01T23:59:59.000Z

    et al. : Road traffic accidents in Kathmandu— an hour ofOpen Access Road traffic accidents in Kathmandu—an hour ofnumber of road traffic accidents in the year 2012 decreased

  14. Workers at Paducah Site Exceed 1.5 Million Hours Without Lost...

    Office of Environmental Management (EM)

    at Paducah Site Exceed 1.5 Million Hours Without Lost-Time Injury, Illness Workers at Paducah Site Exceed 1.5 Million Hours Without Lost-Time Injury, Illness October 30, 2014 -...

  15. A Model to Predict Work-Related Fatigue Based on Hours of Work

    E-Print Network [OSTI]

    A Model to Predict Work-Related Fatigue Based on Hours of Work Gregory D. Roach, Adam Fletcher, and Drew Dawson ROACH GD, FLETCHER A, DAWSON D. A model to predict work- related fatigue based on hours

  16. EPA ENERGY STAR Webcast: Portfolio Manager Office Hours, Focus Topic: Sharing Forward and Transfer Ownership

    Broader source: Energy.gov [DOE]

    Portfolio Manager "Office Hours" is a live webinar that gives all users an opportunity to ask their questions directly to EPA in an open forum. In 2014, Office Hours will be held once a month. We...

  17. EPA ENERGY STAR Webcast- Portfolio Manager Office Hours, Focus Topic: Weather Data and Metrics

    Broader source: Energy.gov [DOE]

    Portfolio Manager "Office Hours" is a live webinar that gives all users an opportunity to ask their questions directly to EPA in an open forum. In 2014, Office Hours will be held once a month. We...

  18. after-hours care instructions: Topics by E-print Network

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

    Websites Summary: HC:816 (214) After Hours Care Info Sheet Closest ER After Hours Care Note: for students with Student Health Insurance Plan (UC SHIP) Co-pays apply: 50...

  19. 3. Measurements Measurements have been carried out at Lundebjerg for a little less than one half year from

    E-Print Network [OSTI]

    PV-power from on third of the PV-gable (se figure 2.5) de- livered by the inverter to the grid. Due. The reason for this is assumed to be the condition of the grid to which the inverter delivers the PV power and the often not correct running of the PV-VENT systems it is still believed that the measuring camping has

  20. Kinetic Modeling and Thermodynamic Closure Approximation of ...

    E-Print Network [OSTI]

    2007-10-03T23:59:59.000Z

    Oct 5, 2007 ... Kinetic Modeling and Thermodynamic Closure. Approximation of Liquid Crystal Polymers. Haijun Yu. Program in Applied and Computational ...

  1. Fast Local Approximation to Global Illumination

    E-Print Network [OSTI]

    Wyman, Chris

    based technique #12;Approach to Shadows · Assume: ­ Approximate shadow umbra with hard shadow ­ Object

  2. Finite element approximation of coupled seismic and ...

    E-Print Network [OSTI]

    zyserman

    layer, having a thickness of about 10 nm. Finite element approximation of coupled seismic and electromagnetic waves in gas hydrate-bearing sediments – p.

  3. Optimization Online - Equivalence of an Approximate Linear ...

    E-Print Network [OSTI]

    Alejandro Toriello

    2013-02-07T23:59:59.000Z

    Feb 7, 2013 ... Equivalence of an Approximate Linear Programming Bound with the Held-Karp Bound for the Traveling Salesman Problem. Alejandro Toriello ...

  4. Optimization Online - Probabilistic optimization via approximate p ...

    E-Print Network [OSTI]

    W. van vAckooij

    2015-05-27T23:59:59.000Z

    May 27, 2015 ... Probabilistic optimization via approximate p-efficient points and bundle methods. W. van vAckooij(wim.van-ackooij ***at*** edf.fr )

  5. Successive Convex Approximations to Cardinality-Constrained ...

    E-Print Network [OSTI]

    2012-04-16T23:59:59.000Z

    Replacing the ?0-norm (car- dinality) constraint in (P) by the above DC approximation ?(x, t), we obtain the following quadratic program with a DC constraint: (Pt).

  6. Approximations by Orthonormal Mapped Chebyshev Functions for ...

    E-Print Network [OSTI]

    2014-03-12T23:59:59.000Z

    a School of Mathematical Science, Xiamen University, 361005 Xiamen, China .... suitable mapping can be used to approximate functions on the whole line R (cf.

  7. Section 2.5: Approximations Using Increments

    E-Print Network [OSTI]

    2014-04-05T23:59:59.000Z

    Feb 26, 2014 ... Lesson 19. Definition. Examples. In this lesson we will discuss a method for approximating the value of a function at a specified point.

  8. Operating experience and lessons learned at Alabama Electric Cooperative`s 110-MW 26-hour CAES plant

    SciTech Connect (OSTI)

    Andersson, L.; Davis, L.; Schainker, R.

    1995-12-31T23:59:59.000Z

    Energy storage options for utilities technologies using hydrostatic-head-, compressed air-, battery-, superconducting-magnet-, and flywheel-based power generation. Among these technologies, compressed-air energy storage (CAES) offers specific cost advantage in its range of capacity and stored energy. Partly because of this cost advantage, Alabama Electric Cooperative (AEC), with assistance from the Electric Power Research Institute (EPRI), now operates the first CAES power plant in the United States. This 110-MW, 26-hour CAES plant is located on top of the McIntosh salt dome, approximately 40 miles north of Mobile, Alabama. Energy Storage and Power Consultants, Inc. (ESPC) is Technical Engineering Support Contractor to EPRI on the project. This paper addresses operating statistics, narrates problems that influenced power generation, and provides selected lessons learned. Unit availability and reliability are noted and major events that affected them identified.

  9. Blood Management Using Approximate Linear Programming

    E-Print Network [OSTI]

    Shenoy, Prashant

    Blood Management Using Approximate Linear Programming Marek Petrik and Shlomo Zilberstein January 13th, 2009 Marek Petrik and Shlomo Zilberstein () Blood Management Using Approximate Linear ProgrammingJanuary 13th, 2009 1 / 36 #12;Blood Inventory Management Problem Regional blood banks: Aggregate

  10. Approximate error conjugation gradient minimization methods

    DOE Patents [OSTI]

    Kallman, Jeffrey S

    2013-05-21T23:59:59.000Z

    In one embodiment, a method includes selecting a subset of rays from a set of all rays to use in an error calculation for a constrained conjugate gradient minimization problem, calculating an approximate error using the subset of rays, and calculating a minimum in a conjugate gradient direction based on the approximate error. In another embodiment, a system includes a processor for executing logic, logic for selecting a subset of rays from a set of all rays to use in an error calculation for a constrained conjugate gradient minimization problem, logic for calculating an approximate error using the subset of rays, and logic for calculating a minimum in a conjugate gradient direction based on the approximate error. In other embodiments, computer program products, methods, and systems are described capable of using approximate error in constrained conjugate gradient minimization problems.

  11. Analysis of Sub-Hourly Ramping Impacts of Wind Energy and Balancing Area Size: Preprint

    SciTech Connect (OSTI)

    Milligan, M.; Kirby, B.

    2008-06-01T23:59:59.000Z

    In this paper, we analyze sub-hourly ramping requirements and the benefit of combining Balancing Authority operations with significant wind penetrations.

  12. Add to your Holiday menu: "Canap ", a glass of punch during cocktail hour

    E-Print Network [OSTI]

    Add to your Holiday menu: "Canapé ", a glass of punch during cocktail hour and ˝ of bottle of wine per person For only $27.00 per person

  13. Mifepristone and Misoprostol Administered Simultaneously Versus 24 Hours Apart for Abortion

    E-Print Network [OSTI]

    Creinin, Mitchell David

    2007-01-01T23:59:59.000Z

    mifepristone in combination with miso- prostol administeredA randomized comparison of miso- prostol 6 to 8 hours versusmifepristone 200 mg and vaginal miso- prostol for abortion.

  14. after-hours power status: Topics by E-print Network

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

    compensation medical care coverage applies to all employees who are authorized to Environmental Sciences and Ecology Websites Summary: AFTER HOURS WORK-RELATED INJURIES Workers'...

  15. Gravity Lab Notes for Teachers Timing: This lab should take approximately 1.5 hours. There are 2 separate sections with

    E-Print Network [OSTI]

    Spakowitz, Andrew J.

    : Was there a significant difference in the time of falling for the ping-pong ball versus the marble? Does the acceleration 6in long, but the precise size does not matter) · 1-2 thick textbooks · 2 large marbles · 1 ping fall along a straight line? Yes, it should. What is the slope of the line? Slope should

  16. Wave-mechanics and the adhesion approximation

    E-Print Network [OSTI]

    C. J. Short; P. Coles

    2006-11-22T23:59:59.000Z

    The dynamical equations describing the evolution of a self-gravitating fluid of cold dark matter (CDM) can be written in the form of a Schrodinger equation coupled to a Poisson equation describing Newtonian gravity. It has recently been shown that, in the quasi-linear regime, the Schrodinger equation can be reduced to the exactly solvable free-particle Schrodinger equation. The free-particle Schrodinger equation forms the basis of a new approximation scheme -the free-particle approximation - that is capable of evolving cosmological density perturbations into the quasi-linear regime. The free-particle approximation is essentially an alternative to the adhesion model in which the artificial viscosity term in Burgers' equation is replaced by a non-linear term known as the quantum pressure. Simple one-dimensional tests of the free-particle method have yielded encouraging results. In this paper we comprehensively test the free-particle approximation in a more cosmologically relevant scenario by appealing to an N-body simulation. We compare our results with those obtained from two established methods: the linearized fluid approach and the Zeldovich approximation. We find that the free-particle approximation comprehensively out-performs both of these approximation schemes in all tests carried out and thus provides another useful analytical tool for studying structure formation on cosmological scales.

  17. XXX CORE COURSES SFA MAJOR REQUIREMENTS SFA Communication (1214 hours) College requirements

    E-Print Network [OSTI]

    Long, Nicholas

    XXX CORE COURSES SFA MAJOR REQUIREMENTS SFA Communication (1214 hours) College requirements,1412 SPAN 1411,1412 beginning foreign language SPH 172, 272. Note 2 35 hours of mathematics from XXX Core College of Fine Arts (936) 4684804 Office of Admissions (936) 4682504 and XXXXX COLLEGE 200809 XXX

  18. Forecasting the Hourly Ontario Energy Price by Multivariate Adaptive Regression Splines

    E-Print Network [OSTI]

    Cañizares, Claudio A.

    1 Forecasting the Hourly Ontario Energy Price by Multivariate Adaptive Regression Splines H. In this paper, the MARS technique is applied to forecast the hourly Ontario energy price (HOEP). The MARS models values of the latest pre- dispatch price and demand information, made available by the Ontario

  19. Cloudy Sky Version of Bird's Broadband Hourly Clear Sky Model (Presentation)

    SciTech Connect (OSTI)

    Myers, D.

    2006-08-01T23:59:59.000Z

    Presentation on Bird's Broadband Hourly Clear Sky Model given by NREL's Daryl Myers at SOLAR 2006. The objective of this report is to produce ''all sky'' modeled hourly solar radiation. This is based on observed cloud cover data using a SIMPLE model.

  20. Stairwells are lit 24 hours per day regardless of occupancy. In stairwells

    E-Print Network [OSTI]

    initial cost and publicize availability to lighting designers and contractors · Publicize energy savingsStairwells are lit 24 hours per day regardless of occupancy. In stairwells with high-wattage light fixtures (T12s or T8s), 24-hour use can lead to a significant and unnecessary waste of electricity

  1. Optimization of Multibody Systems using Approximation Concepts

    E-Print Network [OSTI]

    Etman, L.F. Pascal

    UNIVERSITEIT EINDHOVEN Optimization of multibody systems using approximation concepts / Lodewijk Franciscus Pascal Etman. - Eindhoven : Technische Universiteit Eindhoven, 1997. - XVIII, 140 p. - With ref concepts / crashworthiness design / vehicle suspension Druk: Universiteitsdrukkerij TU Eindhoven Support

  2. Hardness of approximation for quantum problems

    E-Print Network [OSTI]

    Sevag Gharibian; Julia Kempe

    2012-09-05T23:59:59.000Z

    The polynomial hierarchy plays a central role in classical complexity theory. Here, we define a quantum generalization of the polynomial hierarchy, and initiate its study. We show that not only are there natural complete problems for the second level of this quantum hierarchy, but that these problems are in fact hard to approximate. Using these techniques, we also obtain hardness of approximation for the class QCMA. Our approach is based on the use of dispersers, and is inspired by the classical results of Umans regarding hardness of approximation for the second level of the classical polynomial hierarchy [Umans, FOCS 1999]. The problems for which we prove hardness of approximation for include, among others, a quantum version of the Succinct Set Cover problem, and a variant of the local Hamiltonian problem with hybrid classical-quantum ground states.

  3. Approximation algorithms for QMA-complete problems

    E-Print Network [OSTI]

    Sevag Gharibian; Julia Kempe

    2011-01-20T23:59:59.000Z

    Approximation algorithms for classical constraint satisfaction problems are one of the main research areas in theoretical computer science. Here we define a natural approximation version of the QMA-complete local Hamiltonian problem and initiate its study. We present two main results. The first shows that a non-trivial approximation ratio can be obtained in the class NP using product states. The second result (which builds on the first one), gives a polynomial time (classical) algorithm providing a similar approximation ratio for dense instances of the problem. The latter result is based on an adaptation of the "exhaustive sampling method" by Arora et al. [J. Comp. Sys. Sci. 58, p.193 (1999)] to the quantum setting, and might be of independent interest.

  4. Optimization Online - An Approximation Algorithm for Constructing ...

    E-Print Network [OSTI]

    Artur Pessoa

    2006-09-02T23:59:59.000Z

    Sep 2, 2006 ... In this paper, we propose an approximation algorithm for the 2-bit Hamming prefix code problem. Our algorithm spends $O(n \\log^3 n)$ time to ...

  5. RESTRICTED-TRACE APPROXIMATION FOR NUCLEAR ANTIFERROMAGNETISM

    E-Print Network [OSTI]

    Boyer, Edmond

    1353 RESTRICTED-TRACE APPROXIMATION FOR NUCLEAR ANTIFERROMAGNETISM M. GOLDMAN and G. SARMA Service to predict several properties of nuclear antiferromagnetic structures : sublattice magnetization of nuclear dipolar magnetic ordering, either antiferromagnetic or ferromagnetic, has been reported

  6. Approximate Bivariate Factorization, a Geometric Andre Galligo

    E-Print Network [OSTI]

    Hoeij, Mark van

    INRIA) Laboratoire de Mathematiques Parc Valrose 06108 Nice cedex 02, France galligo@unice.fr Mark van, Maple Code 1. INTRODUCTION 1.1 Approximate algebra Over the past ten years symbolic-numeric algorithms

  7. Optimization in Geometric Graphs: Complexity and Approximation

    E-Print Network [OSTI]

    Kahruman-Anderoglu, Sera

    2011-02-22T23:59:59.000Z

    We consider several related problems arising in geometric graphs. In particular, we investigate the computational complexity and approximability properties of several optimization problems in unit ball graphs and develop algorithms to find exact...

  8. Polymer state approximations of Schroedinger wave functions

    E-Print Network [OSTI]

    Klaus Fredenhagen; Felix Reszewski

    2006-08-25T23:59:59.000Z

    It is shown how states of a quantum mechanical particle in the Schroedinger representation can be approximated by states in the so-called polymer representation. The result may shed some light on the semiclassical limit of loop quantum gravity.

  9. A fresh look at the adhesion approximation

    E-Print Network [OSTI]

    Thomas Buchert

    1997-11-04T23:59:59.000Z

    I report on a systematic derivation of the phenomenological ``adhesion approximation'' from gravitational instability together with a brief evaluation of the related status of analytical modeling of large-scale structure.

  10. Linear source approximation in CASMO5

    SciTech Connect (OSTI)

    Ferrer, R.; Rhodes, J. [Studsvik Scandpower, Inc., 504 Shoup Ave., Idaho Falls, ID 83402 (United States); Smith, K. [Dept. of Nuclear Science and Engineering, Massachusetts Inst. of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States)

    2012-07-01T23:59:59.000Z

    A Linear Source (LS) approximation has been implemented in the two-dimensional Method of Characteristics (MOC) transport solver in a prototype version of CASMO5. The LS approximation, which relies on the computation of trajectory-based spatial moments over source regions to obtain the linear source expansion coefficients, improves the solution accuracy relative to the 'flat' or constant source approximation. In addition, the LS formulation is capable of treating arbitrarily-shaped source regions and is compatible with standard Coarse-Mesh Finite Difference (CMFD) acceleration. Numerical tests presented in this paper for the C5G7 MOX benchmark show that, for comparable accuracy with respect to the reference solution, the LS approximation can reduce the run time by a factor of four and the memory requirements by a factor often relative to the FS scheme. (authors)

  11. Approximate inference in Gaussian graphical models

    E-Print Network [OSTI]

    Malioutov, Dmitry M., 1981-

    2008-01-01T23:59:59.000Z

    The focus of this thesis is approximate inference in Gaussian graphical models. A graphical model is a family of probability distributions in which the structure of interactions among the random variables is captured by a ...

  12. Harmonic Wavelet Transform and Image Approximation

    E-Print Network [OSTI]

    Zhang, Zhihua; Saito, Naoki

    2010-01-01T23:59:59.000Z

    DOI 10.1007/s10851-010-0202-x Harmonic Wavelet Transform andwe approximate f by a harmonic function u such that thebanks. We call this the Harmonic Wavelet Transform (HWT).

  13. Transient queueing approximations for computer networks

    E-Print Network [OSTI]

    Baker, William A.

    1986-01-01T23:59:59.000Z

    for just the mean. Rothkopf/Oren's and Chang/Wang's methods obtained mean and variance values, and Clark's method produced several quantities which were used to find mean and variance statistics. For the M/M/1 case, the approximations by Gark and Chang... were very ac- curate over a wide range of input patterns and initial conditions. Rothkopf's was accurate over sll conditions but never as accurate as Chang or Clark. Johnston's and Rider's approximations performed acceptably only over some...

  14. Approximate Killing Fields as an Eigenvalue Problem

    E-Print Network [OSTI]

    Christopher Beetle

    2008-08-12T23:59:59.000Z

    Approximate Killing vector fields are expected to help define physically meaningful spins for non-symmetric black holes in general relativity. However, it is not obvious how such fields should be defined geometrically. This paper relates a definition suggested recently by Cook and Whiting to an older proposal by Matzner, which seems to have been overlooked in the recent literature. It also describes how to calculate approximate Killing fields based on these proposals using an efficient scheme that could be of immediate practical use in numerical relativity.

  15. Extending the Eikonal Approximation to Low Energy

    E-Print Network [OSTI]

    Pierre Capel; Tokuro Fukui; Kazuyuki Ogata

    2014-11-21T23:59:59.000Z

    E-CDCC and DEA, two eikonal-based reaction models are compared to CDCC at low energy (e.g. 20AMeV) to study their behaviour in the regime at which the eikonal approximation is supposed to fail. We confirm that these models lack the Coulomb deflection of the projectile by the target. We show that a hybrid model, built on the CDCC framework at low angular momenta and the eikonal approximation at larger angular momenta gives a perfect agreement with CDCC. An empirical shift in impact parameter can also be used reliably to simulate this missing Coulomb deflection.

  16. Realizing Physical Approximation of the Partial Transpose

    E-Print Network [OSTI]

    Hyang-Tag Lim; Yong-Su Kim; Young-Sik Ra; Joonwoo Bae; Yoon-Ho Kim

    2011-04-18T23:59:59.000Z

    The partial transpose by which a subsystem's quantum state is solely transposed is of unique importance in quantum information processing from both fundamental and practical point of view. In this work, we present a practical scheme to realize a physical approximation to the partial transpose using local measurements on individual quantum systems and classical communication. We then report its linear optical realization and show that the scheme works with no dependence on local basis of given quantum states. A proof-of-principle demonstration of entanglement detection using the physical approximation of the partial transpose is also reported.

  17. Approximate initial data for binary black holes

    E-Print Network [OSTI]

    Kenneth A. Dennison; Thomas W. Baumgarte; Harald P. Pfeiffer

    2006-08-26T23:59:59.000Z

    We construct approximate analytical solutions to the constraint equations of general relativity for binary black holes of arbitrary mass ratio in quasicircular orbit. We adopt the puncture method to solve the constraint equations in the transverse-traceless decomposition and consider perturbations of Schwarzschild black holes caused by boosts and the presence of a binary companion. A superposition of these two perturbations then yields approximate, but fully analytic binary black hole initial data that are accurate to first order in the inverse of the binary separation and the square of the black holes' momenta.

  18. The design and construction of an infrared detector for use with a highway traffic survey system

    E-Print Network [OSTI]

    Mundkowsky, William Fredrick

    1961-01-01T23:59:59.000Z

    during daylight hours. The noise level did not increase. This indicates that the preamplifier's noise is so large that the background noise could not be distinguished. Using the detector's maximus responsivity, the background spectral radiance, and... reduced by approximately one- half during driving conditions as compared to the exhaust temperature when the autanoblle was parked. with the motor running. Exhaust Gas 500 400 Muffler Exhaust Pipe 300 0 10 20 30 40 50 60 70 80 Speed (miles/hour...

  19. Y-12 Construction hits one million-hour mark without a lost-time...

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

    Construction hits one ... Y-12 Construction hits one million-hour mark without a lost-time accident Posted: August 30, 2012 - 5:30pm The B&W Y-12 Direct-Hire Construction team has...

  20. E-Print Network 3.0 - amp-hour counting control Sample Search...

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

    Summary: amp- hour, 12 volt battery. The ORADS is also equipped with a 12-watt, 12 volt solar panel attached... ) sensor that measures lane position and passage of vehicle tires...

  1. Validation of a group 24-hour recall method for dietary assessment

    E-Print Network [OSTI]

    Scott, Amanda Renee

    2002-01-01T23:59:59.000Z

    A group 24-hour recall method developed by the Expanded Food and Nutrition Education Program of Texas was validated in a population of low-income female food service workers using unobtrusive meal observation as a validation standard. All subjects...

  2. Calibration of Predicted Hourly Zone-Level Supply Air Flows with Measurements

    E-Print Network [OSTI]

    Mihai, A.; Zmeureanu, R.

    2013-01-01T23:59:59.000Z

    and Saturday instead, but only after February 28th. h) Initially, the predictions presented a one hour lag compared to the measurements; after investigations, it was discovered that the measurements do not take into consideration the daylight savings...

  3. Question of the Week: How Are You Observing Earth Hour? | Department...

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

    Sunday, people across the country will spring forward an hour, marking the start to Daylight Saving Time. | Photo courtesy of iStock Photo, WoodyUpstate. Top 8 Things You Didn't...

  4. Is the hourly data I get from NREL's PV Watts program adjusted...

    Open Energy Info (EERE)

    get from NREL's PV Watts program adjusted for daylight savings time. Home I take the hourly AC output numbers and apply them to a program I built that assigns a dollar value to the...

  5. EPA ENERGY STAR Webcast- Portfolio Manager® Office Hours, Focus Topic: Portfolio Manager 2015 Priorities

    Broader source: Energy.gov [DOE]

    Portfolio Manager "Office Hours" is a live webinar that gives all users an opportunity to ask their questions directly to EPA in an open forum. We will plan to spend the first 20-30 minutes of each...

  6. ANTH 376: GENOMICS & ANTHROPOLOGY 4 credit hours (satisfies an SC requirement)

    E-Print Network [OSTI]

    1 ANTH 376: GENOMICS & ANTHROPOLOGY 4 credit hours (satisfies an SC variation, health and evolution. Extended Course Description The Human Genome Project and recent advances in genome sequencing techniques have made it possible

  7. Building Technologies Program: Tax Deduction Qualified Software- Hourly Analysis Program (HAP) version 4.50

    Broader source: Energy.gov [DOE]

    Provides required documentation that Hourly Analysis Program (HAP) version 4.50 meets Internal Revenue Code §179D, Notice 2006-52, dated June 2, 2006, for calculating commercial building energy and power cost savings.

  8. MAST/GEOG 667: Wind Power Meteorology Fall 2013, 3 credit hours

    E-Print Network [OSTI]

    Delaware, University of

    to understand onshore, offshore, and airborne wind power. Topics include: forces affecting-level winds: Pressure Gradient Force and Coriolis (pressure surfaces, geostrophic flowMAST/GEOG 667: Wind Power Meteorology Fall 2013, 3 credit hours 1

  9. LBNL-53729-Revised After-hours Power Status of Office Equipment and

    E-Print Network [OSTI]

    LBNL-53729-Revised After-hours Power Status of Office Equipment and Energy Use of Miscellaneous of Energy under Contract No. DE-AC03-76SF00098. #12;LBNL-53729-Revised i Table of Contents Table of Contents

  10. Building Technologies Program: Tax Deduction Qualified Software- Hourly Analysis Program (HAP) version 4.41

    Broader source: Energy.gov [DOE]

    Provides required documentation that Hourly Analysis Program (HAP) version 4.41 meets Internal Revenue Code §179D, Notice 2006-52, dated April 10, 2009, for calculating commercial building energy and power cost savings.

  11. Calculating Your GPA Grade point value per credit hour is assigned as follows

    E-Print Network [OSTI]

    Divide total quality points (calculated from step 1) by total credit hours earned For Example Finding GPA.8 Totals 20 64.0 GPA= Total Quality Points Total Credit Hours = 64 3.2 20 = GPA= 3.2 *All marks of P, P*, N 101 4 ECON 201 4 ECON 202 4 ACTG 211 4 ACTG 213 4 Totals 20 GPA= Total Quality Points Total Credit

  12. Computer Code Gives Astrophysicists First Full Simulation of Star's Final Hours

    ScienceCinema (OSTI)

    Andy Nonaka

    2010-01-08T23:59:59.000Z

    The precise conditions inside a white dwarf star in the hours leading up to its explosive end as a Type Ia supernova are one of the mysteries confronting astrophysicists studying these massive stellar explosions. But now, a team of researchers, composed of three applied mathematicians at the U.S. Department of Energy's (DOE) Lawrence Berkeley National Laboratory and two astrophysicists, has created the first full-star simulation of the hours preceding the largest thermonuclear explosions in the universe.

  13. Museum Hours

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your1 SECTIONES2008-54174MoreMuseum Day at Bradbury

  14. Blind Channel Equalization and -Approximation Algorithms

    E-Print Network [OSTI]

    Ye, Yinyu

    Blind Channel Equalization and #15;-Approximation Algorithms #3; Qingyu Li 1 , Er-Wei Bai 1 University of Iowa Iowa City, IA 52242 Abstract In this paper, we show that a blind equalizer can be obtained without using any sta- tistical information on the input by formulating the blind channel equalization

  15. FRACTAL APPROXIMATION AND COMPRESSION USING PROJECTED IFS

    E-Print Network [OSTI]

    Baskurt, Atilla

    FRACTAL APPROXIMATION AND COMPRESSION USING PROJECTED IFS �ric Guérin, �ric Tosan and Atilla, or images) with fractal models is an important center of interest for research. The general inverse problem.The most known of them is the fractal image compression method introduced by Jacquin. Generally speaking

  16. Approximate Inference and Protein-Folding

    E-Print Network [OSTI]

    Weiss, Yair

    Approximate Inference and Protein-Folding Chen Yanover and Yair Weiss School of Computer Science Side-chain prediction is an important subtask in the protein-folding problem. We show that #12;nding algorithms, including a widely used protein-folding software (SCWRL). 1 Introduction Inference in graphical

  17. APPROXIMATION ALGORITHMS FOR SCHEDULING a dissertation

    E-Print Network [OSTI]

    Chekuri, Chandra

    Approved for the University Committee on Graduate Studies: iii #12; iv #12; Abstract This thesis describes instance of the problem, returns a solution whose value is within some guaranteed multiplicative factor ff release dates only we obtain an e e\\Gamma1 ' 1:58 approximation. For the parallel machine case we obtain

  18. Polynomial Approximations for Continuous Linear Programs

    E-Print Network [OSTI]

    2012-04-05T23:59:59.000Z

    where the cost rate c(t), the right hand side vector b(t) as well as the matrices. G(t) and H(t, ... dual approximations, respectively, estimates the degree of suboptimality of the ...... the matrix of capital coefficients, where Bij defines the stock of good i required per unit of ...... In Optimization methods for resource allocation (Proc.

  19. Symbolic Test Selection Based on Approximate Analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Symbolic Test Selection Based on Approximate Analysis Bertrand Jeannet, Thierry J´eron, Vlad Rusu}@irisa.fr Abstract. This paper addresses the problem of generating symbolic test cases for testing the conformance. The challenge we consider is the selection of test cases according to a test purpose, which is here a set

  20. Approximating Power Indices --Theoretical and Empirical Analysis

    E-Print Network [OSTI]

    Rosenschein, Jeff

    , by providing lower bounds for both deter- ministic and randomized algorithms for calculating power indices. WeApproximating Power Indices -- Theoretical and Empirical Analysis Yoram Bachrach School and Computer Science, The Hebrew University, Jerusalem, Israel Amin Saberi Department of Management Science

  1. Kirchhoff approximation for diffusive waves Jorge Ripoll*

    E-Print Network [OSTI]

    Lorenzo, Jorge Ripoll

    Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, Ecole Centrale Paris, Centre National de for accurately solving the direct scattering problem 17,18,23 for arbitrary geometries, but these methods,26 . This approximation is a linear method that does not involve matrix inversion while solving the forward problem

  2. IMPROVING THE APPROXIMATION AND CONVERGENCE CAPABILITIES OF

    E-Print Network [OSTI]

    Yeung, Dit-Yan

    ­dimensional data. Projection pursuit learning (PPL) formulates PPR in a neural network framework. One major difference between PPR and PPL is that the smoothers in PPR are nonparametric, whereas those in PPL are based known, we demonstrate that PPL networks do not have the universal approximation and strong convergence

  3. Approximating Human Reaching Volumes Using Inverse Kinematics

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    of reach: standing reach, which is useful in computer animation where virtual humans have to interact. Introduction Virtual Humans are a valuable medium for gaining knowledge and understanding about the human bodyApproximating Human Reaching Volumes Using Inverse Kinematics I. Rodrígueza , M. Peinadoa , R

  4. Relationships among Perceived Working Hours, General Stress, Work Centrality, Job Control, Job Demands, and Work Condition Constraints

    E-Print Network [OSTI]

    Kim, Se Hoon

    2014-06-27T23:59:59.000Z

    Although working hours are generally regarded as a major indicator of stress, little exploration has been done about how working hours influence stress with the relevant individual and job characteristics. The purpose of this study was to examine...

  5. Orthogonal Polynomial Approximation in Higher Dimensions: Applications in Astrodynamics

    E-Print Network [OSTI]

    Bani Younes, Ahmad H.

    2013-08-05T23:59:59.000Z

    harmonic series by a family of locally precise orthogonal polynomial approximations for efficient computation. A method is introduced which adapts the approximation degree radially, compatible with the truth that the highest degree approximations (to...

  6. VISCOSITY AND RELAXATION APPROXIMATIONS FOR HYPERBOLIC SYSTEMS OF CONSERVATION LAWS

    E-Print Network [OSTI]

    Tzavaras, Athanasios E.

    VISCOSITY AND RELAXATION APPROXIMATIONS FOR HYPERBOLIC SYSTEMS deal with the approximation of conservation * *laws via viscosity or relaxation. The following topics are covered: The general structure of viscosity and relaxation approximations is discu

  7. A numerical approximation to distribution function

    E-Print Network [OSTI]

    Tuttle, Keith Allan

    1977-01-01T23:59:59.000Z

    then is to approximate F(Y) numerically. We sub- divide the unit cube Q into N cubes eqch of length h I/N on a n n side. Within each individual subcube Q , we will define an affine approximation to f, W = g(x , . . . , x ), which requires the gradient of 1' ' 'n our... & h/2, k k i + 1/2 2 n k k = 1, 2, . . . , n]. Let f(x) f C [Q ] the space of twice continuously n differentiable functions on Q , and define the auxiliary function g(x) as the tangent to f at x. i + 1 2 for x f Q. . That is, if x I Q i (x) f (x1 2...

  8. Compressed Indexes for Approximate String Matching

    E-Print Network [OSTI]

    Sung, Wing-Kin Ken"

    Compressed Indexes for Approximate String Matching Ho-Leung Chan1 Tak-Wah Lam1, Wing-Kin Sung2 Siu the index space to O(n log n). Huynh et al. [10] and Lam et al. [11] further compressed the index to O,wongss}@comp.nus.edu.sg Abstract. We revisit the problem of indexing a string S[1..n] to support searching all substrings

  9. Approximating spheroid inductive responses using spheres

    SciTech Connect (OSTI)

    Smith, J. Torquil; Morrison, H. Frank

    2003-12-12T23:59:59.000Z

    The response of high permeability ({mu}{sub r} {ge} 50) conductive spheroids of moderate aspect ratios (0.25 to 4) to excitation by uniform magnetic fields in the axial or transverse directions is approximated by the response of spheres of appropriate diameters, of the same conductivity and permeability, with magnitude rescaled based on the differing volumes, D.C. magnetizations, and high frequency limit responses of the spheres and modeled spheroids.

  10. BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS

    E-Print Network [OSTI]

    BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS Running title: BLOCKĆciently small as to preclude the loss of positive de#12;niteness in the approximate equations. Therefore

  11. BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS

    E-Print Network [OSTI]

    BLOCK DIAGONALLY DOMINANT POSITIVE DEFINITE APPROXIMATE FILTERS AND SMOOTHERS Running title: BLOCK the loss of positive definiteness in the approximate equations. Therefore previous analyses have

  12. Verified integrity properties for safe approximate program transformations

    E-Print Network [OSTI]

    Kim, Deokhwan

    Approximate computations (for example, video, audio, and image processing, machine learning, and many scientific computations) have the freedom to generate a range of acceptable results. Approximate program transformations ...

  13. Statistical correlation between hourly and daily values of solar radiation on horizontal surface at sea level in the Italian climate

    E-Print Network [OSTI]

    Boyer, Edmond

    219- Statistical correlation between hourly and daily values of solar radiation on horizontal- nalières du rayonnement solaire. Abstract. 2014 The knowledge of hourly data of solar radiation is required data measured in Italian stations and propose a method to estimate hourly solar radiation

  14. Sub-Hour Solar Data for Power System Modeling From Static Spatial Variability Analysis: Preprint

    SciTech Connect (OSTI)

    Hummon, M.; Ibanez, E.; Brinkman, G.; Lew, D.

    2012-12-01T23:59:59.000Z

    High penetration renewable integration studies need high quality solar power data with spatial-temporal correlations that are representative of a real system. This paper will summarize the research relating sequential point-source sub-hour global horizontal irradiance (GHI) values to static, spatially distributed GHI values. This research led to the development of an algorithm for generating coherent sub-hour datasets that span distances ranging from 10 km to 4,000 km. The algorithm, in brief, generates synthetic GHI values at an interval of one-minute, for a specific location, using SUNY/Clean Power Research, satellite-derived, hourly irradiance values for the nearest grid cell to that location and grid cells within 40 km.

  15. Numerical simulation of hourly temperatures at Webb Air Force Base, Texas

    E-Print Network [OSTI]

    Hansen, James Edward

    1975-01-01T23:59:59.000Z

    , with time of year, of the autocorrelation coefficient, and a first-order kharkov chain. Fourier (harmonic) analysis was used extensively in the development of the model and the reverse adjusted normal transformation was used to transform a normal... for by the 1st, 365th, 730th, and 1095th barmonics, 17 Vai~ es of the parameters used to generate the mean hourly temperature. Percent of the variance of the standard devia- tion of hourly temperature, accounted for by the 1st and 36th harmonics. 24...

  16. Computer Code Gives Astrophysicists First Full Simulation of Star's Final Hours

    ScienceCinema (OSTI)

    Applin, Bradford

    2013-05-29T23:59:59.000Z

    The precise conditions inside a white dwarf star in the hours leading up to its explosive end as a Type Ia supernova are one of the mysteries confronting astrophysicists studying these massive stellar explosions. But now, a team of researchers, composed of three applied mathematicians at the U.S. Department of Energy's (DOE) Lawrence Berkeley National Laboratory and two astrophysicists, has created the first full-star simulation of the hours preceding the largest thermonuclear explosions in the universe. http://www.lbl.gov/cs/Archive/news091509.html

  17. Relativistic Random Phase Approximation At Finite Temperature

    SciTech Connect (OSTI)

    Niu, Y. F. [State Key Laboratory for Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China); Physics Department, Faculty of Science, University of Zagreb (Croatia); Paar, N.; Vretenar, D. [Physics Department, Faculty of Science, University of Zagreb (Croatia); Meng, J. [State Key Laboratory for Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China)

    2009-08-26T23:59:59.000Z

    The fully self-consistent finite temperature relativistic random phase approximation (FTRRPA) has been established in the single-nucleon basis of the temperature dependent Dirac-Hartree model (FTDH) based on effective Lagrangian with density dependent meson-nucleon couplings. Illustrative calculations in the FTRRPA framework show the evolution of multipole responses of {sup 132}Sn with temperature. With increased temperature, in both monopole and dipole strength distributions additional transitions appear in the low energy region due to the new opened particle-particle and hole-hole transition channels.

  18. Entangled games are hard to approximate

    E-Print Network [OSTI]

    Julia Kempe; Hirotada Kobayashi; Keiji Matsumoto; Ben Toner; Thomas Vidick

    2007-11-21T23:59:59.000Z

    We establish the first hardness results for the problem of computing the value of one-round games played by a verifier and a team of provers who can share quantum entanglement. In particular, we show that it is NP-hard to approximate within an inverse polynomial the value of a one-round game with (i) quantum verifier and two entangled provers or (ii) classical verifier and three entangled provers. Previously it was not even known if computing the value exactly is NP-hard. We also describe a mathematical conjecture, which, if true, would imply hardness of approximation to within a constant. We start our proof by describing two ways to modify classical multi-prover games to make them resistant to entangled provers. We then show that a strategy for the modified game that uses entanglement can be ``rounded'' to one that does not. The results then follow from classical inapproximability bounds. Our work implies that, unless P=NP, the values of entangled-prover games cannot be computed by semidefinite programs that are polynomial in the size of the verifier's system, a method that has been successful for more restricted quantum games.

  19. Analytic approximate radiation effects due to Bremsstrahlung

    SciTech Connect (OSTI)

    Ben-Zvi I.

    2012-02-01T23:59:59.000Z

    The purpose of this note is to provide analytic approximate expressions that can provide quick estimates of the various effects of the Bremsstrahlung radiation produced relatively low energy electrons, such as the dumping of the beam into the beam stop at the ERL or field emission in superconducting cavities. The purpose of this work is not to replace a dependable calculation or, better yet, a measurement under real conditions, but to provide a quick but approximate estimate for guidance purposes only. These effects include dose to personnel, ozone generation in the air volume exposed to the radiation, hydrogen generation in the beam dump water cooling system and radiation damage to near-by magnets. These expressions can be used for other purposes, but one should note that the electron beam energy range is limited. In these calculations the good range is from about 0.5 MeV to 10 MeV. To help in the application of this note, calculations are presented as a worked out example for the beam dump of the R&D Energy Recovery Linac.

  20. Doctoral Program in Finance: Curriculum Fall FIN 7935 Finance Research Forum (1 credit hour)

    E-Print Network [OSTI]

    Foroosh, Hassan

    Doctoral Program in Finance: Curriculum First Year Fall FIN 7935 Finance Research Forum (1 credit of Finance Spring FIN 7935 Finance Research Forum (1 credit hour) ECO 6424 Econometrics I ECO 7116 Microeconomic Theory II FIN 7807 Seminar in Corporate Finance Attend FCTL Teaching Workshop for Doctoral

  1. Changes in the fatty acid composition of goat milk fat after a 48-hour fast

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    milking was analysed. A total of 10 samples was taken from each goat and cooled. Milk samples 1-6 wereChanges in the fatty acid composition of goat milk fat after a 48-hour fast Anne-Marie MASSART, B-9000 Ghent, Belgium. Summary. Five lactating goats were milked twice daily. After a control period

  2. 0 3 6 9 12 15 18 21 24 27 Fermentation (hours)

    E-Print Network [OSTI]

    Strynadka, Natalie

    0 3 6 9 12 15 18 21 24 27 Fermentation (hours) rpm Do Wet cell weight (g/L) Feed Rate (ml/L) Expon. (Wet cell weight (g/L)) Figure 2. Fermentation profile of a Fed-Batch conducted in the CBR Fermentation, succinate, propionate isobutyrate , and acetate by gas chromatography. They can be removed from the media

  3. Addresses and business hours of Rabobank Eindhoven-Veldhoven Branch Witte Dame (Emmasingel 4), Eindhoven

    E-Print Network [OSTI]

    Franssen, Michael

    Addresses and business hours of Rabobank Eindhoven-Veldhoven Branch Witte Dame (Emmasingel 4), Eindhoven Monday: 12.00 ­ 17.00 hrs Tuesday till Thursday: 09.30 ­ 17.00 hrs Friday: 09.30 ­ 18.00 hrs Saturday 10.00 ­ 13.00 hrs Branch Winkelcentrum Woensel 400, Eindhoven Monday: 12.00 ­ 17.00 hrs Tuesday

  4. Hourly Temperature Forecasting Using Abductive Networks R. E. Abdel-Aal

    E-Print Network [OSTI]

    Abdel-Aal, Radwan E.

    ANNGSF) and for forecasting the one-hour-ahead heat load for a district heat load network (Seppälä et al and network analysis functions in power utilities. Since high-low temperature forecasts are usually provided-Rohani & Maratukulam, 1998). In other agricultural and environmental applications, even high-low temperature forecasts

  5. Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation

    E-Print Network [OSTI]

    Shihada, Basem

    Avoiding the Rush Hours: WiFi Energy Management via Traffic Isolation Justin Manweiler Duke.rc@duke.edu ABSTRACT WiFi continues to be a prime source of energy consumption in mobile devices. This paper observes that, despite a rich body of research in WiFi energy management, there is room for improvement. Our key

  6. DEPARTMENT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE Instructions for Completing the Master's Project (0 Credit Hours)

    E-Print Network [OSTI]

    Mather, Patrick T.

    , students must submit their signed Master's Project to the Graduate Records Office by the graduation date. The Graduate School is notified that the student has fulfilled the Master's Project requirement when's Project (0 Credit Hours) All students not electing to submit a thesis for the master's degree in Computer

  7. Graduation (research) project procedures -After the student completes 100 credit hours he may register for the

    E-Print Network [OSTI]

    Graduation (research) project procedures - After the student completes 100 credit hours he may register for the graduation project module, and after registering this module and obtaining the approval a form particular to the proposed graduation project (form No. 23/a), whereby three proposed titles

  8. ECE 3302: Fundamentals of Electrical Engineering Credit / Contact hours: 3 / 3

    E-Print Network [OSTI]

    Gelfond, Michael

    ECE 3302: Fundamentals of Electrical Engineering Credit / Contact hours: 3 / 3 Course coordinator: Mary Baker Textbook(s) and/or other required material: Alexander and Sadiku, Fundamentals of Electric Circuits, 4th Edition, McGraw Gill, 2009. Catalog description: Principles of electric circuits. DC

  9. COLLEGE OF LIBERAL ARTS 15 Hours SPANISH MINOR (M)SPNS

    E-Print Network [OSTI]

    Kihara, Daisuke

    COLLEGE OF LIBERAL ARTS 15 Hours SPANISH MINOR (M)SPNS Before undertaking this minor, the student must establish proficiency equivalent to Spanish Level IV. Proficiency may be established by taking and passing SPAN 20200, by examination, or by other evidence acceptable to the Department. Spanish minors must

  10. Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago

    E-Print Network [OSTI]

    Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago Representatives of more than 30 countries signed a deal on Tuesday to build the world's most advanced nuclear fusion reactor nuclear reactors, but critics argue it could be at least 50 years before a commercially viable reactor

  11. Mongolian Nomads and Climate Change Happy Hour with Dr. Clyde Goulden

    E-Print Network [OSTI]

    Schladow, S. Geoffrey

    Mongolian Nomads and Climate Change Happy Hour with Dr. Clyde Goulden Date: Friday, December 8 by the World Bank to study the impacts of nomadic pastoralism and climate change on the Hovsgol watershed," published by Backhuys Publ., with 28 chapters by scientists from Mongolia, Russia, Japan, the United States

  12. PRE-DENTAL HYGIENE Undergraduate Credit Required: 66 hours undergraduate course work

    E-Print Network [OSTI]

    Logan, David

    PRE-DENTAL HYGIENE Undergraduate Credit Required: 66 hours undergraduate course work Entrance Exam: None Professional Schooling Required: 2 years dental hygiene school; B.S. Dental Hygiene Local The following are entrance requirements for UNMC's Dental Hygiene program. Students who are considering other

  13. (Please type of print and return with Application for Admission) Verification of Employment Hours

    E-Print Network [OSTI]

    (Please type of print and return with Application for Admission) Verification of Employment Hours to distribute to all employers of the last five years. Section 1: TO BE COMPLETED BY THE APPLICANT AND SENT TO THE EMPLOYER. PLEASE PRINT. Surname:_________________________________ Given Name

  14. CLINICAL VOLUNTEER PROGRAMS Children's Hospital of Orange County/ commitment = 100 hours

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    CLINICAL VOLUNTEER PROGRAMS Children's Hospital of Orange County/ commitment = 100 hours 455 S Hospital Clinical Care Extender Program/ACCEPTING APPLICATIONS NOW INTERVIEWING THROUGH MARCH 26TH 1 Hoag-4 departments Telephone 949 764-5740 Applications every three months http://www.hoag.org/volunteering/clinical

  15. Quantification of Variability and Uncertainty in Hourly NOx Emissions from Coal-Fired Power Plants

    E-Print Network [OSTI]

    Frey, H. Christopher

    to quantify variability and uncertainty for NOx emissions from coal-fired power plants. Data for hourly NOx Uncertainty, Variability, Emission Factors, Coal-Fired Power Plants, NOx emissions, Regression Models for different source categories, NOx emissions from coal-fired power plants are analyzed in this #12;2 paper

  16. Library hours vary by semester; Check lib.usf.edu After midnight, USF ID required

    E-Print Network [OSTI]

    Meyers, Steven D.

    Library hours vary by semester; Check lib.usf.edu After midnight, USF ID required lib.usf.edu (813? To learn how to: Integrate the library into Canvas, Invite a librarian to join your course's Canvas site, or Request a tailored research guide or library research assignment, Contact: Susan Silver | ssilver

  17. Short Term Hourly Load Forecasting Using Abductive Networks R. E. Abdel-Aal

    E-Print Network [OSTI]

    Abdel-Aal, Radwan E.

    Physical Sciences, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, Saudi for forecasting next-day hourly loads have been developed. Evaluated on data for the 6th year, the models give. INTRODUCTION Accurate load forecasting is a key requirement for the planning and economic and secure operation

  18. From the Big Bang to the Higgs Boson in Less Than an Hour

    E-Print Network [OSTI]

    Fygenson, Deborah Kuchnir

    From the Big Bang to the Higgs Boson in Less Than an Hour Jeffrey D H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum expectation value Strong) photon Z boson W bosons H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum

  19. From the Big Bang to the Higgs Boson in Less Than an Hour

    E-Print Network [OSTI]

    Fygenson, Deborah Kuchnir

    From the Big Bang to the Higgs Boson in Less Than an Hour Jeffrey D neutrino Z0 W + W -g gluon (8) photon Z boson W bosons Quarks Leptons H Higgs boson Gauge bosons (force field quanta) Higgs boson and vacuum expectation value Strong force EM force Weak force #12;Par7cles

  20. Daily Texan April 1, 2014 Keeping Tower dark for Earth Hour was

    E-Print Network [OSTI]

    John, Lizy Kurian

    of the University's Energy and Water Conservation program, said the Tower going dark was a gesture similarDaily Texan April 1, 2014 Keeping Tower dark for Earth Hour was intended to raise awareness British thermal units, of natural gas. According to the University's Utilities and Energy Management

  1. Impact of realistic hourly emissions profiles on air pollutants concentrations modelled with CHIMERE

    E-Print Network [OSTI]

    Menut, Laurent

    Impact of realistic hourly emissions profiles on air pollutants concentrations modelled Keywords: Atmospheric composition European air quality Anthropogenic emissions a b s t r a c t Regional inputs data like anthropogenic surface emissions of NOx, VOCs and particulate matter. These emissions

  2. WARMING TRENDS IN THE TAHOE HAPPY HOUR WITH ROBERT COATS, PH.D.

    E-Print Network [OSTI]

    Schladow, S. Geoffrey

    to the causes of global warming lie at the national and international level, addressing the consequencesWARMING TRENDS IN THE TAHOE BASIN HAPPY HOUR WITH ROBERT COATS, PH.D. (HYDROIKOS LTD.) Date scientists agree that the earth's atmosphere and oceans are warming and the consequences will fall somewhere

  3. 24-hours ahead global irradiation forecasting using Multi-Layer Cyril Voyant1*

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ; it is shown that the most relevant is based on a multi- output MLP using endogenous and exogenous input data ahead. In the case of solar plants, the driving factor is the global solar irradiation (sum of direct and diffuse solar radiation projected on a plane (Wh/m˛)). This paper focuses on the 24-hours ahead forecast

  4. SCHOOL OF MATHEMATICS AND STATISTICS Spring Semester 20072008 OPERATIONS RESEARCH 2 hours

    E-Print Network [OSTI]

    four will be counted. 1 (i) A company owns a steam turbine power generating plant that generates its steam from coal. It wishes to maximise the steam output. This, however, may result in emission that does per hour. The plant receives two grades of pul- verised coal, C1 and C2, for use in the steam plant

  5. Date of Accident: _____/_____/________ Day of Week: __________________ Hour: _____:______ AM / PM TIME VEHICLE ACCIDENT REPORT

    E-Print Network [OSTI]

    Farritor, Shane

    Page 1/2 Date of Accident: _____/_____/________ Day of Week: __________________ Hour: _____:______ AM / PM TIME VEHICLE ACCIDENT REPORT TO BE USED BY ALL STATE AGENCIES to make immediate report of all motor vehicle accidents involving State employees, vehicles, equipment or where highways could result

  6. MATH 121 HOUR TEST I September 25,1996 Name (print) _________________________________________

    E-Print Network [OSTI]

    Baldwin, John T.

    of the tower. 3. (15 points) A flywheel is turning at the rate of 1500 revolutions per second of the flywheel? Give an approximate decimal answer in feet, accurate to 3 decimal places. 4. (20 points

  7. VISCOSITY AND RELAXATION APPROXIMATIONS FOR HYPERBOLIC SYSTEMS OF CONSERVATION LAWS

    E-Print Network [OSTI]

    Tzavaras, Athanasios E.

    VISCOSITY AND RELAXATION APPROXIMATIONS FOR HYPERBOLIC SYSTEMS OF CONSERVATION LAWS Athanasios E. Tzavaras Abstract. These lecture notes deal with the approximation of conservation laws via viscosity or relaxation. The following topics are covered: The general structure of viscosity and relaxation

  8. Reliability analysis of solar photovoltaic system using hourly mean solar radiation data

    SciTech Connect (OSTI)

    Moharil, Ravindra M. [Department of Electrical Engineering, Yeshwantrao Chavan College of Engineering, Nagpur, Maharashtra (India); Kulkarni, Prakash S. [Department of Electrical Engineering, Visvesvaraya National Institute of Technology, South Ambazari Road, Nagpur 440011, Maharashtra (India)

    2010-04-15T23:59:59.000Z

    This paper presents the hourly mean solar radiation and standard deviation as inputs to simulate the solar radiation over a year. Monte Carlo simulation (MCS) technique is applied and MATLAB program is developed for reliability analysis of small isolated power system using solar photovoltaic (SPV). This paper is distributed in two parts. Firstly various solar radiation prediction methods along with hourly mean solar radiation (HMSR) method are compared. The comparison is carried on the basis of predicted electrical power generation with actual power generated by SPV system. Estimation of solar photovoltaic power using HMSR method is close to the actual power generated by SPV system. The deviation in monsoon months is due to the cloud cover. In later part of the paper various reliability indices are obtained by HMSR method using MCS technique. Load model used is IEEE-RTS. Reliability indices, additional load hours (ALH) and additional power (AP) reduces exponentially with increase in load indicates that a SPV source will offset maximum fuel when all of its generated energy is utilized. Fuel saving calculation is also investigated. Case studies are presented for Sagardeep Island in West Bengal state of India. (author)

  9. Adaptive approximation of higher order posterior statistics

    SciTech Connect (OSTI)

    Lee, Wonjung, E-mail: leew@maths.ox.ac.uk

    2014-02-01T23:59:59.000Z

    Filtering is an approach for incorporating observed data into time-evolving systems. Instead of a family of Dirac delta masses that is widely used in Monte Carlo methods, we here use the Wiener chaos expansion for the parametrization of the conditioned probability distribution to solve the nonlinear filtering problem. The Wiener chaos expansion is not the best method for uncertainty propagation without observations. Nevertheless, the projection of the system variables in a fixed polynomial basis spanning the probability space might be a competitive representation in the presence of relatively frequent observations because the Wiener chaos approach not only leads to an accurate and efficient prediction for short time uncertainty quantification, but it also allows to apply several data assimilation methods that can be used to yield a better approximate filtering solution. The aim of the present paper is to investigate this hypothesis. We answer in the affirmative for the (stochastic) Lorenz-63 system based on numerical simulations in which the uncertainty quantification method and the data assimilation method are adaptively selected by whether the dynamics is driven by Brownian motion and the near-Gaussianity of the measure to be updated, respectively.

  10. Regular Type III and Type N Approximate Solutions

    E-Print Network [OSTI]

    Philip Downes; Paul MacAllevey; Bogdan Nita; Ivor Robinson

    2001-05-18T23:59:59.000Z

    New type III and type N approximate solutions which are regular in the linear approximation are shown to exist. For that, we use complex transformations on self-dual Robinson-Trautman metrics rather then the classical approach. The regularity criterion is the boundedness and vanishing at infinity of a scalar obtained by saturating the Bel-Robinson tensor of the first approximation by a time-like vector which is constant with respect to the zeroth approximation.

  11. Optimization Online - Approximation of rank function and its ...

    E-Print Network [OSTI]

    shujun Bi

    2011-07-10T23:59:59.000Z

    Jul 10, 2011 ... Particularly, with two families of approximation functions, we ... Citation: Department of Mathematics, South China University of Technology, ...

  12. Approximate Dynamic Programming for a Class of Long-Horizon ...

    E-Print Network [OSTI]

    2014-04-06T23:59:59.000Z

    require hours to produce good solutions even when the planning horizon is 90 ... Surveys of general IRPs for all modes of transportation are given in [1] and [9]. .... Dynamic fleet management problems are a special case in this problem class.

  13. BUILDING SURROGATE MODELS BASED ON DETAILED AND APPROXIMATE SIMULATIONS

    E-Print Network [OSTI]

    Seepersad, Carolyn Conner

    - Page 1 - BUILDING SURROGATE MODELS BASED ON DETAILED AND APPROXIMATE SIMULATIONS Zhiguang Qian is taken to integrate data from approximate and detailed simulations to build a surrogate model approximate simulations form the bulk of the data, and they are used to build a model based on a Gaussian

  14. Smoluchowski-Kramers approximation in the case of variable friction

    E-Print Network [OSTI]

    Mark Freidlin; Wenqing Hu

    2012-03-03T23:59:59.000Z

    We consider the small mass asymptotics (Smoluchowski-Kramers approximation) for the Langevin equation with a variable friction coefficient. The limit of the solution in the classical sense does not exist in this case. We study a modification of the Smoluchowski-Kramers approximation. Some applications of the Smoluchowski-Kramers approximation to problems with fast oscillating or discontinuous coefficients are considered.

  15. Technical Note Variational free energy and the Laplace approximation

    E-Print Network [OSTI]

    Daunizeau, Jean

    Technical Note Variational free energy and the Laplace approximation Karl Friston,a, Jérémie October 2006 This note derives the variational free energy under the Laplace approximation, with a focus. This is relevant when using the free energy as an approximation to the log-evidence in Bayesian model averaging

  16. Viscosity and Relaxation Approximation for Hyperbolic Systems of Conservation Laws

    E-Print Network [OSTI]

    Tzavaras, Athanasios E.

    Viscosity and Relaxation Approximation for Hyperbolic Systems of Conservation Laws Athanasios E with the approximation of conservation laws via viscosity or relaxation. The following topics are covered: The general structure of viscosity and relaxation approximations is discussed, as suggested by the second law

  17. Modulated power-law behaviour in Stirling's approximation

    E-Print Network [OSTI]

    Hatton, Les

    Modulated power-law behaviour in Stirling's approximation Les Hatton CISM, University of Kingston. This argument used Stirling's approximation which limits its relevance to larger component sizes. Although power to broaden Stirling's approximation to see if it corresponds with the departures from power-law observed

  18. Bond selective chemistry beyond the adiabatic approximation

    SciTech Connect (OSTI)

    Butler, L.J. [Univ. of Chicago, IL (United States)

    1993-12-01T23:59:59.000Z

    One of the most important challenges in chemistry is to develop predictive ability for the branching between energetically allowed chemical reaction pathways. Such predictive capability, coupled with a fundamental understanding of the important molecular interactions, is essential to the development and utilization of new fuels and the design of efficient combustion processes. Existing transition state and exact quantum theories successfully predict the branching between available product channels for systems in which each reaction coordinate can be adequately described by different paths along a single adiabatic potential energy surface. In particular, unimolecular dissociation following thermal, infrared multiphoton, or overtone excitation in the ground state yields a branching between energetically allowed product channels which can be successfully predicted by the application of statistical theories, i.e. the weakest bond breaks. (The predictions are particularly good for competing reactions in which when there is no saddle point along the reaction coordinates, as in simple bond fission reactions.) The predicted lack of bond selectivity results from the assumption of rapid internal vibrational energy redistribution and the implicit use of a single adiabatic Born-Oppenheimer potential energy surface for the reaction. However, the adiabatic approximation is not valid for the reaction of a wide variety of energetic materials and organic fuels; coupling between the electronic states of the reacting species play a a key role in determining the selectivity of the chemical reactions induced. The work described below investigated the central role played by coupling between electronic states in polyatomic molecules in determining the selective branching between energetically allowed fragmentation pathways in two key systems.

  19. Berry's Phases for Arbitrary Spins Non-Linearly Coupled to External Fields. Application to the Entanglement of N > 2 Non-Correlated One-Half Spins

    E-Print Network [OSTI]

    Marie-Anne Bouchiat; Claude Bouchiat

    2010-11-05T23:59:59.000Z

    We derive the general formula giving the Berry phase for an arbitrary spin, having both magnetic-dipole and electric-quadrupole couplings with external time-dependent fields. We assume that the effective E and B fields remain orthogonal during the quantum cycles. This mild restriction has many advantages. It provides simple symmetries leading to selection rules and the Hamiltonian-parameter and density-matrix spaces coincide for S=1. This implies the identity of the Berry and Aharonov-Anandan phases, which is lost for S>1. We have found that new features of Berry phases emerge for integer spins>2. We provide explicit numerical results of Berry phases for S=2,3,4. We give a precise analysis of the non-adiabatic corrections. The accuracy for satisfying adiabaticity is greatly improved if one chooses for the time derivatives of the parameters a time-dependence having a Blackman pulse shape. This has the effect of taming the non-adiabatic oscillation corrections which could be generated by a linear ramping. For realistic experimental conditions, the non-adibatic corrections can be kept reversal of the angular velocity can be cancelled exactly if the quadrupole to dipole coupling ratio takes a "magic" value. The even ones are cancelled by subtraction of the phases relative to opposite velocities. As a possible application of the results of this paper we suggest a route to holonomic entanglement of N non-correlated 1/2-spins by performing adiabatic cycles governed by a Hamiltonian which is a non-linear function of the total spin operator S defined as the sum of the N spin operators. The case N=4 and Sz=1 is treated explicitly and maximum entanglement is achieved.

  20. EMPLOYEE RIGHTSUNDER THE FAIR LABOR STANDARDS ACT THE UNITED STATES DEPARTMENT OF LABOR WAGE AND HOUR DIVISION

    E-Print Network [OSTI]

    Subramanian, Venkat

    EMPLOYEE RIGHTSUNDER THE FAIR LABOR STANDARDS ACT THE UNITED STATES DEPARTMENT OF LABOR WAGE AND HOUR DIVISION FEDERAL MINIMUM WAGE At least 1 times your regular rate of pay for all hours worked over be assessed for each child labor violation that causes the death or serious injury of any minor employee

  1. PDSF Office Hours 1/23/14 from 2:30 to 4:00 pm at LBNL

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

    2314 from 2:30 to 4:00 pm at LBNL PDSF Office Hours 12314 from 2:30 to 4:00 pm at LBNL January 22, 2014 (0 Comments) PDSF office hours will be from 2:30 to 4:00 pm in 50B-2222...

  2. PDSF Office Hours 10/17/13 from 2:00 to 4:00 pm at LBNL

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

    01713 from 2:00 to 4:00 pm at LBNL PDSF Office Hours 101713 from 2:00 to 4:00 pm at LBNL October 7, 2013 (0 Comments) I have biweekly office hours on Thursdays at LBNL. The...

  3. Sub-Hourly Impacts of High Solar Penetrations in the Western United States: Preprint

    SciTech Connect (OSTI)

    Lew, D.; Brinkman, G.; Ibanez, E.; Hummon, M.; Hodge, B. M.; Heaney, M.; King, J.

    2012-09-01T23:59:59.000Z

    This paper presents results of analysis on the sub-hourly impacts of high solar penetrations from the Western Wind and Solar Integration Study Phase 2. Extreme event analysis showed that most large ramps were due to sunrise and sunset events, which have a significant predictability component. Variability in general was much higher in the high-solar versus high-wind scenario. Reserve methodologies that had already been developed for wind were therefore modified to take into account the predictability component of solar variability.

  4. 20K Hour GATEWAY Testing Results for I-35W Bridge Webinar

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy released a GATEWAY Demonstration report on the longer-term performance of an LED lighting system that was installed on the I-35W Bridge in Minneapolis in September 2008 and represents one of the country’s oldest continuously operated exterior LED lighting installations. Prior to installation, two of the LED luminaires were tested, along with a third luminaire that was not installed on the bridge but was tested for 6,000 hours in a laboratory for comparison purposes.

  5. SeizAlert could give patients 4.5 hour warning of seizure

    ScienceCinema (OSTI)

    Dr. Lee Hively and Kara Kruse

    2010-01-08T23:59:59.000Z

    One percent of Americans, 3 million people, suffer from epilepsy. And their lives are about to be dramatically changed by scientists at Oak Ridge National Laboratory. For 15 years, Dr. Lee Hively has been working on "SeizAlert", a seizure-detecting device that resembles a common PDA. "It allows us to analyze scalp brain waves and give us up to 4.5 hours' forewarning of that event," he said. With the help of partner Kara Kruse, he's now able to help patients predict the previously unpredictable.

  6. Customer Strategies for Responding to Day-Ahead Market HourlyElectricity Pricing

    SciTech Connect (OSTI)

    Goldman, Chuck; Hopper, Nicole; Bharvirkar, Ranjit; Neenan,Bernie; Boisvert, Dick; Cappers, Peter; Pratt, Donna; Butkins, Kim

    2005-08-25T23:59:59.000Z

    Real-time pricing (RTP) has been advocated as an economically efficient means to send price signals to customers to promote demand response (DR) (Borenstein 2002, Borenstein 2005, Ruff 2002). However, limited information exists that can be used to judge how effectively RTP actually induces DR, particularly in the context of restructured electricity markets. This report describes the second phase of a study of how large, non-residential customers' adapted to default-service day-ahead hourly pricing. The customers are located in upstate New York and served under Niagara Mohawk, A National Grid Company (NMPC)'s SC-3A rate class. The SC-3A tariff is a type of RTP that provides firm, day-ahead notice of hourly varying prices indexed to New York Independent System Operator (NYISO) day-ahead market prices. The study was funded by the California Energy Commission (CEC)'s PIER program through the Demand Response Research Center (DRRC). NMPC's is the first and longest-running default-service RTP tariff implemented in the context of retail competition. The mix of NMPC's large customers exposed to day-ahead hourly prices is roughly 30% industrial, 25% commercial and 45% institutional. They have faced periods of high prices during the study period (2000-2004), thereby providing an opportunity to assess their response to volatile hourly prices. The nature of the SC-3A default service attracted competitive retailers offering a wide array of pricing and hedging options, and customers could also participate in demand response programs implemented by NYISO. The first phase of this study examined SC-3A customers' satisfaction, hedging choices and price response through in-depth customer market research and a Constant Elasticity of Substitution (CES) demand model (Goldman et al. 2004). This second phase was undertaken to answer questions that remained unresolved and to quantify price response to a higher level of granularity. We accomplished these objectives with a second customer survey and interview effort, which resulted in a higher, 76% response rate, and the adoption of the more flexible Generalized Leontief (GL) demand model, which allows us to analyze customer response under a range of conditions (e.g. at different nominal prices) and to determine the distribution of individual customers' response.

  7. Evolution of Meteorological Base Models for Estimating Hourly Global Solar Radiation in Texas 

    E-Print Network [OSTI]

    Kim, H.; Baltazar, J.C.; Haberl, J.S

    2013-01-01T23:59:59.000Z

    for Estimating Hourly Global Solar Radiation in Texas Kee Han Kima,b*, Juan-Carlos Baltazarb, and Jeff S. Haberla,b aDepartment of Architecture, Texas A&M University, 3137 TAMU, College Station, TX 77843-3137, U.S.A. bEnergy Systems Laboratory, Texas A... for measured solar radiation data and, as a result, rely on the values from typical meteorological years. Texas, in a similar fashion as other states in the US, does not have an active network for solar radiation data and has a variety of weather conditions...

  8. Evolution of Meteorological Base Models for Estimating Hourly Global Solar Radiation in Texas

    E-Print Network [OSTI]

    Kim, H.; Baltazar, J.C.; Haberl, J.S

    ESL-PA-13-11-01 Available online at www.sciencedirect.com Energy Procedia 00 (2013) 000–000 www.elsevier.com/locate/procedia 2013 ISES Solar World Congress Evaluation of Meteorological Base Models... for Estimating Hourly Global Solar Radiation in Texas Kee Han Kima,b*, Juan-Carlos Baltazarb, and Jeff S. Haberla,b aDepartment of Architecture, Texas A&M University, 3137 TAMU, College Station, TX 77843-3137, U.S.A. bEnergy Systems Laboratory, Texas A...

  9. Jefferson Lab Group Gets 10 Million Hours of Supercomputer Time | Jefferson

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12 InvestigationLab Group Gets 10 Million Hours of

  10. Evaluation of candidate stirling engine heater tube alloys for 1000 hours at 760/sup 0/C

    SciTech Connect (OSTI)

    Misencik, J.A.

    1980-11-01T23:59:59.000Z

    Six tubing alloys were endurance tested in a diesel-fired, Stirling engine simulator materials test rig for 1000 hours at 760/sup 0/C while pressurized at 17 to 21 MPa with either hydrogen or helium. The alloys tested were N-155, A-286, Incoloy 800, 19-9DL, Nitronic 40, and 316 stainless steel. All alloys were in the form of tubing with an outside diameter of 4.8 mm and a wall thickness of 0.8 mm. Hydrogen permeated rapidly through the walls of all six alloys when they were heated to 760/sup 0/C, and repressurization was required every 5 hours during rig testing. In contrast, helium was readily contained. Creep-rupture failures occurred in four of the six alloys pressurized with heluim and in two of the six alloys pressurized with hydrogen. Only two alloys survived the 1000-h endurance test with no failure, N-155 and 316 stainless steel. Stimulaneous exposure to either hydrogen or helium and the combustion environment at 21 MPa and 760/sup 0/C did not seriously degrade the tensile strength of the six alloys in tests at room temperature and 760/sup 0/C after exposure. Decreases in room-temperature ductility were noted and are attributed to aging rather than to hydrogen embrittlement or oxidation in three of the alloys. However, there may be a hydrogen embrittlement effect in the N-155, 19-9DL, and Nitronic 40 alloys.

  11. A thirty-two clock hour driver education classroom curriculum guide

    E-Print Network [OSTI]

    Richardson, William Lee

    1990-01-01T23:59:59.000Z

    A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM CURRICULUM GUIDE A R e c o r d o f St u d y by WILLIAM LEE RICHARDSON S u b m i t t e d t o t h e O f f i c e o f G r a d u a t e S t u d i e s o f Texas A&M U n i v e r s i t y i n p a r t i... a l f u l f i l l m e n t o f t h e r e q u i r e m e n t s f o r t h e de g r e e o f DOCTOR OF EDUCATION December 1990 M a j o r S u b j e c t : I n d u s t r i a l E d u c a t i o n A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM...

  12. NV Energy Large-Scale Photovoltaic Integration Study: Intra-Hour Dispatch and AGC Simulation

    SciTech Connect (OSTI)

    Lu, Shuai; Etingov, Pavel V.; Meng, Da; Guo, Xinxin; Jin, Chunlian; Samaan, Nader A.

    2013-01-02T23:59:59.000Z

    The uncertainty and variability with photovoltaic (PV) generation make it very challenging to balance power system generation and load, especially under high penetration cases. Higher reserve requirements and more cycling of conventional generators are generally anticipated for large-scale PV integration. However, whether the existing generation fleet is flexible enough to handle the variations and how well the system can maintain its control performance are difficult to predict. The goal of this project is to develop a software program that can perform intra-hour dispatch and automatic generation control (AGC) simulation, by which the balancing operations of a system can be simulated to answer the questions posed above. The simulator, named Electric System Intra-Hour Operation Simulator (ESIOS), uses the NV Energy southern system as a study case, and models the system’s generator configurations, AGC functions, and operator actions to balance system generation and load. Actual dispatch of AGC generators and control performance under various PV penetration levels can be predicted by running ESIOS. With data about the load, generation, and generator characteristics, ESIOS can perform similar simulations and assess variable generation integration impacts for other systems as well. This report describes the design of the simulator and presents the study results showing the PV impacts on NV Energy real-time operations.

  13. A thirty-two clock hour driver education classroom curriculum guide 

    E-Print Network [OSTI]

    Richardson, William Lee

    1990-01-01T23:59:59.000Z

    A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM CURRICULUM GUIDE A R e c o r d o f St u d y by WILLIAM LEE RICHARDSON S u b m i t t e d t o t h e O f f i c e o f G r a d u a t e S t u d i e s o f Texas A&M U n i v e r s i t y i n p a r t i... a l f u l f i l l m e n t o f t h e r e q u i r e m e n t s f o r t h e de g r e e o f DOCTOR OF EDUCATION December 1990 M a j o r S u b j e c t : I n d u s t r i a l E d u c a t i o n A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM...

  14. Hours contributed annually by College of Allied Health Sciences dental hygiene students to Urban Smiles...............2,300 Total tutoring hours contributed in 2007 by UTHSC employees volunteering for Our Children -Our Future................750

    E-Print Network [OSTI]

    Cui, Yan

    · Hours contributed annually by College of Allied Health Sciences dental hygiene students to Urban Smiles is the Department of Dental Hygiene's clinical practice in which faculty, staff and students use

  15. approximately constrained elastic: Topics by E-print Network

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

    systems. The method approximates the distribution of the system state using a finite number of particles. By expressing these particles in terms of the control variables, we are...

  16. approximate distributed dynamic: Topics by E-print Network

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

    2 The Relation between Approximation in Distribution and Shadowing in Molecular Dynamics Mathematics Websites Summary: analysis is to explain the apparent reliabil- ity of...

  17. approximate dynamic programming: Topics by E-print Network

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

    STOCK Paris-Sud XI, Universit de 10 Approximate dynamic programming using model-free Bellman Residual Elimination MIT - DSpace Summary: This paper presents an...

  18. Approximating K-means-type clustering via semidefinite programming

    E-Print Network [OSTI]

    Jiming Peng

    2005-04-22T23:59:59.000Z

    Apr 22, 2005 ... Approximating K-means-type clustering via semidefinite ... Abstract: One of the fundamental clustering problems is to assign $n$ points into $k$ ...

  19. Outcome-Space Outer Approximation Algorithm for Linear ...

    E-Print Network [OSTI]

    2007-07-20T23:59:59.000Z

    Jul 20, 2007 ... This paper presents an outcome-space outer approximation algo- rithm for globally solving the linear multiplicative programming prob- lem.

  20. approximate analytical structural: Topics by E-print Network

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

    developed method has been extended to a nonlocal equation arising in steady water wave propagation in two dimensions. We obtain analyic approximation of steady water wave...

  1. Finding approximately rank-one submatrices with the nuclear norm ...

    E-Print Network [OSTI]

    2010-11-08T23:59:59.000Z

    We propose a convex optimization formulation with the nuclear norm and l1-norm to find a large approximately rank-one submatrix of a given nonnegative matrix ...

  2. Finding approximately rank-one submatrices with the nuclear norm ...

    E-Print Network [OSTI]

    Xuan Vinh Doan

    2010-11-08T23:59:59.000Z

    Nov 8, 2010 ... Abstract: We propose a convex optimization formulation with the nuclear norm and $\\ell_1$-norm to find a large approximately rank-one ...

  3. aerodynamic response approximation: Topics by E-print Network

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

    Page Topic Index 1 Managing Approximate Models in Evolutionary Aerodynamic Design Optimization Computer Technologies and Information Sciences Websites Summary: algorithm to a...

  4. approximate entropy based: Topics by E-print Network

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

    equation (1) nt + div n n Jngel, Ansgar 7 Regularization with Approximated L2 Maximum Entropy Method Physics Websites Summary: of a generalized moment of defined...

  5. approximate block newton: Topics by E-print Network

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

    Abstract An extended product-form approximation, based on the principle of maximum entropy (ME), is characterised Ould-Khaoua, Mohamed 28 Low-lying dipole response...

  6. ON LEAST SQUARES EUCLIDEAN DISTANCE MATRIX APPROXIMATION AND COMPLETION

    E-Print Network [OSTI]

    in biological or engineering applications, including molecular structure analysis, protein folding problem. distance geometry, least squares approximation, matrix completion, molecular structure, protein folding

  7. ON LEAST SQUARES EUCLIDEAN DISTANCE MATRIX APPROXIMATION AND COMPLETION

    E-Print Network [OSTI]

    in biological or engineering applications, including molecular structure analysis, protein folding problem approximation, matrix completion, molecular structure, protein folding, conformational analysis. 1. Introduction

  8. An Improved Procedure for Developing a Calibrated Hourly Simulation Model of an Electrically Heated and Cooled Commercial Buildling

    E-Print Network [OSTI]

    Bou-Saada, Tarek Edmond

    lighting, energy efficient heat pumps, a photovoltaic system, envelope measures, and a solar domestic water heating system. To accomplish this, a DOE-2 baseline model was calibrated to the measured hourly data and compared to a building model constructed...

  9. An improved procedure for developing a calibrated hourly simulation model of an electrically heated and cooled commercial building 

    E-Print Network [OSTI]

    Bou-Saada, Tarek Edmond

    1994-01-01T23:59:59.000Z

    Sections . . . . 85 4. 7 Daycare Center . . . . . . . 86 4, 8 Sun Angle Calculator and Altitude Measurement Device . . . 4. 9 Photovoltaic and Domestic Hot Water Solar Panels. . . . . . . . . . 92 4. 10 Heating, Ventilating, and Air... and Daily Minutes of Sunshine . . . . . . . I 1 5 4. 18 Sky Clearness and Daily Percent Possible Sunshine . . . . . . . . 116 4. 19 Hourly Photovoltaic Electricity and Hourly Solar Radiation. . . . . . . . . . 1 1 8 4. 20 Solar Data Example . . . . . 121...

  10. 2500-Hour High Temperature Solid-Oxide Electrolyzer Long Duration Test

    SciTech Connect (OSTI)

    C. M. Stoots; J. E. O'Brien; K. G. Condie; L. Moore-McAteer; J. J. Hartvigsen; D. Larsen

    2009-11-01T23:59:59.000Z

    The Idaho National Laboratory (INL) has been developing the concept of using solid oxide fuel cells as electrolyzers for large-scale, high-temperature (efficient), hydrogen production. This program is sponsored by the U.S. Department of Energy under the Nuclear Hydrogen Initiative. Utilizing a fuel cell as an electrolyzer introduces some inherent differences in cell operating conditions. In particular, the performance of fuel cells operated as electrolyzers degrades with time faster. This issue of electrolyzer cell and stack performance degradation over time has been identified as a major barrier to technology development. Consequently, the INL has been working together with Ceramatec, Inc. (Salt Lake City, Utah) to improve the long-term performance of high temperature electrolyzers. As part of this research partnership, the INL conducted a 2500 hour test of a Ceramatec designed and produced stack operated in the electrolysis mode. This report will provide a summary of experimental results for this long duration test.

  11. High Temperature Solid-Oxide Electrolyzer 2500 Hour Test Results At The Idaho National Laboratory

    SciTech Connect (OSTI)

    Carl Stoots; James O'Brien; Stephen Herring; Keith Condie; Lisa Moore-McAteer; Joseph J. Hartvigsen; Dennis Larsen

    2009-11-01T23:59:59.000Z

    The Idaho National Laboratory (INL) has been developing the concept of using solid oxide fuel cells as electrolyzers for large-scale, high-temperature (efficient), hydrogen production. This program is sponsored by the U.S. Department of Energy under the Nuclear Hydrogen Initiative. Utilizing a fuel cell as an electrolyzer introduces some inherent differences in cell operating conditions. In particular, the performance of fuel cells operated as electrolyzers degrades with time faster. This issue of electrolyzer cell and stack performance degradation over time has been identified as a major barrier to technology development. Consequently, the INL has been working together with Ceramatec, Inc. (Salt Lake City, Utah) to improve the long-term performance of high temperature electrolyzers. As part of this research partnership, the INL conducted a 2500 hour test of a Ceramatec designed and produced stack operated in the electrolysis mode. This paper will provide a summary of experimental results to date for this ongoing test.

  12. Performance of Blackglas{trademark} composites in 4000-hour oxidation study

    SciTech Connect (OSTI)

    Campbell, S.; Gonczy, S. [AlliedSignal Inc., Des Plaines, IL (United States); McNallan, M.; Cox, A. [Univ. of Illinois, Chicago, IL (United States)

    1996-12-31T23:59:59.000Z

    The effect of long term (4000 hour) oxidation on the mechanical properties of Blackglas{trademark}-Nitrided Nextel{trademark}312 Ceramic Matrix Composites in the temperature range of 500{degrees} - 700{degrees}C was investigated. Flexure specimens of the title composites prepared using three different pyrolysis processes were subjected to oxidation in flowing dry air at 500{degrees}, 600{degrees}C, and 700{degrees}C. Samples were removed at several different time intervals for 3-point flexure analysis. Results indicate that processing conditions had very little effect on the oxidation resistance of this system. At 600{degrees} and 700{degrees}C the mechanical properties degrade continuously to a steady value about half the original flexure strength. At 500{degrees}C, material properties initially improve then begin to slowly degrade. Optical microscopy indicates that oxidation of the matrix begins at the matrix/fiber interface and microcracks and proceeds into the bulk of the matrix.

  13. An Approximate Inference Approach to Temporal Optimization in Optimal Control

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    on iterative local approximations present a practical approach to optimal control in robotic systems. However the optimal control framework. The proposed approach, which is applicable to plants with non-linear dynamicsAn Approximate Inference Approach to Temporal Optimization in Optimal Control Konrad C. Rawlik

  14. THE DIFFUSION APPROXIMATION FOR THE LINEAR BOLTZMANN EQUATION

    E-Print Network [OSTI]

    THE DIFFUSION APPROXIMATION FOR THE LINEAR BOLTZMANN EQUATION WITH VANISHING SCATTERING COEFFICIENT equation, Diffusion approximation, Neutron transport equation, Radiative transfer equation subject, 23], neutron transport theory [27]. A typical model linear Boltzmann equation is (t +· x)f(t,x,)= 1

  15. Uncertainty, Performance, and Model Dependency in Approximate Adaptive Nonlinear Control

    E-Print Network [OSTI]

    Szepesvari, Csaba

    Uncertainty, Performance, and Model Dependency in Approximate Adaptive Nonlinear Control M. French, and the performance of a class of approximate model based adaptive controllers is studied. An upper performance bound uncertainty model; control effort bounds require both L 2 and L 1 uncertainty models), and various structural

  16. Technical Note Variational free energy and the Laplace approximation

    E-Print Network [OSTI]

    Penny, Will

    Technical Note Variational free energy and the Laplace approximation Karl Friston,a, Jérémie the variational free energy under the Laplace approximation, with a focus on accounting for additional model complexity induced by increasing the number of model parameters. This is relevant when using the free energy

  17. Energy Content of Colliding Plane Waves using Approximate Noether Symmetries

    E-Print Network [OSTI]

    M. Sharif; Saira Waheed

    2011-09-19T23:59:59.000Z

    This paper is devoted to study the energy content of colliding plane waves using approximate Noether symmetries. For this purpose, we use approximate Lie symmetry method of Lagrangian for differential equations. We formulate the first-order perturbed Lagrangian for colliding plane electromagnetic and gravitational waves. It is shown that in both cases, there does not exist

  18. Approximate Dynamic Programming for Networks: Fluid Models and Constraint Reduction

    E-Print Network [OSTI]

    Veatch, Michael H.

    of approximating functions for the differential cost. The first contribution of this paper is identifying new or piece-wise quadratic. Fluid cost has been used to initialize the value iteration algorithm [5Approximate Dynamic Programming for Networks: Fluid Models and Constraint Reduction Michael H

  19. Approximation of Axisymmetric Darcy Flow V.J. Ervin

    E-Print Network [OSTI]

    Ervin, Vincent J.

    approximation of the Darcy equations in an ax- isymmetric domain, subject to axisymmetric data. Rewriting of convergence for the RT and BDM approximations. Key words. axisymmetric flow; Darcy equation, LBB condition AMSApproximation of Axisymmetric Darcy Flow V.J. Ervin Department of Mathematical Sciences Clemson

  20. Parametric Optimization of Artificial Neural Networks for Signal Approximation Applications

    E-Print Network [OSTI]

    Parametric Optimization of Artificial Neural Networks for Signal Approximation Applications J. Lane.thames@gatech.edu randal.abler@gatech.edu dirk.schaefer@me.gatech.edu ABSTRACT Artificial neural networks are used to solve set of configuration parameters for artificial neural networks such that the network's approximation

  1. Pixelcuts: Scalable Approximate Illumination from Many Point Lights

    E-Print Network [OSTI]

    Keinan, Alon

    Pixelcuts: Scalable Approximate Illumination from Many Point Lights Pramook Khungurn, Thatchaphol approximate low-frequency illumination from many point lights. Its running time is O(n+mk) where n is the number of pixels, m is the number of point lights, and k is a constant the user specifies. Our algorithm

  2. L^p Bernstein Inequalities and Radial Basis Function Approximation

    E-Print Network [OSTI]

    Ward, John P.

    2012-10-19T23:59:59.000Z

    proving Bernstein inequalites for the RBF approximants, we will be able to use them to derive corresponding inverse theorems. Direct theorems concerning approximation by RBFs will be the focus of Section 4 3. The abilty of Green’s functions to invert di...

  3. Fresnel approximations for acoustic fields of rectangularly symmetric sources

    E-Print Network [OSTI]

    Mast, T. Douglas

    Fresnel approximations for acoustic fields of rectangularly symmetric sources T. Douglas Masta for determining the acoustic fields of rectangularly symmetric, baffled, time-harmonic sources under the Fresnel. The expressions presented are generalized to three different Fresnel approximations that correspond, respectively

  4. Approximation of Harmonic Maps and Wave Maps Soren Bartels

    E-Print Network [OSTI]

    Bartels, Soeren

    Approximation of Harmonic Maps and Wave Maps S¨oren Bartels Partial differential equations to certain boundary condtions. If X = then critical points u : N are called harmonic maps into N, ·) = u0, tu(0, ·) = v0. To approximate harmonic maps or wave maps we consider a regular triangula- tion

  5. New approximation for free surface flow of groundwater: capillarity correction

    E-Print Network [OSTI]

    Walter, M.Todd

    capillarity correction for free surface groundwater flow as modelled by the Boussinesq equation is re; Shallow flow expansion; Simplified approximation 1. Introduction Groundwater heads in coastal aquifersNew approximation for free surface flow of groundwater: capillarity correction D.-S. Jeng a,*, B

  6. Properties of the Boltzmann equation in the classical approximation

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

    Tanji, Naoto; Epelbaum, Thomas; Gelis, Francois; Wu, Bin

    2014-12-01T23:59:59.000Z

    We study the Boltzmann equation with elastic point-like scalar interactions in two different versions of the the classical approximation. Although solving numerically the Boltzmann equation with the unapproximated collision term poses no problem, this allows one to study the effect of the ultraviolet cutoff in these approximations. This cutoff dependence in the classical approximations of the Boltzmann equation is closely related to the non-renormalizability of the classical statistical approximation of the underlying quantum field theory. The kinetic theory setup that we consider here allows one to study in a much simpler way the dependence on the ultraviolet cutoff, since onemore »has also access to the non-approximated result for comparison.« less

  7. Properties of the Boltzmann equation in the classical approximation

    SciTech Connect (OSTI)

    Tanji, Naoto [Nishina Center, RIKEN, Wako (Japan). Theoretical Research Division; Brookhaven National Lab. (BNL), Upton, NY (United States); Epelbaum, Thomas [Institut de Physique Theorique (France); Gelis, Francois [Institut de Physique Theorique (France); Wu, Bin [Institut de Physique Theorique (France)

    2014-12-01T23:59:59.000Z

    We study the Boltzmann equation with elastic point-like scalar interactions in two different versions of the the classical approximation. Although solving numerically the Boltzmann equation with the unapproximated collision term poses no problem, this allows one to study the effect of the ultraviolet cutoff in these approximations. This cutoff dependence in the classical approximations of the Boltzmann equation is closely related to the non-renormalizability of the classical statistical approximation of the underlying quantum field theory. The kinetic theory setup that we consider here allows one to study in a much simpler way the dependence on the ultraviolet cutoff, since one has also access to the non-approximated result for comparison.

  8. Vehicle Sharing System Pricing Regulation: A Fluid Approximation

    E-Print Network [OSTI]

    or electric cars). They offer personal mobility allowing users to pay only for the usage. We are interested.1 Context Shoup (2005) reports that, based on a sample of 22 US studies, cars looking for a parking spot contribute to 30% of the city traffic. Moreover cars are used less than 2 hours per day on average but still

  9. Vehicle Sharing System Pricing Regulation: A Fluid Approximation

    E-Print Network [OSTI]

    to reduce traffic congestion (parking issues), noise, and air pollution (using bikes or electric cars.1 Context Shoup [20] reports that, based on a sample of 22 US studies, cars looking for a parking spot contribute to 30% of the city traffic. Moreover most cars are not in use 90% of the time (use 2 hours per day

  10. Usefulness of bound-state approximations in reaction theory

    SciTech Connect (OSTI)

    Adhikari, S.K.

    1981-08-01T23:59:59.000Z

    A bound-state approximation when applied to certain operators, such as the many-body resolvent operator for a two-body fragmentation channel, in many-body scattering equations, reduces such equations to equivalent two-body scattering equations which are supposed to provide a good description of the underlying physical process. In this paper we test several variants of bound-state approximations in the soluble three-boson Amado model and find that such approximations lead to weak and unacceptable kernels for the equivalent two-body scattering equations and hence to a poor description of the underlying many-body process.

  11. Insights from Smart Meters: The Potential for Peak-Hour Savings from Behavior-Based Programs

    SciTech Connect (OSTI)

    Todd, Annika; Perry, Michael; Smith, Brian; Sullivan, Michael; Cappers, Peter; Goldman, Charles

    2014-03-25T23:59:59.000Z

    The rollout of smart meters in the last several years has opened up new forms of previously unavailable energy data. Many utilities are now able in real-time to capture granular, household level interval usage data at very high-frequency levels for a large proportion of their residential and small commercial customer population. This can be linked to other time and locationspecific information, providing vast, constantly growing streams of rich data (sometimes referred to by the recently popular buzz word, “big data”). Within the energy industry there is increasing interest in tapping into the opportunities that these data can provide. What can we do with all of these data? The richness and granularity of these data enable many types of creative and cutting-edge analytics. Technically sophisticated and rigorous statistical techniques can be used to pull interesting insights out of this highfrequency, human-focused data. We at LBNL are calling this “behavior analytics”. This kind of analytics has the potential to provide tremendous value to a wide range of energy programs. For example, highly disaggregated and heterogeneous information about actual energy use would allow energy efficiency (EE) and/or demand response (DR) program implementers to target specific programs to specific households; would enable evaluation, measurement and verification (EM&V) of energy efficiency programs to be performed on a much shorter time horizon than was previously possible; and would provide better insights in to the energy and peak hour savings associated with specifics types of EE and DR programs (e.g., behavior-based (BB) programs). In this series, “Insights from Smart Meters”, we will present concrete, illustrative examples of the type of value that insights from behavior analytics of these data can provide (as well as pointing out its limitations). We will supply several types of key findings, including: • Novel results, which answer questions the industry previously was unable to answer; • Proof-of-concept analytics tools that can be adapted and used by others; and • Guidelines and protocols that summarize analytical best practices. This report focuses on one example of the kind of value that analysis of this data can provide: insights into whether behavior-based (BB) efficiency programs have the potential to provide peak-hour energy savings.

  12. Remaining FY13 Compensatory (COMP) Bank Balances in ITAMS This is to remind you that compensatory (COMP) hours may not be carried over from

    E-Print Network [OSTI]

    Almor, Amit

    Remaining FY13 Compensatory (COMP) Bank Balances in ITAMS This is to remind you that compensatory week that Fiscal Year 2013 COMP hours can be used via ITAMS. Approved timesheets for the June 9-15th University policy, hours may not be recorded in units of less than one-quarter hour. ITAMS only allows work

  13. Remaining FY14 Compensatory (COMP) Bank Balances in ITAMS This is to remind you that compensatory (COMP) hours may not be carried over from

    E-Print Network [OSTI]

    Almor, Amit

    Remaining FY14 Compensatory (COMP) Bank Balances in ITAMS This is to remind you that compensatory week that Fiscal Year 2014 COMP hours can be used via ITAMS. Approved timesheets for the June 8-14th that per University policy, hours may not be recorded in units of less than one-quarter hour. ITAMS only

  14. 1. Sending some rejection notes to deals that we are going to pass on.about 14 hours ago via web

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    1. Sending some rejection notes to deals that we are going to pass on.about 14 hours ago via web 2 much action going on!about 14 hours ago via web 3. Just got new commitment from top tier venture firm for Series B funding for another portfolio company.about 14 hours ago via web 4. interview with a potential

  15. Figure 5.19. Light micrographs showing the microstructure of duplex rolled metal IC381 solution treated at 1300 C for 26 hours and then quenched into

    E-Print Network [OSTI]

    Cambridge, University of

    of duplex rolled metal IC381 solution treated at 1300 °C for 26 hours and then quenched into water the microstructure of duplex rolled metal IC373 solution treated at 1300 QC for 26 hours amI then quenched into water solution treated at 1300 QC for 26 hours and then quenched into water. The llleasured volullle fraction

  16. Approximating the Minimum Spanning Tree Weight in Sublinear Time

    E-Print Network [OSTI]

    Trevisan, Luca

    Approximating the Minimum Spanning Tree Weight in Sublinear Time Bernard Chazelle #3; Ronitt a parameter 0 minimum spanning tree- components algorithm picks O(1=#15; 2 ) vertices in the graph and then grows \\local spanning trees" whose

  17. Approximate dynamic programming with applications in multi-agent systems

    E-Print Network [OSTI]

    Valenti, Mario J. (Mario James), 1976-

    2007-01-01T23:59:59.000Z

    This thesis presents the development and implementation of approximate dynamic programming methods used to manage multi-agent systems. The purpose of this thesis is to develop an architectural framework and theoretical ...

  18. PLASMA Approximate Dynamic Programming finally cracks the locomotive optimization problem

    E-Print Network [OSTI]

    Powell, Warren B.

    PLASMA ­ Approximate Dynamic Programming finally cracks the locomotive optimization problem schedules and new operating policies. PLASMA is currently running at Norfolk Southern for strategic of PLASMA: Each locomotive is modeled individually, making it possible to capture both horsepower

  19. Fast Approximations for Online Scheduling of Outpatient Procedure ...

    E-Print Network [OSTI]

    2014-06-18T23:59:59.000Z

    Jun 18, 2014 ... ? > SmU , any permutation of items to bins that uses the full amount of ... approximation solution value will both tend to cf mU + cv(? ? SmU ).

  20. SPLITTING MANIFOLD APPROXIMATE FIBRATIONS J. L. BRYANT AND P. KIRBY

    E-Print Network [OSTI]

    Aluffi, Paolo

    SPLITTING MANIFOLD APPROXIMATE FIBRATIONS J. L. BRYANT AND P. KIRBY Abstract. Suppose M, embeddings. Partially supported by NSF grant DMS-9626624. 1 #12; 2 J. L. BRYANT AND P. KIRBY 2. Definitions

  1. Numerical Approximations of Stochastic Optimal Stopping and Control Problems 

    E-Print Network [OSTI]

    Siska, David

    2007-01-01T23:59:59.000Z

    We study numerical approximations for the payoff function of the stochastic optimal stopping and control problem. It is known that the payoff function of the optimal stopping and control problem corresponds to the solution ...

  2. Approximate inference : decomposition methods with applications to networks

    E-Print Network [OSTI]

    Jung, Kyomin

    2009-01-01T23:59:59.000Z

    Markov random field (MRF) model provides an elegant probabilistic framework to formulate inter-dependency between a large number of random variables. In this thesis, we present a new approximation algorithm for computing ...

  3. Approximate translation : media, narrative, and experience in urban design

    E-Print Network [OSTI]

    Crisman, Jonathan

    2013-01-01T23:59:59.000Z

    Approximate translation is developed as a design process through which the place-embedded history of an urban environment can be understood, allowing for better design and intervention in that urban environment. Generally, ...

  4. Non-ideal boson system in the Gaussian approximation

    SciTech Connect (OSTI)

    Tommasini, P.R. [Institute for Theoretical Atomic and Molecular Physics, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States)] [Institute for Theoretical Atomic and Molecular Physics, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States); de Toledo Piza, A.F. [Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05389-970 Sao Paulo, SP, (Brasil)] [Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05389-970 Sao Paulo, SP, (Brasil)

    1997-01-01T23:59:59.000Z

    We investigate ground-state and thermal properties of a system of non-relativistic bosons interacting through repulsive, two-body interactions in a self-consistent Gaussian mean-field approximation which consists in writing the variationally determined density operator as the most general Gaussian functional of the quantized field operators. Finite temperature results are obtained in a grand canonical framework. Contact is made with the results of Lee, Yang, and Huang in terms of particular truncations of the Gaussian approximation. The full Gaussian approximation supports a free phase or a thermodynamically unstable phase when contact forces and a standard renormalization scheme are used. When applied to a Hamiltonian with zero range forces interpreted as an effective theory with a high momentum cutoff, the full Gaussian approximation generates a quasi-particle spectrum having an energy gap, in conflict with perturbation theory results. {copyright} 1997 Academic Press, Inc.

  5. A multiscale approximation algorithm for the cardinality constrained knapsack problem

    E-Print Network [OSTI]

    Krishnan, Bharath Kumar

    2006-01-01T23:59:59.000Z

    I develop a multiscale approximation algorithm for the cardinality constrained knapsack problem. The algorithm consists of three steps: a rounding and reduction step where a hierarchical representation of the problem data ...

  6. Generalized eikonal approximation for strong-field ionization

    E-Print Network [OSTI]

    Vélez, F Cajiao; Kami?ski, J Z

    2015-01-01T23:59:59.000Z

    We develop the eikonal perturbation theory to describe the strong-field ionization by finite laser pulses. This approach in the first order with respect to the binding potential (the so-called generalized eikonal approximation) avoids a singularity at the potential center. Thus, in contrast to the ordinary eikonal approximation, it allows to treat rescattering phenomena in terms of quantum trajectories. We demonstrate how the first Born approximation and its domain of validity follow from eikonal perturbation theory. Using this approach, we study the coherent diffraction patterns in photoelectron energy spectra and their modifications induced by the interaction of photoelectrons with the atomic potential. Along with these first results, we discuss the prospects of using the generalized eikonal approximation to study strong-field ionization from multi-centered atomic systems and to study other strong-field phenomena.

  7. Approximate Associative Memristive Memory for Energy-Efficient GPUs

    E-Print Network [OSTI]

    Liebling, Michael

    Approximate Associative Memristive Memory for Energy-Efficient GPUs Abbas Rahimi, Amirali Ghofrani at the architectural and algorithmic levels. At the hardware level, energy-efficiency techniques that employ voltage

  8. Penumbra Maps: Approximate Soft Shadows in Real-Time

    E-Print Network [OSTI]

    Wyman, Chris

    ;Penumbra Map Assumptions · A hard shadow is a reasonable approximation for a shadow's umbra · Object silhouettes remain constant over light's surface #12;Key Insight · When using a hard shadow as the umbra, all

  9. Amorphous silica in ultra-high performance concrete: First hour of hydration

    SciTech Connect (OSTI)

    Oertel, Tina, E-mail: tina.oertel@isc.fraunhofer.de [Fraunhofer-Institute for Silicate Research ISC, Neunerplatz 2, 97082 Würzburg (Germany); Chair for Inorganic Chemistry I, Universität Bayreuth, Universitätsstr. 30, 95440 Bayreuth (Germany); Hutter, Frank [Fraunhofer-Institute for Silicate Research ISC, Neunerplatz 2, 97082 Würzburg (Germany); Helbig, Uta, E-mail: uta.helbig@th-nuernberg.de [Chair for Crystallography and X-ray Methods, Technische Hochschule Nürnberg Georg Simon Ohm, Wassertorstraße 10, 90489 Nürnberg (Germany); Sextl, Gerhard [Fraunhofer-Institute for Silicate Research ISC, Neunerplatz 2, 97082 Würzburg (Germany); Chair for Chemical Technology of Advanced Materials, Julius Maximilian Universität, Röntgenring 11, 97070 Würzburg (Germany)

    2014-04-01T23:59:59.000Z

    Amorphous silica in the sub-micrometer size range is widely used to accelerate cement hydration. Investigations including properties of silica which differ from the specific surface area are rare. In this study, the reactivity of varying types of silica was evaluated based on their specific surface area, surface silanol group density, content of silanol groups and solubility in an alkaline suspension. Pyrogenic silica, silica fume and silica synthesized by hydrolysis and condensation of alkoxy silanes, so-called Stoeber particles, were employed. Influences of the silica within the first hour were further examined in pastes with water/cement ratios of 0.23 using in-situ X-ray diffraction, cryo scanning electron microscopy and pore solution analysis. It was shown that Stoeber particles change the composition of the pore solution. Na{sup +}, K{sup +}, Ca{sup 2+} and silicate ions seem to react to oligomers. The extent of this reaction might be highest for Stoeber particles due to their high reactivity.

  10. Hourly global and diffuse radiation of Lagos, Nigeria-correlation with some atmospheric parameters

    SciTech Connect (OSTI)

    Chendo, M.A.C.; Maduekwe, A.A.L. (Univ. of Lagos, Akoka (Nigeria))

    1994-03-01T23:59:59.000Z

    The influence of four climatic parameters on the hourly diffuse fraction in Lagos, Nigeria, has been studied. Using data for two years, new correlations were established. The standard error of the Liu and Jordan-type equation was reduced by 12.83% when solar elevation, ambient temperature, and relative humidity were used together as predictor variables for the entire data set. Ambient temperature and relative humidity proved to be very important variables for predicting the diffuse fraction of the solar radiation passing through the humid atmosphere of the coastal and tropic city of Lagos. Seasonal analysis carried out with the data showed improvements on the standard errors for the new seasonal correlations. In the case of the dry season, the improvement was 18.37%, whole for the wet season, this was 12.37%. Comparison with existing correlations showed that the performance of the one parameter model (namely K[sub t]), of Orgill and Hollands and Reindl, Beckman, and Duffie were very different from the Liu and Jordan-type model obtained for Lagos.

  11. Shorter Tours by Nicer Ears 7/5-approximation for graphic TSP,

    E-Print Network [OSTI]

    Vygen, Jens

    case called Graphic TSP: approximation ratio 1.5 - (Gharan, Saberi, Singh [2011]) approximation ratio 1, Saberi, Singh [2011]) approximation ratio 1.461 (M¨omke, Svensson [2011]) approximation ratio 1

  12. Approximation of linear partial differential equations on spheres 

    E-Print Network [OSTI]

    Le Gia, Quoc Thong

    2004-09-30T23:59:59.000Z

    Subject: Mathematics iii ABSTRACT Approximation of Linear Partial Di®erential Equations on Spheres. (August 2003) Quoc Thong Le Gia, B.S., University of New South Wales; M.S., Texas A&M University Co{Chairs of Advisory Committee: Dr. Joseph D. Ward Dr... . . . . . . . . . . . . . . . . . 15 II INTERPOLATION ON SPHERES BY DILATED SBFs : : : : 16 A. Approximation theorems . . . . . . . . . . . . . . . . . . . 16 B. Locally supported basis functions on Rn+1 and Sn . . . . . 18 1. Compactly supported strictly positive deŻnite func- tions...

  13. Mean field approximation for noisy delay coupled excitable neurons

    E-Print Network [OSTI]

    Nikola Buric; Dragana Rankovic; Kristina Todorovic; Nebojsa Vasovic

    2010-03-26T23:59:59.000Z

    Mean field approximation of a large collection of FitzHugh-Nagumo excitable neurons with noise and all-to-all coupling with explicit time-delays, modelled by $N\\gg 1$ stochastic delay-differential equations is derived. The resulting approximation contains only two deterministic delay-differential equations but provides excellent predictions concerning the stability and bifurcations of the averaged global variables of the exact large system.

  14. After-hours Power Status of Office Equipment and Inventory of Miscellaneous Plug-load Equipment

    SciTech Connect (OSTI)

    Roberson, Judy A.; Webber, Carrie A.; McWhinney, Marla C.; Brown, Richard E.; Pinckard, Margaret J.; Busch, John F.

    2004-01-22T23:59:59.000Z

    This research was conducted in support of two branches of the EPA ENERGY STAR program, whose overall goal is to reduce, through voluntary market-based means, the amount of carbon dioxide emitted in the U.S. The primary objective was to collect data for the ENERGY STAR Office Equipment program on the after-hours power state of computers, monitors, printers, copiers, scanners, fax machines, and multi-function devices. We also collected data for the ENERGY STAR Commercial Buildings branch on the types and amounts of ''miscellaneous'' plug-load equipment, a significant and growing end use that is not usually accounted for by building energy managers. This data set is the first of its kind that we know of, and is an important first step in characterizing miscellaneous plug loads in commercial buildings. The main purpose of this study is to supplement and update previous data we collected on the extent to which electronic office equipment is turned off or automatically enters a low power state when not in active use. In addition, it provides data on numbers and types of office equipment, and helps identify trends in office equipment usage patterns. These data improve our estimates of typical unit energy consumption and savings for each equipment type, and enables the ENERGY STAR Office Equipment program to focus future effort on products with the highest energy savings potential. This study expands our previous sample of office buildings in California and Washington DC to include education and health care facilities, and buildings in other states. We report data from twelve commercial buildings in California, Georgia, and Pennsylvania: two health care buildings, two large offices (> 500 employees each), three medium offices (50-500 employees), four education buildings, and one ''small office'' that is actually an aggregate of five small businesses. Two buildings are in the San Francisco Bay area of California, five are in Pittsburgh, Pennsylvania, and five are in Atlanta, Georgia.

  15. Predicting Future Hourly Residential Electrical Consumption: A Machine Learning Case Study

    SciTech Connect (OSTI)

    Edwards, Richard E [ORNL; New, Joshua Ryan [ORNL; Parker, Lynne Edwards [ORNL

    2012-01-01T23:59:59.000Z

    Whole building input models for energy simulation programs are frequently created in order to evaluate specific energy savings potentials. They are also often utilized to maximize cost-effective retrofits for existing buildings as well as to estimate the impact of policy changes toward meeting energy savings goals. Traditional energy modeling suffers from several factors, including the large number of inputs required to characterize the building, the specificity required to accurately model building materials and components, simplifying assumptions made by underlying simulation algorithms, and the gap between the as-designed and as-built building. Prior works have attempted to mitigate these concerns by using sensor-based machine learning approaches to model energy consumption. However, a majority of these prior works focus only on commercial buildings. The works that focus on modeling residential buildings primarily predict monthly electrical consumption, while commercial models predict hourly consumption. This means there is not a clear indicator of which techniques best model residential consumption, since these methods are only evaluated using low-resolution data. We address this issue by testing seven different machine learning algorithms on a unique residential data set, which contains 140 different sensors measurements, collected every 15 minutes. In addition, we validate each learner's correctness on the ASHRAE Great Energy Prediction Shootout, using the original competition metrics. Our validation results confirm existing conclusions that Neural Network-based methods perform best on commercial buildings. However, the results from testing our residential data set show that Feed Forward Neural Networks, Support Vector Regression (SVR), and Linear Regression methods perform poorly, and that Hierarchical Mixture of Experts (HME) with Least Squares Support Vector Machines (LS-SVM) performs best - a technique not previously applied to this domain.

  16. Lot #62W (Red Cedar Road).........................................................................................................................D3 Rate is 80 per half hour for visitors. The rate is 40 per half hour for alumni with valid MSU Alumni

    E-Print Network [OSTI]

    )................................................................................................................................... B5 Employee parking and 147 metered spots. Meter rate is $1.50 per hour. Ramp #2 (Auditorium Road. Employee parking spaces are available to visitors 6pm through 7am Monday-- Friday and all day weekends Library) is available to visitors 11pm through 7am Monday--Friday and after 2pm Saturday and Sunday. ( 2

  17. Anisotropic Homogeneous Cosmologies in the Post-Newtonian Approximation

    E-Print Network [OSTI]

    Tamath Rainsford

    2000-07-23T23:59:59.000Z

    In this paper we explore how far the post-Newtonian theory goes in overcoming the difficulties associated with anisotropic homogeneous cosmologies in the Newtonian approximation. It will be shown that, unlike in the Newtonian case, the cosmological equations of the post-Newtonian approximation are much more in the spirit of general relativity with regard to the nine Bianchi types and issues of singularities. The situations of vanishing rotation and vanishing shear are treated separately. The homogeneous Bianchi I model is considered as an example of a rotation-free cosmology with anisotropy. It is found in the Newtonian approximation that there are arbitrary functions that need to be given for all time if the initial value problem is to be well-posed, while in the post-Newtonian case there is no such need. For the general case of a perfect fluid only the post-Newtonian theory can satisfactorily describe the effects of pressure. This is in accordance with findings in an earlier paper where the post-Newtonian approximation was applied to homogeneous cosmologies. For a shear-free anisotropic homogeneous cosmology the Newtonian theory of Heckmann and Sch\\"ucking is explored. Comparisons with its relativistic and post-Newtonian counterparts are made. In the Newtonian theory solutions exist to which there are no analogues in general relativity. The post-Newtonian approximation may provide a way out.

  18. Variational principles with Padé approximants for tearing mode analysis

    SciTech Connect (OSTI)

    Cole, Andrew J. [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)] [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States); Finn, John M. [Applied Mathematics and Plasma Physics, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)] [Applied Mathematics and Plasma Physics, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)

    2014-03-15T23:59:59.000Z

    Tearing modes occur in several distinct physical regimes, and it is often important to compute the inner layer response for these modes with various effects. There is a need for an approximate and efficient method of solving the inner layer equations in all these regimes. In this paper, we introduce a method of solving the inner layer equations based on using a variational principle with Padé approximants. For all the regimes considered, the main layer equations to be solved are inhomogeneous, and Padé approximants give a convenient and efficient method of satisfying the correct asymptotic behavior at the edge of the layer. Results using this variational principle—Padé approximant method in three of these regimes is presented. These regimes are the constant-? resistive-inertial (RI) regime, the constant-? viscoresistive regime, and the non-constant-? inviscid tearing regime. The last regime includes the constant-? RI regime and the inertial regime. The results show that reasonable accuracy can be obtained very efficiently with Padé approximants having a small number of parameters.

  19. 650 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 26, NO. 2, APRIL 2011 Hourly Scheduling of DC Transmission Lines in

    E-Print Network [OSTI]

    Fu, Yong

    Transmission Lines in SCUC With Voltage Source Converters Azim Lotfjou, Mohammad Shahidehpour, Fellow, IEEE transmission lines, se- curity-constrained unit commitment, voltage-source converters. NOMENCLATURE Index of ac;LOTFJOU et al.: HOURLY SCHEDULING OF DC TRANSMISSION LINES 651 , Vector of real and reactive power

  20. Energy savings can be communicated in terms of kilowatt hours (energy), carbon (climate change) or pounds (cost).

    E-Print Network [OSTI]

    McAuley, Derek

    AIM Energy savings can be communicated in terms of kilowatt hours (energy), carbon (climate change) or pounds (cost). We want to know if these different communication units prime different motivations more broadly. This implies that considering carbon may result in wider changes in sustainable behaviour

  1. Accident/Incident Reporting Form & Investigation Report FAX COMPLETED FORM (Within 24 hours) TO: 519-661-2079 (82079)

    E-Print Network [OSTI]

    Lennard, William N.

    Accident/Incident Reporting Form & Investigation Report FAX COMPLETED FORM (Within 24 hours) TO ­ Accident/Incident Reporting Form PART A Name of Employee: ______________________________________ Employee: Report Only Accident Incident No Injury/Hazard First Aid Lost Time Non-Lost Time (If Report Only

  2. Approximations by gravitational fields due to restricted unit point masses

    E-Print Network [OSTI]

    Shull, Carolyn Sue Flowers

    1973-01-01T23:59:59.000Z

    approximations by Chui (1, 3, 4j and D. J. Newman $12$. Some open problems will be discussed including a conjecture by Chui f2]. I ht th ' th ~Pdl f~hA 1 Mth i I ~gociet is used as a pattern for format, CHAPTER I UNIFORM APPROXIMATION ON COMPACT SETS Let C... free analytic functions in D are not approximable. Also the following result was obtained in fgj . THEOREM 1. 4. A closed set R dis oint from a domain D which lies in som h lf- 1 ne H is ol omial a roximation set relative t b~fl fRt~tbf th I t f3d...

  3. Non-perturbative QCD amplitudes in quenched and eikonal approximations

    SciTech Connect (OSTI)

    Fried, H.M. [Physics Department, Brown University, Providence, RI 02912 (United States); Grandou, T., E-mail: Thierry.Grandou@inln.cnrs.fr [Université de Nice-Sophia Antipolis, Institut Non Linéaire de Nice, UMR 6618 CNRS 7335, 1361 routes des Lucioles, 06560 Valbonne (France); Sheu, Y.-M., E-mail: ymsheu@alumni.brown.edu [Université de Nice-Sophia Antipolis, Institut Non Linéaire de Nice, UMR 6618 CNRS 7335, 1361 routes des Lucioles, 06560 Valbonne (France)

    2014-05-15T23:59:59.000Z

    Even though approximated, strong coupling non-perturbative QCD amplitudes remain very difficult to obtain. In this article, in eikonal and quenched approximations at least, physical insights are presented that rely on the newly-discovered property of effective locality. The present article also provides a more rigorous mathematical basis for the crude approximations used in the previous derivation of the binding potential of quarks and nucleons. Furthermore, the techniques of Random Matrix calculus along with Meijer G-functions are applied to analyze the generic structure of fermionic amplitudes in QCD. - Highlights: • We discuss the physical insight of effective locality to QCD fermionic amplitudes. • We show that an unavoidable delta function goes along with the effective locality property. • The generic structure of QCD fermion amplitudes is obtained through Random Matrix calculus.

  4. Analytical approximations for x-ray cross sections III

    SciTech Connect (OSTI)

    Biggs, F; Lighthill, R

    1988-08-01T23:59:59.000Z

    This report updates our previous work that provided analytical approximations to cross sections for both photoelectric absorption of photons by atoms and incoherent scattering of photons by atoms. This representation is convenient for use in programmable calculators and in computer programs to evaluate these cross sections numerically. The results apply to atoms of atomic numbers between 1 and 100 and for photon energiesgreater than or equal to10 eV. The photoelectric cross sections are again approximated by four-term polynomials in reciprocal powers of the photon energy. There are now more fitting intervals, however, than were used previously. The incoherent-scattering cross sections are based on the Klein-Nishina relation, but use simpler approximate equations for efficient computer evaluation. We describe the averaging scheme for applying these atomic results to any composite material. The fitting coefficients are included in tables, and the cross sections are shown graphically. 100 graphs, 1 tab.

  5. On the approximation of crack shapes found during inservice inspection

    SciTech Connect (OSTI)

    Bhate, S.R.; Chawla, D.S.; Kushwaha, H.S. [Bhabha Atomic Research Centre, Bombay (India)] [and others

    1997-04-01T23:59:59.000Z

    This paper addresses the characterization of axial internal flaw found during inservice inspection of a pipe. J-integral distribution for various flaw shapes is obtained using line spring finite, element method. The peak J-value and its distribution across the crack is found to be characteristic feature of each shape. The triangular shape yields peak J-value away from the center, the point of depth. The elliptic approximation results in large overestimate of J-value for unsymmetric flaws. Triangular approximation is recommended for such flaws so that further service can be obtained from the component.

  6. Perturbative stability of the approximate Killing field eigenvalue problem

    E-Print Network [OSTI]

    Christopher Beetle; Shawn Wilder

    2013-12-31T23:59:59.000Z

    An approximate Killing field may be defined on a compact, Riemannian geometry by solving an eigenvalue problem for a certain elliptic operator. This paper studies the effect of small perturbations in the Riemannian metric on the resulting vector field. It shows that small metric perturbations, as measured using a Sobolev-type supremum norm on the space of Riemannian geometries on a fixed manifold, yield small perturbations in the approximate Killing field, as measured using a Hilbert-type square integral norm. It also discusses applications to the problem of computing the spin of a generic black hole in general relativity.

  7. Dynamical entanglement versus symmetry and dynamics of classical approximations

    SciTech Connect (OSTI)

    Buric, Nikola [Department of Physics and Mathematics, Faculty of Pharmacy, University of Beograd, Vojvode Stepe 450, 11000 Belgrade (Serbia and Montenegro)

    2006-05-15T23:59:59.000Z

    It is shown that dynamical entanglement between two qubits depends on the symmetry of the quantum model. On the other hand, the latter is reflected in the qualitative properties of the dynamics of a classical approximation of the quantum system. For generic separable pure initial states, the dynamical entanglement is larger if the system is less symmetric and its classical approximation is chaotic. The influence of different types of Markov environments on the established relation between the dynamical entanglement, symmetry and the classical dynamics is also studied.

  8. Fridge of the future: Designing a one-kilowatt-hour/day domestic refrigerator-freezer

    SciTech Connect (OSTI)

    Vineyard, E.A.; Sand, J.R.

    1998-03-01T23:59:59.000Z

    An industry/government Cooperative Research and Development Agreement (CRADA) was established to evaluate and test design concepts for a domestic refrigerator-freezer unit that represents approximately 60% of the US market. The goal of the CRADA was to demonstrate advanced technologies which reduce, by 50 percent, the 1993 NAECA standard energy consumption for a 20 ft{sup 3} (570 I) top-mount, automatic-defrost, refrigerator-freezer. For a unit this size, the goal translated to an energy consumption of 1.003 kWh/d. The general objective of the research was to facilitate the introduction of cost-efficient technologies by demonstrating design changes that can be effectively incorporated into new products. A 1996 model refrigerator-freezer was selected as the baseline unit for testing. Since the unit was required to meet the 1993 NAECA standards, the energy consumption was quite low (1.676 kWh/d), thus making further reductions in energy consumption very challenging. Among the energy saving features incorporated into the original design of the baseline unit were a low-wattage evaporator fan, increased insulation thicknesses, and liquid line flange heaters.

  9. Experimental and cost analyses of a one kilowatt-hour/day domestic refrigerator-freezer

    SciTech Connect (OSTI)

    Vineyard, E.A.; Sand, J.R.

    1997-05-01T23:59:59.000Z

    Over the past ten years, government regulations for energy standards, coupled with the utility industry`s promotion of energy-efficient appliances, have prompted appliance manufacturers to reduce energy consumption in refrigerator-freezers by approximately 40%. Global concerns over ozone depletion have also required the appliance industry to eliminate CFC-12 and CFC-11 while concurrently improving energy efficiency to reduce greenhouse emissions. In response to expected future regulations that will be more stringent, several design options were investigated for improving the energy efficiency of a conventionally designed, domestic refrigerator-freezer. The options, such as cabinet and door insulation improvements and a high-efficiency compressor were incorporated into a prototype refrigerator-freezer cabinet and refrigeration system. Baseline energy consumption of the original 1996 production refrigerator-freezer, along with cabinet heat load and compressor calorimeter test results, were extensively documented to provide a firm basis for experimentally measured energy savings. The goal for the project was to achieve an energy consumption that is 50% below in 1993 National Appliance Energy Conservation Act (NAECA) standard for 20 ft{sup 3} (570 l) units. Based on discussions with manufacturers to determine the most promising energy-saving options, a laboratory prototype was fabricated and tested to experimentally verify the energy consumption of a unit with vacuum insulation around the freezer, increased door thicknesses, a high-efficiency compressor, a low wattage condenser fan, a larger counterflow evaporator, and adaptive defrost control.

  10. August and September Approximately 29 percent from husks

    E-Print Network [OSTI]

    minutes. Cool promptly in several changes of cold water and drain. Whole-kernel corn: Cut kernels from. Scrape the cobs with the back of the knife to remove the juice and the hearts of the kernels. Pack corn for approximately the same length of time the corn was blanched) and drain well. Tightly ',vrap ears individually

  11. Fractal Inverse Problem: Approximation Formulation and Differential Methods

    E-Print Network [OSTI]

    Guérin, Eric

    Fractal Inverse Problem: Approximation Formulation and Differential Methods ´Eric Gu´erin1 Introduction 1.1 Fractal Inverse Problem The fractal inverse problem is an important research area with a great number of potential application fields. It consists in finding a fractal model or code that generates

  12. Approximating the Minimum Spanning Tree Weight in Sublinear Time

    E-Print Network [OSTI]

    Goldwasser, Shafi

    Approximating the Minimum Spanning Tree Weight in Sublinear Time #3; Bernard Chazelle y Ronitt a parameter 0 minimum span- ning tree in the graph and then grows \\local spanning trees" whose sizes are speci#12;ed by a stochastic process. From

  13. Boundary approximate controllability of some linear parabolic April 5, 2013

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Boundary approximate controllability of some linear parabolic systems April 5, 2013 Guillaume Olive controllability of two classes of linear parabolic systems, namely a system of n heat equations coupled through are the only ones concerning the boundary controllability of linear parabolic systems of heat-type. For more

  14. Exact and Approximate Sampling by Systematic Stochastic Search

    E-Print Network [OSTI]

    Tenenbaum, Josh

    Exact and Approximate Sampling by Systematic Stochastic Search Vikash Mansinghka MIT BCS & CSAIL exact samples over high-dimensional spaces from exact sam- ples over lower-dimensional subspaces. Our do this by generalizing ideas from classic AI search to the stochastic setting. Just as systematic

  15. An Equivalence Between Sparse Approximation and Support Vector Machines 1

    E-Print Network [OSTI]

    Poggio, Tomaso

    An Equivalence Between Sparse Approximation and Support Vector Machines 1 Federico Girosi Center is equivalent to SVM in the following sense: if applied to the same data set the two techniques give the same; Chen, Donoho and Saunders, 1995), are actually equivalent, in the case of noiseless data. By equivalent

  16. Calculating reactor transfer functions by Pade approximation via Lanczos algorithm

    E-Print Network [OSTI]

    Pázsit, Imre

    Calculating reactor transfer functions by PadeĂ? approximation via Lanczos algorithm Zhifeng Kuang a function of a reactor, i.e. the neutron noise induced by a localised perturbation is calculated in one, *,1 , Imre PaĂ? zsit a , Axel Ruhe b a Department of Reactor Physics, Chalmers University of Technology

  17. Non-linear regression models for Approximate Bayesian Computation

    E-Print Network [OSTI]

    Robert, Christian P.

    Non-linear regression models for Approximate Bayesian Computation (ABC) Michael Blum Olivier ABC #12;Blum and OF (2009) suggest the use of non-linear conditional heteroscedastic regression models) Linear regression-based ABC can sometimes be improved #12;abc of ABC Using stochastic simulations

  18. Sensitivity, Approximation and Uncertainty in Power System Dynamic Simulation

    E-Print Network [OSTI]

    1 Sensitivity, Approximation and Uncertainty in Power System Dynamic Simulation Ian A. Hiskens, Fellow, IEEE Jassim Alseddiqui Student Member, IEEE Abstract-- Parameters of power system models the influence of uncertainty in simulations of power system dynamic behaviour. It is shown that trajectory

  19. Geometric Wavelet Approximations and Abdourrahmane M. Atto1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Geometric Wavelet Approximations and Dierencing Abdourrahmane M. Atto1 , Emmanuel Trouve2 Jean-Marie Nicolas3 , Abstract--The paper introduces the concept of ge- ometric wavelets defined from multiplicative algebras. These wavelets perform generalized geometric approx- imations and differencing. The paper also

  20. A Study of Approximate Data Management Techniques for Sensor Networks

    E-Print Network [OSTI]

    Martin, Ralph R.

    the monitoring operation of sensor nodes by efficiently using their limited energy, bandwidth and computation. The network can therefore be treated as a distributed sensor data management system. Sensor networks differA Study of Approximate Data Management Techniques for Sensor Networks Adonis Skordylis, Niki

  1. Benchmarking a Scalable Approximate Dynamic Programming Algorithm for Stochastic Control

    E-Print Network [OSTI]

    Powell, Warren B.

    for the optimal control of such power systems are critical for the deployment of reliable and more economical and within 1.34% in stochastic ones, much lower than those obtained using model predictive control. We useBenchmarking a Scalable Approximate Dynamic Programming Algorithm for Stochastic Control

  2. Introduction Approximately 40% of rural Ethiopia (WaterAid, 2010)

    E-Print Network [OSTI]

    Walter, M.Todd

    Introduction Approximately 40% of rural Ethiopia (WaterAid, 2010) lacks access to clean water for water pumping is one alternative in the rural areas of Ethiopia since most of the population has technologies for water pumping in Ethiopia and especially in Amhara Region is limited. The promotion

  3. Combining Conjugate Direction Methods with Stochastic Approximation of Gradients

    E-Print Network [OSTI]

    Schraudolph, Nicol N.

    Combining Conjugate Direction Methods with Stochastic Approximation of Gradients #3; Nicol N-8092 Zurich, Switzerland http://www.icos.ethz.ch/ Abstract The method of conjugate directions provides from conjugate gra- dient in the stochastic (online) setting, us- ing fast Hessian-gradient products

  4. Combining Conjugate Direction Methods with Stochastic Approximation of Gradients

    E-Print Network [OSTI]

    Schraudolph, Nicol N.

    Combining Conjugate Direction Methods with Stochastic Approximation of Gradients Nicol N-8092 Z¨urich, Switzerland http://www.icos.ethz.ch/ Abstract The method of conjugate directions provides conjugate gra- dient in the stochastic (online) setting, us- ing fast Hessian-gradient products to set up

  5. APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD

    E-Print Network [OSTI]

    Tůma, Miroslav

    APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD ON A VECTOR COMPUTER Michele definite matrix, by the preconditioned conjugate gradient method (PCG) (see, e.g., [4]). It is well of the conjugate gradient method reduces to computing a matrix­ vector product with G, an operation which offers

  6. Fast approximation of the bootstrap for model selection

    E-Print Network [OSTI]

    Verleysen, Michel

    Fast approximation of the bootstrap for model selection G. Simon1 , A. Lendasse2 , V. Wertz2 , M. The bootstrap resampling method may be efficiently used to estimate the generalization error of a family with the bootstrap in real-world applications is the high computation load. In this paper we propose a simple

  7. Bootstrap for model selection: linear approximation of the optimism

    E-Print Network [OSTI]

    Verleysen, Michel

    Bootstrap for model selection: linear approximation of the optimism G. Simon1 , A. Lendasse2 , M. Lemaître 4, B-1348 Louvain-la-Neuve, Belgium, lendasse@auto.ucl.ac.be Abstract. The bootstrap resampling, as artificial neural networks. Nevertheless, the use of the bootstrap implies a high computational load

  8. Approximating many-body induction to efficiently describe molecular liquids

    E-Print Network [OSTI]

    Herbert, John

    on the structure and solvation dynamics of the excess electron (in the ground state) but does have a large impact as the structures and properties of molecular systems. This study focuses on approximating many-body electronic methods in order to allow "on-the-fly" energy and force evaluations in dynamical calculations

  9. 3-D cinematography with approximate and no geometry

    E-Print Network [OSTI]

    Magnor, Marcus

    3-D cinematography with approximate and no geometry Martin Eisemann, Timo Stich and Marcus Magnor Abstract 3-D cinematography is a new step towards full immersive video, allow- ing complete control of the book Image and Geometry Processing for 3-D Cinematography published by Springer. 1 Introduction

  10. A COMPUTATONAL METHOD FOR APPROXIMATING A DARCY-STOKES SYSTEM

    E-Print Network [OSTI]

    Arbogast, Todd

    of a second order elliptic (i.e., Darcy) equation on part of the domain coupled to a Stokes equation equation representing Darcy's law and mass conservation, and in the vugs s = \\ Żd by the Stokes equationA COMPUTATONAL METHOD FOR APPROXIMATING A DARCY-STOKES SYSTEM GOVERNING A VUGGY POROUS MEDIUM TODD

  11. Accelerating Search of Approximate Match on Large Protein Sequence Databases

    E-Print Network [OSTI]

    Wang, Wei

    of supporting indexed search on large biological sequence databases since the construction cost of the index Yang 2 , Yi Xia 3 , Philip Yu 4 Keywords: protein sequence index, approximate match. Due. Building an appropriate index structure is one of the possibilities to achieve such a goal, which

  12. Local RBF Approximation for Scattered Data Fitting with Bivariate Splines

    E-Print Network [OSTI]

    Davydov, Oleg

    and large scale optimization problems arising if the interpolating, smoothing or minimal energy spline in [5], a hybrid polynomial/radial basis scheme was considered in [4], where the local knot locations of radial basis functions, so defining hybrid approximations which are still computed by discrete least

  13. How Synchronisation Strategy Approximation in PEPA Implementations affects Passage Time

    E-Print Network [OSTI]

    Imperial College, London

    time densities and dis- tributions from stochastic models defined in PEPA, a stochastic process algebra. In stochastic process algebras, the synchronisation policy is important for defin- ing how different system;good approximation to underlying aggregate complex but deterministic dynamics or genuine random

  14. How Synchronisation Strategy Approximation in PEPA Implementations affects Passage Time

    E-Print Network [OSTI]

    Bradley, Jeremy

    passage time densities and dis­ tributions from stochastic models defined in PEPA, a stochastic process algebra. In stochastic process algebras, the synchronisation policy is important for defin­ ing how, or a #12; good approximation to underlying aggregate complex but deterministic dynamics or genuine random

  15. Aqua: A Fast Decision Support System Using Approximate Query Answers

    E-Print Network [OSTI]

    Gibbons, Phillip B.

    commercial relational DBMS. Aqua precomputes synopses (special sta- tistical summaries) of the original data and stores them in the DBMS. It provides approximate an- swers (with quality guarantees) by rewriting on top of any SQL- compliant DBMS managing a data warehouse. Aqua pre- computes statistical summaries

  16. Jitter-Approximation Tradeoff for Periodic Scheduling Zvika Brakerski

    E-Print Network [OSTI]

    Patt-Shamir, Boaz

    Jitter-Approximation Tradeoff for Periodic Scheduling Zvika Brakerski Dept. of Electrical the average period of a job in the schedule is blown up w.r.t. its requested period, and the jitter ratio with low jitter ratio allow the mobile devices to save power by hav- ing their receivers switched off

  17. NUMERICAL APPROXIMATION OF P-SYSTEMS WITH COULOMB FRICTIONAL DAMPING

    E-Print Network [OSTI]

    to the precise nature of the dissipation. Dry (Coulomb) friction is a limit case that has not been fully analyzed in the presence of dry ­ Coulomb­ friction. A model is described in detail in Section 2. A discretizationNUMERICAL APPROXIMATION OF P-SYSTEMS WITH COULOMB FRICTIONAL DAMPING KRISTY COFFEY AND PIERRE A

  18. Successive Rank-One Approximations of Nearly Orthogonally ...

    E-Print Network [OSTI]

    2015-03-01T23:59:59.000Z

    Mar 1, 2015 ... approximating SROA based on the power iteration method of [DLDMV00]. There ... perturbation E is sufficiently small (roughly on the order of 1/n under a natural measure). ... A real p-th order n-dimensional tensor ? ? ? p. R.

  19. Clustering With or Without the Approximation Frans Schalekamp

    E-Print Network [OSTI]

    Schalekamp, Frans

    Clustering With or Without the Approximation Frans Schalekamp ITCS, Tsinghua University Michael Yu MIT Anke van Zuylen ITCS, Tsinghua University Abstract We study algorithms for clustering data if we do not know values of and for which the assumption holds. Finally, we implement these methods

  20. Approximate Inference in Probabilistic Models Manfred Opper1

    E-Print Network [OSTI]

    of Electronics and Computer Science University of Southampton SO17 1BJ, United Kingdom mo@ecs.soton.ac.uk 2 on free energies. The free energy is constructed from two approximating distributions which encode differ Energy (GFE), an entropic quantity which (originally developed in Statistical Physics) allows us

  1. The Exemplar Breakpoint Distance for nontrivial genomes cannot be approximated

    E-Print Network [OSTI]

    Fertin, Guillaume

    The Exemplar Breakpoint Distance for non­trivial genomes cannot be approximated Guillaume Blin 1 ­ France guillaume.fertin@univ­nantes.fr Abstract. A promising and active field of comparative genomics con­ sists in comparing two genomes by establishing a one­to­one correspon­ dence (i.e., a matching) between

  2. Self-similar and charged spheres in the diffusion approximation

    E-Print Network [OSTI]

    W. Barreto; A. Da Silva

    2005-08-12T23:59:59.000Z

    We study spherical, charged and self--similar distributions of matter in the diffusion approximation. We propose a simple, dynamic but physically meaningful solution. For such a solution we obtain a model in which the distribution becomes static and changes to dust. The collapse is halted with damped mass oscillations about the absolute value of the total charge.

  3. Securely Computing an Approximate Median in Wireless Sensor Networks

    E-Print Network [OSTI]

    Setia, Sanjeev

    Securely Computing an Approximate Median in Wireless Sensor Networks Sankardas Roy 1 sroy1@gmu and the unattended nature of sensor nodes, sensor network protocols need to be designed with security in mind and efficient. Categories and Subject Descriptors C.2.0 [Computer-Communication Networks]: General- Security

  4. Also visit my online sites on Facebook www.facebook.com/ceceiliajill or LinkedIn www.linkedin.com/in/ceceilia about 20 hours ago via web

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    .linkedin.com/in/ceceilia about 20 hours ago via web Love the online Profile that ShannonKelly did in PennCareerServices @PennCareerDay http://ulife.vpul.upenn.edu/careerservices/blog/?cat=92 about 20 hours ago via web Looong drive out starting point. about 20 hours ago via web Time to go out and have fun but will continue to tweet

  5. Headed out to dinner now and signing off for the night. If you have questions, tweet me at @adachen!17 hours ago

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    's really come in handy over the last few years to reach out to ppl & learn 22 hours ago #BizTip: Add your

  6. An Improved Procedure for Developing a Calibrated Hourly Simulation Model of an Electrically Heated and Cooled Commercial Buildling 

    E-Print Network [OSTI]

    Bou-Saada, Tarek Edmond

    1994-01-01T23:59:59.000Z

    lighting, energy efficient heat pumps, a photovoltaic system, envelope measures, and a solar domestic water heating system. To accomplish this, a DOE-2 baseline model was calibrated to the measured hourly data and compared to a building model constructed... to unpredictable daily habits; for example opening or closing window blinds which have a direct impact on solar gains, or the inconsistent use of lights and office equipment. Tenant influence was also observed in Kaplan et al. (1990a) as reported in Section 2...

  7. Grade Classification Step Annual Monthly Hourly SUP 1 Utility Worker 1 $30,948 $2,579 $17.01

    E-Print Network [OSTI]

    Pulfrey, David L.

    Grade Classification Step Annual Monthly Hourly SUP 1 Utility Worker 1 $30,948 $2,579 $17.01 Food,859 $18.85 Study Tour Assistant 5 $35,508 $2,959 $19.51 SUP 2 Clerk 2 $32,016 $2,668 $17.59 Library Clerk 3 Clerk 3 $33,144 $2,762 $18.21 Facilities Services Worker 4 $34,308 $2,859 $18.85 Library Clerk

  8. Grade Classification Step Annual Monthly Hourly SUP 1 Utility Worker 1 $31,572 $2,631 $17.35

    E-Print Network [OSTI]

    Pulfrey, David L.

    Grade Classification Step Annual Monthly Hourly SUP 1 Utility Worker 1 $31,572 $2,631 $17.35 Food,916 $19.23 Study Tour Assistant 5 $36,216 $3,018 $19.90 SUP 2 Clerk 2 $32,652 $2,721 $17.94 Library Clerk 3 Clerk 3 $33,804 $2,817 $18.57 Facilities Services Worker 4 $34,992 $2,916 $19.23 Library Clerk

  9. The Library is open 24/5 Fall & Spring Summer hours vary -check lib.usf.edu

    E-Print Network [OSTI]

    Meyers, Steven D.

    The Library is open 24/5 Fall & Spring Summer hours vary - check lib.usf.edu After midnight, USF ID.lib.usf.edu/guides Teaching a Course? Learn how to integrate the library into Canvas Place items on reserve using PRESTO! Contact the library's Reserve Team at reserves@lib.usf.edu or 813-974-4182 Invite a librarian to join your

  10. Quantum optimal control within the rotating wave approximation

    E-Print Network [OSTI]

    Maximilian Keck; Matthias M. Müller; Tommaso Calarco; Simone Montangero

    2015-03-06T23:59:59.000Z

    We study the interplay between rotating wave approximation and optimal control. In particular, we show that for a wide class of optimal control problems one can choose the control field such that the Hamiltonian becomes time-independent under the rotating wave approximation. Thus, we show how to recast the functional minimization defined by the optimal control problem into a simpler multi-variable function minimization. We provide the analytic solution to the state-to-state transfer of the paradigmatic two-level system and to the more general star configuration of an $N$-level system. We demonstrate numerically the usefulness of this approach in the more general class of connected acyclic $N$-level systems with random spectra. Finally, we use it to design a protocol to entangle Rydberg via constant laser pulses atoms in an experimentally relevant range of parameters.

  11. On approximate controllability of generalized KdV solitons

    E-Print Network [OSTI]

    Claudio Muńoz

    2014-05-24T23:59:59.000Z

    We consider the approximate control of solitons in generalized Korteweg-de Vries equations. By introducing a suitable internal bilinear control on the equation, we prove that any soliton is locally null controllable, and moreover, any soliton can be accelerated to any particular positive velocity, after a suitable large amount of time. Precise estimates on the error terms and the rate of decay in the approximate null controllability result are also given. Our method introduces a new insight on the control of nonlinear objects, from the point of view of interaction and collision problems for nonlinear dispersive equations, recently developed by Y. Martel and F. Merle. It can be applied in principle, to several other models with soliton solutions.

  12. Quasielastic electron-deuteron scattering in the weak binding approximation

    SciTech Connect (OSTI)

    Ethier, Jacob J. [William and Mary College, JLAB; Doshi, Nidhi P. [Carnegie Mellon University; Malace, Simona P. [JLAB; Melnitchouk, Wally [JLAB

    2014-06-01T23:59:59.000Z

    We perform a global analysis of all available electron-deuteron quasielastic scattering data using Q^2-dependent smearing functions that describe inclusive inelastic e-d scattering within the weak binding approximation. We study the dependence of the cross sections on the deuteron wave function and the off-shell extrapolation of the elastic electron-nucleon cross section, which show particular sensitivity at x >> 1. The excellent overall agreement with data over a large range of Q^2 and x suggest a limited need for effects beyond the impulse approximation, with the exception of the very high-x or very low-Q^2 regions, where short-distance effects in the deuteron become more relevant.

  13. Exploring approximations to the GW self-energy ionic gradients

    E-Print Network [OSTI]

    Faber, C; Attaccalite, C; Cannuccia, E; Duchemin, I; Deutsch, T; Blase, X

    2015-01-01T23:59:59.000Z

    The accuracy of the many-body perturbation theory GW formalism to calculate electron-phonon coupling matrix elements has been recently demonstrated in the case of a few important systems. However, the related computational costs are high and thus represent strong limitations to its widespread application. In the present study, we explore two less demanding alternatives for the calculation of electron-phonon coupling matrix elements on the many-body perturbation theory level. Namely, we test the accuracy of the static Coulomb-hole plus screened-exchange (COHSEX) approximation and further of the constant screening approach, where variations of the screened Coulomb potential W upon small changes of the atomic positions along the vibrational eigenmodes are neglected. We find this latter approximation to be the most reliable, whereas the static COHSEX ansatz leads to substantial errors. Our conclusions are validated in a few paradigmatic cases: diamond, graphene and the C60 fullerene. These findings open the way f...

  14. On the Peterlin approximation for turbulent flows of polymer solutions

    E-Print Network [OSTI]

    Dario Vincenzi; Prasad Perlekar; Luca Biferale; Federico Toschi

    2015-05-26T23:59:59.000Z

    We study the impact of the Peterlin approximation on the statistics of the end-to-end separation of poly- mers in a turbulent flow. The FENE and FENE-P models are numerically integrated along a large number of Lagrangian trajectories resulting from a direct numerical simulation of three-dimensional homogeneous isotropic turbulence. Although the FENE-P model yields results in qualitative agreement with those of the FENE model, quantitative differences emerge. The steady-state probability of large extensions is overesti- mated by the FENE-P model. The alignment of polymers with the eigenvectors of the rate-of-strain tensor and with the direction of vorticity is weaker when the Peterlin approximation is used. At large Weissenberg numbers, both the correlation times of the extension and of the orientation of polymers are underestimated by the FENE-P model.

  15. On the Peterlin approximation for turbulent flows of polymer solutions

    E-Print Network [OSTI]

    Vincenzi, Dario; Biferale, Luca; Toschi, Federico

    2015-01-01T23:59:59.000Z

    We study the impact of the Peterlin approximation on the statistics of the end-to-end separation of poly- mers in a turbulent flow. The FENE and FENE-P models are numerically integrated along a large number of Lagrangian trajectories resulting from a direct numerical simulation of three-dimensional homogeneous isotropic turbulence. Although the FENE-P model yields results in qualitative agreement with those of the FENE model, quantitative differences emerge. The steady-state probability of large extensions is overesti- mated by the FENE-P model. The alignment of polymers with the eigenvectors of the rate-of-strain tensor and with the direction of vorticity is weaker when the Peterlin approximation is used. At large Weissenberg numbers, both the correlation times of the extension and of the orientation of polymers are underestimated by the FENE-P model.

  16. New Algorithms for Finding Approximate Frequent Item Sets

    E-Print Network [OSTI]

    Berthold, Michael R.

    New Algorithms for Finding Approximate Frequent Item Sets Christian Borgelt1 , Christian Braune1,2 , Tobias K¨otter3 and Sonja Gr¨un4,5 1 European Centre for Soft Computing c/ Gonzalo Guti´errez Quir´os s/n.borgelt@softcomputing.es, christian.braune@st.ovgu.de, tobias.koetter@uni-konstanz.de, s.gruen@fz-juelich.de Abstract. In standard

  17. Product-state Approximations to Quantum Ground States

    E-Print Network [OSTI]

    Fernando G. S. L. Brandăo; Aram W. Harrow

    2014-12-15T23:59:59.000Z

    The local Hamiltonian problem consists of estimating the ground-state energy (given by the minimum eigenvalue) of a local quantum Hamiltonian. First, we show the existence of a good product-state approximation for the ground-state energy of 2-local Hamiltonians with one or more of the following properties: (1) high degree, (2) small expansion, or (3) a ground state with sublinear entanglement with respect to some partition into small pieces. The approximation based on degree is a surprising difference between quantum Hamiltonians and classical CSPs (constraint satisfaction problems), since in the classical setting, higher degree is usually associated with harder CSPs. The approximation based on low entanglement, in turn, was previously known only in the regime where the entanglement was close to zero. Since the existence of a low-energy product state can be checked in NP, the result implies that any Hamiltonian used for a quantum PCP theorem should have: (1) constant degree, (2) constant expansion, (3) a "volume law" for entanglement with respect to any partition into small parts. Second, we show that in several cases, good product-state approximations not only exist, but can be found in polynomial time: (1) 2-local Hamiltonians on any planar graph, solving an open problem of Bansal, Bravyi, and Terhal, (2) dense k-local Hamiltonians for any constant k, solving an open problem of Gharibian and Kempe, and (3) 2-local Hamiltonians on graphs with low threshold rank, via a quantum generalization of a recent result of Barak, Raghavendra and Steurer. Our work introduces two new tools which may be of independent interest. First, we prove a new quantum version of the de Finetti theorem which does not require the usual assumption of symmetry. Second, we describe a way to analyze the application of the Lasserre/Parrilo SDP hierarchy to local quantum Hamiltonians.

  18. Studies in Interpolation and Approximation of Multivariate Bandlimited Functions 

    E-Print Network [OSTI]

    Bailey, Benjamin Aaron

    2012-10-19T23:59:59.000Z

    &M University in partial ful llment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Co-Chairs of Committee, Thomas Schlumprecht N. Sivakumar Committee Members, Joel Zinn William Johnson Fred Dahm Head of Department, Albert...{Chairs of Advisory Committee: Dr. Thomas Schlumprecht Dr. N. Sivakumar The focus of this dissertation is the interpolation and approximation of multi- variate bandlimited functions via sampled (function) values. The rst set of results investigates polynomial...

  19. Automating efficiency-targeted approximations in modelling and simulation tools: dynamic decoupling and mixed-mode

    E-Print Network [OSTI]

    Como, Giacomo

    Automating efficiency-targeted approximations in modelling and simulation tools: dynamic decoupling (classical) efficiency-targeted approximation tech- niques, within a unified framework. Some application

  20. Corrections to Eikonal Approximation for Nuclear Scattering at Medium Energies

    E-Print Network [OSTI]

    Micah Buuck; Gerald A. Miller

    2014-06-12T23:59:59.000Z

    The upcoming Facility for Rare Isotope Beams (FRIB) at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University has reemphasized the importance of accurate modeling of low energy nucleus-nucleus scattering. Such calculations have been simplified by using the eikonal approximation. As a high energy approximation, however, its accuracy suffers for the medium energy beams that are of current experimental interest. A prescription developed by Wallace \\cite{Wallace:1971zz,Wallace:1973iu} that obtains the scattering propagator as an expansion around the eikonal propagator (Glauber approach) has the potential to extend the range of validity of the approximation to lower energies. Here we examine the properties of this expansion, and calculate the first-, second-, and third-order corrections for the scattering of a spinless particle off of a ${}^{40}$Ca nucleus, and for nuclear breakup reactions involving ${}^{11}$Be. We find that, including these corrections extends the lower bound of the range of validity of the down to energies of 40 MeV. At that energy the corrections provide as much as a 15\\% correction to certain processes.

  1. The periodic standing-wave approximation: post-Minkowski computation

    E-Print Network [OSTI]

    Christopher Beetle; Benjamin Bromley; Napoleón Hernández; Richard H. Price

    2007-08-08T23:59:59.000Z

    The periodic standing wave method studies circular orbits of compact objects coupled to helically symmetric standing wave gravitational fields. From this solution an approximation is extracted for the strong field, slowly inspiralling motion of black holes and binary stars. Previous work on this model has dealt with nonlinear scalar models, and with linearized general relativity. Here we present the results of the method for the post-Minkowski (PM) approximation to general relativity, the first step beyond linearized gravity. We compute the PM approximation in two ways: first, via the standard approach of computing linearized gravitational fields and constructing from them quadratic driving sources for second-order fields, and second, by solving the second-order equations as an ``exact'' nonlinear system. The results of these computations have two distinct applications: (i) The computational infrastructure for the ``exact'' PM solution will be directly applicable to full general relativity. (ii) The results will allow us to begin supplying initial data to collaborators running general relativistic evolution codes.

  2. Formalising the Slow-Roll Approximation in Inflation

    E-Print Network [OSTI]

    Andrew R. Liddle; Paul Parsons; John D. Barrow

    1994-08-04T23:59:59.000Z

    The meaning of the inflationary slow-roll approximation is formalised. Comparisons are made between an approach based on the Hamilton-Jacobi equations, governing the evolution of the Hubble parameter, and the usual scenario based on the evolution of the potential energy density. The vital role of the inflationary attractor solution is emphasised, and some of its properties described. We propose a new measure of inflation, based upon contraction of the comoving Hubble length as opposed to the usual e-foldings of physical expansion, and derive relevant formulae. We introduce an infinite hierarchy of slow-roll parameters, and show that only a finite number of them are required to produce results to a given order. The extension of the slow-roll approximation into an analytic slow-roll expansion, converging on the exact solution, is provided. Its role in calculations of inflationary dynamics is discussed. We explore rational-approximants as a method of extending the range of convergence of the slow-roll expansion up to, and beyond, the end of inflation.

  3. Online Training Now Available -We are proud to offer EPA Accredited Lead-Safe Work Practices training online, which can take the place of the 6 hour classroom

    E-Print Network [OSTI]

    Tennessee, University of

    Online Training Now Available - We are proud to offer EPA Accredited Lead-Safe Work Practices training online, which can take the place of the 6 hour classroom instruction for the Lead RRP certification. Please note that a two hour hands-on training session is still required before you can obtain

  4. The French community Quantitative Precipitation Estimation (QPE) Re-analysis Project : Establishment of a reference multi-year, multi-source, nation-wide, hourly

    E-Print Network [OSTI]

    Boyer, Edmond

    distributed rainfall depths that are potentially more informative than traditional ground rain gauge networks (radars, hourly and daily rain gauges, satellite data, model freezing level heights, ...) to obtain combination of radar data with hourly and daily rain gauge network. First, methodology for automated

  5. Dynamics of false vacuum bubbles: beyond the thin shell approximation

    E-Print Network [OSTI]

    Jakob Hansen; Dong-il Hwang; Dong-han Yeom

    2009-11-08T23:59:59.000Z

    We numerically study the dynamics of false vacuum bubbles which are inside an almost flat background; we assumed spherical symmetry and the size of the bubble is smaller than the size of the background horizon. According to the thin shell approximation and the null energy condition, if the bubble is outside of a Schwarzschild black hole, unless we assume Farhi-Guth-Guven tunneling, expanding and inflating solutions are impossible. In this paper, we extend our method to beyond the thin shell approximation: we include the dynamics of fields and assume that the transition layer between a true vacuum and a false vacuum has non-zero thickness. If a shell has sufficiently low energy, as expected from the thin shell approximation, it collapses (Type 1). However, if the shell has sufficiently large energy, it tends to expand. Here, via the field dynamics, field values of inside of the shell slowly roll down to the true vacuum and hence the shell does not inflate (Type 2). If we add sufficient exotic matters to regularize the curvature near the shell, inflation may be possible without assuming Farhi-Guth-Guven tunneling. In this case, a wormhole is dynamically generated around the shell (Type 3). By tuning our simulation parameters, we could find transitions between Type 1 and Type 2, as well as between Type 2 and Type 3. Between Type 2 and Type 3, we could find another class of solutions (Type 4). Finally, we discuss the generation of a bubble universe and the violation of unitarity. We conclude that the existence of a certain combination of exotic matter fields violates unitarity.

  6. Compton scattering from positronium and validity of the impulse approximation

    SciTech Connect (OSTI)

    Kaliman, Z.; Pisk, K.; Pratt, R. H. [Department of Physics, University of Rijeka, Rijeka (Croatia); Rudjer Boskovic Institute, P. O. Box 180, Zagreb (Croatia) and University of Dubrovnik, Dubrovnik (Croatia); Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)

    2011-05-15T23:59:59.000Z

    The cross sections for Compton scattering from positronium are calculated in the range from 1 to 100 keV incident photon energy. The calculations are based on the A{sup 2} term of the photon-electron or photon-positron interaction. Unlike in hydrogen, the scattering occurs from two centers and the interference effect plays an important role for energies below 8 keV. Because of the interference, the criterion for validity of the impulse approximation for positronium is more restrictive compared to that for hydrogen.

  7. Dark Energy Regulation with Approximate Emergent Conformal Symmetry

    E-Print Network [OSTI]

    Yongsung Yoon

    2013-08-28T23:59:59.000Z

    A cosmic potential which can relax the vacuum energy is proposed in a framework of scalar-tensor gravity. In the phase of the gravity scalar field around the evolution with an approximate emergent conformal symmetry, we have obtained a set of cosmological equations with the dark energy regulated to the order of a conformal anomaly parameter. Through a role of the cosmic potential, the vacuum energy which could be generated in matter Lagrangian does not contribute to the dark energy in the phase.

  8. Gaussian approximation to the condensation of the interacting Bose gas

    E-Print Network [OSTI]

    Anna Okopi?ska

    2003-09-29T23:59:59.000Z

    The effective action formalism of quantum field theory is used to study the properties of the non-relativistic interacting Bose gas. The Gaussian approximation is formulated by calculating the effective action to the first order of the optimized expansion. In the homogeneous limit the method respects the Hughenholz-Pines theorem, leading to the gapless spectrum both for excitations and for density fluctuations. Renormalization is carried out by adopting dimensional regularization. The results for critical temperature are compared with that obtained in the loop expansion.

  9. Mirant: Case 67a: Units 3 & 4 & 5 at Max Load for 12 hours and at Min Load

    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 DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment3311,Official FileEnergyAERMOD-PRIME, Units 3, 1, 2for 12 hours

  10. Hardness of Approximate Hypergraph Coloring Venkatesan Guruswami Johan Hastad y Madhu Sudan z

    E-Print Network [OSTI]

    Guruswami, Venkatesan

    Hardness of Approximate Hypergraph Coloring Venkatesan Guruswami #3; Johan Hšastad y Madhu Sudan #3

  11. Approximation Theorems Related to the Coupon Collector's Problem

    E-Print Network [OSTI]

    Pósfai, Anna

    2010-01-01T23:59:59.000Z

    This Ph.D. thesis concerns the version of the classical coupon collector's problem, when a collector samples with replacement a set of $n\\ge 2$ distinct coupons so that at each time any one of the $n$ coupons is drawn with the same probability $1/n$. For a fixed integer $m\\in\\{0,1,\\ldots,n-1\\}$, the coupon collector's waiting time $W_{n,m}$ is the random number of draws the collector performs until he acquires $n-m$ distinct coupons for the first time. The basic goal of the thesis is to approximate the distribution of the coupon collector's appropriately centered and normalized waiting time with well-known measures with high accuracy, and in many cases prove asymptotic expansions for the related probability distribution functions and mass functions. The approximating measures are chosen from five different measure families. Three of them -- the Poisson distributions, the normal distributions and the Gumbel-like distributions -- are probability measure families whose members occur as limiting laws in the limit...

  12. Approximation Algorithms for Wireless Link Scheduling with Flexible Data Rates

    E-Print Network [OSTI]

    Kesselheim, Thomas

    2012-01-01T23:59:59.000Z

    We consider scheduling problems in wireless networks with respect to flexible data rates. That is, more or less data can be transmitted per time depending on the signal quality, which is determined by the signal-to-interference-plus-noise ratio (SINR). Each wireless link has a utility function mapping SINR values to the respective data rates. We have to decide which transmissions are performed simultaneously and (depending on the problem variant) also which transmission powers are used. In the capacity-maximization problem, one strives to maximize the overall network throughput, i.e., the summed utility of all links. For arbitrary utility functions (not necessarily continuous ones), we present an O(log n)-approximation when having n communication requests. This algorithm is built on a constant-factor approximation for the special case of the respective problem where utility functions only consist of a single step. In other words, each link has an individual threshold and we aim at maximizing the number of lin...

  13. 1.85 Approximation for Min-Power Strong Connectivity

    E-Print Network [OSTI]

    Calinescu, Gruia

    2012-01-01T23:59:59.000Z

    Given a directed simple graph G=(V,E) and a nonnegative-valued cost function the power of a vertex u in a directed spanning subgraph H is given by the maximum cost of an arcs of H exiting u. The power of H is the sum of the power of its vertices. Power Assignment seeks to minimize the power of H while H satisfies some connectivity constraint. In this paper, we assume E is bidirected (for every directed edge e in E, the opposite edge exists and has the same cost), while H is required to be strongly connected. This is the original power assignment problem introduced by Chen and Huang in 1989, who proved that bidirected minimum spanning tree has approximation ratio at most 2 (this is tight). In Approx 2010, we introduced a Greedy approximation algorithm and claimed a ratio of 1.992. Here we improve the analysis to 1.85. The proof also shows that a natural linear programming relaxation, introduced by us in 2012, has the same 1.85 integrality gap.

  14. Cluster Before You Hallucinate: Approximating Node-Capacitated Network Design and Energy Efficient Routing

    E-Print Network [OSTI]

    Treuille, Adrien

    )-approximate with O(log4 n) congestion. This translates back to a O(log4+3 n)-approximation for the multicast energy-minimization)-approximate with O(log12 n) congestion, which translates back to a O(log12+5 n)-approximation for the unicast energy-minimizationCluster Before You Hallucinate: Approximating Node-Capacitated Network Design and Energy Efficient

  15. Approximate Weighted Matching On Emerging Manycore and Multithreaded Architectures

    SciTech Connect (OSTI)

    Halappanavar, Mahantesh; Feo, John T.; Villa, Oreste; Tumeo, Antonino; Pothen, Alex

    2012-11-30T23:59:59.000Z

    Graph matching is a prototypical combinatorial problem with many applications in computer science and scientific computing, but algorithms for computing optimal matchings are challenging to parallelize. Approximate matching algorithms provide an alternate route for parallelization, and in many contexts compute near-optimal matchings for large-scale graphs. We present sharedmemory parallel implementations for computing half-approximate weighted matching on state-of-the-art multicore (Intel Nehalem and AMD Magny-Cours), manycore (Nvidia Tesla and Nvidia Fermi) and massively multithreaded (Cray XMT) platforms. We provide two implementations: the first implementation uses shared work queues, and is suited to all these platforms; the second implementation is based on dataflow principles, and exploits the architectural features of the Cray XMT. Using a carefully chosen dataset that exhibits characteristics from a wide range of real-world applications, we show scalable performance across different platforms. In particular, for one instance of the input, an R-MAT graph (RMAT-G), we show speedups of: about 32 on 48 cores of an AMD Magny-Cours; 7 on 8 cores of Intel Nehalem; 3 on Nvidia Tesla and 10 on Nvidia Fermi relative to one core of Intel Nehalem; and 60 on 128 processors of Cray XMT. We demonstrate good weak and strong scaling for graphs with up to a billion edges using up to 12, 800 threads. Given the breadth of this work, we focus on simplicity and portability of software rather than excessive fine-tuning for each platform. To the best of our knowledge, this is the first such large-scale study of the half-approximate weighted matching problem on shared-memory platforms. Driven by the critical enabling role of combinatorial algorithms such as matching in scientific computing and the emergence of informatics applications, there is a growing demand to support irregular computations on current and future computing platforms. In this context, we evaluate the capability of emerging multithreaded platforms to tolerate latency induced by irregular memory access patterns, and to support fine-grained parallelism via light-weight synchronization mechanisms. By contrasting the architectural features of these platforms against the Cray XMT, which is specifically designed to support irregular memory-intensive applications, we delineate the impact of these choices on performance.

  16. Approximate Message Passing with Restricted Boltzmann Machine Priors

    E-Print Network [OSTI]

    Tramel, Eric W; Krzakala, Florent

    2015-01-01T23:59:59.000Z

    Approximate Message Passing (AMP) has been shown to be an excellent statistical approach to signal inference and compressed sensing problem. The AMP framework provides modularity in the choice of signal prior; here we propose a hierarchical form of the Gauss-Bernouilli prior which utilizes a Restricted Boltzmann Machine (RBM) trained on the signal support to push reconstruction performance beyond that of simple iid priors for signals whose support can be well represented by a trained binary RBM. We present and analyze two methods of RBM factorization and demonstrate how these affect signal reconstruction performance within our proposed algorithm. Finally, using the MNIST handwritten digit dataset, we show experimentally that using an RBM allows AMP to approach oracle-support performance.

  17. Fast quantum algorithms for approximating some irreducible representations of groups

    E-Print Network [OSTI]

    Stephen P. Jordan

    2009-04-21T23:59:59.000Z

    We consider the quantum complexity of estimating matrix elements of unitary irreducible representations of groups. For several finite groups including the symmetric group, quantum Fourier transforms yield efficient solutions to this problem. Furthermore, quantum Schur transforms yield efficient solutions for certain irreducible representations of the unitary group. Beyond this, we obtain poly(n)-time quantum algorithms for approximating matrix elements from all the irreducible representations of the alternating group A_n, and all the irreducible representations of polynomial highest weight of U(n), SU(n), and SO(n). These quantum algorithms offer exponential speedup in worst case complexity over the fastest known classical algorithms. On the other hand, we show that average case instances are classically easy, and that the techniques analyzed here do not offer a speedup over classical computation for the estimation of group characters.

  18. Particle-particle random phase approximation applied to Beryllium isotopes

    E-Print Network [OSTI]

    Guillaume Blanchon; Nicole Vinh Mau; Angela Bonaccorso; Marc Dupuis; Nathalie Pillet

    2010-07-16T23:59:59.000Z

    This work is dedicated to the study of even-even 8-14 Be isotopes using the particle-particle Random Phase Approximation that accounts for two-body correlations in the core nucleus. A better description of energies and two-particle amplitudes is obtained in comparison with models assuming a neutron closed-shell (or subshell) core. A Wood-Saxon potential corrected by a phenomenological particle-vibration coupling term has been used for the neutron-core interaction and the D1S Gogny force for the neutron-neutron interaction. Calculated ground state properties as well as excited state ones are discussed and compared to experimental data. In particular, results suggest the same 2s_1/2-1p_1/2 shell inversion in 13Be as in 11Be.

  19. Pion - Nucleon Bremsstrahlung beyond the Soft-Photon approximation

    E-Print Network [OSTI]

    A. Mariano

    2000-04-06T23:59:59.000Z

    A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction $ \\pi N \\to \\pi N \\gamma$ at low energies. The $\\Delta(1232)$ degrees of freedom are incorporated in a way consistent with both, electromagnetic gauge invariance and invariance under contact transformations. The model also includes the initial and final state rescattering of hadrons via a T-matrix with off the momentum-shell effects. The double differential distribution of photons is computed for three different T-matrix models and the results are compared with the soft photon approximation, and with experimental data. The aim of this analysis is to test the off-shell behaviour of the different T-matrices under consideration. Finally an alternative simpler dynamical model that incorporates the unstable character of the isobar-$\\Delta(1232)$ through a complex mass, is presented. As we will see it is suitable for the study of the magnetic moment of the resonance.

  20. Shear Viscosity in the Post-quasistatic Approximation

    E-Print Network [OSTI]

    C. Peralta; L. Rosales; B. Rodrí guez-Mueller; W. Barreto

    2010-04-20T23:59:59.000Z

    We apply the post-quasi--static approximation, an iterative method for the evolution of self-gravitating spheres of matter, to study the evolution of anisotropic non-adiabatic radiating and dissipative distributions in General Relativity. Dissipation is described by viscosity and free-streaming radiation, assuming an equation of state to model anisotropy induced by the shear viscosity. We match the interior solution, in non-comoving coordinates, with the Vaidya exterior solution. Two simple models are presented, based on the Schwarzschild and Tolman VI solutions, in the non--adiabatic and adiabatic limit. In both cases the eventual collapse or expansion of the distribution is mainly controlled by the anisotropy induced by the viscosity.

  1. Relativistic Coulomb excitation within Time Dependent Superfluid Local Density Approximation

    E-Print Network [OSTI]

    I. Stetcu; C. Bertulani; A. Bulgac; P. Magierski; K. J. Roche

    2015-01-13T23:59:59.000Z

    Within the framework of the unrestricted time-dependent density functional theory, we present for the first time an analysis of the relativistic Coulomb excitation of the heavy deformed open shell nucleus $^{238}$U. The approach is based on Superfluid Local Density Approximation (SLDA) formulated on a spatial lattice that can take into account coupling to the continuum, enabling self-consistent studies of superfluid dynamics of any nuclear shape. We have computed the energy deposited in the target nucleus as a function of the impact parameter, finding it to be significantly larger than the estimate using the Goldhaber-Teller model. The isovector giant dipole resonance, the dipole pygmy resonance and giant quadrupole modes were excited during the process. The one body dissipation of collective dipole modes is shown to lead a damping width $\\Gamma_\\downarrow \\approx 0.4$ MeV and the number of pre-equilibrium neutrons emitted has been quantified.

  2. Comparison of Average Heart Rates Determined by Surface ECG and 24-Hour Ambulatory ECG (Holter) in Dogs with Spontaneous Atrial Fibrillation

    E-Print Network [OSTI]

    Perea Lugo, Adriana

    2012-02-14T23:59:59.000Z

    The purpose of this study was to compare the heart rates of dogs presenting with spontaneous atrial fibrillation (AF) by a surface electrocardiogram (ECG) and a 24 hour ambulatory ECG (Holter recording) in order to determine if there was a...

  3. In this two hour course we get right to the point in sharing practical concrete information on: weight loss, carbohydrate and blood sugar control, dietary fat

    E-Print Network [OSTI]

    Chapman, Michael S.

    In this two hour course we get right to the point in sharing practical concrete information on located under the Physicians Pavilion. After you park your car take the elevator up to the first floor

  4. In this two hour course we get right to the point in sharing practical concrete information on: weight loss, carbohydrate and blood sugar control, dietary fat

    E-Print Network [OSTI]

    Chapman, Michael S.

    In this two hour course we get right to the point in sharing practical concrete information on parking is available in the parking garage located under the Physicians Pavilion. After you park your car

  5. Program Overview Contact hours

    E-Print Network [OSTI]

    Â?umer, Slobodan

    ) (Research for master's thesis.) B. Mavko mentor 2 Radioactive waste and (6 ECTS) decommissioning of nuclear to understand and control processes in the nuclear reactor core.) A. Trkov 1 Nuclear thermalhydraulics (6 ECTS) (Understanding and modeling of thermal-hydraulic processes in systems of nuclear power plants. Understanding

  6. Temporary Hourly Archaeological Field

    E-Print Network [OSTI]

    'ahu, Hawaii are available with the Center for Environmental Management of Military Lands (CEMML). Applicants). CEMML applies the latest and most appropriate science to promote the sustainable management of natural records of all work completed as well as detailed site recording of all archaeological sites encountered

  7. Fulfilled by Hours Earned

    E-Print Network [OSTI]

    Kasman, Alex

    : Applied Communication Concentration AND OR Humanities: Choose one from each category Social Sciences) Psychology/Sociology/Anthropology/Political Science/Economics/Geography Psychology/Sociology/Anthropology/Political Science/Economics/Geography Chemistry/Physics/Biology/Astronomy/Geology Chemistry

  8. Contacts / Hours - Hanford Site

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGas SeparationsRelevant toSite MapContact UsP-27 Group

  9. Allocation of Flight Hours

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973ManagedStrategic|Aljazeera story onImagingAllenAllocation

  10. A 1:52-Approximation Algorithm for the Uncapacitated Facility Location Problem

    E-Print Network [OSTI]

    Ye, Yinyu

    A 1:52-Approximation Algorithm for the Uncapacitated Facility Location Problem Mohammad Mahdian #3: Approximation Algorithms for UFLP 2 Algorithm In [5], Jain, Mahdian, and Saberi proposed a greedy algorithm

  11. Gaussian approximations and multiplier bootstrap for maxima of sums of high-dimensional random vectors

    E-Print Network [OSTI]

    Chetverikov, Denis

    We derive a Gaussian approximation result for the maximum of a sum of high-dimensional random vectors. Specifically, we establish conditions under which the distribution of the maximum is approximated by that of the maximum ...

  12. Moment Closure Approximations in a Genetic Negative Feedback Circuit

    E-Print Network [OSTI]

    Mohammad Soltani; Cesar Vargas; Niraj Kumar; Rahul Kulkarni; Abhyudai Singh

    2014-05-15T23:59:59.000Z

    Auto-regulation, a process wherein a protein negatively regulates its own production, is a common motif in gene expression networks. Negative feedback in gene expression plays a critical role in buffering intracellular fluctuations in protein concentrations around optimal value. Due to the nonlinearities present in these feedbacks, moment dynamics are typically not closed, in the sense that the time derivative of the lower-order statistical moments of the protein copy number depends on high-order moments. Moment equations are closed by expressing higher-order moments as nonlinear functions of lower-order moments, a technique commonly referred to as moment closure. Here, we compare the performance of different moment closure techniques. Our results show that the commonly used closure method, which assumes a priori that the protein population counts are normally distributed, performs poorly. In contrast, conditional derivative matching, a novel closure scheme proposed here provides a good approximation to the exact moments across different parameter regimes. In summary our study provides a new moment closure method for studying stochastic dynamics of genetic negative feedback circuits, and can be extended to probe noise in more complex gene networks.

  13. Energy loss and (de)coherence effects beyond eikonal approximation

    E-Print Network [OSTI]

    Liliana Apolinário; Néstor Armesto; Guilherme Milhano; Carlos A. Salgado

    2014-10-21T23:59:59.000Z

    The parton branching process is known to be modified in the presence of a medium. Colour decoherence processes are known to determine the process of energy loss when the density of the medium is large enough to break the correlations between partons emitted from the same parent. In order to improve existing calculations that consider eikonal trajectories for both the emitter and the hardest emitted parton, we provide in this work, the calculation of all finite energy corrections for the gluon radiation off a quark in a QCD medium that exist in the small angle approximation and for static scattering centres. Using the path integral formalism, all particles are allowed to undergo Brownian motion in the transverse plane and the offspring allowed to carry an arbitrary fraction of the initial energy. The result is a general expression that contains both coherence and decoherence regimes that are controlled by the density of the medium and by the amount of broadening that each parton acquires independently.

  14. 3D Scattered Data Approximation with Adaptive Compactly Supported Radial Basis Functions

    E-Print Network [OSTI]

    Kazhdan, Michael

    ¾ ¼ ½ indicating the confidence of � . Our aim is to construct a function Ý ´�µ such that its zero level-set ´�µ , � �, we construct ´�µ approximating � in the follow- ing form suggested in [27] ¾ ´�µ · ´ � µ approximation of �. For each approximation center , we construct ´�µ as a local quadratic approximation of �

  15. Matrix multiplication over word-size prime fields using Bini's approximate formula

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Matrix multiplication over word-size prime fields using Bini's approximate formula Brice Boyer Jean-Guillaume Dumas Abstract Bini's approximate formula (or border rank) for matrix multiplication achieves a better the approximate formula in the special case where the ring is Z/pZ. Besides, we show an implemen- tation ŕ la

  16. PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation

    E-Print Network [OSTI]

    Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

    PD Dr. Martin Stetter, Siemens AG 1 Lernen von Datenmodellen: Approximation · Bayes`sches Schließen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 2 Ziel maschinellen Lernens (=statistische Inferenz) · Man Datenmodellen: Approximation #12;PD Dr. Martin Stetter, Siemens AG 3 Bayes`sches Schließen · Es gilt, die Daten

  17. Motivation Green's functions The GW Approximation The Bethe-Salpeter Equation Introduction to Green's functions

    E-Print Network [OSTI]

    Botti, Silvana

    Motivation Green's functions The GW Approximation The Bethe-Salpeter Equation Introduction to Green=whiteMotivation Green's functions The GW Approximation The Bethe-Salpeter Equation Outline 1 Motivation 2 Green's functions 3 The GW Approximation 4 The Bethe-Salpeter Equation #12;bg=whiteMotivation Green's functions

  18. Convergence of the Approximation Scheme to American Option Pricing via the Discrete Morse Semiflow

    SciTech Connect (OSTI)

    Ishii, Katsuyuki, E-mail: ishii@maritime.kobe-u.ac.jp [Kobe University, Graduate School of Maritime Sciences (Japan); Omata, Seiro, E-mail: omata@kenroku.kanazawa-u.ac.jp [Kanazawa University, School of Mathematics and Physics, Institute of Science and Engineering (Japan)

    2011-12-15T23:59:59.000Z

    We consider the approximation scheme to the American call option via the discrete Morse semiflow, which is a minimizing scheme of a time semi-discretized variational functional. In this paper we obtain a rate of convergence of approximate solutions and the convergence of approximate free boundaries. We mainly apply the theory of variational inequalities and that of viscosity solutions to prove our results.

  19. Markov Jump Processes Approximating a Non-Symmetric Generalized Diffusion

    SciTech Connect (OSTI)

    Limic, Nedzad, E-mail: nlimic@math.hr [University of Zagreb, Dept. of Mathematics (Croatia)

    2011-08-15T23:59:59.000Z

    Consider a non-symmetric generalized diffusion X( Dot-Operator ) in Double-Struck-Capital-R {sup d} determined by the differential operator A(x) = -{Sigma}{sub ij} {partial_derivative}{sub i}a{sub ij}(x){partial_derivative}{sub j} + {Sigma}{sub i} b{sub i}(x){partial_derivative}{sub i}. In this paper the diffusion process is approximated by Markov jump processes X{sub n}( Dot-Operator ), in homogeneous and isotropic grids G{sub n} Subset-Of Double-Struck-Capital-R {sup d}, which converge in distribution in the Skorokhod space D([0,{infinity}), Double-Struck-Capital-R {sup d}) to the diffusion X( Dot-Operator ). The generators of X{sub n}( Dot-Operator ) are constructed explicitly. Due to the homogeneity and isotropy of grids, the proposed method for d{>=}3 can be applied to processes for which the diffusion tensor {l_brace}a{sub ij}(x){r_brace}{sub 11}{sup dd} fulfills an additional condition. The proposed construction offers a simple method for simulation of sample paths of non-symmetric generalized diffusion. Simulations are carried out in terms of jump processes X{sub n}( Dot-Operator ). For piece-wise constant functions a{sub ij} on Double-Struck-Capital-R {sup d} and piece-wise continuous functions a{sub ij} on Double-Struck-Capital-R {sup 2} the construction and principal algorithm are described enabling an easy implementation into a computer code.

  20. The materials listed below are housed in the Special Collections Department at CU-Boulder. Special Collections has limited hours of operation. Please call 303.492.6144 to confirm prior to visiting or email spc@colorado.edu.

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    Collections has limited hours of operation. Please call 303.492.6144 to confirm prior to visiting or email spc

  1. 1. I look forward to meeting anyone who is interested in working for an environmental advocacy group this Friday at the career fair.about 16 hours ago via Mobile Web

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    group this Friday at the career fair.about 16 hours ago via Mobile Web 2. I hope that everyone enjoyed hearing about a day of my life as an environmental advocate.about 16 hours ago via Mobile Web 3. Now via Mobile Web 4. Writing follow up emails to everyone I spoke with today.about 17 hours ago via

  2. Have a great night everyone. Bye!!! --Mel (@mkramer) about 19 hours ago via web We don't have internships but NPR does: http://www.npr.org/about/careers/internships.html

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Have a great night everyone. Bye!!! -- Mel (@mkramer) about 19 hours ago via web We don't have 19 hours ago via web Our website is http://freshair.npr.org and our tumblr is http://nprfreshair.tumblr.com about 19 hours ago via web I'm melodykramer AT gmail DOT com. My twitter handle is @mkramer. The show

  3. Pulmonary function and symptom responses after 6. 6-hour exposure to 0. 12-ppm ozone with moderate exercise (journal version)

    SciTech Connect (OSTI)

    Folinsbee, L.J.; Horstman, D.H.; McDonnell, W.F.

    1988-01-01T23:59:59.000Z

    Episodes occasionally occur when ambient ozone (O/sub 3/) levels remain at or near 0.12 ppm for more than 6 h. The hypothesis that prolonged exposure to 0.12 ppm O/sub 3/ would result in progressively larger changes in respiratory function and symptoms over time was tested. Ten nonsmoking males (18-35 yr) were exposed once to clear air (CA) and once to 0.12 pp, O/sub 3/ for 6.75 h. Exposures consisted of six 50-min exercise periods, each followed by 10-min rest and measurement; a 45-min lunch period followed the third exercise period. Exercise ventilation averaged approximately 40 1/min. Forced expiratory and inspiratory spirometry and respiratory symptoms were measured prior to exposure and after each exercise. Increases in the symptom ratings of cough and pain on deep inspiration were observed with O/sub 3/ exposure but not with CA. Airway reactivity to methacholine was approximately doubled following O/sub 3/ exposure. Spirometry results indicate that prolonged exposure to 0.12 ppm O/sub 3/ results in a marked increase in non-specific airway reactivity and progressive changes in respiratory function.

  4. Pulmonary function and symptom responses after 6. 6-hour exposure to 0. 12 ppm ozone with moderate exercise

    SciTech Connect (OSTI)

    Folinsbee, L.J.; McDonnell, W.F.; Horstman, D.H.

    1988-01-01T23:59:59.000Z

    Episodes occasionally occur when ambient ozone (O/sub 3/) levels remain at or near 0.12 ppm for more than 6 h. Small decrements in lung function have been reported following 2-h exposures to 0.12 ppm O/sub 3/. For short exposures to higher O/sub 3/ concentrations, lung function decrements are a function of exposure duration. Thus, we investigated the hypothesis that prolonged exposure to 0.12 ppm O/sub 3/ would result in progressively larger changes in respiratory function and symptoms over time. Ten nonsmoking males were exposed once to clean air and once to 0.12 ppm O/sub 3/ for 6.6 h. Exposures consisted of six 50-min exercise periods, each followed by 10-min rest and measurement; a 35-min lunch period followed by the third exercise period. Exercise ventilation averaged approximately 40 L/min. Forced expiratory and inspiratory spirometry and respiratory symptoms were measured prior to exposure and after each exercise. Airway reactivity to methacholine was determined after each exposure. After correcting for the air exposures, FEV 1.0 was found to decrease linearly during the O/sub 3/ exposure and was decreased by an average of 13.0 percent at the end of exposure. Decreases in FVC and FEF24-75% were also linear and averaged 8.3 and 17.4 percent, respectively, at the end of exposure. On forced inspiratory tests, the FIVC and FIV05 were decreased 12.6 and 20.7 percent, respectively. Increases in the symptom ratings of cough and pain on deep inspiration were observed with O/sub 3/ exposure but not with clean air. Airway reactivity to methacholine was approximately doubled following O/sub 3/ exposure.

  5. A quasi-Gaussian approximation for the probability distribution of correlation functions

    E-Print Network [OSTI]

    Wilking, Philipp

    2013-01-01T23:59:59.000Z

    Context. Whenever correlation functions are used for inference about cosmological parameters in the context of a Bayesian analysis, the likelihood function of correlation functions needs to be known. Usually, it is approximated as a multivariate Gaussian, though this is not necessarily a good approximation. Aims. We show how to calculate a better approximation for the probability distribution of correlation functions, which we call "quasi-Gaussian". Methods. Using the exact univariate PDF as well as constraints on correlation functions previously derived, we transform the correlation functions to an unconstrained variable for which the Gaussian approximation is well justified. From this Gaussian in the transformed space, we obtain the quasi-Gaussian PDF. The two approximations for the probability distributions are compared to the "true" distribution as obtained from simulations. Additionally, we test how the new approximation performs when used as likelihood in a toy-model Bayesian analysis. Results. The quas...

  6. A comparison of networked approximators in parallel mode identification of a bioreactor

    E-Print Network [OSTI]

    Efe, Mehmet Önder

    A comparison of networked approximators in parallel mode identification of a bioreactor Mehmet 2010 Keywords: Bioreactor Identification Multilayer perceptron ANFIS Support vector machine Chemical

  7. A complete analytic inversion of supernova lines in the Sobolev approximation

    E-Print Network [OSTI]

    Kasen, Daniel; Branch, David; Baron, E.; Jeffery, David

    2001-01-01T23:59:59.000Z

    D . & Branch, D . 1990, in Supernovae, ed. J . C . Wheeler &radia­ tive transfer — supernovae Lawrence Berkeley Nationalgradients, such as supernovae. The Sobolev approximation has

  8. Quality of pork for the processing into cooked ham : Predictive value of the measurement of meat pH 24 hours post-mortem

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    control of product salubrity and cold storage chain is performed, as well. As regards the persistency Recherche Appliquée aux Industries Agricoles et Alimentaires, 6, rue de l'Université, B.P. 313, 29191 compatible with industrial rates of slaughtering and manufacturing of cooked ham (at least 300 pigs per hour

  9. University of Pittsburgh Test Center Registration Form Exams are by appointment only. Test center hours vary. Please call 412-624-6134 to schedule. Valid ID must

    E-Print Network [OSTI]

    Sibille, Etienne

    University of Pittsburgh Test Center Registration Form Exams are by appointment only. Test center hours vary. Please call 412-624-6134 to schedule. Valid ID must be presented at the time of the exam. Mail completed form and Test Center fee to address below. Once payment is received you

  10. Campus Crusade for Christ sponsors the nationally-financed PORN NATION, a one-hour multimedia event of faith-based testimony by

    E-Print Network [OSTI]

    Gleeson, Joseph G.

    Campus Crusade for Christ sponsors the nationally-financed PORN NATION, a one-hour multimedia event of the American media. Leahy supplements this PORN NATION show with lectures at Baptist churches on the "maintenance of sexual purity and integrity." PORN and the Chris ian NATION Wedge Is sex inherently SINFUL

  11. AFTER HOURS CARE Coulter Student Health Center is open 8:00 am to 12:00 pm and 1:00

    E-Print Network [OSTI]

    AFTER HOURS CARE Coulter Student Health Center is open 8:00 am to 12:00 pm and 1:00 pm to 4:45 pm applicable co-pays/co- insurance and deductibles when accessing care outside of the Health Center. URGENT, Monday through Friday. The Health Center is closed Saturday and Sundays, and during official CSM holidays

  12. Fig. 1. One hour measured irradiance and wind speed data with 0.2 seconds, 3 seconds and 1 minute (interpolated) sampling time.

    E-Print Network [OSTI]

    Sera, Dezso

    Fig. 1. One hour measured irradiance and wind speed data with 0.2 seconds, 3 seconds and 1 minute to intermittent character of the solar irradiance and wind. The actual power quality standards provide only of the solar irradiance and wind speed in fast changing conditions on the utility grid. This work proposes

  13. TRAVEL ACCIDENT INSURANCE PLAN 01-01-2012 The Travel Accident Insurance Plan provides 24-hour Accident coverage while on Authorized

    E-Print Network [OSTI]

    Johnson, Peter D.

    1 TRAVEL ACCIDENT INSURANCE PLAN 01-01-2012 The Travel Accident Insurance Plan provides 24-hour Accident coverage while on Authorized Business Travel. Coverage begins at the actual starting point. Please note that the Employer reserves the right to amend or terminate this Travel Accident Insurance

  14. After-hours power status of office equipment and energy use of miscellaneous plug-load equipment

    SciTech Connect (OSTI)

    Roberson, Judy A.; Webber, Carrie A.; McWhinney, Marla C.; Brown, Richard E.; Pinckard, Marageret J.; Busch, John F.

    2004-05-27T23:59:59.000Z

    This research was conducted in support of two branches of the EPA ENERGY STAR program, whose overall goal is to reduce, through voluntary market-based means, the amount of carbon dioxide emitted in the U.S. The primary objective was to collect data for the ENERGY STAR Office Equipment program on the after-hours power state of computers, monitors, printers, copiers, scanners, fax machines, and multi-function devices. We also collected data for the ENERGY STAR Commercial Buildings branch on the types and amounts of miscellaneous plug-load equipment, a significant and growing end use that is not usually accounted for by building energy managers. For most types of miscellaneous equipment, we also estimated typical unit energy consumption in order to estimate total energy consumption of the miscellaneous devices within our sample. This data set is the first of its kind that we know of, and is an important first step in characterizing miscellaneous plug loads in commercial buildings. The main purpose of this study is to supplement and update previous data we collected on the extent to which electronic office equipment is turned off or automatically enters a low power state when not in active use. In addition, it provides data on numbers and types of office equipment, and helps identify trends in office equipment usage patterns. These data improve our estimates of typical unit energy consumption and savings for each equipment type, and enables the ENERGY STAR Office Equipment program to focus future effort on products with the highest energy savings potential. This study expands our previous sample of office buildings in California and Washington DC to include education and health care facilities, and buildings in other states. We report data from sixteen commercial buildings in California, Georgia, and Pennsylvania: four education buildings, two medical buildings, two large offices (> 500 employees each), three medium offices (50-500 employees each), and five small business offices (< 50 employees each). Two buildings are in the San Francisco Bay are a of California, nine (including the five small businesses) are in Pittsburgh, Pennsylvania, and five are in Atlanta, Georgia.

  15. A New Approximation Scheme for the Group Steiner Problem C. S. Helvig Gabriel Robins Alexander Zelikovsky

    E-Print Network [OSTI]

    Zelikovsky, Alexander

    correspond to a group of up to eight nodes in the Group #3; This work was supported by a Packard Foundation a group of up to eight virtual positions (c). The only existing approximation algorithms for the GroupA New Approximation Scheme for the Group Steiner Problem #3; C. S. Helvig Gabriel Robins Alexander

  16. Logic-Based Outer-Approximation Algorithm for Solving Discrete-Continuous Dynamic

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    In this work we present an extension of the Logic Outer-Approximation algorithm for deal- ing with disjunctive.e. the control actions) may involve logic decisions that can be modeled as disjunctions [16], [17] giving riseLogic-Based Outer-Approximation Algorithm for Solving Discrete-Continuous Dynamic Optimization

  17. LOW DIMENSIONAL POLYTOPE APPROXIMATION AND ITS APPLICATIONS TO NONNEGATIVE MATRIX FACTORIZATION

    E-Print Network [OSTI]

    factorization is recast as the problem of approximating a polytope on the probability simplex by another polytope with fewer facets. Working on the probability simplex has the advantage that data are limited, polytope approximation, probability simplex, supporting hyper- plane, Hahn-Banach theorem 1. Introduction

  18. On Computation of Approximate Joint Block-Diagonalization using Ordinary AJD

    E-Print Network [OSTI]

    Yeredor, Arie

    On Computation of Approximate Joint Block-Diagonalization using Ordinary AJD Petr TichavskĂ˝ 1 2, 461 17 Liberec, Czech Republic Abstract. Approximate joint block diagonalization (AJBD) of a set, we prove that when the set is exactly jointly block-diagonalizable, perfect block

  19. 24 IEEE TRANSACTIONS ON NEURAL NETWORKS, VOL. 16, NO. 1, JANUARY 2005 Smooth Function Approximation Using

    E-Print Network [OSTI]

    Ferrari, Silvia

    , have become standard tools in regression and signal analysis involving input spaces with up to three di dimensional spaces [7]. For example, the majority of spline-based solutions for multivariate approximation- mensions [3]­[6]. However, much of univariate approximation theory does not generalize well to higher

  20. Wavelet-Based Piecewise Approximation of Steady-State Waveforms for

    E-Print Network [OSTI]

    Tse, Chi K. "Michael"

    Wavelet-Based Piecewise Approximation of Steady-State Waveforms for Power Electronics Circuits Kam Kong Polytechnic University, Hong Kong http://chaos.eie.polyu.edu.hk Abstract-- Wavelet transform has to maximize computational efficiency. In this paper, instead of applying one wavelet approximation

  1. What is Concurrent Programming? Course Outline (Approximate) Evaluation & Deadlines Engineering 9869

    E-Print Network [OSTI]

    Peters, Dennis

    What is Concurrent Programming? Course Outline (Approximate) Evaluation & Deadlines Engineering 9869 Advanced Concurrent Programming Introduction Dennis Peters1 Fall 2007 1 Throughout this course I will be borrowing from Dr. Theo Norvell #12;What is Concurrent Programming? Course Outline (Approximate) Evaluation

  2. Green's function approximation from cross-correlations of 20100 Hz noise during a tropical storm

    E-Print Network [OSTI]

    Gerstoft, Peter

    Green's function approximation from cross-correlations of 20­100 Hz noise during a tropical storm Approximation of Green's functions through cross-correlation of acoustic signals in the ocean, a method referred-bottom-reflected interarray hydrophone travel times. The extracted Green's function depends on the propagating noise

  3. Fast Approximations for Sums of Distances, Clustering and the Fermat-Weber Problem 1

    E-Print Network [OSTI]

    Morin, Pat

    Fast Approximations for Sums of Distances, Clustering and the Fermat-Weber Problem 1 Prosenjit Bose) time deterministic and O(n) time randomized #15;-approximation algorithm for the so called Fermat-Weber numbers [1]. A famous problem related to the function w is the Fermat-Weber problem [4] which asks

  4. A Simple Linear Time (1 + )-Approximation Algorithm for k-Means Clustering in Any Dimensions

    E-Print Network [OSTI]

    Sen, Sandeep

    A Simple Linear Time (1 + )-Approximation Algorithm for k-Means Clustering in Any Dimensions Amit@cse.iitd.ernet.in Abstract We present the first linear time (1+)-approximation al- gorithm for the k-means problem for fixed of the most popular definitions of cluster- ing is the k-means clustering problem. Given a set of points P

  5. Relaxations of Approximate Linear Programs for the Real Option Management of Commodity Storage

    E-Print Network [OSTI]

    Sadeh, Norman M.

    Relaxations of Approximate Linear Programs for the Real Option Management of Commodity Storage in practice. Focusing on commodity storage, we identify a deficiency of approximate linear programming, which their corresponding ALPs. Applied to existing natural gas storage instances, our ALP relaxations significantly

  6. Approximate Hierarchies of Linear Control Systems Antoine Girard and George J. Pappas

    E-Print Network [OSTI]

    Pappas, George J.

    . In Section II, we briefly present some existing results [11], [16] on abstraction using exact simulation to an approximate simulation relation. The main contributions of the paper are in Sections IV and V. In Section IV-- Recently, a hierarchical control approach based on the notion of approximate simulation relations has been

  7. Convex inner approximations of nonconvex semialgebraic sets applied to fixed-order controller

    E-Print Network [OSTI]

    Boyer, Edmond

    conditions, see also [9]. Convex polytopic inner approximations were also obtained in [16], for discrete-time stability, using reflection coefficients. Convex inner approximations make it possible to design stabiliz- ing controllers with the help of convex optimization techniques, at the price of loosing optimality w

  8. Improved approximation of the Brinkman equation using a lattice Boltzmann method

    E-Print Network [OSTI]

    Bentz, Dale P.

    conditions. The Brinkman equation3 is a generalization of Darcy's law that facilitates the matchingImproved approximation of the Brinkman equation using a lattice Boltzmann method by Nicos S. Martys;Improved approximation of the Brinkman equation using a lattice Boltzmann method Nicos S. Martys Building

  9. Semi-analytic approximations for production of atmospheric muons and neutrinos

    E-Print Network [OSTI]

    Thomas K. Gaisser

    2001-04-19T23:59:59.000Z

    Simple approximations for fluxes of atmospheric muons and muon neutrinos are developed which display explicitly how the fluxes depend on primary cosmic ray energy and on features of pion production. For energies of approximately 10 GeV and above the results are sufficiently accurate to calculate response functions and to use for estimates of systematic uncertainties.

  10. Adiabatic approximation, Gell-Mann and Low theorem and degeneracies: A pedagogical example

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Adiabatic approximation, Gell-Mann and Low theorem and degeneracies: A pedagogical example if the evolution operator has no limit for adiabatic switchings, the Gell-Mann and Low formula allows to follow approximation (obtained by two different limiting procedures) is either useless or wrong, and the Gell

  11. Beam Propagation Method Using a [(p -1)/p] Pade Approximant of the Propagator

    E-Print Network [OSTI]

    Lu, Ya Yan

    propagation method (BPM) is developed based on a direct approximation to the propagator using the [(p - 1)/p of the BPM. 1 Introduction The beam propagation method (BPM)1­4 is widely used in numerical simulation, the governing equation is a scalar Helmholtz equation. The BPM relies on approximating the Helmholtz equation

  12. A Union Bound Approximation for Rapid Performance Evaluation of Punctured Turbo Codes

    E-Print Network [OSTI]

    Cambridge, University of

    A Union Bound Approximation for Rapid Performance Evaluation of Punctured Turbo Codes Ioannis a simple technique to approximate the performance union bound of a punctured turbo code. The bound to calculate the most significant terms of the transfer function of a turbo encoder. We demonstrate that

  13. A fast, flexible, approximate technique for computing radiative transfer in inhomogeneous cloud fields

    E-Print Network [OSTI]

    Robert, Pincus

    A fast, flexible, approximate technique for computing radiative transfer in inhomogeneous cloud.-J. Morcrette, A fast, flexible, approximate technique for computing radiative transfer in inhomogeneous cloud, which computes fluxes at each level. [3] The description of clouds in current LSMs is quite simple: Most

  14. Approximate logic circuits for low overhead, non-intrusive concurrent error detection

    E-Print Network [OSTI]

    Mohanram, Kartik

    Approximate logic circuits for low overhead, non-intrusive concurrent error detection Mihir R for the synthesis of approximate logic circuits. A low overhead, non-intrusive solution for concurrent error as proposed in this paper. A low overhead, non-intrusive solution for CED based on ap- proximate

  15. Validation of the correctness of the Hald approximation in assessing tolerance

    SciTech Connect (OSTI)

    Gurevich, M. I., E-mail: gur.m@mail.ru; Kalugin, M. A.; Chukbar, B. K. [National Research Center Kurchatov Institute (Russian Federation)

    2014-12-15T23:59:59.000Z

    An analysis was performed of the correctness of employing the approximate formula which is widely used when assessing tolerances in the results of regression analysis. The correctness of approximation with the frequently used ratio between the probability and significance level equal to 95/95 is demonstrated. Conditions of application of the formula under stricter requirements, for example, 99/99, are formulated.

  16. ROBUST VIDEO RESTORATION BY JOINT SPARSE AND LOW RANK MATRIX APPROXIMATION

    E-Print Network [OSTI]

    Shen, Zuowei

    ROBUST VIDEO RESTORATION BY JOINT SPARSE AND LOW RANK MATRIX APPROXIMATION HUI JI, SIBIN HUANG, ZUOWEI SHEN, AND YUHONG XU Abstract. This paper presents a new video restoration scheme based domain, we formulate the video restoration problem as a joint sparse and low-rank matrix approximation

  17. Approximate model checking of stochastic hybrid systems , J.-P. Katoen

    E-Print Network [OSTI]

    Abate, Alessandro

    -room heating system. 1 Introduction Stochastic hybrid systems are a broad and widely applicable classApproximate model checking of stochastic hybrid systems A. Abate , J.-P. Katoen , J. Lygeros , and M. Prandini§ Abstract A method for approximate model checking of stochastic hybrid systems

  18. Search for A Lyapunov Function through Empirical Approximation by Artificial Neural Nets: Theoretical Framework

    E-Print Network [OSTI]

    Serpen, Gursel

    Search for A Lyapunov Function through Empirical Approximation by Artificial Neural Nets approximator for empirical modeling of a Lyapunov function for a nonlinear dynamic system that projects stable of designing the so-called Lyapunov neural network, which empirically models a Lyapunov function, is described

  19. Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993

    SciTech Connect (OSTI)

    Alvin, M.A.

    1993-04-05T23:59:59.000Z

    (1) After 500 hours of operation in the pressurized fluidized-bed combustion gas environment, the fibrous outer membrane along the clay bonded silicon carbide Schumacher Dia Schumalith candles remained intact. The fibrous outer membrane did not permit penetration of fines through the filter wall. (2) An approximate 10-15% loss of material strength occurred within the intact candle clay bonded silicon carbide matrix after 500 hours of exposure to the PFBC gas environment. A relatively uniform strength change resulted within the intact candles throughout the vessel (i.e., top to bottom plenums), as well as within the various cluster ring positions (i.e., outer versus inner ring candle filters). A somewhat higher loss of material strength, i.e., 25% was detected in fractured candle segments removed from the W-APF ash hopper. (3) Sulfur which is present in the pressurized fluidized-bed combustion gas system induced phase changes along the surface of the binder which coats the silicon carbide grains in the Schumacher Dia Schumalith candle filter matrix.

  20. 1. Off for the day! We don't work too late if we can help it better to start early and catch some Joburg sunshine. Thx for following!about 23 hours ago via

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Joburg sunshine. Thx for following!about 23 hours ago via web 2. Reviewing our marketing best practices.We must constantly monitor use of our brand as it is our public identity...about 23 hours ago via web 3 must organize that tomorrow.about 24 hours ago via web 4. We are sms'ing 1,183 SA Comm Serv doctors

  1. Practical quantum key distribution over 60 hours at an optical fiber distance of 20km using weak and vacuum decoy pulses for enhanced security

    E-Print Network [OSTI]

    J. F. Dynes; Z. L. Yuan; A. W. Sharpe; A. J. Shields

    2011-04-15T23:59:59.000Z

    Experimental one-way decoy pulse quantum key distribution running continuously for 60 hours is demonstrated over a fiber distance of 20km. We employ a decoy protocol which involves one weak decoy pulse and a vacuum pulse. The obtained secret key rate is on average over 10kbps. This is the highest rate reported using this decoy protocol over this fiber distance and duration.

  2. An efficient approach to approximating the pair distribution function of the inhomogeneous hard-sphere fluid

    E-Print Network [OSTI]

    Paho Lurie-Gregg; Jeff B. Schulte; David Roundy

    2014-09-24T23:59:59.000Z

    We introduce an approximation for the pair distribution function of the inhomogeneous hard sphere fluid. Our approximation makes use of our recently published averaged pair distribution function at contact which has been shown to accurately reproduce the averaged pair distribution function at contact for inhomogeneous density distributions. This approach achieves greater computational efficiency than previous approaches by enabling the use of exclusively fixed-kernel convolutions and thus allowing an implementation using fast Fourier transforms. We compare results for our pair distribution approximation with two previously published works and Monte-Carlo simulation, showing favorable results.

  3. On the use of consistent approximations for the optimal design of beams

    SciTech Connect (OSTI)

    Polak, E.; Neto, C.K.

    1994-12-31T23:59:59.000Z

    Most optimal design problems can only be solved through discretization. One solution strategy is to expand the original problem into an infinite sequence of finite dimensional, approximating nonlinear programming problems, which can be solved using standard algorithms. In this paper, an expansion strategy based on the concept of consistent approximations is proposed for certain optimal beam design problems, where the beam is modelled using Euler-Bernoulli beam theory. It is shown that any accumulation point of the sequence of the stationary points of the family of approximating problems is a stationary point of the original, infinite-dimensional problem. Numerical results are presented for problems of optimal design of fixed beams.

  4. Statistical mechanics of the nonlinear Schroedinger equation. II. Mean field approximation

    SciTech Connect (OSTI)

    Lebowitz, J.L.; Rose, H.A.; Speer, E.R.

    1989-01-01T23:59:59.000Z

    The authors investigate a mean field approximation to the statistical mechanics of complex fields with dynamics governed by the nonlinear Schroedinger equation. Such fields, whose Hamiltonian is unbounded below, may model plasmas, lasers, and other physical systems. Restricting themselves to one-dimensional systems with periodic boundary conditions, we find in the mean field approximation a phase transition from a uniform regime to a regime in which the system is dominated by solitons. They compute explicitly, as a function of temperature and density (L/sup 2/ norm), the transition point at which the uniform configuration becomes unstable to local perturbations; static and dynamic mean field approximations yield the same result.

  5. First and second order approximations to stage numbers in multicomponent enrichment cascades

    SciTech Connect (OSTI)

    Scopatz, A. [University of Chicago, 5754 S. Ellis Ave, Chicago, IL, 60637 (United States)

    2013-07-01T23:59:59.000Z

    This paper describes closed form, Taylor series approximations to the number product stages in a multicomponent enrichment cascade. Such closed form approximations are required when a symbolic, rather than a numeric, algorithm is used to compute the optimal cascade state. Both first and second order approximations were implemented. The first order solution was found to be grossly incorrect, having the wrong functional form over the entire domain. On the other hand, the second order solution shows excellent agreement with the 'true' solution over the domain of interest. An implementation of the symbolic, second order solver is available in the free and open source PyNE library. (authors)

  6. Approximations Exponential

    E-Print Network [OSTI]

    Bröcker, Jochen

    , probability theory and statistics have experienced fruitful appli- cation in many #12;elds of engineering on the necessity of statistics in science. Progress in science is often ascribed to experimentation. The research, in 7 #12; 8 Chapter 1. Introduction physics, statistics and probability theory has become a central

  7. Gyrokinetic Approximation

    E-Print Network [OSTI]

    Frénod, Emmanuel

    , , , W , J, ) r t = (EDr + MCDr ), t = W q(r)R + ED + MCD r , t = W R , W t = (E0 + E1 ) - J |B| + W

  8. THE NUMERICAL APPROXIMATION FOR THE INTEGRABILITY PROBLEM AND THE MEASURE OF WELFARE CHANGES, AND ITS APPLICATIONS

    E-Print Network [OSTI]

    Lim, Sung Jin

    2012-01-01T23:59:59.000Z

    This dissertation mainly studied on numerical approximation methods as a solution of the integrability problem and the measure of welfare changes, and demonstrated how numerical algorithms can be applied in empirical studies ...

  9. Value Function Approximation on Non-Linear Manifolds for Robot Motor Control 

    E-Print Network [OSTI]

    Sugiyama, Masashi; Hachiya, Hirotaka; Towell, Christopher; Vijayakumar, Sethu

    The least squares approach works efficiently in value function approximation, given appropriate basis functions. Because of its smoothness, the Gaussian kernel is a popular and useful choice as a basis function. However, ...

  10. Higher order global differentiability local approximations for 2-D and 3-D distorted element geometries

    E-Print Network [OSTI]

    Maduri, Rajesh Kumar

    2008-02-01T23:59:59.000Z

    The primary focus of this thesis is to present a framework to develop higher order global differentiability local approximations for 2-D and 3-D distorted element geometries. The necessity and superiority of higher order global differentiability...

  11. Far-Field Approximation in the Generalized Geometry Holdup (GGH) Model

    SciTech Connect (OSTI)

    Oberer, R. B.; Gunn, C. A.; Chiang, L.G.

    2006-09-07T23:59:59.000Z

    Quantitative gamma spectrometry measurements of uranium frequently require corrections for attenuation by an equipment or container layer and by the uranium bearing material itself. It is common to correct for attenuation using the ''far-field approximation''. Under this approximation, the minimum thickness of equipment or material is used for the correction rather than an average thickness over the detector field-of-view. In reality this aspect of the far-field approximation is really a narrow field-of-view approximation. The price of this simplification is the introduction of a bias. This bias will be investigated in this paper. In addition, there is a distance dependence of the radial response of a detector. This dependence will also be investigated.

  12. PerformancePreserving Controller Approximation P.J. Goddard \\Lambda and K. Glover.

    E-Print Network [OSTI]

    Cambridge, University of

    Performance­Preserving Controller Approximation P.J. Goddard \\Lambda and K. Glover. (Corresponding Author: K. Glover) Department of Engineering University of Cambridge Trumpington Street Cambridge CB2 1PZ

  13. An Approximation Algorithm for Max-Min Fair Allocation of Indivisible Goods

    E-Print Network [OSTI]

    Saberi, Amin

    Saberi Abstract In this paper, we give the first approximation algorithm for the problem of max-min fair 94305. Email:{asadpour,saberi}@stanford.edu. 1 #12;1 Introduction Fair division, also known as the cake

  14. EISENSTEIN SERIES AND APPROXIMATIONS TO Bruce C. Berndt and Heng Huat Chan

    E-Print Network [OSTI]

    Berndt, Bruce C.

    EISENSTEIN SERIES AND APPROXIMATIONS TO Bruce C. Berndt and Heng Huat Chan Dedicated to K AND HENG HUAT CHAN Chap. 5]. As will be seen, this page in the lost notebook is closely connected

  15. EISENSTEIN SERIES AND APPROXIMATIONS TO # Bruce C. Berndt and Heng Huat Chan

    E-Print Network [OSTI]

    Berndt, Bruce C.

    EISENSTEIN SERIES AND APPROXIMATIONS TO # Bruce C. Berndt and Heng Huat Chan Dedicated to K; 2 BRUCE C. BERNDT AND HENG HUAT CHAN Chap. 5]. As will be seen, this page in the lost notebook

  16. A fast algorithm for approximating the ground state energy on a quantum computer Anargyros Papageorgiou,1,

    E-Print Network [OSTI]

    , Columbia University, New York, NY 10027, USA. (Dated: May 11, 2011) Estimating the ground state energy#12;A fast algorithm for approximating the ground state energy on a quantum computer Anargyros

  17. Error Analysis of Free Probability Approximations to the Density of States of Disordered Systems

    E-Print Network [OSTI]

    Chen, Jiahao

    Theoretical studies of localization, anomalous diffusion and ergodicity breaking require solving the electronic structure of disordered systems. We use free probability to approximate the ensemble-averaged density of states ...

  18. Combining Strategies for Parallel Stochastic Approximation Monte Carlo Algorithm of Big Data

    E-Print Network [OSTI]

    Lin, Fang-Yu

    2014-10-15T23:59:59.000Z

    of iterations and is prone to get trapped into local optima. On the other hand, Stochastic Approximation in Monte Carlo algorithm (SAMC), a very sophisticated algorithm in theory and applications, can avoid getting trapped into local optima and produce more...

  19. Direction-Preserving and Schur-Monotonic Semi-Separable Approximations of Symmetric Positive Definite Matrices}

    SciTech Connect (OSTI)

    Gu, M; Li, X S; Vassilevski, P S

    2010-03-16T23:59:59.000Z

    For a given symmetric positive definite matrix A {element_of} R{sup N x N}, we develop a fast and backward stable algorithm to approximate A by a symmetric positive-definite semi-separable matrix, accurate to a constant multiple of any prescribed tolerance. In addition, this algorithm preserves the product, AZ, for a given matrix Z {element_of} R{sup N x d}, where d << N. Our algorithm guarantees the positive-definiteness of the semi-separable matrix by embedding an approximation strategy inside a Cholesky factorization procedure to ensure that the Schur complements during the Cholesky factorization all remain positive definite after approximation. It uses a robust direction-preserving approximation scheme to ensure the preservation of AZ. We present numerical experiments and discuss potential implications of our work.

  20. Direction-preserving and Schur-monotonic Semi-separable Approximations of Symmetric Positive Definite Matrices

    SciTech Connect (OSTI)

    Gu, Ming; Li, Xiaoye Sherry; Vassilevski, Panayot S.

    2009-10-20T23:59:59.000Z

    For a given symmetric positive definite matrix A {element_of} R{sup nxn}, we develop a fast and backward stable algorithm to approximate A by a symmetric positive-definite semi-separable matrix, accurate to any prescribed tolerance. In addition, this algorithm preserves the product, AZ, for a given matrix Z {element_of} R{sup nxd}, where d << n. Our algorithm guarantees the positive-definiteness of the semi-separable matrix by embedding an approximation strategy inside a Cholesky factorization procedure to ensure that the Schur complements during the Cholesky factorization all remain positive definite after approximation. It uses a robust direction-preserving approximation scheme to ensure the preservation of AZ. We present numerical experiments and discuss potential implications of our work.

  1. Efficient and private distance approximation in the communication and streaming models

    E-Print Network [OSTI]

    Woodruff, David Paul, 1980-

    2007-01-01T23:59:59.000Z

    This thesis studies distance approximation in two closely related models - the streaming model and the two-party communication model. In the streaming model, a massive data stream is presented in an arbitrary order to a ...

  2. NUMERICAL ANALYSIS OF A FINITE ELEMENT SCHEME FOR THE APPROXIMATION OF HARMONIC MAPS INTO SURFACES

    E-Print Network [OSTI]

    Bartels, Soeren

    NUMERICAL ANALYSIS OF A FINITE ELEMENT SCHEME FOR THE APPROXIMATION OF HARMONIC MAPS INTO SURFACES Geometric partial differential equations and their analysis as well as numerical simulation have recently

  3. A Simple Linear Time (1 + #)Approximation Algorithm for kMeans Clustering in Any Dimensions

    E-Print Network [OSTI]

    Kumar, Amit

    A Simple Linear Time (1 + #)­Approximation Algorithm for k­Means Clustering in Any Dimensions Amit@cse.iitd.ernet.in Abstract We present the first linear time (1+#)­approximation al­ gorithm for the k­means problem for fixed of the most popular definitions of cluster­ ing is the k­means clustering problem. Given a set of points P

  4. Bayesian model selection using exact and approximated posterior probabilities with applications to Star Data

    E-Print Network [OSTI]

    Pokta, Suriani

    2004-11-15T23:59:59.000Z

    of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2004 Major Subject: Statistics BAYESIAN MODEL SELECTION USING EXACT AND APPROXIMATED POSTERIOR PROBABILITIES WITH APPLICATIONS TO STAR DATA A Dissertation by SURIANI POKTA Submitted to Texas A.... Longnecker (Head of Department) August 2004 Major Subject: Statistics iii ABSTRACT Bayesian Model Selection Using Exact and Approximated Posterior Probabilities with Applications to Star Data. (August 2004) Suriani Pokta, B.S., Mathematics, University...

  5. Quasiparticle and Optical Excitations in Solid Ne and Ar: GW and BSE Approximations

    SciTech Connect (OSTI)

    Patterson, Charles H.; Galamic-Mulaomerovic, S. [School of Physics, Trinity College Dublin, Dublin 2 (Ireland)

    2007-12-26T23:59:59.000Z

    The GW approximation and the Bethe-Salpeter equation (BSE) have been used to calculate quasiparticle and optical excitations in solid Ne and Ar. Absolute positions of quasiparticle and quasihole energies are found to be in very good agreement with experimental values. Binding energies of Frenkel excitons for these systems calculated using the BSE are also in good agreement with experiment. Splitting of excitons into longitudinal and transverse modes is calculated and found to be approximately twice the experimentally measured value.

  6. Development of iteration strategies for a practical implementation of a higher order transverse leakage approximation

    SciTech Connect (OSTI)

    Prinsloo, R. H.; Tomasevic, D. I. [Necsa, PO Box 582, Pretoria, 0001 (South Africa)

    2012-07-01T23:59:59.000Z

    Transverse integrated nodal diffusion methods currently represent the standard in full core neutronic simulation. The primary shortcoming in this approach is the utilization of the quadratic transverse leakage approximation. This approach, although proven to work well for typical LWR problems, is not consistent with the formulation of nodal methods and can cause accuracy and convergence problems. In previous work, an improved, consistent quadratic leakage approximation was formulated, which derived from the class of higher order nodal methods developed some years ago. In this paper a number of iteration schemes are developed around this consistent quadratic leakage approximation which yield accurate node average results in much improved calculational times. The developed consistent leakage approximation is extended in this work via a number of numerical schemes, the most promising of which results from utilizing the consistent leakage approximation as a correction method to the standard quadratic leakage approximation. Numerical results are demonstrated on a set of benchmark problems, such as the 3D IAEA LWR and MOX C5 problems. (authors)

  7. Universal resources for approximate and stochastic measurement-based quantum computation

    E-Print Network [OSTI]

    C. E. Mora; M. Piani; A. Miyake; M. Van den Nest; W. Dür; H. J. Briegel

    2010-05-10T23:59:59.000Z

    We investigate which quantum states can serve as universal resources for approximate and stochastic measurement-based quantum computation, in the sense that any quantum state can be generated from a given resource by means of single-qubit (local) operations assisted by classical communication. More precisely, we consider the approximate and stochastic generation of states, resulting e.g. from a restriction to finite measurement settings or from possible imperfections in the resources or local operations. We show that entanglement-based criteria for universality obtained for the exact, deterministic case can be lifted to the much more general approximate, stochastic case, moving from the idealized situation considered in previous works, to the practically relevant context of non-perfect state preparation. We find that any entanglement measure fulfilling some basic requirements needs to reach its maximum value on some element of an approximate, stochastic universal family of resource states, as the resource size grows. This allows us to rule out various families of states as being approximate, stochastic universal. We provide examples of resources that are efficient approximate universal, but not exact deterministic universal. We also study the robustness of universal resources for measurement-based quantum computation under realistic assumptions about the (imperfect) generation and manipulation of entangled states, giving an explicit expression for the impact that errors made in the preparation of the resource have on the possibility to use it for universal approximate and stochastic state preparation. Finally, we discuss the relation between our entanglement-based criteria and recent results regarding the uselessness of states with a high degree of geometric entanglement as universal resources.

  8. Nonequilibrium molecular vibrons: An approach based on the nonequilibrium Green function technique and the self-consistent Born approximation

    E-Print Network [OSTI]

    Cuniberti, Gianaurelio

    an analytical theory for this case. This theory is based on the self-consistent Born approximation SCBA , which

  9. Stress-energy tensor in colliding plane wave space-times: An approximation procedure

    E-Print Network [OSTI]

    Miquel Dorca

    1997-11-07T23:59:59.000Z

    In a recent work on the quantization of a massless scalar field in a particular colliding plane wave space-time, we computed the vacuum expectation value of the stress-energy tensor on the physical state which corresponds to the Minkowski vacuum before the collision of the waves. We did such a calculation in a region close to both the Killing-Cauchy horizon and the folding singularities that such a space-time contains. In the present paper, we give a suitable approximation procedure to compute this expectation value, in the conformal coupling case, throughout the causal past of the center of the collision. This will allow us to approximately study the evolution of such an expectation value from the beginning of the collision until the formation of the Killing-Cauchy horizon. We start with a null expectation value before the arrival of the waves, which then acquires nonzero values at the beginning of the collision and grows unbounded towards the Killing-Cauchy horizon. The value near the horizon is compatible with our previous result, which means that such an approximation may be applied to other colliding plane wave space-times. Even with this approximation, the initial modes propagated into the interaction region contain a function which cannot be calculated exactly and to ensure the correct regularization of the stress-energy tensor with the point-splitting technique, this function must be given up to adiabatic order four of approximation.

  10. Improved master equation approach to quantum transport: From Born to self-consistent Born approximation

    E-Print Network [OSTI]

    Jun Li; Jinshuang Jin; Xin-Qi Li; YiJing Yan

    2014-06-26T23:59:59.000Z

    Beyond the second-order Born approximation, we develop an improved master equation approach to quantum transport by virtue of a self-consistent Born approximation. The basic idea is replacing the free Green's function in the tunneling self-energy by an effective reduced propagator under the Born approximation. We found that the effect of this simple improvement is remarkable, for instance, it can not only recover the exact result of noninteracting transport under arbitrary voltages, but also predict the challenging nonequilibrium Kondo effect. In addition to having an elegant structure, the application convenience and accuracy of the proposed scheme, as demonstrated by the examples in this work, may suggest it a useful tool for quantum transports.

  11. AN EFFICIENT APPROXIMATION TO THE LIKELIHOOD FOR GRAVITATIONAL WAVE STOCHASTIC BACKGROUND DETECTION USING PULSAR TIMING DATA

    SciTech Connect (OSTI)

    Ellis, J. A.; Siemens, X. [Center for Gravitation, Cosmology and Astrophysics, University of Wisconsin Milwaukee, Milwaukee, WI 53211 (United States); Van Haasteren, R. [Max-Planck-Institut fuer Gravitationphysik (Albert-Einstein-Institut), D-30167 Hanover (Germany)

    2013-05-20T23:59:59.000Z

    Direct detection of gravitational waves by pulsar timing arrays will become feasible over the next few years. In the low frequency regime (10{sup -7} Hz-10{sup -9} Hz), we expect that a superposition of gravitational waves from many sources will manifest itself as an isotropic stochastic gravitational wave background. Currently, a number of techniques exist to detect such a signal; however, many detection methods are computationally challenging. Here we introduce an approximation to the full likelihood function for a pulsar timing array that results in computational savings proportional to the square of the number of pulsars in the array. Through a series of simulations we show that the approximate likelihood function reproduces results obtained from the full likelihood function. We further show, both analytically and through simulations, that, on average, this approximate likelihood function gives unbiased parameter estimates for astrophysically realistic stochastic background amplitudes.

  12. An improved approximation scheme for the centrifugal term and the Hulthen potential

    E-Print Network [OSTI]

    Sameer M. Ikhdair

    2009-01-07T23:59:59.000Z

    We present a new approximation scheme for the centrifugal term to solve the Schrodinger equation with the Hulthen potential for any arbitrary l state by means of a mathematical Nikiforov-Uvarov (NU) method. We obtain the bound state energy eigenvalues and the normalized corresponding eigenfunctions expressed in terms of the Jacobi polynomials or hypergeometric functions for a particle exposed to this potential field. Our numerical results of the energy eigenvalues are found to be in high agreement with those results obtained by using the program based on a numerical integration procedure. The s-wave (l=0) analytic solution for the binding energies and eigenfunctions of a particle are also calculated. The physical meaning of the approximate analytical solution is discussed. The present approximation scheme is systematic and accurate.

  13. On Lossless Approximations, the Fluctuation-Dissipation Theorem, and Limitations of Measurements

    E-Print Network [OSTI]

    Sandberg, Henrik; Doyle, John C

    2010-01-01T23:59:59.000Z

    In this paper, we take a control-theoretic approach to answering some standard questions in statistical mechanics, and use the results to derive limitations of classical measurements. A central problem is the relation between systems which appear macroscopically dissipative but are microscopically lossless. We show that a linear system is dissipative if, and only if, it can be approximated by a linear lossless system over arbitrarily long time intervals. Hence lossless systems are in this sense dense in dissipative systems. A linear active system can be approximated by a nonlinear lossless system that is charged with initial energy. As a by-product, we obtain mechanisms explaining the Onsager relations from time-reversible lossless approximations, and the fluctuation-dissipation theorem from uncertainty in the initial state of the lossless system. The results are applied to measurement devices and are used to quantify limits on the so-called observer effect, also called back action, which is the impact the me...

  14. Relativistic equation of state at subnuclear densities in the Thomas-Fermi approximation

    SciTech Connect (OSTI)

    Zhang, Z. W.; Shen, H., E-mail: shennankai@gmail.com [School of Physics, Nankai University, Tianjin 300071 (China)

    2014-06-20T23:59:59.000Z

    We study the non-uniform nuclear matter using the self-consistent Thomas-Fermi approximation with a relativistic mean-field model. The non-uniform matter is assumed to be composed of a lattice of heavy nuclei surrounded by dripped nucleons. At each temperature T, proton fraction Y{sub p} , and baryon mass density ? {sub B}, we determine the thermodynamically favored state by minimizing the free energy with respect to the radius of the Wigner-Seitz cell, while the nucleon distribution in the cell can be determined self-consistently in the Thomas-Fermi approximation. A detailed comparison is made between the present results and previous calculations in the Thomas-Fermi approximation with a parameterized nucleon distribution that has been adopted in the widely used Shen equation of state.

  15. Approximate inference on planar graphs using loop calculus and belief progagation

    SciTech Connect (OSTI)

    Chertkov, Michael [Los Alamos National Laboratory; Gomez, Vicenc [RADBOUD UNIV; Kappen, Hilbert [RADBOUD UNIV

    2009-01-01T23:59:59.000Z

    We introduce novel results for approximate inference on planar graphical models using the loop calculus framework. The loop calculus (Chertkov and Chernyak, 2006b) allows to express the exact partition function Z of a graphical model as a finite sum of terms that can be evaluated once the belief propagation (BP) solution is known. In general, full summation over all correction terms is intractable. We develop an algorithm for the approach presented in Chertkov et al. (2008) which represents an efficient truncation scheme on planar graphs and a new representation of the series in terms of Pfaffians of matrices. We analyze in detail both the loop series and the Pfaffian series for models with binary variables and pairwise interactions, and show that the first term of the Pfaffian series can provide very accurate approximations. The algorithm outperforms previous truncation schemes of the loop series and is competitive with other state-of-the-art methods for approximate inference.

  16. Simulating higher-dimensional geometries in GADRAS using approximate one-dimensional solutions.

    SciTech Connect (OSTI)

    Thoreson, Gregory G.; Mitchell, Dean James; Harding, Lee T.

    2013-02-01T23:59:59.000Z

    The Gamma Detector Response and Analysis Software (GADRAS) software package is capable of simulating the radiation transport physics for one-dimensional models. Spherical shells are naturally one-dimensional, and have been the focus of development and benchmarking. However, some objects are not spherical in shape, such as cylinders and boxes. These are not one-dimensional. Simulating the radiation transport in two or three dimensions is unattractive because of the extra computation time required. To maintain computational efficiency, higher-dimensional geometries require approximations to simulate them in one-dimension. This report summarizes the theory behind these approximations, tests the theory against other simulations, and compares the results to experimental data. Based on the results, it is recommended that GADRAS users always attempt to approximate reality using spherical shells. However, if fissile material is present, it is imperative that the shape of the one-dimensional model matches the fissile material, including the use of slab and cylinder geometry.

  17. Mesoscale asymptotic approximations to solutions of mixed boundary value problems in perforated domains

    E-Print Network [OSTI]

    Vladimir Maz'ya; Alexander Movchan; Michael Nieves

    2010-05-24T23:59:59.000Z

    We describe a method of asymptotic approximations to solutions of mixed boundary value problems for the Laplacian in a three-dimensional domain with many perforations of arbitrary shape, with the Neumann boundary conditions being prescribed on the surfaces of small voids. The only assumption made on the geometry is that the diameter of a void is assumed to be smaller compared to the distance to the nearest neighbour. The asymptotic approximation, obtained here, involves a linear combination of dipole fields constructed for individual voids, with the coefficients, which are determined by solving a linear algebraic system. We prove the solvability of this system and derive an estimate for its solution. The energy estimate is obtained for the remainder term of the asymptotic approximation.

  18. On approximations of the Schr\\"odinger-Newton equation by harmonic potentials

    E-Print Network [OSTI]

    Großardt, André

    2015-01-01T23:59:59.000Z

    The evolution of the, initially Gaussian, centre-of-mass wave-function for a homogeneous, spherical particle according to the Schr\\"odinger-Newton equation can be approximated by a harmonic potential, if the wave-function is narrow compared to the size of the particle. Here, the validity of a previously proposed approximation of the Schr\\"odinger-Newton equation is studied, where this is extended beyond the regime of narrow wave-functions, replacing the coupling constant of the harmonic potential by a function of the wave-function width. It turns out that such an extension beyond the narrow wave-function regime is not a good approximation for the self-gravitational evolution according to the Schr\\"odinger-Newton equation.

  19. Power Spectra beyond the Slow Roll Approximation in Theories with Non-Canonical Kinetic Terms

    E-Print Network [OSTI]

    Carsten van de Bruck; Mathew Robinson

    2014-07-23T23:59:59.000Z

    We derive analytical expressions for the power spectra at the end of inflation in theories with two inflaton fields and non-canonical kinetic terms. We find that going beyond the slow-roll approximation is necessary and that the nature of the non-canonical terms have an important impact on the final power spectra at the end of inflation. We study five models numerically and find excellent agreement with our analytical results. Our results emphasise the fact that going beyond the slow-roll approximation is important in times of high-precision data coming from cosmological observations.

  20. The justification of 'Two-Level Approximation' in strong light-matter interaction

    E-Print Network [OSTI]

    Faheel Ather Hashmi; Shi-Yao Zhu

    2014-06-02T23:59:59.000Z

    We investigate the influence of the additional third level on the dynamic evolution of a Two-Level system interacting with a coherent field in the strong coupling regime where Rotating Wave Approximation is not valid. We find that the additional level has great influence on the evolution of the system population. Our results show that the Two-Level model is not a good approximation in this strong light-matter coupling regime. We further investigate the parameter space where the Two-Level model can still be justified.