Powered by Deep Web Technologies
Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Audit of Staffing Requirements for the Strategic Petroleum Reserve...  

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

Staffing Requirements for the Strategic Petroleum Reserve, IG-0370 Audit of Staffing Requirements for the Strategic Petroleum Reserve, IG-0370 Audit of Staffing Requirements for...

2

Workforce Analysis and Staffing | Department of Energy  

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

Services » Assistance » Federal Technical Capability Program » Services » Assistance » Federal Technical Capability Program » Workforce Analysis and Staffing Workforce Analysis and Staffing Workforce Analysis & Staffing Plan Report Memo, Template & Workforce Analysis Guidance for FR, SSO, STSM & TQP Calendar Year 2013 Calendar Year 2012 Calendar Year 2011 Calendar Year 2010 SSO Alternate Staffing Analysis Instructions, Blank spreadsheet and example filled spreadsheet FR Staffing Process See Appendix C in DOE-STD-1063-2011, Facility Representatives Additional Information FTCP History FTCP Members FTCP Plans & Reports FTCP Guiding Documents FTCP Issue Papers FTCP Site Specific Information Workforce Analysis and Staffing Enforcement Guidance Oversight Reporting Security Classification Nuclear Safety Assistance Training

3

2010 Annual Workforce Analysis and Staffing Plan Report - LASO  

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

Center is being utilized to cover some of the identified gaps in staffing. The Chemistry and Metallurgy Research Replacement Project staffing projection is included in the...

4

Human Resources Staffing Plan for the Tank Farm Contractor  

SciTech Connect

The Human Resources Staffing Plan quantified the equivalent staffing needs required for the Tank Farm Contractor (TFC) and its subcontractors to execute the readiness to proceed baseline between FY 2000-2008. The TFC staffing needs were assessed along with the staffings needs of Fluor Hanford and the privatization contractor. The plan then addressed the staffing needs and recruitment strategies required to execute the baseline.

BOSLEY, J.W.

2000-04-22T23:59:59.000Z

5

Microsoft Word - SSO-StaffingAnalysis_Instructions.docx  

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

Proposed Safety System Oversight (SSO) Staffing Analysis Method Proposed Safety System Oversight (SSO) Staffing Analysis Method Instructions for completing SSO Staffing Analysis Worksheet This Staffing Analysis calculation is completed using an Excel worksheet. Information locations are identified by titles in column or row headings and worksheet locations based on the unmodified blank worksheet attached. Use caution when making worksheet modifications since changes to the worksheet format may inadvertently change included formula referenced cells. Column Headings (worksheet row 5) Identify the years the staffing analysis will evaluate. Calendar years or fiscal years can be identified depending on your end use. The FTCP Workforce Analysis requests calendar year data. Budgeting and staffing decisions are

6

Office Safety System Oversight Staffing Plan - Filled  

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

Los Alamos Site Office Safety System Oversight Staffing Plan" Los Alamos Site Office Safety System Oversight Staffing Plan" "December 2008" "ACTIVITIES","Days for Activity in each Fiscal Year",,,,,,"Notes" ,"FY09","FY10","FY11","FY12","FY13","FY14" "Task Based",,,,,,,"Integrated Assessment Schedule items, SET lead, 15 days per assessment for team leader, based on 8 hour days, 7 days for team member (30 SC, 82 SS systems). Formal assessments can be reduced as CAS matures & Shadow assessments increased. (NA-1 SD 226.1A)" "7 SC Assessments",154,154,154,132,132,110 "10 SS System Assessments",220,220,220,198,198,176 "12 Shadow Assessments",48,48,48,68,68,92,"4 days per normal shadow assessment (NA-1 SD 226.1A)"

7

Spent Nuclear Fuel Project operational staffing plan  

SciTech Connect

Using the Spent Nuclear Fuel (SNF) Project`s current process flow concepts and knowledge from cognizant engineering and operational personnel, an initial assessment of the SNF Project radiological exposure and resource requirements was completed. A small project team completed a step by step analysis of fuel movement in the K Basins to the new interim storage location, the Canister Storage Building (CSB). This analysis looked at fuel retrieval, conditioning of the fuel, and transportation of the fuel. This plan describes the staffing structure for fuel processing, fuel movement, and the maintenance and operation (M&O) staffing requirements of the facilities. This initial draft does not identify the support function resources required for M&O, i.e., administrative and engineering (technical support). These will be included in future revisions to the plan. This plan looks at the resource requirements for the SNF subprojects, specifically, the operations of the facilities, balances resources where applicable, rotates crews where applicable, and attempts to use individuals in multi-task assignments. This plan does not apply to the construction phase of planned projects that affect staffing levels of K Basins.

Debban, B.L.

1996-03-01T23:59:59.000Z

8

Y-12 selects small businesses to assist with staffing needs ...  

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

selects small businesses to assist with staffing needs | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

9

2011 Annual Workforce Analysis and Staffing Plan Report - Pantex...  

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

Pantex Site Office 2011 Annual Workforce Analysis and Staffing Plan Report - Pantex Site Office Managers perform an annual workforce analysis of their organization and develop...

10

2010 Annual Workforce Analysis and Staffing Plan Report - Pantex...  

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

Pantex Site Office 2010 Annual Workforce Analysis and Staffing Plan Report - Pantex Site Office Managers perform an annual workforce analysis of their organization and develop...

11

2010 Workforce Analysis and Staffing Plan Report Memo, Guidance and  

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

0 Workforce Analysis and Staffing Plan Report Memo, Guidance and 0 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template 2010 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template The Department of Energy Federal Technical Capability Order, DOE 0 426.1, requires that managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP Template-2010.docx Description TEMPLATE More Documents & Publications 2010 Annual Workforce Analysis and Staffing Plan Report - Carlsbad Field

12

2011 Workforce Analysis and Staffing Plan Report Memo, Guidance and  

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

1 Workforce Analysis and Staffing Plan Report Memo, Guidance and 1 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template 2011 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template The Department of Energy Federal Technical Capability Order, DOE 0 426.1, requires that managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP Template-2011.docx Description TEMPLATE More Documents & Publications 2012 Workforce Analysis and Staffing Plan Report Memo, Guidance and

13

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ |  

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

Annual Workforce Analysis and Staffing Plan Report - NNSA HQ Annual Workforce Analysis and Staffing Plan Report - NNSA HQ 2012 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2012 Annual Workforce Analysis and Staffing Plan Report - NA-SH

14

2012 Workforce Analysis and Staffing Plan Report Memo, Guidance and  

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

Workforce Analysis and Staffing Plan Report Memo, Guidance and Workforce Analysis and Staffing Plan Report Memo, Guidance and Template 2012 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template The Department of Energy Federal Technical Capability Order, DOE O 426.1, requires that managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP Template-2012.docx Description TEMPLATE More Documents & Publications 2010 Workforce Analysis and Staffing Plan Report Memo, Guidance and

15

2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ |  

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

2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ 2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ 2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2011 Annual Workforce Analysis and Staffing Plan Report - NA-SH

16

2013 Workforce Analysis and Staffing Plan Report Memo, Guidance and  

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

3 Workforce Analysis and Staffing Plan Report Memo, Guidance and 3 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template 2013 Workforce Analysis and Staffing Plan Report Memo, Guidance and Template The Department of Energy Federal Technical Capability Order, DOE 0 426.1, requires that managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP Template-2013.docx Description TEMPLATE More Documents & Publications 2012 Workforce Analysis and Staffing Plan Report Memo, Guidance and

17

2011 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated  

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

EM EM Consolidated Business Center 2011 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated Business Center Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2011 Annual Workforce Analysis and Staffing Plan Report - EMCBC

18

2011 Annual Workforce Analysis and Staffing Plan Report - Richland  

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

Richland Richland Operations Office 2011 Annual Workforce Analysis and Staffing Plan Report - Richland Operations Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2011 Annual Workforce Analysis and Staffing Plan Report - RL

19

2010 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated  

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

EM EM Consolidated Business Center 2010 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated Business Center Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2010 Annual Workforce Analysis and Staffing Plan Report - EMCBC

20

2012 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated  

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

EM EM Consolidated Business Center 2012 Annual Workforce Analysis and Staffing Plan Report - EM Consolidated Business Center Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance. 2012 Annual Workforce Analysis and Staffing Plan Report - EMCBC

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

2010 Annual Workforce Analysis and Staffing Plan Report - Richland  

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

2010 Annual Workforce Analysis and Staffing Plan Report - Richland 2010 Annual Workforce Analysis and Staffing Plan Report - Richland Operations Office 2010 Annual Workforce Analysis and Staffing Plan Report - Richland Operations Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance.

22

2011 Annual Workforce Analysis and Staffing Plan Report - LASO  

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

REPLY TO REPLY TO ATTN OF: SUBJECT: TO: NNSA/DOE -JAN 2 3 2012 Kevin W. Smith Los Alamos Site Office Workforce Analysis and Staffing Plan Report for Calendar Year 2011 Karen Boardman, Chairperson, Federal Technical Capability Panel, HS-70, National Training Center Reference: 1. Memorandum, from Karen L. Boardman, Chairperson, Federal Technical Capability Panel, for distribution, Subject: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011, dated October 13, 2011. Attached please find the Los Alamos Site Office (LASO) Annual Workforce Analysis and Staffing Plan for Calendar Year 2011. Authorized Federal Full Time Equivalent (FTE) allocation remains less than the number of FTEs required to perform the oversight identified necessary by the analysis results reported. Staffing shortfalls are compensated

23

2012 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest  

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

2 Annual Workforce Analysis and Staffing Plan Report - Pacific 2 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office 2012 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance.

24

2010 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest  

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

0 Annual Workforce Analysis and Staffing Plan Report - Pacific 0 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office 2010 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance.

25

2012 Annual Workforce Analysis and Staffing Plan Report - Richland  

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

2 Annual Workforce Analysis and Staffing Plan Report - Richland 2 Annual Workforce Analysis and Staffing Plan Report - Richland Operations Office 2012 Annual Workforce Analysis and Staffing Plan Report - Richland Operations Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance.

26

2010 Annual Workforce Analysis and Staffing Plan Report - Sandia  

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

O. Box 5400 O. Box 5400 Albuquerque, New Mexico 87185-5400 JAN 2 4 2011 * MEMORANDUM FOR: Karen Boardman, Chairperson, Office of the Director Federal Technical Capability Panel FROM: SUBJECT: REFERENCE: Patty Wagner, Manager ·~~ ~ Annual Workforce Analysis and Staffing Plan Report for 2010 Boardman/Distribution List memorandum dated October 28, 2010; Subject: "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2010-10-NA SC-09" We have completed our workforce analysis and developed our staffing plan in accordance with the guidance provided in the referenced memorandum. Our report is attached. Please note that the Sandia Site Office is continuing the transition to a different process of oversight management during 2011. These changes will continue to affect our staffing

27

2011 Annual Workforce Analysis and Staffing Plan Report - PXSO  

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

Karen L. Boardman, Federal Technical Capability Panel Chairperson Karen L. Boardman, Federal Technical Capability Panel Chairperson FROM: Geoffrey L. Beausoleil, Federal Technical Capabilities Panel Agent SUBJECT: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011 Reference: Memorandum from Boardman to Distribution, Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011, dated October 28,2010. Attached are the requested Calendar Year (CY) 2011 Workforce Analysis and Staffing Plan Report for the Pantex Site Office (PXSO). Last year, PXSO was successful in hiring an emergency management and safeguards and security subject matter experts. This year, the PXSO staffing analysis indicates that the need to fill the following job functions: Safeguards & Security, Quality Assurance/Training

28

2010 Annual Workforce Analysis and Staffing Plan Report - YSO  

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

10100) 10100) United States Government Department of Energy National Nuclear Security Administration memorandum DATE: January 19, 2011 REPLY TO ATTN OF Y12-40:Sundie SUBJECT STAFFING PLAN FOR THE NATIONAL NUCLEAR SECURITY ADMINISTRATION Y-12 SITE OFFICE TO: Karen Boardman, Chairman, Federal Technical Capability Panel, National Nuclear Security Administration Service Center, ABQ Reference: Memorandum from Chairperson, Federal Technical Capability Panel to Agents, Annual Workforce Analysis and Staffing Plan Report for Calendar Year (CY) 2010, dated October 28,2010 We have completed our analysis of staffing needs per the guidance in the referenced memorandum. Our revised staffing plan for the YSO is attached. Should you have any questions, please contact Terry Olberding at (865) 576-2550.

29

2010 Annual Workforce Analysis and Staffing Plan Report- NNSA HQ  

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

Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities.

30

2012 Annual Workforce Analysis and Staffing Plan Report - Oak...  

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

ORO Patricia Howse-Smith, AD-44, ORO Butch Brant, AD-443, ORO U.S. Department of Energy Oak Ridge Office 2012 Annual Workforce Analysis and Staffing Plan Report for Federal...

31

Optimizing Call Center Staffing using Simulation and Analytic Center ...  

E-Print Network (OSTI)

Green et al. (2001) coined the term SIPP (stationary, independent, period by period) to describe ... proposed set of staffing levels, and a genetic algorithm to guide the search. ...... A new call cannot enter service until there are fewer calls in

32

2011 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest  

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

1 Annual Workforce Analysis and Staffing Plan Report - Pacific 1 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office 2011 Annual Workforce Analysis and Staffing Plan Report - Pacific Northwest Site Office Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for DOE Federal Technical Capability Panel reporting to the Secretary of Energy summarizing DOE's federal technical capabilities for defense nuclear facility safety assurance.

33

2012 Annual Workforce Analysis and Staffing Plan Report - Carlsbad  

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

United States Government Department of Energy memorandum Carlsbad Field Office Carlsbad , New Mexico 88221 DATE: REPLY TO ATINOF: SUBJECT: JAN 1 8 2013 CBFO:OESH:GTB:ANC:13-0701 :UFC 3410.00 CBFO Annual Workforce Analys is and Staffing Plan rn: Kare n L. Boardman, Chairperson, Federal Techn ical Capability Panel (HS-70) The Carlsbad Field Office (CBFO) has updated the CBFO Annual Workforce Ana lysis and Staffing Plan as of December 31, 2012. The attachment to this Memorandum provides the updated CBFO Workforce Analysis and Staffing information on th e Federal Technica l Capability Program Workforce Staffing and Analys is Report template. If you have questions, please contact Mr. George T. Basabilvazo, CBFO Federal Technical Capability Panel Agent, at (575) 234-7488.

34

2011 Annual Workforce Analysis and Staffing Plan Report - Carlsbad  

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

United States Government United States Government Department of Energy memorandum Carlsbad Field Office Carlsbad, New Mexico 88221 DATE: REPLY TO ATTN OF: SUBJECT: January 19, 2012 CBFO:OOM:GTB:MAG:12-1801 :UFC 3410.00 CBFO Annual Workforce Analysis and Staffing Plan ro: Karen L. Boardman, Chairperson, Federal Technical Capability Panel (HS-70) The Carlsbad Field Office (CBFO) has updated the CBFO Annual Workforce Analysis and Staffing Plan as of December 31, 2011. The attachment to this Memorandum provides the updated CBFO Workforce Analysis and Staffing information on the Federal Technical Capability Program Workforce Staffing and Analysis Report template. If you have questions, please contact Mr. George T. Basabilvazo, CBFO Federal Technical Capability Panel Agent, at (575) 234-7488.

35

2010 Annual Workforce Analysis and Staffing Plan Report - SR  

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

OOEF Jl2$U OOEF Jl2$U United States Government Department of Energy (DOE) memorandum Savannah River Operations Office (SR) DATE: REPLY TO ATTN OF: SUBJECT: JAN 2 6 2011 MGR (Moody/(803) 952-9468) Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2010- 10-NA SC-09 TO: Karen L. Boardman, Chairperson, Federal Technical Capability Panel The Calendar Year 2010 DOE-SR Workforce Analysis and Staffing Plan Report is attached. This analysis was conducted in conjunction with the development of the DOE-SR 5-Year Workforce Management Plan. If you have any questions, please contact me or have your staff contact Mr. Edgar Gates at 803-952-9227 or Mr. Lee Moody at 803-952-5978. MGR:LHM:bcp OHCM-11-1053 Attachment: DOE-SR Annual Workforce Analysis and Staffing Plan Report

36

2012 Annual Workforce Analysis and Staffing Plan Report - Sandia  

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

0. Box 5400 0. Box 5400 Albuquerque, NM 87185 JAi 22 2013 MEMORANDUM FOR: Karen L. Boardman, Chairperson, Federal Technical Capability FROM: SUBJECT: REFERENCE: Panel, NNSA/NTC, HS-70 ~ ~,, / 2 ~~ ~;---~/?;;;:> e · . eauso~~ager Annual Workforce Analysis and Staffing Plan Report for 2012 Boardman memorandum dated October 24, 2012; Subject: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012 Attached is the Sandia Site Office workforce analysis and staffing plan, developed in accordance with the guidance provided in the referenced memorandum. If you have 1questions please contact me at (505) 845-6036 or James Todd, Assistant Manager for Nuclear Operations, at (505) 284-6668. Attachment cc w/attachment:

37

2010 Annual Workforce Analysis and Staffing Plan Report - ORP  

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

Department of Energy memorandum Richland Operations Office DATE: REPLY TO ATTN OF: SUBJECT: TO: JAN 1 9 2011 ENS :JHW 11-ENS-OO 1 THE U.S. DEPARTMENT OF ENERGY (DOE), OFFICE OF RIVER PROTECTION (ORP) ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT Karen L. Boardman, Chairperson Federal Technical Capabilities Panel Reference: Memorandum from K. L. Boardman to Distribution, "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2010 - 10-NA SC-09," dated October 28, 2010. As requested in the Reference, the attached is ORP's Calendar Year (CY) 2010 annual workforce analysis and staffing plan that identify technical capabilities and positions ORP needs to ensure safe operations of ORP assigned defense nuclear facilities. This report is

38

2012 Annual Workforce Analysis and Staffing Plan Report - SR  

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

lllS.81 lllS.81 United States Government Department of Energy (DOE\ memorandum Savannah River Operations Office (SR) DATE: REPLY TO ATINOF: FEB 132811: MGR (Moody/(803) 952-9468) SUBJECT: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012 To: Karen L. Boardman, Chairperson, Federal Technical Capability Panel The Calendar Year 2012 DOE-SR Workforce Analysis and Staffing Plan Report is attached. This analysis was conducted in conjunction with the development of the DOE-SR 5-Y ear Workforce Management Plan. If you have any questions, please contact me or have your staff contact Mr. Edgar Gates at 803-952-9227 or Mrs. Deanna Yates at 803-952-6925. MGR:EG:lec OHCM-13-0025 Attachment: DOE-SR Annual Workforce Analysis and Staffing Plan Report

39

2011 Annual Workforce Analysis and Staffing Plan Report - HSS HQ  

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

2 2 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FROM: SUBJECT: FEDERAL TECHNICAL CAPABILITY PA~EL (FTCP) PATRICIA R. WORTHINGTON, Ph~ 1 ~ DIRECTOR '- OFFICE OF HEALTH AND SAFETY OFFICE OF HEALTH, SAFETY AND SECURITY Office of Health, Safety and Security Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011 In accordance with the guidance memo of October 13, 2011, the Annual Workforce Analysis and Staffing Plan Report for the Office of Health, Safety and Security (HSS), is attached. If you have any questions, please call me at (301) 903-5926 or the HSS Alternate FTCP Agent, Bradley K. Davy, at (301) 903-2473. Attachment @ Printed with soy ink on recycled paper Annual Workforce Analysis and Staffing Plan Report as of December 31, 2011

40

2011 Annual Workforce Analysis and Staffing Plan Report - SR  

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

# # United States Government Department of Energy (DOE) memorandum Savannah River Operations Office (SR) DATE: REPLY TO ATTN OF: SUBJECT: JAN 2 O 2012 MGR (Moody/(803) 952-9468) Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011 - 10-NA SC-09 TO: Karen L. Boardman, Chairperson, Federal Technical Capability Panel The Calendar Year 2011 DOE-SR Workforce Analysis and Staffing Plan Report is attached. This analysis was conducted in conjunction with the development of the DOE-SR 5-Year Workforce Management Plan. If you have any questions, please contact me or have your staff contact Mr. Edgar Gates at 803-952-9227 or Mr. Lee Moody at 803-952-5978. MGR:EG:bcp OHCM-12-1035 Attachment: DOE-SR Annual Workforce Analysis and Staffing Plan Report

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

2011 Annual Workforce Analysis and Staffing Plan Report - Sandia  

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

P.O. Box 5400 P.O. Box 5400 Albuquerque, NM 87185 JAN 2 fl ?.012 MEMORANDUM FOR: Karen Boardman, Chairperson Federal Technical Capability Panel FROM: SUBJECT: REFERENCE: PattyWagner ()~-'\-."~~ ... """ Manager '·~ ·'i \J ~ ,~ ....... Annual Workforce Analysis and Staffing Plan Report for 2011 Boardman Memorandum Dated: October 13, 2011, Subject: Annual Worliforce Analysis and Staffing Plan Report for Calendar Year 2011 The Sandia Site Office (SSO) has completed the workforce analysis and developed a staffing plan in accordance with the guidance provided in the referenced memorandum. The SSO report is attached. Should you have any questions, please contact me at (505) 845-6036 or Jim Todd of my staff at (505) 284-6668.

42

2012 Annual Workforce Analysis and Staffing Plan Report - Livermore  

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

6.W~~l 6.W~~l #II VA. 'lf,fi:'¥Ylj Nsffonal Nuclear Security Admfnfat111tlon Department of Energy National Nuclear Security Administration Livermore Site Office PO Box 808, L-293 7000 East Avenue Livermore, California 94551-0808 !JAN 18 2013 3250 COR-M0-1/17/2013-490077 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL FROM: v KIMBERLY DAVIS LEBAK "/'JJ. f /ti/ MANAGER ~ ..--r; tV[ SUBJECT: REFRENCE: Workforce Analysis and Staffing Plan Report for the Livermore Field Office 2012, Revision I Memorandum (K. Boardman/Distribution), Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012, dated October 24, 2012 Please see the attached revised Workforce Analysis and Staffing Plan Report for the Livermore

43

2010 Annual Workforce Analysis and Staffing Plan Report - LSO  

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

REFRENCE: REFRENCE: U.S. Department of Energy National Nuclear Security Administration Livermore Site Office PO Box 808, L-293 7000 East Avenue Livermore, California 94551-0808 JAN 1 9 2011 ALICE C. WILLIAMS MANAGER 3250 COR-M0-12/2/2010-305229 Annual Workforce Analysis and Staffing Plan Report Memo (K. Boardman/Distribution), Annual Woriforce Analysis and Staffing Plan Report for Calendar Year 2010-10-NA SC-09, dated October 28, 2010 In accordance with the above reference, the Annual Workforce Analysis and Staffing Plan Report for the Livermore Site Office (LSO) are attached. The analysis identified a gap of 2.0 FTE to perform the Federal Safety Assurance Program. Recruitment is in process for the Cyber Security vacancy and the second position shown as vacant will be modified upon approval of a

44

2011 Annual Workforce Analysis and Staffing Plan Report - Oak Ridge  

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

25, 2012 25, 2012 MEMORANDUM FOR KAREN L. BOARDMAN FROM: SUBJECT: CHAIR, FEDERAL TECHNICAL CAPABILITY PANEL JOHN R. ESCHENBERG ~'c:::::~~:-cl~ ACTING MANAGER ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT- CALENDAR YEAR 2011 In accordance with DOE 0 426.1, Federal Technical Capability, I am pleased to provide you with the Oak Ridge Official Annual Workforce Analysis and Staffing Plan Report for calendar year 2011. The analysis follows the Federal Technical Capability Panel guidance. Should you have questions regarding this report, please feel free to contact me at (865) 576-4444 or Larry Kelly at (865) 576-4442. Attachment: 2011 Annual Workforce Analysis and Staffing Plan Report for Federal Technical Personnel cc w/attachment: Larry Kelly, M-2, ORO

45

2012 Annual Workforce Analysis and Staffing Plan Report - LASO  

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

Field Office Field Office Los Alamos, New Mexico 87544 DATE: REPLY TO ATTN OF: SUBJECT: TO: NNSA/DOE JAN 2 8 2013 Juan L. Griego Los Alamos Field Office Work Force Analysis and Staffing Plan Report for Calendar Year 2012 Karen L. Boardman, Chairperson, Federal Technical Capability Panel, HS-50 Reference: 1. HS-50 Memorandum, from Karen L. Boardman, Chairperson, Federal Technical Capability Panel, to Distribution, Subject: Annual Worlforce Analysis and Staffing Plan Report for Calendar Year 2012, dated October 24, 2012 Attached please find the Los Alamos Field Office (NA-00-LA) Work Force Analysis and Staffing Plan Report for Calendar Year 2012. Authorized Full Time Equivalent (FTE) allocation remains less than the number of FTEs required to perform the oversight

46

2012 Annual Workforce Analysis and Staffing Plan Report - HSS HQ  

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

3, 2013 3, 2013 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL (FTCP) FROM: PATRICIA R. WORTHINGTON, Phrf'\vJ DIRECTOR ~ SUBJECT: OFFICE OF HEALTH AND SAFETY OFFICE OF HEALTH, SAFETY AND SECURITY Office of Health, Safety and Security Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012 In accordance with the guidance memo of October 24, 2012, the Annual Workforce Analysis and Staffing Plan Report for the Office of Health, Safety and Security (HSS), is attached. If you have any questions, please call me at (30 I) 903-5926. Attachment @ Printed with soy ink on recycled paper Annual Workforce Analysis and Staffing Plan Report as of December 31, 2012 Reporting Office: Office of Health, Safety and Security

47

2012 Annual Workforce Analysis and Staffing Plan Report - ORP  

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

JAN 1 7·2013 JAN 1 7·2013 DATE: REPLY TO ATTN OF: TRS:JHW 13-TRS-0003 susJECT THE U.S. DEPARTMENT OF ENERGY (DOE), OFFICE OF RIVER PROTECTION (ORP) ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT TO: Karen L. Boardman, Chairperson Federal Technical Capabilities Panel Reference: Memorandum from K. L. Boardman to Distribution, "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012," dated October 24, 2012. As required by DOE 0 426.1, Change 1, "Federal Technical Capability," and the Reference, attached is the ORP's Annual Workforce Analysis and Staffing Plan Report for Calendar Year (CY) 2012. The subject report was prepared in accordance with the reference's guidance and represents the necessary technical resources required to provide oversight of

48

2011 Annual Workforce Analysis and Staffing Plan Report - ORP  

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

DATE: DATE: REPLY TO ATTN OF: SUBJECT: TO: JAN 1 3 201?. ENS:JHW 12-ENS-0001 THE U.S. DEPARTMENT OF ENERGY (DOE), OFFICE OF RIVER PROTECTION (ORP) ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT Karen L. Boardman, Chairperson Federal Technical Capabilities Panel Reference: Memorandum from K. L. Boardman to Distribution, "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011," dated October 13, 2011. In response to your memorandum dated October 13, 2011, attached is the ORP Annual Workforce Analysis and Staffing Plan Report for Calendar Year (CY) 2011. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight and ensure safe operations of ORP' s assigned nuclear facilities.

49

2012 Annual Workforce Analysis and Staffing Plan Report - EM HQ  

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

13 13 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL FROM: MATTHEW B. Mouf h i DEPUTY ASSISTANT SE ARY FOR SUBJECT: SAFETY, SECURITY, AND QUALITY ENVIRONMENTAL MANAGEMENT Annual Workforce Analysis and Staffing Plan Report for Environmental Management The Office of Environmental Management performed a technical workforce analysis per Department of Energy Order 426.1, Federal Technical Capability Order, and your memorandum of October 24, 2012, "Annual Workforce Analysis and Staffing Plan Report of Calendar Year 2012." A summary report, using the template provided in your memorandum, is attached for Federal Technical Capability Panel (FTCP) review and incorporation into the FTCP Annual Report to the Secretary of Energy.

50

Site Office Safety System Oversight Staffing Plan - Blank  

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

Site Office Safety System Oversight Staffing Plan" Site Office Safety System Oversight Staffing Plan" "Date" "ACTIVITIES","Days for Activity in each Fiscal Year",,,,,,"Notes" ,"FY09","FY10","FY11","FY12","FY13","FY14" "Program Tasks" "Total Task Days",0,0,0,0,0,0,"Number of days required for activities that need to be completed regardless of number of staff" "Individual Tasks" "Qualification Training" "Continuing Training" "Collateral Duties" "Administrative" "Leave, Holidays" "Total Individual Days",0,0,0,0,0,0,"Number of days required for activities that need to be completed by each individual"

51

2012 Annual Workforce Analysis and Staffing Plan Report - PNSO  

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

of Energy of Energy Pacific Northwest Site Office P.O. Box 350, K9-42 Richland, Washington 99352 13-PNSO-0073 JAN 07 2013 MEMORANDUM FOR KAREN L. BOARDMAN, CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL NATIONAL TRAINING CENTER, HS-50 FROM: SUBJECT: ROGER E. SNYD MANAGER " C ANALYSIS AND STAFFING PLAN REPORT FOR CY 2012 PACIFIC NORTHWEST SITE OFFICE In response to your memorandum dated October 24, 2012, attached is the Pacific Northwest Site Office (PNSO) Annual Workforce Analysis and Staffing Plan Report for CY 2012. The subject

52

Funding and Federal Staffing Requirements Funding Summary (Energy Supply)  

E-Print Network (OSTI)

. . . . . . . 1,367 8,000 4,000 -4,000 -50.0% Wind Energy Technology Viability . . . . . . . . . . . 23,411 29Funding and Federal Staffing Requirements Funding Summary (Energy Supply) (dollars in thousands) FY.6% Solar Energy Concentrating Solar Power . . . . . . 13,025 1,932 0 -1,932 -100.0% Photovoltaic Energy

53

2010 Annual Workforce Analysis and Staffing Plan Report - PNSO  

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

E E ^ ^ Department of Energy % fS, sg r/ Pacific Northwest Site Office / %1 ^ P.O.Box350,K9-42 #* » . c: ^ % ^ Richland, Washington 99352 .r ^ 3DEC 8 2010 ll-PNSO-0090 MEMORANDUM FORK. L. BOARDMAN, CHAIRPERSON i FEDERAL TECHNICAL CAPABILITY PANEL WEI^ i it / la FROM: MICHAEL J. MANAGER SUBJECT: ANALYSIS AND STAFFING PLAN REPORT FOR CY 2010 PACIFIC NORTHWEST SITE OFFICE In response to your memorandum dated October 28, 2010, attached is the Pacific Northwest Site Office (PNSO) Annual Workforce Analysis and Staffing Plan Report for CY 2010. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight of the Pacific Northwest National Laboratory Defense Nuclear Facility known as Hanford Building 325. If you have any questions, please contact me, or you may also contact Roger Christensen, PNSO

54

2012 Annual Workforce Analysis and Staffing Plan Report - SC HQ  

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

Washington, DC 20585 Washington, DC 20585 MEMORANDUM TO KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAP ABILITY PANEL FROM: 1osEPH A. MCBREA a wi.~ '/t'f // c. DEPUTY DIRECT FOR FIELD OPE~ TIONS OFFICE OF SCIE CE SUBJECT: Annual Workforce Ail ysis and Staffing Plan Report for Calendar Year 2012 In response to your memo dated October 24, 2012, enclosed is the Office of Science (SC) Headquarters Workforce Analysis and Staffing Plan Report for Calendar Year 2012. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight of Building 325 at Pacific Northwest National Laboratory, the only defense nuclear facility overseen by SC-Headquarters. If you have any questions, please contact me, or you may contact Carol Sohn at

55

2011 Annual Workforce Analysis and Staffing Plan Report - SC HQ  

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

Deputy Director for Field Operations Deputy Director for Field Operations Office of Science Washington, DC 20585 December 15, 2011 MEMORANDUM FOR KAREN L. BOARDMAN, CHAIR FEDERAL TECHNICAL CAPABILITY PANEL I tlVM £]{ -.,;A 1 i-f:..-f'l FROM: JOSEPH A. MCBREARTY' ,____.- ~ SUBJECT: DEPUTY DIRECTOR F Fl D OPERATIONS Annual Workforce Ana ysis and Staffing Plan Report for Calendar Year 2011 In response to your memo dated October 13, 2011, enclosed is the Office of Science (SC) Headquarters Workforce Analysis and Staffing Plan Report for Calendar Year 2011. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight of Building 325 at Pacific Northwest National Laboratory, the only defense nuclear facility overseen by

56

2011 Annual Workforce Analysis and Staffing Plan Report - EM HQ  

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

KAREN L. BOARDMAN KAREN L. BOARDMAN CHAIRPERSON FROM: SUBJECT: FEDERAL TECHNICAL MATTHEW B. MOUR DEPUTY ASSISTANT S SAFETY AND SECUR Y PROGRAM ENVIRONMENTAL MANAGEMENT Annual Workforce Analysis and Staffing Plan Report for Environmental Management The Office of Environmental Management performed a technical workforce analysis per DOE 0 426.1, Federal Technical Capability Order, and your memorandum of October 13 2011, "Annual Workforce Analysis and Staffing Plan Report of Calendar Year 2011." A summary report, using the template provided in your memorandum, is attached for Federal Technical Capability Panel (FTCP) review and incorporation into the FTCP Annual Report to the Secretary of Energy. If you any questions, please contact me at (202) 586-5151.

57

2010 Annual Workforce Analysis and Staffing Plan Report - SC HQ  

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

Off ice of Science Off ice of Science Washington, DC 20585 December 15, 2010 MEMORANDUM TO KAREN L. BOARDMAN CHAIRPERSON FROM: SUBJECT: FEDERAL TECHNICAL CAP ABILITY PANEL Annual Workforce Analysis and Staffing Plan Report for Calendar Year 20 l 0 In response to your memo dated October 28, 2010, enclosed is the Office of Science (SC) Headquarters Workforce Analysis and Staffing Plan Report for Calendar Year 2010. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight of Building 325 at Pacific Northwest National Laboratory, the only defense nuclear facility overseen by SC-Headquarters. If you have any questions regarding this memorandum, please contact Carol Sohn at carol.sohn@pnso.science.doe.gov or (509) 375-2320.

58

2012 Annual Workforce Analysis and Staffing Plan Report - EM CBC  

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

FEB 6 FEB 6 REPLY IO ATTN OF: EMCBC:MARCUS EMCBC-00296-13 sus1Ecr: ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORTS FOR CALENDAR YEAR 2012 IO: Karen Boardman, Chairperson, Federal Technical Capability Panel The purpose of this memorandum is to transmit the requested Analysis and Staffing Plans per the memorandum dated October 24, 2012 with the same Subject. The Environmental Management Consolidated Business Center (EMCBC) provides the U.S. Department of Energy's Office of Environmental Management (EM) with a full range of business and technical support services using a strategic model to that used by other field sites. The EMCBC Technical Support and Services resides in the Office of Technical Support and Asset Management (OTSAM). The full-time equivalent (FTE) referenced in the

59

2012 Annual Workforce Analysis and Staffing Plan Report - PPPO  

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

Annual Workforce Analysis and Staffing Plan Report Annual Workforce Analysis and Staffing Plan Report as of December 31, 2012 Reporting Office: Portsmouth/Paducah Project Office Section 1: Current Mission(s) of the Organization and Potential Changes The PPPO mission is to effectively implement EM responsibilities, obligations and activities at the Department's Portsmouth, Ohio and Paducah, Kentucky, sites:  Accomplish environmental remediation actions in compliance with regulatory milestones and agreements.  Disposition legacy and newly generated waste.  Operations of Depleted Uranium Hexafluoride Conversion Facilities at both sites.  Perform Decontamination and Decommissioning of the Portsmouth Gaseous Diffusion Plant The PPPO Manager serves as the line manager reporting to the Assistant Secretary for Environmental

60

2011 Annual Workforce Analysis and Staffing Plan Report - EM CBC  

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

9 2012 9 2012 REPLY TO ATTN OF: EM CBC: BOYD EMCBC-00283-12 suBrncr: ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORTS FOR CALENDAR YEAR2011 TO: Karen Boardman, Chairperson, Federal Technical Capability Panel The Environmental Management Consolidated Business Center (EMCBC) does not have a fixed set of facilities. The responsibilities requiring technical staffing vary from year to year depending upon supported project activities. The types and magnitude of the EM CBC technical capabilities currently needed for safe operations is dictated by the responsibility to provide surveillance and maintenance activities, support and oversee environmental cleanup, and transition of facilities at the Brookhaven National Laboratory (BNL); Grand Junction/Moab UMTRA Project; Separations Process Research

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

2012 Annual Workforce Analysis and Staffing Plan Report - SRSO  

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

8 8 United States Government National Nuclear Security Administration Staffing Plan Report TO: Karen L. Boardman, Chairperson, Federal Technical Capability Panel (FTCP), NNSA Service Center In response to your October 24, 2012, memorandum, we have conducted a staffing analysis for the SRSO. This analysis was conducted in accordance with the models and guidance provided at the FTCP website. We have also completed the attached tables as requested. As SRSO is co-located on an Environmental Management landlord site, we rely on the Savannah River Operations Office for matrix support for certain functions due to the limited number of

62

2010 Annual Workforce Analysis and Staffing Plan Report - NNSA SC  

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

ATTACHMENT 1 ATTACHMENT 1 1 Annual Workforce Analysis and Staffing Plan Report Draft as of December 31, 2010 Reporting Office: NNSA SC (NZ) Section One: Current Mission(s) of the Organization and Potential Changes NNSA Mission: To strengthen United States security through the military application of nuclear energy and by reducing the global threat from terrorism and weapons of mass destruction. NNSA Vision: To be an integrated nuclear security enterprise operating an efficient and agile nuclear weapons complex, recognized as preeminent in technical leadership and program management. NNSA Service Center Mission: Provide responsive business, technical, financial, legal, and management advice and services to successfully accomplish the NNSA mission. NNSA Service Center Vision:

63

2010 Annual Workforce Analysis and Staffing Plan Report - EM CBC  

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

Page 1 of 4 Page 1 of 4 Annual Workforce Analysis and Staffing Plan Report As of December 31, 2010 Reporting Office EM Consolidated Business Center Section One: Current Mission(s) of the Organization and Potential Changes The EM Consolidated Business Center (EMCBC) provides the U.S. Department of Energy's Office of Environmental Management project sites with a full range of business support services using a strategic model similar to that used by other DOE field sites, as well as logistics management and technical assistance. Attributes of the model include the following: (1) stable business support for a variety of customers with differing project mission requirements and different business support priorities;(2) Combined use of federal employees and support service contractors (as required) to support customer needs, and (3) Optimization of

64

2011 Annual Workforce Analysis and Staffing Plan Report - PNSO  

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

-PNS0-0071 -PNS0-0071 Department of Energy Pacific Northwest Site Office P.O. Box 350, K9-42 Richland, Washington 99352 DEC 1 6 2011 MEMORANDUM FOR KAREN L. BOARDMAN, CHAIRPERSON FEDERAL TECHNICAL CAP ABILITY PANEL FROM: SUBJECT: ANALYSIS AND STAFFIN PLAN REPORT FOR CY 2011 - PACIFIC NORTHWEST SITE OFFICE (PNSO) In response to your memorandum dated October 13, 2011, attached is the PNSO Annual Workforce Analysis and Staffing Plan Report for CY 2011. The subject report was prepared in accordance with your guidance and represents the necessary resources required to provide oversight of the Pacific Northwest National Laboratory Defense Nuclear Facility known as Hanford Building 325. If you have any questions, please contact me, or your staff may contact Ted Pietrok, FTCP

65

2010 Annual Workforce Analysis and Staffing Plan Report - Oak Ridge  

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

February 9, 2011 February 9, 2011 FROM: SUBJECT: In accordance with DOE 0426.1, Federal Technical Capability, I am pleased to provide you with the Oak Ridge Office Annual Workforce Analysis and Staffmg Plan Report for Calendar Year 2010. The analysis follows the Federal Technical Capability Panel guidance. Should you have questions regarding this report, please feel free to contact me at (865) 576-4444 or Larry Kelly at (865) 576-0891. Attachment: 2010 Annual Workforce Analysis and Staffing Plan Report for Federal Technical Personnel cc w/attachment: R.J. Brown, M-2, ORO Susan Cange, NS-50, ORO Pauline Douglas, OS-20, ORO John Eschenberg, EM-90, ORO Larry Kelly, SE-30, ORO Johnny Moore, SC-IO, ORO John Shewairy, AD-40, ORO Patricia Howse-Smith, AD-44, ORO Butch Brant, AD-443, ORO

66

Microsoft Word - DOE_Staffing_Study_Cover.doc  

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

CONTRACT AND PROJECT MANAGEMENT CONTRACT AND PROJECT MANAGEMENT ROOT CAUSE ANALYSIS CORRECTIVE ACTION PLAN CORRECTIVE MEASURE 2 CONTRACT AND PROJECT MANAGEMENT STAFFING STUDY SUMMARY REPORT JULY 2009 iii Executive Summary In April 2008 the Department of Energy (DOE) published the U.S. Department of Energy Contract and Project Management Root Cause Analysis, and then subsequently published the U.S. Department of Energy Contract and Project Management Root Cause Analysis Corrective Action Plan in July 2008. The root cause analysis identified the most significant challenges impeding the improvement of DOE contract and project management. One of the most significant issues identified was that, in many cases, DOE did not have an adequate number of federal personnel with the appropriate skills to plan,

67

2011 Annual Workforce Analysis and Staffing Plan Report - Idaho Operations Office  

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

January 19~ 2012 Subject: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011 (OS-DM-12-004) To: Karen L. Boardman, Chairperson Federal Technical Capability Panel National Nuclear Security Administration Reference: Memorandum, Karen Boardman to Distribution, "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011," dated October 13,2011 In accordance with direction in the reference, the Department of Energy, Idaho Operations Office (DOE-ID) performed a workforce analysis and developed an Annual Workforce Analysis and Staffing Report. The Report is hereby submitted for the Federal Technical Capability Program (FTCP) review and incorporation into the FTCP Annual Report to the Secretary.

68

Approximate diagonalization  

E-Print Network (OSTI)

Abstract. We describe a new method of computing functions of highly non-normal matrices, by using the concept of approximate diagonalization. We formulate a conjecture about its efficiency, and provide both theoretical and numerical evidence in support of the conjecture. We apply the method to compute arbitrary real powers of highly non-normal matrices. Key words. Jordan matrices, ill-posedness, regularization, fractional powers, functional calculus, spectral theory.

E B Davies

2007-01-01T23:59:59.000Z

69

Audit of Staffing Requirements for the Strategic Petroleum Reserve, IG-0370  

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

1995 1995 IG-1 INFORMATION: Report on "Audit of Staffing Requirements for the Strategic Petroleum Reserve" The Secretary BACKGROUND: The audit was undertaken in response to a request from the Deputy Secretary of Energy to determine whether current staffing levels for the Reserve were necessary to effectively accomplish current and future anticipated mission requirements. As of May 31, 1994, over 1,650 full-time equivalents were employed by the Department and its contractors to manage and operate Strategic Petroleum Reserve (Reserve) programs. DISCUSSION: We compared Reserve performance levels and staffing practices with those for similar functions in the private sector and other DOE contractors. The audit disclosed that the Reserve staffing levels

70

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA Production Office  

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

t.Jt'S~l t.Jt'S~l National Nuclear Security Administration U.S. Department of Energy NNSA ProductiOn Office Post Off1ce Box 2050 Oak Ridge. Tennessee 37831-8009 FEB -7 2013 MEMORANDUMFORKARENBOARDMAN CHAIRPERSON FROM: SUBJECT: REFERENCE: FEDERAL TECHNICAL CAP ABIL KENNETH A. HOAR ASSISTANT MANAGER ENVIRONMENT, SAFET Staffing Plan for the National Nu ear Security Administration Production Office DOE Memorandum, ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT FOR CALENDAR YEAR (CY) 2012, Boardman/Agents, dated October 24, 2012 We have completed our analysis of staffing needs per the guidance in the referenced memorandum. Our revised staffing plan for the NNSA Production Office is attached. Should you have any questions, please contact me at (806) 4 77-7158 or Susan Morris at

71

2012 Annual Workforce Analysis and Staffing Plan Report- Oak Ridge Office  

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

Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities.

72

2012 Annual Workforce Analysis and Staffing Plan Report- Nuclear Energy Oak Ridge Site Office  

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

Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities.

73

2011 Annual Workforce Analysis and Staffing Plan Report- Savannah River Site Office  

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

Managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities.

74

Integrated Service System Staffing and Scheduling via Stochastic ...  

E-Print Network (OSTI)

Oct 14, 2013 ... Rostering: Assigning employees to the shifts. ... within a period is based on the static and fluid approximation introduced in [12] and analyzed in...

75

2012 Annual Workforce Analysis and Staffing Plan Report - Idaho Operations Office  

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

4, 2013 4, 2013 Subject: Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012 (EM-NSPD-13-003) To: Karen L. Boardman, Chairman Federal Technical Capability Panel National Nuclear Security Administration Reference: Memorandum, Karen Boardman to Distribution, "Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012," dated October 24, 2012 In accordance with direction in the reference, the Department of Energy, Idaho Operations Office (DOE-ID) performed a workforce analysis and developed an Annual Workforce Analysis and Staffing Report. The Report is herby submitted for the Federal Technical Capability Program (FTCP) review and incorporation into the FTCP Annual Report to the Secretary. Questions may be addressed to the DOE-ID FTCP Agent, Mark C. Brown at (208) 526-

76

2012 Annual Workforce Analysis and Staffing Plan Report - Nuclear Energy Oak Ridge Site Office  

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

Nuclear Energy Oak Ridge Site Office Nuclear Energy Oak Ridge Site Office 2012 Annual Workforce Analysis and Staffing Plan Report for Federal Technical Personnel January 2013 DOENE-ORSO CONCURRENCE AND APPROVAL CONCURRENCE: Marianne Heiskell, Lease and Technical Management Branch Chief Nuclear Energy Oak Ridge Site Office Randy DeVault, Regulatory Management Branch Chief, NE-ORSO Nucl~ffic ,___.~,. Larry Perkins, Deputy Manager, Nuclear Energy Oak Ridge Site Office APPROVAL: January 2013 2012 Annual Workforce Analysis and Staffing Plan Report Date I /v/13 Date! 1/~3/13 Date ,;:L :/ /. * ~ Page ii DOENE-ORSO Table of Contents Section 1: Current Mission(s) of the Organization and Potential Changes Section 2: Technical Staffing Section 3: Current Shortages and Plans for Filling

77

*Activity Station Staffing Hunting Station Atlatl (Mr. Boston, Mr. Lilly), Flint knapping  

E-Print Network (OSTI)

*Activity Station Staffing Hunting Station ­ Atlatl (Mr. Boston, Mr. Lilly), Flint knapping (Ms arrive Letchworth-Love Mounds State Park 9:10- 9:45 Red Group Hunting station: atlatl throwing, flint, flint knapping demo, skinning demo*(See back page) Yellow Group Cordage station: wrist or ankle bracelet

Florida, University of

78

2011 Annual Workforce Analysis and Staffing Plan Report - NNSA for Safety and Health  

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

Annual Workforce Analysis and Staffing Plan Report Annual Workforce Analysis and Staffing Plan Report As of December 31, 2011 Reporting Office: NNSA NA-SH Section One: Current Mission(s) of the Organization and Potential Changes The Office of the Associate Administrator for Safety and Health (NA-SH) provides mission enabling support to the NNSA Administrator, Central Technical Authority (CTA), Acquisition Executives, senior NNSA officials, program officers and site offices. NA-SH enables other NNSA organizations to fulfill NNSA missions while protecting the environment and safeguarding the safety and health of the public and the workforce. Section Two: SITE CHARACTERISTICS TABLE 1 Number of Hazard Category 1, 2, or 3 Nuclear Facilities: HC 1: 0; HC 2: 0; HC 3: 0 Number of Radiological Facilities

79

2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ NA-70  

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

Annual Workforce Analysis and Staffing Plan Report Annual Workforce Analysis and Staffing Plan Report As of December 31, 2011 Reporting Office: NNSA NA-70 Section One: Current Mission(s) of the Organization and Potential Changes 1. DNS is the NNSA line management organization responsible for security direction and program management with respect to prioritization of resources, program evaluation, and funding allocation. Key management areas include security operations, resources, engineering, and technical support to NNSA field elements and facilities. Specific subject matter expertise also includes physical and personnel security, protective forces, nuclear materials control and accountability, classified and sensitive information protection, and technical security programs. DNS evaluates the status of protection programs at all NNSA facilities against National policy and

80

2012 Annual Workforce Analysis and Staffing Plan Report - Oak Ridge Office of Environmental Management  

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

18, 2013 18, 2013 MEMORANDUM FOR KAREN L. BOARDM AN CHAIRP ERSON rROM: SU BJ ECT: REFERENCE: FEDE RAL TECHN ICA L CAPABILITIES PANEL MARK WI IITNEY It J I MAN AG ER VV"-c.--'\<.- OAK RIDGE OFFICE or ENV IRONMENT/\L M~ OAK RIDG E OFFICE OF ENVIRONMENT/\ L M/\NAGEMENT ANNUAL WORKFORCE ANAL YSJS AND STAFFING REPORT Memorandum from Karen L. Boardman to Distribution, Annual Workfhrce Analysis and Stqfftng Plan Report f(Jr Calendar Year 20 12, dated October 24, 20 12 As requested, attached is the Oak Ridge Office of Environmental Manage ment (OREM) Calendar Year 2012 annual workforce anal ys is and staffing plan th at identifi es the technica l capabil iti es and pos itions ORe:M needs to ensure safe operations of OREM assigned nuc lear faci liti es. This report is submitted for incorporation into the Federa

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

FY 2012 Annual Workforce Analysis and Staffing Plan Report - NNSA NSO  

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

93-8518 93-8518 JAN 162m3 Karen L. Boardman, Chairperson, Federal Technical Capability Panel, DOE National Training Center, (HS-50) Albuquerque, NM NATIONAL NUCLEAR SECURITY ADMINISTRATION NEVADA SITE OFFICE (NNSAINSO}ANNUAL WORKFORCE ANALYSIS AND STAFFING PLAN REPORT Please find enclosed the NNSA/NSO Fiscal Year (FY) 2013 Annual Workforce Analysis and Staffing Plan Report. It conforms to your guidance dated October 24, 2012. In summary, the current shortages at NNSA/NSO are: High Priority None Medium Priority None Other Positions 0.25 Civil/Structural Engineering FTE 0.25 Construction Management FTE The enclosed plan outlines our strategy to meet these requirements in FY 2013. If you have any questions regarding this plan, please contact Barry Mellor at (702) 295-1456.

82

Facility location: distributed approximation  

Science Conference Proceedings (OSTI)

In this paper, we initiate the study of the approximability of the facility location problem in a distributed setting. In particular, we explore a trade-off between the amount of communication and the resulting approximation ratio. We give a distributed ... Keywords: distributed approximation, facility location, linear programming, primal-dual algorithms

Thomas Moscibroda; Rogert Wattenhofer

2005-07-01T23:59:59.000Z

83

March 29, 2011, Federal Technical Capabilities Panel Face-to-Face Meeting - SSO Staffing Analysis: An Alternate Method  

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

SSO SSO Staffing Analysis SSO Staffing Analysis An Alternate Method Presented to the Federal Technical Capability Panel M h 29 2011 March 29, 2011 1 Requirement Requirement DOE O 426.1 - "Senior managers must DOE O 426.1 Senior managers must conduct annual workforce analyses of their organizations and develop staffing plans that identify critical technical capabilities and positions that ensure safe operations of d f l f iliti " defense nuclear facilities." The FTCP Chair sends out a call for the Workforce Analysis and includes a template Workforce Analysis and includes a template for determining the number of SSO personnel required at each site 2 required at each site. Annual Workforce Analysis Memo Annual Workforce Analysis Memo Site summaries are the basis for the FTCP

84

Staffing Studies  

Science Conference Proceedings (OSTI)

... and how personnel are deployed at the scene, says lead researcher Jason ... funded by the US Department of Homeland Security and led by the ...

2013-07-16T23:59:59.000Z

85

Approximation of Stochastic Process  

E-Print Network (OSTI)

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

86

2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ NA-10  

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

printed 2/17/2012 2:23:00 PM Page 1 of 8 printed 2/17/2012 2:23:00 PM Page 1 of 8 Annual Workforce Analysis and Staffing Plan Report As of December 31, 2011 Reporting Office: NNSA NA-10 HQ (including NA-15 inputs) Section One: Current Mission(s) of the Organization and Potential Changes NNSA Mission: To strengthen United States security through the military application of nuclear energy. NNSA Vision: To be an integrated nuclear security enterprise operating an efficient and agile nuclear weapons complex, recognized as preeminent in technical leadership and program management. Organizational Changes: NNSA is in the final phase of re-organizing. This plan reflects known changes that resulted from the elimination of the ABQ Service Center and re-distribution of the functions and personnel, some of whom were part of the TQP Program. The plan has also

87

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA for Safety and Health - NA-26  

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

1 Annual Workforce Analysis and Staffing Plan Report Draft as of December 31, 2012 Reporting Office: _NA-26 Office of Fissile Material Disposition at SRS____ Section 1: Current Mission(s) of the Organization and Potential Changes 1. The Office of Fissile Material Disposition (NA-26) is part of the National Nuclear Security Administration (NNSA). NA-26 supports NNSA Strategic Plan Goal #2, "Provide technical leadership to limit or prevent the spread of materials, technology, and expertise relating to weapons of mass destruction; advance the technologies to detect the proliferation of weapons of mass destruction worldwide, and eliminate or secure inventories of surplus materials and infrastructure usable for nuclear weapons." The NA-26 organization focuses on the safe and secure disposition of

88

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA NA-00 and NA-10  

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

Last printed 1/24/2013 10:50:00 AM Page 1 of 12 Last printed 1/24/2013 10:50:00 AM Page 1 of 12 Part 1. NA-00/NA-10/NA-15 Input Annual Workforce Analysis and Staffing Plan Report As of December 31, 2012 Reporting Offices: NNSA NA-10 HQ (including NA-15 inputs) and NA-00 (while transitioning to new organizational structure) Section One: Current Mission(s) of the Organization and Potential Changes NNSA Mission: To strengthen United States security through the military application of nuclear energy. NNSA Vision: To be an integrated nuclear security enterprise operating an efficient and agile nuclear weapons complex, recognized as preeminent in technical leadership and program management. Organizational Changes: NNSA is in the final phase of another re-organization that will split NA- 10 and establish an independent office, NA-00, to oversee the NNSA sites and other non-weapons-

89

Microsoft Word - CNS CY 2010 Annual Workforce Analysis and Staffing Plan  

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

Attachment 1 Attachment 1 Annual Workforce Analysis and Staffing Plan Report as of December 31, 2010 Reporting Office of the Chief of Nuclear Safety (CNS) Section One: Current Mission of the Organization and Potential Changes Revision 2 of U.S. Department of Energy Implementation Plan for DNFSB Recommendation 2004-1 established the seven core CTA responsibilities. The Office of the Chief of Nuclear Safety (CNS) performs to following functions in support of the CTA meeting these responsibilities: 1. Nuclear Safety Requirement Concurrence and Exemption * Concur with the determination of the applicability of DOE directives involving nuclear safety included in Energy and Science contracts pursuant to Department of Energy Acquisition Regulation (DEAR), 48 CFR 970.5204-2, Laws, regulations, and

90

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA NA-70  

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

7 7 Annual Workforce Analysis and Staffing Plan Report As of December 31, 2012 Reporting Office: NNSA NA-70 Section One: Current Mission(s) of the Organization and Potential Changes The DNS core mission is to protect NNSA capabilities, facilities, materials, information, and employees. DNS is responsible for managing and funding the security that supports the NNSA missions, with the exception of those missions under the Office of Naval Reactors and the Office of Secure Transportation's (OST) over-the-road operations. DNS also provides unique knowledge and expertise in nuclear security for a broader set of 21st century national security needs that are synergistic with its mission, such as those in nuclear non-proliferation, homeland security, and intelligence. DNS provides the overall

91

2012 Annual Workforce Analysis and Staffing Plan Report - West Valley Demonstration Project  

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

ATTACHMENT ATTACHMENT 1 Annual Workforce Analysis and Staffing Plan Report As ofDecember 31, 2012 Reporting Office: West Valley Demonstration Project Section 1: Current Mission(s) of the Organization and Potential Changes The mission of the WVDP as defined by the West Valley Demonstration Project Act (Public Law 96-368) is to accomplish five activities: 1) solidify high-level radioactive waste (HLW), 2) develop containers suitable for permanent disposal of the HLW, 3) transport the HLW to a Federal repository for permanent disposal, 4) dispose of low-level and transuranic waste produced by the solidification of the HLW, and 5) decontaminate and decommission the HLW tanks and facilities, materials and hardware used to solidify the HLW. DOE expects to accomplish these WVDP activities through proactive leadership, management, and implementation of safe and environmentally sound operations.

92

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA for Safety and Health  

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

1 1 Annual Workforce Analysis and Staffing Plan Report as of December 31, 2012 Reporting Office: NNSA NA-SH Section 1: Current Mission(s) of the Organization and Potential Changes The Office of the Associate Administrator for Safety and Health (NA-SH) provides mission enabling support to the NNSA Administrator, Central Technical Authority (CTA), Acquisition Executives, senior NNSA officials, program officers and site offices. NA-SH enables other NNSA organizations to fulfill NNSA missions while protecting the environment and safeguarding the safety and health of the public and the workforce. Section 2: SITE CHARACTERISTICS TABLE 1 Number of Hazard Category 1, 2, or 3 Nuclear Facilities: HC 1:_0_; HC 2: _0_; HC 3: _0_. Number of Radiological Facilities

93

delta-Approximable Functions  

Science Conference Proceedings (OSTI)

In this paper we study several notions of approximability of functions in the framework of the BSS model. Denoting with M the function computed by a BSS machine M when its comparisons are against - rather than 0, we study ...

Charles Meyssonnier; Paolo Boldi; Sebastiano Vigna

2000-09-01T23:59:59.000Z

94

2011 Workforce Analysis and Staffing Plan Report Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP  

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

l9l l9l National Nuclear Security Adminis tration MEMORANDUM FOR FROM: SUBJECT: Department of Energy National Nuclear Security Administration Service Center P. 0. Box 5400 Albuquerque, NM 87185 OCT 1 3 2011 Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2011 The Department of Energy Federal Technical Capability Order, DOE 0 426.1 , requires that managers perform an annual workforce analysis of their organization and develop staffing plans that identify technical capabilities and positions they need to ensure safe operation of defense nuclear facilities. This workforce analysis process continues to cover technical capability needs to address defense nuclear facility and related operational hazards. Individual site summaries developed at the end of each year are a basis for the Federal Technical Capability Panel (FTCP)

95

The Nuclear Education and Staffing Challenge: Rebuilding Critical Skills in Nuclear Science and Technology.  

SciTech Connect

The United States, the Department of Energy (DOE) and its National Laboratories, including the Pacific Northwest National Laboratory (PNNL), are facing a serious attrition of nuclear scientists and engineers and their capabilities through the effects of aging staff. Within the DOE laboratories, 75% of nuclear personnel will be eligible to retire by 2010. It is expected that there will be a significant loss of senior nuclear science and technology staff at PNNL within five years. PNNL's nuclear legacy is firmly rooted in the DOE Hanford site, the World War II Manhattan Project, and subsequent programs. Historically, PNNL was a laboratory where 70% of its activities were nuclear/radiological, and now just under 50% of its current business science and technology are nuclear and radiologically oriented. Programs in the areas of Nuclear Legacies, Global Security, Nonproliferation, Homeland Security and National Defense, Radiobiology and Nuclear Energy still involve more than 1,000 of the 3,800 current laboratory staff, and these include more than 420 staff who are certified as nuclear/radiological scientists and engineers. This paper presents the current challenges faced by PNNL that require an emerging strategy to solve the nuclear staffing issues through the maintenance and replenishment of the human nuclear capital needed to support PNNL nuclear science and technology programs.

Wogman, Ned A.; Bond, Leonard J.; Waltar, Alan E.; Leber, R. E.

2005-01-01T23:59:59.000Z

96

The Nuclear Education and Staffing Challenge: Rebuilding Critical Skills in Nuclear Science and Technology  

SciTech Connect

The United States, the Department of Energy (DOE) and its National Laboratories, including the Pacific Northwest National Laboratory (PNNL), are facing a serious attrition of nuclear scientists and engineers and their capabilities through the effects of aging staff. Within the DOE laboratories, 75% of nuclear personnel will be eligible to retire by 2010. It is expected that there will be a significant loss of senior nuclear science and technology staff at PNNL within five years. PNNL's nuclear legacy is firmly rooted in the DOE Hanford site, the World War II Manhattan Project, and subsequent programs. Historically, PNNL was a laboratory were 70% of its activities were nuclear/radiological, and now just under 50% of its current business science and technology are nuclear and radiologically oriented. Programs in the areas of Nuclear Legacies, Global Security, Nonproliferation, Homeland Security and National Defense, Radiobiology and Nuclear Energy still involve more than 1,000 of the 3,800 current laboratory staff, and these include more than 420 staff who are certified as nuclear/radiological scientists and engineers. This paper presents the current challenges faced by PNNL that require an emerging strategy to solve the nuclear staffing issues through the maintenance and replenishment of the human nuclear capital needed to support PNNL nuclear science and technology programs.

Wogman, Ned A.; Bond, Leonard J.; Waltar, Alan E.; Leber, R E.

2005-01-01T23:59:59.000Z

97

The Nuclear Education and Staffing Challenge: Rebuilding Critical Skills in Nuclear Science and Technology.  

SciTech Connect

The United States, the Department of Energy (DOE) and its National Laboratories, including the Pacific Northwest National Laboratory (PNNL), are facing a serious attrition of nuclear scientists and engineers and their capabilities through the effects of aging staff. Within the DOE laboratories, 75% of nuclear personnel will be eligible to retire by 2010. It is expected that there will be a significant loss of senior nuclear science and technology staff at PNNL within five years. PNNL's nuclear legacy is firmly rooted in the DOE Hanford site, the World War II Manhattan Project, and subsequent programs. Historically, PNNL was a laboratory where 70% of its activities were nuclear/radiological, and now just under 50% of its current business science and technology are nuclear and radiologically oriented. Programs in the areas of Nuclear Legacies, Global Security, Nonproliferation, Homeland Security and National Defense, Radiobiology and Nuclear Energy still involve more than 1,000 of the 3,800 current laboratory staff, and these include more than 420 staff who are certified as nuclear/radiological scientists and engineers. This paper presents the current challenges faced by PNNL that require an emerging strategy to solve the nuclear staffing issues through the maintenance and replenishment of the human nuclear capital needed to support PNNL nuclear science and technology programs.

Wogman, Ned A.; Bond, Leonard J.; Waltar, Alan E.; Leber, R. E.

2005-01-01T23:59:59.000Z

98

2010 Workforce Analysis and Staffing Plan Report Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP  

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

Page 1 of 4 Page 1 of 4 Attachment 1 Annual Workforce Analysis and Staffing Plan Report as of December 31, 2010 Reporting Office _____________________ This is a template. Explanatory/example wording not in bold type should be deleted for the report. Section One: Current Mission(s) of the Organization and Potential Changes 1. Provide several bullets that frame the types and magnitude of technical capabilities currently needed for safe operations in your sites hazardous facilities (non-nuclear and nuclear facilities including radiological facilities) or activities. For example: * Three major operating Category II and III nuclear facilities; * four significant nuclear facilities undergoing Decontamination and Decommissioning (D&D);

99

Scaled hydrogenic approximation wavefunctions. [Hartree-Fock approximation  

DOE Green Energy (OSTI)

Although widespread use of computer codes for the solution of Schrodinger equations makes available numerical Hartree-Fock model radial wave functions, there remains persistant interest in simple analytic expressions for atomic wave functions. One such frequency favored approach employs hydrogenic functions, suitably scaled, as approximate wave functions. The following note displays typical inaccuracies to be expected from such approximations. 13 references.

Shore, B.W.

1979-09-01T23:59:59.000Z

100

2012 Workforce Analysis and Staffing Plan Report Memo and Workforce Analysis Guidance for FR, SSO, STSM & TQP  

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

Albuquerque. NM 87185-5400 Albuquerque. NM 87185-5400 October 24, 2012 ~'IE1vlORl\NDUM FOR DI." 'RllH~'Tl( ~ i 1"1 ··1/_,,.JX-t/rd/1uv1< ... _/ FROM: K1 REN i?'H,oAT~T)ivl!\N SUBJECT: CHAIRPERSON FFDERJ\L TECHNICAi. CAPABILITY PANEL Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012 The Department of Energy (DOE) Federal Technical Capability Order. DOE 0 426.1, requires that managers perform an annual workforce analysis of their organization and develop stal'ling plans that idcntil)' technical capabilities and positions they need lo ensure safe operation of defense nuclear facilities. This workforce analysis process continues lo cover technical capability needs to address defense nuclear facility nnd rclmed operational hazards. Individual

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

On the Beta Plane Approximation  

Science Conference Proceedings (OSTI)

The beta plane approximation as it is usually derived suffers from the difficulty that it is only valid if the quasi-geostrophic approximation is made. It is not valid for the underlying momentum and continuity equations. The problem in the ...

W. T. M. Verkley

1990-10-01T23:59:59.000Z

102

The Subinertial Mixed Layer Approximation  

Science Conference Proceedings (OSTI)

The density of the mixed layer is approximately uniform in the vertical but has dynamically important horizontal gradients. These nonuniformities in density result in a vertically sheared horizontal pressure gradient. Subinertial motions balance ...

W. R. Young

1994-08-01T23:59:59.000Z

103

The Quasi-Hydrostatic Approximation  

Science Conference Proceedings (OSTI)

Second-order expansion of the aspect ratio gives rise to simple equations with a quasi-hydrostatic approximation that perform far better than the classical hydrostatic system in the simulation of moist convection in a mesoscale model. It also ...

Isidoro Orlanski

1981-03-01T23:59:59.000Z

104

Heat pipe transient response approximation.  

SciTech Connect

A simple and concise routine that approximates the response of an alkali metal heat pipe to changes in evaporator heat transfer rate is described. This analytically based routine is compared with data from a cylindrical heat pipe with a crescent-annular wick that undergoes gradual (quasi-steady) transitions through the viscous and condenser boundary heat transfer limits. The sonic heat transfer limit can also be incorporated into this routine for heat pipes with more closely coupled condensers. The advantages and obvious limitations of this approach are discussed. For reference, a source code listing for the approximation appears at the end of this paper.

Reid, R. S. (Robert Stowers)

2001-01-01T23:59:59.000Z

105

Hydrogen Beyond the Classic Approximation  

E-Print Network (OSTI)

The classical nucleus approximation is the most frequently used approach for the resolution of problems in condensed matter physics.However, there are systems in nature where it is necessary to introduce the nuclear degrees of freedom to obtain a correct description of the properties.Examples of this, are the systems with containing hydrogen.In this work, we have studied the resolution of the quantum nuclear problem for the particular case of the water molecule.The Hartree approximation has been used, i.e. we have considered that the nuclei are distinguishable particles.In addition, we have proposed a model to solve the tunneling process, which involves the resolution of the nuclear problem for configurations of the system away from its equilibrium position

Scivetti, I

2003-01-01T23:59:59.000Z

106

Equivalence of Local Potential Approximations  

E-Print Network (OSTI)

In recent papers it has been noted that the local potential approximation of the Legendre and Wilson-Polchinski flow equations give, within numerical error, identical results for a range of exponents and Wilson-Fisher fixed points in three dimensions, providing a certain ``optimised'' cutoff is used for the Legendre flow equation. Here we point out that this is a consequence of an exact map between the two equations, which is nothing other than the exact reduction of the functional map that exists between the two exact renormalization groups. We note also that the optimised cutoff does not allow a derivative expansion beyond second order.

Tim R. Morris

2005-03-21T23:59:59.000Z

107

Employment and Staffing  

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

The OCHO provides policy and guidance for the departmental recruitment programs such as Veterans, Disability, and Career Pathway programs as well as policy on the Departments efforts on hiring...

108

Saturated PseudoadiabatsA Noniterative Approximation  

Science Conference Proceedings (OSTI)

Two noniterative approximations are presented for saturated pseudoadiabats (also known as moist adiabats). One approximation determines which moist adiabat passes through a point of known pressure and temperature, such as through the lifting ...

Atoossa Bakhshaii; Roland Stull

2013-01-01T23:59:59.000Z

109

Rational Approximation for a Quasilinear Parabolic Equation  

E-Print Network (OSTI)

Approximation theorems, analogous to known results for linear elliptic equations, are obtained for solutions of the heat equation. Via the Cole-Hopf transformation, this gives rise to approximation theorems for a nonlinear parabolic equation, Burgers' equation.

P. M. Gauthier; N. Tarkhanov

2007-09-22T23:59:59.000Z

110

Enabling ?-approximate querying in sensor networks  

Science Conference Proceedings (OSTI)

Data approximation is a popular means to support energy-efficient query processing in sensor networks. Conventional data approximation methods require users to specify fixed error bounds a prior to address the trade-off between result accuracy ...

Liu Yu; Jianzhong Li; Hong Gao; Xiaolin Fang

2009-08-01T23:59:59.000Z

111

Approximations: Atomic Ref. Data Elect. Struct. Calculations  

Science Conference Proceedings (OSTI)

... where ? xc (?) is the exchange-correlation energy per particle for the uniform electron gas of density ?. This approximation ...

112

An approximation trichotomy for Boolean #CSP  

E-Print Network (OSTI)

We give a trichotomy theorem for the complexity of approximately counting the number of satisfying assignments of a Boolean CSP instance. Such problems are parameterised by a constraint language specifying the relations that may be used in constraints. If every relation in the constraint language is affine then the number of satisfying assignments can be exactly counted in polynomial time. Otherwise, if every relation in the constraint language is in the co-clone IM_2 from Post's lattice, then the problem of counting satisfying assignments is complete with respect to approximation-preserving reductions in the complexity class #RH\\Pi_1. This means that the problem of approximately counting satisfying assignments of such a CSP instance is equivalent in complexity to several other known counting problems, including the problem of approximately counting the number of independent sets in a bipartite graph. For every other fixed constraint language, the problem is complete for #P with respect to approximation-prese...

Dyer, Martin; Jerrum, Mark

2007-01-01T23:59:59.000Z

113

Improved Error Bounds for the Adiabatic Approximation  

E-Print Network (OSTI)

Since the discovery of adiabatic quantum computing, a need has arisen for rigorously proven bounds for the error in the adiabatic approximation. We present in this paper, a rigorous and elementary derivation of upper and lower bounds on the error incurred from using the adiabatic approximation for quantum systems. Our bounds are often asymptotically tight in the limit of slow evolution for fixed Hamiltonians, and are used to provide sufficient conditions for the application of the adiabatic approximation. We show that our sufficiency criteria exclude the Marzlin--Sanders counterexample from the class of Hamiltonians that obey the adiabatic approximation. Finally, we demonstrate the existence of classes of Hamiltonians that resemble the Marzlin--Sanders counterexample Hamiltonian, but also obey the adiabatic approximation.

Cheung, Donny; Wiebe, Nathan

2011-01-01T23:59:59.000Z

114

Determination of approximate nonlinear self-adjointenss and approximate conservation law  

E-Print Network (OSTI)

Approximate nonlinear self-adjointness is an effective method to construct approximate conservation law of perturbed partial differential equations (PDEs). In this paper, we study the relations between approximate nonlinear self-adjointness of perturbed PDEs and nonlinear self-adjointness of the corresponding unperturbed PDEs, and consequently provide a simple approach to discriminate approximate nonlinear self-adjointness of perturbed PDEs. Moreover, a succinct approximate conservation law formula by virtue of the known conservation law of the unperturbed PDEs is given in an explicit form. As an application, we classify a class of perturbed wave equations to be approximate nonlinear self-adjointness and construct the general approximate conservation laws formulae. The specific examples demonstrate that approximate nonlinear self-adjointness can generate new approximate conservation laws.

Zhi-Yong Zhang

2013-01-19T23:59:59.000Z

115

Polymer state approximations of Schroedinger wave functions  

E-Print Network (OSTI)

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.

Klaus Fredenhagen; Felix Reszewski

2006-06-21T23:59:59.000Z

116

Improved approximations for k-exchange systems  

Science Conference Proceedings (OSTI)

Submodular maximization and set systems play a major role in combinatorial optimization. It is long known that the greedy algorithm provides a 1/(k + 1)-approximation for maximizing a monotone submodular function over a k-system. For the ...

Moran Feldman; Joseph Naor; Roy Schwartz; Justin Ward

2011-09-01T23:59:59.000Z

117

Blind multiuser detection based on kernel approximation  

Science Conference Proceedings (OSTI)

A kernel based multiuser detection (MUD) scheme in code-division multiple-access (CDMA) system is proposed. In this scheme, the support vector (SV) under support vector (SVM) framework is obtained through a kernel sparsity approximation, which regulates ...

Tao Yang; Bo Hu

2006-05-01T23:59:59.000Z

118

Casimir forces beyond the proximity approximation  

E-Print Network (OSTI)

The proximity force approximation (PFA) relates the interaction between closely spaced, smoothly curved objects to the force between parallel plates. Precision experiments on Casimir forces necessitate, and spur research ...

Bimonte, G.

119

Convergence Rates of Approximation by Translates  

E-Print Network (OSTI)

In this paper we consider the problem of approximating a function belonging to some funtion space Φ by a linear comination of n translates of a given function G. Ussing a lemma by Jones (1990) and Barron (1991) we show ...

Girosi, Federico

1992-03-01T23:59:59.000Z

120

Linear source approximation in CASMO5  

Science Conference Proceedings (OSTI)

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)

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

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

N-Stream Approximations to Radiative Transfer  

Science Conference Proceedings (OSTI)

Schuster's two-stream approximation is first derived from Chandrasekhar's radiative transfer equation, and then generalized to an arbitrary number of streams. The resulting technique for solving the transfer equation that is similar to the ...

Charles Acquista; Frederick House; James Jafolla

1981-07-01T23:59:59.000Z

122

An approximation trichotomy for Boolean #CSP  

E-Print Network (OSTI)

We give a trichotomy theorem for the complexity of approximately counting the number of satisfying assignments of a Boolean CSP instance. Such problems are parameterised by a constraint language specifying the relations that may be used in constraints. If every relation in the constraint language is affine then the number of satisfying assignments can be exactly counted in polynomial time. Otherwise, if every relation in the constraint language is in the co-clone IM2 from Posts lattice, then the problem of counting satisfying assignments is complete with respect to approximation-preserving reductions in the complexity class #RH?1. This means that the problem of approximately counting satisfying assignments of such a CSP instance is equivalent in complexity to several other known counting problems, including the problem of approximately counting the number of independent sets in a bipartite graph. For every other fixed constraint language, the problem is complete for #P with respect to approximation-preserving reductions, meaning that there is no fully polynomial randomised approximation scheme for counting satisfying assignments unless NP=RP. 1

Martin Dyer; Leslie Ann Goldberg; Mark Jerrum

2007-01-01T23:59:59.000Z

123

On the Accuracy of the MINC approximation  

DOE Green Energy (OSTI)

The method of ''multiple interacting continua'' is based on the assumption that changes in thermodynamic conditions of rock matrix blocks are primarily controlled by the distance from the nearest fracture. The accuracy of this assumption was evaluated for regularly shaped (cubic and rectangular) rock blocks with uniform initial conditions, which are subjected to a step change in boundary conditions on the surface. Our results show that pressures (or temperatures) predicted from the MINC approximation may deviate from the exact solutions by as much as 10 to 15% at certain points within the blocks. However, when fluid (or heat) flow rates are integrated over the entire block surface, MINC-approximation and exact solution agree to better than 1%. This indicates that the MINC approximation can accurately represent transient inter-porosity flow in fractured porous media, provided that matrix blocks are indeed subjected to nearly uniform boundary conditions at all times.

Lai, C.H.; Pruess, K.; Bodvarsson, G.S.

1986-02-01T23:59:59.000Z

124

The Exact Renormalisation Group and Approximate Solutions  

E-Print Network (OSTI)

We investigate the structure of Polchinski's formulation of the flow equations for the continuum Wilson effective action. Reinterpretations in terms of I.R. cutoff greens functions are given. A promising non-perturbative approximation scheme is derived by carefully taking the sharp cutoff limit and expanding in `irrelevancy' of operators. We illustrate with two simple models of four dimensional $\\lambda \\varphi^4$ theory: the cactus approximation, and a model incorporating the first irrelevant correction to the renormalized coupling. The qualitative and quantitative behaviour give confidence in a fuller use of this method for obtaining accurate results.

Tim R. Morris

1993-08-12T23:59:59.000Z

125

Testing approximations beyond the proton-neutron quasiparticle random phase approximation  

Science Conference Proceedings (OSTI)

In this work we analyze the validity of recently proposed extensions of the Quasiparticle Random Phase Approximation (QRPA). Particularly, we focus our attention on the Fully Renormalized QRPA (FRQRPA). We found that the results of this approximation do not differ from the results of the QRPA. This finding is supported by a detailed comparison between both formalisms, their assumptions and approximations, in the context of realistic calculations.

Civitarese, O.; Mariano, A. [Department of Physics. University of La Plata, C. C. 67 1900 La Plata (Argentina); Hirsch, J. G. [Instituto de Ciencias Nucleares, UNAM, A. P. 70-543, 04510 Mexico City, D. F. (Mexico); Reboiro, M. [Department of Physics. University of La Plata, C. C. 67 1900 La Plata (Argentina); Faculty of Engineering, University of Lomas de Zamora, Km 2 (1836) Lavallol (Argentina)

2007-08-15T23:59:59.000Z

126

Symbolic Test Selection Based on Approximate Analysis  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

127

Approximations to the Distributed Activation Energy Model  

E-Print Network (OSTI)

Approximations to the Distributed Activation Energy Model for Pyrolysis C.P. Please, 1 M.J. Mc, then resubmitted after minor revisions in September 2002. Abstract The Distributed Activation Energy Model (DAEM effective method for estimating kinetic parameters and the distribution of activation energies. Comparison

McGuinness, Mark

128

Complete Orders, Categories and Lattices of Approximations  

Science Conference Proceedings (OSTI)

The present article deals with the problem whether and how the bilattice orderings of knowledge ⩽$_k$ and truth ⩽$_t$ might enrich the theory of rough sets. Passing to the chief idea of the paper, we develop a bilattice-theoretic generalisation ... Keywords: *-autonomous category, Chu construction, Nelson lattice, approximation, bilattice, complete partial order, rough set

Marcin Wolski

2006-09-01T23:59:59.000Z

129

UNIFORM SEMICLASSICAL APPROXIMATION IN QUANTUM STATISTICAL MECHANICS.  

SciTech Connect

We present a simple method to deal with caustics in the semiclassical approximation to the partition function of a one-dimensional quantum system. The procedure, which makes use of complex trajectories, is applied to the quartic double-well potential.

De Carvalho, C.A.A.; Cavalcanit, R.M.; Fraga, E.S.; Joras, S.E.

2000-10-23T23:59:59.000Z

130

Nonlinear piecewise polynomial approximation: Theory and Algorithms  

E-Print Network (OSTI)

algorithms for compression and quick rendering of Digital Terrain Elevation Data (DTED) maps and implement by these and further theoretical results, we develop e?cient practical algorithms for compression and quick rendering linear approximation 23 2.3. Slim B-spaces 32 2.4. Skinny B-spaces 42 2.5. Fat B-spaces: The link

Karaivanov, Borislav

131

Nonlinear piecewise polynomial approximation: Theory and Algorithms  

E-Print Network (OSTI)

algorithms for compression and quick rendering of Digital Terrain Elevation Data (DTED) maps and implement results, we develop efficient practical algorithms for compression and quick rendering of Digital Terrain approximation 23 2.3. Slim B-spaces 32 2.4. Skinny B-spaces 42 2.5. Fat B-spaces: The link to Besov spaces 46 2

Karaivanov, Borislav

132

Real-time creased approximate subdivision surfaces  

Science Conference Proceedings (OSTI)

We present an extension of recently developed Loop and Schaefer's approximation of Catmull-Clark surfaces (ACC) for surfaces with creases and corners which are essential for most applications. We discuss the integration of ACC into Valve's Source game ... Keywords: GPU tessellation, geometric modeling, hardware rendering, subdivision surfaces, video games

Denis Kovacs; Jason Mitchell; Shanon Drone; Denis Zorin

2009-02-01T23:59:59.000Z

133

Approximate gauge symmetry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector bosons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in a more intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko [Lawrence Berkeley National Laboratory and Department of Physics, University of California, Berkeley, California 94720 (United States)

2010-08-15T23:59:59.000Z

134

Approximate gauge symemtry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector mesons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in more an intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko

2010-06-01T23:59:59.000Z

135

Approximating stochastic volatility by recombinant trees  

E-Print Network (OSTI)

A general method to construct recombinant tree approximations for stochastic volatility models is developed and applied to the Heston model for stock price dynamics. In this application, the resulting approximation is a four tuple Markov process. The ?first two components are related to the stock and volatility processes and take values in a two dimensional Binomial tree. The other two components of the Markov process are the increments of random walks with simple values in {-1; +1}. The resulting effi?cient option pricing equations are numerically implemented for general American and European options including the standard put and calls, barrier, lookback and Asian type pay-o?ffs. The weak and extended weak convergence are also proved.

Akyildirim, Erdinc; Soner, H Mete

2012-01-01T23:59:59.000Z

136

Dictionary Approximation For Matching Pursuit Video Coding  

E-Print Network (OSTI)

Previously, we demonstrated an efficient video codec based on overcomplete signal decomposition using matching pursuits. Dictionary design is an important issue for this system, and others have shown alternate dictionaries which lead to either coding efficiency improvements or reduced encoder complexity. In this work, we introduce for the first time a design methodology which incorporates both coding efficiency and complexity in a systematic way. The key to our new method is an algorithm which takes an arbitrary 2-D dictionary and generates approximations of the dictionary which have fast 2-stage implementations. By varying the quality of the approximation, we can explore a systematic tradeoff between the coding efficiency and complexity of the matching pursuit video encoder. As a practical result, we show cases where complexity is reduced by a factor of 500 to 1000 in exchange for small coding efficiency losses of around 0.1 dB PSNR. 1. INTRODUCTION Most video codecs in use today ar...

Ralph Neff; Avideh Zakhor

2000-01-01T23:59:59.000Z

137

Shear viscosity in the postquasistatic approximation  

Science Conference Proceedings (OSTI)

We apply the postquasistatic approximation, an iterative method for the evolution of self-gravitating spheres of matter, to study the evolution of anisotropic nonadiabatic 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 noncomoving coordinates, with the Vaidya exterior solution. Two simple models are presented, based on the Schwarzschild and Tolman VI solutions, in the nonadiabatic and adiabatic limit. In both cases, the eventual collapse or expansion of the distribution is mainly controlled by the anisotropy induced by the viscosity.

Peralta, C.; Rosales, L.; Rodriguez-Mueller, B.; Barreto, W. [Deutscher Wetterdienst, Frankfurter Str. 135, 63067 Offenbach (Germany); Laboratorio de Fisica Computacional, Universidad Experimental Politecnica 'Antonio Jose de Sucre', Puerto Ordaz (Venezuela, Bolivarian Republic of); Computational Science Research Center, College of Sciences, San Diego State University, San Diego, California (United States); Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of)

2010-05-15T23:59:59.000Z

138

Analytic approximate radiation effects due to Bremsstrahlung  

SciTech Connect

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.

Ben-Zvi I.

2012-02-01T23:59:59.000Z

139

1 Staffing 2013 Staffing and Personnel Selection, 2013  

E-Print Network (OSTI)

). Matching people and jobs. McKinsey Quarterly, June, p. 70-79. (9 pg). Optional: Crook, T. R., Todd, S. Y for emerging markets. McKinsey Quarterly, May, p. 1-4. Sunley, J. (2011) The right way to recruit. Caterer

140

Semiclassical approximation to supersymmetric quantum gravity  

SciTech Connect

We develop a semiclassical approximation scheme for the constraint equations of supersymmetric canonical quantum gravity. This is achieved by a Born-Oppenheimer type of expansion, in analogy to the case of the usual Wheeler-DeWitt equation. The formalism is only consistent if the states at each order depend on the gravitino field. We recover at consecutive orders the Hamilton-Jacobi equation, the functional Schroedinger equation, and quantum gravitational correction terms to this Schroedinger equation. In particular, the following consequences are found: (i) the Hamilton-Jacobi equation and therefore the background spacetime must involve the gravitino, (ii) a (many-fingered) local time parameter has to be present on super Riem {sigma} (the space of all possible tetrad and gravitino fields) (iii) quantum supersymmetric gravitational corrections affect the evolution of the very early Universe. The physical meaning of these equations and results, in particular, the similarities to and differences from the pure bosonic case, are discussed.

Kiefer, Claus; Lueck, Tobias; Moniz, Paulo [Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Cologne (Germany); Astronomy Unit, School of Mathematical Sciences, Queen Mary College, University of London, Mile End Road, London E1 4NS (United Kingdom)

2005-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Generic sequential sampling for metamodel approximations  

SciTech Connect

Metamodels approximate complex multivariate data sets from simulations and experiments. These data sets often are not based on an explicitly defined function. The resulting metamodel represents a complex system's behavior for subsequent analysis or optimization. Often an exhaustive data search to obtain the data for the metalnodel is impossible, so an intelligent sampling strategy is necessary. While inultiple approaches have been advocated, the majority of these approaches were developed in support of a particular class of metamodel, known as a Kriging. A more generic, cotninonsense approach to this problem allows sequential sampling techniques to be applied to other types of metamodeis. This research compares recent search techniques for Kriging inetamodels with a generic, inulti-criteria approach combined with a new type of B-spline metamodel. This B-spline metamodel is competitive with prior results obtained with a Kriging metamodel. Furthermore, the results of this research highlight several important features necessary for these techniques to be extended to more complex domains.

Turner, C. J. (Cameron J.); Campbell, M. I. (Matthew I.)

2003-01-01T23:59:59.000Z

142

Heat flow in the postquasistatic approximation  

Science Conference Proceedings (OSTI)

We apply the postquasistatic approximation to study the evolution of spherically symmetric fluid distributions undergoing dissipation in the form of radial heat flow. For a model that corresponds to an incompressible fluid departing from the static equilibrium, it is not possible to go far from the initial state after the emission of a small amount of energy. Initially collapsing distributions of matter are not permitted. Emission of energy can be considered as a mechanism to avoid the collapse. If the distribution collapses initially and emits one hundredth of the initial mass only the outermost layers evolve. For a model that corresponds to a highly compressed Fermi gas, only the outermost shell can evolve with a shorter hydrodynamic time scale.

Rodriguez-Mueller, B. [Computational Science Research Center, College of Sciences, San Diego State University, San Diego, California (United States); Peralta, C. [Deutscher Wetterdienst, Frankfurter Strasse 135, 63067 Offenbach (Germany); School of Physics, University of Melbourne, Parkville, VIC 3010 (Australia); Barreto, W. [Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of); Rosales, L. [Laboratorio de Fisica Computacional, Universidad Experimental Politecnica, 'Antonio Jose de Sucre', Puerto Ordaz (Venezuela, Bolivarian Republic of)

2010-08-15T23:59:59.000Z

143

Comonotonic approximations for optimal portfolio selection problems  

E-Print Network (OSTI)

We investigate multiperiod portfolio selection problems in a Black & Scholes type market where a basket of 1 riskfree and m risky securities are traded continuously. We look for the optimal allocation of wealth within the class of constant mix portfolios. First, we consider the portfolio selection problem of a decision maker who invests money at predetermined points in time in order to obtain a target capital at the end of the time period under consideration. A second problem concerns a decision maker who invests some amount of money (the initial wealth or provision) in order to be able to fullfil a series of future consumptions or payment obligations. Several optimality criteria and their interpretation within Yaaris dual theory of choice under risk are presented. For both selection problems, we propose accurate approximations based on the concept of comonotonicity, as studied in Dhaene, Denuit, Goovaerts, Kaas & Vyncke (2002 a,b). Our analytical approach avoids simulation, and hence reduces the computing effort drastically. 1

J. Dhaene; S. Vanduffel; M. J. Goovaerts; R. Kaas; D. Vyncke

2005-01-01T23:59:59.000Z

144

A Class of Semi-Lagrangian Approximations for Fluids  

Science Conference Proceedings (OSTI)

This paper discusses a class of finite-difference approximations to the evolution equations of fluid dynamics. These approximations derive from elementary properties of differential forms. Values of a fluid variable ? at any two points of a space-...

Piotr K. Smolarkiewicz; Janusz A. Pudykiewicz

1992-11-01T23:59:59.000Z

145

Weak Pressure Gradient Approximation and Its Analytical Solutions  

Science Conference Proceedings (OSTI)

A weak pressure gradient (WPG) approximation is introduced for parameterizing supradomain-scale (SDS) dynamics, and this method is compared to the relaxed form of the weak temperature gradient (WTG) approximation in the context of 3D, linearized, ...

David M. Romps

2012-09-01T23:59:59.000Z

146

Four-Stream Isosector Approximation for Solar Radiative Transfer  

Science Conference Proceedings (OSTI)

For radiative transfer in a thin atmosphere, an analytical four-stream isosector approximation for solar radiative transfer is presented. This approximation method is based on the assumption of four spherical sectors of isotropic intensities. ...

J. Li; J. S. Dobbie

1998-02-01T23:59:59.000Z

147

Dynamic Enthalpy, Conservative Temperature, and the Seawater Boussinesq Approximation  

Science Conference Proceedings (OSTI)

A new seawater Boussinesq system is introduced, and it is shown that this approximation to the equations of motion of a compressible binary solution has an energy conservation law that is a consistent approximation to the Bernoulli equation of ...

William R. Young

2010-02-01T23:59:59.000Z

148

Table A3. Approximate Heat Content of Petroleum Consumption and ...  

U.S. Energy Information Administration (EIA)

Table A3. Approximate Heat Content of Petroleum Consumption and Biofuels Production, 1949-2011 (Million Btu per Barrel)

149

Weighted trapezoidal approximation-preserving cores of a fuzzy number  

Science Conference Proceedings (OSTI)

Recently, various researchers have proved that approximations of fuzzy numbers may fail to be fuzzy numbers. In this contribution, we suggest a new weighted trapezoidal approximation of an arbitrary fuzzy number, which preserves its cores. We prove that ... Keywords: Core of fuzzy number, Fuzzy numbers, Trapezoidal fuzzy numbers, Weighted approximation

S. Abbasbandy; T. Hajjari

2010-05-01T23:59:59.000Z

150

Curvilinear parabolic approximation for surface wave transformation with wavecurrent interaction  

E-Print Network (OSTI)

Curvilinear parabolic approximation for surface wave transformation with wave­current interaction not be an appropriate method for the purpose of simplifying the curvilinear parabolic approximation of the vector form of the wave­current equation given by Kirby [Higher-order approximations in the parabolic equation method

Kirby, James T.

151

An Approximation Algorithm for Computing a Parsimonious ... - CECM  

E-Print Network (OSTI)

Due to the large number of species in the real data set ? 6808 fungal gene trees from 23 species ? we applied only our approximation algorithm. We observed.

152

Hardness and Approximation Results for LpBall Constrained ...  

E-Print Network (OSTI)

Oct 31, 2012... a fundamental research issue is to determine their approximability. ...... R. Saigal, and L. Vandenberghe, editors, Handbook of Semidefinite...

153

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

E-Print Network (OSTI)

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...

154

Polynomial time algorithms to approximate mixed volumes within a ...  

E-Print Network (OSTI)

Apr 11, 2007 ... ellipsoid method and a randomized poly-time time algorithm for the approximation of the volume of a convex set. ? gurvits@lanl.gov.

155

Table A3. Approximate Heat Content of Petroleum Consumption and ...  

U.S. Energy Information Administration (EIA)

U.S. Energy Information Administration / Annual Energy Review 2011 323 Table A3. Approximate Heat Content of Petroleum Consumption and Biofuels Production, Selected ...

156

Table A3. Approximate Heat Content of Petroleum Consumption and ...  

U.S. Energy Information Administration (EIA)

Table A3. Approximate Heat Content of Petroleum Consumption and Biofuels Production, 1949-2011 (Million Btu per Barrel) Year: Total Petroleum 1 ...

157

Approximating the traffic grooming problem in tree and star networks  

Science Conference Proceedings (OSTI)

We consider the problem of grooming paths in all-optical networks with tree topology so as to minimize the switching cost, measured by the total number of used ADMs. We first present efficient approximation algorithms with approximation factor of 2 ln ... Keywords: add-drop multiplexer (ADM), optical networks, traffic grooming, tree networks, wavelength division multiplexing (WDM)

Michele Flammini; Gianpiero Monaco; Luca Moscardelli; Mordechai Shalom; Shmuel Zaks

2006-06-01T23:59:59.000Z

158

On the progressive iteration approximation property and alternative iterations  

Science Conference Proceedings (OSTI)

This note revisits the progressive iteration approximation property and some recent modifications from the point of view of iterative methods for solving linear systems. In particular we show the connection with the classical Richardson iteration and ... Keywords: GMRES, Interpolation, Iterative methods, Progressive iteration approximation

J. M. Carnicer; J. Delgado; J. M. Pea

2011-12-01T23:59:59.000Z

159

A constrained binary knapsack approximation for shortest path network interdiction  

Science Conference Proceedings (OSTI)

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

Justin Yates; Kavitha Lakshmanan

2011-11-01T23:59:59.000Z

160

On-line Approximate String Matching in Natural Language  

Science Conference Proceedings (OSTI)

We consider approximate pattern matching in natural language text. We use the words of the text as the alphabet, instead of the characters as in traditional string matching approaches. Hence our pattern consists of a sequence of words. From the algorithmic ... Keywords: Approximate string matching, filtering, natural language processing, phrase matching, word alphabet

Kimmo Fredriksson

2006-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Quantile approximations in auto-regressive portfolio models  

Science Conference Proceedings (OSTI)

This paper develops an analytical approximation for the distribution function of a terminal value of a periodic series of buy-and-hold investments placed over a fixed time horizon for the case when log-returns of assets follow a p-th order vector auto-regressive ... Keywords: Multi-period portfolio return, Taylor conditioned approximation, Vector auto-regressive returns

Ale Ah?an; Igor Masten; Sao Polanec; Mihael Perman

2011-02-01T23:59:59.000Z

162

Error estimates for the numerical approximation of Neumann control problems  

Science Conference Proceedings (OSTI)

We continue the discussion of error estimates for the numerical analysis of Neumann boundary control problems we started in Casas et al. (Comput. Optim. Appl. 31:193-219, 2005). In that paper piecewise constant functions were used to approximate the ... Keywords: boundary control, error estimates, numerical approximation, semilinear elliptic equation

Eduardo Casas; Mariano Mateos

2008-04-01T23:59:59.000Z

163

Reasoning with rough description logics: An approximate concepts approach  

Science Conference Proceedings (OSTI)

The current research progress and the existing problems of uncertain or imprecise knowledge representation and reasoning in description logics are analyzed in this paper. Approximate concepts are introduced to description logics based on rough set theory, ... Keywords: Approximate concepts, Concepts, Description logics, Rough description logics, Rough set theory

Yuncheng Jiang; Ju Wang; Suqin Tang; Bao Xiao

2009-02-01T23:59:59.000Z

164

Neural Acceleration for General-Purpose Approximate Programs  

Science Conference Proceedings (OSTI)

This paper describes a learning-based approach to the acceleration of approximate programs. We describe the \\emph{Parrot transformation}, a program transformation that selects and trains a neural network to mimic a region of imperative code. After the ... Keywords: Approximate Computing, Neural Networks, Accelerator, Neural Processing Unit, NPU

Hadi Esmaeilzadeh; Adrian Sampson; Luis Ceze; Doug Burger

2012-12-01T23:59:59.000Z

165

Approximating Selective Sweeps by Richard Durrett and Jason Schweinsberg  

E-Print Network (OSTI)

Approximating Selective Sweeps by Richard Durrett and Jason Schweinsberg Dept. of Math, Cornell U of selective sweeps on genealogies. However, most subsequent work has simplified their approach by assuming that the impact of a selective sweep can be accurately approximated by a random partition created by a stick

Durrett, Richard

166

An approximation algorithm for convex multi-objective programming problems  

Science Conference Proceedings (OSTI)

In multi-objective convex optimization it is necessary to compute an infinite set of nondominated points. We propose a method for approximating the nondominated set of a multi-objective nonlinear programming problem, where the objective functions and ... Keywords: ?-nondominated point, Approximation algorithm, Convex optimization, Multi-objective optimization

Matthias Ehrgott; Lizhen Shao; Anita Schbel

2011-07-01T23:59:59.000Z

167

Thermodynamic Consistency of the Anelastic Approximation for a Moist Atmosphere  

Science Conference Proceedings (OSTI)

The primary goal of this paper is to validate the use of the anelastic approximation for fluids with a complex equation of state such as moist air or seawater. The anelastic approximation is based on a leading-order expansion of the equations of ...

Olivier Pauluis

2008-08-01T23:59:59.000Z

168

Approximate Coulomb distortion effects in (e,e'p) reactions  

E-Print Network (OSTI)

In this paper we apply a well-tested approximation of electron Coulomb distortion effects to the exclusive reaction (e,e'p) in the quasielastic region. We compare the approximate treatment of Coulomb distortion effects to the exact distorted wave Born approximation evaluated by means of partial wave analysis to gauge the quality of our approximate treatment. We show that the approximate M\\"oller potential has a plane-wave-like structure and hence permits the separation of the cross section into five terms which depend on bilinear products of transforms of the transition four current elements. These transforms reduce to Fourier transforms when Coulomb distortion is not present, but become modified with the inclusion of Coulomb distortion. We investigate the application of the approximate formalism to a model of 208Pb(e,e'p) using Dirac-Hartree single particle wave functions for the ground state and relativistic optical model wave functions for the continuum proton. We show that it is still possible to extract, albeit with some approximation, the various structure functions from the experimentally measured data even for heavy nuclei.

K. S. Kim; L. E. Wright

2005-03-30T23:59:59.000Z

169

WKBJ Approximation of the Stability of a Frontal Mean State  

Science Conference Proceedings (OSTI)

The baroclinic instability of a frontal mean state is investigated using the WKBJ approximation. The results are compared with numerical calculations performed on the same mean state. Excellent agreement (within 5%) is found for jets whose half-...

Petros Ioannou; Richard S. Lindzen

1990-12-01T23:59:59.000Z

170

An empirical comparison of some approximate methods for graph coloring  

Science Conference Proceedings (OSTI)

The Graph Coloring Problem (GCP) is a classical NP-complete problem for which several approximate solution algorithms have been proposed: Brelaz algorithm, simulated annealing (SA), ant colony optimization (ACO). This paper reports empirical results ... Keywords: graph coloring, gravitational swarm

Israel Rebollo-Ruiz; Manuel Graa

2012-03-01T23:59:59.000Z

171

Linear Baroclinic instability with the Geostrophic Momentum Approximation  

Science Conference Proceedings (OSTI)

The linear Eady model of baroclinic instability with the geostrophic momentum (GM) approximation is solved analytically in physical space and shown to be identical to linear three-dimensional semigeostrophic theory. Both the growth rates and the ...

Peter R. Bannon

1989-02-01T23:59:59.000Z

172

Potential Vorticity Conservation, Hydrostatic Adjustment, and the Anelastic Approximation  

Science Conference Proceedings (OSTI)

An examination of the anelastic equations of Lipps and Hemler shows that the approximation requires the temperature and potential temperature scale heights of the base state are large compared to the pressure and density scale heights. As a ...

Peter R. Bannon

1995-06-01T23:59:59.000Z

173

Approximate dynamic programming with applications in multi-agent systems  

E-Print Network (OSTI)

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 ...

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

2007-01-01T23:59:59.000Z

174

Testing and Comparing the Modified Anomalous Diffraction Approximation  

Science Conference Proceedings (OSTI)

The modified anomalous diffraction approximation (MADA) is used to predict absorption and extinction in water and ice clouds, but it does not predict the scattering phase function or asymmetry parameter g. In conjunction with g parameterizations, ...

David L. Mitchell; Anthony J. Baran; W. P. Arnott; C. Schmitt

2006-11-01T23:59:59.000Z

175

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

E-Print Network (OSTI)

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, ...

Crisman, Jonathan

2013-01-01T23:59:59.000Z

176

The Approximating Hamiltonian Method for the Imperfect Boson Gas  

E-Print Network (OSTI)

The pressure for the Imperfect (Mean Field) Boson gas can be derived in several ways. The aim of the present note is to provide a new method based on the Approximating Hamiltonian argument which is extremely simple and very general.

Joseph V. Pule; Valentin A. Zagrebnov

2004-05-14T23:59:59.000Z

177

Approximate expressions for polar gap electric field of pulsars  

E-Print Network (OSTI)

We derive easy-to-handle approximations for the polar gap electric field due to inertial frame dragging as derived by Harding & Muslimov 1998. A simple formula valid for polar gap height comparable to the polar cap radius is presented.

J. Dyks; B. Rudak

2000-06-19T23:59:59.000Z

178

Approximate query answering in unstructured peer-to-peer databases.  

E-Print Network (OSTI)

??Peer-to-peer networks are considered the new generation of distributed databases, termed peer-to-peer databases. With very large size, open architecture, and extreme dynamism and autonomy, approximate (more)

Banaei-Kashani, Farnoush

2007-01-01T23:59:59.000Z

179

On the Median Volume Diameter Approximation for Droplet Collision Efficiency  

Science Conference Proceedings (OSTI)

In this note, we examine a shortcut for calculating the overall collision efficiency of a droplet spectrum, known as the median volume diameter (mvd) approximation. By calculating the overall collision efficiency of a circular cylinder for a ...

Karen J. Finstad; Edward P. Lozowski; Lasse Makkonen

1988-12-01T23:59:59.000Z

180

A Free-Algebraic Solution for the Planar Approximation  

E-Print Network (OSTI)

An explicit solution for the generating functional of n-point functions in the planar approximation is given in terms of two sets of free-algebraic annihilation and creation operators.

O. Haan

2004-08-11T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Relativistic plasma dispersion functions: Series, integrals, and approximations  

SciTech Connect

A number of results are presented involving the plasma dispersion functions appropriate to waves in weakly relativistic, magnetized, thermal plasmas. These results include generating functions, series, integral forms and interrelations, and several useful approximations.

Robinson, P.A.

1987-05-01T23:59:59.000Z

182

Statistical theory of Langmuir turbulence. [Direct interaction approximation  

SciTech Connect

A statistical theory of Langmuir turbulence is developed by applying a generalization of the direction interaction approximation (DIA) of Kraichnan to the Zakharov equations describing Langmuir turbulence. 7 references.

DuBois, D.F.; Rose, H.A.; Goldman, M.V.

1979-01-01T23:59:59.000Z

183

A Practical Approximation to Optimal Four-Dimensional Objective Analysis  

Science Conference Proceedings (OSTI)

An iterative four-dimensional objective analysis scheme is described. The method is derived by approximating a variational algorithm which should give an optimal four-dimensional analysis The complete set of operationally available observations, ...

Andrew C. Lorenc

1988-03-01T23:59:59.000Z

184

A discrete BGK approximation for strongly degenerate parabolic problems  

E-Print Network (OSTI)

A discrete BGK approximation for strongly degenerate parabolic problems with boundary conditions F strongly degenerate hyperbolic--parabolic equations with initial boundary condition. We prove a priori -- strongly degenerate parabolic equations -- singular perturbation problems -- BGK models 1 Introduction

185

On Safe Tractable Approximations of Chance Constrained Linear ...  

E-Print Network (OSTI)

Faculty of Industrial Engineering and Management, Technion Israel Institute of Technology, ... its scenario approximation is the random optimization program min x. { f0(x) : fi(x ..... We generate a training sample of N independent realizations.

186

Approximation algorithms for stochastic scheduling on unrelated machines  

E-Print Network (OSTI)

Motivated by problems in distributed computing, this thesis presents the first nontrivial polynomial time approximation algorithms for an important class of machine scheduling problems. We study the family of preemptive ...

Scott, Jacob (Jacob Healy)

2008-01-01T23:59:59.000Z

187

Numerical Tests of the Weak Pressure Gradient Approximation  

Science Conference Proceedings (OSTI)

Cloud-resolving simulations of convection over a surface temperature hot spot are used to evaluate the weak pressure gradient (WPG) and weak temperature gradient (WTG) approximations. The premise of the relaxed form of WTGthat vertical velocity ...

David M. Romps

2012-09-01T23:59:59.000Z

188

Approximating the traffic grooming problem in tree and star networks  

Science Conference Proceedings (OSTI)

We consider the problem of grooming paths in all-optical networks with tree topology so as to minimize the switching cost, measured by the total number of used ADMs. We first present efficient approximation algorithms with approximation factor of 2ln(@d@?g)+o(ln(@d@?g)) ... Keywords: Add-drop multiplexer (ADM), Optical networks, Traffic grooming, Tree networks, Wavelength division multiplexing (WDM)

Michele Flammini; Gianpiero Monaco; Luca Moscardelli; Mordechai Shalom; Shmuel Zaks

2008-07-01T23:59:59.000Z

189

Indexing methods for approximate dictionary searching: Comparative analysis  

Science Conference Proceedings (OSTI)

The primary goal of this article is to survey state-of-the-art indexing methods for approximate dictionary searching. To improve understanding of the field, we introduce a taxonomy that classifies all methods into direct methods and sequence-based filtering ... Keywords: k-errata tree, q-gram, q-sample, Damerau-Levenshtein distance, Levenshtein distance, NR-grep, agrep, approximate searching, frequency distance, frequency vector trie, metric trees, neighborhood generation, trie

Leonid Boytsov

2011-05-01T23:59:59.000Z

190

The Monte Carlo Independent Column Approximation Model Intercomparison  

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

The Monte Carlo Independent Column Approximation Model Intercomparison The Monte Carlo Independent Column Approximation Model Intercomparison Project (McMIP) Barker, Howard Meteorological Service of Canada Cole, Jason Meteorological Service of Canada Raisanen, Petri Finnish Meteorological Institute Pincus, Robert NOAA-CIRES Climate Diagnostics Center Morcrette, Jean-Jacques European Centre for Medium-Range Weather Forecasts Li, Jiangnan Canadian Center for Climate Modelling Stephens, Graeme Colorado State University Vaillancourt, Paul Environment Canada Oreopoulos, Lazaros JCET/UMBC and NASA/GSFC Siebesma, Pier KNMI Los, Alexander KNMI Clothiaux, Eugene The Pennsylvania State University Randall, David Colorado State University Iacono, Michael Atmospheric & Environmental Research, Inc. Category: Radiation The Monte Carlo Independent Column Approximation (McICA) method for

191

The Complexity of Approximating Bounded-Degree Boolean #CSP  

E-Print Network (OSTI)

The degree of a CSP instance is the maximum number of times that a variable may appear in the scope of constraints. We consider the approximate counting problem for Boolean CSPs with bounded-degree instances for constraint languages containing the two unary constant relations {0} and {1}. When the maximum degree is at least 25 we obtain a complete classification of the complexity of this problem. It is exactly solvable in polynomial-time if every relation in the constraint language is affine. It is equivalent to the problem of approximately counting independent sets in bipartite graphs if every relation can be expressed as conjunctions of {0}, {1} and binary implication. Otherwise, there is no FPRAS unless NP=RP. For lower degree bounds, additional cases arise in which the complexity is related to the complexity of approximately counting independent sets in hypergraphs.

Dyer, Martin; Jalsenius, Markus; Richerby, David

2009-01-01T23:59:59.000Z

192

Discrete Variational Calculus for B-spline Approximated Curves  

E-Print Network (OSTI)

We study variational problems for curves approximated by B-spline curves. We show that, one can obtain discrete Euler-Lagrange equations, for the data describing the approximated curves. Our main application is to the curve completion problem in 2D and 3D. In this case, the aim is to find various aesthetically pleasing solutions as opposed to a solution of a physical problem. The Lagrangians of interest are invariant under the special Euclidean group action for which B-spline approximated curves are well suited. Smooth Lagrangians with special Euclidean symmetries involve curvature, torsion, and arc length. Expressions in these, in the original coordinates, are highly complex. We show that, by contrast, relatively simple discrete Lagrangians offer excellent results for the curve completion problem. The methods we develop for the discrete curve completion problem are general and can be used to solve other discrete variational problems for B-spline curves.

Zhao, Jun

2010-01-01T23:59:59.000Z

193

Efficient algorithm for approximating one-dimensional ground states  

Science Conference Proceedings (OSTI)

The density-matrix renormalization-group method is very effective at finding ground states of one-dimensional (1D) quantum systems in practice, but it is a heuristic method, and there is no known proof for when it works. In this article we describe an efficient classical algorithm which provably finds a good approximation of the ground state of 1D systems under well-defined conditions. More precisely, our algorithm finds a matrix product state of bond dimension D whose energy approximates the minimal energy such states can achieve. The running time is exponential in D, and so the algorithm can be considered tractable even for D, which is logarithmic in the size of the chain. The result also implies trivially that the ground state of any local commuting Hamiltonian in 1D can be approximated efficiently; we improve this to an exact algorithm.

Aharonov, Dorit; Arad, Itai; Irani, Sandy [School of Computer Science and Engineering, Hebrew University, Jerusalem (Israel); School of Computer Science, Tel-Aviv University, Tel-Aviv (Israel); Computer Science Department, University of California, Irvine, California (United States)

2010-07-15T23:59:59.000Z

194

approximately 200 megawatts (MWs) of power from TCEP, making  

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

approximately 200 megawatts (MWs) of power from TCEP, making approximately 200 megawatts (MWs) of power from TCEP, making it the first U.S. purchase by a utility of low-carbon power from a commercial-scale, coal-based power plant with carbon capture. The 400-MW TCEP plant is a first-of-its-kind integrated gasification combined cycle (IGCC) poly-generation facility capable of capturing 90 percent of the carbon dioxide (CO 2 ) it produces. The $2.4-billion plant was a third round selection under DOE's Clean Coal Power Initiative

195

Efficient classical simulation of the approximate quantum Fourier transform  

E-Print Network (OSTI)

We present a method for classically simulating quantum circuits based on the tensor contraction model of Markov and Shi (quant-ph/0511069). Using this method we are able to classically simulate the approximate quantum Fourier transform in polynomial time. Moreover, our approach allows us to formulate a condition for the composability of simulable quantum circuits. We use this condition to show that any circuit composed of a constant number of approximate quantum Fourier transform circuits and log-depth circuits with limited interaction range can also be efficiently simulated.

Nadav Yoran; Anthony J. Short

2006-11-23T23:59:59.000Z

196

Are there approximate relations among transverse momentum dependent distribution functions?  

SciTech Connect

Certain {\\sl exact} relations among transverse momentum dependent parton distribution functions due to QCD equations of motion turn into {\\sl approximate} ones upon the neglect of pure twist-3 terms. On the basis of available data from HERMES we test the practical usefulness of one such ``Wandzura-Wilczek-type approximation'', namely of that connecting $h_{1L}^{\\perp(1)a}(x)$ to $h_L^a(x)$, and discuss how it can be further tested by future CLAS and COMPASS data.

Harutyun AVAKIAN; Anatoli Efremov; Klaus Goeke; Andreas Metz; Peter Schweitzer; Tobias Teckentrup

2007-10-11T23:59:59.000Z

197

On k-jet field approximations of geodesic deviation equations  

E-Print Network (OSTI)

Let M be a smooth manifold and S a spray defined on the convex cone C of the tangent bundle TM. It is proved that the only non-trivial k-jet approximation of the exact geodesic deviation equation of S, linear on the deviation functions and invariant under arbitrary local coordinate transformations corresponds to the Jacobi equation. However, if linearity in the deviation functions is not required, there are differential equations whose solutions admit k-jet approximations and are invariant under arbitrary coordinate transformations. As an example of higher order geodesic deviation equations we study the first and second order jet geodesic deviation equations for a Finsler spray.

Torrom, Ricardo Gallego

2013-01-01T23:59:59.000Z

198

QueryLines: approximate query for visual browsing  

E-Print Network (OSTI)

We introduce approximate query techniques for searching and analyzing two-dimensional data sets such as line or scatter plots. Our techniques allow users to explore a dataset by defining QueryLines: soft constraints and preferences for selecting and sorting a subset of the data. By using both preferences and soft constraints for query composition, we allow greater flexibility and expressiveness than previous visual query systems. When the user over-constrains a query, for example, a system using approximate techniques can display near missesto enable users to quickly and continuously refine queries.

Kathy Ryall; Neal Lesh; Hiroaki Miyashita; Shigeru Makino; Tom Lanning; Tom Lanning; Darren Leigh; Darren Leigh

2005-01-01T23:59:59.000Z

199

Properties of derivative expansion approximations to the renormalization group  

E-Print Network (OSTI)

Approximation only by derivative (or more generally momentum) expansions, combined with reparametrization invariance, turns the continuous renormalization group for quantum field theory into a set of partial differential equations which at fixed points become non-linear eigenvalue equations for the anomalous scaling dimension $\\eta$. We review how these equations provide a powerful and robust means of discovering and approximating non-perturbative continuum limits. Gauge fields are briefly discussed. Particular emphasis is placed on the r\\^ole of reparametrization invariance, and the convergence of the derivative expansion is addressed.

Tim R. Morris

1996-10-02T23:59:59.000Z

200

Best Approximation in the Mean by Analytic and Harmonic Functions  

E-Print Network (OSTI)

* *ng the annihilator Ann (Hp) in Lq(T, d`)as Hq0= {f 2 Hq : f(0) = 0}, q = __p__pt-u1rns* * out is organized as follows. In Section 2we prove the exi* *stence of best approximations and characterize them

McCarthy, John E.

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Asymptotic Approximations to the Distributed Activation Energy Model  

E-Print Network (OSTI)

Asymptotic Approximations to the Distributed Activation Energy Model M.J.McGuinness1 , E. Donskoi2 by a continuum distribution in activation energy of individual re- actions. An individual reaction is characterised by a pre-exponential coefficient and an activation energy. The distribution, usually Gaussian

McGuinness, Mark

202

Choosing an Approximation to the Equation of Radiative Transfer  

Science Conference Proceedings (OSTI)

We examine the accuracy of the PL, approximation to the equation of radiative transfer in the presence of scattering/absorbing clouds of various optical thicknesses. We find that very accurate net fluxes can be obtained with the P1, (two-stream) ...

James A. Fillmore; Alan H. Karp

1980-08-01T23:59:59.000Z

203

Hierarchical Structure for function approximation using radial basis function  

Science Conference Proceedings (OSTI)

The hierarchial network proposed (Multi-RBFNN), is composed of complete Radial Basis Function Neural Networks (RBFNNs) that are in charge of a reduced set of input variables with the property of which every Sub-RBFNN can take charge of a set of input ... Keywords: function approximation, hierarchical architectures, input variable selection, radial bases functions

A. Awad; H. Pomares; I. Rojas; L. J. Herrera; A. Guillen; O. Valenzuela

2005-12-01T23:59:59.000Z

204

Uniqueness and Approximated Computation of Optimal Incomplete Transportation Plans  

E-Print Network (OSTI)

Uniqueness and Approximated Computation of Optimal Incomplete Transportation Plans P. C. ´Alvarez Transportation, where a part of the mass could be not necessarily transported. Since optimal transportation plans consistency result. As a remarkable and unexpected additional result, with important implications for future

Cuesta, Juan Antonio

205

On the Approximability of Reachability Preserving Network Orientations  

E-Print Network (OSTI)

On the Approximability of Reachability Preserving Network Orientations Michael Elberfeld Institute@post.tau.ac.il Abstract We introduce a graph orientation problem arising in the study of biological networks. Given an undirected graph and a list of ordered source-target vertex pairs, the goal is to orient the graph

Sharan, Roded

206

Matrix Approximation and Projective Clustering via Iterative Sampling  

E-Print Network (OSTI)

We present two new results for the problem of approximating a given real m by n matrix A by a rank-k matrix D, where k < min{m, n}, so as to minimize ||A-D||_F^2. It is known that bysampling O(k/eps) rows of the matrix, ...

Rademacher, Luis

2005-03-29T23:59:59.000Z

207

APPROXIMATE DYNAMIC PROGRAMMING METHODS FOR COOPERATIVE UAV SEARCH  

E-Print Network (OSTI)

APPROXIMATE DYNAMIC PROGRAMMING METHODS FOR COOPERATIVE UAV SEARCH Matthew Flint Emmanuel 01801 matt.flint@baesystems.com Dept. of Electrical and Computer Engineering and Computer Science by the authors of this paper e.g. (Flint et al., 2003b), (Flint et al., 2003a), (Flint et al., 2004); and others

Fernandez, Emmanuel

208

Gluon Condensate in Pion Superfluid beyond Mean Field Approximation  

E-Print Network (OSTI)

We study gluon condensate in a pion superfluid, through calculating the equation of state of the system in the Nambu-Jona-Lasinio model. While in mean field approximation the growing pion condensate leads to an increasing gluon condensate, meson fluctuations reduce the gluon condensate and the broken scalar symmetry can be smoothly restored at finite isospin density.

Yin Jiang; Pengfei Zhuang

2010-12-10T23:59:59.000Z

209

Elastic approximation for a solar parabolic February 29, 2012  

E-Print Network (OSTI)

Elastic approximation for a solar parabolic trough February 29, 2012 Gang Xiao (University of Nice, France) Abstract For the production of the reective surface of a solar parabolic trough concentrator energy solutions. Introduction A parabolic trough [8] is a concentrating solar thermal energy collector

Paris-Sud XI, Université de

210

Weak lensing and the Dyer-Roeder approximation  

E-Print Network (OSTI)

The distance-redshift relation plays an important role in cosmology. In the standard approach to cosmology it is assumed that this relation is the same as in the homogeneous universe. As the real universe is not homogeneous there are several methods to calculate the correction. The weak lensing approximation and the Dyer-Roeder relation are one of them. This paper establishes a link between these two approximations. It is shown that if the universe is homogeneous with only small, vanishing after averaging, density fluctuations along the line of sight, then the distance correction is negligible. It is also shown that a vanishing 3D average of density fluctuations does not imply that the mean of density fluctuations along the line of sight is zero. In this case, even within the linear approximation, the distance correction is not negligible. The modified version of the Dyer-Roeder relation is presented and it is shown that this modified relation is consistent with the correction obtained within the weak lensing approximation. The correction to the distance for a source at z ~ 2 is of order of a few percent. Thus, with an increasing precision of cosmological observations an accurate estimation of the distance is essential. Otherwise errors due to miscalculation the distance can become a major source of systematics.

Krzysztof Bolejko

2010-11-17T23:59:59.000Z

211

Absorption Approximation with Scattering Effect for Infrared Radiation  

Science Conference Proceedings (OSTI)

A scheme that can handle cloud infrared scattering based on the absorption approximation is developed. In a two-stream mode, the new scheme produces more accurate results than those from the modified two-stream discrete ordinate method. For low ...

J. Li; Qiang Fu

2000-09-01T23:59:59.000Z

212

Fine-grained efficient resource allocation using approximated combinatorial auctions: A parallel greedy winner approximation for large-scale problems  

Science Conference Proceedings (OSTI)

Combinatorial auctions, one of the most popular market mechanisms, have a huge effect on electronic markets and political strategies. Combinatorial auctions provide suitable mechanisms for efficient allocation of resources to self-interested attendees. ... Keywords: approximation, combinatorial auction, multi-agent system, optimization, resource allocation

Naoki Fukuta; Takayuki Ito

2009-01-01T23:59:59.000Z

213

Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations  

SciTech Connect

It is apparent to anyone who thinks about it that, to a large degree, the basic concepts of Newtonian physics are quite intuitive, but quantum mechanics is not. My purpose in this talk is to introduce you to a new, much more intuitive way to understand how quantum mechanics works. I begin with an incredibly easy way to derive the time evolution of a Gaussian wave-packet for the case free and harmonic motion without any need to know the eigenstates of the Hamiltonian. This discussion is completely analytic and I will later use it to relate the solution for the behavior of the Gaussian packet to the Feynman path-integral and stationary phase approximation. It will be clear that using the information about the evolution of the Gaussian in this way goes far beyond what the stationary phase approximation tells us. Next, I introduce the concept of the bucket brigade approach to dealing with problems that cannot be handled totally analytically. This approach combines the intuition obtained in the initial discussion, as well as the intuition obtained from the path-integral, with simple numerical tools. My goal is to show that, for any specific process, there is a simple Hilbert space interpretation of the stationary phase approximation. I will then argue that, from the point of view of numerical approximations, the trajectory obtained from my generalization of the stationary phase approximation specifies that subspace of the full Hilbert space that is needed to compute the time evolution of the particular state under the full Hamiltonian. The prescription I will give is totally non-perturbative and we will see, by the grace of Maple animations computed for the case of the anharmonic oscillator Hamiltonian, that this approach allows surprisingly accurate computations to be performed with very little work. I think of this approach to the path-integral as defining what I call a guided numerical approximation scheme. After the discussion of the anharmonic oscillator I will turn to tunneling problems and show that the instanton can also be though of in the same way. I will do this for the classic problem of a double well potential in the extreme limit when the splitting between the two lowest levels is extremely small and the tunneling rate from one well to another is also very small.

Weinstein, Marvin; /SLAC

2009-02-12T23:59:59.000Z

214

projects are valued at approximately $67 million (including $15 million  

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

projects are valued at approximately $67 million (including $15 million projects are valued at approximately $67 million (including $15 million in non-Federal cost sharing) over four years. The overall goal of the research is to develop carbon dioxide (CO 2 ) capture and separation technologies that can achieve at least 90 percent CO 2 removal at no more than a 35 percent increase in the cost of electricity. The projects, managed by FE's National Energy Technology Laboratory (NETL), include: (1) Linde, LLC, which will use a post-combustion capture technology incorporating BASF's novel amine-based process at a 1-megawatt electric (MWe) equivalent slipstream pilot plant at the National Carbon Capture Center (NCCC) (DOE contribution: $15 million); (2) Neumann Systems Group, Inc., which will design, construct, and test a patented NeuStreamTM absorber at the Colorado

215

A Multithreaded Algorithm for Network Alignment Via Approximate Matching  

SciTech Connect

Network alignment is an optimization problem to find the best one-to-one map between the vertices of a pair of graphs that overlaps in as many edges as possible. It is a relaxation of the graph isomorphism problem and is closely related to the subgraph isomorphism problem. The best current approaches are entirely heuristic, and are iterative in nature. They generate real-valued heuristic approximations that must be rounded to find integer solutions. This rounding requires solving a bipartite maximum weight matching problem at each step in order to avoid missing high quality solutions. We investigate substituting a parallel, half-approximation for maximum weight matching instead of an exact computation. Our experiments show that the resulting difference in solution quality is negligible. We demonstrate almost a 20-fold speedup using 40 threads on an 8 processor Intel Xeon E7-8870 system (from 10 minutes to 36 seconds).

Khan, Arif; Gleich, David F.; Pothen, Alex; Halappanavar, Mahantesh

2012-11-16T23:59:59.000Z

216

Boussinesq approximation of the Cahn-Hilliard-Navier-Stokes equations  

E-Print Network (OSTI)

We study the interactions between the thermodynamic transition and hydrodynamic flows which would characterise a thermo- and hydro-dynamic evolution of a binary mixture in a dissolution/nucleation process. The primary attention is given to the slow dissolution dynamics. The Cahn-Hilliard approach is used to model the behaviour of evolving and diffusing interfaces. An important peculiarity of the full Cahn-Hilliard-Navier-Stokes equations is the use of the full continuity equation required even for a binary mixture of incompressible liquids, firstly, due to dependence of mixture density on concentration and, secondly, due to strong concentration gradients at liquids' interfaces. Using the multiple-scale method we separate the physical processes occurring on different time scales and, ultimately, provide a strict derivation of the Boussinesq approximation for the Cahn-Hilliard-Navier-Stokes equations. This approximation forms a universal theoretical model that can be further employed for a thermo/hydro-dynamic ...

Vorobev, Anatoliy

2010-01-01T23:59:59.000Z

217

A family of algorithms for approximate Bayesian inference  

E-Print Network (OSTI)

One of the major obstacles to using Bayesian methods for pattern recognition has been its computational expense. This thesis presents an approximation technique that can perform Bayesian inference faster and more accurately than previously possible. This method, "Expectation Propagation," unifies and generalizes two previous techniques: assumeddensity filtering, an extension of the Kalman filter, and loopy belief propagation, an extension of belief propagation in Bayesian networks. The unification shows how both of these algorithms can be viewed as approximating the true posterior distribution with a simpler distribution, which is close in the sense of KL-divergence. Expectation Propagation exploits the best of both algorithms: the generality of assumed-density filtering and the accuracy of loopy belief propagation. Loopy belief propagation, because it propagates exact belief states, is useful for limited types of belief networks, such as purely discrete networks. Expectation Propagati...

Rosalind Picard; Thomas P. Minka; Thomas P Minka

2001-01-01T23:59:59.000Z

218

Product-state Approximations to Quantum Ground States  

E-Print Network (OSTI)

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.

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

2013-09-30T23:59:59.000Z

219

Beyond the Quantum Adiabatic Approximation: Adiabatic Perturbation Theory  

E-Print Network (OSTI)

We introduce a perturbative approach to solving the time dependent Schroedinger equation, named adiabatic perturbation theory (APT), whose zeroth order term is the quantum adiabatic approximation. The small parameter in the power series expansion of the time-dependent wave function is the inverse of the time it takes to drive the system's Hamiltonian from the initial to its final form. We review other standard perturbative and non-perturbative ways of going beyond the adiabatic approximation, extending and finding exact relations among them, and also compare the efficiency of those methods against the APT. Most importantly, we determine APT corrections to the Berry phase by use of the Aharonov-Anandan geometric phase. We then solve several time dependent problems allowing us to illustrate that the APT is the only perturbative method that gives the right corrections to the adiabatic approximation. Finally, we propose an experiment to measure the APT corrections to the Berry phase and show, for a particular spin-1/2 problem, that to first order in APT the geometric phase should be two and a half times the (adiabatic) Berry phase.

Gustavo Rigolin; Gerardo Ortiz; Victor Hugo Ponce

2008-07-09T23:59:59.000Z

220

Local Linear Convergence of Approximate Projections onto Regularized Sets  

E-Print Network (OSTI)

The numerical properties of algorithms for finding the intersection of sets depend to some extent on the regularity of the sets, but even more importantly on the regularity of the intersection. The alternating projection algorithm of von Neumann has been shown to converge locally at a linear rate dependent on the regularity modulus of the intersection. In many applications, however, the sets in question come from inexact measurements that are matched to idealized models. It is unlikely that any such problems in applications will enjoy metrically regular intersection, let alone set intersection. We explore a regularization strategy that generates an intersection with the desired regularity properties. The regularization, however, can lead to a significant increase in computational complexity. In a further refinement, we investigate and prove linear convergence of an approximate alternating projection algorithm. The analysis provides a regularization strategy that fits naturally with many ill-posed inverse problems, and a mathematically sound stopping criterion for extrapolated, approximate algorithms. The theory is demonstrated on the phase retrieval problem with experimental data. The conventional early termination applied in practice to unregularized, consistent problems in diffraction imaging can be justified fully in the framework of this analysis providing, for the first time, proof of convergence of alternating approximate projections for finite dimensional, consistent phase retrieval problems.

D. Russell Luke

2011-08-10T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Approximate Controllability for Linear Stochastic Differential Equations in Infinite Dimensions  

SciTech Connect

The objective of the paper is to investigate the approximate controllability property of a linear stochastic control system with values in a separable real Hilbert space. In a first step we prove the existence and uniqueness for the solution of the dual linear backward stochastic differential equation. This equation has the particularity that in addition to an unbounded operator acting on the Y-component of the solution there is still another one acting on the Z-component. With the help of this dual equation we then deduce the duality between approximate controllability and observability. Finally, under the assumption that the unbounded operator acting on the state process of the forward equation is an infinitesimal generator of an exponentially stable semigroup, we show that the generalized Hautus test provides a necessary condition for the approximate controllability. The paper generalizes former results by Buckdahn, Quincampoix and Tessitore (Stochastic Partial Differential Equations and Applications, Series of Lecture Notes in Pure and Appl. Math., vol. 245, pp. 253-260, Chapman and Hall, London, 2006) and Goreac (Applied Analysis and Differential Equations, pp. 153-164, World Scientific, Singapore, 2007) from the finite dimensional to the infinite dimensional case.

Goreac, D. [Universite Paris-Est, LAMA, UMR 8050 (France)], E-mail: dan.goreac@univ-mlv.fr

2009-08-15T23:59:59.000Z

222

Analytical Approximation for 2-D Nonlinear Periodic Deep Water Waves  

E-Print Network (OSTI)

A recently 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 solution in two dimensions with rigorous error bounds for a set of parameter values that correspond to heights slightly smaller than the critical. The wave shapes are shown to be analytic. The method presented in quite general and does not assume smallness of wave height or steepness and can be readily extended to other interfacial problems involving Laplace's equation.

Saleh Tanveer

2013-09-20T23:59:59.000Z

223

Approximating RR Lyrae light curves using cubic polynomials  

E-Print Network (OSTI)

In this paper, we use cubic polynomials to approximate RR Lyrae light curves and apply the method to HST data of RR Lyraes in the halo of M31. We compare our method to the standard method of Fourier decomposition and find that the method of cubic polynomials eliminates virtually all ringing effects and does so with significantly fewer parameters than the Fourier technique. Further, for RRc stars the parameters in the fit are all physical. Our study also reveals a number of additional periodicites in this data not found previously: we find 23 RRc stars, 29 RRab stars and 3 multiperiodic stars.

Reyner, Steven; Ngeow, C; Morgan, C

2010-01-01T23:59:59.000Z

224

Asymptotic analysis of multiscale approximations to reaction networks  

E-Print Network (OSTI)

A reaction network is a chemical system involving multiple reactions and chemical species. Stochastic models of such networks treat the system as a continuous time Markov chain on the number of molecules of each species with reactions as possible transitions of the chain. In many cases of biological interest some of the chemical species in the network are present in much greater abundance than others and reaction rate constants can vary over several orders of magnitude. We consider approaches to approximation of such models that take the multiscale nature of the system into account. Our primary example is a model of a cells viral infection for which we apply a combination of averaging and law of large number arguments to show that the slow component of the model can be approximated by a deterministic equation and to characterize the asymptotic distribution of the fast components. The main goal is to illustrate techniques that can be used to reduce the dimensionality of much more complex models. 1. Stochastic models for reaction networks. A reaction network is a chemical system involving multiple reactions and chemical species. The simplest stochastic model for a network treats the system as a continuous time Markov chain whose state X is a vector giving the number of molecules of each species present with each reaction modeled as a possible transition for the state. The model for the kth reaction is determined by a vector of inputs ?k specifying the number of molecules of each chemical species that are

Karen Ball; Thomas G. Kurtz; Lea Popovic; Greg Rempala

1961-01-01T23:59:59.000Z

225

Complexity and approximability of certain bicriteria location problems  

SciTech Connect

We investigate the complexity and approximability of some location problems when two distance values are specified for each pair of potential sites. These problems involve the selection of a specified number of facilities (i.e. a placement of a specified size) to minimize a function of one distance metric subject to a budget constraint on the other distance metric. Such problems arise in several application areas including statistical clustering, pattern recognition and load-balancing in distributed systems. We show that, in general, obtaining placements that are near-optimal with respect to the first distance metric is NP-hard even when we allow the budget constraint on the second distance metric to be violated by a constant factor. However, when both the distance metrics satisfy the triangle inequality, we present approximation algorithms that produce placements which are near-optimal with respect to the first distance metric while violating the budget constraint only by a small constant factor. We also present polynomial algorithms for these problems when the underlying graph is a tree.

Krumke, S.O.; Noltemeier, H. [Wuerzburg Univ. (Germany); Ravi, S.S. [State Univ. of New York, Albany, NY (United States); Marathe, M.V. [Los Alamos National Lab., NM (United States)

1995-10-01T23:59:59.000Z

226

Nonadiabatic charged spherical evolution in the postquasistatic approximation  

Science Conference Proceedings (OSTI)

We apply the postquasistatic approximation, an iterative method for the evolution of self-gravitating spheres of matter, to study the evolution of dissipative and electrically charged distributions in general relativity. The numerical implementation of our approach leads to a solver which is globally second-order convergent. We evolve nonadiabatic distributions assuming an equation of state that accounts for the anisotropy induced by the electric charge. Dissipation is described by streaming-out or diffusion approximations. We match the interior solution, in noncomoving coordinates, with the Vaidya-Reissner-Nordstroem exterior solution. Two models are considered: (i) a Schwarzschild-like shell in the diffusion limit; and (ii) a Schwarzschild-like interior in the free-streaming limit. These toy models tell us something about the nature of the dissipative and electrically charged collapse. Diffusion stabilizes the gravitational collapse producing a spherical shell whose contraction is halted in a short characteristic hydrodynamic time. The streaming-out radiation provides a more efficient mechanism for emission of energy, redistributing the electric charge on the whole sphere, while the distribution collapses indefinitely with a longer hydrodynamic time scale.

Rosales, L. [Laboratorio de Fisica Computacional, Universidad Experimental Politecnica 'Antonio Jose de Sucre', Puerto Ordaz (Venezuela, Bolivarian Republic of); Barreto, W. [Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of); Peralta, C. [Deutscher Wetterdienst, Frankfurter Str. 135, 63067 Offenbach (Germany); School of Physics, University of Melbourne, Parkville, VIC 3010 (Australia); Rodriguez-Mueller, B. [Computational Science Research Center, College of Sciences, San Diego State University, San Diego, California (United States)

2010-10-15T23:59:59.000Z

227

5-Axis Freeform Surface Milling using Piecewise Ruled Surface Approximation  

E-Print Network (OSTI)

This paper presents a 5-axis side milling scheme for freeform surfaces based on automatic piecewise ruled surface approximation. With this scheme, resulting surface finish is accurate and pleasing, and has a smaller scallop height compared to ball-end milling. The ruled surface approximation can be made arbitrarily precise resulting in an overall fast milling operation that satisfies tight tolerances, and smoother surface finish. The class of surfaces that can take advantage of this type of 5-axis milling operation includes both convex and saddle-like (hyperbolic) shapes. 1 Introduction The automatic toolpath generation for manufacturing of models consisting of freeform surfaces is a difficult problem addressed by numerous researchers [Bob85, Choi89, Choi93, Chou89, Elb93, Elb94, Fers86, Jera91, Lone87, Sait91, Spen90, Zhan86]. 3-axis machining [Bob85, Choi89, Fers86, Jera91, Lone87, Sait91, Spen90, Zhan86] is more frequently used than 4- or 5-axis machining modes. While deri...

Gershon Elber; Russ Fish

2000-01-01T23:59:59.000Z

228

Vehicle routing and staffing for sedan service  

E-Print Network (OSTI)

response to single a new input, this yields a system in which the car service ... throughout the scheduling day (continual), and on demand with 15-second.

229

Approximate Weighted Matching On Emerging Manycore and Multithreaded Architectures  

SciTech Connect

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.

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

2012-11-30T23:59:59.000Z

230

Improved first order mean spherical approximation for simple fluids  

E-Print Network (OSTI)

A perturbation approach based on the first-order mean spherical approximation (FMSA) is proposed. It consists in adopting a hard-sphere plus short-range attractive Yukawa fluid as the novel reference system, over which the perturbative solution of the Ornstein-Zernike equation is performed. A choice of the optimal range of the reference attraction is discussed. The results are compared against conventional FMSA/HS theory and Monte-Carlo simulation data for compressibility factor and vapor-liquid phase diagrams of the medium-ranged Yukawa fluid. Proposed theory keeps the same level of simplicity and transparency, as the conventional FMSA/HS approach does, but shows to be more accurate.

S. Hlushak; A. Trokhymchuk; I. Nezbeda

2012-02-20T23:59:59.000Z

231

Pion - Nucleon Bremsstrahlung beyond the Soft-Photon approximation  

E-Print Network (OSTI)

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.

A. Mariano

2000-04-06T23:59:59.000Z

232

Finite temperature electronic simulations beyond the Born-Oppenheimer approximation  

E-Print Network (OSTI)

We introduce a general technique to compute finite temperature electronic properties by a novel covariant formulation of the electronic partition function. By using a rigorous variational upper bound to the free energy we are led to the evaluation of a partition function that can be computed stochastically by sampling electronic wave functions and atomic positions (assumed classical). In order to achieve this target we show that it is extremely important to consider the non trivial geometry of the space defined by the wave function ansatz. The method can be extended to any technique capable to provide an energy value over a given wave function ansatz depending on several variational parameters and atomic positions. In particular we can take into account electronic correlation, by using the standard variational quantum Monte Carlo method, that has been so far limited to zero temperature ground state properties. We show that our approximation reduces correctly to the standard Born-Oppenheimer (BO) one at zero t...

Mazzola, Guglielmo; Sorella, Sandro

2013-01-01T23:59:59.000Z

233

COSMOLOGICAL POST-NEWTONIAN APPROXIMATION COMPARED WITH PERTURBATION THEORY  

Science Conference Proceedings (OSTI)

We compare the cosmological first-order post-Newtonian (1PN) approximation with the relativistic cosmological linear perturbation theory in a zero-pressure medium with the cosmological constant. We compare equations and solutions in several different gauge conditions available in both methods. In the PN method we have perturbation equations for density, velocity, and gravitational potential independently of the gauge condition to 1PN order. However, correspondences with these 1PN equations are available only in certain gauge conditions in the perturbation theory. Equations of perturbed velocity and the perturbed gravitational potential in the zero-shear gauge exactly coincide with the Newtonian equations, which remain valid even to 1PN order (the same is true for perturbed velocity identified in the comoving gauge), and equations of perturbed density in the zero-shear gauge and the uniform-expansion gauge coincide to 1PN order. We identify other correspondences available in different gauge conditions of the perturbation theory.

Noh, Hyerim [Korea Astronomy and Space Science Institute, Daejon 305-348 (Korea, Republic of); Hwang, Jai-chan [Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu 702-701 (Korea, Republic of)

2012-10-01T23:59:59.000Z

234

ANALYTIC APPROXIMATION OF CARBON CONDENSATION ISSUES IN TYPE II SUPERNOVAE  

SciTech Connect

I present analytic approximations for some issues related to condensation of graphite, TiC, and silicon carbide in oxygen-rich cores of supernovae of Type II. Increased understanding, which mathematical analysis can support, renders researchers more receptive to condensation in O-rich supernova gases. Taking SN 1987A as typical, my first analysis shows why the abundance of CO molecules reaches an early maximum in which free carbon remains more abundant than CO. This analysis clarifies why O-rich gas cannot oxidize C if {sup 56}Co radioactivity is as strong as in SN 1987A. My next analysis shows that the CO abundance could be regarded as being in chemical equilibrium if the CO molecule is given an effective binding energy rather than its laboratory dissociation energy. The effective binding energy makes the thermal dissociation rate of CO equal to its radioactive dissociation rate. This preserves possible relevance for the concept of chemical equilibrium. My next analysis shows that the observed abundances of CO and SiO molecules in SN 1987A rule out frequent suggestions that equilibrium condensation of SUNOCONs has occurred following atomic mixing of the He-burning shell with more central zones in such a way as to reproduce roughly the observed spectrum of isotopes in SUNOCONs while preserving C/O > 1. He atoms admixed along with the excess carbon would destroy CO and SiO molecules, leaving their observed abundances unexplained. The final analysis argues that a chemical quasiequilibrium among grains (but not gas) may exist approximately during condensation, so that its computational use is partially justified as a guide to which mineral phases would be stable against reactions with gas. I illustrate this point with quasiequilibrium calculations by Ebel and Grossman that have shown that graphite is stable even when O/C >1 if prominent molecules are justifiably excluded from the calculation of chemical equilibrium.

Clayton, Donald D., E-mail: claydonald@gmail.com [Department of Physics and Astronomy, Clemson University, Clemson, SC (United States)

2013-01-01T23:59:59.000Z

235

A Hierarchy of Approximations of the Master Equation Scaled by a Size Parameter  

Science Conference Proceedings (OSTI)

Solutions of the master equation are approximated using a hierarchy of models based on the solution of ordinary differential equations: the macroscopic equations, the linear noise approximation and the moment equations. The advantage with the approximations ... Keywords: Linear noise approximation, Master equation, Moment equations, Reaction rate equations

Lars Ferm; Per Ltstedt; Andreas Hellander

2008-02-01T23:59:59.000Z

236

Evolution of primordial magnetic fields in mean-field approximation  

E-Print Network (OSTI)

We study the evolution of phase-transition-generated cosmic magnetic fields coupled to the primeval cosmic plasma in turbulent and viscous free-streaming regimes. The evolution laws for the magnetic energy density and correlation length, both in helical and non-helical cases, are found by solving the autoinduction and Navier-Stokes equations in mean-field approximation. Analytical results are derived in Minkowski spacetime and then extended to the case of a Friedmann universe with zero spatial curvature, both in radiation and matter dominated eras. The three possible viscous free-streaming phases are characterized by a drag term in the Navier-Stokes equation which depends on the free-steaming properties of neutrinos, photons, or hydrogen atoms, respectively. In the case of non-helical magnetic fields, the magnetic intensity $B$ and the magnetic correlation length $\\xi_B$ evolve asymptotically with the temperature $T$ as $B(T) \\simeq \\kappa_B (N_i v_i)^{\\varrho_1} (T/T_i)^{\\varrho_2}$ and $\\xi_B(T) \\simeq \\kap...

Campanelli, Leonardo

2013-01-01T23:59:59.000Z

237

A Sublogarithmic Approximation for Highway and Tollbooth Pricing  

E-Print Network (OSTI)

An instance of the tollbooth problem consists of an undirected network and a collection of single-minded customers, each of which is interested in purchasing a fixed path subject to an individual budget constraint. The objective is to assign a per-unit price to each edge in a way that maximizes the collective revenue obtained from all customers. The revenue generated by any customer is equal to the overall price of the edges in her desired path, when this cost falls within her budget; otherwise, that customer will not purchase any edge. Our main result is a deterministic algorithm for the tollbooth problem on trees whose approximation ratio is O(log m / log log m), where m denotes the number of edges in the underlying graph. This finding improves on the currently best performance guarantees for trees, due to Elbassioni et al. (SAGT '09), as well as for paths (commonly known as the highway problem), due to Balcan and Blum (EC '06). An additional interesting consequence is a computational separation between tol...

Gamzu, Iftah

2010-01-01T23:59:59.000Z

238

Controlled Nonlinear Stochastic Delay Equations: Part I: Modeling and Approximations  

SciTech Connect

This two-part paper deals with 'foundational' issues that have not been previously considered in the modeling and numerical optimization of nonlinear stochastic delay systems. There are new classes of models, such as those with nonlinear functions of several controls (such as products), each with is own delay, controlled random Poisson measure driving terms, admissions control with delayed retrials, and others. There are two basic and interconnected themes for these models. The first, dealt with in this part, concerns the definition of admissible control. The classical definition of an admissible control as a nonanticipative relaxed control is inadequate for these models and needs to be extended. This is needed for the convergence proofs of numerical approximations for optimal controls as well as to have a well-defined model. It is shown that the new classes of admissible controls do not enlarge the range of the value functions, is closed (together with the associated paths) under weak convergence, and is approximatable by ordinary controls. The second theme, dealt with in Part II, concerns transportation equation representations, and their role in the development of numerical algorithms with much reduced memory and computational requirements.

Kushner, Harold J., E-mail: hjk@dam.brown.edu [Brown University, Applied Math (United States)

2012-08-15T23:59:59.000Z

239

Asymptotic safety in the f(R) approximation  

E-Print Network (OSTI)

In the asymptotic safety programme for quantum gravity, it is important to go beyond polynomial truncations. Three such approximations have been derived where the restriction is only to a general function f(R) of the curvature R>0. We confront these with the requirement that a fixed point solution be smooth and exist for all non-negative R. Singularities induced by cutoff choices force the earlier versions to have no such solutions. However, we show that the most recent version has a number of lines of fixed points, each supporting a continuous spectrum of eigen-perturbations. We uncover and analyse the first five such lines. Sensible fixed point behaviour may be achieved if one consistently incorporates geometry/topology change. As an exploratory example, we analyse the equations analytically continued to R<0, however we now find only partial solutions.We show how these results are always consistent with, and to some extent can be predicted from, a straightforward analysis of the constraints inherent in the equations.

Juergen A. Dietz; Tim R. Morris

2012-11-05T23:59:59.000Z

240

2008. Approximating learning curves for active-learning-driven annotation  

E-Print Network (OSTI)

Active learning (AL) is getting more and more popular as a methodology to considerably reduce the annotation effort when building training material for statistical learning methods for various NLP tasks. A crucial issue rarely addressed, however, is when to actually stop the annotation process to profit from the savings in efforts. This question is tightly related to estimating the classifier performance after a certain amount of data has already been annotated. While learning curves are the default means to monitor the progress of the annotation process in terms of classifier performance, this requires a labeled gold standard which in realistic annotation settings, at least is often unavailable. We here propose a method for committee-based AL to approximate the progression of the learning curve based on the disagreement among the committee members. This method relies on a separate, unlabeled corpus and is thus well suited for situations where a labeled gold standard is not available or would be too expensive to obtain. Considering named entity recognition as a test case we provide empirical evidence that this approach works well under simulation as well as under real-world annotation conditions. 1.

Katrin Tomanek; Udo Hahn

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

The Framework for Approximate Queries on Simulation Data  

SciTech Connect

AQSim is a system intended to enable scientists to query and analyze a large volume of scientific simulation data. The system uses the state of the art in approximate query processing techniques to build a novel framework for progressive data analysis. These techniques are used to define a multi-resolution index, where each node contains multiple models of the data. The benefits of these models are two-fold: (1) they are compact representations, reconstructing only the information relevant to the analysis, and (2) the variety of models capture different aspects of the data which may be of interest to the user but are not readily apparent in their raw form. To be able to deal with the data interactively, AQSim allows the scientist to make an informed tradeoff between query response accuracy and time. In this paper, we present the framework of AQSim with a focus on its architectural design. We also show the results from an initial proof-of-concept prototype developed at LLNL. The presented framework is generic enough to handle more than just simulation data.

Abdulla, G; Baldwin, C; Critchlow, T; Kamimura, R; Lee, B; Musick, R; Snapp, R; Tang, N

2001-09-27T23:59:59.000Z

242

Comparison of Daily Averaged Reflection, Transmission, and Absorption for Selected Radiative Flux Transfer Approximations  

Science Conference Proceedings (OSTI)

This paper compares accuracy for the daily averaged reflection, transmission, and absorption of solar flux derived from the delta-four-stream approximation and a few selected two-stream approximations. In the chosen variety of two-stream ...

Xun Zhu; Albert Arking

1994-12-01T23:59:59.000Z

243

Numerical Approximations Can Create Chaos-related Errors in Blocking Forecasts  

Science Conference Proceedings (OSTI)

The chaotic structure of two-dimensional atmospheric flow is illustrated. It is shown that certain errors in numerical approximations can Prevent the correct prediction of chaotic processes. This is the case when the numerical approximations do ...

Juhani Rinne; Heikki Jrvinen

1992-05-01T23:59:59.000Z

244

CLUSTER-VARIATION METHOD FOR THE TRIANGULAR LATTICE GAS II. TRIANGLE APPROXIMATION  

E-Print Network (OSTI)

with the zero~field lattice gas can be identified IsingFOR THE TRIANGULAR LATTICE GAS II. TRIANGLE APPROXIMATION R.method for the triangular lattice gas Triangle approximation

Osorio, R.

2013-01-01T23:59:59.000Z

245

Extension of the weak-line approximation and application to correlated-k methods  

Science Conference Proceedings (OSTI)

Global climate models require accurate and rapid computation of the radiative transfer through the atmosphere. Correlated-k methods are often used. One of the approximations used in correlated-k models is the weakline approximation. We introduce an approximation T/sub g/ which reduces to the weak-line limit when optical depths are small, and captures the deviation from the weak-line limit as the extinction deviates from the weak-line limit. This approximation is constructed to match the first two moments of the gamma distribution to the k-distribution of the transmission. We compare the errors of the weak-line approximation with T/sub g/ in the context of a water vapor spectrum. The extension T/sub g/ is more accurate and converges more rapidly than the weak-line approximation.

Conley, A.J.; Collins, W.D.

2011-03-15T23:59:59.000Z

246

Table A6. Approximate Heat Rates for Electricity, and Heat Content ...  

U.S. Energy Information Administration (EIA)

State energy information, detailed and overviews. Maps. ... Table A6. Approximate Heat Rates for Electricity, and Heat Content of Electricity, 1949-2011

247

Low complexity channel models for approximating flat Rayleigh fading in network simulations  

E-Print Network (OSTI)

The intricate dependency of networking protocols upon the performance of the wireless channel motivates the investigation of network channel approximations for fading channels. Wireless networking protocols are increasingly being designed and evaluated with the assistance of networking simulators. While evaluating networking protocols such as medium access control, routing, and reliable transport, the network channel model, and its associated capacity, will drastically impact the achievable network throughput. Researcher relying upon simulation results must therefore use extreme caution to ensure the use of similar channel models when performing protocol comparisons. Some channel approximations have been created to mimic the behavior of a fading environment, however there exists little to no justification for these channel approximations. This dissertation addresses the need for a computationally efficient fading channel approximation for use in network simulations. A rigorous flat fading channel model was developed for use in accuracy measurements of channel approximations. The popular two-state Markov model channel approximation is analyzed and shown to perform poorly for low to moderate signal-to-noise ratios (SNR). Three novel channel approximations are derived, with multiple methods of parameter estimation. Each model is analyzed for both statistical performance and network performance. The final model is shown to achieve very accurate network throughput performance by achieving a very close matching of the frame run distributions. This work provides a rigorous evaluation of the popular two-state Markov model, and three novel low complexity channel models in both statistical accuracy and network throughput performance. The novel models are formed through attempts to match key statistical parameters of frame error run and good frame run statistics. It is shown that only matching key parameters is insufficient to achieve an acceptable channel approximation and that it is necessary to approximate the distribution of frame error duration and good frame run duration. The final novel channel approximation, the three-state run-length model, is shown to achieve a good approximation of the desired distributions when some key statistical parameters are matched.

McDougall, Jeffrey Michael

2003-08-01T23:59:59.000Z

248

Relationship between swelling and irradiation creep in cold-worked PCA stainless steel irradiated to {approximately}178 dpa at {approximately}400{degrees}C  

Science Conference Proceedings (OSTI)

The eighth and final irradiation segment for pressurized tubes constructed from the fusion Prime Candidate Alloy (PCA) has been completed in FFTF. At 178 dpa and {approximately}400{degrees}C, the irradiation creep of 20% cold-worked PCA has become dominated by the {open_quotes}creep disappearance{close_quotes} phenomenon. The total diametral deformation rate has reached the limiting value of 0.33%/dpa at the three highest stress levels employed in this test. The stress-enhancement of swelling tends to camouflage the onset of creep disappearance, however, requiring the use of several non-traditional techniques to extract the creep coefficients. No failures occurred in these tubes, even though the swelling ranged from {approximately}20 to {approximately}40%.

Toloczko, M.B. [Univ. of California, Santa Barbara, CA (United States). Dept. of Chemical and Nuclear Engineering; Garner, F.A. [Pacific Northwest Lab., Richland, WA (United States)

1993-09-01T23:59:59.000Z

249

An accurate approximation to the average error probability of cooperative diversity in Nakagami-m fading  

Science Conference Proceedings (OSTI)

A new approximation to the average symbol error rate of cooperative diversity is derived for independent and non-identically distributed Nakagami-m fading channels. The new approximation has the same computational complexity as previous lower bounds ... Keywords: Nakagami, cooperative diversity, fading channels, symbol error rate

Norman C. Beaulieu; Yunfei Chen

2010-09-01T23:59:59.000Z

250

Optimal approximations for risk measures of sums of lognormals based on conditional expectations  

Science Conference Proceedings (OSTI)

In this paper we investigate the approximations for the distribution function of a sum S of lognormal random variables. These approximations are obtained by considering the conditional expectation E[S|@L] of S with respect to a conditioning random variable ... Keywords: Comonotonicity, Conditional expectation, Jensen's inequality, Lognormal, Maximal variance

S. Vanduffel; X. Chen; J. Dhaene; M. Goovaerts; L. Henrard; R. Kaas

2008-11-01T23:59:59.000Z

251

Shock-compressible-vortex interactions: Computing approximate post-shock fields  

E-Print Network (OSTI)

Shock-compressible-vortex interactions: Computing approximate post-shock fields G.K. O'Reilly and D of the passage of a planar shock through a steady compressible vortex is developed. To compute the approximate post-shock fields, the steady pre-shock vortex is decomposed into a sum of frozen sinusoidal modes

Barr, Al

252

Certified Approximation of Parametric Space Curves with Cubic B-spline Curves  

E-Print Network (OSTI)

Approximating complex curves with simple parametric curves is widely used in CAGD, CG, and CNC. This paper presents an algorithm to compute a certified approximation to a given parametric space curve with cubic B-spline curves. By certified, we mean that the approximation can approximate the given curve to any given precision and preserve the geometric features of the given curve such as the topology, singular points, etc. The approximated curve is divided into segments called quasi-cubic B\\'{e}zier curve segments which have properties similar to a cubic rational B\\'{e}zier curve. And the approximate curve is naturally constructed as the associated cubic rational B\\'{e}zier curve of the control tetrahedron of a quasi-cubic curve. A novel optimization method is proposed to select proper weights in the cubic rational B\\'{e}zier curve to approximate the given curve. The error of the approximation is controlled by the size of its tetrahedron, which converges to zero by subdividing the curve segments. As an applic...

Shen, Liyong; Gao, Xiao-Shan

2012-01-01T23:59:59.000Z

253

On spectral approximation of static and dynamical problems for elastic multistructures  

Science Conference Proceedings (OSTI)

The present paper is devoted to the construction and investigation of algorithms of spectral approximation of three-dimensional problems for nonhomogeneous anisotropic elastic multistructures in curvilinear coordinates, which are junctions of three-dimensional ... Keywords: elastic multistructures, error bounds, spectral approximation

Gia Avalishvili; Mariam Avalishvili

2009-06-01T23:59:59.000Z

254

A scaling approximation for structure factors in the integral equation theory of polydisperse nonionic colloidal fluids  

E-Print Network (OSTI)

Integral equation of pure liquids, combined with a new "scaling approximation" based on a corresponding states treatment of pair correlation functions, is used to evaluate approximate structure factors for colloidal fluids constituted of uncharged particles with polydispersity in size and energy parameters. Both hard spheres and Lennard-Jones interactions are considered. For polydisperse hard spheres, the scaling approximation is compared to theories utilized by small angle scattering experimentalists (decoupling approximation, local monodisperse approximation)and to the van der Waals one-fluid theory. The results are tested against predictions from analytical expressions, exact within the Percus-Yevick approximation. For polydisperse Lennard-Jones particles, the scaling approximation combined with a "modified hypernetted chain" integral equation, is tested against molecular dynamics data generated for the present work. Despite ist simplicity, the scaling approximation exhibits a satisfactory performance for both potentials and represents a considerable improvement over the above mentioned theories. Shortcomings of the proposed theory, its applicability to the analysis of experimental scattering data, and its possible extensions to different potentials are finally discussed.

Domenico Gazzillo; Achille Giacometti; Raffaele G. Della Valle; Elisabetta Venuti; Flavio Carsughi

1999-07-23T23:59:59.000Z

255

Hardness of approximation and integer programming frameworks for searching for caterpillar trees  

Science Conference Proceedings (OSTI)

We consider the problems of finding a caterpillar tree in a graph. We first prove that, unless P=NP, there is no approximation algorithms for finding a minimum spanning caterpillar in a graph within a factor of f(n); where f(n) ... Keywords: approximation algorithm, caterpillar trees, integer programming, optimization, semidefinite programming

Micheal J. Dinneen, Masoud Khosravani

2011-01-01T23:59:59.000Z

256

Approximate deconvolution large eddy simulation of a barotropic ocean circulation model  

E-Print Network (OSTI)

This paper puts forth a new large eddy simulation closure modeling strategy for two-dimensional turbulent geophysical flows. This closure modeling approach utilizes approximate deconvolution, which is based solely on mathematical approximations and does not employ phenomenological arguments, such as the concept of an energy cascade. The new approximate deconvolution model is tested in the numerical simulation of the wind-driven circulation in a shallow ocean basin, a standard prototype of more realistic ocean dynamics. The model employs the barotropic vorticity equation driven by a symmetric double-gyre wind forcing, which yields a four-gyre circulation in the time mean. The approximate deconvolution model yields the correct four-gyre circulation structure predicted by a direct numerical simulation, on a much coarser mesh but at a fraction of the computational cost. This first step in the numerical assessment of the new model shows that approximate deconvolution could represent a viable alternative to standar...

San, Omer; Wang, Zhu; Iliescu, Traian

2011-01-01T23:59:59.000Z

257

Approximate treatment of electron Coulomb distortion in quasielastic (e,e') reactions  

E-Print Network (OSTI)

In this paper we address the adequacy of various approximate methods of including Coulomb distortion effects in (e,e') reactions by comparing to an exact treatment using Dirac-Coulomb distorted waves. In particular, we examine approximate methods and analyses of (e,e') reactions developed by Traini et al. using a high energy approximation of the distorted waves and phase shifts due to Lenz and Rosenfelder. This approximation has been used in the separation of longitudinal and transverse structure functions in a number of (e,e') experiments including the newly published 208Pb(e,e') data from Saclay. We find that the assumptions used by Traini and others are not valid for typical (e,e') experiments on medium and heavy nuclei, and hence the extracted structure functions based on this formalism are not reliable. We describe an improved approximation which is also based on the high energy approximation of Lenz and Rosenfelder and the analyses of Knoll and compare our results to the Saclay data. At each step of our analyses we compare our approximate results to the exact distorted wave results and can therefore quantify the errors made by our approximations. We find that for light nuclei, we can get an excellent treatment of Coulomb distortion effects on (e,e') reactions just by using a good approximation to the distorted waves, but for medium and heavy nuclei simple additional ad hoc factors need to be included. We describe an explicit procedure for using our approximate analyses to extract so-called longitudinal and transverse structure functions from (e,e') reactions in the quasielastic region.

K. S. Kim; L. E. Wright; Yanhe Jin; D. W. Kosik

2005-03-30T23:59:59.000Z

258

Optimal Constant-Time Approximation Algorithms and (Unconditional) Inapproximability Results for Every Bounded-Degree CSP  

E-Print Network (OSTI)

Raghavendra (STOC 2008) gave an elegant and surprising result: if Khot's Unique Games Conjecture (STOC 2002) is true, then for every constraint satisfaction problem (CSP), the best approximation ratio is attained by a certain simple semidefinite programming and a rounding scheme for it. In this paper, we show that a similar result holds for constant-time approximation algorithms in the bounded-degree model. Specifically, we present the followings: (i) For every CSP, we construct an oracle that serves an access, in constant time, to a nearly optimal solution of a basic LP relaxation of the CSP. (ii) Using the oracle, we present a constant-time rounding scheme that achieves an approximation ratio coincident with the integrality gap of the basic LP. (iii) We give a generic conversion from integrality gaps of basic LPs to hardness results. All of those results are ``unconditional.'' Therefore, for every bounded-degree CSP, we give the best constant-time approximation algorithm among all.

Yoshida, Yuichi

2010-01-01T23:59:59.000Z

259

Longwave 3D Benchmarks for Inhomogeneous Clouds and Comparisons with Approximate Methods  

Science Conference Proceedings (OSTI)

The purpose of this study is twofold: to (i) establish three-dimensional (3D) longwave radiative transfer benchmarks for inhomogeneous cloud fields and (ii) compare the results with three approximate, 1D methods. The benchmark results are ...

George P. Kablick III; Robert G. Ellingson; Ezra E. Takara; Jlujing Gu

2011-04-01T23:59:59.000Z

260

Approximation fixpoint theory and the semantics of logic and answers set programs  

Science Conference Proceedings (OSTI)

Approximation Fixpoint Theory was developed as a fixpoint theory of lattice operators that provides a uniform formalization of four main semantics of three major nonmonotonic reasoning formalisms. This paper clarifies how this fixpoint theory can define ...

Marc Denecker; Maurice Bruynooghe; Joost Vennekens

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Bounds and Approximations for Sums of Dependent Log-Elliptical Random Variables  

E-Print Network (OSTI)

Dhaene, Denuit, Goovaerts, Kaas & Vyncke (2002a,b) have studied convex bounds for a sum of dependent random variables and applied these to sums of log-normal random variables. In particular, they have shown how these convex bounds can be used to derive closed-form approximations for several of the risk measures of such a sum. In this paper we investigate to which extent their general results on convex bounds can also be applied to sums of log-elliptical random variables which incorporate sums of log-normals as a special case. Firstly, we show that unlike the log-normal case, for general sums of log-ellipticals the convex lower bound does no longer result in closed form approximations for the different risk measures. Secondly, we demonstrate how instead the weaker stop-loss order can be used to derive such closed form approximations. We also present numerical examples to show the accuracy of the proposed approximations.

unknown authors

2008-01-01T23:59:59.000Z

262

Modified Delta-Eddington Approximation for Solar Reflection, Transmission, and Absorption Calculations  

Science Conference Proceedings (OSTI)

The fractional factor f of ?-function scaling in the ?-Eddington approximation modifies the fractional scattering into the forward peak. As shown in this paper, reasonably choosing the factor f can yield a great improvement of transmission, ...

Jinhuan Qiu

1999-08-01T23:59:59.000Z

263

Analytic Approximation of Discrete Field Samples with Weighted Sums and the Gridless Computation of Field Derivatives  

Science Conference Proceedings (OSTI)

Objective analysis by weighted sums of discrete observations is equivalent to the approximation of the distribution of an observed parameter by a function which is also analytic, provided that the weighting function is both analytic and positive ...

F. Caracena

1987-12-01T23:59:59.000Z

264

Base-state Substitution: An Idealized Modeling Technique for Approximating Environmental Variability  

Science Conference Proceedings (OSTI)

Base-state substitution (BSS) is a novel modeling technique for approximating environmental heterogeneity in idealized simulations. After a certain amount of model run time, base-state substitution replaces the original horizontally homogeneous ...

Casey E. Letkewicz; Adam J. French; Matthew D. Parker

265

Monotone Finite-Difference Approximations to the Advection-Condensation Problem  

Science Conference Proceedings (OSTI)

We discuss herein numerical difficulties with finite-difference approximations to the thermodynamic conservation laws near sharp, cloud-environment interfaces. The Conservation laws for entropy and water substance variables are coupled through ...

Wojciech W. Grabowski; Piotr K. Smolarkiewicz

1990-10-01T23:59:59.000Z

266

Approximate analysis of the temperature induced stresses and deformations of composite shells  

Science Conference Proceedings (OSTI)

In this paper simple formulas are presented which can be used to estimate the response of composite plates and shells to hygrothermal loads. The layup of the shell can be arbitrary (i.e., it can be symmetric or unsymmetric, balanced or unbalanced). The formulas serve two purposes. First, they can be used to calculate directly the stresses, strains, and displacements caused by a temperature and a moisture gradient. Second, the formulas can be used to determine the 'effective' thermal and moisture expansion coefficients which are the parameters needed in more accurate numerical (FEM) calculations. The accuracies of the approximate formulas were assessed by sample problems. In these problems the hygrothermal deformations of cylinders and cylindrical segments were calculated by the present approximate formulas and by an exact, three-dimensional analysis. The results of the exact and approximate methods were compared. These comparisons showed that the approximate formulas yield the deformations with a high degree of accuracy. 18 refs.

Kollar, L.P. (Stanford Univ., Stanford, CA (United States))

1994-01-01T23:59:59.000Z

267

Approximating game-theoretic optimal strategies for full-scale poker  

Science Conference Proceedings (OSTI)

The computation of the first complete approximations of game-theoretic optimal strategies for full-scale poker is addressed. Several abstraction techniques are combined to represent the game of 2-player Texas Hold'em, having size O(1018), ...

D. Billings; N. Burch; A. Davidson; R. Holte; J. Schaeffer; T. Schauenberg; D. Szafron

2003-08-01T23:59:59.000Z

268

A Comparison of Ekman Pumping in Approximate Models of the Accelerating Planetary Boundary Layer  

Science Conference Proceedings (OSTI)

Several theories of the planetary boundary layer that retain the flow accelerations in approximate form are compared. Two special test cases focus on the role of either local or convective accelerations. The semigeotriptic theory of Cullen ...

Peter R. Bannon

1998-04-01T23:59:59.000Z

269

Base-State Substitution: An Idealized Modeling Technique for Approximating Environmental Variability  

Science Conference Proceedings (OSTI)

Base-state substitution (BSS) is a novel modeling technique for approximating environmental heterogeneity in idealized simulations. After a certain amount of model run time, base-state substitution replaces the original horizontally homogeneous ...

Casey E. Letkewicz; Adam J. French; Matthew D. Parker

2013-09-01T23:59:59.000Z

270

Four-Stream Spherical Harmonic Expansion Approximation for Solar Radiative Transfer  

Science Conference Proceedings (OSTI)

This paper presents a four-stream extension of the ?-Eddington approximation by considering the higher-order spherical harmonic expansion in radiative intensity. By using the orthogonality relation of the spherical harmonic functions, the ...

J. Li; V. Ramaswamy

1996-04-01T23:59:59.000Z

271

Effects of the Boussinesq Approximation on the Results of Strongly-Buoyant Plume Calculations  

Science Conference Proceedings (OSTI)

Nearly all mathematical models which are commonly used to predict the dispersion of chimney gases in the atmosphere or heated water discharges in the aquatic environment employ the so-called Boussinesq approximation. It is part of this ...

M. Schatzmann; A. J. Policastro

1984-01-01T23:59:59.000Z

272

A Coupled AtmosphereOcean Radiative Transfer System Using the Analytic Four-Stream Approximation  

Science Conference Proceedings (OSTI)

A coupled atmosphereocean radiative transfer model based on the analytic four-stream approximation has been developed. It is shown that this radiation model is computationally efficient and at the same time can achieve acceptable accuracy for ...

Wei-Liang Lee; K. N. Liou

2007-10-01T23:59:59.000Z

273

An Approximation to Multiple Scattering in the Earth's Atmosphere: Almucantar Radiance Formulation  

Science Conference Proceedings (OSTI)

The retrieval of aerosol size distributions from solar aureole measurements, in the past, have been made tractable by assuming the single-scattering approximation, since the inclusion of multiple scattering by solving the complete radiative ...

M. A. Box; A. Deepak

1981-05-01T23:59:59.000Z

274

Table A6. Approximate Heat Rates for Electricity, and Heat Content ...  

U.S. Energy Information Administration (EIA)

Total Fossil Fuels 6,7: ... 7 The fossil-fuels heat rate is used as the thermal conversion factor for ... approximate the quantity of fossil fuels replaced by these ...

275

A Simple Model of a Convectively Coupled Walker Circulation Using the Weak Temperature Gradient Approximation  

Science Conference Proceedings (OSTI)

An idealized model of a Walker circulation based on the weak temperature gradient (WTG) approximation and a single baroclinic vertical mode for all fields is analyzed. The circulation is forced by a sinusoidal variation of sea surface temperature ...

Christopher S. Bretherton; Adam H. Sobel

2002-10-01T23:59:59.000Z

276

A New Approximate Solution of the Optimal Nonlinear Filter for Data Assimilation in Meteorology and Oceanography  

Science Conference Proceedings (OSTI)

This paper introduces a new approximate solution of the optimal nonlinear filter suitable for nonlinear oceanic and atmospheric data assimilation problems. The method is based on a local linearization in a low-rank kernel representation of the ...

I. Hoteit; D-T. Pham; G. Triantafyllou; G. Korres

2008-01-01T23:59:59.000Z

277

Medial Spheres for Shape Approximation Svetlana Stolpner, Paul Kry, Kaleem Siddiqi  

E-Print Network (OSTI)

distance tests than the state-of-the-art method for sphere set approximation for the class of (, )-fat-of-detail rendering [4], shape matching [5], and shape deformation [6]. In the above applications, it is desirable

Dudek, Gregory

278

Approximate consensus in the dynamic stochastic network with incomplete information and measurement delays  

Science Conference Proceedings (OSTI)

Consideration was given to the problem of achieving an approximate consensus in the decentralized stochastic dynamic network under incomplete information about the current states of the nodes, measurement delay, and variable structure of links. Solution ...

N. O. Amelina; A. L. Fradkov

2012-11-01T23:59:59.000Z

279

EA-1915: Conveyance of Approximately 1,641 Acres of Unimproved Land to the  

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

5: Conveyance of Approximately 1,641 Acres of Unimproved Land 5: Conveyance of Approximately 1,641 Acres of Unimproved Land to the Tri-City Development Council, the Local Community Reuse Organization, Richland, WA EA-1915: Conveyance of Approximately 1,641 Acres of Unimproved Land to the Tri-City Development Council, the Local Community Reuse Organization, Richland, WA Summary This EA will evaluate the environmental impacts of conveyance of approximately 1,641 acres of unimproved land at DOE's Hanford Site, Richland, Washington to the Tri-City Development Council, the local community reuse organization. Public Comment Opportunities None available at this time. Documents Available for Download September 19, 2012 EA-1915: Notice of Intent to Prepare an Environmental Assessment and Notice of Potential Floodplain and Wetland Involvement

280

Few body impulse and fixed scatterer approximations for high energy scattering  

E-Print Network (OSTI)

The elastic scattering differential cross section is calculated for proton scattering from $^6$He at 717 MeV, using single scattering terms of the multiple scattering expansion of the total transition amplitude (MST). We analyse the effects of different scattering frameworks, specifically the Factorized Impulse Approximation (FIA) and the Fixed Scatterer (adiabatic) Approximation (FSA) and the uncertainties associated with the use different structure models.

R. Crespo; A. M. Moro; I. J. Thompson

2006-03-02T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Estimating the Bias of Local Polynomial Approximations Using the Peano Kernel  

SciTech Connect

These presentation visuals define local polynomial approximations, give formulas for bias and random components of the error, and express bias error in terms of the Peano kernel. They further derive constants that give figures of merit, and show the figures of merit for 3 common weighting functions. The Peano kernel theorem yields estimates for the bias error for local-polynomial-approximation smoothing that are superior in several ways to the error estimates in the current literature.

Blair, J., and Machorro, E.

2012-03-22T23:59:59.000Z

282

Development of iteration strategies for a practical implementation of a higher order transverse leakage approximation  

Science Conference Proceedings (OSTI)

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)

Prinsloo, R. H.; Tomasevic, D. I. [Necsa, PO Box 582, Pretoria, 0001 (South Africa)

2012-07-01T23:59:59.000Z

283

Exact and approximate solutions for the quantum minimum-Kullback-entropy estimation problem  

E-Print Network (OSTI)

The minimum Kullback entropy principle (mKE) is a useful tool to estimate quantum states and operations from incomplete data and prior information. In general, the solution of a mKE problem is analytically challenging and an approximate solution has been proposed and employed in different context. Recently, the form and a way to compute the exact solution for finite dimensional systems has been found, and a question naturally arises on whether the approximate solution could be an effective substitute for the exact solution, and in which regimes this substitution can be performed. Here, we provide a systematic comparison between the exact and the approximate mKE solutions for a qubit system when average data from a single observable are available. We address both mKE estimation of states and weak Hamiltonians, and compare the two solutions in terms of state fidelity and operator distance. We find that the approximate solution is generally close to the exact one unless the initial state is near an eigenstate of the measured observable. Our results provide a rigorous justification for the use of the approximate solution whenever the above condition does not occur, and extend its range of application beyond those situations satisfying the assumptions used for its derivation.

Carlo Sparaciari; Stefano Olivares; Francesco Ticozzi; Matteo G. A. Paris

2013-11-23T23:59:59.000Z

284

Noise kernel for a quantum field in Schwarzschild spacetime under the Gaussian approximation  

E-Print Network (OSTI)

A method is given to compute an approximation to the noise kernel, defined as the symmetrized connected 2-point function of the stress tensor, for the conformally invariant scalar field in any spacetime conformal to an ultra-static spacetime for the case in which the field is in a thermal state at an arbitrary temperature. The most useful applications of the method are flat space where the approximation is exact and Schwarzschild spacetime where the approximation is better than it is in most other spacetimes. The two points are assumed to be separated in a timelike or spacelike direction. The method involves the use of a Gaussian approximation which is of the same type as that used by Page to compute an approximate form of the stress tensor for this field in Schwarzschild spacetime. All components of the noise kernel have been computed exactly for hot flat space and one component is explicitly displayed. Several components have also been computed for Schwarzschild spacetime and again one component is explicitly displayed.

A. Eftekharzadeh; Jason D. Bates; Albert Roura; Paul R. Anderson; B. L. Hu

2010-11-22T23:59:59.000Z

285

Tests of Monte Carlo Independent Column Approximation in the ECHAM5  

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

Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Tests of Monte Carlo Independent Column Approximation in the ECHAM5 Atmospheric GCM Raisanen, Petri Finnish Meteoroligical Institute Jarvenoja, Simo Finnish Meteorological Institute Jarvinen, Heikki Finnish Meteorological Institute Category: Modeling The Monte Carlo Independent Column Approximation (McICA) was recently introduced as a new approach for parametrizing broadband radiative fluxes in global climate models (GCMs). The McICA allows a flexible description of unresolved cloud structure, and it is unbiased with respect to the full ICA, but its results contain conditional random errors (i.e., noise). In this work, McICA and a stochastic cloud generator have been implemented to the Max Planck Institute for Meteorology's ECHAM5 atmospheric GCM. The

286

The Complexity of Approximating Bounded-Degree Boolean #CSP (Extended Abstract)  

E-Print Network (OSTI)

The degree of a CSP instance is the maximum number of times that a variable may appear in the scope of constraints. We consider the approximate counting problem for Boolean CSPs with bounded-degree instances, for constraint languages containing the two unary constant relations {0} and {1}. When the maximum degree is at least 25 we obtain a complete classification of the complexity of this problem. It is exactly solvable in polynomial-time if every relation in the constraint language is affine. It is equivalent to the problem of approximately counting independent sets in bipartite graphs if every relation can be expressed as conjunctions of {0}, {1} and binary implication. Otherwise, there is no FPRAS unless NP=RP. For lower degree bounds, additional cases arise in which the complexity is related to the complexity of approximately counting independent sets in hypergraphs.

Dyer, Martin E; Jalsenius, Markus; Richerby, David

2010-01-01T23:59:59.000Z

287

Controlled Nonlinear Stochastic Delay Equations: Part II: Approximations and Pipe-Flow Representations  

SciTech Connect

This is the second part of a work dealing with key issues that have not been addressed in the modeling and numerical optimization of nonlinear stochastic delay systems. We consider new classes of models, such as those with nonlinear functions of several controls (such as products), each with is own delay, controlled random Poisson measure driving terms, admissions control with delayed retrials, and others. Part I was concerned with issues concerning the class of admissible controls and their approximations, since the classical definitions are inadequate for our models. This part is concerned with transportation equation representations and their approximations. Such representations of nonlinear stochastic delay models have been crucial in the development of numerical algorithms with much reduced memory and computational requirements. The representations for the new models are not obvious and are developed. They also provide a template for the adaptation of the Markov chain approximation numerical methods.

Kushner, Harold J., E-mail: hjk@dam.brown.edu [Brown University, Applied Math (United States)

2012-08-15T23:59:59.000Z

288

DOE Seeks to Invest Approximately $1.3 Billion to Commercialize CCS  

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

to Invest Approximately $1.3 Billion to Commercialize CCS to Invest Approximately $1.3 Billion to Commercialize CCS Technology DOE Seeks to Invest Approximately $1.3 Billion to Commercialize CCS Technology June 24, 2008 - 2:15pm Addthis Funding Opportunity Announcement Solicits Applications for Restructured FutureGen Program WASHINGTON, DC - The U.S. Department of Energy (DOE) today issued a Funding Opportunity Announcement (FOA) to invest in multiple commercial-scale Integrated Gasification Combined Cycle (IGCC) or other clean coal power plants with cutting-edge carbon capture and storage (CCS) technology under the Department's restructured FutureGen program. The solicitation is seeking multiple cost-shared projects to advance coal-based power generation technologies that capture and store the greenhouse gas carbon

289

Stabilizing control of parallel AC-DC power transmission systems by approximate switching curve  

SciTech Connect

A method to improve the transient stability of bulk power transmission system is presented. The method stabilizes the control of parallel ac-dc transmission systems using an approximate switching curve. The optimal switching curve is approximated by a power series and the resulting switching curve is determined independent of type and duration of faults that occur to the system. In addition, coefficients of the switching curve can be calculated on a off-line basis which allows use of simple on-line algebraic calculations in emergency conditions.

Ichiyanagi, K.; Kobayashi, H.; Kakehu, H.

1980-01-01T23:59:59.000Z

290

Scalar O(N) Model at Finite Temperature -- 2PI Effective Potential in Different Approximations  

E-Print Network (OSTI)

We calculate the two-particle irreducible (2PI) effective potential of the O(N) linear sigma model in 1+1 dimensions. The approximations we use are the next-to-leading order of a 1/N expansion (for arbitrary N) and a kind of "resummed loop approximation" for N=1. We show that the effective potential of the 1/N expansion is convex for N=4 and N=10 whereas it is not for the "loop" expansion and the case N=1 of the 1/N expansion.

Jurgen Baacke; Stefan Michalski

2004-09-14T23:59:59.000Z

291

Buffer sizing for minimum energy-delay product by using an approximating polynomial  

Science Conference Proceedings (OSTI)

This paper first presents an accurate and efficient method of estimating the short circuit energy dissipation and the output transition time of CMOS buffers. Next, the paper describes a sizing method for tapered buffer chains. It is shown that the first-order ... Keywords: buffer sizing, polynomial approximation, short circuit energy

Chang Woo Kang; Soroush Abbaspour; Massoud Pedram

2003-04-01T23:59:59.000Z

292

Use of symbolic and numeric methods in an algorithm for the approximation of multivariate functions  

Science Conference Proceedings (OSTI)

In this paper, we discuss aspects of a particular algorithm, namely that of finding an approximation to a real function of n variables, that uses both symbolic and numeric manipulations. Development of this algorithm was motivated in part by an actual ...

David K. Kahaner; Mark B. Wells

1976-08-01T23:59:59.000Z

293

Approximate k-NN delta test minimization method using genetic algorithms: Application to time series  

Science Conference Proceedings (OSTI)

In many real world problems, the existence of irrelevant input variables (features) hinders the predictive quality of the models used to estimate the output variables. In particular, time series prediction often involves building large regressors of ... Keywords: Approximate k-nearest neighbors, Delta test, Genetic algorithm, Time series, Variable projection, Variable scaling, Variable selection

Fernando Mateo; Duan Sovilj; Rafael Gadea

2010-06-01T23:59:59.000Z

294

The estimates of approximation by using a new type of weighted modulus of continuity  

Science Conference Proceedings (OSTI)

In this paper, we introduce a new type modulus of continuity for function f belonging to a particular weighted subspace of C[0,~) and show that it has some properties of ordinary modulus of continuity. We obtain some estimates of approximation of functions ... Keywords: Beurling classes, Modulus of continuity, Positive linear operators, Weighted spaces

A. D. Gadjiev; A. Aral

2007-07-01T23:59:59.000Z

295

Physics 116C Fall 2012 The Normal Approximation to the Binomial Distribution  

E-Print Network (OSTI)

Physics 116C Fall 2012 The Normal Approximation to the Binomial Distribution 1. Properties of the binomial distribution Consider a the binomial distribution, f(x) = C(n, x)px qn-x , where C(n, x) n! x of the binomial distribution can be computed using the follow- ing trick. Consider the binomial expansion (p + q

California at Santa Cruz, University of

296

Physics 116C Fall 2012 The Normal Approximation to the Binomial Distribution  

E-Print Network (OSTI)

Physics 116C Fall 2012 The Normal Approximation to the Binomial Distribution 1. Properties of the binomial distribution Consider a the binomial distribution, f(x) = C(n, x)p x q n-x , where C(n, x) # n! x. The expectation value of the binomial distribution can be computed using the follow­ ing trick. Consider

California at Santa Cruz, University of

297

Approximate forward-backward algorithm for a switching linear Gaussian model  

Science Conference Proceedings (OSTI)

A hidden Markov model with two hidden layers is considered. The bottom layer is a Markov chain and given this the variables in the second hidden layer are assumed conditionally independent and Gaussian distributed. The observation process is Gaussian ... Keywords: Approximation, Forward-backward algorithm, Hidden Markov model, Metropolis-Hastings algorithm, Seismic inversion

Hugo Hammer; Hkon Tjelmeland

2011-01-01T23:59:59.000Z

298

Two approximations of the present value distribution of a disability annuity  

Science Conference Proceedings (OSTI)

The distribution function of the present value of a cash flow can be approximated by means of a distribution function of a random variable, which is also the present value of a sequence of payments, but with a simpler structure. The corresponding random ... Keywords: Comonotonic joint distribution, Convex order, Multistate life insurance contracts, Present value distributions

Jaap Spreeuw

2006-02-01T23:59:59.000Z

299

Two approximations of the present value distribution of a disability annuity  

Science Conference Proceedings (OSTI)

The distribution function of the present value of a cash flow can be approximated by means of a distribution function of a random variable, which is also the present value of a sequence of payments, but with a simpler structure. The corresponding random ... Keywords: comonotonic joint distribution, convex order, multistate life insurance contracts, present value distributions

Jaap Spreeuw

2006-02-01T23:59:59.000Z

300

Optimal Policies and Approximations for a Bayesian Linear Regression Inventory Model  

Science Conference Proceedings (OSTI)

In this paper, we consider a periodic review inventory problem where demand in each period is modeled by linear regression. We use a Bayesian formulation to update the regression parameters as new information becomes available. We find that a state-dependent ... Keywords: Bayesian regression, approximations heuristics, inventory production, stochastic models

Katy S. Azoury; Julia Miyaoka

2009-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Programs in Mathematica relevant to Phase Integral Approximation for coupled ODEs of the Schrdinger type  

E-Print Network (OSTI)

Three programs in Mathematica are presented, which produce expressions for the lowest order and the higher order corrections of the Phase Integral Approximation. First program is pertinent to one ordinary differential equation of the Schr\\"odinger type. The remaining two refer to a set of two such equations.

Andrzej A. Skorupski

2007-10-29T23:59:59.000Z

302

Algorithm for stochastic approximation with trial input perturbation in the nonstationary problem of optimization  

Science Conference Proceedings (OSTI)

Consideration was given to the randomized stochastic approximation algorithm with simultaneous trial input perturbation and two measurements used to optimize the unconstrained nonstationary functional. The upper boundary of the mean-square residual was ... Keywords: 02.50.Sk, 02.60.Pn

A. T. Vakhitov; O. N. Granichin; L. S. Gurevich

2009-11-01T23:59:59.000Z

303

Tensor Product Approximation (DMRG) and Coupled Cluster method in Quantum Chemistry  

E-Print Network (OSTI)

We present the Copupled Cluster (CC) method and the Density matrix Renormalization Grooup (DMRG) method in a unified way, from the perspective of recent developments in tensor product approximation. We present an introduction into recently developed hierarchical tensor representations, in particular tensor trains which are matrix product states in physics language. The discrete equations of full CI approximation applied to the electronic Schr\\"odinger equation is casted into a tensorial framework in form of the second quantization. A further approximation is performed afterwards by tensor approximation within a hierarchical format or equivalently a tree tensor network. We establish the (differential) geometry of low rank hierarchical tensors and apply the Driac Frenkel principle to reduce the original high-dimensional problem to low dimensions. The DMRG algorithm is established as an optimization method in this format with alternating directional search. We briefly introduce the CC method and refer to our theoretical results. We compare this approach in the present discrete formulation with the CC method and its underlying exponential parametrization.

rs Legeza; Thorsten Rohwedder; Reinhold Schneider; Szilrd Szalay

2013-10-10T23:59:59.000Z

304

A O(1/?2)n-time sieving algorithm for approximate integer programming  

Science Conference Proceedings (OSTI)

The Integer Programming Problem (IP) for a polytope P??n is to find an integer point in P or decide that P is integer free. We give a randomized algorithm for an approximate version of this problem, ... Keywords: closest vector problem, integer programming, shortest vector problem

Daniel Dadush

2012-04-01T23:59:59.000Z

305

Approximate Equations of Motion for Compact Spinning Bodies in General Relativity  

E-Print Network (OSTI)

Approximate equations are derived for the motion of a gyroscope on the earth's gravitational field using the Einstein, Infeld, Hoffmann surface integral method. This method does not require a knowledge of the energy-momentum-stress tensor associated with the gyroscope and uses only its exterior field for its characterization. The resulting equations of motion differ from those of previous derivations.

James L. Anderson

2005-11-16T23:59:59.000Z

306

Approximation and error estimation in high dimensional space for stochastic collocation methods on arbitrary sparse samples  

Science Conference Proceedings (OSTI)

We have develop a fast method that can capture piecewise smooth functions in high dimensions with high order and low computational cost. This method can be used for both approximation and error estimation of stochastic simulations where the computations can either be guided or come from a legacy database.

Archibald, Richard K [ORNL; Deiterding, Ralf [ORNL; Hauck, Cory D [ORNL; Jakeman, John D [ORNL; Xiu, Dongbin [ORNL

2012-01-01T23:59:59.000Z

307

Approximate posterior distributions for convolutional two-level hidden Markov models  

Science Conference Proceedings (OSTI)

A convolutional two-level hidden Markov model is defined and evaluated. The bottom level contains an unobserved categorical Markov chain, and given the variables in this level the middle level contains unobserved conditionally independent Gaussian variables. ... Keywords: Approximation, Convolution, Forward-backward algorithm, Hidden Markov model, Seismic inversion

Kjartan Rimstad; Henning Omre

2013-02-01T23:59:59.000Z

308

Approximation algorithm for minimal convergecast time problem in wireless sensor networks  

Science Conference Proceedings (OSTI)

In this paper we consider how to collect data from sensors deployed in the Euclidean plane in a time-efficient way. We assume that all sensors could adjust their transmission ranges and aggregate data received from other sensors. We adopt a collision-free ... Keywords: Approximation algorithm, Convergecast, Latency, Wireless sensor networks

Weiping Shang; Pengjun Wan; Xiaodong Hu

2010-07-01T23:59:59.000Z

309

Approximation of optimal moving paths of huge robot reclaimer with a 3d range finder  

Science Conference Proceedings (OSTI)

This paper proposes a simple method for approximating the optimal moving paths of a huge robot reclaimer located in the outdoor material stock yard with emphasis on safety, energy consumption, and transfer time. The reclaimer is equipped with a 3D range ...

Kwan-Hee Lee; Hyo-Jung Bae; Sung-Je Hong

2006-05-01T23:59:59.000Z

310

An approximate algorithm for the flux from a rectangular volume source  

SciTech Connect

An exact semi-analytic formula for the flux from a rectangular surface source with a slab shield has been derived and the required function table has been calculated. This formula is the basis for an algorithm which gives a good approximation for the flux from a rectangular volume source. No other hand calculation method for this source geometry is available in the literature.

Wallace, O.J.

1994-11-09T23:59:59.000Z

311

A two-phase approximation for model checking probabilistic unbounded until properties of probabilistic systems  

Science Conference Proceedings (OSTI)

We have developed a new approximate probabilistic model-checking method for untimed properties in probabilistic systems, expressed in a probabilistic temporal logic (PCTL, CSL). This method, in contrast to the existing ones, does not require the ... Keywords: CSL, CTMC, DTMC, PCTL

Paul Jennings; Arka P. Ghosh; Samik Basu

2012-06-01T23:59:59.000Z

312

On the applicability of the minimal configured hierarchical fuzzy control and its relevance to function approximation  

Science Conference Proceedings (OSTI)

This paper presents an approach to minimal hierarchical fuzzy control systems design. It maintains the idea of distributing behaviors inside a fuzzy structure, while the minimal hierarchical fuzzy control is an effective procedure for dealing with systems ... Keywords: ANFIS, Behavioral decomposition, Control, Design, FIS, FLU, Function approximation, Hierarchical fuzzy systems, MCANHFLS, Methodology, RMSE, TSK

Taher M. Jelleli; Adel M. Alimi

2009-09-01T23:59:59.000Z

313

On the Approximation of the Coriolis Terms in C-Grid Models  

Science Conference Proceedings (OSTI)

A new representation of the Coriolis terms on the Arakawa C grid is proposed. The approximation dumps the grid-scale noise that arises because of spatial averaging of the Coriolis terms when the grid spacing is larger than the deformation radius. ...

Dmitri Nechaev; Max Yaremchuk

2004-09-01T23:59:59.000Z

314

Entanglement in GaAs and CdSe quantum dots: Exact calculations and DFT approximations  

Science Conference Proceedings (OSTI)

We consider two electrons confined in spherical GaAs and CdSe quantum dots and calculate their ground-state spatial entanglement exactly within a parabolic confinement model. We propose a perturbative scheme to approximate the above entanglement within ... Keywords: Density-functional theory, Entanglement, Quantum dots, Quantum information, Semiconductors

J. P. Coe; A. Sudbery; I. D'Amico

2009-03-01T23:59:59.000Z

315

An Approximate Dynamic Programming Algorithm for Large-Scale Fleet Management: A Case Application  

Science Conference Proceedings (OSTI)

We addressed the problem of developing a model to simulate at a high level of detail the movements of over 6,000 drivers for Schneider National, the largest truckload motor carrier in the United States. The goal of the model was not to obtain a better ... Keywords: approximate dynamic programming, driver management, fleet management, truckload trucking

Hugo P. Simo; Jeff Day; Abraham P. George; Ted Gifford; John Nienow; Warren B. Powell

2009-05-01T23:59:59.000Z

316

Preprint of the paper: "Stability analysis of BEM approximate solutions in grounding analysis"  

E-Print Network (OSTI)

the grounding grid its main element. In general, most of grounding grids of electrical substations consist thrusted ground rods in certain places of the substation site. The most important parametersPreprint of the paper: "Stability analysis of BEM approximate solutions in grounding analysis" J

Colominas, Ignasi

317

Pseudo-Linear Approximations for ARX Ciphers With Application to Threefish  

E-Print Network (OSTI)

Kay and Poorvi L. Vora The George Washington University, Washington DC 20052, USA kerry@gwu.edu and poorvi examine a window (grouping of contiguous bits) of size w for w observations. First, addition modulo 2n on the window can be approximated by addition modulo 2w . Second

International Association for Cryptologic Research (IACR)

318

Approximation Algorithms for Deadline-TSP and Vehicle Routing with Time-Windows  

E-Print Network (OSTI)

Approximation Algorithms for Deadline-TSP and Vehicle Routing with Time-Windows Nikhil Bansal by their deadlines. We also consider the more general Vehicle Routing with Time- Windows problem, in which each node their "time-windows" [R(v), D(v)]. No good ap- proximations were known previously for these problems

Sheridan, Jennifer

319

A New 2D-Transport, 1D-Diffusion Approximation of the Boltzmann Transport equation  

Science Conference Proceedings (OSTI)

The work performed in this project consisted of the derivation, implementation, and testing of a new, computationally advantageous approximation to the 3D Boltz- mann transport equation. The solution of the Boltzmann equation is the neutron flux in nuclear reactor cores and shields, but solving this equation is difficult and costly. The new 2D/1D approximation takes advantage of a special geometric feature of typical 3D reactors to approximate the neutron transport physics in a specific (ax- ial) direction, but not in the other two (radial) directions. The resulting equation is much less expensive to solve computationally, and its solutions are expected to be sufficiently accurate for many practical problems. In this project we formulated the new equation, discretized it using standard methods, developed a stable itera- tion scheme for solving the equation, implemented the new numerical scheme in the MPACT code, and tested the method on several realistic problems. All the hoped- for features of this new approximation were seen. For large, difficult problems, the resulting 2D/1D solution is highly accurate, and is calculated about 100 times faster than a 3D discrete ordinates simulation.

Larsen, Edward

2013-06-17T23:59:59.000Z

320

An approximate two-dimensional Riemann solver for hyperbolic systems of conservation laws  

Science Conference Proceedings (OSTI)

A two-dimensional Riemann solver is proposed for the solution of hyperbolic systems of conservation laws in two dimensions of space. The solver approximates the solution of a so-called angular two-dimensional Riemann problem as the weighted sum of the ... Keywords: Conservation laws, Godunov-type schemes, Riemann solver, Shallow-water equations, Shock waves, Source term discretization

Vincent Guinot

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Definition of Systematic, Approximately Separable and Modular Internal Coordinates (SASMIC) for macromolecular simulation  

E-Print Network (OSTI)

A set of rules is defined to systematically number the groups and the atoms of organic molecules and, particularly, of polypeptides in a modular manner. Supported by this numeration, a set of internal coordinates is defined. These coordinates (termed Systematic, Approximately Separable and Modular Internal Coordinates, SASMIC) are straightforwardly written in Z-matrix form and may be directly implemented in typical Quantum Chemistry packages. A number of Perl scripts that automatically generate the Z-matrix files for polypeptides are provided as supplementary material. The main difference with other Z-matrix-like coordinates normally used in the literature is that normal dihedral angles (``principal dihedrals'' in this work) are only used to fix the orientation of whole groups and a somewhat non-standard type of dihedrals, termed ``phase dihedrals'', are used to describe the covalent structure inside the groups. This physical approach allows to approximately separate soft and hard movements of the molecule using only topological information and to directly implement constraints. As an application, we use the coordinates defined and ab initio quantum mechanical calculations to assess the commonly assumed approximation of the free energy, obtained from ``integrating out'' the side chain degree of freedom chi, by the Potential Energy Surface (PES) in the protected dipeptide HCO-L-Ala-NH2. We also present a sub-box of the Hessian matrix in two different sets of coordinates to illustrate the approximate separation of soft and hard movements when the coordinates defined in this work are used.

Pablo Echenique; J. L. Alonso

2005-11-03T23:59:59.000Z

322

Approximate eigensolutions of the deformed Woods-Saxon potential via AIM  

E-Print Network (OSTI)

By using the Pekeris approximation, the Schr\\"{o}dinger equation is solved for the nuclear deformed Woods-Saxon potential within the framework of the asymptotic iteration method (AIM). The energy levels are worked out and the corresponding normalized eigenfunctions are obtained in terms of hypergeometric function.

Sameer M. Ikhdair; Babatunde James Falaye; Majid Hamzavi

2013-07-31T23:59:59.000Z

323

On the angular defect of triangulations and the pointwise approximation of curvatures  

Science Conference Proceedings (OSTI)

Let S be a smooth surface of E3, p a point on S, km, kM, kG and kH the maximum, minimum, Gauss and mean curvatures of S at p. Consider a set {pippi+1}i ... Keywords: approximations, curvatures, differential geometry, meshes, smooth surfaces

V. Borrelli; F. Cazals; J.-M. Morvan

2003-09-01T23:59:59.000Z

324

tribution and abundance. In analysis of survey data, these results are a first approximation of correction  

E-Print Network (OSTI)

variables affecting aerial surveys, but the effects of glare on shipboard surveys and observer variabilitytribution and abundance. In analysis of survey data, these results are a first approximation conditions or animal behavior. Further work on survey methodology should examine the effect of eye height

325

FilMINT: An Outer Approximation-Based Solver for Convex Mixed-Integer Nonlinear Programs  

Science Conference Proceedings (OSTI)

We describe a new solver for convex mixed-integer nonlinear programs (MINLPs) that implements a linearization-based algorithm. The solver is based on an algorithm of Quesada and Grossmann [Quesada, I., I. E. Grossmann. 1992. An LP/NLP based branch-and-bound ... Keywords: LP/NLP-based branch and bound, mixed-integer nonlinear programming, outer approximation

Kumar Abhishek; Sven Leyffer; Jeff Linderoth

2010-10-01T23:59:59.000Z

326

Optimal approximation of linear systems using Taguchi-sliding-based differential evolution algorithm  

Science Conference Proceedings (OSTI)

A Taguchi-sliding-based differential evolution algorithm (TSBDEA) is proposed in this study to solve the problem of optimally approximating linear systems. The TSBDEA is an approach of combining the differential evolution algorithm (DEA) with the Taguchi-sliding-level-method ... Keywords: Differential evolution algorithm, Model reduction, Taguchi sliding level method

Jinn-Tsong Tsai; Wen-Hsien Ho; Jyh-Horng Chou; Ching-Yi Guo

2011-03-01T23:59:59.000Z

327

Tests of Monte Carlo Independent Column Approximation With a Mixed-Layer Ocean Model  

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

Tests of Monte Carlo Independent Column Tests of Monte Carlo Independent Column Approximation With a Mixed-Layer Ocean Model Petri Simo Järvenoja Heikki Järvinen Räisänen Finnish Meteorological Institute Figure 1. Root-mean-square sampling errors in local instant- aneous total (LW+SW) net flux at the surface and total radiative heating rate for the 1COL, CLDS, and REF approaches. Global rms values are given at the upper right hand corner of the plots. 1. Introduction The Monte Carlo Independent Column Approximation (McICA) separates the description of unresolved cloud structure from the radiative transfer solver very flexible ! unbiased with respect to ICA ! However, the radiative fluxes and heating rates contain conditional random errors ("McICA noise"). ? The topic of this poster: All previous tests of McICA

328

Low-frequency plasma conductivity in the average-atom approximation  

E-Print Network (OSTI)

Low-frequency properties of a plasma are examined within the average-atom approximation, which presumes that scattering of a conducting electron on each atom takes place independently of other atoms. The relaxation time tau distinguishes a high-frequency region omega tau > 1, where the single-atom approximation is applicable explicitly, from extreme low frequencies omega tau 1, reproducing the Ziman formula in the static limit, results based on the Kubo-Greenwood formula for high frequencies, and satisfying the conductivity sum-rule precisely. The correspondence between physical processes leading to the conventional Ohm's law and the infrared properties of QED is discussed. The suggested average-atom approach to frequency-dependent conductivity is illustrated by numerical calculations for the an aluminum plasma in the temperature range 2--10 eV.

Kuchiev, M Yu

2008-01-01T23:59:59.000Z

329

B-Spline Surface Approximation to Cross-Sections Using Distance Maps  

E-Print Network (OSTI)

this paper, we present a method of surface approximation to cross-sections with multiple branching problems. In this method, we first decompose each multiple branching problem into a set of single branching problems by providing a set of intermediate contours using distance maps. For each single branching region, a procedure then performs the skinning of contour curves represented by cubic B-spline curves on a common knot vector, each of which is fitted to its contour points within a given accuracy. In order to acquire a more compact representation for the surface, the method includes an algorithm for reducing the number of knots in the common knot vector. The approximation surface to the crosssections is represented by a set of bicubic B-spline surfaces. This method provides a smooth surface model, yet realises efficient data reduction.

J. Jeong; K. Kim; H. Park; H. Cho; M. Jung

1999-01-01T23:59:59.000Z

330

LinguisticBelief: a java application for linguistic evaluation using belief, fuzzy sets, and approximate reasoning.  

Science Conference Proceedings (OSTI)

LinguisticBelief is a Java computer code that evaluates combinations of linguistic variables using an approximate reasoning rule base. Each variable is comprised of fuzzy sets, and a rule base describes the reasoning on combinations of variables fuzzy sets. Uncertainty is considered and propagated through the rule base using the belief/plausibility measure. The mathematics of fuzzy sets, approximate reasoning, and belief/ plausibility are complex. Without an automated tool, this complexity precludes their application to all but the simplest of problems. LinguisticBelief automates the use of these techniques, allowing complex problems to be evaluated easily. LinguisticBelief can be used free of charge on any Windows XP machine. This report documents the use and structure of the LinguisticBelief code, and the deployment package for installation client machines.

Darby, John L.

2007-03-01T23:59:59.000Z

331

Coupled-cluster method: A lattice-path-based subsystem approximation scheme for quantum lattice models  

Science Conference Proceedings (OSTI)

An approximation hierarchy, called the lattice-path-based subsystem (LPSUBm) approximation scheme, is described for the coupled-cluster method (CCM). It is applicable to systems defined on a regular spatial lattice. We then apply it to two well-studied prototypical (spin-(1/2) Heisenberg antiferromagnetic) spin-lattice models, namely, the XXZ and the XY models on the square lattice in two dimensions. Results are obtained in each case for the ground-state energy, the ground-state sublattice magnetization, and the quantum critical point. They are all in good agreement with those from such alternative methods as spin-wave theory, series expansions, quantum Monte Carlo methods, and the CCM using the alternative lattice-animal-based subsystem (LSUBm) and the distance-based subsystem (DSUBm) schemes. Each of the three CCM schemes (LSUBm, DSUBm, and LPSUBm) for use with systems defined on a regular spatial lattice is shown to have its own advantages in particular applications.

Bishop, R. F.; Li, P. H. Y. [School of Physics and Astronomy, Schuster Building, University of Manchester, Manchester M13 9PL (United Kingdom)

2011-04-15T23:59:59.000Z

332

Probing the nonlocal approximation to resonant collisions ofelectrons with diatomic molecules  

SciTech Connect

A numerically solvable two-dimensional model introduced bythe authors [Phys. Rev. A 73, 032721 (2006)]is used to investigate thevalidity of the nonlocal approximation to the dynamics of resonantcollisions of electrons with diatomic molecules. The nonlocalapproximation to this model is derived in detail, all underlyingassumptions are specified and explicit expressions for the resonant andnon-resonant (background) T matrix for the studied processes are given.Different choices of the so-called discrete state, which fully determinesthe nonlocal approximation, are discussedand it is shown that a physicalchoice of this state can in general give poorer results than otherchoices that minimize the non-adiabatic effects and/or the backgroundterms of the T matrix. The background contributions to the crosssections, which are usually not considered in the resonant theory ofelectron-molecule collisions, can be significant not only for elasticscattering but also for the inelastic process of vibrationalexcitation.

Houfek, Karel; Rescigno, Thomas N.; McCurdy, C. William

2007-09-07T23:59:59.000Z

333

Two-photon approximation in the theory of electron recombination in hydrogen  

Science Conference Proceedings (OSTI)

A rigorous quantum electrodynamics theory of the multiphoton decay of excited states in a hydrogen atom is presented. The ''two-photon'' approximation is formulated which is limited by the one- and two-photon transitions including cascade transitions with two-photon links. This may be helpful for the strict description of the recombination process in a hydrogen atom and, in principle, for the history of hydrogen recombination in the early universe.

Solovyev, D. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Labzowsky, L. [V. A. Fock Institute of Physics, St. Petersburg State University, Petrodvorets, Oulianovskaya 1, 198504 St. Petersburg (Russian Federation); Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg (Russian Federation)

2010-06-15T23:59:59.000Z

334

Time-dependent Generalized SIC-OEP formalism and Generalized SIC-Slater approximation  

E-Print Network (OSTI)

We propose a simplification of the full "2 sets" Time dependent Self Interaction Correction (TD-SIC) method, applying the Optimized Effective Potential (OEP) method. The new resulting scheme is called time-dependent "Generalized SIC-OEP". A straightforward approximation, using the spatial localization of one set of orbitals, leads to the "Generalized SIC-Slater" formalism. We show that it represents a great improvement compared to the traditional SIC-Slater/KLI formalisms.

Messud, J; Reinhard, P -G; Suraud, E

2009-01-01T23:59:59.000Z

335

Time-dependent Generalized SIC-OEP formalism and Generalized SIC-Slater approximation  

E-Print Network (OSTI)

We propose a simplification of the full "2 sets" Time dependent Self Interaction Correction (TD-SIC) method, applying the Optimized Effective Potential (OEP) method. The new resulting scheme is called time-dependent "Generalized SIC-OEP". A straightforward approximation, using the spatial localization of one set of orbitals, leads to the "Generalized SIC-Slater" formalism. We show that it represents a great improvement compared to the traditional SIC-Slater/KLI formalisms.

J. Messud; P. M. Dinh; P. -G. Reinhard; E. Suraud

2009-08-06T23:59:59.000Z

336

Geophysical imaging method utilizing backpropagation and zeroth-order phase approximation  

DOE Patents (OSTI)

A method is provided for determining, under field conditions and in near-real time, an image of a geophysical objective under the ground in a geophysical medium, utilizing a zeroth order phase approximation implemented with first signal-to-detector arrival times for a plurality of signal transmitters transmitting signals through the geologic medium and the geologic objective to a plurality of signal receivers, disposed adjacent to the geologic objective in a predetermined manner. 9 figs.

Witten, A.J.

1989-09-12T23:59:59.000Z

337

Approximations of the operator exponential in a periodic diffusion problem with drift  

SciTech Connect

A Cauchy problem for a parabolic diffusion equation with 1-periodic coefficients containing first order terms is studied. For the corresponding semigroup we construct approximations in the L{sup 2}-operator norm on sections t=const of order O(t{sup -m/2}) as t{yields}{infinity} for m=1 or m=2. The spectral method based on the Bloch representation of an operator with periodic coefficients is used. Bibliography: 25 titles.

Pastukhova, Svetlana E [Moscow State Institute of Radio-Engineering, Electronics and Automation (Technical University), Moscow (Russian Federation)] [Moscow State Institute of Radio-Engineering, Electronics and Automation (Technical University), Moscow (Russian Federation)

2013-02-28T23:59:59.000Z

338

Approximate analytical solutions for nonlinear Emden-Fowler type equations by differential transform method  

E-Print Network (OSTI)

In this paper, approximate analytical solutions of nonlinear Emden-Fowler type equations are obtained by the differential transform method (DTM). The DTM is a numerical as well as analytical method for solving integral equations, ordinary and partial diferential equations. To show the efficiency of the DTM, some examples are presented. Comparisons with exact solution show that the DTM is a powerful method for the solution of the nonlinear Emden-Fowler type equations.

Birol Ibis

2012-11-15T23:59:59.000Z

339

The development of an approximate dynamic analysis of insulating glass units  

E-Print Network (OSTI)

The goal of this thesis is to develop an approximate dynamic analysis of sealed insulating glass (IG) units subject to uniform blast loads, the formulation of which will be incorporated into a computer program that will be used as a tool to estimate their dynamic response. The formulation of this approximate dynamic analysis of IG units is achieved by modeling the unit with two equivalent single degree of freedom systems consisting of equivalent masses, equivalent structural stiffnesses, equivalent forces, and by incorporating air space compatibility relationships into this model. The equations of motion which define the behavior of this dynamic model are incorporated into a computer program that computes the dynamic response of an IG unit subjected to a prescribed blast loading. This response includes the displacements, velocities, and accelerations of the glass plates of the IG unit. The blast loading will be idealized in order to simplify the analysis. The program will approximate the positive pressure phase of a blast load with an equivalent triangular loading. IG units designed by existing methods will be analyzed using the program, and their performance evaluated. This analysis will not only provide valuable data on the behavior of the IG units to blast loadings, but will lend insight into the acceptability of the existing design approach. The results will also indicate the acceptability of the technique developed in this thesis as a tool in the design and analysis of IG units subject to blast loads.

Sequeira, Miguel Angel

1995-01-01T23:59:59.000Z

340

February 16, 2011, Annual Workforce Analysis and Staffing Plan...  

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

February 16,2011 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL (FTCP) FROM: FRANK 0. RUSSO w J & SENIOR ADVISOR FOR ENVIRONMENT SAFETY AND HEALTH...

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Y-12 selects small businesses to assist with staffing needs ...  

National Nuclear Security Administration (NNSA)

existing subcontracts to better serve the site with respect to efficiency and overall cost savings. The two companies' focus on meeting Y-12 needs, relationship building with...

342

Producing Precarity: The Temporary Staffing Agency in the Labor Market  

E-Print Network (OSTI)

baristas and armies of dishwashers/utility workers. Thehouse work alongside dishwashers, but the former are amonglabor. Similarly, while dishwashers tend to make up the

Elcioglu, Emine Fidan

2010-01-01T23:59:59.000Z

343

2010 Annual Workforce Analysis and Staffing Plan Report - PPPO  

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

and 3 at Paducah)* HC 3: 1 (* NOTE: This does not include those facilities under the USEC Lease Agreement, such as the production buildings at Portsmouth and Paducah) Number of...

344

Parameter Shortest Path Algorithms with an Application to Cyclic Staffing  

E-Print Network (OSTI)

Let G = (V,E) be a digraph with n vertices including a special vertex s. Let E' C E be a designated subset of edges. For each e E E there is an associated real number fl(e). Furthermore, let 1 if e E E' f2(e): 0 if e E-E' ...

Karp, Richard M.

345

2011 Annual Workforce Analysis and Staffing Plan Report - PPPO  

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

22, 2012 22, 2012 Reporting Office: Portsmouth/Paducah Project Office Section One: Current Mission(s) of the Organization and Potential Changes The PPPO mission is to effectively implement EM responsibilities, obligations and activities at the Department's Portsmouth, Ohio and Paducah, Kentucky, sites: Accomplish environmental remediation actions in compliance with regulatory milestones and agreements. Disposition legacy and newly generated waste. Implement Cold Shutdown requirements. Disposition of depleted uranium hexafluoride cylinders stored at both sites. Perform Decontamination and Decommissioning of the Portsmouth Gaseous Diffusion Plant The PPPO Manager serves as the line manager reporting to the Assistant Secretary for Environmental

346

AN EFFICIENT APPROXIMATION OF THE CORONAL HEATING RATE FOR USE IN GLOBAL SUNHELIOSPHERE SIMULATIONS  

E-Print Network (OSTI)

The origins of the hot solar corona and the supersonically expanding solar wind are still the subject of debate. A key obstacle in the way of producing realistic simulations of the Sunheliosphere system is the lack of a physically motivated way of specifying the coronal heating rate. Recent one-dimensional models have been found to reproduce many observed features of the solar wind by assuming the energy comes from Alfvn waves that are partially reflected, then dissipated by magnetohydrodynamic turbulence. However, the nonlocal physics of wave reflection has made it difficult to apply these processes to more sophisticated (three-dimensional) models. This paper presents a set of robust approximations to the solutions of the linear Alfvn wave reflection equations. A key ingredient of the turbulent heating rate is the ratio of inward-to-outward wave power, and the approximations developed here allow this to be written explicitly in terms of local plasma properties at any given location. The coronal heating also depends on the frequency spectrum of Alfvn waves in the open-field corona, which has not yet been measured directly. A modelbased assumption is used here for the spectrum, but the results of future measurements can be incorporated easily. The resulting expression for the coronal heating rate is self-contained, computationally efficient, and applicable directly to global models of the corona and heliosphere. This paper tests and validates the approximations by comparing the results to exact solutions of the wave transport equations in several cases relevant to the fast and slow solar wind. Key words: interplanetary medium magnetohydrodynamics (MHD) solar wind Sun: corona turbulence waves Online-only material: tar file of source code 1.

Steven R. Cranmer

2010-01-01T23:59:59.000Z

347

When is the two-level approximation untenable in issues of Decoherence?  

E-Print Network (OSTI)

We examine the conditions in favor and necessity of a realistic multileveled description of a decohering quantum system. Under these conditions approximate techniques to simplify a multileveled system by its first two levels is unreliable and a realistic multilevel description in the formulation of decoherence is unavoidable. In this regard, our first crucial observation is that, the validity of the two level approximation of a multileveled system is not controlled purely by {\\it sufficiently low temperatures}. We demonstrate using three different environmental spectral models that the type of system-environment coupling and the environmental spectrum have a dominant role over the temperature. Particularly, zero temperature quantum fluctuations induced by the Caldeira-Leggett type linear coordinate coupling can be influential in a wide energy range in the systems allowed transitions. The second crucial observation against the validity of the two level approximation is that the decoherence times being among the system's short time scales are found to be dominated not by the resonant but {\\it non-resonant} processes. We demonstrate this in three stages. Firstly, our zero temperature numerical calculations reveal that, the calculated decoherence rates including relaxation, dephasing and leakage phenomena show, a linear dependence on the spectral area for all spectral models used, independent from the spectral shape within a large environmental spectral range compared to the quantum system's energies. Secondly, within the same range, the decoherence times only have a marginal dependence on the translations of the entire frequency spectrum. Finally, the same decoherence rates show strong dependence on the number of coupled levels by the system-environment coupling.

Kerim Savran; Tugrul Hakioglu; Emine Mese

2004-06-22T23:59:59.000Z

348

Optimal Design of Transonic Fan Blade Leading Edge Shape Using CFD and Simultaneous Perturbation Stochastic Approximation Method  

E-Print Network (OSTI)

Simultaneous Perturbation Stochastic Approximation method has attracted considerable application in many different areas such as statistical parameter estimation, feedback control, simulation-based optimization, signal & ...

Xing, X.Q.

349

p-barp-Annihilation processes in the tree approximation of SU(3) chiral effective theory  

Science Conference Proceedings (OSTI)

The p-barp-annihilation reactions p-barp {yields} {eta}{eta} {eta} and p-barp {yields} {eta}KK-bar at rest are considered in the tree approximation in the framework of SU(3) chiral effective theory at leading order. The calculated branchings are compared with the data. The results for neutral ({eta}{eta}{eta}, K{sup 0}K-bar{sup 0}{sub {eta}}) and charged (K{sup +}K{sup -}{sub {eta}}) channels are essentially different.

Tarasov, V. E.; Kudryavtsev, A. E., E-mail: kudryavt@itep.ru; Romanov, A. I.; Weinberg, V. M. [Institute of Theoretical and Experimental Physics (Russian Federation)

2012-12-15T23:59:59.000Z

350

Shock wave collisions in AdS5: approximate numerical solutions  

E-Print Network (OSTI)

We numerically study the evolution of a boost-invariant N=4 SYM medium using AdS/CFT. We consider a toy model for the collision of gravitational shock waves, finding that the energy density first increases, reaches a maximum and then starts to decrease, matching hydrodynamics for late times. For the initial conditions we consider, the hydrodynamic scale governing the late time behaviour is to very good approximation determined by the area of the black hole horizon at initial times. Our results provide a toy model for the early time evolution of the bulk system in heavy-ion collisions at RHIC and the LHC.

Bin Wu; Paul Romatschke

2011-08-18T23:59:59.000Z

351

Parallel FE Approximation of the Even/Odd Parity Form of the Linear Boltzmann Equation  

Science Conference Proceedings (OSTI)

A novel solution method has been developed to solve the linear Boltzmann equation on an unstructured triangular mesh. Instead of tackling the first-order form of the equation, this approach is based on the even/odd-parity form in conjunction with the conventional mdtigroup discrete-ordinates approximation. The finite element method is used to treat the spatial dependence. The solution method is unique in that the space-direction dependence is solved simultaneously, eliminating the need for the conventional inner iterations, and the method is well suited for massively parallel computers.

Drumm, Clifton R.; Lorenz, Jens

1999-07-21T23:59:59.000Z

352

Approximate Integrals of rf-driven Particle Motion in Magnetic Field  

DOE Green Energy (OSTI)

For a particle moving in nonuniform magnetic field under the action of an rf wave, ponderomotive effects result from rf-driven oscillations nonlinearly coupled with Larmor rotation. Using Lagrangian and Hamiltonian formalism, we show how, despite this coupling, two independent integrals of the particle motion are approximately conserved. Those are the magnetic moment of free Larmor rotation and the quasi-energy of the guiding center motion parallel to the magnetic field. Under the assumption of non-resonant interaction of the particle with the rf field, these integrals represent adiabatic invariants of the particle motion.

I.Y. Dodin; N.J. Fisch

2004-04-26T23:59:59.000Z

353

The low-energy nuclear density of states and the saddle point approximation  

E-Print Network (OSTI)

The nuclear density of states plays an important role in nuclear reactions. At high energies, above a few MeV, the nuclear density of states is well described by a formula that depends on the smooth single particle density of states at the Fermi surface, the nuclear shell correction and the pairing energy. In this paper we present an analysis of the low energy behaviour of the nuclear density of states using the saddle point approximation and extensions to it. Furthermore, we prescribe a simple parabolic form for excitation energy, in the low energy limit, which may facilitate an easy computation of level densities.

Sanjay K. Ghosh; Byron K. Jennings

2001-07-30T23:59:59.000Z

354

Post-quasistatic approximation as a test bed for numerical relativity  

Science Conference Proceedings (OSTI)

It is shown that observers in the standard ADM 3+1 treatment of matter are the same as the observers used in the matter treatment of Bondi: they are comoving and local Minkowskian. Bondi's observers are the basis of the post-quasistatic approximation (PQSA) to study a contracting distribution of matter. This correspondence suggests the possibility of using the PQSA as a test bed for numerical relativity. The treatment of matter by the PQSA and its connection with the ADM 3+1 treatment are presented, for its practical use as a calibration tool and as a test bed for numerical relativistic hydrodynamic codes.

Barreto, W. [Centro de Fisica Fundamental, Facultad de Ciencias, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of)

2009-05-15T23:59:59.000Z

355

Some numerical reslts on best uniform polynomial approximation of. chi. sup. alpha. on (0,1)  

Science Conference Proceedings (OSTI)

Let {alpha} be a positive number, and let E{sub n}(chi{sup {alpha}}; (0,1)) denote the error of best uniform approximation to {chi}{sup {alpha}}, by polynomials of degree at most n, on the interval (0,1). The Russian mathematician S.N. Bernstein established the existence of a nonnegative constant {Beta}({alpha}) such that {Beta}({alpha}):= {sub n{yields}{infinity}lim(2n){sup 2{alpha}}E{sub n}({chi}{sup {alpha}};(0.1)). In addition, Bernstein showed that {Beta}{alpha} 0) and that {Gamma}(2{alpha}){vert bar}sin({pi}{alpha}){vert bar}/{pi} (1{minus}1/2{alpha}{minus}1) {1/2}), so that the asymptotic behavior of {Beta}({alpha}) is known when {alpha}{yields}{infinity}. Still, the problem of trying to determine {Beta}({alpha}) more precisely, for all {alpha} > 0, is intriguing. To this end, we have rigorously determined the numbers for thirteen values of {alpha}, where these numbers were calculated with a precision of at least 200 significant digits. For each of these thirteen values of {alpha}, Richardson's extrapolation was applied to the products to obtain estimates of {Beta}({alpha}) to approximately 40 decimal places. Included are graphs of the points ({alpha},{Beta}({alpha})) for the thirteen values of {alpha} that we considered.

Carpenter, A.J.; Varga, R.S.

1992-01-01T23:59:59.000Z

356

Some numerical reslts on best uniform polynomial approximation of. chi. sup. alpha. on (0,1)  

SciTech Connect

Let {alpha} be a positive number, and let E{sub n}(chi{sup {alpha}}; (0,1)) denote the error of best uniform approximation to {chi}{sup {alpha}}, by polynomials of degree at most n, on the interval (0,1). The Russian mathematician S.N. Bernstein established the existence of a nonnegative constant {Beta}({alpha}) such that {Beta}({alpha}):= {sub n{yields}{infinity}lim(2n){sup 2{alpha}}E{sub n}({chi}{sup {alpha}};(0.1)). In addition, Bernstein showed that {Beta}{alpha} < {Gamma}(2{alpha}){vert bar}sin(pi}{alpha}){vert bar}/{pi} ({alpha} > 0) and that {Gamma}(2{alpha}){vert bar}sin({pi}{alpha}){vert bar}/{pi} (1{minus}1/2{alpha}{minus}1) < {Beta}({alpha}) ({alpha} > {1/2}), so that the asymptotic behavior of {Beta}({alpha}) is known when {alpha}{yields}{infinity}. Still, the problem of trying to determine {Beta}({alpha}) more precisely, for all {alpha} > 0, is intriguing. To this end, we have rigorously determined the numbers for thirteen values of {alpha}, where these numbers were calculated with a precision of at least 200 significant digits. For each of these thirteen values of {alpha}, Richardson's extrapolation was applied to the products to obtain estimates of {Beta}({alpha}) to approximately 40 decimal places. Included are graphs of the points ({alpha},{Beta}({alpha})) for the thirteen values of {alpha} that we considered.

Carpenter, A.J.; Varga, R.S.

1992-01-01T23:59:59.000Z

357

An application of distributed approximating functional-wavelets to reactive scattering  

SciTech Connect

A newly developed distributed approximating functional (DAF)-wavelet, the Dirichlet{endash}Gabor DAF-wavelet (DGDW), is applied in a calculation of the state-to-state reaction probabilities for the three-dimensional (3-D) (J=0)H+H{sub 2} reaction, using the time-independent wave-packet reactant-product decoupling (TIWRPD) method. The DGDWs are reconstructed from a rigorous mathematical sampling theorem, and are shown to be DAF-wavelet generalizations of both the sine discrete variable representation (sinc-DVR) and the Fourier distributed approximating functionals (DAFs). An important feature of the generalized sinc-DVR representation is that the grid points are distributed at equally spaced intervals and the kinetic energy matrix has a banded, Toeplitz structure. Test calculations show that, in accordance with mathematical sampling theory, the DAF-windowed sinc-DVR converges much more rapidly and to higher accuracy with bandwidth, 2W+1. The results of the H+H{sub 2} calculation are in very close agreement with the results of previous TIWRPD calculations, demonstrating that the DGDW representation is an accurate and efficient representation for use in FFT wave-packet propagation methods, and that, more generally, the theory of wavelets and related techniques have great potential for the study of molecular dynamics. {copyright} {ital 1998 American Institute of Physics.}

Wei, G.W.; Althorpe, S.C.; Kouri, D.J. [Department of Chemistry and Department of Physics, University of Houston, Houston, Texas77204-5641 (United States); Hoffman, D.K. [Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa50011 (United States)

1998-05-01T23:59:59.000Z

358

A scattered data approximation tool to map single-walled carbon nanotube dispersion to the processing parameters in polymer nanocomposites  

Science Conference Proceedings (OSTI)

The relationship of nanocomposite dispersion to dispersion techniques and other processing parameters was studied. Examining all permutations of the various factors in the laboratory is a challenging task. In this paper, we propose to map a correlation ... Keywords: CNTs, RBF, carbon nanotubes, classification, dispersion, feature selection, functional mapping, greedy algorithms, nanotechnology, polymer nanocomposites, polymer processing, radial basis function, scattered data approximation, sequential function approximation

Jonathan W. Lee; Andrew J. Meade; Enrique V. Barrera

2010-08-01T23:59:59.000Z

359

Determination of a control parameter in a one-dimensional parabolic equation using the moving least-square approximation  

Science Conference Proceedings (OSTI)

In this paper the approximation of moving least-square (MLS) is used for finding the solution of a one-dimensional parabolic inverse problem with source control parameter. Comparing with other numerical methods based on meshes such as finite difference ... Keywords: inverse problem, meshless method, moving least-square approximation, overspecification, parabolic equation

Rongjun Cheng

2008-09-01T23:59:59.000Z

360

Estimation of a new stochastic transform for solving the complex exponentials approximation problem: Computational aspects and applications  

Science Conference Proceedings (OSTI)

Many real life problems can be reduced to the solution of a complex exponentials approximation problem which is usually ill-posed. Recently a new transform for solving this problem, formulated as a specific moments problem in the plane, has been proposed ... Keywords: Complex moments problem, Logarithmic potentials, Pad approximants, Pencils of matrices, Random determinants

Piero Barone

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

On the Elimination of Reactive Element Loops and the Useof Special Approximations in the Design of OTA-C Filters  

Science Conference Proceedings (OSTI)

Loops of reactive elements in passive filters cause a series of problems in OTA-C simulations of these structures. These loops can be eliminated in a systematic way by the procedures described in the paper. The use of special approximations in the ... Keywords: OTA-C filters, approximation, filters

Antonio Carlos M. De Queiroz; Luiz P. Caloba

1997-07-01T23:59:59.000Z

362

The d-bar approach to approximate inverse scattering at fixed energy in three dimensions  

E-Print Network (OSTI)

We develop the d-bar approach to inverse scattering at fixed energy in dimensions $d\\ge 3$ of [Beals, Coifman 1985] and [Henkin, Novikov 1987]. As a result we propose a stable method for nonlinear approximate finding a potential $v$ from its scattering amplitude $f$ at fixed energy $E>0$ in dimension $d=3$. In particular, in three dimensions we stably reconstruct n-times smooth potential $v$ with sufficient decay at infinity, $n>3$, from its scattering amplitude $f$ at fixed energy $E$ up to $O(E^{-(n-3-\\epsilon)/2})$ in the uniform norm as $E\\to +\\infty$ for any fixed arbitrary small $\\epsilon >0$ (that is with almost the same decay rate of the error for $E\\to +\\infty$ as in the linearized case near zero potential).

Roman Novikov

2005-05-10T23:59:59.000Z

363

Approximate Bregman near neighbors in sublinear time: Beyond the triangle inequality  

E-Print Network (OSTI)

Bregman divergences are important distance measures that are used extensively in data-driven applications such as computer vision, text mining, and speech processing, and are a key focus of interest in machine learning. Answering nearest neighbor (NN) queries under these measures very important in these applications and has been the subject of extensive study, but is problematic because these distance measures lack metric properties like symmetry and the triangle inequality. In this paper, we present the first approximate nearest-neighbor (ANN) algorithms, which run in polylog(n) time for Bregman divergences of fixed dimension. To do so, we explore two properties of Bregman divergences that are vital to the analysis: a reverse triangle inequality (RTI) and a relaxed triangle inequality called mu-defectiveness. We show that even though Bregman divergences do not satisfy the triangle inequality, the above properties can be utilized to design an efficient search data structure that follows the general two-stage ...

Abdullah, Amirali; Venkatasubramanian, Suresh

2011-01-01T23:59:59.000Z

364

Skyrme-Random-Phase-Approximation description of spin-flip and orbital giant resonances  

E-Print Network (OSTI)

The self-consistent separable random-phase approximation (SRPA) model with Skyrme forces is extended to the case of magnetic excitations and applied to the description of spin-flip and orbital M1 giant resonances in the isotopic chain $^{142-152}$Nd. The Skyrme forces SkT6, SkM*, SLy6 and SkI3 are used. The calculations show the onset of the scissors mode with increasing deformation. A specific three-peak structure of the spin-flip response is found and explained by particular neutron and proton spin-flip transitions. Although the employed forces provide an acceptable qualitative description, the Skyrme functional still needs further improvement to reproduce quantitatively the experimental data.

V. O. Nesterenko; J. Kvasil; P. Vesely; W. Kleinig; P. -G. Reinhard

2009-11-12T23:59:59.000Z

365

Low-lying states of heavy nuclei within the nucleon pair approximation  

Science Conference Proceedings (OSTI)

In this article we perform systematic calculations on low-lying states of 33 nuclei with A=202-212, using the nucleon pair approximation of the shell model. We use a phenomenological shell-model Hamiltonian that includes single-particle energies, monopole and quadrupole pairing interactions, and quadrupole-quadrupole interactions. The building blocks of our model space include one J=4 valence neutron pair, and one J=4,6,8 valence proton pair, in addition to the usual S and D pairs. We calculate binding energies, excitation energies, electric quadrupole and magnetic dipole moments of low-lying states, and E2 transition rates between low-lying states. Our calculated results are reasonably consistent with available experimental data. The calculated quadrupole moments and magnetic moments, many of which have not yet been measured for these nuclei, are useful for future experimental measurements.

Xu, Z. Y.; Lei, Y. [Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Zhao, Y. M. [Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000 (China); CCAST, World Laboratory, P.O. Box 8730, Beijing 100080 (China); Xu, S. W.; Xie, Y. X. [Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Arima, A. [Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Science Museum, Japan Science Foundation, 2-1 Kitanomaru-koen, Chiyoda-ku, Tokyo 102-0091 (Japan)

2009-05-15T23:59:59.000Z

366

Applicability of Boussinesq approximation in a turbulent fluid with constant properties  

E-Print Network (OSTI)

The equations of motion describing buoyant fluids are often simplified using a set of approximations proposed by J. Boussinesq one century ago. To resume, they consist in assuming constant fluid properties, incompressibility and conservation of calories during heat transport. Assuming fulfilment of the first requirement (constant fluid properties), we derive a set of 4 criteria for assessing the validity of the two other requirements in turbulent Rayleigh-B\\'enard convection. The first criterion $\\alpha \\Delta \\ll 1 $ simply results from the incompressibility condition in the thermal boundary layer ($\\alpha$ and $\\Delta$ are the thermal expansion coefficient and the temperature difference driving the flow). The 3 other criteria are proportional or quadratic with the density stratification or, equivalently with the temperature difference resulting from the adiabatic gradient across the cell $\\Delta_{h}$. Numerical evaluations with air, water and cryogenic helium show that most laboratory experiments are free f...

Roche, Philippe-Emmanuel P -E

2007-01-01T23:59:59.000Z

367

Nuclear matter EOS with light clusters within the mean-field approximation  

E-Print Network (OSTI)

The crust of a neutron star is essentially determined by the low-density region ($\\rholight clusters in nuclear matter will be energetically favorable at finite temperature. At very low densities and moderate temperatures, the few body correlations are expected to become important and light nuclei like deuterons, tritons, helions and $\\alpha$-particles will form. Due to Pauli blocking, these clusters will dissolve at higher densities $\\rho\\gtrsim 0.1\\rho_0$. The presence of these clusters influences the cooling process and quantities, such as the neutrino emissivity and gravitational waves emission. The dissolution density of these light clusters, treated as point-like particles, will be studied within the Relativistic Mean Field approximation. In particular, the dependence of the dissolution density on the clusters-meson couplings is studied.

Mrcio Ferreira; Constana Providncia

2013-07-09T23:59:59.000Z

368

Bayesian inference of solar and stellar magnetic fields in the weak-field approximation  

E-Print Network (OSTI)

The weak-field approximation is one of the simplest models that allows us to relate the observed polarization induced by the Zeeman effect with the magnetic field vector present on the plasma of interest. It is usually applied for diagnosing magnetic fields in the solar and stellar atmospheres. A fully Bayesian approach to the inference of magnetic properties in unresolved structures is presented. The analytical expression for the marginal posterior distribution is obtained, from which we can obtain statistically relevant information about the model parameters. The role of a-priori information is discussed and a hierarchical procedure is presented that gives robust results that are almost insensitive to the precise election of the prior. The strength of the formalism is demonstrated through an application to IMaX data. Bayesian methods can optimally exploit data from filter-polarimeters given the scarcity of spectral information as compared with spectro-polarimeters. The effect of noise and how it degrades ou...

Ramos, A Asensio

2011-01-01T23:59:59.000Z

369

Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co  

SciTech Connect

The determination of quasicrystal (QC) surface structures is a challenge to current surface structure techniques. Low-energy electron diffraction (LEED) is the primary technique for the determination of periodic surface structures, but application of dynamical LEED to quasicrystals requires the use of many approximations. In this study, two different approaches were used to apply dynamical LEED to the structure of the tenfold surface of decagonal Al{sub 73}Ni{sub 10}Co{sub 17}. One method (method 1) involves the use of a quasicrystalline model along with approximations that average over the composition and local geometries. The other method (method 2) uses periodic models that approximate the actual local QC structure (approximants) in more exact, atomistic calculations. Although the results using the two methods were consistent, the results of the approximant analysis (method 2) suggested a different way to apply the approximations in method 1, resulting in a better fit between experimental and calculated beams. Thus, periodic approximant structure models can provide a simpler and more efficient method for the determination of local geometries in QC surfaces, and may also facilitate analyses using quasicrystal models.

Pussi, K.; Ferralis, N.; Mihalkovic, M.; Widom, M.; Curtarolo, S.; Gierer, M.; Jenks, C. J.; Canfield, P.; Fisher, I. R.; Diehl, R. D. [Department of Electrical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851 Lappeenranta (Finland); Physics Department and Materials Research Institute, Penn State University, University Park, Pennsylvania 16802 (United States); Slovak Academy of Sciences, Dubravska Cesta 9, Bratislava 84228 (Slovakia); Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States); Department of Materials Science and Mechanical Engineering, Duke University, Durham, North Carolina 27708 (United States); Institute for Crystallography and Applied Mineralogy, Theresienstrasse 41, 80333 Muenchen (Germany); Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States); Physics Department and Materials Research Institute, Penn State University, University Park, Pennsylvania 16802 (United States)

2006-05-01T23:59:59.000Z

370

Discretization and Approximation Methods for Reinforcement Learning of Highly Reconfigurable Systems  

E-Print Network (OSTI)

There are a number of techniques that are used to solve reinforcement learning problems, but very few that have been developed for and tested on highly reconfigurable systems cast as reinforcement learning problems. Reconfigurable systems refers to a vehicle (air, ground, or water) or collection of vehicles that can change its geometrical features, i.e. shape or formation, to perform tasks that the vehicle could not otherwise accomplish. These systems tend to be optimized for several operating conditions, and then controllers are designed to reconfigure the system from one operating condition to another. Q-learning, an unsupervised episodic learning technique that solves the reinforcement learning problem, is an attractive control methodology for reconfigurable systems. It has been successfully applied to a myriad of control problems, and there are a number of variations that were developed to avoid or alleviate some limitations in earlier version of this approach. This dissertation describes the development of three modular enhancements to the Q-learning algorithm that solve some of the unique problems that arise when working with this class of systems, such as the complex interaction of reconfigurable parameters and computationally intensive models of the systems. A multi-resolution state-space discretization method is developed that adaptively rediscretizes the state-space by progressively finer grids around one or more distinct Regions Of Interest within the state or learning space. A genetic algorithm that autonomously selects the basis functions to be used in the approximation of the action-value function is applied periodically throughout the learning process. Policy comparison is added to monitor the state of the policy encoded in the action-value function to prevent unnecessary episodes at each level of discretization. This approach is validated on several problems including an inverted pendulum, reconfigurable airfoil, and reconfigurable wing. Results show that the multi-resolution state-space discretization method reduces the number of state-action pairs, often by an order of magnitude, required to achieve a specific goal and the policy comparison prevents unnecessary episodes once the policy has converged to a usable policy. Results also show that the genetic algorithm is a promising candidate for the selection of basis functions for function approximation of the action-value function.

Lampton, Amanda K.

2009-12-01T23:59:59.000Z

371

Alterations of the Climate of a Primitive Equation Model produced by Filtering Approximations and Subsequent Tuning and Stochastic Forcing  

Science Conference Proceedings (OSTI)

The simulated climates of highly truncated nonlinear models based on the primitive equations (PE), balance equations (BE) and quasi-geostrophic (QG) equations are compared, in order to determine the effects of the filtering approximations. The ...

Ross N. Hoffman

1981-03-01T23:59:59.000Z

372

Improved Normalization of the Size Distribution of Atmospheric Particles Retrieved from Aureole Measurements Using the Diffraction Approximation  

Science Conference Proceedings (OSTI)

This paper describes an improvement in the diffraction approximation used to retrieve the size distribution of atmospheric particles from solar aureole radiance measurements. Normalization using total optical thickness based on measurement of the ...

J. G. DeVore

2011-08-01T23:59:59.000Z

373

Implementing the Delta-Four-Stream Approximation for Solar Radiation Computations in an Atmosphere General Circulation Model  

Science Conference Proceedings (OSTI)

Proper quantification of the solar radiation budget and its transfer within the atmosphere is of utmost importance in climate modeling. The delta-four-stream (DFS) approximation has been demonstrated to offer a more accurate computational method ...

Tarek Ayash; Sunling Gong; Charles Q. Jia

2008-07-01T23:59:59.000Z

374

Analytical Solutions to the Collection Growth Equation: Comparison with Approximate Methods and Application to Cloud Microphysics Parameterization Schemes  

Science Conference Proceedings (OSTI)

A closed form solution for the collection growth equation as used in bulk microphysical parameterizations is derived. Although the general form is mathematically complex, it can serve as a benchmark for testing a variety of approximations. Two ...

Johannes Verlinde; Piotr J. Flatau; William R. Cotton

1990-12-01T23:59:59.000Z

375

Approximation of Ocean Heat Storage by OceanAtmosphere Energy Exchange: Implications for Seasonal Cycle Mixed Layer Ocean Formulations  

Science Conference Proceedings (OSTI)

The approximation of ocean heat storage by the net surface energy flux and the implications for zonal mean SST simulation using mixed layer ocean formulation are examined. The analysis considers both constant and variable depth mixed layers. ...

Robert G. Gallimore; David D. Houghton

1987-08-01T23:59:59.000Z

376

Two-Stream Approximations to Radiative Transfer in Planetary Atmospheres: A Unified Description of Existing Methods and a New Improvement  

Science Conference Proceedings (OSTI)

Existing two-stream approximations to radiative transfer theory for particulate media are shown to be represented by identical forms of coupled differential equations if the intensity is replaced by integrals of the intensity over hemispheres. ...

W. E. Meador; W. R. Weaver

1980-03-01T23:59:59.000Z

377

Redundant operators in the exact renormalisation group and in the f(R) approximation to asymptotic safety  

E-Print Network (OSTI)

In this paper we review the definition and properties of redundant operators in the exact renormalisation group. We explain why it is important to require them to be eigenoperators and why generically they appear only as a consequence of symmetries of the particular choice of renormalisation group equations. This clarifies when Newton's constant and or the cosmological constant can be considered inessential. We then apply these ideas to the Local Potential Approximation and approximations of a similar spirit such as the f(R) approximation in the asymptotic safety programme in quantum gravity. We show that these approximations can break down if the fixed point does not support a `vacuum' solution in the appropriate domain: all eigenoperators become redundant and the physical space of perturbations collapses to a point. We show that this is the case for the recently discovered lines of fixed points in the f(R) flow equations.

Juergen A. Dietz; Tim R. Morris

2013-06-05T23:59:59.000Z

378

Methods, systems and apparatus for approximation of peak summed fundamental and third harmonic voltages in a multi-phase machine  

DOE Patents (OSTI)

Methods, system and apparatus are provided for quickly approximating a peak summed magnitude (A) of a phase voltage (Vph) waveform in a multi-phase system that implements third harmonic injection.

Ransom, Ray M. (Big Bear City, CA); Gallegos-Lopez, Gabriel (Torrance, CA); Kinoshita, Michael H. (Redondo Beach, CA)

2012-07-31T23:59:59.000Z

379

Evaluation of Various Approximations in Atmosphere and Ocean Modeling based on an Exact Treatment of Gravity Wave Dispersion  

Science Conference Proceedings (OSTI)

Various approximations of the governing equations of compressible fluid dynamics are commonly used in both atmospheric and ocean modeling. Their main purpose is to eliminate the acoustic waves that are potentially responsible for inefficiency in ...

John K. Dukowicz

380

An approximate-reasoning-based method for screening high-level waste tanks for flammable gas  

DOE Green Energy (OSTI)

The in situ retention of flammable gas produced by radiolysis and thermal decomposition in high-level waste can pose a safety problem if the gases are released episodically into the dome space of a storage tank. Screening efforts at Hanford have been directed at identifying tanks in which this situation could exist. Problems encountered in screening motivated an effort to develop an improved screening methodology. Approximate reasoning (AR) is a formalism designed to emulate the kinds of complex judgments made by subject matter experts. It uses inductive logic structures to build a sequence of forward-chaining inferences about a subject. AR models incorporate natural language expressions known as linguistic variables to represent evidence. The use of fuzzy sets to represent these variables mathematically makes it practical to evaluate quantitative and qualitative information consistently. The authors performed a pilot study to investigate the utility of AR for flammable gas screening. They found that the effort to implement such a model was acceptable and that computational requirements were reasonable. The preliminary results showed that important judgments about the validity of observational data and the predictive power of models could be made. These results give new insights into the problems observed in previous screening efforts.

Eisenhawer, S.W.; Bott, T.F.; Smith, R.E.

1998-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Discrete Dipole Approximation for Low-Energy Photoelectron Emission from NaCl Nanoparticles  

SciTech Connect

This work presents a model for the photoemission of electrons from sodium chloride nanoparticles 50-500 nm in size, illuminated by vacuum ultraviolet light with energy ranging from 9.4-10.9 eV. The discrete dipole approximation is used to calculate the electromagnetic field inside the particles, from which the two-dimensional angular distribution of emitted electrons is simulated. The emission is found to favor the particle?s geometrically illuminated side, and this asymmetry is compared to previous measurements performed at the Lawrence Berkeley National Laboratory. By modeling the nanoparticles as spheres, the Berkeley group is able to semi-quantitatively account for the observed asymmetry. Here however, the particles are modeled as cubes, which is closer to their actual shape, and the interaction of an emitted electron with the particle surface is also considered. The end result shows that the emission asymmetry for these low-energy electrons is more sensitive to the particle-surface interaction than to the specific particle shape, i.e., a sphere or cube.

Berg, Matthew J.; Wilson, Kevin R.; Sorensen, Chris; Chakrabarti, Amit; Ahmed, Musahid

2011-09-22T23:59:59.000Z

382

BILAM: a composite laminate failure-analysis code using bilinear stress-strain approximations  

DOE Green Energy (OSTI)

The BILAM code which uses constant strain laminate analysis to generate in-plane load/deformation or stress/strain history of composite laminates to the point of laminate failure is described. The program uses bilinear stress-strain curves to model layer stress-strain behavior. Composite laminates are used for flywheels. The use of this computer code will help to develop data on the behavior of fiber composite materials which can be used by flywheel designers. In this program the stress-strain curves are modelled by assuming linear response in axial tension while using bilinear approximations (2 linear segments) for stress-strain response to axial compressive, transverse tensile, transverse compressive and axial shear loadings. It should be noted that the program attempts to empirically simulate the effects of the phenomena which cause nonlinear stress-strain behavior, instead of mathematically modelling the micromechanics involved. This code, therefore, performs a bilinear laminate analysis, and, in conjunction with several user-defined failure interaction criteria, is designed to provide sequential information on all layer failures up to and including the first fiber failure. The modus operandi is described. Code BILAM can be used to: predict the load-deformation/stress-strain behavior of a composite laminate subjected to a given combination of in-plane loads, and make analytical predictions of laminate strength.

McLaughlin, P.V. Jr.; Dasgupta, A.; Chun, Y.W.

1980-10-01T23:59:59.000Z

383

Existence of Ground State of an Electron in the BDF Approximation  

E-Print Network (OSTI)

The Bogoliubov-Dirac-Fock (BDF) model allows to describe relativistic elec- trons interacting with the Dirac sea. It can be seen as a mean-field approximation of Quantum Electro-dynamics (QED) where photons are neglected. This paper treats the case of an electron together with the Dirac sea in absence of any external field. Such a system is described by its one-body density matrix, an infinite rank, self-adjoint operator which is a compact pertubation of the negative spectral projector of the free Dirac operator. We prove the existence of minimizers of the BDF-energy under the charge constraint of one electron assuming that the coupling constant {\\alpha} and the quantity L = \\alpha log(\\Lambda) are small where \\Lambda > 0 is the ultraviolet cut-off and chosen very large. We then study the non-relativistic limit of such a system in which the speed of light c tends to infinity (or equivalently \\alpha tends to zero) with L fixed: after rescaling the electronic solution tends to the Choquard-Pekar ground state.

Jrmy Sok

2012-11-16T23:59:59.000Z

384

Beyond the born approximation: Measuring the two-photon exchange effect at CLAS  

Science Conference Proceedings (OSTI)

Recent results from experiments at Jefferson Laboratory, Newport News VA, which measured the ratio of the electric to magnetic form factors of the proton, G{sub E}/G{sub M}, have forced us to reexamine the single photon exchange approximation in lepton-proton elastic scattering. Discrepancies between the ratio obtained via the time-tested Rosenbluth separation method and newer polarization transfer measurements, which differ by as much as a factor of three, may be resolved by considering the effect of two photon exchange (TPE) processes. The CLAS TPE experiment at Jefferson Laboratory, will determine the effect of two-photon exchange in elastic lepton-proton scattering by precisely measuring the ratio of positron-proton to electron-proton elastic cross sections over a large kinematic range (0.1 CEBAF), onto a set of radiators and converters to produce simultaneous and identical beams of electron and positrons which collide with our proton target. Acceptance and efficiency concerns are minimized by only considering the ratios of the elastic cross sections and by switching polarity of magnets in the beamline and the spectrometer. Guided by the results of a short 2006 test run and extensive GEANT based modeling, new shielding and beamline components were designed to maximize luminosity. We took data from November 2010 - February 2011. The unique experimental design and challenges of the TPE experiment and the current analysis status will be presented.

Robert Paul Bennett

2012-04-01T23:59:59.000Z

385

Born-Oppenheimer-type Approximations for Degenerate Potentials: Recent Results and a Survey on the area  

E-Print Network (OSTI)

This paper is devoted to the asymptotics of eigenvalues for a Schr\\"o-dinger operator in the case when the potential V does not tend to infinity at infinity. Such a potential is called degenerate. The point is that the set in the phase space where the associated hamiltonian is smaller than a fixed energy E may have an infinite volume, so that the Weyl formula which gives the behaviour of the counting function has to be revisited. We recall various results in this area, in the classical context as well as in the semi-classical one and comment the different methods. In sections 3, 4 we present our joint works with A Morame, (Universit\\'e de Nantes),concerning a degenerate potential V(x) =f(y) g(z), where g is assumed to be a homogeneous positive function of m variables, and f is a smooth and strictly positive function of n variables, with a minimum in 0. In the case where f tends to infinity at infinity, we give the semi-classical asymptotic behaviour of the number of eigenvalues less than a fixed energy . Then we give a sharp estimate of the low eigenvalues, using a Born Oppenheimer approximation. With a refined approach we localize also higher energies . Finally we apply the previous methods to a class of potentials which vanish on a regular hypersurface.

Francoise Truc

2009-01-05T23:59:59.000Z

386

Prioritizing the purchase of spare parts using an approximate reasoning models.  

SciTech Connect

The complexity of a spare parts prioritization model should be consonant with the amount and quality of data available to populate it. When production processes are new and the reliability database is sparse and represents primarily expert knowledge, an approximate reasoning (AR) based model is appropriate. AR models are designed to emulate the inferential processes used by experts in making judgments. We have designed and tested such a model for the planned component production process for nuclear weapons at Los Alamos National Laboratory. The model successfully represents the experts knowledge concerning the frequency and consequences of a part failure. The use of linguistic variables provides an adaptable format for eliciting this knowledge and providing a consistent brisis for valuing the effect on production of different parts. Ranking the parts for inclusion in a spare parts inventory is a straightforward transformation of the AR output. The basis for this ranking is directly traceable to the elicitation results. AR-based models are well-suited to prioritization problems with these characteristics.

Eisenhawer, S. W. (Stephen W.); Bott, T. F. (Terrence F.); Jackson, J. W. (Joseph W.)

2001-01-01T23:59:59.000Z

387

Strong-field approximation for ionization of a diatomic molecule by a strong laser field  

Science Conference Proceedings (OSTI)

We present a theory of ionization of diatomic molecules by a strong laser field. A diatomic molecule is considered as a three-particle system, which consists of two heavy atomic (ionic) centers and an electron. After the separation of the center-of-mass coordinate, the dynamics of this system is reduced to the relative electronic and nuclear coordinates. The exact S-matrix element for ionization is presented in a form in which the laser-molecule interaction is emphasized. This form is useful for application of the molecular strong-field approximation (SFA). We introduced two forms of the molecular SFA, one with the field-free and the other with the field-dressed initial molecular bound state. We relate these two forms of our modified molecular SFA to the standard molecular SFAs, introduced previously using the length gauge and the velocity gauge. Numerical examples of the ionization rates of N{sub 2} and O{sub 2} molecules are shown and compared for all four versions of the molecular SFA and we suggest that our modified molecular SFA should be used instead of the standard molecular SFA.

Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina and Max-Born-Institut, Max-Born-Strasse 2a, 12489 Berlin (Germany)

2006-12-15T23:59:59.000Z

388

A correlated-polaron electronic propagator: open electronic dynamics beyond the Born-Oppenheimer approximation  

E-Print Network (OSTI)

In this work we develop a theory of correlated many-electron dynamics dressed by the presence of a finite-temperature harmonic bath. The theory is based on the ab-initio Hamiltonian, and thus well-defined apart from any phenomenological choice of collective basis states or electronic coupling model. The equation-of-motion includes some bath effects non-perturbatively, and can be used to simulate line- shapes beyond the Markovian approximation and open electronic dynamics which are subjects of renewed recent interest. Energy conversion and transport depend critically on the ratio of electron-electron coupling to bath-electron coupling, which is a fitted parameter if a phenomenological basis of many-electron states is used to develop an electronic equation of motion. Since the present work doesn't appeal to any such basis, it avoids this ambiguity. The new theory produces a level of detail beyond the adiabatic Born-Oppenheimer states, but with cost scaling like the Born-Oppenheimer approach. While developing this model we have also applied the time-convolutionless perturbation theory to correlated molecular excitations for the first time. Resonant response properties are given by the formalism without phenomenological parameters. Example propagations with a developmental code are given demonstrating the treatment of electron-correlation in absorption spectra, vibronic structure, and decay in an open system.

John A. Parkhill; Thomas Markovich; David G. Tempel; Alan Aspuru-Guzik

2012-06-12T23:59:59.000Z

389

A correlated-polaron electronic propagator: open electronic dynamics beyond the Born-Oppenheimer approximation  

E-Print Network (OSTI)

In this work we develop a theory of correlated many-electron dynamics dressed by the presence of a finite-temperature harmonic bath. The theory is based on the ab-initio Hamiltonian, and thus well-defined apart from any phenomenological choice of collective basis states or electronic coupling model. The equation-of-motion includes some bath effects non-perturbatively, and can be used to simulate line- shapes beyond the Markovian approximation and open electronic dynamics which are subjects of renewed recent interest. Energy conversion and transport depend critically on the ratio of electron-electron coupling to bath-electron coupling, which is a fitted parameter if a phenomenological basis of many-electron states is used to develop an electronic equation of motion. Since the present work doesn't appeal to any such basis, it avoids this ambiguity. The new theory produces a level of detail beyond the adiabatic Born-Oppenheimer states, but with cost scaling like the Born-Oppenheimer approach. While developing th...

Parkhill, John A; Tempel, David G; Aspuru-Guzik, Alan

2012-01-01T23:59:59.000Z

390

Skyrme random-phase-approximation description of spin-flip M1 giant resonance  

SciTech Connect

The spin-flip M1 giant resonance is explored in the framework of the random-phase-approximation (RPA) on the basis of the Skyrme energy functional. A representative set of eight Skyrme parametrizations (SkT6, SkM*, SLy6, SG2, SkO, SkO', SkI4, and SV-bas) is used. Light and heavy, spherical and deformed nuclei ({sup 48}Ca, {sup 158}Gd, {sup 208}Pb, and {sup 238}U) are considered. The calculations show that spin densities play a crucial role in forming the collective shift in the spectrum. The interplay of the collective shift and spin-orbit splitting determines the quality of the description. None of the considered Skyrme parametrizations is able to describe simultaneously the M1 strength distribution in closed-shell and open-shell nuclei. It is found that the problem lies in the relative positions of proton and neutron spin-orbit splitting. This calls for a better modeling of the tensor and isovector spin-orbit interaction.

Vesely, P.; Kvasil, J. [Institute of Particle and Nuclear Physics, Charles University, CZ-18000, Praha 8 (Czech Republic); Nesterenko, V. O. [Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, RU-141980 (Russian Federation); Kleinig, W. [Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, RU-141980 (Russian Federation); Technische Universitaet Dresden, Inst. fuer Analysis, D-0106 Dresden (Germany); Reinhard, P.-G. [Institut fuer Theoretische Physik II, Universitaet Erlangen, D-91058 Erlangen (Germany); Ponomarev, V. Yu. [Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

2009-09-15T23:59:59.000Z

391

BAYESIAN INFERENCE OF SOLAR AND STELLAR MAGNETIC FIELDS IN THE WEAK-FIELD APPROXIMATION  

SciTech Connect

The weak-field approximation is one of the simplest models that allows us to relate the observed polarization induced by the Zeeman effect with the magnetic field vector present on the plasma of interest. It is usually applied for diagnosing magnetic fields in the solar and stellar atmospheres. A fully Bayesian approach to the inference of magnetic properties in unresolved structures is presented. The analytical expression for the marginal posterior distribution is obtained, from which we can obtain statistically relevant information about the model parameters. The role of a priori information is discussed and a hierarchical procedure is presented that gives robust results that are almost insensitive to the precise election of the prior. The strength of the formalism is demonstrated through an application to IMaX data. Bayesian methods can optimally exploit data from filter polarimeters given the scarcity of spectral information as compared with spectro-polarimeters. The effect of noise and how it degrades our ability to extract information from the Stokes profiles is analyzed in detail.

Asensio Ramos, A., E-mail: aasensio@iac.es [Instituto de Astrofisica de Canarias, 38205, La Laguna, Tenerife (Spain); Departamento de Astrofisica, Universidad de La Laguna, E-38205 La Laguna, Tenerife (Spain)

2011-04-10T23:59:59.000Z

392

Radioactive waste management integrated data base: a bibliography. [Approximately 1100 references  

Science Conference Proceedings (OSTI)

The purpose of this indexed bibliography is to organize and collect the literature references on waste generation and treatment, characteristics, inventories, and costs. The references were captured into a searchable information file, and the information file was sorted, indexed, and printed for this bibliography. A completion of approximately 1100 references to nuclear waste management, the first of a series, is completed. Each reference is categorized by waste origin (commercial, defense, institutional, and foreign) and by subject area: (1) high-level wastes, (2) low-level wastes, (3) TRU wastes, (4) airborne wastes, (5) remedial action (formerly utilized sites, surplus facilities, and mill tailings), (6) isolation, (7) transportation, (8) spent fuel, (9) fuel cycle centers, and (10) a general category that covers nonspecific wastes. Five indexes are provided to assist the user in locating documents of interest: author, author affiliation (corporate authority), subject category, keyword, and permuted title. Machine (computer) searches of these indexes can be made specifying multiple constraints if so desired. This bibliography will be periodically updated as new information becomes available. In addition to being used in searches for specific data, the information file can also be used for resource document collection, names and addresses of contacts, and identification of potential sources of data.

Johnson, C.A.; Garland, P.A.

1980-09-01T23:59:59.000Z

393

Coarse-Graining Can Beat the Rotating Wave Approximation in Quantum Markovian Master Equations  

E-Print Network (OSTI)

We present a first-principles derivation of the Markovian semi-group master equation without invoking the rotating wave approximation (RWA). Instead we use a time coarse-graining approach which leaves us with a free timescale parameter, which we can optimize. Comparing this approach to the standard RWA-based Markovian master equation, we find that significantly better agreement is possible using the coarse-graining approach, for a three-level model coupled to a bath of oscillators, whose exact dynamics we can solve for at zero temperature. The model has the important feature that the RWA has a non-trivial effect on the dynamics of the populations. We show that the two different master equations can exhibit strong qualitative differences for the population of the energy eigenstates even for such a simple model. The RWA-based master equation misses an important feature which the coarse-graining based scheme does not. By optimizing the coarse-graining timescale the latter scheme can be made to approach the exact solution much more closely than the RWA-based master equation.

Christian Majenz; Tameem Albash; Heinz-Peter Breuer; Daniel A. Lidar

2013-03-26T23:59:59.000Z

394

An Approximate Dynamic Programming Approach to Benchmark Practice-based Heuristics for Natural Gas Storage Valuation  

E-Print Network (OSTI)

The valuation of the real option to store natural gas is a practically important problem that entails dynamic optimization of inventory trading decisions with capacity constraints in the face of uncertain natural gas price dynamics. Stochastic dynamic programming is a natural approach to this valuation problem, but it does not seem to be widely used in practice because it is at odds with the high-dimensional naturalgas price evolution models that are widespread among traders. According to the practice-based literature, practitioners typically value natural gas storage heuristically. The effectiveness of the heuristics discussed in this literature is currently unknown, because good upper bounds on the value of storage are not available. We develop a novel and tractable approximate dynamic programming method that coupled with Monte Carlo simulation computes lower and upper bounds on the value of storage, which we use to benchmark these heuristics on a set of realistic instances. We find that these heuristics are extremely fast but significantly suboptimal as compared to our upper bound, which appears to be fairly tight and much tighter than a simpler perfect information upper bound; our lower bound is slower to compute than these heuristics but substantially outperforms them in terms of valuation. Moreover, with periodic reoptimizations embedded in Monte Carlo simulation, the practice-based heuristics become nearly optimal, with one exception, at the expense of higher computational effort. Our lower bound with reoptimization is also nearly optimal, but exhibits a higher computational requirement than these heuristics. Besides natural gas storage, our results are potentially relevant for the valuation of the real option to store other commodities, such as metals, oil, and petroleum products. 1.

Guoming Lai; Franois Margot; Nicola Secom

2008-01-01T23:59:59.000Z

395

Approximate Maximum Principle for Discrete Approximations of ...  

E-Print Network (OSTI)

Detroit, MI 48202. Email: boris@math.wayne.edu. ILYA SHVARTSMAN. Department of Mathematics and Computer Science. Penn State University - Harrisburg.

396

Exact Coulomb exchange calculations in the Skyrme-Hartree-Fock-BCS framework and tests of the Slater approximation  

Science Conference Proceedings (OSTI)

An exact treatment of the Coulomb interaction is performed within the Skyrme-Hartree-Fock/Bardeen-Cooper-Schrieffer approach for even-even nuclei ranging from light to superheavy nuclei. A test of the usual Slater approximation for the exchange part is carried out. The error made on the exchange term of the Coulomb interaction when using this approximation follows two schematic patterns. Beyond a decreasing behavior when increasing the mass number A, a more important structural effect has been found. The relative error ranges roughly from 0 to 8% being maximal for light closed proton (sub-)shell nuclei and minimal for open proton (sub-)shell nuclei.

Le Bloas, J.; Quentin, P.; Bonneau, L. [Universite Bordeaux 1, CNRS/IN2P3, Centre d'Etudes Nucleaires de Bordeaux-Gradignan, Gradignan F-33175 (France); Koh, Meng-Hock [Universite Bordeaux 1, CNRS/IN2P3, Centre d'Etudes Nucleaires de Bordeaux-Gradignan, Gradignan F-33175 (France); Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor (Malaysia); Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia); Ithnin, J. I. A. [Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2011-07-15T23:59:59.000Z

397

The Generalized SIC-OEP formalism and the Generalized SIC-Slater approximation (stationary and time-dependent cases)  

E-Print Network (OSTI)

We present a generalized formulation of the Optimized Effective Potential (OEP) approach to the Self Interaction Correction (SIC) problem in Time Dependent (TD) Density Functional Theory (DFT). The formulation relies on the introduction of a double set of single electron orbitals. It allows the derivation of a generalized Slater approximation to the full OEP formulation, which extends the domain of validity of the standard Slater approximation. We discuss both formal aspects and practical applications of the new formalism and give illustrations in cluster and molecules. The new formalism provides a valuable ansatz to more elaborate (and computationally very demanding) full TD OEP and full TD SIC calculations especially in the linear domain.

Messud, J; Reinhard, P -G; ~Suraud, E

2010-01-01T23:59:59.000Z

398

The Generalized SIC-OEP formalism and the Generalized SIC-Slater approximation (stationary and time-dependent cases)  

E-Print Network (OSTI)

We present a generalized formulation of the Optimized Effective Potential (OEP) approach to the Self Interaction Correction (SIC) problem in Time Dependent (TD) Density Functional Theory (DFT). The formulation relies on the introduction of a double set of single electron orbitals. It allows the derivation of a generalized Slater approximation to the full OEP formulation, which extends the domain of validity of the standard Slater approximation. We discuss both formal aspects and practical applications of the new formalism and give illustrations in cluster and molecules. The new formalism provides a valuable ansatz to more elaborate (and computationally very demanding) full TD OEP and full TD SIC calculations especially in the linear domain.

J. Messud; P. M. Dinh; P. -G. Reinhard; E. ~Suraud

2010-07-24T23:59:59.000Z

399

Approximation of periodic functions in the classes H{sub q}{sup {Omega}} by linear methods  

Science Conference Proceedings (OSTI)

The following result is proved: if approximations in the norm of L{sub {infinity}} (of H{sub 1}) of functions in the classes H{sub {infinity}}{sup {Omega}} (in H{sub 1}{sup {Omega}}, respectively) by some linear operators have the same order of magnitude as the best approximations, then the set of norms of these operators is unbounded. Also Bernstein's and the Jackson-Nikol'skii inequalities are proved for trigonometric polynomials with spectra in the sets Q(N) (in {Gamma}(N,{Omega})). Bibliography: 15 titles.

Pustovoitov, Nikolai N [Moscow State Technical University 'MAMI', Moscow (Russian Federation)

2012-01-31T23:59:59.000Z

400

Modified Friedmann model in Randers-Finsler space of approximate Berwald type as a possible alternative to dark energy hypothesis  

E-Print Network (OSTI)

Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann model is proposed. It is showed that the accelerated expanding universe is guaranteed by a constrained Randers-Finsler structure without invoking dark energy. The geodesic in Randers-Finsler space is studied. The additional term in the geodesic equation acts as repulsive force against the gravity.

Chang, Zhe

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

The Use of Two-Stream Approximations for the Parameterization of Solar Radiative Energy Fluxes through Vegetation  

Science Conference Proceedings (OSTI)

Two-stream approximations have been used widely and for a long time in the field of radiative transfer through vegetation in various contexts and in the last 10 years also to model the hemispheric reflectance of vegetated surfaces in numerical ...

Joachim H. Josepoh; Jean Laquinta; Bernard Pinty

1996-10-01T23:59:59.000Z

402

Master problem approximations in Dantzig-Wolfe decomposition of variational inequality problems with applications to two energy market models  

Science Conference Proceedings (OSTI)

In this paper, a modification to Dantzig-Wolfe (DW) decomposition algorithm for variational inequality (VI) problems is considered to alleviate the computational burden and to facilitate model management and maintenance. As proposals from DW subproblems ... Keywords: Approximation of the master problem, Dantzig-Wolfe decomposition, Equilibrium modeling, Variational inequalities

Emre Elebi, J. David Fuller

2013-11-01T23:59:59.000Z

403

SoftPCM: Enhancing Energy Efficiency and Lifetime of Phase Change Memory in Video Applications via Approximate Write  

Science Conference Proceedings (OSTI)

Modern video applications such as video codecs are memory-intensive. As an emerging non-volatile memory technology, phase change memory (PCM) will benefit video applications due to its high density, low leakage power and superior scalability. However, ... Keywords: Approximate write, data-comparison write, error tolerance, PCM, write endurance

Yuntan Fang; Huawei Li; Xiaowei Li

2012-11-01T23:59:59.000Z

404

LOCFES-NL: a tool for testing nonlinear spatial approximations to neutron transport in plane-parallel geometry  

E-Print Network (OSTI)

The Linear One-cell Functional Experimental Studies (LOCFES) suite of codes provides a user with a means of testing and comparing spatial approximations to the monoenergetic, azimuthally symmetric, steady-state, one dimensional transport equation. Prior to the latest addendum described in this thesis, the structure of the codes in this suite necessitated that the functional form for the volumetric flux values depend linearly on the cell's edge flux and source moments. A user supplied set of coefficients for these terms could then be used to specify any linear spatial approximation. While such linear methods represent the bulk of closure approximations, some methods that permit this dependence to be nonlinear have proven to be very effective as well. This thesis is concerned with an addition (LOCFES-NL) to the Linear One-Cell Experimental Studies (LOCFES) suite of transport codes to include support for nonlinear spatial approximations. This latest addition to the suite lets the user implement any method and evaluate the method's performance on user-supplied problems. For illustration, sample computations compare the nonlinear Exponential Method (EM) of Barbucci and Pasquantonio to the Nonlinear Characteristics (NC) Method of Walters and Wareing and to other common linear methods.

Nolen, Steven Douglas

1997-01-01T23:59:59.000Z

405

Soil Carbon Modeling (Mac Post) A. Rothamsted model carbon pools and processes. Their approximate equivalents for the EBIS sample processing  

E-Print Network (OSTI)

Soil Carbon Modeling (Mac Post) A. Rothamsted model carbon pools and processes. Their approximate' soil horizon show that model improvements need to be made to capture observed soil carbon cycling and transport processes. Testing and improvement of soil carbon cycling models is a key anticipated output

406

An iterative algorithm to produce a positive definite correlation matrix from an approximate correlation matrix (with a program user's guide)  

Science Conference Proceedings (OSTI)

This report contains an explanation of an algorithm that, when executed, will operate on any symmetric approximate correlation matrix by iteratively adjusting the eigenvalues of this matrix. The objective of this algorithm is to produce a valid, positive definite, correlation matrix. Also a description of a program (called POSDEF) which implements the algorithm is given.

Iman, R.L.; Davenport, J.M.

1982-06-01T23:59:59.000Z

407

Approximate and efficient methods to assess error fields in spatial gridding with DIVA (Data Interpolating Variational Analysis)  

Science Conference Proceedings (OSTI)

We present new approximate methods to provide error fields for the spatial analysis tool Diva. It is first shown how to replace the costly analysis of a large number of covariance functions by a single analysis for quick error computations. Then ...

Jean-Marie Beckers; Alexander Barth; Charles Troupin; Aida Alvera-Azcrate

408

17Solar Storm Energy and Pie Graphs The pie charts below show approximately how various forms of energy  

E-Print Network (OSTI)

17Solar Storm Energy and Pie Graphs The pie charts below show approximately how various forms of energy are involved in a solar flare. Flares occur when stored magnetic energy is suddenly released. The chart on the left shows how much of this magnetic energy is available for creating a flare (purple

409

Modified Friedmann model in Randers-Finsler space of approximate Berwald type as a possible alternative to dark energy hypothesis  

E-Print Network (OSTI)

Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann model is proposed. It is showed that the accelerated expanding universe is guaranteed by a constrained Randers-Finsler structure without invoking dark energy. The geodesic in Randers-Finsler space is studied. The additional term in the geodesic equation acts as repulsive force against the gravity.

Zhe Chang; Xin Li

2009-01-08T23:59:59.000Z

410

Assessment of effective parameters on dilution using approximate reasoning methods in longwall mining method, Iran coal mines  

E-Print Network (OSTI)

Approximately more than 90% of all coal production in Iranian underground mines is derived directly longwall mining method. Out of seam dilution is one of the essential problems in these mines. Therefore the dilution can impose the additional cost of mining and milling. As a result, recognition of the effective parameters on the dilution has a remarkable role in industry. In this way, this paper has analyzed the influence of 13 parameters (attributed variables) versus the decision attribute (dilution value), so that using two approximate reasoning methods, namely Rough Set Theory (RST) and Self Organizing Neuro- Fuzzy Inference System (SONFIS) the best rules on our collected data sets has been extracted. The other benefit of later methods is to predict new unknown cases. So, the reduced sets (reducts) by RST have been obtained. Therefore the emerged results by utilizing mentioned methods shows that the high sensitive variables are thickness of layer, length of stope, rate of advance, number of miners, type of...

Owladeghaffari, H; Saeedi, G H R

2008-01-01T23:59:59.000Z

411

Test of Fermi Gas Model and Plane-Wave Impulse Approximation Against Electron-Nucleus Scattering Data  

E-Print Network (OSTI)

A widely used relativistic Fermi gas model and plane-wave impulse approximation are tested against electron-nucleus scattering data. Inclusive quasi-elastic cross section are calculated and compared with high-precision data for C, O, and Ca. A dependence of agreement between calculated cross section and data on a momentum transfer is shown. Results for the C(nu_mu,mu) reaction are presented and compared with experimental data of the LSND collaboration.

A. V. Butkevich; S. P. Mikheyev

2005-04-30T23:59:59.000Z

412

Giant resonances in {sup 238}U within the quasiparticle random-phase approximation with the Gogny force  

Science Conference Proceedings (OSTI)

Fully consistent axially-symmetric deformed quasiparticle random-phase approximation (QRPA) calculations have been performed, using the same Gogny D1S effective force for both the Hartree-Fock-Bogolyubov mean field and QRPA matrix. New implementation of this approach leads to the applicability of QRPA to heavy deformed nuclei. Giant resonances and low-energy collective states for monopole, dipole, quadrupole, and octupole modes are predicted for the heavy deformed nucleus {sup 238}U and compared with experimental data.

Peru, S.; Gosselin, G.; Martini, M.; Dupuis, M.; Hilaire, S. [CEA/DAM/DIF, F-91297 Arpajon (France); Devaux, J.-C. [ENSIIE, 1 square de la resistance, F-91025 Evry Cedex (France)

2011-01-15T23:59:59.000Z

413

Magnetic Energy and Helicity Budgets in the Active-Region Solar Corona. I. Linear Force-Free Approximation  

E-Print Network (OSTI)

We self-consistently derive the magnetic energy and relative magnetic helicity budgets of a three-dimensional linear force-free magnetic structure rooted in a lower boundary plane. For the potential magnetic energy we derive a general expression that gives results practically equivalent to those of the magnetic Virial theorem. All magnetic energy and helicity budgets are formulated in terms of surface integrals applied to the lower boundary, thus avoiding computationally intensive three-dimensional magnetic field extrapolations. We analytically and numerically connect our derivations with classical expressions for the magnetic energy and helicity, thus presenting a so-far lacking unified treatment of the energy/helicity budgets in the constant-alpha approximation. Applying our derivations to photospheric vector magnetograms of an eruptive and a noneruptive solar active regions, we find that the most profound quantitative difference between these regions lies in the estimated free magnetic energy and relative magnetic helicity budgets. If this result is verified with a large number of active regions, it will advance our understanding of solar eruptive phenomena. We also find that the constant-alpha approximation gives rise to large uncertainties in the calculation of the free magnetic energy and the relative magnetic helicity. Therefore, care must be exercised when this approximation is applied to photospheric magnetic field observations. Despite its shortcomings, the constant-alpha approximation is adopted here because this study will form the basis of a comprehensive nonlinear force-free description of the energetics and helicity in the active-region solar corona, which is our ultimate objective.

M. K. Georgoulis; Barry J. LaBonte

2007-06-27T23:59:59.000Z

414

Magnetic Energy and Helicity Budgets in the Active-Region Solar Corona. I. Linear Force-Free Approximation  

E-Print Network (OSTI)

We self-consistently derive the magnetic energy and relative magnetic helicity budgets of a three-dimensional linear force-free magnetic structure rooted in a lower boundary plane. For the potential magnetic energy we derive a general expression that gives results practically equivalent to those of the magnetic Virial theorem. All magnetic energy and helicity budgets are formulated in terms of surface integrals applied to the lower boundary, thus avoiding computationally intensive three-dimensional magnetic field extrapolations. We analytically and numerically connect our derivations with classical expressions for the magnetic energy and helicity, thus presenting a so-far lacking unified treatment of the energy/helicity budgets in the constant-alpha approximation. Applying our derivations to photospheric vector magnetograms of an eruptive and a noneruptive solar active regions, we find that the most profound quantitative difference between these regions lies in the estimated free magnetic energy and relative magnetic helicity budgets. If this result is verified with a large number of active regions, it will advance our understanding of solar eruptive phenomena. We also find that the constant-alpha approximation gives rise to large uncertainties in the calculation of the free magnetic energy and the relative magnetic helicity. Therefore, care must be exercised when this approximation is applied to photospheric magnetic field observations. Despite its shortcomings, the constant-alpha approximation is adopted here because this study will form the basis of a comprehensive nonlinear force-free description of the energetics and helicity in the active-region solar corona, which is our ultimate objective.

Manolis K. Georgoulis; Barry J. Labonte

2005-01-01T23:59:59.000Z

415

Search for effects beyond the Born approximation in polarization transfer observables in $\\vec{e}p$ elastic scattering  

SciTech Connect

Intensive theoretical and experimental efforts over the past decade have aimed at explaining the discrepancy between data for the proton electric to magnetic form factor ratio, $G_{E}/G_{M}$, obtained separately from cross section and polarization transfer measurements. One possible explanation for this difference is a two-photon-exchange (TPEX) contribution. In an effort to search for effects beyond the one-photon-exchange or Born approximation, we report measurements of polarization transfer observables in the elastic $H(\\vec{e},e'\\vec{p})$ reaction for three different beam energies at a fixed squared momentum transfer $Q^2 = 2.5$ GeV$^2$, spanning a wide range of the virtual photon polarization parameter, $\\epsilon$. From these measured polarization observables, we have obtained separately the ratio $R$, which equals $\\mu_p G_{E}/G_{M}$ in the Born approximation, and the longitudinal polarization transfer component $P_\\ell$, with statistical and systematic uncertainties of $\\Delta R \\approx \\pm 0.01 \\mbox{(stat)} \\pm 0.013 \\mbox{(syst)}$ and $\\Delta P_\\ell/P^{Born}_{\\ell} \\approx \\pm 0.006 \\mbox{(stat)}\\pm 0.01 \\mbox{(syst)}$. The ratio $R$ is found to be independent of $\\epsilon$ at the 1.5% level, while the $\\epsilon$ dependence of $P_\\ell$ shows an enhancement of $(2.3 \\pm 0.6) %$ relative to the Born approximation at large $\\epsilon$.

Meziane, M; Brash, E J; Jones, M K; Luo, W; Pentchev, L; Perdrisat, C F; Puckett, A J.R.; Punjabi, V; Wesselmann, F R; Ahmidouch, A; Albayrak, I; Aniol, K A; Arrington, J; Asaturyan, A; Ates, O; Baghdasaryan, H; Benmokhtar, F; Bertozzi, W; Bimbot, L; Bosted, P; Boeglin, W; Butuceanu, C; Carter, P; Chernenko, S; Christy, E; Commisso, M; Cornejo, J C; Covrig, S; Danagoulian, S; Daniel, A; Davidenko, A; Day, D; Dhamija, S; Dutta, D; Ent, R; Frullani, S; Fenker, H; Frlez, E; Garibaldi, F; Gaskell, D; Gilad, S; Goncharenko, Y; Hafidi, K; Hamilton, D; Higinbothan, D W; Hinton, W; Horn, T; Hu, B; Huang, J; Huber, G M; Jensen, E; Kang, H; Keppel, C; Khandaker, M; King, P; Kirillov, D; Kohl, M; Kravtsov, V; Kumbartzki, G; Li, Y; Mamyan, V; Margaziotis, D J; Markowitz, P; Marsh, A; Matulenko, Y; Maxwell, J; Mbianda, G; Meekins, D; Melnick, Y; Miller, J; Mkrtchyan, A; Mkrtchyan, H; Moffit, B; Moreno, O; Mulholland, J; Narayan, A; Nuruzzaman,; Nedev, S; Piasetzky, E; Pierce, W; Piskunov, N M; Prok, Y; Ransome, R D; Razin, D S; Reimer, P E; Reinhold, J; Rondon, O; Shabestari, M; Shahinyan, A; Shestermanov, K; Sirca, S; Sitnik, I; Smykov, L; Smith, G; Solovyev, L; Solvignon, P; Subedi, R; Suleiman, R; Tomasi-Gustafsson, E; Vasiliev, A; Vanderhaeghen, M; Veilleux, M; Wojtsekhowski, B B; Wood, S; Ye, Z; Zanevsky, Y; Zhang, X; Zhang, Y; Zheng, X

2011-04-01T23:59:59.000Z

416

Search for effects beyond the Born approximation in polarization transfer observables in $\\vec{e}p$ elastic scattering  

E-Print Network (OSTI)

Intensive theoretical and experimental efforts over the past decade have aimed at explaining the discrepancy between data for the proton electric to magnetic form factor ratio, $G_{E}/G_{M}$, obtained separately from cross section and polarization transfer measurements. One possible explanation for this difference is a two-photon-exchange (TPEX) contribution. In an effort to search for effects beyond the one-photon-exchange or Born approximation, we report measurements of polarization transfer observables in the elastic $H(\\vec{e},e'\\vec{p})$ reaction for three different beam energies at a fixed squared momentum transfer $Q^2 = 2.5$ GeV$^2$, spanning a wide range of the virtual photon polarization parameter, $\\epsilon$. From these measured polarization observables, we have obtained separately the ratio $R$, which equals $\\mu_p G_{E}/G_{M}$ in the Born approximation, and the longitudinal polarization transfer component $P_\\ell$, with statistical and systematic uncertainties of $\\Delta R \\approx \\pm 0.01 \\mbox{(stat)} \\pm 0.013 \\mbox{(syst)}$ and $\\Delta P_\\ell/P^{Born}_{\\ell} \\approx \\pm 0.006 \\mbox{(stat)}\\pm 0.01 \\mbox{(syst)}$. The ratio $R$ is found to be independent of $\\epsilon$ at the 1.5% level, while the $\\epsilon$ dependence of $P_\\ell$ shows an enhancement of $(2.3 \\pm 0.6) %$ relative to the Born approximation at large $\\epsilon$.

M. Meziane; E. J. Brash; R. Gilman; M. K. Jones; W. Luo; L. Pentchev; C. F. Perdrisat; A. J. R. Puckett; V. Punjabi; F. R. Wesselmann; A. Ahmidouch; I. Albayrak; K. A. Aniol; J. Arrington; A. Asaturyan; O. Ates; H. Baghdasaryan; F. Benmokhtar; W. Bertozzi; L. Bimbot; P. Bosted; W. Boeglin; C. Butuceanu; P. Carter; S. Chernenko; E. Christy; M. Commisso; J. C. Cornejo; S. Covrig; S. Danagoulian; A. Daniel; A. Davidenko; D. Day; S. Dhamija; D. Dutta; R. Ent; S. Frullani; H. Fenker; E. Frlez; F. Garibaldi; D. Gaskell; S. Gilad; Y. Goncharenko; K. Hafidi; D. Hamilton; D. W. Higinbotham; W. Hinton; T. Horn; B. Hu; J. Huang; G. M. Huber; E. Jensen; H. Kang; C. Keppel; M. Khandaker; P. King; D. Kirillov; M. Kohl; V. Kravtsov; G. Kumbartzki; Y. Li; V. Mamyan; D. J. Margaziotis; P. Markowitz; A. Marsh; Y. Matulenko; J. Maxwell; G. Mbianda; D. Meekins; Y. Melnik; J. Miller; A. Mkrtchyan; H. Mkrtchyan; B. Moffit; O. Moreno; J. Mulholland; A. Narayan; Nuruzzaman; S. Nedev; E. Piasetzky; W. Pierce; N. M. Piskunov; Y. Prok; R. D. Ransome; D. S. Razin; P. E. Reimer; J. Reinhold; O. Rondon; M. Shabestari; A. Shahinyan; K. Shestermanov; S. Sirca; I. Sitnik; L. Smykov; G. Smith; L. Solovyev; P. Solvignon; R. Subedi; R. Suleiman; E. Tomasi-Gustafsson; A. Vasiliev; M. Vanderhaeghen; M. Veilleux; B. B. Wojtsekhowski; S. Wood; Z. Ye; Y. Zanevsky; X. Zhang; Y. Zhang; X. Zheng; L. Zhu

2010-12-01T23:59:59.000Z

417

Role of deformation on giant resonances within the quasiparticle random-phase approximation and the Gogny force  

SciTech Connect

Fully consistent axially-symmetric-deformed quasiparticle random phase approximation (QRPA) calculations have been performed, in which the same Gogny D1S effective force has been used for both the Hartree-Fock-Bogolyubov mean field and the QRPA approaches. Giant resonances calculated in deformed {sup 26-28}Si and {sup 22-24}Mg nuclei as well as in the spherical {sup 30}Si and {sup 28}Mg isotopes are presented. Theoretical results for isovector-dipole and isoscalar monopole, quadrupole, and octupole responses are presented and the impact of the intrinsic nuclear deformation is discussed.

Peru, S.; Goutte, H. [CEA/DAM-Ile de France, Service de Physique Nucleaire, Bruyeres-le-Chatel, F-91297 Arpajon Cedex (France)

2008-04-15T23:59:59.000Z

418

A faster algorithm for smoothed particle hydrodynamics with radiative transfer in the flux-limited diffusion approximation  

E-Print Network (OSTI)

We describe a new, faster implicit algorithm for solving the radiation hydrodynamics equations in the flux-limited diffusion approximation for smoothed particle hydrodynamics. This improves on the method elucidated in Whitehouse & Bate by using a Gauss-Seidel iterative method rather than iterating over the exchange of energy between pairs of particles. The new algorithm is typically many thousands of times faster than the old one, which will enable more complex problems to be solved. The new algorithm is tested using the same tests performed by Turner & Stone for ZEUS-2D, and repeated by Whitehouse & Bate.

Stuart C. Whitehouse; Matthew R. Bate; Joe J. Monaghan

2005-09-28T23:59:59.000Z

419

Approximating semidefinite packing programs ?  

E-Print Network (OSTI)

Proceedings of the 35th Annual Symposium on Foundations of Computer Science, Washington, DC,. USA, 1994, IEEE Computer Society, pp. 3639.

420

Ontology mapping context & approximation  

E-Print Network (OSTI)

Care Units, different vocab's Want to compare quality of care OLVG-1400: 1400 terms in a flat list used_system, respiratory_system) · aetiology (e.g. virus, poising) · abnormality (e.g. fracture, tumor) · action (e Combine lexical analysis with hierarchical structure 313 suggested matches, around 70 % correct 209

van Harmelen, Frank

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

designed to store approximately ...  

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

each year in the Illinois Basin region. The injected CO 2 is a byproduct from processing corn into fuel-grade ethanol at Archer Daniels Midland Company's (ADM) biofuels plant near...

422

Approximating geodesic tree distance  

Science Conference Proceedings (OSTI)

Billera, Holmes, and Vogtmann introduced an intriguing new phylogenetic tree metric for weighted trees with useful properties related to statistical analysis. However, the best known algorithm for calculating this distance is exponential in the number ... Keywords: Analysis of algorithms, Phylogeny, Tree metric

Nina Amenta; Matthew Godwin; Nicolay Postarnakevich; Katherine St. John

2007-07-01T23:59:59.000Z

423

Some numerical reslts on best uniform polynomial approximation of {chi}{sup {alpha}} on [0,1  

SciTech Connect

Let {alpha} be a positive number, and let E{sub n}(chi{sup {alpha}}; [0,1]) denote the error of best uniform approximation to {chi}{sup {alpha}}, by polynomials of degree at most n, on the interval [0,1]. The Russian mathematician S.N. Bernstein established the existence of a nonnegative constant {Beta}({alpha}) such that {Beta}({alpha}):= {sub n{yields}{infinity}lim(2n){sup 2{alpha}}E{sub n}({chi}{sup {alpha}};[0.1]). In addition, Bernstein showed that {Beta}{alpha} < {Gamma}(2{alpha}){vert_bar}sin(pi}{alpha}){vert_bar}/{pi} ({alpha} > 0) and that {Gamma}(2{alpha}){vert_bar}sin({pi}{alpha}){vert_bar}/{pi} (1{minus}1/2{alpha}{minus}1) < {Beta}({alpha}) ({alpha} > {1/2}), so that the asymptotic behavior of {Beta}({alpha}) is known when {alpha}{yields}{infinity}. Still, the problem of trying to determine {Beta}({alpha}) more precisely, for all {alpha} > 0, is intriguing. To this end, we have rigorously determined the numbers for thirteen values of {alpha}, where these numbers were calculated with a precision of at least 200 significant digits. For each of these thirteen values of {alpha}, Richardson`s extrapolation was applied to the products to obtain estimates of {Beta}({alpha}) to approximately 40 decimal places. Included are graphs of the points ({alpha},{Beta}({alpha})) for the thirteen values of {alpha} that we considered.

Carpenter, A.J.; Varga, R.S.

1992-07-01T23:59:59.000Z

424

Some numerical reslts on best uniform polynomial approximation of {chi}{sup {alpha}} on [0,1  

Science Conference Proceedings (OSTI)

Let {alpha} be a positive number, and let E{sub n}(chi{sup {alpha}}; [0,1]) denote the error of best uniform approximation to {chi}{sup {alpha}}, by polynomials of degree at most n, on the interval [0,1]. The Russian mathematician S.N. Bernstein established the existence of a nonnegative constant {Beta}({alpha}) such that {Beta}({alpha}):= {sub n{yields}{infinity}lim(2n){sup 2{alpha}}E{sub n}({chi}{sup {alpha}};[0.1]). In addition, Bernstein showed that {Beta}{alpha} 0) and that {Gamma}(2{alpha}){vert_bar}sin({pi}{alpha}){vert_bar}/{pi} (1{minus}1/2{alpha}{minus}1) {1/2}), so that the asymptotic behavior of {Beta}({alpha}) is known when {alpha}{yields}{infinity}. Still, the problem of trying to determine {Beta}({alpha}) more precisely, for all {alpha} > 0, is intriguing. To this end, we have rigorously determined the numbers for thirteen values of {alpha}, where these numbers were calculated with a precision of at least 200 significant digits. For each of these thirteen values of {alpha}, Richardson`s extrapolation was applied to the products to obtain estimates of {Beta}({alpha}) to approximately 40 decimal places. Included are graphs of the points ({alpha},{Beta}({alpha})) for the thirteen values of {alpha} that we considered.

Carpenter, A.J.; Varga, R.S.

1992-07-01T23:59:59.000Z

425

Effects of Disorder in Mg1?xTaxB2 Alloys using Coherent-Potential Approximation  

E-Print Network (OSTI)

Using Korringa-Kohn-Rostoker coherent-potential approximation in the atomicsphere approximation (KKR-ASA CPA) method for taking into account the effects of disorder, Gaspari-Gyorffy formalism for calculating the electron-phonon coupling constant ?, and Allen-Dynes equation for calculating Tc, we have studied the variation of Tc in Mg1?xTaxB2 alloys as a function of Ta concentration. Our results show that the Tc decreases with the addition of Ta for upto 40at % and remains essentially zero from 60at % to 80at % of Ta. We also find TaB2 to be superconducting, albeit at a lower temperature. Our analysis shows that the variation in Tc in Mg1?xTaxB2 is mostly dictated by the changes in the B p density of states with the addition of Ta.. The experimental [13] and theoretical [4] efforts aimed at understanding the nature of superconductivity in MgB2 have made substantial progress since the discovery of superconductivity in it [1]. With an enhanced understanding of superconductivity in MgB2, attempts are now being made to understand

P. Jiji; Thomas Joseph; Prabhakar P. Singh

2002-01-01T23:59:59.000Z

426

Yukawa-field approximation of electrostatic free energy and dielectric boundary force This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network (OSTI)

Yukawa-field approximation of electrostatic free energy and dielectric boundary force This article.1088/0951-7715/24/11/011 Yukawa-field approximation of electrostatic free energy and dielectric boundary force Hsiao-Bing Cheng1. The electrostatic free energy determines the dielectric boundary force that in turn influences crucially

Li, Bo

427

A finite-element approximation of a quasi-magnetostatic 3D eddy current model by fractional-step A-? scheme  

Science Conference Proceedings (OSTI)

We propose in this paper a fractional-step A-@j scheme for a quasi-magnetostatic 3D eddy current model by means of finite-element approximations. Bounds for continuous and discrete error in finite time are given, and it is verified that provided the ... Keywords: Eddy current problem, Error estimates, Finite-element approximation, Fractional-step A-? scheme

Changfeng Ma

2004-02-01T23:59:59.000Z

428

Coarse-graining stochastic biochemical networks: quasi-stationary approximation and fast simulations using a stochastic path integral technique  

E-Print Network (OSTI)

We propose a universal approach for analysis and fast simulations of stiff stochastic biochemical kinetics networks, which rests on elimination of fast chemical species without a loss of information about mesoscopic, non-Poissonian fluctuations of the slow ones. Our approach, which is similar to the Born-Oppenheimer approximation in quantum mechanics, follows from the stochastic path integral representation of the full counting statistics of reaction events (also known as the cumulant generating function). In applications with a small number of chemical reactions, this approach produces analytical expressions for moments of chemical fluxes between slow variables. This allows for a low-dimensional, interpretable representation of the biochemical system, that can be used for coarse-grained numerical simulation schemes with a small computational complexity and yet high accuracy. As an example, we consider a chain of biochemical reactions, derive its coarse-grained description, and show that the Gillespie simulat...

Sinitsyn, N A; Nemenman, Ilya

2009-01-01T23:59:59.000Z

429

Boundary Ring: a way to construct approximate NG solutions with polygon boundary conditions: I. Z_n-symmetric configurations  

E-Print Network (OSTI)

We describe an algebro-geometric construction of polygon-bounded minimal surfaces in ADS_5, based on consideration of what we call the "boundary ring" of polynomials. The first non-trivial example of the Nambu-Goto (NG) solutions for Z_6-symmetric hexagon is considered in some detail. Solutions are represented as power series, of which only the first terms are evaluated. The NG equations leave a number of free parameters (a free function). Boundary conditions, which fix the free parameters, are imposed on truncated series. It is still unclear if explicit analytic formulas can be found in this way, but even approximate solutions, obtained by truncation of power series, can be sufficient to investigate the Alday-Maldacena -- BDS/BHT version of the string/gauge duality.

H. Itoyama; A. Mironov; A. Morozov

2007-12-02T23:59:59.000Z

430

Self-Force in the Radiation Reaction Formula -- Adiabatic Approximation of a Metric Perturbation and an Orbit --  

E-Print Network (OSTI)

We propose a new metric perturbation scheme under a possible constraint of the gauge conditions in which we obtain a physically expected prediction of the orbital evolution caused by the MiSaTaQuWa self-force. In this new scheme of a metric perturbation, an adiabatic approximation is applied to both the metric perturbation and the orbit. As a result, we are able to predict the gravitational evolution of the system in the so-called radiation reaction time scale, which is longer than the dephasing time scale. However, for gravitational wave detection by LISA, this may still be insufficient. We further consider a gauge transformation in this new metric perturbation scheme, and find a special gauge condition with which we can calculate the gravitational waveform of a time scale long enough for gravitational wave detection by LISA.

Yasushi Mino

2005-05-31T23:59:59.000Z

431

Symmetry effects in electrostatic interactions between two arbitrarily charged spherical shells in the Debye-Hckel approximation  

E-Print Network (OSTI)

Inhomogeneous charge distributions have important repercussions on electrostatic interactions in systems of charged particles but are often difficult to examine theoretically. We investigate how electrostatic interactions are influenced by patchy charge distributions exhibiting certain point group symmetries. We derive a general form of the electrostatic interaction energy of two permeable, arbitrarily charged spherical shells in the Debye-H\\"uckel approximation and apply it to the case of particles with icosahedral, octahedral, and tetrahedral inhomogeneous charge distributions. We analyze in detail how charge distribution symmetry modifies the interaction energy and find that local charge inhomogeneities reduce the repulsion of two overall equally charged particles, while sufficient orientational variation in the charge distribution can turn the minimum interaction energy into an attraction. Additionally we show that larger patches and thus lower symmetries and wave numbers result in bigger attraction given the same variation.

Anze Losdorfer Bozic; Rudolf Podgornik

2012-11-22T23:59:59.000Z

432

Testing the accuracy of the Hydro-PM approximation in numerical simulations of the Lyman-alpha forest  

E-Print Network (OSTI)

We implement the hydro-PM (HPM) technique (Gnedin & Hui 1998) in the hydrodynamical simulation code GADGET-II and quantify the differences between this approximate method and full hydrodynamical simulations of the Lyman-alpha forest in a concordance LCDM model. At redshifts z=3 and z=4, the differences between the gas and dark matter (DM) distributions, as measured by the one-point distribution of density fluctuations, the density power spectrum and the flux power spectrum, systematically decrease with increasing resolution of the HPM simulqation. However, reducing these differences to less than a few percent requires a significantly larger number of grid-cells than particles, with a correspondingly larger demand for memory. Significant differences in the flux decrement distribution remain even for very high resolution hydro-PM simulations, particularly at low redshift. At z=2, the differences between the flux power spectra obtained from HPM simulations and full hydrodynamical simulations are generally la...

Viel, M; Springel, V; Viel, Matteo; Haehnelt, Martin G.; Springel, Volker

2006-01-01T23:59:59.000Z

433

The Atomic to Molecular Transition in Galaxies. I: An Analytic Approximation for Photodissociation Fronts in Finite Clouds  

E-Print Network (OSTI)

In this series of papers we study the structure of the atomic to molecular transition in the giant atomic-molecular complexes that are the repositories of most molecular gas in galaxies, with the ultimate goal of attaining a better understanding of what determines galaxies' molecular content. Here we derive an approximate analytic solution for the structure of a photodissociation region (PDR) in a cloud of finite size that is bathed in an external dissociating radiation field. Our solution extends previous work, which with few exceptions has been restricted to the case of a semi-infinite slab illuminated by a unidirectional radiation field. We show that our analytic results compare favorably to exact numerical calculations in this limit. However, our more general geometry provides a more realistic representation than a semi-infinite slab for atomic-molecular complexes exposed to the interstellar radiation field, particularly in environments such as low-metallicity dwarf galaxies where the curvature and finite...

Krumholz, Mark R; Tumlinson, Jason

2008-01-01T23:59:59.000Z

434

Nuclear symmetry potential in the relativistic impulse approximation RID A-2398-2009 RID C-6879-2009  

E-Print Network (OSTI)

Using the relativistic impulse approximation with the Love-Franey NN scattering amplitude developed by Murdock and Horowitz, we investigate the low-energy (100 nuclear symmetry potential in isospin asymmetric nuclear matter. We find that the nuclear symmetry potential at fixed baryon density decreases with increasing nucleon energy. In particular, the nuclear symmetry potential at saturation density changes from positive to negative values at nucleon kinetic energy of about 200 MeV. Furthermore, the obtained energy and density dependence of the nuclear symmetry potential is consistent with those of the isospin- and momentum-dependent MDI interaction with x=0, which has been found to describe reasonably well both the isospin diffusion data from heavy-ion collisions and the empirical neutron-skin thickness of (208)Pb.

Li, Zeng-Hua; Chen, Lie-Wen; Ko, Che Ming; Li, Bao-An; Ma, Hong-Ru.

2006-01-01T23:59:59.000Z

435

Marginal cost of electricity 1980-1995: an approximation based on the cost of new coal and nuclear generating plants  

SciTech Connect

This report presents estimates of the costs of new coal and nuclear base-load generating capacity which is either currently under construction or planned by utilities to meet their load-growth expectations during the period from 1980 to 1995. These capacity cost estimates are used in conjunction with announced plant capacities and commercial-operation dates to develop state-level estimates of busbar costs of electricity. From these projected busbar costs, aggregated estimates of electricity costs at the retail level are developed for DOE Regions. The introductory chapter explains the rationale for using the cost of electricity from base-load plants to approximate the marginal cost of electricity. The next major section of the report outlines the methodology and major assumptions used. This is followed by a detailed description of the empirical analysis, including the equations used for each of the cost components. The fourth section presents the resultant marginal cost estimates.

Nieves, L.A.; Patton, W.P.; Harrer, B.J.; Emery, J.C.

1980-07-01T23:59:59.000Z

436

Testing the accuracy of the Hydro-PM approximation in numerical simulations of the Lyman-alpha forest  

E-Print Network (OSTI)

We implement the hydro-PM (HPM) technique (Gnedin & Hui 1998) in the hydrodynamical simulation code GADGET-II and quantify the differences between this approximate method and full hydrodynamical simulations of the Lyman-alpha forest in a concordance LCDM model. At redshifts z=3 and z=4, the differences between the gas and dark matter (DM) distributions, as measured by the one-point distribution of density fluctuations, the density power spectrum and the flux power spectrum, systematically decrease with increasing resolution of the HPM simulqation. However, reducing these differences to less than a few percent requires a significantly larger number of grid-cells than particles, with a correspondingly larger demand for memory. Significant differences in the flux decrement distribution remain even for very high resolution hydro-PM simulations, particularly at low redshift. At z=2, the differences between the flux power spectra obtained from HPM simulations and full hydrodynamical simulations are generally large and of the order of 20-30 %, and do not decrease with increasing resolution of the HPM simulation. This is due to the presence of large amounts of shock-heated gas, a situation which is not adequately modelled by the HPM approximation. We confirm the results of Gnedin & Hui (1998) that the statistical properties of the flux distribution are discrepant by > 5-20 % when compared to full hydrodynamical simulations. The discrepancies in the flux power spectrum are strongly scale- and redshift-dependent and extend to large scales. Considerable caution is needed in attempts to use calibrated HPM simulations for quantitative predictions of the flux power spectrum and other statistical properties of the Lyman-alpha forest.

Matteo Viel; Martin G. Haehnelt; Volker Springel

2005-04-28T23:59:59.000Z

437

An analysis of lower-dimensional approximations to the scalar dissipation rate using direct numerical simulations of plane jet flames  

SciTech Connect

The difficulty of experimental measurements of the scalar dissipation rate in turbulent flames has required researchers to estimate the true three-dimensional (3D) scalar dissipation rate from one-dimensional (1D) or two-dimensional (2D) gradient measurements. In doing so, some relationship must be assumed between the true values and their lower dimensional approximations. We develop these relationships by assuming a form for the statistics of the gradient vector orientation, which enables several new results to be obtained and the true 3D scalar dissipation PDF to be reconstructed from the lower-dimensional approximations. We use direct numerical simulations (DNS) of turbulent plane jet flames to examine the orientation statistics, and verify our assumptions and final results. We develop and validate new theoretical relationships between the lower-dimensional and true moments of the scalar dissipation PDF assuming a log-normal true PDF. We compare PDFs reconstructed from lower-dimensional gradient projections with the true values and find an excellent agreement for a 2D simulated measurement and also for a 1D simulated measurement perpendicular to the mean flow variations. Comparisons of PDFs of thermal dissipation from DNS with those obtained via reconstruction from 2D experimental measurements show a very close match, indicating this PDF is not unique to a particular flame configuration. We develop a technique to reconstruct the joint PDF of the scalar dissipation and any other scalar, such as chemical species or temperature. Reconstructed conditional means of the hydroxyl mass fraction are compared with the true values and an excellent agreement is obtained.

Chen, Jackie [Sandia National Laboratories (SNL); Sankaran, Ramanan [ORNL; Hawkes, Evatt R [Sandia National Laboratories (SNL)

2009-05-01T23:59:59.000Z

438

EA-1915: Conveyance of Approximately 1,641 Acres of Unimproved Land to the Tri-City Development Council, the Local Community Reuse Organization, Richland, WA  

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

This EA will evaluate the environmental impacts of conveyance of approximately 1,641 acres of unimproved land at DOEs Hanford Site, Richland, Washington to the Tri-City Development Council (TRIDEC), the local community reuse organization (CRO).

439

Rossby Wave Frequencies and Group Velocities for Finite Element and Finite Difference Approximations to the Vorticity-Divergence and the Primitive Forms of the Shallow Water Equations  

Science Conference Proceedings (OSTI)

In this paper Rossby wave frequencies and group velocities are analyzed for various finite element and finite difference approximations to the vorticity-divergence form of the shallow water equations. Also included are finite difference solutions ...

Beny Neta; R. T. Williams

1989-07-01T23:59:59.000Z

440

The Atomic to Molecular Transition in Galaxies. I: An Analytic Approximation for Photodissociation Fronts in Finite Clouds  

E-Print Network (OSTI)

In this series of papers we study the structure of the atomic to molecular transition in the giant atomic-molecular complexes that are the repositories of most molecular gas in galaxies, with the ultimate goal of attaining a better understanding of what determines galaxies' molecular content. Here we derive an approximate analytic solution for the structure of a photodissociation region (PDR) in a cloud of finite size that is bathed in an external dissociating radiation field. Our solution extends previous work, which with few exceptions has been restricted to a one-dimensional treatment of the radiation field. We show that our analytic results compare favorably to exact numerical calculations in the one-dimensional limit. However, our more general geometry provides a more realistic representation than a semi-infinite slab for atomic-molecular complexes exposed to the interstellar radiation field, particularly in environments such as low-metallicity dwarf galaxies where the curvature and finite size of the atomic envelope cannot be neglected. For clouds that are at least 20% molecular we obtain analytic expressions for the molecular fraction in terms of properties of the gas and radiation field that are accurate to tens of percent, while for clouds of lower molecular content we obtain upper limits. As a side benefit, our analysis helps clarify when self-shielding is the dominant process in H_2 formation, and under what circumstances shielding by dust makes a significant contribution.

Mark R. Krumholz; Christopher F. McKee; Jason Tumlinson

2008-05-19T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Dressed-bound-state molecular strong-field approximation: Application to above-threshold ionization of heteronuclear diatomic molecules  

Science Conference Proceedings (OSTI)

The molecular strong-field approximation (MSFA), which includes dressing of the molecular bound state, is introduced and applied to above-threshold ionization of heteronuclear diatomic molecules. Expressions for the laser-induced molecular dipole and polarizability as functions of the laser parameters (intensity and frequency) and molecular parameters [molecular orientation, dipole, and parallel and perpendicular polarizabilities of the highest occupied molecular orbital (HOMO)] are presented. Our previous MSFA theory, which incorporates the rescattering effects, is generalized from homonuclear to heteronuclear diatomic molecules. Angle- and energy-resolved high-order above-threshold ionization spectra of oriented heteronuclear diatomic molecules, exemplified by the carbon monoxide (CO) molecule, exhibit pronounced minima, which can be related to the shape of their HOMO-electron-density distribution. For the CO molecule we have found an analytical condition for the positions of these minima. We have also shown that the effect of the dressing of the HOMO is twofold: (i) the laser-induced Stark shift decreases the ionization yield and (ii) the laser-induced time-dependent dipole and polarizability change the oscillatory structure of the spectra.

Hasovic, E. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, BA-71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Busuladzic, M. [Medical Faculty, University of Sarajevo, Cekalusa 90, BA-71000 Sarajevo (Bosnia and Herzegowina); Becker, W. [Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, BA-71000 Sarajevo (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, DE-12489 Berlin (Germany); Academy of Sciences and Arts of Bosnia and Herzegovina, Bistrik 7, BA-71000 Sarajevo (Bosnia and Herzegowina)

2011-12-15T23:59:59.000Z

442

A Finite-Difference Numerical Method for Onsager's Pancake Approximation for Fluid Flow in a Gas Centrifuge  

SciTech Connect

Gas centrifuges exhibit very complex flows. Within the centrifuge there is a rarefied region, a transition region, and a region with an extreme density gradient. The flow moves at hypersonic speeds and shock waves are present. However, the flow is subsonic in the axisymmetric plane. The analysis may be simplified by treating the flow as a perturbation of wheel flow. Wheel flow implies that the fluid is moving as a solid body. With the very large pressure gradient, the majority of the fluid is located very close to the rotor wall and moves at an azimuthal velocity proportional to its distance from the rotor wall; there is no slipping in the azimuthal plane. The fluid can be modeled as incompressible and subsonic in the axisymmetric plane. By treating the centrifuge as long, end effects can be appropriately modeled without performing a detailed boundary layer analysis. Onsager's pancake approximation is used to construct a simulation to model fluid flow in a gas centrifuge. The governing 6th order partial differential equation is broken down into an equivalent coupled system of three equations and then solved numerically. In addition to a discussion on the baseline solution, known problems and future work possibilities are presented.

de Stadler, M; Chand, K

2007-11-12T23:59:59.000Z

443

Electronic structure and the local electroneutrality level of SiC polytypes from quasiparticle calculations within the GW approximation  

SciTech Connect

The most important interband transitions and the local charge neutrality level (CNL) in silicon carbide polytypes 3C-SiC and nH-SiC (n = 2-8) are calculated using the GW approximation for the self energy of quasiparticles. The calculated values of band gap E{sub g} for various polytypes fall in the range 2.38 eV (3C-SiC)-3.33 eV (2H-SiC) and are very close to the experimental data (2.42-3.33 eV). The quasiparticle corrections to E{sub g} determined by DFT-LDA calculations (about 1.1 eV) are almost independent of the crystal structure of a polytype. The positions of CNL in various polytypes are found to be almost the same, and the change in CNL correlates weakly with the change in E{sub g}, which increases with the hexagonality of SiC. The calculated value of CNL varies from 1.74 eV in polytype 3C-SiC to 1.81 eV in 4H-SiC.

Brudnyi, V. N., E-mail: brudnyi@mail.tsu.ru [Tomsk State University (Russian Federation); Kosobutsky, A. V. [Kemerovo State University (Russian Federation)

2012-06-15T23:59:59.000Z

444

Interpretation of ES, CS, and IOS approximations within a translational-internal coupling scheme. II. Application to atom--diatom kinetic cross sections  

SciTech Connect

ES, CS, and IOS approximations to atom--diatom kinetic cross sections are derived. In doing so, reduced S-matrices in a translational-internal coupling scheme are stressed. This entails the insertion of recently obtained approximate reduced S-matrices in the translational-internal coupling scheme into previously derived general expressions for the kinetic cross sections. Of special interest is the structure (rotational j quantum number dependence) of the kinetic cross sections associated with the Senftleben Beenakker effects and of pure internal state relaxation phenomena. The viscomagnetic effect is used as an illustrative example. It is found in particular that there is a great similarity of structure between the energy sudden (and IOS) approximation and the previously derived distorted wave Born results.

Coombe, D.A.; Snider, R.F.

1980-02-15T23:59:59.000Z

445

Summary of Time Period-Based and Other Approximation Methods for Determining the Capacity Value of Wind and Solar in the United States: September 2010 - February 2012  

DOE Green Energy (OSTI)

This paper updates previous work that describes time period-based and other approximation methods for estimating the capacity value of wind power and extends it to include solar power. The paper summarizes various methods presented in utility integrated resource plans, regional transmission organization methodologies, regional stakeholder initiatives, regulatory proceedings, and academic and industry studies. Time period-based approximation methods typically measure the contribution of a wind or solar plant at the time of system peak - sometimes over a period of months or the average of multiple years.

Rogers, J.; Porter, K.

2012-03-01T23:59:59.000Z

446

A Two-Scale Approximation for Efficient Representation of Nonlinear Energy Transfers in a Wind Wave Spectrum. Part I: Theoretical Development  

Science Conference Proceedings (OSTI)

A new method for estimating the transfer rates in wind wave spectra is derived and tested, based on a two-scale approximation (TSA) to the total integral for quadruplet wavewave interactions. Comparisons of this new estimation method to the full ...

Donald T. Resio; William Perrie

2008-12-01T23:59:59.000Z

447

A Two-Scale Approximation for Efficient Representation of Nonlinear Energy Transfers in a Wind Wave Spectrum. Part II: Application to Observed Wave Spectra  

Science Conference Proceedings (OSTI)

In Part I of this series, a new method for estimating nonlinear transfer rates in wind waves, based on a two-scale approximation (TSA) to the full Boltzmann integral (FBI) for quadruplet wavewave interactions, was presented, and this new method ...

William Perrie; Donald T. Resio

2009-10-01T23:59:59.000Z

448

On November 2, 2006, approximately 60 people gathered at the University of Idaho to discuss the potential uses for Smart Signals traffic controller technology,  

E-Print Network (OSTI)

On November 2, 2006, approximately 60 people gathered at the University of Idaho to discuss of Transportation (USDOT) grant, engineers from the University of Idaho's National Institute of Advanced was developed, and it won awards at the University of Idaho Engineering Expo. The Smart Signals workshop in No

Kyte, Michael

449

Approximation of lateral distribution of atmospheric Cherenkov light at different observation levels for different primary particles. Applications for cosmic ray studies  

E-Print Network (OSTI)

This work summarizes the results presented at 29th International Cosmic Ray Conference in Pune India. Generally the aim of this work is to obtain the lateral distribution of the atmospheric Cherenkov light in extensive air showers produced by different primary particles in wide energy range and at several observation levels and to fit the obtained lateral distributions. Using one large detector and partially modified CORSIKA code version are obtained the lateral distributions of Cherenkov light flux densities at several observation levels for different particle primaries precisely at 536 g/cm2 Chacaltaya, 700 g/cm2 Moussala and 875 g/cm2 Kartalska field observation levels for hadronic primaries and gamma quanta in the energy range 1011 eV-1016 eV. On the basis of the solution of over-determined inverse problem the approximation of these distributions is obtained. The same model function for all the primaries is used and for the different observation levels. The different model parameters for the different primaries and levels are obtained. The approximations are compared with polynomial approximation obtained with different method. Both approximations are used for detector efficiency estimation for the different experiments in preparation and estimation of the accuracy of the reconstruction techniques. At the same time inclined showers up to 30 degrees zenith angle are studied at Chacaltaya observation level. The obtained lateral distributions of vertical showers are compared with vertical showers model and the previously obtained approximation. This permits to adjust the reconstruction strategy and to study the model parameters behavior.

Alexander Mishev; Strashimir Mavrodiev; Jordan Stamenov

2005-11-29T23:59:59.000Z

450

CY 2011 Annual Workforce Analysis and Staffing Plan Report - NNSA HQ  

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

1 1 Reporting Office: NNSA NA-40 Section One - Current Mission (s) of the Organization and Potential Changes 1. The Office of Emergency Operations (NA-40) administers and directs DOE and NNSA programs for emergency response capabilities to ensure availability and viability to respond to emergencies at DOE and NNSA facilities and field sites, and to nuclear and radiological emergencies within the United States and abroad. NA-40 is also responsible for the development of Departmental policy and guidance, technical assistance, and supporting implementation of emergency management planning, preparedness, readiness assurance, and response activities within DOE and NNSA. Additionally, NA-40 implements Program Secretarial Officer (PSO) responsibilities for Emergency

451

CY 2012 Annual Workforce Analysis and Staffing Plan - Chief of Nuclear Safety  

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

2 2 Reporting Office: Chief of Nuclear Safety . Section One: Current Mission(s) of the Organization and Potential Changes Revision 2 of U.S. Department of Energy Implementation Plan for DNFSB Recommendation 2004-1 established the seven core CTA responsibilities. The Office of the Chief of Nuclear Safety (CNS) performs to following functions in support of the CTA meeting these responsibilities: 1. Nuclear Safety Requirement Concurrence and Exemption * Concur with the determination of the applicability of DOE directives involving nuclear safety included in Energy and Science contracts pursuant to Department of Energy Acquisition Regulation (DEAR), 48 CFR 970.5204-2, Laws, regulations, and DOE directives, item (b). * Concur with nuclear safety requirements included in Energy and Science contracts pursuant to

452

SF 2730-NCB;NAME CHANGE REQUEST FOR BADGE OFFICE AND STAFFING  

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

2730-NCB (02-2011) 2730-NCB (02-2011) Supersedes 12-2010 Version INSTRUCTIONS & INFORMATION The purpose of this form is to report a name change related to marriage, divorce, or legal name change. This form will be used to: * Update your clearance file with DOE (if applicable) * Issue you a new badge, * Update your Sandia Human Resources, Benefits and Health Services records INDIVIDUAL DOE REPORTING REQUIREMENTS (Personnel Security) Name Change Uncleared personnel may report a legal name change at any time. Clearance holders and personnel in process for a security

453

CY 2011 Annual Workforce Analysis and Staffing Plan - Chief of Nuclear Safety  

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

1 1 Reporting Office: Chief of Nuclear Safety . Section One: Current Mission(s) of the Organization and Potential Changes Revision 2 of U.S. Department of Energy Implementation Plan for DNFSB Recommendation 2004-1 established the seven core CTA responsibilities. The Office of the Chief of Nuclear Safety (CNS) performs to following functions in support of the CTA meeting these responsibilities: 1. Nuclear Safety Requirement Concurrence and Exemption * Concur with the determination of the applicability of DOE directives involving nuclear safety included in Energy and Science contracts pursuant to Department of Energy Acquisition Regulation (DEAR), 48 CFR 970.5204-2, Laws, regulations, and DOE directives, item (b). * Concur with nuclear safety requirements included in Energy and Science contracts pursuant to

454

2012 Annual Workforce Analysis and Staffing Plan Report - NNSA NA-40  

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

2 2 Reporting Office: NNSA NA-40 Section One - Current Mission (s) of the Organization and Potential Changes. 1. The Office of Emergency Operations (NA-40) administers and directs DOE and NNSA programs for emergency response capabilities to ensure availability and viability to respond to emergencies at DOE and NNSA facilities and field sites, and to nuclear and radiological emergencies within the United States and abroad. NA-40 is also responsible for the development of Departmental policy and guidance, technical assistance, and supporting implementation of emergency management planning, preparedness, readiness assurance, and response activities within DOE and NNSA. 2. NA-40 has no nuclear or radiological facilities under its cognizance; however,

455

Cost-effectiveness of recommended nurse staffing levels for short-stay skilled nursing facility patients  

E-Print Network (OSTI)

Anonymous: Employer Costs for Employee Compensation--BioMed Central Open Access Cost-effectiveness of recommendeddiagnoses. However, the cost-effectiveness of increasing

Ganz, David A; Simmons, Sandra F; Schnelle, John F

2005-01-01T23:59:59.000Z

456

Effective 07/2010 Questions about this form? Contact HR Staffing &  

E-Print Network (OSTI)

/ Treatments · Maiden Name · Bankruptcy / Wage Garnishing · Workers' Compensation Claims · Number / Ages

Butler, Laurie J.

457

Effective 07/2010 Questions about this form? Contact HR Staffing & Recruitment  

E-Print Network (OSTI)

· Hospitalizations / Medications / Treatments · Maiden Name · Bankruptcy / Wage Garnishing · Workers' Compensation

Butler, Laurie J.

458

NUMBER: STAF 7.04 SECTION: Student Affairs and Academic Support  

E-Print Network (OSTI)

in place a Disaster Plan which is fully integrated with and supports the University's response to disasters are terminated when a University response to a disaster or other detrimental event is activated. 3. The Student disaster readiness and response responsibilities. #12;B. Unusual Health Situations 1. Unusual health

Almor, Amit

459

DOE G 413.3-19 Admin Chg 1, Staffing Guide for Project Management  

Directives, Delegations, and Requirements

This Guide provides an approach to determining the appropriate level and type of federal personnel needed to effectively plan, direct, and oversee project ...

2011-10-12T23:59:59.000Z

460

Symmetry-adapted distributed approximating functionals: Theory and application to the ro-vibrational states of H{sub 3}{sup +}  

SciTech Connect

Symmetry-adapted Distributed Approximating Functionals (SADAFs) are derived and used to obtain a coordinate representation for the {und A}diabatically Adjusting {und P}rincipal Axis {und H}yperspherical (APH) coordinates kinetic energy operator. The resulting expressions are tested by computing (J=0) ro-vibrational states for the well-studied H{sub 3}{sup +} molecular ion system, by iterative diagonalization of the Hamiltonian matrix using the Arnoldi procedure. The SADAF representation and APH coordinate system are found to be computationally robust and accurate. {copyright} {ital 1999 American Institute of Physics.}

Iyengar, S.S. [Department of Chemistry, University of Houston, Houston, Texas 77204-5641 (United States); Parker, G.A. [Department of Physics, University of Oklahoma, Norman, Oklahoma (United States); Kouri, D.J. [Department of Chemistry and Department of Physics, University of Houston, Houston, Texas 77204-5641 (United States); Hoffman, D.K. [Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)

1999-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Greedy approximation in convex optimization  

E-Print Network (OSTI)

Jun 2, 2012 ... In optimization theory an energy function E(x) is given and we should find ..... of matrices with nuclear norm not exceeding 1. We are interested...

462

CONVERGENT NETWORK APPROXIMATION FOR THE ...  

E-Print Network (OSTI)

The Continuous Length-Constrained Minimum Cost Path Problem (C- .... estimator which gives an unbiased estimate of the path length on the actual underlying.

463

1 Approximate Diagonalization (version 20)  

E-Print Network (OSTI)

Let A be a non-self-adjoint n n matrix and suppose that one wants to evaluate x = f(A)b or solve f(A)x = b for a large number of different analytic functions f rapidly, without caring too much about high accuracy. If A is diagonalizable, i.e. A: = SDS ?1 where D is diagonal, then one can solve the first problem by

E B Davies

2006-01-01T23:59:59.000Z

464

S?paration, Relaxation, Approximation  

E-Print Network (OSTI)

... machine-produit ne soient. telles que les artes correspondantes se croisent. Si l'on num?rote les sommets de. haut en bas, c'est le cas des artes: (v. 2;v. 0.

465

PIECEWISE QUADRATIC APPROXIMATIONS IN CONVEX ...  

E-Print Network (OSTI)

seed to the random number generator. Results of .... About Lagrangian Methods in Integer Optimization, Annals of Operations Research,. 139 (2005) ... General Ramp Contraints, International Journal of Electrical Power and Energy Systems,.

466

Approximation Algorithms for Covering Problems  

E-Print Network (OSTI)

change. Then heads(w) does steps in order of decreasing t Sw in a particular order; and tails(w) does just one step forAlg. 8) does the constraints in either order and chooses ?

Koufogiannakis, Christos

2009-01-01T23:59:59.000Z

467

Fast alogorithms for Bayesian uncertainty quantification in large-scale linear inverse problems based on low-rank partial Hessian approximations  

SciTech Connect

We consider the problem of estimating the uncertainty in large-scale linear statistical inverse problems with high-dimensional parameter spaces within the framework of Bayesian inference. When the noise and prior probability densities are Gaussian, the solution to the inverse problem is also Gaussian, and is thus characterized by the mean and covariance matrix of the posterior probability density. Unfortunately, explicitly computing the posterior covariance matrix requires as many forward solutions as there are parameters, and is thus prohibitive when the forward problem is expensive and the parameter dimension is large. However, for many ill-posed inverse problems, the Hessian matrix of the data misfit term has a spectrum that collapses rapidly to zero. We present a fast method for computation of an approximation to the posterior covariance that exploits the lowrank structure of the preconditioned (by the prior covariance) Hessian of the data misfit. Analysis of an infinite-dimensional model convection-diffusion problem, and numerical experiments on large-scale 3D convection-diffusion inverse problems with up to 1.5 million parameters, demonstrate that the number of forward PDE solves required for an accurate low-rank approximation is independent of the problem dimension. This permits scalable estimation of the uncertainty in large-scale ill-posed linear inverse problems at a small multiple (independent of the problem dimension) of the cost of solving the forward problem.

Akcelik, Volkan [ORNL; Flath, Pearl [University of Texas, Austin; Ghattas, Omar [University of Texas, Austin; Hill, Judith C [ORNL; Van Bloemen Waanders, Bart [Sandia National Laboratories (SNL); Wilcox, Lucas [University of Texas, Austin

2011-01-01T23:59:59.000Z

468

Magnetic state of K0.8Fe1.6Se2 from a five-orbital Hubbard model in the Hartree-Fock approximation  

SciTech Connect

Motivated by the recent discovery of Fe-based superconductors close to an antiferromagnetic insulator in the experimental phase diagram, here the five-orbital Hubbard model (without lattice distortions) is studied using the real-space Hartree-Fock approximation, employing a 10 10 Fe cluster with Fe vacancies in a5 5 pattern. Varying the Hubbard and Hund couplings, and at electronic density n = 6.0, the phase diagram contains an insulating state with the same spin pattern as observed experimentally, involving 2 2 ferromagnetic plaquettes coupled with one another antiferromagnetically. The presence of local ferromagnetic tendencies is in qualitative agreement with Lanczos results for the three-orbital model also reported here. The magnetic moment 3 B /Fe is in good agreement with experiments. Several other phases are also stabilized in the phase diagram, in agreement with recent calculations using phenomenological models.

Luo, Qinlong [ORNL; Nicholson, Andrew D [ORNL; Riera, J. A. [Universidad Nacional de Rosario; Yao, Dao-Xin [Sun Yat-Sen University, Guangzhou, China; Moreo, Adriana [ORNL; Dagotto, Elbio R [ORNL

2011-01-01T23:59:59.000Z

469

Boundary Ring or a Way to Construct Approximate NG Solutions with Polygon Boundary Conditions. II. Polygons which admit an inscribed circle  

E-Print Network (OSTI)

We further develop the formalism of arXiv:0712.0159 for approximate solution of Nambu-Goto (NG) equations with polygon conditions in AdS backgrounds, needed in modern studies of the string/gauge duality. Inscribed circle condition is preserved, which leaves only one unknown function y_0(y_1,y_2) to solve for, what considerably simplifies our presentation. The problem is to find a delicate balance -- if not exact match -- between two different structures: NG equation -- a non-linear deformation of Laplace equation with solutions non-linearly deviating from holomorphic functions, -- and the boundary ring, associated with polygons made from null segments in Minkovski space. We provide more details about the theory of these structures and suggest an extended class of functions to be used at the next stage of Alday-Maldacena program: evaluation of regularized NG actions.

H. Itoyama; A. Morozov

2007-12-14T23:59:59.000Z

470

Technique for information retrieval using enhanced latent semantic analysis generating rank approximation matrix by factorizing the weighted morpheme-by-document matrix  

SciTech Connect

A technique for information retrieval includes parsing a corpus to identify a number of wordform instances within each document of the corpus. A weighted morpheme-by-document matrix is generated based at least in part on the number of wordform instances within each document of the corpus and based at least in part on a weighting function. The weighted morpheme-by-document matrix separately enumerates instances of stems and affixes. Additionally or alternatively, a term-by-term alignment matrix may be generated based at least in part on the number of wordform instances within each document of the corpus. At least one lower rank approximation matrix is generated by factorizing the weighted morpheme-by-document matrix and/or the term-by-term alignment matrix.

Chew, Peter A; Bader, Brett W

2012-10-16T23:59:59.000Z

471

Handbook for quick cost estimates. A method for developing quick approximate estimates of costs for generic actions for nuclear power plants  

Science Conference Proceedings (OSTI)

This document is a supplement to a ''Handbook for Cost Estimating'' (NUREG/CR-3971) and provides specific guidance for developing ''quick'' approximate estimates of the cost of implementing generic regulatory requirements for nuclear power plants. A method is presented for relating the known construction costs for new nuclear power plants (as contained in the Energy Economic Data Base) to the cost of performing similar work, on a back-fit basis, at existing plants. Cost factors are presented to account for variations in such important cost areas as construction labor productivity, engineering and quality assurance, replacement energy, reworking of existing features, and regional variations in the cost of materials and labor. Other cost categories addressed in this handbook include those for changes in plant operating personnel and plant documents, licensee costs, NRC costs, and costs for other government agencies. Data sheets, worksheets, and appropriate cost algorithms are included to guide the user through preparation of rough estimates. A sample estimate is prepared using the method and the estimating tools provided.

Ball, J.R.

1986-04-01T23:59:59.000Z

472

Low-energy dipole excitations in neon isotopes and N=16 isotones within the quasiparticle random-phase approximation and the Gogny force  

SciTech Connect

Low-energy dipole excitations in neon isotopes and N=16 isotones are calculated with a fully consistent axially-symmetric-deformed quasiparticle random phase approximation (QRPA) approach based on Hartree-Fock-Bogolyubov (HFB) states. The same Gogny D1S effective force has been used both in HFB and QRPA calculations. The microscopical structure of these low-lying resonances, as well as the behavior of proton and neutron transition densities, are investigated in order to determine the isoscalar or isovector nature of the excitations. It is found that the N=16 isotones {sup 24}O, {sup 26}Ne, {sup 28}Mg, and {sup 30}Si are characterized by a similar behavior. The occupation of the 2s{sub 1/2} neutron orbit turns out to be crucial, leading to nontrivial transition densities and to small but finite collectivity. Some low-lying dipole excitations of {sup 28}Ne and {sup 30}Ne, characterized by transitions involving the {nu}1d{sub 3/2} state, present a more collective behavior and isoscalar transition densities. A collective proton low-lying excitation is identified in the {sup 18}Ne nucleus.

Martini, M.; Peru, S.; Dupuis, M. [CEA/DAM/DIF, F-91297 Arpajon (France)

2011-03-15T23:59:59.000Z

473

Application of the static fluctuation approximation to the computation of the thermodynamic properties of an interacting trapped two-dimensional hard-sphere Bose gas  

SciTech Connect

The static fluctuation approximation (SFA) is applied to compute the thermodynamic properties of a trapped two-dimensional (2D) interacting hard-sphere (HS) Bose gas in the weakly and strongly interacting regime. A mean-field approach involving a variational wave function is used to compute the mean-field energy as a function of temperature for each harmonic oscillator (HO) state plugged into the SFA technique. In the variational approach, a parameter {alpha} is introduced into the harmonic oscillator wave function in order to take into account the changes in the width when the repulsive interactions between the bosons are increased. In the weakly interacting regime, below the critical temperature, the total energy of all HO states (evaluated by our model) matches the noninteracting result very well. However, beyond the critical temperature, we 'fit' our energies to the classical limit for 2D bosons in a trap by using a suitably proposed weighting function. We compare our results to earlier results of mean-field theory. Further, we evaluate the density matrix arising from correlations between the HO orbitals.

Sakhel, Asaad R. [Al-Balqa Applied University, Faculty of Engineering Technology, Amman 11134 (Jordan); Qashou, Saleem I. [Department of Physics, Faculty of Science and Information Technology, Zarqa Private University, Zarqa 13132 (Jordan); Sakhel, Roger R. [Department of Basic Sciences, Faculty of Information Technology, Al-Isra University, Amman 11622 (Jordan); Ghassib, Humam B. [Department of Physics, University of Jordan, Amman (Jordan)

2010-12-15T23:59:59.000Z

474

A Second Examination of Fragments of Unirradiated and Irradiated CANDU Fuel, and Irradiated LWR Fuel, Oxidized in Air at 130 Degrees Centigrade and 170 Degrees Centigrade for Approximately One Thousand Days  

Science Conference Proceedings (OSTI)

Thisreport documents the examination of unclad fragments of unirradiated CANDU fuel, and irradiated LWR fuel, after approximately 2.8 years of oxidation in air at 130 degrees Centigrade and 170 degrees Centigrade. During oxidation, the various fuel specimens were isolated in separate vials, which were designed to permit free access of air, while preventing cross-contamination. Two specimens of each fuel type were recovered for examination from each experiment. The irradiated fuel specimens were weighed a...

1999-10-01T23:59:59.000Z

475

Results of charpy V-notch impact testing of structural steel specimens irradiated at {approximately}30{degrees}C to 1 x 10{sup 16} neutrons/cm{sup 2} in a commercial reactor cavity  

SciTech Connect

A capsule containing Charpy V-notch (CVN) and mini-tensile specimens was irradiated at {approximately} 30{degrees}C ({approximately} 85{degrees}F) in the cavity of a commercial nuclear power plant to a fluence of 1 x 10{sup 16} neutrons/cm{sup 2} (> 1MeV). The capsule included six CVN impact specimens of archival High Flux Isotope Reactor A212 grade B ferritic steel and five CVN impact specimens of a well-studied A36 structural steel. This irradiation was part of the ongoing study of neutron-induced damage effects at the low temperature and flux experienced by reactor supports. The plant operators shut down the plant before the planned exposure was reached. The exposure of these specimens produced no significant irradiation-induced embrittlement. Of interest were the data on unirradiated specimens in the L-T orientation machined from a single plate of A36 structural steel, which is the same specification for the structural steel used in some reactor supports. The average CVN energy of five unirradiated specimens obtained from one region of the plate and tested at room temperature was {approximately} 99 J, while the energy of 11 unirradiated specimens from other locations of the same plate was 45 J, a difference of {approximately} 220%. The CVN impact energies for all 18 specimens ranged from a low of 32 J to a high of 111 J. Moreover, it appears that the University of Kansas CVN impact energy data of the unirradiated specimens at the 100-J level are shifted toward higher temperatures by about 20 K. The results were an example of the extent of scatter possible in CVN impact testing. Generic values for the CVN impact energy of A36 should be used with caution in critical applications.

Iskander, S.K.; Stoller, R.E.

1997-04-01T23:59:59.000Z

476

Comparison of two and three spatial dimensional solutions of a parabolic approximation of the wave equation at ocean?basin scales in the presence of internal waves: 200250 Hz.  

Science Conference Proceedings (OSTI)

Numerical solutions are given for a parabolic approximation to the acoustic waveequation at 200 and 250 Hz in two and three spatial dimensions to determine if azimuthal coupling in the horizontal coordinate significantly affects horizontal correlation in the presence of internal gravity waves in the sea. Coupling is a small effect at distances of 4000 km or less. This implies that accurate solutions are possible using computations from uncoupled vertical slices. Shapes of horizontal correlation are not far from shapes given by several theories. Estimates of horizontal correlation at 4000 km and 200 and 250 Hz are about 0.4 and 0.3 km

John Spiesberger

2011-01-01T23:59:59.000Z

477

Approximate parallel simulation of web search engines  

Science Conference Proceedings (OSTI)

Large scale Web search engines are complex and highly optimized systems devised to operate on dedicated clusters of processors. Any, even a small, gain in performance is beneficial to economical operation given the large amount of hardware resources ... Keywords: discrete event simulation, parallel computation

Mauricio Marin, Veronica Gil-Costa, Carolina Bonacic, Roberto Solar

2013-05-01T23:59:59.000Z

478

Discrete Modeling via Function Approximation Methods: Bridging ...  

Science Conference Proceedings (OSTI)

The Monte-Carlo method requires energy computations at each time step in order to compute ... Figure B. The integration of thin-film generation and process modeling. ... Its application to magnet systems is well explored in the literature.

479

Finding Approximate Repetitions under Hamming Distance  

Science Conference Proceedings (OSTI)

The problem of computing tandem repetitions with K possible mismatches is studied. Two main definitions are considered, and for both of them an O(nK log K + S) algorithm is proposed (S the size of the output). ...

Roman M. Kolpakov; Gregory Kucherov

2001-08-01T23:59:59.000Z

480

On approximation by trigonometric Lagrange interpolating ... - CECM  

E-Print Network (OSTI)

Let L2,, 1 $ p Q 00 be the class of real integrable functions of power p and of period Zn ... for z E [0,21r), and extend it to the whole line with period 21r. Evidently...

Note: This page contains sample records for the topic "usd2 staffing approximately" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Mass Conservation and the Anelastic Approximation  

Science Conference Proceedings (OSTI)

Numerical anelastic models solve a diagnostic elliptic equation for the pressure field using derivative boundary conditions. The pressure is therefore determined to within a function proportional to the base-state density field with arbitrary ...

Peter R. Bannon; Jeffrey M. Chagnon; Richard P. James

2006-10-01T23:59:59.000Z

482

Stochastic Approximation Approach to Stochastic Programming  

E-Print Network (OSTI)

... Institute of Technology, Atlanta, Georgia 30332, USA, glan@isye.gatech.edu, ... widely used in stochastic optimization and, due to especially low demand for.

483

Quadratic and higher order Pad? approximants - CECM  

E-Print Network (OSTI)

The foiiowing results , which are fairiy immediate genera] ? izations , indicate .... where R( z) is of degree n-2 in log 2 . Part b] follows .... and Computing Science.

484

Approximation algorithms for stochastic scheduling problems  

E-Print Network (OSTI)

In this dissertation we study a broad class of stochastic scheduling problems characterized by the presence of hard deadline constraints. The input to such a problem is a set of jobs, each with an associated value, processing ...

Dean, Brian C. (Brian Christopher), 1975-

2005-01-01T23:59:59.000Z

485

Nonlinear optimal control: Numerical approximations via moments ...  

E-Print Network (OSTI)

trol problems with all data (differential equation, state and control constraints ... problem (OCP) is a difficult challenge, despite powerfull theoretical tools are...

486

Convex Approximations of Chance Constrained Programs  

E-Print Network (OSTI)

given point is to use Monte-Carlo simulation, and this becomes too costly when ? ...... approach to stochastic programming of heating oil, Management Science,...

487

Symmetric tensor approximation hierarchies for the completely ...  

E-Print Network (OSTI)

Nov 9, 2012 ... +. An n n real symmetric matrix A is called. 1. Wisconsin Institutes for Discovery, University of Wisconsin-Madison. E-mail: hdong6@wisc.edu.

488

Clubbed Binomial Approximation for the Lightbulb Process  

E-Print Network (OSTI)

;2 Larry Goldstein and Aihua Xia Some fundamental properties of Wn, the number of light bulbs on at the end bulbs selected uniformly and independent of the past have their status changed from off to on, or vice versa. With Wn the number of bulbs on at the terminal time n and Cn a suitable clubbed binomial

Goldstein, Larry

489

Approximation of Bayesian Inverse Problems for PDEs  

Science Conference Proceedings (OSTI)

Inverse problems are often ill posed, with solutions that depend sensitively on data. In any numerical approach to the solution of such problems, regularization of some form is needed to counteract the resulting instability. This paper is based on an ... Keywords: Bayesian, Markov chain-Monte Carlo, Stokes flow, data assimilation, inverse problem

S. L. Cotter; M. Dashti; A. M. Stuart

2010-04-01T23:59:59.000Z

490

Separable Concave Optimization Approximately Equals Piecewise ...  

E-Print Network (OSTI)

Jan 13, 2012 ... In Proceedings of the 47th Annual IEEE Symposium on Foundations of Computer Science, pages 677686, Washington, DC, USA, 2006.

491

Coherent approximation of distributed expert assessments  

E-Print Network (OSTI)

Expert judgments of probability and expectation play an integral role in many systems. Financial markets, public policy, medical diagnostics and more rely on the ability of informed experts (both human and machine) to make ...

Jones, Peter B., Ph.D. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

492

Asymptotic Analysis of Sample Average Approximation for ...  

E-Print Network (OSTI)

Feb 23, 2012 ... Department of Mathematics, Harbin Institute of Technology, Harbin, 150001, ... Problem (1.1) has wide applications in communications and...

493

Estimate sequence methods: extensions and approximations  

E-Print Network (OSTI)

Aug 11, 2009 ... The approach of estimate sequence offers an interesting rereading of a ... a strategy for reducing the iteration cost by solving only coarsely...

494

Phase Transitions for Greedy Sparse Approximation Algorithms  

E-Print Network (OSTI)

for Gaussian measurement matrices into requirements on the signal's sparsity level, size and number .... n and does not recover all k-sparse vectors if.

495

Discrete Approximation of Quantum Stochastic Models  

E-Print Network (OSTI)

We develop a general technique for proving convergence of repeated quantum interactions to the solution of a quantum stochastic differential equation. The wide applicability of the method is illustrated in a variety of examples. Our main theorem, which is based on the Trotter-Kato theorem, is not restricted to a specific noise model and does not require boundedness of the limit coefficients.

Luc Bouten; Ramon van Handel

2008-03-31T23:59:59.000Z

496

Efficient Semantic Deduction and Approximate Matching over ...  

Science Conference Proceedings (OSTI)

... c) Redirect: a bidirectional rule based on Wikipedia's redirections between user queries and the title they are redi- rected to (eg Yankee land is ...

2009-02-27T23:59:59.000Z

497

Successive Convex Approximations to Cardinality-Constrained ...  

E-Print Network (OSTI)

Cui et al. (2012) investigated. 3 ... were investigated in Chen et al. ...... In this section, we conduct computational experiments to evaluate the performance of the.

498

APPROXIMATE CONE FACTORIZATIONS AND LIFTS OF ...  

E-Print Network (OSTI)

a lift or extended formulation of C . The standard way to express such a lift is as ... this lift is highly non-robust, and small perturbations of A make the right hand.

499

Optimal Stochastic Approximation Algorithms for Strongly Convex ...  

E-Print Network (OSTI)

optimal rate of convergence for solving strongly convex SCO problems in ... where X is a closed convex set in Euclidean space E, X(x) is a simple convex function with known ..... Note that the notation log has a base of 2 throughout this paper.