National Library of Energy BETA

Sample records for federal computer system

  1. From Federal Computer Week:

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)Forthcoming Upgrades toFreezingHSAFederal Computer Week:

  2. Security Architecture for Federated Mobile Cloud Computing

    E-Print Network [OSTI]

    Xu, Shouhuai

    Security Architecture for Federated Mobile Cloud Computing Shouhuai Xu and E. Paul Ratazzi, federated mobile cloud computing imposes a diverse set of new chal- lenges, especially from a security clouds for security purposes? How should we deal with the tar- geted attackers that attempt to launch

  3. Energy Efficiency Opportunities in Federal High Performance Computing...

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

    Energy Efficiency Opportunities in Federal High Performance Computing Data Centers Energy Efficiency Opportunities in Federal High Performance Computing Data Centers Case study...

  4. Computer Engineering Computer Systems and

    E-Print Network [OSTI]

    Computer Engineering Computer Systems and Electrical Engineering Concentrations MS Graduate Handbook 2014 - 2015 #12;MANUAL OF THE MS DEGREE IN COMPUTER ENGINEERING ARIZONA STATE UNIVERSITY 2014 ­ 2015 Computer Engineering (Computer Systems) graduate degrees please contact: School of Computing

  5. Computer Engineering Computer Systems and

    E-Print Network [OSTI]

    Computer Engineering Computer Systems and Electrical Engineering Concentrations Ph.D. Graduate Handbook 2014 - 2015 #12;MANUAL OF THE PH.D. DEGREE IN COMPUTER ENGINEERING ARIZONA STATE UNIVERSITY 2014 ­ 2015 Computer Engineering (Computer Systems) graduate degrees please contact: School of Computing

  6. Energy Efficiency Opportunities in Federal High Performance Computing...

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

    Case study describes an outline of energy efficiency opportunities in federal high-performance computing data centers. dchpcc.pdf More Documents & Publications Case Study:...

  7. Computer System,

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

    HOW TO APPLY Applications will be accepted JANUARY 5 - FEBRUARY 13, 2016 Computing and Information Technology undegraduate students are encouraged to apply. Must be a U.S....

  8. Recommended Security Controls for Federal Information Systems...

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

    Federal Information Systems and Organizations Note: CNTL NO. Table D2: Security Control Base Lines (Derived From Appendix F) Minimum Requirements: FedRamp Security Controls...

  9. Computer System,

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the following commentsMethodsCompositional6 Computational

  10. computational modeling of biological systems

    E-Print Network [OSTI]

    $author.value

    Faculty. Faculty listing for "computational modeling of biological systems" ... Research Interests: computational modeling of biological systems.

  11. Green Building Certification Systems Requirement for New Federal...

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

    OIRA Comparison Document Green Building Certification Systems Requirement for New Federal Buildings and Major Renovations of Federal Buildings OIRA Comparison Document Document...

  12. GAANN -Computer Systems Security GAANN Computer Systems Security

    E-Print Network [OSTI]

    Alpay, S. Pamir

    GAANN - Computer Systems Security GAANN ­ Computer Systems Security · What is computer systems security? ­ The protection of all aspects of a computer system from unauthorized use · Why is it important is critical October 7, 2009 GAANN ­ Computer Systems Security 1 #12;GAANN - Computer Systems Security

  13. Security Certification & Accreditation of Federal Information Systems A Tutorial

    E-Print Network [OSTI]

    Madisetti, Vijay K.

    Security Certification & Accreditation of Federal Information Systems A Tutorial An Introduction Madisetti, 06/29/2009 Security Certification & Assurance of Federal Information Systems Tutorial Tutorial Outline Objectives & Introduction: C&A Information Security Certification & Accreditation Foundations (as

  14. Green Building Certification Systems Requirement for New Federal...

    Energy Savers [EERE]

    greenblgcert.docx More Documents & Publications EA-1991: Final Environmental Assessment Green Building Certification Systems Requirement for New Federal Buildings and Major...

  15. Computer memory management system

    DOE Patents [OSTI]

    Kirk, III, Whitson John (Greenwood, MO)

    2002-01-01

    A computer memory management system utilizing a memory structure system of "intelligent" pointers in which information related to the use status of the memory structure is designed into the pointer. Through this pointer system, The present invention provides essentially automatic memory management (often referred to as garbage collection) by allowing relationships between objects to have definite memory management behavior by use of coding protocol which describes when relationships should be maintained and when the relationships should be broken. In one aspect, the present invention system allows automatic breaking of strong links to facilitate object garbage collection, coupled with relationship adjectives which define deletion of associated objects. In another aspect, The present invention includes simple-to-use infinite undo/redo functionality in that it has the capability, through a simple function call, to undo all of the changes made to a data model since the previous `valid state` was noted.

  16. Computability, Noncomputability, and Hyperbolic Systems

    E-Print Network [OSTI]

    Graça, Daniel S.

    Computability, Noncomputability, and Hyperbolic Systems Ning Zhong DMS, University of Cincinnati an equilibrium point nor a periodic orbit, is computable. 1 Introduction Dynamical systems are powerful objects: dynamical systems are objects which are inherently very hard to study. Recently, digital computers have been

  17. The New York Convention and the American Federal System

    E-Print Network [OSTI]

    Drahozal, Christopher R.

    2012-01-01

    This article outlines three models of the implementation of arbitration conventions in a federal system to illustrate how the U.S. might have implemented its obligations under the New York Convention Convention, and finds two of the models...

  18. Assessing the Feasibility of Developing a Federated ERP System

    E-Print Network [OSTI]

    Gall, Michael; Bjerre, Mogens; 10.5121/ijmit.2011.3302

    2011-01-01

    In past years ERP Systems have become one of the main components within the corporate IT structure. Several problems exist around implementing and operating these systems within companies. In the literature one can find several studies about the problems arising during the implementation of an ERP system. The main problem areas are around the complexity of ERP systems. One vision to overcome some of these problems is federated ERP. Federated ERP systems are built of components from different vendors, which are distributed within a network. All components act as one single ERP system from the user perspective. The decreased complexity of such a system would require lower installation and maintenance cost. Additional, only the components which are needed to cover the company's business processes would be used. Several theories around this concept exist, but a feasibility assessment of developing a federated ERP system has not been done yet. Based on a literary analysis of existing methods for feasibility studie...

  19. Brochure: Federal Columbia River Power System (FCRPS)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L OBransen Plasma Asher An O2 RFand1120019BringingFederal

  20. Computer Information Systems Association for Computing Machinery (ACM) delivers resources that advance computing as a science

    E-Print Network [OSTI]

    Computer Information Systems Association for Computing Machinery (ACM) delivers resources that advance computing as a science and a profession. ACM provides the computing field's premier Digital

  1. Spin Systems and Computational Complexity

    E-Print Network [OSTI]

    Daniel Gottesman

    2009-11-30

    I give a very brief non-technical introduction to the intersection of the fields of spin systems and computational complexity. The focus is on spin glasses and their relationship to NP-complete problems.

  2. ADVANCED TURBINE SYSTEM FEDERAL ASSISTANCE PROGRAM

    SciTech Connect (OSTI)

    Frank Macri

    2003-10-01

    Rolls-Royce Corporation has completed a cooperative agreement under Department of Energy (DOE) contract DE-FC21-96MC33066 in support of the Advanced Turbine Systems (ATS) program to stimulate industrial power generation markets. This DOE contract was performed during the period of October 1995 to December 2002. This final technical report, which is a program deliverable, describes all associated results obtained during Phases 3A and 3B of the contract. Rolls-Royce Corporation (formerly Allison Engine Company) initially focused on the design and development of a 10-megawatt (MW) high-efficiency industrial gas turbine engine/package concept (termed the 701-K) to meet the specific goals of the ATS program, which included single digit NOx emissions, increased plant efficiency, fuel flexibility, and reduced cost of power (i.e., $/kW). While a detailed design effort and associated component development were successfully accomplished for the 701-K engine, capable of achieving the stated ATS program goals, in 1999 Rolls-Royce changed its focus to developing advanced component technologies for product insertion that would modernize the current fleet of 501-K and 601-K industrial gas turbines. This effort would also help to establish commercial venues for suppliers and designers and assist in involving future advanced technologies in the field of gas turbine engine development. This strategy change was partly driven by the market requirements that suggested a low demand for a 10-MW aeroderivative industrial gas turbine, a change in corporate strategy for aeroderivative gas turbine engine development initiatives, and a consensus that a better return on investment (ROI) could be achieved under the ATS contract by focusing on product improvements and technology insertion for the existing Rolls-Royce small engine industrial gas turbine fleet.

  3. in High Performance Computing Computer System, Cluster, and Networking...

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

    iSSH v. Auditd: Intrusion Detection in High Performance Computing Computer System, Cluster, and Networking Summer Institute David Karns, New Mexico State University Katy Protin,...

  4. Observability and Computability in Physical Systems

    E-Print Network [OSTI]

    Subhash Kak

    2012-06-26

    This paper considers the relevance of the concepts of observability and computability in physical theory. Observability is related to verifiability which is essential for effective computing and as physical systems are computational systems it is important even where explicit computation is not the goal. Specifically, we examine two problems: observability and computability for quantum computing, and remote measurement of time and frequency.

  5. S. van Bakel Computer Systems -Autumn 2013 p.1/306 Computer Systems

    E-Print Network [OSTI]

    van Bakel, Steffen

    Computer Systems S. van Bakel Computer Systems - Autumn 2013 p.1/306 #12;Computer Systems Dr or tutorial) best via email; reply will go (anonymised) back to the whole class. S. van Bakel Computer Systems of the implementation of main OS functions through the operation system Minix. S. van Bakel Computer Systems - Autumn

  6. COMPUTER INFORMATION SYSTEMS Suggested Schedule

    E-Print Network [OSTI]

    Thaxton, Christopher S.

    Sophomore Year ­ 3rd Semester Senior Year ­ 7th Semester *ACC 2100 (must make a "C-" or better) *ECO 2030COMPUTER INFORMATION SYSTEMS 2011-2012 BSBA Suggested Schedule Freshman Year ­ 1st Semester Junior Year ­ 5th Semester *ENG 1000 (must make a "C" or better) UCO 1200 (First Year Seminar) Gen. Ed

  7. Center for High-End Computing Systems

    E-Print Network [OSTI]

    Butt, Ali R.

    /Vision/Goals · " ... world-class computer systems research in the service of high-end computing." · A consortium of CS-aware computing: frameworks for power, energy, and thermal measurement, analysis, and optimization · Performance

  8. Computability in planar dynamical systems Daniel Graca

    E-Print Network [OSTI]

    Lisboa, Universidade Técnica de

    Computability in planar dynamical systems Daniel Gra¸ca DM/FCT, Universidade do Algarve, C undecidable, even for analytic systems and (b) the attractors are semi-computable for stable systems. We also show that the basins of attraction are semi-computable if and only if the system is stable. Keywords

  9. Computer Simulations of charged systems

    E-Print Network [OSTI]

    C. Holm; K. Kremer

    2002-03-26

    In this brief contribution to the Proceedings of the NATO-ASI on ``Electrostatic Effects in Soft Matter and Biophysics'', which took place in Les Houches from Oct. 1-13, 2000, we summarize in short aspects of the simulations methods to study charged systems. After describing some basics of Monte Carlo and Molecular dynamics techniques, we describe a few methods to compute long range interactions in periodic systems. After a brief detour to mean-field models, we describe our results obtained for flexible polyelectrolytes in good and bad solvents. We follow with a description of the inhomogeneity of the counterion distribution around finite chains, and continue then with infinitely long, rodlike systems. The last part is devoted to the phenomenon of overcharging for colloidal particles and its explanation in terms of simple electrostatic arguments.

  10. Accountability in Cloud Computing and Distributed Computer Systems Hongda Xiao

    E-Print Network [OSTI]

    Feigenbaum, Joan

    a mechanism for holding cloud-service providers accountable but also an interesting application of secure be applicable to other aspects of data- center and cloud security. #12;Accountability in Cloud ComputingAbstract Accountability in Cloud Computing and Distributed Computer Systems Hongda Xiao 2014

  11. Computer Architecture and Operating Systems Huffmire, Ted

    E-Print Network [OSTI]

    Computer Architecture and Operating Systems Huffmire, Ted 06/11/2012 Catalog Description: (For non-CS students.) This course provides an overview of basic computer hardware concepts and operating systems; and file management. Future trends in computer hardware and operating systems will be discussed

  12. Introducing Computer Systems from a Programmer's Perspective

    E-Print Network [OSTI]

    Shewchuk, Jonathan

    Introducing Computer Systems from a Programmer's Perspective Randal E. Bryant Carnegie Mellon on a computer. It provides broad coverage of processor operation, compilers, operating systems, and networking these abstractions are implemented on the hardware and software of real computer systems. Our abstractions

  13. Computability and Dynamical Systems: a Perspective

    E-Print Network [OSTI]

    Graça, Daniel S.

    Computability and Dynamical Systems: a Perspective Daniel S. Gra¸ca SQIG - IT and DM In this paper we look at dynamical systems from a computability per- spective. We survey some topics and themes of research for dynamical systems and then see how they can be fitted in a computational frame- work. We

  14. Coordinated Load Management in Peer-to-Peer Coupled Federated Grid Systems

    E-Print Network [OSTI]

    Buyya, Rajkumar

    Coordinated Load Management in Peer-to-Peer Coupled Federated Grid Systems Rajiv Ranjan, Aaron-- This paper proposes a coordinated load manage- ment protocol in Peer-to-Peer (P2P) coupled federated Grid to multiple control domains work together to enable a coordinated federation. The coordinated load management

  15. Computer Information Systems The computer information systems program is designed for students

    E-Print Network [OSTI]

    Miles, Will

    Computer Information Systems The computer information systems program is designed for students who for technology careers that move them into management positions. Computer information systems majors often choose hands-on experience both in and out of the classroom. Computer information systems majors are encouraged

  16. Building a Global Federation System for Climate Change Research: The Earth System Grid Center for Enabling

    E-Print Network [OSTI]

    Chervenak, Ann

    Building a Global Federation System for Climate Change Research: The Earth System Grid Center for the Intergovernmental Panel on Climate Change (IPCC) [2]. Increasingly, climate change research is data intensive@mcs.anl.gov, bernholdtde@ornl.gov Abstract. The recent release of the Intergovernmental Panel on Climate Change (IPCC) 4th

  17. Middleware in Modern High Performance Computing System Architectures

    E-Print Network [OSTI]

    Engelmann, Christian

    Middleware in Modern High Performance Computing System Architectures Christian Engelmann, Hong Ong trend in modern high performance computing (HPC) system architectures employs "lean" compute nodes) continue to reside on compute nodes. Key words: High Performance Computing, Middleware, Lean Compute Node

  18. To Track Federal Loan History: National Student Loan Data System (NSLDS)-To track federal loan history, principal balances, www.nslds.ed.gov

    E-Print Network [OSTI]

    Dennett, Daniel

    To Track Federal Loan History: National Student Loan Data System (NSLDS)- To track federal loan history, principal balances, www.nslds.ed.gov (Need Federal PIN to log in.) Bank of America ACS (800) 835.discover.com/student-loans Department of Education (DOE) ESA/EdFinancial (855) 337-6884 www.edfinancial.com/DL FedLoan Servicing (PHEAA

  19. ELECTRICAL ENGINEERING AND COMPUTER SCIENCE INFORMATION SYSTEMS

    E-Print Network [OSTI]

    Wichmann, Felix

    FACULTY IV ELECTRICAL ENGINEERING AND COMPUTER SCIENCE INFORMATION SYSTEMS MANAGEMENT Master of Science STUDY GUIDE #12;#12;FACULTY IV ELECTRICAL ENGINEERING AND COMPUTER SCIENCE INFORMATION SYSTEMS | INFORMATION SYSTEMS MANAGEMENT Master of Science | Preface by the Dean of Studies 3 Dear Students

  20. Inexpensive computer data-acquisition system

    SciTech Connect (OSTI)

    Galvin, J.E.; Brown, I.G.

    1985-10-01

    A system based on an Apple II+ personal computer is used for on-line monitoring of ion-beam characteristics in accelerator ion source development.

  1. Contract-Based Load Management in Federated Distributed Systems Magdalena Balazinska, Hari Balakrishnan, and Mike Stonebraker

    E-Print Network [OSTI]

    Contract-Based Load Management in Federated Distributed Systems Magdalena Balazinska, Hari://nms.lcs.mit.edu/projects/medusa/ Abstract This paper focuses on load management in loosely- coupled federated distributed systems. We in practice. Our load management mechanism is especially well- suited for distributed stream

  2. ContractBased Load Management in Federated Distributed Systems # Magdalena Balazinska, Hari Balakrishnan, and Mike Stonebraker

    E-Print Network [OSTI]

    Contract­Based Load Management in Federated Distributed Systems # Magdalena Balazinska, Hari://nms.lcs.mit.edu/projects/medusa/ Abstract This paper focuses on load management in loosely­ coupled federated distributed systems. We in practice. Our load management mechanism is especially well­ suited for distributed stream

  3. Federal Automated Information System of Nuclear Material Control and Accounting: Uniform System of Reporting Documents

    SciTech Connect (OSTI)

    Pitel, M V; Kasumova, L; Babcock, R A; Heinberg, C

    2003-06-12

    One of the fundamental regulations of the Russian State System for Nuclear Material Accounting and Control (SSAC), ''Basic Nuclear Material Control and Accounting Rules,'' directed that a uniform report system be developed to support the operation of the SSAC. According to the ''Regulation on State Nuclear Material Control and Accounting,'' adopted by the Russian Federation Government, Minatom of Russia is response for the development and adoption of report forms, as well as the reporting procedure and schedule. The report forms are being developed in tandem with the creation of an automated national nuclear material control and accounting system, the Federal Information System (FIS). The forms are in different stages of development and implementation. The first report forms (the Summarized Inventory Listing (SIL), Summarized Inventory Change Report (SICR) and federal and agency registers of nuclear material) have already been created and implemented. The second set of reports (nuclear material movement reports and the special anomaly report) is currently in development. A third set of reports (reports on import/export operations, and foreign nuclear material temporarily located in the Russian Federation) is still in the conceptual stage. To facilitate the development of a unified document system, the FIS must establish a uniform philosophy for the reporting system and determine the requirements for each reporting level, adhering to the following principles: completeness--the unified report system provides the entire range of information that the FIS requires to perform SSAC tasks; requisite level of detail; hierarchical structure--each report is based on the information provided in a lower-level report and is the source of information for reports at the next highest level; consistency checking--reports can be checked against other reports. A similar philosophy should eliminate redundancy in the different reports, support a uniform approach to the contents of previously developed and new reports within the FIS, as well as identify the main priorities for the direction of the FIS.

  4. Reliable Distributed Computing for Decision Support Systems

    E-Print Network [OSTI]

    Bargiela, Andrzej

    of pipes and network nodes spread over a large geographical area, calls for a control of computational system it is serv- icing. Addressing the reliability issues of dis- tributed systems involves tackling

  5. IEEE TRANSACTIONS ON CLOUD COMPUTING, VOL. XX, NO. X, XXXX 1 Cloud Federations in the Sky: Formation Game

    E-Print Network [OSTI]

    Grosu, Daniel

    IEEE TRANSACTIONS ON CLOUD COMPUTING, VOL. XX, NO. X, XXXX 1 Cloud Federations in the Sky for cloud resources. The cloud providers' available resources may not be sufficient enough to cope with such demands. Therefore, the cloud providers need to reshape their business structures and seek to improve

  6. Universal quantum computation in integrable systems

    E-Print Network [OSTI]

    Seth Lloyd; Simone Montangero

    2014-08-03

    Quantized integrable systems can be made to perform universal quantum computation by the application of a global time-varying control. The action-angle variables of the integrable system function as qubits or qudits, which can be coupled selectively by the global control to induce universal quantum logic gates. By contrast, chaotic quantum systems, even if controllable, do not generically allow quantum computation under global control.

  7. Non-Classical Computation: a Dynamical Systems Perspective

    E-Print Network [OSTI]

    Stepney, Susan

    Non-Classical Computation: a Dynamical Systems Perspective Susan Stepney Department of Computer. In a classical computational system, that rule is given explicitly by the computer program; in a physical system approach to computation allows us to take a unified view of computation in classical discrete systems

  8. Refurbishment program of HANARO control computer system

    SciTech Connect (OSTI)

    Kim, H. K.; Choe, Y. S.; Lee, M. W.; Doo, S. K.; Jung, H. S. [Korea Atomic Energy Research Inst., 989-111 Daedeok-daero, Yuseong, Daejeon, 305-353 (Korea, Republic of)

    2012-07-01

    HANARO, an open-tank-in-pool type research reactor with 30 MW thermal power, achieved its first criticality in 1995. The programmable controller system MLC (Multi Loop Controller) manufactured by MOORE has been used to control and regulate HANARO since 1995. We made a plan to replace the control computer because the system supplier no longer provided technical support and thus no spare parts were available. Aged and obsolete equipment and the shortage of spare parts supply could have caused great problems. The first consideration for a replacement of the control computer dates back to 2007. The supplier did not produce the components of MLC so that this system would no longer be guaranteed. We established the upgrade and refurbishment program in 2009 so as to keep HANARO up to date in terms of safety. We designed the new control computer system that would replace MLC. The new computer system is HCCS (HANARO Control Computer System). The refurbishing activity is in progress and will finish in 2013. The goal of the refurbishment program is a functional replacement of the reactor control system in consideration of suitable interfaces, compliance with no special outage for installation and commissioning, and no change of the well-proved operation philosophy. HCCS is a DCS (Discrete Control System) using PLC manufactured by RTP. To enhance the reliability, we adapt a triple processor system, double I/O system and hot swapping function. This paper describes the refurbishment program of the HANARO control system including the design requirements of HCCS. (authors)

  9. Method and system for benchmarking computers

    DOE Patents [OSTI]

    Gustafson, John L. (Ames, IA)

    1993-09-14

    A testing system and method for benchmarking computer systems. The system includes a store containing a scalable set of tasks to be performed to produce a solution in ever-increasing degrees of resolution as a larger number of the tasks are performed. A timing and control module allots to each computer a fixed benchmarking interval in which to perform the stored tasks. Means are provided for determining, after completion of the benchmarking interval, the degree of progress through the scalable set of tasks and for producing a benchmarking rating relating to the degree of progress for each computer.

  10. Personal Privacy in Ubiquitous Computing Tools and System Support

    E-Print Network [OSTI]

    Personal Privacy in Ubiquitous Computing Tools and System Support Marc Langheinrich #12;Personal Privacy in Ubiquitous Computing 2 Ubiquitous Computing und Privacy Disappearing Computer Troubadour find their own ways of cheating" Inkompatibel mit Ubiquitous Computing Forschung ,,I think you can

  11. Computer System, Cluster and Networking Summer Institute (CSCNSI...

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

    in setting up, configuring, administering, testing, monitoring, and scheduling computer systems, supercomputer clusters, and computer networks through a variety of...

  12. Computation with perturbed dynamical systems Olivier Bournez

    E-Print Network [OSTI]

    Graça, Daniel S.

    power of dynamical systems robust to infinitesimal perturbations. Previous work on the subject has deserved much attention is concerned with computer aided verification of hybrid/continuous systems [AP04 systems. In opposition, using a different model for noise (infinitesimal perturbations), it was shown [Fr

  13. Department of Electrical and Computer Systems Engineering

    E-Print Network [OSTI]

    Sekercioglu, Y. Ahmet

    Department of Electrical and Computer Systems Engineering Extended Bluetooth In-Car Network. Ahmet Sekercioglu Research sponsored by: AutoCRC Industry Participant: Ben Lannan (Holden, Electrical Dept) John Sergakis (Holden, Electrical Dept) Introduction & Objectives Bluetooth presents automotive

  14. The Trouble with Social Computing Systems Research

    E-Print Network [OSTI]

    Bernstein, Michael S.

    Social computing has led to an explosion of research in understanding users, and it has the potential to similarly revolutionize systems research. However, the number of papers designing and building new sociotechnical ...

  15. Computer-Aided dispatching system design specification

    SciTech Connect (OSTI)

    Briggs, M.G.

    1996-05-03

    This document defines the performance requirements for a graphic display dispatching system to support Hanford Patrol emergency response. This system is defined as a Commercial-Off the-Shelf computer dispatching system providing both text and graphical display information while interfacing with the diverse reporting system within the Hanford Facility. This system also provided expansion capabilities to integrate Hanford Fire and the Occurrence Notification Center and provides back-up capabilities for the Plutonium Processing Facility.

  16. Srinivasan Named Head of NERSC's Computational Systems Group

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

    Srinivasan Named Head of NERSC's Computational Systems Group Srinivasan Named Head of NERSC's Computational Systems Group August 31, 2011 | Tags: NERSC Jay Srinivasan has been...

  17. GEORGE NAGY Electrical, Computer, and Systems Engineering

    E-Print Network [OSTI]

    Nagy, George

    to geographic information systems. 1990 Syntactic page format analysis and electronic browsing for technical Devices 1963 Pattern Recognition 1968, 971 Remote Sensing and Geographic Information Systems 1972, 1979 processing techniques to OCR, speech, biomedical problems, computer-aided learning, geographical information

  18. Computing Criticality of Lines in Power Systems

    SciTech Connect (OSTI)

    Pinar, Ali; Reichert, Adam; Lesieutre, Bernard

    2006-10-13

    We propose a computationally efficient method based onnonlinear optimization to identify critical lines, failure of which cancause severe blackouts. Our method computes criticality measure for alllines at a time, as opposed to detecting a single vulnerability,providing a global view of the system. This information on criticality oflines can be used to identify multiple contingencies by selectivelyexploring multiple combinations of broken lines. The effectiveness of ourmethod is demonstrated on the IEEE 30 and 118 bus systems, where we canvery quickly detect the most critical lines in the system and identifysevere multiple contingencies.

  19. A Middleware Architecture for Federated Control Systems1

    E-Print Network [OSTI]

    and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign P. R. Kumar Dept. of Electrical. A PROTOTYPE SYSTEM Figure 1 illustrates the prototype system of interest. The system consists of a set of cars moving on a track. Each car is remotely controlled using an RF transmitter, which is in turn connected

  20. An analytic system with a computable hyperbolic sink whose basin of attraction is non-computable

    E-Print Network [OSTI]

    Graça, Daniel S.

    An analytic system with a computable hyperbolic sink whose basin of attraction is non-computable that one cannot compute, in general, the basins of attraction of even very regular systems, namely analytic (even C -systems) with domains of attraction which encode non-computable problems and which are thus non-computable

  1. Fair and Efficient Secure Multiparty Computation with Reputation Systems

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Fair and Efficient Secure Multiparty Computation with Reputation Systems Gilad Asharov, Yehuda majority are not obtained. Keywords: secure multiparty computation, reputation systems, new models 1 Lindell, and Hila Zarosim Dept. of Computer Science, Bar-Ilan University, Israel {asharog

  2. Computer surety: computer system inspection guidance. [Contains glossary

    SciTech Connect (OSTI)

    Not Available

    1981-07-01

    This document discusses computer surety in NRC-licensed nuclear facilities from the perspective of physical protection inspectors. It gives background information and a glossary of computer terms, along with threats and computer vulnerabilities, methods used to harden computer elements, and computer audit controls.

  3. The CMS Computing System: Successes and Challenges

    E-Print Network [OSTI]

    Kenneth Bloom

    2009-10-01

    Each LHC experiment will produce datasets with sizes of order one petabyte per year. All of this data must be stored, processed, transferred, simulated and analyzed, which requires a computing system of a larger scale than ever mounted for any particle physics experiment, and possibly for any enterprise in the world. I discuss how CMS has chosen to address these challenges, focusing on recent tests of the system that demonstrate the experiment's readiness for producing physics results with the first LHC data.

  4. Integrative Genomics and Computational Systems Medicine

    SciTech Connect (OSTI)

    McDermott, Jason E.; Huang, Yufei; Zhang, Bing; Xu, Hua; Zhao, Zhongming

    2014-01-01

    The exponential growth in generation of large amounts of genomic data from biological samples has driven the emerging field of systems medicine. This field is promising because it improves our understanding of disease processes at the systems level. However, the field is still in its young stage. There exists a great need for novel computational methods and approaches to effectively utilize and integrate various omics data.

  5. 2011 IBM Corporation Computer system energy management

    E-Print Network [OSTI]

    Shi, Weisong

    © 2011 IBM Corporation Computer system energy management Charles Lefurgy 28 July 2011 #12;© 2011 IBM Corporation2 Outline A short history of server power management POWER7 EnergyScale AMESTER power management 2010: POWER7 uses DDR3 self-refresh mode POWER7 with Turbo mode Partition-aware power capping 2011

  6. CSC 8400: Computer Systems Pointers, Arrays

    E-Print Network [OSTI]

    1 CSC 8400: Computer Systems Pointers, Arrays and Strings in C Overview ·Pointers -Variables that hold memory addresses -Using pointers to do "call-by-reference" in C ·Arrays -List of elements #12;2 Insight: Write a swap function void swap(int x, int y

  7. Computers for Learning

    Broader source: Energy.gov [DOE]

    Through Executive Order 12999, the Computers for Learning Program was established to provide Federal agencies a quick and easy system for donating excess and surplus computer equipment to schools...

  8. Analog system for computing sparse codes

    DOE Patents [OSTI]

    Rozell, Christopher John (El Cerrito, CA); Johnson, Don Herrick (Houston, TX); Baraniuk, Richard Gordon (Houston, TX); Olshausen, Bruno A. (San Francisco, CA); Ortman, Robert Lowell (Houston, TX)

    2010-08-24

    A parallel dynamical system for computing sparse representations of data, i.e., where the data can be fully represented in terms of a small number of non-zero code elements, and for reconstructing compressively sensed images. The system is based on the principles of thresholding and local competition that solves a family of sparse approximation problems corresponding to various sparsity metrics. The system utilizes Locally Competitive Algorithms (LCAs), nodes in a population continually compete with neighboring units using (usually one-way) lateral inhibition to calculate coefficients representing an input in an over complete dictionary.

  9. IBM Systems Journal Q3 2002 Comparing Autonomic & Proactive Computing

    E-Print Network [OSTI]

    Somayaji, Anil

    IBM Systems Journal Q3 2002 Comparing Autonomic & Proactive Computing Roy Want , Trevor Pering between proactive computing and autonomic computing, considering the design of systems that are beyond principles we call proactive computing, enabling the transition from today's interactive systems to proactive

  10. Computation Availability of Crossbar Systems in a Nonuniform Traffic Environment

    E-Print Network [OSTI]

    Atiquzzaman, Mohammed

    Computation Availability of Crossbar Systems in a Non­uniform Traffic Environment M. Atiquzzaman M in the presence of a hot spot in the system. Computation availability is taken as the criteria for measuring as the amount of computation available at time t. The computation availability is based on the system

  11. Robust Resource Allocations in Parallel Computing Systems: Model and Heuristics

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    Robust Resource Allocations in Parallel Computing Systems: Model and Heuristics Vladimir Shestak1 in parallel computer systems (including heterogeneous clusters) should be allocated to the computational was supported by the Colorado State University Center for Robustness in Computer Systems (funded by the Colorado

  12. UC Davis Health System -Computer Workstation Self Evaluation Assessment Date: ______________

    E-Print Network [OSTI]

    Leistikow, Bruce N.

    UC Davis Health System - Computer Workstation Self Evaluation Assessment Date Ergonomics Program at 734-6180 #12;UCDHS ERGONOMICS PROGRAM Adjusting your Computer Workstation to Fit

  13. Specialized computer algebra system for application in general relativity

    E-Print Network [OSTI]

    S. Tertychniy

    2007-04-11

    A brief characteristic of the specialized computer algebra system GRG_EC intended for symbolic computations in the field of general relativity is given.

  14. LVT: A Layered Verification Technique for Distributed Computing Systems

    E-Print Network [OSTI]

    Olsson, Ron

    LVT: A Layered Verification Technique for Distributed Computing Systems Cui Zhang ? , Brian R of distributed computing systems with multiple component layers. Each lower layer in such a system provides languages as interfaces of systems, LVT treats each layer in a distributed computing system as a distributed

  15. Multi-Agent Based Federated Control of Large-Scale Systems with Application to Ship Roll Control

    E-Print Network [OSTI]

    Eustice, Ryan

    Multi-Agent Based Federated Control of Large-Scale Systems with Application to Ship Roll Control of many interconnected local systems. Conventional centralized control schemes are not suitable, a multi-agent based federated control system is composed of local autonomous subsystems (agent

  16. Computational systems biology and in silico modeling of the

    E-Print Network [OSTI]

    Borenstein, Elhanan

    Computational systems biology and in silico modeling of the human microbiome Elhanan Borenstein Professor at the Santa Fe Institute. His research interests include computational and evolutionary systems is a complex biological system with numerous interacting components across multiple organizational levels

  17. Low Power Dynamic Scheduling for Computing Systems

    E-Print Network [OSTI]

    Neely, Michael J

    2011-01-01

    This paper considers energy-aware control for a computing system with two states: "active" and "idle." In the active state, the controller chooses to perform a single task using one of multiple task processing modes. The controller then saves energy by choosing an amount of time for the system to be idle. These decisions affect processing time, energy expenditure, and an abstract attribute vector that can be used to model other criteria of interest (such as processing quality or distortion). The goal is to optimize time average system performance. Applications of this model include a smart phone that makes energy-efficient computation and transmission decisions, a computer that processes tasks subject to rate, quality, and power constraints, and a smart grid energy manager that allocates resources in reaction to a time varying energy price. The solution methodology of this paper uses the theory of optimization for renewal systems developed in our previous work. This paper is written in tutorial form and devel...

  18. REVISED CATALOG OF SECURITY CONTROLS FOR FEDERAL INFORMATION SYSTEMS AND ORGANIZATIONS: FOR USE IN BOTH

    E-Print Network [OSTI]

    REVISED CATALOG OF SECURITY CONTROLS FOR FEDERAL INFORMATION SYSTEMS AND ORGANIZATIONS: FOR USE and expanded its catalog of security controls to help organizations protect their information and information, the revised catalog brings together, for the first time, comprehensive information about security controls

  19. Federated DyKnow, a Distributed Information Fusion System for Collaborative UAVs

    E-Print Network [OSTI]

    Doherty, Patrick

    Federated DyKnow, a Distributed Information Fusion System for Collaborative UAVs Fredrik Heintz {frehe, patdo}@ida.liu.se Abstract--As unmanned aerial vehicle (UAV) applications are becoming more complex and covering larger physical areas there is an increasing need for multiple UAVs to cooperatively

  20. Cloud Computing Security in Business Information Systems

    E-Print Network [OSTI]

    Ristov, Sasko; Kostoska, Magdalena

    2012-01-01

    Cloud computing providers' and customers' services are not only exposed to existing security risks, but, due to multi-tenancy, outsourcing the application and data, and virtualization, they are exposed to the emergent, as well. Therefore, both the cloud providers and customers must establish information security system and trustworthiness each other, as well as end users. In this paper we analyze main international and industrial standards targeting information security and their conformity with cloud computing security challenges. We evaluate that almost all main cloud service providers (CSPs) are ISO 27001:2005 certified, at minimum. As a result, we propose an extension to the ISO 27001:2005 standard with new control objective about virtualization, to retain generic, regardless of company's type, size and nature, that is, to be applicable for cloud systems, as well, where virtualization is its baseline. We also define a quantitative metric and evaluate the importance factor of ISO 27001:2005 control objecti...

  1. computers

    National Nuclear Security Administration (NNSA)

    Each successive generation of computing system has provided greater computing power and energy efficiency.

    CTS-1 clusters will support NNSA's Life Extension Program and...

  2. 2-SATISFIABILITY AND DIAGNOSING FAULTY PROCESSORS MASSIVELY PARALLEL COMPUTING SYSTEMS

    E-Print Network [OSTI]

    Servatius, Brigitte

    2-SATISFIABILITY AND DIAGNOSING FAULTY PROCESSORS IN MASSIVELY PARALLEL COMPUTING SYSTEMS ANSUMAN the number of processors in the system. 1. Introduction In a massively parallel computing system, such as CM be used more often. In multi-processor computers there are two different system modes, a normal operation

  3. Availability Analysis of Repairable Computer Systems and Stationarity Detection

    E-Print Network [OSTI]

    Sericola, Bruno

    Availability Analysis of Repairable Computer Systems and Stationarity Detection Bruno Sericola computer system and we assume, as usual, that the system is modeled by a finite Markov process. We propose of performability measures. Index TermsÐRepairable computer systems, dependability, availability, performability

  4. Bond Computing Systems: a Biologically Inspired and High-level Dynamics Model for Pervasive Computing

    E-Print Network [OSTI]

    Dang, Zhe

    Bond Computing Systems: a Biologically Inspired and High-level Dynamics Model for Pervasive. Targeting at modeling the high-level dynamics of pervasive comput- ing systems, we introduce Bond Computing are regular, and study their computation power and verification problems. Among other results, we show

  5. Methodological advances in computer simulation of biomolecular systems

    E-Print Network [OSTI]

    Fischer, Wolfgang

    Methodological advances in computer simulation of biomolecular systems Wilfred F. van Gunsteren Computer simulation of the dynamics of biomolecular systems by the molecular dynamics technique yields computing power. Recent advances in simulation methodology e.g. to rapidly compute many free energies from

  6. Revised CPA method to compute Lyapunov functions for nonlinear systems

    E-Print Network [OSTI]

    Hafstein, Sigurður Freyr

    Revised CPA method to compute Lyapunov functions for nonlinear systems Peter A. Giesla , Sigurdur F in computing a CPA Lyapunov function for such a system. The size of the domain of the computed CPA Lyapunov method uses linear programming to compute Continuous and Piecewise Affine Lyapunov function for nonlinear

  7. Call for Papers Elsevier Journal of Computer and System Sciences

    E-Print Network [OSTI]

    Chu, Xiaowen

    at the 14th IEEE International Conference on High Performance Computing and Communications (HPCC-2012 and an ever-increasing demand for practice of high performance computing systems, due to the rapid growth in computing and communications technology. High performance computing systems has moved into the mainstream

  8. Federal participation in LEED

    E-Print Network [OSTI]

    Payne, Christopher; Dyer, Beverly

    2004-01-01

    Federal Participation in LEED Christopher Payne 1 BeverlyBuilding Rating System (LEED). This paper presents a review16 federal buildings under LEED: three buildings using the

  9. Computer Science and Computer Information Systems Faculty: M. Branton, H. ElAarag, D. Plante, H. Pulapaka

    E-Print Network [OSTI]

    Miles, Will

    Computer Science and Computer Information Systems Faculty: M. Branton, H. ElAarag, D. Plante, H they can concentrate in one of two defined degree tracks, Computer Science and Computer Information Systems degree in Computer Science or in Computer Information Systems, as appropriate. The Computer Science track

  10. A Proposed Implementation of Tarjan's Algorithm for Scheduling the Solution Sequence of Systems of Federated Models

    SciTech Connect (OSTI)

    McNunn, Gabriel S; Bryden, Kenneth M

    2013-01-01

    Tarjan's algorithm schedules the solution of systems of equations by noting the coupling and grouping between the equations. Simulating complex systems, e.g., advanced power plants, aerodynamic systems, or the multi-scale design of components, requires the linkage of large groups of coupled models. Currently, this is handled manually in systems modeling packages. That is, the analyst explicitly defines both the method and solution sequence necessary to couple the models. In small systems of models and equations this works well. However, as additional detail is needed across systems and across scales, the number of models grows rapidly. This precludes the manual assembly of large systems of federated models, particularly in systems composed of high fidelity models. This paper examines extending Tarjan's algorithm from sets of equations to sets of models. The proposed implementation of the algorithm is demonstrated using a small one-dimensional system of federated models representing the heat transfer and thermal stress in a gas turbine blade with thermal barrier coating. Enabling the rapid assembly and substitution of different models permits the rapid turnaround needed to support the “what-if” kinds of questions that arise in engineering design.

  11. From Computability to Concurrency Theory Calculus of Comunicating Systems CCS

    E-Print Network [OSTI]

    Valencia, Frank D.

    From Computability to Concurrency Theory Calculus of Comunicating Systems CCS Mobility and the pi Paris (LIX) Oct 2005/CLEI'05 CLEI'05 Cali Communicating and Mobile Systems #12;From Computability #12;From Computability to Concurrency Theory Calculus of Comunicating Systems CCS Mobility and the pi

  12. PARMON: A Comprehensive Cluster Monitoring System School of Computing Science

    E-Print Network [OSTI]

    Melbourne, University of

    1 PARMON: A Comprehensive Cluster Monitoring System RAJKUMAR School of Computing Science Queensland@fit.qut.edu.au KRISHNA MOHAN and BINDU GOPAL Operating Systems Group Centre for Development of Advanced Computing 2 together as one system. Rapid changes in both areas of computing and communication (availability

  13. Fall Semester Technical College Course Computer Information Systems Course Requirements

    E-Print Network [OSTI]

    First Year Fall Semester Technical College Course Computer Information Systems Course Requirements Semester Technical College Course Computer Information Systems Course Requirements EGR 283 CSCE 146 ENG 102 Semester Technical College Course Computer Information Systems Course Requirements ECO 210 + 211 ECON 224

  14. Computational Challenges in Systems Biology Allison P. Heatha

    E-Print Network [OSTI]

    Kavraki, Lydia E.

    Computational Challenges in Systems Biology Allison P. Heatha , Lydia E. Kavrakia,b,c a Department computational and experimental approaches to provide a system level understanding of biologi- cal function. Initial forays into computational systems biology have focused on a variety of biological networks

  15. Sensitivity Analysis Methodology for a Complex System Computational Model

    E-Print Network [OSTI]

    1 Sensitivity Analysis Methodology for a Complex System Computational Model James J. Filliben of computational models to serve as predictive surrogates for the system. The use of such models increasingly) of a computational model for a complex system is always an essential component in accepting/rejecting such a model

  16. Disaster Tolerant Computer and Communication Systems Stephen A. SZYGENDA

    E-Print Network [OSTI]

    Thornton, Mitchell

    Disaster Tolerant Computer and Communication Systems Stephen A. SZYGENDA Department of Engineering Management, Information and Systems, SMU Department of Computer Science and Engineering, SMU Dallas, Texas of normality. Disaster tolerance of computer and communication systems is described and methods for modeling

  17. "Creating computational models of biological systems to better combat

    E-Print Network [OSTI]

    Zhigilei, Leonid V.

    "Creating computational models of biological systems to better combat dangerous pathogens and human of Biomedical Engineering University of Virginia Charlottesville, VA 434.924.8195 Computational Systems Biology system in biofuel and nutraceutical production. With the aid of computational techniques, we can predict

  18. A Computer-Oriented System Assembling and Displaying

    E-Print Network [OSTI]

    A Computer-Oriented System for Assembling and Displaying Land Management Information Elliot L. A computer-oriented system for assembling and display- ing land management information. Berkeley, Calif and potential uses for the system and includes cost estimates. 582:U518;2 Amidon, Elliot L. 1964. A computer

  19. A Framework for Specifying, Prototyping, and Reasoning about Computational Systems

    E-Print Network [OSTI]

    Minnesota, University of

    A Framework for Specifying, Prototyping, and Reasoning about Computational Systems (Doctoral in a framework for specifying, prototyping, and reasoning about systems that describe computations over formal. The development of these computational systems is often an iterative process where one refines the specification

  20. Information Security and Computer Systems: An Integrated Approach

    E-Print Network [OSTI]

    Holliday, Mark A.

    Information Security and Computer Systems: An Integrated Approach Mark A. Holliday Dept in information security that build upon concepts the students will already have seen in their computer systems this integrated approach to information security and computer systems. Categories and Subject Descriptors D.4

  1. 1 Designing Constraint Logic Programming Languages using Computational Systems

    E-Print Network [OSTI]

    Vittek, Marian

    1 Designing Constraint Logic Programming Languages using Computational Systems Claude Kirchner, H'el`ene Kirchner and Marian Vittek 1.1 Abstract This work presents computational systems, a framework as computational systems. We thus get a framework in which rewriting techniques can be used to reason about

  2. Agents in Bioinformatics, Computational and Systems Emanuela Merellia

    E-Print Network [OSTI]

    Martin, Andrew C.R.

    of agents for computational Grids. Keywords: Agents, Multiagent Systems, Data Analysis and Management communities to develop a different (agent-based) approach of computational frameworks both for data analysis and management in bioinformatics and for systems modelling and simulation in computational and systems biology

  3. Federal policies to promote the widespread utilization of photovoltaic systems. Supplement: review and critique

    SciTech Connect (OSTI)

    Smith, J.L.

    1980-04-15

    This document is intended as a supplement to the two-volume report entitled Federal Policies to Promote the Widespread Utilization of Photovoltaic Systems that was submitted to Congress by the Department of Energy in February and April of 1980. This supplement contains review comments prepared by knowledgeable experts who reviewed early drafts of the Congressional report. Responses to the review comments by the Jet Propulsion Laboratory, preparer of the Congressional report, are also included in this supplement. The Congressional report, mandated in the Solar Photovoltaic Energy Research, Development, and Demonstration Act of 1978 (P.L. 95-590), discusses various issues related to promoting the deployment of photovoltaic systems through the Federal Photovoltaic Program. Various program strategies and funding levels are examined.

  4. A Survey of Human Computation Systems Man-Ching Yuen

    E-Print Network [OSTI]

    Chen, Ling-Jyh

    arti- ficial intelligence (AI) problems through human power. There exists some AI problems gives a discussion and conclusion of our work. II. INITIATORY HUMAN COMPUTATION As computation powerA Survey of Human Computation Systems Man-Ching Yuen Dept. of Computer Science & Engineering

  5. Bond Computing Systems: a Biologically Inspired and High-level Dynamics Model for Pervasive Computing

    E-Print Network [OSTI]

    Dang, Zhe

    Bond Computing Systems: a Biologically Inspired and High-level Dynamics Model for Pervasive their com- putation power and verification problems. Among other results, we show that the computing power) techniques for pervasive computing systems. At a high-level, there are at least two views in modeling

  6. Cloud Computing and Distributed Systems Laboratory DEPT. OF COMPUTER SCIENCE AND SOFTWARE ENGINEERING

    E-Print Network [OSTI]

    Melbourne, University of

    Cloud Computing and Distributed Systems Laboratory DEPT. OF COMPUTER SCIENCE AND SOFTWARE ENGINEERING THE UNIVERSITY OF MELBOURNE, AUSTRALIA The Cloud Computing and Distributed Systems (CLOUDS in 2008 by the CLOUDS lab at the University of Melbourne, facilitates the realization of the above vision

  7. The Earth System Grid Federation: An Open Infrastructure for Access to Distributed Geospatial Data

    SciTech Connect (OSTI)

    Ananthakrishnan, Rachana; Bell, Gavin; Cinquini, Luca; Crichton, Daniel; Danvil, Sebastian; Drach, Bob; Fiore, Sandro; Gonzalez, Estanislao; Harney, John F; Mattmann, Chris; Kershaw, Philip; Morgan, Mark; Pascoe, Stephen; Shipman, Galen M; Wang, Feiyi

    2013-01-01

    The Earth System Grid Federation (ESGF) is a multi-agency, international collaboration that aims at developing the software infrastructure needed to facilitate and empower the study of climate change on a global scale. The ESGF s architecture employs a system of geographically distributed peer nodes, which are independently administered yet united by the adoption of common federation protocols and application programming interfaces (APIs). The cornerstones of its interoperability are the peer-to-peer messaging that is continuously exchanged among all nodes in the federation; a shared architecture and API for search and discovery; and a security infrastructure based on industry standards (OpenID, SSL, GSI and SAML). The ESGF software is developed collaboratively across institutional boundaries and made available to the community as open source. It has now been adopted by multiple Earth science projects and allows access to petabytes of geophysical data, including the entire model output used for the next international assessment report on climate change (IPCC-AR5) and a suite of satellite observations (obs4MIPs) and reanalysis data sets (ANA4MIPs).

  8. The Earth System Grid Federation: An Open Infrastructure for Access to Distributed Geo-Spatial Data

    SciTech Connect (OSTI)

    Cinquini, Luca; Crichton, Daniel; Miller, Neill; Mattmann, Chris; Harney, John F; Shipman, Galen M; Wang, Feiyi; Bell, Gavin; Drach, Bob; Ananthakrishnan, Rachana; Pascoe, Stephen; Fiore, Sandro; Schweitzer, Roland; Danvil, Sebastian; Morgan, Mark

    2012-01-01

    The Earth System Grid Federation (ESGF) is a multi-agency, international collaboration that aims at developing the software infrastructure needed to facilitate and empower the study of climate change on a global scale. The ESGF s architecture employs a system of geographically distributed peer nodes, which are independently administered yet united by the adoption of common federation protocols and application programming interfaces (APIs). The cornerstones of its interoperability are the peer-to-peer messaging that is continuously exchanged among all nodes in the federation; a shared architecture and API for search and discovery; and a security infrastructure based on industry standards (OpenID, SSL, GSI and SAML). The ESGF software is developed collaboratively across institutional boundaries and made available to the community as open source. It has now been adopted by multiple Earth science projects and allows access to petabytes of geophysical data, including the entire model output used for the next international assessment report on climate change (IPCC-AR5) and a suite of satellite observations (obs4MIPs) and reanalysis data sets (ANA4MIPs).

  9. The Structure and Properties of Silica Glass Nanostructures using Novel Computational Systems

    E-Print Network [OSTI]

    Doblack, Benjamin Nelson

    2013-01-01

    of the novel computational system used in this thesis. Thisusing Novel Computational Systems A Thesis submitted inusing Novel Computational Systems Abstract The structure and

  10. Envisioning the Future of Computational Media: The Final Report of the Media Systems Project

    E-Print Network [OSTI]

    Wardrip–Fruin, Noah; Mateas, Michael

    2014-01-01

    with the Mimesis SystemComputational Creativity (2012):scholarship both in computational systems and in the areapace with changes? What computational systems allow for real

  11. HPGMG 1.0: A Benchmark for Ranking High Performance Computing Systems

    E-Print Network [OSTI]

    Adams, Mark

    2014-01-01

    for Ranking High Performance Computing Systems Mark F. Adamsmetric for ranking high performance computing systems. HPLmetric for ranking high performance computing systems. When

  12. Rice University Electrical and Computer Engineering Digital Systems Processing (DSP)

    E-Print Network [OSTI]

    Natelson, Douglas

    Rice University Electrical and Computer Engineering Digital Systems Processing (DSP) Learn more;Rice University Electrical and Computer Engineering Digital Systems Processing (DSP) Faculty Learn more, signal processing and computer vision Dr. Veeraraghavan received his B.Tech. in Electrical Engineering

  13. Robust computations with dynamical systems Olivier Bournez1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . In this paper we discuss the computational power of Lips- chitz dynamical systems which are robust in the following manner: undecidability of verification doesn't hold for Lipschitz, computable and robust systems words : Verification, Model-checking, Computable Analysis, Analog Com- putations. 1 Introduction

  14. Theoretical Neuroscience: Computational and Mathematical Modeling of Neural Systems

    E-Print Network [OSTI]

    Olshausen, Bruno

    Theoretical Neuroscience: Computational and Mathematical Modeling of Neural Systems Peter Dayan: Computational and Mathematical Modeling of Neural Systems. The emergence of this book represents more than- scientist was brought up on ``Kandel and Schwartz.'' Now, at last, the field of computational neuroscience

  15. ADistributed Computer Algebra System Based on Maple and Java 1

    E-Print Network [OSTI]

    ADistributed Computer Algebra System Based on Maple and Java 1 Wolfgang Schreiner Research Distributed Maple is a system for writing parallel programs in the computer algebra system Maple. It allows scheduler from Maple and implements a parallel programming model on top. The system is portable to most

  16. A computing system for LBB considerations

    SciTech Connect (OSTI)

    Ikonen, K.; Miettinen, J.; Raiko, H.; Keskinen, R.

    1997-04-01

    A computing system has been developed at VTT Energy for making efficient leak-before-break (LBB) evaluations of piping components. The system consists of fracture mechanics and leak rate analysis modules which are linked via an interactive user interface LBBCAL. The system enables quick tentative analysis of standard geometric and loading situations by means of fracture mechanics estimation schemes such as the R6, FAD, EPRI J, Battelle, plastic limit load and moments methods. Complex situations are handled with a separate in-house made finite-element code EPFM3D which uses 20-noded isoparametric solid elements, automatic mesh generators and advanced color graphics. Analytical formulas and numerical procedures are available for leak area evaluation. A novel contribution for leak rate analysis is the CRAFLO code which is based on a nonequilibrium two-phase flow model with phase slip. Its predictions are essentially comparable with those of the well known SQUIRT2 code; additionally it provides outputs for temperature, pressure and velocity distributions in the crack depth direction. An illustrative application to a circumferentially cracked elbow indicates expectedly that a small margin relative to the saturation temperature of the coolant reduces the leak rate and is likely to influence the LBB implementation to intermediate diameter (300 mm) primary circuit piping of BWR plants.

  17. Transition to cloud computing in healthcare information systems

    E-Print Network [OSTI]

    Ren, Haiying, S.M. Massachusetts Institute of Technology

    2012-01-01

    This thesis is a study on the adoption of cloud computing in healthcare information technology industry. It provides a guideline for people who are trying to bring cloud computing into healthcare information systems through ...

  18. C++ programming techniques for High Performance Computing on systems with

    E-Print Network [OSTI]

    Fiebig, Peter

    C++ programming techniques for High Performance Computing on systems with non-uniform memory access (including NUMA) without sacrificing performance. ccNUMA In High Performance Computing (HPC), shared- memory

  19. Fault-Tolerant Quantum Computation with Higher-Dimensional Systems

    E-Print Network [OSTI]

    Daniel Gottesman

    1998-02-02

    Instead of a quantum computer where the fundamental units are 2-dimensional qubits, we can consider a quantum computer made up of d-dimensional systems. There is a straightforward generalization of the class of stabilizer codes to d-dimensional systems, and I will discuss the theory of fault-tolerant computation using such codes. I prove that universal fault-tolerant computation is possible with any higher-dimensional stabilizer code for prime d.

  20. Computing Augmented Finite Transition Systems to Synthesize Switching Protocols for Polynomial Switched Systems

    E-Print Network [OSTI]

    Ozay, Necmiye

    Computing Augmented Finite Transition Systems to Synthesize Switching Protocols for Polynomial algorithms to compute abstractions for polynomial switched systems. Moreover, we define a refinement relation Switched Systems Necmiye Ozay, Jun Liu, Pavithra Prabhakar, and Richard M. Murray Abstract-- This work

  1. Research and Implementation of Computer Simulation System for Neural Networks

    E-Print Network [OSTI]

    Byrne, John H.

    Research and Implementation of Computer Simulation System for Neural Networks Chen, Houjin Yuan: The ability of a neural network to process information and to generate a specific pattern of electrical computer simulation system for neural networks was designed and implemented including system architecture

  2. Overview of ASC Capability Computing System Governance Model

    SciTech Connect (OSTI)

    Doebling, Scott W. [Los Alamos National Laboratory

    2012-07-11

    This document contains a description of the Advanced Simulation and Computing Program's Capability Computing System Governance Model. Objectives of the Governance Model are to ensure that the capability system resources are allocated on a priority-driven basis according to the Program requirements; and to utilize ASC Capability Systems for the large capability jobs for which they were designed and procured.

  3. Computer Systems Research at UCSC: Quadrillions of Bytes and Microsecond

    E-Print Network [OSTI]

    Lee, Herbie

    , Feng Wang, Sage Weil, Joel Wu, Chris Xin, Lan Xue #12;Project overview · Scalable file systems systems (e.g., SAP) · General-purpose computing (e.g., UCSC) · Major funding from the NationalComputer Systems Research at UCSC: Quadrillions of Bytes and Microsecond Deadlines Scott A. Brandt

  4. Federal Acquisition Regulation; Federal Acquisition Circular...

    Energy Savers [EERE]

    Federal Acquisition Regulation; Federal Acquisition Circular Federal Acquisition Regulation; Federal Acquisition Circular Federal Acquisition Regulation; Federal Acquisition...

  5. Computational Tools for Cyber-Physical Systems

    E-Print Network [OSTI]

    Gonzalez, Humberto

    2012-01-01

    control of a nonlinear dynamical system using pseudospectralproperties for nonlinear dynamical systems. These challengescontrol of nonlinear dynamical systems using pseudospectral

  6. System Support for Rapid Ubiquitous Computing Application Development and Evaluation

    E-Print Network [OSTI]

    Murphy, Robert F.

    System Support for Rapid Ubiquitous Computing Application Development and Evaluation Manuel Roman1, rhc, mickunas}@uiuc.edu Abstract. Ubiquitous computing defines a new domain in which large collections for ubiquitous computing provide generic functionality to simplify the development of applications. In this paper

  7. towards computational engineering of chaotic systems

    E-Print Network [OSTI]

    aelazab

    2013-01-14

    Jan 16, 2013 ... Purdue University. Computational Programs. ** Refreshments will be provided at 3:30pm followed by seminar. Seminar schedule can be found ...

  8. 2014 Earth System Grid Federation and Ultrascale Visualization Climate Data Analysis Tools Conference Report

    SciTech Connect (OSTI)

    Williams, Dean N.

    2015-01-27

    The climate and weather data science community met December 9–11, 2014, in Livermore, California, for the fourth annual Earth System Grid Federation (ESGF) and Ultrascale Visualization Climate Data Analysis Tools (UV-CDAT) Face-to-Face (F2F) Conference, hosted by the Department of Energy, National Aeronautics and Space Administration, National Oceanic and Atmospheric Administration, the European Infrastructure for the European Network of Earth System Modelling, and the Australian Department of Education. Both ESGF and UVCDATremain global collaborations committed to developing a new generation of open-source software infrastructure that provides distributed access and analysis to simulated and observed data from the climate and weather communities. The tools and infrastructure created under these international multi-agency collaborations are critical to understanding extreme weather conditions and long-term climate change. In addition, the F2F conference fosters a stronger climate and weather data science community and facilitates a stronger federated software infrastructure. The 2014 F2F conference detailed the progress of ESGF, UV-CDAT, and other community efforts over the year and sets new priorities and requirements for existing and impending national and international community projects, such as the Coupled Model Intercomparison Project Phase Six. Specifically discussed at the conference were project capabilities and enhancements needs for data distribution, analysis, visualization, hardware and network infrastructure, standards, and resources.

  9. A Computer Algebra System for Polynomial Computations Version 401, 2014

    E-Print Network [OSTI]

    Madlener, Klaus

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 5 Functions and system variables . . . . . . . . . . . . . . . . . . . . . . . . . 182 6 Tricks Mathematical background . . . . . . . . . . . . . . . . . . . . . . 695 Appendix D SINGULAR libraries the terms of the GNU General Public License as published by the Free Software Foundation (version 2

  10. Methods for operating parallel computing systems employing sequenced communications

    DOE Patents [OSTI]

    Benner, R.E.; Gustafson, J.L.; Montry, G.R.

    1999-08-10

    A parallel computing system and method are disclosed having improved performance where a program is concurrently run on a plurality of nodes for reducing total processing time, each node having a processor, a memory, and a predetermined number of communication channels connected to the node and independently connected directly to other nodes. The present invention improves performance of the parallel computing system by providing a system which can provide efficient communication between the processors and between the system and input and output devices. A method is also disclosed which can locate defective nodes with the computing system. 15 figs.

  11. Methods for operating parallel computing systems employing sequenced communications

    DOE Patents [OSTI]

    Benner, Robert E. (Albuquerque, NM); Gustafson, John L. (Albuquerque, NM); Montry, Gary R. (Albuquerque, NM)

    1999-01-01

    A parallel computing system and method having improved performance where a program is concurrently run on a plurality of nodes for reducing total processing time, each node having a processor, a memory, and a predetermined number of communication channels connected to the node and independently connected directly to other nodes. The present invention improves performance of performance of the parallel computing system by providing a system which can provide efficient communication between the processors and between the system and input and output devices. A method is also disclosed which can locate defective nodes with the computing system.

  12. 15.094 Systems Optimization: Models and Computation, Spring 2002

    E-Print Network [OSTI]

    Freund, Robert Michael

    A computational and application-oriented introduction to the modeling of large-scale systems in a wide variety of decision-making domains and the optimization of such systems using state-of-the-art optimization software. ...

  13. Microelectromechanical Systems and Nanomaterials: Experimental and Computational MechanicsAspects

    E-Print Network [OSTI]

    Espinosa, Horacio D.

    Aspects PREFACE Horacio D. Espinosa Northwestern University Microelectromechanical systems (MEMSMicroelectromechanical Systems and Nanomaterials: Experimental and Computational Mechanics) and nanomaterials are two emerging technologies of impor- tance in society. MEMS are currently used in avariety

  14. Development of a Computer Heating Monitoring System and Its Applications 

    E-Print Network [OSTI]

    Chen, H.; Li, D.; Shen, L.

    2006-01-01

    This paper develops a computer heating monitoring system, introduces the components and principles of the monitoring system, and provides a study on its application to residential building heating including analysis of indoor and outdoor air...

  15. GENERATION OF THESAURUS IN DIFFERENT LANGUAGES A COMPUTER BASED SYSTEM

    E-Print Network [OSTI]

    GENERATION OF THESAURUS IN DIFFERENT LANGUAGES A COMPUTER BASED SYSTEM F J DEVADASON Documentation and Bhattacharyya's POPSI. A computer based system, for generating an information retrieval thesaurus, from as an alphabetical thesaurus. Also, once a thesaurus is generated in one language it is possi- ble to produce

  16. CSCE-313 Introduction to Computer Systems Introduction CSCE 313 Introduction to

    E-Print Network [OSTI]

    Gu, Guofei

    CSCE-313 Introduction to Computer Systems Introduction 1 CSCE 313 Introduction to Computer Systems System #12;CSCE-313 Introduction to Computer Systems Introduction 2 Introduction to OSs · What of an Operating System Four Components of a Computer System #12;CSCE-313 Introduction to Computer Systems

  17. Type Systems For Polynomial-time Computation 

    E-Print Network [OSTI]

    Hofmann, Martin

    This thesis introduces and studies a typed lambda calculus with higher-order primitive recursion over inductive datatypes which has the property that all definable number-theoretic functions are polynomial time computable. ...

  18. Classes of defense for computer systems

    E-Print Network [OSTI]

    Wolff, Josephine Charlotte Paulina

    2015-01-01

    Computer security incidents often involve attackers acquiring a complex sequence of escalating capabilities and executing those capabilities across a range of different intermediary actors in order to achieve their ultimate ...

  19. Power System Analysis Department of Electrical and Computer Engineering

    E-Print Network [OSTI]

    Saskatchewan, University of

    EE 860.3 Power System Analysis Department of Electrical and Computer Engineering Fall 2013-14 Description: This course covers in depth main topics: 1-Analysis of faulted power systems which includes bus, classification of system buses, Gauss-Seidel and Newton-Raphson methods, 3- Power system stability; modeling

  20. Computational Modelling in Systems and Synthetic Biology

    E-Print Network [OSTI]

    Romero-Campero, Francisco J.

    modules Networks Cells Colonies Systems Biology and Synthetic Biology #12;Stochasticity is important processes. Executable semantics. o Modularity in cellular systems, especially in gene regulatory networks been successfully applied. Monika Heiner, David Gilbert, Robin Donaldson. Petri Nets for Systems

  1. Vehicle-based Control Computer Systems

    E-Print Network [OSTI]

    Auslander, David M

    1995-01-01

    Mechatronics . . . . . . . . . . . . . . . . . . . .2 Mechanical System Control: Mechatronics Mechanical systemreliability. The term mechatronics, attributed to Yasakawa

  2. Parallel Computing Environments and Methods for Power Distribution System Simulation

    SciTech Connect (OSTI)

    Lu, Ning; Taylor, Zachary T.; Chassin, David P.; Guttromson, Ross T.; Studham, Scott S.

    2005-11-10

    The development of cost-effective high-performance parallel computing on multi-processor super computers makes it attractive to port excessively time consuming simulation software from personal computers (PC) to super computes. The power distribution system simulator (PDSS) takes a bottom-up approach and simulates load at appliance level, where detailed thermal models for appliances are used. This approach works well for a small power distribution system consisting of a few thousand appliances. When the number of appliances increases, the simulation uses up the PC memory and its run time increases to a point where the approach is no longer feasible to model a practical large power distribution system. This paper presents an effort made to port a PC-based power distribution system simulator (PDSS) to a 128-processor shared-memory super computer. The paper offers an overview of the parallel computing environment and a description of the modification made to the PDSS model. The performances of the PDSS running on a standalone PC and on the super computer are compared. Future research direction of utilizing parallel computing in the power distribution system simulation is also addressed.

  3. Macro-System Model: A Federated Object Model for Cross-Cutting Analysis of Hydrogen Production, Delivery, Consumption and Associated Emissions; Preprint

    SciTech Connect (OSTI)

    Ruth, M.; Diakov, V.; Goldsby, M. E.; Sa, T. J.

    2010-12-01

    It is commonly accepted that the introduction of hydrogen as an energy carrier for light-duty vehicles involves concomitant technological development of infrastructure elements, such as production, delivery, and consumption, all associated with certain emission levels. To analyze these at a system level, the suite of corresponding models developed by the United States Department of Energy and involving several national laboratories is combined in one macro-system model (MSM). The macro-system model is being developed as a cross-cutting analysis tool that combines a set of hydrogen technology analysis models. Within the MSM, a federated simulation framework is used for consistent data transfer between the component models. The framework is built to suit cross-model as well as cross-platform data exchange and involves features of 'over-the-net' computation.

  4. Federal Acquisition Regulation; Federal Acquisition Circular...

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

    Regulation; Federal Acquisition Circular Federal Acquisition Regulation; Federal Acquisition Circular Federal Acquisition Regulation; Federal Acquisition Circular More Documents &...

  5. The Signals and Systems Approach to Quantum Computation

    E-Print Network [OSTI]

    H. Gopalkrishna Gadiyar; K. M. Sangeeta Maini; R. Padma; H. S. Sharatchandra

    2003-05-13

    In this note we point out the fact that the proper conceptual setting of quantum computation is the theory of Linear Time Invariant systems. To convince readers of the utility of the approach, we introduce a new model of computation based on the orthogonal group. This makes the link to traditional electronics engineering clear. We conjecture that the speed up achieved in quantum computation is at the cost of increased circuit complexity.

  6. Cultural kinship as a computational system: from bottom-up to top-down forms of social organization

    E-Print Network [OSTI]

    Read, Dwight W

    2012-01-01

    systems · Cultural computational systems 1 Introduction TheCultural kinship as a computational system eties from thosenumbers. To be a computational system, a kinship terminology

  7. TRL Computer System User’s Guide

    SciTech Connect (OSTI)

    Engel, David W.; Dalton, Angela C.

    2014-01-31

    We have developed a wiki-based graphical user-interface system that implements our technology readiness level (TRL) uncertainty models. This document contains the instructions for using this wiki-based system.

  8. Some Computational Problems Arising in Adaptive Optics Imaging Systems

    E-Print Network [OSTI]

    Plemmons, Robert J.

    Some Computational Problems Arising in Adaptive Optics Imaging Systems Robert J. Plemmons \\Lambda numerical linear algebra tech­ niques in adaptive optics imaging control computations. Real­time adaptive optics is a means for enhancing the resolution of ground based, optical telescopes beyond the limits

  9. Introduction to Control Theory And Its Application to Computing Systems

    E-Print Network [OSTI]

    Lu, Chenyang

    Chapter 7 Introduction to Control Theory And Its Application to Computing Systems Tarek Abdelzaher the design of feedback control in an ad hoc manner. Control theory provides a systematic ap- proach to their steady state values. This pa- per provides an introduction to control theory for computing practitioners

  10. 2014-07-09 Issuance: Energy Conservation Standards for Computer and Battery Backup Systems; Notice of Public Meeting and Availability of Framework Document

    Broader source: Energy.gov [DOE]

    This document is a pre-publication Federal Register notice of public meeting and availability of framework document for computer and battery backup systems, as issued by the Deputy Assistant Secretary for Energy Efficiency on July 9, 2014. Though it is not inteded or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

  11. Computational Chemical Dynamics of Complex Systems University of Minnesota

    E-Print Network [OSTI]

    Truhlar, Donald G

    Computational Chemical Dynamics of Complex Systems University of Minnesota Accuracy of density functionals for Pd(PH3)2L complexes where L is ethene or a conjugated CnHn+2 system (n = 4, 6, 8, and 10) Pd large when the size of the conjugated system is increased. We carried out accurate benchmark

  12. Cloudy Computing: Leveraging Weather Forecasts in Energy Harvesting Sensor Systems

    E-Print Network [OSTI]

    Shenoy, Prashant

    Cloudy Computing: Leveraging Weather Forecasts in Energy Harvesting Sensor Systems Navin Sharma,gummeson,irwin,shenoy}@cs.umass.edu Abstract--To sustain perpetual operation, systems that harvest environmental energy must carefully regulate their usage to satisfy their demand. Regulating energy usage is challenging if a system's demands

  13. u Computer Systems Research: Past and Future u Butler Lampson

    E-Print Network [OSTI]

    Arpaci-Dusseau, Remzi

    , was not made by computer systems researchers. In the light of all this experience, I will talk about the topics) Flaky for Ole/COM #12;888 The Failure of Systems Research u We didn't invent the Web u Why not? Too lighting, occlusion, noise, etc. ­ Recognizing speech and objects ­ In real time u Self-organizing systems

  14. 6.033 Computer System Engineering (SMA 5501), Spring 2005

    E-Print Network [OSTI]

    Balakrishnan, Hari

    Topics on the engineering of computer software and hardware systems: techniques for controlling complexity; strong modularity using client-server design, virtual memory, and threads; networks; atomicity and coordination ...

  15. Edinburgh Research Explorer Computational models in systems biology

    E-Print Network [OSTI]

    Millar, Andrew J.

    called process algebras and Petri nets offer alternative ways of constructing computational systems networks in an abstract way that is independent of particular mathe- matical techniques of analysis. Access

  16. Music with Unconventional Computing: A System for Physarum Polycephalum Sound

    E-Print Network [OSTI]

    Miranda, Eduardo Reck

    other than the conventional Von Neumann architecture and Turing machine, which have dominated computing, chemical and physical systems, and how they may be exploited as either a genuine or utopian compu- tational

  17. When is a workaround? Conflict & negotiation in computer systems development 

    E-Print Network [OSTI]

    Pollock, N.

    2005-01-01

    designed or intended are also shapers of technology. Using the language and concerns of actor network theory, and focusing on recent developments within computer systems implementation, this article seeks to explore and add to our understanding of work...

  18. Optical design and characterization of an advanced computational imaging system

    E-Print Network [OSTI]

    Shepard III, R. Hamilton

    We describe an advanced computational imaging system with an optical architecture that enables simultaneous and dynamic pupil-plane and image-plane coding accommodating several task-specific applications. We assess the ...

  19. Toward real-time communication using brain-computer interface systems

    E-Print Network [OSTI]

    Speier, William Farran

    2015-01-01

    Unsupervised training of brain-computer interface systemsSingle Trial EEG: Towards Brain Computer Interfacing. AdvK. (2006) The Berlin brain-computer interface presents the

  20. Forward and adjoint sensitivity computation of chaotic dynamical systems

    SciTech Connect (OSTI)

    Wang, Qiqi, E-mail: qiqi@mit.edu [Department of Aeronautics and Astronautics, MIT, 77 Mass Ave., Cambridge, MA 02139 (United States)] [Department of Aeronautics and Astronautics, MIT, 77 Mass Ave., Cambridge, MA 02139 (United States)

    2013-02-15

    This paper describes a forward algorithm and an adjoint algorithm for computing sensitivity derivatives in chaotic dynamical systems, such as the Lorenz attractor. The algorithms compute the derivative of long time averaged “statistical” quantities to infinitesimal perturbations of the system parameters. The algorithms are demonstrated on the Lorenz attractor. We show that sensitivity derivatives of statistical quantities can be accurately estimated using a single, short trajectory (over a time interval of 20) on the Lorenz attractor.

  1. Computer-aided visualization and analysis system for sequence evaluation

    DOE Patents [OSTI]

    Chee, M.S.

    1998-08-18

    A computer system for analyzing nucleic acid sequences is provided. The computer system is used to perform multiple methods for determining unknown bases by analyzing the fluorescence intensities of hybridized nucleic acid probes. The results of individual experiments are improved by processing nucleic acid sequences together. Comparative analysis of multiple experiments is also provided by displaying reference sequences in one area and sample sequences in another area on a display device. 27 figs.

  2. NERSC seeks Computational Systems Group Lead

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

    overload. Establish and implement measurements, reports and procedures to ensure that systems are operating at maximum efficiency and reliability consistent with the need to...

  3. Appendix F Computer System Retirement Guidelines

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

    1997-05-21

    The guide establishes the process for the orderly retirement of information systems regardless of software platform or size, both classified and unclassified.

  4. Cluster state quantum computation for many-level systems

    E-Print Network [OSTI]

    William Hall

    2006-06-08

    The cluster state model for quantum computation [Phys. Rev. Lett. 86, 5188] outlines a scheme that allows one to use measurement on a large set of entangled quantum systems in what is known as a cluster state to undertake quantum computations. The model itself and many works dedicated to it involve using entangled qubits. In this paper we consider the issue of using entangled qudits instead. We present a complete framework for cluster state quantum computation using qudits, which not only contains the features of the original qubit model but also contains the new idea of adaptive computation: via a change in the classical computation that helps to correct the errors that are inherent in the model, the implemented quantum computation can be changed. This feature arises through the extra degrees of freedom that appear when using qudits. Finally, for prime dimensions, we give a very explicit description of the model, making use of mutually unbiased bases.

  5. Dynamics of Josephson junction systems in the computational subspace

    E-Print Network [OSTI]

    Wang Xiang-Bin; Matsumoto Keiji; Fan Heng; Y. Nakamura

    2001-12-05

    The quantum dynamics of the Josephson junction system in the computational subspace is investigated. A scheme for the controlled not operation is given for two capasitively coupled SQUIDs. In this system, there is no systematic error for the two qubit operation. For the inductively coupled SQUIDs, the effective Hamiltonian causes systematic errors in the computational subspace for the two qubit operation. Using the purterbation theory, we construct a more precise effective Hamiltonian. This new effective Hamiltonian reduces the systematic error to the level much lower than the threshold of the fault resilent quantum computation.

  6. ELECTRICAL & COMPUTER SYSTEMS ENGINEERING UNDERGRADUATE BOOKLET 07/15 RENSSELAER POLYTECHNIC INSTITUTE

    E-Print Network [OSTI]

    McLaughlin, Joyce R.

    ELECTRICAL & COMPUTER SYSTEMS ENGINEERING UNDERGRADUATE BOOKLET 07/15 RENSSELAER POLYTECHNIC INSTITUTE School of Engineering Department of Electrical, Computer, & Systems Engineering ECSE Class of 2019 Advising Book #12;ELECTRICAL & COMPUTER SYSTEMS ENGINEERING UNDERGRADUATE BOOKLET 07/15 Table of Contents

  7. Integrated computational system for portable retinal imaging

    E-Print Network [OSTI]

    Boggess, Jason (Jason Robert)

    2012-01-01

    This thesis introduces a system to improve image quality obtained from a low-light CMOS camera-specifically designed to image the surface of the retina. The retinal tissue, as well as having various diseases of its own, ...

  8. TOWARD HIGHLY SECURE AND AUTONOMIC COMPUTING SYSTEMS: A HIERARCHICAL APPROACH

    SciTech Connect (OSTI)

    Lee, Hsien-Hsin S

    2010-05-11

    The overall objective of this research project is to develop novel architectural techniques as well as system software to achieve a highly secure and intrusion-tolerant computing system. Such system will be autonomous, self-adapting, introspective, with self-healing capability under the circumstances of improper operations, abnormal workloads, and malicious attacks. The scope of this research includes: (1) System-wide, unified introspection techniques for autonomic systems, (2) Secure information-flow microarchitecture, (3) Memory-centric security architecture, (4) Authentication control and its implication to security, (5) Digital right management, (5) Microarchitectural denial-of-service attacks on shared resources. During the period of the project, we developed several architectural techniques and system software for achieving a robust, secure, and reliable computing system toward our goal.

  9. BACHELOR OF SCIENCE COMPUTER INFORMATION SYSTEMS & TECHNOLOGY

    E-Print Network [OSTI]

    Benos, Panayiotis "Takis"

    ST TERM CREDITS FIRST YEAR, 2ND TERM CREDITS FS 0102 Freshman Seminar 3 ENG 0102 English Composition Credits Per Academic Year 30 SECOND YEAR, 1ST TERM CREDITS SECOND YEAR, 2ND TERM CREDITS CIST 262 Systems Academic Year 31 THIRD YEAR, 1ST TERM CREDITS THIRD YEAR, 2ND TERM CREDITS CIST 1311 Electronic Commerce 3

  10. Computation of Shear Viscosity: A Systems Approach

    E-Print Network [OSTI]

    Wen, John Ting-Yung

    Institute Troy, NY 12180. Emails: {hurstj,wenj}@rpi.edu Abstract-- Macroscopic material transport properties. Linearizing this map about an equilibrated trajectory results in a linear time varying system. By freezing]. In particular, macroscopic transport properties such as viscosity, diffusivity, conductivity, etc., may

  11. DESIGNING EFFICIENT MEMORY FOR FUTURE COMPUTING SYSTEMS

    E-Print Network [OSTI]

    Balasubramonian, Rajeev

    , limited pin counts, increasing heterogeneity and complexity, and the diminished importance of cost main memory system with the following innovative features: (i) overfetch-aware re-organized chips, (ii) low-cost silicon photonic memory channels, (iii) largely autonomous memory modules with a packet

  12. high-performance computing networked embedded systems

    E-Print Network [OSTI]

    Kareem, Ahsan

    generation of urban structures? Modeling technologies have changed over the years, but cityscapes have also with the inevitable. The only argument available with an east wind is to put on your overcoat." Change is inevitable into the "east wind," they are leading the way in developing network embedded systems for research in disciplines

  13. Template based parallel checkpointing in a massively parallel computer system

    DOE Patents [OSTI]

    Archer, Charles Jens (Rochester, MN); Inglett, Todd Alan (Rochester, MN)

    2009-01-13

    A method and apparatus for a template based parallel checkpoint save for a massively parallel super computer system using a parallel variation of the rsync protocol, and network broadcast. In preferred embodiments, the checkpoint data for each node is compared to a template checkpoint file that resides in the storage and that was previously produced. Embodiments herein greatly decrease the amount of data that must be transmitted and stored for faster checkpointing and increased efficiency of the computer system. Embodiments are directed to a parallel computer system with nodes arranged in a cluster with a high speed interconnect that can perform broadcast communication. The checkpoint contains a set of actual small data blocks with their corresponding checksums from all nodes in the system. The data blocks may be compressed using conventional non-lossy data compression algorithms to further reduce the overall checkpoint size.

  14. Unintended effects of federal transportation policy: a look at the lifecycle costs of the interstate system

    E-Print Network [OSTI]

    Lukmann, Andrew T

    2009-01-01

    The federal surface transportation program in the United States stands at a crossroads. Short on money and lacking vision, the program is in need of reevaluation and reform. This thesis attempts to illustrate the current ...

  15. System Overview | Argonne Leadership Computing Facility

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel Production 1:PhysicsSyndicated Content System Overview

  16. Computational Design and Experimental Validation of New Thermal Barrier Systems

    SciTech Connect (OSTI)

    Guo, Shengmin; Yang, Shizhong; Khosravi, Ebrahim

    2012-10-01

    This project (10/01/2010-9/30/2013), “Computational Design and Experimental Validation of New Thermal Barrier Systems”, originates from Louisiana State University (LSU) Mechanical Engineering Department and Southern University (SU) Department of Computer Science. This project will directly support the technical goals specified in DEFOA- 0000248, Topic Area 3: Turbine Materials, by addressing key technologies needed to enable the development of advanced turbines and turbine-based systems that will operate safely and efficiently using coal-derived synthesis gases. We will develop and implement novel molecular dynamics method to improve the efficiency of simulation on novel TBC materials; perform high performance computing (HPC) on complex TBC structures to screen the most promising TBC compositions; perform material characterizations and oxidation/corrosion tests; and demonstrate our new thermal barrier coating (TBC) systems experimentally under integrated gasification combined cycle (IGCC) environments. The durability of the coating will be examined using the proposed Durability Test Rig.

  17. Computational Design and Experimental Validation of New Thermal Barrier Systems

    SciTech Connect (OSTI)

    Guo, Shengmin; Yang, Shizhong; Khosravi, Ebrahim

    2014-04-01

    This project (10/01/2010-9/30/2014), “Computational Design and Experimental Validation of New Thermal Barrier Systems”, originates from Louisiana State University (LSU) Mechanical Engineering Department and Southern University (SU) Department of Computer Science. This project will directly support the technical goals specified in DE-FOA-0000248, Topic Area 3: Turbine Materials, by addressing key technologies needed to enable the development of advanced turbines and turbine-based systems that will operate safely and efficiently using coal-derived synthesis gases. In this project, the focus is to develop and implement novel molecular dynamics method to improve the efficiency of simulation on novel TBC materials; perform high performance computing (HPC) on complex TBC structures to screen the most promising TBC compositions; perform material characterizations and oxidation/corrosion tests; and demonstrate our new thermal barrier coating (TBC) systems experimentally under integrated gasification combined cycle (IGCC) environments.

  18. Biological Computation as the Revolution of Complex Engineered Systems

    E-Print Network [OSTI]

    Gómez-Cruz, Nelson Alfonso

    2011-01-01

    Provided that there is no theoretical frame for complex engineered systems (CES) as yet, this paper claims that bio-inspired engineering can help provide such a frame. Within CES bio-inspired systems play a key role. The disclosure from bio-inspired systems and biological computation has not been sufficiently worked out, however. Biological computation is to be taken as the processing of information by living systems that is carried out in polynomial time, i.e., efficiently; such processing however is grasped by current science and research as an intractable problem (for instance, the protein folding problem). A remark is needed here: P versus NP problems should be well defined and delimited but biological computation problems are not. The shift from conventional engineering to bio-inspired engineering needs bring the subject (or problem) of computability to a new level. Within the frame of computation, so far, the prevailing paradigm is still the Turing-Church thesis. In other words, conventional engineering...

  19. Computer systems and software description for gas characterization system

    SciTech Connect (OSTI)

    Vo, C.V.

    1997-04-01

    The Gas Characterization System Project was commissioned by TWRS management with funding from TWRS Safety, on December 1, 1994. The project objective is to establish an instrumentation system to measure flammable gas concentrations in the vapor space of selected watch list tanks, starting with tank AN-105 and AW-101. Data collected by this system is meant to support first tank characterization, then tank safety. System design is premised upon Characterization rather than mitigation, therefore redundancy is not required.

  20. Communication with U.S. federal decision makers : a primer with notes on the use of computer models as a means of communication.

    SciTech Connect (OSTI)

    Webb, Erik Karl; Tidwell, Vincent Carroll

    2009-10-01

    This document outlines ways to more effectively communicate with U.S. Federal decision makers by outlining the structure, authority, and motivations of various Federal groups, how to find the trusted advisors, and how to structure communication. All three branches of Federal governments have decision makers engaged in resolving major policy issues. The Legislative Branch (Congress) negotiates the authority and the resources that can be used by the Executive Branch. The Executive Branch has some latitude in implementation and prioritizing resources. The Judicial Branch resolves disputes. The goal of all decision makers is to choose and implement the option that best fits the needs and wants of the community. However, understanding the risk of technical, political and/or financial infeasibility and possible unintended consequences is extremely difficult. Primarily, decision makers are supported in their deliberations by trusted advisors who engage in the analysis of options as well as the day-to-day tasks associated with multi-party negotiations. In the best case, the trusted advisors use many sources of information to inform the process including the opinion of experts and if possible predictive analysis from which they can evaluate the projected consequences of their decisions. The paper covers the following: (1) Understanding Executive and Legislative decision makers - What can these decision makers do? (2) Finding the target audience - Who are the internal and external trusted advisors? (3) Packaging the message - How do we parse and integrate information, and how do we use computer simulation or models in policy communication?

  1. Development of a proton Computed Tomography Detector System

    E-Print Network [OSTI]

    Naimuddin, Md; Blazey, G; Boi, S; Dyshkant, A; Erdelyi, B; Hedin, D; Johnson, E; Krider, J; Rukalin, V; Uzunyan, S A; Zutshi, V; Fordt, R; Sellberg, G; Rauch, J E; Roman, M; Rubinov, P; Wilson, P

    2015-01-01

    Computer tomography is one of the most promising new methods to image abnormal tissues inside the human body. Tomography is also used to position the patient accurately before radiation therapy. Hadron therapy for treating cancer has become one of the most advantageous and safe options. In order to fully utilize the advantages of hadron therapy, there is a necessity of performing radiography with hadrons as well. In this paper we present the development of a proton computed tomography system. Our second-generation proton tomography system consists of two upstream and two downstream trackers made up of fibers as active material and a range detector consisting of plastic scintillators. We present details of the detector system, readout electronics, and data acquisition system as well as the commissioning of the entire system. We also present preliminary results from the test beam of the range detector.

  2. Computing fractal dimension in supertransient systems directly, fast and reliable

    E-Print Network [OSTI]

    Romulus Breban; Helena E. Nusse

    2006-08-07

    Chaotic transients occur in many experiments including those in fluids, in simulations of the plane Couette flow, and in coupled map lattices and they are a common phenomena in dynamical systems. Superlong chaotic transients are caused by the presence of chaotic saddles whose stable sets have fractal dimensions that are close to phase-space dimension. For many physical systems chaotic saddles have a big impact on laboratory measurements, and it is important to compute the dimension of such stable sets including fractal basin boundaries through a direct method. In this work, we present a new method to compute the dimension of stable sets of chaotic saddles directly, fast, and reliable.

  3. Local rollback for fault-tolerance in parallel computing systems

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Yorktown Heights, NY); Chen, Dong (Yorktown Heights, NY); Gara, Alan (Yorktown Heights, NY); Giampapa, Mark E. (Yorktown Heights, NY); Heidelberger, Philip (Yorktown Heights, NY); Ohmacht, Martin (Yorktown Heights, NY); Steinmacher-Burow, Burkhard (Boeblingen, DE); Sugavanam, Krishnan (Yorktown Heights, NY)

    2012-01-24

    A control logic device performs a local rollback in a parallel super computing system. The super computing system includes at least one cache memory device. The control logic device determines a local rollback interval. The control logic device runs at least one instruction in the local rollback interval. The control logic device evaluates whether an unrecoverable condition occurs while running the at least one instruction during the local rollback interval. The control logic device checks whether an error occurs during the local rollback. The control logic device restarts the local rollback interval if the error occurs and the unrecoverable condition does not occur during the local rollback interval.

  4. Small file aggregation in a parallel computing system

    DOE Patents [OSTI]

    Faibish, Sorin; Bent, John M.; Tzelnic, Percy; Grider, Gary; Zhang, Jingwang

    2014-09-02

    Techniques are provided for small file aggregation in a parallel computing system. An exemplary method for storing a plurality of files generated by a plurality of processes in a parallel computing system comprises aggregating the plurality of files into a single aggregated file; and generating metadata for the single aggregated file. The metadata comprises an offset and a length of each of the plurality of files in the single aggregated file. The metadata can be used to unpack one or more of the files from the single aggregated file.

  5. Clock distribution system for digital computers

    DOE Patents [OSTI]

    Wyman, Robert H. (Brentwood, CA); Loomis, Jr., Herschel H. (Davis, CA)

    1981-01-01

    Apparatus for eliminating, in each clock distribution amplifier of a clock distribution system, sequential pulse catch-up error due to one pulse "overtaking" a prior clock pulse. The apparatus includes timing means to produce a periodic electromagnetic signal with a fundamental frequency having a fundamental frequency component V'.sub.01 (t); an array of N signal characteristic detector means, with detector means No. 1 receiving the timing means signal and producing a change-of-state signal V.sub.1 (t) in response to receipt of a signal above a predetermined threshold; N substantially identical filter means, one filter means being operatively associated with each detector means, for receiving the change-of-state signal V.sub.n (t) and producing a modified change-of-state signal V'.sub.n (t) (n=1, . . . , N) having a fundamental frequency component that is substantially proportional to V'.sub.01 (t-.theta..sub.n (t) with a cumulative phase shift .theta..sub.n (t) having a time derivative that may be made uniformly and arbitrarily small; and with the detector means n+1 (1.ltoreq.n

  6. NIST Computer Security Division csrc.nist.gov Supplemental Guidance on

    E-Print Network [OSTI]

    -03, Enhancing the Security of Federal Information and Information Systems, stated that, "Our nation's security monitoring, or security authorization. Keywords Federal Information Security Management Act, Information Information For additional information on NIST's Computer Security Division programs, projects

  7. Information Systems and Computing/Office of Information Security www.upenn.edu/computing/security security@isc.upenn.edu

    E-Print Network [OSTI]

    Fang-Yen, Christopher

    ". And Penn actually offers a couple of "home grown" cloud services for secure file sharing and transferInformation Systems and Computing/Office of Information Security www.upenn.edu/computing/security security@isc.upenn.edu "phishing"...? Information Systems and Computing/Office of Information Security

  8. Computer Modeling and Simulation of an Active Vision Camera System MingChin Lu

    E-Print Network [OSTI]

    Subbarao, Murali "Rao"

    Computer Modeling and Simulation of an Active Vision Camera System Ming­Chin Lu Communications of computer simulation systems. Computer simulation avoids the necessity of building actual camera systems. Based on the proposed model and algorithms, a computer simulation system called Active Vision Simulator

  9. Intrusion Detection 1 02/09/00 Computer System Intrusion Detection

    E-Print Network [OSTI]

    Lee, Ruby B.

    Intrusion Detection 1 02/09/00 Computer System Intrusion Detection: A Survey1 Anita K. Jones in computer systems increases in importance as computers are increasingly integrated into the systems that we detection as performed in software in the context of operating systems for a single computer, a distributed

  10. Federal Communications Commission FCC 02-48 Federal Communications Commission

    E-Print Network [OSTI]

    Federal Communications Commission FCC 02-48 Before the Federal Communications Commission Washington-Wideband Transmission Systems ) ) ) ) ) ) ET Docket 98-153 FIRST REPORT AND ORDER Adopted: February 14, 2002 Released. Imaging Systems

  11. Computational Proteomics: High-throughput Analysis for Systems Biology

    SciTech Connect (OSTI)

    Cannon, William R.; Webb-Robertson, Bobbie-Jo M.

    2007-01-03

    High-throughput (HTP) proteomics is a rapidly developing field that offers the global profiling of proteins from a biological system. The HTP technological advances are fueling a revolution in biology, enabling analyses at the scales of entire systems (e.g., whole cells, tumors, or environmental communities). However, simply identifying the proteins in a cell is insufficient for understanding the underlying complexity and operating mechanisms of the overall system. Systems level investigations are relying more and more on computational analyses, especially in the field of proteomics generating large-scale global data.

  12. The use of information technology security assessment criteria to protect specialized computer systems

    SciTech Connect (OSTI)

    Lykov, V.A.; Shein, A.V.; Piskarev, A.S.; Devaney, D.M.; Melton, R.B.; Hunteman, W.J.; Prommel, J.M.; Rothfuss, J.S.

    1997-10-01

    The purpose of this paper is to discuss the information security assessment criteria used in Russia and compare it with that used in the United States. The computer system security assessment criteria utilized by the State Technical Commission of Russia and similar criteria utilized by the US Department of Defense (TCSEC) are intended for the development and implementation of proven methods for achieving a required level of information security. These criteria are utilized, first and foremost, when conducting certification assessments of general purpose systems. The Russian Federation is creating specialized systems for nuclear material control and accountancy (MC and A) within the framework of the international laboratory-to-laboratory collaboration. Depending on the conditions in which the MC and A system is intended to operate, some of the criteria and the attendant certification requirements may exceed those established or may overlap the requirements established for attestation of such systems. In this regard it is possible to modify the certification and attestation requirements depending on the conditions in which a system will operate in order to achieve the ultimate goal--implementation of the systems in the industry.

  13. Reverse Integration for Computing Stationary Points of Unstable Stiff Systems

    E-Print Network [OSTI]

    C. W. Gear; Ioannis Kevrekidis

    2003-02-24

    Using existing, forward-in-time integration schemes, we demonstrate that it is possible to compute unstable, saddle-type fixed points of stiff systems of ODEs when the stable compenents are fast (i.e., rapidly damped) while the unstable components are slow. The approach has implications for the reverse (backward in time) integration of such stiff systems, and for the coarse reverse integration of microscopic/stochastic simulations.

  14. Computer safeguards system for the IAEA inspectors at GCEP

    SciTech Connect (OSTI)

    Baker, A.L.; Harris, P.W.; Fienning, W.C.

    1983-01-01

    The Safeguards Data System (SDS), which is being developed to provide improved safeguards for the Gas Centrifuge Enrichment Plant at Portsmouth, Ohio, is described. The SDS is an automated, integrated computer data acquisition and data management system. It is designed to operate in a continuous unattended mode to provide attributes measurements, summary materials accounting data, and on-site data analysis capability to the IAEA inspectors at the GCEP facility.

  15. Computer controlled feed delivery system for feed trucks 

    E-Print Network [OSTI]

    Holt, Gregory Alan

    1989-01-01

    COMPUTER CONTROLLED FEED DELIVERY SYSTEM FOR FEED TRUCKS A Thesis by GREGORY ALAN HOLT Submitted to the Office of Graduate Studies of Texas ABM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August... 1989 Major Subject: Agricultural Engineering COMPIJIER CONTROLLED FEED DELIVERY SYSTEM FOR FEED TRUCKS A Thesis by GREGORY ALAN HOLT Approved as to style and content by: Calvin B. Parnell (Chair of Committee) ayne LePori (Member) Charlie G...

  16. The design of a system architecture for mobile multimedia computers

    E-Print Network [OSTI]

    Havinga, Paul J.M.

    for handling multimedia applications energy efficiently. Because battery life is limited and battery weight Companion, which provides support for handling multimedia applications energy efficiently. The MobileThe design of a system architecture for mobile multimedia computers This chapter1 discusses

  17. EEE 481 Computer Controlled Systems (4) [S] Course (Catalogue) Description

    E-Print Network [OSTI]

    Zhang, Junshan

    -Host communications and MATLAB programming. 4. A/D-D/A converters. 5. Modeling and implementation of a virtual heat software to implement embedded controllers. Course Topics: 1. Examples of computer controlled systems Open transfer experiment; PID control. 6. Implementation of simple least-squares and Kalman filter estimators

  18. Systems for Human-Powered Mobile Computing Joseph A. Paradiso

    E-Print Network [OSTI]

    Systems for Human-Powered Mobile Computing Joseph A. Paradiso Responsive Environments Group MIT and obtrusive. On the other hand, having humans actively drive generators used to power electronics (e of human body sources and activities. After summarizing different energy harvesting modalities

  19. Computation and representation in the primate visual system

    E-Print Network [OSTI]

    Simoncelli, Eero

    ; Matt Haxby and Mike Brotzman, for the nights playing video games; and Anne Lind, for supportComputation and representation in the primate visual system Jeremy Freeman A dissertation submitted, and Peter Li. Each taught me to think in a new way. And thanks to my family, for encouraging my passions

  20. 2010 Graduate, Computer Information Systems Home Town: Alexandria, LA

    E-Print Network [OSTI]

    Selmic, Sandra

    2010 Graduate, Computer Information Systems Home Town: Alexandria, LA Anthony Helms Exxon Mobil graduating and what you are doing now. I have been with ExxonMobil for almost 5 years. Since I started, I and implementations. My favorite part of working at ExxonMobil is having the opportunity to progress my career

  1. A COMPUTER GRAPHICS SYSTEM FOR EXAMINING PAINT COLOR COLLECTIONS

    E-Print Network [OSTI]

    Meyer, Gary

    A COMPUTER GRAPHICS SYSTEM FOR EXAMINING PAINT COLOR COLLECTIONS Seth Berrier1, 2 , Gary Meyer1, 2 for organizing and displaying the colors in a paint collection is presented. A virtual representation interface for selecting a color from the collection. Software for visualizing a paint color on a three

  2. Active I/O Switches in System Area Networks Computer Systems Laboratory

    E-Print Network [OSTI]

    Heinrich, Mark

    Active I/O Switches in System Area Networks Ming Hao Computer Systems Laboratory Cornell University, FL 32816 heinrich@cs.ucf.edu Abstract We present an active switch architecture to improve the performance of systems connected via system area networks. Our programmable active switches not only flexibly

  3. Power System Probabilistic and Security Analysis on Commodity High Performance Computing Systems

    E-Print Network [OSTI]

    Franchetti, Franz

    Power System Probabilistic and Security Analysis on Commodity High Performance Computing Systems approaches for com- prehensive system analysis. The large-varying grid condi- tion on the aging and stressed power system infrastructures also requires merging of offline security analyses into on- line operation

  4. Imaging and modeling of flow in porous media using clinical nuclear emission tomography systems and computational fluid dynamics

    E-Print Network [OSTI]

    Boutchko, R.

    2014-01-01

    emission tomography systems and computational fluid dynamicsa computational ?uid dynamics (CFD) model of the systemthe computational domain. A Cartesian coordinate system was

  5. Characterizing Computation-Communication Overlap in Message-Passing Systems

    SciTech Connect (OSTI)

    David E. Bernholdt; Jarek Nieplocha; P. Sadayappan; Aniruddha G. Shet; Vinod Tipparaju

    2008-01-31

    Effective overlap of computation and communication is a well understood technique for latency hiding and can yield significant performance gains for applications on high-end computers. In this report, we describe an instrumentation framework developed for messagepassing systems to characterize the degree of overlap of communication with computation in the execution of parallel applications. The inability to obtain precise time-stamps for pertinent communication events is a significant problem, and is addressed by generation of minimum and maximum bounds on achieved overlap. The overlap measures can aid application developers and system designers in investigating scalability issues. The approach has been used to instrument two MPI implementations as well as the ARMCI system. The implementation resides entirely within the communication library and thus integrates well with existing approaches that operate outside the library. The utility of the framework is demonstrated by analyzing communication-computation overlap for micro-benchmarks and the NAS benchmarks, and the insights obtained are used to modify the NAS SP benchmark, resulting in improved overlap.

  6. Characterizing Computation-Communication Overlap in Message-Passing Systems

    SciTech Connect (OSTI)

    David E. Bernholdt; Jarek Nieplocha; P. Sadayappan; Aniruddha G. Shet; Vinod Tipparaju

    2008-01-31

    Effective overlap of computation and communication is a well understood technique for latency hiding and can yield significant performance gains for applications on high-end computers. In this report, we describe an instrumentation framework developed for message-passing systems to characterize the degree of overlap of communication with computation in the execution of parallel applications. The inability to obtain precise time-stamps for pertinent communication events is a significant problem, and is addressed by generation of minimum and maximum bounds on achieved overlap. The overlap measures can aid application developers and system designers in investigating scalability issues. The approach has been used to instrument two MPI implementations as well as the ARMCI system. The implementation resides entirely within the communication library and thus integrates well with existing approaches that operate outside the library. The utility of the framework is demonstrated by analyzing communication-computation overlap for micro-benchmarks and the NAS benchmarks, and the insights obtained are used to modify the NAS SP benchmark, resulting in improved overlap.

  7. Digital data storage systems, computers, and data verification methods

    DOE Patents [OSTI]

    Groeneveld, Bennett J.; Austad, Wayne E.; Walsh, Stuart C.; Herring, Catherine A.

    2005-12-27

    Digital data storage systems, computers, and data verification methods are provided. According to a first aspect of the invention, a computer includes an interface adapted to couple with a dynamic database; and processing circuitry configured to provide a first hash from digital data stored within a portion of the dynamic database at an initial moment in time, to provide a second hash from digital data stored within the portion of the dynamic database at a subsequent moment in time, and to compare the first hash and the second hash.

  8. System and method for controlling power consumption in a computer system based on user satisfaction

    DOE Patents [OSTI]

    Yang, Lei; Dick, Robert P; Chen, Xi; Memik, Gokhan; Dinda, Peter A; Shy, Alex; Ozisikyilmaz, Berkin; Mallik, Arindam; Choudhary, Alok

    2014-04-22

    Systems and methods for controlling power consumption in a computer system. For each of a plurality of interactive applications, the method changes a frequency at which a processor of the computer system runs, receives an indication of user satisfaction, determines a relationship between the changed frequency and the user satisfaction of the interactive application, and stores the determined relationship information. The determined relationship can distinguish between different users and different interactive applications. A frequency may be selected from the discrete frequencies at which the processor of the computer system runs based on the determined relationship information for a particular user and a particular interactive application running on the processor of the computer system. The processor may be adapted to run at the selected frequency.

  9. CS262: Advanced Topics in Computer Systems Advanced Topics in Computer Systems

    E-Print Network [OSTI]

    California at Berkeley, University of

    , a DBMS, or an internet service; extending one of these systems with new functionality; or measurement A History and Evaluation of System R [in the textbook] Donald D. Chamberlin, Morton A. Astrahan, Michael W

  10. Scalable cavity quantum electrodynamics system for quantum computing

    E-Print Network [OSTI]

    Mohammad Hasan Aram; Sina Khorasani

    2015-07-18

    We introduce a new scalable cavity quantum electrodynamics platform which can be used for quantum computing. This system is composed of coupled photonic crystal (PC) cavities which their modes lie on a Dirac cone in the whole super crystal band structure. Quantum information is stored in quantum dots that are positioned inside the cavities. We show if there is just one quantum dot in the system, energy as photon is exchanged between the quantum dot and the Dirac modes sinusoidally. Meanwhile the quantum dot becomes entangled with Dirac modes. If we insert more quantum dots into the system, they also become entangled with each other.

  11. Comparison of Price-based Static and Dynamic Job Allocation Schemes for Grid Computing Systems

    E-Print Network [OSTI]

    Chronopoulos, Anthony T.

    Comparison of Price-based Static and Dynamic Job Allocation Schemes for Grid Computing Systems Antonio San Antonio, TX 78249, USA Email: atc@cs.utsa.edu Abstract--Grid computing systems are a cost-effective al- ternative to traditional high-performance computing systems. However, the computing resources

  12. Symposium on Intelligent Embedded Systems (IES 2014) at IEEE Symposium Series in Computational Intelligence 2014

    E-Print Network [OSTI]

    Alippi, Cesare

    with sensors, actuators and computational intelligence -based computing ability, permeate our daily life of Things · Intelligent sensor networks · Intelligent sensors and robotics · Intelligent measurement systems-world applications Keywords Embedded systems, fault-diagnosis systems, intelligent applications, intelligent sensors

  13. Online and Offline Computing systems in the PHENIX experiment

    E-Print Network [OSTI]

    Martin L. Purschke; for the PHENIX collaboration

    2003-05-29

    PHENIX is one of two large experiments at Brookhaven National Laboratory's Relativistic Heavy-Ion Collider (RHIC). At the time of the conference, the PHENIX experiment was about halfway through the 2003 run, which started in January 2003. In preparation for the run, the PHENIX data acquisition, the computing infrastructure, and the software have undergone several upgrades. Those upgrades boost the recorded data rate to about 100 MB/s and allow for a fast reconstruction only a few weeks after the data have been taken. As part of the upgrade, essentially all servers in the Online System have been converted from Solaris to Linux, and a new Linux computing farm has been commissioned at the experimental site that is used to prepare for a rapid offline reconstruction pass. This paper presents a general overview of PHENIX computing. We will explain the current status, the changes, choices of software and hardware, and discuss our experience with the new setup.

  14. Computer controlled MHD power consolidation and pulse generation system

    SciTech Connect (OSTI)

    Johnson, R.; Marcotte, K.; Donnelly, M.

    1990-01-01

    The major goal of this research project is to establish the feasibility of a power conversion technology which will permit the direct synthesis of computer programmable pulse power. Feasibility has been established in this project by demonstration of direct synthesis of commercial frequency power by means of computer control. The power input to the conversion system is assumed to be a Faraday connected MHD generator which may be viewed as a multi-terminal dc source and is simulated for the purpose of this demonstration by a set of dc power supplies. This consolidation/inversion (CI), process will be referred to subsequently as Pulse Amplitude Synthesis and Control (PASC). A secondary goal is to deliver a controller subsystem consisting of a computer, software, and computer interface board which can serve as one of the building blocks for a possible phase II prototype system. This report period work summarizes the accomplishments and covers the high points of the two year project. 6 refs., 41 figs.

  15. A term-rewriting system for computer quantum algebra

    E-Print Network [OSTI]

    J. J. Hudson

    2008-09-25

    Existing computer algebra packages do not fully support quantum mechanics calculations in Dirac's notation. I present the foundation for building such support: a mathematical system for the symbolic manipulation of expressions used in the invariant formalism of quantum mechanics. I first describe the essential mathematical features of the Hilbert-space invariant formalism. This is followed by a formal characterisation of all possible algebraic expressions in this formalism. This characterisation is provided in the form of a set of terms. Rewrite rules over this set of terms are then developed that correspond to allowed manipulations of the algebraic expressions. This approach is contrasted with current attempts to build invariant quantum mechanics calculations into computer algebra systems.

  16. Linear systems solvers - recent developments and implications for lattice computations

    E-Print Network [OSTI]

    Andreas Frommer

    1996-08-14

    We review the numerical analysis' understanding of Krylov subspace methods for solving (non-hermitian) systems of equations and discuss its implications for lattice gauge theory computations using the example of the Wilson fermion matrix. Our thesis is that mature methods like QMR, BiCGStab or restarted GMRES are close to optimal for the Wilson fermion matrix. Consequently, preconditioning appears to be the crucial issue for further improvements.

  17. A Study of mixing in computer simulated laminar flow systems 

    E-Print Network [OSTI]

    McFarland, Allison Anne

    1984-01-01

    1984 Major Subject: Chemical Engineering A STUDY OF MIXING IN COMPUTER SIMULATED LAMINAR FLOW SYSTEMS A Thesis by ALLISON ANNE MCFARLAND Approved as to style and content by: Gary B. Tatterson (Chairman) ries J. Glover (Member) A. Ted Watson...: Dr. Gary B. Tatterson Mixing is a process that reduces nonuniformities or gradients in composition, properties, or temperature of material in bulk. It is a basic part of many chemical engineering processes, yet the theoretical understanding...

  18. Computational Design and Experimental Validation of New Thermal Barrier Systems

    SciTech Connect (OSTI)

    Guo, Shengmin; Yang, Shizhong; Khosravi, Ebrahim

    2011-12-31

    This project (10/01/2010-9/30/2013), “Computational Design and Experimental Validation of New Thermal Barrier Systems”, originates from Louisiana State University (LSU) Mechanical Engineering Department and Southern University (SU) Department of Computer Science. This proposal will directly support the technical goals specified in DE-FOA-0000248, Topic Area 3: Turbine Materials, by addressing key technologies needed to enable the development of advanced turbines and turbine-based systems that will operate safely and efficiently using coal-derived synthesis gases. We will develop novel molecular dynamics method to improve the efficiency of simulation on novel TBC materials; we will perform high performance computing (HPC) on complex TBC structures to screen the most promising TBC compositions; we will perform material characterizations and oxidation/corrosion tests; and we will demonstrate our new Thermal barrier coating (TBC) systems experimentally under Integrated gasification combined cycle (IGCC) environments. The durability of the coating will be examined using the proposed High Temperature/High Pressure Durability Test Rig under real syngas product compositions.

  19. Power and thermal constraints of modern system-on-a-chip computer Efraim Rotem*1

    E-Print Network [OSTI]

    Ginosar, Ran

    Power and thermal constraints of modern system-on-a-chip computer Efraim Rotem*1 , Ran Ginosar2 and UltrabookTM drive the power and thermal envelopes of computer systems further down. More focus is put computer systems cannot sustain all the system on a chip components operating at their highest power

  20. On the Future of Computer Algebra Systems at the Threshold of 2010

    E-Print Network [OSTI]

    Watt, Stephen M.

    On the Future of Computer Algebra Systems at the Threshold of 2010 Stephen M. Watt University in which software systems for computer algebra could be improved if designed from scratch today rather than that would be difficult to address by incremental evolution of existing systems. Computer algebra systems

  1. Computational and Systems Biology DOI: 10.1039/b921381n

    E-Print Network [OSTI]

    Babu, M. Madan

    Computational and Systems Biology DOI: 10.1039/b921381n Over the last few decades, we have all in this themed issue of Molecular BioSystems entitled ``Computational and Systems Biology''. The excitement contains papers that use contemporary computational and systems approaches that involve analysis

  2. Comparison of theoretical and computational characteristics of dimensionality reduction methods for large-scale uncertain systems

    E-Print Network [OSTI]

    -time algorithms for computing reduced dimension models for uncertain systems. Here we present algorithms that compute lower dimensional realizations of an uncertain system, and compare their theoretical and com of the computational di- culties in handling more realistic systems. The uncertain system representation

  3. 3rd Annual Earth System Grid Federation and 3rd Annual Earth System Grid Federation and Ultrascale Visualization Climate Data Analysis Tools Face-to-Face Meeting Report December 2013

    SciTech Connect (OSTI)

    Williams, Dean N.

    2014-02-21

    The climate and weather data science community gathered December 3–5, 2013, at Lawrence Livermore National Laboratory, in Livermore, California, for the third annual Earth System Grid Federation (ESGF) and Ultra-scale Visualization Climate Data Analysis Tools (UV-CDAT) Face-to-Face (F2F) Meeting, which was hosted by the Department of Energy, National Aeronautics and Space Administration, National Oceanic and Atmospheric Administration, the European Infrastructure for the European Network of Earth System Modelling, and the Australian Department of Education. Both ESGF and UV-CDAT are global collaborations designed to develop a new generation of open-source software infrastructure that provides distributed access and analysis to observed and simulated data from the climate and weather communities. The tools and infrastructure developed under these international multi-agency collaborations are critical to understanding extreme weather conditions and long-term climate change, while the F2F meetings help to build a stronger climate and weather data science community and stronger federated software infrastructure. The 2013 F2F meeting determined requirements for existing and impending national and international community projects; enhancements needed for data distribution, analysis, and visualization infrastructure; and standards and resources needed for better collaborations.

  4. Site Controller: A System for Computer-Aided Civil Engineering and Construction

    E-Print Network [OSTI]

    Greenspun, Philip

    1993-02-01

    A revolution\\0\\0\\0 in earthmoving, a $100 billion industry, can be achieved with three components: the GPS location system, sensors and computers in bulldozers, and SITE CONTROLLER, a central computer system that ...

  5. A scalable silicon photonic chip-scale optical switch for high performance computing systems

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    A scalable silicon photonic chip-scale optical switch for high performance computing systems-scale optical switch for scalable interconnect network in high performance computing systems. The proposed

  6. Computer vs. Video Game System: Ready to Rumble in the #EnergyFaceoff...

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

    Computer vs. Video Game System: Ready to Rumble in the EnergyFaceoff Jungle Computer vs. Video Game System: Ready to Rumble in the EnergyFaceoff Jungle November 4, 2014 - 10:20am...

  7. Computational design and experimental validation of new thermal barrier systems

    SciTech Connect (OSTI)

    Guo, Shengmin

    2015-03-31

    The focus of this project is on the development of a reliable and efficient ab initio based computational high temperature material design method which can be used to assist the Thermal Barrier Coating (TBC) bond-coat and top-coat design. Experimental evaluations on the new TBCs are conducted to confirm the new TBCs’ properties. Southern University is the subcontractor on this project with a focus on the computational simulation method development. We have performed ab initio density functional theory (DFT) method and molecular dynamics simulation on screening the top coats and bond coats for gas turbine thermal barrier coating design and validation applications. For experimental validations, our focus is on the hot corrosion performance of different TBC systems. For example, for one of the top coatings studied, we examined the thermal stability of TaZr2.75O8 and confirmed it’s hot corrosion performance.

  8. Computer software design description for the integrated control and data acquisition system LDUA system

    SciTech Connect (OSTI)

    Aftanas, B.L.

    1998-08-12

    This Computer Software Design Description (CSDD) document provides the overview of the software design for all the software that is part of the integrated control and data acquisition system of the Light Duty Utility Arm System (LDUA). It describes the major software components and how they interface. It also references the documents that contain the detailed design description of the components.

  9. Search systems and computer-implemented search methods

    DOE Patents [OSTI]

    Paynhe, Deborah A.; Burtner, Edwin R.; Bohn, Shawn J.; Hampton, Shawn D.; Gillen, David S.; Henry, Michael J.

    2015-12-22

    Search systems and computer-implemented search methods are described. In one aspect, a search system includes a communications interface configured to access a plurality of data items of a collection, wherein the data items include a plurality of image objects individually comprising image data utilized to generate an image of the respective data item. The search system may include processing circuitry coupled with the communications interface and configured to process the image data of the data items of the collection to identify a plurality of image content facets which are indicative of image content contained within the images and to associate the image objects with the image content facets and a display coupled with the processing circuitry and configured to depict the image objects associated with the image content facets.

  10. Applied & Computational MathematicsChallenges for the Design and Control of Dynamic Energy Systems

    SciTech Connect (OSTI)

    Brown, D L; Burns, J A; Collis, S; Grosh, J; Jacobson, C A; Johansen, H; Mezic, I; Narayanan, S; Wetter, M

    2011-03-10

    The Energy Independence and Security Act of 2007 (EISA) was passed with the goal 'to move the United States toward greater energy independence and security.' Energy security and independence cannot be achieved unless the United States addresses the issue of energy consumption in the building sector and significantly reduces energy consumption in buildings. Commercial and residential buildings account for approximately 40% of the U.S. energy consumption and emit 50% of CO{sub 2} emissions in the U.S. which is more than twice the total energy consumption of the entire U.S. automobile and light truck fleet. A 50%-80% improvement in building energy efficiency in both new construction and in retrofitting existing buildings could significantly reduce U.S. energy consumption and mitigate climate change. Reaching these aggressive building efficiency goals will not happen without significant Federal investments in areas of computational and mathematical sciences. Applied and computational mathematics are required to enable the development of algorithms and tools to design, control and optimize energy efficient buildings. The challenge has been issued by the U.S. Secretary of Energy, Dr. Steven Chu (emphasis added): 'We need to do more transformational research at DOE including computer design tools for commercial and residential buildings that enable reductions in energy consumption of up to 80 percent with investments that will pay for themselves in less than 10 years.' On July 8-9, 2010 a team of technical experts from industry, government and academia were assembled in Arlington, Virginia to identify the challenges associated with developing and deploying newcomputational methodologies and tools thatwill address building energy efficiency. These experts concluded that investments in fundamental applied and computational mathematics will be required to build enabling technology that can be used to realize the target of 80% reductions in energy consumption. In addition the finding was that there are tools and technologies that can be assembled and deployed in the short term - the next 3-5 years - that can be used to significantly reduce the cost and time effective delivery of moderate energy savings in the U.S. building stock. Simulation tools, which are a core strength of current DOE computational research programs, provide only a part of the answer by providing a basis for simulation enabled design. New investments will be required within a broad dynamics and control research agenda which must focus on dynamics, control, optimization and simulation of multi-scale energy systems during design and operation. U.S. investments in high performance and high productivity computing (HP2C) should be leveraged and coupled with advances in dynamics and control to impact both the existing building stock through retrofits and also new construction. The essential R&D areas requiring investment are: (1) Characterizing the Dynamics of Multi-scale Energy Systems; (2) Control and Optimization Methodologies of Multi-scale Energy Systems Under Uncertainty; and (3) Multiscale Modeling and Simulation Enabled Design and Operation. The concept of using design and control specific computational tools is a new idea for the building industry. The potential payoffs in terms of accelerated design cycle times, performance optimization and optimal supervisory control to obtain and maintain energy savings are huge. Recent advances in computational power, computer science, and mathematical algorithms offer the foundations to address the control problems presented by the complex dynamics of whole building systems. The key areas for focus and associated metrics with targets for establishing competitiveness in energy efficient building design and operation are: (1) Scalability - Current methodology and tools can provide design guidance for very low energy buildings in weeks to months; what is needed is hours to days. A 50X improvement is needed. (2) Installation and commissioning - Current methodology and tools can target a three month window for commissioni

  11. Department of Electrical Engineering and Computer Science Discrete Event Systems Group

    E-Print Network [OSTI]

    Tilbury, Dawn

    Department of Electrical Engineering and Computer Science 1 Discrete Event Systems Group A Discrete 2000 #12;Department of Electrical Engineering and Computer Science 2 Discrete Event Systems Group of Electrical Engineering and Computer Science 3 Discrete Event Systems Group Requirements for Industrial

  12. Department for Analysis and Computational Number Theory Additive functions and number systems

    E-Print Network [OSTI]

    Department for Analysis and Computational Number Theory Additive functions and number systems systems April 7, 2010 1 / 35 #12;Department for Analysis and Computational Number Theory Outline Number and Computational Number Theory Number systems Let R be an integral domain, b R, and N = {n1, . . . , nm} R

  13. Fault-Adaptive Control for Robust Performance Management of Computing Systems

    E-Print Network [OSTI]

    Abdelwahed, Sherif

    Fault-Adaptive Control for Robust Performance Management of Computing Systems Sherif Abdelwahed is traced back to current state and the initial step is selected. · Future computing systems will typically, transportation, and command and control systems. To cope with the complexity expected of future computing

  14. Low-Cost Checkpointing and Failure Recovery in Mobile Computing Systems

    E-Print Network [OSTI]

    Prakash, Ravi

    Low-Cost Checkpointing and Failure Recovery in Mobile Computing Systems Ravi Prakash and Mukesh-mail: fprakash, singhalg@cis.ohio-state.edu Abstract A mobile computing system consists of mobile and stationary every node in the system to take a new local snapshot, or block the underlying computation during

  15. Dynamic System Response of Truss Panels under High Dynamic Loading through Experimental & Computation Evaluation

    E-Print Network [OSTI]

    Wadley, Haydn

    to investigate the dynamic performance of truss panel systems. Two configurations were computer simulated to correlate experimental system failure limits under dynamic load. The computer code matched the experimental was the only trusted metric of dynamic performance of system. Computer codes were too inaccurate

  16. Novel properties generated by interacting computational systems: A minimal model Fabio Boschetti1,2

    E-Print Network [OSTI]

    Boschetti, Fabio

    Novel properties generated by interacting computational systems: A minimal model Fabio questions: First, what is the smallest number of components a computational system needs in order such as selforganisation and emergence have been discussed in computational terms within Complex System Science

  17. The Robustness of Resource Allocation in Parallel and Distributed Computing Systems

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    The Robustness of Resource Allocation in Parallel and Distributed Computing Systems Shoukat Ali on the robustness of a resource allocation in parallel and distributed computing systems. What does robustness mean." In the context of resource allocation in parallel and dis- tributed computing systems, how is the concept

  18. Parameter Discovery for Stochastic Computational Models in Systems Biology Using Bayesian Model

    E-Print Network [OSTI]

    Parameter Discovery for Stochastic Computational Models in Systems Biology Using Bayesian Model--Parameterized probabilistic complex computational (P2 C2 ) models are increasingly used in computational systems biology to study biochemical and physiological systems. A key challenge is to build mechanistic P2 C2 models

  19. An AWGR based Low-Latency Optical Switch for Data Centers and High Performance Computing Systems

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    i An AWGR based Low-Latency Optical Switch for Data Centers and High Performance Computing Systems based optical switch for data centers and high performance computing systems that builds upon several for Data Centers and High Performance Computing Systems ..i ABSTRACT .....................................

  20. CPT: An Energy-Efficiency Model for Multi-core Computer Systems

    E-Print Network [OSTI]

    Shi, Weisong

    CPT: An Energy-Efficiency Model for Multi-core Computer Systems Weisong Shi, Shinan Wang and Bing efficiency of computer systems. These techniques affect the energy efficiency across different layers metric that represents the energy efficiency of a computer system, for a specific configuration, given

  1. Exact polynomial system solving for robust geometric computation 

    E-Print Network [OSTI]

    Ouchi, Koji

    2007-04-25

    (f1,...,fn) to be the non- zero coefficient of the lowest degree term in TGCP (s,u) regarded as a polynomial in variable s. Theorem 2.1. Rojas ([81] Main Theorem 2.4) TPert (u) is well-defined, i.e., for a given square system of polynomials f1,...,fn... for the degree of DOCTOR OF PHILOSOPHY Approved by: Co-Chairs of Committee, Donald Friesen John Keyser Committee Members, Jianer Chen J. Maurice Rojas Head of Department, Valerie E. Taylor December 2006 Major Subject: Computer Science iii ABSTRACT Exact...

  2. A computational system for lattice QCD with overlap Dirac quarks

    E-Print Network [OSTI]

    Ting-Wai Chiu; Tung-Han Hsieh; Chao-Hsi Huang; Tsung-Ren Huang

    2002-10-31

    We outline the essential features of a Linux PC cluster which is now being developed at National Taiwan University, and discuss how to optimize its hardware and software for lattice QCD with overlap Dirac quarks. At present, the cluster constitutes of 30 nodes, with each node consisting of one Pentium 4 processor (1.6/2.0 GHz), one Gbyte of PC800 RDRAM, one 40/80 Gbyte hard disk, and a network card. The speed of this system is estimated to be 30 Gflops, and its price/performance ratio is better than $1.0/Mflops for 64-bit (double precision) computations in quenched lattice QCD with overlap Dirac quarks.

  3. Building logical qubits in a superconducting quantum computing system

    E-Print Network [OSTI]

    Jay M. Gambetta; Jerry M. Chow; Matthias Steffen

    2015-10-15

    The technological world is in the midst of a quantum computing and quantum information revolution. Since Richard Feynman's famous "plenty of room at the bottom" lecture, hinting at the notion of novel devices employing quantum mechanics, the quantum information community has taken gigantic strides in understanding the potential applications of a quantum computer and laid the foundational requirements for building one. We believe that the next significant step will be to demonstrate a quantum memory, in which a system of interacting qubits stores an encoded logical qubit state longer than the incorporated parts. Here, we describe the important route towards a logical memory with superconducting qubits, employing a rotated version of the surface code. The current status of technology with regards to interconnected superconducting-qubit networks will be described and near-term areas of focus to improve devices will be identified. Overall, the progress in this exciting field has been astounding, but we are at an important turning point where it will be critical to incorporate engineering solutions with quantum architectural considerations, laying the foundation towards scalable fault-tolerant quantum computers in the near future.

  4. Federal participation in LEED

    SciTech Connect (OSTI)

    Payne, Christopher; Dyer, Beverly

    2004-11-10

    The federal government has been an active participant in the development and use of USGBC's Leadership in Energy & Environmental Design Green Building Rating System (LEED). This paper presents a review of this participation and some expectations for ongoing partnership.

  5. Research Positions in Big Data Computational Biology Department of Computational and Systems Biology

    E-Print Network [OSTI]

    Benos, Takis

    Research Positions in Big Data Computational Biology Department of Computational and clinical data related to melanoma and chronic lung diseases. The ideal, and will have research experience in computational biology. 2. One Data Scientist

  6. Data analysis using the Gnu R system for statistical computation

    SciTech Connect (OSTI)

    Simone, James; /Fermilab

    2011-07-01

    R is a language system for statistical computation. It is widely used in statistics, bioinformatics, machine learning, data mining, quantitative finance, and the analysis of clinical drug trials. Among the advantages of R are: it has become the standard language for developing statistical techniques, it is being actively developed by a large and growing global user community, it is open source software, it is highly portable (Linux, OS-X and Windows), it has a built-in documentation system, it produces high quality graphics and it is easily extensible with over four thousand extension library packages available covering statistics and applications. This report gives a very brief introduction to R with some examples using lattice QCD simulation results. It then discusses the development of R packages designed for chi-square minimization fits for lattice n-pt correlation functions.

  7. Computational dynamics of acoustically-driven microsphere systems

    E-Print Network [OSTI]

    Glosser, Connor A; Dault, Daniel L; Piermarocchi, Carlo; Shanker, Balasubramaniam

    2015-01-01

    We propose a computational framework for the self-consistent dynamics of a microsphere system driven by a pulsed acoustic field in an ideal fluid. Our framework combines a molecular dynamics integrator describing the dynamics of the microsphere system with a time-dependent integral equation solver for the acoustic field that makes use of fields represented as surface expansions in spherical harmonic basis functions. The presented approach allows us to describe the inter-particle interaction induced by the field as well as the dynamics of trapping in counter-propagating acoustic pulses. The integral equation formulation leads to equations of motion for the microspheres describing the effect of non-dissipative drag forces. We show (1) that the field-induced interactions between the microspheres give rise to effective dipolar interactions, with effective dipoles defined by their velocities, and (2) that the dominant effect of an ultrasound pulse through a cloud of microspheres gives rise mainly to a translation ...

  8. Wind energy conversion system analysis model (WECSAM) computer program documentation

    SciTech Connect (OSTI)

    Downey, W T; Hendrick, P L

    1982-07-01

    Described is a computer-based wind energy conversion system analysis model (WECSAM) developed to predict the technical and economic performance of wind energy conversion systems (WECS). The model is written in CDC FORTRAN V. The version described accesses a data base containing wind resource data, application loads, WECS performance characteristics, utility rates, state taxes, and state subsidies for a six state region (Minnesota, Michigan, Wisconsin, Illinois, Ohio, and Indiana). The model is designed for analysis at the county level. The computer model includes a technical performance module and an economic evaluation module. The modules can be run separately or together. The model can be run for any single user-selected county within the region or looped automatically through all counties within the region. In addition, the model has a restart capability that allows the user to modify any data-base value written to a scratch file prior to the technical or economic evaluation. Thus, any user-supplied data for WECS performance, application load, utility rates, or wind resource may be entered into the scratch file to override the default data-base value. After the model and the inputs required from the user and derived from the data base are described, the model output and the various output options that can be exercised by the user are detailed. The general operation is set forth and suggestions are made for efficient modes of operation. Sample listings of various input, output, and data-base files are appended. (LEW)

  9. CB ENCIi TEC APPL SCI Stuctual Dynamic Systems Computational Techniques

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    Airport Terminal, Liquefied Natural Gas (LNG) Facility in Greece, C-1 Computer Center Building in Japan

  10. Computer-aided engineering system for design of sequence arrays and lithographic masks

    DOE Patents [OSTI]

    Hubbell, Earl A. (Mt. View, CA); Lipshutz, Robert J. (Palo Alto, CA); Morris, Macdonald S. (San Jose, CA); Winkler, James L. (Palo Alto, CA)

    1997-01-01

    An improved set of computer tools for forming arrays. According to one aspect of the invention, a computer system is used to select probes and design the layout of an array of DNA or other polymers with certain beneficial characteristics. According to another aspect of the invention, a computer system uses chip design files to design and/or generate lithographic masks.

  11. A Mathematical Model for Virus Infection in a System of Interacting Computers

    E-Print Network [OSTI]

    Cipolatti, Rolci

    A Mathematical Model for Virus Infection in a System of Interacting Computers J. L´opez Gondar & R are explored and enlightened in this paper. 1. Introduction The infection of computers by virtual viruses of virtual viruses in a system of interacting computers could be compared with a disease transmitted

  12. Fuzzy Computing Applications for Anti-Money Laundering and Distributed Storage System Load

    E-Print Network [OSTI]

    Cortes, Corinna

    1 Fuzzy Computing Applications for Anti-Money Laundering and Distributed Storage System Load for computation. In particular, fuzzy logic allows us to use linguistic variables to model dynamic systems {ytchen, johmathe}@google.com Abstract--Fuzzy computing (FC) has made a great impact in capturing human

  13. Modeling Computational Security in Long-Lived Systems, Version 2 Ran Canetti1,2

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Modeling Computational Security in Long-Lived Systems, Version 2 Ran Canetti1,2 , Ling Cheung2 Introduction Computational security in long-lived systems: Security properties of cryptographic protocols computational power. This type of security degrades progressively over the lifetime of a protocol. However, some

  14. Modeling Computational Security in Long-Lived Systems Ran Canetti1,2

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Modeling Computational Security in Long-Lived Systems Ran Canetti1,2 , Ling Cheung2 , Dilsun Kaynar Introduction Computational security in long-lived systems: Security properties of cryptographic protocols protocols, security relies on the assumption that adversarial entities have lim- ited computational power

  15. How Quantum Computers Fail: Quantum Codes, Correlations in Physical Systems, and Noise Accumulation

    E-Print Network [OSTI]

    Kalai, Gil

    How Quantum Computers Fail: Quantum Codes, Correlations in Physical Systems, and Noise Accumulation, much of modern cryptography, as well as security in computer systems for finance and commerce are based Dedicated to the memory of Itamar Pitowsky Abstract The feasibility of computationally superior quantum

  16. Service Level Agreement-Based Joint Application Environment Assignment and Resource Allocation in Cloud Computing Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    in Cloud Computing Systems Yanzhi Wang, Shuang Chen and Massoud Pedram Department of Electrical Engineering and storage. Resource allocation is one of the most important challenges in the cloud computing system algorithms by up to 65.7%. Keywords-cloud computing; application environment; resource allocation; assignment

  17. Time-Predictable Fault Tolerant Computing for Dependable Automotive Cyber-Physical Systems

    E-Print Network [OSTI]

    Rajkumar, Ragunathan "Raj"

    1 Time-Predictable Fault Tolerant Computing for Dependable Automotive Cyber-Physical Systems Wei University wzhang@vcu.edu Dependable and secure automotive cyber-physical systems (CPSs) are crucial as human and should be bypassed in future computing. This computing platform will be incorporated and evaluated

  18. Experimental Analysis of Task-based Energy Consumption in Cloud Computing Systems

    E-Print Network [OSTI]

    Schneider, Jean-Guy

    computing, green cloud, energy consumption, performance analysis, energy efficiency. 1. INTRODUCTION Cloud in green cloud computing systems [4]. Many efforts have been made to improve the energy efficiency of cloudExperimental Analysis of Task-based Energy Consumption in Cloud Computing Systems Feifei Chen, John

  19. Systems Support for Ubiquitous Computing: A Case Study of Two Implementations of Labscape

    E-Print Network [OSTI]

    Grimm, Robert

    Systems Support for Ubiquitous Computing: A Case Study of Two Implementations of Labscape Larry, Abstract. Labscape, a ubiquitous computing environment for cell biologists, was implemented twice: once. This project was not undertaken explicitly to evaluate systems technologies for ubiquitous computing, yet we

  20. Unwanted Behavior and its Impact on Adaptive Systems in Ubiquitous Computing

    E-Print Network [OSTI]

    Cengarle, María Victoria

    Unwanted Behavior and its Impact on Adaptive Systems in Ubiquitous Computing Michael Fahrmair in mo- bile and ubiquitous computing to become reality. In this paper, we present examples from our prac aware and adaptive systems. 1 Introduction The main intention of ubiquitous computing (Ubicomp

  1. Application to Add New Computer Account or System Sponsoring/Supervising PI: ,

    E-Print Network [OSTI]

    Kurapov, Alexander

    _____________________________ Application to Add New Computer Account or System: No personally owned computer nor machines that use non-English operating systems may be connected to the CEOAS Sponsoring/Supervising PI: , Last First Complete this section if you are adding a new CEOAS computer

  2. A real-time display system for the EAI 8900 Hybrid Computer System 

    E-Print Network [OSTI]

    Phillips, Paul Jenkins

    1967-01-01

    GENERATION. 37 On-Line Display Generation Capabilities . On-Line Display Generation Procedure. . . On-Line Grid Definition and Modification. On-Line Trace Definition and Modification On-Line Active List Modification. . . . . . On-Line Control of Trace... Computer System The Display Console A Schematic Diagram of the Digital-to-Television Conversion System A Free-Form Grid. 22 A Rectangular Co-Ordinate Grid with Linear Scales. . 23 A Rectangular Co-Ordinate Grid with Semi- Logarithmic Scales 24...

  3. Computational mechanics of molecular systems: Quantifying high-dimensional dynamics by distribution of Poincare recurrence times

    E-Print Network [OSTI]

    Nerukh, Dmitry

    Computational mechanics of molecular systems: Quantifying high- dimensional dynamics computational mechanics as a bridge between deterministic chaos in nonlinear dynamical systems with few degrees-Hakodate, School of Systems Information Science, Department of Complex System, 116-2 Kamedanakano-cho, Hakodate

  4. PROTOTOUCH a system for prototyping ubiquitous computing environments mediated by touch

    E-Print Network [OSTI]

    Cranor, David (John David)

    2011-01-01

    Computers as we know them are fading into the background. However, interaction modalities developed for "foreground" computer systems are beginning to seep into the day-to-day interactions that people have with each other ...

  5. Abstract--Neuromorphic computing systems refer to the computing architecture inspired by the working mechanism of

    E-Print Network [OSTI]

    Qiu, Qinru

    of noisy document images. From a scalability standpoint on a High Performance Computing (HPC) platform we is an emerging field made possible due to the advancement in High Performance Computing (HPC) domain

  6. Implementation of the National Incident Management System (NIMS)/Incident Command System (ICS) in the Federal Radiological Monitoring and Assessment Center(FRMAC) - Emergency Phase

    SciTech Connect (OSTI)

    NSTec Environmental Restoration

    2007-04-01

    Homeland Security Presidential Directive HSPD-5 requires all federal departments and agencies to adopt a National Incident Management System (NIMS)/Incident Command System (ICS) and use it in their individual domestic incident management and emergency prevention, preparedness, response, recovery, and mitigation programs and activities, as well as in support of those actions taken to assist state and local entities. This system provides a consistent nationwide template to enable federal, state, local, and tribal governments, private-sector, and nongovernmental organizations to work together effectively and efficiently to prepare for, prevent, respond to, and recover from domestic incidents, regardless of cause, size, or complexity, including acts of catastrophic terrorism. This document identifies the operational concepts of the Federal Radiological Monitoring and Assessment Center's (FRMAC) implementation of the NIMS/ICS response structure under the National Response Plan (NRP). The construct identified here defines the basic response template to be tailored to the incident-specific response requirements. FRMAC's mission to facilitate interagency environmental data management, monitoring, sampling, analysis, and assessment and link this information to the planning and decision staff clearly places the FRMAC in the Planning Section. FRMAC is not a mitigating resource for radiological contamination but is present to conduct radiological impact assessment for public dose avoidance. Field monitoring is a fact-finding mission to support this effort directly. Decisions based on the assessed data will drive public protection and operational requirements. This organizational structure under NIMS is focused by the mission responsibilities and interface requirements following the premise to provide emergency responders with a flexible yet standardized structure for incident response activities. The coordination responsibilities outlined in the NRP are based on the NIMS/ICS construct and Unified Command (UC) for management of a domestic incident. The NRP Nuclear/Radiological Incident Annex (NUC) further provides requirements and protocols for coordinating federal government capabilities to respond to nuclear/radiological Incidents of National Significance (INS) and other radiological incidents. When a FRMAC is established, it operates under the parameters of NIMS as defined in the NRP. FRMAC and its operations have been modified to reflect NIMS/ICS concepts and principles and to facilitate working in a Unified Command structure. FRMAC is established at or near the scene of the incident to coordinate radiological monitoring and assessment and is established in coordination with the U.S. Department of Homeland Security (DHS); the coordinating agency; other federal agencies; and state, local, and tribal authorities. However, regardless of the coordinating agency designation, U.S. Department of Energy (DOE) coordinates radiological monitoring and assessment activities for the initial phases of the offsite federal incident response through the Radiological Assistance Program (RAP) and FRMAC assets. Monitoring and assessment data are managed by FRMAC in an accountable, secure, and retrievable format. Monitoring data interpretations, including exposure rate contours, dose projections, and any requested radiological assessments are to be provided to the DHS; to the coordinating agency; and to state, local, and tribal government agencies.

  7. Comments by the American Electric Power System on Proposed Coordination of Federal Authorizations for Electric Transmission Facilities

    Office of Energy Efficiency and Renewable Energy (EERE)

     Proposed Coordination of Federal Authorizations for Electric Transmission Facilities – Interim Final Rule and Proposed Rule (DOE, 10 CR Part 900): The utility operating companies of the American...

  8. Tax Credits for Home Energy Improvements: If You Buy an Energy-Efficient Product or Renewable Energy System for Your Home, You May be Eligible for a Federal Tax Credit (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-05-01

    This two-page fact sheet provides an overview of 2010 federal tax credits for energy efficient products or renewable energy systems in the home.

  9. Computer system design description for SY-101 hydrogen mitigation test project data acquisition and control system (DACS-1). Revision 1

    SciTech Connect (OSTI)

    Truitt, R.W. [Westinghouse Hanford Co., Richland, WA (United States)

    1994-08-24

    This document provides descriptions of components and tasks that are involved in the computer system for the data acquisition and control of the mitigation tests conducted on waste tank SY-101 at the Hanford Nuclear Reservation. The system was designed and implemented by Los alamos National Laboratory and supplied to Westinghouse Hanford Company. The computers (both personal computers and specialized data-taking computers) and the software programs of the system will hereafter collectively be referred to as the DACS (Data Acquisition and Control System).

  10. Acceptance of spent nuclear fuel in multiple element sealed canisters by the Federal Waste Management System

    SciTech Connect (OSTI)

    Not Available

    1990-03-01

    This report is one of a series of eight prepared by E.R. Johnson Associates, Inc. (JAI) under ORNL's contract with DOE's OCRWM Systems Integration Program and in support of the Annual Capacity Report (ACR) Issue Resolution Process. The report topics relate specifically to the list of high priority technical waste acceptance issues developed jointly by DOE and a utility-working group. JAI performed various analyses and studies on each topic to serve as starting points for further discussion and analysis leading eventually to finalizing the process by which DOE will accept spent fuel and waste into its waste management system. The eight reports are concerned with the conditions under which spent fuel and high level waste will be accepted in the following categories: (1) failed fuel; (2) consolidated fuel and associated structural parts; (3) non-fuel-assembly hardware; (4) fuel in metal storage casks; (5) fuel in multi-element sealed canisters; (6) inspection and testing requirements for wastes; (7) canister criteria; (8) spent fuel selection for delivery; and (9) defense and commercial high-level waste packages. 14 refs., 27 figs.

  11. Distributed anonymous function computation in information fusion and multiagent systems

    E-Print Network [OSTI]

    Hendrickx, Julien

    We propose a model for deterministic distributed function computation by a network of identical and anonymous nodes, with bounded computation and storage capabilities that do not scale with the network size. Our goal is ...

  12. ALiCE: A Java-based Grid Computing System

    E-Print Network [OSTI]

    Teo, Yong Meng

    A computational grid is a hardware and software infrastructure that provides dependable, consistent, pervasive, and inexpensive access to high-end computational capabilities. This talk is divided into three parts. Firstly, ...

  13. Hybrid computer simulation of atomic orbitals of one electron system 

    E-Print Network [OSTI]

    Balasubramanium, Prabaker

    1998-01-01

    quantum chemical wave equation. Generating this function is the unit level operation in molecular modeling. Therefore, analyzing the performance of the hybrid computer at this level will bring out the basic differences between hybrid computing and digital...

  14. Spacecraft computing systems with high-level specifications and FPGAs

    E-Print Network [OSTI]

    Ong, Elwin, 1979-

    2006-01-01

    A typical modem spacecraft requires computer processing in every major subsystem. The most popular method to carry out these processing requirements involves the use of a primary computer based on microprocessors. To carry ...

  15. CPS-IP: Cyber Physical Systems Interconnection Protocol Department of Computer

    E-Print Network [OSTI]

    He, Tian

    heterogeneity of CPS systems at three different levels: function interoperability, policy regulation of the devices used in cyber physical system have very limited memory, computing capability and energy, whichCPS-IP: Cyber Physical Systems Interconnection Protocol Shan Lin Department of Computer Science

  16. Computational Issues in Intelligent Control: Discrete-Event and Hybrid Systems

    E-Print Network [OSTI]

    Koutsoukos, Xenofon D.

    Computational Issues in Intelligent Control: Discrete-Event and Hybrid Systems Xenofon D discrete event and hybrid systems. Computational issues of various problems and al- gorithms concerning to address the control needs of complex systems that exhibit complicated dynamical behaviors. The design

  17. Exploiting the Eigenstructure of Linear Systems to speed up Reachability Computations

    E-Print Network [OSTI]

    Fanchon, Eric

    Exploiting the Eigenstructure of Linear Systems to speed up Reachability Computations Alexandre computations of linear systems. Furthemore, it can be applied to improve the time-efficiency of the dynamic. In this paper, we propose a method exploiting the eigenstructure of a linear continuous system to efficiently

  18. Intoduction to Complex Systems A new course for students in the Physical Sciences, Computer Sciences, and

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Intoduction to Complex Systems A new course for students in the Physical Sciences, Computer to understand the behavior of real systems. In both steps we will extensively use computers. Homework assignment Sciences, and Mathematics, by Professor Sergey Buldyrev. The definition of a complex system is somewhat

  19. ARMS: An agent-based resource management system for grid computing

    E-Print Network [OSTI]

    Jarvis, Stephen

    135 ARMS: An agent-based resource management system for grid computing Junwei Caoa, Stephen A be addressed. In this work an agent-based resource management system, ARMS, is implemented for grid computing the detailed analysis of an application and also as input to resource scheduling systems; this performance data

  20. Conclusions from the European Roadmap on Control of Computing Systems Karl-Erik Arzen

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Conclusions from the European Roadmap on Control of Computing Systems Karl-Erik °Arz´en , Anders of Exellence ARTIST2 on Embedded System Design a roadmap on Control of Real-Time Computing Systems has recently been completed. The focus of the roadmap is how flexibility, adaptivity, performance and robustness can

  1. Conclusions of the ARTIST2 Roadmap on Control of Computing Systems Karl-Erik Arzen

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Conclusions of the ARTIST2 Roadmap on Control of Computing Systems Karl-Erik °Arz´en , Anders of Exellence ARTIST2 on Embedded System Design a roadmap on Control of Real-Time Computing Systems has recently been completed. The focus of the roadmap is how flexibility, adaptivity, performance and robustness can

  2. MathCheck: A Math Assistant via a Combination of Computer Algebra Systems and

    E-Print Network [OSTI]

    Czarnecki, Krzysztof

    MathCheck: A Math Assistant via a Combination of Computer Algebra Systems and SAT Solvers Edward present a method and an associated system, called Math- Check, that embeds the functionality of a computer algebra system (CAS) within the inner loop of a conflict-driven clause-learning SAT solver. SAT

  3. PROJECT NAME: NEB Range Dam System 1. Provide the name of all non-Federal interests planning to act as the sponsor, including

    E-Print Network [OSTI]

    US Army Corps of Engineers

    PROJECT NAME: NEB Range Dam System 1. Provide the name of all non-Federal interests planning to act for the feasibility study is to determine the need to update/upgrade the dam in order to assist in our efforts), which allows for flood insurance discounts to local residents. #12;Image 1: Dam location and affected

  4. Proceedings of the The IEEE Computer Society's 12th Annual International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04)

    E-Print Network [OSTI]

    Gribaudo, Marco

    , Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004

  5. To appear in Energy Efficient Distributed Computing Systems, Editors: A. Zomaya and Y-C Lee, Wiley-IEEE Computer Society Press, Aug. 2012 and Massoud Pedram2

    E-Print Network [OSTI]

    Pedram, Massoud

    To appear in Energy Efficient Distributed Computing Systems, Editors: A. Zomaya and Y-C Lee, Wiley #12;To appear in Energy Efficient Distributed Computing Systems, Editors: A. Zomaya and Y-C Lee, Wiley................................................................................................................................................19 #12;To appear in Energy Efficient Distributed Computing Systems, Editors: A. Zomaya and Y-C Lee

  6. Analysis and computation of multiple unstable solutions to nonlinear elliptic systems 

    E-Print Network [OSTI]

    Chen, Xianjin

    2009-05-15

    We study computational theory and methods for finding multiple unstable solutions (corresponding to saddle points) to three types of nonlinear variational elliptic systems: cooperative, noncooperative, and Hamiltonian. We ...

  7. IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 2014 1 Computing Nash Equilibria in Bimatrix Games

    E-Print Network [OSTI]

    Grosu, Daniel

    IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS 2014 1 Computing Nash Equilibria in Bimatrix, Student Member, IEEE, and Daniel Grosu, Senior Member, IEEE Abstract--Computing Nash equilibria is a very enumeration algorithm for computing Nash equilibria in bimatrix games. The algorithm is based on a new

  8. Coarse-grained computations for a micellar system Dmitry I. Kopelevich,a)

    E-Print Network [OSTI]

    Coarse-grained computations for a micellar system Dmitry I. Kopelevich,a) Athanassios Z establish, through coarse-grained computation, a connection between traditional, continuum numerical-grained mesoscopic observables of the Monte Carlo simulation, and on computational time scale separation between

  9. How Computational Models Predict the Behavior of Complex Systems John Symons 1

    E-Print Network [OSTI]

    Boschetti, Fabio

    How Computational Models Predict the Behavior of Complex Systems John Symons 1 Fabio Boschetti2,3 1 of prediction in the use of computational models in science. We focus on the consequences of the irreversibility of computational models and on the conditional or ceteris paribus, nature of the kinds of their predictions

  10. An Energy-Aware Fault Tolerant Scheduling Framework for Soft Error Resilient Cloud Computing Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    An Energy-Aware Fault Tolerant Scheduling Framework for Soft Error Resilient Cloud Computing has drastically increased their susceptibility to soft errors. At the grand scale of cloud computing outputs or system crash. At the grand scale of cloud computing, this problem can only worsen [2, 3, 4, 5

  11. An Optimal Control Policy in a Mobile Cloud Computing System Based on Stochastic Data

    E-Print Network [OSTI]

    Pedram, Massoud

    An Optimal Control Policy in a Mobile Cloud Computing System Based on Stochastic Data Xue Lin Angeles, CA, USA {xuelin, yanzhiwa, pedram}@usc.edu Abstract--The emerging mobile cloud computing (MCC sum. Keywords--mobile cloud computing; remote processing; dynamic voltage and frequency scaling I

  12. A Nested Two Stage Game-Based Optimization Framework in Mobile Cloud Computing System

    E-Print Network [OSTI]

    Pedram, Massoud

    A Nested Two Stage Game-Based Optimization Framework in Mobile Cloud Computing System Yanzhi Wang Angeles, USA {yanzhiwa, xuelin, pedram}@usc.edu Abstract--The rapidly developing cloud computing to offload computation and which portion of application should be offloaded to the cloud. In this paper, we

  13. CIMSA 2005 IEEE International Conference on Computational Intelligence for Measurement Systems and Applications

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    CIMSA 2005 ­ IEEE International Conference on Computational Intelligence for Measurement Systems and Applications Giardini Naxos, Italy, 20-22 July 2005 A Soft Computing-Based Method for the Identification practices identification and analysis based on soft computing techniques. Using this new methodology "best

  14. Technical Challenges of Computing Available Transfer Capability (ATC) in Electric Power Systems

    E-Print Network [OSTI]

    Technical Challenges of Computing Available Transfer Capability (ATC) in Electric Power Systems Peter W. Sauer Department of Electrical and Computer Engineering University of Illinois at Urbana with the technical challenges of computation. 1. Introduction There has been interest in quantifying the transmission

  15. Future Generation Computer Systems 25 (2009) 599616 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Melbourne, University of

    2009-01-01

    Future Generation Computer Systems 25 (2009) 599­616 Contents lists available at Science that computing will one day be the 5th utility (after water, electricity, gas, and telephony). This computing of harnessing `Storage Clouds' for high performance content delivery. Finally, we conclude with the need

  16. Partitioning networks into communities by message passing MOE-Microsoft Laboratory for Intelligent Computing and Intelligent Systems,

    E-Print Network [OSTI]

    Nardini, Christine

    for Intelligent Computing and Intelligent Systems, Department of Computer Science and Engineering, Shanghai Jiao and Intelligent Systems, Department of Computer Science and Engineering, Shanghai Jiao Tong University, 800 Dong of Computational Biology, CAS-MPG Partner Institute for Computational Biology, Chinese Academy of Sciences, 320 Yue

  17. Evaluation of Computer-Based Procedure System Prototype

    SciTech Connect (OSTI)

    Johanna Oxstrand; Katya Le Blanc; Seth Hays

    2012-09-01

    This research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which is a research and development (R&D) program sponsored by Department of Energy (DOE), performed in close collaboration with industry R&D programs, to provide the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. The LWRS program serves to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. The introduction of advanced technology in existing nuclear power plants may help to manage the effects of aging systems, structures, and components. In addition, the incorporation of advanced technology in the existing LWR fleet may entice the future workforce, who will be familiar with advanced technology, to work for these utilities rather than more newly built nuclear power plants. Advantages are being sought by developing and deploying technologies that will increase safety and efficiency. One significant opportunity for existing plants to increase efficiency is to phase out the paper-based procedures (PBPs) currently used at most nuclear power plants and replace them, where feasible, with computer-based procedures (CBPs). PBPs have ensured safe operation of plants for decades, but limitations in paper-based systems do not allow them to reach the full potential for procedures to prevent human errors. The environment in a nuclear power plant is constantly changing depending on current plant status and operating mode. PBPs, which are static by nature, are being applied to a constantly changing context. This constraint often results in PBPs that are written in a manner that is intended to cover many potential operating scenarios. Hence, the procedure layout forces the operator to search through a large amount of irrelevant information to locate the pieces of information relevant for the task and situation at hand, which has potential consequences of taking up valuable time when operators must be responding to the situation, and potentially leading operators down an incorrect response path. Other challenges related to PBPs are the management of multiple procedures, place-keeping, finding the correct procedure for the task at hand, and relying on other sources of additional information to ensure a functional and accurate understanding of the current plant status (Converse, 1995; Fink, Killian, Hanes, & Naser, 2009; Le Blanc & Oxstrand, 2012). The main focus of this report is to describe the research activities conducted to address the remaining two objectives; Develop a prototype CBP system based on requirements identified and Evaluate the CBP prototype. The emphasis will be on the evaluation of an initial CBP prototype in at a Nuclear Power Plant.

  18. Use of Computational Intelligence in Illumination Systems Searching Energetic Efficiency 

    E-Print Network [OSTI]

    Silva, I.; Tostes, M. E.; Silva, R.

    2007-01-01

    . Figure 4: Software main interface. BIBLIOGRAPHIC REFERENCES Hopkinson, R. G., e outros (1966). Daylighting. London: Heinemann, 606 p. Programa Nacional de combate ao desperdício de energia elétrica (PROCEL). Manual de conservação de energia... elétrica em prédios públicos e comerciais. 3. ed. 1993. 20 p. Haddad, J. Conservação de Energia: Eficiência Energética de Instalações e Equipamentos, Universidade Federal de Itajubá, Editora da Efei, 3ª Edição 2006. Brasil. Decreto n° 3.818, de 15 de...

  19. Python for Education: Computational Methods for Nonlinear Systems

    E-Print Network [OSTI]

    Christopher R. Myers; James. P. Sethna

    2007-04-24

    We describe a novel, interdisciplinary, computational methods course that uses Python and associated numerical and visualization libraries to enable students to implement simulations for a number of different course modules. Problems in complex networks, biomechanics, pattern formation, and gene regulation are highlighted to illustrate the breadth and flexibility of Python-powered computational environments.

  20. Power-aware Computing Systems Dagstuhl Seminar 05141

    E-Print Network [OSTI]

    with the same title, held from April 3rd to April 8th 2005 at Schloss Dagstuhl, Germany. 1 Introduction Rapidly increasing chip densities and processor speeds have made energy dis- sipation a leading concern in computer design. The problem raised by energy consumption is especially severe for a whole class of computing

  1. Computer-aided engineering system for design of sequence arrays and lithographic masks

    DOE Patents [OSTI]

    Hubbell, E.A.; Morris, M.S.; Winkler, J.L.

    1999-01-05

    An improved set of computer tools for forming arrays is disclosed. According to one aspect of the invention, a computer system is used to select probes and design the layout of an array of DNA or other polymers with certain beneficial characteristics. According to another aspect of the invention, a computer system uses chip design files to design and/or generate lithographic masks. 14 figs.

  2. Computer-aided engineering system for design of sequence arrays and lithographic masks

    DOE Patents [OSTI]

    Hubbell, E.A.; Morris, M.S.; Winkler, J.L.

    1996-11-05

    An improved set of computer tools for forming arrays is disclosed. According to one aspect of the invention, a computer system is used to select probes and design the layout of an array of DNA or other polymers with certain beneficial characteristics. According to another aspect of the invention, a computer system uses chip design files to design and/or generate lithographic masks. 14 figs.

  3. Computer-aided engineering system for design of sequence arrays and lithographic masks

    DOE Patents [OSTI]

    Hubbell, Earl A. (Mt. View, CA); Morris, MacDonald S. (San Jose, CA); Winkler, James L. (Palo Alto, CA)

    1996-01-01

    An improved set of computer tools for forming arrays. According to one aspect of the invention, a computer system (100) is used to select probes and design the layout of an array of DNA or other polymers with certain beneficial characteristics. According to another aspect of the invention, a computer system uses chip design files (104) to design and/or generate lithographic masks (110).

  4. Computer-aided engineering system for design of sequence arrays and lithographic masks

    DOE Patents [OSTI]

    Hubbell, Earl A. (Mt. View, CA); Morris, MacDonald S. (San Jose, CA); Winkler, James L. (Palo Alto, CA)

    1999-01-05

    An improved set of computer tools for forming arrays. According to one aspect of the invention, a computer system (100) is used to select probes and design the layout of an array of DNA or other polymers with certain beneficial characteristics. According to another aspect of the invention, a computer system uses chip design files (104) to design and/or generate lithographic masks (110).

  5. October 17, 2006 Towards High Availability for High-Performance Computing System Services

    E-Print Network [OSTI]

    Engelmann, Christian

    October 17, 2006 Towards High Availability for High-Performance Computing System Services: Accomplishments and Limitations 1/29 Towards High Availability for High- Performance Computing System Services Louisiana Tech University, Ruston, USA 4 Tennessee Tech University, Cookeville, USA #12;October 17, 2006

  6. Optimizing Performance and Reliability in Distributed Computing Systems Through Wide Spectrum Storage

    E-Print Network [OSTI]

    Dongarra, Jack

    of Energy un- der grant DE-FC02-01ER25465. file system. Logistical Networking, the core of our proposalOptimizing Performance and Reliability in Distributed Computing Systems Through Wide Spectrum. 1 Introduction Over the past two decades the exponential growth in available computing resources has

  7. Sustainable Computing: Informatics and Systems 5 (2015) 1430 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    2015-01-01

    , Morgan Stanley, a global financial services firm based in New York, was physically unable to draw maximizing dynamic resource management in an oversubscribed energy-constrained heterogeneous computing system form 28 June 2014 Accepted 5 August 2014 Keywords: High performance computing system Energy

  8. Thermal, Power, and Co-location Aware Resource Allocation in Heterogeneous High Performance Computing Systems

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    --The rapid increase in power consumption of high performance computing (HPC) systems has led to an increase interference I. INTRODUCTION The power consumption of high-performance comput- ing (HPC) systems and dataThermal, Power, and Co-location Aware Resource Allocation in Heterogeneous High Performance

  9. Portfolio Theory-Based Resource Assignment in a Cloud Computing System

    E-Print Network [OSTI]

    Pedram, Massoud

    management in cloud computing systems. Considering that much of the time, server machines in a data center of the means and standard deviations of these random variables. Inspired by the modern portfolio theory computing systems, which are typically housed in facilities called data centers, are composed of a large

  10. A general method for the computation of probabilities in systems of first order chemical reactions

    E-Print Network [OSTI]

    Djuriæ, Petar M.

    A general method for the computation of probabilities in systems of first order chemical reactions for the computation of molecular population distributions in a system of first-order chemical reactions. The method to model the chemical reactions in a stochastic way rather than with the traditional differential equations

  11. Book Review of Computer Control Systems. Analysis and Design with ProcessOriented

    E-Print Network [OSTI]

    Ghulchak, Andrey

    Book Review of Computer Control Systems. Analysis and Design with Process­Oriented Models by E­time process by a digital computer, declares a high need for analysis of such hybrid systems. Two rather straightforward ideas of either a continuous­time design, followed by a discretization of the controller

  12. March 14, 2007 Towards High Availability for High-Performance Computing System Services

    E-Print Network [OSTI]

    Engelmann, Christian

    March 14, 2007 Towards High Availability for High-Performance Computing System Services: Accomplishments and Limitations 1/42 Towards High Availability for High- Performance Computing System Services The University of Reading, Reading, UK #12;March 14, 2007 Towards High Availability for High

  13. High Performance Computing Update, June 2009 1. A meeting was held with users and potential users of high performance computing systems in April and this

    E-Print Network [OSTI]

    Sussex, University of

    High Performance Computing Update, June 2009 1. A meeting was held with users and potential users of high performance computing systems in April and this considered a proposal from the Director and application "advice" and a core system to host and manage high performance computing nodes (or clusters

  14. To appear in Int'l Conference on Computer Design: VLSI in Computers and Processors, 1993 Efficient Verification of Symmetric Concurrent Systems \\Lambda

    E-Print Network [OSTI]

    Dill, David L.

    To appear in Int'l Conference on Computer Design: VLSI in Computers and Processors, 1993 Efficient Verification of Symmetric Concurrent Systems \\Lambda C. Norris Ip David L. Dill Department of Computer Science in automatic verification of concur­ rent systems. This paper describes the results of test­ ing the technique

  15. A personal color proofing system for computer generated images

    E-Print Network [OSTI]

    Rosenzweig, Elizabeth

    1985-01-01

    Just as the invention of photography challenged the world's visual literacy at the turn of the century, so has computer graphics begun to reshape visual communication. Although still in its infancy, recently developed tools ...

  16. Optimization techniques for human computation-enabled data processing systems

    E-Print Network [OSTI]

    Marcus, Adam, Ph. D. Massachusetts Institute of Technology

    2012-01-01

    Crowdsourced labor markets make it possible to recruit large numbers of people to complete small tasks that are difficult to automate on computers. These marketplaces are increasingly widely used, with projections of over ...

  17. The Need for Biological Computation System Models | GE Global...

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

    2012.10.09 Hello everyone, I'm Maria Zavodszky and I work in the Computational Biology and Biostatistics Lab at GE Global Research in Niskayuna, New York. This being our...

  18. Application workload prediction and placement in cloud computing systems

    E-Print Network [OSTI]

    LaCurts, Katrina L. (Katrina Leigh)

    2014-01-01

    Cloud computing has become popular in recent years. Companies such as Amazon and Microsoft host large datacenters of networked machines available for users to rent. These users are varied: from individual researchers to ...

  19. Graduate Research Opportunities in SIGNALS, SYSTEMS & COMPUTATIONAL INTELLIGENCE

    E-Print Network [OSTI]

    Rusu, Adrian

    Communications · Computer Networks · Bioinformatics · Biomedical Signal Processing & Modeling · Image Processing in relevant areas (signal processing, probability and statistics, linear algebra, programming, bioinformatics background courses. Electives offered include: · Advanced Digital Signal Processing · Wavelets Transforms

  20. Investigating Operating System Noise in Extreme-Scale High-Performance Computing Systems using Simulation

    SciTech Connect (OSTI)

    Engelmann, Christian

    2013-01-01

    Hardware/software co-design for future-generation high-performance computing (HPC) systems aims at closing the gap between the peak capabilities of the hardware and the performance realized by applications (application-architecture performance gap). Performance profiling of architectures and applications is a crucial part of this iterative process. The work in this paper focuses on operating system (OS) noise as an additional factor to be considered for co-design. It represents the first step in including OS noise in HPC hardware/software co-design by adding a noise injection feature to an existing simulation-based co-design toolkit. It reuses an existing abstraction for OS noise with frequency (periodic recurrence) and period (duration of each occurrence) to enhance the processor model of the Extreme-scale Simulator (xSim) with synchronized and random OS noise simulation. The results demonstrate this capability by evaluating the impact of OS noise on MPI_Bcast() and MPI_Reduce() in a simulated future-generation HPC system with 2,097,152 compute nodes.

  1. Federal Register

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12, 2015Executive Order14, 20111,FYDepartmentBillionFederalDepartment2

  2. A Novel System for Rapidly Identifying Toxic Chemicals During Emergencies UROP Student: Arunkumaar Ganesan (Electrical Engineering and Computer Science)

    E-Print Network [OSTI]

    Bhavnani, Suresh K.

    A Novel System for Rapidly Identifying Toxic Chemicals During Emergencies UROP Student: Arunkumaar Ganesan (Electrical Engineering and Computer Science) Faculty Mentor: Suresh K. Bhavnani (Center for Computational Medicine and Biology) Co-authors: Clayton Scott (Electrical Engineering and Computer Science

  3. Computationally Efficient Clustering of Power Supplies in Heterogeneous Real Time Systems

    E-Print Network [OSTI]

    Friedman, Eby G.

    functionally diverse systems with multiple power domains. To provide a high quality power delivery system an integrated part of the power management system. To maintain a high quality power supply despite increasingComputationally Efficient Clustering of Power Supplies in Heterogeneous Real Time Systems Inna

  4. Postdoc position: Hybrid Systems Theorem Proving Carnegie Mellon University, Computer Science Department

    E-Print Network [OSTI]

    Sandholm, Tuomas W.

    Postdoc position: Hybrid Systems Theorem Proving Carnegie Mellon University, Computer Science is to develop next-generation verification techniques for cyber- physical systems and hybrid systems. Our prover KeYmaera and have found application in the verification of cars, aircraft, railway systems

  5. EDA221 Introduction to Computer Graphics, 2013 Assignment 1 Solar System

    E-Print Network [OSTI]

    EDA221 ­ Introduction to Computer Graphics, 2013 Assignment 1 ­ Solar System In this assignment you-definition. This will instruct the precompiler to use solar system.cpp as the main program. Before com- piling however, some code needs to be written. Solar System Create your own model of the solar system

  6. A General Self-adaptive Task Scheduling System for Non-dedicated Heterogeneous Computing

    E-Print Network [OSTI]

    Sun, Xian-He

    1 A General Self-adaptive Task Scheduling System for Non-dedicated Heterogeneous Computing Ming Wu outperforms current systems in scheduling large applications in a non- dedicated heterogeneous environment. 1 are for dedicated systems. By dedicated, we refer resources in the system serve the application in a dedicated

  7. 6.824 Distributed Computer Systems, Fall 2002

    E-Print Network [OSTI]

    Morris, Robert Tappan

    Abstractions and implementation techniques for design of distributed systems; server design, network programming, naming, storage systems, security, and fault tolerance. Readings from current literature. 6 Engineering ...

  8. Emergence and Computation at the Edge of Classical and Quantum Systems

    E-Print Network [OSTI]

    Ignazio Licata

    2007-11-19

    The problem of emergence in physical theories makes necessary to build a general theory of the relationships between the observed system and the observing system. It can be shown that there exists a correspondence between classical systems and computational dynamics according to the Shannon-Turing model. A classical system is an informational closed system with respect to the observer; this characterizes the emergent processes in classical physics as phenomenological emergence. In quantum systems, the analysis based on the computation theory fails. It is here shown that a quantum system is an informational open system with respect to the observer and able to exhibit processes of observational, radical emergence. Finally, we take into consideration the role of computation in describing the physical world.

  9. Computer System, Cluster and Networking Summer Institute (CSCNSI)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefault Changes TheCompute NodesScience andComputer

  10. Asynchronous broadcast for ordered delivery between compute nodes in a parallel computing system where packet header space is limited

    DOE Patents [OSTI]

    Kumar, Sameer

    2010-06-15

    Disclosed is a mechanism on receiving processors in a parallel computing system for providing order to data packets received from a broadcast call and to distinguish data packets received at nodes from several incoming asynchronous broadcast messages where header space is limited. In the present invention, processors at lower leafs of a tree do not need to obtain a broadcast message by directly accessing the data in a root processor's buffer. Instead, each subsequent intermediate node's rank id information is squeezed into the software header of packet headers. In turn, the entire broadcast message is not transferred from the root processor to each processor in a communicator but instead is replicated on several intermediate nodes which then replicated the message to nodes in lower leafs. Hence, the intermediate compute nodes become "virtual root compute nodes" for the purpose of replicating the broadcast message to lower levels of a tree.

  11. Computational e-Science Studying complex systems in silico

    E-Print Network [OSTI]

    Bisseling, Rob

    .A. Van der Vorst, A. van Kampen, H. Bal, P. Klint, R.M.M. Mattheij, J. van Wijk, J. Schaye, H Research Issues Resources required Metrics of Success From particle to population: scientific computing in a distributed data environment Impact on science and society: discrete problems Impact on science and society

  12. ELECTRICAL, COMPUTER, AND SYSTEMS ENGINEERING DEPARTMENT ABET COURSE SYLLABUS

    E-Print Network [OSTI]

    Zhang, Tong

    electric circuits, and measurements of their properties. Topics include resistive and energy-storage and analysis, frequency response, and Laplace transform and computer-aided methods. Pre-Requisite Courses: MATH of their properties. Topics include resistive and energy-storage elements, controlled sources and operational

  13. school of computing, informatics, and decision systems engineering

    E-Print Network [OSTI]

    with a growing focus on health informatics, urban services and global logistics is also attracting new students combined strengths in computing, modeling and decision making; new levels of energy and activity to an investment from the university, we were able to acquire 9,000 square feet of space in our building

  14. Modeling Living Systems for Computer Vision Demetri Terzopoulos

    E-Print Network [OSTI]

    Terzopoulos, Demetri

    , for computer vision. First, I present a new breed of artificial animals in a physics­based virtual marine world vision. 1 These advances center around the idea of artificial animals, or ``animats'' a term coined and 3 present our work on artificial fishes and animat vision. The basic idea in a nutshell

  15. GRworkbench: A Computational System Based on Differential Geometry

    E-Print Network [OSTI]

    Susan M Scott; Benjamin J K Evans; Antony C Searle

    2001-11-19

    We have developed a new tool for numerical work in General Relativity: GRworkbench. While past tools have been ad hoc, GRworkbench closely follows the framework of Differential Geometry to provide a robust and general way of computing on analytically defined space-times. We discuss the relationship between Differential Geometry and C++ classes in GRworkbench, and demonstrate their utility.

  16. federal budget

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4)9 Federal RegisterStorm1 3446 YEAR/%2A en2/%2A4/%2A

  17. Federal Register

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) AugustA. GeographicYucca faultEGGUSE CODE2479 Federal

  18. Federal Register

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) AugustA. GeographicYucca faultEGGUSE54 Federal

  19. A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA FOR OPERATION AND ASSESSMENT

    E-Print Network [OSTI]

    A.24-1 A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA) computational support of Earth system modeling. #12;A.24-2 2.1 Acceleration of Operational Use of Research Data

  20. Center for Computational Analysis of Social and Organizational Systems

    E-Print Network [OSTI]

    Tews System Alert - verbal Raspberry PieGeneral Twitter Population PiTT Sees CASOS Web Leader Cell Phone

  1. Weather network computer to control deck-heating system

    SciTech Connect (OSTI)

    Roe, A.

    1997-04-07

    A ground-source heating system for bridge deicing is briefly described in this article. The deck heating system will be controlled by the Oklahoma state weather network. Warm ground air will be pumped from more than 100 boreholes at least 200 feet deep. The heat transfer fluid, possibly propylene glycol, will be circulated through a sealed tube system in the bridge deck. Costs are estimated at $200,000 for the heating system and $840,000 for the total redecking project.

  2. Surveillance Analysis Computer System (SACS) software design document (SDD)

    SciTech Connect (OSTI)

    Glasscock, J.A.

    1995-09-01

    This document contains the Software Design Description for Phase II of the SACS project, and Impact Level 3Q system

  3. A Performance Instrumentation Framework to Characterize Computation-Communication Overlap in Message-Passing Systems

    E-Print Network [OSTI]

    Shet, Aniruddha G.

    A Performance Instrumentation Framework to Characterize Computation-Communication Overlap for applications on high-end computers. In this paper, we propose an instrumentation framework for message. The ap- proach has been used to instrument two MPI implementa- tions as well as the ARMCI system

  4. Energy-Efficient Virtual Machine Replication and Placement in a Cloud Computing System

    E-Print Network [OSTI]

    Pedram, Massoud

    Energy-Efficient Virtual Machine Replication and Placement in a Cloud Computing System Hadi the servers more efficiently. In this paper, the problem of energy-efficient VM placement in a cloud computing in a datacenter, a cloud provider can reduce the total energy consumption for servicing his clients with little

  5. Network: Computation in Neural Systems March 2007; 18(1): 13

    E-Print Network [OSTI]

    Shadmehr, Reza

    system is to be understood, and which particular information-processing problem is in focus. David Marr's (Marr 1982) seminal work on computational neuroscience for vision made the useful distinction between-level computational neuroscience that addresses the topic of sensory-motor control on all three of Marr's levels, i

  6. COMPUTING AND DEFLATING EIGENVALUES WHILE SOLVING MULTIPLE RIGHT HAND SIDE LINEAR SYSTEMS WITH AN

    E-Print Network [OSTI]

    Stathopoulos, Andreas

    COMPUTING AND DEFLATING EIGENVALUES WHILE SOLVING MULTIPLE RIGHT HAND SIDE LINEAR SYSTEMS a new algorithm that computes eigenvalues and eigenvectors of a Her- mitian positive definite matrix applications, where hundreds of right hand sides may be needed. Specifically, about 70 eigenvectors

  7. Fast Jacobi-type Algorithm for Computing Distances Between Linear Dynamical Systems

    E-Print Network [OSTI]

    Vidal, René

    Fast Jacobi-type Algorithm for Computing Distances Between Linear Dynamical Systems Nicolas D Jacobi-type algorithm that solves this problem. Each step of the algorithm is equivalent to finding, in this paper, we introduce a fast and accurate Jacobi-type algorithm for computing alignment distances. Our

  8. A distributed, graphical user interface based, computer control system for atomic physics experiments

    E-Print Network [OSTI]

    factor for jacket structures for offshore wind turbines in Rhode Island J. Renewable Sustainable Energy 4A distributed, graphical user interface based, computer control system for atomic physics OF SCIENTIFIC INSTRUMENTS 84, 015105 (2013) A distributed, graphical user interface based, computer control

  9. Symmetric Active/Active High Availability for High-Performance Computing System Services

    E-Print Network [OSTI]

    He, Xubin "Ben"

    Symmetric Active/Active High Availability for High-Performance Computing System Services Christian to pave the way for high avail- ability in high-performance computing (HPC) by focusing on efficient symmetric active/active high availability for multiple redundant head and service nodes running in virtual

  10. MpPVM : A Software System Non-Dedicated Heterogeneous Computing

    E-Print Network [OSTI]

    Sun, Xian-He

    MpPVM : A Software System for Non-Dedicated Heterogeneous Computing Kasidit Chanchio Xian-He Sun migration for PVM application programs in a non-dedicated heterogeneous computing environ- ment. New and promising performance of our process migration mechanism in the scalable non- dedicated heterogeneous

  11. School of Computing, Informatics and Decision System Engineering

    E-Print Network [OSTI]

    Fainekos, Georgios E.

    remain constant, then the system should not change from gear 1 to gear 2 and then back to gear 1" · "whenever the system enters the first gear, then it should not enter the second gear within 2.5 sec" · "whenever the system is in transition from gear 2 to gear 1, then the derivative of the torque is less than

  12. Guest Editorial Safety, reliability and security of industrial computer systems

    E-Print Network [OSTI]

    Felici, Massimo

    different stakeholders who drive the system life cycle as well as the dependability system requirements to certification, deployment, evaluation, evolution, and decommission in the system life cycle. There are two be tempted to looking for a universal model that may be used throughout the entire life cycle. A universal

  13. April 30, 2013 Mathematical and Computer Modelling of Dynamical Systems criticalTransitions Mathematical and Computer Modelling of Dynamical Systems

    E-Print Network [OSTI]

    Gedeon, Tomas

    , from those appearing in physiology and ecology to Earth systems modeling, often experience critical

  14. Computer aided analysis and synthesis for discrete robust control systems 

    E-Print Network [OSTI]

    Setijawan, Bambang

    1994-01-01

    of an interval discrete system. . 4 Nyquist plot of the system with a constant controller k = -3. . . . . 5 Definition of encirclement. . Page 27 28 30 6 Definition of enclosed points and regions. . 7 Definition of the number of encirclement and enclosure... unstable 1 Re marginally stable Fig. 1. Stability region for discrete time systems A general control system is presented in the following figure, r e + controller C(z) PLANT G(z) Fig. 2. A general form of control systems Any physical process...

  15. Entanglement in systems of oscillators and quantum computations

    E-Print Network [OSTI]

    Yuri I. Ozhigov

    2012-09-03

    It is shown that quantum devices based only on oscillators cannot serve as the universal quantum computer, despite of entanglement in such devices, which we roughly estimate for the ideal case and for the harmful entanglement with photonic modes. We show that quasi-particles are the native shell for the entanglement already for ground state, in contast to the free electromagnetic field where vacuum state does not produce entanglement at all.

  16. Computing

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the following commentsMethodsCompositional6Energy Computers,Computing and

  17. Computing

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the following commentsMethodsCompositional6Energy Computers,Computing

  18. Computing

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefault Changes TheComputeComputing

  19. A computational strategy for multiscale systems with applications to Lorenz 96 model

    E-Print Network [OSTI]

    Van Den Eijnden, Eric

    A computational strategy for multiscale systems with applications to Lorenz 96 model Ibrahim 2004 Available online Abstract Numerical schemes for systems with multiple spatio-temporal scales are investigated. The multiscale schemes use asymptotic results for this type of systems which guarantee

  20. BRICSLS-97-1Chomicki&Toman:TemporalLogicinInformationSystems BRICSBasic Research in Computer Science

    E-Print Network [OSTI]

    Toman, David

    BRICSLS-97-1Chomicki&Toman:TemporalLogicinInformationSystems BRICSBasic Research in Computer Science Temporal Logic in Information Systems Jan Chomicki David Toman BRICS Lecture Series LS-97-1 ISSN/1/ #12;Temporal Logic in Information Systems Jan Chomicki David Toman #12;#12;Jan Chomicki Dept

  1. AN ARCHITECTURAL PATTERN FOR COMPUTER-MEDIATED COMMUNICATION IN GROUPWARE SYSTEMS

    E-Print Network [OSTI]

    Guerrero, Luis

    815 AN ARCHITECTURAL PATTERN FOR COMPUTER- MEDIATED COMMUNICATION IN GROUPWARE SYSTEMS Luis A Communication, Architectural Pattern, CSCW. Abstract: In the creation of groupware systems, a good design of the communication mechanisms required by the groupware systems, bearing in mind the other application's design

  2. Published in Future Generation Computer Systems (15), 623 (1999), Technical Note DHPC-042.

    E-Print Network [OSTI]

    Hawick, Ken

    1999-01-01

    describe our DISCWorld system for wide-area, high-performance metacomputing in which we adopt a high: metacomputing; high-performance computing; wide-area networks; applications services. 1 Introduction Distributed Information Systems Control World (DISCWorld) system for wide-area, service-based, high-performance

  3. Introduction to Information Systems Hardware basics, computer networks and architectures, proto-

    E-Print Network [OSTI]

    Kallenrode, May-Britt

    Teaching Introduction to Information Systems Hardware basics, computer networks and architectures on a use case from the information systems practice by making use of already acquired methods and concepts and documentation. Contact Prof. Dr. Frank Teuteberg c/o Univserity of Osnabrueck Accounting and Information Systems

  4. School of Mechanical Engineering and Computer Science Mech 348: Dynamic Systems and Control

    E-Print Network [OSTI]

    , including mechanical, electrical, fluid, and thermal systems. Fundamentals of vibration analysis, controlSchool of Mechanical Engineering and Computer Science Mech 348: Dynamic Systems and Control Catalog mechanical, electrical, thermal and fluid engineering systems 3. To introduce students to the analysis

  5. Evaluation of Adaptive Computing Concepts for Classical ERP Systems and Enterprise Services

    E-Print Network [OSTI]

    Kemper, Alfons

    Evaluation of Adaptive Computing Concepts for Classical ERP Systems and Enterprise Services Martin Resource Planning Systems (ERP), a peak-load oriented hardware sizing is often used. Better utilization can Univer- sit¨at M¨unchen provides support for 55 ERP training systems. The evaluation of the historical

  6. Study on the use of VLSI ASIC technology for generic power system computer relay architectures 

    E-Print Network [OSTI]

    Faulkner, Kenneth Ray

    1994-01-01

    This thesis discusses the feasibility of improving power system computer relay devices using Very Large Scale Integration technology. It outlines the functionality that is required of this equipment A high-level design that attempts to use dedicated...

  7. Newtonian systems, bounded in space, time, mass and energy can compute all functions1

    E-Print Network [OSTI]

    Martin, Ralph R.

    Newtonian systems, bounded in space, time, mass and energy can compute all functions1 E.J. Beggs2, University of Wales Swansea, February 2005. 2 Department of Mathematics. Email: e.j.beggs@swansea.ac.uk 3

  8. Software defect tracking during new product development of a computer system

    E-Print Network [OSTI]

    Curhan, Lisa A., 1961-

    2005-01-01

    Software defects (colloquially known as "bugs") have a major impact on the market acceptance and profitability of computer systems. Sun Microsystems markets both hardware and software for a wide variety of customer needs. ...

  9. Computer systems for photo-identification and theodolite tracking of cetaceans 

    E-Print Network [OSTI]

    Gailey, Glenn Andrew

    2001-01-01

    Two separate computer-based systems were evaluated for two different methodological techniques (photo-identification and theodolite tracking) of cetacean research. The photo-identification program, Finscan, was evaluated ...

  10. Computer-Aided Dispatch System as a Decision Making Tool in Public and Private Sectors

    E-Print Network [OSTI]

    Lee, I-Jen

    We describe in detail seven distinct areas in both public and private sectors in which a real-time computer-aided dispatch system is applicable to the allocation of scarce resources. Characteristics of a real-time ...

  11. Cognitive Engineering in the Design of Human-Computer Interaction and Expert Systems, edited by G. Salvendy

    E-Print Network [OSTI]

    Fischer, Gerhard

    Cognitive Engineering in the Design of Human-Computer Interaction and Expert Systems, edited by G is to achieve these two goals simultaneously. We claim that useful computers have to be complex systems a variety of computer-based intelligent support systems which take advantage of the interactive and dynamic

  12. Where Theory meets Practice: A Case for an Activity Theory based Methodology to guide Computer System Design

    E-Print Network [OSTI]

    for an Activity Theory based Methodology to guide Computer System Design Daisy Mwanza Knowledge Media Institute, The Open University, Milton Keynes, MK7 6AA, United Kingdom D.Mwanza@open.ac.uk Abstract: Computer system a computer system. Activity Theory (AT) has emerged as a suitable framework for analysing social and cultural

  13. GUCHA: An Internet-based Parallel Computing System L. F. Lau, A. L. Ananda, G. Tan, W. F. Wong

    E-Print Network [OSTI]

    Wong, Weng Fai

    1 GUCHA: An Internet-based Parallel Computing System Using Java L. F. Lau, A. L. Ananda, G. Tan, W computational resource available in the Internet for parallel processing. In this paper, existing systems and goals of an effective parallel computing system in the Internet environment are singled out. These serve

  14. On the Computation of an Upper Bound on the Gap Metric for a Class of Nonlinear Systems

    E-Print Network [OSTI]

    Marquez, Horacio J.

    1 On the Computation of an Upper Bound on the Gap Metric for a Class of Nonlinear Systems Vahid method and a previous method that is based on the direct computation. Index Terms-- Nonlinear systems in the gap metric. The computation of the gap metric for LTI system was developed by T. T. Georgiou [4

  15. Journal of Computer and System Sciences 78 (2012) 11271141 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    Ray, Asok

    2012-01-01

    Journal of Computer and System Sciences 78 (2012) 1127­1141 Contents lists available at SciVerse ScienceDirect Journal of Computer and System Sciences www.elsevier.com/locate/jcss Vector space rights reserved. doi:10.1016/j.jcss.2012.02.001 #12;1128 Y. Wen, A. Ray / Journal of Computer and System

  16. May 28, 2007 Middleware in Modern High Performance Computing System Architectures 1/20 Middleware in Modern High Performance

    E-Print Network [OSTI]

    Engelmann, Christian

    May 28, 2007 Middleware in Modern High Performance Computing System Architectures 1/20 Middleware in Modern High Performance Computing System Architectures Christian Engelmann1,2, Hong Ong1, Stephen L 28, 2007 Middleware in Modern High Performance Computing System Architectures 2/20 Talk Outline

  17. Reverse Computation for Rollback-based Fault Tolerance in Large Parallel Systems

    SciTech Connect (OSTI)

    Perumalla, Kalyan S [ORNL; Park, Alfred J [ORNL

    2013-01-01

    Reverse computation is presented here as an important future direction in addressing the challenge of fault tolerant execution on very large cluster platforms for parallel computing. As the scale of parallel jobs increases, traditional checkpointing approaches suffer scalability problems ranging from computational slowdowns to high congestion at the persistent stores for checkpoints. Reverse computation can overcome such problems and is also better suited for parallel computing on newer architectures with smaller, cheaper or energy-efficient memories and file systems. Initial evidence for the feasibility of reverse computation in large systems is presented with detailed performance data from a particle simulation scaling to 65,536 processor cores and 950 accelerators (GPUs). Reverse computation is observed to deliver very large gains relative to checkpointing schemes when nodes rely on their host processors/memory to tolerate faults at their accelerators. A comparison between reverse computation and checkpointing with measurements such as cache miss ratios, TLB misses and memory usage indicates that reverse computation is hard to ignore as a future alternative to be pursued in emerging architectures.

  18. System for computer controlled shifting of an automatic transmission

    DOE Patents [OSTI]

    Patil, Prabhakar B. (Detroit, MI)

    1989-01-01

    In an automotive vehicle having an automatic transmission that driveably connects a power source to the driving wheels, a method to control the application of hydraulic pressure to a clutch, whose engagement produces an upshift and whose disengagement produces a downshift, the speed of the power source, and the output torque of the transmission. The transmission output shaft torque and the power source speed are the controlled variables. The commanded power source torque and commanded hydraulic pressure supplied to the clutch are the control variables. A mathematical model is formulated that describes the kinematics and dynamics of the powertrain before, during and after a gear shift. The model represents the operating characteristics of each component and the structural arrangement of the components within the transmission being controlled. Next, a close loop feedback control is developed to determine the proper control law or compensation strategy to achieve an acceptably smooth gear ratio change, one in which the output torque disturbance is kept to a minimum and the duration of the shift is minimized. Then a computer algorithm simulating the shift dynamics employing the mathematical model is used to study the effects of changes in the values of the parameters established from a closed loop control of the clutch hydraulic and the power source torque on the shift quality. This computer simulation is used also to establish possible shift control strategies. The shift strategies determine from the prior step are reduced to an algorithm executed by a computer to control the operation of the power source and the transmission.

  19. A Dialogue Concerning Two World Systems: Info-Computational vs. Mechanistic

    E-Print Network [OSTI]

    Gordana Dodig-Crnkovic; Vincent C. Mueller

    2009-10-26

    The dialogue develops arguments for and against adopting a new world system, info-computationalist naturalism, that is poised to replace the traditional mechanistic world system. We try to figure out what the info-computational paradigm would mean, in particular its pancomputationalism. We make some steps towards developing the notion of computing that is necessary here, especially in relation to traditional notions. We investigate whether pancomputationalism can possibly provide the basic causal structure to the world, whether the overall research programme appears productive and whether it can revigorate computationalism in the philosophy of mind.

  20. Computer System, Cluster, and Networking Summer Institute Program Description

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefault Changes TheCompute NodesScience

  1. Computer System, Cluster, and Networking Summer Institute Projects

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibilitydefault Changes TheCompute NodesSciencePrograms »

  2. Computational Systems & Software Environment | National Nuclear Security

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the t-) S/,,5 'a C |Administration Computational

  3. Preparing ground states of quantum many-body systems on a quantum computer

    E-Print Network [OSTI]

    David Poulin; Pawel Wocjan

    2008-09-16

    Preparing the ground state of a system of interacting classical particles is an NP-hard problem. Thus, there is in general no better algorithm to solve this problem than exhaustively going through all N configurations of the system to determine the one with lowest energy, requiring a running time proportional to N. A quantum computer, if it could be built, could solve this problem in time sqrt(N). Here, we present a powerful extension of this result to the case of interacting quantum particles, demonstrating that a quantum computer can prepare the ground state of a quantum system as efficiently as it does for classical systems.

  4. Super computers in astrophysics and High Performance simulations of self-gravitating systems

    E-Print Network [OSTI]

    R. Capuzzo-Dolcetta; P. Di Matteo; P. Miocchi

    2003-07-16

    The modern study of the dynamics of stellar systems requires the use of high-performance computers. Indeed, an accurate modelization of the structure and evolution of self-gravitating systems like planetary systems, open clusters, globular clusters and galaxies imply the evaluation of body-body interaction over the whole size of the structure, a task that is computationally very expensive, in particular when it is performed over long intervals of time. In this report we give a concise overview of the main problems of stellar systems simulations and present some exciting results we obtained about the interaction of globular clusters with the parent galaxy.

  5. Mathematical modeling and computer simulation of processes in energy systems

    SciTech Connect (OSTI)

    Hanjalic, K.C. )

    1990-01-01

    This book is divided into the following chapters. Modeling techniques and tools (fundamental concepts of modeling); 2. Fluid flow, heat and mass transfer, chemical reactions, and combustion; 3. Processes in energy equipment and plant components (boilers, steam and gas turbines, IC engines, heat exchangers, pumps and compressors, nuclear reactors, steam generators and separators, energy transport equipment, energy convertors, etc.); 4. New thermal energy conversion technologies (MHD, coal gasification and liquefaction fluidized-bed combustion, pulse-combustors, multistage combustion, etc.); 5. Combined cycles and plants, cogeneration; 6. Dynamics of energy systems and their components; 7. Integrated approach to energy systems modeling, and 8. Application of modeling in energy expert systems.

  6. Computer

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the following commentsMethodsCompositional6 Computational CSEEnergy

  7. Master of Computer Science Master of Computer Science

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    ­ Dependable systems ­ High performance computing 5 Computational Linguistics ­ Computational and formal

  8. BE568: Computational Systems Biology of Human SPRING 2014

    E-Print Network [OSTI]

    Vajda, Sandor

    , proteomic analysis, next-generation sequencing, machine learning, #12;elementary genetics relevant to disease mechanisms, systems biology of disease, diagnosis, prognosis, personalized medicine or network based drug design. The course also aims to teach

  9. Assessing computational methods and science policy in systems biology

    E-Print Network [OSTI]

    Castillo, Andrea R. (Andrea Redwing)

    2009-01-01

    In this thesis, I discuss the development of systems biology and issues in the progression of this science discipline. Traditional molecular biology has been driven by reductionism with the belief that breaking down a ...

  10. Computational Human Performance Modeling For Alarm System Design

    SciTech Connect (OSTI)

    Jacques Hugo

    2012-07-01

    The introduction of new technologies like adaptive automation systems and advanced alarms processing and presentation techniques in nuclear power plants is already having an impact on the safety and effectiveness of plant operations and also the role of the control room operator. This impact is expected to escalate dramatically as more and more nuclear power utilities embark on upgrade projects in order to extend the lifetime of their plants. One of the most visible impacts in control rooms will be the need to replace aging alarm systems. Because most of these alarm systems use obsolete technologies, the methods, techniques and tools that were used to design the previous generation of alarm system designs are no longer effective and need to be updated. The same applies to the need to analyze and redefine operators’ alarm handling tasks. In the past, methods for analyzing human tasks and workload have relied on crude, paper-based methods that often lacked traceability. New approaches are needed to allow analysts to model and represent the new concepts of alarm operation and human-system interaction. State-of-the-art task simulation tools are now available that offer a cost-effective and efficient method for examining the effect of operator performance in different conditions and operational scenarios. A discrete event simulation system was used by human factors researchers at the Idaho National Laboratory to develop a generic alarm handling model to examine the effect of operator performance with simulated modern alarm system. It allowed analysts to evaluate alarm generation patterns as well as critical task times and human workload predicted by the system.

  11. Computing Statistics for Hamiltonian Systems: A Case Study

    E-Print Network [OSTI]

    Tupper, Paul

    and Statistics, McGill University, Montr´eal QC H3A 2K6, Canada. Abstract We present the results of a set of the systems. We apply four methods: one symplectic method (St¨ormer-Verlet) and three energy-conserving step or systematically remove energy from the system [11,7]. There are two alternatives commonly proposed. One is the use

  12. Safety Analysis and Certification of Open Distributed Systems P. M. Conmy; Department of Computer Science, University of York, York, YO10 5DD U.K.

    E-Print Network [OSTI]

    Nicholson, Mark

    Safety Analysis and Certification of Open Distributed Systems P. M. Conmy; Department of Computer system is a network of computer modules upon which one or more computer applications can run and inter to the safety analysis and certification of avionics computer systems. At present aircraft computing systems are

  13. Southwestern Federal Power System combined financial statements and supplemental schedules (with independent auditors` reports thereon) for the years ended September 30, 1996 and 1995

    SciTech Connect (OSTI)

    NONE

    1997-12-04

    This report presents the results of the independent certified public accountants` audit of the Southwestern Federal Power System`s (SWFPS) combined power system statement of assets, Federal investment and liabilities, and the related combined statements of revenues, expenses and accumulated net revenues, and cash flows. The 1996 financial statement audit was made under the provisions of the Inspector General Act (5 U.S.C. App.), as amended, the Government Management Reform Act (31 U.S.C. 3515), and Office of Management and Budget implementing guidance. The auditors` work was conducted in accordance with generally accepted government auditing standards. To fulfill audit responsibilities, the Office of Inspector General contracted with the independent public accounting firm of KPMG Peak Marwick LLP (KPMG) to conduct the audit for them, subject to their review. The auditors` report on SWFP`s internal control structure disclosed a reportable condition directed to the Southwestern Power Administration concerning a delay in properly classifying the value of plant assets. The report also included two reportable conditions directed to the Army Corps of Engineers regarding the inconsistent calculation of depreciation expense and the misallocation of multipurpose costs. None of these reportable conditions were considered to be material weaknesses. The auditors` report on SWFP`s compliance with laws and regulations disclosed no new instances of noncompliance by Southwestern.

  14. Enhancing the human-computer interface of power system applications

    SciTech Connect (OSTI)

    Azevedo, G.P. de; Souza, C.S. de; Feijo, B.

    1995-12-31

    This paper examines a topic of increasing importance: the interpretation of the massive amount of data available to power system engineers. The solutions currently adopted in the presentation of data in graphical interfaces are discussed. It is demonstrated that the representations of electric diagrams can be considerably enhanced through the adequate exploitation of resources available in full-graphics screens and the use of basic concepts from human-factors research. Enhanced representations of electric diagrams are proposed and tested. The objective is to let the user see the behavior of the system, allowing for better interpretation of program data and results and improving user`s productivity.

  15. Enhancing the human-computer interface of power system applications

    SciTech Connect (OSTI)

    Azevedo, G.P. de; Souza, C.S. de; Feijo, B.

    1996-05-01

    This paper examines a topic of increasing importance: the interpretation of the massive amount of data available to power system engineers. The solutions currently adopted in the presentation of data in graphical interfaces are discussed. It is demonstrated that the representations of electric diagrams can be considerably enhanced through the adequate exploitation of resources available in full-graphics screens and the use of basic concepts from human-factors research. Enhanced representations of electric diagrams are proposed and tested. The objective is to let the user ``see`` the behavior of the system, allowing for better interpretation of program data and results and improving user`s productivity.

  16. CERVANTES -A SYSTEM SUPPORTING TEXT ANALYSIS Computing Research Laboratory

    E-Print Network [OSTI]

    and user interfaces to support government analysts in their information analysis tasks. It is also for government analysts developed during Phase I of Tip- ster. In addition we have developed a large scale docu' Engfish queries into Spanish (see researchpapers) CRL has developed systems for recognizing proper names

  17. HIGH PERFORMANCE INTEGRATION OF DATA PARALLEL FILE SYSTEMS AND COMPUTING

    E-Print Network [OSTI]

    Ph.D. research, he guided me into the research field of distributed systems; his insightful advice of working with him, I learned how to become a professional researcher. I would like to thank my entire for their professional guidance, generous support, and valuable suggestions that were given throughout this research work

  18. The Olivo-Cerebellar System: Dynamical Processes and Computational Principles

    E-Print Network [OSTI]

    . The generation of oscillations in networks of electrically coupled cells In several biological systems, the electrical coupling of non-oscillating cells generates synchronized membrane potential oscillations that the electrical coupling of identical, quiescent elements can generate synchronized oscillations. I show

  19. Enhancements of ANALYZE: A Computer-Assisted Analysis System

    E-Print Network [OSTI]

    Greenberg, Harvey J.

    and infeasibility diagnoses. Categories and Subject Descriptors: G.1.6 [Numerical Analysis]: Optimization and Modeling]: Model Validation and Analysls General Terms: Design, Experimentation, Languages, Performance that define an instance, was developed by Baker [1] and by Welch [22]. Their modeling systems, MIMI [3

  20. Computer Simulation of Chemical and Biomolecular Systems Vol. 482 (1986)

    E-Print Network [OSTI]

    Mezei, Mihaly

    1986-01-01

    functions to the exploration of the structure and energetics of condensed fluid phases such as liquid water internal energy), various spatial distribution functions for equilibrium systems and time correlation and mecha- nism via activated complex theory also require a particular knowledge of the configurational free

  1. Cooperation between the Russian Federation and the United States to enhance the existing nuclear-material protection, control, and accounting systems at Mayak Production Association

    SciTech Connect (OSTI)

    Starodubtsev, G.S.; Prishchepov, A.I.; Zatorsky, Y.M.; James, L.T. [and others

    1997-11-01

    The Ministry of the Russian Federation for Atomic Energy (MINATOM) and the US Department of Energy (DOE) are engaged in joint, cooperative efforts to reduce the likelihood of nuclear proliferation by enhancing Material Protection, Control and Accounting (MPC&A) systems in both countries. Mayak Production Association (MPA) is a major Russian nuclear enterprise within the nuclear complex that is operated by MINATOM. This paper describes the nature, scope, and status of the joint, cooperative efforts to enhance existing MPC&A systems at MPA. Current cooperative efforts are focused on enhancements to the existing MPC&A systems at four plants that are operated by MPA and that produce, process, handle and/or store proliferation-sensitive nuclear materials.

  2. Cooperation between the Russian Federation and the United States to enhance the existing nuclear-material protection, control, and accounting systems at Mayak Production Association

    SciTech Connect (OSTI)

    Prishchepov, A.I.; Starodubtsev, G.S.; Zatorsky, Y.M. [Mayak Production Association, Ozersk City (Russian Federation); James, L.T. [Sandia National Labs., Albuquerque, NM (United States); Ehinger, M.H. [Oak Ridge National Lab., TN (United States); Manatt, D.R. [Lawrence Livermore National Lab., CA (United States); Voss, S.S. [Los Alamos National Lab., NM (United States); Lundgren, R.A. [Pacific Northwest National Lab., Richland, WA (United States); Suda, S.C. [Brookhaven National Lab., Upton, NY (United States)

    1998-08-01

    The Ministry of the Russian Federation for Atomic Energy (MINATOM) and the US Department of Energy (DOE) are engaged in joint, cooperative efforts to reduce the likelihood of nuclear proliferation by enhancing Material Protection, Control and Accounting (MPC and A) systems in both countries. Mayak Production Association (Mayak) is a major Russian nuclear enterprise within the nuclear complex that is operated by MINATOM. This paper describes the nature, scope, and status of the joint, cooperative efforts to enhance existing MPC and A systems at Mayak. Current cooperative efforts are focused on enhancements to the existing MPC and A systems at two plants that are operated by Mayak and that produce, process, handle and/or store proliferation-sensitive nuclear materials.

  3. Cooperation Between the Russia Federation and the United States to Enhance the Existing Nuclear-Material Protection, Control, and Accounting Systems at Mayak Production Association

    SciTech Connect (OSTI)

    Cahalane, P.T.; Ehinger, M.H.; James, L.T.; Jarrett, J.H.; Lundgren, R.A.; Manatt, D.R.; Niederauer, G.F.; Olivos, J.D.; Prishchepov, A.I.; Starodubtsev, G.S.; Suda, S.C.; Tittemore, G.W.; Zatorsky, Y.M.

    1999-07-19

    The Ministry of the Russian Federation for Atomic Energy (MINATOM) and the US Department of Energy (DOE) are engaged in joint, cooperative efforts to reduce the likelihood of nuclear proliferation by enhancing Material Protection, Control and Accounting (MPC&A) systems in both countries. Mayak Production Association (Mayak) is a major Russian nuclear enterprise within the nuclear complex that is operated by lylINATOM. This paper describes the nature, scope, and status of the joint, cooperative efforts to enhance existing MPC&A systems at Mayak. Current cooperative efforts are focused on enhancements to the existing MPC&A systems at two of the plants operated by Mayak that work with proliferation-sensitive nuclear materials.

  4. The Application of L-systems and Developmental Models to Computer Art,

    E-Print Network [OSTI]

    McCormack, Jon

    The Application of L-systems and Developmental Models to Computer Art, Animation, and Music Synthesis Jon McCormack, B.Sc.(Hons), Grad Dip. Art (Film & Television) A Thesis Submitted for the Degree.3.1 Generative Modelling Systems ................................................ 8 1.3.2 Critical and Art

  5. Cooling laser system for quantum computing with barium-137 ions Tom Chartrand

    E-Print Network [OSTI]

    Blinov, Boris

    Cooling laser system for quantum computing with barium-137 ions Tom Chartrand Department of Physics of a powerful 493 nm laser source for cooling, by the resonant frequency doubling of a 986 nm external cavity diode lasers (ECDL), in a bowtie cavity with stabilization system. I. INTRODUCTION Trapped ions

  6. A COMPUTATIONAL METHOD TO EXTRACT MACROSCOPIC VARIABLES AND THEIR DYNAMICS IN MULTISCALE SYSTEMS

    E-Print Network [OSTI]

    Gottwald, Georg A.

    A COMPUTATIONAL METHOD TO EXTRACT MACROSCOPIC VARIABLES AND THEIR DYNAMICS IN MULTISCALE SYSTEMS-independent methods for analysing multiscale dy- namical systems using numerical techniques based on the transfer operator and its adjoint. In particular, we present a method for testing whether an arbitrary dynamical

  7. The Eucalyptus Open-source Cloud-computing System Daniel Nurmi, Rich Wolski, Chris Grzegorczyk

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    The Eucalyptus Open-source Cloud-computing System Daniel Nurmi, Rich Wolski, Chris Grzegorczyk to be instrumented and modified by systems researchers. In this work, we present EUCALYPTUS ­ an open- source deployed across a variety physical resources. We outline the ba- sic principles of the EUCALYPTUS design

  8. A Prototype English-Japanese Machine Translation System for Translating IBM Computer Manuals

    E-Print Network [OSTI]

    A Prototype English-Japanese Machine Translation System for Translating IBM Computer Manuals TaiJiro Tsutsumi Natural Language Processing Science Institute, IBM Japan, Ltd. 5-19, Sanban-cho, Chlyoda-ku Tokyo developed at the Sci- ence Institute of IBM Japan, Ltd. This MT system cur- rently aims at the translation

  9. Computation of Lyapunov Functions for Smooth Nonlinear Systems using Convex Optimization

    E-Print Network [OSTI]

    Johansen, Tor Arne

    Computation of Lyapunov Functions for Smooth Nonlinear Systems using Convex Optimization Tor A that for smooth nonlinear systems conditions for the existence of a Lyapunov function that guarantees uniform assuming a general linearly parameterized class of smooth non­quadratic Lyapunov­function candidates. Hence

  10. Designing Computer Systems With MEMS-based Storage Steven W. Schlosser, John Linwood Grin,

    E-Print Network [OSTI]

    Designing Computer Systems With MEMS-based Storage Steven W. Schlosser, John Linwood GriÆn, David F architects. An exciting new storage technology based on microelectromechanical systems (MEMS) is poised many new classes of applications. This research explores the impact that several di#11;erent MEMS

  11. Computer simulation of magnetization-controlled shunt reactors for calculating electromagnetic transients in power systems

    SciTech Connect (OSTI)

    Karpov, A. S. [St Petersburg State Polytechnical University, JSC 'System Operator of the United Power System', Leningradskoe RDU (Russian Federation)] [St Petersburg State Polytechnical University, JSC 'System Operator of the United Power System', Leningradskoe RDU (Russian Federation)

    2013-01-15

    A computer procedure for simulating magnetization-controlled dc shunt reactors is described, which enables the electromagnetic transients in electric power systems to be calculated. It is shown that, by taking technically simple measures in the control system, one can obtain high-speed reactors sufficient for many purposes, and dispense with the use of high-power devices for compensating higher harmonic components.

  12. vGreen: A System for Energy Efficient Computing in Virtualized Environments

    E-Print Network [OSTI]

    Simunic, Tajana

    vGreen: A System for Energy Efficient Computing in Virtualized Environments Gaurav Dhiman gdhiman that vGreen can improve both performance and system level energy savings by 20% and 15% across benchmarks with the ob- jective of managing the overall energy efficiency and performance. The basic premise behind vGreen

  13. BOLD VENTURE COMPUTATION SYSTEM for nuclear reactor core analysis, Version III

    SciTech Connect (OSTI)

    Vondy, D.R.; Fowler, T.B.; Cunningham, G.W. III.

    1981-06-01

    This report is a condensed documentation for VERSION III of the BOLD VENTURE COMPUTATION SYSTEM for nuclear reactor core analysis. An experienced analyst should be able to use this system routinely for solving problems by referring to this document. Individual reports must be referenced for details. This report covers basic input instructions and describes recent extensions to the modules as well as to the interface data file specifications. Some application considerations are discussed and an elaborate sample problem is used as an instruction aid. Instructions for creating the system on IBM computers are also given.

  14. Systems, methods and computer readable media for estimating capacity loss in rechargeable electrochemical cells

    DOE Patents [OSTI]

    Gering, Kevin L.

    2013-06-18

    A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware periodically samples charge characteristics of the electrochemical cell. The computing system periodically determines cell information from the charge characteristics of the electrochemical cell. The computing system also periodically adds a first degradation characteristic from the cell information to a first sigmoid expression, periodically adds a second degradation characteristic from the cell information to a second sigmoid expression and combines the first sigmoid expression and the second sigmoid expression to develop or augment a multiple sigmoid model (MSM) of the electrochemical cell. The MSM may be used to estimate a capacity loss of the electrochemical cell at a desired point in time and analyze other characteristics of the electrochemical cell. The first and second degradation characteristics may be loss of active host sites and loss of free lithium for Li-ion cells.

  15. Systems, methods and computer-readable media to model kinetic performance of rechargeable electrochemical devices

    DOE Patents [OSTI]

    Gering, Kevin L.

    2013-01-01

    A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware samples performance characteristics of the electrochemical cell. The computing system determines cell information from the performance characteristics. The computing system also analyzes the cell information of the electrochemical cell with a Butler-Volmer (BV) expression modified to determine exchange current density of the electrochemical cell by including kinetic performance information related to pulse-time dependence, electrode surface availability, or a combination thereof. A set of sigmoid-based expressions may be included with the modified-BV expression to determine kinetic performance as a function of pulse time. The determined exchange current density may be used with the modified-BV expression, with or without the sigmoid expressions, to analyze other characteristics of the electrochemical cell. Model parameters can be defined in terms of cell aging, making the overall kinetics model amenable to predictive estimates of cell kinetic performance along the aging timeline.

  16. Systems, methods and computer-readable media for modeling cell performance fade of rechargeable electrochemical devices

    DOE Patents [OSTI]

    Gering, Kevin L

    2013-08-27

    A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware periodically samples performance characteristics of the electrochemical cell. The computing system determines cell information from the performance characteristics of the electrochemical cell. The computing system also develops a mechanistic level model of the electrochemical cell to determine performance fade characteristics of the electrochemical cell and analyzing the mechanistic level model to estimate performance fade characteristics over aging of a similar electrochemical cell. The mechanistic level model uses first constant-current pulses applied to the electrochemical cell at a first aging period and at three or more current values bracketing a first exchange current density. The mechanistic level model also is based on second constant-current pulses applied to the electrochemical cell at a second aging period and at three or more current values bracketing the second exchange current density.

  17. Modeling Computational Security in LongLived Systems # ## Ran Canetti 1,2 , Ling Cheung 2 , Dilsun Kaynar 3 ,

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Modeling Computational Security in Long­Lived Systems # ## Ran Canetti 1,2 , Ling Cheung 2 , Dilsun Introduction Computational security in long­lived systems: Security properties of cryptographic protocols computational power. This type of security degrades progressively over the lifetime of a protocol. However, some

  18. 3rd Workshop on System-level Virtualization for High Performance Computing (HPCVirt) 2009, Nuremberg, Germany, March 30, 2009

    E-Print Network [OSTI]

    Engelmann, Christian

    3rd Workshop on System-level Virtualization for High Performance Computing (HPCVirt) 2009 for High Performance Computing (HPCVirt) 2009, Nuremberg, Germany, March 30, 2009 Outline · Background work #12;3/193rd Workshop on System-level Virtualization for High Performance Computing (HPCVirt) 2009

  19. Federal Reserve Bank of New York Staff Reports

    E-Print Network [OSTI]

    Federal Reserve Bank of New York Staff Reports Congestion and Cascades in Payment Systems Walter E and are not necessarily reflective of views at the Federal Reserve Bank of New York or the Federal Reserve System. Any Walter E. Beyeler, Robert J. Glass, Morten Bech, and Kimmo Soramäki Federal Reserve Bank of New York

  20. Evaluation of Revised Computer-Based Procedure System Prototype

    SciTech Connect (OSTI)

    Katya Le Blanc; Johanna Oxstrand; Cheradan Fikstad

    2013-01-01

    The nuclear power industry is very procedure driven, i.e. almost all activities that take place at a nuclear power plant are conducted by following procedures. The paper-based procedures (PBPs) currently used by the industry do a good job at keeping the industry safe. However, these procedures are most often paired with methods and tools put in place to anticipate, prevent, and catch errors related to hands-on work. These tools are commonly called human performance tools. The drawback with the current implementation of these tools is that the task of performing one procedure becomes time and labor intensive. For example, concurrent and independent verification of procedure steps are required at times, which essentially means that at least two people have to be actively involved in the task. Even though the current use of PBPs and human performance tools are keeping the industry safe, there is room for improvement. The industry could potentially increase their efficiency and safety by replacing their existing PBPs with CBPs. If implemented correctly, the CBP system could reduce the time and focus spent on using the human performance tools. Some of the tools can be completely incorporated in the CBP system in a manner that the performer does not think about the fact that these tools are being used. Examples of these tools are procedure use and adherence, placekeeping, and peer checks. Other tools can be partly integrated in a fashion that reduce the time and labor they require, such as concurrent and independent verification. The incorporation of advanced technology, such as CBP systems, may help to manage the effects of aging systems, structures, and components. The introduction of advanced technology may also make the existing LWR fleet more attractive to the future workforce, which will be of importance when the future workforce will chose between existing fleet and the newly built nuclear power plants.

  1. Science-driven system architecture: A new process for leadership class computing

    SciTech Connect (OSTI)

    Simon, Horst; Kramer, William; Saphir, William; Shalf, John; Bailey, David; Oliker, Leonid; Banda, Michael; McCurdy, C. William; Hules, John; Canning, Andrew; Day, Marc; Colella, Philip; Serafini, David; Wehner, Michael; Nugent, Peter

    2004-10-19

    Over the past several years, computational scientists have observed a frustrating trend of stagnating application performance despite dramatic increases in peak performance of high performance computers. In 2002, researchers at Lawrence Berkeley National Laboratory, Argonne National Laboratory, and IBM proposed a new process to reverse this situation [1]. This strategy is based on new types of development partnerships with computer vendors based on the concept of science-driven computer system design. This strategy will engage applications scientists well before an architecture is available for commercialization. The process is already producing results, and has further potential for dramatically improving system efficiency. This paper documents the progress to date and the potential for future benefits. An example of this process is discussed, using IBM Power architecture with a computer architecture design that can lead to a sustained performance of 50 to 100 Tflo p/s on a broad spectrum of applications in 2006 for a reasonable cost. This partnership will establish a collaborative approach to modifying computer architecture to enable heretofore unrealized achievements in computer capability-limited fields such as nanoscience, combustion modeling, fusion, climate modeling, and astrophysics.

  2. GPU computing for 2-d spin systems: CUDA vs OpenGL

    E-Print Network [OSTI]

    Viola Anselmi; Giovanni Conti; Francesco Di Renzo

    2008-11-13

    In recent years the more and more powerful GPU's available on the PC market have attracted attention as a cost effective solution for parallel (SIMD) computing. CUDA is a solid evidence of the attention that the major companies are devoting to the field. CUDA is a hardware and software architecture developed by Nvidia for computing on the GPU. It qualifies as a friendly alternative to the approach to GPU computing that has been pioneered in the OpenGL environment. We discuss the application of both the CUDA and the OpenGL approach to the simulation of 2-d spin systems (XY model).

  3. Enhanced fault-tolerant quantum computing in $d$-level systems

    E-Print Network [OSTI]

    Earl T. Campbell

    2014-06-11

    Error correcting codes protect quantum information and form the basis of fault tolerant quantum computing. Leading proposals for fault-tolerant quantum computation require codes with an exceedingly rare property, a transverse non-Clifford gate. Codes with the desired property are presented for $d$-level, qudit, systems with prime $d$. The codes use $n=d-1$ qudits and can detect upto $\\sim d/3$ errors. We quantify the performance of these codes for one approach to quantum computation, known as magic state distillation. Unlike prior work, we find performance is always enhanced by increasing $d$.

  4. Future Generation Computer Systems 29 (2013) 10121023 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    Melbourne, University of

    2013-01-01

    Future Generation Computer Systems 29 (2013) 1012­1023 Contents lists available at SciVerse Science (e.g., water, electricity and gas). The three main services are provided by the Cloud computing ar

  5. A computer simulation of a generalized police patrol system 

    E-Print Network [OSTI]

    Dozier, Harold Wallace

    1975-01-01

    of barriers to travel FIGURE 14 ~ FIGURE 15. Examples of the use of linearized barriers to simulate a non-linear barrier. The points used in the array CARS to describe a patrol sector. 85 FIGURE 'l6. FIGURE 17. Example of data output from a trial... modifications. Though they do not realize it, , the public is also involved in these tests as it is their safety that is being tested. Some pre-screening of proposed mod- ification is called for to help identify system modifications that may prove unwise...

  6. Limited Lookahead Control for Performance Management inLimited Lookahead Control for Performance Management in Computing SystemsComputing Systems

    E-Print Network [OSTI]

    Abdelwahed, Sherif

    components connected via communication networks. Such systems will support a range of mission-critical states up to certain depth. · A path that minimizes the distance to Xs is traced back to current state representation of the processor at the active mode. · Objective: identify relevant data from incoming signals

  7. Federal Electronics Challenge Gold Award | Department of Energy

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

    DOE Headquarters was presented the Federal Electronics Challenge Gold Award for exemplary performance in Green Computing, including green procurement, energy efficient operations...

  8. On theoretical issues of computer simulations sequential dynamical systems

    SciTech Connect (OSTI)

    Barrett, C.L.; Mortveit, H.S.; Reidys, C.M.

    1998-12-01

    The authors study a class of discrete dynamical systems that is motivated by the generic structure of simulations. The systems consist of the following data: (a) a finite graph Y with vertex set {l_brace}1,...,n{r_brace} where each vertex has a binary state, (b) functions F{sub i}:F{sub 2}{sup n} {r_arrow} F{sub 2}{sup n} and (c) an update ordering {pi}. The functions F{sub i} update the binary state of vertex i as a function of the state of vertex i and its Y-neighbors and leave the states of all other vertices fixed. The update ordering is a permutation of the Y-vertices. They derive a decomposition result, characterize invertible SDS and study fixed points. In particular they analyze how many different SDS that can be obtained by reordering a given multiset of update functions and give a criterion for when one can derive concentration results on this number. Finally, some specific SDS are investigated.

  9. DualTrust: A Trust Management Model for Swarm-Based Autonomic Computing Systems

    SciTech Connect (OSTI)

    Maiden, Wendy M.

    2010-05-01

    Trust management techniques must be adapted to the unique needs of the application architectures and problem domains to which they are applied. For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, certain characteristics of the mobile agent ant swarm -- their lightweight, ephemeral nature and indirect communication -- make this adaptation especially challenging. This thesis looks at the trust issues and opportunities in swarm-based autonomic computing systems and finds that by monitoring the trustworthiness of the autonomic managers rather than the swarming sensors, the trust management problem becomes much more scalable and still serves to protect the swarm. After analyzing the applicability of trust management research as it has been applied to architectures with similar characteristics, this thesis specifies the required characteristics for trust management mechanisms used to monitor the trustworthiness of entities in a swarm-based autonomic computing system and describes a trust model that meets these requirements.

  10. Storing files in a parallel computing system based on user-specified parser function

    DOE Patents [OSTI]

    Faibish, Sorin; Bent, John M; Tzelnic, Percy; Grider, Gary; Manzanares, Adam; Torres, Aaron

    2014-10-21

    Techniques are provided for storing files in a parallel computing system based on a user-specified parser function. A plurality of files generated by a distributed application in a parallel computing system are stored by obtaining a parser from the distributed application for processing the plurality of files prior to storage; and storing one or more of the plurality of files in one or more storage nodes of the parallel computing system based on the processing by the parser. The plurality of files comprise one or more of a plurality of complete files and a plurality of sub-files. The parser can optionally store only those files that satisfy one or more semantic requirements of the parser. The parser can also extract metadata from one or more of the files and the extracted metadata can be stored with one or more of the plurality of files and used for searching for files.

  11. Computational method and system for modeling, analyzing, and optimizing DNA amplification and synthesis

    DOE Patents [OSTI]

    Vandersall, Jennifer A.; Gardner, Shea N.; Clague, David S.

    2010-05-04

    A computational method and computer-based system of modeling DNA synthesis for the design and interpretation of PCR amplification, parallel DNA synthesis, and microarray chip analysis. The method and system include modules that address the bioinformatics, kinetics, and thermodynamics of DNA amplification and synthesis. Specifically, the steps of DNA selection, as well as the kinetics and thermodynamics of DNA hybridization and extensions, are addressed, which enable the optimization of the processing and the prediction of the products as a function of DNA sequence, mixing protocol, time, temperature and concentration of species.

  12. Task-Based Optimization of Computed Tomography Imaging Systems

    E-Print Network [OSTI]

    Sanchez, Adrian A

    2015-01-01

    The goal of this thesis is to provide a framework for the use of task-based metrics of image quality to aid in the design, implementation, and evaluation of CT image reconstruction algorithms and CT systems in general. We support the view that task-based metrics of image quality can be useful in guiding the algorithm design and implementation process in order to yield images of objectively superior quality and higher utility for a given task. Further, we believe that metrics such as the Hotelling observer (HO) SNR can be used as summary scalar metrics of image quality for the evaluation of images produced by novel reconstruction algorithms. In this work, we aim to construct a concise and versatile formalism for image reconstruction algorithm design, implementation, and assessment. The bulk of the work focuses on linear analytical algorithms, specifically the ubiquitous filtered back-projection (FBP) algorithm. However, due to the demonstrated importance of optimization-based algorithms in a wide variety of CT...

  13. Int. J. Critical Computer-Based Systems, Vol. 2, No. 1, 2011 SPECIAL ISSUE: AUTONOMOUS DECENTRALISED SYSTEMS IN WEB

    E-Print Network [OSTI]

    Chen, Yinong

    -critical certification authority architecture for high reliability and response time Luis Carlos Coronado demand-oriented streaming system architecture and fault-tolerant technology for service continuity at the University of the Witwatersrand, South Africa, and joined the Faculty in Computer Science and Engineering

  14. Time Utility Functions for Modeling and Evaluating Resource Allocations in a Heterogeneous Computing System

    SciTech Connect (OSTI)

    Briceno, Luis Diego [Colorado State University, Fort Collins; Khemka, Bhavesh [Colorado State University, Fort Collins; Siegel, Howard Jay [Colorado State University, Fort Collins; Maciejewski, Anthony A [ORNL; Groer, Christopher S [ORNL; Koenig, Gregory A [ORNL; Okonski, Gene D [ORNL; Poole, Stephen W [ORNL

    2011-01-01

    This study considers a heterogeneous computing system and corresponding workload being investigated by the Extreme Scale Systems Center (ESSC) at Oak Ridge National Laboratory (ORNL). The ESSC is part of a collaborative effort between the Department of Energy (DOE) and the Department of Defense (DoD) to deliver research, tools, software, and technologies that can be integrated, deployed, and used in both DOE and DoD environments. The heterogeneous system and workload described here are representative of a prototypical computing environment being studied as part of this collaboration. Each task can exhibit a time-varying importance or utility to the overall enterprise. In this system, an arriving task has an associated priority and precedence. The priority is used to describe the importance of a task, and precedence is used to describe how soon the task must be executed. These two metrics are combined to create a utility function curve that indicates how valuable it is for the system to complete a task at any given moment. This research focuses on using time-utility functions to generate a metric that can be used to compare the performance of different resource schedulers in a heterogeneous computing system. The contributions of this paper are: (a) a mathematical model of a heterogeneous computing system where tasks arrive dynamically and need to be assigned based on their priority, precedence, utility characteristic class, and task execution type, (b) the use of priority and precedence to generate time-utility functions that describe the value a task has at any given time, (c) the derivation of a metric based on the total utility gained from completing tasks to measure the performance of the computing environment, and (d) a comparison of the performance of resource allocation heuristics in this environment.

  15. A grid-enabled MPI : message passing in heterogeneous distributed computing systems.

    SciTech Connect (OSTI)

    Foster, I.; Karonis, N. T.

    2000-11-30

    Application development for high-performance distributed computing systems, or computational grids as they are sometimes called, requires grid-enabled tools that hide mundate aspects of the heterogeneous grid environment without compromising performance. As part of an investigation of these issues, they have developed MPICH-G, a grid-enabled implementation of the Message Passing Interface (MPI) that allows a user to run MPI programs across multiple computers at different sites using the same commands that would be used on a parallel computer. This library extends the Argonne MPICH implementation of MPI to use services provided by the globus grid toolkit. In this paper, they describe the MPICH-G implementation and present preliminary performance results.

  16. System design and algorithmic development for computational steering in distributed environments

    SciTech Connect (OSTI)

    Wu, Qishi; Zhu, Mengxia; Gu, Yi; Rao, Nageswara S

    2010-03-01

    Supporting visualization pipelines over wide-area networks is critical to enabling large-scale scientific applications that require visual feedback to interactively steer online computations. We propose a remote computational steering system that employs analytical models to estimate the cost of computing and communication components and optimizes the overall system performance in distributed environments with heterogeneous resources. We formulate and categorize the visualization pipeline configuration problems for maximum frame rate into three classes according to the constraints on node reuse or resource sharing, namely no, contiguous, and arbitrary reuse. We prove all three problems to be NP-complete and present heuristic approaches based on a dynamic programming strategy. The superior performance of the proposed solution is demonstrated with extensive simulation results in comparison with existing algorithms and is further evidenced by experimental results collected on a prototype implementation deployed over the Internet.

  17. Federal Resume Guide

    Broader source: Energy.gov [DOE]

    This Learning Module will offer helpful tips and suggestions on the development of a federal resume.

  18. IRRADIANCE MAPS APPLIED FOR THE PERFORMANCE ASSESSMENT OF PV SYSTEMS -A CASE STUDY FOR THE GERMAN FEDERAL STATE OF SAXONY

    E-Print Network [OSTI]

    Heinemann, Detlev

    IRRADIANCE MAPS APPLIED FOR THE PERFORMANCE ASSESSMENT OF PV SYSTEMS - A CASE STUDY FOR THE GERMAN and the month by month check of a PV system's performance, methods based on irradiance maps published by weather DWD or the data bank of hourly irradiance data with continuous spatial coverage prepared

  19. Fermilab Central Computing Facility: Energy conservation report and mechanical systems design optimization and cost analysis study

    SciTech Connect (OSTI)

    Krstulovich, S.F.

    1986-11-12

    This report is developed as part of the Fermilab Central Computing Facility Project Title II Design Documentation Update under the provisions of DOE Document 6430.1, Chapter XIII-21, Section 14, paragraph a. As such, it concentrates primarily on HVAC mechanical systems design optimization and cost analysis and should be considered as a supplement to the Title I Design Report date March 1986 wherein energy related issues are discussed pertaining to building envelope and orientation as well as electrical systems design.

  20. Problem Motivation Problem setup Solution Special case Conclusions Computation of Chopped System Norm

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    Problem Motivation Problem setup Solution Special case Conclusions Computation of Chopped System Norm Hanumant Singh Shekhawat University of Twente March 11, 2010 #12;Problem Motivation Problem setup Solution Special case Conclusions Overview 1 Problem 2 Motivation 3 Problem setup 4 Solution 5 Special case

  1. Between Service Science and Service-Oriented Software Systems Faculty of Computer Science

    E-Print Network [OSTI]

    Yan, Yuhong

    1 Between Service Science and Service-Oriented Software Systems Yuhong Yan Faculty of Computer. Introduction Service Science is promoted by many leading IT companies, such as IBM and SAP. These companies Science University of New Brunswick Canada Yuhong.yan@unb.ca Juergen Bode International School

  2. Computing (r, Q) Policy for an Inventory System with Limited Sharable Resource

    E-Print Network [OSTI]

    Xie, Jinxing

    Computing (r, Q) Policy for an Inventory System with Limited Sharable Resource Xiaobo Zhao1 , Minmin Qiu2 , Jinxing Xie3 and Qiming He4 1 Department of Industrial Engineering, Tsinghua University, Beijing 100084, China. 2 IBM China Research Lab, Beijing 100193, China. 3 Department of Mathematical

  3. TIMING-ACCURATE STORAGE EMULATION: EVALUATING HYPOTHETICAL STORAGE COMPONENTS IN REAL COMPUTER SYSTEMS

    E-Print Network [OSTI]

    TIMING-ACCURATE STORAGE EMULATION: EVALUATING HYPOTHETICAL STORAGE COMPONENTS IN REAL COMPUTER;ABSTRACT Timing-accurate storage emulation offers a unique performance evaluation capability to experiment with not-yet-existing storage components in the context of real systems executing real

  4. A Computable Criterion for Partial Entanglement in Continuous Variable Quantum Systems

    E-Print Network [OSTI]

    Andreas Gabriel; Marcus Huber; Sasa Radic; Beatrix C. Hiesmayr

    2011-04-06

    A general and computable criterion for k-(in)separability in continuous multipartite quantum systems is presented. The criterion can be experimentally implemented with a finite and comparatively low number of local observables. We discuss in detail how the detection quality can be optimised.

  5. Final report for Conference Support Grant "From Computational Biophysics to Systems Biology - CBSB12"

    SciTech Connect (OSTI)

    Hansmann, Ulrich H.E.

    2012-07-02

    This report summarizes the outcome of the international workshop �From Computational Biophysics to Systems Biology (CBSB12)� which was held June 3-5, 2012, at the University of Tennessee Conference Center in Knoxville, TN, and supported by DOE through the Conference Support Grant 120174. The purpose of CBSB12 was to provide a forum for the interaction between a data-mining interested systems biology community and a simulation and first-principle oriented computational biophysics/biochemistry community. CBSB12 was the sixth in a series of workshops of the same name organized in recent years, and the second that has been held in the USA. As in previous years, it gave researchers from physics, biology, and computer science an opportunity to acquaint each other with current trends in computational biophysics and systems biology, to explore venues of cooperation, and to establish together a detailed understanding of cells at a molecular level. The conference grant of $10,000 was used to cover registration fees and provide travel fellowships to selected students and postdoctoral scientists. By educating graduate students and providing a forum for young scientists to perform research into the working of cells at a molecular level, the workshop adds to DOE's mission of paving the way to exploit the abilities of living systems to capture, store and utilize energy.

  6. UNIVERSITY OF CALIFORNIA, SAN DIEGO Temperature and Cooling Management in Computing Systems

    E-Print Network [OSTI]

    Simunic, Tajana

    UNIVERSITY OF CALIFORNIA, SAN DIEGO Temperature and Cooling Management in Computing Systems . . . . . . . . . . . 3 1.2 Related work on cooling management . . . . . . . . . . . 5 1.3 Thesis contributions . . . . . . . . . . . . . . . . . . . . . . 39 Chapter 4 Thermal and Cooling Management in Multisocket CPU Servers 41 4.1 Multi-tier thermal

  7. An hp adaptive strategy to compute the vibration modes of a fluid-solid coupled system

    E-Print Network [OSTI]

    Rodríguez, Rodolfo

    )], for the operational state, the fuel assembly in nuclear plants should be designed so that they cannot be unacceptablyAn hp adaptive strategy to compute the vibration modes of a fluid-solid coupled system M element method to solve a two- dimensional fluid-structure vibration problem. This problem arises from

  8. FAST NUMERICAL ALGORITHMS FOR THE COMPUTATION OF INVARIANT TORI IN HAMILTONIAN SYSTEMS

    E-Print Network [OSTI]

    FAST NUMERICAL ALGORITHMS FOR THE COMPUTATION OF INVARIANT TORI IN HAMILTONIAN SYSTEMS GEMMA HUGUET manifolds of whiskered tori. Moreover, we present fast algorithms for the iteration of the quasi and fast. We postpone to a future paper optimized implementations and results on the breakdown of invariant

  9. A Taxonomy of Scientific Workflow Systems for Grid Computing Jia Yu and Rajkumar Buyya*

    E-Print Network [OSTI]

    Melbourne, University of

    1 A Taxonomy of Scientific Workflow Systems for Grid Computing Jia Yu and Rajkumar Buyya* Grid a taxonomy that characterizes and classifies various approaches for building and executing workflows on Grids. The taxonomy not only highlights the design and engineering similarities and differences of state

  10. Fundamentals to Computer-Aided Design of VLSI Circuits and Systems

    E-Print Network [OSTI]

    He, Lei

    EE 201A Fundamentals to Computer-Aided Design of VLSI Circuits and Systems Instructor: Lei He Email, Introduction to algorithms uu EE 136, Introduction to engineering optimizationEE 136, Introduction to engineering optimization techniquestechniques #12;EE201A Outline and Schedule nn Circuit platforms and models

  11. DOE Issues Funding Opportunity for Advanced Computational and Modeling Research for the Electric Power System

    Broader source: Energy.gov [DOE]

    The objective of this Funding Opportunity Announcement (FOA) is to leverage scientific advancements in mathematics and computation for application to power system models and software tools, with the long-term goal of enabling real-time protection and control based on wide-area sensor measurements.

  12. The Flask Security Architecture: System Support for Diverse Security Policies Ray Spencer Secure Computing Corporation

    E-Print Network [OSTI]

    Andersen, Dave

    Computing Corporation Stephen Smalley, Peter Loscocco National Security Agency Mike Hibler, David AndersenThe Flask Security Architecture: System Support for Diverse Security Policies Ray Spencer Secure be flexible in their support for security policies, providing sufficient mechanisms for supporting the wide

  13. Methods, systems, and computer program products for network firewall policy optimization

    DOE Patents [OSTI]

    Fulp, Errin W. (Winston-Salem, NC); Tarsa, Stephen J. (Duxbury, MA)

    2011-10-18

    Methods, systems, and computer program products for firewall policy optimization are disclosed. According to one method, a firewall policy including an ordered list of firewall rules is defined. For each rule, a probability indicating a likelihood of receiving a packet matching the rule is determined. The rules are sorted in order of non-increasing probability in a manner that preserves the firewall policy.

  14. Principles of a Computer Immune System Anil Somayaji, Steven Hofmeyr, & Stephanie Forrest

    E-Print Network [OSTI]

    Somayaji, Anil

    Department of Computer Science University of New Mexico Albuquerque, NM 87131 soma, steveah, forrest¡ @cs of the Internet. Immune systems have many features that are desirable for the im- perfect, uncontrolled, and open vulnera- bilities. Whether it is the latest UNIX buffer overflow or bug in Microsoft Internet Explorer

  15. Launching applications on compute and service processors running under different operating systems in scalable network of processor boards with routers

    DOE Patents [OSTI]

    Tomkins, James L. (Albuquerque, NM); Camp, William J. (Albuquerque, NM)

    2009-03-17

    A multiple processor computing apparatus includes a physical interconnect structure that is flexibly configurable to support selective segregation of classified and unclassified users. The physical interconnect structure also permits easy physical scalability of the computing apparatus. The computing apparatus can include an emulator which permits applications from the same job to be launched on processors that use different operating systems.

  16. 24CSI Communications J U L Y 2 0 0 5 Keywords: Sensors, Sensor Networks, Grid computing,

    E-Print Network [OSTI]

    Buyya, Rajkumar

    , Grid computing, SensorML, SensorWeb. 1. Introduction Recent advances in electronic circuit miniaturization and micro-electromechanical systems (MEMS) have led to the creation of small sensor nodes which in the technology landscape is grid computing, which is essentially the federation of heterogeneous computational

  17. Office of Inspector General audit report on the U.S. Department of Energy`s funds distribution and control system at the Federal Energy Technology Center

    SciTech Connect (OSTI)

    NONE

    1999-04-01

    In Fiscal Year 1998, the Federal Energy Technology Center (FETC) was responsible for managing about $723 million in budgetary resources. The objective of this audit was to determine if FETC had a funds distribution and control system to ensure appropriated funds were managed in accordance with congressional intent and applicable policies and procedures. Improvements are needed in FETC`s administration of budgetary and accounting transactions. FETC did not have a comprehensive system to allocate indirect costs to funding programs and work-for-others projects. In addition, FETC did not completely adhere to Headquarters Clean Coal budget direction. The Office of Inspector General (OIG) reached its conclusions despite a scope impairment. Written documentation was not always available, and the audit team did not have ready access to key personnel who could explain certain transactions and management practices and procedures. In order to strengthen the FETC financial management system, the OIG recommended (1) the development of policies, procedures, and practices to accurately collect and allocate indirect costs and (2) improvements in internal control procedures. The OIG also recommended that the Chief Financial Officer conduct a detailed for cause review of the financial management practices at FETC and work with the Office of Field Management to develop a schedule for reviewing the financial management systems of all Departmental elements.

  18. Development of an Implementation Plan Related to Biological Opinion on Operation of the Federal Columbia River Power System ; Step 1: Review and Critique of Implementation Plans.

    SciTech Connect (OSTI)

    Neitzel, Duane A.; Bunn, Amoret

    2000-12-01

    The Draft Biological Opinion on Operation of the Federal Columbia River Power System calls for the development of 1- and 5-year implementation plans. These plans will provide the roadmap for planning and subsequent implementation of actions intended to meet specific performance standards (i.e., biological objectives) in a timely manner. To develop implementation plans the key tasks and sequences of steps must be determined. Those responsible for specific tasks must be identified and they must understand what they need to do. There must be assurances that the resources (human, physical, and fiscal) to complete the tasks are available. Motivation and incentive systems should be set up. Systems to coordinate efforts and guide activity must be devised and installed. An information management system must be designed to manage and analyze data and ensure that appropriate data are collected. This will aid managers in assessing whether individual activities or actions are tracking with stated goals and objectives. Training programs to improve managerial and worker capability in making and implementing plans should be designed. Managerial leadership to guide the efforts of all individuals in achieving the goals of the anadromous and resident fish recovery must be developed. It is the entire process of managing fish recovery in relationship to the Biological Opinion that will guide, coordinate, motivate, and control work and determine the effectiveness and efficiency of plan implementation.

  19. Emergency Response Equipment and Related Training: Airborne Radiological Computer System (Model II)

    SciTech Connect (OSTI)

    David P. Colton

    2007-02-28

    The materials included in the Airborne Radiological Computer System, Model-II (ARCS-II) were assembled with several considerations in mind. First, the system was designed to measure and record the airborne gamma radiation levels and the corresponding latitude and longitude coordinates, and to provide a first overview look of the extent and severity of an accident's impact. Second, the portable system had to be light enough and durable enough that it could be mounted in an aircraft, ground vehicle, or watercraft. Third, the system must control the collection and storage of the data, as well as provide a real-time display of the data collection results to the operator. The notebook computer and color graphics printer components of the system would only be used for analyzing and plotting the data. In essence, the provided equipment is composed of an acquisition system and an analysis system. The data can be transferred from the acquisition system to the analysis system at the end of the data collection or at some other agreeable time.

  20. Beam diagnostics and beam handling systems; Proceedings of the Meeting, Hamburg, Federal Republic of Germany, Sept. 21, 22, 1988

    SciTech Connect (OSTI)

    Sona, A.

    1989-01-01

    Papers on beam diagnostics and beam handling systems are presented, including topics such as matrials processing with laser radiation, diagnostics of high-power laser beams, beam quality evaluation of a high power fast axial flow CO2 laser, diffractive devices in beam handling, and intensity profiling UV laser beams. Other topics include optical fiber Nd-YAG laser beam delivery systems, a flexible fiber cable for 1 kW CW YAG laser radiation transmission, an optical fiber multiplexer for industrial Nd:YAG lasers, linking laser and handling systems in multistation operation, a noncontact capacitive control system for laser cutting machines, and robotics for beam manipulations. Additional subjects include active optics for high power lasers, beam delivery and shaping on heat treating applications, optics for shaping and focusing industrial CO2 lasers, reshaping annular laser beams with conical reflectors, increasing the flexibility of beam integrating multifaceted mirrors, and the definition and use of the principal planes for Gaussian beams.

  1. Computational Systems

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecoveryplanningCoalSocial media is a greatMaterials

  2. Computational Systems

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecoveryplanningCoalSocial media is a greatMaterials Edison

  3. Efficient measurement-based quantum computing with continuous-variable systems

    E-Print Network [OSTI]

    Matthias Ohliger; Jens Eisert

    2012-07-09

    We present strictly efficient schemes for scalable measurement-based quantum computing using continuous-variable systems: These schemes are based on suitable non-Gaussian resource states, ones that can be prepared using interactions of light with matter systems or even purely optically. Merely Gaussian measurements such as optical homodyning as well as photon counting measurements are required, on individual sites. These schemes overcome limitations posed by Gaussian cluster states, which are known not to be universal for quantum computations of unbounded length, unless one is willing to scale the degree of squeezing with the total system size. We establish a framework derived from tensor networks and matrix product states with infinite physical dimension and finite auxiliary dimension general enough to provide a framework for such schemes. Since in the discussed schemes the logical encoding is finite-dimensional, tools of error correction are applicable. We also identify some further limitations for any continuous-variable computing scheme from which one can argue that no substantially easier ways of continuous-variable measurement-based computing than the presented one can exist.

  4. Computer modeling of the spatial resolution properties of a dedicated breast CT system

    SciTech Connect (OSTI)

    Yang Kai; Kwan, Alexander L. C.; Boone, John M. [Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100 Ellison Building, Sacramento, California 95817 (United States) and Department of Biomedical Engineering, University of California, Davis, California, 95616 (United States); Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100 Ellison Building, Sacramento, California 95817 (United States); Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100 Ellison Building, Sacramento, California 95817 (United States) and Department of Biomedical Engineering, University of California, Davis, California 95616 (United States)

    2007-06-15

    Computer simulation methods were used to evaluate the spatial resolution properties of a dedicated cone-beam breast CT system. x-ray projection data of a 70 {mu}m nickel-chromium wire were simulated. The modulation transfer function (MTF) was calculated from the reconstructed axial images at different radial positions from the isocenter to study the spatial dependency of the spatial resolution of the breast CT scanner. The MTF was also calculated in both the radial and azimuthal directions. Subcomponents of the cone beam CT system that affect the MTF were modeled in the computer simulation in a serial manner, including the x-ray focal spot distribution, gantry rotation under the condition of continuous fluoroscopy, detector lag, and detector spatial resolution. Comparison between the computer simulated and physically measured MTF values demonstrates reasonable accuracy in the simulation process, with a small systematic difference ({approx}9.5{+-}6.4% difference, due to unavoidable uncertainties from physical measurement and system calibration). The intrinsic resolution in the radial direction determined by simulation was about 2.0 mm{sup -1} uniformly through the field of view. The intrinsic resolution in the azimuthal direction degrades from 2.0 mm{sup -1} at the isocenter to 1.0 mm{sup -1} at the periphery with 76.9 mm from the isocenter. The results elucidate the intrinsic spatial resolution properties of the prototype breast CT system, and suggest ways in which spatial resolution can be improved with system modification.

  5. SCALE: A modular code system for performing standardized computer analyses for licensing evaluation

    SciTech Connect (OSTI)

    1997-03-01

    This Manual represents Revision 5 of the user documentation for the modular code system referred to as SCALE. The history of the SCALE code system dates back to 1969 when the current Computational Physics and Engineering Division at Oak Ridge National Laboratory (ORNL) began providing the transportation package certification staff at the U.S. Atomic Energy Commission with computational support in the use of the new KENO code for performing criticality safety assessments with the statistical Monte Carlo method. From 1969 to 1976 the certification staff relied on the ORNL staff to assist them in the correct use of codes and data for criticality, shielding, and heat transfer analyses of transportation packages. However, the certification staff learned that, with only occasional use of the codes, it was difficult to become proficient in performing the calculations often needed for an independent safety review. Thus, shortly after the move of the certification staff to the U.S. Nuclear Regulatory Commission (NRC), the NRC staff proposed the development of an easy-to-use analysis system that provided the technical capabilities of the individual modules with which they were familiar. With this proposal, the concept of the Standardized Computer Analyses for Licensing Evaluation (SCALE) code system was born. This manual covers an array of modules written for the SCALE package, consisting of drivers, system libraries, cross section and materials properties libraries, input/output routines, storage modules, and help files.

  6. An automated system for lung nodule detection in low-dose computed tomography

    E-Print Network [OSTI]

    Gori, I; Martinez, A Preite; Retico, A

    2007-01-01

    A computer-aided detection (CAD) system for the identification of pulmonary nodules in low-dose multi-detector helical Computed Tomography (CT) images was developed in the framework of the MAGIC-5 Italian project. One of the main goals of this project is to build a distributed database of lung CT scans in order to enable automated image analysis through a data and cpu GRID infrastructure. The basic modules of our lung-CAD system, a dot-enhancement filter for nodule candidate selection and a neural classifier for false-positive finding reduction, are described. The system was designed and tested for both internal and sub-pleural nodules. The results obtained on the collected database of low-dose thin-slice CT scans are shown in terms of free response receiver operating characteristic (FROC) curves and discussed.

  7. Computational approaches to many-body dynamics of unstable nuclear systems

    E-Print Network [OSTI]

    Alexander Volya

    2014-12-19

    The goal of this presentation is to highlight various computational techniques used to study dynamics of quantum many-body systems. We examine the projection and variable phase methods being applied to multi-channel problems of scattering and tunneling; here the virtual, energy-forbidden channels and their treatment are of particular importance. The direct time-dependent solutions using Trotter-Suzuki propagator expansion provide yet another approach to exploring the complex dynamics of unstable systems. While presenting computational tools, we briefly revisit the general theory of the quantum decay of unstable states. The list of questions here includes those of the internal dynamics in decaying systems, formation and evolution of the radiating state, and low-energy background that dominates at remote times. Mathematical formulations and numerical approaches to time-dependent problems are discussed using the quasi-stationary methods involving effective Non-Hermitian Hamiltonian formulation.

  8. Switchover software reliability estimate for Paducah Freezer/Sublimer computer systems

    SciTech Connect (OSTI)

    Flanagan, D.M.; Davis, J.N.

    1993-04-01

    K-25 Engineering Division purchased a series of redundant computer systems and developed software for the purpose of providing continuous process monitoring and control for the Freezer/Sublimer equipment in the gaseous diffusion process at the Paducah Gaseous Diffusion Plant. The application software is loaded on two central processing units (CPU) so that in the event of a failure of the primary unit, the processing can switch to the backup unit and continue processing without error. It is the purpose of this document to demonstrate the reliability of this system with respect to its ability to switch properly between redundant CPU. The total reliability estimation problem -- which considers the computer hardware, the operating system software, and the application software -- has been reduced to one that considers only the application software directly involved in the switchover process. Estimates are provided for software reliability and the testing coverage. Software and hardware reliability models and reliability growth models are considered in addition to Bayesian approaches.

  9. Office of Inspector General report on audit of Southwestern Federal Power System combined financial statements and supplemental schedules (with independent auditors` reports thereon) for the years ended September 30, 1997 and 1996

    SciTech Connect (OSTI)

    NONE

    1998-10-06

    Southwestern Federal Power System (SWFPS) encompasses the operation of 24 hydroelectric power plants by the US Army Corps of Engineers and the marketing of power and energy from those plants by the Southwestern Power Administration (Southwestern) of the US Department of Energy. This report presents the results of the independent certified public accountants` audit of the SWFPS`s combined power system statements of assets, Federal investments and liabilities, and the related combined statements of revenues, expenses and accumulated net revenues, and cash flows.

  10. Department of Computer & Information Sciences University of Delaware 302-831-2712 www.cis.udel.edu information systems

    E-Print Network [OSTI]

    Gao, Guang R.

    Department of Computer & Information Sciences · University of Delaware · 302-831-2712 · www Sciences offers students a Bachelor of Science major in Information Systems (INSY-BS), which combines science. #12;SpringFall Information Systems Curriculum Department of Computer & Information Sciences

  11. Methods and apparatuses for information analysis on shared and distributed computing systems

    DOE Patents [OSTI]

    Bohn, Shawn J [Richland, WA; Krishnan, Manoj Kumar [Richland, WA; Cowley, Wendy E [Richland, WA; Nieplocha, Jarek [Richland, WA

    2011-02-22

    Apparatuses and computer-implemented methods for analyzing, on shared and distributed computing systems, information comprising one or more documents are disclosed according to some aspects. In one embodiment, information analysis can comprise distributing one or more distinct sets of documents among each of a plurality of processes, wherein each process performs operations on a distinct set of documents substantially in parallel with other processes. Operations by each process can further comprise computing term statistics for terms contained in each distinct set of documents, thereby generating a local set of term statistics for each distinct set of documents. Still further, operations by each process can comprise contributing the local sets of term statistics to a global set of term statistics, and participating in generating a major term set from an assigned portion of a global vocabulary.

  12. Finite Volume Based Computer Program for Ground Source Heat Pump System

    SciTech Connect (OSTI)

    Menart, James A.

    2013-02-22

    This report is a compilation of the work that has been done on the grant DE-EE0002805 entitled ?Finite Volume Based Computer Program for Ground Source Heat Pump Systems.? The goal of this project was to develop a detailed computer simulation tool for GSHP (ground source heat pump) heating and cooling systems. Two such tools were developed as part of this DOE (Department of Energy) grant; the first is a two-dimensional computer program called GEO2D and the second is a three-dimensional computer program called GEO3D. Both of these simulation tools provide an extensive array of results to the user. A unique aspect of both these simulation tools is the complete temperature profile information calculated and presented. Complete temperature profiles throughout the ground, casing, tube wall, and fluid are provided as a function of time. The fluid temperatures from and to the heat pump, as a function of time, are also provided. In addition to temperature information, detailed heat rate information at several locations as a function of time is determined. Heat rates between the heat pump and the building indoor environment, between the working fluid and the heat pump, and between the working fluid and the ground are computed. The heat rates between the ground and the working fluid are calculated as a function time and position along the ground loop. The heating and cooling loads of the building being fitted with a GSHP are determined with the computer program developed by DOE called ENERGYPLUS. Lastly COP (coefficient of performance) results as a function of time are provided. Both the two-dimensional and three-dimensional computer programs developed as part of this work are based upon a detailed finite volume solution of the energy equation for the ground and ground loop. Real heat pump characteristics are entered into the program and used to model the heat pump performance. Thus these computer tools simulate the coupled performance of the ground loop and the heat pump. The price paid for the three-dimensional detail is the large computational times required with GEO3D. The computational times required for GEO2D are reasonable, a few minutes for a 20 year simulation. For a similar simulation, GEO3D takes days of computational time. Because of the small simulation times with GEO2D, a number of attractive features have been added to it. GEO2D has a user friendly interface where inputs and outputs are all handled with GUI (graphical user interface) screens. These GUI screens make the program exceptionally easy to use. To make the program even easier to use a number of standard input options for the most common GSHP situations are provided to the user. For the expert user, the option still exists to enter their own detailed information. To further help designers and GSHP customers make decisions about a GSHP heating and cooling system, cost estimates are made by the program. These cost estimates include a payback period graph to show the user where their GSHP system pays for itself. These GSHP simulation tools should be a benefit to the advancement of GSHP systems.

  13. Recovery Act: Finite Volume Based Computer Program for Ground Source Heat Pump Systems

    SciTech Connect (OSTI)

    James A Menart, Professor

    2013-02-22

    This report is a compilation of the work that has been done on the grant DE-EE0002805 entitled ���¢��������Finite Volume Based Computer Program for Ground Source Heat Pump Systems.���¢������� The goal of this project was to develop a detailed computer simulation tool for GSHP (ground source heat pump) heating and cooling systems. Two such tools were developed as part of this DOE (Department of Energy) grant; the first is a two-dimensional computer program called GEO2D and the second is a three-dimensional computer program called GEO3D. Both of these simulation tools provide an extensive array of results to the user. A unique aspect of both these simulation tools is the complete temperature profile information calculated and presented. Complete temperature profiles throughout the ground, casing, tube wall, and fluid are provided as a function of time. The fluid temperatures from and to the heat pump, as a function of time, are also provided. In addition to temperature information, detailed heat rate information at several locations as a function of time is determined. Heat rates between the heat pump and the building indoor environment, between the working fluid and the heat pump, and between the working fluid and the ground are computed. The heat rates between the ground and the working fluid are calculated as a function time and position along the ground loop. The heating and cooling loads of the building being fitted with a GSHP are determined with the computer program developed by DOE called ENERGYPLUS. Lastly COP (coefficient of performance) results as a function of time are provided. Both the two-dimensional and three-dimensional computer programs developed as part of this work are based upon a detailed finite volume solution of the energy equation for the ground and ground loop. Real heat pump characteristics are entered into the program and used to model the heat pump performance. Thus these computer tools simulate the coupled performance of the ground loop and the heat pump. The price paid for the three-dimensional detail is the large computational times required with GEO3D. The computational times required for GEO2D are reasonable, a few minutes for a 20 year simulation. For a similar simulation, GEO3D takes days of computational time. Because of the small simulation times with GEO2D, a number of attractive features have been added to it. GEO2D has a user friendly interface where inputs and outputs are all handled with GUI (graphical user interface) screens. These GUI screens make the program exceptionally easy to use. To make the program even easier to use a number of standard input options for the most common GSHP situations are provided to the user. For the expert user, the option still exists to enter their own detailed information. To further help designers and GSHP customers make decisions about a GSHP heating and cooling system, cost estimates are made by the program. These cost estimates include a payback period graph to show the user where their GSHP system pays for itself. These GSHP simulation tools should be a benefit to the advancement of GSHP system

  14. System Software and Tools for High Performance Computing Environments: A report on the findings of the Pasadena Workshop, April 14--16, 1992

    SciTech Connect (OSTI)

    Sterling, T. [Universities Space Research Association, Washington, DC (United States); Messina, P. [Jet Propulsion Lab., Pasadena, CA (United States); Chen, M. [Yale Univ., New Haven, CT (United States)] [and others

    1993-04-01

    The Pasadena Workshop on System Software and Tools for High Performance Computing Environments was held at the Jet Propulsion Laboratory from April 14 through April 16, 1992. The workshop was sponsored by a number of Federal agencies committed to the advancement of high performance computing (HPC) both as a means to advance their respective missions and as a national resource to enhance American productivity and competitiveness. Over a hundred experts in related fields from industry, academia, and government were invited to participate in this effort to assess the current status of software technology in support of HPC systems. The overall objectives of the workshop were to understand the requirements and current limitations of HPC software technology and to contribute to a basis for establishing new directions in research and development for software technology in HPC environments. This report includes reports written by the participants of the workshop`s seven working groups. Materials presented at the workshop are reproduced in appendices. Additional chapters summarize the findings and analyze their implications for future directions in HPC software technology development.

  15. NIST Computer Security Division csrc.nist.gov Summary of NIST SP 800-53 Revision 4,

    E-Print Network [OSTI]

    , the Intelligence Community, the Committee on National Security Systems, the Department of Homeland Security, and UNIST Computer Security Division csrc.nist.gov Summary of NIST SP 800-53 Revision 4, Security and Privacy Controls for Federal Information Systems and Organizations Kelley Dempsey Computer Security

  16. Federal Estate Taxation 

    E-Print Network [OSTI]

    McEowen, Roger A.

    1999-06-23

    The federal estate tax is an excise tax levied on the privilege of transferring property at death. This publication discusses the important issues relevant to understanding estate taxes, such as when and how property is valued for federal estate tax...

  17. Selection and implementation of a computer aided design and drafting (CAD/D) system

    SciTech Connect (OSTI)

    Davis, J.P.

    1981-01-01

    Faced with very heavy workloads and limited engineering and graphics personnel, Transco opted for a computer-aided design and drafting system that can produce intelligent drawings, which have associated data bases that can be integrated with other graphical and nongraphical data bases to form comprehensive sets of data for construction projects. Because so much time was being spent in all phases of materials and inventory control, Transco decided to integrate materials-management capabilities into the CAD/D system. When a specific item of material is requested on the graphics equipment, the request triggers production of both the drawing and a materials list. Transco plans to extend its computer applications into mapping tasks as well.

  18. Evaluation of Potential Locations for Siting Small Modular Reactors near Federal Energy Clusters to Support Federal Clean Energy Goals

    SciTech Connect (OSTI)

    Belles, Randy J.; Omitaomu, Olufemi A.

    2014-09-01

    Geographic information systems (GIS) technology was applied to analyze federal energy demand across the contiguous US. Several federal energy clusters were previously identified, including Hampton Roads, Virginia, which was subsequently studied in detail. This study provides an analysis of three additional diverse federal energy clusters. The analysis shows that there are potential sites in various federal energy clusters that could be evaluated further for placement of an integral pressurized-water reactor (iPWR) to support meeting federal clean energy goals.

  19. PAD, a computer-aided molecular model building system utilizing two-dimensional graphical input 

    E-Print Network [OSTI]

    White, William Gerald

    1980-01-01

    and an artist. CONTENTS CHAPTER I. BACKGROUND: INTERFACING COMPUTER AND CHEMIcT Graphical Input Hardware Evolution. . . . . Software Systems: Using the Hardware, , Chemical Applications. Program PAD xn Perspective. CHAPTER II. YATERIA' S AND METHODS... are used. The 2-D coordinates of each atom input by the user are stored permanently in XS and YS, after temporary storage in IX and IY. Arrays XS and YS are each 99 elements long, as are all other arrays storing information about input atoms; therefore...

  20. Computational Approach to Gravitational Waves Forms in Stellar Systems as Complex Structures through Keplerian Parameters

    E-Print Network [OSTI]

    Ivana Bochicchio; Mariafelicia De Laurentis; Ettore Laserra

    2009-06-26

    In this paper we investigate the gravitational waves emission by stellar dynamical structures as complex systems in the quadrupole approximation considering bounded and unbounded orbits. Precisely, after deriving analytical expressions for the gravitational wave luminosity, the total energy output and gravitational radiation amplitude, we present a computational approach to evaluate the gravitational wave-forms from elliptical, circular, parabolic and hyperbolic orbits as a function of Keplerian parameters.

  1. Cyberinfrastructure: Computing,NetworkingandSupportforResearch

    E-Print Network [OSTI]

    Finley Jr., Russell L.

    computing systems WSU's High Performance Computing (HPC) Grid for research and courses in parallel computing

  2. Federal Employee Training Manual

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

    1999-09-21

    This Manual provides detailed requirements to supplement DOE O 360.1A, Federal Employee Training, dated 9-21-99. The information in this Manual is intended to assist in improving Federal workforce performance under Department of Energy (DOE) managed Federal employee training. Canceled by DOE M 360.1-1B.

  3. Federal Employee Training Manual

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

    2001-10-11

    This Manual provides detailed requirements to supplement DOE O 360.1B, FEDERAL EMPLOYEE TRAINING. The information in this Manual is intended to assist in improving Federal workforce performance under Department of Energy (DOE) managed Federal employee training. Cancels DOE M 360.1A-1. Canceled by DOE O 360.1C.

  4. Data Management for Earth System Science Institute for Computational Earth System Science

    E-Print Network [OSTI]

    Dozier, Jeff

    imaging sensors on Earth-orbiting satellites, we find they have already populated several multi- terabyte- age on a daily or weekly basis. The advent of the advanced sensors on the Earth Observing System (EOS by some complex and incomplete encoding of semantic metadata into a file name. Most Earth system science c

  5. Computing stationary distributions in equilibrium and non-equilibrium systems with Forward Flux Sampling

    E-Print Network [OSTI]

    Chantal Valeriani; Rosalind J. Allen; Marco J. Morelli; Daan Frenkel; Pieter Rein ten Wolde

    2009-07-03

    We present a method for computing stationary distributions for activated processes in equilibrium and non-equilibrium systems using Forward Flux Sampling (FFS). In this method, the stationary distributions are obtained directly from the rate constant calculations for the forward and backward reactions; there is no need to perform separate calculations for the stationary distribution and the rate constant. We apply the method to the non-equilibrium rare event problem proposed by Maier and Stein, to nucleation in a 2-dimensional Ising system, and to the flipping of a genetic switch.

  6. Federal Participation in LEED in 2005

    SciTech Connect (OSTI)

    Payne, Christopher; Dyer, Beverly

    2005-11-01

    The federal government is an active participant in promotingsustainable design, construction and operations and in the use of USGBC'sLeadership in Energy and Environmental Design (LEED) Green BuildingRating System. This paper presents an overview of sustainableconstruction activities in the federal sector in 2005.

  7. Federal Acquisition Regulation; Federal Acquisition Circular...

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

    2005-37; Introduction Federal Acquisition Circular (FAC) 2005-37 List of Rules in FAC 2005-37 Item Subject I. Registry of Disaster Response Contractors II. Limiting Length of...

  8. Outcome 3. Graduates will be proficient in the use of computers, recent computer software, and computer-based information systems. This outcome maps to ABET Criterion 3 k

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    -based information systems such as the world wide web, thermodynamics data packages, and information systems found

  9. A High Performance Computing Network and System Simulator for the Power Grid: NGNS^2

    SciTech Connect (OSTI)

    Villa, Oreste; Tumeo, Antonino; Ciraci, Selim; Daily, Jeffrey A.; Fuller, Jason C.

    2012-11-11

    Designing and planing next generation power grid sys- tems composed of large power distribution networks, monitoring and control networks, autonomous generators and consumers of power requires advanced simulation infrastructures. The objective is to predict and analyze in time the behavior of networks of systems for unexpected events such as loss of connectivity, malicious attacks and power loss scenarios. This ultimately allows one to answer questions such as: “What could happen to the power grid if ...”. We want to be able to answer as many questions as possible in the shortest possible time for the largest possible systems. In this paper we present a new High Performance Computing (HPC) oriented simulation infrastructure named Next Generation Network and System Simulator (NGNS2 ). NGNS2 allows for the distribution of a single simulation among multiple computing elements by using MPI and OpenMP threads. NGNS2 provides extensive configuration, fault tolerant and load balancing capabilities needed to simulate large and dynamic systems for long periods of time. We show the preliminary results of the simulator running approximately two million simulated entities both on a 64-node commodity Infiniband cluster and a 48-core SMP workstation.

  10. Introduction to Redberry: a computer algebra system designed for tensor manipulation

    E-Print Network [OSTI]

    D. A. Bolotin; S. V. Poslavsky

    2015-01-06

    In this paper we introduce Redberry --- an open source computer algebra system with native support of tensorial expressions. It provides basic computer algebra tools (algebraic manipulations, substitutions, basic simplifications etc.) which are aware of specific features of indexed expressions: contractions of indices, permutational symmetries, multiple index types etc. Redberry supports conventional \\LaTeX-style input notation for tensorial expressions. The high energy physics package includes tools for Feynman diagrams calculation: Dirac and SU(N) algebra, Levi-Civita simplifications and tools for one-loop calculations in quantum field theory. In the paper we give detailed overview of Redberry features: from basic manipulations with tensors to real Feynman diagrams calculation, accompanied by many examples. Redberry is written in Java 7 and provides convenient Groovy-based user interface inside the high-level general purpose programming language environment. Redberry is available from http://redberry.cc

  11. Calculating a checksum with inactive networking components in a computing system

    DOE Patents [OSTI]

    Aho, Michael E; Chen, Dong; Eisley, Noel A; Gooding, Thomas M; Heidelberger, Philip; Tauferner, Andrew T

    2014-12-16

    Calculating a checksum utilizing inactive networking components in a computing system, including: identifying, by a checksum distribution manager, an inactive networking component, wherein the inactive networking component includes a checksum calculation engine for computing a checksum; sending, to the inactive networking component by the checksum distribution manager, metadata describing a block of data to be transmitted by an active networking component; calculating, by the inactive networking component, a checksum for the block of data; transmitting, to the checksum distribution manager from the inactive networking component, the checksum for the block of data; and sending, by the active networking component, a data communications message that includes the block of data and the checksum for the block of data.

  12. A Computational Study on Emotions and Temperament in Multi-Agent Systems

    E-Print Network [OSTI]

    Reis, Luis Paulo; Lau, Nuno

    2008-01-01

    Recent advances in neurosciences and psychology have provided evidence that affective phenomena pervade intelligence at many levels, being inseparable from the cognitionaction loop. Perception, attention, memory, learning, decisionmaking, adaptation, communication and social interaction are some of the aspects influenced by them. This work draws its inspirations from neurobiology, psychophysics and sociology to approach the problem of building autonomous robots capable of interacting with each other and building strategies based on temperamental decision mechanism. Modelling emotions is a relatively recent focus in artificial intelligence and cognitive modelling. Such models can ideally inform our understanding of human behavior. We may see the development of computational models of emotion as a core research focus that will facilitate advances in the large array of computational systems that model, interpret or influence human behavior. We propose a model based on a scalable, flexible and modular approach to...

  13. Computer-implemented security evaluation methods, security evaluation systems, and articles of manufacture

    DOE Patents [OSTI]

    Muller, George; Perkins, Casey J.; Lancaster, Mary J.; MacDonald, Douglas G.; Clements, Samuel L.; Hutton, William J.; Patrick, Scott W.; Key, Bradley Robert

    2015-07-28

    Computer-implemented security evaluation methods, security evaluation systems, and articles of manufacture are described. According to one aspect, a computer-implemented security evaluation method includes accessing information regarding a physical architecture and a cyber architecture of a facility, building a model of the facility comprising a plurality of physical areas of the physical architecture, a plurality of cyber areas of the cyber architecture, and a plurality of pathways between the physical areas and the cyber areas, identifying a target within the facility, executing the model a plurality of times to simulate a plurality of attacks against the target by an adversary traversing at least one of the areas in the physical domain and at least one of the areas in the cyber domain, and using results of the executing, providing information regarding a security risk of the facility with respect to the target.

  14. A novel computer-aided lung nodule detection system for CT images

    SciTech Connect (OSTI)

    Tan, Maxine; Deklerck, Rudi; Jansen, Bart; Bister, Michel; Cornelis, Jan [Department of Electronics and Informatics (ETRO), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel (Belgium); Department of Electronics and Informatics (ETRO), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium and Interdisciplinary Institute for Broadband Technology (IBBT), Gaston Crommenlaan 8, 9050 Gent (Belgium); Department of Electronics and Informatics (ETRO), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel (Belgium)

    2011-10-15

    Purpose: The paper presents a complete computer-aided detection (CAD) system for the detection of lung nodules in computed tomography images. A new mixed feature selection and classification methodology is applied for the first time on a difficult medical image analysis problem. Methods: The CAD system was trained and tested on images from the publicly available Lung Image Database Consortium (LIDC) on the National Cancer Institute website. The detection stage of the system consists of a nodule segmentation method based on nodule and vessel enhancement filters and a computed divergence feature to locate the centers of the nodule clusters. In the subsequent classification stage, invariant features, defined on a gauge coordinates system, are used to differentiate between real nodules and some forms of blood vessels that are easily generating false positive detections. The performance of the novel feature-selective classifier based on genetic algorithms and artificial neural networks (ANNs) is compared with that of two other established classifiers, namely, support vector machines (SVMs) and fixed-topology neural networks. A set of 235 randomly selected cases from the LIDC database was used to train the CAD system. The system has been tested on 125 independent cases from the LIDC database. Results: The overall performance of the fixed-topology ANN classifier slightly exceeds that of the other classifiers, provided the number of internal ANN nodes is chosen well. Making educated guesses about the number of internal ANN nodes is not needed in the new feature-selective classifier, and therefore this classifier remains interesting due to its flexibility and adaptability to the complexity of the classification problem to be solved. Our fixed-topology ANN classifier with 11 hidden nodes reaches a detection sensitivity of 87.5% with an average of four false positives per scan, for nodules with diameter greater than or equal to 3 mm. Analysis of the false positive items reveals that a considerable proportion (18%) of them are smaller nodules, less than 3 mm in diameter. Conclusions: A complete CAD system incorporating novel features is presented, and its performance with three separate classifiers is compared and analyzed. The overall performance of our CAD system equipped with any of the three classifiers is well with respect to other methods described in literature.

  15. May 22, 2008 Symmetric Active/Active High Availability for High-Performance Computing System Services: Accomplishments and Limitations

    E-Print Network [OSTI]

    Engelmann, Christian

    May 22, 2008 Symmetric Active/Active High Availability for High-Performance Computing System Services: Accomplishments and Limitations 1/31 Symmetric Active/Active High Availability for High, Cookeville, USA #12;May 22, 2008 Symmetric Active/Active High Availability for High-Performance Computing

  16. An Analysis Framework for Investigating the Trade-offs Between System Performance and Energy Consumption in a Heterogeneous Computing Environment

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    An Analysis Framework for Investigating the Trade-offs Between System Performance and Energy that will allow a system administrator to investigate the trade- offs between system energy consumption be useful to examine the trade-offs between minimizing energy consumption and maximizing computing

  17. Computing Accumulated Delays in Realtime Systems \\Lambda Rajeev Alur y Costas Courcoubetis z Thomas A. Henzinger x

    E-Print Network [OSTI]

    Alur, Rajeev

    as a powerful tool for the automatic verification of finite­state systems. Recently the model­checking paradigm properties of real­time systems. Here we address the algorithmic verification problem for duration propertiesComputing Accumulated Delays in Real­time Systems \\Lambda Rajeev Alur y Costas Courcoubetis z

  18. 7.91J / 7.36J / 20.490J Foundations of Computational and Systems Biology, Spring 2004

    E-Print Network [OSTI]

    Burge, Christopher

    Serving as an introduction to computational biology, this course emphasizes the fundamentals of nucleic acid and protein sequence analysis, structural analysis, and the analysis of complex biological systems. The principles ...

  19. Future Generation Computer Systems 29 (2013) 472487 Contents lists available at SciVerse ScienceDirect

    E-Print Network [OSTI]

    Sakellariou, Rizos

    2013-01-01

    Future Generation Computer Systems 29 (2013) 472­487 Contents lists available at SciVerse Science or water [1]. For the underlying infrastructure this means that it has to deal with dynamic load changes

  20. Preclusion in a Federal System

    E-Print Network [OSTI]

    Casad, Robert C.

    1984-01-01

    HeinOnline -- 70 Cornell L. Rev. 599 1984-1985 HeinOnline -- 70 Cornell L. Rev. 600 1984-1985 HeinOnline -- 70 Cornell L. Rev. 601 1984-1985 HeinOnline -- 70 Cornell L. Rev. 602 1984-1985 ...HeinOnline -- 70 Cornell L. Rev. 599 1984-1985 HeinOnline -- 70 Cornell L. Rev. 600 1984-1985 HeinOnline -- 70 Cornell L. Rev. 601 1984-1985 HeinOnline -- 70 Cornell L. Rev. 602 1984-1985 ...