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Note: This page contains sample records for the topic "distributed computing group" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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1

Computing Frontier: Distributed Computing  

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

Computing Computing Frontier: Distributed Computing and Facility Infrastructures Conveners: Kenneth Bloom 1 , Richard Gerber 2 1 Department of Physics and Astronomy, University of Nebraska-Lincoln 2 National Energy Research Scientific Computing Center (NERSC), Lawrence Berkeley National Laboratory 1.1 Introduction The field of particle physics has become increasingly reliant on large-scale computing resources to address the challenges of analyzing large datasets, completing specialized computations and simulations, and allowing for wide-spread participation of large groups of researchers. For a variety of reasons, these resources have become more distributed over a large geographic area, and some resources are highly specialized computing machines. In this report for the Snowmass Computing Frontier Study, we consider several questions about distributed computing

2

Coping with distributed computing  

SciTech Connect

The rapid increase in the availability of high performance, cost-effective RISC/UNIX workstations has been both a blessing and a curse. The blessing of having extremely powerful computing engines available on the desk top is well-known to many users. The user has tremendous freedom, flexibility, and control of his environment. That freedom can, however, become the curse of distributed computing. The user must become a system manager to some extent, he must worry about backups, maintenance, upgrades, etc. Traditionally these activities have been the responsibility of a central computing group. The central computing group, however, may find that it can no longer provide all of the traditional services. With the plethora of workstations now found on so many desktops throughout the entire campus or lab, the central computing group may be swamped by support requests. This talk will address several of these computer support and management issues by providing some examples of the approaches taken at various HEP institutions. In addition, a brief review of commercial directions or products for distributed computing and management will be given.

Cormell, L.

1992-09-01T23:59:59.000Z

3

Computer Integrated Building Processes Group  

Science Conference Proceedings (OSTI)

... Laboratory effective in October 2011, the Computer Integrated Building Processes Group ... Chris Brown) are now in the Systems Integration Division. ...

2013-07-12T23:59:59.000Z

4

High Performance Computing and Visualization Group ...  

Science Conference Proceedings (OSTI)

High Performance Computing and Visualization Group. Welcome. The High Performance Computing and Visualization Group. ...

2011-09-27T23:59:59.000Z

5

Distributed computing at the SSCL  

SciTech Connect

The rapid increase in the availability of high performance, cost- effective RISC/UNIX workstations has been both a blessing and a curse. The blessing of having extremely powerful computing engines available on the desk top is well-known to many users. The user has tremendous freedom, flexibility, and control of his environment. That freedom can, however, become the curse of distributed computing. The user must become a system manager to some extent, he must worry about backups, maintenance, upgrades, etc. Traditionally these activities have been the responsibility of a central computing group. The central computing group, however, may find that it can no linger provide all of the traditional services. With the plethora of workstations now found on so many desktops throughout the entire campus or lab, the central computing group may be swamped by support requests. This talk will address several of these computer support and management issues by discussing the approach taken at the Superconducting Super Collider Laboratory. In addition, a brief review of the future directions of commercial products for distributed computing and management will be given.

Cormell, L.; White, R.

1993-05-01T23:59:59.000Z

6

Distributed Anonymous Discrete Function Computation  

E-Print Network (OSTI)

We propose a model for deterministic distributed function computation by a network of identical and anonymous nodes. In this model, each node has bounded computation and storage capabilities that do not grow with the network ...

Tsitsiklis, John N.

7

Computer Graphics Group Leif KobbeltAACHEN  

E-Print Network (OSTI)

Computer Graphics Group Leif KobbeltAACHEN Computer Graphics Leif Kobbelt Computer Graphics Group Leif KobbeltAACHEN Public Perception of CG · Games · Movies Computer Graphics Group Leif KobbeltAACHEN Computer Graphics Research · fundamental algorithms & data structures - continuous & discrete mathematics

Kobbelt, Leif

8

NERSC seeks Computational Systems Group Lead  

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

seeks Computational Systems Group Lead seeks Computational Systems Group Lead NERSC seeks Computational Systems Group Lead January 6, 2011 by Katie Antypas Note: This position is now closed. The Computational Systems Group provides production support and advanced development for the supercomputer systems at NERSC. Manage the Computational Systems Group (CSG) which provides production support and advanced development for the supercomputer systems at NERSC (National Energy Research Scientific Computing Center). These systems, which include the second fastest supercomputer in the U.S., provide 24x7 computational services for open (unclassified) science to world-wide researchers supported by DOE's Office of Science. Duties/Responsibilities Manage the Computational Systems Group's staff of approximately 10

9

Architecture of the Entropia Distributed Computing System  

Science Conference Proceedings (OSTI)

Distributed Computing, the exploitation of idle cycles on pervasive desktop PC systems offers the opportunity to increase the available computing power by orders of magnitude (10x - 1000x). However, for desktop PC distributed computing ...

Andrew A. Chien

2002-04-01T23:59:59.000Z

10

A Distributed Data-Storage Service for Supporting Group Collaborations  

E-Print Network (OSTI)

. Shackelford John B. Smith F. Don Smith The University of North Carolina at Chapel Hill Department of Computer;A Distributed Data-Storage Service for Supporting Group Collaborations Douglas E. Shackelford F. Don

North Carolina at Chapel Hill, University of

11

Dynamic Links and Distributed Computing - CECM  

E-Print Network (OSTI)

Dynamic Links and Distributed Computing ... Next: Advanced Collaboration via Up: InternetExecutable Content, Previous: The Third-Generation Internet...

12

Overlapping clusters for distributed computation.  

SciTech Connect

Scalable, distributed algorithms must address communication problems. We investigate overlapping clusters, or vertex partitions that intersect, for graph computations. This setup stores more of the graph than required but then affords the ease of implementation of vertex partitioned algorithms. Our hope is that this technique allows us to reduce communication in a computation on a distributed graph. The motivation above draws on recent work in communication avoiding algorithms. Mohiyuddin et al. (SC09) design a matrix-powers kernel that gives rise to an overlapping partition. Fritzsche et al. (CSC2009) develop an overlapping clustering for a Schwarz method. Both techniques extend an initial partitioning with overlap. Our procedure generates overlap directly. Indeed, Schwarz methods are commonly used to capitalize on overlap. Elsewhere, overlapping communities (Ahn et al, Nature 2009; Mishra et al. WAW2007) are now a popular model of structure in social networks. These have long been studied in statistics (Cole and Wishart, CompJ 1970). We present two types of results: (i) an estimated swapping probability {rho}{infinity}; and (ii) the communication volume of a parallel PageRank solution (link-following {alpha} = 0.85) using an additive Schwarz method. The volume ratio is the amount of extra storage for the overlap (2 means we store the graph twice). Below, as the ratio increases, the swapping probability and PageRank communication volume decreases.

Mirrokni, Vahab (Google Research, New York, NY); Andersen, Reid (Microsoft Corporation, Redmond, WA); Gleich, David F.

2010-11-01T23:59:59.000Z

13

Distributed Energy Systems Integration Group (Fact Sheet)  

Science Conference Proceedings (OSTI)

Factsheet developed to describe the activites of the Distributed Energy Systems Integration Group within NREL's Electricity, Resources, and Buildings Systems Integration center.

Not Available

2009-10-01T23:59:59.000Z

14

Computer Networking Group | Stanford Synchrotron Radiation Lightsource  

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

Networking Group Networking Group Do you need help? For assistance please submit a CNG Help Request ticket. CNG Logo Chris Ramirez SSRL Computer and Networking Group Manager (650) 926-2901 | email Jerry Camuso SSRL Computer and Networking (650) 926-2994 | email Networking Support The Networking group provides connectivity and communications services for SSRL. The services provided by the Networking Support Group include: Local Area Network support for cable and wireless connectivity. Installation and maintenance of network printers and queues. Telephony installations and support. Printing Support The Networking group provides printer maintenance and support for SSRL Beamline Printers and plotters. The following models are supported: HP - Designjet large format plotters HP - Color and B/W Laserjet, Inkjet, Deskjet, Officejet

15

A Comparison of Conventional Distributed Computing Environments and Computational Grids  

Science Conference Proceedings (OSTI)

In recent years novel distributed computing environments termed grids have emerged. Superficially, grids are considered successors to, and more sophisticated and powerful versions of, conventional distributed environments. This paper investigates the ...

Zsolt Nmeth; Vaidy S. Sunderam

2002-04-01T23:59:59.000Z

16

A security model for distributed computing  

Science Conference Proceedings (OSTI)

This paper presents a multi-tier model for secure computing as a teaching method platform. The security model is based on establishing the trustworthiness and role of each component in a distributed computing environment: trusted users, trusted servers, ...

Iliya K. Georgiev; Ivo I. Georgiev

2001-10-01T23:59:59.000Z

17

Computing while charging: building a distributed computing infrastructure using smartphones  

Science Conference Proceedings (OSTI)

Every night, a large number of idle smartphones are plugged into a power source for recharging the battery. Given the increasing computing capabilities of smartphones, these idle phones constitute a sizeable computing infrastructure. Therefore, for an ... Keywords: distributed computing, scheduling, smartphone

Mustafa Y. Arslan; Indrajeet Singh; Shailendra Singh; Harsha V. Madhyastha; Karthikeyan Sundaresan; Srikanth V. Krishnamurthy

2012-12-01T23:59:59.000Z

18

Communication and Computation in Distributed CSP Algorithms  

E-Print Network (OSTI)

Communication and Computation in Distributed CSP Algorithms C`esar Fern`andez1 , Ram´on B´ejar1 in the context of networked distributed systems. In order to study the performance of Distributed CSP (DisCSP consider two complete DisCSP algorithms: asynchronous backtracking (ABT) and asynchronous weak commitment

Krishnamachari, Bhaskar

19

Embodied emergence : distributed computing manipulatives  

E-Print Network (OSTI)

Distributed systems and the emergent properties that can arise out of simple localized interactions have fascinated scientists and artists alike for the last century. They challenge the notions of control and creativity, ...

Bouchard, David, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

20

Experiences with distributed computation of twin primes distribution  

Science Conference Proceedings (OSTI)

This paper outlines experiences with development of a distributed framework designed for parallel processing of an application using idle processor time on large numbers of heterogeneous computers. The system places no requirements on the performance ...

Patrick H. Fry; Jeffrey Nesheiwat; Boleslaw K. Szymanski

2001-01-01T23:59:59.000Z

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


21

PRACE DECI (distributed european computing initiative) minisymposium  

Science Conference Proceedings (OSTI)

This article gives an overview of the DECI (Distributed European Computing Initiative) Minisymposium held within the PARA 2012 conference taking the form of a short set of articles for each of the talks presented. The work presented here was carried ...

Chris Johnson; Adam Carter; Iain Bethune; Kevin Statford; Mikko Alava; Vitor Cardoso; Muhammad Asif; Bernhard S.A. Schuberth; Tobias Weinzierl

2012-06-01T23:59:59.000Z

22

ATLAS distributed computing: experience and evolution  

E-Print Network (OSTI)

The ATLAS experiment has just concluded its first running period which commenced in 2010. After two years of remarkable performance from the LHC and ATLAS, the experiment has accumulated more than 25/fb of data. The total volume of beam and simulated data products exceeds 100~PB distributed across more than 150 computing centres around the world, managed by the experiment's distributed data management system. These sites have provided up to 150,000 computing cores to ATLAS's global production and analysis processing system, enabling a rich physics programme including the discovery of the Higgs-like boson in 2012. The wealth of accumulated experience in global data-intensive computing at this massive scale, and the considerably more challenging requirements of LHC computing from 2015 when the LHC resumes operation, are driving a comprehensive design and development cycle to prepare a revised computing model together with data processing and management systems able to meet the demands of higher trigger rates, e...

Nairz, A; The ATLAS collaboration

2013-01-01T23:59:59.000Z

23

Distributed computing environment in the ESnet Community  

Science Conference Proceedings (OSTI)

The Energy Sciences Network (ESnet) Community is undertaking an ambitious project to coordinate its distributed computing. A reasonable question is: ''Why Coordinate Distributed Computing?'' Without a coordinating element, the number of links for communicating between a number of nodes would grow with order N {sup 2}. Inserting an effective coordinating principle can reduce the number of independently managed links to order N while still leaving all of the links available for actual communications. A good example from telecommunications is the public phone system where one relies on central coordination of the phone numbers rather than having to personally negotiate the switching information with everyone with whom one wishes to communicate. The Internet's distributed system of name servers is another good example. The meta-question to the first question is: ''Why use distributed computing?'' The answer can be put in three parts: Individual end users require access to far more information and computational resources than they can acquire locally. For some applications, distributed computers are nearly as efficient as centralized computers and the total CPU resources available may be significant. Many resources are unique. They cannot easily be replicated. Some examples in the DOE community include research accelerators, fusion facilities, systems of virtual caves, and environmental laboratories. The overall response to the questions can be summarized in the concept of virtual laboratories. Humans want their resources responding within a second and at arm's length or closer. Using coordinated distributed computing, these requirements can be met by placing facilities on-line via Internet style technologies. Further, human communication is 10% verbal, 40% audio and 50% physiological. Using combinations of words, sounds and pictures including animation, virtual laboratory technologies can exploit all of these aspects of human communication. The human end user receives the benefit of virtual presence at on-line facilities and makes use of a rich collection of resources.

R. Roy Whitney

1995-10-01T23:59:59.000Z

24

An Infrastructure for Distributed Computing and Context Aware Computing  

E-Print Network (OSTI)

This paper focuses what we see as main issues in context awareness, small size and low power of today's mobile computing devices. Until now, these devices are heterogenous and mostly used standalone to accomplish certain task. That means there is no a single generic type device and user needs to be aware of different devices to perform different tasks, which is of course practically inconvenient. We propose a generic device and a network infrastructure which address low power consumption, context aware computing and protable device for the ubiquitous computing environment. Where the generic device (as a mobile device) interacts with the different distributed devices which are fixed in the physical infrastructure.

Sujan Pandey; Sujan P; Peter Zipf; Oliver Soffke; Mihail Petrov; Tudor Murgan; Max Mhlhuser; Manfred Glesner

2003-01-01T23:59:59.000Z

25

Utility Wind Integration Group Distributed Wind/Solar Interconnection...  

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

Utility Wind Integration Group Distributed WindSolar Interconnection Workshop Utility Wind Integration Group Distributed WindSolar Interconnection Workshop May 21, 2013 8:00AM...

26

Group theory (symmetries) in a computer game  

Science Conference Proceedings (OSTI)

Computer games can lay early seeds of mathematical concepts in children. The game discussed here is a computer puzzle that allows the movement of pieces through exchanges as well as in-place rotations of 180 about the x

Tarun Biswas

1998-01-01T23:59:59.000Z

27

Computational social dynamic modeling of group recruitment.  

SciTech Connect

The Seldon software toolkit combines concepts from agent-based modeling and social science to create a computationally social dynamic model for group recruitment. The underlying recruitment model is based on a unique three-level hybrid agent-based architecture that contains simple agents (level one), abstract agents (level two), and cognitive agents (level three). This uniqueness of this architecture begins with abstract agents that permit the model to include social concepts (gang) or institutional concepts (school) into a typical software simulation environment. The future addition of cognitive agents to the recruitment model will provide a unique entity that does not exist in any agent-based modeling toolkits to date. We use social networks to provide an integrated mesh within and between the different levels. This Java based toolkit is used to analyze different social concepts based on initialization input from the user. The input alters a set of parameters used to influence the values associated with the simple agents, abstract agents, and the interactions (simple agent-simple agent or simple agent-abstract agent) between these entities. The results of phase-1 Seldon toolkit provide insight into how certain social concepts apply to different scenario development for inner city gang recruitment.

Berry, Nina M.; Lee, Marinna; Pickett, Marc; Turnley, Jessica Glicken (Sandia National Laboratories, Albuquerque, NM); Smrcka, Julianne D. (Sandia National Laboratories, Albuquerque, NM); Ko, Teresa H.; Moy, Timothy David (Sandia National Laboratories, Albuquerque, NM); Wu, Benjamin C.

2004-01-01T23:59:59.000Z

28

Alexandru Iosup Parallel and Distributed Systems Group  

E-Print Network (OSTI)

Online Games: High Performance Computing and High Quality Time 1 Massivizing Social Games: High used to be art, may now be computing Massivizing Social Games: High Performance Computing and High,000,000 active players Massivizing Social Games: High Performance Computing and High Quality Time ­ A. Iosup 3

Iosup, Alexandru

29

Alexandru Iosup Parallel and Distributed Systems Group  

E-Print Network (OSTI)

Online Games: High Performance Computing and High Quality Time 1 Massivizing Social Games: High,000,000 active players Massivizing Social Games: High Performance Computing and High Quality Time ­ A. Iosup 3 Games: High Performance Computing and High Quality Time ­ A. Iosup 4 Sources: MMOGChart, own research

Iosup, Alexandru

30

Task allocation and scheduling in wireless distributed computing networks  

Science Conference Proceedings (OSTI)

Wireless distributed computing (WDC) is an enabling technology that allows radio nodes to cooperate in processing complex computational tasks of an application in a distributed manner. WDC research is being driven by the fact that mobile portable computing ... Keywords: Distributed computing, Power and energy consumption, Scheduling, Task allocation

Dinesh Datla; Haris I. Volos; S. M. Hasan; Jeffrey H. Reed; Tamal Bose

2011-12-01T23:59:59.000Z

31

Matthew R. Norman Scientific Computing Group  

E-Print Network (OSTI)

-present, Porting the Community Atmosphere Model - Spectral Element (CAM-SE) to ORNL's Titan Supercomputer National Laboratory PO BOX 2008 MS6016 Oak Ridge, TN 37831, USA normanmr@ornl.gov (865) 576-1757 Education-scale atmospheric simu- lation code, to run on Oak Ridge Leadership Computing Facility's (OLCF's) Titan super

32

Pseudo-interactive monitoring in distributed computing  

SciTech Connect

Distributed computing, and in particular Grid computing, enables physicists to use thousands of CPU days worth of computing every day, by submitting thousands of compute jobs. Unfortunately, a small fraction of such jobs regularly fail; the reasons vary from disk and network problems to bugs in the user code. A subset of these failures result in jobs being stuck for long periods of time. In order to debug such failures, interactive monitoring is highly desirable; users need to browse through the job log files and check the status of the running processes. Batch systems typically don't provide such services; at best, users get job logs at job termination, and even this may not be possible if the job is stuck in an infinite loop. In this paper we present a novel approach of using regular batch system capabilities of Condor to enable users to access the logs and processes of any running job. This does not provide true interactive access, so commands like vi are not viable, but it does allow operations like ls, cat, top, ps, lsof, netstat and dumping the stack of any process owned by the user; we call this pseudo-interactive monitoring. It is worth noting that the same method can be used to monitor Grid jobs in a glidein-based environment. We further believe that the same mechanism could be applied to many other batch systems.

Sfiligoi, I.; /Fermilab; Bradley, D.; Livny, M.; /Wisconsin U., Madison

2009-05-01T23:59:59.000Z

33

Computer Algebra Group at SFU - Past Meetings - CECM  

E-Print Network (OSTI)

Computer Algebra Group at SFU - Past Meetings (Spring 1998 through Summer 2002). January 1998 5 Petr Lisonek, ``Topics in Trigonometric Simplification''...

34

Multiclass Classification of Distributed Memory Parallel Computations  

E-Print Network (OSTI)

95616 b Abstract High Performance Computing (HPC) is a ?eldorganizing maps, High performance computing, Communicationpowerful known High Performance Computing (HPC) systems in

Whalen, Sean; Peisert, Sean; Bishop, Matt

2012-01-01T23:59:59.000Z

35

High Performance Computational Biology: A Distributed computing Perspective (2010 JGI/ANL HPC Workshop)  

SciTech Connect

David Konerding from Google, Inc. gives a presentation on "High Performance Computational Biology: A Distributed Computing Perspective" at the JGI/Argonne HPC Workshop on January 26, 2010.

Konerding, David [Google, Inc

2010-01-26T23:59:59.000Z

36

Function distribution in computer system architectures  

Science Conference Proceedings (OSTI)

The levelwise structuring and complexity of a computer system is presented informally and as a general model based upon the notion of abstract machines (processors), processes and interpreters. The important domains of the computer architect are considered ... Keywords: Computer architecture, Computer history, Computer system complexity

Harold W. Lawson, Jr.

1976-01-01T23:59:59.000Z

37

Perspectives on distributed computing : thirty people, four user types, and the distributed computing user experience.  

Science Conference Proceedings (OSTI)

This report summarizes the methodology and results of a user perspectives study conducted by the Community Driven Improvement of Globus Software (CDIGS) project. The purpose of the study was to document the work-related goals and challenges facing today's scientific technology users, to record their perspectives on Globus software and the distributed-computing ecosystem, and to provide recommendations to the Globus community based on the observations. Globus is a set of open source software components intended to provide a framework for collaborative computational science activities. Rather than attempting to characterize all users or potential users of Globus software, our strategy has been to speak in detail with a small group of individuals in the scientific community whose work appears to be the kind that could benefit from Globus software, learn as much as possible about their work goals and the challenges they face, and describe what we found. The result is a set of statements about specific individuals experiences. We do not claim that these are representative of a potential user community, but we do claim to have found commonalities and differences among the interviewees that may be reflected in the user community as a whole. We present these as a series of hypotheses that can be tested by subsequent studies, and we offer recommendations to Globus developers based on the assumption that these hypotheses are representative. Specifically, we conducted interviews with thirty technology users in the scientific community. We included both people who have used Globus software and those who have not. We made a point of including individuals who represent a variety of roles in scientific projects, for example, scientists, software developers, engineers, and infrastructure providers. The following material is included in this report: (1) A summary of the reported work-related goals, significant issues, and points of satisfaction with the use of Globus software; (2) A method for characterizing users according to their technology interactions, and identification of four user types among the interviewees using the method; (3) Four profiles that highlight points of commonality and diversity in each user type; (4) Recommendations for technology developers and future studies; (5) A description of the interview protocol and overall study methodology; (6) An anonymized list of the interviewees; and (7) Interview writeups and summary data. The interview summaries in Section 3 and transcripts in Appendix D illustrate the value of distributed computing software--and Globus in particular--to scientific enterprises. They also document opportunities to make these tools still more useful both to current users and to new communities. We aim our recommendations at developers who intend their software to be used and reused in many applications. (This kind of software is often referred to as 'middleware.') Our two core recommendations are as follows. First, it is essential for middleware developers to understand and explicitly manage the multiple user products in which their software components are used. We must avoid making assumptions about the commonality of these products and, instead, study and account for their diversity. Second, middleware developers should engage in different ways with different kinds of users. Having identified four general user types in Section 4, we provide specific ideas for how to engage them in Section 5.

Childers, L.; Liming, L.; Foster, I.; Mathematics and Computer Science; Univ. of Chicago

2008-10-15T23:59:59.000Z

38

Reliability-aware scheduling strategy for heterogeneous distributed computing systems  

Science Conference Proceedings (OSTI)

Heterogeneous computing systems are promising computing platforms, since single parallel architecture based systems may not be sufficient to exploit the available parallelism with the running applications. In some cases, heterogeneous distributed computing ... Keywords: Duplication, Heterogeneous distributed systems, Precedence constrained tasks, Reliability, Scheduling algorithm

Xiaoyong Tang; Kenli Li; Renfa Li; Bharadwaj Veeravalli

2010-09-01T23:59:59.000Z

39

Srinivasan Named Head of NERSC's Computational Systems Group  

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

Srinivasan Named Head 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 selected as the Computational Systems Group Lead in the NERSC Systems Department. In this role, he will supervise the day-to-day operation of all of NERSC's computer systems. Prior to taking on his new assignment, Srinivasan was the team lead for the PDSF cluster that supports Nuclear Physics and High Energy Physics. Srinivasan has more than 15 years of experience in high performance computing, both as a user and administrator. Since joining NERSC in 2001, he has worked on all the large systems from NERSC-3, the IBM/SP2 system called Seaborg, to Hopper, the Cray XE6 that is currently NERSC's

40

Leadership in small online collaborative learning groups: a distributed perspective  

Science Conference Proceedings (OSTI)

We examined emergent leadership in small online collaborative learning groups of pre-service math and science teachers. Groups worked online to design interdisciplinary instructional units. We employed a distributed leadership framework (Spillane, 2007) ...

Julia Gressick; Sharon Derry

2008-06-01T23:59:59.000Z

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


41

Virtual Data System on distributed virtual machines in computational grids  

Science Conference Proceedings (OSTI)

This paper presents the work of building a Grid workflow system on distributed virtual machines. A Grid Virtualisation Engine (GVE) is implemented to manage virtual machines as computing resources for Grid applications. The Virtual Data System ... Keywords: compact muon solenoid, distributed virtual machines, grid computing, grid workflow, high energy physics applications, virtual data systems

Lizhe Wang; Gregor Von Laszewski; Jie Tao; Marcel Kunze

2010-09-01T23:59:59.000Z

42

Supporting Deadline Constrained Distributed Computations on Grids  

Science Conference Proceedings (OSTI)

The growing popularity of grid and cloud computing has led to a renewed interest in resource control and coordination. The Actor model, which encapsulates objects along with threads of execution, offers a convenient way for scheduling computations' access ... Keywords: Adaptive scheduling, overhead tuning, actors

Xinghui Zhao; Nadeem Jamali

2011-09-01T23:59:59.000Z

43

Measuring the performance of parallel computers with distributed memory  

Science Conference Proceedings (OSTI)

Basic techniques for measuring the performance of parallel computers with distributed memory are considered. The results obtained via the de-facto standard LINPACK benchmark suite are shown to be weakly related to the efficiency of applied parallel programs. ... Keywords: HPC, MIMD, cluster, communication expenses, data processing, high-performance computing, optimization, parallel computations, performance, supercomputer

R. A. Iushchenko

2009-11-01T23:59:59.000Z

44

Utility Wind Integration Group Distributed Wind/Solar Interconnection  

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

Utility Wind Integration Group Distributed Wind/Solar Utility Wind Integration Group Distributed Wind/Solar Interconnection Workshop Utility Wind Integration Group Distributed Wind/Solar Interconnection Workshop May 21, 2013 8:00AM MDT to May 22, 2013 5:00PM MDT Golden, Colorado This two-day workshop will answer your questions about interconnecting wind and solar plants and other distributed generation applications to electric distribution systems while providing insight on integrating large-scale renewable generation into the transmission system. Held at the National Renewable Energy Laboratory's (NREL) state-of-the-art Energy Systems Integration Facility (ESIF) on the first day and at the Western Area Power Administration's Electric Power Training Center (EPTC) on the second day, the workshop will provide an overview of wind and solar interconnection

45

Distributed computation in wireless and dynamic networks  

E-Print Network (OSTI)

Today's wireless networks tend to be centralized: they are organized around a fixed central backbone such as a network of cellular towers or wireless access points. However, as mobile computing devices continue to shrink ...

Oshman, Rotei

2012-01-01T23:59:59.000Z

46

Multiple Bypass: Interposition Agents for Distributed Computing  

Science Conference Proceedings (OSTI)

Interposition agents are a well-known device for attaching legacy applications to distributed systems. However, agents are difficult to build and are often large, monolithic pieces of software which are suited only to limited applications or systems. ... Keywords: distributed system, interposition agent, remote execution

Douglas Thain; Miron Livny

2001-03-01T23:59:59.000Z

47

Distributed computing of Seismic Imaging Algorithms  

E-Print Network (OSTI)

The primary use of technical computing in the oil and gas industries is for seismic imaging of the earth's subsurface, driven by the business need for making well-informed drilling decisions during petroleum exploration and production. Since each oil/gas well in exploration areas costs several tens of millions of dollars, producing high-quality seismic images in a reasonable time can significantly reduce the risk of drilling a "dry hole". Similarly, these images are important as they can improve the position of wells in a billion-dollar producing oil field. However seismic imaging is very data- and compute-intensive which needs to process terabytes of data and require Gflop-years of computation (using "flop" to mean floating point operation per second). Due to the data/computing intensive nature of seismic imaging, parallel computing are used to process data to reduce the time compilation. With introducing of Cloud computing, MapReduce programming model has been attracted a lot of attention in parallel and di...

Emami, Masnida; Jaberi, Nasrin

2012-01-01T23:59:59.000Z

48

Option pricing, maturity randomization and distributed computing  

Science Conference Proceedings (OSTI)

We price discretely monitored options when the underlying evolves according to different exponential Levy processes. By geometric randomization of the option maturity, we transform the n-steps backward recursion that arises in option pricing into an ... Keywords: Discrete monitoring, Grid computing, Integral equations, Lvy processes, Option pricing

Gianluca Fusai; Daniele Marazzina; Marina Marena

2010-07-01T23:59:59.000Z

49

Distributed Quantum Computation Architecture Using Semiconductor Nanophotonics  

E-Print Network (OSTI)

In a large-scale quantum computer, the cost of communications will dominate the performance and resource requirements, place many severe demands on the technology, and constrain the architecture. Unfortunately, fault-tolerant computers based entirely on photons with probabilistic gates, though equipped with "built-in" communication, have very large resource overheads; likewise, computers with reliable probabilistic gates between photons or quantum memories may lack sufficient communication resources in the presence of realistic optical losses. Here, we consider a compromise architecture, in which semiconductor spin qubits are coupled by bright laser pulses through nanophotonic waveguides and cavities using a combination of frequent probabilistic and sparse determinstic entanglement mechanisms. The large photonic resource requirements incurred by the use of probabilistic gates for quantum communication are mitigated in part by the potential high-speed operation of the semiconductor nanophotonic hardware. The system employs topological cluster-state quantum error correction for achieving fault-tolerance. Our results suggest that such an architecture/technology combination has the potential to scale to a system capable of attacking classically intractable computational problems.

Rodney Van Meter; Thaddeus D. Ladd; Austin G. Fowler; Yoshihisa Yamamoto

2009-06-15T23:59:59.000Z

50

Asynchronous group key distribution on top of the cc2420 security mechanisms for sensor networks  

Science Conference Proceedings (OSTI)

A sensor network is a network consisting of small, inexpensive, low-powered sensor nodes that communicate to complete a common task. Sensor nodes are characterized by having limited communication and computation capabilities, energy, and storage. They ... Keywords: cc2420 security, group key distribution, sensor network security

Morten Tranberg Hansen

2009-03-01T23:59:59.000Z

51

Parallel Computing Environments and Methods for Power Distribution System Simulation  

SciTech Connect

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.

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

2005-11-10T23:59:59.000Z

52

Snir gives keynote address at distributed computing conference | Argonne  

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

Snir gives keynote address at distributed computing conference Snir gives keynote address at distributed computing conference August 14, 2013 Tweet EmailPrint Marc Snir, director of Argonne's Mathematics and Computer Science Division and Argonne Distinguished Fellow, delivered a keynote address at the joint PODC/SPAA symposium held in Montreal, Canada, July 22-24, 2013. The PODC (Principles of Distributed Computing) symposium was collocated this year with SPAA (Symposium on Parallelism in Algorithms and Architectures). Both annual conferences are sponsored by the Association for Computer Machinery. Snir's presentation, titled "Supercomputing: Technical Evolution and Programming Models," began with a description of punctuated equilibrium and three technological (r)evolutionary developments in high-performance

53

Lateral Distribution for Aligned Events in Muon Groups Deep Underground  

E-Print Network (OSTI)

The paper concerns the so-called aligned events observed in cosmic rays. The phenomenon of the alignment of the most energetic subcores of gamma-ray--hadron ($\\gamma-h$) families (particles of the highest energies in the central EAS core) was firstly found in the "Pamir" emulsion chamber experiment and related to a coplanar particle production at $E_0>10^{16}$ eV. Here a separation distribution (distances between pairs of muons) for aligned events has been analyzed throughout muon groups measured by Baksan Underground Scintillation Telescope (BUST) for threshold energies $0.85 \\div 3.2$ TeV during a period of 7.7 years. Only muon groups of multiplicity $m\\geq 4$ with inclined trajectories for an interval of zenith angles $50^\\circ - 60^\\circ$ were selected for the analysis. The analysis has revealed that the distribution complies with the exponential law. Meanwhile the distributions become steeper with the increase of threshold energy. There has been no difference between the lateral distribution of all the groups and the distribution of the aligned groups.

A. L. Tsyabuk; R. A. Mukhamedshin; Yu. V. Stenkin

2007-01-09T23:59:59.000Z

54

Distributed sensor networks with collective computation  

Science Conference Proceedings (OSTI)

Simulations of a network of N sensors have been performed. The simulation space contains a number of sound sources and a large number of sensors. Each sensor is equipped with an omni-directional microphone and is capable of measuring only the time of arrival of a signal. Sensors are able to wirelessly transmit and receive packets of information, and have some computing power. The sensors were programmed to merge all information (received packets as well as local measurements) into a 'world view' for that node. This world view is then transmitted. In this way, information can slowly diffuse across the network. One node was monitored in the network as a proxy for when information had diffused across the network. Simulations demonstrated that the energy expended per sensor per time step was approximately independent of N.

Lanman, D. R. (Douglas R.)

2001-01-01T23:59:59.000Z

55

Designing computational steering facilities for distributed agent based simulations  

Science Conference Proceedings (OSTI)

Agent-Based Models (ABMs) are a class of models which, by simulating the behavior of multiple agents (i.e., ndependent actions, interactions and adaptation), aim to emulate and/or predict complex phenomena. One of the general features of ABM simulations ... Keywords: agent-based simulation, computational steering, distributed systems, visualization of distributed models

Gennaro Cordasco, Rosario De Chiara, Francesco Raia, Vittorio Scarano, Carmine Spagnuolo, Luca Vicidomini

2013-05-01T23:59:59.000Z

56

Clock distribution system for digital computers  

DOE Patents (OSTI)

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

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

1981-01-01T23:59:59.000Z

57

A framework for supporting joint interpersonal attention in distributed groups  

Science Conference Proceedings (OSTI)

Informal interactions are a key element of workgroup communication, but have proven difficult to support in distributed groups. One reason for this is that existing systems have focused either on novel means for gathering information about the availability ... Keywords: CMC, CSCW, attention, awareness, interaction

Jeremy Birnholtz; Johnathon Schultz; Matthew Lepage; Carl Gutwin

2011-09-01T23:59:59.000Z

58

Distribution of goals addressed to a group of agents  

Science Conference Proceedings (OSTI)

The problem investigated in this paper is the distribution of goals addressed to a group of rational agents. Those agents are characterized by their ability (i.e. what they can do), their knowledge about the world and their commitments.The goals of the ... Keywords: goal selection, modal logic, multiagent systems, qualitative decision theory, theories of rational agency

Laurence Cholvy; Christophe Garion

2003-07-01T23:59:59.000Z

59

Long-term variation in distribution of sunspot groups  

E-Print Network (OSTI)

We studied the relation between the distribution of sunspot groups and the Gleissberg cycle. As the magnetic field is related to the area of the sunspot groups, we used area-weighted sunspot group data. On the one hand, we confirm the previously reported long-term cyclic behaviour of the sum of the northern and southern sunspot group mean latitudes, although we found a somewhat longer period (P~104 years). We introduced the difference between the ensemble average area of sunspot groups for the two hemispheres, which turns out to show similar behaviour. We also investigated a further aspect of the Gleissberg cycle where while in the 19th century the consecutive Schwabe cycles are sharply separated from each other, one century later the cycles overlap each other more and more.

Forgacs-Dajka, E; Borkovits, T

2004-01-01T23:59:59.000Z

60

Pattern-Oriented Software Architecture: A Pattern Language for Distributed Computing  

Science Conference Proceedings (OSTI)

Providing a guide to the best practices in key areas of distributed computing, this book describes a single pattern language that links many patterns relevant to distributed computing.

Frank Buschmann; Kevlin Henney; Douglas Schmidt

2007-04-01T23:59:59.000Z

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


61

A directory service for configuring high-performance distributed computations  

Science Conference Proceedings (OSTI)

High-performance execution in distributed computing environments often requires careful selection and configuration not only of computers, networks, and other resources but also of the protocols and algorithms used by applications. Selection and configuration in turn require access to accurate, up-to-date information on the structure and state of available resources. Unfortunately, no standard mechanism exists for organizing or accessing such information. Consequently, different tools and applications adopt ad hoc mechanisms, or they compromise their portability and performance by using default configurations. We propose a Metacomputing Directory Service that provides efficient and scalable access to diverse, dynamic, and distributed information about resource structure and state. We define an extensible data model to represent required information and present a scalable, high-performance, distributed implementation. The data representation and application programming interface are adopted from the Lightweight Directory Access Protocol; the data model and implementation are new. We use the Globus distributed computing toolkit to illustrate how this directory service enables the development of more flexible and efficient distributed computing services and applications.

Fitzgerald, S.; Kesselman, C. [Univ. of Southern California, Marina del Rey, CA (United States). Information Sciences Institute; Foster, I. [Argonne National Lab., IL (United States)] [and others

1997-08-01T23:59:59.000Z

62

RIKEN HPCI Program for Computational Life Sciences Planning and Coordination Group  

E-Print Network (OSTI)

of computational resources offered by the High Performance Computing Infrastructure, with the K computer to the public and gaining long-term support. High Performance Computing Development Group Planning-Liner line 15 minutes 3 minutes High Performance Computing Development Group1 2. Promotionof

Fukai, Tomoki

63

Plant Process Computer Replacement to Support Distributed Process Control: Joint STPNOC-EPRI Distributed Plant Process Computer Syst em Project  

Science Conference Proceedings (OSTI)

Concerns exist that nuclear power plant process computer systems are becoming obsolete and do not have the infrastructure to support new processes such as digital process control upgrades. To address these concerns, a distributed plant process computer system was designed and implemented at the South Texas Project Nuclear Operating Company Units 1 and 2. Implementing this new system and its associated plant networks, if done correctly, will facilitate future control and information system upgrades that c...

2001-11-16T23:59:59.000Z

64

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

A New Modular GCD Algorithm which is lucky everywhere. George Labahn, Department of Computer Science, University of Waterloo. Modular computation is a...

65

Evolutionary computation on complex spatially-distributed networks  

Science Conference Proceedings (OSTI)

In this paper, we describe a new computational approach to optimize the architecture of complex spatially-distributed networks. The proposed approach is based on an evolutionary search of "what-if" networks generated from a seed network. A genetic algorithm ... Keywords: genetic algorithms, optimization, performance measures, socio-technical networks

Marcin L. Pilat; Irene Pestov

2010-07-01T23:59:59.000Z

66

Legacy Computing Markup Language (LCML) and LEGEND -- LEGacy Encapsulation for Network Distribution  

E-Print Network (OSTI)

The rapid increase of computing power and emergence of distributed computing technologies such as Grid computing create new opportunities for scientific computing. One of the challenges faced in harnessing the emerging ...

Geiger, Stephen Kurt

2004-01-01T23:59:59.000Z

67

Computer-aided coordination and overcurrent protection for distribution systems  

Science Conference Proceedings (OSTI)

Overcurrent protection and coordination studies for electrical distribution systems have become much easier to perform with the emergence of several commercially available software programs that run on a personal computer. These programs have built-in libraries of protective device time-current curves, damage curves for cable and transformers, and motor starting curves, thereby facilitating the design of a selectively coordinated protection system which is also well-protected. Additionally, design time when utilizing computers is far less than the previous method of tracing manufacturers` curves on transparent paper. Basic protection and coordination principles are presented in this paper along with several helpful suggestions for designing electrical protection systems. A step-by-step methodology is presented to illustrate the design concepts when using software for selecting and coordinating the protective devices in distribution systems.

Tolbert, L.M.

1995-03-01T23:59:59.000Z

68

Elemental: a new framework for distributed memory dense matrix computations.  

SciTech Connect

Parallelizing dense matrix computations to distributed memory architectures is a well-studied subject and generally considered to be among the best understood domains of parallel computing. Two packages, developed in the mid 1990s, still enjoy regular use: ScaLAPACK and PLAPACK. With the advent of many-core architectures, which may very well take the shape of distributed memory architectures within a single processor, these packages must be revisited since the traditional MPI-based approaches will likely need to be extended. Thus, this is a good time to review lessons learned since the introduction of these two packages and to propose a simple yet effective alternative. Preliminary performance results show the new solution achieves competitive, if not superior, performance on large clusters.

Romero, N.; Poulson, J.; Marker, B.; Hammond, J.; Van de Geijn, R. (LCF); (The Univ. of Texas at Austin)

2012-02-14T23:59:59.000Z

69

Brookhaven Reactor Experiment Control Facility, a distributed function computer network  

SciTech Connect

A computer network for real-time data acquisition, monitoring and control of a series of experiments at the Brookhaven High Flux Beam Reactor has been developed and has been set into routine operation. This reactor experiment control facility presently services nine neutron spectrometers and one x-ray diffractometer. Several additional experiment connections are in progress. The architecture of the facility is based on a distributed function network concept. A statement of implementation and results is presented. (auth)

Dimmler, D.G.; Greenlaw, N.; Kelley, M.A.; Potter, D.W.; Rankowitz, S.; Stubblefield, F.W.

1975-11-01T23:59:59.000Z

70

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

... answered by first reducing F to row Echelon form using Gaussian elimination. ... polynomial equations and a way to compute standard representatives for the...

71

Computer Algebra Group at SFU - Preprints and Proposals - CECM  

E-Print Network (OSTI)

Poster, ISSAC 2010, Munich, Germany, July 2010. Poster, Computers and Mathematics day, SFU, Vancouver, August 12th, 2010. Andrew Arnold and Michael...

72

Computer science students' experiences of decision making in project groups  

Science Conference Proceedings (OSTI)

This paper describes a study intended to understand the ways in which students experience the process of decision-making in computer science student projects. It also investigates the ways the student team works to make decisions. The empirical setting ...

Mattias Wiggberg

2007-11-01T23:59:59.000Z

73

Implementation of KIVA-3 on distributed memory MIMD computers  

DOE Green Energy (OSTI)

KIVA-3 is the latest version of a 3-D Finite Difference CFD code developed by Amsden for combustion engine simulations. A distributed-memory implementation has many advantages for problems that hardly fit affordable existing memory banks. Previous attempts to parallelize KIVA-2 by Yasar, et al. were focused mostly on diffusion solvers because of their heavy time consumption during execution. The study suggested a complete parallelization of the code, including advection and spray dynamics, along with the use of a block-wise decomposition scheme to assure an efficient load balancing and a low communication/computation ratio. Here, the authors report rather a general analysis of the issues involved in such a distributed implementation for the latest version of the code, KIVA-3, on MIMD parallel systems. A more detailed analysis of the code and corresponding algorithms have already been implemented by Yasar and will be published soon.

Yasar, O.; Zacharia, T.; Aggarwal, R. [Oak Ridge National Lab., TN (United States); Amsden, A.A.; Baumgardner, J.R. [Oak Ridge National Lab., TN (United States). Center for Computational Sciences]|[Los Alamos National Lab., NM (United States)

1995-04-01T23:59:59.000Z

74

SIGEVOlutionnewsletter of the ACM Special Interest Group on Genetic and Evolutionary Computation Volume 1 Issue 1  

E-Print Network (OSTI)

SIGEVOlutionnewsletter of the ACM Special Interest Group on Genetic and Evolutionary Computation of SIGEVOlution, the newsletter of the ACM Special Inter- est Group on Genetic and Evolutionary Computation of evolutionary compu- tation developed at American Air Liquide. In his position paper, Jon McCormack discusses

McCormack, Jon

75

Inferring Group Processes from Computer-Mediated Affective Text Analysis  

SciTech Connect

Political communications in the form of unstructured text convey rich connotative meaning that can reveal underlying group social processes. Previous research has focused on sentiment analysis at the document level, but we extend this analysis to sub-document levels through a detailed analysis of affective relationships between entities extracted from a document. Instead of pure sentiment analysis, which is just positive or negative, we explore nuances of affective meaning in 22 affect categories. Our affect propagation algorithm automatically calculates and displays extracted affective relationships among entities in graphical form in our prototype (TEAMSTER), starting with seed lists of affect terms. Several useful metrics are defined to infer underlying group processes by aggregating affective relationships discovered in a text. Our approach has been validated with annotated documents from the MPQA corpus, achieving a performance gain of 74% over comparable random guessers.

Schryver, Jack C [ORNL; Begoli, Edmon [ORNL; Jose, Ajith [Missouri University of Science and Technology; Griffin, Christopher [Pennsylvania State University

2011-02-01T23:59:59.000Z

76

UWIG Distributed Wind Impacts Analysis Tool Progress Report: Utility Wind Interest Group Distributed Wind Impacts Project  

Science Conference Proceedings (OSTI)

Distributed wind generation systems consist of small clusters of wind turbines located near small load centers and connected directly to the distribution system. Depending on the electrical characteristics of the distribution line, the type of wind turbine, and the relative locations of the interconnection to the distribution system, the substation, and customer connections, distributed wind generation can significantly affect the stability, power quality, and operations of the distribution line. As a re...

2004-03-29T23:59:59.000Z

77

A Cloud Computing Method for Distributed Clustering of ...  

Analyzing large volumes of text requires sophisticated algorithms and racks of computers. This invention removes the need for racks of computers to do ...

78

A Framework for Middleware Supporting Real-Time Wide-Area Distributed Computing  

E-Print Network (OSTI)

computing is to effect impor- tant output actions within precisely specified time- windows. In RT DC systems-Oriented Real-time Distributed Computing), Washington D.C., April 2002, pp. 288-294. [Kop97] Kopetz, H., 'Real specification. 1. Introduction The history of distributed computing (DC) spans more than three decades

California at San Diego, University of

79

On a group schedule management system using preference-based distributed ATMS  

E-Print Network (OSTI)

ATMS On a group schedule management system using preference-based distributed ATMS y y Takayuki Ito Science Abstract: In this paper, we propose a group schedule management system using a preference- based distributed ATMS (Assumption-based Truth Maintenance System). We can classify group schedules into three types

80

The CACHE Study: Group Effects in Computer-supported Collaborative Analysis  

Science Conference Proceedings (OSTI)

The present experiment investigates effects of group composition in computer-supported collaborative intelligence analysis. Human cognition, though highly adaptive, is also quite limited, leading to systematic errors and limitations in performance --- ... Keywords: CACHE, CSCW, collaboration, group bias, group decision-making, intelligence analysis

Gregorio Convertino; Dorrit Billman; Peter Pirolli; J. P. Massar; Jeff Shrager

2008-08-01T23:59:59.000Z

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


81

Distributed Multimodal Information Processing GroupINTERNET OF THINGS  

E-Print Network (OSTI)

Small and lightweight components become more and more powerful, and at the same time cheaper. This enables the augmentation of physical objects with digital technology (e.g., information processing, communication). The interconnection of such intelligent devices leads away from the classical internet of computers towards the Internet of Things. This development has a wide range of implications in the dimensions of technology, applications and society. A significant area of application areas will be influenced by the Internet of Things, from private households over mobility to research and industry. In this seminar, various aspects of the Internet of Things were investigated. In the technological domain, the underlying communication technologies and hardware was discussed and an overview of interaction techniques with intelligent objects was gained. Furthermore, an overview of application domains was given and, based on selected examples, deeper investigated, such as the Internet of Vehicles. Last but not least, also economical implications and potential business models were investigated. Each of the single chapters addresses a specific topic and presents fundamental research trends and developments. This

Eckehard Steinbach; Matthias Kranz; Anas Al-nuaimi; Stefan Diewald; Andreas Mller; Luis Roalter; Florian Schweiger (editors; Technische Universitt Mnchen

2013-01-01T23:59:59.000Z

82

Key distribution and update for secure inter-group multicast communication  

Science Conference Proceedings (OSTI)

Group communication has become an important component in wireless networks. In this paper, we focus on the environments in which multiple groups coexist in the system, and both intra and inter group multicast traffic must be protected by secret keys. ... Keywords: inter-group communication, key distribution and update, security

Weichao Wang; Bharat Bhargava

2005-11-01T23:59:59.000Z

83

HARTEX: a safe real-time kernel for distributed computer control systems  

Science Conference Proceedings (OSTI)

A hard real-time kernel is presented for distributed computer control systems (DCCS), highlighting a number of novel features, such as integrated scheduling of hard and soft real-time tasks as well as tasks and resources; high-performance time management ... Keywords: distributed computer control systems, object modelling techniques, real-time communication, real-time operating systems, scheduling algorithms

C. K. Angelov; I. E. Ivanov; A. Burns

2002-03-01T23:59:59.000Z

84

ISSN0249-0803ISRNINRIA/RT--0395--FR+ENG Distributed and High Performance Computing  

E-Print Network (OSTI)

apport technique ISSN0249-0803ISRNINRIA/RT--0395--FR+ENG Distributed and High Performance Computing Performance Computing ?quipe-Projet Myriads Rapport technique n° 0395 -- Octobre 2010 -- 15 pages Abstract-Dina Tîra , Pierre Riteau , Jérôme Gallard , Christine Morin , Yvon Jégou Theme : Distributed and High

Paris-Sud XI, Université de

85

Distributed computing for carbon footprint reduction by exploiting low-footprint energy availability  

Science Conference Proceedings (OSTI)

Low carbon footprint energy sources such as solar and wind power typically suffer from unpredictable or limited availability. By globally distributing a number of these renewable sources, these effects can largely be compensated for. We look at the feasibility ... Keywords: Carbon footprint, Distributed computing, Energy-efficiency, Green ICT, Grid computing, Power consumption

Ward Van Heddeghem; Willem Vereecken; Didier Colle; Mario Pickavet; Piet Demeester

2012-02-01T23:59:59.000Z

86

The E ect of Heavy-Tailed Job Size Distributions on Computer System Design.  

E-Print Network (OSTI)

The E ect of Heavy-Tailed Job Size Distributions on Computer System Design. Mor Harchol-Balter Laboratory for Computer Science MIT, NE43-340 Cambridge, MA 02139 harchol@theory.lcs.mit.edu Abstract Heavy physical phenomena to sociological phenomena. Recently heavy-tailed distributions have been discovered

Harchol-Balter, Mor

87

Optical Packet Routing in Distributed Grid Computing Architectures Odile Liboiron-Ladouceur and Keren Bergman  

E-Print Network (OSTI)

Optical Packet Routing in Distributed Grid Computing Architectures Odile Liboiron resources into a single focused application using an optical control plane. Large-scale distributed grid simple grid computing architecture that employs three 12x12 OPS networks based on the data vortex [2

Bergman, Keren

88

Molecular dynamics on distributed-memory MIMD computers with load balancing  

Science Conference Proceedings (OSTI)

We report two aspects of a computational molecular dynamics study of large-scale problems on a distributed-memory MIMD parallel computer: (1) efficiency and scalability results on Intel Paragon parallel computers with up to 512 nodes and (2) a new method for dynamic load balancing.

Deng, Y.; McCoy, R.A. [State Univ. of New York, Stony Brook, NY (United States). Research Foundation; Marr, R.B.; Peierls, R.F. [Brookhaven National Lab., Upton, NY (United States); Yasar, O. [Brookhaven National Lab., Upton, NY (United States)

1994-12-31T23:59:59.000Z

89

An assessment of accountability policies for large-scale distributed computing systems  

Science Conference Proceedings (OSTI)

Grid computing systems offer resources to solve large-scale computational problems and are thus widely used in a large variety of domains, including computational sciences, energy management, and defense. Accountability in these application domains is ... Keywords: accountability, distributed systems, grid, policies, scalability

Wonjun Lee; Anna C. Squicciarini; Elisa Bertino

2009-04-01T23:59:59.000Z

90

Developing a secure distributed OSGI cloud computing infrastructure for sharing health records  

Science Conference Proceedings (OSTI)

Cloud Computing has become an emerging computing paradigm which brings new opportunities and challenges to overcome. While the cloud provides seemingly limitless scalability and an alternative to expensive data center infrastructure, it raises new issues ... Keywords: cloud computing, cloud security, distributed OSGi, electronic healthcare records

Sabah Mohammed; Daniel Servos; Jinan Fiaidhi

2011-06-01T23:59:59.000Z

91

Low-Complexity Message-Passing Algorithms for Distributed Computation  

E-Print Network (OSTI)

Distributed subgradient projection algorithm for convexnon-expansivity of the projection, and step (ii) followsr, let ? r denote the projection operator onto the span of {

Noorshams, Nima

2013-01-01T23:59:59.000Z

92

UNIX Host Administration in a Hererogeneous Distributed Computing Environment  

Science Conference Proceedings (OSTI)

Managing a computing environment consisting of hundreds of systems from multiple vendors and hundreds of users dispersed over several buildings of a research campus is a complex task. We developed a data model for representing pertinent information about ...

Gregory S. Thomas; James O. Schroeder; Merrilee E. Orcutt; Desiree C. Johnson; Jeffrey T. Simmelink; John P. Moore

1996-10-01T23:59:59.000Z

93

Performance driven multi-objective distributed scheduling for parallel computations  

Science Conference Proceedings (OSTI)

With the advent of many-core architectures and strong need for Petascale (and Exascale) performance in scientific domains and industry analytics, efficient scheduling of parallel computations for higher productivity and performance has become very important. ...

Ankur Narang; Abhinav Srivastava; Naga Praveen Kumar Katta; Rudrapatna K. Shyamasundar

2011-07-01T23:59:59.000Z

94

Distributed computing in the 21st century: some aspects of cloud computing  

Science Conference Proceedings (OSTI)

The Cloud Computing paradigm has gained considerable attention owing to the notable commercial success of many Cloud service providers. Typically, a Cloud Computing service provides its customers with resources as a utility, using a pay-as-you-go model. ... Keywords: cloud computing, peer to peer systems, quality of service, virtualization

Fabio Panzieri; Ozalp Babaoglu; Stefano Ferretti; Vittorio Ghini; Moreno Marzolla

2011-01-01T23:59:59.000Z

95

Computational Engineering on the Grid: Crafting a Distributed Virtual Reactor  

Science Conference Proceedings (OSTI)

This paper reports on our research into supporting collaborative distributed applications on the Grid. Our case study application, a Virtual Reactor problem solving environment, was built for simulation of industrially important technology of plasma ...

V. V. Krzhizhanovskaya; V. V. Korkhov; A. Tirado-Ramos; D. J. Groen; I. V. Shoshmina; I. A. Valuev; I. V. Morozov; N. V. Malyshkin; Y. E. Gorbachev; P. M. A. Sloot

2006-12-01T23:59:59.000Z

96

A novel method for flux distribution computation in metabolic networks  

Science Conference Proceedings (OSTI)

In recent years, the study on metabolic networks has attracted considerable attention from the research community. Though the topological structures of genome-scale metabolic networks of some organisms have been investigated, their metabolic flux distributions ...

Da Jiang; Shuigeng Zhou; Jihong Guan

2007-03-01T23:59:59.000Z

97

Computationally Convenient Distributional Assumptions for Common-ValueAuctions  

Science Conference Proceedings (OSTI)

Although the mathematical foundations of common-value auctions have been well understood since Milgrom and Weber (1982), equilibrium bidding strategies are computationally complex. Very few calculated examples can be found in the literature, and only ... Keywords: common-value auctions

Michael B. Gordy

1998-08-01T23:59:59.000Z

98

DisTec: Towards a Distributed System for Telecom Computing  

Science Conference Proceedings (OSTI)

The continued exponential growth in both the volume and the complexity of information, compared with the computing capacity of the silicon-based devices restricted by Moore's Law, is giving birth to a new challenge to the specific requirements of analysts, ...

Shengqi Yang; Bai Wang; Haizhou Zhao; Yuan Gao; Bin Wu

2009-11-01T23:59:59.000Z

99

Network of Excellence in Distributed and Dependable Computing Systems  

E-Print Network (OSTI)

This document presents a CaberNet vision of Research and Technology Development (RTD) in Distributed and Dependable systems. It takes as a basis the state-of-the-art (SOTA) Report prepared by John Bates in 1998: this document was commissioned by CaberNet as a first step towards the definition of a roadmap for European research in distributed and dependable systems. This report overviewed the developments in the main areas to which the CaberNet members made outstanding contributions, which were the most important at the time of its preparation, and analysed the most important trends in R&D in those areas

Alexander Romanovsky (ed); Edited Alexander Romanovsky

2004-01-01T23:59:59.000Z

100

A Computational Web Portal for the Distributed Marine Environment Forecast System  

Science Conference Proceedings (OSTI)

This paper describes a prototype computational Web Portal for the Distributed Marine Environment Forecast System (DMEFS). DMEFS is a research framework to develop and operate validated Climate-Weather-Ocean models. The DMEFS portal is implemented as ...

Tomasz Haupt; Purushotham Bangalore; Gregory Henley

2001-06-01T23:59:59.000Z

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


101

Using VCL technology to implement distributed reconfigurable data centers and computational services for educational institutions  

Science Conference Proceedings (OSTI)

Small distributed data centers and laboratories are becoming increasingly expensive to provision, support, and maintain on their own. In this paper, we discuss how North Carolina State University Virtual Computing Laboratory (VCL) technology can be used ...

M. A. Vouk; A. Rindos; S. F. Averitt; J. Bass; M. Bugaev; A. Kurth; A. Peeler; H. E. Schaffer; E. D. Sills; S. Stein; J. Thompson; M. Valenzisi

2009-07-01T23:59:59.000Z

102

Effects of Drop-Size-Distribution Truncation on Computer Simulations of Dual-Measurement Radar Methods  

Science Conference Proceedings (OSTI)

An investigation is made of the effects of truncating the raindrop-size distribution at minimum and maximum diameters on the results of computer simulations of dual-measurement radar methods. The dual-measurement methods investigated include ...

Carlton W. Ulbrich

1992-07-01T23:59:59.000Z

103

A data throughput prediction and optimization service for widely distributed many-task computing  

Science Conference Proceedings (OSTI)

In this paper, we present the design and implementation of a network throughput prediction and optimization service for many-task computing in widely distributed environments. This service uses multiple parallel TCP streams to improve the end-to-end ... Keywords: Stork, many-task computing, modeling, optimization, parallel TCP streams, prediction, scheduling

Dengpan Yin; Esma Yildirim; Tevfik Kosar

2009-11-01T23:59:59.000Z

104

Service and Utility Oriented Distributed Computing Systems: Challenges and Opportunities for Modeling and Simulation Communities  

E-Print Network (OSTI)

for Modeling and Simulation Communities Rajkumar Buyya and Anthony Sulistio Grid Computing and Distributed- oriented computing systems such as Data Centers and Grids. We present various case studies on the use by the electrical power grid's pervasiveness and reliability, began exploring the design and development of a new

Buyya, Rajkumar

105

A Comparative Study on the Performance of the Parallel and Distributing Computing Operation in MatLab  

Science Conference Proceedings (OSTI)

This study describes the performance results on testing MatLab applications using the parallel computing and the distributed computing toolboxes under different platforms with different hardware and operating systems. Each trial was executed keeping ... Keywords: MatLab, HPC, parallel computing, distributed computing, performance metrics

Mohammed Goryawala; Magno R. Guillen; Ruchir Bhatt; Anthony Mcgoron; Malek Adjouadi

2010-04-01T23:59:59.000Z

106

Security computing for the resiliency of protecting from internal attacks in distributed wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor network (WSNs) have been making up of a mass of spatially distributed autonomous sensors to monitor physical or environmental conditions. However, security threats to WSNs become increasingly diversified, prevention based due to their ... Keywords: distributed wireless sensor networks, internal attacks, resiliency, security computing, sensor optimum deployment

Xu Huang; Dharmendra Sharma; Muhammad Ahmed

2012-09-01T23:59:59.000Z

107

FICS--A PROGRAM TO COMPUTE FEW-GROUP CONSTANTS WITHIN THE KARE DIFFUSION THEORY SYSTEM  

DOE Green Energy (OSTI)

FICS is a group constant program available as an alternative to the WOXX routine within the KARE System. FICS computes diffusion constants and macroscopic cross sections for slowing down, absorption, nu -fission, and total removal in two, three, or four energy groups for each compositional region in the reactor model. The one-group thermal constants are provided by a variational technique which computes an approximate Wigner-Wilkins flux spectrum as a linear combination of two trial spectra. These consist of a low-absorption spectrum and a high-absorption spectrum, covering the energies below 0.625 ev in 32 lethargy intervals. The thermal group constants are determined by averaging lethargy- dependent microscopic cross sections and diffusion constants over the composite spectrum. FICS' thermal constants are temperaturedependent with region temperatures from 68 to 600 nif- F permitted. In the fast energy range, 10 Mev to 0.625 ev, the program computes temperature-independent constants in one, two, or three energy groups. These are determined from stored microscopic cross sections which were obtained by curve fitting to MUFT parameters over a wide range of metal-water ratios. FICS provides optional calculations, some of which modify the group constants for special purposes, while others merely prepare and transmit data to other segments. Included are: automatic Xenon determination; special prescriptions for thin, highly absorbing regions; an adjoint option; a technique for handling window shade'' control rods; automatic calculation of fission products; mixed number density modification; spectrum option; precalculated group constant option, depletion option; AMOK option; and special calculations for r-z synthesis. (auth)

Goodman, D.E.

1963-01-01T23:59:59.000Z

108

Geographic Information Systems Applications on an ATM-Based Distributed High Performance Computing System  

E-Print Network (OSTI)

. We present a distributed geographic information system (DGIS) built on a distributed high performance computing environment using a number of software infrastructural building blocks and computational resources interconnected by an ATM-based broadband network. Archiving, access and processing of scientific data are discussed in the context of geographic and environmental applications with special emphasis on the potential for local-area weather, agriculture, soil and land management products. Software technologies such as tiling and caching techniques can be used to optimise storage requirements and response time for applications requiring very large data sets such as multi-channel satellite data. Distributed High Performance Computing hardware technology underpins our proposed system. In particular, we discuss the capabilities of a distributed hardware environment incorporating: high bandwidth communications networks such as Telstra's Experimental Broadband Network (EBN); large capa...

November Hawick

1997-01-01T23:59:59.000Z

109

Distribution of orbits in $\\R^2$ of a finitely generated group of $\\SL(2,\\R)$  

E-Print Network (OSTI)

In this work, we study the asymptotic distribution of the non discrete orbits of a finitely generated group acting linearly on $\\R^2$. To do this, we establish new equidistribution results for the horocyclic flow on the unitary tangent bundle of the associated surface.

Maucourant, Franois

2012-01-01T23:59:59.000Z

110

Application of the TEMPEST computer code for simulating hydrogen distribution in model containment structures. [PWR; BWR  

SciTech Connect

In this study several aspects of simulating hydrogen distribution in geometric configurations relevant to reactor containment structures were investigated using the TEMPEST computer code. Of particular interest was the performance of the TEMPEST turbulence model in a density-stratified environment. Computed results illustrated that the TEMPEST numerical procedures predicted the measured phenomena with good accuracy under a variety of conditions and that the turbulence model used is a viable approach in complex turbulent flow simulation.

Trent, D.S.; Eyler, L.L.

1982-09-01T23:59:59.000Z

111

Microsoft Word - The Essential Role of New Network Services for High Performance Distributed Computing - PARENG.CivilComp.2011.  

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

International Conference on Parallel, Distributed, Grid and International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering 12-15 April 2011, Ajaccio - Corsica - France In "Trends in Parallel, Distributed, Grid and Cloud Computing for Engineering," Edited by: P. Iványi, B.H.V. Topping, Civil-Comp Press. Network Services for High Performance Distributed Computing and Data Management W. E. Johnston, C. Guok, J. Metzger, and B. Tierney ESnet and Lawrence Berkeley National Laboratory, Berkeley California, U.S.A Keywords: high performance distributed computing and data management, high throughput networks, network services, science use of networks Much of modern science is dependent on high performance distributed computing and data handling. This distributed infrastructure, in turn, depends on

112

A novel decomposition and distributed computing approach for the solution of large scale optimization models  

Science Conference Proceedings (OSTI)

Abstract: Biomass feedstock production is an important component of the biomass based energy sector. Seasonal and distributed collection of low energy density material creates unique challenges, and optimization of the complete value chain is critical ... Keywords: Agent-based modeling, Biomass feedstock, Computation, Decomposition, Optimization

Yogendra Shastri; Alan Hansen; Luis Rodrguez; K. C. Ting

2011-03-01T23:59:59.000Z

113

Proceedings of the 30th annual ACM SIGACT-SIGOPS symposium on Principles of distributed computing  

Science Conference Proceedings (OSTI)

This volume contains 34 extended abstracts and 31 brief announcements selected for the 30th Annual ACM SIGACT-SIGOPS Symposium on Principles of Distributed Computing (PODC), held on June 6-8, 2011, in San Jose, California, USA, as part of the 5th Federated ...

Cyril Gavoille; Pierre Fraigniaud

2011-06-01T23:59:59.000Z

114

A CACHE-BASED DATA INTENSIVE DISTRIBUTED COMPUTING ARCHITECTURE FOR "GRID" APPLICATIONS  

E-Print Network (OSTI)

A CACHE-BASED DATA INTENSIVE DISTRIBUTED COMPUTING ARCHITECTURE FOR "GRID" APPLICATIONS Brian, and are sometimes referred to as the "Data Grid". This paper explores the use of a network data cache in a Data Grid environment. 1. INTRODUCTION High-speed data streams resulting from the operation of on-line instruments

115

Distributed computation of the knn graph for large high-dimensional point sets  

Science Conference Proceedings (OSTI)

High-dimensional problems arising from robot motion planning, biology, data mining, and geographic information systems often require the computation of k nearest neighbor (knn) graphs. The knn graph of a data set is obtained by connecting each point ... Keywords: Approximate nearest neighbors, Distributed and parallel algorithms, Metric spaces, Nearest neighbors, Range queries, Robotics, knn graphs

Erion Plaku; Lydia E. Kavraki

2007-03-01T23:59:59.000Z

116

Multiscale modeling and distributed computing to predict cosmesis outcome after a lumpectomy  

Science Conference Proceedings (OSTI)

Surgery for early stage breast carcinoma is either total mastectomy (complete breast removal) or surgical lumpectomy (only tumor removal). The lumpectomy or partial mastectomy is intended to preserve a breast that satisfies the woman's cosmetic, emotional ... Keywords: Breast cancer, Cellular automata, Distributed computing, Multiscale model

M. Garbey, R. Salmon, D. Thanoon, B. L. Bass

2013-07-01T23:59:59.000Z

117

Research Note: A high performance algorithm for static task scheduling in heterogeneous distributed computing systems  

Science Conference Proceedings (OSTI)

Effective task scheduling is essential for obtaining high performance in heterogeneous distributed computing systems (HeDCSs). However, finding an effective task schedule in HeDCSs requires the consideration of both the heterogeneity of processors and ... Keywords: Directed acyclic graph, Heterogeneous systems, Heuristics, Parallel processing, Task scheduling

Mohammad I. Daoud; Nawwaf Kharma

2008-04-01T23:59:59.000Z

118

Methods and apparatuses for information analysis on shared and distributed computing systems  

DOE Patents (OSTI)

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.

Bohn, Shawn J [Richland, WA; Krishnan, Manoj Kumar [Richland, WA; Cowley, Wendy E [Richland, WA; Nieplocha, Jarek [Richland, WA

2011-02-22T23:59:59.000Z

119

Sieveless particle size distribution analysis of particulate materials through computer vision  

DOE Green Energy (OSTI)

This paper explores the inconsistency of length-based separation by mechanical sieving of particulate materials with standard sieves, which is the standard method of particle size distribution (PSD) analysis. We observed inconsistencies of length-based separation of particles using standard sieves with manual measurements, which showed deviations of 17 22 times. In addition, we have demonstrated the falling through effect of particles cannot be avoided irrespective of the wall thickness of the sieve. We proposed and utilized a computer vision with image processing as an alternative approach; wherein a user-coded Java ImageJ plugin was developed to evaluate PSD based on length of particles. A regular flatbed scanner acquired digital images of particulate material. The plugin determines particles lengths from Feret's diameter and width from pixel-march method, or minor axis, or the minimum dimension of bounding rectangle utilizing the digital images after assessing the particles area and shape (convex or nonconvex). The plugin also included the determination of several significant dimensions and PSD parameters. Test samples utilized were ground biomass obtained from the first thinning and mature stand of southern pine forest residues, oak hard wood, switchgrass, elephant grass, giant miscanthus, wheat straw, as well as Basmati rice. A sieveless PSD analysis method utilized the true separation of all particles into groups based on their distinct length (419 639 particles based on samples studied), with each group truly represented by their exact length. This approach ensured length-based separation without the inconsistencies observed with mechanical sieving. Image based sieve simulation (developed separately) indicated a significant effect (P < 0.05) on number of sieves used in PSD analysis, especially with non-uniform material such as ground biomass, and more than 50 equally spaced sieves were required to match the sieveless all distinct particles PSD analysis. Results substantiate that mechanical sieving, owing to handling limitations and inconsistent length-based separation of particles, is inadequate in determining the PSD of non-uniform particulate samples. The developed computer vision sieveless PSD analysis approach has the potential to replace the standard mechanical sieving. The plugin can be readily extended to model (e.g., Rosin Rammler) the PSD of materials, and mass-based analysis, while providing several advantages such as accuracy, speed, low cost, automated analysis, and reproducible results.

Igathinathane, C. [Mississippi State University (MSU); Pordesimo, L. O. [Mississippi State University (MSU); Columbus, Eugene P [ORNL; Batchelor, William D [ORNL; Sokhansanj, Shahabaddine [ORNL

2009-05-01T23:59:59.000Z

120

A grid-enabled MPI : message passing in heterogeneous distributed computing systems.  

SciTech Connect

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.

Foster, I.; Karonis, N. T.

2000-11-30T23:59:59.000Z

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


121

Groups  

Open Energy Info (EERE)

groups/all/feed en Buildings groups/all/feed en Buildings http://en.openei.org/community/group/buildings Description: This group is dedicated to discussions about green buildings, energy use in buildings, occupant comfort in buildings, and building technologies. The OpenEI Buildings Community Group will be dedicated to discussions, blogs, and postings about new building technologies, green buildings, energy use in buildings, and occupant experience (comfort levels) in green buildings.group/buildings" target="_blank">read more architecture building reviews buildings technology comfort energy use facilities management green building LEED technologies usgbc

122

CHANGES IN SANDSTONE DISTRIBUTIONS BETWEEN THE UPPER, MIDDLE, AND LOWER FAN IN THE ARKANSAS JACKFORK GROUP  

E-Print Network (OSTI)

This study is a statistical analysis of the sandstone distribution within the Arkansas Jackfork Group which is a passive margin fan complex. Passive margin fan systems are typically associated with long fluvial transport, fed by deltas, wide shelf, efficient basin transport, that result in a bypassing system. Passive margin fans are generally fine-grained, mud rich, and well sorted. These fans can be separated into three units (upper, middle, and lower fan) based on their location within the fan and how the sediments are deposited. Five outcrops from the Arkansas Jackfork Group have been chosen for this study and each were divided into different facies dependent on sandstone percentages in certain bed sets. The amount of sandstone for each facies was calculated and a statistical approximation for each outcrop was determined. Sandstone distribution curves were made for each outcrop to show a graphic representation of how the sandstone is dispersed. After analyzing different upper, middle, and lower fan outcrops, it is clear there is an obvious change in the sandstone percentage and distribution. The upper fan deposit has an overall sandstone percentage of approximately 77.5% and is deposited in beds that are mainly amalgamated; 10-30m thick. Sandstone is deposited moderately even and is quite concentrated throughout the exposure. The middle fan outcrops contain approximately 72.6% sandstone and show similar patterns, except that the amalgamated sandstone beds are not as thick, 5-15m and contain more shale in between layers. As expected the lower fan outcrop is completely different in both sandstone percentage and distribution. The lower fan has approximately 65.4% sandstone. The distribution of sandstone is more concentrated in each of the individual units, or systems, but the overall complex has two systems separated by a massive marine shale bed, 33.5 m, that contains virtually no sand.

Mack, Clayton P.

2009-05-01T23:59:59.000Z

123

Time Division Multiplexing of Network Access by Security Groups in High Performance Computing Environments.  

E-Print Network (OSTI)

??It is commonly known that High Performance Computing (HPC) systems are most frequently used by multiple users for batch job, parallel computations. Less well known, (more)

Ferguson, Joshua

2013-01-01T23:59:59.000Z

124

Duration distributions for different softness groups of gamma-ray bursts  

E-Print Network (OSTI)

Gamma-ray bursts (GRBs) are divided into two classes according to their durations. We investigate if the softness of bursts plays a role in the conventional classification of the objects. We employ the BATSE (Burst and Transient Source Experiment) catalog and analyze the duration distributions of different groups of GRBs associated with distinct softness. Our analysis reveals that the conventional classification of GRBs with the duration of bursts is influenced by the softness of the objects. There exits a bimodality in the duration distribution of GRBs for each group of bursts and the time position of the dip in the bimodality histogram shifts with the softness parameter. Our findings suggest that the conventional classification scheme should be modified by separating the two well-known populations in different softness groups, which would be more reasonable than doing so with a single sample. According to the relation between the dip position and the softness parameter, we get an empirical function that can roughly set apart the short-hard and long-soft bursts: $SP = (0.100 \\pm 0.028) T_{90}^{-(0.85 \\pm 0.18)}$, where $SP$ is the softness parameter adopted in this paper.

Y. -P. Qin; A. C. Gupta; J. H. Fan; C. -Y. Su; R. -J. Lu

2010-10-07T23:59:59.000Z

125

A hardware and software computational platform for the HiPerDNO (high performance distribution network operation) project  

Science Conference Proceedings (OSTI)

The HiPerDNO project aims to develop new applications to enhance the operational capabilities of Distribution Network Operators (DNO). Their delivery requires an advanced computational strategy. This paper describes a High Performance Computing (HPC) ... Keywords: high performance computing applications, smart grid, systems design

Stefano Salvini; Piotr Lopatka; David Wallom

2011-11-01T23:59:59.000Z

126

Studies of electron collisions with polyatomic molecules using distributed-memory parallel computers  

SciTech Connect

Elastic electron scattering cross sections from 5--30 eV are reported for the molecules C{sub 2}H{sub 4}, C{sub 2}H{sub 6}, C{sub 3}H{sub 8}, Si{sub 2}H{sub 6}, and GeH{sub 4}, obtained using an implementation of the Schwinger multichannel method for distributed-memory parallel computer architectures. These results, obtained within the static-exchange approximation, are in generally good agreement with the available experimental data. These calculations demonstrate the potential of highly parallel computation in the study of collisions between low-energy electrons and polyatomic gases. The computational methodology discussed is also directly applicable to the calculation of elastic cross sections at higher levels of approximation (target polarization) and of electronic excitation cross sections.

Winstead, C.; Hipes, P.G.; Lima, M.A.P.; McKoy, V. (A. A. Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125 (US))

1991-04-15T23:59:59.000Z

127

A distributed computing environment with support for constraint-based task scheduling and scientific experimentation  

SciTech Connect

This paper describes a computing environment which supports computer-based scientific research work. Key features include support for automatic distributed scheduling and execution and computer-based scientific experimentation. A new flexible and extensible scheduling technique that is responsive to a user`s scheduling constraints, such as the ordering of program results and the specification of task assignments and processor utilization levels, is presented. An easy-to-use constraint language for specifying scheduling constraints, based on the relational database query language SQL, is described along with a search-based algorithm for fulfilling these constraints. A set of performance studies show that the environment can schedule and execute program graphs on a network of workstations as the user requests. A method for automatically generating computer-based scientific experiments is described. Experiments provide a concise method of specifying a large collection of parameterized program executions. The environment achieved significant speedups when executing experiments; for a large collection of scientific experiments an average speedup of 3.4 on an average of 5.5 scheduled processors was obtained.

Ahrens, J.P.; Shapiro, L.G.; Tanimoto, S.L. [Univ. of Washington, Seattle, WA (United States). Dept. of Computer Science and Engineering

1997-04-01T23:59:59.000Z

128

Chemical Forms and Distribution of Platinum Group Metals and Technetium During Spent Fuel Reprocessing  

SciTech Connect

Amongst the fission products present in spent nuclear fuel of Nuclear Power Plants there are considerable quantities of platinum group metals (PGMs): ruthenium, rhodium and palladium. At the same time there are considerable amounts of technetium in the spent fuel, the problem of its removal at radiochemical plants being in operation encountering serious difficulties. Increased interest in this radionuclides is due not only to its rather large yield, but to higher mobility in the environment as well. However, the peculiarities of technetium chemistry in nitric acid solutions create certain problems when trying to separate it as a single product in the course of NPP's spent fuel reprocessing. The object of this work was to conduct a comprehensive analysis of platinum group metals and technetium behavior at various stages of spent fuel reprocessing and to seek the decisions which could make it possible to separate its as a single product. The paper will report data on platinum metals (PGM) and technetium distribution in spent fuel reprocessing products. The description of various techniques for palladium recovery from differing in composition radioactive solutions arising from reprocessing is given. (authors)

Pokhitonov, Y. [V.G. Khlopin Radium Institute, St. Petersburg (Russian Federation)

2007-07-01T23:59:59.000Z

129

Packet-switched intercommunication network for distributed memory, parallel processor computers  

DOE Patents (OSTI)

The Lambda network is a single stage, packet-switched interprocessor communication network for a distributed memory, parallel processor computer. Its design arises from the desired network characteristics of minimizing mean and maximum packet transfer time, local routing, expandability, deadlock avoidance, and fault tolerance. The network is based on fixed degree nodes and has O(log[sub 2n]) mean and maximum packet transfer distances where n is the number of processors. The routing method is detailed, as are methods for expandability, deadlock avoidance, and fault tolerance.

Napolitano, L.M. Jr.

1990-01-01T23:59:59.000Z

130

Packet-switched intercommunication network for distributed memory, parallel processor computers  

DOE Patents (OSTI)

The Lambda network is a single stage, packet-switched interprocessor communication network for a distributed memory, parallel processor computer. Its design arises from the desired network characteristics of minimizing mean and maximum packet transfer time, local routing, expandability, deadlock avoidance, and fault tolerance. The network is based on fixed degree nodes and has O(log{sub 2n}) mean and maximum packet transfer distances where n is the number of processors. The routing method is detailed, as are methods for expandability, deadlock avoidance, and fault tolerance.

Napolitano, L.M. Jr.

1990-12-31T23:59:59.000Z

131

Using Java for distributed computing in the Gaia satellite data processing  

E-Print Network (OSTI)

In recent years Java has matured to a stable easy-to-use language with the flexibility of an interpreter (for reflection etc.) but the performance and type checking of a compiled language. When we started using Java for astronomical applications around 1999 they were the first of their kind in astronomy. Now a great deal of astronomy software is written in Java as are many business applications. We discuss the current environment and trends concerning the language and present an actual example of scientific use of Java for high-performance distributed computing: ESA's mission Gaia. The Gaia scanning satellite will perform a galactic census of about 1000 million objects in our galaxy. The Gaia community has chosen to write its processing software in Java. We explore the manifold reasons for choosing Java for this large science collaboration. Gaia processing is numerically complex but highly distributable, some parts being embarrassingly parallel. We describe the Gaia processing architecture and its realisation...

O'Mullane, William; Parsons, Paul; Lammers, Uwe; Hoar, John; Hernandez, Jose

2011-01-01T23:59:59.000Z

132

884 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 52, NO. 4, AUGUST 2005 Distributed Computing Grid Experiences in CMS  

E-Print Network (OSTI)

884 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 52, NO. 4, AUGUST 2005 Distributed Computing Grid is with National University of Science and Technology, Pakistan (e-mail: Ashiq.Anjum@cern.ch). T. Barrass, S

Low, Steven H.

133

Report of the Snowmass 2013 Computing Frontier working group on Lattice Field Theory -- Lattice field theory for the energy and intensity frontiers: Scientific goals and computing needs  

E-Print Network (OSTI)

This is the report of the Computing Frontier working group on Lattice Field Theory prepared for the proceedings of the 2013 Community Summer Study ("Snowmass"). We present the future computing needs and plans of the U.S. lattice gauge theory community and argue that continued support of the U.S. (and worldwide) lattice-QCD effort is essential to fully capitalize on the enormous investment in the high-energy physics experimental program. We first summarize the dramatic progress of numerical lattice-QCD simulations in the past decade, with some emphasis on calculations carried out under the auspices of the U.S. Lattice-QCD Collaboration, and describe a broad program of lattice-QCD calculations that will be relevant for future experiments at the intensity and energy frontiers. We then present details of the computational hardware and software resources needed to undertake these calculations.

Blum, T; Holmgren, D; Brower, R; Catterall, S; Christ, N; Kronfeld, A; Kuti, J; Mackenzie, P; Neil, E T; Sharpe, S R; Sugar, R

2013-01-01T23:59:59.000Z

134

Report of the Snowmass 2013 Computing Frontier working group on Lattice Field Theory -- Lattice field theory for the energy and intensity frontiers: Scientific goals and computing needs  

E-Print Network (OSTI)

This is the report of the Computing Frontier working group on Lattice Field Theory prepared for the proceedings of the 2013 Community Summer Study ("Snowmass"). We present the future computing needs and plans of the U.S. lattice gauge theory community and argue that continued support of the U.S. (and worldwide) lattice-QCD effort is essential to fully capitalize on the enormous investment in the high-energy physics experimental program. We first summarize the dramatic progress of numerical lattice-QCD simulations in the past decade, with some emphasis on calculations carried out under the auspices of the U.S. Lattice-QCD Collaboration, and describe a broad program of lattice-QCD calculations that will be relevant for future experiments at the intensity and energy frontiers. We then present details of the computational hardware and software resources needed to undertake these calculations.

T. Blum; R. S. Van de Water; D. Holmgren; R. Brower; S. Catterall; N. Christ; A. Kronfeld; J. Kuti; P. Mackenzie; E. T. Neil; S. R. Sharpe; R. Sugar

2013-10-23T23:59:59.000Z

135

PROCEEDINGS OF FOURTH BERKELEY CONFERENCE ON DISTRIBUTED DATA MANAGEMENT AND COMPUTER NETWORKS.  

E-Print Network (OSTI)

packet switching for local computer networks. Comm. of theaddressing capabilities for computer networks. Proe. IEEE,InternatIonal Conference on,Computer CommunIcatIon, August

Hall, Dennis

2011-01-01T23:59:59.000Z

136

2011 DoD High Performance Computing Modernization Program Users Group Conference A Web-based High-Throughput Tool for Next-Generation Sequence Annotation  

E-Print Network (OSTI)

320 2011 DoD High Performance Computing Modernization Program Users Group Conference A Web deployed on the Mana Linux cluster at the Maui High Performance Computing Center. The two components

137

Integrated Computing, Communication, and Distributed Control of Deregulated Electric Power Systems  

SciTech Connect

Restructuring of the electricity market has affected all aspects of the power industry from generation to transmission, distribution, and consumption. Transmission circuits, in particular, are stressed often exceeding their stability limits because of the difficulty in building new transmission lines due to environmental concerns and financial risk. Deregulation has resulted in the need for tighter control strategies to maintain reliability even in the event of considerable structural changes, such as loss of a large generating unit or a transmission line, and changes in loading conditions due to the continuously varying power consumption. Our research efforts under the DOE EPSCoR Grant focused on Integrated Computing, Communication and Distributed Control of Deregulated Electric Power Systems. This research is applicable to operating and controlling modern electric energy systems. The controls developed by APERC provide for a more efficient, economical, reliable, and secure operation of these systems. Under this program, we developed distributed control algorithms suitable for large-scale geographically dispersed power systems and also economic tools to evaluate their effectiveness and impact on power markets. Progress was made in the development of distributed intelligent control agents for reliable and automated operation of integrated electric power systems. The methodologies employed combine information technology, control and communication, agent technology, and power systems engineering in the development of intelligent control agents for reliable and automated operation of integrated electric power systems. In the event of scheduled load changes or unforeseen disturbances, the power system is expected to minimize the effects and costs of disturbances and to maintain critical infrastructure operational.

Bajura, Richard; Feliachi, Ali

2008-09-24T23:59:59.000Z

138

Enhanced input/output architecture for toroidally-connected distributed-memory parallel computers  

SciTech Connect

This patent describes an improvement in a toroidally-connected distributed-memory parallel computer having rows and columns of processors, wherein each processor has an independent memory and is connected to four neighboring processors. It comprises: at least one common I/O channel; a buffering mechanisms, each being connected to such I/O channel and to only one corresponding processor in a given row of processors; and each such processor of the given row being connected to only one corresponding buffer mechanism in such a manner that it can access its buffer mechanism independently of the access top such buffer mechanism by the I/O channel, and independently of access to the buffer mechanisms corresponding to other processors in the given row.

Cok, R.S.

1990-07-17T23:59:59.000Z

139

Voices of victory: a computational focus group framework for tracking opinion shift in real time  

Science Conference Proceedings (OSTI)

Social media have been employed to assess public opinions on events, markets, and policies. Most current work focuses on either developing aggregated measures or opinion extraction methods like sentiment analysis. These approaches suffer from unpredictable ... Keywords: computational social science, data-driven journalism, process inference, public opinion, real time system, social meter

Yu-Ru Lin, Drew Margolin, Brian Keegan, David Lazer

2013-05-01T23:59:59.000Z

140

Efficient implementation of a multidimensional fast fourier transform on a distributed-memory parallel multi-node computer  

DOE Patents (OSTI)

The present in invention is directed to a method, system and program storage device for efficiently implementing a multidimensional Fast Fourier Transform (FFT) of a multidimensional array comprising a plurality of elements initially distributed in a multi-node computer system comprising a plurality of nodes in communication over a network, comprising: distributing the plurality of elements of the array in a first dimension across the plurality of nodes of the computer system over the network to facilitate a first one-dimensional FFT; performing the first one-dimensional FFT on the elements of the array distributed at each node in the first dimension; re-distributing the one-dimensional FFT-transformed elements at each node in a second dimension via "all-to-all" distribution in random order across other nodes of the computer system over the network; and performing a second one-dimensional FFT on elements of the array re-distributed at each node in the second dimension, wherein the random order facilitates efficient utilization of the network thereby efficiently implementing the multidimensional FFT. The "all-to-all" re-distribution of array elements is further efficiently implemented in applications other than the multidimensional FFT on the distributed-memory parallel supercomputer.

Bhanot, Gyan V. (Princeton, NJ); Chen, Dong (Croton-On-Hudson, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)

2008-01-01T23:59:59.000Z

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


141

PROCEEDINGS OF THE THIRD BERKELEY WORKSHOP ON DISTRIBUTED DATA MANAGEMENT AND COMPUTER NETWORKS  

E-Print Network (OSTI)

machine of the CYCLADES Computer network", IFIP Congress,End Encryption in Secure Computer Networks". USAF ElectronicTechn. Rpt. CCA-77-09, Computer Corp. of America, (Dec.

Authors, Various

2011-01-01T23:59:59.000Z

142

Computer resources Computer resources  

E-Print Network (OSTI)

Computer resources 1 Computer resources available to the LEAD group Cédric David 30 September 2009 #12;Ouline · UT computer resources and services · JSG computer resources and services · LEAD computers· LEAD computers 2 #12;UT Austin services UT EID and Password 3 https://utdirect.utexas.edu #12;UT Austin

Yang, Zong-Liang

143

c 2011 Taylor and Francis Group, LLC In the context of human history, computers are a fairly recent invention. But the idea  

E-Print Network (OSTI)

c 2011 Taylor and Francis Group, LLC Preface In the context of human history, computers are a fairly recent invention. But the idea of computation--of solving a complex problem by repeated and their relationships, and developed computational methods that are still used today. In post- Renaissance Europe

Oregon, University of

144

On performance of group key distribution techniques when applied to IPTV services  

Science Conference Proceedings (OSTI)

IPTV services consist of multiple video channels grouped in bundles, such as sports, movies or generic bundles; users typically subscribe multiple bundles, including the generic bundle. Secure IP multicast can be used to implement IPTV services, but ... Keywords: Admission control, IPTV, Multicast, Security, User groups

Antnio Pinto; Manuel Ricardo

2011-09-01T23:59:59.000Z

145

Analysis, Tuning and Comparison of Two General Sparse Solvers for Distributed Memory Computers  

E-Print Network (OSTI)

We describe the work performed in the context of a Franco-Berkeley funded project between NERSC-LBNL located in Berkeley (USA) and CERFACS-ENSEEIHT located in Toulouse (France). We discuss both the tuning and performance analysis of two distributed memory sparse solvers (SuperLU from Berkeley and MUMPS from Toulouse) on the 512 processor Cray T3E from NERSC (Lawrence Berkeley National Laboratory). This project gave us the opportunity to improve the algorithms and add new features to the codes. We then quite extensively analyse and compare the two approaches on a set of large problems from real applications. We further explain the main differences in the behaviour of the approaches on artificial regular grid problems. As a conclusion to this activity report, we mention a set of parallel sparse solvers on which this type of study should be extended. Keywords: sparse linear systems, distributed memory codes, multifrontal, supernodal, direct methods, comparison of codes. AMS(MOS) subject classifications: 65F05, 65F50. 1 Current reports available at http://www.cerfacs.fr/algor/algo reports.html. The project was supported by the France-Berkeley Fund. This project also utilized resources of the National Energy Research Scientific Computing Center (NERSC) under contract number DE-AC03-76SF00098. 2 amestoy@enseeiht.fr. ENSEEIHT-IRIT, 2 rue Camichel, 31071 Toulouse, France. Much of the work done while a visitor at NERSC. 3 duff@cerfacs.fr. Also at Atlas Centre, RAL, Oxon OX11 0QX, England. 4 jeanyves@nag.co.uk. NAg Ltd, Wilkinson House, Oxford OX2 8DR, England. 5 xiaoye@nersc.gov. NERSC, Lawrence Berkeley National Lab, MS 50F, 1 Cyclotron Rd., Berkeley, CA 94720. The research of this author was supported in part by the National Science Foundation Cooperative Agreement...

Patrick R. Amestoy; Iain S. Duff; Jean-Yves L' Excellent; Xiaoye S. Li

2000-01-01T23:59:59.000Z

146

Privacy and Security Research Group workshop on network and distributed system security: Proceedings  

Science Conference Proceedings (OSTI)

This report contains papers on the following topics: NREN Security Issues: Policies and Technologies; Layer Wars: Protect the Internet with Network Layer Security; Electronic Commission Management; Workflow 2000 - Electronic Document Authorization in Practice; Security Issues of a UNIX PEM Implementation; Implementing Privacy Enhanced Mail on VMS; Distributed Public Key Certificate Management; Protecting the Integrity of Privacy-enhanced Electronic Mail; Practical Authorization in Large Heterogeneous Distributed Systems; Security Issues in the Truffles File System; Issues surrounding the use of Cryptographic Algorithms and Smart Card Applications; Smart Card Augmentation of Kerberos; and An Overview of the Advanced Smart Card Access Control System. Selected papers were processed separately for inclusion in the Energy Science and Technology Database.

Not Available

1993-05-01T23:59:59.000Z

147

Distributed digital processing and closed loop computer control of wastewater treatment  

Science Conference Proceedings (OSTI)

The application of digital computer control to municipal wastewater treatment processes is steadily gaining popularity. Within the next few years this mode of control is expected to become a standard feature of larger wastewater treatment plants. The ... Keywords: Closed loop systems, PID control, computer application, computer control, digital control, direct digital control, ecology, feedback, feedforward, water pollution

Bipin Mishra

1980-01-01T23:59:59.000Z

148

--Curriculum Initiative on Parallel and Distributed Computing at the University of Western Ontario --  

E-Print Network (OSTI)

This poster describes the integration of high-performance computing courses in the undergraduate curriculum of our curriculum that the democratization of High Performance Computing (HPC) requires. Integration for the first time this academic year. CS 2101 ­ Foundations of Programming for High Performance Computing

Moreno Maza, Marc

149

Computing  

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

Computing Computing and Storage Requirements Computing and Storage Requirements for FES J. Candy General Atomics, San Diego, CA Presented at DOE Technical Program Review Hilton Washington DC/Rockville Rockville, MD 19-20 March 2013 2 Computing and Storage Requirements Drift waves and tokamak plasma turbulence Role in the context of fusion research * Plasma performance: In tokamak plasmas, performance is limited by turbulent radial transport of both energy and particles. * Gradient-driven: This turbulent transport is caused by drift-wave instabilities, driven by free energy in plasma temperature and density gradients. * Unavoidable: These instabilities will persist in a reactor. * Various types (asymptotic theory): ITG, TIM, TEM, ETG . . . + Electromagnetic variants (AITG, etc). 3 Computing and Storage Requirements Fokker-Planck Theory of Plasma Transport Basic equation still

150

Optimal Well-Group Distribution of a Groundwater Source Heat Pump System  

E-Print Network (OSTI)

It is critical to determine how the well group arranges for application of the GWSHP system. Based on the fact that water movement is the most important factor influencing heat transfer in an aquifer, this paper presents a two-step analysis method and analyzes the inter-well thermal transfixion method as follows. First, we forecast the least influence radius through calculating the thermal diffusion function of aquifer. Then, we perform an analysis on the inter-well thermal transfixion, using the streamline analysis method and doing a quantitative analysis of the effects that inter-well distance and flux have on it. We discuss the well group arrangement and puts forward optimal scheme by means of the thermal diffusion and streamline simulation.

Liu, Z.; Lu, L.; Yoshida, H.

2006-01-01T23:59:59.000Z

151

The Well-Group Distribution of Groundwater Source Heat Pump System Optimized Research  

E-Print Network (OSTI)

It is the key question that how does the well group arrange for application of GWSHP system. Based on the fact that the water movement is the important factor of heat transfer on aquifer, this paper presents two steps analysis method and analyze the inter-well thermal transfixion, method as follows: (1) Forecast the least influence radius through calculating the thermal diffusion function of aquifer; (2) The analysis on the inter-well thermal transfixion makes use of the streamline analysis method and makes quantitative analysis of the effect that inter-well distance and flux make on it. It labors the well group arrangement and puts forward optimal scheme by means of the thermal diffusion and streamline simulation.

Liu, Z.; Lu, L.; Yoshida, H.

2006-01-01T23:59:59.000Z

152

TIME DISTRIBUTIONS OF LARGE AND SMALL SUNSPOT GROUPS OVER FOUR SOLAR CYCLES  

SciTech Connect

Here we analyze solar activity by focusing on time variations of the number of sunspot groups (SGs) as a function of their modified Zurich class. We analyzed data for solar cycles 20-23 by using Rome (cycles 20 and 21) and Learmonth Solar Observatory (cycles 22 and 23) SG numbers. All SGs recorded during these time intervals were separated into two groups. The first group includes small SGs (A, B, C, H, and J classes by Zurich classification), and the second group consists of large SGs (D, E, F, and G classes). We then calculated small and large SG numbers from their daily mean numbers as observed on the solar disk during a given month. We report that the time variations of small and large SG numbers are asymmetric except for solar cycle 22. In general, large SG numbers appear to reach their maximum in the middle of the solar cycle (phases 0.45-0.5), while the international sunspot numbers and the small SG numbers generally peak much earlier (solar cycle phases 0.29-0.35). Moreover, the 10.7 cm solar radio flux, the facular area, and the maximum coronal mass ejection speed show better agreement with the large SG numbers than they do with the small SG numbers. Our results suggest that the large SG numbers are more likely to shed light on solar activity and its geophysical implications. Our findings may also influence our understanding of long-term variations of the total solar irradiance, which is thought to be an important factor in the Sun-Earth climate relationship.

Kilcik, A.; Yurchyshyn, V. B.; Abramenko, V.; Goode, P. R.; Cao, W. [Big Bear Solar Observatory, Big Bear City, CA 92314 (United States); Ozguc, A. [Kandilli Observatory and Earthquake Research Institute, Bogazici University, 34684 Istanbul (Turkey); Rozelot, J. P. [Nice University, OCA-Fizeau Dpt. Av. Copernic, 06130 Grasse (France)

2011-04-10T23:59:59.000Z

153

Proceedings of the IASTED International Conference Parallel and Distributed Computing and Systems  

E-Print Network (OSTI)

Distribution and Load-Balancing Techniques for Adaptive Grid Hierarchies Mausumi Shee, Samip Bhavsar characterization and evaluation of dynamic partitioning and load-balancing techniques for distributed adaptive grid-balancing techniques for distributed adaptive grid hierarchies that underlie parallel adaptive mesh- refinement (AMR

Parashar, Manish

154

GrenchMark: A Framework for Testing Large-Scale Distributed Computing Systems Alexandru Iosup (Delft University of Technology, The Netherlands)  

E-Print Network (OSTI)

computing - Computing as utility (similar to electricity) - Small components, distributed cost of ownership://grenchmark.st.ewi.tudelft.nlgrenchmark.st.ewi.tudelft.nl// The GrenchMark framework for testing large-scale distributed systems Testing Multi-Cluster Grids · Generate and annotation data · Tested in grids, peer-to-peer systems, and heterogeneous clusters - Extensible reference

Iosup, Alexandru

155

MINT: a Computer Program for Adaptive Monte Carlo Integration and Generation of Unweighted Distributions  

E-Print Network (OSTI)

In this note I illustrate the program MINT, a FORTRAN program for Monte Carlo adaptive integration and generation of unweighted distributions.

Nason, P

2007-01-01T23:59:59.000Z

156

MINT: a Computer Program for Adaptive Monte Carlo Integration and Generation of Unweighted Distributions  

E-Print Network (OSTI)

In this note I illustrate the program MINT, a FORTRAN program for Monte Carlo adaptive integration and generation of unweighted distributions.

P. Nason

2007-09-13T23:59:59.000Z

157

An object-oriented framework for distributed computational simulation of aerospace propulsion systems  

Science Conference Proceedings (OSTI)

Designing and developing new aerospace propulsion systems is time-consuming and expensive. Computational simulation is a promising means for alleviating this cost, but requires a flexible software simulation system capable of integrating advanced multidisciplinary ...

John A. Reed; Abdollah A. Afjeh

1998-04-01T23:59:59.000Z

158

Sieveless particle size distribution analysis of particulate materials through computer vision  

Science Conference Proceedings (OSTI)

This paper explores the inconsistency of ''length-based separation'' by mechanical sieving of particulate materials with standard sieves, which is the standard method of particle size distribution (PSD) analysis. We observed inconsistencies of length-based ... Keywords: Biomass sieve analysis, Dimension, Image processing, ImageJ plugin, Particle size distribution, Physical property

C. Igathinathane; L. O. Pordesimo; E. P. Columbus; W. D. Batchelor; S. Sokhansanj

2009-05-01T23:59:59.000Z

159

The Modification of Joint Size-Charge Distribution in Rain. Part II: Computations Involving Partial Coalescence  

Science Conference Proceedings (OSTI)

Raindrop collisional breakup is included in a model of joint size-charge distribution development. Consistent with experimental observations the model includes a finite filament (joining separating drops) that upon rupture produces charged ...

S. G. Bradley; C. D. Stow

1984-10-01T23:59:59.000Z

160

A Theoretical Method for Computing Vertical Distributions of Acidity and Sulfate Production within Cumulus Clouds  

Science Conference Proceedings (OSTI)

An aqueous chemistry model has been combined with an entraining cumulus cloud model to predict vertical distributions of pH (=?log10[H+]) within a cloud. The cloud model predicts vertical variations of temperature, pressure, entrainment and ...

Chris J. Walcek; Gregory R. Taylor

1986-02-01T23:59:59.000Z

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


161

Shared Data Spaces for Distributed Computing and Parallelism in Scientific Visualization Systems  

E-Print Network (OSTI)

this paper reviews the architecture principles of some visualization systems from the family of so-called application builders, focusing on their ability to be run in distributed environments. In a second part some points concerning the efficiency of distributed execution, and strategies for executing on parallel systems are discussed. Finally the main lines of a basic layer for handling data sharing and processes synchronisation, presently developed at ONERA, are presented. 1. Introduction

Michel Grave

1994-01-01T23:59:59.000Z

162

Applied and Computational Mathematics Division  

Science Conference Proceedings (OSTI)

... Computing and Communications Theory Group; High Performance Computing and Visualization Group. Staff Directory. Employment ...

2013-05-09T23:59:59.000Z

163

DAGuE: A generic distributed DAG engine for High Performance Computing  

Science Conference Proceedings (OSTI)

The frenetic development of the current architectures places a strain on the current state-of-the-art programming environments. Harnessing the full potential of such architectures is a tremendous task for the whole scientific computing community. We ... Keywords: Architecture aware scheduling, HPC, Heterogeneous architectures, Micro-task DAG

George Bosilca; Aurelien Bouteiller; Anthony Danalis; Thomas Herault; Pierre Lemarinier; Jack Dongarra

2012-01-01T23:59:59.000Z

164

System and method for secure group transactions  

DOE Patents (OSTI)

A method and a secure system, processing on one or more computers, provides a way to control a group transaction. The invention uses group consensus access control and multiple distributed secure agents in a network environment. Each secure agent can organize with the other secure agents to form a secure distributed agent collective.

Goldsmith, Steven Y. (Rochester, MN)

2006-04-25T23:59:59.000Z

165

Proceedings of the sixth Berkeley workshop on distributed data management and computer networks  

SciTech Connect

A distributed data base management system allows data to be stored at multiple locations and to be accessed as a single unified data base. In this workshop, seventeen papers were presented which have been prepared separately for the energy data base. These items deal with data transfer, protocols and management. (GHT)

Various Authors

1982-01-01T23:59:59.000Z

166

Optimising context data dissemination and storage in distributed pervasive computing systems  

Science Conference Proceedings (OSTI)

Context management systems are expected to administrate large volumes of spatial and non-spatial information in geographical disperse domains. In particular, when these systems cover wide areas such as cities, countries or even the entire planet, the ... Keywords: Context Distributed Database Management System, Context management & query languages, Context replication, Mobile physical object handling, Selective context data dissemination

Ioanna Roussaki; Maria Strimpakou; Carsten Pils; Nikos Kalatzis; Nicolas Liampotis

2010-04-01T23:59:59.000Z

167

Composition of engineering web services with distributed data-flows and computations  

Science Conference Proceedings (OSTI)

This paper describes an experimental Flow-based Infrastructure for Composing Autonomous Services (FICAS), which supports a service-composition paradigm that integrates loosely coupled software components. For traditional software service composition ... Keywords: Active mediation, Distributed data-flow, Engineering web services, Mobile class, Project management, Service integration

David Liu; Jun Peng; Kincho H. Law; Gio Wiederhold; Ram D. Sriram

2005-01-01T23:59:59.000Z

168

Computers and Computer Networks  

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

and Computer Networks and Computer Networks Computer Science documentation, etc. Computer Science Research and Services at the Lab Super Computing Computer Graphics Computer & Internet information via yahoo.com, categorized by subject Perl UNIX documentation Shareware sites MBONE and Videoconferencing Computer Networks and related documentation Computer Documentation World Wide Web UNIX Documentation TeX, LaTeX FAQ, documents, archives, etc. MacInTouch -- current Macintosh information, from vendor & others Shareware sites The Free On-line Dictionary of Computing PDS: The Performance Database Server of Computer Benchmark Return to Top Return to Top Newsgroups, USEnet, and Mailing Lists Usenet (Internet News Groups) Mailing list software & information Return to Top Return to Top

169

DualTrust: A Distributed Trust Model for Swarm-Based Autonomic Computing Systems  

SciTech Connect

For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, trust management is important for the acceptance of the mobile agent sensors and to protect the system from malicious behavior by insiders and entities that have penetrated network defenses. This paper examines the trust relationships, evidence, and decisions in a representative system 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. We then propose the DualTrust conceptual trust model. By addressing the autonomic managers bi-directional primary relationships in the ACS architecture, DualTrust is able to monitor the trustworthiness of the autonomic managers, protect the sensor swarm in a scalable manner, and provide global trust awareness for the orchestrating autonomic manager.

Maiden, Wendy M.; Dionysiou, Ioanna; Frincke, Deborah A.; Fink, Glenn A.; Bakken, David E.

2011-02-01T23:59:59.000Z

170

A collaborative and integrated platform to support distributed manufacturing system using a service-oriented approach based on cloud computing paradigm  

Science Conference Proceedings (OSTI)

Today's manufacturing enterprises struggle to adopt cost-effective manufacturing systems. Overview of the recent manufacturing enterprises shows that successful global manufacturing enterprises have distributed their manufacturing capabilities over the ... Keywords: Cloud computing, Collaborative product development, Distributed product development, Modularity, STEP standard, Service-oriented manufacturing, XML

Omid Fatahi Valilai; Mahmoud Houshmand

2013-02-01T23:59:59.000Z

171

Quantitative discrimination between geological materials with variable density contrast by high resolution X-ray computed tomography: An example using amygdule size-distribution in ancient lava flows  

Science Conference Proceedings (OSTI)

The bubble-size distribution in 2.7 billion year old lava flows can be used as a proof of concept illustrating a new set of techniques for measuring volumes of geological materials with variable density contrasts using high-resolution X-ray computed ... Keywords: Amygdules, Bootstrap resampling, Bubble-size distribution, Central limit theorem, Dynamic thresholding, X-ray tomography

Sanjoy M. Som, James W. Hagadorn, Weston A. Thelen, Alan R. Gillespie, David C. Catling, Roger Buick

2013-04-01T23:59:59.000Z

172

Analysis, tuning and comparison of two general sparse solvers for distributed memory computers  

Science Conference Proceedings (OSTI)

We describe the work performed in the context of a Franco-Berkeley funded project between NERSC-LBNL located in Berkeley (USA) and CERFACS-ENSEEIHT located in Toulouse (France). We discuss both the tuning and performance analysis of two distributed memory sparse solvers (superlu from Berkeley and mumps from Toulouse) on the 512 processor Cray T3E from NERSC (Lawrence Berkeley National Laboratory). This project gave us the opportunity to improve the algorithms and add new features to the codes. We then quite extensively analyze and compare the two approaches on a set of large problems from real applications. We further explain the main differences in the behavior of the approaches on artificial regular grid problems. As a conclusion to this activity report, we mention a set of parallel sparse solvers on which this type of study should be extended.

Amestoy, P.R.; Duff, I.S.; L'Excellent, J.-Y.; Li, X.S.

2000-06-30T23:59:59.000Z

173

Computational Computational  

E-Print Network (OSTI)

38 Computational complexity Computational complexity In 1965, the year Juris Hartmanis became Chair On the computational complexity of algorithms in the Transactions of the American Mathematical Society. The paper the best talent to the field. Theoretical computer science was immediately broadened from automata theory

Keinan, Alon

174

ANALOG COMPUTATION OF TEMPERATURE DISTRIBUTION IN SOLIDS WITH ELECTRICAL HEAT-GENERATION AND TEMPERATURE-DEPENDENT PROPERTIES  

SciTech Connect

A problem which frequently arises in experimentai heat transfer work is that of determining the surface temperature of a tube in which heat is generated electrically. Solution of this problem involves a temperature measurement of the opposite surface to which a correction factor, the temperature drop through the tube wall, must be applied. This temperature drop is obtnined through the solution of the diffurential equation governing the temperature distribution in the tube wall; however, in the case of temperature-dependent properties of thermal conductivity and electrical resistivity, the governing equation is nonlinear, which necessitates special solutions. In this study a hypothetical surface-temperature problem was established, and the solution of the governing nonlinear differential equation was accomplished by means of an electronic analog computer. Assuming variable properties, the example used in this study was that of a one-dimensional steadystate heat flow through both a thick- and a thin- walled tube. (auth)

Harden, D.G.; Bryant, L.T.

1962-11-01T23:59:59.000Z

175

Distribution:  

Office of Legacy Management (LM)

JAN26 19% JAN26 19% Distribution: OR00 Attn: h.H.M.Roth DFMusser ITMM MMMann INS JCRyan FIw(2) Hsixele SRGustavson, Document rocm Formal file i+a@mmm bav@ ~@esiaw*cp Suppl. file 'Br & Div rf's s/health (lic.only) UNITED STATES ATOMIC ENERGY COMMISSION SPECIAL NUCLEAB MATERIAL LICENSE pursuant to the Atomic Energy Act of 1954 and Title 10, Code of Federal Regulations, Chapter 1, P&t 70, "Special Nuclear Material Reg)llatiqm," a license is hereby issued a$hortztng the licensee to rekeive and possess the special nuclear material designated below; to use such special nuclear mat&ial for the purpose(s) and at the place(s) designated below; and to transfer such material to per&s authorized to receive it in accordance with the regula,tions in said Part.

176

Homepage: Computer, Computational, and Statistical Sciences,...  

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

ADTSC Computer, Computational, & Statistical Sciences, CCS Home Internal Home About Us Organization Jobs CCS Home Groups Computational Physics & Methods CCS-2 Information Sciences...

177

Center Information Innovative Computing Laboratory  

E-Print Network (OSTI)

of Tennessee as a world leader in advanced scientific and high performance computing through research Computing Distributed Computing is an integral part of the high performance computing landscape

Tennessee, University of

178

Computer Science Research: Computation Directorate  

Science Conference Proceedings (OSTI)

This report contains short papers in the following areas: large-scale scientific computation; parallel computing; general-purpose numerical algorithms; distributed operating systems and networks; knowledge-based systems; and technology information systems.

Durst, M.J. (ed.); Grupe, K.F. (ed.)

1988-01-01T23:59:59.000Z

179

Agenda for the Derived Liquids to Hydrogen Distributed Reforming Working Group (BILIWG) Hydrogen Production Technical Team Research Review  

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

& Hydrogen Production Technical Team Research Review Agenda for Tuesday, November 6, 2007 Location: BCS Incorporated, 8929 Stephens Road, Laurel, MD. 20723 410-997-7778 8:30 - 9:00 Continental Breakfast 9:00 DOE Targets, Tools and Technology o Bio-Derived Liquids to Hydrogen Distributed Reforming Targets DOE, Arlene Anderson o H2A Overview, NREL, Darlene Steward o Bio-Derived Liquids to Hydrogen Distributed Reforming Cost Analysis DTI, Brian James 10:00 Research Review o Low-Cost Hydrogen Distributed Production Systems, H2Gen, Sandy Thomas o Integrated Short Contact Time Hydrogen Generator, GE Global Research, Wei Wei o Distributed Bio-Oil Reforming, NREL, Darlene Steward o High Pressure Steam Ethanol Reforming, ANL, Romesh Kumar

180

An autonomy-oriented computing mechanism for modeling the formation of energy distribution networks: crude oil distribution in U.S. and Canada  

Science Conference Proceedings (OSTI)

An efficient, economical, as well as reliable energy distribution system plays important roles in distributing energy resources from energy suppliers to energy consumers in different regions. In this paper, we present a decentralized self-organized mechanism ...

Benyun Shi; Jiming Liu

2010-09-01T23:59:59.000Z

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


181

Distributed computational fluid dynamics  

E-Print Network (OSTI)

that arises in these practical turbulent combustion pro- cesses is a strong coupling between turbulence, chemical kinetics and heat release. These interactions are generally three dimensional and time de- pendent, and are not easily accessible to experimental... and at university and national level by very large massively-parallel supercomputers. Therefore, CFD offers a major opportunity for the development and application of Grid technology in engineering and forms the motivation for the present study. A difficulty...

Jenkins, K; Yang, Xiaobo; Hayes, Mark; Cant, Stewart R

2008-06-26T23:59:59.000Z

182

BNL | Computational Biology & Bioinformatics  

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

Computational Biology & Bioinformatics Computational Biology and Bioinformatics groups focuses on quantitative predictive models of complex biological systems and their underlying...

183

Graph 500 Performance on a Distributed-Memory Cluster REU Site: Interdisciplinary Program in High Performance Computing  

E-Print Network (OSTI)

traditional performance benchmarks for high- performance computers measure the speed of arithmetic operations benchmark is intended to rank high-performance computers based on speed of memory retrieval-memory cluster tara in the UMBC High Performance Computing Facility (www.umbc.edu/hpcf). The cluster tara has 82

Gobbert, Matthias K.

184

Spatial computation  

Science Conference Proceedings (OSTI)

This paper describes a computer architecture, Spatial Computation (SC), which is based on the translation of high-level language programs directly into hardware structures. SC program implementations are completely distributed, with no centralized ... Keywords: application-specific hardware, dataflow machine, low-power, spatial computation

Mihai Budiu; Girish Venkataramani; Tiberiu Chelcea; Seth Copen Goldstein

2004-12-01T23:59:59.000Z

185

Parallel and Distributed Haskells  

Science Conference Proceedings (OSTI)

Parallel and distributed languages specify computations on multiple processors and have a computation language to describe the algorithm, i.e. what to compute, and a coordination language to describe how to organise the computations across ...

P. W. Trinder; H.-W. Loidl; R. F. Pointon

2002-07-01T23:59:59.000Z

186

The Modification of Joint SizeCharge Distribution in Rain. Part I: Computations which Exclude Partial Coalescence  

Science Conference Proceedings (OSTI)

The effect of individual charge-modifying processes is tested by following the development joint distributions of raindrop size and charge through a fall depth of 1 km beneath a weakly electrified warm cloud. Evaporation, ion capture and ...

S. G. Bradley; C. D. Stow

1984-10-01T23:59:59.000Z

187

Computing a Probability Distribution for the Start of the Rains from a Markov Chain Model for Precipitation  

Science Conference Proceedings (OSTI)

The start of the rains is defined to be the first day, or two-day rain spell, in which greater than a specified total amount of rain occurs. A method of calculating the probability distribution of the start of the rains from a Markov chain model ...

R. D. Stern

1982-03-01T23:59:59.000Z

188

Lighting Group: Light Distribution Systems  

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

Retrofit Alternatives to Incandescent Downlights Hotel and Institutional Bathroom Lighting Portable Office Lighting Systems Low Glare Outdoor Retrofit Luminaire LED Luminaires...

189

An iterative distributed algorithm for multi-constraint multicast routing  

Science Conference Proceedings (OSTI)

In this paper, we propose a group computation based distributed algorithm for solving the problem of multi-constraint multicast routing. This algorithm is fully distributed and can generate within acceptable time and message complexities a multicast ... Keywords: Distributed algorithm, Heuristic algorithm, Multicast, Multicast routing tree, Multiple constraints, NP-hardness, QoS, Routing protocol

Tzu-Lun Huang; D. T. Lee

2006-11-01T23:59:59.000Z

190

Enhancing group communication with self-manageable behavior  

Science Conference Proceedings (OSTI)

Group communication protocols (GCPs) play an important role in the design of modern distributed systems. A typical GCP exchanges control messages to provide message delivery guarantees, and a key point in the configuration of such a protocol is to establish ... Keywords: Autonomic computing, Dependability, Dynamic adaptation, Group communication, Self-management

Raimundo Jos De AraJo MacDo; Allan Edgard Silva Freitas; AlRio Santos De S

2013-04-01T23:59:59.000Z

191

Middleware support for many-task computing  

Science Conference Proceedings (OSTI)

Many-task computing aims to bridge the gap between two computing paradigms, high throughput computing and high performance computing. Many-task computing denotes high-performance computations comprising multiple distinct activities, coupled via file ... Keywords: Computing, Data-intensive distributed computing, Falkon, High-performance computing, High-throughput, Loosely-coupled applications, Many-task computing, Petascale, Swift

Ioan Raicu; Ian Foster; Mike Wilde; Zhao Zhang; Kamil Iskra; Peter Beckman; Yong Zhao; Alex Szalay; Alok Choudhary; Philip Little; Christopher Moretti; Amitabh Chaudhary; Douglas Thain

2010-09-01T23:59:59.000Z

192

Combining pair distribution function and computational methods to understand lithium insertion in brookite (TiO{sub 2}).  

Science Conference Proceedings (OSTI)

X-ray pair distribution function (PDF) methods and first-principles calculations have been combined to probe the structure of electrochemically lithiated TiO{sub 2} Brookite. Traditional powder diffraction studies suggest that Brookite amorphizes upon lithium insertion, with the Bragg reflections disappearing. However, PDF analysis indicates that the TiO{sub 2} framework connectivity is maintained throughout lithium intercalation, with expansions along the a and b axes. The Li{sup +} ions within the framework are poorly observed in the X-ray PDF, which is dominated by contributions from the more strongly scattering Ti and O atoms. First-principles calculations were used to identify energetically favorable Li{sup +} sites within the Brookite lattice and to develop a complete structural model of the lithiated material. This model replicates the local structure and decreased intermediate range order observed in the PDF data. The analysis suggests that local structural distortions of the TiO{sub 2} lattice accommodate lithium in five-coordinate sites. This structural model is consistent with the observed electrochemical behavior.

Dambournet, D.; Chapman, K. W.; Koudriachova, M. V.; Chupas, P. J.; Belharouak, I.; Amine, K. (X-Ray Science Division); ( CSE); (Univ. Coll. London)

2011-07-04T23:59:59.000Z

193

Computational Fluid Dynamics Modeling of The Dalles Project: Effects of Spill Flow Distribution Between the Washington Shore and the Tailrace Spillwall  

DOE Green Energy (OSTI)

The U.S. Army Corps of Engineers-Portland District (CENWP) has ongoing work to improve the survival of juvenile salmonids (smolt) migrating past The Dalles Dam. As part of that effort, a spillwall was constructed to improve juvenile egress through the tailrace downstream of the stilling basin. The spillwall was designed to improve smolt survival by decreasing smolt retention time in the spillway tailrace and the exposure to predators on the spillway shelf. The spillwall guides spillway flows, and hence smolt, more quickly into the thalweg. In this study, an existing computational fluid dynamics (CFD) model was modified and used to characterize tailrace hydraulics between the new spillwall and the Washington shore for six different total river flows. The effect of spillway flow distribution was simulated for three spill patterns at the lowest total river flow. The commercial CFD solver, STAR-CD version 4.1, was used to solve the unsteady Reynolds-averaged Navier-Stokes equations together with the k-epsilon turbulence model. Free surface motion was simulated using the volume-of-fluid (VOF) technique. The model results were used in two ways. First, results graphics were provided to CENWP and regional fisheries agency representatives for use and comparison to the same flow conditions at a reduced-scale physical model. The CFD results were very similar in flow pattern to that produced by the reduced-scale physical model but these graphics provided a quantitative view of velocity distribution. During the physical model work, an additional spill pattern was tested. Subsequently, that spill pattern was also simulated in the numerical model. The CFD streamlines showed that the hydraulic conditions were likely to be beneficial to fish egress at the higher total river flows (120 kcfs and greater, uniform flow distribution). At the lowest flow case, 90 kcfs, it was necessary to use a non-uniform distribution. Of the three distributions tested, splitting the flow evenly between Bay 7 and Bay 8 had hydraulics deemed most beneficial for egress by CENWP fisheries biologists and regional fishery agency representatives. The numerical and physical model results were very similar, building confidence in both hydraulic tools.

Rakowski, Cynthia L.; Serkowski, John A.; Richmond, Marshall C.

2010-12-01T23:59:59.000Z

194

The architecture and implementation of a distributed hypermedia storage system  

Science Conference Proceedings (OSTI)

Keywords: computer-supported cooperative work (CSCW), distributed data, distributed file systems, hypertext, performance, scalability

Douglas E. Shackelford; John B. Smith; F. Donelson Smith

1993-12-01T23:59:59.000Z

195

Author manuscript, published in "BENEVOL 2011 (2011)" Why Humans Cant Green Computers An Autonomous Green Approach for Distributed Environments  

E-Print Network (OSTI)

Energy-aware solutions and approaches are becoming broadly available as energy concerns is becoming mainstream. The usage of computers and other electronic devices (e.g., smartphones, sensors, or digital equipments) is increasing, thus impacting the overall energy consumption. Although ICT accounts for 2 % of global carbon emissions in 2007 [4], ICT solutions could help in reducing the energy footprint of other sectors (e.g., building, transportation, industry). In [10], the Climate Group estimates that ICT solutions could reduce 15 % of carbon emissions in 2020. However, in 2007, ICT footprint was 830 MtCO2e and is expected to grow to 1,430 MtCO2e in 2020 [10]. These numbers show the need for efficient ICT solutions in order to reduce carbon emissions and energy consumption. Reducing the energy consumption of connected devices and computers requires a comprehensive view of the different layers of the system. Sensors and actuators, used to monitor energy consumption and modify devices options, need to be controlled by intelligent software. Applications running on the devices and the hardware itself also need to be monitored and controlled in order to achieve efficient energy savings.

Adel Noureddine

2011-01-01T23:59:59.000Z

196

EPRI Framework for Evaluating Energy Storage Within Distribution Systems: Energy Storage Integration Council (ESIC) Application Working Group (WG1) - Reference Guide  

Science Conference Proceedings (OSTI)

Distribution planners now face the challenge of accurately including the impact and value of energy storage in distribution planning. The most common planning procedures rely heavily on a static power flow of a selected loading condition, usually the peak power demand forecasted for a selected planning period. This does not give an accurate representation of variable resources, such as solar photovoltaic (PV) generation and limited duration distributed energy resources like energy storage. There is ...

2013-12-22T23:59:59.000Z

197

Computer Science & Computer Engineering  

E-Print Network (OSTI)

CSCE Computer Science & Computer Engineering #12;Computer scientists and computer engineers design and implement e cient software and hardware solutions to computer-solvable problems. They are involved, virtual reality and robotics. Within the Computer Science department, we o er four exciting majors from

Rohs, Remo

198

Edge Computing Edge Computing is pushing the frontier of computing applications, data, and services  

E-Print Network (OSTI)

Edge Computing Edge Computing is pushing the frontier of computing applications, data, and services not be continuously connected to a network such as laptops, smartphones, tablets and sensors. Edge Computing covers Cloud/Fog Computing and Grid/Mesh Computing, distributed data storage and retrieval, autonomic self

199

Economic Scheduling in Grid Computing  

Science Conference Proceedings (OSTI)

Grid computing is a promising technology for future computing platforms. Here, the task of scheduling computing resources proves difficult as resources are geographically distributed and owned by individuals with different access and cost policies. This ...

Carsten Ernemann; Volker Hamscher; Ramin Yahyapour

2002-07-01T23:59:59.000Z

200

Cloud computing for dynamic systems  

Science Conference Proceedings (OSTI)

Cloud computing is a fast emerging model for enabling dynamic on-demand computing and IT-based services. It promotes dynamic properties and characteristics such as scalability, agility, flexibility, virtualised and distributed on-demand computing. However, ...

Khaled Sabry

2011-11-01T23:59:59.000Z

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


201

Proceedings of the IEEE Conf. on RealTime Computer Systems and Applications, Hiroshima, Japan, Oct. 1998 1 Simulation and Tracing of Hybrid Task Sets on Distributed Systems  

E-Print Network (OSTI)

Proceedings of the IEEE Conf. on Real­Time Computer Systems and Applications, Hiroshima, Japan, Oct of the IEEE Conf. on Real­Time Computer Systems and Applications, Hiroshima, Japan, Oct. 1998 2 Tokuda et al

Lipari, Giuseppe

202

Two-Cluster Distribution Functions  

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

Cluster Distribution Functions New New: Green's function Monte Carlo results We have computed momentum distributions and configuration space overlaps in a number of systems,...

203

NIST.gov - Computer Security Division - Computer Security ...  

Science Conference Proceedings (OSTI)

... Computer-Assisted Audit Techniques for UNIX, in the 14th Department of Energy Computer Security Group Conference Proceedings, 7-9 May 1991 ...

204

Games Computers Play: GameTheoretic Aspects of Computing  

E-Print Network (OSTI)

Games Computers Play: Game­Theoretic Aspects of Computing Nathan Linial \\Lambda 1 Introduction Computers may interact in great many ways. A parallel computer consists of a group of processors which cooperate in order to solve large­scale computational problems. Computers compete against each other

Linial, Nathan "Nati"

205

Group leader election under link-state routing  

Science Conference Proceedings (OSTI)

In this work, we place a long-established distributed computing problem in a new context. Specifically, the group leader election problem is studied ''inside the network,'' meaning that participants in the election process are network switches/routers, ... Keywords: Asynchronous transfer mode networks, Internet, Leader election, Link-state routing, Multicast communication

Y. Huang; P. K. Mckinley

2000-03-01T23:59:59.000Z

206

SK 1 of finite abelian groups. I  

Science Conference Proceedings (OSTI)

This paper lays the theoretical foundation for calculating the Whitehead groups of finite abelian ... The White- head group of a group G is ... computational methods; the results of all computations as well as the ad- ditional methods leading to...

207

Quantum Computing Computer Scientists  

E-Print Network (OSTI)

Quantum Computing for Computer Scientists Noson S. Yanofsky and Mirco A. Mannucci #12;© May 2007 Noson S. Yanofsky Mirco A. Mannucci #12;Quantum Computing for Computer Scientists Noson S. Yanofsky of Vector Spaces 3 The Leap From Classical to Quantum 3.1 Classical Deterministic Systems 3.2 Classical

Yanofsky, Noson S.

208

The economics of US greenhouse gas emissions reduction policy : assessing distributional effects across households and the 50 United States using a recursive dynamic computable general equilibrium (CGE) model  

E-Print Network (OSTI)

The political economy of US climate policy has revolved around state- and district- level distributional economics, and to a lesser extent household-level distribution questions. Many politicians and analysts have suggested ...

Look, Wesley Allen

2013-01-01T23:59:59.000Z

209

PDSF, NERSC's Physics Computing Cluster  

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

PDSF PDSF PDSF PDSF is a networked distributed computing cluster designed primarily to meet the detector simulation and data analysis requirements of physics, astrophysics and nuclear science collaborations. For more details see About PDSF. Click on the graphs below to see larger versions and longer term graphs. Running Jobs Pending Jobs 24 hour rolling usage graph Rolling 24 Pending Jobs by Group About Find out more about PDSF, including a general overview, and information about research groups and staff... Read More » PDSF Login Node Status Getting Started Guidance on obtaining a new user account, access, passwords, and setup files... Read More » Hardware Configuration Provides guidance on hardware configurations, including: login, compute, grid and transfer nodes, and working with particular file systems.

210

Computing for Perturbative QCD - A Snowmass White Paper  

E-Print Network (OSTI)

We present a study on high-performance computing and large-scale distributed computing for perturbative QCD calculations.

Christian Bauer; Zvi Bern; Radja Boughezal; John Campbell; Neil Christensen; Lance Dixon; Thomas Gehrmann; Stefan Hoeche; Junichi Kanzaki; Alexander Mitov; Pavel Nadolsky; Fredrick Olness; Michael Peskin; Frank Petriello; Stefano Pozzorini; Laura Reina; Frank Siegert; Doreen Wackeroth; Jonathan Walsh; Ciaran Williams; Markus Wobisch

2013-09-13T23:59:59.000Z

211

Controls Group  

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

Status and Schedule Safety and Training Divisions APS Engineering Support Division AES Groups Accelerator Systems Division ASD Groups X-ray Science Division XSD Groups...

212

Computational Science in Bio-metrology  

Science Conference Proceedings (OSTI)

Computational Science in Bio-metrology. Summary: ... Anne Plant, Cell Systems Science Group Kiran Bhadriraju, Cell Systems Science Group TN. ...

2013-05-01T23:59:59.000Z

213

Computational Biology | Supercomputing & Computation | ORNL  

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

Home | Science & Discovery | Supercomputing and Computation | Research Areas | Biology SHARE Computational Biology Computational Biology research encompasses many important...

214

Mathematics of Computer Algebra and Analysis - MOCAA - CECM  

E-Print Network (OSTI)

The Computer Algebra group at Simon Fraser, the Symbolic Computation group at Waterloo, and the ORCCA group at Western meet approximately biweekly.

215

Computational Needs for the Next Generation Electric Grid Proceedings  

E-Print Network (OSTI)

H.M. Gill,SmartGriddistributionautomationforpublicdistribution automation, computationalintelligenceapplications,andsmartgrid.

Birman, Kenneth

2012-01-01T23:59:59.000Z

216

Joint Electrical and Computer Engineering Department & Computer Science Department Seminar  

E-Print Network (OSTI)

of Distributed and Data Intensive Computing Center for Information Sciences and High Performance Computing is necessary to allow high performance computing and data centers to manage their energy costs while performing Services and High Performance Computing at Technische Universität Dresden, Dresden, Germany. More

217

Surgery groups of the fundamental groups of hyperplane arrangement complements.  

E-Print Network (OSTI)

Using a recent result of Bartels and Lueck (arXiv:0901.0442) we deduce that the Farrell-Jones Fibered Isomorphism conjecture in L-theory is true for any group which contains a finite index strongly poly-free normal subgroup, in particular, for the Artin full braid groups. As a consequence we explicitly compute the surgery groups of the Artin pure braid groups. This is obtained as a corollary to a computation of the surgery groups of a more general class of groups, namely for the fundamental group of the complement of any fiber-type hyperplane arrangement in the complex n-space.

S. Roushon.; 491-500

218

Computational illumination  

Science Conference Proceedings (OSTI)

The field of computational photography includes computational imaging techniques that enhance or extend the capabilities of digital photography, a combination of computer vision, computer graphics, and applied optics. Computational illumination is an ...

Matthew Turk

2010-11-01T23:59:59.000Z

219

CONCURRENCY AND COMPUTATION: PRACTICE AND EXPERIENCE Concurrency Computat.: Pract. Exper. 2008; 00:17 Prepared using cpeauth.cls [Version: 2002/09/19 v2.02] Global-scale Distributed I/O  

E-Print Network (OSTI)

Achieving high performance for distributed I/O on a wide-area network continues to be an elusive holy grail. Despite enhancements in network hardware as well as software stacks, achieving high-performance remains a challenge. In this paper, our worldwide team took a completely new and non-traditional approach to distributed I/O, called ParaMEDIC: Parallel Metadata Environment for Distributed I/O and Computing, by utilizing application-specific transformation of data to orders-of-magnitude smaller metadata before performing the actual I/O. Specifically, this paper details our experiences in deploying a large-scale system to facilitate the discovery of missing genes and constructing a genome similarity tree by encapsulating the mpiBLAST sequence-search algorithm into ParaMEDIC. The overall project involved nine different computational sites spread across the U.S. generating more than a petabyte of data, that was teleported to a large-scale facility in Tokyo for storage.

P. Balaji; W. Feng; H. Lin; J. Archuleta; S. Matsuoka; A. Warren; J. Setubal; E. Lusk; R. Thakur; I. Foster; D. S. Katz; S. Jha; K. Shinpaugh; S. Coghlan; D. Reed

2008-01-01T23:59:59.000Z

220

Quantum groups  

Science Conference Proceedings (OSTI)

The theory of Quantum groups, although rather young, since the expression Quantum ... introduction of a suitable form of the quantum group, the algebra A...

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


221

Computer Algebra Group - Upcomming Conferences - CECM  

E-Print Network (OSTI)

9-13 CASC 2013, Berlin, Germany, 2013. December 2013 7-11 ATCM 2013, Mumbai, India, December 7-11, 2013. 11-13 MACIS 2013, Nanning, China,...

222

Sandia`s network for SC `97: Supporting visualization, distributed cluster computing, and production data networking with a wide area high performance parallel asynchronous transfer mode (ATM) network  

Science Conference Proceedings (OSTI)

The advanced networking department at Sandia National Laboratories has used the annual Supercomputing conference sponsored by the IEEE and ACM for the past several years as a forum to demonstrate and focus communication and networking developments. At SC `97, Sandia National Laboratories (SNL), Los Alamos National Laboratory (LANL), and Lawrence Livermore National Laboratory (LLNL) combined their SC `97 activities within a single research booth under the Advance Strategic Computing Initiative (ASCI) banner. For the second year in a row, Sandia provided the network design and coordinated the networking activities within the booth. At SC `97, Sandia elected to demonstrate the capability of the Computation Plant, the visualization of scientific data, scalable ATM encryption, and ATM video and telephony capabilities. At SC `97, LLNL demonstrated an application, called RIPTIDE, that also required significant networking resources. The RIPTIDE application had computational visualization and steering capabilities. This paper documents those accomplishments, discusses the details of their implementation, and describes how these demonstrations support Sandia`s overall strategies in ATM networking.

Pratt, T.J.; Martinez, L.G.; Vahle, M.O.; Archuleta, T.V.; Williams, V.K.

1998-05-01T23:59:59.000Z

223

The Atom LEAP Platform For Energy-Efficient Embedded Computing  

E-Print Network (OSTI)

operation and results with platform applications in mobile computing, distributed sensing, network routing, and wireless

Singh, Digvijay; Kaiser, W J

2010-01-01T23:59:59.000Z

224

Connected gradings and fundamental group.  

E-Print Network (OSTI)

The main purpose of this paper is to provide explicit computations of the fundamental group of several algebras. For this purpose, given a $k$-algebra $A$, we consider the category of all connected gradings of $A$ by a group $G$ and we study the relation between gradings and Galois coverings. This theoretical tool gives information about the fundamental group of $A$, which allows its computation using complete lists of gradings.

Claude Cibils (I3M); Maria Julia Redondo (Departamento De Matematica UNS); Andrea Solotar (Departamento De Matematica UBA)

225

Distribution Power Flow in IRW Group Meeting  

E-Print Network (OSTI)

(PQ, SWING, PV) Maximum voltage error Busflag : HASSOURCE to indicates that this node can have.0; } Measurement: Energy, power, demand, real and reactive power 3 phase voltage and current Note: measured_demand is the watts measurement of the peak power demand of downstream objects. #12;Case study: IEEE 4 nodes test

Tesfatsion, Leigh

226

High Performance Adaptive Distributed Scheduling Algorithm  

Science Conference Proceedings (OSTI)

Exascale computing requires complex runtime systems that need to consider affinity, load balancing and low time and message complexity for scheduling massive scale parallel computations. Simultaneous consideration of these objectives makes online distributed ... Keywords: Distributed Scheduling, Adaptive Scheduling, Performance Analysis

Ankur Narang, Abhinav Srivastava, R. K. Shyamasundar

2013-05-01T23:59:59.000Z

227

Computing automorphisms of semigroups  

Science Conference Proceedings (OSTI)

In this paper an algorithm is presented that can be used to calculate the automorphism group of a finite transformation semigroup. The general algorithm employs a special method to compute the automorphism group of a finite simple semigroup. As applications ... Keywords: Automorphism group, Transformation semigroups

J. Arajo; P. V. Bnau; J. D. Mitchell; M. Neunhffer

2010-03-01T23:59:59.000Z

228

A distributed Hash table  

E-Print Network (OSTI)

DHash is a new system that harnesses the storage and network resources of computers distributed across the Internet by providing a wide-area storage service, DHash. DHash frees applications from re-implementing mechanisms ...

Dabek, Frank (Frank Edward), 1977-

2006-01-01T23:59:59.000Z

229

: Computer Aided Learning in Computer  

E-Print Network (OSTI)

CAL2 : Computer Aided Learning in Computer Architecture Laboratory JOVAN DJORDJEVIC,1 BOSKO NIKOLIC,1 TANJA BOROZAN,1 ALEKSANDAR MILENKOVIC´ 2 1 Computer Engineering Department, Faculty of Electrical Engineering, University of Belgrade, Belgrade, Serbia 2 Electrical and Computer Engineering Department

Milenkovi, Aleksandar

230

The distributed ASCI Supercomputer project  

Science Conference Proceedings (OSTI)

The Distributed ASCI Supercomputer (DAS) is a homogeneous wide-area distributed system consisting of four cluster computers at different locations. DAS has been used for research on communication software, parallel languages and programming systems, ...

Henri Bal; Raoul Bhoedjang; Rutger Hofman; Ceriel Jacobs; Thilo Kielmann; Jason Maassen; Rob van Nieuwpoort; John Romein; Luc Renambot; Tim Rhl; Ronald Veldema; Kees Verstoep; Aline Baggio; Gerco Ballintijn; Ihor Kuz; Guillaume Pierre; Maarten van Steen; Andy Tanenbaum; Gerben Doornbos; Desmond Germans; Hans Spoelder; Evert-Jan Baerends; Stan van Gisbergen; Hamideh Afsermanesh; Dick van Albada; Adam Belloum; David Dubbeldam; Zeger Hendrikse; Bob Hertzberger; Alfons Hoekstra; Kamil Iskra; Drona Kandhai; Dennis Koelma; Frank van der Linden; Benno Overeinder; Peter Sloot; Piero Spinnato; Dick Epema; Arjan van Gemund; Pieter Jonker; Andrei Radulescu; Cees van Reeuwijk; Henk Sips; Peter Knijnenburg; Michael Lew; Floris Sluiter; Lex Wolters; Hans Blom; Cees de Laat; Aad van der Steen

2000-10-01T23:59:59.000Z

231

Computer patent disclosures  

Science Conference Proceedings (OSTI)

Suppose a potentially very valuable experimental multi-computer system is being designed by you and your group. You feel you have made at least a system invention. In your Company scientists and engineers are responsible for initiating invention disclosures.

Joseph P. Kates

1964-10-01T23:59:59.000Z

232

Continuous-Time Distributed Observers with Discrete Communication  

E-Print Network (OSTI)

computation. Distributed estimation problems arise, for instance, in sensor networks, electric power grids data, and rely upon distributed mechanisms to merge local computations, such as intermediate dataContinuous-Time Distributed Observers with Discrete Communication Florian D¨orfler, Fabio

Bullo, Francesco

233

IEEE Computer Society: http://computer.org Computer: http://computer.org/computer  

E-Print Network (OSTI)

IEEE Computer Society: http://computer.org Computer: http://computer.org/computer computer@computer.org IEEE Computer Society Publications Office: +1 714 821 8380 COVER FEATURES GUEST EDITOR'S INTRODUCTION 28 Computational Photography--The Next Big Step Oliver Bimber Computational photography extends

Stanford University

234

Computer Rekonstruktion  

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

Computer Rekonstruktion Von jedem Kollisionsereignis registriert der Detektor Millionen von Datenpunkten. Daher ist es ntig, dass ein Computer diese Datenmenge verarbeitet: die...

235

Distribution Statement A: Approved for public release; distribution is unlimited.  

E-Print Network (OSTI)

: Approved for public release; distribution is unlimited. AHPCRC, The Army High Performance Computing for the warfighter. High performance computing (HPC) provides significant advantages in designing and characterizing theories and best practices of simulation-based engineering sciences and high performance computing

Prinz, Friedrich B.

236

Topic Group Participants  

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

Topic Group Report Topic Group Report Presented to: Transportation External Coordination Working Group April 5, 2005 Phoenix, Arizona Recent 180(c) Topic Group Activities Issue Papers 1. Funding Distribution Method 2. Allowable Activities 3. Definitions 4. Pass-Through Requirements 5. Contingency Plans 6. 180(c) Policy or Rulemaking 7. Timing and Eligibility* 8. Funding for Related Activities* 9. State Fees* 10. Funding Allocation Approach* 180(c) Policy & Procedures * Executive Summary * Draft Policy & Procedures * Draft Grant Application Pckg * Appendix *Papers 7-10 still under discussion Today's Discussion Items * Reviewed Topic Group member comments on a variety of issues * Key issues included: - Funding allocation and timing of grants - Planning grants - State fees/matching requirements - Related non-training activities

237

Development of a Beowulf-Class High Performance Computing System for Computational Science Applications  

E-Print Network (OSTI)

Using Beowulf cluster computing technology, the Ateneo High Performance Computing Group has developed a high performance computing system consisting of eight compute nodes. Called the AGILA HPCS this Beowulf cluster computer is designed for computational science applications. In this paper, we present the motivation for the AGILA HPCS and some results on its performance evaluation.

Rafael Saldaa; Jerrold Garcia; Felix Muga Ii; William Yu

2001-01-01T23:59:59.000Z

238

Computer Forensics  

Science Conference Proceedings (OSTI)

Computer Forensics. National Software Reference Library (NSRL) -- The National Software Reference Library (NSRL) is ...

2010-10-05T23:59:59.000Z

239

Group communication specifications: a comprehensive study  

Science Conference Proceedings (OSTI)

View-oriented group communication is an important and widely used building block for many distributed applications. Much current research has been dedicated to specifying the semantics and services of view-oriented group communication systems (GCSs). However, ... Keywords: Group communication systems, partitionable group membership, process group membership, specifications of group communication systems, view synchrony, virtual synchrony

Gregory V. Chockler; Idit Keidar; Roman Vitenberg

2001-12-01T23:59:59.000Z

240

Computation of ASR Systems  

E-Print Network (OSTI)

This paper proposes a novel technique to reduce the likelihood computation in ASR systems that use continuous density HMMs. Based on the nature of dynamic features and the numerical properties of Gaussian mixture distributions, we approximate the observation likelihood computation to achieve a speedup. Although the technique does not show appreciable benefit in an isolated word task, it yields significant improvements in continuous speech recognition. For example, 50 % of the computation can be saved on the TIMIT database with only a negligible degradation in system performanc 1

Xiao Li; Jeff Bilmes; Xiao Li; Jeff Bilmes

2003-01-01T23:59:59.000Z

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


241

Dumb Ideas in Computer Security  

E-Print Network (OSTI)

Dumb Ideas in Computer Security Dr Charles P Pfleeger Pfleeger Consulting Group 19 July 2011 chuck Security" (2005) http://www.ranum.com/security/computer_security/editorials/dumb/ Default permit Ideas in Computer Security 219 Jul 2011 #12;Struck a Nerve Results 1-10 of about 2,030,000 for dumb

242

Soft Molecular Computing Computer Science  

E-Print Network (OSTI)

Soft Molecular Computing Max Garzon Computer Science The University of Memphis Memphis, TN 38152@memphis.edu Abstract Molecular computing (MC) utilizes the complex interaction of biomolecules and molecular biology for computational purposes. Five years later, substantial obstacles remain to bring the potential of molecular

Deaton, Russell J.

243

Computing and Electronics Computer Technology  

E-Print Network (OSTI)

Computing and Electronics Technology Computer Technology NetworkManagementoption InformationSystemsManagementoption Computer System Technician Electronics Technology Energy Technology ace.cte.umt.edu www.cte.umt.edu Department of Applied Computing and Electronics Chair: Tom Gallagher Phone: 406.243.7814 Email: Thomas

Crone, Elizabeth

244

Nick Wright Named Advanced Technologies Group Lead  

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

4, 2013 Nick Nick Wright has been named head of the National Energy Research Scientific Computing Center's (NERSC) Advanced Technologies Group (ATG), which focuses on...

245

Hybrid distributed generation for power distribution systems planning  

Science Conference Proceedings (OSTI)

This paper presents planning models for hybrid distributed generation systems, as well as the results corresponding to a distribution systems planning problem obtained using a new computational tool based on a Geographic Information System, GIS. This ... Keywords: distributed generation (DG), geographical information systems (GIS), hybrid power systems, optimal planning

I. J. Ramrez-Rosado; P. J. Zorzano-Santamara; L. A. Fernndez-Jimnez; E. Garca-Garrido; P. Lara-Santilln; E. Zorzano-Alba; M. Mendoza-Villena

2006-02-01T23:59:59.000Z

246

Security Topic Group  

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

Group Group Security and TEC * Tension exists between open forum concept of TEC and the ability of STG members to discuss security topics. - DOE will maintain the open forum - it will not form a subgroup of cleared members NAS Study * Some members want STG to formally recommend a fully independent review of security issues - DOE is reviewing the NAS study and has not formulated a position Security Topic Group (Continued) Classification Guide & Information Sharing Protocol * Guide is finished and undergoing internal concurrence - Slated for late September release * Protocol will be completed once the guide is issued Security-Related Lessons Learned * Lessons learned document was distributed and comments requested by the end of March Security Topic Group (Continued) SRG/CVSA Survey

247

Examination on SK atmospheric neutrino experiment by the computer experiment  

E-Print Network (OSTI)

We examine neutrino events occurring inside the SuperKamiokande (SK) detector and those occurring outside the same detector using computer simulations. We analyze the zenith angle distribution of Fully Contained Events and show the method for the determination of the incident neutrino by the SK group is unreliable. The analysis of the neutrino events occurring outside the detector shows these events agree with the Monte Carlo simulation without oscillation.

A Misaki; E Konishi; N Takahashi; Y Minorikawa; V I Galkin; M Ishiwata; I Nakamura; M Kato

2006-05-08T23:59:59.000Z

248

Polish contribution to the worldwide LHC computing  

Science Conference Proceedings (OSTI)

The computing requirements of LHC experiments, as well as their computing models, are briefly presented. The origin of grid technology and its development in high energy community is outlined, including the Polish participation. The LHC Computing Grid ... Keywords: LHC, Tier-2, WLCG, distributed computing, gLite, grid, high energy physics, middleware

Artur Binczewski; Micha$#322; Bluj; Antoni Cyz; Micha$#322; Dwu?nik; Maciej Filocha; ?ukasz Flis; Ryszard Gokieli; Jaros$#322;aw Iwaszkiewicz; Marek Kowalski; Patryk Laso$#324;; Rafa$#322; Lichwa$#322;a; Micha$#322; ?opuszy$#324;ski; Marek Magry$#347;; Piotr Malecki; Norbert Meyer; Krzysztof Nawrocki; Andrzej Olszewski; Andrzej Ozi?b$#322;o; Adam Pade; Henryk Pa$#322;ka; Marcin Pospieszny; Marcin Radecki; Rados$#322;aw Rowicki; Dorota Stojda; Marcin Stolarek; Tomasz Szepieniec; Tadeusz Szymocha; Micha$#322; Tura$#322;a; Karol Wawrzyniak; Wojciech Wi$#347;licki; Mariusz Witek; Pawe$#322; Wolniewicz

2012-01-01T23:59:59.000Z

249

Specific Group Hardware  

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

Specific Group Hardware Specific Group Hardware Specific Group Hardware ALICE palicevo1 The Virtual Organization (VO) server. Serves as gatekeeper for ALICE jobs. It's duties include getting assignments from ALICE file catalog (at CERN), submitting jobs to pdsfgrid (via condor) which submits jobs to the compute nodes, monitoring the cluster work load, and uploading job information to ALICE file catalog. It is monitored with MonALISA (the monitoring page is here). It's made up of 2 Intel Xeon E5520 processors each with 4 cores (16 virtual cores with hyperthreading). The total local disk space is 1.9 TB. It is running Scientific Linux SL release 5.5 (Boron) and is disk booted. It is in rack 17. palicevo2 The Virtual Organization (VO) server testbed. It's a Dell PowerEdge R410 with 2 Intel Xeon E5520 processors, each with 4 cores (16 virtual cores

250

Demonstration of Intelligent Control and Fan Improvements in Computer Room  

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

Demonstration of Intelligent Control and Fan Improvements in Computer Room Demonstration of Intelligent Control and Fan Improvements in Computer Room Air Handlers Title Demonstration of Intelligent Control and Fan Improvements in Computer Room Air Handlers Publication Type Report Refereed Designation Unknown LBNL Report Number LBNL-6007E Year of Publication 2012 Authors Coles, Henry C., Steve E. Greenberg, and Corrine Vita Document Number LBNL-6007E Date Published 12/2012 Publisher Lawrence Berkeley National Laboratory City Berkeley, CA Keywords air distribution, building technology and urban systems department, computer room air handler, crah control, data center, data center crah, ec fan, ecm, ecm fan, fan speed control, high tech and industrial systems group, plug fan, variable frequency drive, vfd, wireless control Abstract

251

Scalable data management in distributed information systems  

Science Conference Proceedings (OSTI)

In the era of cloud computing and huge information systems, distributed applications should manage dynamic workloads; i.e., the amount of client requests per time unit may vary frequently and servers should rapidly adapt their computing efforts to those ... Keywords: NoSQL, cloud computing, data management, distributed system, high availability, scalability

M. Remedios Pallard-Lozoya; Javier Esparza-Peidro; Jos-Ramn Garca-Escriv; Hendrik Decker; Francesc D. Muoz-Esco

2011-10-01T23:59:59.000Z

252

Reducing memory sharing overheads in distributed JVMs  

Science Conference Proceedings (OSTI)

Distributed JVM systems by supporting Javas shared-memory model enable concurrent Java applications to run transparently on clusters of computers. Aiming to reduce the overheads associated to memory coherence enforcement mechanisms required in ... Keywords: JVM, Java, cluster computing, concurrent Java applications, distributed shared memory, high-performance computing

Marcelo Lobosco; Orlando Loques; Claudio L. de Amorim

2005-09-01T23:59:59.000Z

253

EMSL: Capabilities: Molecular Science Computing  

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

Partners and Related Links Partners and Related Links These are the organizations with which EMSL maintains closest relationships in high performance computing and software development. Partners Note: The links below leave this site Argonne National Laboratory (ANL) National Energy Research Scientific Computing Center (NERSC) at Lawrence Berkeley National Laboratory (LBNL) Daresbury Laboratory San Diego Supercomputer Center (SDSC) at UCSD Maui High Performance Computing Center (MHPCC) Intel Corporation Silicon Graphics, Inc. Hewlett-Packard Company (HP) Quadrics Ltd. Organizations SP-XXL SCICOMP Cray User Group (CUG) SC Conference Series - International Conference of High Performing Computing and Communications High Performance Computing Links Advanced Simulation and Computing at Lawrence Livermore National

254

The Group Diffie-Hellman Problems  

Science Conference Proceedings (OSTI)

In this paper we study generalizations of the Diffie-Hellman problems recently used to construct cryptographic schemes for practical purposes. The Group Computational and the Group Decisional Diffie-Hellman assumptions not only enable one to construct ...

Emmanuel Bresson; Olivier Chevassut; David Pointcheval

2002-08-01T23:59:59.000Z

255

Light Computing  

E-Print Network (OSTI)

A configuration of light pulses is generated, together with emitters and receptors, that allows computing. The computing is extraordinarily high in number of flops per second, exceeding the capability of a quantum computer for a given size and coherence region. The emitters and receptors are based on the quantum diode, which can emit and detect individual photons with high accuracy.

Gordon Chalmers

2006-10-13T23:59:59.000Z

256

Challenges in distributed energy adaptive computing  

Science Conference Proceedings (OSTI)

Fueled by burgeoning online services, energy consumption in information technology (IT) equipment is becoming a major concern from a variety of perspectives including the continuation of Moore's Law for hardware design, enabling sophisticated mobile ...

Krishna Kant

2010-01-01T23:59:59.000Z

257

Distributed BLAST in a grid computing context  

Science Conference Proceedings (OSTI)

The Basic Local Alignment Search Tool (BLAST) is one of the best known sequence comparison programs available in bioinformatics. It is used to compare query sequences to a set of target sequences, with the intention of finding similar sequences in the ...

Micha M. Bayer; Richard Sinnott

2005-09-01T23:59:59.000Z

258

Snowmass Computing Frontier I2: Distributed  

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

allocation) Cosmology 53 M Accel 23 M (32 M including BES & NP) DOE INCITE (ALCF, OLCF): 820 M Hours LQCD 400 M Supernova 230 M Cosmology 80 M NSF...

259

Computing Borel's Regulator II.  

E-Print Network (OSTI)

In our earlier article we described a power series formula for the Borel regulator evaluated on the odd-dimensional homology of the general linear group of a number field and, concentrating on dimension three for simplicity, described a computer algorithm which calculates the value to any chosen degree of accuracy. In this sequel we give an algorithm for the construction of the input homology classes and describe the results of one cyclotomic field computation.

Zacky Choo; Wajid Mannan; Rubn J. Snchez-Garca; Victor P. Snaith

260

Intrusion ripple analysis in distributed information systems  

Science Conference Proceedings (OSTI)

Security is a very important aspect of distributed computing systems, especially in distributed information environments involving wide-area networks, such as internets. This paper addresses how a security breach, such as intrusion, propagates through ... Keywords: computer crime, distributed information systems, internets, intrusion ripple analysis, networked information system, ripple effect analysis, security breach propagation, software maintenance, wide-area networks

S. S. Yau; Jun Zhu

1997-10-01T23:59:59.000Z

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


261

A Framework for Enabling Distributed Applications on the Internet  

E-Print Network (OSTI)

The last five years have seen the rapid rise in popularity of what we term internet distributed applications (IDAs). These are internet applications with which many users interact simultaneously. IDAs range from P2P file-sharing applications, to collaborative distributed computing projects, to massively multiplayer online games (MMOGs). Currently, there is no framework that combines IDAs collectively within a single context. We provide a basis for such a framework here. In considering IDAs collectively, we found that there was no generic description that had been applied to them as a group. We have therefore put forward such a description here. In our description, IDAs are functionality separated into three logic layers, which are designed and built individually. Each layer is represented by functionality on the software client running on each participating computer, which together comprise the overall IDA. The core contribution of this work is a framework, called the Internet Distributed Application Framewor...

McLaughlin, Mark Anthony

2011-01-01T23:59:59.000Z

262

Distributed service composition  

E-Print Network (OSTI)

In this paper we explore the use of action systems for distributed service composition. Distributed systems can be composed out of a basic computation and a set of services. Even though this way of designing a system out of components helps in managing the derivation task, formal description techniques are needed due to the complexity of distributed systems. We propose a method where services, or features as they are often called, are speci ed in isolation by the service provider. The services when available are used by clients in a distributed manner. Reasoning about the services and their interactions with each other and with the basic computation of the clients is carried out within the re nement calculus. To exemplify the proposed methodology we study feature composition and feature interaction in telecommunications software.

Joost N. Kok; Kaisa Sere

1999-01-01T23:59:59.000Z

263

The skewness of computer science  

E-Print Network (OSTI)

Computer science is a relatively young discipline combining science, engineering, and mathematics. The main flavors of computer science research involve the theoretical development of conceptual models for the different aspects of computing and the more applicative building of software artifacts and assessment of their properties. In the computer science publication culture, conferences are an important vehicle to quickly move ideas, and journals often publish deeper versions of papers already presented at conferences. These peculiarities of the discipline make computer science an original research field within the sciences, and, therefore, the assessment of classical bibliometric laws is particularly important for this field. In this paper, we study the skewness of the distribution of citations to journals and conference papers published in computer science venues. We find that the skewness in the distribution of mean citedness of different journals combines with the asymmetry in citedness of articles in eac...

Franceschet, Massimo

2009-01-01T23:59:59.000Z

264

Creating effective student groups: an introduction to groupformation.org  

Science Conference Proceedings (OSTI)

Success in the computing industry often depends on an individual's ability to be a productive member of an effective study group or project team. In order to prepare students for successful careers, computer science curriculum often includes group projects. ... Keywords: group fromation, grouping, groupware, student groups, student teams, team formation

Tyson R. Henry

2013-03-01T23:59:59.000Z

265

Discrete Structures for Computer Science  

E-Print Network (OSTI)

issues. #12;16 Sub-Category Graph No Threshold New Science of Networks NYS Electric Power Grid (Thorp a fast search engine? ·What is the foundation of internet security? algorithms, data structures, database, parallel computing, distributed systems, cryptography, computer networks... Logic, sets/functions, counting

Dragan, Feodor F.

266

Security and Policy for Group Collaboration  

Science Conference Proceedings (OSTI)

Security and Policy for Group Collaboration was a Collaboratory Middleware research project aimed at providing the fundamental security and policy infrastructure required to support the creation and operation of distributed, computationally enabled collaborations. The project developed infrastructure that exploits innovative new techniques to address challenging issues of scale, dynamics, distribution, and role. To reduce greatly the cost of adding new members to a collaboration, we developed and evaluated new techniques for creating and managing credentials based on public key certificates, including support for online certificate generation, online certificate repositories, and support for multiple certificate authorities. To facilitate the integration of new resources into a collaboration, we improved significantly the integration of local security environments. To make it easy to create and change the role and associated privileges of both resources and participants of collaboration, we developed community wide authorization services that provide distributed, scalable means for specifying policy. These services make it possible for the delegation of capability from the community to a specific user, class of user or resource. Finally, we instantiated our research results into a framework that makes it useable to a wide range of collaborative tools. The resulting mechanisms and software have been widely adopted within DOE projects and in many other scientific projects. The widespread adoption of our Globus Toolkit technology has provided, and continues to provide, a natural dissemination and technology transfer vehicle for our results.

Ian Foster; Carl Kesselman

2006-07-31T23:59:59.000Z

267

Lighting Group: Overview  

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

Overview Overview Overview of the Lighting Research Group The Lighting Research Group at Lawrence Berkeley National Laboratory performs research aimed at improving the energy efficiency of lighting systems in buildings and homes, throughout the State of California and across the Nation. The goal is to reduce lighting energy consumption by 50% over twenty years by improving the efficiency of light sources, and controlling and delivering illumination so that it is available, where and when needed, and at the required intensity. Research in the Lighting Group falls into three main areas: Sources and Ballasts, Light Distribution Systems and Controls and Communications. Click on a link below for more information about each of these research areas. Sources and Ballasts investigates next generation light sources, such as

268

Parallel I/O Support for HPF on Computational Grids  

Science Conference Proceedings (OSTI)

Recently several projects have started to implement largescale high-performance computing on "computational grids" composed of heterogeneous and geographically distributed systems of computers, networks, and storage devices that collectively act as a ...

Peter Brezany; Jonghyun Lee; Marianne Winslett

2002-05-01T23:59:59.000Z

269

Group signatures are suitable for constrained devices  

Science Conference Proceedings (OSTI)

In a group signature scheme, group members are able to sign messages on behalf of the group. Moreover, resulting signatures are anonymous and unlinkable for every verifier except for a given authority. In this paper, we mainly focus on one of the most ... Keywords: anonymity, constrained devices, group signature, server-aided computation

Sbastien Canard; Iwen Coisel; Giacomo De Meulenaer; Olivier Pereira

2010-12-01T23:59:59.000Z

270

A metrics framework for evaluating group formation  

Science Conference Proceedings (OSTI)

Many approaches to learning and teaching rely upon students working in groups. So far, many Computer-Supported Group Formation systems have been designed to facilitate the formation of optimal groups in learning. However, evaluating the quality of automated ... Keywords: efficiency, group formation, optimization

Asma Ounnas; David E. Millard; Hugh C. Davis

2007-11-01T23:59:59.000Z

271

Distribution Category:  

Office of Legacy Management (LM)

- - Distribution Category: Remedial Action and Decommissioning Program (UC-70A) DOE/EV-0005/48 ANL-OHS/HP-84-104 ARGONNE NATIONAL LABORATORY 9700 South Cass Avenue Argonne, Illinois 60439 FORMERLY UTILIZED MXD/AEC SITES REMEDIAL ACTION PROGRAM RADIOLOGICAL SURVEY OF THE HARSHAW CHEMICAL COMPANY CLEVELAND. OHIO Prepared by R. A. Wynveen Associate Division Director, OHS W. H. Smith Senior Health Physicist C. M. Sholeen Health Physicist A. L. Justus Health Physicist K. F. Flynn Health Physicist Radiological Survey Group Health Physics Section Occupational Health and Safety Division April 1984 Work Performed under Budget Activity DOE KN-03-60-40 and ANL 73706 iii PREFACE AND EXECUTIVE SUMMARY This is one in a series of reports resulting from a program initiated

272

Improving MapReduce energy efficiency for computation intensive workloads  

Science Conference Proceedings (OSTI)

MapReduce is a programming model for data intensive computing on large-scale distributed systems. With its wide acceptance and deployment, improving the energy efficiency of MapReduce will lead to significant energy savings for data centers and computational ... Keywords: intelligent DVFS scheduling, MapReduce energy efficiency, computation intensive workloads, data intensive computing, large-scale distributed systems, data centers, computational grids, energy savings, Hadoop, energy-proportional computing, resource allocation, dynamic voltage and frequency scaling, processor frequency

Thomas Wirtz; Rong Ge

2011-07-01T23:59:59.000Z

273

Broadcasting a message in a parallel computer  

DOE Patents (OSTI)

Methods, systems, and products are disclosed for broadcasting a message in a parallel computer. The parallel computer includes a plurality of compute nodes connected together using a data communications network. The data communications network optimized for point to point data communications and is characterized by at least two dimensions. The compute nodes are organized into at least one operational group of compute nodes for collective parallel operations of the parallel computer. One compute node of the operational group assigned to be a logical root. Broadcasting a message in a parallel computer includes: establishing a Hamiltonian path along all of the compute nodes in at least one plane of the data communications network and in the operational group; and broadcasting, by the logical root to the remaining compute nodes, the logical root's message along the established Hamiltonian path.

Berg, Jeremy E. (Rochester, MN); Faraj, Ahmad A. (Rochester, MN)

2011-08-02T23:59:59.000Z

274

Broadcasting a message in a parallel computer  

Science Conference Proceedings (OSTI)

Methods, systems, and products are disclosed for broadcasting a message in a parallel computer. The parallel computer includes a plurality of compute nodes connected together using a data communications network. The data communications network optimized for point to point data communications and is characterized by at least two dimensions. The compute nodes are organized into at least one operational group of compute nodes for collective parallel operations of the parallel computer. One compute node of the operational group assigned to be a logical root. Broadcasting a message in a parallel computer includes: establishing a Hamiltonian path along all of the compute nodes in at least one plane of the data communications network and in the operational group; and broadcasting, by the logical root to the remaining compute nodes, the logical root's message along the established Hamiltonian path.

Berg, Jeremy E. (Rochester, MN); Faraj, Ahmad A. (Rochester, MN)

2011-08-02T23:59:59.000Z

275

Computer Science  

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

in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics Cite Seer Department of Energy provided open access science research citations...

276

Computational Chemistry  

Science Conference Proceedings (OSTI)

... and numerical tools to quantify uncertainties for computational quantum chemistry. ... Results appear in the issue of The Journal of Chemical Physics. ...

2010-10-05T23:59:59.000Z

277

Remote procedure execution software for distributed systems  

SciTech Connect

Remote Procedure Execution facilitates the construction of distributed software systems, spanning computers of various types. Programmers who use the RPX package specify subroutine calls which are to be executed on a remote computer. RPX is used to generate code for dummy routines which transmit input parameters and receive output parameters, as well as a main program which receives procedure call requests, calls the requested procedure, and returns the result. The package automatically performs datatype conversions and uses an appropriate connection oriented protocol. Supported operating systems/processors are VMS(VAX), UNIX(MIPS R2000, R3000) and Software Components Group's pSOS (680x0). Connection oriented protocols are supported over Ethernet (TCP/IP) and RS232 (a package of our own design). 2 refs., 2 figs.

Petravick, D.L.; Berman, E.F.; Sergey, G.P.

1989-05-01T23:59:59.000Z

278

Defining computer documentation audiences  

SciTech Connect

The paper is intended to enlighten technical writers in the computer field to the importance of defining their audiences. Observations are made about audiences in general, realms of experience, levels of usage, numbers of documents, grouping audiences and writing for specific audiences.

Tanner, R.D.

1976-01-01T23:59:59.000Z

279

Quantum computing  

E-Print Network (OSTI)

This article gives an elementary introduction to quantum computing. It is a draft for a book chapter of the "Handbook of Nature-Inspired and Innovative Computing", Eds. A. Zomaya, G.J. Milburn, J. Dongarra, D. Bader, R. Brent, M. Eshaghian-Wilner, F. Seredynski (Springer, Berlin Heidelberg New York, 2006).

J. Eisert; M. M. Wolf

2004-01-05T23:59:59.000Z

280

Homepage: Computing Operations & Support, HPC-2: High-Performance...  

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

2 Home SERVICES PRODUCTS Data Storage ES&H Management and Support High Performance Computing Operations Procurement Computer Support CONTACTS Group Leader (Acting) Cindy Martin...

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


281

Algorithms for dynamic multicast key distribution  

Science Conference Proceedings (OSTI)

We study the problem of multicast key distribution for group security. Secure group communication systems typically rely on a group key, which is a secret shared among the members of the group. This key is used to provide privacy by encrypting all group ... Keywords: Dynamic key distribution, experimental algorithms, multicast

Justin Goshi; Richard E. Ladner

2007-02-01T23:59:59.000Z

282

Computer Science Sample Occupations  

E-Print Network (OSTI)

Computer Science Sample Occupations COMPUTER OPERATIONS Computer Hardware/ Software Engineer Computer Operator Database Manager/ Administrator Data Entry Operator Operations Manager DESIGN & MANUFACTURING, ENGINEERING Coder CAD Computer Applications Engineers Computer Research Scientist Computer

Ronquist, Fredrik

283

NERSC User Group Meeting  

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

NERSC User Group Meeting NERSC User Group Meeting Oct 18, 2010 Outline * About OpenMP * Parallel Regions * Worksharing Constructs * Synchronization * Data Scope * Tasks * Using OpenMP at NERSC 2 3 Common Architectures * Shared Memory Architecture - Multiple CPUs share global memory, could have local cache - Uniform Memory Access (UMA) - Typical Shared Memory Programming Model: OpenMP, Pthreads, ... * Distributed Memory Architecture - Each CPU has own memory - Non-Uniform Memory Access (NUMA) - Typical Message Passing Programming Model: MPI, ... * Hybrid Architecture - UMA within one SMP node - NUMA across nodes - Typical Hybrid Programming Model: mixed MPI/OpenMP, ... What is OpenMP * OpenMP is an industry standard API of C/C++ and Fortran for shared memory parallel programming.

284

Chromatin Computation  

E-Print Network (OSTI)

In living cells, DNA is packaged along with protein and RNA into chromatin. Chemical modifications to nucleotides and histone proteins are added, removed and recognized by multi-functional molecular complexes. Here I define a new computational model, in which chromatin modifications are information units that can be written onto a one-dimensional string of nucleosomes, analogous to the symbols written onto cells of a Turing machine tape, and chromatin-modifying complexes are modeled as read-write rules that operate on a finite set of adjacent nucleosomes. I illustrate the use of this chromatin computer to solve an instance of the Hamiltonian path problem. I prove that chromatin computers are computationally universal and therefore more powerful than the logic circuits often used to model transcription factor control of gene expression. Features of biological chromatin provide a rich instruction set for efficient computation of nontrivial algorithms in biological time scales. Modeling chromatin as a computer shifts how we think about chromatin function, suggests new approaches to medical intervention, and lays the groundwork for the engineering of a new class of biological computing machines.

Barbara Bryant

2012-01-01T23:59:59.000Z

285

Distributed Energy Resources Market Diffusion Model  

E-Print Network (OSTI)

8] Energy Efficiency Standards Group. (2005) Tariff Analysistariffs and DER technology cost and performance data to run the Distributed Energy

Maribu, Karl Magnus; Firestone, Ryan; Marnay, Chris; Siddiqui, Afzal S.

2006-01-01T23:59:59.000Z

286

Grid-computing portals and security issues  

Science Conference Proceedings (OSTI)

Computational grids provide computing power by sharing resources across administrative domains. This sharing, coupled with the need to execute untrusted code from arbitrary users, introduces security hazards. Grid environments are built on top of ... Keywords: UNIX access model, access control, distributed computing, grid environments, grid security, virtual machines

Ali Raza Butt; Sumalatha Adabala; Nirav H. Kapadia; Renato J. Figueiredo; Jos A. B. Fortes

2003-10-01T23:59:59.000Z

287

Computer Experiments in Finite Algebra  

E-Print Network (OSTI)

The experiments described here concern an initial design for a computer system specifically for the handling of finite groups, rings, fields, semigroups, and vector spaces. The usefulness of such a system was discussed in ...

Maurer, W.D.

1965-06-01T23:59:59.000Z

288

The PVM Concurrent Computing System: Evolution, Experiences, and Trends  

E-Print Network (OSTI)

The PVM system, a software framework for heterogeneous concurrent computing in networked environments, has evolved in the past several years into a viable technology for distributed and parallel processing in a variety of disciplines. PVM supports a straightforward but functionally complete message passing model, and is capable of harnessing the combined resources of typically heterogeneous networked computing platforms to deliver high levels of performance and functionality. In this paper, we describe the architecture of PVM system, and discuss its computing model, the programming interface it supports, auxiliary facilities for process groups and MPP support, and some of the internal implementation techniques employed. Performance issues, dealing primarily with communication overheads, are analyzed, and recent findings as well as experimental enhancements to are presented. In order to demonstrate the viability of PVM for large scale scientific supercomputing, the paper incl...

V. S. Sunderam; G. A. Geist; J. Dongarra; R. Manchek

1994-01-01T23:59:59.000Z

289

Computing compliance  

Science Conference Proceedings (OSTI)

Inquisitive semantics (cf. Groenendijk, 2008) provides a formal framework for reasoning about information exchange. The central logical notion that the semantics gives rise to is compliance. This paper presents an algorithm that computes the set of compliant ...

Ivano Ciardelli; Irma Cornelisse; Jeroen Groenendijk; Floris Roelofsen

2009-10-01T23:59:59.000Z

290

Graphic analysis and planning of electrical distribution systems  

Science Conference Proceedings (OSTI)

Techniques for computer modeling of electrical distribution systems have been available to utility engineers for years. The formation of a distribution data base can be a huge task because of the enormous number of components in a utility's distribution ...

Gwendolyn L. Fuehring

1980-07-01T23:59:59.000Z

291

Computer Accounts | Stanford Synchrotron Radiation Lightsource  

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

Accounts Each user group must have a computer account. Additionally, all persons using these accounts are responsible for understanding and complying with the terms outlined in the...

292

PNNL: Computational Sciences & Mathematics Search for Staff  

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

Search for Staff Search for a Computational Sciences & Mathematics staff member (Last, First) Search Search for staff member by Group View Alphabetical List of all CSM Staff (may...

293

Computational Biology at Oak Ridge National Laboratory  

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

Pipeline Domain Parser Prospect2 MIRA Welcome to Our Web Site We are the Computational Biology and Bioinformatics Group of the Biosciences Division of Oak Ridge National...

294

Lighting Group: Software  

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

Software Software Lighting Software The Lighting Group has developed several computer programs in the course of conducting research on energy efficient lighting. Several of these programs have proven useful outside the research environment. One of the most popular programs for advanced lighting applications is Radiance. For more information on this program and its availability, click on the link below. RADIANCE Radiance is a suite of programs for the analysis and visualization of lighting in design. The primary advantage of Radiance over simpler lighting calculation and rendering tools is that there are no limitations on the geometry or the materials that may be simulated. Radiance is used by architects and engineers to predict illumination, visual quality and appearance of innovative design spaces, and by researchers to evaluate new

295

Interagency Advanced Power Group Steering Group meeting minutes  

DOE Green Energy (OSTI)

This document contains presentation overviews and viewgraphs from a meeting military personnel on the subject of power generation and distribution systems for military applications. Mission analysis and directional plans were given for each working group (chemical, mechanical, electrical, nuclear, solar and systems). Attendees represented the US Air Force, Army, Navy, and NASA.

Not Available

1992-11-18T23:59:59.000Z

296

Nanomaterials Chemistry Group - CSD  

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

CSD CSD Organization Contact List Search Other Links CSD CSD Organization Contact List Search Other Links Selected Research and Development Projects The Nanomaterials Chemistry Group at Chemical Sciences Division, the Oak Ridge National Laboratory conducts fundamental research related to synthesis and characterization of nanoscopic materials as well as ionic liquids for fundamental investigation of separation and catalysis processes. This group also conducts the applied research related to the applications of nanomaterials in advanced scintillators for radiation sensing, catalysts for fuel cells, radioactive tracers for medical imaging, novel electrodes for energy storage, and sensing devices for biological agents. Extensive synthesis capabilities exist within the group for preparation of mesoporous materials (oxides and carbons), low-dimensional materials (e.g., quantum dots and nanowires), sol-gel materials, inorganic and hybrid monoliths (e.g., membranes), and nanocatalysts. Solvothermal, ionothermal, templating synthesis, chemical vapor deposition (CVD), and atomic layer deposition (ALD) methods are extensively utilized in the group for tailored synthesis of nanostructured materials. An array of techniques for characterizing physical and chemical properties related to separation and catalysis are in place or are currently being developed. This research program also takes advantage of the unique resources at ORNL such as small-angle x-ray scattering, small-angle neutron scattering at the High Flux Isotope Reactor and Spallation Neutron Source (SNS), structural analysis by a variety of electron microscopes (SEM, TEM, STEM, HRTEM) and powdered X-ray diffraction (XRD) techniques. A wide variety of other facilities for routine and novel techniques are also utilized including the Center for Nanophase Materials Science. Computational chemistry tools are employed to understand experimental results related to separation and other interfacial chemical processes and design better nanomaterials and ionic liquids. Commonly used methods include first principles density functional theory (DFT) and mixed quantum mechanical/molecular mechanical (QM/MM) techniques.

297

Equitable distribution  

Science Conference Proceedings (OSTI)

The problem of distributing available resources occurs in a great variety of networks, each with peculiarities of its own. Coal from mines has to be distributed to central dumps and to small yards. Ice cream must be distributed only to refrigerated stores ...

John A. Gosden

1963-05-01T23:59:59.000Z

298

Computational biology and high performance computing  

E-Print Network (OSTI)

Acknowledgements for Community White Paper in ComputationalComputational Biology white paper Is there strong objectionportions of community white paper on high end computing

Shoichet, Brian

2011-01-01T23:59:59.000Z

299

Computational biology and high performance computing  

E-Print Network (OSTI)

Biology and High Performance Computing Manfred Zorn, TeresaBiology and High Performance Computing Presenters: Manfred99-Portland High performance computing has become one of the

Shoichet, Brian

2011-01-01T23:59:59.000Z

300

USERDA computer program summaries. Numbers 177--239  

SciTech Connect

Since 1960 the Argonne Code Center has served as a U. S. Atomic Energy Commission information center for computer programs developed and used primarily for the solution of problems in nuclear physics, reactor design, reactor engineering and operation. The Center, through a network of registered installations, collects, validates, maintains, and distributes a library of these computer programs and publishes a compilation of abstracts describing them. In 1972 the scope of the Center's activities was officially expanded to include computer programs developed in all of the U. S. Atomic Energy Commission program areas and the compilation and publication of this report. The Computer Program Summary report contains summaries of computer programs at the specification stage, under development, being checked out, in use, or available at ERDA offices, laboratories, and contractor installations. Programs are divided into the following categories: cross section and resonance integral calculations; spectrum calculations, generation of group constants, lattice and cell problems; static design studies; depletion, fuel management, cost analysis, and reactor economics; space-independent kinetics; space--time kinetics, coupled neutronics-- hydrodynamics--thermodynamics and excursion simulations; radiological safety, hazard and accident analysis; heat transfer and fluid flow; deformation and stress distribution computations, structural analysis and engineering design studies; gamma heating and shield design programs; reactor systems analysis; data preparation; data management; subsidiary calculations; experimental data processing; general mathematical and computing system routines; materials; environmental and earth sciences; space sciences; electronics and engineering equipment; chemistry; particle accelerators and high-voltage machines; physics; controlled thermonuclear research; biology and medicine; and data. (RWR)

1975-10-01T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Renaissance Computing  

E-Print Network (OSTI)

We describe version 2 of RENCI PowerMon, a device that can be inserted between a computer power supply and the computers main board to measure power usage at each of the DC power rails supplying the board. PowerMon 2 provides a capability to collect accurate, frequent, and time-correlated measurements. Since the measurements occur after the AC power supply, this approach eliminates power supply efficiency and time-domain filtering perturbations of the power measurements. PowerMon 2 provides detail about the power consumption of the hardware subsystems connected to each of its eight measurement channles. The device fits in an internal 3.5 hard disk drive bay, thus allowing it to be used in a 1U server chassis. It cost less than $150 per unit to fabricate our small quantity of prototypes. 1

Daniel Bedard; Min Yeol Lim; Robert Fowler; Allan Porterfield

2009-01-01T23:59:59.000Z

302

Cloud Computing at NERSC  

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

Cloud Computing Energy Efficient Computing Exascale Computing Performance & Monitoring Tools Petascale Initiative Science Gateway Development Storage and IO Technologies Testbeds...

303

A computer music instrumentarium  

E-Print Network (OSTI)

Chapter 6. COMPUTERS: To Solder or Not toMusic Models : A Computer Music Instrumentarium . . . . .Interactive Computer Systems . . . . . . . . . . . . . . 101

Oliver La Rosa, Jaime Eduardo

2011-01-01T23:59:59.000Z

304

Compute Reservation Request Form  

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

Queue Look Queue Wait Times Hopper Queues and Policies Edison Queues and Policies Carver Queues and Policies Dirac Queues and Policies Compute Reservation Request Form Job Logs & Analytics Training & Tutorials Software Accounts & Allocations Policies Data Analytics & Visualization Data Management Policies Science Gateways User Surveys NERSC Users Group User Announcements Help Operations for: Passwords & Off-Hours Status 1-800-66-NERSC, option 1 or 510-486-6821 Account Support https://nim.nersc.gov accounts@nersc.gov 1-800-66-NERSC, option 2 or 510-486-8612 Consulting http://help.nersc.gov consult@nersc.gov 1-800-66-NERSC, option 3 or 510-486-8611 Home » For Users » Queues and Scheduling » Compute Reservation Request Form Compute Reservation Request Form

305

Display computers  

E-Print Network (OSTI)

A Display Computer (DC) is an everyday object: Display Computer = Display + Computer. The ?Display? part is the standard viewing surface found on everyday objects that conveys information or art. The ?Computer? is found on the same everyday object; but by its ubiquitous nature, it will be relatively unnoticeable by the DC user, as it is manufactured ?in the margins?. A DC may be mobile, moving with us as part of the everyday object we are using. DCs will be ubiquitous: ?effectively invisible?, available at a glance, and seamlessly integrated into the environment. A DC should be an example of Weiser?s calm technology: encalming to the user, providing peripheral awareness without information overload. A DC should provide unremarkable computing in support of our daily routines in life. The nbaCub (nightly bedtime ambient Cues utility buddy) prototype illustrates a sample application of how DCs can be useful in the everyday environment of the home of the future. Embedding a computer into a toy, such that the display is the only visible portion, can present many opportunities for seamless and nontraditional uses of computing technology for our youngest user community. A field study was conducted in the home environment of a five-year old child over ten consecutive weeks as an informal, proof of concept of what Display Computers for children can look like and be used for in the near future. The personalized nbaCub provided lightweight, ambient information during the necessary daily routines of preparing for bed (evening routine) and preparing to go to school (morning routine). To further understand the child?s progress towards learning abstract concepts of time passage and routines, a novel ?test by design? activity was included. Here, the role of the subject changed to primary designer/director. Final post-testing showed the subject knew both morning and bedtime routines very well and correctly answered seven of eight questions based on abstract images of time passage. Thus, the subject was in the process of learning the more abstract concept of time passage, but was not totally comfortable with the idea at the end of the study.

Smith, Lisa Min-yi Chen

306

Report of the RHIC Planning Group  

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

Planning Group PACDAC Invited R. Betts P. Jacobs S.-Y. Lee J. Nagle BRAHMS F. Videbaek J.H. Lee Computing B. Gibbard T. Throwe Theory D. Kharzeev W. Vogelsang Accelerator J....

307

High Performance Computing  

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

Information Science, Computing, Applied Math High Performance Computing High Performance Computing Providing world-class high performance computing capability that enables...

308

NEWTON's Computer Science Videos  

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

Computer Science Videos Do you have a great computer science video? Please click our Ideas page. Featured Videos: Computer Science Videos from Purdue Computer Science Videos from...

309

Distribution Screening for Distributed Generation  

Science Conference Proceedings (OSTI)

As the deployment of renewable distributed generation increases, the need for traditional energy providers to interact with these resources increases. Detailed modeling and simulation of the distribution and distributed resources is a critical element to better analyze, understand and predict these interactions. EPRI has developed a tool for such analysis called OpenDSS. In addition, as part of the renewable integration program an applet was created for screening distributed generation (DG). This report ...

2009-12-23T23:59:59.000Z

310

Future computing needs for Fermilab  

SciTech Connect

The following recommendations are made: (1) Significant additional computing capacity and capability beyond the present procurement should be provided by 1986. A working group with representation from the principal computer user community should be formed to begin immediately to develop the technical specifications. High priority should be assigned to providing a large user memory, software portability and a productive computing environment. (2) A networked system of VAX-equivalent super-mini computers should be established with at least one such computer dedicated to each reasonably large experiment for both online and offline analysis. The laboratory staff responsible for mini computers should be augmented in order to handle the additional work of establishing, maintaining and coordinating this system. (3) The laboratory should move decisively to a more fully interactive environment. (4) A plan for networking both inside and outside the laboratory should be developed over the next year. (5) The laboratory resources devoted to computing, including manpower, should be increased over the next two to five years. A reasonable increase would be 50% over the next two years increasing thereafter to a level of about twice the present one. (6) A standing computer coordinating group, with membership of experts from all the principal computer user constituents of the laboratory, should

Not Available

1983-12-01T23:59:59.000Z

311

TEC Working Group Topic Groups Archives  

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

The following Topic Groups are no longer active; however, related documents and notes for these archived Topic Groups are available through the following links:

312

The failure of TCP in high-performance computational grids  

Science Conference Proceedings (OSTI)

Distributed computational grids depend on TCP to ensure reliable end-to-end communication between nodes across the wide-area network (WAN). Unfortunately, TCP performance can be abysmal even when buffers on the end hosts are manually optimized. Recent ... Keywords: network traffic characterization, self-similarity,TCP, computational grid, distributed computing

W. Feng; P. Tinnakornsrisuphap

2000-11-01T23:59:59.000Z

313

Distribution System Losses Evaluation  

Science Conference Proceedings (OSTI)

Currently, there is not an industry standard on how utilities calculate and account for electrical losses and reductions in electric system losses. Computer models used to analyze power flows typically only include the primary components of the distribution system infrastructure. More detailed electric system models can benefit utilities by providing more accurate loss calculations as well as benefits for system planning and engineering. The utility industry could benefit from having a consistent and uni...

2008-12-16T23:59:59.000Z

314

Institute of Computer Science Computational experience with ...  

E-Print Network (OSTI)

Institute of Computer Science. Academy of Sciences of the Czech Republic. Computational experience with modified. conjugate gradient methods for.

315

# Energy Measuremenfs Group  

Office of Legacy Management (LM)

ri EECE ri EECE # Energy Measuremenfs Group SUMMARY REPORT . AiRIAL R4DIOLOGICAL SURVEY - NIAGARA FALLS AREA NIAGARA FALLS, NEh' YORK DATE OF SURVEY: SEPTEMBER 1979 APPROVED FOR DISTRIBUTION: P Stuart, EC&G, Inc. . . Herbirt F. Hahn, Department of Energy PERFDRflED BY EGtf, INC. UNDER CONTRACT NO. DE-AHO&76NV01163 WITH THE UNITED STATES DEPARTMENT OF ENERGY II'AFID 010 November 30, 1979 - The Aerial Measurements System (A%), operated by EC&t, Inc< for the Un i ted States Department of Energy, was used during November 1976 to conduct an exploratory aerial radiological survey in-the greater Niagara Fails area. The purpose of that survey was to identify locations having concentrations of terrestrial radioactivity not typical of the radiation

316

NIST Optical Radiation Group  

Science Conference Proceedings (OSTI)

Optical Radiation Group. Welcome. The Optical Radiation Group maintains, improves, and disseminates the national scales ...

2013-07-29T23:59:59.000Z

317

Security Technologies Group  

Science Conference Proceedings (OSTI)

Security Technologies Group. Welcome. Our group develops measurement science in support of performance-based standards ...

2012-10-24T23:59:59.000Z

318

ComputationalComputational ScienceScience  

E-Print Network (OSTI)

ComputationalComputational ScienceScience KenKen HawickHawick k.a.k.a.hawickhawick@massey.ac.nz@massey.ac.nz Massey UniversityMassey University #12;Computational Science / eScienceComputational Science / eScience Computational Science concerns the application of computer science to physics, mathematics, chemistry, biology

Hawick, Ken

319

The Computational Physics Program of the national MFE Computer Center  

Science Conference Proceedings (OSTI)

Since June 1974, the MFE Computer Center has been engaged in a significant computational physics effort. The principal objective of the Computational Physics Group is to develop advanced numerical models for the investigation of plasma phenomena and the simulation of present and future magnetic confinement devices. Another major objective of the group is to develop efficient algorithms and programming techniques for current and future generations of supercomputers. The Computational Physics Group has been involved in several areas of fusion research. One main area is the application of Fokker-Planck/quasilinear codes to tokamaks. Another major area is the investigation of resistive magnetohydrodynamics in three dimensions, with applications to tokamaks and compact toroids. A third area is the investigation of kinetic instabilities using a 3-D particle code; this work is often coupled with the task of numerically generating equilibria which model experimental devices. Ways to apply statistical closure approximations to study tokamak-edge plasma turbulence have been under examination, with the hope of being able to explain anomalous transport. Also, we are collaborating in an international effort to evaluate fully three-dimensional linear stability of toroidal devices. In addition to these computational physics studies, the group has developed a number of linear systems solvers for general classes of physics problems and has been making a major effort at ascertaining how to efficiently utilize multiprocessor computers. A summary of these programs are included in this paper. 6 tabs.

Mirin, A.A.

1989-01-01T23:59:59.000Z

320

Hydrology Group - UNSAT-H  

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

H H Recharge Estimation UNSAT-H is a FORTRAN computer code used to simulate the one-dimensional flow of water, vapor, and heat in soils. The code addresses the processes of precipitation, evaporation, plant transpiration, storage, and deep drainage. The UNSAT-H computer code is used to understand the movement of water, heat, and vapor in soils so better decisions can be made about land use, waste disposal, and climate change. Example Tests and Typical Applications include studies of the water balance behavior of surface covers over shallow land burial waste sites and studies of land disturbance effects on recharge rates. The UNSAT-H computer code is managed by the Hydrology Group at the Pacific Northwest National Laboratory (PNNL). PNNL is a U.S. Department of Energy

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


321

Research Activities in the Hyperspectral Computing  

E-Print Network (OSTI)

hyperspectral images using high performance computing architectures; this research has been funded and Processing (2009, 2010, 2011 and 2012), and the SPIE Conference on High Performance Computing in Remote Sensing (2011 and 2012). The group has edited the first textbook focused on high performance computing

Chang, Chein-I

322

Distribution Workshop  

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

On September 24-26, 2012, the GTT presented a workshop on grid integration on the distribution system at the Sheraton Crystal City near Washington, DC.

323

NSLS Computer Systems  

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

Computer Systems Computer Systems Micro Systems WorkStation Applications Network Configuration Documents The National Synchrotron Light Source facility at the Brookhaven National Laboratory in New York, consists of two storage rings, one for VUV operating at 800 Mev and one for XRAY at 2.8 Gev and a common injection system comprised of a linear accelerator and a Booster ring. Hardware Architecture The hardware architecture of the present control system follows the current trend seen in many accelerator facilities. It is a two-level distributed system consisting of HP/900 series workstations connected by the standard ethernet to VME-based microprocessor subsystems. All the workstations have local disk and sufficient memory for fast response. Workstations are used as file server, back-up file server and for program development and other

324

The seamless computing environment  

SciTech Connect

Oak Ridge National Laboratory (ORNL), Sandia National Laboratories (SNL), and Pittsburgh Supercomputing Center (PSC) are in the midst of a project through which their supercomputers are linked via high speed networks. The goal of this project is to solve national security and scientific problems too large to run on a single machine. This project, as well as the desire to maximize the use of high performance computing systems, has provided the impetus to develop and implement software tools and infrastructure to automate the tasks associated with running codes on one or more heterogeneous machines from a geographically distributed pool. The ultimate goal of this effort is the Seamless Computing Environment (SCE). SCE is a production environment to which a user submits a job and receives results without having to worry about scheduling resources or even which resources the system uses. The compilation, data migration, scheduling, and execution will take place with minimal user intervention.

Sheehan, T.J.; Papadopoulos, P.M.; Alexander, R. [and others

1997-06-01T23:59:59.000Z

325

RATIO COMPUTER  

DOE Patents (OSTI)

An electronic computer circuit is described for producing an output voltage proportional to the product or quotient of tbe voltages of a pair of input signals. ln essence, the disclosed invention provides a computer having two channels adapted to receive separate input signals and each having amplifiers with like fixed amplification factors and like negatlve feedback amplifiers. One of the channels receives a constant signal for comparison purposes, whereby a difference signal is produced to control the amplification factors of the variable feedback amplifiers. The output of the other channel is thereby proportional to the product or quotient of input signals depending upon the relation of input to fixed signals in the first mentioned channel.

Post, R.F.

1958-11-11T23:59:59.000Z

326

Computational Combustion  

DOE Green Energy (OSTI)

Progress in the field of computational combustion over the past 50 years is reviewed. Particular attention is given to those classes of models that are common to most system modeling efforts, including fluid dynamics, chemical kinetics, liquid sprays, and turbulent flame models. The developments in combustion modeling are placed into the time-dependent context of the accompanying exponential growth in computer capabilities and Moore's Law. Superimposed on this steady growth, the occasional sudden advances in modeling capabilities are identified and their impacts are discussed. Integration of submodels into system models for spark ignition, diesel and homogeneous charge, compression ignition engines, surface and catalytic combustion, pulse combustion, and detonations are described. Finally, the current state of combustion modeling is illustrated by descriptions of a very large jet lifted 3D turbulent hydrogen flame with direct numerical simulation and 3D large eddy simulations of practical gas burner combustion devices.

Westbrook, C K; Mizobuchi, Y; Poinsot, T J; Smith, P J; Warnatz, J

2004-08-26T23:59:59.000Z

327

High Performance Computing  

Science Conference Proceedings (OSTI)

High Performance Computing. Summary: High Performance Computing (HPC) enables work on challenging problems that ...

2012-03-05T23:59:59.000Z

328

Debugging a high performance computing program  

SciTech Connect

Methods, apparatus, and computer program products are disclosed for debugging a high performance computing program by gathering lists of addresses of calling instructions for a plurality of threads of execution of the program, assigning the threads to groups in dependence upon the addresses, and displaying the groups to identify defective threads.

Gooding, Thomas M.

2013-08-20T23:59:59.000Z

329

The K computer: Japanese next-generation supercomputer development project  

Science Conference Proceedings (OSTI)

The K computer is a distributed memory super-computer system consisting of more than 800 compute nodes which is being developed by RIKEN as a Japanese national project. Its performance is aimed at achieving 10 peta-flops sustained in the LINPACK benchmark. ... Keywords: K computer, next-generation supercomputer, sparc64 viiifx, tofu interconnect network

Mitsuo Yokokawa; Fumiyoshi Shoji; Atsuya Uno; Motoyoshi Kurokawa; Tadashi Watanabe

2011-08-01T23:59:59.000Z

330

Network-theoretic classification of parallel computation patterns  

Science Conference Proceedings (OSTI)

Parallel computation in a high-performance computing environment can be characterized by the distributed memory access patterns of the underlying algorithm. During execution, networks of compute nodes exchange messages that indirectly exhibit these access ... Keywords: communication patterns, computational dwarves, graph theory, network theory, pattern recognition

Sean Whalen; Sophie Engle; Sean Peisert; Matt Bishop

2012-05-01T23:59:59.000Z

331

COMPUTER SCIENCE EECS Department  

E-Print Network (OSTI)

COMPUTER SCIENCE EECS Department The Electrical Engineering and Computer Science (EECS) Department at WSU offers undergraduate degrees in electrical engineering, computer engineering and computer science. The EECS Department offers master of science degrees in computer science, electrical engineering

332

Computer Science UNDERGRADUATE  

E-Print Network (OSTI)

447 Computer Science UNDERGRADUATE PROGRAMS The Department of Computer Science provides undergraduate instruction leading to the bachelor's degree in computer science. This program in computer science is accredited by the Computer Science Accreditation Board (CSAB), a specialized accrediting body recognized

Suzuki, Masatsugu

333

COMPUTER ENGINEERING EECS Department  

E-Print Network (OSTI)

COMPUTER ENGINEERING EECS Department The Electrical Engineering and Computer Science (EECS) Department at WSU offers undergraduate degrees in electrical engineering, computer engineering and computer science. The EECS Department offers Master of Science degrees in computer science, electrical engineering

334

TEC Working Group Topic Groups Archives Consolidated Grant Topic Group |  

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

Consolidated Grant Topic Consolidated Grant Topic Group TEC Working Group Topic Groups Archives Consolidated Grant Topic Group The Consolidated Grant Topic Group arose from recommendations provided by the TEC and other external parties to the DOE Senior Executive Transportation Forum in July 1998. It was proposed that the consolidation of multiple funding streams from numerous DOE sources into a single grant would provide a more equitable and efficient means of assistance to States and Tribes affected by DOE nuclear material shipments. The group serves as an important vehicle for DOE senior managers to assess and incorporate stakeholder input into the development of a consolidated funding vehicle for transportation activities, should DOE implement such a program. Some of the major issues under consideration by the Consolidated Grant

335

The autonomous concurrent strategy for large scale CAE computation  

Science Conference Proceedings (OSTI)

The paper presents the Agent-Oriented technology for running the parallel CAE computation. Fast and effective distributed diffusion scheduling is available that minimizes computation and communication time necessary for task governing and provides transparency ...

P. Uhruski; W. Toporkiewicz; R. Schaefer; M. Grochowski

2006-05-01T23:59:59.000Z

336

Duality and Recycling Computing in Quantum Computers  

E-Print Network (OSTI)

Quantum computer possesses quantum parallelism and offers great computing power over classical computer \\cite{er1,er2}. As is well-know, a moving quantum object passing through a double-slit exhibits particle wave duality. A quantum computer is static and lacks this duality property. The recently proposed duality computer has exploited this particle wave duality property, and it may offer additional computing power \\cite{r1}. Simply put it, a duality computer is a moving quantum computer passing through a double-slit. A duality computer offers the capability to perform separate operations on the sub-waves coming out of the different slits, in the so-called duality parallelism. Here we show that an $n$-dubit duality computer can be modeled by an $(n+1)$-qubit quantum computer. In a duality mode, computing operations are not necessarily unitary. A $n$-qubit quantum computer can be used as an $n$-bit reversible classical computer and is energy efficient. Our result further enables a $(n+1)$-qubit quantum computer to run classical algorithms in a $O(2^n)$-bit classical computer. The duality mode provides a natural link between classical computing and quantum computing. Here we also propose a recycling computing mode in which a quantum computer will continue to compute until the result is obtained. These two modes provide new tool for algorithm design. A search algorithm for the unsorted database search problem is designed.

Gui Lu Long; Yang Liu

2007-08-15T23:59:59.000Z

337

Machine learning for computational sustainability  

Science Conference Proceedings (OSTI)

To avoid ecological collapse, we must manage Earth's ecosystems sustainably. Viewed as a control problem, the two central challenges of ecosystem management are to acquire a model of the system that is sufficient to guide good decision making and then ... Keywords: hidden Markov models,computational sustainability,species distribution models,dynamical ecosystem models

Tom Dietterich; Ethan Dereszynski; Rebecca Hutchinson; Dan Sheldon

2012-06-01T23:59:59.000Z

338

TEC Working Group Topic Groups Tribal  

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

The Tribal Topic Group was established in January 1998 to address government-to-government consultation between DOE and Indian Tribes affected by its transportation activities. The group focuses on...

339

Inorganic Materials Group  

Science Conference Proceedings (OSTI)

... experimental and computational materials science research. This work will help the US construction industry be competitive in advanced concrete ...

2011-11-08T23:59:59.000Z

340

Information Systems Group Homepage  

Science Conference Proceedings (OSTI)

... computational methods, data/knowledge mining tools, and semantic services using systems-based approaches, to advance measurement science ...

2012-06-26T23:59:59.000Z

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


341

Ductless Hydronic Distribution  

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

DUCTLESS HYDRONIC DUCTLESS HYDRONIC DISTRIBUTION Alliance for Residential Building Innovation David Springer, Davis Energy Group Context  Target: Builders of high performance new homes & deep retrofits  Why is this technology key to meeting performance goals of future homes?  Distribution Efficiency * Distribution efficiency for well insulated, tight ducts in attics ≈ 85% * Duct energy losses drives placement of ducts inside conditioned space, which adds cost and interferes with structure and architecture * Ductless hydronic systems can approach 100% distribution efficiency; piping needs little space  Delivery Energy * Fans: 0.58 W/cfm or 9 (heating) to 27 (cooling) W/kBtuh * Pumps: 8 W/gpm, or 0.8 W/kBtuh Context  Sizing * Conventional systems tend to be too large for low load homes

342

Computer simulation of neutron capture therapy.  

E-Print Network (OSTI)

Analytical methods are developed to simulate on a large digital computer the production and use of reactor neutron beams f or boron capture therapy of brain tumors. The simulation accounts for radiation dose distributions ...

Olson, Arne Peter

1967-01-01T23:59:59.000Z

343

COMPUTABLE CATEGORICITY VERSUS RELATIVE COMPUTABLE CATEGORICITY  

E-Print Network (OSTI)

COMPUTABLE CATEGORICITY VERSUS RELATIVE COMPUTABLE CATEGORICITY RODNEY G. DOWNEY, ASHER M. KACH, STEFFEN LEMPP, AND DANIEL D. TURETSKY Abstract. We study the notion of computable categoricity of computable structures, comparing it especially to the notion of relative computable cate- goricity and its

344

Engineered Fire Safety Group  

Science Conference Proceedings (OSTI)

Engineered Fire Safety Group. Welcome. ... Employment/Research Opportunities. Contact. Jason Averill, Leader. Engineered Fire Safety Group. ...

2012-06-05T23:59:59.000Z

345

Energy Research Group Homepage  

Science Conference Proceedings (OSTI)

Energy Research Group. Welcome. The newest Group in the CNST develops instruments designed to reveal the nanoscale ...

2012-10-02T23:59:59.000Z

346

Unclassified Distribution  

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

63 1 Unclassified Distribution UNIVERSITY :OF CALIFORNU Radiation Lab oratory Contract No, W-7405-eng-48 THE DETECTION OF U T I F I C I B L L Y PRODUCED WOTOMESONS WITH COUNTERS *...

347

Special Distribution  

Office of Legacy Management (LM)

Special Distribution Special Distribution Issued: December 1977 ',, Radiological Survey and Decontamination of the Former Main Technical Area (TA-1) at Los Alamos, New Mexico Compiled by A. John Ahlquist Alan K. Stoker Linda K. Trocki c laboratory of, the University of California LOS ALAMOS, NEW MEXICO 87545 An Alfirmdve Action/Equal Opportunity Employer ..-_- .-- .--.-. c T -,--... _ _._-r..l __,.. - .-,_.. ..- _._ -- .--. " . . _ . - . c- - . . . _ -. . _ . - . - . _ - - n - _ _~ ~_. __ _ ~~_ --..&e+ L.';; CONTENTS ABSTRACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._____ 1 EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._... _._ 2 I. BACKGROUND .............................................. 15

348

Exploratory Experimentation and Computation  

SciTech Connect

We believe the mathematical research community is facing a great challenge to re-evaluate the role of proof in light of recent developments. On one hand, the growing power of current computer systems, of modern mathematical computing packages, and of the growing capacity to data-mine on the Internet, has provided marvelous resources to the research mathematician. On the other hand, the enormous complexity of many modern capstone results such as the Poincare conjecture, Fermat's last theorem, and the classification of finite simple groups has raised questions as to how we can better ensure the integrity of modern mathematics. Yet as the need and prospects for inductive mathematics blossom, the requirement to ensure the role of proof is properly founded remains undiminished.

Bailey, David H.; Borwein, Jonathan M.

2010-02-25T23:59:59.000Z

349

Peer-assessment in group projects: is it worth it?  

Science Conference Proceedings (OSTI)

The incorporation of group projects into university computing courses is wide spread. However, there is evidence that students undertaking such projects express concern about the way in which marks awarded for outcomes produced by the group collaboratively ...

Geoffrey J. Kennedy

2005-01-01T23:59:59.000Z

350

Monodromy analysis of the computational power of the Ising topological quantum computer  

E-Print Network (OSTI)

We show that all quantum gates which could be implemented by braiding of Ising anyons in the Ising topological quantum computer preserve the n-qubit Pauli group. Analyzing the structure of the Pauli group's centralizer, also known as the Clifford group, for n\\geq 3 qubits, we prove that the image of the braid group is a non-trivial subgroup of the Clifford group and therefore not all Clifford gates could be implemented by braiding. We show explicitly the Clifford gates which cannot be realized by braiding estimating in this way the ultimate computational power of the Ising topological quantum computer.

Andre Ahlbrecht; Lachezar S. Georgiev; Reinhard F. Werner

2009-11-13T23:59:59.000Z

351

Fermilab Steering Group Report  

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

1 1 Executive Summary: A Plan for Fermilab In This Section: Executive Summary: A Plan for Fermilab Guidelines The Steering Group's proposed plan Executive Summary: A Plan for Fermilab The Fermilab Steering Group has developed a plan to keep U.S. accelerator-based particle physics on the pathway to discovery, both at the Terascale with the LHC and the ILC and in the domain of neutrinos and precision physics with a high-intensity accelerator. The plan puts discovering Terascale physics with the LHC and the ILC as Fermilab's highest priority. While supporting ILC development, the plan creates opportunities for exciting science at the intensity frontier. If the ILC remains near the Global Design effort's technically driven timeline, Fermilab would continue neutrino science with the NOνA experiment, using the NuMI (Neutrinos at the Main Injector) proton plan, scheduled to begin operating in 2011. If ILC construction must wait somewhat longer, Fermilab's plan proposes SNuMI, an upgrade of NuMI to create a more powerful neutrino beam. If the ILC start is postponed significantly, a central feature of the proposed Fermilab plan calls for building an intense proton facility, Project X, consisting of a linear accelerator with the currently planned characteristics of the ILC combined with Fermilab's existing Recycler Ring and the Main Injector accelerator. The major component of Project X is the linac. Cryomodules, radio-frequency distribution, cryogenics and instrumentation for the linac are the same as or similar to those used in the ILC at a scale of about one percent of a full ILC linac.

352

Towards jungle computing with Ibis/Constellation  

Science Conference Proceedings (OSTI)

The scientific computing landscape is becoming more and more complex. Besides traditional supercomputers and clusters, scientists can also apply grid and cloud infrastructures. Moreover, the current integration of many-core technologies such as GPUs ... Keywords: distributed, heterogeneous and hierarchical computing

Jason Maassen; Niels Drost; Henri E. Bal; Frank J. Seinstra

2011-06-01T23:59:59.000Z

353

Agent-based accountable grid computing systems  

Science Conference Proceedings (OSTI)

Accountability is an important aspect of any computer system. It assures that every action executed in the system can be traced back to some entity. Accountability is even more crucial for assuring the safety and security of grid systems, given the very ... Keywords: Accountability, Agents, Distributed denial of service attack, Grid computing

Wonjun Lee; Anna Squicciarini; Elisa Bertino

2013-08-01T23:59:59.000Z

354

Computer/Controller 1588  

Science Conference Proceedings (OSTI)

... Computer/Controller? What is a computer or controller? ... Computer/controllers in a system supporting IEEE 1588 will typically include a 1588 clock. ...

2010-10-29T23:59:59.000Z

355

Computer Forensics In Forensis  

E-Print Network (OSTI)

U.N. In Proceedings of CMAD IV: Computer Misuse and Anomaly4] J. P. Anderson. Computer Security Threat Monitoring andof the Fifth Annual Computer Security Applications

Peisert, Sean; Bishop, Matt; Marzullo, Keith

2008-01-01T23:59:59.000Z

356

Computational biology and high performance computing  

E-Print Network (OSTI)

Paper in Computational Biology The First Step Beyond theM . Glaeser, Mol. & Cell Biology, UCB and Life SciencesLBNL-44460 Computational Biology and High Performance

Shoichet, Brian

2011-01-01T23:59:59.000Z

357

Fermilab | Science at Fermilab | Computing | Grid Computing  

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

of Fermilab's Computing Division looked ahead to experiments like those at the Large Hadron Collider, which would collect more data than any computing center in existence could...

358

PHYSICS, COMPUTER SCIENCE AND MATHEMATICS DIVISION. ANNUAL REPORT, 1 JAN. - 31 DEC. 1976  

E-Print Network (OSTI)

Steele J. Wagner 'J COMPUTER SCIENCE AND ApPLIED MATHEMATICSS. White Peter M. Wood COMPUTER CENTER STAFF U. F. J. E. P.Distributed Data Management and Computer Networks, LBL-S3lS,

Authors, Various

2010-01-01T23:59:59.000Z

359

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

... but much simpler algorithms. To facilitate these advantages, XMT was set up as a clean-slate design supporting the foremost theory of parallel algorithms.

360

Scientists, engineers, and computer science; industry and research groups  

Science Conference Proceedings (OSTI)

The Communications Web site, http://cacm.acm.org, features more than a dozen bloggers in the BLOG@CACM community. In each issue of Communications, we'll publish selected posts or excerpts.twitterFollow us on Twitter ...

Mark Guzdial; Greg Linden

2011-03-01T23:59:59.000Z

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


361

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

The meaning of 196884 = 196883 + 1 (part I). John Mckay, Concordia University. September 20th, 2004. Abstract: I shall discuss my work over the past 25 years...

362

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

An n-dimensional representation for the Dirac delta "function". Edgardo S. Cheb- Terrab. Waterloo Maple Inc Theoretical Physics Department, UERJ - Brazil

363

Computer Algebra Group at SFU - Meetings, Colloquia - CECM  

E-Print Network (OSTI)

We usually look for that information in handbooks like Abramowitz & Stegun etc. It is clear however that most of this information found in textbooks is already in...

364

Generic SBDD using Computational Group Theory Ian P. Gent1  

E-Print Network (OSTI)

satisfaction terms, Backtrack Searching in the Presence of Symmetry [2, 3] contains many SBDD ideas using a recursive search, which descends this tree, entering each node once for every way of mapping of SBDD is to perform `dominance checks' at each node in a search tree to ensure that no symmetrically

St Andrews, University of

365

Properties of Intra-group Stars and Galaxies in Galaxy Groups: "Normal" versus "Fossil" Groups  

E-Print Network (OSTI)

Cosmological LCDM simulations of 12 M_vir~10^14 Msun galaxy groups have been performed, invoking star formation, chemical evolution with non-instantaneous recycling, metallicity dependent radiative cooling, strong star-burst driven galactic super-winds and effects of a meta-galactic UV field. At z=0, intra-group light (IGL) fractions are found to be 12-45%. Low values refer to groups with only a small difference between the R-band magnitudes of the first and second ranked group galaxy, large are typical of "fossil" groups (FGs). The IG stars in the 4 FGs are 0.3-0.5 Gyr older than in the 8 nonFGs. For the IGL, B-R=~1.4, in good agreement with observations. For FGs/nonFGs the iron abundance of the IG stars is slightly sub-solar in the central parts (r~100 kpc) decreasing to about 40% solar at about 0.5 r_vir The IG stars are alpha-element enhanced with [O/Fe] increasing with r, and an overall [O/Fe]~0.45, indicating predominant SNII enrichment. The velocity distributions of the IG stars and group galaxies are, at r>~30 kpc, significantly more radially anisotropic for FGs than for nonFGs. So a characteristic of FG formation, apart from formation time (D'Onghia et al.), may be the "initial" velocity distribution of the group galaxies. For FGs one can dynamically infer the (dark matter dominated) mass distribution of the groups all the way to r_vir, from the kinematics of the IG stars or group galaxies. For the nonFGs this method overestimates the group mass at r>~200 kpc, by up to a factor of two at r_vir. This is interpreted as FGs being, in general, more relaxed than nonFGs. Finally, FGs of the above M_vir should host ~500 planetary nebulae at projected distances between 100 and 1000 kpc from the first ranked galaxy. All results appear consistent with the FG formation scenario of D'Onghia et al.

Jesper Sommer-Larsen

2005-09-28T23:59:59.000Z

366

CALCULATION OF EFFECT OF FUEL BURNUP ON FUEL AND POISON DISTRIBUTIONS AND ON FLUX DISTRIBUTION IN THE MARINE REACTOR  

SciTech Connect

The changes in fuel and poison distributions and the changes in flux shape which accompany the consumption of fuel are studied. The technique employed is a perturbation calculation based on a one-velocity group treatment of the neutrons. The geometry is a spherical core surrounded by an infinite reflector. The programming forms for the IBM-650 which performs the computations using the Wolontis interpretative system are included. Two sample calculations were worked out using the code described and the results are plotted. (M.H.R.)

Hinman, G.

1957-01-29T23:59:59.000Z

367

A distributed bio-inspired method for multisite grid mapping  

Science Conference Proceedings (OSTI)

Computational grids assemble multisite and multiowner resources and represent the most promising solutions for processing distributed computationally intensive applications, each composed by a collection of communicating tasks. The execution of an application ...

I. De Falco; A. Della Cioppa; U. Scafuri; E. Tarantino

2010-01-01T23:59:59.000Z

368

TEC Working Group Topic Groups Security  

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

The Security Topic group is comprised of regulators, law enforcement officials, labor and industry representatives and other subject matter experts concerned with secure transport of spent nuclear...

369

Computational Enhancement to Programmers  

E-Print Network (OSTI)

Computing according to laymens procedures is changed to contain a paradigm of inoptimality in the high level and assembled code. The code is changed to maximize the flow of information contained in the electrons so that they function more as a group and without unwanted coherence effects. Exponential effects are suspected in the improved operation of the programming. From a laymens point of view the maladjustment of substandard code could result in a factor of a thousand in such programs as Microsoft Works which can be speed intensive.

Gordon Chalmers

2006-08-04T23:59:59.000Z

370

NREL: Distributed Grid Integration - Projects  

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

Projects Projects Photo of two NREL engineers sitting in front of two computer monitors, discussing a project. NREL engineers work on data capture for micro-grid synchronization waveforms. Photo by Dennis Schroeder, NREL. NREL's distributed energy projects support the integration of new technologies into the electric power grid. This work involves industry, academia, other national laboratories, and various standards organizations. Learn more about our projects: Codes and standards Data collection and visualization Hawaii Clean Energy Initiative Microgrids Power systems modeling Solar Distributed Grid Integration (SunShot) Technology development Vehicle-to-Grid (V2G) Wind2Battery Printable Version Distributed Grid Integration Home Capabilities Projects Codes & Standards

371

On simulating multivariate non-normal distributions from the generalized lambda distribution  

Science Conference Proceedings (OSTI)

The class of generalized lambda distributions (GLDs) is primarily used for modeling univariate real-world data. The GLD has not been as popular as some other methods for simulating observations from multivariate distributions because of computational ... Keywords: Correlated data, Generalized lambda distribution, Moments, Simulation

Todd C. Headrick; Abdel Mugdadi

2006-07-01T23:59:59.000Z

372

Police Use of Computers  

E-Print Network (OSTI)

Colton, K. (1978). Police Computer Systems. Lexington, MA:The impact and use of computer technology by the police.K.L. (1986). People and Computers: The Impacts of Computing

Northrop, Alana

1993-01-01T23:59:59.000Z

373

Protein Informatics Group  

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

are in development of computational tools for solving problems from molecular biology. Our work ranges from construction of mathematicalstatistical models to development...

374

Distributed Optimization System  

DOE Patents (OSTI)

A search system and method for controlling multiple agents to optimize an objective using distributed sensing and cooperative control. The search agent can be one or more physical agents, such as a robot, and can be software agents for searching cyberspace. The objective can be: chemical sources, temperature sources, radiation sources, light sources, evaders, trespassers, explosive sources, time dependent sources, time independent sources, function surfaces, maximization points, minimization points, and optimal control of a system such as a communication system, an economy, a crane, and a multi-processor computer.

Hurtado, John E. (Albuquerque, NM); Dohrmann, Clark R. (Albuquerque, NM); Robinett, III, Rush D. (Tijeras, NM)

2004-11-30T23:59:59.000Z

375

NREL: Distributed Grid Integration - Codes and Standards  

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

generation and storage sources (or "distributed resources," a key aspect of the Smart Grid) into the electric power system. There are two main groups, or families, of...

376

Lighting Group: What's New  

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

What's New What's New in the Lighting Group For more information on what's new in the Lighting Group, please contact: Francis Rubinstein Lighting Group Leader (510) 486-4096...

377

The ATLAS Distributed Analysis System  

E-Print Network (OSTI)

In the LHC operations era, analysis of the multi-petabyte ATLAS data sample by globally distributed physicists is a challenging task. To attain the required scale the ATLAS Computing Model was designed around the concept of grid computing, realized in the Worldwide LHC Computing Grid (WLCG), the largest distributed computational resource existing in the sciences. The ATLAS experiment currently stores over 140 PB of data and runs about 140,000 concurrent jobs continuously at WLCG sites. During the first run of the LHC, the ATLAS Distributed Analysis (DA) service has operated stably and scaled as planned. More than 1600 users submitted jobs in 2012, with 2 million or more analysis jobs per week, peaking at about a million jobs per day. The system dynamically distributes popular data to expedite processing and maximally utilize resources. The reliability of the DA service is high but steadily improving; grid sites are continually validated against a set of standard tests, and a dedicated team of expert shifters ...

Legger, F; The ATLAS collaboration; Pacheco Pages, A; Stradling, A

2013-01-01T23:59:59.000Z

378

Towards Exascale Distributed Data Management  

Science Conference Proceedings (OSTI)

??Exascale eScience infrastructures? will face important and critical challenges, both from computational and data perspectives. Increasingly complex and parallel scientific codes will lead to the production of a huge amount of data. The ... Keywords: data analysis, data replication, distributed data management, metadata management, parallel I/O

Giovanni Aloisio; Sandro Fiore

2009-11-01T23:59:59.000Z

379

A distributed particle simulation code in C++  

Science Conference Proceedings (OSTI)

Although C++ has been successfully used in a variety of computer science applications, it has just recently begun to be used in scientific applications. We have found that the object-oriented properties of C++ lend themselves well to scientific computations by making maintenance of the code easier, by making the code easier to understand, and by providing a better paradigm for distributed memory parallel codes. We describe here aspects of developing a particle plasma simulation code using object-oriented techniques for use in a distributed computing environment. We initially designed and implemented the code for serial computation and then used the distributed programming toolkit ISIS to run it in parallel. In this connection we describe some of the difficulties presented by using C++ for doing parallel and scientific computation.

Forslund, D.W.; Wingate, C.A.; Ford, P.S.; Junkins, J.S.; Pope, S.C.

1992-01-01T23:59:59.000Z

380

A distributed particle simulation code in C++  

SciTech Connect

Although C++ has been successfully used in a variety of computer science applications, it has just recently begun to be used in scientific applications. We have found that the object-oriented properties of C++ lend themselves well to scientific computations by making maintenance of the code easier, by making the code easier to understand, and by providing a better paradigm for distributed memory parallel codes. We describe here aspects of developing a particle plasma simulation code using object-oriented techniques for use in a distributed computing environment. We initially designed and implemented the code for serial computation and then used the distributed programming toolkit ISIS to run it in parallel. In this connection we describe some of the difficulties presented by using C++ for doing parallel and scientific computation.

Forslund, D.W.; Wingate, C.A.; Ford, P.S.; Junkins, J.S.; Pope, S.C.

1992-03-01T23:59:59.000Z

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


381

Disens: scalable distributed sensor network simulation  

Science Conference Proceedings (OSTI)

Simulation is widely used for developing, evaluating and analyzing sensor network applications, especially when deploying a large scale sensor network remains expensive and labor intensive. However, due to its computation intensive nature, existent simulation ... Keywords: distributed simulation, sensor network, simulation

Ye Wen; Rich Wolski; Gregory Moore

2007-03-01T23:59:59.000Z

382

Applied and Computational Mathematics Division  

Science Conference Proceedings (OSTI)

Applied and Computational Mathematics Division. Topic Areas. Mathematics; Scientific Computing; Visualization; Quantum Computing. ...

2013-05-09T23:59:59.000Z

383

Keeneland: Computational Science Using Heterogeneous GPU Computing  

E-Print Network (OSTI)

................................................................. 152 123 #12;124 Contemporary High Performance Computing: From Petascale toward Exascale 7.1 Overview of Computational Sciences, and Oak Ridge National Laboratory. NSF 08-573: High Performance Computing System performance computing system. The Keeneland project is led by the Georgia Institute of Technology (Georgia

Dongarra, Jack

384

Typologies of Computation and Computational Models  

E-Print Network (OSTI)

We need much better understanding of information processing and computation as its primary form. Future progress of new computational devices capable of dealing with problems of big data, internet of things, semantic web, cognitive robotics and neuroinformatics depends on the adequate models of computation. In this article we first present the current state of the art through systematization of existing models and mechanisms, and outline basic structural framework of computation. We argue that defining computation as information processing, and given that there is no information without (physical) representation, the dynamics of information on the fundamental level is physical/ intrinsic/ natural computation. As a special case, intrinsic computation is used for designed computation in computing machinery. Intrinsic natural computation occurs on variety of levels of physical processes, containing the levels of computation of living organisms (including highly intelligent animals) as well as designed computational devices. The present article offers a typology of current models of computation and indicates future paths for the advancement of the field; both by the development of new computational models and by learning from nature how to better compute using different mechanisms of intrinsic computation.

Mark Burgin; Gordana Dodig-Crnkovic

2013-12-09T23:59:59.000Z

385

COMPUTATIONAL ECONOMICS AT THE COMPUTATION INSTITUTE  

E-Print Network (OSTI)

COMPUTATIONAL ECONOMICS AT THE COMPUTATION INSTITUTE Summary of 3-D Discussions Prepared by Ken Judd Autumn Quarter, 2006 In the Autumn quarter, 2006, Computation Institute Director Ian Foster of some topic. The first set of 3-D talks brought together a variety of computational scientists

386

Computer Algebra Course - CECM  

E-Print Network (OSTI)

Michael Monagan: Computer Algebra. ... (1) Representing and simplifying mathematical formulae on a computer. (1) Data structures for multivariate polynomials.

387

Computer Algebra Course - CECM  

E-Print Network (OSTI)

Michael Monagan: Computer Algebra. ... Representing and simplifying mathematical formulae on a computer. Symbolic differentiation of a formula.

388

Computer Security Division Homepage  

Science Conference Proceedings (OSTI)

Computer Security Division. ... The 2012 Computer Security Division Annual Report (Special Publication 800-165) is now available. ...

2013-09-12T23:59:59.000Z

389

Sustainable Energy Systems Group  

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

Sustainable Energy Systems Group The Sustainable Energy Systems Group studies the impacts of energy generation and use, manufacturing, and other activities on the environment, the...

390

Scientific Interest Groups  

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

synchrotron research in a particular area. View monthly meetings on calendar Groups Catalysis Randall Winans, APS The Catalysis group meets at noon on the second Tuesday of each...

391

Computer Refurbishment  

SciTech Connect

The major activity for the 18-month refurbishment outage at the Point Lepreau Generating Station is the replacement of all 380 fuel channel and calandria tube assemblies and the lower portion of connecting feeder pipes. New Brunswick Power would also take advantage of this outage to conduct a number of repairs, replacements, inspections and upgrades (such as rewinding or replacing the generator, replacement of shutdown system trip computers, replacement of certain valves and expansion joints, inspection of systems not normally accessible, etc.). This would allow for an additional 25 to 30 years. Among the systems to be replaced are the PDC's for both shutdown systems. Assessments have been completed for both the SDS1 and SDS2 PDC's, and it has been decided to replace the SDS2 PDCs with the same hardware and software approach that has been used successfully for the Wolsong 2, 3, and 4 and the Qinshan 1 and 2 SDS2 PDCs. For SDS1, it has been decided to use the same software development methodology that was used successfully for the Wolsong and Qinshan called the I A and to use a new hardware platform in order to ensure successful operation for the 25-30 year station operating life. The selected supplier is Triconex, which uses a triple modular redundant architecture that will enhance the robustness/fault tolerance of the design with respect to equipment failures.

Ichiyen, Norman; Chan, Dominic; Thompson, Paul

2004-01-15T23:59:59.000Z

392

142 Computer Science 143 Computer science is concerned with the study of computers and computing,  

E-Print Network (OSTI)

142 Computer Science 143 Computer science is concerned with the study of computers and computing, focusing on algorithms, programs and programming, and computational systems. The main goal of computational systems and to show how this body of knowledge can be used to produce solutions to real

Richards-Kortum, Rebecca

393

CMS Computing: Performance and Outlook  

E-Print Network (OSTI)

After years of development, the CMS distributed computing system is now in full operation. The LHC continues to set records for instantaneous luminosity, and CMS continues to record data at 300 Hz. Because of the intensity of the beams, there are multiple proton-proton interactions per beam crossing, leading to larger and larger event sizes and processing times. The CMS computing system has responded admirably to these challenges. We present the current status of the system, describe the recent performance, and discuss the challenges ahead and how we intend to meet them.

Kenneth Bloom; for the CMS Collaboration

2011-10-02T23:59:59.000Z

394

AGILA: The Ateneo High Performance Computing System  

E-Print Network (OSTI)

A Beowulf cluster is a low-cost parallel high performance computing system that uses commodity hardware components such as personal computers and standard Ethernet adapters and switches and runs on freely available software such as Linux and LAM-MPI. In this paper the development of the AGILA HPCS, which stands for the Ateneo GigaflopsRange Performance, Linux OS, and Athlon Processors High Performance Computing System, is discussed including its hardware and software configurations and performance evaluation. Keywords High-performance computing, commodity cluster computing, parallel computing, Beowulf-class cluster 1. INTRODUCTION In the Philippines today, computing power in the range of gigaflops is not generally available for use in research and development. Conventional supercomputers or high performance computing systems are very expensive and are beyond the budgets of most university research groups especially in developing countries such as the Philippines. A lower cost option...

Rafael P. Saldaa; Felix P. Muga; II; Jerrold J. Garcia; William Emmanuel S. Yu; S. Yu

2000-01-01T23:59:59.000Z

395

Fusion rings for quantum groups  

E-Print Network (OSTI)

We study the fusion rings of tilting modules for a quantum group at a root of unity modulo the tensor ideal of negligible tilting modules. We identify them in type A with the combinatorial rings from [KS] and give a similar description of the sp(2n)-fusion ring in terms of noncommutative symmetric functions. Moreover we give a presentation of all fusion rings in classical types as quotients of polynomial rings extending known results in special cases. Finally we also compute the fusion rings for type G2.

Henning Haahr Andersen; Catharina Stroppel

2012-12-22T23:59:59.000Z

396

Groups defined by automata  

E-Print Network (OSTI)

This is Chapter 24 in the "AutoMathA" handbook. Finite automata have been used effectively in recent years to define infinite groups. The two main lines of research have as their most representative objects the class of automatic groups (including word-hyperbolic groups as a particular case) and automata groups (singled out among the more general self-similar groups). The first approach implements in the language of automata some tight constraints on the geometry of the group's Cayley graph, building strange, beautiful bridges between far-off domains. Automata are used to define a normal form for group elements, and to monitor the fundamental group operations. The second approach features groups acting in a finitely constrained manner on a regular rooted tree. Automata define sequential permutations of the tree, and represent the group elements themselves. The choice of particular classes of automata has often provided groups with exotic behaviour which have revolutioned our perception of infinite finitely ge...

Bartholdi, Laurent

2010-01-01T23:59:59.000Z

397

A timed mobile agent planning approach for distributed information retrieval in dynamic network environments  

Science Conference Proceedings (OSTI)

The number of mobile agents and total execution time are two factors used to represent the system overhead that must be considered as part of mobile agent planning (MAP) for distributed information retrieval. In addition to these two factors, the time ... Keywords: Distributed computing, Distributed information retrieval, Internet and mobile computing, Mobile agents, P2P computing

Jin-Wook Baek; Heon Y. Yeom

2006-11-01T23:59:59.000Z

398

Computing with almost periodic functions  

E-Print Network (OSTI)

The paper develops a method for discrete computational Fourier analysis of functions defined on quasicrystals and other almost periodic sets. A key point is to build the analysis around the emerging theory of quasicrystals and diffraction in the setting on local hulls and dynamical systems. Numerically computed approximations arising in this way are built out of the Fourier module of the quasicrystal in question, and approximate their target functions uniformly on the entire infinite space. The methods are entirely group theoretical, being based on finite groups and their duals, and they are practical and computable. Examples of functions based on the standard Fibonacci quasicrystal serve to illustrate the method (which is applicable to all quasicrystals modeled on the cut and project formalism).

R. V. Moody; M. Nesterenko; J. Patera

2008-08-13T23:59:59.000Z

399

Distributed processor allocation for launching applications in a massively connected processors complex  

DOE Patents (OSTI)

A compute processor allocator architecture for allocating compute processors to run applications in a multiple processor computing apparatus is distributed among a subset of processors within the computing apparatus. Each processor of the subset includes a compute processor allocator. The compute processor allocators can share a common database of information pertinent to compute processor allocation. A communication path permits retrieval of information from the database independently of the compute processor allocators.

Pedretti, Kevin (Goleta, CA)

2008-11-18T23:59:59.000Z

400

Fermilab | Employee Advisory Group | Focus Group Report  

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

Phone Book Fermilab at Work Search Search Go Skip over navigation to main content EAG Home About the EAG EAG Members Questions and Answers Suggestions and Questions Focus Group...

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


401

A Distributed Graph Storage System for Artifacts in Group Collaborations  

E-Print Network (OSTI)

Douglas E. Shackelford John B. Smith F. Donelson Smith The University of North Carolina at Chapel Hill

North Carolina at Chapel Hill, University of

402

The Distribution of Data Management Responsibility within Scientific Research Groups  

E-Print Network (OSTI)

cycling, lifetime, battery capacity, sleep power, activeDuty Cycle Lifetime Battery capacity Energy left untappedthe available battery power, capacity, and other variables

Wallis, Jillian C.

2012-01-01T23:59:59.000Z

403

A lock-free environment for computer music: concurrent components for computer supported cooperative work.  

E-Print Network (OSTI)

??This dissertation investigates the use of lock-free shared-memory techniques for distributed computer music composition and performance environments. A method is presented by which the underlying (more)

Shelton, Robert James

2011-01-01T23:59:59.000Z

404

Oak Ridge Leadership Computing Facility  

NLE Websites -- All DOE Office Websites

Oak Ridge Leadership Computing Facility Oak Ridge Leadership Computing Facility The OLCF was established at Oak Ridge National Laboratory in 2004 with the mission of standing up a supercomputer 100 times more powerful than the leading systems of the day. Connect with OLCF Facebook Twitter YouTube Vimeo Search OLCF.ORNL.GOV Home About OLCF Overview Leadership Team Groups Org Chart User Council Careers Visitor Information & Tours Contact Us Leadership Science Biological Sciences Chemistry Computer Science Earth Science Engineering Materials Science Physics 2013 INCITE Projects 2013 ALCC Projects Computing Resources Titan Cray XK7 Eos Lens EVEREST Rhea Sith Smoky Data Management Data Analysis Center Projects Adios CCI eSiMon File System Projects IOTA OpenSFS SWTools XGAR User Support Getting Started System User Guides KnowledgeBase

405

Empirical evaluation of distributed pair programming  

Science Conference Proceedings (OSTI)

Pair programming, in which two individuals share a single computer to collaboratively develop software, has been shown to have many benefits in industry and in education. One drawback of pair programming is its collocation requirement, which limits its ... Keywords: Computer-supported cooperative work, Distributed pair programming, Empirical software engineering, Gesturing, Introductory programming

Brian Hanks

2008-07-01T23:59:59.000Z

406

Bioanalytical Science Group  

Science Conference Proceedings (OSTI)

Bioanalytical Science Group. Welcome. We provide the measurement science, standards, technology, and data required ...

2013-02-08T23:59:59.000Z

407

Lighting Research Group  

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

Lighting Research Group overview what's new publications software facilities people contact us links...

408

Scientific Working Groups  

Science Conference Proceedings (OSTI)

... TWGDAM 1988). SWGDOG, Scientific Working Group on Dogs and Orthogonal Detection Guidelines, 2004. SWGTOX, Scientific ...

2013-07-10T23:59:59.000Z

409

QUANTUM GROUPS JOHAN KUSTERMANS  

E-Print Network (OSTI)

QUANTUM GROUPS JOHAN KUSTERMANS Syllabus: #15; The de#12;nition of a locally compact quantum group: motivational ex- amples and special cases. The classical case, compact and discrete quantum groups. #15 for weights. #15; The general de#12;nition of a locally compact quantum group and its basic consequences

Schürmann, Michael

410

Alexis Park Hotel, Las Vegas Topic Group Meeting Participants...  

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

distributed a meeting agenda, welcomed participants and introduced himself as the new Rail Topic Group lead and facilitator. He introduced Item I, "Existing Business";...

411

Identifying discriminating variables between teachers who fully integrate computers and teachers with limited integration  

Science Conference Proceedings (OSTI)

Given the prevalence of computers in education today, it is critical to understand teachers' perspectives regarding computer integration in their classrooms. The current study surveyed a random sample of a heterogeneous group of 185 elementary and 204 ... Keywords: Computer integration, Computer technology, Computers, Computers in classrooms, Elementary and secondary teachers, Teacher Characteristics, Teachers

Julie Mueller; Eileen Wood; Teena Willoughby; Craig Ross; Jacqueline Specht

2008-12-01T23:59:59.000Z

412

Income distribution impacts of climate change mitigation policy in the Susquehanna River Basin Economy  

SciTech Connect

We examine the cost-side income distribution impacts of a carbon tax in the Susquehanna River Basin (SRB) Region of the United States utilizing a computable general equilibrium model. We find the aggregate impacts of a $25/ton carbon tax on the SRB economy are likely to be negative but modest-an approximately one-third of 1% reduction in Gross Regional Product (GRP) in the short-run and double that amount in the long-run. However, unlike many previous studies, we find that the carbon tax is mildly progressive as measured by income bracket changes, per capita equivalent variation, and Gini coefficient changes based on expenditure patterns. The dominant factors affecting the distributional impacts are the pattern of output, income and consumption impacts that affect lower income groups relatively less than higher income ones, an increase in transfer payments favoring lower income groups, and decreased corporate profits absorbed primarily by higher income groups.

Oladosu, Gbadebo A [ORNL

2007-01-01T23:59:59.000Z

413

Coordination for uncertain outcomes using distributed neighbor exchange  

Science Conference Proceedings (OSTI)

Coordination of agent activites in non-deterministic, distributed environments is computationally difficult. Distributed Constraint Optimization (DCOP) provides a rich framework for modeling such multi-agent coordination problems, but existing representations, ... Keywords: distributed constraint optimization, distributed problem solving, multi-agent coordination, task scheduling

James Atlas; Keith Decker

2010-05-01T23:59:59.000Z

414

DISTRIBUTION CATEGORY  

Office of Scientific and Technical Information (OSTI)

DISTRIBUTION CATEGORY DISTRIBUTION CATEGORY uc-11 I A W E N C E LIVERMORE IABORATORY University of Cahfmia/Livermore, California/94550 UCRL-52658 CALCULATION OF CHEMICAL EQUILIBRIUM BETWEEN AQUEOUS SOLUTION AND MINERALS: THE EQ3/6 - - SOFTWARE PACKAGE T. J. Wolery MS. date: February 1, 1979 . . - . . - . Tho rcpon rn prepared as an account of work sponsored by the United Stater Government. Seither Lhc Urutcd Stater nor the Umted Stater Department of Energy, nor any of their employees. nor any of their E O ~ ~ ~ B C I O I S . rubcontracton. o r their employees. makes any warranr)., exprcs or !mplwd. or assumes any legal liability or respanability io: the ~ c c u o c y . complctencn or uvfulneu of any miormarlon. apparatcr. product or p r o m s dtwlorcd. or r c p r e v n u that its UP would not infringe privately owned r

415

Energy Research Group Staff Page  

Science Conference Proceedings (OSTI)

Energy Research Group Staff. ... Nikolai Zhitenev, Group Leader Nikolai Zhitenev is the Group Leader of the CNST Energy Research Group. ...

2013-11-08T23:59:59.000Z

416

TGDC Applications Working Group  

Science Conference Proceedings (OSTI)

... The draft document we have out now (IEEE P1622 Use Case for Electronic Blank Ballot Distribution) is in the IEEE's boiler plate formatsome of ...

2011-05-12T23:59:59.000Z

417

N-TSVS: a Videoconference Tool for Generic Cooperative Groups  

Science Conference Proceedings (OSTI)

This paper presents the architecture and the design of a distributed videoconferencing application called N-TSVS. The structure of the cooperative groups supported by N-TSVS is defined and modelled by graphs: their vertices describe the group members ...

T. Villemur; P. Owezarski; M. Diaz

1998-10-01T23:59:59.000Z

418

Rational subsets of groups  

E-Print Network (OSTI)

This text, Chapter 23 in the "AutoMathA" handbook, is devoted to the study of rational subsets of groups, with particular emphasis on the automata-theoretic approach to finitely generated subgroups of free groups. Indeed, Stallings' construction, associating a finite inverse automaton with every such subgroup, inaugurated a complete rewriting of free group algorithmics, with connections to other fields such as topology or dynamics. Another important vector in the chapter is the fundamental Benois' Theorem, characterizing rational subsets of free groups. The theorem and its consequences really explain why language theory can be successfully applied to the study of free groups. Rational subsets of (free) groups can play a major role in proving statements (a priori unrelated to the notion of rationality) by induction. The chapter also includes related results for more general classes of groups, such as virtually free groups or graph groups.

Bartholdi, Laurent

2010-01-01T23:59:59.000Z

419

Stratgie de distribution d'un groupe petrolier intgr : Cas du groupe sonatrach et sa filiale de distribution naftal.  

E-Print Network (OSTI)

??425 p. ; ill. ; 30 cm Avec l'ouverture du march national des produits ptroliers aux oprateurs privs nationaux et trangers, Naftal, socit Nationale de (more)

Houghlaouene, Samir

2007-01-01T23:59:59.000Z

420

Massively distributed systems: design issues and challenges  

Science Conference Proceedings (OSTI)

The forty year trend in the computing industry is away from centralized, high unit cost, low unit volume products toward distributed, low unit cost, high unit volume products. The next step in this process is the emergence of massively distributed systems. ...

Dan Nessett

1999-03-01T23:59:59.000Z

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


421

Data-centric middleware for context-aware pervasive computing  

Science Conference Proceedings (OSTI)

The complexity of developing and deploying context-aware pervasive-computing applications calls for distributed software infrastructures that assist applications to collect, aggregate, and disseminate contextual data. In this paper, we motivate a data-centric ... Keywords: Context-aware computing, Data-centric middleware, Emergency response, Pervasive computing, Smart environments

Guanling Chen; Ming Li; David Kotz

2008-04-01T23:59:59.000Z

422

Software Reuse in High Performance Computing Shirley Browne  

E-Print Network (OSTI)

Software Reuse in High Performance Computing Shirley Browne University of Tennessee 107 Ayres Hall high performance computing architectures in the form of distributed memorymul- tiprocessors have become of programming applications to run on these machines. Economical use of high performance computing and subsequent

Dongarra, Jack

423

Advanced Environments and Tools for High Performance Computing  

E-Print Network (OSTI)

Advanced Environments and Tools for High Performance Computing Problem-Solving Environments Environments and Tools for High Performance Computing. The conference was chaired by Professor D. W. Walker and managing distributed high performance comput- ing resources is important for a PSE to meet the requirements

Walker, David W.

424

A Study of Software Development for High Performance Computing  

E-Print Network (OSTI)

A Study of Software Development for High Performance Computing Manish Parashar, Salim Hariri Parallel Distributed Systems, 1994 Abstract Software development in a High Performance Computing (HPC. The objective of this paper is to study the software development process in a high performance computing

Parashar, Manish

425

Software Reuse in High Performance Computing Shirley Browne  

E-Print Network (OSTI)

Software Reuse in High Performance Computing Shirley Browne University of Tennessee 107 Ayres Hall high performance computing architectures in the form of distributed memory mul­ tiprocessors have and cost of programming applications to run on these machines. Economical use of high performance computing

Dongarra, Jack

426

Grid Computing for Fire Evolution Simulation Diploma Thesis  

E-Print Network (OSTI)

s provide computational, data, application and information services s analogous to electricity grids #12 Simulator Experiments and Results - p. 5/41 What is the Grid? ­ Definitions s a distributed computing- p. 1/41 Grid Computing for Fire Evolution Simulation Diploma Thesis Thomas Diamantis University

Toronto, University of

427

Cactus Grid Computing: Review of Current Development  

Science Conference Proceedings (OSTI)

Cactus is an open source problem solving environment designed for scientists and engineers. Its modular structure facilitates parallel computation across different architectures and collaborative code development between different groups. Here we detail ...

Gabrielle Allen; Werner Benger; Thomas Dramlitsch; Tom Goodale; Hans-Christian Hege; Gerd Lanfermann; Andr Merzky; Thomas Radke; Edward Seidel

2001-08-01T23:59:59.000Z

428

Richard Coffey | Argonne Leadership Computing Facility  

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

a supercomputer for those groups, and participated in campus-wide IT and high-performance computing leadership efforts. Before that, he worked for ten years at the University...

429

Introduction to High Performance Computing Using GPUs  

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

HPC Using GPUs Introduction to High Performance Computing Using GPUs July 11, 2013 NERSC, NVIDIA, and The Portland Group will present a one-day workshop "Introduction to High...

430

Beyond moore computing research challenge workshop report.  

SciTech Connect

We summarize the presentations and break out session discussions from the in-house workshop that was held on 11 July 2013 to acquaint a wider group of Sandians with the Beyond Moore Computing research challenge.

Huey, Mark C. [Perspectives, Inc., Albuquerque, NM] [Perspectives, Inc., Albuquerque, NM; Aidun, John Bahram

2013-10-01T23:59:59.000Z

431

Ethics and computer security: cause and effect  

Science Conference Proceedings (OSTI)

Newspapers around the world carried this report of the West German hackers infiltration of the NASA computer network. The hackers were members of a computer club in Hamburg, Germany who called themselves CHAOS. The group founded in 1985 were mostly hobbyists, ...

Marlene Campbell

1988-02-01T23:59:59.000Z

432

GEORG-AUGUST-UNIVERSITT Computer Security  

E-Print Network (OSTI)

GEORG-AUGUST-UNIVERSIT?T G?TTINGEN Computer Security Overview and Introduction Computer Security Security @ Göttingen » Research group for comuter security » Prof. Dr. Konrad Rieck » 4 PhD students (+ 2 security » Research on analysis, detection and prevention of threats » Development of intelligent security

Grabowski, Jens

433

Chronology of Computing Devices  

Science Conference Proceedings (OSTI)

A chronology of computing devices is given. It begins with the abacus and counting tables, and traces the development through desk calculators, analog computers, and finally stored program automatic digital computers. Significant dates relative to the ... Keywords: Calculating machines, chronology, computers, computing devices, history.

H. D. Huskey; V. R. Huskey

1976-12-01T23:59:59.000Z

434

Corporate Information & Computing Services  

E-Print Network (OSTI)

Corporate Information & Computing Services High Performance Computing Report March 2008 Author The University of Sheffield's High Performance Computing (HPC) facility is provided by CiCS. It consists of both Graduate Students and Staff. #12;Corporate Information & Computing Services High Performance Computing

Martin, Stephen John

435

High Performance Computing in  

E-Print Network (OSTI)

High Performance Computing in Bioinformatics Thomas Ludwig (t.ludwig@computer.org) Ruprecht PART I: High Performance Computing Thomas Ludwig PART II: HPC Computing in Bioinformatics Alexandros #12;© Thomas Ludwig, Alexandros Stamatakis, GCB'04 3 PART I High Performance Computing Introduction

Stamatakis, Alexandros

436

Student Manual Computers Gorlaeus  

E-Print Network (OSTI)

1 Student Manual Computers Gorlaeus September 2007 Universiteit Leiden Computerdienst Gorlaeus Helpdesk@science.leidenuniv.nl tel. (071-527) 4702 #12;Student Manual Computers Gorlaeus sep-07 Computer. .............................................................................................. 6 #12;Student Manual Computers Gorlaeus sep-07 Computer Helpdesk helpdesk@chem.leidenuniv.nl 2 1

Galis, Frietson

437

NIST, Computer Security Division, Computer Security ...  

Science Conference Proceedings (OSTI)

... Standards. ITL January 1999, Jan 1999, Secure Web-Based Access to High Performance Computing Resources. ITL November ...

438

Distributed Generation  

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

Untapped Value of Backup Generation Untapped Value of Backup Generation While new guidelines and regulations such as IEEE (Institute of Electrical and Electronics Engineers) 1547 have come a long way in addressing interconnection standards for distributed generation, utilities have largely overlooked the untapped potential of these resources. Under certain conditions, these units (primarily backup generators) represent a significant source of power that can deliver utility services at lower costs than traditional centralized solutions. These backup generators exist today in large numbers and provide utilities with another option to reduce peak load, relieve transmission congestion, and improve power reliability. Backup generation is widely deployed across the United States. Carnegie Mellon's Electricity

439

Percent Distribution  

Gasoline and Diesel Fuel Update (EIA)

. . Percent Distribution of Natural Gas Supply and Disposition by State, 1996 Table State Estimated Proved Reserves (dry) Marketed Production Total Consumption Alabama................................................................... 3.02 2.69 1.48 Alaska ...................................................................... 5.58 2.43 2.04 Arizona..................................................................... NA 0 0.55 Arkansas.................................................................. 0.88 1.12 1.23 California.................................................................. 1.25 1.45 8.23 Colorado .................................................................. 4.63 2.90 1.40 Connecticut.............................................................. 0 0 0.58 D.C...........................................................................

440

Student Common Interest Group  

Science Conference Proceedings (OSTI)

Students interested in the oils and fats industry make valuable networking connections by joining the AOCS Student Common Interest Group. Student Common Interest Group Student Membership achievement aocs application award awards distinguished divi

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


441

Quantum Chevalley groups  

E-Print Network (OSTI)

The goal of this paper is to construct quantum analogues of Chevalley groups inside completions of quantum groups or, more precisely, inside completions of Hall algebras of finitary categories.

Berenstein, Arkady

2012-01-01T23:59:59.000Z

442

Computational Methods for Simulating Quantum Computers  

E-Print Network (OSTI)

This review gives a survey of numerical algorithms and software to simulate quantum computers.It covers the basic concepts of quantum computation and quantum algorithms and includes a few examples that illustrate the use of simulation software for ideal and physical models of quantum computers.

H. De Raedt; K. Michielsen

2004-06-27T23:59:59.000Z

443

Microanalysis Research Group Staff  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Microanalysis Research Group Staff. ... Joseph M. Conny, Research Chemist. Jeff M. Davis, Materials Research Engineer. ...

2013-05-15T23:59:59.000Z

444

Hydrogen Analysis Group  

DOE Green Energy (OSTI)

NREL factsheet that describes the general activites of the Hydrogen Analysis Group within NREL's Hydrogen Technologies and Systems Center.

Not Available

2008-03-01T23:59:59.000Z

445

Retrieval Group Digital Video  

Science Conference Proceedings (OSTI)

This site is no longer in use and will soon disappear entirely. The Retrieval Group Information Access Division Last updated ...

446

Lecture 7: Worldwide LHC Computing Grid Overview  

E-Print Network (OSTI)

This presentation will introduce in an informal, but technically correct way the challenges that are linked to the needs of massively distributed computing architectures in the context of the LHC offline computing. The topics include technological and organizational aspects touching many aspects of LHC computing, from data access, to maintenance of large databases and huge collections of files, to the organization of computing farms and monitoring. Fabrizio Furano holds a Ph.D in Computer Science and has worked in the field of Computing for High Energy Physics for many years. Some of his preferred topics include application architectures, system design and project management, with focus on performance and scalability of data access. Fabrizio has experience in a wide variety of environments, from private companies to academic research in particular in object oriented methodologies, mainly using C++. He has also teaching experience at university level in Software Engineering and C++ Programming.

CERN. Geneva

2013-01-01T23:59:59.000Z

447

Working Group 7 Summary  

SciTech Connect

The primary subject of working group 7 at the 2012 Advanced Accelerator Concepts Workshop was muon accelerators for a muon collider or neutrino factory. Additionally, this working group included topics that did not fit well into other working groups. Two subjects were discussed by more than one speaker: lattices to create a perfectly integrable nonlinear lattice, and a Penning trap to create antihydrogen.

Nagaitsev S.; Berg J.

2012-06-10T23:59:59.000Z

448

Quantum Monte Carlo Endstation for Petascale Computing  

SciTech Connect

NCSU research group has been focused on accomplising the key goals of this initiative: establishing new generation of quantum Monte Carlo (QMC) computational tools as a part of Endstation petaflop initiative for use at the DOE ORNL computational facilities and for use by computational electronic structure community at large; carrying out high accuracy quantum Monte Carlo demonstration projects in application of these tools to the forefront electronic structure problems in molecular and solid systems; expanding the impact of QMC methods and approaches; explaining and enhancing the impact of these advanced computational approaches. In particular, we have developed quantum Monte Carlo code (QWalk, www.qwalk.org) which was significantly expanded and optimized using funds from this support and at present became an actively used tool in the petascale regime by ORNL researchers and beyond. These developments have been built upon efforts undertaken by the PI's group and collaborators over the period of the last decade. The code was optimized and tested extensively on a number of parallel architectures including petaflop ORNL Jaguar machine. We have developed and redesigned a number of code modules such as evaluation of wave functions and orbitals, calculations of pfaffians and introduction of backflow coordinates together with overall organization of the code and random walker distribution over multicore architectures. We have addressed several bottlenecks such as load balancing and verified efficiency and accuracy of the calculations with the other groups of the Endstation team. The QWalk package contains about 50,000 lines of high quality object-oriented C++ and includes also interfaces to data files from other conventional electronic structure codes such as Gamess, Gaussian, Crystal and others. This grant supported PI for one month during summers, a full-time postdoc and partially three graduate students over the period of the grant duration, it has resulted in 13 published papers, 15 invited talks and lectures nationally and internationally. My former graduate student and postdoc Dr. Michal Bajdich, who was supported byt this grant, is currently a postdoc with ORNL in the group of Dr. F. Reboredo and Dr. P. Kent and is using the developed tools in a number of DOE projects. The QWalk package has become a truly important research tool used by the electronic structure community and has attracted several new developers in other research groups. Our tools use several types of correlated wavefunction approaches, variational, diffusion and reptation methods, large-scale optimization methods for wavefunctions and enables to calculate energy differences such as cohesion, electronic gaps, but also densities and other properties, using multiple runs one can obtain equations of state for given structures and beyond. Our codes use efficient numerical and Monte Carlo strategies (high accuracy numerical orbitals, multi-reference wave functions, highly accurate correlation factors, pairing orbitals, force biased and correlated sampling Monte Carlo), are robustly parallelized and enable to run on tens of thousands cores very efficiently. Our demonstration applications were focused on the challenging research problems in several fields of materials science such as transition metal solids. We note that our study of FeO solid was the first QMC calculation of transition metal oxides at high pressures.

Lubos Mitas

2011-01-26T23:59:59.000Z

449

Underground Distribution  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has undertaken a multiyear research effort to identify and describe best practices in managing urban network systems in the key functional areas of planning, design, construction, operations and maintenance, and safety. This report summarizes the results of a network practices survey developed and issued collaboratively by EPRI and the Network Subcommittee of the Association of Edison Illuminating Companies (AEIC) Power Delivery Group.

2009-09-18T23:59:59.000Z

450

Defining computational aesthetics  

Science Conference Proceedings (OSTI)

This paper attempts to define the discipline of Computational Aesthetics in the context of computer science, partly reflecting the contributions and comprehensive discussions of the first EG Workshop on Computational Aesthetics in Graphics, Visualization ...

Florian Hoenig

2005-05-01T23:59:59.000Z

451

ComputerCluster ? FCW  

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

CNMS Computer Cluster This page describes the CNMS Computational Cluster, how to access it, and how to use it. (16 August 2010) N.B. The latest block of the CNMS Computer Cluster...

452

Computer Forensics In Forensis  

E-Print Network (OSTI)

23 2007. [62] K. J. Ziese. Computer based forensics a caseU.N. In Proceedings of CMAD IV: Computer Misuse and Anomalyinvestigations. Journal of Computer Security, 12(5):753776,

Peisert, Sean; Bishop, Matt; Marzullo, Keith

2008-01-01T23:59:59.000Z

453

Compute Node MD3000 Storage Array  

E-Print Network (OSTI)

Compute Node MD3000 Storage Array Dell 2950 Head Node 24-Port Switch Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node Compute Node 24-Port Switch Dell 2950

Weber, David J.

454

Homepage: High-Performance Computing Systems, HPC-3: High-Performance...  

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

1188 667-5243 Fax: 667-7665 MS T080 Computing Solutions that work for you High-Performance Computing Systems The High-Performance Computing Systems Group provides production...

455

A GAP package for computation with coherent configurations  

Science Conference Proceedings (OSTI)

We present a GAP package for computing with Schurian coherent configurations and their representations. Keywords: GAP, GRAPE, association scheme, centralizer ring, coherent configuration, permutation group, sage, semidefinite programming

Dmitrii V. Pasechnik; Keshav Kini

2010-09-01T23:59:59.000Z

456

Exascale Computing at NERSC  

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

Science Gateway Development Storage and IO Technologies Testbeds Home R & D Exascale Computing Exascale Computing CoDEx Project: A HardwareSoftware Codesign Environment...

457

BNL | CFN: Theory & Computation  

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

Theory and Computation Contact: Mark Hybertsen Advances in theory, numerical algorithms and computational capabilities have enabled an unprecedented opportunity for fundamental...

458

Computer Algebra Course - CECM  

E-Print Network (OSTI)

Michael Monagan: Computer Algebra. ... Intro to Computer Algebra, Spring 2013. MACM 401/701 and CMPT 881/MATH 819, Spring 2013. Office hours:...

459

NEWTON's Computer Science Archive  

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

Computer Science Archive: Loading Most Recent Computer Science Questions: Preparation for Video Game Creator Most Common Programming and Web Script How Does Spell Check Work? How...

460

Computer hardware fault administration  

DOE Patents (OSTI)

Computer hardware fault administration carried out in a parallel computer, where the parallel computer includes a plurality of compute nodes. The compute nodes are coupled for data communications by at least two independent data communications networks, where each data communications network includes data communications links connected to the compute nodes. Typical embodiments carry out hardware fault administration by identifying a location of a defective link in the first data communications network of the parallel computer and routing communications data around the defective link through the second data communications network of the parallel computer.

Archer, Charles J. (Rochester, MN); Megerian, Mark G. (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian E. (Rochester, MN)

2010-09-14T23:59:59.000Z

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


461

BNL | Computational Science Center  

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

Computational Science Center Home Research Support Areas Publications Staff EBC Environmental, Biological, and Computational Sciences Directorate CSC image CSC image CSC image CSC...

462

Computational Biology | Biosciences Division  

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

Computational Biology BIO Home Page About BIO News Releases Research Publications People Contact Us Organization Chart Site Index Inside BIO BIO Safety About Argonne Computational...

463

Programming a paintable computer  

E-Print Network (OSTI)

A paintable computer is defined as an agglomerate of numerous, finely dispersed, ultra-miniaturized computing particles; each positioned randomly, running asynchronously and communicating locally. Individual particles are ...

Butera, William J. (William Joseph)

2002-01-01T23:59:59.000Z

464

Percent Distribution  

Gasoline and Diesel Fuel Update (EIA)

. . Percent Distribution of Natural Gas Delivered to Consumers by State, 1996 Table State Residential Commercial Industrial Vehicle Fuel Electric Utilities Alabama..................................... 1.08 0.92 2.27 0.08 0.23 Alaska ........................................ 0.31 0.87 0.85 - 1.16 Arizona....................................... 0.53 0.92 0.30 3.91 0.70 Arkansas.................................... 0.88 0.98 1.59 0.11 1.24 California.................................... 9.03 7.44 7.82 43.11 11.64 Colorado .................................... 2.12 2.18 0.94 0.58 0.20 Connecticut................................ 0.84 1.26 0.37 1.08 0.38 D.C............................................. 0.33 0.52 - 0.21 - Delaware.................................... 0.19 0.21 0.16 0.04 0.86 Florida........................................

465

Parton distributions.  

E-Print Network (OSTI)

-section for the virtual photon-proton interaction can be written in the factorized form ?(ep ? eX) = ? i CDISi (x, ?s(Q2))? fi(x,Q2) where Q2 is the photon virtuality, x = Q22m? , the mo- mentum fraction of parton (?=energy transfer in the lab frame), and the fi(x,Q2... distribution comes from inclusive jet measure- ments by D0 and CDF at Tevatron. They mea- 0 50 100 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 Dc 2 k Valence quarks Figure 6. ??2 against the isospin violating parameter ?. sure d?/dET d? for central rapidity CDF...

Thorne, Robert S

466

Computer-aided documentation  

Science Conference Proceedings (OSTI)

Current standards for high-quality documentation of complex computer systems include many criteria, based on the application and user levels. Important points common to many systems are: targeting to specific user groups; being complete, concise, and structured; containing both tutorials and reference material; being field-tested; and being timely in appearance relative to the software delivery. To achieve these goals, uniform quality standards should be more vigorously applied, the documentation development cycle should be shortened, more documentation/software help should be available on line, and more user interaction should be solicited. For future computer systems, the proposal is made that the documentation be machine comprehensible. This should be phased in, with the immediate goal being to facilitate user querying for information, and with an ultimate goal of providing a database for programmer apprentice artificial-intelligence programs that assist software development. This new functionality will be the result of several trends, including the drastically reduced cost of read-only online random-access storage via video optical disks, the ongoing successes of artificial-intelligence programs when applied to limited application areas, and the ever increasing cost of software programmers. 3 references.

Rosenberg, S.

1982-01-01T23:59:59.000Z

467

Can Cloud Computing Address the Scientific Computing Requirements...  

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

Can Cloud Computing Address the Scientific Computing Requirements for DOE Researchers? Well, Yes, No and Maybe Can Cloud Computing Address the Scientific Computing Requirements for...

468

Exascale Hardware Architectures Working Group  

Science Conference Proceedings (OSTI)

The ASC Exascale Hardware Architecture working group is challenged to provide input on the following areas impacting the future use and usability of potential exascale computer systems: processor, memory, and interconnect architectures, as well as the power and resilience of these systems. Going forward, there are many challenging issues that will need to be addressed. First, power constraints in processor technologies will lead to steady increases in parallelism within a socket. Additionally, all cores may not be fully independent nor fully general purpose. Second, there is a clear trend toward less balanced machines, in terms of compute capability compared to memory and interconnect performance. In order to mitigate the memory issues, memory technologies will introduce 3D stacking, eventually moving on-socket and likely on-die, providing greatly increased bandwidth but unfortunately also likely providing smaller memory capacity per core. Off-socket memory, possibly in the form of non-volatile memory, will create a complex memory hierarchy. Third, communication energy will dominate the energy required to compute, such that interconnect power and bandwidth will have a significant impact. All of the above changes are driven by the need for greatly increased energy efficiency, as current technology will prove unsuitable for exascale, due to unsustainable power requirements of such a system. These changes will have the most significant impact on programming models and algorithms, but they will be felt across all layers of the machine. There is clear need to engage all ASC working groups in planning for how to deal with technological changes of this magnitude. The primary function of the Hardware Architecture Working Group is to facilitate codesign with hardware vendors to ensure future exascale platforms are capable of efficiently supporting the ASC applications, which in turn need to meet the mission needs of the NNSA Stockpile Stewardship Program. This issue is relatively immediate, as there is only a small window of opportunity to influence hardware design for 2018 machines. Given the short timeline a firm co-design methodology with vendors is of prime importance.

Hemmert, S; Ang, J; Chiang, P; Carnes, B; Doerfler, D; Leininger, M; Dosanjh, S; Fields, P; Koch, K; Laros, J; Noe, J; Quinn, T; Torrellas, J; Vetter, J; Wampler, C; White, A

2011-03-15T23:59:59.000Z

469

Dependable high performance computing on a parallel sysplex cluster  

E-Print Network (OSTI)

Abstract In this paper we address the issue of dependable distributed high performance computing in the field of Symbolic Computation. We describe the extension of a middleware infrastructure designed for high performance computing with efficient checkpointing mechanisms. As target platform an IBM Parallel Sysplex Cluster is used. We consider the satisfiability checking problem for boolean formulae as an example application from the realm of Symbolic Computation. Time measurements for an implementation of this application on top of the described system environment are given.

Wolfgang Blochinger

2000-01-01T23:59:59.000Z

470

Trails Working Group  

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

Trails Working Group Trails Working Group Trails Working Group Our mission is to inventory, map, and prepare historical reports on the many trails used at LANL. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email The LANL Trails Working Group inventories, maps, and prepares historical reports on the many trails used at LANL. Some of these trails are ancient pueblo footpaths that continue to be used for recreational hiking today. Some serve as quiet and non-motorized alternatives between the Townsite and LANL or between technical areas. The Trails Working Group, established in December 2003, includes representatives from local citizen hiking groups, Los Alamos County, Forest Service, Park Service, Los Alamos National Laboratory and the NNSA Los

471

Computers could aid construction projects  

SciTech Connect

The procedures currently used by engineering companies in planning their work on a segmented basis are a very small step from the development of a computer model encompassing the total scope of a very large engineering construction effort. When the computer model concept has been accepted and implemented, the results are a harmonious relationship between divergent groups, replacing the frequent scrambling and reaction among engineering, procurement, and construction that often takes place in completing a capital project. It is a small step to be able to derive all the benefits of early planning based upon logically developed knowledge. Common scheduling techniques used to provide a scenario for a total coordinated effort could provide a computer model of an entire engineering-construction project. To date, it is this concept that has eluded the industry.

Leon, L.

1983-10-01T23:59:59.000Z

472

Interagency Advanced Power Group, Solar Working Group: Meeting minutes  

SciTech Connect

This report is the minutes of the Solar Working group. The meeting was prompted by the Steering Group`s desire to resolve issues the Solar Working Group.

Not Available

1993-10-14T23:59:59.000Z

473

A Framework for Visualizing Hierarchical Computations  

E-Print Network (OSTI)

Introduction Researchers doing scientific computations are attempting to accurately model physical phenomenon. When those physical phenomena take place at a variety of different scales it can be more efficient and accurate to model them at different levels of detail in an adaptive manner. Two groups here in the National Energy Research Scientific Computing center [NERSC] at the Lawrence Berkeley National Laboratory [LBNL] are doing just that. One group is headed by John Bell (the Center for Computational Sciences and Engineering, [CCSE]) and the other is headed by Phil Colella (the Applied Numerical Algorithms Group, [ANAG]). Both are doing computations using similar adaptive mesh refinement (AMR) techniques. Since the term "AMR" can mean a variety of things to researchers it should be clarified that we use it to refer exclusively to block structured AMR as defined in a paper by Berger and Colella [Berger]. Given that the researchers have already defined a hierarchical structure for

Terry J. Ligocki; Brian Van Straalen; John M. Shalf; Gunther H. Weber; Bernd Hamann

2003-01-01T23:59:59.000Z

474

1451 Group 0  

Science Conference Proceedings (OSTI)

... It defines a set of implementaition-independent application programming interface (API) as needed. Website: http://grouper.ieee.org/groups/1451/0/.

2013-06-27T23:59:59.000Z

475

LBNL Community Advisory Group  

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

to search page 7 - Privacy policy 8 - Terms of use 9 - Go to contactcomment page LBNL Community Advisory Group: HOME CALENDAR FEEDBACK HOME About the Community Advisory...

476

Image Group Homepage  

Science Conference Proceedings (OSTI)

... The Group works to support the needs for Homeland Security Presidential Directive (HSPD)-12 and the Personal Identity Verification (PIV) card for ...

2013-07-16T23:59:59.000Z

477

Grid Integration Group  

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

Grid Integration Group The Demand Response Research Center (DRRC) conducts research that advances the near-term adoption of demand response (DR) technologies, policies, programs,...

478

Combustion Technologies Group  

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

Combustion Technologies Group Combustion research generates the fundamental physical and chemical knowledge on the interaction between flame and turbulence. Experimental and...

479

Electron Physics Group Homepage  

Science Conference Proceedings (OSTI)

... Group conducts wide ranging, cross-disciplinary research ... phenomenon known as spin transfer torque, a ... energy and generates heat, creating two ...

2012-07-20T23:59:59.000Z

480

Hydrogen Technologies Group  

DOE Green Energy (OSTI)

The Hydrogen Technologies Group at the National Renewable Energy Laboratory advances the Hydrogen Technologies and Systems Center's mission by researching a variety of hydrogen technologies.

Not Available

2008-03-01T23:59:59.000Z

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


481

NERSC Users Group  

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

Policies Data Analytics & Visualization Science Gateways User Surveys NERSC Users Group Teleconferences Annual Meetings NUGEX Elections Charter User Announcements Help Operations...

482

Scientific Interest Groups  

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

Catalysis High Pressure LiquidSoft-Matter Surface Scattering Powder Diffraction SAXS Surface & Interface Scattering XAS X-ray Micros.Imaging Scientific Interest Groups...

483

Tribal Topic Group Summary  

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

* Email information on Indian 101 course to Tribal Topic Group * Government panel at future TEC on impacts of broader hazmat transportation spectrum * Set up next conference...

484

MEMS Test Working Group  

Science Conference Proceedings (OSTI)

... p2. Top view of cantilevers in in-plane length group. p1. Unconventional anchor design. Same anchor design as in thickness test structures. ...

2013-05-03T23:59:59.000Z

485

Particle Data Group - Products  

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

Group HOME: pdgLive Summary Tables Reviews, Tables, Plots Particle Listings Europe, Africa, Middle East, India, Pakistan, Russia and all other countries For copies of: ...

486

Standards Working Groups - Logistics  

Science Conference Proceedings (OSTI)

... group is to define practices and test methods related to the overall deployment procedures and constraints in place for emergency response. ...

2011-01-03T23:59:59.000Z

487

TMS Group Savings Plus  

Science Conference Proceedings (OSTI)

A money-saving group discount on auto and homeowners policies; Convenient payment plans Including automatic checking account deduction or direct home...

488

Extreme Computing | Argonne National Laboratory  

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

Extreme Computing Extreme Computing Petascale computing and the emerging era of exascale computing pose numerous challenges, both from the underlying hardware architectures and the...

489

Fermilab | Science at Fermilab | Computing  

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

In this Section: High-performance Computing Grid Computing Networking Mass Storage Computing Computing is indispensable to science at Fermilab. High-energy physics experiments...

490

Data System Sciences & Engineering Group  

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

The Advanced Computing Solutions Team Advanced Computing Solutions (ACS) Team is engaged in multifaceted research. ACS is accomplished at bringing leading-edge, custom-developed...

491

Integration of sensing and computing in an intelligent decision support system for homeland security defense  

Science Conference Proceedings (OSTI)

We propose an intelligent decision support system based on sensor and computer networks that incorporates various component techniques for sensor deployment, data routing, distributed computing, and information fusion. The integrated system is deployed ... Keywords: Data routing, Distributed computing, Dynamic programming, Intelligent decision support system, Sensor deployment, Sensor fusion

Qishi Wu; Mengxia Zhu; Nageswara S. V. Rao

2009-04-01T23:59:59.000Z

492

Argonne Physics Division - Theory Group  

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

Special Day & Time: Special Day & Time: 10:30am Tues. 19 March 2013 Alessandro Lovato Argonne Leadership Computing Facility and Physics Division lovato@anl.gov Weak Response of Cold Symmetric Nuclear Matter at Three-Body Cluster Level 24 January 2013 Elmar Biernat Universidade Técnica de Lisboa, Portugal elmar.biernat@ist.utl.pt Meson properties from two different covariant approaches Special Day: Tues. 22 January 2013 Guillaume Hupin Lawrence Livermore National Lab hupin1@llnl.gov Continuum effects in nuclear structure and reactions Special Day & Time: 10:30am, Tues. 15 January 2013 Kyle Wendt Ohio State University wendt.31@osu.edu Non-Locality in the Similarity Renormalization Group Special Time: 10:30am 10 January 2013 Vojtech Krejcirik University of Maryland vkrejcir@umd.edu

493

Ergodic Quantum Computing  

Science Conference Proceedings (OSTI)

We propose a (theoretical) model for quantum computation where the result can be read out from the time average of the Hamiltonian dynamics of a 2-dimensional crystal on a cylinder.The Hamiltonian is a spatially local interaction among Wigner--Seitz ... Keywords: Hamiltonian of a quantum computer, Quantum cellular automata, solid state quantum computing, thermodynamics of computation

Dominik Janzing; Pawel Wocjan

2005-06-01T23:59:59.000Z

494

4SIGHT Computer Program  

Science Conference Proceedings (OSTI)

... The 4SIGHT computer program was written to facilitate concrete performance prediction under various exposure conditions. ...

2013-06-11T23:59:59.000Z

495

K--12 computational learning  

Science Conference Proceedings (OSTI)

Enhancing student learning and understanding by combining theories of learning with the computer's unique attributes.

Stephen Cooper; Lance C. Prez; Daphne Rainey

2010-11-01T23:59:59.000Z

496

Computing and Information  

E-Print Network (OSTI)

8 Faculty of Computing and Information Science Faculty of Computing and Information Science The concepts, modes of thought, and technology of computing and information science have fundamentally extended- versities respond? Cornell hit upon a unique strate- gy: create a college-level Faculty of Computing

Keinan, Alon

497

Cloud Computing Operations Research  

Science Conference Proceedings (OSTI)

This paper argues that the cloud computing industry faces many decision problems where operations research OR could add tremendous value. To this end, we provide an OR perspective on cloud computing in three ways. First, we compare the cloud computing ... Keywords: cloud IT, cloud computing, green IT, operations research, supply chain

Ilyas Iyoob, Emrah Zarifoglu, A. B. Dieker

2013-06-01T23:59:59.000Z

498

Autonomy-Oriented Computing (AOC): The nature and implications of a paradigm for self-organized computing  

E-Print Network (OSTI)

Facing the increasing needs for large-scale, robust, adaptive, and distributed/decentralized computing capabilities [1, 5] from such fields as Web intelligence, scientific and social computing, Internet commerce, and pervasive computing, an unconventional bottom-up paradigm, based on the notions of Autonomy-Oriented Computing (AOC) and self-organization in open complex systems, offers new opportunities for developing promising architectures, methods, and technologies. The goal of this paper is to describe the key concepts in this computing paradigm, and furthermore, discuss some of the fundamental principles and mechanisms for obtaining self-organized computing solutions. 1.

Jiming Liu

2008-01-01T23:59:59.000Z

499

Supercomputing & Computation | ORNL  

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

Projects Projects Educational Outreach News & Awards Events and Conferences Supporting Organizations Follow ORNL at SC13 Titan Propels GE Wind Turbine Research into New Territory Full Story Home | Science & Discovery | Supercomputing and Computation Supercomputing and Computational Science | Supercomputing and Computational Science SHARE ORNL's computational expertise is built on a foundation of computer science, mathematics, and "big data"-or data science. The projects we undertake run the gamut from basic to applied research, and our ability to efficiently apply the massive computing power available at ORNL across a range of scientific disciplines sets us apart from other computing centers. We have decades of experience in developing applications to support basic

500

COMPUTATION WITHOUT REPRESENTATION  

E-Print Network (OSTI)

The received view is that computational states are individuated at least in part by their semantic properties. I offer an alternative, according to which computational states are individuated by their functional properties. Functional properties are specified by a mechanistic explanation without appealing to any semantic properties. The primary purpose of this paper is to formulate the alternative view of computational individuation, point out that it supports a robust notion of computational explanation, and defend it on the grounds of how computational states are individuated within computability theory and computer science. A secondary purpose is to show that existing arguments for the semantic view are defective.

Gualtiero Piccinini

2006-01-01T23:59:59.000Z