Science.gov

Sample records for acceptable computation time

  1. Computer acceptance of older adults.

    PubMed

    Nägle, Sibylle; Schmidt, Ludger

    2012-01-01

    Even though computers play a massive role in everyday life of modern societies, older adults, and especially older women, are less likely to use a computer, and they perform fewer activities on it than younger adults. To get a better understanding of the factors affecting older adults' intention towards and usage of computers, the Unified Theory of Acceptance and Usage of Technology (UTAUT) was applied as part of a more extensive study with 52 users and non-users of computers, ranging in age from 50 to 90 years. The model covers various aspects of computer usage in old age via four key constructs, namely performance expectancy, effort expectancy, social influences, and facilitating conditions, as well as the variables gender, age, experience, and voluntariness it. Interestingly, next to performance expectancy, facilitating conditions showed the strongest correlation with use as well as with intention. Effort expectancy showed no significant correlation with the intention of older adults to use a computer. PMID:22317258

  2. The Acceptance and Use of Computer Based Assessment

    ERIC Educational Resources Information Center

    Terzis, Vasileios; Economides, Anastasios A.

    2011-01-01

    The effective development of a computer based assessment (CBA) depends on students' acceptance. The purpose of this study is to build a model that demonstrates the constructs that affect students' behavioral intention to use a CBA. The proposed model, Computer Based Assessment Acceptance Model (CBAAM) is based on previous models of technology…

  3. Prior Computer Experience and Technology Acceptance

    ERIC Educational Resources Information Center

    Varma, Sonali

    2010-01-01

    Prior computer experience with information technology has been identified as a key variable (Lee, Kozar, & Larsen, 2003) that can influence an individual's future use of newer computer technology. The lack of a theory driven approach to measuring prior experience has however led to conceptually different factors being used interchangeably in…

  4. Nurse educators' acceptance of the computer in baccalaureate nursing programs.

    PubMed

    Delaney, C W

    1989-01-01

    Although several studies have investigated nurse educators' perceived knowledge of and acceptance of computer technology, none have incorporated objective indicators of knowledge or acceptance. This descriptive research study used standardized and investigator-developed tests to examine acceptance of the computer by randomly selected administrators and faculty in private baccalaureate nursing programs. Levels of computer literacy and attitudes were sufficiently positive to promote the awareness, interest, and evaluation stages of Roger's diffusion and adoption model. Responses were not sufficiently positive to promote the trial and adoption of computer technology for instructional and administrative activities. Recommended approaches to meeting this challenge included instruction related to computer software and educational applications and the use of consortial arrangements to share knowledge, computer hardware and software, and application experiences. PMID:2659152

  5. Influence of Gender and Computer Teaching Efficacy on Computer Acceptance among Malaysian Student Teachers: An Extended Technology Acceptance Model

    ERIC Educational Resources Information Center

    Wong, Kung-Teck; Teo, Timothy; Russo, Sharon

    2012-01-01

    The purpose of this study is to validate the technology acceptance model (TAM) in an educational context and explore the role of gender and computer teaching efficacy as external variables. From the literature, it appeared that only limited studies had developed models to explain statistically the chain of influence of computer teaching efficacy…

  6. Understanding and enhancing user acceptance of computer technology

    NASA Technical Reports Server (NTRS)

    Rouse, William B.; Morris, Nancy M.

    1986-01-01

    Technology-driven efforts to implement computer technology often encounter problems due to lack of acceptance or begrudging acceptance of the personnel involved. It is argued that individuals' acceptance of automation, in terms of either computerization or computer aiding, is heavily influenced by their perceptions of the impact of the automation on their discretion in performing their jobs. It is suggested that desired levels of discretion reflect needs to feel in control and achieve self-satisfaction in task performance, as well as perceptions of inadequacies of computer technology. Discussion of these factors leads to a structured set of considerations for performing front-end analysis, deciding what to automate, and implementing the resulting changes.

  7. An acceptable role for computers in the aircraft design process

    NASA Technical Reports Server (NTRS)

    Gregory, T. J.; Roberts, L.

    1980-01-01

    Some of the reasons why the computerization trend is not wholly accepted are explored for two typical cases: computer use in the technical specialties and computer use in aircraft synthesis. The factors that limit acceptance are traced in part, to the large resources needed to understand the details of computer programs, the inability to include measured data as input to many of the theoretical programs, and the presentation of final results without supporting intermediate answers. Other factors are due solely to technical issues such as limited detail in aircraft synthesis and major simplifying assumptions in the technical specialties. These factors and others can be influenced by the technical specialist and aircraft designer. Some of these factors may become less significant as the computerization process evolves, but some issues, such as understanding large integrated systems, may remain issues in the future. Suggestions for improved acceptance include publishing computer programs so that they may be reviewed, edited, and read. Other mechanisms include extensive modularization of programs and ways to include measured information as part of the input to theoretical approaches.

  8. Study of the tevatron nonlinear acceptance by computer simulation

    SciTech Connect

    Willeke, F.

    1983-11-01

    In this report, the results of computer calculations of nonlinear acceptance reduction caused by nonlinear fields in the TEVATRON are presented. A set of test particles has been traced during many revolutions in the accelerator in order to determine the maximum stable amplitude in the presence of nonlinear fields. Sources of nonlinear fields are designed imperfections of dipole and quadrupole magnets, fluctuations due to manufacturing tolerances, and sextupole fields needed to compensate for chromaticity.

  9. CSI computer system/remote interface unit acceptance test results

    NASA Technical Reports Server (NTRS)

    Sparks, Dean W., Jr.

    1992-01-01

    The validation tests conducted on the Control/Structures Interaction (CSI) Computer System (CCS)/Remote Interface Unit (RIU) is discussed. The CCS/RIU consists of a commercially available, Langley Research Center (LaRC) programmed, space flight qualified computer and a flight data acquisition and filtering computer, developed at LaRC. The tests were performed in the Space Structures Research Laboratory (SSRL) and included open loop excitation, closed loop control, safing, RIU digital filtering, and RIU stand alone testing with the CSI Evolutionary Model (CEM) Phase-0 testbed. The test results indicated that the CCS/RIU system is comparable to ground based systems in performing real-time control-structure experiments.

  10. 4 CFR 28.4 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 4 Accounts 1 2014-01-01 2013-01-01 true Computation of time. 28.4 Section 28.4 Accounts GOVERNMENT... Definitions, and Jurisdiction § 28.4 Computation of time. (a) To compute the number of days for filing under... administrative judge. (d) No written submission shall be accepted by the Clerk of the Board after 4 p.m.,...

  11. Control strategy for a myoelectric hand: measuring acceptable time delay in human intention discrimination.

    PubMed

    Nakamura, Tatsuhiro; Kita, Kahori; Kato, Ryu; Matsushita, Kojiro; Hiroshi, Yokoi

    2009-01-01

    In order to enhance controllability of a myoelectric hand, we focus on a gap between the time when a human intends to move a myoelectric hand and the time when the hand actually moves (i.e., time delay). Normally, the myoelectric hand users dislike the time delay because it makes them feel uncomfortable. However, the users learn the time delay within some time ranges and, eventually, get feel comfortable to operate the hand. Thus, we assume, if we reveal the acceptable delay time (i.e., the time the users accept the gap with their learning ability), we can provide more time in a human intention discrimination process, and enhance its success rate. Therefore, we developed a mobile myoelectric hand system with an embedded linux computer, and conducted a ball catch experiment: we investigate the acceptable delay time by adding the delay time (i.e., 120[ms], 170[ms], 220[ms], 270[ms], 320[ms]) into the human intention discrimination process. As a result, we confirmed that the max accept delay time was approximately 170 [ms] that achieves 61% success rate. PMID:19964377

  12. 48 CFR 227.7203-14 - Conformity, acceptance, and warranty of computer software and computer software documentation.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., and warranty of computer software and computer software documentation. 227.7203-14 Section 227.7203-14... GENERAL CONTRACTING REQUIREMENTS PATENTS, DATA, AND COPYRIGHTS Rights in Computer Software and Computer Software Documentation 227.7203-14 Conformity, acceptance, and warranty of computer software and...

  13. 48 CFR 227.7203-14 - Conformity, acceptance, and warranty of computer software and computer software documentation.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., and warranty of computer software and computer software documentation. 227.7203-14 Section 227.7203-14... GENERAL CONTRACTING REQUIREMENTS PATENTS, DATA, AND COPYRIGHTS Rights in Computer Software and Computer Software Documentation 227.7203-14 Conformity, acceptance, and warranty of computer software and...

  14. 48 CFR 227.7203-14 - Conformity, acceptance, and warranty of computer software and computer software documentation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., and warranty of computer software and computer software documentation. 227.7203-14 Section 227.7203-14... GENERAL CONTRACTING REQUIREMENTS PATENTS, DATA, AND COPYRIGHTS Rights in Computer Software and Computer Software Documentation 227.7203-14 Conformity, acceptance, and warranty of computer software and...

  15. 48 CFR 227.7203-14 - Conformity, acceptance, and warranty of computer software and computer software documentation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., and warranty of computer software and computer software documentation. 227.7203-14 Section 227.7203-14... GENERAL CONTRACTING REQUIREMENTS PATENTS, DATA, AND COPYRIGHTS Rights in Computer Software and Computer Software Documentation 227.7203-14 Conformity, acceptance, and warranty of computer software and...

  16. 48 CFR 227.7203-14 - Conformity, acceptance, and warranty of computer software and computer software documentation.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., and warranty of computer software and computer software documentation. 227.7203-14 Section 227.7203-14... GENERAL CONTRACTING REQUIREMENTS PATENTS, DATA, AND COPYRIGHTS Rights in Computer Software and Computer Software Documentation 227.7203-14 Conformity, acceptance, and warranty of computer software and...

  17. The Impact of Iranian Teachers Cultural Values on Computer Technology Acceptance

    ERIC Educational Resources Information Center

    Sadeghi, Karim; Saribagloo, Javad Amani; Aghdam, Samad Hanifepour; Mahmoudi, Hojjat

    2014-01-01

    This study was conducted with the aim of testing the technology acceptance model and the impact of Hofstede cultural values (masculinity/femininity, uncertainty avoidance, individualism/collectivism, and power distance) on computer technology acceptance among teachers at Urmia city (Iran) using the structural equation modeling approach. From among…

  18. Modeling Computer Usage Intentions of Tertiary Students in a Developing Country through the Technology Acceptance Model

    ERIC Educational Resources Information Center

    Afari-Kumah, Eben; Achampong, Akwasi Kyere

    2010-01-01

    This study aims to examine the computer usage intentions of Ghanaian Tertiary Students. The Technology Acceptance Model was adopted as the theoretical framework to ascertain whether it could help explain behavioral intentions of individuals to accept and use technology. Factor analysis was used to assess the construct validity of the initial…

  19. A Computer's Arrow of Time

    NASA Astrophysics Data System (ADS)

    Schulman, L. S.

    2005-12-01

    Some researchers believe that the psychological or consciousness arrow of time is a consequence of the thermodynamic arrow. Some don't. As for many issues in this area, the disagreement revolves about fundamental and undebatable assumptions. As a contribution to this standoff I consider the extent to which a computer---presumably governed by nothing more than the thermodynamic arrow---can be said to possess a psychological arrow. My contention is that the parallels are sufficiently strong as to leave little room for an independent psychological arrow. Reservations are nevertheless expressed on the complete objectivity of the thermodynamic arrow.

  20. 12 CFR 1102.27 - Computing time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Computing time. 1102.27 Section 1102.27 Banks... for Proceedings § 1102.27 Computing time. (a) General rule. In computing any period of time prescribed... time begins to run is not included. The last day so computed is included, unless it is a...

  1. 12 CFR 1102.27 - Computing time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 7 2011-01-01 2011-01-01 false Computing time. 1102.27 Section 1102.27 Banks... for Proceedings § 1102.27 Computing time. (a) General rule. In computing any period of time prescribed... time begins to run is not included. The last day so computed is included, unless it is a...

  2. 12 CFR 1102.27 - Computing time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 9 2012-01-01 2012-01-01 false Computing time. 1102.27 Section 1102.27 Banks... for Proceedings § 1102.27 Computing time. (a) General rule. In computing any period of time prescribed... time begins to run is not included. The last day so computed is included, unless it is a...

  3. 12 CFR 1102.27 - Computing time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 10 2014-01-01 2014-01-01 false Computing time. 1102.27 Section 1102.27 Banks... for Proceedings § 1102.27 Computing time. (a) General rule. In computing any period of time prescribed... time begins to run is not included. The last day so computed is included, unless it is a...

  4. 12 CFR 1102.27 - Computing time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 9 2013-01-01 2013-01-01 false Computing time. 1102.27 Section 1102.27 Banks... for Proceedings § 1102.27 Computing time. (a) General rule. In computing any period of time prescribed... time begins to run is not included. The last day so computed is included, unless it is a...

  5. Continuance Acceptance of Computer Based Assessment through the Integration of User's Expectations and Perceptions

    ERIC Educational Resources Information Center

    Terzis, Vasileios; Moridis, Christos N.; Economides, Anastasios A.

    2013-01-01

    The Information Systems (IS) community has put considerable effort on identifying constructs that may explain the initial/continuance use of computer based learning or assessment systems. This study is a further step toward IS continuance acceptance delivered in Computer Based Assessment (CBA) context. Specifically, it aims at the exploration of…

  6. 24 CFR 180.405 - Time computations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Time computations. 180.405 Section... Hearing § 180.405 Time computations. (a) In computing time under this part, the time period begins the day... Saturday, Sunday, or legal holiday observed by the Federal Government, in which case the time...

  7. 24 CFR 180.405 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Time computations. 180.405 Section... Hearing § 180.405 Time computations. (a) In computing time under this part, the time period begins the day... Saturday, Sunday, or legal holiday observed by the Federal Government, in which case the time...

  8. 24 CFR 180.405 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Time computations. 180.405 Section... Hearing § 180.405 Time computations. (a) In computing time under this part, the time period begins the day... Saturday, Sunday, or legal holiday observed by the Federal Government, in which case the time...

  9. 24 CFR 180.405 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Time computations. 180.405 Section... Hearing § 180.405 Time computations. (a) In computing time under this part, the time period begins the day... Saturday, Sunday, or legal holiday observed by the Federal Government, in which case the time...

  10. 24 CFR 180.405 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Time computations. 180.405 Section... Hearing § 180.405 Time computations. (a) In computing time under this part, the time period begins the day... Saturday, Sunday, or legal holiday observed by the Federal Government, in which case the time...

  11. 17 CFR 201.160 - Time computation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 17 Commodity and Securities Exchanges 2 2010-04-01 2010-04-01 false Time computation. 201.160... Rules of Practice General Rules § 201.160 Time computation. (a) Computation. In computing any period of time prescribed in or allowed by these Rules of Practice or by order of the Commission, the day of...

  12. Computational work and time on finite machines.

    NASA Technical Reports Server (NTRS)

    Savage, J. E.

    1972-01-01

    Measures of the computational work and computational delay required by machines to compute functions are given. Exchange inequalities are developed for random access, tape, and drum machines to show that product inequalities between storage and time, number of drum tracks and time, number of bits in an address and time, etc., must be satisfied to compute finite functions on bounded machines.

  13. 17 CFR 201.160 - Time computation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 2 2011-04-01 2011-04-01 false Time computation. 201.160... Rules of Practice General Rules § 201.160 Time computation. (a) Computation. In computing any period of time prescribed in or allowed by these Rules of Practice or by order of the Commission, the day of...

  14. 17 CFR 201.160 - Time computation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 17 Commodity and Securities Exchanges 3 2014-04-01 2014-04-01 false Time computation. 201.160... Rules of Practice General Rules § 201.160 Time computation. (a) Computation. In computing any period of time prescribed in or allowed by these Rules of Practice or by order of the Commission, the day of...

  15. 12 CFR 622.21 - Computing time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 6 2011-01-01 2011-01-01 false Computing time. 622.21 Section 622.21 Banks and... Formal Hearings § 622.21 Computing time. (a) General rule. In computing any period of time prescribed or... run is not to be included. The last day so computed shall be included, unless it is a Saturday,...

  16. 12 CFR 622.21 - Computing time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Computing time. 622.21 Section 622.21 Banks and... Formal Hearings § 622.21 Computing time. (a) General rule. In computing any period of time prescribed or... run is not to be included. The last day so computed shall be included, unless it is a Saturday,...

  17. 17 CFR 201.160 - Time computation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 17 Commodity and Securities Exchanges 2 2012-04-01 2012-04-01 false Time computation. 201.160... Rules of Practice General Rules § 201.160 Time computation. (a) Computation. In computing any period of time prescribed in or allowed by these Rules of Practice or by order of the Commission, the day of...

  18. 17 CFR 201.160 - Time computation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 17 Commodity and Securities Exchanges 2 2013-04-01 2013-04-01 false Time computation. 201.160... Rules of Practice General Rules § 201.160 Time computation. (a) Computation. In computing any period of time prescribed in or allowed by these Rules of Practice or by order of the Commission, the day of...

  19. 24 CFR 26.31 - Time computations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Time computations. 26.31 Section 26... HEARING PROCEDURES Hearings Pursuant to the Administrative Procedure Act § 26.31 Time computations. (a) General. In computing any period of time under subpart B of this part, the time period begins the...

  20. 29 CFR 102.111 - Time computation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 2 2010-07-01 2010-07-01 false Time computation. 102.111 Section 102.111 Labor Regulations... Papers § 102.111 Time computation. (a) In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default after which the designated period of time begins to run...

  1. 24 CFR 1720.165 - Time computation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 5 2011-04-01 2011-04-01 false Time computation. 1720.165 Section... Proceedings General Provisions § 1720.165 Time computation. Computation of any period of time prescribed or... or default initiating such period of time shall have occurred. When the last day of the period...

  2. 29 CFR 18.4 - Time computations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 1 2011-07-01 2011-07-01 false Time computations. 18.4 Section 18.4 Labor Office of the... ADMINISTRATIVE LAW JUDGES General § 18.4 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder the time begins with the day following the act, event,...

  3. 24 CFR 26.31 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Time computations. 26.31 Section 26... HEARING PROCEDURES Hearings Pursuant to the Administrative Procedure Act § 26.31 Time computations. (a) General. In computing any period of time under subpart B of this part, the time period begins the...

  4. 28 CFR 76.8 - Time computations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 28 Judicial Administration 2 2011-07-01 2011-07-01 false Time computations. 76.8 Section 76.8... PENALTIES FOR POSSESSION OF CERTAIN CONTROLLED SUBSTANCES § 76.8 Time computations. (a) Generally. In computing any period of time under this part or in an order issued hereunder, the time begins with the...

  5. 24 CFR 1720.165 - Time computation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Time computation. 1720.165 Section... Proceedings General Provisions § 1720.165 Time computation. Computation of any period of time prescribed or... or default initiating such period of time shall have occurred. When the last day of the period...

  6. 29 CFR 18.4 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... facsimile machine. For purposes of filings by facsimile the time printed on the transmission by the... 29 Labor 1 2010-07-01 2010-07-01 true Time computations. 18.4 Section 18.4 Labor Office of the... ADMINISTRATIVE LAW JUDGES General § 18.4 Time computations. (a) Generally. In computing any period of time...

  7. 29 CFR 102.111 - Time computation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 2 2011-07-01 2011-07-01 false Time computation. 102.111 Section 102.111 Labor Regulations... Papers § 102.111 Time computation. (a) In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default after which the designated period of time begins to run...

  8. 24 CFR 26.31 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Time computations. 26.31 Section 26... HEARING PROCEDURES Hearings Pursuant to the Administrative Procedure Act § 26.31 Time computations. (a) General. In computing any period of time under subpart B of this part, the time period begins the...

  9. 12 CFR 622.21 - Computing time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 7 2013-01-01 2013-01-01 false Computing time. 622.21 Section 622.21 Banks and... Formal Hearings § 622.21 Computing time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or event from which the designated period of time begins...

  10. 24 CFR 1720.165 - Time computation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 5 2012-04-01 2012-04-01 false Time computation. 1720.165 Section... Proceedings General Provisions § 1720.165 Time computation. Computation of any period of time prescribed or... or default initiating such period of time shall have occurred. When the last day of the period...

  11. 29 CFR 18.4 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 1 2012-07-01 2012-07-01 false Time computations. 18.4 Section 18.4 Labor Office of the... ADMINISTRATIVE LAW JUDGES General § 18.4 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder the time begins with the day following the act, event,...

  12. 29 CFR 102.111 - Time computation.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 2 2013-07-01 2013-07-01 false Time computation. 102.111 Section 102.111 Labor Regulations... Papers § 102.111 Time computation. (a) In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default after which the designated period of time begins to run...

  13. 24 CFR 1720.165 - Time computation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 5 2013-04-01 2013-04-01 false Time computation. 1720.165 Section... Proceedings General Provisions § 1720.165 Time computation. Computation of any period of time prescribed or... or default initiating such period of time shall have occurred. When the last day of the period...

  14. 28 CFR 76.8 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 28 Judicial Administration 2 2014-07-01 2014-07-01 false Time computations. 76.8 Section 76.8... PENALTIES FOR POSSESSION OF CERTAIN CONTROLLED SUBSTANCES § 76.8 Time computations. (a) Generally. In computing any period of time under this part or in an order issued hereunder, the time begins with the...

  15. 12 CFR 622.21 - Computing time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 7 2014-01-01 2014-01-01 false Computing time. 622.21 Section 622.21 Banks and... Formal Hearings § 622.21 Computing time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or event from which the designated period of time begins...

  16. 12 CFR 622.21 - Computing time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 7 2012-01-01 2012-01-01 false Computing time. 622.21 Section 622.21 Banks and... Formal Hearings § 622.21 Computing time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or event from which the designated period of time begins...

  17. 28 CFR 76.8 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 28 Judicial Administration 2 2013-07-01 2013-07-01 false Time computations. 76.8 Section 76.8... PENALTIES FOR POSSESSION OF CERTAIN CONTROLLED SUBSTANCES § 76.8 Time computations. (a) Generally. In computing any period of time under this part or in an order issued hereunder, the time begins with the...

  18. 28 CFR 76.8 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 28 Judicial Administration 2 2012-07-01 2012-07-01 false Time computations. 76.8 Section 76.8... PENALTIES FOR POSSESSION OF CERTAIN CONTROLLED SUBSTANCES § 76.8 Time computations. (a) Generally. In computing any period of time under this part or in an order issued hereunder, the time begins with the...

  19. 29 CFR 18.4 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 1 2013-07-01 2013-07-01 false Time computations. 18.4 Section 18.4 Labor Office of the... ADMINISTRATIVE LAW JUDGES General § 18.4 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder the time begins with the day following the act, event,...

  20. 24 CFR 26.31 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Time computations. 26.31 Section 26... HEARING PROCEDURES Hearings Pursuant to the Administrative Procedure Act § 26.31 Time computations. (a) General. In computing any period of time under subpart B of this part, the time period begins the...

  1. 29 CFR 102.111 - Time computation.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 2 2014-07-01 2014-07-01 false Time computation. 102.111 Section 102.111 Labor Regulations... Papers § 102.111 Time computation. (a) In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default after which the designated period of time begins to run...

  2. 24 CFR 1720.165 - Time computation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 5 2014-04-01 2014-04-01 false Time computation. 1720.165 Section... Proceedings General Provisions § 1720.165 Time computation. Computation of any period of time prescribed or... or default initiating such period of time shall have occurred. When the last day of the period...

  3. 29 CFR 102.111 - Time computation.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 2 2012-07-01 2012-07-01 false Time computation. 102.111 Section 102.111 Labor Regulations... Papers § 102.111 Time computation. (a) In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default after which the designated period of time begins to run...

  4. 24 CFR 26.31 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Time computations. 26.31 Section 26... HEARING PROCEDURES Hearings Pursuant to the Administrative Procedure Act § 26.31 Time computations. (a) General. In computing any period of time under subpart B of this part, the time period begins the...

  5. A Matter of Computer Time

    ERIC Educational Resources Information Center

    Celano, Donna; Neuman, Susan B.

    2010-01-01

    Many low-income children do not have the opportunity to develop the computer skills necessary to succeed in our technological economy. Their only access to computers and the Internet--school, afterschool programs, and community organizations--is woefully inadequate. Educators must work to close this knowledge gap and to ensure that low-income…

  6. 16 CFR 1115.14 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Time computations. 1115.14 Section 1115.14... PRODUCT HAZARD REPORTS General Interpretation § 1115.14 Time computations. (a) General. Weekends and holidays are excluded from the computation of the time periods in this part. (b) Imputing knowledge....

  7. 28 CFR 68.8 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Time computations. 68.8 Section 68.8... ALIENS, UNFAIR IMMIGRATION-RELATED EMPLOYMENT PRACTICES, AND DOCUMENT FRAUD § 68.8 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder, the...

  8. 24 CFR 26.11 - Time computation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Time computation. 26.11 Section 26... HEARING PROCEDURES Hearings Before Hearing Officers Pleadings and Motions § 26.11 Time computation. (a) Generally. Computation of any period of time prescribed or allowed by this part shall begin with the...

  9. 12 CFR 908.27 - Computing time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 7 2011-01-01 2011-01-01 false Computing time. 908.27 Section 908.27 Banks and... PRACTICE AND PROCEDURE IN HEARINGS ON THE RECORD General Rules § 908.27 Computing time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or...

  10. 24 CFR 14.100 - Time computation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Time computation. 14.100 Section 14... IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN ADMINISTRATIVE PROCEEDINGS General Provisions § 14.100 Time computation. Time periods stated in this part shall be computed in accordance with the Department's rules...

  11. 12 CFR 908.27 - Computing time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Computing time. 908.27 Section 908.27 Banks and... PRACTICE AND PROCEDURE IN HEARINGS ON THE RECORD General Rules § 908.27 Computing time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or...

  12. 28 CFR 68.8 - Time computations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 28 Judicial Administration 2 2011-07-01 2011-07-01 false Time computations. 68.8 Section 68.8... ALIENS, UNFAIR IMMIGRATION-RELATED EMPLOYMENT PRACTICES, AND DOCUMENT FRAUD § 68.8 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder, the...

  13. 24 CFR 26.11 - Time computation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 1 2011-04-01 2011-04-01 false Time computation. 26.11 Section 26... HEARING PROCEDURES Hearings Before Hearing Officers Pleadings and Motions § 26.11 Time computation. (a) Generally. Computation of any period of time prescribed or allowed by this part shall begin with the...

  14. 24 CFR 14.100 - Time computation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 1 2010-04-01 2010-04-01 false Time computation. 14.100 Section 14... IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN ADMINISTRATIVE PROCEEDINGS General Provisions § 14.100 Time computation. Time periods stated in this part shall be computed in accordance with the Department's rules...

  15. 24 CFR 14.100 - Time computation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Time computation. 14.100 Section 14... IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN ADMINISTRATIVE PROCEEDINGS General Provisions § 14.100 Time computation. Time periods stated in this part shall be computed in accordance with the Department's rules...

  16. 28 CFR 68.8 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 28 Judicial Administration 2 2012-07-01 2012-07-01 false Time computations. 68.8 Section 68.8... ALIENS, UNFAIR IMMIGRATION-RELATED EMPLOYMENT PRACTICES, AND DOCUMENT FRAUD § 68.8 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder, the...

  17. 24 CFR 14.100 - Time computation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Time computation. 14.100 Section 14... IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN ADMINISTRATIVE PROCEEDINGS General Provisions § 14.100 Time computation. Time periods stated in this part shall be computed in accordance with the Department's rules...

  18. 16 CFR 1115.14 - Time computations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 16 Commercial Practices 2 2012-01-01 2012-01-01 false Time computations. 1115.14 Section 1115.14... PRODUCT HAZARD REPORTS General Interpretation § 1115.14 Time computations. (a) General. Weekends and holidays are excluded from the computation of the time periods in this part. (b) Imputing knowledge....

  19. 16 CFR 1115.14 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 16 Commercial Practices 2 2014-01-01 2014-01-01 false Time computations. 1115.14 Section 1115.14... PRODUCT HAZARD REPORTS General Interpretation § 1115.14 Time computations. (a) General. Weekends and holidays are excluded from the computation of the time periods in this part. (b) Imputing knowledge....

  20. 24 CFR 26.11 - Time computation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 1 2013-04-01 2013-04-01 false Time computation. 26.11 Section 26... HEARING PROCEDURES Hearings Before Hearing Officers Pleadings and Motions § 26.11 Time computation. (a) Generally. Computation of any period of time prescribed or allowed by this part shall begin with the...

  1. 28 CFR 68.8 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 28 Judicial Administration 2 2013-07-01 2013-07-01 false Time computations. 68.8 Section 68.8... ALIENS, UNFAIR IMMIGRATION-RELATED EMPLOYMENT PRACTICES, AND DOCUMENT FRAUD § 68.8 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder, the...

  2. 24 CFR 26.11 - Time computation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Time computation. 26.11 Section 26... HEARING PROCEDURES Hearings Before Hearing Officers Pleadings and Motions § 26.11 Time computation. (a) Generally. Computation of any period of time prescribed or allowed by this part shall begin with the...

  3. 12 CFR 1209.17 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 9 2013-01-01 2013-01-01 false Time computations. 1209.17 Section 1209.17... PROCEDURE Rules of Practice and Procedure § 1209.17 Time computations. (a) General rule. In computing any period of time prescribed or allowed under this part, the date of the act or event that commences...

  4. 24 CFR 26.11 - Time computation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Time computation. 26.11 Section 26... HEARING PROCEDURES Hearings Before Hearing Officers Pleadings and Motions § 26.11 Time computation. (a) Generally. Computation of any period of time prescribed or allowed by this part shall begin with the...

  5. 28 CFR 68.8 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 28 Judicial Administration 2 2014-07-01 2014-07-01 false Time computations. 68.8 Section 68.8... ALIENS, UNFAIR IMMIGRATION-RELATED EMPLOYMENT PRACTICES, AND DOCUMENT FRAUD § 68.8 Time computations. (a) Generally. In computing any period of time under these rules or in an order issued hereunder, the...

  6. 24 CFR 14.100 - Time computation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Time computation. 14.100 Section 14... IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN ADMINISTRATIVE PROCEEDINGS General Provisions § 14.100 Time computation. Time periods stated in this part shall be computed in accordance with the Department's rules...

  7. 16 CFR 1115.14 - Time computations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 16 Commercial Practices 2 2013-01-01 2013-01-01 false Time computations. 1115.14 Section 1115.14... PRODUCT HAZARD REPORTS General Interpretation § 1115.14 Time computations. (a) General. Weekends and holidays are excluded from the computation of the time periods in this part. (b) Imputing knowledge....

  8. 12 CFR 1209.17 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 10 2014-01-01 2014-01-01 false Time computations. 1209.17 Section 1209.17... PROCEDURE Rules of Practice and Procedure § 1209.17 Time computations. (a) General rule. In computing any period of time prescribed or allowed under this part, the date of the act or event that commences...

  9. Synchronizing compute node time bases in a parallel computer

    DOEpatents

    Chen, Dong; Faraj, Daniel A; Gooding, Thomas M; Heidelberger, Philip

    2014-12-30

    Synchronizing time bases in a parallel computer that includes compute nodes organized for data communications in a tree network, where one compute node is designated as a root, and, for each compute node: calculating data transmission latency from the root to the compute node; configuring a thread as a pulse waiter; initializing a wakeup unit; and performing a local barrier operation; upon each node completing the local barrier operation, entering, by all compute nodes, a global barrier operation; upon all nodes entering the global barrier operation, sending, to all the compute nodes, a pulse signal; and for each compute node upon receiving the pulse signal: waking, by the wakeup unit, the pulse waiter; setting a time base for the compute node equal to the data transmission latency between the root node and the compute node; and exiting the global barrier operation.

  10. Synchronizing compute node time bases in a parallel computer

    DOEpatents

    Chen, Dong; Faraj, Daniel A; Gooding, Thomas M; Heidelberger, Philip

    2015-01-27

    Synchronizing time bases in a parallel computer that includes compute nodes organized for data communications in a tree network, where one compute node is designated as a root, and, for each compute node: calculating data transmission latency from the root to the compute node; configuring a thread as a pulse waiter; initializing a wakeup unit; and performing a local barrier operation; upon each node completing the local barrier operation, entering, by all compute nodes, a global barrier operation; upon all nodes entering the global barrier operation, sending, to all the compute nodes, a pulse signal; and for each compute node upon receiving the pulse signal: waking, by the wakeup unit, the pulse waiter; setting a time base for the compute node equal to the data transmission latency between the root node and the compute node; and exiting the global barrier operation.

  11. Nurses' acceptance of the decision support computer program for cancer pain management.

    PubMed

    Im, Eun-Ok; Chee, Wonshik

    2006-01-01

    This article describes nurses' acceptance of a decision support computer program for cancer pain management and explores the relationships between the nurses' acceptance and their sociodemographic characteristics. A feminist perspective was used as a theoretical guide for the research process. This was an Internet intervention study among 122 nurses working with cancer patients. Nurses' acceptance of the decision support computer program was measured using the Questionnaire for User Interaction Satisfaction. The data were analyzed using descriptive and inferential statistics, including analysis of variance and correlation analyses. There were significant differences in the total scores of user satisfaction by sex, religion, ethnicity, job title, and specialty. The results suggest that nurses do welcome decision support systems and that nurses' sociodemographic and professional characteristics should be considered in the development of decision support systems. PMID:16554693

  12. 12 CFR 1780.11 - Computing time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 7 2011-01-01 2011-01-01 false Computing time. 1780.11 Section 1780.11 Banks... time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or event that commences the designated period of time is not included. The last day...

  13. 12 CFR 1780.11 - Computing time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Computing time. 1780.11 Section 1780.11 Banks... time. (a) General rule. In computing any period of time prescribed or allowed by this subpart, the date of the act or event that commences the designated period of time is not included. The last day...

  14. Acceptance of Spousal Death: The Factor of Time in Bereaved Older Adults' Search for Meaning

    ERIC Educational Resources Information Center

    Chan, Wallace Chi Ho; Chan, Cecilia L. W.

    2011-01-01

    Response to the death of a spouse was examined by focusing on acceptance, which was conceptualized as both a process and an outcome. Grounded theory was applied to analyze the experience of 15 bereaved Hong Kong Chinese older adults. The main theme that emerged was time. Acceptance of spousal death was found to be related to the search for meaning…

  15. 76 FR 46840 - Time Extension To Accept Proposals, Select One Lessee, and Contract for Hydroelectric Power...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-03

    ... notice was originally published in the Federal Register on April 20, 2011 (76 FR 22143). The due date was... Bureau of Reclamation Time Extension To Accept Proposals, Select One Lessee, and Contract for... proposals detailed in the Notice of Intent to Accept Proposals, Select One Lessee, and Contract...

  16. COOLING TIME, FREEFALL TIME, AND PRECIPITATION IN THE CORES OF ACCEPT GALAXY CLUSTERS

    SciTech Connect

    Voit, G. Mark; Donahue, Megan

    2015-01-20

    Star formation in the universe's largest galaxies—the ones at the centers of galaxy clusters—depends critically on the thermodynamic state of their hot gaseous atmospheres. Central galaxies with low-entropy, high-density atmospheres frequently contain multiphase star-forming gas, while those with high-entropy, low-density atmospheres never do. The dividing line between these two populations in central entropy, and therefore central cooling time, is amazingly sharp. Two hypotheses have been proposed to explain the dichotomy. One points out that thermal conduction can prevent radiative cooling of cluster cores above the dividing line. The other holds that cores below the dividing line are subject to thermal instability that fuels the central active galactic nucleus (AGN) through a cold-feedback mechanism. Here we explore those hypotheses with an analysis of the Hα properties of ACCEPT galaxy clusters. We find that the two hypotheses are likely to be complementary. Our results support a picture in which cold clouds inevitably precipitate out of cluster cores in which cooling outcompetes thermal conduction and rain down on the central black hole, causing AGN feedback that stabilizes the cluster core. In particular, the observed distribution of the cooling-time to freefall-time ratio is nearly identical to that seen in simulations of this cold-feedback process, implying that cold-phase accretion, and not Bondi-like accretion of hot-phase gas, is responsible for the AGN feedback that regulates star formation in large galaxies.

  17. Time-Domain Impedance Boundary Conditions for Computational Aeroacoustics

    NASA Technical Reports Server (NTRS)

    Tam, Christopher K. W.; Auriault, Laurent

    1996-01-01

    It is an accepted practice in aeroacoustics to characterize the properties of an acoustically treated surface by a quantity known as impedance. Impedance is a complex quantity. As such, it is designed primarily for frequency-domain analysis. Time-domain boundary conditions that are the equivalent of the frequency-domain impedance boundary condition are proposed. Both single frequency and model broadband time-domain impedance boundary conditions are provided. It is shown that the proposed boundary conditions, together with the linearized Euler equations, form well-posed initial boundary value problems. Unlike ill-posed problems, they are free from spurious instabilities that would render time-marching computational solutions impossible.

  18. Characterization of real-time computers

    NASA Technical Reports Server (NTRS)

    Shin, K. G.; Krishna, C. M.

    1984-01-01

    A real-time system consists of a computer controller and controlled processes. Despite the synergistic relationship between these two components, they have been traditionally designed and analyzed independently of and separately from each other; namely, computer controllers by computer scientists/engineers and controlled processes by control scientists. As a remedy for this problem, in this report real-time computers are characterized by performance measures based on computer controller response time that are: (1) congruent to the real-time applications, (2) able to offer an objective comparison of rival computer systems, and (3) experimentally measurable/determinable. These measures, unlike others, provide the real-time computer controller with a natural link to controlled processes. In order to demonstrate their utility and power, these measures are first determined for example controlled processes on the basis of control performance functionals. They are then used for two important real-time multiprocessor design applications - the number-power tradeoff and fault-masking and synchronization.

  19. Distributed Real-Time Computing with Harness

    SciTech Connect

    Di Saverio, Emanuele; Cesati, Marco; Di Biagio, Christian; Pennella, Guido; Engelmann, Christian

    2007-01-01

    Modern parallel and distributed computing solutions are often built onto a ''middleware'' software layer providing a higher and common level of service between computational nodes. Harness is an adaptable, plugin-based middleware framework for parallel and distributed computing. This paper reports recent research and development results of using Harness for real-time distributed computing applications in the context of an industrial environment with the needs to perform several safety critical tasks. The presented work exploits the modular architecture of Harness in conjunction with a lightweight threaded implementation to resolve several real-time issues by adding three new Harness plug-ins to provide a prioritized lightweight execution environment, low latency communication facilities, and local timestamped event logging.

  20. 76 FR 45730 - Customer Clearing Documentation and Timing of Acceptance for Clearing

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-01

    ..., Clearing, and Transfer of Customer Positions). On June 16, 2011, the Futures Industry Association (FIA) and... COMMISSION 17 CFR Parts 1, 23, and 39 RIN 3038-AD51 Customer Clearing Documentation and Timing of Acceptance.... These proposed rules address: The documentation between a customer and a futures commission...

  1. Real-time computed optical interferometric tomography

    NASA Astrophysics Data System (ADS)

    Shemonski, Nathan D.; Liu, Yuan-Zhi; Ahmad, Adeel; Adie, Steven G.; Carney, P. Scott; Boppart, Stephen A.

    2014-03-01

    High-resolution tomography is of great importance to many areas of biomedical imaging, but with it comes several apparent tradeoffs such as a narrowing depth-of-field and increasing optical aberrations. Overcoming these challenges has attracted many hardware and computational solutions. Hardware solutions, though, can become bulky or expensive and computational approaches can require high computing power or large processing times. This study demonstrates memory efficient implementations of interferometric synthetic aperture microscopy (ISAM) and computational adaptive optics (CAO) - two computational approaches for overcoming the depthof- field limitation and the effect of optical aberrations in optical coherence tomography (OCT). Traditionally requiring lengthy post processing, here we report implementations of ISAM and CAO on a single GPU for real-time in vivo imaging. Real-time, camera-limited ISAM processing enabled reliable acquisition of stable data for in vivo imaging, and CAO processing on the same GPU is shown to quickly correct static aberrations. These algorithmic advances hold the promise for high-resolution volumetric imaging in time-sensitive situations as well as enabling aberrationfree cellular-level volumetric tomography.

  2. Acceptability of an Embodied Conversational Agent-based Computer Application for Hispanic Women

    PubMed Central

    Wells, Kristen J.; Vázquez-Otero, Coralia; Bredice, Marissa; Meade, Cathy D.; Chaet, Alexis; Rivera, Maria I.; Arroyo, Gloria; Proctor, Sara K.; Barnes, Laura E.

    2015-01-01

    There are few Spanish language interactive, technology-driven health education programs. Objectives of this feasibility study were to: 1) learn more about computer and technology usage among Hispanic women living in a rural community; and 2) evaluate acceptability of the concept of using an embodied conversational agent (ECA) computer application among this population. A survey about computer usage history and interest in computers was administered to a convenience sample of 26 women. A sample video prototype of a hospital discharge ECA was administered followed by questions to gauge opinion about the ECA. Data indicate women exhibited both a high level of computer experience and enthusiasm for the ECA. Feedback from community is essential to ensure equity in state of the art dissemination of health information. Hay algunos programas interactivos en español que usan la tecnología para educar sobre la salud. Los objetivos de este estudio fueron: 1) aprender más sobre el uso de computadoras y tecnología entre mujeres Hispanas que viven en comunidades rurales y 2) evaluar la aceptabilidad del concepto de usar un programa de computadora utilizando un agente de conversación encarnado (ECA) en esta población. Se administro una encuesta sobre el historial de uso y del interés de aprender sobre computadoras fue a 26 mujeres por muestreo de conveniencia. Un ejemplo del prototipo ECA en forma de video de un alta hospitalaria fue administrado y fue seguido por preguntas sobre la opinión que tenían del ECA. Los datos indican que las mujeres mostraron un alto nivel de experiencia con las computadoras y un alto nivel de entusiasmo sobre el ECA. La retroalimentación de la comunidad es esencial para asegurar equidad en la diseminación de información sobre la salud con tecnología de punta. PMID:26671558

  3. Computational model of collective nest selection by ants with heterogeneous acceptance thresholds

    PubMed Central

    Masuda, Naoki; O'shea-Wheller, Thomas A.; Doran, Carolina; Franks, Nigel R.

    2015-01-01

    Collective decision-making is a characteristic of societies ranging from ants to humans. The ant Temnothorax albipennis is known to use quorum sensing to collectively decide on a new home; emigration to a new nest site occurs when the number of ants favouring the new site becomes quorate. There are several possible mechanisms by which ant colonies can select the best nest site among alternatives based on a quorum mechanism. In this study, we use computational models to examine the implications of heterogeneous acceptance thresholds across individual ants in collective nest choice behaviour. We take a minimalist approach to develop a differential equation model and a corresponding non-spatial agent-based model. We show, consistent with existing empirical evidence, that heterogeneity in acceptance thresholds is a viable mechanism for efficient nest choice behaviour. In particular, we show that the proposed models show speed–accuracy trade-offs and speed–cohesion trade-offs when we vary the number of scouts or the quorum threshold. PMID:26543578

  4. Computational model of collective nest selection by ants with heterogeneous acceptance thresholds.

    PubMed

    Masuda, Naoki; O'shea-Wheller, Thomas A; Doran, Carolina; Franks, Nigel R

    2015-06-01

    Collective decision-making is a characteristic of societies ranging from ants to humans. The ant Temnothorax albipennis is known to use quorum sensing to collectively decide on a new home; emigration to a new nest site occurs when the number of ants favouring the new site becomes quorate. There are several possible mechanisms by which ant colonies can select the best nest site among alternatives based on a quorum mechanism. In this study, we use computational models to examine the implications of heterogeneous acceptance thresholds across individual ants in collective nest choice behaviour. We take a minimalist approach to develop a differential equation model and a corresponding non-spatial agent-based model. We show, consistent with existing empirical evidence, that heterogeneity in acceptance thresholds is a viable mechanism for efficient nest choice behaviour. In particular, we show that the proposed models show speed-accuracy trade-offs and speed-cohesion trade-offs when we vary the number of scouts or the quorum threshold. PMID:26543578

  5. Comparing user acceptance of a computer system in two pediatric offices: a qualitative study.

    PubMed Central

    Travers, D. A.; Downs, S. M.

    2000-01-01

    The purpose of this qualitative study was to examine user acceptance of a clinical computer system in two pediatric practices in the southeast. Data were gathered through interviews with practice and IS staff, observations in the clinical area, and review of system implementation records. Five months after implementation, Practice A continued to use the system but Practice B had quit using it because it was unacceptable to the users. The results are presented here, in relation to a conceptual framework, which was originally developed to describe the process of successful implementation of research findings into practice. Five main themes were identified relative to the differences in user acceptance at the two practices: 1) Benefits versus expense of system use varied, 2) Organizational cultures differed, 3) IS staff's relationship with practices differed, 4) Post-implementation experiences differed, and 5) Transfer of technology from the academic center to private practice proved challenging in Practice B. The findings indicate a need for the development and validation of tools to measure healthcare organizational climate and readiness for change. PMID:11080005

  6. 28 CFR 76.8 - Time computations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Time computations. 76.8 Section 76.8 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) RULES OF PROCEDURE FOR ASSESSMENT OF CIVIL... service of a pleading, paper, or notice and the pleading, paper, or notice is served upon the party...

  7. Examining Peer Acceptance in Verbal and Non-Verbal Interaction during Computer-Supported Collaborative Learning: Implications for Inclusion

    ERIC Educational Resources Information Center

    Mavrou, Katerina

    2012-01-01

    This paper discusses the results of peer acceptance in a study investigating the interactions of pairs of disabled and non-disabled pupils working together on computer-based tasks in mainstream primary schools in Cyprus. Twenty dyads of pupils were observed and videotaped while working together at the computer. Data analyses were based on the…

  8. Orbital flux integrations: Parameter values for effective computer time reductions

    NASA Technical Reports Server (NTRS)

    Stassinopoulos, E. G.

    1974-01-01

    To improve computer utilization and to reduce the cost of orbital flux integrations, the effects of integration parameters 'duration' (T) and 'stepsize' (delta t) on integration results were investigated. Over given ranges of T and delta t, and within specified acceptable accuracy restraints, optimal values of these parameters were established for circular subsynchronous trajectories, in terms of the variables altitude (H) and inclination (i). It is shown that (1) above a certain statistically important value, duration is independent of both h and i; (2) stepsize has a relative altitude dependence; and (3) stepsize is not a function of inclination. The substantial savings in computer time are discussed along with the possibility of greater savings by relaxing accuracy restrictions while not exceeding the minimum model-associated uncertainty factors of the environments.

  9. The acceptability of a computer HIV/AIDS risk assessment to not-in-treatment drug users.

    PubMed

    Williams, M L; Freeman, R C; Bowen, A M; Saunders, L

    1998-12-01

    The purpose of this paper is to report the results of a study assessing the acceptability of a computer HIV risk assessment instrument administered to not-in-treatment drug users. The study asked three questions related to acceptability: (1) are drug users comfortable responding to HIV risk questions using the computer assessment; (2) do drug users feel that they possess the requisite skill to respond to questions using a computer; and (3) do drug users believe that the responses they provide using the computer assessment will remain private and confidential. This study differs from other assessments of the acceptability of computer assisted data collection in that the population of interest has only limited education and interaction with computers. Furthermore, the study was implemented under field conditions. To conduct the study, an existing HIV risk assessment instrument was adapted for use with the computer. Only slight modifications were made to the content of the instrument. To facilitate data collection with this population, audio enhancement and touch screen were used. Three scales measuring comfort, skill and perceived privacy were developed. Results of analysis showed that drug users are comfortable responding to an HIV risk assessment using computer assisted interviewing. Drug users also perceived that they possessed the requisite skill to successfully complete the interview. And, study participants reported that they believed that their responses using the computer interview would remain private and confidential. Only minor differences in scale scores based on sociodemographic characteristics were found among study participants. Implications of the findings are discussed. PMID:9924525

  10. Can a website-delivered computer-tailored physical activity intervention be acceptable, usable, and effective for older people?

    PubMed

    Ammann, Rahel; Vandelanotte, Corneel; de Vries, Hein; Mummery, W Kerry

    2013-04-01

    Despite the numerous health benefits, population physical activity levels are low and declining with age. A continued increase of Internet access allows for website-delivered interventions to be implemented across age-groups, though older people have typically not been considered for this type of intervention. Therefore, the purpose of this study was to evaluate a website-delivered computer-tailored physical activity intervention, with a specific focus on differences in tailored advice acceptability, website usability, and physical activity change between three age-groups. To mimic "real-life" conditions, the intervention, which provided personalized physical activity feedback delivered via the Internet, was implemented and evaluated without any personal contact for the entire duration of the study. Data were collected online at baseline, 1-week, and 1-month follow-up and analyzed for three age-groups (≤44, 45-59, and ≥60 years) using linear mixed models. Overall, 803 adults received the intervention and 288 completed all measures. The oldest age-group increased physical activity more than the other two groups, spent the most time on the website, though had significantly lower perceived Internet self-confidence scores when compared with the youngest age-group. No differences were found in terms of website usability and tailored advice acceptability. These results suggest that website-delivered physical activity interventions can be suitable and effective for older aged adults. PMID:23077157

  11. Perspective: Computer simulations of long time dynamics.

    PubMed

    Elber, Ron

    2016-02-14

    Atomically detailed computer simulations of complex molecular events attracted the imagination of many researchers in the field as providing comprehensive information on chemical, biological, and physical processes. However, one of the greatest limitations of these simulations is of time scales. The physical time scales accessible to straightforward simulations are too short to address many interesting and important molecular events. In the last decade significant advances were made in different directions (theory, software, and hardware) that significantly expand the capabilities and accuracies of these techniques. This perspective describes and critically examines some of these advances. PMID:26874473

  12. Perspective: Computer simulations of long time dynamics

    PubMed Central

    Elber, Ron

    2016-01-01

    Atomically detailed computer simulations of complex molecular events attracted the imagination of many researchers in the field as providing comprehensive information on chemical, biological, and physical processes. However, one of the greatest limitations of these simulations is of time scales. The physical time scales accessible to straightforward simulations are too short to address many interesting and important molecular events. In the last decade significant advances were made in different directions (theory, software, and hardware) that significantly expand the capabilities and accuracies of these techniques. This perspective describes and critically examines some of these advances. PMID:26874473

  13. Maintaining Privacy in Pervasive Computing - Enabling Acceptance of Sensor-based Services

    NASA Astrophysics Data System (ADS)

    Soppera, A.; Burbridge, T.

    During the 1980s, Mark Weiser [1] predicted a world in which computing was so pervasive that devices embedded in the environment could sense their relationship to us and to each other. These tiny ubiquitous devices would continually feed information from the physical world into the information world. Twenty years ago, this vision was the exclusive territory of academic computer scientists and science fiction writers. Today this subject has become of interest to business, government, and society. Governmental authorities exercise their power through the networked environment. Credit card databases maintain our credit history and decide whether we are allowed to rent a house or obtain a loan. Mobile telephones can locate us in real time so that we do not miss calls. Within another 10 years, all sorts of devices will be connected through the network. Our fridge, our food, together with our health information, may all be networked for the purpose of maintaining diet and well-being. The Internet will move from being an infrastructure to connect computers, to being an infrastructure to connect everything [2, 3].

  14. Reliable timing systems for computer controlled accelerators

    NASA Astrophysics Data System (ADS)

    Knott, Jürgen; Nettleton, Robert

    1986-06-01

    Over the past decade the use of computers has set new standards for control systems of accelerators with ever increasing complexity coupled with stringent reliability criteria. In fact, with very slow cycling machines or storage rings any erratic operation or timing pulse will cause the loss of precious particles and waste hours of time and effort of preparation. Thus, for the CERN linac and LEAR (Low Energy Antiproton Ring) timing system reliability becomes a crucial factor in the sense that all components must operate practically without fault for very long periods compared to the effective machine cycle. This has been achieved by careful selection of components and design well below thermal and electrical limits, using error detection and correction where possible, as well as developing "safe" decoding techniques for serial data trains. Further, consistent structuring had to be applied in order to obtain simple and flexible modular configurations with very few components on critical paths and to minimize the exchange of information to synchronize accelerators. In addition, this structuring allows the development of efficient strategies for on-line and off-line fault diagnostics. As a result, the timing system for Linac 2 has, so far, been operating without fault for three years, the one for LEAR more than one year since its final debugging.

  15. Real-time electronic adherence monitoring is feasible, comparable to unannounced pill counts, and acceptable

    PubMed Central

    Haberer, Jessica E.; Robbins, Gregory K.; Ybarra, Michele; Monk, Alexandra; Ragland, Kathleen; Weiser, Sheri D.; Johnson, Mallory O.; Bangsberg, David R.

    2011-01-01

    Second generation electronic medication adherence monitors provide real-time data on pill bottle opening behavior. Feasibility, validity, and acceptability, however, have not been established. Med-eMonitor is a multi-compartment adherence device with reminder and education capacity that transmits data through a telephone connection. Monthly adherence levels were measured for 52 participants over approximately three months using the Med-eMonitor (unadjusted and adjusted for participant confirmed dosing) and unannounced pill counts. HIV RNA was assessed before and after the three-month period. Acceptability of Med-eMonitor was determined. Over 92% of Med-eMonitor data was transmitted daily. Unannounced pill counts significantly correlated with adjusted Med-eMonitor adherence (r=0.29, p=0.04). HIV RNA significantly correlated with unannounced pill counts (r=−0.34, p=0.02), and trended toward a significant correlation with unadjusted Med-eMonitor adherence (r=−0.26; p=0.07). Most, but not all, participants liked using the Med-eMonitor. Med-eMonitor allows for real-time adherence monitoring and potentially intervention, which may be critical for prolonging treatment success. PMID:21448728

  16. Real-time accumulative computation motion detectors.

    PubMed

    Fernández-Caballero, Antonio; López, María Teresa; Castillo, José Carlos; Maldonado-Bascón, Saturnino

    2009-01-01

    The neurally inspired accumulative computation (AC) method and its application to motion detection have been introduced in the past years. This paper revisits the fact that many researchers have explored the relationship between neural networks and finite state machines. Indeed, finite state machines constitute the best characterized computational model, whereas artificial neural networks have become a very successful tool for modeling and problem solving. The article shows how to reach real-time performance after using a model described as a finite state machine. This paper introduces two steps towards that direction: (a) A simplification of the general AC method is performed by formally transforming it into a finite state machine. (b) A hardware implementation in FPGA of such a designed AC module, as well as an 8-AC motion detector, providing promising performance results. We also offer two case studies of the use of AC motion detectors in surveillance applications, namely infrared-based people segmentation and color-based people tracking, respectively. PMID:22303161

  17. Real-Time Accumulative Computation Motion Detectors

    PubMed Central

    Fernández-Caballero, Antonio; López, María Teresa; Castillo, José Carlos; Maldonado-Bascón, Saturnino

    2009-01-01

    The neurally inspired accumulative computation (AC) method and its application to motion detection have been introduced in the past years. This paper revisits the fact that many researchers have explored the relationship between neural networks and finite state machines. Indeed, finite state machines constitute the best characterized computational model, whereas artificial neural networks have become a very successful tool for modeling and problem solving. The article shows how to reach real-time performance after using a model described as a finite state machine. This paper introduces two steps towards that direction: (a) A simplification of the general AC method is performed by formally transforming it into a finite state machine. (b) A hardware implementation in FPGA of such a designed AC module, as well as an 8-AC motion detector, providing promising performance results. We also offer two case studies of the use of AC motion detectors in surveillance applications, namely infrared-based people segmentation and color-based people tracking, respectively. PMID:22303161

  18. Spiking neuron computation with the time machine.

    PubMed

    Garg, Vaibhav; Shekhar, Ravi; Harris, John G

    2012-04-01

    The Time Machine (TM) is a spike-based computation architecture that represents synaptic weights in time. This choice of weight representation allows the use of virtual synapses, providing an excellent tradeoff in terms of flexibility, arbitrary weight connections and hardware usage compared to dedicated synapse architectures. The TM supports an arbitrary number of synapses and is limited only by the number of simultaneously active synapses to each neuron. SpikeSim, a behavioral hardware simulator for the architecture, is described along with example algorithms for edge detection and objection recognition. The TM can implement traditional spike-based processing as well as recently developed time mode operations where step functions serve as the input and output of each neuron block. A custom hybrid digital/analog implementation and a fully digital realization of the TM are discussed. An analog chip with 32 neurons, 1024 synapses and an address event representation (AER) block has been fabricated in 0.5 μm technology. A fully digital field-programmable gate array (FPGA)-based implementation of the architecture has 6,144 neurons and 100,352 simultaneously active synapses. Both implementations utilize a digital controller for routing spikes that can process up to 34 million synapses per second. PMID:23852979

  19. Cluster Computing for Embedded/Real-Time Systems

    NASA Technical Reports Server (NTRS)

    Katz, D.; Kepner, J.

    1999-01-01

    Embedded and real-time systems, like other computing systems, seek to maximize computing power for a given price, and thus can significantly benefit from the advancing capabilities of cluster computing.

  20. Gender-based Outcomes and Acceptability of a Computer-assisted Psychosocial Intervention for Substance Use Disorders

    PubMed Central

    Campbell, Aimee N. C.; Nunes, Edward V.; Pavlicova, Martina; Hatch-Maillette, Mary; Hu, Mei-Chen; Bailey, Genie L.; Sugarman, Dawn E.; Miele, Gloria M.; Rieckmann, Traci; Shores-Wilson, Kathy; Turrigiano, Eva; Greenfield, Shelly F.

    2015-01-01

    Background Digital technologies show promise for increasing treatment accessibility and improving quality of care, but little is known about gender differences. This secondary analysis uses data from a multi-site effectiveness trial of a computer-assisted behavioral intervention, conducted within NIDA's National Drug Abuse Clinical Trials Network, to explore gender differences in intervention acceptability and treatment outcomes. Methods Men (n=314) and women (n=192) were randomly assigned to 12-weeks of treatment-as-usual (TAU) or modified TAU + Therapeutic Education System (TES), whereby TES substituted for 2 hours of TAU per week. TES is comprised of 62 web-delivered, multimedia modules, covering skills for achieving and maintaining abstinence plus prize-based incentives contingent on abstinence and treatment adherence. Outcomes were: (1) abstinence from drugs and heavy drinking in the last 4 weeks of treatment, (2) retention, (3) social functioning, and (4) drug and alcohol craving. Acceptability was the mean score across five indicators (i.e., interesting, useful, novel, easy to understand, and satisfaction). Results Gender did not moderate the effect of treatment on any outcome. Women reported higher acceptability scores at week 4 (p=.02), but no gender differences were detected at weeks 8 or 12. Acceptability was positively associated with abstinence, but only among women (p=.01). Conclusions Findings suggest that men and women derive similar benefits from participating in a computer-assisted intervention, a promising outcome as technology-based treatments expand. Acceptability was associated with abstinence outcomes among women. Future research should explore characteristics of women who report less satisfaction with this modality of treatment and ways to improve overall acceptability. PMID:25613105

  1. 5 CFR 185.129 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 1 2013-01-01 2013-01-01 false Computation of time. 185.129 Section 185.129 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS PROGRAM FRAUD CIVIL REMEDIES § 185.129 Computation of time. (a) In computing any period of time under this part or in an order issued thereunder, the time...

  2. 45 CFR 2554.22 - How is time computed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 4 2011-10-01 2011-10-01 false How is time computed? 2554.22 Section 2554.22... SERVICE PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Provisions § 2554.22 How is time computed? (a) In computing any period of time under this part or in an order issued thereunder, the time...

  3. 45 CFR 2554.22 - How is time computed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 4 2010-10-01 2010-10-01 false How is time computed? 2554.22 Section 2554.22... SERVICE PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Provisions § 2554.22 How is time computed? (a) In computing any period of time under this part or in an order issued thereunder, the time...

  4. 45 CFR 2554.22 - How is time computed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 4 2012-10-01 2012-10-01 false How is time computed? 2554.22 Section 2554.22... SERVICE PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Provisions § 2554.22 How is time computed? (a) In computing any period of time under this part or in an order issued thereunder, the time...

  5. 45 CFR 2554.22 - How is time computed?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 4 2013-10-01 2013-10-01 false How is time computed? 2554.22 Section 2554.22... SERVICE PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Provisions § 2554.22 How is time computed? (a) In computing any period of time under this part or in an order issued thereunder, the time...

  6. 45 CFR 2554.22 - How is time computed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 4 2014-10-01 2014-10-01 false How is time computed? 2554.22 Section 2554.22... SERVICE PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Provisions § 2554.22 How is time computed? (a) In computing any period of time under this part or in an order issued thereunder, the time...

  7. Software Accelerates Computing Time for Complex Math

    NASA Technical Reports Server (NTRS)

    2014-01-01

    Ames Research Center awarded Newark, Delaware-based EM Photonics Inc. SBIR funding to utilize graphic processing unit (GPU) technology- traditionally used for computer video games-to develop high-computing software called CULA. The software gives users the ability to run complex algorithms on personal computers with greater speed. As a result of the NASA collaboration, the number of employees at the company has increased 10 percent.

  8. Explorations in Space and Time: Computer-Generated Astronomy Films

    ERIC Educational Resources Information Center

    Meeks, M. L.

    1973-01-01

    Discusses the use of the computer animation technique to travel through space and time and watch models of astronomical systems in motion. Included is a list of eight computer-generated demonstration films entitled Explorations in Space and Time.'' (CC)

  9. Tablet Personal Computer Integration in Higher Education: Applying the Unified Theory of Acceptance and Use Technology Model to Understand Supporting Factors

    ERIC Educational Resources Information Center

    Moran, Mark; Hawkes, Mark; El Gayar, Omar

    2010-01-01

    Many educational institutions have implemented ubiquitous or required laptop, notebook, or tablet personal computing programs for their students. Yet, limited evidence exists to validate integration and acceptance of the technology among student populations. This research examines student acceptance of mobile computing devices using a modification…

  10. Variational time integrators in computational solid mechanics

    NASA Astrophysics Data System (ADS)

    Lew, Adrian Jose

    This thesis develops the theory and implementation of variational integrators for computational solid mechanics problems, and to some extent, for fluid mechanics problems as well. Variational integrators for finite dimensional mechanical systems are succinctly reviewed, and used as the foundations for the extension to continuum systems. The latter is accomplished by way of a space-tune formulation for Lagrangian continuum mechanics that unifies the derivation of tyre balance of linear momentum, energy and configurational forces, all of there as Euler-Lagrange equations of an extended Hamilton's principle. In this formulation, energy conservation and the path independence of the J- and L-integrals are conserved quantities emanating from Noether's theorem. Variational integrators for continuum mechanics are constructed by mimicking this variational structure, and a discrete Noether's theorem for rather general space-tune discretizations is presented. Additionally, the algorithms are automatically (multi)symplectic, and the (multi)symplectic form is uniquely defined by the theory. For instance, in nonlinear elastodynamics the algorithms exactly preserve linear and angular momenta, whenever the continuous system does. A class of variational algorithms is constructed, termed asynchronous variational integrators (AVI), which permit: the selection of independent time steps in each element of a finite element mesh, and the local time steps need riot bear an integral relation to each other. The conservation properties of both synchronous and asynchronous variational integrators are discussed in detail. In particular, AVI are found to nearly conserve energy both locally and globally, a distinguishing feature of variational integrators. The possibility of adapting the elemental time step to exactly satisfy the local energy balance equation, obtained from the extended variational principle, is analyzed. The AVI are also extended to include dissipative systems. The excellent

  11. Computer Center: It's Time to Take Inventory.

    ERIC Educational Resources Information Center

    Spain, James D.

    1984-01-01

    Describes typical instructional applications of computers. Areas considered include: (1) instructional simulations and animations; (2) data analysis; (3) drill and practice; (4) student evaluation; (5) development of computer models and simulations; (6) biometrics or biostatistics; and (7) direct data acquisition and analysis. (JN)

  12. 41 CFR 60-30.3 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 41 Public Contracts and Property Management 1 2010-07-01 2010-07-01 true Computation of time. 60-30.3 Section 60-30.3 Public Contracts and Property Management Other Provisions Relating to Public... ORDER 11246 General Provisions § 60-30.3 Computation of time. In computing any period of time...

  13. 20 CFR 802.221 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Computation of time. 802.221 Section 802.221 Employees' Benefits BENEFITS REVIEW BOARD, DEPARTMENT OF LABOR RULES OF PRACTICE AND PROCEDURE Prereview Procedures Initial Processing § 802.221 Computation of time. (a) In computing any period of time...

  14. 41 CFR 60-30.3 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 41 Public Contracts and Property Management 1 2014-07-01 2014-07-01 false Computation of time. 60-30.3 Section 60-30.3 Public Contracts and Property Management Other Provisions Relating to Public... ORDER 11246 General Provisions § 60-30.3 Computation of time. In computing any period of time...

  15. 10 CFR 2.306 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Computation of time. 2.306 Section 2.306 Energy NUCLEAR... Specific Hearing Procedures, Presiding Officer Powers, and General Hearing Management for NRC Adjudicatory Hearings § 2.306 Computation of time. (a) In computing any period of time, the day of the act, event,...

  16. 5 CFR 185.129 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Computation of time. 185.129 Section 185.129 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS PROGRAM FRAUD CIVIL REMEDIES § 185.129 Computation of time. (a) In computing any period of time under this part or...

  17. 41 CFR 60-30.3 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 41 Public Contracts and Property Management 1 2011-07-01 2009-07-01 true Computation of time. 60-30.3 Section 60-30.3 Public Contracts and Property Management Other Provisions Relating to Public... ORDER 11246 General Provisions § 60-30.3 Computation of time. In computing any period of time...

  18. 41 CFR 60-30.3 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 41 Public Contracts and Property Management 1 2012-07-01 2009-07-01 true Computation of time. 60-30.3 Section 60-30.3 Public Contracts and Property Management Other Provisions Relating to Public... ORDER 11246 General Provisions § 60-30.3 Computation of time. In computing any period of time...

  19. 5 CFR 185.129 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Computation of time. 185.129 Section 185.129 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS PROGRAM FRAUD CIVIL REMEDIES § 185.129 Computation of time. (a) In computing any period of time under this part or...

  20. 5 CFR 185.129 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 5 Administrative Personnel 1 2012-01-01 2012-01-01 false Computation of time. 185.129 Section 185.129 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS PROGRAM FRAUD CIVIL REMEDIES § 185.129 Computation of time. (a) In computing any period of time under this part or...

  1. 5 CFR 410.310 - Computing time in training.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Computing time in training. 410.310... Establishing and Implementing Training Programs § 410.310 Computing time in training. For the purpose of computing time in training for continued service agreements under section 4108 of title 5, United...

  2. 5 CFR 410.310 - Computing time in training.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Computing time in training. 410.310... Establishing and Implementing Training Programs § 410.310 Computing time in training. For the purpose of computing time in training for continued service agreements under section 4108 of title 5, United...

  3. 25 CFR 580.6 - How is time computed?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 2 2013-04-01 2013-04-01 false How is time computed? 580.6 Section 580.6 Indians... RULES OF GENERAL APPLICATION IN APPEAL PROCEEDINGS BEFORE THE COMMISSION § 580.6 How is time computed? In computing any period of time prescribed for filing and serving a document, the first day of...

  4. 14 CFR 302.507 - Computing time for filing complaints.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 4 2014-01-01 2014-01-01 false Computing time for filing complaints. 302... Proceedings With Respect to Rates, Fares and Charges for Foreign Air Transportation § 302.507 Computing time for filing complaints. In computing the time for filing formal complaints pursuant to § 302.506,...

  5. 14 CFR 302.507 - Computing time for filing complaints.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 4 2013-01-01 2013-01-01 false Computing time for filing complaints. 302... Proceedings With Respect to Rates, Fares and Charges for Foreign Air Transportation § 302.507 Computing time for filing complaints. In computing the time for filing formal complaints pursuant to § 302.506,...

  6. 5 CFR 410.310 - Computing time in training.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 1 2014-01-01 2014-01-01 false Computing time in training. 410.310... Establishing and Implementing Training Programs § 410.310 Computing time in training. For the purpose of computing time in training for continued service agreements under section 4108 of title 5, United...

  7. 25 CFR 580.6 - How is time computed?

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 2 2014-04-01 2014-04-01 false How is time computed? 580.6 Section 580.6 Indians... RULES OF GENERAL APPLICATION IN APPEAL PROCEEDINGS BEFORE THE COMMISSION § 580.6 How is time computed? In computing any period of time prescribed for filing and serving a document, the first day of...

  8. 14 CFR 302.507 - Computing time for filing complaints.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 4 2012-01-01 2012-01-01 false Computing time for filing complaints. 302... Proceedings With Respect to Rates, Fares and Charges for Foreign Air Transportation § 302.507 Computing time for filing complaints. In computing the time for filing formal complaints pursuant to § 302.506,...

  9. 5 CFR 410.310 - Computing time in training.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 5 Administrative Personnel 1 2012-01-01 2012-01-01 false Computing time in training. 410.310... Establishing and Implementing Training Programs § 410.310 Computing time in training. For the purpose of computing time in training for continued service agreements under section 4108 of title 5, United...

  10. 43 CFR 4.1185 - Computation of time for decision.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... of Section 521(a)(2) Or 521(a)(3) Orders of Cessation § 4.1185 Computation of time for decision. In computing the 30-day time period for administrative decision, intermediate Saturdays, Sundays, Federal legal... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Computation of time for decision....

  11. 10 CFR 76.74 - Computation and extension of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Computation and extension of time. 76.74 Section 76.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Certification § 76.74 Computation and extension of time. (a) In computing any period of time, the day of the...

  12. 10 CFR 76.74 - Computation and extension of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 10 Energy 2 2014-01-01 2014-01-01 false Computation and extension of time. 76.74 Section 76.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Certification § 76.74 Computation and extension of time. (a) In computing any period of time, the day of the...

  13. 10 CFR 76.74 - Computation and extension of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 10 Energy 2 2012-01-01 2012-01-01 false Computation and extension of time. 76.74 Section 76.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Certification § 76.74 Computation and extension of time. (a) In computing any period of time, the day of the...

  14. 10 CFR 76.74 - Computation and extension of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 2 2011-01-01 2011-01-01 false Computation and extension of time. 76.74 Section 76.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Certification § 76.74 Computation and extension of time. (a) In computing any period of time, the day of the...

  15. 10 CFR 76.74 - Computation and extension of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 2 2013-01-01 2013-01-01 false Computation and extension of time. 76.74 Section 76.74 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Certification § 76.74 Computation and extension of time. (a) In computing any period of time, the day of the...

  16. Quantitative Prediction of Computational Quality (so the S and C Folks will Accept it)

    NASA Technical Reports Server (NTRS)

    Hemsch, Michael J.; Luckring, James M.; Morrison, Joseph H.

    2004-01-01

    Our choice of title may seem strange but we mean each word. In this talk, we are not going to be concerned with computations made "after the fact", i.e. those for which data are available and which are being conducted for explanation and insight. Here we are interested in preventing S&C design problems by finding them through computation before data are available. For such a computation to have any credibility with those who absorb the risk, it is necessary to quantitatively PREDICT the quality of the computational results.

  17. 45 CFR 150.429 - Computation of time and extensions of time.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 1 2011-10-01 2011-10-01 false Computation of time and extensions of time. 150... § 150.429 Computation of time and extensions of time. (a) For purposes of this subpart, in computing any period of time, the time begins with the day following the act, event, or default and includes the...

  18. 45 CFR 150.429 - Computation of time and extensions of time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Computation of time and extensions of time. 150... § 150.429 Computation of time and extensions of time. (a) For purposes of this subpart, in computing any period of time, the time begins with the day following the act, event, or default and includes the...

  19. 14 CFR 13.44 - Computation of time and extension of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Computation of time and extension of time. 13.44 Section 13.44 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF....44 Computation of time and extension of time. (a) In computing any period of time prescribed...

  20. 14 CFR 13.44 - Computation of time and extension of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Computation of time and extension of time. 13.44 Section 13.44 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF....44 Computation of time and extension of time. (a) In computing any period of time prescribed...

  1. 14 CFR 13.44 - Computation of time and extension of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Computation of time and extension of time. 13.44 Section 13.44 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF....44 Computation of time and extension of time. (a) In computing any period of time prescribed...

  2. 14 CFR 13.44 - Computation of time and extension of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Computation of time and extension of time. 13.44 Section 13.44 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF....44 Computation of time and extension of time. (a) In computing any period of time prescribed...

  3. 5 CFR 831.107 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Computation of time. 831.107 Section 831.107 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) RETIREMENT Administration and General Provisions § 831.107 Computation of time. In computing...

  4. 4 CFR 28.4 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 4 Accounts 1 2010-01-01 2010-01-01 false Computation of time. 28.4 Section 28.4 Accounts... Purpose, General Definitions, and Jurisdiction § 28.4 Computation of time. (a) To compute the number of... Board after 4 p.m., Monday through Friday....

  5. 47 CFR 1.4 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Computation of time. 1.4 Section 1.4 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL PRACTICE AND PROCEDURE General Rules of Practice and Procedure General § 1.4 Computation of time. (a) Purpose. The purpose of this rule section is to detail the method for computing the amount of...

  6. 14 CFR 1264.126 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 5 2011-01-01 2010-01-01 true Computation of time. 1264.126 Section 1264.126 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL PENALTIES ACT OF 1986 § 1264.126 Computation of time. (a) In computing any period of...

  7. 14 CFR 1264.126 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 5 2010-01-01 2010-01-01 false Computation of time. 1264.126 Section 1264.126 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL PENALTIES ACT OF 1986 § 1264.126 Computation of time. (a) In computing any period of...

  8. 45 CFR 681.24 - How is time computed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 3 2010-10-01 2010-10-01 false How is time computed? 681.24 Section 681.24 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Procedures § 681.24 How is time computed? (a) In computing any period...

  9. 45 CFR 681.24 - How is time computed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 3 2011-10-01 2011-10-01 false How is time computed? 681.24 Section 681.24 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Procedures § 681.24 How is time computed? (a) In computing any period...

  10. 45 CFR 681.24 - How is time computed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 3 2012-10-01 2012-10-01 false How is time computed? 681.24 Section 681.24 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Procedures § 681.24 How is time computed? (a) In computing any period...

  11. 45 CFR 681.24 - How is time computed?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 3 2013-10-01 2013-10-01 false How is time computed? 681.24 Section 681.24 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Procedures § 681.24 How is time computed? (a) In computing any period...

  12. 45 CFR 681.24 - How is time computed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 3 2014-10-01 2014-10-01 false How is time computed? 681.24 Section 681.24 Public Welfare Regulations Relating to Public Welfare (Continued) NATIONAL SCIENCE FOUNDATION PROGRAM FRAUD CIVIL REMEDIES ACT REGULATIONS Hearing Procedures § 681.24 How is time computed? (a) In computing any period...

  13. 4 CFR 28.4 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 4 Accounts 1 2013-01-01 2013-01-01 false Computation of time. 28.4 Section 28.4 Accounts... Purpose, General Definitions, and Jurisdiction § 28.4 Computation of time. (a) To compute the number of... Board after 4 p.m., Monday through Friday....

  14. 14 CFR 1264.126 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 5 2012-01-01 2012-01-01 false Computation of time. 1264.126 Section 1264.126 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL PENALTIES ACT OF 1986 § 1264.126 Computation of time. (a) In computing any period of...

  15. 14 CFR § 1264.126 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 5 2014-01-01 2014-01-01 false Computation of time. § 1264.126 Section § 1264.126 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL PENALTIES ACT OF 1986 § 1264.126 Computation of time. (a) In computing any period...

  16. 14 CFR 1264.126 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 5 2013-01-01 2013-01-01 false Computation of time. 1264.126 Section 1264.126 Aeronautics and Space NATIONAL AERONAUTICS AND SPACE ADMINISTRATION IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL PENALTIES ACT OF 1986 § 1264.126 Computation of time. (a) In computing any period of...

  17. 21 CFR 810.3 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Computation of time. 810.3 Section 810.3 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE RECALL AUTHORITY General Provisions § 810.3 Computation of time. In computing any period...

  18. 21 CFR 810.3 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Computation of time. 810.3 Section 810.3 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE RECALL AUTHORITY General Provisions § 810.3 Computation of time. In computing any period...

  19. 21 CFR 810.3 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Computation of time. 810.3 Section 810.3 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE RECALL AUTHORITY General Provisions § 810.3 Computation of time. In computing any period...

  20. 21 CFR 810.3 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Computation of time. 810.3 Section 810.3 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE RECALL AUTHORITY General Provisions § 810.3 Computation of time. In computing any period...

  1. 32 CFR 1656.18 - Computation of creditable time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Alternative Service has been suspended. (b) Creditable time will be awarded for periods of travel, job... 32 National Defense 6 2012-07-01 2012-07-01 false Computation of creditable time. 1656.18 Section... ALTERNATIVE SERVICE § 1656.18 Computation of creditable time. (a) Creditable time starts when the ASW...

  2. 32 CFR 1656.18 - Computation of creditable time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Alternative Service has been suspended. (b) Creditable time will be awarded for periods of travel, job... 32 National Defense 6 2011-07-01 2011-07-01 false Computation of creditable time. 1656.18 Section... ALTERNATIVE SERVICE § 1656.18 Computation of creditable time. (a) Creditable time starts when the ASW...

  3. 32 CFR 1656.18 - Computation of creditable time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Alternative Service has been suspended. (b) Creditable time will be awarded for periods of travel, job... 32 National Defense 6 2013-07-01 2013-07-01 false Computation of creditable time. 1656.18 Section... ALTERNATIVE SERVICE § 1656.18 Computation of creditable time. (a) Creditable time starts when the ASW...

  4. 32 CFR 1656.18 - Computation of creditable time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Alternative Service has been suspended. (b) Creditable time will be awarded for periods of travel, job... 32 National Defense 6 2010-07-01 2010-07-01 false Computation of creditable time. 1656.18 Section... ALTERNATIVE SERVICE § 1656.18 Computation of creditable time. (a) Creditable time starts when the ASW...

  5. 32 CFR 1656.18 - Computation of creditable time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Alternative Service has been suspended. (b) Creditable time will be awarded for periods of travel, job... 32 National Defense 6 2014-07-01 2014-07-01 false Computation of creditable time. 1656.18 Section... ALTERNATIVE SERVICE § 1656.18 Computation of creditable time. (a) Creditable time starts when the ASW...

  6. Evaluating the Acceptance of Cloud-Based Productivity Computer Solutions in Small and Medium Enterprises

    ERIC Educational Resources Information Center

    Dominguez, Alfredo

    2013-01-01

    Cloud computing has emerged as a new paradigm for on-demand delivery and consumption of shared IT resources over the Internet. Research has predicted that small and medium organizations (SMEs) would be among the earliest adopters of cloud solutions; however, this projection has not materialized. This study set out to investigate if behavior…

  7. The Adoption of Grid Computing Technology by Organizations: A Quantitative Study Using Technology Acceptance Model

    ERIC Educational Resources Information Center

    Udoh, Emmanuel E.

    2010-01-01

    Advances in grid technology have enabled some organizations to harness enormous computational power on demand. However, the prediction of widespread adoption of the grid technology has not materialized despite the obvious grid advantages. This situation has encouraged intense efforts to close the research gap in the grid adoption process. In this…

  8. 40 CFR 72.11 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Computation of time. 72.11 Section 72.11 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) PERMITS REGULATION Acid Rain Program General Provisions § 72.11 Computation of time. (a) Unless otherwise stated, any time period scheduled, under...

  9. 7 CFR 1.603 - How are time periods computed?

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 1 2011-01-01 2011-01-01 false How are time periods computed? 1.603 Section 1.603 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses General Provisions § 1.603 How are time periods computed? (a) General. Time periods are...

  10. 7 CFR 1.603 - How are time periods computed?

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 1 2013-01-01 2013-01-01 false How are time periods computed? 1.603 Section 1.603 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses General Provisions § 1.603 How are time periods computed? (a) General. Time periods are...

  11. 7 CFR 1.603 - How are time periods computed?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 1 2012-01-01 2012-01-01 false How are time periods computed? 1.603 Section 1.603 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses General Provisions § 1.603 How are time periods computed? (a) General. Time periods are...

  12. 7 CFR 1.603 - How are time periods computed?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 1 2014-01-01 2014-01-01 false How are time periods computed? 1.603 Section 1.603 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses General Provisions § 1.603 How are time periods computed? (a) General. Time periods are...

  13. 7 CFR 1.603 - How are time periods computed?

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 1 2010-01-01 2010-01-01 false How are time periods computed? 1.603 Section 1.603 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Conditions in FERC Hydropower Licenses General Provisions § 1.603 How are time periods computed? (a) General. Time periods are...

  14. Evolution of the International Atomic Time TAI computation

    NASA Technical Reports Server (NTRS)

    Granveaud, M.

    1979-01-01

    The computation of the International Atomic Time (TAI), a worldwide time reference, is briefly examined. The types of atomic clocks, computation procedures, and time intercomparison between clocks utilizing navigation satellites are addressed. Changes in the system would essentially depend on the improvement of the atomic clocks.

  15. 29 CFR 18.4 - Time computations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... other than complaints is deemed effected at the time of mailing. (3) Whenever a party has the right or... mail, five (5) days shall be added to the prescribed period. (d) Filing or service by facsimile. Filing... facsimile machine. For purposes of filings by facsimile the time printed on the transmission by...

  16. Accessing Computers in Education, One Byte at a Time.

    ERIC Educational Resources Information Center

    Manzo, Anthony V.

    This paper discusses computers and their potential role in education. The term "byte" is first explained, to emphasize the idea that the use of computers should be implemented one "byte" or step at a time. The reasons for this approach are then outlined. Potential applications in computer usage in educational administration are suggested, computer…

  17. Real-Time, Sensor-Based Computing in the Laboratory.

    ERIC Educational Resources Information Center

    Badmus, O. O.; And Others

    1996-01-01

    Demonstrates the importance of Real-Time, Sensor-Based (RTSB) computing and how it can be easily and effectively integrated into university student laboratories. Describes the experimental processes, the process instrumentation and process-computer interface, the computer and communications systems, and typical software. Provides much technical…

  18. Long time behavior of unsteady flow computations

    NASA Technical Reports Server (NTRS)

    Hariharan, S. I.

    1992-01-01

    This paper addresses a specific issue of time accuracy in the calculation of external aerodynamic problems. The class of problems discussed consists of inviscid compressible subsonic flows. These problems are governed by a convective equation. A key issue that is not understood is the long time behavior of the solution. This is important if one desires transient calculations of problems governed by the Euler equations or its derivatives such as the small disturbance equations or the potential formulations for the gust problem. Difficulties arise for two dimensional problems where the time rate decay solutions of the wave equation is slow. In concert with the above mentioned problem, exterior flows require proper modeling of the boundary conditions. In particular, this requires the truncation of infinite regions into finite regions with the aid of artificial boundaries. These boundary conditions must be consistent with the physics of the unbounded problem as well as consistent in time and space. Our treatment of the problem is discussed in detail and examples are given to verify the results.

  19. Influence of computer work under time pressure on cardiac activity.

    PubMed

    Shi, Ping; Hu, Sijung; Yu, Hongliu

    2015-03-01

    Computer users are often under stress when required to complete computer work within a required time. Work stress has repeatedly been associated with an increased risk for cardiovascular disease. The present study examined the effects of time pressure workload during computer tasks on cardiac activity in 20 healthy subjects. Heart rate, time domain and frequency domain indices of heart rate variability (HRV) and Poincaré plot parameters were compared among five computer tasks and two rest periods. Faster heart rate and decreased standard deviation of R-R interval were noted in response to computer tasks under time pressure. The Poincaré plot parameters showed significant differences between different levels of time pressure workload during computer tasks, and between computer tasks and the rest periods. In contrast, no significant differences were identified for the frequency domain indices of HRV. The results suggest that the quantitative Poincaré plot analysis used in this study was able to reveal the intrinsic nonlinear nature of the autonomically regulated cardiac rhythm. Specifically, heightened vagal tone occurred during the relaxation computer tasks without time pressure. In contrast, the stressful computer tasks with added time pressure stimulated cardiac sympathetic activity. PMID:25614130

  20. A Simple Computer Interface To Time Relatively Slow Physical Events.

    ERIC Educational Resources Information Center

    Ocaya, R. O.

    2000-01-01

    Describes a simple computer interface that can be used to make reliable time measurements, such as when timing the swings of a pendulum. Presents a sample experiment involving a form of pendulum known as the compound pendulum. (Author/YDS)

  1. Real time computer controlled weld skate

    NASA Technical Reports Server (NTRS)

    Wall, W. A., Jr.

    1977-01-01

    A real time, adaptive control, automatic welding system was developed. This system utilizes the general case geometrical relationships between a weldment and a weld skate to precisely maintain constant weld speed and torch angle along a contoured workplace. The system is compatible with the gas tungsten arc weld process or can be adapted to other weld processes. Heli-arc cutting and machine tool routing operations are possible applications.

  2. Usability and Acceptability of ASSESS MS: Assessment of Motor Dysfunction in Multiple Sclerosis Using Depth-Sensing Computer Vision

    PubMed Central

    Dorn, Jonas F; Burggraaff, Jessica; Kamm, Christian Philipp; Steinheimer, Saskia Marie; Kontschieder, Peter; Criminisi, Antonio; Uitdehaag, Bernard; Dahlke, Frank; Kappos, Ludwig; Sellen, Abigail

    2015-01-01

    Background Sensor-based recordings of human movements are becoming increasingly important for the assessment of motor symptoms in neurological disorders beyond rehabilitative purposes. ASSESS MS is a movement recording and analysis system being developed to automate the classification of motor dysfunction in patients with multiple sclerosis (MS) using depth-sensing computer vision. It aims to provide a more consistent and finer-grained measurement of motor dysfunction than currently possible. Objective To test the usability and acceptability of ASSESS MS with health professionals and patients with MS. Methods A prospective, mixed-methods study was carried out at 3 centers. After a 1-hour training session, a convenience sample of 12 health professionals (6 neurologists and 6 nurses) used ASSESS MS to capture recordings of standardized movements performed by 51 volunteer patients. Metrics for effectiveness, efficiency, and acceptability were defined and used to analyze data captured by ASSESS MS, video recordings of each examination, feedback questionnaires, and follow-up interviews. Results All health professionals were able to complete recordings using ASSESS MS, achieving high levels of standardization on 3 of 4 metrics (movement performance, lateral positioning, and clear camera view but not distance positioning). Results were unaffected by patients’ level of physical or cognitive disability. ASSESS MS was perceived as easy to use by both patients and health professionals with high scores on the Likert-scale questions and positive interview commentary. ASSESS MS was highly acceptable to patients on all dimensions considered, including attitudes to future use, interaction (with health professionals), and overall perceptions of ASSESS MS. Health professionals also accepted ASSESS MS, but with greater ambivalence arising from the need to alter patient interaction styles. There was little variation in results across participating centers, and no differences between

  3. 5 CFR 838.131 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Computation of time. 838.131 Section 838.131 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) COURT ORDERS AFFECTING RETIREMENT BENEFITS Court Orders Generally Procedures Applicable to All Court Orders § 838.131 Computation of time....

  4. 42 CFR 1005.12 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 5 2013-10-01 2013-10-01 false Computation of time. 1005.12 Section 1005.12 Public Health OFFICE OF INSPECTOR GENERAL-HEALTH CARE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OIG AUTHORITIES APPEALS OF EXCLUSIONS, CIVIL MONEY PENALTIES AND ASSESSMENTS § 1005.12 Computation of time. (a)...

  5. 42 CFR 1005.12 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 5 2014-10-01 2014-10-01 false Computation of time. 1005.12 Section 1005.12 Public Health OFFICE OF INSPECTOR GENERAL-HEALTH CARE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OIG AUTHORITIES APPEALS OF EXCLUSIONS, CIVIL MONEY PENALTIES AND ASSESSMENTS § 1005.12 Computation of time. (a)...

  6. 42 CFR 1005.12 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 5 2010-10-01 2010-10-01 false Computation of time. 1005.12 Section 1005.12 Public Health OFFICE OF INSPECTOR GENERAL-HEALTH CARE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OIG AUTHORITIES APPEALS OF EXCLUSIONS, CIVIL MONEY PENALTIES AND ASSESSMENTS § 1005.12 Computation of time. (a)...

  7. 43 CFR 45.3 - How are time periods computed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false How are time periods computed? 45.3 Section 45.3 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES General Provisions § 45.3 How are time periods computed? (a)...

  8. 43 CFR 45.3 - How are time periods computed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 43 Public Lands: Interior 1 2011-10-01 2011-10-01 false How are time periods computed? 45.3 Section 45.3 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES General Provisions § 45.3 How are time periods computed? (a)...

  9. 43 CFR 45.3 - How are time periods computed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 43 Public Lands: Interior 1 2012-10-01 2011-10-01 true How are time periods computed? 45.3 Section 45.3 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES General Provisions § 45.3 How are time periods computed? (a) General....

  10. 43 CFR 45.3 - How are time periods computed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 43 Public Lands: Interior 1 2014-10-01 2014-10-01 false How are time periods computed? 45.3 Section 45.3 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES General Provisions § 45.3 How are time periods computed? (a)...

  11. 43 CFR 45.3 - How are time periods computed?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 43 Public Lands: Interior 1 2013-10-01 2013-10-01 false How are time periods computed? 45.3 Section 45.3 Public Lands: Interior Office of the Secretary of the Interior CONDITIONS AND PRESCRIPTIONS IN FERC HYDROPOWER LICENSES General Provisions § 45.3 How are time periods computed? (a)...

  12. 5 CFR 410.310 - Computing time in training.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 1 2013-01-01 2013-01-01 false Computing time in training. 410.310 Section 410.310 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS TRAINING Establishing and Implementing Training Programs § 410.310 Computing time in training. For the purpose...

  13. 15 CFR 930.124 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 15 Commerce and Foreign Trade 3 2011-01-01 2011-01-01 false Computation of time. 930.124 Section... MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Appeal to the Secretary for Review Related to the Objectives of the Act and National Security Interests § 930.124 Computation of time....

  14. 40 CFR 222.13 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Computation of time. 222.13 Section 222.13 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING ACTION ON OCEAN DUMPING PERMIT APPLICATIONS UNDER SECTION 102 OF THE ACT § 222.13 Computation of time....

  15. 5 CFR 838.131 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 2 2014-01-01 2014-01-01 false Computation of time. 838.131 Section 838.131 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) COURT ORDERS AFFECTING RETIREMENT BENEFITS Court Orders Generally Procedures Applicable to All Court Orders § 838.131 Computation of time....

  16. 5 CFR 890.101 - Definitions; time computations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 2 2011-01-01 2011-01-01 false Definitions; time computations. 890.101 Section 890.101 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) FEDERAL EMPLOYEES HEALTH BENEFITS PROGRAM Administration and General Provisions § 890.101 Definitions; time computations. (a)...

  17. 48 CFR 6101.3 - Time: enlargement; computation [Rule 3].

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 48 Federal Acquisition Regulations System 7 2013-10-01 2012-10-01 true Time: enlargement; computation . 6101.3 Section 6101.3 Federal Acquisition Regulations System CIVILIAN BOARD OF CONTRACT APPEALS, GENERAL SERVICES ADMINISTRATION CONTRACT DISPUTE CASES 6101.3 Time: enlargement; computation . (a)...

  18. 39 CFR 963.6 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 39 Postal Service 1 2010-07-01 2010-07-01 false Computation of time. 963.6 Section 963.6 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO VIOLATIONS OF THE PANDERING ADVERTISEMENTS STATUTE, 39 U.S.C. 3008 § 963.6 Computation of time. A designated...

  19. 14 CFR 406.119 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Computation of time. 406.119 Section 406.119 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT... in FAA Space Transportation Adjudications § 406.119 Computation of time. (a) This section applies...

  20. 14 CFR 16.17 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Computation of time. 16.17 Section 16.17 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES RULES OF..., Proceedings Initiated by the FAA, and Appeals § 16.17 Computation of time. This section applies to any...

  1. 14 CFR 302.8 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Computation of time. 302.8 Section 302.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PROCEDURAL REGULATIONS RULES OF PRACTICE IN PROCEEDINGS Rules of General Applicability § 302.8 Computation of time....

  2. 14 CFR 16.17 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Computation of time. 16.17 Section 16.17 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES RULES OF..., Proceedings Initiated by the FAA, and Appeals § 16.17 Computation of time. This section applies to any...

  3. 14 CFR 302.8 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Computation of time. 302.8 Section 302.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PROCEDURAL REGULATIONS RULES OF PRACTICE IN PROCEEDINGS Rules of General Applicability § 302.8 Computation of time....

  4. 14 CFR 406.119 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Computation of time. 406.119 Section 406.119 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT... in FAA Space Transportation Adjudications § 406.119 Computation of time. (a) This section applies...

  5. 39 CFR 954.23 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 39 Postal Service 1 2011-07-01 2011-07-01 false Computation of time. 954.23 Section 954.23 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO THE DENIAL, SUSPENSION, OR REVOCATION OF PERIODICALS MAIL PRIVILEGES § 954.23 Computation of time. A designated period...

  6. 39 CFR 954.23 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 39 Postal Service 1 2012-07-01 2012-07-01 false Computation of time. 954.23 Section 954.23 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO THE DENIAL, SUSPENSION, OR REVOCATION OF PERIODICALS MAIL PRIVILEGES § 954.23 Computation of time. A designated period...

  7. 39 CFR 954.23 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 39 Postal Service 1 2013-07-01 2013-07-01 false Computation of time. 954.23 Section 954.23 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO THE DENIAL, SUSPENSION, OR REVOCATION OF PERIODICALS MAIL PRIVILEGES § 954.23 Computation of time. A designated period...

  8. 39 CFR 954.23 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 39 Postal Service 1 2014-07-01 2014-07-01 false Computation of time. 954.23 Section 954.23 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO THE DENIAL, SUSPENSION, OR REVOCATION OF PERIODICALS MAIL PRIVILEGES § 954.23 Computation of time. A designated period...

  9. 39 CFR 954.23 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 39 Postal Service 1 2010-07-01 2010-07-01 false Computation of time. 954.23 Section 954.23 Postal Service UNITED STATES POSTAL SERVICE PROCEDURES RULES OF PRACTICE IN PROCEEDINGS RELATIVE TO THE DENIAL, SUSPENSION, OR REVOCATION OF PERIODICALS MAIL PRIVILEGES § 954.23 Computation of time. A designated period...

  10. 14 CFR 406.119 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 4 2013-01-01 2013-01-01 false Computation of time. 406.119 Section 406.119 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT... in FAA Space Transportation Adjudications § 406.119 Computation of time. (a) This section applies...

  11. 14 CFR 17.7 - Filing and computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Filing and computation of time. 17.7 Section 17.7 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES PROCEDURES FOR PROTESTS AND CONTRACT DISPUTES General § 17.7 Filing and computation of time. (a) Filing of a protest or contract dispute...

  12. 14 CFR 302.8 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 4 2012-01-01 2012-01-01 false Computation of time. 302.8 Section 302.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PROCEDURAL REGULATIONS RULES OF PRACTICE IN PROCEEDINGS Rules of General Applicability § 302.8 Computation of time....

  13. 14 CFR 13.212 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Computation of time. 13.212 Section 13.212 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES INVESTIGATIVE AND ENFORCEMENT PROCEDURES Rules of Practice in FAA Civil Penalty Actions § 13.212 Computation of time. (a) This section applies to...

  14. 14 CFR 302.8 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 4 2014-01-01 2014-01-01 false Computation of time. 302.8 Section 302.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PROCEDURAL REGULATIONS RULES OF PRACTICE IN PROCEEDINGS Rules of General Applicability § 302.8 Computation of time....

  15. 14 CFR 406.119 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 4 2014-01-01 2014-01-01 false Computation of time. 406.119 Section 406.119 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT... in FAA Space Transportation Adjudications § 406.119 Computation of time. (a) This section applies...

  16. 14 CFR 406.119 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 4 2012-01-01 2012-01-01 false Computation of time. 406.119 Section 406.119 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION ADMINISTRATION, DEPARTMENT... in FAA Space Transportation Adjudications § 406.119 Computation of time. (a) This section applies...

  17. 14 CFR 302.8 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 4 2013-01-01 2013-01-01 false Computation of time. 302.8 Section 302.8 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) PROCEDURAL REGULATIONS RULES OF PRACTICE IN PROCEEDINGS Rules of General Applicability § 302.8 Computation of time....

  18. 14 CFR 16.17 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Computation of time. 16.17 Section 16.17 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES RULES OF..., Proceedings Initiated by the FAA, and Appeals § 16.17 Computation of time. This section applies to any...

  19. 14 CFR 16.17 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Computation of time. 16.17 Section 16.17 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES RULES OF..., Proceedings Initiated by the FAA, and Appeals § 16.17 Computation of time. This section applies to any...

  20. Time-Domain Computation Of Electromagnetic Fields In MMICs

    NASA Technical Reports Server (NTRS)

    Lansing, Faiza S.; Rascoe, Daniel L.

    1995-01-01

    Maxwell's equations solved on three-dimensional, conformed orthogonal grids by finite-difference techniques. Method of computing frequency-dependent electrical parameters of monolithic microwave integrated circuit (MMIC) involves time-domain computation of propagation of electromagnetic field in response to excitation by single pulse at input terminal, followed by computation of Fourier transforms to obtain frequency-domain response from time-domain response. Parameters computed include electric and magnetic fields, voltages, currents, impedances, scattering parameters, and effective dielectric constants. Powerful and efficient means for analyzing performance of even complicated MMIC.

  1. 14 CFR 13.44 - Computation of time and extension of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Computation of time and extension of time. 13.44 Section 13.44 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES INVESTIGATIVE AND ENFORCEMENT PROCEDURES Rules of Practice for FAA Hearings § 13.44 Computation of time and extension of time....

  2. A tool for modeling concurrent real-time computation

    NASA Technical Reports Server (NTRS)

    Sharma, D. D.; Huang, Shie-Rei; Bhatt, Rahul; Sridharan, N. S.

    1990-01-01

    Real-time computation is a significant area of research in general, and in AI in particular. The complexity of practical real-time problems demands use of knowledge-based problem solving techniques while satisfying real-time performance constraints. Since the demands of a complex real-time problem cannot be predicted (owing to the dynamic nature of the environment) powerful dynamic resource control techniques are needed to monitor and control the performance. A real-time computation model for a real-time tool, an implementation of the QP-Net simulator on a Symbolics machine, and an implementation on a Butterfly multiprocessor machine are briefly described.

  3. A Formal Model for Real-Time Parallel Computation

    SciTech Connect

    Hui, Peter SY; Chikkagoudar, Satish

    2012-12-29

    The imposition of real-time constraints on a parallel computing environment--- specifically high-performance, cluster-computing systems--- introduces a variety of challenges with respect to the formal verification of the system's timing properties. In this paper, we briefly motivate the need for such a system, and we introduce an automaton-based method for performing such formal verification. We define the concept of a consistent parallel timing system: a hybrid system consisting of a set of timed automata (specifically, timed Buechi automata as well as a timed variant of standard finite automata), intended to model the timing properties of a well-behaved real-time parallel system. Finally, we give a brief case study to demonstrate the concepts in the paper: a parallel matrix multiplication kernel which operates within provable upper time bounds. We give the algorithm used, a corresponding consistent parallel timing system, and empirical results showing that the system operates under the specified timing constraints.

  4. Universal quantum computation using the discrete-time quantum walk

    SciTech Connect

    Lovett, Neil B.; Cooper, Sally; Everitt, Matthew; Trevers, Matthew; Kendon, Viv

    2010-04-15

    A proof that continuous-time quantum walks are universal for quantum computation, using unweighted graphs of low degree, has recently been presented by A. M. Childs [Phys. Rev. Lett. 102, 180501 (2009)]. We present a version based instead on the discrete-time quantum walk. We show that the discrete-time quantum walk is able to implement the same universal gate set and thus both discrete and continuous-time quantum walks are computational primitives. Additionally, we give a set of components on which the discrete-time quantum walk provides perfect state transfer.

  5. Dwell time calculation for computer controlled large tool

    NASA Astrophysics Data System (ADS)

    Fan, Bin; Burge, James H.; Martin, Hubert; Zeng, Zhige; Li, Xiaojin; Zhou, Jiabin

    2012-09-01

    The Computer-controlled Large-tool such as the stressed-lap which firstly developed in the Steward Observatory Mirror Lab (SOML) [1]and the Computer controlled active lap which developed in the IOE (Institute of Optics and Electronics, Chinese Academy of Science), those large tools are controlled by computer to manufacturing large optics, especially for grinding with loose abrasive and polishing with slurry. Comparing the fixed orbital lap, computer-controlled largetool can bend its lap surface timely to match the local sub-aperture, so it always strike the high area preferentially, due to its large diameter , computer-controlled large-tool possess highly remove efficiency and generate less middle-frequency and high-frequency errors comparing some small tools such as computer controlled optical surface (CCOS), but on the other hand how to calculate the dwell time for those computer-controlled large-tool becomes a challenge comparing those small tools. Based on the mathematical removal equation for computer controlled active lap we have none negative least square algorithm to calculate the dwell time, after the simulation, a optimized algorithm based on none negative least square is provided, the dwell time calculated by this optimized algorithm meet the wanted removal volume with little residual errors.

  6. 29 CFR 1614.604 - Filing and computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 4 2010-07-01 2010-07-01 false Filing and computation of time. 1614.604 Section 1614.604 Labor Regulations Relating to Labor (Continued) EQUAL EMPLOYMENT OPPORTUNITY COMMISSION FEDERAL SECTOR EQUAL EMPLOYMENT OPPORTUNITY Matters of General Applicability § 1614.604 Filing and computation of...

  7. 5 CFR 1201.23 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 3 2010-01-01 2010-01-01 false Computation of time. 1201.23 Section 1201.23 Administrative Personnel MERIT SYSTEMS PROTECTION BOARD ORGANIZATION AND PROCEDURES PRACTICES AND PROCEDURES Procedures for Appellate Cases Appeal of Agency Action; Pleadings § 1201.23 Computation of...

  8. 41 CFR 105-70.027 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 41 Public Contracts and Property Management 3 2011-01-01 2011-01-01 false Computation of time. 105-70.027 Section 105-70.027 Public Contracts and Property Management Federal Property Management... Administration 70-IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT OF 1986 § 105-70.027 Computation of...

  9. 41 CFR 105-70.027 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 41 Public Contracts and Property Management 3 2014-01-01 2014-01-01 false Computation of time. 105-70.027 Section 105-70.027 Public Contracts and Property Management Federal Property Management... Administration 70-IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT OF 1986 § 105-70.027 Computation of...

  10. 41 CFR 105-70.027 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 41 Public Contracts and Property Management 3 2012-01-01 2012-01-01 false Computation of time. 105-70.027 Section 105-70.027 Public Contracts and Property Management Federal Property Management... Administration 70-IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT OF 1986 § 105-70.027 Computation of...

  11. 41 CFR 105-70.027 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 41 Public Contracts and Property Management 3 2013-07-01 2013-07-01 false Computation of time. 105-70.027 Section 105-70.027 Public Contracts and Property Management Federal Property Management... Administration 70-IMPLEMENTATION OF THE PROGRAM FRAUD CIVIL REMEDIES ACT OF 1986 § 105-70.027 Computation of...

  12. 14 CFR 17.7 - Filing and computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Filing and computation of time. 17.7 Section 17.7 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES PROCEDURES FOR PROTESTS AND CONTRACT DISPUTES General § 17.7 Filing and computation of...

  13. 10 CFR 590.105 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 4 2013-01-01 2013-01-01 false Computation of time. 590.105 Section 590.105 Energy DEPARTMENT OF ENERGY (CONTINUED) NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) ADMINISTRATIVE PROCEDURES WITH RESPECT TO THE IMPORT AND EXPORT OF NATURAL GAS General Provisions § 590.105 Computation of...

  14. 10 CFR 590.105 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 10 Energy 4 2012-01-01 2012-01-01 false Computation of time. 590.105 Section 590.105 Energy DEPARTMENT OF ENERGY (CONTINUED) NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) ADMINISTRATIVE PROCEDURES WITH RESPECT TO THE IMPORT AND EXPORT OF NATURAL GAS General Provisions § 590.105 Computation of...

  15. 10 CFR 590.105 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Computation of time. 590.105 Section 590.105 Energy DEPARTMENT OF ENERGY (CONTINUED) NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) ADMINISTRATIVE PROCEDURES WITH RESPECT TO THE IMPORT AND EXPORT OF NATURAL GAS General Provisions § 590.105 Computation of...

  16. 10 CFR 590.105 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 4 2011-01-01 2011-01-01 false Computation of time. 590.105 Section 590.105 Energy DEPARTMENT OF ENERGY (CONTINUED) NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) ADMINISTRATIVE PROCEDURES WITH RESPECT TO THE IMPORT AND EXPORT OF NATURAL GAS General Provisions § 590.105 Computation of...

  17. 10 CFR 590.105 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 10 Energy 4 2014-01-01 2014-01-01 false Computation of time. 590.105 Section 590.105 Energy DEPARTMENT OF ENERGY (CONTINUED) NATURAL GAS (ECONOMIC REGULATORY ADMINISTRATION) ADMINISTRATIVE PROCEDURES WITH RESPECT TO THE IMPORT AND EXPORT OF NATURAL GAS General Provisions § 590.105 Computation of...

  18. 14 CFR 302.507 - Computing time for filing complaints.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Computing time for filing complaints. 302.507 Section 302.507 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION... Proceedings With Respect to Rates, Fares and Charges for Foreign Air Transportation § 302.507 Computing...

  19. 14 CFR 17.7 - Filing and computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Filing and computation of time. 17.7 Section 17.7 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES PROCEDURES FOR PROTESTS AND CONTRACTS DISPUTES General § 17.7 Filing and computation of...

  20. 14 CFR 17.7 - Filing and computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Filing and computation of time. 17.7 Section 17.7 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES PROCEDURES FOR PROTESTS AND CONTRACTS DISPUTES General § 17.7 Filing and computation of...

  1. 14 CFR 302.507 - Computing time for filing complaints.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Computing time for filing complaints. 302.507 Section 302.507 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION... Proceedings With Respect to Rates, Fares and Charges for Foreign Air Transportation § 302.507 Computing...

  2. 14 CFR 17.7 - Filing and computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Filing and computation of time. 17.7 Section 17.7 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES PROCEDURES FOR PROTESTS AND CONTRACT DISPUTES General § 17.7 Filing and computation of...

  3. 40 CFR 96.307 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Ozone Season Trading Program General Provisions § 96.307 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin on the..., any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin before...

  4. 40 CFR 96.307 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Ozone Season Trading Program General Provisions § 96.307 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin on the..., any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin before...

  5. 40 CFR 96.307 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Ozone Season Trading Program General Provisions § 96.307 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin on the..., any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin before...

  6. 40 CFR 96.307 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Ozone Season Trading Program General Provisions § 96.307 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin on the..., any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin before...

  7. 40 CFR 96.307 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Ozone Season Trading Program General Provisions § 96.307 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin on the..., any time period scheduled, under the CAIR NOX Ozone Season Trading Program, to begin before...

  8. 40 CFR 60.4107 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Electric Steam Generating Units Hg Budget Trading Program General Provisions § 60.4107 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the Hg Budget Trading Program, to begin... otherwise stated, any time period scheduled, under the Hg Budget Trading Program, to begin before...

  9. 40 CFR 97.607 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR SO2 Group 1 Trading Program § 97.607 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR SO2... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR SO2 Group 1...

  10. 40 CFR 97.607 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR SO2 Group 1 Trading Program § 97.607 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR SO2... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR SO2 Group 1...

  11. 40 CFR 97.607 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR SO2 Group 1 Trading Program § 97.607 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR SO2... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR SO2 Group 1...

  12. 40 CFR 97.507 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Ozone Season Trading Program § 97.507 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR... the act or event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR...

  13. 40 CFR 97.407 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Annual Trading Program § 97.407 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR NOX... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR NOX Annual...

  14. 40 CFR 97.407 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Annual Trading Program § 97.407 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR NOX... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR NOX Annual...

  15. 40 CFR 97.407 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Annual Trading Program § 97.407 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR NOX... event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR NOX Annual...

  16. 40 CFR 97.507 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Ozone Season Trading Program § 97.507 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR... the act or event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR...

  17. 40 CFR 97.507 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) FEDERAL NOX BUDGET TRADING PROGRAM AND CAIR NOX AND SO2 TRADING PROGRAMS TR NOX Ozone Season Trading Program § 97.507 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the TR... the act or event occurs. (b) Unless otherwise stated, any time period scheduled, under the TR...

  18. 14 CFR 13.212 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Computation of time. 13.212 Section 13.212 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES... time. (a) This section applies to any period of time prescribed or allowed by this subpart, by...

  19. 14 CFR 13.212 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Computation of time. 13.212 Section 13.212 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES... time. (a) This section applies to any period of time prescribed or allowed by this subpart, by...

  20. 49 CFR 1104.7 - Computation and extension of time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... time, the day of the act, event, or default upon which the designated period of time begins to run is... 49 Transportation 8 2010-10-01 2010-10-01 false Computation and extension of time. 1104.7 Section... BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE FILING WITH THE...

  1. 49 CFR 1104.7 - Computation and extension of time.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... time, the day of the act, event, or default upon which the designated period of time begins to run is... 49 Transportation 8 2012-10-01 2012-10-01 false Computation and extension of time. 1104.7 Section... BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE FILING WITH THE...

  2. 49 CFR 1104.7 - Computation and extension of time.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... time, the day of the act, event, or default upon which the designated period of time begins to run is... 49 Transportation 8 2013-10-01 2013-10-01 false Computation and extension of time. 1104.7 Section... BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE FILING WITH THE...

  3. 49 CFR 1104.7 - Computation and extension of time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... time, the day of the act, event, or default upon which the designated period of time begins to run is... 49 Transportation 8 2014-10-01 2014-10-01 false Computation and extension of time. 1104.7 Section... BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE FILING WITH THE...

  4. 49 CFR 1104.7 - Computation and extension of time.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... time, the day of the act, event, or default upon which the designated period of time begins to run is... 49 Transportation 8 2011-10-01 2011-10-01 false Computation and extension of time. 1104.7 Section... BOARD, DEPARTMENT OF TRANSPORTATION RULES OF PRACTICE FILING WITH THE...

  5. 14 CFR 13.212 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Computation of time. 13.212 Section 13.212 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES... time. (a) This section applies to any period of time prescribed or allowed by this subpart, by...

  6. 14 CFR 13.212 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Computation of time. 13.212 Section 13.212 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES... time. (a) This section applies to any period of time prescribed or allowed by this subpart, by...

  7. 19 CFR 201.14 - Computation of time, additional hearings, postponements, continuances, and extensions of time.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 3 2010-04-01 2010-04-01 false Computation of time, additional hearings, postponements, continuances, and extensions of time. 201.14 Section 201.14 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION GENERAL RULES OF GENERAL APPLICATION Initiation and Conduct of Investigations § 201.14 Computation of time,...

  8. Computing LORAN time differences with an HP-25 hand calculator

    NASA Technical Reports Server (NTRS)

    Jones, E. D.

    1978-01-01

    A program for an HP-25 or HP-25C hand calculator that will calculate accurate LORAN-C time differences is described and presented. The program is most useful when checking the accuracy of a LORAN-C receiver at a known latitude and longitude without the aid of an expensive computer. It can thus be used to compute time differences for known landmarks or waypoints to predict in advance the approximate readings during a navigation mission.

  9. CPU timing routines for a CONVEX C220 computer system

    NASA Technical Reports Server (NTRS)

    Bynum, Mary Ann

    1989-01-01

    The timing routines available on the CONVEX C220 computer system in the Structural Mechanics Division (SMD) at NASA Langley Research Center are examined. The function of the timing routines, the use of the timing routines in sequential, parallel, and vector code, and the interpretation of the results from the timing routines with respect to the CONVEX model of computing are described. The timing routines available on the SMD CONVEX fall into two groups. The first group includes standard timing routines generally available with UNIX 4.3 BSD operating systems, while the second group includes routines unique to the SMD CONVEX. The standard timing routines described in this report are /bin/csh time,/bin/time, etime, and ctime. The routines unique to the SMD CONVEX are getinfo, second, cputime, toc, and a parallel profiling package made up of palprof, palinit, and palsum.

  10. Data Acceptance Criteria for Standardized Human-Associated Fecal Source Identification Quantitative Real-Time PCR Methods.

    PubMed

    Shanks, Orin C; Kelty, Catherine A; Oshiro, Robin; Haugland, Richard A; Madi, Tania; Brooks, Lauren; Field, Katharine G; Sivaganesan, Mano

    2016-05-01

    There is growing interest in the application of human-associated fecal source identification quantitative real-time PCR (qPCR) technologies for water quality management. The transition from a research tool to a standardized protocol requires a high degree of confidence in data quality across laboratories. Data quality is typically determined through a series of specifications that ensure good experimental practice and the absence of bias in the results due to DNA isolation and amplification interferences. However, there is currently a lack of consensus on how best to evaluate and interpret human fecal source identification qPCR experiments. This is, in part, due to the lack of standardized protocols and information on interlaboratory variability under conditions for data acceptance. The aim of this study is to provide users and reviewers with a complete series of conditions for data acceptance derived from a multiple laboratory data set using standardized procedures. To establish these benchmarks, data from HF183/BacR287 and HumM2 human-associated qPCR methods were generated across 14 laboratories. Each laboratory followed a standardized protocol utilizing the same lot of reference DNA materials, DNA isolation kits, amplification reagents, and test samples to generate comparable data. After removal of outliers, a nested analysis of variance (ANOVA) was used to establish proficiency metrics that include lab-to-lab, replicate testing within a lab, and random error for amplification inhibition and sample processing controls. Other data acceptance measurements included extraneous DNA contamination assessments (no-template and extraction blank controls) and calibration model performance (correlation coefficient, amplification efficiency, and lower limit of quantification). To demonstrate the implementation of the proposed standardized protocols and data acceptance criteria, comparable data from two additional laboratories were reviewed. The data acceptance criteria

  11. GPU and APU computations of Finite Time Lyapunov Exponent fields

    NASA Astrophysics Data System (ADS)

    Conti, Christian; Rossinelli, Diego; Koumoutsakos, Petros

    2012-03-01

    We present GPU and APU accelerated computations of Finite-Time Lyapunov Exponent (FTLE) fields. The calculation of FTLEs is a computationally intensive process, as in order to obtain the sharp ridges associated with the Lagrangian Coherent Structures an extensive resampling of the flow field is required. The computational performance of this resampling is limited by the memory bandwidth of the underlying computer architecture. The present technique harnesses data-parallel execution of many-core architectures and relies on fast and accurate evaluations of moment conserving functions for the mesh to particle interpolations. We demonstrate how the computation of FTLEs can be efficiently performed on a GPU and on an APU through OpenCL and we report over one order of magnitude improvements over multi-threaded executions in FTLE computations of bluff body flows.

  12. Continuous-time symmetric Hopfield nets are computationally universal.

    PubMed

    Síma, Jirí; Orponen, Pekka

    2003-03-01

    We establish a fundamental result in the theory of computation by continuous-time dynamical systems by showing that systems corresponding to so-called continuous-time symmetric Hopfield nets are capable of general computation. As is well known, such networks have very constrained Lyapunov-function controlled dynamics. Nevertheless, we show that they are universal and efficient computational devices, in the sense that any convergent synchronous fully parallel computation by a recurrent network of n discrete-time binary neurons, with in general asymmetric coupling weights, can be simulated by a symmetric continuous-time Hopfield net containing only 18n + 7 units employing the saturated-linear activation function. Moreover, if the asymmetric network has maximum integer weight size w(max) and converges in discrete time t*, then the corresponding Hopfield net can be designed to operate in continuous time Theta(t*/epsilon) for any epsilon > 0 such that w(max)2(12n) computation models, our result implies that any polynomially space-bounded Turing machine can be simulated by a family of polynomial-size continuous-time symmetric Hopfield nets. PMID:12620163

  13. The Effects of a Computer-Assisted Instruction Program on Peer Acceptance, Teacher Acceptance, and Self-Concept of Mildly Handicapped Students.

    ERIC Educational Resources Information Center

    Leles, Sam; Culliver, Concetta C.

    A study was undertaken to determine the effects of a computer-assisted instruction (CAI) program on the self-concept of mainstreamed, mildly handicapped fifth-grade students (labeled learning disabled, emotionally conflicted, and educable mentally retarded) attending 13 different elementary schools in Tuscaloosa County, Alabama. A control group…

  14. Research plan for establishing the effects of time varying noise exposures on community annoyance and acceptability

    NASA Technical Reports Server (NTRS)

    Borsky, P. N.

    1980-01-01

    The design of a community noise survey to determine the effects of time varying noise exposures in residential communities is presented. Complex physical and human variables involved in the health and welfare effects of environmental noise and the number-level tradeoffs and time of day penalties are among the factors considered. Emphasis is placed on community reactions where noise exposures are equal in day or evening but differ in the night time, and the effects of ambient noise on more intense aircraft noise exposures. Thirteen different times of day and types of operation situations with exposed populations up to 8-10 miles from the airport are identified. A detailed personal interview questionnaire as well as specific instructions to interviewers are included.

  15. 40 CFR 72.11 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...) PERMITS REGULATION Acid Rain Program General Provisions § 72.11 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the Acid Rain Program, to begin on the occurrence of an act or... scheduled, under the Acid Rain Program, to begin before the occurrence of an act or event shall be...

  16. 40 CFR 72.11 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...) PERMITS REGULATION Acid Rain Program General Provisions § 72.11 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the Acid Rain Program, to begin on the occurrence of an act or... scheduled, under the Acid Rain Program, to begin before the occurrence of an act or event shall be...

  17. 40 CFR 72.11 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...) PERMITS REGULATION Acid Rain Program General Provisions § 72.11 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the Acid Rain Program, to begin on the occurrence of an act or... scheduled, under the Acid Rain Program, to begin before the occurrence of an act or event shall be...

  18. 40 CFR 72.11 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...) PERMITS REGULATION Acid Rain Program General Provisions § 72.11 Computation of time. (a) Unless otherwise stated, any time period scheduled, under the Acid Rain Program, to begin on the occurrence of an act or... scheduled, under the Acid Rain Program, to begin before the occurrence of an act or event shall be...

  19. 28 CFR 32.2 - Computation of time; filing.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... any period of time prescribed or allowed, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall... done is a filing with the PSOB Office, a day on which weather or other conditions have caused...

  20. 20 CFR 498.212 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Computation of time. 498.212 Section 498.212 Employees' Benefits SOCIAL SECURITY ADMINISTRATION CIVIL MONETARY PENALTIES, ASSESSMENTS AND RECOMMENDED... Government, in which event it includes the next business day. (b) When the period of time allowed is...

  1. Relationship of Scores and Times of Test Administration via Computer.

    ERIC Educational Resources Information Center

    Gorney, Barbara; Maury, Marcia

    The purpose of this study was to determine if a relationship exists between scores and the times that medical students choose to take a computer-administered test. The results indicate that students who choose to take a test later within a given time period tend to perform less well than students who take the test earlier. Although the magnitude…

  2. Acceptance of direct physician access to a computer-based patient record in a managed care setting.

    PubMed

    Dewey, J B; Manning, P; Brandt, S

    1993-01-01

    Kaiser Permanente Mid-Atlantic States has developed a fully integrated outpatient information system which currently runs on an IBM ES9000 on a VM platform written in MUMPS. The applications include Lab, Radiology, Transcription, Appointments. Pharmacy, Encounter tracking, Hospitalizations, Referrals, Phone Advice, Pap tracking, Problem list, Immunization tracking, and Patient demographics. They are department specific and require input and output from a dumb terminal. We have developed a physician's work station to access this information using PC compatible computers running Microsoft Windows and a custom Microsoft Visual Basic 2.0 environment which draws from these 14 applications giving the physician a comprehensive view of all electronic medical records. Through rapid prototyping, voluntary participation, formal training and gradual implementation we have created an enthusiastic response. 95% of our physician PC users access the system each month. The use ranges from 0.2 to 3.0 screens of data viewed per patient visit. This response continues to drive the process toward still greater user acceptance and further practice enhancement. PMID:8130585

  3. TimeSet: A computer program that accesses five atomic time services on two continents

    NASA Technical Reports Server (NTRS)

    Petrakis, P. L.

    1993-01-01

    TimeSet is a shareware program for accessing digital time services by telephone. At its initial release, it was capable of capturing time signals only from the U.S. Naval Observatory to set a computer's clock. Later the ability to synchronize with the National Institute of Standards and Technology was added. Now, in Version 7.10, TimeSet is able to access three additional telephone time services in Europe - in Sweden, Austria, and Italy - making a total of five official services addressable by the program. A companion program, TimeGen, allows yet another source of telephone time data strings for callers equipped with TimeSet version 7.10. TimeGen synthesizes UTC time data strings in the Naval Observatory's format from an accurately set and maintained DOS computer clock, and transmits them to callers. This allows an unlimited number of 'freelance' time generating stations to be created. Timesetting from TimeGen is made feasible by the advent of Becker's RighTime, a shareware program that learns the drift characteristics of a computer's clock and continuously applies a correction to keep it accurate, and also brings .01 second resolution to the DOS clock. With clock regulation by RighTime and periodic update calls by the TimeGen station to an official time source via TimeSet, TimeGen offers the same degree of accuracy within the resolution of the computer clock as any official atomic time source.

  4. An Eulerian approach for computing the finite time Lyapunov exponent

    NASA Astrophysics Data System (ADS)

    Leung, Shingyu

    2011-05-01

    We propose efficient Eulerian methods for approximating the finite-time Lyapunov exponent (FTLE). The idea is to compute the related flow map using the Level Set Method and the Liouville equation. There are several advantages of the proposed approach. Unlike the usual Lagrangian-type computations, the resulting method requires the velocity field defined only at discrete locations. No interpolation of the velocity field is needed. Also, the method automatically stops a particle trajectory in the case when the ray hits the boundary of the computational domain. The computational complexity of the algorithm is O(Δ x-( d+1) ) with d the dimension of the physical space. Since there are the same number of mesh points in the x- t space, the computational complexity of the proposed Eulerian approach is optimal in the sense that each grid point is visited for only O(1) time. We also extend the algorithm to compute the FTLE on a co-dimension one manifold. The resulting algorithm does not require computation on any local coordinate system and is simple to implement even for an evolving manifold.

  5. The design of a scalable, fixed-time computer benchmark

    SciTech Connect

    Gustafson, J.; Rover, D.; Elbert, S.; Carter, M.

    1990-10-01

    By using the principle of fixed time benchmarking, it is possible to compare a very wide range of computers, from a small personal computer to the most powerful parallel supercomputer, an a single scale. Fixed-time benchmarks promise far greater longevity than those based on a particular problem size, and are more appropriate for grand challenge'' capability comparison. We present the design of a benchmark, SLALOM{trademark}, that scales automatically to the computing power available, and corrects several deficiencies in various existing benchmarks: it is highly scalable, it solves a real problem, it includes input and output times, and it can be run on parallel machines of all kinds, using any convenient language. The benchmark provides a reasonable estimate of the size of problem solvable on scientific computers. Results are presented that span six orders of magnitude for contemporary computers of various architectures. The benchmarks also can be used to demonstrate a new source of superlinear speedup in parallel computers. 15 refs., 14 figs., 3 tabs.

  6. Computational methods to obtain time optimal jet engine control

    NASA Technical Reports Server (NTRS)

    Basso, R. J.; Leake, R. J.

    1976-01-01

    Dynamic Programming and the Fletcher-Reeves Conjugate Gradient Method are two existing methods which can be applied to solve a general class of unconstrained fixed time, free right end optimal control problems. New techniques are developed to adapt these methods to solve a time optimal control problem with state variable and control constraints. Specifically, they are applied to compute a time optimal control for a jet engine control problem.

  7. Heterogeneous real-time computing in radio astronomy

    NASA Astrophysics Data System (ADS)

    Ford, John M.; Demorest, Paul; Ransom, Scott

    2010-07-01

    Modern computer architectures suited for general purpose computing are often not the best choice for either I/O-bound or compute-bound problems. Sometimes the best choice is not to choose a single architecture, but to take advantage of the best characteristics of different computer architectures to solve your problems. This paper examines the tradeoffs between using computer systems based on the ubiquitous X86 Central Processing Units (CPU's), Field Programmable Gate Array (FPGA) based signal processors, and Graphical Processing Units (GPU's). We will show how a heterogeneous system can be produced that blends the best of each of these technologies into a real-time signal processing system. FPGA's tightly coupled to analog-to-digital converters connect the instrument to the telescope and supply the first level of computing to the system. These FPGA's are coupled to other FPGA's to continue to provide highly efficient processing power. Data is then packaged up and shipped over fast networks to a cluster of general purpose computers equipped with GPU's, which are used for floating-point intensive computation. Finally, the data is handled by the CPU and written to disk, or further processed. Each of the elements in the system has been chosen for its specific characteristics and the role it can play in creating a system that does the most for the least, in terms of power, space, and money.

  8. Time-Shared Computing Implications for Medical Libraries *

    PubMed Central

    Austin, Charles J.

    1969-01-01

    Many library data processing systems are unresponsive to the needs of librarians because of the necessity to batch-process transactions in a computer center. Such systems tend to be reportoriented rather than information-oriented with resultant problems in the timeliness of information. Time-shared computing permits multiple users to process jobs simultaneously through on-line interaction with the computer. Such systems offer to the librarian the advantages of immediate access to information, costs shared with other users, and direct man-machine interaction. This tutorial paper describes time-shared systems with applications in the library. Problems concerning the cost and present state-of-the-art of time-sharing are discussed. PMID:5778721

  9. Approximate computing for complexity reduction in timing synchronization

    NASA Astrophysics Data System (ADS)

    Airoldi, Roberto; Campi, Fabio; Nurmi, Jari

    2014-12-01

    This paper presents the design and performance evaluation of a reduced complexity algorithm for timing synchronization. The complexity reduction is obtained via the introduction of approximate computing, which lightens the computational load of the algorithm with a minimal loss in precision. Timing synchronization for wideband-code division multiple access (W-CDMA) systems is utilized as the case study and experimental results show that the proposed approach is able to deliver performance similar to traditional approaches. At the same time, the proposed algorithm is able to cut the computational complexity of the traditional algorithm by a 20% factor. Furthermore, the estimation of power consumption on a reference architecture, showed that a 20% complexity reduction, corresponds to a total power saving of 45%.

  10. Processing system for real-time holographic video computation

    NASA Astrophysics Data System (ADS)

    Nwodoh, Thomas A.; Bove, V. Michael, Jr.; Watlington, John A.; Benton, Stephen A.

    1999-08-01

    This paper discusses the Chidi holographic video processing system (called Holo-Chidi) used for real-time computation of computer generated holograms and the subsequent display of the holograms at video frame rates. Chidi is a reconfigurable multimedia processing system designed at the MIT Media Laboratory for real-time synthesis and analysis of multimedia data in general and digital video frames in particular. Holo-Chidi which is an adaptation of Chidi, comprises two main components: the sets of processor cards and the display interface cards.

  11. Evaluation of the Acceptability and Feasibility of a Computer-Tailored Intervention to Increase Human Papillomavirus Vaccination among Young Adult Women

    ERIC Educational Resources Information Center

    Paiva, Andrea L.; Lipschitz, Jessica M.; Fernandez, Anne C.; Redding, Colleen A.; Prochaska, James O.

    2014-01-01

    Objective: To examine acceptability and feasibility of a Transtheoretical Model (TTM)-based computer-tailored intervention (CTI) for increasing human papillomavirus (HPV) vaccination in college-aged women. Participants: Two hundred forty-three women aged 18-26 were recruited between February and May of 2011. Methods: Participants completed the…

  12. Fast computation of recurrences in long time series

    NASA Astrophysics Data System (ADS)

    Rawald, Tobias; Sips, Mike; Marwan, Norbert; Dransch, Doris

    2014-05-01

    The quadratic time complexity of calculating basic RQA measures, doubling the size of the input time series leads to a quadrupling in operations, impairs the fast computation of RQA in many application scenarios. As an example, we analyze the Potsdamer Reihe, an ongoing non-interrupted hourly temperature profile since 1893, consisting of 1,043,112 data points. Using an optimized single-threaded CPU implementation this analysis requires about six hours. Our approach conducts RQA for the Potsdamer Reihe in five minutes. We automatically split a long time series into smaller chunks (Divide) and distribute the computation of RQA measures across multiple GPU devices. To guarantee valid RQA results, we employ carryover buffers that allow sharing information between pairs of chunks (Recombine). We demonstrate the capabilities of our Divide and Recombine approach to process long time series by comparing the runtime of our implementation to existing RQA tools. We support a variety of platforms by employing the computing framework OpenCL. Our current implementation supports the computation of standard RQA measures (recurrence rate, determinism, laminarity, ratio, average diagonal line length, trapping time, longest diagonal line, longest vertical line, divergence, entropy, trend) and also calculates recurrence times. To utilize the potential of our approach for a number of applications, we plan to release our implementation under an Open Source software license. It will be available at http://www.gfz-potsdam.de/fast-rqa/. Since our approach allows to compute RQA measures for a long time series fast, we plan to extend our implementation to support multi-scale RQA.

  13. A new computational structure for real-time dynamics

    SciTech Connect

    Izaguirre, A. ); Hashimoto, Minoru )

    1992-08-01

    The authors present an efficient structure for the computation of robot dynamics in real time. The fundamental characteristic of this structure is the division of the computation into a high-priority synchronous task and low-priority background tasks, possibly sharing the resources of a conventional computing unit based on commercial microprocessors. The background tasks compute the inertial and gravitational coefficients as well as the forces due to the velocities of the joints. In each control sample period, the high-priority synchronous task computes the product of the inertial coefficients by the accelerations of the joints and performs the summation of the torques due to the velocities and gravitational forces. Kircanski et al. (1986) have shown that the bandwidth of the variation of joint angles and of their velocities is an order of magnitude less than the variation of joint accelerations. This result agrees with the experiments the authors have carried out using a PUMA 260 robot. Two main strategies contribute to reduce the computational burden associated with the evaluation of the dynamic equations. The first involves the use of efficient algorithms for the evaluation of the equations. The second is aimed at reducing the number of dynamic parameters by identifying beforehand the linear dependencies among these parameters, as well as carrying out a significance analysis of the parameters' contribution to the final joint torques. The actual code used to evaluate this dynamic model is entirely computer generated from experimental data, requiring no other manual intervention than performing a campaign of measurements.

  14. Imprecise results: Utilizing partial computations in real-time systems

    NASA Technical Reports Server (NTRS)

    Lin, Kwei-Jay; Natarajan, Swaminathan; Liu, Jane W.-S.

    1987-01-01

    In real-time systems, a computation may not have time to complete its execution because of deadline requirements. In such cases, no result except the approximate results produced by the computations up to that point will be available. It is desirable to utilize these imprecise results if possible. Two approaches are proposed to enable computations to return imprecise results when executions cannot be completed normally. The milestone approach records results periodically, and if a deadline is reached, returns the last recorded result. The sieve approach demarcates sections of code which can be skipped if the time available is insufficient. By using these approaches, the system is able to produce imprecise results when deadlines are reached. The design of the Concord project is described which supports imprecise computations using these techniques. Also presented is a general model of imprecise computations using these techniques, as well as one which takes into account the influence of the environment, showing where the latter approach fits into this model.

  15. The computational foundations of time dependent density functional theory

    NASA Astrophysics Data System (ADS)

    Whitfield, James

    2014-03-01

    The mathematical foundations of TDDFT are established through the formal existence of a fictitious non-interacting system (known as the Kohn-Sham system), which can reproduce the one-electron reduced probability density of the actual system. We build upon these works and show that on the interior of the domain of existence, the Kohn-Sham system can be efficiently obtained given the time-dependent density. Since a quantum computer can efficiently produce such time-dependent densities, we present a polynomial time quantum algorithm to generate the time-dependent Kohn-Sham potential with controllable error bounds. Further, we find that systems do not immediately become non-representable but rather become ill-representable as one approaches this boundary. A representability parameter is defined in our work which quantifies the distance to the boundary of representability and the computational difficulty of finding the Kohn-Sham system.

  16. GPS computer navigators to shorten EMS response and transport times.

    PubMed

    Ota, F S; Muramatsu, R S; Yoshida, B H; Yamamoto, L G

    2001-05-01

    GPS (global positioning satellite system to determine one's position on earth) units have become inexpensive and compact. The purpose of this study is to assess the effectiveness of a GPS enhanced computer street map navigator to improve the ability of EMS drivers in an urban setting to locate their destination and shorten response times. For part I, residential addresses in the city were randomly selected from a telephone directory. Two driver/navigator teams were assigned to drive to the address adhering to speed limits. One team used a standard street map, whereas the other team used a GPS computer navigator. The travel time and distance of the runs were compared. For part II, the computer GPS navigator was placed on an ambulance to supplement their normal methods of navigation to find the address requesting EMS. After the run was completed, EMS providers were interviewed to determine their opinion of whether the GPS navigator was helpful. For part I the results showed that in the 29 initial test runs, comparing the GPS team versus the standard map team, the mean distances traveled were 8.7 versus 9.0 kilometers (not significant) and the mean travel times were 13.5 versus 14.6 minutes (P=.02), respectively. The GPS team arrived faster in 72% runs. For part II the results showed that most EMS providers surveyed noted that the GPS computer navigator enhanced their ability to find the destination and all EMS providers acknowledged that it would enhance their ability to find a destination in an area in which they were unfamiliar. These results suggest that a portable GPS computer navigator system is helpful and can enhance the ability of prehospital care providers to locate their destination. Because these units are accurate and inexpensive, GPS computer navigators may be a valuable tool in reducing pre-hospital transport times. PMID:11326345

  17. A statistical package for computing time and frequency domain analysis

    NASA Technical Reports Server (NTRS)

    Brownlow, J.

    1978-01-01

    The spectrum analysis (SPA) program is a general purpose digital computer program designed to aid in data analysis. The program does time and frequency domain statistical analyses as well as some preanalysis data preparation. The capabilities of the SPA program include linear trend removal and/or digital filtering of data, plotting and/or listing of both filtered and unfiltered data, time domain statistical characterization of data, and frequency domain statistical characterization of data.

  18. 5 CFR 1201.23 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 5 Administrative Personnel 3 2013-01-01 2013-01-01 false Computation of time. 1201.23 Section 1201.23 Administrative Personnel MERIT SYSTEMS PROTECTION BOARD ORGANIZATION AND PROCEDURES PRACTICES AND... first workday after that date. Unless a different deadline is specified by the Board or its designee,...

  19. Time Advice and Learning Questions in Computer Simulations

    ERIC Educational Resources Information Center

    Rey, Gunter Daniel

    2011-01-01

    Students (N = 101) used an introductory text and a computer simulation to learn fundamental concepts about statistical analyses (e.g., analysis of variance, regression analysis and General Linear Model). Each learner was randomly assigned to one cell of a 2 (with or without time advice) x 3 (with learning questions and corrective feedback, with…

  20. 50 CFR 221.3 - How are time periods computed?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 50 Wildlife and Fisheries 7 2010-10-01 2010-10-01 false How are time periods computed? 221.3 Section 221.3 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS PRESCRIPTIONS IN FERC HYDROPOWER LICENSES...

  1. 50 CFR 221.3 - How are time periods computed?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 50 Wildlife and Fisheries 9 2011-10-01 2011-10-01 false How are time periods computed? 221.3 Section 221.3 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS PRESCRIPTIONS IN FERC HYDROPOWER LICENSES...

  2. 50 CFR 221.3 - How are time periods computed?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 50 Wildlife and Fisheries 10 2013-10-01 2013-10-01 false How are time periods computed? 221.3 Section 221.3 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS PRESCRIPTIONS IN FERC HYDROPOWER LICENSES...

  3. 50 CFR 221.3 - How are time periods computed?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 50 Wildlife and Fisheries 10 2014-10-01 2014-10-01 false How are time periods computed? 221.3 Section 221.3 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS PRESCRIPTIONS IN FERC HYDROPOWER LICENSES...

  4. 50 CFR 221.3 - How are time periods computed?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 50 Wildlife and Fisheries 10 2012-10-01 2012-10-01 false How are time periods computed? 221.3 Section 221.3 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS PRESCRIPTIONS IN FERC HYDROPOWER LICENSES...

  5. 5 CFR 847.108 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Computation of time. 847.108 Section 847.108 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT (CONTINUED) CIVIL SERVICE REGULATIONS (CONTINUED) ELECTIONS OF RETIREMENT COVERAGE BY CURRENT AND FORMER EMPLOYEES OF NONAPPROPRIATED FUND INSTRUMENTALITIES General Provisions §...

  6. 5 CFR 1201.23 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 5 Administrative Personnel 3 2014-01-01 2014-01-01 false Computation of time. 1201.23 Section 1201.23 Administrative Personnel MERIT SYSTEMS PROTECTION BOARD ORGANIZATION AND PROCEDURES PRACTICES AND... first workday after that date. Unless a different deadline is specified by the Board or its designee,...

  7. 11 CFR 111.2 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ..., Thanksgiving Day, Christmas Day, and any other day appointed as a holiday for employees of the United States by... allowed by this part, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless...

  8. 11 CFR 111.2 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ..., Thanksgiving Day, Christmas Day, and any other day appointed as a holiday for employees of the United States by... allowed by this part, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless...

  9. 11 CFR 111.2 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ..., Thanksgiving Day, Christmas Day, and any other day appointed as a holiday for employees of the United States by... this part, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless it is a...

  10. 42 CFR 93.509 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 1 2014-10-01 2014-10-01 false Computation of time. 93.509 Section 93.509 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES HEALTH ASSESSMENTS AND HEALTH EFFECTS STUDIES OF HAZARDOUS SUBSTANCES RELEASES AND FACILITIES PUBLIC HEALTH SERVICE POLICIES ON RESEARCH MISCONDUCT Opportunity To Contest...

  11. Instructional Advice, Time Advice and Learning Questions in Computer Simulations

    ERIC Educational Resources Information Center

    Rey, Gunter Daniel

    2010-01-01

    Undergraduate students (N = 97) used an introductory text and a computer simulation to learn fundamental concepts about statistical analyses (e.g., analysis of variance, regression analysis and General Linear Model). Each learner was randomly assigned to one cell of a 2 (with or without instructional advice) x 2 (with or without time advice) x 2…

  12. 43 CFR 4.803 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Computation of time. 4.803 Section 4.803 Public Lands: Interior Office of the Secretary of the Interior DEPARTMENT HEARINGS AND APPEALS PROCEDURES Special Procedural Rules Applicable to Practice and Procedure for Hearings, Decisions, and...

  13. Voice reaction times with recognition for Commodore computers

    NASA Technical Reports Server (NTRS)

    Washburn, David A.; Putney, R. Thompson

    1990-01-01

    Hardware and software modifications are presented that allow for collection and recognition by a Commodore computer of spoken responses. Responses are timed with millisecond accuracy and automatically analyzed and scored. Accuracy data for this device from several experiments are presented. Potential applications and suggestions for improving recognition accuracy are also discussed.

  14. 11 CFR 111.2 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ..., Thanksgiving Day, Christmas Day, and any other day appointed as a holiday for employees of the United States by... allowed by this part, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless...

  15. 29 CFR 801.59 - Service and computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 3 2010-07-01 2010-07-01 false Service and computation of time. 801.59 Section 801.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR OTHER LAWS APPLICATION OF THE EMPLOYEE POLYGRAPH PROTECTION ACT OF 1988 Administrative Proceedings Rules of...

  16. 29 CFR 801.59 - Service and computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 3 2014-07-01 2014-07-01 false Service and computation of time. 801.59 Section 801.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR OTHER LAWS APPLICATION OF THE EMPLOYEE POLYGRAPH PROTECTION ACT OF 1988 Administrative Proceedings Rules of...

  17. 29 CFR 801.59 - Service and computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 3 2011-07-01 2011-07-01 false Service and computation of time. 801.59 Section 801.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR OTHER LAWS APPLICATION OF THE EMPLOYEE POLYGRAPH PROTECTION ACT OF 1988 Administrative Proceedings Rules of...

  18. 29 CFR 801.59 - Service and computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 3 2013-07-01 2013-07-01 false Service and computation of time. 801.59 Section 801.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR OTHER LAWS APPLICATION OF THE EMPLOYEE POLYGRAPH PROTECTION ACT OF 1988 Administrative Proceedings Rules of...

  19. 29 CFR 801.59 - Service and computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 3 2012-07-01 2012-07-01 false Service and computation of time. 801.59 Section 801.59 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR OTHER LAWS APPLICATION OF THE EMPLOYEE POLYGRAPH PROTECTION ACT OF 1988 Administrative Proceedings Rules of...

  20. 14 CFR 16.17 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 1 2012-01-01 2012-01-01 false Computation of time. 16.17 Section 16.17 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PROCEDURAL RULES RULES OF PRACTICE FOR FEDERALLY-ASSISTED AIRPORT ENFORCEMENT PROCEEDINGS General Rules Applicable to Complaints, Proceedings Initiated by the FAA,...

  1. The Time-Sharing Computer In Introductory Earth Science.

    ERIC Educational Resources Information Center

    MacDonald, William D.; MacDonald, Geraldine E.

    Time-sharing computer-assisted instructional (CAI) programs employing the APL language are being used in support of introductory earth science laboratory exercises at the State University of New York at Binghamton. Three examples are sufficient to illustrate the variety of applications to which these programs are put. The BRACH program is used in…

  2. Computational alternatives to obtain time optimal jet engine control. M.S. Thesis

    NASA Technical Reports Server (NTRS)

    Basso, R. J.; Leake, R. J.

    1976-01-01

    Two computational methods to determine an open loop time optimal control sequence for a simple single spool turbojet engine are described by a set of nonlinear differential equations. Both methods are modifications of widely accepted algorithms which can solve fixed time unconstrained optimal control problems with a free right end. Constrained problems to be considered have fixed right ends and free time. Dynamic programming is defined on a standard problem and it yields a successive approximation solution to the time optimal problem of interest. A feedback control law is obtained and it is then used to determine the corresponding open loop control sequence. The Fletcher-Reeves conjugate gradient method has been selected for adaptation to solve a nonlinear optimal control problem with state variable and control constraints.

  3. 29 CFR 4000.43 - How do I compute a time period?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false How do I compute a time period? 4000.43 Section 4000.43..., ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION Computation of Time § 4000.43 How do I compute a time period? (a) In general. If you are computing a time period to which this part applies, whether you...

  4. 29 CFR 4000.43 - How do I compute a time period?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 9 2011-07-01 2011-07-01 false How do I compute a time period? 4000.43 Section 4000.43..., ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION Computation of Time § 4000.43 How do I compute a time period? (a) In general. If you are computing a time period to which this part applies, whether you...

  5. 29 CFR 4000.43 - How do I compute a time period?

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 9 2012-07-01 2012-07-01 false How do I compute a time period? 4000.43 Section 4000.43..., ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION Computation of Time § 4000.43 How do I compute a time period? (a) In general. If you are computing a time period to which this part applies, whether you...

  6. 29 CFR 4000.43 - How do I compute a time period?

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 9 2014-07-01 2014-07-01 false How do I compute a time period? 4000.43 Section 4000.43..., ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION Computation of Time § 4000.43 How do I compute a time period? (a) In general. If you are computing a time period to which this part applies, whether you...

  7. 29 CFR 4000.43 - How do I compute a time period?

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 9 2013-07-01 2013-07-01 false How do I compute a time period? 4000.43 Section 4000.43..., ISSUANCE, COMPUTATION OF TIME, AND RECORD RETENTION Computation of Time § 4000.43 How do I compute a time period? (a) In general. If you are computing a time period to which this part applies, whether you...

  8. Is it time to act? The potential of acceptance and commitment therapy for psychological problems following acquired brain injury

    PubMed Central

    Kangas, Maria; McDonald, Skye

    2011-01-01

    Behaviour therapies have a well-established, useful tradition in psychological treatments and have undergone several major revisions. Acceptance and Commitment Therapy (ACT) and mindfulness-based approaches are considered a third wave of behavioural therapies. Emerging evidence for ACT has demonstrated that this paradigm has promising effectiveness in improving functionality and well-being in a variety of populations that have psychological disturbances and/or medical problems. In this review we first evaluate traditional cognitive behavioural therapy (CBT) interventions used to manage psychological problems in distressed individuals who have sustained an acquired brain injury (ABI). We provide an overview of the ACT paradigm and the existent evidence base for this intervention. A rationale is outlined for why ACT-based interventions may have potential utility in assisting distressed individuals who have sustained a mild to moderate ABI to move forward with their lives. We also review emerging evidence that lends preliminary support to the implementation of acceptance and mindfulness-based interventions in the rehabilitation of ABI patient groups. On the basis of existent literature, we recommend that it is an opportune time for forthcoming research to rigorously test the efficacy of ACT-based interventions in facilitating ABI patient groups to re-engage in living a valued and meaningful life, in spite of their neurocognitive and physical limitations. The promising utility of testing the efficacy of the ACT paradigm in the context of multimodal rehabilitation programmes for ABI populations is also addressed. PMID:21246445

  9. Computing Complex Visual Features with Retinal Spike Times

    PubMed Central

    Sompolinsky, Haim; Meister, Markus

    2013-01-01

    Neurons in sensory systems can represent information not only by their firing rate, but also by the precise timing of individual spikes. For example, certain retinal ganglion cells, first identified in the salamander, encode the spatial structure of a new image by their first-spike latencies. Here we explore how this temporal code can be used by downstream neural circuits for computing complex features of the image that are not available from the signals of individual ganglion cells. To this end, we feed the experimentally observed spike trains from a population of retinal ganglion cells to an integrate-and-fire model of post-synaptic integration. The synaptic weights of this integration are tuned according to the recently introduced tempotron learning rule. We find that this model neuron can perform complex visual detection tasks in a single synaptic stage that would require multiple stages for neurons operating instead on neural spike counts. Furthermore, the model computes rapidly, using only a single spike per afferent, and can signal its decision in turn by just a single spike. Extending these analyses to large ensembles of simulated retinal signals, we show that the model can detect the orientation of a visual pattern independent of its phase, an operation thought to be one of the primitives in early visual processing. We analyze how these computations work and compare the performance of this model to other schemes for reading out spike-timing information. These results demonstrate that the retina formats spatial information into temporal spike sequences in a way that favors computation in the time domain. Moreover, complex image analysis can be achieved already by a simple integrate-and-fire model neuron, emphasizing the power and plausibility of rapid neural computing with spike times. PMID:23301021

  10. Real-time Tsunami Inundation Prediction Using High Performance Computers

    NASA Astrophysics Data System (ADS)

    Oishi, Y.; Imamura, F.; Sugawara, D.

    2014-12-01

    Recently off-shore tsunami observation stations based on cabled ocean bottom pressure gauges are actively being deployed especially in Japan. These cabled systems are designed to provide real-time tsunami data before tsunamis reach coastlines for disaster mitigation purposes. To receive real benefits of these observations, real-time analysis techniques to make an effective use of these data are necessary. A representative study was made by Tsushima et al. (2009) that proposed a method to provide instant tsunami source prediction based on achieving tsunami waveform data. As time passes, the prediction is improved by using updated waveform data. After a tsunami source is predicted, tsunami waveforms are synthesized from pre-computed tsunami Green functions of linear long wave equations. Tsushima et al. (2014) updated the method by combining the tsunami waveform inversion with an instant inversion of coseismic crustal deformation and improved the prediction accuracy and speed in the early stages. For disaster mitigation purposes, real-time predictions of tsunami inundation are also important. In this study, we discuss the possibility of real-time tsunami inundation predictions, which require faster-than-real-time tsunami inundation simulation in addition to instant tsunami source analysis. Although the computational amount is large to solve non-linear shallow water equations for inundation predictions, it has become executable through the recent developments of high performance computing technologies. We conducted parallel computations of tsunami inundation and achieved 6.0 TFLOPS by using 19,000 CPU cores. We employed a leap-frog finite difference method with nested staggered grids of which resolution range from 405 m to 5 m. The resolution ratio of each nested domain was 1/3. Total number of grid points were 13 million, and the time step was 0.1 seconds. Tsunami sources of 2011 Tohoku-oki earthquake were tested. The inundation prediction up to 2 hours after the

  11. Soft Real-Time PID Control on a VME Computer

    NASA Technical Reports Server (NTRS)

    Karayan, Vahag; Sander, Stanley; Cageao, Richard

    2007-01-01

    microPID (uPID) is a computer program for real-time proportional + integral + derivative (PID) control of a translation stage in a Fourier-transform ultraviolet spectrometer. microPID implements a PID control loop over a position profile at sampling rate of 8 kHz (sampling period 125microseconds). The software runs in a strippeddown Linux operating system on a VersaModule Eurocard (VME) computer operating in real-time priority queue using an embedded controller, a 16-bit digital-to-analog converter (D/A) board, and a laser-positioning board (LPB). microPID consists of three main parts: (1) VME device-driver routines, (2) software that administers a custom protocol for serial communication with a control computer, and (3) a loop section that obtains the current position from an LPB-driver routine, calculates the ideal position from the profile, and calculates a new voltage command by use of an embedded PID routine all within each sampling period. The voltage command is sent to the D/A board to control the stage. microPID uses special kernel headers to obtain microsecond timing resolution. Inasmuch as microPID implements a single-threaded process and all other processes are disabled, the Linux operating system acts as a soft real-time system.

  12. Uniform-acceptance force-bias Monte Carlo method with time scale to study solid-state diffusion

    NASA Astrophysics Data System (ADS)

    Mees, Maarten J.; Pourtois, Geoffrey; Neyts, Erik C.; Thijsse, Barend J.; Stesmans, André

    2012-04-01

    Monte Carlo (MC) methods have a long-standing history as partners of molecular dynamics (MD) to simulate the evolution of materials at the atomic scale. Among these techniques, the uniform-acceptance force-bias Monte Carlo (UFMC) method [G. Dereli, Mol. Simul.10.1080/08927029208022490 8, 351 (1992)] has recently attracted attention [M. Timonova , Phys. Rev. BPRBMDO1098-012110.1103/PhysRevB.81.144107 81, 144107 (2010)] thanks to its apparent capacity of being able to simulate physical processes in a reduced number of iterations compared to classical MD methods. The origin of this efficiency remains, however, unclear. In this work we derive a UFMC method starting from basic thermodynamic principles, which leads to an intuitive and unambiguous formalism. The approach includes a statistically relevant time step per Monte Carlo iteration, showing a significant speed-up compared to MD simulations. This time-stamped force-bias Monte Carlo (tfMC) formalism is tested on both simple one-dimensional and three-dimensional systems. Both test-cases give excellent results in agreement with analytical solutions and literature reports. The inclusion of a time scale, the simplicity of the method, and the enhancement of the time step compared to classical MD methods make this method very appealing for studying the dynamics of many-particle systems.

  13. Sorting on STAR. [CDC computer algorithm timing comparison

    NASA Technical Reports Server (NTRS)

    Stone, H. S.

    1978-01-01

    Timing comparisons are given for three sorting algorithms written for the CDC STAR computer. One algorithm is Hoare's (1962) Quicksort, which is the fastest or nearly the fastest sorting algorithm for most computers. A second algorithm is a vector version of Quicksort that takes advantage of the STAR's vector operations. The third algorithm is an adaptation of Batcher's (1968) sorting algorithm, which makes especially good use of vector operations but has a complexity of N(log N)-squared as compared with a complexity of N log N for the Quicksort algorithms. In spite of its worse complexity, Batcher's sorting algorithm is competitive with the serial version of Quicksort for vectors up to the largest that can be treated by STAR. Vector Quicksort outperforms the other two algorithms and is generally preferred. These results indicate that unusual instruction sets can introduce biases in program execution time that counter results predicted by worst-case asymptotic complexity analysis.

  14. Space-time computation techniques with continuous representation in time (ST-C)

    NASA Astrophysics Data System (ADS)

    Takizawa, Kenji; Tezduyar, Tayfun E.

    2014-01-01

    We introduce space-time computation techniques with continuous representation in time (ST-C), using temporal NURBS basis functions. This gives us a temporally smooth, NURBS-based solution, which is desirable in some cases, and a more efficient way of dealing with the computed data. We propose two versions of ST-C. In the first version, the smooth solution is extracted by projection from a solution computed with a different temporal representation, typically a discontinuous one. We use a successive projection technique with a small number of temporal NURBS basis functions at each projection, and therefore the extraction can take place as the solution with discontinuous temporal representation is being computed, without storing a large amount of time-history data. This version is not limited to solutions computed with ST techniques. In the second version, the solution with continuous temporal representation is computed directly by using a small number of temporal NURBS basis functions in the variational formulation associated with each time step.

  15. Spike-Timing-Based Computation in Sound Localization

    PubMed Central

    Goodman, Dan F. M.; Brette, Romain

    2010-01-01

    Spike timing is precise in the auditory system and it has been argued that it conveys information about auditory stimuli, in particular about the location of a sound source. However, beyond simple time differences, the way in which neurons might extract this information is unclear and the potential computational advantages are unknown. The computational difficulty of this task for an animal is to locate the source of an unexpected sound from two monaural signals that are highly dependent on the unknown source signal. In neuron models consisting of spectro-temporal filtering and spiking nonlinearity, we found that the binaural structure induced by spatialized sounds is mapped to synchrony patterns that depend on source location rather than on source signal. Location-specific synchrony patterns would then result in the activation of location-specific assemblies of postsynaptic neurons. We designed a spiking neuron model which exploited this principle to locate a variety of sound sources in a virtual acoustic environment using measured human head-related transfer functions. The model was able to accurately estimate the location of previously unknown sounds in both azimuth and elevation (including front/back discrimination) in a known acoustic environment. We found that multiple representations of different acoustic environments could coexist as sets of overlapping neural assemblies which could be associated with spatial locations by Hebbian learning. The model demonstrates the computational relevance of relative spike timing to extract spatial information about sources independently of the source signal. PMID:21085681

  16. 19 CFR 210.6 - Computation of time, additional hearings, postponements, continuances, and extensions of time.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 3 2010-04-01 2010-04-01 false Computation of time, additional hearings, postponements, continuances, and extensions of time. 210.6 Section 210.6 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION INVESTIGATIONS OF UNFAIR PRACTICES IN IMPORT TRADE ADJUDICATION AND ENFORCEMENT Rules of General Applicability §...

  17. 14 CFR 221.190 - Time for filing and computation of time periods.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Time for filing and computation of time periods. 221.190 Section 221.190 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS TARIFFS Electronically Filed Tariffs § 221.190...

  18. 14 CFR 221.190 - Time for filing and computation of time periods.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 4 2011-01-01 2011-01-01 false Time for filing and computation of time periods. 221.190 Section 221.190 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS TARIFFS Electronically Filed Tariffs § 221.190...

  19. 14 CFR 221.190 - Time for filing and computation of time periods.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 4 2012-01-01 2012-01-01 false Time for filing and computation of time periods. 221.190 Section 221.190 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS TARIFFS Electronically Filed Tariffs § 221.190...

  20. 14 CFR 221.190 - Time for filing and computation of time periods.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 4 2014-01-01 2014-01-01 false Time for filing and computation of time periods. 221.190 Section 221.190 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS TARIFFS Electronically Filed Tariffs § 221.190...

  1. 14 CFR 221.190 - Time for filing and computation of time periods.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 4 2013-01-01 2013-01-01 false Time for filing and computation of time periods. 221.190 Section 221.190 Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) ECONOMIC REGULATIONS TARIFFS Electronically Filed Tariffs § 221.190...

  2. Stochastic nonlinear time series forecasting using time-delay reservoir computers: performance and universality.

    PubMed

    Grigoryeva, Lyudmila; Henriques, Julie; Larger, Laurent; Ortega, Juan-Pablo

    2014-07-01

    Reservoir computing is a recently introduced machine learning paradigm that has already shown excellent performances in the processing of empirical data. We study a particular kind of reservoir computers called time-delay reservoirs that are constructed out of the sampling of the solution of a time-delay differential equation and show their good performance in the forecasting of the conditional covariances associated to multivariate discrete-time nonlinear stochastic processes of VEC-GARCH type as well as in the prediction of factual daily market realized volatilities computed with intraday quotes, using as training input daily log-return series of moderate size. We tackle some problems associated to the lack of task-universality for individually operating reservoirs and propose a solution based on the use of parallel arrays of time-delay reservoirs. PMID:24732236

  3. A heterogeneous hierarchical architecture for real-time computing

    SciTech Connect

    Skroch, D.A.; Fornaro, R.J.

    1988-12-01

    The need for high-speed data acquisition and control algorithms has prompted continued research in the area of multiprocessor systems and related programming techniques. The result presented here is a unique hardware and software architecture for high-speed real-time computer systems. The implementation of a prototype of this architecture has required the integration of architecture, operating systems and programming languages into a cohesive unit. This report describes a Heterogeneous Hierarchial Architecture for Real-Time (H{sup 2} ART) and system software for program loading and interprocessor communication.

  4. A Computer Simulation for Teaching Quantal Time Development

    NASA Astrophysics Data System (ADS)

    Styer, Daniel F.

    1996-11-01

    The computer program QMTime (for MS-DOS machines) enables students to simulate quantal time development in one dimension. A variety of initial wave packets (Gaussian, Lorentzian, etc.) can evolve in time under the influence of a variety of potential energy functions (step, ramp, square well, harmonic oscillator, etc.) with or without an external driving force. A novel visualization technique simultaneously displays the magnitude and phase of complex-valued wavefunctions. Either position-space or momentum-space wavefunctions, or both, can be shown. The program is particularly effective in demonstrating the classical limit of quantum mechanics. This program is part of the CUPS (Consortium for Upper level Physics Software) project.

  5. Video training with peer feedback in real-time consultation: acceptability and feasibility in a general-practice setting

    PubMed Central

    Eeckhout, Thomas; Gerits, Michiel; Bouquillon, Dries; Schoenmakers, Birgitte

    2016-01-01

    Objective Since many years, teaching and training in communication skills are cornerstones in the medical education curriculum. Although video recording in a real-time consultation is expected to positively contribute to the learning process, research on this topic is scarce. This study will focus on the feasibility and acceptability of video recording during real-time patient encounters performed by general practitioner (GP) trainees. Method The primary research question addressed the experiences (defined as feasibility and acceptability) of GP trainees in video-recorded vocational training in a general practice. The second research question addressed the appraisal of this training. The procedure of video-recorded training is developed, refined and validated by the Academic Teaching Practice of Leuven since 1974 (Faculty of Medicine of the University of Leuven). The study is set up as a cross-sectional survey without follow-up. Outcome measures were defined as ‘feasibility and acceptability’ (experiences of trainees) of the video-recorded training and were approached by a structured questionnaire with the opportunity to add free text comments. The studied sample consisted of all first-phase trainees of the GP Master 2011–2012 at the University of Leuven. Results Almost 70% of the trainees were positive about recording consultations. Nevertheless, over 60% believed that patients felt uncomfortable during the video-recorded encounter. Almost 90% noticed an improvement of own communication skills through the observation and evaluation of. Most students (85%) experienced the logistical issues as major barrier to perform video consultations on a regular base. Conclusions This study lays the foundation stone for further exploration of the video training in real-time consultations. Both students and teachers on the field acknowledge that the power of imaging is underestimated in the training of communication and vocational skills. The development of supportive

  6. The Exposure Assessment in Current Time Study: Implementation, Feasibility, and Acceptability of Real-Time Data Collection in a Community Cohort of Illicit Drug Users

    PubMed Central

    Kirk, Gregory D.; Linas, Beth S.; Westergaard, Ryan P.; Piggott, Damani; Bollinger, Robert C.; Chang, Larry W.

    2013-01-01

    Objective. We describe the study design and evaluate the implementation, feasibility, and acceptability of an ecological momentary assessment (EMA) study of illicit drug users. Design. Four sequential field trials targeting observation of 30 individuals followed for a four week period. Participants. Participants were recruited from an ongoing community-cohort of current or former injection drug users. Of 113 individuals enrolled, 109 completed study procedures during four trials conducted from November 2008 to May 2013. Methods. Hand-held electronic diaries used in the initial trials were transitioned to a smartphone platform for the final trial with identical data collection. Random-prompts delivered five times daily assessed participant location, activity, mood, and social context. Event-contingent data collection involved participant self-reports of illicit drug use and craving. Main Outcome Measures. Feasibility measures included participant retention, days of followup, random-prompt response rates, and device loss rate. Acceptability was evaluated from an end-of-trial questionnaire. Sociodemographic, behavioral, clinical, and trial characteristics were evaluated as correlates of weekly random-prompt response rates ≥80% using logistic regression with generalized estimating equations. Results. Study participants were a median of 48.5 years old, 90% African American, 52% male, and 59% HIV-infected with limited income and educational attainment. During a median followup of 28 days, 78% of 11,181 random-prompts delivered were answered (mean of 2.8 responses daily), while 2,798 participant-initiated events were reported (30% drug use events; 70% craving events). Self-reported acceptability to study procedures was uniformly favorable. Device loss was rare (only 1 lost device every 190 person-days of observation). Higher educational attainment was consistently associated with a higher response rate to random-prompts, while an association of HIV infection with lower

  7. Computing prestack Kirchhoff time migration on general purpose GPU

    NASA Astrophysics Data System (ADS)

    Shi, Xiaohua; Li, Chuang; Wang, Shihu; Wang, Xu

    2011-10-01

    This paper introduces how to optimize a practical prestack Kirchhoff time migration program by the Compute Unified Device Architecture (CUDA) on a general purpose GPU (GPGPU). A few useful optimization methods on GPGPU are demonstrated, such as how to increase the kernel thread numbers on GPU cores, and how to utilize the memory streams to overlap GPU kernel execution time, etc. The floating-point errors on CUDA and NVidia's GPUs are discussed in detail. Some effective methods that can be used to reduce the floating-point errors are introduced. The images generated by the practical prestack Kirchhoff time migration programs for the same real-world seismic data inputs on CPU and GPU are demonstrated. The final GPGPU approach on NVidia GTX 260 is more than 17 times faster than its original CPU version on Intel's P4 3.0G.

  8. STICK: Spike Time Interval Computational Kernel, a Framework for General Purpose Computation Using Neurons, Precise Timing, Delays, and Synchrony.

    PubMed

    Lagorce, Xavier; Benosman, Ryad

    2015-11-01

    There has been significant research over the past two decades in developing new platforms for spiking neural computation. Current neural computers are primarily developed to mimic biology. They use neural networks, which can be trained to perform specific tasks to mainly solve pattern recognition problems. These machines can do more than simulate biology; they allow us to rethink our current paradigm of computation. The ultimate goal is to develop brain-inspired general purpose computation architectures that can breach the current bottleneck introduced by the von Neumann architecture. This work proposes a new framework for such a machine. We show that the use of neuron-like units with precise timing representation, synaptic diversity, and temporal delays allows us to set a complete, scalable compact computation framework. The framework provides both linear and nonlinear operations, allowing us to represent and solve any function. We show usability in solving real use cases from simple differential equations to sets of nonlinear differential equations leading to chaotic attractors. PMID:26378879

  9. An Empirical Examination of EFL Learners' Perceptual Learning Styles and Acceptance of ASR-Based Computer-Assisted Pronunciation Training

    ERIC Educational Resources Information Center

    Hsu, Liwei

    2016-01-01

    This study aims to explore the structural relationships among the variables of EFL (English as a foreign language) learners' perceptual learning styles and Technology Acceptance Model (TAM). Three hundred and forty-one (n = 341) EFL learners were invited to join a self-regulated English pronunciation training program through automatic speech…

  10. VISA -- A computer pipeline to real-time data

    SciTech Connect

    Grafe, J.L.

    1994-12-31

    During the past decade many changes have taken place in the natural gas industry, not the least of which is the way information (data) is acquired, moved, compiled, integrated and disseminated within organizations. At El Paso Natural Gas Company (EPNG) the Operations Control Department has been at the center of these changes. The Systems Section within Operations Control has been instrumental in developing the computer programs that acquire and store real-time operational data, and then make it available to not only the Gas Control function, but also to anyone else within the company who might require it and, to a limited degree, any supplier or purchaser of gas utilizing the El Paso pipeline. These computer programs which make up the VISA system are, in effect, the tools that help move the data that flows in the pipeline of information within the company. Their integration into this pipeline process is the topic of this paper.

  11. In this issue: Time to replace doctors' judgement with computers.

    PubMed

    de Lusignan, Simon

    2015-01-01

    Informaticians continue to rise to the challenge, set by the English Health Minister, of trying to replace doctors' judgement with computers. This issue describes successes and where there are barriers. However, whilst there is progress this tends to be incremental and there are grand challenges to be overcome before computers can replace clinician. These grand challenges include: (1) improving usability so it is possible to more readily incorporate technology into clinical workflow; (2) rigorous new analytic methods that make use of the mass of available data, 'Big data', to create real-world evidence; (3) faster ways of meeting regulatory and legal requirements including ensuring privacy; (4) provision of reimbursement models to fund innovative technology that can substitute for clinical time and (5) recognition that innovations that improve quality also often increase cost. Informatics more is likely to support and augment clinical decision making rather than replace clinicians. PMID:26577428

  12. Computational Modeling of Semiconductor Dynamics at Femtosecond Time Scales

    NASA Technical Reports Server (NTRS)

    Agrawal, Govind P.; Goorjian, Peter M.

    1998-01-01

    The Interchange No. NCC2-5149 deals with the emerging technology of photonic (or optoelectronic) integrated circuits (PICs or OEICs). In PICs, optical and electronic components are grown together on the same chip. To build such devices and subsystems, one needs to model the entire chip. PICs are useful for building components for integrated optical transmitters, integrated optical receivers, optical data storage systems, optical interconnects, and optical computers. For example, the current commercial rate for optical data transmission is 2.5 gigabits per second, whereas the use of shorter pulses to improve optical transmission rates would yield an increase of 400 to 1000 times. The improved optical data transmitters would be used in telecommunications networks and computer local-area networks. Also, these components can be applied to activities in space, such as satellite to satellite communications, when the data transmissions are made at optical frequencies. The research project consisted of developing accurate computer modeling of electromagnetic wave propagation in semiconductors. Such modeling is necessary for the successful development of PICs. More specifically, these computer codes would enable the modeling of such devices, including their subsystems, such as semiconductor lasers and semiconductor amplifiers in which there is femtosecond pulse propagation. Presently, there are no computer codes that could provide this modeling. Current codes do not solve the full vector, nonlinear, Maxwell's equations, which are required for these short pulses and also current codes do not solve the semiconductor Bloch equations, which are required to accurately describe the material's interaction with femtosecond pulses. The research performed under NCC2-5149 solves the combined Maxwell's and Bloch's equations.

  13. Real-time computing without stable states: a new framework for neural computation based on perturbations.

    PubMed

    Maass, Wolfgang; Natschläger, Thomas; Markram, Henry

    2002-11-01

    A key challenge for neural modeling is to explain how a continuous stream of multimodal input from a rapidly changing environment can be processed by stereotypical recurrent circuits of integrate-and-fire neurons in real time. We propose a new computational model for real-time computing on time-varying input that provides an alternative to paradigms based on Turing machines or attractor neural networks. It does not require a task-dependent construction of neural circuits. Instead, it is based on principles of high-dimensional dynamical systems in combination with statistical learning theory and can be implemented on generic evolved or found recurrent circuitry. It is shown that the inherent transient dynamics of the high-dimensional dynamical system formed by a sufficiently large and heterogeneous neural circuit may serve as universal analog fading memory. Readout neurons can learn to extract in real time from the current state of such recurrent neural circuit information about current and past inputs that may be needed for diverse tasks. Stable internal states are not required for giving a stable output, since transient internal states can be transformed by readout neurons into stable target outputs due to the high dimensionality of the dynamical system. Our approach is based on a rigorous computational model, the liquid state machine, that, unlike Turing machines, does not require sequential transitions between well-defined discrete internal states. It is supported, as the Turing machine is, by rigorous mathematical results that predict universal computational power under idealized conditions, but for the biologically more realistic scenario of real-time processing of time-varying inputs. Our approach provides new perspectives for the interpretation of neural coding, the design of experiments and data analysis in neurophysiology, and the solution of problems in robotics and neurotechnology. PMID:12433288

  14. Energy and time determine scaling in biological and computer designs.

    PubMed

    Moses, Melanie; Bezerra, George; Edwards, Benjamin; Brown, James; Forrest, Stephanie

    2016-08-19

    Metabolic rate in animals and power consumption in computers are analogous quantities that scale similarly with size. We analyse vascular systems of mammals and on-chip networks of microprocessors, where natural selection and human engineering, respectively, have produced systems that minimize both energy dissipation and delivery times. Using a simple network model that simultaneously minimizes energy and time, our analysis explains empirically observed trends in the scaling of metabolic rate in mammals and power consumption and performance in microprocessors across several orders of magnitude in size. Just as the evolutionary transitions from unicellular to multicellular animals in biology are associated with shifts in metabolic scaling, our model suggests that the scaling of power and performance will change as computer designs transition to decentralized multi-core and distributed cyber-physical systems. More generally, a single energy-time minimization principle may govern the design of many complex systems that process energy, materials and information.This article is part of the themed issue 'The major synthetic evolutionary transitions'. PMID:27431524

  15. NNSA?s Computing Strategy, Acquisition Plan, and Basis for Computing Time Allocation

    SciTech Connect

    Nikkel, D J

    2009-07-21

    This report is in response to the Omnibus Appropriations Act, 2009 (H.R. 1105; Public Law 111-8) in its funding of the National Nuclear Security Administration's (NNSA) Advanced Simulation and Computing (ASC) Program. This bill called for a report on ASC's plans for computing and platform acquisition strategy in support of stockpile stewardship. Computer simulation is essential to the stewardship of the nation's nuclear stockpile. Annual certification of the country's stockpile systems, Significant Finding Investigations (SFIs), and execution of Life Extension Programs (LEPs) are dependent on simulations employing the advanced ASC tools developed over the past decade plus; indeed, without these tools, certification would not be possible without a return to nuclear testing. ASC is an integrated program involving investments in computer hardware (platforms and computing centers), software environments, integrated design codes and physical models for these codes, and validation methodologies. The significant progress ASC has made in the past derives from its focus on mission and from its strategy of balancing support across the key investment areas necessary for success. All these investment areas must be sustained for ASC to adequately support current stockpile stewardship mission needs and to meet ever more difficult challenges as the weapons continue to age or undergo refurbishment. The appropriations bill called for this report to address three specific issues, which are responded to briefly here but are expanded upon in the subsequent document: (1) Identify how computing capability at each of the labs will specifically contribute to stockpile stewardship goals, and on what basis computing time will be allocated to achieve the goal of a balanced program among the labs. (2) Explain the NNSA's acquisition strategy for capacity and capability of machines at each of the labs and how it will fit within the existing budget constraints. (3) Identify the technical

  16. RighTime: A real time clock correcting program for MS-DOS-based computer systems

    NASA Technical Reports Server (NTRS)

    Becker, G. Thomas

    1993-01-01

    A computer program is described which effectively eliminates the misgivings of the DOS system clock in PC/AT-class computers. RighTime is a small, sophisticated memory-resident program that automatically corrects both the DOS system clock and the hardware 'CMOS' real time clock (RTC) in real time. RighTime learns what corrections are required without operator interaction beyond the occasional accurate time set. Both warm (power on) and cool (power off) errors are corrected, usually yielding better than one part per million accuracy in the typical desktop computer with no additional hardware, and RighTime increases the system clock resolution from approximately 0.0549 second to 0.01 second. Program tools are also available which allow visualization of RighTime's actions, verification of its performance, display of its history log, and which provide data for graphing of the system clock behavior. The program has found application in a wide variety of industries, including astronomy, satellite tracking, communications, broadcasting, transportation, public utilities, manufacturing, medicine, and the military.

  17. Students Perception towards the Implementation of Computer Graphics Technology in Class via Unified Theory of Acceptance and Use of Technology (UTAUT) Model

    NASA Astrophysics Data System (ADS)

    Binti Shamsuddin, Norsila

    Technology advancement and development in a higher learning institution is a chance for students to be motivated to learn in depth in the information technology areas. Students should take hold of the opportunity to blend their skills towards these technologies as preparation for them when graduating. The curriculum itself can rise up the students' interest and persuade them to be directly involved in the evolvement of the technology. The aim of this study is to see how deep is the students' involvement as well as their acceptance towards the adoption of the technology used in Computer Graphics and Image Processing subjects. The study will be towards the Bachelor students in Faculty of Industrial Information Technology (FIIT), Universiti Industri Selangor (UNISEL); Bac. In Multimedia Industry, BSc. Computer Science and BSc. Computer Science (Software Engineering). This study utilizes the new Unified Theory of Acceptance and Use of Technology (UTAUT) to further validate the model and enhance our understanding of the adoption of Computer Graphics and Image Processing Technologies. Four (4) out of eight (8) independent factors in UTAUT will be studied towards the dependent factor.

  18. Predicting Cloud Computing Technology Adoption by Organizations: An Empirical Integration of Technology Acceptance Model and Theory of Planned Behavior

    ERIC Educational Resources Information Center

    Ekufu, ThankGod K.

    2012-01-01

    Organizations are finding it difficult in today's economy to implement the vast information technology infrastructure required to effectively conduct their business operations. Despite the fact that some of these organizations are leveraging on the computational powers and the cost-saving benefits of computing on the Internet cloud, others…

  19. Computer Program Recognizes Patterns in Time-Series Data

    NASA Technical Reports Server (NTRS)

    Hand, Charles

    2003-01-01

    A computer program recognizes selected patterns in time-series data like digitized samples of seismic or electrophysiological signals. The program implements an artificial neural network (ANN) and a set of N clocks for the purpose of determining whether N or more instances of a certain waveform, W, occur within a given time interval, T. The ANN must be trained to recognize W in the incoming stream of data. The first time the ANN recognizes W, it sets clock 1 to count down from T to zero; the second time it recognizes W, it sets clock 2 to count down from T to zero, and so forth through the Nth instance. On the N + 1st instance, the cycle is repeated, starting with clock 1. If any clock has not reached zero when it is reset, then N instances of W have been detected within time T, and the program so indicates. The program can readily be encoded in a field-programmable gate array or an application-specific integrated circuit that could be used, for example, to detect electroencephalographic or electrocardiographic waveforms indicative of epileptic seizures or heart attacks, respectively.

  20. Real-time computation of subdiffraction-resolution fluorescence images.

    PubMed

    Wolter, S; Schüttpelz, M; Tscherepanow, M; VAN DE Linde, S; Heilemann, M; Sauer, M

    2010-01-01

    In the recent past, single-molecule based localization or photoswitching microscopy methods such as stochastic optical reconstruction microscopy (STORM) or photoactivated localization microscopy (PALM) have been successfully implemented for subdiffraction-resolution fluorescence imaging. However, the computational effort needed to localize numerous fluorophores is tremendous, causing long data processing times and thereby limiting the applicability of the technique. Here we present a new computational scheme for data processing consisting of noise reduction, detection of likely fluorophore positions, high-precision fluorophore localization and subsequent visualization of found fluorophore positions in a super-resolution image. We present and benchmark different algorithms for noise reduction and demonstrate the use of non-maximum suppression to quickly find likely fluorophore positions in high depth and very noisy images. The algorithm is evaluated and compared in terms of speed, accuracy and robustness by means of simulated data. On real biological samples, we find that real-time data processing is possible and that super-resolution imaging with organic fluorophores of cellular structures with approximately 20 nm optical resolution can be completed in less than 10 s. PMID:20055915

  1. Real-time in vivo computed optical interferometric tomography.

    PubMed

    Ahmad, Adeel; Shemonski, Nathan D; Adie, Steven G; Kim, Hee-Seok; Hwu, Wen-Mei W; Carney, P Scott; Boppart, Stephen A

    2013-06-01

    High-resolution real-time tomography of scattering tissues is important for many areas of medicine and biology(1-6). However, the compromise between transverse resolution and depth-of-field in addition to low sensitivity deep in tissue continue to impede progress towards cellular-level volumetric tomography. Computed imaging has the potential to solve these long-standing limitations. Interferometric synthetic aperture microscopy (ISAM)(7-9) is a computed imaging technique enabling high-resolution volumetric tomography with spatially invariant resolution. However, its potential for clinical diagnostics remains largely untapped since full volume reconstructions required lengthy postprocessing, and the phase-stability requirements have been difficult to satisfy in vivo. Here we demonstrate how 3-D Fourier-domain resampling, in combination with high-speed optical coherence tomography (OCT), can achieve high-resolution in vivo tomography. Enhanced depth sensitivity was achieved over a depth-of-field extended in real time by more than an order of magnitude. This work lays the foundation for high-speed volumetric cellular-level tomography. PMID:23956790

  2. Accessible high performance computing solutions for near real-time image processing for time critical applications

    NASA Astrophysics Data System (ADS)

    Bielski, Conrad; Lemoine, Guido; Syryczynski, Jacek

    2009-09-01

    High Performance Computing (HPC) hardware solutions such as grid computing and General Processing on a Graphics Processing Unit (GPGPU) are now accessible to users with general computing needs. Grid computing infrastructures in the form of computing clusters or blades are becoming common place and GPGPU solutions that leverage the processing power of the video card are quickly being integrated into personal workstations. Our interest in these HPC technologies stems from the need to produce near real-time maps from a combination of pre- and post-event satellite imagery in support of post-disaster management. Faster processing provides a twofold gain in this situation: 1. critical information can be provided faster and 2. more elaborate automated processing can be performed prior to providing the critical information. In our particular case, we test the use of the PANTEX index which is based on analysis of image textural measures extracted using anisotropic, rotation-invariant GLCM statistics. The use of this index, applied in a moving window, has been shown to successfully identify built-up areas in remotely sensed imagery. Built-up index image masks are important input to the structuring of damage assessment interpretation because they help optimise the workload. The performance of computing the PANTEX workflow is compared on two different HPC hardware architectures: (1) a blade server with 4 blades, each having dual quad-core CPUs and (2) a CUDA enabled GPU workstation. The reference platform is a dual CPU-quad core workstation and the PANTEX workflow total computing time is measured. Furthermore, as part of a qualitative evaluation, the differences in setting up and configuring various hardware solutions and the related software coding effort is presented.

  3. Groundwater travel time computation for two-layer islands

    NASA Astrophysics Data System (ADS)

    Ketabchi, Hamed; Mahmoodzadeh, Davood; Ataie-Ashtiani, Behzad

    2016-06-01

    A closed-form analytical computation of groundwater travel time (GWTT) for two-layer oceanic small island aquifers is developed assuming steady-state and sharp-interface conditions. The two-layer geology impacts on the GWTT are investigated using the developed analytical solution to achieve a greater transparency of such conceptualizations. The results demonstrate that the inclusion of geologic layering leads to large changes in the GWTT. Sensitivity analyses, using specified dimensionless parameters, are employed to assess the influences of hydraulic conductivity, recharge rate, upper layer thickness, and seawater/freshwater density difference parameters, which influence the GWTT. These evaluations reveal that the GWTT is mainly influenced by the recharge rate and the upper layer thickness compared to the other influential parameters when the typical parameter ranges are considered.

  4. Multiscale Methods, Parallel Computation, and Neural Networks for Real-Time Computer Vision.

    NASA Astrophysics Data System (ADS)

    Battiti, Roberto

    1990-01-01

    This thesis presents new algorithms for low and intermediate level computer vision. The guiding ideas in the presented approach are those of hierarchical and adaptive processing, concurrent computation, and supervised learning. Processing of the visual data at different resolutions is used not only to reduce the amount of computation necessary to reach the fixed point, but also to produce a more accurate estimation of the desired parameters. The presented adaptive multiple scale technique is applied to the problem of motion field estimation. Different parts of the image are analyzed at a resolution that is chosen in order to minimize the error in the coefficients of the differential equations to be solved. Tests with video-acquired images show that velocity estimation is more accurate over a wide range of motion with respect to the homogeneous scheme. In some cases introduction of explicit discontinuities coupled to the continuous variables can be used to avoid propagation of visual information from areas corresponding to objects with different physical and/or kinematic properties. The human visual system uses concurrent computation in order to process the vast amount of visual data in "real -time." Although with different technological constraints, parallel computation can be used efficiently for computer vision. All the presented algorithms have been implemented on medium grain distributed memory multicomputers with a speed-up approximately proportional to the number of processors used. A simple two-dimensional domain decomposition assigns regions of the multiresolution pyramid to the different processors. The inter-processor communication needed during the solution process is proportional to the linear dimension of the assigned domain, so that efficiency is close to 100% if a large region is assigned to each processor. Finally, learning algorithms are shown to be a viable technique to engineer computer vision systems for different applications starting from

  5. 3D Vectorial Time Domain Computational Integrated Photonics

    SciTech Connect

    Kallman, J S; Bond, T C; Koning, J M; Stowell, M L

    2007-02-16

    The design of integrated photonic structures poses considerable challenges. 3D-Time-Domain design tools are fundamental in enabling technologies such as all-optical logic, photonic bandgap sensors, THz imaging, and fast radiation diagnostics. Such technologies are essential to LLNL and WFO sponsors for a broad range of applications: encryption for communications and surveillance sensors (NSA, NAI and IDIV/PAT); high density optical interconnects for high-performance computing (ASCI); high-bandwidth instrumentation for NIF diagnostics; micro-sensor development for weapon miniaturization within the Stockpile Stewardship and DNT programs; and applications within HSO for CBNP detection devices. While there exist a number of photonics simulation tools on the market, they primarily model devices of interest to the communications industry. We saw the need to extend our previous software to match the Laboratory's unique emerging needs. These include modeling novel material effects (such as those of radiation induced carrier concentrations on refractive index) and device configurations (RadTracker bulk optics with radiation induced details, Optical Logic edge emitting lasers with lateral optical inputs). In addition we foresaw significant advantages to expanding our own internal simulation codes: parallel supercomputing could be incorporated from the start, and the simulation source code would be accessible for modification and extension. This work addressed Engineering's Simulation Technology Focus Area, specifically photonics. Problems addressed from the Engineering roadmap of the time included modeling the Auston switch (an important THz source/receiver), modeling Vertical Cavity Surface Emitting Lasers (VCSELs, which had been envisioned as part of fast radiation sensors), and multi-scale modeling of optical systems (for a variety of applications). We proposed to develop novel techniques to numerically solve the 3D multi-scale propagation problem for both the microchip

  6. Consumer Security Perceptions and the Perceived Influence on Adopting Cloud Computing: A Quantitative Study Using the Technology Acceptance Model

    ERIC Educational Resources Information Center

    Paquet, Katherine G.

    2013-01-01

    Cloud computing may provide cost benefits for organizations by eliminating the overhead costs of software, hardware, and maintenance (e.g., license renewals, upgrading software, servers and their physical storage space, administration along with funding a large IT department). In addition to the promised savings, the organization may require…

  7. Program Predicts Time Courses of Human/Computer Interactions

    NASA Technical Reports Server (NTRS)

    Vera, Alonso; Howes, Andrew

    2005-01-01

    CPM X is a computer program that predicts sequences of, and amounts of time taken by, routine actions performed by a skilled person performing a task. Unlike programs that simulate the interaction of the person with the task environment, CPM X predicts the time course of events as consequences of encoded constraints on human behavior. The constraints determine which cognitive and environmental processes can occur simultaneously and which have sequential dependencies. The input to CPM X comprises (1) a description of a task and strategy in a hierarchical description language and (2) a description of architectural constraints in the form of rules governing interactions of fundamental cognitive, perceptual, and motor operations. The output of CPM X is a Program Evaluation Review Technique (PERT) chart that presents a schedule of predicted cognitive, motor, and perceptual operators interacting with a task environment. The CPM X program allows direct, a priori prediction of skilled user performance on complex human-machine systems, providing a way to assess critical interfaces before they are deployed in mission contexts.

  8. Gender, Gender Identity, Rape Myth Acceptance, and Time of Initial Resistance on the Perception of Acquaintance Rape Blame and Avoidability.

    ERIC Educational Resources Information Center

    Kopper, Beverly A.

    1996-01-01

    Investigated the role of gender, gender role identity, rape myth acceptance, and initial resistance in assigning blame in the case of acquaintance rape, and studied the perceived avoidability of the assault for 355 female and 179 male college students. The gender differences in responses are discussed. (SLD)

  9. Chemistry, physics and time: the computer modelling of glassmaking.

    PubMed

    Martlew, David

    2003-01-01

    A decade or so ago the remains of an early flat glass furnace were discovered in St Helens. Continuous glass production only became feasible after the Siemens Brothers demonstrated their continuous tank furnace at Dresden in 1870. One manufacturer of flat glass enthusiastically adopted the new technology and secretly explored many variations on this theme during the next fifteen years. Study of the surviving furnace remains using today's computer simulation techniques showed how, in 1887, that technology was adapted to the special demands of window glass making. Heterogeneous chemical reactions at high temperatures are required to convert the mixture of granular raw materials into the homogeneous glass needed for windows. Kinetics (and therefore the economics) of glassmaking is dominated by heat transfer and chemical diffusion as refractory grains are converted to highly viscous molten glass. Removal of gas bubbles in a sufficiently short period of time is vital for profitability, but the glassmaker must achieve this in a reaction vessel which is itself being dissolved by the molten glass. Design and operational studies of today's continuous tank furnaces need to take account of these factors, and good use is made of computer simulation techniques to shed light on the way furnaces behave and how improvements may be made. This paper seeks to show how those same techniques can be used to understand how the early Siemens continuous tank furnaces were designed and operated, and how the Victorian entrepreneurs succeeded in managing the thorny problems of what was, in effect, a vulnerable high temperature continuous chemical reactor. PMID:12555863

  10. Reducing the computational footprint for real-time BCPNN learning

    PubMed Central

    Vogginger, Bernhard; Schüffny, René; Lansner, Anders; Cederström, Love; Partzsch, Johannes; Höppner, Sebastian

    2015-01-01

    The implementation of synaptic plasticity in neural simulation or neuromorphic hardware is usually very resource-intensive, often requiring a compromise between efficiency and flexibility. A versatile, but computationally-expensive plasticity mechanism is provided by the Bayesian Confidence Propagation Neural Network (BCPNN) paradigm. Building upon Bayesian statistics, and having clear links to biological plasticity processes, the BCPNN learning rule has been applied in many fields, ranging from data classification, associative memory, reward-based learning, probabilistic inference to cortical attractor memory networks. In the spike-based version of this learning rule the pre-, postsynaptic and coincident activity is traced in three low-pass-filtering stages, requiring a total of eight state variables, whose dynamics are typically simulated with the fixed step size Euler method. We derive analytic solutions allowing an efficient event-driven implementation of this learning rule. Further speedup is achieved by first rewriting the model which reduces the number of basic arithmetic operations per update to one half, and second by using look-up tables for the frequently calculated exponential decay. Ultimately, in a typical use case, the simulation using our approach is more than one order of magnitude faster than with the fixed step size Euler method. Aiming for a small memory footprint per BCPNN synapse, we also evaluate the use of fixed-point numbers for the state variables, and assess the number of bits required to achieve same or better accuracy than with the conventional explicit Euler method. All of this will allow a real-time simulation of a reduced cortex model based on BCPNN in high performance computing. More important, with the analytic solution at hand and due to the reduced memory bandwidth, the learning rule can be efficiently implemented in dedicated or existing digital neuromorphic hardware. PMID:25657618

  11. Reducing the computational footprint for real-time BCPNN learning.

    PubMed

    Vogginger, Bernhard; Schüffny, René; Lansner, Anders; Cederström, Love; Partzsch, Johannes; Höppner, Sebastian

    2015-01-01

    The implementation of synaptic plasticity in neural simulation or neuromorphic hardware is usually very resource-intensive, often requiring a compromise between efficiency and flexibility. A versatile, but computationally-expensive plasticity mechanism is provided by the Bayesian Confidence Propagation Neural Network (BCPNN) paradigm. Building upon Bayesian statistics, and having clear links to biological plasticity processes, the BCPNN learning rule has been applied in many fields, ranging from data classification, associative memory, reward-based learning, probabilistic inference to cortical attractor memory networks. In the spike-based version of this learning rule the pre-, postsynaptic and coincident activity is traced in three low-pass-filtering stages, requiring a total of eight state variables, whose dynamics are typically simulated with the fixed step size Euler method. We derive analytic solutions allowing an efficient event-driven implementation of this learning rule. Further speedup is achieved by first rewriting the model which reduces the number of basic arithmetic operations per update to one half, and second by using look-up tables for the frequently calculated exponential decay. Ultimately, in a typical use case, the simulation using our approach is more than one order of magnitude faster than with the fixed step size Euler method. Aiming for a small memory footprint per BCPNN synapse, we also evaluate the use of fixed-point numbers for the state variables, and assess the number of bits required to achieve same or better accuracy than with the conventional explicit Euler method. All of this will allow a real-time simulation of a reduced cortex model based on BCPNN in high performance computing. More important, with the analytic solution at hand and due to the reduced memory bandwidth, the learning rule can be efficiently implemented in dedicated or existing digital neuromorphic hardware. PMID:25657618

  12. Access to chronic disease care in general practice: the acceptability of implementing systematic waiting-room screening using computer-based patient-reported risk status

    PubMed Central

    Paul, Christine L; Carey, Mariko; Yoong, Sze Lin; D’Este, Catherine; Makeham, Meredith; Henskens, Frans

    2013-01-01

    Background Routine screening and advice regarding risky lifestyle behaviours is appropriate in the primary care setting, but often not implemented. Routine electronic collection of patients’ self-reported data may streamline the collection of such information. Aim To explore the perceptions of GPs and their attending patients regarding the acceptability of waiting-room touchscreen computers for the collection of health behaviour information. Uptake, ease of operation, and the perceived likelihood of future implementation were studied. Design and setting Cross-sectional health-risk survey. General practices in metropolitan areas in Australia. Method Practices were randomly selected by postcode. Consecutive patients who were eligible to take part in the study were approached in the waiting room and invited to do so. Participants completed the touchscreen health survey. A subsample of patients and GPs completed additional items regarding acceptability. Results Twelve general practices participated in the study, with 4058 patients (86%) and 51 of 68 (75%) GPs consenting to complete the health-risk survey, 596 patients and 30 GPs were selected to complete the acceptability survey. A majority of the 30 GPs indicated that the operation of the survey was not disruptive to practice and more than 90% of patients responded positively to all items regarding its operation. More than three-quarters of the patient sample were willing to consider allowing their responses to be kept on file and complete such surveys in the future. Conclusion As waiting-room-based collection of this information appears to be both feasible and acceptable, practitioners should consider collecting and incorporating routine patient-reported health behaviours for inclusion in the medical record. PMID:23998842

  13. Assessment of wear and periacetabular osteolysis using dual energy computed tomography on a pig cadaver to identify the lowest acceptable radiation dose

    PubMed Central

    Skorpil, M.; Nowik, P.; Olivecrona, H.; Crafoord, J.; Weidenhielm, L.; Persson, A.

    2016-01-01

    Objectives Computed tomography (CT) plays an important role in evaluating wear and periacetabular osteolysis (PAO) in total hip replacements. One concern with CT is the high radiation exposure since standard pelvic CT provides approximately 3.5 millisieverts (mSv) of radiation exposure, whereas a planar radiographic examination with three projections totals approximately 0.5 mSv. The objective of this study was to evaluate the lowest acceptable radiation dose for dual-energy CT (DECT) images when measuring wear and periacetabular osteolysis in uncemented metal components. Materials and Methods A porcine pelvis with bilateral uncemented hip prostheses and with known linear wear and acetabular bone defects was examined in a third-generation multidetector DECT scanner. The examinations were performed with four different radiation levels both with and without iterative reconstruction techniques. From the high and low peak kilo voltage acquisitions, polychrmoatic images were created together with virtual monochromatic images of energies 100 kiloelectron volts (keV) and 150 keV. Results We could assess wear and PAO while substantially lowering the effective radiation dose to 0.7 mSv for a total pelvic view with an accuracy of around 0.5 mm for linear wear and 2 mm to 3 mm for PAO. Conclusion CT for detection of prosthetic wear and PAO could be used with clinically acceptable accuracy at a radiation exposure level equal to plain radiographic exposures. Cite this article: B. Sandgren, M. Skorpil, P. Nowik, H. Olivecrona, J. Crafoord, L. Weidenhielm, A. Persson. Assessment of wear and periacetabular osteolysis using dual energy computed tomography on a pig cadaver to identify the lowest acceptable radiation dose. Bone Joint Res 2016;5:307–313. DOI: 10.1302/2046-3758.57.2000566. PMID:27445358

  14. Time-Domain Terahertz Computed Axial Tomography NDE System

    NASA Technical Reports Server (NTRS)

    Zimdars, David

    2012-01-01

    NASA has identified the need for advanced non-destructive evaluation (NDE) methods to characterize aging and durability in aircraft materials to improve the safety of the nation's airline fleet. 3D THz tomography can play a major role in detection and characterization of flaws and degradation in aircraft materials, including Kevlar-based composites and Kevlar and Zylon fabric covers for soft-shell fan containment where aging and durability issues are critical. A prototype computed tomography (CT) time-domain (TD) THz imaging system has been used to generate 3D images of several test objects including a TUFI tile (a thermal protection system tile used on the Space Shuttle and possibly the Orion or similar capsules). This TUFI tile had simulated impact damage that was located and the depth of damage determined. The CT motion control gan try was designed and constructed, and then integrated with a T-Ray 4000 control unit and motion controller to create a complete CT TD-THz imaging system prototype. A data collection software script was developed that takes multiple z-axis slices in sequence and saves the data for batch processing. The data collection software was integrated with the ability to batch process the slice data with the CT TD-THz image reconstruction software. The time required to take a single CT slice was decreased from six minutes to approximately one minute by replacing the 320 ps, 100-Hz waveform acquisition system with an 80 ps, 1,000-Hz waveform acquisition system. The TD-THZ computed tomography system was built from pre-existing commercial off-the-shelf subsystems. A CT motion control gantry was constructed from COTS components that can handle larger samples. The motion control gantry allows inspection of sample sizes of up to approximately one cubic foot (.0.03 cubic meters). The system reduced to practice a CT-TDTHz system incorporating a COTS 80- ps/l-kHz waveform scanner. The incorporation of this scanner in the system allows acquisition of 3D

  15. 29 CFR 459.1 - Computation of time for filing papers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 2 2012-07-01 2012-07-01 false Computation of time for filing papers. 459.1 Section 459.1... OF CONDUCT MISCELLANEOUS § 459.1 Computation of time for filing papers. In computing any period of... computations. When these regulations require the filing of any paper, such document must be received by...

  16. Computers for real time flight simulation: A market survey

    NASA Technical Reports Server (NTRS)

    Bekey, G. A.; Karplus, W. J.

    1977-01-01

    An extensive computer market survey was made to determine those available systems suitable for current and future flight simulation studies at Ames Research Center. The primary requirement is for the computation of relatively high frequency content (5 Hz) math models representing powered lift flight vehicles. The Rotor Systems Research Aircraft (RSRA) was used as a benchmark vehicle for computation comparison studies. The general nature of helicopter simulations and a description of the benchmark model are presented, and some of the sources of simulation difficulties are examined. A description of various applicable computer architectures is presented, along with detailed discussions of leading candidate systems and comparisons between them.

  17. Avoiding pitfalls in simulating real-time computer systems

    NASA Technical Reports Server (NTRS)

    Smith, R. S.

    1984-01-01

    The software simulation of a computer target system on a computer host system, known as an interpretive computer simulator (ICS), functionally models and implements the action of the target hardware. For an ICS to function as efficiently as possible and to avoid certain pitfalls in designing an ICS, it is important that the details of the hardware architectural design of both the target and the host computers be known. This paper discusses both host selection considerations and ICS design features that, without proper consideration, could make the resulting ICS too slow to use or too costly to maintain and expand.

  18. Use of Respiratory-Correlated Four-Dimensional Computed Tomography to Determine Acceptable Treatment Margins for Locally Advanced Pancreatic Adenocarcinoma

    SciTech Connect

    Goldstein, Seth D.; Ford, Eric C.; Duhon, Mario; McNutt, Todd; Wong, John; Herman, Joseph M.

    2010-02-01

    Purpose: Respiratory-induced excursions of locally advanced pancreatic adenocarcinoma could affect dose delivery. This study quantified tumor motion and evaluated standard treatment margins. Methods and Materials: Respiratory-correlated four-dimensional computed tomography images were obtained on 30 patients with locally advanced pancreatic adenocarcinoma; 15 of whom underwent repeat scanning before cone-down treatment. Treatment planning software was used to contour the gross tumor volume (GTV), bilateral kidneys, and biliary stent. Excursions were calculated according to the centroid of the contoured volumes. Results: The mean +- standard deviation GTV excursion in the superoinferior (SI) direction was 0.55 +- 0.23 cm; an expansion of 1.0 cm adequately accounted for the GTV motion in 97% of locally advanced pancreatic adenocarcinoma patients. Motion GTVs were generated and resulted in a 25% average volume increase compared with the static GTV. Of the 30 patients, 17 had biliary stents. The mean SI stent excursion was 0.84 +- 0.32 cm, significantly greater than the GTV motion. The xiphoid process moved an average of 0.35 +- 0.12 cm, significantly less than the GTV. The mean SI motion of the left and right kidneys was 0.65 +- 0.27 cm and 0.77 +- 0.30 cm, respectively. At repeat scanning, no significant changes were seen in the mean GTV size (p = .8) or excursion (p = .3). Conclusion: These data suggest that an asymmetric expansion of 1.0, 0.7, and 0.6 cm along the respective SI, anteroposterior, and medial-lateral directions is recommended if a respiratory-correlated four-dimensional computed tomography scan is not available to evaluate the tumor motion during treatment planning. Surrogates of tumor motion, such as biliary stents or external markers, should be used with caution.

  19. Cluster Computing For Real Time Seismic Array Analysis.

    NASA Astrophysics Data System (ADS)

    Martini, M.; Giudicepietro, F.

    A seismic array is an instrument composed by a dense distribution of seismic sen- sors that allow to measure the directional properties of the wavefield (slowness or wavenumber vector) radiated by a seismic source. Over the last years arrays have been widely used in different fields of seismological researches. In particular they are applied in the investigation of seismic sources on volcanoes where they can be suc- cessfully used for studying the volcanic microtremor and long period events which are critical for getting information on the volcanic systems evolution. For this reason arrays could be usefully employed for the volcanoes monitoring, however the huge amount of data produced by this type of instruments and the processing techniques which are quite time consuming limited their potentiality for this application. In order to favor a direct application of arrays techniques to continuous volcano monitoring we designed and built a small PC cluster able to near real time computing the kinematics properties of the wavefield (slowness or wavenumber vector) produced by local seis- mic source. The cluster is composed of 8 Intel Pentium-III bi-processors PC working at 550 MHz, and has 4 Gigabytes of RAM memory. It runs under Linux operating system. The developed analysis software package is based on the Multiple SIgnal Classification (MUSIC) algorithm and is written in Fortran. The message-passing part is based upon the LAM programming environment package, an open-source imple- mentation of the Message Passing Interface (MPI). The developed software system includes modules devote to receiving date by internet and graphical applications for the continuous displaying of the processing results. The system has been tested with a data set collected during a seismic experiment conducted on Etna in 1999 when two dense seismic arrays have been deployed on the northeast and the southeast flanks of this volcano. A real time continuous acquisition system has been simulated by

  20. Individual and Sex Differences in the Zone of Acceptable Alternatives.

    ERIC Educational Resources Information Center

    Leung, S. Alvin; Harmon, Lenore W.

    1990-01-01

    Examined zone of acceptable alternatives construct from Gottfredson's theory of career aspiration. College students' (N=246) responses to Occupations List were coded with measurements of sex type and prestige, and indicators of zone of acceptable alternatives for subjects' were computed. Found changes over time and differences related to gender…

  1. 12 CFR 390.102 - How does the FDIC compute time periods under this subpart?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 5 2014-01-01 2014-01-01 false How does the FDIC compute time periods under... Application Processing Procedures § 390.102 How does the FDIC compute time periods under this subpart? In computing time periods under this subpart, the FDIC does not include the day of the act or event...

  2. 12 CFR 390.102 - How does the FDIC compute time periods under this subpart?

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 5 2013-01-01 2013-01-01 false How does the FDIC compute time periods under... Application Processing Procedures § 390.102 How does the FDIC compute time periods under this subpart? In computing time periods under this subpart, the FDIC does not include the day of the act or event...

  3. 12 CFR 116.10 - How does the OCC compute time periods under this part?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 1 2012-01-01 2012-01-01 false How does the OCC compute time periods under... TREASURY APPLICATION PROCESSING PROCEDURES § 116.10 How does the OCC compute time periods under this part? In computing time periods under this part, the OCC does not include the day of the act or event...

  4. 12 CFR 116.10 - How does the OCC compute time periods under this part?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 1 2014-01-01 2014-01-01 false How does the OCC compute time periods under... TREASURY APPLICATION PROCESSING PROCEDURES § 116.10 How does the OCC compute time periods under this part? In computing time periods under this part, the OCC does not include the day of the act or event...

  5. 12 CFR 390.102 - How does the FDIC compute time periods under this subpart?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 5 2012-01-01 2012-01-01 false How does the FDIC compute time periods under... Application Processing Procedures § 390.102 How does the FDIC compute time periods under this subpart? In computing time periods under this subpart, the FDIC does not include the day of the act or event...

  6. 12 CFR 116.10 - How does the OCC compute time periods under this part?

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 1 2013-01-01 2013-01-01 false How does the OCC compute time periods under... TREASURY APPLICATION PROCESSING PROCEDURES § 116.10 How does the OCC compute time periods under this part? In computing time periods under this part, the OCC does not include the day of the act or event...

  7. Computational Modeling of Semiconductor Dynamics at Femtosecond Time Scales

    NASA Technical Reports Server (NTRS)

    Agrawal, Govind P.; Goorjian, Peter M.

    1998-01-01

    The main objective of the Joint-Research Interchange NCC2-5149 was to develop computer codes for accurate simulation of femtosecond pulse propagation in semiconductor lasers and semiconductor amplifiers [I]. The code should take into account all relevant processes such as the interband and intraband carrier relaxation mechanisms and the many-body effects arising from the Coulomb interaction among charge carriers [2]. This objective was fully accomplished. We made use of a previously developed algorithm developed at NASA Ames [3]-[5]. The new algorithm was tested on several problems of practical importance. One such problem was related to the amplification of femtosecond optical pulses in semiconductors. These results were presented in several international conferences over a period of three years. With the help of a postdoctoral fellow, we also investigated the origin of instabilities that can lead to the formation of femtosecond pulses in different kinds of lasers. We analyzed the occurrence of absolute instabilities in lasers that contain a dispersive host material with third-order nonlinearities. Starting from the Maxwell-Bloch equations, we derived general multimode equations to distinguish between convective and absolute instabilities. We find that both self-phase modulation and intensity-dependent absorption can dramatically affect the absolute stability of such lasers. In particular, the self-pulsing threshold (the so-called second laser threshold) can occur at few times the first laser threshold even in good-cavity lasers for which no self-pulsing occurs in the absence of intensity-dependent absorption. These results were presented in an international conference and published in the form of two papers.

  8. Time-dependent computational studies of flames in microgravity

    NASA Technical Reports Server (NTRS)

    Oran, Elaine S.; Kailasanath, K.

    1989-01-01

    The research performed at the Center for Reactive Flow and Dynamical Systems in the Laboratory for Computational Physics and Fluid Dynamics, at the Naval Research Laboratory, in support of the NASA Microgravity Science and Applications Program is described. The primary focus was on investigating fundamental questions concerning the propagation and extinction of premixed flames in Earth gravity and in microgravity environments. The approach was to use detailed time-dependent, multispecies, numerical models as tools to simulate flames in different gravity environments. The models include a detailed chemical kinetics mechanism consisting of elementary reactions among the eight reactive species involved in hydrogen combustion, coupled to algorithms for convection, thermal conduction, viscosity, molecular and thermal diffusion, and external forces. The external force, gravity, can be put in any direction relative to flame propagation and can have a range of values. A combination of one-dimensional and two-dimensional simulations was used to investigate the effects of curvature and dilution on ignition and propagation of flames, to help resolve fundamental questions on the existence of flammability limits when there are no external losses or buoyancy forces in the system, to understand the mechanism leading to cellular instability, and to study the effects of gravity on the transition to cellular structure. A flame in a microgravity environment can be extinguished without external losses, and the mechanism leading to cellular structure is not preferential diffusion but a thermo-diffusive instability. The simulations have also lead to a better understanding of the interactions between buoyancy forces and the processes leading to thermo-diffusive instability.

  9. Computationally efficient algorithms for real-time attitude estimation

    NASA Technical Reports Server (NTRS)

    Pringle, Steven R.

    1993-01-01

    For many practical spacecraft applications, algorithms for determining spacecraft attitude must combine inputs from diverse sensors and provide redundancy in the event of sensor failure. A Kalman filter is suitable for this task, however, it may impose a computational burden which may be avoided by sub optimal methods. A suboptimal estimator is presented which was implemented successfully on the Delta Star spacecraft which performed a 9 month SDI flight experiment in 1989. This design sought to minimize algorithm complexity to accommodate the limitations of an 8K guidance computer. The algorithm used is interpreted in the framework of Kalman filtering and a derivation is given for the computation.

  10. 31 CFR 29.105 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... annuity computation purposes— (i) The service of a participant under the Police and Firefighters Plan who... pay (LWOP) that is creditable service. (1) Under the Police and Firefighters Plan, credit is...

  11. Comparison between Utsu's and Vere-Jones' aftershocks model by means of a computer simulation based on the acceptance-rejection sampling of von Neumann

    NASA Astrophysics Data System (ADS)

    Reyes, J.; Morales-Esteban, A.; González, E.; Martínez-Álvarez, F.

    2016-07-01

    In this research, a new algorithm for generating a stochastic earthquake catalog is presented. The algorithm is based on the acceptance-rejection sampling of von Neumann. The result is a computer simulation of earthquakes based on the calculated statistical properties of each zone. Vere-Jones states that an earthquake sequence can be modeled as a series of random events. This is the model used in the proposed simulation. Contrariwise, Utsu indicates that the mainshocks are special geophysical events. The algorithm has been applied to zones of Chile, China, Spain, Japan, and the USA. This allows classifying the zones according to Vere-Jones' or Utsu's model. The results have been quantified relating the mainshock with the largest aftershock within the next 5 days (which has been named as Bath event). The results show that some zones fit Utsu's model and others Vere-Jones'. Finally, the fraction of seismic events that satisfy certain properties of magnitude and occurrence is analyzed.

  12. Time independent universal computing with spin chains: quantum plinko machine

    NASA Astrophysics Data System (ADS)

    Thompson, K. F.; Gokler, C.; Lloyd, S.; Shor, P. W.

    2016-07-01

    We present a scheme for universal quantum computing using XY Heisenberg spin chains. Information is encoded into packets propagating down these chains, and they interact with each other to perform universal quantum computation. A circuit using g gate blocks on m qubits can be encoded into chains of length O({g}3+δ {m}3+δ ) for all δ \\gt 0 with vanishingly small error.

  13. Time-dependent Computational Studies of Premixed Flames in Microgravity

    NASA Technical Reports Server (NTRS)

    Kailasanath, K.; Patnaik, Gopal; Oran, Elaine S.

    1993-01-01

    This report describes the research performed at the Center for Reactive Flow and Dynamical Systems in the Laboratory for Computational Physics and Fluid Dynamics, at the Naval Research Laboratory, in support of NASA Microgravity Science and Applications Program. The primary focus of this research is on investigating fundamental questions concerning the propagation and extinction of premixed flames in earth gravity and in microgravity environments. Our approach is to use detailed time-dependent, multispecies, numerical models as tools to simulate flames in different gravity environments. The models include a detailed chemical kinetics mechanism consisting of elementary reactions among the eight reactive species involved in hydrogen combustion, coupled to algorithms for convection, thermal conduction, viscosity, molecular and thermal diffusion, and external forces. The external force, gravity, can be put in any direction relative to flame propagation and can have a range of values. Recently more advanced wall boundary conditions such as isothermal and no-slip have been added to the model. This enables the simulation of flames propagating in more practical systems than before. We have used the numerical simulations to investigate the effects of heat losses and buoyancy forces on the structure and stability of flames, to help resolve fundamental questions on the existence of flammability limits when there are no external losses or buoyancy forces in the system, to understand the interaction between the various processes leading to flame instabilities and extinguishment, and to study the dynamics of cell formation and splitting. Our studies have been able to bring out the differences between upward- and downward-propagating flames and predict the zero-gravity behavior of these flames. The simulations have also highlighted the dominant role of wall heat losses in the case of downward-propagating flames. The simulations have been able to qualitatively predict the

  14. Time-Dependent Density Functional Theory for Universal Quantum Computation

    NASA Astrophysics Data System (ADS)

    Tempel, David

    2015-03-01

    In this talk, I will discuss how the theorems of TDDFT can be applied to a class of qubit Hamiltonians that are universal for quantum computation. The theorems of TDDFT applied to universal Hamiltonians imply that single-qubit expectation values can be used as the basic variables in quantum computation and information theory, rather than wavefunctions. From a practical standpoint this opens the possibility of approximating observables of interest in quantum computations directly in terms of single-qubit quantities (i.e. as density functionals). Additionally, I will discuss how TDDFT provides an exact prescription for simulating universal Hamiltonians with other universal Hamiltonians that have different, and possibly easier-to-realize two-qubit interactions.

  15. Patients' Perspectives on Wait Times and the Referral-Consultation Process While Attending a Tertiary Diabetes and Endocrinology Centre: Is Econsultation an Acceptable Option?

    PubMed

    Keely, Erin; Traczyk, Lara; Liddy, Clare

    2015-08-01

    The goal of this study was to establish patients' perspectives on the acceptability of wait times, the impact of wait times on their health and the possibility of using electronic consultations (eConsultations) to avoid visits to specialists. A 2-stage patient survey (self-administered and with a follow-up telephone call) and a chart audit was conducted on a sequential sample of patients attending their initial consultations in a tertiary diabetes and endocrinology centre. Patients' perspectives on actual and ideal wait times, the impact of waiting for access, the effectiveness of the referral-consultation process and attitudes toward eConsultations as an alternative to traditional referral-consultations were collected. The study involved 101 patients (22% for diabetes, 78% for endocrinologic conditions), whose comments were collated and categorized. Of the 101 patients who completed the survey, 61 also completed telephone interviews. The average wait time was 19 weeks; the median 10 weeks. More than 30% of patients waited longer than 6 months and 6% waited longer than 1 year. Overall, 90% of patients thought that the maximum wait time should be less than 3 months. While waiting, 58% of patients worried about a serious undiagnosed disease, 30% found their symptoms had affected their daily activities and 24% had to miss work or school due to symptoms. Of the patients, 46% considered eConsultation a viable alternative to face-to-face visits. Excessive wait times for specialist care remain barriers and have negative impacts on patients. Wait times significantly exceeded times patients considered acceptable. eConsultations provide acceptable alternatives for many patients, and they reduced the number of patients requiring traditional consultations. PMID:25797111

  16. Time-averaged and time-dependent computations of isothermal flowfields in a centerbody combustor

    NASA Astrophysics Data System (ADS)

    Krishnamurthy, L.; Raju, M. S.; Creed, M. J.; Memering, J. N.

    1984-12-01

    A numerical investigation of the near-wake region in a ducted bluff-body combustor by finite-difference computations is reported. The numerical predictions are based upon: (1) the Reynolds-averaged Navier Stokes equations and the k-epsilon turbulence model; and (2) the time-dependent, compressible Navier-Stokes equations, The standard K-epsilon turbulence model was modified to account for the effect of streamline curvature and for the preferential influence of normal stresses. The time-averaged calculations addressed the turbulent mixing under isothermal conditions in: (1) the large and small-scale centerbody combustor configurations, due to annular air flow and central CO2 flow; and (2) the two-dimensional mixing-layer configuration, due to two streams of nitrogen at different velocities. The time-dependent calculations addressed the near-wake flowfield of the large-scale centerbody combustor configuration with only the annular air stream present. The Reynolds-averaged predictions examined the influence of the turbulence model corrections and geometric scale under varying annular and central flows on: (1) the axial and radial distributions of the mean and fluctuating components of the axial and radial velocities and of the mean CO2 concentrations; and (2) the axial and the radial locations of the vortex center, as well as the magnitude and location of the minimum centerline mean axial velocity. Comparison of the predicted results with experimental data emphasizes and clarifies the complex flowfield interactions of the recirculating near-wake region.

  17. 5 CFR 2429.21 - Computation of time for filing papers.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 3 2010-01-01 2010-01-01 false Computation of time for filing papers... REQUIREMENTS General Requirements § 2429.21 Computation of time for filing papers. (a) In computing any period... § 2429.23(a) of this part, when this subchapter requires the filing of any paper with the Authority,...

  18. A Computer in the Classroom: The Time Is Right.

    ERIC Educational Resources Information Center

    Kraines, David P.; Smith, David A.

    1988-01-01

    The goal was to make the "super blackboard" and "super calculator" capabilities of the computer routinely available to instructors in undergraduate mathematics courses. A good approximation to that goal is described in terms of hardware, display, physical setup, instructors, and software. Alternate solutions and other considerations are included.…

  19. 15 CFR 971.805 - Computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... part or 15 CFR part 970, but when a time period expires on any of these days, that time period will be... ENVIRONMENTAL DATA SERVICE DEEP SEABED MINING REGULATIONS FOR COMMERCIAL RECOVERY PERMITS Miscellaneous §...

  20. 15 CFR 971.805 - Computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... part or 15 CFR part 970, but when a time period expires on any of these days, that time period will be... ENVIRONMENTAL DATA SERVICE DEEP SEABED MINING REGULATIONS FOR COMMERCIAL RECOVERY PERMITS Miscellaneous §...

  1. 15 CFR 971.805 - Computation of time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... part or 15 CFR part 970, but when a time period expires on any of these days, that time period will be... ENVIRONMENTAL DATA SERVICE DEEP SEABED MINING REGULATIONS FOR COMMERCIAL RECOVERY PERMITS Miscellaneous §...

  2. 15 CFR 971.805 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... part or 15 CFR part 970, but when a time period expires on any of these days, that time period will be... ENVIRONMENTAL DATA SERVICE DEEP SEABED MINING REGULATIONS FOR COMMERCIAL RECOVERY PERMITS Miscellaneous §...

  3. 15 CFR 971.805 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... part or 15 CFR part 970, but when a time period expires on any of these days, that time period will be... ENVIRONMENTAL DATA SERVICE DEEP SEABED MINING REGULATIONS FOR COMMERCIAL RECOVERY PERMITS Miscellaneous §...

  4. Fault recovery for real-time, multi-tasking computer system

    NASA Technical Reports Server (NTRS)

    Hess, Richard (Inventor); Kelly, Gerald B. (Inventor); Rogers, Randy (Inventor); Stange, Kent A. (Inventor)

    2011-01-01

    System and methods for providing a recoverable real time multi-tasking computer system are disclosed. In one embodiment, a system comprises a real time computing environment, wherein the real time computing environment is adapted to execute one or more applications and wherein each application is time and space partitioned. The system further comprises a fault detection system adapted to detect one or more faults affecting the real time computing environment and a fault recovery system, wherein upon the detection of a fault the fault recovery system is adapted to restore a backup set of state variables.

  5. Automatic Exposure Control Systems Designed to Maintain Constant Image Noise: Effects on Computed Tomography Dose and Noise Relative to Clinically Accepted Technique Charts

    PubMed Central

    Favazza, Christopher P.; Yu, Lifeng; Leng, Shuai; Kofler, James M.; McCollough, Cynthia H.

    2015-01-01

    Objective To compare computed tomography dose and noise arising from use of an automatic exposure control (AEC) system designed to maintain constant image noise as patient size varies with clinically accepted technique charts and AEC systems designed to vary image noise. Materials and Methods A model was developed to describe tube current modulation as a function of patient thickness. Relative dose and noise values were calculated as patient width varied for AEC settings designed to yield constant or variable noise levels and were compared to empirically derived values used by our clinical practice. Phantom experiments were performed in which tube current was measured as a function of thickness using a constant-noise-based AEC system and the results were compared with clinical technique charts. Results For 12-, 20-, 28-, 44-, and 50-cm patient widths, the requirement of constant noise across patient size yielded relative doses of 5%, 14%, 38%, 260%, and 549% and relative noises of 435%, 267%, 163%, 61%, and 42%, respectively, as compared with our clinically used technique chart settings at each respective width. Experimental measurements showed that a constant noise–based AEC system yielded 175% relative noise for a 30-cm phantom and 206% relative dose for a 40-cm phantom compared with our clinical technique chart. Conclusions Automatic exposure control systems that prescribe constant noise as patient size varies can yield excessive noise in small patients and excessive dose in obese patients compared with clinically accepted technique charts. Use of noise-level technique charts and tube current limits can mitigate these effects. PMID:25938214

  6. Comparison of the Explicit Timing and Interspersal Interventions: Analysis of Problem Completion Rates, Student Preference, and Teacher Acceptability

    ERIC Educational Resources Information Center

    Rhymer, Katrina N.; Morgan, Sandra K.

    2005-01-01

    Explicit timing and interspersal interventions were investigated using a within-subjects design with 45 third-grade students. A control assignment consisted of subtraction of a two digit number from a two digit number (i.e., target problem) and served as a baseline. An explicit timing assignment consisted of similar problems as those for the…

  7. Quantum Computing Without Wavefunctions: Time-Dependent Density Functional Theory for Universal Quantum Computation

    PubMed Central

    Tempel, David G.; Aspuru-Guzik, Alán

    2012-01-01

    We prove that the theorems of TDDFT can be extended to a class of qubit Hamiltonians that are universal for quantum computation. The theorems of TDDFT applied to universal Hamiltonians imply that single-qubit expectation values can be used as the basic variables in quantum computation and information theory, rather than wavefunctions. From a practical standpoint this opens the possibility of approximating observables of interest in quantum computations directly in terms of single-qubit quantities (i.e. as density functionals). Additionally, we also demonstrate that TDDFT provides an exact prescription for simulating universal Hamiltonians with other universal Hamiltonians that have different, and possibly easier-to-realize two-qubit interactions. This establishes the foundations of TDDFT for quantum computation and opens the possibility of developing density functionals for use in quantum algorithms. PMID:22553483

  8. Quantum computing without wavefunctions: time-dependent density functional theory for universal quantum computation.

    PubMed

    Tempel, David G; Aspuru-Guzik, Alán

    2012-01-01

    We prove that the theorems of TDDFT can be extended to a class of qubit Hamiltonians that are universal for quantum computation. The theorems of TDDFT applied to universal Hamiltonians imply that single-qubit expectation values can be used as the basic variables in quantum computation and information theory, rather than wavefunctions. From a practical standpoint this opens the possibility of approximating observables of interest in quantum computations directly in terms of single-qubit quantities (i.e. as density functionals). Additionally, we also demonstrate that TDDFT provides an exact prescription for simulating universal Hamiltonians with other universal Hamiltonians that have different, and possibly easier-to-realize two-qubit interactions. This establishes the foundations of TDDFT for quantum computation and opens the possibility of developing density functionals for use in quantum algorithms. PMID:22553483

  9. 5 CFR 831.703 - Computation of annuities for part-time service.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 2 2010-01-01 2010-01-01 false Computation of annuities for part-time... part-time service. (a) Purpose. The computational method in this section shall be used to determine the annuity for an employee who has part-time service on or after April 7, 1986. (b) Definitions. In...

  10. 5 CFR 831.703 - Computation of annuities for part-time service.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 2 2011-01-01 2011-01-01 false Computation of annuities for part-time... part-time service. (a) Purpose. The computational method in this section shall be used to determine the annuity for an employee who has part-time service on or after April 7, 1986. (b) Definitions. In...

  11. A Computer Evolution in Teaching Undergraduate Time Series

    ERIC Educational Resources Information Center

    Hodgess, Erin M.

    2004-01-01

    In teaching undergraduate time series courses, we have used a mixture of various statistical packages. We have finally been able to teach all of the applied concepts within one statistical package; R. This article describes the process that we use to conduct a thorough analysis of a time series. An example with a data set is provided. We compare…

  12. COMPUTER-CONTROLLED, REAL-TIME AUTOMOBILE EMISSIONS MONITORING SYSTEM

    EPA Science Inventory

    A minicomputer controlled automotive emissions sampling and analysis system (the Real-Time System) was developed to determine vehicular modal emissions over various test cycles. This data acquisition system can sample real-time emissions at a rate of 10 samples/s. A buffer utiliz...

  13. Computer Modeling of Real-Time Dynamic Lighting

    NASA Technical Reports Server (NTRS)

    Maida, James C.; Pace, J.; Novak, J.; Russo, Dane M. (Technical Monitor)

    2000-01-01

    Space Station tasks involve procedures that are very complex and highly dependent on the availability of visual information. In many situations, cameras are used as tools to help overcome the visual and physical restrictions associated with space flight. However, these cameras are effected by the dynamic lighting conditions of space. Training for these is conditions is necessary. The current project builds on the findings of an earlier NRA funded project, which revealed improved performance by humans when trained with computer graphics and lighting effects such as shadows and glare.

  14. Axisymmetric Time-Dependent Computations of Expansion Tube Flow

    NASA Technical Reports Server (NTRS)

    Wilson, Gregory J.; Arnold, James O. (Technical Monitor)

    1994-01-01

    The goal of this work is to add insight about the flow within expansion tubes by using computational fluid dynamics. This is accomplished by comparing the results of axisymmetric numerical simulations with finite-rate chemistry to data from the HYPULSE expansion tube facility which was previously the NASA Langley expansion tube. The numerical simulations begin at the opening of the primary diaphragm and compute the flow throughout the whole facility and, thus, are able to follow and assess the effect of many of the flow features created during operation of the facility. One particular issue that will be investigated is the effect of boundary layer formation in the acceleration tube on the test gas volume and test gas conditions. Both laminar and turbulent boundary layers will be implemented. The effect of momentary shock reflection off the secondary diaphragm will also be investigated. There is concern that such a reflection will stagnate the test gas and create high levels of dissociated molecules. This is particularly important in propulsion experiments where a freestream composition different from flight conditions may influence ignition and burning data. Several different models of diaphragm rupture will be implemented in order to help understand the importance of this issue.

  15. Spurious fields in time domain computations of scattering problems

    NASA Technical Reports Server (NTRS)

    Kangro, Urve; Nicolaides, Roy

    1995-01-01

    In this paper two-dimensional electromagnetic scattering problems with a time-periodic incident field are considered. The scatterer is a perfect conductor, and an artificial boundary condition is used. The large time behavior of solutions, depending on (divergence-free) initial conditions, is characterized. It turns out that in addition to the expected time-periodic solution the limiting solution may also contain a spurious stationary field. The source of the stationary field is explained and equations describing it are obtained. Several avoidance strategies are discussed, and numerical comparisons of these techniques are given.

  16. 40 CFR 307.13 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... PLANNING, AND COMMUNITY RIGHT-TO-KNOW PROGRAMS COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND... time described or allowed in this part, except as otherwise provided, the day of the event from...

  17. Computational complexity of time-dependent density functional theory

    NASA Astrophysics Data System (ADS)

    Whitfield, J. D.; Yung, M.-H.; Tempel, D. G.; Boixo, S.; Aspuru-Guzik, A.

    2014-08-01

    Time-dependent density functional theory (TDDFT) is rapidly emerging as a premier method for solving dynamical many-body problems in physics and chemistry. The mathematical foundations of TDDFT are established through the formal existence of a fictitious non-interacting system (known as the Kohn-Sham system), which can reproduce the one-electron reduced probability density of the actual system. We build upon these works and show that on the interior of the domain of existence, the Kohn-Sham system can be efficiently obtained given the time-dependent density. We introduce a V-representability parameter which diverges at the boundary of the existence domain and serves to quantify the numerical difficulty of constructing the Kohn-Sham potential. For bounded values of V-representability, we present a polynomial time quantum algorithm to generate the time-dependent Kohn-Sham potential with controllable error bounds.

  18. The Comparative Readability of Six Subject Categories in Time/Newsweek Magazines: A Study of Media Acceptability.

    ERIC Educational Resources Information Center

    Fowler, Gilbert Len, Jr.; Smith, Edward J.

    The Flesch readability formula was used to analyze 192 100-word samples from selected matching issues of "Time" and "Newsweek." It was hypothesized that "immediate-reward" types of news, such as sports, social, and human interest events, would be significantly more readable (fewer syllables per 100 words and fewer words per sentence) than…

  19. Data Acceptance Criteria for Standardized Human-Associated Fecal Source Identification Quantitative Real-Time PCR Methods

    EPA Science Inventory

    There is a growing interest in the application of human-associated fecal sourceidentification quantitative real-time PCR (qPCR) technologies for water quality management. The transition from a research tool to a standardized protocol requires a high degree of confidence in data q...

  20. A strategy for reducing turnaround time in design optimization using a distributed computer system

    NASA Technical Reports Server (NTRS)

    Young, Katherine C.; Padula, Sharon L.; Rogers, James L.

    1988-01-01

    There is a need to explore methods for reducing lengthly computer turnaround or clock time associated with engineering design problems. Different strategies can be employed to reduce this turnaround time. One strategy is to run validated analysis software on a network of existing smaller computers so that portions of the computation can be done in parallel. This paper focuses on the implementation of this method using two types of problems. The first type is a traditional structural design optimization problem, which is characterized by a simple data flow and a complicated analysis. The second type of problem uses an existing computer program designed to study multilevel optimization techniques. This problem is characterized by complicated data flow and a simple analysis. The paper shows that distributed computing can be a viable means for reducing computational turnaround time for engineering design problems that lend themselves to decomposition. Parallel computing can be accomplished with a minimal cost in terms of hardware and software.

  1. Computer simulation of the thermal environment of large-scale integrated circuits - Computer time-saving techniques.

    NASA Technical Reports Server (NTRS)

    Thompson, R. R.; Blum, H. A.

    1971-01-01

    This paper is concerned with the computer costs for both the steady-state and transient thermal responses of large-scale integrated circuits (LSI) when metal is present within the substrate. For the more cost-sensitive transient case, an extrapolation technique for computer time savings is compared with the accuracy loss in this study. This approach could be useful for design-cost planning.

  2. 40 CFR 22.7 - Computation and extension of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... served by first class mail or commercial delivery service, but not by overnight or same-day delivery, 5... provided, the day of the event from which the designated period begins to run shall not be included... or Federal holiday, the stated time period shall be extended to include the next business day....

  3. 40 CFR 22.7 - Computation and extension of time.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... served by first class mail or commercial delivery service, but not by overnight or same-day delivery, 5... provided, the day of the event from which the designated period begins to run shall not be included... or Federal holiday, the stated time period shall be extended to include the next business day....

  4. 40 CFR 22.7 - Computation and extension of time.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... served by first class mail or commercial delivery service, but not by overnight or same-day delivery, 5... provided, the day of the event from which the designated period begins to run shall not be included... or Federal holiday, the stated time period shall be extended to include the next business day....

  5. 40 CFR 22.7 - Computation and extension of time.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... served by first class mail or commercial delivery service, but not by overnight or same-day delivery, 5... provided, the day of the event from which the designated period begins to run shall not be included... or Federal holiday, the stated time period shall be extended to include the next business day....

  6. 40 CFR 22.7 - Computation and extension of time.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... served by first class mail or commercial delivery service, but not by overnight or same-day delivery, 5... provided, the day of the event from which the designated period begins to run shall not be included... or Federal holiday, the stated time period shall be extended to include the next business day....

  7. 10 CFR 1003.5 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... written order is transmitted by verbal communication, the written order shall be served as soon thereafter... days, the period of time shall begin to run upon actual notice of such order, whether by verbal or written communication, to the person directly affected, and shall run without interruption,...

  8. 42 CFR 93.509 - Computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... EFFECTS STUDIES OF HAZARDOUS SUBSTANCES RELEASES AND FACILITIES PUBLIC HEALTH SERVICE POLICIES ON RESEARCH MISCONDUCT Opportunity To Contest ORI Findings of Research Misconduct and HHS Administrative Actions Hearing... respondent's request for a hearing, the ALJ may modify the time for the filing of any document or...

  9. 42 CFR 93.509 - Computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... EFFECTS STUDIES OF HAZARDOUS SUBSTANCES RELEASES AND FACILITIES PUBLIC HEALTH SERVICE POLICIES ON RESEARCH MISCONDUCT Opportunity To Contest ORI Findings of Research Misconduct and HHS Administrative Actions Hearing... respondent's request for a hearing, the ALJ may modify the time for the filing of any document or...

  10. Effects of husk and harvest time on carotenoid content and acceptability of roasted fresh cobs of orange maize hybrids

    PubMed Central

    Alamu, Oladeji E; Menkir, Abebe; Maziya-Dixon, Bussie; Olaofe, Olorunfemi

    2014-01-01

    Vitamin A deficiency (VAD) is a major public health problem in many developing countries. Orange maize is preferred as green maize and consumed roasted on the cob, especially in Nigeria. This research work was to evaluate the effects of harvest time and husk on the carotenoid contents and sensory properties of roasted orange maize hybrids. The results showed that husk (roasting forms) and harvesting time had significant effects (P ≤ 0.001) on the carotenoids and the sensory properties. There was general increase in β-carotene and provitamin A (PVA) values as the harvesting time increases. The β-carotene and PVA values for roasted orange maize hybrids with husk were higher than those for roasted without husk. Hybrid 5 had the highest β-carotene concentration and PVA value at 27 days after pollination (DAP) and 34DAP when unprocessed and roasted without husk. This information can help researchers in choosing proper roasting methods to increase the retention of high levels of β-carotene and PVA in orange maize that can be delivered to consumers through nutrition education. PMID:25493200

  11. Effects of husk and harvest time on carotenoid content and acceptability of roasted fresh cobs of orange maize hybrids.

    PubMed

    Alamu, Oladeji E; Menkir, Abebe; Maziya-Dixon, Bussie; Olaofe, Olorunfemi

    2014-11-01

    Vitamin A deficiency (VAD) is a major public health problem in many developing countries. Orange maize is preferred as green maize and consumed roasted on the cob, especially in Nigeria. This research work was to evaluate the effects of harvest time and husk on the carotenoid contents and sensory properties of roasted orange maize hybrids. The results showed that husk (roasting forms) and harvesting time had significant effects (P ≤ 0.001) on the carotenoids and the sensory properties. There was general increase in β-carotene and provitamin A (PVA) values as the harvesting time increases. The β-carotene and PVA values for roasted orange maize hybrids with husk were higher than those for roasted without husk. Hybrid 5 had the highest β-carotene concentration and PVA value at 27 days after pollination (DAP) and 34DAP when unprocessed and roasted without husk. This information can help researchers in choosing proper roasting methods to increase the retention of high levels of β-carotene and PVA in orange maize that can be delivered to consumers through nutrition education. PMID:25493200

  12. American Recovery and Reinvestment Act of 2009. Interim Report on Customer Acceptance, Retention, and Response to Time-Based Rates from the Consumer Behavior Studies

    SciTech Connect

    Cappers, Peter; Hans, Liesel; Scheer, Richard

    2015-06-01

    Time-based rate programs1, enabled by utility investments in advanced metering infrastructure (AMI), are increasingly being considered by utilities as tools to reduce peak demand and enable customers to better manage consumption and costs. There are several customer systems that are relatively new to the marketplace and have the potential for improving the effectiveness of these programs, including in-home displays (IHDs), programmable communicating thermostats (PCTs), and web portals. Policy and decision makers are interested in more information about customer acceptance, retention, and response before moving forward with expanded deployments of AMI-enabled new rates and technologies. Under the Smart Grid Investment Grant Program (SGIG), the U.S. Department of Energy (DOE) partnered with several utilities to conduct consumer behavior studies (CBS). The goals involved applying randomized and controlled experimental designs for estimating customer responses more precisely and credibly to advance understanding of time-based rates and customer systems, and provide new information for improving program designs, implementation strategies, and evaluations. The intent was to produce more robust and credible analysis of impacts, costs, benefits, and lessons learned and assist utility and regulatory decision makers in evaluating investment opportunities involving time-based rates. To help achieve these goals, DOE developed technical guidelines to help the CBS utilities estimate customer acceptance, retention, and response more precisely.

  13. Wake force computation in the time domain for long structures

    SciTech Connect

    Bane, K.; Weiland, T.

    1983-07-01

    One is often interested in calculating the wake potentials for short bunches in long structures using TBCI. For ultra-relativistic particles it is sufficient to solve for the fields only over a window containing the bunch and moving along with it. This technique reduces both the memory and the running time required by a factor that equals the ratio of the structure length to the window length. For example, for a bunch with sigma/sub z/ of one picosecond traversing a single SLAC cell this improvement factor is 15. It is thus possible to solve for the wakefields in very long structures: for a given problem, increasing the structure length will not change the memory required while only adding linearly to the CPU time needed.

  14. HOPE: Just-in-time Python compiler for astrophysical computations

    NASA Astrophysics Data System (ADS)

    Akeret, Joel; Gamper, Lukas; Amara, Adam; Refregier, Alexandre

    2014-11-01

    HOPE is a specialized Python just-in-time (JIT) compiler designed for numerical astrophysical applications. HOPE focuses on a subset of the language and is able to translate Python code into C++ while performing numerical optimization on mathematical expressions at runtime. To enable the JIT compilation, the user only needs to add a decorator to the function definition. By using HOPE, the user benefits from being able to write common numerical code in Python while getting the performance of compiled implementation.

  15. 29 CFR 4000.41 - What are these computation-of-time rules about?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 9 2011-07-01 2011-07-01 false What are these computation-of-time rules about? 4000.41 Section 4000.41 Labor Regulations Relating to Labor (Continued) PENSION BENEFIT GUARANTY CORPORATION... these computation-of-time rules about? The rules in this subpart D of part 4000 tell you how to...

  16. Mimicking time evolution within a quantum ground state: Ground-state quantum computation, cloning, and teleportation

    SciTech Connect

    Mizel, Ari

    2004-07-01

    Ground-state quantum computers mimic quantum-mechanical time evolution within the amplitudes of a time-independent quantum state. We explore the principles that constrain this mimicking. A no-cloning argument is found to impose strong restrictions. It is shown, however, that there is flexibility that can be exploited using quantum teleportation methods to improve ground-state quantum computer design.

  17. 14 CFR 13.85 - Filing, service and computation of time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Filing, service and computation of time. 13.85 Section 13.85 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... Transportation Act § 13.85 Filing, service and computation of time. Filing and service of documents under...

  18. 14 CFR 13.85 - Filing, service and computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Filing, service and computation of time. 13.85 Section 13.85 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... Transportation Act § 13.85 Filing, service and computation of time. Filing and service of documents under...

  19. 12 CFR 516.10 - How does OTS compute time periods under this part?

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 5 2011-01-01 2011-01-01 false How does OTS compute time periods under this part? 516.10 Section 516.10 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY APPLICATION PROCESSING PROCEDURES § 516.10 How does OTS compute time periods under this part? In...

  20. 12 CFR 516.10 - How does OTS compute time periods under this part?

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 12 Banks and Banking 5 2010-01-01 2010-01-01 false How does OTS compute time periods under this part? 516.10 Section 516.10 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY APPLICATION PROCESSING PROCEDURES § 516.10 How does OTS compute time periods under this part? In...

  1. 12 CFR 516.10 - How does OTS compute time periods under this part?

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 6 2013-01-01 2012-01-01 true How does OTS compute time periods under this part? 516.10 Section 516.10 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY APPLICATION PROCESSING PROCEDURES § 516.10 How does OTS compute time periods under this part? In...

  2. 12 CFR 516.10 - How does OTS compute time periods under this part?

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 6 2014-01-01 2012-01-01 true How does OTS compute time periods under this part? 516.10 Section 516.10 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY APPLICATION PROCESSING PROCEDURES § 516.10 How does OTS compute time periods under this part? In...

  3. 12 CFR 516.10 - How does OTS compute time periods under this part?

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 6 2012-01-01 2012-01-01 false How does OTS compute time periods under this part? 516.10 Section 516.10 Banks and Banking OFFICE OF THRIFT SUPERVISION, DEPARTMENT OF THE TREASURY APPLICATION PROCESSING PROCEDURES § 516.10 How does OTS compute time periods under this part? In...

  4. 29 CFR 4011.9 - Method and date of issuance of notice; computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Method and date of issuance of notice; computation of time... CORPORATION CERTAIN REPORTING AND DISCLOSURE REQUIREMENTS DISCLOSURE TO PARTICIPANTS § 4011.9 Method and date of issuance of notice; computation of time. (a) Method of issuance. The PBGC applies the rules...

  5. 29 CFR 4219.19 - Method and date of issuance; computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Method and date of issuance; computation of time. 4219.19... Redetermination of Withdrawal Liability Upon Mass Withdrawal § 4219.19 Method and date of issuance; computation of time. The PBGC applies the rules in subpart B of part 4000 of this chapter to determine...

  6. 14 CFR 13.85 - Filing, service and computation of time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Filing, service and computation of time. 13.85 Section 13.85 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... Transportation Act § 13.85 Filing, service and computation of time. Filing and service of documents under...

  7. 14 CFR 13.85 - Filing, service and computation of time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Filing, service and computation of time. 13.85 Section 13.85 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... Transportation Act § 13.85 Filing, service and computation of time. Filing and service of documents under...

  8. 22 CFR 1429.21 - Computation of time for filing papers.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 22 Foreign Relations 2 2014-04-01 2014-04-01 false Computation of time for filing papers. 1429.21... MISCELLANEOUS AND GENERAL REQUIREMENTS General Requirements § 1429.21 Computation of time for filing papers. In... subchapter requires the filing of any paper, such document must be received by the Board or the officer...

  9. Intercommunications in Real Time, Redundant, Distributed Computer System

    NASA Technical Reports Server (NTRS)

    Zanger, H.

    1980-01-01

    An investigation into the applicability of fiber optic communication techniques to real time avionic control systems, in particular the total automatic flight control system used for the VSTOL aircraft is presented. The system consists of spatially distributed microprocessors. The overall control function is partitioned to yield a unidirectional data flow between the processing elements (PE). System reliability is enhanced by the use of triple redundancy. Some general overall system specifications are listed here to provide the necessary background for the requirements of the communications system.

  10. A Microplate Format Assay for Real-Time Screening for New Aldolases that Accept Aryl-Substituted Acceptor Substrates.

    PubMed

    Ma, Huan; Enugala, Thilak Reddy; Widersten, Mikael

    2015-12-01

    Aldolases are potentially important biocatalysts for asymmetric synthesis of polyhydroxylated compounds. Fructose 6-phosphate aldolase (FSA) is of particular interest by virtue of its unusually relaxed dependency on phosphorylated substrates. FSA has been reported to be a promising catalyst of aldol addition involving aryl-substituted acceptors such as phenylacetaldehyde that can react with donor ketones such as hydroxyacetone. Improvement of the low intrinsic activity with bulky acceptor substrates of this type is of great interest but has been hampered by the lack of powerful screening protocols applicable in directed evolution strategies. Here we present a new screen allowing for direct spectrophotometric recording of retro-aldol cleavage. The assay utilizes an aldehyde reductase produced in vitro by directed evolution; it reduces the aldehyde product formed after cleavage of the aldol by FSA. The assay is suitable both for steady-state enzyme kinetics and for real-time activity screening in a 96-well format. PMID:26449620

  11. Computer Response Time Measurements of Mood, Fatigue and Symptom Scale Items: Implications for Scale Response Time Uses.

    ERIC Educational Resources Information Center

    Ryman, David H.; And Others

    1988-01-01

    Describes study conducted with U.S. Marine Corps enlisted personnel to measure response time to computer-administered questionnaire items, and to evaluate how measurement of response time might be useful in various research areas. Topics addressed include mood states; the occurrence of straight lining; and experimental effects of sleep loss and…

  12. 7 CFR 900.69 - Filing; service; extensions of time; effective date of filing; and computation of time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Filing; service; extensions of time; effective date of filing; and computation of time. 900.69 Section 900.69 Agriculture Regulations of the Department of... Petitions To Modify or To Be Exempted From Marketing Orders § 900.69 Filing; service; extensions of...

  13. Reduction of reconstruction time for time-resolved spiral 3D contrast-enhanced magnetic resonance angiography using parallel computing.

    PubMed

    Kressler, Bryan; Spincemaille, Pascal; Prince, Martin R; Wang, Yi

    2006-09-01

    Time-resolved 3D MRI with high spatial and temporal resolution can be achieved using spiral sampling and sliding-window reconstruction. Image reconstruction is computationally intensive because of the need for data regridding, a large number of temporal phases, and multiple RF receiver coils. Inhomogeneity blurring correction for spiral sampling further increases the computational work load by an order of magnitude, hindering the clinical utility of spiral trajectories. In this work the reconstruction time is reduced by a factor of >40 compared to reconstruction using a single processor. This is achieved by using a cluster of 32 commercial off-the-shelf computers, commodity networking hardware, and readily available software. The reconstruction system is demonstrated for time-resolved spiral contrast-enhanced (CE) peripheral MR angiography (MRA), and a reduction of reconstruction time from 80 min to 1.8 min is achieved. PMID:16892189

  14. The expanded role of computers in Space Station Freedom real-time operations

    NASA Technical Reports Server (NTRS)

    Crawford, R. Paul; Cannon, Kathleen V.

    1990-01-01

    The challenges that NASA and its international partners face in their real-time operation of the Space Station Freedom necessitate an increased role on the part of computers. In building the operational concepts concerning the role of the computer, the Space Station program is using lessons learned experience from past programs, knowledge of the needs of future space programs, and technical advances in the computer industry. The computer is expected to contribute most significantly in real-time operations by forming a versatile operating architecture, a responsive operations tool set, and an environment that promotes effective and efficient utilization of Space Station Freedom resources.

  15. Accuracy and computational efficiency of real-time subspace propagation schemes for the time-dependent density functional theory

    NASA Astrophysics Data System (ADS)

    Russakoff, Arthur; Li, Yonghui; He, Shenglai; Varga, Kalman

    2016-05-01

    Time-dependent Density Functional Theory (TDDFT) has become successful for its balance of economy and accuracy. However, the application of TDDFT to large systems or long time scales remains computationally prohibitively expensive. In this paper, we investigate the numerical stability and accuracy of two subspace propagation methods to solve the time-dependent Kohn-Sham equations with finite and periodic boundary conditions. The bases considered are the Lánczos basis and the adiabatic eigenbasis. The results are compared to a benchmark fourth-order Taylor expansion of the time propagator. Our results show that it is possible to use larger time steps with the subspace methods, leading to computational speedups by a factor of 2-3 over Taylor propagation. Accuracy is found to be maintained for certain energy regimes and small time scales.

  16. Accuracy and computational efficiency of real-time subspace propagation schemes for the time-dependent density functional theory.

    PubMed

    Russakoff, Arthur; Li, Yonghui; He, Shenglai; Varga, Kalman

    2016-05-28

    Time-dependent Density Functional Theory (TDDFT) has become successful for its balance of economy and accuracy. However, the application of TDDFT to large systems or long time scales remains computationally prohibitively expensive. In this paper, we investigate the numerical stability and accuracy of two subspace propagation methods to solve the time-dependent Kohn-Sham equations with finite and periodic boundary conditions. The bases considered are the Lánczos basis and the adiabatic eigenbasis. The results are compared to a benchmark fourth-order Taylor expansion of the time propagator. Our results show that it is possible to use larger time steps with the subspace methods, leading to computational speedups by a factor of 2-3 over Taylor propagation. Accuracy is found to be maintained for certain energy regimes and small time scales. PMID:27250297

  17. 45 CFR 156.929 - Computation of time and extensions of time.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... HEALTH CARE ACCESS HEALTH INSURANCE ISSUER STANDARDS UNDER THE AFFORDABLE CARE ACT, INCLUDING STANDARDS... period of time, the time begins with the day following the act, event, or default and includes the...

  18. Architecture for event-driven real-time distributed computer systems

    SciTech Connect

    McDonald, J.E.

    1983-01-01

    The author describes a proposed preliminary system design that includes hardware and software for real-time distributed computer systems. This new system is appropriate as a digital avionics architecture or as a real-time multi-computer simulation system using a mixture of computers, mainframes to micros. The hardware contains a network that employs high-speed serial data transmission concepts in emulating a multicomputer shared memory system. The distributed multicomputer system then capitalizes on the attributes of the hardware by structuring the real-time software as the data-driven input-output system. The real-time software executes only on demand and not synchronously as in conventional real-time systems. Background information concerning multi-computer systems using serial and parallel data transmission networks is given. This information supports the design rationale of the proposed hardware system which is basically a technology blend of conventional serial and parallel transmission schemes. 2 references.

  19. An Approach to Integrate a Space-Time GIS Data Model with High Performance Computers

    SciTech Connect

    Wang, Dali; Zhao, Ziliang; Shaw, Shih-Lung

    2011-01-01

    In this paper, we describe an approach to integrate a Space-Time GIS data model on a high performance computing platform. The Space-Time GIS data model has been developed on a desktop computing environment. We use the Space-Time GIS data model to generate GIS module, which organizes a series of remote sensing data. We are in the process of porting the GIS module into an HPC environment, in which the GIS modules handle large dataset directly via parallel file system. Although it is an ongoing project, authors hope this effort can inspire further discussions on the integration of GIS on high performance computing platforms.

  20. Cone-beam computed tomography: Time to move from ALARA to ALADA

    PubMed Central

    Jaju, Sushma P.

    2015-01-01

    Cone-beam computed tomography (CBCT) is routinely recommended for dental diagnosis and treatment planning. CBCT exposes patients to less radiation than does conventional CT. Still, lack of proper education among dentists and specialists is resulting in improper referral for CBCT. In addition, aiming to generate high-quality images, operators may increase the radiation dose, which can expose the patient to unnecessary risk. This letter advocates appropriate radiation dosing during CBCT to the benefit of both patients and dentists, and supports moving from the concept of "as low as reasonably achievable" (ALARA) to "as low as diagnostically acceptable" (ALADA). PMID:26730375

  1. Cone-beam computed tomography: Time to move from ALARA to ALADA.

    PubMed

    Jaju, Prashant P; Jaju, Sushma P

    2015-12-01

    Cone-beam computed tomography (CBCT) is routinely recommended for dental diagnosis and treatment planning. CBCT exposes patients to less radiation than does conventional CT. Still, lack of proper education among dentists and specialists is resulting in improper referral for CBCT. In addition, aiming to generate high-quality images, operators may increase the radiation dose, which can expose the patient to unnecessary risk. This letter advocates appropriate radiation dosing during CBCT to the benefit of both patients and dentists, and supports moving from the concept of "as low as reasonably achievable" (ALARA) to "as low as diagnostically acceptable" (ALADA). PMID:26730375

  2. A study of workstation computational performance for real-time flight simulation

    NASA Technical Reports Server (NTRS)

    Maddalon, Jeffrey M.; Cleveland, Jeff I., II

    1995-01-01

    With recent advances in microprocessor technology, some have suggested that modern workstations provide enough computational power to properly operate a real-time simulation. This paper presents the results of a computational benchmark, based on actual real-time flight simulation code used at Langley Research Center, which was executed on various workstation-class machines. The benchmark was executed on different machines from several companies including: CONVEX Computer Corporation, Cray Research, Digital Equipment Corporation, Hewlett-Packard, Intel, International Business Machines, Silicon Graphics, and Sun Microsystems. The machines are compared by their execution speed, computational accuracy, and porting effort. The results of this study show that the raw computational power needed for real-time simulation is now offered by workstations.

  3. A Modular Environment for Geophysical Inversion and Run-time Autotuning using Heterogeneous Computing Systems

    NASA Astrophysics Data System (ADS)

    Myre, Joseph M.

    Heterogeneous computing systems have recently come to the forefront of the High-Performance Computing (HPC) community's interest. HPC computer systems that incorporate special purpose accelerators, such as Graphics Processing Units (GPUs), are said to be heterogeneous. Large scale heterogeneous computing systems have consistently ranked highly on the Top500 list since the beginning of the heterogeneous computing trend. By using heterogeneous computing systems that consist of both general purpose processors and special- purpose accelerators, the speed and problem size of many simulations could be dramatically increased. Ultimately this results in enhanced simulation capabilities that allows, in some cases for the first time, the execution of parameter space and uncertainty analyses, model optimizations, and other inverse modeling techniques that are critical for scientific discovery and engineering analysis. However, simplifying the usage and optimization of codes for heterogeneous computing systems remains a challenge. This is particularly true for scientists and engineers for whom understanding HPC architectures and undertaking performance analysis may not be primary research objectives. To enable scientists and engineers to remain focused on their primary research objectives, a modular environment for geophysical inversion and run-time autotuning on heterogeneous computing systems is presented. This environment is composed of three major components: 1) CUSH---a framework for reducing the complexity of programming heterogeneous computer systems, 2) geophysical inversion routines which can be used to characterize physical systems, and 3) run-time autotuning routines designed to determine configurations of heterogeneous computing systems in an attempt to maximize the performance of scientific and engineering codes. Using three case studies, a lattice-Boltzmann method, a non-negative least squares inversion, and a finite-difference fluid flow method, it is shown that

  4. Online Operation Guidance of Computer System Used in Real-Time Distance Education Environment

    ERIC Educational Resources Information Center

    He, Aiguo

    2011-01-01

    Computer system is useful for improving real time and interactive distance education activities. Especially in the case that a large number of students participate in one distance lecture together and every student uses their own computer to share teaching materials or control discussions over the virtual classrooms. The problem is that within…

  5. Computer Networks for Real-Time Written Interaction in the Writing Classroom: An Annotated Bibliography.

    ERIC Educational Resources Information Center

    Peyton, Joy Kreeft

    1989-01-01

    Provides annotated citations to articles, research reports, resources guides, and a newsletter about the use of computer networks for real-time written interaction in writing classrooms. Notes that these annotations offer a broad and varied introduction to computer networking in the writing classroom. (KEH)

  6. LIBRARY INFORMATION PROCESSING USING AN ON-LINE, REAL-TIME COMPUTER SYSTEM.

    ERIC Educational Resources Information Center

    HOLZBAUR, FREDERICK W.; FARRIS, EUGENE H.

    DIRECT MAN-MACHINE COMMUNICATION IS NOW POSSIBLE THROUGH ON-LINE, REAL-TIME TYPEWRITER TERMINALS DIRECTLY CONNECTED TO COMPUTERS. THESE TERMINAL SYSTEMS PERMIT THE OPERATOR, WHETHER ORDER CLERK, CATALOGER, REFERENCE LIBRARIAN OR TYPIST, TO INTERACT WITH THE COMPUTER IN MANIPULATING DATA STORED WITHIN IT. THE IBM ADMINISTRATIVE TERMINAL SYSTEM…

  7. Acceptance speech.

    PubMed

    Carpenter, M

    1994-01-01

    In Bangladesh, the assistant administrator of USAID gave an acceptance speech at an awards ceremony on the occasion of the 25th anniversary of oral rehydration solution (ORS). The ceremony celebrated the key role of the International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR,B) in the discovery of ORS. Its research activities over the last 25 years have brought ORS to every village in the world, preventing more than a million deaths each year. ORS is the most important medical advance of the 20th century. It is affordable and client-oriented, a true appropriate technology. USAID has provided more than US$ 40 million to ICDDR,B for diarrheal disease and measles research, urban and rural applied family planning and maternal and child health research, and vaccine development. ICDDR,B began as the relatively small Cholera Research Laboratory and has grown into an acclaimed international center for health, family planning, and population research. It leads the world in diarrheal disease research. ICDDR,B is the leading center for applied health research in South Asia. It trains public health specialists from around the world. The government of Bangladesh and the international donor community have actively joined in support of ICDDR,B. The government applies the results of ICDDR,B research to its programs to improve the health and well-being of Bangladeshis. ICDDR,B now also studies acute respiratory diseases and measles. Population and health comprise 1 of USAID's 4 strategic priorities, the others being economic growth, environment, and democracy, USAID promotes people's participation in these 4 areas and in the design and implementation of development projects. USAID is committed to the use and improvement of ORS and to complementary strategies that further reduce diarrhea-related deaths. Continued collaboration with a strong user perspective and integrated services will lead to sustainable development. PMID:12345470

  8. Acceptance speech.

    PubMed

    Yusuf, C K

    1994-01-01

    I am proud and honored to accept this award on behalf of the Government of Bangladesh, and the millions of Bangladeshi children saved by oral rehydration solution. The Government of Bangladesh is grateful for this recognition of its commitment to international health and population research and cost-effective health care for all. The Government of Bangladesh has already made remarkable strides forward in the health and population sector, and this was recognized in UNICEF's 1993 "State of the World's Children". The national contraceptive prevalence rate, at 40%, is higher than that of many developed countries. It is appropriate that Bangladesh, where ORS was discovered, has the largest ORS production capacity in the world. It was remarkable that after the devastating cyclone in 1991, the country was able to produce enough ORS to meet the needs and remain self-sufficient. Similarly, Bangladesh has one of the most effective, flexible and efficient control of diarrheal disease and epidemic response program in the world. Through the country, doctors have been trained in diarrheal disease management, and stores of ORS are maintained ready for any outbreak. Despite grim predictions after the 1991 cyclone and the 1993 floods, relatively few people died from diarrheal disease. This is indicative of the strength of the national program. I want to take this opportunity to acknowledge the contribution of ICDDR, B and the important role it plays in supporting the Government's efforts in the health and population sector. The partnership between the Government of Bangladesh and ICDDR, B has already borne great fruit, and I hope and believe that it will continue to do so for many years in the future. Thank you. PMID:12345479

  9. The New Screen Time: Computers, Tablets, and Smartphones Enter the Equation

    ERIC Educational Resources Information Center

    Wiles, Bradford B.; Schachtner, Laura; Pentz, Julie L.

    2016-01-01

    Emerging technologies attract children and push parents' and caregivers' abilities to attend to their families. This article presents recommendations related to the new version of screen time, which includes time with computers, tablets, and smartphones. Recommendations are provided for screen time for very young children and those in middle and…

  10. Decreasing Transition Times in Elementary School Classrooms: Using Computer-Assisted Instruction to Automate Intervention Components

    ERIC Educational Resources Information Center

    Hine, Jeffrey F.; Ardoin, Scott P.; Foster, Tori E.

    2015-01-01

    Research suggests that students spend a substantial amount of time transitioning between classroom activities, which may reduce time spent academically engaged. This study used an ABAB design to evaluate the effects of a computer-assisted intervention that automated intervention components previously shown to decrease transition times. We examined…

  11. An Assessment of Security Vulnerabilities Comprehension of Cloud Computing Environments: A Quantitative Study Using the Unified Theory of Acceptance and Use

    ERIC Educational Resources Information Center

    Venkatesh, Vijay P.

    2013-01-01

    The current computing landscape owes its roots to the birth of hardware and software technologies from the 1940s and 1950s. Since then, the advent of mainframes, miniaturized computing, and internetworking has given rise to the now prevalent cloud computing era. In the past few months just after 2010, cloud computing adoption has picked up pace…

  12. Computational Methods for Stability and Control (COMSAC): The Time Has Come

    NASA Technical Reports Server (NTRS)

    Hall, Robert M.; Biedron, Robert T.; Ball, Douglas N.; Bogue, David R.; Chung, James; Green, Bradford E.; Grismer, Matthew J.; Brooks, Gregory P.; Chambers, Joseph R.

    2005-01-01

    Powerful computational fluid dynamics (CFD) tools have emerged that appear to offer significant benefits as an adjunct to the experimental methods used by the stability and control community to predict aerodynamic parameters. The decreasing costs for and increasing availability of computing hours are making these applications increasingly viable as time goes on and the cost of computing continues to drop. This paper summarizes the efforts of four organizations to utilize high-end computational fluid dynamics (CFD) tools to address the challenges of the stability and control arena. General motivation and the backdrop for these efforts will be summarized as well as examples of current applications.

  13. PUREX SAMCONS uninterruptible power supply (UPS) acceptance test report

    SciTech Connect

    Blackaby, W.B.

    1997-10-07

    This Acceptance Test Report for the PUREX Surveillance and Monitoring and Control System (SAMCONS) Uninterruptible Power Supply (UPS) Acceptance Test Procedure validates the operation of the UPS, all alarming and display functions and the ability of the UPS to supply power to the SAMCONS as designed. The proper installation of the PUREX SAMCONS Trailer UPS components and wiring will be systematically evaluated by performance of this procedure. Proper operation of the SAMCONS computer UPS will be verified by performance of a timed functional load test, and verification of associated alarms and trouble indications. This test procedure will be performed in the SAMCONS Trailer and will include verification of receipt of alarms at the SAMCONS computer stations. This test may be performed at any time after the completion of HNF-SD-CP-ATP-083, PUREX Surveillance and Monitoring and Control System (SAMCONS) Acceptance Test Procedure, when computer display and alarm functions have been proven to operate correctly.

  14. Guidelines and Procedures for Computing Time-Series Suspended-Sediment Concentrations and Loads from In-Stream Turbidity-Sensor and Streamflow Data

    USGS Publications Warehouse

    Rasmussen, Patrick P.; Gray, John R.; Glysson, G. Douglas; Ziegler, Andrew C.

    2009-01-01

    In-stream continuous turbidity and streamflow data, calibrated with measured suspended-sediment concentration data, can be used to compute a time series of suspended-sediment concentration and load at a stream site. Development of a simple linear (ordinary least squares) regression model for computing suspended-sediment concentrations from instantaneous turbidity data is the first step in the computation process. If the model standard percentage error (MSPE) of the simple linear regression model meets a minimum criterion, this model should be used to compute a time series of suspended-sediment concentrations. Otherwise, a multiple linear regression model using paired instantaneous turbidity and streamflow data is developed and compared to the simple regression model. If the inclusion of the streamflow variable proves to be statistically significant and the uncertainty associated with the multiple regression model results in an improvement over that for the simple linear model, the turbidity-streamflow multiple linear regression model should be used to compute a suspended-sediment concentration time series. The computed concentration time series is subsequently used with its paired streamflow time series to compute suspended-sediment loads by standard U.S. Geological Survey techniques. Once an acceptable regression model is developed, it can be used to compute suspended-sediment concentration beyond the period of record used in model development with proper ongoing collection and analysis of calibration samples. Regression models to compute suspended-sediment concentrations are generally site specific and should never be considered static, but they represent a set period in a continually dynamic system in which additional data will help verify any change in sediment load, type, and source.

  15. Towards Real-Time High Performance Computing For Power Grid Analysis

    SciTech Connect

    Hui, Peter SY; Lee, Barry; Chikkagoudar, Satish

    2012-11-16

    Real-time computing has traditionally been considered largely in the context of single-processor and embedded systems, and indeed, the terms real-time computing, embedded systems, and control systems are often mentioned in closely related contexts. However, real-time computing in the context of multinode systems, specifically high-performance, cluster-computing systems, remains relatively unexplored. Imposing real-time constraints on a parallel (cluster) computing environment introduces a variety of challenges with respect to the formal verification of the system's timing properties. In this paper, we give a motivating example to demonstrate the need for such a system--- an application to estimate the electromechanical states of the power grid--- and we introduce a formal method for performing verification of certain temporal properties within a system of parallel processes. We describe our work towards a full real-time implementation of the target application--- namely, our progress towards extracting a key mathematical kernel from the application, the formal process by which we analyze the intricate timing behavior of the processes on the cluster, as well as timing measurements taken on our test cluster to demonstrate use of these concepts.

  16. End points for adjuvant therapy trials: has the time come to accept disease-free survival as a surrogate end point for overall survival?

    PubMed

    Gill, Sharlene; Sargent, Daniel

    2006-06-01

    The intent of adjuvant therapy is to eradicate micro-metastatic residual disease following curative resection with the goal of preventing or delaying recurrence. The time-honored standard for demonstrating efficacy of new adjuvant therapies is an improvement in overall survival (OS). This typically requires phase III trials of large sample size with lengthy follow-up. With the intent of reducing the cost and time of completing such trials, there is considerable interest in developing alternative or surrogate end points. A surrogate end point may be employed as a substitute to directly assess the effects of an intervention on an already accepted clinical end point such as mortality. When used judiciously, surrogate end points can accelerate the evaluation of new therapies, resulting in the more timely dissemination of effective therapies to patients. The current review provides a perspective on the suitability and validity of disease-free survival (DFS) as an alternative end point for OS. Criteria for establishing surrogacy and the advantages and limitations associated with the use of DFS as a primary end point in adjuvant clinical trials and as the basis for approval of new adjuvant therapies are discussed. PMID:16794241

  17. Application of special-purpose digital computers to rotorcraft real-time simulation

    NASA Technical Reports Server (NTRS)

    Mackie, D. B.; Michelson, S.

    1978-01-01

    The use of an array processor as a computational element in rotorcraft real-time simulation is studied. A multilooping scheme was considered in which the rotor would loop over its calculations a number of time while the remainder of the model cycled once on a host computer. To prove that such a method would realistically simulate rotorcraft, a FORTRAN program was constructed to emulate a typical host-array processor computing configuration. The multilooping of an expanded rotor model, which included appropriate kinematic equations, resulted in an accurate and stable simulation.

  18. A computational approach to real-time image processing for serial time-encoded amplified microscopy

    NASA Astrophysics Data System (ADS)

    Oikawa, Minoru; Hiyama, Daisuke; Hirayama, Ryuji; Hasegawa, Satoki; Endo, Yutaka; Sugie, Takahisa; Tsumura, Norimichi; Kuroshima, Mai; Maki, Masanori; Okada, Genki; Lei, Cheng; Ozeki, Yasuyuki; Goda, Keisuke; Shimobaba, Tomoyoshi

    2016-03-01

    High-speed imaging is an indispensable technique, particularly for identifying or analyzing fast-moving objects. The serial time-encoded amplified microscopy (STEAM) technique was proposed to enable us to capture images with a frame rate 1,000 times faster than using conventional methods such as CCD (charge-coupled device) cameras. The application of this high-speed STEAM imaging technique to a real-time system, such as flow cytometry for a cell-sorting system, requires successively processing a large number of captured images with high throughput in real time. We are now developing a high-speed flow cytometer system including a STEAM camera. In this paper, we describe our approach to processing these large amounts of image data in real time. We use an analog-to-digital converter that has up to 7.0G samples/s and 8-bit resolution for capturing the output voltage signal that involves grayscale images from the STEAM camera. Therefore the direct data output from the STEAM camera generates 7.0G byte/s continuously. We provided a field-programmable gate array (FPGA) device as a digital signal pre-processor for image reconstruction and finding objects in a microfluidic channel with high data rates in real time. We also utilized graphics processing unit (GPU) devices for accelerating the calculation speed of identification of the reconstructed images. We built our prototype system, which including a STEAM camera, a FPGA device and a GPU device, and evaluated its performance in real-time identification of small particles (beads), as virtual biological cells, owing through a microfluidic channel.

  19. A computer program for estimating instream travel times and concentrations of a potential contaminant in the Yellowstone River, Montana

    USGS Publications Warehouse

    McCarthy, Peter M.

    2006-01-01

    concentrations for the Yellowstone River requires information about the flow velocity throughout the 520 mi of river in the study area. Dye-tracer studies would provide the best data about flow velocities and would provide the best verification of instream travel times and concentrations estimated from this computer program; however, data from such studies does not currently (2006) exist and new studies would be expensive and time-consuming. An alternative approach used in this study for verification of instream travel times is based on the use of flood-wave velocities determined from recorded streamflow hydrographs at selected mainstem streamflow-gaging stations along the Yellowstone River. The ratios of flood-wave velocity to the most probable velocity for the base flow estimated from the computer program are within the accepted range of 2.5 to 4.0 and indicate that flow velocities estimated from the computer program are reasonable for the Yellowstone River. The ratios of flood-wave velocity to the maximum probable velocity are within a range of 1.9 to 2.8 and indicate that the maximum probable flow velocities estimated from the computer program, which corresponds to the shortest travel times and maximum probable concentrations, are conservative and reasonable for the Yellowstone River.

  20. VNAP2: a computer program for computation of two-dimensional, time-dependent, compressible, turbulent flow

    SciTech Connect

    Cline, M.C.

    1981-08-01

    VNAP2 is a computer program for calculating turbulent (as well as laminar and inviscid), steady, and unsteady flow. VNAP2 solves the two-dimensional, time-dependent, compressible Navier-Stokes equations. The turbulence is modeled with either an algebraic mixing-length model, a one-equation model, or the Jones-Launder two-equation model. The geometry may be a single- or a dual-flowing stream. The interior grid points are computed using the unsplit MacCormack scheme. Two options to speed up the calculations for high Reynolds number flows are included. The boundary grid points are computed using a reference-plane-characteristic scheme with the viscous terms treated as source functions. An explicit artificial viscosity is included for shock computations. The fluid is assumed to be a perfect gas. The flow boundaries may be arbitrary curved solid walls, inflow/outflow boundaries, or free-jet envelopes. Typical problems that can be solved concern nozzles, inlets, jet-powered afterbodies, airfoils, and free-jet expansions. The accuracy and efficiency of the program are shown by calculations of several inviscid and turbulent flows. The program and its use are described completely, and six sample cases and a code listing are included.