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  • 2005-2009
  • 1990-1994  (5)
  • 1985-1989
  • 1994  (5)
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  • 2005-2009
  • 1990-1994  (5)
  • 1985-1989
Year
  • 1
    Electronic Resource
    Electronic Resource
    Model independent constraints on leptoquarks from rare processes (1994)
    Springer
    The European physical journal 61 (1994), S. 613-643 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present model independent constraints on the masses and couplings to fermions ofB andL conserving leptoquarks. Such vector or scalar particles could have masses below 100 GeV and be produced at HERA; we list the generation dependent bounds that can be calculated from rare lepton and meson decays, meson-anti-meson mixing and various electroweak tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01552629
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Model independent constraints on leptoquarks from rare processes (1994)
    Springer
    Details
    Publication Date: 1994-12-01
    Print ISSN: 0170-9739
    Electronic ISSN: 1431-5858
    Topics: Physics
    Published by Springer
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    PAPER CURRENT
  • 3
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    High Performance Computing at NASA (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: The speaker will give an overview of high performance computing in the U.S. in general and within NASA in particular, including a description of the recently signed NASA-IBM cooperative agreement. The latest performance figures of various parallel systems on the NAS Parallel Benchmarks will be presented. The speaker was one of the authors of the NAS (National Aerospace Standards) Parallel Benchmarks, which are now widely cited in the industry as a measure of sustained performance on realistic high-end scientific applications. It will be shown that significant progress has been made by the highly parallel supercomputer industry during the past year or so, with several new systems, based on high-performance RISC processors, that now deliver superior performance per dollar compared to conventional supercomputers. Various pitfalls in reporting performance will be discussed. The speaker will then conclude by assessing the general state of the high performance computing field.
    Keywords: Computer Programming and Software
    Type: IBM High Performance Users Forum; Sep 27, 1994; Tokyo; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A Fortran-90 Based Multiprecision System (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: The author has developed a new version of his Fortran multiprecision computation system that is based on the Fortran-90 language. With this new approach, a translator program is not required - translation of Fortran code for multiprecision is accomplished by merely utilizing advanced features of Fortran-90, such as derived data types and operator extensions. This approach results in more reliable translation and also permits programmers of multiprecision applications to utilize the full power of the Fortran-90 language. Three multiprecision datatypes are supported in this system: multiprecision integer. real and complex. All the usual Fortran conventions for mixed mode operations are supported, and many of the Fortran intrinsics, such as SIN, EXP and MOD, are supported with multiprecision arguments. This paper also briefly describes an interesting application of this software, wherein new number-theoretic identities have been discovered by means of multiprecision computations.
    Keywords: Computer Programming and Software
    Type: RNR-94-013
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Performance and the NAS Parallel Benchmarks (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: This talk will describe the NAS (National Aerospace Standards) Parallel Benchmarks, which are now widely cited in the high performance computing field as a measure of sustained performance on realistic scientific applications. The latest performance results will be included. It will be shown that significant progress has been made by several systems during the past year or so, with sustained performance on a par with the best conventional systems, and with performance per dollar significantly exceeding the conventional systems. This talk will also describe many of the pitfalls of performance reporting, and will give advice on how to avoid such pitfalls. The overall state of the field of high performance computing will also be discussed.
    Keywords: Computer Systems
    Type: Supercomputing 1994 Conference; Nov 14, 1994 - Nov 18, 1994; Washington, DC; United States
    Format: text
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    NASA TECHNICAL REPORTS
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