Connection Machine Simulation of Boundary Effects in Ultrasonic NDE

  • P. P. Delsanto
  • H. H. Chaskelis
  • T. Whitcombe
  • R. Mignogna

Abstract

Sequential (von Neumann) computers, having a single processor and a very large amount of memory, are inherently inefficient for most applications. In fact, while the processor is extremely busy all the time, only a small portion of the memory is active. Larger computers are even less efficient, since the ratio of processing power to memory is even smaller and the length of computation is dominated by the ever-increasing time required to move data between processor and memory. To overcome this so-called “von Neumann bottleneck,” a new kind of computer, called the “Connection Machine” (CM) has been designed, with a large number (many thousands or even millions, if virtual processors are also included) of processors, connected in a programmable way, in the framework of a fixed physical wiring scheme.1,2.

Keywords

Wave Propagation Intermediate Layer Mesh Point Source Wave Iteration Equation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    W. Daniel Hillis, “The Connection Machine,” The MIT Press, Cambridge, Mass. (1985).Google Scholar
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    “Introduction to Data Level Parallelism” (Thinking Machines Technical Report 86.14), Thinking Machines Corporation, Cambridge, Mass. (1986).Google Scholar
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    L. M. Brekhovskikh, “Waves in Layered Media,” Academic Press, New York (1980).Google Scholar
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    P. P. Delsanto, T. Whitcombe, H. H. Chaskelis and R. B. Mignogna, Use of the Connection Machine to Study Ultrasonic Wave Propagation in Materials, in: “Review of Progress in QNDE,” Vol. 9A, p. 141, D. O. Thompson and D. E. Chimenti, eds., Plenum Press, New York (1990).Google Scholar
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    P. P. Delsanto, T. Whitcombe, H. H. Chaskelis and R. B. Mignogna, Proc. Conf. “Elastic Wave Propagation in Materials,” edited by S. K. Datta et al., North Holland, Amsterdam (1990).Google Scholar
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    P. P. Delsanto, T. Whitcombe, H. H. Chaskelis and R. B. Mignogna, to be submitted to Wave Motion.Google Scholar
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    P. P. Delsanto, T. Whitcombe, N. K. Batra, H. H. Chaskelis and R. B. Mignogna, to appear in the “Proc. 17th Annual Review of Progress in QNDE,” Vol. 10, D. O. Thompson and D. E. Chimenti, eds.Google Scholar

Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • P. P. Delsanto
    • 1
  • H. H. Chaskelis
    • 2
  • T. Whitcombe
    • 2
  • R. Mignogna
    • 2
  1. 1.Dipartimento di FisicaPolitecnico di TorinoTorinoItaly
  2. 2.Mechanics of Materials BranchNaval Research LaboratoryUSA

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