Interfacing Laboratory Instruments to Multiuser, Virtual Memory Computers

  • Edward R. Generazio
  • Don J. Roth
  • David B. Stang
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


Computers based on virtual memory, multiuser architecture have recently become economically available to medium sized research groups (about 25 members). These new computers offer advantages to the experimentalist, though acceptance has been sometimes limited. One of the most important advantages of a virtual memory machine is the capability of fast access to arrays having dimensions greater than 64 kbytes. Arrays larger than 64 kbytes were available on some older computers based on physical memory. The access time to the memory beyond 64 kbytes is extremely slow for these systems. Fast access to large arrays is particularly important now where large data sets are required for research systems.


Instrument Control Array Processor Ultrasonic Image Fast Access Virtual Memory 


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  1. 1.
    Generazio, E.R., Stang, D.B. and Roth, D.J., “Interfacing Laboratory Instruments to Multiuser, Virtual Memory Computers,” NASA TM-4106, March 1989.Google Scholar
  2. 2.
    Generazio, E.R., Roth, D.J., and Baaklini, G.Y., Acoustic Imaging of Subtle Porosity Variations in Ceramics, Materials Evaluation, Vol. 46, No. 10, pp. 1338–1343, Sept. 1988.Google Scholar
  3. 3.
    Generazio, E.R., Stang, D.B., and Roth, D.J., “Ultrasonic Imaging of Porosity Variations Produced During Sintering,” Journal of American Ceramic Society, Vol. 72, No. 7, pp. 1282–1285.Google Scholar
  4. 4.
    Stang, D.B., Salem, J., Generazio, E.R., “Ultrasonic Imaging of Textured Alumina,” NASA TM-101478, May 1989.Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Edward R. Generazio
    • 1
  • Don J. Roth
    • 1
  • David B. Stang
    • 2
  1. 1.Lewis Research CenterNational Aeronautics and Space AdministrationClevelandUSA
  2. 2.Sverdrup Technology, Inc.NASA Lewis Research Center GroupClevelandUSA

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