[ont.events] UW Computer Graphics Semi., Prof. Armstrong on "Solution of Equations of Motion on a Virtual Tree Machine".

mwang@watmath.UUCP (mwang) (11/20/85)

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                             - Tuesday, November 12, 1985.

         Prof. S. Christodoulakis of this department will speak on ``Optical
         Disks in Office Automation and their Retrieval Performance''.

         TTIIMMEE::                12:30 PM

         RROOOOMM::              MC 5158

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         Optical disks started appearing in the computer market.
         It  is  projected that they will compete favorably with
         magnetic  storage  media in many demanding applications
         like office filing and engineering data bases.  In this
         talk  we  outline  the projected long term difficulties
         between magnetic and optical disks and we describe some
         properties  of optical disks that make them appropriate
         for these markets.

         Based  on our description we present a model for study-
         ing  the performance of retrieval operations from opti-
         cal disks.  We then describe a simple optical disk head
         scheduling  algorithm and we present exact and approxi-
         mate  analytic  formulae  for the evaluation of the re-
         trieval  cost for documents and records from an optical
         disk.   Finally  we outline some research directions in
         the area.