🚀 go-pugleaf

Info-Graphics Digest	Sun Feb 23 03:00:29 PST 1986

 - Send submissions to Info-Graphics@AIDS-Unix
 - Send requests for list membership to Info-Graphics-Request@AIDS-Unix

Today's Topics:

 IBM compatable presentation graphics
 Ph.D. Defense Announcement

----------------------------------------------------------------------

  at 15:17:39 CST
Date: 19 FEB 86 15:19-CST
From: MCDONALD%UMKCVAX1.BITNET@WISCVM.WISC.EDU
Subject: IBM compatable presentation graphics

PC user,

  I have a user who wants a presentation graphics package for an IBM compatible.
He thinks all he needs is bar charts, pie charts and line graphics.  Wants it
in color.  Seen any recent comparisons??  Also, know any good graphic printers??

  Probably won't want to spend to much on either.

                                                Thanks,
                                                -GaryM. BITNET contact
                                                UMKCVAXn (n=1, 3)
                                                Univ. of Mo. at K.C.

ps.  As I am not a subscriber to this digest, please reply to
                MCDONALD @ UMKCVAX1 . BITNET

------------------------------

From: Nasa Project <Tempus%upenn.csnet@CSNET-RELAY.ARPA>
Subject: Ph.D. Defense Announcement
Date: Wed, 19 Feb 86 15:23 EST




                            HIERARCHICAL REASONING:
                         SIMULATING COMPLEX PROCESSES
                      OVER MULTIPLE LEVELS OF ABSTRACTION

                               Paul A. Fishwick
                          University of Pennsylvania

                                 Ph.D. Defense



                                   Abstract


This  talk  describes a method for simulating processes over multiple levels of
abstraction.  There has been recent work with  respect  to  data,  object,  and
problem-solving  abstraction,  however,  abstraction in simulation has not been
adequately explored.  We define a process as a hierarchy of distinct production
rule  sets  that  interface  to  each  other  so that abstraction levels may be
bridged where desired.  In this way, the process may be studied at  abstraction
levels  that  are appropriate for the specific task: notions of qualitative and
quantitative reasoning are integrated to form a complete  process  description.
The  advantages  to  such  a  description  are increased control, computational
efficiency and selective reporting of simulation results.  Within the framework
of  hierarchical  reasoning,  we  will  concentrate  on  presenting the primary
concept of process abstraction.

A Common Lisp implementation of the hierarchical reasoning theory called  HIRES
is  presented.    HIRES  allows the user to reason in a hierarchical fashion by
relating certain facets of the simulation to levels of abstraction specified in
terms of actions, objects, reports, and time.  The user is free to reason about
a process over multiple levels by weaving through the levels either manually or
via  automatically  controlled  specifications.  Capabilities exist in HIRES to
facilitate the creation of graph-based abstraction levels.  For  instance,  the
analyst  can create continuous system models (CSMP), petri net models, scripts,
or generic graph models that define the process model  at  a  given  level.  We
present  a  four-level  elevator  system  and a two-level "dining philosophers"
simulation. The dining philosophers simulation  includes  a  3-D  animation  of
human body models.


Time: Wednesday, February 26, 3pm

Place: Moore School, Room 554

Committee:

Dr. Norman Badler (Adviser)
Dr. Timothy Finin (Chairman)
Dr. Insup Lee
Dr. Richard Paul



------------------------------

End of INFO-GRAPHICS
********************