From: Jurgen Vinju
To:
Date: Fri, 5 Nov 2004 13:09:54 +0100
Subject: PEM: Tobias Kuipers | Object Identification using Cluster and Concept Analysis | 22.04.99

 
From: pem (PEM moderator)
To: pem-noreply
Subject: PEM meeting | 22.04.99 | M2.79, CWI 
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   Dear Environmentalists,

   PEM  has been awfully quiet for the last few weeks, so this week there
   will  be  two.  The  first one, at the usual time on Thursday morning,
   will be by me, your friendly PEM organiser. Details at the end of this
   mail.  The second one will be on Friday morning, by Andreas Winter, of
   the  University  of Koblenz, Germany. More on that meeting in the next
   mail.

   This announcement can be found at <http://www.cwi.nl/~pem>

          Object Identification using Cluster and Concept Analysis

   Date:    22.04.99
   Time:    10:00
   Venue:   M2.79, CWI
   Speaker: Tobias Kuipers
   Title:   Object Identification using Cluster and Concept Analysis

   [joint work with Arie van Deursen]

   [This talk will also be held at ICSE'99, Friday May 21, 1999]

   Many  approaches to support (semi-automatic) identification of objects
   in  legacy  code  take  the  data  structures  as  starting  point for
   candidate  classes. Unfortunately, legacy data structures tend to grow
   over  time,  and  may  contain  many  unrelated  fields at the time of
   migration.   We   propose   a   method   for  identifying  objects  by
   semi-automatically  restructuring  the  legacy data structures. Issues
   involved  include  the  selection  of  record  fields of interest, the
   identification  of  procedures  actually dealing with such fields, and
   the  construction  of  coherent  groups  of fields and procedures into
   candidate  classes. We explore the use of cluster and concept analysis
   for  the  purpose  of  object  identification, and we illustrate their
   effect  on  a  100,000  LOC  COBOL  system.  Furthermore, we use these
   results to contrast clustering with concept analysis techniques.
     _________________________________________________________________

   The  programming environment meetings are a forum for the presentation
   and  discussion  of  new  ideas,  ongoing and finished work. A typical
   meeting  addresses  a subject in the area of programming environments,
   program  generation, algebraic specification, term rewriting, parsing,
   etc.  A presentation ideally takes between 45 and 90 minutes. Meetings
   taking  longer  than 45 minutes are interrupted by a coffeebreak. Most
   Thursdays,  a  meeting is held which starts at 10:00 am. in one of the
   rooms at CWI/WINS. Exceptionally, dates or times may change.

   The    program    of    the    meetings    is    available   on   WWW:
   http://www.cwi.nl/~pem
     _________________________________________________________________