(ref.doc)ACM-0496

Communications of the ACM
April 96, Volume 39, Number 4
Learner-Centered Design

p 24 Section: Learner-Centered Education
  by Donald Norman and James Spohrer
  Dimensions of Instruction: Engagement, Effectiveness, Viability

- p 28 A Goal-Based Scenario for High School Students
  by Roger Schank and Alex Kass

- p 32 The Collaboratory Notebook
  by Daniel Edelson, Roy Pea and Louis Gomez

p 50 Section: Group Communication
  by David Powell
   The strongest assumption that can be made about inter-process
   communications is that any message sent by a correct process to
   another correct process is always received within a given delay --
   the so-called synchronous communication assumption.
   In practice, it is essential to introduce some notion of time...

- p 71 Distributing Trust with the Rampart Toolkit
  by Michael Reiter

- p 88 Synchronous and Asynchronous Group Communication
  by Flaviu Cristian
   guarantee bounded responses with a certain probability