To: seminaire@pauillac.inria.fr
From: Didier.Remy@inria.fr
Subject: SEM - INRIA : Mosvova - 15/07/02 - Paris - FR

      Vous pouvez maintenant vous abonner à nos annonces de séminaires
             http://pauillac.inria.fr/seminaires/subscribe.html


                             S E M I N A I R E
                                         . ___ 
                           /   _   _      /   _   /
                          /   / \ / \  / /   __| /
                         |___ |_/ |_/ / |__ |_/ |_
       ___      .                  /    
      /    ___   __  /_  _   /   _/        /| /|  _   __ __ _       _ 
     /    /   / /_  /   __| /             / |/ | / \ /_ /  / \ | / __|
    |___ /   / __/ |_  |_/ |_            /     | |_/__/ |_ |_/ |/ |_/
                                                
                          I N R I A - Rocquencourt
                       Salle de conference du Bat 11

                          Lundi 15 juillet, 10h30

                              ----------------
                              Carlos A. Varela
                              ----------------

                      Rensselaer Polytechnic Institute

  =======================================================================
  A Language and Architecture for Distributed Computing over the Internet
  =======================================================================

   The explosive growth  of the Internet and the World  Wide Web creates an
   opportunity   for  reusing   this  massive,   distributed  communication
   infrastructure to globally perform computations on behalf of potentially
   mobile users.

   Coordinating  concurrent,  distributed  and  mobile activities  in  such
   "World-Wide  Computer" is  a  difficult task.   We  present a  scalable,
   hierarchical  model for  actor coordination,  as a  basis  for reasoning
   about and  building worldwide  distributed systems.  To  demonstrate the
   viability of our approach,  we have developed a prototype actor-oriented
   programming language (SALSA) and its run-time architectural support.

   We present  the operational semantics  for our model and  illustrate our
   architecture  using several  examples: three  multicasting  protocols, a
   messenger  carrying  remote  exception-handling  code  and  a  worldwide
   migrating agent.  SALSA programs  are preprocessed into Java, leveraging
   the existence of safe cross-platform virtual machine implementations.