[Todos] Seminario apto todas las disciplinas: "Discrete-Event Modeling and Simulation Methodologies: Past, Present and Future" Gabriel Wainer Martes 14 a las 15:00hs

[Esteban Mocskos]

Fecha: 14/8
Hora: 15:00hs
Lugar: Laboratorio 5 (Depto de Computación)

Gabriel A. Wainer
Department of Systems and Computer Engineering
Carleton University, Ottawa, ON. Canada.
http://www.sce.carleton.ca/faculty/wainer

Discrete-Event Modeling and Simulation Methodologies: Past, Present and Future
==============================================================================
Modeling and Simulation (M&S) techniques have been created in the early ages 
of computing in order to better analyze the behavior of complex physical 
systems. M&S received a tremendous impulse thanks to the advances in computer 
technology. Unfortunately, in most cases the creation of simulation models is 
faced with ad-hoc techniques, ignoring previous recommendations that were 
successful in the world of software systems development.

The DEVS formalism is one of these techniques, which proved to be successful 
in providing means for modeling while reducing development complexity and 
costs. DEVS model development is based on a sound theoretical framework that 
showed to be universal (in a sense that a large number of other methodologies 
have been transformed into DEVS models). Therefore, we can build DEVS models 
that can interact with others described using different modeling techniques. 
The independence of M&S tasks made possible to run DEVS models on different 
environments (personal computers, parallel computers, real-time equipment, 
distributed simulators) and middleware. DEVS models are described using a 
hierarchical and modular specification, and was extended to provide object-
oriented facilities to improve software reuse.

We will present a historical perspective of discrete-event M&S methodologies, 
showing different modeling techniques. We will introduce DEVS origins and 
general ideas, and compare it with some of these techniques. We will then show 
the current status of DEVS M&S, and we will discuss our ideas on bridging the 
gap between the world of academic DEVS applications and a more widely useful 
technological perspective to solve current M&S problems (including real-time 
simulation, interoperability and model-centered development techniques). We 
will show some examples of the current use of DEVS, including applications in 
different fields (biology, physics, defence, industry, and artificial systems 
development). 

We will finally show current open topics in the area, which include advanced 
methods for centralized, parallel or distributed simulation, the need of real-
time modeling techniques, and our view in these fields.