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Integrating web-based simulation on IT systems with finite probabilistic DEVS

Discrete Event System Specification theory has been applied to diverse domain areas with specific computer languages. MS4 Me software is based on Java for DEVS Modeling and Simulation (M&S). However, it provides Meta DEVS models called DEVS Natural Language (DNL) for an atomic model and System Entity Structure (SES) for a coupled model. The Meta DEVS model capability coalesces DEVS M&S with a web server to monitor and track real users' behaviors. We introduce Web-based Simulation Systems (WSS) consisting of databases for model information and a web simulator on a web server. Atomic models used in WSS are expressed with DNL and additional information to be displayed on web pages. Coupled models are represented with SES describing their internal structures and coupling information. We show detailed implementation of a web DEVS model using DNL and XML, and how web-based simulation works with atomic, coupled, simulator and coordinator databases. As a demonstration of WSS, a health care model with Finite Probabilistic DEVS (FP-DEVS) is applied. The WSS provides a pruning web page to create instances of a SES document, and simulation result web page to display collected data.