Jang Won Bae

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Agent-based models have been used for diverse domains such as military, sociology, and urban planning. There is a growing concern about the incrementality and the flexibility of the agent-based models in further sophisticated and large-scale utilization. To resolve this concern, we suggest that specifying agent-based models formally will resolve the(More)
Recently, a challenge in defence modelling and simulation is that simulating a satisfactory number of scenarios often requires an infeasible runtime. This paper resolves this challenge by utilizing a tabulation technique that encourages reuses of the previous simulation results in hierarchical models. For example, a mission-level model may contain a number(More)
Discrete event models are widely used to replicate, analyze, and understand complex systems. DEVS (Discrete Event System Specification) formalism enables hierarchical modeling, so it provides an efficiency in the model development of complex models. However, the hierarchical modeling incurs prolonged simulation executions due to indirect event exchanges(More)
This paper introduces EMSSim that is an agent-based simulation of emergency medical services during disasters. We developed EMSSim to encompass the disaster victims' pass-ways from their rescues to their definitive care. This modeling scope resulted that our model delivers the detailed geographical and medical modeling which are often modeled separately.(More)
DEVS formalism is a widely utilized representation for a discrete event model, and this formalism is frequently adapted to specify the structure and the behavior of simulation models. One advantage of DEVS is its hierarchy structure of flexible composition of models, but this hierarchy often becomes a double-edge sword that might hinder a faster simulation(More)
A well-functioning Emergency Medical Service (EMS) system is a fundamental requirement for saving lives in a Mass Casualty Incident (MCI). While the benefit of strengthening an EMS system is obvious, it is not so evident which components in an EMS system will most contribute to its performance. Using the Emergency Medical Service Simulation model (EMSSim),(More)