1. Weapon System Modeling & Simulation Center, Agency for Defense Development, Yuseong P.O. Box 35, Daejeon 305-600, Korea
2. LIGNex1 Co., Ltd. 148-1, Mabuk-ri, Gusung-eup, Yongin-city, Kyonggi-do
449-910, Korea
3. Department of Computer Science, Chungnam National University 220
Gung-Dong, Yuseong-gu, Daejeon 305-764, Korea