1. School of Mechanical Engineering, Pusan National University San 30, Chang Jeon Dong, Kum Jeong Gu, Pusan 609-735, Korea
2. Living System Laboratory LG Electronics 391-2, Ga Eum Jeong-Dong, Changwon Gyeong Nam, 641-711, Korea
3. Supercomputing Center, Korea Institute of Science and Technology Information, P.O. Box 122, Yusong, Taejon, Korea