1. Senior Research Engineer, Samsung Heavy Industries Co., Ltd., Marine Research Institute, 103-28, Munji-dong, Yuseong-gu, Daejeon, Korea.
2. Professor, 1-4-1, Kagamiyama, Higashi-Hiroshima City, Hiroshima, Japan, Dept. of Social and Environmental Engineering, Graduate School of Engineering, Hiroshima Univ.