1. Professor Emeritus, Han River Eco-Hydro Inst., 367-6 Chunma-Oksoo Bldg. 3F, Oksoo-dong, Sungdong-gu, Seoul, Korea 133-100; formerly, Dept. of Civil Engineering, Hanyang Univ., Seoul, Korea.
2. Researcher, Hyundai Institute of Construction Technology, Hyundai Engineering & Construction, Co. Ltd., 102-4, Mabuk-ri, Goosung-eup, Yongin, Kyeong-gi-do, Korea 449-716.