1. Postdoctural Researcher, Coastal and Harbor Engineering Division, Korea Ocean Research and Development Institute (KORDI), Ansan P.O. Box 29, Kyunggi-do, Korea.
2. Assistant Professor, Dept. of Civil Engineering, SungKyunKwan Univ., Jangan-gu, Suwon, Kyunggi-do 440-746, Korea.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Korea Univ., Sungbook-gu, Seoul, Korea.
4. Professor, Dept. of Civil Engineering, Kyungpook National Univ., Pook-gu, Taegu 702-701, Korea.