1. Senior Researcher, Structural Engineering Research Division, Korea Institute of Construction Technology, Gyeonggi, Korea 411-712; formerly, Postdoctoral Researcher, Institute of Ocean Energy, Saga Univ., Saga, Japan 840-8502.
2. Associate Professor, School of Naval Architecture and Ocean Engineering, Univ. Ulsan, Ulsan, Korea 680-749 (corresponding author).
3. Professor, Dept. of Ocean and Civil Engineering, Kagoshima Univ., Kagoshima, Japan 890-8580.