1. Associate Professor, Dr. Eng., Dept. of Civil and Environmental Engineering, Yamaguchi Univ., Ube, Yamaguchi, Japan (corresponding author).
2. Manager, Eight-Japan Engineering Consultants Inc.
3. Professor, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., University Park, PA,
4. Professor Emeritus, Yamaguchi Univ., Ube, Yamaguchi, Japan.