1. PhD, Assistant Professor, Civil Engineering Dept., Ohio Northern Univ., Ada, OH 45810.
2. PhD, Professor Emeritus, Civil and Environmental Engineering Dept., Clarkson Univ., Potsdam, NY 13699.
3. PhD, Assistant Professor, Civil and Environmental Engineering Dept., Univ. of Delaware, Newark, DE 19716.
4. PhD, Professor, Civil Engineering Dept., Hanyang Univ., Korea.