1. Ph.D. Candidate, Dept. of Civil Engineering, Southern Illinois Univ., Carbondale, IL.
2. Professor, Dept. of Civil Engineering, Southern Illinois Univ., Edwardsville, IL.
3. Geotechnical Engineer, Illinois DOT, Springfield, IL.
4. Ph.D. Candidate, Dept. of Mechanical Engineering, Univ. of Arizona, Tucson, AZ.