1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews Ave., Urbana, IL 61801.
2. Professor, Paul F. Kent Endowed Faculty Scholar, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 North Mathews Ave., Urbana, IL 61801.
3. Assistant Professor, Dept. of Civil Engineering, Boise State Univ., 1910 University Dr., ERB 3137, Boise, Idaho 83725.