1. Research Associate, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, Campus Box 428, Boulder, CO 80309.formerly, Doctoral Student, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana–Champaign, 205 N. Mathews, Urbana, IL 61801.
2. Associate Professor, Dept. of General Engineering, Univ. of Illinois at Urbana-Champaign, 104 S. Mathews #117, Urbana, IL 61801.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 205 N. Mathews, Urbana, IL 61801.