1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 115 Porter Hall, Pittsburgh, PA 15213.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., Porter Hall, 118N, Pittsburgh, PA 15213.
3. Associate Professor, Dept. of Electrical and Computer Engineering, Univ. of Illinois at Urbana-Champaign, 2021 Beckman Inst., 405 N. Mathews Ave., Urbana, IL 61801.