1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, and Computer Science, Univ. of Illinois at Urbana-Champaign, Urbana, IL.
2. Ph.D. Student, Dept. of Civil and Environmental Engineering, and Computer Science, Univ. of Illinois at Urbana-Champaign, Urbana, IL.
3. Professor, Dept. of Civil and Environmental Engineering, and Computer Science, Univ. of Illinois at Urbana-Champaign, Urbana, IL.