1. PhD Candidate, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 3142 Newmark CE Lab, Urbana, IL 61801.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Illinois at Urbana-Champaign, 3129c Newmark CE Lab, Urbana, IL 61801.
3. Professor. Dept. of Computer Science, Univ. of Illinois at Urbana-Champaign, 2123 Digital Computer Lab, Urbana, IL 61801.