1. Caltech Postdoctoral Scholar, Jet Propulsion Laboratory, California Institute of Technology, M/S 198-235, 4800 Oak Grove Dr., Pasadena, CA 91109 (corresponding author).
2. Ph.D. Candidate, Sonny Astani Dept. of Civil and Environmental Engineering, Viterbi School of Engineering, Univ. of Southern California, 3620 South Vermont Ave., KAP 217, Los Angeles, CA 90089.
3. Professor, Sonny Astani Dept. of Civil and Environmental Engineering, Viterbi School of Engineering, Univ. of Southern California, 3620 South Vermont Ave., KAP 206B, Los Angeles, CA 90089.
4. Assistant Professor, Sonny Astani Dept. of Civil and Environmental Engineering, Viterbi School of Engineering, Univ. of Southern California, 3620 South Vermont Ave., KAP 224C, Los Angeles, CA 90089.