1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Michigan, Ann Arbor, MI 48109.
2. Dept. of Civil and Environmental Engineering, Univ. of Michigan, Ann Arbor, MI 48109.
3. Ph.D. Candidate, Dept. of Electrical Engineering and Computer Science, Univ. of California, Irvine, CA 92697.
4. Dept. of Electrical Engineering and Computer Science, Univ. of California, Irvine, CA 92697.