1. Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213 (corresponding author).
2. Dean, College of Engineering, Professor, Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213.
3. Professor, Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213.
4. Professor and Chair, Astani Dept. of Civil and Environmental Engineering, Univ. of Southern California, Los Angeles, CA 90089.
5. Dept. of Electrical and Computer Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213.
6. Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., Pittsburgh, PA 15213.
7. Associate Professor, Dept. of Engineering and Aviation Sciences, Univ. of Maryland Eastern Shore, Princess Anne, MD 21853.