1. Ph.D. Candidate, Dept. of Civil Engineering, City College of New York, New York, NY 10031 (corresponding author).
2. Assistant Professor, Dept. of Statistics, Columbia Univ., New York, NY 10027.
3. Ph.D. Candidate, Dept. of Civil Engineering, City College of New York, New York, NY 10031.
4. Associate Professor, Dept. of Civil Engineering, City College of New York, New York, NY 10031.