1. Postdoctoral Scholar, Dept. of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State Univ., Raleigh, NC 27695-7908 (corresponding author).
2. Professor, Dept. of Statistics, 2311 Stinson Dr., Campus Box 8203, North Carolina State Univ., Raleigh, NC 27695-7622.
3. Professor and Head, Dept. of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State Univ., Raleigh, NC 27695-7908.