1. Research Assistant, Center for Computation and Technology, Louisiana State Univ., Baton Rouge, LA 70803; Division of Computer Science and Engineering, Louisiana State Univ., Baton Rouge, LA 70803 (corresponding author).
2. Edwin B. and Norma S. McNeil Distinguished Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ., Baton Rouge, LA 70803.
3. Professor, Dept. of Civil and Environmental Engineering, and Center for Computation and Technology, Louisiana State Univ., Baton Rouge, LA 70803.