1. Lieutenant Colonel, U.S. Army, Ph.D. student, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908; Academy Professor, Dept. of Civil and Mechanical Engineering, United States Military Academy, West Point, NY 10996.
2. Derr Professor, Industrial Engineering, Texas Tech Univ., Lubbock, TX 79409; formerly, Associate Professor, Fitts Dept. of Industrial and Systems Engineering, North Carolina State Univ., Raleigh, NC 27695-7908.
3. Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695-7908 (corresponding author).