1. Ph.D. Student, School of Electrical and Computer Engineering, Robotics Institute, Georgia Institute of Technology, 777 Atlanta Dr. N.W., Atlanta, GA 30332-0355.
2. Postdoctoral Associate, Rinker School of Construction Management, Univ. of Florida, Gainesville, FL 32611.
3. Associate Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlanta Dr. N.W., Atlanta, GA 30332-0355 (corresponding author).