1. Graduate Student, Multimedia Environmental Simulation Laboratory, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355.
2. Senior Research Engineer, Multimedia Environmental Simulation Laboratory, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355.
3. Professor, Multimedia Environmental Simulation Laboratory, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0355 (corresponding author).