1. Associate Professor, Dept. of Civil and Environmental Engineering, Lehigh Univ., ATLSS Center, 117 ATLSS Dr., Bethlehem, PA 18015 (corresponding author).
2. Senior Research Engineer, Air Force Research Laboratory, AFRL.RXQF, Tyndall Air Force Base, FL 32404.
3. Research Engineer, Air Force Research Laboratory, AFRL.RXQF, Tyndall Air Force Base, FL 32404.