1. Director of Engineering, Center for Biophysical Sciences and Engineering, Univ. of Alabama at Birmingham, CBSE 100, 1530 Third Ave. S., Birmingham, AL 35294 (corresponding author).
2. Associate Professor, Dept. of Civil Engineering, Auburn Univ., Auburn, AL 36849.
3. Senior Research Engineer, Air Force Research Laboratory, 139 Barnes Dr., Ste. 2, Tyndall AFB, FL 32403.