1. Associate Professor, College of Information Technology and Engineering, Marshall Univ., Huntington, WV 25755-2586 (corresponding author). E-mail: zatar@marshall.edu
2. Professor, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506-0281.
3. Associate Professor, Dept. of Civil Engineering, Rose Holman Institute of Technology, Terre Haute, IN 47803.
4. Senior Project Engineer, Golder Associates, Inc., 44 Union Blvd., Lakewood, CO 80228.