1. Rapp Foundation Presidential Assistant, Professor of Civil Engineering and Environmental Science, Univ. of Oklahoma, School of Civil Engineering and Environmental Science, 202 W. Boyd St., Room 334, Norman, OK 73019-0631.
2. Professor, Civil Engineering Dept., Auburn Univ., Auburn, AL 36849 (corresponding author).
3. Humana-Germany-Sherman Distinguished Professor, Educational Foundations, Leadership and Technology, Auburn Univ., Auburn, AL 36849.