1. Assistant Professor, Civil Engineering Dept., Univ. of Texas at El Paso, E201D 500 W. University Ave., El Paso, TX 79968.
2. Assistant Professor, Civil Engineering Dept., Univ. of Texas at El Paso, E201P 500 W. University Ave., El Paso, TX 79968.
3. Assistant Professor, Civil, Architectural, and Environmental Engineering Dept., Drexel Univ., 3141 Chestnut Street, Philadelphia, PA 19104.