1. Professor, Dept. of Civil Engineering, Catholic University of Santiago, Guayaquil, Ecuador.
2. Bruce G. Johnston Professor, Dept. of Civil and Environmental Engineering, ATLSS Center Deputy Director, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015.
3. Joseph T. Stuart Professor, Dept. of Civil and Environmental Engineering, ATLSS Center Director, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015.