1. Professor, Dept. of Civil Mining and Geological Engineering, École Polytechnique, Montreal PQ, Canada H3C3A7.
2. Senior Engineer, Calculatec Inc., 4455 St-Hubert, Montreal PQ, Canada H2J 2X1.
3. Professor and Deputy Director, Dept. of Civil, Structural, and Environmental Engineering, State Univ. of New York at Buffalo, Buffalo, NY 14260.