1. Postdoctoral Fellow, Dept. of Civil Engineering, Univ. of Sherbrooke, Sherbrooke PQ, Canada J1K 2R1.
2. Professor, Dept. of Civil Engineering, Univ. of Sherbrooke, Sherbrooke PQ, Canada J1K 2R1.
3. Professor, Dept. of Civil Engineering, Royal Military College, Kingston ON, Canada K7K 7B4.