1. Grad. Student, Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, BC, Canada V6T 1Z4. Associate Professor on leave from the Universidad de Piura, Piura, Peru.
2. Postdoctoral Fellow, Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, BC, Canada V6T 1Z4; and Lect., Dept. of Civ. and Envir. Engrg., Univ. of Adelaide, Adelaide, South Australia 5005, Australia.
3. Assoc. Prof., Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, BC, Canada V6T 1Z4.
4. Grad. Student, Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, BC, Canada V6T 1Z4.
5. Prof., Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, BC, Canada V6T 1Z4.