1. Prof. of Civ. Engrg., and Dean of Applied Sci., Univ. of British Columbia, Vancouver, B.C., Canada
2. Research Assoc., Faculty of Applied Sci., Univ. of British Columbia, Vancouver, B.C., Canada
3. Visiting Research Assoc., Faculty of Applied Sci., Univ. of British Columbia, and Sr. Lect. Civ. Engrg. Dept., Univ. of Auckland, Auckland, New Zealand