1. Associate Professor, Swinburne Univ. of Technology, Melbourne, Australia; and Faculty of Engineering and Industrial Science (H38), Swinburne Univ. of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia (corresponding author).
2. Lecturer, Swinburne Univ. of Technology, Melbourne, VIC 3122, Australia.
3. Senior Principal/Director, DST Consulting Engineers, 605 Hewitson St., Thunder Bay, ON, Canada P7B 5V5.