1. Associate Professor, Faculty of Engineering and Industrial Science (H38), Swinburne Univ. of Technology, Melbourne, P.O. Box 218, Hawthorn VIC3122, Australia (corresponding author).
2. Ph.D. Student, Swinburne Univ. of Technology, Melbourne, VIC3122, Australia.
3. Lecturer, Swinburne Univ. of Technology, Melbourne, VIC3122, Australia.
4. Senior Principal/Director, DST Consulting Engineers, Thunder Bay, Ontario, P7B 5V5, Canada.