1. Senior Lecturer, Dept. of Civil, Surveying and Environmental Engineering, The Univ. of Newcastle, Callaghan, NSW 2308, Australia.
2. Associate Professor, Dept. of Civil, Surveying and Environmental Engineering, The Univ. of Newcastle, Callaghan, NSW 2308, Australia.
3. Director, RCA Asutralia, 92 Hill St., Carrington NSW, 2294 Australia.