1. Assistant Professor, Dept. of Building and Real Estate, The Hong Kong Polytechnic Univ., Hung Hum, Kowloon, Hong Kong.
2. Lecturer, Faculty of Science and Technology, Univ. of Macau, P.O. Box 3001, Macau, Hong Kong.
3. Professor, Faculty of Science and Technology, Univ. of Macau, P.O. Box 3001, Macau.
4. C. W. Carry, Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, Edmonton AB Canada.