1. Lecturer, Dept. of Civil Engineering, Burapha Univ., Saensook, Muang, Chonburi 20131, Thailand.
2. Reader, Engineering Dept., Cambridge Univ., Trumpington St., Cambridge, CB2 1PZ, UK.
3. Pipeline Engineer, Pipeline Engineering Research Laboratory, Pipeline Technology Centre, Tokyo Gas Co., Ltd., 1-7-7, Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.
4. Senior Research Engineer, ExxonMobil Upstream Research Company, Houston, TX 77098.
5. Thomas R. Briggs Professor of Engineering, School of Civil and Environmental Engineering, Cornell Univ., 273 Hollister Hall, Ithaca, NY 14853.