1. Principal Research Scientist, Maritime Research Center, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798. E-mail: csqyang@ntu.edu.sg
2. Associate Professor and Director of Maritime Research Center, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798. E-mail: ctansk@ntu.edu.sg
3. Associate Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., Singapore 639798. E-mail: csylim@ntu.edu.sg