1. Asst. Prof., Div. of Envir. and Water Resour. Engrg., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Nanyang Ave., Singapore 639798.
2. Prof. and Head, Div. of Envir. and Water Resour. Engrg., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Nanyang Ave., Singapore 639798.
3. Assoc. Prof. and Head, Div. of Geotech. and Transp. Engrg., School of Civ. and Struct. Engrg., Nanyang Technol. Univ., Nanyang Ave., Singapore 639798.