1. Research Associate, Protective Technology Research Center, Nanyang Technological Univ., 639798 Singapore.
2. Associate Professor, Protective Technology Research Center, Nanyang Technological Univ., 639798 Singapore.
3. Assistant Professor, Protective Technology Research Center, Nanyang Technological Univ., 639798 Singapore.
4. Civil Engineer, Defense Science and Technology Agency, 1 Depot Rd., 109679 Singapore.