1. Research Fellow, Dept. of Civ. Engrg. Materials, The Univ. of New South Wales, Kensington, N.S.W., Australia
2. Prof. of Civ. Engrg. and Head, Dept. of Civ. Engrg. Materials, The Univ. of New South Wales, Kensington, N.S.W., Australia
3. Assoc. Prof. of Civ. Engrg., Dept. of Civ. Engrg. Materials, The Univ. of New South Wales, Kensington, N.S.W., Australia