1. Senior Consultant, Atkins Rail, Asset Management Group, The Axis, 10 Holliday St., Birmingham, B1 1TF, U.K.
2. Senior Lecturer, Aston Univ., School of Engineering and Applied Science, Aston Triangle, Birmingham, B4 7ET, U.K.
3. Director of Postgraduate Studies, Aston Univ., School of Engineering and Applied Science, Aston Triangle, Birmingham, B4 7ET, U.K.