1. Concept Engineering Consultants, 8 Warple Mews, Warple Way, London W3 0RF, U.K.
2. Tutor of Technical Studies, Architectural Association School of Architecture, 36 Bedford Square, London WC1B 3ES, U.K.
3. Assistant Professor, Dept. of Civil Engineering, National Technical Univ. of Athens, Zografou 15775, Greece.