1. Associate Professor, Dept. of Architecture and Planning, Univ. of Sassari, Palazzo del Pou Salit, Piazza Duomo 6, 07041 Alghero, Italy; formerly, Senior Lecturer, Dept. of Civil Engineering, Univ. of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand. E-mail: fragiacomo@uniss.it
2. Full Professor, Dept. of Civil Engineering, Colorado State Univ., Fort Collins, CO 80523-1372. E-mail: Gutkowsk@engr.colostate.edu
3. Assistant Professor, Civil Engineering Technology, Metropolitan State College of Denver, Campus Box 61, P.O. Box 173362, Denver, CO 80217-3362. E-mail: jbalogh@mscd.edu
4. Formerly, Graduate Research Assistant, Dept. of Civil Engineering, Colorado State Univ., Fort Collins, CO 80523-1372.