1. Professor, Dipt. PRICOS, Facoltà di Architettura, Univ. “G. D’Annunzio”, viale Pindaro 42, 65127 Pescara, Italy; formerly, Associate Proffessor, Dept. of CEA Engineering, Univ. of Colorado, Boulder, CO 80309-0428.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Michigan, Ann Arbor, MI, 48109-2125 (corresponding author).