1. Postdoctoral Scholar, Dept. of Civil, Environmental, and Aerospace Engineering, Univ. of Palermo, Viale delle Scienze—Ed. 8–90128, Palermo, Italy.
2. Professor, Dept. of Civil, Environmental, and Aerospace Engineering, Univ. of Palermo, Viale delle Scienze—Ed. 8–90128, Palermo, Italy.
3. Assistant Professor, Laboratory for Nondestructive Evaluation and Structural Health Monitoring Studies, Dept. of Civil and Environmental Engineering, Univ. of Pittsburgh, 942 Benedum Hall, 3700 O’Hara Street, Pittsburgh, PA 15261 (corresponding author).