1. Department of Environmental Engineering and Physics, University of Basilicata, Via Lazazzera, 75100 Matera, Italy
2. Department of Architecture, Planni ng and Transport Systems, University of Basilicata, Via Lazazzera, 75100 Matera, Italy
3. Department of Applied Physics, Polytechnic of Bari, Via E. Orabona, 4—70126 Bari, Italy