1. Università degli Studi di Firenze,Department of Information Engneering,Florence,Italy
2. Franklin and Marshall College,Department of Physics and Astronomy,Lancaster,PA,USA
3. Franklin & Marshall College,Department of Earth and Environment,Lancaster,PA,USA
4. V.N. Karazin Kharkiv National University,Biomedical Electronics and Computer Systems,School of Radio Physics,Kharkiv,Ukraine