1. Department of Electronics for Automation, Faculty of Engineering, University of Brescia, Via Branze, 38, I-25123 Brescia, Italy
2. Artist, Via Pirandello, 2, I-24050 Cavernago, Bergamo, Italy
3. Department of Computing, Goldsmiths College, University of London, New Cross, London SE14 6NW, England, United Kingdom