1. Center for Information Technology Renato Archer, D. Pedro I (SP - 65) Km 143.6, Campinas, SP 13069-901, Brazil
2. Santa Catarina Federal University-Blumenau-SC, R. Pomerode 710, 89065-300 Blumenau, Brazil
3. School of Electrical and Computer Engineering, University of Campinas, Campinas, SP 13083-852, Brazil
4. Centre for Phosphor and Display Materials, Wolfson Centre for Materials Processing, Brunel University London, Uxbridge, Middlesex UB8 3PH, United Kingdom