1. Federal University of Rio de Janeiro, COPPE, Graduate Program of Nuclear Engineering, Av. Horácio Macedo 2030, Bloco G, Sala 206, Cidade Universitária, 21941-914 Rio de Janeiro, Brazil
2. University of São Paulo, Polytechnic School, Department of Telecommunications and Control Engineering, Av. Prof. Luciano Gualberto, Travessa 3, 158, 05508-900 São Paulo, Brazil