1. Department of Electrical EngineeringInstitut Teknologi Sepuluh Nopember, SukoliloSurabayaIndonesia
2. Electrical Engineering DepartmentPoliteknik Elektronika Negeri Surabaya, SukoliloSurabayaIndonesia
3. Electrical Engineering DepartmentCalifornia Polytechnic State UniversitySan Luis ObispoCaliforniaUSA