1. Department of Electrical Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia
2. Department of Electrical Engineering, Institut Teknologi Telkom Surabaya, Surabaya, Indonesia
3. Department of Computer Science and Electrical Engineering, Kumamoto University, Kumamoto, Japan
4. Department of Computer Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia