1. Institut Teknologi Bandung PT PLN (Persero),School of Electrical Engineering and Informatics,Bandung,Indonesia
2. Universitas Indonesia PT PLN (Persero),Faculty of Computer Science,Jakarta,Indonesia
3. UP2B Minahasa system PT PLN (Persero),Tomohon,Indonesia
4. Institut Teknologi Bandung,School of Electrical Engineering and Informatics,Bandung,Indonesia