1. Doctoral Program of Information System,School of Postgraduate Studies,Universitas Diponegoro,Doctoral Program of Information,Semarang,Indonesia
2. Universitas Diponegoro,Faculty of Science and Mathematics,Department of Physics,Semarang,Indonesia
3. Politeknik Negeri Semarang,Faculty of Engineering,Department of Electrical Engineering,Semarang,Indonesia
4. Universitas Muhammadiyah Yogyakarta,Faculty of Engineering,Department of Electrical Engineering,Yogyakarta,Indonesia
5. Universitas Merdeka Madiun,Faculty of Engineering,Department of Informatics Management,Madiun,Indonesia