1. Universiti Malaysia Sarawak (UNIMAS),Faculty of Engineering,Dept. of Electrical and Electronic Eng.,Kota Samarahan,Sarawak,Malaysia
2. Universitas Negeri Padang (UNP),Faculty of Engineering,Dept. of Electrical and Electronic Eng.,Padang,West Sumatera,Indonesia
3. Universitas Andalas (UNAND),Faculty of Engineering,Departmen of Electrical Engineering,Padang,West Sumatera,Indonesia
4. Universitas Lampung (UNILA),Faculty of Engineering,Department of Mechanical Engineering,Bandar Lampung,Lampung,Indonesia
5. Jakarta Global University,Faculty of Eng. and Information System,Dept. of Electrical Engineering,Depok,Indonesia