1. Electrical Engineering Department, Institut Teknologi Telkom Surabaya , Jalan Gayungan PTT , Surabaya , Indonesia
2. Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia , Jalan Sultan Yahya Petra , Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur , Malaysia
3. Department of Mechanical Engineering, Vocational College, Universitas Gadjah Mada , Jalan Yacaranda Sekip Unit IV , Yogyakarta , Daerah Istimewa Yogyakarta , Indonesia
4. Mechanical Engineering Department, Faculty of Engineering, Universitas Sebelas Maret , Jalan Ir. Sutami 36 A, Kentingan , Surakarta , , Central Java , Indonesia