Muhammad Hanis Zakariah Electrical and Electronic Enginerting Department, Universiti Teknologi PETRONAS
31750 Bandar Seri Iskandar, Tronoh, Perak. Malaysia
Poppy Puspitasari Mechanical Engineering Department, Universitas Negeri Malang, Semarang St. No. 5, East Java, Malang, Indonesia 65144 Indonesia