1. University of Lampung,Environmental Science Graduate School and Department of Electrical Engineering and Informatics,Bandar Lampung,Indonesia
2. University of Lampung,Faculty of Engineering,Department of Electrical Engineering and Informatics,Bandar Lampung,Indonesia
3. University of Lampung,Faculty of Mathematics and Natural Sciences Bandar Lampung,Department of Chemistry,Indonesia
4. University of Lampung,Faculty of Engineering,Department of Mechanical Engineering,Bandar Lampung,Indonesia