Affiliation: | a Faculty of Chemical & Natural Resources Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia b Faculty of Electrical Engineering. Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia c School of Mechatronic Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia |