1. Meliponini Engineering Laboratory, Energy Sustainability Focus Group (ESFG), Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Pahang, Malaysia
2. Department of Translational Research and Prototype Development, Malaysia Genome Institute (MGI), National Institute of Biotechnology Malaysia (NIBM), Kajang, Selangor Darul Ehsan, Malaysia
3. Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bota, Perak, Malaysia
4. College of Applied Engineering, Tikrit University, Tikrit, Iraq