1. Projects Development Institute (PRODA), Emene-Enugu, Nigeria
2. Department of Chemical Engineering, Nnamdi Azikiwe University (NAU), Awka, Nigerria
3. Department of Mechanical Engineering, Anambra State University, Uli, Nigeria
4. Department of Mechanical Engineering, Federal University Otuoke, Bayelsa, Nigeria
5. Department of Metallurgical and Materials Engineering, Nnamdi Azikiwe University, Awka, Nigeria