[1] Univ Buea, Fac Engn & Technol, Dept Elect & Elect Engn, POB 63, Buea, Cameroon
[2] Debre Markos Univ, Dept Elect & Comp Engn, POB 05, Debre Markos, Ethiopia
[3] Univ Johannesburg, Fac Engn & Built Environm, Dept Elect & Elect Engn Technol, ZA-2092 Johannesburg, South Africa
[4] Univ Buea, Fac Engn & Technol, Dept Mech Engn, POB 63, Buea, Cameroon
[5] Hawassa Univ, Dept Elect & Comp Engn, POB 05, Hawassa, Ethiopia
[6] Univ Int Iberoamer, Dept Project Management, Campeche 24560, Mexico
[7] Univ Europea Atlantico, Dept Project Management, C Isabel Torres 21, Santander 39011, Spain