1. Senior Researcher, Built Environment, Council for Scientific and Industrial Research, Meiring Naude Rd., Brummeria, Pretoria 0184, South Africa (corresponding author). ORCID: .
2. Principal Research Engineer, Meraka Institute, Council for Scientific and Industrial Research, Meiring Naude Rd., Brummeria, Pretoria 0184, South Africa; Research Innovation Associate, Dept. of Electrical Engineering, Tshwane Univ. of Technology, Pretoria 0001, South Africa.
3. Researcher, Built Environment, Council for Scientific and Industrial Research, Meiring Naude Rd., Brummeria, Pretoria 0184, South Africa.