1. School of Electrical and Information Engineering, University of the Witwatersrand Private Bag x3 Wits, 2050, Republic of South Africa;
2. Mouchel Management Consulting, London 9a Wolseley Gardens, Chiswick, London, W4 3LY, UK United Kingdom;
3. Cyest Corporation, 1st Floor BlockC Kingsley Park, 85 Protea Road Chiselhurston Sandton, Republic South Africa;