1. Department of Computer Science, Islamic University in Uganda, Mbale, 20902, Uganda
2. University of the Witwatersrand, Johannesburg, South Africa
3. Center of Geological and Mining Research, Garoua, Cameroon
4. Christian Doppler Laboratory GeoHum, Paris Lodron University of Salzburg, Salzburg, Austria
5. Muffakham Jah College of Engineering and Technology, Hyderabad, Banjara Hills, India
6. Indian Institute of Technology Roorkee, Roorkee, India