On the 26th of July, Kwabena Nyarko from Ghana will hold his Public Defence, and will defend his thesis entitled: 'Drinking Water Sector in Ghana, Drivers for performance.' Professor Meine Pieter van Dijk will be his promotor and Professor Helmsing from ISS his co-promotor. It will be the first joint promotion between ISS (the Institute of Social Sciences) and UNESCO-IHE.