This paper presents a numerical heat transfer model for vertical U-tube Ground Heat Exchangers (GHE). This model is uniquely able to take into to account different initial soil temperatures and physical properties at different depths. The model has been validated based on an experimental case...

This article outlines a feminist foodscapes framework for exploring gender and food dynamics in Africa. It summarizes lessons learned from application of this approach to work on food issues in Gaborone, Botswana. The article argues that a holistic and politicized vision of gender, namely, a...

Several decades of research on ‘urban agriculture’ have led to markedly different conclusions about the actual and potential role of household food production in African cities. In the context of rapid urbanization, urban agriculture is, once again, being advocated as a means to...

Wie eine Umfrage in 14 Kaufzentren Gaborones (durchgeführt zwischen Juni 1983 und März 1984) zeigt, existiert eine klare Rangfolge von den am meisten zu den weniger aufgesuchten Zentren. Die Kunden entscheiden vor allem nach Preis und Qualität der jeweils angebotenen Waren, aber auch nach der...