Network modelling for road-based Faecal Sludge Management

Improvements in the collection and treatment of sewage are critical to reduce health and environmental hazards in rapidly-urbanising informal settlements. Where sewerage infrastructure is not available, road-based Fecal Sludge Management options are often the only alternative. However, the costs of fecal sludge transportation are often a barrier to their implementation and operation and thus it is desirable to optimise travel time from source to treatment to reduce costs. This paper presents a novel technique, employing spatial network analysis, to optimise the spatio-topological configuration of a road-based fecal sludge transportation network on the basis of travel time. Using crowd-sourced spatial data for the Kibera settlement and the surrounding city, Nairobi, a proof-of-concept network model was created simulating the transport of waste from the 158 public toilets within Kibera. The toilets are serviced by vacuum pump trucks which move fecal sludge to a transfer station from where a tanker transports waste to a treatment plant. The model was used to evaluate the efficiency of different network configurations, based on transportation time. The results show that the location of the transfer station is a critical factor in network optimisation, demonstrating the utility of network analysis as part of the sanitation planning process

Information, Cooperation, and the Blurring of Boundaries – Technology Transfer in German and American Discourses

Meier F, Krücken G, Müller A. Information, Cooperation, and the Blurring of Boundaries – Technology Transfer in German and American Discourses. Higher Education. 2007;53(6):675-696.The aim of this paper is to examine changing discursive conceptualizations of technology transfer mechanisms for speeding up innovation in Germany and the US since World War II with particular emphasis on universities. According to our analysis, the concepts of technology transfer are getting more and more complex, taking off from a linear model of innovation to a more complex model allowing for networking and entrepreneurial activities of the universities themselves. We suggest that the discourses in both countries can be framed employing three ideal-typical models: the information and documentation model, the cooperation model, and the blurring of boundaries model. In addition to these similarities, we also discuss differences that can be traced back to broader political cultures in which technology transfer is embedded. Both similarities and differences allow for a comparative perspective which is not limited to the countries analyzed here