http://hdl.handle.net/10204/454 2013-06-20T09:09:15Z http://hdl.handle.net/10204/6811 Title: Wireless Sensor Networks TestBed: ASNTbed Authors: Dludla, AG; Abu-Mahfouz, AM; Kruger, CP; Isaac, JS Abstract: Wireless sensor networks (WSNs) have been used in different types of applications and deployed within various environments. Simulation tools are essential for studying WSNs, especially for exploring large-scale networks. However, WSN testbeds are still required for further testing before the real implementation. In this paper we propose an indoor testbed which is built on the ceiling board of the demonstration room. The purpose of this testbed is to evaluate various types of algorithms and protocols before using them in real world applications. This paper focuses on how to implement such testbed and what are the main challenges that we experienced while implementing the ASNTbed (Advanced Sensor Networks Testbed) and how to solve them. This paper can be considered as a guideline to help other researchers and developers to implement similar testbed. Description: IST-Africa 2013 Conference Proceedings, Nairobi, Kenya, 29 - 31 May 2013 2013-05-01T00:00:00Z http://hdl.handle.net/10204/6807 Title: Savanna woody vegetation classification – now in 3-D Authors: Fisher, JT; Erasmus, BFN; Witkowski, ETF; Van Aardt, J; Wessels, KJ; Asner, GP Abstract: The co-existence of woody plants and grasses characterize savannas, with the horizontal and vertical spatial arrangement of trees creating a heterogeneous biotic environment. To understand the influence of biogeophysical drivers on the spatial patterns of 3-D structure of woody vegetation, these patterns need to be explained over large areas to capture the context. Is there a spatially explicit, ecologically meaningful way to capture the patterns and context of 3-D woody vegetation structure? Description: Copyright: 2013 Wiley Online Library. This is an ABSTRACT ONLY. The definitive version is published in Applied Vegetation Science, pp 1-13, doi: 10.1111/avsc.12048 2013-05-01T00:00:00Z http://hdl.handle.net/10204/6797 Title: Can micro-volunteering help in Africa? Authors: Butgereit, L; Botha, RA Abstract: Micro-volunteering has been defined as convenient, bite-sized, crowdsourced, and network-managed. Micro-volunteers donate their time and energy for organisations which they may not have previously encountered (crowd-sourced), at a time which is convenient to the micro-volunteer, and in small pieces of time (bitesized). This paper looks at a micro-volunteering project where participants can volunteer for five to ten minutes at a time using a smart phone and assist pupils with their mathematics. Description: IST-Africa 2013 Conference, Nairobi, Kenya, 29-31 May 2013 2013-05-01T00:00:00Z http://hdl.handle.net/10204/6795 Title: Toward an Afro-Centric indigenous HCI paradigm Authors: Winschiers-Theophilus, H; Bidwell, NJ Abstract: Current human–computer interaction (HCI) paradigms are deeply rooted in a Western epistemology that attests its partiality and bias of its embedded assumptions, values, definitions, techniques, and derived frameworks and models. Thus tensions created between local cultures and HCI principles require researchers to pursue a more critical research agenda within an indigenous epistemology. In this article an Afro-centric paradigm is presented, as promoted by African scholars, as an alternative perspective to guide interaction design in a situated context in Africa and promote the reframing of HCI. A practical realization of this paradigm shift within our own community-driven design in Southern Africa is illustrated. Description: Copyright: 2013 Taylor & Francis. This is an ABSTRACT ONLY. The definitive version is published in International Journal of Human-Computer Interaction, vol. 29(4), pp 243-255 2013-03-01T00:00:00Z