Author:Sharma, A; Gumede, T; Kuun, C; McAlister, B; Qwabe, ODate:01 Sep 2010We present in this paper the design, development and pilot process of the Lwazi community communication service (LCCS), a multilingual automated telephone-based information service. The service acts as a communication and dissemination tool ...Read more
Author:Engelbrecht, AD; North, Brian C; Oboirien, BODate:31 Aug 2010South Africa has abundant resources of high-ash and other low-quality coals. The aim of this work is to investigate the possibility of using fluidised bed gasification technology to convert these coals into clean fuel gas. The fuel gas can ...Read more
Author:Osman, A; Herthogs, PDate:01 Sep 2010Medium-Density Mixed Housing (MDMH), of which social housing (SH) is one component, is perceived to have the capacity to contribute to the transformation of fragmented South African cities more than the massive roll-out of government subsidised ...Read more
Author:Kirton, A; Scholes, B; Archibald, SDate:Aug 2010Often researchers are interested in obtaining estimates of variables which are quite difficult or expensive to measure. To obtain these estimates, relationships between those variables of interest and more easily measured variables are used. ...Read more
Author:Greeff, MDate:01 Sep 2010Decision making - with the goal of finding the optimal solution - is an important part of modern life. For example: In the control room of an airport, the goals or objectives are to minimise the risk of airplanes colliding, minimise the time ...Read more
Author:Motshekga, S; Kesavan Pillai, Sreejarani; Ray, Suprakas S; Krause, R; Jalama, KDate:01 Sep 2010Metal nanoparticles coated onto carbon nanotubes (CNTs) provide a way to obtain novel materials with useful properties for gas sensing and catalyst application. Metal oxides are well-known materials suitable for detecting a wide spectrum of ...Read more
Author:Sikhwivhilu, L; Ray, Suprakas SDate:01 Sep 2010Synthesis and engineering of the nanostructured semiconductors based on metal oxides have received considerable attention due to their unique physical and chemical properties, and their potential applications in industry and technology. While ...Read more
Author:Botha, Adèle; Makitla, I; Ford, M; Fogwill, T; Seetharam, D; Abouchabki, C; Tolmay, JP; Oguneye, ODate:31 Aug 2010The story of mobile telecommunications in Africa and the developing world is a remarkable one. Africa's mobile cellular growth rate has been the highest of any region over the past 5 years, averaging close to 60% year on year. Large cellular ...Read more
Author:Wepnener, I; Richter, W; Joubert, ADate:01 Sep 2010Strong, bioinert materials have always been the focus for bone replacement and repair. This practice has since moved towards materials that can mimic living tissue and aid the healing process (i.e. be replaced by natural bone); thus materials ...Read more
Author:Vogt, D; Brink, VZ; Brink, S; Price, M; Kagezi, BDate:01 Sep 2010Rockfalls are responsible for more than 30 percent of the fatalities on South African gold and platinum mines, with associated costs and lost productivity. One of the most important activities in the mitigation of rockfalls is the entry ...Read more
Author:Edwards, ALDate:31 Aug 2010Noise-induced hearing loss (NIHL) negatively affects the quality of life of mine employees and costs mining companies large amounts in compensation claims. The prevention of NIHL requires early identification and recent evidence about the ...Read more
Author:Molefe, Onkgopotse M; Fogwill, T; Gerber, A; van der Merwe, ADate:01 Sep 2010Open source software (OSS) has gained prominence worldwide, largely due to cost savings and security considerations. This has caused a change in the IT sector and has led to the migration of desktops from proprietary to OSS. The problem for ...Read more
Author:Szewczuk, S; Roux, SP; Lindeque, M; Germanis, JDate:01 Sep 2010Municipal waste water, or sewage, is a combination of domestic and industrial effluent. The increasing volume of sewage due to urbanisation and economic growth places pressure on the treatment performance of existing waste treatment systems. ...Read more
Author:Zheng, Haitao; Rohwer, Mark B; Mathe, Mahlanyane KDate:31 Aug 2010Alloyed electrocatalysts such as PtNi/C[1-2], PtCo/C[3], PtCr/C[4], PtFe/C [5-6], and non-alloyed Pt-TiO2/C were reportedly investigated for methanol tolerance during Oxygen reduction reaction (ORR). The high methanol tolerance of these ...Read more
Author:Chamier, J; Crouch, AM; Leaner, J; Oberholster, Paul JDate:01 Sep 2010Toxic heavy metals in air, soil, and water are global problems that are a growing threat to the environment. Trace metal determination is currently done by expensive separation techniques which include inductively coupled plasma (ICP) and ...Read more
Author:Williams, EF; Loveday, Philip W; De Villiers, MFRDate:31 Aug 2010A piezoelectric inchworm motor is developed for battery powered unmanned aerial vehicles where energy efficiency is critical. The motor comprises two stationary clamps and a moving extender, which uses two piezoelectric stack actuators in ...Read more
Author:Maherry, ADate:01 Sep 2010Ecosystems that rely on groundwater as a water source have a natural and inherent resilience to climate change. Under natural conditions aquifers are stable water sources – in fact, ecosystems reliant on groundwater are literally the refuge ...Read more
Author:Luo, H; Modibedi, Remegia M; Ramulifho, T; Mathe, Mahlanyane KDate:31 Aug 2010Fuel cells are well-known electric generating devices which have higher energy conversion efficiency than heat engines and less exhaustion of carbon dioxide (CO2)1. There are several types of fuel cells. Solid oxide fuel cells (SOFC) and ...Read more
Author:Smit, Jacoba E; Grobler, AF; Sparrow, RWDate:01 Sep 2010The most efficient light harvesting and energy transfer systems are found in nature as part of the photosynthesis process. By extracting these system fragments and maximising their organisational structure, researchers are developing similar ...Read more
Author:Cho, Moses A; Debba, PraveshDate:01 Sep 2010Indigenous forest degradation is regarded as one of the most important environmental issues facing sub-Saharan Africa and South Africa in particular. Indigenous forest degradation is characterised by habitat fragmentation stemming from logging ...Read more