Author:Burke, Ivan D; Van Heerden, Renier PDate:Oct 2017Data breaches are becoming more common and numerous every day, where huge amount of data (corporate and personal) are leaked more frequently than ever. Corporate responses to data breaches are insufficient, when commonly remediation is minimal. ...Read more
Author:Jonker Klunne, W; Michael, EDate:2013The East African region comprises 20 countries, 14 of which use small hydropower at various degrees. The East African Power Pool (EAPP) plays an important role in the future of energy within the region. One of the main objectives of EAPP is ...Read more
Author:Jonker Klunne, WDate:2013Lesotho does not have any known indigenous sources of oil, coal or natural gas. About three quarters of its total energy demand is met by biomass fuels in the forms of wood, shrubs, animals manure and agricultural residues. The only other ...Read more
Author:Jonker Klunne, WDate:2013The total installed electricity capacity in Mozambique is 2.308 GW in 2009, nearly all generated exclusively from hydropower (99.7 per cent). Mozambique has large reserves of coal. There are utilizable reserves of natural gas that might be ...Read more
Author:Jonker Klunne, WDate:2013South Africa has a total electricity generation capacity of about 45,000 MW. Nearly 90 per cent of electricity is generated in coal-fired power stations. Koeberg, a large nuclear station near Cape Town, provides about five per cent of capacity, ...Read more
Author:Jonker Klunne, W; Michael, EDate:2013The Southern African region comprises five countries, of which Lesotho, Namibia, Swaziland and South Africa use small hydropower, with Namibia currently having a very limited use of this technology. Botswana does not possess any hydropower ...Read more
Author:Jonker Klunne, WDate:2013Power in Swaziland is supplied and distributed by the Swaziland Electricity Company (SEC), which was established in 2007 by the Swaziland Electricity Company Act. SEC currently has a monopoly on the import, distribution and supply of electricity ...Read more
Author:Jonker Klunne, WDate:2013In rural Zimbabwe, 80-90 per cent of people are heavily dependent on wood fuel. Rural populations light their homes with kerosene and carry out essential food processing tasks such as milling grain, using diesel powered systems. Access to ...Read more
Author:Maistry, Nattele; Schutz, Robert A; Cox, EttienneDate:Nov 2017Polluted or broken insulators and faulty connections on power lines induce corona and thermal (heat) radiation. The corona and heat build-up causes long term degradation of the high voltage electrical components, which leads to voltage drops, ...Read more
Author:Brydon, AG; Van der Merwe, JPDate:Feb 1986A wrap yarn is a composite structure comprising a core of twisted or twisted fibres bound by a yarn or continuous filament. The term wrap yarn therefore include yarns produced by the hollow spindle method as well as similar structure such as ...Read more
Author:Swanepoel, H; Oelofse, Suzanna HH; Schubert, M; Sehaswana, DDate:Oct 2012Developing a waste information baseline for South Africa, without doing primary data collection, proved to be an enormous task. The project team had to ensure that all available data, whether being reported or not, were collected. This process ...Read more
Author:Muswema, Aubrey PDate:Oct 2012Small business, including small, medium and micro-sized enterprises (SMMEs), is seen as the corner stone of economic development in South Africa, with reported contributions of up to 42% to the Gross Domestic Product (GDP). The South African ...Read more
Author:Muswema, Aubrey PDate:Oct 2012Integrated Waste Management Planning (IWMP) was recognised as a short-term strategy initiative for the public and private sector in the National Waste Management Strategy as far back as 1999 (DEAT, 1999). Ten years later, through the Waste ...Read more
Author:Vincent, K; Cull, T; Archer, Emma RM; Awiti, ADate:Aug 2012Increased public awareness, and the concomitant growth in political commitment to mitigation and adaptation, has made the need for accurate and relevant communication of scientific information on climate change more pressing (Fischoff, 2011). ...Read more
Author:Stafford, William HLDate:Jan 2020The adequate collection and disposal of municipal waste remains a challenge in most African town and cities. Both wastewater (i.e., sewage) and solid waste [i.e., municipal solid waste (MSW)] pose health and environmental risks as a direct ...Read more
Author:Grobler, TL; Van Zyl, AJ; Olivier, JC; Kleynhans, W; Salmon, BP; Penzhorn, WTDate:Jan 2012In this paper we reviewed Wu’s algorithm and introduced it as a cryptanalysis technique. This study reveals that when Wu’s algorithm is used for cryptanalysis it simplifies. This is true because Wu’s algorithm has to be applied to binary ...Read more
Author:Smit, JC; Cilliers, Jacques E; Baker, CJ; Hanekom, JJDate:May 2008Radar measurements of a radar calibration sphere test target suspended in sea surface multipath propagation conditions are reported. Wideband measurements together with high range resolution (HRR) processing were employed to resolve the direct ...Read more
Author:Muchavi, Noluntu S; Bam, L; De Beer, FC; Chikosha, Silethelwe; Machaka, RonaldDate:Oct 2016Parts manufactured through power metallurgy (PM) typically contain pores that can be detrimental to the final mechanical properties. This paper explores the merits of 3D X-ray computed tomography over traditional microscopy for the characterization ...Read more
Author:Barnier, V; Heintz, O; Roberts, DE; Oltra, R; Costil, SDate:Apr 2006During laser cleaning of aluminium in ambient atmosphere, modifications of the metal surface can be induced by transient thermal effects. This work aims to characterize the modification of the aluminium oxide layer on pure aluminium for a ...Read more
Author:Bolokang, AS; Phasha, MJ; Oliphant, C; Motaung, DDate:Jan 2011In the current study, results of the milled and sintered V, W, C, Co powders are presented. Analytical techniques such as SEM equipped with EDS and XRD were used to study microstructure and phase evolution, respectively. In addition to B1 ...Read more