Author:Cooper, Antony K; Kourie, DG; Coetzee, SDate:Oct 2010Conventionally in formal concept analysis (FCA), concept stability is preferred in the lattice, because instability (i.e. low stability) represents noise that clouds the analysis of the data. However, high concept stability means that there ...Read more
Author:Oosthuizen, RudolphDate:Sep 2011The objective of Joint Air Defence (JAD) is to defend own assets against all types of hostile aerial attack. Due to modern trends this will often occur within the context of Operations Other Than War (OOTW). OOTW is a complex environment where ...Read more
Author:Veerasamy, NamoshaDate:Jun 2021Cyber attacks can affect the confidentiality, integrity and availability of data/ systems. Some attacks aim to steal data whereas others try cause destruction. One such vulnerability stems from the malicious use of USB chargers. When travelling ...Read more
Author:Ledwaba, Lehlogonolo; Venter, HSDate:Jan 2017The ability to network machinery and devices that are otherwise isolated is highly attractive to industry. This has led to growth in the use of cyber-physical systems (CPSs) with existing infrastructure. However, coupling physical and cyber ...Read more
Author:Smuts, H; Kotzé, Paula; van der Merwe, A; Loock, MDate:Oct 2015The outsourcing of information systems has grown as an accepted business trend, with several reasons being cited for considering IS outsourcing. However, there is evidence that IS outsourcing threats may impact negatively on the initial intent ...Read more
Author:Mabhali, Luyolo AB; Sacks, N; Pityana, Sisa LDate:Jun 2012Laser surface alloying of aluminium AA1200 was performed with a 4 kW Nd:YAG laser to improve the abrasion wear resistance. Aluminium surfaces reinforced with metal matrix composites and intermetallic phases were achieved. The phases present ...Read more
Author:Van Wilgen, BW; Richardson, DMDate:May 2012Alien conifers, mainly pines, have been planted in South Africa for a range of purposes for over 300 years. Formal plantations cover 660 000 ha of the country, and invasive stands of varying density occur on a further 2.9 million ha. These ...Read more
Author:Verhaeghe, Benoit MJA; Sadzik, E; Visser, ADate:Aug 2006Since the 1970s, the South African Heavy Vehicle Simulator (HVS) Programme has had a major technological and economic impact on the design, construction and maintenance of South African roads. It has impacted, for instance, on the development ...Read more
Author:Du Plessis, L; Coetzee, NF; Hoover, TP; Harvey, JT; Monismith, CLDate:Jun 2006The purpose of this paper is two fold. First, it will provide a brief description of the technological developments involved in the Heavy Vehicle Simulator (HVS) accelerated pavement testing equipment. This covers the period from concept in ...Read more
Author:Turton, ADate:Nov 2008South Africa is a fledgling democracy with a turbulent history. That history is a cocktail of good and bad, of success and failure, but it has provided us with a rich incubator for ingenuity. To me the simple question is what role should a ...Read more
Author:Van Heerden, Adelai; De Beer, MorrisDate:Sep 2015The present mixed methods study is based on responses to open-ended questions posed as well as quantitative positive psychology construct questionnaire data of three different year groups of military Special Operations Forces candidates. The ...Read more
Author:Meyers, Bronwyn C; Snedden, Glen C; Meyer, JP; Roos, TH; Mahmood, GIDate:Nov 2012A stereoscopic particle image velocimetry (PIV) system was used to obtain the velocity field of a can-type combustor in the non-reacting condition. In order for these measurements to be taken, an optically accessible can-type forward flow ...Read more
Author:Fourie, CJS; Van Dam, CLDate:2008All electromagnetic geophysical methods, but the frequency domain methods in particular, depend on the skindepth as a guide to the depth of investigation or penetration from the surface. By definition the skindepth is the distance where the ...Read more
Author:Anochie-Boateng, Joseph; Komba, Julius J; Mvelase, Gculisile MDate:Jun 2013There is a need to improve the measurements of shape characteristics of aggregates and ballast materials used in the construction of road, airfield, and railway track infrastructures. The fundamental shape properties of aggregate and ballast, ...Read more
Author:Meyers, BC; Snedden, Glen C; Meyers, Bronwyn C; Roos, TH; Mahmood, GIDate:Sep 2009The three-dimensional flow field inside a generic can-type, forward flow, experimental combustor was measured. A stereoscopic Particle Image Velocimetry (PIV) system was used to obtain the flow field of the combustor in the non-reacting ...Read more
Author:Kanjee, R; Bachoo, AK; Carroll, JDate:Dec 2015This paper proposes and validates a real-time onroad vehicle detection system, which uses a single camera for the purpose of intelligent driver assistance. A three-step vehicle detection framework is presented to detect and track the target ...Read more
Author:Dabrowski, J; Oberholster, Paul J; Steyl, J; Osthoff, G; Hugo, A; Power, DM; Van Wyk, JHDate:Jul 2017Thyroid function and nutritional indicators were measured in obese, steatitis-affected Mozambique tilapia Oreochromis mossambicus from Loskop Reservoir (LR), South Africa. Plasma thyroid hormones (especially T3) and thyroid follicle histomorphology ...Read more
Author:Mushove, T; Chikwanda, HK; Machio, Christopher N; Ndlovu, SDate:Apr 2009This paper reports the preliminary results of an investigation on the synthesis of a Ti-Mg alloy powder through mechanochemical processing of TiO2 and Mg powders. TiO2 was mixed with elemental Mg according to a nominal stoichiometric composition ...Read more