Author:Coetzer, A; Turner, Geoffrey R; Mouton, HDTDate:Jan 2016The design and implementation of a bidirectional current-controlled voltage-regulated DC-DC converter is presented. The converter is required to connect a battery of electrochemical cells (the battery) to an asynchronous motor-drive unit via ...Read more
Author:Von Solms, S; Peach, SWDate:Nov 2013Network security risks are becoming an increasing threat as new network attack methods are constantly being developed by hackers to compromise secure networks and devices. The use of a network simulation environment that can realistically ...Read more
Author:Mwila, Martin K; Mbewe, Perseverance NDate:Nov 2017This paper describes the methodology used to develop a communication platform that enhances interoperability between different types of components irrespective of the manufacturers and of the software platform. This framework is intended to ...Read more
Author:Mudali, P; Nyandeni, TC; Ntlatlapa, Ntsibane S; Adigun, MODate:Sep 2009The Wireless Mesh Network (WMN) backbone is usually comprised of stationary nodes but the transient nature of wireless links results in changing network topologies. Topology Control (TC) aims to preserve network connectivity in ad hoc and ...Read more
Author:Bezuidenhout, PH; Schoeman, J; Joubert, T-HDate:Jan 2016Printed electronics employ additive manufacturing processes and has several application possibilities for bespoke or large area devices on flexible or inexpensive substrates. One of the most compelling applications of this technological advance ...Read more
Author:Forbes, A; Botha, LR; du Preez, N; Drake, TDate:Feb 2006Laser ultrasonics is the present state-of-the art method for non-destructive testing of composite materials in the aerospace industry. The process is based on an IR laser generating an ultrasound wave that propagates inside the composite ...Read more
Author:Kenyon, CP; Matlaba, PM; Parkinson, CJ; Rousseau, AL; Van der Westhuyzen, Christiaan WDate:28 Feb 2006Recent years have brought about serious interest in the kinases as potential therapeutic targets in a variety of disease conditions. Much of this interest has centred around the preparation and utilisation of species which interact with the ...Read more
Author:Meyers, Bronwyn C; Jan, MA; van der Spuy, SJDate:Sep 2017In order to increase the power of a blowdown, turbine driven compressor test rig, a combustor was designed to insert in the flow before the turbine. The combustor was required to provide 800K output temperature in order to achieve this. The ...Read more
Author:De Witt, JJ; Alahmadi, MS; Alzamil, ADate:Oct 2012High range resolution (HRR) radar measurements can provide important feature information when performing non-cooperative target recognition. This paper presents a joint development of a mobile, X-band, HRR research radar facility, by the ...Read more
Author:Grobler, JE; Rust, FC; Vos, RMDate:Oct 1994Granular Emulsion Mixes (GEMS) are used in a wide range or road applications, ranging from low volume roads in developing areas to freeways in developing urban areas. In this paper a dual design approach for granular emulsion mixes (GEMS) is ...Read more
Author:Smith, Andrew CDate:May 2016Internet of Things (IoT) advocates promise huge benefits but what technical challenges does the maker community face in order to participate in this new technological wave? We report on our experience in incorporating a maker community friendly ...Read more
Author:Batchelor, J; Botha, AdèleDate:Sep 2009This study reports on design criteria for mobile phones as developed and implemented by students during a school research project, tasking them to create resources for their disadvantaged peers who have with no access to educational resources ...Read more
Author:Bester, Duwan C; Vermeulen, M; Prinsloo, JDate:Nov 2017Powder Bed Fusion is a process of building a part, layer-by-layer, using a Laser to melt the cross-sections of a part in a powder layer. Aeroswift is the first South African designed and manufactured PBF machine. As part of its commissioning, ...Read more
Author:Roux, K; Marais, Mario ADate:Oct 2011South Africa has approximately 26500 primary and secondary schools, of which at least 17000 are in remote rural villages. None of these rural schools have any form of Internet connectivity. The same rural villages may have one health facility ...Read more
Author:Letebele, MO; Maretlwa, KP; Mokonyama, Mathetha TDate:Jul 2008In the urban areas of South Africa the provision of parking has historically been based on town planning schemes formulated by local authorities. The parking requirements in these town planning schemes were established from the results of ...Read more
Author:Labuschagne, WA; Eloff, MM; Veerasamy, Namosha; Mujinga, MDate:May 2011Africa may have the lowest number of Internet users in the world, but it also has the highest growth rate and the number of users is steadily growing. A majority of the African population is still excluded from global cyber networks and thus ...Read more
Author:Snedden, Glen C; Smyth, J; Bindon, J; Brooks, M; Smith, GDate:Aug 2012A South African turbopump design capability would be critical to any future indigenous commercial launch capacity. This paper describes the initial work being done at the University of KwaZulu-Natal (UKZN) to design a kerosene turbopump for ...Read more
Author:Dlamini, I; Olivier, MDate:Jul 2009Currently, network evidence used in a court of law can be lacking and inadequate for prosecution purposes, due to a loss of packets during the network transmission. This packet loss in turn may be caused by the congestion of data transmitted ...Read more
Author:Pennefather, S; Bradshaw, K; Irwin, Barry VWDate:Sep 2017Currently, network analytics requires direct access to network packets, normally through a third-party application, which means that obtaining realtime results is difficult. We propose the NFP-CPU heterogeneous framework to allow parts of ...Read more