Author:Oelofse, Suzanna HH; Strydom, WFDate:Sep 2010Waste recycling in South Africa is largely industry driven with the focus to date having been on pre-consumer recovery and recycling from business and industry. With a very young pro-environmental consciousness in South Africa, limited ...Read more
Author:Isong, B; Manuel, M; Dladlu, N; Abu-Mahfouz, Adnan MIDate:Nov 2023The growing application of wireless sensor networks (WSN) has unveiled several opportunities for innovative services and data-driven applications. However, the WSN's inherent vulnerabilities and challenges have raised considerable concerns ...Read more
Author:Smith, Simone MDate:Jul 2018This paper investigates the link between the rationales between piracy attacks, the information gathered from such incidents and if the same information may be used to address the rationale behind piracy to combat and prevent it. A common ...Read more
Author:Lemmer, Yolandy; Siko, G; Swai, H; Verschoor, JDate:Aug 2009This poster is the first demonstration of the use of the evanescent field biosensor to show the interaction between low molecular weight ligate/ligand pairs. The authors demonstrated the interaction of Amphotericin B to either immobilized ...Read more
Author:Ngcobo, Sandile; Ait-Ameur, K; Litvin, I; Hasnaoui, A; Forbes, ADate:Feb 2014In this paper we experimentally demonstrate a simple laser cavity that produces spatial tuneable laser modes from a Gaussian beam to a Flat-top beam and a Donut-beam. The laser cavity contains an opaque ring and an adjustable circular aperture ...Read more
Author:Berman, R; Kienhofer, FDate:Sep 2012An ADAMS model of South Africa’s first ever Le Mans car was developed and used to tune the suspension parameters. Validation of the model is to be done by comparing simulation results to those obtained in track testing. The suspension parameters ...Read more
Author:Dunn, Dwain I; Snedden, Glen C; Von Backström, TWDate:Sep 2009In a gas turbine engine secondary flows have a detrimental effect on efficiency. The current numerical study is aimed at determining which turbulence model in a commercially available CFD code is best suited to predicting the secondary flows. ...Read more
Author:Butgereit, L; Coetzee, L; Smith, Andrew CDate:Oct 2011The “Internet of Things” is the paradigm of connecting physical objects (things) with digital intelligence to the Internet. People have been connecting to the Internet for decades. It is only recently that things have been able to connect to ...Read more
Author:Jansen van Rensburg, Gerhardus J; Kok, SDate:Dec 2012Since plasticity is path dependent, it is necessary to properly take into account the deformation, strain rate and temperature history in applications such as crash worthiness and ballistics simulations. To accurately model the evolution of ...Read more
Author:Leigh, L; Helder, D; Behnert, I; Deadman, A; Fox, N; Leloglu, UM; Özen, H; Griffith, DDate:Jul 2011The Tuz Gölü site does demonstrate some challenges for being used as an absolute calibration site. These include: spatial and temporal variability on the order of +/- 0.02, atmospheric transmittance variability on the order of between 0.52 ...Read more
Author:Ramoroka, MT; Masonta, Moshe T; Kliks, ADate:Dec 2015The role of cheap and easy access to various telecommunication facilities is crucial for further community development. Such an observation is of particular importance for the developing countries all over the world since reliable and open ...Read more
Author:Masonta, Moshe T; Lysko, Albert A; Mekuria, FissehaDate:Oct 2012In wireless communication networks, radio frequency spectrum is the most important and very expensive resource. The TV digital
switchover (DSO) will leave a large portion of the TV frequency bands unused, known as TV white space (TVWS). In ...Read more
Author:Louis, DK; Hanson, I; Masonta, Moshe TDate:May 2016This paper introduces the Ghana Technology University College (GTUC) television white space (TVWS) network deployed in Accra, Ghana. The network, which is still work-in-progress, provides Internet connectivity to six Senior High Schools and ...Read more
Author:Mfupe, Luzango P; Mzyece, M; Mekuria, FissehaDate:May 2012Television White Spaces (TVWS) coupled with Dynamic Spectrum Access and Cognitive Radio (DSA-CR) technologies are increasingly viewed as key enablers to the bridging of the digital divide in rural areas. However, in order to realize maximum ...Read more
Author:Lamola, MM; Johnson, David; Lysko, Albert A; Zlobisnky, NatashaDate:Sep 2016Dynamic Spectrum Access (DSA) plays a vital role in opportunistic access to spectrum. A key component of DSA is preventing interference to the incumbent (primary) user from the secondary user. We present the results of an experiment to analyze ...Read more
Author:Lysko, Albert ADate:May 2021This invited talk summarises the key findings related to experimentation with and practics of television white spaces (TVWS).Read more
Author:Botha, G; Barnard, EDate:Nov 2005Many applications of pattern recognition to natural language processing require large text corpora in a specified language. For many of the languages of the world, such corpora are not readily available, but significant quantities of text are ...Read more
Author:Ntshotsho, PhumzaDate:Oct 2015Ntshotsho and her colleagues sought to verify and characterise success in government’s efforts to restore degraded ecosystems through invasive alien plant management. Invasive alien plants pose a significant threat to South Africa’s biodiversity ...Read more
Author:De Beer, Morris; Sadzik, EM; Fisher, C; Coetzee, CHDate:Jul 2005This paper addresses the measurement (i.e. “fingerprinting”) of tyre loading and contact stress patterns associated with slow moving test tyres on the new Heavy Vehicle Simulator (HVS Mk IV+) of Gautrans. The two test tyres used on the HVS ...Read more
Author:De Beer, Morris; Fisher, C; Kannemeyer, LDate:Sep 2004The aim of this paper is to highlight the use of SIM (Stress-In-Motion) technology on typical heavy vehicles found at the N3-TCC (Traffic Control Centre), with illustrative examples on real world trucks on this highway. A summary of the ...Read more