Author:De Waal, A; Barnard, EDate:Nov 2008Topic models are unsupervised techniques that extract likely topics from text corpora, by creating probabilistic word-topic and topic-document associations. Evaluation of topic models is a challenge because (a) topic models are often employed ...Read more
Author:Mudali, P; Mutanga, MB; Adigun, MO; Ntlatlapa, Ntsibane SDate:Jun 2011Infrastructure Wireless Mesh Networks (I-WMNs) are increasingly used to bridge the digital divide in rural areas around the world. Rural African areas in particular require energy efficient I-WMNs as the nodes comprising the I-WMN backbone ...Read more
Author:Moloja, D; Mpekoa, Noluntu; Van Greunen, DDate:Sep 2020The developments in Information and Communication Technology transformed almost every aspect of everyday life. Modern societies are now fully dependent on ICT for commercial, labor, and leisure activities, excluding in the voting area. Using ...Read more
Author:Van der Vyver, AG; Marais, Mario ADate:Nov 2013This paper contains a report on the uses, expectations and gratifications experienced by the users of digital doorways. The researchers adopted a grounded theory approach in their analysis of 200 narratives collected from the users. The stories ...Read more
Author:Cho, Moses A; van Aardt, J; Main, Russell S; Majeke, BDate:Apr 2010Remote sensing is viewed as a cost-effective alternative to intensive field surveys in assessing site factors that affect growth of Eucalyptus grandis over broad areas. The objective of this study was to assess the utility of hyperspectral ...Read more
Author:Stacey, TR; Wesseloo, JDate:Jun 1998This report describes such a record, which has been compiled into a computer database. Data on stress measurements and observations have been obtained, evaluated, reanalyzed where necessary, and graded. The project described in this report ...Read more
Author:Pieterse, Heloise; Oliver, DM; Van Heerden, Renier PDate:Jun 2019Ever improving technology allows smartphones to become an integral part of people’s lives. The reliance on and ubiquitous use of smartphones render these devices rich sources of data. This data becomes increasingly important when smartphones ...Read more
Author:Schoonees, JS; Theron, AKDate:May 1995Cross-shore sediment transport models are used to model beach profile changes in order to determine, for example, coastal set-back lines, behaviour of beach fill and beach profile variations adjacent to coastal structures. A study was undertaken ...Read more
Author:Anochie-Boateng, Joseph; Komba, Julius J; Makulenga, N; Maharaj, ADate:Aug 2010A new three-dimensional (3D) laser scanning device has been acquired by CSIR Built Environment to determine rock aggregates shape and surface properties. The overall objective is to employ laser-based techniques to accurately determine ...Read more
Author:Mawela, KGDate:10 Oct 2012This presentation explains the role of 5P12-RANTES and its low-cost production as a promising topical microbicide.Read more
Author:Bester, Duwan C; Wichers, H; Moller HeinrichDate:Nov 2017Powder Bed Fusion (PBF) is an Additive Manufacturing process which builds parts, layer by layer, by melting the cross-section of the part onto a powder layer. Aeroswift is a PBF machine, designed and built in South Africa. A powder scraper ...Read more
Author:Ramulifho, RD; Gupta, K; Glaser, DanielDate:Sep 2022Additive Manufacturing (AM) of titanium (Ti6Al4V) material using Selective Laser Melting (SLM) may generate significant residual stresses of a tensile nature, which can cause premature component failure. The Aeroswift platform is a large ...Read morecbna
Author:Pindihama, GK; Gumbo, JR; Oberholster, Paul JDate:Dec 2011South Africa is a water scarce country with freshwater resources that are deteriorating mostly due to anthropogenic activities. Several dams in South Africa are eutrophic and present potential health risks to water consumers and users. ...Read more
Author:Rust, FC; Akhalwaya, Imraan; Jordaan, GJ; Du Plessis, LDate:Oct 2019This paper describes the findings of a Heavy Vehicle Simulator (HVS) test on road D1884 in the Gauteng province of South Africa. The pavement structure was rehabilitated using an anionic nano-silane modified bitumen emulsion stabilising agent ...Read more
Author:Nordengen, Paul A; Roux, Michael PDate:Nov 2013As a result of successful initiatives in Australia, New Zealand and Canada, the introduction of a performance-based standards (PBS) approach in the heavy vehicle sector in South Africa was identified by the Council for Scientific and Industrial ...Read more
Author:Pancham, Ardhisha; Withey, Daniel J; Bright, GDate:Mar 2018Simultaneous Localization And Mapping (SLAM) assumes a static environment. In a dynamic environment, the localization accuracy and map quality of SLAM may be degraded by moving objects. By removing these moving objects SLAM performance may ...Read more
Author:Pretorius, R; Theron, CC; Marais, TK; Ras, HADate:Nov 1993The effective heat of formation model allows heats of formation to be calculated as a function of the concentration of the reactants at the growth interface. The effective concentration is taken to be the concentration of the liquidus minimum ...Read more
Author:Amigun, BDate:Nov 2009Biofuels are Liquid, solid and gaseous fuel derived from organic matter-biomass-including plant materials and animal waste. This paper is about the state of biofuels in Africa and the initiatives thereof.Read more