Author:Ntlatlapa, Ntsibane S; Dlodlo, NDate:Nov 2012Broadband access has not reached all corners of South Africa, and yet the need to deliver multimedia education content to all schools in the country remains the same. Low-cost, appropriate technologies would enable schools in areas that would ...Read more
Author:Dudley, Angela L; Forbes, ADate:May 2014This study reports on the presentation of the second international conference on applications of optics and photonics: Digitally controlling the ‘twist’ of light.Read more
Author:Van der Molen, JDate:Jun 2008This presentation gives the background of the Diatom collection as well as an overview of the collection content. The two phases of the digitisation process are described in detailRead more
Author:Botha, Adèle; Herselman, Martha E; Musgrave, S; Jaeschke, GDate:Oct 2017The aim of this paper is to describe the adaption and scaled application of a Teacher Professional Development (TPD) course, towards, not only changing classroom practice, but empowering teachers to become lifelong learners. The ICT for Rural ...Read more
Author:Van der Merwe, JP; Van Rooyen, ADate:Jan 1971Knitted all wool fabrics were treated with synthappret LKF, autoclave steamed after evacuation and finally tested for dimensional stability.Read more
Author:Van Heerden, N; Silver, HMDate:Mar 1975Wool tops were chlorinated and them acrylic staple fibres to produce blends of 75 % wool/25% acrylic and 60% wool/40% acrylic satin single jersey fabrics produced from the blends were machine-washable after autoclave decatising.Read more
Author:Joyce, LB; Pitcher, GC; Du Randt, A; Monteiro, Pedro MSDate:Feb 2005The distribution and abundance of dinoflagellate cysts from recent coastal sediments in Saldanha Bay, was investigated, and compared to the cyst assemblages of the adjacent coastal upwelling system as reflected in the sediments of Lambert's ...Read more
Author:Esser, MJD; Preussler, DR; Bernhardi, EH; Bollig, C; Posewang, MDate:Oct 2009High power operation at 1818 and 1915 nm has been demonstrated from a Tm:GdVO4 laser operating in quasi-continuous-wave mode with a maximum measured power of 8.7Wand a laser output energy of 175 mJ was observed in a 20 ms pulse at 1.9 µm. The ...Read more
Author:Meyer, T; Moodley, K; Sattler, UDate:Jul 2014The preferential approach to nonmonotonic reasoning was consolidated in depth by Krause, Lehmann and Magidor (KLM) for propositional logic in the early 90's. In recent years, there have been efforts to extend their framework to Description ...Read more
Author:Simpson, BRS; Morris, WMDate:Feb 2004The measurement of Mn-54 and Zn-65 by liquid scintillation coincidence counting results in low detection efficiencies. The activity obtained from the extrapolation of efficiency data can therefore become problematic if curvature is present. ...Read more
Author:Esser, MJD; Bollig, C; Preussler, DRDate:2006In this work, the thermal lenses generated in diode-end-pumped Nd:YVO4 and Nd:GdVO4 lasers were evaluated and compared using a simple technique based on the stability criteria of a plane-parallel laser resonator [example 1], as shown in the ...Read more
Author:Bollong, CA; Vogel, JC; Jacobson, L; Van der Westhuizen, WA; Sampson, CGDate:Jan 1993Several 14C dates have been obtained from the fibre temper in cooking bowls made by the forbears of the Zeekoe River Bushmen (Basarwa), South Africa. Although the temper appears to be burned grass, the Q (13) C values do not match those of ...Read more
Author:Adesina, AJ; Kumar, KR; Sivakumar, V; Griffith, DDate:01 Dec 2014The present study uses the data collected from Cimel Sunphotometer of Aerosol Robotic Network (AERONET) for the period from January to December, 2012 over an urban site, Pretoria (PTR; 25.75°S, 28.28°E, 1449 m above sea level), South Africa. ...Read more
Author:Morrison, A; Hietkamp, S; Van Vuuren, DSDate:Aug 2004A direct reduction process for refractory oxides and a life cycle analysis comparison with conventional pelletising and sintering process for chargechrome are presented. The new route has potential to reduce the environmental impact of the ...Read more
Author:Molobi, E; Sacks, N; Theron, MarithaDate:Nov 2021In this study a cemented tungsten carbide rotary burr prototype was fabricated using directed energy deposition based on an optimal parameter set which was previously derived from a full factorial design of experiments matrix approach. Finite ...Read more
Author:Kruger, A; Goliger, Adam M; Retief, JDate:Jul 2013Directional statistics provide design engineers with the opportunity to realise considerable cost savings, but these are not yet provided for in the South African standard for wind loading. The development of the directional statistics of ...Read more
Author:Greyling, T; Huntley, BJDate:Dec 1984This Directory provides detailed information on 155 conservation areas of greater than 1 000 ha administered by government and statutory bodies in the Republics of South Africa, Transkei, Bophuthatswana, Ciskei and Venda, and the Kingdoms of ...Read more
Author:Napier, Mark; Coulson, J; Matsebe, GNDate:2006This chapter is based on work undertaken for an international comparative study on 'enable environments' which included case studies in Pretoria (South Africa) and New Dehli (India), with the focus being the four case study settlements in the ...Read more