Author:Ngcobo, Sandile; Litvin, I; Burger, L; Forbes, ADate:Aug 2013Customizing the output beam shape from a laser invariably involves specialized optical elements in the form of apertures, diffractive optics and free-form mirrors. Such optics require considerable design and fabrication effort and suffer from ...Read more
Author:Bell, Teboho; Ngcobo, SandileDate:Jul 2016In this paper we demonstrate the output power amplification of the generated higher-order modes from a digital laser by using an extra-cavity Nd: YAG amplifier.Read more
Author:Forbes, A; Ngcobo, Sandile; Burger, L; Litvin, IADate:Feb 2014In this paper we will outline our recent advances in all-digital control of light. Importantly, we will outline how to create
a so-called “digital laser”, where a conventional laser mirror is replaced with a phase-only spatial light modulator. ...Read more
Author:Botha, Adèle; Ford, MDate:Oct 2008Technology has changed the world we live in and has come to be both villified and acclaimed, often for the same reasons. Whilst mobile phones in particular, have tremendous potential as knowledge exchange devices in the developing world due ...Read more
Author:Burger, L; Litvin, I; Forbes, ADate:Jul 2012We describe the performance of twisted nematic liquid crystal (TNLC) spatial light modulators (SLMs) when used for intracavity beam shaping.Read more
Author:van Biljon, J; Marais, Mario A; Platz, MDate:May 2017Research involving the use of information and communication technology for development (ICT4D) inhabits an interdisciplinary space characterized by various philosophies, aspirations, realities and priorities. This diversity in the ICT4D ...Read more
Author:Marsden, G; Ladeira, I; Reitmaier, T; Bidwell, NJ; Blake, EDate:Sep 2010In this paper the authors examine how digital technology can be used to inspire, record and present oral stories in an African context. In particular they explore how to create technologies that are sympathetic to the cultures of the storytellers, ...Read more
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