Author:Lemmen, CHJ; Van Oosterom, PJM; Uitermark, HT; Zevenbergen, JA; Cooper, Antony KDate:Sep 2011This paper provides a brief overview of one of the first spatial domain standards: a standard for the domain of Land Administration (LA). This standard is in the draft stage of development now (May 2011). The development of domain standards ...Read more
Author:Robinson, GA; Turpie, DWFDate:Oct 1979Three matched lots of wools derived from various growing regions of South Africa and marketed in Durban, Port Elizabeth and Cape Town respectively have been processed, spun and when woven into identical fabrics.Read more
Author:Murray, K; Claassen, MariusDate:Oct 1999In order to facilitate a common understanding, on-going debate and increasing application of ecological risk assessment (ERA) in South Africa, the ERA process of the US Environmental Protection Agency (EPA) has been summarised and evaluated ...Read more
Author:Jacobs, Z; Duller, GAT; Wintle, AGDate:Mar 2006Recent development of an instrument for measuring the optically stimulated luminescence signal from individual mineral grains has made it practicable to measure the equivalent dose (De) from many hundreds or thousands of single mineral grains ...Read more
Author:Faccer, K; Nahman, Anton; Audouin, Michelle ADate:May 2014The green economy concept promises to provide a concrete roadmap to the implementation of sustainable development while delivering significant social and economic benefits and reduced environmental risks. However, the concept of a green ...Read more
Author:Kriek, M; Monyai, K; Magcwebeba, TU; Du Plessis, N; Stoychev, SH; Tabb, David LDate:May 2020The increasing amount of publicly available proteomics data creates opportunities for data scientists to investigate quality metrics in novel ways. QuaMeter IDFree is used to generate quality metrics from 665 RAW files and 97 WIFF files ...Read more
Author:Botes, AL; Lotter, J; Rhode, OHJ; Botha, ADate:Jan 2005Isolates representing Cryptococcus laurentii and Cryptococcus podzolicus, originating from soil of a heath land indigenous to South Africa, were screened for the presence of enantioselective epoxide hydrolases for 2, 2-disubstituted epoxides. ...Read more
Author:Terblanche, L; Diedericks, G; Smit, F; Troch, Christophe NADate:May 2018In this study the velocity field measurement of monochromatic waves traversing an idealised porous medium was conducted. A two-dimensional, rectangular porous structure was built from timber beams and arranged in a non-staggered array. The ...Read more
Author:Venter, KarienDate:May 2010Road safety is a core problem that the South African government battle with year-on year. One of the areas where South Africa has sadly been lacking behind is within the field of road and traffic psychology. This is despite the fact that ...Read more
Author:Focke, RW; De Villiers, JP; Inggs, MRDate:May 2015Interval Algebra provides an effective means to schedule surveillance radar networks, as it is a temporal ordering constraint language. Thus it provides a solution to a part of resource management, which is included in the revised Data Fusion ...Read more
Author:Focke, RW; De Villiers, Johan P; Inggs, MRDate:May 2015Interval Algebra provides an effective means to schedule surveillance radar networks, as it is a temporal ordering constraint language. Thus it provides a solution to a part of resource management, which is included in the revised Data Fusion ...Read more
Author:Van Niekerk, DR; Barnard, EDate:Sep 2010The authors present an initial investigation into the acoustic realisation of tone in continuous utterances in Sepedi (a language in the Southern Bantu family). An analytic model for the generation of appropriate pitch contours given an ...Read more
Author:Naidoo, Darryl; Forbes, A; Aït-Ameur, K; Fromager, MDate:Jan 2011A method of decomposing a dual-directional laser beam into a forward propagating field and a backward propagating field for an apertured plano-concave cavity is presented. An intra-cavity aperture is a simple method of laser beam shaping as ...Read more
Author:Ngcobo, Sandile; Ait-Ameur, K; Forbes, ADate:Aug 2012This work deals with the generation of symmetrical high order Laguerre Gaussian modes. These high order Laguerre-Gaussian beams are generated by forcing the laser using an annular binary Diffractive Optical Element whose geometry is in ...Read more
Author:Naidoo, Darryl; Aït-Ameur, K; Brunel, M; Forbes, ADate:2012In this paper we demonstrate experimentally the intra-cavity generation of a coherent superposition of Laguerre–Gaussian modes of zero radial order but opposite azimuthal order. The superposition is created with a simple intra-cavity stop ...Read more
Author:Naidoo, Darryl; Litvin, I; Laskin, A; Forbes, ADate:Feb 2014We explore an intra-cavity beam shaping approach to generate a Gaussian distribution by the metamorphosis of a Gaussian beam into a flat-top distribution on opposing mirrors. The concept is tested external to the cavity through the use of two ...Read more
Author:Naidoo, Darryl; Aït-Ameur, K; Forbes, ADate:Aug 2011In this paper the authors explore vortex beams and in particular the generation of single LG0l modes and superpositions thereof. Vortex beams carry orbital angular momentum (OAM) and this intrinsic property makes them prevalent in transferring ...Read more
Author:Litvin, IA; Khilo, NA; Forbes, A; Belyi, VNDate:Aug 2009In this paper the researchers report on two resonator systems for producing LDBLBs with arbitrary initial parameters. First resonator system is based on doublet of divergence and convergence lenses with spherical aberration. Second resonator ...Read more
Author:Litvin, IA; Loveday, Philip W; Long, Craig S; Kazak, NS; Belyi, V; Forbes, ADate:Aug 2008There are many applications in which a laser beam with a flat–top intensity profile would be ideal, as compared to a laser beam with a non–uniform energy distribution. Standard stable optical resonators will unfortunately not generate such a ...Read more
Author:Mthunzi-Kufa, Patience; Lee, WM; Riches, AC; Brown, CTA; Gunn-Moore, FJ; Dholakia, KDate:May 2010Optical micromanipulation of transparent microparticles such as cellularmaterials relies upon the application of optical forces that are crucially dependent on the refractive index contrast between the particle and the surrounding medium. We ...Read more