Author:Botha, Anton F; Roux, JADate:Nov 2008South Africa has over 4 million indigenous goats (Boer, Savannah and Nguni/Mbusi breeds), many of which have two coats of fibre, namely a cashmere-like fine down and a coarse guard hair. These goats are primarily kept for their meat, milk and ...Read morecb
Author:Vieira, R; van den Bergh, F; van Wyk, BJDate:Nov 2008This paper presents a fiducial-based approach to monitoring the movement of breakwater armour units in a model hall environment. Target symbols with known dimensions are attached to the physical models, allowing the recovery of three-dimensional ...Read more
Author:Everson, CS; Mengistu, MG; Gush, Mark BDate:Dec 2012Global attention on biofuels and the potential for Jatropha curcas to produce biodiesel from marginal land with low inputs has recently created world-wide interest in this species. This paper reports on the water dynamics and productivity of ...Read more
Author:Kesavan Pillai, Sreejarani; Motshekga, SC; Ray, SS; Kennedy, JDate:2012SnO2/CNT composites were prepared by microwave assisted wet impregnation at 60 °C. The process was optimized by varying the microwave power and reaction time. Raman analysis showed the typical features of the rutile phase of as-synthesized ...Read more
Author:Balmaceda, P; De Beer, MorrisDate:1992A methodology for evaluating the condition of jointed portland cement concrete pavements (JCP) by non-destructive deflection testing was recently applied on the National Route 4 (N4) between Middelburg and Witbank. A set of two calibrated ...Read more
Author:Basappa Ayanna, Manjunath; Mkasi, Hlaluku W; Pratt, Lawrence E; Roro, Kittessa TDate:Nov 2019This study presents the initial results of field performance analysis conducted on bi-facial modules installed on a fixed tilt rack and dual axis tracker system in Pretoria, South Africa. Bifacial modules produce better energy yield compared ...Read more
Author:Debba, Pravesh; Stein, A; Van der Meer, FD; Carranza, EJM; Lucieer, ADate:Jun 2008This paper presents a statistical method for deriving the optimal prospective field sampling scheme on a remote sensing image to represent different categories in the field. The iterated conditional modes algorithm (ICM) is used for segmentation ...Read more
Author:Debba, PraveshDate:Oct 2010This chapter discusses the methodology of using simulated annealing in deriving optimal sampling schemes to target a specific mineral, for example, alunite.Read more
Author:Reitmaier, T; Bidwell, NJ; Marsden, GDate:Sep 2010We describe and reflect on a method we used to evaluate usability and give insights on situated use of a mobile digital storytelling prototype. We report on rich data we gained by implementing this method and argue that we were able to learn ...Read more
Author:Ittmann, HW; King, DDate:2008The theme for 2007’s survey was logistics for regional growth and development and the leading role South Africa plays in the southern African region in terms of economic and logistics development. 2008’s theme is somewhat more inward-looking ...Read more
Author:Nabarro, FRNDate:30 Aug 1997The origin of the Peierls model and its relation to that of Frenkel and Kontorova are described. Within this model there are three essentially different formulae for the stress required to move a dislocation rigidly through a perfect lattice, ...Read more
Author:Venter, JP; Nare, SDate:Nov 2008The rapid development and use of information and communication technology (ICT) has influenced everyday life, mostly in a positive manner. This technology is, however, also available to the criminally minded. Activities performed through ICT ...Read more
Author:Mathekga, Mmamolatelo EDate:Oct 2015The ease with which the green South African ID book could be forged has led to many instances of identity fraud, costing retail businesses millions in lost revenue on fraudulently created credit accounts. This has led the government, through ...Read more
Author:Cronje, JDate:Nov 2012The US Patent and Trademark Office, together with the NASA Tournament Lab, launched a contest to develop specialized algorithms to help bring the seven million patents presently in the patent archive into the digital age. The contest was ...Read more
Author:Roberts, DEDate:Dec 2013We derive from first principles an analytical expression for a figure of merit (FM) for a selective solar absorber in a single glazed flat plate water heater. We first show that the efficiency of a collector with an absorber with absorptance ...Read more
Author:Beyers, CDate:Dec 2006This article proposes a figure ground analogy as alternative way of conceptually integrating sustainability and planning. Within this framework planners are challenged to creatively consider planning practice and thought against a background ...Read more