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
Author:Hlabela, Simon P; Harribhai, Jatin; Seboqa, MogauDate:Mar 2016South Africa is a developing country and has made its mark as one of the major maritime countries in Africa and the world. For it to compete internationally the ports of South Africa have to maintain an international standard it terms of ...Read more
Author:Bischof-Niemz, TDate:Feb 2015South Africa’s power system is currently under severe constraints, with power generators meant to be the “barely-ever-used” safety net for the system (diesel-fired gas turbines) running at > 15% average annual load factor, and with one ...Read more
Author:Bischof-Niemz, TobiasDate:Feb 2015This study addressed the questions how much fuel costs the first 1 600 MW of wind & PV have saved during the year 2014 (by reducing utilisation of diesel-fired gas turbines & of the expensive part of the coal fleet) & how much of “unserved ...Read more
Author:Calitz, Joanne R; Mushwana, Crescent; Bischof-Niemz, Sebastian TDate:Aug 2015The report provides the presentation of the financial benefits of renewables in South Africa in 2015. South Africa’s power system is currently under severe constraints. At the same time, Department of Energy is procuring new generation capacity ...Read more