Author:Genthe, Bettina; Kapwata, Thandi; Le Roux, Wouter J; Chamier, Jessica; Wright, Caradee YDate:May 2018Anthropogenic pollution was identified as an environmental problem of concern when, in 2008, dozens of crocodiles died in the Olifants River catchment near the border of South Africa and Mozambique. Given the close proximity of households to ...Read more
Author:Nortje, R; Britz, K; Meyer, TDate:Dec 2013In this paper we investigate module extraction for the Description Logic SRIQ. We formulate modules in terms of the reachability problem for directed hypergraphs. Using inseperability relations, we investigate the module-theoretic properties ...Read more
Author:Chauke, L; Garbers-Craig, AMDate:Jul 2013Interaction between electrolyte and carbon cathodes during the electrolytic production of aluminium decreases cell life. This paper describes the interaction between carbon cathode materials and electrolyte, based on industrial and laboratory ...Read more
Author:Viljoen, GA; Kuhn, AH; Erasmus, TCDate:1974A sample of coal submitted by the Somerset Mining Company was treated in the Institute's coal preparation pilot plant as Pretoria West. The major portion of the relative density float product prepared in the Drewboy washer, was subsequently ...Read more
Author:De Wet, Febe; Muller, P; Van der Walt, C; Niesler, TDate:Aug 2011The authors investigate the effectiveness of using an accepted readability index, the Flesch Reading Ease (FRE) scale, to design prompts for an automatic oral proficiency assessment system. The prompts in question are uttered by the system, ...Read more
Author:Malik, HH; Erasmus, Louwrence D; Pretorius, J-HCDate:Sep 2016The purpose of this study is to explore and gain a broad perspective on the systems engineering methods currently employed at a South African research council. The aim is to question if these methods are ideal by comparing them with their ...Read more
Author:Vetter, C; Dudley, Angela L; Szameit, A; Forbes, ADate:Aug 2017Accelerating waves have received significant attention of late, first in the optical domain and later in the form of electron matter waves, and have found numerous applications in non-linear optics, material processing, microscopy, particle ...Read more
Author:Botha, PB; Semmelink, CJ; Raubenheimer, JDate:Oct 2005"Detrimental carbonation" manifests itself by the loss of cementitious stabilization and the forming of loose powdery layers which lead to debonding of the surfacing. Up till now this was seen to be caused by poor curing techniques by contractors ...Read more
Author:Das, Sonali; Gupta, R; Kanda, PT; Reid, M; Tipoy, CK; Zerihun, MFDate:Dec 2012The real interest rate is a very important variable in the transmission of monetary policy. It features in vast majority of financial and macroeconomic models. Though the theoretical importance of the real interest rate has generated a sizable ...Read more
Author:Unknown authorDate:Nov 2002Solving the environmental problems of industrialised countries will not mean much if your very survival is threatened by the social fall-out of an exploitative economic growth model. One does not fight terrorism and hatred with violence, but ...Read more
Author:Gopal, Ajith K; Wium, ElsmariDate:Aug 2019The application of a modified A-star (A*) global search algorithm and trajectory planner based on the tentacles algorithm approach are investigated for real-time path and trajectory planning on an unmanned ground vehicle operating at a speed ...Read more
Author:Alimi, OA; Ouahada, K; Abu-Mahfouz, Adnan MIDate:Jun 2019In today’s grid, the technological based cyber-physical systems have continued to be plagued with cyberattacks and intrusions. Any intrusive action on the power system’s Optimal Power Flow (OPF) modules can cause a series of operational ...Read more
Author:Sibolla, Bolelang H; Van Zyl, T; Coetzee, SDate:Aug 2023A moving feature is described as a rigid body whose location changes over time (Asahara et al., 2015). Fitted with sensor devices, these features often transmit information about their location, coupled with additional attributes that describe ...Read more
Author:Page, Philip R; Abu-Mahfouz, Adnan MI; Yoyo, SDate:Aug 2016Remote real-time control is currently the most advanced form of pressure management. Here the parameters describing pressure control valves (or pumps) are changed in real-time in such a way to provide the most optimal pressure in the water ...Read more
Author:Abu-Mahfouz, Adnan MI; Hamama, Y; Page, Philip R; Djouani, K; Kurien, ADate:Aug 2016South Africa is a water scarce country with limited water resources and steadily growing water demand. Unacceptably high water losses and non-revenue water threaten our water resource security as well as the financial viability of municipal ...Read more
Author:Osman, Muhammad S; Yoyo, S; Page, Philip R; Abu-Mahfouz, Adnan MIDate:Sep 2016It is known that South Africa is a water scarce country which has been recently been experiencing erratic weather conditions resulting in a constrained water supply. Renewed focus has been placed on water conservation. This study seeks to ...Read more
Author:Abu-Mahfouz, Adnan MI; Hamam, Y; Page, Philip R; Adedeji, KB; Anele, AO; Todini, EDate:Mar 2019The impact of climate change and increasing urbanisation throughout the world has forced water utility managers to increase the efficiency of water resources. Reduction of real (or physical) water losses plays a crucial role in improving the ...Read more
Author:Bachoo, AKDate:Dec 2009Within the context of video surveillance, object and incident detection by an operator is minimized in over- and under-exposed pixels. Multiple different exposures of the same scene can be fused to create a well-balanced and detailed image ...Read more