Author:Nkosi, FP; Jafta, CJ; Kebede, Mesfin A; Le Roux, Lukas J; Mathe, Mahlanyane K; Ozoemena, KIDate:Mar 2015Microwave irradiation at the pre- and post-annealing steps of the synthesis of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel cathode materials for rechargeable lithium ion battery is a useful strategy to optimize the average manganese ...Read more
Author:Rohwer, Mark B; Ozoemena, K; Modibedi, Remegia MDate:Nov 2012Fuel cells provide a means for the direct conversion of fuels to electricity. Direct alcohol fuel cells (DAFCs) are particularly attractive because liquid fuels such as methanol or ethanol have a relatively low cost, a high volumetric energy ...Read more
Author:Monchusi, BDate:Oct 2012As part of the ongoing development of novel mining methods, the CSIR has developed alternative methods to break rocks. In this case, we show the application of microwave energy to break narrow tabular ore bodies.Read more
Author:Oboirien, BO; North, Brian C; Sadiku, ERDate:Sep 2013Fluidised bed gasification (FBG) is a clean coal technology suitable for power and fuel generation from low grade coals. However, the resulting bottom ash presents some disposal challenges to the power plants and the environment. The production ...Read more
Author:Jafta, CJ; Mathe, Mahlanyane K; Manyala, N; Roos, WD; Ozoemena, KIDate:Aug 2013The LiMn1.5Ni0.5O4 spinel is an important lithium ion battery cathode material that has continued to receive major research attention because of its high operating voltage (∼4.8 V). This study interrogates the impact of microwave irradiation ...Read more
Author:Mathe, Ntombizodwa R; Scriba, Manfred R; Rikhotso, Rirhandzu S; Coville, NJDate:2017Bimetallic Pt–Ni nanoparticles were synthesized for use as electrocatalysts for the methanol oxidation reaction using a cost-effective microwave-irradiation synthesis procedure that offers precise temperature control. By varying the concentration ...Read more
Author:Henshilwood, C; D'Errico, F; Vanhaeren, M; Van Niekerk, K; Jacobs, ZDate:16 Apr 2004There are two competing models for the emergence of modern human behaviour: first, a late emergence in Africa or Eurasia similar to 50 to 40 thousand years ago and second, and a gradual transition in Africa between 250 to 50 ka. The earliest ...Read more
Author:Duvenhage, B; Kourie, DGDate:Jul 2007A legacy non-distributed logical time simulator is migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism is retained to simplify the reuse of existing models. ...Read more
Author:Duvenhage, BDate:Sep 2007A legacy non-distributed logical time simulator was previously migrated to a distributed architecture to parallelise execution. The existing Discrete Time System Specification (DTSS) modelling formalism was retained to simplify the reuse of ...Read more
Author:Van Heerden, AdelaiDate:Dec 2016The African life philosophy of ubuntu is about two aspects ubu and ntu, and constitutes a wholeness and oneness (Ramose, 2002).1 Modern psychology has until very recently entailed oneness with its Western ideas and approaches (Sinha, 1986).2 ...Read more
Author:Carpenter, SR; DeFries, R; Dietz, T; Mooney, HA; Polasky, S; Reid, WV; Scholes, RJDate:Oct 2006The Millennium Ecosystem Assessment (MA) was designed to meet the needs of decision-makers for scientific information on the consequences of ecosystem change for human well-being. Even though the intended audience is decision-makers, the ...Read more
Author:Dudley, Angela L; Nock, M; Konrad, T; Roux, FS; Forbes, ADate:Oct 2010An amplitude damping channel for Laguerre-Gaussian (LG) modes is presented. Experimentally the action of the channel on LG modes is in good agreement with that predicted theoretically.Read more
Author:Kgarume, Thabang EDate:Nov 2010A methodology of assessing the seismic hazard associated with aftershocks is developed by performing statistical and deterministic analysis of seismic data from two South African deep-level gold mines. A method employing stacking of aftershocks ...Read more
Author:Du Plessis, JAKDate:1965The methods of preventing mine explosions are well known to coal mine workers but virtually all explosions are the result of human fallibility, that is, carelessness and the disobeying of the safety rules.Read more
Author:Van Aswegen, G; Mendecki, AJDate:Jan 1993In the present study, a method is proposed method to estimate strong ground motion from possible large events. The method was demonstrated in two ways. Firstly, the magnitude of ground motion was estimated at distances away from a vertical ...Read more
Author:Green, JDate:Oct 2013Mine rescue robotics is an area of research and development that has had some attention in the past, but has been bypassed in development by urban search and rescue, where the conditions could arguably be classified as less extreme. The safety ...Read more
Author:Dickens, J; Teleka, RuthDate:Oct 2013The South African mining industry is plagued by accidents, the most common of which are rock falls. In order to carry out its mandate of improving the quality of life of South African citizens, the Council for Scientific and Industrial Research ...Read more