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Now showing items 5301-5320 of 9132
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(Royal Society of Chemistry, 2015-03)Microwave 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 ...
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(2012-11)Fuel 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 ...
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(2012-10)As 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.
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(2013-09)Fluidised 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 ...
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(ACS Publications, 2013-08)The 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 ...
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(Royal Society of Chemistry, 2016-04)The well-established poor electrochemical cycling performance of the LiMn(sub2)O(sub4) (LMO) spinel cathode material for lithium-ion batteries at elevated temperature stems from the instability of the Mn(sup3+) concentration. ...
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(Springer, 2017)Bimetallic 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 ...
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(American Association for the Advancement of Science, 2004-04-16)There 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 ...
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(Summer Computer Simulation Conference 2007, 2007-07)A 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 ...
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(2007-09)A 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 ...
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(Stellenbosch University, Faculty of Military Science (Military Academy), 2016-12)The 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 ...
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(American Association for the Advancement of Science (AAAS), 2006-10)The 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 ...
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(Optical Society of America, 2010-10)An 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.
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(University of the Witwatersrand, 2010-11)A 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 ...
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(1993-01)In 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 ...
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(IEEE Xplore, 2013-10)Mine 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 ...
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(IEEE Xplore, 2013-10)The 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 ...
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(The Icfai University Press, 2009)Acid Mine Discharge (AMD) is a contaminated waste generated out of the mining activities both during and after the operation period. AMD has adverse impact on the socio-economic conditions of the people residing in and ...
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(Department of Environmental Affiars and Tourism (DEAT), 2008-07)A major environmental problem relating to mining in many parts of the world is uncontrolled discharge of contaminated water (or decant) from abandoned mines. This document provides information on emerging issues that may ...
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(Pergamon-Elsevier Science Ltd, 1995-09)Mining results in seismic activity of varying intensity, from small micro seismic events to larger seismic events, often associated with significant seismic induced damages. This work deals with the understanding of the ...
Now showing items 5301-5320 of 9132
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