Author:Noble, RGDate:Jun 1976The importance of solid wastes management in environmental pollution control cannot be over-emphasised. Increased socio-economic development in South Africa has brought with it increasing volumes of urban, industrial and agricultural wastes, ...Read more
Author:Sha, G; Moller, H; Stumpf, WE; Xia, JH; Govender, G; Ringer, SPDate:Jan 2012The solute nanostructures formed in the primary a-Al grains of a semi-solid metal cast Al–7Si–0.6Mg alloy (F357) during ageing at 180°C, and the age-hardening response of the alloy, have been systematically investigated by transmission electron ...Read more
Author:Lebelo, RS; Fedotov, I; Shatalov, MDate:Sep 2008In this paper, the method of approximating solutions of partial differential equations with variable coefficients is studied. This is done by considering heat flow through a one-dimensional model with variable cross-sections. Two cases are ...Read more
Author:McDonald, Andre M; Van Wyk, MDate:Aug 2017A novel solution of the inverse Frobenius–Perron problem for constructing semi–Markov chaotic maps with prescribed statistical properties is presented. The proposed solution uses recursive Markov state disaggregation to construct an ergodic ...Read more
Author:Kebede, Mesfin A; Phasha, MJ; Kunjuzwa, N; Mathe, Mahlanyane K; Ozoemena, KIDate:Jun 2015High-performing (LiAl(subx)Mn(sub2-x)O(sub4) (x = 0, 0.125, 0.25, 0.375, and 0.5) spinel cathode materials for lithium-ion battery were developed using a solution combustion method. The as-synthesized cathode materials have spinel cubic ...Read more
Author:Kebede, Mesfin A; Kunjuzwa, N; Jafta, CJ; Mathe, Mahlanyane K; Ozoemena, KIDate:2014Spherically shaped Ni-substituted LiNi(subx)Mn(sub2-x)O(sub4) (x=0, 0.1, 0.2) spinel cathode materials for lithium ion battery with high first cycle discharge capacity and remarkable cycling performance were synthesized using the solution-combustion ...Read more
Author:Maphoru, MV; Heveling, J; Kesavan Pillai, SreejaraniDate:Aug 2015Using H(sub2)O(sub2) as the oxidant, 1-naphthols with electron-donating groups at the 2- and 4-positions couple oxidatively over a carbon-supported platinum catalyst to 3,3'-substituted 1,1'-binaphthalenylidene-4,4'-diones and 4,4'-substituted ...Read more
Author:Meissner, HD; Mclver, BADate:Aug 1974A method is described for dyeing wool with reactive dyes from perchloroethylene utilizing the solvent soluble complex of the dye and a surface-active agent of opposite charge.Read more
Author:Greeff, M; Engelbrecht, APDate:Jun 2008Many optimisation problems are multi-objective and change dynamically. Many methods use a weighted average approach to the multiple objectives. This paper introduces the usage of the vector evaluated particle swarm optimiser (VEPSO) to solve ...Read more
Author:Bello, O; Abu-Mahfouz, Adnan MI; Haman, Y; Page, Philip R; Adedeji, KB; Piller, ODate:Mar 2019Modern water distribution networks (WDNs) are complex and difficult to manage due to increased level of urbanization, varying consumer demands, ageing infrastructure, operational costs, and inadequate water resources. The management problems ...Read more
Author:Albertyn, J; Cheng, L; Abu-Mahfouz, Adnan MIDate:Nov 2020Increasing electricity prices in South Africa and the imminent threat of load shedding due to the overloaded power grid has led to a need for Demand Side Management (DSM) devices like smart grids. For smart grids to perform to their peak, ...Read more
Author:Strydom, MADate:May 1974A laboratory method for dyeing basic dyeable acrylic fibres from a "charged" perchhloroethylene dyebath is described.Read more
Author:Barkenhuysen, FA; Van Rensburg, NJJDate:Oct 1982Some chemical properties of various South African cotton cultivars, and their response to mercerising treatments were determined.Read more
Author:Hunter, L; Turpie, DWFDate:Jun 1974The influence of polyester type in wool/polyester, and of different additives on the end breakage rate during spinning and on the physical properties (tensile, irregularity and frequency of faults) of the resulting yarns has been investigated.Read more
Author:Van Zwieten, ACTM; Bulloch, JHDate:Feb 1993The present paper has attempted to briefly review the factors that influence the toughness properties of ferritic stainless steels. The structure and constitution of ferritic stainless steels were discussed together with the effects of second ...Read more
Author:Bowles, BA; Attwell, CWPDate:Nov 1978This report presents a comparison of the three capacitive matching networks most commonly used with electrically small loop antennas. The three networks are considered as special cases of a universal capacitive matching network which together ...Read more
Author:Hunter, LDate:May 1975The dimensional properties and knitting performance of four double jersey structures. Single Pique, Royal Interlock, Pin-tuck and Texi-pique, have been investigated.Read more