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
Author:Doornum, GAWDate:1949Utilization of the Union's low grade coal reserves may be considered to be of great importance for the industrial development of the country, and the generation of electric power at the pithead shows a way in which this can be accomplished. ...Read more
Author:Fuel Research Institute BoardDate:1962The FRI Board greatly appreciates the opportunity to place certain views about the proposed Atmospheric Pollution Prevention Bill before the Honorable, the Minister of Health.Read more
Author:Roberts, MBDate:May 1977The effect of common processing conditions such as dry heat, steam aqueous treatments of different pH and oxidising agents upon the mohair fibre was examined in terms of changes in mass loss.Read more
Author:Mhlongo, MD; Moitsheki, RJDate:May 2014One-dimensional steady-state heat transfer in fins of different profiles is studied. The problem considered satisfies the Dirichlet boundary conditions at one end and theNeumann boundary conditions at the other.Thethermal conductivity and ...Read more
Author:Greben, JMDate:Jul 2006Complexity science is often seen as the science of emerging non-linear phenomena. In this paper the authors discuss some emerging aspects of non-linear solutions in physics. These solutions owe their elegance and simplicity to the complex ...Read more
Author:Cooper, Antony K; Schmitz, PDate:Jan 2002This paper presents a few examples of tactical crime mapping and analysis done by the Council for Scientific and Industrial Research (CSIR) and the South African Police Service (SAPS). In these cases, the police had already arrested the ...Read more
Author:Tromp, FJDate:1941The object of this paper is to examine the feasibility of making blends of alcohol with standard petrol which can be used alternatively with standard petrol in ordinary motor cars without special engine adjustments.Read more
Author:Benson, JM; Reeves, A; Lagrange, SGDate:Jun 1998Failure analyses of various engine and airframe components from South African Air Force aircraft have been performed by the Division of Materials Science and Technology over several years and these have ranged from crash investigations to ...Read more
Author:De Beer, Morris; Maina, JWDate:Jul 2008This paper is a brief introduction to some of the well known fundamental engineering properties of homogeneous isotropic linear elastic materials. It specifically shows the relationships between different elastic moduli. It covers some of the ...Read more