Author:Millroy, LDate:Feb 2011The term “nucleic acid therapy” encompasses a wide range of technologies for the treatment of a range of plant and animal ailments. As the name implies, it makes use of nucleic acid (either DNA or RNA) as a therapeutic agent. There are six ...Read more
Author:Molapo, R; Barnard, EDate:Nov 2014The purpose of this paper is to address the challenges and describe step-by-step solutions faced when developing an automatic speech recognition system in multilingual societies. We give a brief statistical analysis of the data that have been ...Read more
Author:Meyers, Bronwyn C; Grobler, Jan-Hendrik; Snedden, GCDate:Sep 2022A combustor was designed for a 200N micro-gas turbine for the model aircraft industry using the NREC design method. Multiple designs resulted which varied in terms of annular area split configuration, hole area splits and relative hole ...Read more
Author:Loveday, PW; Long, Craig SDate:Nov 2022Guided wave ultrasound has been used to continuously monitor welded rail track by transmitting guided wave ultrasound between alternate transmit and receive stations along the rail. A section of rail was encountered where transmission was not ...Read more
Author:Long, Craig S; Loveday, Philip WDate:Apr 2012The analysis of travelling waves in elastic waveguides with complex cross-sections, such as train rails, can only conveniently be performed numerically. The semi-analytical finite element (SAFE) method has become a popular tool for performing ...Read more
Author:Motsepe, K; Fedotov, I; Shatalov, M; Joubert, SVDate:Sep 2008Students of mathematical physics, engineering, natural and biological sciences sometimes need to use special functions that are not found in ordinary mathematical software. In this paper a simple universal numerical algorithm is developed to ...Read more
Author:Long, Craig S; Loveday, Philip WDate:Jan 2014A guided wave based monitoring system for welded freight rail, has previously been developed. The existing system was designed to only detect complete breaks. Current research efforts are focused on including a pulse-echo mode of operation ...Read more
Author:Dunn, Dwain I; Von Backström, TWDate:Aug 2011Turbine manufacturers are continually striving to improve turbine performance, and thus reduce emissions, which has been accelerated with the inception of the Kyoto protocol. One of the areas that have received attention is the controlling ...Read more
Author:Long, Craig S; Loveday, Philip W; Forbes, A; Land, KDate:Jan 2010For intra-cavity laser beam control, a small, low-cost deformable mirror is required. This mirror can be used to correct for time- dependent phase aberrations to the laser beam, such as those caused by thermal expansion of materials. A ...Read more
Author:Long, Craig S; Loveday, Philip WDate:Sep 2012The semi-analytical finite element (SAFE) method has become a popular tool for the analysis of elastic waveguides with complex cross-sections. We employ a recently developed hybrid SAFE-3D FE method to study the scattering of guided waves at ...Read more
Author:Lightfoot, N; Maccelari, MDate:Mar 1999This report covers the production of a general reference handbook of numerical
modelling for the South African mining industry, with particular reference to the gold and platinum industries. It also covers a research sub-project investigating ...Read more
Author:Lightfoot, N; Maccelari, MDate:Sep 1999The SIMRAC project GAP629 has two aspects. Firstly, the production of an updated edition of the guidebook Numerical Modelling of Mine Workings. The original document was launched to the South African mining industry in April 1999. Secondly, ...Read more
Author:De wet Strydom, JPDate:Aug 2000The main objective of this thesis was the development and testing of a concept that can potentially be implemented on a rock drill to attenuate the operating frequency of a rock drill. The concept must be able to account for minor changes in ...Read more
Author:Greben, JM; Cooper, Antony K; Gledhill, Irvy MA; de Villiers, RDate:Nov 2008The authors have applied various numerical techniques to describe the stability of breakwater structures under the exposure of waves. These studies are intended to get a better understanding of the parameters playing a role in breakwater ...Read more
Author:Wilke, DN; Kok, SDate:Jul 2012This study considers the numerical sensitivity calculation for discontinuous gradientonly optimization problems using the complex-step method. The complex-step method was initially introduced to differentiate analytical functions in the late ...Read more
Author:Klein, Peter; Roos, T; Sheer, JDate:Sep 2010The implementation of thermal storage systems allows concentrating solar power plants to generate predictable power delivery to the grid by mitigating the variability of solar energy supply. However, while thermal storage solutions exist for ...Read more
Author:Napier, JAL; Malan, DFDate:Sep 2008Some of the key problems facing rock engineers on mines in the Bushveld Complex are design of stable panel spans, optimum pillar dimensions and assessing hangingwall stability. A particularly difficult problem is encountered in some mines ...Read more
Author:Mbanjwa, MBDate:Oct 2012Droplet-based microfluidic technology has, in recent years, found numerous applications in biology, chemistry, materials synthesis and process engineering applications. Alongside experimental work, numerical tools, such as computational fluid ...Read more
Author:Jansen van Rensburg, Gerhardus J; Bogaers, Alfred EJDate:Oct 2018During the optimal design and simulation of machining or forming processes, detailed simulation of structural response is typically required for use in Finite Element Analysis (FEA). In this study, the bulk temperature and rate dependent ...Read more
Author:Dias, B; Wolmarans, P; Laubscher, JA; Schutte, PCDate:Dec 2003Housing and nutrition have been used as indicators of poverty, and as common targets for intervention to improve public health and reduce health inequalities (Gauldie 1974). The relationship between health, nutrition and housing is well ...Read more