Author:Marais, ELDate:2006At the end of 2005 it was decided that a number of measurements performed in the dc Low Frequency (dclf) Laboratory of the CSIR National Metrology Laboratory (CSIR NML) could benefit from automation. The measurements identified were typically ...Read more
Author:Teleka, Ruth; Green, JJ; Brink, SDate:Jul 2011In South African hard-rock mines, best practice dictates that the hanging-walls be inspected after blasting. This process is known as ‘making safe’ and although intended to save lives, it is laborious and subjective. Pressure is placed on the ...Read more
Author:Heyes, AMDate:Jun 1998The failure of vehicle components is an area which is likely to affect all of us at one stage or another. In this paper the distribution of component failures is discussed, as well as the causes thereof. Four case studies are presented to ...Read more
Author:Berman, R; Benade, R; Rosman, Benjamin SDate:Nov 2015In most countries throughout the world, heavy vehicle use on public roads are governed by prescriptive rules, typically by imposing stringent mass and dimension limits in an attempt to control vehicle safety. A recent alternative framework ...Read more
Author:Olwal, TO; Van Wyk, BJ; Djouani, K; Hamam, Y; Siarry, P; Ntlatlapa, Ntsibane SDate:Sep 2008Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. Previous studies have emphasized throughput maximization in such systems as the main design challenge and transmission power control treated as a secondary ...Read more
Author:Olwal, TO; Van Wyk, BJ; Djouani, K; Hamam, Y; Siarry, P; Ntlatlapa, Ntsibane SDate:Sep 2009Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. Previous studies have emphasized through- put maximization in such systems as the main design challenge and transmission power control treated as a secondary ...Read more
Author:Holtzhausen S; Matsebe O; Tlale NSDate:Nov 2008Autonomous under water vehicles are ideal platforms for search and rescue operations. They can also be used for inspection of underwater terrains. These vehicles need to be autonomous and robust to cope with unpredictable current and high ...Read more
Author:Holtzhausen, S; Matsebe, O; Tlale, NS; Bright, GDate:Nov 2008AUVs are ideal platforms for search and rescue operations. They can also be used for inspection of underwater terrains. These vehicles need to be autonomous and robust to cope with unpredictable current and high pressures. In this paper it ...Read more
Author:Holtzhausen, S; Matsebe, O; Tlale, NSDate:2008AUVs are ideal platforms for search and rescue operations. They can also be used for inspection of underwater terrains. These vehicles need to be autonomous and robust to cope with unpredictable current and high pressures. In this paper it ...Read more
Author:Edwards, ADate:Sep 2012This presentation outlines the importance of awareness training of managers at all levels and miners regarding the importance of hearing protection devices and adequate knowledge, motivation and training to prevent hearing loss.Read more
Author:Maina, JW; Ozawa, Y; Matsui, KDate:Jun 2009The importance of accounting for material nonlinearity and anisotropic behaviour in order to improve the resilient models for pavement materials and numerical analysis is presented in this paper. Effects of material inhomogeneity on the ...Read more
Author:Long, Craig S; Loveday, Philip W; Groenwold, AADate:Jan 2009Two new solid-of-revolution axisymmetric finite elements, which account for hoop fibre rotations, are introduced. The first is based on an irreducible formulation, with only displacement and rotation fields assumed independently. The second ...Read more
Author:Dudley, Angela L; Litvin, I; Roux, FS; Forbes, ADate:Jul 2012This presentation analyses the azimuthal decomposition of optical modes. Decomposition of azimuthal modes need two steps, namely generation and decomposition. An azimuthally-varying phase (bounded by a ring-slit) placed in the spatial frequency ...Read more
Author:Litvin, IA; Dudley, Angela L; Roux, FS; Forbes, ADate:May 2012We demonstrate a simple approach, using digital holograms, to perform a complete azimuthal decomposition of an optical field. Importantly, we use a set of basis functions that are not scale dependent so that unlike other methods, no knowledge ...Read more
Author:Zhang, Y; Roux, FS; McLaren, M; Forbes, ADate:Aug 2014Considering the quantum state produced in type I spontaneous parametric down-conversion with collinear, degenerate signal and idler beams, and a Gaussian pump, we show that the azimuthal Schmidt number in the Laguerre-Gaussian (LG) basis ...Read more
Author:Stewart, R; Donovan, SJ; Haarhoff, J; Brink, V; Vogt, DDate:Nov 2008Labour-intensive drill-and-blast mining, as conducted on the major South African gold and platinum mines, is often not tightly managed due to the lack of good information about what is going on underground. As a result, mining operations tend ...Read more
Author:Stewart, R; Donovan, SJ; Haarhoff, J; Vogt, DRDate:Aug 2008AziSA is an architecture for measurement and control networks that can be used to collect, store and facilitate the analysis of data from challenging underground environments. AziSA defines four node classes, two (Classes Four and Three) for ...Read more
Author:Vogt, D; Brink, AVZ; Stewart, R; Donovan, SJ; Haarhoff, JDate:Oct 2008South African underground hard rock mines are typically managed using measurements made daily, weekly or even monthly of key parameters face advance, readiness to blast, blast success, temperature or dust levels. Health, safety and productivity ...Read more