Author:Chetty, Brenton L; Isaac, Sherrin J; Walingo, TDate:Sep 2023There are many challenges associated with developing a feasible wireless communication system for the harsh underground mining environment. Radio signals suffer from strong attenuations due to the excessive reflections, diffractions, scatterings, ...Read more
Author:Dunn, Dwain I; Snedden, Glen C; Von Backström, TWDate:Jan 2010Turbine manufacturers are striving to develop turbines that are more efficient. One area of focus has been the control of secondary flows through the use of non-axisymmetric endwalls. The majority of development has been performed in cascades ...Read more
Author:Napier, JAL; Drescher, K; Hildyard, MW; Kataka, MO; Malan, DF; Sellers, EJDate:Mar 2002The main themes of the project GAP601b have been experimental investigations of creep effects, further underground observations of time-dependent behaviour, investigation of scale effects and rock mass stability and studies of the interaction ...Read more
Author:Nzengue, AGB; Mpofu, K; Mathe, Ntombizodwa R; Daniyan, I; Muvunzi, RaDate:Jul 2023The chase for sustainable manufacturing that contributes to addressing climate change is of research interest across scientists and industrial sectors. The lightweight and high strength properties of aluminium alloys foster sustainable cost, ...Read more
Author:Elkoussy, A; Youssef, AF; Pityana, Sisa L; Taha, MADate:2019Coating steel surfaces with hard ceramic particles in Aluminum has a great influence to improve mechanical properties and wear resistance. This research investigated direct laser deposition, where no binder is used, of pure Aluminum and its ...Read more
Author:Mbanjwa, MB; Land, KJ; Jewell, L; Moss, EA; Gledhill, Irvy MADate:Jan 2010This paper discusses the experimental observation of capillary instabilities of two-phase flow in a microfluidc T-junction. These instabilities are analogous to the classical Plateau-Rayleigh instabilities. The experiments were carried out ...Read more
Author:Karsten, A; Singh, A; Almonem, SADate:Sep 2010Raytracing computer models are valuable tools to determine the fluence at a specific depth into issue, but need to be verified before they can be used with confidence. Such a model for skin showed good agreement (within 10%) when compared ...Read more
Author:Maliwatu, R; Lysko, Albert A; Johnson, DLDate:Nov 2018The paper considers usage of an existing TV broadcasting transmitter for analyzing propagation and tuning existing propagation models to local conditions for improved accuracy. A comparison of measured signal strength values with the values ...Read more
Author:Roux, A; Nurick, GNDate:Sep 2009The Council for Scientific and Industrial Research (CSIR) conducts research into the effect of underwater explosions on maritime structures and equipment. One of the parameters that are required to be measured to a large degree of accuracy ...Read more
Author:Meyers, BC; Snedden, Glen C; Meyers, Bronwyn C; Roos, TH; Mahmood, GIDate:Sep 2011A three-component flow field inside a can-type, forward flow experimental combustor was measured under non-reacting conditions. The combustor was run at atmospheric conditions with the air flow supplied from a fan and the outlet was straight ...Read more
Author:Du Plessis, WP; Odendaal, JW; Joubert, JDate:Jan 2010Experimental measurements that accurately simulate the effect of a retrodirective cross-eye jammer on a monopulse radar are described. The accuracy of a recently published extended analysis of retrodirective crosseye jamming and the limitations ...Read more
Author:Patanaik, A; Jacobs, V; Anandjiwala, RDDate:Nov 2008In this paper the authors report theoretical modeling of the electrospinning process which is substantiated by experimental study for comparison. Different types of polyethylene oxide nanofibres are spun in the presence and absence of poly ...Read more
Author:Grobler, Carla; Sharifpur, M; Ghodsinezhad, H; Capitani, R; Meyer, JPDate:Jul 2015Natural convection is convection where the fluid motion is driven by buoyancy forces. Porous media and nanofluids have an impact on the heat transfer capabilities of thermal systems. The present experimental study is part of ongoing research ...Read more
Author:Malan, DF; Grave, M; Napier, JAL; Piper, PS; Lawrence, LEDate:Mar 2003Previous fundamental research projects have indicated the value of continuous closure measurements for improved support design and hazard assessment and for quantifying the effect of seismicity on stope closure. This project examined the ...Read more
Author:Malan, DF; Grave, M; Napier, JAL; Piper, PS; Lawrence, LEDate:Mar 2003Previous fundamental research projects have indicated the value of continuous closure measurements for improved support design and hazard assessment and for quantifying the effect of seismicity on stope closure. This project examined the ...Read more
Author:Dube, CDate:Sep 2013Mobile manipulators are highly susceptible to tip over due to the motion of the manipulator or the gradient of the slope being traversed by the robot’s mobile base. This paper presents the experimental validation of the tip over stability ...Read more
Author:Karsten, AE; Singh, A; Braun, MWDate:Apr 2011Laser light is frequently used in both diagnostics and treatment of patients. For any laser treatment to be effective it is important to deliver the correct dose at the treatment site. Human skin scatters and absorbs laser light in the visible ...Read more
Author:Vogt, D; Nyareli, TDate:Jun 2008It is difficult to achieve significant directivity in the radial direction of a borehole radar antenna, because the spacing of antenna elements is typically constrained by the borehole diameter to be considerably less than a wavelength. ...Read more
Author:Malinga, Andries LDate:Nov 2017The evolution of the Next Generation Network Technologies such as the Fourth Generation (4G) and Fifth Generation (5G), have made them an adoption option in Command and Control (C2) tactical deployments for wireless communication network ...Read more
Author:Erasmus, TCDate:1962The raw coal brought to the plant was reduced to minus three inches. The minus coal was passed over screens to eliminate minus 1/4 inch fines and -3 inch +1/4 inch coal was stored in service bunkers in the pilot plant building.Read more