Author:Willemse, MG; Siyasiya, CW; Marais, D; Venter, AM; Arthur, Nana KKDate:Feb 2023Although additive manufacturing is fast gaining traction in the industrial world as a reputable manufacturing technique to complement traditional mechanical machining, it still has problems such as porosity and residual stresses in components ...Read more
Author:Van Wyk, Llewellyn VDate:Aug 2015Significant pressure is being brought to bear on material manufacturers to green the materials and products produced by industry in general – and the construction sector is no exception, for good reason. The construction industry and its ...Read more
Author:Mahamood, RM; Akinlabi, ET; Shukla, M; Pityana, Sisa LDate:Feb 2013The economy of using Laser Metal Deposition (LMD) process in the manufacturing of aerospace parts depends on the right processing parameters. LMD is an additive manufacturing technology capable of producing complex parts directly from the CAD ...Read more
Author:Jansen van Rensburg, Gerhardus J; Kok, S; Wilke, DNDate:Jul 2012Tests were done on the compressive behaviour of different metal matrix composite materials. These extremely hard engineering materials consist of ceramic particles embedded in a metal alloy binder. Due to the high stiffness and brittle nature ...Read more
Author:Ampofo-Anti, NDate:Nov 2010The building life cycle demands both operational and embodied energy. It has been estimated that in conventional buildings, operational energy represents approximately 80-90% of total life cycle energy, while embodied energy accounts for the ...Read more
Author:Van Wyk, Llewellyn VDate:Feb 2009The construction industry is a multi-billion dollar industry, and the production and harvesting of raw materials for building purposes occurs on a world-wide scale. Environmental issues are becoming a major world topic, and the construction ...Read more
Author:Alabi, S; Popoola, API; Popoola, OM; Mathe, Ntombizodwa R; Abdulwahab, MDate:Feb 2023Energy is a requisite factor for technological advancement and the economic development of any society. Currently, global energy demand and supply largel rely on fossil fuels. The use of fossil fuels as a source of energy has caused severe ...Read more
Author:Egambaram, Orielia P; Kesavan Pillai, Sreejarani; Ray, Suprakas SDate:Mar 2020UV radiation is one of the critical environmental stress factors for human skin, which can trigger various problems such as pruritus, burning, erythema, premature skin aging and skin cancer. Hence, UV protection has become an indispensable ...Read more
Author:Egambaram, Orielia P; Kesavan Pillai, Sreejarani; Ray, Suprakas SDate:Mar 2020UV radiation is one of the critical environmental stress factors for human skin, which can trigger various problems such as pruritus, burning, erythema, premature skin aging and skin cancer. Hence, UV protection has become an indispensable ...Read more
Author:Butgereit, LDate:Jul 2007Homework is a necessary evil in the path of learning mathematics at school. Mathematics homework is traditionally seen as difficult and boring. In the case of difficult homework, “math clubs” and “math extra lessons” are often perceived as ...Read more
Author:Butgereit, LDate:Apr 2007It is common cause that the average mathematics mark among high school learners in South Africa has declined. Traditional “math clubs” and “math extra lessons” often do not work because of a number of reasons including 1) it being “uncool” ...Read more
Author:Kruger, Rynhardt P; De Wet, F; Niesler, TDate:May 2023Documents containing mathematical content remain largely inaccessible to blind and visually impaired readers because they are predominantly published as untagged PDF which does not include the semantic data necessary for effective accessibility. ...Read more
Author:Singh, M; Mukoma, Peter; North, Brian C; Majozi, TDate:Dec 2020Fossil fuels have earned a reputation as unsustainable sources of energy, due to the release of carbon emissions that are attributable to global warming. To overcome the extensive release of carbon emissions into the environment, different ...Read more
Author:Botha, LR; Bollig, C; Esser, D; Jacobs, Cobus; Preussler, DDate:Jul 2009A mathematical model was developed that accurately predicts the performance of an optically pumped HBr laser. Relatively high conversion efficiency was achieved. Tm pumped Ho:YLF is a viable source for pumping HBr laser, while HBr can be ...Read more
Author:Gouws, JF; Majozi, TDate:Jul 2008Wastewater minimisation in chemical processes has always been the privilege of continuous rather than batch plants. However, this situation is steadily changing, since batch plants have a tendency to generate much more toxic effluent compared ...Read more
Author:Suliman, Ridhwaan; Oxtoby, Oliver F; Malan, AG; Kok, SDate:Jan 2015A fully-coupled partitioned finite volume–finite volume and hybrid finite volume–finite element fluid-structure interaction scheme is presented. The fluid domain is modelled as a viscous incompressible isothermal region governed by the ...Read more
Author:Oxtoby, Oliver F; Malan, AGDate:May 2012In this paper we detail a fast, fully-coupled, partitioned fluid–structure interaction (FSI) scheme. For the incompressible fluid, new fractional-step algorithms are proposed which make possible the fully implicit, but matrixfree, parallel ...Read more
Author:Van Wyk, Llewellyn VDate:Aug 2010The building envelope plays a significant role in the performance of a building, especially with regard to the green building components. This chapter will focus on the external building envelope only, i.e., sub-structure, super structure, ...Read more
Author:Jourdan, PDate:Oct 2017This presentation discusses the modernisation of mining. Maximising the developmental impacts of South Africa's mineral endowment.Read more
Author:Conradie, Dirk CUDate:Aug 2010South Africa is blessed with some of the best quality solar radiation in the world. In the light of this many exciting opportunities exist to utilize the sun to its full potential in the design of energy efficient buildings. Passive solar ...Read more