Author:Mabena, Chemist M; Bell, Lebohang T; Roux, FSDate:Feb 2019The solution of the infinitesimal propagation equation for atmospheric propagation of single-photon and entangled quantum states, represented in terms of Laguerre-Gauss modes, which is a discrete orbital angular momentum (OAM) basis, is ...Read more
Author:Konadu, DS; Van der Merwe, J; Potgieter, JH; Potgieter-Vermaak, S; Machio, Christopher NDate:Sep 2010The effect of increasing vanadium carbide (VC) content on the corrosion behaviour of tungsten carbide – 10 wt% cobalt hard metals was investigated in 1 M hydrochloric (HCl), and sulphuric (H2SO4) acids solutions. Increasing VC content makes ...Read more
Author:Mutombo, K; Du Toit, MDate:Dec 2011Aluminium and its alloys are widely used as engineering materials on account of their low density, high strength-to-weight ratios, excellent formability and good corrosion resistance in many environments. Pure aluminium has a density of only ...Read more
Author:Mutombo, K; Du Toit, MDate:Oct 2010The fatigue life of Al6061-T651 for various applied stress amplitudes in the unwelded and welded conditions was significantly lower in 3.5% NaCl simulated sea water solution, compared to that in air. The damage ratio increased with a decrease ...Read more
Author:Machio, Christopher N; Konadu, DS; Potgieter, JH; Potgieter-Vermaak, S; Van der Merwe, JDate:Jan 2013Corrosion is an important surface degradation process in some, if not all, applications of tungsten-carbide-(WC-) cobalt- (Co-) based hardmetals. Applications like tools for machining of metals and for wear resistance in the mining industry ...Read more
Author:Milev, A; Share, P; Durrheim, RJ; Naoi, M; Nakatani, M; Yabe, Y; Ogasawara, HDate:Oct 2013Two underground sites in a deep level gold mine in South Africa were instrumented by the Council for Scientific and Industrial Research (CSIR) with tilt meters and seismic monitors. One of the sites was also instrumented by Japanese-German ...Read more
Author:Du Plessis, L; Rust, FC; Horak, E; Nokes, WA; Holland, TJDate:Oct 2008The University of California, through the UC Pavement Research Centre (UC-PRC) located at Davis and Berkeley, started conducting Accelerated Pavement Testing (APT) research in 1994. This research is conducted for the California Department of ...Read more
Author:Chiloane, Lehlogonolo D; Roro, Kittessa T; Bischof-Niemz, Tobias SDate:Nov 2017South Africa has one of the highest carbon emissions per capita in the world, and this has raised the need to reduce reliance on coal generated power which is carbon intensive. The South African government has focussed on introducing renewable ...Read more
Author:Kemp, Lana; Nordengen, Paul A; Steenkamp, Anton J; Ithana, TDate:Oct 2018This paper presents the results of a newly-developed methodology that quantifies the road wear caused by heavy vehicles on the Namibian paved road network in terms of equivalent standard axles and a monetary value. This was achieved by ...Read more
Author:Labuschagne, F; De Beer, E; Roux, D; Venter, KarienDate:Jul 2017The ‘total cost of road traffic crashes’ metric is an important road safety indicator that serves as the departure point for understanding the extent and magnitude of the road safety problem in a country and the stifling impact it has on ...Read more
Author:Roos, Thomas HDate:Oct 2021The decarbonisation of hard-to-abate sectors globally will require significant volumes of carbon-free hydrogen. An investigation has been performed to determine the cost at which hydrogen can be generated by electrolysis using renewable ...Read more
Author:Van Wilgen, BW; De Lange, Willem JDate:Aug 2011This paper provides a brief review of the environmental and economic costs of invasive alien plants in South Africa as a background to assessments of returns on investment in weed biological control. The understanding of impacts and their ...Read more
Author:Nahman, Anton; De Lange, Willem JDate:Nov 2013In a previous paper (Nahman et al., 2012), the authors estimated the costs of household food waste in South Africa, based on the market value of the wasted food, as well as the costs of disposal to landfill. In this paper, we extend the ...Read more
Author:Nahman, Anton; De Lange, Willem JDate:Sep 2013We estimate the costs of food waste throughout the entire food value chain, from agricultural production through to consumption at the household level, in economic terms. First, food waste at each stage of the value chain was quantified in ...Read more
Author:De Lange, Willem J; Nahman, AntonDate:Jun 2015The economic, social and environmental costs of food waste are being increasingly recognised. Food waste consists of both edible and inedible components. Whilst wastage of edible food is problematic for obvious reasons, there are also costs ...Read more
Author:Nahman, Anton; De Lange, Willem J; Oelofse, Suzanna HH; Godfrey, Linda KDate:Nov 2012Food waste is problematic for a number of reasons, including the loss of a potentially valuable food source or resource for use in other processes (e.g. energy generation or composting), wasted resources and emissions in the food supply chain, ...Read more