Author:Kusangaya, S; Warburton, ML; Archer, Emma RM; Jewitt, GPWDate:Oct 2013The Intergovernmental Panel on Climate Change concluded that there is consensus that the increase of atmospheric greenhouse gases will result in climate change which will cause the sea level to rise, increased frequency of extreme climatic ...Read more
Author:Tozuka, T; Abiodun, BJ; Engelbrecht, FADate:Mar 2013This study examines southern African summer rainfall and tropical temperate troughs (TTTs) simulated with three versions of an atmospheric general circulation model differing only in the convection scheme. All three versions provide realistic ...Read more
Author:Le Maitre, David C; Gush, Mark B; Dzikiti, SebinasiDate:May 2015There have been many studies of the diverse impacts of invasions by alien plants but few have assessed impacts on water resources. We reviewed the information on the impacts of invasions on surface runoff and groundwater resources at stand ...Read more
Author:Chamier, J; Schachtschneider, K; Le Maitre, David C; Ashton, PJ; Van Wilgen, BWDate:Apr 2012We review the current state of knowledge of quantified impacts of invasive alien plants on water quality, with a focus on South Africa. In South Africa, over 200 introduced plant species are regarded as invasive. Many of these species are ...Read more
Author:Kgaphola, Motsoko J; Ramoelo, A; Odindi, J; Mwenge Kahinda, Jean-Marc; Seetal, Ashwin RDate:Oct 2021Interaction between biophysical variables and socioeconomic conditions are far more complex and affect land cover and quality. These are aggravated by global climate change and climate variability in semi-arid regions. Therefore, the study ...Read more
Author:Arabi, Sumaiya; Nahman, AntonDate:May 2020In addition to its direct impacts on marine ecology and biota, marine plastic debris can affect the delivery of ecosystem services, with resulting impacts on human well-being, society and the economy. It is important to quantify these impacts ...Read more
Author:Truter, JC; Van Wyk, JH; Oberholster, Paul J; Botha, AMDate:Feb 2014Acid mine drainage (AMD) is a global environmental concern due to detrimental impacts on river ecosystems. Little is however known regarding the biological impacts of neutralized AMD on aquatic vertebrates despite excessive discharge into ...Read more
Author:Funke, Nicola S; Huitema, D; Petersen, ADate:Jun 2022This article contributes to the literature on environmental policy controversies. We utilize an Argumentative Discourse Analysis (ADA)-based approachto analyze the struggle for discursive hegemony that took place between competing story-lines ...Read more
Author:Musvoto, Constansia D; Nortje, Karen; De Wet, Benita; Mahumani, BK; Nahman, AntonDate:Jan 2015Globally, there are social, economic and environmental challenges related to sustainable development; these challenges include climate change, the need to feed a rapidly increasing population, high rates of poverty and environmental degradation. ...Read more
Author:Van de Steen, B; Vervoort, A; Napier, JAL; Durrheim, RJDate:Apr 2003This paper investigates whether a micromechanical model developed to investigate the relation between the basic failure processes at grain-scale and the macroscopic failure pattern can be applied to model the fracturing around large-scale ...Read more
Author:Dedekind, MODate:1994Turbine blades which are designed with airfoil cooling are subject to thermo-mechanical fatigue as well as creep damage. These problems arise due to thermal cycling and high operating temperatures in service. An implementation of fatigue and ...Read more
Author:Pienaar, Harrison H; Xu, Y; Braune, E; Cao, J; Dzikiti, Sebinasi; Jovanovic, NZDate:Aug 2021This review paper on groundwater protection measures in South Africa focuses on the actual implementation of groundwater protection measures, in particular, the resource-directed measures (RDM) as described in Chapter 3 of the National Water ...Read more
Author:Litvin, IADate:Feb 2012In this work the author proposes an implementation of a new intra-cavity beam shaping technique to vary the intensity distribution of the fundamental mode in a resonator cavity while maintaining a constant intensity distribution at the output. ...Read more
Author:Van Zyl, TL; Ehlers, EM; Marais, EDate:2010The paper reports on the original concept of introducing Resource-Negotiating (RN) agents into telemanufacturing. Human users submit a design file that they want manufactured. The machine that will be selected to manufacture the design file ...Read more
Author:Choudhary, SK; Konrad, T; Uys, HDate:Jan 2013Unsharp positive operator-valued measurements allow a variety of measurement applications which minimally disrupt the state of the quantum system. Experimental schemes are proposed for implementing unsharp measurements on the qubit levels of ...Read more
Author:Dudley, Angela L; Majola, N; Chetty, N; Forbes, ADate:Feb 2016The coherent superposition of a Gaussian beam with an optical vortex can be mathematically described to occupy the complex plane. The authors provide a simple analogy between the mathematics, in the form of the complex plane, and the visual ...Read more
Author:Mwenge Kahinda, Jean-Marc; Meissner, Richard; Engelbrecht, FADate:Oct 2015A three-phase study was initiated as a way to promote Integrated Catchment Management approaches in the Limpopo River basin. This paper presents the situational assessment, which should enable De Beers to understand how their Venetia Mine ...Read more