Author:Mathoho, I; Akinlabi, ET; Arthur, Nana KK; Tlotleng, MonnammeDate:Aug 2020This study investigated the influence direct energy deposition (DED) process parameters have on the metallurgical characteristics (porosity, microstructural evolution, microhardness, and corrosion behavior) of 17−4 PH stainless steel powder. ...Read more
Author:Arnold, Kathryn A; Le Roux, Alize; Hattingh, MDate:Aug 2017The core objective of this study was to analyse the impact of three Gautrain stations on real estate in the City of Johannesburg, looking specifically at how the Sandton, Rosebank and Midrand stations affected property prices and sales activity ...Read more
Author:Ramjee, G; Williams, B; Gouws, E; Van Dyck, E; De Deken, B; Karim, SADate:01 Jul 2005This study investigated the impact of prevalent and incident HSV-2 infection on the incidence of HIV-1 infection in a cohort of female commercial sex workers in KwaZulu-Natal, South Africa. Prior to a vaginal microbicide trial, 416 women were ...Read more
Author:Le Maitre, David C; Versfeld, DB; Chapman, RADate:Jul 2000The impacts of the widespread invasions by alien plants in South Africa are increasingly recognised. Most of the past concern has been about the impacts on conservation areas, other areas of natural vegetation and on agricultural productivity. ...Read more
Author:Preston, IR; Le Maitre, David C; Blignaut, JN; Louw, L; Palmer, CGDate:Oct 2018We analyse the impact of failing to control invasive alien plants (IAPs) on the water supply to the Berg River and De Hoop Dams, in other words, the opportunity cost of not clearing IAPs in these two catchments. To do this we used models to ...Read more
Author:Mathole, K; Ndarana, T; Beraki, Asmerom F; Landman, WADate:2014We conducted a comparison of trends in lower stratospheric temperatures and summer zonal wind fields based on 27 years of reanalysis data and output from hindcast simulations using a coupled ocean atmospheric general circulation model (OAGCM). ...Read more
Author:Brent, AC; Hietkamp, SDate:Sep 2006In a letter to the editor, the authors comment on BA Steen's article on "Abiotic Resource Depletion: different perceptions of the problem with mineral deposits" published in the special issue of the International Journal of Life Cycle Assessment, ...Read more
Author:Osifeko, MO; Hancke, GP; Abu-Mahfouz, Adnan MIDate:Aug 2022Vehicular Ad Hoc Network (VANET) is a type of network that facilitates communication between vehicles usually on highways or in any environment with vehicular traffic such as a parking space. The dynamic nature of vehicular movements makes ...Read more
Author:Mokgeseng, TA; Malik, Humna H; Pretorius, JHCDate:May 2021The research solely focuses on Municipal leadership. It delves into the technical, analytical and leadership skills required in adopting the technology transfer in the case of Metropolitan Municipalities in Gauteng, South Africa. Five such ...Read more
Author:Bandyopadhyay, J; Ray, SS; Scriba, Manfred R; Malwela, TDate:Jul 2012The impact of nanoclay on the isothermal crystal growth kinetics and morphology of biodegradable poly(ethylene succinate) (PES) is reported. A PES composite (PESNC) containing 5 wt% organically modified montmorillonite, was prepared via solvent ...Read more
Author:Greesh, N; Ray, Suprakas SDate:Jan 2016Polystyrene (PS) colloid particles in presence of non-ionic surfactant-modified clay particles were prepared by the free-radical polymerization of styrene monomers in emulsion. Three different types of non-ionic surfactants, sorbitan monopalmitate ...Read more
Author:Litvin, IA; Forbes, ADate:2007The authors investigate the phase conjugating element of a two element Fourier transform beam shaping scheme and the impact this element has on the resulting propagation. It is shown that there are stricter limitations placed on the system ...Read more
Author:Adedeji, KB; Hamam, Y; Abu-Mahfouz, Adnan MIDate:2019Increasing water demand due to urbanization creates a need to develop schemes for managing water supply networks (WSNs). In recent years, hydraulic modeling of WSNs has been used to assess the state of networks in terms of leakage analysis ...Read more
Author:Schachtschneider, K; February, ECDate:Apr 2013Several Prosopis species have been introduced into South Africa in the last century many of which have become invasive. Here we determine the extent to which increased mortality of Acacia erioloba, a keystone species in the Kalahari, can be ...Read more
Author:Abia, ALK; Ubomba-Jaswa, Eunice; Momba, MNBDate:Dec 2015Many South Africans living in resource-poor settings with little or no access to pipe-borne water still rely on rivers as alternative water sources for drinking and other purposes. The poor microbial quality of such water bodies calls for ...Read more
Author:Ssemakalu, CC; Le Roux, Wouter J; Pillay, MDate:Sep 2013Cholera toxin is the aetiological agent of cholera – a deadly waterborne disease acquired through the consumption of untreated water contaminated with CTX bacteriophage harbouring strains of V. cholerae. Solar disinfection is a re-emerging ...Read more
Author:Dabrowski, J; Baldwin, DS; Dabrowski, James M; Hill, Liesl; Shadung, JustinusDate:Jan 2017South Africa is prone to droughts and is heavily dependent on stored water resources. Few studies in South Africa have investigated the impact of drought on water quality when rainfall resumes and reservoir sediments are rewet. Other research ...Read more