Author:Grantham, GH; Thomas, RJ; Eglington, BM; Debruin, D; Atanasov, A; Evans, MJDate:1993Olivine-plagioclase and phlogopite-plagioclase coronas have been identified from olivine melanorites of the mid- to late Proterozoic Equeefa Suite in southern Natal, South Africa. Olivine, in contact with plagioclase, is mantled by a shell ...Read more
Author:Haywood, Lorren K; Brent, AC; Trotter, DH; Wise, RDate:2010In this paper authors consider the increasingly prominent expectations that business can and will significantly contribute to sustainable development. They use the framework of social-ecological systems, and the principles thereof, as a lens ...Read more
Author:Walubita, LF; Mahmoud, E; Fuentes, L; Prakoso, A; Lee, SI; Souliman, M; Komba, Julius JDate:Nov 2020Asphalt-binders are part of the key material constituents affecting the performance of hot-mix asphalt (HMA), and ultimately, the field performance of flexible pavement structures. Quite often, it is desired/useful to predict the HMA permanent ...Read more
Author:Walubita, LF; Ling, M; Fuentes, L; Komba, Julius J; Mabrouk, GMDate:Sep 2022Asphalt binder is one of the key constitutive components of hot-mix asphalt (HMA) that considerably affects its rutting performance. In particular, the high-temperature rheological properties measured from the multiple stress creep and recovery ...Read more
Author:Walubita, LF; Fuentes, L; Prakoso, A; Pianeta, LM; Komba, Julius J; Naik, BDate:Mar 2020Rutting is one of the common distresses occurring in hot-mix asphalt (HMA) pavements that can be mitigated through adequate laboratory testing during the HMA mix-design screening stage. The Hamburg Wheel Tracking Tester (HWTT) is one of the ...Read more
Author:Ndwe, TJ; Barnard, E; Foko, Thato EDate:May 2013Access to information and communication is one of the most important needs in any population group. It is generally challenging for people in the developing world to access information because the tools and the technologies used to access ...Read more
Author:Maliwatu, R; Lysko, Albert A; Johnson, David L; Hadzic, SDate:Dec 2016An investigation into the Received Signal Strength Indicator (RSSI) dependency on receiver antenna height in UHF band is conducted. The results show a high correlation between RSSI and height on channels with high signal strength. There is ...Read more
Author:Motaung, DE; Malgas, GF; Arendse, CJDate:2010The photo-induced charge transfer and optoelectronic efficiency of the solar cells correlated to the morphology and the structure of P3HT:C60 blend was studied by means of photoluminescence and electron spin resonance (ESR). The occurrence ...Read more
Author:Lotter, J; Botes, AL; Van Dyk, MS; Breytenbach, JCDate:Aug 2004Epoxides are often highly hydrophobic substrates and the presence of an organic co-solvent within an aqueous bioreactor is in such cases indicated. The effect of 40 water-miscible and -immiscible organic solvents on epoxide hydrolase activity ...Read more
Author:Maluke, N; Mturi, George AJ; Hesp, SAMDate:Oct 2018In South Africa, over the last two decades, there has been a need to improve on the ductility specification test and to better simulate ageing of the asphalt bitumen in the laboratory for the control of fatigue cracking distress. Focusing on ...Read more
Author:Masete, Mosimanegape S; Mutombo, Kalenda; Mostert, R; Siyasiya, C; Stumpf, WDate:Oct 2016The effect of the microstructure on fatigue crack growth resistance of the Ti-6Al-4V alloy was investigated. Various microstructures were produced by solution treatment above the beta transus temperature followed by cooling at different rates. ...Read more
Author:Horak, E; Maina, JW; Guiamba, D; Hartman, ADate:Jul 2008The Light Falling Weight Deflectometer (LWD) has recently become available in South Africa as a portable, light weight, user friendly version of the well established Falling Weight Deflectometer (FWD). This device uses very similar technology ...Read more
Author:Selatile, Mantsopa K; Ray, Suprakas S; Ojijo, Vincent O; Sadiku, RDate:Jan 2019In this study, the tensile properties of systematically optimised, biodegradable polylactide (PLA) electrospum fibres are investigated in order to illuminate the influences of the factors that affect their mechanical properties such as fibre ...Read more
Author:Gregory, MA; George, RC; Marshall, DJ; Anandraj, A; McClurg, TPDate:2002The accumulation of metal in soft tissues, filtration rate and gill filament morphology are correlated in the southern African rock mussel, Perna perna, during exposure to mercury (24 days) and recovery (24 days). The amount of Hg in soft ...Read more
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