Author:Theyse, HL; De Beer, Morris; Rust, FCDate:1996A historical overview of the South African mechanistic pavement design method, from its development in the early 1970s to the present, is presented. Material characterization, structural analysis, and pavement life prediction are discussed, ...Read more
Author:Smyth, J; Philogene, L; Bindon, J; Brooks, M; Smith, G; Snedden, Glen CDate:Oct 2012Space technologies are becoming increasingly important to economic development in Africa. Despite this, the continent lacks a satellite launch capability and its reliance on foreign launch service providers may be seen as both limiting ...Read more
Author:Kinabo, AB; Mwangam, JB; Lysko, Albert ADate:May 2021The state of the art for real-time factory-floor communications consists ofa variety of protocols and technologies that aid in timely data exchange through thnetwork. The majority of these are of a fieldbus type, running on a wired link like ...Read more
Author:Waldeck, LDate:Aug 2013This presentation provides an overview of Urban Growth Simulation as a risk free means of assessing the future outcome of major policy and investment decisions with some examples of scenarios that were simulated in different South African cities.Read more
Author:Waldeck, LDate:Nov 2013This presentation provides an overview of Urban Growth Simulation as a risk free means of assessing the future outcome of major policy and investment decisions with some examples of scenarios that were simulated in different South African ...Read more
Author:Blouw, SDate:Feb 2007The vision and mission behind this paper, is to develop a globally competitive fibre industry, with cutting edge technologies, expertise and innovative solutions for the fibre industry. Flax is cultivated in wide range of soils. It requires ...Read more
Author:Anele, AO; Hamam, Y; Abu-Mahfouz, Adnan MI; Todini, EDate:Nov 2017The stochastic nature of water consumption patterns during the day and week varies. Therefore, to continually provide water to consumers with appropriate quality, quantity and pressure, water utilities require accurate and appropriate short-term ...Read more
Author:Maphoru, MV; Heveling, J; Kesavan Pillai, SreejaraniDate:Jul 2017Oxidative coupling of naphthols is a useful method for the formation of new carbon-carbon bonds in organic synthesis. In the presence of hydrogen peroxide, platinum supported on activated carbon catalyses this reaction. The outcome is influenced ...Read more
Author:Maphoru, MV; Heveling, J; Kesavan Pillai, SreejaraniDate:Jan 2014Bismuth-promoted platinum catalysts were tested for the oxidative coupling of 2- and 4-substituted 1-naphthols at different temperatures and ambient pressure. The principal final products are the 3,3'-substituted 1,1'-binaphthalenylidene-4,4'-diones ...Read more
Author:Thwala, Melusi; Musee, N; Sikhwivhilu, L; Wepener, VDate:Sep 2013The toxicity effects of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs) on the duckweed Spirodela punctuta were studied to investigate the potential risks posed by these ENPs towards higher aquatic plants. The influence of ...Read more
Author:Thwala, Melusi; Musee, N; Sikhwivhilu, L; Wepener, VDate:Aug 2013The toxicity effects of silver (nAg) and zinc oxide (nZnO) engineered nanoparticles (ENPs) on the duckweed Spirodela punctuta were studied to investigate the potential risks posed by these ENPs towards higher aquatic plants. The influence of ...Read more
Author:Tshilombo, KG; Pistorius, PCDate:2007The authors argue the possibility of using an oxygen probe to follow iron removal during converting, if local equilibrium is established between iron in the matte and the iron oxides in the fayalitic slag. The oxygen activity is expected to ...Read more
Author:Waterhouse, JS; Switsur, VR; Barker, AC; Carter, AHC; Robertson, IDate:30 Jul 2002Annual oxygen and hydrogen isotope ratios in the alpha-cellulose of the latewood of oak (Quercus robur L.) growing on well-drained ground in Norfolk, UK have been measured. The authors have compared the observed values of isotope ratios with ...Read more
Author:Heyes, AMDate:Apr 2001Examination of a failed roof tube from a bagasse boiler showed transverse through-cracks and extensive pitting. The pitting was typically oxygen induced pitting and numerous fatigue cracks had started within these pits. It is highly probable ...Read more
Author:Matseke, Mphoma SDate:Oct 2019The main aim of this work was to synthesize carbon supported CoFe(sub2-x) Ni(subx)o(sub4) nanoparticles with high catalytic activity for ORR in alkaline mediaRead more
Author:Zheng, Haitao; Rohwer, Mark B; Mathe, Mahlanyane KDate:31 Aug 2010Alloyed electrocatalysts such as PtNi/C[1-2], PtCo/C[3], PtCr/C[4], PtFe/C [5-6], and non-alloyed Pt-TiO2/C were reportedly investigated for methanol tolerance during Oxygen reduction reaction (ORR). The high methanol tolerance of these ...Read more
Author:Masa, J; Ozoemena, K; Schuhmann, W; Zagal, JHDate:Aug 2012In this review, we describe and discuss the developments in the use of metalloporphyrins and metallophthalocyanines as catalysts for oxygen reduction in aqueous electrolytes. The main goal of most researchers in this field has been to design ...Read more
Author:Andrew, JE; Johakimu, Jonas K; Ngema, NEDate:Aug 2013Ozone use in conjunction with chlorine dioxide during pulp bleaching offers several advantages over conventional bleaching sequences that make use of chlorine dioxide only. Despite this, in South Africa, only one mill uses ozone. The current ...Read more
Author:Zunckel, M; Emberson, LD; Sowden, MDate:Jun 2006The Cross Border Impact Assessment Project (CAPIA) was designed to develop an understanding of regional surface ozone concentrations and their potential risk to agriculture in southern Africa. Surface ozone concentrations were estimated using ...Read more