Author:Musyoka, Nicholas M; Missengue, R; Kusisakana, M; Petrik, LFDate:Aug 2014Clays obtained from South Africa were used as feedstock materials for the synthesis of zeolites. The conventional alkaline hydrothermal treatment of the starting material (90 °C for 8 h)was preceded by a fusion step (550 °C for 1.5 h) to ...Read more
Author:Missengue, RNM; Losch, P; Musyoka, Nicholas M; Louis, B; Pale, P; Petrik, LFDate:Mar 2018Characteristics of ZSM-5 synthesized from H2SO4-treated coal fly ash and fused coal fly ash extracts are compared in this study. In the synthesis process, fused coal fly ash extract (without an additional silica source) was used in the synthesis ...Read more
Author:Scholes, RJDate:Dec 2003The relationship between grass production and the quantity of trees in mixed tree-grass ecosystems (savannas) is convex for all or most of its range. In other words, the grass production declines more steeply per unit increase in tree quantity ...Read more
Author:Mabaso, Matsilele A; Withey, Daniel J; Twala, BDate:Aug 2019This paper developed and evaluated a method for the detection of spots in microscopy images. Spots are subcellular particles formed as a result of biomarkers tagged to biomolecules in a specimen and observed via fluorescence microscopy as ...Read more
Author:Gololo, KV; Majozi, TDate:Sep 2010Cooling water systems are generally designed with a set of heat exchangers arranged in parallel. This arrangement results in higher cooling water flowrate and low cooling water return temperature thus reducing cooling tower efficiency. Previous ...Read more
Author:Mirumachi, N; Van Wyk, EDate:Mar 2010Theory on environmental governance and water governance emphasises decentralised, devolved forms of interaction between stakeholders. As previously excluded actors are empowered to take part in governance, new forms of cooperation are created. ...Read more
Author:Muswema, Aubrey P; Okem, A; Blottnitz, H; Oelofse, Suzanna HHDate:Oct 2018In post-apartheid South Africa, cooperatives appear to be the government’s SMME model for driving job creation. Unfortunately, the mortality rates of cooperatives in all sectors is very high with a reported 12% survival rate of cooperatives ...Read more
Author:Muswema, Aubrey P; Okem, A; Blottnitz, H; Oelofse, Suzanna HHDate:Oct 2018In post-apartheid South Africa, cooperatives appear to be the government’s SMME model for driving job creation. Unfortunately, the mortality rates of cooperatives in all sectors is very high with a reported 12% survival rate of cooperatives ...Read more
Author:Roux, FSDate:Nov 2013The study of optical vortices in stochastic optical fields involves various quantities, including the vortex density and topological charge density, that are defined in terms of local expectation values of the distributions of optical vortices. ...Read more
Author:Gee, EDate:Jul 1976From a theoretical study of the assumed moisture gradients in a bale of greasy wool. resulting from changes in ambient conditions, estimates of the bias in yield given by core wool base, which is moved from a 40 percent RH environment to a ...Read more
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:Kelly, IWDate:May 1976Good correlation was found between the AATCC Wrinkle Recovery Rating and the mean wrinkle for a series of cotton/polyester blend fabrics.Read more
Author:Hunter, L; Gee, EDate:Apr 1982This paper reports on some findings of a study started at the SAWTRI some five years ago ago, and which was aimed at determining the effect of fibre properties and in particular, air-flow determined fineness and maturity, on the properties ...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