Author:Oelofse, Suzanna HH; Muswema, Aubrey PDate:Sep 2013Globally there are sufficient land and water resources to produce food over the next 50 years, but only if water for agriculture is better managed (Molden, 2007). Water is a critical and strategic natural resource in South Africa. It is ...Read more
Author:Ibraimo, NA; Taylor, NJ; Steyn, JM; Gush, Mark B; Annandale, JGDate:Nov 2016Mature pecans use large quantities of water and therefore the accurate estimation of water use or evapotranspiration (ET) of pecan orchards is critical for judicious irrigation water management and planning. Measuring ET under all possible ...Read more
Author:Bidgood, Peter MDate:Jan 2017The estimation of balance uncertainty using conventional statistical and error propagation methods has been found to be both approximate and laborious to the point of being untenable. Direct Simulation by Monte Carlo (DSMC) has been shown to ...Read more
Author:Adjorlolo, C; Mutanga, O; Cho, Moses ADate:May 2014This paper assesses the potential of multispectral data attained using WorldView-2 (WV2) satellite to estimate and map the variability in canopy nitrogen (N) concentration across C3 and C4 grasslands. The WV2 satellite image was acquired for ...Read more
Author:Sun, Z; Gebremichael, M; Ardö, J; Nickless, A; Caque, B; Merboldh, L; Kutschi, WDate:Aug 2012Most existing remote sensing-based evapotranspiration (ET) algorithms rely exclusively on polar-orbiting satellites with thermal infrared sensors, and therefore the resulting ET values represent only “instantaneous or snapshot” values. However, ...Read more
Author:Moodley, FB; Thambiran, TirushaDate:Oct 2015International shipping is recognised as an important sector of the global economy with over 80% of trading goods being transported by ships. Emissions from Ocean-Going Vessels (OGVs) which are generally powered by diesel fuel are thus ...Read more
Author:Kruger, AC; Goliger, Adam M; Retief, JV; Sekele, SSDate:Aug 2010The South African Weather Service, with the support of the Council for Scientific and Industrial Research (CSIR) and the University of Stellenbosch, is in the process of updating the extreme surface wind statistics for South Africa. A previous ...Read more
Author:Symes, CT; Woodborne, SDate:Apr 2011The diet of the harvester termite Hodotermes mossambicus was investigated at two sites with distinct dietary components: C4 grasses (d13C isotope values, -13.8‰ to -14.0‰) and C3 plants (d13C isotope values, -25.6‰ to -27.1‰). By comparing ...Read more
Author:Nickless, A; Archibald, SA; Van der Merwe, Martina R; Scholes, RJ; Williams, CA; Hanan, NDate:Mar 2011Annual estimates of gross primary production (GPP) and ecosystem respiration (Reco) were obtained for the Skukuza flux site, Kruger Park, South Africa, based on the eddy covariance flux data. A new method of extrapolating night-time respiration ...Read more
Author:Setshedi, Isaac I; Loveday, Philip W; Long, Craig S; Wilke, Daniel NDate:Jul 2019Guided wave based monitoring systems require accurate knowledge of mode propagation characteristics such as wavenumber and group velocity dispersion curves. These characteristics may be computed numerically for a rail provided that the material ...Read more
Author:Erasmus, TC; Du Plessis, HSLDate:1963The objective of the report was to ascertain the order of the residence time distribution within the Drewboy washer.Read more
Author:Smit, Jacoba E; Hanekom, T; Hanekom, JJDate:Mar 2009Neural excitation profile widths at the neural level, for monopolar stimulation with Nucleus straight and contour arrays respectively, were simulated using a combined volume-conduction-neural model. The electrically evoked compound action ...Read more
Author:Mema, V; Hlabela, Simon P; Marx, SDate:Jun 2015Energy recovered from biogas in the form of methane can reduce the usage of electricity generated from fossil fuels thereby lessening greenhouse gas deposits into environment. Sewage sludge produced by Municipal Wastewater Treatment Works ...Read more
Author:Hohls, D; Du Plessis, G; Venter, SN; Steynberg, MC; De Wet, CME; Rodda, N; Kfir, RDate:1995The aim of this study was to evaluate the validity of assumptions, regarding assimilative capacity for microbial contaminants, implicit in microbial water quality management in South Africa. A one dimensional steady state stream water quality ...Read more
Author:Nota, N; Musee, N; Aldrich, CDate:01 Sep 2010Nanotechnology-based applications have dramatically increased in commercial and industrial applications1-3 (see Figures 1, 2 and 3). Also, the growth of nanotechnology-based consumer products (nanoproducts) in the global market is expected ...Read more
Author:De Saxe, Christopher C; Cebon, DDate:Jun 2018High-capacity vehicles have been shown to be highly effective in reducing emissions associated with road freight transport. However, the reduced manoeuvrability of long vehicles often necessitates the use of active trailer steering. Path-following ...Read more
Author:Umuhoza, D; Agbinya, JI; Omlin, CWDate:Aug 2007Estimation of trust in ad-hoc networks is an inevitable basis for hybrid networks to inter-operate. The contributions in this paper provide a framework for estimating the trust between nodes in an ad hoc network based on quality of service ...Read more
Author:Ellero, M; Naidoo, Sasha; Gebreslasie, MDate:Dec 2016Urban Heat Islands (UHI’s) are an increasingly common phenomenon within urban areas around the world. These heat islands may lead to a variety of negative effects, such as health impacts on urban inhabitants and disruption of the functioning ...Read more
Author:Ellero, M; Naidoo, Sasha; Gebreslasie, MDate:Dec 2016Urban Heat Islands (UHI’s) are an increasingly common phenomenon within urban areas around the world. These heat islands may lead to a variety of negative effects, such as health impacts on urban inhabitants and disruption of the functioning ...Read more