Author:Woodborne, SDate:Apr 1999This paper discusses an overview of research which was conducted for more than 25 years on dating and isotopes by the Quaternary Dating Research Unit (QUADRU) under the supervision of Dr John. Vogel in Pretoria (South Africa).Read more
Author:Holtman, BDate:Nov 2007Violent times do not call for violent measures but for pragmatic ones South Africans are in need of more compassion not hate.Read more
Author:Wessels, Konrad JDate:Mar 2009There is an urgent need for a quantitative, repeatable measure of land degradation and remote sensing provides the only viable option at a regional to global scale. It is therefore commendable that Bai et al. (2008) attempted to use remote ...Read more
Author:Wen, L; Liang, J; Liu, C-M; Chen, J; Luo, HongzeDate:Nov 2016Spinel Li(sub4)Ti(sub5)O(sub12) has been considered as a promising anode material to substitute graphite in lithium ion batteries (LIBs) for large scale electrical energy storage due to its high safety and long cycling stability. However, the ...Read more
Author:Prasanth, PV; Sivakumar, V; Sridharan, S; Kumar, YB; Bencherif, H; Rao, DNDate:Oct 2009In this paper, researchers present seasonal and nocturnal variations of mesospheric sodium (Na) layer parameters observed over Gadanki (13.5° N, 79.2° E), based on 166 nights during the period from January 2005 to December 2006, for the first ...Read more
Author:Venkataraman, SDate:2008Two laser-radar systems in South Africa offer great potential to characterize the region's atmospheric particulate matter and pollutants. Lasers offer great advantages over conventional light sources in terms of peak power and narrow spectral ...Read more
Author:Mashoko, L; Mbohwa, C; Thomas, VMDate:Jan 2013The South African sugar industry has a potential for cogeneration of steam and electricity using bagasse. The sugar industry has the potential to generate about 960 MW per year from bagasse based on the average of 20 million tons of sugar ...Read more
Author:Vogel, JC; Fuls, ADate:Jan 2005Radiocarbon analyses on 16 specimens of the Leadwood tree, Combretum imberbe, showed that they live for several hundred years. The oldest specimen was more than 1000 years old when it died and had an extremely slow radial growth rate of 0.33 ...Read more
Author:Goga, T; Harding, K; Russo, Valentina; Von Blottnitz, HDate:Jan 2023Increased production rates of plastic and limited disposal methods have fed concerns regarding environmental degradation. Whilst most of the focus is on plastic litter and marine pollution, greenhouse gas emissions of plastic over its value ...Read more
Author:Marondedze, EF; Govender, Krishna K; Govender, PPDate:Dec 2020Currently, only three molecules, flutemetamol, florbetaben and florbetapir, have been approved for clinical use towards the definitive diagnosis of Alzheimer’s disease (AD). Despite the clinically approved drugs’ advantages, there still exists ...Read more
Author:Forbes, A; Masina, Bathusile NDate:Nov 2010In this article the authors outline how an all-optical system may be designed for the heating, and then subsequent temperature measurement, of any sample, thus allowing a non-contact approach to thermal studies of materialsRead more
Author:De Beer, Morris; Mathews, EH; Krueger, D; Maree, J; Mbhele, FN; Phalanndwa, M; Novhe, NODate:Mar 2008Traditionally acid mine water is neutralised with lime. Limestone is a cheaper alternative for such applications. A case study showed that limestone can be used effectively to replace lime for the neutralization of arsenic rich acid water. ...Read more
Author:Wessels, Konrad J; Van den Bergh, F; Scholes, RJDate:Oct 2012This paper demonstrates a simulation approach for testing the sensitivity of linear and non-parametric trend analysis methods applied to remotely sensed vegetation index data for the detection of land degradation. The intensity, rate and ...Read more
Author:Ashton, PJ; Schoeman, FRDate:1983The Pretoria Salt pan is shallow and alkaline with pronounced mesothermy at a depth of between 0.55 and 0.7 metres. Secchi disc transparencies ranged from 7 to 19 cm. Endorheic or closed drainage basins are widely distributed in many climate ...Read more
Author:Roux, FSDate:Jun 2014The quantum state for the spatial degrees of freedom of photons propagating through turbulence is analyzed. The turbulent medium is modeled by a single phase screen for weak scintillation conditions and by multiple phase screens for general ...Read more
Author:Maina, JW; Ozawa, Y; Matsui, KDate:Oct 2012Conventional methods for road and airport pavement analyses, such as BISAR and GAMES, were developed based on a cylindrical coordinate system. Because of the loading symmetry due to the assumption that a circular uniformly distributed load ...Read more
Author:Phasha, MJ; Ngoepe, PE; Chauke, HR; Pettifor, DR; Nguyen-Mann, DDate:Jun 2010The first principles pseudopotential calculations based on the PerdeweBurkeeErnzerhof (PBE) form of generalized gradient approximation (GGA) within density functional theory (DFT) have been utilized to investigate the structural and elastic ...Read more
Author:Oberholster, Paul J; Botha, A-M; Myburgh, JGDate:Nov 2009The paper highlights results that show a potential shift in certain phytoplankton communities against a background of eutrophication, the authors predict an increase in blooms of cyanophytes and poisoning incidences by previously non dominant ...Read more