Author:North, Brian C; Engelbrecht, AD; Oboirien, BDate:Jul 2015A techno-economic assessment was undertaken in two phases. The first is essentially a material and energy balance, in which fuel and sorbent requirements are calculated using input data such as plant size, plant efficiency, fuel CV, Ca/S ...Read more
Author:Mdakane, Lizwe W; Kleynhans, WDate:Oct 2020Oil spills are often caused by vessels when dumping oily bilge wastewater at sea (also referred to as bilge dumping). In an synthetic aperture radar (SAR) image, oil spills dampen the radar energy return and appear as linearly shaped dark ...Read more
Author:Amigun, B; Petrie, D; Gorgens, JDate:Sep 2013The production of fuel grade ethanol from nonfood grade crops in South Africa has the potential to reduce reliance on imported oil and minimize the negative environmental consequences of fossil fuels. This article presents a preliminary ...Read more
Author:Roberts, DE; Du Plessis, A; Botha, LRDate:2009The average ablation depth per pulse of silver foil by 130 fs laser pulses has been measured in vacuum over a range of three orders of magnitude of pulse fluence up to 900 J cm_2. In addition, double pulses with separations up to 3.4 ns have ...Read more
Author:Roberts, DE; Du Plessis, A; Botha, LRDate:2009The average ablation depth per pulse of silver foil by 130 fs laser pulses has been measured in vacuum over a range of three orders of magnitude of pulse fluence up to 900 J cm-2. In addition, double pulses with separations up to 3.4 ns have ...Read more
Author:Mnkeni, PNS; Austin, LMDate:Jan 2009Ecological sanitation is a system that, unlike the traditional waterborne sewerage and pit toilet systems, regards human excreta as a resource to be recycled rather than as a waste. There is, however, little or no information on the fertiliser ...Read more
Author:Rashamuse, K; Sanyika, W; Ronneburg, T; Brady, DDate:Jan 2012A feruloyl esterase encoding gene (designated fae6), derived from a leachate metagenomic library, was cloned and the nucleotide sequence of the insert DNA determined. Translational analysis revealed that fae6 consists of a 515 amino acid ...Read more
Author:Nel, M; Theron, BertusDate:Jun 2010This article discusses the determination of uncertainty contributions when performing a power responsivity calibration for a fibre optic power meter.Read more
Author:Fon, RC; Ndjiongue, AR; Ouahada, K; Abu-Mahfouz, Adnan MIDate:Jun 2023The exponential increase in the demand for a fast and reliable wireless mobile network motivates the need for researchers to engage more actively in visible light communication (VLC) technology. This increase happens in parallel with the ...Read more
Author:Everson, CS; Mengistu, MG; Gush, Mark BDate:Dec 2012Global attention on biofuels and the potential for Jatropha curcas to produce biodiesel from marginal land with low inputs has recently created world-wide interest in this species. This paper reports on the water dynamics and productivity of ...Read more
Author:Kesavan Pillai, Sreejarani; Motshekga, SC; Ray, SS; Kennedy, JDate:2012SnO2/CNT composites were prepared by microwave assisted wet impregnation at 60 °C. The process was optimized by varying the microwave power and reaction time. Raman analysis showed the typical features of the rutile phase of as-synthesized ...Read more
Author:Debba, Pravesh; Stein, A; Van der Meer, FD; Carranza, EJM; Lucieer, ADate:Jun 2008This paper presents a statistical method for deriving the optimal prospective field sampling scheme on a remote sensing image to represent different categories in the field. The iterated conditional modes algorithm (ICM) is used for segmentation ...Read more
Author:Nabarro, FRNDate:30 Aug 1997The origin of the Peierls model and its relation to that of Frenkel and Kontorova are described. Within this model there are three essentially different formulae for the stress required to move a dislocation rigidly through a perfect lattice, ...Read more
Author:Roberts, DEDate:Dec 2013We derive from first principles an analytical expression for a figure of merit (FM) for a selective solar absorber in a single glazed flat plate water heater. We first show that the efficiency of a collector with an absorber with absorptance ...Read more