Author:Egambaram, Orielia P; Kesavan Pillai, Sreejarani; Ray, Suprakas SDate:Mar 2020UV radiation is one of the critical environmental stress factors for human skin, which can trigger various problems such as pruritus, burning, erythema, premature skin aging and skin cancer. Hence, UV protection has become an indispensable ...Read more
Author:Singh, M; Mukoma, Peter; North, Brian C; Majozi, TDate:Dec 2020Fossil fuels have earned a reputation as unsustainable sources of energy, due to the release of carbon emissions that are attributable to global warming. To overcome the extensive release of carbon emissions into the environment, different ...Read more
Author:Gouws, JF; Majozi, TDate:Jul 2008Wastewater minimisation in chemical processes has always been the privilege of continuous rather than batch plants. However, this situation is steadily changing, since batch plants have a tendency to generate much more toxic effluent compared ...Read more
Author:Suliman, Ridhwaan; Oxtoby, Oliver F; Malan, AG; Kok, SDate:Jan 2015A fully-coupled partitioned finite volume–finite volume and hybrid finite volume–finite element fluid-structure interaction scheme is presented. The fluid domain is modelled as a viscous incompressible isothermal region governed by the ...Read more
Author:Oxtoby, Oliver F; Malan, AGDate:May 2012In this paper we detail a fast, fully-coupled, partitioned fluid–structure interaction (FSI) scheme. For the incompressible fluid, new fractional-step algorithms are proposed which make possible the fully implicit, but matrixfree, parallel ...Read more
Author:Shi, X; Ahmad, S; Perez-Salcedo, K; Escobar, B; Zheng, Haitao; Kannan, AMDate:Jan 2019Oxygen can only be reduced at the quadruple phase boundary (catalyst, carbon support, ionomer and oxygen) of the cathode catalyst layer with non-conducting electrocatalyst. To maximize the quadruple phase boundary sites is crucial to increase ...Read more
Author:Sivakumar, V; Gizaw Mengistu, DT; Botai, OJDate:2009The aim of this work is to construct a model (mean) profile for ozone and water vapor in Southern hemisphere latitude using 14 years (1993-2006) of Halogen Occultation Experiment (HALOE) satellite data and about 10 years (1998-2007) of the ...Read more
Author:Dzikiti, Sebinasi; Jovanovic, Nebojsa; Bugan, Richard DH; Israel, S; Le Maitre, David CDate:Apr 2014Many studies have investigated the water relations of indigenous plants in the fynbos shrublands of the Cape, South Africa. These have mainly focused on understanding the mechanisms by which individual plant species respond to droughts, the ...Read more
Author:De Saxe, Christopher C; Cebon, DCDate:Mar 2019Articulated heavy goods vehicles and long combination vehicles offer improved efficiency and emissions but reduced low-speed manoeuvrability and high-speed stability compared to rigid lorries. Active control systems can help to address these ...Read more
Author:Andrew, J; Hanuman, A; Sithole, Bishop BDate:Jan 2011Contaminants from synthetic polymers such as plastics, coatings, adhesives and waxes remain one of the biggest challenges for papermakers using recovered fibre. These contaminants are called “stickies” because they stick to paper machine felts ...Read more
Author:Schulze, C; Dudley, Angela L; Brüning, R; Duparré, M; Forbes, ADate:Sep 2014We present the measurement of the orbital angular momentum (OAM) density of Bessel beams and superpositions thereof by projection into a Laguerre–Gaussian basis. This projection is performed by an all-optical inner product measurement performed ...Read more
Author:Schulze, C; Dudley, Angela L; Flamm, D; Duparre, M; Forbes, ADate:Jul 2013We demonstrate a versatile method for the measurement of the orbital angular momentum (OAM) density of an optical field. By performing a modal decomposition with digital holograms, we reconstruct the full optical field from a small set of ...Read more
Author:Ostensen, O; O'Brien, D; Cooper, Antony KDate:Feb 2008Natural variability and human influence on climate change are discussed, as well as the ISO Technical Committee ISO/TC 211, Geographic information / Geomatics, who has developed a suite of standards for geographic information that forms a ...Read more
Author:Van Deventer, Martha J; Snyman, RMMMDate:Mar 2004Knowledge economy literature indicates that proof of an organization's sustainable future and growth lies in multi-dimensional evaluation rather than in the traditional one-dimensional monetary or financial capital perspective. This article ...Read more
Author:Milione, G; Dudley, Angela L; Nguyen, TA; Chakraborty, O; Karimi, E; Forbes, A; Alfano, RDate:Feb 2015We experimentally measured the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams. Radially and azimuthally polarized vector Bessel beams were experimentally generated via a digital version of Durnin's ...Read more
Author:Machio, Christopher N; Nyabadza, D; Chikwanda, HK; Phasha, M; Sibanda, VMDate:Jun 2009A Ti-10wt.%Mg powder alloy has been produced by mechanical alloying. Elemental powders of Ti and Mg were ball milled in a Zoz-Simoloyer CM01 for 16 and 20 hours under argon. Mechanical alloying was followed by XRD, SEM and particle size ...Read more
Author:Pedrazzoli, D; Tuba, F; Khumalo, VM; Pegoretti, A; Karger-Kocsis, JDate:2014In this work the influence of synthetic boehmite alumina (BA) nanoparticles with various surface treatments on the morphology, crystallization behavior and mechanical properties of polypropylene copolymer (PP) nanocomposites was studied. In ...Read more
Author:Agbakoba, Victor C; Hlangothi, P; Andrew, Jerome E; Mathew, Maya JDate:Sep 2022There is a growing need for diversified material feedstock for 3D printing technologies such as fused deposition modelling (FDM) techniques. This has resulted in an increased drive in the research and development of eco-friendly biopolymer-based ...Read more