Author:Ngcobo, Sandile; Ait-Ameur, K; Litvin, I; Hasnaoui, A; Forbes, ADate:Sep 2013We outline a simple laser cavity comprising an opaque ring and a circular aperture that is capable of producing spatially tuneable laser modes, from a Gaussian beam to a Flat-top beam. The tuneability is achieved by varying the diameter of ...Read more
Author:Chi, B; Hou, S; Liu, G; Deng, Y; Zeng, J; Song, H; Liao, S; Ren, JianweiDate:Jun 2018The wettability, or hydrophobic-hydrophilic balance, of cathode catalyst layer influences the performance of the proton exchange membrane fuel cell. In this paper, cathode catalyst layer with different polytetrafluoroethylene contents are ...Read more
Author:Chi, B; Hou, S; Liu, G; Deng, Y; Zeng, J; Song, H; Liao, S; Ren, JianweiDate:Jul 2018The wettability, or hydrophobic-hydrophilic balance, of cathode catalyst layer influences the performance of the proton exchange membrane fuel cell. In this paper, cathode catalyst layer with different polytetrafluoroethylene contents are ...Read more
Author:Wahab, OO; Olasunkanmi, LO; Govender, Krishna; Govender, PPDate:Jun 2019Effects of substituent groups on aqueous solubility, chemical reactivity and absorption wavelength of Disperse red 73 (DR73) were theoretically investigated using density functional theory (DFT) method. This study is in view of introducing ...Read more
Author:Salehiyan, Reza; Ray, Suprakas SDate:Oct 2018This article critically reviews the detailed fundamental understanding of the influence of conductive nanoparticle migration on the localization, and hence, electrical conductivity of immiscible polymer blend nanocomposites. Three types of ...Read more
Author:Opoku, F; Govender, Krishna; Van Sittert, CGCE; Govender, PPDate:Sep 2018The depleting sources of non–renewable fossil fuels and their adverse effect on the environment have driven the global interest to find an efficient and suitable material for hydrogen generation via a water splitting process. In this theoretical ...Read more
Author:Mofokeng, Tladi G; Ray, Suprakas S; Ojijo, Vincent O; Salehiyan, RezaDate:Sep 2017The present study reports the dependence of the nano/micro-structure and properties of polypropylene (PP)/ethylene vinyl acetate (EVA)/nanoclay ternary composites on the kinetics and thermodynamics of the melt-mixing process. The size of ...Read more
Author:Agboola, BO; Ozoemena, KI; Nyokong, T; Fukuda, T; Kobayashi, NDate:Mar 2010The integration of phenylamine-functionalised SWCNTs (SWCNT-phenylamine) with a novel cobalt (II) octa[(3,5-biscarboxylate)-phenoxy] phthalocyanine (CoOBPPc) complex has been described. The physical and electrochemical properties of the ...Read more
Author:Prabhakar, Shashi; Mabena, Chemist M; Konrad, T; Roux, FSDate:Jan 2018The effect of a decoherence channel, such as a turbulent atmosphere, on the second-order quantum interference in the Hong-Ou-Mandel (HOM) effect is investigated. The investigation includes both theoretical analyses and an experimental ...Read more
Author:Gelderblom, CM; Van Wilgen, BW; Nel, JL; Sandwith, T; Botha, M; Hauck, MDate:Jul 2003The Cape Floristic Region and adjoining marine areas have exceptionally high levels of biodiversity and endemism, concentrated in a relatively small area of 90,000 km2. Major threats to this biodiversity include the loss of habitat to ...Read more
Author:Forbes, A; Dudley, Angela L; Roux, SDate:Dec 2010Research at the Mathematical Optics Group uses "twisted" light to study new quatum-based information security systems. In order to understand the structure of "twisted" light, it is useful to start with an ordinary light beam with zero twist, ...Read more
Author:Ndebele, Bright B; Gledhill, IMADate:Sep 2023The dynamics of two-dimensional vortex shedding from a rotating cluster of three cylinders was investigated using Computational Fluid Dynamics (CFD) and Dynamic Mode Decomposition (DMD). The cluster was formed from three circles with equal ...Read more
Author:Grobler, AJ; Holm, SR; Van Schoor, GDate:Nov 2015(PMSMs) are well suited for high-speed (HS) applications due to their high efficiency, power density, and dynamic response capability. The heat extraction area decreases as the speed increases, making thermal effects more dominant at high ...Read more
Author:Shou, KJ; Napier, JALDate:Sep 1999A new displacement discontinuity method is developed for the analysis of multi-layered elastic media. This approach is based on a novel superposition scheme and the analytical solution to the problem of a displacement discontinuity element ...Read more
Author:Smit GJF; Wilms JM; Diedericks GPJDate:Nov 2010Models that are used for the simulation of two-phase flows in coastal dynamics make extensive use of empirical data. The main focus of this investigation is to develop models for specific aspects of two-phase flows that are based on physical ...Read more
Author:Nabarro, FRNDate:Sep 2000The structure and properties of two families of lattice-coherent composites, those based on gamma' Ni3Al and those based on TiA/Ti3Al, are shown to have strong similarities. The coherent system of cubic/tetragonal Y2O3-stabilized ZrO2 is ...Read more
Author:McLaren, M; Romero, J; Padgett, MJ; Roux, FS; Forbes, ADate:Sep 2013In this paper we consider geometrical two-photon optics of Bessel-Gaussian modes generated in spontaneous parametric down-conversion of a Gaussian pump beam. We provide a general theoretical expression for the orbital angular momentum (OAM) ...Read more
Author:Stewart, TJ; Ittmann, HWDate:1979A study of the economic distribution of maize throughout South Africa is reported. Although the problem of minimizing total transportation costs in such a situation is a classical one, and its solution is well known, there was in this case a ...Read more
Author:Fernandes, PJLDate:Mar 1998This article discusses the outcome of an investigation of the failure of copper tubes from cold water distribution system carrying potable water in a shopping centre. Samples of copper tubes from a cold water distribution system which had ...Read more