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:Dunn, Dwain I; Snedden, Glen C; Von Backström, TWDate:Sep 2009In a gas turbine engine secondary flows have a detrimental effect on efficiency. The current numerical study is aimed at determining which turbulence model in a commercially available CFD code is best suited to predicting the secondary flows. ...Read more
Author:Butgereit, L; Coetzee, L; Smith, Andrew CDate:Oct 2011The “Internet of Things” is the paradigm of connecting physical objects (things) with digital intelligence to the Internet. People have been connecting to the Internet for decades. It is only recently that things have been able to connect to ...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:Jansen van Rensburg, Gerhardus J; Kok, SDate:Dec 2012Since plasticity is path dependent, it is necessary to properly take into account the deformation, strain rate and temperature history in applications such as crash worthiness and ballistics simulations. To accurately model the evolution of ...Read more
Author:Leigh, L; Helder, D; Behnert, I; Deadman, A; Fox, N; Leloglu, UM; Özen, H; Griffith, DDate:Jul 2011The Tuz Gölü site does demonstrate some challenges for being used as an absolute calibration site. These include: spatial and temporal variability on the order of +/- 0.02, atmospheric transmittance variability on the order of between 0.52 ...Read more
Author:Ramoroka, MT; Masonta, Moshe T; Kliks, ADate:Dec 2015The role of cheap and easy access to various telecommunication facilities is crucial for further community development. Such an observation is of particular importance for the developing countries all over the world since reliable and open ...Read more
Author:Masonta, Moshe T; Lysko, Albert A; Mekuria, FissehaDate:Oct 2012In wireless communication networks, radio frequency spectrum is the most important and very expensive resource. The TV digital
switchover (DSO) will leave a large portion of the TV frequency bands unused, known as TV white space (TVWS). In ...Read more
Author:Louis, DK; Hanson, I; Masonta, Moshe TDate:May 2016This paper introduces the Ghana Technology University College (GTUC) television white space (TVWS) network deployed in Accra, Ghana. The network, which is still work-in-progress, provides Internet connectivity to six Senior High Schools and ...Read more
Author:Mfupe, Luzango P; Mzyece, M; Mekuria, FissehaDate:May 2012Television White Spaces (TVWS) coupled with Dynamic Spectrum Access and Cognitive Radio (DSA-CR) technologies are increasingly viewed as key enablers to the bridging of the digital divide in rural areas. However, in order to realize maximum ...Read more
Author:Lamola, MM; Johnson, David; Lysko, Albert A; Zlobisnky, NatashaDate:Sep 2016Dynamic Spectrum Access (DSA) plays a vital role in opportunistic access to spectrum. A key component of DSA is preventing interference to the incumbent (primary) user from the secondary user. We present the results of an experiment to analyze ...Read more
Author:Lysko, Albert ADate:May 2021This invited talk summarises the key findings related to experimentation with and practics of television white spaces (TVWS).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:Botha, G; Barnard, EDate:Nov 2005Many applications of pattern recognition to natural language processing require large text corpora in a specified language. For many of the languages of the world, such corpora are not readily available, but significant quantities of text are ...Read more
Author:Ntshotsho, PhumzaDate:Oct 2015Ntshotsho and her colleagues sought to verify and characterise success in government’s efforts to restore degraded ecosystems through invasive alien plant management. Invasive alien plants pose a significant threat to South Africa’s biodiversity ...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