Author:Mwakikunga, Bonex W; Forbes, A; Sideras-Haddad, E; Arendse, CDate:Oct 2008Laser pyrolysis has been used to synthesize WO3 nanostructures. Spherical nano-particles were obtained when acetylene was used to carry the precursor droplet, whereas thin films were obtained at high flow-rates of oxygen carrier gas. In both ...Read more
Author:Akpakwu, GA; Hancke, GP; Abu-Mahfouz, Adnan MIDate:Feb 2022The Constrained Application Protocol (CoAP) is a lightweight web transfer protocol designed based on the REST architecture standardized by the Internet Engineering Task Force (IETF) to meet and accommodate the requirements of the constrained ...Read more
Author:Page, TPT; Du Plessis, AGDate:Mar 1998The objective of the work reported in this document was to compile training guidelines to address the hazards arising from electrical ignitions and fires in underground coal mines. The resulting training guidelines, which contain recommended ...Read more
Author:Smith, Marie E; Robertson, lain L; Bernard, StewartDate:Jun 2018Productive upwelling zones such as the southern Benguela can exhibit phytoplankton biomass variability over several orders of magnitude, from near oligotrophic offshore waters to hypertrophic inshore blooms of>100 mgm (sup-3). This introduces ...Read more
Author:Thomalla, Sandy J; Moutier, William; Ryan-Keogh, Thomas J; Gregor, Luke; Schutt, JuliaDate:Dec 2017Autonomous platforms will begin to address the space-time gaps required to improve estimates of phytoplankton distribution, which will aid in the quantification of baseline conditions necessary to detect long-term trends that can be attributed ...Read more
Author:Bello-Ochende, T; Simasiku, EM; Baloyi, JDate:Jul 2016In this paper, the geometrical parameters of two heat exchangers in a typical commercial aircraft’s ECS system are designed using the Entropy Generation Minimization (EGM) design technique. The irreversibilities of all the thermodynamic devices ...Read more
Author:Paige-Green, P; Pinard, MIDate:Sep 2012Sustainable upgrading of unsealed roads to a low volume sealed standard is best accomplished by maximising the use of the in situ materials within the prevailing road environment. Over the years and under traffic loading, unsealed roads achieve ...Read more
Author:Baloyi, J; Bello-Ochende, T; Meyer, JPDate:Jul 2015The focus of the world is the reduction of greenhouse gases like carbon dioxide, which contribute to the global warming currently experienced. Since most of the carbon dioxide emitted into the atmosphere is from fossil fuel combustion, ...Read more
Author:Stamp, J; Majozi, TDate:2011Heat integration to minimise energy usage in multipurpose batch plants has been in published literature for more than two decades. In most present methods, time is fixed a priori through a known schedule, which leads to suboptimal results. ...Read more
Author:Mamushiane, Lusani; Mwangama, J; Lysko, Albert ADate:Sep 2018Software Defined Networking (SDN) has emerged as a potential solution to the ICT inequality challenge in emerging markets. This technology promises to revolutionize the telecommunications industry by introducing decoupled architectures to ...Read more
Author:Debba, Pravesh; Carranza, EJM; Stein, A; Van der Meer, FDDate:Jul 2009The paper describes a novice method for sampling geochemicals to characterize mine tailings. The author’s model the spatial relationships between a multi-element signature and, as covariates, abundance estimates of secondary iron-bearing ...Read more
Author:Von Maltitz, Graham PDate:Apr 2017Southern African countries’ interest in biofuel is due of its rural development potential. Finding models to optimize this benefit is therefore paramount. High-energy-density crops with low perishability allow farmers to grow small quantities ...Read more
Author:Mkwelo, SimpiweDate:Oct 2015This presentation discusses the roles and uses of radar, radio frequency electronic warfare and optronics as operational defence systems.Read more
Author:Germishuizen, ADate:Jul 2005A number of the most successful drugs are going off patent in the next 5 years. Generic prescription drugs are continuously making up a larger proportion of the total drug market. Therefore, the drug delivery systems used to deliver the generic ...Read more
Author:Romero, J; Giovannini, D; McLaren, MG; Galvez, EJ; Forbes, A; Padgett, MJDate:Aug 2012We report orbital angular momentum (OAM) and angle correlations between signal and idler photons observed when the nonlinear crystal used in spontaneous parametric down-conversion is illuminated by a non-fundamental Gaussian pump beam. We ...Read more
Author:Patridge, TC; Demenocal, PB; Lorentz, SA; Paiker, MJ; Vogel, JCDate:1997Late Pleistocene variations in rainfall in subtropical Southern Africa are estimated from sediments preserved in the Pretoria saltpan, a 200,000 year-old closed-basin crater lake on the interior plateau of South Africa. This record is one of ...Read more
Author:Hamadou Ibrahim, A; Roux, FS; McLaren, M; Konrad, T; Forbes, ADate:Jun 2013The turbulence-induced decay of orbital-angular-momentum (OAM) entanglement between two photons is investigated numerically and experimentally. To compare our resultswith previouswork,we simulate the turbulent atmosphere with a single phase ...Read more