Now showing items 35-54 of 529

    • Backup bearing modelling for turbo machines with high axial and radial loads 

      Janse van Rensburg, Jan J.; Vanek, Christian; Worlitz, Frank (s.n, 2014)
      The use of active magnetic bearings (AMBs) in turbo machines is an active research topic and the implementation in industrial applications is becoming commonplace. This is especially true when investigating the backup ...
    • Behavioural thresholds in the context of information security 

      Snyman, D.P.; Kruger, H.A. (HAISA, 2016)
      This research presents the exploratory application of behavioural threshold theory on group behaviour related to information security. Behavioural threshold analysis is presented as a possible tool for aiding the development ...
    • Benefits of improved performance monitoring of mine cooling systems 

      Holman, A.M.; Heyns, G.P.; Pelzer, R. (IEEE, 2014)
      Mine cooling system components are an integral part of a mine's ventilation system. A mine's reliance on these capital intensive components are set to increase as mines deepen. Mine cooling systems consume up to a quarter ...
    • Bentonitc clay adsorption affinity for anionic and cationic dyes 

      Fosso-Kankeu, Elvis; Waanders, Frans; Fraser, Corinne (PSRC, 2014)
      The incidence of dye pollution in South Africa is quite alarming, requesting effective and affordable techniques to curb further degradation of the limited water resource. Adsorption is an attractive technique due to a ...
    • Blazar variability -- expect the unexpected 

      Zacharias, Michael (Sissa Medialab, 2018)
      Despite significant progress in both data taking and the development of theory, blazars keep offering surprises. While many frequency bands are now covered by long-term monitoring efforts on at least a few selected sources, ...
    • Block RAM implementation of a reconfigurable real-time PID controller 

      Le Roux, Rikus; Van Schoor, George; Van Vuuren, Pieter (IEEE, 2012)
      Despite the numerous advantages reconfigurable computing adds to a system, it is only advantageous if the execution time exceeds the configuration time. As a result of the long configuration time, reconfiguration is only ...
    • Brain-derived-neurotrophic-factor, dynamic retinal vessel responses during flicker light and stroke risk: the SABPA study 

      Wentzel, Annemarie; Malan, Leoné; Von Känel, Roland; Smith, Wayne; Malan, Nicolaas (Karger, 2019)
      Assessment of the retinal vessels’ structure and function provides an automated and objective approach to noninvasively assess the condition of the cerebral microvasculature and indicates susceptibility for stroke. ...
    • Broadband internet access for rural Africa: finding a viable model 

      Hoffman, Alwyn J.; De Wet, Dawid P. ((WSEAS) World Scientific and Engineering Academy and Society, 2011)
      While cellular communications have grown exponentially in Africa over the last 10 years, many parts of rural Africa still lack access to broadband Internet services. The question is posed whether this market can be ...
    • Business case for industrial DSM maintenance 

      Groenewald, H.J.; Van Rensburg, J.F.; Marais, J.H. (IEEE, 2014)
      The performance of industrial DSM projects often deteriorates without proper maintenance. Underperforming DSM projects waste money and increase the demand for electricity from Eskom. A solution to this problem is dedicated ...
    • Calibration of statistical methods used to constrain pulsar geometries via multiband light curve modelling 

      Bezuidenhout, M.C.; Venter, C.; Seyffert, A.S.; Harding, A.K. (SAIP, 2016)
      Since its launch in 2008, the Fermi Large Area Telescope (LAT) has detected over 200 γ-ray pulsars above 100 MeV. This population of pulsars is characterised by a rich diversity of light curve morphologies. Researchers ...
    • Carbon dioxide pollution reduction through load shift projects 

      Brand, H.G.; Vosloo, J.C.; Bolt, G.D. (IEEE, 2014)
      Significant advances have been made in automation technology allowing systems to shift electricity consumption from peak periods to off-peak periods. Load shift projects have been implemented throughout South Africa for ...
    • Carbon‐14 radiolabeling and tissue distribution evaluation of MMV390048 

      Sonopo, Molahlehi S.; Zeevaart, Jan R.; Pillay, Adushan; Chibale, Kelly; Marjanovic-Painter, Biljana (Wiley, 2016)
      The antimalarial compound MMV390048 ([14C]-11) was labeled with carbon-14 isotope via a 3-step synthesis. It was obtained in a 15.5% radiochemical overall yield from carbon-14 labeled methyl iodide with a radiochemical ...
    • The cardiovascular safety of Pheroid® in the conscious rat 

      Van Wyk, Riaan; Guth, Brian D.; Grobler, Anne F.; Bester, Cor (Elsevier, 2019)
      The Pheroid® technology is a patented colloidal drug delivery system comprised of a dispersed oil phase of omega 3 and omega 6 fatty acids emulsified in N2O saturated water. Pheroid® has pharmaceutical applicability for ...
    • Cascade disruption of generation: a special focus on African grid volnurebilities 

      Viljoen, Machiel; De Kock, Jan A. (IEEE, 2011)
      Large scale network disruption often lies at the heart of regional blackouts, and often disrupts entire communities in terms of their normal activities and well being. Disruptions caused by cascading failure of generating ...
    • Cascade disruption of generation: the hidden gift of failure 

      Viljoen, Machiel; De Kock, Jan A. (IEEE, 2012)
      Large scale network disruption often lies at the heart of regional blackouts, and often disrupts entire communities in terms of their normal activities and well being. Recognizing the threat posed by such disturbances, ...
    • Cathodic protection system design framework 

      Diedericks, Dewald E.; Van Schoor, George; Ranft, Eugén O. (IEEE, 2019)
      The aim of this article is to establish a cathodic protection (CP) system design framework for the petrochemical industry in South Africa. The CP system design framework is destined to be used as a guideline when designing ...
    • A census of South African industrial engineers, based on data extracted from Linkedin 

      Van Dyk, L. (SAIIE, 2014)
      The first South African Industrial Engineers graduated in 1963. Since then, the number of graduates per annum has grown to more than 200 per annum. Many of these Industrial Engineers use the social network, LinkedIn, to ...
    • Centaurus A: hard X-ray and soft gamma-ray lightcurve correlation 

      Davids, I.D.; Böttcher, M.; Backes, M. (Sissa Medialab, 2017)
      Centaurus A (Cen A), powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its gamma-ray flux, both in the ...
    • Central stellar populations of brightest cluster galaxies 

      Viljoen, D.N.; Laubser, S.I. (South African Institute of Physics, 2014)
      We analyse the stellar populations of a sample of brightest cluster galaxies (BCGs), for which high signal-to-noise ratio, long-slit spectra were obtained on the Gemini telescopes, by fitting their spectra using the software ...
    • CFD analysis of thermal dispersion in a structured packed bed 

      Vermaak, H.J.; Du Toit, C.G. (SACAM, 2018)
      Packed beds are generally modelled in a partial manner to avoid computational costs. This implies that only a small portion of the representative bed is modelled explicitly in CFD simulations, usually by assuming ...