Now showing items 44-63 of 698

    • 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 ...
    • Bio-butanol fermentation using clostridium acetobutylicum and clostridium tetanomorphum in modified bioreactor flasks 

      Ndaba, Busiswa; Chiyanzu, Idan; Marx, Sanette (ETA-Florence Renewable Energies, 2015)
      An alternative new generation biofuel to bio-ethanol has attracted researchers to investigate various approaches for optimization of traditional ABE fermentation to enable bio-butanol to be produced cheaper at an industrial ...
    • Bio-oil and bio-char production from sunflower hulls 

      Van der Gryp, Percy; Baumgarten, Ulrich; Marx, Sanette; Schabort, Corneels (ETA-Florence Renewable Energies, 2011)
      In this paper, the hydrothermal liquefaction of sunflower hulls into bio­oil and bio­char is presented. The main manipulated variables that were studied were biomass load, catalyst type and temperature. The experimental ...
    • Bioethanol from cassava for a community project 

      Marx, S.; Nquma, T.Y.; Obiero, G.O. (ETA-Florence Renewable Energies, 2010)
      Although the North-West Province of South Africa is renowned for its platinum industry, wildlife tourism and Casino resorts, its people are among the poorest in South Africa. The Thusanang community project concept was ...
    • Biological reduction of COD and sulphate by SRB in anaerobic moving bed biofilm reactor under high metal loading conditions 

      Akinpelu, Enoch A.; Fosso-Kankeu, Elvis; Waanders, Frans; Ntwampe, Seteno K.O. (EARET, 2018)
      The performance of an anaerobic moving bed biofilm reactor (MBBR) containing AnoxKaldnesTM K5 model for the treatment of raw acid mine drainage (AMD) was investigated for the reduction of sulphate and chemical oxygen ...
    • Biosorption of cadmium from water using surfactant impregnated eggshell 

      Fosso-Kankeu, Elvis; Steenekamp, Gerhard; Akinpelu, Enoch; Waanders, Frans (EARET, 2018)
      Cadmium (Cd) is regarded as one of the most toxic elements and it causes water pollution when it exceeds the permissible limit. It is currently present in the Mooi River above these permitted levels, and must therefore ...
    • 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. ...
    • Brewery effluent sludge characterization and dewatering to increase potential water recycling capabilities 

      Fosso-Kankeu, Elvis; Van der Vyver, Christiaan; Moyakhe, Dumisane; Waanders, Frans; De Klerk, Corli (EARET, 2018)
      In this study various coagulants and flocculants were tested for optimum removal of COD from brewery wastewater. The coagulants used were ferric chloride and an organic coagulant mixture obtained from the brewery company. ...
    • 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 ...
    • Calorimetric neutrino expectations from bright blazar flares 

      Kreter, Michael; Böttcher, Markus; Kadler, Matthias; Krauss, Felicia; Buson, Sara (Sissa Medialab, 2019)
      Blazar jets are extreme environments, in which relativistic proton interactions with an ultraviolet photon field could give rise to photopion production. High-confidence associations of individual high-energy neutrinos ...
    • 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 ...