Now showing items 1-20 of 998

    • Accelerating the fatigue life characterization of composite sailplane structures - a novel approach 

      Van der Walt, L.P. (North-West University (South Africa), 2020)
      Current accepted methods of composite sailplane life certification are based on full scale structural testing of the aircraft’s wing. Two accepted test procedures exist, namely a static test to an elevated load level and ...
    • Activation functions in deep neural networks 

      Pretorius, A.M. (North-West University (South Africa), 2020)
      The ability of machine learning algorithms to generalize is arguably their most important aspect as it determines their ability to perform appropriately on unseen data. The impres-sive generalization abilities of deep ...
    • Adapting a pronunciation dictionary to Standard South African English for automatic speech recognition 

      Martirosian, Olga Meruzhanovna (North-West University, 2009)
      The pronunciation dictionary is a key resource required during the development of an automatic speech recognition (ASR) system. In this thesis, we adapt a British English pronunciation dictionary to Standard South African ...
    • Adaptive binarization of legacy ionization chamber cosmic ray recordings 

      Steyn, André (2012)
      In the 1930s, the Carnegie Institute in Washington DC initiated the construction of cosmic ray observation centres around the world. Cosmic ray activity was recorded using the model C cosmic ray ionization chamber which ...
    • Adaptive control of an active magnetic bearing flywheel system using neural networks 

      Combrinck, Angelique (North-West University, 2010)
      The School of Electrical, Electronic and Computer Engineering at the North-West University in Potchefstroom has established an active magnetic bearing (AMB) research group called McTronX. This group provides extensive ...
    • An adaptive econometric system for statistical arbitrage 

      Visagie, Gabriel Jan Andries (North-West University (South Africa) , Potchefstroom Campus, 2017)
      This dissertation suggests an adaptive system that could be used for the detection and exploitation of statistical arbitrage opportunities. Statistical arbitrage covers a variety of investment strategies that are based on ...
    • An adaptive econometric system for statistical arbitrage 

      Visagie, Gabriel Jan Andries (North-West University (South Africa) , Potchefstroom Campus, 2017)
      This dissertation suggests an adaptive system that could be used for the detection and exploitation of statistical arbitrage opportunities. Statistical arbitrage covers a variety of investment strategies that are based on ...
    • Adsorbent assisted drying of fine coal 

      Peters, Elmarie Sunette (North-West University (South Africa) , Potchefstroom Campus, 2016)
      Coal fines are generated by the increase in mechanization on coal mines, and have the ability to retain large amounts of moisture due to its inherently large surface areas (Reddick et al., 2007). The bulk of the moisture ...
    • Advanced four-dimensional trajectory generation for tactical guidance of unmanned aerial vehicles 

      Otto, G. (North-West University (South Africa), 2020)
      A strategy is presented for the real-time generation of tactical, dynamically feasible 4D trajectories. The current framework for automatic flight control is analysed, along with current research into autonomous unmanned ...
    • Advanced linear methods for T–tail aeroelasticity 

      Van Zyl, Louwrens Hermias (North-West University, 2011)
      Flutter is one of the primary aeroelastic phenomena that must be considered in aircraft design. Flutter is a self-sustaining structural vibration in which energy is extracted from the air flow and transferred to the ...
    • Aerodynamic analysis and design of a solar powered vehicle using CFD 

      Fourie, Armand Zybrand (North-West University (South Africa) , Potchefstroom Campus, 2016)
      The need for solar-powered vehicles is increasing as the threat of depletion of non-renewable energy sources, such as oil, increases. This gives reason for developing electric vehicles powered by renewable energy sources, ...
    • The aeroelastic tailoring of a high aspect-ratio composite structure 

      Van den Bosch, Taeke Nicolai (2014)
      The aim of this investigation was to review literature for the most suitable aeroelastic tailoring analysis tools for long slender composite structures, and integrate them into an aeroelastic tailoring process. The JS1C ...
    • Algae liquefaction 

      Baloyi, Hope (North-West University, 2012)
      The liquefaction of algae for the recovery of bio–oil was studied. Algae oil is a non–edible feedstock and has minimal impact on food security and food prices; furthermore, it has been identified as a favourable feedstock ...
    • Alternative electricity generation : Safripol as a case study 

      Vorster, Johan Christi (2014)
      Electrical energy supply in South Africa, provided by ESKOM, has become more expensive with regular price increases in the past seven years. Increases on an annual basis have seen the Mega flex tariffs quadruple in the ...
    • Alternative method for equipment condition monitoring on South African mines 

      Cloete, G.J. (North-West University, 2018)
      The practicality of accurate condition monitoring and fault diagnostics depends on the type of parameter measured and the accuracy of the measurement. In the South African mining industry, it is common to find large ...
    • Analysing DSM opportunities on mine conveyor systems 

      Marais, Johannes Hendry (North-West University, 2007)
      The demand for electricity around the globe is increasing at an alarming rate. South Africa is no exception with electricity demand that has increased to a point where it is close to the maximum available capacity. Most ...
    • Analysing electricity cost saving opportunities on South African gold processing plants 

      Hamer, Waldt (2014)
      Costs saving measures are important for South African gold producers due to increasing energy costs and decreasing production volumes. Demand Side Management (DSM) is an effective strategy to reduce electricity consumption ...
    • Analysing mine energy management considering utility demand 

      Shaw, W.G. (North-West University (South Africa), 2019)
      This dissertation was completed using an article-based format. Article 1 has been submitted to the Journal of Energy in Southern Africa and Article 2 to Sustainable Energy Technologies and Assessments. In the past, the ...
    • Analysing the effect of DSM projects at South African cement factories 

      Spangenberg, Johannes Paulus (2015)
      In any developing country an increasingly higher demand for electricity supply exists. South Africa experienced load shedding during late 2007 and early 2008 and again in 2014 due to a supply shortfall. New power stations ...
    • Analysing the impact of pre-cooling on mine refrigeration systems 

      Biermann, Waldo (North-West University (South Africa), Potchefstroom Campus, 2017)
      Globally the mining sector is facing a harsh economic climate, with sharp increases in production costs and decreased productivity. In South Africa the situation is worsened by the continuous increase in labour and electricity ...