Now showing items 1156-1175 of 1403

    • Sailplane fuselage aerodynamic optimization using CFD 

      Swart, P.D. (North-West University (South Africa), 2020)
      In sailplane aerodynamic design, the foremost validation technique applied is computational fluid dynamics (CFD) simulation due to its ability to obtain accurate aerodynamic information without the need for a wind tunnel. ...
    • SARS risk profile indicator model evaluation 

      Theron, H.N. (North-West University (South Africa), 2019)
      Managing trade efficiently and in a cost-effective manner can greatly benefit the economy of a country. In South Africa, customs processes lead to many unnecessary delays seemingly without any underlaying reason. This ...
    • A scalable business model for mass customization of broadband services in the emerging Africa market 

      De Wet, Dawid Pieter (2012)
      Africa’s rapid adoption of the mobile phone is quickly closing the digital divide in voice services. But, just as one divide is closing, another one is widening. Consumers almost everywhere are demanding more services and ...
    • A scoping analysis of the neotronic design for a new South African research reactor 

      Vermaak, Jan Izak Cornelius (North-West University, 2011)
      Together with many other research reactors around the world, the SAFARI–1 reactor has been classified as an ageing research reactor. In order to continue the provision of the current irradiation services, the operator of ...
    • The selection and use of system development methodologies 

      Viljoen, Jacobus (North-West University (South Africa) , Potchefstroom Campus, 2016)
      Selection of system development methodologies (SDMs) are driven from characteristics of the organisation using the SDM, and the project to which the SDM is applied by individuals working on it. No figure is available for ...
    • A selection method for candidate systems engineers 

      Gonçalves, Duarte Paulo da Silva (North-West University, 2013)
      In South Africa there is a shortage of systems engineers which is being addressed by a systems engineering (SE) development program. The purpose of this research was to design a selection method that could be used to select ...
    • Selection of suitable sub-models for improved confidence in lumped parameter internal ballistic codes 

      Alzannan, K.Y.A. (North-West University (South Africa), 2019)
      Gun systems manufacturers, propellant manufacturers, ballisticians, and the users of gun systems heavily rely on interior ballistic simulations to describe projectile behavior from the initial point of propellant ignition ...
    • Self-sensing algorithms for active magnetic bearings 

      Niemann, Andries Christiaan (North-West University, 2008)
      Active magnetic bearings (AMBs) have become a key technology in industrial applications with a continued drive for cost reduction and an increase in reliability. AMBs require position feedback to suspend the rotor. ...
    • SEM image processing as an alternative method to determine chromite pre-reduction 

      Mohale, Given Terrance Mpho (2015)
      Ferrochrome (FeCr) is a crude alloy containing chromium (Cr) and iron (Fe). FeCr is mainly used for the production of stainless steel, which is an important modern-day alloy. FeCr is produced from chromite ore through ...
    • Separation by pervaporation of methanol from tertiary amyl methyl ether using a polymeric membrane 

      Van der Gryp, Percy (Potchefstroom University for Christian Higher Education, 2003)
      In this study, the sorption and pervaporation characteristics of the commercial PERVAP2256® membrane with methanol and tert-amyt methyl ether (TAME) mixtures were investigated. The feed concentration and the feed temperature ...
    • Separation of fluorocarbon gases from a reactor plasma system 

      Grunenberg, Alfred Teo (North-West University, 2008)
      South Africa has natural resources in mineral feedstock containing gold, manganese, chromium, vanadium, copper, antimony, phosphate rock, uranium, fluorspar and titanium. A high percentage of these ores are exported in ...
    • Separation of Grubbs-based catalysts with nanofiltration 

      Van der Gryp, Percy (North-West University, 2008)
      This thesis describes the use of organic solvent nanofiltration (OSN) in the field of metathesis for separating homogeneous Grubbs-type catalysts from their post-reaction mixtures for the model metathesis reaction of ...
    • Separation of hafnium from zirconium using membrane based solvent extraction 

      Malan, Daniël (North-West University (South Africa)., 2022)
      The need for purified Zr and Hf has become imperative with the development of the nuclear industry. Solvent extraction (SX) processes, such as the TBP and MIBK processes have been successfully applied for the industrial ...
    • Separation of SO2/O2 using membrane technology 

      Hlabano-Moyo, Bongibethu Msekeli (North-West University, 2013)
      The Hybrid Sulphur process is one technology out of a multitude of known technologies responsible for hydrogen production. Within the latter hydrogen production cycle, it is pivotal to recover O2 as a by-product from a ...
    • Separation of zirconium and hafnium via solvent extraction 

      Van der Westhuizen, Derik Jacobus (North-West University, 2010)
      Zirconium metal (Zr) is highly desirable as a cladding material for nuclear fuel rods in nuclear power plants, because of its very low nuclear absorption cross-section for thermal neutrons, however to use this Zr metal it ...
    • Shielding material selection for the disposal of radioactive waste from 𝟗𝟗𝐌𝐨 production 

      Gwayisa, Thato Dikeledi (North-West University (South Africa)., 2022)
      This study focuses on the radiation shielding performance of 4 types of concrete for the storage, road transport and final disposal of cemented intermediate-level liquid (radioactive) waste generated during the production ...
    • Short range reconnaissance unmanned aerial vehicle 

      Kersop, Stefanus Jacobus (North-West University, 2009)
      Unmanned aerial vehicles (UAVs) have been used increasingly over the past few years. Special Forces of various countries utilise these systems successfully in war zones such as Afghanistan. The biggest advantage is rapid ...
    • Signature analysis of the primary components of the Koeberg nuclear power station 

      Bezuidenhout, Jandré Albert (North-West University, 2010)
      In line with its commitment to safe nuclear power generation, the Koeberg Nuclear Power Station (KNPS) replaced the outdated vibration monitoring system with a modern on-line vibration monitoring system. This will allow ...
    • Simplified high-level investigation methodology for energy saving initiatives on deep-level mine compressed air systems 

      Vermeulen, J. (North-West University, 2018)
      Marginal deep-level mines in South Africa are struggling due to current economic conditions. Reducing operating cost on these marginal mines will increase their profitability. Electricity is one of the fastest growing ...
    • Simulating operational improvements on mine compressed air systems 

      Friedenstein, Brandon Miles (North-West University (South Africa). Potchefstroom Campus, 2018)
      As the operational costs of deep-level mines increase and gold ore grades decrease, profitability in the South African gold mining sector is becoming a challenge. Electricity tariff increases moreover contribute to the ...