• A reflective thematic analysis into the perceptions of pregnant radiographers regarding the usefulness of the Pregidose mobile app to enhance fetal dosimetry and well-being : qualitative exploration 

  Essop, Hafsa; Kekana, R.M. (Mable); Brosens, Jacques; Smuts, Hanlie (JMIR Publications, 2024)

  BACKGROUND : Pregnancy apps are widely used by pregnant women, who benefit from self-tracking features to support their health goals. Pregnant radiographers are considered a high-risk group of health workers practicing ...
• Optimal decarbonisation pathway for mining truck fleets 

  Yu, Gang; Ye, Xianming; Ye, Yuxiang; Huang, Hongxu; Xia, Xiaohua (KeAi Communications, 2024-09)

  The fossil fuel powered mining truck fleets can contribute up to 80% of total emissions in open pit mines. This study investigates the optimal decarbonisation pathway for mining truck fleets. Notably, our proposed pathway ...
• Deterioration models and market linked maintenance trigger based on big data for unpaved roads 

  Swanepoel, Tamryn L. (University of Pretoria, 2019-10)

  The consumer perception is a growing concern for the fresh farm produce market as external damage reduces the likelihood of purchase and thus reduces the economic value to the retailer and grower. One of the major ...
• The influence of ageing treatment on the microstructural evolution and the mechanical properties of the TI-6AL-4V alloy 

  Masete, Mosimanegape S. (University of Pretoria, 2017-02)

  The Ti-6Al-4V alloy is used in aerospace parts and its microstructure and properties can be controlled by solution treatment or solution treatment followed by ageing. However, there are different views on whether ...
• Chemical, thermogravimetric and elemental characterization of Nigerian groundnut and cowpea shells for sustainable valorization 

  Onyelucheya, Chioma Mary; Nwabanne, Joseph Tagbo; Daramola, Michael Olawale; Iwarere, Samuel Ayodele (IOP Publishing, 2024)

  In this study, the chemical, thermogravimetric, and elemental composition of Nigerian groundnut (Arachis hypogaea L.) and cowpea shells (Vigna unguiculata) were investigated to understand their potential as valuable waste ...
• Integrating demand response with unit commitment in insular microgrid considering forecasting errors and battery storage 

  Swami, Rekha; Gupta, Sunil Kumar; Bansal, Ramesh C. (Wiley, 2024-07)

  In this paper, DR programs are integrated with the unit commitment economic dispatch model for a single day to lower total operating costs for an insular microgrid. The proposed model takes into account the forecasting ...
• Multi agent framework for consumer demand response in electricity market : applications and recent advancement 

  Saini, Vikas K.; Kumar, Rajesh; Sujil, A.; Bansal, Ramesh C.; Ghenai, Chaouki; Bettayeb, Maamar; Terzija, Vladimir; Gryazina, Elena; Vorobev, Petr (Elsevier, 2024-12)

  Smart grid can offer load sharing and utilize distributed energy resources to reduce energy consumption costs and potentially earn revenue through energy services. Information and communication technologies (ICT) in the ...
• Time based stiction compensation 

  Gous, Gustaf Zacharias; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2024)

  Sticking valves tend to cause cycles in control systems used in industry, degrading product quality and yield. Many attempts have been made to alleviate the impact of stiction. Mechanical knockers are used with success ...
• The effect of disturbances on plant-model mismatch detection using the plant-model ratio : a surge tank case study 

  Mittermaier, Heinz Karl; Le Roux, Derik; Craig, Ian Keith (Elsevier, 2024)

  The surge tank in a bulk tailings treatment plant aims to reject flow and density disturbances. However, for large disturbances, there may be an inversion in the gain between the water inflow and tank slurry density for ...
• Stability-constrained contingency analysis for modern power systems 

  Ratnakumar, Rajan; Venayagamoorthy, Ganesh Kumar (Elsevier, 2024)

  Modern power systems comprise diverse nonlinear components, and an increasingly large number of low inertia renewable power sources necessitate the modernization of conventional power system security measures. Contingency ...
• Non-linear model predictive control to improve the mineralogical efficiency of flotation circuits 

  Oosthuizen, Dirk Johannes Jacobus; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2024)

  Flotation optimisation strategies often trade off grade for recovery, without attempting to improve the mineralogical efficiency of the flotation process as part of the automatic control and optimisation strategy. Non-linear ...
• Model-plant mismatch detection using the plant-model ratio : the influence of multivariable systems containing both fast and slow dynamics 

  Mittermaier, Heinz Karl; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2024)

  The plant-model ratio, developed to diagnose model-plant mismatch present in model-based controllers, inherits the same limitations from the frequency-based analysis that the method is based on. Nonetheless, the plant-model ...
• Impact of goaf gas drainage from surface vertical boreholes on goaf explosive gas zones 

  Wang, Yuehan; Si, Guangyao; Belle, Bharath K.; Webb, David; Zhao, Liang; Oh, Joung (Elsevier, 2024-03)

  Goaf gas drainage is extensively employed in Australian gassy underground coal mines to manage safety and productivity and to mitigate gas emissions. As mining operations reach greater depths and produce higher levels of ...
• Deploying artificial neural network to predict hybrid biodiesel fuel properties from their fatty acid compositions 

  Giwa, Solomon O.; Aasa, Samson A.; Taziwa, Raymond T.; Sharifpur, Mohsen (Taylor and Francis, 2024)

  Measurement-related problems have spurred fuel properties prediction using machine learning techniques. Improved fuel properties offered by hybrid biodiesel (HB) via mixed oils were predicted from their fatty acid compositions ...
• Modelling of consumer dynamics to improve fuel gas blending control 

  Sibiya, M.D.; Wiid, Andries Johannes; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2024)

  Although fuel gas systems represent a large part of industrial chemical processes, there has been limited literature on their modelling and control. The available literature typically neglects the effects of fuel gas ...
• Automatic tuning of level controllers in a flotation bank using Bayesian optimisation 

  Richter, Albertus Viljoen; Le Roux, Derik; Craig, Ian Keith (Elsevier, 2024)

  A flotation bank consisting of 6 cells in series under Single-Input-Single-Output (SISO) Proportional Integral (PI) level control is automatically tuned using Bayesian Optimisation (BO). Open loop step tests from the valve ...
• Current steering with sequential stimulation in cochlear implants 

  Roux, Johanie (University of Pretoria, 2017-12)

  Current steering has been proposed to increase place pitch resolution in cochlear implant (CI) users. Many studies have shown that a current steering effect can be achieved when simultaneous stimulation is used (Koch, ...
• Viability of cochlear travelling wave signal processing for cochlear implants 

  Schmidt, Larry (University of Pretoria, 2016-02)

  English: The travelling wave encodes acoustic information by stimulating the auditory nerve fibres. Understanding the travelling wave and its process is important for the development of cochlear implants speech processors. ...
• Signal processing by octopus cells for acoustic and electrical hearing : a modelling study 

  Blignaut, Gertruida Elizabeth (University of Pretoria, 2016-07)

  A computational model of a single octopus cell as well as a population of octopus cells was developed. The models were used to investigate the ability of octopus cells to compensate for the travelling wave delay, remove ...
• Nucleate pool boiling bubble dynamics for R32 and R1234yf on machined micro-structured surfaces 

  Van den Bergh, Wilhelm Johann; Whiting, Mitchell; Theodorakis, O.E.; Everts, Marilize (Elsevier, 2024-12)

  Efficient electronics cooling has always been a perpetual challenge, with the limits of single-phase cooling almost being reached. Two-phase cooling in the form of pool boiling is an attractive next step, with much research ...

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