Browsing Conference Papers - Potchefstroom Campus by Title
Now showing items 543-562 of 713
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Production of value-added products from biodiesel derived crude glycerol
(ETA-Florence Renewable Energies, 2015)Crude glycerol, a by-product of biodiesel production which contain impurities such as methanol, triglycerides and catalysts, would represent a huge challenge to the environment if disposed. Thus the best opportunity is to ... -
A proposed method for evaluating the frequency response of 22 kV outdoor current transformers for harmonic measurements in renewable energy plant applications
(IEEE, 2019)With an increase in renewable energy plants connected to the national grid of South Africa the monitoring and assessment of power quality is becoming more important for utilities and independent power producers (IPPs). For ... -
A proposed model for South Africa to effectively recycle and dispose waste electrical and electronic equipment
(SAIIE, 2016)In South Africa there are daily occurrences of dumping of Waste Electrical and Electronic Equipment (WEEE), also called e-waste, at municipal refuse sites. WEEE is hazardous and comes from households and businesses and ... -
Protection relay loop measurement analysis
(IEEE, 2012)High voltage transmission system availability and system security are key performance criteria for electricity utilities worldwide. System disturbances need to be cleared quickly and accurately in order to minimise the ... -
Pseudo-magnetic centre identification of an active magnetic bearing for sensorless drive control start-up
(Elsevier, 2017)A method of identifying runout of an active magnetic bearing at standstill and low speed is presented. The on-line current bias injection method found in literature is improved, but is still found to converge too slowly ... -
Pulsar emission in the very-high-energy regime
(Sissa Medialab, 2015)The vast majority of the pulsars detected by the Fermi Large Area Telescope (LAT) display spectra with exponential cutoffs falling in a narrow range around a few GeV. Early spectral modelling predicted spectral cutoff ... -
Pulsations from the Vela pulsar down to 20 GeV with H.E.S.S. II
(Sissa Medialab, 2015)The Vela pulsar (PSR J0835 − 4510) is the brightest persistent source in the high-energy γ-ray sky. It is a relatively near, young and energetic rotation-powered pulsar. Vela was a key target for the High Energy Stereoscopic ... -
Pyrolysis product evaluation and prediction from coals of different rank
(International Pittsburgh Coal Conference, 2016) -
A qualitative assessment of the insulation systems of medium voltage induction motors
(IEEE, 2007)The research was an attempt to understand the condition of the insulation system and to classify the data according to its condition. Data mining processes was used to create a model to gain insight into the data and the ... -
Quality of supply data mining
(IEEE, 2014)Extracting useful network management information from a large volume of QoS data obtained all over a network can be simplified by innovative data mining techniques. The need for QoS expertise is reduced as interactive ... -
Quality research management improves design research effectiveness
(Univ Stellenbosch, 2019)Design research projects are often more complex than initially perceived due to a requirement for novelty, the creativity inherent in the design process, and the limited experience of novice researchers. Also, expectations ... -
Quantification of optimal electricity cost risk reduction for a South African gold mining company
(IEEE, 2014)Electricity cost risks such as carbon tax, ECS and unavoidable tariff increases threaten the financial wellbeing of South African gold mines. Some of these proposed cost risks are however not enforced as yet. However, once ... -
A quantitative model to evaluate post-implementation efficiency of Scrum
(IOS Press, 2010)In order to improve the information system development process many companies have adopted system development methodologies. Various evaluation methods and frameworks exist in the literature to assist companies during their ... -
Radio frequency interference detection using machine learning
(IEEE, 2016)Radio frequency interference (RFI) has plagued radio astronomy which potentially might be as bad or worse by the time the Square Kilometre Array (SKA) comes up. RFI can be either internal (generated by instruments) or ... -
Re-evaluation of the separation parameters based on the Berman-Olander long-bowl gas-centrifuge solution
(SAAM, 2014)The hydrodynamic equations for a long-bowl gas-centrifuge can be simplified to obtain a one-dimensional differential equation for the variation of the non-dimensional axial velocity in the radial direction. This equation ... -
Real-time monitoring of temperature distribution in a lithium-ion battery pack
(NWU, 2018)Intelligent battery management systems aim to continuously diagnose the state-of-health (SOH) of cells in a battery pack and predict performance, reliability and safety issues. Cells with a higher internal resistance ... -
Real-time power system oscillation monitoring using synchrophasor measurements
(IEEE, 2015)Inter-area oscillations impact negatively on power system stability and power transfer capability. Monitoring oscillations in real time can improve control of the power system. Synchrophasor data from Phasor Measurement ... -
Received power prediction of a terrestrial TV broadcasting transmitter using ordinary kriging interpolation
(SATNAC, 2014)Radio Environment Mapping (REM) provides information useful for many different applications in the telecommunications field. In this paper, the authors evaluate the ability of ordinary kriging (OK) to produce a REM ... -
Reconfiguring mining compressed air networks for cost savings
(IEEE, 2014)The ever-growing human population, limited energy resources and the effect of greenhouse gas emissions have become major global concerns for the energy sector. This includes the electricity generation sector. This dilemma ...