Browsing Faculty of Engineering by Title
Now showing items 1052-1071 of 1122
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Towards designing an artefact evaluation strategy for human factors engineering: a lean implementation model case study
(Univ Stellenbosch, 2019)Applying scientific methods to the evaluation of design science research artefacts is necessary to recognise the design process as design science research. Prior work has reported on this crucial evaluation component; ... -
Towards industry 4.0: a roadmap for the South African heavy industry sector
(Stellenbosch Univ, 2019)The rapid growth and expansion of the Internet, as well as technical advances in the area of sensor technology, allow for the interconnection of physical objects for the purpose of achieving collective goals, which paves ... -
Towards lecture transcription in resource-scarce environments
(Pattern recognition association of South Africa (PRASA), 2012)We present progress towards automated Lecture Transcription (LT) in resource scarce environments. Our development has focused on the transcription of lectures in Afrikaans from two faculties at North-West University. A ... -
Towards PQ regulation in Southern Africa
(IEEE, 2009)This paper discuss the regulation of Power Quality (PQ) in Southern Africa from a user perspective -
Towards understanding the influence of SVM hyperparameters
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2010)We investigate the relationship between SVM hyperparameters for linear and RBF kernels and classification accuracy. The process of finding SVM hyperparameters usually involves a gridsearch, which is both time-consuming ... -
Trace element behaviour in the Sasol-Lurgi fixed-bed dry-bottom gasifier. Part 3. The non-volatile elements: Ba, Co, Cr, Mn, and V
(Elsevier, 2009)Coal contains most of the naturally occurring chemical elements in (at least) trace amounts, with specific elements and their concentrations dependent on the rank of the coal and its geological origins. The focus of this ... -
Trace element behaviour in the Sasol-Lurgi MK IV FBDB gasifier. Part 1. The volatile elements: Hg, As, Se, Cd and Pb
(Elsevier, 2008)Coal-fired power and heat production are the largest single source of Hg in the atmosphere, and in March 2005, the US-EPA ruled regarding Hg reduction from coal utilization in the USA. Appropriate Hg pollution control of ... -
Trace element behaviour in the Sasol-Lurgi MK IV FBDB gasifier. Part 2. The semi-volatile elements: Cu, Mo, Ni and Zn
(Elsevier, 2009)Gasification is a coal conversion process that could be considered to be more amenable with regards to environmental impact factors when compared to combustion, as it provides minimum direct emission to the atmosphere due ... -
Tracking translation invariance in CNNs
(Southern African Conference for Artificial Intelligence Research, 2020)Although Convolutional Neural Networks (CNNs) are widely used, their translation invariance (ability to deal with translated inputs) is still subject to some controversy. We explore this question using translation-sensitivity ... -
Trajectory behaviour at different phonemic context sizes
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2011)We propose a piecewise-linear model for the temporal trajectories of Mel Frequency Cepstral Coefficients during phone transitions. As with conventional Hidden Markov Models, the parameters of the model can be estimated ... -
Transformation of nitrogen functional forms and the accompanying chemical-structural properties emanating from pyrolysis of bituminous coals
(Elsevier, 2018)Characterisation of simultaneous changes in nitrogen functionalities and condensed aromatic crystallites during pyrolysis of bituminous coals was conducted. X-ray photoelectron spectroscopy (XPS) was utilised to determine ... -
The transient swelling behaviour of large (-20 + 16 mm) South African coal particles during low-temperature devolatilisation
(Elsevier, 2014)In order to predict coal behaviour during certain utilisation processes, and to improve and develop coal conversion technologies, it is important to understand the swelling behaviour and plastic properties of coal. X-ray ... -
Transmission line monitoring system for a power line inspection robot
(2013)Eskom has thousands-of-kilometres of transmission lines running across South Africa. The current methods of overhead power line inspection (foot patrols and air inspections) have been implemented for a long time now and ... -
Transport properties of chitosan membranes for zinc (II) removal from aqueous systems
(Elsevier, 2017)Chitosan materials that were prepared from different sources of fishery waste were subsequently characterized and the influence of molecular weight (Mw) and degree of deacetylation (DDA) on the chitosan-acetic acid solution ... -
Tumor cell culture survival following glucose and glutamine deprivation at typical physiological concentrations
(Elsevier, 2014)Objective Most glucose (and glutamine)-deprivation studies of cancer cell cultures focus on total depletion, and are conducted over at least 24 h. It is difficult to extrapolate findings from such experiments to practical ... -
Turbine investment optimisation for energy recovery plants by utilising historic steam flow profiles
(Elsevier, 2018)Burnable off-gases generated in engineering process plants are regularly utilised as energy sources. A common use is for steam production, where excess steam is allocated to power generation turbines. Fluctuating off-gas ... -
A two-dimensional analytic thermal model for a high-speed PMSM magnet
(IEEE, 2015)Permanent-magnet synchronous machines (PMSMs) are well suited for high-speed (HS) applications due to their high efficiency, power density, and dynamic response capability. The heat extraction area decreases as the ... -
Two-dimensional graphene-HfS(2) van der Waals heterostructure as electrode material for alkali-ion batteries
(RSC, 2020)Poor electrical conductivity and large volume expansion during repeated charge and discharge is what has characterized many battery electrode materials in current use. This has led to 2D materials, specifically multi-layered ... -
Ultrasonic assisted amaranth stem pretreatment for bio-ethanol production
(ETA-Florence Renewable Energies, 2015)An investigation was undertaken to determine the effect of ultrasound on enzymatic hydrolysis rate and enhanced bioethanol yields. Compositional analysis of the feedstock reveals that amaranth lignocellulose contains 36.35% ... -
Ultrasonic assisted biodiesel production
(ETA-Florence Renewable Energies, 2014)One of the biggest hurdles in the production of biodiesel is the high production cost compared to petroleum-derived diesel. Even though the mechanical agitation utilised during biodiesel production is effective, it is ...