Browsing Faculty of Engineering by Title
Now showing items 361-380 of 1122
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Estimating changes in seismic wave velocity from a pneumatic source in an operational mine
(SEG, 2019)Rock mass characteristics such as applied stress, pore pressure, and fracture density are coupled to the seismic wave propagation velocity. Therefore, measuring small relative changes of seismic wave velocities in operational ... -
ETFE-g-pentafluorostyrene: functionalization and proton conductivity
(Elsevier, 2015)In this study we propose a relatively simple and versatile method for the preparation of a polyelectrolyte membrane based on poly(pentafluorostyrene) (PFS) owing proton exchange functionalities for proton conducting ... -
Ethanol production from tropical sugar beet juice
(Academic Journals, 2012)Starch and sugar resources have been extensively researched to find a suitable renewable source of energy to supplement the world’s ever increasing demand for energy while also abating global warming by stemming the addition ... -
Evaluating acoustic modelling of lexical stress for Afrikaans speech synthesis
(Pattern Recognition Association of South Africa and Mechatronics International Conference, 2017)An explicit lexical stress feature is investigated for statistical parametric speech synthesis in Afrikaans: Firstly, objective measures are used to assess proposed annotation protocols and dictionaries compared to the ... -
Evaluating complex mine ventilation operational changes through simulations
(Univ Cape Town, 2018)Increasing the profitability of the mining industry is contingent on its ability to improve operational efficiency. Mine ventilation networks typically represent 25-50% of a mine’s energy consumption and, therefore, ... -
Evaluating the effectiveness of strategic environmental assessment to facilitate renewable energy planning and improved decision-making: a South African case study
(Taylor & Francis, 2020)Criteria for the evaluation of the effectiveness of Strategic Environmental Assessment (SEA) have evolved internationally from the requirement for mere procedural effectiveness, to include criteria such as substantial and ... -
Evaluating the feasibility of the 12L tax incentive for energy-intensive industries
(Univ Stellenbosch, 2017)Section 12L of the South African Income Tax Act (12L) aims to incentivise businesses to become more energy-efficient. However, claiming this benefit is a complex process that can become difficult, time-consuming, and costly ... -
Evaluating the impact of auxiliary fan practices on localised subsurface ventilation
(Elsevier, 2019)Mines are continually expanding in size and depth, leading to an increased reliance on localised subsurface ventilation systems. The use of underground auxiliary fans is a favoured method to increase and control airflow ... -
Evaluating the performance and emission reductions of a coal-derived low-smoke fuel in a conventional household stove
(IEEE, 2017)A low-smoke fuel (LSF) produced via the devolatilisation of coal lumps is proposed as an option to combat the health-damaging effects of domestic coal combustion. This study investigates the effect of the LSF particle size ... -
Evaluation and prediction of slow pyrolysis products derived from coals of different rank
(Elsevier, 2017)When coal is heated slowly (<10 °C/min), as in the Lurgi Fixed Bed Dry Bottom (FBDB) gasification process, products formed in the pyrolysis region of the gasifier include gas liquor, condensable tar, oil and non-condensable ... -
Evaluation of a detailed radiation heat tranfer model in a high temperature reactor systems simulation model
(Elsevier, 2008)Radiation heat transfer is a major mode of heat transfer in high temperature gas-cooled reactors (HTRs) because of the high operating temperatures. It is, however, a difficult phenomenon to calculate in full detail due to ... -
Evaluation of a domestic-use low-smoke fuel produced via the pyrolysis of lump coals
(International Pittsburgh Coal Conference, 2016) -
Evaluation of a facial recognition engines for a surveillance system
(IEEE, 2019)This paper presents the evaluation of a facial recognition system when considered in an operational context for the South African environment. Often, performance measures, such as recognition rate, are considered outside ... -
Evaluation of bio-char based products as hydrotreating catalysts for the production of renewable fuel
(2017)Increasing demand for alternative fuel from fossil fuel exists which has led to the development of new technologies for the production of bio-fuels. One such technology involves the hydrotreatment of vegetable oils such ... -
Evaluation of catalyst activity for release of hydrogen from liquid organic hydrogen carriers
(Elsevier, 2019)This contribution investigate the effect of parameters for production of hydrogen by catalytic dehydrogenation of perhydrodibenzyltoluene (H18-DBT). The sensitivity of the dehydrogenation reaction to temperature (290–320 ... -
An evaluation of configuration parameters affecting network coding on the data link layer in a wireless network
(IEEE, 2011)Network Coding, introduced in [2], promises significant theoretical capacity gains in multicast networks. Practical implementations in underlay networks are however quite complex in practice and performance is subject to ... -
Evaluation of cottonseed oil as co-feedstock for the hydroprocessing of petroleum middle distillates for diesel fuel production
(ETA, 2016)Mandatory blending of biodiesel into petroleum diesel came to effect in 2015 in South Africa. The availability of biodiesel to implement this mandate however poses a challenge for local biodiesel producers and petroleum ... -
Evaluation of covalently and ionically cross-linked PBI-excess blends for application in SO2 electrolysis
(Elsevier, 2015)Proton exchange membranes (PEM) containing various combinations of PPOBr (pol(2,6-dimethylbromide-1,4-phenylene oxide, covalently cross-linked) or PWN (poly(tetrafluorostyrene-4-phosphonic acid), ionically cross-linked) ... -
Evaluation of demodulation algorithms for robust self-sensing active magnetic bearings
(Elsevier, 2013)Active magnetic bearings (AMBs) play a key role in various industrial applications. In the ongoing challenge to reduce the number of external sensing devices and manufacturing costs of AMBs, self-sensing techniques have ...