Browsing Faculty of Engineering by Title
Now showing items 871-890 of 1129
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Radial variation in porosity in annular packed beds
(Elsevier, 2008)This paper describes the results of a study of the variation in the radial direction in the porosity of annular packed beds. A comparison is made between the predictions by a number of empirical correlations found in ... -
The Radial Variation of the Solar Wind Turbulence Spectra near the Kinetic Break Scale from Parker Solar Probe Measurements
(American Astronomical Society, 2023)In this study we examine the radial dependence of the inertial and dissipation range indices, as well as the spectral break separating the inertial and dissipation range in power density spectra of interplanetary magnetic ... -
The random pore model with intraparticle diffusion for the description of combustion of char particles derived from mineral- and inertinite rich coal
(Elsevier Science, 2011)An investigation was undertaken to determine the applicability of the random pore model with intraparticle diffusion for the determination of the reaction kinetics for the combustion of chars particles derived from coals ... -
Rapid development of TTS corpora for four South African languages
(Interspeech 2017, 2017)This paper describes the development of text-to-speech corpora for four South African languages. The approach followed investigated the possibility of using low-cost methods including informal recording environments and ... -
Rapid microwave-assisted liquid phase conversion of bio-ethanol to n-butanol over a heterogeneous catalyst
(Taylor & Francis, 2018)A sustainable bio-based fuel industry is dependent on finding efficient technologies for the production of biofuels. A microwave-assisted method to produce bio-butanol from bio-ethanol in liquid phase was investigated using ... -
Reactivity of Fe salts in the destabilization of acid mine drainage employing mixing and shaking techniques without pH adjustment
(Elsevier, 2016)Ferric chloride and Fe-sulphates are commonly Fe-salts used in water treatment, and the iron ionizes to form Fe3 + or Fe2 + when reduction occurs. A volume of 200 mL acid mine drainage (AMD) sample was poured into five 500 ... -
Reactivity study of fine discard coal agglomerates
(Elsevier, 2015)In this laboratory study thermo-gravimetric analyses were conducted to determine the influence of the addition of an alkaline metal catalyst (K2CO3 incorporated into a fine discard coal agglomerate mixture by physical ... -
Reactor technology options for distributed hydrogen generation via ammonia decomposition: a review
(Elsevier, 2013)Hydrogen (H2) fuel obtained via thermo-catalytic ammonia (NH3) decomposition is rapidly attracting considerable interest for portable and distributed power generation systems. Consequently, a variety of reactor technologies ... -
Real-time displacement analysis and correction system for vibration forces on rotor of rotational active magnetic bearing system
(Emerald, 2011)The real-time displacement analysis and correction of vibration forces on the rotor of a rotational active magnetic bearing (AMB) system were performed. The real-time system performs four main tasks: fault detection, fault ... -
Real-time modeling of retractable self-launching glider using spreadsheets
(Emerald, 2017)Purpose This paper aims to propose a spreadsheet method for modeling and simulation of a retraction system mechanism for the retractable self-launching system for a high-performance glider. Design/methodology/approach More ... -
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 ... -
Recovery of iron nanoparticles from mine wastewater using plant extracts of Eucalyptus Globulus, Callistemon Viminalis and Persea Americana
(MDPI, 2020)Mine wastewater (MW) is often rich in heavy metals that can have measurable effects on humans. The storage and treatment of MW remains a challenge for most mining companies. Iron (Fe) in MW was removed by using extracts ... -
Reducing atmosphere ash fusion temperatures of amixture of coal-associated minerals: the effect of inorganic additives and ashing temperature
(Elsevier, 2014)The influence of the ashing temperature and inorganic additives on the reducing-atmosphere ash fusion temperatures of a mixture of coal-associated minerals was investigated. Different inorganic compounds were added to the ... -
Reducing DLOFC fuel temperatures by mixing thorium with LEU in a single-zone six-pass fuel cycle in a PBMR-DPP-400 core
(ANS (American Nuclear Society), 2016)Many studies have been done in neutronics and thermal-hydraulic simulation of the standard 6-pass fuel recirculation scheme for the standard 9.6 wt % enriched, 9 g per fuel sphere low-enriched uranium (LEU) fuel in the ... -
Reducing the communication costs of a remote monitoring and maintenance system for an energy services company (ESCo)
(SAIIE, 2016)Demand-Side Management (DSM) initiatives can result in substantial electricity cost reductions. Energy Service Companies (ESCos) typically perform remote monitoring and maintenance to ensure sustained performance of these ... -
Reduction of caking propensity in large (millimeter-sized) South African coal particles with potassium carbonate impregnation to expand fixed- and fluidized-bed gasification feedstock suitability
(ACS, 2015)The caking propensity of coal causes challenges in combustion, gasification, and fluidized-bed applications, where this property limits coal selection. Certain gasifiers are fitted with mitigation technologies such as ... -
Reduction of salinity of water using acrylamide-based polyampholyte
(EARET, 2018)Polyampholytes are charged macromolecules, which carry both acidic and basic groups. These groups dissociate, leaving ions on chains and counter ions in solution, under appropriate conditions, ... -
Reflective team meetings: a learning experience for first-year engineering students in joint projects
(IEEE, 2018)The aim of this research was to report on reflective team meetings as a learning experience for first-year engineering students in joint projects. To some extent, working in joint projects is new to first-year students ... -
Regenerator for Varshamov-tenengolts-like synchronisation error correcting codes
(IEEE, 2008)Synchronisation errors, that is, the insertion of additional or deletion of valid symbols, are the most difficult class of errors to correct - containing the class of additive errors as a subset. A regenerating algorithm, ...
