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Recent submissions

Department of Electrical and Mining Engineering: Recent submissions

Now showing items 21-40 of 87

Investigation and analysis of premature failure of valve regulated lead acid batteries

Mohale, Jan Moses (2021-01-29)

Over the past fifty years Valve Regulated Lead Acid (VRLA) battery has been deployed with Uninterruptable Power Supplies (UPS) backup systems as a last line of defense against primary power outages, due to its affordability ...
Assessment of wind power potential as a renewable energy source in Western Cape, South Africa

Tshibanda, Mbuyamba (2022)

The worldwide utilisation of renewable energy in electric power systems is growing rapidly due to concerns about the environment and the depletion of the sources of conventional power generation. The Weibull distribution ...
Detection and identification of faulty modules in a large-scale photovoltaic installation

Yokwana, Xolani Phillip (2020-01)

The global warming and realisation that fossil fuel is limited, has been a drive over the years to move to renewable energy sources (RES). Consequently, solar energy and other renewable energy sources are currently being ...
A multiphysics model for the numerical simulation of wet balls mills

Nkomo, Fortune (2022-06)

There exists a need to understand the behaviour of wet mill loads by numerical simulation. However, the challenge is to adequately combine solid-based and liquid-based computer algorithms into one realistic framework. This ...
Renewable hybrid polygeneration system from various unconventional feedstock

Shahid, Hussain Ansari (2021-02)

The production of low-carbon energy products from biomass gasification is encouraged, in order to expand our sources of energy and to mitigate the harmful impact of the pollutants on the climate and the environment. The ...
Development of neural network-based speech/non-speech discrimination algorithm for audio files

Redelinghuys, Herman (2022-01)

For research in speech processing and analysis of audio content in general, extensive data sets are required. Creating such a dataset manually turns out to be time and labour consuming, but it is a task very suitable ...
A machine learning based credit card fraud detection using the GA algorithm for feature selection

Ileberi, Emmanuel; Sun, Yanxia; Wang, Zenghui (2022-02-25)

The recent advances of e-commerce and e-payment systems have sparked an increase in financial fraud cases such as credit card fraud. It is therefore crucial to implement mechanisms that can detect the credit card fraud. ...
Classification and severity prediction of maize leaf diseases using Deep Learning CNN approaches

Sibiya, Malusi (2021-06)

Maize (zea mays) is the staple food of Southern Africa and most of the African regions. This staple food has been threatened by a lot of diseases in terms of its yield and existence. Within this domain, it is important ...
Fabrication of S-shaped micron-sized constrictions on FeC (steel) surface using femtosecond laser ablation with beam shaping

Umenne, Patrice (Springer, 2021-09-14)

In this paper, we demonstrate the fabrication of S-shaped micron-sized constrictions on steel (Fe3CII) surface using the femtosecond laser ablation technique. The femtosecond laser used has a wavelength of 775 nm, a power ...
Weather classification from still images using ensemble method

Oluwafemi, Ajayi Gbeminiyi (2021-01)

In the field of computer vision, multi-class outdoor weather classification is a difficult task to perform due to diversity and lack of distinct weather characteristic or features. This research proposed a novel framework ...
Design of a Fingerprint Biometric Access Control System with GSM Functionality

Govender, Terene; Umenne, Patrice (IEEE, 2021-08-05)

We live in a world with ever-increasing digital technology, hence the need for enhanced security systems is vital. In the past a simple PIN or password would have been sufficient to maintain the integrity of security ...
Marine Aquarium Temperature Controller and the IoT (Internet of Things)

Jordaan, Gerrit; Umenne, Patrice (IEEE, 2021-08-05)

This system monitors and controls the temperature in a marine aquarium. This system measures the water temperature in an aquarium and then uses a heater and cooling fan to control the temperature within a range of 25-27°C. ...
Improving the performance of horizontal axial wind turbines using Bioinspired

Nemirini, Tshamano (2021-01-31)

Small-scale wind turbines were not considered viable in the past due to their poor efficiencies, mainly because of their aerodynamic effects around the irfoil shape. Recently researchers have renewed interest in enhancing ...
Multi-input multi-output proportional integral derivative controller tuning based on improved particle swarm optimization

Nkwanyana, Thamsanqa Bongani (2021-01)

The PID controller is regarded as a dependable and reliable controller for process industry systems. Many researchers have devoted time and attention to PID controller tuning and they all agree that PID controllers are ...
Evaluating of DNP3 protocol over serial eastern operating unit substations and improving SCADA performance

Njova, Dion (2021-07-14)

Supervisory Control and Data Acquisition (SCADA) is a critical part of monitoring and controlling of the electrical substation. The aim of this dissertation is to investigate the performance of the Distributed Network ...
Use of recovery-by-size data from batch testing in estimating the performance of continuous flotation operations

Khumalo, Robert Bheki (2021-05)

The work title ‘Use of Recovery-by-Size Data from Batch Testing in Estimating the Performance of Continuous Flotation Operations’ seeks to validate available theories against recovery-by-size batch flotation data and ...
Investigation of hierarchical deep neural network structure for facial expression recognition

Motembe, Dodi (2020-01)

Facial expression recognition (FER) is still a challenging concept, and machines struggle to comprehend effectively the dynamic shifts in facial expressions of human emotions. The existing systems, which have proven to ...
Investigation of rockfall and slope instability with advanced geotechnical methods and ASTER images

Sengani, Fhatuwani (2021-03)

The objective of this thesis was to identify the mechanisms associated with the recurrence of rock-slope instability along the R518 and R523 roads in Limpopo. Advanced geotechnical methods and ASTER imagery were used for ...
Access control with automated on duty notification tool in air traffic services

Ntombela, Nkululeko; Umenne, Patrice (IEEE, 2020-08-04)

This project provides a solution that alerts management if an Air Traffic Service Unit (ATSU) tower is unmanned during operational hours. The project makes provision for an access control with an automated on duty notification ...
Micron sized constrictions fabricated using the femtosecond laser technique on YBCO thin films.

Umenne, Patrice (Springer, 2020-05-08)

In this paper, I report on the fabrication of micron-sized constrictions in YBCO thin films using the femtosecond laser technique. The constrictions are S-shaped superconducting weak links fabricated on YBCO thin films. ...

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