School of Engineering: Recent submissions

Now showing items 81-100 of 397

Ethylene activity and Fischer-Tropsch synthesis: new perspectives in reaction mechanism

Zhang, Yusheng (2021-01)

With the aim of studying the reactivity of ethylene and consequently understanding and elucidating aspects of the Fischer-Tropsch (FT) reaction mechanism, a large number of experiments were conducted using feed gas ...
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 ...
Review of molten carbonate-based direct carbon fuel cells

Cui, Can Li, Shuangbin Gong, Junyi Wei, Keyan Hou, Xiangjun Jiang, Cairong Yao, Yali Ma, Jianjun (2021-07-02)

Abstract Direct carbon fuel cell (DCFC) is a promising technology with high energy efficiency and abundant fuel. To date, a variety of DCFC configurations have been investigated, with molten hydroxide, molten ...
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 ...
Improvement of vibration behaviour of small-scale wind turbine blade

Babawarun, Tolulope (2020-02)

Externally applied loads from high winds or impacts may cause structural damage to the wind-turbine blade, and this may further affect the aerodynamic performance of the blade. Wind-turbine blades experience high vibration ...
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 ...
A theoretical analysis of the implications of comminution practices on open pit mine planning

Thage, Rorisang Gomolemo (2020-12)

The implications of comminution practices on the planning of a typical open pit mine was investigated in this study by means of computer simulation. The objective was to assess the effects of mining costs as well as ...
Preparation of N-doped porous carbon materials and their supercapacitator performance

Zong, Shuang (2021-01)

Supercapacitor is the best potential candidate of the energy storage system due to the superior charge or discharge efficiency, high power density (>10 kW kg-1), and long cycling life. Porous carbon materials as the ...
A design and development of iron ore Fischer Tropsch catalyst

Mubenesha, Samuel (2020-03)

The global community has accepted Fischer Tropsch synthesis as one of the sustainable pathways to transportation fuels and chemicals due to the ever-depleting reserves of fossil fuels and its detrimental impact on the ...
Particle image velocimetry measurements of blood flow in aneurysms using 3D printed flow phantoms

Tshimanga, Ilunga Jeanmark (2019-11)

Cardiovascular diseases (CVD) remain one of the leading causes of deaths worldwide. The formation and presence of aneurysm is a very important question in the study of this CVDs. An aneurysm is a balloon-like bulge on a ...
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 ...
Simultaneous electrochemical sensing of dihydroxy benzene isomers at cost-effective allura red polymeric film modified glassy carbon electrode

Ganesh, Pattan-Siddappa Shimoga, Ganesh Lee, Seok-Han Kim, Sang-Youn Ebenso, Eno E (2021-04-20)

Abstract Background A simple and simultaneous electrochemical sensing platform was fabricated by electropolymerization of allura red on glassy carbon electrode (GCE) for ...
Mixed integer nonlinear optimization framework applied to a platinum group metals flotation circuit

Mabotha, Eric Tswaledi (2020-08)

This study described an alternative approach for flotation circuit optimization using a mathematical programming technique. Mathematical formulation resulted in mixed integer nonlinear programming problem. Experimental ...
Plant active products and emerging interventions in water potabilisation: disinfection and multi-drug resistant pathogen treatment

Adeeyo, Adeyemi O Edokpayi, Joshua N Alabi, Mercy A Msagati, Titus A M Odiyo, John O (2021-03-24)

Abstract Background This review aims at establishing the emerging applications of phytobiotics in water treatment and disinfection. ...
Characteristics of Wood Ash Cement Mortar Incorporating Green-Synthesized Nano-TiO2

Ikotun, Bolanle D Raheem, Akeem A (2021-03-17)

Abstract This paper presents the findings of an investigation into the influence of green-synthesized nano-TiO2 on the characteristics of wood ash (WA) cement mortar. Mortar specimens were prepared by partial ...
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. ...
AFM analysis of micron and sub-micron sized bridges fabricated using the femtosecond laser on YBCO thin films.

Umenne, Patrice (MDPI micromachines, 2020-12-08)

The project arose as a result of the need to use the femtosecond laser to fabricate sub-micron and Nano-sized bridges that could be analyzed for the Josephson effect. The femtosecond laser has a low pulse duration of 130 ...

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