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Faculty of Engineering
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Department of Electrical and Electronic Engineering
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Doctoral Degrees (Electrical and Electronic Engineering)

Doctoral Degrees (Electrical and Electronic Engineering)

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Recent Submissions

Direct piston displacement control of free-piston Stirling engines

Strauss, Johannes Matthias (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: Control of beta-type free-piston Stirling engines has been the topic of research and development for many years. In this dissertation, an alternative approach to free-piston Stirling engine control, ...
Cardiac MRI segmentation with conditional random fields

Dreijer, Janto Frederick (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: This dissertation considers automatic segmentation of the left cardiac ventricle in short axis magnetic resonance images. The presence of papillary muscles near the endocardium border makes simple ...
A superconducting software defined radio frontend with application to the Square Kilometre Array

Volkmann, Mark Hans (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: Superconducting electronics can make the Square Kilometre Array (SKA) a better instrument. The largest radio telescope in the world will consist of several arrays, the largest of which, consisting of ...
Development and optimisation of a zinc oxide nanowire nanogenerator

Van den Heever, Thomas Stanley (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: This study developed and optimised zinc oxide (ZnO) nanowire-based nanogenerator. The nanogenerator works on the piezoelectric effect that is, a mechanical force is converted to an electrical voltage. ...
A comparative analysis of the performance and deployment overhead of parallelized Finite Difference Time Domain (FDTD) algorithms on a selection of high performance multiprocessor computing systems

Ilgner, Robert Georg (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: The parallel FDTD method as used in computational electromagnetics is implemented on a variety of different high performance computing platforms. These parallel FDTD implementations have regularly been ...
Improving the direction-dependent gain calibration of reflector antenna radio telescopes

Young, Andre (Stellenbosch : Stellenbosch University, 2013-12)

ENGLISH ABSTRACT: Utilising future radio interferometer arrays, such as the Square Kilometre Array (SKA), to their full potential will require calibrating for various direction- dependent effects, including the radiation ...
Design of the dual-shaped triple layer pillbox antenna

Baard, Charl Wynand (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: The triple layer pillbox antenna is an antenna topology well suited for use as a stackable "plank" element in radar applications. Its suitability arises from the folding which makes it compact, and from ...
A state management and persistency architecture for peer-to-peer massively multi-user virtual environments

Gilmore, John Sebastian (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: Recently, there has been significant research focus on Peer-to-Peer (P2P) Massively Multi-user Virtual Environments (MMVEs). A number of architectures have been presented in the literature to implement ...
The method of manufactured solutions for the verification of computational electromagnetic codes

Marchand, Renier Gustav (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: In this work the Method of Manufactured Solutions (MMS) is introduced for the code veri cation of full-wave frequency dependent electromagnetic computational software. At rst the method is sketched ...
Development of a novel air-cored permanent magnet linear generator for direct drive ocean wave energy converters

Vermaak, Rieghard (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: In hierdie tesis word ’n nuwe lug kern permanent magnet (PM) lineêre generator (LG) vir toepassing tot direk aangedrewe (DA) oseaan golf energie omsetters (GEO) ontwikkel. Die nuwe LG word ontwikkel vanaf ...
Parallel algorithms for electromagnetic moment method formulations

Davidson, David Bruce (Stellenbosch : Stellenbosch University, 1991-12)

ENGLISH ABSTRACT: This dissertation investigates the moment method solution of electromagnetic radiation and scattering problems using parallel computers. In particular, electromagnetically large problems with arbitrary ...
An experimental study of artificial isotropic chiral media at microwave frequencies

Smith, Anthonie Gronum (Stellenbosch : Stellenbosch University, 1994-12)

ENGLISH ABSTRACT: An artificial chiral medium can be made by embedding metal helices (chiral or handed structures) with random orientation inside au achiral hnst medium. The electromagnetic behaviour of such artificial ...
A computational architecture for real-time systems

Mostert, Sias (Stellenbosch : Stellenbosch University, 2000-12)

ENGLISH ABSTRACT: The engineering of dependable real-time systems for mission critical applications is a resource intensive and error prone process. Achieving dependability requires a general consensus on the correctness ...
Empirical state space modelling with application in online diagnosis of multivariate non-linear dynamic systems

Barnard, Jakobus Petrus (Stellenbosch : Stellenbosch University, 1999-12)

ENGLISH ABSTRACT: System identification has been sufficiently formalized for linear systems, but not for empirical identification of non-linear, multivariate dynamic systems. Therefore this dissertation formalizes and ...
The non-destructive measurement of the radio frequency properties of hard rock borehole cores

Rutschlin, Marc (Stellenbosch : Stellenbosch University, 2005)

ENGLISH ABSTRACT: The effective use of borehole radar in geophysical exploration requires accurate knowledge of the dielectric properties of the geological system in which it is employed. The attenuation and propagation ...
Analysis and synthesis algorithms for the electric screen Jauman electromagnetic wave absorber

Du Toit, Leendert Johannes (Stellenbosch : Stellenbosch University, 1993-11)

ENGLISH ABSTRACT: An extensive literature study revealed numerous Jauman absorber examples with reasonable absorption properties. Unfortunately, tractable and detailed design techniques were found to be scarce, and often ...
Analysis of a radial flux-air-cored permanent magnet machine with a double-sided rotor and non overlapping windings

Randewijk, Peter-Jan (Stellenbosch : Stellenbosch University, 2012-03)

ENGLISH ABSTRACT: In this dissertation a new type of electrical machine, a Radial Flux Air-Cored Permanent Magnet machine with a Double-sided Rotor and utilising concentrated, non-overlapping windings, is proposed. The ...
Power-line sparking noise characterisation in the SKA environment

Langat, Philip Kibet (Stellenbosch : Stellenbosch University, 2011-12)

ENGLISH ABSTRACT: The Square Kilometre Array (SKA) and its demonstrator MeerKAT are being designed to operate over a wide frequency range and are expected to achieve greater sensitivity and resolution than existing telescopes. ...
Natural balancing of multicell converters

Wilkinson, Richardt Howard (Stellenbosch : University of Stellenbosch, 2004-04)

ENGLISH ABSTRACT: Multilevel converters were developed as a result of a growing need for higher power converters. This dissertation addresses a specific multilevel topology called the multicell topology. A problem associated ...
A tool kit for the design of superconducting programmable gate arrays

Fourie, Coenrad Johann (Stellenbosch : University of Stellenbosch, 2004-12)

ENGLISH ABSTRACT: The development of a tool kit for the design of superconducting programmable gate arrays (SPGAs) is discussed. A circuit optimizer using genetic algorithms is developed and evaluated. Techniques and a ...

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