Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 76 for “"Electrical and Electronic Engineering"”.
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Unstructured staggered mesh discretisation methods for computational fluid dynamics
There are many branches of engineering science that require solution of fluid flow problems. Some of these examples are aerodynamics of aircraft and vehicles, hydrodynamics of ships, electrical and electronic engineering and many others. Some of these flows may involve complex geometrical shapes …
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An investigation into the design of a satellite based stereo imaging sensor and the use of automatic image matching in the production of digital elevation models
… of a micro-satellite based stereo imaging sensor and the automatic matching of digital stereo images for automatic cartography applications. The two problems are related; they are both components of a stereo vision system. The research was initially motivated by the decision of the Department of …
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Textural features for fingerprint liveness detection
… during these three years concerned biometrics and in particular the Fingerprint Liveness Detection (FLD), namely the recognition of fake fingerprints. Fingerprints spoofing is a topical issue as evidenced by the release of the latest iPhone and Samsung Galaxy models with an embedded fingerprint …
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The implementation of a LAN
… a Local Area Network (LAN) for the Department of Electrical and Electronic Engineering at the University of Cape Town. Motivation for this project was as a result of the ever increasing demands placed on the department's micro-computer training facilities by larger student intakes. The original …
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Contribuciones a la definición del modelo de objetos de comunicación y perfiles de aplicación de los servicios de acceso normalizado a la información en el dominio relativo a dispositivos médicos en cuidados intensivos
… a nivel internacional es ISO (International Standards Organization), pero existen otros a nivel regional CEN (Comité Europeo de Normalización) y nacional AENOR (Asociación Española de Normalización). Existen también organizaciones que contribuyen al desarrollo de normas IEEE (Institute of …
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Transient response of temperature sensors
… value in 40· seconds. Cancelling this response and iritroducing one of time constant 1 second enables the 2 % band to be reached in just 5 seconds. It was also possible to correct transient responses made up of two exponentials to speed them up. Recursive estimators, which is a technique derived …
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Placement and routing for reconfigurable systems.
… to novelty of this thesis is in new placement and routing techniques resulting in minimising reconfiguration latency of reconfigurable systems. This presents a part of design process concerned with positioning and connecting design blocks in a logic gate array. The aim of the research is to …
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Behavioural simulation of mixed analogue/digital circuits.
… have made possible the implementation of complex electronic systems on a single chip. This often requires both analogue and digital signal processing. It is essential to simulate such IC's during the design process to detect errors at an early stage. Unfortunately, the simulators that are …
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Simulation and analytical performance studies of generic atm switch fabrics.
… new services such as video phone become possible and economically viable but their deployment is hampered by the inability of the present networks to carry them. The long term vision is to have a single network able to carry all present and future services. Asynchronous Transfer Mode, ATM, is the …
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Development and in-vitro evaluation of a potentially implantable fibre-optic glucose sensor probe
… the brain quickly runs out of fuel causing coma and death. Because of this, a means to constantly monitor blood glucose levels has been sought for the last two decades. With such a device, diabetics could judge the correct amount of insulin to inject and be warned of low blood glucose levels. …
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Application of object-orientation to HDL-based designs
… design complexity. new development techniques and methodologies have been researched and applied. The early 90's have witnessed the uptake of a new kind of design methodology based on Hardware Description Languages (HDL). This methodology has helped to master the possibilities inherent in our …
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Optical waveguide analysis using transmission lines
… been used as a key medium for telecommunication and networking for more than two decades because in principle they offer sufficient transmission capacity, reaching total rates as high as Tbits/s per fibre. Critical fibre properties such as mode field profiles, single-mode propagation conditions …
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Analytical and simulation performance modelling of indoor infrared wireless data communications protocols
… radio frequencies (RF) for low cost, low power and short-range indoor wireless data communications. Low-cost optoelectronic components with an unregulated IR spectrum provide the potential for very high-speed wireless communication with good security. However IR links have a limited range and …
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Link layer protocol performance of indoor infrared wireless communications
The increasing deployment of portable computers and mobile devices leads to an increasing demand for wireless connections. Infrared presentsseveral advantagesover radio for indoor wireless connectivity but infrared link quality is affected by ambient infrared noise and by low power transmission …
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Optimisation of multiplier-less FIR filter design techniques
… filtering structures, better throughput rates and higher speed. These characteristics are very desirable in many DSP systems. This thesis concentrates on the design of digital filters with power-of-two coefficients that result in simplified filtering structures. Two distinct classesof ML FIR …
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Performance modelling and enhancement of wireless communication protocols
… play a key role in the data communications and networking areas, having witnessed significant research and development. WLANs are extremely popular being almost everywhere including business,office and home deployments.In order to deal with the modem Wireless connectivity needs,the Institute …
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On the feasibility of the communications in the TVWS spectrum analysis and coexistence issue
… Television (DTT) broadcasting systems and digital switchover plans have driven a thorough review of TV spectrum exploitation. The resulting unused channels within this band are called “TV white spaces” (TVWS). Even after the redistribution of the digital TV channels, the problem of an …
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Implementation of a digital signal processing (DSP) boost inverter for fuel cell energy generation
This thesis investigates and implements the use of a microprocessor called Digital Signal Processors (DSP) as a controller in the design of a low power inverter used in Fuel Cell energy source. The fuel cell used in this research is a Heliocentris “Constructor”, a 50W proton exchange membrane (PEM) …
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Development of control techniques for direct AC‐AC matrix converter fed multiphase multi‐motor drive system
… such as paper mills, locomotive traction, oil and gas, mining and machine tools, which require high performance control of more than one electric motor simultaneously. When more than one electric motors are employed in an electric drive, it is called, ‘multi‐motor drive’. These multi‐motor …
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Implementation of the IEC61850 international protocol for accurate fault location in overhead transmission lines
… Systems (SAS). Free marketing, deregulation and competition has brought about greater restrictive requirements to produce reliable, continuous and good-quality power supply, without a significant increase in the cost of delivery. For this reason, engineers ever since the development of the …
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