Now showing items 1-10 of 33
Implementation of a proprietary CAD graphics subsystem using the GKS standard interface.
This project involved porting a Graphical Software Package (GSP) from the proprietary IDS-BO Gerber CAD system onto a more modern computer that would allow student access for further study and development. Because of the ...
Combustion stress in compression-ignition engines.
South Africa produces alternative fuels from a number of different sources. The properties of a fuel are known to affect the nature of combustion in compression-ignition engines significantly, and have occasionally ...
Modelling and analysis of turbogenerators in single machine and multi- machine subsynchronous resonance studies.
Subsynchronous Resonance (SSR) is a condition which occurs when turbogenerators are connected to series capacitively compensated transmission systems and it can cause large scale damage to the turbogenerators. The ...
Numerical alogrithms for PWM modulators.
The development of a simple efficient Pulse Width Modulation (PWM) modulator has been a goal for many research workers. In general three techniques have been used, namely; the analogue triangular wave technique; the use ...
Gas residence time testing and model fitting : a study of gas-solids contacting in fluidised beds.
This work is concerned with the effect of vessel geometry on the hydrodynamics of fluidisation of a bed of milled iron oxide. The effect of going from a cold model representative of a typical pilot plant reactor to one ...
Design and operation of a multistage pressurized fluidized bed combuster.
A three-stage Pressurized Fluidized Bed Combustor (PFBC) of principal dimensions, O,4Sm internal diameter by4m high was designed and fabricated to burn South African coals, with particular reference to coals unsuitable ...
A proportional timing generator for measuring intermodulation product distortion on television transposers.
Broadcasting authorities presently measure intermodulation distortion by applying a three tone simulation of a composite video and sound signal to the transposer and then measuring the relative amplitude of the major ...
The Design of high-voltage planar transistors with specific reference to the collector region.
The thesis represents a major contribution to the understanding of the design and fabrication of high-voltage planar silicon bipolar transistors, and reports on the original research carried out and the special methods ...
A high resolution model for multiple source dispersion of air pollutants under complex atmospheric structure.
No abstract available.
An adaptive protocol for use over meteor scatter channels.
Modem technology has revived interest in the once popular area of meteor scatter communications. Meteor scatter systems offer reliable communications in the 500 to 2000 km range all day, every day. Recent advances in ...