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University of Johannesburg Institutional Repository
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  • Dynamic modelling of an induced draft fan

    M.Ing. The performance and reliability of induced draft fans are of ever growing concarn in industry, especially in the power generation industry. The reliability and plant efficiency depend on the design conditions of all plant components. Induced draft fans handle high temperature flyash-laden flue gas, and are often plagued by mass-flow deficiencies and excessive vibration in fossil fuel powerplants [1]. In this research an existing induced-draft fan is analysed to investigate the occur...

    Structural classification of granular base pavements using measured deflection bowl parameters

    M.Ing. (Civil Engineering) The: structural classification of granular base pavements by means of resilient deflection bowl parameters measured by the Impulse Deflection Meter and application of measured deflections at network level were investigated. The Investigation consisted of a mechanistic analysis and an analysis of observed field results. Curves for structural classification of granular base pavements obtained by regression are presented. The Curves obtained by the analysis of field...

    The role of the school governing body in managing fundraising for public primary schools in disadvantaged communities.

    M.Ed. Since the first democratic election in South Africa in 1994, there has been significant change and development in all spheres of our lives. Democracy and the implementation of a new Constitution have brought about changes, even in the education system. The democratic system of education is characterised by the new Act that is, the South African Schools Act (SASA) No. 84 of 1996 (RSA, 1996b). This Act acknowledges the importance of parents as stakeholders in the school governing bodie...

    Paleomagnetism of selected neoarchean-paleoproterozoic cover sequences on the Kaapvaal Craton and implications for Vaalbara

    The Kaapvaal craton of southern Africa and the Pilbara craton of Western Australia, two of the best-preserved Archean cratons in the world, are covered by remarkably similar early Precambrian cover sequences. This has led to the proposal of the so-called Vaalbara hypothesis, which promotes the existence of the two cratons as a single crustal entity, and possibly, Earth’s oldest assembled continent in Neoarchean-early Paleoproterozoic times. Previous studies have failed to prove the existence ...

    Historiese oorsig en kritiese evaluering van die genus Paraxonchium Krall, 1958, en beskrywing van 'n nuwe spesie (Dorylaimida)

    M.Sc. (Nematology) An unknown dorylaim species was found at 'The Willows', Port Elizabeth. This species show affinities with the genus Paraxonchinin Krall, 1958, especially on account of the exceptionally narrow anterior end, but does not fit the general description of the genus. A historical review is given of the genus Paraxonchium, and the taxonomic position of the nominal species evaluated at the hand of the original description ...
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