Rhodes eResearch Repository
(3.344 recursos)
Repository of the academic and research output of the Rhodes University community.
Mostrando recursos 1 - 20 de 483
1.
Novel approaches to the monitoring of computer networks - Halse, Guy Antony
Traditional network monitoring techniques suffer from a number of limitations. They are usually designed to solve the most general case, and as a result often fall short of expectation. This project sets out to provide the network administrator with a set of alternative tools to solve specific, but common, problems. It uses the network at Rhodes University as a case study and addresses a number of issues that arise on this network.
Four problematic areas are identified within this network: the automatic determination of network topology and layout, the tracking of network growth, the determination of the physical and logical locations...
2.
Attitudes of isiXhosa-speaking students at the University of Fort Hare towards the use if isiXhosa as a language of learning and teaching (LOLT) - Dalvit, Lorenzo
The present work presents and discusses the results of a survey of a sample of isiXhosa-speaking students at the University of Fort Hare (Alice campus) and their attitudes towards the possible introduction of isiXhosa as a medium of instruction at this institution. More specifically, the research focuses on, among other things, the students attitudes towards English and isiXhosa and their opinions and beliefs about the introduction of dual-mediumship and its possible consequences. The survey methods used are a questionnaire survey as well as follow-up interviews, supplemented by on-campus observation. The results are first analysed as a whole, and then split...
3.
An object relational psychoanalysis of selected Tennessee Williams play texts - Tosio, Paul
Tennessee Williams is a playwright of great psychological depth. This thesis probes some of the complexities of his work through the use of Object Relational Psychoanalysis, specifically employing the theories of Melanie Klein, W.R.D. Fairbairn and Donald Winnicott.
The Glass Menagerie, A Streetcar Named Desire, Cat On A Hot Tin Roof and The Night of The Iguana are analysed from this theoretical stance. All of these plays display great perceptiveness into the human condition, accurately portraying many psychological relational themes.
Certain Object Relational themes become very apparent in these analyses. These themes include, Dependency (especially in The Glass Menagerie), Reparation (particularly in...
4.
The ecophysiology of selected coastal dune pioneer plants of the Eastern Cape - Ripley, Bradford Sherman
Understanding the mechanisms and adaptations that allow only certain species to thrive in the potentially stressful foredune environment requires a knowledge of the basic ecophysiology of foredune species. Ecophysiological measurements were conducted on the foredune pioneer species Arctotheca populifolia (Berg.) Norl., Ipomoea pes-caprae(L.) R. Br. and Scaevola plumieri (L.) Vahl. and showed significant differences among species with respect to the physiology associated with biomass production, water and nutrient relations.
Differences related to CO2 assimilation included differences in photosynthetic and respiratory rates, susceptibility to light stress and leaf and stem non-structural carbohydrate concentrations. These resulted in differences in primary production rates...
5.
Framing the other : representations of Africa in The Japan Times/Online between January and December 2000 : a case study - Ngoro, Blackman Rodrick
The aim of this study is to find out, against the news genre norms, how representations of particular regions are produced in the structure of newspaper reporting in the foreign news sub-genre. The study focuses on news reports concerning Africa, or African countries, in one Tokyo-based newspaper: The Japan Times/Online. The study is theoretically informed by Cultural Studies a field of study concerned with the study of ideology and power in discourse and investigates how Africa and African countries are represented as other than developed countries.
This is a textual study that focuses on the production moment using Critical...
6.
Where the global meets the local : South African youth and their experience of global media - Strelitz, Larry Nathan
Within the context of debates concerning the impact of global media on local youth, this study explores how a sample of South African youth responds to texts which were produced internationally, but distributed locally. Recognising the profound rootedness of media consumption in everyday life, the research examines the way these youth, differentially embedded in the South African economic and ideological formation, use these texts as part of their ongoing attempts to make sense of their lives. The study rejects the 'either/or' formulations that often accompany competing structuralist and culturalist approaches to text/audience relationships. Instead, using a combination of quantitative and...
7.
A development and management framework for a new Octopus vulgaris fishery in South Africa - Oosthuizen, Ané
A new policy incorporating an operational protocol was developed for the establishment of new fisheries in South Africa. The common octopus, Octopus vulgaris was used as a candidate species for the project. The operational protocol consisted of a three-phased development framework, namely information gathering (Phase 0), an experimental fishery (Phase 1) and the final implementation of a commercial fishery (Phase 2). The present study focussed on phase 0 of this theoretical framework and protocol and was implemented by using a proposed octopus pot fishery in South Africa as a case study. Phase 0 included a desktop study, information gathering in...
8.
The potential of abalone stock enhancement in the Eastern Cape Province of South Africa - Godfrey, Brian Peter
The largest abalone in South Africa, the perlemoen, Haliotis midae, occurs along approximately two-thirds of the countrys coastline, but has only been the target of an extensive commercial fishery in the south-western part of South Africa. Large-scale illegal fishing has however proliferated throughout its entire range over the last 1015 years, which has had serious effects on stock abundance and once productive populations are facing economic collapse. Abalone stock enhancement has been put forward as an addition or alternative to traditional fisheries management practices, which can potentially rehabilitate overfished abalone populations and enhance natural production. The aim of this project...
9.
A neural network based ionospheric model for the bottomside electron density profile over Grahamstown, South Africa - McKinnell, Lee-Anne
This thesis describes the development and application of a neural network based ionospheric model for the bottomside electron density profile over Grahamstown, South Africa. All available ionospheric data from the archives of the Grahamstown (33.32ºS, 26.50ºE) ionospheric station were used for training neural networks (NNs) to predict the parameters required to produce the final profile. Inputs to the model, called the LAM model, are day number, hour, and measures of solar and magnetic activity. The output is a mathematical description of the bottomside electron density profile for that particular input set. The two main ionospheric layers, the E and F...
10.
Dynamics of early stage fishes associated with selected warm temperate estuaries in South Africa - Strydom, Nadine Amelia
Early stage fishes, namely larvae and early juveniles, were collected from 12 estuaries and associated habitats in the warm temperate region of South Africa between July 1998 and December 2000. This study served to provide new information and expand on existing knowledge of early stage fish assemblages associated with various types of Eastern Cape estuaries. A total of 65 536 predominantly postflexion fish larvae were collected. Together with early juveniles, taxa comprised 72 species from 25 teleost fish families. Surf zones associated with two intermittently open estuaries showed that estuary-dependent marine species predominated in this zone. Early stage fishes responded...
11.
South African small business growth through interfirm linkages - Toomey, David Colbert
Economic stagnation in sub-Saharan Africa since 1970 is well documented. While the causes are varied, the paradigm of nationalistic state-led economic development has changed. Economic development occurs in a global marketplace. Manufacturing has shifted from developed to less developed countries, an opportunity that was seized in Asia and Latin America. South Africas labour, unskilled and costly by world standards, is at a disadvantage as an agile and competitive world market seeks skilled labour at the lowest cost.
South Africas Gear economic policy suggests that 300 000 new jobs need to be created annually until 2004 in order to reduce...
12.
The 2326 MHz radio continuum emission of the Milky Way - Jonas, Justin Leonard
The Rhodes/HartRAO SKYMAP survey is the highest frequency (2326 MHz) and highest resolution (20 arcmin) large-area pencil-beam survey of the celestial radio continuum emission. The survey covers 67 % of the entire sky and is one of only two radio continuum surveys that cover the southern sky. These attributes make the survey eminently suitable for studying the extended radio continuum emission from the Milky Way. This thesis describes the methodology used to produce the SKYMAP survey map and presents an analysis of the galactic radio continuum emission.
Mountfort (1989, PhD thesis, Rhodes University) designed and implemented the original SKYMAP observing...
13.
The life history of selected coastal foredune species of South Africa - Knevel, Irma Cornelia
South African dune fields are severely threatened by human expansion and in the long run the stabilisation of many dunes will be necessary. The alien grass Ammophila arenaria is the most important drift sand stabiliser at present in South Africa. Although not invasive, the current impact of A. arenaria on the dune systems of South Africa is considerable, and thus the stabilising benefit of the grass seemed to may be outweighed by its negative consequences. It is therefore preferable to use indigenous sand stabilising species. In order to define guidelines for the application of indigenous plants for stabilisation, their autecology...
14.
An analysis of the trawl and longline fisheries for Merluccius capensis off the west coast of South Africa - Fairweather, Tracey Pamela
The South African hake resource faces divergent fishing pressures and management issues. Although the resource consists of two species, management was simplified because the resource was only subject to trawl effort and because of the similarity in population parameters, single species assessment models could be adopted. The impact of trawling on the stock is considered to be well understood and the resource has shown recovery since exclusion of foreign vessels. The 1990s were punctuated by major political change and the need for transformation has resulted in an expansion of the number of fishing rights holders. Longlining has been reintroduced and...
15.
The pursuit of paternal custody - Pieterse, Johanna Tyziena
Issues concerning children may be the most intense and emotive areas of divorce and can lead to spectacular legal battles. Social work practice revealed that it is often the father who leaves the court, stripped of his fatherhood by a court order that only grants him limited access to his own children. Some divorced fathers disengage from their childrens lives but there is documented evidence of South African fathers who desire continuity in their relationships with their children after divorce. An interest in these fathers prompted this study. Fathers who challenged maternal custody were selected since it was assumed that...
16.
The vegetation potential of natural rangelands in the mid-Fish River valley, Eastern Cape, South Africa : towards a sustainable and acceptable management system - Birch, Natalie Vivienne Evans
Desertification is the diminution or destruction of the biological potential of land, and can lead ultimately to desert-like conditions. The vegetation of southern Africa is claimed to have altered over the past 100 years and much of the change is attributed to pastoral practice. In recent years however there has been much debate around the issue of the deterioration and loss of productivity of the natural rangelands, specifically those under communal management. It is one thing to claim that the vegetation has changed but quite another to produce data and analyses to show this unequivocally. Furthermore it is generally difficult...
17.
Language and value: the place of evaluation in linguistic theory - Kilpert, Diana
It is a central claim of modern linguistic theory that linguists do not prescribe, but describe language as it is, without pronouncing on correctness or judging one variety better than another. This attempt to exclude evaluation is motivated by a desire to be 'politically correct', which hinders objective analysis of language, and by an ill-advised imitation of the natural sciences, which obstructs the discipline's progress towards becoming a science in its own right. It involves linguists, as users of a valued variety, in self-deception and disingenuousness, distances them from the concerns of the ordinary language user, and betrays a failure...
18.
Effects of sustained elevated CO2 concentration and
Nitrogen nutrition on wheat (Triticum aestivum L. cv
Gamtoos) - Kgope, Barney Stephen
There is consensus that high CO2 results in enhanced growth and yield for most crop plants. However, most of these studies were carried out in the presence of adequate nutrients, which is also the case in agricultural systems (managed ecosystems). About 20% of the earths land mass have sufficiently low levels of nutrients to cause some kind of stress to plants. On the other hand, elevated [CO2] decreases foliar nutrient elements in plants and as a result partitioning of certain nutrient elements in plants is altered. Little data is available on the partitioning of most nutrient elements in plants, and...
19.
The utilisation of Azolla filiculoides Lam. as a
biofertiliser under dryland conditions - Kiguli, Lillian Nakibuuka
The response of wheat to soil fertilised with varying quantities of the water fern Azolla filiculoides was investigated. Experiments were conducted to differentiate between the effects of increased soil mineral status and water status. In the preliminary investigation, experiments were carried out in the greenhouse using potted wheat grown in sand with varying proportions of A. filiculoides that had been subjected tovarious pre-treatments. The pre-treatments were fresh, dry and heated A. filiculoides applied at 20%, 50% and 80% volume per 3000 ml. There were significant differences in the measured growth parameters between the plants grown in the various treatments. In...
20.
Observations of selective feeding of the aphid, Sitobion
yakini (eastop) on leaf blades of barley (Hordeum vulgare
L) - Matsiliza, Babalwa
Penetration of leaves of barley (Hordeum vulgare L.) plants grown under normal conditions and those exposed to physiological stress, by the aphid, Sitobion yakini was investigated using light and electron microscope techniques. This was carried out to determine if there was evidence of preferential feeding on either thin- or thick-walled sieve tubes in the barley leaf.
Under both stress and non-stress conditions, preliminary results of an electron microscope investigation showed that penetration of the epidermis and mesophyll was largely intercellular, becoming partly intercellular and in part intracellular inside the vascular bundle. A total of 317 stylets and stylet tracks were...
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