Synchronisation of breeding in populations of the brown mussel Perna perna on the South Coast of South Africa
- Authors: Ndzipa, Victoria
- Date: 2013-05-28
- Subjects: Mussels -- South Africa , Perna -- South Africa , Perna -- Breeding
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5830 , http://hdl.handle.net/10962/d1007857 , Mussels -- South Africa , Perna -- South Africa , Perna -- Breeding
- Description: The general biology and seasonality of breeding of intertidal populations of the brown mussel Perna perna in South Africa are reasonably well known, but we have little information on variability either within or among populations. Synchronous spawning offers adaptive advantages to externally breeding animals. Firstly, it enhances fertilization rates and therefore the species' reproductive fitness. Secondly, spawning can also be timed to coincide with environmental conditions conducive to larval settlement and development. In addition, synchronisation of spawning will influence the synchrony of settlement. Synchronisation of larval settlement, in turn, has implications for popUlation biology, as highly pulsed settlement is likely to lead to density-dependant mortality of recruits and uncoupling of adult/recruit densities, while poorly synchronised settlement will not. Generally, sea temperature and food availability are considered the key factors underlying the initiation and the duration of the breeding cycle of mussels. However, there are proximate local cues that trigger the proliferation, maturation and release of gametes. In this study, the hypothesis tested is that factors that control food availability affect gonad development and so influence synchrony among populations. Much of the published work on spawning is based on observations of the presence of larvae in the plankton, or on settlement. A more reliable method correlates the sequence of gonad development throughout the year with changes in length-weight relationships, using histology. This study is also designed to investigate temporal differences in the timing of the breeding cycle between sheltered and exposed sites along the south coast of South Africa by histological analysis of the reproductive tissue (the gonad) and by dry weight/shell length regreSSIOns. To do this, these two techniques were applied to six mussel populations at three III ocalities that were separated on scales of about 10-20km. Within each locality, two study sites were .dentified. One was exposed to strong wave action and one was sheltered. A few hundred meters ;eparated these sites. The first technique used length-weight regressions as an indication of mussel ~ondition. Abrupt decreases in the dry body weight of a hypothetical standard animal were taken to indicate periods of spawning. Regressions were assessed for samples of 40 mussels taken from each site at intervals of 4 weeks over 13 months. The results were analysed using a 3-way ANCOV A, with dry weight as the dependent variable, shell length as a covariate, and site, exposure and month, as independent variables. The second approach used the more reliable and detailed method of assessing the annual reproductive cycle using histological sections of the gonad. Histological sections of gonads from thirty female mussels, sampled monthly from each site, were examined in the laboratory. Each gonad was categorized into one of six arbitrary developmental stages based on ovary morphology. Synchrony in spawning was examined by comparison of gonad developmental stages of individuals within and among populations. The data were analysed by 3-way nested ANOV A with mean gonad index for each population as the dependent variable, month as an independent variable and exposure nested in site. The results obtained from both techniques showed strong synchronisation among different popUlations, regardless of the scales at which they were separated. The data also indicated good synchrony within populations and, again among populations, regardless of the degree of exposure. The results also indicated that the gonad condition varied significantly at each site, exposure level and month. However, there were significant interactions among these three factors. This means that on a broader seasonal scale the six mussel populations were reasonably synchronised, but on finer monthly scales, there were temporal differences in duration of gametogenic events. The implication is that ovary development is cued by environmental factor(s) that operate on scales of at least 7-20 km rather than more localised events that may affect food availablity either through aggregation of food (local hydrography at different localities) or food delivery to the shore (degree of wave action at different sites.) , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Involuntary consent
- Authors: Futter, Dylan Brian
- Date: 2013-05-24
- Subjects: Ignorance (Theory of knowledge) Responsiblity Free will and determinism Theory (Philosophy) Social ethics Blame
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2742 , http://hdl.handle.net/10962/d1007846
- Description: In this dissertation I take exception with a widely held philosophical doctrine, according to which agents are only blameworthy for the bad actions they have chosen to bring about. My argument strategy is to present cases in which agents are blamed for involuntary actions that are not in any way connected to their culpable and voluntary choices. These failures correspond, I suggest, to occasions of culpable ignorance where agents have been negligent or careless. More specifically, I claim that violations of natural duties of respect and consideration, and certain acquired role-type duties, are blamed without any voluntary consent. If my examples are persuasive, then the point is reached where a normative principle of 'voluntary consent' does not in fact coincide with people's actual practices and 'considered judgements'. In the final sections of the dissertation, I argue against the plausibility of keeping the principle and revising our judgements. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Rugby : more than just a game : a study of the cumulative effects of mild head injuries on high school rugby players
- Authors: Giai-Coletti, Cristina
- Date: 2013-05-24
- Subjects: Head -- Wounds and injuries -- Complications Rugby football injuries Brain -- Concussion -- Complications Neuropsychological tests
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3175 , http://hdl.handle.net/10962/d1007809
- Description: The present study comprises part of an ongoing research study investigating the effects 0 f cumulative mild head injuries 0 n Rugby Union p layers. The aim 0 f t he study was to ascertain whether there are neuropsychological effects of cumulative mild head injuries sustained during the rugby-playing careers of senior schoolboy rugby players. Participants were top-level rugby players from high schools in Grahamstown and Cape Town (n = 79) and non-contact sport controls of top-level field hockey players from the same schools (n = 58). Group mean comparisons across a battery of neuropsychological tests were carried out between the Total Rugby versus the Total Field Hockey group, and the Rugby Forwards versus the Rugby Backs group. Comparisons between Total Rugby versus Total Field Hockey revealed impaired performance by the rugby players on two tests of visuoperceptual tracking, namely Digit Symbol Substitution and Trail Making Test (Part A). For Rugby Forwards versus Rugby Backs, there were no consistent differences to support the expectation that forwards would perform worse than backs. Forwards performed more poorly than backs on WMS Associate Learning Subtest - Hard (Delayed Recall), whereas backs performed more poorly than forwards on Digits Backwards. This suggests that some individuals in the cohort were starting to exhibit verbal memory deficit, albeit not clearly in association with forward positional play. Overall, results of the present study provide tentative support for the hypothesis that school level rugby players are more susceptible to the effects of cumulative concussive and sub-concussive head injuries than are non-contact sport controls. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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South African women's literature and the ecofeminist perspective
- Authors: Ewing, Maureen Colleen
- Date: 2013-05-24
- Subjects: Ecofeminism in literature Ecology in literature Nature in literature South African fiction -- History and criticism Smith, Pauline, 1883-1959 Schreiner, Olive, 1855-1920 Matthee, Dalene, 1938-2005 Poland, Marguerite
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2287 , http://hdl.handle.net/10962/d1007808
- Description: A social-constructionist ecofeminist perspective argues that patriarchal society separates the human (or culture) from nature, which causes a false assumption that humanity possesses the right, as a superior species, to dominate nature. This perspective integrates the domination of nature with social conflicts, including but not limited to racial discrimination, gender oppression, and class hierarchies. Understanding how these various forms of oppression interrelate forms the main goal of an ecofeminist perspective. Since the nature-culture, female-male, and whitenonwhite conflicts resonate and interlock throughout South Africa's history, socialconstructionist ecofeminism is an indispensable perspective for analysing South African literature. This thesis takes a social-constructionist ecofeminist approach and applies it to four women authors that write about South African society between the years 1860-1900. This thesis includes the following authors and their works: Olive Schreiner (1855-1920) and two of her novels, The Story of an African Farm (1883) and From Man to Man (published posthumously in 1927); Pauline Smith (1882-1959) and her novel The Beadle (1926); Dalene Matthee (1938- ) and three of her novels, Circles in a Forest (1984), Fiela's Child (1986), and The Mulberry Forest (1987); and Marguerite Poland (1950- ) and one of her novels, Shades (1993). This thesis investigates two women from the time period (Schreiner and Smith) and two women from a late twentieth century perspective (Matthee and Poland) and compares how they depict the natural environment, how they construct gender, and how they interpret class and race power struggles. This thesis concludes that the social-constructionist perspective offers unique insights into these four authors. Schreiner's novels reveal her concerns about gender and racial conflicts in South Africa and her understanding of the nature-culture dichotomy as sustained by Social Darwinism. Smith offers insights into the complex power structures in a rural Afrikaans society that keep women and nonwhite races silent. Matthee writes nature as an active participant in her novels; the social and ecological conflicts emphasise the transformation of the Knysna area. Poland explores the racial tensions, gender conflicts, and environmental concerns that preceded the South African War. Schreiner, Smith, Matthee, and Poland make up a small cross-section of South African literature, but they provide a basis for further discussing the ecofeminist perspective within a South African context. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Geotectonic controls on primary diamond deposits : a review of exploration criteria
- Authors: Hannon, Camille
- Date: 2013-05-23
- Subjects: Diamonds , Geology, Structural , Diamond deposits , Kimberlite
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5047 , http://hdl.handle.net/10962/d1007810 , Diamonds , Geology, Structural , Diamond deposits , Kimberlite
- Description: The origin of diamonds, their preservation and transport to the surface have been important issues over the last decades after the acknowledgement that diamonds are xenocrysts in the host kimberlites and after the discovery of new transport media such as lamproites. Different types of diamonds -E-type diamonds, P-type diamonds- and different types of hosts - Eclogites, Peridotites- have been distinguished. Each type corresponds to particular formation criteria. Ecogitic Diamonds are mostly related to subduction processes, whereas more uncertainties remain regarding the formation of Peridotitic Diamonds. Komatiite extraction and subduction of graphite-bearing serpentinites have been proposed as the more likely processes involved in their formation. A typical mantle signature for diamonds implies a thick, cool, reduced lithosphere. The keel-shape model is the most popular. Archaean cratons are therefore the most promising exploration target and area selection will expect to follow the Clifford's Rule. However, the evidence of cratonic areas hidden under younger formations · through seismic profiles and the discovery of diamond structurally trapped outside their stability field, have increased the potential of diamondiferous areas. Preservation of diamonds inside the lithosphere requires that the mantleroot remains insulated against excessive reheating and tectonic reworking. Mantle-root friendly and mantle-root destructive structures are distinguished. Small-size cratons are usually the most promising exploration targets. Transport of diamonds to the surface is dependant on' the same criteria of preservation. Only kimberlites and lamproites have been recognized as efficient transport media. Their ascent to the surface is conditioned by a multitude of parameters, amongst them the nature of the magma, the speed of ascent, the presence of pre-existing structures in the crust and the availability of ground water in the near-surface environment. The origin of kimberlite magma probably lies near the transition zone. Mixtures of depleted asthenospheric · sources and metasomatically enriched and possibly subducted materials are likely to be at the origin of the different kimberlite magmas. Kimberlite magmatism correlates generally in time with global tectonic events, triggered by either plume activity or by subduction processes, depending of the tectonic school of thought. Kimberlite alignments have been interpreted as hotspot tracks, and kimberlite magmas as volatile-rich melts issued from the remaining plume tail. The plume head produces flood-basalts in an adjacent "thinspot" of the lithosphere, generally on the edges of the cratons. Kimberlite and lamproite ascent to the surface are unconditionally influenced by regional structures. Rift structures, ring structures, transform faults, suture zones and deep-seated faults have been mentioned as controlling or accompanying features of kimberlite magmatism. Nearsurface emplacement constraints are better understood and the ultimate shape of the intrusion(s) depends on the nature of the country rocks, the availability of ground water and the near-surface faulting pattern. The recent discovery of "fissure" kimberlites is one of the more important breakthroughs of the last decade. With a better understanding of the processes involved in diamond formation, preservation and of kimberlite emplacement, major diamond discoveries have recently increased on all the continents. Successful diamond exploration requires today an integration of all geophysical, petrologic, geochemical and structural information available. The particular study of the northwestern Australian lamproite and kimberlite fields, the Brazilian kimberlites, the easternNorth American kimberlite fields, the Lac de Gras kimberlite field, the South African rich kimberlite provinces, and the Yakutian kimberlite fields provide concrete examples of the geotectonic controls on primary diamond deposits. Area selection criteria based on the previous models and examples, are expected to yield to many more discoveries in the coming years. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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The suspension of mastery and the desire for imaginary : applying Jacques Lacan's theory of the imaginary to the beholder/image dialectic as realised in selected paintings by Lucy Cobern and Gerhard Richter
- Authors: Cobern, Lucy Rebecca
- Date: 2013-05-21
- Subjects: Lacan, Jacques, 1901-1981 -- Criticism and interpretation Richter, Gerhard, 1932- -- Criticism and interpretation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3174 , http://hdl.handle.net/10962/d1007806
- Description: This dissertation seeks to explore the nature of the self/other, subject/object dialectic that can be found in Jacques Lacan's theory of the Minor Stage and his notion of Imaginary mastery, and how this relationship can be re-read in terms of a beholder/image relationship. What I seek to demonstrate in exploring the relationship between the beholder and the image is the staging of two opposing emotions, aggression and desire and the consequential tussle for mastery that arises from the self/other, and hence the beholder/image, dichotomy. I seek to explore the reasons why such a beholder/image relationship becomes ambivalent, due to veiled, obscured and fragmented images. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Versions of virginity : an exploration of university students' narrative accounts of first sexual experience
- Authors: Ebden, Tiffany
- Date: 2013-05-21
- Subjects: College students -- South Africa -- Sexual behavior Sexual intercourse -- Psychological aspects Virginity
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3170 , http://hdl.handle.net/10962/d1007797
- Description: The research assumes a narrative constructionist and feminist perspective in order to explore stories concerning men and women's first sexual experience. Such a metatheoretical stance is concerned with the ways that lives are constructed and storied through language. There is a concern for the myriad voices, both personal and social, that speaks through individuals' stories and for the manner in which these voices are represented. Three men and three women were interviewed to elicit narratives of first sexual experience. The analysis of interview transcripts tells first sexual experience as a rite of passage described in terms of certain mythic elements. That is, the experience of first sex concerns three stages. Firstly the individual is detached from the experience of sex while still a virgin. Secondly the experience itself is one that is ineffable and diffuse. Thirdly the individual must make sense of the experience. Participants' experience could be characterised as containing elements of demonic, heavenly or earthly myths about sexual relationships: demonic elements concerned the base , physical and painful experiences of first sex; the myth of heavenly love emphasises the mental and emotional connection between partners; an earthly myth tells sex as a predestined meeting of two partners. The manner in which stories were constructed was different for male and for female participants, and these differences have implications for the power dynamics at play between genders in the context of sexual interaction, especially first sex. Further the research's storied and ritualised approach to these gender differences suggests the performative aspect of gender. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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Religious nationalism and negotiation : Islamic identity and the resolution of the Israel/Palestine conflic
- Authors: De Villiers, Shirley
- Date: 2004
- Subjects: Arab-Israeli conflict Palestinian Arabs -- Civil rights -- Israel Nationalism -- Middle East Religion and politics -- Middle East Jewish-Arab relations Nationalism -- Religious aspects -- Islam -- History -- 20th century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2873 , http://hdl.handle.net/10962/d1007815
- Description: The use of violence in the Israel/Palestine conflict has been justified and legitimised by an appeal to religion. Militant Islamist organisations like Ramas have become central players in the Palestinian political landscape as a result of the popular support that they enjoy. This thesis aims to investigate the reasons for this support by analysing the Israel/Palestine conflict in terms of Ruman Needs Theory. According to this Theory, humans have essential needs that need to be fulfilled in order to ensure survival and development. Among these needs, the need for identity and recognition of identity is of vital importance. This thesis thus explores the concept of identity as a need, and investigates this need as it relates to inter-group conflict. In situating this theory in the Israel/Palestine conflict, the study exammes how organisations like Ramas have Islamised Palestinian national identity in order to garner political support. The central contention, then, is that the primary identity group of the Palestinian population is no longer nationalist, but Islamic/nationalist. In Islamising the conflict with Israel as well as Palestinian identity, Ramas has been able to justify its often indiscriminate use of violence by appealing to religion. The conflict is thus perceived to be one between two absolutes - that of Islam versus Judaism. In considering the conflict as one of identities struggling for survival in a climate of perceived threat, any attempt at resolution of the conflict needs to include a focus on needs-based issues. The problem-solving approach to negotiation allows for parties to consider issues of identity, recognition and security needs, and thus ensures that the root causes of conflicts are addressed, The contention is that this approach is vital to any conflict resolution strategy where identity needs are at stake, and it provides the grounding for the success of more traditional zero-sum bargaining methods. A recognition of Islamic identity in negotiation processes in Israel/Palestine may thus make for a more comprehensive conflict resolution strategy, and make the outcomes of negotiations more acceptable to the people of Palestine, thus undermining the acceptance of violence that exists at present.
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- Date Issued: 2004
"From the inside": how to attribute emotions to others
- Authors: Mitova, Velislava Atanasova
- Date: 2003
- Subjects: Emotions (Philosophy) , Theory (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2741 , http://hdl.handle.net/10962/d1007661 , Emotions (Philosophy) , Theory (Philosophy)
- Description: I argue that a specific version of Theory theory is necessary and sufficient for attributions and predictions of others' emotions. Theory theory is the view that we attribute and predict others' mental states on the basis of a (tacit) body of generalisations about mental states, their situational input, and behavioural output. Theory's antagonist, Simulation theory, is the view that we ascribe mental states to others by simulating - or running ' off-line ' - their doxastic, emotional, and contextual situations. My argument for Theory's necessity and sufficiency develops in three stages: First, I show that some version of Theory is necessary for predictions of all mental states on the basis of the ascriber's knowledge of the subject's other mental states. The linchpin of the arguments here consists of considerations from relevant similarity between the ascriber's and the subject's mental states. Simulation cannot provide criteria for such similarity, and so, I argue, predictions must advert to Theory. Second, I develop a sui generis model of emotions, according to which (i) emoticns' necessary objects and typical causes are concern-based construals; and (ii) emotions qua attitudes are (a) complex states embedded in a narrative structure, (b) characterised in terms of their object, their expressive behaviour, and their phenomenology. Third, I show that, considering the nature of the objects of emotions, some Theory is necessary for emotion-predictions and -attributions. Moreover, I develop a version of Theory, based on my analysis of emotions and narrative structures, and argue that this version of Theory is both necessary and sufficient for emotion-predictions and -attributions.
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- Date Issued: 2003
A comparative analysis of Java and .NET mobile development environments for supporting mobile services
- Authors: Zhao, Xiaogeng
- Date: 2003 , 2013-05-23
- Subjects: Microsoft .NET , Java (Computer program language) , Mobile computing , Wireless communication systems
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4578 , http://hdl.handle.net/10962/d1003064 , Microsoft .NET , Java (Computer program language) , Mobile computing , Wireless communication systems
- Description: With the rapid development of wireless technologies, traditional mobile devices, such as pagers and cellular phones, have evolved from a purely communications and messaging-oriented medium to one that supports mobile data communication in general and acts as an application platform. As shown in a recent survey conducted by MDA, easy access to the present-day wireless Internet has resulted in mobile devices gaining more and more attention and popularity. The growth of and demand for mobile Web applications is expected to increase rapidly in the near future, as a range of software companies and mobile device manufacturers release increasingly accessible tools for creating mobile Web application and services. From a variety of possible development environments of this kind, the author has selected and examined two leading contenders, the J2ME and the Microsoft .NET mobile Web application development environments. This document reports the product life cycle of pilot mobile web applications, designed and implemented in each host environment in tum. A feature-by-feature investigation and comparison of the J2ME and .NET environments was carried out, covering the range of issues necessary for a complete mobile Web application development life cycle. The resulting analysis addresses features and efficiencies of the application development environment and the target deployment environment, the degree to which the resultant services are compatible on a variety of platforms, and the ease with which applications can be designed to be extensible. The thesis offers an objective evaluation of the J2ME and the .NET mobile development environments, which highlights their strengths and weaknesses, and suggests guidelines for designing, creating, and deploying high quality mobile Web applications. The research uncovers no clear winner across all categories assessed. J2ME currently favours situations in which bandwidth is limited and client side processing power is relatively sufficient, it exerts the processing power of mobile devices over distributed network environments. .NET requires a less constrained network throughput, but performs adequately on clients with more limited processing power, supports a more diverse target platform range, and offers a more efficient, in terms of development time, development environment. Both technologies are likely to receive significant user support for some time. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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- Date Issued: 2003
A comparison of depressed and non-depressed mothers' speech to two-month old infants in a South African peri-urban settlement
- Authors: Gulle, Gillian Julie
- Date: 2003
- Subjects: Postpartum depression Postpartum depression -- South Africa Mother and infant Mother and infant -- South Africa Speech perception in infants
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3172 , http://hdl.handle.net/10962/d1007801
- Description: Research shows that maternal depression has adverse effects on mother-infant attachment and subsequent infant development (Cogill, Caplan, Alexandra, Robson & Kumar, 1986). The mechanisms through which this comes about are unclear. Murray & Cooper (1997) suggest an impaired pattern of mother-infant communication is responsible. Within this, Murray proposes that maternal speech may be a key factor. This study constitutes a preliminary exploration into the mechanisms through which maternal depression effects mother-infant interaction in South Africa. 147 predominantly Xhosa-speaking mother-infant dyads that took part in a broader epidemiological study on post-partum depression in Khayelitsha (Cooper, Tomlinson, Swartz, Woolgar, Murray & Molteno, 1999) made up the subjects. Maternal depression was assessed according to the Structured Clinical Interview for DSMIV (SCID). Maternal speech recorded from standard, five-minute, face-to -face mother-infant interactions was translated and analysed according to a coding system developed by Murray (Murray, Kempton, Woolgar & Hooper, 1993). The speech of depressed mothers to their two month old infants was compared to the speech of non-depressed mothers on dimensions of focus, affect and agency, and the role of infant gender was assessed. Results revealed no significant group differences for depression. Maternal speech to male infants was found to hold significantly less ascription of agency than to female infants. Findings suggest that maternal speech may be too narrow a marker of maternal depression in this context and that broader indices are needed. It is recommended that future research control for measures of social adversity, factor in cultural and language particularities, and consider contextual aspects of mother-infant interaction / attachment processes, in investigating the mechanisms through which post-partum depression leads to negative infant outcome in the developing world.
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- Date Issued: 2003
A critical analysis of the coverage of Uganda's 2000 referendum by The New Vision and The Monitor newspapers
- Authors: Wakabi, Wairagala
- Date: 2003
- Subjects: National Resistance Movement (Uganda) , New Vision (Uganda) , Monitor (Uganda) , Democracy -- Uganda , Political participation -- Uganda , Mass media -- Political aspects -- Uganda , Press and politics -- Uganda , Freedom of the press -- Uganda , Uganda -- Politics and government -- 1979-
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3492 , http://hdl.handle.net/10962/d1002947 , National Resistance Movement (Uganda) , New Vision (Uganda) , Monitor (Uganda) , Democracy -- Uganda , Political participation -- Uganda , Mass media -- Political aspects -- Uganda , Press and politics -- Uganda , Freedom of the press -- Uganda , Uganda -- Politics and government -- 1979-
- Description: On July 29 2000, Uganda held a referendum to decide whether to continue with the ruling Noparty Movement system or to revert to the Multi-party platform. This research entails a qualitative content analysis of the role the media played in driving debate and understanding of the referendum and its role in the country’s democratisation process. The research is informed by Jurgen Habermas’s public sphere paradigm as well as the sociological theory of news production. The research covers Uganda’s two English dailies – The New Vision and The Monitor, examining whether they provided a public sphere accessible to all citizens and devoid of ideological hegemony. It concludes that the newspapers were incapable of providing such a sphere because of the structural nature of Ugandan society and the papers’ own capitalistic backgrounds and ownership interests. The research concludes that such English language newspapers published in a country with a low literacy rate and low income levels, can only provide a public sphere to elite and privileged sections of society. A case is then made that multiple public spheres would be better suited to represent the views of diverse interest groups.
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- Date Issued: 2003
A critical investigation of managing the standards development process for the life insurance industry in Namibia
- Authors: Kaimu, Himeesora Irene
- Date: 2003
- Subjects: Life insurance -- Management -- Namibia Insurance -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1481 , http://hdl.handle.net/10962/d1003362
- Description: The development of standards for education and training is regarded as a very important activity by many countries. Any country that sets standards for education and training is trying to define its training system and avoid duplication of training by providers who do not see eye to eye. National standards are public documents accessible to anyone interested in education and training. Namibia introduced standards setting as a core activity of administering the National Qualifications Framework in 1996 after the passing of the Namibia Qualifications Act by parliament. This research attempts to gain an understanding of how the process of developing standards for the Life Assurance Sector in Namibia was managed by focusing on the experiences of three persons who took part in the process of developing the said standards. The case study approach enabled me to gain considerable insight into management issues that may have influenced the process of developing these specific standards. The findings illuminate the management and leadership issues which characterised the process for the LA Industry. Several management issues emerge as key elements in the process. These include: A strong emphasis on transformational leadership through clear vision crafting; empowerment through emancipatory thinking; OD features such as problem solving and effective communication; the importance of organisational structure; the concept of a learning organisation and benchmarking as well as collegiality. This research explores the relationship between management thinking generally, and the management of the standards development process in particular.
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- Date Issued: 2003
A phenomenological investigation of a female leader's perceptions and experience of discrimination in the work place
- Authors: Mabovula, Nonceba
- Date: 2003
- Subjects: Sex discrimination against women , Sex discrimination in employment , Women -- Employment , Sexual division of labor , Women -- Economic conditions , Sex role in the work environment , Leadership in women
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1699 , http://hdl.handle.net/10962/d1003582 , Sex discrimination against women , Sex discrimination in employment , Women -- Employment , Sexual division of labor , Women -- Economic conditions , Sex role in the work environment , Leadership in women
- Description: Women are now making their mark in virtually every economic sector including traditionally male strongholds of engineering, heavy transport, construction and manufacturing. Probably the most spectacular progress by women has been in the public sector. Many women now have voting rights, follow careers which demand that they work outside of the home, enjoy professional status equal to their male compatriots, occupy top leadership positions in their societies and, furthermore, fulfil their traditional roles of wife and mother. The present study is an attempt to explore a female eader’s perceptions and experience of discrimination in her place of work. The problem has been that although there have been significant changes in women’s increased representation in recent years, it is believed that women who succeed in obtaining top management posts still have to deal with unfair barriers. These need to be more carefully explored and understood. In this study I focus on one female leader’s perceptions and experiences of leadership in an institution of higher learning. The advantages and disadvantages of such a small case study are discussed later. A phenomenological approach was used for obtaining information pertaining to the phenomenon “female leadership”, because phenomenology does offer ways of understanding not offered by other research methodologies. It enables the researcher to enter the lived world of the researched, and understand events and perceptions from a fresh point of view. A semi-structured interview was used to allow the respondent freedom to elaborate on responses in whatever manner she wished. The results obtained indicate that women are in a life-world in which, apart from the general experiences shared with their male counterparts, they are also exposed to many other forms of discrimination. Some of these are subtle, and result from years of socialisation into perceived gender role expectations. I hope that what I have discovered may help to contribute to the small but growing body of literature that seeks to understand women leaders’ experiences, and perhaps in time play a role in enhancing their relative position in education and society at large.
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- Date Issued: 2003
A review of the Kalahari group: an aid to Kimberlite exploration in this medium
- Authors: Williams, Clint
- Date: 2003 , 2013-05-23
- Subjects: Kimberlite -- Kalahari Desert , Sedimentation and deposition -- Kalahari Desert
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4916 , http://hdl.handle.net/10962/d1003216 , Kimberlite -- Kalahari Desert , Sedimentation and deposition -- Kalahari Desert
- Description: The Kalahari Group sediments cover vast portions of the Archean Kaapvaal and Congo cratons that are considered highly prospective for economic kimberlites. In southern Africa, the term Kalahari refers to a structural basin, a group of Cretaceous to recent terrestrial continental sediments and an ill-defined desert, all of which have been grouped together as the Mega Kalahari by Thomas and Shaw (1993). The Mega Kalahari grouping includes sediments stretching from South Africa in the south to the Democratic Republic of Congo in the north, and from eastern Namibia to western Zimbabwe. This sand sea, at 2.5 million km², is the largest on earth and presents significant obstacles and challenges to the kimberlite explorationist attempting to locate bedrock-hosted diamondiferous kimberlite bodies. The Mega Kalahari sediments represent an ancient depositional environment with a complex history in which the stratigraphy and age of the deposits are not particularly well constrained or understood. Low fossil content, limited exposure, poor differentiation of the dominant surficial Kalahari Sand and a limited comprehension of an extensive duricrust suite has delayed the understanding of the sedimentological and environmental history of the basin. This sequence of sediments has accumulated and evolved through fluvio-deltaic, aeolian and groundwater processes, with characteristics due to primary deposition and subsequent modification being difficult to distinguish. Deposition in the Kalahari Basin has been subject to tectonic influences, changes in drainage directions and source areas of sediments, river capture and numerous large and small climatic fluctuations both in the basin and surrounding areas. It bears the imprint of recurring cycles during which the same sediments were reworked, sometimes by different agencies, all of which exacerbate attempts to correlate sedimentary units across the sequence. The Mega Kalahari is a series of contiguous Phanerozoic sedimentary basins situated within the African Superswell. The Superswell has dominated the gross geomorphology of southern Africa and contributed significantly to the present character of the Mega Kalahari and the evolution of the drainage systems. Overall, the tectonic framework established in southern Africa by the division of Gondwanaland led to the creation of a dual drainage system, with the hingeline acting as a watershed between a coastally-orientated exoreic system and an endoreic system draining into the interior. Deposition of sediments started in the late Cretaceous. Neo-tectonic activity expressed in the rifting in central Botswana, further influenced sedimentation rates and exerted a strong control over paleo-drainage directions. This revIew presents the complexities of the Kalahari cover sequence. The most Important geomorphological and sedimentary factors to be considered when designing and implementing kimberlite exploration programs within the Mega Kalahari environment are outlined and discussed. New data from exploration drilling programs are presented on the thickness of the Kalahari within portions of northern Namibia, western Zambia and Botswana. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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- Date Issued: 2003
A situation analysis of sex education and communication and the implications thereof for HIV/AIDS prevention work
- Authors: Mankayi, Andiswa
- Date: 2003
- Subjects: Sex instruction , Safe sex in AIDS prevention , AIDS (Disease) -- South Africa -- Eastern Cape , AIDS (Disease) -- South Africa -- Eastern Cape -- Prevention
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3147 , http://hdl.handle.net/10962/d1007447 , Sex instruction , Safe sex in AIDS prevention , AIDS (Disease) -- South Africa -- Eastern Cape , AIDS (Disease) -- South Africa -- Eastern Cape -- Prevention
- Description: This study explores the history of sex communication and education over a period of fifty years (1950 to the present), in a deep rural area of the Eastern Cape. It describes patterns of sex communication between peers, between siblings, between children and parents and between young people and other non-familial agencies within communities. Communication trends are traced from the period before contraception was introduced, through to the introduction of female birth control methods into the HIV/AIDS era where the focus has been on attempting to introduce condoms. Twelve semi-structured interviews and two four-person focus groups were conducted to gather information on how the participants acquired information about sexuality and their responses to the same. The findings of the present study suggest that the widespread use of injectable contraceptives has had a marked effect on the sexual culture of the community under investigation. It has led to the collapse of the regulatory practices which were previously in place. This in turn has significantly affected the sexual communication and negotiation context. Furthermore, it has had a determining influence on male involvement in sexual reproductive health matters and has created a poor context for the adoption of condoms as a prophylactic. There were no major changes in the sexual communication context within families and within communities in that education has always been limited to instructions to avoid pregnancy. Of note was a culture of collusion between adults and children surrounding sexuality, which absolved the parties involved in addressing sexuality. These factors are understood have mediated response to HIV/AIDS prevention efforts, and need to be taken into consideration in the development of sex communication and education programmes.
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- Date Issued: 2003
A study of the powers of the Swazi monarch in terms of Swazi law and custom past, present and the future
- Authors: Khoza, Phumlile Tina
- Date: 2003
- Subjects: Kinship -- Africa Swazi (African people) -- Social life and customs Customary law -- Swaziland Constitutional law -- Swaziland Swaziland -- Politics and government
- Language: English
- Type: text , Thesis , Masters , LLM
- Identifier: vital:3702 , http://hdl.handle.net/10962/d1004723
- Description: The thesis covers the branches of law known as Constitutional law and Customary law. It focuses on the powers of the Swazi monarch, which are based on a combination of the received Western law and Swazi custom. For the purposes of this study, therefore, Swazi law and custom shall be taken to include both the statutory law and the yet unwritten customary law. Swaziland is black Africa's only remaining traditional monarchy, ruled as it is by the Ngwenyama, an indigenous institution, whose origin is derived from custom. The resilience of this ancient system of government in a continent where modernisation and constitutional democracy among other factors have led to its extinction is phenomenal, particularly because some commentators have described traditionalism in modern Africa as an "embarrassing anachronism.' In Swaziland the monarchy continues to be a vibrant system and the nation is currently engaged in a process of not only codifying the customary law but also of drafting the constitution of the country. One of the key areas of concern is the question of the distribution of power between the monarch and the people under the proposed constitution. Traditionalists are of the view that the powers that the King currently exercises should remain intact as they are a reflection of the Swazi law and custom. Progressives, on the other hand, are of the view that the current position makes the King an absolute monarch and are thus proposing a change from an absolute to a constitutional monarch. In other words they want some kind of checks and balances in the envisaged system of government. The study will show that the constitutional evolution of Swaziland and the exigencies of synthesising modern and traditional systems of governance have over the years obscured the true nature of the powers of the monarch in terms of Swazi custom. Thus before we can consider whether the future of the monarchy in Swaziland depends on the harmonisation of modern and traditional systems of governance, it is necessary to revisit the past to determine the powers of the monarch in their embryonic form, for it is from this period that we can extrapolate the powers of the Ngwenyama in terms of Swazi custom. The thesis has been arranged as follows: The first chapter will review the precolonial political system of Swaziland with a view to establishing whether monarchical authority was founded on command or consensus. The various theories, which seek to explain the foundations of the monarchical system of government, will be outlined. The second chapter will focus on European influence on the Swazi traditional system of government. The third chapter will be an analysis of the powers of the monarch under the 1968 independence constitution. The fourth chapter will focus on the effect of the repeal of the 1968 independence constitution by the Monarch. The fifth chapter will focus on the constitutional reforms under the reign of king Mswati III. The sixth and last chapter focus on proposals for reform. The research method used was in the main, an analysis of relevant legal principles as contained in textbooks, legislation, journals, the scant case law that is available in this area of the law and other relevant materials. A comparative survey of ancient African kingdoms will be done, with emphasis on those Kingdoms, which later became British colonial possessions. It is hoped that this comparative analysis will help explain the evolution of these traditional structures alongside modern governmental institutions.
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- Date Issued: 2003
Action research case studies of participatory materials development in two community contexts in Zambia
- Authors: Lupele, Justin Kalaba
- Date: 2003
- Subjects: Community development -- Zambia -- Case studies Environmental education -- Zambia -- Case studies Sustainable development -- Zambia -- Case studies
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1417 , http://hdl.handle.net/10962/d1003298
- Description: This research reports on two action research case studies of participatory materials development in two rural community contexts in Zambia, namely Chiawa and Nalusanga. It aims to explore and articulate the relationships between community-based environmental education and participatory materials development in the WWF Zambia Education Project context; clarify participatory materials development processes by identifying the roles of different ‘actors’ in these processes and identify and analyse the contextual and other factors that may influence development and use of environmental education materials in rural communities. These aims were explored by means of a number of action research cycles of inquiry in the two communities. The study also articulates the significance of considering ambivalent globalising influences such as international conferences, debates, overseas development aid, national policies and how these shape and influence materials development work in a local context. In order to gain more insight into the local contexts, I developed contextual profiles on the two communities. These capture the contextual factors that influenced the participatory materials development processes. They include issues such as language, ethnicity, literacy, power relations and the local social economy, amongst others. Although this study has been predominately guided by the socially critical orientation to research and education, I have drawn on aspects of other research orientations. I have also explored some of the emerging critiques of the socially critical orientation. The findings of this study reveal the different roles participants can play in participatory materials development; participatory materials development processes as a learning process; the dynamics of participation in an African context; the role of language and literacy in materials development; the need for open-ended process models of learning amongst adult learners and the importance of merging expert and local knowledge in participatory materials development. This study opens up possibilities for further exploration of participatory materials development processes within the WWF ZEP context and beyond.
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- Date Issued: 2003
An analysis of digital photojournalistic practices: a study of the Sowetan's photographic department
- Authors: Allan, Christopher
- Date: 2003
- Subjects: Sowetan (Johannesburg, South Africa) , Photojournalism -- South Africa , Photography -- Digital techniques , Photojournalists -- South Africa , Photojournalism -- South Africa -- Moral and ethical aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3496 , http://hdl.handle.net/10962/d1003071 , Sowetan (Johannesburg, South Africa) , Photojournalism -- South Africa , Photography -- Digital techniques , Photojournalists -- South Africa , Photojournalism -- South Africa -- Moral and ethical aspects
- Description: Photojournalism in South Africa is in the process of undergoing a shift from an analogue past to a fully digital future. This shift to digital has already been completed by many of the newspapers in the United States of America and Europe, and the new technology is seen to have made fundamental differences in the way that journalists do their job. This thesis attempts to explore the differences brought about, as well as the problems experienced by the photographic department at the Sowetan newspaper as a result of the shift to digital. How the development of technology has affected the photojournalist throughout is focused upon in a brief history of photojournalism and examples of how technology has shaped different aspects of journalism in both a positive and negative manner is considered. Exactly what digital photography is, how it has been integrated into American Photographic departments and the changes that the new technology has prompted are also explained. The manipulation of images in the past as well as the relative ease of digital manipulation are covered and concerns are raised about the future implications of digital manipulation. By conductlng participant observation and holding interviews, research data was compiled which allowed conclusions to be drawn about the impact that the shift to digital had had on the Sowetan photographic department. Intentional and unintentional consequences were expected and revealed in the research. The job of the photojournalist and photographic editor was found to have changed but perhaps not as dramatically as expected. Third world factors such as crime, poverty and lack of education were discovered to have resulted in problems that differed noticeably from those experienced by American and European photographic departments. Some expected difficulties were not experienced at all, while other major obstacles, specifically the repairs that must constantly be made to the digital cameras, continue to hamper the operations of the new digital department. Some understanding of the problems that might be encountered by future photojournalism departments that are considering making the shift to digital are arrived at, in the hope that they may be foreseen and overcome.
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- Date Issued: 2003
An empirical, in-depth investigation into service creation in H.323 Version 4 Networks
- Authors: Penton, Jason Barry
- Date: 2003 , 2013-05-24
- Subjects: Computer programming , Computer networks , Computer network protocols
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4681 , http://hdl.handle.net/10962/d1007637 , Computer programming , Computer networks , Computer network protocols
- Description: Over the past few years there has been an increasing tendency to carry voice on IP networks as opposed to the PSTN and other switched circuit networks. Initially this trend was favoured due to reduced costs but occurred at the expense of sacrificing the quality of the voice communications. Switched circuit networks have therefore remained the preferred carrier-grade voice communication network, but this is again changing. The advancement in improved quality of service (QoS) of real-time traffic on the IP network is a contributing factor to the anticipated future of the IP network supplying carrier-grade voice communications. Another contributing factor is the possibility of creating a new range of innovative, state-of-the-art telephony and communications services that acquire leverage through the intelligence and flexibility of the IP network. The latter has yet to be fully explored. Various protocols exist that facilitate the transport of voice and other media on IP networks. The most well known and widely supported of these is H.323. This work presents and discusses H.323 version 4 service creation. The work also categorises the various H.323 services and presents the mechanisms provided by H.323 version 4 that have facilitated the development of the three services I have developed, EmailReader, Telgo323 and CANS.
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- Date Issued: 2003