Evaluating uncertainty in water resources estimation in Southern Africa : a case study of South Africa
- Authors: Sawunyama, Tendai
- Date: 2009
- Subjects: Water supply -- South Africa , Water supply -- Africa, Southern , Hydrology -- South Africa , Hydrology -- Africa, Southern , Hydrologic models , Hydrology research -- South Africa , Hydrology research -- Africa, Southern , Rain and rainfall -- Mathematical models , Runoff -- Mathematical models
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6035 , http://hdl.handle.net/10962/d1006176
- Description: Hydrological models are widely used tools in water resources estimation, but they are simple representations of reality and are frequently based on inadequate input data and uncertainties in parameter values. Data observation networks are expensive to establish and maintain and often beyond the resources of most developing countries. Consequently, measurements are difficult to obtain and observation networks in many countries are shrinking, hence obtaining representative observations in space and time remains a challenge. This study presents some guidelines on the identification, quantification and reduction of sources of uncertainty in water resources estimation in southern Africa, a data scarce region. The analyses are based on example sub-basins drawn from South Africa and the application of the Pitman hydrological model. While it has always been recognised that estimates of water resources availability for the region are subject to possible errors, the quantification of these uncertainties has never been explicitly incorporated into the methods used in the region. The motivation for this study was therefore to contribute to the future development of a revised framework for water resources estimation that does include uncertainty. The focus was on uncertainties associated with climate input data, parameter estimation (and recognizing the uncertainty due model structure deficiencies) methods and water use data. In addition to variance based measures of uncertainty, this study also used a reservoir yield based statistic to evaluate model output uncertainty, which represents an integrated measure of flow regime variations and one that can be more easily understood by water resources managers. Through a sensitivity analysis approach, the results of the individual contribution of each source of uncertainty suggest regional differences and that clear statements about which source of uncertainty is likely to dominate are not generally possible. Parameter sensitivity analysis was used in identifying parameters which are important withinspecific sub-basins and therefore those to focus on in uncertainty analysis. The study used a simple framework for evaluating the combined contribution of uncertainty sources to model outputs that is consistent with the model limitations and data available, and that allows direct quantitative comparison between model outputs obtained by using different sources of information and methods within Spatial and Time Series Information Modelling (SPATSIM) software. The results from combining the sources of uncertainties showed that parameter uncertainty dominates the contribution to model output uncertainty. However, in some parts of the country especially those with complex topography, which tend to experience high rainfall spatial variability, rainfall uncertainty is equally dominant, while the contributions of evaporation and water use data uncertainty are relatively small. While the results of this study are encouraging, the weaknesses of the methods used to quantify uncertainty (especially subjectivity involved in evaluating parameter uncertainty) should not be neglected and require further evaluations. An effort to reduce data and parameter uncertainty shows that this can only be achieved if data access at appropriate scale and quality improves. Perhaps the focus should be on maintaining existing networks and concentrating research efforts on making the most out of the emerging data products derived from remote sensing platforms. While this study presents some initial guidelines for evaluating uncertainty in South Africa, there is need to overcome several constraints which are related to data availability and accuracy, the models used and the capacity or willingness to adopt new methods that incorporate uncertainty. The study has provided a starting point for the development of new approaches to modelling water resources in the region that include uncertain estimates.
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- Date Issued: 2009
Evaluation of a plant-herbivore system in determining potential efficacy of a candidate biological control agent, cornops aquaticum for water hyacinth, eichhornia crassipes
- Authors: Bownes, Angela
- Date: 2009
- Subjects: Water hyacinth -- Control -- South Africa , Eichhornia crassipedes , Pontederiaceae , Grasshoppers , Biological pest control agents -- South Africa , Weeds -- Biological control -- South Africa , Invasive plants -- Biological control -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5687 , http://hdl.handle.net/10962/d1005373
- Description: Water hyacinth, Eichhornia crassipes Mart. Solms-Laubach (Pontederiaceae), a freefloating aquatic macrophyte of Neotropical origin, was introduced into South Africa as an ornamental aquarium plant in the early 1900’s. By the 1970’s it had reached pest proportions in dams and rivers around the country. Due to the sustainability, cost efficiency and low environmental risk associated with biological control, this has been a widely used method in an attempt to reduce infestations to below the threshold where they cause economic and ecological damage. To date, five arthropod and one pathogen biocontrol agents have been introduced for the control of water hyacinth but their impact has been variable. It is believed that their efficacy is hampered by the presence of highly eutrophic systems in South Africa in which plant growth is prolific and the negative effects of herbivory are therefore mitigated. It is for these reasons that new, potentially more damaging biocontrol agents are being considered for release. The water hyacinth grasshopper, Cornops aquaticum Brüner (Orthoptera: Acrididae), which is native to South America and Mexico, was brought into quarantine in Pretoria, South Africa in 1995. Although the grasshopper was identified as one of the most damaging insects associated with water hyacinth in its native range, it has not been considered as a biocontrol agent for water hyacinth anywhere else in the world. After extensive host-range testing which revealed it to be safe for release, a release permit for this candidate agent was issued in 2007. However, host specificity testing is no longer considered to be the only important component of pre-release screening of candidate biocontrol agents. Investigating biological and ecological aspects of the plant-herbivore system that will assist in determination of potential establishment, efficacy and the ability to build up good populations in the recipient environment are some of the important factors. This thesis is a pre-release evaluation of C. aquaticum to determine whether it is sufficiently damaging to water hyacinth to warrant its release. It investigated interactions between the grasshopper and water hyacinth under a range of nutrient conditions found in South African water bodies as well as the impact of the grasshopper on the competitive performance of water hyacinth. Both plant growth rates and the response of water hyacinth to herbivory by the grasshopper were influenced by nutrient availability to the plants. The ability of water hyacinth to compensate for loss of tissue through herbivory was greater under eutrophic nutrient conditions. However, a negative linear relationship was found between grasshopper biomass and water hyacinth performance parameters such as biomass accumulation and leaf production, even under eutrophic conditions. Water hyacinth’s compensatory ability in terms of its potential to mitigate to detrimental effects of insect feeding was dependent on the amount of damage caused by herbivory by the grasshopper. Plant biomass and the competitive ability of water hyacinth in relation to another freefloating aquatic weed species were reduced by C. aquaticum under eutrophic nutrient conditions, in a short space of time. It was also found that grasshopper feeding and characteristics related to their population dynamics such as fecundity and survival were significantly influenced by water nutrient availability and that environmental nutrient availability will influence the control potential of this species should it be released in South Africa. Cornops aquaticum shows promise as a biocontrol agent for water hyacinth but additional factors that were not investigated in this study such as compatibility with the South African climate and the current water hyacinth biocontrol agents need to be combined with these data to make a decision on its release. Possible management options for this species if it is to be introduced into South Africa are discussed.
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- Date Issued: 2009
Evaluation of an implemented quality management system (QMS) at one of the South African government departments: employee perceptions of the effect of the QMS intervention
- Authors: Maluleke, Yinywane Leon
- Date: 2009
- Subjects: Total quality management in government Public administration -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:739 , http://hdl.handle.net/10962/d1003859
- Description: This study is about the employee perceptions of the effect of the Quality Management System intervention that was implemented at one of South Africa’s government departments. This organisation’s Quality Management System being one of the first in the government or public sector in South Africa to be implemented, creates the possibility for this Quality Management System model to be used to develop Quality Management Systems in other departments or organisations belonging to the government or the public sector in South Africa and the Southern African region. According to Madu & Kuei (1995), Quality Management System describes a situation where all business functions are involved in a process of continuous quality improvement. This implies that the development and implementation of Quality Management Systems in government departments and the public sector will improve the quality of services delivery. The findings of this study indicated that a Quality Management System can be used to improve the level of service delivery in the public sector. The Quality Management System should be planned developed and implemented over a period of time in five phases (i) Phase 1 - Determination of the scope of Quality Management System implementation (ii) Phase 2 – Training (iii) Phase 3 – Development of Procedures (iv) Phase 4 – Pilot implementation of procedures (v) Phase 5 – Evaluation of Quality Management System and rollout. It usually takes three or more years to establish an organisation-wide Quality Management System, although technical improvement to the workflow can be as quickly as six to eight months. And finally, for the Quality Management System to be developed, implemented and maintained successfully, Maximisation of Performance objectives, Good Leadership, Motivation of staff, Implementation of Change Management, Employee Involvement, Long-term Top Management Commitment, Provision of Training, Introduction of Quality Improvement Projects, Measuring Quality Management System Progress and Reward Accomplishment, are the fundamental concepts or principles that should be considered.
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- Date Issued: 2009
Exploring job search and the causes of endogenous unemployment: evidence from Duncan Village, South Africa
- Authors: Duff, Patrick Alexander
- Date: 2009
- Subjects: Unemployment , Unemployment -- Social aspects -- South Africa -- East London -- Duncan Village , Job hunting -- South Africa -- East London -- Duncan Village , Labor market -- South Africa
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: vital:1026
- Description: Despite high rates of unemployment in South Africa, there is little consensus about its origins and solutions to the problem. Job search (how and when people search for work)is one aspect of the unemployment problem. Job search is shown to be a complex process strongly linked to the endogenous structure of the labour market. The flaws in traditional methods (theoretical and measurement) highlight this. Using data from a tailor-made survey in Duncan Village (a peri-urban area in Buffalo City, South Africa) the research examines factors that influence the effectiveness of job search. The results show that mode of search (how people look for work) is used as a signal by employers. Degrees of success are stratified amongst searchers using either ‘word of mouth’, place-to-place or formal modes of search. The thesis provides a method-test to reveal a complex body of evidence that has yet to be fully explored by practitioners in this field.
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- Date Issued: 2009
Exploring the consequences of perceptions of the divine, and the church, in the making of self-identity: a case study of congregants from Roman Catholic and Charismatic communities in East London, South Africa
- Authors: Sundberg, Dianne
- Date: 2009
- Subjects: Giddens, Anthony Catholic Church -- South Africa -- East London -- Case studies Catholic Church -- Doctrines Glory of God -- Case studies Church -- South Africa -- East London -- Case studies Feminist theology -- South Africa Self -- Case studies Identity (Psychology) -- Case studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3298 , http://hdl.handle.net/10962/d1003086
- Description: This thesis explores the impact and consequences of the teachings of the church, perceptions of The Divine [God] and of Mary, in the making of personal identity. In spite of secularisation and the prediction that the church would collapse in the face of modern science, recent evidence suggests that - in its various forms - religion, and belief in a higher power remain important and potentially powerful aspects in society. A foundation stone of the Christian faith is the doctrine of Imago Dei: humanity created in the image of The Divine. Although not male, The Divine is repeatedly spoken of - and addressed - in anthropomorphic masculine terms, but perceived in gender-specific stereotypical terms. Alongside The Divine - in the Roman Catholic Church - is Mary, the mother of Jesus. She is spoken of in feminine terms, but is also perceived in gender-specific stereotypical terms. Although not officially considered to be divine, Mary fulfils important needs in the life of the believer and it is in this context that her influence is evaluated. The role of the church as a community - and social institution - is also explored, based on Giddens’ theories of identity development. Belonging to a church community can provide a context for relationship, continuity, and trust. However, this potentially positive environment can have negative implications on self-identity in that restrictions on self-expression and personal choice can be as limiting as the sense of belonging is liberating. The patriarchal nature of the church is deemed to be of immense relevance. In order to establish the role of the church, The Divine, and Mary in the making of self-identity, in-depth interviews were conducted with twelve research participants belonging to Charismatic and Roman Catholic congregations, and Giddens’ criteria for self-identity development was used as the standard for evaluating participants’ personal sense of self-identity. Explored from the perspective of feminist theology, the findings of this qualitative research project suggest that it is more than gender language regarding The Divine that affects the agent’s perception of The Divine, and that the role of the church in identity formation is not uniform in its influence. It also concludes that perceptions of Mary can be influential in the development of selfidentity.
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- Date Issued: 2009
Factors enabling and constraining ICT implementation in schools: a multiple case study of three secondary schools in Lesotho
- Authors: Kalake, Matsitso
- Date: 2009
- Subjects: Education -- Lesotho Computer-assisted instruction -- Lesotho Information technology -- Lesotho Educational technology -- Lesotho Education, Secondary -- Lesotho -- Data processing Education -- Lesotho -- Computer network resources Educational innovations -- Lesotho Educational change -- Lesotho
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1858 , http://hdl.handle.net/10962/d1004539
- Description: This study focused on the implementation of ICTs in secondary schools in Lesotho. The main question addressed was: What are the enabling and constraining factors in the implementation of ICTs in schools? The work was undertaken in recognition of the fact that schools in the country were autonomously acquiring computers and using a variety of curricula without much coordination and policies from the government. There were factors encouraging schools to delve into this educational change: and challenges were already evident. This required further investigation. The research approach commenced with a critical review of the literature. Literature was drawn from developed and developing countries in order to understand the process of ICT implementation from a variety of contexts. The enquiry about the implementation process in all the countries focused on the rationale behind the use of ICTs in schools. ICT policies guiding implementation, principal leadership, teacher professional development and ICT resources. The literature review was followed by case studies of three secondary schools in Mafeteng district in Lesotho. Using both qualitative and quantitative methods of research, the study sought to determine from key people in three case study schools their overall understanding of how the process of implementation was carried out and what they perceived as enablers and constraints. The findings revealed that planning, access arrangements, training, support and to a lesser extent resources played a role in either impeding or encouraging the key ICT implementers at school and classroom level. Additionally, the key role of the principal and the MoE were highlighted in the study.
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- Date Issued: 2009
Finite fuzzy sets, keychains and their applications
- Authors: Mahlasela, Zuko
- Date: 2009
- Subjects: Fuzzy sets , Finite groups , Lattice theory , Economics -- Mathematical models
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5406 , http://hdl.handle.net/10962/d1005220 , Fuzzy sets , Finite groups , Lattice theory , Economics -- Mathematical models
- Description: The idea of keychains, an (n+1)-tuple of non-increasing real numbers in the unit interval always including 1, naturally arises in study of finite fuzzy set theory. They are a useful concept in modeling ideas of uncertainty especially those that arise in Economics, Social Sciences, Statistics and other subjects. In this thesis we define and study some basic properties of keychains with reference to Partially Ordered Sets, Lattices, Chains and Finite Fuzzy Sets. We then examine the role of keychains and their lattice diagrams in representing uncertainties that arise in such problems as in preferential voting patterns, outcomes of competitions and in Economics - Preference Relations.
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- Date Issued: 2009
Forecasting solar cycle 24 using neural networks
- Authors: Uwamahoro, Jean
- Date: 2009
- Subjects: Solar cycle , Neural networks (Computer science) , Ionosphere , Ionospheric electron density , Ionospheric forecasting , Solar thermal energy
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5468 , http://hdl.handle.net/10962/d1005253 , Solar cycle , Neural networks (Computer science) , Ionosphere , Ionospheric electron density , Ionospheric forecasting , Solar thermal energy
- Description: The ability to predict the future behavior of solar activity has become of extreme importance due to its effect on the near-Earth environment. Predictions of both the amplitude and timing of the next solar cycle will assist in estimating the various consequences of Space Weather. Several prediction techniques have been applied and have achieved varying degrees of success in the domain of solar activity prediction. These techniques include, for example, neural networks and geomagnetic precursor methods. In this thesis, various neural network based models were developed and the model considered to be optimum was used to estimate the shape and timing of solar cycle 24. Given the recent success of the geomagnetic precusrsor methods, geomagnetic activity as measured by the aa index is considered among the main inputs to the neural network model. The neural network model developed is also provided with the time input parameters defining the year and the month of a particular solar cycle, in order to characterise the temporal behaviour of sunspot number as observed during the last 10 solar cycles. The structure of input-output patterns to the neural network is constructed in such a way that the network learns the relationship between the aa index values of a particular cycle, and the sunspot number values of the following cycle. Assuming January 2008 as the minimum preceding solar cycle 24, the shape and amplitude of solar cycle 24 is estimated in terms of monthly mean and smoothed monthly sunspot number. This new prediction model estimates an average solar cycle 24, with the maximum occurring around June 2012 [± 11 months], with a smoothed monthly maximum sunspot number of 121 ± 9.
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- Date Issued: 2009
Framing economic news: an examination of coverage of the Growth, Employment and Redistribution (GEAR) strategy in Business Day
- Authors: Mudzamiri, Wonder Tariro
- Date: 2009
- Subjects: Business day English newspapers -- South Africa South African newspapers Mass media -- Economic aspects Economic development -- South Africa South Africa -- Economic policy South Africa -- Politics and government -- 1994-
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3469 , http://hdl.handle.net/10962/d1002924
- Description: This thesis examines the way in which Business Day portrayed the neo-liberal logic of the Growth, Employment and Redistribution (GEAR) strategy as both common sense and natural. It utilises framing analysis, adapting its application to the context of media studies as the guiding theoretical framework in trying to understand how Business Day, as representative of the mainstream financial media, frame economic policy issues. Using content analysis, the thesis examines how elite sources are the preferred news sources above ordinary citizens and are thus in a position to shape news content in line with their neo-liberal views on the economy. The thesis analyses how Business Day, by means of the globalisation frame and other frames, legitimated and in the process perpetuated the GEAR strategy as the macroeconomic policy of choice for South Africa in 1996 against the background of the country’s political transformation and economic policy development in preceding years.
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- Date Issued: 2009
Gains derived from illegal activities :an analysis of the taxation consequences
- Authors: Mtshawulana, Lungiswa Bukeka
- Date: 2009
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:886 , http://hdl.handle.net/10962/d1001640
- Description: Income Tax in South Africa is levied in terms of the Income Tax Act 58 of 1962 on taxable income, which, by definition, is arrived at by deducting from "gross income" receipts and accruals that are exempt from tax as well as deductions and allowances provided for in the Act. The Income Tax Act provides no guidance with regard to the taxation of illegal activities, except to prohibit the deduction of expenditure incurred in paying fines or in relation to corrupt activities, as defined. An analysis of the taxation of income derived from theft, fraud and prostitution and the deductibility of expenses relating to that income, is the question addressed in this thesis. In this thesis, an analysis was made of relevant case law in relation to the provisions of the Income Tax Act in an attempt to provide clarity. A brief comparison was also macie of American, United Kingdom and South African tax law. Similarities were found between the American, United Kingdom and South African tax regimes in relation to the taxation of income, but there appeared to be more certainty in America and the United Kingdom in relation to the deduction of expenses. The thesis concludes that recent case decisions have provided certainty in relation to income from illegal activities, but the tax status of the deduction of expenses remains uncertain.
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- Date Issued: 2009
Geomagnetically induced current characteristics in southern Africa
- Authors: Ngwira, Chigomezyo Mudala
- Date: 2009
- Subjects: Magnetic Observatory (South African Council for Scientific and Industrial Research) Geomagnetism -- Africa,Southern Computer networks -- Africa, Southern Magnetospheric currents
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5469 , http://hdl.handle.net/10962/d1005254
- Description: Geomagnetically induced currents (GICs), resulting from adverse space weather, have been demonstrated to cause damage to power transformers at mid-latitudes. There is growing concern over possible GIC effects in the Southern African network due to its long power lines. Previous efforts to model the electric field associated with GICs in the Southern Africa region used a uniform ground conductivity model. In an effort to improve the modelling of GICs, GIC data together with Hermanus Magnetic Observatory geomagnetic field data were used to obtain a multilayered ground conductivity model. This process requires a definition of the network coefficients, which are then used in subsequent calculations. This study shows that GIC computed with the new network coefficients and the multilayered ground conductivity model improves the accuracy of GIC modelling. Then GIC statistics are derived based on the recordings of the geomagnetic field at Hermanus, the new network coefficients and ground conductivity model. The geoelectric field is modelled using the plane wave method. The properties of the geomagnetic field, their time derivatives and local geomagnetic indices were investigated to determine their characteristics in relation to the GIC. The pattern of the time derivatives of the horizontal geomagnetic field closely follow the rate of change of the north-south geomagnetic component rather than the east-west component. The correlation between the GIC and the local geomagnetic field indices was also investigated. The results show that there is a higher correlation between the GIC and the east-west components of the geomagnetic local indices than between the GIC and the north-south components. This corresponds very well with the orientation of the power lines feeding the power transformers at the South African Grassridge electrical substation GIC site. Thus, the geoelectric field driving the GIC at Grassridge is north-south oriented. Further, it is shown that the geomagnetic observation sites have a strong directional preference with respect to the Grassridge GIC site.
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- Date Issued: 2009
Grade 10 life science teachers' understanding and development of critical thinking skills in selected schools in Namibia
- Authors: Avia, Ndiyakuphi
- Date: 2009
- Subjects: Education -- Namibia Life sciences -- Study and teaching (Secondary) -- Namibia Critical thinking -- Study and teaching (Secondary) -- Namibia Education -- Curricula -- Namibia Educational change -- Namibia Teachers -- Training of -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1550 , http://hdl.handle.net/10962/d1003432
- Description: The educational reform policy in Namibia adopted the principles and practice of learner-centred education, a policy based on constructivist epistemology. This approach emphasises that learners are constructors of knowledge and that they must discover information and construct their own learning. Constructivist techniques require the use of critical thinking through learners’ active involvement in the learning process. The aim is for learners to use critical thinking to identify problems, ask questions, reason, examine and solve problems in real situations and make sound decisions. This approach provides learners with activities and experiences that stimulate them to learn to think for themselves and to ask questions. Therefore, teachers need to design activities that require learners to think critically and act independently through mastering these various modes of inquiry. The purpose of this study was to explore how the selected Grade 10 Life Science teachers understand and implement critical thinking in their teaching practice. I conducted the study in two secondary schools from the Omusati region in Namibia using a case study to gain insight into the implementation of critical thinking. Three data collection instruments: interviews, document analysis and class observations were used. The reason for conducting this study was to gain a better understanding of how teachers use various strategies to foster critical thinking skills in Life Science and the challenges they experience in teaching in secondary schools. The results of the study revealed that teachers have a theoretical understanding of what critical thinking implies and the role it plays in learning. They are also aware of the strategies used to develop critical thinking skills. However, these theoretical perspectives do not reflect in their teaching in that some of the strategies that the teachers used did not bring about meaningful learning. Learners are still required to recall factual knowledge, thus active involvement of the learners is limited. The study also revealed that there are specific issues that hamper the implementation of critical thinking, which include superficial understanding of learner-centered education, teacher-tell approach, overcrowded curriculum, inexplicit syllabus, lack of good examples from the textbooks and examinations, too short lesson periods, lack of language proficiency and lack of professional development. The findings indicate that despite the theoretical understanding of the teachers in this study, their actual practice of developing critical thinking skills is problematic. The study concludes that teachers should be encouraged to design better-structured activities in order to involve learners beyond just being listeners. In light of these findings, the study recognizes a need for ongoing in-service professional development to support teachers in modelling critical thinking to their learners and to teach them to think critically. The findings of the study will serve to inform both my and my colleague’s professional practice as advisory teachers with regard to what to focus on when advising and supporting the teachers in schools.
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- Date Issued: 2009
Harmful scripts : raunch femininity as the disguised reiteration of emphasized feminine goals : an exploration of young women's accounts of sexually explicit forms of public expression
- Authors: Thorpe, Jennifer
- Date: 2009 , 2013-07-12
- Subjects: Femininity Women -- Sexual behavior Feminine beauty (Aesthetics) Women's rights Human body -- Political aspects Stereotypes (Social psychology)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2840 , http://hdl.handle.net/10962/d1004521
- Description: Women are subject to a number of societal recommendations about what it means to be an 'ideal' woman. These recommendations take the form of social scripts, constructing an idea of ideal femininity, which women must perform in order to be socially accepted and successful. 'Emphasized femininity', a white, Western, script of femininity is dominant and has been critiqued by feminists, social theorists, and individual women for the limits that it places on women's behaviour. As a result a number of alternative scripts of femininity have arisen. These scripts can provide alternatives to restrictive understandings of female sexuality and beauty - they can serve to challenge 'appropriate' feminine behaviour and hence allow women to live more freely. Raunch femininity is a contemporary alternative that uses sexually explicit public performance, and encourages specific body and dress norms, in an attempt to challenge the norms of emphasized femininity. This thesis looks at raunch femininity, specifically its norms of sexuality and beauty, in the hopes of understanding what the effects of such a script are on women's behaviour. Theoretical understandings and explanations of women's lives are often contradicted by reports that women provide of their lived experiences. For this reason, this thesis investigates the lived experiences of women who self-identify as subscribers to this script in order to assess to what extent superficial expressions of freedom have deeper effects on women's freedom. The tension between theory and empirical reports is evident. However, in many cases, the reports of research participants reveal that the script of raunch femininity, like other scripts of feminine behaviour, has its own limits that women must abide with in order to be accepted. This thesis argues that these limits outweigh the benefits of this script. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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- Date Issued: 2009
Hierarchical spatial structure and levels of resolution of intertidal grazing and their consequences on predictability and stability at small scales
- Authors: Diaz Diaz, Eliecer Rodrigo
- Date: 2009
- Subjects: Marine algae -- Effect of grazing on Shorelines -- South Africa Zostera marina Intertidal ecology Spatial analysis (Statistics)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5707 , http://hdl.handle.net/10962/d1005393
- Description: The aim of this research was to assess three hierarchical aspects of alga-grazer interactions in intertidal communities on a small scale: spatial heterogeneity, grazing effects and spatial stability in grazing effects. First, using semivariograms and cross-semivariograms I observed hierarchical spatial patterns in most algal groups and in grazers. However, these patterns varied with the level on the shore and between shores, suggesting that either human exploitation or wave exposure can be a source of variability. Second, grazing effects were studied using manipulative experiments at different levels on the shore. These revealed significant effects of grazing on the low shore and in tidal pools. Additionally, using a transect of grazer exclusions across the shore, I observed unexpected hierarchical patchiness in the strength of grazing, rather than zonation in its effects. This patchiness varied in time due to different biotic and abiotic factors. In a separate experiment, the effect of mesograzers effects were studied in the upper eulittoral zone under four conditions: burnt open rock (BOR), burnt pools (Bpool), non-burnt open rock (NBOR) and non-burnt pools (NBpool). Additionally, I tested spatial stability in the effects of grazing in consecutive years, using the same plots. I observed great spatial variability in the effects of grazing, but this variability was spatially stable in Bpools and NBOR, meaning deterministic and significant grazing effects in consecutive years on the same plots. Both the significance in grazing effects and spatial stability depended on the level of resolution (species, functional, biomass) at which the algal assemblage was evaluated, suggesting hierarchical variability. In order to be able to predict spatial variability in the effects of grazers in the upper eulittoral zone using biotic and abiotic micro- and macrofactors, a conceptual model was proposed, based on data from several multiple-regressions. This linked the interactions among three elements: idiosyncratic heterogeneity, micro and macrofactors. This suggests that spatial variability can be a product of these factors, while spatial stability can be caused by the same or different combinations of factors. In conclusion, grazing and other ecological phenomena must be studied hierarchically, not only through spatiotemporal scales, but also at different levels of resolution, as these also influence our perception of patterns.
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- Date Issued: 2009
How can school gardens be used for teaching environmental activities in the technology learning area at senior phase?
- Authors: Mazingisa, Bongani Eric
- Date: 2009
- Subjects: Environmental education -- Study and teaching -- South Africa -- Eastern Cape Environmental education -- Activity programs -- South Africa -- Eastern Cape Gardening -- Study and teaching -- South Africa -- Eastern Cape Technology -- Study and teaching -- South Africa -- Eastern Cape School gardens -- South Africa -- Case studies
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1558 , http://hdl.handle.net/10962/d1003440
- Description: This study was conducted as a case study at the rural Ethridge Junior Secondary School which is located in the Eastern Cape Province of South Africa. The aim of the study was to investigate how school gardens could be used to teach environmental activities in the Technology Learning Area at senior phase. The study examined how environmental activities in the school garden can be used to develop technological concepts and knowledge and for developing technological problem-solving abilities. Furthermore, it examined the relationship between technology, society and environment, and how structural and socio-cultural factors influence the use of environmental activities in the school garden. The overall approach was a case study. The data was generated using qualitative methods such as interviews, observation, workshops and document analysis of learners’ work. Of all the research tools used, the interviews and observations were the most fascinating and informative methods. The study focused on various activities undertaken by Grade 8 learners in their Technology Learning Area. These activities were compost making, planting and irrigating. The study showed how learners from poor rural homes can use available resources and suitable technology processes to plant vegetables. In terms of resources, virtually all resources used in the study were free, sourced locally and/or borrowed. This indicated that even in poor, rural areas materials are available to make structures and complete activities. In terms of available suitable technology, learners in the study explored the use of old car tyres for planting containers that can be easily transported. They also, using easily available resources such as tin cans, explored how to design and construct an effective, low-water consumption, low cost irrigation devise. The study explored the achievement of Learning Outcomes (LO) using the school garden. This study uses the school garden as a teaching aid to achieve the three main LO’s in the Technology Learning Area (LA). This study has also indicated that LO’s are sometimes intertwined, that is to say that more than one can be achieved at the same time. The three activities (compost making, planting and irrigation) were used to attain the required LO’s. The study indicates that LO 1 (related to applying technological processes and skills ethically and responsibly) can easily be achieved by designing a compost box and a compost heap, making them and evaluating the process. LO 2 (related to understanding and applying relevant technological knowledge) could easily be achieved in the irrigation activity, and LO 3 (related to demonstrating interrelations between science, technology, society and environment) could easily be attained in both compost making and planting. The study also showed that curriculum activities, such as those used in this study, are influenced by socio-cultural and structural factors that influence the curriculum contextualizing process. The main findings of the study are captured in five analytical statements. These form the basis for a set of recommendations to inform the use of school gardens as a resource for technology teaching in Ethridge Junior Secondary School, and possibly for other rural schools.
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- Date Issued: 2009
How on-line publishing contributes to democracy, press freedom and the public sphere: a case study of Nyasatimes online and The Daily Times newspaper in Malawi
- Authors: Kakhobwe, Penelope
- Date: 2009
- Subjects: Daily Times (Malawi) Nyasatimes (Malawi) Democracy -- Malawi Freedom of the press -- Malawi Journalism -- Political aspects -- Malawi Online journalism -- Malawi Electronic newspapers -- Malawi Electronic publishing -- Malawi
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3441 , http://hdl.handle.net/10962/d1002895
- Description: Since the demise of the Berlin Wall and communism, many African countries have adopted a Western-model democracy as a system of governance. However, the media has not been liberalised to reflect this new discourse as constraints in many African countries pertaining to press freedom still exist. The internet appears to have the potential to challenge the political power of governments (Tsagarousianou, 1998:167). It has been posited that it has the potential to offer more platforms for information especially in the case of restrictive media environments. This study set out to investigate the impact of on-line publishing in Malawi. It explored how the emergence of this new form of publishing through the internet has affected the public sphere, democracy and press freedom in Malawi. The main focus was the level of press freedom at on-line newspapers as compared to traditional newspapers. It used the public sphere theory and literature on the internet as a technology of freedom as its theoretical framework. Using a case study approach by focusing on two newspapers; Nyasatimes on-line and Daily Times, the study used the coup plot coverage in May 2008 in Malawi by both newspapers as reference for the measurement of the level of press freedom. The study used qualitative content analysis and semi-structured interviews as its research methods. The research revealed that Nyasatimes enjoys more freedom to publish and therefore appears to have more press freedom than its more traditional counterpart. However, Nyasatimes also faces some unique challenges. The findings also revealed that press freedom in Malawi is not only affected by government through legislation but other factors and players as well play a central role in determining the level of press freedom for traditional media. The study therefore concludes that despite the internet’s ability to transcend local regimes of authority and censorship pertaining to press freedom, the challenges facing traditional media still need to be addressed as it is the primary source of information for most people in Malawi with on-line newspapers being simply supplementary.
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- Date Issued: 2009
Human-river relationships in the Kat River catchment and the implications for integrated water resource management (IWRM) : an exploraratory study
- Authors: Birkholz, Sharon Alice
- Date: 2009
- Subjects: Aquatic ecology -- South Africa -- Kat River , Rivers -- South Africa -- Kat River -- Sociological aspects , Rivers -- South Africa -- Kat River , Water supply -- South Africa -- Kat River -- Management , Human ecology -- South Africa -- Kat River , Stream ecology -- South Africa -- Kat River
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: vital:4838 , http://hdl.handle.net/10962/d1005514
- Description: Through out this study ‘relational scenarios’ were seen as the possible outcomes of the expression of human-river relationships in a catchment. Working within Inglis’s (2008, pg. 10) comment that ‘the Human World Relationship is expressed through a person’s views and behaviour towards the natural world, which can be either constructive or destructive’, two relational scenarios were selected to represent these two predicted outcomes of human-environment (or in the case of this thesis human-river) relationships: IWRM, seen as constructive and mutually beneficial to both the social and ecological system, and the Tragedy of the Commons, seen as destructive and parasitic in nature. In respect to this assertion, a conceptual framework or model was developed and used to guide the inductive process of this research. Through a social survey (administered via semi-structured interviews) of stakeholders (water-users) in the Kat River Catchment, Eastern Cape, South Africa, social attitudes towards the Kat River were explored. These attitudes were considered as variables that relate to the expression of ‘Human World Relationships’ namely ‘values and behaviour’ (Inglis, 2008, pg. 10). The findings of this thesis confirm that attitudes are influential components of human-river relationships in the Kat River Catchment. It was observed from the findings that the attitudes individuals have towards the Kat River have the potential to influence the ways people interact with the River and its associated resources, and are in turn influenced by the condition of the River and connections people have or make with the River within their daily lives. Such relationships in turn affect the management of the River and its water resources and influence how individuals approach water-related issues and undertake the associated activities. Given this understanding it was then proposed that attitudes could provide information that enables the prediction of likely ‘relational scenarios’ (IWRM or the Tragedy of the Commons) in a catchment. The findings appear to support this proposal, and three main attitude groups (utilitarian, associative and dissociative) were identified and used to further the discussion into how this knowledge could be used in predicting possible relational scenarios based on human-river relationships. Further exploration of the identified attitude groups suggested that these variables are significantly influenced by environmental ethics and place attachment (present in the community) and a series of guiding frameworks were developed to facilitate the exploration of the attitude groups relative to these concepts. The frameworks were generated from the hypothesis that knowledge of attitude groups in a catchment, in connection with the relative degrees to which moral values and worldviews are expressed, could provide insight into the readiness of a catchment system for the implementation of IWRM and/or the facilitative steps needed to shift the influence of unfavourable attitude groups (i.e. dissociative attitudes). Such steps would most likely involve extensive educational, awareness and capacity building programs. Finally, given the above theoretical frameworks, inductively developed from the findings of the social survey and related literature, the conceptual model was reevaluated and extended to include the thesis findings and hypotheses. It is suggested that in a catchment where there is a balance between the expression of utilitarian and associative attitude groups, then there is a high probability of finding present evidence of mutually beneficial human-river relationships already in play, as well as ‘fertile soil’ for the promotion of IWRM and philosophies and skills that generate such relationships. Alternatively in an area with a strong expression of dissociative attitudes, it is more likely to find evidence of destructive, more parasitic-like relationships being expressed, and a lack of commitment and interest in being involved in changing the status quo. It is likely that where both associative and dissociative attitudes are present there will be an overlap of elements of both scenarios – a situation that is probable in most catchments – depending on the strength of expression of either attitude group the balance will shift (be shifting) between the two relational scenarios.
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- Date Issued: 2009
Imagined pasts, suspended presents : South African literature in the contemporary moment
- Authors: Mbao, Wamuwi
- Date: 2009
- Subjects: Post-apartheid era -- South Africa South African literature (English) -- History and criticism Authors, South African -- 21st century -- Criticism and interpretation South African literature -- 21st century -- History and criticism South African fiction (English) -- History and criticism Xenophobia -- South Africa Apartheid in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2202 , http://hdl.handle.net/10962/d1002244
- Description: Scholarship on Post-Apartheid South African literature has engaged in various ways with the politics of identity, but its dominant mode has been to understand the literature through an anxious rupture-continuation paradigm in which the Apartheid past manifests itself in the present. However, in the contemporary moment, there are writers whose texts attempt to forge new paths in their depictions of identities both individual and collective. These texts are useful in contemplating how South Africans experience belonging and dislocation in various contexts. In this thesis, I consider a range of contemporary South African texts via the figure of lifewriting. My analysis demonstrates that, while many texts in the contemporary moment have displayed new and more complex registers of perception concerning the issue of ‘race’, there is a need for more expansive and fluid conceptions of crafting identity, as regards the politics of space and how this intersects with issues of belonging and identity. That is, much South African literature still continues along familiar trajectories of meaning, ones which are not well-equipped to understand issues that bedevil the country at this particular historical moment, which are grounded in the political compromises that came to pass during the ‘time of transition’. These issues include the recent spate of xenophobia attacks, which have yet to be comprehensively and critically analysed in the critical domain, despite the work of theorists such as David Coplan. Such events indicate the need for more layered and intricate understandings of how our national identity is structured: Who may belong? Who is excluded? In what situations? This thesis engages with these questions in order to determine how systems of power are constructed, reified, mediated, reproduced and/or resisted in the country’s literature. To do this, I perform an attentive reading of the mosaic image of South African culture that emerges through a selection of contemporary works of literature. The texts I have selected are notable for the ways in which they engage with the epistemic protocol of coming to know the Other and the self through the lens of the Apartheid past. That engagement may take the form of a reassertion, reclamation, displacement, or complication of selfhood. Given that South African identities are overinscribed in paradigms in which the Apartheid past is primary, what potentials and limits are presently encountered when writing of the self/selves is attempted? My study goes beyond simply asserting that not all groups have equal access to representation. Rather, I demonstrate that the linear shaping of the South African culture of letters imposes certain restrictions on who may work within it. Here, the politics of publishing and the increasing focus on urban spaces, such that other spaces become marginalized in ways that reflect the proclivities of the reading public, are subjected to close scrutiny. Overall, my thesis aims to promote a rethinking of South African culture, and how that culture is represented in, and defined through, our literature.
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- Date Issued: 2009
Incorporating indigenous knowledge in the teaching of isiXhosa to pharmacy students at Rhodes University
- Authors: Mapi, Thandeka Priscilla
- Date: 2009
- Subjects: Rhodes University. Academic Development Programme Healers -- South Africa Traditional medicine -- South Africa Xhosa language -- Study and teaching -- South Africa Pharmacy -- Study and teaching -- South Africa Ethnoscience -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3622 , http://hdl.handle.net/10962/d1007469
- Description: Traditional healing is one of the most trusted methods of healing in South Africa, especially in rural areas, where health-care infrastructure is inadequate. People have depended on this method of healing since time immemorial. That belief has been strengthened by the fact that this method keeps people in touch with their ancestors. Traditional healers are trusted and believed to be the link between people and their ancestors. The Dwesa community is amongst the areas that still have strong belief in traditional healing. Traditional healers have a variety of methods of healing that they use, these methods have been trusted for people of all age groups. These methods are ukugabha, ukufutha and ukucima. Traditional healers prescribe them for both major and minor illnesses. They are believed to play a role in cleansing people from inside and outside. These methods together with other methods that are used in traditional healing are being explored in this study. This exploration is based on the fact that this information will be integrated into the teaching of isiXhosa to Pharmacy students at Rhodes University. This is an initiative to create awareness amongst health-care practitioners about traditional healing methods, so that they can caution and advise their patients about medicine taking behaviours, also to make them approach the subject in a sensitive manner. An isiXhosa course has been taught to Pharmacy students, as a pilot in 2007 and as an elective in 2008 onwards. This course deals with cultural issues in a broad manner, the issue of traditional healing specifically, and these methods of healing are outlined in the course, such that students have an understanding first of what a traditional healer is and their role in providing health-care services.
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- Date Issued: 2009
Indigenous knowledges: a genealogy of representations and applications in developing contexts of environmental education and development in southern Africa
- Authors: Shava, Soul
- Date: 2009
- Subjects: Foucault, Michel, 1926-1984 Education -- Africa, Southern Environmental education -- Africa, Southern Indigenous peoples -- Africa, Southern Ethnoscience -- Africa, Southern Knowledge, Theory of Genealogy (Philosophy) Medicinal plants -- Africa, Southern
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1885 , http://hdl.handle.net/10962/d1005920
- Description: This study was developed around concerns about how indigenous knowledges have been represented and applied in environment and development education. The first phase of the study is a genealogical analysis after Michel Foucault. This probes representations and applications of plant-based indigenous knowledge in selected anthropological, botanical and environmental education texts in southern Africa. The emerging insights were deepened using a Social (Critical) Realism vantage point after Margaret Archer to shed light on agential issues in environmental education and development contexts. Here her morphogenetic/morphostatic analysis of social transformation or reproduction is used to trace changes in indigenous knowledge representations and applications over time (from the pre-colonial into the post-colonial era). The second phase uses the same perspectives and tools to extend the analysis of power/knowledge relationships into the interface of indigenous communities and modern institutions in two case study settings in the Eastern Cape of South Africa. This study reveals colonially-derived hegemonic processes of modern/Western scientific institutional representations/interpretations of the knowledges of indigenous communities. It also tracks a continuing trajectory of their dominating and prescriptive mediating control over local knowledges from the pre-colonial context through into the post-colonial period in southern Africa. The analysis reveals how this hegemony is sustained through the deployment of institutional strategies of representation that transform local knowledges into the disciplinary knowledge discourses of modern scientific institutions. These representational strategies therefore generate/reproduce and validate disciplinary discourses about the other, constructing disciplinary 'regimes of truth'. In this way modern institutions appropriate and displace indigenous/local knowledges, silence the voices of local communities and regulate individual and community agency within a continuing subjugation of indigenous knowledges. This study reveals how working within modern institutions and disciplinary knowledges in participative education and development interactions can serve to implicate indigenous researchers in these institutional hegemonic processes. The study also notes evidence of a continued resistance to hegemonic Western knowledge discourses as indigenous communities have sustained many knowledge practices alongside Western knowledge discourses. There is also evidence of a recent emergence of counter-hegemonic indigenous knowledge discourses in environmental education and development practices in southern Africa. It is noted that these have been contingent upon the changing political terrain in southern Africa as this has opened the way for alternative discourses to the dominant conventional Western knowledges in formal education and development contexts. The counterhegemonic discourses invert power/knowledge relations, decentre hegemonic discourses and reposition indigenous knowledges in formal education and development contexts. This study suggests the need to foreground indigenous knowledges as a process of knowledge decolonisation that gives contextual and epistemic relevance to environmental education and development processes. This calls for a need for new strategies to transform existing institutions by creating enabling spaces for the representational inclusion of indigenous knowledges in formal/conventional knowledge discourses and their application in social contexts. This opens up possibilities for plural knowledge representations and for their integrative and reciprocal co-engagement in situated contexts of environmental education and development in southern Africa.
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- Date Issued: 2009