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An examination of the Mobisam project and Grocott's Mail : towards mobile social accountability monitoring in Grahamstown

  • Authors: Reinecke, Romi Kami
  • Date: 2015
  • Subjects: Grocott's Mail (Grahamstown, South Africa) , Electronic discussion groups -- South Africa -- Grahamstown , Citizen journalism -- South Africa -- Grahamstown , Municipal services -- South Africa -- Grahamstown , Government accountability -- South Africa -- Grahamstown , Social action -- South Africa -- Grahamstown , Municipal services -- Citizen participation , Municipal government -- South Africa -- Grahamstown
  • Language: English
  • Type: Thesis , Masters , MSocSc
  • Identifier: vital:3541 , http://hdl.handle.net/10962/d1017782
  • Description: This thesis critically examines the nature and purpose of the MobiSAM partnership, in relation to its value as a model resonating with normative theories on the role of the media in South African democratic society. The MobiSAM project introduces a mobile polling application, designed for citizens to provide real-time, user-generated data on crucial municipal service delivery such as clean water in Grahamstown, Eastern Cape, South Africa. The project has partnered with the local community newspaper, Grocott's Mail, to broadcast this data, with the aim to facilitate citizen participation in public problem solving and support local government accountability in service delivery. Despite pervasive poverty in areas such as the Eastern Cape, mobile penetration in South Africa is near universal. The MobiSAM partnership is an ongoing effort to forge new links between social accountability monitors, new media, traditional media, citizens and local government around public issues in Grahamstown, in line with the development objectives of the post-apartheid South African state. The overall theoretical framework for this thesis is taken from Christians, Glasser, McQuail, Nordenstreng and White's Normative Theories of the Media, which provides an analysis of four roles of the media in a democratic society, that is: the monitorial, the facilitative, the radical and the collaborative roles. Within each of these roles, the stated journalistic approach is explored, that is investigative journalism, public journalism, radical journalism and development journalism. Public journalism is focused on as having the most resonance with the goals of the MobiSAM partnership. The chosen research design is a critical realist case study with the selected methods of thematic document analysis and, primarily, in-depth interviews with key project participants. The research goals were to analyse this primary data against the normative theory on the role of the media in a democratic society, and the 'real world' constraints posed by the project’s specific political and socioeconomic context. The findings conclude by offering certain recommendations and areas for further research, such as the central importance of a dedicated municipal reporter for covering complex public issues. This critical realist case study, drawing on qualitative interviews with both the accountability monitors and the media practitioners, interrogates the philosophical understandings on the role of the media in this new project, towards an empirical model for advancing substantive socio-economic change through media in South Africa.
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  • Date Issued: 2015

An exploration into the conditions enabling and constraining the implementation of quality assurance in higher education: the case of a small comprehensive university in South Africa

  • Authors: Masehela, Langutani Meriam
  • Date: 2015
  • Subjects: University of Venda -- Evaluation , Education, Higher -- South Africa -- Evaluation , Universities and colleges -- South Africa -- Auditing , Quality assurance -- South Africa , Quality assurance -- Standards -- South Africa , Universities and colleges -- South Africa -- Evaluation , Educational accountability -- South Africa , Education, Higher -- Standards -- South Africa , Educational evaluation -- South Africa , Critical realism , Social realism
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:1334 , http://hdl.handle.net/10962/d1020312
  • Description: At an international level, demands for accountability in respect of the quality of teaching and learning in higher education are increasing. This is also the case in South Africa. The response to these demands has taken the form of the introduction of quality assurance systems to higher education. In South Africa, a formal national external quality assurance was introduced to the higher education system in 2001 as a result of the establishment of the Higher Education Quality Committee. The Higher Education Quality Committee is a standing committee of the South African Council on Higher Education. Like other quality assurance agencies across the world, the Higher Education Quality Committee has the responsibility for i) auditing institutions of higher education and ii) accrediting learning programmes. The first cycle of institutional audits ran from 2004 until 2011. As quality assurance was introduced to the higher education system and the first cycle of institutional audits began, universities in South Africa developed policies and procedures intended to assure quality in three areas of their core functioning: research, teaching and learning and community engagement. The University of Venda, which is the focus of the study on which this thesis is based, was no exception. As a practitioner in the Centre for Higher Education Teaching and Learning at The University of Venda, it was my observation that the policies and procedures intended to assure quality in teaching and learning were not always implemented by academic staff members. This was in spite of poor student performance data which raised questions about the quality of the teaching and learning processes in place. The study underpinning this thesis was designed to explore this phenomenon. More specifically, it aimed to identify the conditions enabling and constraining the implementation of policies and procedures in two Schools in the University: the School of Health Sciences and the School of Human and Social Sciences. In order to explore these conditions, I adopted Roy Bhaskar’s Critical Realism as an under-labouring philosophy for the study. Critical realism posits a view of reality comprising three strata, none of which can be reducible to the other. The first of these strata is termed the level of the Empirical and consists of the experiences and observations which become apparent to us through the senses. The second layer, the Actual, consists of events from which these experiences and observations emerge. Underpinning both of these layers is a further layer, the Real, which is not accessible by empirical means and which consists of structures and mechanisms which generate both events at the level of the Actual and experiences and observation at the level of the Empirical. The design of my study sought to reach this deepest layer of reality to identify these mechanisms. Bhaskar’s critical realism is philosophy which needs to be operationalized using substantive, or explanatory, theory. For this purpose, I drew on Margaret Archer’s social realism. The design on my study drew on case study methodology and involved in-depth interviews with members of the two Schools which each formed cases within the more overarching case of the University itself. In addition to these interviews, I analysed a range of institutional documents related to the assurance of quality in teaching and learning. The exploration of enabling and constraining conditions at the level of the Real allow me to make a series of recommendations in the final Chapter of my thesis intended to enhance the quality assurance system introduced to the University.
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  • Date Issued: 2015

An exploration of business level strategy at the bottom of the pyramid: a case study of Twizza, Eastern Cape

  • Authors: Sityoshwana, Ludwe Lusu
  • Date: 2015
  • Language: English
  • Type: text , Thesis , Masters , MBA
  • Identifier: http://hdl.handle.net/10962/54486 , vital:26569
  • Description: This qualitative study focuses on business level strategy adopted by Twizza to compete in the bottom of the pyramid market in the Eastern Cape, South Africa. Twizza enjoyed huge success between the years 2010 - 2014 as a medium to large sized manufacturer of carbonated soft drinks in the Eastern Cape. In light of this, the current study seeks to answer the following: What business level strategy did top management at Twizza adopt to compete and grow in the BoP market in the Eastern Cape, South Africa? The study takes the form of a case study to explore and understand the patterns of decisions adopted by Twizza’s top management in competing at the bottom of the pyramid. As such, the main objective of the study was to identify the business level strategy adopted by Twizza which enabled their superior performance within the BoP market. The study adopts Porter`s typology to explore business level strategy. Stratified, purposive sampling was used to identify 4 top managers as participants in this study. A total of 7, semi-structured, interviews were used to collect critical incidents from top management of Twizza. This was the primary data used in this study. This type of data was combined with relevant information which was gathered via published press articles and on-line commentary. The study found that central to Twizza’s business strategy were four pillars, namely, strict control and management of manufacturing costs, product quality equal to that of market leaders, the ability of the organisation to manufacture its own raw materials and ability to ensure product availability to the market to the market. These findings reveal that Twizza employed a hybrid strategy, anchored by cost leadership. Thus, Twizza incorporated elements of differentiation and best value strategies to offer its customers affordable quality.
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  • Date Issued: 2015

An exploration of perceptions, adaptive capacity and food security in the Ngqushwa local municipality, Eastern Cape, South Africa

  • Authors: Mazinyo, Sonwabo Perez
  • Date: 2015
  • Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10353/19043 , vital:40107
  • Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35percent of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
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  • Date Issued: 2015

An exploration of perceptions, adaptive capacity and food security in the Ngqushwa local municipality, Eastern Cape, South Africa

  • Authors: Mazinyo, Sonwabo Perez , Zhou, Leocadia
  • Date: 2015
  • Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10353/19032 , vital:40106
  • Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35% of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
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  • Date Issued: 2015

An exploration of the effect of world politics on SADC's capacity to manage and resolve violent conflict

  • Authors: Matsanga, Mavis
  • Date: 2015
  • Subjects: Conflict management -- Zimbabwe , Non-governmental organizations -- Zimbabwe , Humanitarian intervention -- Zimbabwe
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/6886 , vital:21157
  • Description: The rise of International Non-Governmental Organisations (INGOS) in the post-Cold War era in Africa exerted pressure on conflict resolution mechanisms as governments responded to perceived and real pressure from external, mainly Western countries. INGOs are well resourced and conduct ‘humanitarian’ and other work funded by donors. The issue of funding is critical to control and legitimacy. It is also tied to achievement of intended goals. The study explores the relationships and in some cases conflict between Western NGOs in Zimbabwe and the government during the period when the latter was experiencing diplomatic estrangement with Western countries. The qualitative study seeks to establish whether INGO operations were influenced by political relations. The researcher interviewed twenty experts in NGO and governmental operations using an interview guide. Data was collected and entered into Nvivo software where it was thematically analysed. The major findings of the study are that the political strand is the main relational context that determined the relationship between the government and INGOs. INGOs were viewed as active conflict drivers mostly due to the bias towards certain political parties and being conduits of Western initiatives. Local conflict resolution mechanisms were also established to be inadequate. The study recommends that the government of Zimbabwe needs to work on maladministration and resolve differences with Western countries. Local NGOs and INGOs should not meddle in politics in order to have a trustworthy relationship with government while donor funds are more appreciated when channelled through governments.
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  • Date Issued: 2015

An exploration of the effects of mindfulness on people with an HIV positive diagnosis living in the Eastern Cape, South Africa

  • Authors: McIntyre, Tracy-Leigh
  • Date: 2015
  • Subjects: Mindfulness-based cognitive therapy Stress management HIV infections
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/9903 , vital:26631
  • Description: Mindfulness research is growing considerably, though there is very little research in the area of HIV and mindfulness. This study explored and described the experience of a sample of HIV positive people, before and after an 8 week Mindfulness Based Stress Reduction (MBSR) programme, to ascertain whether mindfulness can positively impact the CD4 count of the participants, with the consequent improvement to their immune systems. The incidence of depression, anxiety and stress levels were also explored. The research sample consisted of 17 participants recruited from a local hospital clinic. Purposive sampling was used to source participants. The mixed method approach of data gathering was made up of a pre-test post-test battery of questionnaires and blood tests. Mindfulness levels were assessed with the Five Facet Mindfulness Questionnaire (FFMQ) and Mindfulness Attention Awareness Scale (MAAS) at 3 intervals, while depression, anxiety and stress were assessed by means of the Depression Anxiety Stress Scale (DASS-21). Key findings included the following: the drop out rate for this population group was large, mindfulness practices do not always have a positive effect on immune functioning when there are other confounding variables at play, all participants reported they benefited from the 8 week MBSR course, though their results did not always indicate this. In conclusion it is proposed that mindfulness is potentially beneficial.
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  • Date Issued: 2015

An exploration of the principle of Dance Movement Therapy in water resource management research practice:

  • Authors: Copteros, Athina
  • Date: 2015
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/142016 , vital:38024 , ISBN PECS Conference: Social-ecological dynamics in the Anthropocene, Spier Estate, Cape Town, 2-5 November , http://www.pecs-science.org/research/news/news/2015pecsconferencesocialecologicaldynamicsintheanthropocene.5.40768cbb14b32a0480b694.html
  • Description: An exploration of the principle of Dance Movement Therapy in water resource management research practice
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  • Date Issued: 2015

An exploration of the school nutrition programme's potential to catalyse community-based environmental learning : a case study of a rural Eastern Cape school

  • Authors: Tshabeni, Veliswa
  • Date: 2015
  • Subjects: National School Nutrition Programme (South Africa) , School children -- Food -- South Africa -- Eastern Cape , Children -- Nutrition -- South Africa -- Eastern Cape , Environmental education -- South Africa -- Eastern Cape , Social learning -- South Africa -- Eastern Cape , Food security -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:2063 , http://hdl.handle.net/10962/d1020306
  • Description: The purpose of this study was to explore the extent to which a School Nutrition Programme can catalyse community-based environmental learning and promote food security in the school and the community. This is an interpretive case study of a junior secondary school in the rural Eastern Cape province of South Africa. The school is located in an area characterised by high levels of poverty and under-nutrition. The school’s food garden, a central focus of this study, contributes to the School Nutrition Programme, which falls under the National School Nutrition Programme (NSNP). The aim of the NSNP is to alleviate poverty in public schools. This case study was conducted by means of questionnaires, semi-structured interviews, and document analysis and field observations. The data set was analysed, firstly, to ascertain if the School Nutrition Programme functions as a community of practise (Wenger, 1998). Thereafter, the data set was analysed to identify the knowledge related to food security and environmental sustainability that is learned and shared in the School Nutrition Programme, and also how such learning took place. The study found that the School’s Nutrition Programme was indeed operating as a community of practice and that it created a platform for sharing explicit and tacit knowledge and skills related to food security and environmental sustainability. The case study also revealed the contextual and experience-based nature of knowledge related to food cultivation.
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  • Date Issued: 2015

An exploration of the structural, cultural and agential conditions that shape life skills teachers' responses and experiences in teaching sexuality and HIV and AIDS

  • Authors: Hakaala, Beatha Ndinelao
  • Date: 2015
  • Subjects: Life skills -- Study and teaching (Secondary) -- Namibia , Sex instruction -- Study and teaching (Secondary) -- Namibia , HIV infections -- Study and teaching (Secondary) -- Namibia , AIDS (Disease) -- Study and teaching (Secondary) -- Namibia
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:2029 , http://hdl.handle.net/10962/d1017340
  • Description: This paper reports findings on how Namibian secondary school Life Skills teachers are exercising their agency to teach or not to teach Sexuality and HIV and AIDS, a subject which is regarded as sensitive and has been surrounded by secrecy and has issues which are cloaked by silence and taboos. The aim of the study was to explore the structural and cultural factors that shape the responses and experiences of Life Skills teachers in teaching sexuality and HIV and AIDS. The study was conducted through observations and interviews with four full-time Life Skills teachers. Document analysis was carried out throughout the study in which lesson plans, portfolios, assessment forms, Life Skills syllabuses, schemes of works, national curriculum documents and subject policy on HIV and AIDS were analysed. The data were analysed by identifying categories, codes and themes using the analytic dualism framework, and the literature review was used to summarise the findings. The study revealed that all teachers operate in an environment that consists of the National structures such as high teacher: learner ratio in their classrooms that they have to teach Life Skills and do day to day counselling, a lack of teaching and learning support material that they should use to scaffold the learning of sexuality and HIV and AIDS, and little time allocated to Life Skills teaching. The same study also revealed that the teaching of Life Skills is hampered by the cultural structures which emerged from teachers’ discourses as evidenced from the data which shows that cultural properties have powers that condition teachers in teaching sexuality and HIV and AIDS. This included learners’ silence in sex-related discussion versus teachers’ position; discourses on the importance of full-time Life Skills teachers in school; comfort in teaching selected topics in Life Skills; Life Skills teachers’ perceptions on parents’ feelings on teaching sexuality and HIV and AIDS in schools, and perceptions on the Life Skills teachers’ position and teaching sexuality and sex education. While the findings revealed that teachers are conditioned by the structural and cultural conditions that acted as constraints to teaching sexuality and HIV and AIDS, the observations revealed agency on their part. The study finding depicts instances where teachers acted in agreement or in contravention of the structural and cultural pressures or conditions in their environments.
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  • Date Issued: 2015

An exposition of Hilbert C-modules

  • Authors: Sokopo, Bulelani Joab
  • Date: 2015
  • Subjects: Mathematics Algebra , Functions, Continuous Mathematical analysis
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/50008 , vital:41974
  • Description: In trying to prove that derivations of type I AW -algebras are inner, I. Kaplansky introduced and developed the basics of the concept of Hilbert C- modules. He sought to generalize the idea of a Hilbert space by replacing the field C of all complex numbers with a general (commutative and unital) C-algebra. Twenty years later, the concept was broadened and expanded to non-commutative C-algebras by W. L. Paschke and M. A. Rieffel in their papers on inner product modules over B-algebras and induced representations of C-algebras, respectively. Since then, the theory of Hilbert C-modules has grown rapidly. It was used by G. G. Kasparov as the framework for his bivariant K-theory. More recently, Hilbert C-modules have formed the technical basis for the C*-algebraic approach to quantum group theory. The aim of this dissertation is to provide as detailed an account as possible of the theory of Hilbert C-modules, as given in a book of E. C. Lance, up to and including the KSGNS construction. The KSGNS construction, named after Kasparov, Stinespring, Gelfand, Naimark and Segal, is a generalization to Hilbert C-modules of the familiar GNS construction for C-algebras. The result by Kaplansky that all derivations of a type I AW-algebra are inner is given as an application in the final chapter of the dissertation.
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  • Date Issued: 2015

An external evaluation of the effectiveness of the Souns-for-literarcy program in the Knysna and Plettenberg Bay areas

  • Authors: Smith, Angelina
  • Date: 2015
  • Subjects: Educational evaluation -- South Africa -- Western Cape Literacy programs -- South Africa -- Western Cape Early childhood education -- South Africa -- Western Cape
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10948/11157 , vital:26891
  • Description: The primary objective of this study was to evaluate the effectiveness of the Souns-for-Literacy program in selected Knysna and Plettenberg Bay pre-schools. This included investigating if there were significant benefits for its recipients and recommending improvements that could be made to the program, particularly in adapting it to fit the South African context. The program claims to build letter-sound associations. In response to evidence gained in the biannual surveys done by KET, it was decided that the program warranted a more formal evaluation. It was later agreed that the evaluation should i) critically examine claims about the effectiveness of the program; ii) analyse the relative value of factors contributing to its effectiveness, such as teachers, implementation practices and the program’s material and methodology, then iii) recommend improvements that cauld be made to the program. The evaluation should also identify insights gained in developing reading skills in pre-school children, specifically in South Africa’s multicultural and multilingual contexts. The total number of schools investigated was 25 (21 pre-schools and 4 primary schools for follow-up purposes). The data collection was primarily through i) interviews with program personnel (mentors, facilitators, teachers and volunteers), ii) observations of the children interacting with the equipment of the program as well as iii) individual, informal and age-appropriate testing of letter-sound association knowledge at the end of the academic year. The findings revealed that: i) the program’s materials and methodology showed ‘highly significant’ benefits to most of its beneficiaries; ii) KET’s support system (including mentors, facilitators and volunteers) was particularly valuable in contributing to the program’s effectiveness; iii) certain adaptations to the sequence of symbol presentation for each language would benefit the children’s word-building capacity; iv)the emergent literacy skill of learning letter-sound knowledge should gain more focus during this pre-school stage.
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  • Date Issued: 2015

An in-silico investigation of Morita-Baylis-Hillman accessible heterocyclic analogues for applications as novel HIV-1 C protease inhibitors

  • Authors: Sigauke, Lester Takunda
  • Date: 2015
  • Subjects: Protease inhibitors , Heterocyclic compounds , HIV (Viruses) , HIV infections , Drug resistance , Cheminformatics
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4152 , http://hdl.handle.net/10962/d1017913
  • Description: Cheminformatic approaches have been employed to optimize the bis-coumarin scaffold identified by Onywera et al. (2012) as a potential hit against the protease HIV-1 protein. The Open Babel library of commands was used to access functions that were incorporated into a markov chain recursive program that generated 17750 analogues of the bis-coumarin scaffold. The Morita-Baylis-Hillman accessible heterocycles were used to introduce structural diversity within the virtual library. In silico high through-put virtual screening using AutoDock Vina was used to rapidly screen the virtual library ligand set against 61 protease models built by Onywera et al. (2012). CheS-Mapper computed a principle component analysis of the compounds based on 13 selected chemical descriptors. The compounds were plotted against the principle component analysis within a 3 dimensional chemical space in order to inspect the diversity of the virtual library. The physicochemical properties and binding affinities were used to identify the top 3 performing ligands. ACPYPE was used to inspect the constitutional properties and eliminated virtual compounds that possessed open valences. Chromene based ligand 805 and ligand 6610 were selected as the lead candidates from the high-throughput virtual screening procedure we employed. Molecular dynamic simulations of the lead candidates performed for 5 ns allowed the stability of the ligand protein complexes with protease model 305152. The free energy of binding of the leads with protease model 305152 was computed over the first 50 ps of simulation using the molecular mechanics Poisson-Boltzmann method. Analysis structural features and energy profiles from molecular dynamic simulations of the protein–ligand complexes indicated that although ligand 805 had a weaker binding affinity in terms of docking, it outperformed ligand 6610 in terms of complex stability and free energy of binding. Medicinal chemistry approaches will be used to optimize the lead candidates before their analogues will be synthesized and assayed for in vivo protease activity.
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  • Date Issued: 2015

An indirectly controlled high-speed servo valve using piezo actuators

  • Authors: Behre, Leander
  • Date: 2015
  • Subjects: Piezoelectric materials Piezoelectric devices -- Materials , Internal combustion engines Mechatronics Automation
  • Language: English
  • Type: Thesis , Masters , MEng
  • Identifier: http://hdl.handle.net/10948/50099 , vital:42040
  • Description: Since the exhaust emissions legislation for motor vehicles with combustion engines is complicating the manufacturing of environmental yet powerful engines more than ever, automobile manufacturers have approached this challenge by means of downsizing, hybridization of combustion and electric engines and variable valve opening times. In these cases conventional, mechanical valve trains are still used. The subject of this master thesis is the development of a mechatronic control unit as replacement for the camshaft driven valve train of common combustion engines. The system’s aim is a contribution to the progression of the development of modern combustion engines satisfying current demands in terms of economy and efficiency. The developed system is based on the “Full Variable Valve Train” project, founded at the “Institute of Vehicle Construction Wolfsburg” at the “Ostfalia University of Applied Sciences”. An indirectly controlled high speed servo valve that is actuated by a piezoelectric actuator and pressurized hydraulic fluid is being developed. The overall aim is to obtain advantages from a control engineering perspective, being able to reduce the size of the used piezo actuator and hence solve the packaging and regulation issues of the overall system. After manufacturing and improvement activities, a system could be developed that allows a variable control of the engine valve movement. The best results are achieved using a rectangular function for the engine valve actuator. The system allows engine valve operation independent from the crankshaft position and shows the potential to generate higher engine torque and power output while decreasing fuel consumption and emissions at the same time.
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  • Date Issued: 2015

An interevention strategy for improving reading comprehension in grade 9: a case study in one secondary school in East london education district

  • Authors: Fesi, Liziwe
  • Date: 2015
  • Subjects: English language -- Study and teaching -- South Africa -- Eastern Cape Reading comprehension -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , Degree
  • Identifier: http://hdl.handle.net/10353/5905 , vital:29417
  • Description: The study focused on strategies for improving reading comprehension skills at Grade 9 level through story writing in one secondary school in the East London Education District. Vygotskian theory formed the theoretical framework for this study, aligned with language theories as relevant literature for this particular research study. Data was generated from 15 Grade 9 learners who were selected from 3 Grade 9 classes using convenience sampling, comprising of five learners from Grade 9(a) intervention group, five learners from Grade 9(b) and five learners from Grade 9(c) non-intervention group who were selected for this study with the inclusion of two Grade 9 teachers and one Grade 8 teacher. Involvement of the grade 8 teacher is relevant to determine the voice from a Grade 8 teacher as an informed voice, which filtered into understanding how and why Grade 9 learners are unable to read and write with understanding in their present grade. The teachers were given three questions for semi-structured interviews. All the learners were given a specific activity as a pre-assessment without intervention strategy. The Grade 9(a), which is the intervention class, used story writing as an intervention strategy where they began a two week study using intensive intervention strategies, amounting to a total of 18 weeks study from pre-assessment to post-assessment. At the conclusion of the study the selected learners undertook a post-assessment using the same specific activity as in the pre-assessment. Subsequently, these selected Grade 9 learners’ reading comprehension pre-assessment and post-assessment was analysed. Five of the grade 9(a) learners demonstrated significant improvement in the intervention activities they were given. Grade 9(b) and Grade 9(c) showed difficulty in the post-assessment as they were the non-intervention group. It was concluded that Grade 9(a) learners performed better in the post-assessment. This could be attributed to the use of story writing as an intervention strategy to improve their English reading and reading comprehension skills. Keywords: intervention, reading, comprehension.
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  • Date Issued: 2015

An international study on the influence of intrinsic rewards on the intrinsic motivation, work engagement and retention of employees in non-profit organisations

  • Authors: Renard, Michelle
  • Date: 2015
  • Subjects: Employee motivation , Achievement motivation , Organisational behaviour
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10948/5148 , vital:20815
  • Description: The primary objective of this thesis was to investigate whether intrinsic rewards play a role in the intrinsic motivation, work engagement and retention of employees working within non-profit organisations in Australia, Belgium, South Africa and the United States of America. It therefore served to form a cross-cultural comparison between employees from these four geographically dispersed yet culturally similar countries. A further aim was to determine whether demographic differences occurred across the four constructs studied. In order to achieve these objectives, a theoretical model was constructed to highlight the relationships between the constructs under study. The study made use of both qualitative and quantitative research to achieve the above-mentioned objectives. As a result of the data obtained from 15 qualitative interviews conducted with non-profit employees in Belgium and South Africa, two measuring instruments, namely the Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale, were developed to assess intrinsic rewards and intrinsic motivation respectively. These measuring instruments were qualitatively piloted on a sample of academics and non-profit employees, and were translated from English into Dutch for use on the Belgian sample. Once these instruments had been refined, they were combined with instruments to measure work engagement and intention to quit to form a composite questionnaire. This questionnaire was completed electronically by 587 non-profit employees from the four countries under study. Data analysis was conducted in the form of descriptive and inferential statistics, including frequency tables, Cronbach’s alpha testing, exploratory and confirmatory factor analysis, Pearson’s Product Moment Correlations, chi-square tests, t-tests, analysis of variance and structural equation modelling. The quantitative findings showed that intrinsic rewards lead to higher levels of intrinsic motivation, which in turn causes higher levels of work engagement and lower levels of intention to quit. Intrinsic rewards were also found directly to predict a reduction in employees’ intentions to quit their non-profit organisations, and work engagement directly predicted an increase in intention to quit. From a cross-cultural perspective, practically significant inter-country differences were discovered across the intrinsic rewards of meaningful work and challenging work; across intrinsic motivation and its three dimensions (personal connection to one’s work, personal desire to make a difference, and personal desire to perform); and across work engagement and its three factors (absorption, dedication and vigour). In addition to these inter-country results, age and job level differences were discovered across the four constructs under study, together with significant correlations between the four constructs. The Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale were successfully validated in both English and Dutch in this study, with a number of forms of validity being confirmed through factor analyses and correlations. Reliability was proven through satisfactory Cronbach’s alpha values being obtained for both language versions of the instruments. These results theoretically contribute to literature pertaining to intrinsic rewards and intrinsic motivation as a result of the development of two measuring instruments that were empirically validated to assess these constructs. Furthermore, the results make a valuable contribution to the field of rewards management globally. This study’s findings provide evidence for causal relationships between four constructs not previously tested empirically, specifically within Australia, Belgium, South Africa and the United States of America. Consequently, this study’s results hold important implications for the management of non-profit employees worldwide.
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  • Date Issued: 2015

An interrogation of the representation of the San and Tonga ethnic ‘minorities’ in the Zimbabwean state-owned Chronicle, and the privately owned Newsday Southern Edition/Southern Eye newspapers during 2013

  • Authors: Mlotshwa, Khanyile Joseph
  • Date: 2015
  • Subjects: The Chronicle (Zimbabwe) , Newsday Southern Edition/Southern Eye (Zimbabwe) , Mass media and ethnic relations -- Zimbabwe , Mass media -- Political aspects -- Zimbabwe , Mass media and nationalism -- Zimbabwe , Minorities and journalism -- Zimbabwe , Press and politics -- Zimbabwe , San (African people) -- Social conditions , Tonga (Zambezi people) -- Social conditions , Critical discourse analysis
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3549 , http://hdl.handle.net/10962/d1018546
  • Description: This study critically interrogates representations of the San and Tonga in the Chronicle and the NewsDay Southern Edition/Southern Eye newspapers in 2013. It makes sense of how these representations and the journalistic practices that underwrite them position the ethnic groups as ‘minorities’ - in relation to other ethnic groups - within the discourses of Zimbabwean nationalism. Underpinned by a constructionist approach (Hall, 1997), the study makes sense of the San and Tonga identities otherwise silenced by the “bi-modal” (Ndlovu- Gatsheni, 2012: 536; Masunungure, 2006) Shona/Ndebele approach to Zimbabwean nationalism. In socio-historic terms, the study is located within the re-emergence of ‘ethnicity’ to contest Zimbabwean nationalism(s) during debates for the New Constitution leading to a Referendum in March 2013. The thesis draws on social theories that offer explanatory power in studying media representations, which include postcolonial (Bhabha, 1990, 1994; Spivak, 1995), hegemony (Gramsci, 1971), and discourse (Foucault, 1970, 1972; Laclau and Mouffe, 1985) theories. These theories speak to the ways in which discourses about identity, belonging, citizenship and democracy are constructed in situations in which unequal social power is contested. The thesis links journalism practice with the politics of representation drawing on normative theories of journalism (Christians et al, 2009), the professional ideology of journalism (Tuchman, 1972; Golding and Elliot, 1996; Hall et al., 1996), and the concept of journalists as an ‘interpretive community’ (Zelizer, 1993). These theories allow us to unmask the role of journalism’s social power in representation, and map ways in which the agency of the journalists has to be considered in relation to the structural features of the media industry in particular, and society in general. The study is qualitative and proceeds by way of combining a Critical Discourse Analysis (CDA) (Fairclough, 1992; Richardson, 2007) and ideological analysis (Thompson, 1990) of eight news texts taken from the two newspapers and in-depth interviews with 13 journalists from the two newspapers. This way we account for the media representations journalists produced: sometimes reproducing stereotypes, at other times, resisting them. Journalists not only regard themselves as belonging to the dominant ethnic groups of Shona or Ndebele, but as part of the middle class; they take Zimbabwean nationalism for granted, reproducing it as common-sense through sourcing patterns dominated by elites. This silences the San and Tonga constructing them as a ‘minority’ through a double play of invisibility and hyper visibility, where they either don’t appear in the news texts or are overly stereotyped.
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  • Date Issued: 2015

An investigation into an afterschool intervention programme aimed at improving learners' mental computation skills

  • Authors: Moyo, Kwethemba Michael
  • Date: 2015
  • Subjects: After-school programs -- Namibia , Mental arithmetic , Mental arithmetic -- Study and teaching (Secondary) , Mental arithmetic -- Study and teaching (Secondary) -- Activity programs , Mathematical ability
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:2041 , http://hdl.handle.net/10962/d1017352
  • Description: This case study centres round an afterschool intervention programme aimed at enhancing mental computation skills of Grade 8 learners at a secondary school in the Erongo educational region of Namibia. Nine research participants took part in the study, and the mental computational strategies exhibited by these participants constitutes the unit of analysis. The study is anchored within an interpretive paradigm and is theoretically underpinned by constructivist epistemology. Kilpatrick, Swafford and Findell’s (2001) model of mathematical proficiency provides the conceptual framework supporting the study. The research was carried out in four sequential phases – an initial pre-test, the intervention itself, a follow-up post-test, and a focus group discussion. The study highlights the underdevelopment of mental computation skills and the associated lack of appropriate mental computational strategies in secondary school learners. It is recommended that appropriate time within the school curriculum be allocated for the development of learners’ mental computation skills.
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  • Date Issued: 2015

An investigation into English second language competence and performance of Shona and Ndebele first lanuage learners

  • Authors: Nhongo, Raphael
  • Date: 2015
  • Subjects: Applied linguistics -- South Africa , Language and languages -- Study and teaching -- South Africa , Multilingual education -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10353/12216 , vital:39198
  • Description: The thrust of the study was to investigate the common ESL practices towards proficiency amongst O‟ level learners who are L1 speakers of either Shona or Ndebele and who are from either a rural or an urban setting. The aim of the study was to scrutinize how a learner‟s first language and the rural and urban environment influence ESL proficiency. The aim was to establish how rural and urban settings condition ESL proficiency and how ESL proficiency differs between these two settings. The other aim of the study was to establish the strategies that are used by teachers and learners in ESL teaching and learning and also to evaluate the effectiveness of such strategies. The study was qualitative in nature although a limited quantitative design was employed in the presentation of frequency tables. The study used a case study design. The information that was used in this study was gathered through the use of proficiency tests that were administered to forty O‟ level learners and through content analysis of learners‟ essays which were extracted from their essay exercise books. Sixteen O‟ level English language teachers, six English language examiners, one subject manager of English language and two curriculum developers were interviewed. The secondary data also played an important role in the study. The results of the study showed that teachers and learners use a number of strategies in the teaching and learning of ESL of which some of the strategies that they use have previously not been documented by other L2 researchers. It was also realized that learners in rural areas are at a disadvantage as compared to those in rural schools and such challenges include lack of exposure, inadequate reading materials, faulty instruction, unavailability of libraries and some other social issues. The major conclusion that was made in this study was that ESL learning and teaching strategies are of crucial importance to competence and performance in ESL proficiency.
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  • Date Issued: 2015

An investigation into how Grade 11 Biology teachers mediate learning through code-switching from English to Oshiwambo : a case study

  • Authors: Kanime, Justina Kashuupulwa
  • Date: 2015
  • Subjects: Biology -- Study and teaching (Secondary) -- Namibia -- Omusati , English language -- Namibia -- Omusati , Ndonga language -- Namibia -- Omusati , Code switching (Linguistics) -- Namibia -- Omusati , Pedagogical content knowledge , Native language and education -- Namibia -- Omusati
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:2034 , http://hdl.handle.net/10962/d1017345
  • Description: This study aimed to investigate how Grade 11 Biology teachers mediate learning through code-switching from English to Oshiwambo. It was triggered by my experience as a teacher when I came to observe that the majority of teachers still use the home language during their lessons though the language policy for schools in Namibia clearly states that English should be used as a medium of instruction from Grade Four onwards. The research was carried out at Happy Secondary School (pseudonym), a rural government school in Omusati Region, Namibia. It was a qualitative case study underpinned by an interpretive paradigm. The unit of analysis was the mediation of learning through codeswitching from English to Oshiwambo. Document analysis, questionnaires, interviews (semistructured, focus group, stimulated recall interviews) and lesson observations were used as data gathering techniques, to ensure adequate coverage, validity and trustworthiness of the data gathered. The study adopted Vygotsky’s social constructivism and the socio-cultural perspective in conjunction with Shulman’s Pedagogical Content Knowledge (PCK) as the theoretical frameworks. The data analysis process entailed organising data into themes from which four analytical statements were then derived in relation to the research questions. The study found that both Biology teachers and learners view code-switching as a useful tool in making learners understand the biological concepts. The study revealed that Biology teachers code-switch from English to Oshiwambo to make learners understand better, increase participation, explain concepts, elaborate, for disciplinary purposes, when giving examples of everyday knowledge events and when asking questions. The study also revealed that learners code-switch mainly for good communication, easier self-expression, due to loss of words, when unprepared to explain concepts and due to fear of making mistakes. It emerged, however, that both teachers and learners experience some challenges when codeswitching from English to Oshiwambo is used to mediate learning in Biology lessons. These include time constraints, lack of biological terms in Oshiwambo, different Oshiwambo dialects and the language policy. In addition, learners also lose the opportunity to learn English and find it difficult to answer questions in the examinations. The study revealed that Biology teachers and learners try to overcome these challenges by good lesson preparation, mini-teaching, using English/Oshindonga dictionaries or simply by adhering to the language policy.
  • Full Text:
  • Date Issued: 2015
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