Individualism, collectivism and gender as correlates of the work ethic among the employees in a government department in the Eastern Cape
- Authors: Gwelo, Blessing
- Date: 2016
- Subjects: Individualism Collectivism Work ethic
- Language: English
- Type: Thesis , Masters , Industrial Psychology
- Identifier: http://hdl.handle.net/10353/11608 , vital:39089
- Description: This study investigated the relationship between individualism, collectivism and gender among the employees at the Department of Justice and Constitutional Development situated in East London, South Africa. Individualism, collectivism and gender were used as independent variables in the study while the work ethic was used as the dependent variable. Data was gathered from a random sample of 260 employees in the Department. A questionnaire consisting of three parts was used for data collection. To gather biographical and occupational data, a self-designed 5-item questionnaire was used. The 65 item Multidimensional Work Ethic Profile (MWEP) scale Miller et al. (2002) was used to measure the work ethic. A 16-item individualism/collectivism scale (also known as the Culture Orientation Scale) formulated by Triandis & Gelfand (1998) was used in the research to measure individualism/collectivism. Data analysis was done by means of various statistical techniques, including the Pearson Product Moment Correlation Technique and Multiple Regression Analysis. The results indicated that there is a significant positive correlation between individualism and the work ethic, noting that a positive correlation for individualism implies a negative correlation for collectivism. The results of this study also found males showing to have higher work ethic than females. The results indicated that individualism/collectivism and gender together do not account for a higher proportion of variance in work ethic than any of the two separately. The study, therefore, recommends that managers must do all in their power to promote the growth and development of work ethic in their organisations through encouraging individualism, and through striving to increase the work ethic in females.
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- Date Issued: 2016
Industrial policy, institutions and industrial financing in South Africa: the role of the IDC and DBSA, and lessons from Brazil’s BNDES
- Authors: Fumbata, Nandipha
- Date: 2016
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1132 , http://hdl.handle.net/10962/d1021278
- Description: Institutions, particularly development finance institutions (DFIs) have been instrumental in economic development and the implementation of industrial policy throughout history. In 2007, the South African government identified the country’s DFIs as key to the implementation of its new industrial policy framework with the main objective of job creation. This thesis examines the impact that South Africa’s DFIs, particularly the IDC and the DBSA, have had on employment creation from 2010 to 2014. A comparative institutional approach is adopted in a case study analysis examining the role of the state in industrial financing. The financing activities of Brazil’s BNDES are explored by comparison to determine if there are possible lessons for South Africa. An analysis of the DFIs’ financial and annual reports and government policy documents is conducted. The political settlements framework is used as a basis for understanding the balance of power within the country and the impact this has had on the country’s industrial policy and industrial finance. The thesis finds that the financing activities of South Africa’s DFIs, particularly the IDC, have been directed at large scale capital intensive projects, with a large portion of disbursements channelled towards mining and mineral beneficiation. These sectors have also facilitated the most number of jobs. Even though the activities of the country’s DFIs are consistent with South Africa’s industrial policy and have facilitated job creation, it is evident that these efforts have not been on a scale that is large enough to reduce unemployment. Despite the DFIs’ efforts, there has been an increase in the number of unemployed South Africans between 2010 and 2014.
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- Date Issued: 2016
Inequality in South Africa: a possible solution within the labour market
- Authors: Ferreira, John-Edward
- Date: 2016
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/4047 , vital:20594
- Description: This study sets out to identify the most effective way in which persistently and unacceptably high levels of inequality can be reduced in South Africa. Three alternative approaches were identified from the literature and their impact explored statistically. They are: the introduction of a ‘Social Solidarity Grant’; a decrease in unemployment by 5%; and a narrowing of the skill premium through an expansion of tertiary education. It is important to note that the study makes no attempt at explaining how these outcomes might be implemented or achieved. Rather, it sets out to determine only the effect that such policies may have on measured inequality. It was found that while the introduction of a new grant had a significant effect on inequality, this effect however, was once-off. The grant would be financed by individuals in the top decile through tax increases, which would be a complicated endeavour. Both job creation and a narrowing of the skills premium were significantly effective in decreasing inequality. The narrowing of the skills premium showed more promise due to its accelerating effectiveness in decreasing inequality over time and the fact that it directly addresses the problem of wage differentials. It was noted that the extreme levels of poverty and unemployment in South Africa may dampen enthusiasm for policies that narrow the skills premium to reduce inequality. These characteristics make job creation a more popular policy option because of the positive impact on poverty and unemployment as well as on inequality.
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- Date Issued: 2016
Information security assurance model for an examination paper preparation process in a higher education institution
- Authors: Mogale, Miemie
- Date: 2016
- Subjects: Computer security -- Management -- Examinations , Computers -- Access control
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/8509 , vital:26377
- Description: In today’s business world, information has become the driving force of organizations. With organizations transmitting large amounts of information to various geographical locations, it is imperative that organizations ensure the protection of their valuable commodity. Organizations should ensure that only authorized individuals receive, view and alter the information. This is also true to Higher Education Institutions (HEIs), which need to protect its examination papers, amongst other valuable information. With various threats waiting to take advantage of the examination papers, HEIs need to be prepared by equipping themselves with an information security management system (ISMS), in order to ensure that the process of setting examination papers is secure, and protects the examination papers within the process. An ISMS will ensure that all information security aspects are considered and addressed in order to provide appropriate and adequate protection for the examination papers. With the assistance of information security concepts and information security principles, the ISMS can be developed, in order to secure the process of preparing examination papers; in order to protect the examination papers from potential risks. Risk assessment form part of the ISMS, and is at the centre of any security effort; reason being that to secure an information environment, knowing and understanding the risks is imperative. Risks pertaining to that particular environment need to be assessed in order to deal with those appropriately. In addition, very important to any security effort is ensuring that employees working with the valuable information are made aware of these risks, and can be able to protect the information. Therefore, the role players (within the examination paper preparation process (EPPP)) who handle the examination papers on a daily basis have to be equipped with means of handling valuable information in a secure manner. Some of the role players’ behaviour and practices while handling the information could be seen as vulnerabilities that could be exploited by threats, resulting in the compromise in the CIA of the information. Therefore, it is imperative that role players are made aware of their practices and iv behaviour that could result in a negative impact for the institution. This awareness forms part and is addressed in the ISMS.
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- Date Issued: 2016
Information security concerns around enterprise bring your own device adoption in South African higher education institutions
- Authors: Sauls, Gershwin Ashton
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3619 , vital:20530
- Description: The research carried out in this thesis is an investigation into the information security concerns around the use of personally-owned mobile devices within South African universities. This concept, which is more commonly known as Bring Your Own Device or BYOD has raised many data loss concerns for organizational IT Departments across various industries worldwide. Universities as institutions are designed to facilitate research and learning and as such, have a strong culture toward the sharing of information which complicates management of these data loss concerns even further. As such, the objectives of the research were to determine the acceptance levels of BYOD within South African universities in relation to the perceived security risks. Thereafter, an investigation into which security practices, if any, that South African universities are using to minimize the information security concerns was carried out by means of a targeted online questionnaire. An extensive literature review was first carried out to evaluate the motivation for the research and to assess advantages of using Smartphone and Tablet PC’s for work related purposes. Thereafter, to determine security concerns, other surveys and related work was consulted to determine the relevant questions needed by the online questionnaire. The quantity of comprehensive academic studies concerning the security aspects of BYOD within organizations was very limited and because of this reason, the research took on a highly exploratory design. Finally, the research deliberated on the results of the online questionnaire and concluded with a strategy for the implementation of a mobile device security strategy for using personally-owned devices in a work-related environment.
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- Date Issued: 2016
Inhibiting factors to the role of representative council of learners in participative governance of schools: a case study of selected schools in the Qumbu District in Eastern Cape Province of South Africa
- Authors: Poswa, Sakumzi
- Date: 2016
- Subjects: High school students -- Governance Student representative council -- Secondary education
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: http://hdl.handle.net/11260/484 , vital:27277
- Description: This study was conducted in four Qumbu District schools The literature review enabled the researcher to understand the current discourses in terms of learners’ participation in the governance of schools through the Representative Council of Learners Through the methodological application of triangulation, the study produced data on which findings were based and recommendations made Generally, evidence from the collected data reveals issues worth the attention of the researcher and relevant authorities Some of the evidence in this study was that there is need to involve learners in decision making; that the learners who are elected to be members of the RCL should be provided with orientation and training so that they become aware of the content of policy documentations that govern their roles and responsibilities These RCL members are supposed to be considered as potential decision makers and leaders in their schools It is therefore the responsibility of schools and the Department of Education to provide orientation and training for these learners so as to equip them adequately with leadership information and to develop their skills in order for them to be able to play their roles responsibly In concluding, the researcher believes that solutions to the problems identified can be resolved by considering the recommendations for implementation.
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- Date Issued: 2016
Internal fingerprint extraction
- Authors: Darlow, Luke Nicholas
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/2959 , vital:20347
- Description: Fingerprints are a non-invasive biometric that possess significant advantages. However, they are subject to surface erosion and damage; distortion upon scanning; and are vulnerable to fingerprint spoofing. The internal fingerprint exists as the undulations of the papillary junction - an intermediary layer of skin - and provides a solution to these disadvantages. Optical coherence tomography is used to capture the internal fingerprint. A depth profile of the papillary junction throughout the OCT scans is first constructed using fuzzy c-means clustering and a fine-tuning procedure. This information is then used to define localised regions over which to average pixels for the resultant internal fingerprint. When compared to a ground-truth internal fingerprint zone, the internal fingerprint zone detected automatically is within the measured bounds of human error. With a mean- squared-error of 21.3 and structural similarity of 96.4%, the internal fingerprint zone was successfully found and described. The extracted fingerprints exceed their surface counterparts with respect to orientation certainty and NFIQ scores (both of which are respected fingerprint quality assessment criteria). Internal to surface fingerprint correspondence and internal fingerprint cross correspondence were also measured. A larger scanned region is shown to be advantageous as internal fingerprints extracted from these scans have good surface correspondence (75% had at least one true match with a surface counterpart). It is also evidenced that internal fingerprints can constitute a fingerprint database. 96% of the internal fingerprints extracted had at least one corresponding match with another internal fingerprint. When compared to surface fingerprints cropped to match the internal fingerprints’ representative area and locality, the internal fingerprints outperformed these cropped surface counterparts. The internal fingerprint is an attractive biometric solution. This research develops a novel approach to extracting the internal fingerprint and is an asset to the further development of technologies surrounding fingerprint extraction from OCT scans. No earlier work has extracted or tested the internal fingerprint to the degree that this research has.
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- Date Issued: 2016
Interrogating the specific challenges of teaching play texts in heterogeneous classrooms in the Eastern Cape
- Authors: Hayes, Nicola
- Date: 2016
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:6022 , http://hdl.handle.net/10962/d1021251
- Description: This study is an autoethnographic reflection, rooted in Action Research based on my teaching experience in a multicultural high school environment in the Eastern Cape, South Africa. It is an analysis, in particular, of teaching play texts in two classes, Dramatic Arts and English Home Language, at matric level. A combination of discourse analysis and autoethnography formed the theoretical basis for the interpretation of data drawn from lesson transcripts, group interviews, learners’ reflections and my own journalled reflections. This analysis has formed the foundation for a deeper reflection on culture, the colonist within, and the colonialism embedded with in my teaching, and in the education system more broadly. At a practical level, I suggest embracing student-led and co-led discussions of literature, as advocated by Mayer (2012), as well as transcultural readings (Keating, 2007), and Drama activities, as ideals in the teaching of play texts. These techniques are designed to encourage learners to develop intellectual authority as well as allowing them the space to enter discussions around culturally sensitive topics, while minimising the teacher’s hierarchical, dominant position. I also argue for the importance of making culture an overt topic of conversation. White English-speaking South African culture, in particular has been prone to “invisibility” and, through this, an unspoken normative position, particularly in multicultural school environments. I challenge myself and others to engage in ongoing efforts to articulate our particular perception of our cultures, dynamic and diverse though they may be.
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- Date Issued: 2016
Introducing and intervention programme for grade 2 Afrikaans home language learners with reading, comprehension and phonics barriers
- Authors: De Jager, Marina , Geldenhuys, Johanna
- Date: 2016
- Subjects: Holistic education -- South Africa , Inclusive education -- South Africa , Remedial teaching -- South Africa , Language and education -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/6801 , vital:21143
- Description: This research study was aimed at the Grade 2 Afrikaans Home Language learners who encounter reading, comprehension and phonics barriers in an inclusive classroom. The Grade 2 Curriculum and Assessment Policy Statement (CAPS) Home Language curriculum and pass requirements that the learners have to master in the mainstream, was a major concern. Consequently, seventy per cent of the Grade 2 Afrikaans learners have already failed Grade 1 or 2; and some seemed to be borderline cases; as their pace of development was so slow. The intervention programme was implemented intensively outside normal school hours, through qualitative and quantitative data collection, known as the multi-method. The research approaches were conducted through action research and case-study research. Bronfenbrenner’s model indicated that intrinsic and extrinsic factors cannot be disregarded in the learner’s holistic development; therefore, parent involvement was vital during the research study. As the Individual Learner Support Team (ILST) coordinator at the research school, I have experienced the despair and perplexity of the teachers, when dealing with teaching challenges; but also, that of the learners, who face barriers to learning. A sample of six learners was identified; and one parent in each household was active during the study. The parent’s responses varied from limited to worthy feedback throughout the intervention programme. The learners’ responses were observed during the intervention programme, the classroom situation; and their perceptions during the semi-structured interviews were recorded. The intervention programme links with the Screening, Identification, Assessment and Support of SIAS process; and it involved the assistance of a remedial expert by applying remedial education, without psychometric tests. The findings revealed that the learner must be intrinsically motivated to co-operate fully. And this relates to both intrinsic and extrinsic influences. Recommendations are offered to the various stakeholders, who are directly or indirectly engaged in the learner’s scholastic development, to ensure corrective and supportive measures, which are conducive to learning.
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- Date Issued: 2016
Investigating a mathematics recovery program for assessment and intervention with groups of Grade 4 learners
- Authors: Wasserman, Anelia
- Date: 2016
- Subjects: Mathematics -- Study and teaching (Primary) , Mathematics -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2065 , http://hdl.handle.net/10962/d1020340
- Description: This study reports on the findings of my research, which was based on an intervention focused on recovery of early arithmetic strategies with one Grade 4 class of learners in a township school in Port Elizabeth in the Eastern Cape. Learners came from poor socio-economic backgrounds and initial evaluations showed that the majority of learners still relied on concrete methods, like tally counting, to perform addition and subtraction calculations even with numbers less than 10. This is not uncommon in the South African context especially with learners in low Socio-economic Status (SES) schools. The results of numerous assessments including the Department of Education’s Annual National Assessments point to a crisis in primary mathematics education where intermediate phase learners are generally operating several grade levels below the grade they are in. A large drop in mathematics performance is seen in the ANA results in grade 4 learners (the first grade of the transition from foundation phase to intermediate phase). Within this context, and my background in learning support for students, my research aimed to understand the possibilities and constraints of the implementation of a recovery program adapted from the widely implemented work of Wright et al. (2006, 2012). The primary adaptation made to the MR program involved administering the assessments and intervention with groups of (rather than individual) learners. Within the context of the many low SES under-resourced schools in SA, individualised interview based assessments and recovery is not seen as a possible remediation strategy. Drawing on a socio- constructivist perspective, my study used action research with one class of 23 learners and found that adaptation of the MR program for a group, based on eight recovery sessions, was useful for enabling some progress for all learners in terms of their early arithmetic strategies and conceptual place value. Although the need for a longer recovery period is acknowledged, the adapted program enabled some progress in levels and stages of conceptual knowledge (as conceptualized by Wright et al.’s (2006) Learning Framework in Number) for these two domains. The study concludes with some reflections and recommendations for the future.
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- Date Issued: 2016
Investigating soil microbial interactions of Portulacaria afra
- Authors: Fulmaka, Aviwe
- Date: 2016
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/54598 , vital:26592
- Description: Portulacaria afra commonly known as Spekboom contributes significantly to carbon sequestration and has been widely planted in degraded areas of the Eastern Cape. Approximately 50% of planted cuttings do not survive although the cause of this decline is unknown. Like many indigenous plants, Spekboom forms a symbiotic relationship with mycorrhizal fungi and the interaction with rhizobacteria may enhance and improve plant growth and establishment. This study aims to investigate these relationships which will include a survey of the arbuscular mycorrhizal (AM) fungal populations associated with Spekboom, determination of the causal agent of Spekboom decline, isolation and identification of the associated rhizobacteria and investigation of their plant growth promotion properties and assessing the ability of arbuscular mycorrhizal fungi and selected rhizobacteria to enhance establishment and growth of Spekboom. Soil and root samples from selected trial sites were used to assess AM fungal spore abundance and colonisation; isolation, characterization, and identification of rhizobacteria and determine the interaction of the microbes on Spekboom growth and tolerance to Fusarium. AM spore abundance and percentage root colonisation did not differ between the three Spekboom plots. Molecular analyses of the SSU region from the plots showed 4 families of AM fungi and were identified as Ambisporaceae, Glomeraceae, Claroideoglomeraceae and Paraglomeraceae. A suspected Fusarium pathogen was isolated and molecularly identified. Pathogenicity tests indicated reduced Spekboom growth with poor root development. Thirty four rhizobacterial isolates were tested for various plant growth promoting abilities. Of these, 6 were able to produce IAA which may promote plant root growth, 27 siderophores and 23 were phosphate solubilisers. Bacterial isolates were molecularly identified to be from various species of Bacillus, with some Arthrobacter, Enterobacter, Pseudomonas and Microbacterium. Inoculation of Spekboom cuttings with mycorrhizal fungi and selected rhizobacterial isolates significantly improved shoot height. Spekboom cuttings challenged with Fusarium and inoculated with mycorrhizal fungi and two rhizobacterial isolates significantly improved growth. The inoculation of cuttings in the nursery with mycorrhizal fungi and selected rhizobacteria is recommended prior to establishing Spekboom in the field.
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- Date Issued: 2016
Investigating teachers’ experiences of using multiple representations to teach fractions for conceptual understanding in 'Grades 5-7': a Namibian case study
- Authors: Iiyambo,Julia
- Date: 2016
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/1296 , vital:20044
- Description: This study investigated teachers’ experiences of using multiple representations to teach fractions for conceptual understanding in ‘grades 5 – 7’. Three teachers were involved in the study and the main goal was to explore how teachers might work with the additional tools of multiple representations to improve the teaching of fractions for conceptual understanding. Different types of multiple representations such as written mathematical symbols, descriptive written words, pictorial representations, manipulations, concrete reality, oral representations, and experience-based representations and videos or power point presentations were examined. This investigation was carried out through a focus group workshop developed by the researcher and though observations of fraction teaching which took place in schools. The research focused on the teachers working to develop their use of multiple representations to teach fractions and how they implemented what they learned in the workshop into their own classroom teaching. This study was conducted using a qualitative case study design and was oriented in the interpretive paradigm. The three participating teachers in the focus group workshop were observed and interviewed individually. The purpose of observing teaching before the workshop was to observe how the selected teachers taught fractions and in particular to observe which types of representations they used and how these were used to enhance the conceptual understanding of the learners. Post teaching took place after the focus group workshop and the different multiple representations which were used in different lessons were observed and analyzed. The purpose of the interview was to gain an understanding of the teachers’ views of using multiple representations when teaching fractions for conceptual understanding. The data showed that teachers who participated in the focus group workshop worked positively to develop their use of multiple representations to teach fractions. They made sense of fractions and were able to look at representations in different ways to develop the meaning and concepts of fractions. Teachers developed an understanding of working with multiple representations and were able to make connections among concepts and the use of concrete representations. Teachers also developed their lesson plans effectively to involve a variety of teaching methods and multiple representations, despite the limited time available to them. Moreover, teachers used different modes of representation to improve learner engagement in learning activities. Lastly, teachers used multiple representations to teach in ways that improved the learners’ conception of fractions. On the basis of this research, it can be concluded that in-service workshops for teachers on the integration of multiple representative tools in the teaching of ‘Grades 5 – 7’ fractions could provide a valuable contribution to further developing the teaching of fractions in schools.
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- Date Issued: 2016
Investigating the effectiveness of microcatchments at enhancing transplant performance in Nama-Karoo riparian ecosystem restoration
- Authors: Jackson, Andrew St. John , Wigley, Benjamin , Schumann, Bonnie , Currie, Bianca
- Date: 2016
- Subjects: Arid regions agriculture , Environmental degradation , Range ecology
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/7469 , vital:21782
- Description: Globally agricultural rangelands have been subjected to degradation through over-utilization. The loss of productivity of agricultural rangelands around the world has led to the development of methods to restore the productivity of these areas. In South Africa, extensive areas of the Nama-Karoo have been degraded or transformed due in part to unsustainable agricultural activities. The development of restoration methods which are easily implementable and financially viable could increase the probability of stakeholders implementing restoration activities on privately owned land. The removal of the degrading factor is not sufficient to reverse the degradative trend in dryland environments. Active measures must be implemented to arrest the degradation cascade. The climatic conditions of the rangelands of South Africa are limiting to plant performance and the favourable conditions are sporadic. The translocation of plants should be combined with the amelioration of the local conditions. This study tested the restoration technique of microcatchments in association with plant translocation. The effects of microcatchments and planting combinations which were best suited to the survival and performance of the transplants were determined through a field trail. The results showed that microcatchments created microsites which were conducive to transplant survival and growth, including nutrient accumulation and increased soil moisture. The success of the method was dependent on the planting combination used. Plants which are adapted to inundation and the saline conditions of the site performed better. Plants which were older at the time of translocation had higher survival rates than younger transplants. In the conditions of this site, planting adjacent to the microcatchments was necessary to avoid inundation induced mortalities. The environmental conditions of the Nama-Karoo necessitate the coordination of restoration activities with the predicted favourable conditions in order to improve the success of restoration activities.
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- Date Issued: 2016
Investigating the effects of mopane worms (Imbrasia belina) on nutrients, Venetia-Limpopo Nature Reserve, South Africa
- Authors: De Swardt, Donovan Barry , O’Connor, Tim
- Date: 2016
- Subjects: Herbivores -- Ecology -- South Africa -- Limpopo , Phytophagous insects -- South Africa -- Limpopo , Mopane worm -- South Africa -- Limpopo , Soil fertility -- South Africa -- Limpopo
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/9273 , vital:26558
- Description: Ecologists have long been aware that large mammalian herbivores can alter ecosystem functioning in various ways, for example through changing where they defecate and urinate, which consequently affects nutrient cycling. The effects of herbivorous insects on ecosystems, however, have received limited attention until recently. Insects are capable of mass outbreaks, they can consume large volumes of vegetative material and can deposit large quantities of dung (frass), one example being the mopane worm, Imbrasia belina. This study looked at the effect of mopane worm frass on soil fertility in the mopane veld of the Venetia-Limpopo Nature Reserve and neighbouring Haakdoring farm. It found that mopane worms are capable of altering soil nutrient dynamics beneath the trees where they are browsing in three ways. Firstly, they increase the potential amount of nutrients deposited when compared with that deposited through conventional leaf litter. Secondly, they alter the rate of nutrient recycling by depositing nutrients in frass which decomposes more rapidly than conventional leaf litter. Lastly, they increase the amounts of potassium and phosphorus in the soil. While there is no conclusive data from this study that the mopane veld would become extinct if mopane worms were harvested to extinction, it has shown that there is relatively little evidence on how herbivorous insects could affect ecosystem functioning in the landscapes in which they occur. Further research is recommended that investigates how mopane worms influence soil fertility in more detail and over multiple geographical locations.
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- Date Issued: 2016
Investigating the high level of consumer indebtedness in the South African retail market
- Authors: Kgomo, Stephen Phuti
- Date: 2016
- Subjects: Consumer credit -- South Africa , Debt -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/8450 , vital:26360
- Description: This study was aimed at investigating the high level of consumer indebtedness in the South African retail market more specifically factors that contribute to consumer indebtedness. Recommendations on how to control the level of consumer indebtedness are also presented. Consumer indebtedness is a problem in many countries around the world and as witnessed during the 2008 global financial crisis, its impact can be disastrous. Not only does it create problems for the families but also for a country and even to the extent of the whole world. The literature conducted did not reveal a study undertaken to investigate factors that impact consumer indebtedness. Eight factors were identified and explored further in this study. Results were analysed in chapter three and outcomes presented in chapter four. The method used in conducting this study is the quantitative method. A questionnaire was developed based on the literature review conducted. The questionnaire was a five point Likert scale and was distributed to the respondents in the southern area of Tshwane Municipal district. In view of a manageable number of responses, results were analysed using an excel spreadsheet. Results were verified by an independent expert. From the eight factors that are identified, one (easy access to credit) was found to impact the high level of consumer indebtedness. Although there are other weaknesses, easy access to credit is found to be the main contributor. Recommendations on the findings are presented in chapter five of this study.
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- Date Issued: 2016
Investigating the manufacturing of consent and democratic resistance through legacy and new media, in relation to fracking
- Authors: Roodt, Jean-Pierre
- Date: 2016
- Subjects: Press and propaganda , Press and politics , Mass media
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/3665 , vital:20451
- Description: This dissertation concerns the extent to which the propaganda model advanced by Noam Chomsky and Edward Herman in their Manufacturing Consent: The Political Economy of the Mass Media is still applicable to the current media ecosystem, where both legacy and new media converge, especially given the emergence of global democratic resistance both to the excesses of neoliberalism in general, and to the problems associated with shale gas mining through hydraulic fracturing (or fracking) in particular. In this regard, firstly, the tensions between the views of seminal propaganda theorists and of critical theorists opposed to propaganda will be thematized in relation to Chomsky and Herman’s propaganda model, through which they sought to account for the negative impact of neoliberalism on journalistic freedom. Secondly, the primary features of neoliberalism will be considered in relation to the advent of the Internet, which has helped spread laissez-faire capitalism globally, both through integrating financial markets and augmenting consumerism, and through facilitating new practises of consent engineering via digital forms of censorship and surveillance. Thirdly, the correlative emergence around the world of digital democratic resistance on the part of new social movements and through both new and legacy media means, to the excesses of neoliberalism in general, will be investigated. Fourthly, the corporate underpinning of fracking in the United States will be explored, along with the media strategy by which anti-fracking groups – following Vera Scroggins’s activism – have contested government endorsement of such resource extraction. Fifthly, the resonances/dissonances between the media strategies of the American anti-fracking movement and the South African anti-fracking movement – most notably the Treasure the Karoo Action Group (TKAG) – along with the different contexts out of which they emerged and their respective efficacy, will be examined. Finally, some potential deficits in the TKAG media strategy will be identified, and appropriate recommendations will be made.
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- Date Issued: 2016
Investigating the role of Hsp90 and LRP1 in FN matrix dynamics
- Authors: Boël, Natasha Marie-Eraine
- Date: 2016
- Subjects: Extracellular matrix , Molecular chaperones , Heat shock proteins , Cancer , Fibronectins
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/2713 , vital:20319
- Description: Fibronectin (FN), a matrix protein responsible for regulating processes including migration and differentiation, is secreted as a soluble dimer which is assembled into an insoluble extracellular matrix. The dynamics of FN matrix assembly and degradation play a large role in cell migration and invasion contributing to the metastatic potential of cancer cells. Previous studies from our group have shown the direct binding of Hsp90 and FN in vitro and that inhibition of Hsp90 with novobiocin (NOV) caused internalisation of the FN matrix. However, the receptor mediating this internalisation is currently unknown. Low density lipoprotein 1 (LRP1) is a likely candidate as it is a ubiquitous receptor responsible for regulating internalisation of diverse ligands and is known to bind both Hsp90 and FN. We used wild type and knockout LRP1 cell lines to study the endocytosis of FN via this receptor. Here, we demonstrate that LRP1-deficient cells accumulated greatly increased levels of FN and were found to be less sensitive to pharmacological inhibition of Hsp90 by NOV. LRP1-expressing MEF-1 and Hs578T breast cancer cells experienced an increase in total FN in response to NOV, at concentrations below the EC50 value, followed by a dose-dependent loss of FN. We attributed greater FN levels to a loss of extracellular FN matrix coupled with increased internalisation of FN. Cell-surface biotinylation and DOC assays showed that loss of extracellular FN was specific to LRP1-expressing MEF-1 cells. Furthermore, we demonstrate that the loss of extracellular FN is not affected by changes in FN mRNA levels as determined by qRT-PCR, and that treatment with NOV resulted in the accelerated degradation of FN in the presence of cycloheximide. Immunoprecipitation studies reveal a putative complex exists between FN, Hsp90 and LRP1 in both cancer and non-cancer cells which is not perturbed by NOV. Western analyses revealed increased proteolytic processing of LRP1 in response to NOV which we proposed, based on literature, to modulate signalling pathways as a potential mechanism for regulating FN turnover. Moreover, using wound healing assays we identified increased migration to be one of the consequences associated with loss of extracellular FN by Hsp90 inhibition but only in cells containing LRP1. In summary, this study provides new insights into the Hsp90-LRP1 mediated loss of FN matrix and also reveals for the first time the functional consequence related to FN turnover by NOV was an increase in migration in LRP1-expressing cells.
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- Date Issued: 2016
Investigating the use of Arbuscular Mycorrhizas and Plant Growth Promoting Bacteria to improve the drought tolerance of maize (Zea mays L.)
- Authors: Moore, Nicolle Maureen
- Date: 2016
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/54587 , vital:26591
- Description: Maize (Zea mays L.) is a direct staple food crop in Africa and remains an essential component of global food security, with maize crops accounting for over 60% of the total harvested area of annual food crops. Stress caused by drought and high soil salinity limits crop growth and productivity more than any other single environmental factor, with grain yield reductions up to 76% depending on the severity of the drought and the plant growth stage. Arbuscular mycorrhizal (AM) fungi and Plant Growth Promotion Rhizobacteria (PGPR) have previously been shown to improve tolerance of plants to drought stress through a number of chemical and physiological processes. The aim of this investigation was to determine whether mycorrhizal fungi and rhizobacteria adapted to drought and saline conditions and possessing plant growth promoting (PGP) traits were able to stimulate plant growth responses when applied to Zea mays seeds growing under greenhouse conditions Bacterial isolates selected were tolerant to concentrations of NaCl up to 600 mM and maintained 50% growth at low water potentials (-1.44 MPa). They were positive for Indole Acetic Acid (IAA) production, phosphate solubilisation and secretion of siderophores. Bacterial isolates showing plant growth promoting potential were identified using 16S rDNA gene sequencing as Achromobacter xylosoxidans strains A8 and C54 and Klebsiella oxytoca strain M1. Mixed inoculum was prepared from indigenous communities of mycorrhizas in soils sampled from the Cerebos Salt Pan and the Kalahari Desert. Mycorrhizal diversity was investigated using 454-Pyrosequencing which revealed that the community composition was dominated by species in the Ambispora, Glomus and Paraglomus genera with a rare component represented by species in the Redeckera, Archaeospora and Geosiphon genera. Microscopic examination of plant roots at the end of the trial revealed the presence of diagnostic mycorrhizal structures within the root cells, confirming that colonization was successful. Plant growth response to microbial inoculation was assessed by monitoring changes in plant photosynthetic capacity over the duration of a 7 week pot trial. A significant difference in photosynthetic and biomass data was observed between drought and well-watered groups but no mycorrhizal or bacterial treatment effect was evident within the groups, despite the high levels of colonization by mycorrhizas. These results suggest that the beneficial effects of mycorrhizal colonization may be primarily attributed to improved nutrient and mineral uptake in conditions where nutrients are limiting, resulting in improved growth. The improved growth may then have secondary effects on the plant‟s ability to withstand drought. Having controlled for nutrient deficiency, it was not evident in this study that mycorrhizal fungi were able to stimulate a change in plant physiology and confer drought tolerance under the conditions imposed.
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- Date Issued: 2016
Investigating youth perceptions of youth participation in development: a focus on community engagement as a platform for youth/student participation at Rhodes University
- Authors: Dano, Nqaba
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/1444 , vital:20058
- Description: The main objective of the study is to investigate youth perceptions of youth participation in development with a focus on the Rhodes Community Engagement programme as a platform for youth participation. The study was inspired by trying to locate the position that youth put themselves in when they regard their own participation in development. It was further motivated by trying to gain perspectives from the youth themselves because most discourses on youth rarely feature their own voices. The study utilized a qualitative methodology with an interpretive paradigm, which used semi-structured in-depth interviews as a method of data collection. The theoretical framework used was the notion of participatory development. The literature consulted was broken up into participation in development which looked at the history of participation and the need for participation, the importance of participation and the limits of participation and the type of participation. It looked at youth participation, the definition of youth as a group in society and the discourses that surround how youth are defined; lastly it looked at community engage in higher education, the role students place in community engagement and the nature of Rhodes Community engagement. The data was discussed and analysed following the above mentioned themes which were participation in development, youth participation and community engagement. From the data collected it was made evident that if youth are given more spaces and chances to actively participate they could challenge prominent discourses that treat them as irresponsible minors and exclude them from decision-making processes that directly affect them and the society within which they live.
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- Date Issued: 2016
Investigation of α-aryl substituted 3-indolylethanones as potential antiplasmodial agents
- Authors: Svogie, Archibald Lesley
- Date: 2016
- Language: English
- Type: text , Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10962/55487 , vital:26704
- Description: According to the World Health Organisation (WHO), deaths attributed to Plasmodium falciparum exceeded 584 000 in 2013, with 198 million new cases of malaria being reported. One contributing factor to these alarming figures is the emergence of drug resistance against available antimalarial agents. Therefore, there is a pressing need to develop new therapeutic antimalarial drugs with novel mechanisms of action in order to curb the increasing spread of malaria. The indole scaffold is often associated with biologically active compounds, recently exemplified by the antimalarial agent NITD609, which is currently in phase 1 clinical trials. Based on the biological evaluation of a small series of indolyl-3-amides and esters which showed moderate antimalarial activity, coupled to significant toxicity, we were prompted to investigate the synthesis of a series of indolyl-3-ethanone-α-amines (3.37 and 3.41), ethers (3.39 and 3.44) and thioethers (3.42, 3.43, 3.40, 3.45 – 3.73), where the carbonyl moiety and respective heteroatom were separated by a methine spacer. We further investigated these compounds for in vitro biological activity against P. falciparum and a human HeLa cell line. Our study explored the synthetic pathway of a three-step procedure toward our target compounds, with the initial Friedel-Crafts acetylation of indole, followed by α-bromination of the respective 3-acetylindoles. Finally, the halogen of the α-bromo ketone was substituted with an appropriate nucleophile, to yield our desired compounds. Various reagents were explored to optimise the nucleophilic displacement step, including potassium carbonate and various silver containing compounds. While many of the silver salts were found to assist in nucleophilic substitution, none were superior to the addition of potassium carbonate. The majority of compounds, chiefly the thioethers, displayed promising antimalarial activity, against the chloroquine sensitive 3D7 P. falciparum strain, with two thioethers in particular (3.54 and 3.65) inhibiting P. falciparum in the low nanomolar range. Additionally, active compounds were generally found to be non-toxic against HeLa cells, indicating that indolyl-3-thioethers are selective for the malaria parasite. These findings allowed us to begin hypothesising a structure activity relationship of this class, as well as elucidating the possible pharmacophore. In a speculative attempt to uncover the possible mechanism of action of these active compounds, in silico docking studies were conducted against Staphylococcus aureus HPPK (PDB ID: 4CRJ), which is an enzyme that immediately precedes DHPS in the microbial folate biosynthesis. Inhibition of folate biosynthesis is a validated selective antimalarial pathway and HPPK also exists in P. falciparum. Results from these docking studies suggested that our inhibitors bound well in the HPPK ATP pocket and were supportive of our hypothesized structure activity relationship.
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- Date Issued: 2016