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Manufacturing of continuous flow equipment

  • Authors: Strydom, Martin
  • Date: 2018
  • Subjects: Microfluidics , Nanofluids Micro-reactor
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/35818 , vital:33850
  • Description: For the work of this thesis a proof of concept microreactor and pump have been designed. Open source technology was used where possible to reduce the manufacturing cost. The pump is a pseudo HPLC/Syringe pump hybrid which adopts designs from both pumping systems. It works by charging two volumes of liquid into the primary chamber while the secondary chamber discharges. When the charge of the primary chamber is complete half of the liquid is pumped into the secondary chamber and the other half gets discharged. This has the benefit of sharing a common drive to reduce cost. The pump did function; however, the 3D printed parts did not have sufficient rigidity to offset mechanical stress, thus flexing occurred. The micro-reactor that was developed, was unique to commercial units. It was not chemically or thermally bonded but clamped with a gasket sealing the channels. This provides the advantage of unblocking inert material in the reactor. The reactor disk that was clamped was a super alloy, namely, Hastelloy C276. The reactor was tested against two commonly used reactors, namely, Chemtrix3227 and Little Things Factory (MS+VS). A simple synthesis of ethyl acetate has been used as a model reaction for comparing. The test reactor did not perform as well as the commercial counterparts, however probable causes have been identified for potential future work. Both the pump and the reactor worked as a proof of concept system, however further development is required for commercialisation.
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  • Date Issued: 2018

Teachers' support of learners with attention deficit hyperactivity disorder (ADHD) in mainstream grade 10 classes: a case study

  • Authors: Hendriks, Ivy Johleen
  • Date: 2018
  • Subjects: Attention-deficit-disordered children -- Education (Higher) , Hyperactive children -- Education (Higher)
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10353/9033 , vital:34184
  • Description: Attention Deficit Hyperactivity Disorder (ADHD) affects between 5 – 7 percent of children in the United States and Europe, making it one of the most common child psychiatric diagnoses. ADHD currently affects approximately 3 – 5 percent of school-going children and adolescents in South Africa. Schools create multiple challenges for learners with ADHD who show classic symptoms of inattention, hyperactivity and impulsivity. These symptoms produce impairment across cognitive, behavioural and interpersonal domains of function. Symptoms frequently manifest in a school setting, thus teachers play a central role in reporting symptoms, advising parents to seek professional assessment and assisting children with ADHD to achieve academically and socially. In line with the Education White Paper 6 of 2001, teachers should not only support learners with ADHD, but need to help these learners to understand and accept themselves as learners. The Literature focus on teachers’ knowledge of the characteristic symptoms displayed by learners with ADHD; teachers’ role in identifying and referring learners with ADHD; challenges faced by teachers when teaching learners with ADHD as well as teaching strategies and classroom accommodations teachers employ to effectively support learners with ADHD. The research was undertaken as a qualitative case study with an interpretivist underpinning. Data was collected making use of open-ended questionnaires, semi structured interviews and an informal observation. Purposive sampling was used to identify 6 teachers from previously disadvantaged high schools, teaching either Mathematics or a Language. The findings of the study indicated that teachers in mainstream high schools do not possess adequate knowledge to identify and refer learners with ADHD. As assumed by the researcher, the teachers’ lack of knowledge leads to unsuitable teaching strategies and classroom accommodations. Their biggest challenge to effectively support learners with ADHD was a lack of support and knowledge.
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  • Date Issued: 2018

The mangroves of Mozambique: pathways to conservation through integrated management

  • Authors: Macamo, Célia , Bandeira, Salomão
  • Date: 2018
  • Subjects: Mangrove ecology -- Mozambique , Mangrove conservation -- Mozambique
  • Language: English
  • Type: Thesis , Doctorate , Dphil
  • Identifier: http://hdl.handle.net/10948/30843 , vital:31182
  • Description: This study analyses the status and management of mangroves in Mozambique and how the management system addresses the threats to mangrove conservation. A comprehensive analysis of the country forest condition and management status was conducted based on a literature review and informal interviews with key informants. GIS and remote sensing techniques combined with groundtruthing were used to assess the impact of natural and human threats on mangroves based on changes in NDVI (Normalised Difference Vegetation Index) and cover area. These studies were conducted at the Save River and Cabo Delgado province, respectively. Structural data of the mangrove forest were collected during field visits to assess changes in structural parameters and compare impacts in different forests or locations within the same forest. Finally a community-based management system in Nhangau (Sofala province) was analysed in order to assess the efficacy as a management tool to meet mangrove conservation objectives. Mozambique has an estimated mangrove cover area of 3 054 km2. In general there is a trend of decrease in cover around major human settlements, while remote areas show an increase in cover as documented in Maputo Bay (175.96 km2, decreasing within Maputo town) and Zambezi Delta (370.34 km2, increasing), respectively. Mangroves are mostly used for wood resources, salt production and fishing grounds. However, urban development, saltpans, logging and natural phenomena such as floods and cyclones are a threat to these systems. Mozambique has 27% of its mangroves protected in conservation areas. At places like the Quirimbas National Park, this protection is not effective due to illegal cutting and poor enforcement. The Mozambican institutional and legal frameworks provide protection to mangroves at all levels and prohibit all forms of degradation and unsustainable use. However law enforcement and institutional functioning is weak. There is also a need to update the legislation by adding specific aspects related to mangroves, such as regulating invertebrate collection and defining customary use. At the Save River changes in NDVI indicated that 63.42 km2 of mangrove (47.8%) were affected by cyclone Eline. Field investigations 11 years after the cyclone showed that there was substantial recovery in the protected creek forest but changes in sedimentation prevented recovery in the seaward sites that are exposed to storm surges and wind. This study highlighted the necessity for field based investigations in addition to remote sensing as results showed site specific differences. The percentage of living trees at the creek forest ranged from 71 to 97% from the outer to inner forest. Also species density was higher at the creek sites from the outer (101 ± 63 tree/ha) to inner forest (488 ± 111 trees/ha) as was the complexity index (0.09 to 0.25 respectively). At the seaward forest the percentage of living trees increased from 0 to 79% from the outer to inner forest. Seedlings (up to 40 cm height) dominated the understory throughout the forest however the outer edge of the seaward forest had no regeneration at all. This forest recovered naturally from the cyclone, however it is important to maintain low exploitation levels to ensure forest resilience in case of similar future impacts. The frequency and intensity of cyclones is expected to increase with climate change and thus the results can contribute to management strategies and climate change adaptation plans. 3 Human impacts were investigated at a peri-urban, rural and island setting in Cabo Delgado province. It was hypothesized that peri-urban forests would be more impacted. However an analysis of LandSat images showed that mangrove cover at the peri-urban site actually increased by 22.7% between 1991 and 2013; while rural forests lost 23.2% of its area during the same period. Field studies showed that there was no significant difference between average tree density for the different sites (p= 0.16) and the low complexity indices indicated young disturbed forests. At the peri-urban and rural sites, the tree diameter class 5.1-8 cm was targeted for extraction, while at the rural island all size classes were targeted. The proportion of stump:living trees was 1:11 at the peri-urban site; 1:9 at the rural site and 1:4 at the rural island. Most of the standing trees were crooked and not suitable for building purposes. The small extractive use of mangroves at the peri-urban site could be related to the fact that the dominant ethnic group has kept its essentially agricultural habits while at the rural site the people are typically fishermen and marine invertebrate collectors that rely on mangroves and marine resources for their livelihoods. Proposed management measures for these sites include raising awareness at all sites and conducting mangrove restoration at the peri-urban (abandoned saltpans and aquaculture farm) and rural sites. A community-based management system at Nhangau (Sofala province) was analysed in order to assess how this has achieved management conservation objectives. After facing several impacts due to mangrove degradation, the community of Nhangau engaged in mangrove replanting and management. The main management actions were (1) reduction of extractive uses, (2) continuous awareness and mangrove planting and (3) law enforcement. The restoration interventions started in the late 1990s by the local government in partnership with the local community and NGOs. Currently (2018), most of the activities are led by the local Natural Resources Management Committee (NRMC). Ten hectares of mangrove were planted between 1996 and 2017, and according to the local community the restored areas are already providing important ecological services such as temperature regulation. There are several challenges such as, limited functionality of the NRMC and its interaction with other stakeholders, Government representatives and local NGOs. There is also a lack of alternative livelihoods for mangrove cutters and the wider Nhangau community. Improvements to the system include better integration of local government representative structures with the civil society organizations (NGO and NRMC), law enforcement, financing of the appropriate sustainable use practices, environmental awareness and education and the promotion of appropriate NRMC functionality and representation. With these improvements this community-based management system can be effective as a management tool to meet mangrove conservation objectives and serve as a replicable model for other parts of the country. In conclusion, this research has documented both anthropogenic and climate-related impacts on mangroves in Mozambique and highlighted options for mangrove management focusing at strengthening the community –based management of mangroves in rural sites. Mangrove management would improve significantly by strengthening the legislation on specific mangrove issues combined with law enforcement and better community organization and their training and sensitization to manage mangrove resources at the local level. Such actions will increase the resilience of forests, allowing sustainable use and faster recovery in case of impacts by either anthropogenic or natural factors such as cyclones.
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  • Date Issued: 2018

An evaluation of sampling and statistical methods for long-term monitoring of subtidal reef fishes : a case study of Tsitsikamma National Park marine protected area

  • Authors: Parker, Denham
  • Date: 2016
  • Subjects: Reef fishes -- South Africa -- Monitoring , Tsitsikamma National Park (South Africa)
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5385 , http://hdl.handle.net/10962/d1019991
  • Description: Tsitsikamma National Park (TNP) possesses the oldest (established 1954), and one of the largest (350 km2) ‘no-take’ marine protected areas (MPA) in South Africa. A long-term monitoring (LTM) programme to observe the subtidal reef fishes in the TNP MPA was established in 2007. To date, 243 angling replicates have been completed, and a total of 2,751 fish belonging to 41 different species have been caught and released. In an era of unprecedented global biodiversity loss, data that can be used to monitor ecosystems and gauge changes in biodiversity through time are essential. This thesis aims to improve the methodological and statistical processes currently available for LTM of subtidal reef fish by providing an evaluation of the TNP MPA LTM programme. Angling data revealed definitive spatial structuring, in the form of spatial autocorrelation, and a shift in viewing spatial dependency as a statistical obstacle to a source of ecological information created a new avenue of data inference. Species-specific distribution maps identified localized habitat as the main predictor variable for species abundance, emphasizing the need for accurate a priori bathymetric information for subtidal monitoring. ‘Random forest’ analyses confirmed spatial variables are more important than temporal variables in predicting species abundance. The effectiveness of Generalized Linear Mixed Models (GAMMs) to account for spatial autocorrelation was highlighted, and evidence that disregarding spatial dependencies in temporal analyses can produce erroneous results was illustrated in the case of dageraad (Chrysoblephus cristiceps). Correlograms indicated that the current sampling strategy produced spatially redundant data and the sampling unit size (150 m2) could be doubled to optimize sampling. Temporal analyses demonstrated that after 50 years of ‘no take’ protection the TNP MPA ichthyofauna exhibits a high level of stability. Species-specific size structure was also found to be highly stable. Dageraad was the only species to exhibit a definitive temporal trend in their size structure, which was attributed to recruitment variation and the possibility that large individuals may migrate out of the study area. The inadequacy of angling as a method for monitoring a broad spectrum of the fish species was highlighted, particularly due to its selectivity towards large predators. As a result, a new sampling technique known as Stereo Baited Remote Underwater Videos (stereo-BRUVs) was introduced to the LTM programme in 2013. Stereo-BRUVs enabled sampling of 2640 fish belonging to 52 different species, from 57 samples collected in less than two years. A comparison of the sampling methods concluded that, compared to angling, stereo-BRUVs provide a superior technique that can survey a significantly larger proportion of the ichthyofauna with minimal length-selectivity biases. In addition, stereo-BRUVs possess a higher statistical power to detect changes in population abundance. However, a potential bias in the form of ‘hyperstability’ in sites with unusually high fish densities was identified as a possible flaw when using stereo-BRUVs. In an attempt to provide a more rigorous method evaluation, simulation testing was employed to assess the ability of angling and stereo-BRUVs to accurately describe a decreasing population. The advantage of this approach is that the simulated population abundances are known, so that each sampling method can be tested in terms of how well it tracks known abundance trends. The study established that stereo- BRUVs provided more accurate data when describing a distinct population decline of roman (Chrysoblephus laticeps) over 10- and 20-year periods. In addition, spawner-biomass was found to be a more accurate population estimate than relative abundance estimates (CPUE and MaxN) due to the inclusion of population size structure information, highlighting the importance of length-frequency data. The study illustrated that an evaluation framework that utilizes simulation testing has the potential to optimize LTM sampling procedures by addressing a number of methodological questions. This includes developing a procedure that aligns data collected from different sampling methods by applying correction factors, thus ensuring LTM programmes are able to adapt sampling strategies without losing data continuity.
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  • Date Issued: 2016

In search of the comprador: self-exoticisation in selected texts from the South Asian and Middle Eastern diasporas

  • Authors: Shabangu, Mohammad
  • Date: 2015
  • Subjects: Rushdie, Salman. Midnight's children -- Criticism and interpretation , Kureishi, Hanif. Buddha of suburbia -- Criticism and interpretation , Hosseini, Khaled. Kite runner -- Criticism and interpretation , Hosseini, Khaled. Thousand splendid suns -- Criticism and interpretation , Compradors , Exoticism in literature , Literature and transnationalism -- Middle East , Literature and transnationalism -- South Asia , Middle Eastern literature (English) -- History and criticism , South Asian literature (English) -- History and criticism
  • Language: English
  • Type: Thesis , Masters , MSocSc
  • Identifier: vital:2328 , http://hdl.handle.net/10962/d1017770
  • Description: This thesis is concerned with transnational literature and writers of the Middle Eastern and South Asian diasporas. It argues that the diasporic position of the authors enables their roles as comprador subjects. The thesis maintains that the figure of the comprador is always acted upon by its ontological predisposition, so that diasporic positionality often involves a single subject which straddles and speaks from two or more different subject positions. Comprador authors can be said to be co-opted by Western metropolitan publishing companies who stand to benefit by marketing the apparent marginality of the homelands about which these authors write. The thesis therefore proceeds from the notion that such a diasporic position is the paradoxical condition of the transnational subject or writer. I submit that there is, to some degree, a questionable element in the common political and cultural suggestions that emerge upon closer evaluation of diasporic literature. Indeed, a charge of complicity has been levelled against authors who write, apparently, to service two distinct entities – the wish to speak on behalf of a minority collective, as well as the imperial ‘centre’ which is the intended interlocutor of the comprador author. However, it is this difference, the implied otherness or marginality of the outsider within, which I argue is sometimes used by diasporic writers as a way of articulating with ‘authenticity’ the cultures and politics of their erstwhile localities. This thesis is concerned, therefore, with the representation of ‘the East’ in four novels by diasporic, specifically comprador writers, namely Salman Rushdie’s Midnight’s Children, Hanif Kureishi’s The Buddha of Suburbia, and Khaled Hosseini’s The Kite Runner and A Thousand Splendid Suns. I suggest that the ‘third-world’ and transnational literature can also be a selling point for the transnational subject, whose representations may at times pander to preconceived ideas about ‘the Orient’ and its people. As an illustration of this double-bind, I offer a close reading of all the novels to suggest that on the one hand, the comprador author writes within the paradigm of the ‘writing back’ movement, as a counter-discourse to the Orientalist representations of the homeland. However, the corollary is that such an attempt to ‘write back’, in a sense, re-inscribes the very discourse it wishes to subvert, especially because the literature is aimed at a ‘Western’ audience. Moreover, the template of the comprador could be used to explain how a transnational post-9/11 text from an Afghan-American, for instance, may be put to the service of the imperial machine, and read, therefore, as a supporting document to the U.S. policy on Afghanistan.
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  • Date Issued: 2015

A critical assessment of developmental local government and its relevance to the democratic South Africa: A case study of Amathole District Municipality

  • Authors: Mbambo, W B
  • Date: 2014
  • Language: English
  • Type: Thesis , Masters , M Admin
  • Identifier: http://hdl.handle.net/10353/1085 , vital:26525
  • Description: The notion of developmental local government has become part of the South African local government dispensation as from the year 2000. According to Smith and Vawda (2003:28) the idea of developmental local government (DLG) emerged from the fusion of the social interventionist goals of the Reconstruction and Development Programme (RDP) and the market driven economic strategies of the Growth Employment and Redistribution policy (GEAR); the two main national policies of the post-apartheid era for addressing economic growth and poverty eradication. The RDP and GEAR represented different visions for how to bring about equity and redistribution in a deeply divided state and economy. In itself South Africa as a state has 283 municipalities which are wall to wall in terms of demarcation. However, despite the fact that local democracy is deeply entrenched in South African society and furthermore, a very futuristic local government policy framework has been introduced, there is no guarantee that the new local government system will be financially viable and capable of discharging its democratic and developmental mandate. There are major challenges that have to be addressed, namely promoting job-creation, local economic development, capacity development and civic education which, in the final analysis, will ensure that the concept of developmental local government becomes a reality for the majority of South Africans.
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  • Date Issued: 2014

Development of an ionospheric map for Africa

  • Authors: Ssessanga, Nicholas
  • Date: 2014
  • Subjects: Ionosondes Ionosphere Ionosphere -- Observations Ionosphere -- Research -- Africa Ionospheric electron density -- Africa Ionospheric critical frequencies
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5519 , http://hdl.handle.net/10962/d1011498
  • Description: This thesis presents research pertaining to the development of an African Ionospheric Map (AIM). An ionospheric map is a computer program that is able to display spatial and temporal representations of ionospheric parameters such as, electron density and critical plasma frequencies, for every geographical location on the map. The purpose of this development was to make the most optimum use of all available data sources, namely ionosondes, satellites and models, and to implement error minimisation techniques in order to obtain the best result at any given location on the African continent. The focus was placed on the accurate estimation of three upper atmosphere parameters which are important for radio communications: critical frequency of the F2 layer (foF2), Total Electron Content (TEC) and the maximum usable frequency over a distance of 3000 km (M3000F2). The results show that AIM provided a more accurate estimation of the three parameters than the internationally recognised and recommended ionosphere model (IRI-2012) when used on its own. Therefore, the AIM is a more accurate solution than single independent data sources for applications requiring ionospheric mapping over the African continent.
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  • Date Issued: 2014

The importance's of the physical analogue clock in mediating learning of analogue clock time in Grade 4 learners

  • Authors: Metelerkamp, Roger Gregory
  • Date: 2014
  • Subjects: Clocks and watches , Mathematics -- Study and teaching (Elementary) , Time measurements -- Study and teaching (Elementary)
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1986 , http://hdl.handle.net/10962/d1013169
  • Description: My research topic concerns how learners use the analogue clock (as a human tool) to make meaning of clock time. This study is informed by a Vygotskian socio-cultural framework to learning and development based on the concept that human activities take place in cultural contexts and is mediated by tools. In this qualitative study I report on the learners meaning making of analogue clock time using the physical clock. This study was carried out at a South African primary school through an intervention programme after school. The research employed a case study method. It involved a purposeful sample of 4 learners (n=38) from the grade four class group based on their response to a baseline assessment task. The selected sample of learners included learners across the ability spectrum to gain rich insight into how learners make meaning of analogue clock time. Data collection and analysis was done through an interpretive approach. The video-taped interviews and intervention programme was my main instrument of data collection. Other research instruments included document analysis of responses to baseline assessment tasks. These research tools yielded the data collected and also allowed for triangulation. My research topic explored how the learners make meaning of analogue clock time. In particular the two-way movement of how the learners use the physical tool namely the analogue clock to develop meaning and how the clock mediates clock knowledge in return. The findings of the study suggest that learners’ find it difficult to conceptualise analogue clock symbols and signs, in particular, in Afrikaans the half hour concept, in relation to the two hands. The physical analogue clock is also important to support and extend clock knowledge in solving time-related problems. This shows the power of the analogue clock to mediate meaning making of clock time in young learners. Because of its potential to improve teaching and learning analogue clock time in primary school it is therefore recommended that the analogue clock time be further researched in South Africa.
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  • Date Issued: 2014

The relationship between service quality, customer satisfaction and customer loyalty in the retail supermarket industry

  • Authors: Ndhlovu, Thinkwell
  • Date: 2014
  • Subjects: Consumer satisfaction , Customer loyalty , Customer services -- Rating of , Customer services -- Quality control , Relationship marketing , Supermarkets -- South Africa -- Grahamstown
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1202 , http://hdl.handle.net/10962/d1013221
  • Description: The increasingly competitive business environment has influenced contemporary organisations to build mutual beneficial relationships with their customers indicating a paradigm shift from transactional marketing. In order to compete in this intense competitive environment, organisations are creating competitive advantage over their rivals through service quality that will influence customer satisfaction which subsequently leads to customer loyalty. Service quality has been found to be the key strategy of success and survival for most organisations like retail supermarkets who want to win the loyalty of their customers because of its positive effect on customer satisfaction. The purpose of this research was to determine the relationship between service quality, customer satisfaction and customer loyalty in the retail supermarket industry. An empirical study was conducted in Grahamstown between two main supermarkets through a survey that determined customers’ perceptions on service quality, customer satisfaction and customer loyalty respectively. The empirical findings of this research study revealed that moderate to strong positive linear relationships exists between the dimensions of service quality (namely physical aspects, reliability, personal interaction, problem solving and policy) and customer satisfaction at the 5% level of significance. Furthermore, this study showed that dimensions of service quality (namely physical aspects, reliability, personal interaction and problem solving) have weak negative linear relationships with price sensitivity dimension of customer loyalty. The study further showed that the dimensions of service quality (namely physical aspects, reliability, personal interaction, problem solving and policy) have weak to moderate positive linear relationships with the purchase intentions dimension of customer loyalty. In addition, all the dimensions of service quality (namely physical aspects, reliability, personal interaction, problem solving and policy) showed moderate positive linear relationships with word of mouth communication dimension of customer loyalty. A weak negative linear relationship between price sensitivity dimension of customer loyalty and customer satisfaction was revealed in this study. Purchase intentions dimension of customer loyalty was also found to have a moderate positive linear relationship with customer satisfaction. In addition, word of mouth communication dimension of customer loyalty showed a strong positive linear relationship with customer satisfaction. There is sufficient evidence that the customers of the two supermarkets in this study have different perceptions on problem solving dimension of service quality. This study further provides sufficient evidence of the significant difference between gender on the levels of customer satisfaction. In addition, this study showed that customers of various levels of education and occupations differ in price sensitivity dimension of customer loyalty. The average scores for word of mouth communication, purchase intentions and price sensitivity dimensions of customer loyalty were found to be significantly different between the two supermarkets investigated in this study. Therefore, for supermarkets to compete effectively in the intense retail supermarket industry in South Africa they have to manage their service quality dimensions so as to influence customer satisfaction and customer loyalty respectively.
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  • Date Issued: 2014

Unearthing the essence of nature and the perception of the natural landscape among the amaXhosa in the Eastern Cape : an exploratory study

  • Authors: Mogano, Lydia Lehlogonolo
  • Date: 2013
  • Subjects: Xhosa (African people) -- South Africa -- Eastern Cape Conservation of natural resources -- South Africa -- Eastern Cape Biodiversity conservation -- South Africa -- Eastern Cape Cultural pluralism -- South Africa -- Eastern Cape Human-plant relationships -- South Africa -- Eastern Cape Human ecology -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:1072 , http://hdl.handle.net/10962/d1007742
  • Description: The recognition of the close link between the lifestyles of 'indigenous' and 'local' people and biodiversity is widely acknowledged as crucial, not only for the survival of biological diversity but also for the protection of cultural diversity. Most discussions centre on the argument that cultural diversity can, through a wide variety of uses and practices, sustain and conserve biodiversity, particularly in many developing countries. However, local people's relationship with natural landscapes and the extent to which they value biodiversity has not been fully explored and is in most cases misunderstood, which in fact undermines the bio-cultural diversity link. This misunderstanding exists primarily because the majority of environmental or ecological research conducted so far has been oriented towards economic valuation, in quantifying the estimated value of plants and fauna utilised by local people. As a result, biodiversity is primarily treated as a commodity, with wild harvested plant products being classified as either having subsistence, or commercial and medicinal value. This approach is narrow and conceals the critical, profound noneconomic values of biodiversity among local communities in everyday life. Literature indicates that biodiversity and natural landscapes also include less tangible values such as spiritual, cultural, psychological and social values (e.g., sense of place, place attachment, and psychologically restorative effects) which are crucial to human well-being. This suggests that human-nature interaction is complex, and that the meanings and values that people ascribe to natural landscapes cannot be solely reduced to economic values. Nevertheless, to date, studies investigating these less tangible values have received little attention in South Africa. As a result, we have very little understanding of what local and indigenous communities value or appreciate with regard to natural landscapes, beyond their general economic significance. This study seeks to address this particular limitation by exploring non-economic values of natural landscapes and their significances to local people while illuminating the complexities inherent in human-nature interactions. I argue that the purely economic valuation of natural resources is simplistic and biased, and therefore does not represent the complete meaning and significance that natural resources may hold for local communities and households. Therefore, this study takes an innovative psychological approach to explore in detail the everyday lived experiences of the amaXhosa in the Eastern Cape, South Africa. It seeks to investigate the cultural, spiritual, and psychological values that ordinary people attach to natural landscapes in the peri-urban and urban communities of Ndlambe Village l and Grahamstown respectively. This research also aims to study the general perceptions of and meanings ascribed to the natural landscape (referred to by the amaXhosa as ihlathi lesiXhosa). In addition, it carefully integrates the Phenomenological and Transactional approaches to investigate how the amaXhosa engage, interact, and find meaning within the natural landscape. Furthermore, the study explores the impact of such landscape experiences on local people's spiritual and psychological well-being, demonstrating it link to bio-cultural diversity and conservation. The major findings in this study reflect that ihlathi lesiXhosa provides a place for peace and tranquillity to enhance psychological restoration. Moreover, ihlathi contributes towards redefining and strengthening personal and cultural identity; and provides spiritual satisfaction in everyday life. Overall, the findings of this study indicate that i!liathi lesiXhosa plays a profound role in both the personal and social lives of many amaXhosa in the Eastern Cape in that it appears to improve their lives. Therefore, the evidence in this study suggests that, among the amaXhosa, biodiversity and natural landscape management processes should not aim to address and promote ecologicallbiological and economic values in a compartmentalized manner independent of other social, cultural, psychological, and more specifically the spiritual values of these features. An increased understanding of these more intangible values and local people's value system of biodiversity could help towards implementing improved biodiversity conservation and landscape management strategies in South Africa. These insights would not only help us to address the challenges of the previous conservation framework but would also encourage a more inclusive, mutual benefiting process that respects local people's values and needs.
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  • Date Issued: 2013

Shaping public opinion : an investigation of media framing of Trevor Manuel in 1996 and in 2007, in the Financial Mail

  • Authors: Mbunyuza, Lindani
  • Date: 2011
  • Subjects: Mass media -- Public opinion , Mass media -- Influence , Manuel, Trevor A , Financial Mail (Newspaper)
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:8386 , http://hdl.handle.net/10948/1356 , Mass media -- Public opinion , Mass media -- Influence , Manuel, Trevor A , Financial Mail (Newspaper)
  • Description: The discussion that follows seeks to critically examine the manner in which a South African financial publication, the Financial Mail (FM) magazine, reported on the country’s Finance Minister over two time periods. The specific time periods are April – June 1996, and February – April 2007. This will be done to assess whether the style of reporting changed over time. In order to accurately analyse the coverage, a content analysis of a number of articles published by the FM over two periods will be conducted. The first period to be examined correlates with Manuel’s first three months in office (April to June 1996) as finance minister, a role he took over after the resignation of then Finance Minister Chris Liebenberg, and the subsequent cabinet re-shuffle. This time period also coincides with the adoption of the internationally acclaimed South African constitution which pre-supposes, amongst others, freedom of the press. Manuel’s first three months in office furthermore coincided with the African National Congress’ (ANC) first period in government under the stewardship of President Nelson Mandela, having taken over power in 1994. The second time period selected is during Manuel’s 11th year in office (February to April 2007). The second time period coincides with a different economic and social situation, with the country’s economy having strengthened to the extent of recording a budget surplus. Relevant media theories and principles will be studied to evaluate which theories, if any, reflect the Financial Mail’s style of writing, language use and choice of stories to cover regarding Minister Manuel. An analysis of the first time period will include a look at the socio-economic conditions that prevailed at the respective times, against the background of the political situation during both periods. Dominant economic policies implemented and decisions taken during both periods relevant to the particular office Manuel held will be critically examined, since FM is a financial publication mostly covering financial and economic news. Research conducted will be qualitative in nature, and include an in-depth content analysis of articles.
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  • Date Issued: 2011

Business journalism ethics in Africa: a comparative study of newsrooms in South Africa, Kenya and Zimbabwe

  • Authors: Mare, Admire
  • Date: 2010
  • Subjects: Journalism, Commercial Journalistic ethics Journalism, Commercial -- South Africa Journalism, Commercial -- Kenya Journalism, Commercial -- Zimbabwe Business Day (South Africa) Business Daily (Kenya) Financial Gazette (Zimbabwe)
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3458 , http://hdl.handle.net/10962/d1002912
  • Description: This study provides an insight into the state of business journalism ethics in Africa, firstly through an examination of newsroom ethical policies and secondly through an exploration of the way in which African business journalists negotiate ethical decision-making in their day-to-day news processing practices. Thirdly, it examines how the three African media organisations have responded in their newsroom policies and practices to the debates on the Africanisation of journalism ethics. In order to collect data, the researcher employed document analysis, semi-structured questionnaires and in-depth interviews. Three financial newspapers namely: Business Day in South Africa, Business Daily in Kenya and Financial Gazette in Zimbabwe were purposively chosen. In these African countries, business journalism has been steadily growing since the late 1960s, fuelled by the presence of robust stock exchanges, making the issue of business journalism ethics of central importance. Grounded in the sociology of news production paradigm, Bourdieu’s journalistic field theory and debates on Africanisation of journalism ethics, this study identifies three major issues. First, the research found that while all three newspapers had clear ethical guidelines in place, and editors and journalists recognised the importance of ethical behaviour, ethical practice did not always follow. A disconnect exists between words (codes of ethics) and actions (practice) especially in Kenya and Zimbabwe, where business journalists are more susceptible to economic and political pressures. The argument is ethical considerations notwithstanding, people need to survive. This is largely due to the precarious economic basis of news organisations, lack of effective monitoring, and a pervasive culture of unethical behaviour at some sites. Second, the study also shows that institutional factors such as advertising, powerful news sources and interference from senior management make ethical business journalism difficult to practice. Third, Africanisation remains an academic issue with little movement towards that direction in most newsrooms studied. The findings of this study demonstrate that business editors in African newsrooms are confused on what ‘Africanisation’ entails especially given their shared view that journalism practices are universal. It recommends that business journalism codes of ethics informed by African values are long overdue. In terms of enforcement and monitoring of codes, it is important to use compliance officers or ombudsperson and periodically run in-house refresher courses on ethics and professionalism. It is imperative that the financial press improve the working conditions of its employees in order to lessen incidences of corruption which are threatening the credibility of media content and media organisation themselves.
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  • Date Issued: 2010

Lag length selection for vector error correction models

  • Authors: Sharp, Gary David
  • Date: 2010
  • Subjects: Akaike Information Criterion Mathematical models -- Evaluation Autoregression (Statistics) Error analysis (Mathematics)
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5568 , http://hdl.handle.net/10962/d1002808
  • Description: This thesis investigates the problem of model identification in a Vector Autoregressive framework. The study reviews the existing research, conducts an extensive simulation based analysis of thirteen information theoretic criterion (IC), one of which is a novel derivation. The simulation exercise considers the evaluation of seven alternative error restricted vector autoregressive models with four different lag lengths. Alternative sample sizes and parameterisations are also evaluated and compared to results in the existing literature. The results of the comparative analysis provide strong support for the efficiency based criterion of Akaike and in particular the selection capability of the novel criterion, referred to as a modified corrected Akaike information criterion, demonstrates useful finite sample properties.
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  • Date Issued: 2010

Improving academic literacy at higher education

  • Authors: Free, Loretta Dianna
  • Date: 2008
  • Subjects: Literacy -- Study and teaching (Higher) , Information literacy -- Study and teaching (Higher) , Academic writing -- Study and teaching (Higher)
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:9531 , http://hdl.handle.net/10948/839 , Literacy -- Study and teaching (Higher) , Information literacy -- Study and teaching (Higher) , Academic writing -- Study and teaching (Higher)
  • Description: This study is a deliberation on students who advance from high school to a higher education institution, without demonstrating the attributes required on admission. They are granted formal access, despite being underprepared for tertiary studies. One of the qualities that they noticible lack is academic literacy. In the course of this investigation, academics had to relate what their perceptions were of the academic literacy of their students at higher education level. Initially, being literate meant the ability to read and write, but the term literacy has assumed a more varied form. The term multi-literacies is employed now, as there are several forms of literacy. These include, Information Technology, Technology, pictorial and numerical literacies, to name a few. Academic literacy constitutes more than one literacy, namely, operational or functional literacy, cultural literacy and critical literacy. These literacies are elaborated on and the role of language proficiency, together with the inter-relatedness between students' linguistic competence and their cognitive ability are discussed in depth. Alternatives are examined to assess how this problem of the lack of academic literacy can be circumvented and what mechanisms can be put in place in order that students can be assisted in their pursuit of academic literacy.
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  • Date Issued: 2008

The role of experience in the development of bar managers' social competencies

  • Authors: Dhaya, Jateen
  • Date: 2008
  • Subjects: Hospitality Industry -- Management , Bars (Drinking establishments) -- Management , Social skills , Executive ability , Interpersonal communication , Experience
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1177 , http://hdl.handle.net/10962/d1002794 , Hospitality Industry -- Management , Bars (Drinking establishments) -- Management , Social skills , Executive ability , Interpersonal communication , Experience
  • Description: This research study analysed the role that experience played in the development of bar managers’ social competencies. Given the social nature of the bar environment, social competencies were perceived to be essential managerial competencies that enable bar managers to manage employees and consumers to ensure that employee and consumer satisfaction is maintained. The literature reviewed discussed the importance of managerial competencies and the composition of social competencies. Experience was conceptualized to develop an understanding of the informal learning method through which competency development occurs. Data was captured through face-to-face interviews, which were based on the Critical Incident Technique (CIT). The data was analysed using the open coding procedures of grounded theory. This research study proposed a process to explain how experience contributed to the development of social competencies. The proposed process, which is called the Social Competency Cache Development Process (SCCD Process), ultimately indicated that experience contributed to bar managers’ social competencies through a reflection process, the residues of experience, and through the familiarity of situations and results. This research study found that experience contributed to the development of bar managers’ social competencies within a process that established an awareness of unfamiliar social competencies or reinforced the effects of familiar effective social competencies. Experience was also found to promote the transition between novel situations and familiar situations, which in turn enabled bar managers to effectively assess social situations and select effective responses to social situations. Consequently, experience improved the probability of bar managers implementing effective social competencies to ensure employee and consumer satisfaction. In essence, experience shaped bar managers’ accumulation of social competencies by promoting the addition of new social competencies or the reinforcement of existing social competencies.
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  • Date Issued: 2008

A case study of the strategic nature of DaimlerChrysler South Africa's corporate social investment programmes in the local communities of the Border-Kei region in the Eastern Cape Province

  • Authors: Mak'ochieng, Alice Atieno
  • Date: 2004
  • Subjects: DaimlerChrysler , Automobile industry and trade -- South Africa , Economic development -- South Africa -- Eastern Cape , Community development -- South Africa -- Eastern Cape , Economic development projects -- South Africa -- Eastern Cape , Industries -- Social aspects -- South Africa -- Eastern Cape , Social responsibility of business -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1165 , http://hdl.handle.net/10962/d1002781 , DaimlerChrysler , Automobile industry and trade -- South Africa , Economic development -- South Africa -- Eastern Cape , Community development -- South Africa -- Eastern Cape , Economic development projects -- South Africa -- Eastern Cape , Industries -- Social aspects -- South Africa -- Eastern Cape , Social responsibility of business -- South Africa -- Eastern Cape
  • Description: Corporate social responsibility has become the business issue of the 21st century. Heightened expectations of the business sector, globalisation and increased media attention on the role of business in society are casting an intense spotlight on this issue. As a result, pressure has built on business to play a larger role in bringing about socio-economic development to many local communities where they operate. While for a long time companies have been involved in the community on a philanthropy basis, many companies today are reassessing the manner in which they conduct their corporate social responsibility programmes. Many companies are including corporate social responsibility issues into their strategic planning process and overall corporate strategy. Emphasis is given to certain strategic indicators that must be present in order for a company to be said to have taken a strategic approach to corporate social responsibility. This study adopted a critical-realist approach using a case study method to evaluate DaimlerChrysler South Africa’s corporate social investment programmes in the local community of the Border-Kei region against these strategic indicators. This new form of engagement is even challenging for a multinational corporation, which may feel that it is only obliged to assist the local community where its corporate headquarters is located. But as companies derive an everlarger share of revenue and profits from international operations, multinational companies are being called upon to redefine “community”, by looking beyond local, domestic and geographical communities to include those in regions where they have factories or factories operated by key suppliers. This study found that DCSA was strategically involved and had a good relationship with its local community. However, the company needs to be more connected with the rural communities to make local projects more successful especially after handover.
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  • Date Issued: 2004

Development of integrated algal ponding systems in the treatment of wine distillery wastewaters

  • Authors: Dekker, Leendert Gideon
  • Date: 2003
  • Subjects: Sewage -- Purification -- Anaerobic treatment Wine and wine making -- Waste disposal -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4062 , http://hdl.handle.net/10962/d1004530
  • Description: In South Africa, wastewater disposal in the wine and distilling industry is undergoing a profound transformation as a result of fundamental changes in regulations and license requirements. To deal with this problem conventional Waste Stabilisation Ponding systems have been used by the industry together with irrigation and evaporation disposal practises. Although effective in the evaporation and containment disposal functions, these pond systems are generally not properly designed and/or managed, resulting in overloading and, at times, the generation of seriously offensive odour problems. Preliminary studies on the feasibility of utilising the Advanced Integrated Wastewater Ponding System as a core treatment technology in winery wastewater treatment were conducted. Results indicated that specific problems had to be addressed before successful ponding treatment could be achieved. This research programme undertook an investigation of the performance of a demonstration ponding system treating household sewage, which formed the basis of the research due to limited experience reported on ponds treating wine industry wastewaters. Malfunctions identified were in correlation with the preliminary winery waste ponding survey, which included unstable fermentation pit functions and inadequate nutrient removal. Retrofitting the fermentation pit with a nylon net across the rising water column resulted in improved retention of active anaerobic sludge, especially during periods of system start-up and/or organic overloading. An investigation into nutrient removal utilising algal biomass provided a valuable contribution towards development of an independent nutrient removal system. Harvested algal biomass was passively manipulated to release polysaccharides under anoxic conditions, with subsequent use as a carbon source by denitrifying organisms. Following denitrification, the still viable algal cells were introduced into a High Rate Algal Pond raceway for photosynthetically produced alkalinity. This high pH environment resulted in induced calcium phosphate mineral formation and subsequent precipitation, as well as effective ammonia stripping from the water. Based on the novel positive research outcomes a decision was made to proceed to the construction of a pilot-scale integrated ponding system treating wastewater from a wine lees factory. The system linked the Anaerobic Baffle Reactor, for pre-treatment, with the improved Advanced Integrated Wastewater Ponding System. The potential of this system has shown that a Waste Stabilisation Ponding system can be engineered to treat wine industry wastewaters and thereby effectively reduce the organic and nutrient loads, by using low-cost retrofitted upgrading unit operations. Valuable algal biomass may also be recovered as a by-product of the treatment process.
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  • Date Issued: 2003

The remote configuration of devices within home entertainment networks

  • Authors: Dembovsky, Colin
  • Date: 2002
  • Subjects: Home entertainment systems , Home video systems
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4685 , http://hdl.handle.net/10962/d1007795 , Home entertainment systems , Home video systems
  • Description: This thesis examines home entertainment network remote configuration solutions. It does so by inspecting four home entertainment networking solution specifications - HAVi, Jini, AV/C and UPnP. Two of these (AV/C and UPnP) are implemented partially for a system allowing a TV to configure an AudioNideo Receiver (AV/R) remotely on the network (a process known as remote configuration). The two implementations are then more closely investigated and several implementation differences in the approach between the remote configuration method of device configuration and other methods of device configuration are discerned. These different approaches are then categorised into one of two theoretical models of communication for configuring devices on home entertainment networks - the Rendering model and the Programmed model. By classifying a particular method of device configuration into one of the two models, manufacturers can quickly determine the inherent strengths and weaknesses of that method , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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The ecology and physiology of the springhare (Pedetes capensis) in the Eastern Cape Province of South Africa

  • Authors: Peinke, Dean Michael
  • Date: 2001
  • Subjects: Hares -- South Africa -- Eastern Cape Hares -- Breeding -- South Africa -- Eastern Cape Hares -- Ecology -- South Africa -- Eastern Cape Hares -- Physiology
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5670 , http://hdl.handle.net/10962/d1005355
  • Description: Springhare are large, bipedal, nocturnal, herbivorous, burrowing rodents that are found in arid and semi-arid parts of southern and eastern Africa. In this thesis I examine the general ecology, biology and physiology of these animals in the Eastern Cape Province of South Africa. An investigation of their distribution and activity in the study site showed that springhare exhibit a preference for flat, open, recently disturbed habitat that is dominated by the grass Cynodon dactylon and the sedge Cyperus esculentus. These two species constitute a major proportion of their diet. The impact of spring hare on chicory and grazing is also discussed. Nightly activity generally peaks soon after dark and decreases in the 2-4 hour period before sunrise. This pattern is, however, modified by moonlight. Springhare typically respond to moonlight by reducing aboveground activity, shifting their activity to dark moonless periods of the night, and by reducing their use of open space. Contrary to earlier reports, springhare utilise several different burrow systems spread over large areas. They regularly change burrow systems and seldom spend more than a few consecutive days in each. Springhare do not appear to defend territories but recently used burrows appear to be avoided by conspecifics. Males and females on average use a similar number of burrows, scattered over similar sized areas. Burrows are shown to provide a stable microclimate of moderate temperature and high humidity throughout the year. Reproduction is continuous and there is no synchronised breeding season. The ability to reproduce throughout the year is attributed primarily to their ability to utilise subterranean food stores. The overall reproductive strategy of springhare (a single young with long gestation and weaning) is unusual for a mammal of this size but may be linked to low levels of adult and juvenile mortality. Physiologically, springhare are reasonably well adapted to life in hot, arid environments. They produce a concentrated urine, exhibit a high tolerance to dehydration, are good osmoregulators capable of maintaining plasma volume, osmolality and ion balance over long periods of water deprivation, and are able to produce dry faeces. They are also good thermoregulators at low ambient temperatures, which are usually encountered at night, but are poor thermoregulators at high ambient temperatures, which they avoid behaviourally.
  • Full Text:
  • Date Issued: 2001

The biotechnology of high rate algal ponding systems in the treatment of saline tannery wastewaters

  • Authors: Dunn, Kevin Matthew
  • Date: 1998
  • Subjects: Sewage lagoons Tanneries -- Waste disposal Saline waters
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4006 , http://hdl.handle.net/10962/d1004066
  • Description: Salinisation has been identified as a major cause of the progressive deterioration in the public water system in South Africa. To deal with this problem Waste Stabilisation Ponding systems have been used by the Leather Processing Industry as zero-dischaJ;ge wastewater evaporation disposal processes in water-limited inland regions of the country. While effective in the evaporation disposal function these systems are plagued by the generation of serious odour nuisance creating intractable environmental problems relating to adjacent residential communities. High loading to ponds of organic compounds, sulphides and ammonia results in strongly reducing anaerobic conditions prevailing in early parts of pond cascades. These are characterised by bright red colours due to the predominance of purple photosynthetic bacteria. Sporadic micro algal blooms of Spirulina sp. and Dunaliella sp. had been previously noted to occur on the latter ponds in these cascades, and were associated with their conversion to facultative function, with aerobic surface layers, and a marked reduction in odour release. This research programme undertook an investigation of the microbial ecology of a tannery waste stabilisation ponding system to describe factors which give rise to these blooms, and to determine whether microalgal growth may be manipulated to achieve a reliable oxygengenerating capping of the anaerobic ponds. The predominance of near pure cultures of Spin/lina platensis was demonstrated for the blooms and factors restricting its growth in the system were described. These include the interaction of ammonia and sulphide toxic effects and laboratory studies were undertaken to show how effluent loading may be regulated to enable effective growth of the cyanobacterium. At appropriate dilutions of tannery effluent an enhancement of growth was noted, compared to growth in defined mineral medium. An investigation of this phenomenon provided preliminary evidence for organic uptake by the pond micro algae and a possible contribution to heterotrophic nutrition. The manipulation of Spirulina sp. growth in a High Rate Algal Pond raceway was undertaken in outdoor pilot plant studies and the effect of microalgal capping of the anaerobic ponds in the cascade was demonstrated by activating a recycle loop from a blooming facultative pond. Heavy metal contaminants were effectively eliminated by an optimisation of the primary anaerobic pond function and precipitation as metal sulphides. Biomass was harvested and dried, during which a range of methods were evaluated. Toxicological studies were undertaken on the dried biomass using Artemia and chick assays, and feed studies showed its useful application in rations for the abalone Haliotlls midae and rainbow trout Onchorhynchlls mykiss. Based on positive independent assessment of research outcomes, a decision was made by the tanning company operating the Waste Stabilisation Ponding system, to proceed to the construction of a full-scale 2 500 m2 High Rate Algal Pond raceway. This would be used for controlled Spirlilina biomass production to effect a practical capping of the anaerobic ponds in the system, and to evaluate its commercial potential in the feed market. The Advanced Integrated Wastewater Ponding System described by Oswald (1991) provided the conceptual basis for the Algal Biotechnology process development undertaken. The studies of the microbial ecology and the biotechnological potential of this system have shown that a Spirulina-based High Rate Algal Ponding process can be engineered in such a way that saline tannery effluents may be treated to effect a significant reduction in overall pollution load, that biomass may be recovered as a value added product of the treatment process and that the operational performance of Waste Stabilisation Ponding systems, and hence their immediate environment, may be improved by the use of the High Rate Algal Pond as a retrofitted upgrading unit operation.
  • Full Text:
  • Date Issued: 1998
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