Showing items 401 - 420 of 1233

Your selections:

Digital multimedia network with parameter join mechanism

  • Authors: Gurdan, Robby , Foss, Richard
  • Date: 2014
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/427059 , vital:72411 , https://patentimages.storage.googleapis.com/ae/e3/6a/0afc332b8afaea/US8855008.pdf
  • Description: A digital multimedia network with a parameter join mechanism comprising at least one apparatus. A requesting device parameter of a source apparatus updates a local parameter group list by adding an entry for each device parameter of a target apparatus which joins the parameter group.
  • Full Text:
  • Date Issued: 2014

Digital storytelling to explore HIV- and AIDS- related stigma with secondary school learners in a rural community in KwaZulu-Natal

  • Authors: Mnisi, Thoko Esther
  • Date: 2014
  • Subjects: AIDS (Disease) in adolescence -- Social aspects -- Africa, Southern , HIV infections -- Social aspects -- Africa, Southern , Stigma (Social psychology) -- South Africa -- KwaZulu-Natal , Digital storytelling
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: vital:9576 , http://hdl.handle.net/10948/d1018717
  • Description: This study explores, through digital storytelling, the experiences of HIV- and AIDS-related stigma of rural community secondary school learners. HIV- and AIDS-related stigma is seen as an impediment to a proficient response to HIV and AIDS in communities, also rural communities, and requires addressing. The rural community in which the research is undertaken is particularly hard hit by HIV and AIDS. Learners’ experiences of HIV- and AIDS related stigma could therefore inform how school and community could engage with HIV- and AIDS-related stigma and how they could address it in a constructive way. The study attempts to respond to two research questions: What can digital storytelling reveal about secondary school learners’ experiences of HIV- and AIDS-related stigma in schools in a rural community? How can digital storytelling enable secondary school learners in school in a rural community to take action to address stigma? This qualitative study is positioned within a critical paradigm, and employs a community-based participatory research strategy. Twelve Grade 8 and 9 male and female learners aged 15 to 18 years, from two secondary schools in rural Vulindlela district of KwaZulu-Natal, South Africa, who experienced, witnessed or heard about HIV- and AIDS-related stigma participated. Digital storytelling, a visual participatory method, was used to generate the data, and this was complemented by group discussion and written pieces completed by the participants in reflection sessions. The thematic analysis of the data made use of participatory analysis: the analysis of the digital stories was done by the participants while the overarching analysis was done by the researcher. This study, located in the field of the Psychology of Education, is informed by the theoretical framework of symbolic interactionism. In terms of the experienced stigma, it was found that living with HIV and AIDS and the related stigma is perceived as a ‘hardship’. The stigma is experienced on many levels: in the family, at school, and from friends and members of the community. It has an impact on the individual on an intrapersonal and interpersonal level. The young person is caught up in a vicious cycle of silent suffering since there are no reliable and trustworthy people with whom he or she can share these challenges. Some so-called traditional beliefs and customs such as not talking about sex, and practices like virginity testing, also fuel HIV- and AIDS-related stigma. The use of derogatory terms and the severe criticism of early sexual debut along with the gossiping which is used to spread the stigmatising statements further complicate the hardship experienced by young people. Digital storytelling was found to not only enable the learners’ voices to be heard but also to enable their taking charge of the stigma and thus create the space for critical participation in this research. The implications for the study are that the pervasive stigma that young people experience should be addressed at every level of the community. The stakeholders such as the families, school, educators, the King (Inkosi) and Chiefs (Indunas) of the area, relevant departments with that of Education taking the lead, must work hand-in-hand with the affected young people. Such collaboration may allow for the identification of the problem, for reflection on it, and also for the addressing of it. HIV- and AIDS-related stigma, while it has changed since the emergence of HIV, still is an issue that many HIV-positive individuals have to contend with. This stigma is, however, contextual and how the individual is stigmatised fits in with the language, meaning and thought that a community constructs around stigma. While digital storytelling enables the uncovering of particular stories of stigma that learners experience in the context of a school in a rural community, the digital storytelling in and of itself enables a change in the language, meaning and thought around stigma in its drawing on the specifics of the stigma as experienced in the community. Also, digital storytelling is about sharing stories about, and experiences of HIV- and AIDS-related stigma and how these stories can be used as part of the solution. If such stories can be told, people can spread them just as gossip is spread, but in this case such spreading would work towards positive social change. I claim that in order to confront the challenges raised by the perpetuation of stigma, efforts must involve the communities and must tap into their own experiences of perpetuating or enduring stigmatisation. Suggestions by the very same people from the community who are at the front line of perpetuating and /or suffering the stigma must be considered. This may also become one way of instantly communicating the research findings back to the community involved in the research. Using digital storytelling can ensure getting self-tailored, contextual, specific views on how HIV- and AIDS-related stigma is experienced but also how it could be addressed.
  • Full Text:
  • Date Issued: 2014

Direct and indirect effects of zooplanktivorous predators on the estuarine plankton community

  • Authors: Wasserman, Ryan John
  • Date: 2014
  • Subjects: Zooplankton -- Effect of predation on , Predation (Biology) , Zooplankton -- Predators of , Copepoda
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5870 , http://hdl.handle.net/10962/d1012938
  • Description: Although predation has been identified as a potentially important driver in terrestrial and freshwater ecosystems, estuarine planktonic research has focused largely on the so-called "bottom-up" drivers of community assemblages. As such, this thesis focuses on the direct and indirect effects of zooplanktivorous predators on the planktonic community in an estuarine environment. By using a suite of in situ mesocosm experiments, a number of hypotheses, pertaining to the major research themes associated with predator-prey interactions, are tested. These themes included trophic cascading, risk effects associated with predation events and the importance of predator diversity in maintaining prey communities. The first experiment assessed the significance of apex predation pressure for the planktonic community through trophic cascades. Various treatments using in situ mesocosms were established in a closed oligotrophic estuary to highlight the importance of predation in stabilising estuarine plankton abundances. Through either the removal (filtration) or addition of certain planktonic groups, varied trophic scenarios were established. The experimental treatment containing apex zooplanktivores had consequences for multiple trophic levels, exerting a stabilising pressure throughout the food web (Chapter 3). Furthermore, pyrosequencing of filtered water samples revealed that when compared to the remaining treatments, the treatment containing stable apex predatory pressure experienced limited temporal deviation-from-initial in bacterial community structure (Chapter 4). These findings are consistent with trophic cascade theory whereby predators mediate interactions at multiple lower trophic levels with consequent repercussions for diversity. To assess the non-consumptive effects of predators on prey, two experiments were conducted. Firstly, using egg numbers per clutch as a measure of potential reproductive output, the non-lethal effects of predatory pressure on reproductive success in a key planktonic copepod was investigated. In this study, the average clutch size of fecund female copepods was found to be consistently lower in the presence of predators when compared to females not exposed to predation threat (Chapter 5). The second study assessed the effects of conspecific chemical alarm cues associated with predation, on population dynamics of a copepod species. This study revealed that the copepods appear to detect the presence of chemical alarm cues associated with predation events, with repercussions for population demographics over time. Furthermore, it showed that in the absence of actual predation, copepod prey responses to alarm cues were adjusted over time, consistent with the threat sensitive predator avoidance hypothesis (Chapter 6). The final data chapter dealt with predator diversity and its implications for zooplankton community structure. By experimentally monitoring the effects of two alternate model predators on the metazoan community over time, dissimilarities in community level control emerged. Alternate key prey populations were regulated by the different model predators, highlighting the importance of predator and prey behaviour in mediating predator-prey interactions (Chapter 7). These results highlight the potential importance of predators in maintaining community dynamics in estuarine planktonic communities under certain conditions. This study represents some of the first work to address these various aspects of predator-prey dynamics within the context of planktonic estuarine ecology.
  • Full Text:
  • Date Issued: 2014

Director's duties under the Companies Act 71 of 2008

  • Authors: van Tonder, Jan-Louis
  • Date: 2014
  • Subjects: South Africa -- Companies Act, 2008 Corporation law -- South Africa , Commercial law -- South Africa
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: http://hdl.handle.net/10948/47892 , vital:40397
  • Description: This research focuses on an analysis of the prescribed standards of directors’ conduct provision. The thesis of the dissertation is to analyse what this provision introduces into statute. Previously, the fiduciary duties and the duty of care and skill were regulated by the common law and case law. In May 2004 the Department of Trade and Industry released a policy document entitled South African Company Law for the 21st Century Guidelines for Corporate Law Reform. The policy document acknowledged that South Africa had no extensive statutory dispensation that covered the duties of directors. The policy document recognised the need to bring South African company law in line with international trends and to reflect and accommodate the changing environment for businesses locally and internationally. For the first time in South Africa’s corporate law history, the Companies Act 71 of 2008 partially codifies the fiduciary duties of directors, the duty of care and skill and introduces the business judgment rule into South African company law. The research establishes what the standards of conduct are that are expected of directors and analyses the meaning of these duties in the standards of directors’ conduct provision. The research examines whether the duties introduced in the standards of conduct provision are aligned to the common law principles. It will consider whether the standards of conduct provision amends the common law principles, adds anything new or narrows the common law duties in its statutory format.
  • Full Text:
  • Date Issued: 2014

Distribution of heavy minerals sand in Namalope deposit, Moma district, Mozambique

  • Authors: Assane, Ali Ossufo
  • Date: 2014
  • Subjects: Heavy minerals -- Mozambique -- Moma District , Prospecting -- Mozambique -- Moma District , Mines and mineral resources -- Mozambique -- Moma District , Ilmenite -- Research , Zircon -- Research , Rutile -- Research
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5056 , http://hdl.handle.net/10962/d1012169 , Heavy minerals -- Mozambique -- Moma District , Prospecting -- Mozambique -- Moma District , Mines and mineral resources -- Mozambique -- Moma District , Ilmenite -- Research , Zircon -- Research , Rutile -- Research
  • Description: The spatial distribution of heavy minerals along the mine paths 2014 and 2015 at the wet concentrate plant B shows an increase of heavy minerals sand concentration northwards and slime contents southwards, and it is commonly associated with depth and grain sorting; the increase of heavy minerals concentration with depth is considered to be from the surface formed by Unit 6 to the bottom of Unit 7. The Unit 82 is characterized by low heavy minerals concentrations and high slime contents declining northwards. The mineral proportion estimation suggests that ilmenite is the most abundant heavy mineral in the entire area followed by zircon, rutile and mozanite, and some accessory minerals such as chromite, kyanite, staurolite, tourmaline, epidote, spinel and quartz. The ilmenite occurrence is divided into ilmenite low (< 53% TiO₂) and high (> 53% TiO₂); the ilmenite high with zircon and rutile shows tendency to increase northwards while ilmenite low increase southwards. Zircon, monazite, rutile, chromite, kyanite and staurolite show low variability, which is probably associated with high resistance of minerals for abrasion during transportation and diagenesis. The depositional model of the Namalope deposit, in the flat area and wet concentrate plant B in particular, suggests deposition in a shallow marine environment associated with regression for deposition of Unit 6, 7 and 9 and transgression during deposition of Unit 82. The spatial distribution of heavy minerals in the Namalope deposit and its environment of deposition are the key points for discovery of new deposits around the Namalope with the same characteristic of mineral assemblage and they are used for mine strategic plans such as update block model and mine design.
  • Full Text:
  • Date Issued: 2014

Distribution of iron-titanium oxides in the vanadiferous main magnetite seam of the upper zone : Northern limb, Bushveld complex

  • Authors: Gwatinetsa, Demand
  • Date: 2014
  • Subjects: Igneous rocks -- South Africa -- Bushveld Complex , Sulfide minerals -- South Africa -- Bushveld Complex , Vanadium -- South Africa -- Bushveld Complex , Titanium dioxide -- South Africa -- Bushveld Complex , Ferric oxide -- South Africa -- Bushveld Complex , Geology -- South Africa -- Bushveld Complex , Mineralogy -- South Africa -- Bushveld Complex , Mines and mineral resources -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5063 , http://hdl.handle.net/10962/d1013281
  • Description: The main magnetite seam of the Upper Zone of the Rustenburg Layered Suite (SACS, 1980) on the Bushveld Complex is known to host the world‘s largest vanadium bearing titaniferous iron ores. The vanadiferous titanomagnetites, contain vanadium in sufficient concentrations (1.2 - 2.2 per cent V₂O₅) to be considered as resources and vanadium has been mined historically by a number of companies among them Anglo-American, Highveld Steel and Vanadium and VanMag Resources as well as currently by Evraz Highveld Steel and Vanadium Limited of South Africa. The titanomagnetites contain iron ore in the form of magnetite and titanium with concentrations averaging 50-75 per cent FeO and 12-21 per cent TiO₂. The titaniferous iron ores have been historically dismissed as a source of iron and titanium, due to the known difficulties of using iron ore with high titania content in blast furnaces. The economic potential for the extractability of the titaniferous magnetites lies in the capacity of the ores to be separated into iron rich and titanium rich concentrates usually through, crushing, grinding and magnetic separation. The separatability of iron oxides and titanium oxides, is dependent on the nature in which the titanium oxide occurs, with granular ilmenite being the most favourable since it can be separated from magnetite via magnetic separation. Titanium that occurs as finely exsolved lamellae or as iron-titanium oxides with low titania content such as ulvospinel render the potential recoverability of titanium poor. The Upper Zone vanadiferous titanomagnetites contain titanium in various forms varying from discrete granular ilmenite to finely exsolved lamellae as well as occurring as part of the minerals ulvospinel (Fe₂TiO₄) and titanomagnetite (a solid solution series between ulvospinel and magnetite) . Discrete ilmenite constitutes between 3-5 per cent by volume of the massive titanomagnetite ores, and between 5-10 per cent by volume of the magnetite-plagioclase cumulates with more than 50 per cent opaque oxide minerals. The purpose of this research was to investigate the mineralogical setting and distribution of the iron and titanium oxides within the magnetitite layers from top to bottom as well as spatially along a strike length of 2 000m to determine the potential for the titanium to be extracted from the titanomagnetite ores. The titanomagnetites of the Upper Zone of the Bushveld Complex with particular reference to the Northern Limb where this research was conducted contains titanium oxides as discrete ilmenite grains but in low concentrations whose potential for separate economic extraction will be challenging. The highest concentration of titanium in the magnetite ores is not contained in the granular ilmenite, but rather in ulvospinel and titanomagnetite as illustrated by the marked higher concentration of TiO₂ in the massive ores which contain less granular ilmenite in comparison to the disseminated ores which contain 3 to 8 percentage points higher granular ilmenite than the massive ores. On the scale of the main magnetite seam, the TiO₂ content increases with increasing stratigraphic height from being completely absent in the footwall anorthosite. The V₂2O₅ content also increases with stratigraphic height except for in one of the 3 boreholes where it drops with increasing height. The decrease or increase patterns are repeated in every seam. The titanomagnetites of the main magnetite seam display a variety of textures from coarse granular magnetite and ilmenite, to trellis ilmenite lamellae, intergranular ilmenite and magnesian spinels and fine exsolution lamellae of ulvospinel and ferro-magnesian spinels parallel to the magnetite cleavage. The bottom contact of the main magnetite seam is very sharp and there is no titanium or vanadium in the footwall barely 10cm below the contact. Chromium is present in the bottom of the 4 layers that constitute the main magnetite seam and it upwards decreases rapidly. In boreholes P21 and P55, there are slight reversals in the TiO₂ and V₂O₅ content towards the top of the magnetite seams.
  • Full Text:
  • Date Issued: 2014

Diversity management practices at Lovedale College

  • Authors: Chola, Zolani
  • Date: 2014
  • Subjects: Diversity in the workplace -- South Africa -- King William's Town , Public universities and colleges -- South Africa -- King William's Town
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9392 , http://hdl.handle.net/10948/d1021163
  • Description: The global working environment has altered dramatically over the last decade and in particular, the workforce has begun to consist of many diverse individuals. The world has become a global marketplace, with boundaries between countries becoming increasingly vague and permeable. Advances in technology and the advent of a global economy have brought people from different countries closer together. Globalisation has precipitated many challenges in modern organisations, and one of these challenges is workforce diversity. Workforces in organisations differ in terms of gender, age, race, ethnicity and sexual orientation. Globally, countries are faced with the spiralling challenge of skills shortages and there is an expanding competition for skilled workers, specifically for those who possess scarce skills. This leads to an expatriation of skills, creating a natural increase in workforce diversity that expands beyond local ethnicity and language. This affects all organisations, including academic institutions such as universities, universities of technology and public further education and training colleges. Given this challenge organisations, educational institutions and other entities are investigating ways to better deal or serve their constituents. Lovedale PFET College is a public further education and training college that provides skills to young South Africans, specifically vocational related skills. The main research problem of this study was to identify the recommended diversity management best practices that characterise effective organisations and determine the extent to which these practices are applied at Lovedale PFET College. In order to address the problem, a theoretical study was conducted which focused on identifying the recommended diversity management best practices. In addition, interviews were conducted with managers at Lovedale College to gain an understanding of their perspective on diversity management. Based on the combined main points gleaned from theory and the interviews, a questionnaire was developed and administered to both academic and support staff at Lovedale PFET College to obtain their perceptions of the diversity practices and outcomes at the college. The results of the survey revealed that Lovedale PFET College could improve on the implementation of best practices in diversity management. Specifically, attention could be given to diversity education and training, and diversity management policies and procedures.
  • Full Text:
  • Date Issued: 2014

DNS traffic based classifiers for the automatic classification of botnet domains

  • Authors: Stalmans, Etienne Raymond
  • Date: 2014
  • Subjects: Denial of service attacks -- Research , Computer security -- Research , Internet -- Security measures -- Research , Malware (Computer software) , Spam (Electronic mail) , Phishing , Command and control systems
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4684 , http://hdl.handle.net/10962/d1007739
  • Description: Networks of maliciously compromised computers, known as botnets, consisting of thousands of hosts have emerged as a serious threat to Internet security in recent years. These compromised systems, under the control of an operator are used to steal data, distribute malware and spam, launch phishing attacks and in Distributed Denial-of-Service (DDoS) attacks. The operators of these botnets use Command and Control (C2) servers to communicate with the members of the botnet and send commands. The communications channels between the C2 nodes and endpoints have employed numerous detection avoidance mechanisms to prevent the shutdown of the C2 servers. Two prevalent detection avoidance techniques used by current botnets are algorithmically generated domain names and DNS Fast-Flux. The use of these mechanisms can however be observed and used to create distinct signatures that in turn can be used to detect DNS domains being used for C2 operation. This report details research conducted into the implementation of three classes of classification techniques that exploit these signatures in order to accurately detect botnet traffic. The techniques described make use of the traffic from DNS query responses created when members of a botnet try to contact the C2 servers. Traffic observation and categorisation is passive from the perspective of the communicating nodes. The first set of classifiers explored employ frequency analysis to detect the algorithmically generated domain names used by botnets. These were found to have a high degree of accuracy with a low false positive rate. The characteristics of Fast-Flux domains are used in the second set of classifiers. It is shown that using these characteristics Fast-Flux domains can be accurately identified and differentiated from legitimate domains (such as Content Distribution Networks exhibit similar behaviour). The final set of classifiers use spatial autocorrelation to detect Fast-Flux domains based on the geographic distribution of the botnet C2 servers to which the detected domains resolve. It is shown that botnet C2 servers can be detected solely based on their geographic location. This technique is shown to clearly distinguish between malicious and legitimate domains. The implemented classifiers are lightweight and use existing network traffic to detect botnets and thus do not require major architectural changes to the network. The performance impact of implementing classification of DNS traffic is examined and it is shown that the performance impact is at an acceptable level.
  • Full Text:
  • Date Issued: 2014

Domestic tax law v double tax treaties in the context of controlled foreign companies

  • Authors: Froom, Natalie Marie
  • Date: 2014
  • Subjects: Taxation -- Law and legislation -- South Africa , Fiscal policy -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: http://hdl.handle.net/10948/3559 , vital:20442
  • Description: The South African fiscal legislators have found it necessary to introduce anti-avoidance legislation which governs controlled foreign companies in order to counteract schemes devised by taxpayers where companies are established outside South Africa for the purpose of diverting income from the South African fiscal net. Whilst the enforcement of such legislation does have merit in that the intention behind the introduction of such domestic legislation is to prevent the erosion of the South African tax base, it is submitted that this does pose a problem from an international perspective. The objective of this treatise is to conduct a critical analysis of how compatible the South African fiscal legislation which governs controlled foreign companies is with the provisions of the double taxation agreement as prescribed in terms of the OECD Model Tax Convention (which was published in July 2010). In addition, the aim of this study is to deduce whether the purpose of the double taxation agreement is not only the avoidance of juridical double taxation but also that it addresses the avoidance of economic double taxation. This will assist in determining whether domestic controlled foreign company legislation (as embodied in section 9D of the Income Tax Act 58 of 1962) conflicts with the purpose of the double taxation agreement. By conducting an extensive research study and by depicting a certain scenario which addresses the issue at hand, the following is concluded: The tax treatment of the business profits generated by a controlled foreign company resident in a State outside South Africa and which have been generated from active business operating activities, is held to be in agreement with the provisions of the double taxation agreement. By contrast, the tax treatment of the controlled foreign company’s passive income in the form of interest income, is found not to correlate with the aforesaid agreement. As will be demonstrated in the chapters that follow, the controlled foreign company’s interest income is subjected to economic double taxation in terms of the scenario depicted in this treatise. This means that such income is taxed twice in the hands of two different taxpayers in two different States. As a result of this it is submitted that the following problem arises: Because section 9D of the Income Tax Act causes economic double taxation to occur (as illustrated in the previous paragraphs) and owing to the fact that the purpose of the double taxation agreement is the avoidance of economic double taxation, it can be shown that the section 9D domestic legislation conflicts with the terms of the double taxation agreement. This conflict is considered to be an area of concern because a contravention of the purpose of the double taxation agreement is regarded as a breach of the Contracting States’ international obligations in terms of the aforesaid agreement. It is further submitted that paragraph 23 of the OECD Commentary on article 1 and paragraph 14 of the OECD Commentary on article 7 are incorrect when they express the sentiment that domestic controlled foreign company legislation does not conflict with the provisions of the double taxation agreement. It is proposed that this be corrected to state the contrary.
  • Full Text:
  • Date Issued: 2014

Dreamscape and death : an analysis of three contemporary novels and a film

E-Literacy training in deep rural areas: The Siyakhula Living Lab experience

  • Authors: Gumbo, Sibukelo , Ntšekhe, Mathe , Terzoli, Alfredo
  • Date: 2014
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/431411 , vital:72772 , http://proceedings.e-skillsconference.org/2014/e-skills141-154Gumbo824.pdf
  • Description: Within the discourse of broadband deployment in poor areas (particular-ly rural), very little attention is generally put on the critical enabler repre-sented by e-literacy training that empowers people to use ICT systems, especially in the form of full-fledged machines such as fixed, tower and laptop computers (These machines are still more preferable for growing a generation of ‘producers’ as opposed to ‘consumers’ in the ICT space.) This paper reports on the experience in running e-literacy in a deep rural area, as part of the Siyakhula Living Lab (SLL), whose end goal is to diffuse production oriented ICTs in poor areas of South Africa and Africa. In particular it will expand on the feedback given by the par-ticipants to the last edition of the e-literacy course, run in the first se-mester of 2014. The lessons learned from this experience include: the need for linguistic localization of the learning material or at least part of its presentation; the importance of teaching and learning that facilitates (easy) transfer of knowledge gained to other ICT settings (such as mo-biles; or uses to support business); and the importance of face-to-face courses to allow real interaction with the people living in the targeted areas, partly as a strategic means to forging relations towards the reali-zation of the Living Lab vision (co-creation of solutions with empowered users). Altogether, e-literacy courses have proved to be critical to the broad aim of SLL of ‘activating’the segment of society living in poor ar-eas towards self-determination. A small but telling indicator is the trans-formation in the view people have of themselves once certified as e-literate.
  • Full Text:
  • Date Issued: 2014

E-tolling in Gauteng: problems and perceptions

Echoes of colonial discourse in journalism:

  • Authors: Wasserman, Herman
  • Date: 2014
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/159891 , vital:40353 , https://doi.org/10.1080/02560054.2014.886657
  • Description: Last year marked the 200th anniversary of the birth of David Livingstone, the explorer and missionary who is best remembered as an anti-slavery campaigner who presented Africa in humanitarian terms to the British Empire. Today the legacy of colonialism continues to haunt the continent, and the discourses of colonialism can still be heard in media representations of Africa.
  • Full Text:
  • Date Issued: 2014

Ecological consequences of non-native fish invasion in Eastern Cape headwater streams

  • Authors: Ellender, Bruce Robert
  • Date: 2014
  • Subjects: Fishery management -- South Africa -- Eastern Cape Fishes -- Conservation -- South Africa Introduced fishes -- South Africa -- Eastern Cape Introduced organisms
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/69065 , vital:29380
  • Description: The introduction, spread and concomitant impacts of non-native species are a global problem. Fish are among the most widely introduced vertebrate groups, with their impacts affecting multiple levels of organisation- from individuals, populations and communities, to entire ecosystems. In South Africa, the largest perceived threat to range-restricted endemic headwater stream fishes is said to be invasion by non-native fishes, however, as is the case elsewhere, invasive impacts are often a case of risk perception rather than actual risk analysis. Two range-restricted headwater species, the Eastern Cape redfin Pseudobarbus afer and the Border barb Barbus trevelyani are redlisted by the International Union for the Conservation of Nature (IUCN) as ‘Endangered’, primarily due to invasion by non-native fishes. To investigate invasions in South Africa, and provide a quantitative estimate of the impact of non-native fishes on the two imperilled endemics, P. afer and B. trevelyani, the overall aims of this thesis were to: (A) Provide a literature review on non-native fish invasions in South Africa; (B) Using two case studies on the headwaters of the perennial Keiskamma and episodic Swartkops River systems, investigate the naturalisation-invasion continuum to provide a holistic view of the invasion process in these variable environments. The specific thesis objectives were: (1) Reviewing current knowledge of invasive impacts of non-native fishes in South Africa; (2) Investigating invasibility of headwater stream environments by non-native fishes; (3) Determining the establishment success of non-native fishes, (4) Assessing the spatial and temporal impacts of invasion; (5) Understanding mechanisms responsible for non-native fish impacts; (6) Investigating the threat of non-native fish invasion on the genetic diversity of two the two headwater fishes, P. afer and B. trevelyani. Results from the literature review of fish invasions (Chapter 1) showed that South Africa has a long history of non-native fish introductions, spanning two and a half centuries. Currently, 55 species have been introduced or translocated. Many of these introduced species have become fully invasive (36%). Their impacts also span multiple levels of biological organisation. There was a general paucity of studies on fish invasions (38 studies), however, of those conducted, reviewed studies placed emphases on invasive impacts (25 studies) and the transport, introduction, establishment and spread stages of the invasion process were largely ignored. The two study systems, the Swartkops and Keiskamma Rivers, were heavily invaded and numbers of introduced species surpassed that of natives (Chapter 2, 3 and 5). Headwater streams had varying invasibility and a number of non-native species were successfully established (Chapter 2, 3, 5 and 6). The remainder of the invasions were casual incursions into headwater streams from source populations in mainstream and impoundment environments which were invasion hotspots. Irrespective of establishment, four predatory invaders (largemouth bass Micropterus salmoides, smallmouth bass M. dolomieu, brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss) impacted heavily on native fish communities (Chapter 3, 4 and 5). Two broad types of invasion were documented, top down invasion by non-native O. mykiss and S. trutta and upstream invasion by M. salmoides and M. dolomieu (Chapter 3 and 5). Their impacts included changes in community structure, extirpation from invaded stream reaches resulting in contracted distribution, and isolation and fragmentation of native fish populations. The impacts of non-native predatory fishes were particularly acute for P. afer and B. trevelyani. Where non-native predatory fish occurred, P. afer and B. trevelyani had been extirpated (Chapter 3 and 5). As a result both native species exhibited contracted distributions (>20% habitat loss due to invasion). Upstream invasion by centrarchids isolated and fragmented P. afer populations into headwater refugia, while top down invasion by salmonids excluded B. trevelyani from invaded, more pristine stream reaches, by forcing the species into degraded unsuitable lower stream reaches. Predation also disrupted population processes such as adult dispersal for P. afer, and centrarchid-invaded zones acted as demographic sinks, where adults dispersing through invaded reaches were rapidly depleted. While the Mandela lineage of P. afer exhibited little within or between drainage genetic structuring, B. trevelyani was >4% divergent between drainages, and up to 2% divergent between streams within the Keiskamma River system (Chapter 7). The distribution of genetic diversity for B. trevelyani also indicated that the loss of diversity was imminent without immediate conservation interventions. This thesis has provided conclusive evidence that native fishes are vulnerable to invasion and that non-native predatory fishes have significant impacts on native fishes in Eastern Cape headwater streams. If management and conservation measures are implemented, the unwanted introduction and spread of non-native fishes may be restricted, allowing native fishes opportunities for recovery.
  • Full Text:
  • Date Issued: 2014

Editorial

  • Authors: Olvitt, Lausanne L
  • Date: 2014
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/391156 , vital:68625 , xlink:href="https://www.ajol.info/index.php/sajee/article/view/121960"
  • Description: This year marks the end of the United Nations Decade of Education for Sustainable Development which was first proposed at the World Summit on Sustainable Development in 2002 in Johannesburg. At the end of 2014 UNESCO hosted the World Conference on Education for Sustainable Development in Nagoya, Japan. To mark this occasion Professor Rob O’Donoghue produced a reflective Think Piece that traces the emergence of education for sustainable development (ESD) from its educational roots in the Modernist project, to the diversity of practices that currently frame ESD as a transgressive process of cultural change. O’Donoghue interrogates tensions around knowledge and participation in the ESD terrain and proposes that knowledge-led and ethics-led learning in relation to valued purposes might create educational possibilities for expansive, transgressive and reflexive learning processes towards a more sustainable future. This Think Piece opens the Journal; many of the strengths, tensions and generative opportunities in environment and sustainability education referred to by O’Donoghue are reflected in this edition of the journal.
  • Full Text:
  • Date Issued: 2014

Editors reflect on the state of journalism: the cha(lle)nging media space

  • Authors: Malila, Vanessa
  • Date: 2014
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/158650 , vital:40218 , https://hdl.handle.net/10520/EJC159502
  • Description: Trying to understand how journalists and editors in the South African media landscape think about the work they do and the environment in which they work is not easy. However, while many of us speculate about why things are reported on in one way or another, this article gets to the heart of the issue - or the mouth - by speaking to journalists and editors about the work they do and how things have changed in the last few years within this complex institution we call the media.
  • Full Text:
  • Date Issued: 2014

Education is an essential service

  • Authors: Geyer, Simone
  • Date: 2014
  • Subjects: Collective bargaining -- Education -- South Africa , Right to education -- South Africa
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: vital:10254 , http://hdl.handle.net/10948/d1020875
  • Description: This treatise investigates the extent to which education could be declared an essential service. This is informed by an ongoing public perception that education is in a crisis as a result of the ease within which teachers embark on wildcat strikes, the level of absenteeism in schools, the manner in which communities prevent learners from attending school to place pressure on the state to meet service delivery demands, the lack of professionalism among teachers and the performance of our learners in achieving international benchmarks of results. The treatise critically explores the debate, in the South African context, on the need to declare education as an essential service in South Africa. This is done by examining the international benchmarks set by the International Labour Organization (ILO) in relation to essential services and what motivating reasons exist, if any, to proceed with declaring education as an essential service. There is a dire need to find a balance between the teachers’ right to strike and the learners’ right to basic education. At the moment there is a threat to this balance with the rights of teachers appearing to override those of learners and this has a negative impact on the learning outcomes and stability in education. The question that arises is what measures must the South African government put in place to ensure that the fundamental rights to education are not compromised. If the current situation continues to prevail it has the danger of retarding the development of a society in transition. There is a need for urgent intervention that takes on a consensus-based approach of identifying education as an essential priority in the interests of all. Can this be achieved by developing a minimum service level agreement for education that outlines which levels of teachers may go on strike? Can policy be regulated that outlines the duties of principals and deputy principals as those who are in the authority of the state and as such may not go on a strike? Can this be achieved without compromising the rights of any citizen as guaranteed in the Constitution of South Africa? The solution that this treatise provides to these vexing questions attempts to balance the rights of teachers with those of learners with a view to normalizing and stabilizing education in South Africa. It recommends that policy be set in place for principals and deputy principal that identifies them as part of those public servants who are in the authority of the state and therefore may not embark on a strike. This will enable the state to gain control of striking situations in education to ensure that there is still authority at the schools to maintain some level of minimum service, especially where there are very young learners. At the same time this will not be so severe as to render a strike in education ineffective for the teachers’ not to be able to exert force on the state to achieve improved conditions of service for themselves.
  • Full Text:
  • Date Issued: 2014

Educational needs of the financial planning industry

  • Authors: Palframan, Jaqueline Birgitta
  • Date: 2014
  • Subjects: Financial planning industry , Financial planners
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:9327 , http://hdl.handle.net/10948/d1020986
  • Description: The South African financial planning industry experienced a rapid growth from its generic beginnings in the 1970’s to the vast levels of specialisation taking place in the 21st century. Financial planning, akin to the medical profession, is arguably one of the most critical areas of influence in the personal lifestyle planning of individuals given the increasing longevity brought about by the medical profession. Early transgressions and irregularities, as in the case of most industries, brought about the introduction of the Financial Advisory and Iintermediary Services (FAIS) Act in 2004 to regulate, transform and restructure the industry. Since the introduction of the Act, compliance with the legislation and obtaining the appropriate qualifications have become a major focus for financial planners. This groundbreaking academic research involves an assessment of the educational needs of graduates in the financial planning industry including an evaluation of the relative importance of the subject fields, management competencies and skills required in the field of financial planning with specific reference to the financial planning programmes offered by the HEIs in South Africa. The purpose of this study can be phrased in a threefold manner: Firstly, to assess at programme level the theoretical and practical relevancy of the HEIs financial planning programme content relative to the present and immediate future normative requirements of the financial planning profession; Secondly, to assess whether the academic programmes address the critical skills shortage in financial planning by determining the appropriate qualification delivery in terms of academic and practical learning to develop the appropriate management competencies; and Thirdly, based on the findings of this research, to address any gaps pertaining to the financial planning programme content and management competency and skills levels, thereby contributing to the body of knowledge pertaining to financial planning education in order to be relevant and responsive in servicing the financial services sector. To give effect to the problem statement and to validate the research propositions, a mixed methods design within the pragmatic research paradigm was used. A relatively new and innovative mixed methods approach, namely Real-time Delphi (RTD) procedures of sourcing professional expert opinion enabled the collection of qualitative and quantitative data for data triangulation. The RTD methodology which seeks the pooled intelligence from a group of selected experts is also capable of determining future requirements rather than only the current practice. This is the first academic study of its kind in South Africa utilising the RTD methodology.
  • Full Text:
  • Date Issued: 2014

Educators’ perceptions of foundation phase mathematics Curriculum Assessment Policy Statements (CAPS)

  • Authors: Mnqatu, Fiola Wayne
  • Date: 2014
  • Subjects: Curriculum evaluation -- South Africa , Curriculum planning -- South Africa , Mathematics -- Study and teaching --South Africa
  • Language: English
  • Type: Thesis , Masters , M Ed
  • Identifier: http://hdl.handle.net/10353/1358 , vital:26549 , Curriculum evaluation -- South Africa , Curriculum planning -- South Africa , Mathematics -- Study and teaching --South Africa
  • Description: The aim of the study was to investigate the educators’ perceptions of the Foundation Phase Mathematics Curriculum Assessment Policy Statements (CAPS). This was a case study of eight educators in two primary schools based in Cradock in the Eastern Cape Province of South Africa. There were six main findings. First, all participants displayed a good general knowledge of CAPS. They saw CAPS as different from NCS in that the former is content driven as opposed to outcomes driven in the latter. Second, all participants were happy that CAPS specifies what is to be taught grade by grade as opposed to NCS which specified outcomes and required educators to construct the content. Third, a feature which participants liked was the weighting of different components of the subjects taught. This was seen as an important guideline that indicates how much time should be spent on each component. Fourth, participants understood that CAPS is not a new curriculum; it is an amendment of the NCS. As such educators used the same teaching strategies and methods. Fifth, participants had reservations about the CAPS assessment guidelines as they were the same as those of the NCS and felt that the guidelines which require educators to discuss assessment criteria with children were not suitable for children in Foundation Phase. Sixth, participants were happy with the CAPS programme of assessment and workbooks .They felt the programme guides their teaching while the workbooks complement their teaching. It can be concluded that educators, on the whole, held positive perceptions about CAPS. They saw it as explicit about the content that is to be taught, and it has clear guidelines about assessment procedures. For this reason it can be seen as an improvement on the NCS. Given the findings, it can be recommended that further research be carried out on how educators’ understanding of CAPS is translated into practical teaching and learning in the classroom. To improve the delivery of CAPS, the Education Department must devise strategies aimed at educator empowerment activities that will enhance their work performance.
  • Full Text:
  • Date Issued: 2014

Effect of bovine serum albumin and single walled carbon nanotube on the photophysical properties of zinc octacarboxy phthalocyanine

  • Authors: Ogbodu, Racheal O , Nyokong, Tebello
  • Date: 2014
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/189806 , vital:44933 , xlink:href="https://doi.org/10.1016/j.saa.2013.10.064"
  • Description: This work reports on the photophysical parameters of the conjugate between zinc octacarboxy phthalocyanine (ZnOCPc) and bovine serum albumin (BSA) represented as ZnOCPc–BSA (1) which was further adsorbed onto single walled carbon nanotubes (SWCNT) represented as (ZnOCPc–BSA–SWCNT 2). ZnOCPc (without BSA) was also adsorbed on SWCNT represented as ZnOCPc–SWCNT (3). The presence of BSA resulted in the increase in singlet oxygen quantum yield (ΦΔ) for 1 (at ΦΔ = 0.44) and 2 (at ΦΔ = 0.41) compared to ΦΔ = 0.21 for ZnOCPc alone. For complex 3 which did not contain BSA singlet oxygen quantum yield decreased.
  • Full Text:
  • Date Issued: 2014
  • Disclaimer
  • Privacy
  • Copyright
  • Contact