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The PINIT domain of PIAS3: structure-function analysis of its interaction with STAT3

  • Authors: Mautsa, Nicodemus , Prinsloo, Earl , Tastan Bishop, Özlem , Blatch, Gregory L
  • Date: 2011
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/148082 , vital:38708 , DOI: 10.1002/jmr.1111
  • Description: The protein inhibitor of activated signal transducer and activator of transcription 3 (PIAS3) regulates the transcriptional activity of signal transducer and activator of transcription 3 (STAT3) which regulates transcription of genes involved in cell growth, proliferation and apoptosis. The conserved proline, isoleucine, asparagine, isoleucine, threonine (PINIT) domain of PIAS3 is thought to promote STAT3–PIAS3 interaction.
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  • Date Issued: 2011

The possible introduction of advance pricing agreements in South Africa income tax legislation

  • Authors: Malevu, Shimane Mbuyiseni
  • Date: 2011
  • Subjects: Transfer pricing -- Taxation -- South Africa , Price regulation -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:8954 , http://hdl.handle.net/10948/1333 , Transfer pricing -- Taxation -- South Africa , Price regulation -- South Africa
  • Description: This treatise analyses the suitability of the Advance Pricing Agreements (APA) for the South African Transfer Pricing legislation. The transfer pricing legislation places emphasis on the arm's length principle. Determining an arm's length price is problematic and as a result some countries have resorted to APA's to establish an arm's length price up-front, and thus avoid reviews and subsequent audits. The treatise first focuses on the transfer pricing provisions and other relevant applicable sections of the Act from the South African point of view, and it then examines the current status quo, i.e. the review processes used by the South African Revenue Services (SARS) as detailed in the Organisation of Economic Co-operation and Developments (OECD) Guidelines and the SARS Practice Note. Since negotiated tax treaties form part of the South Africa law, the impact of these treaties are discussed in Chapter 4. The treatise discusses in detail an APA from the OECD's point of view. It examines the objectives of an APA; the benefit and the shortcomings of using an APA. It then examines the APA request processes from a Canadian perspective and the administration of the APA from an USA perspective. The treatise examines South African trading partners using APA in transfer pricing matters, with reference to the effects and the challenges such countries face. The treatise concludes by looking at the benefits provided by use of an APA by South African major trading partners. The effect and the use of such APA will have in South Africa is also discussed and how it should be modelled; the present status quo with regard to personnel at SARS; and the possible impact the introduction and implementation will have in South Africa.
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  • Date Issued: 2011

The potential for voluntary instruments to achieve conservation planning goals : the case of conservancies in South Africa

  • Authors: Downsborough, Linda , Shackleton, Charlie M , Knight, Andrew T
  • Date: 2011
  • Language: English
  • Type: Article
  • Identifier: vital:6629 , http://hdl.handle.net/10962/d1006821
  • Description: Spatial prioritizations and gap analyses are increasingly undertaken to allocate conservation resources. Most spatial prioritizations are conducted without specifying the conservation instruments to be implemented and gap analyses typically assess formally protected areas but increasingly include private land conservation instruments. We examine conservancies to see if these voluntary instruments contribute towards achieving goals of South African conservation planning initiatives. We conducted a nationwide survey and interviews with conservancy members in Gauteng and the Eastern Cape. Conservancies have potential for assisting South Africa to achieve conservation planning goals at national and local scales but their inclusion in spatial prioritizations and gap analyses predicates improved protection for nature, operational refinement and increased support. We sound a warning to conservation planning initiatives that incorporate voluntary instruments on private land, and present recommendations for strengthening such instruments to make them more effective. Our findings may assist conservation planners elsewhere to design more effective conservation planning initiatives focused on private land.
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  • Date Issued: 2011

The potential impact of diving charges on the demand for diving and the diving industry in the Aliwal Shoal Marine Protected Area: a pilot study

  • Authors: Schmidt, Jadon
  • Date: 2011
  • Subjects: Marine parks and reserves -- South Africa -- KwaZulu-Natal Recreational dive industry -- South Africa -- KwaZulu-Natal Recreational dive industry -- Licenses -- South Africa -- KwaZulu-Natal Marine parks and reserves -- South Africa -- KwaZulu-Natal -- Management Conservation of natural resources -- South Africa -- KwaZulu-Natal Environmental management -- South Africa -- KwaZulu-Natal Marine resources conservation -- South Africa -- KwaZulu-Natal Waste disposal in the ocean -- South Africa -- KwaZulu-Natal Marine pollution -- South Africa -- KwaZulu-Natal
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:756 , http://hdl.handle.net/10962/d1003877
  • Description: This research is presented in three sections. Section 1 presents the research report in an Academic Paper format. Section 2 provides a comprehensive literature review and Section 3 describes the research methodology and methods employed. Sustainable management of natural resources is a global imperative. It is particularly significant in a country like South Africa that is blessed with an abundance of biological diversity but faces many socio economic challenges that are associated with developing nations. Toward addressing these issues, diver permit fees were implemented in South Africa in 2005, making it a legal requirement for all scuba divers undertaking a dive in a Marine Protected Area (MPA) to purchase a permit. This pilot study is the first attempt since the inception of the dive permit fees to determine their impact on the demand for diving and the diving industry in the Aliwal Shoal MPA, one of the premier dive destinations in the country. In order to address key questions, qualitative data was gathered during interviews with 12 dive operators active in the MPA and 28 divers that utilised the operators to dive. In addition, independent quantitative data on the number of dive boat launches during the past 20 years was used in conjunction with mean paying diver data obtained from the operators to ascertain the demand for diving at the Aliwal Shoal during the past two decades. Results indicate that were no significant differences (at the 5% level of significance) between paying divers during 2005 compared to 2004 and 2006 [H =.1923366, N= 36, p =0.9083]. Paying diver data for the period 2000 - 2004 were compared to 2005 - 2010 and no significant differences were found at the 5% level of significance (U= 2040, Npost = 72, Npre= 60, p = 0.584981). Diver interviews revealed that only 36% of divers had paid for a permit, representing a loss of R7 438 499 during the past five years, enough to support the current budget of the MPA for 10.6 years. Operator interviews revealed that alternative destinations, economic climate and local competition had the most impact on their businesses, with permit fees having no impact on the 50% of the operators’ businesses. Operators also reported that there was little or no enforcement of the permit fees, 9 of the operators indicated that there has been no improvement in the MPA or its management since the inception of the fees and all were dissatisfied with the current management MPA. Operators and divers complained about the current purchasing and handling practices associated with the permits. Despite offering a world class diving opportunity, the dive operators currently have no incentive to enforce the permit system and due to price pressure in the local market, and have adopted a mute stance on diver permits. Consequently, there has been no significant impact on the demand for diving since the inception of the permits in 2005. The initial hypothesis that the increased costs to divers as a result of the permits would drive down the demand for diving is therefore rejected. If the permits are more strictly enforced, it is likely that more divers may seek alternative destinations due to the perception of poor value as a result of the Sappi Saiccor effluent discharge, existence of shark nets and poor management, in accordance with existing literature. The resultant decrease in demand will be detrimental to the diving industry at Aliwal Shoal. The second hypothesis, that the costs associated with the better enforcement of the MPA regulations-in terms of impacts on the diving industry- might outweigh the benefits, is therefore accepted. All the results produced by this study suggest that authorities may have been too enthusiastic to have all the boxes ticked in order to meet deadlines for international targets for marine conservation and paid little or no attention to lessons learnt from MPAs globally. Every negative aspect highlighted by existing international literature as symptomatic of MPA failure is occurring at Aliwal Shoal MPA, albatrossing it with “paper park” status. Due to the size and scope of this study, the results should be interpreted with caution and not be utilised to guide policy but rather encourage further research.
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  • Date Issued: 2011

The prevalence and consequences of workplace bullying in South Africa

  • Authors: Momberg, Markus Albertus
  • Date: 2011
  • Subjects: Bullying in the workplace -- South Africa -- Prevention , Harrasment -- South Africa , Organizational behavior -- South Africa , Interpersonal relations -- South Africa , Labour laws and legislation -- South Africa
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: vital:10211 , http://hdl.handle.net/10948/1572 , Bullying in the workplace -- South Africa -- Prevention , Harrasment -- South Africa , Organizational behavior -- South Africa , Interpersonal relations -- South Africa , Labour laws and legislation -- South Africa
  • Description: A study is made of the ever-growing worldwide social pandemic of workplace bullying. We define workplace bullying in terms of its characteristics and distinguish it from unfair discrimination in the form of harassment. A survey is presented of its occurrence worldwide and how it manifests as an organisational conflict, both as hierarchical and horizontal abuse. This is analysed in terms of a social science perspective. We consider grievance reporting as an indication of trends in workplace bullying and discuss the limitations of such reporting. We review the consequent effects of such limitations on the health of workers and workplace efficiency and note the shortcomings of existing labour law in dealing with this inadequacy. Our findings are summarised, with recommendations for resolving this conflict situation.
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  • Date Issued: 2011

The principal factor : examining the role of principals in the success of their schools

  • Authors: Dubula, Nomvuyo Mildred
  • Date: 2011
  • Subjects: School principals -- Training of -- South Africa -- Eastern Cape , School improvement programs -- South Africa -- Eastern Cape , Educational leadership -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MPA
  • Identifier: vital:8240 , http://hdl.handle.net/10948/d1010881 , School principals -- Training of -- South Africa -- Eastern Cape , School improvement programs -- South Africa -- Eastern Cape , Educational leadership -- South Africa -- Eastern Cape
  • Description: In this Treatise, a study is undertaken to analyse and examine the role of school principals in the success of their schools; with specific reference to township high schools in the Port Elizabeth district (P.E. district). The study assumes that P.E. district principals, as leaders and managers should deliver essential services effectively, efficiently, and with optimal use of resources to attain maximum results in school performance. The same is expected of their counterparts in any part of the country, it is not exclusively demanded from PE district principals. In terms of the current education legislation and policy framework, the principals have to account for the performance of their schools. To this end the National Department of Education introduced legislation in 2007 to ensure that principals account to the Head of The Department of Education of the relevant province. Section 16 A of the South African Schools Act (SASA) was introduced by the Education Law Amendment Act 31/2007. The provisions of this section deal with “the functions and responsibilities of principals of public schools.” Specifically section 16A (1) (b) states that “The principal must prepare and submit to the Head of the Department an annual report in respect of: (i.) The academic performance of that school (ii.) The effective use of available resources.” Since the enactment of section 16 A as referred to above, the Provincial Departments have begun to make principals account for the success or failure of learners, for human resource development, financial management, parent involvement in school matters and the active participation of school governing bodies. What should be clear is that the above encompasses all the critical and fundamental aspects that have an impact on the progress of any educational institution. The combination of the two requirements stated above reflects the extent to which the Department of Education is committed to making certain that principals in their respective schools create an environment where learners can achieve their full potential. It is such creation of conducive environments that will enable all learners in the country to achieve equal opportunities in society irrespective of their original backgrounds. This ideal is consistent with section 9 of the Constitution, 1996 which provides for the right to equality of all people. The research, also assumes that leadership is about direction and purpose, while management lays emphasis on effectiveness and efficiency. Leadership and management are fundamental aspects of those duties and responsibilities associated with the position of a school principal. It is further postulated that, a good principal understands that circumstances determine the proportion of each of these elements that is required by any given situation i.e. whether more of leadership or bigger dose management is appropriate in dealing with a certain set of circumstances or not. The study identifies variables that make a school principal a strong leader and good manager and lists the following as the critical focus areas:  Balancing instructional and managerial leadership  Strengthening the connection between school and home  Developing effective leadership  Effective teaching practices  Staff development The study also assumes that township schools are no exception to those in different parts of the country. Despite some serious daily challenges peculiar to the township situations, these schools still have to perform satisfactorily like all other institutions of learning. The legislative and policy framework applies equally to all schools. The study argues primarily that all schools can perform well and develop the potential of their learners to the fullest. The difference lies in the leadership and management of the respective institutions by their principals. All stakeholders are presumed to posses the potential, the ability and the urge to do their utmost best to render quality services that would lead to the attainment of excellent results. It is worthwhile for the system that those who show themselves to lack these attributes should be identified, not to weed them out but to assist so that they acquire the necessary skills and expertise. After all it is by strengthening the weakest link that a chain becomes strong.
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  • Date Issued: 2011

The problems of proving actual or apparent bias: an analysis of contemporary developments in South Africa

  • Authors: Okpaluba, Chuks , Juma, Laurence
  • Date: 2011
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/127498 , vital:36017 , https://doi.org/10.17159/1727-3781/2011/v14i7a2616
  • Description: This article takes a critical look at the divergent approaches of courts in constructing the meaning of actual and apparent bias in adjudicative contexts. It argues that while proving actual bias on the part of an adjudicator may not always be easy and parties often revert to apprehended bias, an allegation of bias in any adjudication process is a matter that courts take very seriously. This notwithstanding, the courts have failed to consistently demarcate the necessary elements and threshold of proof that complainants must overcome to secure a successful challenge of decisions based on adjudicative impartiality. Upon critical evaluation of the decisions on the subject so far rendered, this article suggests that the pattern which has seemingly emerged is that which weighs the allegations of bias against the presumption of impartiality and the requirements of the double reasonableness test.
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  • Date Issued: 2011

The proposed new gambling tax in South Africa

  • Authors: Roberts, Justin Esrom
  • Date: 2011
  • Subjects: Gambling , Gambling -- Taxation , Gambling -- Taxation -- South Africa , Income tax deductions -- South Africa , Withholding tax -- Law and legislation -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:8950 , http://hdl.handle.net/10948/1639 , Gambling , Gambling -- Taxation , Gambling -- Taxation -- South Africa , Income tax deductions -- South Africa , Withholding tax -- Law and legislation -- South Africa
  • Description: In the 2011/2012 Budget Speech delivered by the Minister of Finance, Pravin Gordhan, it was announced that a 15% withholding tax on gambling winnings above R 25 000 was to be introduced with effect from 1 April 2012. This treatise was undertaken to critically analyse the different elements of the proposed new withholding tax. It was established that the fiscus already benefits significantly from the gambling industry and levies and taxes from the gambling industry dwarf the revenue SARS collect from other forms of taxes such as Donations tax and Estate Duty tax. The necessity, therefore, of taxing gambling winnings in the hands of the individual is debatable. A comparison with the three foreign countries used by the Minister as an example of countries who have successfully implemented a withholding tax on gambling winnings exposed operational or other characteristics which bear no significant relationship to the situation in which the industry operates in South Africa. Probably the most significant difference is the fact that in the three foreign countries, losses are deductible and only the net gains are taxed. Although it iv could add to an already seemingly administrative-intensive legislation, it is submitted that taxing gambling winnings and ignoring losses suffered by gamblers will be disproportionately unfair towards the taxpayer. The many questions raised in this treatise illustrate the level of uncertainty still surrounding the new proposed gambling tax. It is hoped that communication will be provided by SARS as soon as possible to address the issues at hand. This would go a long way in ensuring that the implementation of the proposed withholding tax on gambling winnings is as smooth and efficient as possible.
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  • Date Issued: 2011

The reading of extended text in Oshindonga in grade 2 in selected Namibian schools

  • Authors: Ngula, Elizabeth Njanjukweni-Aluhe
  • Date: 2011
  • Subjects: Ndonga language -- Study and teaching -- Namibia Reading comprehension -- Study and teaching (Primary) -- Namibia Reading (Primary) -- Namibia Teaching -- Namibia Teachers -- Attitudes -- Namibia Literacy -- Namibia
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1720 , http://hdl.handle.net/10962/d1003603
  • Description: This study was conducted in order to understand to what extent Grade 2 teachers use books (or other forms of extended text) in their reading lessons in Oshindonga where very little published material is available, and, if so, whether they engage in shared reading with these materials or not. The study also explored ways to introduce more books (or other forms of extended text) into Oshindonga classrooms. The study took the form of an interpretive case study. It was conducted in two primary schools in Otjiwarongo district in the Otjozondjupa region of Namibia. Two qualified Grade 2 teachers were selected. The purpose of this sampling was to gain an in depth understanding of how these two selected teachers taught reading in Oshindonga. The data was gathered by using semi-structured interviews with open-ended questions, as well as lesson observations and stimulated recall with each individual teacher after each lesson. The purpose of this was to gain clarity in areas that were not clear during lesson presentations. A focus group interview was also conducted in order to generate ideas about how to introduce more extended texts into the classroom. The key fmdings are that both schools in the study lacked books in Oshindonga, and the teachers lacked an understanding of the importance of using books (or other forms of extended text). Other key findings are that teachers had a problem in choosing appropriate texts to read with their learners; teachers understand reading more as decoding than reading for meaning and pleasure; children were not asked any comprehension questions and the two teachers had different views on the value of shared reading. The research data revealed that there are problems in teaching literacy in Namibian African languages.
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  • Date Issued: 2011

The relationship between financial development and manufacturing sector growth: evidence from Southern African Customs Union countries

  • Authors: Moshabesha, Mosili
  • Date: 2011
  • Subjects: Economic development -- Case studies -- Africa, Southern Entrepreneurship -- Case studies -- Africa, Southern Southern African Customs Union
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:990 , http://hdl.handle.net/10962/d1002725
  • Description: Extensive research has been done on the relationship between financial development (FD) and growth (with the main focus on economic growth). Theoretical models and most of the conclusions reached stipulate that the development of a financial system is one of the essential ingredients for economic growth. A developed financial system is able to provide financial services efficiently to the real sector. This study examines the relationship between FD and manufacturing sector growth of the SACU countries. The study first reviews the theoretical and empirical literature of FD and growth (economic and manufacturing sector). This gives a full understanding of the topic before attempting to empirically study it. It also helps in the selection process of the model and variables to be employed in the study. A balanced panel for four SACU countries, namely Botswana, Lesotho, RSA and Swaziland, for the period 1976 to 2008 was estimated using Zellner‟s Seemingly Unrelated Regression Estimation (SURE) method. Namibia was omitted because of limited data. The SURE model was selected because it performs better than ordinary least squares (OLS) estimation of individual equations in cases where the countries studied can be affected by similar external shocks because they are in the same economic region and also have country specific structural differences which could affect their economic growth. Two measures of FD were used: credit to the private sector provided by commercial banks (FIC) and the ratio of liquid liabilities of commercial banks to GDP (LL). Manufacturing sector growth was measured by manufacturing value added to GDP. The results of the relationship between manufacturing growth and FD were very weak across the countries. The model that used FIC performed better, there was a negative significant relationship found in RSA and Swaziland, while with the model that used LL, all the countries gave an insignificant relationship. The results for Swaziland were very consistent with the past findings of the relationship between FD and economic growth in the country (for example Aziakpono (2005a)). This may be because of the high share of the manufacturing sector in GDP. Theory suggests that a well-developed financial system will have a positive impact on growth, but this was not the case in RSA and Botswana, where in some cases FD had a negative impact on the growth of the sector. The analysis of the countries‟ manufacturing sector development shows that the sector plays an important role in the economies of the SACU countries, especially in terms of employment and exports. The coefficients of trade openness are generally positive, though not significant in some cases. The other control variables gave mixed results across the counties and across the models. Based on the findings, the countries have to develop strategies that will improve entrepreneurial skills. Also the financial development in the small SACU countries is essential in order for all the sectors in the economy to benefit from the financial sector and in turn increase economic growth.
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  • Date Issued: 2011

The relationship between self-efficacy and ways of coping of first-year university students

  • Authors: Goss, Joanne Kate
  • Date: 2011
  • Subjects: Self-efficacy , Control (Psychology)
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9860 , http://hdl.handle.net/10948/1555 , Self-efficacy , Control (Psychology)
  • Description: This is a quantitative, exploratory study focusing on self-efficacy and ways of coping of male and female first-year psychology students at a university in the Nelson Mandela Metropole. The study aimed to explore and describe the relationship between The General Perceived Self- Efficacy Scale and the Ways of Coping Questionnaire of first-year university psychology students. A non-probability convenience sampling technique was employed. The sample consisted of 34 males and 94 females between the ages of 18 and 21 years, who were registered for a first-year psychology module. Descriptive and inferential statistics were used to analyse the data. The results showed moderate correlations between general perceived self-efficacy and problem-focused and focusing on the positive as ways of coping. In addition, the results showed significant relationships between general perceived self-efficacy and problem-focused coping, seeking social support and focusing on the positive as ways of coping. Gender differences with regards to the constructs of coping and self-efficacy were also explored. Limitations of the present research were noted and recommendations for future research were proposed.
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  • Date Issued: 2011

The relationship between Union Representatives and school management teams in the Tsolo District: implications for school management

  • Authors: Maqhubela, V
  • Date: 2011
  • Subjects: School management -- Labour Unions
  • Language: English
  • Type: Thesis , Masters , M Ed
  • Identifier: vital:18416 , http://hdl.handle.net/11260/d1006573
  • Description: This dissertation is a report of the study that was conducted in rural schools of Tsolo district in Eastern Cape Province of South Africa. The study was about the relationship between union representatives and school management teams. The study was conducted because the researcher is a site steward in the present school where the researcher working and is always dealing with conflicts that usually occur between the S.M.T and Union members and has to address these issues regularly. This problem made the researcher to be interested and want to know further from other schools of what is the situation. This was done through focus group interviews and the study was qualitative research paradigm. There were questions that were drafted and participants were asked to respond according to the questions. The participants were as follows 11 SMT members and 18 union representatives. The study findings highlighted the role that SMT could play in the smooth running of the school and in addressing tensions to enhance effective work. The study also illuminated the issue of being bias among the SMT in some unions and dictatorship by S.M.T members. The study findings highlight the role the S.M.T should play and the issue of consultation before any decision should be taken as an integral part. The study also showed that there was a need for schools to know the South African legislation so as to go along with correct rules and regulations when addressing different issues.
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  • Date Issued: 2011

The response of microalgal biomass and community composition to environmental factors in the Sundays Estuary

  • Authors: Kotsedi, Daisy
  • Date: 2011
  • Subjects: Algal blooms -- South Africa -- Sundays River Estuary
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:10609 , http://hdl.handle.net/10948/1434 , Algal blooms -- South Africa -- Sundays River Estuary
  • Description: The Sundays Estuary is permanently open to the sea and has been described as channel-like along its entire length with a narrow intertidal area (mostly less than 5 - 6 m in width). The estuary experiences regular freshwater inflow with large supplies of nutrients, derived from the Orange River transfer scheme and agricultural return flow. In particular, nitrate concentrations are high as a result of fertilisers used in the Sundays River catchment area. The objectives of this study were to measure microalgal biomass and community composition and relate to flow, water quality and other environmental variables. Surveys in August 2006, March 2007, February, June and August 2008 showed that salinity less than 10 percent mostly occurred from 12.5 km from the mouth and this was also where the highest water column chlorophyll a (>20 μg l-1) was found. Different groups of microalgae formed phytoplankton blooms for the different sampling sessions, which were correlated with high chlorophyll a. These included blooms of green algae (August 2006), flagellates (March 2007), dinoflagellates (June 2008) and diatom species (February and August 2008). The dominant diatom (Cyclotella atomus) indicated nutrient-rich conditions. Green algae and diatoms were associated with low salinity water in the upper reaches of the estuary. Flagellates were dominant throughout the estuary particularly when nutrients were low, whereas the dinoflagellate bloom in June 2008 was correlated with high ammonium and pH. Maximum benthic chlorophyll a was found at 12.5 km from the mouth in February, June and August 2008 and was correlated with high sediment organic and moisture content. Benthic diatoms were associated with high temperature whereas some species in June 2008 were associated with high ammonium concentrations. The middle reaches of the estuary characterise a zone of deposition rather than suspension which would favour benthic diatom colonization. Phytoplankton cells settling out on the sediments may account for the high benthic chlorophyll a because maximum water column chlorophyll a was also found in the REI zone (where salinity is less than 10 percent and where high biological activity occurs) in the Sundays Estuary. The estuary was sampled over five consecutive weeks from March to April 2009 to identify environmental factors that support different microalgal bloom species. Phytoplankton blooms, defined as chlorophyll a greater than 20 μg l-1, were found during Weeks 1, 4 and 5 from the middle to the upper reaches of the estuary. Diatom species (Cylindrotheca closterium, Cyclotella atomus and Cyclostephanus dubius) occurred in bloom concentrations during these weeks. These diatom species are cosmopolitan and indicate brackish nutrient-rich water. Flagellates were the dominant group in Weeks 2 to 4, but positive correlations with chlorophyll a were found during Weeks 1 and 2. During the first week of this study the conditions were warm and calm (measured as temperature and wind speed) and there was a well developed bloom (38 μg l-1). There was a strong cold front from 17 to 19 March, which mixed the water column resulting in the decrease of the chlorophyll a levels (<20 μg l-1) and the bloom collapsed during Weeks 2 and 3. However, in Weeks 4 and 5 conditions were again calm and warmer, which appeared to stimulate the phytoplankton bloom. Nanoplankton (2.7 - 20 μm) was dominant during each week sampled and contributed a considerable amount (55 - 79 percent) to the phytoplankton biomass. Once again subtidal benthic chlorophyll a and water column chlorophyll a were highest 12.5 km from the mouth. Deposition of phytoplankton cells from the water column was evident in the benthic samples. The study showed that the Sundays Estuary is eutrophic and characterised by microalgal blooms consisting of different phytoplankton groups.
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  • Date Issued: 2011

The response of microalgal biomass and community composition to environmental factors in the Sundays estuary

  • Authors: Kotsedi, Daisy
  • Date: 2011
  • Subjects: Algal blooms -- South Africa -- Sundays River Estuary , Estuaries -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:10636 , http://hdl.handle.net/10948/d1013611
  • Description: The Sundays Estuary is permanently open to the sea and has been described as channel-like along its entire length with a narrow intertidal area (mostly less than 5 - 6 m in width). The estuary experiences regular freshwater inflow with large supplies of nutrients, derived from the Orange River transfer scheme and agricultural return flow. In particular, nitrate concentrations are high as a result of fertilisers used in the Sundays River catchment area. The objectives of this study were to measure microalgal biomass and community composition and relate to flow, water quality and other environmental variables. Surveys in August 2006, March 2007, February, June and August 2008 showed that salinity less than 10 percent mostly occurred from 12.5 km from the mouth and this was also where the highest water column chlorophyll a (>20 μg l-1) was found. Different groups of microalgae formed phytoplankton blooms for the different sampling sessions, which were correlated with high chlorophyll a. These included blooms of green algae (August 2006), flagellates (March 2007), dinoflagellates (June 2008) and diatom species (February and August 2008). The dominant diatom (Cyclotella atomus) indicated nutrient-rich conditions. Green algae and diatoms were associated with low salinity water in the upper reaches of the estuary. Flagellates were dominant throughout the estuary particularly when nutrients were low, whereas the dinoflagellate bloom in June 2008 was correlated with high ammonium and pH. Maximum benthic chlorophyll a was found at 12.5 km from the mouth in February, June and August 2008 and was correlated with high sediment organic and moisture content. Benthic diatoms were associated with high temperature whereas some species in June 2008 were associated with high ammonium concentrations. The middle reaches of the estuary characterise a zone of deposition rather than suspension which would favour benthic diatom colonization. Phytoplankton cells settling out on the sediments may account for the high benthic chlorophyll a because maximum water column chlorophyll a was also found in the REI zone (where salinity is less than 10 percent and where high biological activity occurs) in the Sundays Estuary.
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  • Date Issued: 2011

The right to organise: critiquing the role of trade unions in shaping work relations in post-apartheid South Africa

  • Authors: Nyathi, Mthokozisi
  • Date: 2011
  • Subjects: Labor unions -- South Africa , Apartheid -- South Africa , Industrial relations -- South Africa , Labor unions -- Law and legislation -- South Africa , Labor -- South Africa
  • Language: English
  • Type: Thesis , Masters , LLM
  • Identifier: vital:3690 , http://hdl.handle.net/10962/d1003205 , Labor unions -- South Africa , Apartheid -- South Africa , Industrial relations -- South Africa , Labor unions -- Law and legislation -- South Africa , Labor -- South Africa
  • Description: Organised labour continues to play a prominent role in shaping employment relations in South Africa. The individual worker is powerless and in a weaker bargaining position against his employer. The advent of democracy was accompanied by numerous interventions to level the historically uneven bargaining field. The trade union movement has made and consolidated significant gains since the advent of democracy. It however faces a plethora of new challenges, such as the negative forces of globalisation, declining membership (often associated with high levels of unemployment and the changing nature of work from standard to atypical employment), the resurfacing of adversarialism in the bargaining process, and numerous shortcomings inherent in forums established to facilitate corporatism. Business is intensifying its calls for investor-friendly policies, which effectively mean a relaxation of labour policies. The trade union movement faces an enormous task of rebuilding confidence and credibility among its members and at the same time showing some commitment to other social actors, government and business, that it is committed to contribute to economic growth and employment creation. The central focus of this thesis will be to highlight the gains made by the trade union movement, the numerous challenges threatening their existence, and how they have attempted to redefine their role in the face of these challenges. It will attempt to offer advice on how trade unions can continue to play a prominent role in shaping relations of work in South Africa. The study begins with a historical overview of trade unionism in South Africa. It then attempts to establish how trade unions have made use of the institution of collective bargaining, the importance of organisational rights to the trade union movement, the effectiveness of industrial action, and the emerging challenges threatening the vibrancy of trade unions. The overall aim is to assess whether the trade union movement is still a force to be reckoned with and its future role in influencing employment relations in South Africa.
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  • Date Issued: 2011

The role of cluster centre principals in the Ohangwena education region in Namibia

  • Authors: Nghatanga, Ponny Haggai
  • Date: 2011
  • Subjects: School management and organization -- Namibia -- Ohangwena School principals -- Namibia -- Ohangwena Educational leadership -- Namibia -- Ohangwena Educational change -- Namibia -- Ohangwena
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1748 , http://hdl.handle.net/10962/d1003632
  • Description: The Namibian Ministry of Education introduced the School Clustering System (SCS) in 1996. The system entails the grouping of schools into clusters to facilitate the sharing of resources and expertise. One school in a group is selected to serve as the Cluster Centre and the principal of the centre is identified as the Cluster Centre Principal (CCP). This has created a new level of educational leadership which is still relatively under-researched and the primary purpose of this study is to investigate the perceptions of this new role since it is perceived to be pivotal to the effective functioning of the cluster. This study is an interpretive case study of Cluster Centres in the Komesho Circuit in the Ohangwena Educational Region. Three data collection instruments were used, namely document analysis, observation and interviews. The collected data provided insight into participants' views on the role of Cluster Centre Principals (CCPs), which shed light on the challenges faCing the roles of CCPs. The findings revealed that respondents welcomed the decentralisation of an education system that involves cluster members and parents in decision making. Furthermore, the perceived role of CCPs is perceived as delegation through participative leadership and management approaches. This involves groups in teamwork to enhance the quality of teaching and learning. The study has, however, also exposed tensions surrounding the role and function of CCPs. This is partly because the role has not been formalised and is perceived as existing in a legal vacuum. This study will benefit the Cluster Centre Principals, Inspectors of Education, Advisory Teachers, non-governmental Organisations, the community and the Ministry of Education by placing the role of Cluster Centre Principals in perspective.
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  • Date Issued: 2011

The role of eutrophication in the biological control of water hyacinth, Eichhornia crassipes, in South Africa

  • Authors: Coetzee, Julie A , Hill, Martin P
  • Date: 2011
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/69263 , vital:29474 , https://doi.org/10.1007/s10526-011-9426-y
  • Description: South Africa has some of the most eutrophic aquatic systems in the world, as a result of the adoption of an unnecessarily high 1 mg l-1 phosphorus (P) standard for all water treatment works in the 1970 s. The floating aquatic macrophyte, water hyacinth (Eichhornia crassipes (Mart.) Solms (Pontederiaceae), has taken advantage of these nutrient rich systems, becoming highly invasive and damaging. Despite the implementation of a biological control programme in South Africa, water hyacinth remains the worst aquatic weed. A meta-analysis of published and unpublished laboratory studies that investigated the combined effect of P and nitrogen (N) water nutrient concentration and control agent herbivory showed that water nutrient status was more important than herbivory in water hyacinth growth. Analysis of long-term field data collected monthly from 14 sites around South Africa between 2004 and 2005 supported these findings. Therefore, the first step in any water hyacinth control programme should be to reduce the nutrient status of the water body.
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  • Date Issued: 2011

The role of Hsp90 in the Wnt pathway of MCF7 breast cancer cells

  • Authors: Cooper, Leanne Claire
  • Date: 2011
  • Subjects: Cancer -- Treatment , Heat shock proteins , Cancer cells , Molecular chaperones
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3985 , http://hdl.handle.net/10962/d1004044 , Cancer -- Treatment , Heat shock proteins , Cancer cells , Molecular chaperones
  • Description: Breast cancer is one of the most common forms of cancer in not only South African women, but women all over the world. The molecular chaperone heat shock protein 90 (HSP90) is upregulated in cancer and is almost exclusively associated with proteins involved in intracellular signal transduction, thus it plays an important role in signalling pathways within the cell. In cancer, there is an aberrant activation of the Wnt signaling pathway, which results in stabilized β-catenin being able to translocate to the nucleus where it can trigger the transcription of oncogenes found to be involved in the self-renewal of cells. The level of β-catenin is usually kept in check by a destruction complex comprising glycogen synthase kinase 3-beta (GSK-3β), axin1, adenomatous polyposis coli (APC) which phosphorylate β-catenin, resulting in its ubiquitination and degradation. HSP90 has been found to be associated with GSK-3β, but whether this association is only transient is debatable. Very little is known about the association of HSP90 with other members of the Wnt pathway in breast cancer. In this study, we have attempted to further identify the direct associations between HSP90 and GSK-3β, β-catenin, p-β-catenin and axin1. Immunofluorescence and confocal microscopy co-localization studies suggested a potential association between HSP90 and these proteins. Treatment with HSP90 inhibitors, 17-AAG and novobiocin resulted in a shift of axin1 to what appeared to be the plasma membrane. The associations of HSP90 with GSK-3β, β-catenin, p-β-catenin and axin1 were confirmed biochemically by co-immunoprecipitation and inhibition using 17-AAG, geldanamycin and novobiocin. We showed, for the first time that HSP90 is associated in a possible complex with β-catenin, p-β-catenin and axin1 therefore is potentially involved in the modulation of p-β-catenin in the Wnt pathway through the stabilization of the destruction complex.
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  • Date Issued: 2011

The role of memory, museums and memorials in reconciling the past : the Apartheid Museum and Red Location Museum as case studies

  • Authors: Sippel, Elizabeth
  • Date: 2011
  • Subjects: Apartheid Museum (Johannesburg, South Africa) Red Location Museum (Port Elizabeth, South Africa) Atrocities -- Museums Apartheid and art Apartheid -- History Historical museums Collective memory Memorialization History -- Psychological aspects Memory (Philosophy) Museum exhibits -- Historiography Museums -- Historiography
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2440 , http://hdl.handle.net/10962/d1005773
  • Description: When South Africa became a democracy, many of its cultural institutions were tainted by the stigma of having been tools for the production and propagation of apartheid ideology. This thesis examines two key facets of post-apartheid museums and memorials. Firstly, how they have repositioned themselves as institutions of cultural and social standing. Secondly, their role as tools of nation building, social change, and creators of national collective memory within the new democratic South Africa. Through an analysis of cultural memory theory pertaining to museology, this study elaborates on the methods employed by museums to incorporate memory into their narratives and in turn, transfer collective memory to their viewers. This thesis provides a comparative study of the architectural, memorial and museological strategies of two post-apartheid museums; the Red Location Museum and the Apartbeid Museum. It examines the contributions of both museums to the introduction of new museological strategies for the successful creation and transmission of South African collective memory. Through this analysis, both the invaluable contributions and the drawbacks of post-apartheid museums as tools for the promotion of new democratic ideologies and philosophies are considered. This thesis does not resolve the arguments and questions which have surfaced regarding cultural institutions as tools for the promotion of reconciliation and the construction of national collective memory within South Africa. As the current climate of memorialisation is one of change and paradox, it is presently impossible to fully quantify post-apartheid museums' roles within South Africa's move toward reconciliation and social change. However, the examination of both the Red Location Museum and the Apartheid Museum reveals the extraordinary change that South African cultural institutions have undergone in addition to their potential to become institutions which facilitate active reconciliation as well as social and cultural growth.
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  • Date Issued: 2011

The role of non-timber forest products in household coping strategies in South Africa: the influence of household wealth and gender

  • Authors: Paumgarten, Fiona , Shackleton, Charlie M
  • Date: 2011
  • Language: English
  • Type: Article
  • Identifier: vital:6648 , http://hdl.handle.net/10962/d1006897
  • Description: The prevalence and ranking of non-timber forest products (NTFPs) as safety-nets has been well discussed, but rarely quantified. We report on group discussions and household interviews in two South African villages to assess the frequency and nature of shocks and stresses over a 2-year period and the coping strategies employed, stratified by household wealth and gender of the de jure household head. Overall, kinship was the most widely adopted coping strategy, and NTFPs were the fifth most prevalent (employed by 70% of households). There were relatively few differences in the nature of shocks or responses between male- and female-headed households. Wealth influenced the experience of shocks or stresses as well as responses. Poorer households have fewer options with the increased use or sale of NTFPs being the second most commonly adopted strategy. Increased use and sale of NTFPs is a common manifestation of the safety-net function. To reconcile long-term economic development and biodiversity conservation, it is important to understand people’s use of natural resources and the factors that affect this use, including their responses to shocks and stresses.
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  • Date Issued: 2011
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