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An Investigation into Social Factors Contributing to Intimate Partner Violence. A Case Study of Tentergate Village, Enoch Mgijima Municipality

  • Authors: Ndubane, Masimbonge
  • Date: 2019
  • Subjects: Intimate partner violence
  • Language: English
  • Type: Thesis , Masters , MSoc (Anthropology)
  • Identifier: http://hdl.handle.net/10353/16474 , vital:40723
  • Description: This study sought to investigate social factors contributing to intimate partner violence in Tentergate village. Intimate partner violence or intimate personal violence, a matter once considered private, has gained increased attention as a public health crisis. In their efforts to better understand and prevent this behavior, social science researchers have discovered the link between gender inequality, early exposure to violence, spousal abuse and family conflicts. This paper uses social feminist, social learning and family violence theory to explain intimate partner violence. Participants‘ perceptions were assessed through systematic analysis. Quantitative and qualitative analysis was done on data obtained from interviews conducted on 30 women informants. The study revealed that there are several social factors contributing to intimate partner violence. In the final analysis, it argues that effective treatment and prevention should include both criminal justice and public health strategies.
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  • Date Issued: 2019

Evaluation of pre-treatment methods on production of bioethanol from bagasse and sugarcane trash

  • Authors: Dodo, Charlie Marembo
  • Date: 2019
  • Subjects: Lignocellulose
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10353/15387 , vital:40403
  • Description: A variety of methods have been researched on for bioethanol preparation from different feedstocks. Amongst the available feedstock, one such feedstock is the sugarcane plant. In most of the research on bioethanol preparation with sugarcane the sugary juice has been widely used, with the bagasse and trash having been discarded as waste. The “waste” bagasse and trash are usually removed and thrown away or burnt during harvesting or in sugar mills to supplement energy requirements. This research on lignocellulosic bagasse and trash was done so as not to discard them but to rather find ways in which to use this biomass constructively. Alternatives to burning that can potentially add value to this biomass need to be researched on by evaluating their hydrolysis content. The different lignocellulose pretreatment methods of concentrated and dilute acid pretreatment, with subsequent enzyme hydrolysis as well as alkali and oxidative alkali pretreatment with enzyme hydrolysis were experimented on the bagasse and trash for hydrolysis efficiency and effectiveness. There are two types of acid hydrolysis which were investigated on which are concentrated and dilute sulphuric acid pretreatments. Use of concentrated sulphuric acid yielded the highest amounts of reducing sugars but also resulted in the highest amounts of downstream process inhibitors formation. This resulted in the need for neutralisation steps which in turn increase the overall costs of using this method to obtain reducing sugars. It has however the advantage of occurring at a faster rate, within minutes or hours, than using biological enzymes which took days, up to 72 hours to obtain the highest reducing sugar amounts. Dilute sulphuric acid pretreatment offered the advantage of using fewer chemicals which are therefore less severe on equipment and result in fewer fermentation inhibitors being formed. Dilute sulphuric acid hydrolysis also takes a relatively shorter period than biological methods of pretreatment. A challenge of fermentation inhibitors formed during acid hydrolysis was countered by using the methods of overliming (calcium hydroxide) and comparing it to neutralization with sodium hydroxide. Alkali pretreatment with sodium hydroxide was researched on by applying different pretreatment concentrations during experiments on the lignocellulosic biomass. There was an increase in the available quantities of cellulose with a significant reduction in lignin with pretreatment. Alkali pretreatment proved effective in exposing the cellulose which made v more cellulose surface area available to cellulase enzymes for enzyme hydrolysis. The highest yield of reducing sugars was obtained from hydrolysates pretreated with 0.25 M sodium hydroxide for 60 min and a period of 72 h of enzyme hydrolysis. In general the longer the pretreatment time the more reducing sugars were produced from the enzyme hydrolysis. Alkali peroxide pretreatment also resulted in significant reductions in lignin quantities of lignocellulose material. In this method sodium hydroxide in combination with hydrogen peroxide were used in pretreating the biomass. Hydrolysates with even fewer fermentation inhibitors were produced as a result. The highest percentage concentration of cellulose of 63% (g/g) was achieved after pretreatment of bagasse with 5% alkali hydrogen peroxide and trash with 0,25M sodium hydroxide pretreatment. Pretreatment of biomass using alkali with subsequent enzymatic hydrolysis gave the highest yields of fermentable sugars of 38% (g/g) using 7% (v/v) alkali peroxide pre-treated trash than 36% (g/g) for 5% (v/v) with the least inhibitors. Reducing sugar yields of 25% (g/g) and 22% (g/g) were obtained after pretreatment with concentrated and dilute acid respectively. Neutralization of the acid hydrolysates was necessary to reduce inhibitors formed with neutralisation by sodium hydroxide resulting in low dilutions and loss of fermentable sugars as unlike in the case of overliming. Subsequent steps of fermenting the reducing sugars resulting from pretreatment into bioethanol were based on using the yeast Saccharomyces cerevisae. Pretreatment hydrolysates from alkali peroxide experiments produced higher bioethanol yields of 13.7 (g/l) after enzyme hydrolysates versus 6.9 (g/l) bioethanol from dilute acid hydrolyzates. A comparison of the effects of time showed there was more bioethanol yield of 13.7 (g/l) after 72 h of fermentation with the yeast versus 7.0 (g/l) bioethanol after pretreatment for 24 h. The only drawback is the longer fermentation period which thus reduces the process and so reduces the value of the increase in yield
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  • Date Issued: 2019

The role of information technology in the management of records in the Department of Sports, Recreation, Arts and Culture, Eastern Cape

  • Authors: Mdingi, Nomaciko
  • Date: 2019
  • Subjects: Records -- Management Information technology
  • Language: English
  • Type: Thesis , Masters , M.LIS
  • Identifier: http://hdl.handle.net/10353/17630 , vital:41130
  • Description: Information Technology (IT) has offered new and different ways in the management of records and distribution of information. Due to IT, records and information are accessed easily, appropriately preserved, quickly retrieved and managed for operational decision-making. Consequently, the main aim of this study was to investigate the role of IT in the management of records with specific reference to the Department of Sports, Recreation, Arts, and Culture, King Williams Town, Eastern Cape. It further examined the types of records created by the department and the current status of its records, compliance to the legal framework for both paper-based and electronic records management, skills and knowledge of staff, archivists and records managers in relation to information technology and the management of electronic records and the constraints the Department of Sports, Recreation, Arts, and Culture encounter in the management of electronic records and recommend possible solutions. One major finding unearthed by this study is that the department is still manually storing records even though the information technology revolution has evolved. The study also found out that the department is faced with a number of challenges when it comes to the responsibility for the implementation of IT in the department. The study put forward a number of recommendations that had to be considered in an attempt to help the department and its employees manage electronic records and tone is mentioned here as this is a prerequisite. It will be beneficial if all the officials that deal with records take the course on records and archives management in institutions like University of Fort Hare so that they know more about the management of records as a whole package.
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  • Date Issued: 2019

The design of an urban hydroponicum: an urban agriculture facility that remediates polluted storm water by utilizing biomimetic processes, that enables vast amounts of food to be grown

  • Authors: Bagg, Timothy Kyle
  • Date: 2017
  • Subjects: Architecture, Industrial -- South Africa -- Port Elizabeth , Architecture -- South Africa -- Port Elizabeth -- 21st century , Sustainable urban development , Sustainable buildings
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/38783 , vital:34965
  • Description: This treatise is founded in a belief that urban ecosystems should not be separate from natural ones and seeks to find ways in which existing urban systems can be reintegrated. This reintegration will be two-fold, providing a remedy for ecologically destructive urban systems as well as providing an opportunity to develop a holistic and sustainable alternative to current practices that generate waste and pollution. The treatise will focus on the management of polluted storm water, specifically along the Walmer catchment area which flows east into Airport Valley and Shark River Valley, and ways in which horticulture building systems can be utilised to achieve remedial action naturally, producing vast amounts of nutritious food for the surrounding community in the process. Impetus for this topic grew out of a concern that the author has for the current state of sustainable practices within South Africa, specifically regarding the relationship between water and agriculture (food). 60 – 70% of South Africa’s water demand is agricultural, with poor water management infrastructure and the current drought severely affecting the agricultural output (food supply) of the country. The increased demand puts immense pressure on South African farmers who have dwindling arable land and less water with which to cultivate crops. South Africa’s population is two thirds urbanised, meaning that most of the population lives in urban centres around the country. This treatise proposes that water-wise urban agricultural systems could be utilised to further cement food and water security in an urban setting by supplementing the food supply chain with local, city-grown produce. The research conducted will generate an architectural and urban intervention that marries the natural with the built environment in a strategically and intentionally designed relationship that exploits synergies between these two environments.
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  • Date Issued: 2017

External financial flows, domestic savings and economic growth in the Southern African development community (SADC)(1980-2013)

  • Authors: kapingura, Forget Mingri
  • Date: 2016
  • Subjects: International finance Saving and investment -- South Africa Capital movements
  • Language: English
  • Type: Thesis , Doctoral , Degree
  • Identifier: http://hdl.handle.net/10353/5198 , vital:29100
  • Description: .Most countries in the SADC region experience low levels of domestic savings. This calls for the need to explore other sources of financial flows to bridge the gap between domestic capital demand and supply, and one such source is external financial flows. It is with this background that this study examined the relationship between the different forms of external financial flows, domestic savings and economic growth in the SADC region for the period from 1980 to 2013. Firstly the study examined the impact of the different forms of external financial flows on economic growth in the region. The empirical results revealed that FDI, CBF and remittances have a significant impact on economic growth in the SADC region. ODA was however found to be insignificant. When the different types of external financial flows were interacted with institutions they all became significant in explaining economic growth in the region. The second aspect was to examine the extent to which external financial flows complement or displace domestic saving. The empirical results revealed that external financial flows with the exception of ODA complement domestic savings in the region. In addition, there is evidence of investment generating additional savings in the region, which is likely to be through the economic growth channel. The last objective of the study was to examine the determinants of external financial flows to the SADC region. The empirical results revealed that both push and pull factors are important in determining external financial flows in the region. Of great importance was the observation that events in the source country determine financial flows to the region. Proxy for financial integration was found to be positive though insignificant, pointing out that the region may not be benefiting from cross-border bank flows due to the region being disintegrated. This suggests that the region may benefit from increased cross-border bank flows if the region is integrated. Overall, the results from the study suggest that external financial flows are important to the region in providing the much needed development finance. However this also suggests that the foreign capital channel is another source in which a crisis from a developed country can be transmitted to the SADC region.
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  • Date Issued: 2016

Social assistance strategies as means of addressing poverty: lessons for South Africa

  • Authors: Mampuru, Tsebo
  • Date: 2016
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: http://hdl.handle.net/10962/4098 , vital:20607
  • Description: Poverty is a daily reality which a majority of South Africans live with. Social security in the form of cash grants has been the main poverty reduction instrument, albeit with limited success. The thesis aims to propose improvements which can be made in the government’s current social protection system and formulate alternative directions towards reducing poverty. An overview of the three most researched social security strategies around the world (i.e. Nordic, Latin American, and U.S. models) revealed two dominant instruments: conditionality and universalism. If applied in South Africa, universalism may be costly and unsustainable unless the right funding method is used. Attaching education and health attainment conditions to an adult grant would be inefficient and even burdensome to recipients. In terms of child grants, there is little evidence to suggest that the demand for and private levels of investment in education and health are insufficient. Therefore attaching health and education conditions to social grants may only serve to highlight the severe supply side inefficiencies in South Africa. Attaching marriage as an alternative condition may disadvantage poor and needy beneficiaries as marriage is an expensive institution in South Africa. Furthermore, enforcing the marriage condition would violate the constitutional rights of recipients who do not necessarily place a high value on the institution. To strengthen the poverty reduction efficiency of social grants and reduce dependency, the thesis suggests that social cash grants, regardless of whether universal and/or conditional or neither, should be temporary and used in conjunction with other strategies which encourage inclusive economic growth. Social assistance alone will not reduce poverty and ultimately, inclusive economic growth remains a more viable approach to reducing poverty. How to achieve the required inclusive economic growth in South Africa therefore provides further research opportunities.
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  • Date Issued: 2016

An assessment of the Auditor General's contribution to good governance in the public service: a case of the Eastern Cape provincial administration

  • Authors: Khashe, Sivuyile Churchill
  • Date: 2015
  • Subjects: Auditing -- South Africa -- Eastern Cape , Civil service -- South Africa -- Eastern Cape Finance, Public -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MPA
  • Identifier: http://hdl.handle.net/10353/1654 , vital:27500
  • Description: The Office of the Auditor -General’s role is by no means minor, for it plays a major role in curbing corruption and acts as a ‘’watchdog’’ of the nation over public funds. Amidst high mismanagement and misuse of public resources, as well as corruption, especially in developing countries, the major question one asks is how effective the Auditor -General can be in ensuring good governance within state departments so as to improve service delivery. The gaps between approved budgets and the realisation of policy and development goals stand among key governance challenges in many developing countries. Supreme Audit Institutions (SAIs) play an important role in holding governments to account. However, many SAIs including AGSA face serious challenges when trying to evaluate the expenditures and performance of government agencies. Therefore this study suggests that more resources should be invested in the office of the AG so as to allow it to carry out its duties without impediments. Good governance and public finance accountability is becoming increasingly important in the public sector. One means of effecting good governance and accountability is through auditing. For this reason the Office of the Auditor-General through the Constitution of the Republic of South Africa 1996 (Act 108 of 1996 section 216 (1)) was established to facilitate and encourage good governance and effective accountability through auditing.
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  • Date Issued: 2015

An assessment of the Auditor General's contribution to good governance in the public service: a case of the Eastern Cape provincial administration

  • Authors: Khashe, Sivuyile Churchill
  • Date: 2015
  • Subjects: Auditing -- South Africa -- Eastern Cape , Civil service -- South Africa -- Eastern Cape , Public administration -- South Africa -- Eastern Cape , Political corruption -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , M Admin
  • Identifier: http://hdl.handle.net/10353/1675 , vital:27544
  • Description: The Office of the Auditor -General’s role is by no means minor, for it plays a major role in curbing corruption and acts as a ‘’watchdog’’ of the nation over public funds. Amidst high mismanagement and misuse of public resources, as well as corruption, especially in developing countries, the major question one asks is how effective the Auditor -General can be in ensuring good governance within state departments so as to improve service delivery. The gaps between approved budgets and the realisation of policy and development goals stand among key governance challenges in many developing countries. Supreme Audit Institutions (SAIs) play an important role in holding governments to account. However, many SAIs including AGSA face serious challenges when trying to evaluate the expenditures and performance of government agencies. Therefore this study suggests that more resources should be invested in the office of the AG so as to allow it to carry out its duties without impediments. Good governance and public finance accountability is becoming increasingly important in the public sector. One means of effecting good governance and accountability is through auditing. For this reason the Office of the Auditor-General through the Constitution of the Republic of South Africa 1996 (Act 108 of 1996 section 216 (1)) was established to facilitate and encourage good governance and effective accountability through auditing. To this end the study assesses the contribution made by the AGSA in encouraging good governance practices in government departments in the Eastern Cape Province.
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  • Date Issued: 2015

An evaluation of knowledge sharing as a knowledge management mechanism in public libraries in Cape Town, Western Cape Province , South Africa

  • Authors: Tatana, Vuyokazi
  • Date: 2015
  • Subjects: Knowledge management Information services Organizational learning
  • Language: English
  • Type: Thesis , Masters , Degree
  • Identifier: http://hdl.handle.net/10353/5138 , vital:29090
  • Description: This study aimed to investigate into knowledge sharing as a mechanism for managing knowledge in the City of Cape Town public libraries, Western Cape, South Africa. The study sought to achieve the following objectives: To find out the extent to which knowledge sharing takes place in the City of Cape Town public libraries; To establish how knowledge is shared between the less experienced and the more experienced librarians; To explore the influence of knowledge sharing on service delivery in the City of Cape Town public libraries; To identify and discuss the impediments to knowledge sharing the City of Cape Town public libraries; The findings of the study would provide insight useful in addressing the challenges that confront public libraries as far as knowledge sharing and is concerned. This study would assist to maintain the best practices of knowledge sharing in the City of Cape Town public libraries.This study would also help the City of Cape Town policy makers and library management to come up with knowledge‐sharing/ knowledge management intervention measures from an informed point of view.
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  • Date Issued: 2015

An investigation into how two Grade 11 Physical Science teachers mediate learning of the topic chemical equilibrium : a case study

  • Authors: Chani, Fungisisai M
  • Date: 2015
  • Subjects: Chemical equilibrium -- Study and teaching (Secondary) -- Namibia , Science -- Study and teaching (Secondary) -- Namibia
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:2023 , http://hdl.handle.net/10962/d1017334
  • Description: The Namibian Physical Science Higher Level Syllabus requires students to study the topic on chemical equilibrium. This section has proven to be one of the most difficult for Namibian learners as reflected by their poor responses to questions in the Grade 12 NSSC ‘H’ examinations. Triggered by these discoveries, I decided to conduct a research on how teachers mediate learning of the topic on chemical equilibrium in a Namibian context. Conducted at a private school in Windhoek, the study involved two experienced Grade 11 Physical Science teachers renowned for good results. I adopted a qualitative case study underpinned by an interpretive paradigm. Sense making of concepts on chemical equilibrium was my unit of analysis. To generate data, I used document analysis, semi-structured interviews, lesson observations, which were videotaped as well as stimulated recall interviews. Vygotsky’s mediation of learning and social constructivism blended with Shulman’s pedagogical content knowledge (PCK) were the theoretical frameworks adopted in the study. During the analysis process, there was grouping of data into categories. These included teacher-learner interactions as emphasized by Vygotsky’s mediation of learning and learners’ challenges according to PCK. I used an inductive approach to identify emerging themes from my data. The themes were colour coded and the developed into analytical statements. Data triangulation, member checking, and peer review ensured data validity and trustworthiness. Stimulated recall interviews conducted while watching the videos with the two teachers, complemented these approaches. My findings were that teachers extensively used various meditational tools such as prior knowledge, language, analogies and an equilibrium game to mediate learning. The teachers experienced numerous challenges during mediation of learning, including language difficulties and learners’ failure to comprehend complex chemical equilibrium concepts. Notwithstanding, the teachers in this study managed to some extent to overcome the challenges by exhibiting facets of advanced PCK.
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  • Date Issued: 2015

Photophysical studies of Zinc phthalocyanine-silica nanoparticles conjugates

  • Authors: Fashina, Adedayo
  • Date: 2015
  • Subjects: Nanoparticles , Phthalocyanines , Zinc , Silica , Photochemistry , Adsorption
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4537 , http://hdl.handle.net/10962/d1017917
  • Description: This thesis reports on the synthesis and characterization of both symmetrical and asymmetrical Zinc phthalocyanine complexes. The complexes contained groups such as carboxylic, amino and alkyne for covalent grafting to the surface of silica nanoparticles. The use of symmetrical and asymmetrical complexes was geared towards comparing the non-specific binding of the symmetrical complexes to the specific binding observed in the asymmetrical complexes. The complexes were also doped within the silica matrix and compared to the surface grafted conjugates. The complexes and the conjugates were well characterized with a variety of techniques. The fluorescence lifetimes of the phthalocyanine complexes containing either terminal carboxylic groups or an alkyne group showed a mono-exponential decay while the amino containing phthalocyanine complexes gave a bi-exponential decay. A similar trend was observed for their respective conjugates. Some of the conjugates of the asymmetrical complexes showed a decrease in fluorescence lifetimes and a corresponding decrease in fluorescence quantum yields. The fluorescence quantum yields for all the symmetrical complexes studied showed either an improvement or retained the luminescence of the grafted phthalocyanine complex. Most of the conjugates showed a faster intersystem crossing time in comparison to the complexes alone. The grafted or doped conjugates containing symmetrical phthalocyanine complexes with carboxyl groups showed improvements both in fluorescence and triplet quantum yields. All the conjugates except two showed an increase in triplet lifetimes when compared to their respective phthalocyanine complexes. Optical nonlinearities of nine of the phthalocyanine complexes were studied and all the complexes showed characteristic reverse saturable absorption behavior. Complex 10 showed the most promising optical limiting behavior. The aggregation and dissolution studies of the conjugates were also carried out in a simulated biological medium and the silicon level detected was noticed to have increased with incubation time.
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  • Date Issued: 2015

Nonlinear optical studies of metallophtalocyanines and hemiporphyrazines in solution

  • Authors: Britton, Jonathan
  • Date: 2014
  • Subjects: Phthalocyanines Photochemistry Nanoparticles Nanostructured materials Polymers Quantum dots
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4464 , http://hdl.handle.net/10962/d1011608
  • Description: This thesis presents the study of the effects of CdTe-TGA quantum dots (QDs) on optical limiting ability of different phthalocyanine (Pc) complexes (5-12) containing Zn, Ga, In central metals and substituted with benzyloxyphenoxy, phenoxy, tertbutylphenoxy and amino groups in solution and in poly (methyl methacrylate) (PMMA) films. The optical limiting parameters of Pcs were higher for tertbutylphenoxy when compared to benzyloxyphenoxy and phenoxy substituents, in DMSO. Non-peripheral substitution decreased the optical limiting parameters. Third-order susceptibility (Im[χ⁽³⁾]/α) values of Pcs in the absence and presence of CdTe QDs were in the 10⁻¹² to 10⁻¹° esu cm range. Hyperpolarizabilities (γ) ranged from 10⁻³¹ to 10⁻²⁹ esu L for Pc alone or in mixture with QDs. The effect on the optical limiting abilities of twelve embedded phthalocyanines containing In, Ga, Zn and Al as central metals in polymer thin films was also examined. The effect of forming a covalent link zinc tetraamino phthalocyanine (12) with poly (methyl acrylic acid) (PMAA) and Zn (13) and OHAl (14) octacarboxy phthalocyanines to polyethylenimine (PEI) was also studied. The hyperpolarizability of the twelve phthalocyanines in polymer was found to be in the range of 10⁻²⁶ to 10⁻²⁴ esu.L. This is significantly higher than the hyperpolarizabilities of these phthalocyanines in solution. Non-linear optical (NLO) parameters were determined for phthalocyanine complexes containing In, Ga and Zn as central metals when embedded in PMMA polymer in the presence of quantum dots (QDs). The QDs mainly employed were CdTe-TGA (TGA = thioglylcolic acid). Triplet lifetimes increased as k (excited state (σex) to ground state (σg) absorption cross section ratio) values decreased with the addition of the CdTe-TGA to the phthalocyanines. The saturation energy density (Fsat) values were smaller in the films when compared to the solutions. Complex 7 tetrasubstituted with tert-butylphenoxy groups at non-peripheral positions was also studied in the presence of CdS-TGA, CdSe-TGA, fullerenes and single walled carbon nanotubes. There is a general improvement in optical limiting ability of Pc complexes in the presence of nanomaterials (NMs). Degradation studies seem to indicate that placing a phthalocyanine within a polymer thin film may protect it slightly from photo- and thermal degradation. 3(4), 15(16)-Bis-(4 -tert-butyl-phenoxy)-10, 22-diaminohemiporphyrazinato chloroindium hemiporphyrazine was synthesized from 1, 3, 5-triaminobenzene and 4-tert-butyl-phenoxyisoindoline. The structure of the complex was confirmed using mass, nuclear magnetic resonance and infrared spectroscopies. The nonlinear parameters of the compound was also analyzed in dimethylformamide and found to be significantly greater than previously analyzed phthalocyanines.
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  • Date Issued: 2014

Numerical error analysis in foundation phase (Grade 3) mathematics

  • Authors: Ndamase- Nzuzo, Pumla Patricia
  • Date: 2014
  • Subjects: Error analysis (Mathematics) Numerical analysis Mathematics
  • Language: English
  • Type: Thesis , Masters , Degree
  • Identifier: http://hdl.handle.net/10353/5893 , vital:29415
  • Description: The focus of the research was on numerical errors committed in foundation phase mathematics. It therefore explored: (1) numerical errors learners in foundation phase mathematics encounter (2) relationships underlying numerical errors and (3) the implementable strategies suitable for understanding numerical error analysis in foundation phase mathematics (Grade 3). From 375 learners who formed the population of the study in the primary schools (16 in total), the researcher selected by means of a simple random sample technique 80 learners as the sample size, which constituted 10% of the population as response rate. On the basis of the research questions and informed by positivist paradigm, a quantitative approach was used by means of tables, graphs and percentages to address the research questions. A Likert scale was used with four categories of responses ranging from (A) Agree, (S A) Strongly Agree, (D) Disagree and (S D) Strongly Disagree. The results revealed that: (1) the underlying numerical errors that learners encounter, include the inability to count backwards and forwards, number sequencing, mathematical signs, problem solving and word sums (2) there was a relationship between committing errors and a) copying numbers b) confusion of mathematical signs or operational signs c) reading numbers which contained more than one digit (3) It was also revealed that teachers needed frequent professional training for development; topics need to change and lastly government needs to involve teachers at ground roots level prior to policy changes on how to implement strategies with regards to numerical errors in the foundational phase. It is recommended that attention be paid to the use of language and word sums in order to improve cognition processes in foundation phase mathematics. Moreover, it recommends that learners are to be assisted time and again when reading or copying their work, so that they could have fewer errors in foundation phase mathematics. Additionally it recommends that teachers be trained on how to implement strategies of numerical error analysis in foundation phase mathematics. Furthermore, teachers can use tests to identify learners who could be at risk of developing mathematical difficulties in the foundation phase.
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  • Date Issued: 2014

Malarial drug targets cysteine proteases as hemoglobinases

  • Authors: Mokoena, Fortunate
  • Date: 2012
  • Subjects: Malaria -- Chemotherapy , Antimalarials , Hemoglobin , Proteolytic enzymes , Cysteine proteinases , Plasmodium falciparum , Plasmodium vivax , Papain
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4005 , http://hdl.handle.net/10962/d1004065 , Malaria -- Chemotherapy , Antimalarials , Hemoglobin , Proteolytic enzymes , Cysteine proteinases , Plasmodium falciparum , Plasmodium vivax , Papain
  • Description: Malaria has consistently been rated as the worst parasitic disease in the world. This disease affects an estimated 5 billion households annually. Malaria has a high mortality rate leading to distorted socio-economic development of the world at large. The major challenge pertaining to malaria is its continuous and rapid spread together with the emergence of drug resistance in Plasmodium species (vector agent of the disease). For this reason, researchers throughout the world are following new leads for possible drug targets and therefore, investigating ways of curbing the spread of the disease. Cysteine proteases have emerged as potential antimalarial chemotherapeutic targets. These particular proteases are found in all living organisms, Plasmodium cysteine proteases are known to degrade host hemoglobin during the life cycle of the parasite within the human host. The main objective of this study was to use various in silico methods to analyze the hemoglobinase function of cysteine proteases in P. falciparum and P. vivax. Falcipain-2 (FP2) of P. falciparum is the best characterized of these enzymes, it is a validated drug target. Both the three-dimensional structures of FP2 and its close homologue falcipain-3 (FP3) have been solved by the experimental technique X-ray crystallography. However, the homologue falcipain-2 (FP2’)’ and orthologues from P.vivax vivapain-2 (VP2) and vivapain-3 (VP3) have yet to be elucidated by experimental techniques. In an effort to achieve the principal goal of the study, homology models of the protein structures not already elucidated by experimental methods (FP2’, VP2 and VP3) were calculated using the well known spatial restraint program MODELLER. The derived models, FP2 and FP3 were docked to hemoglobin (their natural substrate). The protein-protein docking was done using the unbound docking program ZDOCK. The substrate-enzyme interactions were analyzed and amino acids involved in binding were observed. It is anticipated that the results obtained from the study will help focus inhibitor design for potential drugs against malaria. The residues found in both the P. falciparum and P. vivax cysteine proteases involved in hemoglobin binding have been identified and some of these are proposed to be the main focus for the design of a peptidomimetric inhibitor.
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  • Date Issued: 2012

Intimate masculinities in the work of Paul Emmanuel

  • Authors: Bronner, Irene Enslé
  • Date: 2011
  • Subjects: Emmanuel, Paul, 1969- Masculinity in art Identity (Psychology) in art Gender identity in art Art, South African -- 21st century
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2397 , http://hdl.handle.net/10962/d1002193
  • Description: Paul Emmanuel is a South African artist who produces incised drawings, outdoor installations and prints (particularly intaglio etchings and manière noire lithographs). These focus on the representation of male bodies and experience. Having begun his career as a collaborative printmaker, since 2002, his work has become more ambitious as well as critically acclaimed. In 2010, his most recent body of work, Transitions, was exhibited at the Smithsonian Museum of African Art in Washington D.C. I propose that Emmanuel represents the male body as a presence that either is not easily seen or that actively disappears or erases itself. Its subjectivity, and the viewer’s engagement with it, may be characterised as one of intimacy, exposure, loss and vulnerability. Emmanuel’s work may be said to question conventions and ideals of masculinity while, at the same time, refusing any prescriptive interpretation. To develop this proposition, I examine specifically Emmanuel’s incising drawing technique that ‘holds open’ transitions in male lives. In these liminal moments, Emmanuel represents men as ‘seen’ to change state or status, thereby exposing the ongoing process of building masculine identities. Equally elucidatory is Emmanuel’s imprinting of his own body, which, in his use of “traces” that reveal the vacillation between presence and absence, makes contingently ‘visible’ this gendering process, and has particular implications for the expression of subjectivity in a contemporary South African context.
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  • Date Issued: 2011

Lead-radium dating of two deep-water fishes from the southern hemisphere, Patagonian toothfish (Dissostichus eleginoides) and Orange Roughy (Hoplostethus atlanticus)

  • Authors: Andrews, Allen Hia
  • Date: 2009
  • Subjects: Fishes -- Age determination , Fishes -- Southern hemisphere -- Longevity , Fishes -- Growth , Radioactive dating , Patagonian toothfish , Patagonian toothfish -- Fisheries , Orange roughy , Orange roughy -- Fisheries , Deep-sea fishes -- Southern hemisphere , Deep-sea fisheries , Deep-sea fisheries -- Southern hemisphere
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5295 , http://hdl.handle.net/10962/d1005140
  • Description: Patagonian toothfish (Dissostichus eleginoides) or "Chilean sea bass" support a valuable and controversial fishery, but the life history is little known and longevity estimates range from ~20 to more than 40 or 50 yr. In this study, lead-radium dating provided validated age estimates from juveniles to older adults, supporting the use of otoliths as accurate indicators of age. The oldest age groups were near 30 yr, which provided support for age estimates exceeding 40 or 50 yr from grow zone counts in otolith sections. Hence, scale reading, which rarely exceeds 20 years, has the potential for age underestimation. Lead-radium dating revealed what may be minor differences in age interpretation between two facilities and findings may provide an age-validated opportunity for the CCAMLR Otolith Network to reassess otolith interpretations. Orange roughy (Hoplostethus atlanticus) support a major deep-sea fishery and stock assessments often depend on age analyses, but lifespan estimates range from ~20 to over 100 yr and validation of growth zone counts remained unresolved. An early application of lead-radium dating supported centenarian ages, but the findings were met with disbelief and some studies have attempted to discredit the technique and the long lifespan. In this study, an improved lead-radium dating technique used smaller samples than previously possible and circumvented assumptions that were previously necessary. Lead-radium dating of otolith cores, the first few years of growth, provided ratios that correlated well with the ingrowth curve. This provided robust support for age estimates from otolith thin sections. Use of radiometric ages as independent age estimates indicated the fish in the oldest group were at least 93 yr. Lead-radium dating has validated a centenarian lifespan for orange roughy. To date, radium-226 has been measured in otoliths of 39 fish species ranging from the northern Pacific and Atlantic Oceans to the Southern Ocean. In total, 367 reliable radium-226 measurements were made in 36 studies since the first lead-radium dating study on fish in 1982. The activity of radium-226 measurements ranged over 3 orders of magnitude (<0.001 to >1.0 dpm.g⁻¹). An analysis revealed ontogenetic differences in radium-226 uptake that may be attributed to changes in habitat or diet. Radiometric age from otolith core studies was used to describe a radium-226 uptake time-series for some species, which revealed interesting patterns over long periods. This synopsis provides information on the uptake of radium-226 to otoliths from an environmental perspective, which can be used as a basis for future studies.
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  • Date Issued: 2009

The economic potential of small towns in the Eastern Cape Midlands

  • Authors: Reynolds, Kian Andrew
  • Date: 2009 , 2013-07-15
  • Subjects: Small cities -- South Africa -- Eastern Cape Economic geography -- South Africa -- Eastern Cape Economic development -- South Africa -- Eastern Cape Rural development -- South Africa -- Eastern Cape Local government -- South Africa -- Eastern Cape Agriculture -- Economic aspects -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:1057 , http://hdl.handle.net/10962/d1007492
  • Description: Small town economic decline has been experienced in many countries across the globe and can be explained through Geographical Economics, particularly the New Economic Geography, which suggests that agglomeration occurs as a natural outcome of high transportation and transactional costs. Yet despite the economic rationale behind their decline it is not an economic inevitability and there is evidence of towns in the United States, New Zealand and Canada that have reversed their economic fortunes. [n South Africa approximately 5 million people live in the 500 small towns and many more live in their rural hinterlands where povelty levels are extremely high within a national context. Within this context the thesis examines the current economic status and potential growth prospects of small towns in the Eastern Cape Midlands in South Africa in order to identify critical growth dri vers within small town economies. Five small towns were selected for the study via means of a purposive sample and were subjected to two regional modelling techniques, namely Shift-Share Analysis and Economic Base Theory to determine their current economic trends and past growth patterns, while a Social Accounting Matrix was utilised to identify important sectoral linkages, potential avenues for growth and evident leakages within small town economies. The sampled towns experienced negative economic growth trends between 1996 and 200 I, the primary loss in employment being accounted for by regional economic changes as opposed to national or industrial trends. The decline was more severely felt in primary/industrial sectors of the economy; evidence was found that manufacturing activities declined in all of the centres, despite the industry growing nationally. The Social Accounting Matrix highlighted strong links between the agricultural and services sectors within the national economy. Thus, considering that agriculture was identified as the primary economic driver within the region and the services sector the largest employer in all of the towns it is evident that the economic potential of the towns is to a certain extent linked to the success of agriculture in their hinterlands. Seven growth drivers, namely size, local economic development, existing markets, existing industries, infrastructure, municipal leadership and local entrepreneurs and were linked via means of a scoring framework to the sampled towns' economic potential. Whilst the results of actually determining a towns economic potential are not definitive the study does provide useful insights about the impact and potential role played by these drivers. Linked to this scoring framework and to Cook's (1971) hierarchy of places in the Eastern Cape Midlands four categories of towns were identified in the commercial falming areas and recommendations were made about appropriate developmental interventions at a municipal level, such as the need to retain local entrepreneurs and to invest in social amenities. Considering the evident need for development in rural areas the study provides critical insights into how to prioritise development strategies within small rural towns in commercial farming areas. In addition it would enable municipalities to critically reflect on their municipal Local Economic Development strategies and the relevance within the context of small towns. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
  • Full Text:
  • Date Issued: 2009

Effective management of an information technology professional's career

  • Authors: Tedder, Derek
  • Date: 2005
  • Subjects: Information technology -- Vocational guidance , Information technology -- Management , Knowledge management , Career development , Computer Science -- Vocational guidance , System analysis -- Vocational guidance
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1148 , http://hdl.handle.net/10962/d1004543 , Information technology -- Vocational guidance , Information technology -- Management , Knowledge management , Career development , Computer Science -- Vocational guidance , System analysis -- Vocational guidance
  • Description: The human resource is constantly cited as an organisation's greatest asset. In a rapidly changing technological environment this is most applicable to the Information Technology (IT) function. Organisations are experiencing IT human resource problems such as low satisfaction, early plateauing, high turnover, burnout, limited advancement potential, nominal corporate commitment, supervisory aversion, poor organisational culture, and exceptional compensation. These problems are directly related to the IT professional's career. There is a lack of information and awareness surrounding IT careers to deal effectively with these problems. The research aims to create increased awareness of IT careers and the inherent problems through the development of a career management model. The research aims to identify the factors that influence IT careers, provide career management with a means to measure compatibility of the factors, and suggest solutions to incompatibility. The solving of this problem will be of mutual benefit to both organisations and individuals as they seek to better manage IT careers. After reviewing research literature relating to career anchors, IT job types, IT skills portfolios, and career dynamics a model for Effective IT Career Management (EITCM) has been constructed. The model represents the dynamic interactions between individual, organisational, and dependent factors. The model examines the compatibility of these interacting factors by measuring the levels of relevant career variables. The model suggests appropriate career management techniques to increase the compatibility of the interacting factors. An empirical study was designed and launched online to provide data that would confirm the seven Critical Success Factors (CSF) relating to the proposed model. The responses from the members of the Computer Society of South Africa (CSSA) allowed the seven hypotheses derived from the CSFs to be tested. The results of the empirical study were positive but required modification to five of the CSFs before they could be confirmed. The EITCM model was modified to reflect the improved CSFs. An awareness of career influencing factors combined with active career management is advantageous to both IT professionals and their organisations.
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  • Date Issued: 2005

Heterologous expression of the helicoverpa armigera stunt virus in Saccharomyces cerevisiae

  • Authors: Venter, Philip Arno
  • Date: 2002
  • Subjects: Helicoverpa armigera Saccharomyces cerevisiae
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:3895 , http://hdl.handle.net/10962/d1003811
  • Description: Lepidopteran insects like Helicoverpa armigera, more commonly known as the cotton bollworm, are economically important pests of a wide variety of crops throughout the world. The Helicoverpa armigera stunt virus (HaSV), a tetravirus with a bipartite single-stranded positive-sense RNA genome, has great potential as a biological pesticide against H. armigera. The larger genomic strand of this virus (RNA1) encodes the viral replicase, while the other (RNA2) encodes the 71 kDa capsid protein precursor (p71). 240 copies of p71 assemble into a procapsid with the concomitant encapsidation of the viral RNA. This is followed by a complex maturation event that is characterized by the autoproteolytic cleavage of p71 into the 64 kDa capsid protein (P64) and a 7 kDa peptide (p7). The rearrangements that occur during maturation results in the formation of mature HaSV capsids that can thereupon deliver RNA to other susceptible host cells. The principal objective of the research described in this study was to demonstrate that this virus could be assembled in Saccharomyces cerevisiae. S. cerevisiae expression vectors were constructed for the production of p71. This protein was detected in cell lysates from two different strains of S. cerevisiae, both containing either chromosomal or episomal copies of an expression cassette for P71. A number of factors relating to the expression of P71 (e.g. strains used, expression loci and expression rate) and the preparation of protein extracts from S. cerevisiae (e.g. the presence of various protease inhibitors and salt concentrations) were examined to attain optimal levels of soluble p71. A small fraction of the optimized soluble p71 was shown to be in the form of virus-like particles (VLPs), with a yield of ≤10⁷ VLPs from a 1.5l culture of P71⁺ cells. These particles were exclusively in the procapsid form, had a similar buoyant density to that of wild-type HaSV and could undergo maturation when the pH was reduced to 5. S. cerevisiae vectors were constructed for the episomal expression of the HaSV genomic RNAs. These vectors directed the transcription of RNA1 and RNA2 transcripts, which had similar sizes to those of the HaSV genomic RNAs. Mature HaSV particles were purified from cells, transgenic for P71, RNA1 and RNA2, by way of two different virus purification protocols that were developed during this study. RT-PCR analyses on RNA-extracts from these particles demonstrated that RNA transcripts, which were produced in trans with p71, could be encapsidated by HaSV capsids in S. cerevisiae. A droplet-feed bioassay on H. armigera larvae demonstrated that the S. cerevisiae-derived HaSV particles caused impaired larval development. This response was correlated with the detection of HaSV RNA2 in RNA extractions from larvae that were used in this bioassay. The results that were generated through the course of this study, provided proof for the concept of the non-host production of infectious HaSV particles from S. cerevisiae. This work could serve as a foundation for future research on the development of an expression system for the large-scale production of this virus as a biopesticide.
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  • Date Issued: 2002

Permaculture as an aspect of environmental learning: an investigation into secondary school communities in Zimbabwe

  • Authors: Nyika, Mugove Walter
  • Date: 2002
  • Subjects: Permaculture -- Study and teaching (Secondary) -- Zimbabwe Land use -- Zimbabwe Land use -- Environmental aspects -- Zimbabwe Agriculture -- Zimbabwe Sustainable agriculture -- Zimbabawe
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1960 , http://hdl.handle.net/10962/d1008447
  • Description: The Schools and Colleges Permaculture (SCOPE) Programme in Zimbabwe has developed a process for use by schools in planning for the sustainable management of their land. The process is called Integrated Land-Use Design (ILUD) and is based on Permaculture principles. The ILUD process has so far been implemented in 54 pilot schools where it has been used to facilitate the re-design of the school grounds through the active participation of the students, staff and parents. The aim of this research was to investigate what environmental learning takes place during the implementation of the ILUD process and related activities, with a view to informing the improvement of the process. The research was conducted within the interpretive paradigm with particular use being made of the Symbolic Interactionist theoretical framework to explore the social situations in which the ILUD process has been applied. A purposive sample of two schools and five form 4 (grade 11) pupils from each school was selected for the study. The main data collection method was the structured interview. Other data were collected from nonparticipant observations and the analysis of documents, particularly photographs. The data was analysed using the constant comparative method. The findings point towards a significant contribution from the Permaculture activities to the environmental knowledge, environmental management skills and the positive environmental attitudes of the pupils. The work done at the two schools indicates the usefulness of the ILUD process as a tool for environmental action in the schools but its application in the communities was found to be limited by constraints such as lack of resources and the limited capacity of teachers to work in the field of adult education and training. It is recommended that Permaculture should be integrated into the secondary school curriculum if the momentum of the progress made so far is to be maintained. The SCOPE Programme itself needs to be strengthened for its work with communities. There is, for example, a need for adult education and training methods if the introduction of ILUD to the communities is to be successful.
  • Full Text:
  • Date Issued: 2002
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