Ecosexual digital war machines: minoritarian environmental desires in the age of new media
- Authors: Weideman, Lisa
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54828 , vital:47915
- Description: Today the (Transnational) State Apparatuses of neoliberal capitalism, ranging from educational institutions to mass media and financial institutions, have effectively created and channelled desires towards consumerism, predicated on resource-extractive practices, within the context of what Gilles Deleuze calls societies of control. This control has also intensified in the digital era, particularly through Internet-based technologies which provide increasingly efficient platforms for the escalation of commodification – ironically, despite the reality of ecological crisis being precipitated by the related extractive practices to the point where it now threatens the continued existence of life on earth. , Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 2021
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- Date Issued: 2021-04
Effect of coal and microalgae biomass co-firing on CO2, SO2 and NOx emissions: An experimental evaluation
- Authors: Magida, Nokuthula Ethel
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53817 , vital:45984
- Description: There is increasingly stringent legislation on the environmental impact of energy production from coal combustion, and this has led to growing pressure to reduce the emission of greenhouse gases (GHGs). Thus, there is a significant need to develop and implement clean coal combustion technologies that would reduce the environmental gas pollutants. For power generation, the co-firing of biomass fuels at conventional coal-fired power stations is recognised as one of the low-cost, low-risk options to achieve significant reductions in GHG emissions. When coal is co-utilized with biomass there is added attractiveness because the biomass is CO2 neutral, and there is interest in using waste biomass and microalgae. Thus, the co-combustion of coal and biomass for energy production results in pollutant reduction, especially in the emissions of NOx, SOx, volatile organic compounds and polyaromatic hydrocarbons. The synergistic activity observed for toxic organic emissions is not well understood and is thought to involve chemical interaction between the volatiles from each fuel coupled with possible catalytic activity from the inorganic constituents of the fuels. The characterization of co-firing products and gases emitted from coal and microalgae (particularly the Scenedesmus strain) co-combustion has received limited attention. Therefore, this study seeks to understand possible interactions occurring during co-combustion of coal and Scenedesmus microalgae (Coalgae®). Additionally, the study aims to determine the effect of co-firing coal and Scenedesmus microalgae on CO2, SO2 and NOx emissions. The term “Coalgae®” refers to the mixture of coal and microalgae biomass. The study looks at physico-thermal characteristics as well as CO2, SO2 and NOx emissions of various coal-microalgae blending ratios by mass; 100:0 (coal), 95:5 (Coalgae® 5%), 90:10 (Coalgae® 10%), 85:15 (Coalgae® 15%) and 80:20 (Coalgae® 20%). Characterization techniques carried out included proximate and ultimate analyses, Fourier-transform infrared (FT-IR) and Scanning electron microscopy and X-ray energy dispersive spectroscopy (SEM/EDS). For combustion studies two techniques were applied. Low heating rate was obtained through a Thermogravimetric-Mass spectrometer analysis (TG-MS). Other combustion experiments were performed on the five lumpy fuels (coal and Coalgae® 5% - 20%) exposed to the flame in a fixed-bed combustion reactor. The emission concentrations of CO2 (%), NOx (ppm) and SO2 (ppm) of coal and Coalgae® blends were measured during the combustion of the five materials using a Lancom 4 portable flue gas analyser. The mass reduction (g) and temperature (°C) at the reactor exit were recorded during the combustion tests to compare the combustion behaviour of the four mixtures to that of raw coal. TG-DTG curves of coal and microalgae confirmed that the combustion behaviour of these materials was different. Coal showed one reaction during the combustion process, while microalgae and the Coalgae® blends showed three reactions. A significant reduction in activation energies of 160.4 kJ/mol, 159.6 kJ/mol, 151.3 kJ/mol, and 134.2 kJ/mol for Coalgae® 5% - Coalgae® 20%, respectively, compared to coal (161.3 kJ/mol) was achieved. The lowering of activation energy could be attributed to the relative fixed carbon content. SEM morphology images of ash obtained from the combustion of coal and Coalgae® 5% - 20% confirmed changes in devolatilization and combustion behaviour of solid raw fuel. The ash of Coalgae® blends had higher fluxing elements (Fe, Ca, K and Mg) than coal and this shows possibility of slagging and fouling in combustion systems. The Coalgae® blends showed a synergistic effect due to different combustion characteristics of coal and Scenedesmus microalgae. The combustion results obtained from the fixed-bed reactor showed significant reductions in concentrations of CO2, SO2 and NOx emissions for Coalgae® blends compared to baseline coal. Microalgae reduced CO2 emissions from baseline coal by 14.9%, 19.5%, 23.5% and 31.4% for Coalgae® 5%, 10%, 15% and 20%, respectively. SO2 reductions of 1.9%, 10.6%, 15.8% and 18.2%, and NOx reductions of 22.4%, 26.1%, 24.4% and 16.9% were achieved with Coalgae® 5%, 10%, 15% and 20%, respectively. Moreover, the combustion efficiency of Coalgae® blends increased significantly by up to 14.5% from baseline coal (86.4%) to Coalgae® 20% (98.9%). Based on the above findings, the co-firing of coal and Scenedesmus microalgae biomass was necessary for the reduction of CO2, SO2, and NOx emissions. As such, Coalgae® blends can be considered as alternative fuels in any coal driven process for energy generation. , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
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- Date Issued: 2021-12
Effect of fire severity on Afrotemperate forest tree survival
- Authors: Giddey, Brandon Louis
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55385 , vital:51988
- Description: Weather patterns have changed globally with increased fire danger weather conditions, along with poor management and fire suppression, likely contributing to the increase in prevalence of large wildfires. Ecosystems such as temperate broadleaved forests, where fire is limited by climatic conditions, are particularly at risk of altered fire regimes related to climate change. It is thus important to monitor the effects of fire in these ecosystems. Satellite remote sensing is a cost-effective way to assess spatial variability of fire effects on a landscape scale and has become an increasingly used tool for studying fire severity. In the southern Cape of South Africa during October-November 2018, a large wildfire burnt patches of Southern Cape Afrotemperate Forest (hereafter ‘Afrotemperate forest’). This provided an opportunity to investigate the accuracy of a satellite index for fire severity and the effect of fire on Afrotemperate forest survival. The first objective was to verify through field observations the accuracy of the differenced Normalised Burn Ratio (dNBR) as an index of fire severity derived from Sentinel 2 images in Afrotemperate forest. The second objective was to investigate the effect of fire severity and tree size on the post-fire survival of Afrotemperate forest tree species. For the first objective, stem fire severity, estimated from observed damage to the main stem, was recorded for 1 648 trees in 87 plots and linear regression used to test whether the observed measure of fire severity was related to dNBR. For the second objective, stem fire severity and tree survival 19-24 months post-fire were recorded for 40 species and 1 378 trees in 88 plots. Trees were considered to have survived if they resprouted from the main stem or had green foliage in the canopy. The survival response was assessed in relation to stem fire severity and tree size for all trees collectively and for 10 species (with sample size > 40) individually, using logistic regression. A strong linear relationship between dNBR and stem fire severity (r2 = 0.69, p < 0.001) confirmed the accuracy of dNBR as a measure of fire severity in Afrotemperate forest. In the fire investigated, 4 628 ha of Afrotemperate forest burnt of which 67% burnt at low severity, 21% at medium severity and 12% at high severity. The dNBR values associated with fire severity categories were comparable between Afrotemperate and North American forests, suggesting that dNBR values are relatively standard across forest types. Information on the distribution of fire severity facilitates investigation of further questions regarding past and future fire regimes and the fire ecology of Afrotemperate forest. The post-fire survival rate of Afrotemperate forest trees was 45% which is comparable to that in coniferous forests of North America but lower than that in temperate forests of Australia and Portugal and the neighbouring dune thicket which shares several species with Afrotemperate forest. Fire severity had a significant negative effect on survival and tree size a significant positive effect. Total variance explained by the model (for species collectively) was 40.8%, of which fire severity and tree size combined explained 13.2%, and species as random factor, 27.6%. Respective tree species showed differential survival responses – four species showed high survival (> 60% of individuals), while five species showed low survival (< 40%). This study was the first post-fire assessment of the resprouting ability of Afrotemperate forest trees and a third of the trees surveyed (for species collectively) resprouted from the stem. This suggested that resprouting from the stem is a primary means of post-fire recovery in Afrotemperate forest trees, in contrast with previous assertions that several common canopy species, including Podocarpus latifolius, Afrocarpus falcatus, Scutia myrtina, Scolopia mundii and Rapanea melanophloeos, are unable to resprout. Varying resilience to fire among species supports previous suggestions that fire affects species’ composition and diversity in these forests and calls for careful management of fire regimes in the face of global change. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2022
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- Date Issued: 2022-04
Employee Value Proposition (EVP) and employee engagement in a leading South African car rental company
- Authors: Mtati, Yanela
- Date: 2014-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53330 , vital:45134
- Description: The car rental industry in South Africa is a highly competitive sector. The industry’s players are constantly faced with the challenge of finding ways in which to enhance their competitiveness. One of the most important challenges for organisations operating in this industry is to deliver the best service to their customers, hence ensuring they retain customer loyalty, growth and securing future profitability. While a number of competitors may rely on various competitive strategies such as lower prices, it could become increasingly challenging for others to adopt similar approaches without comprising profitability. To overcome this challenge, together with Barloworld, Avis has implemented various employment engagement strategies with the aim of attracting, empowering, and retaining an engaged workforce. Research has shown that employees provide organisations with sustainable competitive advantage. More specifically, it has shown that engaged employees outperform disengaged employees. The differentiating factor for organisations in the pursuit of competitive advantage would therefore be an engaged workforce. In order to remain competitive, Avis realised that their employees area source of competitive advantage. In the year 2013, Avis packaged and introduced EVP as a human resources strategy towards winning an engaged workforce. Some of the objectives for taking on this strategy were to increase job satisfaction and motivation amongst employees and thus result in higher job performance. The main purpose of this study was to measure the impact that the introduction of EVP had on employee engagement at Avis. Introducing a structured EVP plan within this organisation was aimed to increase employee engagement and thus, this study aimed to measure the impact of this intervention. A literature review was conducted to expand on the various definitions of EVP, employee engagement and the elements that influence and impact these variables. This research revealed that engaged employees make positive contributions to key business outcomes such as financial performance, productivity and customer satisfaction. An empirical study was conducted by means of a survey with a questionnaire as data collecting tool. The purpose of the structured questionnaire was to validate the findings obtained from the theoretical overview and to assess employees’ perceptions of the EVP elements, engagement factors and the impact of engagement on the organisational success. The population comprised of 142employeesand 65% a response rate was obtained. The key findings of the study indicated that in general employees are engaged and committed to the vision of the organisation. It also indicated that the introduction of EVP improved the manner in which employees’ viewed their leaders and created a leadership culture that was conducive to the success of the organisation. Furthermore, the study validated the existence of a strong positive relationship between EVP, employee motivation, leadership culture, employee retention, compensation and employee engagement. This study provided direction and feedback in the organisation’s attempt to improve engagement levels and ultimately in the pursuit of competitive advantage. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMMU Business School, 2014.
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- Date Issued: 2014-12
Enablers and dis-enablers to the success of the East London industrial development zone
- Authors: Ramncwana, Ayanda
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52967 , vital:44890
- Description: Special Economic Zones (SEZs) have been a global phenomenon since the 1960s and have been integral to the transformation of emerging and ailing economies. In 2002 the South African government identified SEZs as instruments for advancing its economy into a higher industrialisation path based the assessment of potential socio-economic gains. Past research findings, however, suggest that South African SEZs, when compared to international SEZ performances, are lagging behind both in terms of delivering a compelling SEZ value proposition and achieving the desired socio-economic gains. Limited research has been conducted on the factors which enable and dis-enable the success of SEZs in South Africa. This study evaluates the factors that enable and dis-enable the effectiveness of South African SEZs in achieving their socio-economic development objectives. Applying a qualitative case study methodology, research was conducted on the East London Industrial Development Zone(ELIDZ), one of the first SEZs to be designated in South Africa in 2002. The study finds that a weak SEZ regulatory framework characterised by slow delivery of important SEZ industrial support has dis-enabled South African SEZs. A complex business environment has also dis-enabled the competitiveness of South African SEZs. The study reveals that while it is easier to conduct business inside the SEZs, South African SEZs are not given adequate policy latitude to be an experimental ground to drive reform that will improve the ease of doing business in South Africa. A challenging labour market marred by low productivity, high production costs and inadequately skilled labour continue to challenge the success of SEZs in South Africa. Poor regional infrastructure and delays in the roll out of fiscal incentives, are also some of the factors that have dis-enabled the success of the East London IDZ. World-class infrastructure inside the ELIDZ, inherent locational competitive advantages and the existence of locational-specific non-fiscal incentives have, however, been the key enablers that have improved the competitiveness of the ELIDZ. Despite some of the notable dis-enablers to the competitiveness of South African SEZs, the ELIDZ has done well in achieving short-term static outcomes such as employment, exports, investment attraction and FDI despite some of the factors that had dis-enabled the zone. The zone has also achieved certain dynamic outcomes such as skills upgrading, industrial upgrading, technology transfer and diversification of the economic output, albeit these still being at low levels. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
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- Date Issued: 2021-04
Encapsulation of flame retardants for lithium-ion battery safety
- Authors: Ntombela, Nompilo Princess
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55412 , vital:51993
- Description: Lithium-ion technology takes the lead in electric mobility systems, resulting in an increase in the global demand for Li-ion batteries; however, these batteries are associated with numerous safety concerns. Additionally, there are high costs, high energy and power issues which are some of its key limitations. Research efforts are focused on overcoming these obstacles, with different approaches being explored, such as the investigation of more stable salts, modification of active materials and organic solvents, and the use of electrolyte additives. This study focused specifically on electrolyte additives since the electrolyte is one of the most unstable components of the battery. The electrolyte’s decomposition is one of the reactions that occur inside a battery, which may occur due to overcharging or due to an internal short circuit, amongst others. The electrolyte’s decomposition occurs at the early stages of the thermal runaway process and forms part of the reactions that lead to fires and explosions. Thus, this research aims to develop suitable electrolyte additives to improve the safety aspects of Li-ion batteries. Flame retardant additives show great promise in reducing the flammability of the electrolyte in Li-ion batteries, since they serve to suppress the chemical reactions associated with battery ignition. They retard the fires by scavenging the active radical species formed during the decomposition reaction. In this study, the use of flame retardants was investigated. Flame retardant additives have shown to have flame impeding properties inside a battery; however, their direct addition to the electrolyte tends to cause adverse effects on the ionic conductivity and electrochemical performance of the cells. This study investigated an alternative option - the option to microencapsulate such additives into a neutral compound to ensure that the flame retardant has minimal/no effect on the performance of the battery. This investigation looked at tris(2-butoxyethyl) phosphate (TBP) and bis(2,2,2-trifluoroethyl) methylphosphonate (BFP) as flame retardant additives for the electrolyte. The TBP and BFP flame retardants were microencapsulated in poly(urea formaldehyde) (PUF) coating material via in situ polymerization method. The capsules were characterized using various analytical techniques - to prove it was successfully encapsulated. Electrochemical studies were further done on the capsules and neat flame retardants inside a coin cell. Self-extinguishing time (SET), which is the flammability test, proved that the additives have flame retarding abilities. Opto-digital microscopy (DSX) and scanning electron microscopy (SEM) did confirm the spherical shape of the microcapsules, where SEM also showed the smooth outer layer of the microcapsules and its hollow inner side. Fourier transform infrared spectroscopy (FTIR) proved the presence of the TBP and BFP inside the PUF resin by showing that the chemical composition of microcapsules consisted of both the PUF and flame retardant additives. Simultaneous DSC-TGA (DST) was also performed which showed that the microcapsules were stable before 200 °C, which indicates it would not decompose before the thermal runaway events are occurring. TGA analysis did show that the microcapsules underwent multiple decomposition steps upon heating. Additionally, 31P nuclear magnetic resonance (NMR) was used to quantify the amount of flame retardants additives encapsulated inside PUF shell, and also confirmed the stability of the microcapsules for one month in the electrolyte and at temperatures up to 200 °C. The ionic conductivity was vastly decreased when the flame retardants were added directly to the electrolyte. However, adding the flame retardants in a form of capsules had minimal effect on the ionic conductivity. The cycle capacities of the capsules were also improved when the capsules were added to the cell compared to that of neat flame retardants. The same effect was also noticed when doing Electrochemical Impedance Spectroscopy (EIS). This shows that microencapsulation improves the resistance of the cell caused by the flame retardant in comparison to when added directly to the electrolyte of the cell. , Thesis (MSC) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2022
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- Date Issued: 2022-04
Engineering nanocatalysts using mixed metals for hydrodesulfurization of fuel oil
- Authors: Majodina, Siphumelele
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53861 , vital:46021
- Description: Crude oil is a complex blend containing thousands of hydrocarbons, non-hydrocarbon compounds and heavy metals. These hydrocarbons are mixed with variable quantities of sulfur-, nitrogen-, and oxygen-containing compounds. The combustion of fuel containing organosulfur compounds results in the emission of sulfur oxides (SOx) into the atmosphere. These toxic gases escape into the atmosphere resulting in air pollution, which is a large contributor to global warming. Air pollution also causes pulmonary diseases, allergies and may even lead to human death. It can also cause harm to other living organisms such as animals and food crops. Thus, mandating the reduction of sulfur in organosulfur compounds in fuel to <10 ppmS by the environmental protection agency. Several studies have been conducted to remove sulfur from fuels, most of which have focused on removing refractory sulfur compounds due to the difficulty in removing sulfur in these compounds. However, the currently employed hydrodesulfurization (HDS) catalysts suffer in producing fuels complying with the future standards of fuels quality. Generally, HDS catalysts are made up of metallic components, Co (Ni) and Mo (W), on porous supports, the catalytic activity of these catalysts strongly depends on the amount of NiWS (CoMoS) phases in it and to the extent in which these phases are exposed on the catalyst support surfaces and this is engineered using chelating agents and size of catalysts. To this end, nanosized materials (nanocatalysts) are considered most suitable, as reported active phases of HDS catalysts are exposed, hence improving the hydrodesulfurization of sulfur-containing compounds in fuels. Nanocatalysts results in nanoparticles and when impregnated on a support will results in high surface area, and enhances electronic property, which increases the activity of the catalyst allowing the most refractory sulfur to be removed. The addition of chelating agents such as EDTA, acetic acid, and citric acid further improves the activity of the catalysts by producing more active phases on the catalyst. In this research project, nanocatalysts will be synthesised using mixed metals with and without chelating agents and tested for HDS activity and selectivity towards sulfur using refractory organosulfur compounds in fuels under industrial HDS conditions. This work was divided into two sections, and this dissertation summarizes the research outcomes of each phase. The first section examines the effect of chelating ligands, namely, ethylenediaminetetraacetic acid (EDTA), citric acid (CA), and acetic acid (AA), on CoMo HDS activity and the sulfidation mechanism. In this study, chelating ligands seem to have a beneficial effect on HDS activity. Detailed mechanistic aspects of interactions between chelating ligands and metallic species (Co-chelating ligands) were also studied. Characterization by SC-XRD revealed that the presence of the chelating ligand result in the formation of complex with cobalt, and the effect of this complex was shown by TG-DSC analysis. This showed that the presence of chelating ligand leads a to delay of cobalt sulfidation as the complex decomposes at higher temperatures, which was the main cause of improving HDS activity. It was also shown that chelating ligands play a role in dispersion of metal oxides and sulfided metal oxides (TEM and XPS). XPS results showed low MoS2 phase for CoMo/Al2O3 (45%), while CoMo-EDTA/Al2O3 (63%) catalyst resulted in high MoS2 phases. From all the catalysts, CoMo-CA/Al2O3 (98%) gave the highest catalytic activity, and the increase in activity could be attributed to the formation of octahedral molybdenum oxides as they are easily reducible during sulfidation and result in more dispersed active phases and weak metal-support interaction. The second section examines the effect of a promoter (Rh) and different chelating ligands (EDTA, AA, and CA) on the catalyst RhMo supported with alumina. In this phase, rhodium was used as promoter, the following trend for catalytic activity was observed: RhMo/Al2O3 (88%) > RhMo-AA/Al2O3 (73%) > RhMo-CA/Al2O3 (72%) > RhMo-EDTA/Al2O3 (68%). This could be that the addition of chelating ligand complexed both metallic species retarding sulfidation of both metals, hence lowering the HDS activity. Studies show that it is possible for the citric acid to complex with both promoter and an active metal (Mo), and this might result in the formation of molybdenum dimers, trimers and tetramers which are difficult to sulfide. XPS analysis showed that unchelated catalyst have more MoS2 phases of 63%, hence higher dispersion than the chelated catalyst, this could be the reason for high activity in RhMo/Al2O3 (88%) catalyst. , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
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- Date Issued: 2021-12
Enhancing the provision of social housing through public-private partnerships in Buffalo City Metropolitan Municipality
- Authors: Sobuza, Duduzile
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54806 , vital:47905
- Description: The purpose of this study was to establish the extent to which the provision of social housing can be enhanced through public-private partnerships (PPPs) in the Buffalo City Municipality. A total quality management approach was used as a foundation to understand the application of PPPs in social housing delivery in the Buffalo City Municipality. The study was desktop research to understand the role of PPPs in the provision of social housing. The findings of the study revealed that PPPs provide additional capital for social housing development. The study highlighted that PPPs play a crucial role in providing alternative management and implementation skills as well as offering greater efficiency in the utilisation of financial resources in the delivery of social housing. The findings of the study further revealed that PPPs accelerate social housing delivery through the provision of additional sources of finance where the government is unable to increase public debt to meet investment needs. The study also identified a plethora of constraints that can hinder the adoption of PPP initiatives in social housing delivery. These include capacity constraints, financial constraints, lack of access to land and an unfavourable policy environment. Subsequently, the study advanced a set of recommendations in this regard that includes the creation of transparent and competitive procurement processes, government support in terms of financial incentives, review of the regulatory framework to improve access to land and the regulation of financial services institutions for access to affordable housing credit. , Thesis (MA) -- Faculty of Humanities, Department of Public Management and Leadership , 2021
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- Date Issued: 2021-04
Entrepreneurial intentions of Eskom employees in the Eastern Cape
- Authors: Ngamlana, Vuyiseka Pakama
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53026 , vital:44871
- Description: Entrepreneurship has been gathering increasing attention because of its critical impact on the economy. This is due to Entrepreneurship serving both as an engine driving economic growth and as a strategy, which promotes the discovery, dissemination and implementation of innovation. In South Africa, limited research has been conducted to test the entrepreneurial intentions of employees working in the State Owned Enterprises (SOEs). SOEs such as Eskom are facing significant political, institutional and normative pressures which minimise its ability to perform its mandate. Eskom has a surplus work force with a headcount of 47 600 employees, this is 15 000 more than the headcount it had a decade ago, while the electricity production has not changed. The aim of this study is to examine entrepreneurial intentions of Eskom employees and the factors that influence individuals to select employment in the public sector. The entrepreneurial intention model used in this study draws from the work by Mhlanga (2019). The model consists of culture, family obligations, job security, role modelling, entrepreneurial self – efficacy, access to financial resources and locus of control to entrepreneurial intentions. Convenience sampling was used in this study (n=160). The research design involved a cross-sectional approach. SPSS and STATA statistical software were used for the analyses. Job security, role modelling and selfefficacy were found to influence entrepreneurial intentions of Eskom employees in the Eastern Cape. Eskom employees in the Eastern Cape were found to be optimistic about the availability of financing and accessibility for start-ups business ventures. One of the recommendations therefore is for Eskom management to facilitate initiatives such as Entrepreneurship Workshops for Eskom employees to network and share ideas, with funders and mentors. The target population consist of 2050 employees sample size of 160 respondents was obtained. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NNU Business School, 2021
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- Date Issued: 2021-04
Entrepreneurship development in South Africa
- Authors: Sibara, Siphokazi Nontando
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52986 , vital:44894
- Description: The current unemployment rate in South Africa is sitting at 30%. The South African government has identified various ways of combating this high rate. Entrepreneurship has been identified as one of the tools that can be utilised by the country to assist bring down these high levels. However, it seems that even though this is the case, there has been a decline in the sustainability of entrepreneurship. As per the GEM 2018 report on entrepreneurial activity in South Africa in the age group 25 – 34 years, there has been a downward trend as it has increased back from the low 2016 levels of 6.3% to 14.5% in 2017. The study aims to explore variables that can assist to develop entrepreneurship in South Africa, thereby assisting with its sustainability. Once entrepreneurship is sustainable it can assist with creating job opportunities thereby decreasing the high levels of unemployment in the country. The study starts by asking several research questions that introduce the various variables were identified that have an impact on the development of entrepreneurship. The variables that have been identified are the following: education, national and business culture, support, business skills and competencies. The study uses these variables to investigate the path leading to entrepreneurship development in the country. A qualitative research methodology has been used to carry out the research. Participants from the Eastern Cape, East London area are identified as a sample with which to conduct interviews and collect data. , Thesis (MA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
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- Date Issued: 2021-04
Estimating activity patterns in camera trap studies, and the overlap between domestic and indigenous ungulates
- Authors: Peral, Christopher Michael
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ungulates -- Behavior -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52019 , vital:43437
- Description: Animal activity can reveal responses to social and ecological factors such as the presence of food, water, shelter, predators, competitors or conspecifics. Thus, an understanding of an animal’s activity patterns provides insights into how and why they are using landscapes in the manner in which they do. Camera trap surveys, typically used to record the occurrence of species of interest, are also an efficient way to collect data regarding animal activity patterns but require robust analytical methods. The analysis of camera trap data requires assumptions that may differ for camera trap surveys that estimate occurrence or activity. One such assumption is temporal independence. This refers to the removal of images within a specified time interval, as these images are assumed to be images of the same individual. This assumption stems from the use of-time-to-independence in occurrence or density-based studies, where it reduces overestimation of animal counts. In studies of animal activity, this assumption is generally used, even though animal behaviour or activity occurs continuously over time and as such should be measured over time. I analysed 112 467 images of eight cooccurring species, to test the effect across various times to independence, these being set at 1, 5, 10, 15, 30 and 60 minutes. Time-to-independence resulted in significant loss of data and biased the interpretation of the activity patterns of species and interactions amongst species, particularly for herbivorous social species. In light of these findings, activity pattern estimates based on camera trap studies should be cautious when using time-to-independence. I then explore ‘habitat use’ in space and time by domestic and indigenous ungulates using a camera trap survey. Domestic ungulates (livestock) have become common place on rangelands and may compete with native species. It was hypothesised that there will be overlap in habitat use by livestock and indigenous ungulates. My results show that indigenous ungulate species, particularly larger species such as kudu (Tragelaphus strepsiceros) and springbok (Antidorcas marsupialis), changed their spatial and temporal use as a result of the presence of domestic ungulates. Other smaller indigenous ungulates, such as steenbok (Raphicerus campestris) and duiker (Sylvicapra grimmia), were less affected by the presence of livestock. Kudu were found to use more open habitats at different times whilst springbok used more dense habitats at different times in the presence of livestock. This supports the hypothesis of competition between livestock and indigenous ungulates. This study provides novel insight into the analysis and interpretation of activity patterns based on camera trap surveys. Additionally, this study demonstrates the competitive displacement between domestic and indigenous ungulate species. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
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- Date Issued: 2021-04
Estimating Bayesian tolerance intervals for a two - factor factorial model
- Authors: Besele, Kagiso Francis
- Date: 2021-04
- Subjects: Gqenerha (South Africa) , Eastern Cape (South Africa) , Mathematical statistics
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52302 , vital:43587
- Description: Quality improvement efforts have become the cornerstone of all manufacturing processes. Quality can be defined in terms of variability reduction, and since variability is a statistical concept, statistical techniques such as statistical quality control present techniques for assessing process variation. Methods such as experimental design provide a way to ascertain factor relationships and give a basis for computing variability that arises from each process variable, ultimately providing a way of calculating total process variability. This in turn results in variance components and eventually variance component estimation. As with any statistical model, estimates may be classified in any one of two ways, point estimates or interval estimates. Interval estimates that provide information about an entire population, and not only information on a few observations from a sample or knowledge about only a population parameter, are known as tolerance intervals. Wolfinger (1998) provided a Bayesian simulationbased approach for ascertaining three types of tolerance intervals using a balanced one-way random effects model. In this study, the method initially proposed by Wolfinger (1998), is extended in order to estimate tolerance intervals for the balanced two-way crossed classification random effects model with interaction. The suggested and derived techniques will be applied to the thermal impedance data initially collected by Houf and Berman (1988), and the method presented by Wolfinger (1998) will be expanded to also include the estimation of tolerance intervals for averages of observations from new or unknown measurements. This Bayesian approach provides a thorough but yet simplistic paradigm to using tolerance intervals in manufacturing settings. , Thesis (MSc) -- Faculty of Science, Statistics, 2021
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- Date Issued: 2021-04
Estimating the population size of three large carnivore species and the diet of six large carnivore species, in Madikwe Game Reserve
- Authors: Honiball, Terry-Lee
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Carnivores
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52139 , vital:43421
- Description: Large carnivores play a vital role in ecosystems, providing ecosystem services such as herbivore regulation. If not properly monitored, carnivores could place significant pressure on certain prey species, and in extreme cases, result in the local extinction of certain species. A lack of demographic data can indirectly threaten carnivores, as policies and management decisions based on demographic data can result in the over harvesting or unsustainable hunting of large carnivores. Furthermore, their conservation is becoming confined to small, fenced, protected areas. Whereby species are intensively managed, making demographic and ecological data a fundamental part of conservation decisions. Therefore, it is essential for conservation practitioners to understand large carnivore demography and their role, to conserve them effectively. To provide Madikwe Game Reserve with the necessary data for effective long-term monitoring and management of the large carnivore guild, I estimated the population size of the cryptic carnivores. I then investigated the efficacy of different camera trap survey designs on improving the detection probability of leopard (Panthera pardus), brown hyaena (Parahyaena brunnea), and spotted hyaena (Crocuta crocuta). I found that brown hyaena and spotted hyaena detection probability increased with a higher number of camera traps, whereas leopard detection probability did not increase with an increased number of camera traps. I further investigated the diet, prey preferences and dietary overlap of lion (Panthera leo), cheetah (Acinonyx jubatus), African wild dog (Lycaon pictus), leopard, spotted hyaena and brown hyaena. I found that all species displayed a degree of dietary overlap, however the most notable level of competition occurred between leopards, wild dogs, and cheetahs. This iv information will assist MGR to make informed decisions about large carnivore management in the reserve. I recommend continued long-term monitoring for the establishment of trends over time, allowing for holistic management of the entire large carnivore guild. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
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- Date Issued: 2021-04
Evaluating compliance with supply chain management policies in the public sector
- Authors: Mvanana, Siziwe
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55064 , vital:49027
- Description: Despite reform processes in the employment of Supply Chain Management (SCM) as a strategic tool in the South African public sector, there are predicaments in SCM policies, especially in the public sector. This notwithstanding, research that demystifies the compliance with SCM policies in the public sector. This study evaluate compliance with Supply Chain Management policies in the public sector. The findings of the study revealed that overall the public sector have adopted and implemented the SCM policies. However, SCM policies are sometimes not always aligned with government policies. The most implemented SCM police was demand management, followed by acquisition management. The least implemented policies were logistics, disposal, risk and performance management. No significant differences were observed among the public sector. The public sector face serious SCM challenges in implementing their SCM policies. These challenges stem from: a lack of training for SCM staff, lack of proper capacity, poor planning, and ineffective black economic empowerment in the public sector. Based on the results, there is a need of training for SCM staff, capacity building, better planning interventions, and more effective black economic empowerment. It should be reiterated that the lack of proper SCM policies and procedures are the root cause of problems in service delivery in South Africa. The study concludes by recommending that SCM practitioners should regularly update their SCM policies, ensure proper compliance with the elements of SCM, as well as to source competencies, skills, and knowledge from higher education institutions and private accredited service providers. , Thesis (MPA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
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- Date Issued: 2020-04
Evaluating the influence of electoral violence on democratic consolidaton in Sub-Saharan Africa: the case of the democratic republic of congo from 2006-2018
- Authors: Poggi, Giovanni
- Date: 2020-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55073 , vital:49035
- Description: The democratic legitimacy of African executives has been called into question substantially over the last decade. Using the Democratic Republic of Congo (DRC) as a case study, this evaluative research seeks to analyse how African executives and political elites continue to play a crucial role in inducing civil unrest and electoral violence. For African democracy to develop, there must be enforced resolutions to eradicate issues facing both procedural and substantive democracy on the continent. This research examined electoral violence and unconstitutional acts that aggravate electoral system abuse and diminish the consolidation of democracy in sub-Saharan African states, in particular the DRC. A specific focus on the leadership of Joseph Kabila in the DRC forms the case study component of this research. In 2016, elections were postponed in the DRC and the DRC’s constitutional court interpreted Article 70 and Article 73 of the constitution in a manner that allowed President Kabila to remain in office until a newly elected president was installed. The court’s ruling and interpretation of Article 70 and Article 73 was an attempt to avoid a power vacuum. The study evaluated the components that trigger the escalation of electoral violence in Sub-Saharan African states. The study reports on different contributory factors, including but not limited to, the impact of predatory and rent-seeking leadership towards electoral manipulation; and the effect of patron-client relations on democratic institutions. Even though elections are not the only indicator of democracy stability in a state, this study demonstrated how electoral violence threatens the consolidation of democracy in sub-Saharan African states, in particular the DRC. In examining electoral violence, a desktop analysis method, which was used in the study, involved the collection of data from existing resources in order to provide a more critical lens to understanding electoral violence in the DRC. The theoretical analysis used in the study is the Höglund (2009) framework on electoral institutions which outlined how political violence remains a pervasive feature in Sub-Saharan countries by linking the framework to patron-clientelism. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
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- Date Issued: 2020-12
Evaluation of local economic development in Jinja City-Uganda
- Authors: Wambi, Brian Dan
- Date: 2021-04
- Subjects: Uganda , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53041 , vital:44905
- Description: The purpose of this study was to evaluate the implementation of Local Economic Development in Jinja city of Uganda. The research examined the process of service delivery, strategies of implementing Local Economic Development as well as the impact of the initiated development projects to the people. The results showed that the implementation of Local Economic Development in Jinja city can positively change the citizen’s social and economic status hence an improvement in their livelihood and standards of living. Also, implementation of Local Economic Development can grow domestic businesses and enhance local trade, as well as improve service delivery to the people. The study holds practical implications that Local Economic Development can reduce poverty rates in Jinja city through advancement of industrialisation, elevation of tourism, development of the mining sector, and promotion of fishing and agriculture activities to create jobs for the people. The results of this research hold significant theoretical implications that predictions and explanations based on the studied models in this report can be well replicated in the Ugandan context provided that suitable local content is used instead of imported content. Methodologically a systematic literature review of available published, reviewed articles was carried out, a random sample was used to select the studied articles in this research. , Thesis (MA) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2021
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- Date Issued: 2021-04
Evaluation of the extent of the public programming by Eastern Cape Provincial Archives and Records Services
- Authors: Tshebi, Siyathemba Mboneleli https://orcid.org/0000-0003-2833-9842
- Date: 2022
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27663 , vital:69381
- Description: Public programming initiatives are an integral part of archival operations worldwide as they support the greater use of archival records by attracting prospective users and sponsors. Public programming comprises a sequence of strategies for publicizing and marketing archives to the public, which are crucial in archival operations as they promote better use of archives and records. South African National Archives and Records. Services depends on provisions of the National Archives of South Africa Act of 1996 in its strive to promote access and use of archives as sources of information. . unknown and therefore not used to their maximal utility value, likely due to low-key and ineffective archival public programming initiatives. Consequently, the primary purpose of this research study was to evaluate the extent of public programming strategies used by the Eastern Cape Provincial Archives and Records Services (EAPARS). The study used a mixed-method, embracing qualitative and quantitative research approaches. As an integrated record-keeping framework, Record Continuum was used as a theoretical framework to guide the study. Sixteen copies of questionnaire were distributed among staff and users ECPARS. The research uncovered that ECPARS does not have specific regulations and policies on public programming, but relies on the more general provisions of the Provincial Archives and Records Services Act of 1996 as a guiding instrument in executing its public programming operations. The study further revealed various factors, such as the limited budget and inadequate staff, as key hindering factors in the smooth execution of archival public programming plans by ECPARS. The study recommends a review and update by ECPARS of how it can specifically effectively implement the provisions of the 1996 Act to the modern ways of taking public archives to the people. The research also recommends that ECPARS engage additional staff or outsourced services to strengthen its the public programming of its archival resources and services workforce for Eastern Cape Provincial Archives and Records. The study concludes that improved financial resources, use of ICTs, and coherent policy framework, and public awareness creation and education can facilitate better to acquire, widen access to use of its archives. Keyword , Thesis (MLIS) -- Faculty of Social Sciences and Humanities, 2022
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- Date Issued: 2022
Evolutionary robotics controllers with location perception facilitated by neural network-based simulators
- Authors: Phillips, Antin Paul
- Date: 2021-04
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , Neural networks (Computer science) -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52137 , vital:43444
- Description: Humans impressively maintain a real-time approximation of their bodily form. For instance, one knows where one’s arm is, relative to the body, without needing to directly observe it. This ability, in part, allows humans to interact with the environment without direct observation. This bodily sense is referred to as ”proprioception“. The human body contains various proprioceptors, sensory neurons which provide information about the physical state of the body. This information, along with internal body representations that humans develop over time, allows one to maintain an approximation of their bodily form. Humans also possess an impressive sense of direction and navigation ability. For instance, a blindfolded human can move around a familiar environment and maintain an approximate sense of where they are within that environment. This ability is, in part, enabled by proprioception as it provides one with an approximation of the effects their actions have on their body. The field of Evolutionary Robots (ER) makes extensive use of robotic simulators to carry out simulated robotic evaluations. Research has been conducted into alternate forms of simulation and Simulator Neural Networks (SNNs) were subsequently developed. The speed and accuracy of these SNNs, relative to more typical simulation techniques, is what inspired the approach explored in this research. Robots do not necessarily possess the appropriate hardware to sense their position within an environment. Thus, it was proposed that SNNs could be incorporated into ER controllers to approximate the position of the robot. These SNNs would be executed in parallel to the robot and provide a constant approximation of the robot’s position. This would provide controllers with information that they would not otherwise have, albeit approximate information. Various experiments were carried out which examined both typical ER controllers as well as those which were augmented in the proposed fashion. The augmented controllers were found to outperform typical controllers as well as develop more advanced and efficient behaviours. Furthermore, the augmented controllers demonstrated the ability to solve tasks that regular controllers could not. A potential criticism of the approach suggested in this research is that ER controllers could hypothetically be trained in such a way that the proposed augmentation would be unnecessary. This possibility was investigated and it was found that successfully training controllers in such a manner would be unlikely. Furthermore, the effort involved in fine-tuning this training process would be greater than simply following the approach suggested in this research. Another potential drawback of the suggested approach involved the accuracy of the information that SNNs could provide to controllers. The approximated information was found to diverge over time and negatively affected controller performance. A method to address this issue was proposed and subsequently implemented. This method was demonstrated to be an effective means of reducing the divergence of the SNNs outputs and, in turn, improved controller performance. , Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
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- Date Issued: 2021-04
Examining the implementation of the Department of Social Development’s fatherhood strategy by FAMSA
- Authors: Sishuba, Thozama Alicia
- Date: 2023
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27618 , vital:69320
- Description: This study aimed to exam the implementation of the Department of Social Development’s Fatherhood Strategy by Families South Africa (FAMSA) Eastern Cape. FAMSA is a non-profit organization providing vital services to people in families while providing them with psychosocial and emotional support. FAMSA has been in existence since 1954. To achieve this aim, the study’s objectives were underpinned by understanding the implementation of the Department of Social Development’s Fatherhood Strategy in Buffalo City Metro, establishing FAMSA’s response to the implementation of the Department of Social Development’s Fatherhood Strategy as well as exploring the challenges faced by FAMSA in implementing the Department of Social Development’s Fatherhood Strategy. A qualitative research methodology was implemented to gather information from FAMSA and DSD. Findings from literature revealed that the fatherhood strategy has been a concern worldwide evidenced by the high levels of father-child non-residency. Data from this study revealed that FAMSA had been implementing the programme effectively regardless of numerous challenges that include funding human resources. Conclusively, a lot must be done to advocate for fatherhood. Recommendations also point to the need for several interventions which need to be done in research, social work practice and also policy formulation and development. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2023
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- Date Issued: 2023
Exploring preparedness of social workers to address the environmental justice issue in communities: the case of selected dumping sites in King Sabata Dalindyebo (KSD) municipality, Eastern Cape
- Authors: Njama, Thembani https://orcid.org/0000-0002-8306-6501
- Date: 2020-06
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22423 , vital:52064
- Description: Social workers are mandated to address environmental justice issues as part of working towards promoting community and environmental sustainability within and between communities. This thesis reports from a research study that was aimed at exploring the preparedness of social workers to address pollution in King Sabata Dalindyebo communities with the objective to: understand the social work intervention strategies social workers use to address pollution in KSD communities; identify the challenges if any social workers face when addressing pollution in KSD communities; and explore the confidence of social workers when addressing pollution in KSD communities. To achieve its aim and objectives, this study was exclusively informed by a qualitative research approach and thus utilised an explorative case study design to obtain in-depth qualitative data. Semi-structured interviews were conducted with twelve social workers using a semi-structured interview guide. The interviewed social workers were sampled utilizing convenience and snowball sampling techniques. Mass collected data was analysed thematically and thus presented according to themes and subthemes. Findings indicated that social workers are not sufficiently prepared to address pollution in KSD communities because of lack of environmental education and training, coupled with lack of enabling resources. Therefore, this study recommended environmental social work education and training through organisational workshops as well as improved support and resourcing. This study also recommended a future study that will explore the progress of social work towards promoting environmental sustainability in communities. , Thesis (MSW) -- Faculty of Social Sciences and Humanities, 2021
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- Date Issued: 2020-06