Showing items 54441 - 54460 of 63270

Seey

- Vieux Marius Seck (composer, lead singer, rhythm guitar, accoustic guitar, chorus), Racine Ly (solo guitar), Ousmane Wade (keyboard), Youssou Camara (drums), Moussa Traore (percussions), Sam Thiam (tama), Fama Lo (chorus), Samba Laobe Ndiaye (bass guitar, arranger, recorded by), Studio 2000

VaKriste yatu lyeko ku kutu rwa Hompa

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Kongoroko vhaKriste kongorokenu

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Hompa Tambura Vitapha vhyetu

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Twa pura mwa karunga

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Ya mupande Hompa karunga wetu

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Yenu Yatu Pande Kumwe Karunga

- Vihemba, Gertraud OSB, Sambiu Folk, Dargie, Dave

Mtoto Mzuri Simwachi

- Vijana wa Mbeya, Composer Not Specified, Tracey, Hugh

Siwezi Kulaoha Rumba

- Vijana wa Mbeya, Composer Not Specified, Tracey, Hugh

The Impact of Energy Consumption on The Profitability and Renewable Energy Preference among SMEs in The KSD Municipality

- Vikela, Sithole Liso

  • Authors: Vikela, Sithole Liso
  • Date: 2019-03
  • Subjects: Energy consumption , Cost effectiveness
  • Language: English
  • Type: Master's/Doctoral theses , text
  • Identifier: http://hdl.handle.net/11260/6730 , vital:47570
  • Description: This study investigated the impact of energy consumption on the profitability and renewable energy preference among SMEs in the King Sabata Dalindyebo (KSD) local municipality. Cross sectional data was collected using a questionnaire and the adoption of information acceleration (IA) technique. The theoretical framework applied in this study is the theory of consumer-fuel-energy choice which is based on the energy ladder model and the associated fuel switching. Short-run sensitivity analysis (SRA), cost-benefit analysis (CBA) and multinomial logit model (MNL) were employed to measure the profitability and switching behaviour of the firms. SRA showed that the average monthly profit/loss by all firm categories were positive indicating a profit in the consumption of non-renewable energy (NRE). In contrast, results showed that all categories of the firms’ ran at loss if they were to switch to the renewable energy (RE) immediately. Results for CBA indicate that only RE system option satisfied the economic viability of all the three CBA decision criteria on both discount rates, proving to be a viable investment choice for all firm categories. The MNL regression results showed that the number of rooms, firm revenue, irregular power experiences, product information, price, business age, firm grades, gender of the respondent, and the educational levels have a statistically significant impact on willingness to switching from substantial to full willingness. The study recommends establishment of financial subsidy to SMEs to enable them switch to RE system. The research also suggests the need for policies and incentives on profit enhancing strategies, symmetric product information and environmental benefits for switching to RE by SMEs in the rural areas. Key words: Energy consumption, Profitability, Willin¬gness to switch, Cost-Benefit analysis, Multinomial logit model. , Thesis (MCom) -- Faculty of Commerce and Administration, 2019
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  • Date Issued: 2019-03

Marine Plastic Pollution

- Vilakazi, Bathobile Thandazile Unittah

  • Authors: Vilakazi, Bathobile Thandazile Unittah
  • Date: 2021-12
  • Subjects: Waste minimization --Law and legislation -- South Africa , Plastic marine debris , South Africa
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10948/55605 , vital:53364
  • Description: Human activities can alter the ordinary operation of Earth-system processes in such a way that it escalates risks in societies across the globe. One of the more visible human activities is the production, consumption and disposal of plastic items and/or materials, the consequences of which are borne by marine life. The dissertation is founded on the premise that conservation of the marine environment must be a priority for all States. States must take responsibility for the prevention of pollution of the marine environment and further take accountability where activities within their territory are causing pollution of the marine environment through the enforcement of legislative measures. The dissertation is drafted in a manner that aims to ultimately deduce whether the current pollution laws in South Africa adequately address marine plastic pollution (MPP). As such, Chapter Two relies on the regulatory position of MPP at the international level. Various legal instruments relating to marine pollution are expounded on such as the LOSC, MARPOL, London Convention and other regional instruments relating particularly to the African continent. The chapter aims to detail the most relevant global instruments that South Africa is a party to and which promote and mandate States parties to protect the marine environment through the implementation and enforcement of regulatory measures. The global measures either exclusively address MPP or provide general provisions for marine environment protection. Chapter Three and Four of the dissertation provide a critical analysis of the legal measures adopted at the national, provincial and local levels respectively to control, reduce and prevent pollution, including MPP. The Constitution of the Republic of South Africa, 1996 requires the national, provincial and local levels of government to co-operate with each other to provide ―effective, efficient, transparent, accountable and coherent governance‖. Therefore, it is essential for this study to investigate the regulation of MPP at all levels of government particularly when the programmes of the national and provincial government must be implemented by local government. The regulatory measures at these levels of government promote the protection of the environment and further prohibit the illegal dumping of waste and littering. They also encourage communities to reduce, re-use and recycle waste. Additionally, the national government further commits itself to adopting regulations to x plastic carrier bags and plastic flat bags. These regulations will urge the plastic industry to produce recyclable plastic bags which will further encourage consumers to recycle and therefore, decrease the entry of plastic into the marine environment. The conclusion in Chapter Five is inferred from Chapter One to Chapter Four of the dissertation. Several shortcomings were observed in the regulatory measures discussed in Chapter Three and Chapter Four, most of which relate to a legal framework weakened by a lack of knowledge on MPP and therefore, an inability to firstly develop measures that expressly deal with the issue, or secondly, develop comprehensive legislative measures that address various types of marine pollution. It is therefore submitted that although South Africa‘s pollution laws in general are exceptional and do address marine pollution, they fail to address MPP sufficiently. As such, Chapter Five presents several policy recommendations in reaction to the findings. , Thesis (LLM) -- Faculty of Law , Public Law, 2021
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  • Date Issued: 2021-12

An epistemic justice account of students’ experiences of feedback

- Vilakazi, Bella Phetheni

  • Authors: Vilakazi, Bella Phetheni
  • Date: 2022-04-08
  • Subjects: Feedback (Psychology) , Experience , Narrative inquiry (Research method) , Critical thinking , Caring Moral and ethical aspects , ‎Epistemic access
  • Language: English
  • Type: Doctoral thesis , text
  • Identifier: http://hdl.handle.net/10962/232599 , vital:50006 , DOI 10.21504/10962/232599
  • Description: I am a storyteller. I believe in the power of stories to share experiences and to elucidate thoughts and ideas and to help us to make sense of complex social practices. This thesis includes the stories of five young women who were learning to become teachers. As they shared their stories with me, I share them with you. This study includes their stories of receiving feedback. These stories are structured within the Narrative Inquiry dimensions of temporality, place and context. These dimensions suggest that stories are historical and move through time, stories are shaped by place and the context in which they unfold (Clandinin, 2013). Furthermore, these stories demonstrate how feedback can serve to give access to powerful knowledge and can serve to recognise who our students are and what they bring to the academy (Hordern, 2018). But feedback can also serve to misrecognise. Much has been written and reported about the barriers preventing students from acting on the feedback on their assignment tasks in higher education. In this study, I argue that feedback is a pedagogic practice that can support students to gain epistemic access. Feedback can only achieve this if it makes the expectations explicit for students to make sense of and make meaning for themselves and if it is offered in a dialogical format which recognises the students, their attempts, their identities, and their knowledge. The research question of this study, ‘How do experiences of forms of feedback affect female undergraduate student teachers’ chances of epistemic access?’, is not unusual. There have been many research projects that have been carried out that examine students’ experiences of feedback (for example, Evans, 2013; Basey, Maines, & Francis, 2014; Nicol et al.; 2014; Carless, 2019; Winstone et al., 2021). But I identified a gap where feedback has not, to my knowledge, been studied directly through the lenses of Epistemic Justice towards Parity of Participation. This study interpreted five undergraduate student teachers’ feedback experiences through these lenses. Narrative inquiry enabled me to design this study in ways that foregrounded experience. Data was collected through multiple conversations during which I organised the participants’ life stories of feedback within the dimensions of temporality, place and context, and sociality. Miranda Fricker’s (2007) theory of Epistemic Justice and Fraser’s norm of Parity of Participation (2000) framed this study. I engaged with Fricker and Fraser’s literature meaningfully as a reader and researcher. I established an understanding of how the lenses offered by Fraser and Fricker allowed me to make sense of the literature more generally, in social life and on the pedagogic practice of feedback. Fricker’s theory of Epistemic Justice considers the epistemically unjust, gendered, raced and classed, experiences of epistemic agents. Fricker (2007) draws on two central concepts to account for epistemic injustices: Testimonial Injustice and Hermeneutical Injustice. Fricker (2007; 2003) explains that testimonial injustice occurs within a testimonial exchange setting, when an epistemic agent as a speaker gives testimony of the epistemic agent’s experiences and knowledge but is not awarded the credibility the speaker deserves (Fricker, 2003). Epistemic agents who participate in a testimonial exchange need to overcome bias and prejudice in order to evaluate testimonies with the degree of fairness the testimony deserves (Fricker, 2013; 2016). Hermeneutical injustice occurs when an epistemic agent is unable to make sense and make meaning of their social experiences. Hermeneutical injustice strengthens when the epistemic agent is prevented from gaining access to resources that might help with sense making and meaning making of these social experiences (Dielman, 2012; Fricker, 2016). To ensure that meaning can be made between people and groups of people, there needs to be some shared understandings of the purpose and process of sense making and meaning-making – or a willingness to co-create such shared understandings. Fraser’s norm of Participatory Parity enabled a consideration of the larger world of political and economic systems that give rise to social injustice. In this study, the theories of Fricker and Fraser are used to illuminate experiences of feedback of the five undergraduate student teachers who are the participants in this study and how these translate to epistemic and social injustice. The norm of Participatory Parity is considered where feedback allowed or restricted participants from participating on an equal footing in the feedback process. Narrative inquiry, a research methodology that is used to study experiences, was used to inform research strategies of this study. Participants’ experiences, data collection and organising the narratives demonstrated the dimensions of temporality and space. The thesis includes biographical vignettes for each of the participants in the study, interspersed with data from across all five participants. The key findings of this study show that feedback generally operates at the surface levels of grammar correction. In light of the theoretical lenses of this study, I argue that the feedback experiences they shared generally did not recognise their attempts and the identities and knowledges they brought to the tasks. Because the focus was on superficial correction of the specific task, the feedback failed to create conditions for the (re)distribution of knowledge. At times the feedback exerted power on participants. Because the feedback was generally in the form of one directional correction (with little space for interaction with the feedback or dialogue with the assessor), this caused status subordination of participants in the epistemic spaces of teaching practice. Lastly, the lack of clarity of feedback was harmful to the potential for dialogical feedback. Such feedback caused participants to experience forms of epistemic injustice in the form of hermeneutical injustice where it failed to create conditions for the distribution of knowledge. Feedback also caused participants to experience testimonial injustice where it failed to create conditions for recognising participants’ processes of sense-making and meaning-making in the various assignment tasks. Participatory Parity could not occur because the processes of recognition and redistribution were constrained. Feedback then created fertile conditions of epistemic injustice to occur, and participants were likely to have failed to gain the much needed epistemic access. This study is not the story of bad, uncaring academics; the study acknowledges the context of large classes and heavy workloads in which feedback is or is not given. Rather, this is the story of five women trying to make their way through the university and out into the world as teachers. The study calls for better theorising of feedback and more support for both academics and students to develop feedback literacy so that feedback might serve as a dialogical pedagogic practice that enables epistemic justice. , Thesis (PhD) -- Faculty of Education, Centre for Higher Education Research, Teaching and Learning, 2022
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  • Date Issued: 2022-04-08

An evaluation of entrepreneurial skills needed for emerging black entrepreneurs within the Western Cape

- Vilakazi, Ezekiel

  • Authors: Vilakazi, Ezekiel
  • Date: 2011
  • Subjects: Entrepreneurship -- South Africa -- Western Cape , New business enterprises -- South Africa -- Western Cape , Business education
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8816 , http://hdl.handle.net/10948/d1018809
  • Description: South Africa’s economy is in a phase of transformation. As part of this process, the South African government has identified the development of economic activities amongst previously disadvantaged black communities. However, this noble intent is challenged by a lack of entrepreneurial skills, which are seen as important elements in the economic development effort and necessary to achieve transformation goals and objectives (Smith, 2004). Since the apartheid era, South Africa has seen the emergence of two distinct economic sectors: a first world economy, consisting mostly of white owned and formal businesses, and a third world economy, consisting of mostly black owned and informal businesses. Economic activities of emerging entrepreneurs have been restricted to mostly the black townships and rural areas, whereas first world entrepreneurs have been actively involved in mainstream economic activities. The separation of emerging and first world entrepreneurs has resulted in a wide gap in entrepreneurial and technical skills and knowledge between the two. This imbalance has maintained a situation in which the minority of the population controls more than 80 per cent of the wealth of the country. Upon gaining independence in 1994, the new South African government embarked on the Reconstruction and Development Programme (RDP) to redress the imbalances of the past (GEM, 2001; GEM, 2002). The government has since also adopted the Growth Employment and Redistribution (GEAR) macroeconomic strategy to grow the economy, create employment and redistribute wealth. To accelerate the implementation of GEAR, the government has passed a number of Acts, namely: The National Small Business Promotion Act (102/1996), Skills Development Act (97/1998), Affirmative Procurement Act (5/2000), Mineral and Petroleum Resources Act (28/2002) and, most recently, the Mining Charter (2003), Petroleum Charter (2003), Financial services Charter (2003), and the Information Communications Technology (ICT) Charter (2004). Small business has been seen by government as a vehicle to create employment, promote economic growth and redistribute wealth; as such the promotion of entrepreneurship has been identified as a critical aspect of GEAR. However, despite supportive legislation and programmes, South Africa’s entrepreneurship rating remains below average, as evidenced by the findings of the Global Entrepreneurial Monitor reports (GEM, 2001; GEM, 2002). The wide gap in skills and knowledge between emerging and first world entrepreneurs in South Africa is a contributing factor to the country’s poor rating – and it is expected to widen as the new knowledge economy unfolds, if corrective measures are not taken by the government or private sector.
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  • Date Issued: 2011

The relationship between exposure to traumatised complainants and secondary traumatic stress among police detective officers

- Vilakazi, Julias Makhosonke

  • Authors: Vilakazi, Julias Makhosonke
  • Date: 2019
  • Subjects: Police -- Job stress -- South africa , Traumatic shock -- Psychological aspects
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/45668 , vital:38925
  • Description: South Africa is faced with high incidents of sexual violence and abuse, affecting a large part of the population either directly or indirectly.Previous studies have shown that a contact with victims of violent crime may cause psychological symptoms of Secondary traumatic Stress (STS) in police officers. Despite this knowledge, there appears to be a lack of studies that focus specifically on police detective officers (PDOs) in South Africa. Aim: This study aimed to investigate the relationship between exposure to traumatic complainants and STS among PDOs in the SAPS-FCS unit. Findings: The results have shown that most of the PDOs were exposed to traumatised complainants as they often conduct investigation, testify in court, escort complainants for biopsychosocial services and collect evidence from both complainants and perpetrators. The study further found that most PDOs were experiencing a degree of STS symptoms. Additionally, no significant statistical relationship was found between exposure to traumatised complainants and STS. Nonetheless, there is a statistically significant relationship between type of crimes and STS among PDOs in the SAPS-FCS unit. This study sheds light on how the PDOs are indirectly affected by the crimes experienced by complainants’, such as indecent assault and child molestation. This research can be used as a platform for the development of various interventions with police officials exposed to or affected by indirectly trauma. Future research should investigate other pivotal risks and protective factors such as environmental factors and personal factors that may have impacted on the development of STS in the PDOs.
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  • Date Issued: 2019

Catalytic behaviour of metallophthalocyanines towards the detection of nitric oxide

- Vilakazi, Lea Sibulelo

  • Authors: Vilakazi, Lea Sibulelo
  • Date: 2002
  • Subjects: Electrochemistry Nitric oxide
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4418 , http://hdl.handle.net/10962/d1006852
  • Description: Electrocatalytic reduction and oxidation of nitric oxide (NO) using cobalt phthalocyanine complexes have been studied and compared to vitamin B₁₂ and other metallophthalocyanine (MPc) complexes. Modifying a glassy carbon electrode with these complexes resulted in improved sensitivity of the electrode allowing detection of NO to 10⁻⁹ mol dm⁻³. The mechanisms of catalysis were studied. Electrocatalysis of NO involves coordination of NO to the MPc complex. Hence catalytic activity is affected by the nature of the metal center. However coordination of NO to the MPc complex has to be reversible to eliminate poisoning of the electrode. Though FePc gave the best sensitivity and lowered the reduction potential more than CoPc, the strong Fe-NO bond resulted in the poisoning of the electrode hence, rendering the electrode unstable. Rate constants for NO coordination to the MPc complexes were studied. These rates were smaller than the studied NO porphyrin coordination rates. Electrocatalytic reduction of NO using MPc complexes involves a transfer of an electron from the metal center to the NO ligand. Hence, substitution of electron-donating grohps on the cobalt pthalocyanine complex resulted in improved sensitivity and catalytic activity. A CoPc modified microelectrode (11μm) was used to monitor NO in human blood components and to detect NO in a rat brain. Detections of NO were also done in aqueous solutions in the presence of interfering species such as dopamine and serotonin. An interaction between NO and serotonin was observed.
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  • Date Issued: 2002

Electrocatalytic behavior of cobalt phthalocyanine complexes immobilized on glassy carbon electrode towards the reduction of dicrotophos pesticide

- Vilakazi, Sibulelo, Nyokong, Tebello, Fukuda, Takamitsu, Kobayashi, Nagao

  • Authors: Vilakazi, Sibulelo , Nyokong, Tebello , Fukuda, Takamitsu , Kobayashi, Nagao
  • Date: 2012
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/245832 , vital:51409 , xlink:href="https://doi.org/10.1142/S1088424612501040"
  • Description: Electrocatalytic properties of cobalt phthalocyanine (CoPc), cobalt tetra-carboxy phthalocyanine (CoTCPc) and cobalt octa-carboxy (CoOCPc), towards the detection of dicrotophos have been studied. Catalytic behavior towards the reduction of dicrotophos was found to be dependent on the pH, as well as the substitution on the phthalocyanine ring. Strong electron withdrawing groups on the phthalocyanine ring yielded best catalysis as evidenced by the enhancement of the reduction peak current, (~5 fold) compared to the bare glassy carbon electrode. The analysis gave a good detection limit of 1.25 × 10-7 M, and good linearity for the studied concentration range. A high Tafel slope value was obtained, indicating a strong interaction between dicrotophos and the cobalt phthalocyanine complex.
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  • Date Issued: 2012

Interaction of nitric oxide with cobalt (II) tetrasulfophthalocyanine

- Vilakazi, Sibulelo, Nyokong, Tebello

  • Authors: Vilakazi, Sibulelo , Nyokong, Tebello
  • Date: 2000
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/293235 , vital:57067 , xlink:href="https://doi.org/10.1016/S0277-5387(99)00373-3"
  • Description: The interaction of nitric oxide (NO) with cobalt(II) tetrasulfophthalocyanine [Co(II)TSPc]4−) has been studied. Coordination of NO is accompanied by electron transfer from the central metal in [Co(II)TSPc]4−, the resulting complex being represented as [(NO−)Co(III)TSPc]4−. The rate constant for the formation of this species is kf=142±7 dm3 mol−1 s−1 and an equilibrium constant of 3.0±0.5×105 dm3 mol−1 was obtained. When adsorbed to a glassy carbon electrode, [Co(II)TSPc]4− catalyses the oxidation and reduction of NO, with a detection limit of the order of 10−9 mol dm−3. Ammonia and hydroxylamine are some of the reduction products obtained for the reduction of NO on [Co(II)TSPc]4−-modified glassy carbon electrodes.
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  • Date Issued: 2000

Interaction of nitric oxide with cobalt (II) phthalocyanine

- Vilakazi, Sibulelo L, Nyokong, Tebello

  • Authors: Vilakazi, Sibulelo L , Nyokong, Tebello
  • Date: 1998
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/293579 , vital:57100 , xlink:href="https://doi.org/10.1016/S0277-5387(98)00244-7"
  • Description: The coordination of nitric oxide (NO) to cobalt(II) phthalocyanine (CoPc) in dimethyl sulphoxide (DMSO) has been studied. CoPc coordinates with NO in a 1:1 ratio, forming a CoPc(NO) species. The IR band observed at 1680 cm−1 is assigned to the coordinated NO. In the presence of excess NO, pseudo first order kinetics were followed. The observed rate constant, kf, was determined to be 15.0±0.3 dm−3 mol−1 s−1 and the equilibrium constant was K=5.4±0.4×104dm3 mol−1. Solution or adsorbed CoPc catalyses the reduction of NO. The products of reduction include NH3 and NH2OH.
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  • Date Issued: 1998

Electrocatalytic properties of vitamin B12 towards oxidation and reduction of nitric oxide

- Vilakazi, Sibulelo Lea, Nyokong, Tebello

  • Authors: Vilakazi, Sibulelo Lea , Nyokong, Tebello
  • Date: 2000
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/293196 , vital:57064 , xlink:href="https://doi.org/10.1016/S0013-4686(00)00628-9"
  • Description: This paper reports on the catalytic behaviour of cyanocobalamin (VB12) towards the reduction and oxidation of nitric oxide. When VB12 is adsorbed on glassy carbon electrodes, it catalyses the reduction of nitric oxide (NO) in pH 4 and 9 buffers. In the absence of NO, cyclic voltammetry shows that VB12 is reduced by a one-step two-electron reduction from CoIII to the CoI species. Addition of NO at pH 9 to solutions of VB12 resulted in the splitting of the cyclic voltammetry peaks as a result of a consecutive one-electron reduction of the central CoIII metal in VB12 to CoII and finally to CoI. The catalytic peak for oxidation of NO on a glassy carbon electrode modified with VB12 was observed at 1.21 V versus Ag∣AgCl, at pH 9. The products of the catalytic reduction of nitric oxide include ammonia and hydroxylamine.
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  • Date Issued: 2000

Voltammetric determination of nitric oxide on cobalt phthalocyanine modified microelectrodes

- Vilakazi, Sibulelo Lea, Nyokong, Tebello

  • Authors: Vilakazi, Sibulelo Lea , Nyokong, Tebello
  • Date: 2001
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/291629 , vital:56893 , xlink:href="https://doi.org/10.1016/S0022-0728(01)00583-6"
  • Description: The catalytic activity of a carbon fiber microelectrode modified with cobalt phthalocyanine (CoPc-ME) for the detection of nitric oxide in the presence of possible interfering molecules (dopamine and serotonin) is examined. A linear plot is observed for the variation of the catalytic currents with NO concentration in the presence of excess dopamine and serotonin, showing that NO may be determined in the presence of these molecules. However, oxidation currents due to serotonin were found to decrease with increase in NO concentration. The CoPc-ME could also detect NO added to blood or its components, the oxidation currents for NO, however, decreased rapidly with time. The decrease in currents was slower in blood serum, followed by whole blood, with a faster decrease being observed in blood plasma.
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  • Date Issued: 2001
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