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Orchid mycorrhizal and endophytic fungal diversity of three cooccurring terrestrial orchids in the large African genus Disa (Orchidaceae)

  • Authors: Le Du, Bridgitte M
  • Date: 2020
  • Subjects: Uncatalogued
  • Language: English
  • Type: thesis , text , Masters , MA
  • Identifier: http://hdl.handle.net/10962/163363 , vital:41033
  • Description: Thesis (MA)--Rhodes University, Faculty of Humanities, English Language and Linguistics, 2020.
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  • Date Issued: 2020

Organisational influences and the effects on female advancement within a South African technology organisation

  • Authors: Hare, Claire Kim
  • Date: 2020
  • Subjects: Women in technology -- South Africa -- Eastern Cape.
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: http://hdl.handle.net/10948/48136 , vital:40503
  • Description: The underrepresentation of females within various sectors, specifically the technology industry, remains a concern. Even though there is progression regarding the representation of women in the technology industry, females and other diverse groups are still underrepresented within the IT workforce. Globally, women make up only 25% of technology workers and only 23% of technology workers in South Africa are female. The underrepresentation of women in technology jobs results in the industry lacking an immense amount of brainpower and the potential for innovation. Against this background, the primary objective of this study was to identify the impact that the organisational influences i.e. leadership, organisational culture, barriers and organisational change management has on the advancement of females within a technology organisation. This study was conducted within a South African technology organisation located within the Eastern Cape region. A quantitative approach was adopted, and purposive sampling was used to draw the sample of approximately three hundred personnel, including all managers and employees, within the South African technology organisation for this study. Various findings emerged in terms of the research questions about whether the organisational influences of leadership, organisational culture, barriers and organisational change management has an impact on the advancement of females within the technology organisation. The empirical results revealed that leadership and organisational change management have the strongest positive influence on the advancement of females within the organisation. A key finding within this study is that leadership within the organisation does not promote female advancement. Since literature suggests that leadership is instrumental in shaping the organisational culture of an organisation, the focus of the organisation should be on equipping leadership with the knowledge and skills to influence the rest of the organisation regarding gender equality. An additional recommendation is that the women who currently occupy leadership positions within the organisation could mentor other females to overcome or cope with prejudice and gender experienced.
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  • Date Issued: 2020

Organisational justice as a predictor of organisational citizenship behaviour among academic employees at the University of Fort Hare in South Africa

  • Authors: Matsungo, Forget
  • Date: 2020
  • Subjects: Organizational change Universities and colleges -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MCom (Industrial Psychology)
  • Identifier: http://hdl.handle.net/10353/12458 , vital:39265
  • Description: This research was designed to examine the relationship between Organisational Justice (OJ) constructs and Organizational Citizenship Behaviour (OCB). This study was based on social exchange theory, the norm of reciprocity. The sample for the study consisted of 184 academic members of staff from the University of Fort Hare in the Eastern Cape Province, South Africa. Moorman and Niehoff (1993). Organizational Justice Scale was used to measure justice and Podsakoff, MacKenzie, Moorman, and Fetter’s (1990) OCB Scale was used to measure extra role behaviours. Data analysis was done by means of the Spearman Rank Order Correlation Coefficient and Multiple Regression Model using the Statistical Package for Social Sciences (SPSS) version 25. The findings revealed a positive and significant relationship between OJ and OCB. More specifically, OJ was revealed be significantly positively associated with the measures of OCB (courtesy, altruism, civic virtue, conscientiousness, and sportsmanship) at the University of Fort Hare. Therefore, to improve work performance it is imperative that the university should continuously ensure and promote: fairness in their decisions relating (distributive justice); fairness of the methods, mechanisms, processes, and procedures used to determine the decisions or outcomes (procedural justice); as well as fairness in the quality of the interpersonal treatment employees receive within the work environment (interactional justice). This is particularly so, because when employees perceives that there is emphasis on justice or fairness (procedural justice, distributive justice, and interactional justice) within the organisation, they may reciprocate this gesture by displaying desirable discretionary work related behaviours. Theoretical and managerial implications and suggestions for future research are discussed
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  • Date Issued: 2020

Parents’ perceptions of the content of pre-school lunch boxes following a nutritional programme in Nelson Mandela Bay

  • Authors: Midigo, Odwour Erich
  • Date: 2020
  • Subjects: Children -- Nutrition
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/46429 , vital:39587
  • Description: Rationale: Lunchboxes that parents prepare for preschool children have been noted to fall short of the recommended paediatrics dietary standards. No research has been done in Nelson Mandela Bay (NMB) to describe the perceptions of parents preparing the lunch boxes, particularly in underprivileged communities, and if nutrition education strategies can improve these practices. This study answered the following research question: How can nutrition education programmes play a role in parents’ perceptions about the content of the lunchboxes of children attending early childhood development centres (ECD) in underprivileged communities of NMB metropole? Aim: The research aimed at describing and exploring parents’ perceptions of the content of pre-school children’s lunch boxes following a nutrition programme.Methods: This descriptive, explorative study adopted a qualitative approach. Twenty-five participants were selected conveniently while five pre-schools were purposively sampled. Following the nutrition programme, data was collected through five Focus Group (FG) discussions and five interviews and was thematically analysed. The ethical principles that guided the study included justice, beneficence and autonomy. Results and Discussion: Five major themes and seventeen sub-themes emerged (1) Participants described the typical foodstuff in children’s lunch boxes which included both high quality and lower-quality foods and fluids; (2) Participants provided views (such as food preferences) on lunch box choices; (3) Principals appraised lunch box rules and the significance of revised rules to improve the lunch boxes;(4) Challenges such as poverty limited healthy food choices; (5) Participants commented on initiatives noted following the nutrition training; for instance, some schools commenced the cultivation of vegetable gardens. Conclusion and Recommendations: The study highlights that specific parent programmes helped to improve healthy lunch box choices in the study population. There is a need for parent programmes tailored to fathers. Dieticians and nutritionists in NMB can train practitioners as change agents in their respective schools.
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  • Date Issued: 2020

Passphrase and keystroke dynamics authentication: security and usability

  • Authors: Bhana, Bhaveer
  • Date: 2020
  • Subjects: Computer security -- Management , Computers -- Access control -- Codewords , Computers -- Access control -- Keystroke timing authentication , Entropy (Information theory)
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/146663 , vital:38546
  • Description: It was found that employees spend a total 2.25 days within a 60 day period on password related activities. Another study found that over 85 days an average user will create 25 accounts with an average of 6.5 unique passwords. These numbers are expected to increase over time as more systems become available. In addition, the use of 6.5 unique passwords highlight that passwords are being reused which creates security concerns as multiple systems will be accessible by an unauthorised party if one of these passwords is leaked. Current user authentication solutions either increase security or usability. When security increases, usability decreases, or vice versa. To add to this, stringent security protocols encourage unsecure behaviours by the user such as writing the password down on a piece of paper to remember it. It was found that passphrases require less cognitive effort than passwords and because passphrases are stronger than passwords, they don’t need to be changed as frequently as passwords. This study aimed to assess a two-tier user authentication solution that increases security and usability. The proposed solution uses passphrases in conjunction with keystroke dynamics to address this research problem. The design science research approach was used to guide this study. The study’s theoretical foundation includes three theories. The Shannon entropy formula was used to calculate the strength of passwords, passphrases and keystroke dynamics. The chunking theory assisted in assessing password and passphrase memorisation issues and the keystroke-level model was used to assess password and passphrase typing issues. Two primary data collection methods were used to evaluate the findings and to ensure that gaps in the research were filled. A login assessment experiment collected data on user authentication and user-system interaction for passwords and passphrases. Plus, an expert review was conducted to verify findings and assess the research artefact in the form of a model. The model can be used to assist with the implementation of a two-tier user authentication solution which involves passphrases and keystroke dynamics. There are a number of components that need to be considered to realise the benefits of this solution and ensure successful implementation.
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  • Date Issued: 2020

Passphrase and Keystroke Dynamics Authentication: Usable Security

  • Authors: Bhana, Bhaveer , Flowerday, Stephen
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/158372 , vital:40178 , https://doi.org/10.1016/j.cose.2020.101925
  • Description: It was found that employees spend a total of 2.25 days within 60 days on password-related activities. The time consumed by this is unproductive and has a negative impact on usability. The problem is caused by current text-based user authentication policies in use. This study aims to address this research problem by assessing the effectiveness of a proposed two-tier user authentication solution involving passphrases and keystroke dynamics.
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  • Date Issued: 2020

Patient acceptance of HIV testing services in rural emergency departments in South Africa

  • Authors: Aditi Rao , Caitlin Kennedy , Pamela Mda , Thomas C. Quinn , David Stead , Bhakti Hansoti
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/11260/3270 , vital:43287 , https://doi.org/10.4102/sajhivmed.v21i1.1105
  • Description: Background: South Africa faces the highest burden of HIV infection globally. The National Strategic Plan on HIV recommends provider-initiated HIV counselling and testing (HCT) in all healthcare facilities. However, HIV continues to overwhelm the healthcare system. Emergency department (ED)-based HCT could address unmet testing needs. Objectives: This study examines the reasons for accepting or declining HCT in South African EDs to inform the development of HCT implementation strategies. Method: We conducted a prospective observational study in two rural EDs, from June to September 2017. Patients presenting to the ED were systematically approached and offered a point-of-care test in accordance with national guidelines. Patients demographics, presenting compaint, medical history and reasons for accepting/declining testing, were recorded. A pooled analysis is presented. Results: Across sites, 2074 adult, non-critical patients in the ED were approached; 1880 were enrolled in the study. Of those enrolled, 19.7% had a previously known positive diagnosis, and 80.3% were unaware of their HIV status. Of those unaware, 90% patients accepted and 10% declined testing. The primary reasons for declining testing were ‘does not want to know status’ (37.6%), ‘in too much pain’ (34%) and ‘does not believe they are at risk’ (19.9%). Conclusions: Despite national guidelines, a high proportion of individuals remain undiagnosed, of which a majority are young men. Our study demonstrated high patient acceptance of ED-based HCT. There is a need for investment and innovation regarding effective pain management and confidential service delivery to address patient barriers. Findings support a routine, non-targeted HCT strategy in EDs. Keywords: HIV counselling and testing; South Africa; emergency department; patient acceptance; implementation research; linkage to care.
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  • Date Issued: 2020

Patterns and Pattern Languages for Mobile Augmented Reality

  • Authors: Munro, Donald
  • Date: 2020
  • Subjects: Augmented reality , Educational technology
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10948/48510 , vital:40883
  • Description: Mixed Reality is a relatively new field in computer science which uses technology as a medium to provide modified or enhanced views of reality or to virtually generate a new reality. Augmented Reality is a branch of Mixed Reality which blends the real-world as viewed through a computer interface with virtual objects generated by a computer. The 21st century commodification of mobile devices with multi-core Central Processing Units, Graphics Processing Units, high definition displays and multiple sensors controlled by capable Operating Systems such as Android and iOS means that Mobile Augmented Reality applications have become increasingly feasible. Mobile Augmented Reality is a multi-disciplinary field requiring a synthesis of many technologies such as computer graphics, computer vision, machine learning and mobile device programming while also requiring theoretical knowledge of diverse fields such as Linear Algebra, Projective and Differential Geometry, Probability and Optimisation. This multi-disciplinary nature has led to a fragmentation of knowledge into various specialisations, making it difficult to integrate different solution components into a coherent architecture. Software design patterns provide a solution space of tried and tested best practices for a specified problem within a given context. The solution space is non-prescriptive and is described in terms of relationships between roles that can be assigned to software components. Architectural patterns are used to specify high level designs of complete systems, as opposed to domain or tactical level patterns that address specific lower level problem areas. Pattern Languages comprise multiple software patterns combining in multiple possible sequences to form a language with the individual patterns forming the language vocabulary while the valid sequences through the patterns define the grammar. Pattern Languages provide flexible generalised solutions within a particular domain that can be customised to solve problems of differing characteristics and levels of iii complexity within the domain. The specification of one or more Pattern Languages tailored to the Mobile Augmented Reality domain can therefore provide a generalised guide for the design and architecture of Mobile Augmented Reality applications from an architectural level down to the ”nuts-and-bolts” implementation level. While there is a large body of research into the technical specialisations pertaining to Mobile Augmented Reality, there is a dearth of up-to-date literature covering Mobile Augmented Reality design. This thesis fills this vacuum by: 1. Providing architectural patterns that provide the spine on which the design of Mobile Augmented Reality artefacts can be based; 2. Documenting existing patterns within the context of Mobile Augmented Reality; 3. Identifying new patterns specific to Mobile Augmented Reality; and 4. Combining the patterns into Pattern Languages for Detection & Tracking, Rendering & Interaction and Data Access for Mobile Augmented Reality. The resulting Pattern Languages support design at multiple levels of complexity from an object-oriented framework down to specific one-off Augmented Reality applications. The practical contribution of this thesis is the specification of architectural patterns and Pattern Language that provide a unified design approach for both the overall architecture and the detailed design of Mobile Augmented Reality artefacts. The theoretical contribution is a design theory for Mobile Augmented Reality gleaned from the extraction of patterns and creation of a pattern language or languages.
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  • Date Issued: 2020

Paul Ashwin Transforming university education, a manifesto: A review

  • Authors: McKenna, Sioux
  • Date: 2020
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/185886 , vital:44445 , xlink:href="https://doi.org/10.1007/s10734-020-00641-z"
  • Description: This book is wide-ranging in its focus. It tackles student-centeredness, graduate premiums, credentialing, quality assurance, big data and rankings, and yet it offers a coherent engagement with these and many other contemporary issues. The coherence is brought about by the consistent application of one central idea throughout the book. That is that the value of higher education for both the individual and for society is that it brings the graduate into a transformational relationship with knowledge that changes their sense of who they are and thereby makes possible their doing all number of things in the world.
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  • Date Issued: 2020

Perceived benefits of nature-based experiences as mediators of connectedness with nature: The case of Mystic Mountain

  • Authors: Ward-Smith, Chesney , Naidoo, Tony , Olvitt, Lausanne L , Akhurst, Jacqueline E
  • Date: 2020
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/372782 , vital:66622 , xlink:href="https://doi.org/10.1177/00812463209470"
  • Description: Perceived nature disconnection lies at the heart of the world’s socio-ecological crisis. Finding ways to reconnect with nature is fundamental towards reducing the adverse psychological–social– ecological consequences of this disconnection. Understanding the psychological and social benefits of nature-based experiences is important towards actualising reconnection. This article discusses such benefits for child and adult participants from the Eastern Cape, South Africa. This work stems from Ecopsychology research with an outdoor education centre, Mystic Mountain. The experiences of two groups of children (n=25, aged 10–14years) and adult instructors (n=12, aged 18–50years) were explored using interpretive case-study methodology. Through semi-structured interviews and focus groups, participant observation, and reflexive journaling, data were collected and analysed thematically. This article centralises participants’ perceived psychological and social benefits of nature-based experiences as mediators of deeper self and nature connectedness. Integrating these benefits into nature-based pedagogy-design processes could contribute towards more effective enhancements of nature connectedness, and in turn, foster Earth’s larger flourishment.
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  • Date Issued: 2020

Perceived success of staff retention strategies in South African businesses

  • Authors: Cannon, Leoline Advardo
  • Date: 2020
  • Subjects: Employee retention--South Africa
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: http://hdl.handle.net/10948/47527 , vital:40129
  • Description: To remain competitive, organisations must continuously adapt to their global environment. Hill, Schilling and Jones (2018:81) identifies various key factors with human capital being a key contributor to attaining a competitive advantage. Against this background, the focus of this study was to investigate the organisational factors that impact on the success of employee retention strategies. The drivers in the model adopted for this study included: staff compensation, organisational culture, leadership, career development, staff empowerment and value-based staff recognition. The purpose of the study was to understand the perceived effectiveness of retention strategies in South African businesses. An overview of the literature was provided whereby the importance of retention as a source of competitive advantage was highlighted. The literature identified six strategies that would reduce turnover, and thus have a positive effect on the perceived success of staff retention. The six independent variables, namely organisational culture, staff empowerment, value-based staff recognition, staff compensation, leadership and career development formed the foundation of the theoretical framework.The research paradigm adopted for this research was positivistic and the methodology was quantitative research. The primary data was collected via a survey in a self-administered questionnaire format. Non-probability convenienceand snowball samplingwas used,and the questions were formulated from existing measuring instruments in the literature. A sample size of 237 respondents was surveyed.The statistical data analysis methods included frequency distribution, correlation and multiple linear regression to evaluate the relational aspects of the model to measure the determinants of the success of staff retention.The findings of the study revealed that five variables, namely strategies related to value-based staff recognition, staff compensation, organisational culture, leadership and career development, were significantly related to employee retention. A positive relationship between all the variables and retention was proved in this study.
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  • Date Issued: 2020

Perceptions of employees at an automotive-manufacturing company regarding the use of hearing -protection devices

  • Authors: Ngcipe, Thanduxolo Kemsley
  • Date: 2020
  • Subjects: Hearing aids
  • Language: English
  • Type: Thesis , Masters , MCur
  • Identifier: http://hdl.handle.net/10948/46360 , vital:39592
  • Description: Occupational noise-induced hearing loss (NIHL) develops as a result of continuous excessive noise-exposure levels above 85 dB(A) occupational exposure limit (OEL), over an average period of eight hours per day. Many employees incur hearing loss during a period of five to ten years of employment. Noise-induced hearing loss can be prevented and even be eliminated if the exposed employees adhere to the proper and consistent use of hearing protection devices (HPDs). However, non-compliance makes it impossible to eliminate NIHL. The purpose of the study was to explore and describe the perceptions of employees working in an automotive manufacturing company with regard to the use of HPDs and to make recommendations to the company’s management in relation to the findings of the study. A qualitative, explorative, descriptive and contextual design was used to conduct this study. The research sample comprised all employees working in noise-zone areas above 85 dB(A). Purposive sampling was used to select the research sample. The data were collected by using in-depth interviews. The data analysis was conducted by using Tesch’s method of data analysis. A pilot study was conducted before the main study. Ethical considerations were adhered to throughout the study. The main findings revealed that the participants at the automotive manufacturing company were knowledgeable about the use of different types of HPDs that are used in their work environment even though some participants do not use it all the time. Most employees were aware of the hazardous noise levels emitted by hydraulic presses in their areas, however, some employees become accustomed to the level of noise and ignore using HPDs. Some employees reported use of their preferred types of HPDs. However, issues like comfort design and work-related communications were factors influencing the use of HPDs. In conclusion, it is evident that the people were knowledgeable about the types of hearing protection devices that are used in their areas and the reasons for them. However, the study findings revealed that the employees are not directly involved in selecting the type of HPDs with which they are comfortable. This could have a negative effect on the employees’ morale and their compliance with the use of HPDs. Based on the research findings, the recommendations were made, according to training and future research.
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  • Date Issued: 2020

Perceptions of health care professionals at the Nelson Mandela University of the Auntie Stella sexual and reproductive health education toolkit

  • Authors: Ndlangalavu, Siyasanga
  • Date: 2020
  • Subjects: Sexual health
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/46419 , vital:39589
  • Description: Sexual and reproductive health education in South Africa appears to be failing young people as evidenced by the numbers of unplanned pregnancies and sexually transmitted diseases resulting from poor sexual health decision making. High-risk behaviours amongst youth are likely to be a product of the interplay of multiple risk factors on individual and interpersonal levels. The Auntie Stella: Teenagers Talk about Sex, Life and Relationships, is a sexual and reproductive health education toolkit with developmentally timed interventions for sexual and reproductive health education for adolescents. This tool kit has been successfully utilized in such countries as Zimbabwe, Tanzania, Malawi, Mozambique and Zambia. The study aimed to establish if the University health care professionals, including HIV counsellors and nurses, perceive Auntie Stellato be a useful sexual health and reproduction education programme to generate knowledge and prompt and promote safer sexual behaviour. An exploratory descriptive qualitative research design was be utilized, and purposive sampling was employed. Data was collected via focus groups where the toolkit was administered and discussed. Six focus groups were conducted with 12 participants from the Nelson Mandela University’s Campus Health Clinics. The data obtained was analyzed using Braun and Clarke’s (2006) six-step method of thematic analysis. The findings of this study revealed that the Nelson Mandela University health care professionals perceived the Auntie Stellatoolkit as being useful and applicable to the university context in terms of relatability. They expressed thatthe programme is ideally youth-friendly and appropriate for university students. The findings of this small study may have important implications for future research of implementation of sexual and reproductive health education programmes in Higher Education Institutions.
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  • Date Issued: 2020

Perceptions of the preparedness of pharmacy graduates for internship responsibilities in the industrial pharmacy

  • Authors: Putsoane, Mathabelo Maliboche
  • Date: 2020
  • Subjects: Pharmacy students
  • Language: English
  • Type: Thesis , Masters , MPharm
  • Identifier: http://hdl.handle.net/10948/46395 , vital:39593
  • Description: Pharmacy graduates in South Africa are expected to undertake a compulsory one-yearinternship in diversepharmacy settings. These settings includethe industrial pharmacy sector,where they are expected to integrate furtherthe knowledge and skills they have acquired during their undergraduate training before entering into the pharmacy profession. The success of graduatesduring the internship,therefore, depends amongst other thingson their perceptions of preparedness. However, the perceptions of South African pharmacy graduates preparedness for the industrial pharmacy settingis not reportedin light of the shift in global pharmacy education from product-based to patient-based education which thus provided the impetus for this study.Semi-structured interviews with individual pharmacy graduateswere utilised to explorethe perceptions of the preparedness regarding the technical and generic skills required of an industrial pharmacy intern. Inductive data analysisculminated in thedevelopment of themes and subthemes. A lack of preparedness as perceived by graduateswas a result of a lack of industrial pharmacy experientialwork-basedpractical training and patient-focused education. Graduates perceived themselves to be fairly prepared with communication and teamwork skills; however, their problem-solving skills werenot clear due tothe scope of work ofanintern pharmacist which hinders them from solvingproblems.Though graduates expressed that they had acquired adequate theoretical training, the lack of practical application resulted in inadequate technical skills preparedness. Graduatespreparedness for the industrial pharmacy can be improved by work-based placements of students in the industry pharmacy setting which will assist students to integrate theory with practice.
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  • Date Issued: 2020

Perceptions of the sugar-sweetened beverage tax in South Africa: a comparative study

  • Authors: Jankeeparsad, Thanesha Reddy
  • Date: 2020
  • Subjects: Soft drinks -- Taxation -- South Africa , Carbonated drinks -- Taxation -- South Africa , Soft drinks -- Health aspects , College students -- South Africa -- Attitudes
  • Language: English
  • Type: text , Thesis , Masters , MCom
  • Identifier: http://hdl.handle.net/10962/142324 , vital:38070
  • Description: This exploratory, comparative study aimed to investigate perceptions of the participants in the study in South Africa regarding the tax on sugar-sweetened beverages. The study further aimed to compare these perceptions with perceptions identified in selected foreign jurisdictions that have levied the tax on sugar-sweetened beverages. A voluntary, paper-based, anonymous survey questionnaire that included both closed- and open-ended questions was selected as the primary method of data collection. This questionnaire was administered to post-graduate Bachelor of Commerce Accounting and Postgraduate Diploma in Accounting students, aged twenty-one years and older, studying at three residential universities in South Africa, during the 2018 academic year. An extensive analysis of literature available on sugar-sweetened beverage taxes, both locally and internationally, was conducted. The two main constructs (construct 1: perception of the sugar-sweetened beverage tax and the price of sugar-sweetened beverages and construct 2: the social impact of the sugarsweetened beverage tax) were then analysed using descriptive statistics. This study found that there is a significant association between gender and perception that the sugary beverage levy will be beneficial to health, with female perceptions of the benefit of the sugary beverage levy being greater than that of males. Respondents appear to have a positive perception of the sugary beverages levy, understand the sugary beverage levy, as well as the health benefits that will be derived from the levy. Respondents supported the tax on sugar-sweetened beverages if the revenue generated was used to improve the health care system and if the price of healthy foods decreased. Female respondents were found to drink fewer sugarsweetened beverages than male respondents, but females reported higher sugar-sweetened beverage consumption during stressful periods. The current study can possibly provide policy makers with more information regarding acceptance of the sugar-sweetened beverage tax and shape guidelines for future amendments of the tax imposed.
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  • Date Issued: 2020

Performance of an integrated algal pond for treatment of domestic sewage: a process audit

  • Authors: Dube, Anele
  • Date: 2020
  • Subjects: Water -- Purification , Sewage -- Purification -- Anaerobic treatment , Algae -- Biotechnology , Waste disposal -- South Africa , Integrated algae pond systems (IAPS)
  • Language: English
  • Type: text , Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/167043 , vital:41432
  • Description: Integrated algae pond systems (IAPS) are energy efficient, robust, passive systems that use the principles of fermentation, photosynthesis and microbial metabolism to remediate wastewater, producing a good quality effluent with reuse potential. In addition to the treatment of wastewater, IAPS have the ability to generate two additional product streams viz. biogas and biomass. The latter adds to the attractiveness of the system. However, the implementation of this technology, like many passive systems, has remained limited at a commercial scale, and the inclination is still towards grey technologies. The aim of this research was to investigate the capabilities and potential of a demonstration-scale IAPS and use results obtained to establish a process audit framework. The aspects considered for the audit included performance efficiency, effluent water quality, biomass composition, quantity and productivity within the ponds, and cost analysis of operation and maintenance over a 9-year period. Plant performance was closely monitored during the course of the study and this led to a review of previously adopted plant management strategies. Troubleshooting exercises were also carried out when plant performance declined. Results showed that IAPS efficiently reduced standard water parameters with the exception of pH, dissolved oxygen, and nitrate whose values increased from raw influent to final effluent. The following water quality parameters were established for the final effluent: total suspended solids 55 ± 7.1 mg. L-1 (n = 28); chemical oxygen demand 94.1 ± 10.6 mg. L-1 (n = 28) (after removal of algae); pH 9.9 ± 0.01 (n = 26); ammonium nitrogen 1.7 ± 0.3 mg. L-1 (n = 25); nitrate 3.3 ± 0.6 mg. L-1 (n = 25); ortho-phosphate 1.6 ± 0.2 mg. L-1 (n = 25); electrical conductivity 98.7 ± 2.0 mS m-1 (n = 26) and faecal coliforms (per 100 mL) 1482.6 ± 636.0 (n = 24). The final effluent measured consistently high chemical oxygen demand and total suspended solids, however close analysis showed that total suspended solids could be controlled by increasing the frequency of removal of settled biomass within the settling ponds. Biomass produced contained microalgae, bacteria, metazoa, and protozoa. The biomass productivity achieved was as high as 130.6 kg ha-1 d-1; however, about 33% was lost to the final effluent due to inadequate settling. Results obtained during the course of this study and outcomes of earlier work on IAPS are taken as the baseline to determine parameters needed for the development of the process audit framework. Techniques utilised to derive the blue print process audit protocol for IAPS included a turtle diagram, a flow diagram and a checklist. Attention to plant management proved vital in determining overall performance. Cost, including operating and maintenance, of treating water using the demonstration scale system on a per person equivalent per year basis was determined as ZAR 123.87 (where, ZAR to USD = 0.07).
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  • Date Issued: 2020

Performance, functionalism and form in Ịzọn oral poety

  • Authors: Armstrong, Imomotimi
  • Date: 2020
  • Subjects: Ijo (African people , Ijo language , Folk poetry, Ijo , Folk poetry -- Nigeria
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/140641 , vital:37906
  • Description: Since the publication of Ruth Finnegan’s influential Oral Literature in Africa, way back in 1970, scholars have been paying earnest attention to oral traditions on the African continent. That seminal book pointed out to Africanist scholars the need to urgently collect and document the oral literatures of their various ethnic groups before they die out. However, it is the verbal arts of the major ethnic groups on the continent that very often benefit from this collection and documentation, as it were. Therefore, this study sought to examine the oral poetry of the Ịzọn, a minority ethnic nationality, located in the oil-rich Niger Delta region of Nigeria. The study employed unstructured interviews and participant observations to collect the data for the research. The transcribed and translated data was examined through three eclectic theories to the study of folklore: Russian formalism, performance and functionalism. The study found out that Ịzọn oral poetry is a combination of songs and one person’s praise chants. Moreover, it revealed that praise chanting is a recent practice amongst the Ịzọn that was introduced into Ịzọnland by Chief Adolphus Munamuna from the Yoruba of southwestern Nigeria. Furthermore, the study established that oral poetry plays important roles amongst the people. Besides, it ascertained that the performance of some sub-categories of the poetry is highly dramatic and theatrical. It also discovered that stylistic techniques such as formula, parallelism, proverb, ideophone, praise title, metaphor, repetition, alliteration, assonance, vowel lengthening, amongst others, give the poetry the quality of “literariness.” In addition, the study found out that the poetry, like oral poetry in other ethnic groups, demonstrates the three qualities of change, adaptability and survival. The study has contributed to existing scholarship on African oral traditions in the sense of collecting, documenting and generating awareness on Ịzọn oral poetry, most importantly pointing out the existence of praise chanting amongst a people who had no such culture and the conditions that gave rise to that practice.
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  • Date Issued: 2020

Petits récits: creative perspectives of Chinese encounters in Zambia

  • Authors: Mwaba, Stary
  • Date: 2020
  • Subjects: Personal narratives , Lyotard, Jean-François, 1924-1998 , Art and society -- Zambia , Social practice (Art) -- Zambia , Art and globalization -- Zambia , China -- Relations -- Zambia , Storytelling in art , Colonization in art
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: http://hdl.handle.net/10962/146355 , vital:38518
  • Description: This mini-thesis, which supports my MFA exhibition Black Mountain, articulates on-the- ground creative perspectives of the Zambia-China discourse, through the representation of little narratives - les petits récits - connected to personal experiences. Through my creative production as an artist, I respond to perceptions of the Chinese presence in Africa. I utilize historical and contemporary personal narratives to complicate existing perceptions of Chinese presence in my home context of Zambia. “Petit récits”, or “little narratives”, in Francois Lyotard’s term, refers to personal stories of individuals that subvert dominant master-narratives and their legitimization in social-cultural structure. In the case of China’s presence in Zambia, I refer to the dichotomized narratives in the media as metanarratives which pay little attention to the people on the ground and propose the approach of “little narratives” to foreground the lived experiences of Zambians who have individual encounters with Chinese in various social spaces. By employing the narratives of my family members through installations, paintings, and drawings, I intervene in a broader China-Africa discourse that is often driven by economics and politics, and I attach importance to the little narratives. In my thesis I divide my material into three chapters; each chapter grows out of an encounter with the presence of China (and Chinese people) in Zambia in relation to the very personal narratives of family members - Zoë my daughter, my grandma, and Ngolo my cousin. The first chapter focuses on my work Chinese Cabbage as my entry point to this topic, which is based on a school experiment I did with my daughter Zoë. In this chapter I also discuss the current discourses around China’s presence. Chapter two revisits the Zambian-Chinese historical encounters in memory of my grandma’s insaka stories about the construction of TAZARA Railway, and thus my works discussed in this chapter attach importance to the individual engagements from a historical perspective. Chapter three discusses in particular the controversial issues around Black Mountain and the works inspired by my cousin Ngolo’s stories of mining in Black Mountain and dealing with the Chinese traders.
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  • Date Issued: 2020

Petrographic and geochemical characterisation of the hangingwall and the footwall rocks (the Dipeta and R.A.T. stratigraphic units) to the Kinsevere and Nambulwa copper ore deposits of the Lufilian Arc, southern Democratic Republic of Congo

  • Authors: Nkulu, Robert Kankomba
  • Date: 2020
  • Subjects: Petrogenesis -- Congo (Democratic Republic) , Analytical geochemistry -- Congo (Democratic Republic) , Copper ores -- Congo (Democratic Republic) , Ore deposits -- Congo (Democratic Republic) , Katangan Sequence , Geological mapping -- Congo (Democratic Republic) , Central African Copperbelt (Congo and Zambia) , Lufilian Arc , Neoproterozoic Katangan R.A.T. (Roches Argilo Talqueuse) Subgroup , Dipeta Subgroup
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/142772 , vital:38115
  • Description: The Kinsevere and Nambulwa copper deposits in the Democratic Republic of Congo (D.R.C.) are set in the eastern side of the Neoproterozoic Katanga Supergroup, forming the Lufilian Arc, resulting from a cratonic collision between the Congo and the Kalahari Cratons (ca.620-570_Ma). The Katanga Supergroup was deposited in an extensional rift setting with a sedimentary thickness succession ranging between 7 to 10 km, sub-divided into: − the Roan, the Nguba and the Kundelungu Groups. The stratigraphic column of the Roan Group consists of the R.A.T. (Roche Argilo Talqueuse), the Mines, the Dipeta and the Mwashya Subgroups. Three major deformation phases have been described characterised by complex multiphase tectonics related to a curved superposition of folded, thrust and sheared blocks. The rocks of the R.A.T., Mines and Dipeta Subgroups are recognised as blocks that occur within a stratiform to discordant and diapiritic megabreccia. The blocks were rafted upward with salt tectonics, resulting in the juxtaposition with the hangingwall and the footwall terranes. Therefore, in that context it has been found that the Dipeta may appear overlying the R.A.T. Subgroup through the unconformity decollement surface of heterogeneous breccia. The petrographic observations made of the R.A.T. and Dipeta samples indicates in both units the presence of detrital quartz and feldspar that have been altered and replaced by sericite and muscovite minerals. Gypsum is intimately associated with magnesite, showing an evaporitic environment domain, while magnesite is common as alteration phase both in the R.A.T. and Dipeta Subgroups. Pyrophyllite has been observed in the Dipeta, resulting from reaction of silica with the Kaolinite at low temperature. Accessory detrital minerals include zircon, as well as xenotime intergrown with altered Fe-Ti-oxide hematite, forming complex textures with disseminated Ti-oxides both in R.A.T. and Dipeta units. Major and trace element geochemistry indicates that the Dipeta is more dolomitic and magnesite while the R.A.T. is clay-rich. The Ti2O value of Dipeta and R.A.T samples is relatively low, ranging between 0.36 and 0.69 wt.% respectively, which suggest highly evolved felsic material in the protolith. This is consistent with interpretation based on the Al2O3/TiO2 ratio, which ranges between 18 and 23 for the R.A.T. and Dipeta respectively, indicating an intermediate to felsic granitoids as the protolith of R.A.T. and Dipeta siltstones. The Ti/Zr ratio of R.A.T. and Dipeta samples of less than 10, while, the higher La/Sc ratio of between 2.6 and 5.5 (for the R.A.T. and Dipeta respectively) indicate that both the R.A.T. and Dipeta are active continental and passive margin tectonic setting. Based on the geochemical variation with depth across the R.A.T. and Dipeta and their contact zone, a geochemical fingerprinting suggests that the ratio TiO2/Al2O3 appears to be useful and could be considered as a stratigraphic geochemical maker able to discriminate the R.A.T. and the Dipeta Subgroups during the geological mapping.
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  • Date Issued: 2020

Petrography, metamorphism, deformation and P-T conditions in the western arm of the Lufilian Arc - Zambezi, north-western Zambia

  • Authors: Chilekwa, Mwango
  • Date: 2020
  • Subjects: Petrogenesis -- Zambia -- Zambezi District , Metamorphism (Geology) -- Zambia -- Zambezi District , Petrology -- Zambia -- Zambezi District , Formations (Geology) -- Zambia -- Zambezi District , Rock deformation -- Zambia -- Zambezi District , Lufilian Arc , Neoproterozoic Katangan R.A.T. (Roches Argilo Talqueuse) Subgroup
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/161971 , vital:40699
  • Description: The Zambezi area in north-western Zambia is underlain by Neoproterozoic Katanga Supergroup and older, Archean to Mesoproterozoic Basement Supergroup rocks. The area lies within the Domes Region, which is a structural domain of the Lufilian Arc. The stratigraphic succession within Zambezi area is dominated by the Grand Conglomerate Formation (GC) and Mwashia Group which are the most extensive units, and the less abundant Lower and Upper Roan Groups of the Katanga Supergroup. They wrap around the domal Basement Supergroup units. The mineral assemblage of the Mwashia and the GC schists commonly contains garnet, anthophyllite and biotite. GC rocks show remnants of primary structures such as clasts and sedimentary features. Anthophyllite, garnet and biotite are the dominant Mg-Fe rich metamorphic minerals. However, these are iron rich for each mineral phase and has been attributed to iron rich protoliths. The earliest recognised deformation episode (D1) formed NE-SW S1 foliations within GC which is consistent with the regional structural trend in the western Lufilian Arc. S1 was later affected by D2 that generated downward facing F2 folds and S2 foliations. The other associated feature to D2 is garnet that grew as the result of pro-grade metamorphism. The D3 deformation fabric is not developed and did not affect much of the structural geometry of the Zambezi area. The peak assemblages of the Basement Supergroup and the Katanga Supergroup formed at mid-amphibolite facies conditions of 590 °C and 630 °C at an average pressure of 4.0 kbar. The Basement Supergroup has undergone retrograde metamorphism to greenschist facies condition indicated by presence of chlorite and also determined by biotite-anorthite isopleth in THERIAK DOMINO. At the eastern part of Zambezi area, the Katanga Supergroup rocks were retrogressed in the upper greenschist facies at about ~470°C and ~4.0 kbar due to isobaric cooling.
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  • Date Issued: 2020
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