Compensation for distribution of timing and reference signals over optical fibre networks for telescope arrays
- Authors: Wassin, Shukree
- Date: 2018
- Subjects: Fiber optics , Optical communications Very large array telescopes Optical fiber detectors
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/36425 , vital:33941
- Description: Significant advancements and developments have been made in optical frequency standards, in recent years. In order to verify the accuracy and preciseness of the disseminated RF signal, it is essential to compare its stability with the standards provided in literature as well as by metrology institutes. However, conventional frequency comparison techniques via satellites have extremely inferior stability qualities. As a result, the need for an alternative ultra-high precision RF transfer method presented itself. Highly accurate and precise frequency dissemination across optical fiber has proved a leading contender and a possible solution. When compared to conventional data transfer media, optical fiber has proven to be more superior and yields lower transmission errors and is immune to radio frequency interference. A further quality of optical fibre is that its transmission distance can be extended to greater degree than the traditional coaxial cable due to its low loss property. This thesis deals with the compensation of phase noise in single mode optical fibre. Phase noise degrades the performance and stability of the RF signal as well as the optical carrier frequency across long-haul optical networks. This work begins by experimentally demonstrating a unique and novel way for measuring the round-trip optical fibre latency times. The technique is based on all optical wavelength conversion using a stable PPS injection signal. The result highlighted the importance for active phase error compensation along a fibre link. Various computer simulations were used to study the influence of temperature fluctuation on the optical fibre. The first ever error signals generated at NMU was experimentally demonstrated. Results illustrated that, by minimizing the error voltage the phase difference between the transmitted and reference signals were reduced to zero. Performance analysis testing of the VCSEL phase correction actuator showed that majority of the dither iterations that induced the phase compensation took approximately 0.15 s. Residual frequency instabilities of 3.39791 x 10-12 at 1 s and 8.14848 x 10-12 at 103 s was measured when the 26 km G.655 fibre link was running freely. Experimental results further showed that the relative frequency stabilities measured at 1 s and 103 s were 4.43902 x 10-12 and 1.62055 x 10-13 during active compensation, respectively. The novel work presented in this thesis is exciting since the VCSEL is used as the optical source as well as the phase correction actuator. The benefits of such a device is that is reduces system costs and complexities.
- Full Text:
- Date Issued: 2018
- Authors: Wassin, Shukree
- Date: 2018
- Subjects: Fiber optics , Optical communications Very large array telescopes Optical fiber detectors
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/36425 , vital:33941
- Description: Significant advancements and developments have been made in optical frequency standards, in recent years. In order to verify the accuracy and preciseness of the disseminated RF signal, it is essential to compare its stability with the standards provided in literature as well as by metrology institutes. However, conventional frequency comparison techniques via satellites have extremely inferior stability qualities. As a result, the need for an alternative ultra-high precision RF transfer method presented itself. Highly accurate and precise frequency dissemination across optical fiber has proved a leading contender and a possible solution. When compared to conventional data transfer media, optical fiber has proven to be more superior and yields lower transmission errors and is immune to radio frequency interference. A further quality of optical fibre is that its transmission distance can be extended to greater degree than the traditional coaxial cable due to its low loss property. This thesis deals with the compensation of phase noise in single mode optical fibre. Phase noise degrades the performance and stability of the RF signal as well as the optical carrier frequency across long-haul optical networks. This work begins by experimentally demonstrating a unique and novel way for measuring the round-trip optical fibre latency times. The technique is based on all optical wavelength conversion using a stable PPS injection signal. The result highlighted the importance for active phase error compensation along a fibre link. Various computer simulations were used to study the influence of temperature fluctuation on the optical fibre. The first ever error signals generated at NMU was experimentally demonstrated. Results illustrated that, by minimizing the error voltage the phase difference between the transmitted and reference signals were reduced to zero. Performance analysis testing of the VCSEL phase correction actuator showed that majority of the dither iterations that induced the phase compensation took approximately 0.15 s. Residual frequency instabilities of 3.39791 x 10-12 at 1 s and 8.14848 x 10-12 at 103 s was measured when the 26 km G.655 fibre link was running freely. Experimental results further showed that the relative frequency stabilities measured at 1 s and 103 s were 4.43902 x 10-12 and 1.62055 x 10-13 during active compensation, respectively. The novel work presented in this thesis is exciting since the VCSEL is used as the optical source as well as the phase correction actuator. The benefits of such a device is that is reduces system costs and complexities.
- Full Text:
- Date Issued: 2018
Computational analysis and cavity optimisation to achieve directional solidification in a cast aluminium alloy [Al7SiMg] component
- Authors: Nohanyaza, Melikhaya
- Date: 2018
- Subjects: Metal castings , Automobiles -- Materials , Alloys , Light metal alloys
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/22913 , vital:30141
- Description: The study at hand focussed on A356.0 industrial and high production die casting alloy. Since the birth of metal casting, numerous researchers have addressed the multiple phenomena that influence the casting quality and mechanical properties of castable alloys. This study harnessed research findings on A356.0 alloy and the aluminium family as a whole, to improve the casting soundness of the component already in the production process. The local foundry showed interest in understanding solidification and quality of A356.0 alloy fluxed with NaCl+KCl melt cleaning flux plus 4 of TiB2 5:1 master alloy grain refining rods and A356.0 alloy processed with KCl+Ti (presumably KCl+TiB2) grain refining flux plus 4 of TiB2 5:1 master alloy rods. Numerical analysis was used to define the progressive nature and directional solidification of the alloy using MAGMA5. MAGMA5.3 virtual optimisation capabilities were used for development of future component casting methods and procedures to solve macro- and microporosity evident on the casting. To find a direct link between the virtual and foundry environment, a preliminary study was conducted on a simple foundry stage of cone billet casting for both alloys with and without mould/casting interface coating. The findings indicated that A356.0 maintained its shrinkage volume percentage at mould temperatures above 300 °C, but progressively increased at temperatures below. Furthermore, thermal insulation coat (also used on Right Hand Side [RHS] mould of the foundry component) influenced the shrinkage distribution on the casting while localised at the centre on non-coated mould/casting interfaces for both KCl+Ti and NaCl+KCl melt fluxed A356.0 at similar percentage shrinkage for mould temperatures greater or equal to 300 °C. Near thin foundry castings for both flux treatments indicated similar mechanical properties at similar casting stages. The mechanical properties of both conditions seemed to degrade as a function of die casting period. Secondary dendrite arm spacing microstructure parameter for NaCl+KCl and KCl+Ti fluxed alloy averaged 40 μm and 35 μm respectively across all test zones. However, individual SDAS definitions per test zone indicated possible micro segregation on NaCl+KCl fluxed alloy and instantaneous solidification as a result of constitutional supercooling on alloys fluxed with KCl+Ti alloy. The growth rate solidification parameter was symmetrical about the centre of the component, where the centre of the component experienced an exponential drop from the top (away from the filling gate) to the bottom (near the filling gate) of the component. A virtual approach to tooling geometrical design indicated a weak influence on both micro- and macroporosity. However, the introduction of low thermal capacity, high heat transfer at Left Hand Side [LHS] tooling and a new cooling system arrangement indicated a higher influence in achieving sound casting. Knowledge gained in this study will improve local foundry competitiveness and introduce cost effective virtual approach foundry developments. The study will also introduce new methods for industrial research and position Nelson Mandela University as a leader in this field.
- Full Text:
- Date Issued: 2018
- Authors: Nohanyaza, Melikhaya
- Date: 2018
- Subjects: Metal castings , Automobiles -- Materials , Alloys , Light metal alloys
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/22913 , vital:30141
- Description: The study at hand focussed on A356.0 industrial and high production die casting alloy. Since the birth of metal casting, numerous researchers have addressed the multiple phenomena that influence the casting quality and mechanical properties of castable alloys. This study harnessed research findings on A356.0 alloy and the aluminium family as a whole, to improve the casting soundness of the component already in the production process. The local foundry showed interest in understanding solidification and quality of A356.0 alloy fluxed with NaCl+KCl melt cleaning flux plus 4 of TiB2 5:1 master alloy grain refining rods and A356.0 alloy processed with KCl+Ti (presumably KCl+TiB2) grain refining flux plus 4 of TiB2 5:1 master alloy rods. Numerical analysis was used to define the progressive nature and directional solidification of the alloy using MAGMA5. MAGMA5.3 virtual optimisation capabilities were used for development of future component casting methods and procedures to solve macro- and microporosity evident on the casting. To find a direct link between the virtual and foundry environment, a preliminary study was conducted on a simple foundry stage of cone billet casting for both alloys with and without mould/casting interface coating. The findings indicated that A356.0 maintained its shrinkage volume percentage at mould temperatures above 300 °C, but progressively increased at temperatures below. Furthermore, thermal insulation coat (also used on Right Hand Side [RHS] mould of the foundry component) influenced the shrinkage distribution on the casting while localised at the centre on non-coated mould/casting interfaces for both KCl+Ti and NaCl+KCl melt fluxed A356.0 at similar percentage shrinkage for mould temperatures greater or equal to 300 °C. Near thin foundry castings for both flux treatments indicated similar mechanical properties at similar casting stages. The mechanical properties of both conditions seemed to degrade as a function of die casting period. Secondary dendrite arm spacing microstructure parameter for NaCl+KCl and KCl+Ti fluxed alloy averaged 40 μm and 35 μm respectively across all test zones. However, individual SDAS definitions per test zone indicated possible micro segregation on NaCl+KCl fluxed alloy and instantaneous solidification as a result of constitutional supercooling on alloys fluxed with KCl+Ti alloy. The growth rate solidification parameter was symmetrical about the centre of the component, where the centre of the component experienced an exponential drop from the top (away from the filling gate) to the bottom (near the filling gate) of the component. A virtual approach to tooling geometrical design indicated a weak influence on both micro- and macroporosity. However, the introduction of low thermal capacity, high heat transfer at Left Hand Side [LHS] tooling and a new cooling system arrangement indicated a higher influence in achieving sound casting. Knowledge gained in this study will improve local foundry competitiveness and introduce cost effective virtual approach foundry developments. The study will also introduce new methods for industrial research and position Nelson Mandela University as a leader in this field.
- Full Text:
- Date Issued: 2018
Conflict analysis with a focus on community polarisation: a case study of a wind energy project in Switzerland
- Authors: Bachmann, Melanie
- Date: 2018
- Subjects: Conflict management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/42428 , vital:36654
- Description: Switzerland, like many other countries, wants to expand the production and usage of renewable energies, including wind energy. However, wind energy causes much conflict due to the emissions and possible impacts on the people, nature and landscape. In the canton of Glarus a wind energy project called LinthWind is currently projected. This has resulted in a public dispute involving several parties and members of the community. In opposition to the project, the association LinthGegenWind was formed with the aim of keeping the area free from wind turbines. The project developer, as well as LinthGegenWind, are organising information events and provide information through other platforms. The aim of this research is to provide the community with a thorough understanding of the conflict, including its dynamics and possible destructive processes. Through the conduction of conflict analysis, it investigates the conflict evolving around the project LinthWind. With the help of an online questionnaire, the opinions of the participants regarding the project and also the factors influencing the opinion-formation were enquired. This allowed for an examination of the polarization of the community and the factors contributing to it. The conflict analysis presents detailed information regarding the conflict history and background, the parties involved, issues under contention, sources and causes of the conflict, driving factors and the dynamics. Many factors indicate that the dispute is in an escalating phase. It was further shown that the affected community is clearly polarised regarding the project LinthWind. The polarisation is most likely enhanced by certain measures applied by the parties and the voting process. Independently gathered information by the people themselves seem to be the strongest influencing factors for the opinion formation. The success of the tactics applied by the project developer and the association opposing the project vary regarding their influence on the opinion formation. Missing communication between the parties and a polarised community exacerbates effective conflict management. In the case of LinthWind, a forum is therefore suggested where communication and information – the basics for constructive conflict management – are enabled.
- Full Text:
- Date Issued: 2018
- Authors: Bachmann, Melanie
- Date: 2018
- Subjects: Conflict management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/42428 , vital:36654
- Description: Switzerland, like many other countries, wants to expand the production and usage of renewable energies, including wind energy. However, wind energy causes much conflict due to the emissions and possible impacts on the people, nature and landscape. In the canton of Glarus a wind energy project called LinthWind is currently projected. This has resulted in a public dispute involving several parties and members of the community. In opposition to the project, the association LinthGegenWind was formed with the aim of keeping the area free from wind turbines. The project developer, as well as LinthGegenWind, are organising information events and provide information through other platforms. The aim of this research is to provide the community with a thorough understanding of the conflict, including its dynamics and possible destructive processes. Through the conduction of conflict analysis, it investigates the conflict evolving around the project LinthWind. With the help of an online questionnaire, the opinions of the participants regarding the project and also the factors influencing the opinion-formation were enquired. This allowed for an examination of the polarization of the community and the factors contributing to it. The conflict analysis presents detailed information regarding the conflict history and background, the parties involved, issues under contention, sources and causes of the conflict, driving factors and the dynamics. Many factors indicate that the dispute is in an escalating phase. It was further shown that the affected community is clearly polarised regarding the project LinthWind. The polarisation is most likely enhanced by certain measures applied by the parties and the voting process. Independently gathered information by the people themselves seem to be the strongest influencing factors for the opinion formation. The success of the tactics applied by the project developer and the association opposing the project vary regarding their influence on the opinion formation. Missing communication between the parties and a polarised community exacerbates effective conflict management. In the case of LinthWind, a forum is therefore suggested where communication and information – the basics for constructive conflict management – are enabled.
- Full Text:
- Date Issued: 2018
Conflict narratives of young males in the Blue Crane Route Municipality who experienced domestic violence during childhood
- Authors: Martin, Jonathan Malvin
- Date: 2018
- Subjects: Family violence , Abusive men -- Psychology , Abusive men -- Rehabilitation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/31863 , vital:31855
- Description: Domestic Violence is a growing concern globally and currently one of the most dominant negative social forces in South Africa. Many children are experiencing or witnessing Domestic Violence in their households or community, with potentially devastating consequences (Dawes, Long, Alexander & Ward, 2007; Burton, 2007). This study investigates the personal conflict narratives of eleven young adult males who experienced Domestic Violence as children. The young men completed a self-administered questionnaire which included a request for a personal conflict narrative or story. The study then engaged these young men in a two-day workshop of an international conflict management programme, known as the Alternatives to Violence Project (AVP), which teaches attitudes and strategies to manage conflict (such as self-awareness, empathy and community-building). After the workshop, the participants were asked to re-write their conflict narratives and any changes in their attitudes and strategies to conflict were discussed in group interviews. The study was qualitative; that is, exploratory, descriptive and contextual in nature. Non-probability purposive sampling was employed to identify suitable young adult males between 18-35 years of age from the Blue Crane Route Municipality (Somerset East and Pearston), who experienced Domestic Violence during their childhood. Workers at Victim Support Centres in the Blue Crane Route Municipality assisted with the recruitment of potential participants and requested permission to provide the researcher with their personal information. In analysing the data obtained, the study used a narrative analysis approach to the participants’ pre- and post-AVP workshop conflict narratives. The trustworthiness of the research process and findings was enhanced by employing a variety of data verification strategies.
- Full Text:
- Date Issued: 2018
- Authors: Martin, Jonathan Malvin
- Date: 2018
- Subjects: Family violence , Abusive men -- Psychology , Abusive men -- Rehabilitation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/31863 , vital:31855
- Description: Domestic Violence is a growing concern globally and currently one of the most dominant negative social forces in South Africa. Many children are experiencing or witnessing Domestic Violence in their households or community, with potentially devastating consequences (Dawes, Long, Alexander & Ward, 2007; Burton, 2007). This study investigates the personal conflict narratives of eleven young adult males who experienced Domestic Violence as children. The young men completed a self-administered questionnaire which included a request for a personal conflict narrative or story. The study then engaged these young men in a two-day workshop of an international conflict management programme, known as the Alternatives to Violence Project (AVP), which teaches attitudes and strategies to manage conflict (such as self-awareness, empathy and community-building). After the workshop, the participants were asked to re-write their conflict narratives and any changes in their attitudes and strategies to conflict were discussed in group interviews. The study was qualitative; that is, exploratory, descriptive and contextual in nature. Non-probability purposive sampling was employed to identify suitable young adult males between 18-35 years of age from the Blue Crane Route Municipality (Somerset East and Pearston), who experienced Domestic Violence during their childhood. Workers at Victim Support Centres in the Blue Crane Route Municipality assisted with the recruitment of potential participants and requested permission to provide the researcher with their personal information. In analysing the data obtained, the study used a narrative analysis approach to the participants’ pre- and post-AVP workshop conflict narratives. The trustworthiness of the research process and findings was enhanced by employing a variety of data verification strategies.
- Full Text:
- Date Issued: 2018
Confronting the Colonial Library: teaching Political Studies amidst calls for a decolonised curriculum
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142191 , vital:38057 , DOI: 10.1080/02589346.2018.1418204
- Description: This paper engages with Mudimbe's concept of the ‘colonial library’ with the aim of using this engagement to contribute to current debates about decolonising South African university curricula. The term ‘colonial library’ refers to the body of texts and epistemological order which construct Africa as a symbol of otherness and inferiority. Mudimbe shows that even the most determined attempts to resist the colonial library draw on this same epistemological order. This presents a profound challenge for attempts to decolonise university curricula as it suggests that the colonial library's reach extends into attempts to dismantle it. In response to this challenge, I discuss ways in which we can oppose epistemological ethnocentrism and argue that we need to be open to the possibility of the emancipatory reappropriation of aspects of the colonial library. The paper concludes by relating the foregoing discussion to the South African political studies classroom.
- Full Text:
- Date Issued: 2018
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142191 , vital:38057 , DOI: 10.1080/02589346.2018.1418204
- Description: This paper engages with Mudimbe's concept of the ‘colonial library’ with the aim of using this engagement to contribute to current debates about decolonising South African university curricula. The term ‘colonial library’ refers to the body of texts and epistemological order which construct Africa as a symbol of otherness and inferiority. Mudimbe shows that even the most determined attempts to resist the colonial library draw on this same epistemological order. This presents a profound challenge for attempts to decolonise university curricula as it suggests that the colonial library's reach extends into attempts to dismantle it. In response to this challenge, I discuss ways in which we can oppose epistemological ethnocentrism and argue that we need to be open to the possibility of the emancipatory reappropriation of aspects of the colonial library. The paper concludes by relating the foregoing discussion to the South African political studies classroom.
- Full Text:
- Date Issued: 2018
Conjugation of isoniazid to a zinc phthalocyanine via hydrazone linkage for pH-dependent liposomal controlled release
- Nkanga, Christian I, Krause, Rui W M
- Authors: Nkanga, Christian I , Krause, Rui W M
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/194992 , vital:45517 , xlink:href="https://doi.org/10.1007/s13204-018-0776-y"
- Description: Tuberculosis (TB) remains the leading cause of mortality from infectious diseases. Extended TB treatment and frequent adverse effects, due to poor bioavailability of anti-tubercular drugs (ATBDs), represent the main rationales behind liposomal encapsulation for controlled delivery. Liposomes have been reported as potential vehicles for targeted delivery of ATBDs due to their rapid uptake by macrophages, which are known as the main host cells for TB causative agent (Mycobacterium tuberculosis). Additionally, the need for controlled release of ATBDs arises because leakage is part of the key liposome challenges for hydrophilic compounds like isoniazid (INH). In this study, INH was conjugated to a highly hydrophobic photosensitizer, zinc (II) phthalocyanine (PC), through hydrazone bonding. The obtained conjugate (PC–INH) was encapsulated in liposomes by film hydration method. PC–INH loaded liposomes (PILs) were characterized using dynamic light scattering, transmission electron microscopy, energy-dispersive X-ray spectrometry and UV–Vis absorption spectrometry, which was used also for estimation of encapsulation efficiency (î). INH release was evaluated in different pH media using dialysis. Particle size, zeta potential and î of PILs were about 506 nm, − 55 mV and 72%, respectively. Over 12 h, PILs exhibited 22, 41, 97 and 100% of INH, respectively, released in pH 7.4, 6.4, 5.4 and 4.4 media. This pH-dependent behavior is attractive for site-specific delivery. These findings suggest the conjugation of chemotherapeutics to phthalocyanines using pH-labile linkages as a potential strategy for liposomal controlled release.
- Full Text:
- Date Issued: 2018
- Authors: Nkanga, Christian I , Krause, Rui W M
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/194992 , vital:45517 , xlink:href="https://doi.org/10.1007/s13204-018-0776-y"
- Description: Tuberculosis (TB) remains the leading cause of mortality from infectious diseases. Extended TB treatment and frequent adverse effects, due to poor bioavailability of anti-tubercular drugs (ATBDs), represent the main rationales behind liposomal encapsulation for controlled delivery. Liposomes have been reported as potential vehicles for targeted delivery of ATBDs due to their rapid uptake by macrophages, which are known as the main host cells for TB causative agent (Mycobacterium tuberculosis). Additionally, the need for controlled release of ATBDs arises because leakage is part of the key liposome challenges for hydrophilic compounds like isoniazid (INH). In this study, INH was conjugated to a highly hydrophobic photosensitizer, zinc (II) phthalocyanine (PC), through hydrazone bonding. The obtained conjugate (PC–INH) was encapsulated in liposomes by film hydration method. PC–INH loaded liposomes (PILs) were characterized using dynamic light scattering, transmission electron microscopy, energy-dispersive X-ray spectrometry and UV–Vis absorption spectrometry, which was used also for estimation of encapsulation efficiency (î). INH release was evaluated in different pH media using dialysis. Particle size, zeta potential and î of PILs were about 506 nm, − 55 mV and 72%, respectively. Over 12 h, PILs exhibited 22, 41, 97 and 100% of INH, respectively, released in pH 7.4, 6.4, 5.4 and 4.4 media. This pH-dependent behavior is attractive for site-specific delivery. These findings suggest the conjugation of chemotherapeutics to phthalocyanines using pH-labile linkages as a potential strategy for liposomal controlled release.
- Full Text:
- Date Issued: 2018
Connecting with home, keeping in touch: physical and virtual mobility across stretched families in sub-Saharan Africa
- Porter, Gina, Hampshire, Kate, Abane, Albert, Munthali, Alister, Robson, Elsbeth, Tanle, Augustine, Owusu, Samuel, de Lannoy , Ariane, Bango , Andisiwe
- Authors: Porter, Gina , Hampshire, Kate , Abane, Albert , Munthali, Alister , Robson, Elsbeth , Tanle, Augustine , Owusu, Samuel , de Lannoy , Ariane , Bango , Andisiwe
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/5240 , vital:44414 , https://www.cambridge.org/core/journals/africa/article/connecting-with-home-keeping-in-touch-physical-and-virtual-mobility-across-stretched-families-in-subsaharan-africa/937D8F364AEC4397912B1F0BD9A26285
- Description: There is a long history of migration among low-income families in sub-SaharanAfrica, in which (usually young, often male) members leave home to seek theirfortune in what are perceived to be more favourable locations. While the physicaland virtual mobility practices of such stretched families are often complex andcontingent, maintaining contact with distantly located close kin is frequently ofcrucial importance for the maintenance of emotional (and possibly material)well-being, both for those who have left home and for those who remain. Thisarticle explores the ways in which these connections are being reshaped by increas-ing access to mobile phones in three sub-Saharan countries–Ghana, Malawi andSouth Africa–drawing on interdisciplinary, mixed-methods research fromtwenty-four sites, ranging from poor urban neighbourhoods to remote ruralhamlets. Stories collected from both ends of stretched families present a worldin which the connectivities now offered by the mobile phone bring a differentkind of closeness and knowing, as instant sociality introduces a potential substi-tute for letters, cassettes and face-to-face visits, while the rapid resource mobiliza-tion opportunities identified by those still at home impose increasing pressures onmigrant kin
- Full Text:
- Date Issued: 2018
- Authors: Porter, Gina , Hampshire, Kate , Abane, Albert , Munthali, Alister , Robson, Elsbeth , Tanle, Augustine , Owusu, Samuel , de Lannoy , Ariane , Bango , Andisiwe
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/5240 , vital:44414 , https://www.cambridge.org/core/journals/africa/article/connecting-with-home-keeping-in-touch-physical-and-virtual-mobility-across-stretched-families-in-subsaharan-africa/937D8F364AEC4397912B1F0BD9A26285
- Description: There is a long history of migration among low-income families in sub-SaharanAfrica, in which (usually young, often male) members leave home to seek theirfortune in what are perceived to be more favourable locations. While the physicaland virtual mobility practices of such stretched families are often complex andcontingent, maintaining contact with distantly located close kin is frequently ofcrucial importance for the maintenance of emotional (and possibly material)well-being, both for those who have left home and for those who remain. Thisarticle explores the ways in which these connections are being reshaped by increas-ing access to mobile phones in three sub-Saharan countries–Ghana, Malawi andSouth Africa–drawing on interdisciplinary, mixed-methods research fromtwenty-four sites, ranging from poor urban neighbourhoods to remote ruralhamlets. Stories collected from both ends of stretched families present a worldin which the connectivities now offered by the mobile phone bring a differentkind of closeness and knowing, as instant sociality introduces a potential substi-tute for letters, cassettes and face-to-face visits, while the rapid resource mobiliza-tion opportunities identified by those still at home impose increasing pressures onmigrant kin
- Full Text:
- Date Issued: 2018
Conservation and human livelihoods at the crossroads: Local needs and knowledge in the management of Arabuko Sokoke Forest
- Chiawo, David O, Kombe, Wellington N, Craig, Adrian J F K
- Authors: Chiawo, David O , Kombe, Wellington N , Craig, Adrian J F K
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448843 , vital:74765 , https://doi.org/10.1111/aje.12462
- Description: Arabuko Sokoke Forest is the largest remaining single block of indigenous dry coastal tropical forest in Eastern Africa. Households within a 5 km buffer zone depend heavily on the forest for their livelihood needs, and the pressure on forest resources is on the increase. In May 2015, 109 households were interviewed on resources they obtain from the forest, in terms of the self‐reported level of monthly income. We found household income and farm size significantly positively correlated with benefits from the forest, highlighting the possible influence of household wealth in exploiting forest resources. A large proportion of households (32%) had limited knowledge of local birds, while human–bird conflict was reported by 44% of the households. While many households were keen to participate in conservation projects that maintain the forest, 44% had no knowledge of the forest management plan, and 60% of those interviewed had no idea of how forest zones were designated for particular activities. Drivers for local community participation in conservation projects appear to be sustainable income and fulfilment of basic household needs.
- Full Text:
- Date Issued: 2018
- Authors: Chiawo, David O , Kombe, Wellington N , Craig, Adrian J F K
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448843 , vital:74765 , https://doi.org/10.1111/aje.12462
- Description: Arabuko Sokoke Forest is the largest remaining single block of indigenous dry coastal tropical forest in Eastern Africa. Households within a 5 km buffer zone depend heavily on the forest for their livelihood needs, and the pressure on forest resources is on the increase. In May 2015, 109 households were interviewed on resources they obtain from the forest, in terms of the self‐reported level of monthly income. We found household income and farm size significantly positively correlated with benefits from the forest, highlighting the possible influence of household wealth in exploiting forest resources. A large proportion of households (32%) had limited knowledge of local birds, while human–bird conflict was reported by 44% of the households. While many households were keen to participate in conservation projects that maintain the forest, 44% had no knowledge of the forest management plan, and 60% of those interviewed had no idea of how forest zones were designated for particular activities. Drivers for local community participation in conservation projects appear to be sustainable income and fulfilment of basic household needs.
- Full Text:
- Date Issued: 2018
Constitutional and human-rights aspects of marine spatial planning
- Authors: Chasakara, Rachael Sharon
- Date: 2018
- Subjects: Human rights , Marine resources development -- Law and legislation Law of the sea
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/23470 , vital:30566
- Description: The importance of oceans cannot be overstated as they are vital for the environmental and economic well-being of South Africa. The state of South Africa’s ocean is on the decline due to increased human activities within its waters, which have caused devastation among marine resources that are limited in space, time and amount. These activities have caused elevated competition among ocean users resulting in undesirable effects such as loss of biodiversity. The challenge is not that these human activities are unregulated or unplanned, rather that there are planned and regulated on a sectoral basis by different sectors each with its own specific approach to the allocation and use of the ocean space. There is, therefore, a need for a holistic approach to ocean governance that views the ocean as a whole and not merely on a sectoral basis. The relatively new notion of Marine Spatial Planning (MSP) which establishes its authority in MSP instruments,1 has emerged as a comprehensive way to achieve this. This dissertation grapples with the questions surrounding whether the MSP instruments are consistent with the Constitution of the Republic of South Africa, 1996 (the Constitution). The dissertation departs by providing a background into the spatial jurisdiction of coastal states in the ocean space to clarify how far at sea South Africa can exercise its authority. This study concluded that even though the area of application claimed by the MSP Bill is consistent with the internationally prescribed territory of coastal states at sea, the MSP Bill should expressly state the different sovereign rights vested in coastal states by the United Nations Convention on the Law of the Sea, 1982 (‘the LOSC’) subject to the rights of other states in these waters. From here, the dissertation ventures into an analysis of which organs of state will be responsible for the development and implementation of MSP since it is an exercise of public power by the state. This part of the discussion involves inter alia an in-depth analysis of the separation of powers doctrine as far as planning matters are concerned. An essential premise is that MSP regulation requires all spheres of government to cooperate with each other. It is proposed that the MSP Bill should 1 The MSP Bill, GN 347 in GG 39847 of 2016-03-24 and the National MSP Framework for South Africa, GN 936 in GG 40219 of 2016-08-19. provide how these spheres of government should work together for the successful implementation of MSP. This dissertation then proceeds to discuss the right to equality, the environmental right, and the right to freedom of trade, occupation and profession which could potentially be impacted by the implementation of MSP. It is submitted that in the implementation of MSP, the goal must be to achieve an appropriate balance amongst these competing rights. Finally, considering the above analysis and discussions this dissertation moves to propose recommendations on how the MSP instruments can be amended to give effect to the requirements of these rights. Generally, the findings of this research reflect the consistency of the MSP instruments with the Constitution. However, for MSP to be implemented constitutionally, the proposed recommendations must be adhered to.
- Full Text:
- Date Issued: 2018
- Authors: Chasakara, Rachael Sharon
- Date: 2018
- Subjects: Human rights , Marine resources development -- Law and legislation Law of the sea
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/23470 , vital:30566
- Description: The importance of oceans cannot be overstated as they are vital for the environmental and economic well-being of South Africa. The state of South Africa’s ocean is on the decline due to increased human activities within its waters, which have caused devastation among marine resources that are limited in space, time and amount. These activities have caused elevated competition among ocean users resulting in undesirable effects such as loss of biodiversity. The challenge is not that these human activities are unregulated or unplanned, rather that there are planned and regulated on a sectoral basis by different sectors each with its own specific approach to the allocation and use of the ocean space. There is, therefore, a need for a holistic approach to ocean governance that views the ocean as a whole and not merely on a sectoral basis. The relatively new notion of Marine Spatial Planning (MSP) which establishes its authority in MSP instruments,1 has emerged as a comprehensive way to achieve this. This dissertation grapples with the questions surrounding whether the MSP instruments are consistent with the Constitution of the Republic of South Africa, 1996 (the Constitution). The dissertation departs by providing a background into the spatial jurisdiction of coastal states in the ocean space to clarify how far at sea South Africa can exercise its authority. This study concluded that even though the area of application claimed by the MSP Bill is consistent with the internationally prescribed territory of coastal states at sea, the MSP Bill should expressly state the different sovereign rights vested in coastal states by the United Nations Convention on the Law of the Sea, 1982 (‘the LOSC’) subject to the rights of other states in these waters. From here, the dissertation ventures into an analysis of which organs of state will be responsible for the development and implementation of MSP since it is an exercise of public power by the state. This part of the discussion involves inter alia an in-depth analysis of the separation of powers doctrine as far as planning matters are concerned. An essential premise is that MSP regulation requires all spheres of government to cooperate with each other. It is proposed that the MSP Bill should 1 The MSP Bill, GN 347 in GG 39847 of 2016-03-24 and the National MSP Framework for South Africa, GN 936 in GG 40219 of 2016-08-19. provide how these spheres of government should work together for the successful implementation of MSP. This dissertation then proceeds to discuss the right to equality, the environmental right, and the right to freedom of trade, occupation and profession which could potentially be impacted by the implementation of MSP. It is submitted that in the implementation of MSP, the goal must be to achieve an appropriate balance amongst these competing rights. Finally, considering the above analysis and discussions this dissertation moves to propose recommendations on how the MSP instruments can be amended to give effect to the requirements of these rights. Generally, the findings of this research reflect the consistency of the MSP instruments with the Constitution. However, for MSP to be implemented constitutionally, the proposed recommendations must be adhered to.
- Full Text:
- Date Issued: 2018
Constructing an EMF radiation Hygeia framework and model to demonstrate a public interest override
- Authors: Lech, James Chrystopher
- Date: 2018
- Subjects: Electromagnetic fields , Electromagnetic fields -- Health aspects , Electromagnetic fields -- Measurement , Public interest , Radiation -- Measurement , HYGEIA , Promotion of Access to Information Act (PAIA)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/58695 , vital:27364
- Description: Scientific views on EMF radiation dosimetry and models increasingly suggest that even a tiny increase in the incidence of diseases resulting from exposure to EMF radiation could have broad¹ implications for public health, social accounting and the economy. In South Africa (SA) there is no national EMF radiation exposure protection standard, statutory monitoring or regulations. Multinational High Court deliberations indicate the need for public interest EMF radiation exposure protection standards in South Africa. Domestic citizens, academics, as well as regulatory and legislative practitioners, are unable to effectively monitor and investigate EMF radiation exposure emissions from infrastructure sources, because industries refuse to provide the required data. Industries have, since 2003, continually obstructed access to the data and the establishment of a national EMF radiation standard, citing that it would be in conflict with their strategic economic interests. The demonstration of a public interest override (PIO) function is legislatively required to gain access to the required data. This study constructed (1) a framework and (2) a model to perform test simulations against the (3) PIO criteria to demonstrate a PIO function and tested one PIO simulation scenario. Testing the PIO scenario firstly required the construction of a public interest framework, drawing input from multiple disciplines. The framework literature review used systematic case law and scientific-technical analysis whilst the framework science sought to understand the connections, feedbacks, and trajectories that occur as a result of natural and human system processes and exchanges. The EMF radiation exposure system functions to support human wellbeing needs and to explore the benefits and losses associated with alternative futures with the goal to uncover the current and future limits thereof. In the second instance a HYGEIA² model was selected as a base investigation and forecast simulation tool. The study had to uncover the key attributes and parameters necessary to construct and to run successful EMF radiation exposure simulations. Thereafter the HYGEIA model was modified to specifically identify and evaluate EMF radiation exposure hazard conditions. Through subsequent simulation runs, the constructed framework was then tested. Requested anthroposphere information was synthesized within a systems model to forecast ecosystem services and human-use dynamics under alternative scenarios. The simulation used the model, the model references and the framework for guidelines, thus allowing multiple simulation / demonstration runs for different contexts or scenarios. The third step was the construction of a PIO checklist which guides criteria testing and provides a means of gaining pertinent information for further studies, based on this dissertation. Framework EMF radiation policy inputs into the model were intersected with identified vulnerable area facilities which were selected based on international criteria. The research output revealed potential EMF radiation violations which served as system feedback inputs in support of a demonstrated PIO function. The research recommends that the identified EMF radiation exposure violations of public health undergo a Promotion of Access to Information Act (PAIA) judicial review process to confirm the research findings. The judicial qualification of a PAIA PIO function of ‘substances released into the environment’ and ‘public safety or environmental risk’ would enable access to EMF radiation emissions data essential to future studies.
- Full Text:
- Date Issued: 2018
- Authors: Lech, James Chrystopher
- Date: 2018
- Subjects: Electromagnetic fields , Electromagnetic fields -- Health aspects , Electromagnetic fields -- Measurement , Public interest , Radiation -- Measurement , HYGEIA , Promotion of Access to Information Act (PAIA)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/58695 , vital:27364
- Description: Scientific views on EMF radiation dosimetry and models increasingly suggest that even a tiny increase in the incidence of diseases resulting from exposure to EMF radiation could have broad¹ implications for public health, social accounting and the economy. In South Africa (SA) there is no national EMF radiation exposure protection standard, statutory monitoring or regulations. Multinational High Court deliberations indicate the need for public interest EMF radiation exposure protection standards in South Africa. Domestic citizens, academics, as well as regulatory and legislative practitioners, are unable to effectively monitor and investigate EMF radiation exposure emissions from infrastructure sources, because industries refuse to provide the required data. Industries have, since 2003, continually obstructed access to the data and the establishment of a national EMF radiation standard, citing that it would be in conflict with their strategic economic interests. The demonstration of a public interest override (PIO) function is legislatively required to gain access to the required data. This study constructed (1) a framework and (2) a model to perform test simulations against the (3) PIO criteria to demonstrate a PIO function and tested one PIO simulation scenario. Testing the PIO scenario firstly required the construction of a public interest framework, drawing input from multiple disciplines. The framework literature review used systematic case law and scientific-technical analysis whilst the framework science sought to understand the connections, feedbacks, and trajectories that occur as a result of natural and human system processes and exchanges. The EMF radiation exposure system functions to support human wellbeing needs and to explore the benefits and losses associated with alternative futures with the goal to uncover the current and future limits thereof. In the second instance a HYGEIA² model was selected as a base investigation and forecast simulation tool. The study had to uncover the key attributes and parameters necessary to construct and to run successful EMF radiation exposure simulations. Thereafter the HYGEIA model was modified to specifically identify and evaluate EMF radiation exposure hazard conditions. Through subsequent simulation runs, the constructed framework was then tested. Requested anthroposphere information was synthesized within a systems model to forecast ecosystem services and human-use dynamics under alternative scenarios. The simulation used the model, the model references and the framework for guidelines, thus allowing multiple simulation / demonstration runs for different contexts or scenarios. The third step was the construction of a PIO checklist which guides criteria testing and provides a means of gaining pertinent information for further studies, based on this dissertation. Framework EMF radiation policy inputs into the model were intersected with identified vulnerable area facilities which were selected based on international criteria. The research output revealed potential EMF radiation violations which served as system feedback inputs in support of a demonstrated PIO function. The research recommends that the identified EMF radiation exposure violations of public health undergo a Promotion of Access to Information Act (PAIA) judicial review process to confirm the research findings. The judicial qualification of a PAIA PIO function of ‘substances released into the environment’ and ‘public safety or environmental risk’ would enable access to EMF radiation emissions data essential to future studies.
- Full Text:
- Date Issued: 2018
Construction company joint ventures in South Africa
- Authors: Sisilana, Owethu
- Date: 2018
- Subjects: Construction industry -- South Africa , Joint ventures Strategic alliances (Business) Project management
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/35554 , vital:33756
- Description: In the construction industry, construction joint ventures (CJVs) have become one of the major organisational forms utilised in large-scale projects. However, because of the complexity of CJVs, the management of CJVs is much more difficult than that of usual projects undertaken by a single construction firm. In South Africa the existence of a clear and effective strategy for the successful transformation of organisational culture in a CJV is not clear. Similarly, poorly organised administrative structures in a CJV can also be a barrier to organisational performance. In South Africa there seems to be no evidence of a common understanding on the CJV formation process. According to CIDB (2004) there is no standard CJV agreement document. Therefore, a need arises to establish guidelines on the formation of a CJV agreement. Secondly, there is a need to establish strategies for the successful transformation of organisational culture in CJV. The research obtains an inside view with contractors who have participated in CJV’s, therefore, utilising the qualitative research method. The choice of data collection method was semi-structured one-on-one face to face interviews. In deriving the findings of the research, the ATLAS.ti software was used throughout the research process to manage both the secondary and primary data. The main factors which cause major problems in CJV's is the preliminary agreement, the partner selection and cultural differences. There is no evidence of a collective understanding among CJV partners regarding the successful formation processes of a CJV. The concept that the industry needs a standardised CJV agreement has been welcomed by the participants, the existence of a common CJV agreement would certainly resolve many problems in the way things are done currently including the implementation of joint venture projects. There is consensus between all participants that there is no standard CJV agreement in use in the South African construction industry and exploring a common approach is an idea that is viewed reasonable and to be one of the practical solutions to the problems in the industry. There are several limitations in this study. First, the sample included emerging and established contractors who are currently registered with the CIDB under Contractor Development Program only. While the sample size is relatively small, the researcher was cautious when interpreting the results. Secondly the targeted population for this research was selected using a sample of convenience method as opposed to a random sample, then the results of the study cannot be generally applied to a larger population. Thirdly, an obvious weakness of the research is the methodological difficulties related to qualitative research which relies on the inferences that are made by the researcher based on their own understanding of the data collected. It is therefore crucial that the data gathered is credible and that the findings represent the truth and actual sentiments as they appear from the data collection process. The research is of importance to managers and supervisors of construction companies of all sizes. The findings of this study will assist in ensuring that CJV are efficiently managed irrespective of the cultural differences.
- Full Text:
- Date Issued: 2018
- Authors: Sisilana, Owethu
- Date: 2018
- Subjects: Construction industry -- South Africa , Joint ventures Strategic alliances (Business) Project management
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/35554 , vital:33756
- Description: In the construction industry, construction joint ventures (CJVs) have become one of the major organisational forms utilised in large-scale projects. However, because of the complexity of CJVs, the management of CJVs is much more difficult than that of usual projects undertaken by a single construction firm. In South Africa the existence of a clear and effective strategy for the successful transformation of organisational culture in a CJV is not clear. Similarly, poorly organised administrative structures in a CJV can also be a barrier to organisational performance. In South Africa there seems to be no evidence of a common understanding on the CJV formation process. According to CIDB (2004) there is no standard CJV agreement document. Therefore, a need arises to establish guidelines on the formation of a CJV agreement. Secondly, there is a need to establish strategies for the successful transformation of organisational culture in CJV. The research obtains an inside view with contractors who have participated in CJV’s, therefore, utilising the qualitative research method. The choice of data collection method was semi-structured one-on-one face to face interviews. In deriving the findings of the research, the ATLAS.ti software was used throughout the research process to manage both the secondary and primary data. The main factors which cause major problems in CJV's is the preliminary agreement, the partner selection and cultural differences. There is no evidence of a collective understanding among CJV partners regarding the successful formation processes of a CJV. The concept that the industry needs a standardised CJV agreement has been welcomed by the participants, the existence of a common CJV agreement would certainly resolve many problems in the way things are done currently including the implementation of joint venture projects. There is consensus between all participants that there is no standard CJV agreement in use in the South African construction industry and exploring a common approach is an idea that is viewed reasonable and to be one of the practical solutions to the problems in the industry. There are several limitations in this study. First, the sample included emerging and established contractors who are currently registered with the CIDB under Contractor Development Program only. While the sample size is relatively small, the researcher was cautious when interpreting the results. Secondly the targeted population for this research was selected using a sample of convenience method as opposed to a random sample, then the results of the study cannot be generally applied to a larger population. Thirdly, an obvious weakness of the research is the methodological difficulties related to qualitative research which relies on the inferences that are made by the researcher based on their own understanding of the data collected. It is therefore crucial that the data gathered is credible and that the findings represent the truth and actual sentiments as they appear from the data collection process. The research is of importance to managers and supervisors of construction companies of all sizes. The findings of this study will assist in ensuring that CJV are efficiently managed irrespective of the cultural differences.
- Full Text:
- Date Issued: 2018
Construction management’s perceptions of health and safety
- Authors: Sigama, Takalani
- Date: 2018
- Subjects: Construction industry -- Management , Building -- Safety measures Construction industry -- Health aspects Construction industry -- Safety regulations
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/35713 , vital:33784
- Description: Projects in the construction sector are reputed for poor health and safety (H&S) performance, compared to other industries. This can be attributed to, inter alia, a relatively uncontrolled working environment, inherent operational risks, workers' behaviour in relation to H&S commitment, cultural and religious beliefs, and uncertainties inherent in projects. Hazards and risk arising from poor H&S practices result in injuries, and in some cases, fatalities. The aim of this study is to explore the perceptions of construction management regarding H&S on construction sites. This study investigates the relationship between behaviours, attitudes, perceptions, and behaviours towards H&S, and compares cultural divergences among levels of construction personnel, namely construction management, construction supervision, construction H&S personnel, and H&S representatives. The construction industry has for many years developed and maintained a very bad reputation for coping with project cost, H&S, quality, and schedule. The industry often delivers projects late, and contributes to a disproportionate rate of work-related injuries, and fatalities. Project H&S management is acknowledged as one of the techniques that could be improved on construction projects to enhance performance of construction contractors in South Africa. To answer the research question: ‘Why construction management perceive H&S as a hindrance to production?” the mixed-method research approach was used. An indepth literature review with respect to project H&S was carried out, followed by qualitative and quantitative empirical research. The study established the need for H&S training and awareness of Construction Managers, Construction Supervisors, Construction Health and Safety Managers (CHSMs), Officers (CHSOs), and H&S Representatives. The study recommends that an H&S training needs analysis is critical for all employees, since it raises H&S awareness among all stakeholders in the construction industry, and enables the development of training plans, thereby supporting the reduction of accidents and related incident.
- Full Text:
- Date Issued: 2018
- Authors: Sigama, Takalani
- Date: 2018
- Subjects: Construction industry -- Management , Building -- Safety measures Construction industry -- Health aspects Construction industry -- Safety regulations
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/35713 , vital:33784
- Description: Projects in the construction sector are reputed for poor health and safety (H&S) performance, compared to other industries. This can be attributed to, inter alia, a relatively uncontrolled working environment, inherent operational risks, workers' behaviour in relation to H&S commitment, cultural and religious beliefs, and uncertainties inherent in projects. Hazards and risk arising from poor H&S practices result in injuries, and in some cases, fatalities. The aim of this study is to explore the perceptions of construction management regarding H&S on construction sites. This study investigates the relationship between behaviours, attitudes, perceptions, and behaviours towards H&S, and compares cultural divergences among levels of construction personnel, namely construction management, construction supervision, construction H&S personnel, and H&S representatives. The construction industry has for many years developed and maintained a very bad reputation for coping with project cost, H&S, quality, and schedule. The industry often delivers projects late, and contributes to a disproportionate rate of work-related injuries, and fatalities. Project H&S management is acknowledged as one of the techniques that could be improved on construction projects to enhance performance of construction contractors in South Africa. To answer the research question: ‘Why construction management perceive H&S as a hindrance to production?” the mixed-method research approach was used. An indepth literature review with respect to project H&S was carried out, followed by qualitative and quantitative empirical research. The study established the need for H&S training and awareness of Construction Managers, Construction Supervisors, Construction Health and Safety Managers (CHSMs), Officers (CHSOs), and H&S Representatives. The study recommends that an H&S training needs analysis is critical for all employees, since it raises H&S awareness among all stakeholders in the construction industry, and enables the development of training plans, thereby supporting the reduction of accidents and related incident.
- Full Text:
- Date Issued: 2018
Contesting Boko Haram: A postcolonial critique of media representation of the ethnoreligious, socio-economic and political conflict in Nigeria
- Authors: Mjekula, Somila
- Date: 2018
- Subjects: Mass media -- Nigeria , Television broadcasting -- Social aspects -- Nigeria Nigeria -- In mass media
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/22780 , vital:30085
- Description: Representative and narrative discourses from international media and academia present an essentialist and misleading idea of African issues, and this misrepresentation has leaked, by association, into a flawed portrayal of the Boko Haram insurgency in Nigeria. That is, just as reductionism, ahistorical attributions, and contradictions tend to occur in writing on African conflicts, this has become the tendency with insufficient attempts to define the identity and explain the actions of Boko Haram. Using a postcolonial critique, this dissertation reveals how news media and scholarly reports often undermine and negate the historical, ethno-religious and ideological nuances of Boko Haram’s identity, as well as the socio-economic and political issues that motivate the actions of the sect. Additionally, the examination of Boko Haram’s origins, influences and ever-evolving identity confronts the contradictions and flaws within the group’s own representation, through its ideology and pragmatism. This multi-fold analysis is done through an initial exploration of Nigeria’s history under British colonial rule and the lasting legacy thereafter, which has been responsible for the contemporary violent conflicts that journalist and scholars tend to reduced to Islamic fundamentalism and terrorism. This is followed by a critical acknowledgement of the complicity of Nigeria’s political leadership in the socio-economic injustices prevalent between the two predominant religious populations of Nigeria’s rich and educated Christian South, and the poor and disadvantaged Muslim North. Critical Discourse Analysis is used as a method to analyse the representation of Boko Haram from three academic journal reports by African scholars and three international print media news reports. This study seeks to contribute to reports/writings on postcolonial interpretations of violence and conflict in African media studies, and to account for the historical and contemporary complexities within African countries and their inhabitants who are often negated by influential libertarian media and trusted analytical-scholarly articles.
- Full Text:
- Date Issued: 2018
- Authors: Mjekula, Somila
- Date: 2018
- Subjects: Mass media -- Nigeria , Television broadcasting -- Social aspects -- Nigeria Nigeria -- In mass media
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/22780 , vital:30085
- Description: Representative and narrative discourses from international media and academia present an essentialist and misleading idea of African issues, and this misrepresentation has leaked, by association, into a flawed portrayal of the Boko Haram insurgency in Nigeria. That is, just as reductionism, ahistorical attributions, and contradictions tend to occur in writing on African conflicts, this has become the tendency with insufficient attempts to define the identity and explain the actions of Boko Haram. Using a postcolonial critique, this dissertation reveals how news media and scholarly reports often undermine and negate the historical, ethno-religious and ideological nuances of Boko Haram’s identity, as well as the socio-economic and political issues that motivate the actions of the sect. Additionally, the examination of Boko Haram’s origins, influences and ever-evolving identity confronts the contradictions and flaws within the group’s own representation, through its ideology and pragmatism. This multi-fold analysis is done through an initial exploration of Nigeria’s history under British colonial rule and the lasting legacy thereafter, which has been responsible for the contemporary violent conflicts that journalist and scholars tend to reduced to Islamic fundamentalism and terrorism. This is followed by a critical acknowledgement of the complicity of Nigeria’s political leadership in the socio-economic injustices prevalent between the two predominant religious populations of Nigeria’s rich and educated Christian South, and the poor and disadvantaged Muslim North. Critical Discourse Analysis is used as a method to analyse the representation of Boko Haram from three academic journal reports by African scholars and three international print media news reports. This study seeks to contribute to reports/writings on postcolonial interpretations of violence and conflict in African media studies, and to account for the historical and contemporary complexities within African countries and their inhabitants who are often negated by influential libertarian media and trusted analytical-scholarly articles.
- Full Text:
- Date Issued: 2018
Contesting sexual violence policies in higher education: the case of Rhodes University
- Macleod, Catriona I, Böhmke, Werner, Barker, Kim, Mavuso, Jabulile M-J J, Chiweshe, Malvern T
- Authors: Macleod, Catriona I , Böhmke, Werner , Barker, Kim , Mavuso, Jabulile M-J J , Chiweshe, Malvern T
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444275 , vital:74212 , xlink:href="https://www.emerald.com/insight/content/doi/10.1108/JACPR-05-2017-0295/full/html"
- Description: – In April 2016, students at Rhodes University brought the institution to a standstill as they protested the University’s sexual violence policies and procedures, as well as the “rape culture” that pervades social structures. In response, a Sexual Violence Task Team (SVTT) was formed in an open, participatory, and transparent process. Members of the University community were invited to comment on drafts of the SVTT document. The purpose of this paper is to outline the contestations – arising from both the establishment of the task team and the inputs from University members to drafts of the document – that surfaced concerning managing sexual violence on campuses and sexual offences policies.
- Full Text:
- Date Issued: 2018
- Authors: Macleod, Catriona I , Böhmke, Werner , Barker, Kim , Mavuso, Jabulile M-J J , Chiweshe, Malvern T
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444275 , vital:74212 , xlink:href="https://www.emerald.com/insight/content/doi/10.1108/JACPR-05-2017-0295/full/html"
- Description: – In April 2016, students at Rhodes University brought the institution to a standstill as they protested the University’s sexual violence policies and procedures, as well as the “rape culture” that pervades social structures. In response, a Sexual Violence Task Team (SVTT) was formed in an open, participatory, and transparent process. Members of the University community were invited to comment on drafts of the SVTT document. The purpose of this paper is to outline the contestations – arising from both the establishment of the task team and the inputs from University members to drafts of the document – that surfaced concerning managing sexual violence on campuses and sexual offences policies.
- Full Text:
- Date Issued: 2018
Contesting the nature of young pregnant and mothering women: Critical healthcare nexus research, ethics committees, and healthcare institutions
- Feltham-King, Tracey, Bomela, Yolisa, Macleod, Catriona I
- Authors: Feltham-King, Tracey , Bomela, Yolisa , Macleod, Catriona I
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/434199 , vital:73038 , ISBN 978-3-319-74720-0 , https://link.springer.com/chapter/10.1007/978-3-319-74721-7_5
- Description: In this chapter we describe how systemic contradictions complicate ethical site entry and data collection in critical research. We present our ethnographic research within South African antenatal and postnatal clinics as an example. Pregnant and mothering young women are subject to diverging views of minors in different state-produced policies and legislation. In addition, we encountered discrepancies between our research aims and assumptions made by the University Ethical Standards Committee, managers, healthcare providers, teenaged participants, and other service users. These complexities have implications for ethical engagement of researchers and call for nuanced means of data collection and analysis. We discuss how critical researchers can mitigate social injustice by questioning entrenched ways of thinking about participants and negotiating the contradictory positionings of self and others.
- Full Text:
- Date Issued: 2018
- Authors: Feltham-King, Tracey , Bomela, Yolisa , Macleod, Catriona I
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/434199 , vital:73038 , ISBN 978-3-319-74720-0 , https://link.springer.com/chapter/10.1007/978-3-319-74721-7_5
- Description: In this chapter we describe how systemic contradictions complicate ethical site entry and data collection in critical research. We present our ethnographic research within South African antenatal and postnatal clinics as an example. Pregnant and mothering young women are subject to diverging views of minors in different state-produced policies and legislation. In addition, we encountered discrepancies between our research aims and assumptions made by the University Ethical Standards Committee, managers, healthcare providers, teenaged participants, and other service users. These complexities have implications for ethical engagement of researchers and call for nuanced means of data collection and analysis. We discuss how critical researchers can mitigate social injustice by questioning entrenched ways of thinking about participants and negotiating the contradictory positionings of self and others.
- Full Text:
- Date Issued: 2018
Contrasting responses in the niches of two coral reef herbivores along a gradient of habitat disturbance in the Spermonde Archipelago, Indonesia
- Plass-Johnson, Jeremiah G, Bednarz, Vanessa N, Hill, Jaclyn M, Jompa, Jamaluddin, Ferse, Sebastian C A, Teichberg, Mirta
- Authors: Plass-Johnson, Jeremiah G , Bednarz, Vanessa N , Hill, Jaclyn M , Jompa, Jamaluddin , Ferse, Sebastian C A , Teichberg, Mirta
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69135 , vital:29398 , hhttps://doi.org/10.3389/fmars.2018.00032
- Description: Habitat modification of coral reefs is becoming increasingly common due to increases in coastal urban populations. Coral reef fish are highly dependent on benthic habitat; however, information on species-specific responses to habitat change, in particular with regard to trophic strategies, remains scarce. This study identifies variation in the trophic niches of two herbivorous coral reef fishes with contrasting trophic strategies, using Stable Isotopes Bayesian Ellipses in R, along a spatial gradient of changing coral reef habitats. In the parrotfish Chlorurus bleekeri, a roving consumer, the range of δ15N and δ13C and their niche area displayed significant relationships with the amount of rubble in the habitat. In contrast, the farming damselfish, Dischistodus prosopotaenia, showed a narrow range of both δ15N and δ13C, displaying little change in niche parameters among sites. This may indicate that parrotfish vary their feeding according to habitat, while the damselfish continue to maintain their turf and invertebrate resources. Assessing isotopic niches may help to better understand the specific trophic responses to change in the environment. Furthermore, the use of isotopic niches underlines the utility of stable isotopes in studying the potential impacts of environmental change on feeding ecology.
- Full Text:
- Date Issued: 2018
- Authors: Plass-Johnson, Jeremiah G , Bednarz, Vanessa N , Hill, Jaclyn M , Jompa, Jamaluddin , Ferse, Sebastian C A , Teichberg, Mirta
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69135 , vital:29398 , hhttps://doi.org/10.3389/fmars.2018.00032
- Description: Habitat modification of coral reefs is becoming increasingly common due to increases in coastal urban populations. Coral reef fish are highly dependent on benthic habitat; however, information on species-specific responses to habitat change, in particular with regard to trophic strategies, remains scarce. This study identifies variation in the trophic niches of two herbivorous coral reef fishes with contrasting trophic strategies, using Stable Isotopes Bayesian Ellipses in R, along a spatial gradient of changing coral reef habitats. In the parrotfish Chlorurus bleekeri, a roving consumer, the range of δ15N and δ13C and their niche area displayed significant relationships with the amount of rubble in the habitat. In contrast, the farming damselfish, Dischistodus prosopotaenia, showed a narrow range of both δ15N and δ13C, displaying little change in niche parameters among sites. This may indicate that parrotfish vary their feeding according to habitat, while the damselfish continue to maintain their turf and invertebrate resources. Assessing isotopic niches may help to better understand the specific trophic responses to change in the environment. Furthermore, the use of isotopic niches underlines the utility of stable isotopes in studying the potential impacts of environmental change on feeding ecology.
- Full Text:
- Date Issued: 2018
Contribution of the wool clip project to beneficiaries in King Sabata Dalindyebo Local Municipality
- Madiba, Nangamso Vuyo Hillary
- Authors: Madiba, Nangamso Vuyo Hillary
- Date: 2018
- Subjects: Economic development -- South Africa -- Eastern Cape , Wool industry -- South Africa -- Eastern Cape Sheep industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30800 , vital:31136
- Description: The focus of the study was on the contribution of the Wool Clip Project to beneficiaries in King Sabata Dalindyebo Local Municipality (KSD LM). KSD LM is predominantly rural and constitutes an integral part of OR Tambo District Municipality which is part of the Eastern Cape Province. The poverty head count in KSD LM was at 14,7% in 2016. The Eastern Cape had the highest percentage of households owning sheep in the country. Approximately 775, 300 sheep were in KSD LM in 2012. This study was located within the local economic development framework. A gap was identified in the yields in terms of national sales of wool which are not commensurate with the portion accounted for in the national flock. The National, Provincial and Local spheres of government intervened resulting in the introduction of the Wool Clip Project as a vehicle to mitigate the challenges encountered with regard to wool production. Through the intervention, it was expected that there should be an improvement in the national sales of wool. The aim of the research was to determine whether the Wool Clip Project has made a contribution to the beneficiaries. This was done through the following objectives: - Determination of whether the project has made a contribution to its intended beneficiaries in terms of its objectives, which are outlined in the Business Plan for the Wool Clip Project (2014). - Determination of whether there has been adequate public participation as dictated by Chapter 4, sections 17 to 22 of the Municipal Systems Act No. 32 of 2000. - Investigation of whether the project has made a meaningful contribution to the relevant communities through the creation of sustainable employment opportunities. v A literature review was done using relevant sources of information and knowledge such as books, journals, policies, research outputs. The aim was to provide a well thought out theoretical framework. The research methodology applied to this study was qualitative, taking into account the nature of the study. Data was collected by conducting semi-structured interviews with ten respondents, who were selected through purposive sampling. The data was then analysed and interpreted using themes and sub-themes. Based on the findings, it was concluding that the project has had a positive effect on the lives of the beneficiaries, even though there is room for improvement. Secondly, it has been established that public participation took place during the introduction of the project as legislated. Thirdly, the project has not contributed to sustainable job creation but there are, however, some benefits that the community has gained from it. Recommendations were made towards improved implementation of the project.
- Full Text:
- Date Issued: 2018
- Authors: Madiba, Nangamso Vuyo Hillary
- Date: 2018
- Subjects: Economic development -- South Africa -- Eastern Cape , Wool industry -- South Africa -- Eastern Cape Sheep industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30800 , vital:31136
- Description: The focus of the study was on the contribution of the Wool Clip Project to beneficiaries in King Sabata Dalindyebo Local Municipality (KSD LM). KSD LM is predominantly rural and constitutes an integral part of OR Tambo District Municipality which is part of the Eastern Cape Province. The poverty head count in KSD LM was at 14,7% in 2016. The Eastern Cape had the highest percentage of households owning sheep in the country. Approximately 775, 300 sheep were in KSD LM in 2012. This study was located within the local economic development framework. A gap was identified in the yields in terms of national sales of wool which are not commensurate with the portion accounted for in the national flock. The National, Provincial and Local spheres of government intervened resulting in the introduction of the Wool Clip Project as a vehicle to mitigate the challenges encountered with regard to wool production. Through the intervention, it was expected that there should be an improvement in the national sales of wool. The aim of the research was to determine whether the Wool Clip Project has made a contribution to the beneficiaries. This was done through the following objectives: - Determination of whether the project has made a contribution to its intended beneficiaries in terms of its objectives, which are outlined in the Business Plan for the Wool Clip Project (2014). - Determination of whether there has been adequate public participation as dictated by Chapter 4, sections 17 to 22 of the Municipal Systems Act No. 32 of 2000. - Investigation of whether the project has made a meaningful contribution to the relevant communities through the creation of sustainable employment opportunities. v A literature review was done using relevant sources of information and knowledge such as books, journals, policies, research outputs. The aim was to provide a well thought out theoretical framework. The research methodology applied to this study was qualitative, taking into account the nature of the study. Data was collected by conducting semi-structured interviews with ten respondents, who were selected through purposive sampling. The data was then analysed and interpreted using themes and sub-themes. Based on the findings, it was concluding that the project has had a positive effect on the lives of the beneficiaries, even though there is room for improvement. Secondly, it has been established that public participation took place during the introduction of the project as legislated. Thirdly, the project has not contributed to sustainable job creation but there are, however, some benefits that the community has gained from it. Recommendations were made towards improved implementation of the project.
- Full Text:
- Date Issued: 2018
Control options for false codling moth, Thaumatotibia leucotreta (Lepidoptera: Tortricidae), in South Africa, with emphasis on the potential use of entomopathogenic nematodes and fungi
- Malan, Antoinette P, von Diest, J I, Moore, Sean D, Addison, Pia
- Authors: Malan, Antoinette P , von Diest, J I , Moore, Sean D , Addison, Pia
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/452219 , vital:75112 , https://hdl.handle.net/10520/EJC-de823b051
- Description: False codling moth (FCM), Thaumatotibia leucotreta (Lepidoptera: Tortricidae) is an important pest of various fruit crops in South Africa. Current FCM control strategies include the use of chemical insecticides. However, FCM has developed resistance to some of the insecticides, and stringent chemical residue restrictions have been imposed by some foreign markets. Thus, the demand for high-quality fruit has translated into a need for new, efficient and effective integrated pest management (IPM) strategies. One such strategy is the control of the soil-dwelling life stages of FCM, using entomopathogenic nematodes (EPNs) and entomopathogenic fungi (EPF). Both of the biocontrol agents concerned have individually been shown to be effective against FCM.
- Full Text:
- Date Issued: 2018
- Authors: Malan, Antoinette P , von Diest, J I , Moore, Sean D , Addison, Pia
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/452219 , vital:75112 , https://hdl.handle.net/10520/EJC-de823b051
- Description: False codling moth (FCM), Thaumatotibia leucotreta (Lepidoptera: Tortricidae) is an important pest of various fruit crops in South Africa. Current FCM control strategies include the use of chemical insecticides. However, FCM has developed resistance to some of the insecticides, and stringent chemical residue restrictions have been imposed by some foreign markets. Thus, the demand for high-quality fruit has translated into a need for new, efficient and effective integrated pest management (IPM) strategies. One such strategy is the control of the soil-dwelling life stages of FCM, using entomopathogenic nematodes (EPNs) and entomopathogenic fungi (EPF). Both of the biocontrol agents concerned have individually been shown to be effective against FCM.
- Full Text:
- Date Issued: 2018
Cooperatives in Mhlontlo Local Municipality, Eastern Cape Province : an examination of the ablers and disablers of grassroots development
- Authors: Mahlasela, Chwayitile
- Date: 2018
- Subjects: Cooperative societies--South Africa--Eastern Cape Rural development--South Africa--Eastern Cape Rural development
- Language: English
- Type: Thesis , Masters , Rural Development
- Identifier: http://hdl.handle.net/10353/16264 , vital:40705
- Description: Scholars and policy makers often see cooperatives as agents of rural economic development. However, experiences have showed that cooperatives in some rural communities have not brought sustainable rural development as levels of poverty and unemployment are still staggeringly high. It is against this background that this study examines the enablers and disablers of cooperatives in Mhlontlo Local Municipality in the Eastern Cape. In order to achieve this aim, the study adopted qualitative research design. Oral interviews and Focus Group Discussions were used to collect qualitative data from the purposively selected participants. Also, official documents on the roles of cooperatives to rural development were used to complement primary sources of data collection. Thematic analytical technique was used to analyse data obtained. The result of the analysis revealed that lack of basic infrastructures, inadequate value addition and inefficient monitoring and evaluation of the programmes have disabled the cooperative societies in Mhlontlo Local Municipality from achieving the goals of rural development. Based on the analysis of data, the study concluded that cooperatives in Mhlontlo Local Municipality are faced with immense challenges, which are hampering their contributions to achieving sustainable rural development in the municipality. Based on this conclusion, the study recommended that in order to improve the efficiency of cooperative societies in terms of achieving rural development, government needs to engage relevant stakeholders such as the local government officials, private sector, community members and the NGOs in the formulation and implementation of strategies to be adopted by the cooperative societies in bringing about sustainable rural development.
- Full Text:
- Date Issued: 2018
- Authors: Mahlasela, Chwayitile
- Date: 2018
- Subjects: Cooperative societies--South Africa--Eastern Cape Rural development--South Africa--Eastern Cape Rural development
- Language: English
- Type: Thesis , Masters , Rural Development
- Identifier: http://hdl.handle.net/10353/16264 , vital:40705
- Description: Scholars and policy makers often see cooperatives as agents of rural economic development. However, experiences have showed that cooperatives in some rural communities have not brought sustainable rural development as levels of poverty and unemployment are still staggeringly high. It is against this background that this study examines the enablers and disablers of cooperatives in Mhlontlo Local Municipality in the Eastern Cape. In order to achieve this aim, the study adopted qualitative research design. Oral interviews and Focus Group Discussions were used to collect qualitative data from the purposively selected participants. Also, official documents on the roles of cooperatives to rural development were used to complement primary sources of data collection. Thematic analytical technique was used to analyse data obtained. The result of the analysis revealed that lack of basic infrastructures, inadequate value addition and inefficient monitoring and evaluation of the programmes have disabled the cooperative societies in Mhlontlo Local Municipality from achieving the goals of rural development. Based on the analysis of data, the study concluded that cooperatives in Mhlontlo Local Municipality are faced with immense challenges, which are hampering their contributions to achieving sustainable rural development in the municipality. Based on this conclusion, the study recommended that in order to improve the efficiency of cooperative societies in terms of achieving rural development, government needs to engage relevant stakeholders such as the local government officials, private sector, community members and the NGOs in the formulation and implementation of strategies to be adopted by the cooperative societies in bringing about sustainable rural development.
- Full Text:
- Date Issued: 2018
Core-modified rubyrins with phenanthrene-fused pyrrole rings
- Yuan, Xuemei, Li, Minzhi, Meng, Ting, Mack, John, Soy, Rodah C, Nyokong, Tebello, Zhu, Weihua, Xu, Haijun, Liang, Xu
- Authors: Yuan, Xuemei , Li, Minzhi , Meng, Ting , Mack, John , Soy, Rodah C , Nyokong, Tebello , Zhu, Weihua , Xu, Haijun , Liang, Xu
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/234568 , vital:50209 , xlink:href="https://doi.org/10.1016/j.dyepig.2018.05.045"
- Description: Three fused-ring-expanded rubyrins with modified macrocyclic core have been synthesized and characterized. A series of spectroscopic, electrochemical measurements and a set of theoretical calculations demonstrate that the core-modification of the inner core of rubyrins has a large influence on the electronic structure. Colorimetric changes are observe that demonstrate that these core-modified rubyrins could be used as selective Hg2+ ion sensors. These properties can be fine-tuned by introducing lipophilic substituents on the meso-aryl rings.
- Full Text:
- Date Issued: 2018
- Authors: Yuan, Xuemei , Li, Minzhi , Meng, Ting , Mack, John , Soy, Rodah C , Nyokong, Tebello , Zhu, Weihua , Xu, Haijun , Liang, Xu
- Date: 2018
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/234568 , vital:50209 , xlink:href="https://doi.org/10.1016/j.dyepig.2018.05.045"
- Description: Three fused-ring-expanded rubyrins with modified macrocyclic core have been synthesized and characterized. A series of spectroscopic, electrochemical measurements and a set of theoretical calculations demonstrate that the core-modification of the inner core of rubyrins has a large influence on the electronic structure. Colorimetric changes are observe that demonstrate that these core-modified rubyrins could be used as selective Hg2+ ion sensors. These properties can be fine-tuned by introducing lipophilic substituents on the meso-aryl rings.
- Full Text:
- Date Issued: 2018