An analysis of the Southern African Development Community (SADC) preventive diplomacy in the kingdom of Lesotho: a case study
- Authors: Bukae, Nkosi Makhonya
- Date: 2012
- Subjects: Southern African Development Community , Diplomatic negotiations in international disputes , Diplomacy , Conflict management -- Lesotho , Africa, Southern -- Politics and government , Lesotho -- Politics and government
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:8196 , http://hdl.handle.net/10948/d1008296 , Southern African Development Community , Diplomatic negotiations in international disputes , Diplomacy , Conflict management -- Lesotho , Africa, Southern -- Politics and government , Lesotho -- Politics and government
- Description: The focus of this study is the Southern African Development Community (SADC) preventive diplomacy interventions in Lesotho in 1994, 1998 and 2007. The core aim of the study was to evaluate the efficacy of the SADC security mechanism (the Organ on Politics, Defence and Security (OPDS) in conflict prevention, management and resolution on the basis of the Lesotho experience. Data for this qualitative case study was collected through interviews and document analysis. The twenty four participants for the study were drawn from the SADC OPDS unit, Lesotho political parties, Civil Society Organisations (CSOs), Academics from the University of Botswana (UB) and the National University of Lesotho (NUL), retired Botswana Defence officers who participated in the Lesotho missions and office of the post-2007election dispute dialogue facilitator in Lesotho. Documents on the SADC Treaties, Protocols, Communiqués and interventions in other set ups were used to highlight its operational policies, mandate, structures, successes and challenges. Lesotho was chosen as a case study because SADC employed both non-coercive (SADC Troika and Eminent Person mediation, 1994 and 2007 respectively) and coercive measures (the 1998 military intervention). The findings of the study revealed that SADC as a regional body had its own successes and challenges. Different perceptions on the SADC interventions in Lesotho emerged mainly between the participants from the ruling party and the opposition parties. While the former commended SADC for successfully mitigating the calamitous effects of 1994, 1998 and 2007 post-electoral violence, the opposition parties viewed the regional organisations as engaged in illegal interference in the domestic affairs of the country to defend the incumbent governing party. It also emerged from the study that the SADC security mechanism has numerous structural and operational flaws. There were several unanswered questions revolving around the legality and mandate of some of the missions. For instance, no concrete evidence emerged as to whether the 1998 military intervention was authorised by the SADC. The study also revealed that SADC has learnt valuable lessons from the Lesotho missions. Some of the reforms which the SADC has introduced in the OPDS such as the establishment of the SADC Stand by Force, Early Warning structures, the Mediation Unit, and a panel of expert mediators emanated mainly from the Lesotho experiences. The study recommends that SADC needs to harmonise the efforts of its OPDS structures such as the Mediation Unit; the Troika; the Inter-State Defence and Security Committee (ISDSC); the Inter-State Politics and Diplomacy Committee (ISPDC) and the Summit of Heads of States and Governments for rapid, coherent and well coordinated interventions in future regional preventive missions. It is also recommended that SADC should focus on identifying and mitigating underlying causal factors such as underdevelopment; poverty; deprivation of freedoms, marginalisation and other forms of social stratifications and oppression in its preventive diplomacy missions if durable peace is to be achieved in Lesotho and any other future cases.
- Full Text:
- Date Issued: 2012
- Authors: Bukae, Nkosi Makhonya
- Date: 2012
- Subjects: Southern African Development Community , Diplomatic negotiations in international disputes , Diplomacy , Conflict management -- Lesotho , Africa, Southern -- Politics and government , Lesotho -- Politics and government
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:8196 , http://hdl.handle.net/10948/d1008296 , Southern African Development Community , Diplomatic negotiations in international disputes , Diplomacy , Conflict management -- Lesotho , Africa, Southern -- Politics and government , Lesotho -- Politics and government
- Description: The focus of this study is the Southern African Development Community (SADC) preventive diplomacy interventions in Lesotho in 1994, 1998 and 2007. The core aim of the study was to evaluate the efficacy of the SADC security mechanism (the Organ on Politics, Defence and Security (OPDS) in conflict prevention, management and resolution on the basis of the Lesotho experience. Data for this qualitative case study was collected through interviews and document analysis. The twenty four participants for the study were drawn from the SADC OPDS unit, Lesotho political parties, Civil Society Organisations (CSOs), Academics from the University of Botswana (UB) and the National University of Lesotho (NUL), retired Botswana Defence officers who participated in the Lesotho missions and office of the post-2007election dispute dialogue facilitator in Lesotho. Documents on the SADC Treaties, Protocols, Communiqués and interventions in other set ups were used to highlight its operational policies, mandate, structures, successes and challenges. Lesotho was chosen as a case study because SADC employed both non-coercive (SADC Troika and Eminent Person mediation, 1994 and 2007 respectively) and coercive measures (the 1998 military intervention). The findings of the study revealed that SADC as a regional body had its own successes and challenges. Different perceptions on the SADC interventions in Lesotho emerged mainly between the participants from the ruling party and the opposition parties. While the former commended SADC for successfully mitigating the calamitous effects of 1994, 1998 and 2007 post-electoral violence, the opposition parties viewed the regional organisations as engaged in illegal interference in the domestic affairs of the country to defend the incumbent governing party. It also emerged from the study that the SADC security mechanism has numerous structural and operational flaws. There were several unanswered questions revolving around the legality and mandate of some of the missions. For instance, no concrete evidence emerged as to whether the 1998 military intervention was authorised by the SADC. The study also revealed that SADC has learnt valuable lessons from the Lesotho missions. Some of the reforms which the SADC has introduced in the OPDS such as the establishment of the SADC Stand by Force, Early Warning structures, the Mediation Unit, and a panel of expert mediators emanated mainly from the Lesotho experiences. The study recommends that SADC needs to harmonise the efforts of its OPDS structures such as the Mediation Unit; the Troika; the Inter-State Defence and Security Committee (ISDSC); the Inter-State Politics and Diplomacy Committee (ISPDC) and the Summit of Heads of States and Governments for rapid, coherent and well coordinated interventions in future regional preventive missions. It is also recommended that SADC should focus on identifying and mitigating underlying causal factors such as underdevelopment; poverty; deprivation of freedoms, marginalisation and other forms of social stratifications and oppression in its preventive diplomacy missions if durable peace is to be achieved in Lesotho and any other future cases.
- Full Text:
- Date Issued: 2012
An archaelogy of South Africanness: the conditions and fantasies of a post-apartheid festival
- Authors: Truscott, Ross
- Date: 2012
- Subjects: Nationalism -- South Africa -- History -- 20th century , Whites -- Race identity -- South Africa , Afrikaner loyalists , Psychoanalysis , Discourse analysis , Multiculturalism -- South Africa
- Language: English
- Type: Thesis , Doctoral , D Soc Sc (Psych)
- Identifier: vital:11610 , http://hdl.handle.net/10353/539 , Nationalism -- South Africa -- History -- 20th century , Whites -- Race identity -- South Africa , Afrikaner loyalists , Psychoanalysis , Discourse analysis , Multiculturalism -- South Africa
- Description: It has become commonplace in academic studies, particularly those with a critical bent, to view nations as being historical constructs, as being without essence, though not without effects of exclusion and inclusion, of the constitution of the „authentic‟ national subject and the „other of the nation.‟ The critical impetus at work here is to show how a nation is constructed in order to bring into view the knowledge and power relations this construction entails, to show whose interests the construction serves, and whose it does not. This study examines the discursive production, the performative enactment and the spatial emplacement of post-apartheid „South Africanness‟ through a case study of Oppikoppi music festival. Oppikoppi is an annual event that emerged in 1994, on the threshold of the „new South Africa.‟ The festival is attended predominantly by young white Afrikaans-speaking South Africans and is held on a farm in the northernmost province of Limpopo, South Africa, an area notoriously conservative in its racial politics. Yet, curiously, Oppikoppi has been repeatedly referred to, and refers to itself with an almost obsessive regularity and repetitiveness, as a „truly South African‟ event. Indeed, the festival has been promoted, since 1998, as „The Home of South African Music,‟ and in 2009 the site of the festival was unofficially declared a „national monument.‟ Through the employment of concepts drawn from the writings of French philosopher and historian, Michel Foucault – particularly his earlier archaeological works – and from Sigmund Freud – particularly his metapsychological works – this study has posed two broad sets of questions. Firstly, from a Foucauldian perspective, what have been the conditions for the production of „South Africanness‟ at this festival? What have been the requirements, the discursive „rules of the game‟ for whiteness and Afrikanerness to become „South African‟? To what extent does this constitution of the festival as a „South African‟ event preserve older lines of division, difference and oppression? To what extent does this bring about meaningful social change? Secondly, from a psychoanalytic perspective, what are the fantasies constellated in the discourse of the festival as a „South African‟ event? Who, in these fantasies, is constituted as the „other of the post-apartheid nation‟? How has fantasy provided a kind of „hallucinatory gratification,‟ a phantasmatic compensation for, and a means of conserving, the losses of privilege in the new nation? And how has fantasy oriented the festival towards post-apartheid sociality, soliciting identifications with the post-apartheid nation? The overarching argument proposed is that anti-apartheid post-apartheid nation building has cultivated a melancholic loss of apartheid for whites in general and Afrikaners in particular, a loss that cannot be grieved – indeed, a loss that should not be grieved – and, as such, a grief that takes on an unconscious afterlife. Apartheid and the life it enabled – not only racialised privilege, but also a structure of identification and idealisation, of being and having – becomes a loss that is buried in, and by, the injunctions issued to post-apartheid memory and conduct. Without the discursive resources with which to symbolise this loss, disguised repetitions of the past, a neurotic refinding of the lost objects of apartheid, and melancholia are the likely outcomes, each of which engender a set of exclusions and enjoyments that run along old and new lines.
- Full Text:
- Date Issued: 2012
- Authors: Truscott, Ross
- Date: 2012
- Subjects: Nationalism -- South Africa -- History -- 20th century , Whites -- Race identity -- South Africa , Afrikaner loyalists , Psychoanalysis , Discourse analysis , Multiculturalism -- South Africa
- Language: English
- Type: Thesis , Doctoral , D Soc Sc (Psych)
- Identifier: vital:11610 , http://hdl.handle.net/10353/539 , Nationalism -- South Africa -- History -- 20th century , Whites -- Race identity -- South Africa , Afrikaner loyalists , Psychoanalysis , Discourse analysis , Multiculturalism -- South Africa
- Description: It has become commonplace in academic studies, particularly those with a critical bent, to view nations as being historical constructs, as being without essence, though not without effects of exclusion and inclusion, of the constitution of the „authentic‟ national subject and the „other of the nation.‟ The critical impetus at work here is to show how a nation is constructed in order to bring into view the knowledge and power relations this construction entails, to show whose interests the construction serves, and whose it does not. This study examines the discursive production, the performative enactment and the spatial emplacement of post-apartheid „South Africanness‟ through a case study of Oppikoppi music festival. Oppikoppi is an annual event that emerged in 1994, on the threshold of the „new South Africa.‟ The festival is attended predominantly by young white Afrikaans-speaking South Africans and is held on a farm in the northernmost province of Limpopo, South Africa, an area notoriously conservative in its racial politics. Yet, curiously, Oppikoppi has been repeatedly referred to, and refers to itself with an almost obsessive regularity and repetitiveness, as a „truly South African‟ event. Indeed, the festival has been promoted, since 1998, as „The Home of South African Music,‟ and in 2009 the site of the festival was unofficially declared a „national monument.‟ Through the employment of concepts drawn from the writings of French philosopher and historian, Michel Foucault – particularly his earlier archaeological works – and from Sigmund Freud – particularly his metapsychological works – this study has posed two broad sets of questions. Firstly, from a Foucauldian perspective, what have been the conditions for the production of „South Africanness‟ at this festival? What have been the requirements, the discursive „rules of the game‟ for whiteness and Afrikanerness to become „South African‟? To what extent does this constitution of the festival as a „South African‟ event preserve older lines of division, difference and oppression? To what extent does this bring about meaningful social change? Secondly, from a psychoanalytic perspective, what are the fantasies constellated in the discourse of the festival as a „South African‟ event? Who, in these fantasies, is constituted as the „other of the post-apartheid nation‟? How has fantasy provided a kind of „hallucinatory gratification,‟ a phantasmatic compensation for, and a means of conserving, the losses of privilege in the new nation? And how has fantasy oriented the festival towards post-apartheid sociality, soliciting identifications with the post-apartheid nation? The overarching argument proposed is that anti-apartheid post-apartheid nation building has cultivated a melancholic loss of apartheid for whites in general and Afrikaners in particular, a loss that cannot be grieved – indeed, a loss that should not be grieved – and, as such, a grief that takes on an unconscious afterlife. Apartheid and the life it enabled – not only racialised privilege, but also a structure of identification and idealisation, of being and having – becomes a loss that is buried in, and by, the injunctions issued to post-apartheid memory and conduct. Without the discursive resources with which to symbolise this loss, disguised repetitions of the past, a neurotic refinding of the lost objects of apartheid, and melancholia are the likely outcomes, each of which engender a set of exclusions and enjoyments that run along old and new lines.
- Full Text:
- Date Issued: 2012
An assessment of the motivational value of rewards among health professionals in Malawi's Ministry of Health
- Chanza, Alfred Witness Dzanja
- Authors: Chanza, Alfred Witness Dzanja
- Date: 2012
- Subjects: Employee motivation -- Malawi , Medical personnel -- Salaries, etc. -- Malawi , Medical personnel -- Job satisfaction -- Malawi , Public health -- Malawi
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9963 , http://hdl.handle.net/10948/d1020330
- Description: The assessment of the motivational value of rewards in the world of work is interesting but difficult to understand. Variations in research reports and inadequate comprehension of the efficiency and motivational value of rewards have brought about confusions, controversies and contradictions among authors, researchers, consultants and practitioners in the field of Industrial and Organisational Psychology (Mangham, 2007; Muula, 2006; Muula & Maseko, 2005; Palmer, 2006; World Bank, 2004). As a consequence, organisations are applying theories and models of motivation selectively depending on their beliefs, ideological framework of values and assumptions (Dzimbiri, 2009). The study was therefore carried out as a positive contribution to the existing knowledge and debate on the motivational value of rewards for health professionals in the public health sectors of the developing countries. Through a systematic sampling method, 571 health professionals were sampled for the study. Data were collected through the use of a self-administered questionnaire which was composed based on the data collected from desk research/literature review, focus group discussions and interviews. The findings of the study revealed that the Malawi‟s Ministry of Health (MoH) is failing to attract, motivate and retain health professionals; there is perception of inequity of the rewards among the health professionals; health professionals develop coping strategies to supplement their monthly financial rewards; health professionals engage in corrupt practices to supplement their monthly financial rewards; and there is erosion of industrial democracy in the Malawi‟s Public Health Sector. While the statistical testing of the hypothesized model proved a lack of fit between the variables, the statistical testing of the re-specified model suggests that there is a positive relationship between financial rewards and reward-related problems being faced by health professionals in the Malawi‟s MoH. Through the Structural Equation Modeling (SEM) exercise, an inverse (negative) relationship between financial and non-financial rewards was deduced, and scientifically and graphically demonstrated. Both the re-specified and graphical models symbolize a pragmatic departure from the theoretical model whose authors (Franco, Bennett, Kanfer & Stubblebine, 2004) are largely inclined to the use of non-financial rewards and suggest that financial rewards should be used with caution. These findings also reject the Herzberg‟s two factor theory (Herzberg, 1960) which claims that financial rewards (salaries) are not a motivator. The major recommendations of the study are that the Franco et al.‟s (2004) model should be adopted and adapted in the Malawi‟s MoH with the view that the value of both financial and non-financial rewards (as motivators) varies from individual to individual due to individual differences and prevailing factors/forces in both the work environment and wider society in which the MoH operates; a hybrid reward system combining the strengths of time-based, performance-based and competence-based reward systems should be developed and implemented; the results of scientifically testing the re-specified model and the inverse (causal) relationship established between financial and non-financial rewards (as demonstrated in a graphic model) should be re-tested with other samples in the public health sectors of the developing countries; and the motivational value of non-financial rewards should be scientifically established and compared with the motivational value of financial rewards used independent of each other in business organisations to make an objective conclusion on the rewards-motivation debate.
- Full Text:
- Date Issued: 2012
- Authors: Chanza, Alfred Witness Dzanja
- Date: 2012
- Subjects: Employee motivation -- Malawi , Medical personnel -- Salaries, etc. -- Malawi , Medical personnel -- Job satisfaction -- Malawi , Public health -- Malawi
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9963 , http://hdl.handle.net/10948/d1020330
- Description: The assessment of the motivational value of rewards in the world of work is interesting but difficult to understand. Variations in research reports and inadequate comprehension of the efficiency and motivational value of rewards have brought about confusions, controversies and contradictions among authors, researchers, consultants and practitioners in the field of Industrial and Organisational Psychology (Mangham, 2007; Muula, 2006; Muula & Maseko, 2005; Palmer, 2006; World Bank, 2004). As a consequence, organisations are applying theories and models of motivation selectively depending on their beliefs, ideological framework of values and assumptions (Dzimbiri, 2009). The study was therefore carried out as a positive contribution to the existing knowledge and debate on the motivational value of rewards for health professionals in the public health sectors of the developing countries. Through a systematic sampling method, 571 health professionals were sampled for the study. Data were collected through the use of a self-administered questionnaire which was composed based on the data collected from desk research/literature review, focus group discussions and interviews. The findings of the study revealed that the Malawi‟s Ministry of Health (MoH) is failing to attract, motivate and retain health professionals; there is perception of inequity of the rewards among the health professionals; health professionals develop coping strategies to supplement their monthly financial rewards; health professionals engage in corrupt practices to supplement their monthly financial rewards; and there is erosion of industrial democracy in the Malawi‟s Public Health Sector. While the statistical testing of the hypothesized model proved a lack of fit between the variables, the statistical testing of the re-specified model suggests that there is a positive relationship between financial rewards and reward-related problems being faced by health professionals in the Malawi‟s MoH. Through the Structural Equation Modeling (SEM) exercise, an inverse (negative) relationship between financial and non-financial rewards was deduced, and scientifically and graphically demonstrated. Both the re-specified and graphical models symbolize a pragmatic departure from the theoretical model whose authors (Franco, Bennett, Kanfer & Stubblebine, 2004) are largely inclined to the use of non-financial rewards and suggest that financial rewards should be used with caution. These findings also reject the Herzberg‟s two factor theory (Herzberg, 1960) which claims that financial rewards (salaries) are not a motivator. The major recommendations of the study are that the Franco et al.‟s (2004) model should be adopted and adapted in the Malawi‟s MoH with the view that the value of both financial and non-financial rewards (as motivators) varies from individual to individual due to individual differences and prevailing factors/forces in both the work environment and wider society in which the MoH operates; a hybrid reward system combining the strengths of time-based, performance-based and competence-based reward systems should be developed and implemented; the results of scientifically testing the re-specified model and the inverse (causal) relationship established between financial and non-financial rewards (as demonstrated in a graphic model) should be re-tested with other samples in the public health sectors of the developing countries; and the motivational value of non-financial rewards should be scientifically established and compared with the motivational value of financial rewards used independent of each other in business organisations to make an objective conclusion on the rewards-motivation debate.
- Full Text:
- Date Issued: 2012
An ecosystem-based spatial conservation plan for the South African sandy beaches
- Authors: Harris, Linda Rozanne
- Date: 2012
- Subjects: Seashore -- South Africa , Bathing beaches -- South Africa , Shorelines -- South Africa , Conservation biology , PhD Thesis
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10688 , http://hdl.handle.net/10948/d1007920 , Seashore -- South Africa , Bathing beaches -- South Africa , Shorelines -- South Africa , Conservation biology
- Description: An ecosytem-based spatial conservation plan for the South African sandy beaches. Sandy beaches are valuable ecosystems. They support a collection of species that is unique, comprising many endemic species, and provide a number of key ecosystem goods and services, including scenic vistas for human recreation, nesting sites for turtles and birds, and important areas for biogeochemical recycling, water filtration and purification. However, sandy beaches have not been well understood or appreciated as ecosystems, and consequently have a legacy of poor coastal management. In many instances this has lead to a "tyranny of small decisions", where multiple, seemingly insignificant management decisions and actions have resulted in complete transformation and degradation of the shoreline in several places. In addition to inappropriate management strategies, beaches are also poorly represented in conservation areas. Further, where they are recognised as being "conserved" in marine protected areas, this often is a false sense of protection because the far more sensitive dune portion of the littoral active zone is invariably not included in the reserve. In short, there is a need for a new way to approach sandy beach conservation and management that includes the system (dunes, intertidal beaches and surf zones) as a whole. On one hand, the approach should make provision for use of the abundant natural resources and opportunities associated with sandy shores in ways that are sustainable and contribute to biodiversity stewardship - through ecosystem-based management and marine spatial planning. But, on the other hand, it must simultaneously contribute to securing a sufficient amount of the key ecological attributes of beaches (habitats, biodiversity and processes) in a network of reserves, to ensure that the ecosystem, natural resources, and services all persist in perpetuity - through systematic conservation planning. The aim of this Thesis is to integrate these into a single approach, which I call ecosystem-based spatial conservation planning for sandy beaches, using the South African sandy shores as a case study. To achieve this broad aim, the Thesis is divided into three parts. Part 1 deals with establishing baseline information by quantifying spatial patterns in sandy beach habitats (Chapter 1), biodiversity, key assemblages and processes, and outstanding physical features (Chapter 2). First, mapping sandy beach habitats is a challenge given the vast, linear extent of shorelines and significant resources required to complete the project. Therefore, a novel approach was derived using statistical techniques (conditional inference trees) to identify physical features of beaches that can be observed on Google Earth (or similar) imagery, and that can provide good predictions of beach morphodynamic (habitat) types. Based on the results of this analysis, sandy beaches (and all other coastal habitat types) were mapped digitally in ArcGIS. Second, spatial patterns in sandy beach biodiversity (vertebrates, macrofauna, microflora and foredune plants) were mapped by compiling existing data on the distributions of key species that have been well studied or mapped previously (vertebrates and foredune plants), and by niche modelling (macrofauna and microflora). For the latter, data from all previous sandy-beach sampling events in South Africa were compiled from published and unpublished sources, and supplemented with additional sampling of 23 beaches along the national shoreline, targeting macrofauna and phytoplankton. Altogether, the macrofauna database comprised data from 135 sites and 186 sampling events, and the microflora (phytoplankton and microphytobenthos) database comprised data from 73 sites and 510 samples. The probabilistic distribution of each "resident" species (present at 10 or more sites) was modelled in MaxEnt version 3.3.3k, probability thresholds were determined statistically (to convert the data into predicted presence-absence), and displayed as a digital map. A composite biodiversity map was compiled, and key trends in species richness and endemism along the national shoreline were quantified. To supplement biodiversity proper, additional valued-features of sandy beaches were mapped, including: important assemblages; unique habitat features; and sites associated with key ecological processes. Part 2 considers threats to sandy beaches in the context of deriving an appropriate management strategy that seeks to provide for use of the coast, but in a way that has least overall impact to the ecosystem. A method for assessing cumulative threats to sandy beaches is adapted from an existing framework (Chapter 4). This entailed compiling a list of threats to beaches, and scoring these (out of 10) in terms of the severity of their respective impacts to beaches, and how long it would take the ecosystem to recover should the threat be removed. The scoring was based on the collective expert opinion of the scientific community working on sandy beaches, at a workshop during the VIth International Sandy Beach Symposium 2012. To standardize the scores and ensure broad applicability, a base case scenario of a pristine beach was established, and maximum theoretical scores were provided for this context. The method for integrating these scores into a spatial, cumulative threat assessment was then determined. In Chapter 5, the maximum theoretical scores (from Chapter 4) were down-scaled to suit the current threat regime to the South African sandy beaches, and the cumulative threat assessment methodology was applied. From this analysis, the most threatened beaches in South Africa, and the most important threats were highlighted. A decision-support tool for managers was derived from the site-specific cumulative threat-impact scores, based first on the degree of permanent habitat transformation, and second on the cumulative impact of other stressors where the impacts these stressors have could potentially be mitigated or ameliorated. Part 3 concerns conservation of beaches explicitly. It addresses how much of which valued features of beaches is required to ensure their long-term persistence, and the design of a network of beaches in South Africa that are of ecological importance and should be set aside as reserves. Conservation targets are set in Chapter 6, using species-area curves to determine a baseline percentage-area required to protect sandy beach habitats, which is modified using heuristic principles based on habitat rarity and threat status (from a recent national assessment). A fixed target was applied to all species, also modified by heuristic principles, and another fixed target was applied to key assemblages and processes.
- Full Text:
- Date Issued: 2012
- Authors: Harris, Linda Rozanne
- Date: 2012
- Subjects: Seashore -- South Africa , Bathing beaches -- South Africa , Shorelines -- South Africa , Conservation biology , PhD Thesis
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10688 , http://hdl.handle.net/10948/d1007920 , Seashore -- South Africa , Bathing beaches -- South Africa , Shorelines -- South Africa , Conservation biology
- Description: An ecosytem-based spatial conservation plan for the South African sandy beaches. Sandy beaches are valuable ecosystems. They support a collection of species that is unique, comprising many endemic species, and provide a number of key ecosystem goods and services, including scenic vistas for human recreation, nesting sites for turtles and birds, and important areas for biogeochemical recycling, water filtration and purification. However, sandy beaches have not been well understood or appreciated as ecosystems, and consequently have a legacy of poor coastal management. In many instances this has lead to a "tyranny of small decisions", where multiple, seemingly insignificant management decisions and actions have resulted in complete transformation and degradation of the shoreline in several places. In addition to inappropriate management strategies, beaches are also poorly represented in conservation areas. Further, where they are recognised as being "conserved" in marine protected areas, this often is a false sense of protection because the far more sensitive dune portion of the littoral active zone is invariably not included in the reserve. In short, there is a need for a new way to approach sandy beach conservation and management that includes the system (dunes, intertidal beaches and surf zones) as a whole. On one hand, the approach should make provision for use of the abundant natural resources and opportunities associated with sandy shores in ways that are sustainable and contribute to biodiversity stewardship - through ecosystem-based management and marine spatial planning. But, on the other hand, it must simultaneously contribute to securing a sufficient amount of the key ecological attributes of beaches (habitats, biodiversity and processes) in a network of reserves, to ensure that the ecosystem, natural resources, and services all persist in perpetuity - through systematic conservation planning. The aim of this Thesis is to integrate these into a single approach, which I call ecosystem-based spatial conservation planning for sandy beaches, using the South African sandy shores as a case study. To achieve this broad aim, the Thesis is divided into three parts. Part 1 deals with establishing baseline information by quantifying spatial patterns in sandy beach habitats (Chapter 1), biodiversity, key assemblages and processes, and outstanding physical features (Chapter 2). First, mapping sandy beach habitats is a challenge given the vast, linear extent of shorelines and significant resources required to complete the project. Therefore, a novel approach was derived using statistical techniques (conditional inference trees) to identify physical features of beaches that can be observed on Google Earth (or similar) imagery, and that can provide good predictions of beach morphodynamic (habitat) types. Based on the results of this analysis, sandy beaches (and all other coastal habitat types) were mapped digitally in ArcGIS. Second, spatial patterns in sandy beach biodiversity (vertebrates, macrofauna, microflora and foredune plants) were mapped by compiling existing data on the distributions of key species that have been well studied or mapped previously (vertebrates and foredune plants), and by niche modelling (macrofauna and microflora). For the latter, data from all previous sandy-beach sampling events in South Africa were compiled from published and unpublished sources, and supplemented with additional sampling of 23 beaches along the national shoreline, targeting macrofauna and phytoplankton. Altogether, the macrofauna database comprised data from 135 sites and 186 sampling events, and the microflora (phytoplankton and microphytobenthos) database comprised data from 73 sites and 510 samples. The probabilistic distribution of each "resident" species (present at 10 or more sites) was modelled in MaxEnt version 3.3.3k, probability thresholds were determined statistically (to convert the data into predicted presence-absence), and displayed as a digital map. A composite biodiversity map was compiled, and key trends in species richness and endemism along the national shoreline were quantified. To supplement biodiversity proper, additional valued-features of sandy beaches were mapped, including: important assemblages; unique habitat features; and sites associated with key ecological processes. Part 2 considers threats to sandy beaches in the context of deriving an appropriate management strategy that seeks to provide for use of the coast, but in a way that has least overall impact to the ecosystem. A method for assessing cumulative threats to sandy beaches is adapted from an existing framework (Chapter 4). This entailed compiling a list of threats to beaches, and scoring these (out of 10) in terms of the severity of their respective impacts to beaches, and how long it would take the ecosystem to recover should the threat be removed. The scoring was based on the collective expert opinion of the scientific community working on sandy beaches, at a workshop during the VIth International Sandy Beach Symposium 2012. To standardize the scores and ensure broad applicability, a base case scenario of a pristine beach was established, and maximum theoretical scores were provided for this context. The method for integrating these scores into a spatial, cumulative threat assessment was then determined. In Chapter 5, the maximum theoretical scores (from Chapter 4) were down-scaled to suit the current threat regime to the South African sandy beaches, and the cumulative threat assessment methodology was applied. From this analysis, the most threatened beaches in South Africa, and the most important threats were highlighted. A decision-support tool for managers was derived from the site-specific cumulative threat-impact scores, based first on the degree of permanent habitat transformation, and second on the cumulative impact of other stressors where the impacts these stressors have could potentially be mitigated or ameliorated. Part 3 concerns conservation of beaches explicitly. It addresses how much of which valued features of beaches is required to ensure their long-term persistence, and the design of a network of beaches in South Africa that are of ecological importance and should be set aside as reserves. Conservation targets are set in Chapter 6, using species-area curves to determine a baseline percentage-area required to protect sandy beach habitats, which is modified using heuristic principles based on habitat rarity and threat status (from a recent national assessment). A fixed target was applied to all species, also modified by heuristic principles, and another fixed target was applied to key assemblages and processes.
- Full Text:
- Date Issued: 2012
An estimate of the cost of electricity outages in Zimbabwe
- Authors: Kaseke, Nyasa
- Date: 2012
- Subjects: Electric power failures -- Zimbabwe , Electric utilities
- Language: English
- Type: Thesis , Doctoral , DCom
- Identifier: vital:8997 , http://hdl.handle.net/10948/d1011119 , Electric power failures -- Zimbabwe , Electric utilities
- Description: This thesis estimates the cost of electricity outages in Zimbabwe for the year 2009. Much reference is made to government, the power utility - Zimbabwe Electricity Supply Authority (ZESA) and other countries in the Southern African Power Pool (SAPP), also experiencing electricity outages. An electricity outage is a complete loss of power supply to an area. An outage may result from planned or unplanned load shedding or faults. Load shedding is accelerated by power supply shortages. The shortages are experienced during peak demand times. In 2009, Zimbabwe’s peak demand was about 1574MW. ZESA had the capacity to supply 1080MW and imported 100MW (guaranteed from Mozambique), leaving a shortfall of 394MW. This shortfall is worsened by transmission losses (about 108MW) and consumption by ZESA properties (about 200MW) bringng down the supply to customers of about 700MW. The supply shortage is the result of a lack of investment in the power sector by government for expanded generation capacity, incorrect pricing, droughts, internal conflicts, skills flight, government energy sector regulation, vandalism of equipment and under supply of coal to thermal power stations. Consumers in all sectors are experiencing power outage incidences of different duration. The severity of the inconvenience depends on the load shedding time table, preferences of the power utility and arrangements that can be made with the utility. Power outages negatively affect (and result in cost to) the productive sectors (industry, mining and farming) and households. The main objective of the thesis is to estimate the cost of power outages to the sectors. Sub-objectives of the study include: to identify the main features of power crisis in Zimbabwe and government response to it with a regional power generated setting; to formulate a model that clearly identifies the different cost components of power outages in Zimbabwe; to identify appropriate methods by which to estimate these cost components; to estimate the cost of power outages to the productive sectors (mining, agriculture and industrial) and households of Zimbabwe; to critically analyse the credibility of these estimates, and to consider the saving of the costs of outages achieved through increased investment in generating capacity in Zimbabwe. ZESA undertook reforms (institutional and tariff) in order to improve management efficiencies and supply. It was divided into five entities resulting in management and financial improvement, but its reform of tariffs has been stiffled by subsidies and price regulations. ZESA adopted the cost plus rate of return pricing strategy in 2004 but regulation kept the tariff below cost. The regulation is pro-poor in aim but it encourages wasteful consumption. Similar supply shortages are affecting the whole SAPP group. The power pool load shed 758MW in 2009. In Zimbabwe alone load shedding was 315MW. In an attempt to solve the problem, member utilities engage in bilateral contacts and short-term trading through Short Term Energy Markets (STEM). A number of Southern African countries have to load shed - the average frequency being three to five (3-5) times per week for the region. A number of studies have been carried out by different scholars attempting to assess the impact and cost of outages. The general conclusion is that power outages cause significant costs to consumers, both direct and indirect. From a global perspective, the increase in the quality of electricity supplied has fallen behind the increase in quantity demanded, causing an increase of incidence in power outages. An analysis of Sub-Saharan Africa shows that the causes of supply shortages are natural (drought), oil price shocks, conflict and the lack of investment in generation capacity. This generates two outage cost estimates – a direct cost (welfare loss) and indirect cost (backup cost). The sum of these estimates is the total outage cost. The direct cost estimate is based on direct loss incurred during the power outages - lost production, lost materials, and lost time or leisure. In order to derive an estimated direct cost, it is necessary to obtain an accurate respondent self-assessment, which, in turn depends on the keeping of good records of hours of outages and losses incurred during outage times. The estimated indirect cost (backup cost) is derived from the cost of investment in backup sources and running of these sources as a mitigating measure during a power outage. The expected gain from self-generated kWh is assumed to be equal to the expected loss from the marginal kWh electricity not supplied by the utility (the outage). The annualised capital cost of backup source plus the variable cost of generating electricity by the backup source are another element of the cost of power outages. The prices of backup sources were obtained from the two leading retailers, Tendo Power and Ellis Electronics. To the extent that the captive generation includes investment in emergency or optional plant (as part of normal production infrastructure), it may overestimate cost.
- Full Text:
- Date Issued: 2012
- Authors: Kaseke, Nyasa
- Date: 2012
- Subjects: Electric power failures -- Zimbabwe , Electric utilities
- Language: English
- Type: Thesis , Doctoral , DCom
- Identifier: vital:8997 , http://hdl.handle.net/10948/d1011119 , Electric power failures -- Zimbabwe , Electric utilities
- Description: This thesis estimates the cost of electricity outages in Zimbabwe for the year 2009. Much reference is made to government, the power utility - Zimbabwe Electricity Supply Authority (ZESA) and other countries in the Southern African Power Pool (SAPP), also experiencing electricity outages. An electricity outage is a complete loss of power supply to an area. An outage may result from planned or unplanned load shedding or faults. Load shedding is accelerated by power supply shortages. The shortages are experienced during peak demand times. In 2009, Zimbabwe’s peak demand was about 1574MW. ZESA had the capacity to supply 1080MW and imported 100MW (guaranteed from Mozambique), leaving a shortfall of 394MW. This shortfall is worsened by transmission losses (about 108MW) and consumption by ZESA properties (about 200MW) bringng down the supply to customers of about 700MW. The supply shortage is the result of a lack of investment in the power sector by government for expanded generation capacity, incorrect pricing, droughts, internal conflicts, skills flight, government energy sector regulation, vandalism of equipment and under supply of coal to thermal power stations. Consumers in all sectors are experiencing power outage incidences of different duration. The severity of the inconvenience depends on the load shedding time table, preferences of the power utility and arrangements that can be made with the utility. Power outages negatively affect (and result in cost to) the productive sectors (industry, mining and farming) and households. The main objective of the thesis is to estimate the cost of power outages to the sectors. Sub-objectives of the study include: to identify the main features of power crisis in Zimbabwe and government response to it with a regional power generated setting; to formulate a model that clearly identifies the different cost components of power outages in Zimbabwe; to identify appropriate methods by which to estimate these cost components; to estimate the cost of power outages to the productive sectors (mining, agriculture and industrial) and households of Zimbabwe; to critically analyse the credibility of these estimates, and to consider the saving of the costs of outages achieved through increased investment in generating capacity in Zimbabwe. ZESA undertook reforms (institutional and tariff) in order to improve management efficiencies and supply. It was divided into five entities resulting in management and financial improvement, but its reform of tariffs has been stiffled by subsidies and price regulations. ZESA adopted the cost plus rate of return pricing strategy in 2004 but regulation kept the tariff below cost. The regulation is pro-poor in aim but it encourages wasteful consumption. Similar supply shortages are affecting the whole SAPP group. The power pool load shed 758MW in 2009. In Zimbabwe alone load shedding was 315MW. In an attempt to solve the problem, member utilities engage in bilateral contacts and short-term trading through Short Term Energy Markets (STEM). A number of Southern African countries have to load shed - the average frequency being three to five (3-5) times per week for the region. A number of studies have been carried out by different scholars attempting to assess the impact and cost of outages. The general conclusion is that power outages cause significant costs to consumers, both direct and indirect. From a global perspective, the increase in the quality of electricity supplied has fallen behind the increase in quantity demanded, causing an increase of incidence in power outages. An analysis of Sub-Saharan Africa shows that the causes of supply shortages are natural (drought), oil price shocks, conflict and the lack of investment in generation capacity. This generates two outage cost estimates – a direct cost (welfare loss) and indirect cost (backup cost). The sum of these estimates is the total outage cost. The direct cost estimate is based on direct loss incurred during the power outages - lost production, lost materials, and lost time or leisure. In order to derive an estimated direct cost, it is necessary to obtain an accurate respondent self-assessment, which, in turn depends on the keeping of good records of hours of outages and losses incurred during outage times. The estimated indirect cost (backup cost) is derived from the cost of investment in backup sources and running of these sources as a mitigating measure during a power outage. The expected gain from self-generated kWh is assumed to be equal to the expected loss from the marginal kWh electricity not supplied by the utility (the outage). The annualised capital cost of backup source plus the variable cost of generating electricity by the backup source are another element of the cost of power outages. The prices of backup sources were obtained from the two leading retailers, Tendo Power and Ellis Electronics. To the extent that the captive generation includes investment in emergency or optional plant (as part of normal production infrastructure), it may overestimate cost.
- Full Text:
- Date Issued: 2012
An evaluation of programming assistance tools to support the learning of IT programming: a case study in South African secondary schools
- Authors: Koorsse, Melisa
- Date: 2012
- Subjects: Computer science , Computer literacy , Computer programming
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10472 , http://hdl.handle.net/10948/d1010581 , Computer science , Computer literacy , Computer programming
- Description: Worldwide, there is a decline in interest in the computer science profession and in the subject at secondary school level. Novice programmers struggle to understand introductory programming concepts and this difficulty of learning to program is contributing to the lack of interest in the field of computer science. Information Technology (IT) learners in South African secondary schools are novice programmers, introduced to introductory programming concepts in the subject which also includes topics on hardware and system software, e-communication, social and ethical issues, spreadsheets and databases. The difficulties faced by IT learners are worsened by the lack of suitably qualified teachers, a saturated learning programme that allocates very little time to the understanding of complex programming concepts and limited class time where practical examples can be implemented with the support of the IT teacher. This research proposes that IT learners could be supported by a programming assistance tool (PAT). A PAT is a software program that can be used by novice programmers to learn how to program and/or improve their understanding of programming concepts. PATs use different techniques to assist novice programmers. The main objective of this research was to determine whether the use of a PAT impacted IT learners’ understanding of programming concepts and motivation towards programming. The literature study and feedback from IT learners and teachers were used to identify novice programming difficulties and IT learner programming difficulties, respectively. Selection criteria were derived from the programming difficulties identified. The selection criteria were grouped into three categories, namely, programming concepts, programming knowledge and programming skills. Existing PATs were evaluated using the selection criteria and three PATs, namely, RoboMind, Scratch and B#, were selected as suitable for use by IT learners. RoboMind was adapted in this research study, allowing it to support the Delphi programming language. The three PATs were evaluated by participating IT learners at four schools. The findings of this research provided no conclusive evidence that IT learners who used a PAT had a significantly better understanding of programming concepts and motivation towards programming than learners who did not use a PAT. IT learner feedback was used to identify the strengths and shortcomings of the three PATs and to provide recommendations for the development of PATs specifically to support IT learners. This research study has provided several theoretical and practical contributions, including the research design, selection criteria, adaptations to RoboMind and the evaluation of the three PATs. In addition, IT teachers and learners have been made aware of PATs and the support that can be provided by these PATs. IT teachers have also been provided with a means of selecting PATs applicable to the IT curriculum. All the research contributions have formed the basis for future work, such as improving and extending RoboMind’s functionality and support of programming concepts, the refinement of the selection criteria and, ultimately, the development of a new PAT, specifically designed to support IT learner understanding of programming concepts and motivation towards programming.
- Full Text:
- Date Issued: 2012
- Authors: Koorsse, Melisa
- Date: 2012
- Subjects: Computer science , Computer literacy , Computer programming
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10472 , http://hdl.handle.net/10948/d1010581 , Computer science , Computer literacy , Computer programming
- Description: Worldwide, there is a decline in interest in the computer science profession and in the subject at secondary school level. Novice programmers struggle to understand introductory programming concepts and this difficulty of learning to program is contributing to the lack of interest in the field of computer science. Information Technology (IT) learners in South African secondary schools are novice programmers, introduced to introductory programming concepts in the subject which also includes topics on hardware and system software, e-communication, social and ethical issues, spreadsheets and databases. The difficulties faced by IT learners are worsened by the lack of suitably qualified teachers, a saturated learning programme that allocates very little time to the understanding of complex programming concepts and limited class time where practical examples can be implemented with the support of the IT teacher. This research proposes that IT learners could be supported by a programming assistance tool (PAT). A PAT is a software program that can be used by novice programmers to learn how to program and/or improve their understanding of programming concepts. PATs use different techniques to assist novice programmers. The main objective of this research was to determine whether the use of a PAT impacted IT learners’ understanding of programming concepts and motivation towards programming. The literature study and feedback from IT learners and teachers were used to identify novice programming difficulties and IT learner programming difficulties, respectively. Selection criteria were derived from the programming difficulties identified. The selection criteria were grouped into three categories, namely, programming concepts, programming knowledge and programming skills. Existing PATs were evaluated using the selection criteria and three PATs, namely, RoboMind, Scratch and B#, were selected as suitable for use by IT learners. RoboMind was adapted in this research study, allowing it to support the Delphi programming language. The three PATs were evaluated by participating IT learners at four schools. The findings of this research provided no conclusive evidence that IT learners who used a PAT had a significantly better understanding of programming concepts and motivation towards programming than learners who did not use a PAT. IT learner feedback was used to identify the strengths and shortcomings of the three PATs and to provide recommendations for the development of PATs specifically to support IT learners. This research study has provided several theoretical and practical contributions, including the research design, selection criteria, adaptations to RoboMind and the evaluation of the three PATs. In addition, IT teachers and learners have been made aware of PATs and the support that can be provided by these PATs. IT teachers have also been provided with a means of selecting PATs applicable to the IT curriculum. All the research contributions have formed the basis for future work, such as improving and extending RoboMind’s functionality and support of programming concepts, the refinement of the selection criteria and, ultimately, the development of a new PAT, specifically designed to support IT learner understanding of programming concepts and motivation towards programming.
- Full Text:
- Date Issued: 2012
An evaluation of the implementation of decentralization of the World Bank's operations of poverty reduction in Uganda
- Okiria-Ofwono Jacqueline Jane
- Authors: Okiria-Ofwono Jacqueline Jane
- Date: 2012
- Subjects: Decentralization in government -- Uganda , Poverty -- Africa, Sub-Saharan , Sustainable development -- Africa, Sub-Saharan , Poverty – Uganda -- International cooperation
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9105 , http://hdl.handle.net/10948/d1012605 , Decentralization in government -- Uganda , Poverty -- Africa, Sub-Saharan , Sustainable development -- Africa, Sub-Saharan , Poverty – Uganda -- International cooperation
- Description: Continued debates on economic development, poverty eradication and the growing skeptism concerning the paradigms proposed through many decades, has led to a continued search for a paradigm that would, finally, resolve the issue of pervasive poverty in the Sub-Saharan Africa. Having implemented decentralization within government entities without any significant contribution to poverty eradication, the focus has now turned to the development agencies themselves. What are the inefficiencies in these agencies which if addressed might enable them deliver development aid more efficiently thus, providing more resources for development from being lost in the attrition of overheads? It is, therefore, argued that decentralization of development agencies will improve the efficiency and effectiveness of IFIs in delivering development aid. At the same time, decentralization reforms have been proposed as a response to the failures of highly centralized states (or organizations in this case). Empirical evidence, strongly, suggests that physical proximity and more "face-time", promotes better results-on-the-ground, delivered by staff who are better attuned to local conditions and have a better understanding of the client and their development agenda. But, will decentralization alone solve the issue of pervasive poverty? This research recognises that the factors affecting poverty are diverse and intricate and isolating just one part of the puzzle is not enough. Nevertheless, it is argues that decentralization, has a positive impact on poverty reduction thus, this study presents both practical and theoretical considerations from which policy measures can be derived. This thesis focused on establishing how the World Bank, changed its strategies through the implementation of decentralization of its operations as proposed in the ‗Strategic Compact‘, renewed the way it worked in order to maintain its relevance in the development world. The World Bank President, James Wolfensohn, proposed the Compact as a solution to the organization‘s self diagnosis that it was in distress, in a state of possible decline and was not fulfilling its mission of poverty eradication. This research, using Uganda Country Office as a case study, undertook, mainly, a qualitative review of the overall strategy of decentralization and its implementation organization wide and specifically, in Uganda. The research examined how the implementation of the strategy impacted on poverty trends in Uganda. This research found that the decentralization strategy was, fundamentally, the right one to deliver better results of the Bank‘s mission of ‗fighting poverty for lasting results‘ and its vision of ‗A World Free of Poverty‘. Contrary to the popular notion that the World Bank has been, largely ineffective in the delivery of its mission and its decentralization strategy just another one of its 'shams‘, this research established that the implementation of the strategy, although not having a direct or causal relationship, did have positive impact on poverty alleviation in Uganda. This study, therefore, makes a case for decentralization of donor organizations as a means of better delivery of the poverty eradication agenda in the developing world. The benefits though hard to measure in monetary terms are, nevertheless, real in terms of faster and better quality engagement with the clients which in turn, result into better delivery of services and programmes.
- Full Text:
- Date Issued: 2012
- Authors: Okiria-Ofwono Jacqueline Jane
- Date: 2012
- Subjects: Decentralization in government -- Uganda , Poverty -- Africa, Sub-Saharan , Sustainable development -- Africa, Sub-Saharan , Poverty – Uganda -- International cooperation
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9105 , http://hdl.handle.net/10948/d1012605 , Decentralization in government -- Uganda , Poverty -- Africa, Sub-Saharan , Sustainable development -- Africa, Sub-Saharan , Poverty – Uganda -- International cooperation
- Description: Continued debates on economic development, poverty eradication and the growing skeptism concerning the paradigms proposed through many decades, has led to a continued search for a paradigm that would, finally, resolve the issue of pervasive poverty in the Sub-Saharan Africa. Having implemented decentralization within government entities without any significant contribution to poverty eradication, the focus has now turned to the development agencies themselves. What are the inefficiencies in these agencies which if addressed might enable them deliver development aid more efficiently thus, providing more resources for development from being lost in the attrition of overheads? It is, therefore, argued that decentralization of development agencies will improve the efficiency and effectiveness of IFIs in delivering development aid. At the same time, decentralization reforms have been proposed as a response to the failures of highly centralized states (or organizations in this case). Empirical evidence, strongly, suggests that physical proximity and more "face-time", promotes better results-on-the-ground, delivered by staff who are better attuned to local conditions and have a better understanding of the client and their development agenda. But, will decentralization alone solve the issue of pervasive poverty? This research recognises that the factors affecting poverty are diverse and intricate and isolating just one part of the puzzle is not enough. Nevertheless, it is argues that decentralization, has a positive impact on poverty reduction thus, this study presents both practical and theoretical considerations from which policy measures can be derived. This thesis focused on establishing how the World Bank, changed its strategies through the implementation of decentralization of its operations as proposed in the ‗Strategic Compact‘, renewed the way it worked in order to maintain its relevance in the development world. The World Bank President, James Wolfensohn, proposed the Compact as a solution to the organization‘s self diagnosis that it was in distress, in a state of possible decline and was not fulfilling its mission of poverty eradication. This research, using Uganda Country Office as a case study, undertook, mainly, a qualitative review of the overall strategy of decentralization and its implementation organization wide and specifically, in Uganda. The research examined how the implementation of the strategy impacted on poverty trends in Uganda. This research found that the decentralization strategy was, fundamentally, the right one to deliver better results of the Bank‘s mission of ‗fighting poverty for lasting results‘ and its vision of ‗A World Free of Poverty‘. Contrary to the popular notion that the World Bank has been, largely ineffective in the delivery of its mission and its decentralization strategy just another one of its 'shams‘, this research established that the implementation of the strategy, although not having a direct or causal relationship, did have positive impact on poverty alleviation in Uganda. This study, therefore, makes a case for decentralization of donor organizations as a means of better delivery of the poverty eradication agenda in the developing world. The benefits though hard to measure in monetary terms are, nevertheless, real in terms of faster and better quality engagement with the clients which in turn, result into better delivery of services and programmes.
- Full Text:
- Date Issued: 2012
An evaluation of the nature and extent of alignment between the strategic performance plans of selected Eastern Cape provincial government departments and the provincial growth and development plan 2004-2014
- Authors: Mbanga, Sijekula Larrington
- Date: 2012
- Subjects: Eastern Cape Provincial government (South Africa) , Strategic planning , Public administration -- South Africa -- Planning , Performance -- Management
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:8253 , http://hdl.handle.net/10948/d1011942 , Eastern Cape Provincial government (South Africa) , Strategic planning , Public administration -- South Africa -- Planning , Performance -- Management
- Description: One of the key challenges that continue to confront governments, worldwide, with regard to development management, other than the obvious limited resources to meet the overwhelming and competing needs of the constituencies, is the efficiency and effectiveness of the state machinery. Within state machinery itself the major issue that is viewed as a primary shortcoming is the process of translating sound development policies into implementable programmes and projects. Within the processes of policy implementation the key weaknesses appear to lie on planning processes. As such, governments continue to cite poor alignment between policies, plans and priorities across various spheres of government, a challenge that manifests itself in a lack of integrated service delivery, duplication in application of resources and efforts, lack of sustainability of development initiatives, slow pace and poor quality of services provided to communities. This study was aimed at evaluating the nature and extent of alignment between the Strategic Performance Plans of selected Eastern Cape provincial government departments and the Provincial Growth and Development Plan (PGDP): 2004-2014. The main objectives of the study were to gain insight into the nature and extent of alignment between the Strategic Performance Plans of selected Eastern Cape provincial government departments and the PGDP objectives, indicators and targets; identify the new service delivery mechanisms, policies, procedures and change management plans that have been introduced, if any, to ensure the successful implementation of the PGDP programmes; and indentify risks and challenges that pose a threat to the successful implementation of the PGDP programmes and provide preliminary risk response strategies. Of paramount importance is that this study was not limited to assessing the nature and extent of harmony or strategic fit between a macro-provincial plan, known as the PGDP, and sector specific plans, called Strategic Performance Plans, but it sought to determine the bases of alignment, where it exists, and sources of misalignment where planning disjuncture are found. To this end, the study was intended to generate a conceptual framework for assessing alignment of plans within public institutions across all levels of government. Ten provincial government departments drawn from the four provincial administrative clusters that feed their work into, and hence accountable to various Cabinet Committees and, ultimately, Cabinet, participated in the study. Key issues that emerged, and remained unresolved, during the direct engagement of provincial government departments were consolidated and verified, later on, with the public entity that supports the Office of the Premier on matters of macro-policy and strategy development and socio-economic research, known as the Eastern Cape Socio Economic and Consultative Council (ECSECC). This study followed a qualitative research methodology approach. Strategic Performance Plans of selected provincial government departments were analysed to establish linkages with the PGDP. A standard Alignment Evaluation Matrix was utilized to provide the results of content analysis of departmental plans. This Matrix was developed based on extensive literature study conducted that yielded a working Strategic Planning Alignment Model. The results of analysis of departmental plans and the key features of the Planning Alignment Model formed the basis of engagement of selected government departments during field study. Managers and officials working in components such as Strategic Planning, Monitoring and Evaluation, Special Programmes, infrastructure Planning, Demand Management and Research, Budget Planning and Control, Municipal Support, Geographic Information Systems and Spatial Planning, participated in the focus groupdiscussions. This study revealed both positive and negative factors on how provincial government departments have, over time, attempted to give effect to the intentions of the Provincial Growth and Development Plan; 2004-2014. Firstly, the study demonstrated that the PGDP was viewed in the same light as any other planning framework generated at national and local government level, with its priorities and targets found in the same basket of policy issues that are competing for limited resources. Secondly, it was found that the PGDP has, over time, degenerated in terms of its strategic significance in the planning environment, with new priorities that have emerged at a national government level securing more attention of politicians and senior administrators at the detriment of the PGDP intentions. Political championing of the PGDP was viewed as having dwindled from one term of government to the next. As such, the PGDP was not found to be having the level of significance and traction that the regionalist-planning paradigm is beginning to suggest within the global policy development discourse. Thirdly, the study revealed that while plans of selected government departments had a sound articulation of the PGDP goals, this did not translate into well-costed operational plans with clear targets and timelines that link to the 2014 targets. Organisational structures and service delivery models of the selected government departments had not fundamentally changed since the PGDP was introduced in the Province. Incremental changes to departmental processes have been seen since the PGDP came into effect. The changes were more influenced by new priorities that emerged at national government level. As such, provincial government departments continued to be more inclined towards sector priorities which could be viewed as unfunded provincial priorities. As such, budget allocation to PGDP programmes was limited from department to department, due to competing national priorities. One argument advanced for this disjuncture in planning was that the PGDP itself should have, from time to time, been reviewed to consider priorities that might have emerged at national and local government sphere, including conditions that have changed in the socio, economic and political environments. This seemed not to have happened, despite a Planning Coordination and Monitoring Unit being established within the Office of the Premier, during PGDP inception, for this explicit purpose. Fourthly, the study noted the challenge of different planning cycles between the provincial and local government spheres, which was viewed as promoting planning disjuncture within the two spheres. This was pointed out as of critical importance in alignment since provincial government departments are expected to respond to community needs that are embodied in Integrated Development Plans of municipalities. For this vertical integration to happen, the study revealed that there has been over-reliance in inter-governmental structures which were relatively weak in various municipalities. In the same vein, horizontal integration at provincial government level seemed to be a challenge also due to the ineffectiveness of the cluster system introduced since 1999. While part of a Cluster system, and submitting plans and reports to Clusters, provincial government departments continued to work in silos. Priority setting, spatial targeting and resource allocation has remained a competency of individual provincial departments. The cluster budgeting and programme implementation envisaged in the PGDP was still to be seen, and it appeared that there was no Treasury tool to give effect to this noble intention. In fact, this intention was viewed as contradictory with the spirit of the Public Finance Management Act, 1999 that places single financial accountability on Heads of Departments, as individuals rather than a group or cluster. Fifthly, the study further revealed that the PGDP itself had design deficiencies that created a challenge for implementation, monitoring and evaluation. The PGDP was viewed as straddling between being a strategic framework that guides socio-economic planning, with a longer-term focus, and being a provincial plan. The PGDP was also found to be an all encompassing plan that contains a basket of everything that a provincial government would be expected to do. A viewpoint advanced herein regards international experience which suggests that being strategic means being selective, sorting the critical few from the important many, and giving that selection a ‘bite’ by shifting resources and demanding performance sufficient to make the desired impact. The latter was viewed as a fundamental shortcoming of the PGDP. In fact, the study revealed that some of the PGDP programmes were underway within provincial government departments even before the PGDP was formulated. Whether those programmes would serve the province achieve the few outcomes it set itself for 2014, is a matter the PGDP design could not confirm. It also transpired that a number of provincial departments were not adequately consulted during the determination of PGDP targets. Furthermore, it has emerged that the province lacks coherent competency at a level higher than provincial departments, which is capacitated with a pool of analysts possessing a deeper appreciation of various government sectors and the provincial economy. This competency would include development planners, spatial planners, sector policy analysts, researchers and other technical skills.
- Full Text:
- Date Issued: 2012
- Authors: Mbanga, Sijekula Larrington
- Date: 2012
- Subjects: Eastern Cape Provincial government (South Africa) , Strategic planning , Public administration -- South Africa -- Planning , Performance -- Management
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:8253 , http://hdl.handle.net/10948/d1011942 , Eastern Cape Provincial government (South Africa) , Strategic planning , Public administration -- South Africa -- Planning , Performance -- Management
- Description: One of the key challenges that continue to confront governments, worldwide, with regard to development management, other than the obvious limited resources to meet the overwhelming and competing needs of the constituencies, is the efficiency and effectiveness of the state machinery. Within state machinery itself the major issue that is viewed as a primary shortcoming is the process of translating sound development policies into implementable programmes and projects. Within the processes of policy implementation the key weaknesses appear to lie on planning processes. As such, governments continue to cite poor alignment between policies, plans and priorities across various spheres of government, a challenge that manifests itself in a lack of integrated service delivery, duplication in application of resources and efforts, lack of sustainability of development initiatives, slow pace and poor quality of services provided to communities. This study was aimed at evaluating the nature and extent of alignment between the Strategic Performance Plans of selected Eastern Cape provincial government departments and the Provincial Growth and Development Plan (PGDP): 2004-2014. The main objectives of the study were to gain insight into the nature and extent of alignment between the Strategic Performance Plans of selected Eastern Cape provincial government departments and the PGDP objectives, indicators and targets; identify the new service delivery mechanisms, policies, procedures and change management plans that have been introduced, if any, to ensure the successful implementation of the PGDP programmes; and indentify risks and challenges that pose a threat to the successful implementation of the PGDP programmes and provide preliminary risk response strategies. Of paramount importance is that this study was not limited to assessing the nature and extent of harmony or strategic fit between a macro-provincial plan, known as the PGDP, and sector specific plans, called Strategic Performance Plans, but it sought to determine the bases of alignment, where it exists, and sources of misalignment where planning disjuncture are found. To this end, the study was intended to generate a conceptual framework for assessing alignment of plans within public institutions across all levels of government. Ten provincial government departments drawn from the four provincial administrative clusters that feed their work into, and hence accountable to various Cabinet Committees and, ultimately, Cabinet, participated in the study. Key issues that emerged, and remained unresolved, during the direct engagement of provincial government departments were consolidated and verified, later on, with the public entity that supports the Office of the Premier on matters of macro-policy and strategy development and socio-economic research, known as the Eastern Cape Socio Economic and Consultative Council (ECSECC). This study followed a qualitative research methodology approach. Strategic Performance Plans of selected provincial government departments were analysed to establish linkages with the PGDP. A standard Alignment Evaluation Matrix was utilized to provide the results of content analysis of departmental plans. This Matrix was developed based on extensive literature study conducted that yielded a working Strategic Planning Alignment Model. The results of analysis of departmental plans and the key features of the Planning Alignment Model formed the basis of engagement of selected government departments during field study. Managers and officials working in components such as Strategic Planning, Monitoring and Evaluation, Special Programmes, infrastructure Planning, Demand Management and Research, Budget Planning and Control, Municipal Support, Geographic Information Systems and Spatial Planning, participated in the focus groupdiscussions. This study revealed both positive and negative factors on how provincial government departments have, over time, attempted to give effect to the intentions of the Provincial Growth and Development Plan; 2004-2014. Firstly, the study demonstrated that the PGDP was viewed in the same light as any other planning framework generated at national and local government level, with its priorities and targets found in the same basket of policy issues that are competing for limited resources. Secondly, it was found that the PGDP has, over time, degenerated in terms of its strategic significance in the planning environment, with new priorities that have emerged at a national government level securing more attention of politicians and senior administrators at the detriment of the PGDP intentions. Political championing of the PGDP was viewed as having dwindled from one term of government to the next. As such, the PGDP was not found to be having the level of significance and traction that the regionalist-planning paradigm is beginning to suggest within the global policy development discourse. Thirdly, the study revealed that while plans of selected government departments had a sound articulation of the PGDP goals, this did not translate into well-costed operational plans with clear targets and timelines that link to the 2014 targets. Organisational structures and service delivery models of the selected government departments had not fundamentally changed since the PGDP was introduced in the Province. Incremental changes to departmental processes have been seen since the PGDP came into effect. The changes were more influenced by new priorities that emerged at national government level. As such, provincial government departments continued to be more inclined towards sector priorities which could be viewed as unfunded provincial priorities. As such, budget allocation to PGDP programmes was limited from department to department, due to competing national priorities. One argument advanced for this disjuncture in planning was that the PGDP itself should have, from time to time, been reviewed to consider priorities that might have emerged at national and local government sphere, including conditions that have changed in the socio, economic and political environments. This seemed not to have happened, despite a Planning Coordination and Monitoring Unit being established within the Office of the Premier, during PGDP inception, for this explicit purpose. Fourthly, the study noted the challenge of different planning cycles between the provincial and local government spheres, which was viewed as promoting planning disjuncture within the two spheres. This was pointed out as of critical importance in alignment since provincial government departments are expected to respond to community needs that are embodied in Integrated Development Plans of municipalities. For this vertical integration to happen, the study revealed that there has been over-reliance in inter-governmental structures which were relatively weak in various municipalities. In the same vein, horizontal integration at provincial government level seemed to be a challenge also due to the ineffectiveness of the cluster system introduced since 1999. While part of a Cluster system, and submitting plans and reports to Clusters, provincial government departments continued to work in silos. Priority setting, spatial targeting and resource allocation has remained a competency of individual provincial departments. The cluster budgeting and programme implementation envisaged in the PGDP was still to be seen, and it appeared that there was no Treasury tool to give effect to this noble intention. In fact, this intention was viewed as contradictory with the spirit of the Public Finance Management Act, 1999 that places single financial accountability on Heads of Departments, as individuals rather than a group or cluster. Fifthly, the study further revealed that the PGDP itself had design deficiencies that created a challenge for implementation, monitoring and evaluation. The PGDP was viewed as straddling between being a strategic framework that guides socio-economic planning, with a longer-term focus, and being a provincial plan. The PGDP was also found to be an all encompassing plan that contains a basket of everything that a provincial government would be expected to do. A viewpoint advanced herein regards international experience which suggests that being strategic means being selective, sorting the critical few from the important many, and giving that selection a ‘bite’ by shifting resources and demanding performance sufficient to make the desired impact. The latter was viewed as a fundamental shortcoming of the PGDP. In fact, the study revealed that some of the PGDP programmes were underway within provincial government departments even before the PGDP was formulated. Whether those programmes would serve the province achieve the few outcomes it set itself for 2014, is a matter the PGDP design could not confirm. It also transpired that a number of provincial departments were not adequately consulted during the determination of PGDP targets. Furthermore, it has emerged that the province lacks coherent competency at a level higher than provincial departments, which is capacitated with a pool of analysts possessing a deeper appreciation of various government sectors and the provincial economy. This competency would include development planners, spatial planners, sector policy analysts, researchers and other technical skills.
- Full Text:
- Date Issued: 2012
An evaluation of women participation in housing delivery in the Eastern Cape Province of South Africa: the case of the Mdantsane Township in Buffalo City Municipality (1962–2012)
- Ssekibuule, Henry Jacob Festus
- Authors: Ssekibuule, Henry Jacob Festus
- Date: 2012
- Language: English
- Type: Thesis , Doctoral , PhD (in Public Administration)
- Identifier: vital:11689 , http://hdl.handle.net/10353/d1013593
- Description: This study, Women Participation in Housing Delivery of the Mdantsane Township Buffalo City Metropolitan Municipality (BCMM) Area is explained in this thesis as a heterogeneous, long lasting, immobile and an essential consumer good that need to be delivered to the homeless. Such a delivery process needs to ensure that the Buffalo City Metropolitan Municipality area remains sustainable. Women's participation in housing delivery in South Africa; the extent of empowerment in the post 1994 era, with specific reference to case studies in Mdantsane Township 1962 -1998, begins with the premise that post-apartheid housing policies, compared to those of the apartheid era, have provided women with greater access to housing. In 1994, the housing backlog was estimated to be about 3.5 million units, with the majority of those in need of shelter, being African women. This backlog was due to past policies that largely excluded women from ownership and access to capital or resources to build formal housing. The changes wrought by the democratic dispensation, such as constitutional provision for gender equality, promised women greater participation in the social, political and economic spheres of the country. The recognition of gender equality and housing as rights protected within the constitution was reinforced by pronouncements in various policy documents, such as the Housing White Paper (HWP) that underlined the need for women's involvement in shelter development. When the Government of National Unity took office in 1994, it inherited a country with severe inequalities in resource distribution and land ownership. In particular, it inherited a housing crisis, which was largely, caused by apartheid legislation and policies. This research focused on the women participation in the housing delivery crisis from 1962 to post-1994, by considering the impact and effect of the constitutional right towards women to have access to adequate housing, especially for those living in intolerable conditions. It does so by utilising a social-scientific approach to the law. This approach acknowledges that the housing right must exist alongside other social phenomena and as a part of everyday life in South Africa. Accordingly, the implementation of the housing right by three local municipalities in the EC was examined.
- Full Text:
- Date Issued: 2012
- Authors: Ssekibuule, Henry Jacob Festus
- Date: 2012
- Language: English
- Type: Thesis , Doctoral , PhD (in Public Administration)
- Identifier: vital:11689 , http://hdl.handle.net/10353/d1013593
- Description: This study, Women Participation in Housing Delivery of the Mdantsane Township Buffalo City Metropolitan Municipality (BCMM) Area is explained in this thesis as a heterogeneous, long lasting, immobile and an essential consumer good that need to be delivered to the homeless. Such a delivery process needs to ensure that the Buffalo City Metropolitan Municipality area remains sustainable. Women's participation in housing delivery in South Africa; the extent of empowerment in the post 1994 era, with specific reference to case studies in Mdantsane Township 1962 -1998, begins with the premise that post-apartheid housing policies, compared to those of the apartheid era, have provided women with greater access to housing. In 1994, the housing backlog was estimated to be about 3.5 million units, with the majority of those in need of shelter, being African women. This backlog was due to past policies that largely excluded women from ownership and access to capital or resources to build formal housing. The changes wrought by the democratic dispensation, such as constitutional provision for gender equality, promised women greater participation in the social, political and economic spheres of the country. The recognition of gender equality and housing as rights protected within the constitution was reinforced by pronouncements in various policy documents, such as the Housing White Paper (HWP) that underlined the need for women's involvement in shelter development. When the Government of National Unity took office in 1994, it inherited a country with severe inequalities in resource distribution and land ownership. In particular, it inherited a housing crisis, which was largely, caused by apartheid legislation and policies. This research focused on the women participation in the housing delivery crisis from 1962 to post-1994, by considering the impact and effect of the constitutional right towards women to have access to adequate housing, especially for those living in intolerable conditions. It does so by utilising a social-scientific approach to the law. This approach acknowledges that the housing right must exist alongside other social phenomena and as a part of everyday life in South Africa. Accordingly, the implementation of the housing right by three local municipalities in the EC was examined.
- Full Text:
- Date Issued: 2012
An investigation into challenges facing Further Education Training (FET) leaners in the study of Isixhosa in the Port Elizabeth district
- Authors: Mpofu, Nombulelo Patience
- Date: 2012
- Subjects: Xhosa language -- Study and teaching (Secondary) , Port Elizabeth (South Africa) , Effective teaching
- Language: English
- Type: Thesis , Doctoral , DLitt
- Identifier: vital:11840 , http://hdl.handle.net/10353/d1013389 , Xhosa language -- Study and teaching (Secondary) , Port Elizabeth (South Africa) , Effective teaching
- Description: The essential function of a language is communication. Effective communication takes place when speakers understand each other‟s language. Speakers of different languages these days stay with each other. This kind of setting results into multilingualism. Multilingualism refers to the use or maintenance of more than one language in a certain context. In this regard it may refer to the fact that many languages are spoken in South Africa. It serves as a natural solution to the problem of language contact that is extremely widespread throughout South Africa and the world at large. The recognition of the multilingual nature of South African society by the Constitution of this country , as (Made 2010) puts it, necessitates the creation of tools of implementation and redress, in the form of appropriate language policies. Such language policies are designed to correct the universal tendency to practise monolingualism in multilingual societies which disempowers non-mother tongue speakers of the dominant language, to the detriment of both their rights as citizens and in communicative equity in exercising these rights. Many Black South Africans took employment in the industrial centres through urbanization, where they learnt many languages such as Fanakalo, English, Afrikaans and many other languages in the African continent. This resulted into linguistic heterogeneity. Heterogeneity brings speakers of languages together at different workplaces, schools and even places of abode.
- Full Text:
- Date Issued: 2012
- Authors: Mpofu, Nombulelo Patience
- Date: 2012
- Subjects: Xhosa language -- Study and teaching (Secondary) , Port Elizabeth (South Africa) , Effective teaching
- Language: English
- Type: Thesis , Doctoral , DLitt
- Identifier: vital:11840 , http://hdl.handle.net/10353/d1013389 , Xhosa language -- Study and teaching (Secondary) , Port Elizabeth (South Africa) , Effective teaching
- Description: The essential function of a language is communication. Effective communication takes place when speakers understand each other‟s language. Speakers of different languages these days stay with each other. This kind of setting results into multilingualism. Multilingualism refers to the use or maintenance of more than one language in a certain context. In this regard it may refer to the fact that many languages are spoken in South Africa. It serves as a natural solution to the problem of language contact that is extremely widespread throughout South Africa and the world at large. The recognition of the multilingual nature of South African society by the Constitution of this country , as (Made 2010) puts it, necessitates the creation of tools of implementation and redress, in the form of appropriate language policies. Such language policies are designed to correct the universal tendency to practise monolingualism in multilingual societies which disempowers non-mother tongue speakers of the dominant language, to the detriment of both their rights as citizens and in communicative equity in exercising these rights. Many Black South Africans took employment in the industrial centres through urbanization, where they learnt many languages such as Fanakalo, English, Afrikaans and many other languages in the African continent. This resulted into linguistic heterogeneity. Heterogeneity brings speakers of languages together at different workplaces, schools and even places of abode.
- Full Text:
- Date Issued: 2012
An investigation into the antidiabetic and catalytic properties of oxovanadium(IV) complexes
- Authors: Walmsley, Ryan Steven
- Date: 2012
- Subjects: Hypoglycemic agents Ligands (Biochemistry) Complex compounds Potentiometry Proton transfer reactions Stability Imidazoles Vanadium catalysts
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4320 , http://hdl.handle.net/10962/d1004978
- Description: In part 1 of this thesis, the antidiabetic activity of a series of novel oxovanadium(IV) complexes was investigated. A range of bidentate N,O-donor ligands, which partially mimic naturally occurring bioligands, were prepared and reacted with the vanadyl ion to form the corresponding bis-coordinated complexes. Initially, 2-(2ˊ-hydroxyphenyl)-1R-imidazoline (where R = H, ethyl and ethanol) ligands were prepared. The aqueous pH-metric chemical speciation was investigated using glass electrode potentiometry which allowed for the determination of protonation and stability constants of the ligands and complexes, respectively. The species distribution diagrams generated from this information gave an indication of how the complexes might behave across the broad pH range experienced in the digestive and circulatory systems. This information was used to create an improved 2nd generation of ligands that were constructed by combining the imidazole and carboxylic acid functionalities. These corresponding bis[(imidazolyl)carboxylato]-oxovanadium(IV) complexes displayed a broader pH-metric stability. Both sets of complexes improved glucose uptake and reduced coagulation in vitro. In part 2 of this thesis, a range of homogeneous and heterogeneous oxovanadium(IV) catalysts were prepared. Firstly, Merrifield beads were functionalized with ligands from Part 1 and then reacted with vanadyl sulfate to afford the corresponding heterogeneous catalysts. These displayed promising catalytic activity for the peroxide facilitated oxidation of thioanisole, styrene and ethylbenzene as well as the oxidative bromination of phenol red. Smaller imidazole-containing beads with higher surface areas than the Merrifield beads were prepared by suspension polymerization. These beads similarly demonstrated excellent catalytic activity for the oxidation of thioanisole and were highly recyclable. In attempt to increase the exposed catalytic surface area, while retaining the ease of separation achieved in the before mentioned systems, micron to nano sized electrospun fibers containing coordinating ligands were fabricated. The corresponding oxovanadium(IV) functionalized fibers were applied to the oxidation of thioanisole using a continuous flow system. The flexible and porous nature of the fiber mats was well suited to this approach. After optimization of the reactant flow rate and catalyst amount, near quantitative (> 99%) oxidation was achieved for an extended period. In addition, leaching of vanadium was mitigated by modification of the attached ligand or polymer material.
- Full Text:
- Date Issued: 2012
- Authors: Walmsley, Ryan Steven
- Date: 2012
- Subjects: Hypoglycemic agents Ligands (Biochemistry) Complex compounds Potentiometry Proton transfer reactions Stability Imidazoles Vanadium catalysts
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4320 , http://hdl.handle.net/10962/d1004978
- Description: In part 1 of this thesis, the antidiabetic activity of a series of novel oxovanadium(IV) complexes was investigated. A range of bidentate N,O-donor ligands, which partially mimic naturally occurring bioligands, were prepared and reacted with the vanadyl ion to form the corresponding bis-coordinated complexes. Initially, 2-(2ˊ-hydroxyphenyl)-1R-imidazoline (where R = H, ethyl and ethanol) ligands were prepared. The aqueous pH-metric chemical speciation was investigated using glass electrode potentiometry which allowed for the determination of protonation and stability constants of the ligands and complexes, respectively. The species distribution diagrams generated from this information gave an indication of how the complexes might behave across the broad pH range experienced in the digestive and circulatory systems. This information was used to create an improved 2nd generation of ligands that were constructed by combining the imidazole and carboxylic acid functionalities. These corresponding bis[(imidazolyl)carboxylato]-oxovanadium(IV) complexes displayed a broader pH-metric stability. Both sets of complexes improved glucose uptake and reduced coagulation in vitro. In part 2 of this thesis, a range of homogeneous and heterogeneous oxovanadium(IV) catalysts were prepared. Firstly, Merrifield beads were functionalized with ligands from Part 1 and then reacted with vanadyl sulfate to afford the corresponding heterogeneous catalysts. These displayed promising catalytic activity for the peroxide facilitated oxidation of thioanisole, styrene and ethylbenzene as well as the oxidative bromination of phenol red. Smaller imidazole-containing beads with higher surface areas than the Merrifield beads were prepared by suspension polymerization. These beads similarly demonstrated excellent catalytic activity for the oxidation of thioanisole and were highly recyclable. In attempt to increase the exposed catalytic surface area, while retaining the ease of separation achieved in the before mentioned systems, micron to nano sized electrospun fibers containing coordinating ligands were fabricated. The corresponding oxovanadium(IV) functionalized fibers were applied to the oxidation of thioanisole using a continuous flow system. The flexible and porous nature of the fiber mats was well suited to this approach. After optimization of the reactant flow rate and catalyst amount, near quantitative (> 99%) oxidation was achieved for an extended period. In addition, leaching of vanadium was mitigated by modification of the attached ligand or polymer material.
- Full Text:
- Date Issued: 2012
An investigation into the control of audio streaming across networks having diverse quality of service mechanisms
- Authors: Foulkes, Philip James
- Date: 2012
- Subjects: Streaming audio -- Testing Data transmission systems -- Testing Computer networks -- Management Computer networks -- Evaluation Computer network protocols -- Standards
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4607 , http://hdl.handle.net/10962/d1004865
- Description: The transmission of realtime audio data across digital networks is subject to strict quality of service requirements. These networks need to be able to guarantee network resources (e.g., bandwidth), ensure timely and deterministic data delivery, and provide time synchronisation mechanisms to ensure successful transmission of this data. Two open standards-based networking technologies, namely IEEE 1394 and the recently standardised Ethernet AVB, provide distinct methods for achieving these goals. Audio devices that are compatible with IEEE 1394 networks exist, and audio devices that are compatible with Ethernet AVB networks are starting to come onto the market. There is a need for mechanisms to provide compatibility between the audio devices that reside on these disparate networks such that existing IEEE 1394 audio devices are able to communicate with Ethernet AVB audio devices, and vice versa. The audio devices that reside on these networks may be remotely controlled by a diverse set of incompatible command and control protocols. It is desirable to have a common network-neutral method of control over the various parameters of the devices that reside on these networks. As part of this study, two Ethernet AVB systems were developed. One system acts as an Ethernet AVB audio endpoint device and another system acts as an audio gateway between IEEE 1394 and Ethernet AVB networks. These systems, along with existing IEEE 1394 audio devices, were used to demonstrate the ability to transfer audio data between the networking technologies. Each of the devices is remotely controllable via a network neutral command and control protocol, XFN. The IEEE 1394 and Ethernet AVB devices are used to demonstrate the use of the XFN protocol to allow for network neutral connection management to take place between IEEE 1394 and Ethernet AVB networks. User control over these diverse devices is achieved via the use of a graphical patchbay application, which aims to provide a consistent user interface to a diverse range of devices.
- Full Text:
- Date Issued: 2012
- Authors: Foulkes, Philip James
- Date: 2012
- Subjects: Streaming audio -- Testing Data transmission systems -- Testing Computer networks -- Management Computer networks -- Evaluation Computer network protocols -- Standards
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4607 , http://hdl.handle.net/10962/d1004865
- Description: The transmission of realtime audio data across digital networks is subject to strict quality of service requirements. These networks need to be able to guarantee network resources (e.g., bandwidth), ensure timely and deterministic data delivery, and provide time synchronisation mechanisms to ensure successful transmission of this data. Two open standards-based networking technologies, namely IEEE 1394 and the recently standardised Ethernet AVB, provide distinct methods for achieving these goals. Audio devices that are compatible with IEEE 1394 networks exist, and audio devices that are compatible with Ethernet AVB networks are starting to come onto the market. There is a need for mechanisms to provide compatibility between the audio devices that reside on these disparate networks such that existing IEEE 1394 audio devices are able to communicate with Ethernet AVB audio devices, and vice versa. The audio devices that reside on these networks may be remotely controlled by a diverse set of incompatible command and control protocols. It is desirable to have a common network-neutral method of control over the various parameters of the devices that reside on these networks. As part of this study, two Ethernet AVB systems were developed. One system acts as an Ethernet AVB audio endpoint device and another system acts as an audio gateway between IEEE 1394 and Ethernet AVB networks. These systems, along with existing IEEE 1394 audio devices, were used to demonstrate the ability to transfer audio data between the networking technologies. Each of the devices is remotely controllable via a network neutral command and control protocol, XFN. The IEEE 1394 and Ethernet AVB devices are used to demonstrate the use of the XFN protocol to allow for network neutral connection management to take place between IEEE 1394 and Ethernet AVB networks. User control over these diverse devices is achieved via the use of a graphical patchbay application, which aims to provide a consistent user interface to a diverse range of devices.
- Full Text:
- Date Issued: 2012
An investigation into the impact of fairtrade in South Africa
- Authors: Jari, Bridget
- Date: 2012
- Subjects: Competition, Unfair -- Research -- South Africa Price maintenance -- Research -- South Africa Fair trade associations -- South Africa Sustainable development -- Africa, Southern
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1006 , http://hdl.handle.net/10962/d1002741
- Description: World international trade is moving towards more free trade, through globalization and trade liberalization. These moves are guided by trade theories which state that on an aggregated level, nations involved in free trade should benefit, and further that free trade is fair. However, in practice, contradictory views have been raised, stating that free trade may not necessarily be benefiting all participants equally. Rather, other nations, especially developing nations, have become worse-off after opening up their markets for free trade. On the other hand, many developed nations have benefited substantially from free trade. Among other factors, the difference in benefits is believed to have been influenced by the types of commodities being traded (where developing nations mainly trade in primary goods and developed nations in anufactured goods) and unequal power relations (some nations for example, the EU and the US, still adopt protectionism in their agricultural sector). In order to address market imbalances resulting from free trade, Fairtrade has arisen. Fairtrade aims to improve international trading conditions in order to benefit small-scale farmers and farm workers in the developing nations. The Fairtrade organization further claims that its principles are in line with sustainable development. However, Fairtrade suffers a credibility gap because there is a lack of independent research to support their claims. To date in South Africa, there is little research examining the claims of the Fairtrade organization. In order to contribute to the Fairtrade discussion in South Africa, this study has investigated the validity of Fairtrade‘s claims that it contributes towards sustainable development. The study utilised primary data, which was collected from ten commercial farms and two small-scale farmer cooperatives located in the Eastern Cape and Western Cape provinces that are/were Fairtrade certified. The main reason for including commercial farmers and small-scale farmer cooperatives in the study was for comparing relative impacts in the two Fairtrade structures. The data was then analysed using a sustainable livelihoods framework, which was developed in the study. The study focussed on investigating the impact of Fairtrade tools, which are minimum prices, premiums, pre-financing and support for long-term relationships, on its intended beneficiaries. Minimum prices offered to producers cover production costs and are above market prices, and Fairtrade premiums are to be invested in developmental projects. Therefore, examining the influence of Fairtrade tools on individuals and communities provides an overview of how Fairtrade influences development. The results of the study show that sampled Fairtrade beneficiaries in South Africa have witnessed substantial positive changes as a result of Fairtrade. The Fairtrade initiative has managed to empower small-scale producers and farm workers, as well as leverage development opportunities for their wider communities. It has supported organizational development in the supply chain, facilitated investment in community development projects and in business-related training. Producers, both commercial and small-scale producers, managed to access a market that offers stable prices, and have gained from minimum prices. Furthermore, small-scale farmers have been allowed an opportunity to expand their business into export markets, and enjoyed an increase in incomes. Fairtrade benefits further trickle down to non-Fairtrade community members, in the form of employment creation and community development. Despite positive effects, Fairtrade producers faced challenges, including high Fairtrade administration costs and a small market for Fairtrade commodities. The study concludes that in the face of challenges, Fairtrade brings economic, social and environmental benefits, but as compared to economic and social development, the impact on environmental development is rather limited. Even though that is the case, Fairtrade offers valuable development opportunities to producers in South Africa.
- Full Text:
- Date Issued: 2012
- Authors: Jari, Bridget
- Date: 2012
- Subjects: Competition, Unfair -- Research -- South Africa Price maintenance -- Research -- South Africa Fair trade associations -- South Africa Sustainable development -- Africa, Southern
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1006 , http://hdl.handle.net/10962/d1002741
- Description: World international trade is moving towards more free trade, through globalization and trade liberalization. These moves are guided by trade theories which state that on an aggregated level, nations involved in free trade should benefit, and further that free trade is fair. However, in practice, contradictory views have been raised, stating that free trade may not necessarily be benefiting all participants equally. Rather, other nations, especially developing nations, have become worse-off after opening up their markets for free trade. On the other hand, many developed nations have benefited substantially from free trade. Among other factors, the difference in benefits is believed to have been influenced by the types of commodities being traded (where developing nations mainly trade in primary goods and developed nations in anufactured goods) and unequal power relations (some nations for example, the EU and the US, still adopt protectionism in their agricultural sector). In order to address market imbalances resulting from free trade, Fairtrade has arisen. Fairtrade aims to improve international trading conditions in order to benefit small-scale farmers and farm workers in the developing nations. The Fairtrade organization further claims that its principles are in line with sustainable development. However, Fairtrade suffers a credibility gap because there is a lack of independent research to support their claims. To date in South Africa, there is little research examining the claims of the Fairtrade organization. In order to contribute to the Fairtrade discussion in South Africa, this study has investigated the validity of Fairtrade‘s claims that it contributes towards sustainable development. The study utilised primary data, which was collected from ten commercial farms and two small-scale farmer cooperatives located in the Eastern Cape and Western Cape provinces that are/were Fairtrade certified. The main reason for including commercial farmers and small-scale farmer cooperatives in the study was for comparing relative impacts in the two Fairtrade structures. The data was then analysed using a sustainable livelihoods framework, which was developed in the study. The study focussed on investigating the impact of Fairtrade tools, which are minimum prices, premiums, pre-financing and support for long-term relationships, on its intended beneficiaries. Minimum prices offered to producers cover production costs and are above market prices, and Fairtrade premiums are to be invested in developmental projects. Therefore, examining the influence of Fairtrade tools on individuals and communities provides an overview of how Fairtrade influences development. The results of the study show that sampled Fairtrade beneficiaries in South Africa have witnessed substantial positive changes as a result of Fairtrade. The Fairtrade initiative has managed to empower small-scale producers and farm workers, as well as leverage development opportunities for their wider communities. It has supported organizational development in the supply chain, facilitated investment in community development projects and in business-related training. Producers, both commercial and small-scale producers, managed to access a market that offers stable prices, and have gained from minimum prices. Furthermore, small-scale farmers have been allowed an opportunity to expand their business into export markets, and enjoyed an increase in incomes. Fairtrade benefits further trickle down to non-Fairtrade community members, in the form of employment creation and community development. Despite positive effects, Fairtrade producers faced challenges, including high Fairtrade administration costs and a small market for Fairtrade commodities. The study concludes that in the face of challenges, Fairtrade brings economic, social and environmental benefits, but as compared to economic and social development, the impact on environmental development is rather limited. Even though that is the case, Fairtrade offers valuable development opportunities to producers in South Africa.
- Full Text:
- Date Issued: 2012
An investigation of persistence of rural poverty in South Africa: the case of O.R. Tambo district municipality
- Authors: Kongwa, Kekelwa Samuele
- Date: 2012
- Language: English
- Type: Thesis , Doctoral , PhD (Social Science Dev)
- Identifier: vital:11443 , http://hdl.handle.net/10353/d1007577
- Description: The purpose of this study was an investigation of the reasons for persistent poverty and low level of economic growth and development in the OR Tambo district municipality of the Eastern Cape Province since the advent of democracy in South Africa. To accomplish this objective, a case study of the OR Tambo district municipality was undertaken within the concept of development, seeking to answer three research questions: What are the factors that explain the persistence of poverty in the OR Tambo district municipality? Why is the OR Tambo district municipality the most exposed to poverty in relative and absolute terms? What have state poverty intervention strategies done to alleviate poverty in the OR Tambo district since the advent of democracy in South Africa? Mainly qualitative data collection methods, involving in-depth semi-structured interviews, textual and document analyses, focus group discussions and observations were employed to answer the research questions. A purposive sampling of nineteen participants, supplemented by three focus groups, was selected. The macro-level case study design was supplemented by micro-level documentary evidence on poverty and development. From the synthesised findings of the investigation, twelve causal factors were identified as responsible for persistent poverty and low level of economic growth and development in the OR Tambo district. These included political neglect, agricultural neglect, poor infrastructure, corruption, poor service delivery, poor quality of natural resources, brain drain, migrant labour system, culture of tolerance and conservatism, culture of dependence, no long-term development strategy and globalisation.
- Full Text:
- Date Issued: 2012
- Authors: Kongwa, Kekelwa Samuele
- Date: 2012
- Language: English
- Type: Thesis , Doctoral , PhD (Social Science Dev)
- Identifier: vital:11443 , http://hdl.handle.net/10353/d1007577
- Description: The purpose of this study was an investigation of the reasons for persistent poverty and low level of economic growth and development in the OR Tambo district municipality of the Eastern Cape Province since the advent of democracy in South Africa. To accomplish this objective, a case study of the OR Tambo district municipality was undertaken within the concept of development, seeking to answer three research questions: What are the factors that explain the persistence of poverty in the OR Tambo district municipality? Why is the OR Tambo district municipality the most exposed to poverty in relative and absolute terms? What have state poverty intervention strategies done to alleviate poverty in the OR Tambo district since the advent of democracy in South Africa? Mainly qualitative data collection methods, involving in-depth semi-structured interviews, textual and document analyses, focus group discussions and observations were employed to answer the research questions. A purposive sampling of nineteen participants, supplemented by three focus groups, was selected. The macro-level case study design was supplemented by micro-level documentary evidence on poverty and development. From the synthesised findings of the investigation, twelve causal factors were identified as responsible for persistent poverty and low level of economic growth and development in the OR Tambo district. These included political neglect, agricultural neglect, poor infrastructure, corruption, poor service delivery, poor quality of natural resources, brain drain, migrant labour system, culture of tolerance and conservatism, culture of dependence, no long-term development strategy and globalisation.
- Full Text:
- Date Issued: 2012
An investigation of strategies used by Ndebele translators in Zimbabwe in translating HIV/AIDS texts: a corpus-based approach
- Authors: Ndhlovu, Ketiwe
- Date: 2012
- Subjects: Translating and interpreting -- Zimbabwe , Corpora (Linguistics) , Culture -- Study and teaching -- Zimbabwe , Translators -- Zimbabwe , HIV infections -- Zimbabwe , AIDS (Disease) -- Zimbabwe , Taboo, Linguistic , Ndebele (African people) -- Social life and customs
- Language: English
- Type: Thesis , Doctoral , PhD (African Languages)
- Identifier: vital:11149 , http://hdl.handle.net/10353/524 , Translating and interpreting -- Zimbabwe , Corpora (Linguistics) , Culture -- Study and teaching -- Zimbabwe , Translators -- Zimbabwe , HIV infections -- Zimbabwe , AIDS (Disease) -- Zimbabwe , Taboo, Linguistic , Ndebele (African people) -- Social life and customs
- Description: In Zimbabwe, translation studies is yet to be recognized as a discipline worthy of study in its own right, hence, not much research has been carried out into the theory and practice of translation. Furthermore, there is no tertiary institution that offers professional translation courses. In light of this information most translations are carried out by untrained/partially trained translators with only a few translators who have gained experience over time. The aim of this study was to investigate strategies used by Ndebele translators in the translation of specialized terms and cultural taboos in selected HIV/AIDS texts, as well as factors that can be used to improve the translation situation of Zimbabwe. Three main theoretical approaches were used in a complementary fashion, namely Descriptive Translation Studies (DTS), Cultural Studies and Corpus-based Translation Studies (CTS). DTS provided the researcher with a theory to understand the Ndebele translations in their wider environment; Cultural Studies provided the researcher with the means by which to understand Ndebele culture and taboos; Corpus-based Translation Studies (CTS) provided the researcher with the methodological tools and analytical techniques to analyse the corpus of texts. An English-Ndebele Parallel Corpus (ENPC) was created using fourteen English source texts and their corresponding Ndebele translations. The ENPC was interrogated by means of ParaConc, a parallel concordancing program. The study found that when translating specialised terms, Ndebele translators used strategies such as a general or neutral word, cultural substitution, paraphrasing and omission. The strategy of omission was misused in most cases because Ndebele translators omitted valuable information which did not reach the target readers. With regards to translation strategies that contributed to term creation, it was found that Ndebele translators relied on external as well as internal resources. The translators used strategies such as pure loan words; pure loan words preceeded by an explanation and indigenised loan words. From the Ndebele language itself, the translators resorted to semantic shift, compounding, coinage and paraphrasing, among others. From the ENPC it is clear that Ndebele translators did manage to transfer the message from English to Ndebele to an extent. However, the ENPC has to be used with caution by other researchers since the translations included in the corpus are full of errors such as misinterpretations of the source texts, mistranslations, incorrect terms and incorrect orthography. This factor points to a dire need to establish translation as an academic discipline and profession in Zimbabwe so as to elevate the quality of translations and offer better translation services to all users.
- Full Text:
- Date Issued: 2012
- Authors: Ndhlovu, Ketiwe
- Date: 2012
- Subjects: Translating and interpreting -- Zimbabwe , Corpora (Linguistics) , Culture -- Study and teaching -- Zimbabwe , Translators -- Zimbabwe , HIV infections -- Zimbabwe , AIDS (Disease) -- Zimbabwe , Taboo, Linguistic , Ndebele (African people) -- Social life and customs
- Language: English
- Type: Thesis , Doctoral , PhD (African Languages)
- Identifier: vital:11149 , http://hdl.handle.net/10353/524 , Translating and interpreting -- Zimbabwe , Corpora (Linguistics) , Culture -- Study and teaching -- Zimbabwe , Translators -- Zimbabwe , HIV infections -- Zimbabwe , AIDS (Disease) -- Zimbabwe , Taboo, Linguistic , Ndebele (African people) -- Social life and customs
- Description: In Zimbabwe, translation studies is yet to be recognized as a discipline worthy of study in its own right, hence, not much research has been carried out into the theory and practice of translation. Furthermore, there is no tertiary institution that offers professional translation courses. In light of this information most translations are carried out by untrained/partially trained translators with only a few translators who have gained experience over time. The aim of this study was to investigate strategies used by Ndebele translators in the translation of specialized terms and cultural taboos in selected HIV/AIDS texts, as well as factors that can be used to improve the translation situation of Zimbabwe. Three main theoretical approaches were used in a complementary fashion, namely Descriptive Translation Studies (DTS), Cultural Studies and Corpus-based Translation Studies (CTS). DTS provided the researcher with a theory to understand the Ndebele translations in their wider environment; Cultural Studies provided the researcher with the means by which to understand Ndebele culture and taboos; Corpus-based Translation Studies (CTS) provided the researcher with the methodological tools and analytical techniques to analyse the corpus of texts. An English-Ndebele Parallel Corpus (ENPC) was created using fourteen English source texts and their corresponding Ndebele translations. The ENPC was interrogated by means of ParaConc, a parallel concordancing program. The study found that when translating specialised terms, Ndebele translators used strategies such as a general or neutral word, cultural substitution, paraphrasing and omission. The strategy of omission was misused in most cases because Ndebele translators omitted valuable information which did not reach the target readers. With regards to translation strategies that contributed to term creation, it was found that Ndebele translators relied on external as well as internal resources. The translators used strategies such as pure loan words; pure loan words preceeded by an explanation and indigenised loan words. From the Ndebele language itself, the translators resorted to semantic shift, compounding, coinage and paraphrasing, among others. From the ENPC it is clear that Ndebele translators did manage to transfer the message from English to Ndebele to an extent. However, the ENPC has to be used with caution by other researchers since the translations included in the corpus are full of errors such as misinterpretations of the source texts, mistranslations, incorrect terms and incorrect orthography. This factor points to a dire need to establish translation as an academic discipline and profession in Zimbabwe so as to elevate the quality of translations and offer better translation services to all users.
- Full Text:
- Date Issued: 2012
Antibacterial and phytochemical studies of selected South African honeys on clinical isolates of Helicobacter pylori
- Authors: Manyi-Loh, Christy E
- Date: 2012
- Subjects: Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Microbiology)
- Identifier: vital:11240 , http://hdl.handle.net/10353/d1001056 , Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Description: Infection with Helicobacter pylori has been associated with the pathogenesis of numerous stomach and gastroduodenal diseases that pose threats to public health. Eradicaftion of this pathogen is a global challenge due to its alarming rate of multidrug resistance. Consequently, to find an alternative treatment, the search is increasingly focused on new antimicrobial product from natural sources including honey. Honey has been used as medicine in several cultures since ancient time due to its enormous biomedical activities. Its beneficial qualities have been endorsed to its antimicrobial, antioxidant, anti-inflammatory properties added to its phytocomponents. In this study, the anti-H. pylori activity of South African honeys and their solvent extracts as well as the phytochemicals present in the two most active honeys were evaluated. Agar well diffusion test was used to investigate the antimicrobial activity of six honey varieties obtained from different locations in the country. Subsequently, the honeys were extracted with four organic solvents viz n-hexane, diethyl ether, chloroform and ethyl acetate employed in order of increasing polarity. The antibacterial activity of the different solvent extracts of each honey was evaluated by agar well diffusion; broth micro dilution and time kill assays. Different chromatographic techniques (Thin layer & column chromatography) were employed to enumerate the phytochemical constituents in the most active solvent extracts of Pure Honey (PH) and Champagne Royal Train (CRT); and were identified by gas-chromatography linked mass-spectrometry. Linalool pure compound was equally evaluated for anti-H. pylori activity in a bid to trace the antibacterial agent among the variety of compounds identified. Data were analyzed by One-way ANOVA test at 95% confidence interval. Crude honeys and their solvent extracts demonstrated potent anti-H. pylori activity with zone diameter that ranged from [16.0mm (crude) to 22.2mm (extract)] and percentage susceptibilities of test isolates between 73.3% (crude) and 93.3% (extract). The chloroform extracts of PH and CRT were most active with MIC50 in the ranges 0.01- viii 10%v/v and 0.625-10%v/v respectively, not significantly different from amoxicillin (P> 0.05); and efficient bactericidal activity (100% bacterial cells killed) at 1/2MIC and 4xMIC over different time intervals, 36-72hrs and 18-72hrs respectively. The appearance of bands on the thin layer chromatography (TLC) chromatogram spotted with the chloroform extracts of PH and CRT; and developed with hexane: ethyl acetate: acetic acid (HEA) and methanol: acetic acid: water (MAAW) solvent systems indicated the presence of compounds. Purification of the compounds contained in these extracts over silica gel column yielded numerous fractions which were evaluated for antibacterial activity and purity. PHF5 was the most active fraction with a mean MIC50 value of 1.25mg/mL. Volatile compounds belonging to different known chemical families in honey were identified in all the active fractions obtained from PH. Conversely, only four compounds were identified in the active fractions obtained from CRT hence the non volatile constituents could be of prime relevance with respect to antibacterial activity of this honey. Of novelty was the presence of thiophene and N-methyl-D3-azirdine compounds, essential precursors used for the synthesis of natural products and pharmaceuticals with vital biomedical properties. Linalool demonstrated potent inhibitory (MIC95, 0.002- 0.0313mg/mL) and bactericidal activity (0.0039-0.313mg/mL) against the test isolates. On the other hand, a significant difference was recorded (P < 0.05) in comparing the activity of linalool compound to the fractions. PH could serve as a good economic source of bioactive compounds which could be employed as template for the synthesis of novel anti-H. pylori drugs. However, further studies are needed to determine the non volatile active ingredients in PH and CRT as well as toxicological testing
- Full Text:
- Date Issued: 2012
- Authors: Manyi-Loh, Christy E
- Date: 2012
- Subjects: Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Microbiology)
- Identifier: vital:11240 , http://hdl.handle.net/10353/d1001056 , Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Description: Infection with Helicobacter pylori has been associated with the pathogenesis of numerous stomach and gastroduodenal diseases that pose threats to public health. Eradicaftion of this pathogen is a global challenge due to its alarming rate of multidrug resistance. Consequently, to find an alternative treatment, the search is increasingly focused on new antimicrobial product from natural sources including honey. Honey has been used as medicine in several cultures since ancient time due to its enormous biomedical activities. Its beneficial qualities have been endorsed to its antimicrobial, antioxidant, anti-inflammatory properties added to its phytocomponents. In this study, the anti-H. pylori activity of South African honeys and their solvent extracts as well as the phytochemicals present in the two most active honeys were evaluated. Agar well diffusion test was used to investigate the antimicrobial activity of six honey varieties obtained from different locations in the country. Subsequently, the honeys were extracted with four organic solvents viz n-hexane, diethyl ether, chloroform and ethyl acetate employed in order of increasing polarity. The antibacterial activity of the different solvent extracts of each honey was evaluated by agar well diffusion; broth micro dilution and time kill assays. Different chromatographic techniques (Thin layer & column chromatography) were employed to enumerate the phytochemical constituents in the most active solvent extracts of Pure Honey (PH) and Champagne Royal Train (CRT); and were identified by gas-chromatography linked mass-spectrometry. Linalool pure compound was equally evaluated for anti-H. pylori activity in a bid to trace the antibacterial agent among the variety of compounds identified. Data were analyzed by One-way ANOVA test at 95% confidence interval. Crude honeys and their solvent extracts demonstrated potent anti-H. pylori activity with zone diameter that ranged from [16.0mm (crude) to 22.2mm (extract)] and percentage susceptibilities of test isolates between 73.3% (crude) and 93.3% (extract). The chloroform extracts of PH and CRT were most active with MIC50 in the ranges 0.01- viii 10%v/v and 0.625-10%v/v respectively, not significantly different from amoxicillin (P> 0.05); and efficient bactericidal activity (100% bacterial cells killed) at 1/2MIC and 4xMIC over different time intervals, 36-72hrs and 18-72hrs respectively. The appearance of bands on the thin layer chromatography (TLC) chromatogram spotted with the chloroform extracts of PH and CRT; and developed with hexane: ethyl acetate: acetic acid (HEA) and methanol: acetic acid: water (MAAW) solvent systems indicated the presence of compounds. Purification of the compounds contained in these extracts over silica gel column yielded numerous fractions which were evaluated for antibacterial activity and purity. PHF5 was the most active fraction with a mean MIC50 value of 1.25mg/mL. Volatile compounds belonging to different known chemical families in honey were identified in all the active fractions obtained from PH. Conversely, only four compounds were identified in the active fractions obtained from CRT hence the non volatile constituents could be of prime relevance with respect to antibacterial activity of this honey. Of novelty was the presence of thiophene and N-methyl-D3-azirdine compounds, essential precursors used for the synthesis of natural products and pharmaceuticals with vital biomedical properties. Linalool demonstrated potent inhibitory (MIC95, 0.002- 0.0313mg/mL) and bactericidal activity (0.0039-0.313mg/mL) against the test isolates. On the other hand, a significant difference was recorded (P < 0.05) in comparing the activity of linalool compound to the fractions. PH could serve as a good economic source of bioactive compounds which could be employed as template for the synthesis of novel anti-H. pylori drugs. However, further studies are needed to determine the non volatile active ingredients in PH and CRT as well as toxicological testing
- Full Text:
- Date Issued: 2012
Assessing the effect of a laundry detergent ingredient (LAS) on organisms of a rural South African river
- Authors: Gordon, Andrew K
- Date: 2012
- Subjects: Detergent pollution of rivers, lakes, etc. -- Research -- South Africa -- Eastern Cape Water -- Pollution -- Research -- South Africa -- Eastern Cape Stream health -- Research -- South Africa -- Eastern Cape Stream ecology -- Research -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6042 , http://hdl.handle.net/10962/d1006201
- Description: Powdered laundry detergents are consumed in high volumes worldwide. Post use, they are directed toward water resources via wastewater treatment works or, as is the situation in many rural areas of South Africa, they enter the environment directly as a result of laundry washing activity undertaken alongside surface waters. Within wastewater treatment works, the main ingredient in powdered laundry detergents, the narcotic toxin linear alkylbenzene sulfonate (LAS), is mostly removed, rendering the waste stream a negligible risk to the aquatic biota of receiving waters. In contrast, the biological and ecological impacts of direct LAS input to the aquatic environment, as a consequence of near-stream laundry washing, are yet to be fully realised. Consequently, this thesis posed two research questions: 1) 'What are the LAS concentrations in a small rural South African river'? and 2) 'Is the in-stream biological community negatively affected at these concentrations?' The chosen study area, the community of Balfour in the Eastern Cape Province, is like many rural areas of South Africa where inadequate provision of piped water to homesteads necessitates laundry washing alongside the nearby Balfour River. The first research question was addressed in two ways: by predicting LAS concentrations in Balfour River water by assessing detergent consumption and laundry washing behaviour of residents living alongside the river; and measuring actual in- stream LAS concentrations on different days of the week and during different seasons. Results indicated that LAS concentrations were highly variable temporally and spatially. High peak concentrations of LAS occurred infrequently and were limited to the immediate vicinity of near-stream laundry washing activity with the highest measured concentration being 342 μg.L ⁻¹ and the average 21 μg.L ⁻¹ over the sampling period. The second research question was addressed by integrating the chemical evidence, determined from the first research question, with the biological evidence of stress responses measured in macroinvertebrates collected downstream of near-stream laundry washing activity on the Balfour River. Predicted and measured LAS exposure concentrations from the Balfour River were compared to a water quality guideline for LAS (304 μg.L ⁻¹), specifically derived in this thesis. Biological stress responses were measured at different levels of organisation: two sub-cellular responses (lipid peroxidation and cholinesterase activity); three measures of macroinvertebrate tolerance to water quality impairment; five measures of community composition; three measures of community richness; and a surrogate measure of ecosystem function (functional feeding groups). Weight-of-evidence methodology was utilised to assess, integrate and interpret the chemical and biological evidence, and at its conclusion, determined no effect on the in-stream biological community of the Balfour River downstream of laundry washing activity.
- Full Text:
- Date Issued: 2012
- Authors: Gordon, Andrew K
- Date: 2012
- Subjects: Detergent pollution of rivers, lakes, etc. -- Research -- South Africa -- Eastern Cape Water -- Pollution -- Research -- South Africa -- Eastern Cape Stream health -- Research -- South Africa -- Eastern Cape Stream ecology -- Research -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6042 , http://hdl.handle.net/10962/d1006201
- Description: Powdered laundry detergents are consumed in high volumes worldwide. Post use, they are directed toward water resources via wastewater treatment works or, as is the situation in many rural areas of South Africa, they enter the environment directly as a result of laundry washing activity undertaken alongside surface waters. Within wastewater treatment works, the main ingredient in powdered laundry detergents, the narcotic toxin linear alkylbenzene sulfonate (LAS), is mostly removed, rendering the waste stream a negligible risk to the aquatic biota of receiving waters. In contrast, the biological and ecological impacts of direct LAS input to the aquatic environment, as a consequence of near-stream laundry washing, are yet to be fully realised. Consequently, this thesis posed two research questions: 1) 'What are the LAS concentrations in a small rural South African river'? and 2) 'Is the in-stream biological community negatively affected at these concentrations?' The chosen study area, the community of Balfour in the Eastern Cape Province, is like many rural areas of South Africa where inadequate provision of piped water to homesteads necessitates laundry washing alongside the nearby Balfour River. The first research question was addressed in two ways: by predicting LAS concentrations in Balfour River water by assessing detergent consumption and laundry washing behaviour of residents living alongside the river; and measuring actual in- stream LAS concentrations on different days of the week and during different seasons. Results indicated that LAS concentrations were highly variable temporally and spatially. High peak concentrations of LAS occurred infrequently and were limited to the immediate vicinity of near-stream laundry washing activity with the highest measured concentration being 342 μg.L ⁻¹ and the average 21 μg.L ⁻¹ over the sampling period. The second research question was addressed by integrating the chemical evidence, determined from the first research question, with the biological evidence of stress responses measured in macroinvertebrates collected downstream of near-stream laundry washing activity on the Balfour River. Predicted and measured LAS exposure concentrations from the Balfour River were compared to a water quality guideline for LAS (304 μg.L ⁻¹), specifically derived in this thesis. Biological stress responses were measured at different levels of organisation: two sub-cellular responses (lipid peroxidation and cholinesterase activity); three measures of macroinvertebrate tolerance to water quality impairment; five measures of community composition; three measures of community richness; and a surrogate measure of ecosystem function (functional feeding groups). Weight-of-evidence methodology was utilised to assess, integrate and interpret the chemical and biological evidence, and at its conclusion, determined no effect on the in-stream biological community of the Balfour River downstream of laundry washing activity.
- Full Text:
- Date Issued: 2012
Assessing the impacts of invasive non-native African sharptooth catfish Clarias Gariepinus
- Authors: Kadye, Wilbert Takawira
- Date: 2012
- Subjects: Catfishes -- South Africa -- Eastern Cape Biological invasions -- South Africa -- Great Fish River Biological invasions -- South Africa -- Sundays River Clarias gariepinus Freshwater ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5227 , http://hdl.handle.net/10962/d1005070
- Description: Invasive species are of particular concern as they have the potential to alter community structure and food web relationships within their invaded habitats. African sharptooth catfish Clarias gariepinus, a generalist predator, was introduced through an inter-basin water transfer scheme into the Great Fish and Sundays Rivers, Eastern Cape, South Africa, where it threatens the native riverine biota. This thesis assessed its impact from a trophic perspective. Patterns in catfish distribution and abundance revealed an upstream to downstream gradient that was associated with spatial distribution of most species within the mainstream, and a mainstream to tributary gradient that was associated with the spatial distribution of native minnows. The catfish was predicted to occur widely within the mainstem habitats and to decrease progressively along the mainstrem to tributary gradient with the physico-chemical environment being a good proxy for predicting both its occurrence and abundance. The results suggest the catfish proliferated within mainstem habitats where invasion resistance was possibly reduced due to alteration of flow. Population dynamics and size structuring of two native cyprinid minnows Pseudobarbus afer and Barbus anoplus, threatened by catfish, were examined within uninvaded headwater streams in relation to their proximate physical habitats. Their habitats were characterised by seasonal variation in physico-chemical conditions and a spatial variation in substrata compositions. No evidence of differences was found between seasons for density and capture probability for either species. The population size and density for P. afer was found to increase with increasing proportion of boulders. In comparison, B. anoplus population size and probability of capture increased with increasing proportion of bedrock and bank vegetation, respectively. Size structuring was explained predominantly by seasonality and habitat variables for P. afer and B. anoplus, respectively. Stable isotope ratios of carbon and nitrogen were used to compare the spatial variation in both the community-wide and catfish-specific niches and to estimate catfish prey sources from different habitats within the invaded systems. Aquatic community and catfish niches were statistically different among localities, suggesting that each locality had a distinct community-wide trophic structure. Dispersion metrics indicated no evidence of differences in the clustering among individuals, but provided evidence of differences in path trajectories for the comparisons of catfish populations that suggested dietary plasticity within different localities. Dietary studies revealed both ontogenetic shift and omnivory that suggested that catfish may exhibit less pronounced top-down effects within its invaded habitats. Manipulative experiments were used to test the response of benthic macroinvertebrates within two rivers that were differentially impacted by catfish as a presstype disturbance. Macroinvertebrates were non-responsive to catfish presence within a system where catfish had previously been established. In contrast, excluding catfish in this system indicated a response that suggested the importance of refuge within invaded habitats and the possible recovery pattern of certain macroinvertebrate taxa. By comparison, introduction of catfish within previously uninvaded localities provided evidence of direct catfish impact through elimination of conspicuous taxa. Acoustic telemetry was used to investigate catfish movement patterns within an invaded lentic habitat and provided evidence that habitat utilisation was non-random. The shallow and structured river mouth habitat, which was most utilised, was probably the most ideal for its breeding and feeding. This inferred potential overlap with native species and suggested the risk of predation and competitive interference. Catfish also exhibited both nocturnal and diurnal activity patterns that were probably related to feeding.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert Takawira
- Date: 2012
- Subjects: Catfishes -- South Africa -- Eastern Cape Biological invasions -- South Africa -- Great Fish River Biological invasions -- South Africa -- Sundays River Clarias gariepinus Freshwater ecology
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5227 , http://hdl.handle.net/10962/d1005070
- Description: Invasive species are of particular concern as they have the potential to alter community structure and food web relationships within their invaded habitats. African sharptooth catfish Clarias gariepinus, a generalist predator, was introduced through an inter-basin water transfer scheme into the Great Fish and Sundays Rivers, Eastern Cape, South Africa, where it threatens the native riverine biota. This thesis assessed its impact from a trophic perspective. Patterns in catfish distribution and abundance revealed an upstream to downstream gradient that was associated with spatial distribution of most species within the mainstream, and a mainstream to tributary gradient that was associated with the spatial distribution of native minnows. The catfish was predicted to occur widely within the mainstem habitats and to decrease progressively along the mainstrem to tributary gradient with the physico-chemical environment being a good proxy for predicting both its occurrence and abundance. The results suggest the catfish proliferated within mainstem habitats where invasion resistance was possibly reduced due to alteration of flow. Population dynamics and size structuring of two native cyprinid minnows Pseudobarbus afer and Barbus anoplus, threatened by catfish, were examined within uninvaded headwater streams in relation to their proximate physical habitats. Their habitats were characterised by seasonal variation in physico-chemical conditions and a spatial variation in substrata compositions. No evidence of differences was found between seasons for density and capture probability for either species. The population size and density for P. afer was found to increase with increasing proportion of boulders. In comparison, B. anoplus population size and probability of capture increased with increasing proportion of bedrock and bank vegetation, respectively. Size structuring was explained predominantly by seasonality and habitat variables for P. afer and B. anoplus, respectively. Stable isotope ratios of carbon and nitrogen were used to compare the spatial variation in both the community-wide and catfish-specific niches and to estimate catfish prey sources from different habitats within the invaded systems. Aquatic community and catfish niches were statistically different among localities, suggesting that each locality had a distinct community-wide trophic structure. Dispersion metrics indicated no evidence of differences in the clustering among individuals, but provided evidence of differences in path trajectories for the comparisons of catfish populations that suggested dietary plasticity within different localities. Dietary studies revealed both ontogenetic shift and omnivory that suggested that catfish may exhibit less pronounced top-down effects within its invaded habitats. Manipulative experiments were used to test the response of benthic macroinvertebrates within two rivers that were differentially impacted by catfish as a presstype disturbance. Macroinvertebrates were non-responsive to catfish presence within a system where catfish had previously been established. In contrast, excluding catfish in this system indicated a response that suggested the importance of refuge within invaded habitats and the possible recovery pattern of certain macroinvertebrate taxa. By comparison, introduction of catfish within previously uninvaded localities provided evidence of direct catfish impact through elimination of conspicuous taxa. Acoustic telemetry was used to investigate catfish movement patterns within an invaded lentic habitat and provided evidence that habitat utilisation was non-random. The shallow and structured river mouth habitat, which was most utilised, was probably the most ideal for its breeding and feeding. This inferred potential overlap with native species and suggested the risk of predation and competitive interference. Catfish also exhibited both nocturnal and diurnal activity patterns that were probably related to feeding.
- Full Text:
- Date Issued: 2012
Bayliss-Hillman adducts as scaffolds for the construction of novel compounds with medicinal potential
- Authors: Idahosa, Kenudi Christiana
- Date: 2012
- Subjects: Antimalarials -- Research Malaria -- Chemotherapy -- Research AIDS (Disease) -- Treatment -- Research AIDS (Disease) -- Chemotherapy -- Research
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4410 , http://hdl.handle.net/10962/d1006763
- Description: This project has focused on exploring the application of Baylis-Hillman (BH) {a.k.a. Morita-Baylis-Hillman (MBH)} scaffolds in the construction of various compounds with medicinal potential. A series of 2-nitrobenzaldehydes has been treated under BH conditions, with two different activated alkenes, viz., (MVK) and methyl acrylate, using (DABCO) or (3-HQ) as catalyst. While most of the BH reactions were carried out at room temperature, some reactions were conducted using microwave irradiation. The resulting BH adducts have been subjected to dehydration, conjugate addition and allylic substitution to obtain appropriate intermediates, which have been used in turn, to synthesize possible lead compounds, viz., cinnamate esters as HIV-1 integrase inhibitors, 3-(aminomethyl)quinolines and quinolones as anti-malarials and cinnamate ester-AZT conjugates as dual-action HIV-1 integrase-reverse transcriptase (IN-RT) inhibitors. Conjugate addition reactions of methyl acrylate-derived BH β-hydroxy esters with the amines, piperidine, propargylamine and 2-amino-5-(diethylamino)pentane, has afforded a range of products as diastereomeric mixtures in moderate to excellent yields. Catalytic hydrogenation of the aminomethy β-hydroxy esters derivatives, using a palladium-oncarbon (Pd-C) catalyst, has afforded the corresponding, novel 3-aminomethyl-2- quinolone derivatives in moderate yields. Effective allylic substitution reactions of the MVK-derived BH β-hydroxy ketones (via a conjugate addition-elimination pathway) using in situ-generated HCl has afforded the corresponding α-chloromethyl derivatives, which have been reacted with various amines, including piperidine, piperazine, propargylamine and 2-amino-5-(diethylamino)pentane, to yield α-aminomethyl derivatives. Catalytic hydrogenation of selected α-aminomethyl derivatives, using a Pd-C catalyst, has afforded the corresponding, novel 3- (aminomethyl)-2-methylquinoline derivatives in low to moderate yields. A bioassay, conducted on a 6-hydroxy-2-methyl-3-[(piperidin-1-yl)methyl]quinoline isolated early in the study indicated anti-malarial activity and prompted further efforts in the synthesis of analogous compounds. Reaction of the methyl acrylate-derived BH adducts with POCl3 has provided access to α-(chloromethyl)cinnamate ester derivatives, which have been aminated to afford α- (aminomethyl)cinnamate ester derivatives as potential HIV-1 integrase inhibitors. The α- (propargylaminomethyl)cinnamates were used, in turn, as substrates for the “click chemistry” reaction with 3'-azido-3'-deoxythymidine (AZT– an azide and an established reverse transcriptase HIV-1 inhibitor) to afford cinnamate ester-AZT conjugates as potential dual-action HIV-1 integrase-reverse transcriptase (IN-RT) inhibitors. Computer modelling and docking studies of a cinnamate ester-AZT conjugate into the HIV-1 integrase and reverse transcriptase active-sites revealed potential hydrogen-bonding interactions with amino acid residues within the receptor cavities. The isolated products have been appropriately characterized using IR, 1- and 2-D NMR and HRMS techniques, while elucidation of the stereochemistry of the double bond in the BH-derived halomethyl derivatives has been assigned on the basis of NOE, computer modelling and X-ray crystallographic data.
- Full Text:
- Date Issued: 2012
- Authors: Idahosa, Kenudi Christiana
- Date: 2012
- Subjects: Antimalarials -- Research Malaria -- Chemotherapy -- Research AIDS (Disease) -- Treatment -- Research AIDS (Disease) -- Chemotherapy -- Research
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4410 , http://hdl.handle.net/10962/d1006763
- Description: This project has focused on exploring the application of Baylis-Hillman (BH) {a.k.a. Morita-Baylis-Hillman (MBH)} scaffolds in the construction of various compounds with medicinal potential. A series of 2-nitrobenzaldehydes has been treated under BH conditions, with two different activated alkenes, viz., (MVK) and methyl acrylate, using (DABCO) or (3-HQ) as catalyst. While most of the BH reactions were carried out at room temperature, some reactions were conducted using microwave irradiation. The resulting BH adducts have been subjected to dehydration, conjugate addition and allylic substitution to obtain appropriate intermediates, which have been used in turn, to synthesize possible lead compounds, viz., cinnamate esters as HIV-1 integrase inhibitors, 3-(aminomethyl)quinolines and quinolones as anti-malarials and cinnamate ester-AZT conjugates as dual-action HIV-1 integrase-reverse transcriptase (IN-RT) inhibitors. Conjugate addition reactions of methyl acrylate-derived BH β-hydroxy esters with the amines, piperidine, propargylamine and 2-amino-5-(diethylamino)pentane, has afforded a range of products as diastereomeric mixtures in moderate to excellent yields. Catalytic hydrogenation of the aminomethy β-hydroxy esters derivatives, using a palladium-oncarbon (Pd-C) catalyst, has afforded the corresponding, novel 3-aminomethyl-2- quinolone derivatives in moderate yields. Effective allylic substitution reactions of the MVK-derived BH β-hydroxy ketones (via a conjugate addition-elimination pathway) using in situ-generated HCl has afforded the corresponding α-chloromethyl derivatives, which have been reacted with various amines, including piperidine, piperazine, propargylamine and 2-amino-5-(diethylamino)pentane, to yield α-aminomethyl derivatives. Catalytic hydrogenation of selected α-aminomethyl derivatives, using a Pd-C catalyst, has afforded the corresponding, novel 3- (aminomethyl)-2-methylquinoline derivatives in low to moderate yields. A bioassay, conducted on a 6-hydroxy-2-methyl-3-[(piperidin-1-yl)methyl]quinoline isolated early in the study indicated anti-malarial activity and prompted further efforts in the synthesis of analogous compounds. Reaction of the methyl acrylate-derived BH adducts with POCl3 has provided access to α-(chloromethyl)cinnamate ester derivatives, which have been aminated to afford α- (aminomethyl)cinnamate ester derivatives as potential HIV-1 integrase inhibitors. The α- (propargylaminomethyl)cinnamates were used, in turn, as substrates for the “click chemistry” reaction with 3'-azido-3'-deoxythymidine (AZT– an azide and an established reverse transcriptase HIV-1 inhibitor) to afford cinnamate ester-AZT conjugates as potential dual-action HIV-1 integrase-reverse transcriptase (IN-RT) inhibitors. Computer modelling and docking studies of a cinnamate ester-AZT conjugate into the HIV-1 integrase and reverse transcriptase active-sites revealed potential hydrogen-bonding interactions with amino acid residues within the receptor cavities. The isolated products have been appropriately characterized using IR, 1- and 2-D NMR and HRMS techniques, while elucidation of the stereochemistry of the double bond in the BH-derived halomethyl derivatives has been assigned on the basis of NOE, computer modelling and X-ray crystallographic data.
- Full Text:
- Date Issued: 2012
Best practices to create an enabling environment for SME incubation in South Africa
- Authors: Dames, Ricardo Shane
- Date: 2012
- Subjects: Business incubators -- South Africa , New business enterprises -- South Africa , Small businesses -- South Africa -- Management
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: vital:9301 , http://hdl.handle.net/10948/d1015031
- Description: The humble beginnings of business incubators date back to the 1970s in the USA and United Kingdom, where abandoned industrial buildings were converted to rent out to small businesses. South Africa (SA) was first introduced to business incubation in the 1980s when the Small Business Development Corporation (SBDC) established a number of business ‘hives’ and provided business space to entrepreneurs to operate their businesses. In their most basic form, business incubators provide a safe and nurturing environment for entrepreneurs to establish their small businesses. While in incubation, the Small and Medium Enterprises (SMEs) are supported with a number of services which assist their growth and development until they are able to exit the incubator as sustainable and viable businesses. Global incubator models have matured significantly, and now include assisting with business idea generation, accelerating business start-ups and commercialisation processes, and identifying high-growth orientated SMEs to assist them with gaining market access. The establishment of business incubators was a government-driven initiative, and more than 33 SME incubators exist in SA. Most of the incubators are government-funded, and have focused on the establishment and growth of SMEs to act as a catalyst to promote economic development and alleviate socio-economic challenges such as unemployment and poverty. Despite these noble objectives, incubation in SA has not been fully utilised, and a high SME failure rate still prevails in the country. One of the reasons for SME failure may be ascribed to the lack of an enabling SME incubation environment in SA. When compared to other developing countries such as Brazil with as many as 400 incubators, it is clear that the SA incubation industry still needs further development. The purpose of this study therefore was to ascertain the best practices of global business incubators in both developed and developing countries, and how SA incubators could learn from these best practices to create a more conducive and enabling SME incubation environment. Background literature on business incubation with a specific focus on best practices in world incubators in both developed and developing countries, was reviewed. Some of the literature reviewed included Aernoudt (2004), Buys and Mbewana (2007) and Chandra (2009). From the literature review, four main best practice areas were identified, namely strategic focus, sources of funding, incubator services, and the role of government. The study followed a qualitative approach, and an interview schedule was developed to seek the perceptions of incubator managers on how the four identified best practices can be utilised to create an enabling SA incubation environment. A survey was conducted by interviewing 14 incubator managers (twelve government and two private) in SA. Data was collected over a six-month period, using face-to-face and telephonic interviews. Data was analysed using the content analysis, constant comparison, grounded theory and case study methods. The biographical profiles of the incubator managers and incubators were presented in case studies. An initial analysis was made to identify themes and sub themes within the four best practices explored, using the constant comparison method. Thereafter a provincial comparative analysis was made, as well as a comparison of government funded versus privately funded incubators. The findings suggested that there is a relatively high turnover in incubator management, and that they often do not have incubator management experience. A provincial comparison of SA incubators revealed that their strategic focuses are greatly influenced by the industry prevailing in the various provinces. All SA incubators provide pre- and post incubation services, but few are utilising virtual incubation. Most SA incubators are government-funded, and some use a hybrid funding model. It was evident that most SA incubators are aware of government policies and programmes available to assist them on local, provincial and national levels. A comparison of the best practices of two developing countries and three developed countries, as well as suggestions made by SA incubator managers indicated that SA has indeed followed best practices from both developing and developed countries, but there are areas of non-alignment which provide scope for improvement, to create a more conducive and enabling incubation environment. This study recommends that incubators should have an entrepreneurial focus, and reposition and align their strategic focus with government policies and instruments. SA incubators must pursue opportunities for virtual incubation as well as linkages with academic institutions, in order to offer value-added services such as research, development and commercialisation of the product ideas. Incubators in SA must pursue a hybrid funding model with a combination of government and private funding, and generate some or their own income. With regard to the role of government, it is recommended that the roll-out of more industry-specific incubators be privatised, and that an overseeing body for incubation be established.
- Full Text:
- Date Issued: 2012
- Authors: Dames, Ricardo Shane
- Date: 2012
- Subjects: Business incubators -- South Africa , New business enterprises -- South Africa , Small businesses -- South Africa -- Management
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: vital:9301 , http://hdl.handle.net/10948/d1015031
- Description: The humble beginnings of business incubators date back to the 1970s in the USA and United Kingdom, where abandoned industrial buildings were converted to rent out to small businesses. South Africa (SA) was first introduced to business incubation in the 1980s when the Small Business Development Corporation (SBDC) established a number of business ‘hives’ and provided business space to entrepreneurs to operate their businesses. In their most basic form, business incubators provide a safe and nurturing environment for entrepreneurs to establish their small businesses. While in incubation, the Small and Medium Enterprises (SMEs) are supported with a number of services which assist their growth and development until they are able to exit the incubator as sustainable and viable businesses. Global incubator models have matured significantly, and now include assisting with business idea generation, accelerating business start-ups and commercialisation processes, and identifying high-growth orientated SMEs to assist them with gaining market access. The establishment of business incubators was a government-driven initiative, and more than 33 SME incubators exist in SA. Most of the incubators are government-funded, and have focused on the establishment and growth of SMEs to act as a catalyst to promote economic development and alleviate socio-economic challenges such as unemployment and poverty. Despite these noble objectives, incubation in SA has not been fully utilised, and a high SME failure rate still prevails in the country. One of the reasons for SME failure may be ascribed to the lack of an enabling SME incubation environment in SA. When compared to other developing countries such as Brazil with as many as 400 incubators, it is clear that the SA incubation industry still needs further development. The purpose of this study therefore was to ascertain the best practices of global business incubators in both developed and developing countries, and how SA incubators could learn from these best practices to create a more conducive and enabling SME incubation environment. Background literature on business incubation with a specific focus on best practices in world incubators in both developed and developing countries, was reviewed. Some of the literature reviewed included Aernoudt (2004), Buys and Mbewana (2007) and Chandra (2009). From the literature review, four main best practice areas were identified, namely strategic focus, sources of funding, incubator services, and the role of government. The study followed a qualitative approach, and an interview schedule was developed to seek the perceptions of incubator managers on how the four identified best practices can be utilised to create an enabling SA incubation environment. A survey was conducted by interviewing 14 incubator managers (twelve government and two private) in SA. Data was collected over a six-month period, using face-to-face and telephonic interviews. Data was analysed using the content analysis, constant comparison, grounded theory and case study methods. The biographical profiles of the incubator managers and incubators were presented in case studies. An initial analysis was made to identify themes and sub themes within the four best practices explored, using the constant comparison method. Thereafter a provincial comparative analysis was made, as well as a comparison of government funded versus privately funded incubators. The findings suggested that there is a relatively high turnover in incubator management, and that they often do not have incubator management experience. A provincial comparison of SA incubators revealed that their strategic focuses are greatly influenced by the industry prevailing in the various provinces. All SA incubators provide pre- and post incubation services, but few are utilising virtual incubation. Most SA incubators are government-funded, and some use a hybrid funding model. It was evident that most SA incubators are aware of government policies and programmes available to assist them on local, provincial and national levels. A comparison of the best practices of two developing countries and three developed countries, as well as suggestions made by SA incubator managers indicated that SA has indeed followed best practices from both developing and developed countries, but there are areas of non-alignment which provide scope for improvement, to create a more conducive and enabling incubation environment. This study recommends that incubators should have an entrepreneurial focus, and reposition and align their strategic focus with government policies and instruments. SA incubators must pursue opportunities for virtual incubation as well as linkages with academic institutions, in order to offer value-added services such as research, development and commercialisation of the product ideas. Incubators in SA must pursue a hybrid funding model with a combination of government and private funding, and generate some or their own income. With regard to the role of government, it is recommended that the roll-out of more industry-specific incubators be privatised, and that an overseeing body for incubation be established.
- Full Text:
- Date Issued: 2012