Re-interpreting the history of 'the rural' visual in the Eastern Cape, 1948-1976
- Authors: Steele, Candice Alexandra
- Date: 2018
- Subjects: Medical photography -- South Africa -- Exhibitions Photography in ethnology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/11064 , vital:37027
- Description: The thesis engages with the photographic collection of Dr Pauline Ingle, an amateur photographer who lived and worked in the former Transkei as a medical doctor from 1948-1976. As a visual history project situated within critical visual studies, the thesis is concerned to attend to the disciplinary optics that have conditioned seeing and constituted genres; but also the ways in which these genres have constituted subjects and corralled them into positions commensurate with the spatialised demarcations of the rural and the urban, and the attendant associations of tradition and modernity. The thesis begins by exploring the biography of Pauline Ingle and tracks the movement of the photographs from a private collection into the public realm and its constitution as an archive. The thesis then moves into a discussion of the key determinants of the ethnographic genre and its entwinement with the discipline of anthropology, as a foundation against which to investigate the limits of reading her images within this genre and the disruptions that are discernible through an aesthetics of proximity and forms of image-making that do not control the visual field. Through a theorisation that proposes the image as an act, various readings are brought to bear on the images through the lens of the social and political. Mobilising the concepts of social acts and acts of citizenship, allows for a reading that breaks with the disciplinary conditioning that has fixed subject positions into ‘the native subject’ and the ‘liberal subject’ and calls into question the construction of the human. By proposing the subject as migrant, is to signal that the question of the human/subject is more complex and convoluted than previously thought.
- Full Text:
- Date Issued: 2018
- Authors: Steele, Candice Alexandra
- Date: 2018
- Subjects: Medical photography -- South Africa -- Exhibitions Photography in ethnology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/11064 , vital:37027
- Description: The thesis engages with the photographic collection of Dr Pauline Ingle, an amateur photographer who lived and worked in the former Transkei as a medical doctor from 1948-1976. As a visual history project situated within critical visual studies, the thesis is concerned to attend to the disciplinary optics that have conditioned seeing and constituted genres; but also the ways in which these genres have constituted subjects and corralled them into positions commensurate with the spatialised demarcations of the rural and the urban, and the attendant associations of tradition and modernity. The thesis begins by exploring the biography of Pauline Ingle and tracks the movement of the photographs from a private collection into the public realm and its constitution as an archive. The thesis then moves into a discussion of the key determinants of the ethnographic genre and its entwinement with the discipline of anthropology, as a foundation against which to investigate the limits of reading her images within this genre and the disruptions that are discernible through an aesthetics of proximity and forms of image-making that do not control the visual field. Through a theorisation that proposes the image as an act, various readings are brought to bear on the images through the lens of the social and political. Mobilising the concepts of social acts and acts of citizenship, allows for a reading that breaks with the disciplinary conditioning that has fixed subject positions into ‘the native subject’ and the ‘liberal subject’ and calls into question the construction of the human. By proposing the subject as migrant, is to signal that the question of the human/subject is more complex and convoluted than previously thought.
- Full Text:
- Date Issued: 2018
Scale-specific processes underlying the genetic population structure of seabirds in the tropical western Indian Ocean
- Authors: Danckwerts, Daniel Keith
- Date: 2018
- Subjects: Sea birds -- Indian Ocean , Sea birds -- Behavior -- Indian Ocean , Sea birds -- Mortality -- Indian Ocean , Sea birds -- Mortality -- Prevention , Sea birds -- Reproduction , Bird declines -- Indian Ocean , Sea birds -- Indian Ocean -- Effect of human beings on , Sooty tern , Red-footed booby , Pterodroma
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63944 , vital:28513
- Description: Global seabird populations have declined by 70%, since 1950, largely in response to human mediated threats. Identifying the pressures that the remaining populations face has therefore become a top priority. Many breeding colonies are now monitored annually, though others have been almost completely neglected. Considerable bias also exists towards higher latitude species, while fewer studies have been conducted on tropical groups. Beyond tracking population sizes, numerous knowledge gaps also exist that severely restrict conservation efforts. This includes the understanding of seabird meta-population structure and the processes underlying population divergence. The importance of these studies lies in the fact that the preservation of biodiversity requires the conservation of diversification processes. Generating this knowledge is therefore an important first step towards recognising responses to episodic disturbance and long-term environmental change, as well as recovery potential. In this context, the present study employed microsatellite analysis and ringing information to investigate the processes underlying the metapopulation structure of seabirds in the tropical western Indian Ocean. Three species were selected as proxies to cover a range of population sizes, distributional ranges, and intrinsic behavioural (e.g. migratory behaviour) and morphological (e.g. polymorphism) characteristics. These were the Sooty Tern (Onychoprion fuscatus), Red-footed Booby (Sula sula), and Barau’s Petrel (Pterodorma baraui). The overall objective was to provide insight into the mechanisms underlying divergence across a range of scales. Microsatellite information highlighted that genetic populations of the Red-footed Booby and Barau’s Petrel were weakly, though significantly, structured. For the Barau’s Petrel, this was supported by ringing information that indicated extreme colony fidelity. Some gene flow appears to occur among the breeding colonies of the Red-footed Booby, though the scale and frequency of this remains uncertain as banding information is insufficient at this stage. Nevertheless, though populations of both species were genetically structured, the processes underlying divergence were different. Extreme natal philopatry appears to have driven divergence between the two colonies of the Barau’s Petrel, while local selective forces (e.g. kleptoparasitism risk and/or selection against immigrants) appear to have isolated the three studied breeding colonies of the Red-footed Booby. Conversely, microsatellite information identified a total lack of genetic structure among breeding colonies of the Sooty Tern in the western Indian Ocean, and between colonies in the western Indian and Eastern Pacific Oceans. This accords with banding recoveries, which illustrate considerable inter-colony exchange of individuals among most islands of the Seychelles and between breeding colonies in the western Indian and West Pacific Oceans. The processes underlying the genetic population structure (or, in this case, lack thereof) in the Sooty Tern therefore appear to operate at extremely large scales. The species’ low natal philopatry and high dispersal capabilities, combined with an importance of social stimulation and a reliance on seasonally favourable marine conditions, appears to influence the decisions of where and when individual Sooty Terns choose to breed. Anthropogenic disturbance at breeding sites, particularly that related to egg harvesting activities, also appears to drive dispersal in the Sooty Tern. These results improve our understanding of the mechanisms underlying the genetic population structure in seabirds at low latitudes. However, numerous questions remain unanswered and warrant further study. Clear conservation implications were also identified for the three studied species. Nevertheless, caution should still be applied when extrapolating this information across other species.
- Full Text:
- Date Issued: 2018
- Authors: Danckwerts, Daniel Keith
- Date: 2018
- Subjects: Sea birds -- Indian Ocean , Sea birds -- Behavior -- Indian Ocean , Sea birds -- Mortality -- Indian Ocean , Sea birds -- Mortality -- Prevention , Sea birds -- Reproduction , Bird declines -- Indian Ocean , Sea birds -- Indian Ocean -- Effect of human beings on , Sooty tern , Red-footed booby , Pterodroma
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63944 , vital:28513
- Description: Global seabird populations have declined by 70%, since 1950, largely in response to human mediated threats. Identifying the pressures that the remaining populations face has therefore become a top priority. Many breeding colonies are now monitored annually, though others have been almost completely neglected. Considerable bias also exists towards higher latitude species, while fewer studies have been conducted on tropical groups. Beyond tracking population sizes, numerous knowledge gaps also exist that severely restrict conservation efforts. This includes the understanding of seabird meta-population structure and the processes underlying population divergence. The importance of these studies lies in the fact that the preservation of biodiversity requires the conservation of diversification processes. Generating this knowledge is therefore an important first step towards recognising responses to episodic disturbance and long-term environmental change, as well as recovery potential. In this context, the present study employed microsatellite analysis and ringing information to investigate the processes underlying the metapopulation structure of seabirds in the tropical western Indian Ocean. Three species were selected as proxies to cover a range of population sizes, distributional ranges, and intrinsic behavioural (e.g. migratory behaviour) and morphological (e.g. polymorphism) characteristics. These were the Sooty Tern (Onychoprion fuscatus), Red-footed Booby (Sula sula), and Barau’s Petrel (Pterodorma baraui). The overall objective was to provide insight into the mechanisms underlying divergence across a range of scales. Microsatellite information highlighted that genetic populations of the Red-footed Booby and Barau’s Petrel were weakly, though significantly, structured. For the Barau’s Petrel, this was supported by ringing information that indicated extreme colony fidelity. Some gene flow appears to occur among the breeding colonies of the Red-footed Booby, though the scale and frequency of this remains uncertain as banding information is insufficient at this stage. Nevertheless, though populations of both species were genetically structured, the processes underlying divergence were different. Extreme natal philopatry appears to have driven divergence between the two colonies of the Barau’s Petrel, while local selective forces (e.g. kleptoparasitism risk and/or selection against immigrants) appear to have isolated the three studied breeding colonies of the Red-footed Booby. Conversely, microsatellite information identified a total lack of genetic structure among breeding colonies of the Sooty Tern in the western Indian Ocean, and between colonies in the western Indian and Eastern Pacific Oceans. This accords with banding recoveries, which illustrate considerable inter-colony exchange of individuals among most islands of the Seychelles and between breeding colonies in the western Indian and West Pacific Oceans. The processes underlying the genetic population structure (or, in this case, lack thereof) in the Sooty Tern therefore appear to operate at extremely large scales. The species’ low natal philopatry and high dispersal capabilities, combined with an importance of social stimulation and a reliance on seasonally favourable marine conditions, appears to influence the decisions of where and when individual Sooty Terns choose to breed. Anthropogenic disturbance at breeding sites, particularly that related to egg harvesting activities, also appears to drive dispersal in the Sooty Tern. These results improve our understanding of the mechanisms underlying the genetic population structure in seabirds at low latitudes. However, numerous questions remain unanswered and warrant further study. Clear conservation implications were also identified for the three studied species. Nevertheless, caution should still be applied when extrapolating this information across other species.
- Full Text:
- Date Issued: 2018
Self-regulation and academic performance in early childhood :an East London study
- Authors: Martin, Glynnis Michelle
- Date: 2018
- Subjects: Self-control in children Early childhood education Child rearing
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/10949 , vital:35969
- Description: Previous research studies have identified various factors as influential in whether one is successful in obtaining the education necessary for effective living within a given society. Early academic performance is consistently linked to later academic performance, which in turn, relates to physical, mental and even financial health outcomes in adulthood. The recognition that competence with the demands of learning and socialization can set up cycles of success or failure, lead to much research interest directed at the key role of self-regulation, as an executive function skill, in early academic performance. Despite this growing body of research, a comprehensive conceptual model for the predictive role and interaction between complex executive functions, socio-emotional competence, learning aptitudes and visuomotor skills, as predictors in early academic success, is still lacking. Knowledge of the integrated functioning of these predictors in the South African context is particularly scarce. This research was designed to address these knowledge gaps through an exploratory descriptive and causal-comparative study. Purposive, non-probability sampling was used to select a group of 183 Grade 1 learners from a low socio-economic area of East London in South Africa. Ages ranged from 6 to 8 years (M = 6.78, SD = 0.54), whilst 40% were female and 60% were male. Predictors of academic success were measured at the start of the first academic term, and a parent-report measure was used to measure socio-emotional competencies. Second term school report cards were used to measure mid-year academic achievement. Relationships between each predictor and their relationships to academic performance were explored through Pearson product-moment correlation coefficients. vii One-way Analysis of Variance with post-hoc Scheffé tests was used to explore differences between groups of Gender, Age, Home Language, Maternal Marital Status, Maternal Age and whether the grade was being Repeated or not. Two priori conceptual models of the relationships between the predictor variables and academic performance were estimated through Structural Equation Modeling. Results indicate various significant relationships between each predictor and specific aspects of academic performance. Visuomotor skills showed the strongest correlation to academic performance, followed by learning abilities and complex executive functions. Social-emotional competence was not practically significantly related to any of the factors and appeared to affect academic performance primarily through a significant relationship to complex executive functions. Interestingly, results indicate subtypes of visuomotor skills that are significantly correlated to the complex executive, as also highly correlated with academic performance. Precision tasks that were not related to complex executive function, was not significantly related to academic performance. Results furthermore identify the significant influence of caregiver factors on visuomotor skills and that of home language on learning abilities. Regression analysis results confirm a significant mediating effect of learning aptitudes in relation to the effects of complex executive function and visuomotor skills on academic performance. Model comparison supported this mediation-model as superior to a no-mediation model in predicting academic success in Grade 1. This study expands on the understanding of the role of the common executive function in relation to factors associated with crystallized intelligence, visuomotor skills and socio-emotional competencies in predicting early academic success. This study presents an innovative integrated mediation model of the relationships between the identified predictors in relation to academic success.
- Full Text:
- Date Issued: 2018
- Authors: Martin, Glynnis Michelle
- Date: 2018
- Subjects: Self-control in children Early childhood education Child rearing
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/10949 , vital:35969
- Description: Previous research studies have identified various factors as influential in whether one is successful in obtaining the education necessary for effective living within a given society. Early academic performance is consistently linked to later academic performance, which in turn, relates to physical, mental and even financial health outcomes in adulthood. The recognition that competence with the demands of learning and socialization can set up cycles of success or failure, lead to much research interest directed at the key role of self-regulation, as an executive function skill, in early academic performance. Despite this growing body of research, a comprehensive conceptual model for the predictive role and interaction between complex executive functions, socio-emotional competence, learning aptitudes and visuomotor skills, as predictors in early academic success, is still lacking. Knowledge of the integrated functioning of these predictors in the South African context is particularly scarce. This research was designed to address these knowledge gaps through an exploratory descriptive and causal-comparative study. Purposive, non-probability sampling was used to select a group of 183 Grade 1 learners from a low socio-economic area of East London in South Africa. Ages ranged from 6 to 8 years (M = 6.78, SD = 0.54), whilst 40% were female and 60% were male. Predictors of academic success were measured at the start of the first academic term, and a parent-report measure was used to measure socio-emotional competencies. Second term school report cards were used to measure mid-year academic achievement. Relationships between each predictor and their relationships to academic performance were explored through Pearson product-moment correlation coefficients. vii One-way Analysis of Variance with post-hoc Scheffé tests was used to explore differences between groups of Gender, Age, Home Language, Maternal Marital Status, Maternal Age and whether the grade was being Repeated or not. Two priori conceptual models of the relationships between the predictor variables and academic performance were estimated through Structural Equation Modeling. Results indicate various significant relationships between each predictor and specific aspects of academic performance. Visuomotor skills showed the strongest correlation to academic performance, followed by learning abilities and complex executive functions. Social-emotional competence was not practically significantly related to any of the factors and appeared to affect academic performance primarily through a significant relationship to complex executive functions. Interestingly, results indicate subtypes of visuomotor skills that are significantly correlated to the complex executive, as also highly correlated with academic performance. Precision tasks that were not related to complex executive function, was not significantly related to academic performance. Results furthermore identify the significant influence of caregiver factors on visuomotor skills and that of home language on learning abilities. Regression analysis results confirm a significant mediating effect of learning aptitudes in relation to the effects of complex executive function and visuomotor skills on academic performance. Model comparison supported this mediation-model as superior to a no-mediation model in predicting academic success in Grade 1. This study expands on the understanding of the role of the common executive function in relation to factors associated with crystallized intelligence, visuomotor skills and socio-emotional competencies in predicting early academic success. This study presents an innovative integrated mediation model of the relationships between the identified predictors in relation to academic success.
- Full Text:
- Date Issued: 2018
Sepedi oral poetry with reference to kiba traditional dance of South Africa
- Authors: Maahlamela, Tebogo David
- Date: 2018
- Subjects: Northern Sotho poetry , Northern Sotho poetry -- History and criticism , Folk songs, Northern Sotho , Sound poetry -- South Africa , Archival materials -- Conservation and restoration , Spiritualism in literature , Cultural appropriation , Folk poetry, Northern Sotho , Kiba traditional dance , Kiba poetry
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63209 , vital:28381
- Description: Previous studies show that contrary to other African languages of fewer speakers, written poetry in Sepedi/Sesotho sa Leboa’s transition from oral to written did not only lag behind, its development was also slow, with less intense treatment. However, this scarcity is not of the actual oral material, but rather its documented version. Vast untreated material at various repositories such as the South African Broadcasting Corporation (SABC) library and the International Library of African Music (ILAM) are facing a risk of being lost due to limited resources and resourcefulness to digitalise them. Investigation of written poetry from 1906 to 2006 attests to the fact that in its written form, Sepedi/Sesotho sa Leboa poetry is still underdeveloped, dominated by “microwaved” collections aiming at nothing beyond meeting school prescription criteria. Calls have been made from the dominant South African poetry narrative that there are no innovative studies in the field of African languages, especially Sepedi/Sesotho sa Leboa. Musicological studies show that contemporary jazz artists have adopted and adapted kiba poetry into jazz music, which resulted into classics of all times. Intensive studies were conducted on such poetic kiba-influenced jazz, but the primary source remains a grey area. The analysis of selected kiba poems shows that kiba poetry is the richest poetic form in the Sepedi/Sesotho sa Leboa with its creative and artistic merit exceeds all other genres. The study further reveals that kiba poetry is the heart of Bapedi/Basotho ba Leboa spirituality, a heart without which some faith institutions will remain incomplete. Furthermore, kiba poetry embodies, among others, poetic genres rarely explored in the South African poetry milieu such as “sound poetry” and poetry of special metrical schemes, of dramatic and devotional essence. Scholarly attention is, therefore, recommended on this repertoire to explore the field beyond this preliminary study, so as to save as many kiba poems as possible, which will enrich the dwindling written poetry milieu. Literary excellence of the treated poems attests to the fact that the artistic wealth of kiba poetry is worthy of attention, and it has potential to transform not only the face of poetry in Sepedi/Sesotho sa Leboa, but of the entire South African poetry landscape.
- Full Text:
- Date Issued: 2018
- Authors: Maahlamela, Tebogo David
- Date: 2018
- Subjects: Northern Sotho poetry , Northern Sotho poetry -- History and criticism , Folk songs, Northern Sotho , Sound poetry -- South Africa , Archival materials -- Conservation and restoration , Spiritualism in literature , Cultural appropriation , Folk poetry, Northern Sotho , Kiba traditional dance , Kiba poetry
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63209 , vital:28381
- Description: Previous studies show that contrary to other African languages of fewer speakers, written poetry in Sepedi/Sesotho sa Leboa’s transition from oral to written did not only lag behind, its development was also slow, with less intense treatment. However, this scarcity is not of the actual oral material, but rather its documented version. Vast untreated material at various repositories such as the South African Broadcasting Corporation (SABC) library and the International Library of African Music (ILAM) are facing a risk of being lost due to limited resources and resourcefulness to digitalise them. Investigation of written poetry from 1906 to 2006 attests to the fact that in its written form, Sepedi/Sesotho sa Leboa poetry is still underdeveloped, dominated by “microwaved” collections aiming at nothing beyond meeting school prescription criteria. Calls have been made from the dominant South African poetry narrative that there are no innovative studies in the field of African languages, especially Sepedi/Sesotho sa Leboa. Musicological studies show that contemporary jazz artists have adopted and adapted kiba poetry into jazz music, which resulted into classics of all times. Intensive studies were conducted on such poetic kiba-influenced jazz, but the primary source remains a grey area. The analysis of selected kiba poems shows that kiba poetry is the richest poetic form in the Sepedi/Sesotho sa Leboa with its creative and artistic merit exceeds all other genres. The study further reveals that kiba poetry is the heart of Bapedi/Basotho ba Leboa spirituality, a heart without which some faith institutions will remain incomplete. Furthermore, kiba poetry embodies, among others, poetic genres rarely explored in the South African poetry milieu such as “sound poetry” and poetry of special metrical schemes, of dramatic and devotional essence. Scholarly attention is, therefore, recommended on this repertoire to explore the field beyond this preliminary study, so as to save as many kiba poems as possible, which will enrich the dwindling written poetry milieu. Literary excellence of the treated poems attests to the fact that the artistic wealth of kiba poetry is worthy of attention, and it has potential to transform not only the face of poetry in Sepedi/Sesotho sa Leboa, but of the entire South African poetry landscape.
- Full Text:
- Date Issued: 2018
Servant leadership: antecedent to Quality of Worklife of customer service frontline employees
- Authors: Bedser, Mark Bernard
- Date: 2018
- Subjects: Call center agents Servant leadership Customer Service -- Quality control Employee morale Job satisfaction Quality of work life
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62144 , vital:28132
- Description: Contact Centre agents operate in closely monitored and highly controlled environments and their work consists of solving service requests or assisting customers with information on products or services. Consequently their work involves a great deal of emotional labour and stress. It is not surprising then, that the working environment of the Contact Centre is reported to have a negative impact on the levels of Quality of Worklife of Contact Centre agents, and that in the Contact Centre context, it is likely that low levels of Quality of Worklife exist. It is argued that it is important for organisations to be particularly aware of the Quality of Worklife perceptions of their employees should they want to address Quality of Worklife levels and benefit from the positive consequences of higher levels of the construct. Numerous variables are reported to play either an antecedent, moderating, mediating, or consequential role in relation to the Quality of Worklife construct. A systems model of Quality of Worklife is developed, which illustrates the inter-relationships of these variables and how they affect and are affected by the Quality of Worklife construct. It is argued that leadership is an important antecedent to Quality of Worklife, and this is the antecedent of interest in this study. It is proposed that it is not just any leadership that will contribute to an improved Quality of Worklife, particularly within a challenging context such as the Contact Centre environment. Rather, it is suggested that certain qualities of leaders will have a greater influence on Quality of Worklife. For example, leaders who focus on relationships and are caring - characteristics associated with servant leaders - are deemed more suitable for the Contact Centre context. The research also proposes that there are close associations between Servant Leadership and Trust, which in turn has the potential to affect Quality of Worklife positively. It is argued, therefore, that Trust mediates the relationship between Servant Leadership and Quality of Worklife in the customer service frontline context. While there is a broad base of literature available on servant leadership that focuses on the senior or executive level of leadership, Van Dierendonck and Nuijten (2011) have argued that it is also relevant at the middle level of management and have validated an eight dimensional measure of servant leadership that is suitable for this management level. The Van Laar, Edwards and Easton (2007) Quality of Worklife model is also argued to be an appropriate model and measure of the Quality of Worklife construct, due to the robustness of the instrument design and the appropriateness of its underlying theory to the context of this research. Research has shown that leadership can have a significant relationship with Quality of Worklife. Moreover, a review of the literature on servant leadership reveals that trust, satisfaction, general well-being, and commitment to their jobs increases when employees are exposed to leadership behaviours associated with servant leadership. There is however, no evidence in the literature of any investigation of the relationship between Servant Leadership and Quality of Worklife, or of research investigating the partial mediating effects of Trust between these two constructs. Research was conducted to test this relationship. A survey questionnaire was administered amongst a sample of 555 Contact Centre agents, who were employed in eight different organisations. Confirmatory factor analysis procedures were conducted in STATA (V15.0), to test and validate the factor structure of Servant Leadership and Quality of Worklife models. The research also produced a Servant Leadership, Trust and Quality of Worklife structural equation model that supported the hypotheses of the relationships between the constructs. Mediation analysis confirmed Trust’s role as a mediator between Servant Leadership and Quality of Worklife. The structural equation model confirmed that synergies between Servant Leadership, Trust and Quality of Worklife exist, and that Trust partially mediates the relationship between Servant Leadership and Quality of Worklife. It is therefore argued that an increase in Servant Leadership behaviour by the manager or supervisor of frontline staff has a positive association with increases of Trust, as well as positive associations with Quality of Worklife experienced by employees in the frontline context. Moreover, it is also posited that the relationship between Servant Leadership and Quality of Worklife is partially mediated by Trust of the supervisor. The implications of these results are discussed, and recommendations made for management practice and further research.
- Full Text:
- Date Issued: 2018
- Authors: Bedser, Mark Bernard
- Date: 2018
- Subjects: Call center agents Servant leadership Customer Service -- Quality control Employee morale Job satisfaction Quality of work life
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62144 , vital:28132
- Description: Contact Centre agents operate in closely monitored and highly controlled environments and their work consists of solving service requests or assisting customers with information on products or services. Consequently their work involves a great deal of emotional labour and stress. It is not surprising then, that the working environment of the Contact Centre is reported to have a negative impact on the levels of Quality of Worklife of Contact Centre agents, and that in the Contact Centre context, it is likely that low levels of Quality of Worklife exist. It is argued that it is important for organisations to be particularly aware of the Quality of Worklife perceptions of their employees should they want to address Quality of Worklife levels and benefit from the positive consequences of higher levels of the construct. Numerous variables are reported to play either an antecedent, moderating, mediating, or consequential role in relation to the Quality of Worklife construct. A systems model of Quality of Worklife is developed, which illustrates the inter-relationships of these variables and how they affect and are affected by the Quality of Worklife construct. It is argued that leadership is an important antecedent to Quality of Worklife, and this is the antecedent of interest in this study. It is proposed that it is not just any leadership that will contribute to an improved Quality of Worklife, particularly within a challenging context such as the Contact Centre environment. Rather, it is suggested that certain qualities of leaders will have a greater influence on Quality of Worklife. For example, leaders who focus on relationships and are caring - characteristics associated with servant leaders - are deemed more suitable for the Contact Centre context. The research also proposes that there are close associations between Servant Leadership and Trust, which in turn has the potential to affect Quality of Worklife positively. It is argued, therefore, that Trust mediates the relationship between Servant Leadership and Quality of Worklife in the customer service frontline context. While there is a broad base of literature available on servant leadership that focuses on the senior or executive level of leadership, Van Dierendonck and Nuijten (2011) have argued that it is also relevant at the middle level of management and have validated an eight dimensional measure of servant leadership that is suitable for this management level. The Van Laar, Edwards and Easton (2007) Quality of Worklife model is also argued to be an appropriate model and measure of the Quality of Worklife construct, due to the robustness of the instrument design and the appropriateness of its underlying theory to the context of this research. Research has shown that leadership can have a significant relationship with Quality of Worklife. Moreover, a review of the literature on servant leadership reveals that trust, satisfaction, general well-being, and commitment to their jobs increases when employees are exposed to leadership behaviours associated with servant leadership. There is however, no evidence in the literature of any investigation of the relationship between Servant Leadership and Quality of Worklife, or of research investigating the partial mediating effects of Trust between these two constructs. Research was conducted to test this relationship. A survey questionnaire was administered amongst a sample of 555 Contact Centre agents, who were employed in eight different organisations. Confirmatory factor analysis procedures were conducted in STATA (V15.0), to test and validate the factor structure of Servant Leadership and Quality of Worklife models. The research also produced a Servant Leadership, Trust and Quality of Worklife structural equation model that supported the hypotheses of the relationships between the constructs. Mediation analysis confirmed Trust’s role as a mediator between Servant Leadership and Quality of Worklife. The structural equation model confirmed that synergies between Servant Leadership, Trust and Quality of Worklife exist, and that Trust partially mediates the relationship between Servant Leadership and Quality of Worklife. It is therefore argued that an increase in Servant Leadership behaviour by the manager or supervisor of frontline staff has a positive association with increases of Trust, as well as positive associations with Quality of Worklife experienced by employees in the frontline context. Moreover, it is also posited that the relationship between Servant Leadership and Quality of Worklife is partially mediated by Trust of the supervisor. The implications of these results are discussed, and recommendations made for management practice and further research.
- Full Text:
- Date Issued: 2018
Social learning for public participation in environmental governance: the case of Knysna Municipality
- Authors: Currie, Bianca
- Date: 2018
- Subjects: Environmental policy -- South Africa -- Knysna -- Social aspects , Environmental management -- South Africa -- Knysna
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/29852 , vital:30785
- Description: Democratic environmental governance in complex systems requires an adaptive management approach involving a diversity of stakeholders in collaborative learning and decision-making. The decisions are value-laden, and local municipalities are struggling to reconcile the diversity of values, and balance varied and diverse social and ecological needs, for sustainability. Social learning has emerged as a promising approach but the challenge lies in effective implementation, practice and assessment of social learning. This thesis explored public participation practices in environmental governance in the Knysna Municipality and went on to develop a social learning procedural model for public participation, as well as assessment criteria for monitoring social learning processes. The model and criteria provide a foundation and the tools needed to operationalise social learning for adaptive management in environmental governance in complex systems.
- Full Text:
- Date Issued: 2018
- Authors: Currie, Bianca
- Date: 2018
- Subjects: Environmental policy -- South Africa -- Knysna -- Social aspects , Environmental management -- South Africa -- Knysna
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/29852 , vital:30785
- Description: Democratic environmental governance in complex systems requires an adaptive management approach involving a diversity of stakeholders in collaborative learning and decision-making. The decisions are value-laden, and local municipalities are struggling to reconcile the diversity of values, and balance varied and diverse social and ecological needs, for sustainability. Social learning has emerged as a promising approach but the challenge lies in effective implementation, practice and assessment of social learning. This thesis explored public participation practices in environmental governance in the Knysna Municipality and went on to develop a social learning procedural model for public participation, as well as assessment criteria for monitoring social learning processes. The model and criteria provide a foundation and the tools needed to operationalise social learning for adaptive management in environmental governance in complex systems.
- Full Text:
- Date Issued: 2018
Spatial and seasonal variations of water quality determinants and pollutants as fitness-for-use and compliance assessments of the Mzimvubu catchment water resources for the proposed Mzimvubu Water Project, South Africa
- Authors: Mutingwende, Nhamo
- Date: 2018
- Subjects: Water quality -- South Africa Water quality management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9308 , vital:34320
- Description: The Department of Water Affairs as of late reported plans to build two substantial stockpiling dams in the Mzimvubu Catchment. The Mzimvubu stream basin is probably one of most prominent and undeveloped basin in South Africa. This is notwithstanding high yearly rainfall, high ecological status, high tourism potential, and appropriateness for afforestation, dryland/rainfed and water system agribusiness. Hence, the Department of Water Affairs researched the capability of building a multipurpose dam in the Mzimvubu catchment to catalyse financial and social improvement. The proposed dam will be based on the Tsitsa River. Often, scientific studies related to dam construction concentrate more on discovering the most, in fact, accessible place to construct it, than on the long haul socio-natural issues that come in its preparation. The water quality of the Tsitsa River, its tributaries and the underground drinking water sources within the Mzimvubu catchment are most likely to change once the dam wall is completed. Surface water resources are susceptible to chemical, physical, microbiological contamination and the so-called emerging pollutants either, through human or natural activities. A comprehensive baseline study on the water quality of the Mzimvubu water resources regarding traces of emerging pollutants and water quality determinants (physical, chemical and microbial) pre-dam construction is therefore essential. The objective of the water quality section of this study was to perform an in-depth analysis of water quality in the study area to form a baseline for future studies on how the built dam may affect these. The approach was to assess the spatial and seasonal variations of the pollutants (pharmaceuticals and pesticides) and water quality determinants for all water sources most likely to be affected by the development of the dam. The fitness-for-use and compliance assessments were conducted to assess if the current water resources are fit-for-use for various categories of use and if they comply with various water quality standards and guidelines as determined by the Department of Water Affairs and Forestry. Department of Water Affairs and Forestry is the overseer of South Africa's water assets, and its central goal is to keep up the fitness-for-use of water on a sustained basis. Water samples (500ml) were collected from sixteen (16) sample points, ranging from the proposed mouth of the dam to the N2 bridge point of the Tsitsa River. Points were selected where the Tsitsa River was accessible using the dam project development roads or where tributaries to the Tsitsa River were accessible using dam development roads. Taps/groundwater sources were sampled from the five selected villages. Monthly samples were collected upstream and downstream of the proposed dam wall, from June 2015 to April 2017.Seventeen (17) water quality indices were therefore analysed at sixteen sampling sites, over a two year period. The AB SCIEX TripleTOF™5600 LC/MS/MS was used to screen for pharmaceutical and pesticide pollutants. All the water quality indices were analysed using the AL400 Aqua lytic photometer, and the microbial analysis was done using the Rand Water Method Number 1.2.2.09.1 for enumerating the amount of E. coli and coliforms in the water samples (Rand Water, 2010f). The South African Water Quality Guidelines, Volumes 1 to 7 (DWS, 1996a-g) were used to assess the fitness-for-use of the water sources. To confirm the compliance of the water resources to various standards and guidelines, the water quality data were assessed against international and national guidelines and standards i.e. the WHO guideline, South African water quality guidelines (domestic, irrigation, livestock and watering, aquaculture, and aquatic ecosystems), and the SANS: 241 (2015) standard for drinking water. Non-parametric statistics were utilised to ascertain the changeability, which is a measure of how water quality may vary after some time. With non-parametric insights, the interquartile extent, which lies between the 25th and the 75th percentile, was utilised to depict inconstancy. The median value (50th percentile) was used as an indication of the central tendency or average. The 90th percentile was included as it can be used to assess the frequency of excursions into higher and possibly unacceptable water quality conditions. 3D Sigma plot was used to graphical present the spatial and seasonal variations of water quality indices and emerging pollutants against their concentrations. Fundamental statistical properties and correlations of water quality variables from the Tsitsa River, Tsitsa River tributaries and the drinking water sources were examined using SAS descriptive statistics. The water quality was determined to be of relatively sound quality, based on the comparison with guidelines and standards for the various intended uses, even though some of the water quality determinants were non-compliant and were “unacceptable” regarding fitness for purpose. The water quality of the Ntabalenga dam would most probably be affected by natural influences (for example rainfall, weathering and geological composition) and anthropogenic factors through non-point source pollution from agriculture activities, human settlements (pit latrines and open defecation) as well as industrial activities in the Maclear and Tsolo towns (wastewater treatments plants effluent, hospital effluent). The Tsitsa River had the highest number of non-compliances, especially to the World Health Organisation and Department of Water and Sanitation aquaculture guidelines. Therefore, the Tsitsa River’s water quality would be a significant factor that could compromise the water quality of the water collected in the dam. The human settlement conditions and agricultural inputs seem to be the factors contributing most to contamination of the surface water of the catchment area. The lack of sanitation systems and facilities means that community members have to use the bush and rivers for ablutions, thus contributing to microbial contamination of the environment. The direct application of manure and fertilisers on the fields by farmers further exacerbates microbial contamination and high nutrient inputs into the environment as observed in elevated microbial and phosphate contaminants during the study period. The data obtained from the analysis of pesticides and pharmaceuticals confirmed the contamination of the drinking water sources, the Tsitsa River and its tributaries with pesticides and pharmaceuticals through non-point source pollution. The origins of these pharmaceutical contaminants were identified as the pit latrines, open defecation and wastewater treatment plant effluent, while agricultural application of pesticides was identified as the source of pesticides in surface waters. If not monitored closely, the presence of these emerging pollutants will negatively affect the quality of the dam water both at spatial and temporal scales once the dam wall is completed. Pit latrines and wastewater treatment plants are a significant source of non-point source pollution. The results of this study will add to the ongoing efforts on water quality remediation by recording the spatial and seasonal variations in water quality across various water sources within the study area. The study also provides a baseline for future water quality fitness-for-use and compliance assessments. By these findings and conclusions, it is recommended that a long-term continuous monitoring programme be implemented, especially in areas where increased agricultural activities have been observed. Monitoring should be implemented for the Tsitsa River, its tributaries, and selected drinking water sources which showed the highest number of non-compliances and microbial contamination. All anthropogenic activities in the catchment areas of these sources, both upstream and downstream of the proposed dam wall, must be monitored and strictly managed to prevent and mitigate their possible impacts. Specific emphasis should be placed on agricultural development, which should be controlled to ensure sustainable livestock and cropping practises. Sanitation facilities, systems and community programmes should be put in place to minimise microbial contamination. It would be beneficial for the Department of Water and Sanitation office responsible for the Mzimvubu water resources to establish a central database for all information concerning the water quality of their water resources including the findings in this report. The database must be freely accessible to the residents of the Mzimvubu catchment.
- Full Text:
- Date Issued: 2018
- Authors: Mutingwende, Nhamo
- Date: 2018
- Subjects: Water quality -- South Africa Water quality management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9308 , vital:34320
- Description: The Department of Water Affairs as of late reported plans to build two substantial stockpiling dams in the Mzimvubu Catchment. The Mzimvubu stream basin is probably one of most prominent and undeveloped basin in South Africa. This is notwithstanding high yearly rainfall, high ecological status, high tourism potential, and appropriateness for afforestation, dryland/rainfed and water system agribusiness. Hence, the Department of Water Affairs researched the capability of building a multipurpose dam in the Mzimvubu catchment to catalyse financial and social improvement. The proposed dam will be based on the Tsitsa River. Often, scientific studies related to dam construction concentrate more on discovering the most, in fact, accessible place to construct it, than on the long haul socio-natural issues that come in its preparation. The water quality of the Tsitsa River, its tributaries and the underground drinking water sources within the Mzimvubu catchment are most likely to change once the dam wall is completed. Surface water resources are susceptible to chemical, physical, microbiological contamination and the so-called emerging pollutants either, through human or natural activities. A comprehensive baseline study on the water quality of the Mzimvubu water resources regarding traces of emerging pollutants and water quality determinants (physical, chemical and microbial) pre-dam construction is therefore essential. The objective of the water quality section of this study was to perform an in-depth analysis of water quality in the study area to form a baseline for future studies on how the built dam may affect these. The approach was to assess the spatial and seasonal variations of the pollutants (pharmaceuticals and pesticides) and water quality determinants for all water sources most likely to be affected by the development of the dam. The fitness-for-use and compliance assessments were conducted to assess if the current water resources are fit-for-use for various categories of use and if they comply with various water quality standards and guidelines as determined by the Department of Water Affairs and Forestry. Department of Water Affairs and Forestry is the overseer of South Africa's water assets, and its central goal is to keep up the fitness-for-use of water on a sustained basis. Water samples (500ml) were collected from sixteen (16) sample points, ranging from the proposed mouth of the dam to the N2 bridge point of the Tsitsa River. Points were selected where the Tsitsa River was accessible using the dam project development roads or where tributaries to the Tsitsa River were accessible using dam development roads. Taps/groundwater sources were sampled from the five selected villages. Monthly samples were collected upstream and downstream of the proposed dam wall, from June 2015 to April 2017.Seventeen (17) water quality indices were therefore analysed at sixteen sampling sites, over a two year period. The AB SCIEX TripleTOF™5600 LC/MS/MS was used to screen for pharmaceutical and pesticide pollutants. All the water quality indices were analysed using the AL400 Aqua lytic photometer, and the microbial analysis was done using the Rand Water Method Number 1.2.2.09.1 for enumerating the amount of E. coli and coliforms in the water samples (Rand Water, 2010f). The South African Water Quality Guidelines, Volumes 1 to 7 (DWS, 1996a-g) were used to assess the fitness-for-use of the water sources. To confirm the compliance of the water resources to various standards and guidelines, the water quality data were assessed against international and national guidelines and standards i.e. the WHO guideline, South African water quality guidelines (domestic, irrigation, livestock and watering, aquaculture, and aquatic ecosystems), and the SANS: 241 (2015) standard for drinking water. Non-parametric statistics were utilised to ascertain the changeability, which is a measure of how water quality may vary after some time. With non-parametric insights, the interquartile extent, which lies between the 25th and the 75th percentile, was utilised to depict inconstancy. The median value (50th percentile) was used as an indication of the central tendency or average. The 90th percentile was included as it can be used to assess the frequency of excursions into higher and possibly unacceptable water quality conditions. 3D Sigma plot was used to graphical present the spatial and seasonal variations of water quality indices and emerging pollutants against their concentrations. Fundamental statistical properties and correlations of water quality variables from the Tsitsa River, Tsitsa River tributaries and the drinking water sources were examined using SAS descriptive statistics. The water quality was determined to be of relatively sound quality, based on the comparison with guidelines and standards for the various intended uses, even though some of the water quality determinants were non-compliant and were “unacceptable” regarding fitness for purpose. The water quality of the Ntabalenga dam would most probably be affected by natural influences (for example rainfall, weathering and geological composition) and anthropogenic factors through non-point source pollution from agriculture activities, human settlements (pit latrines and open defecation) as well as industrial activities in the Maclear and Tsolo towns (wastewater treatments plants effluent, hospital effluent). The Tsitsa River had the highest number of non-compliances, especially to the World Health Organisation and Department of Water and Sanitation aquaculture guidelines. Therefore, the Tsitsa River’s water quality would be a significant factor that could compromise the water quality of the water collected in the dam. The human settlement conditions and agricultural inputs seem to be the factors contributing most to contamination of the surface water of the catchment area. The lack of sanitation systems and facilities means that community members have to use the bush and rivers for ablutions, thus contributing to microbial contamination of the environment. The direct application of manure and fertilisers on the fields by farmers further exacerbates microbial contamination and high nutrient inputs into the environment as observed in elevated microbial and phosphate contaminants during the study period. The data obtained from the analysis of pesticides and pharmaceuticals confirmed the contamination of the drinking water sources, the Tsitsa River and its tributaries with pesticides and pharmaceuticals through non-point source pollution. The origins of these pharmaceutical contaminants were identified as the pit latrines, open defecation and wastewater treatment plant effluent, while agricultural application of pesticides was identified as the source of pesticides in surface waters. If not monitored closely, the presence of these emerging pollutants will negatively affect the quality of the dam water both at spatial and temporal scales once the dam wall is completed. Pit latrines and wastewater treatment plants are a significant source of non-point source pollution. The results of this study will add to the ongoing efforts on water quality remediation by recording the spatial and seasonal variations in water quality across various water sources within the study area. The study also provides a baseline for future water quality fitness-for-use and compliance assessments. By these findings and conclusions, it is recommended that a long-term continuous monitoring programme be implemented, especially in areas where increased agricultural activities have been observed. Monitoring should be implemented for the Tsitsa River, its tributaries, and selected drinking water sources which showed the highest number of non-compliances and microbial contamination. All anthropogenic activities in the catchment areas of these sources, both upstream and downstream of the proposed dam wall, must be monitored and strictly managed to prevent and mitigate their possible impacts. Specific emphasis should be placed on agricultural development, which should be controlled to ensure sustainable livestock and cropping practises. Sanitation facilities, systems and community programmes should be put in place to minimise microbial contamination. It would be beneficial for the Department of Water and Sanitation office responsible for the Mzimvubu water resources to establish a central database for all information concerning the water quality of their water resources including the findings in this report. The database must be freely accessible to the residents of the Mzimvubu catchment.
- Full Text:
- Date Issued: 2018
Stewardship and collaboration in multifunctional landscapes: a transdisciplinary enquiry
- Authors: Cockburn, Jessica Jane
- Date: 2018
- Subjects: Environmental management -- South Africa , Sustainable development -- South Africa , Ecosystem management -- South Africa , Social ecology -- South Africa , Interdisciplinary research
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61267 , vital:27998
- Description: Social-ecological sustainability challenges, from the local to the global level, are of increasing concern. Stewardship has been proposed as a means of dealing with these challenges, but how can it be achieved in practice? In South Africa, the concept is put into practice by practitioners working with local stewards to facilitate more sustainable and equitable management of ecosystem services across landscapes. This landscape approach requires collaboration between multiple stakeholders, as social-ecological processes function beyond the boundaries of individual farms or villages. The aim of this research was to investigate the practice of stewardship and collaboration in multifunctional landscapes in South Africa through a transdisciplinary enquiry. This was achieved using a methodological framework based on critical complexity, transdisciplinarity, and critical realism. This framework was applied through an inductive, mixed methods research design which involved stewardship practitioners, stewards, and other stakeholders in the research. Practitioners' understandings of the stewardship concept vary, yet they coalesce around the idea of responsible use and care of nature. Accordingly, the primary role of stewards is to interact with nature responsibly and carefully, balancing the use of ecosystem services for their own benefit with broader social- ecological interests and needs. Although the biodiversity stewardship tool dominates stewardship practice in South Africa, more integrated social-ecological initiatives are also emerging, often hand-in-hand with this approach. Practitioners working in these initiatives face multiple interacting and mutually reinforcing enablers and barriers that facilitate or hinder collaboration for stewardship. Individual and social-relational enablers are pivotal to long-term sustainability of initiatives, whilst deep-seated inequalities and mistrust are significant barriers to collaboration. Despite such challenges, practitioners are succeeding in fostering collaboration by operating as hubs in the landscape. They are actively building new relationships and networks among diverse stakeholders to address shared sustainability challenges. This results in a patchwork of collaborative stewardship activity across the landscape, suggesting that stewardship and collaboration are fundamentally relational processes and that pluralistic approaches to sustainability are needed in multifunctional landscapes. Moreover, by re-focusing stewardship on stewards, practitioners are finding innovative ways to enable farmers to appreciate and practice stewardship, addressing the conflict between agriculture and conservation. Drawing on these findings, a critical realist analysis revealed underlying generative mechanisms that help to explain the challenges encountered in collaborative efforts toward stewardship. These mechanisms included, amongst others: individual stewards' values, societal constraints on the ability of stewards to express care, conflict between agriculture and conservation due to dominant agricultural approaches and neoliberal economic policies, and the divided and unequal nature of South African society. Operationalising transdisciplinary research enabled meaningful engagement with practitioner partners, allowing for novel insights and unexpected findings to emerge from practice-based knowledge. Putting transdisciplinarity into practice revealed the dynamic and multi-faceted role that researchers can play in transdisciplinary research, highlighting the importance of relational knowledge and competencies. Existing support systems and incentives within universities need to be re-configured to enable postgraduate students to conduct engaged science in service of society. , Kuyanda ukuxhalatyiswa yimiceli mngeni yobudlewlane obuhlala buhleli bezentlalo nendalo, ekuhlaleni nakwihlabathi. Kuphakanyiswe umbono wobugosa-bumeli (ubuphathi bendalo, stewardship) ukuze kuhlangatyezwane nale miceli mngeni, kodwa iza kwenziwa njani le nto? EMzantsi Afrika le ngcamango iye yabekwa entsebenzweni ngabo banezakhono no bugcisa besebenza namagosa-bameli asekuhlaleni, benceda ekulawulweni ngendlela ehlala ihleli nelinganayo iinkonzo zobudlelwane nendalo kuyo yonke imihlaba. Le ndlela yokusebenzisa le mihlaba ifuna intsebenziswano phakathi kwabo bonke ababandakanyekayo, njengoko ubudlelwane bentlalo nendalo busebenza ngaphaya kwemida yomfama ngamnye okanye iilali. Injongo yoluhlolisiso ibikukuphanda ngoqheliselo lobugosa-bumeli nentsebenziswano yeemihlaba esebenza ngendlela ezininzi eMzantsi Afrika kubuzwa kumasebe olwazi ohlukeneyo olwazi(transdisciplinarity). Oku kwathi kwaphunyezwa ngenkqubo ehlola izinto ezahlukahlukeneyo kwimigangatho eyahlukeneyo, isekelwe kwingcamango enzulu kunoko kubonakala kuqondakalayo, kumasebe olwazi ohlukeneyo, nakulwazi lwesayensi nentlalo. Le nkqubo yenziwa kusetyenziswa inkqubo yokuqokelela ulwazi luze luhlalutywe, iintlobo ezahlukeneyo zokwenza uhlolisiso, ezazibandakandakanya abanezakhono zobugosa-bumeli, amagosa-bameli nabanye ababandakanyekileyo kolu hlolisiso. Ingcamango zabanezakhono zobubugosa-bumeli ziyohluka, kanti iingcamango zinye ngokuphathelele ukusetyenziswa nokukhathelela indalo yemvelo. Phofu ke, indima esisiseko yamagosa-bameli kukuphembelelana ngokufanelekileyo nangenkathalo nendalo, bethelekisa ukusebenzisa iinkonzo zobudlelwane nendalo ukuze zincede bona, kunye nomdla neemfuno eziphangaleleyo zobudlelwane bendalo nentlalo. Nakubeni isixhobo Sobugosa-Bumeli Bendalo Eyahlukeneyo Yezityalo Nezilwanyana (Biodiversity Stewardship) isesona sitshotsha phambili kuqheliselo lobugosa-bumeli eMzantsi Afrika, zikhona nezinye izixhobo ezivelayo eziqukwayo kwiphulo lobudlelwane bendalo nentlalo, ezisoloko zisebenza kakuhle neli lokuqala. Abanezakhono nabasebenza kula maphulo bajamelene neendidi zokuphembelelana, iingxaki ezahlukeneyo, izisombululo nezithinteli ezinceda okanye zonakalise intebenziswano yobugosa-bumeli. Isisombululo ngasinye nezo zayanyaniswa nentlalo zibaluleke gqitha kumaphulo azakuhlala ehleli, nakubeni ukungalingani okuzinze nzulu nokungathembani iyimiqobo ebelulekileyo kwintsebenziswano. Nangona ikhona le micelimngeni, abanezakhono bayaphumelela ekukhuliseni intsebenziswano ngokuthi basebenze kwiindawo ezithile kwimihlaba. Bakha unxulumano olutsha noqhagamishelwano nababandakanyekileyo ngokwahluka kwabo ukuze kusingathwe nemiceli mngeni yokugcina ubudlelwane bendalo nentlalo buhlale buhleli. Oku kuye kwaphumela kwintsebenziswano yobugosa-bumeli ethe yakho pha na pha kule mihlaba, nto leyo ebonisa ukuba ubugosa- bumeli nentsebenziswano ngokusisiseko yinkqubo enxulumeneyo, kwaye iindlela ezininzi zokwenza ubudlelwane bendalo nentlalo buhlale buhleli ziyimfuneko kwimihlaba ekwenziwa izinto ezininzi kuyo. Ngapha koko, ngokuthi kuphindwe kunikelwe ingqalelo kubugosa-bumeli isiya kumagosa bameli, abanezakhono bafumana iindlela ezintsha zokunceda amafama axabise aze aqhelisele ubugosa-bumeli, ngolu hlobo kusingathwa ingxabano phakathi kwezolimo nolondolozo lwendalo. Xa sifunda koku, ukucamngca nzulu ngako kutyhile enye indlela eye yanceda ekucaciseni imiceli mngeni ekuhlangatyezwane nayo kwimigudu yentsebenziswano yobugosa-bumeli. Ezi ndlela zibandakanya, phakathi kwezinye: indlela aziphatha ngayo amagosa-bameli, iingcinezelo yabahlali ekubeni amagosa-bameli abonakalise inkathalo, ukungavisisani phakathi kwezolimo nolondolozo lwendalo ngenxa yendlela ezongamelayo nezisetyenziswayo zolimo, nemigaqo-nkqubo yezoqoqosho elawulwa bucala, nokwahlukana, ukungalingani kwabantu baseMzantsi Afrika. Ukusebenzisa uhlolisiso lwamasebe olwazi ohlukeneyo kubangele ukufuthelana okunentsingiselo namaqabane abo banezakhono, oku kuvulele iingcamango ezinzulu nokufumana izinto ebezingalindelekanga kulwazi olusekelwe kuqheliselo. Ukubeka ulwazi lwamasebe ahlukeneyo entsebenzweni kutyhile iindima ezahlukeneyo okanye ezininzi ezidlalwa ngabahlolisisi kuhlolisiso lolwazi lwamasebe ohlukeneyo, kubalaseliswa ukubaluleka kolwazi olunxulunyaniswayo nozimiselo. Iinkqubo zenkxaso nezinye izinto ezincedayo ezikhoyo kwiyunivesiti kufuneka ziphinde zakhiwe ukuze zincede abafundi abenza uhlolisiso balwenze benomfutho wesayensi enceda abahlali.
- Full Text:
- Date Issued: 2018
- Authors: Cockburn, Jessica Jane
- Date: 2018
- Subjects: Environmental management -- South Africa , Sustainable development -- South Africa , Ecosystem management -- South Africa , Social ecology -- South Africa , Interdisciplinary research
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61267 , vital:27998
- Description: Social-ecological sustainability challenges, from the local to the global level, are of increasing concern. Stewardship has been proposed as a means of dealing with these challenges, but how can it be achieved in practice? In South Africa, the concept is put into practice by practitioners working with local stewards to facilitate more sustainable and equitable management of ecosystem services across landscapes. This landscape approach requires collaboration between multiple stakeholders, as social-ecological processes function beyond the boundaries of individual farms or villages. The aim of this research was to investigate the practice of stewardship and collaboration in multifunctional landscapes in South Africa through a transdisciplinary enquiry. This was achieved using a methodological framework based on critical complexity, transdisciplinarity, and critical realism. This framework was applied through an inductive, mixed methods research design which involved stewardship practitioners, stewards, and other stakeholders in the research. Practitioners' understandings of the stewardship concept vary, yet they coalesce around the idea of responsible use and care of nature. Accordingly, the primary role of stewards is to interact with nature responsibly and carefully, balancing the use of ecosystem services for their own benefit with broader social- ecological interests and needs. Although the biodiversity stewardship tool dominates stewardship practice in South Africa, more integrated social-ecological initiatives are also emerging, often hand-in-hand with this approach. Practitioners working in these initiatives face multiple interacting and mutually reinforcing enablers and barriers that facilitate or hinder collaboration for stewardship. Individual and social-relational enablers are pivotal to long-term sustainability of initiatives, whilst deep-seated inequalities and mistrust are significant barriers to collaboration. Despite such challenges, practitioners are succeeding in fostering collaboration by operating as hubs in the landscape. They are actively building new relationships and networks among diverse stakeholders to address shared sustainability challenges. This results in a patchwork of collaborative stewardship activity across the landscape, suggesting that stewardship and collaboration are fundamentally relational processes and that pluralistic approaches to sustainability are needed in multifunctional landscapes. Moreover, by re-focusing stewardship on stewards, practitioners are finding innovative ways to enable farmers to appreciate and practice stewardship, addressing the conflict between agriculture and conservation. Drawing on these findings, a critical realist analysis revealed underlying generative mechanisms that help to explain the challenges encountered in collaborative efforts toward stewardship. These mechanisms included, amongst others: individual stewards' values, societal constraints on the ability of stewards to express care, conflict between agriculture and conservation due to dominant agricultural approaches and neoliberal economic policies, and the divided and unequal nature of South African society. Operationalising transdisciplinary research enabled meaningful engagement with practitioner partners, allowing for novel insights and unexpected findings to emerge from practice-based knowledge. Putting transdisciplinarity into practice revealed the dynamic and multi-faceted role that researchers can play in transdisciplinary research, highlighting the importance of relational knowledge and competencies. Existing support systems and incentives within universities need to be re-configured to enable postgraduate students to conduct engaged science in service of society. , Kuyanda ukuxhalatyiswa yimiceli mngeni yobudlewlane obuhlala buhleli bezentlalo nendalo, ekuhlaleni nakwihlabathi. Kuphakanyiswe umbono wobugosa-bumeli (ubuphathi bendalo, stewardship) ukuze kuhlangatyezwane nale miceli mngeni, kodwa iza kwenziwa njani le nto? EMzantsi Afrika le ngcamango iye yabekwa entsebenzweni ngabo banezakhono no bugcisa besebenza namagosa-bameli asekuhlaleni, benceda ekulawulweni ngendlela ehlala ihleli nelinganayo iinkonzo zobudlelwane nendalo kuyo yonke imihlaba. Le ndlela yokusebenzisa le mihlaba ifuna intsebenziswano phakathi kwabo bonke ababandakanyekayo, njengoko ubudlelwane bentlalo nendalo busebenza ngaphaya kwemida yomfama ngamnye okanye iilali. Injongo yoluhlolisiso ibikukuphanda ngoqheliselo lobugosa-bumeli nentsebenziswano yeemihlaba esebenza ngendlela ezininzi eMzantsi Afrika kubuzwa kumasebe olwazi ohlukeneyo olwazi(transdisciplinarity). Oku kwathi kwaphunyezwa ngenkqubo ehlola izinto ezahlukahlukeneyo kwimigangatho eyahlukeneyo, isekelwe kwingcamango enzulu kunoko kubonakala kuqondakalayo, kumasebe olwazi ohlukeneyo, nakulwazi lwesayensi nentlalo. Le nkqubo yenziwa kusetyenziswa inkqubo yokuqokelela ulwazi luze luhlalutywe, iintlobo ezahlukeneyo zokwenza uhlolisiso, ezazibandakandakanya abanezakhono zobugosa-bumeli, amagosa-bameli nabanye ababandakanyekileyo kolu hlolisiso. Ingcamango zabanezakhono zobubugosa-bumeli ziyohluka, kanti iingcamango zinye ngokuphathelele ukusetyenziswa nokukhathelela indalo yemvelo. Phofu ke, indima esisiseko yamagosa-bameli kukuphembelelana ngokufanelekileyo nangenkathalo nendalo, bethelekisa ukusebenzisa iinkonzo zobudlelwane nendalo ukuze zincede bona, kunye nomdla neemfuno eziphangaleleyo zobudlelwane bendalo nentlalo. Nakubeni isixhobo Sobugosa-Bumeli Bendalo Eyahlukeneyo Yezityalo Nezilwanyana (Biodiversity Stewardship) isesona sitshotsha phambili kuqheliselo lobugosa-bumeli eMzantsi Afrika, zikhona nezinye izixhobo ezivelayo eziqukwayo kwiphulo lobudlelwane bendalo nentlalo, ezisoloko zisebenza kakuhle neli lokuqala. Abanezakhono nabasebenza kula maphulo bajamelene neendidi zokuphembelelana, iingxaki ezahlukeneyo, izisombululo nezithinteli ezinceda okanye zonakalise intebenziswano yobugosa-bumeli. Isisombululo ngasinye nezo zayanyaniswa nentlalo zibaluleke gqitha kumaphulo azakuhlala ehleli, nakubeni ukungalingani okuzinze nzulu nokungathembani iyimiqobo ebelulekileyo kwintsebenziswano. Nangona ikhona le micelimngeni, abanezakhono bayaphumelela ekukhuliseni intsebenziswano ngokuthi basebenze kwiindawo ezithile kwimihlaba. Bakha unxulumano olutsha noqhagamishelwano nababandakanyekileyo ngokwahluka kwabo ukuze kusingathwe nemiceli mngeni yokugcina ubudlelwane bendalo nentlalo buhlale buhleli. Oku kuye kwaphumela kwintsebenziswano yobugosa-bumeli ethe yakho pha na pha kule mihlaba, nto leyo ebonisa ukuba ubugosa- bumeli nentsebenziswano ngokusisiseko yinkqubo enxulumeneyo, kwaye iindlela ezininzi zokwenza ubudlelwane bendalo nentlalo buhlale buhleli ziyimfuneko kwimihlaba ekwenziwa izinto ezininzi kuyo. Ngapha koko, ngokuthi kuphindwe kunikelwe ingqalelo kubugosa-bumeli isiya kumagosa bameli, abanezakhono bafumana iindlela ezintsha zokunceda amafama axabise aze aqhelisele ubugosa-bumeli, ngolu hlobo kusingathwa ingxabano phakathi kwezolimo nolondolozo lwendalo. Xa sifunda koku, ukucamngca nzulu ngako kutyhile enye indlela eye yanceda ekucaciseni imiceli mngeni ekuhlangatyezwane nayo kwimigudu yentsebenziswano yobugosa-bumeli. Ezi ndlela zibandakanya, phakathi kwezinye: indlela aziphatha ngayo amagosa-bameli, iingcinezelo yabahlali ekubeni amagosa-bameli abonakalise inkathalo, ukungavisisani phakathi kwezolimo nolondolozo lwendalo ngenxa yendlela ezongamelayo nezisetyenziswayo zolimo, nemigaqo-nkqubo yezoqoqosho elawulwa bucala, nokwahlukana, ukungalingani kwabantu baseMzantsi Afrika. Ukusebenzisa uhlolisiso lwamasebe olwazi ohlukeneyo kubangele ukufuthelana okunentsingiselo namaqabane abo banezakhono, oku kuvulele iingcamango ezinzulu nokufumana izinto ebezingalindelekanga kulwazi olusekelwe kuqheliselo. Ukubeka ulwazi lwamasebe ahlukeneyo entsebenzweni kutyhile iindima ezahlukeneyo okanye ezininzi ezidlalwa ngabahlolisisi kuhlolisiso lolwazi lwamasebe ohlukeneyo, kubalaseliswa ukubaluleka kolwazi olunxulunyaniswayo nozimiselo. Iinkqubo zenkxaso nezinye izinto ezincedayo ezikhoyo kwiyunivesiti kufuneka ziphinde zakhiwe ukuze zincede abafundi abenza uhlolisiso balwenze benomfutho wesayensi enceda abahlali.
- Full Text:
- Date Issued: 2018
Strategies used by teachers to promote reading in grade 4 : a case of english first additional language learners
- Authors: Fesi, Liziwe
- Date: 2018
- Subjects: English language -- Study and teaching English language -- Rhetoric Reading -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9264 , vital:34316
- Description: The study examines strategies used by teachers to promote reading: A Case of English First Additional Language Learners. The study was located within the constructivism paradigm of reading and used a qualitative research approach that incorporated a case study research design in the collection, analysis and interpretation of the data. The data instruments used were interviews and observations. Data were analyzed using non-statistical procedures. The findings of the study revealed that reading problems are still eminent in Grade Four. It was found that the resources in schools inhibits the progress to promote reading. The educational system is underdeveloped and under resourced with respect to reading materials, and schools are in a bad state due to obsolete facilities. Inadequate infrastructure is also another challenge since most of the participants reported that classes are overcrowded; thus, limiting the space to interact with learners. It was found that primary schools have no libraries; as a result, it was difficult for the teachers to instill the culture of reading. Some participants revealed that technology can be useful to encourage reading, however, their schools have no computer centers and most teachers do not know how to use computers. It emerged from the findings that parents fail to involve themselves in their children’s education. In addition, it was found that poor socio-economic backgrounds affect many homes, and this has a negative impact on schools. Most South African parents are found to be unable to support their children at all. There are also challenges interconnected with the English First Additional Language learners, the eccentricities of the English language, the teacher training and continuing professional development of teachers, as it emerged from the findings of this study that most teachers do not understand the reading strategies, skills of teaching reading and learners lack vocabulary, hence their resistance to reading. A comprehensive model of strategies to improve reading in primary schools was developed by the researcher based on the findings of the study and an extensive literature review.
- Full Text:
- Date Issued: 2018
- Authors: Fesi, Liziwe
- Date: 2018
- Subjects: English language -- Study and teaching English language -- Rhetoric Reading -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/9264 , vital:34316
- Description: The study examines strategies used by teachers to promote reading: A Case of English First Additional Language Learners. The study was located within the constructivism paradigm of reading and used a qualitative research approach that incorporated a case study research design in the collection, analysis and interpretation of the data. The data instruments used were interviews and observations. Data were analyzed using non-statistical procedures. The findings of the study revealed that reading problems are still eminent in Grade Four. It was found that the resources in schools inhibits the progress to promote reading. The educational system is underdeveloped and under resourced with respect to reading materials, and schools are in a bad state due to obsolete facilities. Inadequate infrastructure is also another challenge since most of the participants reported that classes are overcrowded; thus, limiting the space to interact with learners. It was found that primary schools have no libraries; as a result, it was difficult for the teachers to instill the culture of reading. Some participants revealed that technology can be useful to encourage reading, however, their schools have no computer centers and most teachers do not know how to use computers. It emerged from the findings that parents fail to involve themselves in their children’s education. In addition, it was found that poor socio-economic backgrounds affect many homes, and this has a negative impact on schools. Most South African parents are found to be unable to support their children at all. There are also challenges interconnected with the English First Additional Language learners, the eccentricities of the English language, the teacher training and continuing professional development of teachers, as it emerged from the findings of this study that most teachers do not understand the reading strategies, skills of teaching reading and learners lack vocabulary, hence their resistance to reading. A comprehensive model of strategies to improve reading in primary schools was developed by the researcher based on the findings of the study and an extensive literature review.
- Full Text:
- Date Issued: 2018
Strength and conditioning of adolescent male cricket players
- Authors: Pote, Lee
- Date: 2018
- Subjects: Cricket South Africa , Cricket injuries South Africa , Cricket Physiological aspects , Cricket Coaching South Africa , Physical fitness for youth South Africa , CricFit
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63933 , vital:28508
- Description: Background: Modern day cricketers are faced with longer, more strenuous seasons which are more physically demanding than the traditional forms of the game. Due to these increased physical demands, players are more prone to both overuse injuries, particularly of the lower back (bowlers) and lower limbs (batsmen), as well as acute, impact injuries (fielders/wicket keepers). The increase in injury risk is of particular concern at younger levels as research has shown that adolescents are at a higher risk for injury than their adult counterparts. Therefore, there is a need for strength and conditioning programs that reduce the risk of injury and improve performance at this level. However, of the programs that are available, most are not multi-factorial in nature and are aimed at elite cricketers. This is of concern in low-to-middle income countries such as South Africa, where players often do not have access to facilities or equipment and thus need to be exposed to low-cost, no-cost training programs. Furthermore, most information is anecdotal and there is a distinct lack of injury prevention programs at an adolescent level. Objective: The purpose of this thesis was to investigate the strength and conditioning practices of adolescent cricket players, particularly from a South African context, where there is a distinct lack of resources. This was through the completion of three phases; firstly, a literature review was completed to determine the information currently available on injury prevention strategies in cricket. The review also examined the injury statistics of five major playing cricket nations. Secondly, a survey was conducted to determine the current strength and conditioning practices of schoolboy and university coaches in South Africa. Lastly, a novel intervention program (CricFit) was designed and implemented within an adolescent population. The main purpose of the intervention was to determine whether players’ physical fitness parameters improved over time and whether the risk of injury was reduced. Methods: For phase one of the thesis (review paper), a search of the different scientific databases was undertaken to determine the nature and incidence of injuries in cricket activity as well as well as current strength and conditioning practices in place to reduce these injuries. These injury statistics and prevention programs where then reviewed. For the survey based research, an online questionnaire, adapted from previous strength and conditioning studies, was sent to 38 school boy and 12 university teams that participated in the top competitions in South Africa. In addition to the previous questionnaires, cricket specific practices and injury statistic questions were added to the survey. The survey consisted of three sections: a general, cricket specific and injury and injury prevention section. The survey also allowed coaches at both university and school levels to describe their practices and ideas in order to understand their basic knowledge of scientifically-based principles of strength and conditioning. Thus coaches were encouraged to explain what conditioning practices they implemented through a number of open ended questions which were then analysed for minor and major themes. The focus of the intervention program was to improve general physical fitness for cricket players. The study was a pre- and post-test design where twenty eight schoolboy cricketers (aged 15-19 years) were allocated to a control (n=14) or experimental (n=14) group during the cricket pre-season period. Both groups performed traditional net and field based training over a four week period (one net and one field based session), with the experimental group performing an additional two, 35-45 minute, conditioning sessions per week (“CricFit” intervention program). The intervention consisted of exercises that centred on the movement demands associated with the sport of cricket as well as injury prevention exercises (specifically Nordic lowers and core strength). Prior to and post the four week intervention period, responses were measured using a test battery that was designed to replicate the demands of cricket activity. Results: The results indicate on overall thesis summary. The literature view showed that there is a limited amount of injury prevention programs available for adolescent cricket players. It was also confirmed that for both adolescent and adult players, fast bowlers (lower back), followed by batsmen (lower limbs) and then fielders (impact) are the most prone to injuries. The survey showed that schools and universities in South Africa do conduct some form of conditioning, workload monitoring and injury prevention exercises; however the incorrect practices are being administered when considering the movement demands and most common injuries in cricket. It was also shown that most coaches did not have the adequate qualifications and experience to implement acceptable strength and conditioning programs. For the intervention study, both the control and experimental groups showed significant (p<0.05) improvements in most responses, but the changes for the experimental group were greater than those shown in the control group. Furthermore, significant (p<0.05) changes were shown between the two groups (control vs. experimental) for percentage body fat (12 vs. 11%), sit and reach flexibility (40.79 vs. 80.50mm), plank time (105.36 vs. 185.29s), 20 m sprint time (3.27 vs. 2.84s), push ups (34 vs. 41) and 25 m shuttle distance (699.18 vs. 746.79m). Conclusion: Coaches need to be educated and trained to implement the correct strength and conditioning practices at an adolescent level as well as to better understand the link between the movement demands and principles of testing and training. An improved education process may be needed to improve the quality as well as the qualifications of strength and conditioning coaches. If coaches and trainers are educated properly, then the “CricFit” intervention program may be used to improve cricket specific fitness throughout the pre-season period. The “CricFit” programme is useful in countries such as South Africa, where often players do not have access to coaches and facilities and thus can be implemented easily with minimal cost.
- Full Text:
- Date Issued: 2018
- Authors: Pote, Lee
- Date: 2018
- Subjects: Cricket South Africa , Cricket injuries South Africa , Cricket Physiological aspects , Cricket Coaching South Africa , Physical fitness for youth South Africa , CricFit
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63933 , vital:28508
- Description: Background: Modern day cricketers are faced with longer, more strenuous seasons which are more physically demanding than the traditional forms of the game. Due to these increased physical demands, players are more prone to both overuse injuries, particularly of the lower back (bowlers) and lower limbs (batsmen), as well as acute, impact injuries (fielders/wicket keepers). The increase in injury risk is of particular concern at younger levels as research has shown that adolescents are at a higher risk for injury than their adult counterparts. Therefore, there is a need for strength and conditioning programs that reduce the risk of injury and improve performance at this level. However, of the programs that are available, most are not multi-factorial in nature and are aimed at elite cricketers. This is of concern in low-to-middle income countries such as South Africa, where players often do not have access to facilities or equipment and thus need to be exposed to low-cost, no-cost training programs. Furthermore, most information is anecdotal and there is a distinct lack of injury prevention programs at an adolescent level. Objective: The purpose of this thesis was to investigate the strength and conditioning practices of adolescent cricket players, particularly from a South African context, where there is a distinct lack of resources. This was through the completion of three phases; firstly, a literature review was completed to determine the information currently available on injury prevention strategies in cricket. The review also examined the injury statistics of five major playing cricket nations. Secondly, a survey was conducted to determine the current strength and conditioning practices of schoolboy and university coaches in South Africa. Lastly, a novel intervention program (CricFit) was designed and implemented within an adolescent population. The main purpose of the intervention was to determine whether players’ physical fitness parameters improved over time and whether the risk of injury was reduced. Methods: For phase one of the thesis (review paper), a search of the different scientific databases was undertaken to determine the nature and incidence of injuries in cricket activity as well as well as current strength and conditioning practices in place to reduce these injuries. These injury statistics and prevention programs where then reviewed. For the survey based research, an online questionnaire, adapted from previous strength and conditioning studies, was sent to 38 school boy and 12 university teams that participated in the top competitions in South Africa. In addition to the previous questionnaires, cricket specific practices and injury statistic questions were added to the survey. The survey consisted of three sections: a general, cricket specific and injury and injury prevention section. The survey also allowed coaches at both university and school levels to describe their practices and ideas in order to understand their basic knowledge of scientifically-based principles of strength and conditioning. Thus coaches were encouraged to explain what conditioning practices they implemented through a number of open ended questions which were then analysed for minor and major themes. The focus of the intervention program was to improve general physical fitness for cricket players. The study was a pre- and post-test design where twenty eight schoolboy cricketers (aged 15-19 years) were allocated to a control (n=14) or experimental (n=14) group during the cricket pre-season period. Both groups performed traditional net and field based training over a four week period (one net and one field based session), with the experimental group performing an additional two, 35-45 minute, conditioning sessions per week (“CricFit” intervention program). The intervention consisted of exercises that centred on the movement demands associated with the sport of cricket as well as injury prevention exercises (specifically Nordic lowers and core strength). Prior to and post the four week intervention period, responses were measured using a test battery that was designed to replicate the demands of cricket activity. Results: The results indicate on overall thesis summary. The literature view showed that there is a limited amount of injury prevention programs available for adolescent cricket players. It was also confirmed that for both adolescent and adult players, fast bowlers (lower back), followed by batsmen (lower limbs) and then fielders (impact) are the most prone to injuries. The survey showed that schools and universities in South Africa do conduct some form of conditioning, workload monitoring and injury prevention exercises; however the incorrect practices are being administered when considering the movement demands and most common injuries in cricket. It was also shown that most coaches did not have the adequate qualifications and experience to implement acceptable strength and conditioning programs. For the intervention study, both the control and experimental groups showed significant (p<0.05) improvements in most responses, but the changes for the experimental group were greater than those shown in the control group. Furthermore, significant (p<0.05) changes were shown between the two groups (control vs. experimental) for percentage body fat (12 vs. 11%), sit and reach flexibility (40.79 vs. 80.50mm), plank time (105.36 vs. 185.29s), 20 m sprint time (3.27 vs. 2.84s), push ups (34 vs. 41) and 25 m shuttle distance (699.18 vs. 746.79m). Conclusion: Coaches need to be educated and trained to implement the correct strength and conditioning practices at an adolescent level as well as to better understand the link between the movement demands and principles of testing and training. An improved education process may be needed to improve the quality as well as the qualifications of strength and conditioning coaches. If coaches and trainers are educated properly, then the “CricFit” intervention program may be used to improve cricket specific fitness throughout the pre-season period. The “CricFit” programme is useful in countries such as South Africa, where often players do not have access to coaches and facilities and thus can be implemented easily with minimal cost.
- Full Text:
- Date Issued: 2018
Students’ perceptions towards the influences of social media on students’ academic engagement at a tertiary institution: a case study on the use of Facebook and Twitter at Rhodes University
- Authors: Moongela, Harry
- Date: 2018
- Subjects: Facebook (Firm) , Twitter (Firm) , Social media in education -- South Africa -- Makhanda , Motivation in education -- South Africa -- Makhanda , Education, Higher -- Effect of technological innovations on -- South Africa -- Makhanda , Rhodes University
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60730 , vital:27823
- Description: The use of social media has become an integral part of student’s academic lives and has had an impact on students’ academic engagement in tertiary institutions. Subsequently, researchers have shown an interest in investigating the impact of social media on students’ academic engagement. Despite the fact that researcher have shown interest, there still remains a limited number of studies that have discussed the effects of social media on students’ academic engagement, particularly within a South African context. Also, studies that have been carried have revealed limited and mixed findings. This study then aims to further investigate whether the exposure of students to social media has an effect on their academic engagement and how tertiary institutions together with students can use social media to improve students’ academic engagement. A qualitative research method using an interpretive (inductive) approach is carried out to find out students’ perceptions towards the use of social media and its influence on students’ academic engagement. The study then reveals recommendations from students’ perceptions on the effective ways of using social media to benefit students’ academic engagement in tertiary institutions.
- Full Text:
- Date Issued: 2018
- Authors: Moongela, Harry
- Date: 2018
- Subjects: Facebook (Firm) , Twitter (Firm) , Social media in education -- South Africa -- Makhanda , Motivation in education -- South Africa -- Makhanda , Education, Higher -- Effect of technological innovations on -- South Africa -- Makhanda , Rhodes University
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60730 , vital:27823
- Description: The use of social media has become an integral part of student’s academic lives and has had an impact on students’ academic engagement in tertiary institutions. Subsequently, researchers have shown an interest in investigating the impact of social media on students’ academic engagement. Despite the fact that researcher have shown interest, there still remains a limited number of studies that have discussed the effects of social media on students’ academic engagement, particularly within a South African context. Also, studies that have been carried have revealed limited and mixed findings. This study then aims to further investigate whether the exposure of students to social media has an effect on their academic engagement and how tertiary institutions together with students can use social media to improve students’ academic engagement. A qualitative research method using an interpretive (inductive) approach is carried out to find out students’ perceptions towards the use of social media and its influence on students’ academic engagement. The study then reveals recommendations from students’ perceptions on the effective ways of using social media to benefit students’ academic engagement in tertiary institutions.
- Full Text:
- Date Issued: 2018
Studies in leaf domatia-mite mutualism in South Africa
- Authors: Situngu, Sivuyisiwe
- Date: 2018
- Subjects: Insect-plant relationships , Mites , Mutualism (Biology) , Biological pest control agents
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63334 , vital:28394
- Description: Plants have various traits which allow them to cope and resist their enemies including both insects and fungi . In some cases such traits allow plants to build mutualistic relationships with natural enemies of plant pests. This is the case in many dicotyledonous plants which produce leaf domatia. Leaf domatia are plant cavities usually found in the axils of major veins in the abaxial side of leaves. They are usually associated with mites and often mediate mutualistic relationships with predacious mites. Mites use leaf domatia primarily for shelter, to reproduce, and to develop. In turn, plants benefit from having predaceous mites on their leaves, because mites act as plant “bodyguards” and offer defence against pathogens and small arthropod herbivores. This phenomenon has been well documented all over the world, but Africa remains disproportionally understudied. The aim of this study was to fill the gap that exists in our knowledge of the extent of the distribution of leaf domatia-mite mutualisms and generate a better understanding of the diversity of mites found within leaf domatia from an African perspective. This was done by surveying plant species that bear leaf domatia from different vegetation types in South Africa. The plants with leaf domatia were examined for the presence of mites in order to determine patterns of mite abundance and diversity and, in so doing, address the following questions: • Does each tree species host have a specific mite or mite assemblage? • Do some mites prefer certain types of leaf domatia? • Do mites prefer a specific place in the tree canopy and does the microclimate in the tree canopy affect the distribution of mites? • Do different vegetation sites and types differ in their mite diversity and species composition? • Does mite abundance and diversity vary with seasons? Do coffee plantations have a different suite of mites than the adjacent forest? The anatomical structures of leaf domatia from six selected plant species(Coffea arabica, Gardenia thunbergia, Rothmannia capensis, Rothmannia globosa (Rubiaceae), Ocotea bullata (Lauraceae) and Tecoma capensis (Bignoniaceae) with different types of leaf domatia were also studied. The results from this study suggested that the key futures which distinguish domatia are the presence of an extra layer of tissue in the lower epidermis, a thick cuticle, cuticular folds, the presence of trichomes and an invagination. This study provides a better understating of the structure of leaf domatia. Leaf domatia bearing plants are widely distributed in South Africa, and species and vegetation-specific associations were assessed. Over 250 plant specimens with leaf domatia were collected and examined and more than 60 different mite species were found in association with the sampled plant species. The majority of mites found within the domatia of these tree species were predaceous and included mites from Stigmatidae, Tydeidae and Phytoseiidae. Furthermore, 15 new species were collected, suggesting that mites are understudied in South Africa. This study showed that the different vegetation types sampled did not differ markedly in terms of their mite biota and that similar mites were found across the region, and the association between leaf domatia and mites was found to be opportunistic and that mites had no preference for any particular domatia types. No host specificity relationship was observed between plants and mites. The assessment of mites associated with Coffea arabica showed that indigenous mites are able to colonise and establish a beneficial mutualism on exotic species. This is important as it ascertains that economically important plants that are cultivated outside their area of natural distribution can still benefit from this mutualism. This study also found that mite abundance and diversity in plants with leaf domatia were influenced by factors such as temperature, relative humidity and rainfall. Mite communities found in association with domatia changed as the year progressed and over the seasons. The seasonal fluctuations varied between the sampled plant species. In addition, this study found that mites were sensitive to extreme environmental conditions, and thus, mites preferred leaves found in the lower parts of the tree canopy and avoided exposed leaves. This study provides a better understanding of the distribution of domatia bearing plants in South Africa and their associated mites and contributes to our knowledge of the biodiversity of mites in the region. Furthermore, this study also adds to our understanding of the leaf domatia - mite mutualism in Africa. The applied example looking at the plant-mite mutualism in Coffea arabica highlights the importance of this mutualism in commercial plants.
- Full Text:
- Date Issued: 2018
- Authors: Situngu, Sivuyisiwe
- Date: 2018
- Subjects: Insect-plant relationships , Mites , Mutualism (Biology) , Biological pest control agents
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63334 , vital:28394
- Description: Plants have various traits which allow them to cope and resist their enemies including both insects and fungi . In some cases such traits allow plants to build mutualistic relationships with natural enemies of plant pests. This is the case in many dicotyledonous plants which produce leaf domatia. Leaf domatia are plant cavities usually found in the axils of major veins in the abaxial side of leaves. They are usually associated with mites and often mediate mutualistic relationships with predacious mites. Mites use leaf domatia primarily for shelter, to reproduce, and to develop. In turn, plants benefit from having predaceous mites on their leaves, because mites act as plant “bodyguards” and offer defence against pathogens and small arthropod herbivores. This phenomenon has been well documented all over the world, but Africa remains disproportionally understudied. The aim of this study was to fill the gap that exists in our knowledge of the extent of the distribution of leaf domatia-mite mutualisms and generate a better understanding of the diversity of mites found within leaf domatia from an African perspective. This was done by surveying plant species that bear leaf domatia from different vegetation types in South Africa. The plants with leaf domatia were examined for the presence of mites in order to determine patterns of mite abundance and diversity and, in so doing, address the following questions: • Does each tree species host have a specific mite or mite assemblage? • Do some mites prefer certain types of leaf domatia? • Do mites prefer a specific place in the tree canopy and does the microclimate in the tree canopy affect the distribution of mites? • Do different vegetation sites and types differ in their mite diversity and species composition? • Does mite abundance and diversity vary with seasons? Do coffee plantations have a different suite of mites than the adjacent forest? The anatomical structures of leaf domatia from six selected plant species(Coffea arabica, Gardenia thunbergia, Rothmannia capensis, Rothmannia globosa (Rubiaceae), Ocotea bullata (Lauraceae) and Tecoma capensis (Bignoniaceae) with different types of leaf domatia were also studied. The results from this study suggested that the key futures which distinguish domatia are the presence of an extra layer of tissue in the lower epidermis, a thick cuticle, cuticular folds, the presence of trichomes and an invagination. This study provides a better understating of the structure of leaf domatia. Leaf domatia bearing plants are widely distributed in South Africa, and species and vegetation-specific associations were assessed. Over 250 plant specimens with leaf domatia were collected and examined and more than 60 different mite species were found in association with the sampled plant species. The majority of mites found within the domatia of these tree species were predaceous and included mites from Stigmatidae, Tydeidae and Phytoseiidae. Furthermore, 15 new species were collected, suggesting that mites are understudied in South Africa. This study showed that the different vegetation types sampled did not differ markedly in terms of their mite biota and that similar mites were found across the region, and the association between leaf domatia and mites was found to be opportunistic and that mites had no preference for any particular domatia types. No host specificity relationship was observed between plants and mites. The assessment of mites associated with Coffea arabica showed that indigenous mites are able to colonise and establish a beneficial mutualism on exotic species. This is important as it ascertains that economically important plants that are cultivated outside their area of natural distribution can still benefit from this mutualism. This study also found that mite abundance and diversity in plants with leaf domatia were influenced by factors such as temperature, relative humidity and rainfall. Mite communities found in association with domatia changed as the year progressed and over the seasons. The seasonal fluctuations varied between the sampled plant species. In addition, this study found that mites were sensitive to extreme environmental conditions, and thus, mites preferred leaves found in the lower parts of the tree canopy and avoided exposed leaves. This study provides a better understanding of the distribution of domatia bearing plants in South Africa and their associated mites and contributes to our knowledge of the biodiversity of mites in the region. Furthermore, this study also adds to our understanding of the leaf domatia - mite mutualism in Africa. The applied example looking at the plant-mite mutualism in Coffea arabica highlights the importance of this mutualism in commercial plants.
- Full Text:
- Date Issued: 2018
Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) population ecology in citrus orchards: the influence of orchard age
- Authors: Albertyn, Sonnica
- Date: 2018
- Subjects: Cryptophlebia leucotreta , Population biology , Insect populations , Orchards , Insect nematodes , Entomopathogenic fungi
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62615 , vital:28213
- Description: Anecdotal reports in the South African citrus industry claim higher populations of false codling moth (FCM), Thaumatotibia (Cryptophlebia) leucotreta (Meyr) (Lepidoptera: Tortricidae), in orchards during the first three to five harvesting years of citrus planted in virgin soil, after which, FCM numbers seem to decrease and remain consistent. Various laboratory studies and field surveys were conducted to determine if, and why juvenile orchards (four to eight years old) experience higher FCM infestation than mature orchards (nine years and older). In laboratory trials, Washington Navel oranges and Nova Mandarins from juvenile trees were shown to be significantly more susceptible to FCM damage and significantly more attractive for oviposition in both choice and no-choice trials, than fruit from mature trees. Although fruit from juvenile Cambria Navel trees were significantly more attractive than mature orchards for oviposition, they were not more susceptible to FCM damage. In contrast, fruit from juvenile and mature Midnight Valencia orchards were equally attractive for oviposition, but fruit from juvenile trees were significantly more susceptible to FCM damage than fruit from mature trees. Artificial diets were augmented with powder from fruit from juvenile or mature Washington Navel orchards at 5%, 10%, 15% or 30%. Higher larval survival of 76%, 63%, 50% and 34%, respectively, was recorded on diets containing fruit powder from the juvenile trees than on diets containing fruit powder from the mature trees, at 69%, 57%, 44% and 27% larval survival, respectively. Bioassays were conducted to determine if differences in plant chemistry between fruit from juvenile and mature trees will have an impact on the susceptibility FCM to entomopathogenic nematodes (EPN), entomopathogenic fungi (EPF) and Cryptophlebia leucotreta granulovirus (CrleGV). No significant differences in the susceptibility of larvae reared on diets containing 15% fruit powder from juvenile and mature trees to EPN and EPF were recorded. Mortality of neonate larvae was significantly lower when placed on diets containing 15% fruit powder from mature trees (45% mortality) than diets containing 15% fruit powder from juvenile trees (61% mortality), after larvae ingested the lowest virus concentration tested, being 2 x104 OBs/ml. Data collected from field surveys showed significantly lower egg parasitism, virus infection of larvae and EPF occurrence in juvenile orchards than mature orchards. Egg parasitism was between 11% and 54% higher in mature orchards than juvenile orchards, with the exception of Mandarins during 2015, where egg parasitism was slightly higher in juvenile orchards, but not significantly so. A significantly higher proportion of larvae retrieved from mature orchards (7% of larvae) were infected with CrleGV than larvae retrieved from juvenile orchards (4% of larvae). A significantly higher occurrence of EPF was recorded in non-bearing and mature orchards, with 40% and 37% occurrence respectively, than in juvenile orchards, with 25% occurrence recorded. EPF occurrence in juvenile orchards increased significantly by 16% to 32% from the first to the third year of sampling. In contrast to results recorded in laboratory trials, similar or higher pest pressure in juvenile orchards than mature orchards did not always result in significantly higher levels of FCM damage under field conditions. FCM damage in juvenile orchards may have been lower than expected, as greater extremes of temperature and lower humidity were recorded in juvenile orchards, which would increase larval mortality. Results of this study showed that juvenile and mature orchards are significantly different and should be managed differently.
- Full Text:
- Date Issued: 2018
- Authors: Albertyn, Sonnica
- Date: 2018
- Subjects: Cryptophlebia leucotreta , Population biology , Insect populations , Orchards , Insect nematodes , Entomopathogenic fungi
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62615 , vital:28213
- Description: Anecdotal reports in the South African citrus industry claim higher populations of false codling moth (FCM), Thaumatotibia (Cryptophlebia) leucotreta (Meyr) (Lepidoptera: Tortricidae), in orchards during the first three to five harvesting years of citrus planted in virgin soil, after which, FCM numbers seem to decrease and remain consistent. Various laboratory studies and field surveys were conducted to determine if, and why juvenile orchards (four to eight years old) experience higher FCM infestation than mature orchards (nine years and older). In laboratory trials, Washington Navel oranges and Nova Mandarins from juvenile trees were shown to be significantly more susceptible to FCM damage and significantly more attractive for oviposition in both choice and no-choice trials, than fruit from mature trees. Although fruit from juvenile Cambria Navel trees were significantly more attractive than mature orchards for oviposition, they were not more susceptible to FCM damage. In contrast, fruit from juvenile and mature Midnight Valencia orchards were equally attractive for oviposition, but fruit from juvenile trees were significantly more susceptible to FCM damage than fruit from mature trees. Artificial diets were augmented with powder from fruit from juvenile or mature Washington Navel orchards at 5%, 10%, 15% or 30%. Higher larval survival of 76%, 63%, 50% and 34%, respectively, was recorded on diets containing fruit powder from the juvenile trees than on diets containing fruit powder from the mature trees, at 69%, 57%, 44% and 27% larval survival, respectively. Bioassays were conducted to determine if differences in plant chemistry between fruit from juvenile and mature trees will have an impact on the susceptibility FCM to entomopathogenic nematodes (EPN), entomopathogenic fungi (EPF) and Cryptophlebia leucotreta granulovirus (CrleGV). No significant differences in the susceptibility of larvae reared on diets containing 15% fruit powder from juvenile and mature trees to EPN and EPF were recorded. Mortality of neonate larvae was significantly lower when placed on diets containing 15% fruit powder from mature trees (45% mortality) than diets containing 15% fruit powder from juvenile trees (61% mortality), after larvae ingested the lowest virus concentration tested, being 2 x104 OBs/ml. Data collected from field surveys showed significantly lower egg parasitism, virus infection of larvae and EPF occurrence in juvenile orchards than mature orchards. Egg parasitism was between 11% and 54% higher in mature orchards than juvenile orchards, with the exception of Mandarins during 2015, where egg parasitism was slightly higher in juvenile orchards, but not significantly so. A significantly higher proportion of larvae retrieved from mature orchards (7% of larvae) were infected with CrleGV than larvae retrieved from juvenile orchards (4% of larvae). A significantly higher occurrence of EPF was recorded in non-bearing and mature orchards, with 40% and 37% occurrence respectively, than in juvenile orchards, with 25% occurrence recorded. EPF occurrence in juvenile orchards increased significantly by 16% to 32% from the first to the third year of sampling. In contrast to results recorded in laboratory trials, similar or higher pest pressure in juvenile orchards than mature orchards did not always result in significantly higher levels of FCM damage under field conditions. FCM damage in juvenile orchards may have been lower than expected, as greater extremes of temperature and lower humidity were recorded in juvenile orchards, which would increase larval mortality. Results of this study showed that juvenile and mature orchards are significantly different and should be managed differently.
- Full Text:
- Date Issued: 2018
The construction of household livelihood strategies in urban areas: the case of Budiriro, Harare, Zimbabwe
- Authors: Chevo, Tafadzwa
- Date: 2018
- Subjects: Income -- Zimbabwe -- Harare , Cost and standard of living -- Zimbabwe -- Harare , Quality of life -- Zimbabwe -- Harare , Informal sector (Economics) -- Zimbabwe -- Harare , Agricultural wages -- Zimbabwe -- Harare , Households -- Economic aspects -- Zimbabwe -- Harare , Macrosociology , Zimbabwe -- Social conditions -- 1980- , Zimbabwe -- Economic conditions -- 1980- , Livelihoods Framework
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63043 , vital:28357
- Description: The main objective of this thesis is to understand and explain the ongoing construction of livelihood activities by urban households in the low-income high-density area of Budiriro, Harare, Zimbabwe in a context characterised by systemic crisis and a general decline of the national economy. The study utilised a mixed methods research approach, which combined both qualitative and quantitative research, including a survey, life histories and focus group discussions. The thesis discusses a diverse range of livelihood activities of Budiriro households, such as formal employment, informal trading and agricultural activities, and the ways in which households seeks to diversify their livelihood portfolio. It does this by way of also examining the contemporary and historical factors influencing the livelihood activities pursued by these households, along with the shocks and disturbances encountered and experienced by households in trying to construct viable livelihoods. The thesis makes useful contributions to the existing literature on livelihoods studies. Firstly, the thesis disaggregates the households by showing the existence of three wealth categories in Budiriro and the varying livelihood strategies of households in different wealth categories. Secondly, the study highlights the significance of intra-household dynamics in Budiriro for livelihoods as well as of inter-household kinship networks, which transcend the urban space and entail multi-spatial livelihoods. Thirdly, the thesis examines livelihoods over time, such that it goes beyond a strictly synchronic examination, therefore providing a diachronic analysis of diverse and complicated livelihood pathways. Finally, the Livelihoods Framework is located within broader macro-sociological theorising including the work of Pierre Bourdieu. In this respect, important insights arise about livelihood choices and practices in the light of ongoing debates within sociology about human agency.
- Full Text:
- Date Issued: 2018
- Authors: Chevo, Tafadzwa
- Date: 2018
- Subjects: Income -- Zimbabwe -- Harare , Cost and standard of living -- Zimbabwe -- Harare , Quality of life -- Zimbabwe -- Harare , Informal sector (Economics) -- Zimbabwe -- Harare , Agricultural wages -- Zimbabwe -- Harare , Households -- Economic aspects -- Zimbabwe -- Harare , Macrosociology , Zimbabwe -- Social conditions -- 1980- , Zimbabwe -- Economic conditions -- 1980- , Livelihoods Framework
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63043 , vital:28357
- Description: The main objective of this thesis is to understand and explain the ongoing construction of livelihood activities by urban households in the low-income high-density area of Budiriro, Harare, Zimbabwe in a context characterised by systemic crisis and a general decline of the national economy. The study utilised a mixed methods research approach, which combined both qualitative and quantitative research, including a survey, life histories and focus group discussions. The thesis discusses a diverse range of livelihood activities of Budiriro households, such as formal employment, informal trading and agricultural activities, and the ways in which households seeks to diversify their livelihood portfolio. It does this by way of also examining the contemporary and historical factors influencing the livelihood activities pursued by these households, along with the shocks and disturbances encountered and experienced by households in trying to construct viable livelihoods. The thesis makes useful contributions to the existing literature on livelihoods studies. Firstly, the thesis disaggregates the households by showing the existence of three wealth categories in Budiriro and the varying livelihood strategies of households in different wealth categories. Secondly, the study highlights the significance of intra-household dynamics in Budiriro for livelihoods as well as of inter-household kinship networks, which transcend the urban space and entail multi-spatial livelihoods. Thirdly, the thesis examines livelihoods over time, such that it goes beyond a strictly synchronic examination, therefore providing a diachronic analysis of diverse and complicated livelihood pathways. Finally, the Livelihoods Framework is located within broader macro-sociological theorising including the work of Pierre Bourdieu. In this respect, important insights arise about livelihood choices and practices in the light of ongoing debates within sociology about human agency.
- Full Text:
- Date Issued: 2018
The current utility of oligonucleotide aptamers in targeting the MUC1 mucin tumour marker
- Authors: Flanagan, Shane Patrick
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62969 , vital:28348
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
- Authors: Flanagan, Shane Patrick
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62969 , vital:28348
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
The ecological risk of acid mine drainage in a salinising landscape
- Authors: Vellemu, Emmanuel Captain
- Date: 2018
- Subjects: Acid mine drainage Environmental aspects South Africa Mpumalanga , Salinization South Africa Mpumalanga , Water salinization South Africa Mpumalanga , Water quality South Africa Mpumalanga , Aquatic animals Effect of water quality on South Africa Mpumalanga , Freshwater ecology South Africa Mpumalanga
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60563 , vital:27797
- Description: Acid mine drainage (AMD) and increasing salinity of freshwater ecosystems pose serious threats to water quality in water-stressed South Africa. These threats are exacerbated by mining activities, mainly gold and coal from both active and abandoned mines that continue to release acidic water that is rich in toxic metals and high sulphate concentrations. Therefore, the overarching hypothesis for this study was that “the combination of AMD and sulphate salts confers high ecological risk to the aquatic biota”. The study employed both laboratory and field investigations to test this hypothesis and provide appropriate tools to protect freshwater ecosystems from increasing anthropogenic impacts. Firstly, a laboratory investigation was carried out to develop risk-based water quality guidelines (WQGs) for sulphates and treated AMD (TAMD) using the species sensitivity distributions (SSDs) technique. Five South African freshwater species belonging to five different taxonomic groupings, including Adenophlebia auriculata (insect), Burnupia stenochorias (mollusc), Caridina nilotica (crustacea), Pseudokirchneriella subcapitata (algae) and Oreochromis mossambicus (fish) were exposed to varying concentrations of sodium sulphate (Na2SO4), magnesium sulphate (MgSO4) and calcium sulphate (CaSO4), as well as TAMD in separate ecotoxicological experiments, applying short-term (96 h) non-renewal and long-term (240 h) renewal exposure test methods. Secondly, a novel trait-based approach (TBA) was also used to predict the vulnerability of taxa to treated acid mine drainage (TAMD). The TBA used a combination of carefully selected traits of organisms that are mechanistically linked to TAMD for their potential vulnerability predictions. Leptoceridae (caddisflies) and Leptophlebiidae (mayflies) were selected taxa for evaluation of the trait-based vulnerability predictions to TAMD for laboratory toxicity exposures. This was followed by a field investigation to assess macroinvertebrates assemblage responses, abundance and richness to a TAMD-impacted stream using the South African Scoring System version 5 (SASS5) protocol. Outcomes form the above three sources were combined in a multi-criteria analysis (MCA) to develop an appropriate water quality management strategy in a form of a trait-based decision-making support tool. Results of the risk-based WQGs revealed that Na2SO4 was the most toxic of the tested salts. A concentration of 0.020 g/L Na2SO4, 0.055 g/L CaSO4, and 0.108 g/L MgSO4 or a combined sulphate salts limit of 0.067 g/L were derived as long-term WQGs to protect over 95% of the population species in a natural environment considered as relatively pristine. This means that the generic 0.25 g/L sulphate compliance limit for South African freshwater systems is under-protective. Burnupia stenochorias was the most sensitive to AMD after long-term exposures, and it was adjudged as a good indicator of AMD along with P. subcapitata. Long-term scenario-specific WQG for AMD for the protection of over 95% of the population species was derived as 0.014%. Results of the TBA revealed that the relative abundance and diversity of taxa at a site that received direct impact from TAMD generally corresponded to trait-based predictions. The site that received direct TAMD was largely dominated by members of the Corixidae and Naucoridae families. However, Leptoceridae was more vulnerable to TAMD than Leptophlebidae contrary to predictions. Its assemblage did not match the predictions although Leptophlebiidae corresponded to predictions in terms of its assemblage and diversity. As water quality improved further downstream of the TAMD source, macroinvertebrates assemblage and diversity also improved as predicted. However, it is important to note that other equally important traits that were not studied might influence the response of organisms during toxicity test exposures. The MCA findings suggest that the trait-based decision-making support tool is a useful management strategy for the predicting vulnerability of taxa aquatic stressors including AMD and increasing salinity. Overall, the outcome of this study suggests that AMD poses an ecological risk to aquatic biota, but this becomes riskier in the presence of excess sulphate salts. Albeit, the WQGs for sulphate salts and AMD as well as the developed trait-based decision support tool all contribute novel sound scientific knowledge basis for managing the AMD and increasing salinity in freshwater ecosystems. The study recommends incorporating different life stages of indigenous species tested to determine if their sensitivity to AMD and sulphate would correspond to current findings because early life stages could be more sensitive to aquatic stressors than juveniles or adults. This is important for the derivation of strong and relevant WQGs. The TBA requires further refinement for its incorporation in ecotoxicology on a wide scale.
- Full Text:
- Date Issued: 2018
- Authors: Vellemu, Emmanuel Captain
- Date: 2018
- Subjects: Acid mine drainage Environmental aspects South Africa Mpumalanga , Salinization South Africa Mpumalanga , Water salinization South Africa Mpumalanga , Water quality South Africa Mpumalanga , Aquatic animals Effect of water quality on South Africa Mpumalanga , Freshwater ecology South Africa Mpumalanga
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60563 , vital:27797
- Description: Acid mine drainage (AMD) and increasing salinity of freshwater ecosystems pose serious threats to water quality in water-stressed South Africa. These threats are exacerbated by mining activities, mainly gold and coal from both active and abandoned mines that continue to release acidic water that is rich in toxic metals and high sulphate concentrations. Therefore, the overarching hypothesis for this study was that “the combination of AMD and sulphate salts confers high ecological risk to the aquatic biota”. The study employed both laboratory and field investigations to test this hypothesis and provide appropriate tools to protect freshwater ecosystems from increasing anthropogenic impacts. Firstly, a laboratory investigation was carried out to develop risk-based water quality guidelines (WQGs) for sulphates and treated AMD (TAMD) using the species sensitivity distributions (SSDs) technique. Five South African freshwater species belonging to five different taxonomic groupings, including Adenophlebia auriculata (insect), Burnupia stenochorias (mollusc), Caridina nilotica (crustacea), Pseudokirchneriella subcapitata (algae) and Oreochromis mossambicus (fish) were exposed to varying concentrations of sodium sulphate (Na2SO4), magnesium sulphate (MgSO4) and calcium sulphate (CaSO4), as well as TAMD in separate ecotoxicological experiments, applying short-term (96 h) non-renewal and long-term (240 h) renewal exposure test methods. Secondly, a novel trait-based approach (TBA) was also used to predict the vulnerability of taxa to treated acid mine drainage (TAMD). The TBA used a combination of carefully selected traits of organisms that are mechanistically linked to TAMD for their potential vulnerability predictions. Leptoceridae (caddisflies) and Leptophlebiidae (mayflies) were selected taxa for evaluation of the trait-based vulnerability predictions to TAMD for laboratory toxicity exposures. This was followed by a field investigation to assess macroinvertebrates assemblage responses, abundance and richness to a TAMD-impacted stream using the South African Scoring System version 5 (SASS5) protocol. Outcomes form the above three sources were combined in a multi-criteria analysis (MCA) to develop an appropriate water quality management strategy in a form of a trait-based decision-making support tool. Results of the risk-based WQGs revealed that Na2SO4 was the most toxic of the tested salts. A concentration of 0.020 g/L Na2SO4, 0.055 g/L CaSO4, and 0.108 g/L MgSO4 or a combined sulphate salts limit of 0.067 g/L were derived as long-term WQGs to protect over 95% of the population species in a natural environment considered as relatively pristine. This means that the generic 0.25 g/L sulphate compliance limit for South African freshwater systems is under-protective. Burnupia stenochorias was the most sensitive to AMD after long-term exposures, and it was adjudged as a good indicator of AMD along with P. subcapitata. Long-term scenario-specific WQG for AMD for the protection of over 95% of the population species was derived as 0.014%. Results of the TBA revealed that the relative abundance and diversity of taxa at a site that received direct impact from TAMD generally corresponded to trait-based predictions. The site that received direct TAMD was largely dominated by members of the Corixidae and Naucoridae families. However, Leptoceridae was more vulnerable to TAMD than Leptophlebidae contrary to predictions. Its assemblage did not match the predictions although Leptophlebiidae corresponded to predictions in terms of its assemblage and diversity. As water quality improved further downstream of the TAMD source, macroinvertebrates assemblage and diversity also improved as predicted. However, it is important to note that other equally important traits that were not studied might influence the response of organisms during toxicity test exposures. The MCA findings suggest that the trait-based decision-making support tool is a useful management strategy for the predicting vulnerability of taxa aquatic stressors including AMD and increasing salinity. Overall, the outcome of this study suggests that AMD poses an ecological risk to aquatic biota, but this becomes riskier in the presence of excess sulphate salts. Albeit, the WQGs for sulphate salts and AMD as well as the developed trait-based decision support tool all contribute novel sound scientific knowledge basis for managing the AMD and increasing salinity in freshwater ecosystems. The study recommends incorporating different life stages of indigenous species tested to determine if their sensitivity to AMD and sulphate would correspond to current findings because early life stages could be more sensitive to aquatic stressors than juveniles or adults. This is important for the derivation of strong and relevant WQGs. The TBA requires further refinement for its incorporation in ecotoxicology on a wide scale.
- Full Text:
- Date Issued: 2018
The effect of guided enquiry-based learning approach on electrical engineering students' recall ability, conceptual understanding, problem solving skills and critical thinking ability in power electronics course at a selected university in South Africa
- Authors: Kumar, Vinod
- Date: 2018
- Subjects: Power electronics Power electronics -- Problems, exercises -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8474 , vital:32836
- Description: Power Electronics (PE) forms the major part of the syllabus for the Industrial Electronics (INDE) course of the National Diploma (ND) programme in Electrical Engineering. This study investigated the effect of Guided Enquiry-Based Learning (GEBL), an Active Learning (AL) approach on Electrical Engineering students’ recall ability, conceptual understanding of PE, problem solving skills and critical thinking ability. The study was carried out at one of the campuses of a selected university in South Africa’s Eastern Cape Province in an attempt to check if GEBL would improve student performances in the above focused areas. The expected population for this research in 2017 was 21, similar to the numbers enrolled in 2016. However, in 2017 the enrollment dropped to 14 and this posed a limitation. Since cancelling the study due to the drop in enrollment would have caused the loss of a research report on PE students, it was decided to continue with it. This was especially so, since no other report on PE within South Africa could be located. The instruments were developed using inputs from subject experts to ensure content validity. Cronbach’s Alpha was used to test the reliability of the instrument. A pilot study was conducted during the previous year with the 2016 PE students and deficiencies in the instruments were rectified. Out of the 14 students in 2017, seven volunteered to be taught using the GEBL approach. All ethical considerations applicable to the study were adhered to. All students from the GEBL group signed the informed consent forms prior to the study. The study adopted a pragmatist paradigm and a mixed method approach. A quasi experimental non-equivalent group post-test only research design was used where both the experimental group and the control group were selected (without random assignment). The post-test only design was selected because of the time constraints with the semester courses. A student-centred GEBL approach was used as an intervention for the experimental group and a teacher-centred traditional approach was used for the control group. Students from both the GEBL and Traditionally Taught Groups (TTGs) were subjected to the same assessments. Quantitative data were collected from two formative assessments and one summative assessment and the qualitative data were collected by interviewing all students from the GEBL group. The collected data were statistically and thematically analysed to determine the extent to which the intervention affected the students’ recall ability, conceptual understanding of PE, problem solving skills and their critical thinking ability. The main conclusions were that when compared to the traditional approach, GEBL was significantly more effective in enhancing recall as well as understanding of PE concepts. However, significant differences were not evident in problem solving and critical thinking. The recommendations are that: students must be encouraged to be more active in the learning process; the shift of strategy from traditional to AL methods such as GEBL must be introduced gradually; and the benefits of GEBL and exposure to it must be popularised in order to develop positive attitudes to GEBL not only among students, but also teaching staff.
- Full Text:
- Date Issued: 2018
- Authors: Kumar, Vinod
- Date: 2018
- Subjects: Power electronics Power electronics -- Problems, exercises -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8474 , vital:32836
- Description: Power Electronics (PE) forms the major part of the syllabus for the Industrial Electronics (INDE) course of the National Diploma (ND) programme in Electrical Engineering. This study investigated the effect of Guided Enquiry-Based Learning (GEBL), an Active Learning (AL) approach on Electrical Engineering students’ recall ability, conceptual understanding of PE, problem solving skills and critical thinking ability. The study was carried out at one of the campuses of a selected university in South Africa’s Eastern Cape Province in an attempt to check if GEBL would improve student performances in the above focused areas. The expected population for this research in 2017 was 21, similar to the numbers enrolled in 2016. However, in 2017 the enrollment dropped to 14 and this posed a limitation. Since cancelling the study due to the drop in enrollment would have caused the loss of a research report on PE students, it was decided to continue with it. This was especially so, since no other report on PE within South Africa could be located. The instruments were developed using inputs from subject experts to ensure content validity. Cronbach’s Alpha was used to test the reliability of the instrument. A pilot study was conducted during the previous year with the 2016 PE students and deficiencies in the instruments were rectified. Out of the 14 students in 2017, seven volunteered to be taught using the GEBL approach. All ethical considerations applicable to the study were adhered to. All students from the GEBL group signed the informed consent forms prior to the study. The study adopted a pragmatist paradigm and a mixed method approach. A quasi experimental non-equivalent group post-test only research design was used where both the experimental group and the control group were selected (without random assignment). The post-test only design was selected because of the time constraints with the semester courses. A student-centred GEBL approach was used as an intervention for the experimental group and a teacher-centred traditional approach was used for the control group. Students from both the GEBL and Traditionally Taught Groups (TTGs) were subjected to the same assessments. Quantitative data were collected from two formative assessments and one summative assessment and the qualitative data were collected by interviewing all students from the GEBL group. The collected data were statistically and thematically analysed to determine the extent to which the intervention affected the students’ recall ability, conceptual understanding of PE, problem solving skills and their critical thinking ability. The main conclusions were that when compared to the traditional approach, GEBL was significantly more effective in enhancing recall as well as understanding of PE concepts. However, significant differences were not evident in problem solving and critical thinking. The recommendations are that: students must be encouraged to be more active in the learning process; the shift of strategy from traditional to AL methods such as GEBL must be introduced gradually; and the benefits of GEBL and exposure to it must be popularised in order to develop positive attitudes to GEBL not only among students, but also teaching staff.
- Full Text:
- Date Issued: 2018
The efficacy of multi-track diplomacy in resolving intrastate and internationalised conflicts in Africa: the case of the 2007/2008 post-election violence in Kenya
- Authors: Natolooka, Kepha
- Date: 2018
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63546 , vital:28434
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
- Authors: Natolooka, Kepha
- Date: 2018
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63546 , vital:28434
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
The environmental imagination in Arthur Nortje’s poetry
- Authors: Kaze, Douglas Eric
- Date: 2018
- Subjects: Nortje, Arthur, 1942-1970 -- Criticism and interpretation , Ecology in literature , Race awareness in literature , South African poetry (English) -- History and criticism , Nature in literature , Transversal postcolonial environmental criticism
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/58024 , vital:27033
- Description: This thesis seeks to contribute to the conversations in the humanities about the treatment of the physical environment in the context of a global ecological fragility and increased scholarly interest in the poetry of Arthur Nortje, a South African poet who wrote in the 1960s. While previous studies on Nortje concentrate on the political, psychic and technical aspects of his poetry, this study particularly explores the representations of the environment in Nortje’s poetic imagination. Writing in the dark period of apartheid in South Africa’s history, Nortje’s poetry articulates a strong interest in the physical environment against the backdrop of official racialization of space and his personal nomadic life and exile. The poetry abounds with constant intersections of nature and culture (industrialism, urbanity and the quotidian), a sense of place and a deep sense of dislocation. The poems, therefore, present a platform from which to reevaluate conventional ecocritical ideas about nature, place-attachment and environmental consciousness. Drawing mainly on Felix Guattari’s ideas of three ecologies and transversality along with other theories, I conduct the study through what I call a transversal postcolonial environmental criticism, which considers the ecological value of the kind of assemblages that Nortje’s works represent. The first chapter focuses on conceptualizing a postcolonial approach to the environment based on Guattari’s concept of transversality to lay the theoretical foundation for the whole work. The second chapter analyses Nortje’s poetic imagination of place and displacement through his treatment of the private-public tension and the motif of exile. While the third chapter examines Nortje’s depiction of nature as both an everyday and urban phenomenon, the fourth chapter turns to his direct treatment of environmental crises handled through his imagination of the Canadian urban spaces, exile memory of apartheid geography, war and ecocide and the human body as a subject of environmental degradation. The fifth chapter, which is the conclusion, takes a brief look at the implication of Nortje’s complex treatment of the environment on postcolonial environmentalism.
- Full Text:
- Date Issued: 2018
- Authors: Kaze, Douglas Eric
- Date: 2018
- Subjects: Nortje, Arthur, 1942-1970 -- Criticism and interpretation , Ecology in literature , Race awareness in literature , South African poetry (English) -- History and criticism , Nature in literature , Transversal postcolonial environmental criticism
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/58024 , vital:27033
- Description: This thesis seeks to contribute to the conversations in the humanities about the treatment of the physical environment in the context of a global ecological fragility and increased scholarly interest in the poetry of Arthur Nortje, a South African poet who wrote in the 1960s. While previous studies on Nortje concentrate on the political, psychic and technical aspects of his poetry, this study particularly explores the representations of the environment in Nortje’s poetic imagination. Writing in the dark period of apartheid in South Africa’s history, Nortje’s poetry articulates a strong interest in the physical environment against the backdrop of official racialization of space and his personal nomadic life and exile. The poetry abounds with constant intersections of nature and culture (industrialism, urbanity and the quotidian), a sense of place and a deep sense of dislocation. The poems, therefore, present a platform from which to reevaluate conventional ecocritical ideas about nature, place-attachment and environmental consciousness. Drawing mainly on Felix Guattari’s ideas of three ecologies and transversality along with other theories, I conduct the study through what I call a transversal postcolonial environmental criticism, which considers the ecological value of the kind of assemblages that Nortje’s works represent. The first chapter focuses on conceptualizing a postcolonial approach to the environment based on Guattari’s concept of transversality to lay the theoretical foundation for the whole work. The second chapter analyses Nortje’s poetic imagination of place and displacement through his treatment of the private-public tension and the motif of exile. While the third chapter examines Nortje’s depiction of nature as both an everyday and urban phenomenon, the fourth chapter turns to his direct treatment of environmental crises handled through his imagination of the Canadian urban spaces, exile memory of apartheid geography, war and ecocide and the human body as a subject of environmental degradation. The fifth chapter, which is the conclusion, takes a brief look at the implication of Nortje’s complex treatment of the environment on postcolonial environmentalism.
- Full Text:
- Date Issued: 2018
The FAST fabric objective measurement properties of commercial worsted apparel fabrics available in South Africa
- Authors: Das, Sweta
- Date: 2018
- Subjects: Textile fabrics -- Testing , Textile fabrics -- Measurement , Textile fibers -- Testing , Textile design
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/17814 , vital:28458
- Description: In the last few decades, there has been a shift globally towards the objective measurement of these textile fibre, yarn and fabric properties which determine processing performance and product quality. This shift is also very apparent in the objective measurement of fabric properties, particularly those relating to handle and making-up into a garment. This study was motivated by the fact that the adoption of fabric objective measurement (FOM), specifically the FAST system, will benefit the South African worsted apparel sector, as it has done in various other countries which produce high quality worsted apparel fabrics and garments. FAST is robust and portable, yet inexpensive. The main objective of the study was to develop a FAST referencing system which can be used for benchmarking by the local apparel industry and, as a basis for encouraging and persuading the industry to adopt this system of fabric quality measurement and assurance and thereby improve their product quality and international competitiveness. To achieve the main objective, involved sourcing and FAST testing a representative cross-section of commercial worsted apparel fabrics with the emphasis on wool and wool blends from the local fabric and clothing manufacturing industry, and determining how the various FAST properties were affected by factors such as fabric weave, fibre blend and weight, since this could impact on the specific nature and validity of the referencing system. A total of some 394 worsted type commercial fabrics, mainly in wool and wool blends, were sourced from, and with the inputs of, local apparel fabric and clothing manufacturers so as to ensure the local fabric and garment representative of the sample population and after which the fabrics were tested on the FAST system. ANOVA (regression analysis) was carried out on each of the FAST parameters in order to determine whether fabric weight, weave, thickness and fibre composition (pure wool and wool blends) had a statistically significant effect on them, since this is an important aspect which needs to be clarified prior to the development of a envisaged meaningful FAST system.
- Full Text:
- Date Issued: 2018
- Authors: Das, Sweta
- Date: 2018
- Subjects: Textile fabrics -- Testing , Textile fabrics -- Measurement , Textile fibers -- Testing , Textile design
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/17814 , vital:28458
- Description: In the last few decades, there has been a shift globally towards the objective measurement of these textile fibre, yarn and fabric properties which determine processing performance and product quality. This shift is also very apparent in the objective measurement of fabric properties, particularly those relating to handle and making-up into a garment. This study was motivated by the fact that the adoption of fabric objective measurement (FOM), specifically the FAST system, will benefit the South African worsted apparel sector, as it has done in various other countries which produce high quality worsted apparel fabrics and garments. FAST is robust and portable, yet inexpensive. The main objective of the study was to develop a FAST referencing system which can be used for benchmarking by the local apparel industry and, as a basis for encouraging and persuading the industry to adopt this system of fabric quality measurement and assurance and thereby improve their product quality and international competitiveness. To achieve the main objective, involved sourcing and FAST testing a representative cross-section of commercial worsted apparel fabrics with the emphasis on wool and wool blends from the local fabric and clothing manufacturing industry, and determining how the various FAST properties were affected by factors such as fabric weave, fibre blend and weight, since this could impact on the specific nature and validity of the referencing system. A total of some 394 worsted type commercial fabrics, mainly in wool and wool blends, were sourced from, and with the inputs of, local apparel fabric and clothing manufacturers so as to ensure the local fabric and garment representative of the sample population and after which the fabrics were tested on the FAST system. ANOVA (regression analysis) was carried out on each of the FAST parameters in order to determine whether fabric weight, weave, thickness and fibre composition (pure wool and wool blends) had a statistically significant effect on them, since this is an important aspect which needs to be clarified prior to the development of a envisaged meaningful FAST system.
- Full Text:
- Date Issued: 2018