Technology in conservation: towards a system for in-field drone detection of invasive vegetation
- James, Katherine Margaret Frances
- Authors: James, Katherine Margaret Frances
- Date: 2020
- Subjects: Drone aircraft in remote sensing , Neural networks (Computer science) , Drone aircraft in remote sensing -- Case studies , Machine learning , Computer vision , Environmental monitoring -- Remote sensing , Invasive plants -- Monitoring
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/143408 , vital:38244
- Description: Remote sensing can assist in monitoring the spread of invasive vegetation. The adoption of camera-carrying unmanned aerial vehicles, commonly referred to as drones, as remote sensing tools has yielded images of higher spatial resolution than traditional techniques. Drones also have the potential to interact with the environment through the delivery of bio-control or herbicide, as seen with their adoption in precision agriculture. Unlike in agricultural applications, however, invasive plants do not have a predictable position relative to each other within the environment. To facilitate the adoption of drones as an environmental monitoring and management tool, drones need to be able to intelligently distinguish between invasive and non-invasive vegetation on the fly. In this thesis, we present the augmentation of a commercially available drone with a deep machine learning model to investigate the viability of differentiating between an invasive shrub and other vegetation. As a case study, this was applied to the shrub genus Hakea, originating in Australia and invasive in several countries including South Africa. However, for this research, the methodology is important, rather than the chosen target plant. A dataset was collected using the available drone and manually annotated to facilitate the supervised training of the model. Two approaches were explored, namely, classification and semantic segmentation. For each of these, several models were trained and evaluated to find the optimal one. The chosen model was then interfaced with the drone via an Android application on a mobile device and its performance was preliminarily evaluated in the field. Based on these findings, refinements were made and thereafter a thorough field evaluation was performed to determine the best conditions for model operation. Results from the classification task show that deep learning models are capable of distinguishing between target and other shrubs in ideal candidate windows. However, classification in this manner is restricted by the proposal of such candidate windows. End-to-end image segmentation using deep learning overcomes this problem, classifying the image in a pixel-wise manner. Furthermore, the use of appropriate loss functions was found to improve model performance. Field tests show that illumination and shadow pose challenges to the model, but that good recall can be achieved when the conditions are ideal. False positive detection remains an issue that could be improved. This approach shows the potential for drones as an environmental monitoring and management tool when coupled with deep machine learning techniques and outlines potential problems that may be encountered.
- Full Text:
- Authors: James, Katherine Margaret Frances
- Date: 2020
- Subjects: Drone aircraft in remote sensing , Neural networks (Computer science) , Drone aircraft in remote sensing -- Case studies , Machine learning , Computer vision , Environmental monitoring -- Remote sensing , Invasive plants -- Monitoring
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/143408 , vital:38244
- Description: Remote sensing can assist in monitoring the spread of invasive vegetation. The adoption of camera-carrying unmanned aerial vehicles, commonly referred to as drones, as remote sensing tools has yielded images of higher spatial resolution than traditional techniques. Drones also have the potential to interact with the environment through the delivery of bio-control or herbicide, as seen with their adoption in precision agriculture. Unlike in agricultural applications, however, invasive plants do not have a predictable position relative to each other within the environment. To facilitate the adoption of drones as an environmental monitoring and management tool, drones need to be able to intelligently distinguish between invasive and non-invasive vegetation on the fly. In this thesis, we present the augmentation of a commercially available drone with a deep machine learning model to investigate the viability of differentiating between an invasive shrub and other vegetation. As a case study, this was applied to the shrub genus Hakea, originating in Australia and invasive in several countries including South Africa. However, for this research, the methodology is important, rather than the chosen target plant. A dataset was collected using the available drone and manually annotated to facilitate the supervised training of the model. Two approaches were explored, namely, classification and semantic segmentation. For each of these, several models were trained and evaluated to find the optimal one. The chosen model was then interfaced with the drone via an Android application on a mobile device and its performance was preliminarily evaluated in the field. Based on these findings, refinements were made and thereafter a thorough field evaluation was performed to determine the best conditions for model operation. Results from the classification task show that deep learning models are capable of distinguishing between target and other shrubs in ideal candidate windows. However, classification in this manner is restricted by the proposal of such candidate windows. End-to-end image segmentation using deep learning overcomes this problem, classifying the image in a pixel-wise manner. Furthermore, the use of appropriate loss functions was found to improve model performance. Field tests show that illumination and shadow pose challenges to the model, but that good recall can be achieved when the conditions are ideal. False positive detection remains an issue that could be improved. This approach shows the potential for drones as an environmental monitoring and management tool when coupled with deep machine learning techniques and outlines potential problems that may be encountered.
- Full Text:
Temperature tolerance and humidity requirements of select entomopathogenic fungal isolates for future use in citrus IPM programmes
- Acheampong, M A, Coombes, Candice A, Moore, Sean D, Hill, Martin P
- Authors: Acheampong, M A , Coombes, Candice A , Moore, Sean D , Hill, Martin P
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/419399 , vital:71641 , xlink:href="https://doi.org/10.1016/j.jip.2020.107436"
- Description: Several isolates of Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitacae) and Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitacae) have been investigated as possible microbial control agents of key citrus pests in South Africa. Although laboratory results have been promising, field trials against foliar pests have shown limited success. These findings highlighted the need to investigate other biological attributes of these fungal isolates besides virulence in order to select candidates that may be better suited for the foliar environment. Thus, this study investigated the influence of temperature on the in vitro growth of seven indigenous local isolates and the humidity requirements necessary to promote successful infection, in comparison with two commercial isolates (B. bassiana PPRI 5339 and M. anisopliae ICIPE 69). All the fungal isolates grew across a range of temperatures (8–34 °C) and optimally between 26 and 28 °C. Similarly, fungal infection of Thaumatotibia leucotreta Meyrick (Lepidoptera: Tortricidae) fifth instars occurred across a range of humidity levels (12%, 43%, 75%, 98%) regardless of fungal concentration, although external sporulation was restricted to treatments exposed to 98% relative humidity. It was concluded that neither temperature nor humidity, when considered alone, is likely to significantly influence the efficacy of any of the isolates in the field, given that they are active within temperature and humidity ranges experienced in South African citrus orchards.
- Full Text:
- Authors: Acheampong, M A , Coombes, Candice A , Moore, Sean D , Hill, Martin P
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/419399 , vital:71641 , xlink:href="https://doi.org/10.1016/j.jip.2020.107436"
- Description: Several isolates of Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Cordycipitacae) and Metarhizium anisopliae (Metchnikoff) Sorokin (Hypocreales: Clavicipitacae) have been investigated as possible microbial control agents of key citrus pests in South Africa. Although laboratory results have been promising, field trials against foliar pests have shown limited success. These findings highlighted the need to investigate other biological attributes of these fungal isolates besides virulence in order to select candidates that may be better suited for the foliar environment. Thus, this study investigated the influence of temperature on the in vitro growth of seven indigenous local isolates and the humidity requirements necessary to promote successful infection, in comparison with two commercial isolates (B. bassiana PPRI 5339 and M. anisopliae ICIPE 69). All the fungal isolates grew across a range of temperatures (8–34 °C) and optimally between 26 and 28 °C. Similarly, fungal infection of Thaumatotibia leucotreta Meyrick (Lepidoptera: Tortricidae) fifth instars occurred across a range of humidity levels (12%, 43%, 75%, 98%) regardless of fungal concentration, although external sporulation was restricted to treatments exposed to 98% relative humidity. It was concluded that neither temperature nor humidity, when considered alone, is likely to significantly influence the efficacy of any of the isolates in the field, given that they are active within temperature and humidity ranges experienced in South African citrus orchards.
- Full Text:
Temporal patterns and seasonal variation in microplastic loads in the water column and in the tissues of consumers along the southern and south-eastern coasts of South Africa
- Authors: Redelinghuys, Suzanne
- Date: 2020
- Subjects: Microplastics -- South Africa -- Eastern Cape , Plastic marine debris -- South Africa -- Eastern Cape , Marine pollution -- South Africa -- Eastern Cape , Ocean circulation -- South Africa -- Eastern Cape , Marine invertebrates -- Effect of pollution on -- South Africa -- Eastern Cape , Marine animals -- Effect of pollution on -- South Africa -- Eastern Cape , Mexilhao mussel -- Effect of pollution on -- South Africa -- Eastern Cape , Mytilus galloprovincialis -- Effect of pollution on -- South Africa -- Eastern Cape , Barnacles -- Effect of pollution on -- South Africa -- Eastern Cape , Tetraclita -- Effect of pollution on -- South Africa -- Eastern Cape , Octomeris angulosa -- Effect of pollution on -- South Africa -- Eastern Cape
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/115623 , vital:34201
- Description: Plastic pollution in the marine environment has become an environmental concern and a subject of ecological research. The field of microplastic pollution in particular has expanded dramatically in the last few years. Though much data exists on the spatial variability of microplastics in the marine environment globally, little is known about temporal variability, especially on short-term time scales in the southern hemisphere. Similarly, virtually nothing is known about the temporal patterns in microplastic ingestion by marine invertebrates, despite the fact that numerous studies have demonstrated that vertebrates and invertebrates routinely ingest microplastics with varied physiological effects. This study aimed to, 1) provide base-line data for microplastic loads in the nearshore environment along the Eastern Cape Province of South Africa over four short-term time scales: daily, weekly, monthly, and yearly; and, 2) assess whether there are any seasonal patterns in microplastics ingested by selected filter-feeding consumers at two sites along the southern and south-eastern Cape coastlines of South Africa. Results for part one of this study demonstrate no temporal patterns over the different time scales considered (ANOVA, p > 0.05 in all cases). Microplastic counts ranged on average from 55 ± 289 to 930 ± 462 microplastic particles.m-3. With the exception of two instances, microfibres constituted > 50 % (range: 47 to 97 %) of the total microplastic counts. Part two of this study assessed the size range of, and seasonal and spatial patterns in ingested microplastic. No significant differences were found in the number of microplastics ingested within seasons between the mussels Perna perna (Linnaeus, 1758) and Mytilus galloprovincialis (Lamarck, 1819), and the barnacles, Octomeris angulosa (Sowerby, 1825) and Tetraclita serrata (Darwin 1954) (Student’s t-test; d.f = 18; p > 0.05 in all cases), or between the two sites sampled, Kenton-on-Sea, Eastern Cape, and Wilderness, Western Cape (ANOVA; d.f. = 18; p > 0.05 in all cases). The nitric acid digestion technique was used to determine the presence of ingested microplastics. Microplastic loads ranged from 2 ± 1 to 33 ± 19 microplastics.g-1 wwt across all consumers, and the size of ingested microplastics ranged from 1 to 16 μm. Though highly variable, the absence of statistically significant differences in ingestion rates points to a ubiquity in the availability of microplastics within the water column over time and space.
- Full Text:
- Authors: Redelinghuys, Suzanne
- Date: 2020
- Subjects: Microplastics -- South Africa -- Eastern Cape , Plastic marine debris -- South Africa -- Eastern Cape , Marine pollution -- South Africa -- Eastern Cape , Ocean circulation -- South Africa -- Eastern Cape , Marine invertebrates -- Effect of pollution on -- South Africa -- Eastern Cape , Marine animals -- Effect of pollution on -- South Africa -- Eastern Cape , Mexilhao mussel -- Effect of pollution on -- South Africa -- Eastern Cape , Mytilus galloprovincialis -- Effect of pollution on -- South Africa -- Eastern Cape , Barnacles -- Effect of pollution on -- South Africa -- Eastern Cape , Tetraclita -- Effect of pollution on -- South Africa -- Eastern Cape , Octomeris angulosa -- Effect of pollution on -- South Africa -- Eastern Cape
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/115623 , vital:34201
- Description: Plastic pollution in the marine environment has become an environmental concern and a subject of ecological research. The field of microplastic pollution in particular has expanded dramatically in the last few years. Though much data exists on the spatial variability of microplastics in the marine environment globally, little is known about temporal variability, especially on short-term time scales in the southern hemisphere. Similarly, virtually nothing is known about the temporal patterns in microplastic ingestion by marine invertebrates, despite the fact that numerous studies have demonstrated that vertebrates and invertebrates routinely ingest microplastics with varied physiological effects. This study aimed to, 1) provide base-line data for microplastic loads in the nearshore environment along the Eastern Cape Province of South Africa over four short-term time scales: daily, weekly, monthly, and yearly; and, 2) assess whether there are any seasonal patterns in microplastics ingested by selected filter-feeding consumers at two sites along the southern and south-eastern Cape coastlines of South Africa. Results for part one of this study demonstrate no temporal patterns over the different time scales considered (ANOVA, p > 0.05 in all cases). Microplastic counts ranged on average from 55 ± 289 to 930 ± 462 microplastic particles.m-3. With the exception of two instances, microfibres constituted > 50 % (range: 47 to 97 %) of the total microplastic counts. Part two of this study assessed the size range of, and seasonal and spatial patterns in ingested microplastic. No significant differences were found in the number of microplastics ingested within seasons between the mussels Perna perna (Linnaeus, 1758) and Mytilus galloprovincialis (Lamarck, 1819), and the barnacles, Octomeris angulosa (Sowerby, 1825) and Tetraclita serrata (Darwin 1954) (Student’s t-test; d.f = 18; p > 0.05 in all cases), or between the two sites sampled, Kenton-on-Sea, Eastern Cape, and Wilderness, Western Cape (ANOVA; d.f. = 18; p > 0.05 in all cases). The nitric acid digestion technique was used to determine the presence of ingested microplastics. Microplastic loads ranged from 2 ± 1 to 33 ± 19 microplastics.g-1 wwt across all consumers, and the size of ingested microplastics ranged from 1 to 16 μm. Though highly variable, the absence of statistically significant differences in ingestion rates points to a ubiquity in the availability of microplastics within the water column over time and space.
- Full Text:
The alternative theory of state-minded protest texts in the music of democratic Nigeria:
- Authors: Osiebe, Garhe
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160423 , vital:40444 , DOI: 10.1080/21681392.2020.1810085
- Description: This paper centres on an alternative discourse of popular music culture in re-democratized Nigeria. Whereas much work has been done on state-minded protest music in Nigeria, studies have been reticent in appreciating the works of Fela's son, Femi; particularly within a framework of re-democratized Nigeria's equivalent of Fela's works which constituted a major alternative voice through military-ruled Nigeria. The paper is an attempt to make up this lacuna along the lines of Chris Atton’s 2006 alternative media theory. The analysis of the alternative media theory is complemented by an analysis of the texts of selected state-minded protest works from two crossover popular musicians – Blackface and Mr Raw – of re-democratized Nigeria, both of whose state-minded protest works have hitherto been unexplored by the academe.
- Full Text:
- Authors: Osiebe, Garhe
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/160423 , vital:40444 , DOI: 10.1080/21681392.2020.1810085
- Description: This paper centres on an alternative discourse of popular music culture in re-democratized Nigeria. Whereas much work has been done on state-minded protest music in Nigeria, studies have been reticent in appreciating the works of Fela's son, Femi; particularly within a framework of re-democratized Nigeria's equivalent of Fela's works which constituted a major alternative voice through military-ruled Nigeria. The paper is an attempt to make up this lacuna along the lines of Chris Atton’s 2006 alternative media theory. The analysis of the alternative media theory is complemented by an analysis of the texts of selected state-minded protest works from two crossover popular musicians – Blackface and Mr Raw – of re-democratized Nigeria, both of whose state-minded protest works have hitherto been unexplored by the academe.
- Full Text:
The archival turn: rereading the Guy Butler Collection in the National English Literary Museum
- Authors: Wyrill, Beth
- Date: 2020
- Subjects: National English Literary Museum (South Africa) , Butler, Guy, 1918-2001 , Archives -- South Africa , Archives -- Philosophy , Memory (Philosophy)
- Language: English
- Type: Thesis , Doctoral , PHD
- Identifier: http://hdl.handle.net/10962/145746 , vital:38463
- Description: This thesis takes as its theoretical springboard the ‘archival turn’ in South African historical studies, a moment that arguably reached its culmination in 2002 with the publication of Refiguring the Archive. The archival turn posits that, rather than using it as an unproblematic source of original material, scholars might begin to investigate the archive itself, including its processes of construction and organisation. This theoretical model also proposes that the archive might reflect the cultural beliefs and epistemologies common to the era in which it was set up. It seems that the time is ripe for a reconsideration of the insights gleaned from this academic moment in South Africa, given the recent contestation over the meanings of history and our cultural markers of heritage in the public domain, largely grouped under the term ‘Fallism.’ As such, a fresh look at South African museums, which in this country are often rooted in colonial practices of knowledge production, seems apt. This work uses the case of Guy Butler, founder of many South African English cultural institutes and arts bodies, as a conduit and lens for thinking through these problematics. One of Butler’s institutional ‘offspring,’ born from his overarching work on behalf of the English cultural and literary cause in South Africa in the twentieth century, is the National English Literary Museum (NELM). Investigating the founding context and practices of NELM is a useful way of exploring the impact of Butler’s life’s work on literary heritage in South Africa. Issues such as the way in which NELM and Grahamstown continue to signify as loci of thought and practice in the contemporary South African literary landscape will be addressed. The study draws extensively on the Butler collection at NELM, and spends much time investigating Butler’s positioning in a South African literary historical context in the twentieth century, to better understand the forces at work during the time of NELM’s coming-into-being. Derrida’s seminal work on the function of archives, in Archive Fever, is mined for a theoretical basis for the study, as is Deleuze and Guattari’s thought on how bodies (taking the NELM institution here to represent a ‘body’) form, change, and interact, explicated in the work A Thousand Plateaus. The study offers some insights into how the NELM archive was formed, and which forces continue to shape its work in the South African spheres of English literature and heritage.
- Full Text:
- Authors: Wyrill, Beth
- Date: 2020
- Subjects: National English Literary Museum (South Africa) , Butler, Guy, 1918-2001 , Archives -- South Africa , Archives -- Philosophy , Memory (Philosophy)
- Language: English
- Type: Thesis , Doctoral , PHD
- Identifier: http://hdl.handle.net/10962/145746 , vital:38463
- Description: This thesis takes as its theoretical springboard the ‘archival turn’ in South African historical studies, a moment that arguably reached its culmination in 2002 with the publication of Refiguring the Archive. The archival turn posits that, rather than using it as an unproblematic source of original material, scholars might begin to investigate the archive itself, including its processes of construction and organisation. This theoretical model also proposes that the archive might reflect the cultural beliefs and epistemologies common to the era in which it was set up. It seems that the time is ripe for a reconsideration of the insights gleaned from this academic moment in South Africa, given the recent contestation over the meanings of history and our cultural markers of heritage in the public domain, largely grouped under the term ‘Fallism.’ As such, a fresh look at South African museums, which in this country are often rooted in colonial practices of knowledge production, seems apt. This work uses the case of Guy Butler, founder of many South African English cultural institutes and arts bodies, as a conduit and lens for thinking through these problematics. One of Butler’s institutional ‘offspring,’ born from his overarching work on behalf of the English cultural and literary cause in South Africa in the twentieth century, is the National English Literary Museum (NELM). Investigating the founding context and practices of NELM is a useful way of exploring the impact of Butler’s life’s work on literary heritage in South Africa. Issues such as the way in which NELM and Grahamstown continue to signify as loci of thought and practice in the contemporary South African literary landscape will be addressed. The study draws extensively on the Butler collection at NELM, and spends much time investigating Butler’s positioning in a South African literary historical context in the twentieth century, to better understand the forces at work during the time of NELM’s coming-into-being. Derrida’s seminal work on the function of archives, in Archive Fever, is mined for a theoretical basis for the study, as is Deleuze and Guattari’s thought on how bodies (taking the NELM institution here to represent a ‘body’) form, change, and interact, explicated in the work A Thousand Plateaus. The study offers some insights into how the NELM archive was formed, and which forces continue to shape its work in the South African spheres of English literature and heritage.
- Full Text:
The benefits and challenges of implementing the Equator Principles: the case of four large banks in South Africa, through the eyes of project finance teams
- Authors: Baloyi, Glenda
- Date: 2020
- Subjects: Financial institutions -- South Africa -- Moral and ethical aspects , Sustainable development -- South Africa , Project management -- South Africa -- Finance
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/126165 , vital:35855
- Description: The purpose of this research was to investigate the benefits and challenges of implementing the Equator Principles (EPs) by the four large banks in South Africa who are signatories to the framework. This was investigated through the eyes of the project finance teams. The research focused on the perceptions of the project finance team. The EPs are voluntary standards, to date they have been adopted by 94 financial institutions. Financial institutions that have adopted the EPs, benefit by having a competitive advantage of getting involved with high risk projects / developments. The Equator Principles resulted in having environmental and social risk policies and structures to manage these risks. This research was conducted using mixed methods and followed the post-positivist paradigm. The research found that the project finance teams were aware of the environmental, social and governance risks associated with project finance transactions. Furthermore, they understood the need to have the Environmental, Social and Governance (ESG) risk assessment during the credit process. This research found out that the benefits of the EPs outweigh the challenges, as they promote responsible investment, thus promoting the reputation of the investor. The EPs requires the client / borrower to conduct an environmental and social impact assessment and commit to covenants that are binding in the financial legal agreements. By having processes and strategies that promote responsible investment in the financed projects / development, this gives the Equator Principles Financial Institution (EPFI) the advantage of competing in the international market. EPs may indirectly influence the financial institutions that have not adopted the EPs, to promote responsible investment by applying ESG risk assessment processes as required by the banks that have adopted the EPs. EPs lack of capacity such as human resources, policies, funds and structures is the reason why companies do not adopt responsible investment is their operation and not incorporating them in the decision-making process. Some EPFI are not committed the EPs and become free riders. Other EPFI are not complying with the EPs and this causes uncertainties with regards to the legitimacy of the ES standards. EPs are ambiguous, subjective and voluntarism can make it difficult to be achieved by the EPFI. EPs increases the approval process for the financial institution to conclude the transaction, thus delaying the start of a needed project / development. And that EPFI may be forced to have fewer clients as a result of the funding requirements required by EPs.
- Full Text:
- Authors: Baloyi, Glenda
- Date: 2020
- Subjects: Financial institutions -- South Africa -- Moral and ethical aspects , Sustainable development -- South Africa , Project management -- South Africa -- Finance
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/126165 , vital:35855
- Description: The purpose of this research was to investigate the benefits and challenges of implementing the Equator Principles (EPs) by the four large banks in South Africa who are signatories to the framework. This was investigated through the eyes of the project finance teams. The research focused on the perceptions of the project finance team. The EPs are voluntary standards, to date they have been adopted by 94 financial institutions. Financial institutions that have adopted the EPs, benefit by having a competitive advantage of getting involved with high risk projects / developments. The Equator Principles resulted in having environmental and social risk policies and structures to manage these risks. This research was conducted using mixed methods and followed the post-positivist paradigm. The research found that the project finance teams were aware of the environmental, social and governance risks associated with project finance transactions. Furthermore, they understood the need to have the Environmental, Social and Governance (ESG) risk assessment during the credit process. This research found out that the benefits of the EPs outweigh the challenges, as they promote responsible investment, thus promoting the reputation of the investor. The EPs requires the client / borrower to conduct an environmental and social impact assessment and commit to covenants that are binding in the financial legal agreements. By having processes and strategies that promote responsible investment in the financed projects / development, this gives the Equator Principles Financial Institution (EPFI) the advantage of competing in the international market. EPs may indirectly influence the financial institutions that have not adopted the EPs, to promote responsible investment by applying ESG risk assessment processes as required by the banks that have adopted the EPs. EPs lack of capacity such as human resources, policies, funds and structures is the reason why companies do not adopt responsible investment is their operation and not incorporating them in the decision-making process. Some EPFI are not committed the EPs and become free riders. Other EPFI are not complying with the EPs and this causes uncertainties with regards to the legitimacy of the ES standards. EPs are ambiguous, subjective and voluntarism can make it difficult to be achieved by the EPFI. EPs increases the approval process for the financial institution to conclude the transaction, thus delaying the start of a needed project / development. And that EPFI may be forced to have fewer clients as a result of the funding requirements required by EPs.
- Full Text:
The birds of Fort Fordyce Reserve, Eastern Cape
- Craig, Adrian J F K, Hulley, Patrick E
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449897 , vital:74862 , https://doi.org/10.15641/bo.v11i0.687
- Description: The avifauna of this forest reserve has been surveyed, based on observations and mist-netting over a ten-year period. We have recorded 175 species, of which 56 are considered" true" forest birds in this region. These include four summer migrants, and four occasional visitors; the others are likely to be resident. Four species of conservation concern, the Knysna Woodpecker, African Crowned Eagle, Lanner Falcon and Bush Blackcap probably nest within the protected area.
- Full Text:
- Authors: Craig, Adrian J F K , Hulley, Patrick E
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/449897 , vital:74862 , https://doi.org/10.15641/bo.v11i0.687
- Description: The avifauna of this forest reserve has been surveyed, based on observations and mist-netting over a ten-year period. We have recorded 175 species, of which 56 are considered" true" forest birds in this region. These include four summer migrants, and four occasional visitors; the others are likely to be resident. Four species of conservation concern, the Knysna Woodpecker, African Crowned Eagle, Lanner Falcon and Bush Blackcap probably nest within the protected area.
- Full Text:
The catchup games: a novella
- Authors: Nstumpa, Siya
- Date: 2020
- Subjects: South African fiction (English)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/167222 , vital:41448
- Description: Creative work portfolio.
- Full Text:
- Authors: Nstumpa, Siya
- Date: 2020
- Subjects: South African fiction (English)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/167222 , vital:41448
- Description: Creative work portfolio.
- Full Text:
The conundrums of counselling women in violent intimate partner relationships in South Africa: implications for practice
- Fleischack, Anne, Macleod, Catriona I, Böhmke, Werner
- Authors: Fleischack, Anne , Macleod, Catriona I , Böhmke, Werner
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444117 , vital:74191 , xlink:href="https://doi.org/10.1007/s10447-019-09384-8"
- Description: Little research focuses on how counsellors experience counselling encounters concerning intimate partner violence. This study reports on narrative research conducted with eight South African non-governmental organisation counsellors. Participants spoke of creating productive and caring counselling dynamics, and providing non-directive counselling. However, they also indicated providing moral guidance, particularly in cases where pregnancy or children were involved. Success was viewed rather narrowly as the women leaving the relationship, setting up ‘all-or-nothing’ outcomes. Such ‘success’ led to counsellor happiness, whilst failure in this regard led to counsellors experiencing anger and burn-out. We conclude that the conundrums evident in these data are grounded in patriarchal systems, limiting the efficacy of counselling based on a bondage and deliverance narrative. Implications for practice and training are also outlined.
- Full Text:
- Authors: Fleischack, Anne , Macleod, Catriona I , Böhmke, Werner
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/444117 , vital:74191 , xlink:href="https://doi.org/10.1007/s10447-019-09384-8"
- Description: Little research focuses on how counsellors experience counselling encounters concerning intimate partner violence. This study reports on narrative research conducted with eight South African non-governmental organisation counsellors. Participants spoke of creating productive and caring counselling dynamics, and providing non-directive counselling. However, they also indicated providing moral guidance, particularly in cases where pregnancy or children were involved. Success was viewed rather narrowly as the women leaving the relationship, setting up ‘all-or-nothing’ outcomes. Such ‘success’ led to counsellor happiness, whilst failure in this regard led to counsellors experiencing anger and burn-out. We conclude that the conundrums evident in these data are grounded in patriarchal systems, limiting the efficacy of counselling based on a bondage and deliverance narrative. Implications for practice and training are also outlined.
- Full Text:
The COVID-19 crisis and the South African informal economy
- Rogan, Michael, Skinner, Caroline
- Authors: Rogan, Michael , Skinner, Caroline
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/478040 , vital:78149 , ISBN
- Description: This paper presents findings from a study on the impact of the COVID-19 crisis on informal workers in 11 cities across 5 regions of the world (Asia, Africa, Latin America, North America and East-ern Europe). A unique feature of the study is that it examines the degree–and pathways–of impact on different sectors of informal workers and, within sectors, by key variables (status in employ-ment, place of work, goods/services provided, and gender). Also, the study provides insights from informal workers in their own words. The paper concludes with common demands for recovery by local organizations of informal workers and a call for a Better New Deal for informal workers. The study methods included a survey questionnaire for informal workers and in-depth interviews with informal worker leaders and organizers as well as repre-sentatives of government, civil society and academia. The survey was conducted by mobile phone and collected information on the ability to work, working hours, earnings and sector-specific con-straints to livelihoods at three points in time: mid-2020 (June–July) when the survey was carried out and two recall periods–April 2020 (period of peak lockdowns or restrictions in all study cities) and February 2020 (pre-COVID-19 reference period). The survey also collected information on health and safety, food security and hunger, care and other household responsibilities, relief measures and household coping strategies.
- Full Text:
- Authors: Rogan, Michael , Skinner, Caroline
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/478040 , vital:78149 , ISBN
- Description: This paper presents findings from a study on the impact of the COVID-19 crisis on informal workers in 11 cities across 5 regions of the world (Asia, Africa, Latin America, North America and East-ern Europe). A unique feature of the study is that it examines the degree–and pathways–of impact on different sectors of informal workers and, within sectors, by key variables (status in employ-ment, place of work, goods/services provided, and gender). Also, the study provides insights from informal workers in their own words. The paper concludes with common demands for recovery by local organizations of informal workers and a call for a Better New Deal for informal workers. The study methods included a survey questionnaire for informal workers and in-depth interviews with informal worker leaders and organizers as well as repre-sentatives of government, civil society and academia. The survey was conducted by mobile phone and collected information on the ability to work, working hours, earnings and sector-specific con-straints to livelihoods at three points in time: mid-2020 (June–July) when the survey was carried out and two recall periods–April 2020 (period of peak lockdowns or restrictions in all study cities) and February 2020 (pre-COVID-19 reference period). The survey also collected information on health and safety, food security and hunger, care and other household responsibilities, relief measures and household coping strategies.
- Full Text:
The crystal structure of 2-oxo-2H-chromen-4-yl acetate, C11H8O4
- Hulushe, Siyabonga T, Manyeruke, Meloddy H, Hosten, Eric C, Kaye, Perry, Watkins, Gareth M
- Authors: Hulushe, Siyabonga T , Manyeruke, Meloddy H , Hosten, Eric C , Kaye, Perry , Watkins, Gareth M
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/194048 , vital:45418 , xlink:href="https://doi.org/10.1515/ncrs-2019-0698"
- Description: C11H8O4, monoclinic, P21/c (no. 14), a = 4.5947(2) Å, b = 10.5414(3) Å, c = 19.1611(7) Å, β = 94.084(2)°, V = 925.70(6) Å3, Z = 4, Rgt(F) = 0.0376, wRref(F 2) = 0.1109,T = 200(2) K.CCDC no.: 1906383
- Full Text:
- Authors: Hulushe, Siyabonga T , Manyeruke, Meloddy H , Hosten, Eric C , Kaye, Perry , Watkins, Gareth M
- Date: 2020
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/194048 , vital:45418 , xlink:href="https://doi.org/10.1515/ncrs-2019-0698"
- Description: C11H8O4, monoclinic, P21/c (no. 14), a = 4.5947(2) Å, b = 10.5414(3) Å, c = 19.1611(7) Å, β = 94.084(2)°, V = 925.70(6) Å3, Z = 4, Rgt(F) = 0.0376, wRref(F 2) = 0.1109,T = 200(2) K.CCDC no.: 1906383
- Full Text:
The cultural history of Augustan Rome: texts, monuments, and topography ed. by Matthew P. Loar et al
- Authors: Pandey, Nandini B
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/149658 , vital:38872 , https://muse.jhu.edu/article/755534
- Description: This edited collection, the product of a 2014 conference at Notre Dame's Rome Global Gateway, asks "what the texts in, on, and about the city of Rome tell us about how the ancients thought about, interacted with, and responded to the city during the transition from Republic to Empire" (1). Given the enormity of the topic, this slender volume makes no claim to comprehensive treatment. What it offers, instead, is a high-quality sampling with suggestions for future research (8-9) that will reward anyone interested in responsions between Augustan writing and building.
- Full Text:
The cultural history of Augustan Rome: texts, monuments, and topography ed. by Matthew P. Loar et al
- Authors: Pandey, Nandini B
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/149658 , vital:38872 , https://muse.jhu.edu/article/755534
- Description: This edited collection, the product of a 2014 conference at Notre Dame's Rome Global Gateway, asks "what the texts in, on, and about the city of Rome tell us about how the ancients thought about, interacted with, and responded to the city during the transition from Republic to Empire" (1). Given the enormity of the topic, this slender volume makes no claim to comprehensive treatment. What it offers, instead, is a high-quality sampling with suggestions for future research (8-9) that will reward anyone interested in responsions between Augustan writing and building.
- Full Text:
The current nature of intra-regional trade in the proposed tripartite free trade area
- Authors: Chibuta, Chisengele
- Date: 2020
- Subjects: Customs unions -- Africa, Southern -- Economic integration , Africa, Southern -- Economic policy , Africa, Southern -- Economic integration , Africa, Southern -- Economic conditions , Tripartite Free Trade Area , Free trade -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/146744 , vital:38553
- Description: This thesis examines and analyses the current nature of intra-regional trade between member states of the proposed Tripartite Free Trade Area in order to contribute to an understanding of the potential for intra-regional trade within the region to increase. Trade Complementarity Indexes were used to determine how well the structures of the three founding blocs’ major imports and exports match. The results show that there is a high degree of trade complementarity in the trade of the top 5 major products traded between the regional groups. With the proposed TFTA in place, high trade complementarity could lead to increased trade between the regional groups. Trade Intensity Indexes were used to determine how intensively the three founding blocs trade with one another. Results from the indexes help determine the extent to which the blocs currently view each other as important trading partners and the implications of this for the proposed TFTA. Results show that EAC and SADC as well as EAC and COMESA viewed each other as significant trading partners while SADC and COMESA did not for the majority of the years from 2001 to 2018. With the TFTA in place, intra-regional trade could be strengthened among the members who currently trade intensively because tariffs between them would be progressively eliminated as required by the TFTA Agreement. Revealed Comparative Advantage Indexes were used to gain insights on whether member states have any comparative advantage in their top 5 exports. Results from the indexes were used to determine whether member states have comparative advantage in similar or dissimilar major exports and the implications of this for the proposed TFTA. Results show that member states have revealed comparative advantage in similar products and these products present opportunities for joint-production among member states as well as sectors for product development once the proposed TFTA is in place. Revealed Trade Barrier Indexes were used to gain insights into the extent of ease of market access into each regional bloc’s market. Results from the indexes indicate whether major products imported from each other receive possibly discriminatory or preferential treatment. The results indicate that the majority of the top 5 imports sourced from each region receive preferential treatment. This indicates that there is ease of market access for the top 5 imports sourced from each other and this could promote increased intra-regional trade among member states in these product categories because tariff and non-tariff barriers to trade will be progressively eliminated once the TFTA is in place.
- Full Text:
- Authors: Chibuta, Chisengele
- Date: 2020
- Subjects: Customs unions -- Africa, Southern -- Economic integration , Africa, Southern -- Economic policy , Africa, Southern -- Economic integration , Africa, Southern -- Economic conditions , Tripartite Free Trade Area , Free trade -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/146744 , vital:38553
- Description: This thesis examines and analyses the current nature of intra-regional trade between member states of the proposed Tripartite Free Trade Area in order to contribute to an understanding of the potential for intra-regional trade within the region to increase. Trade Complementarity Indexes were used to determine how well the structures of the three founding blocs’ major imports and exports match. The results show that there is a high degree of trade complementarity in the trade of the top 5 major products traded between the regional groups. With the proposed TFTA in place, high trade complementarity could lead to increased trade between the regional groups. Trade Intensity Indexes were used to determine how intensively the three founding blocs trade with one another. Results from the indexes help determine the extent to which the blocs currently view each other as important trading partners and the implications of this for the proposed TFTA. Results show that EAC and SADC as well as EAC and COMESA viewed each other as significant trading partners while SADC and COMESA did not for the majority of the years from 2001 to 2018. With the TFTA in place, intra-regional trade could be strengthened among the members who currently trade intensively because tariffs between them would be progressively eliminated as required by the TFTA Agreement. Revealed Comparative Advantage Indexes were used to gain insights on whether member states have any comparative advantage in their top 5 exports. Results from the indexes were used to determine whether member states have comparative advantage in similar or dissimilar major exports and the implications of this for the proposed TFTA. Results show that member states have revealed comparative advantage in similar products and these products present opportunities for joint-production among member states as well as sectors for product development once the proposed TFTA is in place. Revealed Trade Barrier Indexes were used to gain insights into the extent of ease of market access into each regional bloc’s market. Results from the indexes indicate whether major products imported from each other receive possibly discriminatory or preferential treatment. The results indicate that the majority of the top 5 imports sourced from each region receive preferential treatment. This indicates that there is ease of market access for the top 5 imports sourced from each other and this could promote increased intra-regional trade among member states in these product categories because tariff and non-tariff barriers to trade will be progressively eliminated once the TFTA is in place.
- Full Text:
The current role of palm species Hyphaene Coriacea and Phoenix Reclanata in local livelihoods in the Zitundo area, southern Mozambique
- Authors: Martins, Angelina R O
- Date: 2020
- Subjects: Ilala palm -- Economic aspects -- Mozambique , Palms -- Economic aspects -- Mozambique , Non-timber forest products industry -- Mozambique , Sustainable development -- Mozambique , Conservation of natural resources -- Mozambique
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/150613 , vital:38989
- Description: The majority of rural households in developing countries are heavily dependent on non-timber forest products (NTFPs) to fulfill much of their basic daily needs. In Mozambique more than 64% of the population lives in rural areas and depends heavily in the extraction of NTFPs to complement agricultural production. One substantial source of NTFPs are palm species. Palms are sources of food, building materials, cloth, ornaments, medicines, and are also used for cultural purposes. In southern Mozambique two important palms species used as NTFPs are Hyphaene coriacea and Phoenix reclinata. These two species provide an array of subsistence and commercial products. The sap, leaves and stems of these two palms are harvested by local people as sources of traditional beverages, weaving, roofing, fencing and furniture material as well as other household utensils. The effects (if any) of harvesting of these palm products on palm distribution, population structure, dynamics and viability have never been examined, and thus the sustainability of the practices and benefits flows to local livelihoods are unknow-n. Any effects harvesting effects may also be exacerbated by predicted climate change for the area. The present study aims to investigate the role of the palm species Hyphaene coriacea and Phoenix reclinata in the livelihoods of households in the Zitundo area, Matutuine district, southern Mozambique and under future climate scenarios. Specifically, this study: i) evaluates the abundance, population structure and harvesting selection of these species; ii) characterizes the ethnobotanical knowledge and use of the two species; iii) examines the local production and trade of palm wine in the area; iv) examines the contribution of palm income to livelihoods and income diversification in area; v) describes the local management practices and perceptions on palm productivity and abundance; and vi) models the current and future distribution of the these palm species in the area. To evaluate the abundance, population structure and stability of these two palm species a population census was carried out, and the size class distribution, Simpson index of dominance, permutation index and the quotient between successive size classes were calculated. I further calculated the preference ratio for specific size classes. Additionally a questionnaire survey was conducted with 179 randomly selected households from the 16 villages in the study area to characterize the ethnobotanical knowledge and use of these two species, as well as to examine the contribution of palm income to livelihoods and diversification. Standard ethnobotanical indices were used as measures of each palm species use and knowledge while principal component analysis and cluster analysis were applied to highlight the livelihood patterns and the role of diversification and of palm income in local livelihoods. Structured interviews with 37 palm tappers were additionally used to examine the local production and trade of palm wine in the area, while both the household survey and palm tappers interviews, were employed to investigate the local management practices and perceptions on palms productivity and abundance. Maxent Software was used to model the current and future under climate change distribution of the two palm species. Hyphaene coriacea was more abundant than Phoenix reclinata. Both species exhibited steep negative slopes in the regression analyses of size class distribution, indicating the presence of more individuals in shorter size classes. Although there was a dominance of shorter over taller size classes, limited recruitment was observed through low stem densities of seedlings and juveniles compared to the 1-50 cm size class The Simpson index of dominance, the permutation index, and the fluctuating quotients between the consecutive size classes showed a level of instability in both populations. Hyphaene coriacea appeared to be more resilient to tapping than Phoenix reclinata as showed by the higher rate of stem survival after tapping. Hyphaene coriacea was favored for tapping compared to Phoenix reclinata. The most preferred size class to tap for both species was between 101cm and 150 cm. Currently the distribution of Hyphaene coriacea and Phoenix reclinata was mostly confined to the eastern side of the study area. Most of the area was predicted as unsuitable for both palm species, with less than six percent predicted to be suitable or higher. The occurrence of both species appeared to be influenced mostly by water related variables, such as precipitation, and distance to rivers and distance to water bodies. The habitat suitability for Hyphaene coriacea was predicted to increase under future climate conditions scenarios, while little variation was predicted for Phoenix reclinata distribution. The knowledge about the uses of these two palm species was widespread in the area, although only 32% of respondents were engaged in palm exploitation. Thirteen palm products were exploited, with palm wine production from the sap of both palms being the dominant activity, followed by broom production from Phoenix reclinata stems and basket production from Hyphaene coriacea leaves. The cultural importance of these species included the production of anklets and skirts used during traditional dances and the use of palm wine in the traditional ritual of libation. Palm tapping was practiced year round in five of the sixteen villages in the area. Palm tapping was an important livelihood activity, contributing over 80% of tappers’ total annual income, and tappers earned up to three times more than the national minimum wage for the agricultural and forestry sector. Palm wine was also a highly commercial commodity in Zitundo area, with an average commercialization index above 60%. The income from palm wine sales showed an important role in mitigating the level of poverty in the area. Palm income accounted for over 60% reduction on poverty incidence among palm tappers. Households in Zitundo further engaged in some level of livelihood diversification. The majority of households adopted a wage-based strategy, although this strategy was among the less remunerative in terms of per capita cash income. A palm-based livelihood strategy, although adopted only by 11% of households, was one of the most remunerative strategies. Palm income played a vital role in enhancing household livelihoods and mitigating poverty in the area as shown by the lower poverty incidences among households engaged in the palm-based livelihood strategy than alternatives strategies. The village of household residency, along with household demographic and socio-economic characteristics appeared to determine the knowledge and exploitation level of palms as well as a households’ choice of livelihood strategy, level of palm wine returns, commercialization index and palm income dependency. The importance of palms in local livelihoods and poverty alleviation needs greater acknowledgement by government and development agencies in the area. Palm wine, broom and basket production have a high potential for income generation, and therefore should be included in future local development policies and poverty reduction strategies. Although palms are an open access resource in Zitundo area, the perception is that they are abundant and that tapping does not have many detrimental effects. However, this study found some negative impacts of tapping on the recruitment of both palms species. The inclusion of palm products in future development programs and poverty reduction strategies will require the design of participatory conservation and management strategies that involve all palm users groups and others stakeholders and include long-term participatory monitoring of the effect of palm use on the populations.
- Full Text:
- Authors: Martins, Angelina R O
- Date: 2020
- Subjects: Ilala palm -- Economic aspects -- Mozambique , Palms -- Economic aspects -- Mozambique , Non-timber forest products industry -- Mozambique , Sustainable development -- Mozambique , Conservation of natural resources -- Mozambique
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/150613 , vital:38989
- Description: The majority of rural households in developing countries are heavily dependent on non-timber forest products (NTFPs) to fulfill much of their basic daily needs. In Mozambique more than 64% of the population lives in rural areas and depends heavily in the extraction of NTFPs to complement agricultural production. One substantial source of NTFPs are palm species. Palms are sources of food, building materials, cloth, ornaments, medicines, and are also used for cultural purposes. In southern Mozambique two important palms species used as NTFPs are Hyphaene coriacea and Phoenix reclinata. These two species provide an array of subsistence and commercial products. The sap, leaves and stems of these two palms are harvested by local people as sources of traditional beverages, weaving, roofing, fencing and furniture material as well as other household utensils. The effects (if any) of harvesting of these palm products on palm distribution, population structure, dynamics and viability have never been examined, and thus the sustainability of the practices and benefits flows to local livelihoods are unknow-n. Any effects harvesting effects may also be exacerbated by predicted climate change for the area. The present study aims to investigate the role of the palm species Hyphaene coriacea and Phoenix reclinata in the livelihoods of households in the Zitundo area, Matutuine district, southern Mozambique and under future climate scenarios. Specifically, this study: i) evaluates the abundance, population structure and harvesting selection of these species; ii) characterizes the ethnobotanical knowledge and use of the two species; iii) examines the local production and trade of palm wine in the area; iv) examines the contribution of palm income to livelihoods and income diversification in area; v) describes the local management practices and perceptions on palm productivity and abundance; and vi) models the current and future distribution of the these palm species in the area. To evaluate the abundance, population structure and stability of these two palm species a population census was carried out, and the size class distribution, Simpson index of dominance, permutation index and the quotient between successive size classes were calculated. I further calculated the preference ratio for specific size classes. Additionally a questionnaire survey was conducted with 179 randomly selected households from the 16 villages in the study area to characterize the ethnobotanical knowledge and use of these two species, as well as to examine the contribution of palm income to livelihoods and diversification. Standard ethnobotanical indices were used as measures of each palm species use and knowledge while principal component analysis and cluster analysis were applied to highlight the livelihood patterns and the role of diversification and of palm income in local livelihoods. Structured interviews with 37 palm tappers were additionally used to examine the local production and trade of palm wine in the area, while both the household survey and palm tappers interviews, were employed to investigate the local management practices and perceptions on palms productivity and abundance. Maxent Software was used to model the current and future under climate change distribution of the two palm species. Hyphaene coriacea was more abundant than Phoenix reclinata. Both species exhibited steep negative slopes in the regression analyses of size class distribution, indicating the presence of more individuals in shorter size classes. Although there was a dominance of shorter over taller size classes, limited recruitment was observed through low stem densities of seedlings and juveniles compared to the 1-50 cm size class The Simpson index of dominance, the permutation index, and the fluctuating quotients between the consecutive size classes showed a level of instability in both populations. Hyphaene coriacea appeared to be more resilient to tapping than Phoenix reclinata as showed by the higher rate of stem survival after tapping. Hyphaene coriacea was favored for tapping compared to Phoenix reclinata. The most preferred size class to tap for both species was between 101cm and 150 cm. Currently the distribution of Hyphaene coriacea and Phoenix reclinata was mostly confined to the eastern side of the study area. Most of the area was predicted as unsuitable for both palm species, with less than six percent predicted to be suitable or higher. The occurrence of both species appeared to be influenced mostly by water related variables, such as precipitation, and distance to rivers and distance to water bodies. The habitat suitability for Hyphaene coriacea was predicted to increase under future climate conditions scenarios, while little variation was predicted for Phoenix reclinata distribution. The knowledge about the uses of these two palm species was widespread in the area, although only 32% of respondents were engaged in palm exploitation. Thirteen palm products were exploited, with palm wine production from the sap of both palms being the dominant activity, followed by broom production from Phoenix reclinata stems and basket production from Hyphaene coriacea leaves. The cultural importance of these species included the production of anklets and skirts used during traditional dances and the use of palm wine in the traditional ritual of libation. Palm tapping was practiced year round in five of the sixteen villages in the area. Palm tapping was an important livelihood activity, contributing over 80% of tappers’ total annual income, and tappers earned up to three times more than the national minimum wage for the agricultural and forestry sector. Palm wine was also a highly commercial commodity in Zitundo area, with an average commercialization index above 60%. The income from palm wine sales showed an important role in mitigating the level of poverty in the area. Palm income accounted for over 60% reduction on poverty incidence among palm tappers. Households in Zitundo further engaged in some level of livelihood diversification. The majority of households adopted a wage-based strategy, although this strategy was among the less remunerative in terms of per capita cash income. A palm-based livelihood strategy, although adopted only by 11% of households, was one of the most remunerative strategies. Palm income played a vital role in enhancing household livelihoods and mitigating poverty in the area as shown by the lower poverty incidences among households engaged in the palm-based livelihood strategy than alternatives strategies. The village of household residency, along with household demographic and socio-economic characteristics appeared to determine the knowledge and exploitation level of palms as well as a households’ choice of livelihood strategy, level of palm wine returns, commercialization index and palm income dependency. The importance of palms in local livelihoods and poverty alleviation needs greater acknowledgement by government and development agencies in the area. Palm wine, broom and basket production have a high potential for income generation, and therefore should be included in future local development policies and poverty reduction strategies. Although palms are an open access resource in Zitundo area, the perception is that they are abundant and that tapping does not have many detrimental effects. However, this study found some negative impacts of tapping on the recruitment of both palms species. The inclusion of palm products in future development programs and poverty reduction strategies will require the design of participatory conservation and management strategies that involve all palm users groups and others stakeholders and include long-term participatory monitoring of the effect of palm use on the populations.
- Full Text:
The degree, extent and value of air temperature amelioration by urban green spaces in Bulawayo, Zimbabwe:
- Ngulani, T, Shackleton, Charlie M
- Authors: Ngulani, T , Shackleton, Charlie M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/176061 , vital:42656 , https://doi.org/10.1080/03736245.2019.1685405
- Description: Urban greenery provide a variety of goods and services to city dwellers. A core one is amelioration of the urban heat island effect. However, the many estimates from temperate regions cannot be extrapolated to the tropics, where more empirical studies are required to guide urban planning and optimization of green infrastructure design and distribution. This study reports on the temperature differentials in fortnightly readings, in winter and summer, between 12 urban green spaces and the surrounding built-up urban matrix at increasing distances from each green space. Additionally, the value of energy costs saved for air conditioning by urban greenery was calculated.
- Full Text:
- Authors: Ngulani, T , Shackleton, Charlie M
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/176061 , vital:42656 , https://doi.org/10.1080/03736245.2019.1685405
- Description: Urban greenery provide a variety of goods and services to city dwellers. A core one is amelioration of the urban heat island effect. However, the many estimates from temperate regions cannot be extrapolated to the tropics, where more empirical studies are required to guide urban planning and optimization of green infrastructure design and distribution. This study reports on the temperature differentials in fortnightly readings, in winter and summer, between 12 urban green spaces and the surrounding built-up urban matrix at increasing distances from each green space. Additionally, the value of energy costs saved for air conditioning by urban greenery was calculated.
- Full Text:
The determination of whether a Unified Communication System can be effective in supporting informal communication and collaboration in virtual teams
- Authors: Hill, Kyle
- Date: 2020
- Subjects: Telecommuting , Virtual work teams , Telecommunication systems , Computer networks
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/146343 , vital:38517
- Description: The overall objective of the research is to determine whether a Unified Communication System intervention can be effective in supporting informal communication and collaboration in virtual teams. In so doing, this research is aimed at developing a current framework of critical success factors for facilitating informal collaboration and communication. As teams have evolved to the point where there is no longer a need for team members to be co-located, with a greater importance now being placed on how they collaborate, this framework will also highlight how it can support virtual teams due to the huge potential advantage they can provide to the organisation. A virtual communication and collaboration system will be selected based on the outputs of the current framework and interactions which occur through the system will be observed to provide quantitative and qualitative results. In conclusion, the research will suggest recommendations for the successful implementation of informal communication and collaboration technologies within the organisation. The research will also indicate to a limited degree, the impact of the implementation of these technologies, and the outcome for the organisation, whether positive or negative. Whilst conducting the research, it became apparent that while the UCS was capable of performing the processes and functions required, the individuals and teams engaging with the technology did not always make use of the full scope of the technology provided. Regardless, a UCS was observed to provide direct benefits to an organisation in increasing communication and collaboration in the organisation. These increases can be observed in both the physical and virtual sense. However, the converse is true for generating social capital which lead to the observation that there are a smaller number of interactions happening in the smaller teams, but these are of higher value when compared to the larger teams of this study. It is also clear that the larger a team becomes, the more the trend is to focus on adopting new technologies to make their roles more efficient. This adoption is not however translated into outputs such as social capital but is translated into stronger networks and the formation of new networks. It is also clear that most negative factors around the UCS are related to the respondent’s hardware rather than the solution itself. Cost reductions because of virtuality will also be observed and using the Developed Framework as a blue print, an organisation should be able to observe direct benefits for an organisation by being able to confirm the thesis of this research in that having a UCS intervention is effective in supporting informal communication and collaboration in virtual teams.
- Full Text:
- Authors: Hill, Kyle
- Date: 2020
- Subjects: Telecommuting , Virtual work teams , Telecommunication systems , Computer networks
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/146343 , vital:38517
- Description: The overall objective of the research is to determine whether a Unified Communication System intervention can be effective in supporting informal communication and collaboration in virtual teams. In so doing, this research is aimed at developing a current framework of critical success factors for facilitating informal collaboration and communication. As teams have evolved to the point where there is no longer a need for team members to be co-located, with a greater importance now being placed on how they collaborate, this framework will also highlight how it can support virtual teams due to the huge potential advantage they can provide to the organisation. A virtual communication and collaboration system will be selected based on the outputs of the current framework and interactions which occur through the system will be observed to provide quantitative and qualitative results. In conclusion, the research will suggest recommendations for the successful implementation of informal communication and collaboration technologies within the organisation. The research will also indicate to a limited degree, the impact of the implementation of these technologies, and the outcome for the organisation, whether positive or negative. Whilst conducting the research, it became apparent that while the UCS was capable of performing the processes and functions required, the individuals and teams engaging with the technology did not always make use of the full scope of the technology provided. Regardless, a UCS was observed to provide direct benefits to an organisation in increasing communication and collaboration in the organisation. These increases can be observed in both the physical and virtual sense. However, the converse is true for generating social capital which lead to the observation that there are a smaller number of interactions happening in the smaller teams, but these are of higher value when compared to the larger teams of this study. It is also clear that the larger a team becomes, the more the trend is to focus on adopting new technologies to make their roles more efficient. This adoption is not however translated into outputs such as social capital but is translated into stronger networks and the formation of new networks. It is also clear that most negative factors around the UCS are related to the respondent’s hardware rather than the solution itself. Cost reductions because of virtuality will also be observed and using the Developed Framework as a blue print, an organisation should be able to observe direct benefits for an organisation by being able to confirm the thesis of this research in that having a UCS intervention is effective in supporting informal communication and collaboration in virtual teams.
- Full Text:
The development of teacher leadership: a formative interventionist study in a semi-urban secondary school of Khomas region in Namibia
- Authors: Shilongo, Justina
- Date: 2020
- Subjects: Educational leadership -- Namibia , Educational leadership -- Namibia -- Case studies , Education -- Namibia
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/144923 , vital:38392
- Description: Historically the education system in Namibia was shaped by the policies of the apartheid ideology (Amukugo, 1993). During that time, authority and responsibility were centralised and teachers were not part of the decision making process. By then, most people expected to be told what to do and would not initiate something on their own, a culture inherited that even exists today. In addition, opportunities were not given to teachers to develop as leaders. While Namibians have this history on record, the fact remains that the way in which apartheid laws were put in place, the ideological basis of the policy of apartheid and its impact, was not supportive of the ideas of democracy that Namibia is advocating for today. Despite a number of series of policy guidelines and directives issued to guide the development of a democratic culture in the education sector, less is happening about the leadership of teachers in schools. This stimulated me to conduct an activity theoretical interventionist research, aimed at exploring what opportunities there are for teachers to develop as leaders. This study is a case study, operating from a generative standpoint. The study was conducted in a semi-urban secondary school in Windhoek, Khomas Region, Namibia. The study took a formative intervention approach as it sought to bring about change to practice in the case study school and also to contribute to a body of knowledge in the field of study. This qualitative study employed interviews, observations, document analysis and WhatsApp messaging as data generation tools. Crystallised data revealed multiple realities that demonstrated meaningful and trustworthy data. To analyse data the study employed inductive and abductive analysis to make data meaningful to the reader. Thus, to explore teacher leadership development in a semi-urban secondary school, Change Laboratories Workshops was used as a method to gather and analyse data, as underpinned by 2nd generation CHAT. Grant’s (2017) model of teacher leadership was also used to analyse the data and indicate where teacher leadership roles were mostly visible from all four zones. The findings revealed that there were different understandings of the notion of teacher leadership. It was understood as the possession of certain qualities, a managerial role, an involvement in the decision-making process and a form of social responsibility. It was also revealed that teachers led in all four zones (Grant, 2017b), however participants were not active in all the roles. High participation was noticed in zone one, within the classroom; zone two, leading in curricular and extra-curricular activities and zone four, leading beyond the school into the community. This study explored teacher leadership development and at length identified the conditions that constrained and enabled teachers to develop as leaders in a secondary school. The factors that constrained teacher leadership in the case study school were: lack of time, demanding workloads and other commitments, lack of interest in extramural activities and SMT support for initiatives. Fear and unwillingness to take on leadership roles, narrow views on leadership and ingrained traditional leadership structures, limited leadership capacity building initiatives and the absence of clear educational policies on teacher leadership were also identified. The high involvement in zone one, two and four were attributed to some mechanisms the school put in place to promote teacher leadership, such as through various committees set-up, as well as a culture of mutual care and love. During the change laboratory workshops, teachers opted to be trained in leadership-related matters and to revive the CPD committee.
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- Authors: Shilongo, Justina
- Date: 2020
- Subjects: Educational leadership -- Namibia , Educational leadership -- Namibia -- Case studies , Education -- Namibia
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/144923 , vital:38392
- Description: Historically the education system in Namibia was shaped by the policies of the apartheid ideology (Amukugo, 1993). During that time, authority and responsibility were centralised and teachers were not part of the decision making process. By then, most people expected to be told what to do and would not initiate something on their own, a culture inherited that even exists today. In addition, opportunities were not given to teachers to develop as leaders. While Namibians have this history on record, the fact remains that the way in which apartheid laws were put in place, the ideological basis of the policy of apartheid and its impact, was not supportive of the ideas of democracy that Namibia is advocating for today. Despite a number of series of policy guidelines and directives issued to guide the development of a democratic culture in the education sector, less is happening about the leadership of teachers in schools. This stimulated me to conduct an activity theoretical interventionist research, aimed at exploring what opportunities there are for teachers to develop as leaders. This study is a case study, operating from a generative standpoint. The study was conducted in a semi-urban secondary school in Windhoek, Khomas Region, Namibia. The study took a formative intervention approach as it sought to bring about change to practice in the case study school and also to contribute to a body of knowledge in the field of study. This qualitative study employed interviews, observations, document analysis and WhatsApp messaging as data generation tools. Crystallised data revealed multiple realities that demonstrated meaningful and trustworthy data. To analyse data the study employed inductive and abductive analysis to make data meaningful to the reader. Thus, to explore teacher leadership development in a semi-urban secondary school, Change Laboratories Workshops was used as a method to gather and analyse data, as underpinned by 2nd generation CHAT. Grant’s (2017) model of teacher leadership was also used to analyse the data and indicate where teacher leadership roles were mostly visible from all four zones. The findings revealed that there were different understandings of the notion of teacher leadership. It was understood as the possession of certain qualities, a managerial role, an involvement in the decision-making process and a form of social responsibility. It was also revealed that teachers led in all four zones (Grant, 2017b), however participants were not active in all the roles. High participation was noticed in zone one, within the classroom; zone two, leading in curricular and extra-curricular activities and zone four, leading beyond the school into the community. This study explored teacher leadership development and at length identified the conditions that constrained and enabled teachers to develop as leaders in a secondary school. The factors that constrained teacher leadership in the case study school were: lack of time, demanding workloads and other commitments, lack of interest in extramural activities and SMT support for initiatives. Fear and unwillingness to take on leadership roles, narrow views on leadership and ingrained traditional leadership structures, limited leadership capacity building initiatives and the absence of clear educational policies on teacher leadership were also identified. The high involvement in zone one, two and four were attributed to some mechanisms the school put in place to promote teacher leadership, such as through various committees set-up, as well as a culture of mutual care and love. During the change laboratory workshops, teachers opted to be trained in leadership-related matters and to revive the CPD committee.
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The digital and the hyperreal, with reference to artwork by Signe Pierce and Lauren King
- Authors: King, Lauren Pascal
- Date: 2020
- Subjects: Women in art , Femininity in art , Figurative art , Cyberspace -- Social aspects , Feminine beauty (Aesthetics) , Online identities , Photo-realism , Computer art , Virtual reality in art , Reality in art , Art, Modern -- 21st century , Feminist art criticism , Pierce, Signe
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: http://hdl.handle.net/10962/147939 , vital:38688
- Description: This MFA is a visual art critical investigation of digital representations, manipulations, and exploitations of feminine figures in cyberspace. The particular focus of this study is centred on the work of self-titled reality artist Signe Pierce, as well as my own practical body of work: The Digital Feminine. Case studies of Pierce’s practice include Big Sister (2016), Halo (2018), American Reflexxx (2013) and Reality Hack (2016). Through these case studies I examine the nature of identity formation online as underscored by notions of performativity as well as arguments for the use of feminine aesthetics as feminist critique, specifically through the use of the ‘Venus Flytrapping’ method. Jean Baudrillard famously theorised the hyperreal and the simulacra, claiming that human experience is a simulation of reality1. My MFA thesis addresses contemporary concerns relating to issues of reality, perception, the gaze, and identity in an increasingly virtual world. The 20th century witnessed massive changes in technology, and its subsequent commercialisation marked new territories for mass media, politics, entertainment, social life, and the art world. Avant-garde modern art movements shattered previously held standards of traditional artistic production, thus ideas surrounding the ‘art object’ and the role of artists themselves were fundamentally changed. In a postmodern world where nothing is sacred and life is experienced through the simulacra of the screen, the hyperreal takes over. I investigate how real-world socio-political issues, particularly those related to gender, transcend into the digital realm of cyberspace through discussions of Donna Harraway’s ‘cyborg feminism’ and Judith Butler’s ideas of gender performativity, as well as Erving Goffman’s ideas of everyday performativity. My final body of work for the professional art practice component of this MFA is realised in the form of an immersive installation that straddles the virtual and the real. Influenced by digital and hyperreal aesthetics (such as VapourWave), this installation also explores various expressions of femininity that an individual can express both online and in real life.
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- Authors: King, Lauren Pascal
- Date: 2020
- Subjects: Women in art , Femininity in art , Figurative art , Cyberspace -- Social aspects , Feminine beauty (Aesthetics) , Online identities , Photo-realism , Computer art , Virtual reality in art , Reality in art , Art, Modern -- 21st century , Feminist art criticism , Pierce, Signe
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: http://hdl.handle.net/10962/147939 , vital:38688
- Description: This MFA is a visual art critical investigation of digital representations, manipulations, and exploitations of feminine figures in cyberspace. The particular focus of this study is centred on the work of self-titled reality artist Signe Pierce, as well as my own practical body of work: The Digital Feminine. Case studies of Pierce’s practice include Big Sister (2016), Halo (2018), American Reflexxx (2013) and Reality Hack (2016). Through these case studies I examine the nature of identity formation online as underscored by notions of performativity as well as arguments for the use of feminine aesthetics as feminist critique, specifically through the use of the ‘Venus Flytrapping’ method. Jean Baudrillard famously theorised the hyperreal and the simulacra, claiming that human experience is a simulation of reality1. My MFA thesis addresses contemporary concerns relating to issues of reality, perception, the gaze, and identity in an increasingly virtual world. The 20th century witnessed massive changes in technology, and its subsequent commercialisation marked new territories for mass media, politics, entertainment, social life, and the art world. Avant-garde modern art movements shattered previously held standards of traditional artistic production, thus ideas surrounding the ‘art object’ and the role of artists themselves were fundamentally changed. In a postmodern world where nothing is sacred and life is experienced through the simulacra of the screen, the hyperreal takes over. I investigate how real-world socio-political issues, particularly those related to gender, transcend into the digital realm of cyberspace through discussions of Donna Harraway’s ‘cyborg feminism’ and Judith Butler’s ideas of gender performativity, as well as Erving Goffman’s ideas of everyday performativity. My final body of work for the professional art practice component of this MFA is realised in the form of an immersive installation that straddles the virtual and the real. Influenced by digital and hyperreal aesthetics (such as VapourWave), this installation also explores various expressions of femininity that an individual can express both online and in real life.
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The digital rhetoric of addressing rape culture: “official” and “unofficial” arguments at Rhodes University
- Authors: Jones, Megaera
- Date: 2020
- Subjects: Rape in universities and colleges -- South Africa -- Makhanda , Universities and colleges -- Administration -- South Africa -- Makhanda , Communication in higher education - South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/142621 , vital:38096
- Description: South Africa is overwhelmed with high levels of sexual violence and institutions of higher education in South Africa are not exempt from this. How higher education stakeholders have responded to the call to address rape culture on campuses has been at the centre of much attention, especially publicly on online communicative spaces. Drawing on contemporary rhetorical theories, informed by a feminist poststructuralist perspective, this study sought to explore how constituents at Rhodes University were discussing how rape culture should (and should not be) addressed on campus. Using a rhetorical analysis, this study collected and analysed online public data from ‘official’ (institutionally sanctioned) and ‘unofficial’ (institutionally independent) communication platforms, following the 2016 rape culture student-led protest at Rhodes University. In analysing and interpreting the data from the ‘official’ sites, four major themes of discussion were evident. These rhetors argued that rape culture is a societal issue, requiring collective responsibility and effort in countering it, and that any approach to do so must abide by the bounds of the law. The University’s commitment, and continued investment to address rape culture on campus were repeatedly stated; as well as, the use of external ‘supportive’ messages that bolstered the reputation, efforts, and actions of the institution. On the ‘unofficial’ sites six broad patterns of discussion were evident. These ‘unofficial’ rhetors embodied the rape culture on campus, perceiving its effects as threatening to the physical body, which led to the adoption of the argument that rape culture needs to be ‘fought’ through physical action and support. Narrow law and order approaches were contested, and the need for a victim-centred approaches were prioritised. Additionally, doubt and suspicion were cast onto the institutional management/leadership, and the University (management/leadership body) were perceived as having ‘failed’ to address rape culture adequality. Considering this ‘failure’, a divisive rhetoric argued that the ‘fight’ against rape culture should continue, despite, and separate from, the institutional body. These findings revealed how the divisive positions these various stakeholders took created a volatile climate between University management/leadership, staff, and student. I argue that such division will continue to undermine any meaningful efforts to counter rape culture on the University campus; underscoring the difficulty, and ambiguity, that comes with attempting to address rape culture on higher education campuses. This necessitates how important it will be for scholars to research, and continue researching, the ways in which a rape culture, and the various approaches which attempt to counter it, are understood.
- Full Text:
- Authors: Jones, Megaera
- Date: 2020
- Subjects: Rape in universities and colleges -- South Africa -- Makhanda , Universities and colleges -- Administration -- South Africa -- Makhanda , Communication in higher education - South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/142621 , vital:38096
- Description: South Africa is overwhelmed with high levels of sexual violence and institutions of higher education in South Africa are not exempt from this. How higher education stakeholders have responded to the call to address rape culture on campuses has been at the centre of much attention, especially publicly on online communicative spaces. Drawing on contemporary rhetorical theories, informed by a feminist poststructuralist perspective, this study sought to explore how constituents at Rhodes University were discussing how rape culture should (and should not be) addressed on campus. Using a rhetorical analysis, this study collected and analysed online public data from ‘official’ (institutionally sanctioned) and ‘unofficial’ (institutionally independent) communication platforms, following the 2016 rape culture student-led protest at Rhodes University. In analysing and interpreting the data from the ‘official’ sites, four major themes of discussion were evident. These rhetors argued that rape culture is a societal issue, requiring collective responsibility and effort in countering it, and that any approach to do so must abide by the bounds of the law. The University’s commitment, and continued investment to address rape culture on campus were repeatedly stated; as well as, the use of external ‘supportive’ messages that bolstered the reputation, efforts, and actions of the institution. On the ‘unofficial’ sites six broad patterns of discussion were evident. These ‘unofficial’ rhetors embodied the rape culture on campus, perceiving its effects as threatening to the physical body, which led to the adoption of the argument that rape culture needs to be ‘fought’ through physical action and support. Narrow law and order approaches were contested, and the need for a victim-centred approaches were prioritised. Additionally, doubt and suspicion were cast onto the institutional management/leadership, and the University (management/leadership body) were perceived as having ‘failed’ to address rape culture adequality. Considering this ‘failure’, a divisive rhetoric argued that the ‘fight’ against rape culture should continue, despite, and separate from, the institutional body. These findings revealed how the divisive positions these various stakeholders took created a volatile climate between University management/leadership, staff, and student. I argue that such division will continue to undermine any meaningful efforts to counter rape culture on the University campus; underscoring the difficulty, and ambiguity, that comes with attempting to address rape culture on higher education campuses. This necessitates how important it will be for scholars to research, and continue researching, the ways in which a rape culture, and the various approaches which attempt to counter it, are understood.
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The effect of age and maturation on anthropometric characteristics and physical abilities of youth South African footballers
- Authors: De Beer, Ashley
- Date: 2020
- Subjects: Soccer -- Physiologial aspects , Soccer players -- South Africa -- Makhanda -- Physiology , Soccer players -- South Africa -- Makhanda -- Psychophysiology , Makana Local Football Association (South Africa)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/141222 , vital:37954
- Description: Currently there is limited research investigating the football related abilities of youth South African individuals. Populations from North and South America, Europe and Asia have been extensively covered in terms of their anthropometric characteristics, physical abilities, technical competency, tactical understanding as well as various personality traits. In describing these details, and especially how each is affected during the ageing and pubertal process, a more informed understanding of the talent development systems is created. A holistic approach to talent development is required to effectively and efficiently produce elite level footballers. An important consideration is the unique socio-economic environment many youth footballers experience which may impact on the talent development process. The present study therefore sought to quantify the anthropometric characteristics and the physical ability level of youth South African footballers from Local Football Association in Makhanda in the Sarah Baartman Region of the Eastern Cape province. In order to achieve this a two-factorial design was used with age and maturity status as independent variables. Anthropometric characteristics were tested by finding the height, weight, body mass index and total fat percentage of participants. Physical ability was determined by results for aerobic capacity, power, acceleration, speed and agility. All tests were football specific and had been widely used in a variety of footballing studies. Additional demographic and socio-economic information was also recorded. A total of 136 participants were placed in their respective Under 11, 13, 15 or Under 19 age groups, while the maturity status of 96 participants were stratified into five distinct categories. Statistical analyses was conducted using p-value significance, with appropriate Tukey post-hoc tests administered when necessary, while effect sizes were calculated using Cohen’s d. Significant changes and practical effect sizes were present for nearly all dependent variables when either stratified by age or by maturity. Total fat percentage was the only dependent variable which was not influenced by either age or maturity. Age and maturity effect sizes for total body fat percentage indicated practical changes present which did not occur during statistical analysis. The present results indicate poor values when compared to normative data or that of other football playing study populations. Further longitudinal research is required to better understand individual growth rates for youth South African footballers, particularly from the Makana region. Implications of the thesis may determine long term development pathways, while the delayed maturity rate is a critical finding which needs to be further researched.
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- Authors: De Beer, Ashley
- Date: 2020
- Subjects: Soccer -- Physiologial aspects , Soccer players -- South Africa -- Makhanda -- Physiology , Soccer players -- South Africa -- Makhanda -- Psychophysiology , Makana Local Football Association (South Africa)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/141222 , vital:37954
- Description: Currently there is limited research investigating the football related abilities of youth South African individuals. Populations from North and South America, Europe and Asia have been extensively covered in terms of their anthropometric characteristics, physical abilities, technical competency, tactical understanding as well as various personality traits. In describing these details, and especially how each is affected during the ageing and pubertal process, a more informed understanding of the talent development systems is created. A holistic approach to talent development is required to effectively and efficiently produce elite level footballers. An important consideration is the unique socio-economic environment many youth footballers experience which may impact on the talent development process. The present study therefore sought to quantify the anthropometric characteristics and the physical ability level of youth South African footballers from Local Football Association in Makhanda in the Sarah Baartman Region of the Eastern Cape province. In order to achieve this a two-factorial design was used with age and maturity status as independent variables. Anthropometric characteristics were tested by finding the height, weight, body mass index and total fat percentage of participants. Physical ability was determined by results for aerobic capacity, power, acceleration, speed and agility. All tests were football specific and had been widely used in a variety of footballing studies. Additional demographic and socio-economic information was also recorded. A total of 136 participants were placed in their respective Under 11, 13, 15 or Under 19 age groups, while the maturity status of 96 participants were stratified into five distinct categories. Statistical analyses was conducted using p-value significance, with appropriate Tukey post-hoc tests administered when necessary, while effect sizes were calculated using Cohen’s d. Significant changes and practical effect sizes were present for nearly all dependent variables when either stratified by age or by maturity. Total fat percentage was the only dependent variable which was not influenced by either age or maturity. Age and maturity effect sizes for total body fat percentage indicated practical changes present which did not occur during statistical analysis. The present results indicate poor values when compared to normative data or that of other football playing study populations. Further longitudinal research is required to better understand individual growth rates for youth South African footballers, particularly from the Makana region. Implications of the thesis may determine long term development pathways, while the delayed maturity rate is a critical finding which needs to be further researched.
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