Reimagining constructions of gender dysphoria: a dual systematic review using analytical psychology’s concept of individuation
- Authors: Couch, Matthew
- Date: 2019
- Subjects: Gender identity disorders , Gender identity , Individuation (Psychology)
- Language: English
- Type: text , Thesis , Masters , MScoSc
- Identifier: http://hdl.handle.net/10962/95184 , vital:31125
- Description: The process of conceptualization has long served to capture and represent our perceptions of the social world. Conceptual categories help to make sense of subjective experiences, and through discursive practices may come to construct conventional frameworks of knowledge. Consequently, frameworks operating as natural and immutable run the risk of ignoring the dynamic and diverse experiences of many individuals. Today, conceptual frameworks for gender identity are found as inadequately representing progressive social views on the existence of gender identities manifesting outside of the prevailing male-female binary. Within this space of conceptual contention, the diagnostic category of gender dysphoria has received considerable inspection and critique. In particular, it has been criticised as fundamentally controversial by classifying issues of identity within a clinical framework and, consequently, as contributing to the pathologization of all gender diverse individuals. Thus, efforts to reconceptualise and reimagine gender dysphoria may be found. In this research the concept of individuation, as understood within a framework of analytical psychology, is discussed as a potential consideration in reimagining the concept of gender dysphoria. An overarching framework of social constructionism was adopted within this research in examining how constructions of conventional knowledge come about through regulatory discursive and performative practices. The theoretical orientation of analytical psychology was used to frame the concept of individuation and its application to gender dysphoria. This perspective consulted queer theory as a further critical orientation toward the construction of gender identity. The chosen methodology took form as a dual systematic review using critical interpretive synthesis (CIS) to construct representative frameworks. Psychological literature on gender dysphoria (review 1) and individuation (review 2) was reviewed and synthesised. Review 1 identified conceptual inferences within the literature and assessed their role toward problematic gender discourse, while review 2 served as a contributory tool to critically assess whether the conceptual space was accommodating of the concept of individuation. Findings in review 1 identified contemporary gender dysphoria literature as reinforcing of problematic gender discourse. The prevailing clinical framework on gender dysphoria and gender nonconformity was iterated through conceptual constructs emphasising an experience of pathological distress or life dissatisfaction. As such, a cyclical pathologization of gender diversity is reconstructed through current representations within the literature. However, it was deduced that there are signs of resistance in the literature to the clinical model which challenge and counter the impact of problematic gender discourse. In review 2, individuation was framed by the literature as an intrapsychic facilitator supporting the integration of all aspects particular to the individual personality so that conscious identity becomes congruent with internal nature. Resultantly, one may experience psychosocial maturation and contribute to collective societal progression. For some, individuation prompts a differentiation from collective expectations in integrating one‘s inherent nature into expressed identity. Thus, gender nonconformity may be viewed as an expression of this differentiation when individuation drives the realization of this feature to be intrinsic and natural for the individual. Individuation was determined as incompatible with the category of gender dysphoria, but of value within the conceptual space where efforts to reimagine gender dysphoria are in place.
- Full Text:
- Authors: Couch, Matthew
- Date: 2019
- Subjects: Gender identity disorders , Gender identity , Individuation (Psychology)
- Language: English
- Type: text , Thesis , Masters , MScoSc
- Identifier: http://hdl.handle.net/10962/95184 , vital:31125
- Description: The process of conceptualization has long served to capture and represent our perceptions of the social world. Conceptual categories help to make sense of subjective experiences, and through discursive practices may come to construct conventional frameworks of knowledge. Consequently, frameworks operating as natural and immutable run the risk of ignoring the dynamic and diverse experiences of many individuals. Today, conceptual frameworks for gender identity are found as inadequately representing progressive social views on the existence of gender identities manifesting outside of the prevailing male-female binary. Within this space of conceptual contention, the diagnostic category of gender dysphoria has received considerable inspection and critique. In particular, it has been criticised as fundamentally controversial by classifying issues of identity within a clinical framework and, consequently, as contributing to the pathologization of all gender diverse individuals. Thus, efforts to reconceptualise and reimagine gender dysphoria may be found. In this research the concept of individuation, as understood within a framework of analytical psychology, is discussed as a potential consideration in reimagining the concept of gender dysphoria. An overarching framework of social constructionism was adopted within this research in examining how constructions of conventional knowledge come about through regulatory discursive and performative practices. The theoretical orientation of analytical psychology was used to frame the concept of individuation and its application to gender dysphoria. This perspective consulted queer theory as a further critical orientation toward the construction of gender identity. The chosen methodology took form as a dual systematic review using critical interpretive synthesis (CIS) to construct representative frameworks. Psychological literature on gender dysphoria (review 1) and individuation (review 2) was reviewed and synthesised. Review 1 identified conceptual inferences within the literature and assessed their role toward problematic gender discourse, while review 2 served as a contributory tool to critically assess whether the conceptual space was accommodating of the concept of individuation. Findings in review 1 identified contemporary gender dysphoria literature as reinforcing of problematic gender discourse. The prevailing clinical framework on gender dysphoria and gender nonconformity was iterated through conceptual constructs emphasising an experience of pathological distress or life dissatisfaction. As such, a cyclical pathologization of gender diversity is reconstructed through current representations within the literature. However, it was deduced that there are signs of resistance in the literature to the clinical model which challenge and counter the impact of problematic gender discourse. In review 2, individuation was framed by the literature as an intrapsychic facilitator supporting the integration of all aspects particular to the individual personality so that conscious identity becomes congruent with internal nature. Resultantly, one may experience psychosocial maturation and contribute to collective societal progression. For some, individuation prompts a differentiation from collective expectations in integrating one‘s inherent nature into expressed identity. Thus, gender nonconformity may be viewed as an expression of this differentiation when individuation drives the realization of this feature to be intrinsic and natural for the individual. Individuation was determined as incompatible with the category of gender dysphoria, but of value within the conceptual space where efforts to reimagine gender dysphoria are in place.
- Full Text:
Religious pluralism: an analysis of its practice and effect in four historical examples
- Authors: Groves, Samuel Peter
- Date: 2019
- Subjects: Religious pluralism , Christianity and other religions , Freedom of religion -- History , Alexandria (Egypt) -- History , Athens (Greece) -- History , Alexandria (Egypt) -- Religion , Athens (Greece) -- Religion , Eusebius, of Caesarea, Bishop of Caesarea, approximately 260-approximately 340 , Constantine I, Emperor of Rome, -337 , Constantine I, Emperor of Rome, -337 -- Religion , Rome -- History -- Constantine I, the Great, 306-337 , Rome -- Religion , Jews -- Spain -- History -- Expulsion, 1492 , Spain -- History -- Ferdinand and Isabella, 1479-1516 , Spain -- Religion
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/67709 , vital:29132
- Description: Despite the fact that religious freedom is considered a basic human right, provided for in the South African constitution, the practise of religious freedom is often denied in certain countries and discouraged in others. The goal of this thesis is to examine four historical examples in which religious freedom was practised or denied, and the effect this decision had on the countries or people concerned. The first example of Alexander's empire is a positive example of religious liberty. His practise of religious pluralism offered peace to the Greeks and Jews of Alexandria, and it prompted creative and intellectual pursuits that would have been impossible without religious freedom. The second example is of Paul the Apostle's approach to positive religious engagement, as recorded in Acts 17 of the New Testament. Paul models constructive religious debate as he engages with the Athenian philosophers. The third example is of Constantine's pursuit of unity through religious prescription. In his bid for one empire under one God, he created both a divided empire and a divided church. The final example is of the Catholic Monarchs of Spain, who through the persecution of Jews and Muslims, caused the economic collapse of Spain and the division of the church within Spain. This thesis provides historical evidence that religious pluralism benefits humanity and it is my hope that it will encourage religious and political leaders to uphold religious pluralism for the good of society and for the good of religion.
- Full Text:
- Authors: Groves, Samuel Peter
- Date: 2019
- Subjects: Religious pluralism , Christianity and other religions , Freedom of religion -- History , Alexandria (Egypt) -- History , Athens (Greece) -- History , Alexandria (Egypt) -- Religion , Athens (Greece) -- Religion , Eusebius, of Caesarea, Bishop of Caesarea, approximately 260-approximately 340 , Constantine I, Emperor of Rome, -337 , Constantine I, Emperor of Rome, -337 -- Religion , Rome -- History -- Constantine I, the Great, 306-337 , Rome -- Religion , Jews -- Spain -- History -- Expulsion, 1492 , Spain -- History -- Ferdinand and Isabella, 1479-1516 , Spain -- Religion
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/67709 , vital:29132
- Description: Despite the fact that religious freedom is considered a basic human right, provided for in the South African constitution, the practise of religious freedom is often denied in certain countries and discouraged in others. The goal of this thesis is to examine four historical examples in which religious freedom was practised or denied, and the effect this decision had on the countries or people concerned. The first example of Alexander's empire is a positive example of religious liberty. His practise of religious pluralism offered peace to the Greeks and Jews of Alexandria, and it prompted creative and intellectual pursuits that would have been impossible without religious freedom. The second example is of Paul the Apostle's approach to positive religious engagement, as recorded in Acts 17 of the New Testament. Paul models constructive religious debate as he engages with the Athenian philosophers. The third example is of Constantine's pursuit of unity through religious prescription. In his bid for one empire under one God, he created both a divided empire and a divided church. The final example is of the Catholic Monarchs of Spain, who through the persecution of Jews and Muslims, caused the economic collapse of Spain and the division of the church within Spain. This thesis provides historical evidence that religious pluralism benefits humanity and it is my hope that it will encourage religious and political leaders to uphold religious pluralism for the good of society and for the good of religion.
- Full Text:
Remedies, repentance and the doctrine of election in South African contract law
- Authors: Glover, Graham B
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/186712 , vital:44527 , xlink:href="https://hdl.handle.net/10520/EJC-1a756528b2"
- Description: One of the main features of South Africa’s law on remedies for breach of contract is the doctrine of election. In cases where a major breach has occurred, or a cancellation clause entitles the aggrieved party to seek cancellation, the aggrieved party has an election either to cancel or to claim performance, and will be held to that binary choice. In Primat Construction CC v Nelson Mandela Bay Metropolitan Municipality the Supreme Court of Appeal recently recognised an exception to the usual election rule, specifically in cases involving repudiation. In terms of the ‘repentance principle’, a party who experiences repudiation may initially seek performance in the hope that the breaching party will repent of their breach; but if it does not, the aggrieved party may then change its mind and seek cancellation. This essay considers the history of the doctrine of election and the path to the recognition of its qualifier, the repentance principle. Thereafter, the essay poses the question whether it remains desirable for the strict doctrine of election to continue to apply in South African law, bearing in mind that a strict election can have an unduly constraining effect on the interests of the non-breaching (or ‘innocent’) party. This analysis is informed by the broader policy considerations behind the recognition of the repentance principle; the fact that other analogous exceptions to the election rule do exist; and the fact that other jurisdictions do not adopt such a strict approach to the aggrieved party’s choice of remedy.
- Full Text:
- Authors: Glover, Graham B
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/186712 , vital:44527 , xlink:href="https://hdl.handle.net/10520/EJC-1a756528b2"
- Description: One of the main features of South Africa’s law on remedies for breach of contract is the doctrine of election. In cases where a major breach has occurred, or a cancellation clause entitles the aggrieved party to seek cancellation, the aggrieved party has an election either to cancel or to claim performance, and will be held to that binary choice. In Primat Construction CC v Nelson Mandela Bay Metropolitan Municipality the Supreme Court of Appeal recently recognised an exception to the usual election rule, specifically in cases involving repudiation. In terms of the ‘repentance principle’, a party who experiences repudiation may initially seek performance in the hope that the breaching party will repent of their breach; but if it does not, the aggrieved party may then change its mind and seek cancellation. This essay considers the history of the doctrine of election and the path to the recognition of its qualifier, the repentance principle. Thereafter, the essay poses the question whether it remains desirable for the strict doctrine of election to continue to apply in South African law, bearing in mind that a strict election can have an unduly constraining effect on the interests of the non-breaching (or ‘innocent’) party. This analysis is informed by the broader policy considerations behind the recognition of the repentance principle; the fact that other analogous exceptions to the election rule do exist; and the fact that other jurisdictions do not adopt such a strict approach to the aggrieved party’s choice of remedy.
- Full Text:
Repatriating Xhosa music recordings archived at the International Library of African Music (ILAM) and reviving interest in traditional Xhosa music among the youth in Grahamstown
- Authors: Madiba, Elijah Moleseng
- Date: 2019
- Subjects: International Library of African Music , Xhosa (African people) -- Music , Sound recordings in ethnomusicology -- South Africa , Ethnomusicology -- South Africa -- Makhanda , Cultural property -- Repatriation -- South Africa -- Makhanda , Rap musicians -- South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: http://hdl.handle.net/10962/76599 , vital:30611
- Description: This research looks at the feasibility of using repatriation as a tool for the revitalisation of indigenous music within a contemporary South African musical context. Using tracks from the International Library of African Music (ILAM), this investigation presents isiXhosa traditional and indigenous music to a group of musicians from a hip-hop background that would never have had access to this type of music before. The thesis then traces their creative use of the music within their own genres. Speaking to the legacy of the Hugh Tracey collection at ILAM and criticisms that have surfaced, this research also attempts to validate the efforts made by Hugh Tracey in collecting and documenting African music. Themes ranging from understanding the term “tradition” are addressed, as well as other technical terms in the vernacular while also exploring and analysing the results of the repatriation project. Practical issues regarding the sampling of indigenous music were interrogated carefully due to the fact that the complexity of African music was foreign to most of the participants. Their familiarity with the music, or lack thereof, either motivated or ended the musicians’ participation in the research project. An in-depth analysis of the results of the musicians’ interaction with the music is presented where this study finds, at the heart of this research, that the musicians performed as agents who easily took to revitalising the music.
- Full Text:
- Authors: Madiba, Elijah Moleseng
- Date: 2019
- Subjects: International Library of African Music , Xhosa (African people) -- Music , Sound recordings in ethnomusicology -- South Africa , Ethnomusicology -- South Africa -- Makhanda , Cultural property -- Repatriation -- South Africa -- Makhanda , Rap musicians -- South Africa -- Makhanda
- Language: English
- Type: text , Thesis , Masters , MMus
- Identifier: http://hdl.handle.net/10962/76599 , vital:30611
- Description: This research looks at the feasibility of using repatriation as a tool for the revitalisation of indigenous music within a contemporary South African musical context. Using tracks from the International Library of African Music (ILAM), this investigation presents isiXhosa traditional and indigenous music to a group of musicians from a hip-hop background that would never have had access to this type of music before. The thesis then traces their creative use of the music within their own genres. Speaking to the legacy of the Hugh Tracey collection at ILAM and criticisms that have surfaced, this research also attempts to validate the efforts made by Hugh Tracey in collecting and documenting African music. Themes ranging from understanding the term “tradition” are addressed, as well as other technical terms in the vernacular while also exploring and analysing the results of the repatriation project. Practical issues regarding the sampling of indigenous music were interrogated carefully due to the fact that the complexity of African music was foreign to most of the participants. Their familiarity with the music, or lack thereof, either motivated or ended the musicians’ participation in the research project. An in-depth analysis of the results of the musicians’ interaction with the music is presented where this study finds, at the heart of this research, that the musicians performed as agents who easily took to revitalising the music.
- Full Text:
Reproductive isolation mechanisms of two cryptic species of Eccritotarsus (Hemiptera: Miridae), biological control agents of water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae)
- Authors: Mnguni, Sandiso
- Date: 2019
- Subjects: Eccritotarsus , Meridae , Noxious weeds -- Biological control -- South Africa , Aquatic weeds -- Biological control -- South Africa , Water hyacinth -- Biological control -- South Africa , Biological pest control agents
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/68133 , vital:29202
- Description: Water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae), is one of the world’s worst alien invasive plants. It is indigenous to the Amazon basin in South America but has become a problematic alien invasive in other parts of the world. As such, several host-specific biological control agents have been sourced from the native distributions in South America and have been released to control this plant where it has become problematic. Two of these agents include the geographically and reproductively isolated cryptic species of Eccritotarsus (Hemiptera: Miridae). One of these species was collected in the upper reaches of the Amazon River in Peru, while the other was collected over 3500km away from that site, in Florianopolis, southern Brazil. These cryptic species were thought to be a single species until recently, when DNA barcoding indicated that they were likely to be two species, and the species status has now been confirmed by interbreeding experiments and detailed morphological studies. The Brazilian population remains Eccritotarsus catarinensis (Carvalho), while the Peruvian population is now known as Eccritotarsus eichhorniae (Henry). The aim of this project was to investigate the mating behaviour and other behavioural traits of the two species that have resulted in reproductive isolation, and which could have led to speciation. In addition, investigations involving analysis of chemical compound compositions of the two species aimed to determine the extent to which the compounds played a role in the development and maintenance of reproductive isolation. To achieve the aims, behavioural-observation experiments were conducted in the form of no-choice, bi-choice and multi-choice tests in 1:1, 2:1 and 3:1 sex ratio assessments, both within and between species. Chemical compound compositions of E. catarinensis and E. eichhorniae were also assessed using Nuclear Magnetic Resonance (NMR), Solid-phase micro-extraction (SPME) and Gas-Chromatography Mass-Spectrometry (GC-MS) techniques. In no-choice experiments, the highest number of single and multiple copula incidences, and average total copula duration was found within species while copulation between species was much rarer. In bi-choice experiments, E. eichhorniae females and E. catarinensis males only chose to mate with their respective conspecifics, and within species copulations continued to have higher average total copula duration. In multi-choice experiments, the highest number of single and multiple copula incidences and average total copula duration was also found within species. GC-MS analysis suggested that E. catarinensis females and E. eichhorniae males have unique chemical compounds missing in their conspecifics and same sex of the other species. Further analysis suggested that E. catarinensis females and E. eichhorniae males have similar chemical compound compositions, whereas as E. eichhorniae females and E. catarinensis males have similar chemical compound compositions. These results suggest that there are behavioural differences that led to the development and maintenance of prezygotic reproductive isolation mechanisms, and that this is probably driven by pheromones in chemical compound compositions. These two species were geographically isolated in the native range and the populations have diverged to the point that they are now reproductively incompatible and therefore, distinct species. The main driver of the speciation is most likely mate recognition and attraction, as only reproductively important traits such as pheromones, genitalia, the scent glands and antennae have changed, while other traits, including host range and morphology, have remained remarkably stable. This provides evidence that differences in sexual selection in isolated populations may be important drivers of speciation and reproductive isolation in cryptic species.
- Full Text:
- Authors: Mnguni, Sandiso
- Date: 2019
- Subjects: Eccritotarsus , Meridae , Noxious weeds -- Biological control -- South Africa , Aquatic weeds -- Biological control -- South Africa , Water hyacinth -- Biological control -- South Africa , Biological pest control agents
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/68133 , vital:29202
- Description: Water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae), is one of the world’s worst alien invasive plants. It is indigenous to the Amazon basin in South America but has become a problematic alien invasive in other parts of the world. As such, several host-specific biological control agents have been sourced from the native distributions in South America and have been released to control this plant where it has become problematic. Two of these agents include the geographically and reproductively isolated cryptic species of Eccritotarsus (Hemiptera: Miridae). One of these species was collected in the upper reaches of the Amazon River in Peru, while the other was collected over 3500km away from that site, in Florianopolis, southern Brazil. These cryptic species were thought to be a single species until recently, when DNA barcoding indicated that they were likely to be two species, and the species status has now been confirmed by interbreeding experiments and detailed morphological studies. The Brazilian population remains Eccritotarsus catarinensis (Carvalho), while the Peruvian population is now known as Eccritotarsus eichhorniae (Henry). The aim of this project was to investigate the mating behaviour and other behavioural traits of the two species that have resulted in reproductive isolation, and which could have led to speciation. In addition, investigations involving analysis of chemical compound compositions of the two species aimed to determine the extent to which the compounds played a role in the development and maintenance of reproductive isolation. To achieve the aims, behavioural-observation experiments were conducted in the form of no-choice, bi-choice and multi-choice tests in 1:1, 2:1 and 3:1 sex ratio assessments, both within and between species. Chemical compound compositions of E. catarinensis and E. eichhorniae were also assessed using Nuclear Magnetic Resonance (NMR), Solid-phase micro-extraction (SPME) and Gas-Chromatography Mass-Spectrometry (GC-MS) techniques. In no-choice experiments, the highest number of single and multiple copula incidences, and average total copula duration was found within species while copulation between species was much rarer. In bi-choice experiments, E. eichhorniae females and E. catarinensis males only chose to mate with their respective conspecifics, and within species copulations continued to have higher average total copula duration. In multi-choice experiments, the highest number of single and multiple copula incidences and average total copula duration was also found within species. GC-MS analysis suggested that E. catarinensis females and E. eichhorniae males have unique chemical compounds missing in their conspecifics and same sex of the other species. Further analysis suggested that E. catarinensis females and E. eichhorniae males have similar chemical compound compositions, whereas as E. eichhorniae females and E. catarinensis males have similar chemical compound compositions. These results suggest that there are behavioural differences that led to the development and maintenance of prezygotic reproductive isolation mechanisms, and that this is probably driven by pheromones in chemical compound compositions. These two species were geographically isolated in the native range and the populations have diverged to the point that they are now reproductively incompatible and therefore, distinct species. The main driver of the speciation is most likely mate recognition and attraction, as only reproductively important traits such as pheromones, genitalia, the scent glands and antennae have changed, while other traits, including host range and morphology, have remained remarkably stable. This provides evidence that differences in sexual selection in isolated populations may be important drivers of speciation and reproductive isolation in cryptic species.
- Full Text:
Research for the people, by the people: The political practice of cognitive justice and transformative learning in environmental social movements
- Authors: Burt, Jane C
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/392177 , vital:68728 , xlink:href="https://doi.org/10.3390/su11205611"
- Description: This paper describes how Changing Practice courses, developed by environmental activists in South Africa and based on social learning practice, have seeded cognitive justice action. For the educator-activists who facilitated these courses, it became apparent that we needed a bold emancipatory pedagogy which included cognitive justice issues. This enabled us and the activist-researcher participants to understand the extent to which local, indigenous, and spiritual knowledge had been excluded from water governance. The paper investigates how participants in the ‘Water and Tradition’ change project, established by the Vaal Environmental Justice Alliance (VEJA, engaged with cognitive justice, to demonstrate how African spiritual practice offers a re-visioning of the natural world. Finally, using the tools of critical realist theory, the paper reviews how VEJA bring about transformative social action through their participation in the Changing Practice course.
- Full Text:
- Authors: Burt, Jane C
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/392177 , vital:68728 , xlink:href="https://doi.org/10.3390/su11205611"
- Description: This paper describes how Changing Practice courses, developed by environmental activists in South Africa and based on social learning practice, have seeded cognitive justice action. For the educator-activists who facilitated these courses, it became apparent that we needed a bold emancipatory pedagogy which included cognitive justice issues. This enabled us and the activist-researcher participants to understand the extent to which local, indigenous, and spiritual knowledge had been excluded from water governance. The paper investigates how participants in the ‘Water and Tradition’ change project, established by the Vaal Environmental Justice Alliance (VEJA, engaged with cognitive justice, to demonstrate how African spiritual practice offers a re-visioning of the natural world. Finally, using the tools of critical realist theory, the paper reviews how VEJA bring about transformative social action through their participation in the Changing Practice course.
- Full Text:
Responding to iconic images of risk through reflexive and narrative enquiry represented in a stratified text for environmental education readers
- Authors: Murphy, Mary
- Date: 2019
- Subjects: Sustainability -- Study and teaching , Environmental education -- Philosophy , Environmental degradation -- Study and teaching , Environmental degradation -- Philosophy , Reflection (Philosophy) , Archer, Margaret S (Margaret Scotford). Structure, agency, and the internal conversation
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/96768 , vital:31318
- Description: This thesis presents a stratified textual strategy to represent meaning developed through reflexive and narrative enquiry of environmental risk. Meaning that emerged in responses to iconic images of risk. Umberto Eco cautioned that iconic images over time become conventional taking over from that which they represent. Representations of risk become embedded through cultural coding. Semiotic theory provided access to the contextual and cultural content of environmental education as experienced during professional work as a radio presenter of “Environmental Matters”, as an environmental educator and activist. Methodological rigour was applied through the application of Margaret Archer's theory of the internal conversation and use of an online content management system. Both the reflexive tool of the internal conversation and the textual mechanism of the blog encouraged commitment to Paul Hart's criteria of trustworthiness and authenticity in the process of building the semiotic structure of the PhD. The Internal Conversation was used as a mediating tool in the PhD process and is presented in practice. Rethinking environmental risk from other species' perspectives through imagined experience was achieved through narrative enquiry. A noted anthropocentric limitation of the inability to interview animals for their experience of human-imposed risk was mitigated through representing the imagined, possible perspectives through story, which invites the reader to join the meaning-making process and open up discussions for and about environmental issues and action. This noted anthropocentrism was evident in debates among the characters about violence and non-violence as a conditioned theme and topic discussed in previous academic research about terrorism in divided societies. The story illustrates how the main character, a penguin called Polo, navigates through emerging meaning within a structure that confronts him with choices that end with a decision to become an agent for change. This story is a narrative example of the morphogenetic process. The multi-textual strategy presents possible methods for the exploration of risk (Vol. 1), reflexivity (Vol. 2) and representation (Vol. 3) for the application and contribution in/to environmental education.
- Full Text:
- Authors: Murphy, Mary
- Date: 2019
- Subjects: Sustainability -- Study and teaching , Environmental education -- Philosophy , Environmental degradation -- Study and teaching , Environmental degradation -- Philosophy , Reflection (Philosophy) , Archer, Margaret S (Margaret Scotford). Structure, agency, and the internal conversation
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/96768 , vital:31318
- Description: This thesis presents a stratified textual strategy to represent meaning developed through reflexive and narrative enquiry of environmental risk. Meaning that emerged in responses to iconic images of risk. Umberto Eco cautioned that iconic images over time become conventional taking over from that which they represent. Representations of risk become embedded through cultural coding. Semiotic theory provided access to the contextual and cultural content of environmental education as experienced during professional work as a radio presenter of “Environmental Matters”, as an environmental educator and activist. Methodological rigour was applied through the application of Margaret Archer's theory of the internal conversation and use of an online content management system. Both the reflexive tool of the internal conversation and the textual mechanism of the blog encouraged commitment to Paul Hart's criteria of trustworthiness and authenticity in the process of building the semiotic structure of the PhD. The Internal Conversation was used as a mediating tool in the PhD process and is presented in practice. Rethinking environmental risk from other species' perspectives through imagined experience was achieved through narrative enquiry. A noted anthropocentric limitation of the inability to interview animals for their experience of human-imposed risk was mitigated through representing the imagined, possible perspectives through story, which invites the reader to join the meaning-making process and open up discussions for and about environmental issues and action. This noted anthropocentrism was evident in debates among the characters about violence and non-violence as a conditioned theme and topic discussed in previous academic research about terrorism in divided societies. The story illustrates how the main character, a penguin called Polo, navigates through emerging meaning within a structure that confronts him with choices that end with a decision to become an agent for change. This story is a narrative example of the morphogenetic process. The multi-textual strategy presents possible methods for the exploration of risk (Vol. 1), reflexivity (Vol. 2) and representation (Vol. 3) for the application and contribution in/to environmental education.
- Full Text:
Rethinking ICT4D Impact Assessments: reflections from the Siyakhula Living Lab in South Africa
- Mthoko, Hafeni, Khene, Caroline
- Authors: Mthoko, Hafeni , Khene, Caroline
- Date: 2019
- Language: English
- Type: text , conference paper
- Identifier: http://hdl.handle.net/10962/105286 , vital:32495 , https://doi.org/10.1007/978-3-030-11235-6_4
- Description: The approach to outcome and impact assessments of ICTD has often relied solely on identifying project effects in relation to project baseline data; however, such an approach limits the potential learning that could be occurring throughout a project’s lifecycle. Impact assessments should be conducted in a comprehensive manner, taking into account the evaluation data that has been captured from the initiation of the project through to its implementation, and beyond. This study sought to reflect on the implementation of an impact assessment framework that is based on a comprehensive approach to evaluation. The framework was implemented in the Siyakhula Living Lab to assess for its outcomes and impacts on the community. A pragmatic approach was applied through a reflective process, to assess the utility of the framework within this context. Semi-structured interviews with project stakeholders were conducted to further gain insight into the comprehensive approach to conducting impact assessments. It was found that a comprehensive approach to assessing impacts provided a meaningful way to understand the effects of the ICTD initiative, and provided an overview of project areas that required improvement. However, it was found that the proposed assessment framework required a customisation component in order to modify it to better suit the project context. The way in which future impact assessments are conducted can draw on the lessons gained from following a more comprehensive approach to evaluation, and thus improve learning over time.
- Full Text: false
- Authors: Mthoko, Hafeni , Khene, Caroline
- Date: 2019
- Language: English
- Type: text , conference paper
- Identifier: http://hdl.handle.net/10962/105286 , vital:32495 , https://doi.org/10.1007/978-3-030-11235-6_4
- Description: The approach to outcome and impact assessments of ICTD has often relied solely on identifying project effects in relation to project baseline data; however, such an approach limits the potential learning that could be occurring throughout a project’s lifecycle. Impact assessments should be conducted in a comprehensive manner, taking into account the evaluation data that has been captured from the initiation of the project through to its implementation, and beyond. This study sought to reflect on the implementation of an impact assessment framework that is based on a comprehensive approach to evaluation. The framework was implemented in the Siyakhula Living Lab to assess for its outcomes and impacts on the community. A pragmatic approach was applied through a reflective process, to assess the utility of the framework within this context. Semi-structured interviews with project stakeholders were conducted to further gain insight into the comprehensive approach to conducting impact assessments. It was found that a comprehensive approach to assessing impacts provided a meaningful way to understand the effects of the ICTD initiative, and provided an overview of project areas that required improvement. However, it was found that the proposed assessment framework required a customisation component in order to modify it to better suit the project context. The way in which future impact assessments are conducted can draw on the lessons gained from following a more comprehensive approach to evaluation, and thus improve learning over time.
- Full Text: false
Rethinking the dialectics of rural and urban in African art and scholarship:
- Siegenthaler, Fiona, Nzewi, Ugochukwu-Smooth C, Siegert, Nadine
- Authors: Siegenthaler, Fiona , Nzewi, Ugochukwu-Smooth C , Siegert, Nadine
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146022 , vital:38488 , DOI: 10.1080/19301944.2018.1538856
- Description: This issue of Critical Interventions is dedicated to rethinking the dialectics of the rural and the urban in African art and scholarship. Inspired by the general theme of the European Conference of African Studies (ECAS/AEGIS) in Basel (June 28 to July 1, 2017), Urban Africa – Urban Africans: New Encounters of the Rural and the Urban, the guest editors of this issue hosted two panels on the relationship of urban-based artists and their interest in rural topographies, aesthetics, and cultural practices.
- Full Text:
- Authors: Siegenthaler, Fiona , Nzewi, Ugochukwu-Smooth C , Siegert, Nadine
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146022 , vital:38488 , DOI: 10.1080/19301944.2018.1538856
- Description: This issue of Critical Interventions is dedicated to rethinking the dialectics of the rural and the urban in African art and scholarship. Inspired by the general theme of the European Conference of African Studies (ECAS/AEGIS) in Basel (June 28 to July 1, 2017), Urban Africa – Urban Africans: New Encounters of the Rural and the Urban, the guest editors of this issue hosted two panels on the relationship of urban-based artists and their interest in rural topographies, aesthetics, and cultural practices.
- Full Text:
Rhodes University Calender 2019
- Authors: Rhodes University
- Date: 2019
- Subjects: University Calendar , Rhodes University Regulations , Rhodes University History , Universities and colleges South Africa
- Language: English
- Type: Serial publications , University Calendar , text
- Identifier: http://hdl.handle.net/10962/455145 , vital:75407
- Description: Rhodes University Calendar for the academic year 2019.
- Full Text:
- Authors: Rhodes University
- Date: 2019
- Subjects: University Calendar , Rhodes University Regulations , Rhodes University History , Universities and colleges South Africa
- Language: English
- Type: Serial publications , University Calendar , text
- Identifier: http://hdl.handle.net/10962/455145 , vital:75407
- Description: Rhodes University Calendar for the academic year 2019.
- Full Text:
Rhodes University Research Report 2019: a year in review
- Roberts, Jaine, Macgregor, Jill, Mantolo, Thumeka
- Authors: Roberts, Jaine , Macgregor, Jill , Mantolo, Thumeka
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , report
- Identifier: http://hdl.handle.net/10962/473231 , vital:77621 , ISBN , https://www.ru.ac.za/researchgateway/researchexcellence/annualresearchreports/
- Description: From Foreword by Dr Sizwe Mabizela: The pages of this report outline the strong research trajectory of our institution, and the many facets of our work that give effect to our context, our local and national partnerships, and our collaborations on the African continent and beyond. Rhodes University is very fortunate to have outstanding, dedicated and committed academic and support staff who take a deep and keen interest in the growth, development and academic success of each and every one of our students, as well as in the social and natural environment that surrounds us.
- Full Text:
- Authors: Roberts, Jaine , Macgregor, Jill , Mantolo, Thumeka
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , report
- Identifier: http://hdl.handle.net/10962/473231 , vital:77621 , ISBN , https://www.ru.ac.za/researchgateway/researchexcellence/annualresearchreports/
- Description: From Foreword by Dr Sizwe Mabizela: The pages of this report outline the strong research trajectory of our institution, and the many facets of our work that give effect to our context, our local and national partnerships, and our collaborations on the African continent and beyond. Rhodes University is very fortunate to have outstanding, dedicated and committed academic and support staff who take a deep and keen interest in the growth, development and academic success of each and every one of our students, as well as in the social and natural environment that surrounds us.
- Full Text:
Risk assessment to interpret the physiological host range of Hydrellia egeriae, a biocontrol agent for Egeria densa
- Smith, Rosali, Mangan, Rosie, Coetzee, Julie A
- Authors: Smith, Rosali , Mangan, Rosie , Coetzee, Julie A
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/418053 , vital:71504 , xlink:href="https://doi.org/10.1007/s10526-019-09942-4"
- Description: Egeria densa Planchon (Hydrocharitaceae) is a submerged macrophyte native to South America. It forms part of a new suite of invasive aquatic plants that has benefited from open nutrient-rich freshwater systems following the successful biological control of floating aquatic plants in South Africa. The specificity of the leaf-mining fly, Hydrellia egeriae Rodrigues (Diptera: Ephydridae) was tested, using traditional laboratory host-specificity testing (i.e., no-choice and paired choice). Only one non-target species, Lagarosiphon major Deeming (Hydrocharitaceae) supported larval development during pair-choice tests. In order to avoid the rejection of a safe and potentially effective agent, continuation (i.e., multiple generations) tests were conducted to measure the ability of the non-target species to nutritionally support a population indefinitely. None of these species could sustain a viable agent population for more than three generations. Laboratory host-specificity tests are limited as they exempt certain insect-host behaviours. To enhance the interpretation of host-specificity results, a risk assessment was conducted using agent preference (i.e., choice tests) and performance (i.e., choice and continuation tests) results. The feeding and reproductive risk that H. egeriae poses to non-target species is below 2%. Based on these findings, permission for its release in South Africa has been obtained.
- Full Text:
- Authors: Smith, Rosali , Mangan, Rosie , Coetzee, Julie A
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/418053 , vital:71504 , xlink:href="https://doi.org/10.1007/s10526-019-09942-4"
- Description: Egeria densa Planchon (Hydrocharitaceae) is a submerged macrophyte native to South America. It forms part of a new suite of invasive aquatic plants that has benefited from open nutrient-rich freshwater systems following the successful biological control of floating aquatic plants in South Africa. The specificity of the leaf-mining fly, Hydrellia egeriae Rodrigues (Diptera: Ephydridae) was tested, using traditional laboratory host-specificity testing (i.e., no-choice and paired choice). Only one non-target species, Lagarosiphon major Deeming (Hydrocharitaceae) supported larval development during pair-choice tests. In order to avoid the rejection of a safe and potentially effective agent, continuation (i.e., multiple generations) tests were conducted to measure the ability of the non-target species to nutritionally support a population indefinitely. None of these species could sustain a viable agent population for more than three generations. Laboratory host-specificity tests are limited as they exempt certain insect-host behaviours. To enhance the interpretation of host-specificity results, a risk assessment was conducted using agent preference (i.e., choice tests) and performance (i.e., choice and continuation tests) results. The feeding and reproductive risk that H. egeriae poses to non-target species is below 2%. Based on these findings, permission for its release in South Africa has been obtained.
- Full Text:
River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication
- Dalu, Tatenda, Wasserman, Ryan J, Magoro, Mandla L, Froneman, P William, Weyl, Olaf, L F
- Authors: Dalu, Tatenda , Wasserman, Ryan J , Magoro, Mandla L , Froneman, P William , Weyl, Olaf, L F
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/467222 , vital:76841 , https://doi.org/10.1016/j.scitotenv.2019.05.167
- Description: The consideration of nutrients in pollution dynamics is important for environmental management and conservation. Developing countries are yet to appreciate the aquatic ecosystem pollution impacts on their economies and as such, information on water pollution dynamics is limited. This study assessed the spatio-temporal dynamics of nutrient loading and retention in stream water and sediments in the Bloukrans River system, Eastern Cape province, South Africa over the course of the wet and dry season. Sediment and water samples were analysed for total phosphorus (TP) and nitrogen (TN) concentrations, and were used in combination with river flow discharge, to determine nutrient loads. The study results highlight that river discharge plays a significant role in temporal differences in sediment and water column nutrient concentrations.
- Full Text:
- Authors: Dalu, Tatenda , Wasserman, Ryan J , Magoro, Mandla L , Froneman, P William , Weyl, Olaf, L F
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/467222 , vital:76841 , https://doi.org/10.1016/j.scitotenv.2019.05.167
- Description: The consideration of nutrients in pollution dynamics is important for environmental management and conservation. Developing countries are yet to appreciate the aquatic ecosystem pollution impacts on their economies and as such, information on water pollution dynamics is limited. This study assessed the spatio-temporal dynamics of nutrient loading and retention in stream water and sediments in the Bloukrans River system, Eastern Cape province, South Africa over the course of the wet and dry season. Sediment and water samples were analysed for total phosphorus (TP) and nitrogen (TN) concentrations, and were used in combination with river flow discharge, to determine nutrient loads. The study results highlight that river discharge plays a significant role in temporal differences in sediment and water column nutrient concentrations.
- Full Text:
Rural food security in Mutare District, Zimbabwe, 1947-2010
- Authors: Kusena, Bernard
- Date: 2019
- Subjects: Mutare (Zimbabwe) -- History , Zimbabwe -- History , Food security -- Zimbabwe , Poverty -- Zimbabwe , Rural pooer -- Zimbabwe , Crop losses -- Zimbabwe , Food relief -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/92865 , vital:30757
- Description: By taking Mutare District as its lens to explore the dynamics of rural food security in Zimbabwe, this thesis assesses the role of the state in tackling hunger among its rural populations. It examines the impact of colonial and post-colonial food policy on efforts to combat food insecurity. The thesis explores the uneasy options pursued by rural communities in response to droughts and other threats of hunger. It identifies and ranks crop failure as the chief culprit to the district’s efforts towards food security. The thesis illustrates the contestations between the state and its rural people over which sustainable approaches to adopt in order to end hunger and how such debates continually shaped policy. It grapples with questions about the various understandings of food security advanced by scholars within the rural African context. It demonstrates, for instance, that the post-colonial state inherited an erstwhile crop production structure which shunned food crops in favour of cash crops. There was obvious bias against local preferences for a robust, home-grown food regime which did not put rural livelihoods at risk of starvation. The thesis also argues that food can be used as an instrument of war as evidenced during the liberation struggle when the vast majority of people residing in rural areas, particularly women and children, were pushed to the edges of survival. In addition, the thesis demonstrates that the infamous Marange diamonds turned out to be a curse rather than a blessing due to the state’s lack of transparency in the beneficiation chain. It concludes by a detailed examination of the political economy of food aid, demonstrating why donors have not succeeded for long to combat hunger in the district. In light of this background, the thesis provides a more nuanced analysis of the whole question of rural food security using archival material, newspapers, government and civil society reports, interviews and field observation. The thesis benefits from the use of a multi-pronged theoretical framework to capture the disparate themes that form the bedrock of this study.
- Full Text:
- Authors: Kusena, Bernard
- Date: 2019
- Subjects: Mutare (Zimbabwe) -- History , Zimbabwe -- History , Food security -- Zimbabwe , Poverty -- Zimbabwe , Rural pooer -- Zimbabwe , Crop losses -- Zimbabwe , Food relief -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/92865 , vital:30757
- Description: By taking Mutare District as its lens to explore the dynamics of rural food security in Zimbabwe, this thesis assesses the role of the state in tackling hunger among its rural populations. It examines the impact of colonial and post-colonial food policy on efforts to combat food insecurity. The thesis explores the uneasy options pursued by rural communities in response to droughts and other threats of hunger. It identifies and ranks crop failure as the chief culprit to the district’s efforts towards food security. The thesis illustrates the contestations between the state and its rural people over which sustainable approaches to adopt in order to end hunger and how such debates continually shaped policy. It grapples with questions about the various understandings of food security advanced by scholars within the rural African context. It demonstrates, for instance, that the post-colonial state inherited an erstwhile crop production structure which shunned food crops in favour of cash crops. There was obvious bias against local preferences for a robust, home-grown food regime which did not put rural livelihoods at risk of starvation. The thesis also argues that food can be used as an instrument of war as evidenced during the liberation struggle when the vast majority of people residing in rural areas, particularly women and children, were pushed to the edges of survival. In addition, the thesis demonstrates that the infamous Marange diamonds turned out to be a curse rather than a blessing due to the state’s lack of transparency in the beneficiation chain. It concludes by a detailed examination of the political economy of food aid, demonstrating why donors have not succeeded for long to combat hunger in the district. In light of this background, the thesis provides a more nuanced analysis of the whole question of rural food security using archival material, newspapers, government and civil society reports, interviews and field observation. The thesis benefits from the use of a multi-pronged theoretical framework to capture the disparate themes that form the bedrock of this study.
- Full Text:
Science in the service of society: Is marine and coastal science addressing South Africa's needs?
- Cochrane, Kevern L, Sauer, Warwick H H, Aswani, Shankar
- Authors: Cochrane, Kevern L , Sauer, Warwick H H , Aswani, Shankar
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126071 , vital:35847 , https://doi.10.17159/sajs.2019/4418
- Description: The modern world is confronted with many and diverse social and environmental challenges of high complexity. In South Africa, rapid and sustainable development is needed to address high levels of poverty and unemployment but this development has to take place in the context of an environment that is already severely impacted by human activities. Sound and relevant scientific input and advice, covering the full scope of each challenge, is essential for effective decisions and actions to address the needs. South Africa has the benefit of strong scientific capacity but the country’s National Development Plan reported that national research priorities were not always consistent with South Africa’s needs. We investigate the validity of that conclusion in the coastal and marine sciences by examining presentations made at the 2017 South African Marine Science Symposium on the theme of ‘Unlocking the ocean’s economic potential whilst maintaining social and ecological resilience’. Despite the theme, only 21% of the presentations were judged to be actionable and directly relevant to societal needs, as defined by the criteria used. Less than 7% were evaluated as being interdisciplinary within the natural sciences and approximately 10% were found to include both natural and human sciences. Poor representation by the human sciences was also noteworthy. This preliminary assessment highlights the need for an urgent review of the disciplinary representation and approaches in marine and coastal science in South Africa in the context of the priority practical needs of the country now and into the future.
- Full Text:
- Authors: Cochrane, Kevern L , Sauer, Warwick H H , Aswani, Shankar
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126071 , vital:35847 , https://doi.10.17159/sajs.2019/4418
- Description: The modern world is confronted with many and diverse social and environmental challenges of high complexity. In South Africa, rapid and sustainable development is needed to address high levels of poverty and unemployment but this development has to take place in the context of an environment that is already severely impacted by human activities. Sound and relevant scientific input and advice, covering the full scope of each challenge, is essential for effective decisions and actions to address the needs. South Africa has the benefit of strong scientific capacity but the country’s National Development Plan reported that national research priorities were not always consistent with South Africa’s needs. We investigate the validity of that conclusion in the coastal and marine sciences by examining presentations made at the 2017 South African Marine Science Symposium on the theme of ‘Unlocking the ocean’s economic potential whilst maintaining social and ecological resilience’. Despite the theme, only 21% of the presentations were judged to be actionable and directly relevant to societal needs, as defined by the criteria used. Less than 7% were evaluated as being interdisciplinary within the natural sciences and approximately 10% were found to include both natural and human sciences. Poor representation by the human sciences was also noteworthy. This preliminary assessment highlights the need for an urgent review of the disciplinary representation and approaches in marine and coastal science in South Africa in the context of the priority practical needs of the country now and into the future.
- Full Text:
Secret sex lives in the intertidal: insights into the mating systems of clinid fishes from molecular parentage analyses
- Authors: Scheeper, Martinus Johannes
- Date: 2019
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/72438 , vital:30048
- Description: Expected release date-April 2020
- Full Text: false
- Authors: Scheeper, Martinus Johannes
- Date: 2019
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/72438 , vital:30048
- Description: Expected release date-April 2020
- Full Text: false
Sectioned or whole otoliths? A global review of hard structure preparation techniques used in ageing sparid fishes
- Winkler, Alexander C, Duncan, Murray I, Farthing, Matthew W, Potts, Warren M
- Authors: Winkler, Alexander C , Duncan, Murray I , Farthing, Matthew W , Potts, Warren M
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126733 , vital:35917 , https://doi.10.1007/s11160-019-09571-1
- Description: While otoliths are considered the most reliable structure to accurately age fish, a variety of otolith preparation techniques are available, which have consequences on the otolith’s optical properties and therefore interpretation of growth bands. Recently, numerous studies from a variety of authors have criticised the use of whole otoliths in ageing sparids with sectioned otoliths subsequently acknowledged as the most reliable preparation technique. Despite this criticism; ageing data is still being generated from whole otoliths and other unreliable structures such as scales. In an attempt to understand the severity of this issue we conducted a global literature review of otolith preparation protocols used for sparids. We identified global spatial inconsistencies in otolith preparation techniques with some regions predominately using methods other than sectioned otoliths to age sparids. The review highlights the need for a standardisation of otolith preparation methods and a move towards the use of sectioned otoliths, or at least valid support where alternative structures or preparation techniques are used. Given that large numbers of studies have been conducted on whole otoliths in certain regions, it may be necessary to revaluate the existing growth parameters to ensure that accurate information is incorporated into management structures.
- Full Text:
- Authors: Winkler, Alexander C , Duncan, Murray I , Farthing, Matthew W , Potts, Warren M
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/126733 , vital:35917 , https://doi.10.1007/s11160-019-09571-1
- Description: While otoliths are considered the most reliable structure to accurately age fish, a variety of otolith preparation techniques are available, which have consequences on the otolith’s optical properties and therefore interpretation of growth bands. Recently, numerous studies from a variety of authors have criticised the use of whole otoliths in ageing sparids with sectioned otoliths subsequently acknowledged as the most reliable preparation technique. Despite this criticism; ageing data is still being generated from whole otoliths and other unreliable structures such as scales. In an attempt to understand the severity of this issue we conducted a global literature review of otolith preparation protocols used for sparids. We identified global spatial inconsistencies in otolith preparation techniques with some regions predominately using methods other than sectioned otoliths to age sparids. The review highlights the need for a standardisation of otolith preparation methods and a move towards the use of sectioned otoliths, or at least valid support where alternative structures or preparation techniques are used. Given that large numbers of studies have been conducted on whole otoliths in certain regions, it may be necessary to revaluate the existing growth parameters to ensure that accurate information is incorporated into management structures.
- Full Text:
Segmenting objects with indistinct edges, with application to aerial imagery of vegetation
- James, Katherine M F, Bradshaw, Karen L
- Authors: James, Katherine M F , Bradshaw, Karen L
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/460614 , vital:75969 , ISBN 9781450372657 , https://doi.org/10.1145/3351108.3351124
- Description: Image segmentation mask creation relies on objects having distinct edges. While this may be true for the objects seen in many image segmentation challenges, it is less so when approaching tasks such as segmentation of vegetation in aerial imagery. Such datasets contain indistinct edges, or areas of mixed information at edges, which introduces a level of annotator subjectivity at edge pixels. Existing loss functions apply equal learning ability to both these pixels of low and high annotation confidence. In this paper, we propose a weight map based loss function that takes into account low confidence in the annotation at edges of objects by down-weighting the contribution of these pixels to the overall loss. We examine different weight map designs to find the most optimal one when applied to a dataset of aerial imagery of vegetation, with the task of segmenting a particular genus of shrub from other land cover types. When compared to inverse class frequency weighted binary cross-entropy loss, we found that using weight map-based loss produced a better performing model than binary cross-entropy loss, improving F1 score by 4%.
- Full Text:
- Authors: James, Katherine M F , Bradshaw, Karen L
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/460614 , vital:75969 , ISBN 9781450372657 , https://doi.org/10.1145/3351108.3351124
- Description: Image segmentation mask creation relies on objects having distinct edges. While this may be true for the objects seen in many image segmentation challenges, it is less so when approaching tasks such as segmentation of vegetation in aerial imagery. Such datasets contain indistinct edges, or areas of mixed information at edges, which introduces a level of annotator subjectivity at edge pixels. Existing loss functions apply equal learning ability to both these pixels of low and high annotation confidence. In this paper, we propose a weight map based loss function that takes into account low confidence in the annotation at edges of objects by down-weighting the contribution of these pixels to the overall loss. We examine different weight map designs to find the most optimal one when applied to a dataset of aerial imagery of vegetation, with the task of segmenting a particular genus of shrub from other land cover types. When compared to inverse class frequency weighted binary cross-entropy loss, we found that using weight map-based loss produced a better performing model than binary cross-entropy loss, improving F1 score by 4%.
- Full Text:
Selected Namibian secondary school geography teachers’ pedagogical thinking and practices: the case of mapwork
- Naxweka, Johanna Ndamononghenda
- Authors: Naxweka, Johanna Ndamononghenda
- Date: 2019
- Subjects: Geography -- Study and teaching (Secondary) -- Namibia , Cartography -- Study and teaching (Secondary) -- Namibia , Maps -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/76969 , vital:30651
- Description: Learner performance in mapwork in secondary school geography in Namibia has been consistently poor. Examiners’ reports provide detailed feedback on the difficulties learners demonstrate with little, if any, attention paid to teachers’ perceptions, experiences and pedagogical practices of mapwork. This qualitative study generated insights to understand selected geography teachers’ perceptions and pedagogical practices of mapwork. Data were generated through a questionnaire administered to thirty geography teachers in fifteen secondary schools in the Ohangwena Circuit in the Ohangwena Region of Namibia. The teachers’ responses were coded and analyzed and patterns and trends identified. Based on what emerged, a purposive sample of three teachers was chosen for in-depth interviews to probe their responses and to observe their classroom practices. The study draws on learner centred pedagogy (LCP), the official educational policy in Namibia, and Shulman’s perspectives of teachers’ content and pedagogical content knowledge (PCK) (1986, 1987) to interpret what teachers say about the teaching of mapwork and how they teach it. The qualities of teachers’ PCK that support student learning in mapwork are not yet fully understood because there has been little research on teachers’ PCK for teaching mapwork and spatial thinking in geography classrooms (Jo & Bednarz, 2014). The study sheds light on the teachers’ qualifications and experience, their perceptions and attitudes towards the teaching of mapwork, their teaching strategies and the resources they use. The findings reveal that the teachers are conscientious but ill-equipped to teach mapwork. The study illuminated a disjuncture between the rhetoric and practice of learner centred pedagogy. There is evidence which suggests that the teachers’ knowledge of the curriculum is superficial and limited to content. Their practices are focused on teaching map skills and procedural knowledge with little, if any, attention given to spatial and map conceptual understanding and application of knowledge to solve problems. The study concludes that teachers’ map and spatial conceptual understanding and pedagogical content knowledge should be strengthened if the persistent problem of poor learner attainment is to be resolved. It provides insights that may be of value to Namibian teachers, teacher educators, curriculum policy developers and Senior Education Officers when addressing this problem.
- Full Text:
- Authors: Naxweka, Johanna Ndamononghenda
- Date: 2019
- Subjects: Geography -- Study and teaching (Secondary) -- Namibia , Cartography -- Study and teaching (Secondary) -- Namibia , Maps -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/76969 , vital:30651
- Description: Learner performance in mapwork in secondary school geography in Namibia has been consistently poor. Examiners’ reports provide detailed feedback on the difficulties learners demonstrate with little, if any, attention paid to teachers’ perceptions, experiences and pedagogical practices of mapwork. This qualitative study generated insights to understand selected geography teachers’ perceptions and pedagogical practices of mapwork. Data were generated through a questionnaire administered to thirty geography teachers in fifteen secondary schools in the Ohangwena Circuit in the Ohangwena Region of Namibia. The teachers’ responses were coded and analyzed and patterns and trends identified. Based on what emerged, a purposive sample of three teachers was chosen for in-depth interviews to probe their responses and to observe their classroom practices. The study draws on learner centred pedagogy (LCP), the official educational policy in Namibia, and Shulman’s perspectives of teachers’ content and pedagogical content knowledge (PCK) (1986, 1987) to interpret what teachers say about the teaching of mapwork and how they teach it. The qualities of teachers’ PCK that support student learning in mapwork are not yet fully understood because there has been little research on teachers’ PCK for teaching mapwork and spatial thinking in geography classrooms (Jo & Bednarz, 2014). The study sheds light on the teachers’ qualifications and experience, their perceptions and attitudes towards the teaching of mapwork, their teaching strategies and the resources they use. The findings reveal that the teachers are conscientious but ill-equipped to teach mapwork. The study illuminated a disjuncture between the rhetoric and practice of learner centred pedagogy. There is evidence which suggests that the teachers’ knowledge of the curriculum is superficial and limited to content. Their practices are focused on teaching map skills and procedural knowledge with little, if any, attention given to spatial and map conceptual understanding and application of knowledge to solve problems. The study concludes that teachers’ map and spatial conceptual understanding and pedagogical content knowledge should be strengthened if the persistent problem of poor learner attainment is to be resolved. It provides insights that may be of value to Namibian teachers, teacher educators, curriculum policy developers and Senior Education Officers when addressing this problem.
- Full Text:
Semantic waves: Context, complexity and academic discourse
- Authors: Maton, Karl
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/445894 , vital:74440 , ISBN 9780429280726 , https://www.taylorfrancis.com/chapters/edit/10.4324/9780429280726-3/semantic-waves-karl-maton
- Description: This chapter introduces ideas from the Legitimation Code Theory dimension of ‘Semantics’ that have been influential in shaping research into academic discourse and theory in systemic functional linguistics (SFL). The concepts of ‘semantic gravity’ and ‘semantic density’ explore the context-dependence and complexity of meanings. These concepts have been used widely by applied systemic linguists in research into education and beyond. They have also helped spur theoretical development in the framework of SFL – specifically Martin’s meta-concepts of ‘mass’ and ‘presence’. This chapter is an introduction to the concepts and illustration of how they are being used in research into accessing academic discourse. It begins by briefly highlighting how LCT concepts attend to two key obstacles to supporting knowledge-building: knowledge-blindness and shallow theorizing. Second, the key concepts are defined. Third, the chapter demonstrates how these LCT concepts are being used to explore education, drawing on studies of student assessments and teaching practice. These analyses suggest that ‘semantic waves’, where knowledge is transformed between relatively decontextualized, condensed meanings and context-dependent, simplified meanings, are the key to student achievement and enabling knowledge-building in teaching practice. How these concepts are being widely used to explore organizing principles of diverse practices in education beyond classrooms, including research and curriculum, is discussed, revealing the widespread, complex and suggestive nature of ‘semantic waves’ and their implications for understanding how to promote access to academic discourse.
- Full Text:
- Authors: Maton, Karl
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/445894 , vital:74440 , ISBN 9780429280726 , https://www.taylorfrancis.com/chapters/edit/10.4324/9780429280726-3/semantic-waves-karl-maton
- Description: This chapter introduces ideas from the Legitimation Code Theory dimension of ‘Semantics’ that have been influential in shaping research into academic discourse and theory in systemic functional linguistics (SFL). The concepts of ‘semantic gravity’ and ‘semantic density’ explore the context-dependence and complexity of meanings. These concepts have been used widely by applied systemic linguists in research into education and beyond. They have also helped spur theoretical development in the framework of SFL – specifically Martin’s meta-concepts of ‘mass’ and ‘presence’. This chapter is an introduction to the concepts and illustration of how they are being used in research into accessing academic discourse. It begins by briefly highlighting how LCT concepts attend to two key obstacles to supporting knowledge-building: knowledge-blindness and shallow theorizing. Second, the key concepts are defined. Third, the chapter demonstrates how these LCT concepts are being used to explore education, drawing on studies of student assessments and teaching practice. These analyses suggest that ‘semantic waves’, where knowledge is transformed between relatively decontextualized, condensed meanings and context-dependent, simplified meanings, are the key to student achievement and enabling knowledge-building in teaching practice. How these concepts are being widely used to explore organizing principles of diverse practices in education beyond classrooms, including research and curriculum, is discussed, revealing the widespread, complex and suggestive nature of ‘semantic waves’ and their implications for understanding how to promote access to academic discourse.
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