Classification of network information flow analysis (CONIFA) to detect new application versions
- Authors: Azab, Ahmad
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: Monitoring network traffic to identify applications or services is vital for internet service providers, network engineers and law enforcement agencies. The identification of applications enables network traffic to be prioritized, sophisticated plans for network infrastructure to be developed and facilitates the work of law enforcement agencies. Voice over IP (VoIP) and malware services are important to be classified because of the reliance by both legitimate users and cybercriminals respectively on these services. This dissertation addresses the detection of these services, represented by Skype application voice calls traffic and Zeus application command and control traffic. Three major approaches have been used to fulfil the classification goal, which are port-based, deep packet inspection and the use of the statistical features in conjunction with the machine learning algorithms. The latter approach addressed many of the limitations of the first two. However, the existing approach still contains many limitations. The detection of new versions by analysing and building the classifier on an old version was not deeply discussed for the machine learning approach. However, not all the statistical values are similar for different versions for Skype voice calls and Zeus command and control traffic. This is because Skype uses different codecs for different versions and Zeus uses different malware builders for different versions. While some approaches, aside from the machine learning approach, tackled the detection of the different versions, none of them maintain all the characteristics supported by the machine learning approach in terms of providing online classification capability and supporting various transport and application protocols, without the need to access different device’s traffic, access packet’s content or monitor different phase’s traffic. This research study aims to tackle this gap by proposing a novel framework called Classification of Network Information Flow Analysis (CONIFA). CONIFA addresses the detection of different untrained versions for a targeted application (Skype voice calls and Zeus command and control traffic) with a low detection time by analysing and building the classifier on a different single version in a systematic and well-defined approach, providing online classification capability and supporting various transport and application protocols, without the need to access different device’s traffic, access packet’s content or monitor different phase’s traffic. CONIFA is not limited to a specific application and could be extended to other types of applications. CONIFA utilizes the concepts of cost sensitive algorithms and different feature combinations for building the classifiers, unlike the machine learning approach that utilizes cost insensitive algorithms and a single feature combination. The outputs of the first phase are two classifiers, lenient and strict, that are used by the next phase to detect the untrained versions of a targeted application as well as to reduce the error rate. CONIFA results, for detecting the untrained version of Skype voice calls and Zeus C&C traffic, supported this approach in providing a better detection performance compared to the previous approach. While the previous approach was not able to reliably detect new versions of VoIP, CONIFA was able to consistently detect a previously unseen version. For the botnet detection, the previous approach had a good efficacy at the network level. However, CONIFA outperformed this approach in detecting a new version of a known piece of malware.
- Description: Doctor of Philosophy
- Authors: Azab, Ahmad
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: Monitoring network traffic to identify applications or services is vital for internet service providers, network engineers and law enforcement agencies. The identification of applications enables network traffic to be prioritized, sophisticated plans for network infrastructure to be developed and facilitates the work of law enforcement agencies. Voice over IP (VoIP) and malware services are important to be classified because of the reliance by both legitimate users and cybercriminals respectively on these services. This dissertation addresses the detection of these services, represented by Skype application voice calls traffic and Zeus application command and control traffic. Three major approaches have been used to fulfil the classification goal, which are port-based, deep packet inspection and the use of the statistical features in conjunction with the machine learning algorithms. The latter approach addressed many of the limitations of the first two. However, the existing approach still contains many limitations. The detection of new versions by analysing and building the classifier on an old version was not deeply discussed for the machine learning approach. However, not all the statistical values are similar for different versions for Skype voice calls and Zeus command and control traffic. This is because Skype uses different codecs for different versions and Zeus uses different malware builders for different versions. While some approaches, aside from the machine learning approach, tackled the detection of the different versions, none of them maintain all the characteristics supported by the machine learning approach in terms of providing online classification capability and supporting various transport and application protocols, without the need to access different device’s traffic, access packet’s content or monitor different phase’s traffic. This research study aims to tackle this gap by proposing a novel framework called Classification of Network Information Flow Analysis (CONIFA). CONIFA addresses the detection of different untrained versions for a targeted application (Skype voice calls and Zeus command and control traffic) with a low detection time by analysing and building the classifier on a different single version in a systematic and well-defined approach, providing online classification capability and supporting various transport and application protocols, without the need to access different device’s traffic, access packet’s content or monitor different phase’s traffic. CONIFA is not limited to a specific application and could be extended to other types of applications. CONIFA utilizes the concepts of cost sensitive algorithms and different feature combinations for building the classifiers, unlike the machine learning approach that utilizes cost insensitive algorithms and a single feature combination. The outputs of the first phase are two classifiers, lenient and strict, that are used by the next phase to detect the untrained versions of a targeted application as well as to reduce the error rate. CONIFA results, for detecting the untrained version of Skype voice calls and Zeus C&C traffic, supported this approach in providing a better detection performance compared to the previous approach. While the previous approach was not able to reliably detect new versions of VoIP, CONIFA was able to consistently detect a previously unseen version. For the botnet detection, the previous approach had a good efficacy at the network level. However, CONIFA outperformed this approach in detecting a new version of a known piece of malware.
- Description: Doctor of Philosophy
The cutting angle method and its applications
- Authors: Bagirov, Adil
- Date: 2001
- Type: Text , Thesis , PhD
- Full Text:
- Description: "The main objective of this thesis is to develop and study new techniques for solving global optimization problems and to apply them to solving data classification problems."
- Authors: Bagirov, Adil
- Date: 2001
- Type: Text , Thesis , PhD
- Full Text:
- Description: "The main objective of this thesis is to develop and study new techniques for solving global optimization problems and to apply them to solving data classification problems."
Open data and interoperability standards : opportunities for animal welfare in extensive livestock systems
- Authors: Bahlo, Christiane
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Extensive livestock farming constitutes a sizeable portion of agriculture, not only in relation to land use, but in contribution to feeding a growing human population. In addition to meat, it contributes other economically valuable commodities such as wool, hides and other products. The livestock industries are adopting technologies under the banner of Precision Livestock Farming (PLF) to help meet higher production and efficiency targets as well as help to manage the multiple challenges impacting the industries, such as climate change, environmental concerns, globalisation of markets, increasing rules of governance and societal scrutiny especially in relation to animal welfare. PLF is particularly dependent on the acquisition and management of data and metadata and on the interoperability standards that allow data discovery and federation. A review of interoperability standards and PLF adoption in extensive livestock farming systems identified a lack of domain specific standards and raised questions related to the amount and quality of public data which has potential to inform livestock farming. A systematic review of public datasets, which included an assessment based on the principles that data must be findable, accessible, interoperable and reusable (FAIR) was developed. Custom software scripts were used to conduct a dataset search to determine the quantity and quality of domain specific datasets yielded 419 unique Australian datasets directly related to extensive livestock farming. A FAIR assessment of these datasets using a set of non-domain specific, general metrics showed a moderate level of compliance. The results suggest that domain specific FAIR metrics may need to be developed to provide a more accurate data quality assessment, but also that the level of interoperability and reusability is not particularly high which has implications if public data is to be included in decision support tools. To test the usefulness of available public datasets in informing decision support in relation to livestock welfare, a case study was designed and farm animal welfare elements were extracted from Australian welfare standards to guide a dataset search. It was found that with few exceptions, these elements could be supported with public data, although there were gaps in temporal and spatial coverage. The development of a geospatial animal welfare portal including these datasets further explored and confirmed the potential for using public data to enhance livestock welfare.
- Description: Doctor of Philosophy
- Authors: Bahlo, Christiane
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Extensive livestock farming constitutes a sizeable portion of agriculture, not only in relation to land use, but in contribution to feeding a growing human population. In addition to meat, it contributes other economically valuable commodities such as wool, hides and other products. The livestock industries are adopting technologies under the banner of Precision Livestock Farming (PLF) to help meet higher production and efficiency targets as well as help to manage the multiple challenges impacting the industries, such as climate change, environmental concerns, globalisation of markets, increasing rules of governance and societal scrutiny especially in relation to animal welfare. PLF is particularly dependent on the acquisition and management of data and metadata and on the interoperability standards that allow data discovery and federation. A review of interoperability standards and PLF adoption in extensive livestock farming systems identified a lack of domain specific standards and raised questions related to the amount and quality of public data which has potential to inform livestock farming. A systematic review of public datasets, which included an assessment based on the principles that data must be findable, accessible, interoperable and reusable (FAIR) was developed. Custom software scripts were used to conduct a dataset search to determine the quantity and quality of domain specific datasets yielded 419 unique Australian datasets directly related to extensive livestock farming. A FAIR assessment of these datasets using a set of non-domain specific, general metrics showed a moderate level of compliance. The results suggest that domain specific FAIR metrics may need to be developed to provide a more accurate data quality assessment, but also that the level of interoperability and reusability is not particularly high which has implications if public data is to be included in decision support tools. To test the usefulness of available public datasets in informing decision support in relation to livestock welfare, a case study was designed and farm animal welfare elements were extracted from Australian welfare standards to guide a dataset search. It was found that with few exceptions, these elements could be supported with public data, although there were gaps in temporal and spatial coverage. The development of a geospatial animal welfare portal including these datasets further explored and confirmed the potential for using public data to enhance livestock welfare.
- Description: Doctor of Philosophy
Higher education massification and pedagogic adaptation : An investigation of business teaching excellence in inclusive university environments
- Authors: Baker, Adam
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Massification, a phenomenon driven by both the collective aspirations of citizens and governmental encouragement of a highly skilled workforce, is revolutionising the field of higher education. The student body, particularly in widened participation universities, has expanded in number and diversity increasing the demands on HE institutions and their teaching staff. Australian business school graduates are expected to drive national success in fast-changing, globally competitive business environments. This qualitative study investigates characteristics of teaching excellence in widened-participation teaching environments in Australian business schools. The recency of the massification phenomenon has meant theoretical conceptualisations are sparse so Grounded Theory was used to generate new theory. Using university entry scores as a surrogate for an academically inclusive student cohort, 23 award winning teachers from the business schools of eight universities were interviewed. These exemplary business educators displayed strong similarities in terms of their approach to teaching. Seven dimensions of diversity that significantly impact teaching within a widened-participation environment were identified. This thesis argues that alignment between the diversity of cohort and both the type of educators and the pedagogic strategies they employ is the key to unlocking teaching excellence within widened-participation universities, thus giving rise to the notion of context mediated pedagogy and the associated conceptual model. Findings from this study are significant because extreme student diversity is now the norm in many university environments and a better understanding of teaching excellence may offer specific insights for policymakers, academic leaders and educators seeking to adapt pedagogy for the massified HE environment. Improving teaching quality in these widened-participation universities has the power to significantly impact on individual student success, whilst driving innovation on the global stage.
- Description: Doctor of Philosophy
- Authors: Baker, Adam
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Massification, a phenomenon driven by both the collective aspirations of citizens and governmental encouragement of a highly skilled workforce, is revolutionising the field of higher education. The student body, particularly in widened participation universities, has expanded in number and diversity increasing the demands on HE institutions and their teaching staff. Australian business school graduates are expected to drive national success in fast-changing, globally competitive business environments. This qualitative study investigates characteristics of teaching excellence in widened-participation teaching environments in Australian business schools. The recency of the massification phenomenon has meant theoretical conceptualisations are sparse so Grounded Theory was used to generate new theory. Using university entry scores as a surrogate for an academically inclusive student cohort, 23 award winning teachers from the business schools of eight universities were interviewed. These exemplary business educators displayed strong similarities in terms of their approach to teaching. Seven dimensions of diversity that significantly impact teaching within a widened-participation environment were identified. This thesis argues that alignment between the diversity of cohort and both the type of educators and the pedagogic strategies they employ is the key to unlocking teaching excellence within widened-participation universities, thus giving rise to the notion of context mediated pedagogy and the associated conceptual model. Findings from this study are significant because extreme student diversity is now the norm in many university environments and a better understanding of teaching excellence may offer specific insights for policymakers, academic leaders and educators seeking to adapt pedagogy for the massified HE environment. Improving teaching quality in these widened-participation universities has the power to significantly impact on individual student success, whilst driving innovation on the global stage.
- Description: Doctor of Philosophy
Efficient conic decomposition and projection onto a cone in a Banach ordered space
- Authors: Baratov, Rishat
- Date: 2005
- Type: Text , Thesis , PhD
- Full Text:
- Description: The goal of this research is to study general cone decomposition.
- Description: Doctor of Philosophy
- Authors: Baratov, Rishat
- Date: 2005
- Type: Text , Thesis , PhD
- Full Text:
- Description: The goal of this research is to study general cone decomposition.
- Description: Doctor of Philosophy
Applicability of LAMP as a field diagnostic test for haemonchus contortus and fasciola hepatica infection
- Authors: Bari, Tanjina
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Gastrointestinal parasites Haemonchus contortus and Fasciola hepatica are major impediments to livestock production worldwide. Faecal egg counts remain the most commonly used and widely accepted diagnostic tool for these parasites; however, there is a need for improved, field-applicable diagnostics. In this study, loop-mediated isothermal amplification (LAMP) was optimised and evaluated for the detection of H. contortus (in sheep) and F. hepatica (in cattle) infection. LAMP assays were optimised to enable visual detection using calcein dye. DNA extraction techniques were developed that have the potential for on-farm application. Faeces suspended in water, heated, then centrifuged, with two cheap and stable chemicals, enabled detection of H. contortus at clinically relevant infection burdens. For F. hepatica, a faeces-water suspension was sieved to remove particulate matter, then physical disruption (bead-beating) was applied. LAMP was conducted under laboratory conditions and in the field; compared to FEC (the most commonly used diagnostic for the target parasites) and PCR. LAMP was conducted using three incubation methods: a commercially available thermocycler; a field-friendly low-cost portable styrofoam esky; and a dedicated field applicable LAMP incubator. The general trend was for LAMP to have high sensitivity but only moderate specificity when compared to FEC. However, the use of PCR (both pathogens) and a highly sensitive amended FEC (F. hepatica only) suggested that the apparent low specificity was the result of LAMP being able to detect low-level parasite infection when conventional FEC could not. A LAMP assay paired with a potentially field-applicable DNA extraction was able to adequately detect haemonchosis at ‘clinically relevant’ parasite burdens in a laboratory study. A field study for the detection of F. hepatica demonstrated the potential utility of LAMP on-farm. The studies conducted in this thesis demonstrate the potential of LAMP for parasitic disease diagnosis in agriculture.
- Description: Doctor of Philosophy
- Authors: Bari, Tanjina
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Gastrointestinal parasites Haemonchus contortus and Fasciola hepatica are major impediments to livestock production worldwide. Faecal egg counts remain the most commonly used and widely accepted diagnostic tool for these parasites; however, there is a need for improved, field-applicable diagnostics. In this study, loop-mediated isothermal amplification (LAMP) was optimised and evaluated for the detection of H. contortus (in sheep) and F. hepatica (in cattle) infection. LAMP assays were optimised to enable visual detection using calcein dye. DNA extraction techniques were developed that have the potential for on-farm application. Faeces suspended in water, heated, then centrifuged, with two cheap and stable chemicals, enabled detection of H. contortus at clinically relevant infection burdens. For F. hepatica, a faeces-water suspension was sieved to remove particulate matter, then physical disruption (bead-beating) was applied. LAMP was conducted under laboratory conditions and in the field; compared to FEC (the most commonly used diagnostic for the target parasites) and PCR. LAMP was conducted using three incubation methods: a commercially available thermocycler; a field-friendly low-cost portable styrofoam esky; and a dedicated field applicable LAMP incubator. The general trend was for LAMP to have high sensitivity but only moderate specificity when compared to FEC. However, the use of PCR (both pathogens) and a highly sensitive amended FEC (F. hepatica only) suggested that the apparent low specificity was the result of LAMP being able to detect low-level parasite infection when conventional FEC could not. A LAMP assay paired with a potentially field-applicable DNA extraction was able to adequately detect haemonchosis at ‘clinically relevant’ parasite burdens in a laboratory study. A field study for the detection of F. hepatica demonstrated the potential utility of LAMP on-farm. The studies conducted in this thesis demonstrate the potential of LAMP for parasitic disease diagnosis in agriculture.
- Description: Doctor of Philosophy
A collaborative exploration of creativity, doodling and flow : A practice-based education inquiry
- Authors: Barrand, Katherine
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: The initial stage of this inquiry is a solo exploration of my definition of doodling, how doodling became my preferred artistic process, and reflectively examines the factors that contribute to my experience of flow moments when creating art. An intrinsic component of this solo research was finding new ways to create moments of flow when working individually, and reflecting how they could influence and shape the second stage of the project. The second stage of this inquiry investigates doodling in collaboration with four participating artists. In an attempt to flesh out the spaces between conscious and unconscious artistic interventions, and the role that outside influences can play on the creative process, this collaborative inquiry developed into an examination of the factors which influence co-creation during different stages of art making. The framework for this second inquiry was created by utilising insights gained from the initial solo investigation Accordingly, this research includes multiple strands of artistic exploration, including solo works, works created in collaboration, and interviews with the collaborating artists involved in the project. Selected key solo works and all artistic collaborations are included in the body of this exegesis to encourage immersion in this practice based research. Beginning as an artist and incorporating the different roles of researcher and teacher into the work, this research is an a/r/tographical inquiry into the way these oftentimes overlapping identities influence and guided the research. The outcomes from this research include insights into my creative processes, revealing previously unacknowledged tensions between the need for creative control and flow. One of the most important outcomes from this research was the development of non-verbal conversations between artists, and the way the collaborative process has the potential to both encourage and hinder flow moments. This work is a self-study which incorporates others in relation to my own work. I believe it holds significant relevance to a wider artistic audience seeking a different perspective on encouraging collaborative artistic flow, and the method of collaborative doodling enacted in this research has potential applications in both formal and informal educational settings.
- Description: Doctor of Philosophy
- Authors: Barrand, Katherine
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: The initial stage of this inquiry is a solo exploration of my definition of doodling, how doodling became my preferred artistic process, and reflectively examines the factors that contribute to my experience of flow moments when creating art. An intrinsic component of this solo research was finding new ways to create moments of flow when working individually, and reflecting how they could influence and shape the second stage of the project. The second stage of this inquiry investigates doodling in collaboration with four participating artists. In an attempt to flesh out the spaces between conscious and unconscious artistic interventions, and the role that outside influences can play on the creative process, this collaborative inquiry developed into an examination of the factors which influence co-creation during different stages of art making. The framework for this second inquiry was created by utilising insights gained from the initial solo investigation Accordingly, this research includes multiple strands of artistic exploration, including solo works, works created in collaboration, and interviews with the collaborating artists involved in the project. Selected key solo works and all artistic collaborations are included in the body of this exegesis to encourage immersion in this practice based research. Beginning as an artist and incorporating the different roles of researcher and teacher into the work, this research is an a/r/tographical inquiry into the way these oftentimes overlapping identities influence and guided the research. The outcomes from this research include insights into my creative processes, revealing previously unacknowledged tensions between the need for creative control and flow. One of the most important outcomes from this research was the development of non-verbal conversations between artists, and the way the collaborative process has the potential to both encourage and hinder flow moments. This work is a self-study which incorporates others in relation to my own work. I believe it holds significant relevance to a wider artistic audience seeking a different perspective on encouraging collaborative artistic flow, and the method of collaborative doodling enacted in this research has potential applications in both formal and informal educational settings.
- Description: Doctor of Philosophy
The Millers : historical analysis of an early Australian colonial family
- Authors: Barrera, Jennifer
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: In July 1823, a family originally from Derry-Londonderry, Ireland, embarked on the long journey from Chatham Dockyards, along with the first despatch of troops from the 40th Regiment, to the colony of New South Wales. Lieutenant Henry Miller would become the first commandant of the Moreton Bay penal settlement. But by August 1825, Lieutenant Miller had been replaced—in effect, dismissed—and the family relocated to Van Diemen’s Land. This thesis explores the growing importance of family history in the twenty-first century as a popular pursuit for engaging with and writing history. It highlights family history’s potential for historical inquiry and its capacity to unpack settler colonial history and the role of the individual in Empire. It offers fresh historical perspectives on Australia’s colonial experiment. The research uses the combined methodologies of microhistory, biography and family history to recover the lives of Henry Miller, his wife Jane, sons Henry and Mars, his father the Reverend Miller, as well as, the diverse and interconnected lives of Captain John Townson, his brother Robert, convict Sarah Griggs, and her children. As a number of scholarly histories in the last decade have shown, family history as an approach for engaging with the past continues to gain attention globally and offers powerful benefits to those who engage with it, for the family historian and academic historian alike. The six core chapters that comprise this thesis demonstrate the importance of family history research to deepening our understanding of the past and its capacity to change the way we think and write about the past. This thesis aims to make a substantial and original contribution to Australian colonial history by recovering powerful lost voices and identities, and connecting the past with the present in a more intimate and accessible way through the exploration of a colonial family.
- Description: Doctor of Philosophy
- Authors: Barrera, Jennifer
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: In July 1823, a family originally from Derry-Londonderry, Ireland, embarked on the long journey from Chatham Dockyards, along with the first despatch of troops from the 40th Regiment, to the colony of New South Wales. Lieutenant Henry Miller would become the first commandant of the Moreton Bay penal settlement. But by August 1825, Lieutenant Miller had been replaced—in effect, dismissed—and the family relocated to Van Diemen’s Land. This thesis explores the growing importance of family history in the twenty-first century as a popular pursuit for engaging with and writing history. It highlights family history’s potential for historical inquiry and its capacity to unpack settler colonial history and the role of the individual in Empire. It offers fresh historical perspectives on Australia’s colonial experiment. The research uses the combined methodologies of microhistory, biography and family history to recover the lives of Henry Miller, his wife Jane, sons Henry and Mars, his father the Reverend Miller, as well as, the diverse and interconnected lives of Captain John Townson, his brother Robert, convict Sarah Griggs, and her children. As a number of scholarly histories in the last decade have shown, family history as an approach for engaging with the past continues to gain attention globally and offers powerful benefits to those who engage with it, for the family historian and academic historian alike. The six core chapters that comprise this thesis demonstrate the importance of family history research to deepening our understanding of the past and its capacity to change the way we think and write about the past. This thesis aims to make a substantial and original contribution to Australian colonial history by recovering powerful lost voices and identities, and connecting the past with the present in a more intimate and accessible way through the exploration of a colonial family.
- Description: Doctor of Philosophy
The impacts of climate change on trade and foreign direct investment flows
- Authors: Barua, Suborna
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: A growing body of climate economics research suggests that climate change affects production, prices, distribution structures, investments and national income. Studies further describe international trade and climate related investments as key activities in climate impact mitigation and adaptation. However, despite its increasing relevance, the empirical link between climate change and international trade and investment remains largely unexplored. This thesis investigates the climate change impacts on trade and foreign direct investment (FDI) flows using static and dynamic panel estimations covering 102 countries. The modelling uses temperature and precipitation variability to separately evaluate changes in international trade from 1962 to 2014, and in FDI inflows from 1995 to 2014. The trade impacts estimations consider exports of total merchandise, agriculture and six agricultural sectors; while controlling for income, comparative advantage, productivity, domestic and trade policies, and climate zones. The FDI impacts modelling evaluates total and sectoral inflows, while controlling for income, market size, infrastructure, openness, financial development, the global financial crisis and climate zones. Results show that climate change significantly affects both exports and FDI inflows. In particular, temperature affects merchandise exports, negatively at the global and developing country level, and positively in high-income countries. Agricultural exports are negatively affected by temperature. At the sectoral level, oil-seeds and dairy are mostly affected. Precipitation effects are limited and mostly negative for agriculture. The FDI world aggregate flows respond mostly positively to both temperature and precipitation, and static estimations indicate a FDI positive response in developing countries. Furthermore, FDI sectoral estimations indicate a differentiated response. Findings could inform the formulation of trade and investment policies, at the national and global level, in consideration to the differential impacts of climate change across sectors, regions and economic status. Furthermore, these estimates could be used in projections considering climate change as a determinant of trade and investment flows.
- Description: Doctor of Philosophy
- Authors: Barua, Suborna
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: A growing body of climate economics research suggests that climate change affects production, prices, distribution structures, investments and national income. Studies further describe international trade and climate related investments as key activities in climate impact mitigation and adaptation. However, despite its increasing relevance, the empirical link between climate change and international trade and investment remains largely unexplored. This thesis investigates the climate change impacts on trade and foreign direct investment (FDI) flows using static and dynamic panel estimations covering 102 countries. The modelling uses temperature and precipitation variability to separately evaluate changes in international trade from 1962 to 2014, and in FDI inflows from 1995 to 2014. The trade impacts estimations consider exports of total merchandise, agriculture and six agricultural sectors; while controlling for income, comparative advantage, productivity, domestic and trade policies, and climate zones. The FDI impacts modelling evaluates total and sectoral inflows, while controlling for income, market size, infrastructure, openness, financial development, the global financial crisis and climate zones. Results show that climate change significantly affects both exports and FDI inflows. In particular, temperature affects merchandise exports, negatively at the global and developing country level, and positively in high-income countries. Agricultural exports are negatively affected by temperature. At the sectoral level, oil-seeds and dairy are mostly affected. Precipitation effects are limited and mostly negative for agriculture. The FDI world aggregate flows respond mostly positively to both temperature and precipitation, and static estimations indicate a FDI positive response in developing countries. Furthermore, FDI sectoral estimations indicate a differentiated response. Findings could inform the formulation of trade and investment policies, at the national and global level, in consideration to the differential impacts of climate change across sectors, regions and economic status. Furthermore, these estimates could be used in projections considering climate change as a determinant of trade and investment flows.
- Description: Doctor of Philosophy
History of the Ballarat Trades and Labour Council 1856-2000
- Authors: Beacham, Jennifer
- Date: 2022
- Type: Text , Thesis , PhD
- Full Text:
- Description: The Ballarat Trades and Labour Council (BT&LC) is the second oldest trades and labour council in the world, founded in 1883, although it has existed in various forms since 1856. This thesis examines the history of the BT&LC in terms of five related themes – ideological conflict, solidarity, labourism, masculinity, and spatiality. I approached this research project from the perspective of a labour historian, which also included issues of gender. While being resolute in writing the history of this institution, my aim was also to capture an aspect of Ballarat history that had not been examined before – the role of workers and their families. The BT&LC sets the parameters of its history from the Eureka Rebellion and gaining the Eight Hour Day for Ballarat stonemasons in 1856 a fortnight after their Melbourne counterparts. Since that time, the BT&LC has built the substantial Trades Hall in Camp Street, which it still occupies and hosted the Seventh Intercolonial Trade Union Congress in 1891 when the decision to seek political representation was formally endorsed. It witnessed the emergence of the new elites and the ideological struggle that became more bitter as the Catholic Church, Protestant Freemasons, and the very active Communist Party battled for supremacy, with it ending inevitably in a divisive public separation in 1955. The Whitlam years saw their resurgence with a new face to unionism as public sector workers, teachers and nurses became militant and women began to take significant roles. In Ballarat while this has meant political ascendancy since 1980, the success of the political wing has not necessarily been mirrored in the fortunes of the peak union organisation. Ballarat’s overall union membership has declined. The old loyalties have been difficult to maintain and the capacity to build new alliances is challenging. However, one thing remains clear: strong individuals who understand the underpinnings of solidarity and unity have ensured that the Ballarat Trades and Labour Council has remained a significant feature of the Ballarat public landscape.
- Description: Doctor of Philosophy
- Authors: Beacham, Jennifer
- Date: 2022
- Type: Text , Thesis , PhD
- Full Text:
- Description: The Ballarat Trades and Labour Council (BT&LC) is the second oldest trades and labour council in the world, founded in 1883, although it has existed in various forms since 1856. This thesis examines the history of the BT&LC in terms of five related themes – ideological conflict, solidarity, labourism, masculinity, and spatiality. I approached this research project from the perspective of a labour historian, which also included issues of gender. While being resolute in writing the history of this institution, my aim was also to capture an aspect of Ballarat history that had not been examined before – the role of workers and their families. The BT&LC sets the parameters of its history from the Eureka Rebellion and gaining the Eight Hour Day for Ballarat stonemasons in 1856 a fortnight after their Melbourne counterparts. Since that time, the BT&LC has built the substantial Trades Hall in Camp Street, which it still occupies and hosted the Seventh Intercolonial Trade Union Congress in 1891 when the decision to seek political representation was formally endorsed. It witnessed the emergence of the new elites and the ideological struggle that became more bitter as the Catholic Church, Protestant Freemasons, and the very active Communist Party battled for supremacy, with it ending inevitably in a divisive public separation in 1955. The Whitlam years saw their resurgence with a new face to unionism as public sector workers, teachers and nurses became militant and women began to take significant roles. In Ballarat while this has meant political ascendancy since 1980, the success of the political wing has not necessarily been mirrored in the fortunes of the peak union organisation. Ballarat’s overall union membership has declined. The old loyalties have been difficult to maintain and the capacity to build new alliances is challenging. However, one thing remains clear: strong individuals who understand the underpinnings of solidarity and unity have ensured that the Ballarat Trades and Labour Council has remained a significant feature of the Ballarat public landscape.
- Description: Doctor of Philosophy
Ernabella Rules football : Australian Rules football at the Ernabella Mission, 1937-1974
- Authors: Beck, Adam
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: The experience of sport for First Nations peoples on missions and government settlements in Australia, and on comparable missions in other settler colonial societies, has become a growing field of scholarly study. This thesis aims to build on insights from current sports historiography by examining the origins and significance of Australian Rules football to the people of the Anangu Pitjantjatjara Yankunytjatjara (APY) Lands in the far northwest of South Australia. In particular, it investigates their historical engagement with the game at the Ernabella mission (now known as Pukatja) during the years of its operation from 1937 to 1974. It traces the spread of the game from Ernabella to other nearby communities in the 1960s and investigates the conception that football originated in the town of Alice Springs during the Second World War and gradually spread outward into the hinterland where most Aboriginal people lived. Based on ethnographic fieldwork conducted on the APY Lands, this thesis draws on Anangu oral histories, and a careful examination of local historical materials and photographs held in the Ara Irititja Archive to produce detailed descriptions and portrayals of Australian football at the Ernabella mission from the perspectives of those who lived, worked and played the game at the mission. It argues that a focus on the agency of Anangu at Ernabella is crucial to understanding how the game of Australian football took off and became embedded in local society and culture.
- Description: Doctor of Philosophy
- Authors: Beck, Adam
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: The experience of sport for First Nations peoples on missions and government settlements in Australia, and on comparable missions in other settler colonial societies, has become a growing field of scholarly study. This thesis aims to build on insights from current sports historiography by examining the origins and significance of Australian Rules football to the people of the Anangu Pitjantjatjara Yankunytjatjara (APY) Lands in the far northwest of South Australia. In particular, it investigates their historical engagement with the game at the Ernabella mission (now known as Pukatja) during the years of its operation from 1937 to 1974. It traces the spread of the game from Ernabella to other nearby communities in the 1960s and investigates the conception that football originated in the town of Alice Springs during the Second World War and gradually spread outward into the hinterland where most Aboriginal people lived. Based on ethnographic fieldwork conducted on the APY Lands, this thesis draws on Anangu oral histories, and a careful examination of local historical materials and photographs held in the Ara Irititja Archive to produce detailed descriptions and portrayals of Australian football at the Ernabella mission from the perspectives of those who lived, worked and played the game at the mission. It argues that a focus on the agency of Anangu at Ernabella is crucial to understanding how the game of Australian football took off and became embedded in local society and culture.
- Description: Doctor of Philosophy
Create, curate, cooperate : Exploring the process of sport safety resource development
- Authors: Bekker, Sheree
- Date: 2017
- Type: Text , Thesis , PhD
- Full Text:
- Description: Sports injuries are a significant public health burden both in Australia, and worldwide. Preventing injuries in sports settings is thus an important public health goal. It is now generally accepted that sports injuries are, like other unintentional injuries, largely preventable. Yet intractable problems remain. Complexity theory is harnessed in this research as a means of understanding such problems. To provide new insights into the complexity of sports safety promotion, this research consisted of a qualitative case study design underpinned by constructivist assumptions. Study A documented sports injury prevention and safety promotion resources available from the websites of key sporting organisations. A thematic document analysis approach was used to identify and describe how many, and what types of, resources were available, as well as the sports injury prevention and safety promotion issues addressed. The findings of Study A suggest that sport settings have access to a proliferation of rival resources, which reflects a potentially inefficient and ineffective manner in which to influence policy/practice. Study B determined the process that key intermediary organisations used to develop and disseminate the resources identified in Study A. Interviews with key participants about organisational processes of knowledge translation were undertaken, and a qualitative description approach was used to examine their accounts. The findings of Study B suggest that intermediary organisations can, and do, take on knowledge translation roles in order to make research knowledge more relevant (timely, salient, actionable), accessible (formatted and available), and legitimate (credible) for end-users. A complexity approach was applied to this study to assist in recognising that open systems (stratification and fluidity), non-linearity (emergent properties and feedback loops), and improbability (demi-regularities and the ability to evolve, learn, and adapt) underscore sports safety. This study explicates and examines key insights and implications of adopting a complexity approach to the prevention of injury in sport settings.
- Description: Doctor of Philosophy
- Authors: Bekker, Sheree
- Date: 2017
- Type: Text , Thesis , PhD
- Full Text:
- Description: Sports injuries are a significant public health burden both in Australia, and worldwide. Preventing injuries in sports settings is thus an important public health goal. It is now generally accepted that sports injuries are, like other unintentional injuries, largely preventable. Yet intractable problems remain. Complexity theory is harnessed in this research as a means of understanding such problems. To provide new insights into the complexity of sports safety promotion, this research consisted of a qualitative case study design underpinned by constructivist assumptions. Study A documented sports injury prevention and safety promotion resources available from the websites of key sporting organisations. A thematic document analysis approach was used to identify and describe how many, and what types of, resources were available, as well as the sports injury prevention and safety promotion issues addressed. The findings of Study A suggest that sport settings have access to a proliferation of rival resources, which reflects a potentially inefficient and ineffective manner in which to influence policy/practice. Study B determined the process that key intermediary organisations used to develop and disseminate the resources identified in Study A. Interviews with key participants about organisational processes of knowledge translation were undertaken, and a qualitative description approach was used to examine their accounts. The findings of Study B suggest that intermediary organisations can, and do, take on knowledge translation roles in order to make research knowledge more relevant (timely, salient, actionable), accessible (formatted and available), and legitimate (credible) for end-users. A complexity approach was applied to this study to assist in recognising that open systems (stratification and fluidity), non-linearity (emergent properties and feedback loops), and improbability (demi-regularities and the ability to evolve, learn, and adapt) underscore sports safety. This study explicates and examines key insights and implications of adopting a complexity approach to the prevention of injury in sport settings.
- Description: Doctor of Philosophy
A region-based progressive image compression technique : RePic
- Authors: Bell, Daniel
- Date: 2000
- Type: Text , Thesis , PhD
- Full Text: false
- Description: "This thesis is concerned with the development of RePIC, a new method for the representation and compression of images in such a way that allows the image to be progressively reconstructed."
- Description: Doctor of Philosophy
- Authors: Bell, Daniel
- Date: 2000
- Type: Text , Thesis , PhD
- Full Text: false
- Description: "This thesis is concerned with the development of RePIC, a new method for the representation and compression of images in such a way that allows the image to be progressively reconstructed."
- Description: Doctor of Philosophy
Tropical cyclone tracks in CMIP5 models : statistical assessment and future projections
- Authors: Bell, Samuel
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Tropical cyclones (TCs) can have devastating social and economic impacts on coastal communities situated all around the globe. The impact of anthropogenic induced climate change on TC activity has attracted widespread scientific interest over the past decade, resulting in the development of a variety of approaches for TC projection in climate models. However, many uncertainties remain, including those associated with the TC detection algorithm and climate model inter-dependencies that impact projection results. This thesis seeks to address these uncertainties, as well as filling several knowledge gaps in the literature such as limited TC projection studies in the Southern Hemisphere and a global need for regional-scale TC track density projections. The independent TC detection and tracking algorithm utilised in this thesis is first evaluated to determine if it can simulate a realistic TC track climatology in reanalysis data. By way of cluster analysis, model-detected and observed TC tracks are compared and objective criteria for a consistent “TC track” definition are established. Regional-scale TC track projections are then examined in each TC basin around the globe. The exact methodology of cluster analysis in each basin is slightly modified to accommodate basin-scale differences in track climatology but generally follows a cluster assessment of TC tracks in observations, historical climate simulations and future climate projections using results from the Coupled Model Intercomparison Project Phase 5 (CMIP5) models. Regional impacts of the El Niño Southern Oscillation (ENSO) on TC tracks are also examined in current- and future-climates. Projection results are found to be supportive of existing studies, especially in the North Pacific and the Southern Hemisphere. Isolation of TC tracks into clusters indicated that the regional dominance of ENSO is well simulated by the CMIP5 models. Several regional changes in TC activity are noted and attributed to projected changes in the large-scale environment, and changes in ENSO-specific conditions.
- Description: Doctor of Philosophy
- Authors: Bell, Samuel
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Tropical cyclones (TCs) can have devastating social and economic impacts on coastal communities situated all around the globe. The impact of anthropogenic induced climate change on TC activity has attracted widespread scientific interest over the past decade, resulting in the development of a variety of approaches for TC projection in climate models. However, many uncertainties remain, including those associated with the TC detection algorithm and climate model inter-dependencies that impact projection results. This thesis seeks to address these uncertainties, as well as filling several knowledge gaps in the literature such as limited TC projection studies in the Southern Hemisphere and a global need for regional-scale TC track density projections. The independent TC detection and tracking algorithm utilised in this thesis is first evaluated to determine if it can simulate a realistic TC track climatology in reanalysis data. By way of cluster analysis, model-detected and observed TC tracks are compared and objective criteria for a consistent “TC track” definition are established. Regional-scale TC track projections are then examined in each TC basin around the globe. The exact methodology of cluster analysis in each basin is slightly modified to accommodate basin-scale differences in track climatology but generally follows a cluster assessment of TC tracks in observations, historical climate simulations and future climate projections using results from the Coupled Model Intercomparison Project Phase 5 (CMIP5) models. Regional impacts of the El Niño Southern Oscillation (ENSO) on TC tracks are also examined in current- and future-climates. Projection results are found to be supportive of existing studies, especially in the North Pacific and the Southern Hemisphere. Isolation of TC tracks into clusters indicated that the regional dominance of ENSO is well simulated by the CMIP5 models. Several regional changes in TC activity are noted and attributed to projected changes in the large-scale environment, and changes in ENSO-specific conditions.
- Description: Doctor of Philosophy
Bi what means : Paratextual and filmic representations of bisexuality in contemporary cinema
- Authors: Benson, Chloe
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: The question of how bisexuality, which is predominantly nonvisual and lacks a coherent cinematic code, can be represented in film remains a consistent concern within bisexual cinema studies. Scholars have tended to approach this problem by concentrating on the ways that the film text itself codes bisexuality or encourages a bisexual reading. This approach can offer important insights into the potential for and problems of screening bisexuality. However, this thesis argues that in order to more fully explore how bisexual meaning is constructed, critical attention must extend beyond the confines of the film text to engage in what Jonathon Gray describes as a form of “off-screen studies” (7). By developing a sustained engagement between paratextual theory and bisexual cinema studies this project develops a new methodological approach to filmic representations of bisexuality. Two samples of bisexual films and the official entryway paratexts - such as posters, trailers, and festival program notes - used to promote them are examined. These samples comprise films screened in the period from 2012-2014 on either the Melbourne general release circuit or at the Melbourne Queer Film Festival that have been identified online by viewers as incorporating bisexual meanings. Considering these texts in relation to their exhibition contexts, the thesis demonstrates that bisexual films can be found in diverse settings. It also establishes the impact that these settings have on the ways the films are framed paratextually. Close textual readings illustrate that paratexts can function as discrete texts that circulate bisexual meanings, as well as framings with the potential to prime viewers’ receptivity to onscreen bisexuality. The thesis reveals that the promotional impetus of paratexts can lead to the amplifying or subduing of bisexual readings across exhibition contexts and argues that an understanding of filmic bisexuality must acknowledge this. In sum, the thesis proposes that paratexts play a formative role in the production and circulation of bisexual meanings both on screen and off, within the niche realm of the queer film festival and on the general release circuit.
- Description: Doctor of Philosophy
- Authors: Benson, Chloe
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: The question of how bisexuality, which is predominantly nonvisual and lacks a coherent cinematic code, can be represented in film remains a consistent concern within bisexual cinema studies. Scholars have tended to approach this problem by concentrating on the ways that the film text itself codes bisexuality or encourages a bisexual reading. This approach can offer important insights into the potential for and problems of screening bisexuality. However, this thesis argues that in order to more fully explore how bisexual meaning is constructed, critical attention must extend beyond the confines of the film text to engage in what Jonathon Gray describes as a form of “off-screen studies” (7). By developing a sustained engagement between paratextual theory and bisexual cinema studies this project develops a new methodological approach to filmic representations of bisexuality. Two samples of bisexual films and the official entryway paratexts - such as posters, trailers, and festival program notes - used to promote them are examined. These samples comprise films screened in the period from 2012-2014 on either the Melbourne general release circuit or at the Melbourne Queer Film Festival that have been identified online by viewers as incorporating bisexual meanings. Considering these texts in relation to their exhibition contexts, the thesis demonstrates that bisexual films can be found in diverse settings. It also establishes the impact that these settings have on the ways the films are framed paratextually. Close textual readings illustrate that paratexts can function as discrete texts that circulate bisexual meanings, as well as framings with the potential to prime viewers’ receptivity to onscreen bisexuality. The thesis reveals that the promotional impetus of paratexts can lead to the amplifying or subduing of bisexual readings across exhibition contexts and argues that an understanding of filmic bisexuality must acknowledge this. In sum, the thesis proposes that paratexts play a formative role in the production and circulation of bisexual meanings both on screen and off, within the niche realm of the queer film festival and on the general release circuit.
- Description: Doctor of Philosophy
Exploring the interior : performing situated responsibility in postcolonising Australia
- Authors: Berger, Karen
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Theatre is a powerful way to investigate the operation of borders due to its live, immediate focus on representation and its potential to test a society’s boundaries. This practice-led research incorporates a performance and an exegesis to ask, ‘How can site-specific theatre that investigates the performance of borders and heterotopia enhance understanding of individual responsibility in postcolonising Australia?’ I take the term postcolonising from Aileen Moreton-Robinson, who argues that the beneficiaries of settler-colonialism (such as myself) must accept responsibility for the past before attempting to address its injustices. As an artist, I am inspired by anthropologist, Deborah Bird Rose, who privileges storytelling as a way of breaking boundaries between the past and present. Michel Foucault coined the term heterotopia (other place) to denote a single real space that juxtaposes several sites that are incompatible. This evokes the contemporary Australian situation of contested sovereignty. As Joanne Tompkins argues, heterotopic theatre can enact such a space in order to raise awareness and work towards societal change. My research demonstrates this both theoretically and practically. My exegesis crosses borders to create a heterotopia by juxtaposing past, present and possible futures, stories and theoretical understandings from diverse sources. The performance created at my home, rather than in a theatre, layers family, local, Australian and international histories to highlight the continuum between the personal and political, and to question current structures of power and knowledge. I use site-specific theatre to diminish the boundaries between performer and audience, creating a visceral heterotopia that facilitates a deeper understanding of personal responsibility in the context of postcolonising Australia.
- Description: Doctor of Philosophy
- Authors: Berger, Karen
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Theatre is a powerful way to investigate the operation of borders due to its live, immediate focus on representation and its potential to test a society’s boundaries. This practice-led research incorporates a performance and an exegesis to ask, ‘How can site-specific theatre that investigates the performance of borders and heterotopia enhance understanding of individual responsibility in postcolonising Australia?’ I take the term postcolonising from Aileen Moreton-Robinson, who argues that the beneficiaries of settler-colonialism (such as myself) must accept responsibility for the past before attempting to address its injustices. As an artist, I am inspired by anthropologist, Deborah Bird Rose, who privileges storytelling as a way of breaking boundaries between the past and present. Michel Foucault coined the term heterotopia (other place) to denote a single real space that juxtaposes several sites that are incompatible. This evokes the contemporary Australian situation of contested sovereignty. As Joanne Tompkins argues, heterotopic theatre can enact such a space in order to raise awareness and work towards societal change. My research demonstrates this both theoretically and practically. My exegesis crosses borders to create a heterotopia by juxtaposing past, present and possible futures, stories and theoretical understandings from diverse sources. The performance created at my home, rather than in a theatre, layers family, local, Australian and international histories to highlight the continuum between the personal and political, and to question current structures of power and knowledge. I use site-specific theatre to diminish the boundaries between performer and audience, creating a visceral heterotopia that facilitates a deeper understanding of personal responsibility in the context of postcolonising Australia.
- Description: Doctor of Philosophy
Examining the assessment and development of a fundamental motor skill and the efficacy of peer teaching instructional approaches
- Authors: Beseler, Bradley
- Date: 2022
- Type: Text , Thesis , PhD
- Full Text:
- Description: The overall purpose of this dissertation was to examine the process of assessing and developing the Fundamental Motor Skills (FMS) of overarm throwing. This dissertation involved two foci: qualitative assessment of FMS and the efficacy of peer teaching approaches. The first focus was to contribute to qualitative assessment of FMS research by examining an assessment system commonly used to assess overarm throwing development. The second focus was to examine the efficacy of peer teaching instructional approaches on improving overarm throwing performance of pre-service physical education (PE) teachers to determine whether these approaches could facilitate pre-service PE teachers to efficiently develop FMS proficiency. PE teachers who can proficiently perform FMS are better equipped to teach these skills; their demonstrations provide the learners a “blueprint” of the skill they are trying to acquire. The research includes four separate studies. The first two studies examined Roberton’s levels (Roberton & Halverson, 1984), a qualitative assessment system used extensively for over four decades to research overarm throwing development, primarily examining the technique of children and older throwers. Study 1 attempted to validate one of the backswing sequences (Haywood et al., 1991) to authenticate it for assessing the backswing component of university-aged throwers. The findings provided preliminary support that the Haywood et al. backswing sequence, previously only validated for assessing the backswing technique of older throwers, was suitable for assessing the backswing of the university-aged throwers. Study 2 examined the impact of the follow-through on throwing velocity. Findings showed the follow-through had the second largest impact on throwing velocity of all the six components, providing preliminary support for the inclusion of the follow-through component to the existing five components of Roberton’s (Roberton & Halverson, 1984) levels, making this system more accurate and comprehensive. Study 3 and 4 both utilised a quasi-experimenal between-subjects pre-test, intervention, post-test, and retention test designs. The participants were allocated to one of three experimental groups: a Video Analysis Group (VAG), a Verbal Group (VG), and a Control Group (CG). During the interventions the VAG and VG worked in pairs in a Reciprocal style of peer teaching (Mosston & Ashworth, 2002). The VAG and VG interventions were identical except the VAG had access to video analysis technology and the CG completed unrelated course work. Study 3, a single session intervention, and Study 4, a three-session intervention, attempted to ascertain whether video analysis affects throwing technique of participants working in reciprocal peer teaching settings. The findings indicated the impact of video analysis may be dependent on the number of intervention sessions. In Study 3, video analysis in a single session intervention appeared to accelerate the participants throwing improvement. Study 4 revealed video analysis was not vital over the course of the three sessions. The VAG and VG achieved similar throwing improvements that were superior to the CG who did not experience the peer teaching intervention. The findings from this dissertation have identified scope for the Roberton’s levels (Roberton & Halverson, 1984) to be refined and the two peer teaching instructional approaches examined have been shown to be effective when trying to develop overarm throwing. Furthermore, these findings can inform Physical Education Teacher Education Programs, potentially preparing graduate PE teachers more effectively to develop their students’ FMS, which may increase the involvement of children and adolescents in sport and physical activity because they will have the necessary skills to successfully engage in these activities.
- Description: Doctor of Philosophy
- Authors: Beseler, Bradley
- Date: 2022
- Type: Text , Thesis , PhD
- Full Text:
- Description: The overall purpose of this dissertation was to examine the process of assessing and developing the Fundamental Motor Skills (FMS) of overarm throwing. This dissertation involved two foci: qualitative assessment of FMS and the efficacy of peer teaching approaches. The first focus was to contribute to qualitative assessment of FMS research by examining an assessment system commonly used to assess overarm throwing development. The second focus was to examine the efficacy of peer teaching instructional approaches on improving overarm throwing performance of pre-service physical education (PE) teachers to determine whether these approaches could facilitate pre-service PE teachers to efficiently develop FMS proficiency. PE teachers who can proficiently perform FMS are better equipped to teach these skills; their demonstrations provide the learners a “blueprint” of the skill they are trying to acquire. The research includes four separate studies. The first two studies examined Roberton’s levels (Roberton & Halverson, 1984), a qualitative assessment system used extensively for over four decades to research overarm throwing development, primarily examining the technique of children and older throwers. Study 1 attempted to validate one of the backswing sequences (Haywood et al., 1991) to authenticate it for assessing the backswing component of university-aged throwers. The findings provided preliminary support that the Haywood et al. backswing sequence, previously only validated for assessing the backswing technique of older throwers, was suitable for assessing the backswing of the university-aged throwers. Study 2 examined the impact of the follow-through on throwing velocity. Findings showed the follow-through had the second largest impact on throwing velocity of all the six components, providing preliminary support for the inclusion of the follow-through component to the existing five components of Roberton’s (Roberton & Halverson, 1984) levels, making this system more accurate and comprehensive. Study 3 and 4 both utilised a quasi-experimenal between-subjects pre-test, intervention, post-test, and retention test designs. The participants were allocated to one of three experimental groups: a Video Analysis Group (VAG), a Verbal Group (VG), and a Control Group (CG). During the interventions the VAG and VG worked in pairs in a Reciprocal style of peer teaching (Mosston & Ashworth, 2002). The VAG and VG interventions were identical except the VAG had access to video analysis technology and the CG completed unrelated course work. Study 3, a single session intervention, and Study 4, a three-session intervention, attempted to ascertain whether video analysis affects throwing technique of participants working in reciprocal peer teaching settings. The findings indicated the impact of video analysis may be dependent on the number of intervention sessions. In Study 3, video analysis in a single session intervention appeared to accelerate the participants throwing improvement. Study 4 revealed video analysis was not vital over the course of the three sessions. The VAG and VG achieved similar throwing improvements that were superior to the CG who did not experience the peer teaching intervention. The findings from this dissertation have identified scope for the Roberton’s levels (Roberton & Halverson, 1984) to be refined and the two peer teaching instructional approaches examined have been shown to be effective when trying to develop overarm throwing. Furthermore, these findings can inform Physical Education Teacher Education Programs, potentially preparing graduate PE teachers more effectively to develop their students’ FMS, which may increase the involvement of children and adolescents in sport and physical activity because they will have the necessary skills to successfully engage in these activities.
- Description: Doctor of Philosophy
Conflict and conservation : sharing the costs and benefits of tiger (Panthera tigris) conservation in communities adjacent to tiger reserves in Nepal
- Authors: Bhattarai, Babu
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Human wildlife conflict (HWC) is a highly studied but unresolved aspect of wildlife management. To further knowledge on HWC, this study used a multidisciplinary approach to investigate HWC implications for local people living adjacent to two key tiger conservation reserves in Nepal. The study also assessed the potential to redistribute financial benefits accruing from predator conservation to those bearing costs through associated HWC. Secondary data and anecdotal reports suggest that local people experience significant direct and indirect costs from predator conservation through livestock losses following attacks by common leopards and Bengal tigers, and additionally, crop losses due to their prey species plus two mega herbivores (elephant and one-horned rhinoceros). To investigate this situation, data regarding HWC incidents and costs were sourced through interviews with 422 local households, direct observations, and stakeholder interviews. Collected data included livestock loss (5-year time-period) and crop loss (1-year time-period). Complementary direct observation data collated livestock loss and crop damage for 12 months. Interviews were conducted also with park visitors (N=387) and tourism business owners (N=74). Results showed that tigers are involved in significantly fewer depredation events compared to leopards. Leopards predominantly killed small to medium livestock whereas tigers selected both small to medium and large sized livestock. Livestock depredation events occurred more frequently in livestock corrals relative to forest zones or crop fields. Rates of livestock losses per household per year self-reported during interviews with local people were found higher when compared to those observed by direct measurement. Prey species of tigers and leopards (most often wild boar and chital) were involved in more frequently in crop raiding events, and caused more crop damage, when compared that caused by mega herbivores. Quantities of crops lost per household were lowest in communities where effective physical barriers to wildlife were present. Park visitors and tourism business owners indicated willingness to pay for conservation of tigers and for compensation of farmers for the losses caused by tigers and their prey species. Study findings support several key recommendations proposed to mitigate negative HWC effects in the study area. These include financial support for local communities to build predator proof livestock corrals and establishment of effective physical barriers at the park borders. A dedicated tariff for park visitors and a levy for tourism business owners are also recommended to fund ongoing predator conservation and support financial compensation for local farmers affected by HWC.
- Description: Doctor of Philosophy
- Authors: Bhattarai, Babu
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Human wildlife conflict (HWC) is a highly studied but unresolved aspect of wildlife management. To further knowledge on HWC, this study used a multidisciplinary approach to investigate HWC implications for local people living adjacent to two key tiger conservation reserves in Nepal. The study also assessed the potential to redistribute financial benefits accruing from predator conservation to those bearing costs through associated HWC. Secondary data and anecdotal reports suggest that local people experience significant direct and indirect costs from predator conservation through livestock losses following attacks by common leopards and Bengal tigers, and additionally, crop losses due to their prey species plus two mega herbivores (elephant and one-horned rhinoceros). To investigate this situation, data regarding HWC incidents and costs were sourced through interviews with 422 local households, direct observations, and stakeholder interviews. Collected data included livestock loss (5-year time-period) and crop loss (1-year time-period). Complementary direct observation data collated livestock loss and crop damage for 12 months. Interviews were conducted also with park visitors (N=387) and tourism business owners (N=74). Results showed that tigers are involved in significantly fewer depredation events compared to leopards. Leopards predominantly killed small to medium livestock whereas tigers selected both small to medium and large sized livestock. Livestock depredation events occurred more frequently in livestock corrals relative to forest zones or crop fields. Rates of livestock losses per household per year self-reported during interviews with local people were found higher when compared to those observed by direct measurement. Prey species of tigers and leopards (most often wild boar and chital) were involved in more frequently in crop raiding events, and caused more crop damage, when compared that caused by mega herbivores. Quantities of crops lost per household were lowest in communities where effective physical barriers to wildlife were present. Park visitors and tourism business owners indicated willingness to pay for conservation of tigers and for compensation of farmers for the losses caused by tigers and their prey species. Study findings support several key recommendations proposed to mitigate negative HWC effects in the study area. These include financial support for local communities to build predator proof livestock corrals and establishment of effective physical barriers at the park borders. A dedicated tariff for park visitors and a levy for tourism business owners are also recommended to fund ongoing predator conservation and support financial compensation for local farmers affected by HWC.
- Description: Doctor of Philosophy
Rule-based interactive assisted reinforcement learning
- Authors: Bignold, Adam
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Reinforcement Learning (RL) has seen increasing interest over the past few years, partially owing to breakthroughs in the digestion and application of external information. The use of external information results in improved learning speeds and solutions to more complex domains. This thesis, a collection of five key contributions, demonstrates that comparable performance gains to existing Interactive Reinforcement Learning methods can be achieved using less data, sourced during operation, and without prior verifcation and validation of the information's integrity. First, this thesis introduces Assisted Reinforcement Learning (ARL), a collective term referring to RL methods that utilise external information to leverage the learning process, and provides a non-exhaustive review of current ARL methods. Second, two advice delivery methods common in ARL, evaluative and informative, are compared through human trials. The comparison highlights how human engagement, accuracy of advice, agent performance, and advice utility differ between the two methods. Third, this thesis introduces simulated users as a methodology for testing and comparing ARL methods. Simulated users enable testing and comparing of ARL systems without costly and time-consuming human trials. While not a replacement for well-designed human trials, simulated users offer a cheap and robust approach to ARL design and comparison. Fourth, the concept of persistence is introduced to Interactive Reinforcement Learning. The retention and reuse of advice maximises utility and can lead to improved performance and reduced human demand. Finally, this thesis presents rule-based interactive RL, an iterative method for providing advice to an agent. Existing interactive RL methods rely on constant human supervision and evaluation, requiring a substantial commitment from the advice-giver. Rule-based advice can be provided proactively and be generalised over the state-space while remaining flexible enough to handle potentially inaccurate or irrelevant information. Ultimately, the thesis contributions are validated empirically and clearly show that rule-based advice signicantly reduces human guidance requirements while improving agent performance.
- Description: Doctor of Pholosophy
- Authors: Bignold, Adam
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Reinforcement Learning (RL) has seen increasing interest over the past few years, partially owing to breakthroughs in the digestion and application of external information. The use of external information results in improved learning speeds and solutions to more complex domains. This thesis, a collection of five key contributions, demonstrates that comparable performance gains to existing Interactive Reinforcement Learning methods can be achieved using less data, sourced during operation, and without prior verifcation and validation of the information's integrity. First, this thesis introduces Assisted Reinforcement Learning (ARL), a collective term referring to RL methods that utilise external information to leverage the learning process, and provides a non-exhaustive review of current ARL methods. Second, two advice delivery methods common in ARL, evaluative and informative, are compared through human trials. The comparison highlights how human engagement, accuracy of advice, agent performance, and advice utility differ between the two methods. Third, this thesis introduces simulated users as a methodology for testing and comparing ARL methods. Simulated users enable testing and comparing of ARL systems without costly and time-consuming human trials. While not a replacement for well-designed human trials, simulated users offer a cheap and robust approach to ARL design and comparison. Fourth, the concept of persistence is introduced to Interactive Reinforcement Learning. The retention and reuse of advice maximises utility and can lead to improved performance and reduced human demand. Finally, this thesis presents rule-based interactive RL, an iterative method for providing advice to an agent. Existing interactive RL methods rely on constant human supervision and evaluation, requiring a substantial commitment from the advice-giver. Rule-based advice can be provided proactively and be generalised over the state-space while remaining flexible enough to handle potentially inaccurate or irrelevant information. Ultimately, the thesis contributions are validated empirically and clearly show that rule-based advice signicantly reduces human guidance requirements while improving agent performance.
- Description: Doctor of Pholosophy
Statistical assessment of Australian bushfire conditions : long-term changes and variability
- Authors: Biswas, Soubhik
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: In the wake of increasing bushfire impacts in recent decades across the Australian landscape, questions arise regarding the role played by weather conditions, climate variability and long-term climate change. This thesis seeks to quantify the following components that can influence fire risk: (1) the effects of weather and mean climate conditions, (2) large-scale drivers of natural climate variability, (3) the influence of extreme weather events and (4) the contribution of long-term anthropogenic climate change. Bushfire risks associated with weather and climate factors in Australia are generally assessed using indices such as the Forest Fire Danger Index (FFDI). The FFDI is used in this study, calculated from daily values of rainfall, relative humidity, temperature and wind speed, providing a generalised approach for combining those four weather factors known to influence fire behaviour. This study also aims to fill several knowledge gaps in the literature. For example, a comprehensive study of climatology, variability and trends in Australia's fire weather conditions was never attempted before using a high-resolution and a very long-term fire weather dataset. The fire weather conditions were analysed using a long-term FFDI dataset constructed from 20th Century reanalysis climatic data with bias correction applied because reconstructed weather datasets like 20th Century reanalysis products often show systemic biases. Various statistical bias correction approaches based on quantile-quantile matching were compared, and a spline-based method was selected due to its higher precision in correcting a distribution for the purposes of this study. The relationship of this calibrated FFDI dataset with the climate drivers of El Niño-Southern Oscillation (ENSO), Indian Ocean Dipole (IOD), Southern Annular Mode (SAM) and Interdecadal Pacific Oscillation (IPO) was analysed. Results are mapped to show the regional and seasonal fluctuations in the severe fire weather across Australia during different combinations of ENSO, IOD, and SAM phases. During the austral spring and summer seasons, the highest frequency of severe fire weather conditions occurred for the combination of positive ENSO (i.e., El Nino), positive IOD and negative SAM. The calibrated FFDI dataset derived from bias-corrected Twentieth Century Reanalysis data was further used to study the long-term climate change trends in Australian fire weather conditions. A general positive trend in the number of extreme FFDI days was reported across Australia, except for New South Wales in Spring where a statistically non-significant negative trend was observed. Temperature and relative humidity were found to be the most critical climatic variables influencing fire weather trends across the country, noting that relative humidity is partly based on temperature. The applications of this work range from being useful for various stakeholders in framing new climate change adaptation policies to being used for seasonal outlooks and planning by fire management teams.
- Description: Doctor of Philosophy
- Authors: Biswas, Soubhik
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: In the wake of increasing bushfire impacts in recent decades across the Australian landscape, questions arise regarding the role played by weather conditions, climate variability and long-term climate change. This thesis seeks to quantify the following components that can influence fire risk: (1) the effects of weather and mean climate conditions, (2) large-scale drivers of natural climate variability, (3) the influence of extreme weather events and (4) the contribution of long-term anthropogenic climate change. Bushfire risks associated with weather and climate factors in Australia are generally assessed using indices such as the Forest Fire Danger Index (FFDI). The FFDI is used in this study, calculated from daily values of rainfall, relative humidity, temperature and wind speed, providing a generalised approach for combining those four weather factors known to influence fire behaviour. This study also aims to fill several knowledge gaps in the literature. For example, a comprehensive study of climatology, variability and trends in Australia's fire weather conditions was never attempted before using a high-resolution and a very long-term fire weather dataset. The fire weather conditions were analysed using a long-term FFDI dataset constructed from 20th Century reanalysis climatic data with bias correction applied because reconstructed weather datasets like 20th Century reanalysis products often show systemic biases. Various statistical bias correction approaches based on quantile-quantile matching were compared, and a spline-based method was selected due to its higher precision in correcting a distribution for the purposes of this study. The relationship of this calibrated FFDI dataset with the climate drivers of El Niño-Southern Oscillation (ENSO), Indian Ocean Dipole (IOD), Southern Annular Mode (SAM) and Interdecadal Pacific Oscillation (IPO) was analysed. Results are mapped to show the regional and seasonal fluctuations in the severe fire weather across Australia during different combinations of ENSO, IOD, and SAM phases. During the austral spring and summer seasons, the highest frequency of severe fire weather conditions occurred for the combination of positive ENSO (i.e., El Nino), positive IOD and negative SAM. The calibrated FFDI dataset derived from bias-corrected Twentieth Century Reanalysis data was further used to study the long-term climate change trends in Australian fire weather conditions. A general positive trend in the number of extreme FFDI days was reported across Australia, except for New South Wales in Spring where a statistically non-significant negative trend was observed. Temperature and relative humidity were found to be the most critical climatic variables influencing fire weather trends across the country, noting that relative humidity is partly based on temperature. The applications of this work range from being useful for various stakeholders in framing new climate change adaptation policies to being used for seasonal outlooks and planning by fire management teams.
- Description: Doctor of Philosophy