Beyond the natural : perceptions of spirituality and spiritual nurturing in volunteer pastoral care workers in christian ministry : implications for training
- Job, Kay
- Authors: Job, Kay
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Practical and evidence-based research is scarce regarding the perceptions of spirituality and spiritual nurturing of volunteer pastoral care workers. This study set out to explore perceptions of spirituality and spiritual nurturing of volunteer pastoral care workers in a Christian ministry. The aim was to identify what influence their spirituality had on ministry, whether there were links between spiritual experiences, spiritual nurturing and spiritual growth and to develop relevant recommendations to improve training and praxis within the field of pastoral care, an area of increasing interest and demand within the Christian tradition. Thirty participants from an interdenominational volunteer ministry in the Christian tradition, Victorious Ministry Through Christ (VMTC), were interviewed and data were analysed using principles of Grounded Theory to inform subjective spiritual experiences and discover themes regarding spiritual awareness, sensitivity, and effective practice. There were strong indications that a totally dependent, reciprocal relationship exists between spirituality and the ability to minister, suggesting a negation of ability could occur by an absence, unawareness of, or disengagement from the existence of a spiritual dimension. The extent to which an individual was able to effectively and sensitively offer pastoral care was dependent on the degree to which properties of Substantive Spirituality were appropriated, demonstrated through strands of spiritual Sensibility, capacity for Reciprocity, and response to Modification, which combined to form Integrative Spiritual Function (ISF). ISF supported mature functioning of the individual personally, was pre-eminent to formation and effective ministry, and integrative for the whole person. ISF also informed the development of SIFTable; an example of an appraisal tool for use in pastoral care contexts to gauge competency. Recommendations regarding thoughtful and appropriate training of volunteer pastoral care personnel may assist in the formative process associated with ministry to ensure a holistic response to pastoral needs of the volunteer, and the recipient of ministry.
- Description: Doctor of Philosophy
- Authors: Job, Kay
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Practical and evidence-based research is scarce regarding the perceptions of spirituality and spiritual nurturing of volunteer pastoral care workers. This study set out to explore perceptions of spirituality and spiritual nurturing of volunteer pastoral care workers in a Christian ministry. The aim was to identify what influence their spirituality had on ministry, whether there were links between spiritual experiences, spiritual nurturing and spiritual growth and to develop relevant recommendations to improve training and praxis within the field of pastoral care, an area of increasing interest and demand within the Christian tradition. Thirty participants from an interdenominational volunteer ministry in the Christian tradition, Victorious Ministry Through Christ (VMTC), were interviewed and data were analysed using principles of Grounded Theory to inform subjective spiritual experiences and discover themes regarding spiritual awareness, sensitivity, and effective practice. There were strong indications that a totally dependent, reciprocal relationship exists between spirituality and the ability to minister, suggesting a negation of ability could occur by an absence, unawareness of, or disengagement from the existence of a spiritual dimension. The extent to which an individual was able to effectively and sensitively offer pastoral care was dependent on the degree to which properties of Substantive Spirituality were appropriated, demonstrated through strands of spiritual Sensibility, capacity for Reciprocity, and response to Modification, which combined to form Integrative Spiritual Function (ISF). ISF supported mature functioning of the individual personally, was pre-eminent to formation and effective ministry, and integrative for the whole person. ISF also informed the development of SIFTable; an example of an appraisal tool for use in pastoral care contexts to gauge competency. Recommendations regarding thoughtful and appropriate training of volunteer pastoral care personnel may assist in the formative process associated with ministry to ensure a holistic response to pastoral needs of the volunteer, and the recipient of ministry.
- Description: Doctor of Philosophy
Beyond the princess, the priestess and the galactic kitchen sink: Reformulation of feminine roles in certain work of Lois McMaster Bujold
- Authors: Herington, Caitlin
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: In this thesis I examine the Science Fiction and Fantasy works of Lois McMaster Bujold in the Vorkosigan Series and Chalion Series, in particular the way she reformulates women’s roles and identities in society through the characters presented in these novels. I use the term Speculative Fiction as an umbrella term that encompasses both Science Fiction and Fantasy as modes of speculation, in that they both rely on extrapolation and estrangement as narrative features. My main proposition is that Bujold is an important transitional figure in speculative fiction between second and third wave feminist thinking. Although her work mimics some distinctive features of speculative fiction that utilise patriarchal structures and traditional gender norms, it is not limited by them. As a result, Bujold conveys a more complex and insightful understanding of gender. The research method of this thesis is the close reading of a range of sample texts from Bujold’s Vorkosigan Series and Chalion Series which feature female protagonists. I seek to explore the discussion of gender relations and reformulation that occurs within them in the context of both speculative and feminist criticism. Bujold’s exploration of the identities and social roles of women in these fictional worlds is complex and challenging, using a range of approaches from simple reversal, to hybridity of gender, to more complex partial positions. This thesis argues that she takes an implicitly feminist approach, focussing on female experiences and examining the modes of social control and exercise of power within patriarchal social structures as they impact on women. Science Fiction and Fantasy often seem to reiterate traditional patriarchal hierarchies. Validating gender norms that conform to social expectations rather than challenging them. Bujold is presented in this thesis as utilising established norms and tropes such that her texts are easily identified as examples of Science Fiction and Fantasy, but in other ways her reformulations present radical challenges to cultural expectations of gender. This thesis reveals that social critique and reformulation of gender roles is possible and powerful in both Science Fiction and Fantasy by examining the work of a significant author whose work has lacked critical attention until recently. Although numerous studies have examined the way gender has been treated in Science Fiction and Fantasy, the unique contribution of this thesis is to examine an author previously under-studied and to consider the patterns of these reformulations as expressed in Bujold’s works.
- Description: Doctor of Philosophy
- Authors: Herington, Caitlin
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: In this thesis I examine the Science Fiction and Fantasy works of Lois McMaster Bujold in the Vorkosigan Series and Chalion Series, in particular the way she reformulates women’s roles and identities in society through the characters presented in these novels. I use the term Speculative Fiction as an umbrella term that encompasses both Science Fiction and Fantasy as modes of speculation, in that they both rely on extrapolation and estrangement as narrative features. My main proposition is that Bujold is an important transitional figure in speculative fiction between second and third wave feminist thinking. Although her work mimics some distinctive features of speculative fiction that utilise patriarchal structures and traditional gender norms, it is not limited by them. As a result, Bujold conveys a more complex and insightful understanding of gender. The research method of this thesis is the close reading of a range of sample texts from Bujold’s Vorkosigan Series and Chalion Series which feature female protagonists. I seek to explore the discussion of gender relations and reformulation that occurs within them in the context of both speculative and feminist criticism. Bujold’s exploration of the identities and social roles of women in these fictional worlds is complex and challenging, using a range of approaches from simple reversal, to hybridity of gender, to more complex partial positions. This thesis argues that she takes an implicitly feminist approach, focussing on female experiences and examining the modes of social control and exercise of power within patriarchal social structures as they impact on women. Science Fiction and Fantasy often seem to reiterate traditional patriarchal hierarchies. Validating gender norms that conform to social expectations rather than challenging them. Bujold is presented in this thesis as utilising established norms and tropes such that her texts are easily identified as examples of Science Fiction and Fantasy, but in other ways her reformulations present radical challenges to cultural expectations of gender. This thesis reveals that social critique and reformulation of gender roles is possible and powerful in both Science Fiction and Fantasy by examining the work of a significant author whose work has lacked critical attention until recently. Although numerous studies have examined the way gender has been treated in Science Fiction and Fantasy, the unique contribution of this thesis is to examine an author previously under-studied and to consider the patterns of these reformulations as expressed in Bujold’s works.
- 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
Biomechanical assessment of elderly amputees after gait re-education
- Authors: Hubbard, Wendy
- Date: 1992
- Type: Text , Thesis , Masters
- Full Text:
- Description: Length of stay in hospital post-amputation for elderly amputees gait trained using the whole method of re-education at the Queen Elizabeth Geriatric Centre is shorted than is usual in other parts of Australia. There was a need to investigate the gait quality and functional ability of these amputees to asses the adequacy of their post-rebhabilation gait, and to establish a benchmark against which to measure alternative treatment outcomes.
- Authors: Hubbard, Wendy
- Date: 1992
- Type: Text , Thesis , Masters
- Full Text:
- Description: Length of stay in hospital post-amputation for elderly amputees gait trained using the whole method of re-education at the Queen Elizabeth Geriatric Centre is shorted than is usual in other parts of Australia. There was a need to investigate the gait quality and functional ability of these amputees to asses the adequacy of their post-rebhabilation gait, and to establish a benchmark against which to measure alternative treatment outcomes.
Biopsychosocial Data Analytics and Modeling
- Authors: Santhanagopalan, Meena
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Sustained customisation of digital health intervention (DHI) programs, in the context of community health engagement, requires strong integration of multi-sourced interdisciplinary biopsychosocial health data. The biopsychosocial model is built upon the idea that biological, psychological and social processes are integrally and interactively involved in physical health and illness. One of the longstanding challenges of dealing with healthcare data is the wide variety of data generated from different sources and the increasing need to learn actionable insights that drive performance improvement. The growth of information and communication technology has led to the increased use of DHI programs. These programs use an observational methodology that helps researchers to study the everyday behaviour of participants during the course of the program by analysing data generated from digital tools such as wearables, online surveys and ecological momentary assessment (EMA). Combined with data reported from biological and psychological tests, this provides rich and unique biopsychosocial data. There is a strong need to review and apply novel approaches to combining biopsychosocial data from a methodological perspective. Although some studies have used data analytics in research on clinical trial data generated from digital interventions, data analytics on biopsychosocial data generated from DHI programs is limited. The study in this thesis develops and implements innovative approaches for analysing the existing unique and rich biopsychosocial data generated from the wellness study, a DHI program conducted by the School of Science, Psychology and Sport at Federation University. The characteristics of variety, value and veracity that usually describe big data are also relevant to the biopsychosocial data handled in this thesis. These historical, retrospective real-life biopsychosocial data provide fertile ground for research through the use of data analytics to discover patterns hidden in the data and to obtain new knowledge. This thesis presents the studies carried out on three aspects of biopsychosocial research. First, we present the salient traits of the three components - biological, psychological and social - of biopsychosocial research. Next, we investigate the challenges of pre-processing biopsychosocial data, placing special emphasis on the time-series data generated from wearable sensor devices. Finally, we present the application of statistical and machine learning (ML) tools to integrate variables from the biopsychosocial disciplines to build a predictive model. The first chapter presents the salient features of the biopsychosocial data for each discipline. The second chapter presents the challenges of pre-processing biopsychosocial data, focusing on the time-series data generated from wearable sensor devices. The third chapter uses statistical and ML tools to integrate variables from the biopsychosocial disciplines to build a predictive model. Among its other important analyses and results, the key contributions of the research described in this thesis include the following: 1. using gamma distribution to model neurocognitive reaction time data that presents interesting properties (skewness and kurtosis for the data distribution) 2. using novel ‘peak heart-rate’ count metric to quantify ‘biological’ stress 3. using the ML approach to evaluate DHIs 4. using a recurrent neural network (RNN) and long short-term memory (LSTM) data prediction model to predict Difficulties in Emotion Regulation Scale (DERS) and primary emotion (PE) using wearable sensor data.
- Description: Doctor of Philosophy
- Authors: Santhanagopalan, Meena
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Sustained customisation of digital health intervention (DHI) programs, in the context of community health engagement, requires strong integration of multi-sourced interdisciplinary biopsychosocial health data. The biopsychosocial model is built upon the idea that biological, psychological and social processes are integrally and interactively involved in physical health and illness. One of the longstanding challenges of dealing with healthcare data is the wide variety of data generated from different sources and the increasing need to learn actionable insights that drive performance improvement. The growth of information and communication technology has led to the increased use of DHI programs. These programs use an observational methodology that helps researchers to study the everyday behaviour of participants during the course of the program by analysing data generated from digital tools such as wearables, online surveys and ecological momentary assessment (EMA). Combined with data reported from biological and psychological tests, this provides rich and unique biopsychosocial data. There is a strong need to review and apply novel approaches to combining biopsychosocial data from a methodological perspective. Although some studies have used data analytics in research on clinical trial data generated from digital interventions, data analytics on biopsychosocial data generated from DHI programs is limited. The study in this thesis develops and implements innovative approaches for analysing the existing unique and rich biopsychosocial data generated from the wellness study, a DHI program conducted by the School of Science, Psychology and Sport at Federation University. The characteristics of variety, value and veracity that usually describe big data are also relevant to the biopsychosocial data handled in this thesis. These historical, retrospective real-life biopsychosocial data provide fertile ground for research through the use of data analytics to discover patterns hidden in the data and to obtain new knowledge. This thesis presents the studies carried out on three aspects of biopsychosocial research. First, we present the salient traits of the three components - biological, psychological and social - of biopsychosocial research. Next, we investigate the challenges of pre-processing biopsychosocial data, placing special emphasis on the time-series data generated from wearable sensor devices. Finally, we present the application of statistical and machine learning (ML) tools to integrate variables from the biopsychosocial disciplines to build a predictive model. The first chapter presents the salient features of the biopsychosocial data for each discipline. The second chapter presents the challenges of pre-processing biopsychosocial data, focusing on the time-series data generated from wearable sensor devices. The third chapter uses statistical and ML tools to integrate variables from the biopsychosocial disciplines to build a predictive model. Among its other important analyses and results, the key contributions of the research described in this thesis include the following: 1. using gamma distribution to model neurocognitive reaction time data that presents interesting properties (skewness and kurtosis for the data distribution) 2. using novel ‘peak heart-rate’ count metric to quantify ‘biological’ stress 3. using the ML approach to evaluate DHIs 4. using a recurrent neural network (RNN) and long short-term memory (LSTM) data prediction model to predict Difficulties in Emotion Regulation Scale (DERS) and primary emotion (PE) using wearable sensor data.
- Description: Doctor of Philosophy
Bitcoin : users’ characteristics, motivations and investment behaviours
- Authors: Carter, Corey
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: In less than a decade, the cryptocurrency known as Bitcoin has gone from a fringe phenomenon to a topic of increasing interest to academia and mainstream investors. However, despite the growing body of research seeking to understand Bitcoin, the pseudonymous, decentralised, and globally-diffused nature of its user base means that the individuals who use it remain poorly understood. In particular, the motivations, risk-appreciation, and investment behaviours of early adopters and innovators are subject to supposition in the absence of data derived from the user base. This thesis seeks to address this gap in knowledge by employing a multi-stage, mixed methodology approach and a theoretical framework to understand the Bitcoin user base. Utilising semantic analysis, a survey of online cryptocurrency communities, and econometric time-series analysis, this thesis addresses the extent and nature of Bitcoin in hedging; how individual users perceive their own motivations, uses, and risks that have driven their behaviour; and the nature of the relationship between the prices of cryptocurrency and indices of confidence. Analysis of the data determined that the use of Bitcoin as an instrument of hedging is limited, and influenced by political and institutional factors. Likewise, its motivations, uses, and risks are reflective of the users’ political ideology, with the community and marketplace becoming more sophisticated as they evolve over time. Additionally, despite several case studies demonstrating risk-averse adoption of Bitcoin, there is no relationship between its prices and confidence.
- Description: Doctor of Philosophy
- Authors: Carter, Corey
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: In less than a decade, the cryptocurrency known as Bitcoin has gone from a fringe phenomenon to a topic of increasing interest to academia and mainstream investors. However, despite the growing body of research seeking to understand Bitcoin, the pseudonymous, decentralised, and globally-diffused nature of its user base means that the individuals who use it remain poorly understood. In particular, the motivations, risk-appreciation, and investment behaviours of early adopters and innovators are subject to supposition in the absence of data derived from the user base. This thesis seeks to address this gap in knowledge by employing a multi-stage, mixed methodology approach and a theoretical framework to understand the Bitcoin user base. Utilising semantic analysis, a survey of online cryptocurrency communities, and econometric time-series analysis, this thesis addresses the extent and nature of Bitcoin in hedging; how individual users perceive their own motivations, uses, and risks that have driven their behaviour; and the nature of the relationship between the prices of cryptocurrency and indices of confidence. Analysis of the data determined that the use of Bitcoin as an instrument of hedging is limited, and influenced by political and institutional factors. Likewise, its motivations, uses, and risks are reflective of the users’ political ideology, with the community and marketplace becoming more sophisticated as they evolve over time. Additionally, despite several case studies demonstrating risk-averse adoption of Bitcoin, there is no relationship between its prices and confidence.
- Description: Doctor of Philosophy
Black gold : A history of the role of Aboriginal people on the goldfields of Victoria, 1850-70
- Authors: Cahir, David (Fred)
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: Reconstructs the history of Aboriginal people and gold mining in Victoria from 1850-1870.
- Description: Doctor of Philosophy
- Authors: Cahir, David (Fred)
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: Reconstructs the history of Aboriginal people and gold mining in Victoria from 1850-1870.
- Description: Doctor of Philosophy
Breaking the safety barrier : engineering new paradigms in safety design
- Authors: Culvenor, John
- Date: 1997
- Type: Text , Thesis , PhD
- Full Text:
- Description: Occupational health and safety legislation in Australia and internationally is based on the safe place concept and the hierarchy of control. A safe place is best achieved at the design stage and consequently the education of engineers in safety has been a priority. There have been notable efforts at the integration of safety with engineering studies, and this should be an ongoing objective, however extensive integration is likely to be difficult at least in the short term. The challenge was to develop a supplemental, innovative way to improve the ability of engineers to develop safe place solutions. The hypothesis was that training in creative thinking would achieve this aim. The hierarchy of control methodology shares a strong relationship with creative thinking. Safe place thinking challenges assumptions in the same way that creative thinking seeks to escape dominant paradigms. For this reason creative thinking seems a natural aid to the safe place approach. This study tested the effect on safety design of a creative thinking program; de Bono’s six thinking hats method. Given a recognition that groups other than engineers impact on workplace design, a range of subjects were included; engineering students, technology students, industry safety advisers, and government safety advisers. In response to safety case studies, subjects were required to generate solutions and to prioritize potential solutions. Subjects worked on a range of problems, some individually and some in teams of three. Results show that training in creative thinking improved the generation of solutions to safety problems. As the number of solutions increased, the average quality of ideas was maintained, therefore the increased number of solutions was accompanied by a similar increase in good quality safe place solutions. The results also showed in some instances the training improved the prioritization of solutions according to the safe place methodology. The effects were of a similar magnitude for individuals and teams. Creative thinking training was shown to be a useful way to enhance the generation of safe place solutions to safety problems. Given that creative thinking skills can theoretically be applied to any area of problem solving, the enhancement of these skills are likely to yield wider benefits. Furthermore the enhancement of creative thinking accords well with the current industrial mandates for improved innovation.
- Description: Doctor of Philosophy
- Authors: Culvenor, John
- Date: 1997
- Type: Text , Thesis , PhD
- Full Text:
- Description: Occupational health and safety legislation in Australia and internationally is based on the safe place concept and the hierarchy of control. A safe place is best achieved at the design stage and consequently the education of engineers in safety has been a priority. There have been notable efforts at the integration of safety with engineering studies, and this should be an ongoing objective, however extensive integration is likely to be difficult at least in the short term. The challenge was to develop a supplemental, innovative way to improve the ability of engineers to develop safe place solutions. The hypothesis was that training in creative thinking would achieve this aim. The hierarchy of control methodology shares a strong relationship with creative thinking. Safe place thinking challenges assumptions in the same way that creative thinking seeks to escape dominant paradigms. For this reason creative thinking seems a natural aid to the safe place approach. This study tested the effect on safety design of a creative thinking program; de Bono’s six thinking hats method. Given a recognition that groups other than engineers impact on workplace design, a range of subjects were included; engineering students, technology students, industry safety advisers, and government safety advisers. In response to safety case studies, subjects were required to generate solutions and to prioritize potential solutions. Subjects worked on a range of problems, some individually and some in teams of three. Results show that training in creative thinking improved the generation of solutions to safety problems. As the number of solutions increased, the average quality of ideas was maintained, therefore the increased number of solutions was accompanied by a similar increase in good quality safe place solutions. The results also showed in some instances the training improved the prioritization of solutions according to the safe place methodology. The effects were of a similar magnitude for individuals and teams. Creative thinking training was shown to be a useful way to enhance the generation of safe place solutions to safety problems. Given that creative thinking skills can theoretically be applied to any area of problem solving, the enhancement of these skills are likely to yield wider benefits. Furthermore the enhancement of creative thinking accords well with the current industrial mandates for improved innovation.
- Description: Doctor of Philosophy
Broadening the concept of school: how a re-configuration of school must be inclusive of students who are "put at" a disadvantage
- Authors: Peters, Edward (Keith)
- Date: 2013
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis critically examines how students enrolled in state-funded schools can be ‘put at’ a disadvantage. I do this through examining two techniques of exclusion that stimulate student disconnection from school: first, the ways in which standards-based and performativity-driven learning outcomes are implemented to shape how student success is determined. Secondly, I examine how discourses around power control curriculum and student identity instil monological learning structures that normalises standards-based learning outcomes. Challenging this, I allow the voices of my co-researchers, the students in my thesis, to speak back to confront these school-based policies that allow disconnection to occur. Examining school policy and student voice at the point where they intersect allowed me to undertake an evaluation of how schools adversely affect students, and what students say they want from their experience of schooling. The final theme I develop is based on student and agency worker voice and what they say school-based learning should become. Relational learning and learning that develops students ethically emerged as fundamental strengths of what enriching learning transactions should look like. I argue that creating relational learning spaces develop challenging environments that can lead students to ethically understand their identity within complex social and cultural lifestyles. I argue that the ways in which schools are organised to administer time and space must be radically overhauled if this is to be achieved.
- Description: Doctor of Philosophy
- Authors: Peters, Edward (Keith)
- Date: 2013
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis critically examines how students enrolled in state-funded schools can be ‘put at’ a disadvantage. I do this through examining two techniques of exclusion that stimulate student disconnection from school: first, the ways in which standards-based and performativity-driven learning outcomes are implemented to shape how student success is determined. Secondly, I examine how discourses around power control curriculum and student identity instil monological learning structures that normalises standards-based learning outcomes. Challenging this, I allow the voices of my co-researchers, the students in my thesis, to speak back to confront these school-based policies that allow disconnection to occur. Examining school policy and student voice at the point where they intersect allowed me to undertake an evaluation of how schools adversely affect students, and what students say they want from their experience of schooling. The final theme I develop is based on student and agency worker voice and what they say school-based learning should become. Relational learning and learning that develops students ethically emerged as fundamental strengths of what enriching learning transactions should look like. I argue that creating relational learning spaces develop challenging environments that can lead students to ethically understand their identity within complex social and cultural lifestyles. I argue that the ways in which schools are organised to administer time and space must be radically overhauled if this is to be achieved.
- Description: Doctor of Philosophy
Building an understanding of the development of OHS management in small business in the Victorian construction industry
- Authors: Leggett, Susan
- Date: 2009
- Type: Text , Thesis , PhD
- Full Text:
- Description: "Small businesses are regularly perceived to be poor performers in OHS management. However, attributing poor performance soley to size, to the hazardous nature of the industry or to a simplistic combination of both aspects neglects the recognition that there are some small businesses that can manage OHS with greater capacity than others."
- Description: Doctor of Philosophy
- Authors: Leggett, Susan
- Date: 2009
- Type: Text , Thesis , PhD
- Full Text:
- Description: "Small businesses are regularly perceived to be poor performers in OHS management. However, attributing poor performance soley to size, to the hazardous nature of the industry or to a simplistic combination of both aspects neglects the recognition that there are some small businesses that can manage OHS with greater capacity than others."
- Description: Doctor of Philosophy
Building social capital through the delivery of outdoor education at Victorian government schools
- Authors: Keeble, Tony
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis describes an explanatory sequential mixed-methods research project that investigated the changes to student social capital indicators resulting from an outdoor educational program, Future Maker, delivered to Victorian government school students. A systematic review of literature found minimal evidence of research relating to the change to social capital indicators as a result of programs that deliver outdoor education curriculum. The initial chapters of this thesis explore research on outdoor residential schools and the development of the Future Maker program as an alternative form of outdoor education curriculum design. Quantitative data were gathered from 287 students in the form of the Life Effectiveness Questionnaire (LEQ), over a 12-month period. Students completed the LEQ on three separate occasions: Day 1 of the program, Day 12 of the program, and 6 months after the program. Furthermore, qualitative data were gathered using a semistructured interview process. Twenty-eight students and seven teachers were randomly selected from participating schools to partake in the interviews. The final sections of the thesis present and discuss the findings from the quantitative and qualitative data that provided sufficient evidence that showed a significant increase in effect size for the social capital indicators of communication, relationships, group processing, networking and leadership. Furthermore, the research indicated that the domestic chores undertaken by students on an outdoor education program contributed to how social capital is learnt in an outdoor educational context. Moreover, the research positions outdoor education as a subject with content and pedagogy rather than a discipline and argues that outdoor education as a standalone subject has been sitting in plain sight. Finally, it concluded that a purpose-designed outdoor education program, which is built using a framework for curriculum development, can develop positive indicators for social capital.
- Description: Doctor of Philosophy
- Authors: Keeble, Tony
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis describes an explanatory sequential mixed-methods research project that investigated the changes to student social capital indicators resulting from an outdoor educational program, Future Maker, delivered to Victorian government school students. A systematic review of literature found minimal evidence of research relating to the change to social capital indicators as a result of programs that deliver outdoor education curriculum. The initial chapters of this thesis explore research on outdoor residential schools and the development of the Future Maker program as an alternative form of outdoor education curriculum design. Quantitative data were gathered from 287 students in the form of the Life Effectiveness Questionnaire (LEQ), over a 12-month period. Students completed the LEQ on three separate occasions: Day 1 of the program, Day 12 of the program, and 6 months after the program. Furthermore, qualitative data were gathered using a semistructured interview process. Twenty-eight students and seven teachers were randomly selected from participating schools to partake in the interviews. The final sections of the thesis present and discuss the findings from the quantitative and qualitative data that provided sufficient evidence that showed a significant increase in effect size for the social capital indicators of communication, relationships, group processing, networking and leadership. Furthermore, the research indicated that the domestic chores undertaken by students on an outdoor education program contributed to how social capital is learnt in an outdoor educational context. Moreover, the research positions outdoor education as a subject with content and pedagogy rather than a discipline and argues that outdoor education as a standalone subject has been sitting in plain sight. Finally, it concluded that a purpose-designed outdoor education program, which is built using a framework for curriculum development, can develop positive indicators for social capital.
- Description: Doctor of Philosophy
Cadmium and human prostatic carcinoma : a study of the analytical procedures for the determination of cadmium and zinc in human prostatic tissue, and the investigation of an association between the incidence of prosatatic adencarcinoma and the occurrence of prostatic cadmium
- Authors: Moran, Robert
- Date: 1994
- Type: Text , Thesis , Masters
- Full Text: false
- Description: The concentrations of the heavy metals cadmium and zinc in both benign nodular hyperplastic and malignant (adenocarcinoma) human prostatic tissue obtained from Trans Urethral Resections of the Prostate (TURP) have been investigated. Healthy normal human prostates obtained from post mortem cadavers were used as controls. The change in the prostatic cadmium concentration with age was investigated. Renal cortex cadmium and zinc concentration changes with age together with the metal concentration intterelationships between prostatic and renal cortex tissues were studied. "From abstract"
- Description: Master of Applied Science
- Authors: Moran, Robert
- Date: 1994
- Type: Text , Thesis , Masters
- Full Text: false
- Description: The concentrations of the heavy metals cadmium and zinc in both benign nodular hyperplastic and malignant (adenocarcinoma) human prostatic tissue obtained from Trans Urethral Resections of the Prostate (TURP) have been investigated. Healthy normal human prostates obtained from post mortem cadavers were used as controls. The change in the prostatic cadmium concentration with age was investigated. Renal cortex cadmium and zinc concentration changes with age together with the metal concentration intterelationships between prostatic and renal cortex tissues were studied. "From abstract"
- Description: Master of Applied Science
Canonical Dual Algorithms for Global Optimization with Applications
- Authors: Zhou, Xiaojun
- Date: 2014
- Type: Text , Thesis
- Full Text:
- Description: Canonical duality theory provides a unified framework which can transform a nonconvex primal minimization problem to a canonical dual maximization problem over a convex domain without duality gap. But the global optimality is guaranteed by a certain positive definite condition and such condition is not always satisfied. The goal of this thesis aims to explore possible techniques that can be used to solve global optimization problems based on the canonical duality theory. Firstly, an algorithmic framework for canonical duality theory is established, which shows that the canonical dual algorithms can be developed in four aspects under the positive definite condition explicitly or implicitly, namely, (i) minimizing the primal problem, (ii) maximizing the canonical dual problem, (iii) solving a nonlinear equation caused by total complementary function, and (iv) solving a nonlinear equation caused by canonical dual function. Secondly, we show that if there exists a critical point of the canonical dual problem in the positive definite domain, by solving an equivalent semidefinite programming (SDP) problem, the corresponding global solution to the primal problem can be obtained easily via off-the-shelf software packages. A specific canonical dual algorithm is given for each problem, including sum of fourth-order polynomials minimization, nonconvex quadratically constrained quadratic program (QCQP), and boolean quadratic program (BQP). Thirdly, we propose a canonical primal-dual algorithm framework based on the total complementary function. Convergence analysis is discussed from the perspective of variational inequalities (VIs) and contraction methods. Specific canonical primal-dual algorithms for sum of fourth-order polynomials minimization is given as well. And a real-world application to the sensor network localization problem is illustrated. Next, a canonical sequential reduction approach is proposed to recover the approximate or global solution for the BQP problem. By fixing some previously known components, the original problem can be reduced sequentially to a lower dimension one. This approach is successfully applied to the well-known maxcut problem. Finally, we discuss the canonical dual approach applied to continuous time constrained optimal control. And it shows that the optimal control law for the n-dimensional constrained linear quadratic regulator can be achieved precisely via one-dimensional canonical dual variable, and for the optimal control problem with concave cost functional, an approximate solution can be obtained by introducing a linear perturbation term.
- Description: PhD
- Authors: Zhou, Xiaojun
- Date: 2014
- Type: Text , Thesis
- Full Text:
- Description: Canonical duality theory provides a unified framework which can transform a nonconvex primal minimization problem to a canonical dual maximization problem over a convex domain without duality gap. But the global optimality is guaranteed by a certain positive definite condition and such condition is not always satisfied. The goal of this thesis aims to explore possible techniques that can be used to solve global optimization problems based on the canonical duality theory. Firstly, an algorithmic framework for canonical duality theory is established, which shows that the canonical dual algorithms can be developed in four aspects under the positive definite condition explicitly or implicitly, namely, (i) minimizing the primal problem, (ii) maximizing the canonical dual problem, (iii) solving a nonlinear equation caused by total complementary function, and (iv) solving a nonlinear equation caused by canonical dual function. Secondly, we show that if there exists a critical point of the canonical dual problem in the positive definite domain, by solving an equivalent semidefinite programming (SDP) problem, the corresponding global solution to the primal problem can be obtained easily via off-the-shelf software packages. A specific canonical dual algorithm is given for each problem, including sum of fourth-order polynomials minimization, nonconvex quadratically constrained quadratic program (QCQP), and boolean quadratic program (BQP). Thirdly, we propose a canonical primal-dual algorithm framework based on the total complementary function. Convergence analysis is discussed from the perspective of variational inequalities (VIs) and contraction methods. Specific canonical primal-dual algorithms for sum of fourth-order polynomials minimization is given as well. And a real-world application to the sensor network localization problem is illustrated. Next, a canonical sequential reduction approach is proposed to recover the approximate or global solution for the BQP problem. By fixing some previously known components, the original problem can be reduced sequentially to a lower dimension one. This approach is successfully applied to the well-known maxcut problem. Finally, we discuss the canonical dual approach applied to continuous time constrained optimal control. And it shows that the optimal control law for the n-dimensional constrained linear quadratic regulator can be achieved precisely via one-dimensional canonical dual variable, and for the optimal control problem with concave cost functional, an approximate solution can be obtained by introducing a linear perturbation term.
- Description: PhD
Canonical dual finite element method for solving nonconvex mechanics and topology optimization
- Authors: Ali, Elaf
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Canonical duality theory (CDT) is a newly developed, potentially powerful methodological theory which can transfer general multi-scale nonconvex/discrete problems in Rn to a unified convex dual problem in continuous space Rm with m n and without a duality gap. The associated triality theory provides extremality criteria for both global and local optimal solutions, which can be used to develop powerful algorithms for solving general nonconvex variational problems. This thesis, first, presents a detailed study of large deformation problems in 2-D structural system. Based on the canonical duality theory, a canonical dual finite element method is applied to find a global minimization to the general nonconvex optimization problem using a new primal-dual semi-definite programming algorithm. Applications are illustrated by numerical examples with different structural designs and different external loads. Next, a new methodology and algorithm for solving post buckling problems of a large deformed elastic beam is investigated. The total potential energy of this beam is a nonconvex functional, which can be used to model both pre- and post-buckling phenomena. By using the canonical dual finite element method, a new primal-dual semi-definite programming algorithm is presented, which can be used to obtain all possible post-buckled solutions. In order to verify the triality theory, mixed meshes of different dual stress interpolation are applied to obtain the closed dimensions between discretized displacement and discretized stress. Applications are illustrated by several numerical examples with different boundary conditions. We find that the global minimum solution of the nonconvex potential leads to the unbuckled state, and both of these two solutions are numerically stable. However, the local minimum solution leads to an unstable buckled state, which is very sensitive to the external load, thickness of the beam, numerical precision, and the size of finite elements. Finally, a mathematically rigorous and computationally powerful method for solving 3-D topology optimization problems is demonstrated. This method is based on CDT developed by Gao in nonconvex mechanics and global optimization. It shows that the so-called NP-hard Knapsack problem in topology optimization can be solved deterministically in polynomial-time via a canonical penalty-duality (CPD) method to obtain precise global optimal 0-1 density distribution at each volume evolution. The relation between this CPD method and Gao's pure complementary energy principle is revealed for the first time. A CPD algorithm is proposed for 3-D topology optimization of linear elastic structures. Its novelty is demonstrated by benchmark problems. Results show that without using any artificial technique, the CPD method can provide mechanically sound optimal design, also it is much more powerful than the well-known BESO and SIMP methods. Finally, computational complexity and conceptual/mathematical mistakes in topology optimization modeling and popular methods are explicitly addressed.
- Description: Doctor of Philosophy
- Description: Canonical duality theory (CDT) is a newly developed, potentially powerful method- ological theory which can transfer general multi-scale nonconvex/discrete problems in Rn to a unified convex dual problem in continuous space Rm with m
- Authors: Ali, Elaf
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Canonical duality theory (CDT) is a newly developed, potentially powerful methodological theory which can transfer general multi-scale nonconvex/discrete problems in Rn to a unified convex dual problem in continuous space Rm with m n and without a duality gap. The associated triality theory provides extremality criteria for both global and local optimal solutions, which can be used to develop powerful algorithms for solving general nonconvex variational problems. This thesis, first, presents a detailed study of large deformation problems in 2-D structural system. Based on the canonical duality theory, a canonical dual finite element method is applied to find a global minimization to the general nonconvex optimization problem using a new primal-dual semi-definite programming algorithm. Applications are illustrated by numerical examples with different structural designs and different external loads. Next, a new methodology and algorithm for solving post buckling problems of a large deformed elastic beam is investigated. The total potential energy of this beam is a nonconvex functional, which can be used to model both pre- and post-buckling phenomena. By using the canonical dual finite element method, a new primal-dual semi-definite programming algorithm is presented, which can be used to obtain all possible post-buckled solutions. In order to verify the triality theory, mixed meshes of different dual stress interpolation are applied to obtain the closed dimensions between discretized displacement and discretized stress. Applications are illustrated by several numerical examples with different boundary conditions. We find that the global minimum solution of the nonconvex potential leads to the unbuckled state, and both of these two solutions are numerically stable. However, the local minimum solution leads to an unstable buckled state, which is very sensitive to the external load, thickness of the beam, numerical precision, and the size of finite elements. Finally, a mathematically rigorous and computationally powerful method for solving 3-D topology optimization problems is demonstrated. This method is based on CDT developed by Gao in nonconvex mechanics and global optimization. It shows that the so-called NP-hard Knapsack problem in topology optimization can be solved deterministically in polynomial-time via a canonical penalty-duality (CPD) method to obtain precise global optimal 0-1 density distribution at each volume evolution. The relation between this CPD method and Gao's pure complementary energy principle is revealed for the first time. A CPD algorithm is proposed for 3-D topology optimization of linear elastic structures. Its novelty is demonstrated by benchmark problems. Results show that without using any artificial technique, the CPD method can provide mechanically sound optimal design, also it is much more powerful than the well-known BESO and SIMP methods. Finally, computational complexity and conceptual/mathematical mistakes in topology optimization modeling and popular methods are explicitly addressed.
- Description: Doctor of Philosophy
- Description: Canonical duality theory (CDT) is a newly developed, potentially powerful method- ological theory which can transfer general multi-scale nonconvex/discrete problems in Rn to a unified convex dual problem in continuous space Rm with m
Canonical Duality Theory for Global Optimization problems and applications
- Chen, Yi
- Authors: Chen, Yi
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: The canonical duality theory is studied, through a discussion on a general global optimization problem and applications on fundamentally important problems. This general problem is a formulation of the minimization problem with inequality constraints, where the objective function and constraints are any convex or nonconvex functions satisfying certain decomposition conditions. It covers convex problems, mixed integer programming problems and many other nonlinear programming problems. The three main parts of the canonical duality theory are canonical dual transformation, complementary-dual principle and triality theory. The complementary-dual principle is further developed, which conventionally states that each critical point of the canonical dual problem is corresponding to a KKT point of the primal problem with their sharing the same function value. The new result emphasizes that there exists a one-to-one correspondence between KKT points of the dual problem and of the primal problem and each pair of the corresponding KKT points share the same function value, which implies that there is truly no duality gap between the canonical dual problem and the primal problem. The triality theory reveals insightful information about global and local solutions. It is shown that as long as the global optimality condition holds true, the primal problem is equivalent to a convex problem in the dual space, which can be solved efficiently by existing convex methods; even if the condition does not hold, the convex problem still provides a lower bound that is at least as good as that by the Lagrangian relaxation method. It is also shown that through examining the canonical dual problem, the hidden convexity of the primal problem is easily observable. The canonical duality theory is then applied to dealing with three fundamentally important problems. The first one is the spherically constrained quadratic problem, also referred to as the trust region subproblem. The canonical dual problem is onedimensional and it is proved that the primal problem, no matter with convex or nonconvex objective function, is equivalent to a convex problem in the dual space. Moreover, conditions are found which comprise the boundary that separates instances into “hard case” and “easy case”. A canonical primal-dual algorithm is developed, which is able to efficiently solve the problem, including the “hard case”, and can be used as a unified method for similar problems. The second one is the binary quadratic problem, a fundamental problem in discrete optimization. The discussion is focused on lower bounds and analytically solvable cases, which are obtained by analyzing the canonical dual problem with perturbation techniques. The third one is a general nonconvex problem with log-sum-exp functions and quartic polynomials. It arises widely in engineering science and it can be used to approximate nonsmooth optimization problems. The work shows that problems can still be efficiently solved, via the canonical duality approach, even if they are nonconvex and nonsmooth.
- Description: Doctor of Philosophy
- Authors: Chen, Yi
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: The canonical duality theory is studied, through a discussion on a general global optimization problem and applications on fundamentally important problems. This general problem is a formulation of the minimization problem with inequality constraints, where the objective function and constraints are any convex or nonconvex functions satisfying certain decomposition conditions. It covers convex problems, mixed integer programming problems and many other nonlinear programming problems. The three main parts of the canonical duality theory are canonical dual transformation, complementary-dual principle and triality theory. The complementary-dual principle is further developed, which conventionally states that each critical point of the canonical dual problem is corresponding to a KKT point of the primal problem with their sharing the same function value. The new result emphasizes that there exists a one-to-one correspondence between KKT points of the dual problem and of the primal problem and each pair of the corresponding KKT points share the same function value, which implies that there is truly no duality gap between the canonical dual problem and the primal problem. The triality theory reveals insightful information about global and local solutions. It is shown that as long as the global optimality condition holds true, the primal problem is equivalent to a convex problem in the dual space, which can be solved efficiently by existing convex methods; even if the condition does not hold, the convex problem still provides a lower bound that is at least as good as that by the Lagrangian relaxation method. It is also shown that through examining the canonical dual problem, the hidden convexity of the primal problem is easily observable. The canonical duality theory is then applied to dealing with three fundamentally important problems. The first one is the spherically constrained quadratic problem, also referred to as the trust region subproblem. The canonical dual problem is onedimensional and it is proved that the primal problem, no matter with convex or nonconvex objective function, is equivalent to a convex problem in the dual space. Moreover, conditions are found which comprise the boundary that separates instances into “hard case” and “easy case”. A canonical primal-dual algorithm is developed, which is able to efficiently solve the problem, including the “hard case”, and can be used as a unified method for similar problems. The second one is the binary quadratic problem, a fundamental problem in discrete optimization. The discussion is focused on lower bounds and analytically solvable cases, which are obtained by analyzing the canonical dual problem with perturbation techniques. The third one is a general nonconvex problem with log-sum-exp functions and quartic polynomials. It arises widely in engineering science and it can be used to approximate nonsmooth optimization problems. The work shows that problems can still be efficiently solved, via the canonical duality approach, even if they are nonconvex and nonsmooth.
- Description: Doctor of Philosophy
Capital budgeting practices and firm performance : A comparative study of Australia and Sri Lanka
- Puwanenthiren, Pratheepkanth
- Authors: Puwanenthiren, Pratheepkanth
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis disentangles two elements from the complex interdependent suite of key drivers of firm sophistication in capital-budgeting. Specifically, the relative sophistication of a firm (i.e. its nature) and the development level of the nation in which a firm is embedded (i.e. the nurture experienced by the firm). This research should enhance the development focus and process of nations (e.g., to what degree should national development be about raising the ability of individual firms or will raising national development act as a rising tide [that] raises all boats). The comparative data used in this study comes from 150 Australian (ASX200-index-listed) firms and 150 Sri Lankan (Colombo-stock-exchange-listed firms). The research questions are answered via a quantitative research design that uses primary and secondary data. The response rate to the questionnaire survey of firms was, 45 and 73 completed questionnaires from, respectively, Australia and Sri Lanka (an effective response rate of, respectively, 31.5 and 48.7 percent). Secondary data for 2003-12 are obtained from the ASX, CSE’s and SIRCA databases and are used to calculate return on assets, return on equity, Tobin Q, and earnings per share for the sampled firms. It was found that Australian firms tend to rely heavily on sophisticated capital-budgeting practices, but Sri Lankan relatively small firms prefer simple analysis methods and the larger firms tend to be as adept at sophisticated capital budgeting as their Australian counterparts. The choice of whether to use more sophisticated practices or simpler alternatives varies with a firm’s attributes as well as the level of economic and financial market development in its environment. Also, Australian firms tend to use capital-budget models with good-to-strong predictive power (except for ROE) and Sri Lankan firms tend to use capital-budget models with fair-to-poor predictive power. Further, the analysis of Australian firms tends to yield stronger and more statistically-significant results, than those generated by Sri Lankan firms.
- Description: Doctor of Philosophy
- Authors: Puwanenthiren, Pratheepkanth
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis disentangles two elements from the complex interdependent suite of key drivers of firm sophistication in capital-budgeting. Specifically, the relative sophistication of a firm (i.e. its nature) and the development level of the nation in which a firm is embedded (i.e. the nurture experienced by the firm). This research should enhance the development focus and process of nations (e.g., to what degree should national development be about raising the ability of individual firms or will raising national development act as a rising tide [that] raises all boats). The comparative data used in this study comes from 150 Australian (ASX200-index-listed) firms and 150 Sri Lankan (Colombo-stock-exchange-listed firms). The research questions are answered via a quantitative research design that uses primary and secondary data. The response rate to the questionnaire survey of firms was, 45 and 73 completed questionnaires from, respectively, Australia and Sri Lanka (an effective response rate of, respectively, 31.5 and 48.7 percent). Secondary data for 2003-12 are obtained from the ASX, CSE’s and SIRCA databases and are used to calculate return on assets, return on equity, Tobin Q, and earnings per share for the sampled firms. It was found that Australian firms tend to rely heavily on sophisticated capital-budgeting practices, but Sri Lankan relatively small firms prefer simple analysis methods and the larger firms tend to be as adept at sophisticated capital budgeting as their Australian counterparts. The choice of whether to use more sophisticated practices or simpler alternatives varies with a firm’s attributes as well as the level of economic and financial market development in its environment. Also, Australian firms tend to use capital-budget models with good-to-strong predictive power (except for ROE) and Sri Lankan firms tend to use capital-budget models with fair-to-poor predictive power. Further, the analysis of Australian firms tends to yield stronger and more statistically-significant results, than those generated by Sri Lankan firms.
- Description: Doctor of Philosophy
Cardiovascular data analytics for real time patient monitoring
- Authors: Allami, Ragheed
- Date: 2017
- Type: Text , Thesis , PhD
- Full Text:
- Description: Improvements in wearable sensor devices make it possible to constantly monitor physiological parameters such as electrocardiograph (ECG) signals for long periods. Remote patient monitoring with wearable sensors has an important role to play in health care, particularly given the prevalence of chronic conditions such as cardiovascular disease (CVD)—one of the prominent causes of morbidity and mortality worldwide. Approximately 4.2 million Australians suffer from long-term CVD with approximately one death every 12 minutes. The assessment of ECG features, especially heart rate variability (HRV), represents a non-invasive technique which provides an indication of the autonomic nervous system (ANS) function. Conditions such as sudden cardiac death, hypertension, heart failure, myocardial infarction, ischaemia, and coronary heart disease can be detected from HRV analysis. In addition, the analysis of ECG features can also be used to diagnose many types of life-threatening arrhythmias, including ventricular fibrillation and ventricular tachycardia. Non-cardiac conditions, such as diabetes, obesity, metabolic syndrome, insulin resistance, irritable bowel syndrome, dyspepsia, anorexia nervosa, anxiety, and major depressive disorder have also been shown to be associated with HRV. The analysis of ECG features from real time ECG signals generated from wearable sensors provides distinctive challenges. The sensors that receive and process the signals have limited power, storage and processing capacity. Consequently, algorithms that process ECG signals need to be lightweight, use minimal storage resources and accurately detect abnormalities so that alarms can be raised. The existing literature details only a few algorithms which operate within the constraints of wearable sensor networks. This research presents four novel techniques that enable ECG signals to be processed within the limitations of resource constraints on devices to detect some key abnormalities in heart function. - The first technique is a novel real-time ECG data reduction algorithm, which detects and transmits only those key points that are critical for the generation of ECG features for diagnoses. - The second technique accurately predicts the five-minute HRV measure using only three minutes of data with an algorithm that executes in real-time using minimal computational resources. - The third technique introduces a real-time ECG feature recognition system that can be applied to diagnose life threatening conditions such as premature ventricular contractions (PVCs). - The fourth technique advances a classification algorithm to enhance the performance of automated ECG classification to determine arrhythmic heart beats based on noisy ECG signals. The four novel techniques are evaluated in comparison with benchmark algorithms for each task on the standard MIT-BIH Arrhythmia Database and with data generated from patients in a major hospital using Shimmer3 wearable ECG sensors. The four techniques are integrated to demonstrate that remote patient monitoring of ECG using HRV and ECG features is feasible in real time using minimal computational resources. The evaluation show that the ECG reduction algorithm is significantly better than existing algorithms that can be applied within sensor nodes, such as time-domain methods, transformation methods and compressed sensing methods. Furthermore, the proposed ECG reduction is found to be computationally less complex for resource constrained sensors and achieves higher compression ratios than existing algorithms. The prediction of a common HRV measure, the five-minute standard deviation of inter-beat variations (SDNN) and the accurate detection of PVC beats was achieved using a Count Data Model, combined with a Poisson-generated function from three-minute ECG recordings. This was achieved with minimal computational resources and was well suited to remote patient monitoring with wearable sensors. The PVC beats detection was implemented using the same count data model together with knowledge-based rules derived from clinical knowledge. A real-time cardiac patient monitoring system was implemented using an ECG sensor and smartphone to detect PVC beats within a few seconds using artificial neural networks (ANN), and it was proven to provide highly accurate results. The automated detection and classification were implemented using a new wrapper-based hybrid approach that utilized t-distributed stochastic neighbour embedding (t-SNE) in combination with self-organizing maps (SOM) to improve classification performance. The t-SNE-SOM hybrid resulted in improved sensitivity, specificity and accuracy compared to most common hybrid methods in the presence of noise. It also provided a better, more accurate identification for the presence of many types of arrhythmias from the ECG recordings, leading to a more timely diagnosis and treatment outcome.
- Description: Doctor of Philosophy
- Authors: Allami, Ragheed
- Date: 2017
- Type: Text , Thesis , PhD
- Full Text:
- Description: Improvements in wearable sensor devices make it possible to constantly monitor physiological parameters such as electrocardiograph (ECG) signals for long periods. Remote patient monitoring with wearable sensors has an important role to play in health care, particularly given the prevalence of chronic conditions such as cardiovascular disease (CVD)—one of the prominent causes of morbidity and mortality worldwide. Approximately 4.2 million Australians suffer from long-term CVD with approximately one death every 12 minutes. The assessment of ECG features, especially heart rate variability (HRV), represents a non-invasive technique which provides an indication of the autonomic nervous system (ANS) function. Conditions such as sudden cardiac death, hypertension, heart failure, myocardial infarction, ischaemia, and coronary heart disease can be detected from HRV analysis. In addition, the analysis of ECG features can also be used to diagnose many types of life-threatening arrhythmias, including ventricular fibrillation and ventricular tachycardia. Non-cardiac conditions, such as diabetes, obesity, metabolic syndrome, insulin resistance, irritable bowel syndrome, dyspepsia, anorexia nervosa, anxiety, and major depressive disorder have also been shown to be associated with HRV. The analysis of ECG features from real time ECG signals generated from wearable sensors provides distinctive challenges. The sensors that receive and process the signals have limited power, storage and processing capacity. Consequently, algorithms that process ECG signals need to be lightweight, use minimal storage resources and accurately detect abnormalities so that alarms can be raised. The existing literature details only a few algorithms which operate within the constraints of wearable sensor networks. This research presents four novel techniques that enable ECG signals to be processed within the limitations of resource constraints on devices to detect some key abnormalities in heart function. - The first technique is a novel real-time ECG data reduction algorithm, which detects and transmits only those key points that are critical for the generation of ECG features for diagnoses. - The second technique accurately predicts the five-minute HRV measure using only three minutes of data with an algorithm that executes in real-time using minimal computational resources. - The third technique introduces a real-time ECG feature recognition system that can be applied to diagnose life threatening conditions such as premature ventricular contractions (PVCs). - The fourth technique advances a classification algorithm to enhance the performance of automated ECG classification to determine arrhythmic heart beats based on noisy ECG signals. The four novel techniques are evaluated in comparison with benchmark algorithms for each task on the standard MIT-BIH Arrhythmia Database and with data generated from patients in a major hospital using Shimmer3 wearable ECG sensors. The four techniques are integrated to demonstrate that remote patient monitoring of ECG using HRV and ECG features is feasible in real time using minimal computational resources. The evaluation show that the ECG reduction algorithm is significantly better than existing algorithms that can be applied within sensor nodes, such as time-domain methods, transformation methods and compressed sensing methods. Furthermore, the proposed ECG reduction is found to be computationally less complex for resource constrained sensors and achieves higher compression ratios than existing algorithms. The prediction of a common HRV measure, the five-minute standard deviation of inter-beat variations (SDNN) and the accurate detection of PVC beats was achieved using a Count Data Model, combined with a Poisson-generated function from three-minute ECG recordings. This was achieved with minimal computational resources and was well suited to remote patient monitoring with wearable sensors. The PVC beats detection was implemented using the same count data model together with knowledge-based rules derived from clinical knowledge. A real-time cardiac patient monitoring system was implemented using an ECG sensor and smartphone to detect PVC beats within a few seconds using artificial neural networks (ANN), and it was proven to provide highly accurate results. The automated detection and classification were implemented using a new wrapper-based hybrid approach that utilized t-distributed stochastic neighbour embedding (t-SNE) in combination with self-organizing maps (SOM) to improve classification performance. The t-SNE-SOM hybrid resulted in improved sensitivity, specificity and accuracy compared to most common hybrid methods in the presence of noise. It also provided a better, more accurate identification for the presence of many types of arrhythmias from the ECG recordings, leading to a more timely diagnosis and treatment outcome.
- Description: Doctor of Philosophy
Care leavers recovering voice and agency through counter-narratives
- Authors: Golding, Frank
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The publications in this thesis discuss recurring issues in the historical context of out-of-home Care (OOHC). They were written for various audiences but are arranged not by date of publication but thematically so as to present a coherent argument about the recovery of voice and agency by those who experienced OOHC. The thesis begins with an Overview which discusses autoethnographic and multi-layered approaches to history and shows how subject matter helps determine the choice of methodology and sources and, in turn, how methodologies influence the selection of sources and shape content. Authorities in Australia have a long history of removing children from their families when they are deemed to be neglected or ‘in moral danger’. Out of the public gaze, these children were often rendered silent, their voices simply unheard or deliberately supressed by the exercise of total institutional power. This thesis analyses how children were marginalised, cast as ‘the other’, and framed as deserving no better than they got. In the aftermath of a series of inquiries into institutional child maltreatment—some of which came about as a result of survivor advocacy and relied heavily on direct testimony—we now better understand children’s institutional experiences. In this changing environment, advocacy groups are effectively challenging the received accounts of historical Care. Their challenge has gained impetus from the opening up of records through rights legislation, especially access to personal case files. Large numbers of Care leavers have found their files inaccurate, incomplete, or misleading, and this discovery has stimulated many to produce compelling counter-narratives of the lived experiences of their childhood, and the living experiences that endure. The thesis concludes with an extended analytical commentary reflecting new interpretations of emerging histories, assessing changes in the status of Care leavers, and identifying directions warranting further development in OOHC.
- Description: Doctor of Philosophy
- Authors: Golding, Frank
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The publications in this thesis discuss recurring issues in the historical context of out-of-home Care (OOHC). They were written for various audiences but are arranged not by date of publication but thematically so as to present a coherent argument about the recovery of voice and agency by those who experienced OOHC. The thesis begins with an Overview which discusses autoethnographic and multi-layered approaches to history and shows how subject matter helps determine the choice of methodology and sources and, in turn, how methodologies influence the selection of sources and shape content. Authorities in Australia have a long history of removing children from their families when they are deemed to be neglected or ‘in moral danger’. Out of the public gaze, these children were often rendered silent, their voices simply unheard or deliberately supressed by the exercise of total institutional power. This thesis analyses how children were marginalised, cast as ‘the other’, and framed as deserving no better than they got. In the aftermath of a series of inquiries into institutional child maltreatment—some of which came about as a result of survivor advocacy and relied heavily on direct testimony—we now better understand children’s institutional experiences. In this changing environment, advocacy groups are effectively challenging the received accounts of historical Care. Their challenge has gained impetus from the opening up of records through rights legislation, especially access to personal case files. Large numbers of Care leavers have found their files inaccurate, incomplete, or misleading, and this discovery has stimulated many to produce compelling counter-narratives of the lived experiences of their childhood, and the living experiences that endure. The thesis concludes with an extended analytical commentary reflecting new interpretations of emerging histories, assessing changes in the status of Care leavers, and identifying directions warranting further development in OOHC.
- Description: Doctor of Philosophy
Casuarina pauper (belah) woodlands of northwest Victoria : monitoring and regeneration
- Authors: Callister, Katrina
- Date: 2004
- Type: Text , Thesis , Masters , PhD
- Full Text:
- Description: "The study focused on C. pauper woodland in northwest Victoria, an area where the recent establishment of the Murray-Sunset National Park (MSNP) provides an ideal opportunity to manage these woodlands to promote regeneration"
- Description: Doctor of Philosophy
- Authors: Callister, Katrina
- Date: 2004
- Type: Text , Thesis , Masters , PhD
- Full Text:
- Description: "The study focused on C. pauper woodland in northwest Victoria, an area where the recent establishment of the Murray-Sunset National Park (MSNP) provides an ideal opportunity to manage these woodlands to promote regeneration"
- Description: Doctor of Philosophy
Causes, magnitude and implications of Griefing in Massively Multiplayer Online Role-Playing Games
- Authors: Achterbosch, Leigh
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis presents findings from research into the global phenomenon known as griefing that occurs in Massively Multiplayer Online Role-Playing Games (MMORPGs). Griefing, in its simplest terms, refers to the act of one player intentionally disrupting another player’s game experience for personal pleasure and potential gain. For too long it has been unknown how pervasive griefing is, how frequently griefing occurs and, in particular, the impact on players that are subjected to griefing. There has also been limited research regarding what causes a player to perform griefing. This thesis addresses these concerns by answering the research question “What are the causes and implications of griefing in Massively Multiplayer Online Role-Playing Games, and what magnitude of griefing exists in this genre?” Mixed method research was employed using the “Sequential Explanatory Strategy”, in which a quantitative phase was followed by a qualitative phase to strengthen the findings. The quantitative phase consisted of a survey that attracted 1188 participants of a representative player population. The qualitative phase consisted of interviews with 15 participants to give more personalised data. The data was analysed from the perspectives of different demographics and different associations to griefing. The thesis contributed original findings regarding the causes, magnitude and implications of griefing in MMORPGs. Some of the main findings were: • Factors that motivated a player to cause grief; • how griefers selected their targets based on particular demographics or avatar characteristics; • the pervasiveness, frequency and impact of different types of griefing; • the amount of griefing that can be tolerated; • how players reacted to griefing; • the impact to the well-being of the players after a griefing incident. The thesis concluded with advice to MMORPG developers regarding the most pervasive, frequent and impactful types of griefing, and how game design may increase or decrease the amount and intensity of griefing.
- Description: Doctor of Philosophy
- Authors: Achterbosch, Leigh
- Date: 2015
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis presents findings from research into the global phenomenon known as griefing that occurs in Massively Multiplayer Online Role-Playing Games (MMORPGs). Griefing, in its simplest terms, refers to the act of one player intentionally disrupting another player’s game experience for personal pleasure and potential gain. For too long it has been unknown how pervasive griefing is, how frequently griefing occurs and, in particular, the impact on players that are subjected to griefing. There has also been limited research regarding what causes a player to perform griefing. This thesis addresses these concerns by answering the research question “What are the causes and implications of griefing in Massively Multiplayer Online Role-Playing Games, and what magnitude of griefing exists in this genre?” Mixed method research was employed using the “Sequential Explanatory Strategy”, in which a quantitative phase was followed by a qualitative phase to strengthen the findings. The quantitative phase consisted of a survey that attracted 1188 participants of a representative player population. The qualitative phase consisted of interviews with 15 participants to give more personalised data. The data was analysed from the perspectives of different demographics and different associations to griefing. The thesis contributed original findings regarding the causes, magnitude and implications of griefing in MMORPGs. Some of the main findings were: • Factors that motivated a player to cause grief; • how griefers selected their targets based on particular demographics or avatar characteristics; • the pervasiveness, frequency and impact of different types of griefing; • the amount of griefing that can be tolerated; • how players reacted to griefing; • the impact to the well-being of the players after a griefing incident. The thesis concluded with advice to MMORPG developers regarding the most pervasive, frequent and impactful types of griefing, and how game design may increase or decrease the amount and intensity of griefing.
- Description: Doctor of Philosophy