Managed identities : How do Australian university students who stutter negotiate their studies?
- Authors: Meredith, Grant
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Previous social research focused on people who stutter has problematised and largely ignored the experiences of university students who stutter, relying heavily upon surveys of teachers and peers while almost ignoring the authentic voices of students who stutter. Using a novel bricolage approach incorporating autoethnography, this project posed the question: “How do students who stutter negotiate their university experiences in Australia?” In 2008, a unique, web-based audit of 39 Australian public universities concluded that little publicly accessible information about stuttering support services was available for prospective university students. In many ways, stuttering is absent from disability classifications and service systems in higher education. An online survey of 102 Australian university students who stutter, and follow-up individual interviews with 15 students, revealed how these students manage their social identities from enrolment through to graduation. Only a minority of students reported ever formally disclosing their functional impairment to university support services or academic staff. This meant they rejected and/or avoided the disability label and associated stigma. The students were found to exercise a high degree of individual agency and creativity throughout their university journey. Many employed ‘concessional bargaining’ techniques to effectively navigate the oral assessment requirements during their degrees. Analysis of the interview and survey data is interspersed with critical self-reflection by the author – as a university lecturer who himself stutters. This thesis makes a significant contribution to shaping our understanding of the social identities and trajectories of university students who stutter. These students have been recast as positive, purposeful, resourceful and creative agents whose actions can be largely understood from a social model of disability. A series of recommendations for supporting and teaching these students are made to key stakeholders in higher education.
- Description: Doctor of Philosophy
- Authors: Meredith, Grant
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Previous social research focused on people who stutter has problematised and largely ignored the experiences of university students who stutter, relying heavily upon surveys of teachers and peers while almost ignoring the authentic voices of students who stutter. Using a novel bricolage approach incorporating autoethnography, this project posed the question: “How do students who stutter negotiate their university experiences in Australia?” In 2008, a unique, web-based audit of 39 Australian public universities concluded that little publicly accessible information about stuttering support services was available for prospective university students. In many ways, stuttering is absent from disability classifications and service systems in higher education. An online survey of 102 Australian university students who stutter, and follow-up individual interviews with 15 students, revealed how these students manage their social identities from enrolment through to graduation. Only a minority of students reported ever formally disclosing their functional impairment to university support services or academic staff. This meant they rejected and/or avoided the disability label and associated stigma. The students were found to exercise a high degree of individual agency and creativity throughout their university journey. Many employed ‘concessional bargaining’ techniques to effectively navigate the oral assessment requirements during their degrees. Analysis of the interview and survey data is interspersed with critical self-reflection by the author – as a university lecturer who himself stutters. This thesis makes a significant contribution to shaping our understanding of the social identities and trajectories of university students who stutter. These students have been recast as positive, purposeful, resourceful and creative agents whose actions can be largely understood from a social model of disability. A series of recommendations for supporting and teaching these students are made to key stakeholders in higher education.
- Description: Doctor of Philosophy
Application of psycholinguistic features to authorship profiling for first language, gender and age group
- Authors: Torney, Rosemary
- Date: 2014
- Type: Text , Thesis , PhD
- Full Text:
- Description: Much of the fraud committed in cyberspace involves the misrepresentation of the demographic data of the perpetrator via the medium of seemly anonymous text messages. One way to address this issue is to apply techniques from the field of authorship characterisation or profiling which is the analysis of text to determine the demographic profile of the author. Most of the previous research into authorship characterisation has used counts and ratios of lexicographically based features that include words, parts of words and Parts Of Speech (POS) contained within the text. This study examines the effectiveness of classifying the first language, gender and age group of an author using a set of features developed in the psycholinguistic field (the Linguistic Inquiry and Word Count - LIWC), both as a single type feature set and in combination with the lexicographically based features used in previous studies (function words, character bigrams and POS unigrams and bigrams). This study also searched for the smallest, most effective subset of each feature set that was practical, by ranking the features using three feature selection algorithms and systematically reducing the number used. In addition, the study explored the effective lower word limit for accurate classification by reducing the text size by regular increments. LIWC was found to be more effective than a similar number of any of the lexicographic feature types, and to add insight rather than noise when combined with these feature types. This held to be true for both the full and reduced text sizes for all three demographic classes examined. In addition it was found that the size of feature sets could be greatly reduced while still maintaining effective levels of classification accuracy.
- Description: Doctor of Philosophy
- Authors: Torney, Rosemary
- Date: 2014
- Type: Text , Thesis , PhD
- Full Text:
- Description: Much of the fraud committed in cyberspace involves the misrepresentation of the demographic data of the perpetrator via the medium of seemly anonymous text messages. One way to address this issue is to apply techniques from the field of authorship characterisation or profiling which is the analysis of text to determine the demographic profile of the author. Most of the previous research into authorship characterisation has used counts and ratios of lexicographically based features that include words, parts of words and Parts Of Speech (POS) contained within the text. This study examines the effectiveness of classifying the first language, gender and age group of an author using a set of features developed in the psycholinguistic field (the Linguistic Inquiry and Word Count - LIWC), both as a single type feature set and in combination with the lexicographically based features used in previous studies (function words, character bigrams and POS unigrams and bigrams). This study also searched for the smallest, most effective subset of each feature set that was practical, by ranking the features using three feature selection algorithms and systematically reducing the number used. In addition, the study explored the effective lower word limit for accurate classification by reducing the text size by regular increments. LIWC was found to be more effective than a similar number of any of the lexicographic feature types, and to add insight rather than noise when combined with these feature types. This held to be true for both the full and reduced text sizes for all three demographic classes examined. In addition it was found that the size of feature sets could be greatly reduced while still maintaining effective levels of classification accuracy.
- Description: Doctor of Philosophy
Analytical and numerical approaches to evaluate the effect of time-dependent and time-independent soil characteristics on the stability of deep excavations
- Authors: Ghadrdan, Mohsen
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Excavating the ground for different purposes, such as extracting valuable materials or undertaking urban construction, may cause concerns regarding the stability of the formed slopes, which can affect the environment, the economy, and human lives. Slope stability analysis in large-scale and deep excavations such as open-pit mines is challenging due to uncertainties regarding varying material parameters, complex field conditions and lack of or insufficient data such as pore water pressure distribution, in-situ stress conditions, and discontinuities. Despite different advanced analytical and numerical slope stability techniques having been developed, slope stability analysis may produce unreliable conclusions due to these uncertainties and challenges. This study’s objective is to investigate the effect of different factors associated with slope stability through a case study of the Yallourn brown coal open pit mine in Australia. In this study, the two most common slope stability methods—the Limit Equilibrium Method (LEM) and the Finite Element Method (FEM)—were employed. A comprehensive study was conducted to determine how the generation and dissipation of Negative Excess Pore-Water Pressure (NEPWP) affect slope stability assessments. Additionally, due to the complex geological stratigraphy of the site, different scenarios for geological layering were defined and investigated for the slope stability analyses. Moreover, the sensitivity of the slope stability assessment to not only different material characteristics but also different formulations and assumptions of LEM and FEM are presented.
- Description: Doctor of Philosophy
- Authors: Ghadrdan, Mohsen
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Excavating the ground for different purposes, such as extracting valuable materials or undertaking urban construction, may cause concerns regarding the stability of the formed slopes, which can affect the environment, the economy, and human lives. Slope stability analysis in large-scale and deep excavations such as open-pit mines is challenging due to uncertainties regarding varying material parameters, complex field conditions and lack of or insufficient data such as pore water pressure distribution, in-situ stress conditions, and discontinuities. Despite different advanced analytical and numerical slope stability techniques having been developed, slope stability analysis may produce unreliable conclusions due to these uncertainties and challenges. This study’s objective is to investigate the effect of different factors associated with slope stability through a case study of the Yallourn brown coal open pit mine in Australia. In this study, the two most common slope stability methods—the Limit Equilibrium Method (LEM) and the Finite Element Method (FEM)—were employed. A comprehensive study was conducted to determine how the generation and dissipation of Negative Excess Pore-Water Pressure (NEPWP) affect slope stability assessments. Additionally, due to the complex geological stratigraphy of the site, different scenarios for geological layering were defined and investigated for the slope stability analyses. Moreover, the sensitivity of the slope stability assessment to not only different material characteristics but also different formulations and assumptions of LEM and FEM are presented.
- Description: Doctor of Philosophy
Teacher perceptions of changes in school infrastructure and how these impact on their teaching practice
- Authors: Zivave, Takavada
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The impetus of this study comes from the 2009 Commonwealth Government of Australia’s $16.2 billion investment in school infrastructure under the Building the Education Revolution (BER) program. The BER program was supposed to stimulate the economy through creating construction jobs by building schools and ensuring that workers had jobs during the global financial crisis. Provision of learning spaces and learning space design was secondary to this need to create construction jobs. This thesis aimed to explore the teaching activity using an activity system based on Cultural-Historical Activity Theory (CHAT) (Engestrom, 1987) with the intent of bringing out or exposing the contribution made by the BER school infrastructure program on teaching especially around issues of pedagogy, teamwork, wellbeing, collaboration and interactions with students. Using a mixed-methods approach, the study utilised three sources of data, document analysis, online survey responses and focus group interviews. In the first phase, data were collected using a document analysis, this information guided the design of the online survey instrument, which was used to collect data in the second phase. Data collected using both the document analysis and online survey responses were used in the third phase, which involved focus group interviews. The data analysis involved identifying, grouping together and labelling document analysis, data from the online survey and transcripts of focus group interviews. These were coded and organised into themes, or units of meaning. The quantitative data was presented in frequency tables and descriptive statistics. This quantitative data was corroborated with extracts from focus group interviews and document analysis data where possible. The study’s findings demonstrated that school infrastructure supports teacher collaboration by allowing for team planning and co-teaching. Furthermore, the study revealed a link between teacher collaboration and teacher wellbeing. The study findings indicate that when teachers plan together and co-teach, their workload is reduced contributing positively to teacher wellbeing. The study suggests that a relationship exists between school infrastructure and student-teacher interactions, which serves to reduce negative interactions when dealing with outside classroom behaviour. The present study seeks to generate insights that, while unique to participants and individuals, are anticipated to be of interest to teachers more broadly. Potentially, the findings from this study could inform other educational contexts, for example, school architectural designers. Significantly, this research seeks to contribute to literature on the importance of school infrastructure on teacher performance ultimately improving student-learning outcomes.
- Description: Doctor of Philosophy
- Authors: Zivave, Takavada
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The impetus of this study comes from the 2009 Commonwealth Government of Australia’s $16.2 billion investment in school infrastructure under the Building the Education Revolution (BER) program. The BER program was supposed to stimulate the economy through creating construction jobs by building schools and ensuring that workers had jobs during the global financial crisis. Provision of learning spaces and learning space design was secondary to this need to create construction jobs. This thesis aimed to explore the teaching activity using an activity system based on Cultural-Historical Activity Theory (CHAT) (Engestrom, 1987) with the intent of bringing out or exposing the contribution made by the BER school infrastructure program on teaching especially around issues of pedagogy, teamwork, wellbeing, collaboration and interactions with students. Using a mixed-methods approach, the study utilised three sources of data, document analysis, online survey responses and focus group interviews. In the first phase, data were collected using a document analysis, this information guided the design of the online survey instrument, which was used to collect data in the second phase. Data collected using both the document analysis and online survey responses were used in the third phase, which involved focus group interviews. The data analysis involved identifying, grouping together and labelling document analysis, data from the online survey and transcripts of focus group interviews. These were coded and organised into themes, or units of meaning. The quantitative data was presented in frequency tables and descriptive statistics. This quantitative data was corroborated with extracts from focus group interviews and document analysis data where possible. The study’s findings demonstrated that school infrastructure supports teacher collaboration by allowing for team planning and co-teaching. Furthermore, the study revealed a link between teacher collaboration and teacher wellbeing. The study findings indicate that when teachers plan together and co-teach, their workload is reduced contributing positively to teacher wellbeing. The study suggests that a relationship exists between school infrastructure and student-teacher interactions, which serves to reduce negative interactions when dealing with outside classroom behaviour. The present study seeks to generate insights that, while unique to participants and individuals, are anticipated to be of interest to teachers more broadly. Potentially, the findings from this study could inform other educational contexts, for example, school architectural designers. Significantly, this research seeks to contribute to literature on the importance of school infrastructure on teacher performance ultimately improving student-learning outcomes.
- Description: Doctor of Philosophy
Genomic and flow cytometric studies of Clostridium sporogenes, a non-toxigenic surrogate for Clostridium botulinum
- Authors: Bradbury, Mark
- Date: 2014
- Type: Text , Thesis , PhD
- Full Text:
- Description: Clostridium sporogenes and Group I Clostridium botulinum are two bacterial species belonging to the same phylogenetic group, primarily differentiated by the expression of botulinum neurotoxin. Both organisms are of significant commercial importance in regards to the spoilage of and/or disease in thermally processed food products due to their ability to form heat resistant spores. As such, these species are often used as the target organism for the design of thermal inactivation processes, particularly in regards to thermal sterilisation. Two specific aspects pertaining to these organisms were investigated to further enhance knowledge with respect to their use in thermal processing studies: the genetic relationship between C. sporogenes and Group I C. botulinum; and the mechanism of heat resistance in spores of C. sporogenes. The first part of this thesis describes the assembly, annotation and analysis of the draft genome of C. sporogenes PA 3679 (the most widely used surrogate for Group I C. botulinum). These data allowed identification of unique variants genes related to spore germination, analogous toxin regions and mobile elements between species. MLST analysis revealed that phylogeny was an ineffective indicator of toxigenicity in this group and thus prompted a pan-genomic analysis. The pan-genome of C. sporogenes/Group I C. botulinum was found to consist of 8799 coding sequences (CDS’s) and a core genome consisting of 1590 CDS’s. Analysis of this pan-genome revealed the significant role that mobile genetic elements have played in genetic diversity within this group of organisms. The second part of this thesis investigated the heat inactivation of C. sporogenes PA 3679 spores in regards to structural variation and population heterogeneity. A novel flow cytometric approach was developed and utilised to investigate isothermal spore inactivation; and implications of the impact of NaCl on the intrinsic variability throughout this process and during a subsequent recovery period. Based on these approaches a possible mechanistic description for the thermal inactivation of spores was developed. Together, these studies present significant evidence supporting the continued suitability of C. sporogenes as a surrogate for Group I C. botulinum, whilst also enhancing the understanding of clostridial spore inactivation during a moist heat process.
- Description: Doctor of Philosophy
- Authors: Bradbury, Mark
- Date: 2014
- Type: Text , Thesis , PhD
- Full Text:
- Description: Clostridium sporogenes and Group I Clostridium botulinum are two bacterial species belonging to the same phylogenetic group, primarily differentiated by the expression of botulinum neurotoxin. Both organisms are of significant commercial importance in regards to the spoilage of and/or disease in thermally processed food products due to their ability to form heat resistant spores. As such, these species are often used as the target organism for the design of thermal inactivation processes, particularly in regards to thermal sterilisation. Two specific aspects pertaining to these organisms were investigated to further enhance knowledge with respect to their use in thermal processing studies: the genetic relationship between C. sporogenes and Group I C. botulinum; and the mechanism of heat resistance in spores of C. sporogenes. The first part of this thesis describes the assembly, annotation and analysis of the draft genome of C. sporogenes PA 3679 (the most widely used surrogate for Group I C. botulinum). These data allowed identification of unique variants genes related to spore germination, analogous toxin regions and mobile elements between species. MLST analysis revealed that phylogeny was an ineffective indicator of toxigenicity in this group and thus prompted a pan-genomic analysis. The pan-genome of C. sporogenes/Group I C. botulinum was found to consist of 8799 coding sequences (CDS’s) and a core genome consisting of 1590 CDS’s. Analysis of this pan-genome revealed the significant role that mobile genetic elements have played in genetic diversity within this group of organisms. The second part of this thesis investigated the heat inactivation of C. sporogenes PA 3679 spores in regards to structural variation and population heterogeneity. A novel flow cytometric approach was developed and utilised to investigate isothermal spore inactivation; and implications of the impact of NaCl on the intrinsic variability throughout this process and during a subsequent recovery period. Based on these approaches a possible mechanistic description for the thermal inactivation of spores was developed. Together, these studies present significant evidence supporting the continued suitability of C. sporogenes as a surrogate for Group I C. botulinum, whilst also enhancing the understanding of clostridial spore inactivation during a moist heat process.
- Description: Doctor of Philosophy
An investigative study of burnout among university nurse academics in Australia
- Authors: Singh, Charanjit
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The overall aims of this study were to investigate the prevalence, extent and explore the experiences of Nurse Academics in Australia in relation to job satisfaction and burnout. Over the last three decades, university teaching has become increasingly challenging and stressful; this has affected the quality of life of academics. This is evidenced by the rapidly changing working conditions and stress experienced globally among university academics Consequently, the relationship between academics and their workplace are very demanding, more stressed, followed by lack of resources and eventually leading to burnout. Burnout is defined as a psychological syndrome emerging as a prolonged response to chronic interpersonal stressors on the job. Since, the move of nurse education into the university sector in Australia in the mid 1980’s, the stress and demands placed upon Nursing Academics has risen and intensified dramatically. Although the literature is replete about the work experiences among university academics very little research has been carried out to investigate the prevalence and explore the experiences among nurse academics, particularly within Australia (Bittner, & Bechtel, 2017) in relation to occupational stress and burnout. This research study utilized a mixed methods design, specifically, the sequential explanatory model A two phased approach was utilized. In phase one 234 nurse academics completed the survey comprised of the MBI, MSQ and demographics. In phase two, 19 participants were interviewed. The conceptual framework that underpins this study is influenced by the Job- Demands Resource Model (J-DR Model). In phase one, participants were drawn from a cross section from novice to experienced academics. 50% of participants reported low levels of burnout, whilst the other 50% reported either moderate or high levels of burnout. Out of these 50% who experienced burnout about 20% of respondents experienced a high-level of burnout. Similarly, 50% of the participants experienced low levels of job satisfaction and this correlated significantly with high levels of the total burnout scores (r = -0.56). Within the qualitative component, the main themes included a lack of work life balance, incivility towards staff, increasing workloads, challenging students, lack of recognition, negative workplace culture, lack of awareness of the importance of political astuteness, and lack of leadership skills and difficulty with retention of newly appointed staff. Many participants also expressed being threatened, felling intimidated, and unfairly treated coupled with facing personalities who were driven by power struggles. Overall, there appeared to be a sense of powerlessness, that participants were relatively powerless and unable to change their lot. Although personal resilience provided a buffering effect for some of the participants and acted as a protective factor against stress and burnout it is not well understood. This research study contributes to the ongoing body of work on the experiences of nurse academics globally and gives a further insight and understanding of the personal experiences of occupational stress and burnout among Australian nurse academics. However, a few potential limitations to this study should be noted. The study sample was only selected from within Australian universities which may limit the global generalisation of the findings and it was undertaken at an only one time point. Occupational stress leading to burnout is still considered an important factor and predictor of job satisfaction and intention to leave among Australian nurse academics. Effective mentoring and leadership styles that promote a nurturing work environment, a sense of belonging, being valued, heard, and recognised, are areas of priority. Strategies and policies should be revised for greater inclusiveness, academic freedom, institutional autonomy, and a better work-life balance. Further work is needed that examines the specific types of support systems that nurse leaders could initiate to reduce job stress leading to burnout. Ongoing evaluation is crucial to ensure the appropriateness, efficacy, and effectiveness of the support systems. The findings have important global implications in terms of recruitment and retention of nurse academic.
- Description: Doctor of Philosophy
- Authors: Singh, Charanjit
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The overall aims of this study were to investigate the prevalence, extent and explore the experiences of Nurse Academics in Australia in relation to job satisfaction and burnout. Over the last three decades, university teaching has become increasingly challenging and stressful; this has affected the quality of life of academics. This is evidenced by the rapidly changing working conditions and stress experienced globally among university academics Consequently, the relationship between academics and their workplace are very demanding, more stressed, followed by lack of resources and eventually leading to burnout. Burnout is defined as a psychological syndrome emerging as a prolonged response to chronic interpersonal stressors on the job. Since, the move of nurse education into the university sector in Australia in the mid 1980’s, the stress and demands placed upon Nursing Academics has risen and intensified dramatically. Although the literature is replete about the work experiences among university academics very little research has been carried out to investigate the prevalence and explore the experiences among nurse academics, particularly within Australia (Bittner, & Bechtel, 2017) in relation to occupational stress and burnout. This research study utilized a mixed methods design, specifically, the sequential explanatory model A two phased approach was utilized. In phase one 234 nurse academics completed the survey comprised of the MBI, MSQ and demographics. In phase two, 19 participants were interviewed. The conceptual framework that underpins this study is influenced by the Job- Demands Resource Model (J-DR Model). In phase one, participants were drawn from a cross section from novice to experienced academics. 50% of participants reported low levels of burnout, whilst the other 50% reported either moderate or high levels of burnout. Out of these 50% who experienced burnout about 20% of respondents experienced a high-level of burnout. Similarly, 50% of the participants experienced low levels of job satisfaction and this correlated significantly with high levels of the total burnout scores (r = -0.56). Within the qualitative component, the main themes included a lack of work life balance, incivility towards staff, increasing workloads, challenging students, lack of recognition, negative workplace culture, lack of awareness of the importance of political astuteness, and lack of leadership skills and difficulty with retention of newly appointed staff. Many participants also expressed being threatened, felling intimidated, and unfairly treated coupled with facing personalities who were driven by power struggles. Overall, there appeared to be a sense of powerlessness, that participants were relatively powerless and unable to change their lot. Although personal resilience provided a buffering effect for some of the participants and acted as a protective factor against stress and burnout it is not well understood. This research study contributes to the ongoing body of work on the experiences of nurse academics globally and gives a further insight and understanding of the personal experiences of occupational stress and burnout among Australian nurse academics. However, a few potential limitations to this study should be noted. The study sample was only selected from within Australian universities which may limit the global generalisation of the findings and it was undertaken at an only one time point. Occupational stress leading to burnout is still considered an important factor and predictor of job satisfaction and intention to leave among Australian nurse academics. Effective mentoring and leadership styles that promote a nurturing work environment, a sense of belonging, being valued, heard, and recognised, are areas of priority. Strategies and policies should be revised for greater inclusiveness, academic freedom, institutional autonomy, and a better work-life balance. Further work is needed that examines the specific types of support systems that nurse leaders could initiate to reduce job stress leading to burnout. Ongoing evaluation is crucial to ensure the appropriateness, efficacy, and effectiveness of the support systems. The findings have important global implications in terms of recruitment and retention of nurse academic.
- Description: Doctor of Philosophy
Head, neck, and facial injuries in Australian cricket
- Authors: Kodikara, Dulan
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: Head, neck and facial (HNF) injuries are a significant concern in cricket due to the nature of the game and the potential impact of fast-moving balls and collisions. These types of injuries occur as a result of direct hits from the cricket ball, accidental collisions between players or falls during fielding or batting. HNF injuries can range from minor cuts and bruises to more severe concussions, fractures, or dental trauma. While some HNF injuries in cricket can be career-ending and severe, others may not be as catastrophic. Over the past decade, there has been a noticeable increase in the incidence of HNF injuries in elite-level cricket, and the tragic death of an Australian test cricketer in 2014 from a head injury heightened awareness of the seriousness and potential fatality of such injuries in the sport. To mitigate the risk of serious injuries, cricket players are encouraged to wear protective equipment such as helmets and neck guards. At the elite level of the sport, stringent safety protocols and regulations are enforced to prioritise player wellbeing, ensuring that immediate medical attention is available during training or games. Further, routine injury surveillance at the elite level has proven effective in monitoring and reducing the likelihood of serious HNF injuries. Nevertheless, there is a noticeable lack of research investigating HNF injuries among cricket participants, particularly at the community level. This lack of reporting hampers the identification and implementation of effective strategies to minimise the risk of such injuries. This thesis seeks to bridge this research gap by examining HNF injuries in community-level cricket under two broad objectives, providing valuable insights for injury prevention and risk mitigation strategies. The first objective of this thesis was to develop a comprehensive understanding of HNF cricket injury epidemiology and the reporting of helmet usage. A systematic review was conducted, analysing 29 studies to determine the incidence, nature, and mechanisms of HNF injuries in cricket, the reported use of helmets and ‘gold standard’ definitions. Facial fractures and concussions were the most frequently specified types of injuries, and the impact of the ball was reported as the most common mechanism for sustaining HNF injuries in cricket. Only three studies (10%) reported the use of helmets. The systematic review highlighted the lack of evidence regarding the reporting of HNF cricket injuries according to international cricket consensus injury definitions, as well as the limited data on helmet usage at the time of injury. Additionally, the review identified gaps in evidence concerning HNF injuries across different age groups, levels of play and diverse populations, along with discrepancies in reporting injury-specific mechanisms. Community-level HNF cricket injuries that required hospitalisation in Victoria, Australia, over a decade, spanning from 2007/8 to 2016/17 were also reviewed under the first objective. During this period, Victorian hospitals treated 3,907 HNF cricket injuries. Male participants accounted for a higher number of injuries than female participants, and the age group most commonly requiring hospital treatment was 10–14 years. Open wounds were the most frequent type of injury (30%), and the primary mechanism for HNF cricket injuries during this decade was being hit, struck, or crushed (86%). Our literature review and the hospital study form the ideal platform for injury prevention efforts by establishing HNF injury prevalence and common injury mechanisms. The second broad objective of this thesis was to investigate the use of cricket helmets among cricket participants, to study the ability of Australian cricket participants to perceive injury risk and to explore the knowledge and awareness of concussion assessment and management. An online survey was conducted to address each facet of our second objective. Over 90% of the players and 50% of the officials reported wearing a helmet during the 2018/19 cricket season, but most did not use a neck protector. Most of the helmets used met the recommended British Standards, and the most common brand used was Masuri. For most of the players and officials who participated in our survey, comfort, and ability to prevent HNF injuries were the two most important factors affecting their decision to purchase a cricket helmet. More than 80% of players and almost 50% of officials expressed the belief that helmets were not necessary for activities such as bowling and fielding at a distance from the batter. Yet, the fact that more than 80% of all participants expressed their willingness to keep using helmets under compulsory regulations indicates that implementing mandatory helmet rules might result in a significant increase in helmet adoption and enhance the overall safety of the sport. Over 70% of our survey participants demonstrated satisfactory levels of knowledge regarding concussion assessment and management. These findings suggest that the potential for severe complications stemming from concussions related to cricket could be reduced, particularly in light of the limited availability of qualified medical professionals at the community-level. The strong understanding of concussion guidelines among our survey participants implies that they would be inclined to prioritise safety and choose helmets that align with the recommended safety standards. In summary, this PhD research has achieved its objective of making the first large-scale scientific contribution to enhance safety and prevent HNF injuries among participants of community-level cricket in Australia. Additionally, this research effectively assessed the participants’ knowledge, comprehension and attitudes regarding utilising protective helmets and the importance of following Cricket Australia’s concussion guidelines.
- Description: Doctor of Philosophy
- Authors: Kodikara, Dulan
- Date: 2023
- Type: Text , Thesis , PhD
- Full Text:
- Description: Head, neck and facial (HNF) injuries are a significant concern in cricket due to the nature of the game and the potential impact of fast-moving balls and collisions. These types of injuries occur as a result of direct hits from the cricket ball, accidental collisions between players or falls during fielding or batting. HNF injuries can range from minor cuts and bruises to more severe concussions, fractures, or dental trauma. While some HNF injuries in cricket can be career-ending and severe, others may not be as catastrophic. Over the past decade, there has been a noticeable increase in the incidence of HNF injuries in elite-level cricket, and the tragic death of an Australian test cricketer in 2014 from a head injury heightened awareness of the seriousness and potential fatality of such injuries in the sport. To mitigate the risk of serious injuries, cricket players are encouraged to wear protective equipment such as helmets and neck guards. At the elite level of the sport, stringent safety protocols and regulations are enforced to prioritise player wellbeing, ensuring that immediate medical attention is available during training or games. Further, routine injury surveillance at the elite level has proven effective in monitoring and reducing the likelihood of serious HNF injuries. Nevertheless, there is a noticeable lack of research investigating HNF injuries among cricket participants, particularly at the community level. This lack of reporting hampers the identification and implementation of effective strategies to minimise the risk of such injuries. This thesis seeks to bridge this research gap by examining HNF injuries in community-level cricket under two broad objectives, providing valuable insights for injury prevention and risk mitigation strategies. The first objective of this thesis was to develop a comprehensive understanding of HNF cricket injury epidemiology and the reporting of helmet usage. A systematic review was conducted, analysing 29 studies to determine the incidence, nature, and mechanisms of HNF injuries in cricket, the reported use of helmets and ‘gold standard’ definitions. Facial fractures and concussions were the most frequently specified types of injuries, and the impact of the ball was reported as the most common mechanism for sustaining HNF injuries in cricket. Only three studies (10%) reported the use of helmets. The systematic review highlighted the lack of evidence regarding the reporting of HNF cricket injuries according to international cricket consensus injury definitions, as well as the limited data on helmet usage at the time of injury. Additionally, the review identified gaps in evidence concerning HNF injuries across different age groups, levels of play and diverse populations, along with discrepancies in reporting injury-specific mechanisms. Community-level HNF cricket injuries that required hospitalisation in Victoria, Australia, over a decade, spanning from 2007/8 to 2016/17 were also reviewed under the first objective. During this period, Victorian hospitals treated 3,907 HNF cricket injuries. Male participants accounted for a higher number of injuries than female participants, and the age group most commonly requiring hospital treatment was 10–14 years. Open wounds were the most frequent type of injury (30%), and the primary mechanism for HNF cricket injuries during this decade was being hit, struck, or crushed (86%). Our literature review and the hospital study form the ideal platform for injury prevention efforts by establishing HNF injury prevalence and common injury mechanisms. The second broad objective of this thesis was to investigate the use of cricket helmets among cricket participants, to study the ability of Australian cricket participants to perceive injury risk and to explore the knowledge and awareness of concussion assessment and management. An online survey was conducted to address each facet of our second objective. Over 90% of the players and 50% of the officials reported wearing a helmet during the 2018/19 cricket season, but most did not use a neck protector. Most of the helmets used met the recommended British Standards, and the most common brand used was Masuri. For most of the players and officials who participated in our survey, comfort, and ability to prevent HNF injuries were the two most important factors affecting their decision to purchase a cricket helmet. More than 80% of players and almost 50% of officials expressed the belief that helmets were not necessary for activities such as bowling and fielding at a distance from the batter. Yet, the fact that more than 80% of all participants expressed their willingness to keep using helmets under compulsory regulations indicates that implementing mandatory helmet rules might result in a significant increase in helmet adoption and enhance the overall safety of the sport. Over 70% of our survey participants demonstrated satisfactory levels of knowledge regarding concussion assessment and management. These findings suggest that the potential for severe complications stemming from concussions related to cricket could be reduced, particularly in light of the limited availability of qualified medical professionals at the community-level. The strong understanding of concussion guidelines among our survey participants implies that they would be inclined to prioritise safety and choose helmets that align with the recommended safety standards. In summary, this PhD research has achieved its objective of making the first large-scale scientific contribution to enhance safety and prevent HNF injuries among participants of community-level cricket in Australia. Additionally, this research effectively assessed the participants’ knowledge, comprehension and attitudes regarding utilising protective helmets and the importance of following Cricket Australia’s concussion guidelines.
- Description: Doctor of Philosophy
Cognitive behaviour therapy for insomnia and depression among older adults : A mixed methods randomised controlled clinical trial
- Authors: Sadler, Paul
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Background A strong relationship exists between insomnia and depression, particularly among older adults (aged 65 years and older). Recently experts in the field of behavioural sleep medicine established cognitive behaviour therapy (CBT) was an effective treatment for comorbid insomnia, however, it was unknown whether cognitive behaviour therapy for insomnia (CBT-I) benefitted older adults with co-occurring depression (literature review published in Cognitive Behaviour Therapy). A mixed-methods randomised controlled clinical trial (RCT) was warranted within a community mental health setting to investigate the efficacy of CBT-I for older adults with comorbid insomnia and depression. Furthermore, no study had tested whether an advanced form of CBT-I that included additional positive mood-enhancing strategies produced better outcomes compared to a standard form of CBT-I that only targeted insomnia. It was anticipated that the results from such a trial could influence the evolution of treatment for older adults with these highly prevalent comorbid conditions. Methodology An RCT was conducted between 2014 and 2016 across Victoria, Australia, through Latrobe Regional Hospital‟s and Peninsula Health‟s Community Mental Health Services (protocol published in Trials). Seventy-two older adults with diagnosed comorbid insomnia and depression were randomly assigned to one of three group therapy conditions: cognitive behaviour therapy for insomnia (CBT-I, standard), cognitive behaviour therapy for insomnia plus positive mood strategies (CBT-I+, advanced), psychoeducation control group (PCG, control). The primary outcomes were insomnia severity (Insomnia Severity Index) and depression severity (Geriatric Depression Scale). Primary and secondary measures were collected at pre (week 0), post (week 8), and follow-up (week 20). Participants who completed the experiential conditions were invited to provide feedback in the form of semi- xvii structured focus groups following the final session of treatment. Thirty-one participants from six groups reflected on their experiences of participating in CBT-I and CBT-I+. Results Quantitative analyses demonstrated the experiential CBT conditions both generated significantly greater reductions in insomnia and depression severity compared to PCG from pre to post, which were maintained at follow-up. The standard and advanced conditions showed similar reductions on insomnia and depression severity at post and follow up. These results were also consistent for the secondary measures across conditions. Both active treatments demonstrated large effect sizes, high retention, and strong remission rates for older adults with insomnia and depression (published in journal SLEEP). A qualitative analysis was also conducted to explore the participants‟ experiences of treatment. Interview data from the reflective focus groups was transcribed into 424 sentences and 60 codes were extracted. Thirty-four initial themes emerged, which were finally transformed into 3 themes and 10 subthemes. The three themes were (1) positive experiences, (2) negative experiences, and (3) suggested modifications. The positive subthemes were (1a) therapists, (1b) togetherness, (1c) use of strategies reduced symptoms, and (1d) acceptance. The negative subthemes were (2a) persistent symptoms, (2b) program too condensed, and (2c) attendance obstacles. The suggested modifications were (3a) lengthen program, (3b) multi-dimensional learning, and (3c) multi-modal delivery options (manuscript under review in Aging and Mental Health). Conclusion This is the first RCT to demonstrate that specifically treating comorbid insomnia with CBT has an additional positive effect of improving depression for older adults with multiple comorbidities. Both CBT programs were effective at reducing insomnia and depression severity for older adults with comorbidity. Replication of this study is necessary with a larger sample size to conclusively establish whether the two interventions have different or equivalent effects. It was suggested mental health services that deliver treatment for comorbid insomnia with CBT may improve recovery outcomes for older adults with depression. Future CBT-I programs for older adults may be improved by increasing the length of therapy (e.g., 8 sessions to 12 sessions), adding multi-dimensional learning opportunities (e.g., visual/audio/mentorship), and offering various modes of treatment delivery (e.g., group, individual, internet, telephone).
- Description: Doctor of Philosophy
- Authors: Sadler, Paul
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Background A strong relationship exists between insomnia and depression, particularly among older adults (aged 65 years and older). Recently experts in the field of behavioural sleep medicine established cognitive behaviour therapy (CBT) was an effective treatment for comorbid insomnia, however, it was unknown whether cognitive behaviour therapy for insomnia (CBT-I) benefitted older adults with co-occurring depression (literature review published in Cognitive Behaviour Therapy). A mixed-methods randomised controlled clinical trial (RCT) was warranted within a community mental health setting to investigate the efficacy of CBT-I for older adults with comorbid insomnia and depression. Furthermore, no study had tested whether an advanced form of CBT-I that included additional positive mood-enhancing strategies produced better outcomes compared to a standard form of CBT-I that only targeted insomnia. It was anticipated that the results from such a trial could influence the evolution of treatment for older adults with these highly prevalent comorbid conditions. Methodology An RCT was conducted between 2014 and 2016 across Victoria, Australia, through Latrobe Regional Hospital‟s and Peninsula Health‟s Community Mental Health Services (protocol published in Trials). Seventy-two older adults with diagnosed comorbid insomnia and depression were randomly assigned to one of three group therapy conditions: cognitive behaviour therapy for insomnia (CBT-I, standard), cognitive behaviour therapy for insomnia plus positive mood strategies (CBT-I+, advanced), psychoeducation control group (PCG, control). The primary outcomes were insomnia severity (Insomnia Severity Index) and depression severity (Geriatric Depression Scale). Primary and secondary measures were collected at pre (week 0), post (week 8), and follow-up (week 20). Participants who completed the experiential conditions were invited to provide feedback in the form of semi- xvii structured focus groups following the final session of treatment. Thirty-one participants from six groups reflected on their experiences of participating in CBT-I and CBT-I+. Results Quantitative analyses demonstrated the experiential CBT conditions both generated significantly greater reductions in insomnia and depression severity compared to PCG from pre to post, which were maintained at follow-up. The standard and advanced conditions showed similar reductions on insomnia and depression severity at post and follow up. These results were also consistent for the secondary measures across conditions. Both active treatments demonstrated large effect sizes, high retention, and strong remission rates for older adults with insomnia and depression (published in journal SLEEP). A qualitative analysis was also conducted to explore the participants‟ experiences of treatment. Interview data from the reflective focus groups was transcribed into 424 sentences and 60 codes were extracted. Thirty-four initial themes emerged, which were finally transformed into 3 themes and 10 subthemes. The three themes were (1) positive experiences, (2) negative experiences, and (3) suggested modifications. The positive subthemes were (1a) therapists, (1b) togetherness, (1c) use of strategies reduced symptoms, and (1d) acceptance. The negative subthemes were (2a) persistent symptoms, (2b) program too condensed, and (2c) attendance obstacles. The suggested modifications were (3a) lengthen program, (3b) multi-dimensional learning, and (3c) multi-modal delivery options (manuscript under review in Aging and Mental Health). Conclusion This is the first RCT to demonstrate that specifically treating comorbid insomnia with CBT has an additional positive effect of improving depression for older adults with multiple comorbidities. Both CBT programs were effective at reducing insomnia and depression severity for older adults with comorbidity. Replication of this study is necessary with a larger sample size to conclusively establish whether the two interventions have different or equivalent effects. It was suggested mental health services that deliver treatment for comorbid insomnia with CBT may improve recovery outcomes for older adults with depression. Future CBT-I programs for older adults may be improved by increasing the length of therapy (e.g., 8 sessions to 12 sessions), adding multi-dimensional learning opportunities (e.g., visual/audio/mentorship), and offering various modes of treatment delivery (e.g., group, individual, internet, telephone).
- Description: Doctor of Philosophy
Intelligent zero-day intrusion detection framework for internet of things
- Authors: Khraisat, Ansam
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Zero-day intrusion detection system faces serious challenges as hundreds of thousands of new instances of malware are being created every day to cause harm or damage to the computer system. Cyber-attacks are becoming more sophisticated, leading to challenges in intrusion detection. There are many Intrusion Detection Systems (IDSs), which are proposed to identify abnormal activities, but most of these IDSs produce a large number of false positives and low detection accuracy. Hence, a significant quantity of false positives could generate a high-level of alerts in a short period of time as the normal activities are classified as intrusion activities. This thesis proposes a novel framework of hybrid intrusion detection system that integrates the Signature Intrusion Detection System (SIDS) with the Anomaly Intrusion Detection System (AIDS) to detect zero-day attacks with high accuracy. SIDS has been used to identify previously known intrusions, and AIDS has been applied to detect unknown zero-day intrusions. The goal of this research is to combine the strengths of each technique toward the development of a hybrid framework for the efficient intrusion detection system. A number of performance measures including accuracy, F-measure and area under ROC curve have been used to evaluate the efficacy of our proposed models and to compare and contrast with existing approaches. Extensive simulation results conducted in this thesis show that the proposed framework is capable of yielding excellent detection performance when tested with a number of widely used benchmark datasets in the intrusion detection system domain. Experiments show that the proposed hybrid IDS provides higher detection rate and lower false-positive rate in detecting intrusions as compared to the SIDS and AIDS techniques individually.
- Description: Doctor of Philosophy
- Authors: Khraisat, Ansam
- Date: 2020
- Type: Text , Thesis , PhD
- Full Text:
- Description: Zero-day intrusion detection system faces serious challenges as hundreds of thousands of new instances of malware are being created every day to cause harm or damage to the computer system. Cyber-attacks are becoming more sophisticated, leading to challenges in intrusion detection. There are many Intrusion Detection Systems (IDSs), which are proposed to identify abnormal activities, but most of these IDSs produce a large number of false positives and low detection accuracy. Hence, a significant quantity of false positives could generate a high-level of alerts in a short period of time as the normal activities are classified as intrusion activities. This thesis proposes a novel framework of hybrid intrusion detection system that integrates the Signature Intrusion Detection System (SIDS) with the Anomaly Intrusion Detection System (AIDS) to detect zero-day attacks with high accuracy. SIDS has been used to identify previously known intrusions, and AIDS has been applied to detect unknown zero-day intrusions. The goal of this research is to combine the strengths of each technique toward the development of a hybrid framework for the efficient intrusion detection system. A number of performance measures including accuracy, F-measure and area under ROC curve have been used to evaluate the efficacy of our proposed models and to compare and contrast with existing approaches. Extensive simulation results conducted in this thesis show that the proposed framework is capable of yielding excellent detection performance when tested with a number of widely used benchmark datasets in the intrusion detection system domain. Experiments show that the proposed hybrid IDS provides higher detection rate and lower false-positive rate in detecting intrusions as compared to the SIDS and AIDS techniques individually.
- Description: Doctor of Philosophy
Hybrid training approaches to Hidden Markov Model-based acoustic models for automatic speech recognition
- Authors: Huda, Shamsul
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Doctor of Philosophy
- Authors: Huda, Shamsul
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Doctor of Philosophy
A new perceptual dissimilarity measure for image retrieval and clustering
- Authors: Shojanazeri, Hamid
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Image retrieval and clustering are two important tools for analysing and organising images. Dissimilarity measure is central to both image retrieval and clustering. The performance of image retrieval and clustering algorithms depends on the effectiveness of the dissimilarity measure. ‘Minkowski’ distance, or more specifically, ‘Euclidean’ distance, is the most widely used dissimilarity measure in image retrieval and clustering. Euclidean distance depends only on the geometric position of two data instances in the feature space and completely ignores the data distribution. However, data distribution has an effect on human perception. The argument that two data instances in a dense area are more perceptually dissimilar than the same two instances in a sparser area, is proposed by psychologists. Based on this idea, a dissimilarity measure called, ‘mp’, has been proposed to address Euclidean distance’s limitation of ignoring the data distribution. Here, mp relies on data distribution to calculate the dissimilarity between two instances. As prescribed in mp, higher data mass between two data instances implies higher dissimilarity, and vice versa. mp relies only on data distribution and completely ignores the geometric distance in its calculations. In the aggregation of dissimilarities between two instances over all the dimensions in feature space, both Euclidean distance and mp give same priority to all the dimensions. This may result in a situation that the final dissimilarity between two data instances is determined by a few dimensions of feature vectors with relatively much higher values. As a result, the dissimilarity derived may not align well with human perception. The need to address the limitations of Minkowski distance measures, along with the importance of a dissimilarity measure that considers both geometric distance and the perceptual effect of data distribution in measuring dissimilarity between images motivated this thesis. It studies the performance of mp for image retrieval. It investigates a new dissimilarity measure that combines both Euclidean distance and data distribution. In addition to these, it studies the performance of such a dissimilarity measure for image retrieval and clustering. Our performance study of mp for image retrieval shows that relying only on data distribution to measure the dissimilarity results in some situations, where the mp’s measurement is contrary to human perception. This thesis introduces a new dissimilarity measure called, perceptual dissimilarity measure (PDM). PDM considers the perceptual effect of data distribution in combination with Euclidean distance. PDM has two variants, PDM1 and PDM2. PDM1 focuses on improving mp by weighting it using Euclidean distance in situations where mp may not retrieve accurate results. PDM2 considers the effect of data distribution on the perceived dissimilarity measured by Euclidean distance. PDM2 proposes a weighting system for Euclidean distance using a logarithmic transform of data mass. The proposed PDM variants have been used as alternatives to Euclidean distance and mp to improve the accuracy in image retrieval. Our results show that PDM2 has consistently performed the best, compared to Euclidean distance, mp and PDM1. PDM1’s performance was not consistent, although it has performed better than mp in all the experiments, but it could not outperform Euclidean distance in some cases. Following the promising results of PDM2 in image retrieval, we have studied its performance for image clustering. k-means is the most widely used clustering algorithm in scientific and industrial applications. k-medoids is the closest clustering algorithm to k-means. Unlike k-means which works only with Euclidean distance, k-medoids gives the option to choose the arbitrary dissimilarity measure. We have used Euclidean distance, mp and PDM2 as the dissimilarity measure in k-medoids and compared the results with k-means. Our clustering results show that PDM2 has perfromed overally the best. This confirms our retrieval results and identifies PDM2 as a suitable dissimilarity measure for image retrieval and clustering.
- Description: Doctor of Philosophy
- Authors: Shojanazeri, Hamid
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Image retrieval and clustering are two important tools for analysing and organising images. Dissimilarity measure is central to both image retrieval and clustering. The performance of image retrieval and clustering algorithms depends on the effectiveness of the dissimilarity measure. ‘Minkowski’ distance, or more specifically, ‘Euclidean’ distance, is the most widely used dissimilarity measure in image retrieval and clustering. Euclidean distance depends only on the geometric position of two data instances in the feature space and completely ignores the data distribution. However, data distribution has an effect on human perception. The argument that two data instances in a dense area are more perceptually dissimilar than the same two instances in a sparser area, is proposed by psychologists. Based on this idea, a dissimilarity measure called, ‘mp’, has been proposed to address Euclidean distance’s limitation of ignoring the data distribution. Here, mp relies on data distribution to calculate the dissimilarity between two instances. As prescribed in mp, higher data mass between two data instances implies higher dissimilarity, and vice versa. mp relies only on data distribution and completely ignores the geometric distance in its calculations. In the aggregation of dissimilarities between two instances over all the dimensions in feature space, both Euclidean distance and mp give same priority to all the dimensions. This may result in a situation that the final dissimilarity between two data instances is determined by a few dimensions of feature vectors with relatively much higher values. As a result, the dissimilarity derived may not align well with human perception. The need to address the limitations of Minkowski distance measures, along with the importance of a dissimilarity measure that considers both geometric distance and the perceptual effect of data distribution in measuring dissimilarity between images motivated this thesis. It studies the performance of mp for image retrieval. It investigates a new dissimilarity measure that combines both Euclidean distance and data distribution. In addition to these, it studies the performance of such a dissimilarity measure for image retrieval and clustering. Our performance study of mp for image retrieval shows that relying only on data distribution to measure the dissimilarity results in some situations, where the mp’s measurement is contrary to human perception. This thesis introduces a new dissimilarity measure called, perceptual dissimilarity measure (PDM). PDM considers the perceptual effect of data distribution in combination with Euclidean distance. PDM has two variants, PDM1 and PDM2. PDM1 focuses on improving mp by weighting it using Euclidean distance in situations where mp may not retrieve accurate results. PDM2 considers the effect of data distribution on the perceived dissimilarity measured by Euclidean distance. PDM2 proposes a weighting system for Euclidean distance using a logarithmic transform of data mass. The proposed PDM variants have been used as alternatives to Euclidean distance and mp to improve the accuracy in image retrieval. Our results show that PDM2 has consistently performed the best, compared to Euclidean distance, mp and PDM1. PDM1’s performance was not consistent, although it has performed better than mp in all the experiments, but it could not outperform Euclidean distance in some cases. Following the promising results of PDM2 in image retrieval, we have studied its performance for image clustering. k-means is the most widely used clustering algorithm in scientific and industrial applications. k-medoids is the closest clustering algorithm to k-means. Unlike k-means which works only with Euclidean distance, k-medoids gives the option to choose the arbitrary dissimilarity measure. We have used Euclidean distance, mp and PDM2 as the dissimilarity measure in k-medoids and compared the results with k-means. Our clustering results show that PDM2 has perfromed overally the best. This confirms our retrieval results and identifies PDM2 as a suitable dissimilarity measure for image retrieval and clustering.
- 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
Detection and prevention of the dispersal of the seeds of Chilean needle grass (Nassella neesiana Trin. & Rupr. (Barkworth)) in hay bales
- Authors: Weller, Sandra
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Invasive and noxious weeds are well known as a pervasive problem, imposing significant economic burdens on all areas of agriculture, and thus their control and eradication are of central concern to the industry. Whilst there are multiple possible pathways of weed dispersal in this industry, of particular interest to this discussion is how the unintended dispersal of Chilean needle grass (Nassella neesiana) weed seeds, within emergency fodder, may be prevented. Periodic drought is a feature of the Australian climate, which, together with natural disasters of flood and bushfire, necessitates the urgent provision of emergency fodder for maintenance of livestock production. However, previous investigations into weed seed dispersal by this fodder type have revealed a significant risk for the dispersal of a number of noxious weeds well beyond their current range. Because preventive work, relating to detection and eradication of noxious species, is at an early stage of development, the development of faster, more reliable, and non-destructive sampling methods for seed species has become essential. In addition to prevention of weed seed dispersal in fodder, the use of appropriate methods of controlling troublesome pasture weeds in situ is of relevance for addressing established infestations. Whilst silage preservation is one such typical method that can reduce weed seed input into the soil seed bank, there is currently little data on the absolute effectiveness of this method for control of N. neesiana. To investigate whether rapid detection of seeds in bales is possible and how the numbers of seeds in a pasture are linked to the numbers of seeds that may be incorporated into hay bales made from an infested pasture, an investigation of a rapid, non-destructive technique to detect seeds in bales, together with an examination of a pasture to estimate seed density and dispersal prior to baling, were carried out. Additionally, since pastures infested with this weed are of no use for producing hay and little use for grazing, a third experiment was devised, which was an investigation of silaging for preventing inadvertent seed input into pasture soil seed banks. This thesis has shown that this approach of non-destructive core sampling of bales to detect the seeds of N. neesiana, and possibly others, which can be visually recognised, shows promise for those involved in weed control. Similarly, the simultaneous demonstration that silage fermentation is an efficient viable method for both eliminating viability of mature (germinable) seeds of this species while also reducing the probability of injury to livestock from these seeds, confirms that reducing the impact of this weed in agro-ecological systems and on livestock during emergency situations is possible.
- Description: Doctor of Philosophy
- Authors: Weller, Sandra
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Invasive and noxious weeds are well known as a pervasive problem, imposing significant economic burdens on all areas of agriculture, and thus their control and eradication are of central concern to the industry. Whilst there are multiple possible pathways of weed dispersal in this industry, of particular interest to this discussion is how the unintended dispersal of Chilean needle grass (Nassella neesiana) weed seeds, within emergency fodder, may be prevented. Periodic drought is a feature of the Australian climate, which, together with natural disasters of flood and bushfire, necessitates the urgent provision of emergency fodder for maintenance of livestock production. However, previous investigations into weed seed dispersal by this fodder type have revealed a significant risk for the dispersal of a number of noxious weeds well beyond their current range. Because preventive work, relating to detection and eradication of noxious species, is at an early stage of development, the development of faster, more reliable, and non-destructive sampling methods for seed species has become essential. In addition to prevention of weed seed dispersal in fodder, the use of appropriate methods of controlling troublesome pasture weeds in situ is of relevance for addressing established infestations. Whilst silage preservation is one such typical method that can reduce weed seed input into the soil seed bank, there is currently little data on the absolute effectiveness of this method for control of N. neesiana. To investigate whether rapid detection of seeds in bales is possible and how the numbers of seeds in a pasture are linked to the numbers of seeds that may be incorporated into hay bales made from an infested pasture, an investigation of a rapid, non-destructive technique to detect seeds in bales, together with an examination of a pasture to estimate seed density and dispersal prior to baling, were carried out. Additionally, since pastures infested with this weed are of no use for producing hay and little use for grazing, a third experiment was devised, which was an investigation of silaging for preventing inadvertent seed input into pasture soil seed banks. This thesis has shown that this approach of non-destructive core sampling of bales to detect the seeds of N. neesiana, and possibly others, which can be visually recognised, shows promise for those involved in weed control. Similarly, the simultaneous demonstration that silage fermentation is an efficient viable method for both eliminating viability of mature (germinable) seeds of this species while also reducing the probability of injury to livestock from these seeds, confirms that reducing the impact of this weed in agro-ecological systems and on livestock during emergency situations is possible.
- Description: Doctor of Philosophy
The determinants of capital structure in Chinese listed companies
- Authors: Shen, Gensheng
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Traditional financial theories see capital structure as a result of mainly financial, tax and growth factors (Modigliani & Miller, 1958). But corporate governance theories (Jensen & Meckling, 1976) and business strategy theories (Barton & Gordon, 1988) suggest that ownership structure and ownership concentration, product diversification and asset specificity may also influence capital structure. Focusing on the examination of the determinants of capital structure in Chinese listed companies, this research goes beyond financial factors and considered business strategy and corporate governance approaches, and their impact on capital structure, in a transitioning Chinese context where institutions, expertise and regulatory processes are different to, but converging on, Western approaches. A panel data set of 1,098 Chinese listed companies for the period of 1991 to 2000 was collected from published sources, and conventional and innovative econometric methodologies were used to model a range of relationships between capital structure and its financial and non-financial determinants. The statistical approaches used in this study included Ordinary Least Squares Model and also Linear Mixed Model, which is a powerful tool to examine panel data where independence of explanatory variables is not assumed. The analysis also involved Hox’s model building procedures to measure model fit. The capital structure of listed companies in both the Shenzhen Stock Exchange and the Shanghai Securities Exchange is positively related to a firm’s tax rate, growth and capital intensity and negatively related to a firm’s profit and size. Other financial factors such as tangibility, risk and duration are non-significant. The capital structure of listed companies, particularly in the Shenzhen Stock Exchange, is positively related to product diversification and negatively related to asset specificity. The capital structure of listed companies in the Shanghai Securities Exchange is positively related to government ownership and ownership concentration of the largest shareholder and negatively related to legal person ownership and ownership concentration of the ten largest shareholders. The data and modelling support financial and non-financial determinants of capital structure. In particular, information asymmetry, business diversity and asset specificity have a significant impact on capital structure. In addition the empirical work in the study supports agency cost explanations of debt and equity. Finally the research demonstrates that the two main financial markets in China, Shenzhen and Shanghai, have operated differently but are converging towards a common norm. The research contributes to the general field of capital structure and provides valuable insights into the nature of the Chinese firm and the evolution of the Chinese financial system.
- Description: Doctor of Philosophy
- Description: 2003006320
- Authors: Shen, Gensheng
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Traditional financial theories see capital structure as a result of mainly financial, tax and growth factors (Modigliani & Miller, 1958). But corporate governance theories (Jensen & Meckling, 1976) and business strategy theories (Barton & Gordon, 1988) suggest that ownership structure and ownership concentration, product diversification and asset specificity may also influence capital structure. Focusing on the examination of the determinants of capital structure in Chinese listed companies, this research goes beyond financial factors and considered business strategy and corporate governance approaches, and their impact on capital structure, in a transitioning Chinese context where institutions, expertise and regulatory processes are different to, but converging on, Western approaches. A panel data set of 1,098 Chinese listed companies for the period of 1991 to 2000 was collected from published sources, and conventional and innovative econometric methodologies were used to model a range of relationships between capital structure and its financial and non-financial determinants. The statistical approaches used in this study included Ordinary Least Squares Model and also Linear Mixed Model, which is a powerful tool to examine panel data where independence of explanatory variables is not assumed. The analysis also involved Hox’s model building procedures to measure model fit. The capital structure of listed companies in both the Shenzhen Stock Exchange and the Shanghai Securities Exchange is positively related to a firm’s tax rate, growth and capital intensity and negatively related to a firm’s profit and size. Other financial factors such as tangibility, risk and duration are non-significant. The capital structure of listed companies, particularly in the Shenzhen Stock Exchange, is positively related to product diversification and negatively related to asset specificity. The capital structure of listed companies in the Shanghai Securities Exchange is positively related to government ownership and ownership concentration of the largest shareholder and negatively related to legal person ownership and ownership concentration of the ten largest shareholders. The data and modelling support financial and non-financial determinants of capital structure. In particular, information asymmetry, business diversity and asset specificity have a significant impact on capital structure. In addition the empirical work in the study supports agency cost explanations of debt and equity. Finally the research demonstrates that the two main financial markets in China, Shenzhen and Shanghai, have operated differently but are converging towards a common norm. The research contributes to the general field of capital structure and provides valuable insights into the nature of the Chinese firm and the evolution of the Chinese financial system.
- Description: Doctor of Philosophy
- Description: 2003006320
Teachers' emotional intelligence as a predisposition for discrimiation against students with severe emotional and behavioural disorders
- Authors: Metaxas, Melinda
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Students with Emotional Behavioural Disorders (EBD) are among the most challenging students to teach. Personality Trait Theory predicts teachers’ level of Emotional Intelligence (EI) would affect their cognitive-affective-behavioural reactions towards students with EBDs, and influence level of academic achievement and difficult behaviour of these students. This research explores which teachers are more predisposed to discriminate against EBD students, and identifies the most ‘effective’, supportive EI teacher traits. Underlying psychological processes, such as genetic EI make-up of teachers, may prove to be most valuable in determining whether more practical strategies for dealing with students’ behaviour/emotions are effectively applied and successful. An Attribution Model framework helped assess teacher reactions towards students. Two hundred and sixty one teachers from 51 Victorian schools participated in the study by completing self-report questionnaires, including the Trait Emotional Intelligence Questionnaire. A quantitative survey methodology used vignettes, with each school contact person randomly giving 50/50 surveys to their teachers (depicting a student with either mild or severe EBD symptoms). Pathway analysis revealed that teachers with higher EI reported less stigmatising and punitive intentions and likely greater helping behaviours. A new EI Process Model of Stigmatisation was proposed to measure teacher reactions through an affective-cognitive-behavioural sequence, rather than a cognitive-affective-behavioural sequence. Teachers’ EI levels also related to their own levels of psychological distress and/or compassion stress, which influenced likely helping or punitive outcomes. Despite behavioural severity of EBD students, teachers higher in EI still indicate more supportive helping behaviours. Specifically-identified ‘ideal’ teacher EI traits should lead to greater helping and be psychologically beneficial to both students and teachers. These results assisted development of an assessment tool (ASET – Assessment Screen for Emotionally Intelligent Teachers), which lays a sound foundation for schools and others to profile or recruit teachers with best ‘qualities’ to effectively teach students EBD students.
- Description: Doctor of Philosophy
- Authors: Metaxas, Melinda
- Date: 2018
- Type: Text , Thesis , PhD
- Full Text:
- Description: Students with Emotional Behavioural Disorders (EBD) are among the most challenging students to teach. Personality Trait Theory predicts teachers’ level of Emotional Intelligence (EI) would affect their cognitive-affective-behavioural reactions towards students with EBDs, and influence level of academic achievement and difficult behaviour of these students. This research explores which teachers are more predisposed to discriminate against EBD students, and identifies the most ‘effective’, supportive EI teacher traits. Underlying psychological processes, such as genetic EI make-up of teachers, may prove to be most valuable in determining whether more practical strategies for dealing with students’ behaviour/emotions are effectively applied and successful. An Attribution Model framework helped assess teacher reactions towards students. Two hundred and sixty one teachers from 51 Victorian schools participated in the study by completing self-report questionnaires, including the Trait Emotional Intelligence Questionnaire. A quantitative survey methodology used vignettes, with each school contact person randomly giving 50/50 surveys to their teachers (depicting a student with either mild or severe EBD symptoms). Pathway analysis revealed that teachers with higher EI reported less stigmatising and punitive intentions and likely greater helping behaviours. A new EI Process Model of Stigmatisation was proposed to measure teacher reactions through an affective-cognitive-behavioural sequence, rather than a cognitive-affective-behavioural sequence. Teachers’ EI levels also related to their own levels of psychological distress and/or compassion stress, which influenced likely helping or punitive outcomes. Despite behavioural severity of EBD students, teachers higher in EI still indicate more supportive helping behaviours. Specifically-identified ‘ideal’ teacher EI traits should lead to greater helping and be psychologically beneficial to both students and teachers. These results assisted development of an assessment tool (ASET – Assessment Screen for Emotionally Intelligent Teachers), which lays a sound foundation for schools and others to profile or recruit teachers with best ‘qualities’ to effectively teach students EBD students.
- Description: Doctor of Philosophy
Personality disorders in clinical practice : Axis 1 comorbidity, management/treatment, psychologist boundary issues and self-care
- Authors: Grech, Paul
- Date: 2003
- Type: Text , Thesis , PhD
- Full Text:
- Description: Three thematically linked placement project reports and an exegesis addressing professional/ethical issues in the practice of clinical psychology submitted in partial fulfilment of the requirements for the degree of Doctor of Psychology (Clinical).
- Description: Doctor of Psychology (Clinical)
- Authors: Grech, Paul
- Date: 2003
- Type: Text , Thesis , PhD
- Full Text:
- Description: Three thematically linked placement project reports and an exegesis addressing professional/ethical issues in the practice of clinical psychology submitted in partial fulfilment of the requirements for the degree of Doctor of Psychology (Clinical).
- Description: Doctor of Psychology (Clinical)
A three tier forensic model for automatic identification of evidence of child exploitation by analysing the content of chat-logs
- Authors: Miah, Md Waliur Rahman
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Detection of child exploitation (CE) in Internet chatting by locating evidence in the chat-log is an important issue for the protection of children from prospective online paedophiles. The un-grammatical and informal nature of chat-text makes it difficult for existing formal language processing techniques to handle the problem. The methodology of the current research avoids those difficulties by developing a multi-tier digital forensic model bulit on new ideas of psychological similarity measures and ways of applying them to chat-texts. The model uses text classifiers in the beginning to identify shallow evidence of CE. For locating the particular evidence it is required to identify the behavioural pattern of CE chats consisting of documented CE psychological stages and associate the perpetrators' posts to them. Similarities among the posts of a chat play an important role for the task of differentiating and identifying these stages. To accomplish this task a novel similarity measure is constructed backed by a dictionary with terms associated with each CE stage. Using the new similarity measure is constructed backed by a dictionary with terms associated with each CE stage. Using the new similarity measure in a hieraarchial agglomerative algoritm a new clusterer is built to cluster the posts of a chat-log into the CE stages to learn whether it follows the CE pattern. Inspired by the field of recognition of textual entailment a new soft entailment technique is developed and implemented to locate the specific posts associated with the CE stages. Those specific posts of the perpetrator are extarcted as the particular evidence from the chat-log. It is anticipated that the developed methodology will have many future pratical implementations. It would assist in the development of forensic tools for digital forensic experts in law and enforcement agencies to conveniently locate evidence of online child grooming in a confiscated hard disk drive. Another future implementation would be a parental filter used by parents to protect their children from potential online offenders.
- Description: Doctor of Philosphy
- Authors: Miah, Md Waliur Rahman
- Date: 2016
- Type: Text , Thesis , PhD
- Full Text:
- Description: Detection of child exploitation (CE) in Internet chatting by locating evidence in the chat-log is an important issue for the protection of children from prospective online paedophiles. The un-grammatical and informal nature of chat-text makes it difficult for existing formal language processing techniques to handle the problem. The methodology of the current research avoids those difficulties by developing a multi-tier digital forensic model bulit on new ideas of psychological similarity measures and ways of applying them to chat-texts. The model uses text classifiers in the beginning to identify shallow evidence of CE. For locating the particular evidence it is required to identify the behavioural pattern of CE chats consisting of documented CE psychological stages and associate the perpetrators' posts to them. Similarities among the posts of a chat play an important role for the task of differentiating and identifying these stages. To accomplish this task a novel similarity measure is constructed backed by a dictionary with terms associated with each CE stage. Using the new similarity measure is constructed backed by a dictionary with terms associated with each CE stage. Using the new similarity measure in a hieraarchial agglomerative algoritm a new clusterer is built to cluster the posts of a chat-log into the CE stages to learn whether it follows the CE pattern. Inspired by the field of recognition of textual entailment a new soft entailment technique is developed and implemented to locate the specific posts associated with the CE stages. Those specific posts of the perpetrator are extarcted as the particular evidence from the chat-log. It is anticipated that the developed methodology will have many future pratical implementations. It would assist in the development of forensic tools for digital forensic experts in law and enforcement agencies to conveniently locate evidence of online child grooming in a confiscated hard disk drive. Another future implementation would be a parental filter used by parents to protect their children from potential online offenders.
- Description: Doctor of Philosphy
Regulatory network discovery using heuristics
- Authors: Zarnegar, Armita
- Date: 2011
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis improves the GRN discovery process by integrating heuristic information via a co-regulation function, a post-processing procedure, and a Hub Network algorithm to build the backbone of the network.
- Description: Doctor of Philosophy
- Authors: Zarnegar, Armita
- Date: 2011
- Type: Text , Thesis , PhD
- Full Text:
- Description: This thesis improves the GRN discovery process by integrating heuristic information via a co-regulation function, a post-processing procedure, and a Hub Network algorithm to build the backbone of the network.
- 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
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