A locale of the cosmos : an epic of the Wimmera : exegesis and text
- Authors: Rieth, Homer Manfred
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: "This project has, for its central component, an epic poem, 'A locale of the cosmos'. The accompanying exegesis examines epic as an ancient, but continually evolving form. It argues that, as a contemporary example of the genre and, as a sustained poetic rumination on landscape and memory, 'A locale of the cosmos' represents a significant development within the modern tradition of autobiographical epic. In broader terms, 'A locale of the cosmos' privileges the landscape and history of a region of Australia, the Wimmera region of north-western Victoria and, in doing so, explores the cumulative effects of the physical environment as a site for sustained poetic treatment. The poem is, therefore, an epic of both historical narrative and philosophical reflection, giving meaning to and interpreting ideas of space, place and locale. "Furthermore, it explores, in particular, the psychological and spiritual effects of vast horizontal distances, created by a landscape in which endless plains and immense horizons form an analogue of the wider cosmos. The poem's themes, therefore, bear not only on the prominences of the visible locale, but also explore the salients of an interior world, a landscape of the mind to which the poetry gives shape and meaning."
- Description: Doctor of Philosophy
- Authors: Rieth, Homer Manfred
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: "This project has, for its central component, an epic poem, 'A locale of the cosmos'. The accompanying exegesis examines epic as an ancient, but continually evolving form. It argues that, as a contemporary example of the genre and, as a sustained poetic rumination on landscape and memory, 'A locale of the cosmos' represents a significant development within the modern tradition of autobiographical epic. In broader terms, 'A locale of the cosmos' privileges the landscape and history of a region of Australia, the Wimmera region of north-western Victoria and, in doing so, explores the cumulative effects of the physical environment as a site for sustained poetic treatment. The poem is, therefore, an epic of both historical narrative and philosophical reflection, giving meaning to and interpreting ideas of space, place and locale. "Furthermore, it explores, in particular, the psychological and spiritual effects of vast horizontal distances, created by a landscape in which endless plains and immense horizons form an analogue of the wider cosmos. The poem's themes, therefore, bear not only on the prominences of the visible locale, but also explore the salients of an interior world, a landscape of the mind to which the poetry gives shape and meaning."
- Description: Doctor of Philosophy
A longitudinal study of trauma, social and personality factors as predictors of post-traumatic stress symptom severity in student paramedics
- Authors: Armstrong, Kim Maree
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Previous research suggests student paramedics are among the professionals at highest risk of post-traumatic stress disorder (PTSD). However, little research has been conducted examining duty-related post-traumatic stress symptoms (PTSS) and clinical levels of PTSD in this poplulation. The current study of 36 student paramedics undertaking university or job-based training is the first longitudinal investigation of PTSS and PTSD in this group.
- Description: Professional Doctorate of Psychology (Clinical)
- Authors: Armstrong, Kim Maree
- Date: 2008
- Type: Text , Thesis , PhD
- Full Text:
- Description: Previous research suggests student paramedics are among the professionals at highest risk of post-traumatic stress disorder (PTSD). However, little research has been conducted examining duty-related post-traumatic stress symptoms (PTSS) and clinical levels of PTSD in this poplulation. The current study of 36 student paramedics undertaking university or job-based training is the first longitudinal investigation of PTSS and PTSD in this group.
- Description: Professional Doctorate of Psychology (Clinical)
A methodology for the analysis of interactive narrative environments : a four-factor framework
- Authors: Macfadyen, Alyx
- Date: 2009
- Type: Thesis , PhD
- Full Text:
- Description: Stories have been engaging humans for thousands of years, but in interactive narrative environments, the narrative is perceived to diminish as the source of engagement. One reason for this apparent diminution, is that in interactive environments there has been difficulty in understanding the relationship between design of the unfolding story, and the ability of a user within the story to alter the course of events. As yet there are no standard or accepted evaluative methods to understand interaction at a granular level, and to understand how stories and narratives flow across the expanse of technologies and mixed realities that characterise the way people communicate, share knowledge and are entertained. This thesis presents a novel methodology called the Four-Factor Framework, that takes as its premise that there are four fundamental elements in interactive stories and narratives that can be observed.
- Description: Doctor of Philosophy
- Authors: Macfadyen, Alyx
- Date: 2009
- Type: Thesis , PhD
- Full Text:
- Description: Stories have been engaging humans for thousands of years, but in interactive narrative environments, the narrative is perceived to diminish as the source of engagement. One reason for this apparent diminution, is that in interactive environments there has been difficulty in understanding the relationship between design of the unfolding story, and the ability of a user within the story to alter the course of events. As yet there are no standard or accepted evaluative methods to understand interaction at a granular level, and to understand how stories and narratives flow across the expanse of technologies and mixed realities that characterise the way people communicate, share knowledge and are entertained. This thesis presents a novel methodology called the Four-Factor Framework, that takes as its premise that there are four fundamental elements in interactive stories and narratives that can be observed.
- Description: Doctor of Philosophy
A multi-proxy approach to track ecological change in Gunbower Wetlands, Victoria, Australia
- Authors: Mall, Neeraj
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The wetlands of the Murray-Darling Basin have come under the threat of a drying climate, the over-allocation of water for irrigation agriculture and widespread catchment disturbance. A synthesis of many paleolimnological assessments undertaken in the upper and lower sections of the Murray floodplain, and the Murrumbidgee, reveal considerable ecological change in wetlands from early in European settlement. The wetlands of the Gunbower Forest lie in the middle reaches of the Murray River. They are located on Gunbower Island that is deemed a wetland of international significance under the Ramsar Convention and an icon site under the Living Murray Initiative. Many Gunbower Island wetlands are located in protected forests, while others are within a zone developed for irrigation, mostly dairy, agriculture. This study analysed the sedimentary records of two wetlands within the forest estate and two within irrigation lands intending to compare long term change in the Gunbower wetlands to studies on floodplains both up and downstream, and to assess the relative impact of regional causes of change and that of local land use. Sediments constitute natural archives of past environmental changes. Sediment records were recovered from four wetlands and radiometric dating and multi-proxy paleoecological techniques were applied to assess how these wetlands have responded to changes in human occupation and other factors, such as climate. Then, extracted sediment cores were taken from Black (core length: 84 cm) and Green (86 cm) Swamps located in the forest, and Taylors (94 cm) and Cockatoo (74 cm) Lagoons were situated amongst dairy farms. In order to reconstruct ecological and water quality changes from the study sites, the cores were analysed using four different analysis techniques, i.e., Itrax-XRF (X-Ray Fluorescence) scanning, Lead-210 (210Pb) dating, Stable isotope and diatom analysis. XRF scanning provided evidence of the elemental composition of the cores. Detrital enrichment in the lower parts of all cores was observed, indicating elevated erosion rates or low water levels. In addition to this, some recent metal pollution was evident with high Cu, Ni and Pb inputs. Stable isotopes provided limited information on the carbon and nitrogen sources. The
- Description: Doctor of Philosophy
- Authors: Mall, Neeraj
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: The wetlands of the Murray-Darling Basin have come under the threat of a drying climate, the over-allocation of water for irrigation agriculture and widespread catchment disturbance. A synthesis of many paleolimnological assessments undertaken in the upper and lower sections of the Murray floodplain, and the Murrumbidgee, reveal considerable ecological change in wetlands from early in European settlement. The wetlands of the Gunbower Forest lie in the middle reaches of the Murray River. They are located on Gunbower Island that is deemed a wetland of international significance under the Ramsar Convention and an icon site under the Living Murray Initiative. Many Gunbower Island wetlands are located in protected forests, while others are within a zone developed for irrigation, mostly dairy, agriculture. This study analysed the sedimentary records of two wetlands within the forest estate and two within irrigation lands intending to compare long term change in the Gunbower wetlands to studies on floodplains both up and downstream, and to assess the relative impact of regional causes of change and that of local land use. Sediments constitute natural archives of past environmental changes. Sediment records were recovered from four wetlands and radiometric dating and multi-proxy paleoecological techniques were applied to assess how these wetlands have responded to changes in human occupation and other factors, such as climate. Then, extracted sediment cores were taken from Black (core length: 84 cm) and Green (86 cm) Swamps located in the forest, and Taylors (94 cm) and Cockatoo (74 cm) Lagoons were situated amongst dairy farms. In order to reconstruct ecological and water quality changes from the study sites, the cores were analysed using four different analysis techniques, i.e., Itrax-XRF (X-Ray Fluorescence) scanning, Lead-210 (210Pb) dating, Stable isotope and diatom analysis. XRF scanning provided evidence of the elemental composition of the cores. Detrital enrichment in the lower parts of all cores was observed, indicating elevated erosion rates or low water levels. In addition to this, some recent metal pollution was evident with high Cu, Ni and Pb inputs. Stable isotopes provided limited information on the carbon and nitrogen sources. The
- Description: Doctor of Philosophy
A neural network approach for predicting the direction of the Australian stock market index
- Authors: Tilakaratne, Chandima
- Date: 2004
- Type: Text , Thesis , Masters
- Full Text:
- Description: This research investigated the feasibility and capability of neural network-based approaches for predicting the direction of the Australian Stock market index (the target market). It includes several aspects: univariate feature selection from the historical time series of the target market, inter-market analysis for finding the most relevant influential markets, investigations of the effect of time cycles on the target market and the discovery of the optimal neural network architectures. Previous research on US stock markets and other international markets have shown that the neural network approach is one of most powerful techniques for predicting stock market behaviour. Neural networks are capable of capturing the non-linear stochastic and chaotic patterns in the stock market time series data. This study discovered that the relative return series of the Open, High, Low and Close prices of the target market, show 6-day cycles during the studied period of about 14 years. Multi-layer feedforward neural networks trained with a backpropagation algorithm were used for the experiments. Two major testing methods: testing with randomly selected test data and forward testing, were examined and compared. The best neural network developed in this study has achieved 87%, 81% 83% and 81% accuracy respectively in predicting the next-day direction of the relative return of the Open, High, Low and Close prices of the target market. The architecture of this network consists of 33 input features, one hidden layer with 3 neurons and 4 output neurons. The best input features set includes the relative returns from 1 to 6 days in the past of the Open, High, Low and Close prices of the target market, the day of the week, and the previous day’s relative return of the Close prices of the US S&P 500 Index, US Dow Jones Industrial Average Index, US Gold/Silver Index, and the US Oil Index.
- Description: Master of Information Technology by Research
- Authors: Tilakaratne, Chandima
- Date: 2004
- Type: Text , Thesis , Masters
- Full Text:
- Description: This research investigated the feasibility and capability of neural network-based approaches for predicting the direction of the Australian Stock market index (the target market). It includes several aspects: univariate feature selection from the historical time series of the target market, inter-market analysis for finding the most relevant influential markets, investigations of the effect of time cycles on the target market and the discovery of the optimal neural network architectures. Previous research on US stock markets and other international markets have shown that the neural network approach is one of most powerful techniques for predicting stock market behaviour. Neural networks are capable of capturing the non-linear stochastic and chaotic patterns in the stock market time series data. This study discovered that the relative return series of the Open, High, Low and Close prices of the target market, show 6-day cycles during the studied period of about 14 years. Multi-layer feedforward neural networks trained with a backpropagation algorithm were used for the experiments. Two major testing methods: testing with randomly selected test data and forward testing, were examined and compared. The best neural network developed in this study has achieved 87%, 81% 83% and 81% accuracy respectively in predicting the next-day direction of the relative return of the Open, High, Low and Close prices of the target market. The architecture of this network consists of 33 input features, one hidden layer with 3 neurons and 4 output neurons. The best input features set includes the relative returns from 1 to 6 days in the past of the Open, High, Low and Close prices of the target market, the day of the week, and the previous day’s relative return of the Close prices of the US S&P 500 Index, US Dow Jones Industrial Average Index, US Gold/Silver Index, and the US Oil Index.
- Description: Master of Information Technology by Research
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
A new ramp metering control algorithm for optimizing freeway travel times
- Authors: Lierkamp, Darren
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: "In many cities around the world traffic congestion has been increasing faster than can be dealt with by new road construction. To resolve this problem traffic management devices and technology such as ramp meters are increasingly being utilized."--leaf 1.
- Description: Masters of Information Technology
- Authors: Lierkamp, Darren
- Date: 2006
- Type: Text , Thesis , PhD
- Full Text:
- Description: "In many cities around the world traffic congestion has been increasing faster than can be dealt with by new road construction. To resolve this problem traffic management devices and technology such as ramp meters are increasingly being utilized."--leaf 1.
- Description: Masters of Information Technology
A patient agent controlled customized blockchain based framework for internet of things
- Authors: Uddin, Md Ashraf
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Although Blockchain implementations have emerged as revolutionary technologies for various industrial applications including cryptocurrencies, they have not been widely deployed to store data streaming from sensors to remote servers in architectures known as Internet of Things. New Blockchain for the Internet of Things models promise secure solutions for eHealth, smart cities, and other applications. These models pave the way for continuous monitoring of patient’s physiological signs with wearable sensors to augment traditional medical practice without recourse to storing data with a trusted authority. However, existing Blockchain algorithms cannot accommodate the huge volumes, security, and privacy requirements of health data. In this thesis, our first contribution is an End-to-End secure eHealth architecture that introduces an intelligent Patient Centric Agent. The Patient Centric Agent executing on dedicated hardware manages the storage and access of streams of sensors generated health data, into a customized Blockchain and other less secure repositories. As IoT devices cannot host Blockchain technology due to their limited memory, power, and computational resources, the Patient Centric Agent coordinates and communicates with a private customized Blockchain on behalf of the wearable devices. While the adoption of a Patient Centric Agent offers solutions for addressing continuous monitoring of patients’ health, dealing with storage, data privacy and network security issues, the architecture is vulnerable to Denial of Services(DoS) and single point of failure attacks. To address this issue, we advance a second contribution; a decentralised eHealth system in which the Patient Centric Agent is replicated at three levels: Sensing Layer, NEAR Processing Layer and FAR Processing Layer. The functionalities of the Patient Centric Agent are customized to manage the tasks of the three levels. Simulations confirm protection of the architecture against DoS attacks. Few patients require all their health data to be stored in Blockchain repositories but instead need to select an appropriate storage medium for each chunk of data by matching their personal needs and preferences with features of candidate storage mediums. Motivated by this context, we advance third contribution; a recommendation model for health data storage that can accommodate patient preferences and make storage decisions rapidly, in real-time, even with streamed data. The mapping between health data features and characteristics of each repository is learned using machine learning. The Blockchain’s capacity to make transactions and store records without central oversight enables its application for IoT networks outside health such as underwater IoT networks where the unattended nature of the nodes threatens their security and privacy. However, underwater IoT differs from ground IoT as acoustics signals are the communication media leading to high propagation delays, high error rates exacerbated by turbulent water currents. Our fourth contribution is a customized Blockchain leveraged framework with the model of Patient-Centric Agent renamed as Smart Agent for securely monitoring underwater IoT. Finally, the smart Agent has been investigated in developing an IoT smart home or cities monitoring framework. The key algorithms underpinning to each contribution have been implemented and analysed using simulators.
- Description: Doctor of Philosophy
- Authors: Uddin, Md Ashraf
- Date: 2021
- Type: Text , Thesis , PhD
- Full Text:
- Description: Although Blockchain implementations have emerged as revolutionary technologies for various industrial applications including cryptocurrencies, they have not been widely deployed to store data streaming from sensors to remote servers in architectures known as Internet of Things. New Blockchain for the Internet of Things models promise secure solutions for eHealth, smart cities, and other applications. These models pave the way for continuous monitoring of patient’s physiological signs with wearable sensors to augment traditional medical practice without recourse to storing data with a trusted authority. However, existing Blockchain algorithms cannot accommodate the huge volumes, security, and privacy requirements of health data. In this thesis, our first contribution is an End-to-End secure eHealth architecture that introduces an intelligent Patient Centric Agent. The Patient Centric Agent executing on dedicated hardware manages the storage and access of streams of sensors generated health data, into a customized Blockchain and other less secure repositories. As IoT devices cannot host Blockchain technology due to their limited memory, power, and computational resources, the Patient Centric Agent coordinates and communicates with a private customized Blockchain on behalf of the wearable devices. While the adoption of a Patient Centric Agent offers solutions for addressing continuous monitoring of patients’ health, dealing with storage, data privacy and network security issues, the architecture is vulnerable to Denial of Services(DoS) and single point of failure attacks. To address this issue, we advance a second contribution; a decentralised eHealth system in which the Patient Centric Agent is replicated at three levels: Sensing Layer, NEAR Processing Layer and FAR Processing Layer. The functionalities of the Patient Centric Agent are customized to manage the tasks of the three levels. Simulations confirm protection of the architecture against DoS attacks. Few patients require all their health data to be stored in Blockchain repositories but instead need to select an appropriate storage medium for each chunk of data by matching their personal needs and preferences with features of candidate storage mediums. Motivated by this context, we advance third contribution; a recommendation model for health data storage that can accommodate patient preferences and make storage decisions rapidly, in real-time, even with streamed data. The mapping between health data features and characteristics of each repository is learned using machine learning. The Blockchain’s capacity to make transactions and store records without central oversight enables its application for IoT networks outside health such as underwater IoT networks where the unattended nature of the nodes threatens their security and privacy. However, underwater IoT differs from ground IoT as acoustics signals are the communication media leading to high propagation delays, high error rates exacerbated by turbulent water currents. Our fourth contribution is a customized Blockchain leveraged framework with the model of Patient-Centric Agent renamed as Smart Agent for securely monitoring underwater IoT. Finally, the smart Agent has been investigated in developing an IoT smart home or cities monitoring framework. The key algorithms underpinning to each contribution have been implemented and analysed using simulators.
- Description: Doctor of Philosophy
A philosophical analysis of the functions and operation of due process in accounting standard setting in Australia
- Authors: Mehta, Surinder
- Date: 2016
- Type: Text , Thesis , Masters
- Full Text:
- Description: The setting of accounting standards in the Australian context has undergone significant change over the past few decades because of both the introduction of international accounting standards and the outcomes of the Corporate Law Economic Reform Program (CLERP). One major thrust of these reforms was to widen the breadth of participation and to introduce new voices into the Australian accounting standard setting regime. Though there have been recent changes to Australian accounting standard setting arrangements, due process still remains as the underlying procedure for incorporating stakeholder participation. Standard setting resides within a socio-political and economic realm which lies between a capitalistic economic individualism premised upon self-interest and interest group preferences, and an idealistic paradigm of the public interest (common good). Both notions are espoused within modern civil society and present in the formulation of policy and regulation through participation. Recent times have seen the promulgation of accounting standards given over by delegated legislation to private sector interests who compete for desired outcomes and more recently this has been entrenched within the International Accounting Standards Board (IASB) which produces International Financial Reporting Standards (IFRS). This research presents a two-fold investigation of the due process which is applied when developing accounting standards in Australia. Firstly, this study questions whether such standards provide an adequate avenue for incorporating both appropriate attributes of participation and accountability in line with the historical understanding of due process as developed through common law. Secondly, this study questions whether such standards provide an appropriate vehicle for widening participation by introducing new voices into the Australian accounting standard setting process. On the former question, common law due process resonates within a paradigm that supports fair dealing and equity between individuals with themselves and with government. On the latter question, this research identifies low and declining stakeholder participation within the due process of accounting standard setting. This is accompanied by the declining interest of previous major participants. In examining the longitudinal participation trends of submitters to the accounting standard setting regime, this research contends that the due process finds itself embedded within the confines of a procedural construct to the detriment of accommodating natural justice through a more enlightened substantive approach. As such, when considered in light of its common law roots, it fails both to provide an adequate level of openness along with accommodating only a limited opportunity to participate, specifically when taking into account opinions and interests. The very construct of common law due process rests upon its ability both to subsume participation within the decision-making process, and for that participation to be substantive in the outcome of the process. That is, such participation gives meaning to the outcome. Instead the current due process as applied within the accounting standard setting environment resonates such participation through abolitionist type approaches. Here self-interested parties compete for advantages from property rights and private benefits in line with the more modern interpretation of the public interest. The approach taken in this thesis is to consider the due process from a philosophical perspective by assessing the questions of accountability and participation within the due process in terms of civil society, the public good, economic individualism, libertarianism, liberalism, and agency, rather than to embed the discussion within the expansive existing studies concerning due process in the accounting standard setting process. The conclusion from this perspective is that due process is clearly a process past its due date.
- Description: Masters by Research
- Authors: Mehta, Surinder
- Date: 2016
- Type: Text , Thesis , Masters
- Full Text:
- Description: The setting of accounting standards in the Australian context has undergone significant change over the past few decades because of both the introduction of international accounting standards and the outcomes of the Corporate Law Economic Reform Program (CLERP). One major thrust of these reforms was to widen the breadth of participation and to introduce new voices into the Australian accounting standard setting regime. Though there have been recent changes to Australian accounting standard setting arrangements, due process still remains as the underlying procedure for incorporating stakeholder participation. Standard setting resides within a socio-political and economic realm which lies between a capitalistic economic individualism premised upon self-interest and interest group preferences, and an idealistic paradigm of the public interest (common good). Both notions are espoused within modern civil society and present in the formulation of policy and regulation through participation. Recent times have seen the promulgation of accounting standards given over by delegated legislation to private sector interests who compete for desired outcomes and more recently this has been entrenched within the International Accounting Standards Board (IASB) which produces International Financial Reporting Standards (IFRS). This research presents a two-fold investigation of the due process which is applied when developing accounting standards in Australia. Firstly, this study questions whether such standards provide an adequate avenue for incorporating both appropriate attributes of participation and accountability in line with the historical understanding of due process as developed through common law. Secondly, this study questions whether such standards provide an appropriate vehicle for widening participation by introducing new voices into the Australian accounting standard setting process. On the former question, common law due process resonates within a paradigm that supports fair dealing and equity between individuals with themselves and with government. On the latter question, this research identifies low and declining stakeholder participation within the due process of accounting standard setting. This is accompanied by the declining interest of previous major participants. In examining the longitudinal participation trends of submitters to the accounting standard setting regime, this research contends that the due process finds itself embedded within the confines of a procedural construct to the detriment of accommodating natural justice through a more enlightened substantive approach. As such, when considered in light of its common law roots, it fails both to provide an adequate level of openness along with accommodating only a limited opportunity to participate, specifically when taking into account opinions and interests. The very construct of common law due process rests upon its ability both to subsume participation within the decision-making process, and for that participation to be substantive in the outcome of the process. That is, such participation gives meaning to the outcome. Instead the current due process as applied within the accounting standard setting environment resonates such participation through abolitionist type approaches. Here self-interested parties compete for advantages from property rights and private benefits in line with the more modern interpretation of the public interest. The approach taken in this thesis is to consider the due process from a philosophical perspective by assessing the questions of accountability and participation within the due process in terms of civil society, the public good, economic individualism, libertarianism, liberalism, and agency, rather than to embed the discussion within the expansive existing studies concerning due process in the accounting standard setting process. The conclusion from this perspective is that due process is clearly a process past its due date.
- Description: Masters by Research
A polarographic study of lignin reactions in soda pulping liquors
- Authors: Burton, Peter
- Date: 1986
- Type: Text , Thesis , Masters
- Full Text: false
- Description: Oxidation-reduction reactions between carbohydrates, lignin and quinone additives in Pinus radiata soda pulping liquors have been investigated. A reduction peak at -0.72 V (Vs SCE) was observed using differential pulse polarography when Pinus radiata wood is heated in alkaline solution in the presence of oxygen, and has been shown to result from the oxidation of lignin structures. The results of this study indicate that the electroactive species present in Pinus radiata soda pulping liquors is an oxidation product, resulting from the formation of phenoxy radicals and /or quinone methides. Although reduction potentials for anthraquinone, carbohydrates and the electroactive lignin structure fit the general redox mechanism propsed for accelerated delignification, the species observed by polarography in this study has been shown not to be involved in the main pulping reactions due to its low concentration.
- Description: Master of Applied Science
- Authors: Burton, Peter
- Date: 1986
- Type: Text , Thesis , Masters
- Full Text: false
- Description: Oxidation-reduction reactions between carbohydrates, lignin and quinone additives in Pinus radiata soda pulping liquors have been investigated. A reduction peak at -0.72 V (Vs SCE) was observed using differential pulse polarography when Pinus radiata wood is heated in alkaline solution in the presence of oxygen, and has been shown to result from the oxidation of lignin structures. The results of this study indicate that the electroactive species present in Pinus radiata soda pulping liquors is an oxidation product, resulting from the formation of phenoxy radicals and /or quinone methides. Although reduction potentials for anthraquinone, carbohydrates and the electroactive lignin structure fit the general redox mechanism propsed for accelerated delignification, the species observed by polarography in this study has been shown not to be involved in the main pulping reactions due to its low concentration.
- Description: Master of Applied Science
A program visualisation meta language
- Authors: Stratton, David
- Date: 2003
- Type: Text , Thesis , PhD
- Full Text:
- Description: The principle motivation of this work is to define an open PV architecture that will enable a variety of visualisation schemes to interoperate and that will encourage the generation of PV systems and research into their efficacy. Ultimately this may lead to more effective pedagogy in the field of computer programming and hence remove a barrier to students entering the profession.
- Description: Doctorate of Philosophy
- Authors: Stratton, David
- Date: 2003
- Type: Text , Thesis , PhD
- Full Text:
- Description: The principle motivation of this work is to define an open PV architecture that will enable a variety of visualisation schemes to interoperate and that will encourage the generation of PV systems and research into their efficacy. Ultimately this may lead to more effective pedagogy in the field of computer programming and hence remove a barrier to students entering the profession.
- Description: Doctorate of Philosophy
A psychoanalytical interpretation of the novels of Stephen Donaldson
- Authors: Simons, Kate
- Date: 2005
- Type: Text , Thesis , PhD
- Full Text: false
- Description: "This thesis proposes a Kristevan reading of the fantasy novels of Stephen Donaldson, with particular attention given to Kristeva's concepts of the symbolic order, the semiotic 'chora', abjection, the imaginery father and the thetic. It also identifies and comments on shortcomings in Kristevan theory. Donaldson's fantasies are dominated by male protagonists, one of whom is a leper while the others are rapists or murderers or else engaged in some form of violence or sexual perversion. This thesis not only offers an interpretation for this representation of disease and gross physical abuse, but also looks to the implication such corporeality brings to bear on the amatory relationships that the novels attempt to establish. "The thesis is organized into three broad sections. The first considers the ways in which the concept of the mother manifests in Donaldson's text and how the male protagonists respond to the maternal dynamic established in these books. [...] The second section of the thesis examines the role played by Donaldson's father figures. [...] The third section of [the] thesis examines the consequences of this male vulnerability with regard to its central characters who oscillate between symbolic standing and semiotic sprawl."
- Description: Doctor of Philosophy
A public want and a public duty [manuscript] : The role of the Mechanics' Institute in the cultural, social and educational development of Ballarat from 1851 to 1880
- Authors: Hazelwood, Jennifer
- Date: 2007
- Type: Text , Thesis , PhD
- Full Text:
- Description: Mechanics’ Institutes were an integral element of the nineteenth-century British adult education movement, which was itself part of an on-going radicalisation of the working class. Such was the popularity of Mechanics’ Institutes, and so reflective of contemporary British cultural philosophy, that they were copied throughout the British Empire. The Ballaarat Mechanics’ Institute, established in 1859, instilled a powerful, male-gendered British middle-class influence over the cultural, social and educational development of the Ballarat city. The focus of this study is to identify and analyse the significance of the contribution made by the Ballaarat Mechanics’ Institute to the evolving cultural development of the wider Ballarat community, with a particular emphasis on the gender and class dimensions of this influence. This is done within the context of debates about ‘radical fragments’ and ‘egalitarianism’. Utilizing a methodology based on an extensive review of archival records, contemporary newspapers held at the Ballaarat Mechanics’ Institute, and previously published research, this study was able to show that, during the period from its inception in 1859 to 1880, the Institute became a focal point for numerous cultural, social and educational activities. As one of the few institutions open to all classes, it was in a position to provide a significant influence over the developing culture of the Ballarat community. The study has also identified the use made of the Institute’s School of Design by women and the contribution of these educational classes to preparing women for employment outside their traditional roles of wives and mothers. The thesis argues that despite some early radical elements, the Ballaarat Mechanics’ Institute initially espoused liberal egalitarian values. By 1880, however, the Institute was more readily identifiable as reflecting British, male, middle-class values.
- Description: Doctor of Philosophy
- Authors: Hazelwood, Jennifer
- Date: 2007
- Type: Text , Thesis , PhD
- Full Text:
- Description: Mechanics’ Institutes were an integral element of the nineteenth-century British adult education movement, which was itself part of an on-going radicalisation of the working class. Such was the popularity of Mechanics’ Institutes, and so reflective of contemporary British cultural philosophy, that they were copied throughout the British Empire. The Ballaarat Mechanics’ Institute, established in 1859, instilled a powerful, male-gendered British middle-class influence over the cultural, social and educational development of the Ballarat city. The focus of this study is to identify and analyse the significance of the contribution made by the Ballaarat Mechanics’ Institute to the evolving cultural development of the wider Ballarat community, with a particular emphasis on the gender and class dimensions of this influence. This is done within the context of debates about ‘radical fragments’ and ‘egalitarianism’. Utilizing a methodology based on an extensive review of archival records, contemporary newspapers held at the Ballaarat Mechanics’ Institute, and previously published research, this study was able to show that, during the period from its inception in 1859 to 1880, the Institute became a focal point for numerous cultural, social and educational activities. As one of the few institutions open to all classes, it was in a position to provide a significant influence over the developing culture of the Ballarat community. The study has also identified the use made of the Institute’s School of Design by women and the contribution of these educational classes to preparing women for employment outside their traditional roles of wives and mothers. The thesis argues that despite some early radical elements, the Ballaarat Mechanics’ Institute initially espoused liberal egalitarian values. By 1880, however, the Institute was more readily identifiable as reflecting British, male, middle-class values.
- Description: Doctor of Philosophy
A quantitative risk assessment of laboratory fume cupboards at Monash University
- Authors: Tillman, C.J.
- Date: 1990
- Type: Text , Thesis , Masters
- Full Text: false
- Description: "In this work, a quantitative risk assessment procedure for laboratory fume cupboards has been developed using estimates of frequency (probabilty x exposure) and severity."
- Description: Masters Degree in Applied Science, Occupational Health and Safety
- Authors: Tillman, C.J.
- Date: 1990
- Type: Text , Thesis , Masters
- Full Text: false
- Description: "In this work, a quantitative risk assessment procedure for laboratory fume cupboards has been developed using estimates of frequency (probabilty x exposure) and severity."
- Description: Masters Degree in Applied Science, Occupational Health and Safety
A randomized controlled trial of a high intensity interval training intervention using a body sensor network and facebook
- Authors: Foy, Daryl
- Date: 2012
- Type: Text , Thesis , Masters
- Full Text:
- Description: Purpose The purpose of this pilot study was to conduct an impact evaluation on adherence to a 5 week high intensity interval training (HIIT) intervention by the use of a body sensor network and social networking site (SNS) software. The study design used was experimental, comprised of two-groups with random allocation to each and pre- and post-tests of repeated sprint performance. Setting University of Ballarat, Australia. Subjects Participants (N = 16) included university student members of a State League 5 field hockey club. The study employed a convenience sample consisting of an intervention group (n=8) and a control group (n=8). Intervention Both groups were given a 5 week HIIT program specifically designed to improve performance in repeated sprint activity (RSA). This program comprised twice weekly training sessions over the 5 weeks with gradual increases in training load and concomitant reduction in rest and recovery. The intervention group used a garment with sensors to gather heart rate and accelerometer data (speed, distance and cadence) that published the physiological data via Bluetooth and GPRS to a purpose-specific software application called SPUTNIK which ran on the Facebook social networking site (SNS). This group could socialise their data amongst themselves and share detailed graphical analysis of their training programs. They were also able to set, change and share their goals and comment on each other’s training, goals and progress. The intervention group could train together as they required. The control group used a heart rate monitor (HRM) to guide their training sessions and a paper-based
- Description: Master Human Movement: Bio-Science
- Authors: Foy, Daryl
- Date: 2012
- Type: Text , Thesis , Masters
- Full Text:
- Description: Purpose The purpose of this pilot study was to conduct an impact evaluation on adherence to a 5 week high intensity interval training (HIIT) intervention by the use of a body sensor network and social networking site (SNS) software. The study design used was experimental, comprised of two-groups with random allocation to each and pre- and post-tests of repeated sprint performance. Setting University of Ballarat, Australia. Subjects Participants (N = 16) included university student members of a State League 5 field hockey club. The study employed a convenience sample consisting of an intervention group (n=8) and a control group (n=8). Intervention Both groups were given a 5 week HIIT program specifically designed to improve performance in repeated sprint activity (RSA). This program comprised twice weekly training sessions over the 5 weeks with gradual increases in training load and concomitant reduction in rest and recovery. The intervention group used a garment with sensors to gather heart rate and accelerometer data (speed, distance and cadence) that published the physiological data via Bluetooth and GPRS to a purpose-specific software application called SPUTNIK which ran on the Facebook social networking site (SNS). This group could socialise their data amongst themselves and share detailed graphical analysis of their training programs. They were also able to set, change and share their goals and comment on each other’s training, goals and progress. The intervention group could train together as they required. The control group used a heart rate monitor (HRM) to guide their training sessions and a paper-based
- Description: Master Human Movement: Bio-Science
A region-based progressive image compression technique : RePic
- Authors: Bell, Daniel
- Date: 2000
- Type: Text , Thesis , PhD
- Full Text: false
- Description: "This thesis is concerned with the development of RePIC, a new method for the representation and compression of images in such a way that allows the image to be progressively reconstructed."
- Description: Doctor of Philosophy
- Authors: Bell, Daniel
- Date: 2000
- Type: Text , Thesis , PhD
- Full Text: false
- Description: "This thesis is concerned with the development of RePIC, a new method for the representation and compression of images in such a way that allows the image to be progressively reconstructed."
- Description: Doctor of Philosophy
A study of health changes after client-centred, team-based rehabilitation
- Authors: MacPhail, Maureen
- Date: 2003
- Type: Text , Thesis , Masters
- Full Text:
- Description: "This study explores the role of rehabilitation as a link between illness and health by describing global and subjective change after rehabilitation."
- Description: Master of Applied Science
- Authors: MacPhail, Maureen
- Date: 2003
- Type: Text , Thesis , Masters
- Full Text:
- Description: "This study explores the role of rehabilitation as a link between illness and health by describing global and subjective change after rehabilitation."
- Description: Master of Applied Science
A study of multiple perspectives and knowledge in adverse drug reaction decision-making : Volume 1
- Authors: O'Brien, Michelle
- Date: 2004
- Type: Text , Thesis , PhD
- Full Text:
- Description: Injury and illness associated with drugs are major problems in Australia and around the world, despite significant developments in the area of adverse drug reaction (ADR) decision support technology. The aims of this thesis are: to investigate the ADR decision domain; to determine factors that may assist in the prevention, detection and management of ADRs; and, to inform the pre-requirements analysis phase of the development of decision support systems. An approach has been taken that permits open and grounded study of the decision environment. This approach can then be used to frame and inform the design of an ADR decision support system. Fifteen case studies that comprise self selected consumers, the treating medical practitioner/s and expert perspectives of a single instance of an ADR (fifteen in-depth consumer interviews, eight in-depth medical practitioner interviews and 30 expert written questionnaires), have been collected and analysed using a grounded theory approach, a symbolic interactionist theoretical framework and a social constructionist epistemology. The analysis was performed from three perspectives: individual case study analysis (all interviews for an instance of an ADR); group analysis (consumer, medical practitioner and expert views) and analysis combining the individual case studies and groups of data. Concepts, themes and theory have emerged from these data in the following areas: • the contribution of the differences in understanding of the core concepts within this domain, to misunderstandings between decision-makers; • the consumer as a diagnostic decision-maker in the ADR decision domain; • differential diagnostic strategies used by the consumers and medical practitioners; • complexities in the ADR decision domain that make diagnosis difficult; • the role of ADR information in consumer and medical practitioner decision-making; • decision types used by consumers and medical practitioners in the ADR decision domain; • resources used by consumers, medical practitioners and experts to inform their ADR decisions; • decision-making with partial knowledge of the consumer case history, drug behaviour and diseases; • the impact of suspected ADRs on consumers and on future decision-making; • medical practitioner/consumer decision-making models; and, • reasons for low ADR reporting and the impact on the development of new ADR knowledge. The results above suggest the following: • The ADR decision domain is more complex than the current ADR decision support focus and that broadening this focus may assist in providing a more complete and useful decision support solution. • Improving the prevention, detection and management of ADRs requires more than providing prescribers with up to date ADR information. Other important factors are sharing of information, awareness of the role of the consumer, a collaborative approach between the consumers and medical practitioners, and generation of new ADR knowledge. • A grounded theory analysis of case study data using the theoretical perspectives of social constructionism and symbolic interactionism provided insight into this domain from the perspectives of multiple decision-makers. This may be an approach that can be used by systems analysts to inform the requirements analysis phases of decision support within other domains. The results of this qualitative work are preliminary. Future work is required to confirm and expand these results.
- Description: Doctor of Philosophy
- Authors: O'Brien, Michelle
- Date: 2004
- Type: Text , Thesis , PhD
- Full Text:
- Description: Injury and illness associated with drugs are major problems in Australia and around the world, despite significant developments in the area of adverse drug reaction (ADR) decision support technology. The aims of this thesis are: to investigate the ADR decision domain; to determine factors that may assist in the prevention, detection and management of ADRs; and, to inform the pre-requirements analysis phase of the development of decision support systems. An approach has been taken that permits open and grounded study of the decision environment. This approach can then be used to frame and inform the design of an ADR decision support system. Fifteen case studies that comprise self selected consumers, the treating medical practitioner/s and expert perspectives of a single instance of an ADR (fifteen in-depth consumer interviews, eight in-depth medical practitioner interviews and 30 expert written questionnaires), have been collected and analysed using a grounded theory approach, a symbolic interactionist theoretical framework and a social constructionist epistemology. The analysis was performed from three perspectives: individual case study analysis (all interviews for an instance of an ADR); group analysis (consumer, medical practitioner and expert views) and analysis combining the individual case studies and groups of data. Concepts, themes and theory have emerged from these data in the following areas: • the contribution of the differences in understanding of the core concepts within this domain, to misunderstandings between decision-makers; • the consumer as a diagnostic decision-maker in the ADR decision domain; • differential diagnostic strategies used by the consumers and medical practitioners; • complexities in the ADR decision domain that make diagnosis difficult; • the role of ADR information in consumer and medical practitioner decision-making; • decision types used by consumers and medical practitioners in the ADR decision domain; • resources used by consumers, medical practitioners and experts to inform their ADR decisions; • decision-making with partial knowledge of the consumer case history, drug behaviour and diseases; • the impact of suspected ADRs on consumers and on future decision-making; • medical practitioner/consumer decision-making models; and, • reasons for low ADR reporting and the impact on the development of new ADR knowledge. The results above suggest the following: • The ADR decision domain is more complex than the current ADR decision support focus and that broadening this focus may assist in providing a more complete and useful decision support solution. • Improving the prevention, detection and management of ADRs requires more than providing prescribers with up to date ADR information. Other important factors are sharing of information, awareness of the role of the consumer, a collaborative approach between the consumers and medical practitioners, and generation of new ADR knowledge. • A grounded theory analysis of case study data using the theoretical perspectives of social constructionism and symbolic interactionism provided insight into this domain from the perspectives of multiple decision-makers. This may be an approach that can be used by systems analysts to inform the requirements analysis phases of decision support within other domains. The results of this qualitative work are preliminary. Future work is required to confirm and expand these results.
- Description: Doctor of Philosophy
A study of parents' perceptions of the influence on children's behaviour of imported children's television programs in Jakarta
- Authors: Sidabutar, Tumbur
- Date: 1996
- Type: Text , Thesis , Masters
- Full Text:
- Description: Master of Arts
- Description: The principal aim of this study is to survey parents' perceptions of the influence of imported children's television programs on their children's behaviour. The survey was carried out in the Jakarta area. The study was promoted by a desire to investigate the claim made by some social commentators in Indonesia recently that children's behaviour was worsening, especially since the rapid expansion of commercial television. For the survey, a group of 388 parents of mixed socio-economic status were questioned. As a further step, qualitative research techniques were used to interview key personnel from the Indonesian television industry. Both the quantitative and qualitative data obtained was related to imported children's programs broadcast on both commercial and government channels. The result indicate that there w as no significant correlation between increased negative behaviour in children and the watching of imported children's programs. Most parents were inclined toward the view that they could not be certain whether or not their children's behaviour was influenced by imported children's television programs. Neither did they consider such programs to have a negative influence on their children's behaviour. Variation in parents' socio-economic status did not lead to a significant difference in percentages. Since parents did not perceive there to be any correlation, there may be other factors at work leading children to behave in increasingly negative ways, or perhaps the social commentators are mistaken and children's behaviour is not worsening at all
- Authors: Sidabutar, Tumbur
- Date: 1996
- Type: Text , Thesis , Masters
- Full Text:
- Description: Master of Arts
- Description: The principal aim of this study is to survey parents' perceptions of the influence of imported children's television programs on their children's behaviour. The survey was carried out in the Jakarta area. The study was promoted by a desire to investigate the claim made by some social commentators in Indonesia recently that children's behaviour was worsening, especially since the rapid expansion of commercial television. For the survey, a group of 388 parents of mixed socio-economic status were questioned. As a further step, qualitative research techniques were used to interview key personnel from the Indonesian television industry. Both the quantitative and qualitative data obtained was related to imported children's programs broadcast on both commercial and government channels. The result indicate that there w as no significant correlation between increased negative behaviour in children and the watching of imported children's programs. Most parents were inclined toward the view that they could not be certain whether or not their children's behaviour was influenced by imported children's television programs. Neither did they consider such programs to have a negative influence on their children's behaviour. Variation in parents' socio-economic status did not lead to a significant difference in percentages. Since parents did not perceive there to be any correlation, there may be other factors at work leading children to behave in increasingly negative ways, or perhaps the social commentators are mistaken and children's behaviour is not worsening at all
A study of recovery and separation of heavy metal ions from waste solutions using precipitate flotation
- Authors: Ren, Xiang (Sean)
- Date: 1999
- Type: Text , Thesis , PhD
- Full Text: false
- Description: An important industrial problem is the production of wastewater containing a large amount of heavy metal ions. The study described in this thesis is trying to use precipitate flotation technology to explore techniques for not only removing heavy metal ions from the solution, but also selectively separating them to recycle of the recoyered metal value from industry wastewater. Zinc and copper hydroxide precipitation and flotation behaviour have been studied. lt shows that it is almost impossible to separate copper and zinc ion using hydroxide precipitate flotation when the solution contains Fe3+ or Al3+ ions. The influence of additional ions such as Ca2+ and Mg2+, and other electrolytes on the flotation and separation have been studied. DLVO theory has been used to explain the mechanisms occurring in the process. A new process, named "self-carrier" precipitate flotation us~g anionic surfactants, has been developed to improve the flotation recovery and reduce the consumption of collector. The mechanism of the process is discussed in detail with reference to data collected from Optical Microscopy, Scanning Electron Microscopy and Zeta Potential Measurement. The xanthates are the most commonly used class of sulphide mineral collectors. This study investigated the copper sulphide precipitate reactions and the aggregation behaviour, the influence of oxidation, additional ions etc., and successfully used xanthate to float the sulphide precipitates. The mechanisms occurring in this process have been discussed. The investigation of the sulphide precipitate flotation behavior using a cationic collector has also been carried out to discover the possibility of copper and zinc separation. An important application of this study is the flotation and separation of copper and zinc ions from industry wastewater. The tailing wastewater from a mineral processing plant, Woodlawn Mines (N.S.W., Australia), which contains high concentrations of harmful heavy metal ions was used to test the flotation and separation of the heavy metal ions. Both xanthate and cationic collectors have been investigated for the flotation separation. Effective separation has been achieved .
- Description: Doctor of Philosophy
- Authors: Ren, Xiang (Sean)
- Date: 1999
- Type: Text , Thesis , PhD
- Full Text: false
- Description: An important industrial problem is the production of wastewater containing a large amount of heavy metal ions. The study described in this thesis is trying to use precipitate flotation technology to explore techniques for not only removing heavy metal ions from the solution, but also selectively separating them to recycle of the recoyered metal value from industry wastewater. Zinc and copper hydroxide precipitation and flotation behaviour have been studied. lt shows that it is almost impossible to separate copper and zinc ion using hydroxide precipitate flotation when the solution contains Fe3+ or Al3+ ions. The influence of additional ions such as Ca2+ and Mg2+, and other electrolytes on the flotation and separation have been studied. DLVO theory has been used to explain the mechanisms occurring in the process. A new process, named "self-carrier" precipitate flotation us~g anionic surfactants, has been developed to improve the flotation recovery and reduce the consumption of collector. The mechanism of the process is discussed in detail with reference to data collected from Optical Microscopy, Scanning Electron Microscopy and Zeta Potential Measurement. The xanthates are the most commonly used class of sulphide mineral collectors. This study investigated the copper sulphide precipitate reactions and the aggregation behaviour, the influence of oxidation, additional ions etc., and successfully used xanthate to float the sulphide precipitates. The mechanisms occurring in this process have been discussed. The investigation of the sulphide precipitate flotation behavior using a cationic collector has also been carried out to discover the possibility of copper and zinc separation. An important application of this study is the flotation and separation of copper and zinc ions from industry wastewater. The tailing wastewater from a mineral processing plant, Woodlawn Mines (N.S.W., Australia), which contains high concentrations of harmful heavy metal ions was used to test the flotation and separation of the heavy metal ions. Both xanthate and cationic collectors have been investigated for the flotation separation. Effective separation has been achieved .
- Description: Doctor of Philosophy