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Analysis of thermodynamic behaviour of valuable elements and slag structure during e-waste processing through copper smelting

Waste of electronics and electrical equipment and other end-of-life high technology products can be viewed as resources for metals, as they do not only contain the common metals but also trace valuable and rare elements. Every elements have different thermodynamic properties that govern the partitioning behaviour during the process. The present study investigated the thermodynamic behaviour of germanium, palladium and tantalum metals and determine their distribution-ratio in slag-metal equilibrium reaction during black copper processing. Moreover, it also examined the ferrous-calcium-silicate slag structure using vibrational spectroscopy and correlation between the degree of polymerization and distribution-ratio was developed using multiple regression analysis.

Author: Shuva, Mohahmad
Publication year: 2017
Status: Live|Last updated:18 October 2018 1:32 PM
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Development of novel antimicrobial peptides

Antimicrobial peptides (AMPs) are evolutionarily conserved main effector molecules of the innate immune system of many organisms. Due to their wide-range of activities and low potential to develop resistance against them, AMPs offer ideal templates to design novel peptide-based antimicrobial agents that can effectively control drug-resistance pathogens. In this study, novel AMPs were designed based on the unique Trp-rich domain (TRD) of a wheat endosperm protein, puroindoline A (PINA) with improved activity and biocompatibility properties. The potency, efficacy and specificity of the designed peptides to microbial cells, including persistent pathogens such as bacterial biofilms and endospores, as well as their lack of haemolytic and toxicity activities toward mammalian cells indicates these peptides, which originate from a most common edible source (wheat), could be highly valuable in pharmaceutical, food and/or agriculture industries. Another dimension of this study was to investigate the mechanism of actio…

Author: Shagaghi, Nadin
Publication year: 2017
Publication type: Thesis (PhD)
Status: Live|Last updated:18 October 2018 1:32 PM
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Managing unskilled migrant workers in the sme sector: a study of managers in Australia

This thesis examines the perspectives of managers of unskilled migrant workers in Small to Medium Enterprises (manufacturing firms). Interviews were conducted with managers and regulators. The managers reported frustrations emerging in their dealings with some migrant workers, with several situations developing into multi-faceted problems for ongoing periods. Several managers were found to be inept in their management skills and attitudinal differences emerged between senior- and middle-level management. Continued problems were experienced by managers of migrant workers yet to adapt to local work expectations. The thesis enhances understanding of some of the problems faced by managers and highlights the importance of training for both managers and migrant workers.

Author: Taylor, Letchumy
Publication year: 2018
Publication type: Thesis (PhD)
Status: Live|Last updated:9 October 2018 4:32 PM
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Exploring ways of enhancing creativity in engineering education to promote innovation: Action research in engineering design

This research is based on educational research practice and seeks to address the ways of enhancing creativity in engineering education. The study aims to help students nurture their creative thinking skills during design process in their studies. In addition, it also aims to support instructors in their teaching approach to enhance students’ creative thinking abilities. This study is an important step, with a holistic approach, in suggesting creativity and creative thinking be inherent and integral parts of every engineering curriculum. It makes a major contribution to research on creativity in engineering education.

Author: Tekmen Araci, Yasemin
Publication year: 2018
Publication type: Thesis (PhD)
Status: Live|Last updated:5 October 2018 4:32 PM
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How do risk factors for sexual and non-sexually violent offenders manifest and change in custody?

The research investigated how dynamic risk factors manifest in custody and change over time. These are important issues because they contribute to decision-making throughout sexual and non-sexually violent offenders' incarceration. Study 1 surveyed psychologists to identify behaviours that sexual offenders engage in during their incarceration, subsequently informing the development of a behavioural checklist. Study 2 validated the Satisfactory Behaviour Rating Guide, which evaluates non-sexually violent offenders' behaviour prior to gaining parole. Study 3 included four methods of measuring sexual offenders’ change during a treatment program. These studies provided an in-depth understanding, and revealed the complexities, of behavioural monitoring and change measurement in custody.

Author: Sweller, Tamara
Publication year: 2018
Publication type: Thesis (PhD)
Status: Live|Last updated:5 October 2018 4:32 PM
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Violent offenders' within-treatment change in dynamic risk and protective factors: associations with violent recidivism

This thesis investigates whether within-treatment changes on intermediary treatment targets are associated with violent reoffending at post-treatment follow-up. Taken together, the results do not provide evidence that changes in dynamic risk and protective factors translate into reductions in violence propensity. Furthermore, it remains unclear how protective factors operate in relation to reductions in risk. Developing a greater understanding of change processes and how violent offender treatment works is critical, not only in terms of delivering more effective interventions, but in terms of managing violence risk and promoting public safety.

Author: Klepfisz, Gabrielle
Publication year: 2018
Publication type: Thesis (DPsych)
Status: Live|Last updated:25 September 2018 3:32 PM
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Expressing 'Self' in a virtual world: Digital engagement for people with moderate to severe dementia

Mandy Salomon's thesis, entitled Expressing Self in a virtual world: Digital engagement for people with moderate to severe dementia, explores the lives of people with dementia to learn how interactive digital technologies might assist them. A group of aged care residents helped to design and evaluate a virtual world that was meaningful to them. When using the prototype, they experienced high levels of engagement. An outcome of the research is a design methodology that opens up new ways to improve the wellbeing of this significant user group.

Author: Salomon, Amanda
Publication year: 2016
Publication type: Thesis (PhD)
Status: Live|Last updated:24 September 2018 5:22 PM
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Coral cores as record of past sea surface temperature of the Talang Besar Island (South China Sea)

The climate of the South China Sea is highly affected by the monsoon seasons. Trace elements ratios incorporated in skeletons of long-lived corals are considered as useful climate proxies. This study is based on measuring the Sr/Ca ratio (by ICP-OES) in a massive Porites species core sampled off Talang Besar Island for long term sea surface temperature reconstruction. The coral core recorded higher sea surface temperatures than the satellite data and captures only few past ENSO events. This study can help to understand past climates and environmental changes, and therefore help in improving future climate predictions.

Author: Thyartan, Revadi Devi
Publication year: 2018
Publication type: Thesis (Masters)
Status: Live|Last updated:24 September 2018 1:32 PM
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Perpetual asphalt pavements - design enhancement

This research explores a new asphalt mix design methodology to facilitate implementation of the perpetual asphalt pavement design concept in Australia. By achieving perpetual status, pavements will only require periodic resurfacing without experiencing any major structural deterioration. This translates to significant cost savings in construction and rehabilitation of flexible pavements by providing a longer service life for the road assets and minimising user delays.

Author: Yousefdoost, Saeed
Publication year: 2017
Publication type: Thesis (PhD)
Status: Live|Last updated:24 September 2018 9:05 AM
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Isolation and characterisation of coral mucus bacilli with quorum quenching potential as a biocontrol agent for shrimp gut protection against Early Mortality Syndrome (EMS)

A shrimp disease, known commonly as Early Mortality Syndrome (EMS), has been a major problem for shrimp aquaculture in Southeast Asia due to its epizootic prevalence within the region since it was first reported in 2009. In this study, Bacilli strains isolated from coral mucus were tested for antagonistic effects against quorum sensing and the causative pathogen. Phenotypic characterisation was carried out, including bacilli biofilms characterisation, temperature-growth responses and biosurfactant production. Three phenotypically distinct strains showing notable potential were chosen to undergo coevolution as a method for strain improvement via long term exposure to the pathogen.

Author: Tan, Angelica Fiona
Publication year: 2017
Publication type: Thesis (Masters)
Status: Live|Last updated:20 September 2018 4:32 PM
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