Digital Commons Network^™

The Moderation Of Gender And Generation In The Effects Of Perceived Destination Image On Tourist Attitude And Visit Intention: A Study Of Potential Chinese Visitors To Australia, Songshan (Sam) Huang, Robert Van Der Veen

Research outputs 2014 to 2021

The overall purpose of this study is to examine the moderating roles of gender and generation in the effects of perceived destination image on tourist attitude and visit intention among Chinese potential tourists to Australia. Australia is one of the preferred destinations to Chinese tourists, and the China market emerges to be increasingly important to destination marketing organizations in Australia. Echoing the call for more gender studies in the tourism literature and also based on the generation theory, this study employed a cross-sectional questionnaire survey design and used structural equation modelling in its analysis. Survey data were collected through convenience …

High Growth Potential Of Long-Term Starved Deep Ocean Opportunistic Heterotrophic Bacteria, Marta Sebastián, Margarita Estrany, Clara Ruiz-González, Irene Forn, Maria Montserrat Sala, Josep M. Gasol, Celia Marrasé

Research outputs 2014 to 2021

Experiments with bacteria in culture have shown that they often display “feast and famine” strategies that allow them to respond with fast growth upon pulses in resource availability, and enter a growth-arrest state when resources are limiting. Although feast responses have been observed in natural communities upon enrichment, it is unknown whether this blooming ability is maintained after long periods of starvation, particularly in systems that are energy limited like the bathypelagic ocean. Here we combined bulk and single-cell activity measurements with 16S rRNA gene amplicon sequencing to explore the response of a bathypelagic community, that had been starved for …

Fingerprinting Blue Carbon: Rationale And Tools To Determine The Source Of Organic Carbon In Marine Depositional Environments, Nathan R. Geraldi, Alejandra Ortega, Oscar Serrano, Peter I. Macreadie, Catherine E. Lovelock, Dorte Krause-Jensen, Hilary Kennedy, Paul S. Lavery, Michael L. Pace, Joeri Kaal, Carlos M. Duarte

Research outputs 2014 to 2021

Blue carbon is the organic carbon in oceanic and coastal ecosystems that is captured on centennial to millennial timescales. Maintaining and increasing blue carbon is an integral component of strategies to mitigate global warming. Marine vegetated ecosystems (especially seagrass meadows, mangrove forests, and tidal marshes) are blue carbon hotspots and their degradation and loss worldwide have reduced organic carbon stocks and increased CO₂ emissions. Carbon markets, and conservation and restoration schemes aimed at enhancing blue carbon sequestration and avoiding greenhouse gas emissions, will be aided by knowing the provenance and fate of blue carbon. We review and critique current …

Clostridium Difficile Ribotype 017–Characterization, Evolution And Epidemiology Of The Dominant Strain In Asia, Korakrit Imwattana, Daniel R. Knight, Brian Kullin, Deirdre A. Collins, Papanin Putsathit, Pattarachai Kiratisin, Thomas V. Riley

Research outputs 2014 to 2021

Clostridium difficile ribotype (RT) 017 is an important toxigenic C. difficile RT which, due to a deletion in the repetitive region of the tcdA gene, only produces functional toxin B. Strains belonging to this RT were initially dismissed as nonpathogenic and circulated largely undetected for almost two decades until they rose to prominence following a series of outbreaks in the early 2000s. Despite lacking a functional toxin A, C. difficile RT 017 strains have been shown subsequently to be capable of causing disease as severe as that caused by strains producing both toxins A and B. While C. difficile RT …

The Not-So-Sterile Womb: Evidence That The Human Fetus Is Exposed To Bacteria Prior To Birth, Lisa F. Stinson, Mary C. Boyce, Matthew S. Payne, Jeffrey A. Keelan

Research outputs 2014 to 2021

The human microbiome includes trillions of bacteria, many of which play a vital role in host physiology. Numerous studies have now detected bacterial DNA in first-pass meconium and amniotic fluid samples, suggesting that the human microbiome may commence in utero. However, these data have remained contentious due to underlying contamination issues. Here, we have used a previously described method for reducing contamination in microbiome workflows to determine if there is a fetal bacterial microbiome beyond the level of background contamination. We recruited 50 women undergoing non-emergency cesarean section deliveries with no evidence of intra-uterine infection and collected first-pass meconium …

Comparison Of Liberica And Arabica Coffee: Chlorogenic Acid, Caffeine, Total Phenolic And Dpph Radical Scavenging Activity, Aidilla Mubarak, Kevin D. Croft, Catherine P. Bondonno, Nurul Sakinah Din

Research outputs 2014 to 2021

Information on the composition of chlorogenic acid, caffeine and antioxidant activity of Coffea liberica is scarce, albeit the importance of this species in some parts of the world. This study assessed the composition of chlorogenic acid, total phenolic, caffeine and free radical scavenging activity in green and roasted C. liberica in comparison to C. arabica. The compositions of these compounds were also investigated in C. liberica at different roasting degree. We found a comparable amount of chlorogenic acid in green C. liberica and C. arabica. However, roasted C. arabica had a significantly higher chlorogenic acid content than roasted C. liberica …

A Systematic Review Of How Multiple Stressors From An Extreme Event Drove Ecosystem-Wide Loss Of Resilience In An Iconic Seagrass Community, Gary A. Kendrick, Robert J. Nowicki, Ylva S. Olsen, Simone Strydom, Matthew W. Fraser, Elizabeth A. Sinclair, John Statton, Renae K. Hovey, Jordan A. Thomson, Derek A. Burkholder, Kathryn M. Mcmahon, Kieryn Kilminster, Yasha Hetzel, James W. Fourqurean, Michael R. Heithaus, Robert J. Orth

Research outputs 2014 to 2021

A central question in contemporary ecology is how climate change will alter ecosystem structure and function across scales of space and time. Climate change has been shown to alter ecological patterns from individuals to ecosystems, often with negative implications for ecosystem functions and services. Furthermore, as climate change fuels more frequent and severe extreme climate events (ECEs) like marine heatwaves (MHWs), such acute events become increasingly important drivers of rapid ecosystem change. However, our understanding of ECE impacts is hampered by limited collection of broad scale in situ data where such events occur. In 2011, a MHW known as the …

Fractional Anisotropy Of Thalamic Nuclei Is Associated With Verticality Misperception After Extra-Thalamic Stroke, Taiza E. G. Santos, Jussara A. O. Baggio, Carlo Rondinoni, Laura Machado, Karina T. Weber, Luiz H. Stefano, Antonio C. Santos, Octavio M. Pontes-Neto, Joao P. Leite, Dylan J. Edwards

Research outputs 2014 to 2021

Verticality misperception after stroke is a frequent neurological deficit that leads to postural imbalance and a higher risk of falls. The posterior thalamic nuclei are described to be involved with verticality perception, but it is unknown if extra-thalamic lesions can have the same effect via diaschisis and degeneration of thalamic nuclei. We investigated the relationship between thalamic fractional anisotropy (FA, a proxy of structural integrity), and verticality perception, in patients after stroke with diverse encephalic extra-thalamic lesions. We included 11 first time post-stroke patients with extra-thalamic primary lesions, and compared their region-based FA to a group of 25 age-matched healthy …

Cetacean Sightings Within The Great Pacific Garbage Patch, Susan E. Gibbs, Chandra P. Salgado Kent, Boyan Slat, Damien Morales, Leila Fouda, Julia Reisser

Research outputs 2014 to 2021

Here, we report cetacean sightings made within a major oceanic accumulation zone for plastics, often referred to as the ‘Great Pacific Garbage Patch’ (GPGP). These cetacean records occurred in October 2016 and were made by sensors and trained observers aboard a Hercules C-130 aircraft surveying the GPGP at 400 m height and 140 knots speed. Four sperm whales (including a mother and calf pair), three beaked whales, two baleen whales, and at least five other cetaceans were observed. Many surface drifting plastics were also detected, including fishing nets, ropes, floats and fragmented debris. Some of these objects were close to …

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Dna Methylation Of The Clusterin Promoter: Associations With Alzheimer’S Disease Risk And Related Phenotypes, Madeline Peretti

Theses: Doctorates and Masters

Background

In 2017 approximately 50 million people worldwide were living with dementia. With Alzheimer’s disease (AD), accounting for 50-70% of dementia cases making this debilitating disease, with no current effective prevention, treatment or cure, a critical healthcare concern. Genome wide association studies (GWAS) have identified a number of risk genes for late onset AD (LOAD); Apolipoprotein E (APOE), a gene involved in the cholesterol/lipid pathway is considered the gene with the greatest risk. The third most associated AD risk gene is Clusterin (CLU), is also involved in the cholesterol/lipid pathway. CLU has been implicated in both …

Living With Autism: The Experience Of Developmentally Healthy Adolescents And Youths Who Have A Sibling Diagnosed With Autism Spectrum Disorder, Jessica Michel

Theses: Doctorates and Masters

Researchers have proposed that typically developing siblings of individuals diagnosed with autism spectrum disorder (ASD), or target siblings, are at increased risk of experiencing psychological distress particularly when compared to other clinical and community sibling groups. To date, evidence drawn from quantitative studies, utilising the target siblings’ mothers as the primary informants has been mixed. These studies have primarily focused on risk factors, while the role of protective factors in the experiences of target siblings remains unexplored in quantitative investigations. However, qualitative studies utilising target siblings as informants have emerged providing insights regarding the processes of coping and adaptation that …

Chemical Composition And Toxicity Of Emissions From Burning Five Vegetation Types Of Western Australia Under Experimental Combustion Conditions, T T Trang Dong

Theses: Doctorates and Masters

This study investigated the emission factors (EFs) for inorganic gases (CO2, CO, SO2, NO and NO2), carbonyls (formaldehyde, acetaldehyde, acetone, propionaldehyde, butyraldehyde and benzaldehyde), volatile organic compounds (VOCs) and particulate matter (PM2.5 and PM10) from laboratory-based fires of vegetation from five typical vegetation types of Western Australia. Species burnt were three grasslands (Spinifex represented by Triodia basedowii, Kimberley grass represented by Sehima nervosum and Heteropogon contortus, and an invasive grass represented by Ehrharta calycina (Veldt grass)), Banksia woodland and Jarrah forest under different combustion conditions. Chemical composition (water-soluble metals and polycyclic aromatic hydrocarbons – PAHs) and in vitro toxicity …

Parental Bonding: Validity, Stability And Predictor Of Mental And Physical Health During Pregnancy, Delicia Dorothy Pereira

Theses: Doctorates and Masters

Background: Parental bonding during childhood is known to have a significant impact on an individual’s life-long health. The influence of early parent-child relationships may be particularly strong in mothers who are pregnant with their first child. In this study, these emotional bonds were explored using the Parental Bonding Instrument (PBI), a retrospective and quantitative measure of parental bonding. The PBI has not been validated in a pregnant population, nor has its consistency been examined across the birth of a child. Therefore, this study: i) validates the factor structure of the PBI for the first time in an Australian population of …

An Investigation Of Secondary Student Perceptions Of Fairness About Assessment Processes Implemented By Their Teachers, Tania Blazevic

Theses: Doctorates and Masters

This research investigated the effects of secondary school teachers’ assessment practices on students’ perceptions of fairness in Croatia. It focused on the extent to which teachers implemented consistent assessment practices and made judgements of student achievements, and how this affected students’ perceptions.

The need for assessment influences its creation and implementation, which in turn influences the outcomes. Teachers’ assessment of students is an ongoing practice in schools in Croatia, both officially and unofficially, and questions about consistent application have persisted. This research was motivated by a confrontation with a disgruntled student and set in motion an examination of teachers’ application …

Causes And Possible Consequences Of Hybridisation In Angelfishes At Christmas Island, Federico Vitelli

Theses: Doctorates and Masters

The angelfishes (family Pomacanthidae) have the greatest proportion (~30%) of hybridising species, compared to other families of reef fishes, with 26 species implicated in hybridisation. However, very little is known about hybridisation in angelfish, especially in terms of fitness of the hybrids and possible ecological consequences. Hybrids between three species (C. flavissima, C. eibli and C. vroliki) in the genus Centropyge have previously been reported from Christmas island, where these have been observed in heterospecific harems and interbreeding. This provides the unique opportunity to examine the breakdown in assortative mating in marine fishes. The broad aim of this …

The Development Of Social–Emotional Skills In Pre-Primary Children: A Comparison Of Parent, Teacher And Combined Coaching Programs, Nichola Lucia Webb

Theses: Doctorates and Masters

The development of social–emotional skills is pivotal in generating positive outcomes for mental health and wellbeing throughout the childhood period and into later life (Hertzman, 2004; Moore, 2006; Sosna & Mastergeorge, 2005). While research has explored the effects of parent and teacher influences on young children’s social–emotional skills, most studies have either focussed on high-risk child populations, compared single influences with each other (e.g., parent versus teacher) or compared one combined group of influences with a control group. Few studies have directly compared the separate effects of parent, teacher and peer components to assess which are more successful in the …

Seedling Xylem Anatomy Of Two Banksia Species Relative To Availability Of Groundwater, Melissa Karlinski

Theses: Doctorates and Masters

Fluctuating environmental conditions place plants at risk of mortality if they cannot adapt, particularly to warmer temperatures and drier environments. Plants are known to modify their morphology, physiology and anatomy to thrive under these conditions, and xylem anatomy and hydraulic architecture are common traits studied to understand plant adaptations and responses to changeable water availability. However, little is known about the changes to the hydraulic architecture of groundwater dependent plants during their early establishment in water-limited environments. By exposing young seedlings of two Banksia species to contrasting groundwater availability treatments in a glasshouse experiment, it was possible to analyse the …

Factors Affecting The Survival And Implantation Of Human Blastocysts Following Vitrification, Hamish Barblett

Theses: Doctorates and Masters

The increased cell numbers, presence of the blastocoel and rapid cell re-organisation have required the development of specific survival criteria post warm to effectively select the most viable blastocyst for transfer. Pre-freeze blastocyst expansion and post warm re-expansion have been shown to contribute significantly to the chances of an implantation and subsequent live birth. The aim of this study was to explore factors that influence the outcome of blastocyst transfers after vitrification and warming, and hopefully improve outcomes by further applying improvements in future cycles. Variables from 8 years of vitrified/warmed blastocysts were retrospectively compiled and analysed to determine the …

The Placenta And Cardiovascular Disease: A Meta-Analysis, Ruben Phillips

Theses: Doctorates and Masters

The uterine environment in which a fetus grows and develops is now recognised as a risk factor for the development of adult diseases such as cardiovascular disease (CVD). A fetus relies on the nutrients and conditions delivered via the placenta, and as such the placenta plays a vital role in the establishment and maintenance of appropriate uterine conditions. Unfavourable uterine conditions such as an inadequate resource flow from the placenta can lead to diminished growth of the fetus and may ultimately result in both short and long-term increases in risk of CVD for the baby. This has been demonstrated in …

Social Impacts Of Climate Change And Occupational Heat Stress And Adaptation Strategies Of Mining Workers In Ghana, Victor Fannam Nunfam

Theses: Doctorates and Masters

Excessive heat exposure due to rising temperatures associated with climate change adversely affects workers’ health, safety, productivity, and psychosocial well-being in occupational settings. In the hot and tropical regions of developing countries, long hours of physically demanding work, coupled with inadequate adaptation policies to climate change, increases the occurrence of heat-related illnesses and injuries, and contributes to the loss of productive capacity, poor decision making, and other negative effects on the social well-being of workers.

Based on the theories of social impact assessment, risk assessment, adaptation and resilience planning, this study assesses the social impacts of climate change and occupational …

Learning To Grasp In Unstructured Environments With Deep Convolutional Neural Networks Using A Baxter Research Robot, Shehan Caldera

Theses: Doctorates and Masters

Recent advancements in Deep Learning have accelerated the capabilities of robotic systems in terms of visual perception, object manipulation, automated navigation, and human-robot collaboration. The capability of a robotic system to manipulate objects in unstructured environments is becoming an increasingly necessary skill. Due to the dynamic nature of these environments, traditional methods, that require expert human knowledge, fail to adapt automatically. After reviewing the relevant literature a method was proposed to utilise deep transfer learning techniques to detect object grasps from coloured depth images. A grasp describes how a robotic end-effector can be arranged to securely grasp an object and …

When Do We Cooperate With Robots?, Debora Zanatto

School of Engineering, Computing and Mathematics Theses

Robotic usage is entering the world into many diverse ways, from advanced surgical areas to assistive technologies for disabled persons. Robots are increasingly designed and developed to assist humans with everyday tasks. However, they are still perceived as tools to be manipulated and controlled by humans, rather than complete and autonomous helpers. One of the main reasons can be addressed to the development of their capabilities to appear credible and trustworthy. This dissertation explores the challenge of interactions with social robots, investigating which specific situations and environments lead to an increase in trust and cooperation between humans and robots. After …

No Human Ever Made A Cathedral Such As This: Scoping The Ecology Of The Carols By Candlelight Effect In Australia’S Open-Air Environments, Robin Ryan

Research outputs 2014 to 2021

During Australia’s dry December, traditional and popular forms of caroling shape the sight and sound of the key Christian festival of Christmas. Creative connections between belief, place, and music are characteristically manifest in focused open-air environments of beach, bushland or park. Reasoning from gospel belief that the very first “Christmas carol” emanated from a heavenly host of angels singing to an audience of shepherds in a field, caroling alfresco is an appropriate activity. How, then, do Australian caroling venues become conducive to environmental spheres of sound and influence? While the annual mass Carols by Candlelight concerts televised from Melbourne and …

Cannabis Consumption Patterns Explain The East-West Gradient In Canadian Neural Tube Defect Incidence: An Ecological Study, Albert Stuart Reece, Gary Kenneth Hulse

Research outputs 2014 to 2021

While a known link between prenatal cannabis exposure and anencephaly exists, the relationship of prenatal cannabis exposure with neural tube defects (NTDs) generally has not been defined. Published data from Canada Health and Statistics Canada were used to assess this relationship. Both cannabis use and NTDs were shown to follow an east-west and north-south gradient. Last year cannabis consumption was significantly associated (P < .0001; cannabis use–time interaction P < .0001). These results were confirmed when estimates of termination for anomaly were used. Canada Health population data allowed the calculation of an NTD odds ratio) of 1.27 (95% confidence interval = 1.19-1.37; P < 10⁻¹¹) for high-risk provinces versus the remainder with an attributable fraction in exposed populations of 16.52% (95% confidence interval = 12.22-20.62). Data show a robust positive statistical association between cannabis consumption as both …

Characterization And Relative Quantitation Of Wheat, Rye, And Barley Gluten Protein Types By Liquid Chromatography–Tandem Mass Spectrometry, Barbara Lexhaller, Michelle L. Colgrave, Katharina A. Scherf

Research outputs 2014 to 2021

The consumption of wheat, rye, and barley may cause adverse reactions to wheat such as celiac disease, non-celiac gluten/wheat sensitivity, or wheat allergy. The storage proteins (gluten) are known as major triggers, but also other functional protein groups such as α-amylase/trypsin-inhibitors or enzymes are possibly harmful for people suffering of adverse reactions to wheat. Gluten is widely used as a collective term for the complex protein mixture of wheat, rye or barley and can be subdivided into the following gluten protein types (GPTs): α-gliadins, γ-gliadins, ω5-gliadins, ω1,2-gliadins, high- and low-molecular-weight glutenin subunits of wheat, ω-secalins, high-molecular-weight secalins, γ-75k-secalins and γ-40k-secalins …

Resistance, Extinction, And Everything In Between – The Diverse Responses Of Seaweeds To Marine Heatwaves, Sandra C. Straub, Thomas Wernberg, Mads S. Thomsen, Pippa J. Moore, Michael T. Burrows, Ben P. Harvey, Dan A. Smale

Research outputs 2014 to 2021

Globally, anomalously warm temperature events have increased by 34% in frequency and 17% in duration from 1925 to 2016 with potentially major impacts on coastal ecosystems. These “marine heatwaves” (MHWs) have been linked to changes in primary productivity, community composition and biogeography of seaweeds, which often control ecosystem function and services. Here we journalarticle the literature on seaweed responses to MHWs, including 58 observations related to resistance, bleaching, changes in abundance, species invasions and local to regional extinctions. More records existed for canopy-forming kelps and bladed and filamentous turf-forming seaweeds than for canopy-forming fucoids, geniculate coralline turf and crustose coralline …

Knowledge Management Overview Of Feature Selection Problem In High-Dimensional Financial Data: Cooperative Co-Evolution And Map Reduce Perspectives, A. N. M. Bazlur Rashid, Tonmoy Choudhury

Research outputs 2014 to 2021

The term "big data" characterizes the massive amounts of data generation by the advanced technologies in different domains using 4Vs volume, velocity, variety, and veracity-to indicate the amount of data that can only be processed via computationally intensive analysis, the speed of their creation, the different types of data, and their accuracy. High-dimensional financial data, such as time-series and space-Time data, contain a large number of features (variables) while having a small number of samples, which are used to measure various real-Time business situations for financial organizations. Such datasets are normally noisy, and complex correlations may exist between their features, …

Mouse Models Of Hepatocellular Carcinoma, Rodrigo Carlessi, Julia Köhn-Gaone, John K. Olynyk, Janina E. E. Tirnitz-Parker

Research outputs 2014 to 2021

Hepatocellular carcinoma (HCC) represents a major and steadily increasing global health challenge as the most common primary liver malignancy and leading cause of death in cirrhotic patients. The only hope for curative treatment or significant increase in life expectancy is early detection. Once patients have progressed towards end-stage HCC, effective treatment options are extremely limited on the background of a very high degree of heterogeneity in clinical presentation and outcome. Experimental chronic liver injury and cancer have been used extensively to mimic the human disease. In particular, mouse studies have advanced the field due to the ability to easily manipulate …

Tyrosine Kinase Inhibitors In The Treatment Of Hepatocellular Carcinoma, Tiffany Sandra Wai Ling Khoo, Arif Rehman, John K. Olynyk

Research outputs 2014 to 2021

Hepatocellular carcinoma is the third leading cause of cancer-related mortality in the world. Locoregional therapy is used for early stage hepatocellular carcinoma. Tyrosine kinase inhibitors have been the mainstay of treatment for advanced hepatocellular carcinoma. Sorafenib was the first drug approved based on data from two pivotal phase III trials. Although sorafenib provided a survival benefit, development of adverse events limits its use in some patients. These adverse events, such as hand–foot syndrome and diarrhea, have a significant impact on the quality of life and, in some circumstances, are severe enough to prompt cessation of the drug. In recent times, …