Digital Commons Network^™

Fire Suppression And Burnt Sediments: Effects On The Water Chemistry Of Fire-Affected Wetlands, David Blake, Hoa Lu, Pierre Horwitz, Mary Boyce

Research outputs 2012

Preventing fire from entering wetland areas during seasonal or prolonged drought, or suppressing fire once it has entered a wetland, requires consideration of the consequences of the fire-management action on water quality. Two approaches can be taken to suppress such fires: chemical fire retardants or the flooding of sediments. We determine a lack of information relating to the effects of these approaches for water quality within fire-affected wetlands. The aim of this study was to gain a preliminary understanding of the effects of three treatments: two chemical treatments and saturation. Microcosms were established to test sediments from a wetland on …

When Is A Bystander Not A Bystander? A Typology Of The Roles Of Bystanders In Workplace Bullying, Megan Paull, Maryam Omari, Peter Standen

Research outputs 2012

The role of the bystander is one which has received only a small portion of the research attention that has been paid to workplace bullying. This paper will argue that bystanders are not just incidental but are an integral part of the context of bullying. Drawing on qualitative data from two separate studies, a typology is presented which outlines thirteen potential roles bystanders can take. This typology can be employed as an awareness-raising tool to encourage individuals to examine their own behaviour in a range of situations, and to acknowledge that their actions, either deliberate or inadvertent, can contribute to …

Moving Beyond Tyrosine Hydroxylase To Define Dopaminergic Neurons For Use In Cell Replacement Therapies For Parkinson's Disease, Robert White, Meghan Thomas

Research outputs 2012

Cell replacement therapies are an attractive mode of treatment for neurodegenerative disorders as they have the potential to alleviate or modify disease symptoms and restore function. In Parkinson's disease, the cell type requiring replacement is dopamine-producing neurons of the midbrain. The source of replacement cells is contentious, with opinion still evolving. Clinical trials have previously used fetal brain tissue; however, this will likely be superseded by the use of embryonic or induced pluripotent stem cells, due to their greater availability and homogeneity. One significant caveat in the use of any cell source for therapy is that cells must first be …

Moving From Contractor To Owner Operator: Impact On Safety Culture; A Case Study, Susanne Bahn

Research outputs 2012

Purpose: The purpose of this paper is to investigate whether a change in staffing contractual arrangements, specific training in hazard identification, mentoring of supervisors and the introduction of a robust safety system could improve an organisation's safety culture. How safety conditions change under contracted out labour compared to direct labour and the influence that contracting out has on organisational safety culture is explored.

Design/methodology/approach: The study used a case study methodology to detail how the change occurred over a six month period in 2011. As part of the analysis a model of the change process and push-pull factors is offered. …

Association Between The G-Protein Β3 Subunit C825t Polymorphism With Essential Hypertension: A Meta-Analysis In Han Chinese Population, Jaipeng Lu, Q Guo, Ling Zhang, Wei Wang

Research outputs 2012

We aimed to evaluate the contribution of the G-protein β3 subunit C825T (GNB3-C825T) polymorphism to essential hypertension (EH) in Han Chinese population by performing meta-analysis. A meta-analysis was performed in 12 case–control genetic association studies including 3,020 hypertension patients and 2,790 controls from MEDLINE (PubMed) and the China National Knowledge Infrastructure platforms. The STATA 10.0 software was used in analysis. Overall, there was no significant association between the GNB3-C825T polymorphism and EH in neither additive [TT vs. CC: OR (95 % CI) = 1.11 (0.74–1.69), P = 0.61; TC vs. CC: OR (95 % CI) = 1.08 (0.89–1.31), P = …

A New Wsn Paradigm For Environmental Monitoring And Data Collection, Eric Dines, Hasanain Al-Majeed, Asanka Fernando, Mutaz Abdalla, Jaydeepsinh Gohil

Research outputs 2012

Data collection of environmental phenomena has traditionally been a very manual process. Even the advent of electronic data logging instruments has not significantly reduced the workload for managing instruments in the field. Recently however, low-cost microcontroller systems with wireless connectivity, called wireless sensor networks (WSNs) have been developed. With the proliferation of low-cost sensing elements, WSNs should be transforming environmental monitoring, but certain shortcomings in the current WSN paradigm have conspired against widespread field deployment. These are: battery capacity limitations; specialised wireless protocols that exclude WSNs from direct integration into existing data networks; and closed rather than open and extensible …

Fuzzy Logic For Smart Utilisation Of Storage Devices In A Typical Microgrid, Thair Mahmoud, Daryoush Habibi, Octavian Bass

Research outputs 2012

Efficient utilisation of Storage Devices (SD) among multiple sources of dispatch within a typical microgrid have a substantial impact on reducing the economic and environmental generation costs in that particular microgrid. Eventually, managing the multiple sources that supply energy simultaneously is a big engineering challenge. The complexity rises due the uncertainty of demand, generation cost, availability of renewable energy sources and (charging/discharging) time and price for the installed SD. This paper introduces a utilisation method that makes the SD more efficient in supplying the electricity within a typical medium size enterprise microgrid. The method is simply targeting the dynamic charging …

Modeling Of Low Coherence Interferometry Using Broadband Multi-Gaussian Light Sources, Paul Jansz, Steven Richardson, Graham Wild, Steven Hinckley

Research outputs 2012

Using a low coherence interferometry (LCI) model, a comparison of broadband single-Gaussian and multi-Gaussian light sources has been undertaken. For single-Gaussian sources, the axial resolution improves with the source bandwidth, confirming the coherence length relation that the resolution for single Gaussian sources improves with increasing spectral bandwidth. However, narrow bandwidth light sources result in interferograms with overlapping strata peaks and the loss of individual strata information. For multiple-Gaussian sources with the same bandwidth, spectral side lobes increase, reducing A-scan reliability to show accurate layer information without eliminating the side lobes. The simulations show the conditions needed for the resolution of …

The Invisibility Of Covert Bullying Among Students: Challenges For School Intervention, Amy Barnes, Donna Cross, Leanne Lester, Lydia Hearn, Melanie Epstein, Helen Monks

Research outputs 2012

Covert bullying behaviours are at least as distressing for young people as overt forms of bullying, but often remain unnoticed or unacknowledged by adults. This invisibility is increased in schools by inattention to covert bullying in policy and practice, and limited staff understanding and skill to address covert behaviours. These factors can lead to a school culture that appears to tolerate and thus inadvertently encourages covert bullying. This study explores these dynamics in Australian primary and secondary schools, including the attitudes of over 400 staff towards covert bullying, their understanding of covert bullying behaviours, and their perceived capacity to address …

Internalising Symptoms: An Antecedent Or Precedent In Adolescent Peer Victimisation?, Leanne Lester, Donna Cross, Julian Dooley, Therese Shaw

Research outputs 2012

The transition period from primary to secondary school is a critical time in adolescent development. The high prevalence of adolescent mental health problems makes understanding the causal pathways between peer victimisation and internalising symptoms an important priority during this time. This article utilises data collected from self-completion questionnaires four times over 3 years from 3,459 students’ aged 11–14 to examine directional relationships among adolescents as they transition from primary to secondary school, and investigates gender differences in these associations. The findings suggest depression in males is both a precedent and antecedent for victimisation over the transition period, whereas for females …

Anxiety, Depression And Comorbid Anxiety And Depression: Risk Factors And Outcome Over Two Years, Osvaldo Almeida, Brian Draper, Jane Pirkis, John Snowdon, Nicola Lautenschlager, Gerard Byrne, Moira Sim, Nigel Stocks, Ngaire Kerse, Leon Flicker, Jon Pfaff

Research outputs 2012

Background: This study aimed to determine: (1) the prevalence of depression, anxiety, and depression associated with anxiety (DA); (2) the risk factor profile of depression, anxiety, and DA; (3) the course of depression, anxiety, and DA over 24 months. Methods: Two-year longitudinal study of 20,036 adults aged 60+ years. We used the Patient Health Questionnaire and the Hospital Anxiety and Depression Scale anxiety subscale to establish the presence of depression and anxiety, and standard procedures to collect demographic, lifestyle, psychosocial, and clinical data. Results: The prevalence of anxiety, depression, and DA was 4.7%, 1.4%, and 1.8%. About 57% of depression …

Early Diet Quality In A Longitudinal Study Of Australian Children: Associations With Nutrition And Body Mass Index Later In Childhood And Adolescence, Claire Meyerkort, Wendy H. Oddy, Therese O'Sullivan, J Henderson, Craig Pennell

Research outputs 2012

Obesity has origins extending to antenatal and early postnatal periods; however, the relationship between early postnatal diet and subsequent obesity is not well defined. The aims of this study were to determine whether early childhood dietary quality was associated with (a) infant and adolescent nutrition and (b) body mass index (BMI) in childhood and adolescence. The degree to which early nutrition and growth factors determine BMI throughout childhood and adolescence was also explored. This research was conducted using the Raine Study, a longitudinal survey of Australian children assessed from mid-gestation to 17 years of age. A dietary quality index, the …

Moderators Of Workplace Aggression: The Influences Of Social Support And Training, Valerie Brown, Min Ing Loh, Nigel Marsh

Research outputs 2012

Reception and administrative employees may be particularly vulnerable to patient aggression in mental health services. This study examined whether satisfaction with social support and primary aggression training moderated the effects of perceived aggression on psychological distress and somatic symptoms in a sample of 101 employees. The biophysical model of threat and challenge, the stressor-stress-strain model, and the stress-buffering hypothesis served as theoretical frameworks. Results showed perceived aggression correlated positively with psychological distress, but not with somatic symptoms. Significant interactions were found for social support (buffering effect) and training (interaction effect) for somatic symptoms, but not for psychological distress. It is …

Anxiety, Depression, And Comorbid Anxiety And Depression: Risk Factors And Outcome Over Two Years, O P Almeida, B Draper, J Pirkis, J Snowdon, N T Lautenschlager, G Byrne, Moira Sim, N Stocks, N Kerse, L Flicker, J J Pfaff

Research outputs 2012

Background: This study aimed to determine: (1) the prevalence of depression, anxiety, and depression associated with anxiety (DA); (2) the risk factor profile of depression, anxiety, and DA; (3) the course of depression, anxiety, and DA over 24 months. Methods: Two-year longitudinal study of 20,036 adults aged 60+ years. We used the Patient Health Questionnaire and the Hospital Anxiety and Depression Scale anxiety subscale to establish the presence of depression and anxiety, and standard procedures to collect demographic, lifestyle, psychosocial, and clinical data. Results: The prevalence of anxiety, depression, and DA was 4.7%, 1.4%, and 1.8%. About 57% of depression …

Age And Premorbid Intelligence Suppress Complaint-Performance Congruency In Raw Score Measures Of Memory, Matthew Merema, Craig Speelman, Elizabeth Kaczmarek, Jonathan Foster

Research outputs 2012

Background: We aimed to examine the role of age and premorbid intelligence (IQ) in suppressing the relationship between subjective memory complaints (SMCs) and raw score memory performance. Methods: We used a community sample of older adults aged 66"90 years (N = 121) to test whether the inclusion of age and a premorbid IQ measure in multiple regression analyses increased semipartial correlations of raw score memory performance in predicting SMCs. Rank contrast correlations were also carried out to observe how age and premorbid IQ are related to complaint"performance congruency. Measures utilized in the study included the Memory Functioning Questionnaire (for SMCs), …

Lifestyle And Late Life Cognitive Health: Sufficient Evidence To Act Now?, Bruce Barber, D Ames, Kathryn Ellis, Ralph Martins, C Masters, C Szoeke

Research outputs 2012

No abstract provided.

Predictors Of Rapid Cognitive Decline In Alzheimer's Disease: Results From The Australian Imaging, Biomarkers And Lifestyle (Aibl) Study Of Ageing, A Sona, P Zhang, D Ames, A I Bush, N T Lautenschlager, Ralph Martins, C L Masters, C C Rowe, C Szoeke, Kevin Taddei, Kathryn A Ellis

Research outputs 2012

Background: The AIBL study, which commenced in November 2006, is a two-center prospective study of a cohort of 1112 volunteers aged 60+. The cohort includes 211 patients meeting NINCDS-ADRDA criteria for Alzheimer's disease (AD) (180 probable and 31 possible). We aimed to identify factors associated with rapid cognitive decline over 18 months in this cohort of AD patients.

Methods: We defined rapid cognitive decline as a drop of 6 points or more on the Mini-Mental State Examination (MMSE) between baseline and 18-month follow-up. Analyses were also conducted with a threshold of 4, 5, 7 and 8 points, as well as …

Wounded Kelps: Patterns And Susceptibility To Breakage, Thibaut De Bettignies, Mads Thomsen, Thomas Wernberg

Research outputs 2012

Kelps are highly productive seaweeds predominantly found in wave-exposed environments. Physical and biological processes such as sand abrasion, whiplash and grazing can wound kelp tissue, potentially weakening its ability to withstand wave forces. Despite the ecological importance of kelp tissue loss, few studies have quantified wounding patterns in kelps or how wounding might affect the biomechanical properties of kelps. We quantified the prevalence of wounds on 360 Ecklonia radiata kelps collected across 3 different reef lines (levels of wave exposure) in April (autumn), June (early winter), August (winter) and October (early spring) (i.e. before, during and after peak wave activity). …

Read To Me I Love It! Evaluation Of The Better Beginnings Program For Remote Aboriginal Communities, Lennie Barblett

Research outputs 2012

Better Beginnings for remote Aboriginal communities started in 2010 with the aim of bringing literacy resources to families with children up to five years of age in remote communities. It was developed as part of the Better Beginnings program which is a universal program for children and their families that aims to develop literacy skills through fostering a love of books and language. A finding in the larger evaluation of this project (Barrat-Pugh, Rohl & Statkus, 2010) found that there was a need for targeted strategies and resources to better support Aboriginal families and hence Better Beginnings for remote Aboriginal …

Edith Cowan University 1991-2001: The Journey So Far, Ruth Callaghan

Research outputs 2012

In celebrating the 20th anniversary of Edith Cowan University (ECU), we have reflected on: our history; our rapid growth in student numbers; course offerings; infrastructure; and the many achievements of our talented people and, of course, the University as a whole. In looking to the future, we recognise the strength and determination of the people who make up our University community will drive our continued success - our students, staff, alumni, partners, and members of committees, Boards and Council.

A Data Mining Perspective Of The Dual Effect Of Rainfall And Temperature On Wheat Yield, Yunous Vagh, Jitian Xiao

Research outputs 2012

This paper presents the final investigation within the series of qualitative and quantitative investigations carried out for the processing and analysis of geographic land-use data in an agricultural context. The geographic data was made up of crop and cereal production land use profiles. These were linked to previously recorded climatic data from fixed weather stations in Australia that was interpolated using ordinary krigeing to fit a grid surface. In this study, the profiles for the stochastic average monthly temperature and rainfall for a selected study area were used to determine their simultaneous effects on crop production at the shire level. …

Hard Or Soft? The Relationship Between Power And Organisational Incident Rates, Susanne Bahn, Llandis Barratt-Pugh

Research outputs 2012

This paper examines the power that managers have to impact on workplace safety and how in mixed method studies our preconceptions about the hardness and softness of the relevant data may be misplaced. The civil construction industry (CCI) in WA provides the case for this discussion. Workers in this industry are constantly battling between safety compliance and production pressures in an era of economic boom. The examination of 3,882 incident reports, upon which this paper’s conclusions are drawn, revealed that these ‘‘hard’’ data may often obscure incidents that occur as organisations may be pressured into providing reportable incident figures that …

Construction Induction Training: Does Mandatory Training Work?, Susanne Bahn

Research outputs 2012

Reducing the high level of deaths and injuries in the construction industry is a continual challenge. It is a specific challenge in Western Australia (WA), where the industry is adapting to the additional pressures of a resources-led development boom. In 2006, Worksafe WA responded by introducing mandatory certification in basic safety training for all employees, before they could set foot on a work site. This paper reviews the impact of this training initiative on the commercial sector of the construction industry, the training organisations, and the construction employees. The mixed methodology study collects both the perceptions of the stakeholders and …

The Impact Of Management Styles Upon Organisational Change And Safety Cultures, Susanne Bahn, Llandis Barratt-Pugh

Research outputs 2012

In this paper we discuss the findings of two large studies conducted during 2005/06 that illuminated the role of managers as change agents. We draw the findings together to conceptualise and model the leadership styles and behaviours that appear to be successful in reshaping organisational safety culture. The first study identified the instrumental influence that managers have on the safety culture within organisations. The second study revealed the influential role of managers as change agents during a cultural change initiative when they applied a flexible approach using formal and informal agencies of change. The paper situates these two studies in …

Workplace Hazard Identification: What Do Workers In Mining Know?, Susanne Bahn

Research outputs 2012

This paper presents the findings of a study conducted in 2011/2012 that investigated the skills of new entrants to the mining industry’s skills in identifying workplace hazards from photographs of their work areas and strategies to improve these practices identified by health and safety managers. The findings of phase one of the study indicated that there was a greater ability to identify the hazards by those with 6–10 years experience and aged 34–45 years. Phase two of the study, which is the topic of this paper, identified training, communication and documentation as important to improve hazard identification skills. Other strategies …

A Theory Of The Mind As A Complex System, Craig Speelman, Kim Kirsner, Stephan Halloy

Research outputs 2012

Five principles of skill acquisition are presented based on a review of research on human learning and expertise. Essentially these principles state that practice leads to faster and more efficient uses of knowledge. This enables faster performance and results in less demand on mental resources. In turn these outcomes enable higher level behaviours to be attempted. Ultimately skills are developed through refinement of many component processes. A theory of the mind is proposed that borrows from theories of complex adaptive systems. In this theory, the mind is conceived of as consisting of agents that compete for resources associated with processing …

Mentoring The Next Researcher Generation: Reflections On Three Years Of Building Vet Research Capacity And Infrastructure, Llandis Barratt-Pugh

Research outputs 2012

During 2008-2011, the National Centre for Vocational Education Research (NCVER) funded a programme to build Australian VET research capacity and rejuvenate what has been seen as the existing 'greying' researcher pool. This paper is a reflective narrative about experiences of constructing the programme with a specific focus on the mentoring activity. It is about researching how we develop VET researchers, and specifically the role that experienced researchers can play. In the first three years, more than 40 experienced VET researchers have been associated with the programme, mainly as mentors and facilitators. These mentors have supported 30 new VET researchers undertaking …

Evaluation Of The Dampier Peninsula Indigenous Parenting Support Program: Progress Report 1, Andrew Guilfoyle

Research outputs 2012

This is the first progress report of the local evaluation of the Dampier Peninsula Indigenous Parent Support Program (IPS). The evaluative report extends the Participatory Action Research (PAR) based evaluation plan (Guilfoyle, Baker, & Bray, 2011). It includes a theoretical discussion on resilience building, community development, and the role of parenting support for early child development, through links to literature and direct evidence captured through community based observations, notes, and recorded interviews with IPS workers, community members, and key stakeholders on the communities and in Broome, and case studies. The evaluation assessed IPS activities in light of its policy framework …

Lsk Derived Lsk– Cells Have A High Apoptotic Rate Related To Survival Regulation Of Hematopoietic And Leukemic Stem Cells, Cong Peng, Yaoyu Chen, Yi Shan, Haojian Zhang, Zhiru Guo, Dongguang Li, Shaoguang Li

Research outputs 2012

A balanced pool of hematopoietic stem cells (HSCs) in bone marrow is tightly regulated, and this regulation is disturbed in hematopoietic malignancies such as chronic myeloid leukemia (CML). The underlying mechanisms are largely unknown. Here we show that the Lin⁻Sca-1⁺c-Kit^- (LSK⁻) cell population derived from HSC-containing Lin⁻Sca-1⁺c-Kit⁺ (LSK) cells has significantly higher numbers of apoptotic cells. Depletion of LSK cells by radiation or the cytotoxic chemical 5-fluorouracil results in an expansion of the LSK⁻ population. In contrast, the LSK⁻ population is reduced in CML mice, and …

What A Difference A Year Made! : An Evaluation Of The National Year Of Reading 2012 In Western Australia, Queensland And The Australian Capital Territory, Caroline Barratt-Pugh, Pru Smith, Karen Anderson

Research outputs 2012

This report is an evaluation of how the National Year of Reading helped to build a reading culture across the nation. The evaluation was undertaken by The Centre for Research in Early Childhood Education, Edith Cowan University, Western Australia . The report describes the nature and outcomes of the National Year of Reading in the four case studies, including a consideration of what participating organisations delivered beyond what would normally be expected of them. The findings lead to a series of conclusions about the program's successes, challenges and legacy followed by recommendations about how these successes can be sustained and …