Digital Commons Network^™

Reply To Comment On Origin Of Surface Canting Within Fe3o4 Nanoparticles, Kathryn L. Krycka, Julie A. Borchers, R.A. Booth, Yumi Ijiri, K. Hasz, James J. Rhyne, Sara A. Majetich

Faculty & Staff Scholarship

No abstract provided.

Teacher Involvement In Implementing State Personal Finance Mandates, Deanna Franklin

All-Inclusive List of Electronic Theses and Dissertations

This study examined strategies teachers are implementing for personal finance instruction in answer to the state financial-literacy mandates in Central Texas. One-on-one interviews, focus groups, and document analysis found that teachers are relying on personal experience, community resources, and Internet resources to instruct in personal finance in absence of personal finance curricula. No data emerged that school districts were providing resources; however, administrators are willing to provide resources if they were available. Teachers are using a variety of creative methods to enhance personal financial literacy in the classroom. Sporadic in-service/professional-development opportunities were available to train teachers in personal financial-literacy instruction; …

Investigation Of Interferences And Development Of Pre-Treatment Methods For Arsenic Analysis By Anodic Stripping Voltammetry, Paul Lewtas

Theses: Doctorates and Masters

Contamination of drinking water is a serious health issue in many developing countries and there is a recognised need for low cost portable systems that are capable of analysing drinking water down to low ppb levels. Anodic Stripping Voltammetry (ASV) instruments meet these requirements but suffer interferences from other species which may also be present in the sample, particularly organics, other metals and sulfides. The last of these has received surprisingly little attention in the literature, despite being a proven interferent.

This study investigates the impact of each of these interference types, as well as a number of traditional and …

What We Know, What We Do And What We Could Do: Creating An Understanding Of The Delivery Of Health Education In Lower Secondary Government Schools In Western Australia, Donna Michelle Barwood

Theses: Doctorates and Masters

Australian health data indicates that childhood is a significant time for young Australians to develop health and well-being issues. Concurrently, health advocates herald in-school delivery of skills-based participatory health education as making significant contributions to developing behaviour change and supporting health enhancing dispositions in children and young people. In Western Australia (WA), skillsbased participatory health education is characterised by linking knowledge and understandings of what it means to be safer, healthier and more physically active to skills that action these states. Skills-based is a preferred approach to teaching and learning in the Health and Physical Education Learning Area (HPE LA), …

Accurate Modelling And Positioning Of A Magnetically-Controlled Catheter Tip, Vi T. H. Le

Theses: Doctorates and Masters

This thesis represents the initial phase of a proposed operator and patient friendly method designed to semi-automate the positioning and directing of an intravascular catheter in the human heart using a variable electromagnetically induced field to control a catheter tip equipped with three tiny fixed magnets oriented in XYZ planes. Here we demonstrate a comprehensive mathematical model which accurately calculates the magnetic field generated by the electromagnet system, and the magnetic torques and forces exerted on a three-magnet tip catheter. From this we have developed an iterative predictive computer algorithm to show the displacement and deflection of the catheter tip. …

Rising To The Challenge: Exploring The Transition From Primary To Secondary Education In A Western Australian School, Elizabeth Joan Wenden

Theses: Doctorates and Masters

The ‘Rising to the Challenge: Exploring the transition from Primary to Secondary education in a Western Australian School’ study explored the positive predictors of primary to secondary school transition of a cohort of Year 7 students (n=182) at a school in Western Australia. The transition from primary to secondary school is an important process in the lives of adolescents aged around 11-13 years old. It is a challenging and exciting time that coincides with social, emotional, physical and cognitive changes of the adolescent stage of development. Enabling a positive transition to secondary school can give adolescents the support they need …

An Examination Of Social Desirability Confounds In A New Ipsative Measure Of Murray's Psychogenic Needs, Lisa Harris

Theses: Doctorates and Masters

A reliable and valid instrument for the direct measurement of the relative strength of psychological needs is currently lacking. In response to this shortcoming, a new ipsative instrument, the Psychogenic Need Scale (PNS), is currently being developed; this is a 190-item forced-choice self-report measure that is based upon Murray’s psychogenic needs. For the development of a valid forced-choice instrument, it is critical to minimise the confounding effects of social desirability (the tendency for respondents to describe oneself in the most favourable light). Whilst other measures typically use specifically designed scales to detect social desirability confounds, this approach is unsuitable for …

Improving Energy Efficiency And Quality Of Service In An Integrated Wireless-Optical Broadband Access Network, Maha Shihab Ahmed

Theses: Doctorates and Masters

Exponential growth in the volume of wireless data, boosted by the growing popularity of mobile devices such as smart phones and tablets, is forcing telecommunication industries to rethink network design, and focus on developing high capacity mobile broadband networks. Accordingly, researchers have undertaken developmental work for an integrated wireless-optical broadband access network (WOBAN). Passive optical networks (PONs) and fourth generation (4G) wireless networks are two major candidate technologies for the WOBAN. PON is a wired access technology, well-known for its high capacity, whereas 4G is a wireless broadband access technology, popular for its ease of deployment and ability to offer …

Evaluation Of A Modified Food Frequency Questionnaire To Measure Lignans In Australian Men And Women, Ying Qi Winnie Li

Theses: Doctorates and Masters

Phytoestrogens are plant compounds that possess estrogenic and biological properties that have been postulated to protect against chronic diseases. Isoflavonoids and lignans are two main classes of phytoestrogen that have been investigated for their estrogenic efficacy and occurrence in the human diet. Isoflavonoids are found in soy and related products, whereas lignans are found in a wider range of plant-based foods, such as cereals, vegetables, fruits, legumes, nuts and seeds; and in beverages such as tea, coffee and wine. In Western populations with low dietary intake of soy products, compared to the Asian counterparts, lignans could be a more important …

I See A Spark And Blow On It: Drama Practice In Year 1 And The New Australian Curriculum In The Arts, Christine Lovering

Theses: Doctorates and Masters

New educational directives have an effect on the practice of teachers in schools. This study is propelled by the introduction of a national Australian Curriculum and subsequent changes to the Arts curriculum. As one of the five arts subjects, drama has been included in the primary school curriculum in Western Australia since 1997, however, its inclusion and the teaching of drama has not been consistently realised.

Teacher perspectives and beliefs about specific Learning Areas influence their planning and practice; often this is related to past experiences. This study aims to determine Year 1 teachers’ perspectives of, and practices in, drama. …

Estimation Of Bias With The Single-Zone Assumption In Measurement Of Residential Air Exchange Using The Perfluorocarbon Tracer Gas Method, K Van Ryswyk, L. Wallace, D. Fugler, M. Macneill, M. E. Heroux, M. D. Gibson, J. R. Guernsey, W. Kindzierski, A. J. Wheeler

Research outputs 2014 to 2021

Residential air exchange rates (AERs) are vital in understanding the temporal and spatial drivers of indoor air quality (IAQ). Several methods to quantify AERs have been used in IAQ research, often with the assumption that the home is a single, well‐mixed air zone. Since 2005, Health Canada has conducted IAQ studies across Canada in which AERs were measured using the perfluorocarbon tracer (PFT) gas method. Emitters and detectors of a single PFT gas were placed on the main floor to estimate a single‐zone AER (AER1z). In three of these studies, a second set of emitters and detectors were deployed in …

Towards An Interactive Environment For The Performance Of Dubstep Music, James Herrington

Theses: Doctorates and Masters

This Masters by Research project explores the integration of different concepts relating to the presence of the human body in Dubstep music performance. Three intended performance systems propose that the body is the logical site for the interactive control of live Dubstep music. The physicality and gestures of instrumentalists, choreographed dancers, and audience members will be examined in order to develop new and exciting ways to perform this genre in a live setting.

The systems take on a three-tiered hierarchical approach on two levels in regards to the extraction of gestural information from human body movements, as well as in …

Boundaries Of Governance: Social Responsibility In Mining In Western Australia, Gemma L. Broderick

Theses: Doctorates and Masters

This research investigated the boundaries of governance of social responsibility in three multinational mining organisations based in Perth, Western Australia. The mining industry has economic, environmental and social impacts, both positive and negative. While most of the attention of the media and supporters in government seems to focus on the positive impacts, a growing concern regarding the social implications of mining is clearly evident in public discourse and the academic literature. In response to public concern, the mining industry has adopted terms such as ‘sustainability’, ‘sustainable development’, ‘social licence to operate’ and ‘social responsibility’. Such phrases are widely used in …

Compositions, Logratios And Geostatistics: An Application To Iron Ore, Clint Ward

Theses: Doctorates and Masters

Common implementations of geostatistical methods, kriging and simulation, ignore the fact that geochemical data are usually reported in weight percent, sum to a constant, and are thus compositional in nature. The constant sum implies that rescaling has occurred and this can be shown to produce spurious correlations. Compositional geostatistics is an approach developed to ensure that the constant sum constraint is respected in estimation while removing dependencies on the spurious correlations. This study tests the applicability of this method against the commonly implemented ordinary cokriging method. The sample data are production blast cuttings analyses drawn from a producing iron ore …

Characterisation And Applications Of Iron Ore Tailings In Building And Construction Projects, Francis Atta Kuranchie

Theses: Doctorates and Masters

The mine tailings are generated as the wastes worldwide as a result of exploration, excavation, blasting, beneficiation and extraction of mineral ores. In Western Australia, due to the extensive mining activities and increasing low grade ores, there is generation of mine tailings in large quantities, which could lead to environmental and disposal problems. The common practice of handling the tailings are to store them in tailing dams or as stockpiles near mine sites. Limited quantities are sometimes used as backfills and other applications. The utilisation of tailings in building and construction projects, which may consume a large volume of wastes, …

Education For Sustainability: An Ethnographic Study Of 15 Year-2/3 Rural Western Australian Children’S Attitudes On Sustainability, Cara Payne

Theses: Doctorates and Masters

The study occurred in rural Western Australia in 2011, during UNESCO‟s Decade of Education for Sustainability Development, when sustainability became one of three cross-curriculum priorities of the Australian Curriculum. The study involved the development and implementation of a sustainability focused science program embedded in a class of 15 Year-2/3primary participants. The study emphasised a qualitative approach, but also included embedded quantitative data analysis. The aim of the science program focussed on the enhancement of the children‟s attitudes towards sustainability, to equip them with the skills needed to change their behaviours in relation to practicing the principles of sustainability. The …

An Appraisal Of Experiences Of Climate Change And Adaptive Response To Heat Stress By Farmers In Rural Ghana, Kwasi Frimpong

Theses: Doctorates and Masters

With the increase in average global temperatures, heat-related illnesses and deaths have unfolded as occupational and health issues. Periods of high to extreme temperatures are becoming more common and are a leading cause of weather-related deaths in many countries. In agricultural settings of African countries, heat stress is a major concern as many smallholder farmers work outdoors with limited access to cooling systems even in their resting and living environments. This study, conducted in the Bawku East part of Northern-East Ghana in 2013, examines, in the context of climate change, the trends and impacts of heat stress on smallholder farmers, …

Vine Copula Modelling Of Dependence And Portfolio Optimization With Application To Mining And Energy Stock Return Series From The Australian Market, Jose Arreola Hernandez

Theses: Doctorates and Masters

This thesis models the dependence risk profile, investment risk and portfolio allocation features of seven 20-stock portfolios from the mining, energy, retail and manufacturing sectors of the Australian market in the context of the 2008-2009 global financial crisis (2008-2009 GFC) and pre-GFC, GFC, post-GFC and full sample period scenarios revolving around it. The mining and energy portfolios are the base of the study, while the retail and manufacturing are considered for benchmarking purposes. Pair vine copula models including canonical vines (c-vines), drawable vines (d-vines) and regular vines (r-vines) are fitted for the analysis of …

Intensity Based Interrogation Of Optical Fibre Sensors For Industrial Automation And Intrusion Detection Systems, Gary Andrew Allwood

Theses: Doctorates and Masters

In this study, the use of optical fibre sensors for intrusion detection and industrial automation systems has been demonstrated, with a particular focus on low cost, intensity-based, interrogation techniques. The use of optical fibre sensors for intrusion detection systems to secure residential, commercial, and industrial premises against potential security breaches has been extensively reviewed in this thesis. Fibre Bragg grating (FBG) sensing is one form of optical fibre sensing that has been underutilised in applications such as in-ground, in-fence, and window and door monitoring, and addressing that opportunity has been a major goal of this thesis. Both security and industrial …

Electrical Resistivity Of Sandy Soil With Water, Leachates And Seawater, Lopa Mudra Pandey

Theses: Doctorates and Masters

Liners are used in the engineered containment systems such as landfills for controlling the migration of contaminants. Although there are several techniques for detecting the leakages through the liners, use of the electrical resistivity method can assist in timely detection of contaminant migration in cost-effective manner. This method is based on the well-established fact that the electrical resistivity of soils and other geomaterials is much higher than the electrical resistivity of water, leachates or any liquid effluents which may permeate the landfill foundation material. Additionally, the geotechnical properties of a soil exhibit a close relationship with its electrical resistivity values …

Wedge Failure Analysis Of Anchored Rock Slopes Subjected To Surcharge And Seismic Loads, Yan Kou

Theses: Doctorates and Masters

Slope stability in mining and civil engineering projects is always a problem of great concern. Because the rock mass behavior is significantly governed by the presence of joints or other discontinuities, several types of slope failure, such as plane failure, wedge failure, toppling failure, buckling failure and circular failure, are often observed. The present work focuses on the study of the wedge failure, which occurs as sliding of a mass of rock on two intersecting planes, generally discontinuity planes.

Recently, the factor of safety of rock slopes against the wedge failure has been studied in a number of investigations under …

Educative Curricula And Improving The Science Pck Of Teachers In Middle School Settings In Rural And Remote Australia, Arthur Townsend

Theses: Doctorates and Masters

Science is one of seven-mandated Key Learning Areas (KLAs) Foundation to Year 10 of the new Australian National Curriculum (ACARA, 2012). Not only, therefore, is science to be offered in every school as part of the curriculum, there is also the expectation that science is to be taught well to all students regardless of location, gender, cultural background or socio-economic status (ACARA, 2012). Studying science provides benefits to individuals by developing their scientific literacy skills (Goodrum, Hackling & Rennie, 2001; Hackling & Prain, 2008). Its study also benefits the national economy by equipping students with the innovative, inventive, and creative …

Characterising The Effect Of A Novel Optical Delay Line And Light Sources On The Resolvability Of Time Domain Optical Coherence Tomography, Paul V. Jansz

Theses: Doctorates and Masters

Optical coherence tomography (OCT) is a reflection based imaging technique, with numerous applications, initially in medical diagnostics. Unlike ultrasound, another reflection imaging technique, OCT relies on light scattering in samples, low coherence near- infrared interferometry, and graphical image construction, to acquire 2D and 3D reflectogram images. OCT has resolution an order of magnitude greater than ultrasound, but its depth penetration is less than a few millimetres.

Axial resolution is a critical parameter in determining whether OCT can be used to resolve specific features in a sample image. Typically, measures of resolution have been attributed only to the light source’s characteristics, …

Intelligent Network Intrusion Detection Using An Evolutionary Computation Approach, Samaneh Rastegari

Theses: Doctorates and Masters

With the enormous growth of users' reliance on the Internet, the need for secure and reliable computer networks also increases. Availability of effective automatic tools for carrying out different types of network attacks raises the need for effective intrusion detection systems.

Generally, a comprehensive defence mechanism consists of three phases, namely, preparation, detection and reaction. In the preparation phase, network administrators aim to find and fix security vulnerabilities (e.g., insecure protocol and vulnerable computer systems or firewalls), that can be exploited to launch attacks. Although the preparation phase increases the level of security in a network, this will never completely …

Answering Research Questions Without Calculating The Mean, Guillermo J. Campitelli

Research outputs 2014 to 2021

In an important theoretical article Speelman and McGann (2013) indicated that psychological researchers tend to use statistical procedures that involve calculating the mean of a variable in an uncritical manner. A typical procedure in psychological research consists of calculating the mean of some dependent variable in two or more samples and to present those means as summaries of the samples. The next step is to use some statistical technique (e.g., t -test, ANOVA) in order to be able to determine the probability of finding the observed differences between means in those samples given that the difference between the means of …

Reduced Cardiovascular Capacity And Resting Metabolic Rate In Men With Prostate Cancer Undergoing Androgen Deprivation: A Comprehensive Cross-Sectional Investigation, Bradley Wall, Daniel A. Galvao, Naeem Fatehee, Dennis Taaffe, Nigel Spry, David Joseph, Robert Newton

Research outputs 2014 to 2021

Objectives. To investigate if androgen deprivation therapy exposure is associated with additional risk factors for cardiovascular disease and metabolic treatment-related toxicities. Methods. One hundred and seven men (42-89 years) with prostate cancer undergoing androgen deprivation therapy completed a maximal graded objective exercise test to determine maximal oxygen uptake, assessments for resting metabolic rate, body composition, blood pressure and arterial stiffness, and blood biomarker analysis. A cross-sectional analysis was undertaken to investigate the potential impact of therapy exposure with participants stratified into two groups according to duration of androgen deprivation therapy (≥3 months). Results. Maximal oxygen uptake (26.1 ± 6.0 mL/kg/min …

Overview Of Aboriginal And Torres Strait Islander Health Status 2015, Australian Indigenous Healthinfonet

Research outputs 2014 to 2021

The main purpose of the Overview is to provide a comprehensive summary of the most recent indicators of the health and current health status of Australia’s Aboriginal and Torres Strait Islanders people. It has been prepared by Australian Indigenous HealthInfoNet staff as part of our contribution to supporting those who work in the Aboriginal and Torres Strait Islander health sector. The Overview is a key element of the HealthInfoNet commitment to authentic and engaged knowledge development and exchange. The initial sections of this Overview provide information about the context of Aboriginal and Torres Strait Islander health, population, and various measures …

Current Land Bird Distribution And Trends In Population Abundance Between 1982 And 2012 On Rota, Mariana Islands, Richard J. Camp, Kevin W. Brink, P. Marcos Gorreson, Fred A. Amidon, Paul Radley, S. Paul Berkowitz, Paul C. Banko

Research outputs 2014 to 2021

The western Pacific island of Rota is the fourth largest human-inhabited island in the Mariana archipelago and designated an Endemic Bird Area. Between 1982 and 2012, 12 point-transect distance-sampling surveys were conducted to assess bird population status. Surveys did not consistently sample the entire island; thus, we used a ratio estimator to estimate bird abundances in strata not sampled during every survey. Trends in population size were reliably estimated for 11 of 13 bird species, and 7 species declined over the 30-y time series, including the island collared-dove Streptopelia bitorquata, white-throated ground-dove Gallicolumba xanthonura, Mariana fruit-dove Ptilinopus roseicapilla, collared kingfisher …

A Neuronal Classification System For Plant Leaves Using Genetic Image Segmentation, Oluleye Babatunde, Leisa Armstrong, Dean Diepeveen, Jinsong Leng

Research outputs 2014 to 2021

This paper demonstrates the use of radial basis networks (RBF), cellular neural networks (CNN) and genetic algorithm (GA) for automatic classication of plant leaves. A genetic neuronal system herein attempted to solve some of the inherent challenges facing current software being employed for plant leaf classication. The image segmentation module in this work was genetically optimized to bring salient features in the images of plants leaves used in this work. The combination of GA-based CNN with RBF in this work proved more ecient than the existing systems that use conventional edge operators such as Canny, LoG, Prewitt, and Sobel operators. …

Learning To Teach: What Pre-Service Teachers Report, Dawn Naylor

Theses: Doctorates and Masters

With universities and schools of education receiving recurring criticism for being ineffective in preparing graduates for school teaching, this study sought to understand the phenomenon of learning to teach in order to investigate universal questions about who was learning to teach and what, where, when and how did they learn to teach during their initial learning to teach experiences at university. The topic was approached by listening to the voices and stories of those who ought to know the most about the phenomenon: the pre-service teachers. A multiple case study analysis was conducted with seven pre-service teachers, enrolled in their …