Social and Behavioral Sciences Commons^™

On The Cauchy Problem For Stochastic Parabolic Equations In Holder Spaces, Kai Du, Jiakun Liu

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, we establish a sharp $ C^{2+\alpha }$-theory for stochastic partial differential equations of parabolic type in the whole space.

Three-Dimensional Measurement With Reflection Suppression Based On High-Dynamic Range Images, Limei Song, Yuan Ru, Yangang Yang, Qinghua Guo, Xinjun Zhu, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

To deal with the three-dimensional (3-D) point cloud loss caused by object reflection in the active fringe projection 3-D measurement, an active reflection suppression method for 3-D measurement is proposed. The method employs high-dynamic range images obtained by multiple exposure image fusion and a three-wavelength phase-shift profilometry method to achieve high-precision 3-D measurement of reflective objects. Experimental results show that, compared to traditional 3-D measurement methods, the proposed one can more effectively handle reflections thereby avoiding 3-D point cloud loss in the measurement of reflective objects.

Characterization Of Amorphous Magnetic Materials Under High-Frequency Non-Sinusoidal Excitations, Md. Ashib Rahman, Md Rabiul Islam, Kashem M. Muttaqi, Danny Sutanto

Faculty of Engineering and Information Sciences - Papers: Part B

In power electronic based energy conversion, the high-frequency transformer (HFT) is usually excited with a high-frequency (HF) square wave voltage generated from a power electronic converter circuit (PEC). A PEC needs a reasonable dead-band (DB) and the inclusion of the DB changes the shape of the square wave. In this paper, for the characterization of the core, the DB is varied to produce different non-sinusoidal excitation voltages and an optimized excitation voltage is identified. The effect of the DB on the hysteresis loop of the HFT is also demonstrated. The mathematical analysis shows that the inclusion of the DB causes …

Towards Multi-User Searchable Encryption Supporting Boolean Query And Fast Decryption, Yunling Wang, Jianfeng Wang, Shi Sun, Joseph K. Liu, Willy Susilo, Joon Sang Baek, Ilsun You, Xiaofeng Chen

Faculty of Engineering and Information Sciences - Papers: Part B

Searchable encryption enables the data owner to outsource their data to the cloud server while retaining the search ability. Recently, some researchers proposed a variant of searchable encryption, named single-writer/multi-reader searchable encryption (SMSE), in which any authorized data user can perform a search query. That is, each document identifier is encrypted using attribute-based encryption (ABE), such that an arbitrary authorized user whose attributes match the corresponding access policy can access the document. However, the cloud server cannot determine whether the user has the ability to decrypt the matched data. Thus, it has to response all the search results to the …

Experimental Investigation And Modeling Of The Transformation Of Illicit Drugs In A Pilot-Scale Sewer System, Jiaying Li, Jianfa Gao, Phong K. Thai, Adam Shypanski, Ludwika Nieradzik, Jochen F. Mueller, Zhiguo Yuan, Guangming Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

In-sewer stability of illicit drug biomarkers has been evaluated by several reactor-based studies, but less has beendone in sewer pipes. Experiments conducted in sewer pipes have advantages over lab-scale reactors in providing more realisticbiomarker stability due to theflow and biological dynamics. This study assessed the transportation and transformation of sevenillicit drug biomarker compounds in a pilot-scale rising main and a gravity sewer pipe. Biomarkers presented diverse stabilitypatterns in the pilot sewers, based on which a drug transformation model was calibrated. This model was subsequently validatedusing transformation data sets from the literature, aiming to demonstrate the predictability of the pilot-based transformationcoefficients …

Pricing European Call Options Under A Hard-To-Borrow Stock Model, Guiyuan Ma, Song-Ping Zhu, Wenting Chen

Faculty of Engineering and Information Sciences - Papers: Part B

This paper studies European call option pricing problem under a hard-to-borrow stock model where stock price and buy-in rate are fully coupled. Avellaneda and Lipkin (2009) proposed a simplified solution approach with an independence assumption, and then derived a semi-explicit pricing formula. However, such an approach has limited its application to more general cases. In this paper, we propose a partial differential equation (PDE) approach for pricing European call options, regardless of the independence assumption. A two-dimensional PDE is derived first with a set of appropriate boundary conditions. Then, two numerical schemes are provided with different treatments of the jump …

Investigation Of The Consequence Of High-Pressure Co 2 Pipeline Failure Through Experimental And Numerical Studies, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton

Faculty of Engineering and Information Sciences - Papers: Part B

Transportation of Carbon Dioxide (CO 2 ) via high-pressure pipelines from source to storage site forms an important link in the Carbon Capture and Storage (CCS)chain. To ensure the safety of the operation, it is necessary to develop a comprehensive understanding of the consequences of possible pipeline failure. CO 2 is a hazardous substance and an accidental release may lead to catastrophic damage. This paper describes an experimental investigation of the dispersion of CO 2 in the atmosphere in a full-scale burst test of a pipeline containing high-pressure dense phase CO 2 . The experiment was carried out to simulate …

Local-Global Interaction Buckling Of Square High Strength Concrete-Filled Double Steel Tubular Slender Beam-Columns, Mizen Ahmed, Qing Quan Liang, Vipulkumar I. Patel, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

High-strength square concrete-filled double steel tubular (CFDST) slender beam-columns with a circular internal steel tube subjected to eccentric loads may undergo interaction local-global buckling. No computational studies on the interaction local-global buckling of slender square CFDST beam-columns have been reported and their behavior has not been fully understood. This paper describes a mathematical model for the simulation of the interaction local-global buckling behavior of square high-strength CFDST slender beam-columns under axial compression in combination with uniaxial bending. The mathematical model is formulated by the fiber approach, accounting for confinement provided by the internal circular steel tube, and geometric and material …

High Spatial Resolution Scintillator Dosimetry Of Synchrotron Microbeams, James Archer, Enbang Li, Jeremy A. Davis, Matthew Cameron, Anatoly B. Rosenfeld, Michael L. F Lerch

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Frequency Domain Characterization And Performance Bounds Of Alms Loop For Rf Self-Interference Cancellation, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y J. Guo, J (Yiannis) Vardaxoglou

Faculty of Engineering and Information Sciences - Papers: Part B

Analog Least Mean Square (ALMS) loop is a promising method to cancel self-interference (SI) in in-band fullduplex (IBFD) systems. In this paper, the steady state analyses of the residual SI powers in both analog and digital domains are firstly derived. Eigenvalue decomposition is then utilized to investigate the frequency domain characteristics of the ALMS loop. Our frequency domain analyses prove that the ALMS loop has an effect of amplifying the frequency components of the residual SI at the edges of the signal spectrum in the analog domain. However, the matched filter in the receiver chain will reduce this effect, resulting …

The Development And Ballistic Performance Of Protective Steel-Concrete Composite Barriers Against Hypervelocity Impacts By Explosively Formed Projectiles, Alex M. Remennikov, Edward Gan, Tuan D. Ngo, Michael Netherton

Faculty of Engineering and Information Sciences - Papers: Part B

Explosively formed projectiles (EFP) are one of the most severe explosive and impact loading threats for civil infrastructure and military vehicles. Currently, there is no effective means of protection for military vehicles and infrastructure facilities from EFPs. This paper presents the experimental results of the hypervelocity impact of EFPs on steel-concrete (SC) barrier systems of finite dimensions. The SC barrier units tested were broadly representative of the type of protective SC units used in the expedient construction of barriers for mitigating improvised explosive device (IED) and EFP threats to critical infrastructure facilities. The response of non-composite, partially-composite, and fully-composite SC …

Investigation Of Engineering Properties Of Normal And High Strength Fly Ash Based Geopolymer And Alkali-Activated Slag Concrete Compared To Ordinary Portland Cement Concrete, Nabeel Farhan, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Fly ash-based geopolymer (FAGP) and alkali-activated slag (AAS) concrete are produced by mixing alkaline solutions with aluminosilicate materials. As the FAGP and AAS concrete are free of Portland cement, they have a low carbon footprint and consume low energy during the production process. This paper compares the engineering properties of normal strength and high strength FAGP and AAS concrete with OPC concrete. The engineering properties considered in this study included workability, dry density, ultrasonic pulse velocity (UPV), compressive strength, indirect tensile strength, flexural strength, direct tensile strength, and stress-strain behaviour in compression and direct tension. Microstructural observations using scanning electronic …

A Comparative Study Of A Niti Alloy Subjected To Uniaxial Monotonic And Cyclic Loading-Unloading In Tension Using Digital Image Correlation: The Grain Size Effect, Xiaohui Bian, Azdiar Adil Gazder, Ahmed A. Saleh, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

The present digital image correlation study characterised the local axial and shear strain fields of a 56Ni-44Ti wt.% shape memory alloy with an average grain size of 100 μm, under uniaxial monotonic and cyclic loading-unloading in tension. To elucidate the grain size effect, the results were compared with a previous investigation of the same alloy with an average grain size of 10 μm. The maximum local axial strain rate signified the direction and extent of the localised transformation. The widened single inclined transformation band and multiple criss-crossing patterns assist in straightening the sample edge by releasing an in-plane moment instigated …

Smart Approaches In Facilitating Engineering Students To Learn Health Technology, Winson Lee, Gursel Alici

Faculty of Engineering and Information Sciences - Papers: Part B

Partly due to the aging population around the world, job markets for developing biomedical devices and technology have been rapidly expanding. Organizations are recruiting engineers of various disciplines to design and test biomedical devices. This arouses interest of some engineering students to take academic subjects to learn some health technology, while keeping their main disciplines in specific engineering areas like mechanical engineering. Engineers need to have good understanding of the human body and different sorts of diseases, before they can apply good engineering solutions to solve the medical problems. However, teaching engineering students without prior education in medical-related aspects could …

Tele-Monitoring Technology As A Tool For Monitoring And Management Of Patients With Congestive Heart Failure, Elena Vlahu-Gjorgievska, Swetha Nagapuri, Khin Than Win

Faculty of Engineering and Information Sciences - Papers: Part B

Telehealth interventions are designed to facilitate the remote exchange of information and data between patients and health care providers, improving the quality and safety of the patients and increasing efficiency and cost-effectiveness of health care providers. The development of telecommunications and virtual technology allowed a number of telehealth systems to be applied in different health care areas. These technologies can provide an alternative monitoring and solutions for decreasing the hospital readmission rates for patients with congestive heart failure (CHF). In this paper, a systematic literature review regarding telemonitoring and its use in the management of patients with CHF is conducted. …

Experimental Study To Examine The Role Of Under Sleeper Pads For Improved Performance Of Ballast Under Cyclic Loading, Wickramarachchi Withanage Chamindi Jayasuriya, Buddhima Indraratna, Ngoc Trung Ngo

Faculty of Engineering and Information Sciences - Papers: Part B

The degradation and deformation of ballast critically affect the track geometry, safety, and passenger comfort. The increase in axle loads and train speed increases the stress applied on the ballast and exacerbates the rate of ballast degradation. This situation is more critical when tracks are built on stiff subgrades (e.g. bridges, tunnels and crossings), hence the use of energy absorbing (damping) layers in track substructure is a countermeasure to minimize track damage. In this study, a series of large-scale laboratory tests using the track process simulation testing apparatus (TPSA) is carried out to assess the performance of under sleeper pads …

Evaluation Of Data-Driven Models For Predicting The Service Life Of Concrete Sewer Pipes Subjected To Corrosion, Xuan Li, Faezehossadat Khademi, Yiqi Liu, Mahmoud Akbari, Chengduan Wang, Philip Bond, Jurg Keller, Guangming Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Concrete corrosion is one of the most significant failure mechanisms of sewer pipes, and can reduce the sewer service life significantly. To facilitate the management and maintenance of sewers, it is essential to obtain reliable prediction of the expected service life of sewers, especially if that is based on limited environmental conditions. Recently, a long-term study was performed to identify the controlling factors of concrete sewer corrosion using well-controlled laboratory-scale corrosion chambers to vary levels of H2S concentration, relative humidity, temperature and in-sewer location. Using the results of the long-term study, three different data-driven models, i.e. multiple linear regression (MLR), …

Post‐Marketing Studies Of Pharmaceutical Opioid Abuse‐Deterrent Formulations: A Framework For Research Design And Reporting, Amy Peacock, Briony K. Larance, Raimondo Bruno, Sallie-Anne Pearson, Nicholas A. Buckley, Michael P. Farrell, Louisa Degenhardt

Faculty of Social Sciences - Papers (Archive)

Background and aims Opioid formulations with properties to deter abuse (abuse‐deterrent formulations; ADFs) have been developed as one response to the prescription opioid 'epidemic'. As for all medicines, ADFs undergo evaluation of safety and efficacy prior to registration for marketing. However, reduced extra‐medical use (the primary intended outcome of ADFs and reason for their introduction) can only be established in post‐marketing observational studies, comparing them to opioid formulations without abuse‐deterrent properties. This has implications for various features of study design and analysis. We discuss proposals for the design, conduct, governance and reporting of post‐marketing studies on the effectiveness of pharmaceutical …

Energy Expenditure Associated With Posture Transitions In Preschool Children, Katherine Downing, Xanne Janssen, Dylan P. Cliff, Anthony D. Okely, John J. Reilly

Faculty of Social Sciences - Papers (Archive)

Background Despite growing scientific interest in the benefits of breaking up sedentary time with intermittent standing or walking, few studies have investigated the energy cost of posture transitions. This study aimed to determine whether posture transitions are associated with increased energy expenditure in preschool children. Methods Forty children (mean age 5.3 ± 1.0y) completed a ~150-min room calorimeter protocol involving sedentary, light, and moderate- to vigorous-intensity activities. This study utilised data from ~65-min of the protocol, during which children were undertaking sedentary behaviours (TV viewing, drawing/colouring in, and playing with toys on the floor). Posture was coded as sit/lie, stand, …

Remembering And Forgetting 1974: The 2011 Brisbane Floods And Memories Of An Earlier Disaster, Scott J. Mckinnon

Faculty of Social Sciences - Papers (Archive)

The city of Brisbane, capital of the Australian state of Queensland, sits on a floodplain and has been struck by two devastating flood disasters in the last 50 years. This article contributes to the growing literature on disaster memory by tracing memories of a flood in 1974 as they were constructed and re-enacted in a more recent disaster in 2011. The article examines how disaster memories shape local identities and considers how such memories influence policy and local knowledge, doing so by reference to an analysis of three forms of memory media-personal narratives, news media reporting, and built memorials. At …

Does Dissatisfaction With, Or Accurate Perception Of Overweight Status Help People Reduce Weight? Longitudinal Study Of Australian Adults, Xiaoqi Feng, Andrew Wilson

Faculty of Social Sciences - Papers (Archive)

Background: With studies around the world suggesting a large proportion of people do not recognise that they are overweight (or feel satisfied with being overweight), this fuels the view that such 'misperceptions' need to be 'corrected'. However, few longitudinal studies have examined the consequences of under-perceived weight status, nor over-perceived weight status (when a person feels overweight when they are not) and weight-related satisfaction on trajectories in body mass index (BMI).

Methods: Five-year BMI trajectories were examined among 8174 participants in an Australian nationally representative cohort. Each person was classified into groups according to their neighbourhood socioeconomic circumstances, baseline BMI …

Understanding Non-Vaccinating Parents' Views To Inform And Improve Clinical Encounters: A Qualitative Study In An Australian Community, Catherine Helps, Julie Leask, Lesley M. Barclay, Stacy M. Carter

Faculty of Social Sciences - Papers (Archive)

Objectives: To explain vaccination refusal in a sample of Australian parents.

Design: Qualitative design, purposive sampling in a defined population.

Setting: A geographically bounded community of approximately 30 000 people in regional Australia with high prevalence of vaccination refusal.

Participants: Semi structured interviews with 32 non-vaccinating parents: 9 fathers, 22 mothers and 1 pregnant woman. Purposive sampling of parents who had decided to discontinue or decline all vaccinations for their children.

Recruitment: via local advertising then snowballing.

Results: Thematic analysis focused on explaining decision-making pathways of parents who refuse vaccination. Common patterns in parents' accounts included: perceived deterioration in health …

Narrative Identity Reconstruction As Adaptive Growth During Mental Health Recovery: A Narrative Coaching Boardgame Approach, Douglas Kerr, Frank P. Deane, Trevor P. Crowe

Faculty of Social Sciences - Papers (Archive)

Objective: The purpose of this paper is to construct a conceptual framework for investigating the reconstruction of narrative identity in mental health recovery from a complexity perspective. This conceptual framework provides the foundation for developing a health boardgame to facilitate narrative identity reconstruction.

Methods: A selective integrative review of the theoretical and empirical literature relevant to narrative identity reconstruction in recovery was conducted. Sources included books, dissertations, internet resources, and professional journals.

Findings: The reviewed material provides a conceptual framework that offers an enriched understanding of narrative identity reconstruction in recovery as a process of adaptive growth. It identifies the …

There's No Evidence 5g Is Going To Harm Our Health, So Let's Stop Worrying About It, Sarah P. Loughran

Faculty of Social Sciences - Papers (Archive)

Hype continues to surround the roll-out of 5G technology in Australia and across the world. While there is promise of faster network speeds, and talk of exciting technologies like driverless cars, there's also a growing movement to stop the implementation of 5G due to concerns about the effects it may have on our health. But the scientific evidence we've got assures us there's no reason to worry. The radio frequencies powering 5G will be well below the exposure limits known to cause harm.

Effects Of Postural Stability, Active Control, Exposure Duration And Repeated Exposures On Hmd Induced Cybersickness, Dante Risi, Stephen Palmisano

Faculty of Social Sciences - Papers (Archive)

Cybersickness is common during head-mounted display (HMD) based virtual reality. This study examined whether it is possible to: (1) identify people who are more susceptible to this cybersickness; and (2) find general ways to reduce its occurrence and severity. Our participants were exposed to HMD-based virtual reality four times over two different days (using "Freedom Locomotion VR"). During these 10-min trials, participants were either free-standing or posturally restrained as they actively controlled or passively viewed their locomotion through the virtual environment. Cybersickness was found to increase steadily over time during each exposure. While this cybersickness was markedly reduced on day …

Development Of Australia's Front-Of-Pack Interpretative Nutrition Labelling Health Star Rating System: Lessons For Public Health Advocates, Michael Moore, Alexandra Jones, Christina Pollard, Heather Yeatman

Faculty of Social Sciences - Papers (Archive)

Objectives: To draw advocacy lessons from actions undertaken by public health groups to assist the development of Australia and New Zealand's Health Star Rating (HSR) front-of-pack nutrition labelling system.

Methods: The advocacy approaches undertaken by the Public Health Association of Australia leading up to the time of the adoption of the HSR is examined using a 10 step advocacy framework. Key roles in advocacy planning and implementation are described, along with coordinating efforts by health and consumer groups during the HSR development processes.

Results: HSR aims to support consumers to make informed choices to protect from diet-related diseases, including obesity. …

"I Feel My Body Moving And I Hear The Word": Using Gesture-Like Movement To Enhance Productive Word Recall, Bianca Mister Colmenares, Michael S. Burri

Faculty of Social Sciences - Papers (Archive)

Have you ever been in a situation where you just can't quite think of the word you want to say? You know the word. Perhaps you've used the word many times before. But for some reason, on this occasion you just can't recall and produce the precise word you want. It's in your mind, you know it's there, but it just won't come out. This is a linguistic event which has been quite widely researched and is known as the tip-of-the-tongue phenomenon. Add to the mix the fact that you are learning a second language (L2) and need to navigate …

Accounts From Developers Of Generic Health State Utility Instruments Explain Why They Produce Different Qalys: A Qualitative Study, Kristen Pickles, Emily Lancsar, Janelle Seymour, David Parkin, Cam Donaldson, Stacy M. Carter

Faculty of Social Sciences - Papers (Archive)

Purpose and setting: Despite the label "generic" health state utility instruments (HSUIs), empirical evidence shows that different HSUIs generate different estimates of Health-Related Quality of Life (HRQoL) in the same person. Once a HSUI is used to generate a QALY, the difference between HSUIs is often ignored, and decision-makers act as if 'a QALY is a QALY is a QALY'. Complementing evidence that different generic HSUIs produce different empirical values, this study addresses an important gap by exploring how HSUIs differ, and processes that produced this difference. 15 developers of six generic HSUIs used for estimating the QOL component of …

Process Trumps Potential Public Good: Better Vaccine Safety Through Linked Cross-Jurisdictional Immunisation Data In Australia, Katherine M. Duszynski, Nicole Pratt, John Lynch, Annette J. Braunack-Mayer, Lee K. Taylor, Jesia G. Berry, Vicki Xafis, Jim Buttery, M S. Gold

Faculty of Social Sciences - Papers (Archive)

Objective: To provide insights into complexities of seeking access to state and federal cross‐jurisdictional data for linkage with the Australian Childhood Immunisation Register (ACIR). We provide recommendations for improving access and receipt of linked datasets involving Australian Government‐administered data.

Methods: We describe requirements for linking eleven federal and state data sources to establish a national linked dataset for safety evaluation of vaccines. The required data linkage methodology for integrating cross‐jurisdictional data sources is also described.

Results: Extensive negotiation was required with 18 different agencies for 21 separate authorisations and 12 ethics approvals. Three variations of the 'best practice' linkage model …

Sports Participation, Health Behaviours, And Body Fat During Childhood And Early Adolescence: A Multiple Mediation, Stewart A. Vella, Lauren Gardner, Byron Kemp, Matthew Schweickle, Dylan P. Cliff

Faculty of Social Sciences - Papers (Archive)

Objectives: The aim of this study was to simultaneously explore multiple pathways through which sports participation during childhood and adolescence may be associated with adiposity over time.

Design: Data were drawn from the Kindergarten cohort of the Longitudinal Study of Australian Children. A total of 4286 children provided sports participation data at age 10 years and were followed up 24 and 48 months later.

Method: Time spent in organised sports at age 10 years and time spent in physical activity at age 12 years were measured via parental-reported time-use diary. Dietary behaviours were self-reported at age 12 years. Screen time …