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Articles 31 - 60 of 13201

Full-Text Articles in Social and Behavioral Sciences

Perspectives Of Australian Policy-Makers On The Potential Benefits And Risks Of Technologically Enhanced Communicable Disease Surveillance - A Modified Delphi Survey, Christopher J. Degeling, Jane Johnson, Gwendolyn L. Gilbert Jan 2019

Perspectives Of Australian Policy-Makers On The Potential Benefits And Risks Of Technologically Enhanced Communicable Disease Surveillance - A Modified Delphi Survey, Christopher J. Degeling, Jane Johnson, Gwendolyn L. Gilbert

Faculty of Social Sciences - Papers

Background: Event-based social media monitoring and pathogen whole genome sequencing (WGS) will enhance communicable disease surveillance research and systems. If linked electronically and scanned systematically, the information provided by these technologies could be mined to uncover new epidemiological patterns and associations much faster than traditional public health approaches. The benefits of earlier outbreak detection are significant, but implementation could be opposed in the absence of a social licence or if ethical and legal concerns are not addressed. Methods: A three-phase mixed-method Delphi survey with Australian policy-makers, health practitioners and lawyers (n = 44) was conducted to explore areas of consensus and ...


An Internet-Supported School Physical Activity Intervention In Low Socioeconomic Status Communities: Results From The Activity And Motivation In Physical Education (Amped) Cluster Randomised Controlled Trial, Chris Lonsdale, Aidan Lester, Katherine B. Owen, Rhiannon L. White, Louisa R. Peralta, Morwenna Kirwan, Thierno M.O Diallo, Anthony Maeder, Andrew Bennie, Freya Macmillan, Gregory S. Kolt, Nikos Ntoumanis, Jennifer M. Gore, Ester Cerin, Dylan P. Cliff, David R. Lubans Jan 2019

An Internet-Supported School Physical Activity Intervention In Low Socioeconomic Status Communities: Results From The Activity And Motivation In Physical Education (Amped) Cluster Randomised Controlled Trial, Chris Lonsdale, Aidan Lester, Katherine B. Owen, Rhiannon L. White, Louisa R. Peralta, Morwenna Kirwan, Thierno M.O Diallo, Anthony Maeder, Andrew Bennie, Freya Macmillan, Gregory S. Kolt, Nikos Ntoumanis, Jennifer M. Gore, Ester Cerin, Dylan P. Cliff, David R. Lubans

Faculty of Social Sciences - Papers

Objective Quality physical education (PE) is the cornerstone of comprehensive school physical activity (PA) promotion programmes. We tested the efficacy of a teacher professional learning intervention, delivered partially via the internet, designed to maximise opportunities for students to be active during PE lessons and enhance adolescents’ motivation towards PE and PA.

Methods A two-arm cluster randomised controlled trial with teachers and Grade 8 students from secondary schools in low socioeconomic areas of Western Sydney, Australia. The Activity and Motivation in Physical Education (AMPED) intervention for secondary school PE teachers included workshops, online learning, implementation tasks and mentoring sessions. The primary ...


Comparing Regulatory And Non-Regulatory Indices Of Early Childhood Education And Care (Ecec) Quality In The Australian Early Childhood Sector, Iram Siraj, Steven J. Howard, Denise Kingston, Cathrine Marguerite Neilsen-Hewett, Edward Melhuish, Marc De Rosnay Jan 2019

Comparing Regulatory And Non-Regulatory Indices Of Early Childhood Education And Care (Ecec) Quality In The Australian Early Childhood Sector, Iram Siraj, Steven J. Howard, Denise Kingston, Cathrine Marguerite Neilsen-Hewett, Edward Melhuish, Marc De Rosnay

Faculty of Social Sciences - Papers

This study examines associations between Australia's regulatory ratings of quality in early childhood education and care (ECEC)-the National Quality Standard (NQS)-and two research-based quality rating scales. The analytic sample consisted of 257 ECEC services across three Australian states. Results indicated (1) modest positive associations between NQS ratings and scale scores; (2) some specificity between NQS quality areas (educational programs and practice; relationships with children) and one research scale-the Sustained Shared Thinking and Emotional Wellbeing (SSTEW) scale; (3) variability in quality scales scores within each NQS designation; and (4) mitigation of these associations when the time-gap between ratings ...


High Sensitive Sensing By A Laser Diode With Dual Optical Feedback Operating At Period-One Oscillation, Yuxi Ruan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong Jan 2019

High Sensitive Sensing By A Laser Diode With Dual Optical Feedback Operating At Period-One Oscillation, Yuxi Ruan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong

Faculty of Engineering and Information Sciences - Papers: Part B

Laser dynamics have great potential for various applications, ranging from cryptography to microwave photonics and instrumentation. This letter presents a design for achieving high sensitive sensing and measurement using the dynamics of a laser diode (LD) with a dual external cavity. In the design, one cavity is used to control the dynamics, making the LD operate at the period-one (P1) oscillation state, and the other one is associated with the quantities to be measured. The Lang-Kobayashi equations are modified and solved to develop a bifurcation diagram for the design, from which we determine the P1 state and investigate the sensing ...


Metamorphic Testing Of Driverless Cars, Zhi Q. Zhou, Liqun Sun Jan 2019

Metamorphic Testing Of Driverless Cars, Zhi Q. Zhou, Liqun Sun

Faculty of Engineering and Information Sciences - Papers: Part B

On March 18, 2018, Elaine Herzberg became the first pedestrian in the world to be killed by an autonomous vehicle after being hit by a self-driving Uber SUV in Tempe, AZ, at about 10 p.m. Video released by the local police department showed the self-driving Volvo XC90 did not appear to see Herzberg, as it did not slow down or alter course, even though she was visible in front of the vehicle prior to impact. Subsequently, automotive engineering experts raised questions about Uber's LiDAR technology.12 LiDAR, or "light detection and ranging," uses pulsed laser light to enable ...


Gpr Target Detection By Joint Sparse And Low-Rank Matrix Decomposition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Canicious Abeynayake Jan 2019

Gpr Target Detection By Joint Sparse And Low-Rank Matrix Decomposition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Canicious Abeynayake

Faculty of Engineering and Information Sciences - Papers: Part B

Ground penetrating radar (GPR) uses electromagnetic waves to image, locate, and identify changes in electric and magnetic properties in the ground. The received signal comprises not only the target echoes but also strong reflections from the rough, uneven ground surface, which impair subsurface inspections and visualization of buried objects. In this paper, a background clutter mitigation and target detection method using low-rank and sparse priors is proposed for GPR data. The radar signal is decomposed into the sum of a low-rank component and a sparse component, plus noise. The low-rank component captures the ground surface reflections and background clutter, whereas ...


Quantification Of Texture-Induced Ridging In Ferritic Stainless Steels 430 And 430lr During Tensile Deformation, Xiaoguang Ma, Jingwei Zhao, Wei Du, Xin Zhang, Laizhu Jiang, Zhengyi Jiang Jan 2019

Quantification Of Texture-Induced Ridging In Ferritic Stainless Steels 430 And 430lr During Tensile Deformation, Xiaoguang Ma, Jingwei Zhao, Wei Du, Xin Zhang, Laizhu Jiang, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

A comparative study has been carried out to assess the effect of rolling and annealing processes on ridging generation of ferritic stainless steels (FSSs) 430 and 430LR after tensile deformation. The results show that FSS 430LR has better ridging resistance owing tothe refinement of microstructure and crystallographic texture optimisation. A 30% reduction of ridging height can be achieved using FSS 430LR compared to FSS 430 after tension.Optimal reduction during cold rolling benefits the microstructural refinement and surface quality improvement of FSSs 430 and 430LR. Both theoretical calculations and experimental results indicate that the (1 1 2) and the (0 ...


A Secure And Efficient Data Sharing And Searching Scheme In Wireless Sensor Networks, Binrui Zhu, Willy Susilo, Jing Qin, Fuchun Guo, Zhen Zhao, Jixin Ma Jan 2019

A Secure And Efficient Data Sharing And Searching Scheme In Wireless Sensor Networks, Binrui Zhu, Willy Susilo, Jing Qin, Fuchun Guo, Zhen Zhao, Jixin Ma

Faculty of Engineering and Information Sciences - Papers: Part B

Wireless sensor networks (WSN) generally utilize cloud computing to store and process sensing data in real time, namely, cloud-assisted WSN. However, the cloud-assisted WSN faces new security challenges, particularly outsourced data confidentiality. Data Encryption is a fundamental approach but it limits target data retrieval in massive encrypted data. Public key encryption with keyword search (PEKS) enables a data receiver to retrieve encrypted data containing some specific keyword in cloud-assisted WSN. However, the traditional PEKS schemes suffer from an inherent problem, namely, the keyword guessing attack (KGA). KGA includes off-line KGA and on-line KGA. To date, the existing literature on PEKS ...


Creep In Primary Consolidation With Rate Of Loading Approach, Gang Bi, Shua Ni, Dong Wang, Yeqiang Chen, Jianfei Wei, Wenzong Gong Jan 2019

Creep In Primary Consolidation With Rate Of Loading Approach, Gang Bi, Shua Ni, Dong Wang, Yeqiang Chen, Jianfei Wei, Wenzong Gong

Faculty of Engineering and Information Sciences - Papers: Part B

The debate on creep in primary consolidation is analysed with a power law model following an approach in which creep is considered as rate of loading. According to this approach, primary consolidation is one type of rate of loading. To verify this approach, two types of tests, standard oedometer test and oedometer test with drainage prevented, are conducted on three types of soils (two from NGES and the other from Port of Guangzhou). The result: creep exponents obtained from two kinds of tests agree well with each other. Moreover, the approach is further validated by tracking, for over 80 years ...


Consequence Modelling Of Co2 Pipeline Failure, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton Jan 2019

Consequence Modelling Of Co2 Pipeline Failure, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton

Faculty of Engineering and Information Sciences - Papers: Part B

This paper describes the experimental investigation and Computational Fluid Dynamics (CFD) simulations of the dispersion of CO2 following high-pressure dense phase CO2 pipeline failure. A full-scale burst test was carried out to simulate a CO2 pipeline failure in the real world. The atmospheric dispersion of the CO2 following the explosive release was measured. The CFD models were validated against the experimental data. The models were then used to estimate the consequence distances related to CO2 dispersion following failure of pipelines with various diameters under different wind speeds. This approach provides a predictive formula for the consequence distances of CO2 transmission ...


David Gillespie's 'Teen Brain': A Valid Argument Let Down By Selective Science And Over-The-Top Claims, Sarah P. Loughran Jan 2019

David Gillespie's 'Teen Brain': A Valid Argument Let Down By Selective Science And Over-The-Top Claims, Sarah P. Loughran

Faculty of Social Sciences - Papers

Screen time has arguably become the most concerning aspect of development for modern-day parents. A 2015 poll identified children's excessive screen time as the number one concern for parents, overtaking more traditional concerns such as obesity and not getting enough physical activity.


Factors Supporting Retention Of Aboriginal Health And Wellbeing Staff In Aboriginal Health Services: A Comprehensive Review Of The Literature, Sara Deroy, Heike Schutze Jan 2019

Factors Supporting Retention Of Aboriginal Health And Wellbeing Staff In Aboriginal Health Services: A Comprehensive Review Of The Literature, Sara Deroy, Heike Schutze

Faculty of Social Sciences - Papers

Introduction: Aboriginal Health and Wellbeing staff are crucial for successful primary health care for Aboriginal communities. However, they are often affected by high rates of stress, burnout, and staff turn-over, which can impact primary health care delivery to Aboriginal peoples. The aim of this review was to identify organisational factors that help support the retention of Aboriginal Health and Wellbeing staff in Aboriginal Health services.

Methods: A comprehensive literature review was undertaken. Eleven electronic databases were searched for papers published between 2002 and 2017 and supplemented by hand searching. Papers were included if they were in English, full text, peer-reviewed ...


An Unmitigated Disaster: Shifting From Response And Recovery To Mitigation For An Insurable Future, Eliza R. De Vet, Christine Eriksen, Kate Booth, Shaun French Jan 2019

An Unmitigated Disaster: Shifting From Response And Recovery To Mitigation For An Insurable Future, Eliza R. De Vet, Christine Eriksen, Kate Booth, Shaun French

Faculty of Social Sciences - Papers

Australian households are increasingly vulnerable to natural hazard-related disasters. To manage disaster risk, government commissioned inquiries have called for greater investment in mitigation. This article critically examines the call for a shift in funding priority towards pre-disaster mitigation measures, in the context of growing concerns around the ability of households to access and afford insurance. It examines mitigation measures in the context of three prominent Australian disasters: the Black Saturday bushfires (Victoria, 2009), the Queensland floods (2010-2011), and Cyclone Yasi (Queensland, 2011). We argue that as a mode of disaster security, mitigation operates as a complex assemblage of logics and ...


Vascular Effects On The Bold Response And The Retinotopic Mapping Of Hv4, H Boyd Taylor, Alexander M. Puckett, Zoey J. Isherwood, Mark M. Schira Jan 2019

Vascular Effects On The Bold Response And The Retinotopic Mapping Of Hv4, H Boyd Taylor, Alexander M. Puckett, Zoey J. Isherwood, Mark M. Schira

Faculty of Social Sciences - Papers

Despite general acceptance that the retinotopic organisation of human V4 (hV4) takes the form of a single, uninterrupted ventral hemifield, measured retinotopic maps of this visual area are often incomplete. Here, we test hypotheses that artefact from draining veins close to hV4 cause inverted BOLD responses that may serve to obscure a portion of the lower visual quarterfield-including the lower vertical meridian-in some hemispheres. We further test whether correcting such responses can restore the 'missing' retinotopic coverage in hV4. Subjects (N = 10) viewed bowtie, ring, drifting bar and full field flash stimuli. Functional EPIs were acquired over approximately 1.5h ...


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 Jan 2019

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

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 ...


Comparison Of Butyric Acid Leaching Behaviors Of Zinc From Three Basic Oxygen Steelmaking Filter Cakes, Jingxiu Wang, Zhe Wang, Zhongzhi Zhang, Guangqing Zhang Jan 2019

Comparison Of Butyric Acid Leaching Behaviors Of Zinc From Three Basic Oxygen Steelmaking Filter Cakes, Jingxiu Wang, Zhe Wang, Zhongzhi Zhang, Guangqing Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid concentration and the acid to solid (L/S) stoichiometric ratio were studied, with different optimal leaching conditions obtained. BOS-1 showed the lowest leachability with only less than 10% of zinc removed by 0.5 M acid concentration and 90% of the L/S stoichiometric ratio in 10 h. The best zinc selectivity was achieved with ...


Time Series Analysis Of Online Public Opinions In Colleges And Universities And Its Sustainability, Wei He, Yuan Fang, Reza Malekian, Zhixiong Li Jan 2019

Time Series Analysis Of Online Public Opinions In Colleges And Universities And Its Sustainability, Wei He, Yuan Fang, Reza Malekian, Zhixiong Li

Faculty of Engineering and Information Sciences - Papers: Part B

With the quick penetration of Internet applications, online media have become an important carrier of public opinions. The opinions and comments expressed by young college students-one of the most active netizen groups-on the Internet have turned out to be an essential part of the online public opinions in colleges and universities. However, the existing systems generally employ simple statistical methods to analyze the effect of online public opinions on the image and reputation development of colleges and universities without taking account of other factors, such as the hotness characteristics of online public opinions and semantic information. Therefore, on the basis ...


Removal Of Hg(Ii) In Aqueous Solutions Through Physical And Chemical Adsorption Principles, Mengdan Xia, Zhixin Chen, Yao Li, Chuanhua Li, Nasir M. Ahmad, Waqas A. Cheema, Shenmin Zhu Jan 2019

Removal Of Hg(Ii) In Aqueous Solutions Through Physical And Chemical Adsorption Principles, Mengdan Xia, Zhixin Chen, Yao Li, Chuanhua Li, Nasir M. Ahmad, Waqas A. Cheema, Shenmin Zhu

Faculty of Engineering and Information Sciences - Papers: Part B

Adsorption has been the focus of research on the treatment of heavy metal mercury pollution since it is among the most toxic heavy metals in existence. The US EPA has set a mandatory discharge limit of 10 μg Hg L-1 for wastewater and for drinking water a maximum accepted concentration of 1 μg Hg L-1. Physical adsorption and chemical adsorption are the two major mechanisms of adsorption methods used for mercury removal in aqueous sources. The recent decades' research progress is reviewed to elaborate varieties of adsorption materials ranging from materials with large surface area for physical adsorption ...


Comparison Of The Mineralogy Of Iron Ore Sinters Using A Range Of Techniques, Tom Honeyands, James Manuel, Leanne Matthews, Damien O'Dea, David J. Pinson, J Leedham, Guangqing Zhang, Huibin Li, Brian J. Monaghan, Xinliang Liu, Eugene Donskoi, Nathan A.S. Webster, Mark Pownceby Jan 2019

Comparison Of The Mineralogy Of Iron Ore Sinters Using A Range Of Techniques, Tom Honeyands, James Manuel, Leanne Matthews, Damien O'Dea, David J. Pinson, J Leedham, Guangqing Zhang, Huibin Li, Brian J. Monaghan, Xinliang Liu, Eugene Donskoi, Nathan A.S. Webster, Mark Pownceby

Faculty of Engineering and Information Sciences - Papers: Part B

Many different approaches have been used in the past to characterise iron ore sinter mineralogy to predict sinter quality and elucidate the impacts of iron ore characteristics and process variables on the mechanisms of sintering. This paper compares the mineralogy of three sinter samples with binary basicities (mass ratio of CaO/SiO2) between 1.7 and 2.0. The measurement techniques used were optical image analysis and point counting (PC), quantitative X‐ray diffraction (QXRD) and two different scanning electron microscopy systems, namely, Quantitative Evaluation of Materials by Scanning Electron Microscopy (QEMSCAN) and TESCAN Integrated Mineral Analyser (TIMA). Each ...


In Situ Characterisation Of Mns Precipitation In High Carbon Steel, Yasuhiro Tanaka, Farshid Pahlevani, Suk Chun Moon, Rian J. Dippenaar, Veena Sahajwalla Jan 2019

In Situ Characterisation Of Mns Precipitation In High Carbon Steel, Yasuhiro Tanaka, Farshid Pahlevani, Suk Chun Moon, Rian J. Dippenaar, Veena Sahajwalla

Faculty of Engineering and Information Sciences - Papers: Part B

Manganese sulphide (MnS) is one of the major non-metallic inclusions in steel with huge impact on steel property. In the case of high carbon steel, due to higher sulphur content and its brittleness, controlling MnS formation is one of the main issues. MnS has a complicated precipitation mechanism during solidification in liquid and solid steel and at the interface with oxide inclusions. Higher sulphur content, lower melting point and different oxide inclusions in high carbon steel will cause MnS precipitation at different stages. In this study, different stages of MnS precipitation from liquid and/or solid in high carbon steel ...


A New Method For Direct Tensile Testing Of Concrete, Faez Alhussainy, Hayder Alaa Hasan, M Neaz Sheikh, Muhammad N. S Hadi Jan 2019

A New Method For Direct Tensile Testing Of Concrete, Faez Alhussainy, Hayder Alaa Hasan, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

Different testing methods were used in previous studies to measure the direct tensile strength of concrete. However, these methods experienced several major deficiencies such as stress concentration at the end of the specimens because of inadequate gripping and loading eccentricity and nonuniform fracture plane because of difficulties in aligning and centering the specimens during testing. This study presents the details of a new method of testing concrete under uniaxial tension. The method was developed to overcome the difficulties associated with testing methods adopted in the previous research studies. A full description of the wooden molds used in casting the specimens ...


Minimal Hypersurfaces In The Ball With Free Boundary, Glen Wheeler, V.-M Wheeler Jan 2019

Minimal Hypersurfaces In The Ball With Free Boundary, Glen Wheeler, V.-M Wheeler

Faculty of Engineering and Information Sciences - Papers: Part B

In this note we use the strong maximum principle and integral estimates prove two results on minimal hypersurfaces F:Mn→Rn+1 with free boundary on the standard unit sphere. First we show that if F is graphical with respect to any Killing field, then F(Mn) is a flat disk. This result is independent of the topology or number or boundaries. Second, if Mn=Dn is a disk, we show the supremum of the curvature squared on the interior is bounded below by n times the infimum of the curvature on the boundary. These may be combined the give ...


Grain Boundary Induced Deformation Mechanisms In Nanocrystalline Al By Molecular Dynamics Simulation: From Interatomic Potential Perspective, Liang Zhang, Yasushi Shibuta, Xiaoxu Huang, Cheng Lu, Mao Liu Jan 2019

Grain Boundary Induced Deformation Mechanisms In Nanocrystalline Al By Molecular Dynamics Simulation: From Interatomic Potential Perspective, Liang Zhang, Yasushi Shibuta, Xiaoxu Huang, Cheng Lu, Mao Liu

Faculty of Engineering and Information Sciences - Papers: Part B

Nanocrystalline metals exhibit many excellent mechanical properties and their underlying deformation mechanisms have been studying widespread. The well-designed atomistic simulations can predict the mechanical behavior of materials ahead of experiments and provide sufficient information on the atomic scale. The choice of appropriate interatomic potential is one of the main concerns of any atomistic simulation that needs to be seriously considered in order to obtain reliable results. In this study, we investigated the mechanical response and the deformation mechanisms of nanocrystalline Al under uniaxial loading by molecular dynamics (MD) simulations with different embedded atom method (EAM) interatomic potentials. The selection of ...


Work Pattern Of Neurology Nurses In A Chinese Hospital: A Time And Motion Study, Ping Yu, Liying Song, Siyu Qian, X Yao, Jue Huang, Lingtong Min, Xudong Lu, Huilong Duan, Ning Deng Jan 2019

Work Pattern Of Neurology Nurses In A Chinese Hospital: A Time And Motion Study, Ping Yu, Liying Song, Siyu Qian, X Yao, Jue Huang, Lingtong Min, Xudong Lu, Huilong Duan, Ning Deng

Faculty of Engineering and Information Sciences - Papers: Part B

Aim: To investigate nursing work patterns in a neurology department in a Chinese hospital. Background: Knowledge of nursing work patterns is important for nursing management and work design, and for the evaluation of organizational process change associated with the introduction of an innovation.

Methods: A time‐and‐motion method was used to observe 14 registered nurses' (RNs') work patterns in a neurology department in a Chinese hospital. Results: There were 147 hr of observation. Overall, the most time‐consuming activities were verbal communication (28.5%) and documentation (28.3%), followed by indirect care (14.6%) and direct care (14%). Compared ...


On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma Jan 2019

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

This article addresses the pseudo-tetragonal nature of the crystal lattice of martensite in carbon-containing steels. It is proposed that the periodic distortion of c-cube edges by the presence of carbon atoms is better reflected in the root-mean-square distortions of martensite lattice than by the value of doublet splitting of the corresponding X-ray reflections of the martensite crystal.


Use Of Geogrids And Recycled Rubber In Railroad Infrastructure For Enhanced Performance, Buddhima Indraratna, Yujie Qi, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Tim Neville, Fernanda Bessa Ferreira, Amir Shahkolahi Jan 2019

Use Of Geogrids And Recycled Rubber In Railroad Infrastructure For Enhanced Performance, Buddhima Indraratna, Yujie Qi, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Tim Neville, Fernanda Bessa Ferreira, Amir Shahkolahi

Faculty of Engineering and Information Sciences - Papers: Part B

Railway tracks are conventionally built on compacted ballast and structural fill layers placed above the natural (subgrade) foundation. However, during train operations, track deteriorations occur progressively due to ballast degradation. The associated track deformation is usually accompanied by a reduction in both load bearing capacity and drainage, apart from imposing frequent track maintenance. Suitable ground improvement techniques involving plastic inclusions (e.g., geogrids) and energy absorbing materials (e.g., rubber products) to enhance the stability and longevity of tracks have become increasingly popular. This paper presents the outcomes from innovative research and development measures into the use of plastic and ...


Modelling The X-Ray Source For The Australian Mri-Linac, Natalia Roberts, Bradley M. Oborn, U Jelen, B Dong, Jarrad Begg, Armia George, Saree Alnaghy, Trent Causer, Thahabah Alharthi, Lois C. Holloway, Peter E. Metcalfe Jan 2019

Modelling The X-Ray Source For The Australian Mri-Linac, Natalia Roberts, Bradley M. Oborn, U Jelen, B Dong, Jarrad Begg, Armia George, Saree Alnaghy, Trent Causer, Thahabah Alharthi, Lois C. Holloway, Peter E. Metcalfe

Faculty of Engineering and Information Sciences - Papers: Part B

MRI-guided radiotherapy allows real-time imaging during treatment however the magnetic field influences the dose distribution in the patient. An accurate model of the radiation beam and the encompassing magnetic field is important to predict dosimetry changes. The purpose of this work is to develop a Monte Carlo model of the Australian MRI-Linac to be used as input into a dose calculation tool for treatment planning. The Australian MRI-Linac is a 1 T inline system with a 6MV flattening filter free photon beam. Commissioning measurements were undertaken both with and without the magnetic field present, PDDs and profiles were used to ...


Characterization Of Prompt Gamma Ray Emission For In Vivo Range Verification In Particle Therapy: A Simulation Study, Melek Zarifi, Susanna Guatelli, Yujin Qi, David Bolst, Dale A. Prokopovich, Anatoly B. Rosenfeld Jan 2019

Characterization Of Prompt Gamma Ray Emission For In Vivo Range Verification In Particle Therapy: A Simulation Study, Melek Zarifi, Susanna Guatelli, Yujin Qi, David Bolst, Dale A. Prokopovich, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper we investigate the emission and detection characteristics of prompt gamma (PG) rays for in vivo range verification during hadron therapy, using Geant4 simulations. Proton, 4 He and 12 C beams of varying energy are incident on water phantoms. The PG production yield, energy spectral characteristics and spatial correlation with the Bragg Peak (BP) have been quantified. Further, the angular distributions for PG detection with respect to a point-of-reference on the phantom surface have been explored. The temporal properties of PG emission and time-of-flight (TOF) of PG detection have also been investigated in correlation with the changing particle ...


Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld Jan 2019

Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.


Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang Jan 2019

Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

We study the effect of a strong and low frequency (ω < Δ, the superconducting gap) electrical field on a superconducting state. It is found that the superconducting gap decreases with the field intensity and wavelength. The physical mechanism for this dependence is the multiphoton absorption by a superconducting electron. By constructing the state of a superconducting electron dressed by photons, we determined the dependence of the superconducting gap on E / ω and temperature. We show that the critical temperature is determined by the parameter E / ω which is distinct from that induced by the heating effect. The result is consistent with experimental findings. This result can be applied to study terahertz nonlinear superconducting metamaterials.