Social and Behavioral Sciences Commons^™

Down But Not Out: Tara And George And The Boundaries Of Subjectivity., Hamish Sewell

RadioDoc Review

Set on the streets of London, amidst the snarl of traffic and the clip of passers by, this work is a biographical sound portrait of two homeless people, Tara and George. It is a testament to the parlous state of homelessness in the UK today and is masterful in its execution.

To this work, producer and host Audrey Gillan brings a quality of frank disclosure and decency. Relationships between producers and their subjects are contentious, due to an inherent power differential. Gillan neither portrays Tara and George as archetypes nor as helpless and needy. She knows she is the one …

Ideals Of Steinberg Algebras Of Strongly Effective Groupoids, With Applications To Leavitt Path Algebras, Lisa Orloff Clark, Cain Edie-Mitchell, Astrid An Huef, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

We consider the ideal structure of Steinberg algebras over a commutative ring with identity. We focus on Hausdorff groupoids that are strongly effective in the sense that their reductions to closed subspaces of their unit spaces are all effective. For such a groupoid, we completely describe the ideal lattice of the associated Steinberg algebra over any commutative ring with identity. Our results are new even for the special case of Leavitt path algebras; so we describe explicitly what they say in this context, and give two concrete examples.

Improved Performance Of Ballasted Tracks Under Impact Loading By Recycled Rubber Mats, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

Ballasted tracks at transition locations such as approaches to bridges and road crossings experience increasing degradation and deformation due to dynamic and high impact forces, a key factor that decreases the stability and longevity of railroads. One solution to minimise ballast degradation at the transition zones is using rubber energy absorbing drainage sheets (READS) manufactured from recycled tyres. When placed beneath the ballast layer, READS distributes the load over wider area and attenuate of the load over a longer duration thus decreasing maximum stress, apart from reducing the energy transferred to the ballast and other substructure components. Subsequently, the track …

Assessment Of Radio-Induced Damage In Endothelial Cells Irradiated With 40 Kvp, 220 Kvp, And 4 Mv X-Rays By Means Of Micro And Nanodosimetric Calculations, Nicolas Tang, Marta Bueno, Sylvain Meylan, Yann Perrot, Hoang Tran, Amelie Freneau, Morgane Dos Santos, Aurelie Vaurijoux, Gaetan Gruel, Mario Bernal, Marie Bordage, Dimitris Emfietzoglou, Ziad Francis, Susanna Guatelli, Vladimir Ivanchenko, Mathieu Karamitros, Ioanna Kyriakou, Wook Shin, Sebastien Incerti, Carmen Villagrasa

Faculty of Engineering and Information Sciences - Papers: Part B

2019 by the authors. Licensee MDPI, Basel, Switzerland. The objective of this work was to study the differences in terms of early biological effects that might exist between different X-rays energies by using a mechanistic approach. To this end, radiobiological experiments exposing cell monolayers to three X-ray energies were performed in order to assess the yields of early DNA damage, in particular of double-strand breaks (DSBs). The simulation of these irradiations was set in order to understand the differences in the obtained experimental results. Hence, simulated results in terms of microdosimetric spectra and early DSB induction were analyzed and compared …

Effects Of Grain Boundary On Wear Of Graphene At The Nanoscale: A Molecular Dynamics Study, Jie Zhang, Xinchun Chen, Qiang Xu, Tianbao Ma, Yuanzhong Hu, Hui Wang, Anh Kiet Tieu, Jianbin Luo

Faculty of Engineering and Information Sciences - Papers: Part B

Graphene has shown excellent tribological behaviors, enabling its potential applications as lubricating and anti-wear coatings, however, the grain boundaries (GBs) formed during the preparation process may deteriorate the performance of graphene. Using large-scale molecular dynamics simulations, we study the wear mechanism of graphene GBs with various misorientation angles between two grains. Compared with pure nanoindentation at the GBs, the critical load of wear failure upon nanoscratching across the GBs is much lower due to the synergetic actions of interlocking and pushing between the tip and graphene atoms. The misorientation angle between the adjacent grains significantly effects the onset and fashion …

An In-Situ Synchrotron Study Of The B2→B19′ Phase Transformation In A Ni-Ti Alloy Subjected To Uniaxial Monotonic Tension, Xiaohui Bian, Ahmed A. Saleh, Peter Lynch, Christopher H. J Davies, Elena V. Pereloma, Azdiar Adil Gazder

Faculty of Engineering and Information Sciences - Papers: Part B

A cold-drawn and annealed 56Ni-44Ti wt% alloy was subjected to in-situ uniaxial monotonic tension in a synchrotron. Spatially resolved diffraction data was acquired along the gauge length by pausing the loading at five select macroscopic strains within the stress plateau region. This enables tracking localised transformation phenomena by sub-dividing the gauge length into transformation band, untransformed and apparently transformed regions. Within the macroscopic stress plateau region: (i) the highly strained B2 phase within the propagating transformation band and apparently transformed regions produces a relaxation of the B2 phase within the untransformed region. (ii) The newly formed B19′ grain families exhibit …

A Novel Empirical Heat Transfer Model For A Solar Thermal Storage Process Using Phase Change Materials, Yu Bie, Ming Li, Fei Chen, Grzegorz Krolczyk, Lin Yang, Zhixiong Li, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Numerical and experimental analyses are often used to evaluate the solar thermal system with latent heat thermal energy storage (LHTES). However, the relationship between the numerical simulation and actual heat transfer process is still unclear. This work compares the simulated average temperature of two different phase change materials (PCMs) with experimental result at different operation conditions for the purpose of developing a temperature correction model. A novel empirical heat transfer model is then established to improve the simulation accuracy of PCM-based solar thermal systems. The contributions of this work include that (1) the system performance could be evaluated by the …

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 rubber elements …

Microbial Electrolysis Followed By Chemical Precipitation For Effective Nutrients Recovery From Digested Sludge Centrate In Wwtps, Sajib Barua, Basem Zakaria, Tae Chung, Faisal I. Hai, Tesfaalem Haile, Abdullah Al-Mamun, Bipro R. Dhar

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Implementation Of An Iot Based Radar Sensor Network For Wastewater Management, Adam Drenoyanis, Raad Raad, Ivan Wady, Carmel Krogh

Faculty of Engineering and Information Sciences - Papers: Part B

Critical wastewater events such as sewer main blockages or overflows are often not detected until after the fact. These events can be costly, from both an environmental impact and monetary standpoint. A standalone, portable radar device allowing non-invasive benchmarking of sewer pumping station (SPS) pumps is presented. Further, by configuring and deploying a complete Low Power Wide Area Network (LPWAN), Shoalhaven Water (SW) now has the opportunity to create "Internet of Things" (IoT)-capable devices that offer freedom from the reliance on mobile network providers, whilst avoiding congestion on the existing Supervisory Control and Data Acquisition (SCADA) telemetry backbone. This network …

Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Functional liquid metal nanoparticles (NPs), produced from eutectic alloys of gallium, promise new horizons in the fields of sensors, microfluidics, flexible electronics, catalysis, and biomedicine. Here, the development of a vapor cavity generating ultrasonic platform for nebulizing liquid metal within aqueous media for the one-step production of stable and functional liquid metal NPs is shown. The size distribution of the NPs is fully characterized and it is demonstrated that various macro and small molecules can also be grafted onto these liquid metal NPs during the liquid-based nebulization process. The cytotoxicity of the NPs grafted with different molecules is further explored. …

Examining The Impact Of Pedagogical Agents On Students Learning Experience In Virtual Worlds, Foteini Grivokostopoulou, Michael Paraskevas, Isidoros Perikos, Sasha Nikolic, Konstantinos Kovas, Ioannis Hatzilygeroudis

Faculty of Engineering and Information Sciences - Papers: Part B

Virtual worlds constitute an important part of the educational landscape that possesses unique learning capabilities and opens up new horizons in education. A vital part of 3D virtual worlds concerns the intelligent pedagogical agents that are integrated in the environments and aim to improve the interaction with the users and enhance their learning experience. The main purpose of this study is to assess the impact that the pedagogical agents have on students' engagement and learning experiences during training activities in virtual worlds. Specifically, we examine how students perceive the role of pedagogical agents as learning companions during specific exercises and …

A Data Dependency And Access Threshold Based Replication Strategy For Multi-Cloud Workflow Applications, Fei Xie, Jun Yan, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

Data replication is one of the significant sub-areas of data management in cloud based workflows. Data-intensive workflow applications can gain great benefits from cloud environments and usually need data management strategies to manage large amounts of data. At the same time, multi-cloud environments become more and more popular. We propose a cost-effective and threshold-based data replication strategy with the consideration of both data dependency and data access times for data-intensive workflows in the multi-cloud environment. Finally, the simulation results show that our approach can greatly reduce total cost of data-intensive workflow applications by considering both of data dependency and data …

Performance Evaluation Of Intermittently Cfrp Wrapped Square And Circularised Square Reinforced Concrete Columns Under Different Loading Conditions, Anh Duc Mai, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents the results of an experimental investigation on square and circularised square rein-forced concrete (RC) columns intermittently wrapped with carbon fibre reinforced polymer (CFRP)under different loading conditions. Twelve RC specimens consisting of eight square RC specimenswith 150mm150mm cross-section and 800mm height and four circularised square RC specimenswith 212mm diameter and 800 mm height were tested under concentric axial load, eccentric axialload and four-point flexural load. The test results showed that intermittent wrapping increased thestrength and ductility of square RC specimens. The test results also showed that circularisation com-bined with intermittent wrapping significantly improved the strength and ductility of …

An Alternative Form To Calibrate The Correlated Stein-Stein Option Pricing Model, Xinjiang He, Song-Ping Zhu

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, we present an alternative form of the correlated Stein-Stein option pricing model, which preserves the analytic tractability of the original form and also demonstrates certain advantage for model implementation in practice. We shall show, through an empirical study, that this alternative form generally outperforms the original Stein-Stein form for the selected set of data, demonstrating that it can serve as a good competitor to the original Stein-Stein form in real markets.

Thread Effects On The Stiffness Of Bolted Shear Connections, Aziz Ahmed, Lip H. Teh

Faculty of Engineering and Information Sciences - Papers: Part B

This paper investigates the effects of bolt threads on the initial and final stiffnesses of double-shear bolted connections through laboratory tests and finite element (FE) analyses. Nineteen specimens composed of 4.7 mm and 8.0 mm thick structural steel plates with bolt diameters of 20 mm and 30 mm having varying end distances are studied. The investigation, which involves shank and thread bolted connections, has found that the threads reduce the initial stiffness but increase the final stiffness. The FE analysis shows that the reduction in the initial stiffness is due to the bolt threads cutting into the connected plate, increasing …

Simulation Of Cosmic Radiation Spectra For Personal Microdosimetry At The International Space Station's Altitude, Stefania Peracchi, Susanna Guatelli, Linh T. Tran, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

Latest researches predict the cosmic rays exposure during long space missions outside the Earth's geomagnetic sphere, as to the Moon and Mars, can double the cancer risk. The minimization of risk associated with radiation exposure in the Low Earth Orbit (LEO) is of great interest for astronauts of the International Space Station (ISS). This risk is due to radiation hazard and can be predicted by measurement of the dose equivalent produced by the radiation environment inside of the spacecraft. Since more than 15 years ago, the Centre For Medical Radiation Physics (CMRP), University of Wollongong, is developing silicon based microdosimeters …

Metamorphic Relations For Data Validation: A Case Study Of Translated Text Messages, Boyang Yan, Brian Yecies, Zhi Q. Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

In conventional metamorphic testing, metamorphic relations (MRs) are identified as necessary properties of a computer program's intended functionality, whereby violations of MRs reveal faults in the program - under the assumption that the source and follow-up inputs (test cases used in metamorphic testing) are valid. In the present study, the authors argue that MRs can also be used to validate and assess the quality of the program's input data - under the assumption that the source or follow-up inputs can be inappropriately generated. Using this new perspective, a case study in the natural language processing domain is used to explore …

Contradictions In Information Technology Mediated Work In Long-Term Care: An Activity Theoretic Ethnographic Study, Siyu Qian, Ping Yu, Anol Bhattacherjee

Faculty of Engineering and Information Sciences - Papers: Part B

Background: The growing demand for aged care services coupled with a global shortage of skilled nursing staff has hindered long-term care facilities' ability to provide necessary services to their residents. Healthcare information technology is expected to mitigate this challenge by streamlining nursing work, while also improving quality of care and productivity.

Objectives: This study set out to examine how nurses and care workers work, the role of information technology (IT) in their work and what contradictions they face in their IT mediated work.

Design: Ethnographic study informed by six components of activity theory: subject, object, tool, rule, …

Fibre Optic Dosimetry In Synchrotron Microbeam Radiation Therapy, James Archer, Enbang Li, Anatoly B. Rosenfeld, Michael L. F Lerch

Faculty of Engineering and Information Sciences - Papers: Part B

Synchrotron microbeam radiation therapy is a novel pre-clinical therapy method that uses high brilliance, spatially fractionated, low energy x-rays to deliver a very high dose rate. A conventional spatial fractionation for these beams is 50 μm microbeam width at 400 μm peak-to-peak separation. To perform dosimetry on these beams, a dosimeter with a high spatial resolution is required. We present a plastic scintillator fibre optic dosimeter that has been demonstrated to be able to resolve the microbeam structure. The advantages of such a dosimeter is the water equivalence, passive components exposed to the radiation field, relatively inexpensive components and simple …

Evaluation Of Organ Doses Following High Dose Rate (Hdr) Brachytherapy Of Breast Cancer: A Geant4 Monte Carlo Simulation Study, M Aidil, Nurul Hashikin, Chai-Hong Yeong, Susanna Guatelli, K H. Ng, Alessandra Malaroda, Anatoly B. Rosenfeld, Alan C. Perkins

Faculty of Engineering and Information Sciences - Papers: Part B

This study aimed to evaluate the absorbed doses received by the organs at risk (OARs) following Iridium-192 (192Ir) high dose rate (HDR) brachytherapy of the left breast. The MIRD5 adult female anthropomorphic phantom, readily available in the Geant4 Monte Carlo package was used. However, the left breast was modified from 195 to 145 cm3, to represent a breast following lumpectomy. Left breast was chosen due to its higher cancer occurrence than the right breast. The HDR sources were constructed with an outer cylindrical dimension of 4.5 mm (length) x 0.9 mm (diameter). Various influencing parameters were studied, i.e. catheter arrangement …

Behaviour Of Foam Concrete Under Impact Loading Based On Shpb Experiments, Yongliang He, Mingshi Gao, Hongchao Zhao, Yichao Zhao

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an innovative method for using foam concrete as a typical building material for soft structures in underground coal mines subjected to dynamic loading. To understand the behaviour of foam concrete under impact loading, a total of 30 specimens with a diameter of 50 mm and a height of 50 mm were experimentally tested using a 75 mm diameter split Hopkinson pressure bar (SHPB) device. The key parameters investigated in the present study included the type of foam concrete (fly ash and sand), the density of foam concrete (1000, 1200 and 1400 kg/m3), and the impact velocity (3.0, …

A Novel Multi-Agent-Based Collaborative Virtual Manufacturing Environment Integrated With Edge Computing Technique, Xiaohui Zhang, Shufeng Tang, Xinhua Liu, Reza Malekian, Zhixiong Li

Faculty of Engineering and Information Sciences - Papers: Part B

This paper proposes a multi-agent-based collaborative virtual manufacturing environment (VME) to save energy consumption and improve efficiency in the manufacturing process. In order to achieve the high autonomy of the manufacturing system, a multi-agent system (MAS) is designed to build a collaborative VME. In this new VME environment, edge computing is embedded to strengthen the cyber resource utilization and system economy. Moreover, an efficient communication channel between networks is proposed. The subsequent cooperation and collaboration protocols among agents are designed to ensure flexible and process-oriented operations. Furthermore, the fuzzy resolution algorithm is employed to resolve the competition conflicts among function-similar …

Experimental Investigations On The Behavior Of Gfrp Bar Reinforced Hsc And Uhsc Beams Under Static And Impact Loading, M W. Goldston, Alex M. Remennikov, Zein Saleh, M Neaz Sheikh

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an experimental investigation into the behavior of Glass Fiber-Reinforced Polymer (GFRP) bar reinforced high strength concrete and ultra-high strength concrete beams. In total, twelve GFRP bar reinforced concrete beams (GFRP-RC beams) were constructed and tested. Six GFRP-RC beams were tested under static loading. Higher strength concrete was found to influence the overall behavior of GFRP-RC beams under static loading in terms of load carrying capacity, deflection, and post-cracking bending stiffness. Six GFRP-RC beams were tested under impact loading at various levels of impact energy. The GFRP-RC beams displayed a shift in the failure mode (from shear failure …

A New Generation Of Magnetorheological Vehicle Suspension System With Tunable Stiffness And Damping Characteristics, Shuaishuai Sun, Xin Tang, Jian Yang, Donghong Ning, Haiping Du, Shiwu Zhang, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

As the concept of variable stiffness (VS) and variable damping (VD) has increasingly drawn attention because of its superiority on reducing unwanted vibrations, dampers with property of varying stiffness and damping have been an attractive method to further improve vehicle performance and driver comfort. This paper presents the design, prototyping, modeling, and experimental evaluation of a VS and VD magnetorheological (MR) vehicle suspension system. It was first characterized by an INSTRON machine. Then, a phenomenological model was proposed to capture the characteristics of the damper and TS fuzzy approach was used to model the quarter car system where the proposed …

Naf Pet/Ct For Response Assessment Of Prostate Cancer Bone Metastases Treated With Single Fraction Stereotactic Ablative Body Radiotherapy, Nicholas G. Hardcastle, Michael S. Hofman, Ching-Yu Lee, Jason Callahan, Lisa Selbie, Farshad Foroudi, Mark Shaw, Sarat Chander, Andrew Lim, Brent Chesson, Declan G. Murphy, Tomas Kron, Shankar Siva

Faculty of Engineering and Information Sciences - Papers: Part B

Introduction: In prostate cancer patients, imaging of bone metastases is enhanced through the use of sodium fluoride positron emission tomography (18F-NaF PET/CT). This imaging technique shows areas of enhanced osteoblastic activity and blood flow. In this work, 18F-NaF PET/CT was investigated for response assessment to single fraction stereotactic ablative body radiotherapy (SABR) to bone metastases in prostate cancer patients. Methods: Patients with bone metastases in a prospective trial treated with single fraction SABR received a 18F-NaF PET/CT scan prior to and 6 months post-SABR. The SUVmax in the tumour was determined and the difference between before and after SABR determined. …

New Applications, New Global Audiences: Educators Repurposing And Reusing 3d Virtual And Immersive Learning Resources, Sue Gregory, Judy O'Connell, Des Butler, Marcus Mcdonald, Tom Kerr, Stefan Schutt, Lisa Jacka, Deborah Corder, Merle Hearns, Suku Sukunesan, Brent Gregory, Scott Grant, Yvonne Masters, Sasha Nikolic, Sarah De Freitas, Jenny Sim, Jo Doyle, Torsten Reiners, Robert Cox, Kim Flintoff, Denise Wood, Mathew Hillier, Frederick Stokes-Thompson, Dave Ellis, Helen Farley, Belma Gaukrodger, Phil Blyth, Dale Linegar, Jay Jay Jegathesan, Leah Irving

Faculty of Engineering and Information Sciences - Papers: Part B

ASCILITE 2015 - Australasian Society for Computers in Learning and Tertiary Education, Conference Proceedings.All right reserved. There continues to be strong interest among established, experienced academic users of 3D virtual environments for their sustained educational use. Consistent with global trends, they plan to further develop and optimise existing applications, reuse skills and experiences gained to develop new applications, and to share and reuse existing virtual resources. This is against a background of varied support from institutions, colleagues, students, funding bodies and also changing understanding and awareness of virtual environments and virtual reality by the general community as a result of …

Leveraging Smote In A Two-Layer Model For Prediction Of Protein-Protein Interactions, Huaming Chen, Lei Wang, Chi-Hung Chi, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part B

The research of the mechanisms of infectious diseases between host and pathogens remains a hot topic. It takes stock of the interactions data between host and pathogens, including proteins and genomes, to facilitate the discoveries and prediction of underlying mechanisms. However, the incomplete protein-protein interactions data impediment the advances in this exploration and solicit the wet-lab experiments to examine and verify the latent interactions. Although there have been numerous studies trying to leverage the computational models, especially machine learning models, the performances of these models were not good enough to produce high-fidelity candidates of interactions data due to the nature …

A Crystal Plasticity Fem Investigation Of A Cu Single Crystal Processed By Accumulative Roll-Bonding, Hui Wang, Cheng Lu, Anh Kiet Tieu

Faculty of Engineering and Information Sciences - Papers: Part B

In this study, texture modelling of a copper single crystal processed by accumulative roll-bonding (ARB) was conducted for the first time. A crystal plasticity finite element method (CPFEM) model was developed, and the predicated textures were validated by the experimental observations conducted by another research group. A heterogeneous through-thickness deformation was revealed. Two types of matrix bands formed through the thickness after the first ARB cycle, and different crystal rotation, slip system activation, and shear strain evolved in matrix bands. Due to the cutting, stacking and roll-bonding involved in ARB, transition of deformation behaviours has been found after a position …

Facilitating Social Learning In Teacher Education: A Case Study, Emmy Vrieling, A Van Den Beemt, Maarten F. De Laat

Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers

It is increasingly recognised that social learning by teachers can stimulate professional development. In this study, we search for the social behaviour patterns which can act as a catalyst for professional development, with an explicit focus on student teachers' learning. Based on the 'Dimensions of Social Learning (DSL) Framework', including 4 dimensions and 11 indicators of social learning, the present study explores the social configuration of one network of primary teachers (n = 12), student teachers (n = 12) and teacher educators (n = 2). Two research questions guide this exploration: (1) What patterns of social behaviour in teacher networks …