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Articles 1 - 19 of 19
Full-Text Articles in Social and Behavioral Sciences
Ion Radiography As A Tool For Patient Set-Up & Image Guided Particle Therapy: A Monte Carlo Study, Nicolas Depauw, Marta F. Dias, Anatoly B. Rosenfeld, Joao C. Seco
Ion Radiography As A Tool For Patient Set-Up & Image Guided Particle Therapy: A Monte Carlo Study, Nicolas Depauw, Marta F. Dias, Anatoly B. Rosenfeld, Joao C. Seco
Faculty of Engineering and Information Sciences - Papers: Part A
This study investigate the use of ion radiography as a tool for patient set-up and tumor tracking capabilities for image guided particle therapy (IGPT) using Monte Carlo simulations. One pediatric, two lung and one liver cancer patients were considered in this study. For each patient, 230 and 330 MeV proton, and 500 MeV/nucleon carbon ion pencil beams were simulated through their computed tomography (CT) data set using GEANT4.9.0. Energy, position and direction cosines of each particle were recorded in front and behind the patient. Ion radiographs were subsequently reconstructed using a dedicated in-house software. The image quality was assessed by …
A Coastal Groundwater Management Model With Indian Case Study, Sudip Basack, Amartya Kumar Bhattacharya, Prabir Maity
A Coastal Groundwater Management Model With Indian Case Study, Sudip Basack, Amartya Kumar Bhattacharya, Prabir Maity
Faculty of Engineering and Information Sciences - Papers: Part A
The complexity of the hydrogeological setup in coastal areas calls for the adoption of scientific groundwater management techniques. Excessive withdrawal of groundwater in coastal zones will lead to depression of the water table, with associated hazards such as putting the well out of use, rendering abstraction uneconomic with increased lift. A sustained regional groundwater drawdown below sea level runs the risk of saline water intrusion, even for confined coastal aquifers. Uncontrolled groundwater development may lead to reversal of the freshwater gradient, thereby resulting in saline water ingress into coastal aquifers. There are, however, several established methodologies to control and minimise …
Roles Of Social Media In Open Data Environments: A Case Study Of The 2014 Indonesian Presidential Election Voting Results, Uuf Brajawidagda, Akemi T. Chatfield
Roles Of Social Media In Open Data Environments: A Case Study Of The 2014 Indonesian Presidential Election Voting Results, Uuf Brajawidagda, Akemi T. Chatfield
Faculty of Engineering and Information Sciences - Papers: Part A
Open data initiatives are critical to open government policies which promote transparency, citizen engagement and collaboration. However, they face challenges in realizing their potential benefits through citizens' active engagement. Despite the sharp rise of social media use by governments or quasi-governmental organizations to engage citizens in transforming public service quality and offers, very little has been written on enabling roles of social media in influencing the outcome of open data initiatives. This research examines the potential enabling roles of social media in motivating and having citizens' engagement easier in open data environments. Specifically, we present social media use in supporting …
Vacancy-Type Defects Study On Ultra-Fine Grained Aluminium Processed By Severe Plastic Deformation, Li-Jun Su, C Lu, Guanyu Deng, A Kiet Tieu, L C. Zhang, P Guagliardo, S N. Samarin, J F. Williams
Vacancy-Type Defects Study On Ultra-Fine Grained Aluminium Processed By Severe Plastic Deformation, Li-Jun Su, C Lu, Guanyu Deng, A Kiet Tieu, L C. Zhang, P Guagliardo, S N. Samarin, J F. Williams
Faculty of Engineering and Information Sciences - Papers: Part A
Vacancy-type defects play an important role in the metal materials deformed by severe plastic deformation (SPD). The present work use positron annihilation lifetime spectroscopy (PALS) to test the vacancy-type defects in aluminium alloys processed by equal channel angular pressing (ECAP) and accumulative roll bonding (ARB). ECAP at room temperature and cryogenic temperature was conducted to AA1050 and ARB with 200 C preheating was conducted to AA1050 and AA6061 to produce laminated AA1050 sheets, AA6061 sheets and AA1050/AA6061 composites. High fraction of vacancy-type defects were detected in all the deformed samples. Vacancies associated with dislocations and bulk mono-vacancies have been identified …
Numerical Study On Springback With Size Effect In Micro V-Bending, Zhi Fang, Haina Lu, Dongbin Wei, Zhengyi Jiang, Xianming Zhao, Di Wu
Numerical Study On Springback With Size Effect In Micro V-Bending, Zhi Fang, Haina Lu, Dongbin Wei, Zhengyi Jiang, Xianming Zhao, Di Wu
Faculty of Engineering and Information Sciences - Papers: Part A
With the development of microforming technology, the demand on accuracy of the metallic micro components is elevating. While springback phenomenon which is inevitable during bending process, can cause unpredicted dimensional error, bringing difficulties to the downstream assembly, and let alone the springback in microforming as the measurements of tools and workpieces downsize hundreds even thousands times. This paper focuses on the springback effect that occurs after the micro Vbending a classic processing method to manufacture microparts. Numerical simulation has been conducted to investigate the size effect in terms of Voronoi tessellation and springback. A finite element (FE) model of the …
A Comparative Study For Wear Resistant Of Stellite 6 Coatings On Nickel Alloy Substrate Produced By Laser Cladding, Hvof And Plasma Spraying Techniques, Alain Kusmoko, Druce P. Dunne, Huijun Li
A Comparative Study For Wear Resistant Of Stellite 6 Coatings On Nickel Alloy Substrate Produced By Laser Cladding, Hvof And Plasma Spraying Techniques, Alain Kusmoko, Druce P. Dunne, Huijun Li
Faculty of Engineering and Information Sciences - Papers: Part A
Stellite 6 coatings were deposited using laser cladding, high velocity oxygen fuel (HVOF) thermal spraying and plasma spraying techniques on a nickel alloy substrate. The surface roughness, chemical composition and microstructure of these coatings were characterised by a surface profilometer, optical microscopy (OM) and scanning electron microscopy (SEM). The microhardness of the coatings was measured and the wear behaviour of the coatings was examined under controlled test conditions in a pin-on-plate (reciprocating) tribometer. The results showed that fully dense and crack-free laser clad Stellite 6 coatings can be formed on a high nickel steel substrate. Average microhardness values of the …
Temporal And Parametric Study Of Traveller Preference Heterogeneity Using Random Parameter Logit Model, Ahm Mehbub Anwar, A Kiet Tieu, Peter Gibson, Matthew J. Berryman, Khin Than Win, Andrew Mccusker, Pascal Perez
Temporal And Parametric Study Of Traveller Preference Heterogeneity Using Random Parameter Logit Model, Ahm Mehbub Anwar, A Kiet Tieu, Peter Gibson, Matthew J. Berryman, Khin Than Win, Andrew Mccusker, Pascal Perez
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Time Spent On Daytime Direct Care Activities By Personal Carers In Two Australian Residential Aged Care Facilities: A Time-Motion Study, Siyu Qian, Ping Yu, David M. Hailey, Zhenyu Zhang, Pam Davy, Mark I. Nelson
Time Spent On Daytime Direct Care Activities By Personal Carers In Two Australian Residential Aged Care Facilities: A Time-Motion Study, Siyu Qian, Ping Yu, David M. Hailey, Zhenyu Zhang, Pam Davy, Mark I. Nelson
Faculty of Engineering and Information Sciences - Papers: Part A
Objective. To examine the time, frequency and duration of each direct care activity conducted by personal carers in Australian residential aged care homes. Methods. A time-motion study was conducted to observe 46 personal carers at two high-care houses in two facilities (14 days at Site 1 and 16 days at Site 2). Twenty-three direct care activities were classified into eight categories for analysis. Results. Overall, a personal carer spent approximately 45% of their time on direct care, corresponding to 3.5 h in an 8-h daytime shift. The two sites had similar ratios of personal carers to residents, and each resident …
A Cross-Cultural Study Of Intrusiveness And Fluency Effects Of Web Ads, Xinwei Wang, Tingru Cui, Hock Hai Teo
A Cross-Cultural Study Of Intrusiveness And Fluency Effects Of Web Ads, Xinwei Wang, Tingru Cui, Hock Hai Teo
Faculty of Engineering and Information Sciences - Papers: Part A
Advertising online has increasingly become an important marketing strategy. Along with the rising ad dollars invested on the web, marketers have also devised more powerful ad delivery tactics to garner online consumers' attention. These powerful online advertising tactics may result in intrusiveness perceptions and processing fluency effects. As Westerners tend to focus on the focal object whereas East Asians tend to pay attention to the focal object and contextual background simultaneously when processing a visual scene, East Asians' and Westerners' culturally divergent visual processing styles would lead them to develop varying intrusiveness perceptions and experience differential processing fluency when exposed …
Study On Hot-Working Behavior Of High Carbon Steel / Low Carbon Steel Composite Material Using Processing Map, Xingjian Gao, Zhengyi Jiang, Dongbin Wei, Sihai Jiao, Dengfu Chen
Study On Hot-Working Behavior Of High Carbon Steel / Low Carbon Steel Composite Material Using Processing Map, Xingjian Gao, Zhengyi Jiang, Dongbin Wei, Sihai Jiao, Dengfu Chen
Faculty of Engineering and Information Sciences - Papers: Part A
The high carbon steel (HCS)/low carbon steel (LCS) laminated composite made by centrifugal casting technology was subjected to hot compression tests on Gleeble 3500 thermomechanical simulator in a range of temperatures (800-1100 oC) and strain rates (0.02-10 s-1). The hot-working behavior of the laminate was characterised by analysing the flow stress-strain curves and constructing the processing map based on dynamic materials model via superimposing efficiency of power dissipation and flow instability maps. The safe and unsafe processing conditions were identified in the processing map which was validated by microstructural examinations. Banded microstructure and micro-shear cracks occurred in the unsafe domains …
A Study Surface Layer And Hardness Produced By Induction Hardened S45c Steel, Alain Parisianto, Rosfian Dahar, Huijun Li, Syamsul Hadi
A Study Surface Layer And Hardness Produced By Induction Hardened S45c Steel, Alain Parisianto, Rosfian Dahar, Huijun Li, Syamsul Hadi
Faculty of Engineering and Information Sciences - Papers: Part A
A cylinder of Carbon Steel S45C with a ferrite and pearlite structure was analysed to improve the hardness and surface layer as well as the toughness. Accordingly, it is important to undertake a heat treatment process for the hardness and surface layer of this steel. The heat teatment process was carried out using induction heating with five different temperatures of 800°C, 900°C, 1000°C, 1100°C and 1200 °C followed by water quenching with certain cooling speed. The chemical compositions and microstructures of these samples were characterized by spectrometer and optical microscopy. The microhardness of the samples was measured and the surface …
A Study Of Plastic Deformation Behavior During High Pressure Torsion Process By Crystal Plasticity Finite Element Simulation, Peitang Wei, Cheng Lu, A K. Tieu, Guanyu Deng
A Study Of Plastic Deformation Behavior During High Pressure Torsion Process By Crystal Plasticity Finite Element Simulation, Peitang Wei, Cheng Lu, A K. Tieu, Guanyu Deng
Faculty of Engineering and Information Sciences - Papers: Part A
High pressure torsion (HPT) is an efficient technique of producing ultrafine grained materials with exceptional small grain size. In this study, a crystal plasticity finite element method (CPFEM) model has been developed to investigate the plastic deformation behavior of pure aluminum single crystal during the HPT process. The simulation results show that, the distribution and evolution of the macroscopic plastic strain and the accumulative shear strain are similar. The value increases with the increase of the distance from the center as well as the number of revolution. The simulation is capable of reflecting the anisotropic characteristics of HPT deformation, a …
Concept And Simulation Study Of A Novel Localization Method For Robotic Endoscopic Capsules Using Multiple Positron Emission Markers, Trung Duc Than, Gursel Alici, Steven Harvey, Hao Zhou, Weihua Li
Concept And Simulation Study Of A Novel Localization Method For Robotic Endoscopic Capsules Using Multiple Positron Emission Markers, Trung Duc Than, Gursel Alici, Steven Harvey, Hao Zhou, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
Purpose: Over the last decade, wireless capsule endoscope has been the tool of choice for noninvasive inspection of the gastrointestinal tract, especially in the small intestine. However, the latest clinical products have not been equipped with a sufficiently accurate localization system which makes it difficult to determine the location of intestinal abnormalities, and to apply follow-up interventions such as biopsy or drug delivery. In this paper, the authors present a novel localization method based on tracking three positron emission markers embedded inside an endoscopic capsule. Methods: Three spherical 22Na markers with diameters of less than 1 mm are embedded in …
Understanding Demographics Influence On Teleconsultation Acceptance In Hospital: A Mixed-Method Study, Nurazean Maarop, Khin T. Win, Sukdershan Singh Hs
Understanding Demographics Influence On Teleconsultation Acceptance In Hospital: A Mixed-Method Study, Nurazean Maarop, Khin T. Win, Sukdershan Singh Hs
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study is to explore and understand the influence of demographic factors on teleconsultation acceptance in Malaysian government hospitals. The materials of this study are based on an exploratory mixed-method study involving semi-structured interviews with key informants and questionnaires survey of health care providers. The prominent influence of demographic aspects over the acceptance of teleconsultation technology from the mixed methods standpoint is further discussed. The findings of both results provide evidence to suggest that teleconsultation acceptance differs across the types of hospital, distance between referring and referral hospital, role of teleconsultation, and user's computer ability. Interestingly, user's …
Improved Workflow Modelling Using Role Activity Diagram-Based Modelling With Application To A Radiology Service Case Study, Nagesh Shukla, John Keast, Darek Ceglarek
Improved Workflow Modelling Using Role Activity Diagram-Based Modelling With Application To A Radiology Service Case Study, Nagesh Shukla, John Keast, Darek Ceglarek
Faculty of Engineering and Information Sciences - Papers: Part A
The modelling of complex workflows is an important problem-solving technique within healthcare settings. However, currently most of the workflow models use a simplified flow chart of patient flow obtained using on-site observations, groupbased debates and brainstorming sessions, together with historic patient data. This paper presents a systematic and semi-automatic methodology for knowledge acquisition with detailed process representation using sequential interviews of people in the key roles involved in the service delivery process. The proposed methodology allows the modelling of roles, interactions, actions, and decisions involved in the service delivery process. This approach is based on protocol generation and analysis techniques …
Geometrical And Fea Study On Millipede Forming, Lingran Kong, Di Tang, Shichao Ding, Yuankun Zhang
Geometrical And Fea Study On Millipede Forming, Lingran Kong, Di Tang, Shichao Ding, Yuankun Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
Millipede Forming is an innovative sheet metal forming approach that has been proposed and developed in Australia. U-channels, Z-channels or tubular products can be made by Millipede Forming. While a strip moves through an optimal transitional surface between the entry to exit of a forming stand, the redundant longitudinal membrane strain can be significantly reduced compared to the conventional roll forming, which is the essential principle to obtaining high quality products. The incremental forming process studied has demonstrated major advantages on space efficiency, power consumption and materials sensitivities. The purpose of this study is to investigate the effects of main …
Sodium Hydroxide Production From Sodium Carbonate And Bicarbonate Solutions Using Membrane Electrolysis: A Feasibility Study, Alexander R. Simon, Takahiro Fujioka, William Price, Long Nghiem
Sodium Hydroxide Production From Sodium Carbonate And Bicarbonate Solutions Using Membrane Electrolysis: A Feasibility Study, Alexander R. Simon, Takahiro Fujioka, William Price, Long Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
This study demonstrates the feasibility of producing NaOH from coal seam gas (CSG) brine by membrane electrolysis.
Comparative Study Of Vehicle Tyre-Road Friction Coefficient Estimation With A Novel Cost-Effective Method, Boyuan Li, Haiping Du, Weihua Li
Comparative Study Of Vehicle Tyre-Road Friction Coefficient Estimation With A Novel Cost-Effective Method, Boyuan Li, Haiping Du, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
This paper qualitatively and quantitatively reviews and compares three typical tyre-road friction coefficient estimation methods, which are the slip slope method, individual tyre force estimation method and extended Kalman filter method, and then presents a new cost-effective tyre-road friction coefficient estimation method. Based on the qualitative analysis and the numerical comparisons, it is found that all of the three typical methods can successfully estimate the tyre force and friction coefficient in most of the test conditions, but the estimation performance is compromised for some of the methods during different simulation scenarios. In addition, all of these three methods need global …
Feasibility Study On The Implementation Of Ieee 802.11 On Cloud-Based Radio Over Fibre Architecture, Sen Zhang, Daniel Franklin
Feasibility Study On The Implementation Of Ieee 802.11 On Cloud-Based Radio Over Fibre Architecture, Sen Zhang, Daniel Franklin
Faculty of Engineering and Information Sciences - Papers: Part A
This paper investigates the throughput performance of the IEEE 802.11 MAC when the physical layer is implemented remotely on a cloud-based SDR platform. An analytical model which considers a non-zero late ACK arrival probability is proposed to analyse throughput performance. Both conventional DCF and the Block ACK enhancement from current IEEE 802.11 standards are analysed using the proposed model. Results show that the network delay variance significantly degrades the performance of conventional DCF while enabling Block ACK significantly reduces this degradation.