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Full-Text Articles in Social and Behavioral Sciences
Field Study Of Air Conditioning And Thermal Comfort In Residential Buildings, Jungsoo Kim, Richard De Dear, Tom Parkinson, Christhina Candido, Paul Cooper, Zhenjun Ma, Wasim Saman
Field Study Of Air Conditioning And Thermal Comfort In Residential Buildings, Jungsoo Kim, Richard De Dear, Tom Parkinson, Christhina Candido, Paul Cooper, Zhenjun Ma, Wasim Saman
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study is to better understand the external and internal drivers that affect residential air-conditioning (A/C) use decisions and occupant comfort. Field observations were carried out using instrumental measurements and smartphone questionnaires, recording householder's A/C usage patterns, indoor/outdoor climatic factors, perception of thermal comfort and adaptive behaviours.
Field Assessment Of Ballasted Railroads Using Geosynthetics And Shock Mats, Sanjay Nimbalkar, Buddhima Indraratna
Field Assessment Of Ballasted Railroads Using Geosynthetics And Shock Mats, Sanjay Nimbalkar, Buddhima Indraratna
Faculty of Engineering and Information Sciences - Papers: Part A
The ballasted railroads form an integral part of the modern transportation infrastructure in Australia. However, they are subjected to large stresses especially on mixed traffic lines, where heavy freight trains are operated. Under such adverse operational conditions, ballast progressively degrades contributing to overall track deformations and frequent maintenance. Maintaining geometry of ballast embankments is necessary to improve safety and efficiency of railway operations. The use of artificial inclusions (geosynthetics and shock mats) as well as recycled (discarded) ballast in track can be economically viable options. In order to gain more insight, the CGRE has conducted extensive field trials on two …
On The Classical Solvability Of Near Field Reflector Problems, Jiakun Liu, Neil Trudinger
On The Classical Solvability Of Near Field Reflector Problems, Jiakun Liu, Neil Trudinger
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper we prove the existence of classical solutions to near field reflector problems, both for a point light source and for a parrallel light source, with planar recievers. These problems involve monge-Ampere type equations, subject to nonlinear oblique boundary conditions. Our approach builds on earlier work in the optimal transportation case by Trudinger and Wang and makes use of a recent extension of degree theory to oblique boundary conditioins by Li, Liu and Nguyen.
A Local Field Correlated And Monte Carlo Based Shallow Neural Network Model For Non-Linear Time Series Prediction, Qingguo Zhou, Huaming Chen, Hong Zhao, Gaofeng Zhang, Jianming Yong, Jun Shen
A Local Field Correlated And Monte Carlo Based Shallow Neural Network Model For Non-Linear Time Series Prediction, Qingguo Zhou, Huaming Chen, Hong Zhao, Gaofeng Zhang, Jianming Yong, Jun Shen
Faculty of Engineering and Information Sciences - Papers: Part A
Water resource problems currently are much more important in proper planning especially for arid regions, such as Gansu in China. For agricultural and industrial activities, prediction of groundwater status is critical. As a main branch of neural network, shallow artificial neural network models have been deployed in prediction areas such as groundwater and rainfall since late 1980s. In this paper, artificial neural network (ANN) model within a newly proposed algorithm has been developed for groundwater status forecasting. Having considered previous algorithms for ANN model in time series forecast, this new Monte Carlo based algorithm demonstrated a good result. The experiments …
Optimization Of The Number Of Rays In Interpolation For Light Field Based Free Viewpoint Systems, Hooman Shidanshidi, Farzad Safaei, Wanqing Li
Optimization Of The Number Of Rays In Interpolation For Light Field Based Free Viewpoint Systems, Hooman Shidanshidi, Farzad Safaei, Wanqing Li
Faculty of Engineering and Information Sciences - Papers: Part A
Light field (LF) rendering is widely used in free viewpoint video systems (FVV). Different methods have been proposed to employ depth maps to improve the rendering quality. However, estimation of depth is often error-prone. In this paper, a new method based on the concept of effective sampling density (ESD) is proposed for evaluating the depth-based LF rendering algorithms at different levels of errors in the depth estimation. In addition, for a given rendering quality, we provide an estimation of number of rays required in the interpolation algorithm to compensate for the adverse effect caused by errors in depth maps. The …
An Assessment Of Image Distortion And Ct Number Accuracy Within A Wide-Bore Ct Extended Field Of View, Bradley Beeksma, D Truant, Lois C. Holloway, Sankar Arumugam
An Assessment Of Image Distortion And Ct Number Accuracy Within A Wide-Bore Ct Extended Field Of View, Bradley Beeksma, D Truant, Lois C. Holloway, Sankar Arumugam
Faculty of Engineering and Information Sciences - Papers: Part A
Although wide bore computed tomography (CT) scanners provide increased space for patients, the scan field of view (sFOV) remains considerably smaller than the bore size. Consequently, patient anatomy which spans beyond the sFOV is truncated and the information is lost. As a solution, some manufacturers provide the capacity to reconstruct CT images from a partial dataset at an extended field of view (eFOV). To assess spatial distortion within this eFOV three phantoms were considered a 30 x 30 x 20 cm3 slab of solid water, the Gammex electron density CT phantom and a female anthropomorphic phantom. For each phantom, …
Estimation Of Signal Distortion Using Effective Sampling Density For Light Field-Based Free Viewpoint Video, Hooman Shidanshidi, Farzad Safaei, Wanqing Li
Estimation Of Signal Distortion Using Effective Sampling Density For Light Field-Based Free Viewpoint Video, Hooman Shidanshidi, Farzad Safaei, Wanqing Li
Faculty of Engineering and Information Sciences - Papers: Part A
In a light field-based free viewpoint video (LF-based FVV) system, effective sampling density (ESD) is defined as the number of rays per unit area of the scene that has been acquired and is selected in the rendering process for reconstructing an unknown ray. This paper extends the concept of ESD and shows that ESD is a tractable metric that quantifies the joint impact of the imperfections of LF acquisition and rendering. By deriving and analyzing ESD for the commonly used LF acquisition and rendering methods, it is shown that ESD is an effective indicator determined by system parameters and can …
War Robots And The 2014 World Cup - Defenders Off The Field, Katina Michael, M G. Michael
War Robots And The 2014 World Cup - Defenders Off The Field, Katina Michael, M G. Michael
Faculty of Engineering and Information Sciences - Papers: Part A
High-tech robots called PackBots will be unleashed during the 2014 FIFA World Cup in Brazil to help boost security and examine suspicious objects. The Brazilian government purportedly spent US$7.2 million to buy 30 military-grade robots from designers iRobot that will police the stadiums throughout Brazil's 12 host cities during soccer matches. PackBot is a hunk of metal with an extendable arm and tactile claw, jam-packed on-board sensors and a computer with overheat protection, nine high-resolution cameras and lasers and two-way audio. But is it overkill to implement wartime robots to a sporting event?
Small Field In-Air Output Factors: The Role Of Miniphantom Design And Dosimeter Type, Kirbie Warrener, Benjamin Hug, Paul Liu, Anna Ralston, Martin A. Ebert, David Mckenzie, Natalka Suchowerska
Small Field In-Air Output Factors: The Role Of Miniphantom Design And Dosimeter Type, Kirbie Warrener, Benjamin Hug, Paul Liu, Anna Ralston, Martin A. Ebert, David Mckenzie, Natalka Suchowerska
Faculty of Engineering and Information Sciences - Papers: Part A
The commissioning of treatment planning systems and beam modeling requires measured input parameters. The measurement of relative output in-air, Sc is particularly difficult for small fields. The purpose of this study was to investigate the influence of miniphantom design and detector selection on measured Sc values for small fields and to validate the measurements against Monte Carlo simulations. Measurements were performed using brass caps (with sidewalls) or tops (no sidewalls) of varying heights and widths. The performance of two unshielded diodes (60012 and SFD), EBT2 radiochromic film, and a fiber optic dosimeter (FOD) were compared for fields defined by MLCs …
Closed-Orbit Dependence On The Field Direction In The Anisotropic Diamagnetic Kepler Problem, A Bruno-Alfonso, Colin Bleasdale, Gustavo Alvarez, R A. Lewis
Closed-Orbit Dependence On The Field Direction In The Anisotropic Diamagnetic Kepler Problem, A Bruno-Alfonso, Colin Bleasdale, Gustavo Alvarez, R A. Lewis
Faculty of Engineering and Information Sciences - Papers: Part A
The classical orbits of an electron with anisotropic mass interacting with a Coulomb center in the presence of a magnetic field are investigated. It is shown that the shape and duration of the closed orbits depend on the magnetic-field direction. Reasonable agreement with available experimental results for donor-doped silicon samples in a magnetic field is found, when the energy value of the conduction electron is appropriately chosen.
Spherical, Cylindrical And Tetrahedral Symmetries; Hydrogenic States At High Magnetic Field In Si:P, R A. Lewis, A Bruno-Alfonso, G V B De Souza, R E M Vickers, J A Colla, E Constable
Spherical, Cylindrical And Tetrahedral Symmetries; Hydrogenic States At High Magnetic Field In Si:P, R A. Lewis, A Bruno-Alfonso, G V B De Souza, R E M Vickers, J A Colla, E Constable
Faculty of Engineering and Information Sciences - Papers: Part A
Phosphorous donors in silicon have an electronic structure that mimics the hydrogen atom, albeit on a larger length, smaller energy and smaller magnetic field scale. While the hydrogen atom is spherically symmetric, an applied magnetic field imposes cylindrical symmetry, and the solid-state analogue involves, in addition, the symmetry of the Si crystal. For one magnetic field direction, all six conduction-band valleys of Si:P become equivalent. New experimental data to high laboratory fields (30 T), supported by new calculations, demonstrate that this high symmetry field orientation allows the most direct comparison with free hydrogen.
Impact Of The Mlc On The Mri Field Distortion Of A Prototype Mri-Linac, Stefan Kolling, Brad Oborn, Paul Keall
Impact Of The Mlc On The Mri Field Distortion Of A Prototype Mri-Linac, Stefan Kolling, Brad Oborn, Paul Keall
Faculty of Engineering and Information Sciences - Papers: Part A
Purpose: To cope with intrafraction tumor motion, integrated MRI-linac systems for real-time image guidance are currently under development. The multileaf collimator (MLC) is a key component in every state-of-the-art radiotherapy treatment system, allowing for accurate field shaping and tumor tracking. This work quantifies the magnetic impact of a widely used MLC on the MRI field homogeneity for such a modality. Methods: Results: Conclusions: This work shows that the MRI field distortions caused by the MLC cannot be ignored and must be thoroughly investigated for any MRI-linac system. The numeric distortion values obtained for our1.0T magnet may vary for other magnet …
Inter-Occlusion Reasoning For Human Detection Based On Variational Mean Field, Duc Thanh Nguyen, Wanqing Li, Philip O. Ogunbona
Inter-Occlusion Reasoning For Human Detection Based On Variational Mean Field, Duc Thanh Nguyen, Wanqing Li, Philip O. Ogunbona
Faculty of Engineering and Information Sciences - Papers: Part A
Detecting multiple humans in crowded scenes is challenging because the humans are often partially or even totally occluded by each other. In this paper, we propose a novel algorithm for partial inter-occlusion reasoning in human detection based on variational mean field theory. The proposed algorithm can be integrated with various part-based human detectors using different types of features, object representations, and classifiers. The algorithm takes as the input an initial set of possible human objects (hypotheses) detected using a part-based human detector. Each hypothesis is decomposed into a number of parts and the occlusion status of each part is inferred …
Analysis Of Temperature Field In Liquid-Solid Bimetal Casting Of Laminated Metal Composite, Xingjian Gao, Dongbin Wei, Zhengyi Jiang
Analysis Of Temperature Field In Liquid-Solid Bimetal Casting Of Laminated Metal Composite, Xingjian Gao, Dongbin Wei, Zhengyi Jiang
Faculty of Engineering and Information Sciences - Papers: Part A
In order to improve the low toughness and poor crack resistance of high chromium cast iron (HCCI), the laminated metal composite (LMC) consisting of HCCI and carbon steel has received increasingly attentions in modern industries. Considering that the controllable temperature field at interface of LMC is a key issue in liquid-solid bimetal casting process, a three layered finite element method (FEM) model has been proposed. The influence of parameters including pouring temperature - Tpour, preheating temperature - Tpre and effective volume ratio - VRe on temperature field are discussed. Simulation results show that the temperature at the interface between two …
Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes
Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes
Faculty of Engineering and Information Sciences - Papers: Part A
The use of electroactive polymeric materials for sensing and actuating applications is very attractive due to important properties like low operating voltage, low form factor, or high mechanical flexibility. However, its use has been conditioned by the lack of available processing methods for such materials. The deposition of thin layers is very easy by conventional techniques; however obtaining patterned layers is not a trivial task. This paper presents a methodology suitable to fabricate electroactive polymeric microstructures on large area devices. Structures ranging from ∼1, 5 mm to ∼100 μm width, with a thickness of ∼12 μm, were obtained.
Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui
Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui
Faculty of Engineering and Information Sciences - Papers: Part A
The roll-casting technology of 5000 series aluminum alloy is one of the difficulties at present. Roll-casting technology was employed in this paper and high quality 5005 aluminum alloy sheets were fabricated successfully under different conditions. The solidification of melt in roll-casting process is the rapid directional solidification. The effect of magnetostatic field on microstructure of 5005 aluminum alloy sheet by roll-casting has been investigated and analyzed. The results indicate that imposing magnetostatic field can refine the grains of 5005 aluminum alloy.
Numerical Simulation Of Temperature Field And Thermal Stress Field Of Work Roll During Hot Strip Rolling, Chang-Sheng Li, Hai-Liang Yu, Guan-Yu Deng, Xiang-Hua Liu, Guo-Dong Wang
Numerical Simulation Of Temperature Field And Thermal Stress Field Of Work Roll During Hot Strip Rolling, Chang-Sheng Li, Hai-Liang Yu, Guan-Yu Deng, Xiang-Hua Liu, Guo-Dong Wang
Faculty of Engineering and Information Sciences - Papers: Part A
Based on the thermal conduction equations, the three-dimensional (3D) temperature field of a work roll was investigated using finite element method (FEM). The variations in the surface temperature of the work roll during hot strip rolling were described, and the thermal stress field of the work roll was also analyzed. The results showed that the highest roll surface temperature is 593 °C, and the difference between the minimum and maximum values of thermal stress of the work roll surface is 145. 7 MPa. Furthermore, the results of this analysis indicate that temperature and thermal stress are useful parameters for the …
Mine Boundary Detection Using Markov Random Field Models, Xia Hua, Jennifer L. Davidson, Noel A. Cressie
Mine Boundary Detection Using Markov Random Field Models, Xia Hua, Jennifer L. Davidson, Noel A. Cressie
Faculty of Engineering and Information Sciences - Papers: Part A
Detection of objects in images in an automated fashion is necessary for many applications, including automated target recognition. In this paper, we present results of boundary detection using Markov random fields. Once the boundaries of regions are detected, object recognition can be conducted to classify the regions within the boundaries. Thus, an approach that gives good boundary detection is very important in many automated target recognition systems. Our algorithm for boundary detection combines a Bayesian approach with a histogram specification technique to locate edges of objects that have a closed-loop boundary. The boundary image is modeled by a Markov random …
Efficiency Of Neighbour Analysis For Replicated Variety Trials In Australia, Brian R. Cullis, A. C. Gleeson
Efficiency Of Neighbour Analysis For Replicated Variety Trials In Australia, Brian R. Cullis, A. C. Gleeson
Faculty of Engineering and Information Sciences - Papers: Part A
Use of a one-dimensional neighbour method of analysis in 1019 variety trials of a range of crops conducted by plant breeders in four states of Australia in 1985–87 resulted in an average reduction of 42% in variances of varietal yield differences compared with conventional randomized complete block analysis. Of these trials, 219 were designed as square, rectangular or generalized lattices and the average reduction in variances of varietal yields with incomplete block analysis and recovery of interblock information was 33%. The results emphasized that plots should be wide enough to avoid interplot competition, and that neighbour analysis is of most …
Relative Accuracy Of A Neighbour Method For Field Trials, W J. Lill, A C. Gleeson, Brian R. Cullis
Relative Accuracy Of A Neighbour Method For Field Trials, W J. Lill, A C. Gleeson, Brian R. Cullis
Faculty of Engineering and Information Sciences - Papers: Part A
Two scries of simulation experiments were used to investigate the accuracy of treatment and variance estimation with a neighbour analysis of field trials proposed by Gleeson & Cullis (1987). The first series examined the accuracy of residual maximum likelihood (REML) estimation of seven theoretical error models applicable to field trials. REML estimation provided accurate estimates of the variance parameters, but the Ftest of treatments was slightly biased upward (to +2·4%) for first differences models and slightly biased downwards (to –1·4%) for second differences models. The second series of simulations, based on 19 uniformity data sets, illustrated that treatment effects were …