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Full-Text Articles in Social and Behavioral Sciences

Threshold Broadcast Encryption With Keyword Search, Shiwei Zhang, Yi Mu, Guomin Yang Jan 2016

Threshold Broadcast Encryption With Keyword Search, Shiwei Zhang, Yi Mu, Guomin Yang

Faculty of Engineering and Information Sciences - Papers: Part A

Many users store their data in a cloud, which might not be fully trusted, for the purpose of convenient data access and sharing. For efficiently accessing the stored data, keyword search can be performed by the cloud server remotely with a single query from the user. However, the cloud server cannot directly search the data if it is encrypted. One of solutions could be to allow the user to download the encrypted data, in order to carry out a search; however, it might consume huge network bandwidth. To solve this problem, the notion of keyword search on encrypted data (searchable ...


Joint Pet-Mr Respiratory Motion Models For Clinical Pet Motion Correction, Richard Manber, Kris Thielemans, Brian F. Hutton, Simon Wan, Jamie Mcclelland, Anna Barnes, Simon R. Arridge, Sebastien Ourselin, David Atkinson Jan 2016

Joint Pet-Mr Respiratory Motion Models For Clinical Pet Motion Correction, Richard Manber, Kris Thielemans, Brian F. Hutton, Simon Wan, Jamie Mcclelland, Anna Barnes, Simon R. Arridge, Sebastien Ourselin, David Atkinson

Faculty of Engineering and Information Sciences - Papers: Part A

Patient motion due to respiration can lead to artefacts and blurring in positron emission tomography (PET) images, in addition to quantification errors. The integration of PET with magnetic resonance (MR) imaging in PET-MR scanners provides complementary clinical information, and allows the use of high spatial resolution and high contrast MR images to monitor and correct motion-corrupted PET data. In this paper we build on previous work to form a methodology for respiratory motion correction of PET data, and show it can improve PET image quality whilst having minimal impact on clinical PET-MR protocols. We introduce a joint PET-MR motion model ...


Finite Time Singularities For The Locally Constrained Willmore Flow Of Surfaces, James A. Mccoy, Glen Wheeler Jan 2016

Finite Time Singularities For The Locally Constrained Willmore Flow Of Surfaces, James A. Mccoy, Glen Wheeler

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper we study the steepest descent L2-gradient flow of the functional Wλ1,λ2, which is the the sum of the Willmore energy, λ1-weighted surface area, and λ2-weighted enclosed volume, for surfaces immersed in R3. This coincides with the Helfrich functional with zero `spontaneous curvature'. Our first results are a concentration-compactness alternative and interior estimates for the flow. For initial data with small energy, we prove preservation of embeddedness, and by directly estimating the Euler-Lagrange operator from below in L2 we obtain that the maximal time of existence is finite. Combining this result with ...


Universal Measurability And The Hochschild Class Of The Chern Character, Alan L. Carey, Adam C. Rennie, F Sukochev, Dima Zanin Jan 2016

Universal Measurability And The Hochschild Class Of The Chern Character, Alan L. Carey, Adam C. Rennie, F Sukochev, Dima Zanin

Faculty of Engineering and Information Sciences - Papers: Part A

We study notions of measurability for singular traces, and characterise universal measurability for operators in Dixmier ideals. This measurability result is then applied to improve on the various proofs of Connes' identification of the Hochschild class of the Chern character of Dixmier summable spectral triples. The measurability results show that the identification of the Hochschild class is independent of the choice of singular trace. As a corollary we obtain strong information on the asymptotics of the eigenvalues of operators naturally associated to spectral triples (A, H, D) and Hochschild cycles for A.


A Magnetically Actuated Drug Delivery System For Robotic Endoscopic Capsules, Fredy Munoz, Gursel Alici, Weihua Li Jan 2016

A Magnetically Actuated Drug Delivery System For Robotic Endoscopic Capsules, Fredy Munoz, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

There is an increasing need to incorporate an actively controlled drug delivery system (DDS) into the next generation of capsule endoscopy in order to treat diseases in the gastrointestinal tract in a noninvasive way. Despite a number of attempts to magnetically actuate drug delivery mechanisms embedded in endoscopic capsules, longer operating distances and further miniaturization of on-board components are still drawbacks of such systems. In this paper, we propose an innovative magnetic system that consists of an array of magnets, which activates a DDS, based on an overly miniaturized slider-crank mechanism. We use analytical models to compare the magnetic fields ...


Subject-Adaptive Integration Of Multiple Sice Brain Networks With Different Sparsity, Jianjia Zhang, Luping Zhou, Lei Wang Jan 2016

Subject-Adaptive Integration Of Multiple Sice Brain Networks With Different Sparsity, Jianjia Zhang, Luping Zhou, Lei Wang

Faculty of Engineering and Information Sciences - Papers: Part A

As a principled method for partial correlation estimation, sparse inverse covariance estimation (SICE) has been employed to model brain connectivity networks, which holds great promise for brain disease diagnosis. For each subject, the SICE method naturally leads to a set of connectivity networks with various sparsity. However, existing methods usually select a single network from them for classification and the discriminative power of this set of networks has not been fully exploited. This paper argues that the connectivity networks at different sparsity levels present complementary connectivity patterns and therefore they should be jointly considered to achieve high classification performance.In ...


Image Descriptors From Convnets: Comparing Global Pooling Methods For Image Retrieval, Ian Comor, Yan Zhao, Zhimin Gao, Luping Zhou, Lei Wang Jan 2016

Image Descriptors From Convnets: Comparing Global Pooling Methods For Image Retrieval, Ian Comor, Yan Zhao, Zhimin Gao, Luping Zhou, Lei Wang

Faculty of Engineering and Information Sciences - Papers: Part A

2016 IEEE.A major component of a generic image retrieval pipeline is producing concise and effective descriptors for each image. Previous works have shown impressive results in image retrieval when using descriptors from the black-box output of the fully-connected stage of pretrained Convolutional Neural Networks (ConvNets). However, previous work on descriptors pooled from the deep feature maps from late convolutional layers can produce more discriminative descriptors for generic image retrieval, while being relatively concise. When planning to globally pool such feature maps from a ConvNet, some options to consider are (1) the depth of the network, (2) choice of layer ...


Effect Of Mineral Matter On The Reactivity Of Coke And Its Replication In A Coke Analogue, Raymond Longbottom, Brian J. Monaghan, Azrin A. Chowdhury, Mark H. Reid, Guangqing Zhang, Merrick R. Mahoney, Kim Hockings Jan 2016

Effect Of Mineral Matter On The Reactivity Of Coke And Its Replication In A Coke Analogue, Raymond Longbottom, Brian J. Monaghan, Azrin A. Chowdhury, Mark H. Reid, Guangqing Zhang, Merrick R. Mahoney, Kim Hockings

Faculty of Engineering and Information Sciences - Papers: Part A

The reactivity of coke analogues doped with minerals to mimic the mineralogy of specific industrial cokes was compared with the reactivity of the industrial cokes. The reactivity was assessed in a pseudo-CRI type test. This involved reacting the carbonaceous materials (analogue and industrial coke) in CO2 at 1 100°C in a thermos-gravimetric system. In this comparison, the mineral matter added to the coke analogue was prepared from ashing of the industrial cokes. A distinct ranking of reactivity for the industrial cokes was determined to be coke A < coke B < coke C. The high reactivity of coke C was attributed to the high iron content in its ash. The higher reactivity of coke B over coke A was attributed to its higher porosity and lower rank (of the original coal carbon type) of the industrial cokes. The coke analogue replicated the increased reactivity of coke C over cokes A and B, indicating that the coke analogue is able to some extent to replicate the effect of coke mineralogy on coke reactivity in CO2. The use of the coke analogue allowed assessment of the difference in the reactivities of cokes A and B. When porosity and carbon type were fixed by use of the analogue, the reactivities of the analogues of cokes A and B were found to be similar.


Comprehensive Performance Analysis Of Fully Cooperative Communication In Wbans, Le Chung Tran, Alfred Mertins, Xiaojing Huang, Farzad Safaei Jan 2016

Comprehensive Performance Analysis Of Fully Cooperative Communication In Wbans, Le Chung Tran, Alfred Mertins, Xiaojing Huang, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part A

While relay-based cooperative networks (widely known in the literature as cooperative communication), where relays only forward signals from the sources to the destination, have been extensively researched, fully cooperative systems have not been thoroughly examined. Unlike relay networks, in a fully cooperative network, each node acts as both a source node sending its own data and a relay forwarding its partner's data to the destination. Mutual cooperation between neighboring nodes is believed to improve the overall system error performance, especially when space-time codes are incorporated. However, a comprehensive performance analysis of space-time-coded fully cooperative communication from all three perspectives ...


Video Enhanced Multiple Choice Questions - Personalising Elearning, Nadine Adams, Anne L. Porter Jan 2016

Video Enhanced Multiple Choice Questions - Personalising Elearning, Nadine Adams, Anne L. Porter

Faculty of Engineering and Information Sciences - Papers: Part A

Instructional videos have been successfully used to teach mathematical concepts to distance students. These videos allow the students to see and hear their lecturer with an added advantage of being able to stop and rewind or replay until the concept is understood. While videos facilitate student understanding, formative assessment provides both lecturer and student with an indication of the latter's mastery of a mathematical concept. Formative assessment with handwritten feedback is viewed as preferential because changing university culture means few academics have the time to provide comprehensive handwritten feedback to large numbers of students for every concept. Further, for ...


Performance Analysis Of A Magnetorheological Damper With Energy Harvesting Ability, Guoliang Hu, Yun Lu, Shuaishuai Sun, Weihua Li Jan 2016

Performance Analysis Of A Magnetorheological Damper With Energy Harvesting Ability, Guoliang Hu, Yun Lu, Shuaishuai Sun, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

A magnetorheological (MR) damper with energy harvesting ability was proposed based on electromagnetic induction (EMI) principle. The energy harvesting part was composed of a permanent magnet array and inducing coils which move vertically. This device could act as a linear power generator when the external excitation was applied, and the kinetic energy could be converted into electrical energy due to the relative linear motion between the magnets array and the inducing coils. Finite element models of both the MR damper part and the linear power generator part were built up separately to address the magnetic flux distributions, the magnetic flux ...


Visualisation For Large-Scale Gaussian Updates, Jonathon Rougier, Andrew Zammit-Mangion Jan 2016

Visualisation For Large-Scale Gaussian Updates, Jonathon Rougier, Andrew Zammit-Mangion

Faculty of Engineering and Information Sciences - Papers: Part A

In geostatistics and also in other applications in science and engineering, it is now common to perform updates on Gaussian process models with many thousands or even millions of components. These large-scale inferences involve modelling, representational and computational challenges. We describe a visualization tool for large-scale Gaussian updates, the 'medal plot'. The medal plot shows the updated uncertainty at each observation location and also summarizes the sharing of information across observations, as a proxy for the sharing of information across the state vector (or latent process). As such, it reflects characteristics of both the observations and the statistical model.We ...


Kinematical Limit Analysis For A Slope Reinforced With One Row Of Stabilizing Piles, Shiguo Xiao, Hong He, Jinxiu Zeng Jan 2016

Kinematical Limit Analysis For A Slope Reinforced With One Row Of Stabilizing Piles, Shiguo Xiao, Hong He, Jinxiu Zeng

Faculty of Engineering and Information Sciences - Papers: Part A

Stabilizing piles are commonly used to improve slope stability. The load that a pile should sustain and the associated slip surface under a prescribed factor of safety are two critical design parameters in practice. Based on the kinematically admissible failure mechanism, a limit analysis approach is introduced, which considers two potential slip surfaces that individually lie in the upslope and downslope of the piles. The explicit formulas for the upslope thrust force and downslope resistance on a pile are derived, which enables the calculation of the maximum load on a pile and the corresponding critical slip surfaces using a computer ...


Evaluation Methodology And Implementation For Natural Ventilation Control Strategies, Massimo Fiorentini, Georgios Kokogiannakis, Warwick Jackson, Zhenjun Ma, Paul Cooper Jan 2016

Evaluation Methodology And Implementation For Natural Ventilation Control Strategies, Massimo Fiorentini, Georgios Kokogiannakis, Warwick Jackson, Zhenjun Ma, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

This paper describes a methodology for evaluating the effectiveness of various control strategies for the operation of window actuators to control the indoor climate, and their implementation in a full scale case study building. In this study, the effectiveness of a control strategy is considered in terms of the capability of the controller for maintaining the indoor thermal comfort in a prescribed variable range, and its effect on the minimisation of the operational energy consumption of the building, due to a lower thermal energy demand to be met by the heating and cooling system. A model of the case study ...


Building A Microsimulation Model Of Heroin Use Careers In Australia, Alison Ritter, Nagesh Shukla, Marian D. Shanahan, Van Hoang Phuong, Vu Lam Cao, Pascal Perez, Michael P. Farrell Jan 2016

Building A Microsimulation Model Of Heroin Use Careers In Australia, Alison Ritter, Nagesh Shukla, Marian D. Shanahan, Van Hoang Phuong, Vu Lam Cao, Pascal Perez, Michael P. Farrell

Faculty of Engineering and Information Sciences - Papers: Part A

Illicit heroin use is a worldwide problem, with significant health and social costs. Treatment is known to be effective in changing heroin use habits, but it often needs to be provided over a lifetime, with people cycling in and out of treatment. It is therefore important to capture a long-term perspective on heroin use careers. The aim of this project was to build a lifetime microsimulation model of heroin using careers. This paper describes the conceptual logic of the model, the input parameters and the verification and validation results. A microsimulation model was chosen as the most appropriate simulation platform ...


Interaction Prediction Between Groundwater And Quarry Extension Using Discrete Choice Models And Artificial Neural Networks, Johan Barthelemy, Timoteo Carletti, Louise Collier, Vincent Hallet, Marie Moriame, Annick Sartenear Jan 2016

Interaction Prediction Between Groundwater And Quarry Extension Using Discrete Choice Models And Artificial Neural Networks, Johan Barthelemy, Timoteo Carletti, Louise Collier, Vincent Hallet, Marie Moriame, Annick Sartenear

Faculty of Engineering and Information Sciences - Papers: Part A

Groundwater and rock are intensively exploited in the world. When a quarry is deepened the water table of the exploited geological formation might be reached. A dewatering system is therefore installed so that the quarry activities can continue, possibly impacting the nearby water catchments. In order to recommend an adequate feasibility study before deepening a quarry, we propose two interaction indices between extractive activity and groundwater resources based on hazard and vulnerability parameters used in the assessment of natural hazards. The levels of each index (low, medium, high, very high) correspond to the potential impact of the quarry on the ...


Residual Stress Study Of Al/Al Laminates Processed By Accumulative Roll Bonding, Lihong Su, Cheng Lu, Hui Jun Li, Vladimir Luzin, Hui Wang, Anh Kiet Tieu Jan 2016

Residual Stress Study Of Al/Al Laminates Processed By Accumulative Roll Bonding, Lihong Su, Cheng Lu, Hui Jun Li, Vladimir Luzin, Hui Wang, Anh Kiet Tieu

Faculty of Engineering and Information Sciences - Papers: Part A

In this work accumulative roll bonding (ARB) was used to combine AA1050 and AA6061 sheets to produce AA1050/AA1050, AA6061/AA6061 and AA1050/AA6061 laminates with ultrafine grained (UFG) structure. Two sheets of starting materials were roll bonded with 200 °C preheating for 180 s before rolling. The through-thickness residual stress distribution of these laminates processed up to two cycles of ARB was determined by neutron diffraction with spatial resolution of 0.2 mm through 1.5 mm thickness. The measurements also required high accuracy of only few MPa since residual stresses in the laminates peaked at only about 15 ...


Indoor Scene Reconstruction For Through-The-Wall Radar Imaging Using Low-Rank And Sparsity Constraints, Van H. Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive Jan 2016

Indoor Scene Reconstruction For Through-The-Wall Radar Imaging Using Low-Rank And Sparsity Constraints, Van H. Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive

Faculty of Engineering and Information Sciences - Papers: Part A

This paper addresses the problem of indoor scene reconstruction in compressed sensing through-the-wall radar imaging. The proposed method is motivated by two observations that wall reflections reside in a low-rank subspace and the imaged scene tends to be sparse. The task of mitigating the wall reflections and reconstructing an image of the scene behind-the-wall is cast as a joint low-rank and sparsity constrained optimization problem, where a low-rank matrix captures the wall returns and a sparse matrix represents the formed image. An iterative algorithm is developed to estimate the low-rank matrix and the sparse scene vector from a reduced measurement ...


Lubrication Characterisation Analysis Of Stainless Steel Foil During Micro Rolling, Haibo Xie, Kenichi Manabe, Tsuyoshi Furushima, Kazuo Tada, Zhengyi Jiang Jan 2016

Lubrication Characterisation Analysis Of Stainless Steel Foil During Micro Rolling, Haibo Xie, Kenichi Manabe, Tsuyoshi Furushima, Kazuo Tada, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part A

Physical parameters, such as microscopic and roughness, play important roles in microforming process due to an increasing ratio of surface to volume of the deformed material. The study on lubrication characterisation in microforming is getting more attractive to researchers because traditional models are not reliable in this scaled down process. In this study, the micro rolling deformation characterisation has been investigated on SUS 304 stainless steel considering lubricant effect and feature size effect. The foil thickness plays an important role in the tribological features of micro rolling. The evolutions of both oil film thickness and foil surface are analysed accordingly ...


The Impact Of Social Media Policy And Use On Value Creation: A Survey Research, Uuf Brajawidagda, Akemi T. Chatfield Jan 2016

The Impact Of Social Media Policy And Use On Value Creation: A Survey Research, Uuf Brajawidagda, Akemi T. Chatfield

Faculty of Engineering and Information Sciences - Papers: Part A

Organizations need to provide effective policies in aligning their social media use with organizational goals to realize the expected benefits of social media. However, while social media use has been studied, social media policy research is lacking. This study aims to examine impacts of social media policy and active use on value creation. Drawing on the Model of IT/Business Value, we assessed the interplay between social media policy and social media use on value creation in a survey research conducted with Indonesia's disaster management agencies. Our analysis results of 124 survey responses show that social media use and ...


Seismic Rehabilitation Of Reinforced Concrete Beam-Column Joints By Bonding With Concrete Covers And Wrapping With Frp Composites, Muhammad N. S Hadi, Tung M. Tran Jan 2016

Seismic Rehabilitation Of Reinforced Concrete Beam-Column Joints By Bonding With Concrete Covers And Wrapping With Frp Composites, Muhammad N. S Hadi, Tung M. Tran

Faculty of Engineering and Information Sciences - Papers: Part A

This study evaluates the effectiveness of a new method for seismic strengthening of exterior RC beam-column connections and develops a joint shear strength model for the strengthened connections. Four RC exterior connections without transverse reinforcement at the joints were cast and tested under reverse cyclic loading. The first connection was tested as the control specimen while the three remaining connections were glued with concrete covers around the columns at the joint area to modify them from square to circular sections and then they were wrapped with different ratios of CFRP for strengthening. The joint shear strength model was developed based ...


Comparing Nonparametric Tests Of Equality Of Means For Randomized Block Designs, Donald J. Best, J. C. W Rayner, Olivier Thas, Jan De Neve, David Allingham Jan 2016

Comparing Nonparametric Tests Of Equality Of Means For Randomized Block Designs, Donald J. Best, J. C. W Rayner, Olivier Thas, Jan De Neve, David Allingham

Faculty of Engineering and Information Sciences - Papers: Part A

A number of nonparametric tests are compared empirically for a randomized block layout. We assess tests appropriate for when the data are not consistent with normality or when outliers invalidate traditional ANOVA tests. The objective is to assess, within this setting, tests that use ranks within blocks, the rank transform procedure that ranks the complete sample and continuous analogues of the Cochran-Mantel-Haenszel tests. The usual linear model is assumed, and our primary foci are tests of equality of means and component tests that assess linear and quadratic trends in the means. These tests include the traditional Page and Friedman tests ...


High-Throughput, Sheathless, Magnetophoretic Separation Of Magnetic And Non-Magnetic Particles With A Groove-Based Channel, Sheng Yan, Jie Zhang, Dan Yuan, Qianbin Zhao, J Ma, Weihua Li Jan 2016

High-Throughput, Sheathless, Magnetophoretic Separation Of Magnetic And Non-Magnetic Particles With A Groove-Based Channel, Sheng Yan, Jie Zhang, Dan Yuan, Qianbin Zhao, J Ma, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

The separation of target objects conjugated with magnetic particles is a significant application in biomedicine and clinical diagnosis. Conventional magnetophoresis-based devices use a sheath flow to pre-focus the particles into a single stream and typically operate at a low flow rate. We demonstrate in this work a high-throughput, sheathless, magnetophoretic separation of magnetic and non-magnetic beads in a groove-based channel, and also report on an interesting phenomenon where the same magnetic beads in the same microchannel, but with different setups, has a different particle tracing; a binary mixture of magnetic and non-magnetic beads in a diluted ferrofluid, is then fed ...


Finite Element Method Analysis Of Surface Roughness Transfer In Micro Flexible Rolling, Feijun Qu, Haibo Xie, Zhengyi Jiang Jan 2016

Finite Element Method Analysis Of Surface Roughness Transfer In Micro Flexible Rolling, Feijun Qu, Haibo Xie, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part A

Micro flexible rolling aims to fabricate submillimeter thick strips with varying thickness profile, where the surface quality of products is mainly determined by initial workpiece surface roughness and subsequent surface asperity flattening process, which is affected by process parameters during rolling. This paper shows a 3D finite element model for flexible rolling of a 250 μm thick workpiece with reduction of 20 to 50%, and rolling phase with thinner thickness indicates a better ability to decrease the surface roughness. Four types of initial workpiece surface roughness are studied in the simulation, and the influences of process parameters, such as friction ...


Hot Enough For You? A Spatial Exploratory And Inferential Analysis Of North American Climate-Change Projections, Noel A. Cressie, Emily L. Kang Jan 2016

Hot Enough For You? A Spatial Exploratory And Inferential Analysis Of North American Climate-Change Projections, Noel A. Cressie, Emily L. Kang

Faculty of Engineering and Information Sciences - Papers: Part A

Climate models have become the primary tools for scientists to project climate-change into the future and to understand its potential impact. Continental-scale General Circulation Models (GCMs) oversimplify the regional climate processes and geophysical features such as topography and land cover. The consequences of local/regional climate change are particularly relevant to natural resource management and environmental-policy decisions, for which Regional Climate Models (RCMs) have been developed. RCMs simulate, for example, three-hourly "weather" over long time periods, from which long-run averages (e.g., over 30 years) are commonly computed to estimate a region's future climate. With anthropogenic forcings incorporated, RCMs ...


Effect Of Different Frp Wrapping Arrangements On The Confinement Mechanism, Thong M. Pham, Jim Youssed, Muhammad N. S Hadi, Tung M. Tran Jan 2016

Effect Of Different Frp Wrapping Arrangements On The Confinement Mechanism, Thong M. Pham, Jim Youssed, Muhammad N. S Hadi, Tung M. Tran

Faculty of Engineering and Information Sciences - Papers: Part A

This study aims to investigate the structural behavior and failure modes of fiber-reinforced-polymer (FRP) confined concrete wrapped with different FRP arrangements. A total of twenty four specimens were cast and tested, with three of these specimens acting as reference specimens and the remaining specimens wrapped with different types of FRP (CFRP and GFRP) by different wrapping arrangements. They include fully wrapped, partially wrapped and non-uniformly wrapped concrete cylinders. The nonuniformly wrapped concrete cylinders provided higher compressive strengths and strain for FRP-confined concrete, in comparison with conventional fully wrapping arrangements. The effect of confinement level on the effectiveness of FRP confinement ...


Stress-Dilatancy Behaviour Of Compacted Coalwash As A Landfill Option, Ana Heitor, Chazath Kaliboullah, Buddhima Indraratna, Cholachat Rujikiatkamjorn Jan 2016

Stress-Dilatancy Behaviour Of Compacted Coalwash As A Landfill Option, Ana Heitor, Chazath Kaliboullah, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part A

Coalwash (CW) is granular waste by-product that results from the operation of the local coal mining industry. The reuse and recycling of this material in earthwork construction project as landfill option, is attractive from both economic and environmental perspectives. This paper presents an experimental study on compacted CW material prepared at different relative compaction levels. First the basic materials index properties are described and the stress-dilatancy behaviour is examined through a series of drained triaxial compression tests. The experimental data suggests that the different relative compaction levels exhibit different stress strain behaviour but show some degree of similarity in terms ...


Student Rules: Exploring Patterns Of Students' Computer-Efficacy And Engagement With Digital Technologies In Learning, Sarah Katherine Howard, Jun Ma, Jie Yang Jan 2016

Student Rules: Exploring Patterns Of Students' Computer-Efficacy And Engagement With Digital Technologies In Learning, Sarah Katherine Howard, Jun Ma, Jie Yang

Faculty of Engineering and Information Sciences - Papers: Part A

Teachers' beliefs about students' engagement in and knowledge of digital technologies will affect technologically integrated learning designs. Over the past few decades, teachers have tended to feel that students were confident and engaged users of digital technologies, but there is a growing body of research challenging this assumption. Given this disparity, it is necessary to examine students' confidence and engagement using digital technologies to understand how differences may affect experiences in technologically integrated learning. However, the complexity of teaching and learning can make it difficult to isolate and study multiple factors and their effects. This paper proposes the use of ...


Response Of Static And Cyclic Laterally Loaded Rigid Piles In Sand, Hongyu Qin, Wei Dong Guo Jan 2016

Response Of Static And Cyclic Laterally Loaded Rigid Piles In Sand, Hongyu Qin, Wei Dong Guo

Faculty of Engineering and Information Sciences - Papers: Part A

An experimental investigation was made into response of piles in sand subjected to lateral cyclic loading. Seven instrumented model piles were tested individually. Five tests were conducted under typical magnitude, and number of cycle loading, and two were under static loading. The results were used to deduce modulus of subgrade reaction k and the profile of limiting lateral resistance force per unit length (LFP, pu profile) in light of closed-form solutions. The study demonstrates a large impact of lateral (cyclic) load level than on the number of cycles, a 1.5-2.8 times increase in the modulus k, and a ...


Development Of A Novel Multi-Layer Mre Isolator For Suppression Of Building Vibrations Under Seismic Events, Jian Yang, Shuaishuai Sun, Tongfei Tian, Weihua Li, Haiping Du, Gursel Alici, Masami Nakano Jan 2016

Development Of A Novel Multi-Layer Mre Isolator For Suppression Of Building Vibrations Under Seismic Events, Jian Yang, Shuaishuai Sun, Tongfei Tian, Weihua Li, Haiping Du, Gursel Alici, Masami Nakano

Faculty of Engineering and Information Sciences - Papers: Part A

Protecting civil engineering structures from uncontrollable events such as earthquakes while maintaining their structural integrity and serviceability is very important; this paper describes the performance of a stiffness softening magnetorheological elastomer (MRE) isolator in a scaled three storey building. In order to construct a closed-loop system, a scaled three storey building was designed and built according to the scaling laws, and then four MRE isolator prototypes were fabricated and utilised to isolate the building from the motion induced by a scaled El Centro earthquake. Fuzzy logic was used to output the current signals to the isolators, based on the real-time ...