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Articles 31 - 60 of 769
Full-Text Articles in Engineering
Enhanced Sodium-Ion Battery Performance By Structural Phase Transition From Two-Dimensional Hexagonal-Sns2 To Orthorhombic-Sns, Tengfei Zhou, Wei Kong Pang, Chaofeng Zhang, Jianping Yang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Enhanced Sodium-Ion Battery Performance By Structural Phase Transition From Two-Dimensional Hexagonal-Sns2 To Orthorhombic-Sns, Tengfei Zhou, Wei Kong Pang, Chaofeng Zhang, Jianping Yang, Zhixin Chen, Hua-Kun Liu, Zaiping Guo
Australian Institute for Innovative Materials - Papers
Structural phase transitions can be used to alter the properties of a material without adding any additional elements and are therefore of significant technological value. It was found that the hexagonal-SnS2 phase can be transformed into the orthorhombic-SnS phase after an annealing step in an argon atmosphere, and the thus transformed SnS shows enhanced sodium-ion storage performance over that of the SnS2, which is attributed to its structural advantages. Here, we provide the first report on a SnS@graphene architecture for application as a sodium-ion battery anode, which is built from two-dimensional SnS and graphene nanosheets as complementary building blocks. The …
Graphene Oxide Dispersions: Tuning Rheology To Enable Fabrication, Sina Naficy, Rouhollah Jalili, Seyed Hamed Aboutalebi, Robert A. Gorkin Iii, Konstantin Konstantinov, Peter C. Innis, Geoffrey M. Spinks, Philippe Poulin, Gordon G. Wallace
Graphene Oxide Dispersions: Tuning Rheology To Enable Fabrication, Sina Naficy, Rouhollah Jalili, Seyed Hamed Aboutalebi, Robert A. Gorkin Iii, Konstantin Konstantinov, Peter C. Innis, Geoffrey M. Spinks, Philippe Poulin, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Here, we show that graphene oxide (GO) dispersions exhibit unique viscoelastic properties, making them a new class of soft materials. The fundamental insights accrued here provide the basis for the development of fabrication protocols for these two-dimensional soft materials, in a diverse array of processing techniques.
Bioactive Coatings For Orthopaedic Implants-Recent Trends In Development Of Implant Coatings, Bill G. X Zhang, Damian E. Myers, Gordon G. Wallace, Milan Brandt, Peter F. M Choong
Bioactive Coatings For Orthopaedic Implants-Recent Trends In Development Of Implant Coatings, Bill G. X Zhang, Damian E. Myers, Gordon G. Wallace, Milan Brandt, Peter F. M Choong
Australian Institute for Innovative Materials - Papers
Joint replacement is a major orthopaedic procedure used to treat joint osteoarthritis. Aseptic loosening and infection are the two most significant causes of prosthetic implant failure. The ideal implant should be able to promote osteointegration, deter bacterial adhesion and minimize prosthetic infection. Recent developments in material science and cell biology have seen the development of new orthopaedic implant coatings to address these issues. Coatings consisting of bioceramics, extracellular matrix proteins, biological peptides or growth factors impart bioactivity and biocompatibility to the metallic surface of conventional orthopaedic prosthesis that promote bone ingrowth and differentiation of stem cells into osteoblasts leading to …
Thermoelectric Performance Of N-Type (Pbte)0.75(Pbs)0.15(Pbse)0.1 Composites, Sima Aminorroaya Yamini, Heng Wang, Dianta Ginting, David R. G Mitchell, S X. Dou, G. Jeffrey Snyder
Thermoelectric Performance Of N-Type (Pbte)0.75(Pbs)0.15(Pbse)0.1 Composites, Sima Aminorroaya Yamini, Heng Wang, Dianta Ginting, David R. G Mitchell, S X. Dou, G. Jeffrey Snyder
Australian Institute for Innovative Materials - Papers
Lead chalcogenides (PbQ, Q = Te, Se, S) have proved to possess high thermoelectric efficiency for both n-type and p-type compounds. Recent success in tuning of electronic band structure, including manipulating the band gap, multiple bands, or introducing resonant states, has led to a significant improvement in the thermoelectric performance of p-type lead chalcogenides compared to the n-type ones. Here, the n-type quaternary composites of (PbTe)0.75(PbS)0.15(PbSe)0.1 are studied to evaluate the effects of nanostructuring on lattice thermal conductivity, carrier mobility, and effective mass variation. The results are compared with the similar ternary systems of (PbTe)1-x(PbSe)x, (PbSe) 1-x(PbS)x, and (PbS)1-x(PbTe)x. The …
Photocatalytic Degradation Of Methyl Orange By Ceo2 And Fe-Doped Ceo2 Films Under Visible Light Irradiation, D Channei, B Inceesungvorn, N Wetchakun, S Ukritnukun, Andrew Nattestad, Jun Chen, S Phanichphant
Photocatalytic Degradation Of Methyl Orange By Ceo2 And Fe-Doped Ceo2 Films Under Visible Light Irradiation, D Channei, B Inceesungvorn, N Wetchakun, S Ukritnukun, Andrew Nattestad, Jun Chen, S Phanichphant
Australian Institute for Innovative Materials - Papers
Undoped CeO2 and 0.50-5.00 mol% Fe-doped CeO2 nanoparticles were prepared by a homogeneous precipitation combined with homogeneous/impreganation method, and applied as photocatalyst films prepared by a doctor blade technique. The superior photocatalytic performances of the Fe-doped CeO2 films, compared with undoped CeO2 films, was ascribed mainly to a decrease in band gap energy and an increase in specific surface area of the material. The presence of Fe3+ as found from XPS analysis, may act as electron acceptor and/or hole donor, facilitating longer lived charge carrier separation in Fe-doped CeO2 films as confirmed by photoluminescence spectroscopy. The 1.50 mol% Fe-doped CeO2 …
Porous Ni0.5zn0.5fe2o4 Nanospheres: Synthesis, Characterization, And Application For Lithium Storage, Min Zhang, Xuanwen Gao, Zhenfa Zi, Jianming Dai, Jiazhao Wang, Shulei Chou, Changhao Liang, Xuebin Zhu, Yuping Sun, Hua-Kun Liu
Porous Ni0.5zn0.5fe2o4 Nanospheres: Synthesis, Characterization, And Application For Lithium Storage, Min Zhang, Xuanwen Gao, Zhenfa Zi, Jianming Dai, Jiazhao Wang, Shulei Chou, Changhao Liang, Xuebin Zhu, Yuping Sun, Hua-Kun Liu
Australian Institute for Innovative Materials - Papers
Monodisperse porous Ni0.5Zn0.5Fe2O4 nanospheres have been successfully synthesized by the solvothermal method. The diameter of the nanospheres can be tuned by controlling the reactant concentration. Lower reactant concentration is favoured for the synthesis of mesoporous Ni0.5Zn0.5Fe2O4 nanospheres with higher surface area. The electrochemical results show that mesoporous Ni0.5Zn0.5Fe2O4 nanospheres exhibit high reversible specific capacity (1110 mAh g-1) for Li storage and high capacity retention, with 700 mAh g-1 retained up to 50 cycles. The excellent electrochemical properties could be attributed to the large surface area and mesoporous structure. The results suggest that Ni0.5Zn0.5Fe2O4 could be a promising high capacity anode …
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Enhanced Electrochemical Properties Of Cobalt Doped Manganese Dioxide Nanowires, Byoung Chul Kim, C Justin Raj, W J. Cho, W G. Lee, Hyeon Taek Jeong, K H. Yu
Australian Institute for Innovative Materials - Papers
The various molar concentrations of cobalt doped manganese dioxide (Co-MnO2) nanostructures were synthesized by an hydrothermal technique for electrochemical supercapacitor application. The X-ray diffraction analysis showed that the samples were composed of multiphase of MnO2 with dominant reflections of γ-MnO2 structure of crystallization. The morphological studies displayed the existence of MnO 2 nanowires with the width of 10-20 nm and showing a good degree of crystallization. The electrochemical characterization was performed using cyclic voltammetry, galvanostatic charge/discharge test and impedance spectroscopy in 1 M Na2SO4 aqueous electrolyte. All the samples exhibit a typical ideal capacitive behavior with an increasing order of …
Geosocial Intelligence, Tomas Holderness
Geosocial Intelligence, Tomas Holderness
SMART Infrastructure Facility - Papers
Social media, driven by the explosive uptake of mobile computing, has caused a systematic shift in the structure of personal communications at a global scale [1, 2]. People around the world can now voice opinions, report on events, and connect with others, with an ease which was unthinkable in the preinternet age. From the Arab Spring to the Occupy Movement it is apparent that social media is becoming an integrated part of our infrastructure. Critically, much of this information is underpinned by geographical content such as mobile device GPS coordinates, which enable the user to tie their media to a …
Generating A Dynamic Synthetic Population - Using An Age-Structured Two-Sex Model For Household Dynamics, Mohammad-Reza Namazi-Rad, Payam Mokhtarian, Pascal Perez
Generating A Dynamic Synthetic Population - Using An Age-Structured Two-Sex Model For Household Dynamics, Mohammad-Reza Namazi-Rad, Payam Mokhtarian, Pascal Perez
SMART Infrastructure Facility - Papers
Generating a reliable computer-simulated synthetic population is necessary for knowledge processing and decision-making analysis in agent-based systems in order to measure, interpret and describe each target area and the human activity patterns within it. In this paper, both synthetic reconstruction (SR) and combinatorial optimisation (CO) techniques are discussed for generating a reliable synthetic population for a certain geographic region (in Australia) using aggregated- and disaggregated-level information available for such an area. A CO algorithm using the quadratic function of population estimators is presented in this paper in order to generate a synthetic population while considering a two-fold nested structure for …
Postnatural Urbanism In Jakarta: Geosocial Intelligence And The Future Of Urban Resilience, Etienne Turpin, Tomas Holderness, Rohan Wickramasuriya, Sara Dean
Postnatural Urbanism In Jakarta: Geosocial Intelligence And The Future Of Urban Resilience, Etienne Turpin, Tomas Holderness, Rohan Wickramasuriya, Sara Dean
SMART Infrastructure Facility - Papers
As cities evolve to become increasingly complex systems of people and interconnected infrastructure, the impacts of both extreme and long-term environmental change are significantly heightened. Understanding the resilience of urban systems and communities in an integrated manner is key to ensure the future sustainability of cities, which face considerable climatic, economic, and sociodemographic challenges in the 21st century. As Southeast Asia's most populous and most dense metropolitan conurbation, and the second largest urban footprint in the world, Jakarta's residents are exposed to rapid transformations of urban structures and systems.
Network Modelling For Road-Based Fecal Sludge Management, Ruth Kennedy-Walker, Tomas Holderness, David Alderson, Barbara Evans, Stuart Barr
Network Modelling For Road-Based Fecal Sludge Management, Ruth Kennedy-Walker, Tomas Holderness, David Alderson, Barbara Evans, Stuart Barr
SMART Infrastructure Facility - Papers
Improvements in the collection and treatment of sewage are critical to reduce health and environmental hazards in rapidly urbanising informal settlements. Where sewerage infrastructure is not available, road-based faecal sludge management options are often the only alternative. However, the costs of faecal sludge transportation are often a barrier to its implementation and operation and thus it is desirable to optimise travel time from source to treatment to reduce costs. This paper presents a novel technique, employing spatial network analysis, to optimise the spatiotopological configuration of a road-based faecal sludge transportation network on the basis of travel time. Using crowd-sourced spatial …
Infrastructure Planning Through Geosocial Intelligence: Using Twitter As A Platform For Rapid Assessment And Civic Co-Management During Flooding In Jakarta, Tomas Holderness, Katina Michael, Etienne Turpin
Infrastructure Planning Through Geosocial Intelligence: Using Twitter As A Platform For Rapid Assessment And Civic Co-Management During Flooding In Jakarta, Tomas Holderness, Katina Michael, Etienne Turpin
SMART Infrastructure Facility - Papers
The ability to collect data using sensor-based technologies is increasing within a public technical means. As governments in rapidly-urbanising developing nations seek to address the climatic, social and economic challenges of the 21st century, there is a progressive requirement to map and articulate civil infrastructure. When a local government needs to proactively react to impending and disruptive phenomena they increasingly look to data and technology to help them manage and respond accordingly. Mobile social media, in a citizens-as-sensors paradigm, offers the potential to collect data with which to advance our capacity to understand and promote resilience of cities to both …
Identity-Based Secure Distributed Data Storage Schemes, Jinguang Han, Willy Susilo, Yi Mu
Identity-Based Secure Distributed Data Storage Schemes, Jinguang Han, Willy Susilo, Yi Mu
Faculty of Engineering and Information Sciences - Papers: Part A
Secure distributed data storage can shift the burden of maintaining a large number of files from the owner to proxy servers. Proxy servers can convert encrypted files for the owner to encrypted files for the receiver without the necessity of knowing the content of the original files. In practice, the original files will be removed by the owner for the sake of space efficiency. Hence, the issues on confidentiality and integrity of the outsourced data must be addressed carefully. In this paper, we propose two identity-based secure distributed data storage (IBSDDS) schemes. Our schemes can capture the following properties: (1) …
Advances In The Growth And Characterization Of Relaxor-Pt-Based Ferroelectric Single Crystals, Jun Luo, Shujun Zhang
Advances In The Growth And Characterization Of Relaxor-Pt-Based Ferroelectric Single Crystals, Jun Luo, Shujun Zhang
Australian Institute for Innovative Materials - Papers
Compared to Pb(Zr 1-x Ti x )O 3 (PZT) polycrystalline ceramics, relaxor-PT single crystals offer significantly improved performance with extremely high electromechanical coupling and piezoelectric coefficients, making them promising materials for piezoelectric transducers, sensors and actuators. The recent advances in crystal growth and characterization of relaxor-PT-based ferroelectric single crystals are reviewed in this paper with emphases on the following topics: (1) the large crystal growth of binary and ternary relaxor-PT-based ferroelectric crystals for commercialization; (2) the composition segregation in the crystals grown from such a solid-solution system and possible solutions to reduce it; (3) the crystal growth from new binary …
Giant Electrocaloric Effect In Bazr0.2ti0.8o3 Thick Film, Hui-Jian Ye, Xiaoshi Qian, Dae Yong Jeong, Shujun Zhang, Yue Zhou, Wen-Zhu Shao, Liang Zhen, Q M. Zhang
Giant Electrocaloric Effect In Bazr0.2ti0.8o3 Thick Film, Hui-Jian Ye, Xiaoshi Qian, Dae Yong Jeong, Shujun Zhang, Yue Zhou, Wen-Zhu Shao, Liang Zhen, Q M. Zhang
Australian Institute for Innovative Materials - Papers
We report the giant electrocaloric effect (ECE) of BaZr0.2Ti0.8O3 (BZT) thick film near room temperature. The BZT thick film was fabricated by the tape casting method with the thickness of 12.0 μm. Due to the near invariant critical point composition, relaxor behavior, and the stress generated between the film and the substrate, the thick film exhibits a large adiabatic temperature drop ΔT = −7 °C under 19.5 MV/m electric field, large EC coefficient ΔT/ΔE = 0.50 x 10−6 K · m · V−1, ΔS/ΔE = 0.88 x 10−6 J · m · kg−1 · K−1 · V−1 over a wide …
Fabrication And Measurement Of A Flexoelectric Micro-Pyramid Composite, Wenbin Huang, Longlong Shu, Seol Ryung Kwon, Shujun Zhang, Fuh Gwo Yuan, Xiaoning Jiang
Fabrication And Measurement Of A Flexoelectric Micro-Pyramid Composite, Wenbin Huang, Longlong Shu, Seol Ryung Kwon, Shujun Zhang, Fuh Gwo Yuan, Xiaoning Jiang
Australian Institute for Innovative Materials - Papers
A fabrication method by combining precision mechanical dicing and wet etching was developed to prepare micro-pyramid structures based on (Ba0.67Sr0.33)TiO3 ceramics. The effective piezoelectric properties of flexoelectric pyramid structures in ten micrometers scale were investigated and measured through converse flexoelectric effect. The scaling effect of the flexoelectric response was demonstrated as the structure size shrinks down. The results do suggest the great potential of flexoelectric micro pyramids as an alternative to lead-free piezoelectric material.
Converse Flexoelectric Coefficient F(1212) In Bulk Ba0.67sr0.33tio3, Longlong Shu, Wenbin Huang, Seol Ryung Kwon, Zhao Wang, Fei Li, Xiaoyong Wei, Shujun Zhang, Michael T. Lanagan, Xi Yao, Xiaoning Jiang
Converse Flexoelectric Coefficient F(1212) In Bulk Ba0.67sr0.33tio3, Longlong Shu, Wenbin Huang, Seol Ryung Kwon, Zhao Wang, Fei Li, Xiaoyong Wei, Shujun Zhang, Michael T. Lanagan, Xi Yao, Xiaoning Jiang
Australian Institute for Innovative Materials - Papers
Enhanced flexoelectricity in perovskite ceramics and single crystals has been reported before. In this letter, 3-3 ceramic-ceramic Ba0.6Sr0.4TiO3/Ni0.8Zn0.2Fe2O4 composite with a colossal permittivity was employed in the conventional pure bending experiment in order to examine the transverse flexoelectric response. The measured flexoelectric coefficient at 30 Hz is 128 μC/m and varies to 16 μC/m with the frequency increasing from 30 Hz to 120 Hz, mainly due to the inverse correlation between the permittivity and the frequency. This result reveals the permittivity dependence of flexoelectric coefficient in the frequency dispersion materials, suggesting that the giant permittivity composites can be good flexoelectric …
Intelligent Approaches To Complex Systems, P K. S Prakash, Nagesh Shukla
Intelligent Approaches To Complex Systems, P K. S Prakash, Nagesh Shukla
Faculty of Engineering and Information Sciences - Papers: Part A
Availability of large amount and variety of information and decision making problems in various complex systems ranging from transportation, supply chain, energy to logistics; have placed the need for the development & successful application of advanced intelligent approaches. It is argued that intelligent approaches such as analytics and optimisation techniques drive smarter decisions, faster actions and optimise outcomes in this era. However, there are no single best analytical or optimisation technique to deal with the challenges in various complex systems. It is due to the fact that a technique/approach may show a better performance for a given problem instance; but, …
Data Scientists As Game Changers In Big Data Environments, Akemi T. Chatfield, Vivian N. Shlemoon, Wilbur Redublado, Faizur Rahman
Data Scientists As Game Changers In Big Data Environments, Akemi T. Chatfield, Vivian N. Shlemoon, Wilbur Redublado, Faizur Rahman
Faculty of Engineering and Information Sciences - Papers: Part A
The potential power of big data to generate insights and create new forms of value in the ways which transform organizations and society has been observed by big data-driven organizations and big data experts. Despite the recent sensational declaration of a data scientist as "the sexiest job of the 21st century", however, there has been the lack of rigorous studies of what a data scientist is, and what job skill requirements this hottest job title may need. In order to address this gap, we systematically examine relevant source material to extract definitions and categorize them with a classification scheme developed …
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 …
Beyond The Game: Issues With Social Media And Sporting Events, Matthew Halliwell, Mark Freeman
Beyond The Game: Issues With Social Media And Sporting Events, Matthew Halliwell, Mark Freeman
Faculty of Engineering and Information Sciences - Papers: Part A
Society today is being transformed through the use of Social Media. While the resulting changes are typically marketed as having positive benefits on society, there is a negative side to Social Networking platform usage. This paper considers the case of Social Networking use for a perceived sports betting incident at the Super Bowl XLVIII with boxer Floyd Mayweather, to demonstrate the modified experience some users faced during the sporting event as a result of Social Media. Analysis of the broadcast of negative sentiments associated with inappropriate use and misinformation demonstrates how Social Networking allows opinions and ideas to be spread …
Whole-Genome Analysis Of Multienvironment Or Multitrait Qtl In Magic, Arunas P. Verbyla, Colin R. Cavanagh, Klara L. Verbyla
Whole-Genome Analysis Of Multienvironment Or Multitrait Qtl In Magic, Arunas P. Verbyla, Colin R. Cavanagh, Klara L. Verbyla
Faculty of Engineering and Information Sciences - Papers: Part A
Multiparent Advanced Generation Inter-Cross (MAGIC) populations are now being utilized to more accurately identify the underlying genetic basis of quantitative traits through quantitative trait loci (QTL) analyses and subsequent gene discovery. The expanded genetic diversity present in such populations and the amplified number of recombination events mean that QTL can be identified at a higher resolution. Most QTL analyses are conducted separately for each trait within a single environment. Separate analysis does not take advantage of the underlying correlation structure found in multienvironment or multitrait data. By using this information in a joint analysis-be it multienvironment or multitrait - it …
The Relationship Between The Quality Of Active Frontages And Public Perceptions Of Public Spaces, Emma Elizabeth Heffernan, Troy W. Heffernan, Wei Pan
The Relationship Between The Quality Of Active Frontages And Public Perceptions Of Public Spaces, Emma Elizabeth Heffernan, Troy W. Heffernan, Wei Pan
Faculty of Engineering and Information Sciences - Papers: Part A
Active frontages are often advocated in best practice guidance and by local planning authorities. However, little research has been carried out to establish what benefits, if any, active frontages offer. Previous research in this area has been limited to examining observed behaviour rather than analysing public perceptions. This article aims to improve the understanding of the relationship between the quality of an active frontage and public perceptions of the public space the frontage addresses. The research was carried out through a combination of a critical literature review and a questionnaire survey that engaged 152 participants. The participants' perceptions of a …
Higher Order Or Fractional Order Hardy-Sobolev Type Equations, Wenxiong Chen, Yanqin Fang
Higher Order Or Fractional Order Hardy-Sobolev Type Equations, Wenxiong Chen, Yanqin Fang
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper we consider the following higher order or fractional order Hardy-Sobolev type equation.
An Architecture Framework Modification Supporting The Acquisition Stakeholders, Farid Shirvani, Mahmoud Efatmaneshnik, Allan P. Campbell
An Architecture Framework Modification Supporting The Acquisition Stakeholders, Farid Shirvani, Mahmoud Efatmaneshnik, Allan P. Campbell
Faculty of Engineering and Information Sciences - Papers: Part A
Architectural modeling is gaining support for urban system development to help governments, local agencies and large enterprises acquire, maintain and develop complex infrastructure. This paper proposes a modification to TRAK (The Rail Architecture frameworK) to make it more suitable for acquisition of the general class of urban infrastructure systems. In this paper four of the main system stakeholders, namely acquirer, developer, investor and regulator are chosen and their concerns are identified. In order to identify the gaps, the procurement viewpoints of TRAK are investigated and analyzed to show their inefficiencies in expressing acquisition scenarios and addressing the concerns of those …
Influence Of The Nonlinear Gain On The Stability Limit Of A Semiconductor Laser With Optical Feedback, Yuanlong Fan, Yanguang Yu, Jiangtao Xi, Huiying Ye
Influence Of The Nonlinear Gain On The Stability Limit Of A Semiconductor Laser With Optical Feedback, Yuanlong Fan, Yanguang Yu, Jiangtao Xi, Huiying Ye
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the results revealing the influence of the nonlinear gain on the stability limit of a semiconductor laser (SL) with external optical feedback (EOF). A new system determinant is derived from the original Lang and Kobayashi (L-K) equations. By making analysis on the locus of the roots of the system determinant, the stability limit of the system is obtained, from which a number of important and interesting phenomenon revealed by the nonlinear gain is uncovered. The correctness of results is verified by numerical simulations.
Crowd Behavior Recognition Using Dense Trajectories, Muhammad Rizwan Khokher, Abdesselam Bouzerdoum, Son Lam Phung
Crowd Behavior Recognition Using Dense Trajectories, Muhammad Rizwan Khokher, Abdesselam Bouzerdoum, Son Lam Phung
Faculty of Engineering and Information Sciences - Papers: Part A
This article presents a new method for crowd behavior recognition, using dynamic features extracted from dense trajectories. The histogram of oriented gradient and motion boundary histogram descriptors are computed at dense points along motion trajectories, and tracked using median filtering and displacement information obtained from a dense optical flow field. Then a global representation of the scene is obtained using a bag-of-words model of the extracted features. The locality-constrained linear encoding with sum pooling and L2 plus power normalization are employed in the bag-of-words model. Finally, a support vector machine classifier is trained to recognize the crowd behavior in a …
Quality Of Experience-Based Image Feature Selection For Mobile Augmented Reality Applications, Yi Cao, Christian H. Ritz, Raad Raad
Quality Of Experience-Based Image Feature Selection For Mobile Augmented Reality Applications, Yi Cao, Christian H. Ritz, Raad Raad
Faculty of Engineering and Information Sciences - Papers: Part A
Mobile augmented reality applications rely on automatically recognising a visual scene through matching of derived image features. To ensure the Quality of Experience (QoE) perceived by users, such applications should achieve high matching accuracy meanwhile minimizing the waiting time to meet real-time requirement. An efficient solution is to develop an effective feature selection method to select the most robust features against distortions caused by camera capture to achieve high matching accuracy whilst transmission and matching process of the features are significant reduced. Feature selection is also beneficial to reducing the computational complexities of the matching system so that waiting time …
Balancing Energy In The Smart Grid Using Distributed Value Function (Dvf), Hassan Shirzeh, Fazel Naghdy, Philip Ciufo, Montserrat Ros
Balancing Energy In The Smart Grid Using Distributed Value Function (Dvf), Hassan Shirzeh, Fazel Naghdy, Philip Ciufo, Montserrat Ros
Faculty of Engineering and Information Sciences - Papers: Part A
As the penetration of renewable energy resources increases in distribution networks, so does the need to manage these resources in an effective manner. Since these resources are installed to displace carbon-based generation and to provide an income stream to the resource owner, it is important that both installation objectives (as a minimum) can be met. With all of these renewable energy resources available, the opportunity also exists to assist with the energy management of this resource-rich distribution network. However, the renewable energy resources do not produce power in a deterministic manner. The available production depends on the time of day …
Response Of The Al Σ5 〈001〉 Left {310} Symmetric Tilt Grain Boundary To The Shear Deformation Simulated By Molecular Dynamics, Kuiyu Cheng, Cheng Lu, A Kiet Tieu
Response Of The Al Σ5 〈001〉 Left {310} Symmetric Tilt Grain Boundary To The Shear Deformation Simulated By Molecular Dynamics, Kuiyu Cheng, Cheng Lu, A Kiet Tieu
Faculty of Engineering and Information Sciences - Papers: Part A
In the present study, shear response of the Al [001] symmetrical tilting Σ5 (310) grain boundary (GB) was investigated by a three dimensional bicrystal at 500~750 K. It was found that the GB gradually rotated around the [001] tilt axis during the shear deformation due to the combination of surface strain, GB sliding and GB coupled motion. These rotated grain boundaries were Σ5 asymmetrical or symmetrical tilt grain boundaries and led to the normal stress σxx in the bicrystal system. It was also found that the response of the grain boundary to the shear deformation was closely related to the …