A General Framework For Infrastructure System Reliability Modelling And Analysis,
2013
University of Wollongong
A General Framework For Infrastructure System Reliability Modelling And Analysis, Payam Mokhtarian, Mohammad-Reza Namazi-Rad, Tin Kin Ho, Mahmoud Efatmaneshnik
Faculty of Engineering and Information Sciences - Papers: Part A
An infrastructure system is inherently complex, with layers of both explicitly defined and hidden or subtle interfaces with other infrastructure systems and human users. High availability is desired, which implies stringent requirements on reliability and safety. Reliability analysis typically starts at component or sub-system level and aggregates through the system functional hierarchy. Because of the system complexity, incorporating occurrences of all possible interactions and scenarios is not always practical and failure data is often limited. Moreover, there are unobserved events among the sub-systems distributing either randomly or with temporal trend. To facilitate reliability analysis amid the complex environment and uncertain …
Dynamics Of Formation Of Anthracene Anions In Molecular Clouds And Protoplanetary Atmospheres,
2013
Instituto de Fisica Fundamental, Spain
Dynamics Of Formation Of Anthracene Anions In Molecular Clouds And Protoplanetary Atmospheres, A Garcia-Sanz, F Carelli, F Sebastianelli, F A. Gianturco, Gustavo Garcia Gomez-Tejedor
Faculty of Engineering and Information Sciences - Papers: Part A
Quantum mechanical scattering calculations are carried out for gas-phase molecules of anthracene, an aromatic system with three condensed aromatic carbon rings, in collision with low-energy electrons. They reveal the presence of various metastable (resonant) anionic states of this prototype species belonging to the larger polycondensed aromatic hydrocarbons deemed to be present in various regions of the interstellar medium. These resonances are analysed in terms of their most likely paths to stabilization into bound anionic molecules or aromatic fragments, while the important role of threshold virtual states is also discussed within the same context.
Bayesian Nonparametric Reliability Analysis For A Railway System At Component Level,
2013
University of Wollongong
Bayesian Nonparametric Reliability Analysis For A Railway System At Component Level, Payam Mokhtarian, Mohammad-Reza Namazi-Rad, Tin Kin Ho, Thomas Suesse
Faculty of Engineering and Information Sciences - Papers: Part A
Railway system is a typical large-scale complex system with interconnected sub-systems which contain numerous components. System reliability is retained through appropriate maintenance measures and cost-effective asset management requires accurate estimation of reliability at the lowest level. However, real-life reliability data at component level of a railway system is not always available in practice, let alone complete. The component lifetime distributions from the manufacturers are often obscured and complicated by the actual usage and working environments. Reliability analysis thus calls for a suitable methodology to estimate a component lifetime under the conditions of a lack of failure data and unknown and/or …
A Ciphertext-Policy Attribute-Based Proxy Re-Encryption With Chosen-Ciphertext Security,
2013
City University of Hong Kong
A Ciphertext-Policy Attribute-Based Proxy Re-Encryption With Chosen-Ciphertext Security, Kaitai Liang, Liming Fang, Willy Susilo, Duncan S. Wong
Faculty of Engineering and Information Sciences - Papers: Part A
Cipher text-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) extends the traditional Proxy Re-Encryption (PRE) by allowing a semi-trusted proxy to transform a cipher text under an access policy to the one with the same plaintext under another access policy (i.e. attribute-based re-encryption). The proxy, however, learns nothing about the underlying plaintext. CP-ABPRE has many real world applications, such as fine-grained access control in cloud storage systems and medical records sharing among different hospitals. Previous CP-ABPRE schemes leave how to be secure against Chosen-Cipher text Attacks (CCA) as an open problem. This paper, for the first time, proposes a new CP-ABPRE to tackle …
Anonymous Single Sign-On Schemes Transformed From Group Signatures,
2013
University of Wollongong
Anonymous Single Sign-On Schemes Transformed From Group Signatures, Jingquan Wang, Guilin Wang, Willy Susilo
Faculty of Engineering and Information Sciences - Papers: Part A
Single Sign-on (SSO) allows a user to obtain a single credential from a Trusted Third Party (TTP) once and then authenticates himself/herself to different service providers by using the same credential. Though different SSO schemes have been obtained from various primitives, user anonymity has not yet been studied formally. Motivated by the fact that anonymity is a very essential security requirement in certain scenarios, in this paper we first formalize a security model of anonymous single-sign on (ASSO). Subsequently, we present a generic ASSO scheme which is transformed from group signatures. Formal proofs are provided to show that the proposed …
The K-Theory Of Heegaard Quantum Lens Spaces,
2013
Uniwersytet Warszawski
The K-Theory Of Heegaard Quantum Lens Spaces, Piotr M. Hajac, Adam Rennie, Bartosz Zielinski
Faculty of Engineering and Information Sciences - Papers: Part A
Representing Z/NZ as roots of unity, we restrict a natural U(1)-action on the Heegaard quantum sphere to Z/NZ, and call the quotient spaces Heegaard quantum lens spaces. Then we use this representation of Z/NZ to construct an associated complex loine bundle. This paper proves the stable non-triviality of these line bundles over any of the quantum lens spaces we consider. We use the pullback structure of the C*-algebra of the lens space to compute its K-theory via the Mayer-Vietoris sequence, and an explicit form of the Bass connecting homomorphism to prove the stable non-triviality of the bundles. On the algebraic …
I-125 Ropes Eye Plaque Dosimetry: Validation Of A Commercial 3d Ophthalmic Brachytherapy Treatment Planning System And Independent Dose Calculation Software With Gafchromic Ebt3 Films,
2013
Prince of Wales Hospital
I-125 Ropes Eye Plaque Dosimetry: Validation Of A Commercial 3d Ophthalmic Brachytherapy Treatment Planning System And Independent Dose Calculation Software With Gafchromic Ebt3 Films, Joel Poder, Stephanie Corde
Faculty of Engineering and Information Sciences - Papers: Part A
Purpose: The purpose of this study was to measure the dose distributions for different Radiation Oncology Physics and Engineering Services, Australia (ROPES) type eye plaques loaded with I-125 (model 6711) seeds using GafChromic R EBT3 films, in order to verify the dose distributions in the Plaque SimulatorTM (PS) ophthalmic 3D treatment planning system. The brachytherapy module of RADCALC R was used to independently check the dose distributions calculated by PS. Correction factors were derived from the measured data to be used in PS to account for the effect of the stainless steel ROPES plaque backing on the 3D dose distribution. …
A Simple Adaptive Stfc Mb-Ofdm Uwb System For Wban Applications,
2013
University of Wollongong
A Simple Adaptive Stfc Mb-Ofdm Uwb System For Wban Applications, Miftadi Sudjai, Le Chung Tran, Farzad Safaei
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes a simple, but efficient, adaptive space-time-frequency coded (STFC) multiband orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) system to improve the average BER performance for body-to-external link wireless body area network (WBAN) applications. The novelty of this paper is the proposed body direction based adaptive algorithm that controls the set of modulation scheme, space-time-frequency code (STFC) coding rate, and power of signal constellations implemented in STFC MB-OFDM UWB WBAN. Simulation results show that the proposed system can provide a consistent 1-2 dB improvement in the case of 2I1O configuration, and 1-3 dB improvement in a medium-to-high SNR region …
Applying Mathematical Model To Simplify The Procession Of Pipeline Route Selection,
2013
University of Wollongong
Applying Mathematical Model To Simplify The Procession Of Pipeline Route Selection, Jianli Liu, Shuqing Yang, Joseph Wiltshire
Faculty of Engineering and Information Sciences - Papers: Part A
Now there are many pipelines to deliver liquid-like water diversions in the world. Optimal route for pipeline transportation is a major concern for engineers, economists, and decision makers. Pipeline route selection is governed by many factors such as the shortest distance between supply and demand points, constructability, affordability, environmental impacts, and approachability. There are many methods developed for the pipeline route selection like Gestalt method, land suitability mapping techniques, geographic information systems (GIS), imaging technologies for pipeline mapping with the use of airborne lidar, etc. But these methods, though robust in translating physical constraints into feasible alternatives for route location, …
Suburban Bus Route Design,
2013
University of Wollongong
Suburban Bus Route Design, Shuaian Wang, Xiaobo Qu, Zhiyuan Liu
Faculty of Engineering and Information Sciences - Papers: Part A
Rural and suburban areas have a low density of population. Hence, the bus services have unique features that enable the design of suburban bus route a practical and interesting research topic. We formulate a suburban bus route design problem and prove its NP-hardness. A dynamic programming approach is developed to obtain the optimal solution. A case study is reported to demonstrate the applicability of the proposed model and solution method.
Integrating Building Information Modelling (Bim) Into Engineering Education: An Exploratory Study Of Industry Perceptions Using Social Network Data,
2013
Griffith University
Integrating Building Information Modelling (Bim) Into Engineering Education: An Exploratory Study Of Industry Perceptions Using Social Network Data, Kriengsak Panuwatwanich, Mei Liang Wong, Jeung-Hwan Doh, Rodney A. Stewart, Timothy J. Mccarthy
Faculty of Engineering and Information Sciences - Papers: Part A
Building Information Modelling (BIM) has been widely acknowledged as an emerging technological and procedural shift within the Architecture, Engineering and Construction (AEC) industry. BIM represents a methodology to manage the building design and project data in digital format throughout a building lifecycle. With the implementation of BIM, the design, construction and operation processes can be better streamlined to improve project efficiency. Because of its far-reaching benefits, there is a current push for BIM by governments worldwide, including Australia. However, a significant lack of the understanding of BIM and industry readiness has been identified as a major hindrance; hence, there is …
The Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Storage Racks - Part Ii Design,
2013
Griffith University
The Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Storage Racks - Part Ii Design, B P. Gilbert, L H. Teh, R X. Badet, K J. R Rasmussen
Faculty of Engineering and Information Sciences - Papers: Part A
This paper analyses the influence of the horizontal restraints provided by pallets on the ultimate capacity of drive-in racks. The paper is based on the assumption that one can accurately determine the coefficient of friction between the rail beams and the pallets or can design a device that restrains the pallets from sliding on the rail beams. Thirty-six drive-in racks representing the global sale of an Australian manufacturer over three years are analysed for all possible loading scenarios. For the sake of computational efficiency, the simple 2D model introduced in the companion paper is used for the study. The load …
An Exploratory Study Of Personal Reflection And Collaboration Skills Using Online Collaborative Tool In Project-Based Learning,
2013
University of Wollongong
An Exploratory Study Of Personal Reflection And Collaboration Skills Using Online Collaborative Tool In Project-Based Learning, Sim Kim Lau, Wendy Meyers
Faculty of Engineering and Information Sciences - Papers: Part A
By deepening our understanding of the use of Web 2.0 for reflective practice, knowledge co-construction and project based learning this paper aims to contribute to our understanding of collaborative learning. The paper investigates a case study of a post-graduate system development subject to increase student learning through the development of students' personal reflection and collaboration skills. The project aims to develop key foundational knowledge and skills identified in the IS 2010 curriculum guidelines, i.e. the ability to work collaboratively. Of particular interest was the ability of student collaboration combined with personal reflective learning to lead to negotiation of meaning and …
An Outlier Robust Block Bootstrap For Small Area Estimation,
2013
University of Wollongong
An Outlier Robust Block Bootstrap For Small Area Estimation, Payam Mokhtarian, Ray Chambers
Faculty of Engineering and Information Sciences - Papers: Part A
Small area inference based on mixed models, i.e. models that contain both fixed and random effects, are the industry standard for this field, allowing between area heterogeneity to be represented by random area effects. Use of the linear mixed model is ubiquitous in this context, with maximum likelihood, or its close relative, REML, the standard method for estimating the parameters of this model. These parameter estimates, and in particular the resulting predicted values of the random area effects, are then used to construct empirical best linear unbiased predictors (EBLUPs) of the unknown small area means. It is now well known …
Energy-Aware Two Link-Disjoint Paths Routing,
2013
Curtin University
Energy-Aware Two Link-Disjoint Paths Routing, Gongqi Lin, Sieteng Soh, Mihai Lazarescu, Kwan-Wu Chin
Faculty of Engineering and Information Sciences - Papers: Part A
Network robustness and throughput can be improved by routing each source-to-terminal (s, t) demand via two link-disjoint paths (TLDP). However, the use of TLDP incurs higher energy cost. Henceforth, we address the problem of minimizing the energy usage of networks that use TLDP. Specifically, our problem is to maximally switch off redundant network links while maintaining at least 0zT100% of (s, t) TLDP in the network, for a given T, and limiting the maximum link utilization (MLU) to no greater than a configured threshold. To address this problem, we present a fast heuristic, called TLDP by Shortest Path First (TLDP-SPF), …
Stainlessness,
2013
University of Wollongong
Stainlessness, Etienne Turpin
Faculty of Engineering and Information Sciences - Papers: Part A
To accompany the book Stainlessness, published this Spring by the Journal of Aesthetics and Protest Press (Leipzig and Los Angeles), Sound & Language Distribution is pleased to announce the release of a Limited Edition set of prints. The etched plates on view in the Convenience Gallery - and the set of prints they produced - tell the story of labor movements in North America and show how they have shaped the cities of Sudbury, Chicago, Pittsburgh, and Detroit. While processes of urbanization have all but erased these struggles from our cities and left only ambivalent monuments to mark the past, …
Transition Of Ductile And Brittle Fracture During Dwtt By Fem,
2013
University of Wollongong
Transition Of Ductile And Brittle Fracture During Dwtt By Fem, Youyou Wu, Hailiang Yu, Cheng Lu, A Kiet Tieu, Ajit Godbole, Guillaume Michal
Faculty of Engineering and Information Sciences - Papers: Part A
Globally, steel pipelines are widely used to transport energy in the form of liquid petroleum and natural gas. The steel used in the manufacture of these pipelines must have high strength and toughness, and high resistance to fracture. The Drop Weight Tear Test (DWTT) is the most widely used test to assess brittle fracture characteristics in steel. The zones of ductile and brittle fracture during DWTT characterize the quality of pipeline steels. In this paper, the Gurson-Tvergaard-Needleman (GTN) fracture models are coupled in a Finite Element model. The ductile and brittle fracture zones in the samples are analyzed under different …
A Scalable Unsupervised Feature Merging Approach To Efficient Dimensionality Reduction Of High-Dimensional Visual Data,
2013
Australian National University
A Scalable Unsupervised Feature Merging Approach To Efficient Dimensionality Reduction Of High-Dimensional Visual Data, Lingqiao Liu, Lei Wang
Faculty of Engineering and Information Sciences - Papers: Part A
To achieve a good trade-off between recognition accuracy and computational efficiency, it is often needed to reduce high-dimensional visual data to medium-dimensional ones. For this task, even applying a simple full-matrix-based linear projection causes significant computation and memory use. When the number of visual data is large, how to efficiently learn such a projection could even become a problem. The recent feature merging approach offers an efficient way to reduce the dimensionality, which only requires a single scan of features to perform reduction. However, existing merging algorithms do not scale well with high-dimensional data, especially in the unsupervised case. To …
Are You Smart Enough For Your Smart Phone? A Cognitive Load Comparison,
2013
University of Wollongong
Are You Smart Enough For Your Smart Phone? A Cognitive Load Comparison, Fayez Alshehri, Mark Freeman, Alison E. Freeman
Faculty of Engineering and Information Sciences - Papers: Part A
The popularity of mobile devices, and particularly smart phones, has been driven by rapid developments in their power, capabilities and features. However, these developments create new and additional demands on users. Increased attention and more complex thought patterns are required to interact with such technology. Testing three popular smart phones, this research applies the principles of Cognitive Load Theory to evaluate the impact of varied operating systems and interaction modes on users' cognitive load. NASA Task Load Index was used to measure participants' perceptions of the cognitive load imposed by interaction with these mobile devices. While different operating systems were …
Another Atlas,
2013
University of Wollongong
Another Atlas, Etienne Turpin
Faculty of Engineering and Information Sciences - Papers: Part A
Another Atlas builds on the work of Lize Mogel and Alexis Bhagat's 2007 compendium of cartographic investigations into power, networks and social justice. The book and subsequent touring exhibition brought together work from artists, designers, geographers and activists all focusing on the role mapping has in our shared social structures. The different works lead to questions of; Who has the right to map? What do they have the right to map? How mapping changes our world. Each of the artists selected represent ways information can be gathered and how forms of mapping can be challenged.
