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Full-Text Articles in Social and Behavioral Sciences

Generic Construction Of Hybrid Public Key Traitor Tracing With Full-Public-Traceability, Duong Hieu Phan, Rei Safavi-Naini, Joseph Tonien Jan 2006

Generic Construction Of Hybrid Public Key Traitor Tracing With Full-Public-Traceability, Duong Hieu Phan, Rei Safavi-Naini, Joseph Tonien

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Quantifying The Regional Load-Bearing Ability Of Trans-Tibial Stumps, Ming Zhang, Winson Lee Jan 2006

Quantifying The Regional Load-Bearing Ability Of Trans-Tibial Stumps, Ming Zhang, Winson Lee

Faculty of Engineering and Information Sciences - Papers: Part A

This paper reports findings of experiments aiming to (1) compare the load tolerant ability over different regions of stumps of lower limb amputees, (2) study the effect of walking on the load tolerant ability, and (3) examine the distal-end weight-bearing ability supported by different interface materials. The method was to apply increasing load to the stump up to the pain level through a force transducer or a digital scale, considering the effect of regional difference, walking, and interface materials. The results show that the patellar tendon and the distal end of the fibula were the best and worst load-tolerant region ...


The Use Of Maple Platform For The Study Of Geodisc Motion On Curved Spacetimes, Dumitru N. Vulcanov, Valentina D. Wheeler Jan 2006

The Use Of Maple Platform For The Study Of Geodisc Motion On Curved Spacetimes, Dumitru N. Vulcanov, Valentina D. Wheeler

Faculty of Engineering and Information Sciences - Papers: Part A

The article illustrates the graphical study of geodesic motion on curved space-times (mainly exact solutions of Einstein equations) using the symbolic, numerical and graphical computation facilities of Maple platform. The example of null geodesics on Schwarzschild solution is completely processed. The geodesic curves are plotted directly using DEtools package in Schwarzschild coordinates.


An Efficient Single-Key Pirates Tracing Scheme Using Cover-Free Families, Joseph Tonien, Rei Safavi-Naini Jan 2006

An Efficient Single-Key Pirates Tracing Scheme Using Cover-Free Families, Joseph Tonien, Rei Safavi-Naini

Faculty of Engineering and Information Sciences - Papers: Part A

A cover-free family is a well-studied combinatorial structure that has many applications in computer science and cryptography. In this paper, we propose a new public key traitor tracing scheme based on cover-free families. The new traitor tracing scheme is similar to the Boneh-Franklin scheme except that in the Boneh-Franklin scheme, decryption keys are derived from Reed-Solomon codes while in our case they are derived from a cover-free family. This results in much simpler and faster tracing algorithms for single-key pirate decoders, compared to the tracing algorithms of Boneh-Franklin scheme that use Berlekamp- Welch algorithm. Our tracing algorithms never accuse innocent ...


On Self Matching In ⌊Nα⌋, Martin W. Bunder Jan 2006

On Self Matching In ⌊Nα⌋, Martin W. Bunder

Faculty of Engineering and Information Sciences - Papers: Part A

For an arbitrary real number with convergents p0 q0 , p1 q1 , p2 q2 , . . ., b(n+qi)c−bnc is equal to pi, and so is independent of n, except at a small specified number of values of n. For fixed n, this relation holds for all or for all except a finite number of values of i.


Gait Analysis Of Low-Cost Flexible-Shank Transtibial Prostheses, Winson Lee, Ming Zhang, Peggy Chan, David A. Boone Jan 2006

Gait Analysis Of Low-Cost Flexible-Shank Transtibial Prostheses, Winson Lee, Ming Zhang, Peggy Chan, David A. Boone

Faculty of Engineering and Information Sciences - Papers: Part A

The latest lower-limb prosthetic designs have been incorporated with dynamic elastic response (DER) components to enhance prosthesis flexibility, which are suggested to be beneficial to gait. Although DER prosthetic. feet are preferred by most transtibial amputees and their benefits to gait are supported by some biomechanical studies, many are still utilizing the simple conventional solid ankle cushioned heel (SACH) designs because of the lower cost. The monolimb, a transtibial prosthesis with the socket and the shank molded from a single piece of thermoplastic material, perhaps is an alternative to DER feet for providing flexibility at the shank. In addition to ...


Spatial Prediction For Massive Datasets, Noel A. Cressie, Gardar Johannesson Jan 2006

Spatial Prediction For Massive Datasets, Noel A. Cressie, Gardar Johannesson

Faculty of Engineering and Information Sciences - Papers: Part A

Remotely sensed spatio-temporal datasets on the order of megabytes to terrabytes are becoming more common. For example, polar-orbiting satellites observe Earth from space, monitoring the Earth's atmospheric, oceanic, and terrestrial processes, and generate massive amounts of environmental data. The current generation of satellites, such as the National Aeronautic and Space Administration's (NASA) Earth Observing System (EOS) Terra and Aqua satellites, generate about 1.5 terrabytes of data per day. In the USA, there are remote-sensing projects in preparation that will dwarf even these datasets. NASA, the National Oceanic and Atmospheric Administration (NOAA), and the Department of Defense (DoD ...


Behavior Of Transversal Crack On Slab Corner During V-H Rolling Process, Hai-Liang Yu, Xiang-Hua Liu, Chang-Sheng Li, Y Kusaba Jan 2006

Behavior Of Transversal Crack On Slab Corner During V-H Rolling Process, Hai-Liang Yu, Xiang-Hua Liu, Chang-Sheng Li, Y Kusaba

Faculty of Engineering and Information Sciences - Papers: Part A

The behavior of transversal cracks on the surface of the slab corner during vertical and horizontal (V-H) rolling process with flat vertical roll and groove vertical roll was simulated by explicit dynamic finite element method. The closure and growth of crack and the contact pressure on surfaces of the crack in contacting zone between slab and roll during rolling process were analyzed. The results showed that during vertical rolling process, when the groove vertical roll is used, the maximum contact pressure on surfaces of the crack is 115 MPa, and the closure of crack is stable; when the flat vertical ...


A Robust Design Procedure For Improvement Of Quality Of Lower-Limb Prosthesis, Nian-Zhong Chen, Winson Lee, Ming Zhang Jan 2006

A Robust Design Procedure For Improvement Of Quality Of Lower-Limb Prosthesis, Nian-Zhong Chen, Winson Lee, Ming Zhang

Faculty of Engineering and Information Sciences - Papers: Part A

Lower-limb prostheses are used to restore amputee's walking. Monolimb is one of the designs referring to socket and the shank being molded into one piece of thermoplastic material. Appropriate shank flexibility of a monolimb can improve gait of an amputee. However, during the fabrication, the variations of design variables are inevitably produced which may lead the unexpected shank deflection and directly influence on gait efficiency of an amputee. This paper presents a robust design procedure for improvement of quality of the monolimb by simultaneously minimizing performance variations caused by variations in design variables and bringing the mean value of ...


Unadulterated Spectral Function Of Low-Energy Quasiparticles In Bi2sr2cacu2o8+Delta, D V. Evtushinsky, A A. Kordyuk, S V. Borisenko, V B. Zabolotnyy, M Knupfer, J Fink, B Büchner, A. V. Pan, A Erb, C T. Lin, H Berger Jan 2006

Unadulterated Spectral Function Of Low-Energy Quasiparticles In Bi2sr2cacu2o8+Delta, D V. Evtushinsky, A A. Kordyuk, S V. Borisenko, V B. Zabolotnyy, M Knupfer, J Fink, B Büchner, A. V. Pan, A Erb, C T. Lin, H Berger

Faculty of Engineering and Information Sciences - Papers: Part A

Fitting the momentum distribution photoemission spectra to the Voigt profile appears to be a robust procedure to purify the interaction effects from the experimental resolution. In application to Bi2Sr2CaCu2O8+delta high-Tc cuprates, the procedure reveals the true scattering rate at low binding energies and temperatures, and consequently, the true value of the elastic scattering. Reaching the minimal value ~16 meV, the elastic scattering does not reveal a systematic dependence on doping level, but is rather sensitive to impurity concentration and can be explained by the forward scattering on out-of-plane impurities. The inelastic scattering is found to form well-defined quasiparticles with ...


Network Measures And Simulation For Knowledge Intensive Work Performance, Kon Shing Kenneth Chung, Liaquat Hossain, Joseph Davis Jan 2006

Network Measures And Simulation For Knowledge Intensive Work Performance, Kon Shing Kenneth Chung, Liaquat Hossain, Joseph Davis

Faculty of Engineering and Information Sciences - Papers: Part A

We describe the process of designing a reliable and valid instrument for collecting network and attribute data. Here, we explore the relationship between social networks structure, information and communication technologies (ICT) use and attitude towards performance in knowledge intensive work. We first develop a model for exploring the inherent relationship between the three concepts based on existing literature. We then develop appropriate item sets for measuring different independent (network structure, ICT use) and dependent variables (performance). We use the reliable item sets along with justifications to construct different phases of our instrument. In doing so, we introduce a simulation approach ...


Direction-Of-Arrival Estimation In The Presence Of Unknown Nonuniform Noise Fields, Yuntao Wu, Chaohuan Hou, Guisheng Liao, Qinghua Guo Jan 2006

Direction-Of-Arrival Estimation In The Presence Of Unknown Nonuniform Noise Fields, Yuntao Wu, Chaohuan Hou, Guisheng Liao, Qinghua Guo

Faculty of Engineering and Information Sciences - Papers: Part A

A new method for estimating directions-of-arrival (DOA) of multiple spatial narrowband signals in the presence of spatially nonuniform independent sensor noise with unknown covariance is presented. An estimate of the colored noise-covariance matrix is given first. The received data for parameter estimation is then prewhitened using the estimated noise covariance, hence, overcoming the highly biased estimates. Furthermore, the performance improvement of standard MUSIC method is confirmed by computer simulations. © 2006 IEEE.


Using Rfid And Bluetooth For Localised Interaction With Wireless Embedded Internet Devices, Matthew D'Souza, Montserrat Ros, Adam Postula Jan 2006

Using Rfid And Bluetooth For Localised Interaction With Wireless Embedded Internet Devices, Matthew D'Souza, Montserrat Ros, Adam Postula

Faculty of Engineering and Information Sciences - Papers: Part A

Interaction with embedded devices can take on many forms. This paper describes the implementation of an interactive information network and intuitive mechanisms for the personal or home environment using Bluetooth wireless communication and Radio Frequency ID (RFID) tag technology. This approach combines the freedom associated with wireless communication and the ability to detect user commands by RFID location information. Embedded Access Points are described along with intuitive mechanisms including digital pen/paper, interactive information board and mobile computing devices. Specifically, the web access point facilitated an Internet over Bluetooth link and was found to provide an average data rate of ...


Specifying System Requirements Using The 5s Method, Robert B. K Brown, Peter Hyland, Ian C. Piper Jan 2006

Specifying System Requirements Using The 5s Method, Robert B. K Brown, Peter Hyland, Ian C. Piper

Faculty of Engineering and Information Sciences - Papers: Part A

The 5S Method takes an Activity Theory approach to stakeholder elicitation. We interview stakeholders and build up a network of Activities according to Activity Theory precepts. These Activities are hierarchically decomposed into the smaller units of Action and Operation. This comprises a useful conceptual map of the human motivations and dependencies prior to insertion of the new computer based system. To identify and describe such a potential computer system, we analyse and identify linkages between the Activities and assemble a list of those which could usefully pass through such a computer system. Design decisions are driven and evaluated by reference ...


An Analytic Approach To Spectral Flow In Von Neumann Algebras, M-T Benameur, Alan L. Carey, John Phillips, Adam C. Rennie, Fyodor A. Sukochev, K P. Wojciechowski Jan 2006

An Analytic Approach To Spectral Flow In Von Neumann Algebras, M-T Benameur, Alan L. Carey, John Phillips, Adam C. Rennie, Fyodor A. Sukochev, K P. Wojciechowski

Faculty of Engineering and Information Sciences - Papers: Part A

The analytic approach to spectral flow is about ten years old. In that time it has evolved to cover an ever wider range of examples. The most critical extension was to replace Fredholm operators in the classical sense by Breuer-Fredholm operators in a semifinite von Neumann algebra. The latter have continuous spectrum so that the notion of spectral flow turns out to be rather more difficult to deal with. However quite remarkably there is a uniform approach in which the proofs do not depend on discreteness of the spectrum of the operators in question. The first part of this paper ...


Flexural Behaviour Of Hybrid Frp-Concrete-Steel Double Skin Tubular Members, T Yu, Y L. Wong, J G. Teng, S L. Dong, E S.S Lam Jan 2006

Flexural Behaviour Of Hybrid Frp-Concrete-Steel Double Skin Tubular Members, T Yu, Y L. Wong, J G. Teng, S L. Dong, E S.S Lam

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the results of an experimental study on the flexural behavior of a new type of hybrid FRP-concrete-steel member as well as results from a corresponding theoretical model based on the plane section assumption and the fiber element approach. This new type of hybrid member is in the form of a double-skin tube, composed of a steel inner tube and an FRP outer tube with a concrete infill between the two tubes, and may be employed as columns or beams. The parameters examined in this study include the section configuration, the concrete strength, and the thicknesses of the ...


Explicit Dynamic Fem Analysis Of Multipass Vertical-Horizontal Rolling, Hai-Liang Yu, Xiang-Hua Liu, Xian-Ming Zhao, Di Wu, Y Kusaba Jan 2006

Explicit Dynamic Fem Analysis Of Multipass Vertical-Horizontal Rolling, Hai-Liang Yu, Xiang-Hua Liu, Xian-Ming Zhao, Di Wu, Y Kusaba

Faculty of Engineering and Information Sciences - Papers: Part A

Three passes of plate rolling during vertical-horizontal rolling process are simulated with explicit dynamic finite element method and updating geometric method. The equivalent strain and stress fields, and shape change at the head and tail of slab during rolling are obtained. The calculated result of the shape at the head and tail of slab is in good agreement with the measured one. The explicit dynamic finite element method and updating geometric method can be used effectively to analyze the multipass vertical-horizontal (V-H) rolling process. © 2006 Central Iron and Steel Research Institute.


An Agent-Oriented Approach To Change Propagation In Software Evolution, Khanh Hoa Dam, Michael Winikoff, Lin Padgham Jan 2006

An Agent-Oriented Approach To Change Propagation In Software Evolution, Khanh Hoa Dam, Michael Winikoff, Lin Padgham

Faculty of Engineering and Information Sciences - Papers: Part A

Software maintenance and evolution are inevitable activities since almost all software that is useful and successful stimulates user-generated requests for change and improvements. One of the most critical problems in software maintenance and evolution is to maintain consistency between software artefacts by propagating changes correctly. Although many approaches have been proposed, automated change propagation is still a significant technical challenge in software engineering. In this paper we present a novel, agent-oriented approach to deal with change propagation in evolving software systems that are developed using the Prometheus methodology. A metamodel with a set of the Object Constraint Language (OCL) rules ...


Human Visual Perception Of Region Warping Distortions With Different Display And Scene Characteristics, Yang-Wai Chow, Ronald Pose, Matthew Regan, James Phillips Jan 2006

Human Visual Perception Of Region Warping Distortions With Different Display And Scene Characteristics, Yang-Wai Chow, Ronald Pose, Matthew Regan, James Phillips

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents human visual perception experiment results for a computer graphics rendering technique introduced in ACSC'05. In order to achieve a good immersive virtual reality experience, it is necessary to have at least 60 frames per second to ensure smooth motion. It is also necessary to have low end-to-end latency so that user interaction does not suffer from perceptible delays in images presented to the eyes. The Address Recalculation Pipeline (ARP) architecture reduces end-to-end latency in immersive Head Mounted Display (HMD) virtual reality systems. By using the ARP in conjunction with priority rendering, different sections of the scene ...


Stereoscopic Visualization And Editing Of Automatic Abdominal Aortic Aneurysms (Aaa) Measurements For Stent Graft Planning, Luping Zhou, Yaping Wang, Lin-Chia Goh, Ralf A. Kockro, Luis Serra Jan 2006

Stereoscopic Visualization And Editing Of Automatic Abdominal Aortic Aneurysms (Aaa) Measurements For Stent Graft Planning, Luping Zhou, Yaping Wang, Lin-Chia Goh, Ralf A. Kockro, Luis Serra

Faculty of Engineering and Information Sciences - Papers: Part A

For stent graft selection in the treatment of abdominal aortic aneurysms (AAA) anatomic considerations are important. They determine GO/NO-GO of the treatment and help customize the stent. Current systems for AAA stent insertion planning based on pre-operative CT and MR of the patient do not provide an intuitive interface to view the resulting measurements against the pre-operative CT/MR. Subsequent modifications of the measurements are frequent when automatic algorithms are inaccurate. However, 3D editing is difficult to achieve because of the limitations of monoscopic displays and 2D interface. In this paper, we present a system for automatic AAA measurement ...


Gaussian Message Passing On Linear Models: An Update, Hans-Andrea Loeliger, Junli Hu, Sascha Korl, Qinghua Guo, Li Ping Jan 2006

Gaussian Message Passing On Linear Models: An Update, Hans-Andrea Loeliger, Junli Hu, Sascha Korl, Qinghua Guo, Li Ping

Faculty of Engineering and Information Sciences - Papers: Part A

This semi-tutorial paper considers message passing algorithms on factor graphs of linear Gaussian models. Freshly polished tables of message computation rules are given and their use is demonstrated for soft-in soft-out equalization.


Experience In The Application Of Iec/Tr 61000-3-6 To Harmonic Allocation In Transmission Systems, T J. Browne, V J. Gosbell, S Perera, D A. Robinson, L M. Falla, P J. Windle, A C. D Perera Jan 2006

Experience In The Application Of Iec/Tr 61000-3-6 To Harmonic Allocation In Transmission Systems, T J. Browne, V J. Gosbell, S Perera, D A. Robinson, L M. Falla, P J. Windle, A C. D Perera

Faculty of Engineering and Information Sciences - Papers: Part A

Technical report IEC/TR 61000-3-6 is widely used as a guide to harmonic management in HV and MV networks, assisting in coordination of harmonic levels between utility and customer. In 2001, Australia and New Zealand adopted the harmonic standard AS/NZS 61000.3.6, which closely follows the above IEC technical report. As a result, transmission utilities and connected loads are required by government regulations to abide by the harmonic allocations set by the standard. The technical report contains some useful general principles which can be applied to the harmonic management of power systems. However, unexpected difficulties can be found ...


Comparison Of Channelized Hotelling And Human Observers In Determining Optimum Os-Em Reconstruction Parameters For Myocardial Spect, Karen L. Gilland, Benjamin M. W Tsui, Yujin Qi, Grant T. Gullberg Jan 2006

Comparison Of Channelized Hotelling And Human Observers In Determining Optimum Os-Em Reconstruction Parameters For Myocardial Spect, Karen L. Gilland, Benjamin M. W Tsui, Yujin Qi, Grant T. Gullberg

Faculty of Engineering and Information Sciences - Papers: Part A

The performance of the Channelized Hotelling Observer (CHO) was compared to that of human observers for determining optimum parameters for the iterative OS-EM image reconstruction method for the task of defect detection in myocardial SPECT images. The optimum parameters were those that maximized defect detectability in the SPECT images. Low noise, parallel SPECT projection data, with and without an anterior, inferior or lateral LV wall defect, were simulated using the Monte Carlo method. Poisson noise was added to generate noisy realizations. Data were reconstructed using OS-EM at 1 & 4 subsets/iteration and at 1, 3, 5, 7 & 9 iterations. Images ...


Validation Of The Geant4 Bremsstrahlung Models: First Results, S Chauvie, S Guatelli, B Mascialino, L Pandola, M G. Pia, P Rodrigues, A Trindade Jan 2006

Validation Of The Geant4 Bremsstrahlung Models: First Results, S Chauvie, S Guatelli, B Mascialino, L Pandola, M G. Pia, P Rodrigues, A Trindade

Faculty of Engineering and Information Sciences - Papers: Part A

A project is in progress for a systematic, rigorous validation of Geant4 electromagnetic physics. This paper presents the first results concerning the validation of Geant4 bremsstrahlung models against experimental data.


Geant4 Simulation For Lhc Radiation Monitoring, M Glaser, S Guatelli, B Mascialino, M Moll, M G. Pia, F Ravotti Jan 2006

Geant4 Simulation For Lhc Radiation Monitoring, M Glaser, S Guatelli, B Mascialino, M Moll, M G. Pia, F Ravotti

Faculty of Engineering and Information Sciences - Papers: Part A

Monitoring radiation background is a crucial task for the operation of LHC experiments. A project is in progress at CERN for the optimisation of the radiation monitors for LHC experiments. A simulation system based on Geant4, designed to assist the engineering optimisation of LHC radiation monitor detectors, is presented. Various detector packaging configurations are studied through their Geant4-based simulation, and their behaviour is compared.


Models Of Biological Effects Of Radiation In The Geant4 Toolkit, S Chauvie, Z Francis, S Guatelli, S Incerti, G Montarou, P Nieminen, M G. Pia Jan 2006

Models Of Biological Effects Of Radiation In The Geant4 Toolkit, S Chauvie, Z Francis, S Guatelli, S Incerti, G Montarou, P Nieminen, M G. Pia

Faculty of Engineering and Information Sciences - Papers: Part A

A project, named Geant4-DNA, is in progress to extend the Geant4 simulation toolkit to model the effects of radiation with biological systems at cellular and DNA level. The first component implemented in the first development cycle of the project describes the fractional survival of a population of cells irradiated with photons or charged particles. The software system developed provides the user the option to choose among a small set of alternative models for the calculation of mammalian cell survival after irradiation. The flexible design adopted makes the system open to further extension to implement other cell survival models available in ...


Geant4 Antropomorphic Phantoms, Susanna Guatelli, Barbara Mascialino, Maria Grazia Pia, Witold Pokorski Jan 2006

Geant4 Antropomorphic Phantoms, Susanna Guatelli, Barbara Mascialino, Maria Grazia Pia, Witold Pokorski

Faculty of Engineering and Information Sciences - Papers: Part A

A novel architectural approach to the design of human phantom software models is presented. A detailed design has been developed to enable the adoption of this approach in Geant4-based simulation applications. A few preliminary implementations and application demonstrations are described.


Jacket Matrices Constructed From Hadamard Matrices And Generalized Hadamard Matrices, Ken Finlayson, Moon Ho Lee, Jennifer Seberry, Mieko Yamada Jan 2006

Jacket Matrices Constructed From Hadamard Matrices And Generalized Hadamard Matrices, Ken Finlayson, Moon Ho Lee, Jennifer Seberry, Mieko Yamada

Faculty of Engineering and Information Sciences - Papers: Part A

Jacket matrices constructed from Hadamard matrices and generalized Hadamard matrices.


Geant4 Simulation In A Distributed Computing Environment, Susanna Guatelli, Alfonso Mantero, Patricia Mendez Lorenzo, Jakub Moscicki, Maria Grazia Pia Jan 2006

Geant4 Simulation In A Distributed Computing Environment, Susanna Guatelli, Alfonso Mantero, Patricia Mendez Lorenzo, Jakub Moscicki, Maria Grazia Pia

Faculty of Engineering and Information Sciences - Papers: Part A

A general system to perform a Geant4-based simulation in a distributed computing environment is presented. The architecture developed makes the system transparent to sequential or parallel execution and to the environment where the simulation is run: a single machine, a local cluster or a geographically distributed grid.


Validation Of Geant4 Electromagnetic And Hadronic Models Against Proton Data, G A. P Cirrone, G Cuttone, F Di Rosa, S Guatelli, B Mascialino, M G. Pia, G Russo Jan 2006

Validation Of Geant4 Electromagnetic And Hadronic Models Against Proton Data, G A. P Cirrone, G Cuttone, F Di Rosa, S Guatelli, B Mascialino, M G. Pia, G Russo

Faculty of Engineering and Information Sciences - Papers: Part A

A comprehensive, rigorous validation of Geant4 electromagnetic and hadronic models pertinent to the simulation of the proton Bragg peak in water is presented. Geant4 simulation results are validated against high precision experimental data taken in the CATANA hadrontherapy facility.