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Articles 1 - 30 of 86

Full-Text Articles in Social and Behavioral Sciences

Reliability Analysis Of Strain-Softening Slopes, Robin N. Chowdhury, Gautam Bhattacharya Jan 2011

Reliability Analysis Of Strain-Softening Slopes, Robin N. Chowdhury, Gautam Bhattacharya

Faculty of Engineering and Information Sciences - Papers: Part A

Slope reliability must be considered in the context of a variety of factors which control or influence stability or the balance between disturbing and resisting forces. The problems of slope stability are varied, ranging from fi rst-time failures to reactivated landslides and from minor, localized slope movements to catastrophic events. Reliability analysis within a probabilistic framework offers a very powerful tool for taking into consideration the variability of key geotechnical parameters as well as other uncertainties. In this paper, the progressive decrease in shear strength along potential slip surfaces is considered in terms of a residual factor treated as one ...


Effects Of Salinity And Sand Content On Liquid Limit And Hydraulic Conductivity, Behzad Fatahi, Mohammad Hadi Khabbaz, Sudip Basack Jan 2011

Effects Of Salinity And Sand Content On Liquid Limit And Hydraulic Conductivity, Behzad Fatahi, Mohammad Hadi Khabbaz, Sudip Basack

Faculty of Engineering and Information Sciences - Papers: Part A

Soil conditions of construction sites have become worse than ever due to the overpopulation in the metropolitan areas throughout the world. Likewise, the prevention of environmental risks due to individual activities is one of the most important subjects in the geo-environmental problems. Saline soils may induce several problems in geotechnical engineering projects such as infrastructure embankments, road construction and clay liners. Effect of the various concentrations of sodium chloride (NaCl) on several different soils including bentonite, kaolinite and fine sand mixtures has been evaluated. In addition, influence of salinity and the period of submergence on the hydraulic conductivity of soil ...


Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui Jan 2011

Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui

Faculty of Engineering and Information Sciences - Papers: Part A

The roll-casting technology of 5000 series aluminum alloy is one of the difficulties at present. Roll-casting technology was employed in this paper and high quality 5005 aluminum alloy sheets were fabricated successfully under different conditions. The solidification of melt in roll-casting process is the rapid directional solidification. The effect of magnetostatic field on microstructure of 5005 aluminum alloy sheet by roll-casting has been investigated and analyzed. The results indicate that imposing magnetostatic field can refine the grains of 5005 aluminum alloy.


Fuzzy Universal Hashing And Approximate Authentication, Rei Safavi-Naini, Joseph Tonien Jan 2011

Fuzzy Universal Hashing And Approximate Authentication, Rei Safavi-Naini, Joseph Tonien

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


An Analytical Method For Predicting Cogging Forces In Linear Induction Motors, Mochammad Rusli, Jeffrey W. Moscrop, Donald Platt, Christopher David Cook Jan 2011

An Analytical Method For Predicting Cogging Forces In Linear Induction Motors, Mochammad Rusli, Jeffrey W. Moscrop, Donald Platt, Christopher David Cook

Faculty of Engineering and Information Sciences - Papers: Part A

Cogging in a linear machine can be described as a variation in the magnetic forces as the machine travels along its linear uis. This effect can have a severe impact on the overall precision and even stability of the linear uis. In this paper an analytical method to predict the cogging forces in Linear Induction Moton (LIMs) is presented. An aecurate estimation of cogging is useful during the LIM design stage to help millimize this performance limiting factor. One common method used to predict cogging torques in rotary induction moton is the tooth overlap method. Due to the complexity of ...


Influence Of Angular Orientation Of The Embedded Highly Birefringent Fiber On Pmd Changes Under Axial Stress, Daniel Budaszewski, Piotr Lesiak, Robert Plaga, Ginu Rajan, Yuliya Semenova, Gerald Farrell, Anna Boczkowska, Andrzej Domanski, Tomasz Wolinski Jan 2011

Influence Of Angular Orientation Of The Embedded Highly Birefringent Fiber On Pmd Changes Under Axial Stress, Daniel Budaszewski, Piotr Lesiak, Robert Plaga, Ginu Rajan, Yuliya Semenova, Gerald Farrell, Anna Boczkowska, Andrzej Domanski, Tomasz Wolinski

Faculty of Engineering and Information Sciences - Papers: Part A

In the paper we present results of the research on polarization mode dispersion changes inside the polarimetric optical fiber sensors based on highly birefringent optical fibers embedded into composite materials with different angular orientations of the optical axes. Based on measurements made for different types of highly birefringent optical fiber sensors we have shown that strain sensitivities after lamination process are different in comparison to the data obtained before lamination. Our results indicate that polarization mode dispersion in side-hole highly birefringent fibers under axial stress strongly depends on fiber orientation in the composite material suggesting that orientation of the polarization ...


Strategies Of Crisis Management From Contingent Perspective, Wenjie Ping, Tingru Cui, Shan-Ling Pan Jan 2011

Strategies Of Crisis Management From Contingent Perspective, Wenjie Ping, Tingru Cui, Shan-Ling Pan

Faculty of Engineering and Information Sciences - Papers: Part A

The existing literature in crisis management mostly addresses specific measures taken in dealing with a single disaster. However, with chaotic nature of disasters and the uncertainty that surrounds them, the understanding of how to achieve effectiveness in crisis management remains limited. This article investigates that how government apply various capabilities in the crisis management process contingent upon different nature of disasters. By demonstrating the crisis management process from a contingent perspective, the capabilities that government should emphasis on can vary differently according to the nature of disasters. This study develops a framework for crisis management to serve as a guide ...


Novel Features Of Ars Selection In Budding Yeast Lachancea Kluyveri, Ivan Liachko, Emi Tanaka, Katherine A. Cox, Shau Chee C. Chung, Lu Yang, Arael Seher, Lindsay Hallas, Eugene Cha, Gina Kang, Heather Pace, Jasmine Barrow, Maki Inada, Bik Kwoon Tye, Uri Keich Jan 2011

Novel Features Of Ars Selection In Budding Yeast Lachancea Kluyveri, Ivan Liachko, Emi Tanaka, Katherine A. Cox, Shau Chee C. Chung, Lu Yang, Arael Seher, Lindsay Hallas, Eugene Cha, Gina Kang, Heather Pace, Jasmine Barrow, Maki Inada, Bik Kwoon Tye, Uri Keich

Faculty of Engineering and Information Sciences - Papers: Part A

Background: The characterization of DNA replication origins in yeast has shed much light on the mechanisms of initiation of DNA replication. However, very little is known about the evolution of origins or the evolution of mechanisms through which origins are recognized by the initiation machinery. This lack of understanding is largely due to the vast evolutionary distances between model organisms in which origins have been examined.Results: In this study we have isolated and characterized autonomously replicating sequences (ARSs) in Lachancea kluyveri - a pre-whole genome duplication (WGD) budding yeast. Through a combination of experimental work and rigorous computational analysis, we ...


Joint Analysis Of Beef Growth And Carcass Quality Traits Through Calculation Of Co-Variance Components And Correlations., H R. Mirzaei, Arunas P. Verbyla, W. S. Pitchford Jan 2011

Joint Analysis Of Beef Growth And Carcass Quality Traits Through Calculation Of Co-Variance Components And Correlations., H R. Mirzaei, Arunas P. Verbyla, W. S. Pitchford

Faculty of Engineering and Information Sciences - Papers: Part A

A joint growth-carcass model using random regression was used to estimate the (co)variance components of beef cattle body weights and carcass quality traits and correlations between them. During a four-year period (1994-1997) of the Australian "southern crossbreeding project", mature Hereford cows (N = 581) were mated to 97 sires of Jersey, Wagyu, Angus, Hereford, South Devon, Limousin, and Belgian Blue breeds, resulting in 1141 calves. Data included 13 (for steers) and 8 (for heifers) body weight measurements approximately every 50 days from birth until slaughter and four carcass quality traits: hot standard carcass weight, rump fat depth, rib eye muscle ...


C*-Algebras Associated To C*-Correspondences And Applications To Mirror Quantum Spheres, David I. Robertson, Wojciech Szymanski Jan 2011

C*-Algebras Associated To C*-Correspondences And Applications To Mirror Quantum Spheres, David I. Robertson, Wojciech Szymanski

Faculty of Engineering and Information Sciences - Papers: Part A

The structure of the C*-algebras corresponding to even-dimensional mirror quantum spheres is investigated. It is shown that they are isomorphic to both Cuntz-Pimsner algebras of certain C*-correspondences and C*-algebras of certain labelled graphs. In order to achieve this, categories of labelled graphs and C*-correspondences are studied. A functor from labelled graphs to C*-correspondences is constructed, such that the corresponding associated C*-algebras are isomorphic. Furthermore, it is shown that C*-correspondences for the mirror quantum spheres arise via a general construction of restricted direct sum.


Prediction Model Of A Joint Analysis Of Beef Growth And Carcass Quality Traits, H R. Mirzaei, Arunas P. Verbyla, Wayne S. Pitchford Jan 2011

Prediction Model Of A Joint Analysis Of Beef Growth And Carcass Quality Traits, H R. Mirzaei, Arunas P. Verbyla, Wayne S. Pitchford

Faculty of Engineering and Information Sciences - Papers: Part A

A joint growth-carcass analysis was conducted to develop equations for predicting carcass quality traits associated with variation in growth path of crossbred cattle. During a four-year period (1994-1997) of the Australian "Southern Crossbreeding Project", mature Hereford cows (r = 581) were mated to 97 sires of Jersey, Wagyu, Angus, Hereford, South Devon, Limousin, and Belgian Blue breeds, resulting in 1141 calves. Data included body weight measurements of steers and heifers from birth until slaughter and four carcass quality traits: hot standard carcass weight, rump fat depth, rib eye muscle area, and intramuscular fat content. The model provides nine outputs: median and ...


Modeling Of Crossbred Cattle Growth, Comparison Between Cubic And Piecewise Random Regression Models, H R. Mirzaei, Wayne S. Pitchford, Arunas P. Verbyla Jan 2011

Modeling Of Crossbred Cattle Growth, Comparison Between Cubic And Piecewise Random Regression Models, H R. Mirzaei, Wayne S. Pitchford, Arunas P. Verbyla

Faculty of Engineering and Information Sciences - Papers: Part A

Two analyses, cubic and piecewise random regression, were conducted to model growth of crossbred cattle from birth to about two years of age, investigating the ability of a piecewise procedure to fit growth traits without the complications of the cubic model. During a four-year period (1994-1997) of the Australian "Southern Crossbreeding Project", mature Hereford cows (N = 581) were mated to 97 sires of Angus, Belgian Blue, Hereford, Jersey, Limousin, South Devon, and Wagyu breeds, resulting in 1141 steers and heifers born over four years. Data included 13 (for steers) and eight (for heifers) live body weight measurements, made approximately every ...


Value Co-Creation With Customers Through Design Toolkits: The Importance Of Preference Fit And Psychological Ownership, Tingru Cui, Hua Ye, Hock Hai Teo Jan 2011

Value Co-Creation With Customers Through Design Toolkits: The Importance Of Preference Fit And Psychological Ownership, Tingru Cui, Hua Ye, Hock Hai Teo

Faculty of Engineering and Information Sciences - Papers: Part A

The information technologies increasingly enable companies to set up websites for customers to design and purchase their own individualized products. Although customer co-design offer benefits for both suppliers and customers, how to manage the co-design process, especially the central interface features of design toolkit have emerged as a contentious issue among researchers and practitioners. This paper focuses on the effects of both utilitarian and psychological customer-design product value (i.e., perceived preference fit and psychological ownership) on customers' purchase decision. Based on the self-determination theory, we propose that the effectiveness of the value increment mechanisms is influenced by three leading ...


Sensitization Behaviour Of 11-12% Cr Aisi 409 Stainless Steel During Low Heat Input Welding, Cornelis Janise Van Niekerk, Madeleine Du Toit Jan 2011

Sensitization Behaviour Of 11-12% Cr Aisi 409 Stainless Steel During Low Heat Input Welding, Cornelis Janise Van Niekerk, Madeleine Du Toit

Faculty of Engineering and Information Sciences - Papers: Part A

The study comprised of the investigation into the sensitization characteristics of AISI 409 titanium stabilized ferritic stainless steel during low heat input welding. AISI 409 is a fully ferritic stainless steel used in catalytic converters and tubing for automotive exhaust systems due to the supposition that sensitization does not occur during low heat input welding. Two plates of 2 and 4 mm were tested for sensitization during low heat input welding. The study confirmed that chromium carbide (M23C6) precipitation occurs on the grain boundaries in the heat-affected zone with consequent depletion of Cr adjacent to the grain ...


Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes Jan 2011

Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes

Faculty of Engineering and Information Sciences - Papers: Part A

The use of electroactive polymeric materials for sensing and actuating applications is very attractive due to important properties like low operating voltage, low form factor, or high mechanical flexibility. However, its use has been conditioned by the lack of available processing methods for such materials. The deposition of thin layers is very easy by conventional techniques; however obtaining patterned layers is not a trivial task. This paper presents a methodology suitable to fabricate electroactive polymeric microstructures on large area devices. Structures ranging from ∼1, 5 mm to ∼100 μm width, with a thickness of ∼12 μm, were obtained.


Tailoring The Morphology And Crystallinity Of Poly(L-Lactide Acid) Electrospun Membranes, Clarisse Ribeiro, Vitor Sencadas, Carlos M. Costa, J L. Gomez Ribelles, Senentxu Lanceros-Méndez Jan 2011

Tailoring The Morphology And Crystallinity Of Poly(L-Lactide Acid) Electrospun Membranes, Clarisse Ribeiro, Vitor Sencadas, Carlos M. Costa, J L. Gomez Ribelles, Senentxu Lanceros-Méndez

Faculty of Engineering and Information Sciences - Papers: Part A

Biodegradable poly(L-lactic acid) (PLLA) microfibers were prepared by electrospinning by varying the applied potential, solution flow rate and collector conditions. PLLA fibers with smoothly oriented and random morphologies were obtained and characterized by scanning electron microscopy. The optimum fiber orientation was obtained at 1000 rpm using a 20.3 cm diameter collecting drum, while for higher and lower drum rotation speeds, the rapid random motion of the jets resulted in a random fiber distribution. The deformation of the jet with rapid solidification during electrospinning often results in a metastable phase. PLLA electrospun fibers are amorphous but contain numerous crystal ...


Effect Of The Carbon Nanotube Surface Characteristics On The Conductivity And Dielectric Constant Of Carbon Nanotube/Poly(Vinylidene Fluoride) Composites, S A. Carabineiro, Manuel F. Pereira, J Nunes-Pereira, Cristina Caparrós, Vitor Sencadas, Senentxu Lanceros-Méndez Jan 2011

Effect Of The Carbon Nanotube Surface Characteristics On The Conductivity And Dielectric Constant Of Carbon Nanotube/Poly(Vinylidene Fluoride) Composites, S A. Carabineiro, Manuel F. Pereira, J Nunes-Pereira, Cristina Caparrós, Vitor Sencadas, Senentxu Lanceros-Méndez

Faculty of Engineering and Information Sciences - Papers: Part A

Commercial multi-walled carbon nanotubes (CNT) were functionalized by oxidation with HNO3, to introduce oxygen-containing surface groups, and by thermal treatments at different temperatures for their selective removal. The obtained samples were characterized by adsorption of N2 at -196°C, temperature-programmed desorption and determination of pH at the point of zero charge. CNT/poly(vinylidene fluoride) composites were prepared using the above CNT samples, with different filler fractions up to 1 wt%. It was found that oxidation reduced composite conductivity for a given concentration, shifted the percolation threshold to higher concentrations, and had no significant effect in the dielectric response.


Thermal, Dielectrical And Mechanical Response Of A And B-Poly(Vinilydene Fluoride)/Co-Mgo Nanocomposites, A J. Paleo, Carlos Martínez-Boubeta, Lluis Balcells, Carlos M. Costa, Vitor Sencadas, Senentxu Lanceros-Méndez Jan 2011

Thermal, Dielectrical And Mechanical Response Of A And B-Poly(Vinilydene Fluoride)/Co-Mgo Nanocomposites, A J. Paleo, Carlos Martínez-Boubeta, Lluis Balcells, Carlos M. Costa, Vitor Sencadas, Senentxu Lanceros-Méndez

Faculty of Engineering and Information Sciences - Papers: Part A

Nanocomposites of the self-forming core-shell Co-MgO nanoparticles, which were of approximately 100 nm in diameter, and poly(vinylidene fluoride) (PVDF) polymer have been prepared. When the polymer is crystallized in the a-phase, the introduction of the nanoparticles leads to nucleation of the g-phase of PVDF, increasing also the melting temperature of the polymer. With the introduction of the Co-MgO particles, the dielectric constant of the material slightly increases and the storage modulus decreases with respect to the values obtained for the pure polymer.


Multiplicity Of Solutions For Quasilinear Elliptic Equations With Critical Exponential Growth, Yanqin Fang, Jihui Zhang Jan 2011

Multiplicity Of Solutions For Quasilinear Elliptic Equations With Critical Exponential Growth, Yanqin Fang, Jihui Zhang

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper we consider a system of N-Laplacian elliptic equa- tions with critical exponential growth. The existence and multiplicity re- sults of solutions are obtained by a limit index method and Trudinger- Moser inequality.


Network Neighbor Effects On Customer Churn In Cell Phone Networks, Pavel N. Krivitsky, Pedro Ferreira, Rahul Telang Jan 2011

Network Neighbor Effects On Customer Churn In Cell Phone Networks, Pavel N. Krivitsky, Pedro Ferreira, Rahul Telang

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Statistical Requirements For Reporting Nutrition Research, Marijka Batterham Jan 2011

Statistical Requirements For Reporting Nutrition Research, Marijka Batterham

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


A Singularity Free Trajectory Tracking Method For The Cooperative Working Of Multi-Arm Robots Using Screw Theory, Emre Sariyildiz, Hakan Temeltas Jan 2011

A Singularity Free Trajectory Tracking Method For The Cooperative Working Of Multi-Arm Robots Using Screw Theory, Emre Sariyildiz, Hakan Temeltas

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper we present a singularity free trajectory tracking method for the cooperative working of multi-arm robot manipulators. It is based on an inverse kinematic transformation which determines the manipulator's joint angles corresponding to the end-effector trajectory given in the task space. The kinematic problem of multi-arm robot system is solved by using screw theory and quaternion algebra. Screw theory is an effective way to establish a global description of rigid body and avoids singularities due to the use of the local coordinates. Dual-quaternion is the most compact and efficient dual operator to express screw displacement. Inverse kinematic ...


Performance Analysis Of Numerical Integration Methods In The Trajectory Tracking Application Of Redundant Robot Manipulators, Emre Sariyildiz, Hakan Temeltas Jan 2011

Performance Analysis Of Numerical Integration Methods In The Trajectory Tracking Application Of Redundant Robot Manipulators, Emre Sariyildiz, Hakan Temeltas

Faculty of Engineering and Information Sciences - Papers: Part A

Differential kinematic is one of the most important solution methods in robot kinematics. The main advantage of the differential kinematic method is that it can be easily implemented any kind of mechanisms. Also, an accurate and efficient kinematic based trajectory tracking application can be easily implemented by using this method. In differential kinematic method, we use Jacobian as a mapping operator in the velocity space. Inversion of Jacobian matrix transforms the desired trajectory velocities, which are the linear and angular velocities of the end effector, into the joint velocities. The joint velocities are required to be integrated to obtain the ...


A Kernel Fuzzy C-Means Clustering-Based Fuzzy Support Vector Machine Algorithm For Classification Problems With Outliers Or Noises, Xiaowei Yang, Guangquan Zhang, Jie Lu, Jun Ma Jan 2011

A Kernel Fuzzy C-Means Clustering-Based Fuzzy Support Vector Machine Algorithm For Classification Problems With Outliers Or Noises, Xiaowei Yang, Guangquan Zhang, Jie Lu, Jun Ma

Faculty of Engineering and Information Sciences - Papers: Part A

The support vector machine (SVM) has provided higher performance than traditional learning machines and has been widely applied in real-world classification problems and nonlinear function estimation problems. Unfortunately, the training process of the SVM is sensitive to the outliers or noises in the training set. In this paper, a common misunderstanding of Gaussian-function-based kernel fuzzy clustering is corrected, and a kernel fuzzy c-means clustering-based fuzzy SVM algorithm (KFCM-FSVM) is developed to deal with the classification problems with outliers or noises. In the KFCM-FSVM algorithm, we first use the FCM clustering to cluster each of two classes from the training set ...


Theme-Based Comprehensive Evaluation In New Product Development Using Fuzzy Hierarchical Criteria Group Decision-Making Method, Jie Lu, Jun Ma, Guangquan Zhang, Yijun Zhu, Xianyi Zeng, Ludovic Koehl Jan 2011

Theme-Based Comprehensive Evaluation In New Product Development Using Fuzzy Hierarchical Criteria Group Decision-Making Method, Jie Lu, Jun Ma, Guangquan Zhang, Yijun Zhu, Xianyi Zeng, Ludovic Koehl

Faculty of Engineering and Information Sciences - Papers: Part A

One of the features of the digital ecosystem is the integration of human cognition and socio-economic themes into the process of new product development (NPD). In a socio-economic theme-based NPD, ranking a set of product prototypes that have been designed always requires the participation of multiple evaluators and consideration of multiple evaluation criteria. Using the well-being theme-based garment NPD as a background, this paper first presents a fuzzy hierarchical criteria group decision-making (FHCGDM) method which can effectively calculate final ranking results through fusing all assessment data from human beings and machines. It then presents a garment NPD comprehensive evaluation model ...


A Comparison Study Of The Numerical Integration Methods In The Trajectory Tracking Application Of Redundant Robot Manipulators, Emre Sariyildiz, Hakan Temeltas Jan 2011

A Comparison Study Of The Numerical Integration Methods In The Trajectory Tracking Application Of Redundant Robot Manipulators, Emre Sariyildiz, Hakan Temeltas

Faculty of Engineering and Information Sciences - Papers: Part A

Differential kinematic has a wide range application area in robot kinematics. The main advantage of the differential kinematic is that it can be easily implemented any kind of mechanisms. In differential kinematic method, Jacobian is used as a mapping operator in the velocity space. The joint velocities are required to be integrated to obtain the pose of the robot manipulator. This integration can be evaluated by using numerical integration methods, since the inverse kinematic equations are highly complex and nonlinear. Thus, the performances of the numerical integration methods affect the trajectory tracking application. This paper compares the performances of numerical ...


Self-Shape Optimisation Of Cold-Formed Steel Closed Profiles Using Genetic Algorithms, Benoit Gilbert, Lip H. Teh, Hong Guan Jan 2011

Self-Shape Optimisation Of Cold-Formed Steel Closed Profiles Using Genetic Algorithms, Benoit Gilbert, Lip H. Teh, Hong Guan

Faculty of Engineering and Information Sciences - Papers: Part A

For economical benefits, optimisation of mass-produced structural steel products is widely researched. The objective is to minimise the quantity of material used without sacrificing the strength and practicality of the structural members. Current research focuses on optimising the dimensions of conventional cross-sectional shapes but rarely considers discovering new optimum shapes. This report introduces the concepts of a new optimisation method which enables the crosssection to self-shape to an optimum by using the evolution and adaptation benefits of Genetic Algorithm. The feasibility and accuracy of the method are verified by implementing it to find optimum thin-walled profiles against simple parameters for ...


An Early Asearc - Taught Subject: Has It Been A Success?, Carole Birrell, Ken Russell Jan 2011

An Early Asearc - Taught Subject: Has It Been A Success?, Carole Birrell, Ken Russell

Faculty of Engineering and Information Sciences - Papers: Part A

A 300-level subject covering Sample Surveys and Experimental Design has now been taught jointly to the Universities of Wollongong and Newcastle for two years, first using video-conferencing and then the Access Grid. In both years the subject was delivered by the same two lectures. We provide an initial review of the subject. We discuss its organisation, the use of technology, changes in our teaching and administrative styles needed to cope with this mode of delivery, feedback from students and our reaction to all of these. An overview of the subject results is given.


Geotechnical Properties Of Reconstituted Dredged Mud, Dhanya Ganesalingam, Arul Arulrajah, Jayantha Ameratunga, Peter Boyle, Nagaratnam Sivakugan Jan 2011

Geotechnical Properties Of Reconstituted Dredged Mud, Dhanya Ganesalingam, Arul Arulrajah, Jayantha Ameratunga, Peter Boyle, Nagaratnam Sivakugan

Faculty of Engineering and Information Sciences - Papers: Part A

In the present study, laboratory tests were undertaken in order to assess the index properties and consolidation characteristics of dredged mud which is excavated during the maintenance dredging works carried out in Port of Brisbane, Queensland, Australia. These dredged spoils are reused as the fill materials in the major land reclamation project currently undertaken adjacent to the port for expanding the port facitlites. In the laboratory, index properties of dredged mud such as, particle size distuibution, Atterberg limits and specifc gravity were determined. Oedometer tests were conducted to calculate the consolidation properties of dredged mud. Laboratory resuls for consolidation properties ...


Authenticated Key Exchange Under Bad Randomness, Guomin Yang, Shanshan Duan, Duncan Wong, Chik How Tan, Huaxiong Wang Jan 2011

Authenticated Key Exchange Under Bad Randomness, Guomin Yang, Shanshan Duan, Duncan Wong, Chik How Tan, Huaxiong Wang

Faculty of Engineering and Information Sciences - Papers: Part A

We initiate the formal study on authenticated key exchange (AKE) under bad randomness. This could happen when (1) an adversary compromises the randomness source and hence directly controls the randomness of each AKE session; and (2) the randomness repeats in different AKE sessions due to reset attacks.We construct two formal security models, Reset-1 and Reset-2, to capture these two bad randomness situations respectively, and investigate the security of some widely used AKE protocols in these models by showing that they become insecure when the adversary is able to manipulate the randomness. On the positive side, we propose simple but ...