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Full-Text Articles in Social and Behavioral Sciences

Environmental Sustainability Of Soft Soil Improvement Via Vacuum And Surcharge Preloading, Cholachat Rujikiatkamjorn, Buddhima Indraratna Jan 2014

Environmental Sustainability Of Soft Soil Improvement Via Vacuum And Surcharge Preloading, Cholachat Rujikiatkamjorn, Buddhima Indraratna

Faculty of Engineering and Information Sciences - Papers: Part A

Due to environmental concerns, sustainable ground improvement is considered a critical part of modern infrastructure development. Current policy on environmental sustainability often expects noise-free, chemical-free, and low carbon emission processes, while being economical. In this context, the application of prefabricated vertical drains (PVD) with vacuum preloading is regarded as one of the most sustainable ground improvement techniques. Compared with other ground improvement methods such as piling and chemical stabilization, this method will not only save a considerable cost in embankment construction, but will also improve the construction rate of coastal highways and rail tracks and their load-carrying capacity. The utilization …


Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García Jan 2014

Total Electron Scattering Cross Sections For Pyrimidine And Pyrazine As Measured Using A Magnetically Confined Experimental System, M Fuss, A Sanz, Francisco Blanco, J C. Oller, Paulo Limao-Vieira, M J. Brunger, Gustavo García

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, a recently constructed apparatus for measuring electron scattering cross sections while applying a strong axial magnetic field is utilized for determining total scattering cross sections. The first molecules studied with this setup are pyrimidine (1,3-diazine) and pyrazine (1,4-diazine), whose total cross sections are obtained for the incident electron energy range of 8-500 eV. Quite good agreement with earlier theoretical predictions is found after accounting for the angular acceptance (angular resolution for forward scattering) of the apparatus. However, no other experimental total cross sections for electron scattering from pyrimidine or pyrazine have been found in the literature for …


Numerical Analysis Of High-Strength Concrete-Filled Steel Tubular Slender Beam-Columns Under Cyclic Loading, Vipulkumar Patel, Qing Quan Liang, Muhammad N. S Hadi Jan 2014

Numerical Analysis Of High-Strength Concrete-Filled Steel Tubular Slender Beam-Columns Under Cyclic Loading, Vipulkumar Patel, Qing Quan Liang, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part A

The effects of cyclic local buckling on the behavior of concrete-filled steel tubular (CFST) slender beam-columns under cyclic loading were approximately considered in existing analytical methods by modifying the stress– strain curve for the steel tube in compression. These methods, however, cannot simulate the progressive cyclic local buckling of the steel tubes. This paper presents a new efficient numerical model for predicting the cyclic performance of high strength rectangular CFST slender beam-columns accounting for the effects of progressive cyclic local buckling of steel tube walls under stress gradients. Uniaxial cyclic constitutive laws for the concrete core and steel tubes are …


Enhanced Wall Clutter Mitigation For Compressed Through-The-Wall Radar Imaging Using Joint Bayesian Sparse Signal Recovery, Van Ha Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive Jan 2014

Enhanced Wall Clutter Mitigation For Compressed Through-The-Wall Radar Imaging Using Joint Bayesian Sparse Signal Recovery, Van Ha Tang, Abdesselam Bouzerdoum, Son Lam Phung, Fok Hing Chi Tivive

Faculty of Engineering and Information Sciences - Papers: Part A

This paper addresses the problem of wall clutter mitigation in compressed sensing through-the-wall radar imaging, where a different set of frequencies is sensed at different antenna locations. A joint Bayesian sparse approximation framework is first employed to reconstruct all the signals simultaneously by exploiting signal sparsity and correlations between antenna signals. This is in contrast to previous approaches where the signal at each antenna location is reconstructed independently. Furthermore, to promote sparsity and improve signal reconstruction accuracy, a sparsifying wavelet dictionary is employed in the sparse signal recovery. Following signal reconstruction, a subspace projection technique is applied to remove wall …


Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Racks, Benoit Gilbert, Lip H. Teh, Romain X. Badet, Kim Rasmussen Jan 2014

Influence Of Pallets On The Behaviour And Design Of Steel Drive-In Racks, Benoit Gilbert, Lip H. Teh, Romain X. Badet, Kim Rasmussen

Faculty of Engineering and Information Sciences - Papers: Part A

This paper analyses the influence of horizontal bracing restraints provided by the friction between pallet bases and rail beams on the static behaviour and design of steel drive-in storage racks. The pallet bracing restraints are shown to significantly influence the structural behaviour of the rack, and their effect on the bending moment distribution of the uprights is studied in the paper. The 2D single upright model proposed by Godley is improved in this study by including the restraints provided by the plan flexural stiffness of the rail beams and the friction between the pallets and rail beams. The improved 2D …


Closure To "Active Shear Planes Of Bolted Connections Failing In Block Shear" By Drew D. A. Clements And Lip H. Teh, Drew Clements, Lip H. Teh Jan 2014

Closure To "Active Shear Planes Of Bolted Connections Failing In Block Shear" By Drew D. A. Clements And Lip H. Teh, Drew Clements, Lip H. Teh

Faculty of Engineering and Information Sciences - Papers: Part A

The writers thank the discusser for the interest in the original paper and for the discussion, which provides the opportunity to clarify and reiterate a few points made in the original paper. The writers agree with the discusser that the behavior of bolted connections is not as simple as they appear to be to the casual observer, which is one reason why many structural collapses have been associated with connection failures. Furthermore, a substantial number of code equations for various ultimate limit states of bolted connections lead to considerable errors on either side of conservatism (Teh and Clements 2012; Teh …


Solar Pv And Battery Storage Integration Using A New Configuration Of A Three-Level Npc Inverter With Advanced Control Strategy, Hamid Teymour Ghasemabadi, Danny Soetanto, Kashem M. Muttaqi, Philip Ciufo Jan 2014

Solar Pv And Battery Storage Integration Using A New Configuration Of A Three-Level Npc Inverter With Advanced Control Strategy, Hamid Teymour Ghasemabadi, Danny Soetanto, Kashem M. Muttaqi, Philip Ciufo

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, a novel configuration of a three-level neutral-point-clamped (NPC) inverter that can integrate solar photovoltaic (PV) with battery storage in a grid-connected system is proposed. The strength of the proposed topology lies in a novel, extended unbalance three-level vector modulation technique that can generate the correct ac voltage under unbalanced dc voltage conditions. This paper presents the design philosophy of the proposed configuration and the theoretical framework of the proposed modulation technique. A new control algorithm for the proposed system is also presented in order to control the power delivery between the solar PV, battery, and grid, which …


A Review Of Recent Investigations On Voltage Unbalance Management: Further Contributions To Improvement Of Iec/Tr 61000-3-13:2008, Jayatunga Vitharanage Upuli Priyadarshani Jayatunga, Sarath Perera, Philip Ciufo, Ashish Agalgaonkar Jan 2014

A Review Of Recent Investigations On Voltage Unbalance Management: Further Contributions To Improvement Of Iec/Tr 61000-3-13:2008, Jayatunga Vitharanage Upuli Priyadarshani Jayatunga, Sarath Perera, Philip Ciufo, Ashish Agalgaonkar

Faculty of Engineering and Information Sciences - Papers: Part A

Voltage unbalance (VU) management in power systems essentially involves two major aspects: VU emission allocation at the pre-connection stage and compliance assessment at the post-connection stage of installations. This is a summary and a review paper on the recent investigations completed in relation to VU emission assessment techniques which provide further contributions to the improvement of IEC Technical Report IEC/TR61000-3-13:2008. Generalised approaches developed for the classification of different sources of unbalance at the point of evaluation (covering both radial and interconnected networks) and the evaluation of their individual contributions giving emphasis to the discrimination between customer and network responsibility on …


Voltage Unbalance Emission Allocation Using Constrained Bus Voltage Method In Radial Distribution Networks, Devinda Perera, Philip Ciufo, Sarath Perera, Lasantha Meegahapola Jan 2014

Voltage Unbalance Emission Allocation Using Constrained Bus Voltage Method In Radial Distribution Networks, Devinda Perera, Philip Ciufo, Sarath Perera, Lasantha Meegahapola

Faculty of Engineering and Information Sciences - Papers: Part A

The International Electrotechnical Committee Technical Report IEC 61000-3-13 is focused on the coordination of voltage unbalance (VU) in power systems by prescribing a methodology to determine individual VU emission allocation limits to installations. This paper provides an alternative VU emission allocation process to that of the IEC Technical Report, which is based on the concept of constrained bus voltage (CBV) method. The proposed methodology can be used in relation to radial distribution networks with symmetrical distribution lines. Several application examples of the proposed methodology are presented. It is shown that the proposed methodology is superior in comparison to the VU …


An Agent Based Model For The Simulation Of Road Traffic And Transport Demand In A Sydney Metropolitan Area, Nam N. Huynh, Vu Cao, Rohan Wickramasuriya Denagamage, Matthew Berryman, Pascal Perez, Johan Barthelemy Jan 2014

An Agent Based Model For The Simulation Of Road Traffic And Transport Demand In A Sydney Metropolitan Area, Nam N. Huynh, Vu Cao, Rohan Wickramasuriya Denagamage, Matthew Berryman, Pascal Perez, Johan Barthelemy

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


Effect Of Loading Direction On The Bearing Capacity Of Cold-Reduced Steel Sheets, Lip H. Teh, Mehmet Uz Jan 2014

Effect Of Loading Direction On The Bearing Capacity Of Cold-Reduced Steel Sheets, Lip H. Teh, Mehmet Uz

Faculty of Engineering and Information Sciences - Papers: Part A

This study is concerned with double-shear bolted connections in cold-reduced steel sheets that undergo the pure bearing failure mode of the inside sheet. Compared to the published test results of bolted connections failing in the net section fracture, those involving the bearing failure mode had very wide scatter in the ultimate test loads of specimens having seemingly similar configurations. This technical note presents the laboratory test results of 51 specimens composed of G2 and G450 steel sheets, which have very different ductility properties. One new and significant finding is that the absolute bearing capacity can be considerably higher in the …


High Retention Membrane Bioreactors: Challenges And Opportunities, Wenhai Luo, Faisal Ibney Hai, William Price, Wenshan Guo, Hao H. Ngo, Kazuo Yamamoto, Long Nghiem Jan 2014

High Retention Membrane Bioreactors: Challenges And Opportunities, Wenhai Luo, Faisal Ibney Hai, William Price, Wenshan Guo, Hao H. Ngo, Kazuo Yamamoto, Long Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

Extensive research has focussed on the development of novel high retention membrane bioreactor (HR-MBR) systems for wastewater reclamation in recent years. HR-MBR integrates high rejection membrane separation with conventional biological treatment in a single step. High rejection membrane separation processes currently used in HR-MBR applications include nanofiltration, forward osmosis, and membrane distillation. In these HR-MBR systems, organic contaminants can be effectively retained, prolonging their retention time in the bioreactor and thus enhancing their biodegradation. Therefore, HR-MBR can offer a reliable and elegant solution to produce high quality effluent. However, there are several technological challenges associated with the development of HR-MBR, …


Electrospun P2-Type Na 2/3 (Fe 1/2 Mn 1/2 )O 2 Hierarchical Nano Fibers As Cathode Material For Sodium-Ion Batteries, Sujith Kalluri, Kuok Hau Seng, Wei Kong Pang, Zaiping Guo, Zhixin Chen, Hua-Kun Liu, S X. Dou Jan 2014

Electrospun P2-Type Na 2/3 (Fe 1/2 Mn 1/2 )O 2 Hierarchical Nano Fibers As Cathode Material For Sodium-Ion Batteries, Sujith Kalluri, Kuok Hau Seng, Wei Kong Pang, Zaiping Guo, Zhixin Chen, Hua-Kun Liu, S X. Dou

Faculty of Engineering and Information Sciences - Papers: Part A

Sodium-ion batteries can be the best alternative to lithium-ion batteries, because of their similar electrochemistry, nontoxicity, and elemental abundance and the low cost of sodium. They still stand in need of better cathodes in terms of their structural and electrochemical aspects.


Dendritic Instability In Yba2cu3o7 Films Triggered By Transient Magnetic Fields, M Baziljevich, E Baruch-El, Tom Johansen, Y Yeshurun Jan 2014

Dendritic Instability In Yba2cu3o7 Films Triggered By Transient Magnetic Fields, M Baziljevich, E Baruch-El, Tom Johansen, Y Yeshurun

Faculty of Engineering and Information Sciences - Papers: Part A

Superconducting films of YBa2Cu3O7-s are shown to become thermomagnetically unstable when experiencing a time-varying perpendicular magnetic field. Using magneto-optical imaging and ramping the applied field at rates up to 3000 T/s, dendritic flux avalanches were observed in two different films, one grown by evaporation on sapphire and one by laser ablatin on SrTiO3. The unstable behaviour occurs over a wide temperature range limited by an upper threshold value of 40 K for the film on sapphire , and 20K for the one on SrTiO3. At 7 K for the same films, the threshold ramping rates are 1000 T/s and 3000 …


Analysis Of Internal Crack Healing Mechanism Under Rolling Deformation, Haitao Gao, Zhengrong Ai, Hailiang Yu, Hongyan Wu, Xianghua Liu Jan 2014

Analysis Of Internal Crack Healing Mechanism Under Rolling Deformation, Haitao Gao, Zhengrong Ai, Hailiang Yu, Hongyan Wu, Xianghua Liu

Faculty of Engineering and Information Sciences - Papers: Part A

A new experimental method, called the 'hole filling method', is proposed to simulate the healing of internal cracks in rolled workpieces. Based on the experimental results, the evolution in the microstructure, in terms of diffusion, nucleation and recrystallisation were used to analyze the crack healing mechanism. We also validated the phenomenon of segmented healing. Internal crack healing involves plastic deformation, heat transfer and an increase in the free energy introduced by the cracks. It is proposed that internal cracks heal better under high plastic deformation followed by slow cooling after rolling. Crack healing is controlled by diffusion of atoms from …


Ant-Inspired Multi-Phase And Multi-Party Negotiations In The Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Qingguo Zhou, Ghassan Beydoun Jan 2014

Ant-Inspired Multi-Phase And Multi-Party Negotiations In The Data-Intensive Service Provision, Lijuan Wang, Jun Shen, Qingguo Zhou, Ghassan Beydoun

Faculty of Engineering and Information Sciences - Papers: Part A

The rapid proliferation of enormous sources of digital data and the development of cloud computing have led to greater dependence on data-intensive services. Each service may actually request or create a large amount of data sets. To compose these services will be more challenging. Issues of autonomy, scalability, adaptability, and robustness, become difficult to resolve. In order to automate the process of reaching an agreement in data-intensive service provision, the ant-inspired negotiation mechanism is considered in this paper. There are twostage negotiation procedures in our model, which will provide effective and efficient service selection for service composers. We also present …


An Adaptively Cca-Secure Ciphertext-Policy Attribute-Based Proxy Re-Encryption For Cloud Data Sharing, Kaitai Liang, Man Ho Au, Willy Susilo, Duncan Wong, Guomin Yang, Yong Yu Jan 2014

An Adaptively Cca-Secure Ciphertext-Policy Attribute-Based Proxy Re-Encryption For Cloud Data Sharing, Kaitai Liang, Man Ho Au, Willy Susilo, Duncan Wong, Guomin Yang, Yong Yu

Faculty of Engineering and Information Sciences - Papers: Part A

A Ciphertext-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) employs the PRE technology in the attribute-based en- cryption cryptographic setting, in which the proxy is allowed to convert an encryption under an access policy to another encryption under a new access policy. CP-ABPRE is applicable to many real world applications, such as network data sharing. The existing CP-ABPRE systems, how- ever, leave how to achieve adaptive CCA security as an interesting open problem. This paper, for the rst time, proposes a new CP-ABPRE to tackle the problem by integrating the dual system encryption technology with selective proof technique. The new scheme supports any …


Goaf Frictional Ignition And Its Control Measures In Underground Coal Mines, Gaofeng Wang, Ting Ren, Christopher David Cook Jan 2014

Goaf Frictional Ignition And Its Control Measures In Underground Coal Mines, Gaofeng Wang, Ting Ren, Christopher David Cook

Faculty of Engineering and Information Sciences - Papers: Part A

Goaf Frictional Ignition (GFI) poses a serious threat to the safety of underground coal mines, and has caused many underground fires and catastrophic explosions. This paper examined occurrences of GFI incidents and the underlying mechanisms of ignition source and environment. Most of these incidents were attributed to rock on rock frictional ignition. The eventuation of frictional ignition relies on the presence of hot spots with enough incendive ignition energy, which requires a minimum threshold sliding distance and sliding velocity. The incendivity of the environment can be enhanced by the presence of liquid carbon hydrogen, the increase of virgin rock temperature, …


Source Strength And Dispersion Of Co2 Releases From High-Pressure Pipelines: Cfd Model Using Real Gas Equation Of State, Xiong Liu, Ajit Godbole, Cheng Lu, Guillaume Michal, Phillip Venton Jan 2014

Source Strength And Dispersion Of Co2 Releases From High-Pressure Pipelines: Cfd Model Using Real Gas Equation Of State, Xiong Liu, Ajit Godbole, Cheng Lu, Guillaume Michal, Phillip Venton

Faculty of Engineering and Information Sciences - Papers: Part A

Transportation of CO2 in high-pressure pipelines forms a crucial link in the ever-increasing application of Carbon Capture and Storage (CCS) technologies. An unplanned release of CO2 from a pipeline presents a risk to human and animal populations and the environment. Therefore it is very important to develop a deeper understanding of the atmospheric dispersion of CO2 before the deployment of CO2 pipelines, to allow the appropriate safety precautions to be taken. This paper presents a two-stage Computational Fluid Dynamics (CFD) study developed (1) to estimate the source strength, and (2) to simulate the subsequent dispersion of CO2 in the atmosphere, …


A Synergetic Combination Of Small And Large Neighborhood Schemes In Developing An Effective Procedure For Solving The Job Shop Problem, Mehrdad Amirghasemi, Reza Zamani Jan 2014

A Synergetic Combination Of Small And Large Neighborhood Schemes In Developing An Effective Procedure For Solving The Job Shop Problem, Mehrdad Amirghasemi, Reza Zamani

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents an effective procedure for solving the job shop problem. Synergistically combining small and large neighborhood schemes, the procedure consists of four components, namely (i) a construction method for generating semi-active schedules by a forward-backward mechanism, (ii) a local search for manipulating a small neighborhood structure guided by a tabu list, (iii) a feedback-based mechanism for perturbing the solutions generated, and (iv) a very large-neighborhood local search guided by a forward-backward shifting bottleneck method. The combination of shifting bottleneck mechanism and tabu list is used as a means of the manipulation of neighborhood structures, and the perturbation mechanism …


Optimal Energy For Cell Radiosensitivity Enhancement By Gold Nanoparticles Using Synchrotron-Based Monoenergetic Photon Beams, Wan Nordiana Rahman, Stephanie Corde, Naoto Yagi, Siti Aishah Abdul Aziz, Nathan Annabell, Moshi Geso Jan 2014

Optimal Energy For Cell Radiosensitivity Enhancement By Gold Nanoparticles Using Synchrotron-Based Monoenergetic Photon Beams, Wan Nordiana Rahman, Stephanie Corde, Naoto Yagi, Siti Aishah Abdul Aziz, Nathan Annabell, Moshi Geso

Faculty of Engineering and Information Sciences - Papers: Part A

Gold nanoparticles have been shown to enhance radiation doses delivered to biological targets due to the high absorption coefficient of gold atoms, stemming from their high atomic number (Z) and physical density. These properties significantly increase the likelihood of photoelectric effects and Compton scattering interactions. Gold nanoparticles are a novel radiosensitizing agent that can potentially be used to increase the effectiveness of current radiation therapy techniques and improve the diagnosis and treatment of cancer. However, the optimum radiosensitization effect of gold nanoparticles is strongly dependent on photon energy, which theoretically is predicted to occur in the kilovoltage range of energy. …


A Competitive Interstate Rail Freight And Passenger Network, Philip Laird Jan 2014

A Competitive Interstate Rail Freight And Passenger Network, Philip Laird

Faculty of Engineering and Information Sciences - Papers: Part A

An outline is given of the East - West rail corridor linking Melbourne, Adelaide and Perth, and the North - South corridor between Melbourne, Sydney and Brisbane. The competitiveness of freight services on the North - South corridor is limited due to 'steam age' alignment and low clearances. Both corridors have lower axle loads and restricted train lengths when compared with mainlines of the two Canadian Class I railroads. The Brisbane Cairns corridor is cited as an example of where rail deviations completed during the 1990s have allowed for faster and heavier freight trains and the effective introduction of tilt …


Analysis Of Thin Strip Profile During Asymmetrical Cold Rolling With Roll Crossing And Shifting Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei Jan 2014

Analysis Of Thin Strip Profile During Asymmetrical Cold Rolling With Roll Crossing And Shifting Mill, Abdulrahman Aljabri, Zhengyi Jiang, Dongbin Wei

Faculty of Engineering and Information Sciences - Papers: Part A

Strip profile control during rolling is required to assure the dimensional quality of rolled thin strip is acceptable for customers. Throughout rolling, the strip profile is controlled by using the advanced shape control rolling mill, such as the combination of work roll crossing and shifting during asymmetrical rolling, the one of the valuable methods to control the strip profile quality in rolling process. In this paper, the influences of cold rolling parameters such as the crossing angle and axial shifting value of work rolls on the strip profile are analysed. The strip shape control is discussed under both symmetrical and …


A Secure Ipv6 Address Configuration Protocol For Vehicular Networks, Xiaonan Wang, Yi Mu, Guangjie Han, Deguang Le Jan 2014

A Secure Ipv6 Address Configuration Protocol For Vehicular Networks, Xiaonan Wang, Yi Mu, Guangjie Han, Deguang Le

Faculty of Engineering and Information Sciences - Papers: Part A

This paper proposes a secure address configuration protocol for IPv6-based vehicular networks. In this protocol, the network architecture is proposed. In this architecture, a vehicle obtains a unique address from a neighbor vehicle or an access point without DAD, and a leaving vehicle's address space can be automatically reclaimed for reassignment. Based on this architecture, the address configuration algorithm is presented. In this algorithm, an access point or a vehicle owns the unique address space and assigns a unique address to a neighbor vehicle without DAD, so the address configuration cost and delay are lowered. The identification of a vehicle …


Twisted C-Algebras Associated To Finitely Aligned Higher-Rank Graphs, Aidan Sims, Benjamin Whitehead, Michael Whittaker Jan 2014

Twisted C-Algebras Associated To Finitely Aligned Higher-Rank Graphs, Aidan Sims, Benjamin Whitehead, Michael Whittaker

Faculty of Engineering and Information Sciences - Papers: Part A

We introduce twisted relative Cuntz-Krieger algebras associated to finitely aligned higher-rank graphs and give a comprehensive treatment of their fundamental structural properties. We establish versions of the usual uniqueness theorems and the classification of gauge-invariant ideals. We show that all twisted relative Cuntz- Krieger algebras associated to finitely aligned higher-rank graphs are nuclear and satisfy the UCT, and that for twists that lift to real-valued cocycles, the K-theory of a twisted relative Cuntz-Krieger algebra is independent of the twist. In the final section, we identify a sufficient condition for simplicity of twisted Cuntz-Krieger algebras associated to higher-rank graphs which are …


Optimal Design Of Vertical Ground Heat Exchangers By Using Entropy Generation Minimization Method And Genetic Algorithms, Su Huang, Zhenjun Ma, Paul Cooper Jan 2014

Optimal Design Of Vertical Ground Heat Exchangers By Using Entropy Generation Minimization Method And Genetic Algorithms, Su Huang, Zhenjun Ma, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the development and validation of an optimal design methodology for vertical U-tube ground heat exchangers (GHEs) used in HVAC systems. The dimensionless entropy generation number obtained by scaling the entropy generation due to heat transfer and pressure drop, on the ratio of the heat transfer rate to the average fluid temperature of vertical GHEs is employed as the objective function. Five design variables are first selected based on the global sensitivity analysis and then optimized by a genetic algorithm optimization technique. The entropy generation process combines the heat transfer and fluid mechanics with thermodynamic analysis. A case …


Quantitative Trait Loci For Thermal Time To Flowering And Photoperiod Responsiveness Discovered In Summer Annual-Type Brassica Napus L, Matthew Nelson, Ravikesavan Rajasekaran, Alison Smith, Sheng Chen, Cameron Beeck, Kadambot Siddique, Wallace Cowling Jan 2014

Quantitative Trait Loci For Thermal Time To Flowering And Photoperiod Responsiveness Discovered In Summer Annual-Type Brassica Napus L, Matthew Nelson, Ravikesavan Rajasekaran, Alison Smith, Sheng Chen, Cameron Beeck, Kadambot Siddique, Wallace Cowling

Faculty of Engineering and Information Sciences - Papers: Part A

Time of flowering is a key adaptive trait in plants and is conditioned by the interaction of genes and environmental cues including length of photoperiod, ambient temperature and vernalisation. Here we investigated the photoperiod responsiveness of summer annual-types of Brassica napus (rapeseed, canola). A population of 131 doubled haploid lines derived from a cross between European and Australian parents was evaluated for days to flowering, thermal time to flowering (measured in degree-days) and the number of leaf nodes at flowering in a compact and efficient glasshouse-based experiment with replicated short and long day treatments. All three traits were under strong …


How To Attract Foreign Firms To Do Australian Infrastructure, Garry Bowditch Jan 2014

How To Attract Foreign Firms To Do Australian Infrastructure, Garry Bowditch

Faculty of Engineering and Information Sciences - Papers: Part A

Australia's two biggest construction companies, Leighton and Lend Lease, control a significant share of construction - up to 75% in cases such as major rail projects. The recent Productivity Commission draft report on public infrastructure found their combined "market shares would appear sufficient to allow them to exercise market power to inflate prices and/or profits". At the same time, the Commission noted that no evidence exists to support such a proposition. A more important unanswered question remains - what conditions are necessary to attract foreign firms to help Australia deliver cheaper, faster and better infrastructure? Looking abroad for solutions can …


Beggar Bowl Politics Blocks Federation's Potential, Garry Bowditch Jan 2014

Beggar Bowl Politics Blocks Federation's Potential, Garry Bowditch

Faculty of Engineering and Information Sciences - Papers: Part A

Calls to lift the GST rate to placate the states financial challenges will serve to only exacerbate an already severe vertical fiscal imbalance and prolong a deeply unsatisfactory chapter in Australia's Federation. While ever the states are hostage to an extreme reliance on Federal funding, beggar bowl politics will remain the tactic of choice. Unfortunately competition between the states has degenerated into a scramble to divide the Federation's economic spoils rather than its multiplication. The Abbott Government must break this impasse and ensure better mechanics from a renovated Federation that underwrites productive interactions between the two levels of government. Australians …


Kms States On The C-Algebras Of Reducible Graphs, Astrid An Huef, Marcelo Laca, Iain Raeburn, Aidan Sims Jan 2014

Kms States On The C-Algebras Of Reducible Graphs, Astrid An Huef, Marcelo Laca, Iain Raeburn, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part A

We consider the dynamics on the C-algebras of finite graphs obtained by lifting the gauge action to an action of the real line. Enomoto, Fujii and Watatani [KMS states for gauge action on OA. Math. Japon. 29 (1984), 607-619] proved that if the vertex matrix of the graph is irreducible, then the dynamics on the graph algebra admits a single Kubo-Martin-Schwinger (KMS) state. We have previously studied the dynamics on the Toeplitz algebra, and explicitly described a finite-dimensional simplex of KMS states for inverse temperatures above a critical value. Here we study the KMS states for graphs with reducible vertex …