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Articles 841 - 870 of 2936
Full-Text Articles in Social and Behavioral Sciences
Microstructure Evolution During Isochronal Annealing Of A 42% Cold Rolled Trip-Twip Steel, Sudipta Pramanik, Ahmed A. Saleh, Dagoberto Brandao Santos, Elena V. Pereloma, Azdiar A. Gazder
Microstructure Evolution During Isochronal Annealing Of A 42% Cold Rolled Trip-Twip Steel, Sudipta Pramanik, Ahmed A. Saleh, Dagoberto Brandao Santos, Elena V. Pereloma, Azdiar A. Gazder
Faculty of Engineering and Information Sciences - Papers: Part A
A high manganese TRIP-TWIP steel was cold rolled to 42% thickness reduction and isochronally annealed between 600 to 900 °C for 300 s. The microstructural evolution during annealing was studied by high resolution electron back-scattering diffraction. After cold rolling, the steel comprised predominant fraction of α′-martensite, a small fraction of blocky ε-martensite and a trace fraction of retained austenite (γ). During annealing, the reversion of ε and α′ martensite to γ was followed by the recrystallisation of γ. While the processes of reversion to and recrystallisation of γ were completed by 700 °C, further annealing between 750 to 900 °C …
Improved Method For Estimation Of Multiple Parameters In Self-Mixing Interferometry, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Sheng Tong
Improved Method For Estimation Of Multiple Parameters In Self-Mixing Interferometry, Yan Gao, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Sheng Tong
Faculty of Engineering and Information Sciences - Papers: Part A
There are two categories of applications for self-mixing interference (SMI)-based sensing: (1) estimation of parameters associated with a semiconductor laser (SL) and (2) measurement of the metrological quantities of the external target. To achieve high resolution sensing, each category of applications requires knowledge from the other. This paper proposes an improved method that can simultaneously measure the parameters of an SL and the target movement in arbitrary form. Starting with the existing SMI model, we derive a new matrix equation for the measurement. The measurement matrix is built by employing all the available data samples obtained from an SMI signal. …
Optimal Design For Energy-Efficient Per-Subcarrier Antenna Selection Mimo–Ofdm Wireless Systems, Ngoc Phuc Le, Le Chung Tran, Farzad Safaei
Optimal Design For Energy-Efficient Per-Subcarrier Antenna Selection Mimo–Ofdm Wireless Systems, Ngoc Phuc Le, Le Chung Tran, Farzad Safaei
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we consider a novel optimal design for per-subcarrier antenna selection multi-input multi-output orthogonal frequency division multiplexing systems from an energy-efficiency perspective. The optimal number of antennas, i.e., the number of radio frequency chains, that needs to be built-in on a transmitter to achieve the maximum energy-efficiency is determined. Specifically, an optimization problem for maximizing the average energy-efficiency with respect to the number of antennas is formulated. To solve this optimization problem, we first derive a closed-form formula expressing the cost function (i.e., the average energy-efficiency) as a function of the number of antennas. Search algorithms are then …
Absorption Enhancement In Double-Sided Nanocone Hole Arrays For Solar Cells, Xu Zhang, Yanguang Yu, Jiangtao Xi, Yile Wang, Xiao-Hong Sun
Absorption Enhancement In Double-Sided Nanocone Hole Arrays For Solar Cells, Xu Zhang, Yanguang Yu, Jiangtao Xi, Yile Wang, Xiao-Hong Sun
Faculty of Engineering and Information Sciences - Papers: Part A
Enhancing light absorption in thin-film silicon solar cells is important for improving light harvesting efficiency and reducing manufacture cost. In this paper, we introduce a double-sided nanocone hole (NCH) array structure for solar cells by extending a model suggested by Wang et al (2012 Nano Lett. 12 1616). The top-sided NCH structure is mainly used for increasing the antireflection of incident light, and the bottom-sided NCH structure for enhancing light trapping in the near-infrared spectrum. The theoretical analysis is performed on the proposed structure, from which the optimal geometric parameters of the structure are determined. The performance analysis shows that …
An Efficient Approach To Dynamically Weighted Multizone Wideband Reproduction Of Speech Soundfields, Jacob Donley, Christian H. Ritz
An Efficient Approach To Dynamically Weighted Multizone Wideband Reproduction Of Speech Soundfields, Jacob Donley, Christian H. Ritz
Faculty of Engineering and Information Sciences - Papers: Part A
This paper proposes and evaluates an efficient approach for practical reproduction of multizone soundfields for speech sources. The reproduction method, based on a previously proposed approach, utilises weighting parameters to control the soundfield reproduced in each zone whilst minimising the number of loudspeakers required. Proposed here is an interpolation scheme for predicting the weighting parameter values of the multizone soundfield model that otherwise requires significant computational effort. It is shown that initial computation time can be reduced by a factor of 1024 with only 85dB of error in the reproduced soundfield relative to reproduction without interpolated weighting parameters. The perceptual …
Model-Based Correction For Scatter And Tailing Effects In Simultaneous 99mtc And 123i Imaging For A Cdznte Cardiac Spect Camera, Maria Holstensson, Kjell Erlandsson, Gavin Poludniowski, Simona Ben-Haim, Brian F. Hutton
Model-Based Correction For Scatter And Tailing Effects In Simultaneous 99mtc And 123i Imaging For A Cdznte Cardiac Spect Camera, Maria Holstensson, Kjell Erlandsson, Gavin Poludniowski, Simona Ben-Haim, Brian F. Hutton
Faculty of Engineering and Information Sciences - Papers: Part A
2015 Institute of Physics and Engineering in Medicine. An advantage of semiconductor-based dedicated cardiac single photon emission computed tomography (SPECT) cameras when compared to conventional Anger cameras is superior energy resolution. This provides the potential for improved separation of the photopeaks in dual radionuclide imaging, such as combined use of 99mTc and 123I . There is, however, the added complexity of tailing effects in the detectors that must be accounted for. In this paper we present a model-based correction algorithm which extracts the useful primary counts of 99mTc and 123I from projection data. Equations describing the …
Evaluation Of 3d Gamma Index Calculation Implemented In Two Commercial Dosimetry Systems, Aitang Xing, Sankar Arumugam, Shrikant Deshpande, Armia George, Philip J. Vial, Lois C. Holloway, Gary Goozee
Evaluation Of 3d Gamma Index Calculation Implemented In Two Commercial Dosimetry Systems, Aitang Xing, Sankar Arumugam, Shrikant Deshpande, Armia George, Philip J. Vial, Lois C. Holloway, Gary Goozee
Faculty of Engineering and Information Sciences - Papers: Part A
3D Gamma index is one of the metrics which have been widely used for clinical routine patient specific quality assurance for IMRT, Tomotherapy and VMAT. The algorithms for calculating the 3D Gamma index using global and local methods implemented in two software tools: PTW-VeriSoft (R) r as a part of OCTIVIUS 4D dosimeter systems and 3DVH (TM) from Sun Nuclear were assessed. The Gamma index calculated by the two systems was compared with manual calculated for one data set. The Gamma pass rate calculated by the two systems was compared using 3%/3mm, 2%/2mm, 3%/2mm and 2%/3mm for two additional data …
Is A Quasi-3d Dosimeter Better Than A 2d Dosimeter For Tomotherapy Delivery Quality Assurance?, Aitang Xing, Shrikant Deshpande, Sankar Arumugam, Armia George, Lois C. Holloway, Philip J. Vial, Gary Goozee
Is A Quasi-3d Dosimeter Better Than A 2d Dosimeter For Tomotherapy Delivery Quality Assurance?, Aitang Xing, Shrikant Deshpande, Sankar Arumugam, Armia George, Lois C. Holloway, Philip J. Vial, Gary Goozee
Faculty of Engineering and Information Sciences - Papers: Part A
Delivery quality assurance (DQA) has been performed for each Tomotherapy patient either using ArcCHECK or MatriXX Evolution in our clinic since 2012. ArcCHECK is a quasi-3D dosimeter whereas MatriXX is a 2D detector. A review of DQA results was performed for all patients in the last three years, a total of 221 DQA plans. These DQA plans came from 215 patients with a variety of treatment sites including head-neck, pelvis, and chest wall. The acceptable Gamma pass rate in our clinic is over 95% using 3mm and 3% of maximum planned dose with 10% dose threshold. The mean value and …
Terahertz (6-15 Thz) Spectroscopy And Numerical Modelling Of Intermolecular Vibrations In Benzoic Acid And Its Derivatives, Lucia Lepodise, Josip Horvat, R A. Lewis
Terahertz (6-15 Thz) Spectroscopy And Numerical Modelling Of Intermolecular Vibrations In Benzoic Acid And Its Derivatives, Lucia Lepodise, Josip Horvat, R A. Lewis
Faculty of Engineering and Information Sciences - Papers: Part A
Terahertz spectroscopy of benzoic acid (BA) and two of its derivatives, 2-hydroxybenzoic acid (2OH-BA) and 3-hydroxybenzoic acid (3OH-BA), has been investigated in the spectral region 200 to 500 cm-1 (6.06 to 15.15 THz). The spectra show distinct absorption features. There is agreement between some of the absorption lines observed for these compounds, despite a shift in energy, which is attributed to the differences in the molecular structures. Numerical modelling gave corresponding absorption lines, and this helped in the assignment. Temperature dependence studies revealed that most of the absorption lines are composite lines in this frequency region.
An Assessment Of Image Distortion And Ct Number Accuracy Within A Wide-Bore Ct Extended Field Of View, Bradley Beeksma, D Truant, Lois C. Holloway, Sankar Arumugam
An Assessment Of Image Distortion And Ct Number Accuracy Within A Wide-Bore Ct Extended Field Of View, Bradley Beeksma, D Truant, Lois C. Holloway, Sankar Arumugam
Faculty of Engineering and Information Sciences - Papers: Part A
Although wide bore computed tomography (CT) scanners provide increased space for patients, the scan field of view (sFOV) remains considerably smaller than the bore size. Consequently, patient anatomy which spans beyond the sFOV is truncated and the information is lost. As a solution, some manufacturers provide the capacity to reconstruct CT images from a partial dataset at an extended field of view (eFOV). To assess spatial distortion within this eFOV three phantoms were considered a 30 x 30 x 20 cm3 slab of solid water, the Gammex electron density CT phantom and a female anthropomorphic phantom. For each phantom, …
Energy Spectra Considerations For Synchrotron Radiotherapy Trials On The Id17 Bio-Medical Beamline At The European Synchrotron Radiation Facility, Jeffrey C. Crosbie, Pauline Fournier, Stefan Bartzsch, Mattia Donzelli, Iwan Cornelius, Andrew W. Stevenson, Herwig Requardt, Elke Brauer-Krisch
Energy Spectra Considerations For Synchrotron Radiotherapy Trials On The Id17 Bio-Medical Beamline At The European Synchrotron Radiation Facility, Jeffrey C. Crosbie, Pauline Fournier, Stefan Bartzsch, Mattia Donzelli, Iwan Cornelius, Andrew W. Stevenson, Herwig Requardt, Elke Brauer-Krisch
Faculty of Engineering and Information Sciences - Papers: Part A
The aim of this study was to validate the kilovoltage X-ray energy spectrum on the ID17 beamline at the European Synchrotron Radiation Facility (ESRF). The purpose of such validation was to provide an accurate energy spectrum as the input to a computerized treatment planning system, which will be used in synchrotron microbeam radiotherapy trials at the ESRF. Calculated and measured energy spectra on ID17 have been reported previously but recent additions and safety modifications to the beamline for veterinary trials warranted a fresh investigation. The authors used an established methodology to compare X-ray attenuation measurements in copper sheets (referred to …
3d Bridge Microdosimeter: Charge Collection Study And Application To Rbe Studies In 12C Radiation Therapy, Linh T. Tran, Dale A. Prokopovich, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Mark I. Reinhard, Anatoly B. Rosenfeld
3d Bridge Microdosimeter: Charge Collection Study And Application To Rbe Studies In 12C Radiation Therapy, Linh T. Tran, Dale A. Prokopovich, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Mark I. Reinhard, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part A
Radiotherapy using heavy ion beam such as Carbon-ion has the advantage for the treatment of deep-seated tumour over conventional radiotherapy with X-rays due to an enhanced dose deposition in the Bragg peak (BP) at the end of the ion range. The highest dose can be deposited in the tumour with much lower doses to the surrounding healthy tissue. The Relative Biological Effectiveness (RBE) of a carbon-ion radiotherapy beam greatly depends on a depth of the target volume in the body and the nuclear fragmentation process that increases close to the BP or spread out BP (SOBP) as well as neutrons. …
Performance Of Rail Ballast Stabilized With Resilient Rubber Pads Under Cyclic And Impact Loading, S K. Navaratnarajah, B Indraratna, S Nimbalkar
Performance Of Rail Ballast Stabilized With Resilient Rubber Pads Under Cyclic And Impact Loading, S K. Navaratnarajah, B Indraratna, S Nimbalkar
Faculty of Engineering and Information Sciences - Papers: Part A
Although railroads are one of the most popular modes of transportation in countries such as Sri Lanka, Australia, and USA, their rapidly growing populations and increasing congestion in road transport has created severe challenges to the sustainability of rail transport infrastructure, which in turn increases the de-mand for high speed and heavy-haul trains. Ballast is the foundation material beneath concrete sleepers that provides key structural support against the high dynamic loading exerted by moving trains. However, the deg-radation of ballast seriously affects track stability and longevity. In recent years the use of resilient rubber pads has become increasingly popular. In …
Lateral Cyclic Pile-Soil Interaction Studies On A Rigid Model Monopile, Ren-Peng Chen, Yong-Xin Sun, Bin Zhu, Wei Dong Guo
Lateral Cyclic Pile-Soil Interaction Studies On A Rigid Model Monopile, Ren-Peng Chen, Yong-Xin Sun, Bin Zhu, Wei Dong Guo
Faculty of Engineering and Information Sciences - Papers: Part A
The monopile foundation of an offshore wind turbine will unavoidably suffer from long-term cyclic loading during its lifetime, due to impacts from waves and wind. In this paper, a series of tests on a rigid model monopile, subjected to lateral cyclic loading, were carried out in Qiantang River silt to investigate the pile-soil interaction mechanism and accumulated deformation. The tests revealed that the accumulated displacement is closely related to the cyclic load ratio but has no obvious relationship with the relative density of the soil. In contrast, the unloading stiffness is independent of the cyclic ratio but is related to …
Nonlinear Response Of Lateral Piles With Compatible Cap Stiffness And P-Multiplier, Wei Dong Guo
Nonlinear Response Of Lateral Piles With Compatible Cap Stiffness And P-Multiplier, Wei Dong Guo
Faculty of Engineering and Information Sciences - Papers: Part A
Response of lateral pile groups is modeled using the more accurate (than any other numerical modeling) p − y curves-based load transfer model. It is essentially underpinned by limiting force per unit length pmpu, modulus of subgrade reaction pmk, and p-multiplier pm (to cater for pile-pile interaction, pm ¼ 1 for single piles). With the model, new closed-form solutions are developed incorporating the cap-rotational stiffness kr. The solutions are presented in nondimensional charts for free-head (kr ¼ 0) through fixed-head (kr > 10 times the pile bending stiffness). The study reveals that the existing pm (bearing no link to the stiffness …
Expansion Of Co-Compact Convex Spacelike Hypersurfaces In Minkowski Space By Their Curvature, Ben H. Andrews, Xuzhong Chen, Hanlong Fang, James A. Mccoy
Expansion Of Co-Compact Convex Spacelike Hypersurfaces In Minkowski Space By Their Curvature, Ben H. Andrews, Xuzhong Chen, Hanlong Fang, James A. Mccoy
Faculty of Engineering and Information Sciences - Papers: Part A
We consider the expansion of co-compact convex hypersurfaces in Minkowski space by functions of their curvature, and prove under quite general conditions that solutions are asymptotic to the self-similar expanding hyperboloid. In particular this implies a convergence result for a class of special solution of the cross-curvature ow of negatively curved Riemannian metrics on three-manifolds.
Analysis Of A Chemostat Model With Variable Yield Coefficient And Substrate Inhibition: Contois Growth Kinetics, Rubayyi Turki Alqahtani, Mark I. Nelson, Annette L. Worthy
Analysis Of A Chemostat Model With Variable Yield Coefficient And Substrate Inhibition: Contois Growth Kinetics, Rubayyi Turki Alqahtani, Mark I. Nelson, Annette L. Worthy
Faculty of Engineering and Information Sciences - Papers: Part A
2015, Copyright Taylor & Francis Group, LLC. We analyze the steady-state operation of a generalized reactor model that encompasses a continuous flow bioreactor and an idealized continuous flow membrane reactor as limiting cases. The biochemical reaction kinetics is governed by a Contois growth model subject to noncompetitive substrate inhibition with a variable substrate yield coefficient. The steady-state performance of the reactor is predicted and stability of the steady-state solutions as a function of dimensionless residence time reported. Our results identified two cases of practical interest. The first feature corresponds to the case where solutions to both no-washout and washout conditions …
Symmetries And Solutions Of The Non-Autonomous Von Bertalanffy Equation, Maureen P. Edwards, R Anderssen
Symmetries And Solutions Of The Non-Autonomous Von Bertalanffy Equation, Maureen P. Edwards, R Anderssen
Faculty of Engineering and Information Sciences - Papers: Part A
For growth in a closed environment, which is indicative of the situation in laboratory experiments, autonomous ODE models do not necessarily capture the dynamics under investigation. The importance and impact of a closed environment arise when the question under examination relates, for example, to the number of the surviving microbes, such as in a study of the spoilage and contamination of food, the gene silencing activity of fungi or the production of a chemical compound by bacteria or fungi. Autonomous ODE models are inappropriate as they assume that only the current size of the population controls the growth-decay dynamics. This …
Boundary Regularity Of The Solution To The Complex Monge-Ampère Equation On Pseudoconvex Domains Of Infinite Type, Ly Kim Ha, Tran Vu Khanh
Boundary Regularity Of The Solution To The Complex Monge-Ampère Equation On Pseudoconvex Domains Of Infinite Type, Ly Kim Ha, Tran Vu Khanh
Faculty of Engineering and Information Sciences - Papers: Part A
All rights reserved. Let Ω be a C2-smooth, bounded, pseudoconvex domain in ℂn satisfying the "f -property". The f -property is a consequence of the geometric "type" of the boundary. All pseudoconvex domains of finite type satisfy the f-property as well as many classes of domains of infinite type. In this paper, we prove the existence, uniqueness, and "weak" Hölder-regularity up to the boundary of the solution to the Dirichlet problem for the complex Monge-Ampère equation (Formula Presented) The idea of our proof goes back to Bedford and Taylor [1]. However, the basic geometrical ingredient is based …
Summary Of The Impact Of The Inclusion Of Mobile Phone Numbers Into The Nsw Population Health Survey In 2012, Margo Barr, Raymond A. Ferguson, Jason J. Van Ritten, Phillip J. Hughes, David G. Steel
Summary Of The Impact Of The Inclusion Of Mobile Phone Numbers Into The Nsw Population Health Survey In 2012, Margo Barr, Raymond A. Ferguson, Jason J. Van Ritten, Phillip J. Hughes, David G. Steel
Faculty of Engineering and Information Sciences - Papers: Part A
Although it was estimated that 20% of the population in Australia were mobile-only phone users in 2010, the inclusion of mobile numbers into computer-assisted telephone interviews (CATI) behavioural risk factor surveys did not occur until 2012. Methods: Three papers have been published describing the methods, weighting strategy and the impact in detail of including mobile numbers into the NSW Population Health Survey (NSWPHS). This paper identifies the important components of those papers and summarises them for a broader audience. Results: In the 2012 NSWPHS, 15,214 (15,149 with weights) interviews were completed (64% landline frame; 36% mobile frame). Response, cooperation and …
Comment On Article By Ferreira And Gamerman, Noel A. Cressie, Raymond L. Chambers
Comment On Article By Ferreira And Gamerman, Noel A. Cressie, Raymond L. Chambers
Faculty of Engineering and Information Sciences - Papers: Part A
A utility-function approach to optimal spatial sampling design is a powerful way to quantify what "optimality" means. The emphasis then should be to capture all possible contributions to utility, including scientific impact and the cost of sampling. The resulting sampling plan should contain a component of designed randomness that would allow for a non-parametric design-based analysis if model-based assumptions were in doubt.
Fatigue Properties Of Intact Sandstone In Pre And Post-Failure And Its Implication To Vibratory Rock Cutting, M N. Badge, Shivakumar Karekal
Fatigue Properties Of Intact Sandstone In Pre And Post-Failure And Its Implication To Vibratory Rock Cutting, M N. Badge, Shivakumar Karekal
Faculty of Engineering and Information Sciences - Papers: Part A
The pre-and post-failure fatigue properties of intact sandstone subjected to uni-axial cyclical loading in the laboratory is presented with its possible implication to vibratory rock cutting. The fatigue results subjected to sinusoidal, ramp and square waveforms at cyclic loading frequency of 5 Hz and peak amplitude of 0.05 mm is discussed herewith. It is observed that fatigue behaviour is a function of the dynamic energy of the load and the shape of the waveform. From the presented results, the practical significance of the behaviour of rock and rock masses within the excavation systems subjected to cyclic loads, especially in the …
Effect Of Extreme Pressure Additives On The Deformation Behavior Of Oxide Scale During The Hot Rolling Of Ferritic Stainless Steel Strips, Liang Hao, Zhengyi Jiang, Xiawei Cheng, Jingwei Zhao, Dongbin Wei, Laizhu Jiang, Suzhen Luo, Ming Luo, Li Ma
Effect Of Extreme Pressure Additives On The Deformation Behavior Of Oxide Scale During The Hot Rolling Of Ferritic Stainless Steel Strips, Liang Hao, Zhengyi Jiang, Xiawei Cheng, Jingwei Zhao, Dongbin Wei, Laizhu Jiang, Suzhen Luo, Ming Luo, Li Ma
Faculty of Engineering and Information Sciences - Papers: Part A
High-speed steel (HSS) materials are universally used as work rolls for the hot rolling of stainless steels. Their use has increased the output of the rolling mill and decreased roll material consumption and grinding. Sticking defects often occur, however, during the hot rolling process. In this article, extreme pressure (EP) additives were dropped on the HSS samples at high temperature. Zinc dialkyl dithiophosphate (ZDDP) was chosen as the most effective EP additive by scratch tests on the HSS samples. In order to determine the optimum proportion of ZDDP in the lubricant, two reduction rates were tested on a Hille 100 …
Development Of A Linear Damper Working With Magnetorheological Shear Thickening Fluids, Jian Yang, Shuaishuai Sun, Weihua Li, Haiping Du, Gursel Alici, Masami Nakano
Development Of A Linear Damper Working With Magnetorheological Shear Thickening Fluids, Jian Yang, Shuaishuai Sun, Weihua Li, Haiping Du, Gursel Alici, Masami Nakano
Faculty of Engineering and Information Sciences - Papers: Part A
Magnetorheological shear thickening fluid is a smart material that exhibits both magnetorheological and shear thickening effects. This study focuses on the design and development of a novel magnetorheological shear thickening fluid-based linear damper. First, micron-sized carbonyl iron particles, at a 20% and 80% weight fraction, were immersed among the shear thickening fluid base and thoroughly mixed under a high shear condition to produce the magnetorheological shear thickening fluid. Then, a monotube damper with a bypass was designed and fabricated. The testing results using an MTS machine show that the influence of incorporating shear thickening fluid allows the 20% magnetorheological shear …
The Effect Of Geometry And Material Properties On The Performance Of A Small Hydraulic Mckibben Muscle System, Danial Sangian, Sina Naficy, Geoffrey M. Spinks, Bertrand Tondu
The Effect Of Geometry And Material Properties On The Performance Of A Small Hydraulic Mckibben Muscle System, Danial Sangian, Sina Naficy, Geoffrey M. Spinks, Bertrand Tondu
Faculty of Engineering and Information Sciences - Papers: Part A
Fluidic McKibben artificial muscles are one of the most popular biomimetic actuators, showing similar static and dynamic performance to skeletal muscles. In particular, their pneumatic version offers high-generated force, high speed and high strain in comparison to other actuators. This paper investigates the development of a small-size, fully enclosed, hydraulic McKibben muscle powered by a low voltage pump. Hydraulic McKibben muscles with an outside diameter of 6 mm and a length ranging from 35 mm to 80 mm were investigated. These muscles are able to generate forces up to 26 N, strains up to 23%, power to mass of 30 …
In-Situ Formation And Densification Of Mgal2o4-Smalo3 Ceramics By A Single-Stage Reaction Sintering Process, Beiyue Ma, Yue Yin, Qiang Zhu, Ying Li, Guangqiang Li, Jingkun Yu
In-Situ Formation And Densification Of Mgal2o4-Smalo3 Ceramics By A Single-Stage Reaction Sintering Process, Beiyue Ma, Yue Yin, Qiang Zhu, Ying Li, Guangqiang Li, Jingkun Yu
Faculty of Engineering and Information Sciences - Papers: Part A
Stoichiometric magnesium aluminate spinel (MgAl2O4, MA)-samarium aluminate (SmAlO3, SA) ceramics have been prepared at 1580°C for 4h from calcined magnesia (MgO), commercial alumina (Al2O3) and samarium oxide (Sm2O3) by a single-stage in-situ reaction sintering (SIRS) method. The phase compositions, microstructures, shrinkage ratio, bulk density and cold compressive strength of the MA-SA ceramics have been investigated. The ceramics with 2.5 - 7.5 wt. % Sm2O3 are composed of MA and SA phases. The microstructures of the ceramics are dense. MA particles exist as angular …
Validation Of 3dvh Estimated Dvh Metrics For Prostate Vmat Plans, Sankar Arumugam, Aitang Xing, Tony Young, David Thwaites, Lois C. Holloway
Validation Of 3dvh Estimated Dvh Metrics For Prostate Vmat Plans, Sankar Arumugam, Aitang Xing, Tony Young, David Thwaites, Lois C. Holloway
Faculty of Engineering and Information Sciences - Papers: Part A
The accuracy of 3DVH (Sun Nuclear Corporation, USA) reported DVH metrics for target volumes and Organs at Risk (OARs) for two Prostate Volumetric Modulated Arc Therapy (VMAT) plans was studied. The accuracy of 3DVH estimated DVH metrics in the presence of Multi Leaf Collimator (MLC) systematic errors was also tested with error introduced plans calculated in Pinnacle. The results of the study show that the DVH metrics estimated by 3DVH for error-free plans agree with the TPS calculation within 3%. The D95 to PTV was shown to be sensitive in detecting studied MLC errors. However the accuracy of 3DVH estimated …
The Role Of Pyrimidine And Water As Underlying Molecular Constituents For Describing Radiation Damage In Living Tissue: A Comparative Study, Martina C. Fuss, L Ellis-Gibbings, Darryl B. Jones, M J. Brunger, Francisco Blanco, A Muñoz, Paulo Limao-Vieira, Gustavo Garcia
The Role Of Pyrimidine And Water As Underlying Molecular Constituents For Describing Radiation Damage In Living Tissue: A Comparative Study, Martina C. Fuss, L Ellis-Gibbings, Darryl B. Jones, M J. Brunger, Francisco Blanco, A Muñoz, Paulo Limao-Vieira, Gustavo Garcia
Faculty of Engineering and Information Sciences - Papers: Part A
Water is often used as the medium for characterizing the effects of radiation on living tissue. However, in this study, charged-particle track simulations are employed to quantify the induced physicochemical and potential biological implications when a primary ionising particle with energy 10 keV strikes a medium made up entirely of water or pyrimidine. Note that pyrimidine was chosen as the DNA/RNA bases cytosine, thymine, and uracil can be considered pyrimidine derivatives. This study aims to assess the influence of the choice of medium on the charged-particle transport, and identify how appropriate it is to use water as the default medium …
Comparison Of Oncentra ® Brachy Ipsa And Graphical Optimisation Techniques: A Case Study Of Hdr Brachytherapy Head And Neck And Prostate Plans, Michael Jameson, Lucy Ohanessian, Vikneswary Batumalai, Virendra Patel, Lois C. Holloway
Comparison Of Oncentra ® Brachy Ipsa And Graphical Optimisation Techniques: A Case Study Of Hdr Brachytherapy Head And Neck And Prostate Plans, Michael Jameson, Lucy Ohanessian, Vikneswary Batumalai, Virendra Patel, Lois C. Holloway
Faculty of Engineering and Information Sciences - Papers: Part A
There are a number of different dwell positions and time optimisation options available in the Oncentra® Brachy (Elekta Brachytherapy Solutions, Veenendaal, The Netherlands) brachytherapy treatment planning system. The purpose of this case study was to compare graphical (GRO) and inverse planning by simulated annealing (IPSA) optimisation techniques for interstitial head and neck (HN) and prostate plans considering dosimetry, modelled radiobiology outcome and planning time. Four retrospective brachytherapy patients were chosen for this study, two recurrent HN and two prostatic boosts. Manual GRO and IPSA plans were generated for each patient. Plans were compared using dose-volume histograms (DVH) and dose …
Degradation Of A Broad Spectrum Of Trace Organic Contaminants By An Enzymatic Membrane Reactor: Complementary Role Of Membrane Retention And Enzymatic Degradation, Luong N. Nguyen, Faisal I. Hai, William E. Price, Jinguo Kang, Frederic D.L Leusch, Felicity Roddick, Jason P. Van De Merwe, Saleh F. Magram, Long D. Nghiem
Degradation Of A Broad Spectrum Of Trace Organic Contaminants By An Enzymatic Membrane Reactor: Complementary Role Of Membrane Retention And Enzymatic Degradation, Luong N. Nguyen, Faisal I. Hai, William E. Price, Jinguo Kang, Frederic D.L Leusch, Felicity Roddick, Jason P. Van De Merwe, Saleh F. Magram, Long D. Nghiem
Faculty of Engineering and Information Sciences - Papers: Part A
Laccase-catalysed degradation of 30 trace organic contaminants (TrOCs) with diverse chemical structure was investigated in an enzymatic membrane reactor (EMR) equipped with an ultrafiltration membrane. Compared to the results from batch incubation tests, the EMR could facilitate degradation of some phenolic and a number of non-phenolic TrOCs. Laccase, which was completely retained by the membrane, formed a dynamic gel layer on the membrane surface onto which TrOCs were adsorbed. EMR investigations with active and heat-inactivated laccase confirmed that the TrOCs retained by the active laccase gel layer were eventually degraded. Redox-mediator addition to the EMR significantly extended the spectrum of …