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Articles 91 - 120 of 13306

Full-Text Articles in Social and Behavioral Sciences

Proposing A Haptic Approach To Facilitating L2 Learners' Pragmatic Competence, Michael S. Burri, Amanda Ann Baker, William Acton Jan 2019

Proposing A Haptic Approach To Facilitating L2 Learners' Pragmatic Competence, Michael S. Burri, Amanda Ann Baker, William Acton

Faculty of Social Sciences - Papers

Pragmatic competence plays a critical role in successful communication. Pragmatics in the second language classroom has received substantial interest in TESOL, yet teachers often find the teaching of pragmatics challenging. Instruction generally tends to focus on grammar and vocabulary development, even though pragmatics is closely linked to the sound system (i.e., phonology) of the language. An effective method should combine attention to both pragmatic and phonological competence. We propose an integrated approach, drawing on haptic (movement and touch) pronunciation teaching techniques (Acton, Baker, Burri & Teaman, 2013) to facilitate study and uptake of pragmatics in the classroom. In part by ...


Building Conceptual Knowledge Of Fraction Operations Among Pre-Service Teachers: Effect Of A Representation-Based Teaching Approach Within A Teacher Education Program, Elise J. Thurtell, Patricia A. Forrester, Mohan Chinnappan Jan 2019

Building Conceptual Knowledge Of Fraction Operations Among Pre-Service Teachers: Effect Of A Representation-Based Teaching Approach Within A Teacher Education Program, Elise J. Thurtell, Patricia A. Forrester, Mohan Chinnappan

Faculty of Social Sciences - Papers

A deep understanding of fraction concepts and operations is necessary if pre-service teachers (PSTs) are to present the concepts in multiple forms to learners. Such an understanding needs to be grounded in rich conceptual knowledge. In the present study, we explore the development of this understanding by supporting a cohort of 103 PSTs, who had previously demonstrated poor conceptual understanding of fraction concepts and operations, with a Representational Reasoning in Teaching and Learning (RRTL) approach aimed at strengthening their conceptual knowledge. A comparison of pre- and post-test results indicated that participants showed a significant improvement in shifting the balance of ...


Vascular Effects On The Bold Response And The Retinotopic Mapping Of Hv4, H Boyd Taylor, Alexander M. Puckett, Zoey J. Isherwood, Mark M. Schira Jan 2019

Vascular Effects On The Bold Response And The Retinotopic Mapping Of Hv4, H Boyd Taylor, Alexander M. Puckett, Zoey J. Isherwood, Mark M. Schira

Faculty of Social Sciences - Papers

Despite general acceptance that the retinotopic organisation of human V4 (hV4) takes the form of a single, uninterrupted ventral hemifield, measured retinotopic maps of this visual area are often incomplete. Here, we test hypotheses that artefact from draining veins close to hV4 cause inverted BOLD responses that may serve to obscure a portion of the lower visual quarterfield-including the lower vertical meridian-in some hemispheres. We further test whether correcting such responses can restore the 'missing' retinotopic coverage in hV4. Subjects (N = 10) viewed bowtie, ring, drifting bar and full field flash stimuli. Functional EPIs were acquired over approximately 1.5h ...


Estimating Spatial Changes Over Time Of Arctic Sea Ice Using Hidden 2x2 Tables, Bohai Zhang, Noel A. Cressie Jan 2019

Estimating Spatial Changes Over Time Of Arctic Sea Ice Using Hidden 2x2 Tables, Bohai Zhang, Noel A. Cressie

Faculty of Engineering and Information Sciences - Papers: Part B

Arctic sea ice extent has been of considerable interest to scientists in recent years, mainly due to its decreasing temporal trend over the past 20 years. In this article, we propose a hierarchical spatio-temporal generalized linear model for binary Arctic sea-ice-extent data, where statistical dependencies in the data are modeled through a latent spatio-temporal linear mixed effects model. By using a fixed number of spatial basis functions, the resulting model achieves both dimension reduction and non-stationarity for spatial fields at different time points. An EM algorithm is proposed to estimate model parameters, and an empirical-hierarchical-modeling approach is applied to obtain ...


Minimal Hypersurfaces In The Ball With Free Boundary, Glen Wheeler, V.-M Wheeler Jan 2019

Minimal Hypersurfaces In The Ball With Free Boundary, Glen Wheeler, V.-M Wheeler

Faculty of Engineering and Information Sciences - Papers: Part B

In this note we use the strong maximum principle and integral estimates prove two results on minimal hypersurfaces F:Mn→Rn+1 with free boundary on the standard unit sphere. First we show that if F is graphical with respect to any Killing field, then F(Mn) is a flat disk. This result is independent of the topology or number or boundaries. Second, if Mn=Dn is a disk, we show the supremum of the curvature squared on the interior is bounded below by n times the infimum of the curvature on the boundary. These may be combined the give ...


Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang Jan 2019

Superconducting Pair-Breaking Under Intense Sub-Gap Terahertz Radiation, Jie Tian, Jack Zuber, Sunchao Huang, C Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

We study the effect of a strong and low frequency (ω < Δ, the superconducting gap) electrical field on a superconducting state. It is found that the superconducting gap decreases with the field intensity and wavelength. The physical mechanism for this dependence is the multiphoton absorption by a superconducting electron. By constructing the state of a superconducting electron dressed by photons, we determined the dependence of the superconducting gap on E / ω and temperature. We show that the critical temperature is determined by the parameter E / ω which is distinct from that induced by the heating effect. The result is consistent with experimental findings. This result can be applied to study terahertz nonlinear superconducting metamaterials.


Carbon Nanotube Based Fiber Supercapacitor As Wearable Energy Storage, Zan Lu, Raad Raad, Farzad Safaei, Jiangtao Xi, Zhoufeng Liu, Javad Foroughi Jan 2019

Carbon Nanotube Based Fiber Supercapacitor As Wearable Energy Storage, Zan Lu, Raad Raad, Farzad Safaei, Jiangtao Xi, Zhoufeng Liu, Javad Foroughi

Faculty of Engineering and Information Sciences - Papers: Part B

Energy storage is a key requirement for the emerging wearable technologies. Recent progress in this direction includes the development of fiber based batteries and capacitors and even some examples of such fibers incorporated into prototype textiles. Herein we discuss the advantages of using the wet-spinning process to create nanostructured carbon basedmaterials as wearable energy storage. The ability to control the physical, mechanical, electrical, and electrochemical properties of carbon nanotube based fibers holds great promise to develop smart polymeric structure as an energy storing materials including fibers and textiles. This is the first comprehensive review to discuss effect of nanostructured energy ...


High Sensitive Sensing By A Laser Diode With Dual Optical Feedback Operating At Period-One Oscillation, Yuxi Ruan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong Jan 2019

High Sensitive Sensing By A Laser Diode With Dual Optical Feedback Operating At Period-One Oscillation, Yuxi Ruan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong

Faculty of Engineering and Information Sciences - Papers: Part B

Laser dynamics have great potential for various applications, ranging from cryptography to microwave photonics and instrumentation. This letter presents a design for achieving high sensitive sensing and measurement using the dynamics of a laser diode (LD) with a dual external cavity. In the design, one cavity is used to control the dynamics, making the LD operate at the period-one (P1) oscillation state, and the other one is associated with the quantities to be measured. The Lang-Kobayashi equations are modified and solved to develop a bifurcation diagram for the design, from which we determine the P1 state and investigate the sensing ...


Predicted Behavior Of Saturated Granular Waste Blended With Rubber Crumbs, Yujie Qi, Buddhima Indraratna, Matthew Richard Coop Jan 2019

Predicted Behavior Of Saturated Granular Waste Blended With Rubber Crumbs, Yujie Qi, Buddhima Indraratna, Matthew Richard Coop

Faculty of Engineering and Information Sciences - Papers: Part B

Recycling waste materials, such as steel furnace slag (SFS), coal wash (CW), and rubber crumbs (RC) for transport infrastructure is environmentally friendly and offers significant economic benefits. This paper presents a fundamental study of the geotechnical characteristics of this blended matrix (SFSþCWþRC). A semiempirical constitutive model for SFSþCWþRC mixtures is proposed within the framework of critical state (CS) soil mechanics and based on the bounding surface plasticity theory. A CS surface is formulated with the changing RC contents in the waste mixtures, and an experimental relationship between the total work input (Wtotal) and CS parameter (Mcs) is established to capture ...


Comparison Of Butyric Acid Leaching Behaviors Of Zinc From Three Basic Oxygen Steelmaking Filter Cakes, Jingxiu Wang, Zhe Wang, Zhongzhi Zhang, Guangqing Zhang Jan 2019

Comparison Of Butyric Acid Leaching Behaviors Of Zinc From Three Basic Oxygen Steelmaking Filter Cakes, Jingxiu Wang, Zhe Wang, Zhongzhi Zhang, Guangqing Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid concentration and the acid to solid (L/S) stoichiometric ratio were studied, with different optimal leaching conditions obtained. BOS-1 showed the lowest leachability with only less than 10% of zinc removed by 0.5 M acid concentration and 90% of the L/S stoichiometric ratio in 10 h. The best zinc selectivity was achieved with ...


Fault Diagnosis Of Reciprocating Compressor Using Component Estimating Empirical Mode Decomposition And De-Dimension Template With Double-Loop Correction Algorithm, Hongyi Wang, Feng Dong, Xinxiu Zhou, Hongyu Wang, Xinjun Zhu, Limei Song, Qinghua Guo Jan 2019

Fault Diagnosis Of Reciprocating Compressor Using Component Estimating Empirical Mode Decomposition And De-Dimension Template With Double-Loop Correction Algorithm, Hongyi Wang, Feng Dong, Xinxiu Zhou, Hongyu Wang, Xinjun Zhu, Limei Song, Qinghua Guo

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an approach to implement multi-parameter (i.e., pressure, temperature, vibration, current, and liquid level) signals for fault diagnosis of the reciprocating compressor (RC). Due to the complexity of structure and motion of such compressor, the acquired signals involve transient impacts and noises. This causes the useful information to be corrupted and makes it difficult to diagnose the fault patterns accurately. A component estimating empirical mode decomposition (CEEMD) method is proposed to remove the random noise and improve data quality. Furthermore, a new template matching algorithm called de-dimension template with double-loop correction (DDT-DLC) is applied to diagnose the ...


Nonlinear Optical Response Of The Alpha-T-3 Model Due To The Nontrivial Topology Of The Band Dispersion, Lei Chen, Jack Zuber, Zhongshui Ma, C Zhang Jan 2019

Nonlinear Optical Response Of The Alpha-T-3 Model Due To The Nontrivial Topology Of The Band Dispersion, Lei Chen, Jack Zuber, Zhongshui Ma, C Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

We study the electronic contribution to the nonlinear optical response of the α-T3 model. This model is an interpolation between a graphene (α = 0) and dice (α = 1) lattice. Using a second-quantized formalism, we calculate the first- and third-order responses for a range of α and chemical potential values as well as considering a band gap in the first-order case. Conductivity quantization is observed for the first-order, while higher-order harmonic generation is observed in the third-order response with the chemical potential determining which applied field frequencies both quantization and harmonic generation occur at. We observe a range of experimentally accessible ...


Microstructure And Water Distribution In Catalysts For Polymer Electrolyte Fuel Cells, Elucidated By Contrast Variation Small-Angle Neutron Scattering, Satoshi Koizumi, Satoru Ueda, Takumi Inada, Yohei Noda, Robert A. Robinson Jan 2019

Microstructure And Water Distribution In Catalysts For Polymer Electrolyte Fuel Cells, Elucidated By Contrast Variation Small-Angle Neutron Scattering, Satoshi Koizumi, Satoru Ueda, Takumi Inada, Yohei Noda, Robert A. Robinson

Faculty of Engineering and Information Sciences - Papers: Part B

By using small-angle neutron scattering (SANS) reinforced by scanning electron microscopy, the fine structure of catalysts for polymer electrolyte fuel cells has been investigated. The experimental data resulting from contrast variation with mixed light and heavy water (H2O/D2O) are well described by a core-shell model with fluctuations in concentration between water and Nafion. In particular, SANS obtained with the mixed water ratio 30/70, which corresponds to a matching point between mixed water and Nafion, shows a broad scattering maximum, which is attributed to a 5 nm-thick Nafion shell on the surface of the larger carbon particles. After swelling ...


Metamorphic Testing: Testing The Untestable, Sergio Segura, Dave Towey, Zhi Q. Zhou, Tsong Yueh Chen Jan 2019

Metamorphic Testing: Testing The Untestable, Sergio Segura, Dave Towey, Zhi Q. Zhou, Tsong Yueh Chen

Faculty of Engineering and Information Sciences - Papers: Part B

What if we could know that a program is buggy, even if we could not tell whether or not its observed output is correct? This is one of the key strengths of metamorphic testing, a technique where failures are not revealed by checking an individual concrete output, but by checking the relations among the inputs and outputs of multiple executions of the program under test. Two decades after its introduction, metamorphic testing has become a fully-fledged testing technique with successful applications in multiple domains, including online search engines, autonomous machinery, compilers, Web APIs, and deep learning programs, among others. This ...


Mechanical Properties Of Steel, Glass, And Hybrid Fiber Reinforced Reactive Powder Concrete, Atheer Hilal Mahdi Al - Gburi, M Neaz Sheikh, Muhammad N. S Hadi Jan 2019

Mechanical Properties Of Steel, Glass, And Hybrid Fiber Reinforced Reactive Powder Concrete, Atheer Hilal Mahdi Al - Gburi, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

This study examines the properties of fiber-reinforced reactive powder concrete (FR-RPC). Steel fibers, glass fibers, and steel-glass hybrid fibers were used to prepare the FR-RPC. The non-fibrous reactive powder concrete (NF-RPC) was prepared as a reference mix. The proportion of fibers by volume for all FR-RPC mixes was 1.5%. Steel fibers of 13 mm length and 0.2 mm diameter were used to prepare the steel fiber-reinforced RPC (SFR-RPC). Glass fibers of 13 mm length and 1.3 mm diameter were used to prepare the glass fiber-reinforced RPC (GFR-RPC). The hybrid fiber-reinforced RPC (HFR-RPC) was prepared by mixing 0 ...


Coupled Cfd-Dem Modelling Of Mine Dust Dispersion In Underground Roadway, Lihai Tan, Ting X. Ren Jan 2019

Coupled Cfd-Dem Modelling Of Mine Dust Dispersion In Underground Roadway, Lihai Tan, Ting X. Ren

Faculty of Engineering and Information Sciences - Papers: Part B

Dust particles floating inside roadways are characterized by various sizes. However, it is difficult to replicate the dust environment with such factors taken into consideration in laboratory experiments. Fortunately, computational technology provides an alternative way for that. In this study, in order to investigate the movement mechanism of dust with different diameters from heading face in the underground roadway, a three-dimensional CFD-DEM coupling numerical model is presented using the Eulerian-Lagrangian method. A numerical roadway model based on a practical engineering case has been established for the purpose of studying the dust diffusion under single-forced ventilation condition in roadway underground. The ...


A Multi-Center Prospective Study For Implementation Of An Mri-Only Prostate Treatment Planning Workflow, Peter B. Greer, Jarad Martin, Mark Sidhom, Perry Hunter, Peter Pichler, Jae Choi, Leah Best, Joanne Smart, Tony Young, Michael G. Jameson, Tess Afinidad, Chris Wratten, James W. Denham, Lois C. Holloway, Swetha Sridharan, Robba Rai, Gary P. Liney, Parnesh Raniga, Jason A. Dowling Jan 2019

A Multi-Center Prospective Study For Implementation Of An Mri-Only Prostate Treatment Planning Workflow, Peter B. Greer, Jarad Martin, Mark Sidhom, Perry Hunter, Peter Pichler, Jae Choi, Leah Best, Joanne Smart, Tony Young, Michael G. Jameson, Tess Afinidad, Chris Wratten, James W. Denham, Lois C. Holloway, Swetha Sridharan, Robba Rai, Gary P. Liney, Parnesh Raniga, Jason A. Dowling

Faculty of Engineering and Information Sciences - Papers: Part B

Purpose: This project investigates the feasibility of implementation of MRI-only prostate planning in a prospective multi-center study. Method and Materials: A two-phase implementation model was utilized where centers performed retrospective analysis of MRI-only plans for five patients followed by prospective MRI-only planning for subsequent patients. Feasibility was assessed if at least 23/25 patients recruited to phase 2 received MRI-only treatment workflow. Whole-pelvic MRI scans (T2 weighted, isotropic 1.6 mm voxel 3D sequence) were converted to pseudo-CT using an established atlas-based method. Dose plans were generated using MRI contoured anatomy with pseudo-CT for dose calculation. A conventional CT scan ...


Beam-Based Analog Self-Interference Cancellation With Auxiliary Transmit Chains In Full-Duplex Mimo Systems, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y J. Guo Jan 2019

Beam-Based Analog Self-Interference Cancellation With Auxiliary Transmit Chains In Full-Duplex Mimo Systems, Anh Tuyen Le, Le Chung Tran, Xiaojing Huang, Y J. Guo

Faculty of Engineering and Information Sciences - Papers: Part B

Analog domain cancellation has been considered as the most important step to mitigate self-interference (SI) in fullduplex (FD) radios. However, in FD multiple-input multipleoutput (MIMO) systems, this method faces a critical issue of complexity since the number of cancellation circuits increases quadratically with the number of antennas. In this paper, we propose a beam-based radio frequency SI cancellation architecture which uses adaptive filters to significantly reduce the complexity. Data symbols for all the beams are up-converted by auxiliary transmit chains to provide reference signals for all adaptive filters. Hence, the number of cancellation circuits becomes proportional to the number of ...


Consequence Modelling Of Co2 Pipeline Failure, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton Jan 2019

Consequence Modelling Of Co2 Pipeline Failure, Xiong Liu, Ajit R. Godbole, Cheng Lu, Guillaume Michal, Valerie M. Linton

Faculty of Engineering and Information Sciences - Papers: Part B

This paper describes the experimental investigation and Computational Fluid Dynamics (CFD) simulations of the dispersion of CO2 following high-pressure dense phase CO2 pipeline failure. A full-scale burst test was carried out to simulate a CO2 pipeline failure in the real world. The atmospheric dispersion of the CO2 following the explosive release was measured. The CFD models were validated against the experimental data. The models were then used to estimate the consequence distances related to CO2 dispersion following failure of pipelines with various diameters under different wind speeds. This approach provides a predictive formula for the consequence distances of CO2 transmission ...


Moisture Diffusion Measurement And Evaluation For Porous Membranes Used In Enthalpy Exchangers, Ahmed Khafeef Obaid Al-Bdoor, Zhenjun Ma, Paul Cooper Jan 2019

Moisture Diffusion Measurement And Evaluation For Porous Membranes Used In Enthalpy Exchangers, Ahmed Khafeef Obaid Al-Bdoor, Zhenjun Ma, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part B

Air-to-air membrane enthalpy exchangers using semi-permeable membranes are widely used in building ventilation systems to pre-condition the supply air by exchanging energy with the exhaust air stream. Moisture diffusivity is one of the most important properties of porous membranes. This property has a significant influence on the design and performance of membrane enthalpy exchangers. In this study, moisture diffusion resistances of five porous membranes were measured, and the effects of the membrane pore size on the moisture diffusivity were evaluated under different test conditions. The five porous membranes tested included: I) two PVDF (Polyvinylidene difluoride) membranes with mean pore diameters ...


Asthma Management Application For Consumers: Nudging As A Feature, Nawaf Almutairi, Elena Vlahu-Gjorgievska, Khin Than Win Jan 2019

Asthma Management Application For Consumers: Nudging As A Feature, Nawaf Almutairi, Elena Vlahu-Gjorgievska, Khin Than Win

Faculty of Engineering and Information Sciences - Papers: Part B

Asthma is a serious global health problem and can be seen in all age groups and a number of asthma management applications have been created aiming to increase self-management. The aim of this paper is to identify nudging strategy for the asthma management application based on the context awareness. Nudging feature is proposed to increase the self-management, patient engagement, and symptoms control. The final proposed application was implemented from a theoretical perspective.


Ideals Of Steinberg Algebras Of Strongly Effective Groupoids, With Applications To Leavitt Path Algebras, Lisa Orloff Clark, Cain Edie-Mitchell, Astrid An Huef, Aidan Sims Jan 2019

Ideals Of Steinberg Algebras Of Strongly Effective Groupoids, With Applications To Leavitt Path Algebras, Lisa Orloff Clark, Cain Edie-Mitchell, Astrid An Huef, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

We consider the ideal structure of Steinberg algebras over a commutative ring with identity. We focus on Hausdorff groupoids that are strongly effective in the sense that their reductions to closed subspaces of their unit spaces are all effective. For such a groupoid, we completely describe the ideal lattice of the associated Steinberg algebra over any commutative ring with identity. Our results are new even for the special case of Leavitt path algebras; so we describe explicitly what they say in this context, and give two concrete examples.


Improved Performance Of Ballasted Tracks Under Impact Loading By Recycled Rubber Mats, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn Jan 2019

Improved Performance Of Ballasted Tracks Under Impact Loading By Recycled Rubber Mats, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

Ballasted tracks at transition locations such as approaches to bridges and road crossings experience increasing degradation and deformation due to dynamic and high impact forces, a key factor that decreases the stability and longevity of railroads. One solution to minimise ballast degradation at the transition zones is using rubber energy absorbing drainage sheets (READS) manufactured from recycled tyres. When placed beneath the ballast layer, READS distributes the load over wider area and attenuate of the load over a longer duration thus decreasing maximum stress, apart from reducing the energy transferred to the ballast and other substructure components. Subsequently, the track ...


Pullout Behaviour Of Different Types Of Steel Fibres Embedded In Magnesium Phosphate Cementitious Matrix, Hu Feng, M Neaz Sheikh, Muhammad N. S Hadi, Lu Feng, Danying Gao, Jun Zhao Jan 2019

Pullout Behaviour Of Different Types Of Steel Fibres Embedded In Magnesium Phosphate Cementitious Matrix, Hu Feng, M Neaz Sheikh, Muhammad N. S Hadi, Lu Feng, Danying Gao, Jun Zhao

Faculty of Engineering and Information Sciences - Papers: Part B

A series of pullout tests were conducted to investigate the interface bond properties of seven types of steel fibres embedded in the magnesium phosphate cementitious matrix. The micromorphology of the interface transition zone between MPC and different types of fibres was examined by scanning electron microscope. Test results showed that smaller diameter steel fibres with brass coating surface achieved higher average bond strength, higher pullout energy per unit volume and a higher ratio of material use. The end hook deformation provided the mechanical bond locally whereas the deformation along the length of fibre provided the mechanical bond distributed along the ...


A New Standard Dna Damage (Sdd) Data Format, Jan Schuemann, A L. Mcnamara, J Warmenhoven, N Henthorn, K Kirkby, M Merchant, S Ingram, Harald Paganetti, Kathryn D. Held, J Ramos-Mendez, B Faddegon, J Perl, D Goodhead, I Plante, Hans Rabus, Heidi Nettelbeck, W Friedland, P Kundrat, A Ottolenghi, G Baiocco, S Barbieri, M Dingfelder, Sebastien Incerti, Carmen Villagrasa, M Bueno, M A. Bernal, Susanna Guatelli, Dosatsu Sakata, J Brown, Z Francis, Ioanna Kyriakou, N Lampe, F Ballarini, M Carante, M Davidkova, V Stepan, X Jia, F. Cucinotta, Reinhard W. Schulte, R Stewart, David Carlson, S Galer, Zdenka Kuncic, S Lacombe, J Milligan, S Cho, G Sawakuchi, T Inaniwa, T Sato, W Li, Audrey V. Solov'yov, Eugene Surdutovich, M Durante, Kevin M. Prise, Stephen J. Mcmahon Jan 2019

A New Standard Dna Damage (Sdd) Data Format, Jan Schuemann, A L. Mcnamara, J Warmenhoven, N Henthorn, K Kirkby, M Merchant, S Ingram, Harald Paganetti, Kathryn D. Held, J Ramos-Mendez, B Faddegon, J Perl, D Goodhead, I Plante, Hans Rabus, Heidi Nettelbeck, W Friedland, P Kundrat, A Ottolenghi, G Baiocco, S Barbieri, M Dingfelder, Sebastien Incerti, Carmen Villagrasa, M Bueno, M A. Bernal, Susanna Guatelli, Dosatsu Sakata, J Brown, Z Francis, Ioanna Kyriakou, N Lampe, F Ballarini, M Carante, M Davidkova, V Stepan, X Jia, F. Cucinotta, Reinhard W. Schulte, R Stewart, David Carlson, S Galer, Zdenka Kuncic, S Lacombe, J Milligan, S Cho, G Sawakuchi, T Inaniwa, T Sato, W Li, Audrey V. Solov'yov, Eugene Surdutovich, M Durante, Kevin M. Prise, Stephen J. Mcmahon

Faculty of Engineering and Information Sciences - Papers: Part B

Our understanding of radiation-induced cellular damage has greatly improved over the past few decades. Despite this progress, there are still many obstacles to fully understand how radiation interacts with biologically relevant cellular components, such as DNA, to cause observable end points such as cell killing. Damage in DNA is identified as a major route of cell killing. One hurdle when modeling biological effects is the difficulty in directly comparing results generated by members of different research groups. Multiple Monte Carlo codes have been developed to simulate damage induction at the DNA scale, while at the same time various groups have ...


Evolution Of Diamond Based Microdosimetry, Jeremy A. Davis, Marco Petasecca, Susanna Guatelli, Michael L. F Lerch, Anatoly B. Rosenfeld Jan 2019

Evolution Of Diamond Based Microdosimetry, Jeremy A. Davis, Marco Petasecca, Susanna Guatelli, Michael L. F Lerch, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

The requirements for solid state micro- dosimetry particularly within the context of medical and space environments necessitate a tissue equivalent and radiation hard material, for which diamond is uniquely suited. An overview of the current status of diamond based microdosimetry is given. This overview will explore previous and current technologies developed by the Centre for Medical Radiation Physics (CMRP). The overview will analyse technologies in terms of their advantages and disadvantages within the context of microdosimetry. Using this as a basis, recommendations with respect to fabri- cation methodologies/techniques are provided in order to direct the course and progress of ...


Brachyview: Verification Of Ldr Patient Plans - Hardware Optimisation, Taylah Brennen, Dean L. Cutajar, Saree Alnaghy, Joseph A. Bucci, Andrej Bece, Marco Favoino, M Carriero, Michael L. F Lerch, Anatoly B. Rosenfeld, M Petasseca Jan 2019

Brachyview: Verification Of Ldr Patient Plans - Hardware Optimisation, Taylah Brennen, Dean L. Cutajar, Saree Alnaghy, Joseph A. Bucci, Andrej Bece, Marco Favoino, M Carriero, Michael L. F Lerch, Anatoly B. Rosenfeld, M Petasseca

Faculty of Engineering and Information Sciences - Papers: Part B

BrachyView is a novel in-body imaging system developed with the objective to provide real-time intraoperative dosimetry for low dose rate (LDR) prostate brachytherapy treatments. Seed positions can be reconstructed after implantation by the means of a high-resolution pinhole gamma camera. The obtained dataset is then combined with conventional trans-rectal ultrasound (TRUS) imaging to locate the effective source position within the prostate volume. This study presents a comparison of two data sets containing 96 and 98 I-25 brachytherapy sources and readout by two different pin-hole collimators with 800 m and 500 m, respectively. This study aims to assess the effect on ...


Characterization Of A High Spatiotemporal Resolution Monolithic Silicon Strip Detector For Mri-Linac Dosimetry, Trent Causer, Tess Chapman, Bradley M. Oborn, Jeremy A. Davis, Marco Petasecca, Anatoly B. Rosenfeld, Peter E. Metcalfe Jan 2019

Characterization Of A High Spatiotemporal Resolution Monolithic Silicon Strip Detector For Mri-Linac Dosimetry, Trent Causer, Tess Chapman, Bradley M. Oborn, Jeremy A. Davis, Marco Petasecca, Anatoly B. Rosenfeld, Peter E. Metcalfe

Faculty of Engineering and Information Sciences - Papers: Part B

Multiple vendors are now offering real-time MRI-guided radiotherapy systems. Quality assurance of small fields delivered with an MR-RT system requires detectors with high spatiotemporal resolution, and magnetic insensitivity. High spatial resolution is required to characterise the asymmetric penumbra that transverse designs demonstrate. In this work the authors describe the characterisation of the dosimetric performance of a monolithic silicon strip detector mounted to a flexible polymide (Kapton) printed circuit board intended for use in MRI-linac dosimetry.


Sabr In Clinical Trials: What Quality Assurance (Qa) Is Required And How Can It Be Done?, Tomas Kron, Nicholas G. Hardcastle Jan 2019

Sabr In Clinical Trials: What Quality Assurance (Qa) Is Required And How Can It Be Done?, Tomas Kron, Nicholas G. Hardcastle

Faculty of Engineering and Information Sciences - Papers: Part B

Stereotactic Ablative Body Radiotherapy (SABR) has become widely used radiotherapy treatment modality for many indications ranging from early stage disease to an oligometastatic setting. All this combines the use of virtually all technological advances that characterise modern radiotherapy from small conformal fields to intensity modulation and explicit accounting for motion. However, given its novelty, clinical evidence for SABR is still emerging and many clinical trails include SABR as the intervention to define (eg in dose or fractionation defining studies) or to test against other treatment modalities. In any case, physical quality assurance (QA) must be an essential aspect of the ...


Modulation Of Terahertz Radiation From Graphene Surface Plasmon Polaritons Via Surface Acoustic Wave, Sichen Jin, Xinke Wang, Peng Han, Wenfeng Sun, Shengfei Feng, Jiasheng Ye, C Zhang, Yan Zhang Jan 2019

Modulation Of Terahertz Radiation From Graphene Surface Plasmon Polaritons Via Surface Acoustic Wave, Sichen Jin, Xinke Wang, Peng Han, Wenfeng Sun, Shengfei Feng, Jiasheng Ye, C Zhang, Yan Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

We present a theoretical study of terahertz (THz) radiation induced by surface plasmon polaritons (SPPs) on a graphene layer under modulation by a surface acoustic wave (SAW). In our gedanken experiment, SPPs are excited by an electron beam moving on a graphene layer situated on a piezoelectric MoS 2 flake. Under modulation by the SAW field, charge carriers are periodically distributed over the MoS 2 flake, and this causes periodically distributed permittivity. The periodic permittivity structure of the MoS 2 flake folds the SPP dispersion curve back into the center of the first Brillouin zone, in a manner analogous to ...