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Articles 2581 - 2610 of 14358

Full-Text Articles in Social and Behavioral Sciences

Self-Reported Nutrition Education Received By Australian Midwives Before And After Registration, Jamila Arrish, Heather Yeatman, Moira J. Williamson Jan 2017

Self-Reported Nutrition Education Received By Australian Midwives Before And After Registration, Jamila Arrish, Heather Yeatman, Moira J. Williamson

Faculty of Social Sciences - Papers (Archive)

Educating midwives to provide nutrition advice is essential. Limited research focuses on midwives' nutrition education. This paper explores self-reported nutrition education received by Australian midwives before and after registration. It draws on quantitative and qualitative data from a larger online survey conducted with the members of the Australian College of Midwives (response rate = 6.9%, n=329). Descriptive and content analyses were used. Of the midwives, 79.3% (n=261) reported receiving some nutrition education during, before, and/or after registration. However, some described this coverage as limited. It lacked sufficient focus on topics such as weight management, nutrition assessment, and nutrition for vulnerable …

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Anthropocene And Planetary Boundaries, Noel Castree Jan 2017

Anthropocene And Planetary Boundaries, Noel Castree

Faculty of Social Sciences - Papers (Archive)

No abstract provided.

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Perceived Public Transport Infrastructure Modifies The Association Between Public Transport Use And Mental Health: Multilevel Analyses From The United Kingdom, Xiaoqi Feng, Zhiqiang Feng, Thomas E. Astell-Burt Jan 2017

Perceived Public Transport Infrastructure Modifies The Association Between Public Transport Use And Mental Health: Multilevel Analyses From The United Kingdom, Xiaoqi Feng, Zhiqiang Feng, Thomas E. Astell-Burt

Faculty of Social Sciences - Papers (Archive)

Aims Investments to promote public transport utilisation are being championed to achieve sustainable development, but the potential co-benefits for mental health are comparatively under-researched. We hypothesised that frequent users of public transport would be more likely to have better mental health (possibly due to increased levels of physical activity), but among the more frequent users, less favourable perceptions of public transport infrastructure (PPTI) could have a negative influence on mental health. Methods Multilevel linear and logistic regressions were fitted on 30,214 participants in the UK Household Longitudinal Study with lagged PPTI and confounder measures at baseline and indicators of active …

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Muscular Fitness And Metabolic And Inflammatory Biomarkers In Adolescents: Results From Labmed Physical Activity Study, Cesar A. Agostinis-Sobrinho, Carla Moreira, Sandra Abreu, Luis Lopes, Luis B. Sardinha, Jose Oliveira-Santos, Andre Oliveira, Jorge Mota, Rute Santos Jan 2017

Muscular Fitness And Metabolic And Inflammatory Biomarkers In Adolescents: Results From Labmed Physical Activity Study, Cesar A. Agostinis-Sobrinho, Carla Moreira, Sandra Abreu, Luis Lopes, Luis B. Sardinha, Jose Oliveira-Santos, Andre Oliveira, Jorge Mota, Rute Santos

Faculty of Social Sciences - Papers (Archive)

This study aimed to evaluate the associations between muscular fitness and inflammatory biomarkers and to investigate the relationship between muscular fitness and selected clustered inflammatory biomarkers in adolescents. This is a cross-sectional analysis with 529 adolescents (267 girls) aged 12-18 years. Handgrip strength and standing long jump tests assessed MF. Continuous scores of clustered inflammatory biomarkers (sum of Z-scores of C-reactive protein [CRP], C3, C4, fibrinogen, and leptin); metabolic risk factor (MRF) score (sum of Z-scores of SBP, triglycerides, ratio total cholesterol [TC]/HDL, HOMA-IR, and waist circumference [WC]) were computed. Regression analyses showed an inverse association between muscular fitness score …

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Further Examining The Relationship Between Mental Toughness And Dispositional Flow In Sport: A Mediation Analysis, Patricia C. Jackman, Lee Crust, Christian F. Swann Jan 2017

Further Examining The Relationship Between Mental Toughness And Dispositional Flow In Sport: A Mediation Analysis, Patricia C. Jackman, Lee Crust, Christian F. Swann

Faculty of Social Sciences - Papers (Archive)

The purpose of the study was to further examine the relationship between mental toughness (MT) and dispositional flow in sport. A sample of 256 athletes (M age = 23.65 years, SD = 5.43), competing at international (n = 59), national (n = 77), and club/university (n = 120) levels completed questionnaires assessing MT and dispositional flow. A significant and positive correlation was found between MT and dispositional flow (r = 0.50, p < 0.001). Mediation analysis revealed that MT had a significant direct effect on the flow dimensions of challenge-skills balance, clear goals, unambiguous feedback, sense of control and concentration on the task at hand, and significant indirect effects on concentration on the task at hand, sense of control, loss of self-consciousness, action-awareness merging and autotelic experience. Findings suggest that MT has direct and indirect effects on the characteristics of flow, offering new insights regarding optimal human functioning

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Childcare Educators' Perceptions Of And Solutions To Reducing Sitting Time In Young Children: A Qualitative Study, Yvonne Ellis, Dylan P. Cliff, Anthony D. Okely Jan 2017

Childcare Educators' Perceptions Of And Solutions To Reducing Sitting Time In Young Children: A Qualitative Study, Yvonne Ellis, Dylan P. Cliff, Anthony D. Okely

Faculty of Social Sciences - Papers (Archive)

Young children spend a high proportion of their time at childcare sitting. Reducing sitting time or breaking up prolonged periods of sitting may be positively associated with health outcomes among children. The purpose of this study was to identify childcare educators¿ perceptions of what environmental and policy modifications could be made within early childhood education and care (ECEC) settings to reduce sitting time among children during childcare. Eighty-seven educators from 11 ECEC centres participated in 11 focus groups between September 2013 and November 2013. Each focus group was audio-recorded and transcribed verbatim. A semi-structured schedule was developed to investigate the …

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Patient, General Practitioner And Oncologist Views Regarding Long-Term Cancer Shared Care, Heike Schutze, Melvin Chin, David Weller, Mark Fort Harris Jan 2017

Patient, General Practitioner And Oncologist Views Regarding Long-Term Cancer Shared Care, Heike Schutze, Melvin Chin, David Weller, Mark Fort Harris

Faculty of Social Sciences - Papers (Archive)

Background The rising incidence of cancer and increasing number of cancer survivors place competing demands on specialist oncology clinics. This has led to a need to consider collaborative care between primary and secondary care for the long-term post-treatment care of cancer survivors. Objective To explore the views of breast and colorectal cancer survivors, their oncologist and GP about GPs taking a more active role in long-term cancer follow-up care. Methods Semi-structured interviews using a thematic analysis framework. Respondents were asked their views on the specialist hospital-based model for cancer follow-up care and their views on their GP taking a greater …

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Don't Ignore The Mobility Scooter. It May Just Be The Future Of Transport, Thomas Birtchnell, Gordon R. Waitt, Theresa Harada Jan 2017

Don't Ignore The Mobility Scooter. It May Just Be The Future Of Transport, Thomas Birtchnell, Gordon R. Waitt, Theresa Harada

Faculty of Social Sciences - Papers (Archive)

Are mobility scooters harbingers of a future where small and versatile electric vehicles roam our cities?

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The Oscillating Potential Model Of Visually Induced Vection, Takeharu Seno, Ken-Ichi Sawai, Hidetoshi Kanaya, Toshihiro Wakebe, Masaki Ogawa, Yoshitaka Fujii, Stephen Palmisano Jan 2017

The Oscillating Potential Model Of Visually Induced Vection, Takeharu Seno, Ken-Ichi Sawai, Hidetoshi Kanaya, Toshihiro Wakebe, Masaki Ogawa, Yoshitaka Fujii, Stephen Palmisano

Faculty of Social Sciences - Papers (Archive)

2017, The Author(s) 2017. Visually induced illusions of self-motion are often referred to as vection. This article developed and tested a model of responding to visually induced vection. We first constructed a mathematical model based on well-documented characteristics of vection and human behavioral responses to this illusion. We then conducted 10,000 virtual trial simulations using this Oscillating Potential Vection Model (OPVM). OPVM was used to generate simulated vection onset, duration, and magnitude responses for each of these trials. Finally, we compared the properties of OPVM's simulated vection responses with real responses obtained in seven different laboratory-based vection experiments. The OPVM …

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Applying The Genetic Algorithm For Determination Electrospinning Parameters Of Poly Vinylidene Fluoride (Pvdf) Nano Fibers: Theoretical & Experimental Analysis, Fatemeh Mokhtari, Masoud Latifi, Mahnaz Shamshirsaz Jan 2017

Applying The Genetic Algorithm For Determination Electrospinning Parameters Of Poly Vinylidene Fluoride (Pvdf) Nano Fibers: Theoretical & Experimental Analysis, Fatemeh Mokhtari, Masoud Latifi, Mahnaz Shamshirsaz

Faculty of Engineering and Information Sciences - Papers: Part B

Poly Vinylidene Fluoride (PVDF) because of its piezoelectric properties has been applied in different applications such as smart textiles, medical application and membranes for energy harvesting. It was declared that nanofibres diameters and electrospinning parameters could be enhanced the piezoelectric properties of these materials. The main objective of this paper is applying the Genetic Algorithm (GA) to determine the optimum condition of solution parameters and processing conditions based on the desired diameter size of PVDF fibers to produce the fibers without any structural faults. In this method, The Fitness function was determined by a simple analytical model presented by Fridrikh. …

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Stir Casting Process For Manufacture Of Al-Sic Composites, Shahin Soltani, R Azari Khosroshahi, R Taherzadeh Mousavian, Zhengyi Jiang, Alireza Fadavi Boostani, D Brabazon Jan 2017

Stir Casting Process For Manufacture Of Al-Sic Composites, Shahin Soltani, R Azari Khosroshahi, R Taherzadeh Mousavian, Zhengyi Jiang, Alireza Fadavi Boostani, D Brabazon

Faculty of Engineering and Information Sciences - Papers: Part A

Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the composites. In this study, micron-sized SiC particles were used as reinforcement to fabricate Al-3 wt% SiC composites at two casting temperatures (680 and 850 °C) and stirring periods (2 and 6 min). Factors of reaction at matrix/ceramic interface, porosity, ceramic incorporation, and agglomeration of the particles were evaluated by scanning electron microscope (SEM) and high-resolution transition electron microscope (HRTEM) studies. From microstructural characterizations, it is concluded that the shorter stirring …

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Sharing Social Network Data: Differentially Private Estimation Of Exponential Family Random-Graph Models, Vishesh Karwa, Pavel N. Krivitsky, Aleksandra B. Slavkovic Jan 2017

Sharing Social Network Data: Differentially Private Estimation Of Exponential Family Random-Graph Models, Vishesh Karwa, Pavel N. Krivitsky, Aleksandra B. Slavkovic

Faculty of Engineering and Information Sciences - Papers: Part A

Motivated by a real life problem of sharing social network data that contain sensitive personal information, we propose a novel approach to release and analyse synthetic graphs to protect privacy of individual relationships captured by the social network while maintaining the validity of statistical results. A case-study using a version of the Enron e-mail corpus data set demonstrates the application and usefulness of the proposed techniques in solving the challenging problem of maintaining privacy and supporting open access to network data to ensure reproducibility of existing studies and discovering new scientific insights that can be obtained by analysing such data. …

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Anonymous Announcement System (Aas) For Electric Vehicle In Vanets, Man Ho Au, Joseph K. Liu, Zhenfei Zhang, Willy Susilo, Jin Li, Jianying Zhou Jan 2017

Anonymous Announcement System (Aas) For Electric Vehicle In Vanets, Man Ho Au, Joseph K. Liu, Zhenfei Zhang, Willy Susilo, Jin Li, Jianying Zhou

Faculty of Engineering and Information Sciences - Papers: Part A

Vehicular Ad Hoc Network (VANET) allows vehicles to exchange information about road and traffic conditions through wireless communications. Nevertheless, providing reliable and authenticated information without violating the user's privacy seems contradictory. In this paper, we propose an Anonymous Announcement System especially designed for Electric Vehicle (EV) in VANETs to achieve the aforementioned contradictory goals. We demonstrated the feasibility of the protocol with a prototype implementation on a suitable device and a network simulation with our protocol added on top of a normal VANET.

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Low Voltage Ride-Through Enhancement Of Dfig-Based Wind Turbine Using Dc Link Switchable Resistive Type Fault Current Limiter, Seyed Behzad Naderi, Michael Negnevitsky, Amin Jalilian, Mehrdad Tarafdar Hagh, Kashem M. Muttaqi Jan 2017

Low Voltage Ride-Through Enhancement Of Dfig-Based Wind Turbine Using Dc Link Switchable Resistive Type Fault Current Limiter, Seyed Behzad Naderi, Michael Negnevitsky, Amin Jalilian, Mehrdad Tarafdar Hagh, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part A

Doubly-fed induction generator (DFIG)-based wind turbines utilise small-scale voltage sourced converters with a limited overcurrent withstand capability, which makes the DFIG-based wind turbines very vulnerable to grid faults. Often, modern DFIG systems employ a crowbar protection at the rotor circuit to protect the rotor side converter (RSC) during grid faults. This method converts the DFIG to a squirrel cage induction generator, which does not comply with the new grid codes. The recent grid codes need wind turbines to stay connected to the utility grid during and after power system faults, especially in high penetration level of wind power. Furthermore, the …

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Flexural Behaviour Of Gfrp Reinforced High Strength And Ultra High Strength Concrete Beams, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh Jan 2017

Flexural Behaviour Of Gfrp Reinforced High Strength And Ultra High Strength Concrete Beams, Matthew Goldston, Alex M. Remennikov, M Neaz Sheikh

Faculty of Engineering and Information Sciences - Papers: Part A

FRP bars are considered alternatives to steel bars for reinforcing concrete structures in harsh environments. FRP bars are non-corrosive, light weight, non-magnetic and have high longitudinal strength and low thermal and electric conductivity. This paper experimentally investigated the flexural behaviour of high strength concrete (HSC) and ultra-high strength concrete (UHSC) beams reinforced with glass fiber reinforced polymer (GFRP) bars that has not been addressed in the literature before. Beams of 2400 mm long, 100 mm wide and 150 mm high were tested under quasi-static loading (three point loading). Influence of reinforcement ratio and compressive strength of concrete (HSC and UHSC) …

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Micromechanics-Based Investigation Of Fouled Ballast Using Large-Scale Triaxial Tests And Discrete Element Modeling, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn Jan 2017

Micromechanics-Based Investigation Of Fouled Ballast Using Large-Scale Triaxial Tests And Discrete Element Modeling, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part A

Railway ballast comprises unbounded discrete grains that are often used to form a load-bearing platform for tracks. Ballast degradation as trains pass over the tracks and infiltration of external fines including slurried (pumped) fine subgrade soils are two of the main reasons for ballast fouling. Fouling causes tracks to settle and also reduces the load-bearing capacity, which is associated with a reduction in internal friction and increased lateral spreading of the ballast layer. This paper presents a study of mobilized friction angle, volumetric behavior, and associated evolutions of contact and fabric anisotropy of fouled ballast subjected to monotonic triaxial loading …

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Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper Jan 2017

Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

This paper describes the development, implementation and experimental investigation of a Hybrid Model Predictive Control (HMPC) strategy to control solar-assisted heating, ventilation and air-conditioning (HVAC) systems with on-site thermal energy generation and storage. A comprehensive approach to the thermal energy management of a residential building is presented to optimise the scheduling of the available thermal energy resources to meet a comfort objective. The system has a hybrid nature with both continuous variables and discrete, logic-driven operating modes. The proposed control strategy is organized in two hierarchical levels. At the high-level, an HMPC controller with a 24-h prediction horizon and a …

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Displaced Hardness Peak Phenomenon In Heat-Affected Zone Of Welded Quenched And Tempered Em812 Steel, Druce P. Dunne, W Pang Jan 2017

Displaced Hardness Peak Phenomenon In Heat-Affected Zone Of Welded Quenched And Tempered Em812 Steel, Druce P. Dunne, W Pang

Faculty of Engineering and Information Sciences - Papers: Part A

Investigations of microstructural and hardness gradients in the heat-affected zone (HAZ) of quenched and tempered (Q&T) steels have indicated that peak hardness does not occur in the grain-coarsened heat-affected zone (GCHAZ) adjacent to the fusion boundary, which is typical of ferritic steels, but corresponds more closely to the grain-refined region (GRHAZ). This phenomenon, the displaced hardness peak (DHP) effect, is considered to arise when the hardenability of the steel is high enough to result in the same microstructure in the GC and GR heat-affected zones, except for significant refinement of the microstructure of the GRHAZ, which increases the hardness and …

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A Decomposition Approach Via Fourier Sine Transform For Valuing American Knock-Out Options With Rebates, Nhat Tan Le, Duy-Minh Dang, Tran Vu Khanh Jan 2017

A Decomposition Approach Via Fourier Sine Transform For Valuing American Knock-Out Options With Rebates, Nhat Tan Le, Duy-Minh Dang, Tran Vu Khanh

Faculty of Engineering and Information Sciences - Papers: Part A

We present an innovative decomposition approach for computing the price and the hedging parameters of American knock-out options with a time-dependent rebate. Our approach is built upon: (i) the Fourier sine transform applied to the partial differential equation with a finite time-dependent spatial domain that governs the option price, and (ii) the decomposition technique that partitions the price of the option into that of the European counterpart and an early exercise premium. Our analytic representations can generalize a number of existing decomposition formulas for some European-style and American-style options. A complexity analysis of the method, together with numerical results, show …

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Optical Dispersive Shock Waves In Defocusing Colloidal Media, Xin An, Timothy R. Marchant, Noel F. Smyth Jan 2017

Optical Dispersive Shock Waves In Defocusing Colloidal Media, Xin An, Timothy R. Marchant, Noel F. Smyth

Faculty of Engineering and Information Sciences - Papers: Part A

The propagation of an optical dispersive shock wave, generated from a jump discontinuity in light intensity, in a defocusing colloidal medium is analysed. The equations governing nonlinear light propagation in a colloidal medium consist of a nonlinear Schrödinger equation for the beam and an algebraic equation for the medium response. In the limit of low light intensity, these equations reduce to a perturbed higher order nonlinear Schrödinger equation. Solutions for the leading and trailing edges of the colloidal dispersive shock wave are found using modulation theory. This is done for both the perturbed nonlinear Schrödinger equation and the full colloid …

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Stacking Fault Tetrahedron Induced Plasticity In Copper Single Crystal, Liang Zhang, Cheng Lu, Anh Kiet Tieu, Lihong Su, Xing Zhao, Linqing Pei Jan 2017

Stacking Fault Tetrahedron Induced Plasticity In Copper Single Crystal, Liang Zhang, Cheng Lu, Anh Kiet Tieu, Lihong Su, Xing Zhao, Linqing Pei

Faculty of Engineering and Information Sciences - Papers: Part A

Stacking fault tetrahedron (SFT) is the most common type of vacancy clustered defects in fcc metals and alloys, and can play an important role in the mechanical properties of metallic materials. In this study, molecular dynamics (MD) simulations were carried out to investigate the incipience of plasticity and the underlying atomic mechanisms in copper single crystals with SFT. Different deformation mechanisms of SFT were reported due to the crystal orientations and loading directions (compression and tension). The results showed that the incipient plasticity in crystals with SFT resulted from the heterogeneous dislocation nucleation from SFT, so the stress required for …

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A Framework To Assess Newmark-Type Simplified Methods For Evaluation Of Earthquake-Induced Deformation Of Embankments, Mojtaba E. Kan, Hossein Taiebat, Mahdi Taiebat Jan 2017

A Framework To Assess Newmark-Type Simplified Methods For Evaluation Of Earthquake-Induced Deformation Of Embankments, Mojtaba E. Kan, Hossein Taiebat, Mahdi Taiebat

Faculty of Engineering and Information Sciences - Papers: Part A

The simplified procedures for evaluation of the earthquake induced displacement in earth and rockfill dams are widely used in practice. These methods are simple, inexpensive, and substantially less time consuming as compared to the complicated stress-deformation approaches. They are especially recommended to be used as a screening tool, to identify embankments with marginal factor of safety, assuming that these methods always give conservative estimates of settlements. However recent studies show that application of these methods may not be conservative in some cases, especially when the tuning ratio of a dam is within a certain range. In this paper the fundamental …

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Direct Immobilization Of Laccase On Titania Nanoparticles From Crude Enzyme Extracts Of P. Ostreatus Culture For Micro-Pollutant Degradation, Chao Ji, Ngoc Luong Nguyen, Jingwei Hou, Faisal I. Hai, Vicki Chen Jan 2017

Direct Immobilization Of Laccase On Titania Nanoparticles From Crude Enzyme Extracts Of P. Ostreatus Culture For Micro-Pollutant Degradation, Chao Ji, Ngoc Luong Nguyen, Jingwei Hou, Faisal I. Hai, Vicki Chen

Faculty of Engineering and Information Sciences - Papers: Part A

Enzymatic treatment can effectively degrade recalcitrant micro-pollutants in wastewater. However, its industrial application is constrained by the high cost of the purified enzyme preparations. This work introduces a novel technique to directly immobilize the in-house crude enzyme extracts (from P. ostreatus) onto the functionalized TiO2 nanoparticle surface. Comprehensive investigations were carried out to understand the interactions between complex crude enzyme extracts and the immobilization support. By simple dilution of the crude enzyme extract, the immobilization efficiency can be significantly improved. The resultant biocatalytic nanoparticles had comparable performance to the immobilized purified commercial enzymes. Finally, the micropollutant degradation capability …

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More Mixed Volume Preserving Curvature Flows, James A. Mccoy Jan 2017

More Mixed Volume Preserving Curvature Flows, James A. Mccoy

Faculty of Engineering and Information Sciences - Papers: Part A

We extend the results of McCoy (Calc Var Partial Differ Equ 24:131-154, 2005) to include several new cases where convex surfaces evolve to spheres under mixed volume preserving curvature flows, using recent results for unconstrained curvature flows and new regularity arguments in the constrained flow setting. We include results for speeds that are degree 1 homogeneous in the principal curvatures and indicate how, with sufficient curvature pinching conditions on the initial hypersurfaces, some results may be extended to speed homogeneous of degree α>1. In particular, these extensions require lower speed bounds that are obtained here without using estimates for …

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A Robust And Tuneable Mid-Infrared Optical Switch Enabled By Bulk Dirac Fermions, Chunhui Zhu, Fengqiu Wang, Yafei Meng, Xiang Yuan, Faxian Xiu, Hongyu Luo, Yazhou Wang, Jianfeng Li, Xinjie Lv, Liang He, Yongbing Xu, Junfeng Liu, C Zhang, Yi Shi, Rong Zhang, Shining Zhu Jan 2017

A Robust And Tuneable Mid-Infrared Optical Switch Enabled By Bulk Dirac Fermions, Chunhui Zhu, Fengqiu Wang, Yafei Meng, Xiang Yuan, Faxian Xiu, Hongyu Luo, Yazhou Wang, Jianfeng Li, Xinjie Lv, Liang He, Yongbing Xu, Junfeng Liu, C Zhang, Yi Shi, Rong Zhang, Shining Zhu

Faculty of Engineering and Information Sciences - Papers: Part A

Pulsed lasers operating in the mid-infrared (3–20 μm) are important for a wide range of applications in sensing, spectroscopy, imaging and communications. Despite recent advances with mid-infrared gain platforms, the lack of a capable pulse generation mechanism remains a significant technological challenge. Here we show that bulk Dirac fermions in molecular beam epitaxy grown crystalline Cd3As2, a three-dimensional topological Dirac semimetal, constitutes an exceptional ultrafast optical switching mechanism for the mid-infrared. Significantly, we show robust and effective tuning of the scattering channels of Dirac fermions via an element doping approach, where photocarrier relaxation times are found …

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New Silicon Microdosimetry Probes For Rbe And Biological Dose Studies Using Stationary And Movable Targets In 12C Ion Therapy, Lachlan Chartier, Linh T. Tran, David Bolst, Alex Pogossov, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Vladimir Perevertaylo, Michael A. Jackson, Naruhiro Matsufuji, Anatoly B. Rosenfeld Jan 2017

New Silicon Microdosimetry Probes For Rbe And Biological Dose Studies Using Stationary And Movable Targets In 12C Ion Therapy, Lachlan Chartier, Linh T. Tran, David Bolst, Alex Pogossov, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Vladimir Perevertaylo, Michael A. Jackson, Naruhiro Matsufuji, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

Due to the high LET and dense ionisation tracks associated with ions, microdosimetric approaches have been used in carbon ion therapy to assess field quality and calculate radiobiological quantities for a variety of cell lines. There is however a lack of instrumentation for simple and routine use in a clinical environment, important for determination of RBE which provides accurate treatment planning and delivery in hadron therapy. In this study, a 10 μm thick silicon microdosimeter with 3D sensitive volumes has been used to investigate the effect of motion on the RBE and field quality of a typical 12C ion …

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Introducing Dynamic Dosimaging: Potential Applications For Mri-Linac, Peter E. Metcalfe, Sarah Alnaghy, Matthew Newall, Maegan Gargett, Mitchell Duncan, Gary P. Liney, Jarrad Begg, Bradley M. Oborn, Marco Petasecca, Michael L. F Lerch, Anatoly B. Rosenfeld Jan 2017

Introducing Dynamic Dosimaging: Potential Applications For Mri-Linac, Peter E. Metcalfe, Sarah Alnaghy, Matthew Newall, Maegan Gargett, Mitchell Duncan, Gary P. Liney, Jarrad Begg, Bradley M. Oborn, Marco Petasecca, Michael L. F Lerch, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

The new era of intra-fraction dose tracking in radiation therapy delivery demands new dosimetry methods, whereby a moving frame of reference as a function of time may be required. This introduces a new paradigm into radiation therapy dose verification. The term we propose to describe this is dynamic dosimaging, which by our definition is tracking the location of a dosimeter array in real time during on-line radiation dose acquisition.

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Nonlinear Analysis Of Biaxially Loaded Rectangular Concrete-Filled Stainless Steel Tubular Slender Beam-Columns, Vipulkumar I. Patel, Qing Quan Liang, Muhammad N. S Hadi Jan 2017

Nonlinear Analysis Of Biaxially Loaded Rectangular Concrete-Filled Stainless Steel Tubular Slender Beam-Columns, Vipulkumar I. Patel, Qing Quan Liang, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part A

Rectangular concrete-filled stainless steel tubular (CFSST) beam-columns utilized as supporting members for building frames may experience axial compression and biaxial moments. A numerical simulation considering the local buckling effects for thin-walled rectangular CFSST slender beam-columns has not been performed. This paper reports a stability modeling on the structural characteristics of rectangular CFSST slender beam-columns accounting for different strain-hardening of stainless steel under tension and compression. The influences of local buckling are considered in the simulation utilizing the existing effective width formulations. The developed numerical model simulates the strength interaction and load-deflection behavior of CFSST slender beam-columns. Comparisons of computed results …

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Correction Factors To Convert Microdosimetry Measurements In Silicon To Tissue In 12C Ion Therapy, David Bolst, Susanna Guatelli, Linh T. Tran, Lachlan Chartier, Michael L. F Lerch, Naruhiro Matsufuji, Anatoly B. Rosenfeld Jan 2017

Correction Factors To Convert Microdosimetry Measurements In Silicon To Tissue In 12C Ion Therapy, David Bolst, Susanna Guatelli, Linh T. Tran, Lachlan Chartier, Michael L. F Lerch, Naruhiro Matsufuji, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part A

Silicon microdosimetry is a promising technology for heavy ion therapy (HIT) quality assurance, because of its sub-mm spatial resolution and capability to determine radiation effects at a cellular level in a mixed radiation field. A drawback of silicon is not being tissue-equivalent, thus the need to convert the detector response obtained in silicon to tissue. This paper presents a method for converting silicon microdosimetric spectra to tissue for a therapeutic 12C beam, based on Monte Carlo simulations. The energy deposition spectra in a 10 μm sized silicon cylindrical sensitive volume (SV) were found to be equivalent to those …

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Model-Based Optimization Of Ground Source Heat Pump Systems, Zhenjun Ma, Lei Xia Jan 2017

Model-Based Optimization Of Ground Source Heat Pump Systems, Zhenjun Ma, Lei Xia

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the development of an optimization strategy for ground source heat pump (GSHP) systems equipped with variable speed pumps in the ground loop system. The optimization problem is formulated using a model-based approach, in which the component models are used to estimate the system performance under various trial settings and an exhaustive search method is used to identify the optimal settings under the search ranges defined. The variable optimized is the outlet water temperature from the ground heat exchangers, which can be used as a set-point to control the operation of the variable speed pumps in the ground …

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