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2020

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Validity And Reliability Of Methods To Determine Barbell Displacement In Heavy Back Squats: Implications For Velocity-Based Training, Brendyn B. Appleby, Harry Banyard, Prue Cormie, Stuart J. Cormack, Robert U. Newton Jan 2020

Validity And Reliability Of Methods To Determine Barbell Displacement In Heavy Back Squats: Implications For Velocity-Based Training, Brendyn B. Appleby, Harry Banyard, Prue Cormie, Stuart J. Cormack, Robert U. Newton

Research outputs 2014 to 2021

The purpose of this study was to investigate the validity and reliability of methods for determining barbell displacement during heavy back squats. Twelve well-trained rugby union players (mean ± SD 1 repetition maximum [1RM] 90° squat = 196.3 ± 29.2 kg) completed 2 sets of 2 repetitions at 70, 80, and 90% of 1RM squats. Barbell displacement was derived from 3 methods across 4 load categories (120–129, 140–149, 160–169, and 180–189 kg) including: a (a) linear position transducer (LPT) attached 65 cm left of barbell center, (b) 3D motion analysis tracking of markers attached to either end of a barbell, …

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Optimization And Modeling Of Process Parameters In Multi-Hole Simultaneous Drilling Using Taguchi Method And Fuzzy Logic Approach, Muhammad Aamir, Shanshan Tu, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar Jan 2020

Optimization And Modeling Of Process Parameters In Multi-Hole Simultaneous Drilling Using Taguchi Method And Fuzzy Logic Approach, Muhammad Aamir, Shanshan Tu, Majid Tolouei-Rad, Khaled Giasin, Ana Vafadar

Research outputs 2014 to 2021

In industries such as aerospace and automotive, drilling many holes is commonly required to assemble different structures where machined holes need to comply with tight geometric tolerances. Multi-spindle drilling using a poly-drill head is an industrial hole-making approach that allows drilling several holes simultaneously. Optimizing process parameters also improves machining processes. This work focuses on the optimization of drilling parameters and two drilling processes-namely, one-shot drilling and multi-hole drilling-using the Taguchi method. Analysis of variance and regression analysis was implemented to indicate the significance of drilling parameters and their impact on the measured responses i.e., surface roughness and hole size. …

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Leak Location Based On Pds-Vmd Of Leakage-Induced Vibration Signal Under Low Snr In Water-Supply Pipelines, Shuaiyong Li, Chuanqiang Xia, Zhenhua Cheng, Weipei Mao, Ying Liu, Daryoush Habibi Jan 2020

Leak Location Based On Pds-Vmd Of Leakage-Induced Vibration Signal Under Low Snr In Water-Supply Pipelines, Shuaiyong Li, Chuanqiang Xia, Zhenhua Cheng, Weipei Mao, Ying Liu, Daryoush Habibi

Research outputs 2014 to 2021

Leak location in water-supply pipelines is of great significance in order to preserve water resources and reduce economic losses. Cross-correlation (CC) based leak location is a popular and effective method in water-supply pipelines (WSP). However, with a decrease of signal to noise ratio (SNR), the errors of time-delay estimation (TDE) based on CC will become larger making it almost impossible to determine a leakage position. Hence, this work proposes leak location based on a combination of phase difference spectrum and variational mode decomposition (PDS-VMD) of leakage-induced vibration signal under low SNR for WSP. Firstly, the leakage-induced vibration signal is decomposed …

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Remodeling The Skeletal Muscle Extracellular Matrix In Older Age—Effects Of Acute Exercise Stimuli On Gene Expression, Matthias Gumpenberger, Barbara Wessner, Alexandra Graf, Marco V. Narici, Christian Fink, Sepp Braun, Christian Hoser, Anthony J. Blazevich, Robert Csapo Jan 2020

Remodeling The Skeletal Muscle Extracellular Matrix In Older Age—Effects Of Acute Exercise Stimuli On Gene Expression, Matthias Gumpenberger, Barbara Wessner, Alexandra Graf, Marco V. Narici, Christian Fink, Sepp Braun, Christian Hoser, Anthony J. Blazevich, Robert Csapo

Research outputs 2014 to 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. With advancing age, the skeletal muscle extracellular matrix (ECM) undergoes fibrotic changes that may lead to increased muscle stiffness, injury susceptibility and strength loss. This study tested the potential of different exercises to counter these changes by stimulating the activity of genes associated with ECM remodeling. Twenty-six healthy men (66.9 ± 3.9 years) were stratified to two of four groups, performing unilateral (i) conventional resistance exercise, (ii) conventional resistance exercise followed by self-myofascial release (CEBR), (iii) eccentric-only exercise (ECC) or (iv) plyometric jumps (PLY). The non-trained leg served as control. Six …

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Interrelations Among Leadership Competencies Of Bim Leaders: A Fuzzy Dematel-Anp Approach, Seyed Armin Mirhosseini, Reza Kiani Mavi, Neda Kiani Mavi, Behzad Abbasnejad, Farzaneh Rayani Jan 2020

Interrelations Among Leadership Competencies Of Bim Leaders: A Fuzzy Dematel-Anp Approach, Seyed Armin Mirhosseini, Reza Kiani Mavi, Neda Kiani Mavi, Behzad Abbasnejad, Farzaneh Rayani

Research outputs 2014 to 2021

© 2020 by the authors. The use of new, digitally enabled innovations, such as building information modeling (BIM), raises issues such as the delineation of a competent leader. Even though BIM-based competency assessment models have become essential tools for maximizing the potential values of BIM implementation, the current competency models provide limited focus on leadership aspects that facilitate and enhance the BIM implementation efforts. This paper seeks to identify the specific competencies required for BIM implementation and examines the relationships between these competencies. Thirty-two experts from around the globe investigated a total of 15 leadership competencies under three categories pertaining …

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Structural Similarity Loss For Learning To Fuse Multi-Focus Images, Xiang Yan, Syed Zulqarnain Gilani, Hanlin Qin, Ajmal Mian Jan 2020

Structural Similarity Loss For Learning To Fuse Multi-Focus Images, Xiang Yan, Syed Zulqarnain Gilani, Hanlin Qin, Ajmal Mian

Research outputs 2014 to 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Convolutional neural networks have recently been used for multi-focus image fusion. However, some existing methods have resorted to adding Gaussian blur to focused images, to simulate defocus, thereby generating data (with ground-truth) for supervised learning. Moreover, they classify pixels as ‘focused’ or ‘defocused’, and use the classified results to construct the fusion weight maps. This then necessitates a series of post-processing steps. In this paper, we present an end-to-end learning approach for directly predicting the fully focused output image from multi-focus input image pairs. The suggested approach uses a CNN architecture …

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Are Heat Shock Proteins An Important Link Between Type 2 Diabetes And Alzheimer Disease?, Joanne Elizabeth Rowles, Kevin Noel Keane, Thiago Gomes Heck, Vinicius Cruzat, Giuseppe Verdile, Philip Newsholme Jan 2020

Are Heat Shock Proteins An Important Link Between Type 2 Diabetes And Alzheimer Disease?, Joanne Elizabeth Rowles, Kevin Noel Keane, Thiago Gomes Heck, Vinicius Cruzat, Giuseppe Verdile, Philip Newsholme

Research outputs 2014 to 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Type 2 diabetes (T2D) and Alzheimer’s disease (AD) are growing in prevalence worldwide. The development of T2D increases the risk of AD disease, while AD patients can show glucose imbalance due to an increased insulin resistance. T2D and AD share similar pathological features and underlying mechanisms, including the deposition of amyloidogenic peptides in pancreatic islets (i.e., islet amyloid polypeptide; IAPP) and brain (β-Amyloid; Aβ). Both IAPP and Aβ can undergo misfolding and aggregation and accumulate in the extracellular space of their respective tissues of origin. As a main response to protein …

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Enhanced Magneto-Optic Properties In Sputtered Bi-Containing Ferrite Garnet Thin Films Fabricated Using Oxygen Plasma Treatment And Metal Oxide Protective Layers, V. A. Kotov, Mohammad Nur-E-Alam, M. Vasiliev, Kamal Alameh, D. E. Balabanov, V. I. Burkov Jan 2020

Enhanced Magneto-Optic Properties In Sputtered Bi-Containing Ferrite Garnet Thin Films Fabricated Using Oxygen Plasma Treatment And Metal Oxide Protective Layers, V. A. Kotov, Mohammad Nur-E-Alam, M. Vasiliev, Kamal Alameh, D. E. Balabanov, V. I. Burkov

Research outputs 2014 to 2021

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Magneto-optic (MO) imaging and sensing are at present the most developed practical applications of thin-film MO garnet materials. However, in order to improve sensitivity for a range of established and forward-looking applications, the technology and component-related advances are still necessary. These improvements are expected to originate from new material system development. We propose a set of technological modifications for the RF-magnetron sputtering deposition and crystallization annealing of magneto-optic bismuth-substituted iron-garnet films and investigate the improved material properties. Results show that standard crystallization annealing for the as-deposited ultrathin (sputtered 10 nm thick, …

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Energy Efficiency Of A Flat-Plate Solar Collector Using Thermally Treated Graphene-Based Nanofluids: Experimental Study, Omer A. Alawi, Haslinda Mohamed Kamar, Hussein A. Mohammed, A. R. Mallah, Omar A. Hussein Jan 2020

Energy Efficiency Of A Flat-Plate Solar Collector Using Thermally Treated Graphene-Based Nanofluids: Experimental Study, Omer A. Alawi, Haslinda Mohamed Kamar, Hussein A. Mohammed, A. R. Mallah, Omar A. Hussein

Research outputs 2014 to 2021

© The Author(s) 2020. A covalent functionalization approach was utilized for the preparation of highly dispersed pentaethylene glycol-thermally treated graphene-water as the absorbing material inside a flat-plate solar collector. Four mass fractions of nanofluids were prepared (0.025, 0.05, 0.075, and 0.1 wt% pentaethylene glycol-thermally treated graphene-water). Graphene nanoparticles were characterized by energy dispersive X-ray analysis with a scanning electron microscope. Measurements of the thermophysical properties were subsequently carried out for the nanosuspensions. The raw investigation data were collected from an indoor flat-plate solar collector test setup. The experimental procedure included different sets of variables such as input temperatures of 303, …

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Virtual Source Method For Modelling Fully Nonlinear Progressive Water Waves, Omar Ismael Khaleel Al-Tameemi Jan 2020

Virtual Source Method For Modelling Fully Nonlinear Progressive Water Waves, Omar Ismael Khaleel Al-Tameemi

School of Engineering, Computing and Mathematics Theses

This thesis describes the development of the Virtual source method (VSM) to generate linear and nonlinear water waves in a numerical wave tank (NWT) as well as the investigation of its global accuracy. The method is based upon the integral equations derived by using Green’s identity with Laplace’s equation for the velocity potential. BEM and VSM schemes are tested against a number of benchmark scenarios. The first test is the standing wave in a rectangular numerical wave tank. The BEM has shown to be up to 1st order accurate in time while VSM is up to 4th-order. Nonlinear effect beyond …

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Luxe: Combining High Energy And Intensity To Spark The Vacuum, Beate Heinemann, Tom Heinzl, Andreas Ringwald Jan 2020

Luxe: Combining High Energy And Intensity To Spark The Vacuum, Beate Heinemann, Tom Heinzl, Andreas Ringwald

School of Engineering, Computing and Mathematics

The vacuum of quantum electrodynamics (QED) can be viewed as a medium akin to a dielectric which can be polarised by external fields. If these are sufficiently strong, the response of the vacuum becomes nonlinear and involves phenomena such as lightby- light scattering (‘nonlinear optics’) and, in extremis, ‘dielectric breakdown’, i.e. real pair production, if a critical field strength is exceeded. The LUXE experiment aims to realise near-critical fields through collisions of photons stemming from an ultra-intense optical laser with high energy electrons or photons provided by the European XFEL linear accelerator. This set-up provides a golden opportunity to enter …

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Propeller And Vortex Ring State For Floating Offshore Wind Turbines During Surge, Ryan Kyle, Yeaw Chu Lee, Wolf Gerrit Früh Jan 2020

Propeller And Vortex Ring State For Floating Offshore Wind Turbines During Surge, Ryan Kyle, Yeaw Chu Lee, Wolf Gerrit Früh

School of Engineering, Computing and Mathematics

No abstract provided.

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Tsunami Generation By Combined Fault Rupture And Landsliding, Natalia Perez Del Postigo Prieto Jan 2020

Tsunami Generation By Combined Fault Rupture And Landsliding, Natalia Perez Del Postigo Prieto

School of Engineering, Computing and Mathematics Theses

Tsunami generation and propagation mechanisms need to be clearly understood in order to inform predictive models and improve coastal community preparedness. In the last two decades, unexpectedly large tsunamis have devastated localised coastal communities claiming thousands of lives (i.e. the Japan Tsunami of 2011 and Palu Bay Tsunami 2018). An earthquake primarily caused these devastating tsunamis, although the moderate earthquake magnitude for case of (Palu Bay Tsunami 2018), wave directivity and wave arrival time, and extremely large run-up heights in localised areas did not agree with predictions or later tsunami simulations. However, evidence has been later found to suggest that …

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Investigation Of The Chemical Composition Of Plasma-Treated Water By Midiplexc And Its Antimicrobial Effect On L. Monocytogenes And Pseudomonas Fluorescens Monospecies Suspension Cultures, Oliver Handorf, Harald Below, Uta Schnabel, Katharina Riedel Jan 2020

Investigation Of The Chemical Composition Of Plasma-Treated Water By Midiplexc And Its Antimicrobial Effect On L. Monocytogenes And Pseudomonas Fluorescens Monospecies Suspension Cultures, Oliver Handorf, Harald Below, Uta Schnabel, Katharina Riedel

Articles

Plasma -generated compounds conceived by microwave -induced plasma (MidiPLexc) were physicochemically investigated in their molecular compositions. Therefore, plasma -treated water (PTW) was generated by treatment with the MidiPLexc within a 1 l glass bottle for a pre -treatment time of 100 s, 300 s and 900 s. The PTW was further investigated in its composition of reactive oxygen/nitrogen species. For this purpose, the hydrogen peroxide (H2O2) concentration of the PTW was determined electrochemically using chronoamperometry, and the anionic components were determined using ion chromatography. As a result, H2O2 concentrations of up to 720 mg l−1 , nitrite concentrations of 1600 …

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Analysis Of A Large Spatiotemporal Groundwater Quality Dataset, Ontario 2010–2017: Informing Human Health Risk Assessment And Testing Guidance For Private Drinking Water Wells, Tessa Latchmore, Paul Hynds, R. Stephen Brown, Corinne Schuster-Wallace, Sarah Dickson-Anderson, Kevin Mcdermott, Anna Majury Jan 2020

Analysis Of A Large Spatiotemporal Groundwater Quality Dataset, Ontario 2010–2017: Informing Human Health Risk Assessment And Testing Guidance For Private Drinking Water Wells, Tessa Latchmore, Paul Hynds, R. Stephen Brown, Corinne Schuster-Wallace, Sarah Dickson-Anderson, Kevin Mcdermott, Anna Majury

Articles

Approximately 1.5 million individuals in Ontario are supplied by private water wells (private groundwater supplies). Unlike municipal supplies, private well water quality remains unregulated, with owners responsible for testing, treating, and maintaining their own water supplies. The primary goal of this study was to assess the effect of repeat sampling of private well water in Ontario and investigate the efficacy of geographically- and/or temporally specific testing recommendations and health risk assessments. The current study combines the Well Water Information System Dataset and the Well Water Testing Dataset from 2010 to 2017, inclusive. These two large existing province-wide datasets collated over …

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Knowledge And Behavioural Interventions To Reduce Human Health Risk From Private Groundwater Systems: A Global Review And Pooled Analysis Based On Development Status, S. Mooney, C. P. Mcdowell, J. O'Dwyer, P. D. Hynds Jan 2020

Knowledge And Behavioural Interventions To Reduce Human Health Risk From Private Groundwater Systems: A Global Review And Pooled Analysis Based On Development Status, S. Mooney, C. P. Mcdowell, J. O'Dwyer, P. D. Hynds

Articles

Groundwater contamination constitutes a significant health risk for private well users residing in rural areas. As the responsibility to safeguard rural private domestic groundwater typically rests with non-expert homeowners, interventions promoting risk mitigation and awareness represent the most viable means of preventing supply contamination. However, no global review or pooled analyses of these interventions has been undertaken to date. The current study sought to identify and quantify the performance of private well interventions from 1990 to 2018 via a global systematised review and pooled analysis. The PICO (Population-Intervention-Comparison-Outcome) approach was employed for literature identification. Relevant studies were statistically analysed across …

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Risk Communication Approaches For Preventing Private Groundwater Contamination In The Republic Of Ireland: A Mixed-Methods Study Of Multidisciplinary Expert Opinion, S. Mooney, J. O'Dwyer, Paul Hynds Jan 2020

Risk Communication Approaches For Preventing Private Groundwater Contamination In The Republic Of Ireland: A Mixed-Methods Study Of Multidisciplinary Expert Opinion, S. Mooney, J. O'Dwyer, Paul Hynds

Articles

The mechanisms of private-well groundwater contamination are uniquely complex, necessitating a multisector communicative approach to risk management, premised on behaviour promotion. In countries such as the Republic of Ireland (ROI), characterised by oftentimes high groundwater contamination risk and concurrently limited user awareness, incorporation of multidisciplinary, ‘expert-based’ knowledge may facilitate design of evidence-based, practical interventions. Expert interviews represent an efficient form of expert consultation, enabling ease of access to niche information and comparison of procedure, but remain under-utilised within the groundwater management literature. In response, the current study elicited opinion from 50 experts across four broad categories (communications, engineering/science, policy, and …

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Emotion-Related Socialization In The Classroom: Considering The Roles Of Teachers And Peers, Carlos Valiente, Jodi Swanson, Dawn Delay, Ashley M. Fraser, Julia H. Parker Jan 2020

Emotion-Related Socialization In The Classroom: Considering The Roles Of Teachers And Peers, Carlos Valiente, Jodi Swanson, Dawn Delay, Ashley M. Fraser, Julia H. Parker

Faculty Publications

The goal of this paper was to apply aspects of the heuristic model advanced by Eisenberg, Cumberland, and Spinrad (1998)to the study of socialization that takes place in preschool and elementary school classrooms. Investigating socialization in this context is important given the number of hours students spend in school, the emotional nature of social interactions that take place involving teachers and students, and the emotions students often experience in the context of academic work. Guided by Eisenberg and colleagues’(1998) call to consider complex socialization pathways, we focus our discussion on ways teachers, peers, and the classroom context can shape students’ …

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Comparison Of Pyrolysis Of Live Wildland Fuels Heated By Radiation Vs. Convection, Mohammad-Saeed Safdari, Elham Amini, David R. Weise, Thomas H. Fletcher Jan 2020

Comparison Of Pyrolysis Of Live Wildland Fuels Heated By Radiation Vs. Convection, Mohammad-Saeed Safdari, Elham Amini, David R. Weise, Thomas H. Fletcher

Faculty Publications

During wildland fires, which include both planned (prescribed fire) and unplanned (wildfire) fires, live and dead plants may be subject to both radiative and convective heat transfer mechanisms. In this study, the pyrolysis of 14 live plant species native to the forests of the southern United States was investigated using a flat-flame burner (FFB) apparatus under three heating modes in order to mimic pyrolysis of plants during wildland fires. The heating modes were: (1) radiation-only, where the plants were pyrolyzed under a moderate heating rate of 4 °C s−1 (radiative flux of 50 kW m−2); (2) convection-only, where the FFB …

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A Statistically Significant Test To Evaluate The Order Or Disorder For A Binary String Of A Finite Length, Jonathan Blackledge, N. Mosola Jan 2020

A Statistically Significant Test To Evaluate The Order Or Disorder For A Binary String Of A Finite Length, Jonathan Blackledge, N. Mosola

Conference papers

—This paper addresses a basic problem in regard to the analysis of a finite binary string or bit stream (of compact support), namely, how to tell whether the string is representative of non-random or intelligible information (involving some form of periodicity, for example), whether it is the product of an entirely random process or whether it is something in between thetwo.Thisproblemhasapplicationsthatincludecryptanalysis, quantitative finance, machine learning, artificial intelligence and other forms of signal and image processing involving the general problem of how to distinguishing real noise from information embedded in noise, for example. After providing a short introductiontotheproblem,wefocusontheapplicationofinformation entropy for solving …

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Deep Learning Towards Intelligent Vehicle Fault Diagnosis, Mohammed Al-Zeyadi, Javier Andreu-Perez, Hani Hagras, Chris Royce, Darren Smith, Piotr Rzonsowski, Ali Malik Jan 2020

Deep Learning Towards Intelligent Vehicle Fault Diagnosis, Mohammed Al-Zeyadi, Javier Andreu-Perez, Hani Hagras, Chris Royce, Darren Smith, Piotr Rzonsowski, Ali Malik

Conference papers

Recently, the rapid development of automotive industries has given rise to large multidimensional datasets both in the production sites and after-sale services. Fault diagnostic systems are one of the services that the automotive industries provide. As a consequence of the rapid development of cars features, traditional rule-based diagnostic systems became very limited. Therefore, more sophisticated AI approaches need to be investigated towards more efficient solutions. In this paper, we focus on utilising deep learning so as to build a diagnostic system that is able to estimate the required services in an efficient and effective way. We propose a new model, …

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Nanomagnetic Resonance Imaging (Nano-Mri) Gives Personalized Medicine A New Perspective, Lorenzo Rosa, Jonathan Blackledge, Albert Boretti Jan 2020

Nanomagnetic Resonance Imaging (Nano-Mri) Gives Personalized Medicine A New Perspective, Lorenzo Rosa, Jonathan Blackledge, Albert Boretti

Books/Book chapters

This chapter provides a brief overview of molecular imaging techniques and its present and future potential in personalized medicine, with special a focus on the magnetic resonance imaging (MRI) approach. It discusses the current techniques that allow for the in vivo visualization of molecular processes at the nanoscale resolution (nano-MRI). Nano-MRI is progressing rapidly thanks to the work of a very small but extremely brilliant community of experts. This paper is not intended to be a comprehensive review of nano-MRI written for these experts, but rather a concise description of the present achievements for a much broader audience of medical …

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Comparison Of Rans Turbulence Models In Predicting Wake Development In A 2-Dimensional Actuator Disk Model, Chee Meng Pang, David Kennedy, Fergal O'Rourke Dr Jan 2020

Comparison Of Rans Turbulence Models In Predicting Wake Development In A 2-Dimensional Actuator Disk Model, Chee Meng Pang, David Kennedy, Fergal O'Rourke Dr

Conference Papers

One of the most popular methodologies used to predict the wake of a tidal stream turbine (TST) is the RANS turbulence models coupled with the actuator disk method. This methodology has been widely adopted in the in the wind industry, since the mid-1990s, to predict wake development of wind turbines. Moreover, the reason for its popularity is its capability to give accurate results at an affordable computational cost, and the application of 2-dimensional actuator disk approach could further reduce the computational cost. In this paper, a number of RANS turbulence models represented by a porous disk were used to simulate …

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The Fabrication And Properties Of Magnetorheological Elastomers Employing Bio-Inspired Dopamine Modified Carbonyl Iron Particles, Yanfen Zhou, Lele Li, Wenyue Li, Shipeng Wen, Liang Jiang, Stephen Jerrams, Jianwei Ma, Shaojuan Chen Jan 2020

The Fabrication And Properties Of Magnetorheological Elastomers Employing Bio-Inspired Dopamine Modified Carbonyl Iron Particles, Yanfen Zhou, Lele Li, Wenyue Li, Shipeng Wen, Liang Jiang, Stephen Jerrams, Jianwei Ma, Shaojuan Chen

Articles

To obtain magnetorheological elastomers (MREs) with improved mechanical properties and exhibiting an enhanced magnetorheological (MR) effect, bio-inspired dopamine modification has been used to improve the functionality at the surface of carbonyl iron (CI) particles. Various techniques including x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to confirm that a polydopamine (PDA) layer of about 27.5 nm had been successfully deposited on the surface of the carbonyl iron particles prior to their inclusion in the MRE composites. The magnetic properties of PDA modified CI particles were shown to be almost the same as those …

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Enhanced Covalent Interface, Crosslinked Network And Gas Barrier Property Of Functionalized Graphene Oxide/Styrene-Butadiene Rubber Composites Triggered By Thiol-Ene Click Reaction, Long Zheng, Stephen Jerrams, Tian Su, Zongchao Xu, Liqun Zhang, Li Liu, Shipeng Wen Jan 2020

Enhanced Covalent Interface, Crosslinked Network And Gas Barrier Property Of Functionalized Graphene Oxide/Styrene-Butadiene Rubber Composites Triggered By Thiol-Ene Click Reaction, Long Zheng, Stephen Jerrams, Tian Su, Zongchao Xu, Liqun Zhang, Li Liu, Shipeng Wen

Articles

The high gas barrier property of a rubber composite is of great significance for reducing the exhaust gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the gas barrier property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process …

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Key Opportunities To Replace, Reduce, And Refine Regulatory Fish Acute Toxicity Tests, N Burden, R Benstead, K Benyon, M Clook, C Green, J Handley, N Harper, Sk Maynard, C Mead, A Pearson, K Ryder, D Sheahan, R Egmond, Jr Wheeler, Th Hutchinson Jan 2020

Key Opportunities To Replace, Reduce, And Refine Regulatory Fish Acute Toxicity Tests, N Burden, R Benstead, K Benyon, M Clook, C Green, J Handley, N Harper, Sk Maynard, C Mead, A Pearson, K Ryder, D Sheahan, R Egmond, Jr Wheeler, Th Hutchinson

School of Geography, Earth and Environmental Sciences

Fish acute toxicity tests are conducted as part of regulatory hazard identification and risk-assessment packages for industrial chemicals and plant protection products. The aim of these tests is to determine the concentration which would be lethal to 50% of the animals treated. These tests are therefore associated with suffering in the test animals, and Organisation for Economic Co-operation and Development test guideline 203 (fish, acute toxicity) studies are the most widely conducted regulatory vertebrate ecotoxicology tests for prospective chemical safety assessment. There is great scope to apply the 3Rs principles-the reduction, refinement, and replacement of animals-in this area of testing. …

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Low Cost And Sustainable Repair Material Made From Alkali-Activated High-Calcium Fly Ash With Calcium Carbide Residue, Tanakorn Phoo-Ngernkham, Chattarika Phiangphimai, Darrakorn Intarabut, Sakonwan Hanjitsuwan, Nattapong Damrongwiriyanupap, Long Yuan Li, Prinya Chindaprasirt Jan 2020

Low Cost And Sustainable Repair Material Made From Alkali-Activated High-Calcium Fly Ash With Calcium Carbide Residue, Tanakorn Phoo-Ngernkham, Chattarika Phiangphimai, Darrakorn Intarabut, Sakonwan Hanjitsuwan, Nattapong Damrongwiriyanupap, Long Yuan Li, Prinya Chindaprasirt

School of Engineering, Computing and Mathematics

No abstract provided.

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Characterisation Of Crack Tip Fields—Cctf5, Michael Vormwald, Neil James, Youshi Hong, Luca Susmel, Francesco Iacoviello Jan 2020

Characterisation Of Crack Tip Fields—Cctf5, Michael Vormwald, Neil James, Youshi Hong, Luca Susmel, Francesco Iacoviello

School of Engineering, Computing and Mathematics

Single parameter characterisation of the crack/notch tip field using fracture mechanics parameters like K, J, or CTOD has been extremely powerful in advancing predictive technologies for critical or subcritical crack growth. It has also become clear over the last decades that single parameter approaches have limitations particularly in dealing with crack growth phenomena arising from crack tip shielding, often resulting from the plastic enclave surrounding a crack. Influences of this enclave on the crack tip stress field ahead of the crack are maximised during cyclic loading. In the case of a parameter like the stress intensity factor that characterises the …

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Weld Solidification Cracking In A 304l Stainless Steel Water Tank, Mn James, L Matthews, Dg Hattingh Jan 2020

Weld Solidification Cracking In A 304l Stainless Steel Water Tank, Mn James, L Matthews, Dg Hattingh

School of Engineering, Computing and Mathematics

Type 304L stainless steel alloy is known to be highly resistant to solidification cracking. In the present case the particular design of the welded seams in a simple 200 litre water tank, along with the likely manner in which the closing welds were made, has led to an interesting example of interdendritic hot cracking in 304L GTA welded using a 309L filler metal. The paper presents a short introduction to hot cracking in austenitic stainless steels and uses the fractographic evidence to demonstrate that this form of cracking has occurred. The cracking has occurred primarily from excessive residual restraint stresses …

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How Can Technology Support Ageing In Place In Healthy Older Adults? A Systematic Review, A Ollevier, G Aguiar, M Palomino, Is Simpelaere Jan 2020

How Can Technology Support Ageing In Place In Healthy Older Adults? A Systematic Review, A Ollevier, G Aguiar, M Palomino, Is Simpelaere

School of Engineering, Computing and Mathematics

Abstract Background Ageing in place has recently gained visibility in healthcare policies and services. Technology has the potential to facilitate independence at home. The objective of this systematic review is to identify technologies that have been rigorously evaluated for supporting the ageing in place of healthy older adults. As well we explored the methods in engagement with technology in healthy older adults. Methods Databases Pubmed, Scopus, PsycInfo and Cinahl were consulted for clinical controlled trials or randomised controlled trials between 2014 and 2019. Studies were included if they contained a technological intervention and focussed on supporting healthy older adults’ independent …

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