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2021

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Stockton Ca Data Summary, Gary Bishop Jan 2021

Stockton Ca Data Summary, Gary Bishop

Fuel Efficiency Automobile Test Publications

Simple data summary for on-road emission measurements from Stockton CA.


The Downturn Of Representative Democracy: An Analysis Of How Strategic Voting Drives Political Polarization, Anna Eager Jan 2021

The Downturn Of Representative Democracy: An Analysis Of How Strategic Voting Drives Political Polarization, Anna Eager

Res Publica - Journal of Undergraduate Research

Over the years, polarization in America has not only increased but also become more ideologically focused on in government. Furthermore, scholarship on polarization has ignored the payoffs that political actors seek while they pursue re-election. Elected representatives have numerous objectives to balance while in office. Not only do they need to manage the preferences of the people and the party, but re-election is at the centerfold of their decision-making process. To evaluate this decision-making process a difference is identified between actual vs. perceived polarization. By illustrating a gap between the constituents’ preferences and representatives’ voting choices via actual and perceived …


The Irrationalness Of Game Theory, Oscar Romero Jan 2021

The Irrationalness Of Game Theory, Oscar Romero

Res Publica - Journal of Undergraduate Research

In February 1909, at a time where political scientists were confused as to their purpose to society, the Right Honorable James Bryce highlighted the three most important criteria for effective research of political science at the fifth annual meeting of the American Political Science Association. He declares that political scientists “1) must be critical, 2) must beware of superficial resemblances, and 3) must endeavor to disengage the personal or accidental from the general causes at work” (numbers added) (8). These specific criteria ensure that any political science research conducted leads society to increase its understanding of the laws that govern …


Freak Waves Caused By Reflection, David Andrade, Raphael Stuhlmeier, Michael Stiassnie Jan 2021

Freak Waves Caused By Reflection, David Andrade, Raphael Stuhlmeier, Michael Stiassnie

School of Engineering, Computing and Mathematics

No abstract provided.


Biological Constraints On Neural Network Models Of Cognitive Function, Friedemann Pulvermüller, Rosario Tomasello, Malte R. Henningsen-Schomers, Thomas Wennekers Jan 2021

Biological Constraints On Neural Network Models Of Cognitive Function, Friedemann Pulvermüller, Rosario Tomasello, Malte R. Henningsen-Schomers, Thomas Wennekers

School of Engineering, Computing and Mathematics

Neural network models are potential tools for improving our understanding of complex brain functions. To address this goal, these models need to be neurobiologically realistic. However, although neural networks have advanced dramatically in recent years and even achieve human-like performance on complex perceptual and cognitive tasks, their similarity to aspects of brain anatomy and physiology is imperfect. Here, we discuss different types of neural models, including localist, auto-associative, hetero-associative, deep and whole-brain networks, and identify aspects under which their biological plausibility can be improved. These aspects range from the choice of model neurons and of mechanisms of synaptic plasticity and …


An Analytical Model For Loop Tiling Transformation, V Kelefouras Jan 2021

An Analytical Model For Loop Tiling Transformation, V Kelefouras

School of Engineering, Computing and Mathematics

Loop tiling is a well-known loop transformation that enhances data locality in memory hierarchy. In this paper, we initially reveal two important inefficiencies of current analytical loop tiling models and we provide the theoretical background on how current analytical models can address these inefficiencies. To this end, we propose a new analytical model which is more accurate that the existing ones. We showcase, both theoretically and experimentally, that the proposed model can accurately estimate the number of cache misses for every generated tile size and as a result more efficient tile sizes are opted. Our evaluation results provide high cache …


Smart Sop Architectures And Power Control Managements Between Light Dc Railway And Lv Distribution Network, Tamer Kamel, Zhongbei Tian, Pietro Tricoli Jan 2021

Smart Sop Architectures And Power Control Managements Between Light Dc Railway And Lv Distribution Network, Tamer Kamel, Zhongbei Tian, Pietro Tricoli

School of Engineering, Computing and Mathematics

This paper presents different architectures of smart soft open points to interface electrified DC railways and low voltage power distribution networks. Both networks have similar objectives of power losses reduction, preserve network stability even with a high penetration of renewable energy sources, and accommodate new energy sectors such as electric vehicles and energy storage systems. The proposed smart soft open points will enable a flexible inter-exchange of electrical power between the two networks in order to achieve these challenging objectives. Different power management control approaches are provided in this paper according to the traffic conditions on the railway network as …


Wave Farms And Coastal Protection On Gravel Dominated Beaches, Cristobal Rodriguez-Delgado Jan 2021

Wave Farms And Coastal Protection On Gravel Dominated Beaches, Cristobal Rodriguez-Delgado

School of Engineering, Computing and Mathematics Theses

The repercussions produced by the use of fossil fuels, e.g. climate change and sea level rise, have increased attention on the development of renewable energies. The European Commission has adopted the replacement of carbon fuels by renewable energy sources as one of the main objectives for the XXI century. Among these, wave energy is poised to become one of the most important due to the extensive worldwide resource and comparatively low environmental impacts. Although this renewable energy is yet in an early stage of its development and further research is required, the global resource, including the Mediterranean Sea, provides a …


Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne Jan 2021

Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne

Articles

Ireland has one of the highest rates of emissions per capita in the world and its residential sector is responsible for approximately 10% of total national CO2 emissions. Therefore, reducing the CO2 emissions in this sector will play a decisive role in achieving EU targets of reducing emissions by 40% by 2030. To better inform decisions regarding retrofit of the existing building stock, this study proposes Optimum Insulation Thicknesses (OIT) for typical walls in 25 regions in Ireland. The calculation of OIT includes annual heat energy expenditure, CO2 emissions, and material payback period. The approach taken is based on Heating …


Private Groundwater Management And Risk Awareness: A Cross-Sectional Analysis Of Two Age-Related Subsets In The Republic Of Ireland, Simon Mooney, J. O'Dwyer, Paul Hynds Jan 2021

Private Groundwater Management And Risk Awareness: A Cross-Sectional Analysis Of Two Age-Related Subsets In The Republic Of Ireland, Simon Mooney, J. O'Dwyer, Paul Hynds

Articles

Risk communication represents the optimal instrument for decreasing the incidence of private groundwater contamination and associated waterborne illnesses. However, despite attempts to promote voluntary well maintenance in high groundwater-reliant regions such as the Republic of Ireland, awareness levels of supply status (e.g. structural integrity) have remained low. As investigations of supply awareness are often thematically narrow and homogeneous with respect to sub-population, revised analyses of awareness among both current and future supply owners (i.e. adults of typical well owner and student age) are necessary. Accordingly, the current study utilised a national survey of well users and an age-based comparison of …


Towards An Improved Understanding Of Biogeochemical Processes Across Surface-Groundwater Interactions In Intermittent Rivers And Ephemeral Streams, Lluís Gómez-Gener Jan 2021

Towards An Improved Understanding Of Biogeochemical Processes Across Surface-Groundwater Interactions In Intermittent Rivers And Ephemeral Streams, Lluís Gómez-Gener

Articles

Surface-groundwater interactions in intermittent rivers and ephemeral streams (IRES), waterways which do not flow year-round, are spatially and temporally dynamic because of alternations between flowing, non-flowing and dry hydrological states. Interactions between surface and groundwater often create mixing zones with distinct redox gradients, potentially driving high rates of carbon and nutrient cycling. Yet a complete understanding of how underlying biogeochemical processes across surface-groundwater flowpaths in IRES differ among various hydrological states remains elusive. Here, we present a conceptual framework relating spatial and temporal hydrological variability in surface water-groundwater interactions to biogeochemical processing hotspots in IRES. We combine a review of …


Socio-Economic Factors Associated With The Incidence Of Shiga-Toxin Producing Escherichia Coli (Stec) Enteritis And Cryptosporidiosis In The Republic Of Ireland, 2008–2017, Eiimear Cleary, Martin Boudou, Coilín Oscar Óhaiseadha, Patricia Garvey, Paul Mckeown, Jean O'Dwyer, Paul Hynds Jan 2021

Socio-Economic Factors Associated With The Incidence Of Shiga-Toxin Producing Escherichia Coli (Stec) Enteritis And Cryptosporidiosis In The Republic Of Ireland, 2008–2017, Eiimear Cleary, Martin Boudou, Coilín Oscar Óhaiseadha, Patricia Garvey, Paul Mckeown, Jean O'Dwyer, Paul Hynds

Articles

The Republic of Ireland (ROI) currently reports the highest incidence rates of Shiga-toxin producing Escherichia coli (STEC) enteritis and cryptosporidiosis in Europe, with the spatial distribution of both infections exhibiting a clear urban/rural divide. To date, no investigation of the role of socio-demographic profile on the incidence of either infection in the ROI has been undertaken. The current study employed bivariate analyses and Random Forest classification to identify associations between individual components of a national deprivation index and spatially aggregated cases of STEC enteritis and cryptosporidiosis. Classification accuracies ranged from 78.2% (STEC, urban) to 90.6% (cryptosporidiosis, rural). STEC incidence was …


Development Of A Situational Judgement Test And An Assessment Of Its Efficacy As A Stimulus Of Metacognitive Behaviour In Engineering Students, Darren Carthy Jan 2021

Development Of A Situational Judgement Test And An Assessment Of Its Efficacy As A Stimulus Of Metacognitive Behaviour In Engineering Students, Darren Carthy

Doctoral

Metacognition entails the conscious evaluation and control of one's cognitive processes. This meta-level control of cognitive process is not essential for all activities, but in the domain of problem solving and the development of new expertise, conscious control of mental functioning is essential to success. Previous studies have shown a relationship between metacognitive knowledge & skills and student self-regulated learning, self-efficacy and more generally, with success in academic and non-academic endeavours; they represent critical skills for an aspiring engineer to possess for their future employability. Metacognition can be stimulated by allowing students to engage and reflect on the problem-solving process. …


Preparing Teachers To Teach In K-12 Blended Environments: A Systematic Mapping Review Of Research Trends, Impact, And Themes, Cecil R. Short, Charles R. Graham, Theresa Holmes, Laura Oviatt, Hannah Bateman Jan 2021

Preparing Teachers To Teach In K-12 Blended Environments: A Systematic Mapping Review Of Research Trends, Impact, And Themes, Cecil R. Short, Charles R. Graham, Theresa Holmes, Laura Oviatt, Hannah Bateman

Faculty Publications

No abstract provided.


Reducing Energy Demand In China And The United Kingdom: The Importance Of Energy Literacy, D. R.E. Cotton, J. Zhai, W. Miller, L. Dalla Valle, J. Winter Jan 2021

Reducing Energy Demand In China And The United Kingdom: The Importance Of Energy Literacy, D. R.E. Cotton, J. Zhai, W. Miller, L. Dalla Valle, J. Winter

School of Engineering, Computing and Mathematics

As the impacts of climate change become increasingly visible across the globe, awareness of the need for cleaner energy and demand reduction is growing. Energy literacy offers a strong potential for explaining and predicting energy-related behaviours, yet research and policies focused on this topic remain limited. In this study, energy literacy was measured in a sample of 2806 university students in the United Kingdom and China, in addition to their wider environmental attitudes using the New Ecological Paradigm scale. Findings indicate that energy literacy was relatively high overall, but there were significant differences between the knowledge, attitudes and behavioural intentions …


An Univariate Extreme Sea State And Extreme Wind Speed For An Offshore Wind Turbine Off The South Coast Of Jamaica, A White, M Hann, J Miles, R Rawlinson-Smith, D Greaves Jan 2021

An Univariate Extreme Sea State And Extreme Wind Speed For An Offshore Wind Turbine Off The South Coast Of Jamaica, A White, M Hann, J Miles, R Rawlinson-Smith, D Greaves

School of Engineering, Computing and Mathematics

Offshore wind turbines are exposed to hydrodynamic and wind forces, which must be evaluated when designing them. One of the fundamental steps in the determination of these forces is the calculation of the return levels for significant wave height (Hs), peak wave period (Tp) and 10 m mean wind speed (u10). This paper explored the development of a univariate extreme value-analysis (EVA) sea state(Hs and Tp) and extreme wind speed, within the Caribbean Sea. These results will be used as inputs to a numerical model of a floating offshore wind turbine (FOWT). The Hs and wind speed were determined by …


A Review Of Bast Fibres And Their Composites: Part 4 ~ Organisms And Enzyme Processes, John Summerscales Jan 2021

A Review Of Bast Fibres And Their Composites: Part 4 ~ Organisms And Enzyme Processes, John Summerscales

School of Engineering, Computing and Mathematics

No abstract provided.


Fatigue Crack Growth Of Natural Rubber/Butadiene Rubber Blend Containing Waste Tyre Rubber Powders, Ismawi Hassim Dh Abang, F Abraham, J Summerscales, P Brown Jan 2021

Fatigue Crack Growth Of Natural Rubber/Butadiene Rubber Blend Containing Waste Tyre Rubber Powders, Ismawi Hassim Dh Abang, F Abraham, J Summerscales, P Brown

School of Engineering, Computing and Mathematics

Fatigue crack growth in NR/BR compound and the effect of two different types of recycled rubber powder (RRP) i.e. micronized cryo-ground 74 μm and ambient-ground 400 μm were studied using fracture mechanics approach. Absolute and relative hysteresis losses using single-edge notch tensile (SENT) specimens were determined with a displacement-controlled strain compensating for permanent set of the samples throughout the Fatigue Crack Growth (FCG) experiments. Results indicated a correlation between absolute/relative hysteresis loss and fatigue crack growth rate under specific dynamic strain amplitudes. Differences in relative hysteresis loss showed that additional energy dissipation, due to multiple new crack surfaces at the …


N-Photon Amplitudes In A Plane-Wave Background, James P. Edwards, Christian Schubert Jan 2021

N-Photon Amplitudes In A Plane-Wave Background, James P. Edwards, Christian Schubert

School of Engineering, Computing and Mathematics

We use the worldline formalism to derive master formulas for the one-loop N-photon amplitudes in a plane-wave background, for both scalar and spinor quantum electrodynamics. This generalises previous work by Ilderton and Torgrimsson for the vacuum polarisation case, although with some change in methodology since, instead of evaluating the path integral on the semi-classical trajectory, we use the special kinematics of the plane-wave background to uncover the crypto-gaussian character of this type of worldline path integral.


Application Of Big-Data For Epidemiological Studies Of Refractive Error, James Loughman Jan 2021

Application Of Big-Data For Epidemiological Studies Of Refractive Error, James Loughman

Articles

To examine whether data sourced from electronic medical records (EMR) and a large industrial spectacle lens manufacturing database can estimate refractive error distribution within large populations as an alternative to typical population surveys of refractive error.


A Numerical Investigation Of The Sealing Performance And The Strength Of A Raised Face Metallic Bolted Flange Joint, Muhsin Aljuboury, Md Jahir Rizvi, Stephen Grove, Richard Cullen Jan 2021

A Numerical Investigation Of The Sealing Performance And The Strength Of A Raised Face Metallic Bolted Flange Joint, Muhsin Aljuboury, Md Jahir Rizvi, Stephen Grove, Richard Cullen

School of Engineering, Computing and Mathematics

No abstract provided.


New Algorithm For Optimised Fitting Of Dic Data To Crack Tip Plastic Zone Using The Cjp Model, B Yang, Z Wei, Fa Díaz, Z Liao, Mn James Jan 2021

New Algorithm For Optimised Fitting Of Dic Data To Crack Tip Plastic Zone Using The Cjp Model, B Yang, Z Wei, Fa Díaz, Z Liao, Mn James

School of Engineering, Computing and Mathematics

The work presented in this paper provides guidance in optimally determining the appropriate fitting region used in digital image correlation (DIC) when fitting a crack tip field model to DIC data. In this work, the technique is applied to the CJP crack tip field model and uses the Levenberg-Marguardt (L-M) iterative method to solve for the crack tip position. This is combined with an error analysis of the main term of the Williams series expansion for crack tip stresses and the extrapolation of Saint-Venant’s principle to determine the optimum fitting region for use in DIC fit with the multi-parameter solution …


Limitations Of Small-Scale Yielding For Fatigue Crack Growth, B Marques, Mf Borges, Fv Antunes, Jm Vasco-Olmo, Fa Díaz, Mn James Jan 2021

Limitations Of Small-Scale Yielding For Fatigue Crack Growth, B Marques, Mf Borges, Fv Antunes, Jm Vasco-Olmo, Fa Díaz, Mn James

School of Engineering, Computing and Mathematics

The work described here has led to a simple criterion that defines the boundary of the small-scale yielding, SSY, regime to avoid invalid use of the LEFM parameter, ΔK, as the characterising parameter for fatigue crack growth rate. The approach proposed is based on the analysis of crack tip opening displacement, CTOD, and its separation into elastic and plastic components. SSY conditions are shown to dominate when the elastic component of CTOD is >75% of the total CTOD measured at a distance of 8 μm (the finite element mesh size) behind the crack tip, i.e., Δδe/Δδt > 75%. Large-scale yielding, LSY, …


Cross-Sectional Flattening-Induced Nonlinear Damped Vibration Of Elastic Tubes Subjected To Transverse Loads, Jue Zhu, Wei Bin Yuan, Long Yuan Li Jan 2021

Cross-Sectional Flattening-Induced Nonlinear Damped Vibration Of Elastic Tubes Subjected To Transverse Loads, Jue Zhu, Wei Bin Yuan, Long Yuan Li

School of Engineering, Computing and Mathematics

No abstract provided.


Comparative Mechanical And Microstructural Properties Of High Calcium Fly Ash One-Part Geopolymers Activated With Na2sio3-Anhydrous And Naalo2, Ooi Wan-En, Liew Yun-Ming, Heah Cheng-Yong, Mohd Mustafa Al Bakri Abdullah, Long Yuan Li, Li Ngee Ho, Foo Kai Loong, Ong Shee-Ween, Ng Hui-Teng, Ng Yong-Sing, Nur Ain Jaya Jan 2021

Comparative Mechanical And Microstructural Properties Of High Calcium Fly Ash One-Part Geopolymers Activated With Na2sio3-Anhydrous And Naalo2, Ooi Wan-En, Liew Yun-Ming, Heah Cheng-Yong, Mohd Mustafa Al Bakri Abdullah, Long Yuan Li, Li Ngee Ho, Foo Kai Loong, Ong Shee-Ween, Ng Hui-Teng, Ng Yong-Sing, Nur Ain Jaya

School of Engineering, Computing and Mathematics

This paper investigates the effect of varying solid alkali activators on the fresh and hardened properties and microstructural changes of one-part geopolymers (OPGs). Single and binary solid alkali activators were used to activate high calcium fly ash. The alkali activators were either solely sodium metasilicate (Na2SiO3) or a combination of sodium aluminate (NaAlO2) and sodium metasilicate (Na2SiO3). The OPG activated with anhydrous Na2SiO3 achieved an excellent 28-day compressive strength of 83.6 MPa while OPG activated with NaAlO2 and Na2SiO3 attained a compressive strength of 45.1 MPa. The Na2SiO3-activated OPG demonstrated better fluidity than the OPG activated with NaAlO2 and Na2SiO3 …


The Use Of Cyber Ranges In The Maritime Context: Assessing Maritime-Cyber Risks, Raising Awareness, And Providing Training, Kimberly Tam, Kemedi Moara-Nkwe, Kevin D. Jones Jan 2021

The Use Of Cyber Ranges In The Maritime Context: Assessing Maritime-Cyber Risks, Raising Awareness, And Providing Training, Kimberly Tam, Kemedi Moara-Nkwe, Kevin D. Jones

School of Engineering, Computing and Mathematics

A good defensive strategy against evolving cyber threats and cybercrimes is to raise awareness and use that awareness to prepare technical mitigation and human defense strategies. A prime way to do this is through training. While there are already many sectors employing this strategy (e.g., space, smart buildings, business IT), the maritime sector has yet to take advantage of the available cyber-range technology to assess cyber risks and create appropriate training to meet those risks. Cyber security training can come in 2 forms; the first is so security professionals can raise their awareness on the latest and most urgent issues …


Julian Stander, Katerina Tzioli And Mario Cortina Borja: 200 Years Of Greek Independence… And Pms, J Stander, K Tzioli, Borja M Cortina Jan 2021

Julian Stander, Katerina Tzioli And Mario Cortina Borja: 200 Years Of Greek Independence… And Pms, J Stander, K Tzioli, Borja M Cortina

School of Engineering, Computing and Mathematics

No abstract provided.


Walking Through Virtual Doors: A Study On The Effects Of Virtual Location Changes On Memory, Paul W.L. Watson, Swen Gaudl Jan 2021

Walking Through Virtual Doors: A Study On The Effects Of Virtual Location Changes On Memory, Paul W.L. Watson, Swen Gaudl

School of Engineering, Computing and Mathematics

The spaces we inhabit can shape and influence the way in which we learn or reinforce information. Virtual reality (VR) is a technology that allows us to alter and create designed environments with great freedom over the visual, audio, and narrative elements. This freedom would benefit from further guidelines that detail approaches and implementations to best achieve desired information delivery goals. In this paper we present findings of a study that applies location-based memory strategies to VR environments, with the aim to aid word list recall without the subjects being required to apply any memory strategy themselves. Our findings suggest …


A Sph Model With Open Relaxation Boundary For Wave Generation And Absorption, G Zhu, J Hughes, S Zheng, D Greaves Jan 2021

A Sph Model With Open Relaxation Boundary For Wave Generation And Absorption, G Zhu, J Hughes, S Zheng, D Greaves

School of Engineering, Computing and Mathematics

In this paper, a numerical wave tank with open relaxation boundaryfor wave simulation is presented under the framework of weakly compressible Smoothed Particle Hydrodynamics (SPH). The open relaxationboundary consists of open boundaries and relaxation particles. A relaxation function is applied for the relaxation particles which are placed between the inflow/outflow zone and the fluid domain. Open particles lie inthe inflow/outflow regions to avoid kernel truncation. The open particlesand relaxation particles can be created and deleted depending on the fluidmotion around the open boundaries, and the properties of these particlescan be obtained from theoretical resolution or by extrapolating withinthe domain. The …


Path Determination For Network Slicing In Wireless Mesh Disaster Networks, A Seng, U Trick, A Lehmann, B Ghita Jan 2021

Path Determination For Network Slicing In Wireless Mesh Disaster Networks, A Seng, U Trick, A Lehmann, B Ghita

School of Engineering, Computing and Mathematics

No abstract provided.