Digital Commons Network^™

Abelian Subalgebras Of Maximal Dimension In Euclidean Lie Algebras, Mark Curro

Theses and Dissertations (Comprehensive)

In this paper we define, discuss and prove the uniqueness of the abelian subalgebra of maximal dimension of the Euclidean Lie algebra. We also construct a family of maximal abelian subalgebras and prove that they are maximal.

Permafrost Thaw-Induced Forest To Wetland Conversion: Potential Impacts On Snowmelt And Basin Runoff In Northwestern Canada, Emily Haughton

Theses and Dissertations (Comprehensive)

In the discontinuous permafrost zone of northwestern Canada, snow covers the ground surface for over half the year, thus snowmelt constitutes a primary source of ecosystem moisture supply and strongly influences stream hydrographs. The peat landscapes along the southern limit of discontinuous permafrost are dominated by forested permafrost plateaus (“forest”), and treeless, permafrost-free wetlands (“wetland”). Permafrost-thaw induced transformation of this landscape has changed water flow and storage processes and therefore introduced new uncertainties on the region’s water futures. Here, I a) characterize forest and wetland water storage and flow from snowmelt, and b) evaluate how permafrost thaw-induced wetland expansion at …

Testing The Network Reset Hypothesis: Noradrenergic Modulation Of Hippocampal Representations, Stephanie L. Grella

Theses and Dissertations (Comprehensive)

The locus coeruleus (LC) responds to salience cues, including novelty, and sends a major noradrenergic projection to the hippocampal formation (HF). Novelty-associated LC activation may help to sculpt contextual representations in the HF, but modulatory influence of norepinephrine (NE) over HF representations remains poorly understood. One possible mechanism is that NE provides a “reset” signal causing the HF to recruit distinct neural populations, thereby providing a molecular switch to dictate if hippocampal circuits should generate new representations or update existing ones to incorporate novel information. This hypothesis suggests that NE release should cause the HF to recruit a unique population …

Spatial And Temporal Variability Of The Snow Environment In The Western Canadian Arctic, Philip Mann

Theses and Dissertations (Comprehensive)

Snow cover in the Western Canadian Arctic is a significant input to the hydrological mass balance, it produces shelter and habitat for animals and humans, and supports interactions with vegetation and climate. The Arctic-tundra snow cover is greatly impacted by wind erosion, redistribution and deposition of snow during high wind events over the winter months. As a result, the end of winter snow cover is characterised by significant small-scale (on the order of a few meters) spatial variations in snow cover depth, density, and thus snow water equivalent (SWE), and runoff. Future climate related changes to snow cover depth and …

The Role Of Channel Fens In Permafrost Degradation Induced Changes In Peatland Discharge At Scotty Creek, Nt, Lindsay Elena Stone

Theses and Dissertations (Comprehensive)

Permafrost degradation in the peat-rich southern fringe of the discontinuous permafrost zone is producing substantial changes to land cover with concomitant expansion of permafrost-free wetlands (bogs and fens) and shrinkage of forest supported by permafrost peat plateaus. Predicting discharge from headwater basins in this region depends on understanding and numerically representing the interactions between storage and discharge within and between the major land cover types, and how these interactions are changing. To better understand the implications of land cover change on wetland discharge, the hydrological behaviour of a channel fen in the headwaters of Scotty Creek, Northwest Territories, Canada, dominated …

Landscape Scale Spectral-Temporal Modelling Of Bamboo-Dominated Forest Succession Within The Atlantic Forest Of Southern Brazil, Clara Greig

Theses and Dissertations (Comprehensive)

Tropical and subtropical ecosystems have become vulnerable to biological invasion (i.e., bamboo) due to human induced forest fragmentation. Bamboo ecological processes have been found to impede forest development, resulting in a state of arrested succession, which has been found to significantly reduce biodiversity, thus contributing to biotic homogenization. In this study we use a semi-empirical approach to develop a community-level spatially explicit ecological process model (hybrid model) using a time-series of Landsat imagery to describe single-landscape scale ecological processes of a pervasive bamboo species (Merostachys skvortzovii) found throughout the Araucaria forest, a critically threatened subtype of Atlantic forest …

Examining Parental Scaffolding In Computer Based Contexts As A Function Of Task Difficulty And Mobility Of Computer Device, Domenica De Pasquale

Theses and Dissertations (Comprehensive)

Technology is part of everyday life for most adults and children. Digital technologies allow children to engage with technology and the digital world earlier in their development than previously experienced (Orlando, 2011; Plowman, Stevenson, Stephen, & McPake, 2012). Two studies were conducted to explore joint media-based interactions of parents and their children. Parental views, age, gender, experience and familiarity with technology were considered in conjunction with parent-child interactions when engaged with stationary and mobile computers and when engaged with easy and difficult to navigate software. Study 1 employed self-report measures consistent with the wider body of literature available regarding early …

Three Essays On Contagion Risk In Supply Chain, Alireza Azimian

Theses and Dissertations (Comprehensive)

Firms often benefit when an unfavourable event befalls a rival, usually through a shift in demand. But sometimes negative events can adversely affect other firms in the industry, a phenomena referred to as contagion. While contagion can harm the supply chain by disrupting supply or demand, or increasing operating costs, it has not yet been studied in the area of supply chain risk management. Aiming to fill this gap, in the first essay I use real cases to conceptualize the process of contagion and apply related theories and literature to theorize the key factors contributing to contagion risk. The …

Spatial Modelling And Wildlife Health Surveillance: A Case Study Of White Nose Syndrome In Ontario, Lauren Yee

Theses and Dissertations (Comprehensive)

Wildlife data is often limited by survey effort, small sample sizes, and spatial biases associated with collection and missing data. These factors can create unique challenges from a surveillance perspective when trying to extract spatial patterns of habitat suitability and disease distributions for conservation and management purposes. This thesis examined data quality from a wildlife health database in the context of spatial analysis of wildlife disease. Spatial analysis of the data to predict habitat suitability of bats and white nose syndrome afflicted bats was examined by using the MaxEnt modelling method. Methods to reduce spatial bias were examined and specific …

The Effects Of Fire On Snow Accumulation, Snowmelt And Ground Thaw On A Peat Plateau In Subarctic Canada, Elyse Mathieu

Theses and Dissertations (Comprehensive)

During the past century, the highest rates of warming have occurred at latitudes above 60^oN, where air temperatures have risen at twice the rate of other regions. In northwestern Canada, this warming has coincided with an increase in the frequency, size and severity of wildfires. The influence of such fires on the trajectory of on-going permafrost thaw is not well understood. As a consequence, the combined impacts of climate warming induced permafrost thaw and possible feedbacks arising from wildfires cannot be properly assessed. This study examines the impact of a 2.7 ha low-severity wildfire (July 2014) on water …

Confronting Sexism In Science, Technology, Engineering, And Math (Stem): What Are The Consequences?, Eden J.V. Hennessey

Theses and Dissertations (Comprehensive)

Disparaging remarks that female scientists are ‘Distractingly Sexy’ (Waxman, 2015) and ‘Too Pretty to Do Math’ t-shirts (Amazon.com) highlight the common belief that women in science, technology, engineering and math (STEM) violate perceived gender norms. However, by confronting these beliefs, women may incur a ‘double-dose’ of hostility; once for being present in science, and again because of the confrontation itself (Kaiser & Miller, 2001). Across three studies, this research tested how women confronting sexism in STEM contexts would elicit and anticipate social costs. Study 1 showed that male participants rated a hypothetical female confronter in STEM higher in bossiness and …

The Role Of Indicators In Promoting Gender Equality Through The Millennium And Sustainable Development Goals, Sara Rose Taylor

Theses and Dissertations (Comprehensive)

With the global rise of evidence-based policy, indicators have become an increasingly important part of governance. Indicators are statistics that represent social experiences, turning complex norms into simplified representations. Although seemingly objective, indicators reflect the values and beliefs of the actors who create them. An indicator’s normative underpinnings have significant consequences for social governance and policy because of an indicator’s power to shape understanding. This multi-manuscript dissertation analyzes the impact of governance by indicators as seen in the Millennium and Sustainable Development Goals (MDGs and SDGs), two major United Nations initiatives in the field of global social governance. The focus …

The Effect Of Oxidation, Thionation, And Dimerization On The Self-Assembly And Photophysical Properties Of Novel Discotic Materials, Katie M. Psutka

Theses and Dissertations (Comprehensive)

This thesis aims to increase understanding of the relationship between molecular structure and liquid crystalline temperature range by exploring the effects of oxidation, thionation, and dimerization on the self-assembly and properties of novel discotic materials. First, two alkoxy-substituted dibenzanthracenequinones were prepared by oxidation of the corresponding dibenzanthracenes. The quinone induced a liquid crystalline phase in the hexaalkoxy dibenzanthracene derivative, but not in the tetralkoxy derivative. However, both of the resulting materials were un-reactive to any further synthetic modifications that could be used to improve their properties. In comparison, two heteroaromatic dithienoanthracenedicarboximides were successfully prepared, although the addition of the thiophene …

Tweeting Strategy: Military Social Media Use As Strategic Communication, Rupinder Mangat

Theses and Dissertations (Comprehensive)

Many Western militaries now actively engage with various social media platforms. The starting point for my dissertation research was this question: how does the military use social media? Considering the Canadian Armed Forces’ use of Twitter as a case study, I collected over 14,000 tweets from four Twitter accounts of the Canadian Armed Forces (CAF), the Canadian Army, the Royal Canadian Navy, and the Royal Canadian Air Force with some tweets as old as September 2012 and the most recent tweets from December 2015. I employed Grounded Theory Method to analyze these tweets, which revealed four themes — organization, history, …

Synthesis, Properties, And Solid-State Structures Of A Series Of 6,13-Dicyanoheteropentacene Analogues: Towards New Liquid Crystalline Materials, L Hiscock, Kenneth E. Maly, Louise N. Dawe

Theses and Dissertations (Comprehensive)

The focus of this thesis is the synthesis of novel heterocyclic pentacene analogs and the investigation of their self-organization for the development of new materials for organic electronics. The thesis consists of two interrelated projects: the first being development of an improved synthesis of a series of liquid crystalline dicyanotetraoxapentacenes (DCTOPs) while the second entails the exploratory synthesis of several novel dicyanoheteropentacene analogues and a preliminary investigation of their photophysical properties and solid-state structures. Both of these projects centre around the use of nucleophilic aromatic substitution reactions on tetrafluoroterephthalonitrile.

Soluble, tetrakis(bis(alkoxy)phenyl)-substituted DCTOPs were originally synthesised via a short synthesis complicated …

Near-Surface Permafrost Ground Ice Characteristics And Ecological And Physical Drivers Of Transient Layer Ice Content In Discontinuous Permafrost, Jason Paul

Theses and Dissertations (Comprehensive)

Accelerated climate warming in northern regions is causing permafrost degradation, leading to the reduction of the areal extent of permafrost. Permafrost is the foundation for many northern ecosystems and communities, so its thaw can have important ecological and societal consequences. Thaw of ice-rich permafrost can cause subsidence of the ground surface proportional to excess ice content. Terrain settlement can cause ponding or damage to infrastructure. Following a surface disturbance that removes much of the vegetation cover, a shift in the ground thermal regime can cause an increase in active layer thickness and rapid thaw of the top portion of permafrost. …

Predicting Credit Ratings With Statistical Learning Methods, Yinduo Ma

Theses and Dissertations (Comprehensive)

After the financial crisis in 2008, for many companies, their credit ratings were downgraded to the non-investment grade. People started concerning the reliability of credit ratings. Credit score rating plays a vital role in the financial system by balancing information between investors and creditors. It is considered as an essential factor to make financial investment decisions. This thesis is an attempt to determine how to predict the credit rating using the publicly available financial information about companies. The data collected are viewed as high-dimensional multivariate financial time series data, which have more than one time series and more than one …

Sharing New Knowledge: A Review Of Dissemination Rates And Journal Emphasis In Career And Technical Education, Victor M. Hernandez-Gantes

Journal of Research in Technical Careers

In career and technical education (CTE), the role of academic journals has been critical in the dissemination of information as the field shifted from vocational education to CTE. To keep up with changes in the field, some journals have been renamed to reflect the new emphasis, other journals have retained their historical branding, and new journals have emerged. Thus, the purpose of this descriptive research was to review the typology and dissemination rates of journals currently available in CTE as a means to clarify their role and impact in the field. The review resulted in the identification of 17 journals …

Defining Effective Teaching In Environmental Education: A Georgia 4-H Case Study, Lillian G. Meighan, Nicholas E. Fuhrman

Journal of Research in Technical Careers

Many studies have examined the positive learning outcomes of environmental education (EE), yet few have questioned the means for achieving such outcomes through non-formal teaching methods. Six interviews and four observations were conducted with 4-H environmental educators in Georgia. Study participants defined effective instruction in Georgia 4-H EE as novel and student-centered, where the educator utilizes their own distinct teaching styles, management of the learning environment, and extra resources while capitalizing on teachable moments. Educators worked to create both personal and environmental connections to inspire students to pursue science and environmental careers. EE trainings should prepare educators with either natural …

Burnout-Depression Overlap: Nomological Network Examination And Factor-Analytic Approach, Renzo Bianchi, Irvin Sam Schonfeld

Publications and Research

Burnout has been defined as a condition in which individuals are left exhausted by a long-term confrontation with unmanageable job stressors. The question of whether burnout reflects anything other than depressive responses to unresolvable stress remains an object of debate. In this 911-participant study (83% female; mean age: 42.36), we further addressed the issue of burnout-depression overlap. Burnout was assessed with the exhaustion subscale of the Maslach Burnout Inventory-General Survey (MBI-GS) and depression with the PHQ-8. The relationships of burnout and depression with three jobrelated variables – illegitimate work tasks, work-nonwork interference, and job satisfaction – and three “context-free” variables …

Digitalized Cognitive Assessment Mediated By A Virtual Caregiver, Matteo Luperto, Marta Romeo, Francesca Lunardini, Nicola Basilico, Ray Jones, Angelo Cangelosi, Simona Ferrante, Na Borghese

School of Nursing and Midwifery

The ageing of the population deeply impacts on the social costs relative to health care. The use of modern technologies is one of the most promising approaches, under current study, to reduce such impact. In this demonstration, we propose a framework that can be employed for at-home assessment of Mild Cognitive Impairment (MCI). It is composed by a set of digitalized cognitive tests, developed from their paper-and-pencil counterparts, and by a Virtual Caregiver, which oversees the test execution and provides instructions.

Executive Functioning Strength As A Predictor For Multitasking Performance, Kaitlin M. Reitz

Undergraduate Theses and Senior Projects

No abstract provided.

The Courtyard Pattern's Thermal Efficiency: Limits And Significance Of Impact, O Al-Hafith, Bk Satish, S Bradbury, P Dewilde

School of Art, Design and Architecture

No abstract provided.

Data Browser 06: Executing Practices, Geoff Cox, Olle Essvik, Jennifer Gabrys, Francisco Gallardo, David Gauthier, Linda Hilfling Ritasdatter, Brian House, Yuk Hui, Marie Louise Juul Søndergaard, Peggy Pierrot, Andrew Prior, Helen Pritchard, Roel Roscam Abbing, Audrey Samson, Kasper Hedegård Schiølin, Susan Schuppli, Femke Snelting, Eric Snodgrass, Winnie Soon, Magdalena Tyzlik-Carver

School of Art, Design and Architecture

This book is a result of collective energy that brought together a group of artists, researchers and practitioners. Their different practices and approaches to the question of execution sparked a desire to carry out a project where thinking about software is entangled with various practices of computationally-informed executions.

Does Carbon Limitation Reduce Nitrogen Retention In Soil?, H. Kate Schofield, Alan D. Tappin, Mark F. Fitzsimons

School of Geography, Earth and Environmental Sciences

No abstract provided.

Protecting Yourself From Revenge Pornography - Share Your Images Before Your Abuser Does!, Ad Phippen, M Brennan

School of Law, Humanities and Social Sciences

There has been considerable legislative development in the UK and other jurisdictions around the protection of the victims of “Revenge Pornography”. While both England and Wales (section 33 of the Serious Crime and Courts Bill 2015) and Scotland (section 2(1) of the Abusive Behaviour and Sexual Harm (Scotland) Act 2016) legislation have already shown a significant response in the courts, this remain a last resort and potentially costly way of resolution for victims. The Crown Prosecution Service guidance suggests that court proceedings will only be pursued by the state if there is clear evidence of intent to cause distress and …

Health Trainer-Led Motivational Intervention Plus Usual Care For People Under Community Supervision Compared With Usual Care Alone: A Study Protocol For A Parallel-Group Pilot Randomised Controlled Trial (Strengthen), Tom P. Thompson, Lynne Callaghan, Emma Hazeldine, Cath Quinn, Samantha Walker, Richard Byng, Gary Wallace, Siobhan Creanor, Colin Green, Annie Hawton, Jill Annison, Julia Sinclair, Jane Senior, Adrian H. Taylor

Peninsula Medical School

IntroductionPeople with experience of the criminal justice system typically have worse physical and mental health, lower levels of mental well-being and have less healthy lifestyles than the general population. Health trainers have worked with offenders in the community to provide support for lifestyle change, enhance mental well-being and signpost to appropriate services. There has been no rigorous evaluation of the effectiveness and cost-effectiveness of providing such community support. This study aims to determine the feasibility and acceptability of conducting a randomised trial and delivering a health trainer intervention to people receiving community supervision in the UK.Methods and analysisA multicentre, parallel, …

Machine-Learning Based Identification Of Undiagnosed Dementia In Primary Care: A Feasibility Study, Emmanuel A. Jammeh, Camille B. Carroll, Sw Pearson, Javier Escudero, Athanasios Anastasiou, Peng Zhao, Todd Chenore, John Zajicek, Emmanuel Ifeachor

Peninsula Medical School

No abstract provided.

Obesity And Dental Caries In Young Children In Plymouth, United Kingdom: A Spatial Analysis, Martha Paisi, Elizabeth Kay, Irene Kaimi, Robert Witton, Robert Nelder, Costas Christophi, Debra Lapthorne

School of Nursing and Midwifery

No abstract provided.

Obesity And Caries In Four-To-Six Year Old English Children: A Cross-Sectional Study, Martha Paisi, Elizabeth Kay, Irene Kaimi, Robert Witton, Robert Nelder, Ruth Potterton, Debra Lapthorne

School of Nursing and Midwifery

No abstract provided.