Digital Commons Network^™

Identity Adaptation And The Potential For Psychological Growth Following Adversity For Injured Athletes, Alanna M. Riordan, Jill Tracey

Theses and Dissertations (Comprehensive)

The study was undertaken to gain a deeper understanding of the transition process out of competitive athletics experienced by competitive athletes after a career-limiting injury by examining three research questions: 1) What is the identity adaptation process of injured athletes? 2) To what extent, if any, do injured athletes experience growth following adversity? 3) What, if any, psychological skills are used in the injury/career transition processes? Nine former elite ath- letes were recruited through key informant sampling. There were three males and six females, with a mean age of 24.6 years. All participants sustained, at minimum, a season-ending injury and …

Quantifying Cognitive Function In Concussed Athletes Before And After Acute Exercise Using A Choice Reaction Time Task, Stephanie A. Ramautar M.Sc., Michael E. Cinelli Ph.D.

Theses and Dissertations (Comprehensive)

Following a concussion, cognitive deficits have been shown to last longer than symptom resolution. Currently clinicians rely heavily on symptom emergence following the fundamental exercises of the return to play (RTP) protocol, which may leave athletes at risk of returning to play too early if cognitive deficits have not been detected. The purpose of this study was to assess the effects of exercise on choice reaction time (CRT) both at rest and following an acute exercise in 3 populations: non-concussed (NC), recently concussed (RC), and post-concussion syndrome (PCS) individuals. A CRT task in the form of an iPad application measured …

Laterality Across The Lifespan: The Effects Of Task Complexity, Nicole Williams

Theses and Dissertations (Comprehensive)

The current study aimed to build on the work of Gooderham & Bryden (2013) by comparing the effects of task complexity on hand selection across the lifespan. It was hypothesized that the increasing complexity of a task would override a biomechanically efficient movement such that participants would use only the preferred hand to complete the task. It was also hypothesized that older adults would perform similarly to young children with respect to switch points in space. Four age groups of participants (3-7 year olds, 8-12 year olds, 18-25 year olds and adults over 70 years) completed the newly designed Hand …

Response To Mental Health Calls: The Frontline Perspectives Of Police Officers, Communicators And Administrators, Sarah C. Dougall

Theses and Dissertations (Comprehensive)

Abstract

OBJECTIVES: The purpose of this study was to examine the lived experiences of frontline police personnel of a mid-sized police service in Southern Ontario. As the prevalence of mental illness increases, so do the calls for assistance to police services. Police officers often find themselves on the frontline and are often the first responders to mental health calls when an individual is in crisis (Wells & Schafer, 2006). With the majority of current research being quantitative in nature, this qualitative study allowed the voice of frontline police personnel to be heard in order to provide a complete picture of …

Gait Initiation Mechanics In Concussed Varsity Athletes, Adam Harper

Theses and Dissertations (Comprehensive)

Concussions are a common and potentially serious injury that affects athletes across multiple sports. More than ever concussions are now at the forefront of sport-related research.

Current research indicates that in a cohort of Canadian junior hockey players examined during the 2009-2010 season showed a rate of concussion at 36.5% of all athletic injuries (Echlin et al., 2010). This rate of concussion injury indicates that proper evaluations and examination tools are key to successful management of concussions. The objective of this study was to determine whether a functional task such as gait initiation is able to quantify stability difference following …

A Side Of Justice Rarely Seen: Professional Perspectives Toward Youth Justice And Sentencing Procedures In The Exploratory Context Of Canada And Russia, Serge Lokshin M.A.

Theses and Dissertations (Comprehensive)

This thesis contributes to the growing body of literature on comparative youth justice and policy. By analyzing dilemmas faced by youth in justice systems from the perspective of Canada and Russia, the study argues that professional outlooks have a considerable significance for understanding the legal system and its function, and play an important role in shaping judicial administration concerning juveniles. An investigation into professional perspectives on youth justice is used to formulate an understanding of the issues for young people within the legal systems of the respective regions, the sentencing procedures, and the social and procedural contentions facing youth on …

An Exploratory Examination Of Families Engaged In An Adventure Running Kids Program, Heather Isnor

Theses and Dissertations (Comprehensive)

Academics and practitioners have only just begun to delve into the health benefits of outdoor activities in the last few years. In general, the forested settings of these activities have been documented to decrease stress levels, increase recovery rates from disease, and lessen the symptoms of mental illnesses (Kuo & Faber Taylor, 2004). It is believed that the natural environment acts as a setting where humans can engage in physical activity, aesthetic experiences, and social interactions that, in turn, release stress and lead to improved well-being (Bird, 2012). Currently, however, children are experiencing limited exposure to nature and which has …

Effects Of A Heart Rate Variability Biofeedback Intervention On Athletes’ Psychological Responses Following Injury, Andrew S. Rollo Mr.

Theses and Dissertations (Comprehensive)

The purpose of this study was to evaluate the effectiveness of heart rate variability biofeedback (HRV BFB), a form of psychophysiological skills intervention, to improve athletes’ psychological response following an injury. Further, to examine the effects of HRV BFB on self-efficacy, perceived stress and anxiety, pain management, and the psychological responses of injured athletes. HRV BFB effects on athletes’ physiological indices including HRV, HR, and respiration rate were also assessed. Participants were 32 athletes who had sustained a moderate to severe musculoskeletal sports injury, ranging in age from 18 to 36 years (M_age = 20.82, SD = 3.41). …

Exploring Hopes And Fears From Supply Chain Innovations: An Analysis Of Antecedents And Consequences Of Supply Chain Knowledge Exchanges, Eman Nasr

Theses and Dissertations (Comprehensive)

This dissertation sheds light on severalhopes and fears from supply chain innovation in three distinct papers. Paper one introduces the concept of Process Innovation Propagation as an appropriation technique helping to extract the most returns out of a process innovation by exporting to supply chain partners. Paper two devises and empirically tests knowledge properties that best lead to radical and incremental supply chain innovative capabilities. Lastly, paper three conducts an exploratory study that introduces factors affecting a firm’s optimum supply chain innovation strategy. The dissertation makes a strong argument that supply chain innovation is most prominently governed by power …

The Transient Collaboration Model: Theory Building, Structural Formation, And Operationalization, Adrian C. Tan

Theses and Dissertations (Comprehensive)

This thesis seeks to describe the Transient Collaboration Model as a business model, its underlying theoretical principles, its empirical evidence, and its types of possible collaboration structures. The research seeks to determine how companies may build sustained competitive advantages through the structural design of their collaboration associations as a strategic option. Companies' ability to retain long-term competitive advantages is limited in more unpredictable environments. Companies could not afford to internally build and hold all the possible varieties and quantities of resources and capabilities to build future competitive advantages. Collaboration can provide companies with access to multiple partners with diverse resources …

Physical Fitness Characteristics Of An Active Firefighter Population Serving An Urban Area, Michael R. Antolini

Theses and Dissertations (Comprehensive)

Firefighters require a high level of physical fitness in order to meet the demands of their profession. While physical fitness testing is required to join the department, firefighters are not subject to further formal exercise testing throughout the duration of their careers. Active, career firefighters were tested on a variety of physical fitness measures related to body composition, strength, power, and endurance over three testing sessions. 49 firefighters (40.5 ± 8.3 yr, 89.5 ± 13.0 kg, 27.8 ± 3.6 kg/m2) were found to have a resting heart rate of 57.7 ± 8.2 bpm, blood pressure of 121.5 ± 11.9/71.5 ± …

Investigating The Persistence And "Naturalization" Potential Of Salmonella In Non-Host Environments Using Culture-Based And Molecular-Based Fingerprinting Techniques, Robyn L. Morrison

Theses and Dissertations (Comprehensive)

Recent studies suggest the potential exists for enteric microorganisms to become “naturalized” to the complex natural environment through maintenance of their populations via replication and adaptation to the stress imposed by their external surroundings. The aim of this research was to better understand the potential for antimicrobial resistant (AMR) Salmonella to become “naturalized” and the physiological adaptations that allow for non-host survivability as reflected by AMR and community profiling. To better elucidate the prominent factors leading to a “naturalized” condition, two approaches were taken: 1) survey-based field research to gain perspective on the prevalence of AMR Salmonella isolated from variously …

The Benefit Of A Clergy Union To The United Church Of Canada, Margaret J. Perry

Theses and Dissertations (Comprehensive)

This thesis was was motivated by the question of the effect of the union

organizing efforts of some of the clergy in the United Church of Canada. The topics of work, call and covenant/contract are examined in a secondary, qualitative manner to establish the way in which they affect the relationship between clergy and the various levels of the church. The work of philosophers, such as Hannah Arendt and sociologists, such as Richard Sennett, as well as theologians Martin Luther, Jean Calvin, John Wesley, Dietrich Bonhoeffer, Abraham Heschel, and Walter Brueggemann are included in the study. A Biblical understanding of …

Relative Equilibria Of Isosceles Triatomic Molecules In Classical Approximation, Damaris Miriam Mckinley

Theses and Dissertations (Comprehensive)

In this thesis we study relative equilibria of di-atomic and isosceles tri-atomic molecules in classical approximations with repulsive-attractive interaction. For di-atomic systems we retrieve well-known results. The main contribution consists of the study of the existence and stability of relative equilibria in a three-atom system formed by two identical atoms of mass $m$ and a third of mass $m_3$, constrained in an isosceles configuration at all times.

Given the shape of the binary potential only, we discuss the existence of equilibria and relative equilibria. We represent the results in the form of energy-momentum diagrams. We find that fixing the masses …

The Lived Experiences Of Adult Siblings Of Individuals With Asd, Brianne Redquest

Theses and Dissertations (Comprehensive)

Autism Spectrum Disorders (ASD) are the most prevalent neurological and severe developmental disorder affecting 1 in 88 Canadians, reflecting a 78% increase over the last 6 years (Autism Speaks Canada, 2013). ASD is a lifelong disorder which requires a tremendous amount of support and caregiving from family members. As a result, siblings may have unique experiences associated with having a sibling with ASD. As such, the purpose of this study was to examine the lived experiences of adult siblings of individuals with ASD. The study employed a qualitative methodology, more specifically phenomenology (Patton, 2002). One-on-one semi-structured interviews were conducted with …

Modeling And Analysis Of Value-Based Healthcare Delivery, Tannaz Mahootchi

Theses and Dissertations (Comprehensive)

Healthcare reforms are emerging in order to control the increasing healthcare expenditures and to improve the health outcomes. In the context of the Value-based Healthcare Delivery reform, Michael Porter defines value as a patient's health outcome per dollar spent. Porter's proposal is comprised of organizing care around a medical condition (or around patient segments for primary care). Specifically, care will be provided by a dedicated, multidisciplinary team of providers, an Integrated Practice Unit (IPU). The IPU is jointly accountable for the health outcomes of patients and the costs of providing care during the full cycle of care.

The main objective …

The Role Of Body Size On The Outcome Of Mating Interactions In Drosophila Melanogaster, Adam C. Lounsbury

Theses and Dissertations (Comprehensive)

Sexual selection is the process by which some individuals produce more and/or better quality offspring than others because they are better at securing mates. While this may be accomplished by defeating same-sex rivals (intrasexual selection), individuals of one sex (typically females) may also “decide” on the suitability of individuals of the opposite sex (typically males), resulting in intersexual selection on attractive traits. While a great deal of scrutiny has focused on how sexual selection influences male display traits, much less scrutiny has been directed toward the factors underlying female preference, including genetic variation, as well as the extent to which …

The Structures And Practices Of Collaboration Among Environmental Organizations In Waterloo Region, Felix P. Munger

Theses and Dissertations (Comprehensive)

Background: Studies investigating organizational collaboration report increased goal achievement in the case of collaboration but identify that developing effective collaborations is challenging. An increasing number of researchers and practitioners are applying emerging research tools such as social network analysis to study collaborations and many of those who have applied social network analysis suggest, anecdotally, that it is a useful process tool aimed at increasing understanding of collaboration and informed decision-making among collaborative members.

Aims: The main objectives are to: (1) Empirically study networking and collaboration among environmental organizations in Waterloo Region; (2) Contribute to theory and practice development by examining …

Characterizing Dsrna Production In Virus-Infected Fish Cells, Amal Brek Aloufi

Theses and Dissertations (Comprehensive)

Viral dsRNA is produced by almost all viruses sometime during their replicative cycle. These viral nucleic acids are potent inducers of both innate and adaptive immune responses, and are therefore considered important immuno-modulators. Previous studies have shown that viruses produce dsRNA when replicating in mammalian cells; however, to date no one has demonstrated viral dsRNA production in virus infected fish cells. Therefore, the goal of this study is to investigate dsRNA production by fish viruses in fish cells, verifying production and performing initial characterization of the dsRNA molecules being produced. Three different rainbow trout cell lines were used in this …

The Evolutionary Dynamics Of Transcription Factors, Operators, And Their Target Genes Across Prokaryotes, Marc Del Grande

Theses and Dissertations (Comprehensive)

In prokaryotes, transcriptional regulation commonly involves a transcription factor (TF) binding to a particular conserved sequence of nucleotides (operator). Binding elicits a transcriptional response, either activation or repression. The evolution of gene regulation has been identified as a primary driver of species diversity, making it an important area of research. This work examined the dynamics of the interactions between TFs and operators, and TFs and their primary target genes in attempt to assess the rapid evolution of transcriptional regulatory networks (TRNs) across a diverse set of prokaryotes. Using software packages, operator sequences from Escherichia coli K12 were compared to every …

Nesting Ecology Of White-Throated Sparrows (Zonotrichia Albicollis) : The Effects Of Variation In Clutch-Initiation Date And The Application Of Prescribed Fire On Nesting Success, Melissa Olmstead

Theses and Dissertations (Comprehensive)

The study of nesting success is one of the most widely-used methods for examining the factors governing recruitment in birds. Many ecological influences act together to increase or decrease nesting success, and knowledge of these mechanisms is crucial for determining the habitat or conservation requirements of a given species. One ecological influence is the timing of breeding, which in many species is related to a decline in nest success later in the breeding season. Much of the research on this subject has focused on cavity-nesting species, and the hypothesis that this seasonal decline is caused by a mismatch between clutch-initiation …

A Structure-Function Analysis Of The Arabidopsis Chloroplast Import Protein Attic20, James H. Campbell

Theses and Dissertations (Comprehensive)

Arabidopsis thaliana protein Tic20 (atTic20) is a member of the translocon at the inner envelope membrane of chloroplasts. Evidence to date suggests it is part of the main preprotein conducting aperture in the complex, but its exact role is still debated. To help characterize its role, a protocol optimizing yield and purity of recombinantly expressed atTic20 was developed, and a series of experiments was performed to examine its secondary structure and its ability to interact with chloroplast transit peptides. The attempt to increase protein yield was successful, with growth at 20^oC in the auto-inducing media ZYP-5052 showing the …

Urdu As A First Language: The Impact Of Script On Reading In The L1 And English As A Second Language, Amna Mirza

Theses and Dissertations (Comprehensive)

Urdu is a classic example of digraphia, a linguistic situation in which different scripts are used to write the same language (Ahmad, 2011). The analysis of orthographic practices of reading and writing Urdu in Arabic script versus in Urdu script reveals that Muslims learning to read the Quran in Western countries are not explicitly aware of the features specific to Urdu script. The present study examined awareness of script similarity; suggesting that bilinguals who read both scripts, Urdu and Arabic would have an advantage in acquiring L1 through the same scripts. Fifty Canadian bilingual children (6-10 years) were tested for …

Youth Recidivism: A Qualitative Study Of Risk And Resilience, Jesse M. Near Ms.

Theses and Dissertations (Comprehensive)

Abstract

The rates of reoffending for Ontario youth are high and come at a significant cost to both society and the youths involved. Research to date has explored risk and protective factors. Despite this progress, the relationships between these factors and recidivism are not well understood. Knowing that a youth is exposed to any of these identified risk or protective factors does little to explain why these factors do not affect all youth equally and why some youths reoffend while others do not. Resilience theory has increasingly been used as the framework to explore the concept of recidivism. The present …

Through An Intersectionality Lens: Service Provider Views On The Sexual Health Needs Of Racialized Lgbtq Youth In Toronto, Shanshan Yan

Theses and Dissertations (Comprehensive)

This thesis explores the needs and gaps in knowledge and service delivery in sexual health for racialized LGBTQ youth living in Toronto, Canada from the perspective of service providers. Through a grounded theory approach, data were analysed using an intersectionality lens with the intention that the complex identities of the youth be considered. The findings of this study shed light on the barriers that operate at the micro (ie. personal), meso (ie. community) and macro (ie. societal) levels that affect the sexual health outcomes of racialized LGBTQ youth. Key findings from this study point to: 1) the need to closely …

Fight The Dead, Fear The Living: Post-Apocalyptic Narratives Of Fear, Governance And Social Control, Samantha Lynn Kolpin

Theses and Dissertations (Comprehensive)

Post-apocalyptic narratives and themes have become increasingly popular in film, television and graphic novels. By imagining a society without the state, post-apocalyptic narratives are able to explore concerns about current forms of governance and social control. The post-apocalyptic narrative is particularly relevant in a post-9/11 society where public concerns about security and governance are prominent. In this study, I examined the potential allegorical function of the zombie narrative found in Robert Kirkman’s The Walking Dead. Specifically, this project involves an ethnographic content analysis of issues 1-100 of The Walking Dead graphic novel series. Analysis focused on the allegorical purposes of …

Zombies In Bacterial Genomes: Identification And Analysis Of Previously Virulent Phage, Scott Mitchell

Theses and Dissertations (Comprehensive)

Bacteriophage (or ‘phage’) are viruses that infect and reproduce within their bacterial hosts. They have a major global impact on bacterial evolution and ecology, and might influence the pathogenicity of their host bacterium by providing virulence factors. Phage can either be described as “virulent” or “temperate”; the distinguishing feature between the two is their method of replication.

This study sought to identify phage sequences within bacterial host genomes and determine the life cycle of the phage, exploring whether there is a connection between defective phage and previously virulent phage. It would normally be expected that any phage sequences identified within …

A Microgenetic Approach To Examining Set For Variability: An Exploration Of Early Reading Development, Phil R. Cave M.A.

Theses and Dissertations (Comprehensive)

Learning sight words is a process that involves forming connections between letters and their sounds in order to connect spellings of words with their pronunciations as well as their meanings. During the development of sight word reading, children will sound out (phonologically recode) words that they do not yet know by sight (Share, 1995). Because English lacks transparency, sounding out according to grapheme-phoneme correspondences often only results in an approximation to the target word. The process by which a child must match a word they have recoded phonologically with a word that exists in their vocabulary has been referred to …

The Establishment Of A Fibroblastic Cell Line From Yellow Perch (Perca Flavescens) And Its Potential Applications In Toxicology, Katelin W. Spiteri

Theses and Dissertations (Comprehensive)

This thesis describes the establishment, characterization and potential toxicological applications of YPF5, a yellow perch cell line. YPF5 is a fibroblastic cell line derived from the caudal fin of yellow perch. This cell line has been maintained for over 2 years. Cultures have been passaged over 60 times, and successfully cryopreserved and thawed. YPF5 is grown at room temperature in Leibovitz-15 (L-15) media, supplemented with 10% fetal bovine serum and 3% penicillin-streptomycin. The origin of YPF5 has been confirmed as Perca flavescens through “DNA Barcoding” and reaffirmed through Karyotyping (2n = 48) as per literature reported karyology for percidae including …

Effects Of Salinity And Dissolved Organic Matter On Cu Toxicity To Americamysis Bahia In Estuarine Environments, Rabia Nasir

Theses and Dissertations (Comprehensive)

As salinity increases the geochemical speciation of Cu is altered as a result of organic/inorganic complexation/competition. Such salinity changes may further challenge the osmoregulatory capabilities of euryhaline organisms. This chemical-biological interaction complicates the understanding of the impacts of Cu in estuarine waters. Dissolved organic matter (DOM) has been widely established to be an important modifier of Cu toxicity in freshwaters however its effectiveness in modulating Cu toxicity across the range of salinities that occur in estuarine conditions has not been studied in a systematic manner. Site to site differences in DOM quality with respect to the potential for toxicity mitigation …