Digital Commons Network^™

Unexpected Ring Opening Reactions, Solid-State Structures, And A Chemiluminescent Reaction, L Hiscock

Theses and Dissertations (Comprehensive)

Functional π-materials involve the use of an aromatic π-system to carry out a function such as electron transport (organic electronics), absorbing and emitting photons (dyes, fluorescent materials), self-assembly (discotic liquid crystals), or sensors for various analytes. Our lab has recently published the syntheses of heteroaromatic derivatives of tetrafluoroterephthalonitrile (TFTP, 2.24) synthesised via nucleophilic aromatic substitution chemistry. The prepared derivatives have displayed fluorescent (e.g. 2.2)1 and liquid crystalline (1.0)2 properties, as well as displaying close π-π interactions in the solid state (2.8).3 As the materials we are synthesising all belong to the class of aromatic compounds, an introduction to aromaticity and …

Effect Of Rare Earth Element Mixtures On Daphnia Magna, Celine Do

Theses and Dissertations (Comprehensive)

Rare earth elements (REEs) are increasingly being used in modern technologies and as such, there is an increasing concern for the potential environmental risk associated with anthropogenic contamination. In addition to there being very little data available for individual REEs, there is also a lack of knowledge concerning mixtures. The objective of my study was to investigate the chronic effects of lanthanum (La) and yttrium (Y) as well as the acute effects of neodymium (Nd), praseodymium (Pr) and Y as a single metal and as a mixture to Daphnia magna. Standard 21-d chronic tests and 48-h single metal acute …

Examining The Mental Health Experiences Of Lgbtq+ Identifying Muslim Students In Ontario’S Post-Secondary Institutions, Bushra Ahmed

Theses and Dissertations (Comprehensive)

This qualitative study explores the unique mental health experiences of Ontario’s LGBTQ+ Muslims in post-secondary settings. The study looks at how LGBTQ+ Muslim students’ mental wellness (i.e., sense of belonging, feeling affirmed in their intersecting identities of being Muslim and belonging to LGBTQ+ community) is affected as they try to navigate systemic barriers and make space for themselves in various settings (i.e., academic, LGBTQ+ affirming spaces, Muslim-specific spaces, student services) on campuses in Ontario, Canada. The study sample consists of four LGBTQ+ identified Muslim students across post-secondary institutions in Ontario and participants discussed their emotional, mental, and sense of belonging …

The Wilderness Which Never Was: A History Of The Białowieża Forest 1850–1947, Rafal Stolarz

Theses and Dissertations (Comprehensive)

Located on both sides of the Polish-Belarusian border in north-eastern Poland, the Białowieża forest is the largest remaining remnant of the vast primeval forest that once covered most of Europe. It is also home to Europe’s biggest land animal—the European bison. Over the past century Polish governments, as well as modern-day Polish and European environmental groups, have promoted the forest as the “last European wilderness.” Even today, the public regularly protests and decries news of human encroachment on the forest. Yet in reality, the Białowieża forest has been exploited and studied by humans for centuries, making it one of the …

Mainstream Media Portrayal Of Banishment And Nation-Imposed Punishment, Keely Ormond

Theses and Dissertations (Comprehensive)

“In a traditional village, we wouldn’t have a teepee with no door on it and throw somebody in there. We wouldn’t cast them out, because banishment meant death. What we had to do was restore relationships” – Ryan Beardy (Thorpe, 2022).

The following project examines the representation of Indigenous traditions, customs, and issues in Canadian mainstream media. Specifically, this project is interested in the portrayal of banishment as an Indigenous practice in Canadian mainstream news outlets. This project is based on an interpretive paradigm informed by grounded theory and concepts of media framing, postcolonialism, settler colonialism and restorative justice. Nineteen …

Making The Pluriverse Visible: World-Making On The Saugeen (Bruce) Peninsula, Lauren Judge

Theses and Dissertations (Comprehensive)

This dissertation argues that visual artists who live and work on the Saugeen (Bruce) Peninsula, in Ontario, Canada, are co-creating artworks with non-humans, which is evidence of more-than-human world-making. Such co-creative experiences are the result of, and catalysts for the kinds of enchantment our human worlds need to form meaningful and holistic connections with non-humans, effectively creating a more inclusive pluriverse. After reviewing interdisciplinary literature in posthuman studies, creative geography, arts-based practices, environmental humanities, Indigenous knowledges, and political ontology, I designed my research to include a combination of qualitative methodologies and methods, including autoethnography and research-creation, to investigate fourteen visual …

Indigenous Wholistic Abolition: Visioning Indigenous Queer, Two-Spirit & Indigiqueer Futures, Giselle Dias

Theses and Dissertations (Comprehensive)

As a queer Métis, activist and organizer in the field of prisoners’ rights, penal abolition, and transformative justice, I have been interested in learning about how Indigenous peoples’ relationship with Aki (Land) grounds abolition theory and guides the ways that I and other Indigenous abolitionists engage in abolition. As part of this process, I wanted to speak to other Indigenous queer, Two-Spirit, trans, non-binary, and/or Indigiqueer (Q2STNBI) people about their visions of abolition and abolitionist futures through a relational Land-based lens. Therefore, I used a methodology that centres Métis worldviews and community organizing and is grounded in the ethics of …

“Are We Truly Disruptors?” A Thematic Analysis Of Two Canadian Teachers Disrupting The Status Quo In Their Classrooms, V Pereira

Theses and Dissertations (Comprehensive)

This critical qualitative study looked to better understand the education system as an oppressive force, as well as highlight the strategies current Canadian teachers use to resist racism and colonialism in their classrooms. Using an inductive thematic analysis framework, my data sample consisted of 9 episodes from the podcast series The Chey and Pav Show: Teachers Talking Teaching featuring Toronto-based educators Chey Cheney and Pav (Pawan) Wander. The analysis identified two overarching themes pertaining to Pedagogy and Subject Content. The findings indicated that the educators have undergone a personal journey of social justice learning consisting of reflectivity and accountability, which …

On The Use Of The Local Reflection Coefficient To Assess The Diffuse Field Sound Absorption Coefficient Of A Porous Material, Franck Sgard, Noureddine Atalla, Olivier Robin

Études primaires

The diffuse field sound absorption coefficient (SAC) of a sound absorber can be obtained from an average over the incidence angles of the oblique incidence plane wave SAC. The plane wave SAC can be derived from the plane wave complex-valued reflection coefficient defined as the ratio of the reflected sound pressure at a given point on the material surface to the incident sound pressure at the same point. In practice, the material is excited by a monopole, and the reflection coefficient becomes a local quantity which is a function of the source height and the radial distance from the source. …

A Quantitative Method To Guide The Integration Of Textile Inductive Electrodes In Automotive Applications For Respiratory Monitoring, James Elber Duverger, Victor Bellemin, Patricia Forcier, Justine Decaens, Ghyslain Gagnon, Alireza Saidi

Études primaires

Induction-based breathing sensors in automobiles enable unobtrusive respiratory rate monitoring as an indicator of a driver’s alertness and health. This paper introduces a quantitative method based on signal quality to guide the integration of textile inductive electrodes in automotive applications. A case study with a simplified setup illustrated the ability of the method to successfully provide basic design rules about where and how to integrate the electrodes on seat belts and seat backs to gather good quality respiratory signals in an automobile. The best signals came from the subject’s waist, then from the chest, then from the upper back, and …

Chaney Step Zero: Judicial Review Of Fec Deadlock Dismissals, Natalie R. Schmidt

Scholarly Articles

Partisan polarization has infected our politics at levels not seen in decades. But what happens when the contamination spreads to the institutions responsible for regulating the political process itself? At the Federal Election Commission, nothing. Under the FEC’s governing statute, the Federal Election Campaign Act, any serious action the agency undertakes must be supported by a bipartisan supermajority of commissioners. When the six commissioners fail to reach such consensus—or “deadlock”—due to partisanship or otherwise, nothing happens at all: no investigations, no regulations, no enforcement of federal campaign finance laws. For the first few decades of the FEC’s existence, these deadlocks …

The Very Idea Of Tradition In The Law, Marc O. Degirolami

Scholarly Articles

This lecture was delivered in connection with the St. John Henry Newman Chair in Law at The Catholic University of America, Columbus School of Law, and as part of a conference on "St. John Henry Newman, Tradition, and Law." It reflects on the worth of the idea of tradition in life, law, and Christianity.

The Lost History Of Judicial Restraint, Derek A. Webb

Scholarly Articles

For over 125 years, jurists and scholars who have championed judicial restraint have looked back to James Bradley Thayer’s 1893 Harvard Law Review article, The Origin and Scope of the American Doctrine of Constitutional Law, as the seminal authority for the rule that courts should presume the constitutionality of a challenged law and only invalidate it if its unconstitutionality is “clear” and “beyond a reasonable doubt.” But Thayer presented those three rules (presumption of constitutionality, clear error rule, and reasonable doubt standard) as rooted in historical legal practice in America. And yet none of his twentieth or twenty-first century acolytes …

Advanced Online Continuing Legal Education: How To Leverage Technology-Mediated Education For Lawyers' Lifelong Learning, Seth C. Oranburg

Scholarly Articles

Continuing legal education ("CLE") is theoretically important not only for lawyers but also for society. CLE aims to keep lawyers' knowledge of ever-changing law and technology up to date so that lawyers can continue advancing law on its long bend toward justice. CLE can socialize lawyers to the rapidly changing human phenomenon we call culture so that they remain keenly aware of what justice requires. And CLE could help attorneys fulfill their duty of technological competence by keeping attorneys' understanding of legal technology current. For these reasons, as well as others, most states mandate that lawyers take several hours of …

Critical Theories, Justice, And The Rule Of Law, Adam J. Macleod

Scholarly Articles

An increasing number of legal scholars and activists now identify law as an impediment to justice that must be deconstructed. The deconstructionists tear down the resources we need to sustain the rule of law. And as they deconstruct law, they also deconstruct justice itself. Against deconstructionism, the classical tradition of jurisprudence that gave us our fundamental law affirms that we can know justice and that we can achieve justice through the establishment of law.

That classical tradition made possible the conviction that law is not a mere product of power, as the deconstructionists assert. And that conviction made the rule …

Road Extraction On Remote Sensing Imagery: Historical Mapping Of The Brazilian Amazon, Jonas Paiva Botelho Jr

Graduate Theses/Dissertations

This work proposes an artificial intelligence model based on U-Net architecture to map road networks in the Brazilian Amazon. Over the years, the Amazon region has been heavily exploited, leading to increased deforestation rates, contributing to CO2 emissions, amplifying global warming, and causing a disturbance in local fauna and flora. The expansion into the forest by illegal miners, loggers, and land grabbers can be tracked down by the construction of roads, which we can refer to as the arteries of deforestation. Previous works on the matter proposed algorithms that use high-resolution imagery to map roads precisely. However, this work approach …

Characterization Of The Interaction Of Three Domains Of Nlrp2 (Pyd, Lrr, And Nacht) With Ebp1 Protein, Rakshya Bhatta

Graduate Theses/Dissertations

NOD-like receptors (NLRs) are cytoplasmic proteins essential for various immune responses such as reactions to infectious diseases, metabolic and cellular damage, fetal development, and cancer. Among the 22 identified NLR proteins, research has highlighted the significant roles of NLRP2 in fetal development. NLRP2 is also classified as a maternal effect gene and the mutation to this gene can lead to DNA methylation imprinting defects, altered gene expression, and conditions such as recurrent miscarriages (RMs). The protein EBP1, which has been found to have roles in embryonic development has been implicated in the regulation of DNA methylation. Recent studies have also …

Role Of Ph And Plant Age On The Selection Of Rhizobial Endophytes In Soybean Root Nodules, Cole Alexander Roman

Graduate Theses/Dissertations

Soybeans form symbiotic relationships with nitrogen-fixing bacteria in their root nodules to acquire most of their nitrogen requirement; nitrogen is often one of the limiting nutrients in the soil. Members of the Bradyrhizobium, Sinorhizobium, Mesorhizobium, and Rhizobium genera can nodulate soybeans. Bradyrhizobium is preferentially selected over other types of rhizobia in varying environmental conditions and is often found in acidic soils. Sinorhizobium is often identified in the root nodules of soybeans in neutral and alkaline soil. So far, the potential role of soil pH on the selection of rhizobial endophytes with soybean root nodules is unknown. Likewise, …

Assessing The Effects Of Experimentally Contrived Negative Emotional Contexts On Affect, Willingness, And Impulsivity, Amanda Nicole Middleton

Graduate Theses/Dissertations

Emotions are a naturally occurring and unavoidable part of life. To investigate the role that negative emotional experiencing plays in transfer of stimulus function, relational behavior, and intervention effectiveness, this thesis combines and explores the implications of two manuscripts that examine the effects of negative emotional contexts. Specifically, the first chapter presents research demonstrating the ability of operant schedules of reinforcement and respondent relational training to result in acquired affective and willingness stimulus functions. A between groups design demonstrated that when paired with a frustration-inducing task, negatively valenced functions can be established for arbitrary stimuli, and when observational pairing was …

Suitability Of Reintroduction As A Tool For The Conservation Of The Central American River Turtle (Dermatemys Mawii), Wesley O. Smith

Graduate Theses/Dissertations

The Central American River Turtle (Dermatemys mawii) has declined throughout its historical range to the point that it is critically endangered; the primary driver is overharvesting by humans for consumption. To help conserve this critically endangered turtle, a head-start program was established in Belize and introductions of head-started individuals have been considered to bolster populations. I released and studied hatchling and head-started juvenile Central American River Turtles during the summers of 2021 and 2022, respectively. The goal was to determine the suitability of hatchlings and juveniles for use in conservation reintroductions, along with elucidating aspects of the ecology …

Navigating The Future Of Global Challenges: Analyzing U.S. Foreign Policy In The 21st Century, Chance Lee Hepola

Graduate Theses/Dissertations

In recent years, traditional American foreign policy norms have been rocked by dissent and challenges to the status quo. The rise of American populism, the 2016 election, and the admiration of ‘America First’ policies have contributed to the shift of modern American internationalism and statecraft to a retreat towards isolationism and a wariness to theinternational order. More so, questions regarding the United States’ role in NATO, approach to Ukrainian aid, and the ever-evolving Israel-Hamas War have all but exacerbated the issue of the American approach to foreign policy. Members of Congress, both from the left and the right, are deeply …

The Influence Of Relational Frames On Climate Purchasing And Policy, Lauren Rose Hutchison

Graduate Theses/Dissertations

Evaluative conditioning refers to the effect that occurs when two stimuli are paired together, resulting in a change in the evaluation or function of one of the stimuli. Evaluative conditioning has been researched in various fields of study, such as advertisement and public administration, but synthetization efforts of these results with a relational frame theory approach, and vice versa, have been limited. This thesis used de-identified data from prior approved research to integrate and discusses two manuscripts that provide a relational frame theory perspective to evaluative conditioning effects. Study 1 extends a previous experiment by Matthews et al. (2022) through …

Population Viability Of Egyptian Tortoises: Analyzing Demographics Sensitivities And Extinction Risk In North Sinai, Basem Ahmed Rabia Motwaly

Graduate Theses/Dissertations

This study investigated the population viability of the critically endangered Egyptian Tortoise (Testudo kleinmanni) across five populations in North Sinai, Egypt. The research aimed to assess demographic sensitivities, extinction risks, and the influence of environmental variables to guide conservation strategies. Using multistate mark-recapture models within a Bayesian framework, survival, transition, and recapture probabilities were estimated across life stages, integrating site-specific environmental data such as the Normalized Difference Vegetation Index (NDVI). The analysis revealed stark contrasts between populations, with three sites demonstrating high extinction risk due to lower juvenile survival and limited recruitment. In contrast, two populations exhibited demographic …

Scent Trailing In Neonate Agkistrodon Piscivorus When Exposed To Conspecific And Heterospecific Chemical Cues, Samantha R. Grove

Graduate Theses/Dissertations

Chemosensation is central to snake ecology, playing an essential role in predator recognition, foraging success, and communication with conspecifics. In areas with cold winters, neonatal snakes often trail chemical cues from older individuals to locate communal hibernacula essential for winter survival. Juvenile Northern Cottonmouths (Agkistrodon piscivorus) form social bonds with littermates and have been shown to trail chemical cues of conspecifics in the fall. However, the effect of relatedness on trailing phenomena has not been tested. Using y-maze experiments I evaluated trailing behavior of 32 captive-born neonate Northern Cottonmouths (Agkistrodon piscivorus) to determine if (1) subjects prefer to trail siblings …

Work Characteristics, Workplace Support, And Mental Ill-Health In A Canadian Cohort Of Healthcare Workers During The Covid-19 Pandemic, Nicola Cherry, Anil Adisesh, Igor Burstyn, Quentin Durand-Moreau, Jean-Michel Galarneau, France Labrèche, Shannon Ruzycki, Tanis Zadunayski

Études primaires

Objective The aim of the study was to identify determinants of mental health in healthcare workers (HCW) during the COVID-19 pandemic. Methods A cohort of Canadian HCW completed four questionnaires giving details of work with patients, ratings of workplace supports, a mental health questionnaire, and substance use. Principal components were extracted from 23 rating scales. Risk factors were examined by Poisson regression. Results A total of 4854 (97.8%) of 4964 participants completed ratings and mental health questionnaires. Healthcare workers working with patients with COVID-19 had high anxiety and depression scores. One of three extracted components, 'poor support,' was related to …

Measurement Of The Local Static Mechanical Pressure Of Earplugs, Luiz G.C. Melo, Ahmed S. Dalaq, Franck Sgard, Olivier Doutres, Laurianne Legroux, Eric Wagnac

Études primaires

Earplugs are used in various critical industrial sectors, such as construction, aviation, military and defense, transportation, and healthcare. However, they present inherent drawbacks, notably discomfort that can lead to inconsistent and incorrect use, thereby leaving a significant proportion of workers vulnerable to irreversible hearing damage, ranging from tinnitus to deafness. This discomfort is closely linked to a physical parameter known as static mechanical pressure (SMP), representing the pressure exerted by earplugs on the earcanal walls. Determining the SMP is crucial for developing earplugs that prioritize comfort. However, experimental studies in this area are scarce and there is no experimental set-up …

Excess Risk Of Covid-19 Infection And Mental Distress In Healthcare Workers During Successive Pandemic Waves: Analysis Of Matched Cohorts Of Healthcare Workers And Community Referents In Alberta, Canada, Jean-Michel Galarneau, France Labrèche, Quentin Durand-Moreau, Shannon Ruzycki, Anil Adisesh, Igor Burstyn, Tanis Zadunayski, Nicola Cherry

Études primaires

Objectives: To investigate changes in risk of infection and mental distress in healthcare workers (HCWs) relative to the community as the COVID-19 pandemic progressed. Methods: HCWs in Alberta, Canada, recruited to an interprovincial cohort, were asked consent to link to Alberta’s administrative health database (AHDB) and to information on COVID-19 immunization and polymerase chain reaction (PCR) testing. Those consenting were matched to records of up to five community referents (CRs). Physician diagnoses of COVID-19 were identified in the AHDB from the start of the pandemic to 31 March 2022. Physician consultations for mental health (MH) conditions (anxiety, stress/adjustment reaction, depressive) …

Availability, Use, And Impact Of Workplace Mental Health Supports During The Covid-19 Pandemic In A Canadian Cohort Of Healthcare Workers, Shannon Ruzycki, Anil Adisesh, Igor Burstyn, Quentin Durand-Moreau, France Labreche, Tanis Zadunayski, Nicola Cherry

Études primaires

We investigated the availability and use of workplace mental health (MH) supports during the COVID-19 pandemic in a Canadian cohort of healthcare workers (HCW) and measured anxiety and depression by the Hospital Anxiety and Depression Scale (HADS) completed at four contacts 2020–2022. Reports were available for 4400 HCW working with patients. Half the HCWs had a clinically significant HADS score at one or more contacts Access to MH supports increased during the pandemic, with 94% reporting access to some workplace support by 2022: 47% had made use of at least one support. 25% of those with high HADS scores used …

Chemoreflex Sensitization Occurs In Both Male And Female Rats During Recovery From Acute Lung Injury, Kajal Kamra, Irving H. Zucker, Harold D. Schultz, Han-Jun Wang

Journal Articles: Cellular & Integrative Physiology

Introduction: Sex-specific patterns in respiratory conditions, such as asthma, COPD, cystic fibrosis, obstructive sleep apnea, and idiopathic pulmonary fibrosis, have been previously documented. Animal models of acute lung injury (ALI) have offered insights into sex differences, with male mice exhibiting distinct lung edema and vascular leakage compared to female mice. Our lab has provided evidence that the chemoreflex is sensitized in male rats during the recovery from bleomycin-induced ALI, but whether sex-based chemoreflex changes occur post-ALI is not known. To bridge this gap, the current study employed the bleomycin-induced ALI animal model to investigate sex-based differences in chemoreflex activation during …

Concepts In Animal Parasitology, Chapter 31: Amphilinidea Poche 1922 (Order) [Platyhelminthes, Cestoda, Cestodaria], Klaus Rohde

Concepts in Animal Parasitology

An overview of the cestode (tapeworm) order Amphilinidea Poche, 1922, a large group of large endoparasitic worms infecting the body cavity of freshwater and marine teleost (bony) fishes and freshwater turtles. Covers the morphology of the adults and larvae and the life cycle of a representative species, Austramphilina elongata, and a discussion of other species in the group, including their taxonomy and phylogeny.

Chapter 31 in Concepts in Animal Parasitology by Klaus Rohde. 2024. S. L. Gardner and S. A. Gardner, editors. Zea Books, Lincoln, Nebraska, United States. doi: 10.32873/unl.dc.ciap031