Digital Commons Network^™

Investigating The Impact Of Winter Exposure To Natural Environments On Perceived Health And Well-Being Using Geographic Ecological Momentary Assessment: A Case Study At Arrowhead Provincial Park, Faith M. Laing

Theses and Dissertations (Comprehensive)

This study examined how winter exposure to specific natural environments influenced perceived health and well-being outcomes using Geographic Ecological Momentary Assessment (GEMA) in Arrowhead Provincial Park. Studies performed in the wintertime are limited, as is our understanding of how specific park features and/or activities impact health and well-being. To address this, GEMA was used with a video component to capture participants’ real-time experience and emotional responses in specific park locations defined by polygon boundaries. Two surveys were administered through participants mobile devices, one being an in-situ engagement survey triggered by entering a bounded location, which included a video and …

Injury To Insight: Exploring The Influence Of Media On Acl Rehabilitation Experiences Of Female Soccer Players, Chynna Ho-Young Cadogan, Jill Tracey

Theses and Dissertations (Comprehensive)

Participation in soccer inherently carries a risk of injury, with female athletes facing a significantly higher susceptibility to anterior cruciate ligament (ACL) injuries (Campbell et al., 2014; Le et al., 2025; Silvers-Granelli, 2021). The increasing participation in women’s soccer, coupled with the growing demand for its consumption through spectatorship, has contributed to a rise in ACL injuries, and increase in media coverage on this phenomenon (Parsons et al., 2021). Understanding how media narratives surrounding ACL injuries and recovery may influence rehabilitation experiences can educate coaches, mental performance consultants, athletic therapists, and female soccer players to better understand and navigate ACL …

Multivariate Quantile Autoregression-Mixed Data Sampling (Mvqar-Midas) Modeling Of Cost Of Living And Supply Chain Dynamics In Canada., Patrick Gbolonyo

Theses and Dissertations (Comprehensive)

In recent years, the rising cost of living as a result of persistent inflationary pressures, disruptions in the global supply chains, and changes in the macroeconomic landscape has become a critical topic of discussion. To address this, we move beyond a mean-based framework and employ a quantile regression approach. This allows the persistence of each series and the transmis- sion of shocks between the Consumer Price Index (CPI) (the total CPI which is a percentage change over the past 12 months), the Interest Rate (IR)(the target for the overnight rate), the New Housing Price Index (NHPI), and high-frequency supply chain …

Autism And Homelessness: An Intersectional Case Study In Kitchener-Waterloo, Ontario, Nicole J. Mcdonald

Theses and Dissertations (Comprehensive)

Homelessness is a growing crisis in Canada, with literature suggesting autistic traits as over-represented within this population. Literature addressing intersectional experiences of autism is emerging, however there are gaps in the research surrounding intersectional experiences of autism and homelessness. Research suggests that autistic individuals may be more vulnerable to experiencing homelessness and face difficulties in exiting homelessness. This qualitative case study utilizes a Disability Justice framework to explore intersectional autistic experiences of homelessness, social service usage, and suggests recommendations on improving support for autistic individuals at risk of and experiencing homelessness. Four autistic participants with experience of homelessness and accessing …

The Phone Eats First: Reconfiguring Cultural Capital And Performing Taste On Tiktok’S #Torontoeats, Annie M. Willick

Theses and Dissertations (Comprehensive)

This study investigates how TikTok reconfigures cultural capital through the visual commodification and performative display of Toronto’s food culture using the hashtag “#TorontoEats”. Through a digital ethnographic multimodal critical discourse analysis, my research considers Bourdieu’s (1984) definition of cultural capital as the guiding definition of distinction, status, and personal taste. This analysis considers how cultural capital manifests through algorithmic engagement, adherence to platform norms, and TikTok’s multimodal format that blends video, sound, text, and gesture to entice audiences. Findings suggest that mundane food practices and activities are transformed into conspicuous commodities on TikTok, where creators position themselves as tastemakers and …

At A Crossroads: Crisis, Vulnerability, And The Possibility Of Transformation Of Nature-Based Tourism In Canada, Brooklyn Rushton

Theses and Dissertations (Comprehensive)

We live in an era shaped by a global polycrisis, where climate change, pandemics, economic shocks, geopolitical tensions, and social inequities are converging to create complex, cascading, and compounding risks. For Canada’s nature-based tourism sector, situated at the nexus of social and ecological systems, the polycrisis both amplifies the vulnerabilities of tourism and highlights tourism’s role in perpetuating global risks. Recognizing this duality, this dissertation examines how crises amplify systemic vulnerabilities while also acting as leverage points for transformative change in Canada’s nature-based tourism sector, drawing on geography, systems thinking, resilience theory, regenerative tourism, and futures thinking scholarship.

The three …

Science Fiction Cinema And The Technological Sublime: Spectacle And The Infinite From Early Cinema To Digital, David Jackson Dr.

Theses and Dissertations (Comprehensive)

This dissertation examines how science fiction cinema constructs and reimagines the technological sublime in the twentieth century: the experience of awe, terror, and admiration provoked by human-made power and scale. Drawing on the philosophical foundations of the sublime in Edmund Burke and Immanuel Kant and extending through Leo Marx’s and David E. Nye’s theorization of the technological sublime, I propose an aesthetic mode in which representation inflected with affect translates technological spectacle into examinations of humanity’s role and agency in the face of overwhelming technologized worlds and in some cases, even the universe itself.

Through three distinct historical periods …

Exploring Leadership In A Changing Church, Tanya Varner

Theses and Dissertations (Comprehensive)

The present phenomenological study investigated the experience of leaders and leadership among active Lutheran clergy serving congregations in the Eastern Synod of the ELCIC in a time of change. Eleven rostered leaders of the Eastern Synod of the Evangelical Lutheran Church in Canada (ELCIC) were interviewed individually using a semi-structured interviews addressing leadership and changes in the church to facilitate the conversation. Participants also completed a participant questionnaire in advance of the semi-structured interview to make sure the sample was diverse in gender, years of ordination and geographical context of ministry. Participants were able to articulate what values and requirements …

The Politics Of Survival: South-South Migration, Urban Informality, Governance, And The Food Security Nexus In Nairobi, Kenya, Zack Ahmed

Theses and Dissertations (Comprehensive)

This dissertation contributes to the scholarship on South-South migration by integrating food security into the analysis of urban governance and migrant livelihoods in Sub-Saharan Africa. While migration and development have been widely examined, their connection to food systems remains underexplored, particularly in urban settings where informality, displacement, and transnational mobility converge. The research addresses this gap by investigating how Somali migrants and refugees in Nairobi’s Eastleigh navigate food insecurity within overlapping systems of governance, inequality, and transnational exchange. It explores three dimensions: the structural and socio-economic determinants of migrant household food insecurity, the impact of the COVID-19 pandemic as a …

Eeg Correlates Of Tactile Synchrony, Devon K. R. Gallagher

Theses and Dissertations (Comprehensive)

New research on the tactile system has suggested that cortical representations of body parts are not fixed, as previously thought, and are instead dynamically maintained through constant sensorimotor information and feedback. Within the somatosensory cortex (S1), the capacity for both permanent and temporary changes have been the topic of ongoing research. The current study aimed to corroborate whether 24 hours of a finger adhesion manipulation is sufficient to elicit behavioural and electrophysiological correlates from cortical reorganization of digit representations in S1, using a behavioural paradigm outlined by Kolasinski et al. (2016). Through electroencephalography (EEG) recording during a tactile discrimination task, …

Moral Identity And Cognitive Mechanisms In Moral Decision-Making, Zachariah I. Hamzagic

Theses and Dissertations (Comprehensive)

Moral identity can be broadly conceptualized as the degree to which an individual places moral values as directly relevant to their personal identity. A recently introduced developmental framework of moral identity argues that moral identity can be conceptualized as a lifelong goal. According to this theoretical framework, the moral identity goal (i.e., to be a moral person and engage in moral action) becomes stronger over the course of development by becoming more abstract (i.e., general), internalized (to satisfy personal ideals) and promotion (i.e., action) oriented. Additionally, the strength of the moral identity goal predicts moral functioning. To date there has …

Implementation Of A 3-Dimensional Hydrodynamic Numerical Model On A Large Northern Lake, Kirin Lorente

Theses and Dissertations (Comprehensive)

Climate change is impacting high latitude regions disproportionately more than those at a lower latitude. With polar lakes being highly sensitive to changes in the climate, shifts in lake ice dynamics and hydrodynamics are indicators of such changes in regional and global climates. These changes impact future seasons in a positive feedback loop, where changes in winter ice cover impact open water nutrients levels and lake thermal structure. This highlights the importance for long-term monitoring. Despite the abundance of lakes distributed across Northern Canada, there has been limited research conducted on these sentinels of climate change.

Specifically, Great Bear Lake …

Methylseleninic Acid Transformations In Nutrient Rich Water Containing Algae Exposed To Simulated Sunlight, Mikayla Cormier

Theses and Dissertations (Comprehensive)

Methylseleninic acid (MSA(IV)) is an organic form of selenium that has been suggested to be one of the most bioaccumulative forms of selenium in aquatic ecosystems. However, there have been no lab studies that confirm this, which is the reason this study was conducted. Once MSA(IV) and other bioavailable forms of selenium enter aquatic ecosystems, organisms such as algae take up these compounds which then bioaccumulate through the food chain. S. obliquus was exposed to 10 ppb MSA(IV) in 10% Bold’s basal medium (BBM) in a growth chamber to mimic environmental conditions over a 7-day period. Carbon traps and filters …

Identifying The Physical Activity Promotion Practices Of Obstetricians And Gynecologists: Patients With Endometriosis And Polycystic Ovary Syndrome, Allison P. Herman

Theses and Dissertations (Comprehensive)

Despite efforts to promote physical activity, many females in Canada do not meet recommended physical activity guidelines. For individuals with gynecological conditions such as endometriosis and polycystic ovary syndrome (PCOS), physical activity may aid in symptom management and improve daily functioning. Healthcare settings, including obstetrics and gynecology, represent an area of opportunity to promote physical activity among this population. This thesis aims to understand the physical activity promotion practices of Ontario-based Obstetricians and Gynecologists (OBGYNs) to patients with endometriosis and/or PCOS. A cross-sectional online survey was conducted to explore OBGYNs promotional practices and perceived factors influencing their engagement in physical …

Cognitive Load Classification Using Functional Near-Infrared Spectroscopy, Pratham Shah

Theses and Dissertations (Comprehensive)

This thesis investigates the classification of cognitive load using functional near-infrared spectroscopy (fNIRS) signals recorded during an N-back working memory task. The study introduces a novel short-channel correction layer designed to suppress superficial physiological noise adaptively, addressing limitations of traditional General Linear Model (GLM) based regression. A single participant dataset comprising 69 validated sessions was analyzed using both conventional machine learning and deep learning approaches. Traditional classifiers: Linear Discriminant Analysis (LDA), Support Vector Machines (SVM), Random Forests, and Gradient Boosting were first evaluated using statistical features (mean, variance, peak, and slope). Among these, Gradient Boosting achieved the highest accuracy (55.6%), …

" Who Am I Here?" Exploring The Racial Identity Development Of Chinese Adolescent International Students In Canada: A Constructivist Grounded Theory Approach, Wen Juan Song

Theses and Dissertations (Comprehensive)

Abstract

This dissertation explores the racial identity development and associated mental health challenges of Chinese Adolescent International Students (CAIS) in Canada, a population navigating complex intersections of race, age, migration, and belonging. Despite their growing presence in Canadian secondary education, CAIS remain understudied in both educational and mental health research, particularly in relation to racial identity development within Western, multicultural societies. Using a Constructivist Grounded Theory methodology, this study draws on in-depth interviews with twenty-five CAIS participants, including ten current high school students, three returnees to China, and twelve who remained abroad in post-secondary education or employment.  The study is …

Unveiling Othering Experiences In Multiethnic Families: Narratives Of Identity And Belonging Among White/Hispanoamerican Women, Maria-Esther Wood

Theses and Dissertations (Comprehensive)

This dissertation explores the lived experiences of multiethnic Hispanoamerican women as they navigate identity, belonging, and familial othering within the context of multiethnic family systems. Using qualitative narrative inquiry, the study centres the voices of nine women residing in Ontario, each with one white parent and one Hispanoamerican parent, ranging in age from 19 to 65. Guided by Dewey’s three-dimensional model of narrative analysis, the research explores how personal stories reflect broader patterns of othering and belonging, the central research question asks: What specific forms of othering related to identity and belonging—inclusive of discrimination and racist treatment—do multiethnic Hispanoamerican women …

A Contribution To Constructing A Theory And Model Of Social Work Leadership, Cheri Darlene Bilitz

Theses and Dissertations (Comprehensive)

Few schools of social work provide formal leadership education and training for emerging social workers—the research topic under exploration was how social work leaders constructed their leadership style. The purpose of the study was to develop a model of social work leadership through understanding leaders’ journeys into leadership and the contextual factors that shaped their leadership. Participants shared the qualities they believed were paramount for leading today and into the future. Seeing schools of social work as leadership incubators for emerging social workers, participants shared their suggestions for scaffolded leadership curriculum. The methodological approach for this research study was constructivist …

Geovig And Purevig: Geometry-Aware Architectures For Efficient Computer Vision, Omar Ismail

Theses and Dissertations (Comprehensive)

Deploying deep learning models for medical image analysis on mobile devices requires a balance between inference latency, memory footprint, and delineating anatomical boundaries with high accuracy. While Convolutional Neural Networks (CNNs) and mobile Vision Transformers (ViTs) offer efficiency, they often struggle to model the irregular, non-local geometric structures inherent in biological tissues without incurring prohibitive computational costs. In this thesis, we introduce GeoViG (Geometric Vision Graph), an architecture that bridges the gap between efficient grid-based processing and explicit Geometric Deep Learning. GeoViG introduces a novel transition from high-resolution pixel grids to low-resolution dynamic graphs via a SpreadEdgePool operator, a geometry-aware …

The Forgotten Carers: A Study Of The Lived Experiences Of Chinese Canadians Caring For A Family Member With Borderline Personality Disorder (Bpd/Fbpd), Judy Y.F. Wu

Theses and Dissertations (Comprehensive)

There is a fair amount of literature on Borderline Personality Disorder (BPD); however, it still lags behind research on other major mental illnesses such as depression and schizophrenia (Furnham et al., 2015). Similarly, while there has been ample research on caring from various perspectives; little has been explored regarding caring for individuals with BPD. Research on Chinese Canadian families caring for patients with BPD is even more scarce. This study explored the lived experiences of Chinese Canadians caring for family members diagnosed with BPD (FBPD) in the Greater Toronto Area (GTA), Ontario, Canada. BPD is characterised by “interpersonal hypersensitivity, affective …

Error-Driven Density Control For Compact Gaussian Splatting Under Sparse Supervision, Abdelrhman Elrawy

Theses and Dissertations (Comprehensive)

This thesis studies efficiency and stability challenges in Gaussian-splatting-based reconstruction under sparse supervision. In few-shot novel view synthesis, standard 3D Gaussian Splatting (3DGS) can overfit the limited training views and grow an unnecessarily large number of primitives due to limitations in its Adaptive Density Control (ADC) mechanism. This thesis introduces an error-driven reformulation of ADC that triggers densification using opacity gradients as a lightweight proxy for rendering error, and shows that such aggressive densification must be paired with delayed and conservative pruning to prevent destructive create--destroy cycles. When combined with depth-based geometric regularization, the resulting framework produces substantially more compact …

Robust And Interpretable Medical Image Segmentation Via Retrieval And Mechanistic Analysis, Salma Ahmed

Theses and Dissertations (Comprehensive)

Medical image segmentation is a critical component of clinical decision-making, yet deep learning based segmentation models face persistent challenges. These models typically require large volumes of densely annotated data, exhibit strong sensitivity to domain shifts across scanners and patient populations, and lack explicit anatomical priors. Furthermore, despite continual architectural advances beyond fully convolutional networks, most segmentation models remain opaque, where they lack the granularity required for component-level analysis. As a result, when segmentation models fail, it is difficult to identify which internal representations are responsible, limiting developers’ ability to diagnose errors, improve robustness, or establish trust in clinical settings. Existing …

Taylorkan-Vit: Parameter-Efficient Vision Transformers For Medical Image Classification, Kaniz Fatema, Dr. Emad Mohammed, Dr. Sukhjit Singh Sehra

Theses and Dissertations (Comprehensive)

Effective and interpretable classification of medical images remains a critical challenge in computer-aided diagnosis, particularly in data-scarce and resource-constrained clinical settings where traditional deep learning models prove impractical. This study addresses the fundamental barrier to Vision Transformer adoption in medical imaging—massive parameter counts and data requirements—through a systematic two-phase methodology. Phase 1 evaluates three spline-based Kolmogorov–Arnold Network (KAN) variants to identify the optimal nonlinear approximation function for parameter-efficient medical image classification: SBTAYLOR-KAN (B-splines with Taylor series), SBRBF-KAN (B-splines with Radial Basis Functions), and SBWAVELET-KAN (B-splines with Morlet wavelets). Comprehensive experiments across brain MRI, chest X-rays, and tuberculosis datasets—without any image …

Three Essays On Corporate Bond Short Selling, Climate And Credit Risks, Manisha Thapa

Theses and Dissertations (Comprehensive)

This dissertation comprises three essays investigating topics on Corporate Bond Short Selling, Climate and Credit Risks.

The first essay addresses the question: Does climate risk influence bond short selling? We address this question by studying how climate risk influences the relationship between corporate bond short selling and subsequent credit default swap (CDS) spreads. We find that future CDS spreads are strongly related to bond short selling for the high climate risk firms. In particular, our fixed effects triple difference-in-differences (DiD) regressions show that sensitivity of subsequent CDS spreads to lagged bond short selling is significantly higher for firms with high …

Cultivating Diversity In Sustainable Food Systems: Black Farming And Lived Experience In Rural Southern Ontario, Kadeem Jerofy Morgan-Adamson Mr.

Theses and Dissertations (Comprehensive)

This research examines the lived experiences of Black food growers in rural Southern Ontario to understand how their perspectives challenge dominant narratives of rurality and inform broader discussions on food sovereignty in Canada. Grounded in postcolonial theory, the study highlights how historical dispossession and persistent inequities shape the access of Black communities to land and resources. Using a mixed-methods approach that includes surveys, semi-structured interviews, and reflexive journaling within a community-based research framework, the study documents the barriers Black food growers face. These include limited land access, insufficient funding, inadequate training pathways, and experiences of racial isolation in rural contexts. …

Assessing Dissolved Organic Matter Sources And Dynamics In Urban Stormwater: Implications For Greenhouse Gases, Harper W. Schmalz

Theses and Dissertations (Comprehensive)

Stormwater management ponds (SWMPs) are important aspects of land-use planning and increasingly recognized as active sites of biogeochemical processing that influence carbon cycling; however, little research has investigated the controls on dissolved organic and dissolved inorganic carbon (DOC and DIC) within these systems. This thesis examined the processing and transformations of dissolved carbon between three compartments to support the development of a greenhouse gas (GHG) box-model for urban stormwater ponds, including SWMP sediment, surface water, and vegetation. The objective of this thesis was to assess the biogeochemical processes that govern the rate and transformation of DOC and DIC between these …

Acid-Base Regulation Mechanisms In The West African Lungfish Protopterus Annectens: An Investigation Into The Role Of The Sodium Proton Exchanger (Nhe), Victor H. Q. Pham-Ho Msc

Theses and Dissertations (Comprehensive)

The lungfish possesses a primitive lung and underdeveloped gills, making use of bimodal respiration. Like other freshwater fishes they must regulate ion- and acid-base equilibrium through active ion uptake (driven by pumps and ion transporters), albeit with challenges due to their underdeveloped gills. My thesis aimed to elucidate the role of the sodium proton exchangers (NHE), encoded by the genes slc9a1/nhe1, slc9a2/nhe2 and slc9a3/nhe3, which are hypothesized to contribute towards acid-base regulation. Pharmacologically, amiloride, a sodium-transport inhibitor, and 5-(N-Ethyl N-isopropyl)-Amiloride (EIPA), an NHE specific inhibitor, affected whole-animal titratable acidity and ammonia fluxes, supporting a physiological function of the NHE. Next, …

Investigating The Immunostimulatory Potential Of Dsrna-Silk Nanoparticle Complexes In Melanoma, Samuel J. Peters

Theses and Dissertations (Comprehensive)

The rate of resistance to immune checkpoint inhibitor treatment in metastatic melanoma is quite high, with an overall rate of 70%. Melanoma achieves these high rates of resistance by suppressing the immune response in the tumour microenvironment (TME), making them immunologically “cold”. The type 1 interferon response could be leveraged to initiate immune responses in melanoma, making their “cold” TMEs “warm” again. Double-stranded ribonucleic acids (dsRNAs) are potent activators of an innate immune response; however, they are susceptible to degradation by nucleases present in the body and need a carrier. Silk nanoparticles (SNPs) are an ideal drug-delivery platform as they …

Intelligent Electric Vehicle Routing For Goods Delivery Under Real-Time Traffic Conditions: A Comparative Framework For Modular Battery Swapping And Dynamic Wireless Charging, Ranjit Jakharabhai Odedra

Theses and Dissertations (Comprehensive)

Electric vehicles (EVs) are becoming central to sustainable and intelligent transportation systems, particularly in urban logistics, where reducing emissions, congestion, and operating inefficiencies is increasingly important. Despite their environmental advantages, the large-scale deployment of EVs in delivery operations remains constrained by limited driving range, time-consuming energy replenishment, and the difficulty of making routing decisions under dynamic traffic and load-dependent energy consumption. Addressing these challenges is essential for improving the practicality and reliability of EV-based freight transportation.

This thesis investigates optimization frameworks for EV routing in urban delivery systems by studying two complementary energy replenishment strategies: modular battery segment swapping and …

Solving Two-Sided Linear And Quadratic Quaternionic Equations, Bowen Liu

Theses and Dissertations (Comprehensive)

This thesis aims to study two-sided quaternionic equations and develop efficient methods for solving them.

By introducing the notion of the discriminant space, we completely characterized the solutions of general two-sided linear quaternionic equations and established analogous results for systems of equations and equations involving conjugation.

We then addressed the nonlinear case x² = axb by deriving explicit formula solutions. The main method is to introduce an efficient way of eliminating the number of real parameters from a, b. By using the Lefschetz fixed point theorem, we can show that any binomial polynomial quaternionic equation has a non-zero solution, …