Digital Commons Network^™

Carbaryl Exposure Alters Gut Microbiome Composition Without Affecting Morphometrics In Eastern Purple Martin (Progne Subis Subis) Nestlings, Stephanie A. Gaspar

Graduate Studies Theses and Dissertations 2026

Eastern purple martins (Progne subis subis) rely entirely on human-provided nesting structures throughout their breeding range in eastern North America. To control haematophagous mites that commonly infest these nests, many landlords apply the carbamate insecticide, carbaryl. Although effective at reducing ectoparasite populations, carbaryl exposure may have unintended effects on the gut microbiome, growth, and condition of developing birds. This study examined the effects of carbaryl exposure on gut microbial communities and morphometric condition in wild nestlings. Nests were experimentally treated with carbaryl, and nestling morphometrics and fecal microbiomes were compared between treated and untreated groups at 18 days …

Emotional Support Friends: Creating Social Impact Through Art And Polite Humor, Kenyari Gil Rosario

Graduate Studies Theses and Dissertations 2026

This thesis aims to provide new imagery to the conversation of mental health and neurodivergence. It does this through forms of soft sculpture, digital paintings, marker drawings, and community murals. Inspired by the practices of Keith Haring, iconographic characters are used to portray common struggles and coping habits of mental conditions in an endearing light. With the goal of social impact, this project is affiliated with the non-profit organization Providing Autism Links and Support (P.A.L.S). This partnership has given the community an opportunity to share their compassion through art and donations and uses art as a means of social impact …

Increasing Actuation Authority And Bandwidth For Aeromechanics Testing: A Piezoelectric-Based Approach, Sydney A. Giannuzzi

Graduate Studies Theses and Dissertations 2026

Flutter in turbomachinery poses significant risks to aerospace systems, requiring accurate identification of flutter boundaries to ensure operational safety. Traditional binary “flutter / no flutter” testing methods provide limited data without error margins. Aeromechanical Identification Methodology (AIM) offers a safer alternative by mapping aeromechanical damping across operational conditions using non-contact excitation. However, current AIM actuators are constrained to excitation frequencies below 500 Hz, limiting their effectiveness and applicability. To bridge this gap, this research analyzed and validated performance of a novel piezoelectric-based oscillatory flow injection valve (NOVA) designed to deliver high-bandwidth, high-authority actuation for expanded flutter boundary mapping.

NOVA was …

Physical Activity And Health Outcomes In Children With Dyslexia During Summer Versus School Months, Tina J. Glatz

Graduate Studies Theses and Dissertations 2026

Children in the United States continue to experience rising rates of overweight and obesity. Children with learning disabilities are twice as likely to have obesity than typically developing peers, partly due to difficulties with motor skills and behavior regulation. The purpose of this study was to examine and compare differences in health outcomes and physical activity (PA) during summer versus school months in children with dyslexia, using a within- subject study design.

At three timepoints (May, August, December 2025), children’s height, weight, and fitness were measured via a portable stadiometer, dual-frequency foot-to-foot bioelectric impedance device, and Progressive Aerobic Cardiovascular Endurance …

Sotl Reconsidered: On The Call To "Meet Today's Urgent Academic And Social Mandates", Jennifer Friberg-Fort, Nancy L. Chick

Faculty Publications - Scholarship of Teaching and Learning

SoTL Reconsidered emerged at the convergence of the current sociopolitical moment in the United States and a tradition that has framed SoTL as a field concerned not only with teaching and learning, but also with higher education’s role in public life.

For more information, visit https://sotlreconsidered.org/.

Vested Rights And The Presumption Of Lawful Use, Adam J. Macleod

Scholarly Articles

Presumptions matter in cases and controversies about private rights. A party who bears the burden of proof or persuasion and who cannot meet that burden will lose. But private law presumptions are not as well under-stood as the presumption of innocence in criminal prosecutions. This article explains a number of presumptions governing property, especially land use, by reference to the concept of vested private rights. A person may enjoy the presumption that his use of property is lawful when he has a right to make the use prior to a legal challenge or change in the law, and his right …

Centered A Story Of Family And Compassion In The Face Of Parkinson's Disease, Savannah Hill

Graduate Studies Theses and Dissertations 2026

Centered is a three-dimensional (3D) animated short film that explores the topic of parental illness and how families must respond with compassion and adaptability when loved ones face mental or physical challenges. The story is inspired by the director’s own experience with her father’s diagnosis of Parkinson’s Disease when she was in high school. The main characters, a father and daughter, must navigate the father’s changing needs after his diagnosis by prioritizing their connection and adapting to his new physical challenges. In the film, they do this through the creation of pottery. The imperfect, handmade design style of the film …

Exercise-Induced Muscle Swelling And Impedance Changes Of The Elbow Flexor, Sofea Smith

Graduate Studies Theses and Dissertations 2026

Electrical impedance myography (EIM) is a non-invasive method that assesses body fluid distribution using impedance (Z), resistance (R), reactance (Xc), and phase angle (PhA). These values have previously been used to interpret cellular health and fluid shifts. Acute muscle edema known as a “pump,” has been reported during and after resistance training exercise and the extent to which bioelectrical properties of the muscle tissue are affected during this process remains relatively unexplored. Therefore, the purpose of this study was to assess changes in EIM during exercise-induced muscle swelling via resistance training. Thirty-one resistance-trained adults (male=21, female=10; age=23.4±6.5 years, BMI=26.17±3.04 kg/m2) …

Cultivating Workplace Happiness In Technology Workers, Cherie A. Herrin

Graduate Studies Theses and Dissertations 2026

Technology workers are central to the innovation and performance of modern organizations and retaining them is a persistent challenge for modern organizations. One important aspect of retention in many contexts is Workplace Happiness, which has been argued to improve worker performance and reduce turnover; however, there is little empirical evidence of the effectiveness of these interventions for technology workers. This dissertation develops a model in which two affective states, Workplace Happiness and Workplace Distress, mediate the relationships between six socio-technical work conditions and two behavioral outcomes: Turnover Intent and Work Execution (i.e., self-rated work performance and quality). A systematic literature …

Bridging The Gap: How Sociodemographic Factors Shape Adults’ Decisions To Pursue Hearing Aids, Logan Lorié

Graduate Studies Theses and Dissertations 2026

Despite hearing aids becoming more accessible to adults with hearing loss, hearing aid uptake rates remain low, partly due to sociodemographic factors that influence an adults’ decision to pursue amplification. This study systematically reviewed research on how sociodemographic factors – to include age, gender, socioeconomic status, education level, race/ethnicity, and military status – contribute to the decision-making process. This review guided an analysis of these variables using the National Health and Nutrition Examination Survey (NHANES), a large public health database. To ensure enough hearing aid users were included in the analysis, NHANES data were combined across survey cycles from 1999 …

Bracing The Wobbly “Three-Legged Stool” By Increasing Homeownership Opportunities For Low- And Middle-Income Workers, Regina T. Jefferson

Scholarly Articles

Traditionally, the primary sources of retirement income were personal savings, the private retirement system, and Social Security. These three sources have been described metaphorically as the “three-legged stool” of retirement security. In this framework, each leg was viewed as a separate and distinct source of income that provided support throughout a worker’s retirement. Each source presented different and varying degrees of risks that were pooled collectively among the individual, the employer, and the government. Each source also functioned independently of the other two. Thus, the traditional framework of retirement income was thought to be ideal because it balanced and diversified …

I Think I Can: The Role Of Racial Socialization And Self-Efficacy On Racial Minorities’ Stereotype Threat And Academic Achievement, Dan'n Tima

UNF Graduate Theses and Dissertations

Racial minority students continue to experience disparities in educational outcomes, leading to research interest in factors that may mitigate the effects of negative racialized experiences in academic contexts. Racial socialization—messages individuals receive about race throughout development—has been linked to positive academic and psychological outcomes in younger populations; however, its relevance for college students remains less understood. The present study examined whether racial socialization predicted academic achievement among Black and Latino undergraduate students and whether it moderated the relationship between stereotype threat and academic achievement. It was further hypothesized that self-efficacy would mediate the relationship between stereotype threat and academic achievement. …

Evaluating The Impact Of Cognitive Distraction On Spaceflight-Relevant Task Performance Using Surface Electromyography And Motion Capture, Allyson K. Mitchell

UNF Graduate Theses and Dissertations

Cognitive distraction poses a risk to astronaut performance during complex, multitasking operations in spaceflight environments. This study examined the effects of cognitive load on neuromuscular coordination and task execution using surface electromyography (sEMG) and motion capture. Thirteen participants performed spaceflight-relevant tasks under undistracted and distracted conditions, with distraction induced through verbal questioning. EMG signals from eight upper-extremity muscles were processed using envelope filtering, peak normalization, and time normalization to enable inter-subject comparison, and group-level mean activation with standard deviation was analyzed. While overall muscle activation was similar between conditions, phase-dependent differences were observed, with undistracted trials showing higher activation during …

Regulation And Localization Of Urease In Sporosarcina Pasteurii: Implications For Coastal Protection, Amar Kosovac

UNF Graduate Theses and Dissertations

Coastal erosion is a persistent problem exacerbated by global warming. As the climate changes, the southeastern coast is likely to experience an increased frequency and intensity of storms, which can significantly damage the coastline. The coast is crucial as it serves as a habitat for numerous animals, supports tourism, and underpins infrastructure. Microbially induced calcite precipitation (MICP) is a novel method to enhance erosion resistance in sandy soils using the non-pathogenic bacterium Sporosarcina pasteurii. S. pasteurii produces urease to catalyze urea into bicarbonate, which drives the precipitation of calcium carbonate. Maximal expression of urease is a limiting factor for …

Multi-Objective Optimization Strategy For Component Sizing In Solar-Hydrogen Microgrids Using An Advanced Hybrid Genetic Algorithm, Dylan Jones

UNF Graduate Theses and Dissertations

This thesis presents the development of a genetic algorithm (GA) optimization framework for the design and component sizing of hybrid solar-hydrogen microgrids. The framework addresses a critical gap in research and existing commercial tools by unifying performance maximization and cost minimization objectives across both grid-tied and islanded configurations. Integrating solar photovoltaics, electrolyzers, hydrogen storage, fuel cells, and batteries, the GA employs adaptive weighting and dynamic boundary constraints to balance technical feasibility with economic efficiency. To ensure real-world viability, the algorithm relies on a novel Daylight Sun Factor (DSF) for localized solar assessment and was rigorously validated against multi-year, high-fidelity irradiance …

Effects Of Pressure-Based Virtual Reality Training On Mental Toughness In Athletes, Rylee J. Aspinwall

UNF Graduate Theses and Dissertations

Athletes often underperform in high-pressure situations due to challenges in emotional regulation rather than deficits in physical skill. Mental toughness, broadly defined as the ability to maintain performance under stress, is a key determinant of athletic success but remains difficult to train using traditional methods. Virtual reality (VR) offers a controlled and immersive environment for simulating competitive pressure; however, its application for training mental toughness remains limited. The present study examined the effects of pressure-based VR training on psychological and physiological responses in collegiate baseball and softball athletes. Participants completed up to eight VR training sessions under either high-pressure or …

Don't Crash Out: The Effects Of Personality And Social Support On Subjective Stress Responses And Heart Rate Variability, Nicholas Kilpatrick

UNF Graduate Theses and Dissertations

The present study examined the relationship between personality traits, physiological stress responses, and subjective stress during a social-evaluative stress task, as well as the potential mediating role of heart rate variability (HRV) and moderating role of imagined social support. Participants completed a laboratory-based modified Trier Social Stress Task while HRV was continuously recorded, and self-reported stress was assessed across task phases. Results indicated that neuroticism and protective self-monitoring were associated with higher levels of subjective stress, while acquisitive self-monitoring was associated with greater reductions in stress following the task. Neuroticism was also associated with greater increases in HRV during the …

Assessing The Effects Of Theta Transcranial Alternating Current Stimulation During Working Memory Performance On Theta-Gamma Phase Amplitude Coupling In Healthy Adults, Samantha M. Zimmer

UNF Graduate Theses and Dissertations

Transcranial alternating current stimulation (tACS) is an emerging form of noninvasive brain stimulation with substantial effects on behavior and brain function due to its ability to entrain endogenous neural oscillations. Working memory is a cognitive process that involves holding onto information that is no longer present in the environment and manipulating or reorganizing information for immediate use. Theta oscillations are critical for the functionality of the frontoparietal network and are involved in strengthening communication and coordination between frontal and parietal brain regions, especially during working memory processing. TACS applied at the theta frequency, targets theta oscillations, strengthens network communications, and …

A Comparative Evaluation Of Data Imbalance Handling Techniques In Machine Learning Models For One-Year Mortality Prediction In Liver Cirrhosis, Sumiya Hasan Trisha

UNF Graduate Theses and Dissertations

Liver cirrhosis is associated with substantial morbidity and mortality, making one-year mortality prediction a clinically relevant problem. Using a liver cirrhosis dataset as the motivating application, this thesis evaluates five machine learning classifiers—Logistic Regression, Random Forest, XGBoost, LightGBM, and CatBoost—under five class-imbalance handling strategies: Baseline learning, Random Oversampling, SMOTE-NC, ADASYN, and Cost-Sensitive Learning. Hyperparameter tuning was conducted using randomized search, and predictive performance was assessed over 200 iterations of Monte Carlo Cross-Validation using Accuracy, Precision, Recall, Fl-score, and ROC-AUC.

The results suggest that imbalance-handling strategies can materially affect predictive performance, particularly recall. Because the outcome of interest is death within …

A Comparative Study Of Classification Methods For Healthcare Analytics, Xueting Zhao

UNF Graduate Theses and Dissertations

This thesis presents a comparative study of logistic regression, Linear Discriminant Analy- sis (LDA), and Quadratic Discriminant Analysis (QDA) for binary classification in healthcare analytics, integrating theoretical derivation, simulation, and real-data application. A facto- rial simulation study crosses the covariance structure (equal vs. unequal), predictor correla- tion (ρ ∈ {0, 0.5, 0.9}), dimensionality (p ∈ {2, 5, 10}) and sample size (n ∈ {50, 100, 200}) across 54 scenarios with 1,000 Monte Carlo replicates each. Three main findings emerge. Logistic regression and LDA are nearly interchangeable when the assumption of equal-covariance holds. QDA achieves substantially better discrimi- nation when class-specific …

Parental Distress, Coercive Control With Food, And Child Self-Regulation, Kattie Nguyen

UNF Graduate Theses and Dissertations

Self-regulation is the management of one's emotions, thoughts, and behaviors to adapt to a situation (Smith-Donald et al., 2007). During infancy and toddlerhood, parents foster self-regulation through co-regulation (e.g., sensitivity, responsiveness), helping children manage their emotions, behaviors, and thoughts (Butler & Randall, 2013). Parents who experience distress (e.g., depression, stress, anxiety) are more likely to use less responsive and harsher, controlling practices like coercive control. Coercive control with food is a practice where parents use food as threats or bribes to control their child’s emotions and behaviors (Vaughn et al., 2016). The present study examined the associations between parental distress, …

Social Support, Trauma And Neurophysiological Stress, Devon S. Glicken

UNF Graduate Theses and Dissertations

Traumatic life experiences and the prolonged effects of stress can negatively impact an individual’s mental and physical health. Hyperreactivity to acute stressors can often be seen in individuals with anxiety, depression, and suicidal ideations, conditions commonly observed with endocrine dysfunction. How do traumatic experiences, particularly experiences related to military affiliation, influence stress responses and feelings of burdensomeness and thwarted belongingness? This study predicted (1) that military-affiliated individuals (and those with PTSD symptomology and high perceived life stress) will have heightened neurophysiological responses to minor levels of acute stress compared to individuals without military-affiliations (and those without PTSD symptomology or high …

Widowed And Wounded? Exploring The Health Impacts Of Adverse Childhood Experiences In Later Life Widowhood, Sierra Wickline

UNF Graduate Theses and Dissertations

Losing a spouse is considered one of the most stressful life events that disproportionately affect older individuals. Exposure to traumatic events at an early age can change the body’s response to subsequent stressors across the lifespan. These physical changes often impact people’s health. Utilizing data from the Health and Retirement Study, the current study aimed to investigate the link between: adverse childhood experiences (ACEs) and three indicators of health: inflammation (i.e., c-reactive protein [CRP], reflecting immune functioning), as well as self-reported depressive symptoms and physical health, among people who have lost a spouse. Participants included 97 widowed individuals aged 68 …

Brewing Black Girl Magic: From Hush-Toned Kitchens To Educational Spaces: A Narrative Inquiry Into The Inherited Wisdom, Radical Resilience, And Professional Becoming Of Black Women, A Three-Paper Dissertation, Sheryl Patterson-Coulibaly

UNF Graduate Theses and Dissertations

This dissertation examines how racialized and gendered expectations shape the professional experiences of Black women in predominantly white educational spaces. Drawing on a three-article format, this study investigates how Black women navigate institutional conditions that depend on their labor yet fail to provide adequate support. Grounded in Black Feminist Marxist Thought and emerging Black Womanist Theory, the study centers the emotional, relational, and spiritual dimensions of Black women’s labor, extending traditional analyses of work, leadership, and resilience.

Of Fire and Fabrication: A Systematic Review on the Myth of Strength and Erasure of Black Women in White Educational Spaces reveals that …

Exploring The Lived Experiences Of Families Of Students With Significant Disabilities In Accessing Community Transition Supports In Rural Settings, Michael David Green Jr.

UNF Graduate Theses and Dissertations

The transition process beyond high school can be daunting for students with disabilities and their families. Families often encounter difficulties accessing community-based supports after students leave the K–12 education system despite federal legislative mandates under the Individuals with Disabilities Education Act (IDEA) and the Workforce Innovation and Opportunity Act (WIOA). Rural contexts further complicate the experience for families accessing adult services after high school. The current hermeneutic phenomenological study explored how families of students with significant disabilities experienced accessing community transition supports after leaving high school in rural contexts. Through the lens of van Manen’s hermeneutic phenomenology, the study explored …

Cryptic Social Mechanisms And Associated Consequences In The Gouldian Finch, Thomas Mateo

UNF Graduate Theses and Dissertations

Many species of birds rely on visual displays to communicate information to their conspecifics, but it can be difficult to determine the specific functions of such displays. In the Gouldian Finch and its relatives, the contexts in which the peering display has been witnessed indicate that it has multiple uses in social learning such as song learning and communicating reproductive intent. Two flocks of finches were housed separately at the University of North Florida aviary and observed for several months while nest boxes were placed in each habitat. In both flocks, peering increased during the summer molt, but did not …

From Framework To Fidelity: A Cipp Evaluation Of Mtss Implementation In A Rural Secondary School, Jodi Arroyo Nagel

UNF Graduate Theses and Dissertations

This formative program evaluation examined implementation of the Multi-Tiered System of Supports (MTSS) at Rowling Middle High School, a rural secondary school in Northwest Florida. Using the Input and Process domains of Stufflebeam’s Context, Input, Process, and Product (CIPP) evaluation model, this evaluation sought to assess the resources currently in place to support MTSS implementation and the extent to which MTSS procedures were implemented with fidelity across grade levels and target subject areas, namely ELA/English/Reading and Math courses. Data were collected through analysis of the 2025-2026 Rowling master schedule, six classroom observations, six semi-structured staff interviews, individual responses to the …

Development And Testing Of A Low-Cost Inertial Impact Sensor, Gabriel Michael Pesek

UNF Graduate Theses and Dissertations

Acceleration sensors have seen increasing usage within sports to detect when somebody receives an impact to their head which can potentially lead to Traumatic Brain Injury (TBI). While adoption of these sensors has steadily risen, the cost of these sensors is often cited as a reason they have not been as widely adopted, especially for amateur teams. This leads to the need for a lower-cost option for detecting these impacts. To fill this gap, a low-cost, lightweight acceleration sensor was designed that exploits the inertia of a working fluid on impact in order to rupture a metallic membrane which acts …

Examining Relationships Between Pre-Arrival Information, Perceived Preparedness, And Distressing Call Outcomes Among Firefighters, Victoria L. Steigerwald

Graduate Studies Theses and Dissertations 2026

Responding to distressing emergency calls increases firefighters’ risk for negative mental health outcomes, including posttraumatic stress disorder, warranting investigation into factors that can be targeted to reduce their risk for call-related distress. The present study examined whether the completeness of pre-arrival information about a distressing call reduced firefighters’ peri- and post-call distress via their perceived preparedness for the call and whether general self-efficacy moderated the relationship between pre-arrival information completeness and perceived preparedness. Data were analyzed from 173 active firefighters in the United States (89.0% male, mean age=37.98 years) who completed an online survey asking them to report on levels …

For Whom The Tale’S Told: Multilevel Perspective On Narrative And Identity In Information Ecosystems, Jihye Song

Graduate Studies Theses and Dissertations 2026

In contemporary online information environments, narratives do not merely convey facts. They organize meaning, signal identity, and guide collective sensemaking. During periods of crisis and uncertainty, these processes become especially salient, as individuals and communities turn to social media to interpret unfolding events. At the same time, these environments are shaped by complex sociotechnical dynamics, including platform affordances, algorithmic amplification, elite influence, and grassroots participation. These dynamics form ecosystems in which narratives and identities are constructed, contested, and stabilized. Drawing on theory and empirical analyses of COVID-19 discourse on Twitter, this work develops and applies a multilevel framework to explain …