Digital Commons Network^™

Study On Vehicle-Pedestrian Interaction Autonomy By Risk Potential Theory, Riku Kikuta

Theses and Dissertations

Vehicle–pedestrian interaction is a critical aspect of autonomous vehicle (AV) development, as socially acceptable AVs must account for pedestrian intention and behavior. Risk Potential (RP) theory provides a framework to build human-like AVs by modeling expert driver risk perception, but conventional RP models treat pedestrians as static obstacles and neglect their dynamics. This dissertation extends RP theory by incorporating pedestrian velocity and orientation into three new models: the RP velocity model, the RP related-velocity model, and the RP Pedestrian Potential Position (PPP) model. These models were implemented in the Navigating All Terrains Using Robotic Exploration (NATURE) autonomy stack and tested …

A Tale Of Four Cities: The Effect Of Job Specialization On Employee Turnover Within Mississippi’S Local Police Departments, Wesley Bunch

Theses and Dissertations

Unusually high employee turnover among local law enforcement officers in the United States has been well documented. This exploratory case study examines employee turnover from a bilateral perspective of both generalists and specialists within local police departments. The purpose of this study is to determine if working in a specialized unit has any effect on employee turnover amongst local police officers in Mississippi. This study used qualitative methods to conduct interviews with thirty-four officers from four different police departments encompassing Mississippi’s northern, southern, eastern, and western regions. The interviews were conducted with individuals at the rank of officer and having …

Multiple Baseline Single-Case Study: Narrative Resiliency Intervention For Couples With Adverse Childhood Experiences, Emma Elizabeth Allen

Theses and Dissertations

A multiple baseline single case study design was used to examine the effects of a narrative and resiliency-based intervention for couples with adverse childhood experiences (ACEs). Using piecewise multilevel modeling (MLM), the study evaluated changes in depressive symptoms, dyadic coping (DCI), and growth and empowerment measure (Emotional Empowerment Scale [EES-14] and 12 Scenarios [12S]) across waitlist and treatment phases. Five couples (10 individuals) participated in up to 17 waves, with staggered baseline and treatment lengths across dyads. Results indicated significant fixed effects of the 12S subscale for growth and empowerment during the treatment phase. There were no statistically significant fixed …

Power Resilience In Utah's Water Sector: A Survey Of Stakeholder Practices, Preferences And Potential, Tyler Christopher Peterson

Theses and Dissertations

Drinking water and wastewater services are vulnerable to disruptions because they rely heavily on the electric grid. As a result, power outages can lead to water outages, creating cascading failures that compromise sanitation, firefighting, healthcare, and daily routines. Although an important topic, there are little to no studies of water and wastewater power resilience at a geographic or state level. In this study we investigate the extent of existing backup power and renewable energy integration as well as the motivations and barriers around their power resilience. We collect our data through semi-structured interviews with staff at 19 urban and rural …

The Impact Of Social Factors On Vagally Mediated Parasympathetic Activity, Andrew Scot Proctor

Theses and Dissertations

Loneliness and social disconnection are recognized risk factors for morbidity and mortality, yet the psychophysiological pathways remain contested. This dissertation examines how social factors relate to vagally mediated parasympathetic activity indexed by heart rate variability (HRV) and tests whether conversational interventions with a human or a large-language-model (LLM)-based companion can acutely reduce loneliness and enhance connection. Across two university sites (BYU, UCSD), N=297 participants (18-27 years) were randomized to (a) a reciprocal self-disclosure conversation with a trained human confederate, (b) a parallel, vocalized LLM chatbot conversation, or (c) a non-social, vocal reading control. Resting HRV (RMSSD, SDNN, HF-HRV) was recorded …

Experimental And Theoretical Characterization Of Molten Salt Thermal Conductivity, Jacob C. Numbers

Theses and Dissertations

Molten salts form an ideal heat transfer fluid for advanced energy generation systems, including molten salt reactors (MSR). Accurate characterization of molten salt thermal conductivity is needed to confidently predict transient thermal behavior and optimize salt properties. Measurements are hindered by salts' challenging material properties, which---in the case of the needle probe device---induced unaccounted physical changes that limited its accuracy and repeatability. Sparse thermal conductivity data in general is exacerbated by a limited fundamental understanding of molecular energy transfer in liquids. This work extends the experimental capacity for compositional studies using the needle probe and proposes a theoretical model for …

Exploring The Potential Of Artificial Intelligence To Improve The Journal Peer Review Process, Eliza Fanny Bondah

Theses and Dissertations

Academic publishing depends on the peer review process to guarantee quality, scholarly rigor, and credibility, but the traditional peer review system receives mounting criticism because of its inefficient operations, biased judgments, and irregular standards. This study explores how artificial intelligence (AI) can improve journal peer review systems to solve a variety of issues, including reducing reviewer exhaustion, minimizing bias, improving consistency, and accelerating the review process. Current literature shows AI as a promising yet controversial solution, which may provide structured feedback with improved consistency and efficiency. Our study examined 52 human reviews together with 26 AI-generated reviews from EdTechnica--An Open …

Bayesian Alignment Prior To Connectionist Temporal Classification Loss, Lawry Sorenson

Theses and Dissertations

We propose revisions of Connectionist Temporal Classification (CTC) loss and forced alignment to support longer input sequences. CTC loss is normally used for training in speech and handwriting recognition tasks when the labels are not fully aligned with the data, while forced alignment is a downstream task that finds the optimal path for segmentation purposes. The current implementations consider all possible alignments between the input and label, which grows exponentially with the size of the input. We show that in cases when silence is removed and speaking rate is consistent, the true alignment is a mostly straight line across time …

Commutative Schur Rings Over Characteristic 2 Special Orthogonal Groups, Andrew Haviland

Theses and Dissertations

We study commutative Schur rings over the special orthogonal groups $\mathrm{SO}^{\pm}(n,2)$ that contain the class $\mathcal{C}$ of transvections. We show that the partition of $\mathcal{C}$ determined by a commutative Schur ring has either one or two parts. We classify all remaining partitions of $\mathcal{C}$ that could be determined by a commutative Schur ring.

In Their Own Voice: A Grounded Theory On Overcoming Internet Gaming Disorder, Jayson Carmona

Theses and Dissertations

Internet Gaming Disorder (IGD) is highly comorbid with depression, anxiety, sleep loss, lower productivity, and social isolation. The DSM-5 TR designates IGD as a condition for further study, however the ICD-11 has designed Gaming Disorder as a codified illness. While most studies look at IGD via a medical model lens focusing almost exclusively on symptomology, very little research explores the process of recovery in IGD. In this grounded theory inquiry, a theory of recovery from IGD is generated. Secondary internet data consisted of 113 posts on the subreddit /r/StopGaming on reddit.com. This resulted in 196 pages of data. Researcher used …

Ecological Drivers Of Habitat Selection And Maternal Survival In Female Mule Deer (Odocoileus Hemionus), Brady R. Knight

Theses and Dissertations

Understanding the ecological and biological factors that influence habitat selection by mule deer (Odocoileus hemionus) is crucial for effective management. Mule deer select cover, forage, and water, each critical to energy acquisition and survival of mule deer. Here, we evaluate the factors that influence habitat selection and reproductive decisions by mule deer . In chapter one we evaluate the influence of treatments to restore quaking aspen (Populus tremuloides) on habitat selection by mule deer. We hypothesized that mule deer would not use habitats randomly because of variability in nutrition and perceived risk of predation. We predicted that areas with aspen …

Unveiling The Genomic Blueprint Of Two Pantoea Agglomerans Phages: Lia And Yaegar As Emerging Members Of The Chaseviridae Family, Leslie M. Ewool

Theses and Dissertations

Bacteriophages represent an essential component of microbial ecosystems and a promising resource for biocontrol. This study presents a comprehensive comparative genomic and evolutionary characterization of two novel bacteriophages that infect Pantoea agglomerans, Lia and Yaegar, belonging to the Loessnervirus genus within the Chaseviridae family. Both Lia and Yaegar possess double-stranded DNA genomes of approximately 54 kb with 44.4% GC content and 82 predicted open reading frames (ORFs). Functional annotation revealed distinct modules for replication, structural assembly, and lysis, but no genes associated with lysogeny, antibiotic resistance, or virulence. Average nucleotide identity (ANI) analysis indicated over 96% similarity between Lia, Yaegar, …

Toward Understanding Multi-Agent Decision Making In Complex Societies, Jonathan Skaggs

Theses and Dissertations

This dissertation investigates Multi Agent Decision Making (MADM) within Complex Societies (CS), systems of interdependent agents whose collective behaviors emerge from local interactions. Such emergent dynamics are nonlinear and difficult to predict, posing significant challenges towards understanding how individual decisions scale to societal outcomes. Existing approaches often fall short of capturing the combined attributes of CS, including asymmetry, decentralization, and adaptivity. To address this gap, we introduce new models and analyses of agent strategies that explain how cooperation and stability can arise in CS. Structured around three interrelated projects, this dissertation enhances our comprehension of MADM in CS. The research …

Finding Black Joy: Understanding How Black Students Are Seen, Affirmed, And Nourished In Expanded Learning Opportunities., Jamila Mosley

Theses and Dissertations

This dissertation examines how Black students experience Black joy within expanded learning opportunity (ELO) programs and how those programs are structured to nurture that joy. It is guided by the central research question: How do Black students describe the ways in which an expanded learning opportunity program fosters their joy through experiences of being seen, affirmed, and nourished? Using an instrumental case study design at two secondary schools, the study draws on semi-structured interviews, focus groups, and observations of students participating in robotics, debate, Sister Circle, cheer, basketball, and creative writing. Data were analyzed through multiple cycles of coding, first …

History Of Midwifery In Arkansas: The Attrition Of Midwifery, Koria T.L. Robinson

Theses and Dissertations

Over the past few years, Arkansas has gained a spotlight due to an increase in maternal and infant mortality. This increase has been so massive that Arkansas has ranked within the top five in the nation for maternal and infant mortality rates for several years. A large percentage of the maternal and infant deaths in Arkansas are prevalent in the Black and rural communities. This is an issue that has plagued the state of Arkansas for over a hundred years, with mortality rates highly affecting the same demographic of people. How did the practice of midwifery become a remedy for …

A Space Propulsion Concept Based On Inertial Confinement: Exploring Nuclear Fusion Utilizing Polywell Geometry, Preeti Nair

Theses and Dissertations

Nuclear fusion propulsion represents a promising solution for future interplanetarymissions due to its high energy density and potential for continuous power generation. However, existing fusion propulsion systems face significant limitations, particularly in achieving stable plasma confinement. The Polywell concept, introduced by physicist Robert Bussard in 1985, offers advantages through its compact, polyhedral geometry that is wellsuited for spacecraft applications where mass and volume constraints are critical. Despite these advantages, Polywell designs have encountered stability challenges in maintaining the electric potential well over time. Plasma instabilities induced by magnetic fields disrupt containment and reduce fusion efficiency, limiting overall performance and scalability …

Beyond Binaries, Bridging Divides: Centering Identity, Resistance, And Educational Justice Along The Texas-Mexico Border. A Critical Autoethnography Of Underrepresented Intersectionality, Invisibility, And Transformation In Education, Alexander Hernandez

Theses and Dissertations

This dissertation employs solo autoethnography and counter-storytelling to examine how intersecting identities, queer, neurodivergent, bilingual, and fronterizo, shape lived experiences within U.S. educational spaces along the Texas–Mexico border. Grounded in Critical Race Theory as a historical foundation and guided by the braiding logic of Intersectionality (Crenshaw, 1989), the study integrates Latino Critical Race Theory (LatCrit), Disability Critical Race Studies (DisCrit), and Queer Theory to analyze how race, language, ability, and sexuality converge within systems of schooling.

Using memory-work, poetic autoethnography, and narrative vignettes as primary data, the dissertation traces how educational institutions discipline identity through racio-linguistic policing, behavioral surveillance, and …

Identity Formation Through The Lived Experiences Of Immigrant Muslim High School Students, Badera Muhanna

Theses and Dissertations

The growing number of Muslim students enrolled in U.S. public schools necessitates a more comprehensive understanding of their unique experiences within their educational environments. This phenomenological qualitative study investigated Muslim students' perceptions of their lived experiences in a high school in the Northern Great Plains of the United States. Six Muslim students in their junior and senior years were selected to participate in semi-structured interviews. Through the lens of Bronfenbrenner’s ecological systems theory, this study aimed to deepen understanding of how Muslim students develop their sense of identity and the factors that contribute to this development. The findings revealed that …

Toward An Anthropological Ecocriticism, Grant Mcmillan

Theses and Dissertations

Environmental storytelling has increasingly reckoned with concepts and assumptions about (N/a)ture inherited from the Western intellectual tradition. The late 2010s and early 2020s in particular have seen an explosion of fiction that interrogates the limits of these past ideas. Relatedly, ecocriticism of this period has entered a self-reflexive mode that has sought to deal with its own limitations while offering insights that may prove generative for a more general audience of environmentally minded readers. This project adds to ongoing ecocritical discourse by tracing a series of implicit affinities between the broad traditions of anthropology and environmental fiction through their shared …

Examining The Utility Of Haptic Feedback To Improve Pilot Situational Awareness & Performance: A Psychophysiological Approach, Jessica Van Bree

Theses and Dissertations

Pilot situational awareness (SA) has been deemed to be a critical component of flight efficacy, efficiency, and overall mission success. Studies have shown that several incidents and accidents have been the result of level-one SA errors, meaning that members of the flight crew have failed to accurately perceive the elements in their environments. As such, several strategies have been investigated to improve pilot SA. One potential avenue of research is the addition of haptics in to the flight deck. In some studies, the implementation of haptics have shown to improve piloting tasks, pilot safety, and aircraft control. The current study …

Looking At Teacher Knowledge, Skills, And Dispositions To Create School-Wide English Learning, Grace Elizabeth Allely

Theses and Dissertations

This dissertation-in-practice addresses the gap between teacher preparation and the rapidly growing multilingual learner population in U.S. public schools, where one in four students is classified as an English Learner yet only half of states mandate specialized teacher training for this population. Grounded in sociocultural learning theory, the know-do gap framework, and implementation science principles, this qualitative study investigates how the School-Wide English Learning (SWEL) peer coaching model bridges the divide between educators' theoretical knowledge and classroom application. Through focus group interviews with eleven general education teachers who participated in SWEL coaching for at least six months in Minnesota District …

Pfos And Lung Injury: A Review Of Human And Experimental Evidence, Farzana Hakim

Theses and Dissertations

Human epidemiological research has shown the adverse health consequences of long-term accumulation of per- and polyfluoroalkyl substances (PFAS) in human tissue. Specifically, this review will examine the relationship between PFAS exposure, impaired immune system functioning, and an elevated risk of respiratory disease using both human and experimental data. Research on human populations indicates that children exposed to PFAS have lower levels of antibodies to vaccines; those children prenatally exposed to PFAS are more susceptible to upper respiratory infections; and that adult humans have a higher incidence of chronic obstructive pulmonary disease (COPD). Additionally, experimental studies demonstrate that PFOS and PFOA …

Training Aba Service Providers To Use Phonemic Transcription: A Comparison Of Two Alphabets, Kristin Marie Albert

Theses and Dissertations

Applied behavior analysis (ABA) service providers regularly develop speech and shape articulation when working with minimally vocal children with autism. However, these providers usually have not received training in related subject areas as part of their certification coursework. This results in a gap between their scopes of competence and practice. The present study aimed to lessen this gap by training ABA service providers to take phonemic transcription. The author, in consultation with a speech-language pathologist, developed and implemented a computer-based programmed instruction training package. Studies 1 and 2 employed a concurrent multiple-probe design with an embedded adapted alternating treatments design …

Examining The Relationship Between Title 14 Code Of Federal Regulations (Cfr) Part 147 Maintenance School Aviation Maintenance Technician (Amt) Instructor Experience And Instructor Pass Rates For Airmen Certification Standards (Acs) Element Subject Areas, Richard Lyman Johnson

Theses and Dissertations

This quantitative, correlational study examined the relationship between Aviation Maintenance Technician (AMT) instructor experience and student pass rates in 14 CFR Part 147 maintenance schools. Data were collected from February to August 2025 using purposive and snowball sampling, which yielded 67 complete responses. Instructor experience, measured in months of A&P-rated maintenance work prior to teaching, ranged from 1 to 684 months (M = 253.54, SD = 197.97). Student pass rates, defined as the proportion of students passing ACS element subject area courses, ranged from .52 to 1.00 (M = .95, SD = .07). Most instructors were male, White, over 50 …

Voices Of Resistance: Multilingual Identity Formation Through Translanguaging In Dual Language Bilingual Education, Fernando W. Milmo

Theses and Dissertations

This qualitative case study explored how students navigated their evolving multicultural and multilingual identities in a setting with varying emphases on English and Spanish in the context of a fourth-grade dual language classroom where the teacher employed translanguaging pedagogy. This study is grounded in a theoretical framework that integrates decolonial, raciolinguistic, and translanguaging perspectives. The study examined students' perceptions of linguistic hierarchies and the ways they utilized their full linguistic repertoires to negotiate meaning, identity, and a sense of belonging. This study included pláticas as a culturally grounded narrative method, classroom observations, and interviews, and used a qualitative case study …

Deep Community Engagement: Faculty Responsiveness Perspectives At A Hispanic Serving Institution, Joseph Coppola

Theses and Dissertations

This qualitative, narrative inquiry investigates how experienced faculty members embody and enact responsive pedagogical practices at a community college Hispanic-Serving Institution (HSI). Despite generational poverty and low degree attainment among Latine students, institutions face mounting pressure from deficit-mindedness and political mandates that threaten educational equity and resources for HSIs. This research sought to answer: How do community college faculty teaching at a Hispanic Serving Institution exhibit attributes of responsiveness?

The theoretical framework utilized the core tenets of Paulo Freire’s critical pedagogy and integrated models from Gloria Ladson-Billings (culturally relevant pedagogy), Geneva Gay (culturally responsive teaching), Django Paris (culturally sustaining pedagogy), …

Hispanic Academic Leadership In The Health And Human Services, Gabriela Elizabeth Rangel

Theses and Dissertations

In the United States, there are 63.7 million Hispanics (U.S. Census Bureau, 2023), making them the largest racial or ethnic minority in the country. National data from 2019 indicates that only 6% of tenured faculty in the U.S. were Hispanic, highlighting a significant underrepresentation of leaders in academia (NCES, 2024). This study employed a phenomenological approach with purposeful sampling, utilizing semi-structured interviews with ten participants who had leadership experience in academia within Health and Human Services (H&HS). The interviews served to explore various aspects, such as what were their aspirations to become leaders, their perceptions of the characteristics and qualities …

Educators’ Perceptions Of Mental Health Services For Middle School Students In A South Texas District, Norma Araceli Cabrera

Theses and Dissertations

The purpose of this phenomenological qualitative study is to examine teachers' and administrators' perceptions of school-based mental health services in one school district in South Texas. Within-case sampling was utilized to select the participants. The study examines educators' perceptions of the availability and effectiveness of mental health services for middle school students. Middle school is a period of intense social development, during which students strive to navigate peer relationships. Middle school children, aged 12-14, also undergo emotional development as they manage intense emotions, develop self-awareness, and learn to cope with stressors related to school, friends, and self-identity. Studies found that …

Navigating Cultural And Professional Identities: A Study Of Hispanic Women's Experiences In Aerospace Internship Programs, Jennifer Becerra

Theses and Dissertations

This phenomenological study investigated how Hispanic women navigated cultural identity and professional development during National Aeronautics and Space Administration (NASA) internship programs, examining the role of culturally responsive mentoring in supporting retention. The research question was, How do Hispanic women in aerospace-internship programs navigate the intersection of cultural identity and professional development as they transition from academic science, technology, engineering, and mathematics (STEM) programs to aerospace careers, and what role does culturally responsive mentoring play in supporting their retention?

Using Anzaldúa’s nepantla concept, Duncan-Andrade’s critical-hope theory, and Ladson-Billings’ culturally relevant pedagogy as theoretical frameworks, in this study, I employed semistructured …

Collective Agency And Community Resilience Among Farmworkers In The Lower Rio Grande Valley, Angel Velazquez

Theses and Dissertations

This research assesses how farmworkers in the Lower Rio Grande Valley of Texas use everyday practices to build resilience and adapt to changes in their lives. I apply two interconnected theories, White’s (2017, 2019) framework of collective agency and community resilience and Castro and Sen’s (2022) framework of everyday adaptation actions, to study these practices. I conducted 19 semi-structured interviews with Latino farmworkers and professionals who work with local farmworker organizations in the Rio Grande Valley (RGV) of Texas. Interview transcripts were analyzed to determine if and how Latino farmworkers in the RGV can work towards community resilience and implement …