Digital Commons Network^™

Fabrication Of Su-8 Electrically Actuating Membranes, Tyler James Adams

Theses and Dissertations

This work investigates SU-8 polymer waveguides as a fabrication platform for integrated optical structures. Surface roughening using oxygen plasma etching is used to induce controlled optical scattering, enabling direct observation of guided modes and providing insight into waveguide behavior. Building on this, waveguide geometry is modified through an elevated scattering region (ESR) design, which reduces transition losses and improves scattering efficiency by preserving optical volume within the guiding region. In parallel, suspended SU-8 membranes are fabricated and evaluated for mechanical stability, providing a platform for integrating optical structures beyond conventional substrate-bound configurations. These membranes are further characterized under electrostatic actuation, …

Understanding The Role Of Tiktok As A Source Of Support For Cyberbullying Victims, Saba Iqbal

Theses and Dissertations

Cyberbullying poses a significant threat to teenagers and young adults, who often seek support and advice online. Little is known about the support and advice shared online for victims of cyberbullying and whether it is helpful. In this study, we used qualitative thematic analysis to examine a sample of 150 TikTok videos that give support or advice for cyberbullying victims. We identify 33 unique pieces of support and advice across 5 categories, with differences in tone and delivery among different types of videos. We then evaluated the quality of 33 unique pieces of cyberbullying advice in a user study with …

Democratizing National Water Model Streamflow Forecasts Through Cross-Platform Mobile Application Development, Jerson J. Garcia

Theses and Dissertations

The National Water Model (NWM) provides operational streamflow forecasts for 2.7 million stream reaches across the continental United States, yet technical barriers prevent widespread public access to this hydrological infrastructure. This paper presents RIVR (River Information Visualization and Risk), a cross-platform mobile application that transforms National Water Model forecasts into an accessible interface for non-technical users. Built with Flutter, the application deploys to iOS and Android from a single codebase and integrates NOAA forecast APIs, CIROH return-period thresholds, and interactive vector-tile mapping. Performance evaluation across six metrics: application size, startup time, memory consumption, rendering frame rates, API response times, and …

Hybrid Bermudagrass Dormancy Management In A Cool-Season Climate, Clarissa H. Peterson

Theses and Dissertations

Hybrid bermudagrass (Cynodon dactylon [L.] Pers. × C. transvaalensis Burtt Davy) (HBG) is a water efficient warm-season turfgrass increasingly adopted in cool-season and semi-arid regions due to climate change and the demand for reduced irrigation inputs. However, prolonged winter dormancy limits its visual quality (verdure) and seasonal performance. This thesis evaluated multiple management strategies to modify dormancy dynamics and improve off-season turf quality in a cool-season environment. Field experiments assessed the effects of growth covers, fertilizers, colorants, surfactants, organic acids, and overseeding with cool-season species on HBG dormancy over two seasons. Dormancy responses were quantified using normalized difference vegetation index …

Path Planning And Control For Vertical Takeoff And Landing Aircraft, Dean Benjamin Anderson

Theses and Dissertations

One of the challenging problems of unmanned aerial vehicles (uav) is controlling vertical takeoff and landing (vtol) aircraft. Vtol aircraft can take off and land without landing strips while retain the efficiency of fixed-wing airplanes for long range flight. Unfortunately, the transition from takeoff and forward flight, and from forward flight to landing, is an extremely difficult control problem. Most current controllers for transition switch between flight regimes based solely on airspeed. The trajectory for such switching transitions is a straight vertical ascension followed by a straight forward startup flight; it does not allow for the development of more complex …

Real-Time Data Collection System For Low-Cost Diesel Emissions Monitoring, Zachary Driskill

Theses and Dissertations

Diesel trucks are a major source of pollutants, including particulate matter (PM) and NO$_x$. Roadside emissions monitoring can identify high-emitting diesel vehicles, but conventional sensing systems rely on expensive, complex sensing instruments that limit widespread deployment. Low-cost sensors offer increased scalability due to their small size, low cost, and low power consumption, but they have lower accuracy and slower response time. This thesis presents the design and evaluation of a low-cost roadside emissions monitoring system, establishing the foundation for a scalable and widely deployable alternative. We apply machine learning calibration to roadside emission monitoring to improve the usability of low-cost …

Implementation And Evaluation Of Alternative Methods For Simulation Of Sidescan Sonar, Blake Paul Romrell

Theses and Dissertations

The original sonar implementation for the HoloOcean simulator was built upon a cached octree representation of the world. On first runs, building the cache was prohibitively slow, and the cache had a major memory footprint. This work presents alternative implementations for the sidescan sonar using direct raytracing on the CPU and rendering on the GPU. To evaluate and compare the implementations, timing tests on comparable parameters, as well as sweeps on resolution and range parameters, were performed. The render-based GPU implementation outperformed the others in the timing tests.

Leveraging River Forecast Center Knowledge To Improve Large-Scale Hydrologic Model Performance Through Bias Correction, Ian Mathews

Theses and Dissertations

The National Water Model (NWM) provides continental-scale streamflow predictions but exhibits bias and reduced skill in highly regulated and snow-driven basins. In contrast, River Forecast Center (RFC) models incorporate decades of local calibration and regulatory knowledge but are limited in spatial coverage to specific points of interest. This study evaluates whether hydrologic knowledge embedded in RFC-calibrated simulations can be transferred to improve NWM performance at unmonitored locations using the Streamflow Analysis for Bias Estimation and Reduction (SABER) framework. Using Colorado Basin River Forecast Center (CBRFC) simulations as surrogate reference data, we applied SABER to the NWM 44-year retrospective model simulation …

Advancing Cyclic Ion Mobility Mass Spectrometry For Structural Characterization, Isomer Discrimination And Gas-Phase Ion Chemistry, Sudam Shivaji Mane

Theses and Dissertations

This dissertation focuses on the development and application of high-resolution ion mobility-mass spectrometry (IMS-MS) methodologies for gas-phase separation and structural characterization of small molecules, with particular emphasis on epimers, positional isomers, and protomers. In addition to structural separations, this work investigates fundamental aspects of gas-phase ion chemistry using IMS-MS in combination with collision-induced ion activation and dissociation techniques. Advanced separations were performed using cyclic traveling-wave ion mobility spectrometry (cyclic TWIMS), implemented in a commercial cyclic ion mobility-mass spectrometry (cIMS) platform, to systematically evaluate both the capabilities and limitations of high-resolution IMS in resolving subtle structural differences. Initial studies demonstrated that, …

Redox Reprogramming In Neurogenesis: Candidate Developmental Switches And Targets Of Oxidative Toxicity In The Redox Proteome, Ryan Jacob Summerhays

Theses and Dissertations

Neurogenic differentiation requires coordinated redox regulation, yet how reversible cysteine oxidation is remodeled at proteome scale during this process remains poorly defined. Here, we asked whether differentiation is associated with selective, site-specific changes in reversible cysteine oxidation and whether oxidative stress reveals developmentally conditioned vulnerabilities within this redox landscape. To address this, we applied a discovery-oriented, proteome-scale redox profiling strategy that quantifies condition-dependent changes in reversible cysteine oxidation using CysPAT labeling, phosphopeptide enrichment, and multiplexed TMT mass spectrometry. Neurogenic differentiation was characterized by reproducible, bidirectional, and highly site-specific remodeling of reversible cysteine oxidation at discrete regulatory nodes, as well as …

Practical, Scalable, And Cost-Effective Nanolc-Ms Workflow For Single-Cell Proteomics, Siqi Huang

Theses and Dissertations

Single-cell proteomics provides a novel research strategy for decoding cellular heterogeneity, revealing the molecular mechanisms of rare cell subpopulations, and studying the dynamic responses of cells to external stimuli. However, compared to transcriptomics, single-cell proteomics faces even more challenging technical challenges: extremely low protein amount in single cells, wide dynamic range, significant adsorptive losses during sample preparation, and the complex matrix and trace sample injection demanding extremely high stability and sensitivity from the separation and detection systems. Mass spectrometry-based bottom-up proteomics has become an important tool for analyzing complex biological systems, and nano-flow liquid chromatography-mass spectrometry (nanoLC-MS) exhibits unique advantages …

Cebuano For Missionaries - Missionary Training Center Grammar Book, Jaden Sigua

Instructional Psychology and Technology Graduate Student Projects

This project presents the design and development of Cebuano for Missionaries, a grammar resource created to support language instruction at the Missionary Training Center (MTC). The purpose of the project was to align grammar instruction with communicative missionary tasks and support learners in achieving Intermediate-Low proficiency on the ACTFL scale. The resource was developed using an iterative design process informed by stakeholder interviews, task analysis, and pilot testing. Key design features include simplified grammar explanations, visual reference charts, and task-based study activities to support classroom instruction, tutoring, and independent study. The project also outlines implementation plans, evaluation strategies, and …

Differentials As Models: Constructing A Differentials-Within-Limits Framework For First-Year Calculus And Examining Students' Understanding Of Limits, Differentials, And Derivatives Within It, Alexander A. Swindler

Theses and Dissertations

Work in first-year calculus has clearly shown the power that treating differentials (such as dx) as tiny quantities affords for first-year calculus learning, yet a traditional limits-based approach leaves no room for them. While some researchers have loosely described informal differentials and limits within the same paradigm, their actual conceptual definitions and relationships have not been explicitly constructed. Continued progress in this area could benefit from theoretical consideration of (a) providing clearer intuitive definitions for differentials inside a limits-based approach to calculus, and (b) defining more exactly the relationships between differentials and limits. In this study, I propose a theoretical …

"Deep In The Trenches": A Multi-Perspective Interpretive Phenomenological Analysis Of Student Mothers Navigating The Hidden Realities Of Postpartum Anxiety, Rhonda Harris

Theses and Dissertations

Despite availability of effective treatments women with postpartum anxiety (PPA) commonly go untreated because of barriers to care. Student mothers are a particularly vulnerable subgroup of women as they tend to be younger, are less likely to be married, and have lower incomes than non-student mothers. As anxiety rates in college women are higher than the general population and higher than college men, student mothers are at high risk of the adverse effects of untreated PPA. There is a paucity of existing literature about student mothers and mental health. The aim of the current study is to understand the help-seeking …

Budgets Vs. Bullets: Divergent Effects Of Economic And Security Threats On Nationalism, Mary Moody

FHSS Mentored Research Conference

Existing literature argues that the presence of threats increase levels of (patriotic) nationalism. However, there are different kinds of threats, whose presence may instead reduce nationalist and isolationist attitudes. We argue that economic threats will raise levels of nationalism, while security threats will decrease nationalism and increase internationalism. We find that, across Europe, those who were more concerned about economics as a result of the Ukraine War were more Eurosceptic and nationalist, whereas those who were more concerned about security had an increased desire for European cooperation. In an original survey experiment in Poland, we find that a treatment priming …

Sidestepping Implicit Bias Through Website Design, Bethany Sycamore

Instructional Psychology and Technology Graduate Student Projects

This design project redesigned the website for a private medical practice with the intention of improving user experience and decreasing the impacts of implicit bias against one of the practice's physicians.

A Place To Breathe: High School Students’ Perceptions Of A School-Based Wellness Center, Devan Clayton, Elizabeth Cutrer, Paul Caldarella, Michael Richardson, Jared Warren

Faculty Publications

Adolescents face significant academic and emotional stressors, underscoring the need for accessible school-based mental health support. This qualitative study examined high school students’ (N = 17) perceptions of a school-based wellness center, including both users and non-users. Four focus groups were analyzed using Interpretative Phenomenological Analysis to explore experiences, perceived benefits, and barriers to use. Students described the center as a calming, supportive space that aided emotional regulation, short-term recovery, and readiness to return to class. Users emphasized relational connection, belonging, and managing stress and anxiety in a safe, nonjudgmental environment. Students also viewed the center as fostering early …

No Principal Left Alone: Exploring Elementary Principals' Relationships With Their Full-Time Assistant Principals, Shauna Worthington

Theses and Dissertations

Elementary school principals are often the only administrator in their building; therefore they are left to face the adverse circumstances of their job without the support of an administrative colleague at their school. However, U.S. nationwide data suggests that school districts are more frequently hiring elementary assistant principals. This paper explores perceptions of elementary principals about the nature and dynamic of their relationships with their full-time assistant principals, including accompanying benefits and challenges. This qualitative inquiry utilizes an exploratory, descriptive, phenomenological approach and features the results of in-depth interviews with 20 elementary school principals in two large suburban public school …

Entwurzelt, Melanie Fischer

Theses and Dissertations

Entwurzelt (Uprooted) is an installation that explores the emotional landscape of displacement-trauma, grief, and the search for belonging in the aftermath of war and unrest. The vessels in this installation evoke the presence of a forest--each one a symbolic tree, rooted in memory and shaped by personal and collective histories. Being torn from the familiar means leaving behind everything except memories and carrying a void that may never be fully filled. Yet, in unfamiliar places, fragments of comfort can be found--echoes of what once was. For me, the forest is more than a memory--it is a bridge between past and …

Fallow Ground, Eli Kerns

Theses and Dissertations

Fallow Ground refers to the agricultural practice of intentionally leaving a field unseeded for a year or more in order to restore fertility and interrupt cycles of depletion. Although fallowing is a beneficial and necessary practice, the term has also come to signify waste or a lack of productivity. This double meaning is central to the work, reflecting a central contradiction: that withdrawal can be as vital as effort, and that rest, like labor, can function as a deliberate and sustaining act. The question I explore in this work is how to organize, understand, and live with these contradictions. Through …

Reconsidering The Take It Down Act, Cate Thorpe

Brigham Young University Prelaw Review

In the past decade, there has been an increase in digital forgeries leading to the phenomena many have called “revenge porn.” This form of Nonconsensual Intimate Imagery (NCII) has been facilitated by AI-models that allow users to create false images or videos of someone’s likeness, often referred to as deepfakes. In an attempt to combat the dissemination of such forged NCIIs, Congress enacted the TAKE IT DOWN Act. The Act institutes a notice-and-removal procedure for victims to request the removal of  NCIIs depicting their likeness on covered platforms. While the TAKE IT DOWN Act sufficiently addresses some concerns, certain aspects …

Mobility Without Retention: Reforming The Compact Of Free Association To Address Human Capital Flight, Ellery Miller, Porter O'Reilly

Brigham Young University Prelaw Review

In the aftermath of United States nuclear testing in the Republic of the Marshall Islands (RMI), which rendered several atolls uninhabitable, the country now confronts a different threat: sustained human capital flight. To compensate the RMI for nuclear damages, the United States signed into law the Compact of Free Association (COFA), a treaty structured around three core commitments: (1) defense and security, (2) economic assistance, and (3) unrestricted migration rights. Under COFA, Marshallese citizens may live and work in the United States without a visa, which has resulted in large-scale outmigration of the working-age and educated population. This Note argues …

Rethinking Antitrust In The Age Of Fintech, Quaid Knell, Olivia Mossman

Brigham Young University Prelaw Review

In cases involving large technology firms, current antitrust laws are proving difficult to enforce when applied through the traditional framework of price-centered metrics. Financial technology (fintech) companies are firms that integrate digital technology into financial services and operate through multi-sided platforms, and they are growing in number. This increased number of firms introduces the next challenge for antitrust enforcement, as traditional definitions of market dominance and monopolistic behavior are ill-suited to the realities of the digital landscape. Although there are no current antitrust lawsuits against major fintech firms, their existing structures and business models, if left unexamined, allow these firms …

“Loophole Of The Century”: Routine Use And The Privacy Act Of 1974, Joslynn Jensen

Brigham Young University Prelaw Review

This Note examines structural weaknesses in the Privacy Act of 1974 and argues that the statute no longer provides meaningful safeguards for personal information held by federal agencies. Enacted in the aftermath of the Watergate scandal, the Act was designed to ensure transparency, accountability, and individual control over government recordkeeping systems. However, two core features—the routine-use exception and the Act’s narrow remedial structure—have undermined these protections. The routine-use provision permits agencies to disclose personal records without individualized consent so long as the disclosure is deemed “compatible” with the purpose of collection and published in the Federal Register, a form of …

Observational Diagnostics And Spectroscopic Detection Of Tropospheric Trace Gases And Oxidation Processes, Callum E. Flowerday

Theses and Dissertations

The troposphere is governed by photochemical and radical-mediated processes that control atmospheric oxidation capacity, secondary pollutant formation, and the chemical lifetime of gases. Quantitative understanding of these processes requires both robust observational frameworks capable of resolving complex precursor–product relationships and instrumentation with sufficient sensitivity and selectivity to detect reactive and low-concentration species. This dissertation advances atmospheric chemistry through the parallel development of quantitative observational methodologies and refined spectroscopic measurement techniques. The first component of this work evaluates atmospheric oxidation systems using long-term monitoring data and empirical diagnostics. Multi-year analyses of ozone and particulate matter trends were conducted to characterize variability …

The River Of Life In Flannery O'Connor's "The River", Abbi L. Peo

Undergraduate Honors Theses

This thesis examines the role of the River in “The River” by Flannery O’Connor.  O’Connor’s fiction consistently explores the workings of grace and “The River” is no exception. In the story, the River functions as a metaphor for Christ’s grace. Most literary critics focus on the disconcerting drowning of the young protagonist, Harry Ashfield, an example of O’Connor’s signature use of the grotesque to facilitate her characters’ encounters with grace. However, this emphasis on Harry often obscures the broader role of the River within the narrative. When the story’s analysis is limited to Harry’s death, critics overlook how the River …

Faculty-Student Collaboration In Iterative Course Design, Sarah Mcdavitt

Undergraduate Honors Theses

Typically, the only way for a professor to receive feedback on their course design is through running several iterations of a class across multiple semesters. This guide aims to establish an avenue for accelerated course design testing through faculty-student collaboration before it rolls out live for enrolled students. Using the design thinking framework and other human-centered design principles, faculty members collaborating with students can iterate course design elements to discover opportunities to enhance the learning experience. As they draw evidence-based conclusions from empathy data, accurately define objectives, ideate new solutions, prototype course element ideas, and test the prototypes with a …

Software-Defined Radios In Avalanche Detection, Andrew Mcdonald

Undergraduate Honors Theses

This thesis explores the use of software-defined radios (SDRs) to develop a low-cost radar system for avalanche detection. Avalanches are a significant danger in mountainous locations and existing systems are often difficult or expensive to use. This research assesses if commercially available SDRs can be used to create a radar system capable of detecting moving targets and accurately measuring distance. A frequency-modulated contiuous-wave (FMCW) radar was implemented using the LimeSDR-Mini and the USRP B210. Signal generation, data collection, and processing all are performed in software, enabling easy configuration. Improvements to data transfer methods for the LimeSDR-Mini reduced sampling errors and …

Self-Reported Longest-Held Occupation Type In Relation To Epilepsy In Late Life: A Pooled Cohort Analysis Of Incidence And Prevalence, Daniel Guerrero Gutierrez, Sofia Pelagalli Maia, Hyunmi Choi, Jose Gutierrez, Natalie Bello, Mary L. Biggs, Emily M. Briceño, James F. Burke, Lisandro D. Colantonio, Mitchell S.V. Elkind, Annette L. Fitzpatrick, Christopher Gonzalez, Alden L. Gross, Lei Huang, Emily L. Johnson, W. Craig Johnson, Cheng-Shiun Leu, Deborah A. Levine, Minghua Liu, W.T. Longstreth Jr., Richard P. Mayeux, Sylwia Misiewicz, Dolly Reyes-Dumeyer, Tatjana Rundek, Danurys Sanchez, Steven J. Shea, Tian Wang, Carolyn W. Shu, Evan L. Thacker

Library/Life Sciences Undergraduate Poster Competition 2026

Epilepsy in late life is influenced by biological, behavioral, social and environmental factors

Lifetime occupation type may capture socioeconomic, environmental, and long-term physical exposures relevant to brain health (e.g., manual labor, stress levels, neurotoxic exposures) that could influence neurological aging

Development Of Seed Coating Technologies & Seeding Techniques To Improve Wildlife Habitat In The Sagebrush Steppe, Sage Johansen, Curtis Garlick, Corban Gibson, John Stromberg, Ryan Glover, Melissa Burrell, April Hulet, Brad Geary, Matt Madsen

Library/Life Sciences Undergraduate Poster Competition 2026

Honorable Mention - Poster Design

• The sagebrush steppe biome is disappearing at a rate exceeding 500,000 hectares per year. Restoring these degraded areas through the reseeding of native vegetation is essential for preserving wildlife habitat and maintaining critical ecosystem services. However, seeding efforts often end in failure, especially in hotter and drier parts of the sagebrush steppe.
• Rangeland seeds typically are sown near the soil surface, where the seed and unemerged seedlings experience high mortality due to factors such as seed predation, drought, freeze-thaw cycles, and pathogens. Seedlings also struggle to emerge from the soil due to soil crusting.
• However, …