Digital Commons Network^™

Opposing Roles For Iron Transport Systems In Gallium Tolerance In Extraintestinal Pathogenic Escherichia Coli, Nagama Parveen

Theses and Dissertations

Iron is required for bacterial growth because it serves as a co-factor for enzymes involved in DNA synthesis, cellular respiration, and other processes. Disrupting bacterial iron homeostasis is an effective strategy to prevent the growth of antibiotic-resistant bacteria, and gallium (Ga³⁺) has emerged as a promising candidate due to its ability to displace iron (Fe³⁺) and prevent essential iron-dependent pathways. However, Escherichia coli are naturally less sensitive to gallium than many other bacteria, and the mechanisms that control gallium tolerance are not completely understood. To address this, we performed a genome-wide transposon sequencing (TnSeq) screen to identify genes important for …

Feasibility Of A Novel Combined Treatment For Apraxia Of Speech, Claire Evans Jensen

Theses and Dissertations

Apraxia of speech (AOS) is a disorder of articulation and prosody interrupting the spatial and temporal planning and/or programming of speech movements and commonly co-occurs with aphasia. Most AOS treatment research has used single case experimental designs (SCEDS) to document the effects of treatment. The strength of SCEDs is that they can demonstrate clear causal relations between intervention and behavior change. The most studied AOS treatment is an articulatory-kinematic treatment called Sound Production Treatment (SPT). This study was designed to examine the effects of a novel treatment, Sound Production Treatment in a Metrical- Paced Frame (SPTMF), on the speech production …

Predicting The Yield Strength Of Aluminum Alloys Based On Composition, Clinton K. Waite

Theses and Dissertations

This work describes a model to predict the yield strength of aluminum alloys, in either an annealed or T6 (peak aged) state, based solely on its composition. This is accomplished through the analyses of strengthening mechanisms common to aluminum, of which a novel semi-empirical model to predict precipitation strengthening is discussed. Solid solution strengthening and grain boundary strengthening are more simplistically considered but with significant accuracy. It is shown that by combining the strength contributions of each strengthening mechanism, the overall yield strength can be predicted by its composition in any of the 1xxx-7xxx series alloys. This allows the model …

Recent Advances In Developing Cell-Free Protein Synthesis Biosensors For Medical Diagnostics And Environmental Monitoring, Tyler P. Green, Joseph P. Talley, Bradley Charles Bundy

Faculty Publications

Cell-free biosensors harness the selectivity of cellular machinery without living cells’ constraints, offering advantages in environmental monitoring, medical diagnostics, and biotechnological applications. This review examines recent advances in cell-free biosensor development, highlighting their ability to detect diverse analytes including heavy metals, organic pollutants, pathogens, and clinical biomarkers with high sensitivity and specificity. We analyze technological innovations in cell-free protein synthesis optimization, preservation strategies, and field deployment methods that have enhanced sensitivity, and practical applicability. The integration of synthetic biology approaches has enabled complex signal processing, multiplexed detection, and novel sensor designs including riboswitches, split reporter systems, and metabolic sensing modules. …

Classification And Analysis Of Families Of Graphs With Focus On Nordhaus-Gaddum Bounds, Sibi Pranav Muthuprakash

Theses and Dissertations

Nordhaus-Gaddum type problems focus on bounding characteristics of graph and its complement. There are certain families of graphs which yield optimal upper bounds on various Nordhaus-Gaddum characteristics of graph. In this paper, we will talk about bounding combinatorial algebraic connectivity, normalized algebraic connectivity, the Cheeger constant, and the isoperimetric number of a graph and its complement. We will identify some optimal or near optimal families of graphs and conduct an analysis on these families that will help to bound these characteristics. We will also prove and conjecture some bounds that can help in formulating stronger bounds on these characteristics of …

Understanding Administrator Approaches To Trauma-Informed Care: Findings From A Mixed Methods Study, Megan Coalwell

Theses and Dissertations

Traumatic events during childhood have been termed adverse childhood experiences (ACEs). Experiencing traumatic events or ACEs is common for school-aged children. Research reports indicate that as many as two out of three children will experience at least one traumatic event by the time they are eighteen. The negative effects of experiencing trauma are well documented. Trauma can lead to long-term outcomes in adults such as chronic health problems, mental health problems, substance misuse, and even early death. During childhood, it can lead to internalizing and externalizing problems, as well as difficulties in school. Trauma-Informed Care (TIC) is an approach to …

Flowdb: A Complete Method For Extracting Queries From Functional Programs, Koby J. Lewis

Theses and Dissertations

Programmers working on database-backed applications frequently face trade-offs between designing maintainable software and efficient software due to the overhead of querying a database. We demonstrate FlowDB, an analysis for database-backed programs that can aid in program transformations that allow a program to be written in a maintainable style while still being performant. FlowDB employs demand-driven control flow analysis (DCFA) to produce a set of query sites that may be evaluated during the execution of a program. This set of query sites may then be used by a developer or compiler to cache needed results.

An Active Quasi-Circulator Ic And Technique For 1-255 Mhz Resonance-Based Spectroscopic Impedance Plethysmography, Sharisse Poff

Theses and Dissertations

Impedance measurement is a promising avenue for noninvasive glucosemonitoring. Specifically,resonance-basedimpedancemeasurements exhibit good correlation with glucose levels at excitations from tens of MHztoover 100 MHz. Additionally, plethysmographic impedance measurements are needed to separate arterial blood signals, which contain strongerglucose information, frominterstitialfluidsignals. Weanticipate that plethysmographic measurements across a range of frequencies— spectroscopic plethysmography—at excitations from tens to over 100 MHz could enable resonance-based monitoring with higher selectivity for arterial glucose than previous work. Afour-point impedance measurement circuit is designed, and its ability to measure constant and periodically time-varying impedance is demonstrated. This circuit presents high impedance to the device-undertest (DUT), which fails …

Hearing From Working Nurses: Incorporating Real-World Knowledge Practices Into The Framework To Better Instruct Tomorrow's Healthcare Professionals, Anne R. Diekema, Elizabeth (Betsy) S. Hopkins, Britt Fagerheim, Brandon Patterson, Nena Schvaneveldt

Faculty Publications

There is a certain duality to the role of librarians in higher education as the job requires preparing students for their current academic work, such as doing research for writing papers, while at the same time preparing students for their future professional information work. Librarians seeking guidance on teaching information literacy more comprehensively are left to study the professional standards of the targeted professional group, and find or carry out research on these practitioners. Synthesizing and translating these findings into instructional approaches while staying true to existing information literacy standards, however, can be challenging. In this chapter we demonstrate how …

The Effects Of A Tier 2 Intervention On The Behavior Of Elementary School Students Participating In Second Step: Enhancing A Schoolwide Social-Emotional Learning Curriculum, Charlotte Annalee Kennington

Theses and Dissertations

After reviewing the current research literature on the effects of social-emotional learning (SEL) on the behavior of elementary-age children, it was clear that there was limited research data on the effects of Tier 2 interventions designed to augment the effects of schoolwide SEL programs. Specifically, to what extent could a brief, group-delivered intervention improve the academic engagement, problem behavior, and socially appropriate comments of fifth-grade students receiving schoolwide SEL through Second Step in a traditional public school? Three fifth-grade students were recruited to participate in this study who all engaged in frequent problem behavior during Second Step lessons and throughout …

Impact Of Non-Uniform Surface Temperature On The Apparent Radiative Properties Of Cavity Receivers, Ehsan Mofidipour, Matthew R. Jones, Brian D. Iverson

Faculty Publications

Radiative surface properties play a critical role in the design, analysis and optimization of solar–thermal systems. Cavity receivers increase the efficiency of solar–thermal energy systems through the cavity effect. The cavity effect refers to increased absorption of radiation due to multiple reflections within a cavity. Apparent radiative surface properties of a cavity characterize the effective interactions of radiation passing through an imaginary surface covering the cavity aperture. In this study, we investigate the extent to which the apparent emissivity of a cavity with a non-uniform surface temperature profile may be estimated using an isothermal enclosure model. A cylindrical cavity was …

The Silent Grief Of Grandmothers After An Out-Of-Order Death—An Interpretative Phenomenological Analysis, Jordan Robertson, Elizabeth Cutrer, Paul Caldarella, Jeremy B. Yorgason, Terrell Young, Erjola Gjini, Sarah Stuart, Savannah Tueller

Faculty Publications

This study delves into the lived experiences of grandmothers grappling with grief following the “out-of-order” death of a child, child-in-law, or grandchild, using an Interpretative Phenomenological Analysis grounded in the Dual Process Model-Revised. With 70% of U.S. adults over 65 being grandparents, the research highlights their often-invisible role as both grievers and caregivers amid family loss. Findings reveal three key themes: navigating personal grief, intergenerational support dynamics, and reconstructing family identity. Grandmothers oscillate between loss-oriented and restoration-oriented coping, with grief intensity varying by relational proximity—most profound when losing their own child. They provide emotional and practical support to surviving grandchildren, …

Commitment And Betrayal In Intimate Relationships: A Grounded Theory Analysis, Megan Van Alfen Brown

Theses and Dissertations

Commitment and betrayal are key aspects of a relationship that have impact on the quality or health of the relationship. The purpose of this paper was to use qualitative grounded theory methods to explore how commitment and betrayal are experienced in intimate relationships and to explore the outcomes of both. The data were taken from a larger project on healthy and unhealthy relationships where participants were recruited through convenience and theoretical sampling. Semi-structured interviews were conducted and constructivist grounded theory methods were used to code, generate, and refine prominent categories in the data. Findings revealed that commitment is experienced through …

Characterizing Host And Viral Factors Relevant To Turkey Hemorrhagic Enteritis Virus-Induced Immunosuppression, Abraham Quaye

Theses and Dissertations

Turkey hemorrhagic enteritis virus (THEV) is an adenovirus (AdV) that causes hemorrhagic enteritis (HE) in turkeys, a debilitating disease affecting predominantly 6-12-week-old turkey poults characterized by immunosuppression (IMS) and intestinal lesions leading to bloody diarrhea. Although a naturally-occurring avirulent THEV strain has been adopted as live vaccine and has proven effective at preventing HE in turkeys, it still retains its immunosuppressive ability. Thus, vaccinated birds are rendered more susceptible to opportunistic infections and death than unvaccinated cohorts, leading to substantial economic losses. This dissertation focuses on elucidating both host and viral factors mediating THEV-induced IMS in turkeys. As THEV gene …

Characterizing Gastric Cancer Tumor Immune Microenvironment Through Extracellular Vesicles, Claire Elizabeth Bruno

Theses and Dissertations

The tumor immune microenvironment (TIME) critically influences cancer progression and determining therapeutic response. As immunotherapies continue to improve and reshape cancer treatments, there is a need for tools that can more efficiently and accurately assess and monitor the TIME. Extracellular vesicles (EVs), especially small EVs (sEVs), are lipid-bound nanoparticles that carry proteins, DNA, and RNA reflective of their cell of origin, offering a novel, non-invasive biomarker of the TIME. This makes them a promising candidate for immune profiling and treatment monitoring in cancer. This thesis investigates the potential of EVs as biomarkers for TIME composition and immune activity. An analysis …

Modeling Steady-State Navier-Stokes Flow Using Structure-Preserving Truncated Hierarchical B-Splines, Daira Sofia Velasco Vega

Theses and Dissertations

Accurate simulation of incompressible steady-state fluid flow is critical for engineering applications where mass conservation, numerical stability, and geometric fidelity are essential. This thesis develops and analyzes a structure-preserving isogeometric framework for steady-state incompressible Navier"“Stokes simulations using truncated hierarchical B-splines (THB-splines). By leveraging divergence-conforming spline spaces designed to keep the fluid's divergence exactly zero based on the mathematical de Rham complex, this method ensures the fluid remains incompressible everywhere without needing extra stabilization techniques. The use of THB-splines allows the mesh to be refined locally in areas where the flow changes sharply. It still keeps the solution smooth and ensures …

Constructing Sculptural Wearables: Indigenous Steam Education At The Intersection Of Art And Science, Patricia Andersen

Theses and Dissertations

This paper describes an approach to STEAM education in which art is viewed as a unique discipline with distinct ways of thinking. The researchers developed and evaluated a STEAM education program to explore how art and science work together to expand and accelerate inventive thinking among Native American middle school students who participated in American Indian Services (AIS) Pre-Freshman Engineering Program (PREP). An important context of this project was the unique local environment and culture that included Diné (din-eh) culture in Gallup, NM. We hypothesize that integrating culturally responsive transdisciplinary art into an existing STEM summer program will increase students' …

Belonging Starts With You: Exploring Trust, Belonging, And Spiritual Connection In The Success Of Culturally Diverse Students In Higher Education, Moises Aguirre

Theses and Dissertations

Cultivating trust and belonging is essential for student success in higher education, particularly for students from diverse cultural backgrounds (DCB) who face unique challenges in developing these connections. Research highlights lower levels of trust reported by DCB students toward peers and institutions, adversely impacting their academic performance and social integration (Van Maele & Van Houtte, 2010). The urgency of these issues is underscored by the demographic evolution in Utah's educational system, with projections indicating significant growth of students' diversity by 2065 (Hollingshaus et al., 2019). Because of these projected developments, this study investigates how DCB students conceptualize and experience trust …

What's The Joke Princess?: A Qualitative Analysis On The Comic Representation Of Women In Disney Sitcoms, Julia J. Lee

Theses and Dissertations

This thesis investigates the comedic representation of women in recent Disney sitcoms (2019"“2025), focusing on the framing devices, stereotypes, and situational contexts through which gendered humor is constructed and reinforced. Drawing from existing literature on comedic archetypes, the study identifies six historically dominant comedic frames and reveals eleven emergent subframes that complicate, reinforce, or expand these traditional portrayals. Through qualitative content analysis and systematic coding of selected Disney sitcoms, this study identifies consistent character traits and comedic techniques that span multiple frames and contexts, revealing how these patterns influence audience perceptions of femininity. The study situates these frames within three …

The Effects Of An Undergraduate Peer Mentoring Program On Belonging And Success, Alexa Darracq

Theses and Dissertations

The purpose of this study was to determine if participation in an undergraduate peer mentoring program led to increased feelings of belonging and success compared to students who have never received BYU ComD peer mentoring. Outcomes were measured using pre- and post-experiment surveys and focus groups. This study had ten participants in the experimental group and 12 participants in the control group with seven participants from the experimental group who participated in the focus groups. Analysis of the results determined there were three key findings from the study: mentees benefited from the peer mentoring program, students signed up to receive …

School Leadership Preparation Program Redesign: Purpose, Process, And Perspective, Rebecca L. Gerber

Theses and Dissertations

This paper reviews a collaborative effort between Brigham Young University's Educational Leadership and Foundations (EDLF) department and five school districts to redesign the School Leadership Preparation Program. The initiative aimed to bridge gaps between the practical needs of schools and the offerings of the university. A qualitative case study was conducted, focusing on three key groups: EDLF faculty, school district leaders involved in the redesign committee, and recent graduates of the updated program. Through detailed interviews, valuable insights were gathered into participants' experiences and perceptions concerning six major commitments of the newly designed program. This approach provided insights about the …

Saving Halloren: Driving International Business Success Through Proper Practices And Strategy, Paul J. Collins

Undergraduate Honors Theses

In an increasingly globalized world, navigating cultural differences is crucial to success in international business. This paper examines the application of cultural international business principles through a case study of Halloren Chocolate, Germany’s oldest chocolate factory. Using Erin Meyer’s Eight-Scale Tool for Mapping Cultural Differences, the study addresses the challenges that Darren Elhert, a Canadian businessman, faced while course-correcting the factory.

The paper analyzes how Halloren’s traditional, Eastern German culture hindered its ability to compete in the modern global marketplace. The case study focused on Elhert’s efforts to revive a stagnant company culture while preserving its national heritage. Through primary …

Predicted Inelastic Response Of Conventional And Ductile Steel Concentrically Braced Frame Buildings Under Wind Loads, Conrad Hamblin Belshe

Theses and Dissertations

The inelastic response of three-story steel concentrically braced frame buildings under wind loads was simulated to determine the applicability of ductile braced frame design to wind load applications. This study examined three types of steel concentrically braced frames: a conventional braced frame, a ductile braced frame, and a ductile braced frame with a reduced beam requirement. Braced frames were designed for four design wind speeds (220 mph, 156 mph, 127 mph, and 110 mph), for a total of nine unique braced frame designs. Nonlinear static pushover analysis was used to determine system overstrength and ductility under wind loads. Eigenvalue vibration …

Collection Of Instructional Slides From Molten Salt Electrochemistry Symposium (Moses), Devin Rappleye, Carlos Mejia

Faculty Publications

During the Molten Salt Electrochemistry Symposium (MoSES) on July 30-31, 2025, interactive instruction was given to the attendees including live demonstrations. These slides contain the introductory instructions given for each learning module at MoSES 2025. Please visit https://pyro.byu.edu/moses for more information.

Beyond The Pitch: Teaching Emotional Labor In Advertising Education Through An Action Research Program, Michael Joseph Mallory

Theses and Dissertations

As the advertising industry continues to expand, new graduates must navigate the profession in the face of increasing challenges. With competition in the job market growing and Generation Z valuing work-life balance, the advantage of quality advertising education becomes paramount. Current advertising education does not address the challenge of emotional labor that professionals will face in the field. With limited scholarship that explores emotional regulation, communication dynamics, and client relations in an academic advertising setting, emotional labor in advertising education is explored through a thoroughly documented experiential learning study. This study employs Participatory Action Research (PAR) to investigate, develop, and …

The Pressures Experienced By First-Generation Students With Afro-Diasporic Migrant Parents In The University Setting, Bryanna M. Larnyoh

Undergraduate Honors Theses

Guided by a life-reflectance perspective, this thesis investigates the academic and emotional experiences of BYU students with Afro-Diaporic immigrant parents, focusing on how they navigate familial expectations, cultural brokering, and identity formation.

The researcher conducted qualitative research in the form of interviewing five BYU students, born in the United States of America, with Afro-Diasporic migrant parents. By identifying positive and negative effects of their experiences on their socio-emotional health, the results identified commonalities and deviations in the students’ experiences that affect their overall BYU experience and cultural identity awareness.

Fabrication, Calibration, And Deployment Of A Home-Made Radiometer, Callum Flowerday, Ryan Thalman, Jaron Hansen

ScholarsArchive Data

Subfolders and Contents:

Chamber Characterization: Contains emission spectrum measured from inside the chamber with converted spectra to power and photon flux.

LED Calibration: (Each calibration file contains folders of data from each LED used in calibration)

• Cone
• Cone 2
• Dome 2
• Flat Top
• Quartz Rod
• Uniform Dome

Outside:

• Cone 2 front porch
• Cone 2 roof
• Flat top

Conflation Between Knowledge And Acceptance May Contribute To The Knowledge Gap Between Judeo-Christian And Non-Religious People, Jamie Jensen

ScholarsArchive Data

These data are from a nationwide study and a classroom intervention looking at participants' understanding of evolution (i.e., knowledge), and their acceptance of evolution.

Math Information Retrieval From Images Via Formula Extraction, Vector Embedding, And Multimodal Llm-Based Question Answering, Angel Wheelwright Crawford

Theses and Dissertations

Math Information Retrieval (MIR) aims to revolutionize the retrieval of math information by addressing the challenges in representing, retrieving, and producing highly specialized math content. In order to develop a robust MIR system, designers must be able to process math equations (MEs) to a format that different systems can use, which is difficult due to various formats math information are stored in, including visual images and document texts. To improve the usage of math information in varied forms for people who are learning and utilizing math, we propose three different methods of handling ME data. The first method is a …

Illness Severity And Marital Communication In Young Couples: The Moderating Role Of Marital Satisfaction, Jaime Lea Dick

Theses and Dissertations

The emergence of a chronic physical illness is unexpected in emerging adulthood and is accompanied by stress. Additionally, married partners of individuals with physical illnesses are likewise affected by the new diagnosis. Marriage outcomes of couples facing chronic illnesses together vary, being sometimes positive and sometimes negative. The current study examined the relationship between the emergence of chronic physical illness in emerging adults and marital communication of both the patient and partner, with marital satisfaction as a moderator. Gender differences are also addressed. From the Couple Relationships and Transition Experiences (CREATE) study, a nationally representative dataset of newly married emerging …