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Characterizing And Modeling The Nonlinear Behavior Of Additively Manufactured Trapped-Powder Dampers, Jonathan Knight Black
Characterizing And Modeling The Nonlinear Behavior Of Additively Manufactured Trapped-Powder Dampers, Jonathan Knight Black
Theses and Dissertations
Laser Powder Bed Fusion (LPBF) can be used to create metal parts with pockets of retained, unfused powder that serve as mechanical dampers. These trapped-powder dampers show promise for reducing the amplitude of vibrations at resonance by orders of magnitude. However, little is currently understood about the nonlinearity and repeatability of trapped-powder dampers, meaning that the design process currently consists of expensive trial-and-error prototyping and iteration. The present work contributes a corpus of experimental measurements for rectangular beams with trapped-powder dampers of various dimensions and locations. Preliminary testing revealed the presence of a memory effect which we hypothesize to be …
Investigating Radiation Induced Rowhammer And Retention Failures In Dram, Tyler Ricks
Investigating Radiation Induced Rowhammer And Retention Failures In Dram, Tyler Ricks
Theses and Dissertations
It is desirable for DRAM devices to be used in harsh radiation environments. Exposure to radiation causes DRAM cells to lose their retention time as their ability to store charge effectively declines. Exposure also worsens the effect of disturbance that causes neighboring cells to flip when a row is opened multiple times: an effect known as the Row Hammer Effect. This thesis evaluates the impact of radiation-induced memory cell degradation by comparing memory cell's retention time and their resilience to the row hammer vulnerability. Three generations of DRAM were placed under a neutron radiation beam. Sections of the irradiated devices …
Remote Running Gait Analysis Using Smartphone Video And Monocular Pose Estimation: A Feasibility Study, Luke Vankeersbilck
Remote Running Gait Analysis Using Smartphone Video And Monocular Pose Estimation: A Feasibility Study, Luke Vankeersbilck
Theses and Dissertations
Introduction: Running is a common form of exercise that comes with many health benefits; however, many people stop exercising because of the high injury risk. Running injury is connected with biomechanical risk factors. Yet, these risk factors often show inconsistent and conflicting results across studies, largely due to small sample sizes limiting statistical power. Low subject numbers may be partly due to the time requirements of traditional motion capture. Monocular pose estimation offers a promising alternative by using machine learning to track body landmarks from a single camera. This study evaluated the feasibility of remotely collecting running biomechanics data using …
Ai-Enabled Innovations In Automated Essay Scoring And Feedback Systems, Michael J. Murff
Ai-Enabled Innovations In Automated Essay Scoring And Feedback Systems, Michael J. Murff
Theses and Dissertations
This dissertation examines the evolution and educational implementation of Automated Essay Scoring (AES) systems, with particular focus on generative artificial intelligence integration in educational assessment. Through a two-article format, this research addresses the persistent gap between technical capability and educational adoption that has characterized AES development over seven decades. The first article presents a comprehensive methodological review analyzing 122 studies spanning AES evolution from foundational computational linguistics through contemporary hybrid systems. Despite achieving strong correlations with human scoring, modern AES systems face resistance due to validity concerns and misalignment with pedagogical values, revealing an "adoption paradox" where technical sophistication often …
Under The Sea And Into The Future With Darwin, Verne, & Wells: Evolutionary Ideas In Early Science Fiction Literature And Atomic Age Adaptations, Suzette K. Forston
Under The Sea And Into The Future With Darwin, Verne, & Wells: Evolutionary Ideas In Early Science Fiction Literature And Atomic Age Adaptations, Suzette K. Forston
Theses and Dissertations
In the latter half of the nineteenth century, Charles Darwin's theories challenged traditional ways of thinking about the world so dramatically that his writings inspired the formation of a new genre: science fiction. Two pioneering authors, Jules Verne and H. G. Wells drew from Darwin's writings in their classic novels, 20,000 Leagues Under the Seas (1870) and The Time Machine (1895). Though the two authors are often compared because they were both early science fiction authors, they approached Darwinian theory in different ways. Verne uses a more extrapolative approach and focusing on specific details of Darwin's texts to tell a …
First-Year Writing Student Perceptions Of Graduate Student Instructor Authority, Lacey Madison Hamilton
First-Year Writing Student Perceptions Of Graduate Student Instructor Authority, Lacey Madison Hamilton
Theses and Dissertations
Graduate student instructors (GSIs) are trusted to teach first-year writing (FYW) courses across U.S. campuses, yet many still wonder how their undergraduate students actually perceive their authority, especially when they're new to teaching or sharing a classroom with full-time faculty. While previous research has explored how GSIs view their own authority and how institutional structures shape their roles, we know far less about what students of these GSIs think. This study aims to fill that gap. Building on Reed and Ostenson's work in Big Comp, I conducted a mixed-methods study in Fall 2024 to hear directly from FYW students about …
Circadian Influences On Glycemic Control In 24-Hr Fasts Initiated At Different Mealtimes, Elizabeth Z. Gipson
Circadian Influences On Glycemic Control In 24-Hr Fasts Initiated At Different Mealtimes, Elizabeth Z. Gipson
Theses and Dissertations
This study investigated whether the timing of a 24-hour fast influences indicators of glycemic control throughout the duration of the fast or upon refeeding. Twenty-four adults who have overweight or obesity (13 female, 11 male) completed this randomized crossover study involving three 24-hour fasts initiated at either 8:00 am, 1:00 pm, or 6:00 pm followed by a 75 g oral glucose tolerance test (OGTT) which lasted 2 hours. Continuous glucose monitors (CGMs) were employed to track interstitial glucose throughout each fast and OGTT. Plasma samples for insulin, glucagon, glucagon-like peptide-1 (GLP-1), and glucose-dependent insulinotropic polypeptide (GIP) were collected at the …
Compact Heterogeneous Architectures And Algorithmic Methods For Enhanced Real-Time Digital True Time Delay Beamforming And Radar Applications, Nathan Lynn Burnett
Compact Heterogeneous Architectures And Algorithmic Methods For Enhanced Real-Time Digital True Time Delay Beamforming And Radar Applications, Nathan Lynn Burnett
Theses and Dissertations
Modern radar and signal processing systems require efficient computational architectures to handle increasing data rates while still being able to maintain dynamic configurability and complex tasks. This thesis presents and explores hardware and algorithmic approaches addressing these demands across several different applications. First, a low-cost tracking platform and architecture for unmanned aerial vehicles (UAVs) is developed, which provides detection and tracking capabilities, compliant with new FAA remote ID regulations. Second, a GPU-FPGA based digital true time delay beamformer is implemented to achieve real-time wideband radio frequency interference (RFI) mitigation. Specifically this beamformer explores weight calculation and calibration through particle swarm …
Is Social Media Use A Reason For Socially Withdrawn Individuals' Mental Health Difficulties?, Angela Grundvig
Is Social Media Use A Reason For Socially Withdrawn Individuals' Mental Health Difficulties?, Angela Grundvig
Theses and Dissertations
Studies have found a link between subtypes of social withdrawal and internalizing problems throughout most of the lifespan. However, the work conducted in adolescence is much more limited including a lack of work examining factors that might mediate the association between forms of social withdrawal and internalizing problems. Social comparison may be one way in which social withdrawal predicts internalizing problems. There has been research showing that social media usage is associated with internalizing problems. The purpose of this study was to assess (a) the associations between three subtypes of social withdrawal (shyness, avoidance, and unsociability), respectively, and indices of …
A Novel High-Order Absorbing Boundary Condition For Elastic Multiple Scattering Problems, Jordan Gregory Sheppard
A Novel High-Order Absorbing Boundary Condition For Elastic Multiple Scattering Problems, Jordan Gregory Sheppard
Theses and Dissertations
Elastic waves are waves that propagate by causing deformations in an elastic medium such as metal, rock, or rubber. The main characteristic of elastic wave motion is the coexistence of multiple types of waves at once in the medium, including compressional and shear wave components. This type of motion can be used to study the impacts of physical phenomena such as earthquakes. In this paper, we discuss our research on the time-harmonic scattering of elastic waves in a medium by multiple circular cylindrical obstacles that the wave cannot penetrate. Using the Helmholtz decomposition, we break down the vector-valued physical system …
Versatile Waveform Generation And Clocking Techniques For Rfsoc-Based Digital Designs, Michael David Jones
Versatile Waveform Generation And Clocking Techniques For Rfsoc-Based Digital Designs, Michael David Jones
Theses and Dissertations
Within an ever-evolving radio-frequency (RF) environment, designers are required to adapt systems to increasingly constricted parameters. The available tools continually grow to match this need, but so does the complexity in using them. The radio-frequency system-on-chip (RFSoC) is an innovation that combines a field-programmable gate array (FPGA) with an integrated RF chain. Designing with an RFSoC allows for high-precision data transmission, sampling, and processing, but it can be difficult and time-consuming to develop specialized circuits. The open-source CASPER project aims to provide a library of abstracted block-design components to simplify the design process. An arbitrary waveform generator (AWG) is created …
Routine Outcome Monitoring With The Youth Outcome Questionnaire-30.2 Self-Report: Creating And Testing An Empirical Alert System And Exploring Informant Discrepancy Patterns, Tate M. Paxton
Theses and Dissertations
Objective: Youth self-report data using the YOQ-30 has not been specifically examined for use in routine outcome monitoring systems. This study used the YOQ-30 self-report in three endeavors: (1) modeling change trajectories in a large, naturalistic outpatient sample, (2) creating and testing an empirical alert system for deterioration, and (3) exploring the role of informant agreement, both descriptively and in a change trajectory model. Method: The sample consisted of 21,098 adolescents ages 12-17 receiving outpatient mental health care who used the OQ Measures system. Multilevel individual change trajectory models estimated symptom change over time. An alert system was developed on …
Topological Homotopy Groups, Tyler Evans
Topological Homotopy Groups, Tyler Evans
Theses and Dissertations
In general, the homotopy groups of topological spaces fail to be topological groups when endowed with the quotient topology. In this thesis, we show that for Peano continua with Abelian fundamental group, the fundamental group endowed with the quotient topology is indeed a topological group. However, this result does not extend to higher homotopy groups; that is, there exists a Peano continuum whose nth homotopy group, endowed with the quotient topology, is not a topological group. Additionally, a new characterization of the quotient topology in terms of a limit operator is introduced.
Attachment Or Aversion: A Study Of The Effects Of Parental Technoference On Child Emotion Knowledge, Brooklyn Coleman
Attachment Or Aversion: A Study Of The Effects Of Parental Technoference On Child Emotion Knowledge, Brooklyn Coleman
Theses and Dissertations
Young children's understanding of emotions is heavily socialized by their parents. Through interactions with parents, children learn what emotions look like, when they are expressed, and how they are labeled (Laible, 2004a). Interruptions to interactions between children and parents have the potential to influence the development of children's emotion knowledge. According to the DREAMER framework, how one family member uses media and technology can influence other family members (Barr et al., 2024). Technoference (i.e., digital distraction while with others) is one example of how media might interrupt family life and influence child development as a whole. The current study examined …
Comparing The Effectiveness Of Online Training With Behavioral Consultation: The Impact Of Teacher Buy-In And Efficacy, Allison C. Lindsey
Comparing The Effectiveness Of Online Training With Behavioral Consultation: The Impact Of Teacher Buy-In And Efficacy, Allison C. Lindsey
Theses and Dissertations
This study investigated the comparative effectiveness of two different behavioral training methodologies, online training and behavioral consultation, in supporting teacher implementation of evidence-based practices, with a focus on the roles of teacher buy-in and self-efficacy. Challenging behavior is on the rise and teacher's need to know how to apply behavior management strategies to their classroom in order for their students to be most successful. Many teachers do not begin their careers with proper behavior management knowledge, training experience, or do not feel a sense of efficacy in implementing behavior management. Lack of knowledge and training may lead to decreased teacher …
Refugee Families: Parental Traumatic Stress And Child Outcomes A Scoping Review, Britta Sedig
Refugee Families: Parental Traumatic Stress And Child Outcomes A Scoping Review, Britta Sedig
Theses and Dissertations
This scoping review synthesizes recent literature (2019-2024) to explore mechanisms linking parental trauma to child mental health outcomes within refugee families. Guided by a systemic and relational focus, 20 studies were identified and analyzed, revealing five central themes: intergenerational transmission of trauma, parenting practices as mediators, parent-child dyadic attachment, family functioning and conflict, and post-migration and acculturative stress. Findings highlighted associations between parental trauma-related symptoms and refugee children's emotional and behavioral concerns. Parenting practices were frequently linked to child wellbeing, with some studies identifying risk factors like harsh discipline and emotional unavailability, and others noting protective roles of intentional caregiving. …
Development Of Numerical Tools And Performance Metrics For Analysis Of Optical Particle Counters, Doug Webb
Development Of Numerical Tools And Performance Metrics For Analysis Of Optical Particle Counters, Doug Webb
Theses and Dissertations
Monitoring air quality is essential for understanding and mitigating the health impacts of airborne particulate matter (PM), which is linked to respiratory and cardiovascular disease. Optical particle counters (OPCs) are widely used for air quality monitoring, yet their precision and accuracy remain uncertain due to inconsistent performance evaluations. In this thesis, performance metrics are developed that can be used to assess the accuracy of OPCs in measuring PM concentrations and size distributions. Computational fluid dynamics (CFD) simulations are employed to analyze the behavior of particle-laden air streams through representative OPC models. The impact of design parameters is quantified using newly …
Tracing Tremor: From Upper-Limb Neuromusculoskeletal Dynamics To Movement Signatures In Essential Tremor, Landon J. Beutler
Tracing Tremor: From Upper-Limb Neuromusculoskeletal Dynamics To Movement Signatures In Essential Tremor, Landon J. Beutler
Theses and Dissertations
Tremor is a common neurological condition that significantly impairs the quality of life for millions. Despite this prevalence, the underlying mechanisms of its propagation remain poorly understood, and current treatment options often rely on trial-and-error methods. Moreover, the most common type, Essential Tremor (ET), presents a unique challenge due to its heterogeneity--patients exhibit a wide range of symptoms, severities, and responses to treatment. This thesis primarily advances tremor understanding through computational modeling, with a secondary focus on data-driven subtyping of ET via cluster analysis. These parallel paths aim to improve both mechanistic insight and clinical classification. Tremor propagation refers to …
Development Of Low-Cost Small-Batch Flibe Filtration, And A Comparison Of Uranium Tetrafluoride And Ionic Oxygen Oxidation In Flibe, Jacob D. Christensen
Development Of Low-Cost Small-Batch Flibe Filtration, And A Comparison Of Uranium Tetrafluoride And Ionic Oxygen Oxidation In Flibe, Jacob D. Christensen
Theses and Dissertations
Low-cost benchtop-scale molten fluoride salt cleaning was investigated in FLiBe (LiF-BeF2), focusing on electrochemical cleaning and filtration. FLiBe filtration was demonstrated using both pressurized and open filtration systems. Copper and 400 Monel meshes were effective and reusable. Wetting appears to be the primary obstacle to FLiBe filtration. Oxygen oxidation behavior in FLiBe was examined using cyclic voltammetry (CV) and cyclic square wave voltammetry (CSWV) techniques. Standard addition height measurement was used to determine electrode surface area. Results support a single-step 2-electron process, matching observations in literature. Pt electrodes may be prone to oxidative side reactions, although more investigation is required. …
When Quitting Isn't An Option: Learner Perceptions Of Persistence Factors In A Faith-Based Online Global English As An International Language Course, Heather Porter Ugege
When Quitting Isn't An Option: Learner Perceptions Of Persistence Factors In A Faith-Based Online Global English As An International Language Course, Heather Porter Ugege
Theses and Dissertations
This paper explores the perceptions of learners in an online, global, faith-based, English as an international language (EIL) course. The course is designed to help students with limited access to educational opportunities develop English skills and prepare for enrollment in an online university. Since its launch, course enrollment, retention, engagement, and completion metrics have shown significant gains year over year. However, the number of learners in the course who have met all course completion criteria is still limited. This inquiry aims to gain a deeper understanding of the factors influencing learner persistence from the perspectives of both course completers and …
Perceptions Of Trauma-Informed Care Training For Teachers In Early Childhood Education Settings, Molly Michelle Michaels
Perceptions Of Trauma-Informed Care Training For Teachers In Early Childhood Education Settings, Molly Michelle Michaels
Theses and Dissertations
The maltreatment of children is currently a global health priority (Chamberlain et al., 2019). By the age of 16, over two-thirds of children report having experienced at least one traumatic event (Toof et al., 2020). Exposure to childhood trauma can negatively impact brain development, leading to problems functioning across community, home, and school settings (Burke Harris, 2018). In response, the Substance Abuse and Mental Health Services Administration developed a framework for trauma-informed care to address the significant impact of trauma on individuals (Loomis, 2018). However, few studies exist that explore the use of trauma-informed care practices in early childhood education …
Seasonal Variation In Modulus Of Cement-Treated Base Layers And Untreated Base Layers In Utah, Mason Robert Kessler Millard
Seasonal Variation In Modulus Of Cement-Treated Base Layers And Untreated Base Layers In Utah, Mason Robert Kessler Millard
Theses and Dissertations
The objective of this research was to compare the stiffness of cement-treated base (CTB) layers and untreated base course (UTBC) layers in a cold region through a typical year. The scope of work included testing of three residential pavement segments comprising CTB layers and two comparable pavement segments comprising UTBC layers in northern Utah. Design thicknesses were verified through drilling and dynamic cone penetrometer testing in September 2024. Following 3 to 15 years of service, the sites were evaluated using portable falling-weight deflectometer (PFWD) testing in May 2024, July 2024, September 2024, November 2024, January 2025, and March 2025. After …
Extracting Magnetic Exchange Interactions From Magnetic Pair Distribution Function Data Via Monte Carlo Simulations, Emma Zappala
Extracting Magnetic Exchange Interactions From Magnetic Pair Distribution Function Data Via Monte Carlo Simulations, Emma Zappala
Theses and Dissertations
The magnetic pair distribution function (mPDF) is a powerful tool used to analyze diffuse magnetic scattering data in real-space. Presently, mPDF is usually used to model real-space spin configurations of materials, offering important insights into the local magnetic structure, but not to directly probe the magnetic interactions giving rise to the magnetic structure in the first place. Using Monte Carlo simulations, a robust algorithm to simulate the magnetic structure of materials, we can connect the underlying magnetic exchange parameters to the spin configurations from experimental mPDF data. We prove this concept using a simple two-dimensional Ising model and then demonstrate …
Transcendental Formulas For The Coefficients Of Ramanujan's Mock Theta Functions, Gradin Anderson
Transcendental Formulas For The Coefficients Of Ramanujan's Mock Theta Functions, Gradin Anderson
Theses and Dissertations
Ramanujan's 1920 last letter to Hardy contains seventeen examples of mock theta functions, including the famous third order function f(q), which resemble modular forms of weight 1/2. This list has since been expanded by individuals such as Gordon and McIntosh and the McKay--Thompson series arising in moonshine theory. In 1964, Andrews---improving on a result of Dragonette---gave an asymptotic formula for the coefficients of f(q) and conjectured an exact formula: a conditionally convergent series that closely resembles the Hardy--Ramanujan--Rademacher formula for the partition function. A key breakthrough came in 2001, when Zwegers wrote f(q) as the holomorphic component of a vector-valued …
Rotor Interaction Aerodynamics: Influence Of Phase And Spacing On Wake And Pressure Behavior, Nathan D. Welker
Rotor Interaction Aerodynamics: Influence Of Phase And Spacing On Wake And Pressure Behavior, Nathan D. Welker
Theses and Dissertations
This dissertation explores the aerodynamic behavior and interactions in the flow-fields of dual rotor systems. The experiments used Particle Image Velocimetry (PIV) combined with pressure and force measurements to characterize the flow with an emphasis on side-by-side rotor flows at small separation distances. This work is separated into six main chapters: first, the topic is introduced with a thorough literature review in Chapter 1, the methodology and details of the experiments are discussed in detail in Chapter 2; the effects of phase offset on dual-rotor rotor flows is explored in Chapter 3; the influence of separation distance on the side-by-side …
Recreation Effects On Soil Carbon, Biocrust Presence, Soil Stability, And Invasive Species In Indian Creek, Bears Ears National Monument, Elisabeth M. Currit
Recreation Effects On Soil Carbon, Biocrust Presence, Soil Stability, And Invasive Species In Indian Creek, Bears Ears National Monument, Elisabeth M. Currit
Theses and Dissertations
Desert ecosystems perform essential ecosystem services, including playing a crucial role in the global carbon cycle. Because of this, it is important to understand how recreational activities, common in desert environments, impacts dryland ecosystems' ability to perform ecosystem services. The growing popularity of outdoor recreation in Western US poses a threat to desert ecosystems, and unregulated activities can harm soil health, particularly the presence and functioning of biological soil crusts (biocrusts). This study uses the Indian Creek Special Recreation Management area in Bears Ears National Monument, Utah, USA, as a case study for recreation impacted desert ecosystems. It examines the …
Consequences Of The Double Empathy Problem Within The Clinical Environment: A New Model For Neuroinclusive Care, Sofia Jimenez
Consequences Of The Double Empathy Problem Within The Clinical Environment: A New Model For Neuroinclusive Care, Sofia Jimenez
Theses and Dissertations
As diagnoses of autism spectrum disorder (ASD) rise, the neurodiversity and autistic self-advocacy movements have challenged traditional deficit-based clinical models and called for more inclusive, affirming approaches to care. Recent research disputes the long-held belief that autistic individuals have deficits in perspective-taking, revealing that miscommunication between autistic and neurotypical individuals results from mutual misunderstanding, a concept known as the double empathy problem (DEP; Milton, 2012), with the triple empathy problem (TEP) extending this framework to healthcare settings. Our study investigates the consequences of the DEP and TEP within clinical environments, focusing on interactions between neurotypical speech-language pathologists (SLPs) and adult …
Coding For Nonstandard Channels: A Capacity-Oriented Approach, J Daniel Harman
Coding For Nonstandard Channels: A Capacity-Oriented Approach, J Daniel Harman
Theses and Dissertations
This work addresses the issue of coding for non-standard channel models with an emphasis on capacity-oriented channel analysis and system design. The first channel studied is the Wyner wiretap channel. Channel sounding results were obtained to calculate the capacity for the multi-antenna case of the Wyner wiretap channel to ascertain the potential for secure communication via secrecy coding. The second channel studied is an asymmetric binary crossover erasure channel (ABCEC) with a short-blocklength constraint. The capacity for this channel was derived, and linear codes were chosen and tested. Another study was conducted on the ABCEC within a degraded wiretap channel …
Exploring Soil-Derived Antimicrobials For Inhibiting Dairy-Associated Pathogens And Spoilage Bacteria, Michael Joseph Moran
Exploring Soil-Derived Antimicrobials For Inhibiting Dairy-Associated Pathogens And Spoilage Bacteria, Michael Joseph Moran
Theses and Dissertations
Spore-forming bacteria are among the most problematic contaminants in fluid milk. They can survive pasteurization, grow at refrigeration temperatures, and secrete heat-stable enzymes, making them a major cause of spoilage in both pasteurized and reconstituted milk products. Current nonthermal strategies for reducing spore counts, including microfiltration and bactofugation, are often costly and inconsistent. The increasing consumer demand for natural additives in food products has sparked interest in the use of bacterially-derived antimicrobial compounds, particularly those from generally recognized as safe (GRAS) organisms, as an alternative method of dairy preservation. This study explores the antimicrobial potential of ten soil-derived Bacillus and …
Perspectives On Career Advising At A Large Private Religious Institution, Lane Toshio Muranaka
Perspectives On Career Advising At A Large Private Religious Institution, Lane Toshio Muranaka
Theses and Dissertations
This study examines the role of career advising at Brigham Young University (BYU), a faith-based institution where professional guidance focuses on spiritual development and purpose-driven learning. Through qualitative interviews with career advisors across various disciplines, the research explores how advisors define student success, integrate faith into their advising practices, and support students in aligning their career aspirations with personal meaning and the university's religious mission. Grounded in the belief that holistic education fosters lifelong success, BYU emphasizes the development of the "total person," including moral and spiritual dimensions. Findings reveal that student success is not solely measured by employment outcomes …