Digital Commons Network^™

Greg Snow Research Interests, Greg Snow

BYU Research Development Office Research Networking Conference

Areas of Interest: Statistical support for any University Research

Automated Classification Of Extended Astrophysical Objects Using Ai Techniques, Aleksandr Mosenkov

BYU Research Development Office Research Networking Conference

Areas of Interest: Extragalactic astronomy, AI methods, Computer Science

Religious Liberty: Natural Rights Or The Politics Of Conscience, Madeline Nielsen

Undergraduate Honors Theses

Religion Clause jurisprudence in the United States has long been a subject of debate. Vincent Phillip Muñoz and Steven D. Smith, two prominent scholars in the field, offer distinct perspectives on the interpretation and application of the Religion Clauses. Muñoz advocates for a natural rights construction, grounding religious liberty in the Founders' understanding of inalienable rights. In contrast, Smith analyzes the principle of religious liberty through reflecting upon how the Founders’, particularly James Madison, were influenced by the historical, philosophical, and theological development of the principle. This thesis conducts a comparative analysis of their viewpoints, focusing on their interpretations of …

3d Printed Mounts For Liquid Microdroplet Resonators, Parker A. Awerkamp

Theses and Dissertations

Liquid microdroplet resonators provide an excellent tool for optical studies due to their innate smoothness and high quality factors, but they can be difficult to control. By using 3D printed mounts to support the droplets, we can obtain precise control over the droplet geometries and positions. We here present our work with oil, water, and ice microdroplets, as well as tools required to enable their study. We first present methods for creating 3D printed mounts for oil microdroplet resonators. The mounts enable precise positioning of the droplets relative to a tapered optical fiber. The oil microdroplet resonators exhibited quality factors …

Eugenics And Feminism: The Reflections Of Two Ideologies In The Reproductive Policies Of The Nazi Regime, The Reunification Period, And Present-Day Germany, Sydney Reil

Undergraduate Honors Theses

German abortion law is restrictive for a Western European nation of strong economic standing and with relatively liberal social policy. Additionally, Germany is one of few Western European nations without an embryopathy indication, which allows for exceptional abortions in cases of fetal defects. The law (as it stands in 2024), has been immeasurably shaped by two ideologies, eugenics and feminism, and by modern Germany’s consideration of both the ideologies themselves, and of how they influenced the reproductive policies of the twentieth century. The purpose of this study is to demonstrate the influences of eugenics and feminism on German reproductive law …

Striking At The Root: A Categorization Of Dns Clients, Tyler Dean

Theses and Dissertations

The Domain Name System (DNS) root servers have provided a useful look into the DNS and internet ecosystems for decades. We present a categorization of clients querying DNS root servers. Using two clustering algorithms on DNS traffic sampled in 2020, we can predict the structure and volume of queries originating from different types of clients. Previous research has used unsupervised techniques to better understand DNS traffic patterns, but none have, to our knowledge, considered clients beyond those driven by queries from end users. By performing clustering on IP addresses rather than on individual queries, we are able to examine the …

Psychotherapy Utilization And Outcomes Of Military Veteran-College Students And Student-Rotc Members Compared To Similar Nonmilitary College Students, Jacob Michael Christian Goetz

Theses and Dissertations

This study examines current trends of university counseling center (UCC) utilization among Reserve Officer Training Corps (ROTC) students and student-military Veterans, compared to their nonmilitary-minded peers at a large, private, western university. Given likely differences in the lived experiences between these three populations, research is needed to provide insight on the treatment needs of military-minded students. We examine counseling center data for ROTC (n = 88), Veteran (n = 93), and nonmilitary-minded (n = 16,268) students who presented for counseling services from 2014-2021. A matched sample was obtained from the dataset for some of the analyses. The three groups are …

Adding A Teacher Dashboard To A Functioning Web App, Melanie Jensen

Instructional Psychology and Technology Graduate Student Projects

A teacher dashboard was added to an existing web-based application that teaches math-fact fluency. The author describes the process of analysis, design, development, and implementation. Challenges faced at each stage are described, and design decisions are discussed.

An Overview Of Contributing Frameworks To Culturally Sustaining Pedagogy, Sarai Clemente Soli

Theses and Dissertations

Culturally Sustaining Pedagogy (CSP) is a framework designed to help traditionally marginalized students. Other frameworks have previously tried to draw on culture to help students in similar ways. However, Paris (2012b) claimed that the word sustaining enclosed a meaning of maintaining and enhancing these students' language and cultural practices that no other frameworks did until that point. There is some confusion for educators and others about CSP since it is a newer framework and that there are many of these cultural frameworks analyzing similar concepts. Therefore, the purpose of this literature review was to examine these previous main frameworks that …

Documentation Of Norm Negotiation In A Secondary Mathematics Classroom, Michelle R. Bagley

Theses and Dissertations

While previous mathematics education research has shown that norms can change in mathematics classrooms, little research has closely documented the struggles, concessions, and compromises involved in the negotiation process. Negotiating norms is a complex process entailing deliberate teacher moves intended to promote norms, often met with misunderstandings or resistance from students. This thesis documented the negotiation process that occurred when a teacher attempted to require conceptual explanations from students who had not previously been accustomed to doing so. I recorded six days of instruction in a 9th grade algebra unit, transcribed the class discussions, and inferred norms "at play" for …

Exploring The Effects Of Delayed Auditory Feedback On Speech Kinematics: A Comparative Analysis Of Monologue Speech And Tongue Twisters, Abbey Corinne Persons

Theses and Dissertations

This study investigated the effects of delayed auditory feedback (DAF) on speech kinematics during tongue twisters and monologues. Participants were 20 adults (10 men, 10 women) aged 18-29 with typical speech and hearing abilities. A smartphone app provided DAF latencies of 50 ms, 100 ms, and 150 ms. Kinematic measures were made of peak speed, stroke distance, and hull area for the tongue front, jaw, and lower lip under typical and the three DAF conditions. Results indicated that DAF significantly reduced peak speed and stroke distance for all articulators during tongue twisters (p < .01), with the effect magnitude increasing with longer delays. No significant DAF effects were observed in monologues (p > .05). Sex differences were noted, with women …

Strong Gelfand Pairs Of Some Finite Groups, Joseph E. Marrow

Theses and Dissertations

Strong Gelfand pairs describe a relation between a group and a subgroup, using a relation between inner products of their characters. We find all strong Gelfand pairs of the dihedral and dicyclic groups, and several of the sporadic groups. We provide some results for the strong Gelfand pairs of the affine linear groups, in addition to the exceptional classical groups $\mathrm{Sp}_4(q)$ for $q$ a power of $2$.

An Information Geometric Analysis Of A Shallow-Water Waveguide Using Vgs Parametrization, Michelle Wang

Undergraduate Honors Theses

In geoacoustic inversion, selecting an appropriate seabed parametrization, especially with an unknown number of sediment layers, is a challenge that is compounded by potential bias when establishing bounds in the parameter search space. One approach to addressing these issues is rooted in the techniques of Information geometry. Information geometry informs model selection and parameterization by quantifying which model parameters are informed by observational data. This paper provides an information geometric analysis of a shallow-water waveguide, where the acoustic properties of the lower half-space are derived from the viscous grain-shearing (VGS) model.

Specifically, we consider single-frequency transmission loss (TL) across a …

Membrane Hinges For Deployable Systems, C. Mitchel Skinner

Theses and Dissertations

Origami-inspired and deployable technology has become increasingly common in a variety of applications including satellite and antenna designs for space applications. The drive to utilize ultra-thin materials in the design of these deployable space structures has led to the development of membrane hinges. Membrane hinges show promise as an effective surrogate fold because of their potential advantages including requiring minimal volume and mass, allowing for small bending radii, and functioning without lubricant. Two challenges associated with membrane hinges include reliability after repeated cyclic loading and predictability of a large deployable with radially-unconstrained membrane hinges. The research presented includes the cyclic …

Characterizing And Manipulating Intra-Die Performance Variation Of Fpgas And Its Application In Security, Hayden C. Cook

Theses and Dissertations

Field Programmable Gate Arrays (FPGAs) are reconfigurable, high-performing devices that are often used in critical applications. However, like all semiconductors, FPGAs experience transistor aging that can lower performance and lead to device failures. Additionally, device aging also has several security implications. Therefore, understanding the aging mechanisms behind transistor aging is necessary to ensure the reliability of FPGAs. However, current aging studies either rely on simulation alone or are unable to isolate aging effects on specific elements within the FPGA. This dissertation uses the reconfigurability of FPGAs to develop novel aging techniques that allow for the targeted aging of specific areas …

Facets Of Neuroticism As Predictors Of Heart Rate Variability And Psychological Distress, Mikel Cressman

Theses and Dissertations

Heart rate variability (HRV) and personality are related to both physical and mental health outcomes. Previous research has found a relationship between neuroticism and distress while the findings on the relationship between neuroticism and HRV are mixed. Studying the facets of neuroticism may provide a more nuanced view of the effects of personality on HRV and distress. Previous research has suggested that the vulnerability facet of neuroticism appears to be uniquely related to the cardiovascular response to stress. This study's first hypothesis is that individuals with higher scores on the vulnerability facet will have lower heart rate variability. The second …

Library Internal Reviews For Value Description And Strategic Planning, Holt Zaugg

Faculty Publications

In between university level assessments, the BYU Library conducts internal reviews of each library department, describing its value to the library and university, and providing recommendations for improvement. The process used a team of library employees in departments not under review and an external reviewer to conduct the internal review. Using a case-study approach, the development of an internal review system, its meta-evaluation at the end of its first cycle, and the on-going efforts to improve the internal review process are described. Using a graduate level evaluation class followed by a task force, changes were made to the internal review …

Rigorous Verification Of Stability Of Ideal Gas Layers, Damian Anderson

Theses and Dissertations

In this thesis we develop tools for carrying out computer assisted proof of the stability of traveling wave solutions of the spatially one-dimensional compressible Navier-Stokes equations with an ideal gas equation of state. In particular, we obtain rigorous, tight error bounds on a high-accuracy numerical approximation of the traveling wave profile for parameters corresponding to air, and we obtain rigorous representations in a neighborhood of positive and negative infinity of the solution to the first order ODE associated with linearizing the PDE equations about the traveling wave solution. We also develop supporting tools for rigorous verification of wave stability.

Unveiling Trends, Terminology, And Teaching Competencies Of Blended Courses In Higher Education, Jennifer Lynn Ramsey

Theses and Dissertations

This dissertation has been written in a three-article journal-ready format and centers on competencies for blended teaching in higher education. I use the PRISMA process and thematic coding to analyze 34 articles from 2002 to 2022, highlighting strategic combination, learner-centered approaches, and additional support. I also use the Google Search API and content analysis to suggest that blended, digital, and flexible may be post-secondary institutions' most frequently used terminology to describe contexts incorporating online and in-person components. I also gather qualitative data from interviews with faculty to highlight the context and nuances surrounding blended teaching competencies, including creative innovation, technology …

Derivative Propagation Through Vortex Particle Method Simulation, Eric Green, Andrew Ning

Faculty Publications

Automatic differentiation (AD) is a powerful tool for evaluating numerical derivatives. In particular, reverse-mode AD provides numerical gradients in a way that is insensitive to the number of input variables. This makes reverse-mode AD well-suited for solving large optimization problems. However, reverse-mode AD has a particularly large associated memory cost because most intermediate values in operations need to be cached. This is problematic for large problems such as aerodynamics simulations, though, since the memory requirements can quickly become impractical. The solution implemented in this work is to provide analytic pullback expressions for functions for which many of the intermediate values …

Trajectory Optimization Of Evtol And Conventional Aircraft: A Comparative Analysis Of Vortex Particle Method And Vortex Lattice + Blade Element Momentum Theory, Andrew Tagg, Ryan Anderson, Cibin Joseph, Andrew Ning

Faculty Publications

Trajectory optimization of aircraft transition maneuvers can significantly influence the design of these systems, particularly when making decisions about aircraft geometry, propulsion sizing, and control system design. This paper presents the trajectory optimization of air vehicles including electric vertical takeoff and landing (eVTOL) as well as conventional aircraft. The study evaluates the influence of fidelity in trajectory design by comparing the use of two aerodynamic methods in the context of trajectory optimization. The mid-fidelity method utilizes a vortex lattice method (VLM) to model lifting surfaces while employing blade element momentum theory (BEMT) to model rudimentary rotor-wing interactions. The high-fidelity approach …

Ductape: A Steady-State, Axisymmetric Ducted Fan Analysis Code Designed For Gradient-Based Optimization, Judd Mehr, Andrew Ning

Faculty Publications

Electric ducted fans have become an intriguing option for the propulsion systems of clean, quiet advanced air mobility technologies due to their potential benefits in both aerodynamic efficiency and reduced noise profiles compared to open rotor systems. Exploration of conceptual electric ducted fan design in the context of novel, and often complex, applications may be greatly aided by the use of optimization techniques. Specifically, gradient-based optimization lends itself to the exploration of large, complex, multi-disciplinary systems due to its inherent scalability. Despite ducted fans/propellers having been relatively well studied for the last century, modern, gradient-based, optimization-ready analysis tools for ducted …

Solving Unsteady Potential Flow Problems In O(N) Time, Ryan Anderson, Andrew Ning

Faculty Publications

Design of vertical takeoff and landing aircraft is challenging in part due to significant aerodynamic interactions between rotors and wings. Computational models can aid in their design, but are computationally expensive. 3-D panel methods coupled with vortex particle wakes offer an attractive solution, but solving for the panel strengths scales poorly for large problems. Multigrid methods, such as Krylov subspace methods in conjunction with the fast multipole method (FMM), have been demonstrated to reduce the scaling to O(𝑁). We explore the performance and limitations of the Krylov-FMM method, traditional matrix-powered GMRES, LU decomposition, and a novel O(𝑁) multigrid approach to …

Noise In The Library: Using Wearable Biomarker Devices To Measure Student Stress While Studying In The Library, Megan Frost

Faculty Publications

Many patrons come to the library seeking a quite environment, but some library spaces are noisy. In our study, we attempted to identify if the level of noise in a typical busy university library setting impacted the physiological stress of its patrons, as measured by wearable devices. We assessed participants’ heart rate variability (HRV) and skin temperature while they studied in different areas in the library. We found that there was no significant difference in patron stress levels while studying in loud vs quiet areas. This was even true for those patrons who came into the library hoping to be …

Cameras For Girls: Nonprofit Spotlight, Angie Holzer

Journal of Nonprofit Innovation

No abstract provided.

Full Issue: Artificial Intelligence And Data For Nonprofit Organizations, Angie Holzer

Journal of Nonprofit Innovation

No abstract provided.

Revolutionising Nonprofit Verification With Ai Powered Intelligence, J Unsdorfer

Journal of Nonprofit Innovation

In an era where stakeholders increasingly demand clarity and honesty, the importance of corporate transparency has reached unprecedented levels. Both businesses and nonprofits are now faced with the challenge of effectively demonstrating their integrity and trustworthiness. Artificial intelligence (AI) offers promising solutions to these challenges by enabling deeper insights into corporate relationships. Venturefy, an Israel-based company, is at the forefront of this movement, using AI to decode complex data sets and verify corporate connections. This article explores how AI works, Venturefy’s unique approach to transparency, and its significant partnership with WikiCharities to enhance transparency in the nonprofit sector.

Addressing Social Inequalities Using Ai, Big Data, And Machine Learning, Erica L. Jensen, Lakell Archer, Sumaya Ali

Journal of Nonprofit Innovation

No abstract provided.

Research Summaries: Artificial Intelligence And Data For Nonprofits, Erica Jensen

Journal of Nonprofit Innovation

No abstract provided.

Enhancing Nonprofit Efficiency And Productivity Through Ai: Applications Of Chatgpt, Sam R. Calhoun, Angie Holzer

Journal of Nonprofit Innovation

This article explores how nonprofit organizations can leverage AI to enhance efficiency and productivity. Key areas of impact include automating routine inquiries, supporting fundraising efforts, streamlining administrative tasks, aiding in program delivery, facilitating research and analysis, improving internal communication, and providing professional development. By integrating AI, nonprofits can optimize operations and focus more on their core mission, leading to greater social impact.