Digital Commons Network^™

A Laboratory Study On The Hydraulics Of Stepped Spillways: Effects Of Step Geometry And A Labyrinth Crest, Megh Raj K C

All Graduate Theses and Dissertations, Fall 2023 to Present

Observed trends in extreme storms are affecting the safety of several embankment dams. Spillways are critical for safely conveying excess water in the reservoir over the dam and into the downstream river, yet many dams that were built over 40 years ago have undersized spillways to handle modern flood estimates requiring repairs and upgrades. Consequently, a unique spillway crest, the labyrinth weir, has been used as a cost-effective improvement for numerous projects to enhance discharge capacity of existing weirs. Another cost-effective option for overtopping protection due is to place a less expensive concrete, Roller-Compacted Concrete (RCC), over the dam to …

Greater Sage-Grouse Habitat Dynamics And Grazing, A Study Of Vegetation Indices And Survival, Codi R. Backen

All Graduate Theses and Dissertations, Fall 2023 to Present

North American rangelands are vast, open landscapes that support diverse ecosystems and provide many ecosystem services. Many wildlife call sagebrush rangelands home, including the Greater sage-grouse (sage-grouse; Centrocercus urophasianus). Sage-grouse habitat encompasses 165 million acres across western North America, and this bird has been of conservation concern as their populations drastically declined since the 1960s. Rangelands are also grazed by livestock, which has the potential to negatively affect sagebrush ecosystems when overgrazed or overstocked, which could be detrimental to sage-grouse nesting habitat. Additionally, sagebrush rangelands undergo annual variations in precipitation, temperature, growing season length, and vegetation vigor, which has …

Advancing Multi-Agent Robotics Simulations Through Heterogeneous Reinforcement Learning In Isaaclab, Jacob R. Haight

All Graduate Theses and Dissertations, Fall 2023 to Present

Robots increasingly operate in collaborative teams across domains such as search-and- rescue, warehouse automation, and autonomous driving—scenarios that demand advanced coordination strategies enabled by multi-agent reinforcement learning (MARL). However, existing simulation frameworks often struggle to balance realism, speed, and scalability, especially when supporting diverse, heterogeneous robot teams. This research extends Isaac Lab, a high-performance robotics simulator, by integrating heterogeneous-agent reinforcement learning (HARL) capabilities. The result is a flexible and GPU-accelerated platform for training both homogeneous and heterogeneous robot teams in complex, physics-based environments. These enhancements significantly narrow the gap between simulation and real-world deployment for multi-robot systems.

The Impact Of Visually Presented Distractor Taboo Words During A Bilateral Attention Task, Chloe Taylor

All Graduate Theses and Dissertations, Fall 2023 to Present

Attention is a limited resource. Some events are able to capture one’s attention more efficiently than others, such as swear or sexual words. These events have preferential access to attentional resources and increase our arousal levels due to the activity of a neurotransmitter called norepinephrine. We investigate how well swear/sexual words capture peoples’ attention and interpret these effects in terms of norepinephrine activity.

Participants performed a visual task where they responded to different shapes presented while ignoring neutral or swear/sexual words presented on opposing sides of the computer screen.

Participants were significantly more inaccurate in identifying the shape present when …

Women’S Evolving Roles: Gender, Authority, And The History Of Latter-Day Saint Patriarchy, Zachary Brady

Undergraduate Honors Capstone Projects

This project aims to further understand contemporary women’s issues within the Church of Jesus Christ of Latter-day Saints by answering three questions. 1) What social and doctrinal factors have influenced the development of patriarchal structures within the LDS Church, and how have these factors evolved? 2) What are the current leadership and decision-making roles available to LDS women, and how does church membership feel about them? 3) What ideas exist for progress in gender equality and women’s leadership? This discussion provides relevant historical context, outlines current issues regarding LDS women’s authority challenges and theological interpretations, and numerous proposed solutions from …

On The Challenges Posed By Non-Machian Solutions To Relationalism In General Relativity, Zachary Matthew Zito

Undergraduate Honors Capstone Projects

The relationship between Mach’s Principle and solutions to Einstein’s field equations is examined, with special attention to Friedmann-Lematre-Robertson-Walker (FLRW) cosmology. Mach’s Principle is outlined, and the extent to which general relativity fulfills Machs vision is assessed. It is argued that several important solutions to Einsteins equations, particularly the FLRW cosmological models, embody key Machian features. In order to elucidate the FLRW cosmological model, the associated energy-momentum tensor for a perfect fluid under the assumptions of large-scale homogeneity and isotropy is derived and used to obtain the Friedmann equations that govern cosmic expansion. It is shown that FLRW cosmology can be …

Establishing Methods For In Vitro Static Culture Of Gut Microbiomes For Nutritional Intervention Studies, Jeremy Mathew Case

Undergraduate Honors Capstone Projects

Lipid oxidation products (LOPs), which form during high-heat processing of oils common in Western diets, are known to cause inflammation and cellular damage. While LOPs have been implicated in exacerbating colitis and promoting colon tumorigenesis in mouse models, their direct impact on the gut microbiome remains poorly understood. This capstone project aimed to develop a low-cost in vitro protocol to culture the mouse gut microbiome under anaerobic conditions, enabling future investigations into the direct effects of bioactive dietary compounds such as LOPs. The study also assessed whether viable microbial communities could be recovered from fecal samples stored at -80°C. Fecal …

Reevaluating The Drumian Carbon Isotope Excursion (Dice) In Western-Central Utah, Michelle M. Norman

Undergraduate Honors Capstone Projects

The Drumian Stage of the Cambrian Period is defined by the First Appearance Datum (FAD) of the cosmopolitan trilobite Ptychagnostus atavus in 504.5 Ma strata deposited on the slope and shelf of the Laurentia margin. The Drumian Global Stratotype Section and Point (GSSP), showing the best preserved example of P. atavus compared to global outcrops, is defined in the Drum Mountains of west-central Utah. Due to the inconsistent nature of fossil preservation, researchers have sought secondary proxies to identify Drumian-aged strata in the absence of age-diagnostic fauna. One key proxy is the Drumian Carbon Isotope Excursion (DICE), an ~-2.5‰ carbon …

Discovering The True Meaning Of Federalist No. 27, Mckenzie Pedersen-Campbell

Undergraduate Honors Capstone Projects

The Federalist Papers are widely known as they helped explain the Constitution and gather support for its ratification. However, what they mean is not always clear. This is problematic, especially when Supreme Court Justices look to the Federalist Papers to help them make decisions. A particularly fascinating example of this problem arose in the case Printz v. United States (1997). Both the majority and dissent argued that their interpretation was supported by Federalist No. 27. That leads to the question of what Federalist No. 27 actually means. By looking at the context surrounding Alexander Hamilton (the author) and previous Supreme …

Ghostlight: A Fargedy, Ethan Thomas Shaw

Undergraduate Honors Capstone Projects

Frequently, throughout art media, artists rarely venture from realism. With the stylistic tools and artistic innovations made over the last 150 years that venture past realism, it is time for artists everywhere to take the next big step and begin the ombre of style and genre within works, challenging society in new ways. The goal of this project is to research the function and effect of different genres and styles within theatre and find what is required to successfully communicate them both textually and within a production. This includes reading and researching plays, theatre history, and the influence/evolution of style …

State Legislature Demographics And Anti-Transgender Legislation, Sophie Christensen

Undergraduate Honors Capstone Projects

Starting in 2015, anti-transgender bills have been introduced in state legislatures in exponentially increasing numbers, with a sharp uptick in 2020 and numbers that nearly doubled every year since then. These bills concern a wide variety of issues, from sports participation for transgender adolescents to drag bans to restrictions on bathroom usage. This paper finds that only a small percentage of the bills are passed into law, indicating that passing laws is less important to legislators than introducing bills. Given these intentions, this paper seeks to analyze the demographic makeup of chambers that introduce and pass these bills to understand …

Training Lander For Rover Arm Testing, James Peck

Undergraduate Honors Capstone Projects

The purpose of this honors capstone project is to design and fabricate a training lander to support the Utah State University (USU) rover team in preparation for the University Rover Challenge (URC). The URC is an international collegiate competition featuring four missions, one of which—the Equipment Servicing Mission—demands a high level of robotic arm functionality and operator skill. Historically, USU's rover teams have struggled to qualify for the URC finals, in part due to limited hands-on training opportunities with the robotic arm.

To address this gap, the training lander replicates the tasks found in the URC Equipment Servicing Mission, such …

Death In A Small Town, Christine Cooper

Undergraduate Honors Capstone Projects

Today, those who experience the loss of a loved one are far removed from the process of nursing the dying and watching over the dead. These tasks are relegated to professionals with specific education, certifications, and licensing. With advances in medical technology and hospitals in most communities staffed with well-trained doctors and nurses, the process of dying is more prolonged than that of the late-19th and early-20th centuries in rural small towns. Additionally, with the rise of the death care industry family involvement is often limited to choosing a casket and organizing services. In some ways death has become an …

An Evaluation Of Using Linked Digital Activity Schedules To Teach Sociodramatic Play, Nicholas Lindgren

All Graduate Theses and Dissertations, Fall 2023 to Present

Individuals with ASD often have difficulties communicating with peers and navigating social interactions (APA, 2022). Building these skills may help these individuals interact with peers, siblings, and others in the community. One area where individuals with ASD may need support is engaging in play. Specifically, in engaging in sociodramatic play (i.e., pretend play that involves role-playing aspects of real life). Traditionally, applied behavior analysis (ABA) and activity schedules are evidence-based approaches that have been used to teach play behaviors to individuals with ASD. However, few researchers have evaluated how a linked digital activity schedule can increase the sociodramatic play responding …

Development Of The Sexual Mindfulness Measure For Abstinent Persons, Kaitlyn Zito

All Graduate Theses and Dissertations, Fall 2023 to Present

Sexual wellbeing plays a crucial role in overall health, influencing physical, emotional, social, and even spiritual aspects of life. One key factor in sexual wellbeing is sexual mindfulness, or the ability to be aware and accepting of one's sexual thoughts, feelings, and sensations. While previous research has focused on sexual mindfulness in romantic relationships, little is known about how it applies to abstinent individuals. To address this gap, I developed a 16-item validated measure of sexual mindfulness specifically for abstinent individuals: the Sexual Mindfulness Measure for Abstinent Persons (SMM-AP). This tool adapts key elements from the Five Facets of Mindfulness …

Development Of Saddlepoint Methodologies For Sparse Sample Multiple Parameter Generalized Linear Models And Correlated Data Scenarios, Christopher Johnson

All Graduate Theses and Dissertations, Fall 2023 to Present

Parameter estimation using maximum likelihood techniques may be biased when sample sizes are small, event rates are low, or otherwise sparse counts exist in a parametric model. This in turn may lead researchers to draw invalid statistical conclusions when conventional methods are utilized. The saddlepoint approximation has potential to lessen the degree of bias in sparse data conditions through its use of moments beyond the mean and variance, which allows for more accurate approximations using a smaller number of observations. We propose two novel saddlepoint methods for use in practical analysis scenarios, as an alternative to maximum likelihood estimation. First, …

Gone With The Flow: Flow Reduction Coincides With Reduced Metabolism And Standing Stock Of Benthic Algae And Macroinvertebrates In Desert Rivers, Chloe E. Lyles

All Graduate Theses and Dissertations, Fall 2023 to Present

River metabolism, the measure of energy flow in a river, is driven by hydrological and physicochemical regimes (e.g., temperature, turbidity, and nutrients). However, these regimes are increasingly altered by human water demand and climate change-driven drought. These stressors alter the magnitude, timing, and duration of critical spring-snowmelt floods with poorly understood consequences on ecosystem function, particularly in desert rivers. To investigate the linkages between flow reduction, river metabolism, and basal food resource productivity (i.e., algae and aquatic invertebrates), we measured metabolism and basal resource availability in seven desert tributaries with varying degrees of flow reduction during low-flow conditions in 2023 …

Learning Intentions, Success Criteria, And Metacognition: The Influence Of A Professional Development For Grades Three To Five Teachers, Jason Hart

All Graduate Theses and Dissertations, Fall 2023 to Present

Formative assessment is a strategy that teachers use to improve student learning. This study explored how professional development focused on assessment for learning practices (AFL), with the main emphasis on learning intentions and success criteria, influences teacher use of those strategies and changes in teacher and student metacognition. The overarching research question was: How does professional development on AFL practices influence teachers' reported use of AFL practices and teacher and student metacognition? This study utilized a mixes-methods research design and provided professional development on AFL practices to 16 in-service elementary mathematics teachers and measured changes to their AFL practices and …

Irrigation Performance Connection To Water Quality In Big Creek, Sena Bildim

All Graduate Theses and Dissertations, Fall 2023 to Present

Due to new technologies and improved water management strategies, sprinkler irrigation systems are becoming more common in Utah and nearby areas. These systems are generally thought to be more efficient, but their effects on water quality are not well understood. This study focuses on the Big Creek watershed, which flows into Bear Lake—an area where water quality concerns are increasing.

The purpose of this research was to explore how different irrigation systems—sprinkler and surface—affect both water use and water quality. Field tests were conducted to measure how evenly water was applied and how efficient each system was. Water and soil …

Understanding The Impact Of Colloidal Calcium Phosphate On The Ph Variation In Cheddar Cheese During Early Stages Of Aging, Rachel Lindstrom

All Graduate Theses and Dissertations, Fall 2023 to Present

The Cheddar cheese industry has recently observed variation in the pH of their cheese during the early stage of storage. This variation may be due to the addition of the faster acid producing thermophilic starter culture Streptococcus thermophilus which was recently introduced into the Cheddar cheese making process. This starter culture may impact the calcium buffering properties of the cheese due to more retention of the insoluble calcium (INSOL Ca) within the cheese. To investigate this problem, we studied how insoluble calcium affects cheeses with pH ranging from 4.8 to 6.6 and found that INSOL Ca was positively correlated with …

Caregiver Implemented Standardized To Individualized Behavior Analytic Toilet Training Package For Autistic Preschoolers, Jessica A. Osos

All Graduate Theses and Dissertations, Fall 2023 to Present

Autistic children often face challenges with toilet training and may benefit from a more structured and systematic approach compared to methods used for neurotypical children. While research and literature in this area has shown that behavior analytic toilet training packages can lead to increasing successful urinations and reducing accidents for autistic children, limitations such as not including caregivers as the individuals implementing the package, unsustainable sit schedules, and lack of acceptable levels of checks for accurate data collection and implementation of procedures highlight the need for refining of implementation oversight and examination of updated toileting procedures without the use of …

Determining The Structure And Function Of Type Iv-A Anti-Crisprs, Olivine Redman

All Graduate Theses and Dissertations, Fall 2023 to Present

Bacteria face a constant existential threat in the form of infection by viruses along with other forms of mobile genetic elements, such as bacteriophage and transposable elements. To survive, bacteria and other prokaryotes have evolved various immune systems to evade these would-be invaders. One such immune system is the CRISPR-Cas system, an adaptive immune system able to record the genetic signature of invading viruses in order to recognize and destroy them should they be encountered again in the future. In this thesis I present data that sheds light on the mechanism of one particular subtype of CRISPR-Cas systems: the type …

A Survey Of Master's Qualifying Exam Practices And Content In Real Analysis, Zachary M. Coverstone

All Graduate Theses and Dissertations, Fall 2023 to Present

Graduate programs in mathematics are intended to develop experts in mathematics. As part of a graduate program, many students are expected to engage in a qualifying examination that can serve myriad purposes. This dissertation investigates real analysis qualifying examinations at the master's level through a nation-wide survey of institutions in the Association of Public and Land-Grant Universities (APLU). This study reveals the practices in administration of real analysis qualifying exams, institutions reported offering traditional, pencil-and-paper exams and generally asked students to prepare individually using previously administered exams. The survey results show that approximately two in three APLU institutions offering master's …

Investigating Stability Of Cone-Derived Hypersonic Waverider Vehicles Via Design Space Exploration, Adam S. Weaver

All Graduate Theses and Dissertations, Fall 2023 to Present

It may come as no surprise that man-made objects flying at 5, 10, or even 25 the speed of sound (termed hypersonic) are difficult to design, inefficient in flight, and expensive to deploy. Most hypersonic vehicles are effectuated in ballistics, which simplify aerodynamic considerations owing to their fixed trajectory. However, maneuverable hypersonic vehicles can revolutionize commercial flight, national defense, and space travel. One candidate for such missions are waverider vehicles. Waverider vehicles cruise on a cushion of air generated by its own shock wave, essentially enjoying extra lift without any extra drag penalties (which are usually inherent to extra …

Increasing The Spatial Resolution Of Snow Hydrology Data And Augmenting Existing Hydrology Monitoring Networks Using Low-Cost Snow Sensing Stations, Braedon Dority

All Graduate Theses and Dissertations, Fall 2023 to Present

Snow is a crucial part of the water cycle, especially in mountainous regions where melting snow provides water for millions of people. However, accurately measuring how much water is stored in snow is challenging. Current monitoring networks, such as the snowpack telemetry (SNOTEL) network in the western United States, provide valuable data, but have gaps in coverage and are expensive to operate and expand. This research explores a more affordable way to improve snow measurements by designing and testing low-cost snow sensing stations. These stations use open-source datalogger and software technology along with research-grade sensors to measure important snow variables. …

Blind Construction Of A Party Check Matrix For Arbitrary Linear Block Codes, Aaron J. Womack

All Graduate Theses and Dissertations, Fall 2023 to Present

Communication systems are systems in which a transmitter sends data across a channel to a receiver. In any modern communication system, Forward Error Correction (FEC) is used to detect and correct errors that occur during transmission. As communication systems have developed over the years, many FEC algorithms have been proposed. Each FEC algorithm has parameters that can be selected based on the needs of the communication system. Typically, the transmitter and receiver are both aware of the FEC parameters, but in some cases the receiver may not know how the transmitter encoded its message. In this case, the receiver must …

Component Analysis Of Interactive Computer Training To Teach Paraprofessionals To Deliver Behavioral Skills Training, Scott V. Page

All Graduate Theses and Dissertations, Fall 2023 to Present

In education and Applied Behavior Analysis, there is growing demand for well-trained entry-level individuals to deliver behavior interventions. Interactive Computer Training allows trainees to access online instruction with video demonstrations, interactive tasks, and feedback, without a live instructor. This training approach could save valuable training time and money. Prior researchers demonstrated these types of training can teach trainees to correctly use behavior interventions. There are gaps in our understanding of Interactive Computer Trainings that limit its successful use. Few studies measured cost-effectiveness, identified the effective features of Interactive Computer Training (e.g., videos, quizzes, feedback), or trained users to deliver effective …

Conservation Laws For Asymptotically Perfect Fluid Spacetimes, Lyle Arnett Jr.

All Graduate Theses and Dissertations, Fall 2023 to Present

In physics, conservation laws, like those for energy or momentum, are powerful tools that help us understand how systems evolve and interact. In general relativity, where spacetime itself is curved by matter and energy, defining such conservation laws becomes especially subtle and complex. Traditional methods rely on idealized conditions like empty space or special symmetries, which limit their usefulness in more realistic, dynamic settings such as an expanding universe.

This dissertation explores a modern mathematical framework, developed by Iyer and Wald, that allows conservation laws to be derived directly from the equations governing spacetime. Using this approach, I examine not …

Breach Modeling Flume Tests, R. M. Monteiro-Alves, R. Moran, M. Á. Toledo, M. Morris, C. Picault, J-R. Courivaud

5th International Seminar on Dam Protections Against Overtopping

From previous flume tests conducted in the framework of the OVERCOME Project, intended to investigate the effect of different soil materials, overflow discharges, and upstream face watertightness on the breaching processes of overflowed levee sections, we determined the need for further investigation on the effect of test repeatability, content of fines and armouring caused by the coarser particles. This document presents the results of this new set of tests which have shown an impact of these variables on the breach macro erosion processes, erosion rates and breach dimensions.

Physically Based Assessment Of Flow Resistance In Stepped Chutes, T. L. Wahl, B. J. Heiner, K. R. Smithgall, C. C. Shupe, J. Falkenstine

5th International Seminar on Dam Protections Against Overtopping

Existing physically based methods for estimating stepped chute friction factors or energy dissipation rates consider relative step height and relative step-tip spacing to be key factors, but do not fully account for chute slope and associated step orientation. For slopes steeper than 45° each step acts as an offset into the flow, while for flatter slopes each step presents an offset away from the flow, but methods that consider only the step-tip spacing do not account for this difference. Furthermore, most experimental studies have been performed in open channel spillway models, where two-phase air-water flow and variable flow depths make …