Digital Commons Network^™

Effects Of Light Intensity On Algae Biofilms In Rotating Algae Biofilm Reactors (Rabr), Joshua D. Wintch

All Graduate Theses and Dissertations, Fall 2023 to Present

There is a growing need for economically and ecologically friendly wastewater treatment processes. Utilizing natural algae biofilms to remediate excess nitrogen and phosphorus from municipal wastewater is a treatment technique of academic interest. Utilizing natural algae in rotating algae biofilm reactors (RABR) is a potential engineering application of algae biofilms for municipal wastewater anaerobic digestor effluent treatment. The ideal reactor operation would use sunlight as the light source for algae growth, however, there is little academic research on algae biofilm growth productivity across natural sunlight light intensity ranges. This research seeks to understand the relationship between rotating algae biofilm reactor …

Potamogeton Crispus Invasion: Impacts On Native Aquatic Plants And Associated Faunal Habitat, Meghan-Grace Slocombe

All Graduate Theses and Dissertations, Fall 2023 to Present

Aquatic invasive plants are non-native plants that invade a water body and displace native aquatic plants. Invasion depletes the native plant community's ability to provide ecosystem services, including improved water quality, decreased problematic algae, and increased animal habitat. The loss of these ecosystem services reduces the value of fishing, boating, and swimming opportunities in aquatic ecosystems. The potential changes in plant communities and services are particularly important at sites targeted for restoration because project goals typically include increasing ecosystem services, including wildlife habitat. Curly-leaf pondweed (Potamogeton crispus L.) is a problematic invasive species in North America. To better manage …

Learning Outdoors: A Pilot Program For Early Childhood Educator Professional Development, Cari Lee Gongora

All Graduate Theses and Dissertations, Fall 2023 to Present

Research supports the use of outdoor spaces as a learning environment for child development; however, some early childhood educators may struggle to support learning when outdoors with young children. Reframing teacher mindset towards outdoor environments, gaining a knowledge of child development, and understanding how it applies within the context of naturalist studies have been identified as three key areas supportive for early childhood educators as they work outdoors with young children. Additionally, designing professional development sessions with targeted material, opportunities for observations, and providing time with a coach for support may further support learning and implementation of targeted material.

This …

Designing Accessible And Dependable Tools For Vocational Rehabilitation Data Analysis, Ruth E. Taylor

All Graduate Theses and Dissertations, Fall 2023 to Present

Since 1973, the U.S. Rehabilitation Services Administration (RSA) has partnered with state vocational rehabilitation (VR) agencies to help individuals with disabilities achieve meaningful employment and independence. RSA-911 datasets play a crucial role in this effort by capturing detailed participant data, but their complexity can hinder effective analysis.

To simplify this process, we present an R software package to streamline the cleaning and analysis of RSA-911 and Transition Readiness Toolkit (TRT) data, a new measure of program effectiveness. We also deliver a user-friendly dashboard, empowering both VR researchers and counselors with the opportunity to conduct analyses. Using our developed tools, we …

Seasonal And Temporal Influences On Successful Crossing Rates By Ungulates Of A North Utah Wildlife Overpass, Blake Ledbetter

All Graduate Theses and Dissertations, Fall 2023 to Present

Encroachment of human infrastructure fragments wild landscapes and introduces a suite of negative impacts for humans and wildlife. In Utah, roadways threaten migratory ungulates by creating a barrier to movements and preventing access to seasonal migration routes. To mitigate these conflicts, state transportation agencies often install wildlife crossing structures to allow animals to safely cross over or under roadways. Selecting the proper crossing structure requires consideration of the species of interest, landscape, location, and structural dimensions. Often there is balance between the optimal location, the dimensions of the crossing structures, and what is feasible given the landscape. In 2018, the …

Identifying And Addressing Current Gaps In Knowledge And Treatment Dissemination For Individuals With Trichotillomania, Leila K. Capel

All Graduate Theses and Dissertations, Fall 2023 to Present

Trichotillomania is an impairing and debilitating mental health condition, and while the research in this area is growing, this population is underserved. The aim of this project was to identify gaps in the research that may be contributing to lack of treatment access and begin filling those gaps. The first gap is knowledge of how treatments work and for whom they work best. While there are a variety of treatment options and ways of delivering treatment, individual factors that predict who will benefit most are not well investigated. We explored the individual factors, and aspects of treatment that we believe …

Deterring Gray Zone Activity In A Strategic Flashpoint: U.S. Freedom Of Navigation Operations And China’S Maritime Militias, Joseph D. Potter

All Graduate Theses and Dissertations, Fall 2023 to Present

In today’s complex world, nations often use irregular forces, such as militias, to achieve political goals without escalating conflicts. This study examines how the United States of America uses its Navy’s Freedom of Navigation Operations in the South China Sea to influence the behavior of Chinese maritime militias. These militias are involved in activities such as harassment, assault, and other aggressive or deceptive actions. By analyzing data from 2012 to 2024, this research discovered 239 incidents and discovers that these militias reduce their confrontational activities during Freedom of Navigation Operations to avoid direct conflict while continuing their broader objectives in …

Measuring Support In Couple Relationships: The Psychometrics Properties Of The Couple Support Behavior Questionnaire, Jacqueline Johnson

All Graduate Theses and Dissertations, Fall 2023 to Present

Couple support, a unique form of social support, as defined in this thesis is the felt sense of being upheld, valued, lifted up, and empowered by your romantic partner, during both times of distress and success. In this master’s thesis, I used secondary data provided by Dr. Ryan Seedall and conducted statistical analyses to develop a new measure, the Couple Support Behavior Questionnaire (CSBQ). Using data from 443 individuals who had all been in a relationship for at least three years and were all above the age of 18, I used statistical methods to shorten and provide a 19-item measure, …

Quantifying The Threshold For Fragmentation Of Newtonian And Non-Newtonian Drops, Aditya Parik

All Graduate Theses and Dissertations, Fall 2023 to Present

This dissertation investigates how the properties of liquid drops influence the minimum aerodynamic forces needed to cause the drop to fragment (breakup). For this work, we focus only on aerodynamic forces that are applied on a stationary drop by a sudden, uniform flow, a process called impulsive acceleration. Previous studies have largely focused on the fragmentation of spherical drops of Newtonian fluids (liquids with constant viscosity, like water), when impulsively accelerated in air-like ambient medium. Such systems only capture a limited range of drop and ambient properties (described by non-dimensional groups). Many real-world applications, such as aerial fire retardant delivery, …

A Pavlovian, Conditioned-Reinforcement Approach To Reducing Impulsive Choice, Katherine Garland

All Graduate Theses and Dissertations, Fall 2023 to Present

Persistent impulsive choice (the preference for a smaller-sooner over a larger-later reward) is associated with consequential life outcomes. Procedures that reduce nonhuman impulsive choice have long training durations that may reduce their translational utility. The purpose of this experiment was to test a new behavioral intervention to reduce impulsivity that requires few sessions to implement. Delay-bridging stimuli (stimuli presented during the delay to a reward) have been shown to reduce impulsive choice, but delay-bridging stimuli may also be aversive. Conditioned stimuli (CS) established through Pavlovian training are, on the other hand, attractive, potentially even functioning as a conditioned reinforcer (CR). …

Novel Horticultural Approaches For Reduced Gravity And Controlled Environment Agriculture, Sarah Elizabeth Schreck

All Graduate Theses and Dissertations, Fall 2023 to Present

On July 16, 1969, Apollo 11 achieved the first successful moon landing, marking a significant milestone in human space exploration. This historic moment effectively ended the space race between the United States and the Soviet Union, and since then, countries around the world have continued to advance their space programs. While the space race has evolved, the next major challenge lies in sending humans to Mars—a journey that could take 6 to 9 months each way, presenting numerous challenges, including the critical issue of nutritional sustainment for the crew.

This thesis addresses key aspects of a broader effort to support …

The Impact Of General And Religious/Spiritual Minority Stressors On Lgbtq Spiritual Health, Adlyn Perez-Figueroa

All Graduate Theses and Dissertations, Fall 2023 to Present

A great deal of research has focused on the impact of minority stress on the mental and physical health of lesbian, gay, bisexual, transgender, and queer (LGBTQ) individuals, but little is known about how minority stress impacts spiritual health. The purpose of this study was to develop a new theory of LGBTQ spiritual health. Another purpose was to explore how the impact of minority stress, such as discrimination, differs in everyday settings vs religious/spiritual (R/S) settings. A total of 227 LGBTQ participants were recruited online using a Prolific Survey Panel. Multiple regression analyses were used to determine: (a) if minority …

Challenging Behavior In Inclusive Postsecondary Education Programs, Samantha J. Nercesian

All Graduate Theses and Dissertations, Fall 2023 to Present

Inclusive postsecondary education programs – higher education programs that are specifically designed for individuals with intellectual disabilities – have grown exponentially in the last 10 years. With this growth has come the emergence of several barriers to inclusive postsecondary education admission and completion. Given the relatively short time inclusive postsecondary education programs have existed, only a small amount of research has looked into barriers that prevent graduation from inclusive postsecondary education programs. One barrier in particular has received little to no attention from researchers – challenging behavior. Challenging behavior is a construct that includes socially inappropriate behaviors, which may harm …

Uv-A Light And Heat-Activated Antimicrobial And Biodegradable Materials For Food Packaging And Preservation, Michael J. Bodily

All Graduate Theses and Dissertations, Fall 2023 to Present

Current food packaging materials are often non-biodegradable and harmful for ingestion, which poses a threat to the environment and public health. Thus far, the dangers of microbial contamination of food on human health have outweighed the risks associated with using these conventional packaging plastics. A possible solution to these issues is to use a combination of innovative materials and microbial inactivation methods that can potentially both reduce plastic waste and combat harmful microorganisms. In this study, two antimicrobial, biodegradable composites were developed and tested for their ability to inactivate two types of bacterium, Escherichia coli K12 and Listeria innocua, …

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 …

Analyzing Sedentism In The Built Environment: A Case Study In Archaeological Geophysics At Boundary Village, Uintah County, Utah, Alix Sofie Piven

All Graduate Theses and Dissertations, Fall 2023 to Present

This thesis presents a case study that evaluates the ability of near-surface remote sensing to generate archaeological data suitable to answer questions about human behavior. Specifically, this project assesses the ability of two remote sensing methods, ground-penetrating radar (GPR) and magnetic gradiometry to resolve subsurface archaeological features that are markers of sedentism. In this study, the markers of sedentism are features of village sites where their variability is linked to the anticipated and actual length of time spent occupying a domestic site. A comparative dataset was generated to assess how specific subsurface archaeological features would look in GPR and magnetic …

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 …

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 …

"Once Our Land Is Gone, It's Gone": Farmer Perspectives On Growth, Embeddedness, And The Future Of Food In The Great Salt Lake Basin, Bryn Noelle Watkins

All Graduate Theses and Dissertations, Fall 2023 to Present

The Great Salt Lake Basin hosts a knot of intensifying pressures on agriculturalists—including economic constraints, as even arable land is increasingly valuable for development, and ecological constraints, as aridification and climate change affect the conditions in which food can grow. Given the unique relationship farmers have with the land as its modern-day stewards, their perspectives on the nature and consequences of these pressures offer profound insights into how the region might responsibly navigate its resource management and food systems moving through the future. In the first paper, I draw upon 15 interviews with commodity farmers to understand their experiences with …

Optimizing Nutrient Recycling To Achieve Zero–Discharge Management For Controlled Environment Agriculture, Noah James Langenfeld

All Graduate Theses and Dissertations, Fall 2023 to Present

Controlled environment agriculture (CEA) allows for human control of one or more environmental factors affecting crop production. Optimizing nutrient management in such systems allows for translation and predictions of sustainable management strategies in the field. These systems will be used to supply fresh food as public and private space agencies are planning to send humans to the Moon and Mars in the near future. Food resupply becomes increasingly difficult as the distance from Earth increases. Plants can be grown off-Earth as a food source, but their growth must be carefully managed to ensure long-term sustainability. I describe a model used …

Effects Of Plant Biostimulants On Onion Growth And Production Under Greenhouse And Field Conditions, Prakriti Nepal

All Graduate Theses and Dissertations, Fall 2023 to Present

The escalating impact of climate change on agricultural production underscores the need to investigate sustainable crop enhancement methods. This research explores the use of plant biostimulants to grow onion (Allium cepa L.) under varying environmental conditions. In the initial germination and greenhouse screening, seven biostimulants were tested on ‘Vaquero’ onion seeds: three bacterial products (Continuum, Spectrum DS, and Tribus Original), two mycorrhizal products (Mighty Mycorrhizae and Myco Apply), one seaweed extract product (Seaweed), and one product containing humic acid (Huma Pro 16). Mighty Mycorrhizae, Continuum, and Myco Apply supported faster germination, while seeds treated with Spectrum and Seaweed took …

A Laboratory Study Of Local Scour And Driftwood Effects At A Type A Piano Key Weir, Manisha Panthi

All Graduate Theses and Dissertations, Fall 2023 to Present

Piano key weirs are a unique weir designed to increase the amount of flow that passes over it via its zig-zag shape (similar to the rectangular shape of keys of a piano). With its relatively small footprint, they are becoming more popular to upgrade existing water management projects and are also being used in new construction works. However, there is little information available regarding how these weirs handle sediment and driftwood. Additional information will help researchers and designers to understand the challenges of upstream sediment buildup, driftwood accumulation, and the effects of floods on downstream scour with viable protection measures. …

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, …

A Comparison Of Principal Motivational Orientation And The Orientation Of Principal Actions To Motivate Teachers, Charles K. Stewart

All Graduate Theses and Dissertations, Fall 2023 to Present

This study was planned and conducted to evaluate the correlation between a principal’s dominant motivation type (intrinsic or extrinsic) related to their dominant method to motivate others (intrinsic or extrinsic). The study included nine elementary school principals who led schools to high levels of academic performance. Three participating principals were selected from a school with high poverty rates. Three other principals were selected from schools with medium poverty rates, and three more were selected from schools with low poverty rates.

The researcher collected information from the nine participating principals regarding factors that motivate them to improve student learning at their …

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 …

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 …

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. …

Quantifying Buoyancy-Driven Exchange Flows Over Obstacle At The Great Salt Lake Using Rans Cfd, Mohammad Ikram Hossain Talukdar

All Graduate Theses and Dissertations, Fall 2023 to Present

This study examines how barriers, such as berms, affect the movement of water in the Great Salt Lake in Utah. The lake experiences two types of water flow: one, called a unidirectional gravity current, where denser water flows in a single direction, and another, known as buoyancy-driven exchange flow, where water flows in two opposite directions due to differences in both water density and surface elevation. These flows are important for understanding how water mixes and moves between the northern and southern parts of the lake. Using computer models, we simulated how these two types of water flows behave when …

Color Expressions In Euripides’ Ion, Erik Shelley

All Graduate Theses and Dissertations, Fall 2023 to Present

This analysis explores color expressions in the play Ion by the ancient Greek playwright Euripides. Because the ancient Greeks experienced color differently, I examined words used in the play, including light, dark, fire, green, water, blood, and gold. These expressions imply different themes and concepts that Euripides uses to portray the duality between his two main characters, Ion and Creusa. This thesis showed how the mother-son pair acts as a foil for the different aspects of color found throughout the play that reflect ancient Greek culture.

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 …