Digital Commons Network^™

Optimization And Utilization Of Microbial Electrolysis Cells In Waste To Product Applications, Hayden Harrison

All Graduate Theses and Dissertations, Fall 2023 to Present

As the world searches for cleaner and more sustainable energy solutions, turning waste into fuel is an increasingly attractive strategy. This research focuses on microbial electrolysis cells, a new technology that uses bacteria and a small amount of electricity to convert organic waste—like food scraps or wastewater—into useful gases such as hydrogen and methane. These gases can be used as energy sources to reduce dependency on more traditional fuels.

This thesis tackles two key challenges that limit the real-world use of microbial electrolysis systems. First, it introduces a simpler and more effective method to stop hydrogen losses in single-chamber cells. …

Factors Influencing Cognitive Load: Exploring Affective Elements, Motivational Constructs, And Regulatory Strategies In Learning, Rebecca B. Brockbank

All Graduate Theses and Dissertations, Fall 2023 to Present

There are three separate research papers within this dissertation, each looking at specific elements of learning. The process of learning is a complex phenomenon that includes not just cognitive aspects, but also emotional and motivational aspects. During learning there is an input of information into our cognitive system (i.e., minds). When too much information is given or the information is not presented effectively, this can overload our cognitive system and negatively impact our learning. Understanding how to learn within the parameters of our cognitive system is important. However, learning is more complex than just the simple input and output of …

Ctso Implementation In Secondary Education: Insights Into Teacher Motivation, Barriers And Training Needs, Ariane Crystal

All Graduate Theses and Dissertations, Fall 2023 to Present

This study explores the role of Career and Technical Student Organizations (CTSOs) in enhancing the educational experiences of secondary Career and Technical Education (CTE) teachers in Utah. By surveying CTE educators, the research identifies key factors that motivate teachers to implement CTSOs, as well as barriers they face in doing so. The findings indicate that a significant majority of teachers recognize the value of CTSOs for fostering student engagement and career readiness. Key motivators include support from school administration and access to professional development, while challenges such as time constraints and resource limitations hinder participation. The study highlights the importance …

Cognitive Behavioral Therapy Complemented With Emotion Regulation Training For Patients With Somatic Symptom Disorder: 3-Year Follow-Up To A Randomized Controlled Trial, John Barr

All Graduate Theses and Dissertations, Fall 2023 to Present

This manuscript is a 3-year follow-up analysis of a multicenter, randomized, parallel group, controlled trial (N = 254) employed with individuals struggling with somatic symptom disorder (SSD; Kleinstäuber et al., 2019) comparing the effects of cognitive behavioral therapy (CBT) alone and enriching cognitive behavioral therapy with emotion regulation training (ENCERT). Results from Kleinstäuber et al. (2019) suggested that both of these interventions were similarly efficacious for SSD for symptom severity (primary outcome), with moderate to large effects at post treatment and 6-month follow-up. Further analysis of secondary outcomes and moderation effects demonstrated results suggesting ENCERT was superior to CBT-SOMA …

Population Analysis Of Cyanobacteria In Rotating Algal Biofilm Reactors, Eric H. Matthews

All Graduate Theses and Dissertations, Fall 2023 to Present

Algal biofilms have numerous applications in wastewater treatment and bioproduct production. The Sustainable Waste-to-Bioproducts Engineering Center at Utah State University is working to develop rotating algal biofilm reactors (RABRs) to remove excess nitrogen and phosphorus from wastewater effluent while producing biomass for downstream production.

Genetic analysis of algal biofilms on various RABRs was performed to gain improved understanding of the biofilm populations. This analysis focuses on a pilot-scale RABR and how it compares to several other RABRs. Additionally, old methods of genetic analysis filtered out important cyanobacterial populations. A new method was developed to identify the cyanobacteria within the biofilms. …

Balancing Native Wetland Types And Ecosystem Function Conservation In The Face Of An Aggressive Plant Invader, Aubin A. Douglas

All Graduate Theses and Dissertations, Fall 2023 to Present

Wetlands provide a multitude of ecosystem services that are important to people including water filtration, flood attenuation, carbon sequestration, and recreational opportunities such as birding and hunting. Wetland plants support these services by performing important underlying ecological processes called ecosystem functions which include removing heavy metals from water and providing habitat for migratory birds. The provisioning of these functions varies through space and time, by vegetation type, and via impacts from other factors like climate and management actions. Wetland managers are responsible for maintaining these functions and services within their management complexes to align with their agency’s mandates. Unfortunately, managers …

Modeling For Functional Traits In Bluebunch Wheatgrass Using Unmanned Aerial Vehicle (Uav) High-Throughput Phenotyping, Brittany L. Johnson

All Graduate Theses and Dissertations, Fall 2023 to Present

Changing climates and shifts in community composition in the Intermountain West threaten sagebrush-steppe ecosystems, impacting both plants and animals. Restoring native grasses like bluebunch wheatgrass (Pseudoroegneria spicata; BBWG) can help ecosystems resist invasive species and recover from stress and disturbances. As a native cool-season grass, BBWG is widely used in rangeland restoration for the western U.S. Breeding programs for restoration plant materials, such as seeds for ecological projects, often require years or decades of field testing while facing staffing constraints. High- throughput phenotyping (HTP), which rapidly measures observable plant traits, offers a faster solution using drones to capture time-series …

A Value Sensitive Design Approach To Reimagining Parental Control Apps, Prakriti Dumaru

All Graduate Theses and Dissertations, Fall 2023 to Present

Parental control apps are often used by families to regulate children's device usage and keep them safe online. However, existing tools focus on monitoring and restricting children, which can lead to tension and mistrust within families. This research takes a new approach by exploring how parental control apps can be redesigned to support positive family values, like encouraging open communication between parents and children and helping children self-regulate their behaviors. Through four in-depth studies, this dissertation looks at how these values play out in different real-life situations. It includes families with children on the autism spectrum, divorced households where parents …

Beyond The Click: Investigating Mental Models, Targeted Attacks, And Behavioral Interventions Against Clickbait, Ankit Shrestha

All Graduate Theses and Dissertations, Fall 2023 to Present

Clickbait is misleading or exaggerated content on social media that tricks people into clicking on links by making them curious. For instance, posts that use headlines such as “This is the worst day to visit a restaurant”. These clickbait posts can lead to fake news, wrong information, and even harmful websites. Even though many people know clickbait can be risky, they often still fall for it. Existing tools to stop clickbait don’t always consider how people think, the situations they are in, or their different needs. This research looks at how people understand and react to clickbait, and develops different …

Precision Agriculture Applications In Tart Cherries: Yield Mapping Technologies And Remote Sensing For Water Stress Estimation, Anderson Luiz Dos Santos Safre

All Graduate Theses and Dissertations, Fall 2023 to Present

Tart cherry is an important specialty crop in the United States, particularly in Utah where the area dedicated to tart cherry cultivation is larger than any other fruit grown in the state. However, growers face increasing challenges due to rising land prices, limited water availability, and extreme weather events. These factors make it essential to adopt new technologies that improve efficiency and sustainability. Precision agriculture, which uses data-driven tools to manage crops more effectively, can help address these challenges. However, most tart cherry orchards still rely on traditional practices due to a lack of specialized technologies for this crop. This …

Remote Detection Of Pest Damage And Tree Health In Tart Cherry, Christina Klara Lilligren

All Graduate Theses and Dissertations, Fall 2023 to Present

With the increasing affordability of technology, using technological advancements to assess tree health might soon become a possibility in low input crops such as tart cherry. We evaluated the ability of drone-mounted multispectral cameras, ceptometry

(canopy density), and soil conductivity meters (soil texture) to predict pest occurrence and remotely detect tree health. Pest scouting data were compared to the different technological datasets to identify the possibility of use for pest detection. While drone-mounted multispectral cameras were able to identify chlorotic trees, powdery mildew was not reliably detectable under a management threshold with current multispectral camera technology. Trees with low canopy …

Veils Of Oppression: An Exploration Of Paul Fitzsimmons Eve And His Impact On Enslaved Black Women's Lives, Zoe'swanna K. Mcgee

All Graduate Theses and Dissertations, Fall 2023 to Present

This thesis contributes to the ongoing study of gender, race, and medicine in the United States, focusing on Dr. Paul Fitzsimmons Eve and his practices. By examining the experiences of enslaved black women subjected to his surgical procedures and experiments, medical racism, harm, and exploitation become visible.

Quantifying The Sensitivity Of Land Use Land Cover Metrics Through Simulation Techniques, Haley Burger

All Graduate Theses and Dissertations, Fall 2023 to Present

As human activities and climate change continue to reshape our landscape, understanding how land use changes over time is becoming increasingly important. Accurate ways to track and analyze these changes are essential for governments, businesses, and communities to make informed decisions. Monitoring agricultural land is particularly critical, as shifts in land use can impact food production and environmental pollutants. One of the primary tools used in the United States to monitor agricultural land is the Cropland Data Layer (CDL), an annual map created by the United States Department of Agriculture (USDA) from satellite images. While the CDL is highly accurate, …

Linking Variation In Mule Deer Nutritional Condition And Age To Population Performance In A Temperate Environment, Kent R. Hersey

All Graduate Theses and Dissertations, Fall 2023 to Present

The amount of body fat animals have as they enter and exit winter can have major impacts on how well they survive and reproduce. Mule deer are widely distributed herbivores whose survival and reproduction are strongly tied to weather patterns and the quality of vegetation they consume, which in turn impacts nutritional condition. The objective of this study was to identify and quantify the factors (animal specific, climatic, or habitat) influencing mule deer body fat during both summer and winter in Utah and examine how nutritional condition influences survival. We found December body fat was most affected by December lactation …

An Ant-Colony Approach To Scheduling Charging Sessions Of Electric Vehicle Fleets With Heterogeneous Scheduling Constraints, Derek D. Redmond

All Graduate Theses and Dissertations, Fall 2023 to Present

Electric vehicles and electric-vehicle fleets are gaining widespread usage. A major challenge of managing an electric-vehicle fleet is scheduling when the vehicles can charge and when the vehicles can complete their tasks. Finding smart ways to schedule electric-vehicle charging reduces both the cost of charging vehicles and increases the health of the grid and the environment. This best-of-both-worlds outcome is because of the pricing structure that electric utility companies use. When minimizing the cost of charging the vehicles, it is important to consider that vehicle fleets have constraints on when they can charge. Vehicles are usually limited by the tasks …

Exploring The Long-Term Impact Of Dating And Family Violence On American Indian Youth And Adults: The Role Of Belongingness In Moderating Negative Effects, Racheal M. Killgore

All Graduate Theses and Dissertations, Fall 2023 to Present

Exposure to violence during childhood and adolescence is an important issue, particularly among Native Americans, who experience violence at higher rates compared to other racial/ethnic groups. This early exposure to violence can significantly affect future physical and mental health outcomes—including depression, substance abuse, suicide attempts, obesity, and premature death—while also shaping subsequent relationships in adulthood. Though widely studied in the general population, research focused on American Indians is lacking, with cultural contexts and factors uniquely shaping the experiences of those affected. In AI/AN communities, belongingness is important for well-being and, as such, is a relevant cultural factor that calls for …

Protecting The Dreams Of Indigenous Psychology Trainees: Stories Of Culturally Competent Supervision, Erica Ficklin

All Graduate Theses and Dissertations, Fall 2023 to Present

Supervision is the process through which current psychologists pass on important lessons about providing clinical services to the community. Through supervision, psychology trainees learn how to make therapy beneficial to as many people as possible, how to balance their work as therapists with their personal lives, and how to continue learning new skills throughout their careers. Because supervision is vitally important to the field of psychology and future psychologists, it is important that supervision support trainees from all cultural backgrounds. Currently, little research exists on culturally congruent supervision for Indigenous psychology trainees. This study aimed to add to the literature …

Migration As Adaptation: Place-Based Vulnerability Near The Drying Great Salt Lake, Dallin Johnson

All Graduate Theses and Dissertations, Fall 2023 to Present

The drying of the Great Salt Lake presents a complex and evolving threat to Utah residents, with wide-ranging environmental, economic, and health implications. This study explores the individual and structural factors impacting Utahns' ability to utilize migration as a form of adaptive capacity in response to these threats, using mobility justice and cumulative advantage and disadvantage theory as guiding frameworks. Drawing on survey data, a multilevel logistic regression model identifies key structural factors, including age, income, and gender, that influence perceived migration ability. Additionally, a 2x2 typology categorizes distinct profiles of vulnerability to the Great Salt Lake based on different …

The Experience Of Latine Parents During Covid-19: Coping, Support, And Wellness, Jazmin Lara

All Graduate Theses and Dissertations, Fall 2023 to Present

Documentation status affects not just individuals, but entire family units. This project shares the voices of Undocumented Individuals and their Loved Ones (UnLOs), specifically Latine parents navigating multiple, overlapping stressors. Data was collected during a particularly challenging time marked by the COVID-19 pandemic and threats to the Deferred Action for Childhood Arrivals (DACA) program. Participants shared how they cope with stress, who they rely on for social support, how they practice wellness, and the type of community programming they would like to see more of. This research was possible through the collaboration between the Latinx Immigrant Health Alliance (LIHA) and …

What’S The Beef With Agriculture? Evaluating The Effectiveness Of An Agricultural Literacy Intervention On Students’ Attitudes And Knowledge Toward Sustainability And Animal Agriculture, Jenny E. Bennett

All Graduate Theses and Dissertations, Fall 2023 to Present

Agricultural literacy is essential for helping individuals understand how food systems impact their daily lives and society. While most research has focused on students’ knowledge, this study addresses the underexplored role of attitudes—critical predictors of behavior—as outcomes of educational interventions. This research analyzed survey data collected before and after an agricultural literacy intervention delivered to high school students in school-based agricultural education (SBAE) programs. The curriculum focused on sustainability in animal agriculture.

Findings from paired samples t-tests showed statistically significant improvements in students' attitudes (from moderately neutral to more positive) and knowledge scores. Further analyses revealed that demographic factors such …

Impacts Of 4r Nitrogen Management And Water Optimization On Soil Health, Kamaldeep Kamaldeep

All Graduate Theses and Dissertations, Fall 2023 to Present

Farmers in Utah and Idaho are facing growing challenges due to high fertilizer costs, limited irrigation water, and pressure to improve long-term soil health. To better understand current practices and grower attitudes, a survey was conducted in 2020 targeting 5,000 producers of small grains, corn, and potatoes. Although the response rate was low, 146 growers representing over 25,000 hectares of cropland participated. Survey results showed that most growers are open to improving nitrogen and irrigation practices and care about their soil health, even if not all are fully using 4R or precision agriculture methods.

This thesis includes two field studies …

Setting Salinity Water-Quality Standards Protective Of Aquatic Life: Insights From Analyses Of The Effects Of Salinity On Stream Insects, Katlyn M. Gardner

All Graduate Theses and Dissertations, Fall 2023 to Present

Freshwater ecosystems are becoming saltier due to human activities like agriculture, urbanization, and resource extraction. This change in salinity is important because we know very little of how stream salinity affects aquatic insects at natural concentrations, much less at elevated concentrations. Increases in salinity may harm aquatic macroinvertebrates, which play important roles in stream food webs and are widely used as indicators of ecosystem health. Understanding how salinity affects aquatic insect growth, survival, and distribution is critical for developing effective criteria protective of aquatic life, but existing methods often rely on field surveys where multiple environmental factors covary, making it …

Soil Health On Utah's Farms And Ranches, Jenae Dean

All Graduate Theses and Dissertations, Fall 2023 to Present

The term soil health has gained popularity in agriculture due to prolonged droughts, rising food costs, and the growing public concern for sustainable and organic practices. Soil health practices can offer solutions to all of these pressures. This thesis provides Utah's farmers and ranchers with quantifiable data on implementing soil health practices in Utah's unique climate. It presents the first two years of on-farm trial results on yield and quality after implementing various soil health practices on five categories of crops: corn, mixed hay, alfalfa, produce, and dryland grain. Over a two-year period, none of the soil health practices resulted …

Water Conservation Strategies For Growing Ornamental Plants In Utah Landscapes, Jenny L. Koller

All Graduate Theses and Dissertations, Fall 2023 to Present

When early pioneers settled in Utah, they faced challenges living in a dry region with limited water. They built dams, canals, and irrigation systems by working together as a community to manage their water needs. However, adoption of European landscaping methods, farming and rapidly growing population increased water need while climate change and frequent drought reduced water supply.

Today, Utah is one of the driest states and uses more water per person than most other states in the nation. If things don't change, the state could run out of water by 2060. To address Utah's growing water challenges, this research …

Unwritten Rules: Black Utahns’ Experience With De Facto Segregation In Utah, 1940-1965, Jasmine Mercedes Lowe

All Graduate Theses and Dissertations, Fall 2023 to Present

This thesis examines life in Utah during the Jim Crow era, utilizing oral history interviews with African Americans who lived in the state between 1940 and 1965. The interviewees selected for this project describe their personal experiences with housing, employment, public spaces, medical assistance, and education discrimination.

Unveiling Insights From Complexity: Advanced Computational Techniques For High-Dimensional Medical Data, Devin P. Eddington

All Graduate Theses and Dissertations, Fall 2023 to Present

Healthcare generates vast amounts of data daily, from genetic profiles to hospital records, but much of it remains untapped due to its complexity. This dissertation develops new computational tools to unlock this data’s potential, aiming to improve patient care and medical research. Five projects tackle different challenges: Project 1 creates Deep MAGIC, a method to fill in missing genetic and image data accurately, vital for understanding diseases like cancer. Project 2 analyzes how the COVID-19 pandemic disrupted surgeries, finding a 27% drop and temporary complication rises in 2020, guiding future crisis planning. Projects 3 and 4 study kidney disease trials, …

Womanhood, Survival, And The American Revolution: The Correspondence Between John And Abigail Adams And Henry And Lucy Knox, Kristin Jaques

All Graduate Theses and Dissertations, Fall 2023 to Present

The letters of Lucy and Henry Knox and Abigail and John Adams sent between 1775 and 1782 show how women stepped out of their expected gendered roles with thoughts of survival, not because they wanted to challenge the patriarchal society prevalent in the American colonies during the American Revolution.

So Much Cooler Online: Social Media Usage By Agricultural Educators In Secondary Sbae Classrooms, Saydee C. Longhurst

All Graduate Theses and Dissertations, Fall 2023 to Present

Social media has become a powerful tool in education, helping teachers connect with students and share information in new ways. Agricultural educators are using platforms like Facebook and Instagram to promote agricultural literacy and engage students in an online format. This study explores how high school agriculture teachers use social media, what challenges they face, and how comfortable they are using it. Through an online survey and analysis of social media engagement data, this research highlights the benefits and personal evaluation educators have when using these platforms. The results show that while social media helps teachers share resources and connect …

Graph-Based Machine Learning: Higher-Order Interactions, Guided Generation, And Knowledge-Graph Tools, Thomas J. Kerby

All Graduate Theses and Dissertations, Fall 2023 to Present

This dissertation brings the power of graph thinking to three key challenges in modern AI, making complex data more transparent, generative design more controllable, and scholarly exploration more intuitive. First, we introduce Local CorEx, a new machine learning technique that uncovers hidden relationships among variables, making it easier to understand complex datasets without heavy computation. Next, we show how to guide the creation of new molecules by viewing the generation process itself as a walk through a "state graph," letting researchers steer outcomes toward desired chemical properties—without any extra model training. Finally, we deliver an open-source toolkit that builds interactive …

The Validation Of The Patient’S Endorsement Of The Biopsychosocial Model Of Chronic Pain (Peb) Scale In Young Adults, Mathias M. Sanyer

All Graduate Theses and Dissertations, Fall 2023 to Present

This research examined a new tool designed to measure how patients view their chronic pain. While healthcare providers increasingly recognize that chronic pain involves biological, psychological, and social factors (a "biopsychosocial approach"), no previous tool existed to assess whether patients share this perspective. This study tested the reliability and effectiveness of the Patient's Endorsement of a Biopsychosocial Model of Chronic Pain (PEB) Scale in young adults with chronic pain. Results confirmed the scale accurately measures a single, consistent concept and correlates with patients' willingness to consider new pain management approaches. Unlike in older adults, the scale didn't predict active maintenance …