Digital Commons Network^™

Developing An Independent Shallow-Water Survey For The Western Rock Lobster Fishery: Tracking Pre-Recruitment Abundance And Habitat Change, Lucy Rudd, Simon De Lestang, Owen Young, Benjamin Hebiton

Fisheries Research Reports

Background

Puerulus settlement has proven to be a good forecaster of legal recruitment of Western Rock Lobster entering into the commercial and recreational fisheries. However, in 2011, this relationship broke down, with average puerulus settlement levels not being reflected in commercial catch rates four years later. Some northern areas showed unexpectedly low catch rates, while other southern areas showed unexpectedly high catch rates. Since this change followed the 2011 marine heatwave, it was assumed that this event changed some component(s) which were important to the growth and survival of juvenile lobsters. It was determined that a better understanding of this …

Effects Of Applying Humic Acid In-Furrow At Potato Planting, Jonathan Tyler Price

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Many products are marketed towards potato farmers that purport to have a positive return on investment for yield and quality. Humic acids, which are comprised of long chained, organic molecules that can be naturally or industrially made, are currently being marketed in this way. The use of these materials is reported to improve nutrient uptake, increase soil health, encourage vigorous growth, and most importantly, increase yields.  From 2023-2025, the in-furrow application of humic acid containing commercial products was evaluated in Pennsylvania on the cultivars ‘Lehigh’ and ‘Waneta’. Black Label Zn, Duo Maxx, Fertiactyl RhiZn, Humi-flex FA, Hydra-Hume, and Monty's Liquid …

Feeding Ecology In Coastal Systems, Randi L. Cannon

Graduate Theses and Dissertations (2019 - present)

Oysters (Crassostrea virginica) are critical foundation species in estuaries, providing numerous ecological and economic benefits. However, oyster populations have diminished worldwide. Effective oyster restoration and aquaculture require a mechanistic understanding of the physiological and environmental factors that govern oyster feeding, growth, and resilience under changing coastal conditions. We investigated how oyster ploidy and environmental conditions influenced oyster feeding and investigated how changes in abiotic conditions affected behavioral performance of oyster drills (Stramonita spp.), a key oyster predator. To better understand feeding responses and behaviors of both predator and prey we 1) used in-situ filter feeding assays to determine if feeding …

Passive Microwave Remote Sensing Of Flash Drought Impacts On Vegetation, Quinton R. Deppert

School of Natural Resources: Dissertations, Theses, and Student Research

In 2002, Dr. Mark Svoboda characterized a new form of drought known as flash drought. Flash drought was defined as a rapid decline in vegetation health caused by severe heat and drought. In recent years, attempts to quantify the impacts of flash drought via precipitation, soil moisture, evapotranspiration, and temperature indicators have proliferated. What has rarely been quantified is what the rapid decline in vegetation health amid flash drought looks like through remote sensing. This is because vegetation health indices like the Normalized Difference Vegetation Index (NDVI) are derived from the visible and infrared regions of the electromagnetic spectrum and …

A Novel Method Of Protein Purification Using Hedgehog Proteins As An Inducible, Self-Cleaving Tag, Antonia Kladias

Undergraduate Honors Theses

Because removing extraneous purification tag sequences from native proteins can be challenging and costly, there is demand for simple all-in-one techniques that directly furnish a tagless, functional protein-of-interest (POI). Current tagless purification systems are based on intein biochemistry; however, intein-based purification requires expensive, specialized resins and the POI often must be fused to the intein’s C-terminus. In this thesis, I present a novel approach for tagless POI purification in which the Drosophila melanogaster hedgehog protein catalytic domain (HhC) is repurposed as a small-molecule inducible, self-cleaving element dubbed Gtag. With Gtag, the POI is fused to the N-terminus of HhC/Gtag with …

Addressing Nonignorable Missing Data And Heterogeneity In Prognostic Biomarker Assessment, Xinran Huang, Ruosha Li, Jing Ning, For The Alzheimer's Disease Neuroimaging Initiative

Faculty, Staff and Student Publications

Covariate-specific and time-dependent area-under-curve (AUC) is often used to evaluate the discriminative performance of biomarkers with time-to-event outcomes, particularly when certain covariates influence biomarkers' accuracy. In biomarker research, despite extensive efforts, missing data remain unavoidable, with nonignorable missingness posing significant challenges. This article focuses on estimating the impact of covariates on time-dependent AUC in the presence of nonignorable missing biomarkers. Assuming a parametric model on the missing probability, we leverage instrumental variables to address the identifiable issue and estimate the unknown parameters. We integrate the inverse probability weighting approach into the score equation of a pseudo partial likelihood for estimation …

Retrospective Analysis Of Implemented Project Management Within A Small-Scale Student Engineering Project: Beng Fountain Wars Team Case Study, Holli E. Jenkins

Biological and Agricultural Engineering Undergraduate Honors Theses

This honors thesis provides a retrospective analysis of how the 2025 inaugural University of Arkansas’s ASABE Fountain Wars Student Team could be improved through project management. Project commitment, early stakeholder influence, rich communication, and a detailed project plan are all attributes of successful projects, and the team’s strengths and weaknesses within these categories were determined through a team poll. After the poll was conducted, three methodologies, Agile, Hybrid, and Waterfall, were assessed to determine how they would effectively address the team’s weaknesses. A weighted objectives table was created to compare each methodology’s effectiveness across the management categories. The analysis revealed …

Enhancing Food Security In Stann Creek, Belize Using Meat Rabbits: Engineering Perspective, Lindsey Garretson

Biological and Agricultural Engineering Undergraduate Honors Theses

The purpose of this paper is to discuss the engineering perspective within the overall project of using meat rabbits to enhance food security and nutrition within Stann Creek, Belize. From the engineering perspective, the overarching goals were like the overarching project goals including the construction and materials required guide within the manual, designing potential upgrades to the design including a solar and battery system and an automatic watering system, and to design the system to be “practically sustainable” where possible. The constraints for this project included cost, the size of land dedicated for the rabbitry, and the operational and environmental …

An Analysis Of Global And Regional Human Rights Standards On Gender-Based Violence, Tamar Ezer, R. Denisse Córdova Montes

Seattle Journal for Social Justice

No abstract provided.

A Mass Disabling Event: Why California Courts Must Protect Workers’ Families From Take-Home Covid, Ellery Armstrong

Seattle Journal for Social Justice

No abstract provided.

Welcome To The Dollhouse: New Ai Technology Poses Ethical Issues In Prison Systems, Bailey Mccoy

Seattle Journal for Social Justice

No abstract provided.

Isolation, Purification, And Characterization Of Α-Galactosidase From Watermelon (Citrullus Lanatus), Christopher Henley Jr.

Chemistry & Biochemistry Undergraduate Honors Theses

The enzyme α-galactosidase is a type of glycosidase that removes galactose sugar units from larger molecules in cells. Compounds that inhibit glycosidases have been useful for understanding the structure and function of the enzymes they inhibit, and some have been used to treat certain diseases. Using inhibitors of α-galactosidase to study its characteristics and mechanisms may provide insights into its role in disease and its general utility. Advances in fields such as agriculture, sustainable fuels, and biomedicine may be facilitated by inhibition studies of α-galactosidase, but the current library of known inhibitors is relatively lacking. Obtaining α-galactosidase enzymes from chemical …

Design Of Aluminum-Air Battery Systems And Optimization Of Cetyltrimethylammonium Bromide And 8-Hydroxyquinoline Additives In Alkaline Electrolytes, Steve Chen

Chemical Engineering Undergraduate Honors Theses

The first portion of this thesis focuses on the design and component optimization of aluminum-air batteries to power a car for the Chem-E-Car competition. A range of separators, cathodes, and current collectors was evaluated to determine the optimal configuration for maximizing output. The resulting system consisted of 1000 series aluminum as the anode, cellulose separators saturated in 1 M potassium hydroxide as the electrolyte, and composite PVDF and graphite as the cathode. The improved batteries achieved a power density of 2.14 x 10^-4 W/cm² and were utilized for the Chem-E-Car competition. The second portion of the thesis investigates …

Electrochemical And Mechanical Evaluation Of Cellulose Acetate Electrolyte Films As A Function Of Polyetherimide And Polyethylene Glycol Additives For Supercapacitor Applications, Chase E. Golden

Chemical Engineering Undergraduate Honors Theses

Polymer electrolytes for supercapacitor applications require a balance between mechanical robustness and electrochemical performance. In this study, cellulose acetate (CA) films were modified with additives such as polyetherimide (PEI) and polyethylene glycol (PEG) to test how compositional changes influence mechanical performance, ionic conductivity, and electrochemical charge storage. Films were cast using phase inversion, soaked in a 1 M NaCl aqueous solution, and characterized using Fourier-transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and tensile testing. Films were also evaluated based on fluid uptake for insight into electrolyte retention.

Characterizations show that the addition of PEI increased ionic …

A Qualitative Study Of Maternal Morbidity And Mortality In The United States, Stacy D. Harris

Electronic Theses, Projects, and Dissertations

Maternal morbidity and mortality (MMM) in America are largely preventable. The aim is to analyze disparities found in women of color regarding MMM in America and evaluate: How does adequate maternal health care affect the morbidity and mortality disparities found in communities of disadvantaged mothers? This research will employ a qualitative analysis of mothers, a more specified age group, and region (West Coast) of the United States. Previous work neglected to obtain in-depth, first-hand interviews with mothers residing regionally in the United States from a specified age group. An interview guide will be used to conduct comprehensive interviews virtually. Expert …

Associations Between Water Intake, Dietary Quality, And Beverage Consumption Among University Students, Mohammad A. Qazi

Electronic Theses, Projects, and Dissertations

Title: Associations Between Water Intake, Dietary Quality, and Beverage Consumption Among University Students

Background and Aims: Sugar-sweetened beverage (SSB) and ultra-processed food (UPF) consumption significantly contribute to chronic disease risk and is often more common in underserved and racially/ethnically diverse communities. Drinking water is a low-cost, calorie-free behavior that may support healthier beverage and dietary patterns. Previous studies show that increased daily water consumption positively correlates with better diet quality and is inversely correlated with SSB and UPF consumption. This study aims to examine whether (1) increased daily water intake is associated with self-reported diet quality and (2) self-reported hydration …

Enrichment Of The Thermophilic Archaea Gearchaeales And Calditenuis In Lab Culture, Walter Saldivar

Electronic Theses, Projects, and Dissertations

Numerous microbes on Earth have yet to be grown in pure cultures and studied in the laboratory. Cultivation-independent genomic methods, such as metagenomics, can help us predict their metabolic capabilities, but cultivation remains valuable for testing these predictions. These uncultivated microbes are very diverse, especially within hot springs. Examples of these uncultivated microbes include the genus Calditenuis (formerly Aigarchaeota Group 1) and the order Gearchaeales; they are often abundant in terrestrial hot springs such as Great Boiling Springs (GBS) in Nevada. Previous work allowed for the establishment of laboratory enrichment cultures inoculated from sediments of GBS containing Calditenuis and …

The Feasibility Of Bison Production In Southern Illinois, Aidan Quinn

Research Papers

No abstract provided.

Maltreatment In Out-Of-Home Care: Former Foster Youths' Perspectives On Experiences And Investigation, Sarah Avila

Electronic Theses, Projects, and Dissertations

One of the tasks of the public child welfare system (PCWS) is to remove children from their home when abuse or neglect has occurred at a level that warrants removal. The PCWS places these children in licensed foster homes under the assumption that they will be safe and nurtured under the care of licensed foster caregivers. However, previous research have consistently shown that children experience ongoing maltreatment while in out-of-home care. This negligence is especially alarming when considering the United States’ rates of children in the foster care system. Despite the prevalence of this issue, little qualitative studies have been …

The Impact Of Adverse Childhood Experiences On Mental Health And Substance Use Among Black Foster Youth And Young Adults With Foster Care Experience, Jessica Davis, Leslie Del Pozo, Lorina Ramos-Delgado, Jarren Ho See

Electronic Theses, Projects, and Dissertations

Historically throughout the U.S, Black youth have been overrepresented in the foster care system and are more likely to experience high levels of Adverse Childhood Experiences (ACEs), racial discrimination, and frequent placement changes. Over time, these experiences can increase the risk of long-term mental health challenges and substance use. While research shows a strong link between ACEs and negative health outcomes in general, fewer studies focus specifically on ACES affecting Black foster youth or consider the role of culturally grounded resilience. This study examines how high ACE scores affect mental health and substance use among Black adolescents and young adults …

Assessing The Research Integrity At A Public University In California, Michael Lee Gillespie

Electronic Theses, Projects, and Dissertations

To investigate these issues, this study utilized a quantitative-dominant survey design supplemented by qualitative narratives. The sample included 61 tenured and tenure-track faculty from the College of Natural Sciences and the College of Social and Behavioral Sciences. The primary instrument was the Survey on Organizational Research Climate (SOuRCe), which assesses seven subscales of ethical health. Data were analyzed using Ordinary Least Squares (OLS) regression to determine if specific climate dimensions predict the acceptance of ethically ambiguous practices.

Findings revealed that while interpersonal relations and local norms (such as advisor-advisee relations) were rated highly, departmental socialization was the lowest-rated dimension, indicating …

Female Victimization In Intimate Partner Violence, Phileine Phan

Electronic Theses, Projects, and Dissertations

Intimate Partner Violence (IPV) is a widespread issue that disproportionately affects women, causing significant physical, psychological, and economic harm. Although research has explored IPV prevalence and risk factors, fewer studies address how race, socioeconomic status, sexual orientation, and disability intersect to shape women’s experiences and access to support. Generalizing survivors’ experiences often leads to overlooked services and policies for marginalized women. This study addresses that gap through a qualitative systematic review of peer-reviewed research on IPV victimization among women in the United States. A thematic analysis will be used to identify patterns related to systematic inequalities, help-seeking barriers, and the …

Impact Of Escitalopram On Postpartum Sleep/Wake Activity And Maternal Behaviors, Kimberly Guerrero Leon

Electronic Theses, Projects, and Dissertations

The postpartum period is characterized by profound physiological and psychological changes, including disruptions in sleep and activity patterns, which may contribute to the onset of postpartum depression. If left untreated, postpartum depression can result in long-term consequences, including cognitive impairments, emotional dysregulation, impaired maternal-infant attachment, and the onset of sleep-related disorders. Selective serotonin reuptake inhibitor (SSRI), escitalopram, is prescribed for the treatment of postpartum depression due to its efficacy, favorable safety profile, and relatively low cost. While escitalopram is considered an effective treatment for depression and anxiety, far less is known about its impact on maternal behaviors during the postpartum …

Trauma-Informed School Practices, Mental Health, And Academic Engagement Among High School Foster Youth, Ashley Avila, Vanessa Ramirez, Jaden Simmons

Electronic Theses, Projects, and Dissertations

Exposure to abuse, neglect, family separation, and violence can negatively affect foster youths’ well-being and their ability to succeed in school environments. Studies have shown that punitive disciplinary responses may contribute to retraumatization and school discouragement, while school settings are often one of the few stable environments in the lives of foster youth. Although trauma-informed school practices have been associated with improved school climate and student engagement, limited research has specifically examined how foster youths’ perceptions of these practices are associated with their mental well-being and academic engagement in high school settings. The purpose of this proposed study is to …

Nonbinary And Transgender Representation In Media: How Scripted Media Impacts And Shapes The Identities Of Communities Outside The Gender Binary, Makenna Dykstra

Electronic Theses, Projects, and Dissertations

The lack of, and otherwise poor, representation of nonbinary and trans communities contributes to the societal othering of these communities. However, nonbinary and trans representation holds importance to these communities. Trans and nonbinary communities, like other communities, use media to help them negotiate their identities (Hall, 2005). However, current representation in scripted television is small and contentious, with the ability to have just as much of a negative impact as a positive one. LGBTQ+ television has a history of favoring moderate depictions of queerness, like that in nonbinary and trans characters, as a means of defining these identities to cisgender …

We Define The Future: Lived Experiences Of Foster Youth In Higher Education And The Role Of The Educational Opportunity Program, Krystalyn T. Diaz

Electronic Theses, Projects, and Dissertations

Foster youth face significant barriers to higher education, including housing instability, financial insecurity, trauma, and limited adult support, contributing to low college completion rates, with only 3 to 11 percent earning a bachelor’s degree (Morton, 2018; Moyer & Goldberg, 2019). The Educational Opportunity Program (EOP), established in 1969 within the California State University system, was designed to reduce these barriers through counseling, mentoring, financial assistance, and basic needs support. However, limited research has centered the voices of foster youth to understand their experiences with these services. Guided by Maslow’s Hierarchy of Needs and Resilience Theory, this qualitative phenomenological study explored …

Effects Of Orexin/Hypocretin Receptor 1 Antagonist On Adult Drinking Behavior And Rest/Wake Activity After Adolescent Alcohol Consumption In Rats, Carolyn Cueto

Electronic Theses, Projects, and Dissertations

Adolescent alcohol consumption has been a growing concern in developing alcohol use disorders and alcohol-related sleep issues/disorders later in adulthood. The orexin system is involved in the homeostasis of sleep/wake cycles, feeding, drinking, and motivation. Alcohol consumption increases orexin neuron activity leading to high motivation and drug-seeking behavior for alcohol use and negatively impacting sleep. Ideally, inhibiting the orexin system could be a potential target for reducing consumption and motivation for alcohol use in adulthood as well as improving alcohol-related sleep issues. Previous work has shown that SB-334867, an orexin- 1 receptor (OX1R) antagonist, reduces ethanol-related behavior, but there is …

Suplexing Silence: A Media Analysis Of Sexual Misconduct In Pro Wrestling’S #Speakingout, Tommy W. Mccardle

Electronic Theses, Projects, and Dissertations

The 2020 #SpeakingOut movement marked a pivotal moment in professional wrestling, as survivors of sexual misconduct publicly challenged longstanding industry norms surrounding power, silence, and accountability. This study employs thematic analysis (Braun & Clarke, 2006) to examine how survivor narratives and organizational responses constructed competing meanings during the height of the movement between June 1 and August 31, 2020. Drawing from publicly available posts on X (formerly Twitter) and official company statements, the analysis explores how discourse functioned as a site of both resistance and institutional preservation. Inductive analysis of survivor narratives produced three primary themes: Abuse of Power, The …

Psychometric Properties Of The Interpersonal Style Questionnaire (Isq) And The Patterns Of Thinking Survey (Pots), Genevieve Allison

Electronic Theses and Dissertations

Self-regulation is a complex concept that includes multiple interacting factors, and it is studied across multiple fields of psychological research. Various theoretical models have been offered to explain this concept. Although models differ in their definitions of self-regulation, all consistently posit that it consists of emotional, behavioral, interpersonal, and cognitive domains. The current study examined the psychometric properties of two novel measures – 1) McVay and Stinson Interpersonal Style Questionnaire (ISQ) and 2) Stinson and McVay Patterns of Thinking Survey (POTS) – utilizing both a clinical and nonclinical sample. Results indicate that these measures are comprised of three factors across …

Understanding The Role Of Toxs As A Bile Sensing Component Of The Toxrs Virulence Regulatory System In Vibrio Spp., Minje Kim

Dartmouth College Ph.D Dissertations

Pathogenic Vibrio bacteria, such as V. cholerae and V. parahaemolyticus, colonize in the human small intestine to cause severe gastrointestinal disease. During the infection, these bacteria encounter bile salts, antimicrobial cholesterol metabolites secreted into the intestine. Pathogenic Vibrio species have evolved to utilize bile salts as signals to regulate virulence. The signaling depends in part on ToxRS, a conserved co-component transmembrane transcription regulator. ToxRS consists of the transcription factor ToxR and its membrane-tethered binding partner ToxS. ToxS is required for ToxR stability and full transcriptional activity. Although bile salts are known to influence ToxRS-dependent virulence gene expression, the molecular …