Digital Commons Network^™

Development Of An Accelerated Life Testing Method For Reliability Assessment Of Wire Bonded Interconnects Subjected To Mechanical And Electromigratory Stresses, Whit Vinson

Graduate Theses and Dissertations

Power electronic advancement trends indicate that device power density will continue to increase as a result of increased power requirements and desired device form factor reduction in order to reduce weight and material costs and increase ease of integration into next-generation power systems. With these advancements come concerns regarding device reliability. The compounded effects of increased power density and form factor reduction in electrical conductors will yield amplified joule heating effects in addition to the already increasing device temperature profiles resulting from the incorporation of wide bandgap technology into power systems. Joule heating effects can lead to a variety of …

A Full Universal Basic Income For The United States, Kevin Rogers

Graduate Theses and Dissertations

The objective of this dissertation is to estimate whether a "full" Universal Basic Income (FUBI), within or without a single-payer Universal Health Care (UHC) system, would be both sufficient to eliminate income poverty and affordable without increasing federal borrowing or decreasing federal discretionary spending in the United States.

In Chapter 1, I elaborate on the components and benefits of a FUBI. In Chapters 2 and 3, I present the results from a static, behavioral, partial-equilibrium, micro-simulation model that analyzes household responses to changes in mandatory spending, sources of tax revenues, and tax expenditures. These changes include introducing a FUBI in …

Studying Acetylation Of Aconitase Isozymes By Genetic Code Expansion, Jessica Araujo

Graduate Theses and Dissertations

The tricarboxylic acid (TCA) cycle is a very important, centrally located, energy-producing pathway that connects numerous other metabolic and regulatory pathways. Enzymes of this cycle have been more recently implicated in various cancers and neurometabolic disorders, however, the exact mechanism by which this happens becomes quite complex when considering the potential modification of these enzymes and the presence of multiple forms of the enzymes and therefore there is much to be studied in this area.

Aconitase has become a recent enzyme of interest as its substrate, citrate, has been found to play a major role in many vital processes within …

Improving Gifted And Talented Education In Arkansas: Identification, Academic Benefits, And Local Norms, Bich Thi Ngoc Tran

Graduate Theses and Dissertations

In the United States, education policies differ from state to state. Local research, therefore, is important to inform educators, policymakers, and researchers on the ground. This dissertation leverages ten years of administrative data to study three questions about gifted and talented (G/T) identification and education in Arkansas: does the current system identify the right students? Are gifted and talented programs beneficial for students? And, how can we improve diversity in gifted and talented education? Leveraging logistic regression, mixed-effects models, and descriptive statistics, I sought to provide answers to these three questions. First, are academically ready students from low-income families being …

Hallucinogenic Neoshamanism As Antimodernism: Development And Ethical Considerations, Ethan Thompson

Graduate Theses and Dissertations

Humans have been using hallucinogenic plants and fungi for thousands of years. Historically, people around the world have made use of these substances to aid in their spiritual development. Studies of the usage of hallucinogens in indigenous societies often use the term “shamanism” to characterize the associated system of belief and ritual practices. In popular understanding, shamanism is a religious system that features highly ritualized performances in which a practitioner (shaman) utilizes an altered state of consciousness to gain access to realms inhabited by spirits with the intent of recruiting their help to resolve a problem, cure a patient, correct …

Something Like A Phenomenon: High Achieving Women Of Color And Experiences Of Mental Health Resource Utilization, Andrea Hampton Hall

Graduate Theses and Dissertations

The purpose of this study was to examine, explore, and understand the lived experiences of high-achieving Black and Latina women who had utilized mental health services in the last 18 months. The impact of discrimination and stigma is present today and may manifest itself within communities of color when these individuals attempt to access mental health services. The counseling field and counselor education programs are ethically responsible for integrating social justice counseling into coursework and practice. This informs educators and counselors of barriers that may influence and impact best practices for providing mental health services to communities of color. A …

Public Libraries In Rural Arkansas: An Oasis In An Information Desert, Britt Graves

Graduate Theses and Dissertations

Public libraries in Arkansas are welcome, but those found in rural Arkansas are almost a necessity. The public uses the library for more than just checking out books or their email: it’s become a community gathering place for all walks of life, regardless of age or economic status. When the Covid-19 pandemic hit the state, libraries also became essential for education, medicine, news, and employment, nearly overloading their resources and shining a spotlight on technology, or the lack thereof, that so many public libraries are needing. With the Arkansas governor planning an upgrade on broadband technology and the federal government …

The Experiences Of The Transgender And Gender Diverse Community On Coming Out At The University Of Arkansas, Taylor Hubbard

Graduate Theses and Dissertations

Researching the experiences of the TGD community can help better understand the unique struggles this community may face, specifically regarding the unique experiences southeastern United States TGD individuals have encountered. We draw on previous studies regarding the entire LGBTQ+ community and the minimal research on the TGD community. There is minimal research looking specifically at the experiences college TGD students have when coming out in different aspects and the perceptions TGD individuals have about themselves as a result of their experiences coming out. We conducted a survey with 37 respondents as well as 4 qualitative interviews. We present interviews conducted …

Economic Disadvantage, Nativity, And Academic Performance And School Punishment Among Latino/A Children, Yolanda Chavez

Graduate Theses and Dissertations

Cultural explanations of how familial resource inequality negatively impacts the academic well-being of a Latino/a child saturate the literature. This study examines the relationship between economic disadvantage and academic performance and school punishment through Family Stress Process Theory, providing a contextual analysis of resource instability. The additional myriad of legal and social constraints that parental nativity provides for family members can moderate this relationship. Data was drawn from the Fragile Families and Child Wellbeing Study, a longitudinal measure of U.S. couples and their children in 20 large U.S. cities. Regression models indicate the relationship between economic disadvantage and academic performance …

Factors Contributing To Barriers To Equity In Gifted And Talented Identification, Adam Grant Lamparske

Graduate Theses and Dissertations

The purpose of this study was to examine the existing barriers to equity in the identification and servicing of gifted students in a small mid-western suburban school district. A mixed method approach guided by constructivist philosophy was used to conduct this research. An inductive Grounded Theory was the methodological approach. This study sought to gather the perception of school district stakeholders to identify potential barriers that exist for specific subgroups of students to being identified for gifted and talented services. The research questions for this Problem of Practice were as follows: (1) How do teachers and parents in School District …

Representative Government: An Evaluation Of Single-Party Dominance In The State Of Arkansas, Kennedy Lynn Hill

Graduate Theses and Dissertations

Studying the opinion-policy link in the state of Arkansas can determine if the state has had a representative governing body. The state, like many others, has a history of single-party dominance politics, and this study seeks to understand the conditions for policy congruence under one-party rule. Specifically, this research focuses on the past two decades of Arkansas politics, wherein the state’s legislature experienced a partisan shift from the Democratic Party to the eventual single-party dominance of the Republicans. Using data from the Arkansas Poll and the Arkansas State Legislature to analyze multivariate OLS regression models, this study investigates factors that …

Law Enforcement Policy And Personnel Responses To Terrorism: Do Prior Attacks Predict Current Preparedness?, Bryce Kirk

Graduate Theses and Dissertations

Terrorism has been on the mind of the American people and politicians alike since the 9/11 attacks over two decades ago. In the years since, there has been a massive shift in law enforcement priorities from community-oriented policing (COP) to homeland security-oriented policing. This was especially evident in the establishment of the Department of Homeland Security (DHS) shortly after the attacks on the World Trade Center and Pentagon in 2001, which was established to aid law enforcement entities with terrorism preparedness. While prior literature has addressed a variety of factors that have contributed to terrorism preparedness, very little research has …

An Epidemic Of Skepticism: Examining Right-Wing Populist Responses To The Covid-19 Crisis In Germany, Rachel Moline

Graduate Theses and Dissertations

This thesis examines the role of far-right populist groups in the framing of global health crises. To understand the impact far-right populism has had on the response to health crises, I will be analyzing the case of the Alternativ für Deutschland (AfD), or Alternative for Germany, and their response to the ongoing coronavirus pandemic. I evaluate three distinct time periods in the AfD’s history and determine how the AfD has framed and reframed its crisis narrative in response to the coronavirus compared to previous crises, such as the refugee crisis of 2015. I hypothesize that new crises will lead far-right …

Predictors Of Peak Elbow Valgus Torque In Collegiate Baseball Pitchers, Adam Richard Nebel

Graduate Theses and Dissertations

Context: The incidence of UCL tears in baseball is at an all-time high. ATs are in the position to identify those at risk and potentially prevent injury to the UCL. In baseball, research has associated elbow valgus torque as a potential predictor of injury risk. However, markerless analysis has not assessed possible predictors of injury to the UCL in baseball players. Objective: Identify the kinematic factors that influence peak elbow valgus torque through the sequence of a fastball pitch. Design: Cross-sectional study. Setting: Field study performed in university’s pitching development center. Participants: Division 1 collegiate baseball pitchers (N=21; 17RHP, 4LHP; …

Arkansas Fresh-Market Blackberries: Identifying Unique Attributes And Harvest Practices That Impact Marketability, Andrea Lea Myers

Graduate Theses and Dissertations

Fresh-market blackberries (Rubus subgenus Rubus) are sold worldwide and have attributes that appeal to consumers. The delicate-nature of the fruit requires hand harvesting, and minimal handling of the fruit postharvest. Objectives of this research on Arkansas fresh-market blackberries was to 1) identify the unique attributes 2) determine the best handling practices to increase postharvest quality, and 3) evaluate the potential of soft robotic gripper for harvesting. For the first objective, blackberry genotypes were harvested from the University of Arkansas System (UA System) Division of Agriculture Fruit Research Station in Clarksville, AR. Nineteen genotypes were harvested in 2020, eight genotypes were …

High Power Density And High Efficiency Converter Topologies For Renewable Energy Conversion And Ev Applications, Dereje Lemma Woldegiorgis

Graduate Theses and Dissertations

This dissertation work presents two novel converter topologies (a three-level ANPC inverter utilizing hybrid Si/SiC switches and an Asymmetric Alternate Arm Converter (AAAC) topology) that are suitable for high efficiency and high-power density energy conversion systems. The operation principle, modulation, and control strategy of these newly introduced converter topologies are presented in detail supported by simulation and experimental results. A thorough design optimization of these converter topologies (Si/SiC current rating ratio optimization and gate control strategies for the three-level ANPC inverter topology and component sizing for the asymmetric alternate arm converter topology) are also presented.

Performance comparison of the proposed …

Children’S Social Judgments Of Others On The Basis Of Dialect-Specific Vocabulary, Madison Myers-Burg

Graduate Theses and Dissertations

Many studies suggest that young children prefer speakers who speak similarly to them. Children demonstrate social preferences for speakers of their own native language over speakers of a non-native language as well as for speakers of a familiar accent over speakers of an unfamiliar accent. Recent research suggests that young children will similarly show preference for speakers who use familiar dialect-specific vocabulary over speakers who use vocabulary specific to an unfamiliar dialect. The current study investigated potential motivations behind young children’s preferences for familiar dialect-specific vocabulary. Fifty participants ages fifty-one months to ninety-five months (Mage =72.6 months) viewed an animated …

Exploring Higher Weight Women's Experiences Of Provider Weight Stigma, Meredith W. Moore

Graduate Theses and Dissertations

The purpose of this phenomenological study is to explore the phenomena of weight stigma as experienced by higher weight women in mental health treatment who also engage in restrictive eating behaviors. Women in larger bodies who are emotionally or behaviorally restrictive in their eating behaviors face a unique set of challenges and barriers. These include challenges due the disordered eating behaviors themselves, along with barriers related to weight stigma perpetuated by the mental health providers treating them (Harrop, 2019). Distinct hurdles to proper treatment including delay of diagnosis, longer duration of symptoms, and increased distress related to eating and body …

The Valiant Woman, Ann Louise Cole

Graduate Theses and Dissertations

In 1600, Hosokawa Tama Gracia perished under mysterious circumstances. She was a noblewoman married to a powerful daimyo, the daughter of a traitor, and a Kirishitan convert during the “Christian Century” in Japan. In life, she was both dutifully subservient and tenaciously bold. In death, she was fodder for propaganda, and in the hands of European writers her life story was re-written for specific narrative purposes. The most striking of these artistic transformations is her depiction as a Christian martyr in the late seventeenth-century Latin Jesuit drama Mulier fortis. The music for this drama was composed by Johann Bernhard Staudt …

Effects Of Cognitive Style On Food Perception And Eating Behavior, Thadeus Lyndon Beekman

Graduate Theses and Dissertations

Within the fields of psychology, notably cultural psychology, the analytic-holistic cognitive style theory has been introduced, developed, fine-tuned, and validated across a wide range of situations, stimuli, and populations. This research, combined with recent applications of the analytic-holistic theory, suggests that the differences in analytic or holistic tendencies of individuals in food, sensory, and consumer tests can impact food perception and associated behaviors. This dissertation aimed to investigate the impact of analytic-holistic cognitive styles of consumers in food situations. The first objective to accomplish this goal was to conduct exploratory research to identify if and where the analytic-holistic theory may …

Teaching Programmable Microcontrollers To Novice Users In A College Of Agriculture: Effects On Attitude, Self-Efficacy, And Knowledge, Grant T. Hood

Graduate Theses and Dissertations

This thesis consists of two articles that examined an instructional treatment based on the use of Arduino UNO R3 programmable microcontrollers in a fundamentals of agriculture systems technology course at the University of Arkansas. The first article examined students’ breadboarding and programming self-efficacy and knowledge of Arduino. The treatment consisted of a three-class-period instructional treatment, starting with a pretest before instruction to measure students’ baseline interest, knowledge, and self-efficacy of breadboarding and programming Arduino. This was followed with a short 30-minute instructional video explaining basic Arduino programming and breadboarding. Next a hands-on laboratory activity requiring students to breadboard and program …

Managing Stress Tolerance On Warm-Season Putting Greens In The Transition Zone, Thomas Edward Walton

Graduate Theses and Dissertations

The use of warm-season putting greens in the transition zone has increased in recent years. Ultradwarf bermudagrass (Cynodon dactylon (L.) Pers x C. transvaalensis Burtt-Davy) is the most prevalent warm-season putting green selection in the transition zone, however, newly developed greens-type zoysiagrass (Zoysia spp.) cultivars represent another potential selection for golf courses. The two major limitations of warm-season grasses in the transition zone are a general lack of cold- and shade-tolerance. Protective covers are essential to protect ultradwarf bermudagrass putting greens in the winter months. Unfortunately, golf courses can still experience winterkill underneath protective covers. Two field trials were conducted …

Predicting The Likelihood And Scale Of Wildfires In California Using Meteorological And Vegetation Data, Matthew Walters

Graduate Theses and Dissertations

Wildfires have devastating ecological, environmental, economical, and public health impacts through the deterioration of water and air quality, CO2 emissions, property damage, and lung illnesses. The early detection and prevention of wildfires allow for the minimization of these risks. The use of Artificial Intelligence (AI) in wildfire detection and prediction has been highly researched as a tool to assist firefighters in stopping wildfires in its early stages. The three common wildfire prediction categories include image and video detection, behavior prediction, and susceptibility prediction. Data such as climate, weather, vegetation, satellite images, and historical wildfire data is most commonly used. Many …

The Impact Of Reliability In Conceptual Design - An Integrated Trade-Off Analysis, Tevari James Barker

Graduate Theses and Dissertations

Research presented in this paper focuses on developing models to estimate the systemreliability of Unmanned Ground Vehicles using knowledge and data from similar systems. Traditional reliability approaches often require detailed knowledge of a system and are used in later design stages as well as development, operational test and evaluation, and operations. The critical role of reliability and its impact on acquisition program performance, cost, and schedule motivate the need for improved system reliability models in the early design stages. Reliability is often a stand-alone requirement and not fully included in performance and life cycle cost models. This research seeks to …

Present Limitations And Future Projections: Food Insecurity, Housing Insecurity And Optimism Among College Students, Amber Obermaier

Graduate Theses and Dissertations

Within the last decade, research has identified wide-ranging disparities in access to basic needs among university students. These differences, such as a lack of adequate food and housing during university, provide a negative environmental experience with potential to limit one’s optimism or hope for the future. This research explores how basic needs insecurity and social vulnerabilities among college students are related to subjective assessments of their prospects for the future. The present study utilizes survey data from a random sample of college students (n=300) enrolled at an urban university in the Midwest region of the United States of America. Logistic …

Voluntary Contacts With Police: Do Differences In Perceptions Of Police Still Exist?, Regan Harper

Graduate Theses and Dissertations

Publicized police misconduct and brutality over the past decade have contributed to increased tensions between the police and community. Exposure to these encounters can result in negative perceptions of police and have serious policy implications for funding of police departments. Although prior research has focused on previous contacts with police, little is known about how voluntary contacts with police can shape an individual’s perceptions. Given the recent death of George Floyd and movement to “defund the police,” the current study aims to determine whether there are demographic differences in perceptions of police among those who have experienced prior voluntary contacts …

Macronutrient Availability Shapes Host Response To Infection And Feeding Behavior, Weston Gerald Perrine

Graduate Theses and Dissertations

Macronutrients in the diet are vital to the physiological processes necessary for an organism to effectively clear a pathogen. Diet can be important to a host’s susceptibility to infection and severity of pathology, though results can vary across host-pathogen systems (Sen et al. 2016). Manipulating the ratio of specific macronutrients in the diet is an effective method to begin understanding how individual macronutrients, rather than food types, have on immune responses. Using an avian host-pathogen system, I explored the effects of dietary macronutrient composition, specifically lipid and protein content, on disease pathology and behavior of canaries (Serinus canaria) infected with …

Teaching For Career Success: An Agricultural Industry Perspective Of Preparedness Needs For Diverse Workforce Development, Madelaine Giebler

Graduate Theses and Dissertations

This research examined agricultural graduate preparedness needs through the lens of agricultural industry professionals. In the rapidly changing industry environment, continual review of agricultural curriculum needs provides relevant curriculum recommendations for academic programs. This study came at a time when agricultural curriculum was in need of review. Methodology for this study involved a qualitative mixed methods approach employing survey and interview responses. A total of 121 industry professionals, identified through the University of Arkansas Bumpers College Career Development Center, were contacted with the survey link. A total of eighteen individuals completed the surveys, and of those eighteen survey respondents, eight …

Variations In Consumer Rejection Thresholds Of Water Samples Including Mixed-Berries Flavors, Kathryn Mccullough

Graduate Theses and Dissertations

Functional flavored water has emerged as a major space in the beverage industry in recent years. However, no research has explored the point that consumers begin to reject a specific flavor concentration within a flavored water matrix (i.e., a consumer rejection threshold). The first part of this thesis aimed to determine the consumer rejection thresholds of mixed-berry flavors in both sweetened and unsweetened water samples and examine the effects of demographics, food neophobia status, and personality traits on the consumer rejection thresholds. The second part of this thesis aimed to distinguish and compare consumer rejection threshold methodologies with and without …

Rural Students On College Enrollment: Perceptions Of Influence Surrounding College Choice, Lucas M. Simmons

Graduate Theses and Dissertations

The purpose for conducting the study was to describe the community, personal experiences, and life events of individuals from rural Arkansas communities in developing their decisions to attend college and how the community impacted their successful enrollment at the University of Arkansas. Specifically, the study set out to explore how rural communities were perceived to influence college enrollment decisions and choices in degree selection. Although situated at one case study institution, the University of Arkansas, the findings have importance for all rural students and communities, and ultimately public policy and institutional behaviors. Therefore, the purpose for conducting the study was …