Digital Commons Network^™

An Experimental And Computational Study Of High-Temperature Creep Behavior In Fully Lamellar Titanium Aluminide Alloys, Karel M. Ziminsky

All Theses

Titanium aluminide alloys have seen increased aerospace applications in recent years, especially in aircraft jet engines. They can offer benefits such as improved high-temperature strength compared to titanium alloys and reduced density compared to nickel alloys. These alloys also can exhibit high creep resistance due to their fully lamellar microstructure. These mechanical properties are desirable for components like turbine blades, where tight tolerances must be maintained for optimal performance. This research examines the high-temperature creep behavior of a fully lamellar two-phase titanium aluminide alloy, TNM® (Ti-43.5Al-4Nb-1Mo-0.1B), through experimental and computational methods. Scanning electron microscopy studies reveal the presence of large …

Identification And Environmental Impact Of 35 Different Cut Flower Retail Packages In The U.S.A., Mary Kathryn Gillespie

All Theses

Cut flowers represent 35-billion dollars of global spending with 10-million dollars per day in the U.S.A; each transaction involving packaging. Across the country, cut flower packaging is inconsistently sized, laminated, colored, and unlikely to be recycled. 35 unique cut flower packages were collected across 16 different marketplaces, representing 88% of top grocery retailers. Measuring the materiality of the predominately unlabeled and inconsistent packaging collected required calorimetry equipment, such as Fourier-transform Infrared Spectroscopy, Differential Scanning Calorimeter, and precision gauges. Results unveil five materials representing the cut flower collection: Oriented Polypropylene (OPP), High-Density Polyethylene (HDPE), Paper, Polyethylene Terephthalate (PET), and Nonwoven Polypropylene …

Investigation Of Plm Utilities And Concepts In Engineering Curriculum: Challenges And Opportunities, Frederick Rowell

All Theses

The implementation of Product Lifecycle Management (PLM) tools and concepts in engineering education has gained increasing significance as manufacturing and engineering industry shifts towards digital engineering workflows to enhance collaboration, efficiency, and innovation. Despite its typical application in engineering industries, many mechanical engineering programs have not integrated PLM software into their curriculums. The Product Lifecycle Management Center (PLMC) at Clemson University offers PLM workshops and research opportunities to students. Despite these initiatives, PLM education remains largely extracurricular and is not fully incorporated into required coursework within the mechanical engineering curriculum. The objective of this thesis is to explore the role …

Tsunamigenesis On A Buoyant Granular Layer As A Model Of Ice Mélange In Ice-Choked Fjords, Nathan F. Reyner

All Theses

Glacial calving events can often create destructive tsunami waves in ice-choked fjords in the arctic region, posing a threat to local inhabitants and damaging coastlines. Here the sea is covered by a polydisperse granular material called ice mélange, whose properties can affect the wave characteristics. To investigate the role of a buoyant granular layer, as a model of ice mélange, on tsunami generation, or tsunamigenesis, a series of laboratory experiments were conducted by collapsing a column of dense granular material into a body of water with a layer of buoyant particles distributed across the liquid surface. Experiments were performed over …

Privacy Implications Of Data Collection In Android Automotive Os, Bulut Gözübüyük

All Theses

Modern vehicles have become sophisticated computational and sensor systems, as evidenced by advanced driver assistance systems (ADAS), in-car infotainment, and autonomous driving capabilities. They collect and process vast amounts of data through various onboard subsystems. One significant player in this landscape is Android Automotive OS (AAOS), which has been integrated into over 100 million vehicles and has become a dominant force in the in-vehicle infotainment (IVI) market. With this extensive data collection, privacy concerns have become increasingly crucial. The volume of data gathered by these systems raises questions about how this information is stored, used, and protected, making privacy a …

Fully Bio-Based, Flexible, Non-Isocyanate Polyurethane Foams With High Lignin Content For Protective Packaging Applications, Kathryn N. Evancho

All Theses

Polyurethane foam is a valuable material with applications across the automotive, packaging, construction, appliance, and furniture industries. However, traditional polyurethane foams are made from petroleum-based precursors including harmful isocyanates. Isocyanates are the leading cause of workplace asthma and are made from toxic phosgene gas, representing a challenge to green chemistry principles such reducing risk and environmental footprint. To address these concerns, non-isocyanate polyurethane (NIPU) foams have been the focus of research for the past decade, but they still face significant challenges in achieving commercial viability. NIPUs replace the traditional polyurethane reaction with a safer, non-isocyanate process most often employing cyclic …

Displacement And Dreams: The Loss Of Home In A New South Town, Dora Helen Impson

All Theses

Despite much research regarding the experience of white city dwellers of Greenville, South Carolina, in the twentieth century, telling the stories of the city’s Black neighborhoods still remains to be done. This thesis chronicles the Black neighborhood of Little Texas, which was found northeast of the city’s central business district from its inception in the 1870s to its demise in the 1970s. By situating the city’s efforts to restrict and limit Black spaces within the historical framework of nationwide efforts of residential segregation ordinances, racially restrictive covenants, and city planning, this thesis argues that Greenville followed many other cities in …

Novel Methods For Assessing And Prioritizing Road-Stream Crossings For Aquatic Organism Passage, Lesley E. Twiner

All Theses

Anthropogenic barriers such as dams and culverts have led to riverine habitat fragmentation and decreased fish diversity worldwide. Low-head structures such as culverts are far more abundant than large dams and may have a larger cumulative impact on river connectivity. Many efforts to inventory road crossing barriers and prioritize removal and restoration efforts do not consider temporal variation in flow. We used cameras to gain continuous water level monitoring data to quantify the relationship between precipitation events and outlet drop height. In the spring of 2024, we selected 25 culvert sites in upstate South Carolina and set up cameras to …

Industrialization And Immigration: Latino And Hispanic Immigrants In The South Carolina Upstate, Matthew D. Girardeau

All Theses

European investment in the South Carolina Upstate created favorable conditions for Latino immigration. French tire manufacturer Michelin came to the region in the 1970s, and the construction of the largest BMW plant in the world in the 1990s greatly impacted the local economy. The Upstate had a history of outside investment, beginning with Northern industrialists in the textile industry and later European companies that provided equipment for textile mills. The automotive industry did not necessarily employ Latinos, but the money generated by the sector created booming construction and service industries. Latinos built a community in western Greenville County and established …

Assessing The Viability Of A Proposed Third-Party Reusable Foodware System: An Environmental And Economic Comparison, Margaret Milani

All Theses

The United States generates 73 million tons of plastic waste annually, with over 6% attributed to the restaurant industry. The EPA recommends that restaurants reduce their plastic waste by transitioning to reusable foodware items. Previous studies have shown that using a single reusable foodware item, such as a cup, can result in lower environmental impacts and greater economic benefits compared to single-use plastic alternatives. However, the upfront costs of purchasing reusables, commercial dishwashers, and other associated expenses remain significant barriers for restaurants, leading many to continue using single-use plastic foodware. This study aims to analyze and compare the environmental impacts …

Healthy Dietary Patterns’ Impact On Depressive Symptoms: A Meta-Analysis Of Randomized Controlled Trials, Angela Encardone

All Theses

As the search for innovative mental health treatments expands, dietary interventions have emerged as a promising approach for alleviating depressive symptoms. This thesis presents a meta-analysis of randomized controlled trials (RCTs) examining the efficacy of whole-of-diet nutritional interventions in reducing depression symptoms among adults. Grounded in Bronfenbrenner’s Bioecological Model and Engel’s Biopsychosocial Model, this study explores the intersection of biological, psychological, and social factors that influence mental health outcomes. A systematic review identified six eligible RCTs assessing the impact of healthy dietary patterns, including the Mediterranean diet and other plant-based interventions, on depression symptoms. A random-effects meta-analysis revealed a significant …

Efficient Solvers And Anderson Acceleration For The Bingham Equations, Victoria L. Fisher

All Theses

This work studies two techniques utilized to solve the Bingham equations that model viscoplastic flow. An Uzawa-type iterative procedure is first analyzed and tested for poor convergence of velocity and stress. We apply Anderson acceleration (AA) to this method and show improved convergence rates for both velocity and stress. A solver utilizing regularization is introduced, and AA is also applied to display better convergence results. We propose a new method that combines these two solvers and applies Anderson acceleration.

Effects Of Common Herbicides On Organismal Interactions, Robert Chamberlin

All Theses

Pesticides are applied to agricultural lands to prevent undesirable weeds, animal pests, and fungi from harming crops and reducing crop yields. Pesticides are used in croplands at increasing rates around the world and have become an essential component of farming in recent decades. Often, rain, wind, and soil permeation move pesticides from farmlands to natural environments. Such contamination of natural environments by pesticides may threaten species by altering their behaviors, bodily functions, and the ways in which individuals interact. Atrazine and glyphosate are among the most widely used herbicides around the world and are useful in eliminating weeds, primarily in …

Conservation Agriculture Practice Effects On Greenhouse Gas Emissions From Fine-Textured Soils In Arkansas, Lauren Gwaltney

Graduate Theses and Dissertations

Biochar application and reduced tillage (RT) are both practices within the conservation agriculture framework, but specific impacts of these practices on direct greenhouse gas (GHG) emissions still require investigation in varied agricultural systems. This research aimed to evaluate the effects of biochar source (i.e., powder- and pellet-sized) and application rate (i.e., 0, 2.5, and 5 Mg ha^-1) on GHG production in simulated furrow-irrigated rice (Oryza sativa) in a greenhouse experiment, and to evaluate the effects of RT relative to conventional tillage (CT) on GHG production in soybean (Glycine max) in southeast Arkansas. Both studies …

Identifying Predictors Of Student Success During Occupational Therapy Level Ii Fieldwork, Melissa R. Foster

Graduate Theses and Dissertations

The training paradigm for new occupational therapy (OT) practitioners includes both didactic classroom learning and clinical fieldwork experiences in order for them to establish clinical competency. However, many students struggle with the theory-to-practice gap of translating classroom knowledge to clinical experiences. When students struggle in this manner, it causes stress for all stakeholders involved, including the fieldwork educator, clinic managers, OT program faculty, as well as the student.

This study aims to avoid this stress by identifying predictors of student success by analyzing data from recent graduates of the University of Arkansas/University of Arkansas for Medical Sciences OT program through …

Aircraft Routing And Crew Pairing Solutions: Robust Integrated Model Based On Multi-Agent Reinforcement Learning, Chengjin Ding, Yuzhen Guo, Jianlin Jiang, Wenbin Wei, Weiwei Wu

Faculty Research, Scholarly, and Creative Activity

Every year, airlines invest considerable resources in recovering from irregular operations caused by delays and disruptions to aircraft and crew. Consequently, the need to reschedule aircraft and crew to better address these problems has become pressing. The airline scheduling problem comprises two stages—that is, the Aircraft-Routing Problem (ARP) and the Crew-Pairing Problem (CPP). While the ARP and CPP have traditionally been solved sequentially, such an approach fails to capture their interdependencies, often compromising the robustness of aircraft and crew schedules in the face of disruptions. However, existing integrated ARP and CPP models often apply static rules for buffer time allocation, …

Diverse Residents' Experiences Of Policing And Attitudes Towards Law Enforcement: Findings From A Large Community-Based Survey In San José, California, Soma De Bourbon, Michael Dao, Melissa Mc Clure Fuller, William Armaline, Curtis Asplund, Rachel Kumar, Daniel Desanto, Jaala Robinson, Derrick Sanderlin, Miranda Worthen

Faculty Research, Scholarly, and Creative Activity

Despite widespread debate on public safety policy, few studies explore diverse community members’ perspectives on safety and policing. This community-based participatory research study assessed perspectives on city spending, opinions about law enforcement policy, perspectives on police and safety, direct experiences with police, and perspectives on alternatives to policing in San José, California, one of the ten largest cities in the United States. Between July 27, 2021 – January 14, 2022, we conducted an online survey, available in 7 languages, and obtained 1,595 responses. Respondents supported increased funding for community safety resources (73%) and helping residents meet basic needs (67%). A …

Fostering Educator Well-Being To Manage Job-Related Teacher Stress, Jennifer L. Ringelheim

Doctor of Education (Ed.D.)

The job-related expectations for effective classroom instruction expanded beyond teaching academics after the COVID-19 pandemic, which increased job-related teacher stress (Weisling, 2023). Using a convergent mixed-methods design, the researcher of this Improvement Science Dissertation in Practice (ISDiP) identified a problem of practice as the demands of teaching post-COVID-19 on teacher well-being. In Phase 1 of this ISDiP, the researcher conducted end-user consultations, reviewed existing data, completed a root cause analysis, and reviewed scholarly literature to develop a working theory of improvement to manage teacher stress with self-care and regulation strategies. Phase 2 of this ISDiP aimed to understand to what …

Leveraging Elementary Teachers' Social-Emotional Competencies Through Educational Neuroscience, Kara Sievel

Doctor of Education (Ed.D.)

Researchers posit that the adverse effects of COVID-19 on student well-being will extend far past its onset (Lane et al., 2024). Therefore, researchers and education policymakers have prioritized enhancing students’ social-emotional learning (SEL) due to its significant benefits for academic achievement and overall well-being (Greenberg & Abenavoli, 2017; Greenberg et al., 2017; Jones et al., 2019). However, an essential component of the equation - teachers’ social-emotional competencies (SECs) - continually fail to be considered (Donahue-Keegan et al., 2019; Herman et al., 2020; Odak et al., 2023). While educational leaders recognize effective SEL programs’ benefits for students, many seek guidance on …

The Grizzly, May 1, 2025, Kate Horan, Erin Ewing, Renee Washart, Claudia Tracy, Nathaniel Nerone, Sidney Belleroche, Adam Denn

Ursinus College Grizzly Newspaper, 1978 to Present

The Grizzly Takes On CoSA! • Senior Alumni Award Honorees • A Goodbye • And a Hello! • Repair Cafe • Hillel: A Home for Many • Ursinus College 2024-25 Crossword • Sports Stars Shine at URSPYS • Ursinus Softball Battles Through Ups and Downs

Epistemic Dysfunction In American Politics: The Impact Of Misinformation On Knowledge Acquisition., Megan Crowley

College of Arts & Sciences Senior Theses

Political misinformation has become an increasingly prominent topic of discussion among scholars across disciplines, particularly in the wake of the 2020 American presidential election. Despite growing scholarly interest in this phenomenon, however, contemporary research has yet to examine misinformation alongside traditional epistemological theory. This thesis aims to remedy this gap by synthesizing classical epistemology, journalism and media research, and political science to investigate the impact of misinformation on political knowledge acquisition. To accomplish this goal, the analysis will focus on the justification condition, conceptualized according to both internalist and externalist perspectives. The internalism section will cast misinformation as a form …

Antiproliferative Effects Of Salvia On Breast Cancers., Allison C. Portaro

College of Arts & Sciences Senior Theses

Breast cancer is the most common cancer diagnosed in female adults, with 2.3 million new cases worldwide in 2020. Plants have been used in traditional medicine and are a potential source of pharmaceuticals. One example is the large Lamiaceae (mint) family. The Salvia genus, commonly known as the sages, is the largest genus in Lamiaceae with almost 900 known species. Salvia lyrata (lyre-leaved sage) has a history of Native American medicinal use to treat cancers and other ailments resulting in this plant being referred to as ‘cancer weed.’ Extracts were produced from the leaves of S. lyrata, S. lyrata …

School Choice And Spatial Equity: A Comparative Analysis Of Public And Private K-12 School Enrollment In Three American Metropolitan Areas, John A. Schumacher

College of Arts & Sciences Senior Theses

This thesis investigates the factors influencing school choice and enrollment patterns in three Metropolitan Statistical Areas (MSAs): Detroit-Warren-Dearborn, MI; Louisville-Jefferson County, KY-IN; and Atlanta-Sandy Springs-Roswell. It explores the role of socioeconomic and spatial variables, including income levels, racial composition, and educational attainment, political fragmentation, and urbanicity in shaping enrollment decisions across public and private schools. Using spatial analysis and multiple regression techniques, the study examines how these factors contribute to variations in school enrollment within the selected MSAs. The results reveal that income level and racial composition significantly affect enrollment patterns while other factors such as urbanicity had minimal impact. …

The Effects Of Prenatal Cigarette Smoke Exposure On Developmental Milestones, Megan Jacobs

College of Arts & Sciences Senior Theses

In Kentucky, a reported 12.7% of mothers smoke cigarettes during pregnancy. Nicotine readily crosses the placental and blood-brain barriers, with fetal blood concentrations reaching 15% higher than maternal levels. By stimulating and desensitizing nicotinic acetylcholine receptors in the autonomic nervous system, nicotine disrupts uteroplacental blood flow, potentially altering fetal growth and development.

To investigate the effects of prenatal cigarette smoke exposure (CSE) on developmental milestones, C57Bl6 mice were exposed to either cigarette smoke (CSE, n = 30) or filtered room air (Sham, n = 20) for 3 hours daily from two days before mating until the day before birth. Offspring …

The Publics Of Hannah Arendt And Jürgen Habermas, Andrew Heggie

College of Arts & Sciences Senior Theses

Hannah Arendt’s and Jürgen Habermas’s accounts of the public are notable and important cornerstones in contemporary western political philosophy. This thesis will offer characterizations of Arendt’s account of the public realm in The Human Condition, and Habermas’s account of the public sphere in The Structural Transformation of The Public Realm, comparing and contrasting these accounts to each other in order to highlight the uniqueness of each account; as well the possible contemporary political relevance of these accounts.

A Qualitative Study On Recruiting And Retaining Black, Veteran, In-Service Teachers In Rural Tennessee K-12 Public Schools, Paul Andrew Mcmillan

Ed.D. Dissertations

The purpose of this qualitative, interpretive study was to explore the perceptions of Black, veteran, in-service teachers regarding recruitment and retention strategies in rural Tennessee K-12 public schools. This study addressed significant racial disparities in the Tennessee education system, where the percentage of Black teachers was notably lower than the percentage of Black students, particularly in rural schools. Data were collected from 20 Black, veteran, in-service teachers using questionnaires and semi-structured interviews to examine the factors influencing their decisions to seek employment and remain in rural districts. Analysis of the data identified three key themes related to Research Question 1 …

Chanticleer | May 2025, Jacksonville State University

Chanticleer

No abstract provided.

The Epidemic Of Ageism... The Rise Of Ageist Rhetoric In Potus, Annica Henry

COURI Symposium Posters

This paper explores the issue of ageism in the context of presidential politics in the United States. Defined as dismissive attitudes or actions toward individuals based on age, ageism affects younger and older individuals. Analyzing historical trends and societal expectations highlights how age norms for the executive branch are dictated by public perception and media narratives, which can often affect electoral outcomes. The study conducted in this paper examines societal norms and stereotypes that contribute to ageist perceptions and how this manifests in evaluations of presidential candidates. This paper discusses key research findings on the prevalence of ageism, including a …

How Graphene’S Berry Dipole Is Determined By Its Atomic Registry With A Substrate, Hannah K. Isbell

Physics Undergraduate Honors Theses

Since graphene’s discovery in 2004, it has been established as one of the most important materials in recent condensed matter history. Understanding its properties and potential uses has been the subject of intense scientific research around the world. Graphene’s unique physical properties allow it to serve a wide variety of purposes, from its everyday role in the formation of graphite in pencils to its more cutting-edge scientific functions in electronics and energy storage. Gaining a better understanding of graphene’s rich quantum landscape through geometric and topological phenomena, like Berry curvature and Berry dipole, could have significant implications for both theoretical …

A Mixed-Method Examination Of Social Media Influencers’ Source Characteristics In Sponsored Health Campaign Messaging: An Application Of Psychological Reactance Theory, Lauren Pick

Communication (PhD) Dissertations

Social media influencers (SMIs/influencers) are frequently used for marketing and public relations purposes (i.e., influencer marketing), but can be leveraged to avoid resistance to health campaign messages. Guided by psychological reactance theory (PRT), the purpose of this dissertation was to (a) uncover micro-influencer characteristics that mitigate reactance toward sponsored social media posts, (b) investigate whether influencers induce less reactance than non- influencers when disseminating sponsored health content, and (c) experimentally test whether influencer source characteristics mitigate reactance to sponsored health messaging. In Study One, focus groups with Gen Z Instagram users (N = 12) identified SMI use of controlling, “one …