Digital Commons Network^™

Exploring The Lived Experiences Of Second-Career Educators, Kyle Avink

Dissertations

School districts across the United States face a persistent teacher shortage driven by high attrition rates, declining enrollment in teacher preparation programs, and increasing demands on educators (Carver-Thomas & Darling-Hammond, 2017). Teacher attrition is especially high within the first three to five years, with nearly 40-50% of new teachers exiting within their first five years (Carver-Thomas & Darling-Hammond, 2017; Cells et al., 2023; Gray et al., 2015; Ingersoll et al., 2025). In response, many states have expanded alternative certification pathways that allow professionals from other fields to enter teaching, making second-career educators a potential solution to workforce challenges (Afacan, 2022; …

Exploration Of Expressive Prosody During Dyadic Conversation In Adults With Dementia, Kara Marie Sabanski

Undergraduate Honors Thesis Collection

Dementia is associated with progressive cognitive and communicative impairments that can contribute to social withdrawal and reduced quality of life. Although prior research has explored musical interventions and the use of prosodic features for early diagnosis, little is known about how expressive prosody is linked to engagement and communicative state during dyadic conversation in individuals with dementia. The present study examines different speech characteristics present in expressive prosody during conversation and explores whether these characteristics are associated with differences in conversational and behavioral engagement. Acoustic measures of pitch and speaking rate were analyzed during conversational interactions. Results indicated that prosodic …

Affective Perception Of Color In Classroom Design, Emmalyn Burns

Interior Design Undergraduate Honors Theses

The physical environment of a classroom plays a crucial role in shaping how students learn, engage, and interact with their education. This study focuses on color’s influence on well-being, focus, and overall academic experience. Many higher education classrooms still rely on a standard that implements neutral colors, which does not always align with student preferences. While prior research has shown that color can have measurable cognitive and emotional effects, its thoughtful application in university settings remains limited. Current architectural design processes often overlook ongoing user-based feedback past the pre-design phase, leaving students without input on the decisions for their learning …

Organizational Theory And Nurse Burnout: A Secondary Data Analysis Before And After Covid-19, Bridget Webb, Jennifer Mallow, Suzy Mascaro Walter, Kesheng Wang, Tina Antill Keener, Tim Cunningham

Creating Healthy Work Environments (CHWE)

Background: Nurse burnout is a global health priority that has been compounded by Coronavirus 2019 (COVID-19). Organizational theory states that nurse burnout is directly impacted by operant mechanisms (nurse characteristics, nurse specialization) and hospital-wide models. The purpose of this study is to determine the relationship between hospital wide models (evidence-based care, team-based care, discharge planning, care coordination), operant mechanisms (nurse characteristics and specialization), and outcomes (nurse burnout) before and after COVID-19.

Design: A cross-sectional design was applied, using secondary data analysis.

Methods: A secondary data analysis using the 2018 and 2022 NSSRN data set was used to …

Blue Waves And Razor Blades: For Large Jazz Ensemble / Big Band, Mikel Shane Prather

Graduate Thesis Collection

The concept and main theme of Blue Waves and Razor Blades originally began in 2014 when I was a young composer attending Butler University for my master’s degree in composition. The idea of the piece was to use flow and motion based upon my imagining of an ocean wave crashing into the bank, sometimes moving past rocks and barriers causing slight tension. The theme and the beginning structure was created and originally titled Blue Waves. Before I could really focus on this piece, opportunities arose in Los Angeles where I started my current career in the music film industry and …

A Rare Convergence: Malignant Thymoma With Pericardial Invasion In A Brca2 Mutation Carrier With A Synchronous Breast Mass, Mahmoud Yacout, Mohammad Chisti

Conference Presentation Abstracts

Introduction Thymomas are rare epithelial tumors of the anterior mediastinum, accounting for < 1% of adult malignancies, with an estimated annual incidence of approximately 0.15 cases per 100,000 persons. Although often indolent, thymomas are malignant by definition and may invade locally, recur, and, less commonly, disseminate. They are classically associated with autoimmune conditions, most notably myasthenia gravis, yet their relationship with hereditary cancer syndromes remains poorly defined. Germline BRCA2 mutations are well established in the pathogenesis of breast, ovarian, pancreatic, prostate, and other malignancies through impaired homologous recombination DNA repair. However, an association between BRCA2 mutations and thymic epithelial tumors has rarely been reported. We describe an unusual case of invasive malignant thymoma with pericardial invasion in a BRCA2 mutation carrier, discovered concurrently with a synchronous FDG-avid breast mass suspicious for malignancy. Case Presentation An 85-year-old man with a history of CAD, hypertension, GERD, and prior radical prostatectomy presented with several months of unintentional weight loss and chronic diarrhea. During evaluation for recurrent appendicitis, imaging incidentally revealed a large anterior mediastinal mass measuring up to 7.9 cm with irregular margins. FDG-PET demonstrated moderate metabolic activity within the mass (SUVmax 3.8). CT-guided biopsy revealed a thymic epithelial neoplasm consistent with thymoma. There was no clinical evidence of myasthenia gravis. He subsequently underwent partial sternotomy with thymectomy. Pathology demonstrated a 6-cm type B2 thymoma with direct pericardial invasion, positive surgical margins (R1), and no regional lymph node involvement (pN0), consistent with pT2 stage III disease by the Masaoka–Koga system. Given high-risk features, adjuvant radiation therapy was initiated, with planned surveillance using PET imaging and circulating tumor DNA monitoring. Concurrent PET imaging identified a palpable FDG-avid right breast mass. Genetic testing revealed a pathogenic germline BRCA2 mutation. The breast lesion is currently undergoing diagnostic biopsy and surgical evaluation. Discussion Thymomas are malignant neoplasms with a predilection for local invasion. Type B2 thymomas carry a higher risk of recurrence, particularly in the presence of pericardial invasion or incomplete resection. Complete surgical excision remains the cornerstone of management, while postoperative radiotherapy is recommended in invasive or R1 disease to reduce locoregional recurrence. The coexistence of invasive thymoma and a germline BRCA2 mutation is exceedingly rare and raises questions regarding shared oncogenic mechanisms. While thymic epithelial tumors are not classically associated with BRCA mutations, DNA repair defects may contribute to tumorigenesis in rare malignancies. The presence of a synchronous FDG-avid breast mass in a male BRCA2 carrier further underscores the importance of comprehensive oncologic and genetic evaluation and highlights the need for multidisciplinary management in complex hereditary cancer presentations. Conclusion We report a rare case of malignant type B2 thymoma with pericardial invasion in a BRCA2 mutation carrier, identified alongside a synchronous breast mass suspicious for malignancy. This case highlights the potential intersection between thymic epithelial tumors and hereditary cancer syndromes, reinforces the importance of genetic evaluation in patients with multiple malignancies, and underscores the need for long‑term multidisciplinary surveillance. Further investigation is warranted to elucidate any causal relationship between BRCA‑mediated DNA repair dysfunction and thymoma development.

Efficient Compression Framework For Time Series Self-Supervised Learning, Brooklyn Berry

Theses and Dissertations

Time series data is perhaps one of the most broad data types that exist and is studied by diverse research fields. Recently, Self-Supervised Learning (SSL) training frameworks, the training frameworks to pre-train deep learning models without human annotations, have been proposed. Because human annotation for time series is typically associated with being costly, there is a growing interest in developing effective SSL for time series data. In SSL, the pre-trained model will often produce a time series embedding series summarized from the original time series to ensure temporal information is preserved. Although such representation can effectively capture the semantic information, …

Exploring Online Social Capital Through The Lived-Experiences Of Students At A Southern Hispanic Institution: A Transactional Distance Approach, Marc Anthony Zamorano

Theses and Dissertations

This qualitative transcendental phenomenological study examines how first generation Hispanic doctoral students at a southern Hispanic Serving Institution experience online engagement as a context for generating bonding, bridging, and linking social capital. Semi structured-in-depth interviews with 17 participants explored interactions with instructors, peers, course content, and technology. Analysis followed phenomenological reduction procedures to identify the essence of participants lived experiences. Key findings revealed that instructor presence and responsiveness strengthened bonding and linking capital; peer collaboration fostered belonging and bridging capital; and technology mediated tools reduced transactional distance when paired with clear course design and timely feedback. These relational and technological …

Empowering Latinas In Computer Science: Success Stories And Challenges, Martin Jalomo

Theses and Dissertations

Latina women remain significantly underrepresented in computer science, and limited research centers their lived experiences within the field. This qualitative narrative inquiry examined how Latina women who completed computer science degrees and secured employment persisted in predominantly male and non-Latina environments. Guided by Yosso’s (2005) Community Cultural Wealth framework, the study explored how participants leveraged forms of capital to navigate structural, relational, and psychological barriers. Data were collected through narrative interviews with five Latina graduates and analyzed using thematic and cross-case analysis. Findings indicate that underrepresentation shaped participants’ sense of belonging while persistence was supported through aspirational, familial, social, navigational, …

“Sometimes I Feel That Going To College Was A Waste Of Time”: Latinas’ Lived Experiences Navigating Culture, Gender, And Marriage Post-College Degree, Nancy Peña

Theses and Dissertations

This qualitative critical narrative study explores how Latinas navigate and make meaning of gender roles within their heterosexual marriages post-college graduation. Data are collected via semi-structured interviews with 10 Latina participants: an initial plática focus group, followed by individual interviews, and a final plática focus group for member checking. Key findings reveal that despite Latinas acquiring autonomy, stability, negotiated power, personal growth, and social development as a result of attaining a degree in higher education, overall development is limited due to heightened responsibilities, persistent gender hierarchies, continuous religious norms, and constant gender role guilt. The evidence suggests that although attaining …

Skills, Challenges, And Career Outcomes: A Quantitative Study Of Early-Career Experiences In Research Administration, Jennifer Juliet Martinez

Theses and Dissertations

Research administration as a field lacks clearly defined entry pathways, with many professionals entering through indirect routes. These conditions contribute to variation in early-career experiences and may influence long-term outcomes. The purpose of this study was to examine how entry pathways and skills at entry relate to early-career challenges in research administration, and how those challenges are associated with career dissatisfaction.

This study used a quantitative, cross-sectional design. Data were drawn from the U.S. subset of the Research Administration as a Profession (RAAAP-3) survey. Key variables included entry pathways, skills at entry, early-career challenges, and career dissatisfaction. Findings indicate that …

The Relationship Between Secondary School Principals’ Ethical Leadership Behaviors And School Climate, Ericka Julie Carranza

Theses and Dissertations

Limited research explains how teachers in culturally and socioeconomically diverse secondary school settings experience principals’ ethical leadership behaviors and how those behaviors are perceived as shaping school climate. This qualitative study examined teachers’ perceptions of secondary school principals’ ethical leadership behaviors and the ways in which those behaviors were experienced as influencing relational, emotional, and professional dimensions of school climate.

Grounded in Social Learning Theory, the study employed a qualitative research design using semi-structured interviews and focus groups with secondary school teachers from diverse educational contexts. Data were analyzed using thematic analysis to identify patterns related to ethical leadership behaviors, …

Data Driven Monitoring And Control Of Laser Powder Bed Fusion Process, Jose De Jesus Galarza

Theses and Dissertations

The Laser Powder Bed Fusion Process (LPBF) has been one of the main processes of additive manufacturing, enabling the manufacturing of complex geometries, customization, and lightweight parts. Modern LPBF processes have integrated monitoring systems that capture the light emissions per layer for quality assurance. However, standard defect detection algorithms have not yet achieved the high precision required due to the inherently variable nature of the signal, insufficient data for model training, and the confounding effects of the print.

The processes still have some challenges, such as characterizing the roughness from the build parameters alone, improving the pore detection using the …

Typing Proficiency And Its Relationship To Outcomes In Online Writing Assessments, Agustin J. Cantu

Theses and Dissertations

As writing assessment increasingly occurs in digital environments, students must demonstrate not only composition skills but also sufficient transcription fluency to produce responses under timed conditions. This quantitative study examined the relationship among structured typing practice, transcription fluency, and writing performance among students in Grades 3 and 4 at IDEA Public Schools. Specifically, the study investigated whether engagement with Typing.com was associated with improvements in words per minute (WPM) and accuracy, and whether transcription fluency was associated with performance on Internal Assessment (IA) Writing Percent Correct.

Archival district data were analyzed using descriptive statistics, correlational analyses, hierarchical regression, moderation analyses, …

Effects Of Vitamin E Deficiency On Anxiety-Like Behavior In Zebrafish With Distinct Stress Coping Styles, Areem Zahid

Theses/Capstones/Creative Projects

Stress and anxiety disorders affect millions worldwide and represent a significant public health burden. Individual differences in stress coping style and antioxidant regulation contribute to variability in stress responsiveness and anxiety-related behaviors. Oxidative imbalance has been implicated in the neurobiology of anxiety, but its interaction with inherent stress coping phenotypes remains unclear. This study examined whether long-term dietary vitamin E deficiency alters anxiety-like behaviors in zebrafish selectively bred for proactive and reactive stress coping styles. Adult zebrafish were maintained on either a vitamin E–sufficient or vitamin E–deficient diet for five months, followed by behavioral assessment using the novel tank diving …

Immigrants: Neighbors Or Strangers? An Analysis On Christian Thought And Immigration, Mariah G. Rivera

Theses/Capstones/Creative Projects

This thesis examines the relationship between Christian thought and perspectives on immigration in the United States, particularly in the context of the current Trump administration, which is focusing heavily on restrictive immigration policies. It explores the historical relationship between religion and government through government commissions, as well as changes in key immigration policies such as the “sensitive locations” guidelines affecting enforcement at and near places of worship. Drawing on biblical scripture, the thesis identifies key themes of loving the stranger, assisting the vulnerable, and obeying governing authorities, all of which inform Christian interpretations of immigration.

Through analysis of national and …

Advances In Computational Methods For Sparsity-Promoting Linear Inverse Problems, Jonathan Lindbloom

Dartmouth College Ph.D Dissertations

Inverse problems arise throughout science and engineering, where indirect, incomplete, and noisy observations are used to recover unknown parameters of interest. In these applications, the corresponding forward or measurement models are often ill-conditioned or underdetermined, so direct inversion is unstable and regularization is required. This thesis develops computational methods for linear inverse problems in which the unknown is assumed to be approximately sparse in a transformed domain defined by a linear, possibly rank-deficient operator, such as a finite-difference matrix, with particular emphasis on large-scale problems.

The thesis makes three main contributions. First, it generalizes hierarchical Bayesian maximum a posteriori estimation …

Analytically Evaluating The Efficacy Of Work-Based Learning And Classroom Based Learning In Workforce Development Programs, Melissa Anne Sadler-Nitu

Theses and Dissertations

Workforce development systems in the United States provide occupational training to improve employment outcomes for individuals facing barriers to employment. Training is commonly delivered through classroom-based training (CBT) offered by educational institutions or through work-based learning (WBL) delivered in partnership with employers. Although both approaches are widely used within workforce development programs, limited empirical research has examined whether occupational training prior to employment improves employment retention or whether WBL produces stronger employment outcomes than CBT.

The purpose of this quantitative causal-comparative ex post facto study was to examine the relationship between occupational training and short-term employment outcomes among workforce participants …

My Journey As A Migrant Bilingual Learner From Student To Teacher: Lessons Learned, Sylvia Lopez

Theses and Dissertations

These reflections in this thesis are an analysis of narratives based on my lived experiences as an immigrant, migrant student who is now a certified Bilingual & Special Education teacher servicing students, many of whom are bilingual, in public school classrooms. My goal is to connect my life experiences to teaching practices and thus embrace and celebrate my linguistic identity. Bilingual educators have a language learning journey that drives their classroom practices. When bilingual teachers reflect on their bilingual trajectory and connect their life experiences to research, they may provide spaces for stronger positive impacts on bilingual students, and their …

Insights Into Androgen Receptor Allosteric Modulation By P,P'-Dichlorodiphenyldichloroethylene Binding At The Binding Function-3 Site And Site-Specific Binding Function-3 Mutations, Emanuel Aggeo Flores

Theses and Dissertations

One of DDT’s metabolites, p,p’-dichlorodiphenyldichloroethylene (DDE), has been classified as an endocrine disrupting chemical (EDC) due to its ability to interfere with hormone signaling by binding to nuclear receptors (NR) such as the androgen receptor (AR).

Structurally, the AR contains a ligand-binding domain (LBD) where endogenous steroids bind. Furthermore, the LBD contains a surface binding site known as binding function-3 (BF-3), which studies suggest exerts an allosteric effect on bound DHT when small, hydrophobic molecules bind.

Here, we present a study that examines how specific BF-3 site mutations and DDE binding affect steroid stability within the LBP utilizing computational methods. …

Using Behavioral Monitoring To Assess Activity Patterns And Welfare Indicators In Captive Black Howler Monkeys (Alouatta Caraya), Ramiro Gomez Iii

Theses and Dissertations

This study examined activity patterns and potential welfare indicators in captive black howler monkeys (Alouatta caraya) using behavioral monitoring techniques. A monogamous pair housed indoors at Gladys Porter Zoo was observed using focal sampling methods, and a species specific ethogram was developed to systematically record behavior. A total of 1,750 minutes of data were collected over one year. Observed behaviors were categorized into five groups: affiliative, agonistic, stationary, locomotion, and stereotypic behaviors. Activity budgets were calculated to determine the proportion of time allocated to each behavioral category. Results indicated that affiliative behaviors, particularly physical contact, dominated the activity budget, while …

Mineral King Cabin Roof Rennovation, Leilani G. Lau

Architectural Engineering

This project explored performance-based design by analyzing and redesigning the roof for a cabin built in the 1950s and located in Mineral King Valley in the Sierra Nevada Mountains, California. The Sierra Nevada Mountains experience heavy amounts of snow during the winter season. In the winter, the cabin is unoccupied, so the performance objective was collapse prevention, rather than life safety. Since the performance objective focused on collapse prevention at a time when the building was unoccupied, the probability of failure did not need to be low, so safety factors were omitted. This approach required deeper understanding of the code …

Exploring The Role Of Video Games In Civil Engineering Education And K-12 Stem Engagement, Jillian S. Codron

Architectural Engineering

Civil engineering education has traditionally emphasized a linear progression from theory to application, with foundational concepts introduced in lecture before being reinforced through laboratory or design experiences. While effective for advanced learners, this approach can limit early engagement for K–12 students who may struggle to connect abstract principles to realworld engineering practice. This project examines the use of video games as interactive, feedback-driven environments for introducing civil engineering concepts and practices to younger learners in more exploratory and accessible ways.

The study pursues four primary objectives: evaluating the educational affordances of selected video games; examining how gaming experiences have influenced …

Authoritarian Bidding: Domestic Institutions And The Domestic Politics Of Mega-Sporting Event Campaigns, Zanela Denise Sygaco Bajarias

Theses and Dissertations

This study examines why some authoritarian regimes bid for mega sporting events while others do not. While existing research focuses primarily on the impacts of hosting, this paper shifts attention to the political logic of bidding itself. It argues that bidding is not merely a preparatory step but a strategic political act. Drawing on selectorate theory, audience cost theory, and research on authoritarian institutions, the study proposes that variation in bidding behavior is driven by differences in institutionalization. Authoritarian regimes with nominally democratic institutions, such as legislatures, parties, and controlled media, face broader domestic audiences and stronger incentives to demonstrate …

I Am Still Learning, Too!: Pre-Service Teachers' Experiences Of Mathematics Anxiety In An Inquiry-Based Mathematics Education Course At Utrgv, Jeremiah James Adriano Dela Rosa

Theses and Dissertations

Mathematics anxiety is a prevalent issue in mathematics education that negatively impacts students’ learning, performance, and engagement in mathematics. Prior research suggests that mathematics anxiety is often shaped by students’ experiences and emotional responses within the classroom environment.

The purpose of this study is to explore how Pre-Service Teachers experience mathematics anxiety in an Inquiry-Based Mathematics Education (IBME) classroom. This study employed a qualitative research design supported by descriptive survey data collected through the Abbreviated Mathematics Anxiety Scale (AMAS), selected components of the Fennema-Sherman Mathematics Anxiety Scale (FSMAS), and semi-structured interviews. The survey instruments were used to provide descriptive background …

F.L.A.I.R. -- A Flow-Level Autoencoder For Intrusion Recognition, Joseph P. Dumond

Electrical Engineering and Computer Science Undergraduate Honors Theses

Industrial Internet of Things (IIoT) networks underpin critical infrastructure worldwide, yet securing them remains an open challenge. Traditional intrusion detection systems require labeled attack data for training, a resource that is rarely available in real industrial deployments. They also fail against novel threats, a model trained on known attacks has no basis for detecting anything outside its training set. This thesis presents a Flow-Level Autoencoder for Intrusion Recognition, or FLAIR, a fully unsupervised deep learning system for network intrusion detection in IIoT environments. FLAIR is built on a Gated Recurrent Unit (GRU) autoencoder trained exclusively on normal network traffic. Rather …

Securing Distributed Energy Resources: A Dnp3 Master Station With Semantic Web Integration For Decentralized Der Data Sovereignty, Ethan J. Coffman

Electrical Engineering and Computer Science Undergraduate Honors Theses

As current electrical grids trend toward a heavier reliance on DERs, there is a growing need to secure DER communications while maintaining data sovereignty for device owners. Previously, work by Donna Thakadipuram established the foundation for a decentralized framework using Solid by implementing a prototype that used a Raspberry Pi and a DSP to simulate Modbus traffic and upload the data to a Solid server. This thesis extends her work to simulate multiple DERs using Typhoon HIL and communicate to each device over DNP3/TCP. The system uses a Python-based DNP3 master to collect telemetry from all 12 DERs before transforming …

From Mobilenet To Repvit: A Survey Of Edge-Optimized Computer Vision Architectures, Eli A. Bosch

Electrical Engineering and Computer Science Undergraduate Honors Theses

Edge-optimized computer vision is a constantly evolving field where the definition of efficiency has changed repeatedly. This thesis presents a literature survey of four recent Convolutional Neural Network (CNN) families, all analyzed through a consistent framework of accuracy, parameter count, and Multiply-Accumulate Operations (MACs), alongside a survey of five CNN and Vision Transformer (ViT) hybrid models to examine the direction of the field. It was found that accuracy follows a logarithmic curve with respect to parameter count, exhibiting diminishing returns as models scale. This suggests that architectural design contributes more to performance gains than parameter count alone. Theoretical efficiency metrics …

Performance Comparison Of A Two-Level And A Three-Level 1500v Three-Phase Grid-Tied Solar Inverter, Shawn Sproles

Electrical Engineering and Computer Science Undergraduate Honors Theses

With the global switch to renewable energy sources, photovoltaic energy has become an integral source to harvest from. When solar panels convert sunlight into a DC voltage, a grid-tied inverter is needed to transform this DC voltage into an AC voltage to interface with the AC grid. The most widely used topologies for grid-tied solar inverters are two-level three-phase inverters and three-level NPC three-phase inverters. Compared to two-level inverters, three-level NPC inverters have advantages such as lower EMI, lower THD, and lower switching losses. Moreover, three-level NPC inverters are shown to have higher efficiency in low-voltage applications at medium to …

A Case Study On Using Large Language Models To Drive Convergence-Oriented Literature Discovery In Critical Infrastructure Security, Caden J. Williamson

Electrical Engineering and Computer Science Undergraduate Honors Theses

In the world of cybersecurity, the rapid development of artificial intelligence proposes a constant challenge for researchers to defend critical infrastructure. Attacks on critical infrastructure can be catastrophic, and emerging strategies of cyber-adversaries that implement leading AI models can expose vulnerabilities in critical infrastructure much faster than previous tools. To defend against this emerging threat, the Cybersecurity Research Working Group at the University of Arkansas is aiming to develop a cross-domain and cross-discipline center of excellence. To support this effort, the group is writing a literature review on the topics of AI and critical systems security. Literature review is an …