Digital Commons Network^™

A New Approach To Generate Combinatorial Patterns In Logical Analysis Of Data And Its Application To Predict College Retention, Salihah Ahmed E. Jaafari

Theses and Dissertations

Student retention and degree completion remain central challenges for higher-education institutions, with significant implications for student success, institutional effectiveness, and public accountability. While advances in predictive analytics have enabled earlier identification of students at risk of withdrawal, many commonly used machine learning approaches suffer from limited interpretability, constraining their practical usefulness for advising, intervention, and policy decision making. This dissertation addresses the problem of predicting student persistence by developing and evaluating optimization based, interpretable classification models within the Logical Analysis of Data (LAD) framework. Building on existing LAD formulations, this research introduces two novel pattern generation models, the Best Term …

Hdra-Fusion: Hybrid Detection With Routed Architecture For Manipulation-Aware Ai Face Forgery Detection, Omar Ebeid

Theses and Dissertations

With the rapid advancements in artificial intelligence-based image generation and manipulation tools, it is extremely difficult to detect if an image is genuine or artificially crafted. Despite extensive research in this area, existing image detection systems suffer from three major problems: suboptimal cross-dataset generalization due to shortcut learning of dataset-specific patterns, unreliable probability estimates due to domain shift, particularly in cross-manipulation evaluation settings, and an inability to detect images manipulated by multiple types of manipulations within a single detection framework. To address these limitations, we propose HDRA-Fusion (Hybrid Detection with Routed Architecture), a framework built on the conclusion that different …

Design And Simulation Of Anti-Resonant Hollow-Core Fiber For Sensing Applications, Pravallika Kante

Theses and Dissertations

This thesis presents the design and simulation of an 8-tube single-ring anti-resonant hollow-core fiber for sensing applications, with particular emphasis on methane gas detection at the fundamental absorption wavelength of 3.3 µm. Conventional solid-core silica optical fibers exhibit strong multi-phonon material absorption beyond 2.5 µm, rendering them fundamentally unsuitable for efficient light guidance and direct gas sensing at mid-infrared wavelengths. Anti-resonant hollow-core fibers overcome this limitation by guiding light predominantly through an air-filled hollow core via the anti-resonant reflecting optical waveguide mechanism, in which the thin silica glass walls of the cladding tubes act as Fabry-Pérot etalons that confine the …

Hybrid Machine Learning For Zero-Day Malware Detection: An Adaptive Static-Dynamic Analysis Approach, Garrett Farmer

Theses and Dissertations

In an era of swiftly evolving cyber threats, zero-day malware continues to be one of the most challenging classes of attacks to detect and mitigate. Traditional signature-based methods often fail to detect novel malicious code, leaving institutions vulnerable to unknown exploits. This thesis proposes a machine learning (ML)-based framework that is designed to detect unknown malware variants. By combining both static and dynamic techniques, such as file structure exam ination and sandbox-based runtime analysis, this approach aims to successfully capture malicious characteristics. The proposed custom pipeline addresses the computational overhead that is associ ated with deep inspections, outlining a staged …

Comparison Of The Effects Of Participation In Early Childhood Education On Readiness Outcomes, Pre- And Post-Covid-19 In A South Texas District, Maria J. Valadez Gonzales

Theses and Dissertations

This study will investigate and gather quantitative data noting if a learning gap exists when evaluating reading data of students participating in a high-quality learning program in 2020 due to the pandemic. RQ1: What gaps are evidenced by progress monitoring TPRI/TJL data from 2019 Beginning of Year (BOY) Kinder pre-pandemic when compared to 2020 post-pandemic BOY data in First grade for educationally disadvantaged students in a South Texas school district? RQ2: Do students who attend these ECE high quality prekinder programs show differing levels of academic achievement utilizing progress monitoring assessments in reading for Kinder – First grades (Wyse et …

Phenotypic Contribution And Regulation Of Vibrio Parahaemolyticus Cold-Shock Protein Homologue Vp1889, Oleg Borisovich Ermolinsky

Theses and Dissertations

Vibrio parahaemolyticus is the primary causative agent of a form of gastroenteritis called vibriosis commonly acquired from ingestion of raw and undercooked seafood. The primary mitigation of seafood-borne illnesses is immediate storage on ice following catch, which inhibits bacterial metabolism and replication. Mesophilic bacteria such as V. parahaemolyticus induce expression of cold-shock proteins in a process named the cold shock response, which facilitates survival at low temperatures. V. parahaemolyticus bears 3 homologues of the major Escherichia coli cold-shock protein CspA, an RNA chaperone. Induction of E. coli CspA at low temperatures depends on autogenous modulation by its mRNA structure, which …

“Oh, Hey, Miss, Why Am I Taking This Test?”: Amplifying The Critical Voices Of Long-Term Emergent Bilinguals From The Rgv On Telpas, Luisa Adriana Valdez

Theses and Dissertations

This qualitative narrative study examines the lived experiences of seven Long-Term Emergent Bilinguals (LTEBs) in Texas public schools, with a particular focus on the TELPAS test and its role in shaping students’ academic trajectories. Grounded in decolonial theory and a raciolinguistic ideological perspective, the study investigates how state-mandated English proficiency assessments and identification practices reproduce inequities and racialized linguistic hierarchies. Using pláticas as a culturally sustaining methodological approach, narrative accounts were collected from seven U.S.-born, Spanish-English bilingual Latinx students from the Rio Grande Valley. Findings reveal that the home language survey and TELPAS language proficiency assessment function as colonial sorting …

Combinatorial Statistics Witnessing An Infinite Family Of Congruences For A Sum Of Partition Functions, Jena M. Gregory

Theses and Dissertations

In 2007, Kronholm established The Interval Theorem, infinite families of congruences in arithmetic progression, modulo any prime ��, for ��(��, ��), the function enumerating the partitions of �� into parts whose sizes come from the set {1, 2, … , ��}. In 2022, Eichhorn, Kronholm, and Larsen proved there are combinatorial statistics described in terms of the multiplicities of the part sizes that witness Kronholm’s Interval Theorem. Here, “witness" means given a congruence of the form ��(��, ��) ≡ 0 (mod ��), we can use these statistics to classify the set of partitions of �� into �� equally sized subsets …

Shifting The Gaze: What Do High School Ela Teachers Mean When They Talk About Literacy For Students In Their On-Level Classes?, Yvonne Ceynow

Theses and Dissertations

This critical narrative inquiry explored how six high school English Language Arts (ELA) teachers defined literacy for students sitting in their on-level classes. By shifting the focus from student performance to teacher meaning-making, this research sought to understand how foundational beliefs about literacy shaped instructional and pedagogical decisions. Data was collected through digital journal entries, semi-structured interviews, and instructional artifacts. Using a thematic analysis approach, five interconnected themes emerged: the pervasive use of deficit-based language to describe on-level students; the perception of this group as high-need, requiring extensive scaffolding; the belief that socioeconomic status and parental support were key differentiating …

Developing Ai Literacy In Preservice Stem Teachers: Exploring The Role Of Pedagogically Grounded Engagement With Generative Ai In Lesson Planning, Omar Raul Elizondo

Theses and Dissertations

The rapid advancement of generative artificial intelligence (GenAI) is introducing new opportunities and challenges in education. This qualitative multiple-case study explored how preservice STEM teachers developed AI literacy through structured engagement with GenAI during inquiry-based lesson planning. Grounded in Ng et al.’s (2021) four-domain AI literacy framework, the 5E instructional model, and the Theory of Planned Behavior (TPB), the study examined how preservice teachers conceptualized, applied, evaluated, and ethically reasoned about GenAI-supported outputs while designing lessons aligned with the Texas Essential Knowledge and Skills (TEKS).

Participants were three preservice STEM teachers enrolled in the University of Texas Rio Grande Valley’s …

From Homeland To The Foreign Classroom: The Salaysay Of Filipina Immigrant Teachers In Texas, Shanna Cui Miranda

Theses and Dissertations

Filipina immigrant teachers are a growing presence in Texas schools, especially as districts respond to teacher shortages by recruiting internationally trained educators. This narrative study explores the salaysay of Filipina immigrant teachers in Texas and examines how their funds of knowledge inform their teaching practice. Guided by the research question, What are the salaysay of Filipina immigrant teachers in Texas, and how do their funds of knowledge inform their teaching? The study uses Funds of Knowledge (Moll et al., 1992) as the central framework and resizes it to focus on teachers as holders of culturally developed knowledge. The resized framework …

Haciendo Caras Y Hablando Para Atrás: Conceptualizing Espacios Coyunturales/Bridged Spaces As Teachers Resistance To Contemporary Reactionary Legislative Initiatives In K-12 Social Studies, Brittney Louise Thornton-Guzman

Theses and Dissertations

This study examines how teachers in the Rio Grande Valley engage in subversive resistance within the context of contemporary legislative constraints regulating discussions of race, identity, and history in K–12 classrooms. Grounded in Chicana Feminist Epistemology (Delgado Bernal, 1998) and informed by Aoki’s distinction between curriculum-as-plan and lived curriculum (Aoki, 2005), this qualitative study employs critical narrative inquiry (Clandinin & Connelly, 2000) and analysis of narrative to explore how educators navigate stateimposed restrictions. Drawing on teacher narratives, the study centers hablando para atrás (hooks, 1989) as a pedagogical stance through which educators sustain critical engagement under conditions of constraint. Findings …

Overreliance On Standardized Testing And Its Impact On The Classroom Experience, Cassia Guajardo

Theses and Dissertations

High-stakes standardized testing has become a dominant force in U.S. education system, shaping curriculum, pedagogy, and accountability systems in ways that can narrow instructional breadth and constrain teacher autonomy. This study examined how these dynamics are experienced by educators working in a predominantly Latinx, border-region district in South Texas. The purpose was to explore K–12 teachers lived experiences with standardized testing and their perceptions of its effects on curriculum, teaching methods, and classroom assessment practices within McAllen Independent School District (ISD).

Using a basic qualitative design, data was collected through an anonymous, open-ended questionnaire. Twenty-five practicing teachers from elementary, middle, …

“Now I Know The Kind Of Leader I Want To Become”: Leadership Development And Professional Growth Through The Lens Of Transformational Leadership Theory, Manuel Angel Saenz

Theses and Dissertations

Organizations increasingly rely on leadership development programs to strengthen succession planning and prepare middle managers for expanded responsibilities, yet limited research has explored how participants experience these initiatives in fast-paced, customer-centric environments. This qualitative descriptive case study examined the lived experiences of 11 middle managers and directors participating in the LEAD Forward program within a Government Contact Center. Guided by Transformational Leadership Theory, the study investigated (a) how participants perceived the program’s impact on their professional development and leadership skills and (b) the challenges and opportunities they encountered during participation. Data was collected through two written narrative reflections and 11 …

Voices From The Classroom: Elementary Teachers’ Perspectives On Teaching And Learning During The Covid-19 Pandemic – A Case Study And Autoethnography, Alicia Lopez-Hernandez

Theses and Dissertations

Guided by constructivist learning theory and sociocultural theory, this qualitative case study and autoethnography examines how bilingual educators constructed knowledge, adapted instructional practices, and utilized mediational tools within face-to-face, online and hybrid learning environments. These frameworks informed the study’s design, data analysis, and interpretation of findings related to pedagogy, technology integration, and student engagement. Data was collected through semi-structured interviews, naturalistic observations, and autoethnographic reflective journaling.

Faculty Perspectives On Co-Teaching Mathematics: A Focus On Corequisite Education, Aleksandra Shchelkunova

Theses and Dissertations

This study aimed to contribute to the literature by expanding the knowledge on coteaching practices to the area of higher education. Traditionally, co-teaching was considered uncommon in college courses. However, with the increasing popularity of corequisite courses - often structured as linked classes taught by two different instructors - co-teaching has become a new popular trend in higher education. In this research, I compared co-teaching models utilized in K-12 settings with those applied at the college level mathematics courses and analyzed the reflections of faculty members who have experience with team teaching.

This qualitative single-case study was conducted using convenience …

Chatbots In The Classroom: Understanding The Impact Of Chatbot Integration In Writer’S Workshops On High School Students’ Writing, Gabriel Cerda

Theses and Dissertations

Writing is a complex developmental skill, and much research has been conducted to understand in which ways to best close the gaps that national data indicates exist for students in K-12 education. This quasi-experimental study explored how integrating chatbots as dialogue agents within a writer’s workshop framework influences the quality of written compositions among Grade 12 students. The research was grounded in the Direct and Indirect Effect Model of Writing (DIEW) and the Writer(s)-Within-Community (WWC) model, which emphasize both the cognitive and social-emotional dimensions of the writing process.

Participants received real-time, individualized feedback, with pre- and post-test essays evaluated using …

Analyzing Criteria Air Pollutants And Meteorological Parameters In The Rio Grande Valley, Laredo, And Corpus Christi Region Of South Texas, Angela Garcia

Theses and Dissertations

Recently, the Rio Grande Valley has experienced significant population growth due to economic opportunities, cross-border commerce, SpaceX, and the Rio Grande and Texas liquid natural export terminal presence. The Rio Grande Valley has an estimated population of 1,368,723. This region is largely understudied, along with nearby urban centers such as Laredo and Corpus Christi. The Rio Grande Valley and Laredo regions are a concern due to their population growth and heavy cross-border transportation. Data from the Texas Commission of Environmental Quality Continuous Ambient Monitoring Sites was collected from January 1st , 2024, to December 31st, 2024. Statistical analysis, such as …

Curriculum, Power And Pedagogical Becoming: An Autoethnographic Inquiry Into Lived Curriculum, Teacher Agency And Institutional Constraints, Norma Ochoa Urban-Palomarez

Theses and Dissertations

My dissertation, Curriculum, Power, and Pedagogical Becoming, examines the complex relationship between institutional curriculum structures, teacher agency, and the lived realities of classroom practice within U.S. public schooling. Situated at the intersection of curriculum theory and critical pedagogy, the study investigates how power operates through scripted curricula, pacing mandates, and fidelity-driven instructional models, and how these mechanisms shape pedagogical decision-making, professional identity, and the educational experiences of Hispanic students of poverty, language, and color. While standardization is frequently framed as a vehicle for equity and accountability, this research explores how institutional constraints may simultaneously regulate teacher practice and delimit possibilities …

Inclusive Perspectives In Early Childhood Special Education: Navigating Experiences Of Families And Educators In The South Texas Community, Jessica Ann Garza

Theses and Dissertations

This study examines the relationship between family systems and inclusive outcomes in Early Childhood Special Education (ECSE) programs in South Texas. Guided by Family Systems Theory and the family life cycle perspective, the research explores how family structures, cultural values such as familismo, bilingualism, and cross‑border healthcare access influence educational engagement and student progress. The South Texas region, characterized by its majority Hispanic population, bilingual households, and proximity to the U.S.–Mexico border, presents a unique context for understanding how cultural assets and systemic barriers shape ECSE collaboration. Using a convergent parallel mixed‑methods design, the study integrates quantitative survey data on …

Elementary Teachers' Culturally Responsive Strategies For Fostering Critical Thinking In Science Instruction With Emergent Bilinguals, Lydia Stella Ratel

Theses and Dissertations

This phenomenological study explored the lived experiences of bilingual and English as a Second Language (ESOL)-certified elementary teachers as they fostered critical thinking among emergent bilingual (EB) students in grades 3–5 science classrooms. Grounded in culturally responsive pedagogy, translanguaging, funds of knowledge, and critical thinking theory, the study examined how teachers made sense of instructional decision-making and EB students’ scientific reasoning within accountability-driven educational contexts.

Data were collected through in-depth, semi-structured interviews with elementary teachers serving emergent bilingual students in South Texas public schools. Phenomenological analysis was used to identify shared meanings across participants’ descriptions of instructional practices, language use, …

Bayesian Change-Point Detection In Stock And Cryptocurrency Markets Using Shrinkage Priors, Yosalin Sanchez

Theses and Dissertations

Financial markets often undergo abrupt structural changes driven by political, economic, and geopolitical events, leading to substantial volatility. Detecting such change-points is crucial for identifying structural breaks, improving risk management, and enhancing forecasting performance in financial time series. This study proposes a Bayesian change-point detection framework that incorporates both the t-shrinkage prior and the Horseshoe shrinkage prior. These priors enforce strong regularization on successive differences in mean parameters, enabling the identification of piecewise constant structures in time series data. Posterior inference is conducted using Markov Chain Monte Carlo (MCMC) methods, specifically a Gibbs sampling algorithm, which iteratively samples from the …

Essays On Ai-Driven Analytics For Enhanced Healthcare Delivery: From Onset To Outcomes In Neurological Diseases Management, Gabriel Owusu

Theses and Dissertations

Chronic neurological diseases, particularly Alzheimer's disease and related dementias (ADRDs), pose mounting global healthcare burdens. Despite advances in AI and health information technologies, early detection, precise diagnosis, and effective caregiver support remain elusive. This dissertation proposes innovative AI-enabled analytical frameworks to address these challenges across the full ADRD continuum.

The first essay designs an explainable AI-enabled clinical decision support system (CDSS) using a graph neural network for early AD identification, evaluated through usability studies demonstrating improved risk awareness and clinical engagement. The second essay introduces MADT-RNN, a multi-level attention-based deep transfer recurrent neural network that fuses convolutional and recurrent architectures …

Two Essays On Finance: The Dark Side Of The Ceo Inside Debt: Evidence From Stock Price Crash Risk And Cybersecurity Risk And Corporate Bond Yield Spreads, Amir Gholami

Theses and Dissertations

This dissertation comprises of two papers. In the first paper, I found that despite being thought of as a governance mechanism, CEO inside debt seems to distort firms’ information environment. My results indicate that the CEO inside debt creates an incentive for managers to hoard bad news to prevent technical defaults, leading to increasing stock price crash risk. My results are robust after addressing endogeneity using the instrumental variable (IV) approach, a difference-in-differences test based on the implementation of Internal Revenue Code Section 409A Final Regulations, and Oster’s omitted variable diagnostic test, and selection bias using the propensity score matching …

The Effects Of Ai Adoption On Digital Entrepreneurial Intention: A Meta-Analysis, Xandra Precious Okori

Theses and Dissertations

AI adoption and its widespread use have sparked debates about the future of work, job displacement, and the evolving entrepreneurial landscape. While AI is often seen as a threat to traditional employment, research shows that this emerging technology is more likely to change task structures rather than eliminate entire occupations or industries. This shows that there are new entrepreneurial opportunities, particularly digital, that potential entrepreneurs can venture into. This thesis uses a meta-analytic approach to study the relationship between AI adoption and digital entrepreneurial intention, addressing inconsistencies in current research.

Following PRISMA guidelines, a comprehensive search was conducted across Web …

Exit Topology Effects On Low-Mach Jet Impingement, Alejandro Garcia

Theses and Dissertations

Planar PIV characterizes a low‑Mach (M = 0.05) air jet impinging normally on a plate at fixed spacing H/D = 4.0. Four nozzles of equal hydraulic diameter (D = 50.8 mm) are compared: circular, rectangular (AR 3), diamond, and elliptical (AR 2); asymmetric exits are tested in major and minor orientations. Mean velocity, azimuthal vorticity, and turbulence kinetic energy reveal that exit topology strongly modulates the stagnation footprint and shear‑layer growth. The circular jet forms the canonical toroidal wall jet and a narrow stagnation core (dₛ = 0.9D). Orienting the rectangular major axis toward the plate elongates the core to …

From Witness To Weapon: How Elizabeth Barrett Browning’S “The Cry Of The Children” Embodies And Transforms The Rhetorical Situation, Elyssa Vianey Solis

Theses and Dissertations

Elizabeth Barrett Browning’s “The Cry of the Children” employs trauma-driven rhetoric to expose Victorian child labor exploitation.

Combining literary analysis with rhetorical theory, this research contextualizes the poem within 19th-century industrial exploitation, showing how Browning transforms documentary evidence like the 1842 Children’s Employment Commission Report into emotional testimony. Visceral imagery, ironic juxtaposition, and embodied suffering weaponize pathos to reveal systemic abuse and moral urgency. Applying Lloyd Bitzer’s and Richard Vatz’s theories, we can posit that Browning both responds to and defines the crisis, merging poetic protest with social reform as civic intervention.

By engaging Bitzer and Vatz, this paper argues …

Chronicles Of A Caliche Road: Lessons From The Monte Through A Poetic Currere Of Language, Memory, And Identity, Brenda Ochoa

Theses and Dissertations

This autobiographical study explores how language, memory, and identity are shaped through lived experience in the South Texas brushland known as the monte. Situated within the cultural and linguistic landscape of the Rio Grande Valley, the study examines how land, native plants, and regional wildlife function as an informal curriculum that shapes voice, silence, and ways of knowing beyond formal schooling. Grounded in autobiographical inquiry, the study uses poetic currere as both an analytic process and a mode of representation to illuminate the relationship between language experience, memory, and identity across time. Data sources include personal memories, reflective journals, original …

Use Of Complementizer That Among English-Spanish Bilinguals, Aziz Abraham Quenun

Theses and Dissertations

Languages vary in how they signal the presence of an embedded clause. Both English and Spanish use what are termed complementizers—that in English and que in Spanish—but in English, the complementizer is often optional while in Spanish, it is generally required. This thesis tested if the presence of que in a Spanish sentence could induce a bilingual speaker to insert a previously omitted that into an English sentence using a syntactic priming task. The results of these trials showed that this was the case, finding a statistically significant priming effect, supporting the idea that syntax is cognitively shared across languages …

Academic Anxiety, Anxiety Sensitivity, And General Mental Health In Collegiate Student-Athletes, Finley Gabrielle Elkins Sims

Theses and Dissertations

Collegiate athletes’ mental health is on the decline, and they have unique experiences that can influence the prevalence of mental health struggles. This study examined academic anxiety, comorbid forms of anxiety, and predicting factors in 187 collegiate student-athletes across 29 U.S. colleges. Athletes had significantly higher levels of academic anxiety and general anxiety compared to a college nonathlete population. There were significant gender differences in athletes, with females having greater levels of anxiety sensitivity, academic anxiety, sport anxiety, general anxiety, depression, and a history of depression than male athletes. Gender, history of depression, anxiety sensitivity, and depression were significant predictors …