Digital Commons Network^™

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 …

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 …

General Chemistry Students' Perceptions Of How Various Course Resources Affect Their Learning And Exam Preparation, Jennifer Scoggin Cortez

Theses and Dissertations

The tertiary-level first-semester general chemistry course has a large range of material with different complexities that can be difficult for students to master within one semester. In the general chemistry I course under study here, students were provided with a variety of resources to help with their learning and understanding, with various components of the course, including the lecture, online textbook, Peer-Led-Team-Learning (PLTL) study sessions, and exams, having associated resources. This study aims to analyze students’ experiences with these various resources. Students were given semi-structured interviews where they talked about their experiences with the resources and provided insight into more …

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 …

Assessing Water Quality And Nitrogen Dynamics In Bahia Grande, Texas Using Field And Remote Sensing Data, Sk Taufiqul Islam

Theses and Dissertations

An 8,220-acre estuary in South Texas, Bahia Grande has recently been restored from a disconnected hypersaline basin to a tidal estuary. A spatially explicit water quality index (WQI) was developed and in situ physicochemical data coupled with remote sensing data from Sentinel-2 were used to determine ecological integrity. A WQI from 29.45-53.20 yielded a spatial distribution of water quality that displayed a non-linear spatial trend throughout the estuary. Water quality close to the Brownsville Ship Channel inlet yielded values of 'Moderate/Stressed' water quality (> 50). These areas represent local zones of disturbance where ammonium concentrations were more than 11 µmol/L. …

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 …

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 …

The Effect Of Drought On Avian Migratory Patterns And Stopover Through Texas And Louisiana, Ian Becker

Theses and Dissertations

Extreme weather events pose a massive threat for native ecosystems. As precipitation and temperature patterns are altered due to climate change, drought may become an incredibly severe event on the landscape. Drought directly impacts resources that migratory birds need during stopover en route to breeding and non-breeding grounds. Here, I quantify the impacts of drought on migration through Texas and Louisiana using 26 years of weather surveillance radar data. To understand how drought interacts with the local environment to impact migration, I tested 4 hypotheses displaying drought’s ability to impact migrants in conjunction with climatic and habitat level characteristics. Fall …

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 …

Ethanol State-Dependent Learning In The Honey Bee (Apis Mellifera), Ethan Neil Govea

Theses and Dissertations

Ethanol disrupts neural circuits involved in addiction and withdrawal, yet the molecular mechanisms underlying these effects remain poorly understood. One possibility is that ethanol alters an animal’s perceptual or internal state, causing a stimulus learned while intoxicated to be processed differently when the animal is sober. This study examined how ethanol exposure affects odor learning, recall, and discrimination in honey bees, a useful model because of their robust olfactory learning and experimentally accessible neural systems. Bees were differentially conditioned with appetitive reward (sucrose) during hexanol exposure and aversive stimulus (quinine) during decanol exposure. To assess olfactory processing and state dependency, …

Vision-Based Vibration Monitoring Of Civil Structural Damage Detection Using A Low-Cost Autonomous Uav, Javier Antonio Becerril

Theses and Dissertations

This thesis presents the development and experimental validation of a low-cost autonomous unmanned aerial vehicle (UAV) for non-contact vibration-based structural damage detection. We extract structural vibration signals directly from video recordings captured by the onboard camera during flight. The extracted vibration signals are analyzed in the frequency domain to identify natural frequency shifts associated with structural degradation and damage.

To evaluate the effectiveness of the proposed approach, a laboratory-scale steel frame structure is tested under both healthy and simulated damage conditions. In contrast to advanced commercial UAV inspection systems, the developed UAV achieves comparable inspection capability at a significantly lower …

Developing A Qpcr Method For Evaluating Parasitoid Wasps As A Potential Means Of Control Of The Southern Cattle Fever Tick Rhipicephalus (Boophilus) Microplus In South Texas, Abbey Abalos

Theses and Dissertations

Ixodiphagus spp. wasps are natural enemies of ticks that have been reported to cause mortality in multiple tick species. Parasitoid wasps may represent a potential biocontrol alternative to traditional chemical tick control methods, which are challenged by non-target toxicity and the development of pesticide resistance in species of concern such as Rhipicephalus microplus, a pest of livestock that causes billions of dollars in loss to the livestock industry worldwide. Rhipicephalus sanguineus s.l. is a congeneric species of R. microplus, and parasitism of R. sanguineus by Ixodiphagus sp. in areas of co-occurrence has been observed. It is unknown if R. microplus …

Pesticides And Poverty: How Socioeconomic Factors Relate To Pesticide Application In The Continental Us, Reed Smetter

Theses and Dissertations

Pesticides are often used to help reduce the populations of weeds, insects, and pathogens in agricultural and urban settings, reducing the risk of outbreaks and losses of agricultural yield. The communities that surround agricultural areas often bear the brunt of the negative community and environmental health effects of these chemicals, and are frequently rural, poor, and lack critical infrastructure resources. Pesticide application volumes are often linked closely with specific health effects. In this study, I apply social vulnerability theory to compare the potential connections between the application rates of pesticides and socioeconomic variables across the United States using a nationwide …

“Daría Mi Vida Por Ti”: On The Rhetoric Of Sacrifice Through The Lens Of Motherhood From The Border, America Rodriguez

Theses and Dissertations

This thesis will discuss the implications of sacrifice as an ideology inflicted upon Chicana mothers. It will center on answering the following inquiry: why should a Chicana/Mexican mother sacrifice? This question addresses the role of sacrifice by discussing aspects of Chicana/Chicanx feminist rhetoric and Catholicism that influence the perception of motherhood as sacrifice and martyr. I construct and employ the rhetorical concept of MA↔MÁ to articulate the relationship between la maternidad y el martirio as attributed to mothers from the borderlands. This concept examines whether this affliction is bestowed by dominant and marginalizing narratives or self-imposed through divine merits. I …

A Visit-Count-Based Complete Foraging Strategy For Robot Swarms, Arturo Yahir Gonzalez

Theses and Dissertations

Swarm robotics systems often rely on a balance between exploration and exploitation to perform tasks like Central Place Foraging. While exploitation methods such as pheromone trails and site fidelity are well-studied, the efficiency of the underlying random search exploration remains a challenge, frequently leading to redundant coverage and wasted time as multiple agents repeatedly search the same fruitless areas. This thesis introduces a memory-enhanced exploration strategy designed to improve the efficiency of random search in a swarm of simple robots.

In our proposed algorithm, each robot, constrained with limited memory, periodically logs its recent locations while exploring. This spatial data …

The Impact Of Nutrition On Insecticide Resistance And Gene Expression In Aedes Aegypti, Esmeralda Guadalupe Rosas

Theses and Dissertations

The development of insecticide resistance in Aedes aegypti, a major vector of dengue and Zika viruses, threatens vector control efforts, particularly in endemic regions such as South Texas. Insecticides remain widely used; however, their overuse has accelerated metabolic resistance mediated by cytochrome P450 enzymes. Environmental factors such as larval nutrition may influence mosquito physiology and resistance-associated gene expression, yet this relationship remains poorly understood. This study examines how larval nutritional conditions affect the expression of cytochrome P450 genes linked to pyrethroid resistance in Aedes aegypti. Larvae were reared under five dietary treatments differing in lipid and protein ratios, and adults …

The Role Of Operational Context In Shaping Energy Management Portfolios: A Comparative Case Study Of Two Manufacturing Facilities, Cynthia Aranda

Theses and Dissertations

Using two facilities as illustrative examples, this research investigates how a manufacturing plant's operational and financial context may influence its investment decisions in energy-efficiency measures. This challenges the primacy of the simple payback period (SPP) as a screening tool and instead demonstrates the role of operational context in investment decision-making. To this extent, this study is anchored to a qualitative comparative case study analysis of two ITAC energy assessments for two manufacturing plants in Texas: a higher value-added aerospace MRO plant (GE Aerospace, TR0060) versus a cost-sensitive automotive stamping plant (UMP Metal Stamping, TR0061). The two cases illustrate two different …

Spatiotemporal Evolution Of Flow Decline And Water Consumption In A Highly Regulated Transboundary River: The Lower Rio Grande/Bravo, Ana Yarely Casillas Rodriguez

Theses and Dissertations

Long-term flow variability in transboundary rivers reflects the combined influence of water availability, infrastructure development, and binational water use. Integrating historical discharge with evolving water-use data remains challenging due to fragmented records and nationally bounded assessments. This study reconstructs a 125-year discharge record (1900–2025) from historical Water Bulletins and modern observations at 12 gauging stations, providing a spatiotemporal assessment of flow evolution and water-budget components in the Lower Rio Grande/Bravo (LRG).

Discharge records were grouped into four hydrologic regimes—natural (1900–1913), pre-dam (1935–1950), post-dam (1974–1989), and modern (2010–2025)—and analyzed alongside binational water-use data across major sectors. A basin-scale water budget, using …

Leading For Impact: An Explanatory Sequential Mixed Methods Study On Leadership Actions Driving Academic Gains Beyond Mock Projections, John Martinez

Theses and Dissertations

This study examined how principals lead schools to achieve academic outcomes that exceed projected performance. Using an explanatory sequential mixed methods design, the study first identified campuses that demonstrated statistically significant improvement between projected outcomes based on mock assessments and actual performance on state accountability measures. Quantitative analyses, including paired-samples t-tests, repeated measures ANOVA, and correlation analyses, revealed significant differences between projected and actual outcomes, variation across assessment cycles, and increasing alignment between mock and summative assessments over time. Standardized mean difference scores were used to identify campuses that demonstrated the greatest positive deviation from projected performance.

In Phase 2, …

Probing The Dynamic Behavior Of The Androgen Receptor In The Presence Of Heptyl And Methyl Parabens, Edgardo De Leon

Theses and Dissertations

The androgen receptor (AR) mediates physiological signaling from endogenous androgens, a function that can be disrupted by endocrine disruptors with serious reproductive and developmental consequences. Parabens, widely used preservatives, inhibit AR signaling in cell-based assays, with inhibitory potency correlating with alkyl chain length: heptylparaben exhibits stronger antagonism than methylparaben, which shows no effect. We hypothesize this differential potency arises from allosteric modulation at the AR Binding Function 3 (BF-3) site, altering dihydrotestosterone (DHT) binding dynamics. Docking calculations using antagonist-bound AR crystal structures, followed by molecular dynamics simulations, show that methylparaben fails to remain bound at BF-3, whereas heptylparaben maintains stable …

A Testimoniando On Tutoring Practices In A Predominantly Latine Writing Center: How Drawing From Tutors’ Memories Fosters Reflective Practices, Emily Michelle Rodriguez

Theses and Dissertations

The student body of the University of Texas Rio Grande Valley (UTRGV) consists primarily of Latine students, a population that is reflected in the Writing Center’s tutor demographics. Tutor practices connect to the training sessions that are based on disciplinary expectations but also incorporate each tutor’s epistemology, cultural beliefs, and lived knowledge experiences. To reflect on the practices, memories, and experiences that tutors collected at the Writing Center, the concepts of testimoniando and testimonios will serve as the praxis and means of sharing the experiences and lived knowledge of tutors who identify as part of a marginalized group; this allow …