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Ngc - Torch Test Ablation Stand Improvements And Upgrades, Sarah Nelson

Undergraduate Honors Capstone Projects

This capstone project is sponsored by Northrop Grumman (NGC). The goal of the project is to redesign an ablation torch testing system to improve usability, safety, and versatility. Northrop Grumman relies on their ablation torch testing system to conduct quantitative evaluations of materials and high stress and high temperature conditions. The system provides essential data that supports product development, safety validation, and compliance with performance standards. By improving usability, safety, and versatility, NGC will be able to streamline testing operations, increase accuracy of results, and reduce operator risk. The system must allow testing using both a bent and straight torch …

Application Of Path Analysis To Determine The Impact Of Age And Sex On The Neural Circuits That Promote Nicotine Withdrawal Severity, Veronika Espinoza

Open Access Theses & Dissertations

The rising prevalence of electronic cigarette (e-cigarette) use presents a major public health concern, particularly in adolescent females who are most susceptible to nicotine use and its long-term negative health consequences. The goal of this dissertation was to utilize preclinical rodent models to understand how group differences in age and sex influence neural activation patterns in brain circuits believed to promote nicotine withdrawal. Prior pre-clinical work, conducted largely in male rodents, has established that there are two major brain pathways that modulate the behavioral effects of nicotine withdrawal. These include the mesolimbic and medial habenula-interpeduncular nucleus (MHb-IPN) pathways. To assess …

Prediabetes Prediction Before Disease Onset Using Multimodal Health Data: A Machine Learning Approach, Luisa Veronica Gracia Mazuca

Open Access Theses & Dissertations

Prediabetes is a critical health condition that increases the risk of developing type 2 diabetes. The hemoglobin A1c (HbA1c) test diagnoses patients with prediabetes, but the disease has already caused metabolic alterations. Early detection is essential for timely interventions, and machine learning models offer a promising approach to identify prediabetic individuals through the analysis of biomarkers such as cytokines. We compared four classifiers-logistic regression, decision tree, random forest, and k-nearest neighbors - using cytokines (TNF-α, MCP-1, IL-1β, IL-6, IFN-γ), age, BMI, and waist-to-hip ratio (WHR). Models were evaluated using stratified 5-fold cross-validation and ROC-AUC. K-Nearest Neighbors (k-NN) achieved the highest …

What Do Captains And Lieutenants Believe To Be The Most Effective Professional Development For Fire Officers?, Claudia Haley

Open Access Theses & Dissertations

This dissertation investigates the professional development of fire officers through a blend of research methods and theoretical frameworks. The primary question driving this research is: "What do captains and lieutenants consider to be the most effective professional development for fire officers?" The framework employed to conduct this study was constructivist grounded theory. It was essential to consider the perspectives of those actively working in the industry when developing a professional development program for officers, as their expertise lends significant credibility to the study. The research utilized the Delphi method to identify and ensure the key elements that experts believe are …

Provenance Analysis Of Advanced Persistent Threats In Operational Technology Environments, Laura Aminta Guevara

Open Access Theses & Dissertations

Live vulnerability testing and penetration assessments of critical infrastructure are costly, complex operationally and, in many cases, unsafe to conduct directly against live systems, whether these are commissioned in-house and through third-party providers. For Operational Technology environments specifically, these constraints are further aggravated by the limited vendor support and inconsistent security patching available that characterize many industrial communication protocols. This significantly restricts the scope and feasibility of conventional penetration testing. At the same time, the increasing overlapping of OT systems with enterprise networks and the internet has expanded the attack surface of ICS infrastructure, making more pressing the need for …

The Mouse At The Border: Magic, Money, And Manufactured Identity, Ricardo Manuel Hinojosa

Open Access Theses & Dissertations

This thesis investigates the methods by which The Walt Disney Company constructs and negotiates representations of Latine, gender, and queer identities within contemporary animation, with a particular emphasis on Coco (2017), Encanto (2021), and Wish (2023). Through a critical and intersectional lens, this research posits that Disney strikes a balance between cultural specificity and global market appeal, often leading to representations that are visually elaborate yet narratively limited. Both Coco and Encanto showcase a significant engagement with cultural traditions and themes such as memory and generational trauma; however, they ultimately fall short of thoroughly addressing systemic issues like colonialism and …

Impact Of Campus Leadership Behaviors On Teacher Experiences With Burnout, Carmen Imai

Open Access Theses & Dissertations

Teacher burnout continues to be a significant concern in K-12 education, contributing to emotional exhaustion, decreased job satisfaction, teacher attrition, and negative impacts on student learning. While previous research has examined the causes and symptoms of burnout, less attention has been given to how teachers perceive the role of campus leadership in either mitigating or contributing to burnout experiences. The purpose of this qualitative phenomenological study was to explore how teachers who have experienced burnout perceive the role of campus administrators within that process. The study was guided by three research questions focused on teachers' experiences with burnout, perceptions of …

Exploratory Proxy Occupational Health Risk Assessment On Pm2.5 Exposure Among Outdoor Personnel At International Ports Of Entry, Josdell Maria Guerra Ruiz

Open Access Theses & Dissertations

Despite growing public health concerns on PM2.5 exposure and its respiratory health effects, no documented evidence has been found on the application of proxy methods to perform occupational health risk assessments for PM2.5 exposure among outdoor personnel. The purpose of this research study was to conduct a descriptive and predictive occupational health risk assessment for cancer and non-cancer respiratory health outcomes related to PM2.5 exposure among outdoor personnel at targeted international ports of entry (IPOE). A total of 61 samples were collected, for 24 hours, at two targeted IPOEs (every sixth day) over 12-month period. Samples included measurements on PM2.5 …

Three Essays On Consumers' Financial Decision-Making, Zakieh Kaveh

Open Access Theses & Dissertations

This dissertation examines how emerging financial and service technologies shape consumer decision-making and consumption behavior. Across three essays, this research investigates how technological features embedded in payment methods, self-service systems, and artificial intelligence influence consumers' psychological processes and behavioral outcomes in financial and marketplace contexts.

Microcosms & Warscapes, Heather J. Lathers

Open Access Theses & Dissertations

This poetry collection features sensory-centered writing and common objects, scenes, and interactions to authentically capture the multi-perspective and nuanced experiences of wartime. Detailed language is critical when poets become mouthpieces for those enduring war's pain. Focusing closely on items such as teacups, boots, bones, mud, rice, and rats creates a kind of intimacy not often found in war writing. Specific conflicts addressed include World War I, Vietnam, and The Cambodian Genocide. The poems here, in various forms and voices, aim to spotlight the lost, marginalized, abused, and forgotten-- the much-needed humanity war stories tend to neglect. Ultimately, these pieces seek …

Energy Poverty In U.S.-Mexico Border Communities: A Mixed-Methods Study Of Lived Experiences In El Paso And Laredo, Texas And Quantitative Patterns In Brownsville, Texas, Felipe Israel Martinez

Open Access Theses & Dissertations

Energy poverty in the U.S.-Mexico border region remains understudied, and much of the existing literature overlooks the lived experiences of households in this region. This thesis examines the lived experiences and coping strategies of residents in El Paso and Laredo, Texas, while also analyzing the sociodemographic variables associated with electric disconnection in Brownsville, Texas. The study employs a mixed-methods design that combines a quantitative ZIP code-year panel of electric disconnections in Brownsville, Texas from 2015 to 2024 with 14 qualitative interviews conducted with residents in El Paso and Laredo, Texas who had experienced electric disconnections or shutoff notices. These two …

Public Art And The Future Of Remembrance In Contested Spaces, Rebecca Ann Munoz

Open Access Theses & Dissertations

This dissertation examines the memorial landscape of El Paso, Texas as a contested site of public memory, cultural identity, and community representation. Situated at the U.S.-Mexico border, El Paso functions as a palimpsest of layered histories shaped by colonization, militarization, and ongoing negotiations of belonging. Drawing on memory rhetoric and composition studies, and art history, the paper raises critical questions about community engagement, representational equity, and the politics of visibility in public art processes. The paper ultimately calls for a deeper examination of the rhetorical strategies and institutional frameworks that shape memorial meaning-making at the local level, with broader implications …

Zero-Knowledge Proofs For Verifiable Machine Unlearning, Bidur Niroula

Open Access Theses & Dissertations

Machine unlearning aims to remove the influence of deleted data from a trained machine learning model. This is important because privacy regulations such as GDPR, CCPA, and PIPEDA give individuals the right to request the deletion of their personal data. Since unlearning can be expensive, a dishonest server may skip it or return an incorrect model and this motivates verifiable machine unlearning. Existing cryptographic approaches prove that the server executed a specific training or unlearning algorithm on the committed dataset, so the proof is tied to the algorithm's trajectory. Empirical verifiers avoid this cost but are known to be circumventable …

Linguistic Experiences And Identity Of Mexican-Origin New Teachers In A Rural District In The U.S.-Mexico Frontera, Patricia L. Ocana

Open Access Theses & Dissertations

This qualitative study is developed with the understanding that the linguistic experiences of Mexican-origin new teachers are situated in the socially constructed Institutional Discourses of U.S. schools in la frontera. Discourses that have historically marked Spanish-speaking identities as deficient while privileging English-only norms. Furthermore, the four maestras in this study are considered active agents in their development as bilingual educators and creators of counter-Discourses that affirm the linguistic and cultural identities of their emergent bilingual students. This study looks at Mexican-origin bilingual educators' vivencias as assets that shaped their journeys into the education profession and continue to shape their pedagogical …

Log Anomaly Detection With Parameter-Efficient Tiny Language Models: From Centralized Fine-Tuning To Privacy-Preserving Federated Learning, Isaiah Thompson Thompson Ocansey

Open Access Theses & Dissertations

System logs are a primary source of information for identifying faults, misconfigurations, and security incidents in computing infrastructure. As these logs grow in volume and complexity, manual inspection becomes impractical, and automated detection methods are needed. This thesis investigates how compact language models can be applied to the task of log anomaly detection under two operational conditions: when log data is centralized and when it is located at different data sites.

In the first part, we propose LogTinyLLM, which applies parameter-efficient fine-tuning through Low-Rank Adaptation and adapter-based techniques to adapt tiny language models for identifying contextual anomalies in log sequences. …

Discipline And Identity: Testimonios Of Queer Chicanxs, Marco Antonio Ortigoza Jr

Open Access Theses & Dissertations

Every year, students are pushed away from educational opportunities due to punitive practices. A system of policies and practices that increase the student's likelihood of formal social control, including the juvenile justice system, is often referred to as the school-to-prison nexus (STPN). Existing research suggests a disproportional number of students of color, as well as queer students, are harmed by disciplinary policies. The literature, however, does not fully address students' experiences, particularly queer Chicanxs. This study attempts to narrow that gap by highlighting the disciplinary experiences of queer Chicanxs. Additionally, this study explores how disciplinary experiences impacted their identity formation. …

Interprofessional Education For Teachers: Exploring Adult Learning Of Collaboration Through Cultural-Historical Activity Theory, Berenice Peralta Matus

Open Access Theses & Dissertations

This qualitative study examines how participation in an Interprofessional Education (IPE) simulation event influenced participants' understanding of collaboration. Grounded in Cultural-Historical Activity Theory (CHAT), the study examined how participants made meaning of collaboration, and the barriers to collaboration and interdisciplinary work both at their graduate program and their work environment. Data was collected in three phases and included semi-structured interviews with teachers before and after the event, observation fieldnotes and video of the event. I analyzed the data using CHAT as the interpretative conceptual framework for thematic interpretation of concepts such as mediation, contradictions, division of labor, and activity systems. …

Caregiver Experiences During Mealtime In Families Of Children With Feeding Disorders In The Borderland, Chyanne Reveles

Open Access Theses & Dissertations

This study examines the lived experiences of caregivers of children with pediatric feeding disorders (PFDs) in the Paso del Norte Region using interpretative phenomenological analysis (IPA). Pediatric feeding disorders require sustained medical, social, and emotional demand, often placing caregivers in complex decision-making roles. Understanding how cultural beliefs and context shape caregiving practices is essential to improving services provided by speech-language pathologists and other service providers. The qualitative research approach used facilitated the discovery of themes surrounding the lived experience of the caregivers of children with feeding disorders. Semi-structured interviews were conducted via Zoom with caregivers residing in the U.S.-Mexico border …

Fatal Remedies: How France Undermined Its Own Objectives In Algeria, 1954-1962, Elizabeth Mae Tornabene

Open Access Theses & Dissertations

While much of the best-known literature on the Franco-Algerian War has emphasized insurgency, counterinsurgency, and the grievances of the colonized, this thesis takes a broader, historical and public administration approach by analyzing the relationship between the development and implementation phases of government and military policies and the unintended, sometimes fatal, outcomes that followed. Although it does this from the perspective of policymaking in the country that is trying to maintain control over its distant territory, it has implications for those interested in maximizing resistance to these policymakers.

By conducting a structured, focused comparison of a typical case across three theories …

Understanding Gambling Behavior Among Hispanic College Students: The Role Of Attitudes, Norms, Self-Efficacy, And Acculturation, Joshua Torres

Open Access Theses & Dissertations

Gambling has become increasingly accessible and socially normalized among young adults, particularly through mobile platforms and the expansion of legalized sports betting. Hispanic college students may be at heightened risk for gambling-related harms, given evidence of elevated rates of problem gambling, comorbid mental health concerns, and underrepresentation in empirical research. Cultural factors, such as acculturation, may further influence engagement in gambling behaviors and susceptibility to negative outcomes. Guided by the Theory of Planned Behavior, the present study investigated the relationships between gambling injunctive norms, gambling attitudes, and gambling self-efficacy across three outcomes: gambling frequency, problem gambling severity, and gambling intention. …

Mitigating Clay Contamination In Field Sands To Prevent Early Age Failure In Asphalt Mixtures, Suhail Rashid Vaid

Open Access Theses & Dissertations

Field sands are commonly incorporated into hot mix asphalt (HMA) pavements due to their availability and cost-effectiveness compared to crushed aggregates, primarily to enhance workability. Their usage, however, is generally restricted to no more than 10% of the total aggregate content because of concerns regarding their potential negative influence on pavement performance. A major concern is the presence of deleterious clay particles, which can substantially affect the behavior of asphalt concrete (AC). This research explored how clay minerals influence AC performance by examining Superpave mixtures and characterizing both clay and sand properties. The methylene blue value (MBV) was employed to …

Penalty Approach To Constrained Optimization Problems In Water Reservoir And Energy Generation Management, Edwin Horacio Trejo

Open Access Theses & Dissertations

The growing demand for resilient and sustainable energy generation has driven interest in Hybrid Floating Photovoltaic-Hydropower (HFPVH) systems. Operating these systems effectively requires making water release decisions that satisfy physical and regulatory constraints while maximizing energy production. Prior work by Vega (2024) developed a Dynamic Outlier Filter Long Short-Term Memory (DOF-LSTM) architecture for forecasting reservoir release patterns. That predictive work is valid and addresses an important component of the HFPVH decision pipeline. However, the constraint system in that work operates externally to the learning process, and the behavior of penalty-based constraint enforcement had not been studied independently in this context. …

Bridging Leadership: An Autoethnographic Inquiry Into The Governance And Decision-Making Experience Of A Latina Rural School Superintendent, Rosa Isela Vega-Barrio

Open Access Theses & Dissertations

This autoethnographic study, Bridging Leadership: An Autoethnographic Inquiry into the Governance and Decision-Making Experience of a Latina Rural School Superintendent, examines how governance and leadership are experienced and enacted through the sustained relationship between a superintendent and a school board president in a rural border district along the U.S.-Mexico border, the study explores how power, trust, reciprocity, role expectations, and ethical tension evolve within this leadership partnership over time. Grounded in Relational Leadership Theory, Social Exchange Theory, and Role Theory, the study conceptualizes leadership as a relational and contextually embedded process rather than a function of positional authority. Using autoethnography …

Molecular Mechanisms Of Pfas Induced Protein Dysfunction: Implications For Neurodegenerative Risk, Daisy Lee Wilson

Open Access Theses & Dissertations

Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants with widespread human exposure and well-established links to adverse health outcomes. However, despite increasing epidemiological and experimental evidence, the molecular mechanisms underlying PFAS-induced neurotoxicity remain incompletely defined. This dissertation investigates PFAS toxicity across biological scales, integrating protein biophysics with neuronal cell models to elucidate pathways relevant to neurodegeneration. At the molecular level, we demonstrate that PFAS disrupts the structure and function of globular proteins, including the impairment of α-lactalbumin's calcium-binding capacity and of β-lactoglobulin's retinol binding, through concentration-dependent conformational destabilization. By applying these findings to a neuronal model, we show that …

Effective Prediction Of Martensite Start Temperature By Hybrid Machine Learning And Ethical A.I. In Materials Science, Agniprava Banerjee

Open Access Theses & Dissertations

The martensite start temperature Ms governs heat treatment design and mechanical property development in martensitic steel alloys. Accurate prediction of Ms from chemical composition alone would accelerate alloy development, yet existing empirical equations lack accuracy for multi-component steels and purely data-driven models provide no physically principled behavior outside their training domain. This dissertation develops a hybrid machine learning-physics framework for predicting Ms in steel alloys from composition. The MAP Cambridge dataset (1,020 cleaned records, 15 alloying elements) is processed through a five-stage cleaning pipeline and a 21-feature physics augmented representation, including the Ghosh-Olson Ms thermodynamic prediction as an explicit feature. …

We Are Still Lipan: Identity Erasure, Settler Colonialism, Historical Memory And The Persistence Of The Non-Reservation Lipan Apache, Freddy Cabral

Open Access Theses & Dissertations

This dissertation challenges the long-standing historical narrative that the Lipan Apache disappeared in the late nineteenth century. Instead, it argues that the non-reservation Lipan Apache survived through strategic adaptation, mobility, kinship networks, and cultural continuity across the United States-Mexico borderlands. By examining the Lipan experience under Spanish colonial rule, Mexican governance, the Republic of Texas, and the State of Texas, this study demonstrates that shifting political regimes consistently pursued Indigenous land, labor, and subordination through structures of settler colonialism and racial hierarchy. Using the frameworks of settler colonialism, white supremacy, genocide studies, oral history, and autoethnography, this dissertation shows how …

Hvsr-Based Resonance Analysis And Fault Zone Characterization In The El Paso Region, Alexandro Dominguez

Open Access Theses & Dissertations

Horizontal to Vertical Spectral Ratio (HVSR) analysis offers an efficient method for characterizing near-surface structure, resolving sediment thickness, and identifying fault-controlled basin geometry in regions with strong impedance contrasts. This study applies HVSR techniques to continuous ambient-noise recordings collected across the El Paso region, a tectonically active segment of the southern Rio Grande Rift where accurate subsurface mapping is essential for seismic hazard assessment. Ambient-noise windows were processed, spectrally smoothed, and stacked to obtain stable HVSR curves, from which fundamental resonance frequencies and corresponding sediment-thickness estimates were derived. Spatial patterns in these resonance frequencies reveal pronounced basin asymmetry, abrupt lateral …

From Covid-19 To Influenza: Transforming Public Health Surveillance Through Freeze-Drying Innovations, Rui Dong

Open Access Theses & Dissertations

Public health surveillance increasingly relies on wastewater-based epidemiology (WBE) as a non-invasive, community-level early warning system for infectious diseases like COVID-19 and influenza. However, detecting minute viral concentrations in complex wastewater matrices remains a significant analytical challenge. Traditional concentrating methods, such as ultrafiltration, are limited by high performance variability and significant viral signal loss due to necessary pretreatment steps, such as pre-clarification, which inadvertently discard solid-associated viral fractions. To address these limitations, this dissertation introduces and evaluates freeze-drying as a novel, pretreatment-free concentrating method for wastewater viral surveillance. By sublimating water, freeze-drying uniquely retains both liquid and solid-phase viruses within …

Development Of A Simulation-Driven Evaluation System For Foreign Objects In Aircraft Structures, Daniela Garcia

Open Access Theses & Dissertations

This thesis investigates the use of simulation-driven methods to evaluate the behavior and potential impact of foreign objects within aircraft structures. Foreign Object Damage (FOD) remains a major concern in aerospace safety, as small components unintentionally left inside aircraft compartments can create uncertainty regarding their effect during flight. Although current inspection methods can detect the presence of foreign objects (FOs), they often cannot determine whether these objects pose a significant structural risk, leading to conservative maintenance decisions. To address this limitation, this work develops a simulation-based framework that integrates Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) to evaluate …

Paucilactobacillus Wasatchensis Gas Production In Cheddar Cheese Through Symbiotic Amino Acid Metabolism With Lactococcus Lactis Starter Cultures, Niharika Mishra

All Graduate Theses and Dissertations, Fall 2023 to Present

Cheese is popular for its rich sensory notes and desirable physical attributes; however, the late blowing gas defect in cheddar cheese disrupts its appearance and can undermine its commercial value, for example if the late gas defect is severe, the block can crumble upon cutting, increasing cutting losses from 10% (non-defective) up to 50% (Donnely et al., 2014).

Paucilactobacillus wasatchensis cannot survive pasteurization (McMahon, D. J., et al., 2020); therefore, it enters the cheese as a contaminant during the cheesemaking process. Cheesemaking occurs in three stages: (1) curdling of milk by acidification through starter cultures, (2) separation of curd from …