Digital Commons Network^™

Bounding The Average Kissing Number, Including New Bounds For Three-Dimensional Binary Sphere Packings, Mark William Bockhaus

Theses and Dissertations

The average kissing number is defined as the supremum over all sphere packings of the value: two times the number of tangencies divided by the number balls in the packing. In this paper, we present a survey of the literature about bounding the average kissing number, beginning with the first non-trivial results, through the most up-to-date bounds. We then turn our focus to binary sphere packings: those which contain spheres of two different radii. We improve upon known bounds for the average kissing number for binary sphere packings in three-dimensions and find exact bounds for many packings.

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. …

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 …

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 …

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 …

Intersecting Identities, Social Support, Multiple-Minority Stress, And Health Outcomes Among Latinx Lgbtq+ Adults, Amanda Lamas

Theses and Dissertations

Latinx LGBTQ+ adults experience poor health due to exposure to intersectional discrimination; however, they also possess protective factors to cope with these stressors. This study explored the associations and interactions of identity affirmation (ethnic, American, LGBTQ+), identity outness, perceived social support, LGBT-POC microaggressions, and health among LGBTQ+ Latinx adults. Correlational analyses and regression models controlling for covariates showed that American and ethnic identity affirmation, perceived social support, and identity outness were positively associated with health, and LGBT-POC microaggressions were negatively associated with health. LGBTQ+ identity affirmation was directly correlated with mental health, but not in the regression model. Identity affirmation …

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 …

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 …

Investigating The Ability Of Foxo1 To Maintain Stem Cells, Stella Aime Rios

Theses and Dissertations

Forkhead box O (Foxo) transcription factors are key regulators of stem cell identity and tumor aggressiveness. Prior work from our group and others demonstrates that Foxo factors maintain stem-like states across diverse biological systems; however, the mechanisms by which Foxo1 suppresses differentiation remain poorly defined.

Using C2C12 myoblasts as a model, we investigated whether Foxo1 preserves stem-like programs through regulation of the nuclear pore protein Nup210. RNA interference was used to generate Foxo1 knockdown cells, followed by qRT-PCR, RNA-sequencing, and fluorescence microscopy. Transcriptomic analysis revealed widespread gene expression changes involving metabolic, mitochondrial, and transcriptional pathways. Notably, Nup210 expression was significantly …

Morphological Evolution And Sediment Budget Of A Flood-Tidal Delta On The Rio Grande Delta Plain: Bahia Grande, Texas, Usa, Aleen Pertuz Paz

Theses and Dissertations

The Isabel Delta is a recently formed flood-tidal delta within the restored Bahia Grande system on the Rio Grande Delta Plain, Texas, USA, where renewed tidal connectivity has created conditions for rapid sediment buildup and landform evolution. This study quantified morphological changes from 2008 to 2025 using satellite imagery. It assessed sediment retention by comparing the effective sediment discharge required to reproduce observed delta growth with field-based estimates of sediment supply derived from channel hydrodynamics, cross-sectional area, and suspended sediment concentration. The delta expanded steadily throughout the study period, with increases in bar, channel, and total surface area, and an …

Parasites Of Meaning: When Interpretation Becomes Infection, Kimberly Medrano

Theses and Dissertations

This thesis examines the impulse to seek moral certainty in morally ambiguous first-person confessional narratives and argues that such certainty is unnecessary. When confronted with narrators whose moral positions remain unclear, readers often project their own moral frameworks onto the text to place the narrator within specific moral binaries. This impulse reveals the reader’s discomfort with ambiguity. This study analyzes the confessional narration, No Longer Human by Osamu Dazai. The thesis will explore how its confessional narrator resists moral clarification. Drawing on Friedrich Nietzsche's critique of moral binaries and J. Hillis Miller’s concept of the “Critic as Host,” this thesis …

Teaching At The Ai Crossroads: Educators’ Experiences, Ethics, And Practice In Pharmacy Education, Crystal Marie Zuniga

Theses and Dissertations

Artificial intelligence (AI), including emerging generative AI tools, is increasingly influencing healthcare workflows and reshaping expectations for workforce preparation. Pharmacy technician education must respond to these shifts while maintaining academic rigor and prioritizing patient safety, ethical practice, and professional accountability. This qualitative study examined pharmacy educators' perspectives on the integration of AI within the Pharmacy Technician Program at Southern Valley College, with attention to how educators interpret AI’s relevance, risks, and instructional implications in pharmacy education.

Data collection included one focus group and individual semi-structured interviews with four pharmacy educators with diverse professional experiences in pharmacy practice and education. Data …

Sub-Ghz Propagation Along Freight Trains For Wireless Onboard Communications, Dario Hinojosa

Theses and Dissertations

With the increasing length of freight trains, maintaining reliable wireless communication for onboard sensors has become increasingly challenging. Sub-GHz communication bands are a promising solution due to their long-range capability and suitability for rural railway environments. This study analyzes radio wave propagation around freight railcars to evaluate path loss and determine how antenna polarization affects wireless communication performance.

Time-domain full-wave electromagnetic simulations were performed using simplified railcar models and later validated through field testing using a vector signal generator, vector network analyzer (VNA), and spectrum analyzer. Various antenna polarization configurations were evaluated within the Sub-GHz Long Range (LoRa) frequency band …

Accurate Polyp Segmentation With Visual Mamba, Diego Adame

Theses and Dissertations

Medical image segmentation is a fundamental task in computer-aided diagnosis because it enables precise delineation of anatomical structures and pathological regions from clinical images. While convolutional neural networks and Transformer-based models have achieved strong performance on many medical segmentation benchmarks, CNNs struggle to model long-range dependencies and Transformers often incur high computational complexity for high-resolution medical images. Recently, state space models have emerged as an efficient alternative for dense prediction tasks due to their ability to capture long-range dependencies with linear complexity. However, existing Mamba-based segmentation models still rely on pixel-wise raster scanning that disrupts spatial locality and use simple …

Writing And Witnessing Ourselves Into Being: Testimonios Of A Chicana Educator And Latine Students For Social Justice In A Writing Course At A Hispanic Serving Institution, Amy Montoya

Theses and Dissertations

A qualitative study of first-year writing students at a Hispanic Serving Institution (HSI) sought to understand the extent to which the practice of writing testimonios transformed how students constructed their sense of identity for social justice. Guided by the research question: How does the practice of writing testimonios in a writing course at an HSI shape faculty and student identity for social justice? This qualitative study analyzed the lived experiences of three former Latine female undergraduates and the researcher in a co - participatory testimonio methodology study. Grounded in the conceptual frameworks of decolonization (Mignolo & Walsh, 2018; Paraskeva, 2013) …

The Application Of Natural Language Processing Towards Auditing Of Unstructured Data: A Design Science Approach, Dennis K. Amoatey

Electronic Theses and Dissertations

Financial auditors must manually review large volumes of unstructured text that may include contracts, internal policies, footnotes, and journal entry descriptions. This time-intensive process introduces risk of human error and inconsistency. Despite advances in automation, no systematic approach exists for applying Natural Language Processing (NLP) to this problem at scale. Using a design science approach, this study develops a framework that demonstrates how NLP techniques can be incorporated across key phases in the audit process, including planning, internal controls evaluation, evidence gathering, and reporting. Initial evaluation through expert feedback had a mix of responses. While some argued difficulty with data …

Branding The Protector And Helper: How The U.S. Army National Guard Presents Itself In Humanitarian Outreach, Aaron Otoo Acromond

Electronic Theses and Dissertations

This study examines how the United States Army National Guard constructs and communicates its humanitarian identity during domestic disaster response through official social media. Addressing limited scholarship on how hybrid military institutions frame their roles in domestic crises, the research applies qualitative content analysis to visual and textual posts from official Facebook and Instagram accounts during three disasters: Hurricane Ian (2022), the Hawaii Wildfires (2023), and Hurricane Helene (2024). The analysis identifies three communication themes: operational preparedness and technical capacity, humanitarian assistance to affected civilians, and collaboration with civilian agencies. These narratives portray the National Guard as a professional and …

Building Services Engineering March/April 2026

Building Services Engineering

No abstract provided.

Political Legacies Of Malcolm X, Sumair Ahluwalia

Theses

This study explores the ways in which Malcolm X’s legacy has been co-opted by various institutions and actors, including, but not limited to, politicians, historians, the general public, the federal government, and other commentators. As a result of this co-optation, Malcolm’s revolutionary ideals have been diluted or sanitized in the years since his assassination in 1965. Different approaches have been utilized to reframe Malcolm’s legacy, which include associating him with American liberalism, framing his arguments at the end of his life as markedly less radical, and external interference with popular works about Malcolm, including The Autobiography of Malcolm X. Additionally, …

Evaluation Of Otolith Microchemistry For Identifying Walleye Stocked As Fry Or Fingerlings, Joshua Fluur

Theses

Walleye (Sander vitreus) is a popular sport fish whose populations are often supported by maintenance or supplemental stocking, with most fish stocked as fry, fingerlings, or advanced fingerlings. Evaluation of stocking efficacy is important to inform decisions regarding fish stocking rates and sizes and allocating hatchery fish to locations where maintenance or supplemental stocking is most needed. Several types of artificial tags or marks have been proven useful in the identification of stocked fish, but they often have various drawbacks. Natural chemical markers in otoliths offer several advantages compared to conventional tags or marks and can be used to identify …

American Industry And Soviet Blood: U.S.-U.S.S.R. Collaborations During The Interwar And Wartime Years, Evan Banaszewski

History

This project will examine the connections between American corporations and the Soviet state from the late 1920’s through WWII. In particular, this project will focus on ventures undertaken by said corporations towards the modernization of Soviet industrial might, including, but not limited to, Ford-built automotive plants, Albert Kahn-designed factories, and General Electric-built hydroelectric grids. These ventures not only helped the Soviets transform a historically agricultural society into an industrial one but also enabled the rapid conversion of peacetime infrastructure into hubs of wartime production. The project then situates these private indirect contributions alongside the direct aid provided by the American …

Secondary Traumatic Stress Among U.S Army Active-Duty Social Workers., Jennifer Frazier

Doctor of Social Work Capstone Projects

The purpose of this study was to explore Secondary Traumatic Stress (STS) and its relationship with functional impairment among U.S. Army active-duty social workers. These social workers practice in a uniquely demanding environment, balancing constant exposure to service members’ and families’ trauma narratives as well as organizational mandates. A mixed-method, exploratory, cross-sectional design was used, with data collected via an online survey. Resulting in a sample of fifteen, recruited via a Facebook group for Army Social Workers. Analysis focused on patterns and associations rather than causal conclusions, due to the sample size and design, and should be interpreted cautiously. Patterns …

Hearing Northern New Mexico's Silenced Voices: Exploring Intersectionality And Allyship., Cheri Loggains

Doctor of Social Work Capstone Projects

Hearing Northern New Mexico’s Silenced Voices: Exploring Intersectionality & Allyship Cheri Loggains, MSW, LCSW March 27, 2026 Oversimplified social constructs of identity and power were intentionally used in Northern New Mexico (NNM) by White settlers to perpetuate oppression. This oversimplification contributes to a false narrative of New Mexico centering White experiences and creating a hegemonic system of power. The repercussions of such acts are under new scrutiny, which calls out performative allyship. However, performative allyship is scarcely studied in current literature, even though it is a natural microcosm for examining the relational dynamics of power. The current literature also implies …

Systemic Barriers To Behavioral Health Treatment Access For Undocumented Immigrants And Implications For Recidivism In California, Devina I. Aparicio

Capstone Projects and Master's Theses

Undocumented individuals face significant barriers to accessing mental health and substance use treatment, contributing to increased recidivism rates in Monterey County, California. The purpose of this capstone project was to identify the specific barriers undocumented immigrants encounter when seeking these services and to inform strategies that improve access and reduce recidivism. This project focused on clients served by the Monterey County Public Defender’s Office of Holistic Defense. A qualitative approach was used, incorporating research and interviews with community providers, including the Monterey County Public Defender’s Office of Holistic Defense, Sun Street Centers, Monterey County Behavioral Health, and the County of …

Integrating Organizational Theory In Student Employee Development Across Dispersed Workplaces, Anica C. Chesnut

Master of Public Administration Capstone Papers

Managing and developing staff at university residential desks presents unique challenges. One challenge is the complexity of supervising student employees while allowing them the opportunity to grow as well. Another challenge is the dispersed nature of residential desks across a university campus. Satellite desks present a difficulty to maintain community, a positive work culture, continuity of expectations, and procedures. Several organizational theory frameworks can be directly applied to the organization in order to reduce challenges. This capstone paper utilizes literature review and examination of current practices, to provide context of current inefficiencies while also critically analyzing pain points within the …

Efficacy Of Implicit Bias Training Within The Hazel Park Police Department, Luke Londo

Master of Public Administration Capstone Papers

Among the many desired outcomes for uniformed police officers who undergo implicit bias training is a reduction in the level of discriminatory conduct related to such biases. Current research on the subject offers mixed results, and nearly all existing studies do not provide an empirical measurement of efficacy or other outcomes beyond officer sentiment. This case study examines and measures the impact of implicit bias trainings, which is a requirement for officers within the Hazel Park Police Department in Michigan, prior and subsequent to certification by using raw and sustained complaints of discriminatory conduct allegedly perpetrated by Hazel Park police …