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Processing, Characterization And Performance Of Ceramic Liners For Hydrogen Gas Turbine Engines, Fahim Faysal

Graduate Studies Theses and Dissertations 2026

Advanced ceramics and ceramic matrix composites (CMCs) are known for their endurance at high temperatures. This study investigated the fabrication and testing of two material systems: silicon carbide nitride (SiCN) reinforced with yttria-stabilized zirconia (YSZ) fiber manufactured through polymer infiltration and pyrolysis (PIP), and 3D-printed alumina (Al₂O₃) ceramics. The CMC thermal stability at high temperatures was explored through a hydrogen torch test. The CMC surface could withstand a temperature of 1,400°C for 10 minutes during the torch test. Furthermore, the internal surface of a hydrogen combustion chamber was coated with CMC to assess its applicability as a protective barrier against …

Temperature And Speciation Measurements Of Aluminum-Laden Detonation Flows Via A Three-Color Wavelength Modulation Spectroscopic Sensor, Marc B. Etienne

Graduate Studies Theses and Dissertations 2026

Tunable diode lasers are widely used and are known to be great options for continuous wave lasing applications. Because of their stability and spectral selectivity, they have become an important diagnostic tool for modern combustion research. Previous combustion research, particularly those focused on solid and hybrid rocket systems, have shown that the interaction of aluminum with a reacting flow can greatly affect the dynamics and the thermochemical properties of the surrounding gas, therefore understanding the effects of aluminum-laden flows is critical for the advancement of these propulsion systems. However, due to the high degree of optical interference, high temperatures, and …

Cylinder Wake Stability Effects Of Passive Forebody Modification And Active Harmonic Actuation, Matt Duran

Graduate Studies Theses and Dissertations 2026

This dissertation investigates the manipulation of global and three-dimensional instabilities in the wake of a circular cylinder through two separate flow control methods. This study first focuses on the influence of attached leading edge forebodies as a form of passive flow control designed to introduce upstream streamline curvature, where the curvature takes the form of a concave and convex case. We demonstrate that for both cases this induced curvature significantly modifies the primary instability, which suppresses periodic vortex shedding (Von Kármán vortex street). We found an increase in critical Reynolds number of 56.6 and 60.1 for the concave and convex …

An Examination Of The Impact Of School Accountability On Data-Driven Decision-Making By Florida Educational Leaders, Emily Galucho

Graduate Studies Theses and Dissertations 2026

This mixed-methods study examined how accountability influences educational leaders' data-driven decision-making (DDDM) practices in Central Florida. Grounded in the principal-agent and consequential accountability frameworks, the study investigated demographic predictors, implementation challenges, and the role of accountability in DDDM. Educational leaders completed online surveys measuring DDDM perceptions across five subscales and responded to open-ended questions. The responses were analyzed through multiple regression, correlation, and thematic coding.

Accountability emerged as DDDM's strongest predictor, significantly exceeding demographic and organizational variables. Five implementation challenges were identified: Data Literacy Gaps, Data Timeliness Issues, Resource Constraints, Implementation Fidelity, and Systemic Barriers. Accountability demonstrated dual effects: many …

I, Cock-A-Doodle-Do: Reclaiming Masculinity Through Queer Joy And Humorous Self-Exploration, Nelson J. Garcia

Graduate Studies Theses and Dissertations 2026

I examine the contemporary norms of masculinity. My research wrestles with ultimately unresolvable stereotypes and imagery influencing current masculine behavior. I unearth queer potential through the physicality and behavior of the stereotypical “man’s man”. I infuse my own queer identity into my studio practice with an emphasis on humor and joy to subvert traditional models of male performance. This process drives self-exploration that allows me to personally respond, react, be directed, and redirected by the interactions between queerness and masculinity. Masculine and queer representations across various media, such as film, music, and television, historically and continuously inform restrictive cultural norms. …

Contested Air: Politics, Prejudice, And Radio Broadcasting In New York State, 1925-1928, Sebastian Garcia

Graduate Studies Theses and Dissertations 2026

This thesis examines the intersection between radio broadcasting as the "new media" of the 1920s and American political culture of the period, using New York Governor and 1928 Democratic presidential candidate Alfred E. Smith as a case study. Smith entered 1925 as a political lone wolf and left the year as a triumphant victor set to take the presidency. Building on the work of Smithian scholars, this thesis illuminates how Smith’s radio use remained central to this political transformation. Smith found in radio an apt space to bypass Republican opposition and mobilize the body politic through direct engagement, which, in …

Privacy-Preserving Matrix Computations Using Homomorphic Encryption With Applications In Ai, Yang Gao

Graduate Studies Theses and Dissertations 2026

Homomorphic encryption (HE) enables computation directly on encrypted data, offering strong privacy guarantees for sensitive applications. Despite its promise, the practical adoption of HE remains limited by high computational overhead and inefficient support for fundamental operations such as matrix multiplication, sparse computation, and secure retrieval.

This dissertation addresses these challenges by developing efficient and scalable methods for privacy-preserving computation under HE. First, it presents HEGMM, a framework for secure general matrix multiplication that reduces redundant computation and improves efficiency through optimized data layouts. Second, it introduces the Compressed Sparse Sorted Column (CSSC) format for sparse matrix-vector multiplication (SpMV), enabling efficient …

Carbaryl Exposure Alters Gut Microbiome Composition Without Affecting Morphometrics In Eastern Purple Martin (Progne Subis Subis) Nestlings, Stephanie A. Gaspar

Graduate Studies Theses and Dissertations 2026

Eastern purple martins (Progne subis subis) rely entirely on human-provided nesting structures throughout their breeding range in eastern North America. To control haematophagous mites that commonly infest these nests, many landlords apply the carbamate insecticide, carbaryl. Although effective at reducing ectoparasite populations, carbaryl exposure may have unintended effects on the gut microbiome, growth, and condition of developing birds. This study examined the effects of carbaryl exposure on gut microbial communities and morphometric condition in wild nestlings. Nests were experimentally treated with carbaryl, and nestling morphometrics and fecal microbiomes were compared between treated and untreated groups at 18 days …

Emotional Support Friends: Creating Social Impact Through Art And Polite Humor, Kenyari Gil Rosario

Graduate Studies Theses and Dissertations 2026

This thesis aims to provide new imagery to the conversation of mental health and neurodivergence. It does this through forms of soft sculpture, digital paintings, marker drawings, and community murals. Inspired by the practices of Keith Haring, iconographic characters are used to portray common struggles and coping habits of mental conditions in an endearing light. With the goal of social impact, this project is affiliated with the non-profit organization Providing Autism Links and Support (P.A.L.S). This partnership has given the community an opportunity to share their compassion through art and donations and uses art as a means of social impact …

Physical Activity And Health Outcomes In Children With Dyslexia During Summer Versus School Months, Tina J. Glatz

Graduate Studies Theses and Dissertations 2026

Children in the United States continue to experience rising rates of overweight and obesity. Children with learning disabilities are twice as likely to have obesity than typically developing peers, partly due to difficulties with motor skills and behavior regulation. The purpose of this study was to examine and compare differences in health outcomes and physical activity (PA) during summer versus school months in children with dyslexia, using a within- subject study design.

At three timepoints (May, August, December 2025), children’s height, weight, and fitness were measured via a portable stadiometer, dual-frequency foot-to-foot bioelectric impedance device, and Progressive Aerobic Cardiovascular Endurance …

Increasing Actuation Authority And Bandwidth For Aeromechanics Testing: A Piezoelectric-Based Approach, Sydney A. Giannuzzi

Graduate Studies Theses and Dissertations 2026

Flutter in turbomachinery poses significant risks to aerospace systems, requiring accurate identification of flutter boundaries to ensure operational safety. Traditional binary “flutter / no flutter” testing methods provide limited data without error margins. Aeromechanical Identification Methodology (AIM) offers a safer alternative by mapping aeromechanical damping across operational conditions using non-contact excitation. However, current AIM actuators are constrained to excitation frequencies below 500 Hz, limiting their effectiveness and applicability. To bridge this gap, this research analyzed and validated performance of a novel piezoelectric-based oscillatory flow injection valve (NOVA) designed to deliver high-bandwidth, high-authority actuation for expanded flutter boundary mapping.

NOVA was …

Entre Dos Mundos: A First-Generation Cuban American's Journey Through Identity And Memory, Alessandra M. Gonzalez

Graduate Studies Theses and Dissertations 2026

ENTRE DOS MUNDOS (translated as “between two worlds”) explores the complexities of growing up as the eldest daughter in a Cuban American immigrant family and the tensions of navigating life between cultures. Set in Miami, the collection blends lyrical and prose poetry to examine cultural identity, diaspora, intergenerational memory, and the emotional landscape of young adulthood. Through personal narrative and historical context, ENTRE DOS MUNDOS traces the speaker’s coming-of-age amid the inherited stories of her family’s escape from Cuba and the lingering effects of displacement. The section “Yo” focuses on the psychological challenges of adolescence and early adulthood, reflecting on …

Ecological And Evolutionary Divergence Of A Shared Sympatric Color Polymorphism In Paracirrhites Hawkfish, Samuel Greaves

Graduate Studies Theses and Dissertations 2026

Color polymorphism provides a tractable window into how selection, gene flow, and ecology interact to maintain phenotypic diversity and initiate divergence. I investigate the ecological and genomic basis of sympatric light and melanistic morphs in two reef hawkfishes, Paracirrhites arcatus and P. hemistictus, across Guam and Hawai‘i. This study aims to determine whether the color morphs of these hawkfishes are a stable polymorphism or have begun the process of ecological speciation. For P. arcatus revealed substantially lower density on Guam (0.086 ind/m²) than reported for Hawai‘i (0.292 ind/m²) and a strong skew away from the melanistic morph on Guam …

Improvisational Theatre And Theatre Of The Oppressed: Fostering Growth In Myself And Beyond, Leigh S. Green

Graduate Studies Theses and Dissertations 2026

This thesis examines how improvisational theatre and Augusto Boal’s Theatre of the Oppressed function independently and how these practices have shaped me as both an artist and educator. Having grown up with improvisation and continued working professionally in performance and education, I have observed how it creates conditions that support development. Guided by a qualitative practice-as-research methodology, in which my own artistic and pedagogical practice serves as both site and subject of inquiry, this study explores three central questions: How does improvisational theatre contribute to youth development? In what ways can Theatre of the Oppressed deepen or reshape improvisation’s developmental …

Reflection In Still Waters: Generative Ai's Production Of Language, Jonathan D. Hawks

Graduate Studies Theses and Dissertations 2026

Language is a conceptual process of meaning-making as well as a social construction as defined by Saussure, Bakhtin, and Lacan. Large Language Models (LLMs) engage with neither process and instead present language as a finished and consumable product which undermines its fundamental aspects. The difference between representing language through probability and its structural components instead of its more inherent qualities is not a pointless distinction. This paper utilizes Narcissus as a central metaphor to show how people misread the outputs of LLMs as language which imparts to those reflected words meaning on par with our own conceptualizations of reality. People …

Centered A Story Of Family And Compassion In The Face Of Parkinson's Disease, Savannah Hill

Graduate Studies Theses and Dissertations 2026

Centered is a three-dimensional (3D) animated short film that explores the topic of parental illness and how families must respond with compassion and adaptability when loved ones face mental or physical challenges. The story is inspired by the director’s own experience with her father’s diagnosis of Parkinson’s Disease when she was in high school. The main characters, a father and daughter, must navigate the father’s changing needs after his diagnosis by prioritizing their connection and adapting to his new physical challenges. In the film, they do this through the creation of pottery. The imperfect, handmade design style of the film …

Governing Harm: Three Essays On Anti-Lgbtq+ Legislation In The United States, Kathryn Hickey

Graduate Studies Theses and Dissertations 2026

In the United States, over 140 state bills were passed between 2014 and 2024 that directly targeted the lives of LGBTQ+ individuals. Drawing on administrative evil and the minority stress model, this dissertation demonstrates how policy environments that normalize discrimination through the passage of anti-LGBTQ+ legislation can lead to devastating consequences. Using a three-essay format, the first study conducts a qualitative content analysis of state level anti-LGBTQ+ laws passed between 2015 and 2024 to identify how administrative evil is woven into the language of the legislation. The results of this analysis show these laws systematically dehumanize LGBTQ+ individuals, restrict their …

If Your Muses Don't Hate You..., Hannah Howe

Graduate Studies Theses and Dissertations 2026

If Your Muses Don’t Hate You… interrogates a speaker who feels she lacks the tools needed to properly assess trauma and grief. This collection follows the speaker as she delves into obsessive analysis of self, often using metaphysical lenses as methods of comprehension. Each section explores a facet of the subject’s identity, and examines whether her heartache is self-inflicted, preordained, or both. Six of the seven sections provide the reader with imaginative interpretations of the speaker’s natal chart, allowing the reader the opportunity to analyze alongside the speaker. The first half of these sections present the speaker struggling to separate …

Two Essays On Geopolitical Risk And Investment Decisions, Jie Hu

Graduate Studies Theses and Dissertations 2026

My first essay studies how global institutional investors adjust cross-country equity allocations in response to rising geopolitical risk. Using quarterly equity holdings of institutional investors over 1997–2023, combined with news-based global and country-specific geopolitical risk indices, I find that following increases in geopolitical risk within a country, foreign institutions actively reduce their allocations in that country and the nearby region. Elevated global geopolitical uncertainty triggers both a flight-to-home response toward domestic equities and a flight-to-safety effect toward U.S. equities. Investor responses are heterogeneous: Institutions with higher geopolitical risk sensitivity respond more aggressively, whereas larger or better-performing hedge funds often maintain …

Benchmarking And Advancing Heterogeneous Data Reasoning With Large Language Models, Yebowen Hu

Graduate Studies Theses and Dissertations 2026

Large language models (LLMs) increasingly face complex real-world tasks requiring complex reasoning over heterogeneous inputs, including text, numbers, and structured data. This dissertation first investigates the capability boundaries of LLMs under such scenarios. Through the MeetingBank and SportsMetrics benchmarks, we show that while LLMs exhibit linguistic fluency, they struggle with factual accuracy, information density, and quantitative cross-referencing in meeting summarization and sports analysis. Using DecipherPref, a pair-wise evaluation framework grounded in the Bradley-Terry-Luce model, we further probe LLMs' inherent preferences for information-rich and lengthy inputs, and we identify critical deficiencies in financial decision-making through DeFine, where models lack precise insight …

Fear, Uncertainty, And The Chilling Effect: A Case Study Of Organizational Racialized Omission, Annie Jones

Graduate Studies Theses and Dissertations 2026

Florida passed House Bill 7 in 2022 and Senate Bill 266 in 2023, both policies that restrict how race and racism are discussed and taught in the public higher education setting. Although scholars of race and racism contend that colorblind ideology drives the “new racism,” the U.S. is experiencing a resurgence in similar curriculum bans explicitly based on topics related to race and racism. With these trends has emerged a need to understand how explicitly racialized policies fit within the “new racism” framework. Using Victor Ray’s Theory of Racialized Organizations, this study analyzes how colorblind ideology and racialized threat are …

Gratitude As Social Information: How Leader And Follower Gratitude Expressions Influence First-Level Supervisors’ Work Experiences, Meghan E. Kane

Graduate Studies Theses and Dissertations 2026

Gratitude is an important other-oriented, moral emotion known to promote individual well-being, strengthen social relationships, and foster positive workplace outcomes. Yet, organizational research has largely focused on gratitude as an individual trait or internal emotional state, with limited attention to its interpersonal signaling functions. Drawing on Emotion as Social Information (EASI) theory, this dissertation conceptualizes gratitude expressions as social cues that shape how others feel, think, and behave in the workplace. Focusing on first-level supervisors, an underexamined yet critical role in organizations, and integrating insights from leadership and followership research, this work examines how the source of gratitude expressions (leader …

Framing Home: Extending Beyond The Threshold, Kaitlin R. Kirsch

Graduate Studies Theses and Dissertations 2026

This thesis body of work inspects the changes in the artist’s relationship to domesticity and their perceived sense of control over the spaces they have called home. By creating and embellishing spaces that subvert the threshold between the physical and psychic, the works stimulate feelings of comfort or discomfort. Installations of found materials, mixed media, and text-based dark humor, come together to account for this artist’s attempt to navigate the tediousness of daily life. The work takes into consideration the intangible rules that infiltrate a household, defining the framework in which a person learns to live within, or adapt to, …

Essays On Network Resilience: Enhancing Network Resilience Through Network Governance Structure, Process, Environment, And Leadership, Hanvit Kim

Graduate Studies Theses and Dissertations 2026

As disasters become more complex, their impacts often cascade across interdependent systems, creating failures that extend beyond any single organization or sector. Because such crises cut across organizational and sectoral boundaries, effective response depends not only on the capacity of individual organizations but also on the resilience of interorganizational networks. Yet despite the growing importance of networked coordination in disaster response, the concept of network resilience remains underdeveloped in the literature, with limited consensus on its definition, measurement, and determinants. This dissertation addresses that gap by systematically examining what network resilience is, how it can be conceptualized and assessed, and …

Investigation Of Bulk And Periodically Stacked X(2) And X(3) Materials Using Mid-Infrared Femtosecond Pulses, Woraprach Kusolthossakul

Graduate Studies Theses and Dissertations 2026

Mid-infrared (MIR) spectral region represents a vital part of the electromagnetic spectrum, offering applications in spectroscopy, biomedicine, and remote sensing. However, there are no direct broadband MIR laser sources. Nonlinear frequency conversion techniques using second-order nonlinear materials, such as optical parametric oscillator (OPO) and intra-pulse difference frequency generator (IDFG), are promising methods for generating a broadband MIR spectrum. To achieve an efficient conversion, the phase matching condition between the interacting waves of the nonlinear process must be satisfied. Quasi-phase matching (QPM) is a special technique that enables efficient nonlinear processes in materials that cannot be conventionally phase matched using birefringence. …

Odd Colorings Of Graphs With Maximum Degree And Surface Conditions, Matthew Kyle

Graduate Studies Theses and Dissertations 2026

A proper vertex coloring of a graph is said to be odd if, for each vertex, there is a color that is present an odd number of times in its neighborhood. Introduced as a softening of other coloring problems, this problem has recently seen much research interest. It has been conjectured that all planar graphs are odd-5-colorable. Further research has suggested bounds for odd coloring numbers of graphs with different maximum degree conditions, different girths, and on different surfaces; we progress results in all of these areas. We improve an upper bound for odd coloring numbers of graphs of maximum …

Specters, Fred Lambert

Graduate Studies Theses and Dissertations 2026

Specters is a collection of interconnected short fiction that explores the lives of various characters affected by the Iraq War. Touching upon themes of mortality, dehumanization, guilt, and the trauma inflicted by senseless violence, the stories in this collection aim to blur the line between the concrete and the phantasmagoric. The titular story follows a young Marine whose grip on reality is called into question during the Second Battle of Fallujah. In “Demons,” a recruit undergoing the chaotic and brutal grind of Parris Island begins to wonder if his drill instructors are possessed. “Kill Bodies” chronicles the repeated killing of …

Numerical Simulation Of Micro-Cutting Processes For The Estimation Of Material Fracture Toughness, Juan J. Lainez

Graduate Studies Theses and Dissertations 2026

Accurate determination of plane-strain fracture toughness is essential for structural integrity assessments of engineering components, yet conventional ASTM standardized testing methods require large, notched specimens that are impractical in many industrial and research contexts. This thesis presents a finite element method-based approach for estimating the mode I plane-strain fracture toughness of engineering materials from orthogonal micro-cutting simulations if the continuum damage mechanics-based fracture locus is calibrated. This method will eliminate the need for pre-cracked specimens while maintaining physically grounded fracture mechanics principles. The methodology applies to the Atkins energy-based cutting force model, in which the depth-independent intercept of the specific …

The Development Of An Experimental Chemical Reactor Network Facility For Power Generation And Aviation Gas Turbines, Kesly Lubin

Graduate Studies Theses and Dissertations 2026

Gas turbines are the backbone of power generation globally; however, they are also one of the largest contributors to greenhouse gases and harmful emissions. Advanced combustion strategies, when applied to energy generation, can offer increased optimization of the combustion process with more complete and efficient combustion. With global efforts to reduce NOx formation in energy generation, combustion staging strategies like Rich Quench Lean (RQL), Lean-Premixed (LPM), and Exhaust Gas Recirculation (EGR) have gained more attention in research. The major challenge that exists in the research sector is the ability to evaluate and further develop these techniques at a fundamental level. …

High-Efficiency And Compact Virtual Reality Displays, Zhenyi Luo

Graduate Studies Theses and Dissertations 2026

Virtual reality (VR) and augmented reality (AR) technologies are revolutionizing the way humans interact with digital information. However, current near-eye display systems still face critical challenges regarding optical efficiency, image quality, and device weight. This dissertation focuses on addressing these limitations through innovative liquid-crystal (LC) optics and system-level design strategies to achieve high-efficiency and compact VR displays.

First, to solve the longstanding problem of severe chromatic aberrations in ultrathin LC optics, I proposed an achromatic diffractive LC device. By stacking three LC layers with specifically designed spectral responses and polarization selectivity, I successfully reduced the chromatic aberrations. This idea enables …