Digital Commons Network^™

Detonability Limits Of Liquid Fuel Cloud, Khaoula Chougag

Graduate Studies Theses and Dissertations 2026

Detonation-based propulsion systems are of significant interest owing to their high thermodynamic efficiency, rapid energy release, and favorable entropy production relative to deflagration-based systems. Liquid fuels offer practical advantages in storage and volumetric energy density, making them attractive candidates for next-generation detonation engines. This dissertation investigates the detonability characteristics of liquid hydrocarbon fuel clouds through three interconnected studies conducted in a turbulent shock-tube environment using high-speed imaging and pressure diagnostics. The first study maps the detonability limits of monodisperse n-dodecane clouds by systematically varying droplet diameter (5-50 μm) and O₂/N₂ oxidizer composition at equivalence ratios spanning ϕ = 0.8-2.0. Results …

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 …

Sustaining High-Quality Service-Learning In Research Intensive Universities: A Qualitative Study Of Instructor Perspectives, Marika Koch

Graduate Studies Theses and Dissertations 2026

In a world that often feels disconnected due to our sociopolitical climate, there is a need to create socially aware and civically engaged adults. Service-learning integrated into higher education courses can do that and more. Research indicates that both students and the community benefit significantly when students participate in effective service-learning classes. Students who take service-learning courses in college tend to exhibit higher academic achievement, enhanced social and emotional skills, and greater long-term civic engagement. Effective service-learning courses share three common elements: they foster a strong connection to course objectives, promote reciprocity for all involved, and encourage active student reflection. …

Bridging The Gap: How Sociodemographic Factors Shape Adults’ Decisions To Pursue Hearing Aids, Logan Lorié

Graduate Studies Theses and Dissertations 2026

Despite hearing aids becoming more accessible to adults with hearing loss, hearing aid uptake rates remain low, partly due to sociodemographic factors that influence an adults’ decision to pursue amplification. This study systematically reviewed research on how sociodemographic factors – to include age, gender, socioeconomic status, education level, race/ethnicity, and military status – contribute to the decision-making process. This review guided an analysis of these variables using the National Health and Nutrition Examination Survey (NHANES), a large public health database. To ensure enough hearing aid users were included in the analysis, NHANES data were combined across survey cycles from 1999 …

From Designation To Implementation: A Qualitative Study Of Support Structures For Latinx Students At A Hispanic-Serving Institution, Steven A. Freeman

Graduate Studies Theses and Dissertations 2026

This study addresses the persistent misalignment between the enrollment-based designation of Hispanic-Serving Institutions (HSIs) and the extent to which these institutions implement intentional practices that support Latinx student success. As HSIs continue to grow nationally, it is critical to examine whether institutional efforts move beyond symbolic designation toward meaningful “servingness,” particularly given the increasing reliance on these institutions to advance social mobility and educational attainment for Latinx students. The purpose of this qualitative study is to explore the support structures an HSI provides to promote Latinx student success and to examine Latinx students’ perceptions of the effectiveness of these supports. …

Ex Vivo Sensitivity Assays With Molecular Validation To Guide Preclinical Drug Selection For Schwann Cell Tumors, Ethan W. Hass

Graduate Studies Theses and Dissertations 2026

Schwann cells are the glial cell of the peripheral nervous system. They are dependent on receptor tyrosine kinase-mediated RAS signaling, cell matrix adhesion, and cell-cell contact to proliferate during nerve development and repair. These pathways become deregulated with loss of function of the merlin tumor suppressor encoded by NF2, leading to benign tumors called schwannomas. Patients with NF2-related schwannomatosis (NF2-SWN) develop bilateral vestibular schwannomas that cause hearing loss, tinnitus, and death from brainstem compression if untreated. Severe NF2-SWN causes multiple spinal and peripheral schwannomas and neuropathic pain. Schwannomas require careful monitoring, trial and error use of repurposed anti-cancer …

Strategic Signaling Or Structural Friction?: How Ai Disclosure Moderates Resource-Performance Dynamics In Hotels And Restaurants, Jaewan Heo

Graduate Studies Theses and Dissertations 2026

Artificial intelligence (AI) has become an increasingly important strategic issue in the hospitality industry. While prior research has primarily examined AI as an operational technology that improves efficiency and service delivery, less attention has been paid to how AI-related disclosures influence investor evaluations of firm resources. This dissertation investigates whether AI-related disclosures moderate the relationship between organizational resources and financial performance in publicly traded hospitality firms.

Drawing on signaling theory and the resource-based view, this study conceptualizes AI disclosures as strategic signals that shape investor perceptions of firm capabilities and future value creation. Firm-level financial data were obtained from Compustat …

The Diversity Of Flavivirus Antibody Dependent Enhancement (Ade) Profiles From A Pediatric Cohort In Mexico, Maiesha Samiha Mahmood

Graduate Studies Theses and Dissertations 2026

The Aedes mosquito-borne flaviviruses Zika (ZIKV) and dengue (DENV-1-4) cause an estimated 400 million annual infections globally and pose an increasing threat to public health. Typically, individuals infected with ZIKV or a DENV serotype generate neutralizing serotype-specific antibodies and non-neutralizing, cross-reactive antibodies that bind multiple flaviviruses. Upon secondary heterotypic infection, pre-existing antibodies can either protect or exacerbate disease through antibody dependent enhancement (ADE). ADE occurs when non- or sub-neutralizing concentrations of cross-reactive antibodies facilitate viral uptake into FcγR-bearing myeloid cells, enabling infection of otherwise non-permissive cells and driving severe disease. To date, ADE has not been characterized at a population …

Hunter. Hunted. Human: Warfighters' Emotional Responses To Weapons In Tactical & Strategic Context, Simon Mace

Graduate Studies Theses and Dissertations 2026

Human emotional responses to weapons have long been assumed to be relatively parsimonious, comprised predominately of aggression, anxiety, and fear responses. However, most research on this weapons effect has focused on civilians – who are notably more likely to be targeted by than to employ weapons. So, there is reason to speculate that emotional responses to weapons vary more than previously believed. This is significant for three reasons. First, positive emotional responses generate more desirable combat behaviors, specifically the willingness to engage adversaries. Second, negative emotional responses catalyze an unpredictable range of behaviors, many of which are tactically and operationally …

Generating Boundary Conditions For Compound Flood Modeling In A Probabilistic Framework, Pravin Maduwantha Mahanthe Gamage

Graduate Studies Theses and Dissertations 2026

Flooding in coastal riverine environments is often driven by the combined influence of multiple hydrometeorological flood drivers, including storm surge, rainfall, waves, and river discharge, which is referred to as compound flooding. A robust flood hazard assessment requires simulation of a wide range of flood driver conditions through dynamic compound flood models to capture the variability in resultant flooding. However, such assessments remain limited by the short length of observational records and the high computational cost of physics-based methods used to generate temporally varying boundary conditions. This dissertation develops a statistical framework to characterize compound flood drivers and generate large …

The Perceptions Of Instructional Coaching On Teacher Efficacy And Retention In Elementary Schools, Stephanie Lucas

Graduate Studies Theses and Dissertations 2026

Administrators in a large school district in Central Florida encountered challenges regarding teacher retention and sustainability. Flite STEM coaching, a new instructional coaching model, was developed to support teachers in hopes of reducing those challenges. This model includes coaching cycles that encouraged collaboration and reflective thinking aligned with professional learning. This qualitative study focused on implementing the Flite STEM coaching model with teachers and instructional coaches. The coaching cycle consisted of the following: 1) a pre-observation conference, 2) video observation, 3) post-observation conference with feedback, and 4) a professional learning opportunity. It included DebriefScape Observation Dashboard resources to collect and …

Making Art For The Love Of The Game, Alissa Beth Burch

Graduate Studies Theses and Dissertations 2026

“Making Art for the Love of the Game” interweaves visual aesthetics from video games and associated online fan community practices with self-portraiture to reflect and process personal past medical trauma, a developmental period in online interactive environments, and showcases self-expressive fan content which joins an underrepresented and emerging sub-culture to contemporary art. Working through an interdisciplinary studio practice, combining printmaking, found-sticker collage, and painting refracts digital aesthetics found in online communities. I intentionally juxtaposed these physical modes of making with digital subjects to examine these subjects’ merit as artistic mediums.  It reflects a contemporary mode of art making, and acts …

Developing The Whole Child: A Retrospective Ethnographic Case Study Of Prosocial Learning Efforts At One Elementary School, Bevan Brown

Graduate Studies Theses and Dissertations 2026

An alarming trend among elementary-aged students in the United States exhibiting significant deficits in social-emotional competency development has intensified since the Covid-19 pandemic. Challenges in developing competent prosocial skills in the elementary-aged years have been associated with difficulties in emotional regulation and social interactions, which can result in compromising school readiness and long-term academic success. Existing school infrastructure provides a vehicle for early intervention, specifically in supporting students with poor social and emotional wellbeing. Thus, the need for innovative pedagogical and instructional approaches that address the complex challenges of the 21st century has become increasingly essential. Coordinated approaches to prosocial …

Club Sport Injury Rates, Injury Characteristics, Functional Movement Screen Relationships, And Impact Of Core Training, Rebecca Carson

Graduate Studies Theses and Dissertations 2026

It is estimated that over 10% of college students take part in club sports at their college or university, yet sport-related injuries are a common consequence of participation. The Functional Movement Screen™ (FMS™) is a movement analysis tool that identifies functional deficits and asymmetries and is widely applied in athletic settings to assess injury risk and inform rehabilitation and injury prevention programs. Core strength and stability play a crucial role in functional movement quality and may even reduce risk of injury and improve sport performance. This dissertation aimed to establish club sport injury rates and characteristics for club men’s ice …

The Bite Model And Multi-Level Marketing: How Monat Propagates, Lilly D. Cheung

Graduate Studies Theses and Dissertations 2026

This study aims to understand how MONAT Global Corp, a Multi-Level Marketing (MLM) company, utilizes rhetoric that aligns with Steven Hassan’s BITE Model of Authoritarian Control. Hassan is a cult expert and cult survivor whose work primarily explains undue influence and thought control with BITE representing Behavior, Information, Thought, and Emotional control. The MLM MONAT is a haircare brand that operates through a recruitment-and-sales-based hierarchy, in which sellers sign up and work under one another in a layered marketing structure. To meet quotas and maintain ranks, representatives will use rhetorical strategies to recruit new sellers beneath them in their ‘downline’ …

Enhanced Atomization And Combustion In Subsonic Ljic Systems Using Ultrasonically Driven Solid Obstructions, Daniel Sebastian Cruz

Graduate Studies Theses and Dissertations 2026

The liquid fueling methods used in aircraft propulsion have undergone extensive optimization, with Liquid Jets in Crossflow (LJIC) emerging as a simple yet effective injection scheme. LJIC enables sufficient fuel mass flow rates and penetration for high-speed operation, however fuel trajectory and droplet size remain highly sensitive to crossflow conditions. As a result, wide flight envelopes introduce variability in atomization, leading to unsteady combustion performance. Recent work has incorporated a pintile, a solid obstruction placed in the path of the fuel jet, to redistribute momentum and reduce trajectory variability across varying flow conditions. While this approach improves trajectory uniformity, it …

Examining Team Leader Visual Dynamics And Team Performance In Pediatric Emergency Simulations, Annamarie Brosnihan

Graduate Studies Theses and Dissertations 2026

Pediatric medical emergencies are dynamic, high-intensity clinical situations that demand coordinated interdisciplinary actions for optimal patient outcomes. Effective teamwork and leadership are critical, especially during the preparatory phase. Here, team leaders define task goals, assign individual roles, and maintain situational awareness. This phase directs attention, organizes team dynamics, and ensures medical interventions are deployed properly. Medical simulations provide a unique opportunity to capture dynamic leadership behaviors in a controlled low-stakes environment using multimodal data, such as eye tracking, to gain insight into team leader cognitive processes (i.e., attention allocation and information processing). Prior research suggests that leaders who visually attend …

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 …

Detection And Discrimination Of Targets In Infrared Imagery, Adam T. Cuellar

Graduate Studies Theses and Dissertations 2026

Automated infrared (IR) imagery analysis is essential for persistent surveillance, defense, and security, yet it remains difficult when sensors move and when unknown objects appear. This dissertation addresses two fundamental problems: (1) detecting small moving targets amid platform-motion induced parallax and (2) distinguishing between known stationary targets and out-of-distribution (OOD) objects.   For detecting moving targets while the platform itself is in motion, auxiliary Global Positioning System and Inertial Navigation System data are combined with image analysis. Direction Cosine Matrices from calibrated inertial measurements enable sub-pixel frame alignment unattainable with purely image-based registration. The stabilized sequence is processed by a Reed–Xiaoli …

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 …

Applying Harm Reduction To Binge-Eating Disorder: Protective Behavioral Strategies Against Uncontrolled Eating, Emily Burr

Graduate Studies Theses and Dissertations 2026

Binge-eating disorder (BED) is a highly deleterious mental illness, with ramifications ranging from psychological impairment to premature mortality. Despite the awareness of intervention urgency, treatment strategies to manage BED have limited long-term efficacy. Therefore, it is of high necessity to illuminate other methods of reducing the potential effects of binge eating (BE), either by combatting severity or frequency of the behavior. Protective behavioral strategies (PBS), first identified in the substance use field, are methods by which an individual attenuates potential harm from a behavior without expectation of abstaining (i.e., a harm reduction approach). Given high likelihood of treatment relapse for …

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 …

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 …

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 …

Social Support As An Effect Modifier Of The Assocation Between Drug-Use Related Stigma And History Of Substance Use During Pregnancy Among Women Who Use Unprescribed Opioids In New York City: A Cross-Sectional Study, Isabelle C. Lynch

Graduate Studies Theses and Dissertations 2026

Substance use and misuse among women who are pregnant is a growing public health concern in the United States. Overdose deaths are now a leading cause of death among pregnant and postpartum women, and neonatal abstinence syndrome rates have increased to 23 per 1000 births. A barrier addressing substance use among these women is social stigma, which in part is driven by punitive drug policies that criminalize substance use during pregnancy and societal gender roles and norms surrounding women’s substance use. Social support, including emotional, instrumental, and informational support, can serve to mitigate the negative impacts of stigma on health …

Exploring The Temporal Dynamics Of Gaming-The-System And Self-Regulated Learning Behaviors Within A Game-Based Learning Environment, Cameron E. Marano

Graduate Studies Theses and Dissertations 2026

Consistently monitoring and regulating cognitive and metacognitive skills during learning is difficult. As a result, game-based learning environments (GBLEs) have been designed to provide richer learning experiences. They foster self-regulated learning (SRL) skills and offer a way to study learners' interactions within complex environments. Although SRL in GBLEs has been widely studied, large gaps remain. For example, it is unclear how improper or maladaptive regulation in GBLEs signals gaming-the-system, in which learners manipulate features to avoid authentic learning. This phenomenon is widely studied in intelligent tutoring systems (ITSs). Limited research has examined how and when both gaming-the-system and SRL behaviors …

Structural Design And Development Of Deployable Propeller Blade, Annan Mashin

Graduate Studies Theses and Dissertations 2026

Aerospace systems frequently face competing requirements between compact packaging and high aerodynamic performance. Large propellers improve efficiency and thrust generation, yet launch constraints and confined storage volumes limit their maximum span. Conventional deployable solutions rely on hinges, locking mechanisms, and external actuation, increasing mechanical complexity and reducing reliability. This dissertation investigates an alternative approach in which elastic instabilities in thin composite shells are deliberately harnessed to enable rapid, mechanism- free deployment of aerodynamic structures. This work harnesses propagating instability in open- section thin-walled airfoil geometries to enable reversible transformation between compact stowed and stiff deployed configurations. By tailoring structural architecture, …

Temporal Patterns Of Storm Surges: Event-Identification, Clustering, And Count Modeling, Ariadna Martin Oliva

Graduate Studies Theses and Dissertations 2026

Coastal regions face compounding risks when extreme events strike in rapid succession, yet most statistical frameworks treat such events as independent, a simplification that can critically underestimate hazard. This thesis addresses that gap through three interconnected contributions focused on the temporal clustering of storm surges at the global scale. A new automated method is developed to extract independent storm surge events from continuous tide gauge records. By leveraging event correlations and a soft-margin approach that accounts for local variability, the method identifies characteristic event durations across 1,485 global tide gauge stations, revealing the influence of both local site conditions and …

Revolution In The Age Of Social Media: A Mathematical Model For Information, Dissent, And Stability, Killian Muollo

Graduate Studies Theses and Dissertations 2026

Revolutions, defined by Skocpol as rapid transformations in class, state, and/or social structures, are important world events that can cause civil wars, spark international trends, and result in transitions toward democratic and autocratic regimes alike. They are characterized largely by the mechanism of mass mobilization, which is increasingly facilitated by online networks and digital communication. In this dissertation, we investigate such means and outcomes of revolutions as dynamical systems. We construct three models describing separate but complementary aspects of revolution, beginning at the smallest unit of analysis and then moving outward in scope. First, we construct a graph-based model to …

Perceptions Of High School Students’ Sports Participation And Potential Impact On Post-Secondary Involvement, Anthony J. Wishart

Graduate Studies Theses and Dissertations 2026

This dissertation examined the shifting culture of youth sports in the United States and its impact on academic motivation among adolescent student athletes. The study utilized Self-Determination Theory (SDT) as a framework. Traditionally, youth sports have helped students with personal growth and academic success. However, the contemporary emphasis on early sport specialization and the decline of opportunities in nonrevenue male sports are part of broader cultural shifts and require deeper exploration.

This study investigated the relationship between sport specialization among high school male junior and senior student athletes and their levels of academic motivation, as well as the consequences of …