Digital Commons Network^™

An Integrated Framework For Last-Mile Delivery Optimization Using Reinforcement Learning And Social Media-Based Traffic Prediction In Underdeveloped Megacities, Vasanth Bhat

Graduate Studies Theses and Dissertations 2026

Supply chain management has become increasingly critical as transportation costs rise and urban delivery systems place additional pressure on already congested networks. Last-mile delivery—the movement of goods from distribution centers to end users—represents the most expensive and operationally complex segment of the logistics process, particularly in underdeveloped megacities characterized by unpredictable traffic, limited infrastructure, and sparse real-time data. This dissertation proposes an integrated framework for optimizing last-mile delivery in such environments by combining social media–based traffic intelligence, machine learning, and deep reinforcement learning. The framework leverages unstructured, real-time data from social media platforms to enhance traffic prediction and incorporates these …

Do Fair Schedules Matter? Work-Home Conflict And Justice In Emergency Medicine, Maresca J. Brand

Graduate Studies Theses and Dissertations 2026

Emergency physicians work in a high-demand environment requiring irregular, around-the-clock schedules, which can contribute to elevated work-home conflict and burnout. While previous research has focused on objective schedule characteristics such as length of shift or time of day worked, less attention has been given to how emergency physicians perceive the fairness of the scheduling process itself. Drawing on Work-Home Resources Theory and Personal Resource Allocation Theory, this study examines whether perceptions of schedule justice influence work-home conflict via schedule satisfaction. I propose that perceived fairness in schedule creation functions as a contextual resource that shapes whether a schedule is experienced …

A Framework For Optimizing Creep Model Parameters From Conventional And Accelerated Creep Tests, William D. Day

Graduate Studies Theses and Dissertations 2026

The demand for efficiency in power generation and propulsion requires higher firing temperatures and reduced cooling air consumption which raises metal temperatures. This makes simplistic creep evaluations, such as Larson-Miller and Orr-Sherby-Dorn parameters, inadequate. Finite element analysis (FEA) must simulate primary and secondary creep, predict failure, and provide design guidance. Gas turbine components, expected to last over 100,000 hours, often require extrapolation of limited test data for new materials. It is essential that robust creep simulations be developed efficiently, accurately, and effectively use limited test data.

This dissertation describes an optimized framework for efficient creep testing and rapid construction of …

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 …

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 …

Exploring The Temporal Context Of Abusive Supervision, Alexandra Kandah

Graduate Studies Theses and Dissertations 2026

This dissertation examined the temporal dynamics of abusive supervision and their implications for employee burnout and turnover intentions. Drawing from gestalt characteristics theory and uncertainty management theory, this research investigated whether the timing, frequency, variability, and change in abusive supervision influence employee outcomes beyond traditional cross-sectional conceptualizations. Study 1 used a qualitative design to explore how abusive supervision unfolds over time. Fourteen working adults reporting a past abusive supervisor participated in semi-structured interviews focused on the temporal dynamics of their experience with abusive supervision. Results indicated that abusive supervision often began early, recurred frequently, and was characterized by unpredictability and …

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. …

The Role Of Adolescent Attachment In The Relationship Between Trauma And Identity, Ellie Mitova

Graduate Studies Theses and Dissertations 2026

Traumatic experiences have been shown to influence identity development during emerging adulthood, a complex developmental period. However, research examining how trauma interacts with adolescent attachment qualities to shape identity processes remains limited. Previous studies have primarily focused on infant attachment styles and their long-term developmental outcomes, leaving a gap in understanding how attachment qualities developed through relationships with parents and peers during adolescence may influence identity development in emerging adults. Additionally, while traumatic experiences have been associated with maladaptive identity processes such as rumination and identity distress, some research suggests that trauma may also contribute to deeper identity exploration and …

Cfd Investigation Of Heat Transfer Enhancement In Pipes Using Gyroid Tpms Structures For Industrial Steam Generation, Alejandro Moreno Escribano

Graduate Studies Theses and Dissertations 2026

Industrial heating processes account for nearly 28\% of global CO2 emissions, and fossil fueled boilers predominate in high temperature applications. Industrial electrification can be an effective solution when combined with renewable energy sources. Increasing steam generation efficiency and at the same time maintaining system compactness is a significant challenge in industrial thermal processes. Traditional smooth pipes offer limited heat transfer surface area, which constrains boiling heat transfer performance and reduces the overall efficiency of steam generation systems. Advanced internal geometries have the potential to significantly enhance heat transfer by increasing surface area and promoting fluid mixing. This work presents a …

The Intersection Of Abuse, Child Welfare, And The Law For Intimate Partner Violence Survivors: Gender Violence As An Antagonistic Social Force, Julio Montanez

Graduate Studies Theses and Dissertations 2026

Intimate partner violence (IPV)—as gender violence—pits children’s civil rights and women’s civil liberties against each other. To explore this phenomenon, the current work features five (5) studies that aim to understand the systemic consequences of IPV and child maltreatment for victims and survivors of both types of abuse.

• Study 1 is a qualitative-deductive study featuring a directed content analysis of news media pertaining to a trial court case on lethal child maltreatment and IPV.
• Study 2 is a qualitative-inductive study featuring a feminist critical discourse analysis of trial court data on lethal child maltreatment and IPV.
• Study 3 is a …

Exploring The Role Of Hes4 During Retroviral Infection, Raphael Opoku

Graduate Studies Theses and Dissertations 2026

Human immunodeficiency virus (HIV) infection disrupts immune homeostasis and impairs antiviral defenses, partly by compromising natural killer (NK) cell activity, with simian immunodeficiency virus (SIV) infection in rhesus macaques serving as a valuable model to investigate these mechanisms. This research examines the regulatory role of HES4 and its isoforms in NK cell function during retroviral infection, with particular focus on how Notch signaling–dependent regulation of HES4 shapes NK effector responses. HES4, a downstream effector of the Notch signaling pathway, encodes transcriptional repressors central to immune cell differentiation, yet its contribution to NK cell biology remains poorly understood. Using molecular and …

Do Emerging Social Media Platforms Shape The Gender Gap In Surveillance Political Knowledge?, Saskia Papsova

Graduate Studies Theses and Dissertations 2026

Abstract

Research shows that men consistently score higher than women on standard political knowledge measures, but as Americans increasingly obtain political information through social media, it is unclear whether different platforms affect this gender gap. This study investigates whether social media platforms shape the gender gap in surveillance political knowledge—knowledge of current political facts and contested claims circulating in the contemporary information environment, and which platforms have the biggest impact. Using data from the ANES 2020 Social Media Study, I estimate weighted OLS regression models testing whether platform-specific usage is associated with surveillance political knowledge and whether these associations differ …

A Sensory Ecology Of Fear: Moonlight-Mediated Predation Risk And Foraging Behavior In Neotropical Electric Fish, Chiu Lok Poon

Graduate Studies Theses and Dissertations 2026

Animals must forage to acquire energy for survival and reproduction, yet foraging exposes them to predators. This creates a trade-off between energy intake and safety, wherein the perception of predation risk alone can alter activity patterns. Within this trade-off, risk, energetic needs, and sensory adaptations vary, shifting the balance and favoring different foraging strategies. Using Neotropical electric fish as a study system, I investigated how foraging under predation risk is shaped across biological scales, including environmental dynamics, interspecific sensory differences, activity-timing mechanisms, and intraspecific variations. These nocturnal fish emit continuous electric signals to sense their environment, allowing non-invasive monitoring of …

Multibody Acausal Framework For Structural Dynamics Of Offshore Support Structures With Hydroelasticity And Soil-Structure Interaction, Saad Rahman

Graduate Studies Theses and Dissertations 2026

Offshore energy systems present significant challenges in support structure design due to their scale and the strong coupling between aerodynamic, hydrodynamic, and structural subsystems. These interactions make traditional sequential modeling approaches inefficient for design exploration. Acausal modeling frameworks address this limitation by enabling direct integration of coupled subsystems without reformulating governing equations, improving computational efficiency while preserving physical fidelity. This supports rapid exploration of large design spaces, accelerates iteration cycles, and shortens the path from concept to deployment.

This thesis develops and validates an acausal multibody elastodynamics model for offshore support structures. The framework includes structural flexibility to capture member-level …

Bond Behavior Of Uhpc-Nsc Interfaces For Bridge Deck Repair Under Flexural Loading, Larissa Santiago La Banca

Graduate Studies Theses and Dissertations 2026

The use of ultra-high performance concrete (UHPC) has increased due to its superior mechanical properties and strong bond with normal-strength concrete (NSC). It is widely used as a repair material, particularly in bridge decks, where maintenance remains a challenge. However, the interface between UHPC and NSC is often the weakest region of the composite system and requires careful evaluation.

This study investigates the bond behavior between UHPC and NSC using different surface preparations, test setups, and UHPC materials. The experimental program included unreinforced beams with vertical interfaces tested under three- and four-point flexural loading, and reinforced slabs with horizontal interfaces …

Forest Island Reforestation In The Llanos De Moxos, Bolivia, Ethan Tam

Graduate Studies Theses and Dissertations 2026

Within the Llanos de Moxos of Bolivia thousands of forest islands dot the landscape. These forest islands have been shown to have been integral aspects of the pre-Contact indigenous cultures which existed there for thousands of years. Based on 1967 CORONA imagery and statistical analysis, this work provides insight into how these forest islands are integrated as infrastructure features within their landscape and surrounding network of other archaeological features. This research is carried out through investigations into changes in the size of the forest islands across an interval of 57 years, statistical attempts to categorize the forest island into smaller …

A Sensor Fusion And Optimization Framework For High-Resolution Power Outage Detection And Energy Asset Allocation, Elizabeth Trader

Graduate Studies Theses and Dissertations 2026

Existing power outage datasets lack the spatial and temporal resolution required for neighborhood- level risk assessment, and conventional energy system design optimizes for cost without accounting for community-level demand - resulting in inefficient and inequitable asset de- ployment. This dissertation presents IONCORTEX, a framework integrating three technical contributions: a heterogeneous sensor fusion pipeline combining social media signals with municipal infrastructure records for intersection-level outage detection at six-hour tempo- ral resolution, maintaining detection capability during telecommunications disruptions; a techno-economic analysis pipeline evaluating photovoltaic, battery storage, hydrogen, and diesel portfolios using NREL’s System Advisor Model with Monte Carlo uncertainty quan- tification; and …

Using Inferences From Natural Language Narratives To Improve Video Question Answering, Hoang Bao Truong

Graduate Studies Theses and Dissertations 2026

The purpose of this thesis is to examine how structured narrative representation and reasoning strategies jointly affect the performance of Video Question Answering (VideoQA). Although recent advances in large multimodal and language models have improved video description and retrieval, causal and counterfactual reasoning remain challenging. This thesis studies an inference-only pipeline in which videos are converted into natural-language narratives, and those narratives may optionally be transformed into a structured NarrativeML format before multiple-choice questions are answered without task-specific fine-tuning. NarrativeML is a machine-readable narrative representation that explicitly encodes entities, events, and their causal and temporal relations. Three representational contexts are …

Threads Of The Past: Exploration Of Banal Medievalisms In Russia's Invasion Of Ukraine, Evan Garrett Wallace

Graduate Studies Theses and Dissertations 2026

This dissertation examines how medieval historical narratives circulate within contemporary Western digital discourse surrounding Russia’s invasion of Ukraine. Russian political rhetoric has frequently invoked the medieval polity of Kyivan Rus’ to assert civilizational continuity between the medieval past and the modern Russian state. While these claims have been widely discussed in political and media contexts, less attention has been given to how such narratives appear within everyday online discourse. This study investigates how medieval references are mobilized, circulated, and interpreted within social media environments during the early conflict.

The research draws on a dataset of approximately 160,000 tweets collected from …

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 …

Ecological And Evolutionary Responses To Environmental Change In Two Large North American Mammals, George Zaragoza

Graduate Studies Theses and Dissertations 2026

Climate change and urbanization are resulting in rapid shifts in ecosystems. The effects of these changes are complex, and understanding how species respond is critical for predicting their impacts on genetic diversity and evolution, as well as changes in habitat suitability. Species can respond to these changes in two major ways: through behavioral or genetic adaptation, or by moving to more suitable habitat as conditions change. Adaptive genetic change, in particular, can support behavioral and physiological responses that enable species to persist in novel or changing environments, and understanding these changes can help predict how species will respond to anthropogenic …

Pseudo-Boiling Of Supercritical Co2 In A Parallel-Flow Microchannel And A Micro-Jets Impingement Device And Single-Phase And Two-Phase Heat Transfer Of Subcritical Co2 Jets, Pranzal Ahmed

Graduate Studies Theses and Dissertations 2026

Carbon dioxide (CO2) is gaining attention as a low-toxicity, zero-ozone-depletion refrigerant with a global warming potential of 1, making it an attractive alternative to synthetic HFCs/HFOs. Near its critical point, CO2's thermophysical properties change sharply with small shifts in temperature and pressure — a behavior that can be exploited to enhance heat transfer in trans-critical power cycles and electronics cooling. This dissertation experimentally investigates heat transfer during the pseudo-boiling of supercritical CO2 in a parallel-flow microchannel and a micro-jet impingement device, alongside CO2 flow boiling and single-phase water heat transfer in micro-jet impingement. Using microfluidic devices instrumented with embedded resistance …

Numerical Investigation Of Reacting Flow In Pmma-Fueled Solid Fuel Scramjet Combustors Under Experimental Test Conditions, Hunter Bassett

Graduate Studies Theses and Dissertations 2026

A simplified steady RANS-based numerical study of reacting flow in solid-fuel scramjet combustors is presented to evaluate the ability of commercial CFD frameworks to reproduce key features observed in experimental test sections. The work focuses on solid PMMA fuel in two supersonic combustor configurations: a cavity-assisted flameholding combustor and a variable-angle diverging combustor. The cavity combustor is analyzed as a baseline case and results are compared directly with experimental data. Three combustor geometry states corresponding to ignition, early-burning, and steady-burning conditions are investigated. Meshes are assessed through a systematic grid refinement method to establish grid independence. A novel variable-angle diverging …

Fgf19 As A Colorectal Cancer Serum Biomarker And Fgfr4 As A Mediator Of Anti-Her2 Resistance In Breast Cancer, Jordan Beardsley

Graduate Studies Theses and Dissertations 2026

The fibroblast growth factor 19 (FGF19)-fibroblast growth factor receptor 4 (FGFR4) signaling pathway regulates hepatic metabolism, bile acid (BA) synthesis, and hepatocyte proliferation. This signaling axis also is implicated in promoting tumor progression, therapeutic resistance, and metastasis in certain cancers.

In colorectal cancer (CRC) there is a critical need for non-invasive biomarkers for disease detection and monitoring. We identified FGF19 as a candidate CRC serum marker through meta-transcriptomics and found FGF19 to be expressed and secreted by CRC cell lines. Tumor-derived FGF19 was detectable in mouse serum at levels correlating with tumor volume in a subcutaneous xenograft model. RNA sequencing …

Sensory And Emotional Impacts On Modern Consumer Experiences, Winter E. Bland

Graduate Studies Theses and Dissertations 2026

This dissertation comprises two essays examining how environmental and psychological stimuli shape consumer experience, attitudes, and cognition. The first essay investigates the joint influence of scent temperature (warm versus cool) and scent arousal (stimulating versus relaxing) on experiential attitudes and cognitive performance in digitally mediated consumption environments. Across multiple lab experiments with biometric validation, findings reveal that these two scent dimensions interact to shape downstream outcomes. Warm, low-arousal scents (e.g., vanilla) enhance consumers' experiential evaluations of digital interactions but do not improve task performance, whereas cool, high-arousal scents (e.g., peppermint) boost cognitive efficiency and accuracy but do not elevate experiential …

A Case Study Of Employees’ Perception Of Leadership Styles In Law Firms, Naylet M. Sanchez

Theses and Dissertations

This applied dissertation explored employees' perceptions of their supervisors’ leadership styles and how those perceptions shape their job performance and satisfaction within a mid-sized personal injury law firm operating across multiple offices in the Southeastern United States. The effectiveness of leadership styles in law firms significantly influences employee performance, productivity, and organizational success, yet the unique contextual factors of legal practice environments have remained substantially underexplored in the leadership literature. Much of the existing research has focused on general organizational settings rather than the knowledge-intensive, hierarchical, and high-pressure dynamics that characterize law firms. This applied dissertation was designed to address …

The Effectiveness Of Behavioral Skills Training In Enhancing Teachers’ Ability To Write Specific, Measurable, And Individualized Iep Goals Targeting Quality-Of-Life Skills, Emilia Endean

Theses and Dissertations

This applied dissertation sought to assess the effectiveness of a behavior skills training (BST) protocol in improving teacher behaviors for writing high-quality individualized education plan (IEP) goals that target quality-of-life (QoL) domains. High-quality IEP goals that target both academic and functional repertoires are required by the Individuals with Disabilities Education Act (2004) and are essential for students with disabilities to achieve meaningful outcomes. BST is an effective intervention for teaching a variety of skills. No prior research has explicitly examined the application of BST for teacher professional development in writing IEP goals.

This single-subject study used a time-lagged multiple probe …

Improving Middle School Students’ Scores On Math Word Problems Through Reading Comprehension, Diane M. Burgess

Theses and Dissertations

This applied dissertation was designed to address the poor performance of middle school students on math word problems attributed to the lack of reading comprehension skills. A review of standardized math assessments for middle school students confirmed that the greater proportion of questions is made up of word problems. Despite having strong mathematical skills, middle school students are likely to fail to find the correct solutions for math word problems. In the middle school classroom, the development of reading comprehension skills and mathematical abilities are tasks required of different teachers. Math teachers at a middle school in Florida did not …

Cultural Heritage Curriculum And Student Identity Development: A Mixed-Methods Study, Alexus Corley

Theses and Dissertations

This applied dissertation was designed to examine the influence of a cultural heritage curriculum on first-grade students’ cultural knowledge, awareness, and understandings of culture. Specifically, the study investigated the extent to which participation in a 4-week cultural heritage curriculum influenced students’ knowledge of cultural history and contemporary contributors, their understandings and perspectives about culture, and the convergence of quantitative and qualitative findings.

Using a qualitative-dominant mixed-methods research design, the study was conducted with 19 first-grade students enrolled in a Title I elementary school in Central Florida. Quantitative data were collected using the researcher-developed cultural knowledge preintervention and postintervention assessment and …

Fairness: Examining Support And Resources Available To Respondents In Title Ix Cases, Emanuel Jerome Oliver

Theses and Dissertations

This phenomenological study explored how higher education institutions develop Title IX procedures to ensure respondents receive fair treatment from the outset of the adjudication process. It also examined how colleges and universities provide resources and support to respondents throughout the Title IX process. The study used semi structured interviews with Title IX Coordinators at various higher education institutions to understand how they have developed practices to support respondents.

Findings revealed that higher education institutions have developed various methods to support respondents in the Title IX process. The goal of the Title IX process is to ensure that respondents receive the …