Digital Commons Network^™

Ignition Delay Time Measurements Of Natural Gas/Ammonia Mixtures At Gas Turbine Operating Conditions, Zachary A. Morris

Graduate Studies Theses and Dissertations 2026

Natural Gas/Ammonia (NG/NH₃) fuel blends are a promising route to reduce CO₂ emissions from gas turbines while leveraging existing NG infrastructure, but their autoignition behavior at elevated pressures is not yet well constrained. This work reports high-pressure shock tube ignition delay time (IDT) measurements for NG/NH₃/Air mixtures at gas turbine-relevant conditions. Experiments were performed at pressures of 5, 10, and 25 bar, temperatures from 1500 to 2100 K, with equivalence ratios of Φ = 1.0, 1.2, and 1.4, and argon-diluted fuel compositions spanning pure NH₃ to NG-rich blends. Experiments were carried out in two …

An Investigation Into The Impact Of Open Educational Resources (Oer) On Postsecondary Student Outcomes, Amber Mullens

Graduate Studies Theses and Dissertations 2026

Increasing higher education costs are a concern for policymakers and the American public. In 2024-25, undergraduate students paid on average $1,290 for books and supplies (College Board, 2024). These costs have led policymakers and educators to advocate for the use of open educational resources (OER). OER are teaching and learning materials that are in the public domain or licensed under copyright allowing no cost access, reuse, repurpose, adaptation, and redistribution (UNESCO, 2019, p. 5). While research has demonstrated OER use significantly reduces costs for students, less is known about OER's impact on student academic outcomes. Despite significant research on these …

"Time And Place Have Had Their Say": A Digital Historical Context Guide To Zora Neale Hurston's Their Eyes Were Watching God, Anna Kephart Norris

Graduate Studies Theses and Dissertations 2026

Harlem Renaissance author, anthropologist, and folklorist Zora Neale Hurston (1891-1960) is best known for her 1937 novel Their Eyes Were Watching God. As part of the modern American literary canon, Their Eyes Were Watching God is assigned in countless secondary and post-secondary classrooms across the United States each year. Yet students find the book difficult to understand and educators find it challenging to teach due to its dialect, racial themes, and nuanced historical setting. In this paper, I argue that better understanding of Their Eyes Were Watching God's historical context eases these difficulties in reading and teaching the …

Quantifying The Effects Of Anthropogenic Disturbance On Two Marine Mammal Species With Agent-Based Models, Landon S. Myers

Graduate Studies Theses and Dissertations 2026

This dissertation details the construction and results from two agent-based models (ABMs) that quantify the effects of anthropogenic disturbance on very different marine mammals.  Most would agree the anthropogenic effects on animals are “bad”; the unknown is “how bad.”  Chapter 1 describes the ABM assessing the mortality risk from seagrass loss and the potential loss of a warm water refuge on manatees living in Florida ‘s Indian River Lagoon (IRL).  IRL manatees are at the northern habitat limit and susceptible to hypothermic mortality, and utilize natural and artificial warm water refuges to maintain core temperature.  Combined with reduced seagrass availability, …

Come And See: Exploring Complex Dynamics And Abjection Through A Southern Gothic Family Portrait, Lenee N. Peterson

Graduate Studies Theses and Dissertations 2026

“COME AND SEE: Exploring Abject Theory Through a Southern Gothic Family Portrait” examines the artist’s complex familial upbringing through the visual and narrative traditions of Southern Gothic art. Drawing upon abject theory and the cultural references of folk horror and Southern Gothicism, this thesis positions the family portrait where intimacy, trauma, and cultural inheritance collide. The project argues that direct confrontation with abjection can foster recognition, shared experience, and the possibility of collective healing. Grounded in practice-based research, this work functions as a critical and creative response to familial strain shaped by scarcity, social oppression, and emotional precarity. Through a …

Evaluation Of Electroencephalography Processing Methods For Estimating Metabolic Energy Expenditure During Walking, Stephanie L. Pinelo

Graduate Studies Theses and Dissertations 2026

In this study, three EEG datasets, created via different levels of pre-processing, were used to train VO2 prediction models whose performance was tested and compared. Understanding the link between EEG and VO2 during walking is important when working in rehabilitation or studying metabolic energy optimization. Common methods of measuring these two bio-signals tend to be bulky, uncomfortable, and inefficient, so finding a way to predict VO2 from EEG via 1D CNN model training is a worthy pursuit.  It was hypothesized that, due to a CNN needing more data to find patterns for prediction, a minimally processed EEG dataset would have …

Adaptability And Applications Of Advanced Laser Absorption Diagnostics In High-Pressure Shock Tube Environments, Lucas R. Pitts

Graduate Studies Theses and Dissertations 2026

Theoretical application and physical implementation of various laser absorption spectroscopy (LAS) diagnostics are examined within a high-pressure shock tube facility. Research focuses on the rationale behind the specific optical alignment layouts used across three distinct experimental campaigns, detailing the methodology required to maintain signal integrity in varied reacting flow environments. The first research campaign addresses the pyrolysis of hydroxyl terminated polybutadiene (HTPB) solid propellant binders for solid fuel ramjet (SFRJ) applications by measuring the species time histories of alkenes and aromatics. Alignment configurations prioritized beam stability and signal strength for the decoupling of overlapping absorption features to ensure measurements accurately …

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 …

Study Of Compressibility Of Flames In Scramjet Combustors, Anirudh Ranganathan

Graduate Studies Theses and Dissertations 2026

Viable forms of propulsion for practical hypersonic flight are of great interest in modern times, of which supersonic combustion ramjets(scramjets) are a very advantageous option. Compared to ramjets, which are severely limited by increasing total pressure loss and dissociation effects, scramjets offer a much more efficient form of propulsion in the Mach 6 – 8 regime. Despite this, a common and unmitigated issue facing scramjet technology is scramjet unstart.

Prior investigations researching scramjet unstart have elucidated global heat release considerations in relation to total fueling or combustion modes as a result of global heat release . Minimal work has been …

Old Maps Of The New World & New Theories On The European Encounter With La Florida: An Historical Archaeological And Four Field Anthropological Approach To Peter Apian's Cosmographia (1575), Emerson S F Richards

Graduate Studies Theses and Dissertations 2026

This thesis examines the 1575 Spanish edition of the Cosmographia, a geographic textbook initially authored by Peter Apian and expanded by Gemma Frisius, as a source for anthropological inquiry into early European encounters with the Americas. Little attention has been given to the text’s potential as a source for anthropological analysis, particularly regarding its representations of the Americas and the cultural information embedded in the geographic data. This study addresses that gap by applying a Four-Field anthropological framework—cultural, biological, linguistic, and archaeological—to this edition, which incorporates excerpts from Ieronimo Girava’s qualitative and quantitative description of the Americas, including a …

Design And Characterization Of A Jet Nozzle Using Particle Image Velocimetry, Valerie K. Rodriguez

Graduate Studies Theses and Dissertations 2026

This paper presents the design and experimental characterization of the jet exit velocity from a supersonic nozzle injecting into a low-pressure vacuum chamber using Particle Image Velocimetry (PIV). The PIV method is employed to overcome limitations encountered in prior experiments characterizing a jet-in-crossflow, such as qualitative shock visualization and insufficient data on jet exit properties. The previous set of experiments used Classical Schlieren to visualize the flow as well as emission measurement with IR detectors. For the fuel injection cases, particular emphasis is placed on preventing condensation within the injection line and at the nozzle exit due to under expanded …

Characterization And Antibacterial Assessment Of An Isoborneol-Loaded Nanoemulsion, Sharon M. Rodriguez Villacis

Graduate Studies Theses and Dissertations 2026

In the United States, about 35,000 fatalities occur annually due to antibiotic resistant infections. It is progressively becoming one of the largest challenges when treating hospital-acquired infections. This decline in effectiveness of commonly used antibiotics makes it essential to identify, synthesize, and formulate compounds that possess antimicrobial activity against these common pathogens. Isoborneol, a compound that is naturally occurring terpene that can be derived from the Camphor tree, Cinnamomum camphora, is known for its antimicrobial properties in traditional medicine and in prior literature. To assess this hypothesis, an oil-in-water (OW) nanoemulsion of isoborneol was synthesized, characterized, and assessed for …

Monitoring Shifts In Estuarine Microbial Communities: A Dna-Metabarcoding Approach, Ashley M. Reaume

Graduate Studies Theses and Dissertations 2026

Estuarine microbial communities, including plankton, algae, and bacteria, play important roles in nutrient cycling and food web structure. They are sensitive to changes in abiotic conditions, and shifts in community composition can provide insight into estuarine ecosystem functioning in the face of various physiochemical and anthropogenic stressors. Therefore, monitoring these communities is essential for understanding and maintaining estuarine health. DNA metabarcoding is an emerging technique for enhancing biological monitoring, allowing for the detection of multiple species within a single sample. This dissertation first focuses on how methodological decisions impact DNA metabarcoding results and then implements these optimized methods to perform …

Shock Tube Speciation Analysis Of Hydrocarbon Mixtures Relevant To Solid Fuel Combustion, Diego N. Ruiz Pena

Graduate Studies Theses and Dissertations 2026

Solid Fuel Ramjets (SFRJs) are often used in tactical applications due to their simplicity, robustness, and reliability. No moving parts, atmospheric oxidizer usage, and scalable fuel grain designs make them a great solution for compact, high-speed air-breathing propulsion systems. SFRJs operate by compressing incoming air through a fixed geometry inlet and directing it over a regressing solid fuel surface, where pyrolysis gases are released and transported downstream to the combustion chamber where thrust is generated. Hydroxyl-terminated polybutadiene (HTPB) is a commonly used fuel binder in SFRJ systems due to its high energy density, stable combustion behavior, and ease of processing. …

Tl;Dr (Too Long; Didn't Read): Examining The Assessment And Causes Of Careless Responding Within Experimental Vignette Studies, David L. Sexton Jr.

Graduate Studies Theses and Dissertations 2026

Careless responding occurs when participants answer survey items without considering their content and poses a serious threat to data quality. However, while past research has examined its deleterious effects on both survey and low-stakes cognitive ability measures, little research has focused on careless responding in experimental vignette methodology (EVM) research. EVM studies require participants to attend to one or more experimental vignettes, which are carefully crafted written scenarios designed to manipulate a focal variable across conditions. However, if participants are careless in attending to study vignettes, they may not be exposed to the researchers’ intended experimental manipulations, thereby precluding them …

Defect-Guided And Energy-Driven Unfolding With Learning-Based Strategies: From Geometries With Compact Refolding To Garments, Shah Wasif Sazzad

Graduate Studies Theses and Dissertations 2026

Unfolding and folding are related geometric and mechanical transformations fundamental to structural applications. Particularly, unfolding curved surfaces is important for deployable structures, garment pattern generation, etc. A central challenge is minimizing geometric distortion between a surface and its unfolded counterpart avoiding overlaps. As regions of lower Gaussian curvature typically produce less distortion during flattening, identifying curvature distribution becomes essential. Topological defects in a particle assembly on a surface in its minimum interaction-energy configuration indicate regions of concentrated curvature. In this work, an unfolding method is proposed that segments the surface using defects' location. Cutlines connecting the defects isolate lower curvature …

Critical Engagement With Gpt In U.S. History: Full Integration In An Undergrad Setting, Matt Meador

Teaching Repository of AI-Infused Learning

This project integrates a custom-trained GPT model into undergrad U.S. History courses to support students in analyzing primary sources, evaluating historical perspectives, and bridging the gap into AI Literacy. Students use AI to generate draft responses, then critically review, annotate, and revise outputs, ensuring that human oversight fosters deeper historical thinking rather than passive acceptance of machine responses.

Creating Your Own Learning Path: Lessons From The Physics Classroom, Natalia Romero

Teaching Repository of AI-Infused Learning

Driving Your Own Learning Path is a strategy that guides students to create personalized AI-supported learning. Students initiate and refine their own prompts, progressing from basic questions to deeper conceptual and relational inquiries while using AI as a thinking partner rather than an answer provider. This approach strengthens self-regulation and metacognitive awareness by allowing students to reflect on their learning process and adapt their study strategies in real time.

100 Years: The Uniform System Of Accounts For The Lodging Industry (Usali) 12th Revised Edition, Agnes Defranco, Raymond S. Schmidgall

Journal of Hospitality Financial Management

No abstract provided.

Meeting Accreditation On A Deadline: Using Generative Ai To Rapidly Develop A Graduate Course, Cory Knill, Sean Devan

Teaching Repository of AI-Infused Learning

This entry details an "expert-in-the-loop" framework for rapidly developing an accredited, graduate-level Health Physics course under significant time constraints. The strategy utilized Large Language Models to generate foundational course materials including the syllabus, lecture outlines, and in-class simulations, which were then rigorously curated by faculty. This human-AI collaborative approach enhanced efficiency, enabling instructors to focus more on high-impact, active learning experiences for students.

Ai-Integration In Writing And Research Processes, Kristie Lussier

Teaching Repository of AI-Infused Learning

Strategies for incorporating and reflecting on AI in research and writing process steps including:

• Topic Development
• Researching Sources
• Planning and Outlining
• Drafting and Revising
• Editing and Polishing
• Metacognitive Reflection

Takotsubo Cardiomyopathy In A 55-Year-Old Female With Atypical Chest Pain And A History Of Autoimmune Disease, Carrie Greene, Dana Mathew

Florida Journal of Emergency Medicine (FJEM)

A 55-year-old woman with rheumatoid arthritis and supraventricular tachycardia presented with acute chest pain radiating to the back/left shoulder, with nausea and lightheadedness. Initial ECG showed inferior–lateral ST-segment elevation with reciprocal depressions; within 90 minutes the STE resolved with new incomplete RBBB and diffuse low voltage. High-sensitivity troponin rose (delta ~270 ng/L). Point-of-care and formal echocardiography revealed LV wall-motion abnormalities. Emergent catheterization showed no obstructive CAD (<30% distal OM) with apical ballooning and EF 40–45%, consistent with Takotsubo cardiomyopathy; cardiac MRI confirmed myocardial edema. She was managed with anticoagulation initially, telemetry, and supportive care, and recovered uneventfully with normalization of function on follow-up.

ED Takeaways

• TTC can mimic STEMI with transient STE and conduction changes.

• Troponin rise + non-obstructive coronaries should prompt consideration of TTC.

• Consider TTC in post-menopausal women and those with autoimmune disease; use …

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Unexpected Companions: Appendicitis And Bilateral Testicular Torsion, Jc Alvarenga, Melissa Kirk, Michelle Osorio-Rodriguez

Florida Journal of Emergency Medicine (FJEM)

Abdominal pain is a frequent chief complaint in the emergency department (ED), responsible for 5% of all visits yearly. Despite emergency room work ups, 25% of these cases go undiagnosed. In the pediatric population, abdominal pain can be even harder to differentiate with causes ranging from low acuity constipation to emergent surgical emergencies like torsion or appendicitis. During these visits, the likelihood of two emergent surgical diagnoses occurring concurrently is a rare and often overlooked occurrence.

This case describes a 15-year-old male with a chief complaint of nausea and vomiting starting several hours prior to arrival. In the ED, history, …

Point Of Care Ultrasound For Rapid Identification Of Central Retinal Artery Occlusion And Subsequent Vision Rescue Utilizing Intravenous Alteplase, Joseph Pepe, Karl Kasischke, Calen Hart

Florida Journal of Emergency Medicine (FJEM)

Central retinal artery occlusion (CRAO) is a rare but critical diagnosis to make in patients with acute vision loss. Cases of central retinal artery occlusion historically have a poor prognosis due to delayed presentation, lack of early identification, and limited effective treatment options. Due to these challenges, patients are often left with permanent loss of vision.

We present a case of a male patient in his late 70s with sudden onset of loss of vision to the right eye. Identification of CRAO was made utilizing point of care ultrasound (POCUS). After discussion with neurology, the patient was treated with alteplase …

Ultrasound-Guided Needle Aspiration Of A Peritonsillar Abscess In The Emergency Department, Elizabeth Piwowarski, Kenith Dsouza, Taryn Hoffman

Florida Journal of Emergency Medicine (FJEM)

Background

Peritonsillar abscess (PTA) is a relatively common diagnosis to encounter in the emergency department (ED). If untreated, PTA can lead to serious outcomes such as airway compromise, deep space infections and septicemia. Point of care ultrasound (POCUS) can be used by the emergency physician to confirm the suspected diagnosis, evaluate the size and depth of the abscess, and be used as a guide during needle aspiration.

Case

A 26-year-old male presented to the ED with a sore throat and was found to have a peritonsillar abscess on exam, which was confirmed using computerized tomography (CT) imaging. Providers were unable …

Structured Ai Conversations On Ethical Reasoning In Introductory Psychology, Brianna Mccartney

Teaching Repository of AI-Infused Learning

This strategy integrated structured AI conversations using Perplexity into an introductory psychology course to strengthen students’ ethical reasoning. Guided prompts led students through analyzing historical unethical studies, applying APA and Belmont principles, and proposing ethical redesigns while receiving immediate feedback. The activity concluded with a final paper and AI acknowledgment, fostering both deeper ethical understanding and responsible use of AI in academic work.

Ai-Assisted Literary Analysis In A Flipped Classroom Model: Fostering Critical Engagement, Tizziana Valdivieso, Jules Lemus Gonzalez

Teaching Repository of AI-Infused Learning

The activity was structured into four phases: in the preparation phase, students built a common knowledge base by reading about Salvadoran social issues through literature. During the controlled and free tasks phase, students used GenAI tools to generate outlines, compare them with their own analyses, and refine their essays through brainstorming, drafting, and peer review. Finally, in the evaluation phase, students presented their work in a mock conference and reflected critically on AI’s usefulness, limitations, and ethical implications while demonstrating ownership of their interpretations.

Developing Research Question And Writing Questionnaires Activities, Lauren B. Neal

Teaching Repository of AI-Infused Learning

Students draft a research question based on their own experience, then use a conversation with ChatGPT to refine and edit the question. Later in the semester, students develop questionnaire items to address this research question and use ChatGPT to improve the questionnaire items.

Baudelaire And Manet Remake, Barry J. Mauer

Teaching Repository of AI-Infused Learning

Use AI to remake either a painting from Manet or a poem from Baudelaire (or both!) in any medium: experimental writing, video, poster, song, etc.; the creativity is in your prompt. In addition, write an essay of 4-5 pages explaining and justifying your remake, describing the process and interpreting the results.

Balancing Support And Challenge For Twice-Exceptional Learners Through Ai-Infused Lesson Design, Claire E. Hughes

Teaching Repository of AI-Infused Learning

This strategy prepares graduate teacher candidates to design inclusive lessons for twice-exceptional (2e) learners, or talented students with disabilities, by using AI to infuse both scaffolds for access and enrichments for challenge. Candidates critically evaluate outputs, revising to ensure accuracy, rigor, and alignment with Universal Design for Learning (UDL). The approach models how technology can expand instructional possibilities while reinforcing professional judgment needed to meet the needs of 2e learners.