Digital Commons Network^™

Non-Destructive Hhxrf Archaeometry For Grouping Individuals Via Trace Element Analysis Of Dental Remains, Griffon G. Binkowski

Graduate Studies Theses and Dissertations 2026

Handheld X-ray fluorescence (HHXRF) spectrometry has been validated as an accurate, non-destructive method for analyzing archaeological osseous materials. This study utilizes HHXRF to address key bioarchaeological questions, including population differentiation, individuation, and the interpretation of bioaccumulated trace elements versus diagenetic impacts. Using dental enamel from the Maya site of Altun Ha, Belize (n=20) and several Roman-Christian sites in the Dakhleh Oasis in Egypt (n=6), the occlusal surface of molar crowns was assayed in air using a Bruker Tracer III- equipped with a 12 mil Al, 1 mil Ti, 6 mil Cu filter. Semi-quantitative trace element ratios (Sr/Ca, Fe/Ca, and Zn/Ca) …

Cfd Analysis Of A Full Heat Exchanger Between Ammonia And Supercritical Co2 In Aviation Application, Mairah Ahmed

Graduate Studies Theses and Dissertations 2026

The aviation industry’s transition toward lower-carbon propulsion systems has accelerated interest in alternative fuels, including ammonia–hydrogen fuel blends. In this work, a supercritical CO2 Brayton cycle is integrated with the exhaust stream of a turbofan engine to recover waste heat and utilize it for ammonia preheating and cracking. The recovered thermal energy raises the ammonia temperature to the level required for catalytic decomposition, enabling onboard hydrogen production. The proposed architecture combines ammonia cracking with a high-bypass, two-shaft turbofan engine representative of the propulsion system employed on the Boeing 737 MAX 8. This approach addresses the challenges associated with onboard hydrogen …

Infrared Systems And Their Application On Target Detection And Geolocation, Li Zhang

Graduate Studies Theses and Dissertations 2026

The infrared spectrum contains various sub-bands (from near infrared (NIR) to long-wave infrared (LWIR), which are specialized at different detection tasks. Objects that are well camouflaged to human vision can be highly noticeable in NIR imagery. For vision navigation, the varying illumination condition and the cluttered urban background poses challenges in the visible band but can easily be resolved by using a thermal imager operating in LWIR. Despite this potential, practical deployment remains limited by the lack of suitable platforms, task-specific datasets, and long-duration field validation. This dissertation addresses these gaps through the design and evaluation of two infrared sensing …

Making Unsafe Sequences Unexecutable: Formal Protocol Enforcement For Cyber-Physical Systems, Arthur Amorim

Graduate Studies Theses and Dissertations 2026

Cyber-physical systems execute physical actions in response to software commands, making their communication protocols a primary attack surface. A stealthy attack is a sequence of individually valid messages that violates a required ordering, driving the system into an unsafe state without malware or protocol violation. Existing defenses examine messages or physical state in isolation, not protocol level sequences, and cannot prevent them. Preventing them requires enforcement that makes unsafe sequences unexecutable at the communication boundary.

Formal methods offer a principled path to enforcement, but no tool spans specification to safe deployed hardware. Model checking automates proofs but has no certified …

An Empirical Comparison Of K-Nearest-Neighbors And Logistic Regression Classification Models, Jackson Cushing

Graduate Studies Theses and Dissertations 2026

This thesis presents an empirical comparison of two classification methods: Logistic Regression and K Nearest Neighbors (KNN). The primary objective of this research is to evaluate the strengths and limitations of each method when applied to real-world datasets. Several publicly available datasets on diabetes, breast cancer, heart attack risk, and cardiovascular disease, were analyzed. For each dataset, K Nearest Neighbors models were implemented in the same way logistic regression had already been applied. The results demonstrate that while logistic regression offers interpretable parameter estimates and performs well when the underlying predictor and outcome relationship is approximately linear, however KNN can …

Independent And Interacting Effects Of Co-Presence And Social Media 'Likes' On Online Disinhibition, Margaret M. Doheny

Graduate Studies Theses and Dissertations 2026

Social media platforms have fundamentally transformed interpersonal communication by creating environments in which behaviors are publicly reinforced through visible social feedback systems such as “likes.” Although prior research has linked online environments with increased disinhibition and negative behavior, existing literature has primarily focused on anonymity and invisibility as the primary mechanisms underlying these effects. However, the mechanistic role of physical and psychological co-presence in driving online disinhibition has received little empirical investigation. The central aim of the present study was to determine whether reduced social presence and the selective reinforcement of negative content contribute to online disinhibition and anticipatory reward-seeking …

Design, Fabrication Modeling, And Optical Metrology Of Mwir Silicon Metalenses, Weiyu Chen

Graduate Studies Theses and Dissertations 2026

Mid-wave infrared (MWIR) optical systems require compact, broadband, manufacturable components whose performance can be predicted and measured reliably. Silicon metalenses are attractive because silicon combines high refractive index, MWIR transparency, and semiconductor-compatible fabrication. This dissertation develops a scale-bridging design–fabrication-modeling–metrology framework for MWIR silicon metalenses.

A shared full-aperture framework connects meta-atom libraries, physical layout generation, angular-spectrum propagation, point-spread-function calculation, and focal-plane energy metrics. Building on this foundation, the Dispersive Sweatt Model (DSM) incorporates meta-atom dispersion into conventional ray-tracing software, enabling broadband co-optimization of metasurfaces and refractive elements. A process-aware design framework then incorporates scanning electron microscopy (SEM)-measured height–radius relationships produced by …

Flow Field Characterization Of The Hyperreact Vitiated Hypersonic Wind Tunnel, Erik R. Fernandez

Graduate Studies Theses and Dissertations 2026

Reliable interpretation of hypersonic ground-test data requires knowledge of the thermochemical state delivered to the test section, especially in combustion-heated facilities where the gas is chemically altered before nozzle expansion. This thesis investigates the HyperReact vitiated hypersonic wind tunnel using the effective specific-heat ratio, γeff, as an experimentally inferred indicator of the coupled chemical and gas-dynamic behavior of hydrogen-air vitiated flow. HyperReact produces high stagnation temperatures through hydrogen-air combustion before expanding the mixture through interchangeable converging-diverging nozzles. During this expansion, temperature-dependent specific heats, molecular-weight changes, finite-rate chemistry, and internal energy relaxation can modify the relationship between Mach number, pressure ratio, …

Gaining Voice, Creating Opportunity: An Exploration Of Non-Native English-Speaking Students’ Sources Of Self-Efficacy In U.S. College Public Speaking Classrooms, Desiree M M Flores-Molina

Graduate Studies Theses and Dissertations 2026

This qualitative dissertation explores the sources of public speaking self-efficacy among non-native English-speaking international students enrolled in U.S. college public speaking courses. The study applies Bandura's social cognitive theory to examine how students describe the experiences that shape their confidence and perceived ability to succeed, with attention to mastery experiences, vicarious experiences, verbal persuasion, and physiological and affective states. It also considers how classroom practices and instructor support contribute to or constrain students' confidence.

Data were collected through semi-structured student interviews, guided reflection artifacts connected to major speech assignments, and key-informant interviews with public speaking instructors. Thematic analysis was used …

A Systematic Review And Characterization Of Privacy Noncompliance In Real-World Applications, Alexander E. Charkiewicz

Graduate Studies Theses and Dissertations 2026

Software applications increasingly rely on user data to provide their functionality, but improper handling of such data can lead to serious privacy noncompliance with applicable regulations and policies. A prominent example is the Facebook–Cambridge Analytica scandal, in which a third-party application collected the personal data of approximately 87 million Facebook users without users' consent. Despite growing attention to privacy compliance, two key challenges hinder the systematic understanding and analysis of privacy noncompliance. First, unlike security vulnerabilities, which have been systematically categorized through taxonomies such as the Common Weakness Enumeration (CWE), privacy noncompliance lacks a technical taxonomy describing how it manifests …

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 …

Detecting Error In Ai-Generated Text: The Effects Of Authorship And Word Presentation Speed, Gabriela Flores Cruz

Graduate Studies Theses and Dissertations 2026

The increased us of artificial intelligent (AI) chatbots powered by Generative Pre-trained Transformers has raised concerns about users’ ability to detect errors of AI-generated text. This dissertation examined how readers identify inconsistencies in AI-generated expository passages using the inconsistency detection paradigm from comprehension monitoring research. Across two experiments, it investigated whether perceived authorship and word presentation speed influenced inconsistency detection. Experiment 1 used a 3 (author: human, AI, no author) × 2 (inconsistency type: internal, external) between-subjects design. Perceived authorship did not significantly affect hit rates, sensitivity, or response bias. Exploratory analyses indicated that reading comprehension and working memory predicted …

Investigating The Impact Of School Leaders’ Leadership Style And Teachers’ Intrinsic Motivation For Improved Science Instruction In Elementary Schools, Leila M. Greene

Graduate Studies Theses and Dissertations 2026

A report by the National Academies of Sciences, Engineering, and Medicine, determined that 69% of U.S. elementary teachers are not prepared to teach science, especially in the areas of earth/space and physical sciences. As a result, some elementary teachers avoid teaching science. School administrators play a key role in providing a supportive environment to inspire and motivate elementary science teachers. For this reason, the study utilized the Self-Determination Theory (SDT), to examine three types of school leadership styles (Transformational, Transactional, and Laissez-Faire) and how they impact the intrinsic motivation for elementary science teachers in three areas including autonomy, competency, and …

Using Eye Tracking To Explore How Auditory-Visual Chunking Modulates Visual Search Strategies In Expert Musicians In The Presence Of Auditory Interference, Nicole Arco

Electronic Theses & Dissertations (2024 - present)

Experts show performance advantages during visual search due to their extensive experience with domain-specific stimuli. Experts form memory representations for meaningful visual patterns, called chunks, that group together multiple domain-specific features into larger patterns. The ability of experts to form chunks could allow them to more precisely encode a search template, which could facilitate visual search performance. In the domain of music reading, expert musicians might form chunks that are multimodal (i.e., using visual and auditory modalities). The current studies addressed the possibility that chunks are multimodal by extending a previous cross-modal visual search task to manipulate the presence of …

Toggling (De) Legitimization: How Presidential Candidates Framed Israel And Antisemitism On The 2024 Campaign Trail, Kate Chasin

Honors Theses

This study explores how Joe Biden and Donald Trump changed the way they framed Israel and antisemitism in speeches on the 2024 campaign trail, depending on whether they were speaking to a Jewish or non-Jewish audience. 55 speeches were examined, containing language on American-Israeli relations, the Israel-Hamas War, and antisemitism, manually categorized by frame, and compared for rhetorical shifts based on whether the audience was Jewish. When speaking to a Jewish audience about Israel, candidates humanized themselves as a campaign tool. When speaking about antisemitism, candidates used the form of hatred as a campaign tool.

Spillover Effects Of Medicare Advantage On Fee-For-Service Post-Acute Care Spending, Nyel Bangash

Honors Theses

Does the growth of Medicare Advantage reduce fee-for-service post-acute care spending through practice-pattern spillovers, or do observed spending differences primarily reflect favorable selection? Using a county-level panel of roughly 2,700 counties (2014–2023) and a two-way fixed effects specification, I find that a one percentage-point increase in MA penetration is associated with $9.54 less per-capita standardized FFS spending. Spending per episode falls while participation rates remain stable, consistent with practice-pattern spillovers rather than compositional changes from selection. Welfare indicators from County Health Rankings, CDC PLACES, and CMS Care Compare show no evidence that spending reductions harm health or care quality. The …

Education And The Maternal Childcare Gap: Evidence From The Uk Covid-19 Pandemic, Lara Bakhaya

Honors Theses

This paper examines whether college education shapes working mothers’ access to remote work, flexible working, and childcare hours in the United Kingdom, and whether COVID-19 school closures amplified these inequalities. Using data from the UK Time Use Survey (2016–2021), a repeated cross-sectional diary dataset spanning the pre-pandemic period and five COVID-19 waves, this paper estimates weighted logistic and ordinary least squares regressions on a sample of married or cohabiting, employed mothers. School closures serve as a natural experiment, providing an exogenous shock to caregiving demands that affected all mothers simultaneously regardless of education level. College education significantly predicted working from …

The Market Signal Of Climate Risk: Examining Disaster-Linked Insurance Costs And Home Values, Anika Donohue

Honors Theses

As natural disasters increase in frequency, the resulting rise in insurance premiums threatens a systemic housing affordability crisis across the United States. Leveraging a unique private insurance market dataset, this paper investigates the capitalization of rising premiums into home values and the resulting impact on housing affordability and underinsurance levels. Focusing on the impacts of Hurricane Florence (2018) in North Carolina, I employ a Difference-in-Differences framework to separately analyze the impacts of storm severity on property values and insurance premiums. I find that while property values decrease in proportion to storm severity, functioning as a primary risk signal, insurance premiums …

A Critical Discourse Analysis Of Racial Justice In Virginia Higher Education, Abigail Green

Honors Theses

This honors thesis examines the extent to which public Virginia higher education institutions engage their institutional histories in leadership rhetoric when responding to the Trump administration’s anti-diversity, equity, and inclusion (DEI) policies. Employing a Critical Discourse Analysis (CDA) following Mullet’s (2018) seven-step framework with an inductive coding approach and grounded in rhetorical history theory, this study analyzes official statements from the Offices of the President and Provost across four case study institutions: the University of Virginia (UVA), George Mason University (GMU), the College of William & Mary (W&M), and Longwood University (LU). Data sources span two time periods: May 2020 …

“What Are The Security Issues Surrounding Cislunar Space And Lunar Resources? How Do Theories Of International Politics And Territory Apply To Those Issues?”, Ina Loka

Honors Theses

In the recent decades, cislunar space has attracted significant interest among the biggest spacefaring nations, Russia, China, and the United States. Cislunar space is no longer a distant subject solely associated with scientific studies. It has become a crucial domain in the conduct of military operations and its importance has been increasingly emphasised in these states’ military doctrines. In an environment where the intentions of other actors are hard to determine and where there is a high degree of uncertainty, these three states are ramping up their (counter)space capabilities in order to protect themselves from any adversarial attacks, and to …

Rockyou2024: What’S Your Password?, Yixuan Zhang

Honors Theses

Passwords remain a critical part of almost every account security system. As a result, password guessing attacks remain one of the most widespread yet profitable attacks possible. Setting a password resistant to attacks is thus an important task for account holders. In this paper, we use the RockYou2024 database, a collection of approximately 10 billion real-world passwords collected from data breaches, to analyze the characteristics of passwords found in real life. We start with basic statistical property analysis, such as length, distribution of digits and symbols, and proceed onto more complicated properties such as frequencies of combinations of characters, entropy …

The Conscription Imperative: A Philosophical, Paternalist, And Egalitarian Case For Universal National Service, Timothy Wenhsiang Khoh

Honors Theses

Inspired by my experience as a conscript for two years prior to college, this three-chapter honors thesis presents a philosophical justification and proposal for an American implementation of a national service model. This thesis seeks to justify conscription (a) on moral/ethical grounds as a coercive measure, (b) as a paternalistic policy, and (c) on egalitarian grounds. More broadly, my national service proposal contributes to the debate on methods and measures the American government ought to pursue to increase equity and solidarity among an ever-polarized citizenry.

From Shock To Routine: The Evolving Impact Of Shutdown-Related Sentiment On Stock Markets, Yiran Shao

Honors Theses

To address gaps in existing research, this paper selects two U.S. government shutdown periods, 2018-2019 and 2025, as research samples to explore the effect of policy uncertainty on sentiment. This paper primarily analyzes the following two research questions.

First, what is the correlation between government shutdown-related sentiment during the shutdown period and daily market fluctuations? Specifically, can the sentiment index constructed from shutdown-related news effectively predict the next-day stock return during the event period?

Second, does the market have a learning effect? That is, between 2018-2019 and 2025, has the relationship between shutdown-related emotions and market outcomes weakened, shortened the …

Associations Between College Students' Belonging, Classroom-Based Relationships, And Mental Health Outcomes, Ella Grace Will

Honors Theses

Humans have a fundamental need to belong (Baumeister & Leary, 1995). A lack of belonging is associated with negative mental health outcomes, making it important to study student belonging in higher education (Strayhorn, 2019). Classroom-based relationships with professors and peers positively impact students' belonging (Tinto, 1993). The purpose of this study was to evaluate: the relative contribution of professor trust and peer interactions to classroom and university belonging, and to assess the associations between student belonging and internalizing symptoms. Survey data were collected via Qualtrics in September 2025 (baseline) and December 2025 from students in 32 first-year seminars participating in …

Photo And Spatial Control Of Rna Structures And Functions: Exploring Positional Effects And Photo-Responsiveness Of Azobenzene Modified Nucleotides, Jinxi Du

Electronic Theses & Dissertations (2024 - present)

RNA molecules perform many important biological functions by forming complex three-dimensional structures stabilized by base pairing, tertiary interactions, and metal ion coordination. Because RNA function depends strongly on its structure, methods that allow reversible control of RNA conformation and activity are important for understanding RNA behavior and for potential therapeutic applications. However, achieving reversible and site-specific control of RNA structure, especially at the single-nucleotide level, remains challenging. In this dissertation, I developed and applied azobenzene-modified nucleotides as a chemical tool to enable optical and spatial control of RNA structure and function.

The first part of this dissertation focuses on establishing …

Entropic Foundation Of Finance And Physics: Securities Price Dynamics And Quantum Theory, Mohammad Abedi

Electronic Theses & Dissertations (2024 - present)

In many scientific and financial contexts, we must reason and make predictions under conditions of incomplete information. This dissertation develops Entropic Dynamics (ED) as a unified framework for deriving dynamical laws directly from principles of inference. Within this approach, probability distributions represent states of knowledge, and their evolution is determined through entropy maximization subject to relevant constraints. This leads to a novel concept of entropic time and a formulation of dynamics as an inferential process. In this talk, I will present how ED provides a common foundation across multiple domains. In physics, quantum dynamics for particles and scalar fields in …

Beyond Exposure: Belief In Police Misinformation, Media Consumption, And Support For Policing Reform, Linda Balcarova Dietz

Electronic Theses & Dissertations (2024 - present)

In today’s post-truth era, misinformation has become a central feature of modern society. While not a new phenomenon, the 2024 Presidential election demonstrated what a serious problem it represents, as public perceptions were driven more by information they received (true or false) than by objective social conditions. Policing is one of the most debated topics in criminal justice, dividing public opinion along partisan and racial lines. Studies show that the information people receive about police shapes their attitudes, yet criminologists have largely overlooked how misinformation may influence those views. This dissertation fills that gap by experimentally testing how exposure to …

Need For Harmonized Terminology In Cryopreservation To Support Reproducibility, Regulation, And Translation, Susan Wolf, Lakshya Gangwar, Lowell Wolfe, Nikolas Zuchowicz, Irina Filz Von Reiterdank, Srivasupradha Ramesh, Bat-Erdene Namsrai, Joseph Kangas, Joseph Sushil Rao, Matthew Powell-Palm, Timothy L. Pruett, John C. Bischof, Korkut Uygun

Articles

As cryopreservation technologies continue to develop, the need for harmonized terminology across the multitude of disciplines where cryopreservation is applied is becoming increasingly acute. Terminology in cryopreservation remains inconsistent, leading to confusion and barriers to progress. Applications of cryopreservation in medicine, food, agriculture, and conservation remain limited by this lack of consensus. Inconsistent terminology contributes to ethical, legal, and societal issues in translating and integrating new cryopreservation technologies. Here we identify the problem with examples of cryopreservation terminology that demand harmonization. We describe the need for terminological consistency by providing examples of effective terminology harmonization projects in related fields. We …

Creating A Responsible Authorship Culture In Science: Anchoring Authorship Practices In Principles Of Transparency, Credit, And Accountability, Susan Wolf, Véronique Kiermer, Sofia Adams, Kirsten Bibbins-Domingo, Kathleen Hall Jamieson, Joerg Heber, Mohammad Hosseini, Ana Marušić, Beau Nielsen, Magdalena Skipper, Geeta K. Swamy, Yensi Flores Bueso

Articles

Authorship remains the primary currency of academic credit and a cornerstone of research integrity, yet current practices often fail to reflect the collaborative and interdisciplinary nature of modern science and questionable authorship practices persist. We argue that addressing these shortcomings is a collective responsibility shared by researchers, journals, research funders, scholarly societies, and research institutions. We examined authorship guidelines issued by journals and research institutions and found that their recommendations to researchers are highly variable. We propose that fostering a responsible authorship culture requires a shared, principle-based framework grounded in transparency, credit, and accountability. These three interconnected principles highlight when …

Meeting The Moment: A Human Rights–Based Approach To Academic Freedom, Anna Crowe, Glenn Mitoma, Kathleen Cavanaugh, Kristina Eberbach, Gergana Halpern, Amanda Lyons, Johanna Sirera Ransmeier, Kaushik Sunder Rajan, Carrie Booth Walling

Articles

The second Trump administration’s attacks on universities have illustrated both the importance of academic freedom to a robust democracy and the limitations of academic freedom’s traditional grounding in the First Amendment and the AAUP’s 1940 Statement of Principles on Academic Freedom and Tenure. This essay shifts the understanding of academic freedom to a human rights perspective and highlights the significance of academic freedom to human rights centers and institutes operating within universities across the country. International human rights standards conceive of academic freedom as a stand-alone human right that draws on and supports a range of other human rights, notably …