Digital Commons Network^™

Ecological Feedbacks In The Earth System, Eugene J. Murphy, Jessica J. Williams, Isla H. Myers-Smith, Vivienne P. Groner, David M. P. Jacoby, Lester Kwiatkowski, Jess Melbourne-Thomas, Emma Ransome, Cristina Banks-Leite, Laurent Bopp, Marion Gehlen, Eileen E. Hofmann, Babette Hoogakker, Nadine M. Johnston, Yadvinder Malhi, Emma L. Cavan

CCPO Publications

Ecological feedbacks are fundamental features of the Earth system, affecting physical processes and chemical cycles. Our understanding of the interactions underlying these feedbacks at different spatial and temporal scales and the extent to which feedbacks affect Earth system functioning remains limited. Climate change and other anthropogenic pressures are already negatively affecting ecological processes in marine, freshwater, and terrestrial ecosystems. These will most likely be amplified in the coming decades under our current warming and socioeconomic pathways. The knock-on impacts on ecological feedbacks have the potential to cause rapid perturbations to the Earth system, and may significantly impact the structure and …

Basal Melting Variability Of The Ross Ice Shelf From Mixing Ratios Of Simulated Water Masses (1993-2018) And Potential Climatic Drivers, Enrico Pochini, Andrea Bergamasco, Florence Colleoni, Manuel Bensi, Giorgio Budillon, Pasquale Castagno, Michael S. Dinniman, Pierpaolo Falco, Emanuele Forte, Vedrana Kovačević, Stefanie L. Mack

CCPO Publications

Several water masses circulate under the Ross Ice Shelf (RIS), the largest ice shelf in Antarctica, each causing basal melting with a specific spatio-temporal pattern. To investigate these patterns and their variability, we applied a mixing ratio analysis to simulated water masses from a new numerical ocean model of the Ross Sea. The simulation, which was run over 26 years (1993–2018) and which includes the RIS cavity, shows good agreement with seaborne and mooring observations. The total RIS basal melt rate is 90 Gt/yr on average, and is caused mostly by High Salinity Shelf Water (HSSW) (68%), which enters the …

Agricultural Productivity Under Energy Development: Insights From California, Wai Yan Siu, Sherzod B. Akhundjanov

ODU Articles

This paper examines how agricultural productivity patterns in Kern County, California, a leading region for both agricultural production and oil and gas development, co-vary with the spatial and temporal expansion of hydraulic fracturing and associated energy infrastructure. Using parcel- and county-level analyses, we characterize how agricultural productivity differs across proximity to energy development and across spatial scales. The results reveal spatially heterogeneous and scale-dependent patterns: parcel-level evidence indicates lower Enhanced Vegetation Index-based vegetation productivity within the 20-mile proximity zone around fracking wells, while county-level results show heterogeneous crop-specific yield changes during the post-expansion period. Together, these findings highlight the importance …

An Insidious Interstice: Understanding Cognition And Language Behaviour Through The Eyes Of Juvenile Justice Professionals, Anne M. Perrotti, Allison T. Chappell, Tancy Vandecar-Burdin

Human Movement Studies & Special Education Faculty Publications

Introduction

Despite evidence suggesting language and cognition deficits are prevalent for justice involved youth, little research explores how juvenile justice personnel experience language and cognition behaviours in the youth they serve.

Aims

This qualitative study explored how juvenile justice personnel understand language and cognition skills and deficits in justice involved youth.

Methods

Twenty-two U.S. juvenile justice professionals participated in individual, semi-structured interviews. Questions focused on individual understanding of receptive language, expressive language, social communication, and cognition (i.e., problem-solving, predicting consequences and impulsiveness) in juveniles served. Using a phenomenological lens, transcripts were coded identifying themes and sub-themes of participant responses.

Results …

Seeing The Invisible Load: Xr+ Multimodal Sensing For Cognitive Ergonomics In Industrial Training, Jessica M. Johnson, Andwele Grant

Virginia Digital Maritime Center (VDMC) Faculty Publications

Extended reality (XR) technologies are increasingly positioned as disruptive Industry 5.0 tools for human-centric industrial training and intelligent human–system integration. Coupled with multimodal sensing (eye tracking, EEG, HRV, GSR, and other physiological signals), XR environments promise to make otherwise invisible cognitive demands observable, especially for novice trainees entering complex industrial settings. Yet the evidence base is fragmented: (1) there is no quantitative synthesis of the cognitive ergonomics benefits of XR plus sensing; (2) little is known about which XR–sensor configurations yield the strongest effects; (3) prior reviews rarely focus on industrial and manufacturing tasks; (4) multimodal signals are used predominantly …

Modern Potentiostat Architectures For Electrochemical Sensing: Design, Integration, And Future Directions, Reagan Aviha, Gymama Slaughter

Center for Bioelectronics Publications

Potentiostats are essential to electrochemical sensing, enabling precise control of electrode potentials and measurement of current responses. As demand grows for portable, wearable, and point-of-care systems, potentiostat design has evolved from benchtop instruments to compact, low-power, and wirelessly connected platforms. This review provides a comprehensive, system-level perspective on modern potentiostat architectures, covering operational principles, analog front-end design, signal generation and acquisition, communication protocols, and software integration. Unlike prior reviews that treat these aspects independently, this work integrates electrochemical theory with electronic design and data communication frameworks. Key components, including operational amplifiers, transimpedance amplifiers, DAC/ADC subsystems, and microcontroller-based control, are examined …

From Reviews To Value: Harnessing Crowdsourced Data To Capture Visitor Perceptions And Economic Benefits Of Recreation, Laura Costadone, Shan Zhang

ODU Articles

Quantifying the recreational value of protected natural areas is essential for sustainable management, conservation financing, and informed decision-making. Traditional approaches, such as on-site surveys, are often costly, spatially limited, and constrained by regulatory barriers. This study evaluates the potential of crowdsourced user-generated data to jointly assess visitor perceptions and the economic value of nature-based recreation, using Back Bay National Wildlife Refuge (Virginia, USA) as a case study. We integrated georeferenced photographs and textual content from four platforms (Flickr, TripAdvisor, Yelp, and AllTrails) with supplementary survey data to analyze visitation patterns, visitor sentiment, cultural ecosystem services, and recreational value using the …

Cybersecurity Center For Offshore Wind Energy (Final Project Round), Sachin Shetty

Center for Secure and Intelligent Critical Systems (CSICS) Publications

This project establishes a Cybersecurity Center for Offshore Wind Energy with the objective of designing and operating a cyber-physical testbed for wind energy farms (WEFs) that enables comprehensive cybersecurity research. The testbed incorporates a Supervisory Control and Data Acquisition (SCADA) system connected to turbine models via industrial-grade programmable logic controllers (PLCs) and remote terminal units (RTUs). It supports side-channel data acquisition, implementation and analysis of various cyberattack scenarios, and development of attack detection, mitigation, and best-practice guidance tailored to wind energy systems. During the project, the team expanded the number and fidelity of mathematical turbine models (MTMs), integrated these models …

Pursuer Evader Surveillance Game, Zijie Mu

Honors Theses

This thesis studies the pursuer evader surveillance game with a triangular obstacle in the short-term. In the game, the pursuer aims to maintain surveillance of the evader as long as possible while the evader aims to break surveillance in a finite time. We classify the player strategies into  ideal ones and best admissible ones. The outcome of the game is determined by line of sight. We reduce the 4D game to a 3D game with a boundary separating two different local regimes. When the evader starts inside the threshold, we show that there exists an admissible evader that maintains an …

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 …

Ethics And Art: Fulfilling Your Aesthetic Obligations To The Fullest, Zoe Epstein

Honors Theses

My thesis defends the existence of aesthetic obligations, or the duty to engage with aesthetics, primarily in relation to the arts. I find completing aesthetic duties results in greater intellectual growth, virtues, and quality of life. Secondly, I argue you should consume and create human-made art over AI-generated art because human art has higher aesthetic value. Finally, I discuss the extent to which worth and non-worthy immoral art plays a beneficial role in fulfilling aesthetic obligations.

La Mode Comme Arme À Double Tranchant : Construction Et Déconstruction De L’Indochine Coloniale, Sasha Hanson

Honors Theses

Cette thèse explore la façon dont la mode façonnait le pouvoir, l’identité et la résistance dans l’Indochine française à travers trois oeuvres littéraires : Un barrage contre le Pacifique (1950) de Marguerite Duras, Métisse blanche (1989) de Kim Lefèvre et The Book of Salt (2003) de Monique Truong. En appuyant sur les théories postcoloniales de Gayatri Chakravorty Spivak, Frantz Fanon et Homi K. Bhabha, j’argumente que la mode et les vêtements font plus que révéler les hiérarchies coloniales de race, classe et genre ; ils les renforcent activement. Alors que dans son récit, Duras expose les inégalités socio-économiques à l'intérieur …

Spear, Perilous Times, And The Bright Sword: Radical Reinventions Of The Arthurian Legend In 2020s Literature, Brigid Flanagan

Honors Theses

The story of King Arthur has been told time and time again, emerging most recently as a major literary fascination for fantasy writers. The huge body of Arthurian literature published in the 20th century has been well-documented. Raymond H. Thompson’s The Return From Avalon surveys nearly two hundred works published from 1882 to 1983, noting trends and common themes that emerge over this collection. Several more scholars have examined modern Arthurian literature within a smaller scope, including Shiloh Carroll who looks into certain trends across both 20th and 21st century texts. Particular works have been the focus of closer analysis, …

Net Carbonyl Ene Reactions Of Olefins With Aldehydes, Alexandra Mock

Honors Theses

Aldehydes and olefins react in the presence of base and TMSOTf to yield homoallylic alcohols. In this net ene reaction, TMSOTf acts as a Lewis acid to activate the aldehyde, leading to a strong oxygen-silicon bond that acts as a driving force in the reaction. In the proposed mechanism, the α-methylstyrene attacks the carbonyl carbon of the TMSOTf-activated aldehyde to produce a carbocationic intermediate. Elimination using a relatively bulky base (2,6-lutidine) provides the homoallylic alcohol. This reaction has proven robust in terms of the aldehyde and olefin scope.

“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 …

Mechanisms Driving Disparities In Income Mobility Across The Income Distribution, Joe Larkins

Honors Theses

This study examines intergenerational income persistence across the income distribution, testing whether mechanisms driving inequality differ between families in the top and bottom halves of the income distribution. Using data from the National Education Longitudinal Study of 1988 (NELS:88), a nationally representative longitudinal survey of 8th grade students and their parents, this research estimates an interaction model comparing parental income effects for children in advantaged versus disadvantaged economic circumstances. The analysis reveals that a $1,000 increase in parental income yields eight times greater income gains for children in the bottom half of the distribution compared to those in the top …

Crafting The “Greatest Classics” Of Girlhood: Advice Columns, Diaries, And The Emotional Lives Of American Teenage Girls, 1918-1939, Kylee Violet King

Honors Theses

“Crafting the ‘Greatest Classics’ of Girlhood: Advice Columns, Diaries, and the Emotional Lives of American Teenage Girls, 1918-1939” explores how American teenage girls who came of age between 1918 and 1939 used writing as a form of expression. As a response to the heightened anxieties—the “storm and the stress”—that was caused by the social structure of the era, teenage girls used writing in advice column letters and diaries as a form of self-fashioning, self-reflection, and self-therapy to discuss courtship, dating, and romantic relationships. Additionally, depending on the medium, writing acted as a form of advice seeking and community support. Writing …

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 …

Mass Homicides And Mass Shootings: Comparisons, Trends, And Unpacking Further, Stefana E. Lotempio

Electronic Theses & Dissertations (2024 - present)

Mass shootings have garnered more public attention in recent years, in large part due to their increase in both frequency and lethality. Despite public concern, policy and prevention efforts have remained limited and have not yet resulted in a decrease in these events. Understanding mass shootings as a subset of mass murder will help identify how mass shootings are unique from other mass murders, which will help to identify more effective prevention tactics. Additionally, exploring mass shooting trends in the context of homicide trends and other crime trends will illuminate patterns that can be used to inform policy and prevention …

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 …

Intergroup Relationship Attitudes Among Multicultural Adolescents In South Korea: Friendship, Dating, And Marriage, Jeewoo Shin

Electronic Theses & Dissertations (2024 - present)

This dissertation asks how multicultural adolescents in South Korea develop their attitudes toward crossing group boundaries in social and intimate life—whom they would accept as a close friend, a romantic partner, and a spouse—and what factors shape these attitudes. Korea’s immigrant population has grown more than seventyfold since 1990, largely through marriage migration, and the children of those unions are now reaching adulthood. Research on these adolescents has focused on how well they adjust, leaving open how they themselves come to view relationships across group lines.

Using eight annual waves of the Multicultural Adolescent Panel Study (N = 1,112), which …

On The City-Scale Energy Balance Under Electrification And Renewable Generation: The New York City Case, Nour Elgalad

Electronic Theses & Dissertations (2024 - present)

Integration of renewable resources to meet the growing energy demand of dense urban regions is becoming a global priority under decarbonization mandates. This study contributes to these ongoing efforts by assessing the feasibility of using locally deployable urban renewable resources, namely offshore wind in the New York Bight region and rooftop photovoltaic (PV) systems over New York City, to meet the electricity demand of the city, and the grid vulnerabilities that emerge, during two contrasting extreme-weather periods: the intense heatwave of June 2025 and a fully electrified winter cold snap in January 2018. A unified, meteorologically driven modelling framework, based …

Impacts Of Segmenting Principle On Learner Performance And Attitude In A 3d Environment: A Mixed-Method Multiple Case Study, Kristin Herman, Mohan Yang, Jim Shifflet, Noah Glaser

STEMPS Faculty Publications

This study presents a conceptual replication of Moreno’s (Appl Cogn Psychol 21:765–781. 10.1002/acp.1348, 2007) study on the benefits of adhering to the segmentation principle when utilizing multimedia learning objects. Furthermore, this study expands upon the original by taking place in a low-immersive virtual reality environment, allowing for further understanding on the extent to which multimedia principles are still relevant. Both a synchronous and an asynchronous case are presented. Results indicate benefits for both cases in far transfer of learning. Furthermore, synchronous learners indicated a significant reduction in cognitive load and increased overall attitudes towards learning due to segmented instruction.

Drafting Policy To Address Academic Integrity: The Other Ai In Education, Elizabeth Burns

STEMPS Faculty Publications

The article focuses on the role of school librarians in drafting policies to address academic integrity amid the increasing use of artificial intelligence (AI) in K-12 education. It defines AI, including generative AI (GenAI), and discusses both the challenges and opportunities AI presents for teaching and learning, emphasizing the need for clear guidelines on ethical use. The article outlines three common AI policy models—permissive, hybrid, and restrictive—and stresses the importance of collaboration between librarians and teachers to establish consistent expectations, promote critical thinking, and ensure proper attribution of AI-generated content. School librarians are positioned as key facilitators in guiding students …