Digital Commons Network^™

Knowing By Heart: Philosophical Dimensions Of Humanistic Mathematics Education, Catherine Henney

Theses and Dissertations

This project seeks to revive interest in late twentieth century humanistic mathematics education (HME) so that its principles might cross the boundary of higher education and settle in corners of the K-12 math education space. In particular, HME’s theme of teaching math humanistically directs attention to features and phenomena that bear strongly on students’ daily classroom experiences. Personhood, agency, inquiry, meaning, environment, feelings, relationships: these elements invite a more thorough meditation and philosophical analysis. Though it is a largely philosophical endeavor, this project is enlivened by classroom vignettes and case studies that bring practical relevance to HME’s core principles. Chapters …

Why People Stay: Factors Contributing To Staff Retention In Community Mental Health Clinics, Brianna D. Boggs

Theses and Dissertations

The current behavioral health crisis is exacerbated by a crisis in the behavioral health workforce. Recruiting and retaining workers in behavioral health has become a challenge, making access to services for those needing them even more difficult. This study aimed to examine which factors have the strongest influence on an employee’s work engagement and decision to remain employed at their current organization. This study used Aarons et al.’s multilevel, multiphase implementation model (2011), with a focus on inner contextual factors as a means to help inform potential interventions to address the factors and improve retention. This study also applied the …

Effectiveness Of Immersive Virtual Reality Combined With Task-Specific Training On Hemiplegic Arm Function Following Stroke: A Single Case Series Study, Rahsaan J. Holley

Theses and Dissertations

Motor recovery of the arm following a neurological injury is a common goal of the rehabilitation process for individuals impacted by the condition . Due to the long-term functional implications of impaired arm movement, individuals are often trained to use compensatory strategies to complete functional tasks without incorporating the weakened limb. While compensatory strategies offer stroke survivors the opportunity to regain a level of independence, such approaches fail to directly address the underlying causes of the disability (i.e., limited range of motion, decreased strength, poor coordination, motor planning difficulties) which can unfortunately result in long-term impairment and functional disability.

Motor …

Unraveling The Reactivity Of Nitrate Ester Explosives: Insights From Femtosecond Time-Resolved Mass Spectrometry And Computational Chemistry, Erica Britt

Theses and Dissertations

This dissertation uncovers the ultrafast molecular mechanisms underlying the decomposition of nitrate ester explosives—nitroglycerin (NG), ethylene glycol dinitrate (EGDN), and amyl nitrate—through the integration of femtosecond time-resolved mass spectrometry and advanced computational chemistry. Although these compounds play fundamental roles in both military and civilian contexts, the precise molecular dynamics governing their pronounced reactivity and impact sensitivity have remained inadequately characterized. Our research establishes that low O–NO2 bond dissociation energies are the primary driver of ultrafast fragmentation and high reactivity in all three esters. The distinctive molecular architectures of these esters dictate their explosive properties: NG’s tri-nitrate configuration leads to exceptional …

Identity Formation Of A Pre-Service Art Educator: An Arts-Based Approach To Data Visualization As A Means Of Understanding Personal Experience, Kelsey L. Peterson Mays

Theses and Dissertations

This research centers on the emotional experience of the author as a pre-service art educator during her student teaching semester. The research utilized art-based data collection methods and analyzed both written and visual reflections over an eight-week period of teaching art at the elementary school level. The culmination of findings is synthesized in the form of a body of four visual artworks, where each work reflects the data collected over a consecutive period of two weeks. The study investigated the causation and ramifications of certain emotions during a transitional time wherein the author existed in a liminal space between student …

Predictive Inference For Ion Concentration With Machine Learning And Bayesian Methods, Alexandra B. Ulbing

Theses and Dissertations

Ultraviolet--visible (UV--Vis) spectroscopy produces high-dimensional signals that are strongly collinear, shift with concentration, and exhibit heteroskedastic, non-Gaussian noise. These features make supervised regression from spectra to ionic concentrations statistically challenging and limit the reliability of methods that assume linear structure or homoscedastic errors.

This dissertation develops two complementary frameworks for prediction and uncertainty quantification in UV--Vis spectroscopic regression: (1) frequentist stacked ensembles combined with distribution-free conformal prediction, and (2) Bayesian hierarchical modeling and Bayesian stacking. Together, they provide a unified view of model-based and distribution-free uncertainty across nickel and nickel--cobalt datasets.

The frequentist component builds ensembles of Functional Data Analysis …

Exploring The Role Of Host Immune Responses And Bacterial Sensory Pathways In The Development Of Treponema Denticola-Mediated Periodontal Disease, Annie N. Hinson

Theses and Dissertations

Periodontitis is a chronic inflammatory disease driven by dysbiotic microbial communities and maladaptive host responses. Treponema denticola, a spirochete pathobiont, is strongly associated with disease severity. However, the molecular mechanisms underlying its interaction with host tissues and regulation of virulence remain incompletely understood. This work examines both the epithelial immune responses and bacterial transduction systems that shape T. denticola pathogenesis. Transcriptomic analysis of gingival keratinocytes revealed IL-36γ as the most highly induced cytokine following infection with T. denticola. Functional studies demonstrated that IL-36γ induction occurs in a dose- and time-dependent manner through TLR2/6 signaling, requiring the NF-κB, PI3K/Akt, and …

Laser Ablation-Induced Corrosion Resistance For Molten Salt Equipment Materials Evaluated Utilizing Electrochemical And Spectroscopic Analysis, Peggy Milota

Theses and Dissertations

Advanced reactors and used nuclear fuel separation (i.e. pyroprocessing technology) utilize high temperature salt as a thermal storage medium as well as an ionic solution for electrochemical processes. The use of these aggressive molten chloride and fluoride mediums requires specific materials or additional system alterations to extend the lifetime and structural integrity of equipment due to corrosion. Some materials, in the presence of inherently impure salt, will corrode and form oxide films in a specific formation that decreases corrosion rate by electrochemically and physically preventing elemental movement to the material surface. This is referred to as a passivation layer. However, …

Relationship Extraction Using Retrieval Augmented Generation For Biomedical Dataset, Jannat Jannat

Theses and Dissertations

With the increasing number of structured and unstructured data, obtaining reliable information effectively has become crucial. In the biomedical domain, extracting information from the scientific papers is crucial in order to stay up-to-date with accurate information, given the increased pace by which new research studies are published. This work focuses on identifying relationships between entities that are extracted from the abstracts and titles of biomedical research papers. In this work, we developed a Retrieval Augmented Generation (RAG) based system to automatically identify relations between biomedical entities. We evaluate multiple open source Large Language Models (LLMs) and the number of examples …

The Proprietor Of Battersea: The Life And Legacy Of American Founder John Banister (1734–1788), Davis C. Simmons

Theses and Dissertations

This research examines the multifaceted life of Colonel John Banister (1734–1788) during the eighteenth century. Using a biographical methodology, the study highlights his significance as an American founder from Virginia. It provides a chronological account of his accomplishments and a detailed analysis of his complex character as a politician, slave owner, and public figure of cultural importance. The research draws on primary sources such as letters and official records, as well as secondary sources including biographies and historiographies that have received limited attention. The thesis argues that Banister’s role as a Revolutionary leader and American founder is underrepresented in current …

Implementation Of Quantized Artificial Neural Networks With Spintronic Stochastic Computing, Saadi Sabyasachi Mr.

Theses and Dissertations

Artificial intelligence or machine learning is going through a rapid expansion. It also incurs significant costs for power and device footprints. Various approaches are being explored to design energy and hardware efficient machine learning models. Stochastic computing has been proposed for efficient machine learning implementation. It requires a source of random number generation which poses some practical challenges. So spintronic solutions such as magnetic tunnel junction has been used for random number generation. Again, spintronic random number generation to implement high precision circuit is prone to device-to-device variations. Hence we designed quantized artificial neural network with spintronic stochastic computing which …

The Influence Of The Covid-19 Pandemic On Student Engagement At A Historically Black University, John C. Travis

Theses and Dissertations

This study examined student engagement across three NSSE administrations at an HBCU—pre-COVID (2018), during COVID (2019), and post-COVID (2022). Engagement was analyzed across four themes: Academic Challenge, Learning with Peers, Experiences with Faculty, and Campus Environment. Results showed that Learning with Peers declined significantly over time, with the largest drop between 2018 and 2022, reflecting pandemic-related disruptions to peer interaction. No significant year effects emerged for the other themes. Two-way MANOVAs indicated that gender, first-generation status, and major did not significantly predict engagement, nor did they interact with year. In contrast, classification emerged as the most consistent predictor, with upper-division …

Maternal Postpartum Depression And Affect Incongruence: Exploring Early Developmental Pathways To Emotion Dysregulation, Laura E. Boylan

Theses and Dissertations

Emotion dysregulation, or responses to emotions that do not meet the needs of the situational demands or social standards, has been noted as an early risk factor for later psychopathology. Maternal postpartum depression (PPD) has been shown to increase children’s risk of developing maladaptive emotion regulation (ER) strategies. One potential mechanism linking PPD to these outcomes is affect incongruence, or a mismatch between biological and emotional responses to stress. While such incongruence may be adaptive in older individuals who consciously mask their internal stress (e.g., suppressing biological arousal while appearing calms), it may be maladaptive in infants and young children …

In Praise Of Dust, Hasler Gomez-Perez

Theses and Dissertations

A desire path is a physical manifestation of where a system has failed, but also where it has been refused, where a new path has been made. The wake exists in the post, it is not a singular, untethered event, but a subtle double entendre that lives in the post-death, but also in the pre-life—not a liminal limbo, but a superposition of dying and waking.

This collection was assembled and composed over the course of two years as I navigated my practice, myself, and others. Present here are my thoughts, my experiences, and in many ways my beliefs. IN PRAISE …

Facile Synthesis Of Gold, Copper, And Silicon Nanostructures By Laser Ablation In Liquid, Nicholas Simpson

Theses and Dissertations

Metal nanoparticle (NP) synthesis is a continually evolving area of research, owing to the widespread application of NPs in fields such as catalysis, drug delivery, and biosensing. Compared to bulk metal material, NPs contain a larger proportion of surface atoms and exhibit unique optical properties, thus making them ideal for applications where maximizing surface interactions is key. Moreover, their compositions can be altered in several different ways, as evidenced by metal alloy, core/shell, supported, and defective NPs. While conventional synthesis methods are capable of producing NPs in large quantities, they often require conditions of high temperature and pressure, strong reducing …

From Ink To Code, From Binary To Boundless Reality—Until All Returns To Emptiness, Weitong Sun

Theses and Dissertations

This thesis explores the entangled relationship between language, memory, and technology through the lens of immigrant experience. Moving from programming to visual storytelling, I investigate how dyslexia, bilingualism, and cultural displacement have shaped my ways of reading, writing, and coding.

Beginning with personal reflections on switching from computer science to art, I trace how code offered a form of clarity and expression where written language had once failed me. Yet as I ventured into real-time simulation and XR storytelling, I encountered new forms of mistranslation—where narratives dissolved, mutated, or resisted coherence altogether.

Through a series of experiments in code-driven art, …

How To Remain A Stranger / Encountering, In A Basement, Hannah Rotwein

Theses and Dissertations

How to Remain a Stranger / Encountering, in a Basement consists of two parallel essays. On the lefthand side of the page, How to Remain a Stranger explores the ways that the legend of the Wandering Jew, the Tradescantia genus of plants, peddlers, and exile relate to my practice of collecting, sorting, and combining found objects. On the righthand side, Encountering, in a Basement describes my thesis exhibition at the Institute for Contemporary Art at Virginia Commonwealth University. Focusing on the idea of the encounter, I detail the materials, considerations, and processes behind four of the ten sculptures in the …

A Parting Repast, Debra D. Dowden-Crockett

Theses and Dissertations

Both the thesis document and exhibition comprise the story of my journey through grief, examination of loss, contemplation of death, and transformation through acceptance and relinquishment. I conflate art and emotion to put form to the complex human experience of watching a loved one die, having to say a last goodbye, and the mourning that ultimately follows.

I examine the rituals surrounding death, the role of memory, and the symbolic presence of food as a shared experience of both mourning and nourishment, the intimate moments of mourning, and the gradual process of finding peace and closure.

Featuring works from a …

Post Opera, Suzy Lykins

Theses and Dissertations

Post Opera is a spell and work of embodied research which explores medicalization, desire, labor, and belief. Through methods of performance, sound, text and installation, I facilitate encounters of trans-femininity, spiritual power and connectivity. An opening wound, a set of psychic scalpels, sutures and bandages prepare this text for your consumption, take care to digest her well.

Love Letter, Amy S. Duval Ms

Theses and Dissertations

I applied to graduate school to reconnect with and better understand my studio practice, acquire language, and to disrupt my known ways of making. Generally speaking, I see my practice as being about being seen, and unseen, and the pain and pleasure of being perceived. I’ve learned about my ways of being in the studio. I’ve come closer to speaking honestly about my relationship with my materials, processes, tools, how I value my own labor, and how this informs my work. I am grateful for the cascade of small epiphanies that came and left me while I worked in my …

The Paradox Of Value, David Enrique Guarnizo

Theses and Dissertations

The present thesis project examines how, in the United States, and especially in the state of Virginia, archetypes of "wealth," "value," and "identity" have been constructed in relation to land and territory. This analysis explores the tension between the inherent value of life on the land and the economic value that can be derived from it. This tension is exemplified by a theory known as the "paradox of value", also referred to as the "paradox of water and diamonds", which was developed by the renowned Scottish economist and philosopher, Adam Smith. This theoretical framework serves as a fundamental axis for …

Dosimetric Validation Of An Electron Monte Carlo (Emc) Algorithm For Small Cutouts And Extended Ssd’S: Assessing Emc In Small Field Dosimetry, Anil Basavaaraju

Theses and Dissertations

This thesis validates the accuracy and limitations of Electron Monte Carlo (eMC) simulations in Eclipse treatment planning systems for small-field electron dosimetry and extended source-to-surface distances (SSDs). Systematic measurements were performed using a microDiamond detector across various electron energies and field sizes. The study examines the discrepancies between measured and calculated (eMC) dose distributions, validating challenges due to lateral scatter disequilibrium and extended air gaps. Our findings provide systematic data for eMC dose calculations and demonstrate that eMC performs within clinical tolerances, with the ultimate goal of enhancing the precision and safety of radiation treatments.

Feeling Foreign / Foreign Feeling: Affect In Southeast Asian Diasporic Short Story Collections, Francys Aerin Fortes

Theses and Dissertations

Affect studies have long been saturated with scholarship investigating the fluidity of emotions, though a larger turn in the field now prioritizes the felt experiences of marginalized peoples. Sianne Ngai’s work is one part of this turn that seeks to unpack the effects of oppressive systemic forces on Black, Brown, and queer bodies. Sianne Ngai reexamined the nature of emotions in her seminal text Ugly Feelings (2005), particularly concerned with how negative feelings are disproportionately felt by marginalized bodies as a result of conditions of obstructed agency, systems of power, and wage labor capitalism. Drawing from Ngai’s writing, this thesis …

Beneath The Roots: Becoming Native Through Mangrove Teachings And Wisdom, Shima Aeinehdar

Theses and Dissertations

Beneath the Roots uses the wisdom of mangroves to investigate the naturalization of humans through science, spirituality, and storytelling. The seeds of Avicennia marina, the gray mangrove, drifted to Qatar at some point in history and took root, like so many other people here. The mangrove survives in a harsh saline environment through a unique salt excretion process. As a Qatar-born expat, I relate to this struggle to survive and nativize in a land that is both my own and foreign to me, in a cyclical conversation. I explore this nativization process through a ritual of salt extraction, creating botanical …

Imagine Being Free: Decolonizing Actor Training In University And Conservatory Programs, Hope R. Ward

Theses and Dissertations

While blackface is considered the first proper form of American theater, I want to consider how the auction of enslaved Africans functioned as the original form of American theater. The auction block acted as a kind of interactive performance in which enslaved bodies were surveilled and evaluated as a kind of spectacle. In many ways, the auction block inaugurated White viewing practices of the Black body that reverberated in the day-to-day practices of slavery and subsequent visual media like the refashioning of blackface minstrel tropes within contemporary entertainment (plays, television, film). In Imagine Being Free: Decolonizing Actor Training in University …

Multiphysics Modeling Of Material Response To High-Intensity X-Ray And Laser Pulses: Heating, Ablation, And Plasma Expansion, Youssef Abouhussien

Theses and Dissertations

This dissertation presents a computational framework to investigate material response under high-intensity X-ray fluxes produced by an exo-atmospheric nuclear detonation and laser-material irradiations, with a focus on heating, ablation, and plasma expansion phenomena relevant to satellite vulnerability and high-energy-density environments. A hybrid Monte Carlo and Two-Temperature Model (MC-TTM) was developed to simulate X-ray and laser energy deposition and thermal relaxation in metals and semiconductors across a range of X-ray and laser pulse durations from femtoseconds to nanoseconds. Results demonstrate distinct thermal behavior between materials, with ablation thresholds and phase transitions captured in good agreement with experimental data.

In parallel, a …

Development Of A Mediation Model Of Pain Cognition In Adult Patients With Sickle Cell Disease, Daniel M. Sop

Theses and Dissertations

Pain is a hallmark of Sickle Cell Disease (SCD), a genetic hemoglobinopathy characterized by chronic hemolytic anemia, vaso-occlusion, and organ damage. While acute vaso-occlusive crises (VOC) have been extensively studied, the mechanisms underlying chronic pain and its interplay with brain function remain unclear. This dissertation investigates the relationships between cerebral blood flow (CBF), fluid cognition, and pain sensitivity in adults with SCD, utilizing advanced imaging techniques and validated assessment tools.

Arterial spin labeling (ASL) and functional magnetic resonance imaging (fMRI) were employed to measure CBF and brain activity, respectively. Pain sensitivity was assessed using the Pain Sensitivity Questionnaire (PSQ), and …

Development, Synthesis And Characterization Of Advanced Low- Cobalt And High-Nickel Cathode Materials For Lithium-Ion Batteries, Arjun Patel

Theses and Dissertations

This dissertation focuses on the improvement of structural and electrochemical stability of active materials for lithium-ion batteries. It explores the modification strategies to mitigate the issues related to Ni-rich cathode materials, along with the continuous production of cathode precursors using a slug flow reactor to improve the quality of the product.

The First part of the dissertation examines the effect of substitution of cobalt with aluminum and iron on the electrochemical stability of Ni-rich lithium nickel cobalt manganese oxide (NCM) materials. This study investigates how Al and Fe doping work and how they impact the performance and stability of these …

Immersive Medical Practice And Clinical Training: Virtual And Mixed Reality In Pharmacy And Orthopedic Surgery, Silas Semprini De Toledo Contaifer

Theses and Dissertations

Extended‑reality (XR) technologies including virtual reality (VR) and mixed reality (MR) offer new ways to improve training and surgical precision. This thesis evaluates their educational and clinical impact through two complementary studies.

Specific Aim 1 compared an immersive 360° video VR module with conventional training for teaching USP < 797> sterile‑compounding skills to second‑year PharmD students (N = 36). VR trainees raised their knowledge from 6.14 ± 1.55 to 8.69 ± 1.07, yet the overall post‑test advantage versus control was not statistically significant (U = 71.50, p = 0.21). Item‑level McNemar testing showed significant VR‑exclusive gains on three critical questions (K5, K6, …

Queer-Keying: Performing Video Processes As [Trans]Gressive Resistance, Wren Tiffany

Theses and Dissertations

As part of the 2025 VCUarts MFA Thesis Exhibition at the Institute of Contemporary Art (ICA) at Virginia Commonwealth University (VCU), I transformed the 'Sponge' gallery on the top floor of The Anderson, VCU’s historic thesis exhibition home, into The Green Room, a neon green, immersive video and performance space featuring mirrors, disco lights, a foam tile dance floor, makeup stations, and a functioning green-screen editing suite. This hybrid drag rehearsal and ‘Chroma-key’ green video production room deepened both my understandings of Queer performance art and process-based art making during the Spring of 2025, through two public performance activation …