Interference Under Pressure: Task-Switching And Cognitive Control In Adhd, Rocio Belen Varela

Theses and Dissertations

Attention-Deficit/Hyperactivity Disorder (ADHD) is a widespread neurodevelopmental condition associated with significant academic difficulties, often resulting in students scoring a year below average on standardized examinations (Lawrence et al., 2020; Mohammadi et al., 2019). A proposed core feature of the disorder involves impairments in working memory (WM), specifically the Central Executive component responsible for attentional control (Alderson et al., 2013; Kofler et al., 2008). These WM operations are governed by two cognitive control modalities: proactive control (sustained, anticipatory maintenance) and reactive control (cue-driven, on-demand processing) (Braver et al., 2007). This quasi-experimental study investigated whether a natural tendency toward reactive control grants …

Program Evaluation: A Study To Evaluate A Traditional Suspension Program Versus An Alternate Suspension Program, Ruth Desronvil

Theses and Dissertations

In the United States, millions of students face out-of-school suspensions from public schools each year. Black and Hispanic students, in particular, are suspended at higher rates than their white peers (Cobb-Clark et al., 2015). Students miss class time and valuable learning, which widens the achievement gap between Black, Hispanic, and White students. Suspended students also face additional consequences, such as social alienation from schools and a higher likelihood of engagement in delinquency. Several programs seek to improve the effects of suspensions on students’ outcomes. In this dissertation response, I examine the effectiveness of one such program: an alternative suspension educational …

Don’T Hit Mommy! Associations Between Harsh Parenting And Aggression In Toddlerhood: The Moderating Role Of Temperament, Serah Betancourt

Theses and Dissertations

Physical aggression is known to be particularly common in toddlerhood. Further, harsh parenting practices and certain temperament traits in children have been found to be associated with aggressive behaviors. Recently, aggression has been demonstrated to be differentiated between provoked and unprovoked aggression. The current study examined early aggression and explored the mechanisms by which harsh parenting practices and temperament traits may predict different types of aggression and how that may also change depending on the stage of development in toddlerhood. That is, we proposed that harsh parenting would be more strongly associated with provoked aggression among toddlers with higher negative …

Mentoring Matters: A Phenomenological Study Of How Principals Support New Teacher Development And Retention In Inner-City Catholic Schools, Helena Castilla-Byrne

Theses and Dissertations

The purpose of this qualitative study is to examine the lived experiences surrounding the phenomenon of being a new teacher in an inner-city Catholic school by looking at teachers’ professional learning and development to facilitate the new teacher’s retention, growth, well-being, and success in inner-city Catholic schools through the lens of the school principal leading them. According to the National Education Association, 55 percent of educators are thinking about leaving the profession earlier than they had planned (Walker, 2022). With many new teachers leaving the profession within the first few years, schools must find ways to support and retain them. …

Vulnerable Narcissism In Borderline Personality Disorder: Impact On Emotion Dysregulation, Identity Disturbance, And Rejection Sensitivity In Psychiatric Inpatients, Lauren Baker Lloveras

Theses and Dissertations

Borderline personality disorder (BPD) is a severe personality disorder frequently seen in clinical settings due to high service utilization. It is characterized by emotion dysregulation, identity disturbance, suicidal behavior, fear of abandonment, and impulsive or risky behavior. BPD is categorized as a Cluster B personality disorder, alongside narcissistic personality disorder (NPD), which is defined by grandiosity, attention-seeking, and a lack of empathy. NPD can be further conceptualized across two subtypes: grandiose narcissism and vulnerable narcissism (VN). Unlike grandiose narcissism, VN has been largely neglected in research – despite overlapping features with personality and mood disorders, especially BPD. These shared features …

Prevention Of Inflammation-Associated Neurodegeneration: Assessing The Efficacy Of N,N-Dimethylacetamide (Dma) In Lipopolysaccharide (Lps)-Induced Neuroinflammation Using C57bl/6 Mice, Teeshavi Devi Acosta

Theses and Dissertations

Neurological function is closely linked to both longevity and quality of life. While some degree of neurodegeneration occurs naturally with aging, pathological neurodegeneration leads to devastating functional decline. The mechanisms underlying these processes remain incompletely understood; however, neuroinflammation is recognized as a key driver of neuronal dysfunction and death. Emerging evidence indicates that neuroinflammatory cascades can precede and potentiate hallmark features of neurodegenerative diseases, including synaptic loss and cognitive decline observed in Alzheimer’s disease (AD). Activation of the NF-κB signaling pathway contributes to amyloid beta (Aβ) peptide production, further amplifying a cycle of inflammation and neuronal injury. Preclinical work from …

Finding, Founding, And Forging: Queer Formulations Of Family In Nineteenth-Century British Novels, Brian Hicks

Theses and Dissertations

This dissertation examines how nineteenth-century British novels imagine and negotiate queer formulations of family at moments when biological kinship, marriage, and inheritance were increasingly formalized as social and legal imperatives. Reading canonical texts by Austen, Shelley, Wilde, Brontë, and Hardy, alongside the proto-modern and modernist work of Joseph Conrad and Virginia Woolf, I argue that these novels resist consanguinity as the sole basis of family and instead theorize queer kinship as something found, founded, or forged through affinity, care, and shared orientation rather than blood or reproduction. Drawing on queer theory, feminist criticism, phenomenology, and Foucauldian accounts of power and …

Practicing Contemporary Documentation: An Analysis Of Historic Influences And Personal Inspirations, Zoee D. Rasso

Theses and Dissertations

For my Honors Thesis, I proposed and created a solo exhibition of my artwork, researching the inspiration behind this work to determine its place within in the context of contemporary art history. My work as an artist centers on stylized, psychologically charged portraits of birds. Looking at art history, birds as artistic subjects are historically rooted in documentation, from scientific illustrations and game paintings to ukiyo-e. Analyzing my own creative influences such as James Audubon, Walton Ford, and Safet Zec, this Thesis explores my artistic background and influences, examining how I have developed as an artist over my tenure at …

Album Production: A Pedagogical Tool In Collegiate Brass Performance, Alex Doolittle

Theses and Dissertations

This graduate research project investigates the value of musical album production within collegiate brass performance training and pedagogy. Within the collegiate sphere, brass pedagogy has long centered on live performance, such as juries, recitals, and ensemble participation as a primary performance tool; however, the 21st-century musical landscape is deeply rooted in technological and digital artistic dissemination. This study is used to push the boundaries of how technology can be interpreted in brass pedagogy by asking: How does album production function as a pedagogical tool in collegiate brass performance training?

In this project, I used an auto-ethnographic case study design, serving …

Analysis Of Risk Factors And Current Programs For Addressing Injuries In Children And Adolescents, Jahfel Nial Jones Iii

Theses and Dissertations

Unintentional injuries are a leading cause of morbidity and mortality among children and adolescents in the United States. These injuries result from various causes, including motor vehicle crashes, falls, suffocation, and poisoning. This capstone project examines the prevalence, risk factors, and prevention strategies for unintentional injuries among infants, children, and adolescents. Using a public health approach, this research explores evidence-based interventions and community-based programs that effectively reduce injury-related mortality. The project also incorporates data and insights from the Safe Kids Columbus program at Piedmont Columbus Regional, where various injury prevention initiatives have been implemented.

Findings revealed that motor vehicle crashes …

Ottoman Wikālas In Cairo: Islamic Architecture Beyond The Mosque, Yumna Moussa

Theses and Dissertations

This thesis traces one of the largest architectural typologies in Cairo: the wikāla, a type of urban caravanserai unique to Egypt. Estimated to have reached more than five hundred buildings by the 18^th century, the wikāla was the building of choice for most patrons in Ottoman Cairo. This study initially investigates the evolution of commercial architecture within the Islamic city. It then explores the defining architectural features of Cairene wikālas built between the 16^th and 18^th centuries—their plans, decorative/iconographic programs, and urban distribution—based on waqfiyyas, chronicles, travelers’ accounts, and photographic archives. Since many of …

On The Reasonableness Of Religious Belief According To W. James' "The Will To Believe" With Reference To Alvin Plantinga's “The Nature Of Necessity”, Maria Gadelrad Shenouda Nakhla

Theses and Dissertations

Analytically, I follow William James's approach in his paper "The Will to Believe" to demonstrate that holding a religious belief is reasonable and it is not incompatible with being a philosophy scholar. I do this through explaining the way James addressed the main obstacle that Clifford puts against belief (in general) which is ‘the lack of sufficient evidence’. Clifford claims that belief cannot be accepted without evidence on it.

James breaks apart this obstacle through many steps. First, analyzing the nature of belief itself, showing that belief cannot be attained based on intellectual grounds alone (which needs sufficient evidence), but …

Play-Based Learning In Private International Preschools In Cairo: Teachers' Perspectives, Kesha L. Stovall

Theses and Dissertations

This thesis explores how play-based learning is practiced and contextualized in private, international preschools in Cairo, Egypt through the perspective of teachers. It calls upon both historical and contemporary theories of play and play pedagogies ranging from the times of Plato and Al-Farabi to the 21st century with Montessori and Dewey. Using a contemporary theory of play presented by Stuart Lester and Wendy Russell as a guiding framework, it examines how play and play-based learning are implemented, shaped and even challenged in a Cairene context. These contexts include sociocultural factors such as parents’ expectations and aspirations, institutional barriers, teacher development …

Neoliberalism In Education: Three Studies On The Intersection Of Neoliberalism, Science Of Reading, And Policy, Candace Bechtold

Theses and Dissertations

This dissertation consists of three linking projects that study the intersection of neoliberal ideology, American education policymaking, and the Science of Reading (SOR). I sought to understand how neoliberal mechanisms like standardization and accountability have shaped past and current education policies in the United States. In the first project, I take an historical approach to conceptualize neoliberal ideology to explain how it is manifested in Standards-Based Accountability (SBA) reform and demonstrate how its implications have progressed over time. In the second project, I focus on one state's SOR policy–the Virginia Literacy Act (VLA)– to conduct a discourse analysis of documents …

Ontological Runtime Monitoring For Mission Engineering, Alexander R. Will

Theses and Dissertations

The advent of the Urban Air Mobility (UAM) concept will bring low-altitude aviation to civilians through passenger and cargo transport. However, the prospective vehicles in UAM studies are predominantly autonomous, raising questions about their efficacy and stability in densely populated urban areas. At the same time, extensive work has been performed to define a new branch of systems engineering that focuses on runtime behavior, synchronization, communication, and task allocation.This field is known as "mission engineering". Mission engineering has been deployed in military scenarios to model human-autonomy cooperation. By applying the concepts from this field to UAM, full systems-of-systems can be …

Propensity Score Matching Accounting For Longitudinal Trends Before Baseline With Group-Based Trajectory Modeling, Dustin R. Bastaich

Theses and Dissertations

Propensity score matching is used in observational studies to balance baseline attributes between a treatment of interest and a control group. Propensity score matching typically relies on baseline variables, but longitudinal trends in patient characteristics can also influence treatment decisions and subsequent health outcomes. This dissertation extends standard approaches by explicitly incorporating longitudinal trajectories of key variables into the propensity score estimation process.

Trends in a longitudinal variable prior to baseline were characterized using group-based trajectory modeling. A two-step modeling approach was implemented where trajectory groups of a key variable were first estimated and then included as covariates in the …

Designing For Trust, Transparency, And Public Understanding: Insights From Paul (The Polling Monitor), Stacia Tipton

Theses and Dissertations

ABSTRACT

DESIGNING FOR TRUST, TRANSPARENCY, AND PUBLIC UNDERSTANDING:

INSIGHTS FROM PAUL (THE POLLING MONITOR)

Stacia Q Tipton

A thesis submitted in partial fulfillment of the requirements for the degree of

Master of Product Innovation at Virginia Commonwealth University.

Virginia Commonwealth University, 2026

Director: William Benton, Program Director, Innovation, University College

Americans are curious about each other, despite the shouting matches, polarizing news and political ads made to outrage. When given the chance to find out what their fellow citizens think, most people take it. Traditional polling formats, including the industry's routine charts, percentages, findings and crosstabs, report what the public …

Examining Bidirectional Associations Between Mothers’ Beliefs About Emotions And Child Social-Emotional Outcomes, Sydney Sumrall

Theses and Dissertations

Social-emotional (SE) skills encompass the ability to recognize and regulate emotions, manage behavior to act on goals, and maintain social relationships (Abrahams et al., 2019). Parents play a crucial role in child SE skill development. According to theories of emotion socialization (ES), the beliefs parents hold about emotions shape parents’ ES behaviors, including teaching children how to understand and express feelings (Eisenberg et al., 1998; Gottman, 1996). Because emotion socialization practices are influenced by cultural values (Raval & Walker, 2019), the parent beliefs and ES strategies that best support children’s SE skill development may vary across families’ racial backgrounds. Although …

Mathematical Models With Clinical Applications For Improving Health Outcomes, Helen Harris

Theses and Dissertations

In clinical settings, patients are exposed to many risks and stressors that could result in adverse health outcomes. Here we present mathematical models that seek to address these risks. First, we present a Markov Chain model to investigate the effect of medication reconciliation (MR) completion on patient health outcomes in the intensive care unit. Using this model, we simulate the annual incidence of adverse drug events (ADEs) for three different ADE rates. Based on the simulated results, we conduct a cost-benefit analysis for various levels of compliance to determine the financial implications of increasing MR completion depending on the baseline …

Absolute Quantification And Identification Of Rna From Rna-Lipid Nanoparticles Using High Resolution Mass Spectrometry, Jason C. Funderburk

Theses and Dissertations

RNA therapeutics are a rising drug category with potential use for a range of conditions encompassing infectious diseases to therapies for cancer, diseases, and genetic disorders. RNA-lipid nanoparticles (RNA-LNPs) are the prominent delivery method for these therapeutics approved products include mRNA vaccines and polyneuropathy treatments. The emergency use authorizations and orphan drug status of current RNA-LNP drugs has allowed approval without finalization of the regulatory analytical procedures for quality monitoring. The objective of the study was to develop an LC-MS assay to simultaneously measure identity and concentration of two therapeutically relevant intact RNA constructs extracted from RNA-LNPs to enhance quality …

A Framework For Digital Energy Modulation And Translation In Projectional X-Ray Imaging, Richard R. Wargo

Theses and Dissertations

In projectional X-ray imaging, acquisition energy fundamentally influences subject contrast, image noise, and radiation dose. While dual-energy techniques exploit spectral differences to optimize contrast and enable material separation, acquiring multiple images of the same anatomy often requires additional exposures and increased system complexity.

This dissertation presents a framework for digital energy modulation (DEM), in which computational models are trained to translate projection images between energy domains without requiring additional X-ray acquisitions. DEM is conceived as a generalizable strategy for controlled contrast modulation in projection imaging, with potential applications in image optimization, radiation therapy alignment, and dual-energy applications.

The framework was …

Proof Of Recovery: A Model To Enhance Data Integrity In Data Management Systems, Gustaf Barkstrom

Theses and Dissertations

Businesses lose millions of dollars every year when they can’t restore data from backups. Research shows that Disaster Recovery Plan (DRP) testing is not conducted frequently enough, nor are records maintained that demonstrate full data recovery from backups. This work introduces a design science artifact called PRTOK that aims to increase DRP testing. The design science artifact is a software solution that integrates with Data Management Systems (DMS)

such as iRODS and DSpace, and can work with formats such as HDF5 and BagIt. Proof-of- recovery records, or tokens, are recorded in a replicated, resilient, and indelible proof-of- authority blockchain data …

In Search Of The Soul Of Creativity: Authorship, Agency, And Meaning In Refractive Collaboration With Generative Ai, Fatima Nazir

Theses and Dissertations

When images can be generated in seconds, what remains uniquely human in the act of creation? In Search of the Soul of Creativity: Authorship, Agency, and Meaning in Refractive Collaboration with Generative AI investigates where authorship, agency, and meaning reside within design practices mediated by generative AI. Rather than using AI to produce predictable results, this research deliberately relinquishes control to observe how generative systems interpret language through their own learned associations. Through a practice-led investigation across four generative models within the Higgsfield platform, user prompts were progressively shortened from full sentences to single words, revealing recurring patterns and cultural …

Magnetic Resonance Only Planning Validation Using Synthetic Ct By Mvision, Eric D. Brass Sr

Theses and Dissertations

Problems: Adaptive radiotherapy requires clinically practical methods for responding to patient-anatomy changes that occur between the original planning images and the day of treatment delivery. Registering a previously acquired computed tomography scan to a newly acquired magnetic resonance image can introduce cross-modality uncertainty and may delay replanning. This thesis evaluates whether synthetic computed tomography generated from same-day magnetic resonance imaging can reduce registration-related uncertainty while supporting rapid dose recalculation for fraction-level adaptation.

Procedure: Magnetic resonance imaging DICOM data were exported from the ViewRay MRIdian treatment planning system and uploaded to MVision for synthetic computed tomography generation. The synthetic computed tomography …

Development Of A Practical Lu-177 Activity Calibration Protocol For Clinical Nuclear Medicine: Dosimetric Impact Analysis And Implementation Tools, Azam Almolaiki

Theses and Dissertations

Lutetium-177 (Lu-177) is widely used in radionuclide therapy, where accurate activity measurement prior to administration is essential for safe and effective treatment delivery. However, variability in dose calibrator response due to measurement conditions and source geometry remains a practical challenge in routine clinical settings. This study presents a practical clinical calibration strategy under real-world constraints for Lu-177 activity measurement using standard nuclear medicine instrumentation. A vial-based approach was implemented using a well-type ionization chamber (Capintec CRC-15R) to evaluate measurement repeatability, temporal stability, and geometry dependence. All measurements were performed under consistent conditions with appropriate decay correction applied using the physical …

Characterization Of Microrna Expression In Neuron-Enriched Extracellular Vesicles During Early Life, Allison Molen

Theses and Dissertations

Extracellular vesicles (EVs) are membrane-bound sacs released by cells that carry molecular cargo reflective of their cell of origin. EVs enriched using L1 cell adhesion molecule (L1CAM) as a marker of putative neuronal origin can cross the blood–brain barrier and provide a minimally invasive window into brain-related processes. Exosomal microRNA (miRNA) regulate gene expression and have been implicated in psychiatric disorders, including major depressive disorder (MDD). However, measuring and analyzing miRNA from L1CAM-positive EVs presents substantial analytical challenges due to low abundance and sparse detection across samples.

Plasma samples from participants recruited through the Mid-Atlantic Twin Registry (MATR) were used …

A Qualitative Analysis Of Teacher-Report Modifications Of A Tier 2 Evidence-Based Program In Elementary Schools After Implementation Supports Are Withdrawn, Navneet Kaur

Theses and Dissertations

Growing literature emphasizes the importance of examining modifications (i.e., responses to unforeseen challenges and deliberate changes to a program) made by implementers to understand the long-term outcomes of evidence-based programs (EBPs), particularly after formal implementation supports, such as training and coaching, are withdrawn. Although prior research has documented that they occur during implementation, less is known about whether modifications occur once external supports are no longer available, and if so, what types of modifications are made, and the rationale for them. This gap is especially salient in school settings for teacher-delivered interventions. To address this gap, this study used semi-structured …

Pingbongbilladingdong: Abjection And Comedy In Art, Leroy A. Winter

Theses and Dissertations

As of late, my work has dealt with themes of collapse and comedy, pertaining specifically to faded ideals of individualism in art. My thesis installation, titled Pingbongbilladingdong, is a testament to this tension, portraying a reconstruction of the disheveled chaos of the artist’s studio. In this paper, I use this installation as a means to further explore the ways that abjection and comedy intersect in art, and how myself and others repurpose the faded glamor of Ab-Ex as a means to probe this overlap. Serving as an allegory for my experience with the studio, Pingbongbilladingdong presents an image of the …

Nanomagnet Based Straintronic Devices For Unconventional Computing: Simulation And Performance Analysis, Rahnuma Rahman

Theses and Dissertations

Nanomagnetic devices are of great interest in digital hardware because of their non-volatility and dynamic ability to change magnetization but suffer from high switching error rates and temperature sensitivity. Magnetostrictive nanomagnets that utilize strain to switch between stable magnetization states encoding bit information are of interest since they are extremely energy efficient as piezoelectric layers can be used to rotate magnetization that have switching energies in the range of attojoules. Their stochasticity can also be useful in probabilistic, analog, neuromorphic, and collective computing systems, where occasional switching errors are not devastating. The dissertation extends spintronics beyond conventional computing schemes by …

Commissioning & Daily Qa Of Converted Linac For Electron Flash, Tomaj Javidtash

Theses and Dissertations

Ultra-high dose rate (FLASH) radiotherapy has demonstrated promising normal tissue sparing in preclinical studies; however, the lack of standardized dosimetry, commissioning, and quality assurance (QA) methodologies remains a major barrier to its reproducible and safe implementation. In particular, conventional clinical commissioning and QA protocols are not directly applicable at FLASH dose rates due to challenges associated with detector response, dose-per-pulse effects, and beam control limitations.

This thesis presents the commissioning of a converted Varian 21EX linear accelerator for electron FLASH operation within the Division of Medical Physics at the Virginia Commonwealth University (VCU) Department of Radiation Oncology. Comprehensive beam characterization …