Digital Commons Network^™

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 …

Identifying Mobility Hub Suitability In The Mid-Sized United States Urban Area Using Weighted Overlay And Percentile Based Local Peak Analysis, Eric Asplund

Theses and Dissertations

IDENTIFYING MOBILITY HUB SUITABILITY IN THE MID-SIZED UNITED STATES URBAN AREA USING WEIGHTED OVERLAY AND PERCENTILE‑BASED LOCAL PEAK ANALYSIS

By Eric Asplund

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Urban and Regional Planning at Virginia Commonwealth University.

Virginia Commonwealth University, 2026.

Major Director: Dr. Ivan Suen, Ph. D., Associate Professor, Faculty of Urban and Regional Studies and Planning

Shared mobility hubs are increasingly posited in transportation planning as interventions supporting multimodality, sustainability, and equitable access, but guidance on evaluation of potential hub locations remains uneven, particularly in mid-sized United States cities where …

Environmental Monitoring In Shallow Lakes: Public Health Threats In Urban Waters, Kyleigh E. Johnson

Theses and Dissertations

Lakes are an integral part of urban and suburban communities, providing ecological, recreational, and public health benefits. Many of these lakes are located in densely populated areas and are subject to urban influences on water quality. Algal toxins and Escherichia coli are two common recreational concerns. Algal toxins come from harmful algal blooms that are influenced by nutrient availability and temperature, while bacteria are often introduced through run-off and animal waste. Sampling every 3-4 weeks from May-October 2025 allowed for the assessment of seasonal patterns and site-specific differences across nine lakes in the Richmond area. The highest bacterial concentrations appeared …

Techniques For Inclusive College Mathematics Classrooms, Christopher Anderson Davis, Josh Hiller, Anil Venkatesh

Journal of Mathematics and Science: Collaborative Explorations

Creating a welcoming and inclusive mathematics classroom is an important responsibility for all college mathematics faculty. But where do we begin? In this paper we present several techniques based on White’s (2024) building inclusive classrooms strategies framework, which the authors have found to be successful in making their own classrooms more inclusive. The techniques include the inclusion of contemporary diverse voices, exploring the history of applications of mathematical concepts, elevating the diverse intellectual history of mathematics, bringing diverse guest speakers into the classroom, and mentoring students as they engage in doing research. For each strategy we provide narrative comments based …

Connections Between Mathematics And Chemistry: An Interdisciplinary Undergraduate Curricular Initiative, George Ashline, Bret Findley

Journal of Mathematics and Science: Collaborative Explorations

In this article, we describe an undergraduate curricular initiative involving mathematics and chemistry faculty and students. Supported by a grant from the National Science Foundation Scholarships in Science, Technology, Engineering, and Mathematics Program, a program designed to encourage the study of and connections between quantitative fields and life sciences, this interdisciplinary collaboration features undergraduate student research and involves the development of curricular connections between mathematics and chemistry. Through this initiative, we have created activities for calculus courses featuring chemistry applications as well as activities for chemistry courses showcasing mathematical concepts. After the implementation of these curricular enhancements, we gathered student …

Exploring Recruitment And Retention Of Mathematics Teachers In Southwest And South-Central Virginia, Anthony Dove

Journal of Mathematics and Science: Collaborative Explorations

This study examines the recruitment and retention of secondary mathematics teachers in rural southwest and south-central Virginia public schools from the perspectives of school principals. Guided by three research questions focused on retention, recruitment, and opportunities for improvement, the study employed a constant comparative analysis of semi-structured interviews conducted with principals from 10 rural middle and high schools. Findings indicate that many schools have historically benefited from long-term teacher retention reinforced by strong community ties and supportive school environments. However, anticipated retirements, salary competition within the region, and increasing challenges in recruitment are beginning to place strains on schools. Principals …

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Journal of Mathematics and Science: Collaborative Explorations

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Growing With Purpose: An Organizational Life Cycle Analysis Of Capacity, Strategy, And Client Centered Practices, Jackie Robinson Brock, Stacy Wilson, Yadira Guerrero-Adams

Doctor of Education Capstones

Single parent families and the costs associated with child care are on the rise. The burden of single parenthood and child care costs is not limited to financial strain; emotional and psychological stressors create an additional “burden of care” (Ha et al., 2015) that is a significant factor in single-parent households. The capstone project team worked with a Virginia-based nonprofit dedicated to supporting middle income single parent families experiencing an undue burden of financial hardship amid rising child care costs. The capstone project team used an improvement science approach (Hinnant-Crawford, 2020), parallel convergent mixed methods, design, and the organizational life …

From Compliance To Connection: Advancing Authentic Community In Vcu Residence Halls, Sarah M. Ramkey, Keon Nesmith, Carly Croft

Doctor of Education Capstones

This capstone project examines challenges to authentic community building within Virginia Commonwealth University’s Residential Life and Housing (RLH) department. Although the Community Development Model (CDM) was originally designed to foster belonging through structured engagement, it has increasingly been perceived by frontline staff as a compliance-driven checklist rather than a tool to develop community. Using improvement science principles, this case study identifies outdated curriculum, misalignment with student needs, and disconnect between senior leadership and frontline staff as systemic barriers to building authentic community in RLH, including student residence halls.

We used a single-institution case study design. We conducted empathy interviews with …

From Arrival To Belonging: Strengthening The Transition For International Teachers In Prince William County Public Schools, Lisa V. Garcia, Jonathan D. Roberts, Zaida N. Morales

Doctor of Education Capstones

This capstone examines the transition of Ambassador Teachers (ATs), internationally recruited teachers working in Prince William County Public Schools (PWCS), and the challenges and supports that shape their first year. The capstone investigates what most influences ATs’ overall experience, what challenges they face before arrival and throughout their first year, and what supports currently exist or are missing. The study draws on document review, empathy interviews, an orientation observation, a literature review, and survey data from 148 Ambassador Teachers. Findings indicate that ATs experience the greatest challenges in housing, transportation, financial stability, navigating U.S. culture, handling discrimination, and adapting to …

History Is Durable: A Mixed-Methods Study Exploring Stakeholder Perceptions Of The Degree And Career Relevance, Hala Al-Tinawi, Damali Curry, Tonya S. Hall, Sharrie A. Merritte

Doctor of Education Capstones

Declining undergraduate enrollments in history departments reflect a national trend that many institutions have struggled to reverse. This capstone project, conducted in partnership with the Virginia Commonwealth University Department of History (VCUDOH), examines a specific and addressable dimension of that challenge: a communication gap in how the career value of a history degree is conveyed to students in introductory-level courses. Using improvement science principles and a mixed-methods case study design, the capstone team investigated how introductory history instructors communicate durable skills and career applicability, how students perceive the relevance of introductory history coursework to their career plans, and why students …

Interrupting Inequity: A Systems Change Approach To Reducing Discipline Disproportionality, Jesse Raymond Ault, Jacqueline Theresa Barber, Tara Alexis Hodges, Brittnei Nicole Mckeithen-Barnes, Marleny Perdomo

Doctor of Education Capstones

Disproportionate discipline in public schools remains a persistent and complex challenge, particularly for Black and Hispanic students, male students, and students with disabilities. This capstone project examined patterns of racial discipline disproportionality within a large, suburban school division, referred to throughout the project as Polaris County Schools (PCS), to better understand the systemic conditions contributing to these disparities. Using a mixed-methods approach grounded in the Public Education Leadership Project (PELP) framework, the research team conducted document and literature analysis, school board observations, partner consultations, and a review of disaggregated discipline data. The team also engaged in external interviews with experts …

Understanding Student Non-Use Of Vcu's Cabell Library Through Ecological Systems Theory: A Mixed-Methods Study, Tracy D. Booker, Ethan L. Carter, Joshua C.J. Lockhart, Margaret E. Mcdearmon, Jessica S. Watson

Doctor of Education Capstones

This study examined undergraduate students’ non-use of physical spaces and services within Cabell Library at a large, urban public university. While academic libraries are widely associated with student success, patterns of engagement remain uneven, with a subset of students not utilizing these resources at all. This study sought to understand which students do not use the library and why, with particular attention to identifying systemic barriers and opportunities to improve equitable access and engagement. Grounded in Ecological Systems Theory and informed by improvement science, the study employed a mixed-methods research design to capture both patterns of behavior and lived experiences. …

Southside Greening Plan: Leveraging Community-Based Partnerships To Foster Resilience In Richmond, Virginia, L. Nicole Roemer

Master of Urban and Regional Planning Capstone Projects

Southside is a frontline community within the City of Richmond that disproportionately experiences urban heat island (UHI) effect and stormwater flooding. Southside residents are vulnerable to climate change and have a low adaptive capacity for resilience, largely because of disinvestment and reduced access to greenspaces. This makes them more vulnerable to heat-related and respiratory illnesses, more likely to experience higher energy bills and less affordable housing, and more likely to be impacted by extreme weather. The city master plan Richmond 300: A Guide to Growth, adopted in 2017 (amended in 2021), acknowledges this context. However, community-based organizations (CBOs) struggle to …

Evaluating Tenant Education Programs At Portsmouth Redevelopment & Housing Authority, Jordyn Taylor

Master of Urban and Regional Planning Capstone Projects

This professional plan evaluates the effectiveness of tenant education programs offered by the Portsmouth Redevelopment and Housing Authority (PRHA) in Portsmouth, Virginia. The study incorporates both tenant and staff perspectives while acknowledging the historical and structural inequities embedded within public housing systems. It focuses on how existing programs support tenant empowerment, housing stability, and long-term self-sufficiency.

Findings indicate that while PRHA programs provide meaningful support to residents, there are notable gaps in accessibility, engagement, and program clarity. In response, this plan recommends enhancements that emphasize more structured, outcome-oriented programming, particularly in areas such as financial literacy, credit repair, and pathways …

An Indigenous Sovereign Approach: Developmental Strategies And Guidelines For The Berger-Patawomeck Preserve Trail Network, Lauren N. Usher

Master of Urban and Regional Planning Capstone Projects

This planning document serves the Patawomeck Tribe's cultural, environmental, and sovereign needs by providing research and recommendations to sustainably steward ancestral lands through integrated Indigenous and Western practices. The plan adapts sustainable design strategies to guide trail maintenance and activities within the Berger-Patawomeck Preserve, examining Traditional Ecological Knowledge (TEK) alongside Western practices. A decolonized, sovereign lens guided the mixed research methods drawing on legal, regulatory, planning, and ethical frameworks to strengthen tribal health, education, and sovereignty. The research explores local ecology, Indigenous culture, and implementational strategies. The ecological findings document the Preserve's sensitive resources, including the Coastal Piedmont transition zone, …

Richmond, Fredericksburg & Potomac Passenger Rail Performance And Ridership Study, Matthew S. Sturgis

Master of Urban and Regional Planning Capstone Projects

This study evaluates how targeted infrastructure and operational improvements could improve speed, reliability, and, by extension, ridership on the Richmond, Fredericksburg, and Potomac Corridor between Richmond Main Street Station and Washington Union Station. Although the corridor carries all 198 weekly Amtrak trains operating in Virginia over some portion, passenger rail remains materially less competitive than automobile travel on I-95 when compared under ideal travel conditions or by mode share. In 2024, the corridor carried 1,046,255 riders and held an estimated rail mode share of 2.4 percent relative to 42,598,057 vehicle trips on comparable I-95 segments. At the same time, average …

Marinship Park's Green Infrastructure Plan, Parris Hunt

Master of Urban and Regional Planning Capstone Projects

Marinship Park’s Green Infrastructure Plan looks to improve Marinship Park by adding amenities that promote community engagement and protect or help the environment. The background information mentioned in the plan is relevant to the history in the study area. The plan later discusses environmental conditions and problems that support why this plan is needed. The methods section is after the precedent plans, and it entails the research questions, stakeholder outreach methods, and analytical methods. The research method section states that case studies and surveys are the best ways to gather data and collect responses for the research questions. The real-life …

Rva Parkland Acquisition & Maintenance Strategy, Natalie E. Somerville

Master of Urban and Regional Planning Capstone Projects

Parks and green spaces offer myriad benefits to physical and mental well-being, environmental health, climate resilience, and community connection. Richmond, Virginia has added several new parks in recent years. However, there are still gaps between existing conditions and the City’s goal of having all residents live within a 10-minute walk of a quality park. The plan presents a land acquisition and maintenance strategy for future parkland expansion in the City of Richmond. Three questions guided the research: 1) which areas in Richmond are priority areas for creating new parks? 2) what processes should Richmond use to acquire land to expand …

Pilot Program For Telemental Health Access To Rural Underserved Localities, Traci Brickhouse Jones, Sarah Kott, Oswaldo Moreno, Aneida Winston

GEHLI - 2026 VCUL Team Project Publications

This proposal recommends legislation directing Virginia Department of Behavioral Health and Developmental Services to establish a two-year pilot program focused on expanding telemental health access in rural Virginia. The purpose of the pilot is to address persistent behavioral health disparities in areas where residents face major barriers to obtaining timely mental health care.

The legislation is designed to build on existing telehealth infrastructure and aligns with Virginia’s Statewide Telehealth Plan under § 32.1-122.03:1, which already supports broader use of telehealth services across the Commonwealth. By creating a focused pilot first, the state can test implementation strategies before considering broader expansion.

Unlocking Testing Potential: Establishing A Unified Testing Hub To Support Student Success, Pallavi Singh, Yonella Demars, Maggie Christ, Ewa Way, Lisa Domico, Karolina Aberg

GEHLI - 2026 VCUL Team Project Publications

This project evaluates the feasibility and strategic impact of establishing a centralized testing hub at VCU. By analyzing current practices, stakeholder needs, and peer models, the study aims to assess benefits such as improved testing integrity, accessibility, and operational efficiency. Findings will inform actionable recommendations for implementation, with the potential to enhance student success, reduce administrative burden, and position VCU in the forefront of secure, standardized academic assessment for both in-person and online education.

New Media For New Marijuana: An Initiative Addressing The Challenges Of A Changing Cannabis Landscape And Its Impact On The Driving Safety Of The Vcu Community, Kelsa Bartley, Peter Henry, Donisha Terry, Emily Yeaman, Quingguo Xu, Matthew Winheim

GEHLI - 2026 VCUL Team Project Publications

Cannabis products today are significantly more potent and more widely available than in previous generations, creating new health and safety challenges for college students. This project aims to develop an evidence-based awareness campaign that delivers information about the health risks of emerging cannabinoid products and the consequences of impaired driving due to cannabis use. The campaign aims to increase student awareness, encourage responsible decision-making, and contribute to a safer, healthier VCU community.

Social And Community Determinants Of Alcohol Use Among Hispanic/Latino College Students: The Role Of Early Adversity And Drinking Motives, Isis A. Garcia-Rodriguez

Theses and Dissertations

Background. Alcohol use remains one of the most prevalent health-risk behaviors among college students in the United States and is associated with a range of academic, physical, and psychological consequences. Hispanic/Latino college students navigate complex social and cultural environments that may influence alcohol use behaviors, including exposure to early-life adversity, sociopolitical stressors, and culturally grounded sources of resilience. Guided by the Healthy People 2030 Social Determinants of Health (SDOH) framework, this study examined how social and community context factors relate to alcohol use among Hispanic/Latino college students and whether drinking motives function as a psychological mechanism linking social experiences to …

Implementation Of Tg-351 Reference Dosimetry For A 6 Mv Photon Beam In An Mr-Guided Radiotherapy System, Nicholas A. Castellano Jr.

Theses and Dissertations

Magnetic resonance guided radiation therapy (MRgRT) combines magnetic resonance imaging (MRI) and radiation therapy to enable the visualization of anatomy in real time during treatment. The presence of a magnetic field in MRgRT affects charged particle radiation and detector responses, necessitating changes to traditional reference dosimetry procedures. The American Association of Physicists in Medicine (AAPM) Task Group 351 (TG-351) provides a formalism for reference dosimetry in MRgRT. In this study, the TG 351 formalism is used to perform reference dosimetry for a 6 MV flattening filter-free (FFF) photon beam from a Viewray MRIdian MR-Linac radiation therapy system. Beam quality determination, …

De Novo Protein Binding To Zinc Oxide Through Biomineralization Pathways, Jean-Mark A. Francis

Theses and Dissertations

De novo proteins are structurally distinct from proteins found in nature and thus capable of having their amino acid sequence modified to accomplish tasks such as increasing protein-nanoparticle binding without unfolding or decomposing. Zinc Oxide nanoparticles are functionally distinct from their bulk counterparts and are widely used as semiconductors in a variety of fields such as medicine and agriculture. With demand for these nanoparticles increasing, environmentally sustainable methods of Zinc Oxide nanoparticle synthesis are being investigated as an eco-friendly alternative to currently utilized but environmentally hazardous chemical and physical techniques. This research investigates the binding characteristics between Zinc Oxide nanoparticles …

Conceptual Concerns Regarding The Content Validity Of The Construct Of Gender Dysphoria In The Diagnostic And Statistical Manual Of Mental Disorders, Fifth Edition, Text Revision, Waverley Vesely

Theses and Dissertations

The diagnostic classification of gender dysphoria in the DSM-5-TR elicits a number of clinical, political, and philosophical concerns, ranging from those that are diagnostic and taxonomical in nature to those that fall within the domains of ontology, phenomenology, and hermeneutics. Part of the reason for the complexity of studying the diagnostic and nosological validity of gender dysphoria as an extant diagnostic classification is that, unlike many disorders, gender dysphoria is inextricably tethered to identity. While the recent change from gender identity disorder to gender dysphoria has nominally removed the status of disorder, in practice, both clinicians and the general population …

Examining The Impact Of Trauma-Informed Mindfulness Meditation On Posttraumatic Growth Following Interpersonal Trauma: A Randomized Controlled Trial, Margaret Poandl

Theses and Dissertations

Research on interventions designed to increase posttraumatic growth (PTG) among interpersonal trauma survivors is limited. The purpose of this study was to examine the impact of a six-week trauma-informed mindfulness meditation intervention on PTG. Additionally, I examined outcomes of posttraumatic stress (PTS) and loneliness, as well as analyzed the variables of dispositional mindfulness, hope, spirituality, and self-compassion to understand their potential role as mechanisms of change within the intervention on PTG. To answer these research questions, I conducted a randomized controlled trial study with 113 adults from a community sample who reported experiencing interpersonal trauma. Utilizing linear mixed modeling and …

The Relationship Between Symptom Catastrophizing And Sociocultural Factors Among Adults With Persistent Sympathetic Activation Syndromes, Whitney M. Redemer

Theses and Dissertations

Persistent Sympathetic Activation (PSA) has emerged as a potential unifying mechanism underlying a range of complex chronic health conditions yet remains poorly characterized within biomedical and psychosocial research. Limited research has delineated how PSA manifests across diverse populations or how diagnostic and sociocultural factors shape lived experiences of this phenomenon; thus, the objective of the present study was to examine whether diagnostic certainty – operationalized as provider-confirmed versus self-suspected PSA-related diagnoses – is associated with symptom catastrophizing, and whether this relationship varies as a function of sociocultural factors. Drawing on data from a larger study aimed at characterizing the lived …

Your Left Or Mine: A Journey To Accessibility For Learning Disabilities And Neurodivergence In Stage Combat Pedagogy, Ambria Campbell

Theses and Dissertations

This thesis examines stage combat pedagogy from its inception to the present day through the lens of accessibility for learning disabilities and neurodivergence. Relevant research in education as it relates to disability is analyzed and applied to the field of stage combat pedagogy. What follows is a deconstruction and reconstruction of beginning level stage combat pedagogy to increase accessibility. These ideas are then tested and the results reflected on. This thesis focuses on college level and aged students who are the most likely demographic for beginning stage combat students. The completion of this thesis does not represent an endpoint in …

Dimension Reduction Involving Exogenous Variables With Applications In Manufacturing And Healthcare, Linxi Li

Theses and Dissertations

High-dimensional data analysis presents diverse challenges, including the curse of dimensionality, the complexities of working with datasets that combine large feature spaces with limited sample sizes, and difficulties in identifying meaningful relationships among variables. As datasets grow in size and complexity across different fields, it is increasingly important to develop practical approaches for extracting essential information from such data. Dimension reduction methods address these challenges by alleviating the effects of high dimensionality, enhancing the ability to reveal hidden patterns, and uncovering latent structures within the data to support further analysis. Some methods reduce dimensionality while preserving all relevant information, offering …