Digital Commons Network^™

Unleashing Serine Palmitoyltransferase In Test Tubes And Mice, Matthew W. Peart

Theses and Dissertations

Canonically known both for structural contributions to lipid bilayers and roles in cell signaling, the sphingolipids comprise a dynamic, multifaceted class of molecules which are studied to understand homeostatic cell biology as well as pathophysiology. Sphingolipids contribute to tissue-specific structures such as myelin, a multilayer membrane that allows for rapid conduction of action potentials along neuronal axons. All sphingolipids are downstream products of the rate-limiting and initiating enzyme in the de novo sphingolipid synthesis pathway, Serine palmitoyltransferase (SPT). Demonstrative of its status as the enzyme that catalyzes a crucial step in a biochemical pathway, SPT activity is strictly regulated. This …

Intuitive Mixed Reality Interfaces For Creative And Interactive Robotics: Roboart, Magnaforma, And Playmeow, Miles Popielamc

Theses and Dissertations

This thesis details the development and application of intuitive Mixed Reality (MR) interfaces designed to broaden access to robotic control for creative and interactive uses. The central contribution is the RoboART system, a novel MR interface built with the Microsoft HoloLens 2 to program an ABB GoFa collaborative robot for non-expert users, such as artists. The work describes RoboART's application in the Magnaforma project, where it enabled complex artistic expression.

Additionally, the thesis introduces the PlayMeow project, which explores adaptive pet interaction through a laser-guided turret. This system's control strategies were deeply informed by the intuitive paradigms developed for RoboART, …

Visible Modulation Of Epsilon Near Zero Materials, Jonathan M. Weber

Theses and Dissertations

While Epsilon-Near-Zero materials have offered many benefits from their introduction to the field of nonlinear optics, those materials have also narrowed the range of wavelengths often studied. With reliable and proven enhancements to light-matter interaction in the ENZ region, many researchers have had little reason to extend the spectrum measured in experiments. The purpose of this work is to measure the intensity dependent refractive index of Indium Tin Oxide across a broad spectral range, from ultraviolet to near infrared, to improve the understanding of semiconductor nonlinearities far from Lorentz and Drude resonances. Furthermore, the visible region is naturally low-loss in …

Brute Gamification, Catherine Chen

Theses and Dissertations

Digital platforms are surreptitious structures that gamify the ways in which we engage and exchange. They dictate every step of our journeys even as we navigate onward with a sense of absolute agency. The harder that we try to win, the more the platform will win!

In Brute Gamification, I employ image-based installation and performance to unravel the terms and conditions with which these platforms dictate our lives. A literal platform supports a series of image-games, all of which are about to end in a draw. Through prescribing the user to a designated path to focus on this non-ending as …

Exploring The Development Of Students' Calling To The Work Of An Hod Practitioner In An Undergraduate Hod Degree Program, Neil Dana Rahbar-Daniels

Theses and Dissertations

This dissertation project consisted of a multiple case qualitative study to explore indications of cross-influences between students’ experiences of learning takeaways as participants in one or more HOD undergraduate degree courses and accompanying experiences (if any) of perceiving and/or living a calling to work as HOD practitioners. This phenomenological inquiry involved four undergraduate students who had completed one or more HOD degree courses at Mid-Atlantic States University (MSU as a pseudonym) during a two-year period. Each participant attended a single interview of about 90 minutes in duration, responded to a short vocational calling survey as a guide for interview questioning, …

Profiles Of First-Year First-Generation Students’ Library Perceptions And Use: An Intersectional, Mixed Methods Study, Megan Hodge

Theses and Dissertations

To effectively support first-generation students, academic libraries must understand their needs. However, limited library research has been conducted into how these students, who often embody multiple structurally disadvantaged identities, perceive and use academic libraries or how their intersecting identities manifest in differing library needs. This study aimed to build understanding of first-year first-generation students’ perceptions and use of academic libraries. To do so, the researcher used an explanatory sequential mixed-methods design. First-year first-generation students at Virginia Commonwealth University were surveyed using Winkler and Sriram’s (2015) Academic Capital Scale and Anwar et al’s (2012) AQAK: Library Anxiety Scale for Undergraduate Students. …

Learning From Non-Stationary Data Streams, Gabriel Jonas Aguiar

Theses and Dissertations

The rapid growth of data from sources such as mobile applications, sensors, and network monitoring has increased the need for machine learning algorithms capable of handling non-stationary data streams. However, learning from such streams presents significant challenges due to their evolving nature and the presence of concept drift. One of the most complex issues is learning from imbalanced data streams, where shifting data distributions, combined with feature space drifts, complicate continuous adaptation. These challenges become even more pronounced in multi-class scenarios, which are common in real-world applications. Detecting concept drift in such contexts is particularly demanding, as it requires tracking …

Exploring Prenatal Cannabis Use Among Young Pregnant Bisexual Individuals: A Mixed Methods Study, Nicole Boss

Theses and Dissertations

The perinatal period is a critical time for health behaviors with outcomes that have short- and long-term effects for both childbearing person and child. Research indicates that young bisexual people are at greater risk of unintended pregnancy, experience psychosocial health disparities, and may be more likely to use cannabis during pregnancy. Few studies have examined this phenomenon. This study is a secondary analysis of mixed methods data from a longitudinal cohort study. Thematic analysis of qualitative data (n=12) revealed the contextual adaptivity of cannabis use, with participants explaining the situations and rationales which motivated their cannabis use changed over time. …

Molecular Mechanisms Of Kynurenine-Mediated Lifespan Regulation In Yeast, Ryan E. Counterman Jobb

Theses and Dissertations

The kynurenine pathway is a highly conserved pathway that acts as the primary pathway for tryptophan catabolism and has been found to be involved in lifespan regulation across many diverse organisms. Caloric restriction (CR) is the only known dietary intervention to date that both increases the mean lifespan and the health span of multiple organisms, although the molecular mechanisms of these effects are not fully understood. There are known and sometimes contradictory relationships between the kynurenine pathway activity and the life- extending effect of CR but the crosstalk between the two is not well characterized. Understanding these relationships could lead …

A Policy Analysis Of Performance Based Funding In Colorado, Nicholas G. Dix

Theses and Dissertations

The researcher used a quantitative approach to examine the effects of performance-based funding policies in Colorado. Specifically, the researcher focused on postsecondary access for Pell-grant eligible and underrepresented minority students. Using a doubly robust difference-in-differences design, the study compares two PBF policy iterations (2.0 and 3.0) to assess the effectiveness of those polices on public four-year degree granting universities in Colorado. The researcher assessed from the data that PBF has no significant impact on Pell-eligible postsecondary accessibility, but PBF has a slightly significant impact on URM accessibility.

The research is grounded in institutional theory and resource dependence theory. The research …

Teachers’ Perceptions Of The Effectiveness Of Tier 3 Academic Interventions, Dana Esposito

Theses and Dissertations

This applied dissertation was designed to discover teachers’ perceptions about the overall effectiveness of Tier 3 RTI services for resolving academic problems and teachers’ perceptions about transitioning students out of RTI. Students receiving services in Tier 3 of the RTI process often spend a considerable amount of time attempting to meet their goals. A search for answers to this problem, combined with a gap in the existing literature regarding time spent in Tier 3, led to the development of this study.

Data collection was acquired through a qualitative collective-case method focused on semi-structured interviews. Participants consisted of general and special …

Tech-Forward Learning: Text-To-Speech Impact On Catholic High School Students, Dennise A. Leyva

Theses and Dissertations

This phenomenological study was conducted to improve instructional support for diverse learners in a Southeast Florida Catholic high school by exploring teachers’ use of the Apple iPad accessibility feature, text-to-speech (TTS). Although this Catholic high school implemented a 1:1 iPad program, many teachers had limited experience using the built-in TTS feature to meet the diverse needs of students, including English Language Learners and those with reading difficulties. Teachers often used conventional approaches that failed to integrate assistive technology for inclusive and equitable learning.

The researcher conducted in-depth semi-structured interviews with six high school teachers to examine their experiences implementing the …

When They See Us: The Lived Experiences Of Bglo Members At A Pwi, Brittany Harris-Nelson

Theses and Dissertations

This applied dissertation explored the lived experiences of members of Black Greek-Letter Organizations (BGLOs) at a predominantly White institution (PWI) in the years following the COVID-19 pandemic. BGLOs have historically served as critical spaces for leadership development, cultural expression, and community support. However, within PWIs, these organizations often encounter systemic barriers related to visibility, funding, and institutional engagement.

The purpose of this study was to center the voices of BGLO alumni who graduated between 2020 and 2024 to better understand how they navigated their membership experiences during a time of social, institutional, and cultural transition. Using a qualitative research design, …

Effects Of Parent Involvement In Their Children’S Academic And Behavioral Performance, Megan Menozzi

Theses and Dissertations

This applied dissertation was designed to investigate the best practices to increase parental involvement in their children’s school activities by recording and scribing the experiences of certified teachers. Prior to this study, the current school experienced a decrease in parental involvement with their child’s scheduled school activities. As the school carry on with planning scheduled events for parental involvement, teachers were still expected to be prepared to implement curriculum in the classrooms, while ensuring children’s needs were being met by way of continuous communication with families.

The researcher developed a qualitative phenomenological approach. The design allowed the researcher to interview …

Foster Care Placement And Law Enforcement Contact, Tranika Guerrero De Los Reyes

Theses and Dissertations

Interaction with law enforcement and delinquency are higher among youth in foster care, and they are likely to experience higher incarceration rates and be involved in criminality, which limits their access to education and employment. The problem addressed in this study was the elevated risk of law enforcement contact outcome (LEO) among adolescents and young adults with a history of foster care placement. The purpose of this quantitative research was to investigate differences in the number of LEO contacts and LEO arrests based on foster care placement type among youth in California’s foster care system.

Guided by the social control …

The Impact Of The Annapolis Police Athletic League On Youth Crime Prevention And Police-Youth Relationships, Talia Carol Lisko

Theses and Dissertations

The Annapolis Police Athletic League (PAL) was established as an initiative to prevent juvenile delinquency by fostering positive relationships between at-risk youth and law enforcement. The study explored the effectiveness of the PAL program using a generic qualitative research approach informed by the CIPP evaluation model. Semi-structured interviews with police officers and volunteer mentors involved in the program provided insight into the program’s implementation, outcomes, and its influence on youth crime prevention in the Annapolis community. The findings from this study contribute to a deeper understanding of community-based crime prevention and the role of law enforcement in promoting pro-social attitudes …

Unrestrained Voices: A Qualitative Thematic Analysis On Formerly Incarcerated Trans People’S Perceptions Of Safety During Incarceration, James Anthoney Crawford

Theses and Dissertations

Heightened risks of violence, discrimination, and insufficient institutional protections mark the experiences of incarcerated trans individuals. This qualitative thematic analysis investigated the perceptions of safety among formerly incarcerated trans people within U.S. correctional facilities. Using qualitative research methods, the study gathered firsthand accounts of physical and sexual assault, examined institutional responses to reported incidents, and assessed the effectiveness of the Prison Rape Elimination Act of 2003 in addressing the unique vulnerabilities of trans inmates. Data collection involved oral history transcript analysis, which was analyzed through thematic coding to identify patterns of institutional neglect, inadequate training of correctional staff, and systemic …

Law Enforcement And The Need For Mental Health Collaboration, Jacquline Gillins-Hatcher

Theses and Dissertations

This study examined the ongoing challenges and the necessity of enhanced collaboration between law enforcement agencies and mental health professionals in responding to mental health crises in the United States. Using a constructivist grounded theory approach, qualitative data were collected through semistructured interviews with law enforcement officers and mental health professionals, along with an analysis of existing records and policies.

Findings highlighted that crisis intervention team training improved officers’ ability to manage crisis situations. However, barriers such as limited interagency coordination, funding constraints, leadership challenges, and systemic policy gaps continued to hinder effective collaboration. Data from this research indicated that …

Exploring Teacher Self-Efficacy And Best Practices Of Teacher Preparation Programs To Teach The Science Of Reading, Tonya Robinson-Mcnair

Theses and Dissertations

This dissertation investigated the content of teacher preparation programs to assess whether they integrate the science of reading and effectively equip English Language Arts teachers to instruct children in reading. Researchers have long examined the decline in national reading scores, identifying contributing factors such as the structure and content of teacher training programs. While many reading educators undergo formal training, these programs often lack a foundation in scientific research to support effective instructional methods. A teacher's confidence in teaching reading is influenced by both their preparation program and in-service training. However, many educators lack essential pedagogical knowledge and an understanding …

Abduction Prevention Intervention For Children With Autism: Behavioral Skills Training With In-Situ Parent-Led Training, Kelli N. Spencer

Theses and Dissertations

This applied dissertation was designed to review the efficacy of parents of children with autism as interventionists to prevent their children’s potential abduction. Oftentimes, abduction prevention strategies are not implemented due to time, staff, and resource constraints. While there have been effective interventions conducted, many did not address the unique needs of individuals with autism or the lack of qualified interventionists. The researcher implemented a behavioral skills training model based on the previously effective abduction prevention research and integrated the in-situ component with parents as primary interventionists.

The researcher conducted a behavior skills training, the instructional portion of which included …

An Interpretative Phenomenological Study Of Sexual Assault Investigations In Sexual Assault Response Teams (Sarts), Caitlyn Marie Clark

Theses and Dissertations

This applied dissertation was designed to provide further insight into sexual assault investigations and response from the lived experiences of Sexual Assault Response Team and Task Force criminal justice professionals. There has been limited research on Sexual Assault Response Teams (SARTs), Multidisciplinary Teams (MDTs), and Sexual Assault Task Force (SATF) units, specifically encompassing the lived experiences of their members. This interpretative phenomenological study sought to explore these collaborative multidisciplinary teams from the lived experiences of the criminal justice professionals who represent them and to analyze the factors of sexual assault investigations and response that these members find significant.

In this …

Examining A Year One Sor Implementation: A Mixed-Method Study Of Teacher Experiences And Student Literacy Scores, Christine Litzinger

Theses and Dissertations

With increasing national and legislative mandates prioritizing SoR practices, many schools are shifting their literacy practices to align classroom instruction, interventions, and screening to follow reading research, which can require a shift in pedagogy for individual educators and schools. This exploratory sequential mixed-methods study explored a year one implementation of the Science of Reading (SoR) in a mid-size midwestern school district during their first year of across-district literacy reform. Qualitative case study interviews were conducted of K-3 Classroom teachers (4) and literacy coaches (4). Emergent themes from the findings included value in high fidelity professional development, challenges related to resource …

A Math Teacher’S Reflexive Journey Into The Opportunity Gap, Richard A. Ball Iii

Theses and Dissertations

This multiple case study sought to determine what educational factors, if any, impacted Black students in a public school located in the South-eastern United States, to enroll in a lower-level math course. The study also aimed to view the mathematical identities of these students and have myself reflect on my practice both locally and globally. This, however, is a result of the Problem of Practice, the opportunity gap. H. Richard Milner’s (2012) opportunity gap framework served as the theoretical framework for this study and for which all findings were situated. The data was analyzed using deductive coding, with the elements …

Battery Energy Storage, Control, Dc Microgrid, Integrated Power Systems, Power Electronics, Supercapacitor, Jack Elliott Hannum

Theses and Dissertations

DC distribution has enabled a variety of new features and opportunities for naval power systems. At the same time, pulsed loads are proliferating, and pose unique challenges to power systems, especially smaller systems like those onboard ships. Energy storage resources, including Battery Energy Storage Systems (BESS) and supercapacitors, can be used to compensate pulsed loads of varying frequencies with proper control. However, standard methods of frequency-based load allocation have only limited ability to integrate sources with diverse power and energy capabilities. To overcome this limitation, a new droop control scheme, Frequency Targeting Droop (FTDC), has been devised that increases the …

Multirotor Aerial Vehicle Morphology Design, Modeling, And Control, Samuel Allen Dauchert

Theses and Dissertations

Multirotor aerial vehicles (MAVs) have seen explosive popularity since the early 2000s, with microprocessors enabling small-scale Autonomous Aerial Vehicles (AAVs) or First Person Aerial Vehicles (FPVs). Additionally, the use of these MAVs in commercial applications has continued to grow since then with expansion into delivery, search and rescue, and smart farming applications. With this rise in popularity, specialized MAVs have undergone development for these applications due to the environments in which these vehicles operate.

From this development, a new area of Morphological Multirotor Aerial Vehicles (MMAVs) has emerged. Unlike traditional MAVs, these platforms adjust their shape based on environmental factors. …

Inherited Wounds: Navigating Intergenerational Trauma Through Cooperative Play, Ayza Sheikh

Theses and Dissertations

'Strength' for Pakistani women is often defined as compromise, sacrifice, and silence. This definition has shaped intergenerational struggles in which women's self-narratives are constructed through suppression. Inherited Wounds seeks to address the trauma of suppression by creating a safe space for expression that fosters reflective and emotion-driven dialogue between Pakistani mothers and daughters.

Using interactive storytelling and embodied play, I developed a choice-based, narrative-driven video game and accompanying gesture-based controller. The game unfolds across childhood, marriage, and motherhood, mirroring the cycle of intergenerational struggle. Navigating choices in the game requires physical, intimate cooperation. The game uses the protagonist’s life as …

An Adaptive Method For Covariate Balancing In Block Randomized Clinical Trials, Ren Rasnick

Theses and Dissertations

Clinical trials are randomized in part to limit allocation bias, but also to ensure comparability between treatment arms for a baseline variable of concern. Comparable with regard to a baseline variable of concern is necessary for the validity of statistical methods. However, comparability is not guaranteed for trials of any size and is even more likely in trials with < 200 total participants. We propose a new method for adapting the allocation of participants in a sequentially allocated two-armed study with a small sample size to better ensure comparability.

The proposed method calculates the expected final imbalance (lack of comparability) based on the current participant values. Unlike several other methods, our method ensures the final desired sample size for each treatment arm, utilizes the expected final imbalance, increases comparability between …

Perceptions Of Victims On The Influence Of Domestic Violence Programs On The Decision To Leave, Tiffany Kleiman-Bourdeau

Theses and Dissertations

Dating back to earlier times, domestic violence was referred to as marital disputes and was not even considered a crime by law enforcement. However, that has since changed and now individuals are convicted for such crimes against another person. There are several treatment plans and options for these abusive individuals to take to receive the help they need to refrain from being abusive towards others, but what of the victims? What programs and/or services are available to them? Do these services even help the victims? This Idea Paper will examine the effectiveness of the programs and services available to domestic …

An Exploratory Investigation Of The Impact Of Psychological Intimate Partner Violence On College Women: A Qualitative Study, Dana Juel Conzemius-Schindler

Theses and Dissertations

Researchers have found psychological intimate partner violence (P-IPV; defined as emotional and verbal abuse utilized to degrade, demean, create fear, control, or isolate; Tolman, 1989; Sullivan et al., 2012) is detrimental to mental health functioning, including increased sexual risk behaviors, depressive and anxious symptomology, and relationship dissatisfaction (Hellemans et al., 2015; Overstreet et al., 2015). Despite this, little is known regarding the academic and psychological lived experiences of survivors of P-IPV. Therefore, the current study sought to qualitatively explore the lived experiences of female-identified students exposed to psychological intimate partner violence while in college. Through a Consensual Qualitative Research (CQR; …

Substrate Preference And Foraging Behavior Of Two Declining Warblers In Appalachian Shrublands, Samantha Fishman

Theses and Dissertations

Abstract Shrubland and early successional habitats (ESH) support a diversity of wildlife, including many declining songbirds. However, nonnative shrubs increasingly dominate these habitats, potentially altering habitat quality by influencing prey availability. Habitat quality can be assessed by observing foraging behaviors of songbirds and identifying preferred and avoided substrates as well as testing the predictions of optimal foraging theory; specifically that birds will maximize their energy gain relative to the costs. We examined foraging behaviors of Golden-winged Warblers (Vermivora chrysoptera; GWWA) and Chestnut-sided Warblers (Setophaga pensylvanica; CSWA) in ESH on private lands in Virginia with varying amounts …