Digital Commons Network^™

Alcohol And Other Addictive Behaviors Among Bariatric Surgery Patients, Rachel M. Arnold

Theses and Dissertations

Research has repeatedly highlighted a high rate of comorbidity of addictive behaviors in both clinical and non-clinical samples. While polydrug use has received significant attention in recent years, less is known about rates of comorbidity with behavioral addictions such as eating, work, exercise, or sex. Individuals with a history of bariatric surgery may provide a unique opportunity to examine the potential co-occurrence of addictive behaviors. High rates of food addiction symptoms and changes in alcohol use patterns post-surgically have highlighted a potential gap in our understanding of bariatric patients and their needs post-surgically. Using a composite measure of addictive behaviors, …

Characterizing The Patterns, Predictors, And Processes Involved In Recovery From Substance Use Disorders, Rebecca L. Smith

Theses and Dissertations

Alcohol and drug use disorders are associated with significant cost to individuals, families, and society.Approximately 40-75% of affected individuals remit from alcohol use disorders (AUD). Although the development of AUD is well studied, recovery from AUD and factors that contribute to recovery are not as well characterized. With the definition of recovery evolving towards a process rather than an outcome, there is a need to better understand psychosocial functioning and quality of life among individuals at different points in their recovery journeys. Concurrently, additional research is needed to understand the interplay between sources of recovery capital, individual differences in risk …

Biotic Characteristics Of Managed And Unmanaged Coastal Dunes In The Outer Banks, North Carolina, Andrew E. White

Theses and Dissertations

Under future climate change and sea level rise scenarios, Natural and Nature-Based Features (e.g., dunes) that protect coastal habitat and infrastructure will be exposed to increased wave energy and storm surge. Understanding how these forces will impact coastal dunes is necessary for their continued use as protective features. Coastal dunes develop through feedback between vegetation and sediment deposition, a process complicated by species-specific growth rates and responses to burial. Wave flume studies have tested the effects of dune vegetation on erosion and found multiple plant organs across several functional types to be important for resisting erosion. Although dune building and …

Impact Of The Covid-19 Pandemic On Child Anxiety Symptoms: The Influence Of The Caregiver-Child Relationship, Rebecca Hoppe

Theses and Dissertations

Research suggests that youth are dealing with a myriad of worries during the COVID-19 pandemic (Ellis et al., 2020), which highlights the need for investigations focused on child anxiety. However, to date little research has examined children’s anxiety in the COVID-19 pandemic nor the potential protective effects of the caregiver-child relationship. Therefore, this research aimed to contribute to the literature by investigating the influence of COVID-19 related stressors in younger children and leveraging children’s report of their own attachment security within their relationship with their caregiver and mental health. The current study used a national, quantitative survey of young children …

Comparison Of Peak Skin Dose Calculated By Patient Radiation Dose Monitoring And Tracking Systems Versus Solid-State Detector Measurements, Vincent D. Gargaro

Theses and Dissertations

This study aims to compare the Peak Skin Dose (PSD) that patients obtain from fluoroscopy procedures. The study will show the differences between the PSD measured and calculated from a solid-state detector and the values the unit is displaying. Also, the study will compare PSD measurements from Patient Radiation Dose Monitoring and Tracking Systems (PRDMT). Numerous parameters need to be obtained to depict the PSD that a patient is receiving accurately. The PSD is crucial in assessing the potential biological effects of radiation.

The formalization used to derive the calculated PSD in this study has been established by Jones, A. …

Rational Design Of Metal-Organic Frameworks (Mofs)-Based Functional Materials Towards Better Air Quality, Zan Zhu

Theses and Dissertations

Air pollution is a major threat to environmental safety and public health. Volatile organic compounds (VOCs), particulate matter (PM), and airborne microorganisms are three typical air pollutants. Conventional strategies to prevent and mitigate air pollution have been employed, which, however, are generally passive. For instance, VOC sensing through solid-state devices is a conventional approach, which, however, is not capable of capturing and removing VOCs. On the other hand, air filters and face masks are useful equipment to protect people from inhaling PM and airborne microorganisms. But most commercial filters can only capture them on the surfaces, which may cause secondary …

Race, Weight, Gender And The Embodied (Odied, Odied) Consciousness Of Big-Bodied Black Women Educators: A Phenomenological Study, Kendra D. Johnson

Theses and Dissertations

Big-Bodied Black women in the United States have perpetually navigated the veritable dichotomy of being hyper-visible and invisible (Beauboeuf-Lafontant, 2003; Fleetwood, 2001; Strings, 2019). Fat Black female bodies have borne the burden of exaggerated tropes and exploitation throughout history, stripping them of their femininity and humanity and resulting in a unique form of objectification (Strings, 2019). Inconsistent messages about BBWs, their bodies, and their value in society have endured for generations. They have been essential in constructing the controlling images of Black womanhood in the U.S. (Collins, 2000). The controlling images all evoked thoughts about the suitability of Black women …

Outcome Of Endodontic Microsurgery: Success And Survival Rates At Virginia Commonwealth University, Abdullah Alawadhi

Theses and Dissertations

Introduction: Endodontic microsurgery treatment is an option for teeth with apical periodontitis and may be indicated for teeth with previous endodontic treatment that have not healed, teeth with canal obstructions which would impede a non-surgical approach, and where a biopsy is needed. The purpose of this study is to evaluate healing after endodontic microsurgery in 2-dimensional PA radiographs and 3 dimensional CBCT imaging. Methods: Patient records were pooled from graduate resident cases completed at Virginia Commonwealth University in the Graduate Endodontic Clinic between the years 2010 to 2020. Cases were identified using the CDT codes and a key word search …

Racism Experiences And Mental Health: An Examination Of Direct, Vicarious, And Appropriated Racism Experiences On Mental Health Symptom Expression, Christina Barnett

Theses and Dissertations

The current study aimed to corroborate existing models of racism-related experiences by creating an explanatory model that operationalized direct, vicarious, and appropriated racism experiences. This study explored whether the factors of direct and vicarious racism experiences influenced mental health outcomes via appropriated racism experiences in a sample of Black women. This association was not present. However, results showed a positive association between vicarious and direct racism experiences, as well as predictive relations between direct and vicarious racism experiences and depression and trauma symptoms. Results, limitations, implications, and recommendations for future research are included.

Keywords: vicarious racism, appropriated racism, direct racism, …

Family History Of Substance Problems Among African Americans: Associations With Drug Use, Drug Use Disorder, And Prescription Drug Misuse, Rebecca Mahrs-Gould

Theses and Dissertations

Background: Understanding individual risk for substance use and substance use disorders is important in the efforts of reducing risk and prevention of these problems. A family history of alcohol and/or drug problems often increases the risk for these problems, however the majority of research in this area is conducted in samples that are predominantly White. African Americans face disparate outcomes from substance use and substance use disorders, and the risks for substance problems may not be the same as for Whites. A systematic review of the literature identified nine studies that examined a family history of either substance problems or …

Informing Telehealth Public Policy: Lessons Learned From Virginia Telehealth Usage Pre-And Post-March 2020, Shelly Smith

Theses and Dissertations

The enactment of Waiver 1135, in response to the COVID-19 pandemic, enabled healthcare systems to deliver care via telehealth. A descriptive analysis of the impact of the implementation of Waiver 1135 on increasing access to care in Virginia was conducted. Guided by Andersen’s Behavioral Model of Health Service Use (BMHSU) theory, this study used a longitudinal, monthly-level data from the Virginia’s All Payers Claim Database to examine telehealth utilization rates between January 2019 and December 2020. Observations in insurance coverage, healthcare clinicians role and specialty and geographic location were all examined. Results suggest that while Virginia’s overall volume of telehealth …

Effect Of Moderate Sedation Regimen (Diazepam, Meperidine, And Hydroxyzine) Dosages On Patient Behavior And Outcome Of Sedation In Pediatric Dentistry: A Retrospective Study, Taibah M A M J Albaker

Theses and Dissertations

Purpose: To determine if behavior at consult visit and sedation medication dosages are associated with the success of sedation visits and patient’s behavior using the diazepam, meperidine, and hydroxyzine (DMH) regimen.

Methods: A retrospective chart review was conducted of 324 VCU Pediatric Dentistry Department patients who underwent 404 moderate conscious sedation visits with DMH regimen from April 2017 to June 2022. Sedation visits were graded as “Successful” or “Unsuccessful” and “Good” or “Poor behavior.” The primary variables of interest included Frankl behavior at consult visit and the sedation medication dosages. Logistic regression models were used to determine if these factors …

Crosstalk Between Hippo And Rb Tumour Suppressor Pathways In Ovarian Cancer, Fatmata Sesay

Theses and Dissertations

The cell cycle is a highly regulated process that ensures the timely and accurate division of cells. Events of the normal cell cycle fall under two categories - positive and negative regulatory mechanisms. The first category, positive regulatory machinery, includes active protein complexes of cyclins in association with their partnering cyclin-dependent kinases (cyclin/CDK), which mediate series of phosphorylation events that relay a cell cycle progression from one stage to the next. The second category, the negative regulatory mechanisms, include the checkpoint controls consisting of the retinoblastoma (RB) family of proteins, some of which can form a transcriptional repressor complex DREAM. …

Do Coverage Expansion And Patient-Centeredness Care Delivery Improve Patient Health Outcomes And Care Quality?, Shiva Salehian

Theses and Dissertations

Although correlated, improvement of patient health outcomes and quality of care is a result of health care delivery, performance, and healthcare policies that intend to impact health outcomes (Porter, 2010; AHRQ, 2015). This dissertation focuses on a special model of care delivery (Patient-Centered Medical Homes (PCMH)) and two programs (Addiction and Recovery Treatment Services (ARTS) and Medicaid expansion) to examine the correlation and impact of these programs on cardiovascular-related preventive care, healthcare expenditures, and health behavior hospitalizations as patient outcomes.

Exosomal Mirnas As Biomarkers For Radiation Toxicity In Breast Cancer Patients, Mina V. Mcginn

Theses and Dissertations

Radiotherapy (RT) is a standard treatment for most breast cancer patients (BCPs), but is often accompanied by acute and late toxic effects in normal tissue. Exosomes are nano vesicles about 30-150nm in size that originate from the endosomal network and are found in most body fluids. Exosomes are a fundamental driver of intercellular communication by transferring proteins, lipids and microRNA (miRNA). Exosomal miRNA (Exo-miRNA) signatures may serve as non-invasive prediction biomarkers of post-radiation toxicities of BCPs. Eighty six BCPs treated in the Radiation Oncology Department were enrolled in an IRB approved study. BCPs were evaluated weekly during RT and at …

Secondary English Teachers’ Experiences Of Agency: Connections To Shifting Educational Contexts During Covid-19, Kristina Lee

Theses and Dissertations

The COVID-19 pandemic caused schools around the world to enter uncharted territory. Due to the unprecedented nature of the educational crisis, it was important to examine how teacher agency may have been affected. Teacher agency can have important implications for school climate, policy, and the experience of stakeholders. The main focus of this study was to cultivate an understanding of secondary English teachers’ perceptions of agency as they navigated teaching throughout the COVID-19 pandemic. An ecological framework was used to examine teachers’ experiences of agency in the context of COVID-19. The study utilized a basic qualitative design with in-depth interviews …

“There Was Some Sort Of Missing Middle”: Lived Experiences Of Jewish Youth With Intellectual And Developmental Disabilities, Aliza Lambert

Theses and Dissertations

Though religion and spirituality contribute to overall well-being (Koenig, 2012; Koenig & Cohen, 2002), social support (Biggs & Carter, 2016; Koenig & Cohen, 2002; Taub & Werner, 2016), quality of life (QOL; Myers & Sweeney, 2000), coping strategies (Krok, 2008), and lower rates of depression and anxiety (Brown et al., 2013; Young et al., 2000), religion and spirituality are seldom included in curriculum in counselor education and supervision doctoral programs (Adams et al., 2015; Henriksen et al., 2015). In the present study, the researcher uses a multiple-case study design to describe the lived experiences of Jewish youth with intellectual and …

Low Insertion-Loss Nanophotonic Modulators Through Epsilon-Near-Zero Material-Based Plasmon-Assisted Approach For Integrated Photonics, Mohammad Ariful Hoque Sojib

Theses and Dissertations

Electro-optic/absorption Modulators (EOM/EAMs) encode high-frequency electrical signals into optical signals. With the requirement of large packing density, device miniaturization is possible by confining light in a sub-wavelength dimension by utilizing the plasmonic phenomenon. In plasmon, energy gets transferred from light to the form of oscillation of free electrons on a surface of a metal at an interface between the metal and a dielectric. Plasmonic provides increased light-matter interaction (LMI) and thus making the light more sensitive to local refractive index change. Plasmonic-based integrated nanophotonic modulators, despite their promising features, have one key limiting factor of large Insertion Loss (IL) which …

Perceived Discrimination And Mental Health Outcomes In College Students: The Mediating Role Of Preventive Health Behaviors And Social Support, Sarah C M Morton

Theses and Dissertations

Perceived discrimination has been linked to adverse mental health outcomes, increased risk-taking behaviors, and poor engagement in health promoting behaviors. College students may be especially susceptible to negative mental health outcomes associated with discrimination due to the unique stressors faced by young adults (e.g., prolonged transition to adulthood, onset of mental health disorders, changes in social support). The current study examined the mediating and moderating roles of health behaviors and social support on the association between perceived discrimination and mental health outcomes (e.g., anxiety, depression, suicidality) in college students. A total of 709 college students (42.8% White; 72.2% female; 30.2% …

Special Education Teacher Retention: The Importance Of Teacher Working Conditions, Erica Ross

Theses and Dissertations

Teacher retention, or why teachers stay, is an important area of study considering the impact teacher attrition and turnover can have on student outcomes (Hirsch & Emerick, 2006). Teacher attrition and turnover are even more concerning for those that are special education teachers (SETs), and it is noted as a priority to address in the state of Virginia (Solenson et al., 2018). Through an adapted organizational theory lens, this study addresses the following aims: 1) Determine if there are differences in perceptions of teacher working conditions (TWCs) between special education teachers (SETs) and teachers of other content areas and 2) …

A Technology-Based, Mixed Methods Approach To Examining The Psychosocial Determinants Of Maternal Health Disparities, Hannah M. Ming

Theses and Dissertations

Background: Exposure to racism and discrimination in the U.S. increases Black women’s risk for experiencing maternal health disparities. Additionally, racism and discrimination affect maternal psychosocial well-being, creating evidence for a biopsychosocial relationship between racism and maternal health outcomes. However, current research does not define the psychosocial Black maternal self well. Given the dynamic relationship between racism, psychosocial well-being, and Black maternal health outcomes, research must comprehensively examine the Black maternal self. The operationalization of a comprehensive construct for Black maternal psychosocial well-being can improve understanding of the relationship between racism, psychosocial well-being, and Black maternal health outcomes.

Purpose: …

Caregiver's Nicu Experiences And Its Impact On Services, Crystal L. Hence

Theses and Dissertations

Having a child spend time in the Neonatal Intensive Care Unit is documented as a stressful experience for caregivers. Previous literature documents caregivers’ difficulties navigating the Neonatal Intensive Care Unit, showing that this problem has persisted for close to 20 years. Early Intervention can provide benefits to infants born prematurely, who may be more at risk for developmental delays and since the goal of Early Intervention is to provide services that help families in their daily lives, it has benefits for caregivers as well. Yet, Early Intervention enrollment remains low across the state of Virginia. This study using a qualitative …

Tummy Time In Infancy: Real-World Assessments And Associations With Developmental Outcomes In Early Childhood, Ketaki Inamdar

Theses and Dissertations

Tummy time or awake, supervised, prone play is an important developmental play position in infancy. Engaging in more than 15 minutes of tummy time per day is associated with a lower risk of plagiocephaly, lower body mass index, and achievement of higher motor scores in full-term and at-risk preterm infants. However, there are significant gaps in the measurement of tummy time in current literature. Conventionally used subjective parent reports have not been validated against gold standard direct observation, and the feasibility and real-world validity of objective solutions such as wearable sensors has not been examined in full-term and at-risk preterm …

Authenticity, Care, And Relationships: Ethical Decision-Making In Criminal Justice Education, Robert B. Lehmann

Theses and Dissertations

Many events in recent history have demonstrated the need for addressing the training of law enforcement and other public servants commonly referred to as criminal justice professionals in the United States. Reckoning with the imperfect history of the criminal justice system, specifically the history of problematic relations with marginalized people, and developing a system that is better equipped to meet the needs of an equitable and just society is at the forefront of many discussions of criminal justice reform. Improving ethical decision-making training in criminal justice education is one avenue to addressing these needs for current and future professionals. Conceptually, …

Mending Art Classrooms: An Exploration Of The Benefits Of Collaborative Artmaking For Underinvested Black Youth In Richmond, Virginia, Jazmine M. Beatty

Theses and Dissertations

This arts-informed research study explored the experiences of local community artists and educators working to radically transform and heal the experiences of underinvested Black students in Richmond through collaborative arts engagement. Through a series of seven one-on-one interviews with Black teaching artists in the Richmond community, I was able to uncover how collaboration has and can continue to improve the well-being and livelihoods of Black students in Richmond. Also, by tapping into the local Mending Walls mural project, I was able to make a tangible connection between the Richmond community, art, and collaboration. An analysis of the interviews led to …

Sleepiness: Clinical Correlates, Association With Performance, And Effects Of Performance Feedback, Spencer Nielson

Theses and Dissertations

Background: Daytime sleepiness is a common and debilitating phenomenon. Sleepiness is associated with increased symptoms of insomnia, depression, anxiety, and fatigue. Daytime sleepiness is commonly associated with cognitive performance, including performance on the Psychomotor Vigilance Test (PVT). The PVT includes performance feedback, and that feedback may influence an individual’s report of their sleepiness. Whether the feedback on the PVT influences an individual's self-reported sleepiness is unknown. This study sought to investigate how sleepiness was associated with clinical symptoms and performance, whether there are sex differences in sleepiness, and whether manipulating feedback on the PVT influenced an individual’s self-reported sleepiness. …

Learning Robot Motion From Creative Human Demonstration, Charles C. Dietzel

Theses and Dissertations

This thesis presents a learning from demonstration framework that enables a robot to learn and perform creative motions from human demonstrations in real-time. In order to satisfy all of the functional requirements for the framework, the developed technique is comprised of two modular components, which integrate together to provide the desired functionality. The first component, called Dancing from Demonstration (DfD), is a kinesthetic learning from demonstration technique. This technique is capable of playing back newly learned motions in real-time, as well as combining multiple learned motions together in a configurable way, either to reduce trajectory error or to generate entirely …

Effects Of A Video Based Intervention On Job Interview Skills Of Youth With Autism, Kelsey T. Dunn

Theses and Dissertations

In this dissertation, I conducted a multiple-probe-across-participants design to examine the impact of a video-based intervention on interview skills of youth with autism. First, I conducted a systematic literature review of interview interventions. Results were used to guide the development of this study’s measure and procedures. Finding that previous literature relied on rubric measures to rate interview skill behaviors, I developed and piloted a primary measure for examining direct speech production. Using transcripts and video analysis, this study captures the construct of interview skills using both quantity (frequency of relevant/irrelevant c-units) and quality (interview skills rubric score). The intervention consisted …

Understanding Structure/Process-Property Relationships To Optimize Development Lifecycle In Yttria-Stabilized Zirconia Aerogels For Thermal Management, Rebecca C. Walker

Theses and Dissertations

Aerogels are mesoporous materials with unique properties, including high specific surface area, high porosity, low thermal conductivity, and low density, increasing these materials’ effectiveness in applications such as catalyst supports, sorption media, and electrodes in solid oxide fuel cells. Zirconia (ZrO₂) aerogels have special interest for high-temperature applications due to the high melting point of ZrO₂ (2715°C) and stability between 600°C and 1000°C, where other aerogel systems often begin to sinter and densify. These properties and unique pore structure make zirconia aerogels advantageous as thermal management systems, especially in aeronautics and aerospace applications. However, to be effective …

Disparities Between Native Americans And Whites In Trajectories Of Functional Independence And Life Satisfaction Over The 5 Years After Traumatic Brain Injury, Jack Watson

Theses and Dissertations

A traumatic brain injury (TBI) can have a host of negative consequences including impairments to motor and cognitive function and can result in a decrease in quality of life (i.e., life satisfaction). TBI is one of the leading causes of death and disability worldwide and disproportionately affects Native Americans, who have the highest rates of TBI among all races in the U.S. and elevated likelihood for fatality and severe complications. The current study used a subsample of the national TBI Model Systems Database of 80 demographically and injury severity matched Native American and White individuals (total n = 160) to …