Digital Commons Network^™

Numerical Analysis Of A Novel Elastohydrodynamic Seal For Supercritical Co2 Power Cycles With Experimental Verification, Ali Akbor Topu

College of Graduate Studies: Theses & Dissertations

Supercritical carbon dioxide (sCO₂) power cycles outperform conventional thermodynamic cycles regarding the efficiency and equipment footprint because of its unique property of maintaining the density of liquid in the gaseous phase at supercritical state (304.13 K and 7.37 MPa). It has robust use in concentrated solar power, fossil fuel power plants, geothermal electricity, nuclear power, and ship propulsion. To fully utilize sCO2 power cycles, technology readiness must be demonstrated at 10-60 MWe scale, with a working temperature and pressure of 350-700°C, and 10-35 MPa respectively. A crucial obstacle to the full realization of this technology is the absence …

Masculine Vs. Feminine Women: Verdict, Blame, And Punishment Outcomes In The Legal System, Alaina Helmerichs

College of Graduate Studies: Theses & Dissertations

It is commonly recognized that sentencing disparities exist between men and women who are accused of the same crime—with men often receiving harsher judgements than women. However, research explaining why this disparity exists is incomplete. Research suggests that higher levels of facial masculinity in men is tied to higher levels of criminality (Estrada-Reynolds et al., 2017); however, little research looks at this pattern amongst female defendants. The current study investigated whether the gendered appearance (masculine vs. feminine) of female defendants in different types of cases (child negligence vs. medical malpractice) affects mock jurors’ judgments about verdict, punishment, and internal blame …

Dungeons And Dragons™ (D&D) As A Brief Intervention For College Students, Alexander W. Peralta

College of Graduate Studies: Theses & Dissertations

This quasi-experimental study investigated the effect of a table-top roleplaying game (ttrpg), specifically Dungeons and Dragons™ (D&D), on increasing feelings of social connection, decreasing perceived stress, increasing self-esteem and improving adjustment to college among first semester, first year students. participants signed up to either the D&D group or the comparison group. D&D participants (n = 18) attended five one-hour weekly D&D sessions, meanwhile the comparison group (n = 10) went through their first semester of college with no intervention, but completed the study measures at the same points in time as the D&D participants. All participants completed measures of social …

Mathematical Modeling Of Coupled Heat And Mass Transfer In Metal-Hydride Hydrogen Storage Systems, Muhammad Hasnain

College of Graduate Studies: Theses & Dissertations

As a promising clean energy carrier hydrogen has recently gained significant interest, but its efficient and safe storage is a major challenge. Compared to the gaseous state and liquid state, metal hydrides (MH) offer a potentially more effective storage approach for hydrogen. However, the main challenge in this approach is the low thermal conductivity of the MH bed that leads to low heat transfer and ultimately to higher charging and discharging times. The purpose of this work is to develop an in-house comprehensive heat and mass transfer model for hydrogen sorption in MH reactors to simulate the dynamic behavior of …

Natural Convection Heat Transfer Characteristics Of Sierpinski Carpet Fractal Fins In Horizontal And Vertical Orientations, Ayomide Ayoola

College of Graduate Studies: Theses & Dissertations

This study investigates the thermal performance of fins with perforations inspired by the Sierpinski carpet fractal pattern under natural convection conditions in both vertical and horizontal orientations. The objective is to analyze the effects of fractal iteration levels on three primary performance metrics: efficiency, effectiveness, and effectiveness per unit mass. Experimental evaluations were conducted for fractal fins from iterations 0 through 4, utilizing aluminum material, with each fin heated to controlled conditions. The results reveal that efficiency generally decreases with higher fractal iterations, reflecting increased thermal resistance associated with greater porosity and complex geometry. However, effectiveness per unit mass improves …

So Much Courage: Hemingway, War, And Rape, Tracie Nicolai

College of Graduate Studies: Theses & Dissertations

Weaving together Ernest Hemingway’s biography and literature with her own life, Tracie Nicolai analyzes the impact of Hemingway’s life and literature in the classroom and outside of it. War trauma is analyzed in relation to rape and its lasting effects, paralleling the impacts and the traumas that shape our philosophies and our lives. Nicolai explores how Hemingway wrote of war and his own injuries, and she discusses the distance evident between his own life experiences and his subsequent fiction writings. In separate vignettes in each chapter, Nicolai writes of her experience as a rape survivor and the lasting impact on …

Development Of A Measure Assessing Adolescent Aggression: The Aggressive Behavior Risk Assessment- Adolescent- Parent Report (Abra-A-Pr), Katherine Fallon

College of Graduate Studies: Theses & Dissertations

Although parent-report scales for general behavioral difficulties and aggression (e.g., verbal and physical aggression) exist, there are currently no measures assessing sexual behaviors in this context. Commonly, parent-report measures provide a few items relevant to behavioral aggression, and items encompassing sexually aggressive behaviors are frequently vague and non-specific in the actions being committed by the adolescent. The primary purpose of this project was to develop a comprehensive and multifaceted parent-report measure for aggressive behavior in adolescents. Three separate studies were conducted to evaluate the psychometric properties of the measure. Exploratory (EFA) and confirmatory factor analysis (CFA) were used to investigate …

The Effect Of Local Anesthesia When Used In Dental Restorative Cases Under General Anesthesia On Control Of Postoperative Comfort, Elizabeth S. Kleefisch Dds

Theses and Dissertations

Purpose:

To determine the effect of local anesthesia on postoperative comfort in patients undergoing dental care under general anesthesia.

Methods:

This study was modeled as a double-blinded randomized control trial. Patients included healthy children under the age of 6 years scheduled for restorative dental treatment under general anesthesia (GA). Patient behavior was evaluated preoperatively and postoperatively using the Faces, Legs, Activity, Cry and Consolability (FLACC) or other pain score and postoperatively using the Parent’s Postoperative Pain Measure (PPPM). Intraoperatively, participants followed a standardized general anesthesia protocol and were given either local anesthetic (LA) infiltration using 2% Lidocaine 1:100,000 Epinephrine by …

Living The American Dream? College Experiences Of Undocumented Students In An Era Of Rising Xenophobia And Political Turmoil, Sandra Y. Ting Ph.D.

Theses and Dissertations

This research study sought to deepen the understanding of the journeys of undocumented and DACAmented college students in an era of escalated xenophobia and political unrest. Three noteworthy themes emerged from the sentiments expressed by participants. The experiences they described included: 1) the turmoil of undocumented status eliciting unique and empowering demonstrations of resourcefulness, creativity, and self-advocacy, 2) motivation and stress from their respective citizenship statuses existing as two mutually dependent facets of a unified whole, 3) a community of support from other undocumented and/or DACAmented peers as a necessity for wellbeing. These critical outcomes culminate in the conditioning to …

Factors Important To Underrepresented Minority Applicants In Ranking Orthodontic Programs, Alyssa Patterson

Theses and Dissertations

Purpose: To determine if there was a difference in desirability of various factors used by applicants ranking orthodontic programs depending on their racial or ethnic background.

Method: A survey was distributed to orthodontic residents to assess overall preferences, and differences in desirability of various factors between underrepresented minority (URM) and non-URM applicants.

Results: For applicants overall, “clear aligner therapy training”, “good quality of clinical faculty” and “high number of cases started” had the highest mean desirability. “Racial and ethnic diversity among current and former residents”, “racial and ethnic diversity among faculty” and “participation in care of Medicaid patients” were significantly …

Shinners, Alexis E. Mabry

Theses and Dissertations

Shinners is a project that aims to examine the position of women in subcultures and capture conversations of women in subcultural sports. Within feminism, sociological constructs, campy horror, and personal experience I am manifesting the physical and mental obstacles faced in the subcultural sport of Bicycle Motocross (BMX) through photography, painting, collage, video, and sculpture. I interpret images posted to social media of injuries obtained while riding BMX as forms of empowerment, bodily gore as extreme evidence of participation, performative violence, valorizing the understanding of both the physical and psychological pain of failure, and the use of failure as a …

Points Of Contact, Giancarlo Venturini

Theses and Dissertations

The work in Points of Contact arises from engaging love as it relates to distance, desire, and longing. This paper will analyze my painting practice and its evolution from the explicit to implicit. Specifically I am going to talk about my utilization of landscape painting to consider another way of expressing sexuality and queerness. I will explain how objects and landscapes are conduits for feelings that can intrinsically hold allegorical representations. This show is about searching through vast spaces to find points of connection in the natural world. I will talk about portals and the varied degrees of accessible windows …

Using Natural Language Processing To Understand The Lived Experiences Of People Identifying With Adhd: What Themes Emerge In Social Media Posts?, Gabby C. Scalzo

Theses and Dissertations

Compared to the amount of research conducted on how to identify and understand children with Attention-Deficit Hyperactivity Disorder (ADHD), there has been relatively little work done to understand the lived experiences of adults with ADHD. Increased understanding of how adults with ADHD conceptualize themselves in the context of their diagnosis would help clinical experts tailor research and treatments to better serve these communities. However, there are several barriers towards conducting high-quality qualitative research, including time- and labor-intensity. This study, informed by qualitative research traditions, used innovative data sources (i.e., social media) and analytic techniques (i.e., machine learning) to reduce these …

Preexisting Conditionings: Painting, Gaming And Narrative Play, Pia Bakala

Theses and Dissertations

My work incorporates play, fantasy, and self-actualization through painting, sculpture, and video. In this essay, I will explore the ways in which my studio practice intersects with topics across fields of visual arts and in conjunction their theoretical frameworks. I will discuss the culminating body of work, tentatively titled Preexisting Conditionings, that my academic experience at VCU has fostered and trace its development across specific precursive works, as well as the cultural and intellectual touchstones influencing its creative impetus. In Preexisting Conditionings, I work primarily use oil painting, creating mostly representational figurative tableaus that correspond to narratives and characters I’m …

Exploring The Experiences Of Refugee Youth In Public Schools: An Ethical Phenomenological Inquiry, Hilary T. Stim

Theses and Dissertations

The study outlined in this dissertation focuses on the intersection between refugee youth between the ages of 13-18 and the United States public school, specifically the manner in which refugee youth experience institutionalized education. It utilizes ethical phenomenology as a means to amplify the voices of refugee students and to centralize the students' experiences, thoughts, and ideas related to education The study was framed by one research question that is addressed to the participants: “What is it like being a student in a public school?” Seven students took part in the study. Collaborative dialogues took place with the participants across …

The Effects Of Various Nanoplastics On The Inflammatory Response In Primary Alveolar Epithelial Cells, Eunice J. Pak

Theses and Dissertations

As plastic pollution begins to multiply in the environment and the workplace, gradual degradation of these plastics creates an unseen threat to biological health: nanoplastics. These nanoplastics are common in day-to-day life, and have been found in various internal organs of the human body. The biological and health effects of these nanoplastics are still widely unknown, and only recently has research focused on the impacts of these particles on human health at the cellular level.

In this thesis, poly(methyl methacrylate) and three forms of polystyrene (carboxyl-modified, amine-modified, and neutral surface charge) have been tested on submerged primary C57BL/6 mouse alveolar …

In Shame I Will Find Paradise, Taehee Whang

Theses and Dissertations

As a Korean American non-binary digital artist and designer, my recent explorations have focused on using voice as a medium to articulate nuanced feelings of displacement and the intricate relationships between language, identity, and expression. This journey expands beyond my personal experiences with gender dysphoria, delving into the lives of non-binary and transgender individuals undergoing gender-affirming voice therapy. Through my thesis research, I have developed interactive multimedia installations inspired by dialogues with individuals such as Umico Niwa, who traveled to Korea for voice feminization surgery, and Jeong Yoon Lee from Hyperlink Press, a four-year participant in Hormone Replacement Therapy (HRT). …

Sense Make Before Book, Bradley Sinanan

Theses and Dissertations

“Sense Make Before Book” is an Indo-Caribbean turn of phrase which refers to common sense being more important than book smarts. My sister sent me a post the other day on Instagram of an Trinidadian woman using this phrase, saying it was one of Indo-Caribbean origin. I was interested and asked my mom about it. My mom says that when she was younger my grandpa said it often around their house in Princes Town, Trinidad and Tobago. This adage feels charged thinking about the history of indenture and its effects on the Indo-Caribbean diaspora.

The written word of archival history …

Beyond The Veil: Hijabi Superheroes And The Power Of Representation, Moom Thahinah Ms

Theses and Dissertations

As a Hijabi woman, I am often misrepresented by stereotypical narratives in Western media that obscure my individuality and agency. My thesis addresses the misrepresentation of Hijabi women, challenges audience perceptions, and empowers Hijabi women to confront these narratives.

Informed by design and media discourse, I developed a narrative and a Hijabi superhero character appropriating tropes of Western comic books. The resulting research combines two outcomes: a print-based narrative and a transformative garment. Print media is used to address the lack of Hijabi representation in Western comics while showcasing the character’s ability to combat discrimination. Derived from the comic format, …

A Walk In The Woods, Caitlin Mclean

Theses and Dissertations

A connection with nature fosters increased appreciation, admiration, and responsibility toward the natural environment, thus encouraging the mindful use of its resources and preservation of both species and their habitats. Defined by Mayer and Frantz (2004) as an “experiential sense of oneness with the natural world”, this connection is more important now than ever in this highly digital era. Studies indicate that limited exposure to nature can negatively impact the activation of neural pathways associated with pro-environmental attitudes and behaviors (Chawla, 2020), while further research shows that engagement with the outdoors during childhood as a significant life experience (Chawla, 1998), …

Politics Of Being A Lover: In Art, (Space) And Kink, Rabeeha Adnan

Theses and Dissertations

Politics of being a lover: in art, (space) and kink explores my relationship with my practice through observations and stories that draw parallels with romance and kink. Narrated as love affairs turned into complex commitment, it shuffles through logics of structural power, control, and communication in the context of praxis and art institutions.

"I Call Them Supermoms": Therapists' Reflections On The Impact Of Youth Sexual Offending On Latina Mothers, Mauricio P. Yabar

Theses and Dissertations

Families of youth who have sexually offended often suffer significant collateral consequences following the discovery of the sexual offense. Samples in research with these families disproportionately consist of mothers and other female parental figures. This is rarely acknowledged in the literature, and the experiences of these mothers have not been explicitly examined. In addition, research on the experiences of these families has largely ignored factors related to race and ethnicity. This is a significant oversight considering the prevalence of systemic racism and discrimination in the United States, particularly in the systems with which these families must interact (e.g., juvenile justice …

Revealing The Elusive Mechanism Of Action Of The Lipid Chaperone Fatty Acid Binding Protein 4, Abdul J. Castillo Ibanez

Theses and Dissertations

Fatty acid binding proteins (FABPs) are pivotal in orchestrating lipid trafficking within cells. This dissertation aims to reveal the mechanism of action of adipocyte FABP (FABP4) by meticulously detailing steps for producing uniformly isotopically labeled protein, understanding dynamics and structural changes in aqueous conditions, analyzing protein-membrane interaction with membrane mimicking models, and revealing its membrane-bound state through novel NMR structural elucidation. Chapter 1 provides an overview of FABP4's indispensable role in lipid trafficking, emphasizing its significance in maintaining cellular homeostasis and metabolic regulation. Chapter 2 delves into the optimization of FABP4 protein expression and proposes a high yield recovery and …

Associations Among Acculturative Stress, Body Ideal Internalization, Body Dissatisfaction And Disordered Eating Behaviors Among Cisgender Heterosexual And Lgbt People Of Color, Taryn Henning

Theses and Dissertations

Research supports the relation between acculturative stress and disordered eating behaviors (DEBs) across racially and ethnically diverse groups of men and women. However, there is minimal research examining factors that further explain the relation between acculturative stress and DEBs. Also, this relation has not been evaluated in racially and ethnically diverse LGBT individuals. The current study aimed to address these gaps by examining the role of thin-, muscular-, and hourglass-ideal internalization and body dissatisfaction as mediators of the relation between acculturative stress and disordered eating behaviors among cisgender heterosexual Black, Latine, Asian American, Multiracial men and women and LGBT men …

Reflection: Cultivating Creativity And Healing Through Art Therapy, Caroline Ciccone

Theses and Dissertations

I was first introduced to the healing powers of art after working in an orphanage in Jamaica with children who had a wide range of disabilities. Some children were mute or unable to communicate, but art was a form of communication that brought us all together. Within the City of Richmond public school system, 31.7% of students are economically challenged and 13.1% of students are disabled (Education, 2022). Giving more resources in the arts and mental health support to students outside of their school environments is the goal. Art therapy helps reduce the dropout rate and improve mental health (10 …

Particl Plant Medicine, Tommye Dean

Theses and Dissertations

In an era marked by a growing recognition of mental health as a critical component of overall well-being, unconventional approaches to therapeutic interventions have gained prominence. One such intervention coincides with the importance of setting the intersection of psychedelic therapy and interior design, creating a synergistic environment for emotional healing and self-discovery. This thesis ventures to delve into the uncharted territory where the realms of altered states of consciousness and thoughtful spatial design converge, seeking to discover the profound impact this collaboration may have on the therapeutic and design landscape.

Side Effects, Shannon R. Kurzyniec

Theses and Dissertations

Through the exploration of the personal and social impacts of prescription medications on the human condition, I have discovered that the side effects of prescription medications on myself and others are much greater than I had ever anticipated. The deeper I dig into my subconscious, the further back I find that the impact was created. Most of us are taught at a young age to take medicine when we don’t feel well. Stomach ache, headache, sore throat, fever, even the imaginary boo boo is given a pill to cure. As we age we begin to reach for pills due to …

Notes Toward A Personal Afrofuturism, Jalen T. Adams

Theses and Dissertations

This paper is penned by a young adult who is generally confused about a lot of things regarding life, but has one singular focus that is perhaps larger than life—trying to find the bridge between a future already lived, and a past yet to happen. These are his findings so far.

Tchu Tcha Tcha: The Transformative Role Of Funk, Adriane De Souza

Theses and Dissertations

Cultural disconnection and homesickness are part of expatriate life. My research investigates the transformative power of Brazilian funk, which, for me, evokes restorative memories of home and life in Rio de Janeiro.

Originating in North America, funk made an exciting leap and found a new home in Brazil, particularly in Rio de Janeiro. Over time, it has become firmly established and thoroughly Brazilianized, infused with local instruments and influences, leading to the emergence of a new genre of music known as Brazilian funk.

Transplanted again, to Qatar, this work celebrates the migration of funk through a combination of still images, …

Analyzing The Role Of Slc25a32 In Hepatocellular Carcinoma, Mimansha Shah

Theses and Dissertations

Hepatocellular carcinoma (HCC) is the most common primary liver cancer and a leading cause of cancer-related deaths worldwide. Despite advances in understanding its molecular pathogenesis, treatment options for HCC remain limited, highlighting the need for identifying novel therapeutic targets. This study investigates the role of SLC25A32, a mitochondrial transporter gene located on chromosome 8q22.3, in HCC progression. SLC25A32 is involved in the transport of tetrahydrofolate (THF) and flavin adenine dinucleotide (FAD) into mitochondria, playing a crucial role in one-carbon metabolism and redox balance. Using CRISPR/Cas9 technology, we generated potential SLC25A32 knockout clones in the HCC cell line Huh-7. Quantitative PCR …