Digital Commons Network^™

A Numerical Investigation Of A Spark Ignition Opposed Piston Linear Engine Fueled By Hydrogen, Mustapha Alao Animashaun

Graduate Theses, Dissertations, and Problem Reports (ETD)

The traditional Slider-Crank Engine, also known as the Internal Combustion Engine (ICE), has been criticized for its complex structure, friction loss, low efficiency and high maintenance cost. In contrast, the Free-Piston Linear Engine (FPLE) reduces this friction due to its simpler design. With rising concerns about air quality and stricter regulations, there's a renewed interest in hydrogen as a carbon-free fuel for ICEs.

The Opposed Piston Linear Generator (OPLG) system is an integrated arrangement of parts operating harmoniously to generate power efficiently. By leveraging synchronized pistons, accurate fuel distribution, and seamless thermodynamic cycles, it transforms kinetic energy into electrical energy. …

Retention And Persistence Of Low-Income, First-Generation Rural College Students From West Virginia, Rachel D. Nieman

Graduate Theses, Dissertations, and Problem Reports (ETD)

A considerable body of research demonstrates that first-generation college students face greater obstacles to college retention, persistence and completion compared to their non-first-generation counterparts. However, the extant literature rarely explores rurality as a salient factor to understand these challenges. Even less visible in the literature are the experiences and voices of West Virginians. West Virginia is a predominantly rural state and ranks 49^th in the nation in terms of educational attainment, with only 19.6% of residents over the age of 25 having earned at least a bachelor’s degree. While rural areas may experience multifaceted struggles, the educational attainment of …

Exploring The Biological Basis Of Residual Feed Intake In Beef Cattle Using Multi-Omics Analysis., Godstime Ayobami Taiwo

Graduate Theses, Dissertations, and Problem Reports (ETD)

Efficient feed utilization is critical for both economic sustainability and environmental responsibility in modern livestock production. While there has been extensive research, the multifaceted nature of feed efficiency remains complex, with many biological factors still unexplored. This dissertation examines the physiological foundations of feed efficiency by elucidating some of the complex biological mechanisms associated with residual feed intake (RFI) phenotype in beef cattle, using a range of Omics approaches. We hypothesized that metabolites related to amino acids, carbohydrates, and fatty acids could act as potential biomarkers for RFI. Through a chemical group-based metabolomics method, we identified enriched pathways in feed-efficient …

Right Treatment Wrong Time: Immunotherapy Administration Post-Radiotherapy Decreases Tumor Burden In A Preclinical Model Of Brain Metastasis, Kathryn Elizabeth Blethen

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation (a) provided an in-depth literature review of methods to modulate the blood-brain and blood-tumor barriers to increase drug delivery and efficacy in brain metastases, (b) evaluated the effects of whole-brain radiation therapy on the blood-brain barrier in immunocompetent and immunocompromised mouse models and proposed a mechanism by which the immune response to radiation disrupts the blood-brain barrier, and (c) developed a syngeneic lung cancer brain metastasis model to determine the impact of coordinated immunotherapy administration with radiotherapy. The blood-brain barrier is an impediment to drug delivery to the brain. The inherent leakiness of the blood-tumor barrier does not …

Impacts Of Error Rate And Therapist Appearance On The Accuracy Of Fidelity Data Collection, Marisela A. Aguilar

Graduate Theses, Dissertations, and Problem Reports (ETD)

Procedural fidelity is the extent to which a procedure is implemented as designed. Analyzing procedural-fidelity data can improve treatment outcomes. Fidelity data are generally collected by a supervisor or trained data collector using a checklist that operationalizes each component of the procedure and accounts for errors in implementation of the components. However, little is known about variables that may affect the accuracy of supervisor-collected data generally, and even less is known about variables that may affect the accuracy of procedural-fidelity data. Therefore, the current studies explored the extent to which Board Certified Behavior Analysts (BCBAs) accurately detected programmed fidelity errors …

Fast Raising: Digital Fundraising As Interaction Rituals, Matthew P. Hartwell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Twice a year, GamesDoneQuick hosts events that showcase the Speed Running Community, a sub-set of the Video Game Community. Since its inception in 2014 through 2021 GDQ has raised $25.7 million that has been distributed to the Prevent Cancer Foundation and Médecins Sans Frontiers (Doctors without Borders). This collection of studies analyzes the Awesome Games Done Quick 2020 event utilizing the Interaction Ritual Theory framework of Randall Collins to understand how ritualistic social action of this community has been leveraged by event organizers to promote successful crowd funding efforts that benefits organizations outside of the community. Further it expands on …

Applications Of Digital Filters In Radio Astronomy, Joseph William Kania

Graduate Theses, Dissertations, and Problem Reports (ETD)

The radio sky spans tens of orders of magnitude in length, density, and time.
In this thesis, using novel filtering techniques and two different telescopes,
we investigate two tracers of cosmic structure: Baryon Acoustic Oscillations
(BAOs) and Fast Radio Bursts (FRBs). BAOs formed as the universe cooled
after the Big Bang. BAOs provide a fiducial length scale of the universe
throughout cosmic time and thus can be used to understand how the universe
is evolving. FRBs are very bright, short timescale, bursts of as-yet unknown
origin which occur uniformly on the sky at a rate of a few thousand per …

“I’Ll Tell You No Lies”: An Exploration Of Trauma, Memory, And Violence Against Women In North Carolina Murder Ballads, Madison Ava Helman

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation explores trauma, memory and violence against women in Western North Carolina murder ballads “Tom Dooley,” “Poor Omie Wise,” “Poor Ellen Smith,” “The Ballad of the Lawson Family,” and “Frankie Silver.” I posit that these ballads were influenced by prescriptive societal conceptions of femininity, which in turn influenced societal ideations of violence against women. Using folklore performance theory, I analyze the text and context of these ballads and their subsequent histories, eventually arriving at a template for polyvocality that incorporates multiple ballad variants and encourages diverse performances.

Abundance-Habitat Relationships And Aquatic-Terrestrial Habitat Selection Patterns For Wood Turtles (Glyptemys Insculpta) In The Upper Midwest, Jena Marie Staggs

Graduate Theses, Dissertations, and Problem Reports (ETD)

Due to range-wide population declines, wood turtles (Glyptemys insculpta) are under review for federal listing under the United States Endangered Species Act. Understanding how habitat associations and environmental conditions influence population dynamics and spatiotemporal activity patterns is fundamental for designing effective management strategies. Previous work on wood turtle abundance-habitat relationships focused on broad-scale habitat relationships in northeastern North America. However, regional differences in climate, habitat conditions, and land use patterns limit their applicability to much of the wood turtle’s Upper Midwest distribution. Much of our understanding of wood turtle activity patterns is based on radiotelemetry studies, which are biased towards …

Conditioned Reinforcement By Stimuli Correlated And Uncorrelated With A Schedule Of Food Reinforcement, Lillian L. Skiba-Thayer

Graduate Theses, Dissertations, and Problem Reports (ETD)

A conditioned reinforcer derives its function from a relation to an established reinforcer. Respondent views suggest that a stimulus acquires reinforcing properties because it is positively correlated with an established reinforcer. Alternatively, the information hypothesis suggests that a stimulus acquires reinforcing properties because it reduces uncertainty about the likelihood of an established reinforcer. Observing response procedures have been used to evaluate the function of stimuli positively correlated (S+), negatively correlated (S-), and uncorrelated (S1, S2) with established reinforcers such as food (with animals) or money (with humans). Verbal instructions have been shown to alter the extent to which correlated and …

Energy Digital Twins In Smart Manufacturing Systems, Anna Billey

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this thesis, an Energy Digital Twin for smart manufacturing systems was developed and evaluated. In particular, the study focused on bidirectional parameter communication between the physical and the virtual part with the aim of optimizing the energy used in the manufacturing process. Rising costs and the environmental impacts related to energy consumption have grown in importance worldwide. There are elevated concerns in sectors like manufacturing, leading to an urgent quest to reduce energy consumption. A recent advancement in Industry 4.0 technology, the Digital Twin, represents a promising smart technology and tool that researchers are investigating to help reduce energy …

Lithium-Ion Battery Safety Analysis With Physical Sub-Models, Samuel Abimbola Ogunfuye

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ever-increasing explosions occurring globally at a rapid rate and in diverse situations have re-established the fact that novel, faster, and more accurate approaches must be developed to analyze and possibly curb these explosions and avert their future occurrences. Experimental endeavors and computational fluid dynamics (CFD) simulations as compared to engineering models generally require enormous time, and resources, as well as a high-level of expertise and technicalities. This might, however, delay prompt analysis and the ability to draw conclusions, thereby causing setbacks in recommending safety measures for different situations and conditions. Therefore, robust models which are accurate and fast to give …

The Everyday Work-Lives Of Public Librarians In A Diverse Us City, Mariam Jalalifard

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation is situated within the context of the author's personal experience as a librarian of color and educator, exploring the dissonance between the perceived value of their role and their own understanding of its worth. The study aims to bring to light the processes that shape the experiences of female librarians, particularly those who are women of color. The research is informed by Institutional Ethnography (IE) and Narrative Analysis, which focus on the everyday lived experiences of people as the research problematic, and progress through layers to uncover how external power structures influence daily life. Five active female and …

Effects Of Development On Hpa Function Following Pubertal Stress, Brittany D. Elliott

Graduate Theses, Dissertations, and Problem Reports (ETD)

For women, two of the greatest risk factors for affective disorders are adversity experienced during puberty and later becoming pregnant. We have created a translationally relevant mouse model where we address these complex risk factors. Previously, we discovered that pregnant mice (dams) that experienced chronic variable stress (CVS) during puberty display a blunted hypothalamic-pituitary-adrenal (HPA) response when exposed to an acute stressor. Interestingly, this alteration only first becomes apparent during pregnancy, which is a sensitive period for these effects due to normative neuroendocrine changes. Further investigation of the mechanisms underlying this dysfunction revealed altered gene expression in the paraventricular nucleus …

Understanding The Relationship Between Landscape Characteristics And Public Preferences: A Case Study In A Proposed Appalachian Geopark Project In Southern West Virginia, United States, Ganga Nakarmi

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this dissertation was to understand the relationship between landscape characters and public preferences in the proposed Appalachian Geopark (pAGP) in southern West Virginia, United States (U.S.). This region was well-known for industrial activities such as coal mining logging and railways during the 1800s. With the diminishing industrial activities, the region was left behind with degraded environmental factors including landscapes and an economically challenged society. Because of these conditions, there is a need to develop this region without further damaging the lands and implement proper land management policies and practices. Understanding characteristics of those lands from the past …

Rather Than To Seem: Black And Indigenous Narratives In A Stormy, Swampy South, Jennifer Denise Peedin

Graduate Theses, Dissertations, and Problem Reports (ETD)

I examine the narratives of the South that have been historically overlooked, ignored, or hidden in order to establish a dominant narrative of the region. The narratives examined here are by southern Black and Indigenous authors who restore lost knowledge and offer histories that help complete the South culturally and ecologically. The conceptual methodology develops from LeAnne Howe’s tribalography which explains that Indigenous people create stories and histories that transform the space around them and offer an understanding of the world around us. Another methodology used is Anthony Wilson’s ecocritical swamp studies; each chapter analyzes a narrative centered around a …

Ambient Ammonia Synthesis Via Microwave-Catalytic Materials And Plasma Chemistry, Siobhan Brown

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ammonia is critical to supporting human life on earth because of its use as fertilizer. The Haber-Bosch process to produce ammonia has been practiced for over 100 years. This process operates at high pressure and temperature to overcome the thermodynamic and kinetic limitations of the ammonia synthesis reaction thus researchers have tried to overcome it for decades. At present this process represents 1% of global energy usage and 2.5% of global CO₂ emissions. The proposed chemical looping ammonia synthesis approach seeks to reduce the environmental impact of this critical process and to elucidate microwave-catalytic principles.

This research aims to …

Epistemological Insecurity In The Anthropocene, Dustin Purvis

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation analyzes how increased mainstream awareness of climate change and other complex environmental phenomena transforms some of the basic tools we use to understand the world, including notions of agency, evidence, and causality. More specifically, this project highlights numerous contemporary literary and cultural narratives that formally and thematically depict impromptu systems of action and comprehension developed by humans confronting the unique forms of information overload that result from damaged and rapidly changing environments. Following critics like Ulrich Beck, Rob Nixon, and Stacy Alaimo, I suggest our current era of ecological instability and destructive environmental practices dictate what I refer …

Experiences Of Transgender Adults Living In West Virginia, Kerry M. Drabish

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Transgender adults experience disrespect, rejection, and discrimination. This is further complicated by the incongruence and internal conflict stemming from pressure to conform to a binary system of gender. Studies describing the experiences of transgender adults are limited. Therefore, the concept coexisting between the assigned and identified self was developed to better understand how transgender adults acknowledge turmoil and marginalization in coming to embrace identity.

Purpose: The purpose of this study was twofold: (1) describe the experiences of transgender adults living in WV, and (2) gather empirical evidence about the concept coexisting between the assigned and identified self. The …

Drivers Of Change In Mindfulness- And Acceptance-Based Interventions With Athletes: Investigating The Influence Of Dosage, Readiness, And Attitudes, Thomas O. Minkler

Graduate Theses, Dissertations, and Problem Reports (ETD)

Mindfulness- and Acceptance-based interventions (MABIs) are being used with increasing frequency with sport participants. Research suggests that such interventions may promote sport performance and impact performance-relevant factors, although the current quality and quantity of research is low. Specifically, questions about intervention engagement (i.e., dosage), potentially impacted by stage of change and attitudes toward sport psychology, need clarification. The present study utilized a multi-method, quasi-experimental longitudinal design with female- and male- identified NCAA collegiate athletes to investigate the effects of an MABI. Specifically, one NCAA Division II team (n = 16) and three NCAA Division III teams (n = …

Descriptions Of Breast Self-Care From Inner-City African American And Hispanic Women Seeking Care In A Comprehensive Breast Care Center, Salamata Yoda

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: A plethora of inquiries has irrefutably revealed a decline in the death rates of breast cancer in some ethnic populations due to timely diagnoses, and enhancement in treatment measures. However, not all women have gained equal access to these innovations in healthcare. Certainly, as a repercussion of the noted disparity, the overall breast cancer prevalence among African American and Hispanic women has steadily escalated. Although no single test can detect all breast cancers early, practicing breast self-care consisting of breast self-awareness (BSA) in combination with other screening methods such as clinical breast exam (CBE), mammogram screening, and a suitable …

On Eulerian Subgraphs And Hamiltonian Line Graphs, Yikang Xie

Graduate Theses, Dissertations, and Problem Reports (ETD)

A graph {\color{black}$G$} is Hamilton-connected if for any pair of distinct vertices {\color{black}$u, v \in V(G)$}, {\color{black}$G$} has a spanning $(u,v)$-path; {\color{black}$G$} is 1-hamiltonian if for any vertex subset $S \subseteq {\color{black}V(G)}$ with $|S| \le 1$, $G - S$ has a spanning cycle. Let $\delta(G)$, $\alpha'(G)$ and $L(G)$ denote the minimum degree, the matching number and the line graph of a graph $G$, respectively. The following result is obtained. {\color{black} Let $G$ be a simple graph} with $|E(G)| \ge 3$. If $\delta(G) \geq \alpha'(G)$, then each of the following holds. \\ (i) $L(G)$ is Hamilton-connected if and only if $\kappa(L(G))\ge …

Driving After Marijuana Use Among Us College Students During The Covid-19 Pandemic, Yuni Tang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: Adolescents and college-aged adults account for a large proportion of the United States population and are susceptible to drugs, including marijuana. Since the late 1960s in the United States, numerous states have legalized marijuana for medical and recreational purposes. These recent policy changes may alter people’s attitudes and behaviors about marijuana use, particularly young adults. The expansion of state-level marijuana legalization may also increase accessibility in younger populations and increase reckless driving behavior associated with marijuana use, including driving after marijuana use. During the COVID-19 pandemic, adolescents and young adults experienced heightened stress and anxiety, which have significantly contributed …

Organizing (Eternal) Identity And Identification: An Upward Glance Into Religious Institutions, Casey M. Stratton

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation disrupts at least two religious spaces: First, scholars religiously adhering to (social) scientific norms, and second, people identifying with religious organizations (i.e., churches). First, we begin constructing a theoretical lens using poststructural ideas offered by Foucault, Derrida, and Bakhtin to read and disrupt (religious) discourse. Second, we complicate organizational identification as a concept, deeming it fixed and fluid—a paradox within religious discourses that endorse Truth and Perfection. Here, we draw from the communication constitutes organization (CCO) approach. Third, we further curate the lens by applying poststructuralism, identification, and CCO in a specific context: The Church of Jesus Christ …

Essays On The Economics Of Law And Crime, Zachary J. Porreca

Graduate Theses, Dissertations, and Problem Reports (ETD)

The first chapter examines the connection between gentrification and urban violence. I demonstrate a positive and plausibly causal relationship between urban redevelopment and gun violence in Philadelphia. As the underlying mechanism, I focus on gentrification's displacement effect on local drug markets. Treating the city as a spatial network of city blocks and using two-way fixed effects differences-in-differences estimators, I show the gentrification of one block increases violence across the surrounding neighborhood. I find that some 2,400 (8%) of Philadelphia's shootings between the years 2011 and 2020 can be attributed to spillover effects from the gentrification of drug blocks. This effect …

Feasibility Of Applying Motion Magnification In Subsurface Defect Detection For Concrete And Fiber-Reinforced Polymer Specimens, Nagavardhani Malineni

Graduate Theses, Dissertations, and Problem Reports (ETD)

Irrespective of size and complexity, every civil infrastructure needs certain scrutiny regarding its structural health to ensure its serviceability during its lifetime. In olden times such scrutiny was done with the aid of destructive testing methods using sensors that required cumbersome and expensive installations and led to the destruction of at least part of the tested specimen. However, in recent times, many non-destructive methods, such as acoustic emission testing, electromagnetic testing, and laser testing methods have emerged, leaving the specified tested specimen undisturbed. With the advancement in sensor technology like motion magnification and with the help of access to high-speed …

Impacts Of Temperature And Salt Concentrations For Thermal Inactivation Of Salmonella In Moisture Enhanced Reconstructed Chicken Patties, Alik D. Browning

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this experiment is to determine the thermal kinetic parameters of Salmonella in moisture-enhanced, reconstructed ground chicken patties as affected by temperatures and salt concentrations. Salmonella is responsible for 35% of the foodborne illnesses associated with poultry products (Batz et al., 2011). Nonintact reconstructed chicken meat is mixed with brine solutions containing various salt and polyphosphate concentrations to increase water-holding capacity, decrease cooking losses, improve sensory tasting scores, and maintain the good quality of completed chicken products (Gill et al., 2004). Increasing salt concentrations within meats can increase the thermal inactivation of pathogens. In this study, Salmonella Typhimurium …

Utility Of An Emotion Coding System For Parent-Child Interaction Therapy With Toddlers, Christopher Kyle Owen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Numerous efficacious early interventions target and alter caregiver-child interactions to promote optimal social-emotional outcomes for young children (Bagner et al., 2014). However, research has primarily relied on the use of caregiver report to assess caregiver-child emotion-focused practices, revealing the need for a behavioral observation assessment (Zinsser et al., 2021). Preliminary evidence suggests that Parent-Child Interaction Therapy with Toddlers (PCIT-T) is a well-received and efficacious intervention for reducing disruptive behaviors, improving child internalizing and externalizing behavior, reducing parental stress, and increasing parental sensitivity (Kohlhoff et al., 2021; Kohlhoff, Cibralic, & Morgan, 2020). PCIT-T strives to train caregivers to interact with their …

A Randomized Controlled Trial Comparing Pcit-Toddler, Circle Of Security, And Waitlist Controls To Improve Child And Caregiver Emotion Regulation, Robin Choi Han

Graduate Theses, Dissertations, and Problem Reports (ETD)

Emotion regulation is an important developmental task during toddlerhood that is associated with positive psychosocial outcomes (Zeman et al., 2006). The development of adaptive emotion regulation during early childhood occurs largely within the context of a supportive caregiver-child relationship (Morris et al., 2007). Thus, parent-mediated interventions are a promising medium through which emotion regulation problems in toddlers can be treated. However, few interventions specifically designed to treat behavioral and emotion regulation difficulties are available for children in the toddler age range, and these interventions have yet to establish a solid evidence base supporting their efficacy. To fill this gap in …

Dynamic Modeling, Data Reconciliation, Parameter Estimation, And Health Monitoring Of A Supercritical Power Plant, Katherine Grace Hedrick

Graduate Theses, Dissertations, and Problem Reports (ETD)

With the introduction of a larger portion of renewable sources of power coming onto the U.S. power grid in recent decades, the operational strategy of coal-fired power plants has changed significantly to focus more on flexibility in response to the changing energy market. This has naturally led to different operational challenges. Many of these challenges are focused on the boilers within these plants, as they are producing more emissions and experiencing increased damage during load-following, which in turn leads to increased costs from penalties for not achieving emission standards or maintenance costs as boilers accumulate damage from the cycling behavior. …