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 …

Tuberculosis-Associated Knowledge, Stigma, And Health Seeking Behavior Among Traders In Onitsha Main Market, Anambra State, Nigeria, Benedeth N. Ezeosim

Walden Dissertations and Doctoral Studies

The utilization of tuberculosis (TB) health care services in a Nigerian state has not been optimal. Many residents do not utilize available health care resources when they experience symptoms of TB. Although much is known about the determinants of health seeking behavior (HSB), there is a gap on how TB knowledge and TB related stigma among traders in one main market contribute to HSB. This study examined the effect of TB knowledge and TB related stigma on HSB among traders. The health stigma and discrimination and health belif models served as the theoretical foundation. A quantitative cross-sectional analytical survey design …

Evaluation Of Renewal During Differential Reinforcement With Asymmetrical Choices And A Context Fading Mitigation Technique, Kacey R. Finch

Graduate Theses, Dissertations, and Problem Reports (ETD)

Successful clinical behavior analytic treatment often results in decreases in challenging behavior and increases in appropriate behavior. These reductions in challenging behavior are often achieved by implementing differential reinforcement of alternative behavior (DRA; Petscher et al., 2009). One variation of DRA to decrease challenging behavior is differential reinforcement with asymmetrical choices, which are two or more concurrently available response options associated with differential outcomes (Fisher & Mazur, 1997; Kestner et al., 2023). However, responding that was previously reduced sometimes reemerges. Specifically, renewal is the reemergence of a previously reduced response following a context change. The first two experiments evaluated renewal …

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 …

Clinicians' Perceptions Of Telehealth Services During The Covid-19 Pandemic In Virginia, Johnetta Hill Guishard

Walden Dissertations and Doctoral Studies

The onset of COVID-19 introduced unprecedented changes to how U.S. public health services were delivered. Many public and private agencies faced mandatory closures, social distancing mandates, and rapid transitions to telehealth interventions and treatment. Mental health clinicians witnessed disruptions in continuity of care and an increase in mental health risks overall. Although some studies have been conducted to survey clinicians’ perceptions of the usefulness and ease of use of technology-based interventions, knowledge about mental health clinicians’ experiences and perceptions in Virginia was sparse. The purpose of this generic qualitative study was to explore how mental health clinicians in Virginia described …

Educator Preparedness In The Use Of Simulation In Nursing Education, Marcelene E. Hart

Walden Dissertations and Doctoral Studies

AbstractNurse educators lack preparation when using simulation as a teaching modality in educating nurses and nursing students within their clinical environment. The purpose of this basic qualitative study was to understand nurse educators’ perceptions of the challenges in preparing for simulation-based training experiences for nurses and nursing students. Vygotsky’s constructivist theory was used as the conceptual framework for the study to emphasize students’ innate ability to learn using active and hands-on processes through simulation experiences. Questions were developed to explore the challenges nurse educators encounter when preparing for simulation activities. Survey questionnaire invitations were sent through email to hundreds of …

Beliefs Of Higher Education Online Faculty Regarding The Integration Of Multimedia, Kimberly Diane Hoyt

Walden Dissertations and Doctoral Studies

Integration of multimedia resources in higher education curricula continues to be a concern for today’s teachers, especially in identifying effective, efficient, and engaging resources that provide individualized instruction and meet a variety of learning needs. However, there was a gap in the literature regarding teachers' beliefs about multimedia integration within the context of adult learning in online higher education. The purpose of this basic qualitative study was to explore the benefits and challenges higher education online teachers experienced when integrating multimedia resources into their courses. The research question explored the beliefs of higher education online instructors about their experiences when …

Evaluating A Virtual Reality Simulation-Based Tool In Undergraduate Nursing Students For Impact On Accuracy, Clinical Judgment, Fear, And Self-Confidence When Donning, Doffing, And Disposing Of Personal Protective Equipment, Stacy Lynn Russell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: PPE training is essential to prevent transmission of infections or autoinoculation of infections among healthcare providers and patients. Student nurses play a vital role in infection control practices to protect themselves and patients from transmittable infections. The purpose of this study was to evaluate an innovative teaching and learning strategy known as virtual reality simulation in teaching proper PPE use in comparison to more traditional learning.

Research Questions: This study aimed to answer three research questions: (1) What is the acceptability among faculty of using a head mounted VRS to train undergraduate nursing students in the proper …

Help-Seeking Behaviors And Employment Hope Among Depressed Black Male Foster Care Alumni, Vanessa Jennings

Walden Dissertations and Doctoral Studies

Traumatic depression is a system of experiences where the mind, heart, and gut track happenings lingering among systemic models of prevention and intervention and personal stories. This nonexperimental correlational study aimed to provide insights into mental help-seeking and employment hope among depressed Black/African American foster care male alums. The central research question was to what degree, if any, a positive relationship exists between employment hope and seeking access to mental health-related services among male foster care alums who identify with depression. It was hypothesized that a statistically significant relationship exists. The social cognitive career theory and theory of planned behavior …

The Enigmatic Nature Of Toxic Masculinity: Utilizing Quasi-Photovoice Methodology To Make Distinctions Between Hegemonic And Toxic Masculinity, Taylor Elizabeth Remsburg

Graduate Theses, Dissertations, and Problem Reports (ETD)

Studies of masculinity are fraught by inconsistent and unclear definitions. A comparison of literature which uses either hegemonic or toxic masculinity as a framework reveals that toxic masculinity can be virtually indistinguishable from hegemonic masculinity. I posit that toxic masculinity is and should be distinct from hegemonic masculinity. Failure to distinguish toxic masculinity from hegemonic masculinity makes toxicity difficult, if not impossible, to operationalize. I designed a vignette survey to clarify the conceptualization and operationalization of toxic masculinity. My vignette survey, which asks participants to respond to prompts regarding both toxic masculinity and masculinity, uses quasi-photovoice methodology to allow participants …

Investigating The Role Of Nudt7-Mediated Peroxisomal Coa Degradation In The Regulation Of Hepatic Coa Levels And Lipid Metabolism, Schuyler Dan Adams Vickers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Coenzyme A (CoA) is a crucial cofactor required to support many essential metabolic processes, including fatty acid oxidation and synthesis, the TCA cycle, and bile acid synthesis. In order to support the proper functioning of these pathways, CoA levels within the cell must be properly regulated. The regulation of CoA levels is achieved through a balance between CoA synthesis and CoA degradation. While the regulation of CoA synthesis has been extensively characterized, the degradation of CoA has received less attention. As such, the contribution of CoA degradation to the regulation of metabolism is poorly understood. NUDT7 is a CoA-specific Nudix …

Antibacterial Effect Of Various Irrigants Against Enterococcus Faecalis, Morgan N. Kesecker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction:

One of the goals of endodontic therapy is to debride infected pulps of teeth and return the tooth to a state of health in preparation of restorative care and return to function. Chemically cleansing of the canal system augments mechanical debridement by flushing out debris, dissolving tissue, and disinfecting the root canal system. The purpose of this research is to compare the efficacy of five irrigants: 0.008% HOCl acid (Endocyn®), 0.03% HOCl (Vashe®), 6% and 8.25% sodium hypochlorite (NaOCl), and Ozone against a typical bacterial species found in infected pulps, Enterococcus faecalis (E. faecalis).

Methods:

After 24 hours …

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 …

A Machine Learning Approach For Early Diagnosis Of Transthyretin Amyloid Cardiomyopathy Among Heart Failure Patients, Tanjim Ahmed

Graduate Theses, Dissertations, and Problem Reports (ETD)

Transthyretin Amyloid Cardiomyopathy (ATTR-CM) is a rare, progressive, and fatal disease. Prevalence of ATTR-CM ranges from 4 to 17 per 100000 cases where the mean survival time is less than 4 years. It has a history of being underdiagnosed and misdiagnosed. The diagnosis delay has a weighted mean of 6.1 years for wild-type ATTR-CM. Low awareness, the necessity of invasive procedures, and lack of treatment are the key reasons for delayed diagnosis. But, with the introduction of non-invasive tests like nuclear scintigraphy with ^99mTC-PYP and the disease modifying drug Tafamidis, the diagnosis delay signifies a missed opportunity to increase …

Investigation Of An Implementation Of Mastery Grading Utilizing Revision And Oral Follow-Up Assessment In An Introduction-To-Proof Course, Nurul Wahyuni

Graduate Theses, Dissertations, and Problem Reports (ETD)

The traditional grading method that utilizes partial credit often falls short of effectively measuring students’ mastery of course material. To address this issue, this study explores the implementation of mastery grading, designed and enacted by the instructor in an introduction-to-proof course. The mastery grading conducted utilized a revision assessment together with an oral follow-up assessment as a mode of reassessing students’ mastery. The objectives of this study were to obtain a thorough narrative of the way the instructor ran the assessment and to evaluate students’ progress throughout the assessment process.

This dissertation is comprised of two distinct studies, both utilizing …

Methane Emissions Produced By Pneumatic Devices And Produced Water Tanks On Natural Gas Wellsites, Benjamin William Thornton

Graduate Theses, Dissertations, and Problem Reports (ETD)

Abstract

Methane Emissions Produced by Pneumatic Devices and Produced Water Tanks on Natural Gas Wellsites

Benjamin W. Thornton

In recent years, more scrutiny has been placed on the release of greenhouse gasses (GHGs) by the oil and gas industry in North America as climate concerns increase. In the coming years, stricter regulations proposed by the Environmental Protection Agency (EPA) concerning the release of GHGs will further direct attention to GHG emissions quantification, modeling, and overall reduction. Active natural gas wellsites employ production equipment that routinely emits methane during normal operation. Production equipment often includes, but is not limited to, gas …

State Estimation, Covariance Estimation, And Economic Optimization Of Semi-Batch Bioprocesses, Ronald Hunter Alexander

Graduate Theses, Dissertations, and Problem Reports (ETD)

One of the most critical aspects of any chemical process engineer is the ability to gather, analyze, and trust incoming process data as it is often required in control and process monitoring applications. In real processes, online data can be unreliable due to factors such as poor tuning, calibration drift, or mechanical drift. Outside of these sources of noise, it may not be economically viable to directly measure all process states of interest (e.g., component concentrations). While process models can help validate incoming process data, models are often subject to plant-model mismatches, unmodeled disturbances, or lack enough detail to track …

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. …

The Impact Of Fracture Properties On Adsorbed Gas Production From A Marcellus Shale Horizontal Well, Valcia Mildreth Vasco Bulule

Graduate Theses, Dissertations, and Problem Reports (ETD)

Abstract

In addition to the gas present in the pores of the rock, shale also contains gas in the adsorbed state within the surface of the organic matter within the formation. As the free gas is produced, the pressure in the reservoir depletes, causing the adsorbed gas to be released, complementing the gas production. At the same time, the pressure reduction leads to increase in the effective stress causing shale compaction. The shale compaction negatively impacts the permeability and hydraulic fracture conductivity. This study aimed to investigate the impact of hydraulic fracture characteristics on the adsorbed gas recovery and, ultimately, …

Sequence Checking And Deduplication For Existing Fingerprint Databases, Tahsin Islam Sakif

Graduate Theses, Dissertations, and Problem Reports (ETD)

Biometric technology is a rapidly evolving field with applications that range from access to devices to border crossing and entry/exit processes. Large-scale applications to collect biometric data, such as border crossings result in multimodal biometric databases containing thousands of identities. However, due to human operator error, these databases often contain many instances of image labeling and classification; this is due to the lack of training and throughput pressure that comes with human error. Multiple entries from the same individual may be assigned to a different identity. Rolled fingerprints may be labeled as flat images, a face image entered into a …

Computational Mechanisms Of Face Perception, Jinge Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

The intertwined history of artificial intelligence and neuroscience has significantly impacted their development, with AI arising from and evolving alongside neuroscience. The remarkable performance of deep learning has inspired neuroscientists to investigate and utilize artificial neural networks as computational models to address biological issues. Studying the brain and its operational mechanisms can greatly enhance our understanding of neural networks, which has crucial implications for developing efficient AI algorithms. Many of the advanced perceptual and cognitive skills of biological systems are now possible to achieve through artificial intelligence systems, which is transforming our knowledge of brain function. Thus, the need for …

Drought Effects On Biofuel Feedstock Production By Populus Trichocarpa, Marvin Jacob Wright

Graduate Theses, Dissertations, and Problem Reports (ETD)

As the world population continues to increase, so does the need for sustainable sources of fuel. Biofuels are of particular interest and could be an economically feasible fuel source given the right conditions. Populus trichocarpa, is a rapidly growing plantation species that, in addition to having a fully sequenced genome available for study, displays a wide range of phenotypic traits among genotypes. By analyzing these differences in both plantation and more controlled greenhouse settings, we aimed to discover which genotypes performed the best under drought conditions, and which physiological mechanisms granted them that high performance. In the field, differences in …

Structural Health Monitoring Using Machine Learning And Synthetic Data, Michail Tzimas

Graduate Theses, Dissertations, and Problem Reports (ETD)

Structural health monitoring spans many decades of research across multiple engineering fields. However, typical monitoring processes for damage detection of complex structures usually prohibit real-time or fast detection of debilitating damage to the structure. One of the major issues of real-time detection of damage is the enormity of data that needs to be processed, which is worsened by the relative inability of fast relaying of data to structural engineers. With the rapid advancement of Machine Learning, both issues can be overcome, and detection of failure is achieved with non-invasive techniques. This dissertation explores the applicability of Machine Learning as a …

What’S Long About Long John Silver: Anormative Masculinities And Histories In Robert Louis Stevenson’S Treasure Island, David V. Riser

Graduate Theses, Dissertations, and Problem Reports (ETD)

Historical queer and transgender experiences have been obscured by the dominant narrative of history. However, these experiences surface in works of fiction. This thesis analyzes affective responses to constructions of queer masculinity in Robert Louis Stevenson’s Treasure Island. Affects of disgust and desire in Treasure Island, and in the popular history of Treasure Island, reveal a proto-queer transgender experience found in 19th-century maritime fiction. These affects demonstrate a fear that there is no reproductive futurity in queer masculinity while producing narratives of queer masculinity. This production makes historical queer and transgender experiences legible, and allows contemporary queer readers to navigate …

Confluence: Evaluating The Individual Learning Outcomes Of A Combined Citizen Science And Environmental Education Project, Evan A. Harms

Graduate Theses, Dissertations, and Problem Reports (ETD)

Citizen Science has moved beyond a methodological tool for ecologists to crowdsource data to a novel platform for environmental and informal science education. However, few studies document the individual learning outcomes of citizen science as an educational tool, particularly in youth or extension education. This quantitative study focused on evaluating the individual learning outcomes of an environmental education and citizen science non-formal learning experience about water quality.

In this study, an existing lesson plan using four sequenced activities was adapted for use with West Virginia 4-H summer camps in 2022. Potential outcome areas were first identified from foundational environmental education …

The Effects Of E-Cigarette Aerosol On The Force Degradation Of Elastomeric Chain: An In Vitro Pilot Study, Nicholas David Palmer

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and Objectives

An ideal orthodontic force system should exert continuous light force. An orthodontist has the option to utilize different systems for closing orthodontic extraction space. A commonly used method when closing extraction space is to utilize orthodontic elastomeric chain. Energy Chain® (Rocky Mountain Orthodontics, Franklin, IN) allows for less deformation of shape following the initial stretch, more consistent force, and less force degradation over time. The mouth is a harsh environment that experiences daily changes in pH and temperature. These changes cause elastomeric chain to experience increased force degradation. The creation of the JUUL® (JUUL Labs, San Francisco, …

Botanical Folktales, Jameson Frances Mulac

Graduate Theses, Dissertations, and Problem Reports (ETD)

This written document is the accompanying thesis for my Master of Fine Arts Exhibition, Botanical Folktales, shown in the Laura Mesaros Gallery at West Virginia University (displayed March 20-23, 2023). It documents the research, motivations, and processes presented in the artwork displayed throughout the gallery. Through prints and artist’s books this body of work represents my pursuit to connect, understand and share gratitude for native plants of Appalachia. Plants are my muse to reconnect and learn about the living environment. Not only do plants hold stories and signify different meanings in every culture, but also nourish our bodies and bring …

Investigating The Impact Of Demographic Factors On Contactless Fingerprint Interoperability, Aeddon David Berti

Graduate Theses, Dissertations, and Problem Reports (ETD)

Improvements in contactless fingerprinting have resulted in contactless fingerprints becoming a faster and more convenient alternative to contact fingerprints. The interoperability between contactless fingerprints and contact fingerprints and how demographic factors can change interoperability has been challenging since COVID-19; the need for hygienic alternatives has only grown because of the sudden focus during the pandemic. Past work has shown issues with the interoperability of contactless prints from kiosk devices and phone fingerprint collection apps. Demographic bias in photography for facial recognition could affect photographed fingerprints. The paper focuses on evaluating match performance between contact and contactless fingerprints and evaluating match …

Developing Collaborative Skills In Piano Students, Linxi Yang

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research paper explores how to develop collaborative skills in piano students at the college level. It offers a brief history of collaborative study and performance, describes the specifics of working with singers and instrumentalists in duo, chamber and large ensemble repertoire, and includes musical examples and selected resources. This paper is intended to enrich the activities of teachers and collaborative pianists through the description and application of specific skills and to provide pathways for effective professional collaborations.

Simulations Of Implementation Of Advanced Communication Technologies, Ivy Yousuf Moutushi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wireless communication systems have seen significant advancements with the introduction of 3G, 4G, and 5G mobile standards. Since the simulation of entire systems is complex and may not allow evaluation of the impact of individual techniques, this thesis presents techniques and results for simulating the performance of advanced signaling techniques used in 3G, 4G, and 5G systems, including Code division multiple access (CDMA), Multiple Input Multiple Output (MIMO) systems, and Low-Density Parity Check (LDPC) codes. One implementation issue that is explored is the use of quantized Analog to Digital Converter (ADC) outputs and their impact on system performance.

Code division …