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Survival Rate Of Dental Implants Placed In Alveolar Ridge Preservation Sites - Systematic Review, Sravanthi Papisetti

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: It is not known so far performing Alveolar Ridge Preservation (ARP) in a freshly extracted socket with intact walls would improve clinical outcomes of implants placed in these sites. It is not known whether different biomaterials and techniques would affect the survival of dental implants.

Aim: The current systematic review is undertaken to assess the survival rate of dental implants placed in these sockets and to assess different socket graft materials as well as techniques of ridge preservation with regard to the survival of implants.

Material methods: Search for relevant articles was done in Medline (PubMed). No …

Nursing Education For Central Line-Associated Bloodstream Infections In Intensive Care Units, Carren Sandra Mullings

Walden Dissertations and Doctoral Studies

Central line associated blood stream infections (CLABSIs) are the most acquired hospital infection in the United States. CLABSI is caused by bacteria that enter the bloodstream through a central line. In the United States, CLABSI has a mortality rate of 18%, and every year 250,000 people are infected. Of these, 30,000 patients die due to CLABSI infections, hospital stays are prolonged, and hospital costs are increased. Patients in an intensive care unit (ICU) are more exposed to CLABSI because of procedures that break tissues and skin, such as the insertion of a central line. A gap in practice was identified …

How Teachers Support Students' Nutrition And Healthy Choices To Reduce Childhood Obesity, Angela Munns

Walden Dissertations and Doctoral Studies

Obesity is an issue that negatively effects the health and wellbeing of children across theU.S. The problem addressed by this study was the increasing percentage of obesity among elementary students in a southeastern school district. Guided by Bandura’s social learning theory, the purpose of this basic qualitative study was to explore the perceptions of elementary teachers about increasing student obesity and the challenges they faced in teaching students about health issues in the local school setting. Ten elementary teachers who had knowledge of nutrition and awareness of the student obesity and overweight issues at the study site participated in semistructured …

Screen Media Use Among Children And Adolescents – Applications Of Supervised And Unsupervised Machine Learning And Sentiment Analysis, Yifan Zhang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Screen media has become increasingly pervasive in our everyday lives and has profoundly changed the way people communicate and interact with each other. However, we are still unclear about the long-term influence of screen media use on our physical health, mental health, and social wellbeing. Children and adolescents are in an important stage of brain development and are susceptible to the environmental influence that screen media possess. This dissertation pursued three aims to address research gaps related to screen media use among children and adolescents: 1) identify topics and knowledge gaps in screen media use research among children and adolescents …

Project Management Strategies For Success—The Case Of Zambia, Ngoza Chilonga Munthali

Walden Dissertations and Doctoral Studies

Construction project managers who fail to implement infrastructure projects successfully negatively impact organizational performance and profitability. Grounded in the contingency management conceptual framework, the purpose of this qualitative multiple case study was to explore strategies Zambian construction project managers use to avoid infrastructure project failure. The participants comprised five construction project managers in Lusaka, Zambia, who reduced infrastructure project failures. Data were collected from semistructured interviews and a review of organization project documents. The Marshal and Rossman seven-step process was used to analyze the data. The following themes emerged: effective project planning, execution, and closure; effective communication; and effective collaboration …

Quantifying Water Security In West Virginia And The Potomac River Basin, Eric Carl Edvard Sinius Sjostedt

Graduate Theses, Dissertations, and Problem Reports (ETD)

All healthy ecosystems, communities, and economies are founded on access to clean, adequate water sources to support ecosystem services, provide clean drinking water, and allow the production of water-intensive goods and services. The state of available water resources must be analyzed through the lens of water security, defined as the capability to safeguard sustainable access to adequate quantities of acceptable quality water for people, the economy, and ecosystems. Mountain regions are sources of freshwater resources for downstream regions, which produce disproportionately higher runoff than downstream regions. As a result, mountain regions are often referred to as natural water towers …

Thermochemical Water-Splitting Using Novel High-Entropy Perovskite Oxides, Hector Alexis De Santiago Hernandez

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this project, we designed, synthesized, and tested the transformative (La_0.8Sr_0.2)(Mn_[1-x]/3Fe_[1-x]/3Co_xAl_[1-x]/3)O₃ (0 ≤ x ≤ 1.0) high-entropy perovskite oxides (HEPOs) as redox active oxygen carriers for thermochemical hydrogen production with improved stability, kinetics, and H₂ yield. The developed HEPOs form an R3c (hexagonal) phase and were successfully synthesized using both the Pechini and solid-state reactions with the latter synthesis being the primary source for testing. These innovative perovskites demonstrated an improved kinetics with oxygen surface exchange coefficient, k, greater than 7.5 x 10^-4 cm/s, …

Transitional Experiences Of Young African American Women In Foster Care, Tiarra Michelle Myers

Walden Dissertations and Doctoral Studies

Emancipated foster youth continue to experience fewer positive outcomes after foster care despite the changes in legislation and the implementation of additional transitional living programs and supports such independent living programs. This quantitative research study followed a non-experimental, secondary data analysis to examine how independent living programs impact the outcomes for African American young women who have transitioned out of the foster care system compared to their Caucasian young women peers at age 17 and age 21. The exploratory study used data from the Children’s Bureau National Youth in Transition Database (NYTD) Cohort 2. A cross-section comparison analysis was conducted …

Exploring How Children Use Their Everyday Thinking To Construct Scientific Explanations Of The Natural World, Ashley Nicole Kooken

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this qualitative grounded theory study was to describe and explain children’s thinking present in multiple related contexts surrounding a single Earth Space disciplinary core idea in order to provide insight on whether and how children’s everyday thinking forms the basis for learning in science classrooms. As most previous work on children’s thinking focuses more on what ideas and thinking are present within specific science learning contexts, there is a knowledge gap as to how children’s everyday ideas across multiple contexts provide the basis from which they construct a deeper conceptual understanding about scientific phenomenon in the world …

Exploring Vaccination Hesitancy Among Nonmandated Nurses And Health Care Workers, Germaine Lazett Nelson

Walden Dissertations and Doctoral Studies

COVID-19 vaccinations have been mandated for most healthcare professionals providing direct patient care, but there are a group of nonmandated healthcare professionals who have been hesitant to receive the vaccine. Given prolonged hesitancy among key health professionals charged with providing direct patient care, it is crucial to understand why they are hesitant; their apprehension may impact the pool of professionals available to provide direct patient care. This is a cross-sectional quantitative study that included an online survey. The health belief model served as the theoretical framework. The research questions addressed whether there is an association between type of patient care …

Controlling The Thermal And Electrical Properties Of Camno3-Δ Based Perovskite Ceramics, Sergio Andres Paredes Navia

Graduate Theses, Dissertations, and Problem Reports (ETD)

Most of the energy lost during the conversion process comes in the form of waste heat. The world's energy consumption loses over 60% of its energy after conversion. In order to increase the efficiency of the conversion process, it is essential to harness waste heat and reutilize this energy resource. Heat recovery technology as thermoelectric (TE) technology is one of the growing alternatives to harvest excessive amounts of energy lost as waste heat for a more efficient, safe, and sustainable future. Due to the Seebeck effect, TE materials have the potential to convert waste heat directly into electricity, improving efficiency …

Tax Avoidance, Corporate Governance, And Corporate Policies, Yang Yang

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation includes three essays examining the interactions between tax avoidance, corporate governance, and corporate policies. The first essay exploits corporate governance shocks induced by cross-listing in the U.S., and find that firms tend to engage in less tax avoidance after cross-listing. This effect is more pronounced for firms that experience significant improvements in corporate governance, and for firms from countries with weaker shareholder protection and disclosure requirements. Taken together, the results indicate that cross-listing in the U.S. helps align the interests of managers and shareholders and reduces managerial diversion.

The second essay examines the importance of tax avoidance to …

Examining The Efficacy Of A Self-Paced Online Training For Goal Writing, Allison Rosborough

Graduate Theses, Dissertations, and Problem Reports (ETD)

Educational goals can control critical aspects of intervention and progress monitoring for students with disabilities and as such are a central feature of Individualized Education Programs (IEPs). Despite its importance, school staff frequently report not receiving enough training or support on IEP documentation. Rosborough and Brandel (2020) investigated the quality of IEP goals written in the state of West Virginia. Findings indicated that professional development activities needed to be designed and analyzed related to immediate and long-term efficacy. The purpose of this study was to evaluate the efficacy of a self-paced, online training for goal writing. Participants were recruited by …

Experiences Of Women In Sierra Leone Relating To Accessing Breast Cancer Treatment, Anne Neville

Walden Dissertations and Doctoral Studies

There has been a lack of consistent access to breast cancer care and treatment for women in developing countries, especially in Sierra Leone. Limited access to breast cancer care and treatment is a significant problem for women diagnosed in the later stages of the disease. The purpose of this research was to understand the experiences of women diagnosed with different stages of breast cancer, how they went about accessing breast cancer care and treatment, and how those experiences can be used to improve access to breast cancer treatment in Sierra Leone. Andersen and Newman’s healthcare utilization model guided the study’s …

A Preoperative Intervention To Improve Glycemic Control In Surgical Patients With Diabetes, Kelsey L. Boyd

Graduate Theses, Dissertations, and Problem Reports (ETD)

Perioperative hyperglycemia is reported in 20-40% of patients undergoing general surgery and is an independent risk factor for negative surgical outcomes. Patients with diabetes presenting to a local community hospital are at risk for negative surgical outcomes due to the lack of strategies to prevent perioperative hyperglycemia. This project aimed to implement and evaluate the usefulness of succinct diabetes education for preoperative total joint surgical patients with diabetes. The intervention was a nurse-led, face-to-face diabetes education session provided to total joint surgical patients with diabetes during a preoperative evaluation appointment, compared to usual care (no preoperative diabetes education). This project …

Carbon Emissions, Abatement, And Natural Disasters: Politics And Social Institutions, Ritika Khurana

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation empirically examines three issues related to renewable energy and international development: 1) The Political Economy of Solar Initiatives in the Sunshine State; 2) Climate Change, Natural disasters, and Institutional Integrity; and 3) Institutional Integrity and Carbon emissions.

In Chapter 2, I empirically examine the outcomes of two solar energy amendments that were on the ballot in Florida in 2016. One amendment exempts solar energy devices from ad valorem taxation of real estate property, effectively decreasing the cost of solar energy for those who adopt solar photovoltaic panels. The other amendment reaffirms the right of property owners to install …

Studies Of Electromagnetic Counterparts To Gravitational-Wave Sources And The Nonlinear Gravitational-Wave Memory Effect, Ashok Choudhary

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this dissertation, theoretical/computational results are presented from the investigations of three different topics within the general research areas of gravitational wave astrophysics and electromagnetic counterparts. First, general relativistic force-free electromagnetic theory and its application to black hole magnetospheres are discussed. In this connection, simulations of a binary black hole merger are examined using the open-source software, GiRaFFE, which is used to model black holes’ magnetospheres and to study supermassive black-hole binary mergers in an external magnetic field. In the simulations, a helical magnetic field structure around each black hole is observed. Electromagnetic energy flux is observed during the inspiral …

Genetic Assessment Of Lake Sturgeon Stocking Practices In Two Lake Superior Tributaries, Mary E. Akers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Lake sturgeon were extirpated throughout much of their historic range in the early 1900s due to overharvest, habitat degradation, and reduced water quality. Interagency management plans have worked to identify historic locations and remnant populations suitable for stocking and habitat remediation to rebuild self-sustaining populations of lake sturgeon within their historic range. The St. Louis River population was extirpated in the early 1900s until lake sturgeon were stocked from 1983-2000 from two different source populations (Wolf River, Sturgeon River). Natural reproduction was confirmed in 2011 and F1 generation larvae were collected in 2017 (n = 41) and 2019 (n = …

Understanding The Perspectives Of African American Gay And Bisexual Men Toward Hiv, Victor Onwezi , Ikechukwu Nwanguma

Walden Dissertations and Doctoral Studies

There is an urgent need to stop the HIV epidemic among African American gay and bisexual men in the United States. The purpose of this basic qualitative study was to identify the health issues responsible for the HIV epidemic among African gay and bisexual men. Two theoretical frameworks that guided the study were the transtheoretical model and the syndemic theory. The study's research involved understanding African American gay and bisexual men's perspective toward HIV infections and their understanding of possible reasons HIV rates appear to increase in their community. Semi-structured telephone interviews and field notes were used to collect primary …

Population And Migratory Ecology Of Canada Warblers (Cardellina Canadensis) In The Central Appalachian Mountains, West Virginia, Usa, Stephanie H. Augustine

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nearctic-Neotropical migrant birds experience a wide range of environmental conditions throughout their annual cycle; thus, it is particularly challenging to evaluate the spatial factors that may influence population growth. The Canada Warbler (Cardellina canadensis) faces substantial range-wide population declines, but little study has been conducted regarding elements occurring across the entire year that drive demographic rates. The aims of this research are (1) determine the relationship between Canada Warbler population demographic rates and environmental conditions along an elevation gradient in the central Appalachian Mountains and (2) ascertain the nonbreeding season location and migratory routes used by the central …

An Analysis On Adversarial Machine Learning: Methods And Applications, Ali Dabouei

Graduate Theses, Dissertations, and Problem Reports (ETD)

Deep learning has witnessed astonishing advancement in the last decade and revolutionized many fields ranging from computer vision to natural language processing. A prominent field of research that enabled such achievements is adversarial learning, investigating the behavior and functionality of a learning model in presence of an adversary. Adversarial learning consists of two major trends. The first trend analyzes the susceptibility of machine learning models to manipulation in the decision-making process and aims to improve the robustness to such manipulations. The second trend exploits adversarial games between components of the model to enhance the learning process. This dissertation aims to …

Exploring Cyberterrorism, Topic Models And Social Networks Of Jihadists Dark Web Forums: A Computational Social Science Approach, Vivian Fiona Guetler

Graduate Theses, Dissertations, and Problem Reports (ETD)

This three-article dissertation focuses on cyber-related topics on terrorist groups, specifically Jihadists’ use of technology, the application of natural language processing, and social networks in analyzing text data derived from terrorists' Dark Web forums. The first article explores cybercrime and cyberterrorism. As technology progresses, it facilitates new forms of behavior, including tech-related crimes known as cybercrime and cyberterrorism. In this article, I provide an analysis of the problems of cybercrime and cyberterrorism within the field of criminology by reviewing existing literature focusing on (a) the issues in defining terrorism, cybercrime, and cyberterrorism, (b) ways that cybercriminals commit a crime in …

Effects Of Depression And Stress On Oral Self-Care Among Perinatal Women In Appalachia: A Longitudinal Study, Jeongwi An

Graduate Theses, Dissertations, and Problem Reports (ETD)

Oral health during the perinatal period has an impact on the health of women and their offspring. Oral self-care behaviors are preventive methods that can be employed to maintain or improve oral health but may be compromised during the perinatal period. Identifying factors affecting oral self-care behaviors might provide direction on how to intervene in oral health during and after pregnancy. The purpose of this study was to investigate independent and interactive effects of depression and stress on oral self-care behaviors of perinatal women in Appalachia, given the burden of oral disease in this region. A total of 1,172 women …

Sacramental Ethnicity: Women’S Culture And Vernacular Religion In Twentieth-Century America, Aaron J. Rovan

Graduate Theses, Dissertations, and Problem Reports (ETD)

This project examines the reciprocal and evolving relationship between American women’s culture, vernacular religion, and the social development of American ethnicity. This project focuses on the roles of white ethnic women, both literary and real, in the construction, maintenance, and transmission of ethnic identity. The project highlights the connections between the folkloric performances of vernacular religion and the discursive articulation of ethnicity by focusing on two women writers and two groups of Slovak American women. The fiction of Kate Chopin and Anzia Yezierska illustrates how literary authors bring their contemporary concepts of folklore into their writing. The writings of these …

Birthplace Decision Making Experiences Of The Ugep Women Of Southern Nigeria, Thomas Okoi Ofem

Walden Dissertations and Doctoral Studies

The purpose of this basic qualitative study was to explore and describe how behavioral, normative, and control beliefs shape women's birthplace decision-making experiences. The study sought to better understand how Ugep women of southern Nigeria decided where to give birth after attending antenatal care. Using the theory of planned behavior as a framework, a purposeful sample of nine women aged 25 to 35 years who attended antenatal clinic at least twice at the selected primary health facility but gave birth at home during the past year was recruited. Data collection was through face-to-face, semistructured interviews. Audio recordings of interviews were …

Fashion Compatibility Prediction Using Ensemble Learning, Nathan Utzman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fashion is important both financially and for self-expression. There are many tasks in the fashion domain which can be addressed with artificial intelligence. The task of fashion compatibility prediction is to determine how well a set of items work together to form an outfit. Two main tasks are typically used to evaluate the performance of a fashion compatibility prediction model – Outfit Compatibility Prediction and Fill in the Blank.

In this work, a compatibility prediction model, which is based on the graph autoencoder, is evaluated. This same model is then used in a homogeneous ensemble learning approach, proposed to improve …

The U.S. Coal Industry: Market Structure & Implications, Sara Elizabeth Guffey

Graduate Theses, Dissertations, and Problem Reports (ETD)

The U.S. coal mining industry was once a booming industry which created and defined communities, particularly in Appalachia. The industry has, however, transformed significantly in the last couple of decades with the passage of environmental policies, with competition from the Shale Revolution, from changes in company ownership, and from mine safety regulation. Overall, the coal industry during this time has experienced a massive decline in production and employment. This dissertation is composed of three papers that investigate these mechanisms and their role in understanding market structure, coal transactions and prices, and mine safety outcomes. Motivated by the shutdowns of U.S. …

“The Illusion Of Collaboration”: An Integrated Examination Of The Antecedents, Processes, And Consequences Of Online Group Work, Jill Cathleen Woods

Graduate Theses, Dissertations, and Problem Reports (ETD)

Computer-supported collaborative learning (CSCL) presents postsecondary educators with a conundrum: how to design and support small-group activities without stifling deep and meaningful learning. The literature indicates that students are not consistently practicing higher-order cognitive activities, educators are not reliably designing or facilitating them, and/or researchers are not locating or identifying them where they are occurring. The aim of this dissertation is to explore these deficits by identifying the antecedent conditions that most affect collaboration. Specifically, I answer the question, how do learner’s prior knowledge, characteristics, and experiences manifest in their collaborative processes. Addressing a gap in the literature, this study …

Learning Mathematics While Black In Rural Appalachia: Black Students' Counterstories And Freedom Dreams About Mathematics Education, Sean P. Freeland

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation aims to illuminate and uncover the experiences of Black students’ learning mathematics in rural Appalachia and specifically West Virginia. The focal theory for this study is Critical Race Theory (CRT) which centers the experience of Black students and their voices. The intersection of race, mathematics education, and the context of rural Appalachia contribute to the analysis of these experiences in specific ways. Participants for this study included six Black high school students from various communities throughout West Virginia. Through interviews and mathematical autobiographies, these students shared their experiences learning mathematics across their schooling experiences and also considering their …

Nurses’ Knowledge Of Cognitive Behavioral Therapy As A Treatment For Schizophrenia, Iwalola Stella Omojola

Walden Dissertations and Doctoral Studies

Existing evidence indicates that medications alone are not able to fully manage the psychotic symptoms associated with schizophrenia. Inadequately treated schizophrenia not only affects a patient's physical and mental health but also can lead to the onset of more complex issues such as substance and alcohol abuse disorders, homelessness, family conflicts, and violent behavior. Cognitive behavioral therapy (CBT) can assist in bridging the gaps associated with the use of medications in the treatment of schizophrenia. The purpose of this project was to increase the knowledge of nurses working at a private healthcare facility regarding the effective utilization of CBT as …