Digital Commons Network^™

Photoelectrical And Photoelectrochemical Characterization Of The Materials Used In Dye-Sensitized And Perovskite Solar Cells., Pom Lal Kharel

Electronic Theses and Dissertations

Solar energy is one of the most important alternative renewable energy sources to fulfill the increasing demand of energy in the world. Third-generation solar cells like dye-sensitized solar cells, perovskite solar cells, quantum dot solar cells, and organic solar cells are extensively studied to increase their photoconversion efficiency, and ultimately for their large-scale implementation. A dye-sensitized solar cell consists of a photoanode of a mesoporous film of titania sensitized with dye sandwiched with a counter electrode, which is usually a platinum-coated transparent conducting oxide, and a redox couple injected between the photoanode and counter electrode. Doping titania with rare-earth metal …

Studying Abroad And Intercultural Outcomes: Differences Experienced Between International Exchange Students And U.S. Study Abroad Students, Patricia V. Lin-Steadman

Electronic Theses and Dissertations

A major focus of many U.S. higher-education institutions is to increase internationalization of their campus through, in part, the promotion of study abroad experiences among domestic students and to recruit and retain international students to their institution. This study explored the effects of certain factors on various domains of the Global Engagement Measurement Scale (GEMS) – Cultural Engagement, Ambiguity Tolerance, Knowledge of Host Site, and Diversity Openness – among U.S. students who have studied abroad and international exchange students who have studied in the U.S. There was a particular focus, on determining whether U.S. study abroad students, compared to international …

“We Didn’T Have A Lot Of Money, We Worked Hard, And We Ate Beans”: Examining The Narrative Inheritance From An Appalachian Father To His Son, Thomas Townsend

Electronic Theses and Dissertations

The author contends that narratives, shaped not only by events but also by socioeconomic and geographic factors, are narratives that require exploration and analysis because these narratives build the lives in which individuals exist. By understanding narratives passed down with which they have built their lives, individuals can come to greater understanding of the narratives in which they live. To understand the narratives, he created and continues to craft about his life, the author needed to understand his narrative inheritance. When a proposed thesis study imploded, the focus of the study shifted to exploring the circumstances of a single interview …

Chronic Effects Of Methylphenidate On Neuronal Viability And Plasticity, Hannah Oakes

Electronic Theses and Dissertations

Methylphenidate (MPH) is the most commonly prescribed drug to treat Attention Deficit Hyperactivity Disorder (ADHD). ADHD is now considered a life-long disorder; therefore, patients take MPH from adolescence into adulthood, highlighting the need for research studying chronic MPH use. MPH increases dopamine and norepinephrine within the synaptic cleft; therefore, chronic use of MPH may lead to changes within important dopaminergic pathways. One pathway, the mesolimbic pathway, includes the hippocampus, an area where adult neurogenesis occurs. We investigated the effects of chronic low and high doses of MPH on neurogenesis and examined levels of a few key proteins linked to cell …

Navigating The Athletic Terrain For Transgender Athletes: Identity, Policy, And The Future, Lia M. Bevins

Electronic Theses and Dissertations

Transgender athletes face scrutiny because they do not fit within the traditional and constructed bounds of male and female. The objective of this study was to discover how to provide advocacy to this marginalized population amidst discriminating policies and transphobic environments. The research included a survey of high school coaches from thirty schools throughout Tennessee along with interviews with five transgender athletes from across the United States. All five athletes reported that leaders were the most impactful allies in their lives and can be the main sources of advocacy for transgender athletes. Survey findings showed that not every coach throughout …

Teacher Perceptions Of Social Emotional Learning Supports In Freshman Academy, Nadia Saint-Louis

Electronic Theses and Dissertations

Ninth grade year is the most important challenging year of high school. Many students struggle adjusting to the transition to high school. If supports are not in place, many ninth-grade students are at-risk of dropping out of school. The purpose of this study was to identify and examine the social emotional learning supports in Freshman Academy that assist in the transition to High School. A qualitative investigation was conducted to explore these social emotional supports. This study used a phenomenological methodology, enabling the researcher to gather information from a purposeful selection of educators directly identified by their Academy Principals.

This …

Collectivism, Individualism, And Interprofessional Education: A Comparison Of Faculty Across Five Academic Health Sciences Colleges, S. Alicia Williams

Electronic Theses and Dissertations

Collaborative practice among interprofessional groups of health care providers is essential to the provision of safe and effective medical care. However, health professions training programs have not traditionally prepared students for interprofessional practice. One challenge in transforming health professions education programs has been a limited number of faculty prepared to teach students in an interprofessional learning environment. Thus, faculty development programs aimed at preparing faculty to provide interprofessional learning experiences across disciplines are increasingly important. Unfortunately, best practice in training faculty for interprofessional education programs is not well-defined.

Interprofessional education faculty development programs should aim to train faculty to model …

Predator-Avoidance Of Larval Black-Bellied Salamanders (Desmognathus Quadramaculatus) In Response To Cues From Native And Nonnative Salmonids, Brian L. Dempsey

Electronic Theses and Dissertations

The introduction of nonnative salmonids into Southern Appalachia may pose a threat to resident salamander populations. In recent years, the stocking and encroachment of rainbow trout (Oncorhynchus mykiss) into headwaters where the black-bellied salamander (Desmognathus quadramaculatus) and brook trout (Salvelinus fontinalis) naturally coexist has raised concerns. In aquatic prey, predator-avoidance responses are primarily influenced through the detection of chemical cues released from predators. The objective of this study was to determine how co-occurrence with a predator influences black-bellied salamander predator recognition behavior. To evaluate this, salamander activity metrics (general activity, number of movements, and latency to move) were recorded before …

Measurement Of Nontheistic And Theistic Spirituality: Initial Psychometric Qualities Of The Inclusive Spiritual Connection Scale, Valerie M. Hoots

Electronic Theses and Dissertations

Spirituality represents a key part of life for the majority of U.S. adults and there is a growing body of research supporting relationships between spirituality and numerous health outcomes. Governing healthcare organizations have acknowledged the role religiousness and spirituality play in comprehensive and holistic patient care. While the U.S. shows documented trends towards diverse expressions of spirituality, existing theory-driven measures of spirituality are largely theocentric. The current study concludes a multiphase project that aimed at the outset to develop an inclusive measure of spirituality and establish initial psychometric evidence, validating its use across both theistic and nontheistic spiritual populations. The …

Identifying The Need For Trained Machinists In The Greater Tri-Cities Area, Bradley Stufflestreet

Electronic Theses and Dissertations

Machinists are skilled tradespeople responsible for running a variety of machine tools to produce precision components for end-users or use in other manufacturing. This project identifies the current and future change in the number of machinists in the Tri-Cities area, especially the five-county service area of Northeast State Community College. Using an industry survey, the need for machinists is identified and evaluated to understand local employers’ needs. The results indicate industry needs more machinist to keep up with demand, as 6 out of 14 companies have open positions and, 8 reported difficulty filling openings. Furthermore, most companies are growing or …

Immune Activation Induces Telomeric Dna Damage, Reduces Memory Precursors, And Promotes Short-Lived Effector T Cell Differentiation In Chronic Hcv Infection, Lam Nguyen

Electronic Theses and Dissertations

Chronic hepatitis C virus (HCV) infection exhibits persistent high viral load, inducing T cells differentiation and dysfunction in chronically infected individuals. Recent longitude studies in both HCV specific- and bulk T cells reveal that chronic immune stimulation is the driving force for the impaired T cell functions, however, the underlying mechanisms remain elusive. Here, we show that peripheral CD4⁺ T cells from chronically HCV-infected patients exhibit lymphopenia with the reduction of naïve population and expansion of effector memory T cells. CD4⁺ T cells from HCV patient also display elevated activation markers. including HLA-DR, GLUT1, Granzyme B, and short-lived …

The Relationship Between The Amount Of Time Spent In The Block Center And Gender Differences In Preschool Children’S Spatial Performance, Narges Sareh

Electronic Theses and Dissertations

The current study investigated whether there is a relationship between the amount of time children spend in the block center and their spatial skills, as well as the gender differences in the amount of time children spend in the block center and in their spatial skills. In addition, other factors influencing spatial skills were examined (e.g. child’s age, parents’ level of education). Using a correlational quantitative design, 75 preschoolers in eight Head Start classrooms were observed three times during their free play time. An existing instrument was used (TOSA: Verdine & Golinkoff, 2018) to measure children’s spatial skills. In addition, …

Undergraduate Nursing Students’ Learning Style Preferences And Preferred Faculty Teaching Methods Compared To The Actual Methods Used By Faculty, Linda Simpson

Electronic Theses and Dissertations

Aim. The aim of this study was to examine the generational differences of undergraduate nursing students’ learning style preferences and their preferred faculty teaching methods to the teaching methods used most often by nursing faculty in the classroom.

Background. Nursing educators are responsible for creating learning environments that are effective for students that are in different generations and nursing educational pathways. Each generational cohort brings a collective set of characteristics, expectations, and preferences to the classroom, challenging educators to balance the generational learning styles of all students with respectable, evidence-based, pedagogical approaches. This study was one of the …

Beating The Odds: Perseverance And Its Influence On Male Students’ Perceptions In Overcoming Generational Poverty, Grady C. Bailey Jr

Electronic Theses and Dissertations

This phenomenological study examined the perceived influences that male graduates from Title I high schools attribute to their success. During the last 30 years the poverty gap has not narrowed and in some cases it has increased. This study hoped to provide evidence of supports needed by looking at males who overcame generational poverty. This study included qualitative data collection from interviews of 15 male participants. Nine themes emerged in the findings of perceived influences by these participants. The nine themes identified where 1) Success has two components; internal and external, 2) School personnel and programs guided success, 3) Change …

Determining The Physiological And Behavioral Responses To Elevated Salinity In The Freshwater Bivalves, Corbicula Fluminea And Lampsilis Ovata, John W. Roden

Electronic Theses and Dissertations

Salinization has been identified as an increasing threat to freshwater mussel diversity in recent years. Native mussels have been observed to display reduced salinity tolerance in comparison to some invasive bivalve species, but methods by which organismal tolerance is achieved are not well understood. This study was designed to compare the behavioral and physiological responses of the native Lampsilis ovata to that of the invasive Corbicula fluminea. Lampsilis were found to exhibit strong behavioral avoidance to salinity exposure, whereas Corbicula displayed very weak avoidance to comparable salinity concentrations followed by indications of osmotic conformation through physiological mechanisms. Prolonged valve …

Environmental Cybernetics: Technology And The Perception Of Remediated Space, Lucas Gentry

Electronic Theses and Dissertations

Moby Dick, House of Leaves, and Ex Machina portray characters that rely on a form of technology to navigate their respective environments. As such, their settings are remediated spaces – spaces understood through their relationship with technology. The inhabitants of remediated spaces inherently resemble the cyborg as their perspectives fuse with machines in their understanding of space. Captain Ahab from Moby Dick must rely on his ivory leg and ship for mobility, often merging himself with the machine of the vessel. House of Leaves provides a space and family that exist exclusively within the confines of found footage, …

Alkylation Of Benzene On Immobilized Phosphotungstic Acid, Kofi Kankam

Electronic Theses and Dissertations

Linear alkylbenzenes (LAB) are key intermediates in the synthesis of linear alkylbenzene sulfonate surfactants that are used in the manufacture of detergents. Production of LAB with traditional Lewis acids as catalysts, such as hydrofluoric acid, results in the formation of large amounts of toxic wastes and corrosion of industrial equipment. Phosphotungstic acid (PTA) has gained much attention in recent years as a solid catalyst for various alkylation reactions. This research work aims to develop a novel material based on PTA-containing silica gel, which can effectively catalyze LAB synthesis. Sol-gel synthesis of silica gel in the presence of PTA and tetraethyl …

A Qualitative Analysis Of End-Of-Life Healthcare In Tennessee: Politics, Principles, And Perceptions, Erin Mauck

Electronic Theses and Dissertations

The unprecedented growth of the aging population in Tennessee is a significant demographic trend that highlights the necessity for healthcare policy that tackles end-of-life issues. This study examined the perceived quality of end-of-life healthcare in Tennessee, areas that are in need of improvement, policies that have the potential to influence improvements, and the role of politics in end-of-life healthcare policy. It also assessed the support for end-of-life healthcare policy that would advance quality of care and expand end-of-life choices for Tennesseans, while evaluating the policy-making process that legislators employ.

For this study, data were collected using semi-structured, in-depth interviews with …

Past, Current, And Future Potential Distributions Of Red Spruce And Fraser Fir Forests In The Southern Appalachians: Interpreting Possible Impacts Of Climate Change, Danika Mosher

Electronic Theses and Dissertations

Spruce-Fir forests are relicts from the Pleistocene and can only be found within the Southern Appalachians. Analyzing the relationships between species distribution, climatic parameters, topography, and biotic interactions through ecological niche modeling creates prediction maps for conservation efforts. Maxent, Boosted Regression, and Random Forest were utilized to compare which model and variable combinations best approximate the unique mountain forest environment. Maxent with a bias file produced optimal results and was used to examine distributional changes that may occur in the future and how these changes compare to paleo-environmental distributions. Fraser fir has shown evidence of being influenced by changing climates …

Policing Farm Crime: An Exploratory Study Of Agricultural Crime Units, Brianna Lynn

Electronic Theses and Dissertations

The purpose of this study was to explore the practices, perceptions, and operations of agricultural crime units. To date, there has been little research conducted on policing agricultural crimes and no known research on units specializing in investigating them. The study utilizes data gathered from qualitative interviews with agricultural crime investigators across several states to fill this gap in the literature. The results allow for an examination of the fundamental practices of agricultural units, their perceptions and their experiences. In addition, they point to several implications for both policy and practice that may serve to guide our efforts to combat …

The Resilience Of Female Survivors Of Intimate Partner Violence In Southwest Nigeria: An Interdisciplinary Analysis, Tobi F. Oloyede

Electronic Theses and Dissertations

Female survivors of intimate partner violence (IPV) in Nigeria endure harsh and traumatic experiences that affect their rights as women and their well-being. As the phenomenon of IPV persists in Nigeria, it is not only a family problem but a critical social and psychological problem. This study examined Nigerian female survivors’ hidden strength, agency, and resilience, rather than their powerlessness and vulnerability. Analysis of survey questionnaires, interviews, and secondary scholarship reveals that some Nigerian female survivors of IPV are able to cope whilst navigating stressful and traumatic experiences. The results also show that survivors’ ability to thrive and cope under …

The Lived Experience Of Obesity, Spirituality, And Health Behaviors In African American Women, Andrea S. Poynter

Electronic Theses and Dissertations

Obesity is one of the fastest-growing health concerns impacting all racial, ethnic, gender, and socioeconomic groups in the United States of America. More than one-third of the U.S. adult population is classified as being obese (Obesity Society, 2014). Novak and Brownell (2012) identified that “obesity rates are consistently rising higher each year than in previous years” (p. 2345). Obesity has reached epidemic proportions in all races and genders within the US with African American women comprising a majority of those impacted by this chronic health condition. Obesity rates are well documented within the literature but what is lacking is the …

Kids These Days: Corporate Social Responsibility And Generational Influence On Consumer Intention, Maya Mathis

Electronic Theses and Dissertations

Millennials are known for being a unique generation that places a high value on improving their community. They are also unlike any other generation because they are harder to market to since they are more aware of common marketing strategies used by companies today. Millennials want to improve the community and expect others to do the same. Corporate Social Responsibility (CSR) is a popular topic and has gained momentum in research over the years; understanding the relationship between CSR and millennials is important due to the generational shifts. Therefore, this study examines the importance of CSR to different generations and …

Students’ Meaning-Making Journeys Towards Self-Authorship Through Self-Designed Gap Year Experiences, Erin Garcia

Electronic Theses and Dissertations

This phenomenological, qualitative study addressed student perceptions of their meaning-making process towards self-authorship in a self-designed gap year experience and was conducted in a public higher educational institution in the Southeast. Data was gathered through interviews from a purposeful sample of gap year program participants and program administrators. Emerging themes and categories were identified by coding and analyzing the interview data, such as continual reflection reinforces the value of individual meaning-making, self-expectations versus self-worth, the influence of societal expectations are minimized, and self-designed learning helps to solidify changes in self-authorship. The data showed a strong connection between multiple meaning-making contexts …

Teacher Retention In Secure Residential Settings, Daniel Froemel

Electronic Theses and Dissertations

A phenomenological study was conducted to identify the factors associated with job retention among teachers in secure residential treatment centers in Tennessee. Central to this investigation was the exploration of how residential teachers perceive they are supported in their position, how teachers in residential settings perceive the culture of the facility, and what factors are associated with teacher retention in secure residential settings. Through a series of fifteen interviews, common themes emerged from the coding that provided insight into these questions.

Teachers who had worked in residential settings for more than five years seemed to have very strong internal belief …

Safety In The Educational Environment: Rural District Administrator Perceptions Of School Safety In Northeast Tennessee Public Schools, Richard A. True

Electronic Theses and Dissertations

A qualitative research study was conducted to identify, describe, and understand the perceptions of administrators of public school districts in northeast Tennessee regarding school safety. Using a semi-structured interview process, the researcher identified emerging themes regarding the factors most associated with safe school districts, the factors most associated with unsafe school districts, the items identified as needed to improve safety, and the topics identified as future safety issues at the school and district level. Through such study, the researcher was able to develop an understanding regarding the overall safety of school districts in northeast Tennessee and the specific components that …

“Fetch M’Dear”: Healers, Midwives, Witches, And Conjuring Women In Select Ya And Toni Morrison Novels, Diane Mallett-Birkitt

Electronic Theses and Dissertations

Accusations and persecution of witchcraft have been embedded in global culture for centuries. For as long as these persecutions have occurred, women have found themselves accused most frequently. Older women with herbal knowledge were often called on to assist with childbirth or termination of pregnancies and this “secret knowledge” often led them to be suspected of supernatural abilities, often of a satanic nature. Intrigued by these wise women who appeared to have mysterious powers and a penchant for arousing the ire of men in the legal, medical, and religious communities, I began to notice their frequent appearance in novels. Does …

Prevention Of Chronic Inflammation By Targeting Macrophage Integrin Adb2, Cady Forgey

Electronic Theses and Dissertations

Macrophage integrin a_Db₂ promotes macrophage retention and accumulation within inflamed tissue, a key event in development of chronic inflammation. Recently, the P5 peptide was identified as a specific inhibitor for integrin a_Db₂ interaction with 2-(ω-carboxyethyl) pyrole (CEP), a ligand at inflammatory sites. This thesis aims to identify integrin a_D I-domain amino acids involved in binding P5 peptide and likewise to CEP. We propose that non-conserved, basic amino acids of the integrin a_Db₂ I-domain are responsible for binding to P5 peptide and likewise to CEP. Eight amino acids were analyzed by …

Mapping A Course To Success: The Relationship Of A College To Career Navigation Exploratory Course To Academic Success, Patrick D U Davis Sr

Electronic Theses and Dissertations

The purpose of this quantitative, comparative study was to determine the relationship between retention and academic success of students who participated in a College to Career Navigation exploration course and students who did not participate in the course at a rural, community college serving a 14-county area in the Southeast U. S.

Archival data were collected from the participating community college’s student information system. Other data examined for this study included the student’s gender, at-risk status, and age. Retention data of the first-year, full-time students were collected and measured in accordance with the enrollment requirements of the community college’s governing …

Veteran Teachers’ Perceptions On The Negative Implications Of Classroom Disruptive Behavior And Redirection Strategies, Charvelia Sharae Lewis

Electronic Theses and Dissertations

Classroom teachers are responsible for creating an environment where all students are able to receive an optimal educational experience. However, disruptive behavior demonstrated by students in classrooms often makes it more difficult for teachers to provide quality instruction to all students. The purpose of this qualitative case study was to understand the perceptions of veteran teachers related to student disruptive behavior as well as the redirection strategies utilized to decrease the occurrence of such behavior during instructional time. Along with completing an open-ended survey related to strategies used to address disruptive behavior, the veteran teacher participants shared their experiences in …