Digital Commons Network^™

Machine Learning Approaches For Lung Cancer Diagnosis., Ahmed Mahmoud Ahmed Shaffie

Electronic Theses and Dissertations

The enormity of changes and development in the field of medical imaging technology is hard to fathom, as it does not just represent the technique and process of constructing visual representations of the body from inside for medical analysis and to reveal the internal structure of different organs under the skin, but also it provides a noninvasive way for diagnosis of various disease and suggest an efficient ways to treat them. While data surrounding all of our lives are stored and collected to be ready for analysis by data scientists, medical images are considered a rich source that could provide …

Restaurant Style Prediction Using Word2vec And Support Vector Machine., Saleh Abdullah Almohaimeed

Electronic Theses and Dissertations

Natural Language Processing represents a quantum leap for governance and industries. It enables them to have an insight into hidden patterns and information within their data. In this thesis, we have worked on an important field in Natural Language Processing, which is Text Classification. Our goal is to help restaurant owners to find which dishes customers like more. To do that we have used a dataset from Yelp.com that has 150,000 restaurant reviews, then count the most frequent dishes mentioned. However, this way is not effective except if these reviews are categorized into different restaurants-styles. For this reason, we have …

Distribution And Ecological Effects Of Azteca Chartifex/Trigona In The Barro Colorado Nature Monument., Rachel Leann Wells

Electronic Theses and Dissertations

This dissertation explores the behavior and ecology of a conspicuous and behaviorally dominant ant species in the tropical rainforest of Panama. Competition with aggressive species is an important factor that shapes local community structure. Eavesdropping on the chemical communication systems of such behaviorally dominant species can help heterospecific species to avoid negative interactions. I review the chemical communication system and known ecological effects of the Neotropical canopy ant, Azteca chartifex/trigona (Chapter 1). There are over 40 known compounds produced by Azteca workers, yet how these compounds impact heterospecific species is unclear in many circumstances. I assessed if heterospecific …

From Deficit To Strength: The Educational Influence Of Single Black Mothers On Their Sons’ Academic Achievement, Tyre’ D’Vallion Jenkins

Electronic Theses and Dissertations

The purpose of this study was to examine the lived experience of single Black mothers’ in supporting their sons’ academic achievement and to better understand their overall success. Historically, research that has been conducted on single Black mothers is viewed from a deficit lens (Copeland, 1977; Grier & Cobbs, 1968; Karon, 1958; Moynihan, 1965; Pettigrew, 1964). The role of single Black mothers has been grossly misunderstood, insinuating that they would be economically poor, uneducated, and lacked effective parenting skills. This study incorporated phenomenological and narrative methodologies, such as semi-structured interviews, focus groups, and observational field notes to capture the participants’ …

K-12 Economically Disadvantaged Students, Poverty, And Education: Ecological Narratives Of Successful Raised-In-Poverty, Texas Educators, Rebecca N. Morris

Electronic Theses and Dissertations

This research study aimed to understand how successful Texas educators who grew up in poverty understood and improved the educational experience of economically disadvantaged students. This study utilized a structural ecological theory and three theories of social relationships (Social Identity, Standpoint, and Cultural Capital). This phenomenological and qualitative study used a cross-sectional, descriptive, online case study design rooted in narrative nonfiction. Virtual interviews with six successful Texas educators that grew up in poverty were conducted. A narrative method of analysis was utilized to generate codes then organize them into themes, and to construct and compare the narrative findings. The results …

“It Could Have Happened To Any Of You”: Post-Wounded Women In Three Contemporary Feminist Dystopian Novels, Abby N. Lewis

Electronic Theses and Dissertations

My goal for this thesis is to investigate the concept of (mis)labeling female protagonists in contemporary British fiction as mentally ill—historically labeled as madness—when subjected to traumatic events. The female protagonists in two novels by Sophie Mackintosh, The Water Cure (2018) and Blue Ticket (2020), and Jenni Fagan’s 2012 novel The Panopticon, are raised in environments steeped in trauma and strict, hegemonic structures that actively work to control and mold their identities. In The Panopticon, this system is called “the experiment”; in The Water Cure, it is personified by the character King and those who follow him; …

Investigating The Role Of Charge Separation In Triplet State Formation In Zinc Dipyrrin Photosensitizers, Irene Y. Dzaye

Electronic Theses and Dissertations

About 85% of the world’s energy is derived from non-renewable sources—coal, petroleum, and natural gas. Solar photocatalysis is one way to potentially generate cheap renewable fuels by harnessing energy from the sun using a photosensitizer and converting it into chemical energy. The efficiency of a photosensitizer depends on its capacity to form a prolonged triplet excited state. Zinc dipyrrin complexes have the potential to be efficient sensitizers for reductive photochemistry, but their ability to form long-lived triplet excited states still needs extensive research. The overall aim of this research is to probe the role charge separation plays in the formation …

Image Analysis Of Charged Bimodal Colloidal Systems In Microgravity., Adam J. Cecil

Electronic Theses and Dissertations

Colloids are suspensions of two or more phases and have been topics of research for advanced, tunable materials for decades. Stabilization of colloids is typically attributed to thermodynamic mechanisms; however, recent studies have identified transport or entropic mechanisms that can potentially stabilize a thermodynamically unstable colloidal system. In this study, suspensions of silsesquioxane microparticles and zirconia nanoparticles were dispersed in a nitric acid solution and allowed to aggregate for 8-12 days in microgravity aboard the International Space Station. The suspensions were subsequently imaged periodically at 2.5x magnification. Due to the inadequacy of existing image analysis programs, the python package “Colloidspy” …

Improving Student Success And Engagement In Virtual And Hybrid Classrooms., Sydney Fogo

Electronic Theses and Dissertations

The following thesis examines virtual classes from the University of Louisville in the Fall 2020 semester to discover points of weakness relative to keeping students engaged in online courses. Three surveys were taken by a select group of participants over the course of the fall semester in order to collect student opinion on specific classes. Interviews were held with a subset of students from the group of participants and also with professors who taught the study’s participants in the fall of 2020. Their responses and conversations were used to determine possible areas of improvement for virtual classes. This information was …

Religiosity, Outgroup Contact, Postconventional Religious Reasoning, And Their Associations With Christians' Prejudice Against Sexual And Gender Minorities., Lucas Huckaby

Electronic Theses and Dissertations

Over the last few decades there has been a resurgence of work investigating topics around religion and spirituality (R/S), with the majority of the literature demonstrating associations with positive outcome variables. However, R/S factors have also shown significant relationships with some negative outcomes, most notably prejudice towards sexual and gender minorities (SGM). Following the call of researchers, this study investigates the hypothesized positive relationship between postconventional religious reasoning (PRR), defined as an individual’s ability to engage in critical thinking around R/S ideas while also demonstrating increased perspective-taking, along with other known covariates of prejudice against SGM (religiosity, outgroup contact) to …

Annealing Of Encapsulated Heavy Metals From Brine Water Utilizing Microwave Enabled Sol-Gel Process, Adam Michael Flynn

Electronic Theses and Dissertations

Various waste encapsulation strategies have been investigated to solidify and stabilize heavy metal wastewater for proper long-term storage. This work aims to enhance a method of novel sol-gel encapsulation of heavy metals from mock brine waters using tetramethyl orthosilicate with the addition of an annealing step at various temperatures in order to reduce leaching of metals from the silica monoliths when exposed to water. The metals tested for encapsulation and leaching were mercury (II) chloride, potassium dichromate, sodium selenite, boric acid, cadmium chloride, and copper (II) acetate. The annealing of the silica monoliths led to an increased degree of for …

A Qualitative Investigation Into The Trauma Exhibited By First Responders Tackling The Opioid Epidemic In Tennessee, Thalia Sullivan

Electronic Theses and Dissertations

Recent increases in opioid overdose rates have changed the role of first responders on the front lines of this national crisis. The present study used a semi-structured qualitative interview to investigate how the increase in opioids, opioid-related harm, and opioid-related death within Tennessee has affected the first responder population. Law enforcement officers, firefighters, and paramedics (N = 30) from rural-serving counties in Tennessee completed a semi-structured interview. Eight themes emerged from the interviews: (1) mental health symptoms, including posttraumatic stress disorder and secondary traumatic stress symptoms; (2) coping behaviors; (3) available resources; (4) barriers to accessing resources; (5) recommendations …

Identity-Specific Positive Psychology Intervention For Sexual Minorities: A Randomized Control Trial, Sarah Job

Electronic Theses and Dissertations

Sexual minorities experience mental and physical health disparities in comparison to heterosexual individuals due to minority stress (Branstrom et al., 2016; Kerridge et al., 2017; Meyer, 2003). Positive psychology interventions have improved mental and physical health (Antoine et al., 2018; Lambert D'raven et al., 2015), and therefore these interventions have potential to address health disparities. The current study tested an identity-specific intervention (n = 30) to a general positive psychology intervention (n = 30) and a control group (n = 30) among sexual minorities. This built on a recent pilot study which tested the efficacy of an …

Intuition Of An Outsider: From Nothing To Voice In George Scarbrough’S Poetry, William Moore

Electronic Theses and Dissertations

Long acknowledged as a committed poet of place, this thesis examines tones of outsiderness and alienation that characterize George Scarbrough’s poetry. Scarbrough draws on familiarity with his childhood in southeast Tennessee, and from an outsider’s outlook, a perspective veritably prompted by the rejection he suffered as a homosexual and lover of language, Scarbrough’s poetry addresses the daunting themes of fear and nothingness. Analysis of his poetry also reveals qualities of hope and endurance, a commitment to received forms, and Modern innovation. Through his poetic voice, culminating in the alter ego of Han-shan, Scarbrough provides vital insights into the human experience.

Barriers To Succession Planning: A Case Study Of Atlanta Nonprofit Organizations, Adonnis J. Jules

Electronic Theses and Dissertations

Succession planning is not a common practice among nonprofit organizations, despite support for its effectiveness in supporting leadership development and providing organizational stability during a planned or unplanned transition. Nonprofits have acknowledged that their leadership ranks are thin, and a leadership transition tends to bring challenges to the organizations when vacancies need to be filled. Barriers exist that prevent nonprofits from engaging in succession planning, but little research has examined the nature of these barriers. This study focused on nonprofit organizations across four different industry sectors to determine the extent of their succession planning efforts and the barriers that exist …

Determination Of Causal Relationship For Increasing Nurse Burnout: A Correlational Analysis, Ashley K. Moore

Electronic Theses and Dissertations

Nursing leaders continue to face issues related to nurse satisfaction and retention. Burnout, exhaustion, and low motivation have a direct impact on the care nurses provide. There are many economic and non-economic factors affecting nursing morale, motivation, and productivity. This employer’s All Employee Survey for 2017 and 2018 showed a significant increase in nurse reported fatigue, exhaustion, low engagement, and burnout scores over a 12-month period. Based on general systems theory, this project utilized secondary data from the survey to perform a correlational analysis to identify whether supervisor relationships, workplace characteristics, and workgroup characteristics were related to burnout, exhaustion, and …

Faculty Of Color Viewpoints Regarding Recruitment, Retention, And Academic Climate At Texas Community Colleges, Caitlin Alexa Graves

Electronic Theses and Dissertations

The recruitment and retention of faculty of color is a critical issue within higher education institutions, however, the research is lacking within community colleges. Community colleges enroll over half of all non-White students in higher education, more than any other type of higher education institution; however, the faculty do not reflect the student population. Faculty of color face potential suppression, omission, isolation, and lack of belonging. This study illuminated faculty of color’s experience at community colleges and the culture at community college for these faculty. In this qualitative, interpretative phenomenological study, the researcher explored the viewpoints of faculty of color …

The Reciprocity Of Mentorship: Impacting Christian Higher Education, Alessandra Brohmer Hansen

Electronic Theses and Dissertations

The purpose of this interpretive phenomenological analysis was to explore the lived experiences of students and faculty engaged in mutually beneficial mentoring relationships at Christian universities. A dearth of current research focused on the experiences of emerging adults and on the benefits to mentors in a Christian context prompted this inquiry. Semi-structured interviews were completed virtually with two mentor-mentee dyads, while data analysis included use of qualitative research software as well as original phenomenological reduction and interpretation. Findings provided insights not only into the meaning student mentees ascribed to mentoring but also into the perceptions of faculty mentors. Despite different …

Teachers' Perspectives Of Restorative Disciplinary Practices, Asma Anwar

Electronic Theses and Dissertations

In this phenomenological qualitative study, the perceptions of middle school teachers regarding the implementation of restorative practices with their students with disabilities were examined. Exclusionary suspensions have been overwhelmingly employed to handle student discipline, and students with disabilities experience these harsh punishments at higher rates than their general education peers. However, an increasing number of school districts have started to utilize alternative therapeutic methods, such as restorative practices, to handle conflict and build relationships. The researcher’s goal was to understand better the lived experiences of teachers when implementing these practices and understand the challenges they faced while building connections with …

Case Study: Teacher Mindset And Its Impact On Instruction In An At-Risk Classroom, Michelle L. Rice

Electronic Theses and Dissertations

The achievement gap between disadvantaged students and their advantaged peers is a problem that has been a concern since the Brown vs. the Board of Education Supreme Court case in 1954. The problem continues to exist, and little progress has been made in closing the gap. Research shows a teacher’s mindset can significantly impact the achievement gap. This mixed-methods case study aims to examine teacher mindsets in at-risk, suburban elementary campuses to determine its impact on instruction. A purposeful selection sample of nine teachers from various levels, experience, and specialties in grades PK-5 took part in the study. The quantitative …

Teacher Mentorship Program’S Influence On Novice Teachers’ Decision To Stay: A Case Study, Joan Evans Otten

Electronic Theses and Dissertations

Public schools are faced with dealing with high teacher turnover and low job satisfaction indicators, particularly from novice teachers in their first 5 years of service. To combat the problem, schools have designed and developed a variety of mentorship programs aimed at providing support for the novice teachers and thereby increasing job satisfaction. The purpose of this qualitative case study program evaluation was to examine a specific school district’s current mentorship program in order to determine how participation in the program influences new teachers’ decision to leave the school district. Using the narratives from interviews and surveys, the researcher examined …

Perceived Neighborhood Characteristics And Cognitive Function Among Older Adults: Examining The Role Of Depression, Allison Sullivan, Mph

Electronic Theses and Dissertations

Purpose: African American older adults have a greater risk of cognitive impairment compared to White older adults. While some research has established that neighborhoods are an important determinant of health, relatively little research has examined the relationship between perceived neighborhood characteristics and cognitive functioning among older adults. Moreover, little is known about how depression is implicated in the relationship between perceived neighborhood characteristics and cognitive functioning, and if racial differences exist. Thus, this thesis aims to determine the mediating and moderating role of depression in the association between perceived neighborhood characteristics and cognitive functioning in older African American and White …

Leadership In Disciplinary Alternative Education Programs And The School To Prison Pipeline, April Michele Smith

Electronic Theses and Dissertations

Current research about the school to prison pipeline has focused on the impact of zero-tolerance policies in public education on historically marginalized student populations, especially school exclusionary practices of minority and learning-disabled students. This transcendental phenomenological study extended the understanding of disciplinary alternative education programs’ place in the school to prison pipeline trajectory. According to critical race and social justice leadership theories, the investigation and exposure of the public education components leading students into the school to prison pipeline are violations of student civil rights that require scrutiny and actionable public education reform focused on equity and inclusion.The purpose of …

Understanding And Avoiding Ai Failures: A Practical Guide., Robert Max C Williams

Electronic Theses and Dissertations

As AI technologies increase in capability and ubiquity, AI accidents are becoming more common. Based on normal accident theory, high reliability theory, and open systems theory, we create a framework for understanding the risks associated with AI applications. In addition, we also use AI safety principles to quantify the unique risks of increased intelligence and human-like qualities in AI. Together, these two fields give a more complete picture of the risks of contemporary AI. By focusing on system properties near accidents instead of seeking a root cause of accidents, we identify where attention should be paid to safety for current …

Fizzing Out: A Correlational Study Of Burnout And Worklife Perceptions Among Student Affairs Professionals In The Mid-Atlantic Northeast Region Of The United States, Ashante Connor

Electronic Theses and Dissertations

The purpose of this dissertation was to examine level of burnout and the employee perceptions among student affairs professionals (SAPs) in the Mid-Atlantic Northeast Region of the United States. The Maslach Burnout Inventory (MBI) and the Areas of Worklife Survey (AWS) collectively known as the Maslach Burnout Toolkit was electronically completed by 323 student affairs professionals at institutions located in the Mid-Atlantic region of the United States. The research designs utilized demographic and inferential statistics including Pearson Product Moment correlations. The response rate was high enough to make statistically significant associations. The scores obtained from the MBI and AWS subscales …

A Case Study Of One Small Christian College Overcoming Decline And Implementing An Institutional Turnaround, Richard H. Johnson

Electronic Theses and Dissertations

Numerous studies and national data show a growing number of small, private, Christian colleges face extreme difficulties, which often result in decline, followed by closure or merging with larger, higher education institutions. Attempting to overcome the loss of student revenue from a declining enrollment, many small colleges raise tuition prices, spend endowment funds, and overextend themselves with high debt payments. Countering the increased tuition prices, these colleges often increase scholarships and financial aid, which reduces available funds for other institutional needs. Other challenging issues include meeting accreditation standards, raising money for operational and capital needs, and the general public losing …

A Qualitative Case Study Of A Transitional Program For Students In Middle School As They Transition To High School, Patrick Tremayne Moore

Electronic Theses and Dissertations

Every school year, many U.S. students prepare to make the transition from being a middle school student to becoming a high school student. School transitions happen regularly and can be considered predictable. As students transition to high school, there are more challenges such as school work and peer influence. The purpose of this qualitative case study was to explore the perceptions of students who participate in a transition program as they transition from middle school to high school. Also, this study explored the perceptions of teachers who participated in the transition programs. The population of this study consisted of students …

The Relationship Between Career And Technical Education Enrollment And College And Career Readiness Outcomes, Daniel Soliz Jr.

Electronic Theses and Dissertations

College and career readiness for K-12 students has become a priority of legislatures and educational leaders in the United States. In recent years, Texas public school leaders have emphasized the importance of maximizing the percentage of College, Career and Military Ready (CCMR) graduates. The specific problem studied was that a low percentage of students in Texas, in comparison to the state’s graduation rate, graduate with a CCMR distinction. Career and Technical Education (CTE), a component of K-12 education, can assist school leaders in maximizing college and career readiness for students. However, it was not clear how within schools, CTE enrollment …

Implementing Culturally Diverse Strategies In Higher Education Classrooms, Christina M. Corona

Electronic Theses and Dissertations

Abstract

In this qualitative case study, the researcher determined how student cultural differences influenced Western Coastal University (WCU, pseudonym) faculty pedagogies within their courses. Additionally, the researcher clarified how WCU faculty described their understanding and awareness of culturally diverse teaching strategies. Further investigation also uncovered what successes and challenges professors faced when implementing culturally diverse strategies in the classroom and what differences they discovered in their teaching and student learning as a result. The researcher used in-depth interviews, artifact documents such as the WCU’s Diversity Rationale Statement and Strategic Plan, and course survey data. Three overarching themes emerged from the …

An Analysis Of The Child Find Provision Due Process Hearings In Texas: Implications From The Special Education Cap, Katherine Hall Crites

Electronic Theses and Dissertations

This legal qualitative content analysis described how special education due process hearing officers applied the Individuals with Disabilities Education Improvement Act (IDEIA) child find provision since the 2016 federal citations. The study found that districts often violated child find by not evaluating each disability condition, either known or previously suspected. The hearing officer decisions were most often focused on: (a) timely referral and evaluation, (b) comprehensive evaluation, and (c) having a reason to suspect that the student has a disability in need of special education. The decisions were represented as: (a) issues held for the prevailing party, (b) child find …