Digital Commons Network^™

Dental Morphology In A Juvenile Mammal From The Late Cretaceous Of South America: Tooth Eruption And Development., Kayla E Newton

Electronic Theses and Dissertations

Meridiolestids are a diverse and distinct clade of Cretaceous–Miocene South American dryolestoid mammals ranging in size from small shrew-sized insectivores to large dog- sized omnivores. Cronopio dentiacutus from the Cenomanian La Buitrera locality, Rio Negro Province, Argentina (Candeleros Fm.) is the oldest and best known of them, represented by skull material and associated jaws. A juvenile skull as attributed to Cronopio dentiacutus, based on tooth size and morphology, was collected from the type locality. The specimen includes the skull and both articulated lower jaws. The fossil is poorly ossified and partially flattened; CT scanning reveals most of the dentition …

Release Kinetics Of Metronidazole From 3d Printed Silicone Scaffolds., Sydney E. Herold

Electronic Theses and Dissertations

Sustained local administration of active agents has been proposed to cure bacterial vaginosis in the female reproductive tract and restore the resident bacterial fauna. Bioprinting has shown promise for the development of systems for local agent delivery. In contrast to oral ingestion, agent release kinetics can be fine-tuned by bioprinting specialized scaffold designs tailored for particular treatments while enhancing dosage effectiveness via localized sustained release. It has been challenging to establish scaffold properties for sustained release as a function of fabrication parameters. Towards this goal, we evaluate 3D printed scaffold formulation and feasibility to sustain release of metronidazole, a representative …

Gen Z Students’ Experiences With College Choice, Heather Levesque

Electronic Theses and Dissertations

The purpose of this qualitative study was to explore what influences Gen Z student college choice. Research on college choice has provided insight into whether or not a student will attend college; however, limited research exists on what impacts Gen Z students’ college choice and how marketing and communication influence what college a student will choose. College recruitment has always been challenging, given the high competition between colleges and universities. With the decrease in enrollment over the last decade and the unexpected impact of COVID-19, that challenge continues to grow. Enrollment and marketing administrators have difficulty expanding and diversifying their …

Risk Gameplay Analysis Using Stochastic Beam Search, Jacob Gillenwater

Electronic Theses and Dissertations

Hasbro’s RISK, first published in 1959, is a complex multiplayer strategy game that has received little attention from the scientific community. Training artificial intelligence (AI) agents using stochastic beam search gives insight into effective strategy when playing RISK. A comprehensive analysis of the systems of play challenges preconceptions about good strategy in some areas of the game while reinforcing those preconceptions in others. This study applies stochastic beam search to discover optimal strategies in RISK. Results of the search show both support for and challenges to traditionally held positions about RISK gameplay. While stochastic beam search competently investigates gameplay on …

The Impact Of Sea-Level Rise In Numerically Modeled Landfalling Hurricanes: Katrina And The Gulf Coast., Serenity Nadirah Mercuri

Electronic Theses and Dissertations

With climate change, landfalling hurricanes become an increasing threat to coastal regions. However, the interactions between the coastal landscape and landfalling hurricanes are often overlooked when addressing sea-level rise outside of inundation and independent of sea surface temperature. This study analyzed the potential impacts regarding structure and intensity as a result of sea-level rise in the Gulf of Mexico using the WRF-ARW numerical model coupled with a 1D ocean model. Analysis showed that 10 m windspeed from landfall forward was higher in modified coastlines, and minimum sea-level pressure post-landfall was consistently lower for modified runs where storms maintain a higher …

Relationships Between Dual Enrollment Parameters, College Completion, And Time To Completion At Tennessee Community Colleges, Victoria N. Mellons

Electronic Theses and Dissertations

The purpose of this non-experimental quantitative study was to evaluate the relationships between completion of high school dual enrollment courses and subsequent success of first-time, full-time community college students as measured by completion of an associate degree and the time it took to complete the degree. In addition to comparing dual and non-dual enrollment student performance, the effects of the number of dual enrollment courses completed and the subject areas of those courses was evaluated. Student subgroups reviewed included gender, race, socioeconomic status, and prior academic preparation (ACT score). The focus of this study was all first-time, full-time students at …

A Machine Learning Approach For Reconnaissance Detection To Enhance Network Security, Rachel Bakaletz

Electronic Theses and Dissertations

Before cyber-crime can happen, attackers must research the targeted organization to collect vital information about the target and pave the way for the subsequent attack phases. This cyber-attack phase is called reconnaissance or enumeration. This malicious phase allows attackers to discover information about a target to be leveraged and used in an exploit. Information such as the version of the operating system and installed applications, open ports can be detected using various tools during the reconnaissance phase. By knowing such information cyber attackers can exploit vulnerabilities that are often unique to a specific version.

In this work, we develop an …

Dental Students' Perceptions Of Dental Hygienists' Education And Scope Of Practice, Cynthia Metzger

Electronic Theses and Dissertations

Oral health is strongly correlated to systemic health in the United States. Dental professionals play a significant role in addressing the oral health and prevention of disease for populations in the United States. Because many areas in the United States lack access to dental care, the federal government considers dental hygienists part of the solution. It is now paying attention to restrictive dental hygiene scope of practice rules in each state. State dental boards, comprised mainly of dentists, make these rules based on their perception of dental hygienists' lack of education. This study explored fourth-year dental students' perceptions of the …

Examining Diversity And The Role And Influence Of Post-Secondary Faculty At A Predominantly White Institution In Tennessee: A Critical Race Case Analysis, Lanell Smith

Electronic Theses and Dissertations

The purpose of this qualitative, critical race analysis study is to explore how White faculty conceptualize and apply critical race theory (CRT) and culturally responsive pedagogy (CRP) to curricula within a college of education and how the perceptions of their students’ identities influence specific pedagogical decisions. The researcher sought to extend the research on CRT in education by analyzing specific, detailed cases and incorporating purposeful sampling by selecting participants who match specific study criteria, i.e. graduate-level White faculty located in Tennessee who teach in programs of education.

This study was limited to six faculty in a college of education (in …

Virginia High Schools: Academic And Social Climate Performance Measures And Black Public Secondary School Administrators, Tim Duncan

Electronic Theses and Dissertations

Data have consistently revealed a major problem with disproportionality in several academic and social climate measures for African American students compared to their White counterparts. Black students tend to have lower end-of-course (EOC) testing scores in mathematics and reading, a greater tendency to be suspended from school, lower average on-time graduation rates, and higher rates of absenteeism. The current investigative study examined the role of same race administrators and performance indicators among African American students.

The findings demonstrated that significant differences between Black and White students existed in end-of-course testing in reading and math. The research also indicated significant relationships …

Examining How Black Administrator Employment Decisions Are Impacted By The Behaviors Of Supervisors, Annie Wilson Whitaker

Electronic Theses and Dissertations

The purpose of this phenomenological study was to understand how Black, public school administrator employment decisions are impacted by the behaviors of supervisors in Virginia. Commonalities among the lived experiences of Black, public school administrators were examined in order to identify specific behaviors which impact employment decisions.

Transcendental phenomenological qualitative research design was utilized. Participants were identified through gatekeeper introductions and then narrowed through snow-ball sampling. Data was collected through open-ended face-to-face interviews with 12 Black, public school administrators in Virginia via a secure online platform. The data was analyzed in order to identify emergent themes which represent the lived …

Posthumanism In The Early Modern Period: Jonson, Marlowe, And Shakespeare, Kayli Compton

Electronic Theses and Dissertations

This thesis examines the existence of posthumanism in the dramas of Ben Jonson, Christopher Marlowe, and William Shakespeare – the three most prominent playwrights of the early modern period. Posthumanist theory, which gives scholars the opportunity to look at past works in a new and unique way, attempts to re-locate the human in the diverse creatures and objects in the world we inhabit. By applying posthumanist theory to older works, we can better understand the early modern period and its writers as well as their relevance to the present. Their plays’ messages serve as warnings that work to guide humanity …

Academic Performance Among First-Year College Freshmen Following Participation In A Summer Bridge Program, Gregory Anderson Cross

Electronic Theses and Dissertations

The primary purpose of this study was to determine the differences in the academic outcomes of first-year academically underprepared TN Promise-eligible college freshmen who participated in a college bridge program. A comparative research design was applied to existing data, including first-semester GPA, first-semester credit completion rate, first college-level mathematics course GPA, first college-level English course GPA, and fall-to-fall persistence rates. A random sample of 412 first-time freshman college students from five cohorts was analyzed using descriptive statistics for eight research questions. These findings indicated that there were no significant differences among college bridge participants and non-bridge participants. Non-bridge program participants …

Searching For Hades In Archaic Greek Literature, Daniel Stoll

Electronic Theses and Dissertations

No single volume of mythological or philological research exists for Hades. In the one moment Hades appears in archaic Greek literature, speaking for only ten lines, Hermes stands nearby. Thus, to understand and journey to Hades is to reckon with Hermes’ close presence. As I synthesize research by writers from several different disciplines, may some light be brought into the depths. May we analyze Hades’ brief appearance in archaic Greek literature, examining how what I define as the “Hermetic” emits from his breath in the one moment he physically appears and speaks.

Community Structure Analysis Of Mammals Found At The Gray Fossil Site, Tn, Sarah Clark

Electronic Theses and Dissertations

The early Pliocene Gray Fossil Site (GFS) is a biodiverse site with a unique faunal assemblage that represents one of few sites of its age in eastern North America. A community structure analysis of the mammals at GFS was done to characterize species and better understand the paleoenvironment. Data and was gathered from twenty modern communities and five late Neogene sites to compare with GFS. Species from these 26 sites were categorized by body size, locomotor mode, cheek tooth crown height, and diet to characterize niches occupied. Descriptive statistics contrasted proportions of species within categories across communities. Discriminant function analyses …

The Impact Of An Integrated Stem Collaborative Approach On Preservice Teachers’ Pedagogical Content Knowledge And Curricular Role Identity For Teaching Science, Qiuju Tian

Electronic Theses and Dissertations

The current study investigated the impact of an integrated STEM collaborative approach embedded in a science methods course on early childhood and elementary preservice teachers’ pedagogical content knowledge (PCK) and curricular role identity for teaching science, as well as the potential relationship between these two constructs. Participants were recruited from a group of preservice early childhood and elementary teacher candidates (N = 65) completing an undergraduate teacher education program at a university in the southeastern United States.

Using a mixed-methods design, the preservice teachers’ pedagogical content knowledge and curricular role identity were assessed using concept maps and a curricular …

The Comparative Effects Of Three Virtual Nature Exposure Methods On State Social Motivation: A Randomized Controlled Trial, Samantha A. Castelblanco

Electronic Theses and Dissertations

It is well established in the research literature that exposure to nature positively affects physical and mental health. However, research regarding the effects of nature exposure on social health is less developed. Prior research found that watching a video of nature improved state social motivation. Building on this research, the current study compared the effects of three methods of virtual nature exposure on state social motivation in a randomized controlled trial. In this 3X3 between-subjects experiment, participants (N = 426) 18 to 73 (M_Age = 27.69, SD = 12.19) were randomly assigned to experience 3-minutes of nature …

Using Peer-Models And Aac To Increase Expressive Vocabulary In Preschool Children With Developmental Delays, Jazmine Wiles

Electronic Theses and Dissertations

The purpose of this study was to examine the effects of training peer models to implement the system of least prompts and model augmentative and alternative communication (AAC) on expressive language in children with developmental delays. Using a multiple probe across participants design, 4 students with developmental delays were trained to use a language output app on the iPad to communicate five common phrases. Results for 3 participants indicated a functional relation between the peer modeling and expressive language. One student did not complete the intervention due to excessive absences. In most cases, students increased verbal language. Two participants made …

John Horton Conway: The Man And His Knot Theory, Dillon Ketron

Electronic Theses and Dissertations

John Horton Conway was a British mathematician in the twentieth century. He made notable achievements in fields such as algebra, number theory, and knot theory. He was a renowned professor at Cambridge University and later Princeton. His contributions to algebra include his discovery of the Conway group, a group in twenty-four dimensions, and the Conway Constellation. He contributed to number theory with his development of the surreal numbers. His Game of Life earned him long-lasting fame. He contributed to knot theory with his developments of the Conway polynomial, Conway sphere, and Conway notation.

Finding A Representative Distribution For The Tail Index Alpha, Α, For Stock Return Data From The New York Stock Exchange, Jett Burns

Electronic Theses and Dissertations

Statistical inference is a tool for creating models that can accurately display real-world events. Special importance is given to the financial methods that model risk and large price movements. A parameter that describes tail heaviness, and risk overall, is α. This research finds a representative distribution that models α. The absolute value of standardized stock returns from the Center for Research on Security Prices are used in this research. The inference is performed using R. Approximations for α are found using the ptsuite package. The GAMLSS package employs maximum likelihood estimation to estimate distribution parameters using the CRSP data. The …

The Impact Of Mentoring In Closing The Achievement Gap For Black Male Students At A Predominantly White University In Tennessee, Patricia Waire Harlan

Electronic Theses and Dissertations

This phenomenological study addressed the factors of an institutionalized peer to peer mentoring program that fostered academic success and persistence among Black male students graduating from a predominantly White four-year public university in Tennessee through the lens of the critical race theory. Data was gathered through face-to-face, open-ended, semi-structured interviews via Zoom with twelve participants that graduated between 2014 and 2022. Study participants were grouped into group 1 as those Black male students that were not impacted by the global pandemic and group 2 as those Black male students that were impacted by the global pandemic. Emerging themes and categories …

The Effects Of Schema-Based Instruction On Students At Risk For Or With Learning Disabilities, Molly Daniels

Electronic Theses and Dissertations

The purpose of this study was to examine the effects of schema-based instruction (SBI) on the correct response of 2 second-grade students at risk for or already determined to have a learning disability (LD) of comparison difference word problems. The study was a multiple probe across participants. Although the students did not use the RUN Strategy, one student’s ability to solve the word problems improved significantly after learning the strategy. Even though time was a factor in completing everything, the other student’s score did begin to improve after learning the RUN Strategy.

Water Quality Assessment Of Karst Spring Water As A Private Water Supply Source In Northeast Tennessee, Lukman Fashina

Electronic Theses and Dissertations

Karst springs are an essential source of private water supply for about 10% of households in Tennessee. However, these springs, which can be easily polluted, are unregulated. This study, therefore, assesses water quality spatial patterns and water quality rating of roadside springs in northeast Tennessee.

Karst spring water samples collected from 50 springs were assessed using EPA Standard methods for pathogens, nutrients, radon, and physicochemical parameters. Springs generally met federal and state standards for physicochemical parameters, 90% of samples contained E. coli, and all samples contained fecal coliform. High E. coli was spatially clustered causing a fecal contamination hot …

Positive Behavior Interventions And Supports Effectiveness In Southeastern Ohio, Kacey Ryan Cottrill

Electronic Theses and Dissertations

Abstract

The purpose of this study was to determine how leadership implemented the positive behavioral interventions and supports (PBIS) framework and what conclusions could be ascertained from implementing it. Leadership in southeastern Ohio districts was examined to understand how they used PBIS and if PBIS made significant differences before and after implementation. The comparison included demographically diverse areas (urban, suburban, rural) in southeastern Ohio. PBIS implementation was measured with the School-wide Evaluation Tool (SET) administered to district administrators. The resulting data from the SET and Ohio assessment scores showed no significant difference in PBIS implementation and fourth-grade reading scores of …

A Phenomenological Study On Career Ascension And Advancement Of African American Women In Senior Academic Leadership At Historically Black Colleges And Universities, Meka Francis

Electronic Theses and Dissertations

The U. S. Department of Labor Statistics (2018) reported that there were more than 10 million (53%) African American women in the civilian labor force. However, there is a growing concern of African-American women who are underrepresented in higher educational leadership. There are only few studies that focus on the barriers and challenges that African American women encounter. These barriers prevent them from advancing and ascending in positions of higher education leadership. This phenomenological study explored their perceived personal and professional challenges regarding race and gender, as well as highlighted strategies, employed by African-American women in senior academic leadership positions, …

Is There More Than One Way? Examining Alternative Pathway Teacher Effectiveness Through The Experiences And Perceptions Of Principals In Urban, Low-Socioeconomic Schools In Oklahoma, Julianne Hennessy Denton

Electronic Theses and Dissertations

Teacher quality continues to be recognized as one of the strongest predictors of student success and school improvement. The quality of an educator is also critical to being able to address the growing achievement and opportunity gap in schools and communities that are marked by concentrated poverty. Therefore, principals are under significant pressure to recruit, train, support, and retain highly qualified teachers, so all students have access to quality education. The purpose of this qualitative case study was to generate knowledge of alternative pathway teachers’ effectiveness in the classroom from an administrative point of view, specifically in urban, low socioeconomic, …

Perceptions Of Race, Status, And Instructional Modality As Predictors Of Degree Attainment For African American Male Community College Students, Roderick C. Lewis Sr.

Electronic Theses and Dissertations

Given the large number of students who begin their college education yet never graduate, it is essential that, as higher education leaders and policymakers develop student success strategies, they consider the persistence and degree attainment dynamics of all populations. This study focuses on the problem of degree attainment from the perspective of male, second-year, African American, community college students. A qualitative narrative case study approach was used to ascertain their perception of race, status attainment, and instructional learning modalities as predictors of degree attainment. Accordingly, those perceptions were then evaluated to determine their utility as predictors of degree attainment. Six …

The Impact Of Disruptive Physician Behavior On Support Staff And Patients: A Quantitative Secondary Analysis, Michael C. Marino

Electronic Theses and Dissertations

In this quantitative secondary analysis, the purpose was to examine the nature of disruptive physician behavior (DPB) from the support staff and patient perspectives. Healthcare staffing shortages existed prior to the global pandemic and have increased, creating importance for employee retention and recruitment. I wanted to understand the impact of physician behavior on staff turnover rates in a private oncology practice, its effect on patient satisfaction rates, and to compare these rates of physicians that display DPB with physicians that do not display this behavior in a private hematology oncology community outpatient setting in the Southwest United States. To answer …

The Underrepresentation Of Women In Building Trades Programs And Careers: Perceptions Behind The Educational And Career Decision-Making Process, Ethel J. Clayton

Electronic Theses and Dissertations

Abstract

Women may perceive barriers when considering educational and career options in predominately male-dominated STEM-focused (science, technology, engineering, and mathematics) programs and settings. This qualitative, phenomenological study, emphasizing the social cognitive career theory, explored women’s perceptions that influenced the decision-making process to pursue nontraditional educational paths and careers in career and technical education fields such as architecture and construction while considering gender-associated challenges, culture and racial-ethnicity, and career and technical education stigma. Six adult female participants (three students and three leaders) responded to semistructured questions within a focus group and one-on-one interviews via telephone conferencing. A thematic analysis process using …

Multi-Agent Pathfinding In Mixed Discrete-Continuous Time And Space, Thayne T. Walker

Electronic Theses and Dissertations

In the multi-agent pathfinding (MAPF) problem, agents must move from their current locations to their individual destinations while avoiding collisions. Ideally, agents move to their destinations as quickly and efficiently as possible. MAPF has many real-world applications such as navigation, warehouse automation, package delivery and games. Coordination of agents is necessary in order to avoid conflicts, however, it can be very computationally expensive to find mutually conflict-free paths for multiple agents – especially as the number of agents is increased. Existing state-ofthe- art algorithms have been focused on simplified problems on grids where agents have no shape or volume, and …