Digital Commons Network^™

Interpreting Shift Encoders As State Space Models For Stationary Time Series, Patrick Donkoh

Electronic Theses and Dissertations

Time series analysis is a statistical technique used to analyze sequential data points collected or recorded over time. While traditional models such as autoregressive models and moving average models have performed sufficiently for time series analysis, the advent of artificial neural networks has provided models that have suggested improved performance. In this research, we provide a custom neural network; a shift encoder that can capture the intricate temporal patterns of time series data. We then compare the sparse matrix of the shift encoder to the parameters of the autoregressive model and observe the similarities. We further explore how we can …

Comparative Analysis Of Acceptance And Commitment Therapy’S Effectiveness In An Intensive Outpatient Program Setting, Efrain Frank Ellin Iii

Electronic Theses and Dissertations

This thesis presents a comparative analysis of acceptance and commitment therapy (ACT) and treatment as usual (TAU) within an intensive outpatient program setting, evaluating their effectiveness in enhancing various dimensions of psychological well-being. Guided by two main research questions, the study investigates whether ACT demonstrates greater or equal effectiveness compared to TAU and if it provides more immediate effects on psychological well-being within three weeks. Utilizing a quasi-experimental design, the research incorporates a comprehensive array of measurement tools to assess outcomes related to anxiety, depression, stress, psychological flexibility, cognitive flexibility, emotion regulation, mindfulness self-efficacy, and life satisfaction among participants. The …

College And Career Readiness Effects On Minority Male College Retention, Naquiyah Lashawn Hodges

Electronic Theses and Dissertations

Abstract

The continuously low college retention and low degree attainment of African American and Hispanic men is a generational and decades-long hindrance to the elevation of these marginalized communities in the United States and the state of Texas. In Texas, the last 3 years’ worth of data has proven college-readiness rates of African American and Hispanic college students were significantly lower by large margins than White students in English language arts, math, and both subjects by large margins. Consistent low college retention rates of minority men produce a need to conduct further research of how this phenomenon affects minority men …

Does My Voice Matter? Understanding The Lived Experiences And Turnover Intentions Of Professional Academic Advisors, Keith Kanard Douglas

Electronic Theses and Dissertations

Academic advising has been a vital aspect of the higher education setting for at least a century. Academic advising has evolved from the vocational development of young men to a full-time profession, especially after the creation of the National Academic Advising Association in 1979. Although the academic profession has developed through research, master’s programs, and courses designed to expand the field of academic advising, researchers still question whether full-time academic advising is a profession. Questions regarding the legitimacy of the work of academic advisors have led to miscommunication between upper administrators within the university. Universities have experienced a trend of …

Using Standardized Assessments To Forecast Success Or Failure On The Nclex, Zelia Souza Mcgaha

Electronic Theses and Dissertations

The national shortage of nurses has worsened in the United States and is a cause for concern for the health care industry and society. The decreased number of nurses graduating and passing the national boards worsens the quality of patient care, contributing to the decline in treating the sick and leading to negative outcomes. Nursing students must demonstrate competency to care for patients before receiving their licensure as registered nurses by passing the National Council Licensure Examination for Registered Nurses (NCLEX-RN). A nursing school in East Texas uses preadmissions science grade point average (SGPA) and the Assessment Technologies Institute (ATI) …

Lost In The Identification Process: Where Are Gifted Blacks And Other Minorities In Gifted And Talented Education?, Tiffany M. Chenier

Electronic Theses and Dissertations

Abstract

The underrepresentation of African American and Hispanic students in gifted and talented (GT) education has persisted for decades, prompting a need for deeper investigation into the policies and procedures governing GT identification. The aim of this research was to investigate whether variations in practices for GT identification and the definition of giftedness, contribute to this underrepresentation. This qualitative case study used predetermined criteria outlined in the Texas State Plan for the Education of Gifted and Talented Students to examine the contents of each district’s GT identification plan available in electronic or downloadable form using document analysis. I also used …

P300 Event-Related Potential Responses To Self-Relevant Stimuli, Jordan Razzak

Electronic Theses and Dissertations

Previous literature has suggested an apparent P300 sensitivity to self-relevant stimuli. To further explore this relationship, we asked participants to submit 10 photos, each of a particular category (e.g. footwear, plants), to be used as either targets or distractors in a given condition of an oddball task. Furthermore, we attempted to see whether the effect of self-relevance on the P300 could be induced in a participant by allowing them to study a set of unique photos which would then be used as targets. Our analysis suggested that P300 amplitude elicited in response to self-relevant stimuli used as targets was statistically …

“They Can’T Just Stamp Out This Faith”: Cold War Anti-Communism And International Evangelism At The Appalachian Preaching Mission, Braden Lay

Electronic Theses and Dissertations

The Appalachian Preaching Missions (1955-1981) occurred annually in Northeast Tennessee, with their predecessor, the Bristol Preaching Mission, dating back to at least 1949. Local churches, primarily Protestant, organized and convened these annual ecumenical gatherings. Nationally known clergy and laypeople from various denominations spoke, with up to several thousand congregants attending each mission. These individuals provided sermons and speeches on spiritual, domestic, and international issues. Among the most consistently repeated sermon themes was Christianity’s spiritual conflict with atheistic communism. This work addresses the missions’ origins and how the speakers spoke on international Christian missions in decolonized or developing nations as threatened …

Queer Student Or Student Who Is Also Queer? A Mixed Methods Study Of Competing Master Statuses In Higher Education, Kayla Densberger

Electronic Theses and Dissertations

People pursuing LGBTQ+ rights in the United States have faced triumphs and setbacks over time but now face equality-restricting legislation in several regions. Previous researchers have studied LGBTQ+ college students and LGBTQ+ identity as a master status, but less on how queer identity competes for salience with other identities. This study uses qualitative and quantitative secondary data on student responses to a university-wide climate survey (n=1699) conducted in the Fall semester of 2022. I analyze LGBTQ+ and non-LGBTQ+ student experiences and satisfaction with their school. The quantitative results of this research find that LGBTQ+ students have a markedly different campus …

Developing A Suitability Model And Feasibility Report For The Tennessee Mesonet, Tristan Holmes

Electronic Theses and Dissertations

Mesoscale networks, also known as Mesonets, are advanced environmental monitoring systems that consist of multiple high-quality weather stations that collect meteorological data at frequent intervals (5 minutes or less). Tennessee currently lacks a Mesonet system, and this study identifies suitable and feasible locations for stations in all 95 counties. Layers needed to develop the suitability model included land cover, road centerlines, elevation, flood zones, building footprints, and hydrologic soil types. Geospatial analysis techniques were used to process and combine these layers to identify suitable areas. Once suitable areas were determined, a feasibility assessment that examined land ownership, accessibility, and cell …

Formalization Of A Security Framework Design For A Health Prescription Assistant In An Internet Of Things System, Thomas Rolando Mellema

Electronic Theses and Dissertations

Security system design flaws will create greater risks and repercussions as the systems being secured further integrate into our daily life. One such application example is incorporating the powerful potential of the concept of the Internet of Things (IoT) into software services engineered for improving the practices of monitoring and prescribing effective healthcare to patients. A study was performed in this application area in order to specify a security system design for a Health Prescription Assistant (HPA) that operated with medical IoT (mIoT) devices in a healthcare environment. Although the efficiency of this system was measured, little was presented to …

Teacher Attrition: A Quantitative Analysis Of Driving Factors And Potential Solutions Among Highly Qualified K-12 U.S. Public School Teachers, Shari Donch

Electronic Theses and Dissertations

A comprehensive analysis is necessary to determine the cause of and solutions for the rate of K12 teacher attrition in the United States. Researchers have sought to understand the root causes of attrition or the institutional factors that influence teachers to voluntarily change professions. The most frequently identified factors include the personal characteristics of these teachers, freedom of curriculum development, teacher autonomy, and resources such as salaries. Evidence shows that this attrition among highly qualified teachers is detrimental to the quality of education, particularly in terms of student outcomes, and substantiates that effective initiatives surrounding remediation of these factors are …

Children's Beliefs About Search Engines., Lauren N. Girouard-Hallam

Electronic Theses and Dissertations

Children rely on information from other sources to think and learn about the world around them. As the world around them digitizes, their options for where to seek new information have expanded to include technological sources like Google Search. This dissertation examines what factors impact children’s trust in search engines, particularly Google. In the first set of studies, 4- to 8-year old children were asked whether technological informants and a teacher could answer stable and changing questions, and which informant would have the better answer. With age, children endorsed the Google search engine at higher rates and the teacher at …

Using Dynamic Schemas For Query Optimization Over Json Data., Tomas Felipe Llano-Rios

Electronic Theses and Dissertations

Query optimization in document stores has traditionally relied on rule-based approaches, but recent research advocates for a shift towards cost-based optimization. However, this transition is hindered by the fragmented nature of existing approaches, stemming from the early development stage of cost-based query optimization for document databases. A key challenge lies in the absence of a standardized query language and semantics, exacerbated by the diverse and schema-less nature of JSON document collections. To tackle these challenges, the literature has proposed dynamic schemas, primarily utilized at parsing time. However, these schemas lack a formal foundation that describes meaningful semantics for query optimization. …

A Design Science And Implementation Framework For Studying Interruptions And Its Application In A Dental Clinic., Carsten Ziegler

Electronic Theses and Dissertations

Interruptions during dental treatment are frequent, and often have detrimental effects on quality of care, patient safety and processing times, and have an impact on provider satisfaction and performance. Interruptions can significantly increase the cognitive load on dental providers, making it hard for them to concentrate on complex procedures. Frequent interruptions also disrupt the workflow in general, leading to delays in treatment, which can reduce the overall throughput of a clinic. Unfortunately, there is no comprehensive approach to collectively (i) analyze interruptions in dental healthcare, (ii) design an intervention, and (iii) implement and sustain it. This research proposes a comprehensive …

Anthropogenic Litter In Urban Waterways: An Analysis Of Litter, Urbanization, And The Emerging Role Of Citizen Science In Beargrass Creek, Louisville, Ky., Ella Swigler

Electronic Theses and Dissertations

This thesis addressed the ever growing presence and persistence of anthropogenic litter (AL) in urban waterways. AL has been studied in marine environments, but research gaps exist in riverine ecosystems. Most of the AL that reaches the Earth’s oceans is carried by urban rivers, so understanding the relationship between these waterways and AL is critical in effectively fighting AL accumulation, especially for legacy plastic pollutants. The study explored fifteen sites throughout Beargrass Creek and recorded the quantity and type of AL present throughout the summer and fall of 2023. The National Geographic Marine Debris Tracker App was employed to successfully …

Attention Guided Data Augmentation For Improving The Classification Performance Of Vision Transformers., Nada Baili

Electronic Theses and Dissertations

For over a decade, Deep Neural Networks (DNNs) have been rapidly progressing and achieving great success, forming a robust foundation of state of the art machine learning algorithms that impacted various domains. The advances in data acquisition and processing have undeniably played a major role in these breakthroughs. Data is a crucial component in building successful DNNs, as it enables machine learning models to optimize complex architectures, necessary to perform certain difficult tasks. However, acquiring large-scale data sets is not enough to learn robust models with generalizable features. Instead, an ideal training set should be diverse enough and contain enough …

Pre-Columbian Soil Management, Settlement, And Land Use In Amazonia: Insights Using Micro-Regional Predictive Modelling In Gurupá, Brazil., Lauren Zacks

Electronic Theses and Dissertations

The results of a micro-regional predictive model of terra preta sites in the municipality of Gurupá are presented here. A Maximum Entropy approach was selected and modified to fit a presence-background model, rather than a presence-absence model typical of binary classifications. 13 known terra preta sites were used as input samples for the relative suitability model, with explanatory variables in the respective categories of topography, hydrology, soil type and vegetation index. A 30m spatial resolution DEM served as the basis for the former two categories, while additional TauDEM analysis was performed for the hydrology category. A Sentinel-2A mosaicked quarterly composite …

Do American Bison Practice Democracy? Group Consensus Decision Making Drives Bison Herd Movements And Cohesion., Matthew Sapien

Electronic Theses and Dissertations

The American bison is an iconic mammal that lives in large social herds and is considered a threatened species. Little is known about how bison make decisions as a group, whether through despotic individuals or group consensus. In this dissertation, I researched the mechanisms bison use to make herd movement decisions in 3 herds in the United States. In chapter one I examined the number of bison that participated in voting events for herd movement decisions and whether the final movement decision matched the direction with the most votes. Bison herd movements did match the direction with the most adult …

Inside The Dojo Of Digital Media: What Marginalized Student Perspectives Reveal About Multiliteracy Center Practices., Lauren Fusilier

Electronic Theses and Dissertations

Multiliteracy centers serve as vital hubs for supporting students' digital media composing needs, especially those pertaining to digital literacy. This qualitative interview case study evaluates the efficacy of standard practices established by multiliteracy center scholarship, focusing on spatial design, tutor preparedness, and student engagement at the University of Louisville’s Digital Media Suite (DMS). Recognizing the significance of multiliteracy centers as sites of social and material access for marginalized students, this project gathers the experiences of first-generation and post-traditional student participants to inform recommendations for expanding practices to better accommodate diverse student demographics on university campuses. Informed by Black feminist research …

The Superhero Gothic: The Montrous Hero To The Heroic Monster In The Twentieth Century., John Darowski

Electronic Theses and Dissertations

The influence of Gothic literature and its adaptations on the superhero genre has been profound. Both genres have an ideological project of the restoration of normalcy and order after disruption and disorder, thereby reinforcing cultural norms. However, their themes and methodologies are diametrically opposed. The Gothic is an exploration of the negative aesthetics of terror and horror, which reveal human weaknesses. The superhero is a power fantasy that celebrates justice and morality. A synthesis of the two creates a paradox: the monstrous hero—a Hoppen stand hero who takes on the attributes of a monster—who evolves into the heroic monster—a monster …

Preclinical Stability Assessment Of Epicertin, A Biotherapeutic Candidate For Ulcerative Colitis Mucosal Healing., Wendy Michelle Kittle

Electronic Theses and Dissertations

EPICERTIN is a biotherapeutic candidate for mucosal healing in ulcerative colitis (UC), a major type of inflammatory bowel disease (IBD). Despite the critical role of mucosal healing in achieving successful remission of UC, there are currently no targeted mucosal healing agents available. EPICERTIN has previously demonstrated epithelial repair and mucosal healing activity in colon epithelial cells, murine colitis models, and tissue explants from IBD patients, highlighting its therapeutic potential to meet this unmet need for UC patients. The development of appropriate chemistry, manufacturing, and controls (CMC) data will facilitate our ultimate goal to bring EPICERTIN to the clinic for a …

Barocaloric Heat Pumps Based On Soft Materials., Naveen Weerasekera

Electronic Theses and Dissertations

Solid-state refrigeration offers a promising alternative to traditional vapor compression systems that are relatively inefficient, unreliable, and have a high global warming potential. Various solid-state cooling technologies, including those based on electrocaloric, magnetocaloric, and elastocaloric effects have been investigated in the recent past. However, concerns regarding their efficiency, scalability and cost remain. Refrigeration and heat pump technologies based on the barocaloric effect (temperature/entropy change due to hydrostatic pressure) hold great promise but have received comparatively less attention. Barocaloric heating/cooling based on low cost, compressible soft materials with large barocaloric response have the potential to pave the way for efficient, scalable, …

Multimodal Stylometry: A Novel Approach For Authorship Identification., Glory O. Adebayo

Electronic Theses and Dissertations

This dissertation introduces multimodal stylometry, a novel approach to authorship identification that integrates text and source code features for a comprehensive understanding of an author's unique style. Traditional stylometric methods have primarily focused on either text stylometry or source code stylometry, thereby neglecting the potential insights that multimodality may provide. This research aims to bridge this gap by proposing a framework that combines textual and source code data to enhance the accuracy and reliability of authorship identification. The study begins by reviewing existing literature on authorship identification and stylometry, highlighting the limitations of unimodal approaches. Leveraging recent advancements in multimodal …

Context Dependent Training Data Selection For Automatic Target Detection., Tylman Michael

Electronic Theses and Dissertations

An Automatic Target Detection (ATD) algorithm is capable of identifying the location of targets of interest captured by Infra-Red imagery in vastly different contexts. ATD is often a precursor in a 2-stage methodology in order to ascertain the location and nature of a target in both military and civilian applications. In order to train an ATD algorithm, a large amount of data from varied sources is required. One drawback of this requirement is that some sources of data may harm the performance of the method in different contexts. This thesis explores utilizing an unsupervised method to identify a subset of …

Providing Safe Spaces: An Examination Of Trio Sss Students’ Personal And Academic Self-Efficacy During Covid-19., Matthew Mcclendon

Electronic Theses and Dissertations

This qualitative study aimed to examine the impact of the TRIO SSS Program in increasing the academic preparedness, graduation rates, and personal development of first-generation college students. Specifically, the study examined how TRIO SSS affected students’ self-efficacy through academic performance and personal development during the COVID-19 pandemic. The theoretical lens for this study was the Social Cognitive Career Theory (SCCT) in which Lent et al. (1994) presented the SCCT as a particularly appropriate framework for those in the early stages of exploring and preparing for careers. A case study methodology, specifically an intrinsic case study, was utilized to investigate the …

Development, 3d Printing, And Sintering Of Aluminum-Magnesium Alloy Pastes For In-Space Manufacturing Applications, Fatou Ndiaye

Electronic Theses and Dissertations

This study explores the additive manufacturing process of paste printing, sintering, and de-binding for fabricating aluminum-magnesium alloy components. The paste formulation involved combining aluminum powder with varying magnesium concentrations, utilizing acrylic polyol, solvent, and plasticizer to create a homogeneous mixture. Printing parameters were optimized to ensure continuous pressure for improved extrusion. Sintering conditions involved incremental temperature increases with nitrogen flow to remove solvents. Density measurements, tensile tests, and shrinkage calculations were conducted to assess part quality post-sintering. The study revealed significant improvements in part quality with 5 wt.% magnesium incorporation within aluminum, although density and tensile strength fell short of …

The Examination Of Intratumoral Compression As A Mechanobiological Driver Of Glioblastoma Progression., Allison Mckenzie Johnson

Electronic Theses and Dissertations

Glioblastoma diagnosis has one of the lowest average life expectancies at only 14 months. Recurrent tumor formation and progression despite aggressive chemotherapy and radiation significantly contributes to the poor prognosis. Recurrence is likely due to mesenchymal cells breaking off from the primary tumor, infiltrating the parenchyma to establish secondary tumors. Mesenchymal cells initially undergo an epithelial to mesenchymal transition, characterized by a loss of cell-cell adhesion, increased migration and increased proliferation. While this transition can be chemically induced, there is a gap of understanding surrounding physical activation of this pathway. The tumor microenvironment is mechanically active with the cells responding …

Sustainable Methodologies For Synthesis Of Small Organic Molecules Using Micellar Catalysis., Deborah Sam Ogulu

Electronic Theses and Dissertations

Organic synthesis is a critical process in the creation of small molecule pharmaceuticals and agrochemicals. However, most methods for synthesizing these small molecules rely on toxic organic solvents as the reaction medium which account for approximately 80% of pharmaceutical waste. Moreover, many catalytic reactions require expensive endangered precious metals like palladium and costly metals. This dissertation presents research that aims to develop sustainable, eco-friendly reaction conditions to address these issues. We developed a ligand-free bimetallic nanocatalyst for the hydrogenation of unsaturated enones. This ligand-free nanocatalyst was prepared from nickel and ppm loading of palladium and was stabilized by harnessing the …

Still I Rise: A Critical Utopian Action Research Study On Black Femme-Identifying And Gender Expansive Emerging Adults In Technology Leadership., Alisia Mcclain

Electronic Theses and Dissertations

This Critical Utopian Action Research (CUAR) study delves into the intersection of authentic leadership, Black Feminist Thought (BFT), and technology leadership development, focusing on the perspectives of emerging adult Black femme-identifying or gender-expansive individuals. Addressing two primary research questions, the study investigates their idealized visions for technology leadership programs and discerns key factors differentiating authentic leadership from models incorporating BFT. Through qualitative analysis of Future-Creating Workshop outputs and participant narratives, the study unveils multifaceted themes. Participants articulate a vision of technology leadership development rooted in authenticity, intersectionality, and inclusivity. Their ideal programs prioritize celebrating complex identities, engaging through technology, and …