Digital Commons Network^™

Consensus-Based Active And Reactive Power Control And Management Of Microgrids, Shruti Singh

Electronic Theses and Dissertations

Microgrids incorporating distributed generation and renewable energy sources offer potential solutions to the energy crisis while modernizing traditional grids. Despite cost-effectiveness in some technologies, financial support remains crucial for expensive ones like PV, fuel cells, and storage technologies. Microgrids bring economic benefits, efficiency, reduced emissions, and improved power quality. Their success hinges on cost reductions in renewables, storage, reliability, and energy management systems, enabling operation both with and without the utility grid.

Economic Dispatch optimizes system costs, considering all constraints. Various methods tackle this problem, including quadratic convex functions, Lagrangian relaxation, and quadratic programming. For microgrids with distributed generators, seamless …

Queer Interethnic Relationships: Couple-Level Minority Stress And Resilience For Intersectionally Marginalized Partners, Sree Sinha

Electronic Theses and Dissertations

Interethnic relationships and same-sex relationships continue to increase in the U.S. While LGBQ and heterosexual people are equally likely to be in romantic relationships, LGBQ individuals are more likely than their straight peers to be in an interracial or interethnic romantic relationship. The present work aims to expand intersectional investigations regarding queer people of color (QPOC), including accounting for their individual as well as relational well-being, by use of the couple-level minority stress (CLMS) paradigm. CLMS theory speaks to the unique stressors experienced as a result of being in a relationship that is societally marginalized, impacting both dyadic and individual …

Exploring The Intersectional Higher Education Experiences Of Latinx Students, Miguel A. Trujillo

Electronic Theses and Dissertations

The intersectional experiences of Latinx students in higher education have largely gone underexplored in the literature, particularly when it comes to Latino men. The current literature treats the experiences of the Latinx community as a monolith, when there are multiple potentially impactful intersectional aspects of identity that could influence our lived experiences, such as generational status, documentation status, country of origin, and gender. This three-manuscript dissertation addresses these gaps in the literature by both conducting research that is more descriptive of our respective within-group community and by focusing on the impact that gender may play in the experiences of Latinx …

Older Women’S Stories Of Covid-19 Loss: Communicated Narrative Sense-Making Through Photography, Anne Walker

Electronic Theses and Dissertations

The diverse array of challenges associated with the COVID-19 pandemic make it difficult to assess the full impact of this global health crisis. More than 300,000 older Americans died, leaving a nation of grieving survivors in their absence. This profound loss of life will undoubtedly inform the field’s understanding of grief and grieving for many years to come. Pre-pandemic, older women in the United States understood grief to be part of their life stage; COVID-19 amplified the grief experience through both cumulative losses and the isolation particular to the novel coronavirus response. However, few qualitative studies explore older women’s grief, …

Controllable Language Generation Using Deep Learning, Rohola Zandie

Electronic Theses and Dissertations

The advent of deep neural networks has sparked a revolution in Artificial Intelligence (AI), notably with the creation of Transformer models like GPT-X and ChatGPT. These models have surpassed previous methods in various Natural Language Processing (NLP) tasks. As the NLP field evolves, there is a need to further understand and question the capabilities of these models. Text generation, a crucial part of NLP, remains an area where our comprehension is limited while being critical in research.

This dissertation focuses on the challenging problem of controlling the general behaviors of language models such as sentiment, topical focus, and logical reasoning. …

Building Teachers’ Capacity To Implement Equitable Family, School, And Community Partnerships Through School Psychologists’ Consultation: The Partnership Capacity Building Consultation Model And Case Study, Bryanna S. Fatigate

Electronic Theses and Dissertations

The urgency to prioritize equity-driven policies is amplified by the disproportionate education and health outcomes that emerged during the COVID-19 pandemic. Eradicating inequity demands the prioritization of robust family, school, and community partnerships (FSCP). For decades, research has highlighted the benefits of FSCP, which may include improvements in student academic achievement, behavior, ratings of school climate, and attendance; furthermore, FSCP is associated with higher guardian involvement, mentor opportunities, career development, and a reduced need for more intensive services such as special education (Adelman & Taylor, 2015; Anderson- Butcher & Anderson, 2018; Constantino, 2016). To reap the benefits of such partnerships, …

The Treasury Of Stories: Policy Narratives Of Anti-Illicit Finance, Paul Christopher Kemp

Electronic Theses and Dissertations

This dissertation explores how the US government identifies and responds to the problem of illicit finance, specifically, why the US Treasury utilizes certain approaches over others. I employ a comparative case study of three relatively recent, non-traditional approaches in the Treasury’s anti-illicit finance repertoire: targeted financial sanctions (a case of strong policy action), anti-money laundering in real estate (a case of tentative policy action), and the proposed demonetization of high denomination notes (a case of policy inaction). While considering a wide range of plausible explanations for this variation in policy action, I argue that the Treasury’s decision to either …

Not Too Scared To Enter: Understanding The Uppsala Model’S Complexity As Sme Decision Makers Enter High-Risk Countries, Andrew Kindfuller

Electronic Theses and Dissertations

Johanson and Vahlne’s Uppsala internationalization model is a framework for understanding sequential internationalization, experiential learning, and the commitment decision processes designed to answer the question: “Why and how do firms internationalize?” Each potential market is distinctive due to dissimilar languages, cultures, religions, ethics, political systems, laws, business norms, etc. – all these perceptual differences, which can potentially block the free flow of information between markets, are called “psychic distance.” By completing 34 detailed, semi-structured interviews with executives who have recently made significant financial or resource commitments to enter 28 different challenging countries, this is the first study to focus with …

Historical Narrative In The Music Of Sid Meier’S Civilization Vi, Alec Larner

Electronic Theses and Dissertations

Sid Meier’s Civilization VI is a 2016 strategy video game in which the player leads a historical civilization from 4000 BC to the present. The Civilization series is the subject of much scholarly writing, especially its representation of history and non- Western cultures. My work builds on Karen Cook’s research (2014) on the technological progress and American hegemonic identity signaled by Civilization IV’s soundtrack. I argue that the music in Civilization VI contributes to a Eurocentric teleological progress narrative of history inherent in the structure of the game: the idea that history is a story of inevitable and positive …

Risky Behavior As Motivated Emotion Regulation: A Mixed-Method Approach, Lyneé A. Herrera

Electronic Theses and Dissertations

Engaging in risky health behaviors is a ubiquitous human experience that often marks developmental progression from adolescence into adulthood. While much previous research has framed risky behaviors in terms of negative legal, social, and public health consequences, less empirical work has been done on potential benefits of their engagement. A growing body of research has identified emotion regulation deficits as a significant driver of risky behavior engagement, suggesting that these behaviors may offer perceived emotional benefits when other regulation strategies are less accessible. Previous research has shown that emotional outcomes can be influenced by the regulation strategies one chooses to …

International Doctoral Student Experiences In Educational Administration Programs In The United States: A Phenomenological Study, Ping Robert

Electronic Theses and Dissertations

Background: In recent years, more international students are enrolling in Educational Administration (EA) programs in the United States. While EA programs wish to recruit and retain international students, more research is needed on supporting international graduate students in graduate education programs and EA programs specifically. Purpose: The present phenomenological study aims to understand the experience of international doctoral students in U.S. EA programs. The present research was guided by the question: “What is the essence of international postgraduate student experiences in EA programs in the United States?” Methodology: The present study used hermeneutic phenomenology to describe and interpret data from …

The Gender And Race Intersectional Disproportionality-Tool (Grid-T): An Exploration Of Practitioners’ Access To And Use Of High-Quality Data For Special Education Placement, Audrey J. Ford

Electronic Theses and Dissertations

Disproportionality in special education (SPED) is upheld by systems and individuals, policies, and practices that both reflect and shape the local communities within which it exists. Even with many proposed solutions for disproportionality, it persists. This two-manuscript dissertation explores two characteristics that make disproportionality difficult to solve (e.g., inconsistent findings and persistence) and proposes a tool to inform data-based decision making in interventions for disproportionality in SPED.

Manuscript One (M1) includes a literature review and development of the Gender and Race Intersectionality Disproportionality- Tool (GRID-T). Based on the findings of the literature review about inconsistence and persistence, I crafted three …

The Struggle Is Real: Constructing Liberative Meaning Making That Facilitates Black Student’S Authentic Identity Formation And Navigation Through Predominately White Institutions, Felicia Marie George

Electronic Theses and Dissertations

This dissertation focuses on how Black students’ use of navigational capital reflects a quest for complex subjectivity that facilitates authentic identity formation and navigation through a private, predominantly white, four-year, R1 institution (PWI’s). A qualitative study that used portraiture methodology was conducted to collect stories of the lived experience and perceptions of two Black senior undergraduate students who attended a PWI. Their stories provided the foundation for constructing liberative meaning making (LMM), an ethic of praxis that uses a hermeneutics of listening to heighten students’ awareness of and living from interiority. The concept engages De La Torre’s theory of liberative …

Childhood Maltreatment And Romantic Relationship Functioning During Pregnancy: Women’S Narrative Coherence About Partners And Couples’ Conflict Communication And Recovery, Laura M. River

Electronic Theses and Dissertations

Childhood maltreatment (CM) is associated with difficulties in romantic relationships in adulthood, including conflict, less support, and difficulties in communication. However, little is known about the impact of CM on romantic relationship functioning in the context of pregnancy, during which time romantic relationships are highly influential for family well-being. Additionally, very limited research has been conducted on fathers’ relationship experiences after a history of CM. In a set of two papers, this dissertation examined the effects of CM on 1) pregnant women’s narrative coherence about their romantic partners and 2) couples’ (pregnant women and babies’ fathers) observed conflict communication and …

The Post-Wwii American Picaro As Prophet Of Human Dignity: A Study Of Ralph Ellison’S Invisible Man, Flannery O’Connor’S The Violent Bear It Away, And Saul Bellow’S Henderson The Rain King, Elijah Clayton Null

Electronic Theses and Dissertations

The picaro, a rascal or rogue who tells his or her life story, is an important but understudied figure in midcentury American letters. Critics of the 1960s, such as R.W.B. Lewis, often discussed the picaro and the picaresque, but recent American scholarship has not revisited the role and importance of this figure and genre.

This study employs the methodologies of historicism, formalism, and intellectual history to explain how American authors in the period after WWII used the picaro and picaresque, a figure and genre that originated in 16th century Spain, as vehicles for their explorations of the question of human …

A Machine Learning Approach To Constructing Ramsey Graphs Leads To The Trahtenbrot-Zykov Problem., Emily Hawboldt

Electronic Theses and Dissertations

Attempts at approaching the well-known and difficult problem of constructing Ramsey graphs via machine learning lead to another difficult problem posed by Zykov in 1963 (now commonly referred to as the Trahtenbrot-Zykov problem): For which graphs F does there exist some graph G such that the neighborhood of every vertex in G induces a subgraph isomorphic to F? Chapter 1 provides a brief introduction to graph theory. Chapter 2 introduces Ramsey theory for graphs. Chapter 3 details a reinforcement learning implementation for Ramsey graph construction. The implementation is based on board game software, specifically the AlphaZero program and its …

Addition Of Process Control Experiment To Unit Operations Ii Laboratory., Bradley Esselman

Electronic Theses and Dissertations

Process control is an essential aspect of manufacturing, contributing to improved process safety, efficiency, product consistency, and energy optimization. Chemical engineers are often responsible for ensuring the safe, efficient, and cost-effective operation of industrial processes, and process control plays a pivotal role in accomplishing this.

Chemical engineering students at the University of Louisville complete the course, Elements of Process Control, during the second semester of their fourth year. This lecture-based course offers limited hands-on, practical experience. To supplement the lack of hands-on experience in the classroom, a new process control experiment was designed and implemented into the Unit Operations …

Characterization Of The Immunoglobulin Lambda Chain Across Diverse Human Populations., William Gibson

Electronic Theses and Dissertations

The adaptive immune system relies on a diverse set of over one hundred immunoglobulin (IG) genes across three genomic loci that are variably combined to form antibodies (Ab). The IG Lambda locus is one of two loci which encodes the IG light chain. The complexity of the IGL locus severely limits the effective use of standard short-read sequencing, limiting our knowledge of population diversity in these loci. We leveraged single molecule real-time (SMRT) long-read sequencing in conjunction with IGL-targeted DNA capture to develop the method IG-Cap for accurate and high-throughput sequencing of the IGL locus. We benchmarked this method using …

Novel Insights Into Oligodendrocyte Biology From Developmental Myelination Studies In Autophagy Deficient Mice And Analysis Of Oligodendrocyte Translatome Response To Contusive Spinal Cord Injury., Michael David Forston

Electronic Theses and Dissertations

Loss of myelin causes severe neurological disorders and functional deficits in white matter injuries (WMI) such as traumatic spinal cord injury (SCI). This dissertation is focused on autophagy in OL development and the OL translatome after SCI. Chapter I describes the history of myelin, OL development, and their involvement in neurodegenerative diseases and SCI. The proteostasis network, in particular autophagy, and its contributions to white matter pathology is discussed. It concludes examining advantages and disadvantages of unbiased omics tools, like RiboTag, to study transcriptional/translational landscapes after SCI. Chapter II focuses on autophagy in OPC/OL differentiation, survival, and proper myelination in …

Statistical Inference On Lung Cancer Screening Using The National Lung Screening Trial Data., Farhin Rahman

Electronic Theses and Dissertations

This dissertation consists of three research projects on cancer screening probability modeling. In these projects, the three key modeling parameters (sensitivity, sojourn time, transition density) for cancer screening were estimated, along with the long-term outcomes (including overdiagnosis as one outcome), the optimal screening time/age, the lead time distribution, and the probability of overdiagnosis at the future screening time were simulated to provide a statistical perspective on the effectiveness of cancer screening programs. In the first part of this dissertation, a statistical inference was conducted for male and female smokers using the National Lung Screening Trial (NLST) chest X-ray data. A …

Public Space And Well-Being: An Empirical Study Of Central Park In Old Louisville., Maryam Entezam

Electronic Theses and Dissertations

Urban green spaces have been receiving attention in urban planning and the health profession in the 21^st century as environmental elements that contribute to well-being. This dissertation explored the relationship between green space usage and individuals’ physical, mental, and social well-being. This empirical research focused on Central Park in Old Louisville to examine how residents use the park and whether it contributes to the well-being of residents. After exploring the existing literature, I identified four well-being indices: (1) perceived health (PHI), (2) health outcome (HOI), (3) mental well-being (MWI), and (4) social well-being (SWI). Frequent Park usage is expected …

Age And Paleontology Of The Turin Pit Locality, Monona County, Iowa, Samantha Wright

Electronic Theses and Dissertations

The Turin Pit locality (Monona county, Iowa) has been known to paleontologists since 1908, yet the age of the fauna has been unclear. Early paleontologists considered Turin Pit to date to a pre-Illinoian interglacial (the “Aftonian).” Subsequent researchers suggested it dated to the last glaciation. This study provides a partial list of mammals in the Turin Pit fauna, and together with stratigraphic information, uses the known age ranges of taxa to estimate an age for the assemblage. The presence of Mammuthus, Aenocyon, and Castoroides combined with a magnetically-reversed till located stratigraphically above fossil-bearing deposits, suggest the Turin Pit …

Exploring The Lived Experiences Of Dysphoric Milk Ejection Reflex During Postpartum Breastfeeding: A Phenomenological Study, Stephanie Herr, Jessica Devido, Richard Zoucha, Jill Demirci

Electronic Theses and Dissertations

This study sought to explore the lived experiences of Dysphoric Milk Ejection Reflex (D-MER) during postpartum breastfeeding. A phenomenological method based on Giorgi’s phenomenological underpinnings was used. The setting for this study was virtual interviews in a secure online platform. The sample consisted of 13 participants, self-identifying as experiencing D-MER. Semi-structured interviews, with thematic analysis of transcription were conducted. Four major themes were identified: 1) Breastfeeding concessions and toleration; 2) Something does not feel “normal”; 3) I remember a feeling like this before 4) This is real, and recognition is validating. Conclusions were that women of this study value the …

A Study Of The Perceptions Of Professional Development Programs For K-12 Teachers In Transition, Kimberly S. Alfred

Electronic Theses and Dissertations

The global pandemic of 2020–2021 forced many K-12 schools across the world to require the ability to teach both in a traditional setting and also in a virtual environment. While many leaders thought the transition from traditional to virtual instruction would be easy, it actually proved to be more difficult than first imagined. The purpose of this qualitative descriptive study was to explore how K-12 traditional teachers in Texas describe their professional development experience after moving from a traditional setting to a virtual environment and then back again, pre- and postpandemic. Three research questions guided this study: (a) How do …

Understanding Barriers That Exist To Campus Administrators’ Support For Special Education Programs And How Principals Use Special Education Needs Coordinators As Change Agents, Kevin L. Lanxon

Electronic Theses and Dissertations

Several barriers exist that impact campus administrators’ use of special education needs coordinators (SENCOs) as change agents. Using grounded theory, this study aimed to understand the barriers that exist for campus administrators regarding their ability to support special education programs and how principals use SENCOs as change agents. The study was conducted on a secondary campus with participants engaging in participatory action research (PAR) within a professional learning community. Data was collected using a triangulation of PAR forms, interviews, and reflective journals. While the study focused on understanding the barriers that impact administrators utilizing their SENCOs as campus leaders, the …

The Transformation: Teaching Critical Thinking And Clinical Decision Making In Nursing Education, Winifred Ferguson Adams

Electronic Theses and Dissertations

Abstract

The profession of nursing has recognized in the past 20 years the need for graduate nurses to enter the profession prepared to care for complex medical patients in an ever-changing healthcare environment. It has become a major challenge for nurse educators to provide students with adequate didactic and clinical education in nursing. The overall purpose of this project was to help nurse educators accept the challenge required to make the radical transformation in education. Faculty participated in the measurement of self-efficacy pre and post-exposure to teaching strategies related to (1) critical thinking, (2) clinical judgment, and (3) clinical reasoning …

A Qualitative Content Analysis Of Nigerian Popular Music Genres: A Culture And Heritage Approach To Nation Branding, Cecilia Ashibel

Electronic Theses and Dissertations

This thesis explores the potential of Nigerian popular music as an approach to nation branding. The study employs qualitative content analysis to analyze select Nigerian music genres to examine how Nigeria is portrayed to international audiences and the economic benefits that can be derived from this form of branding. The analysis focuses on narrative themes of “the value of hard work,” “ethnic pride,” “lavish lifestyle,” and the impact of differences which were derived from the data. Findings indicate that Nigeria is globally reckoned for its musical prowess and rich cultural heritage. In highlighting the role of music in Nigeria’s political …

Applications Of Artificial Intelligence To Improve Coastal Ocean Modeling, Dongliang Shen

Electronic Theses and Dissertations

Numerical Modeling (NM) is widely used to simulate and predict hydrodynamic processes and marine particle movements in coastal oceans, particularly during extreme weather events and emergencies. NM offers the capability to realistically simulate multiple state variables and fill gaps caused by scarce observations. However, inherent uncertainties exist in all NMs, primarily arising from the following three factors: 1) insufficient observations leading to uncertain model initial and boundary conditions, 2) inevitable truncation errors due to coarse model resolution, and 3) imperfect physics parameterization schemes for sub-grid processes, especially those related to waves. The consequences of these uncertainties are that 1) even …

Building An Affirmative Lgbtq+ Leadership Paradigm: An Autoethnography., Joshua D. Covington

Electronic Theses and Dissertations

This study is an autoethnography written in the form of layered accounts with a theoretical framework of queer theory. It was based on my journey as an LGBTQ+ individual and educational leader. The purpose of this study was to utilize my experiences as an LGBTQ+ educational leader to investigate the conditions that supported and limited my self-efficacy as an LGBTQ+ educational leader. Furthermore, this study investigated what things my experiences could teach us about building an affirmative LGBTQ+ leadership paradigm. My autoethnography was written as three significant stages of my life. The first stage was my experience with education as …

Principal Supervisor Professional Learning In A Community Of Practice., Jessica Rosenthal

Electronic Theses and Dissertations

Principal supervisor professional learning is an area of educational professionalism that is under-researched and under-developed (Casserly et al., 2013). Because K-12 students deserve to have the best leaders possible impacting their school experience, K-12 principal supervisors need professional learning that strengthens their ability to coach and evaluate K-12 principals (Waters & Marzano, 2006). This study utilized a principal supervisor community of practice as a form of role-specific professional learning. Semi-structured interviews occurring before and after four community of practice convenings along with transcripts from the convenings were used to answer questions that explored principal supervisors’ characterization of a community of …