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 …

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 …

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. …

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 …

Experience Matters: Exploring How Firms Build Dynamic Capabilities Through Execution Of The M&A Transaction Process, Chauntel R. Graves

Electronic Theses and Dissertations

Existing M&A and organizational learning theory research suggests the firm can develop expertise in M&A process execution with each successive M&A transaction experience. The ability to align, assimilate and exploit this learning to build acquisition capability over time aligns with the dynamic capabilities theory. This study inductively explores how the firm learns from previous acquisition experience and continuously improves its M&A process capability. While there are three dimensions of dynamic capabilities, this study focuses on the Sensing dimension – identifying opportunities and threats meeting the demands of an ever-evolving business environment. Experienced M&A professionals suggest essential factors considered consequential to …

Polar Body Membrane Breakdown Occurs Independent Of Macroautophagy In C. Elegans, Shruti Kolli

Electronic Theses and Dissertations

Failure to digest cell corpses can lead to lupus-like autoimmune disorders in mammals. To better understand if LC3-associated phagocytosis (LAP) drives cell corpse breakdown in phagolysosomes, we studied the clearance of the C. elegans polar body during embryonic development. ATG16L1 has separable roles in regulating LC3 recruitment during macroautophagy and LAP. We demonstrated that the ATG16L1 C. elegans orthologs, ATG-16.1 and ATG-16.2, function redundantly to promote polar body membrane breakdown. We also discovered that truncating the LAP-specific WD40 domain of ATG-16.2 unexpectedly disrupts autophagy. Furthermore, we confirmed that polar body membrane breakdown occurs independent of macroautophagy. We also showed that …

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 …

Anxiety As A Compensatory Factor For Executive Functioning Abilities And Later Adhd Symptoms In Youth With Adhd, Rebecca Slomowitz

Electronic Theses and Dissertations

Higher ADHD symptoms have been associated with reduced executive functioning (EF) performance in children. However, an emerging body of research has suggested that in children with higher ADHD symptoms, higher levels of anxiety symptoms may contribute to buffered executive functioning (EF) performance, termed a compensatory interaction. However, results investigating this hypothesis have been mixed, possibly due to the use of smaller sample sizes, cross-sectional datasets, and infrequent testing of compensatory interaction effects between ADHD and anxiety symptoms. The current study expands upon the previous literature by testing for compensatory interactions between anxiety symptoms and ADHD symptoms (e.g., inattention and hyperactive-impulsive …

The Emotional Intelligence And Conflict Management Relationship In Black Women Leaders, Tina Raylyn Jackson

Electronic Theses and Dissertations

This study examined the relationship between emotional intelligence and conflict management styles in Black women leaders in the United States. The lack of literature surrounding Black women leaders' emotional intelligence or conflict management styles presented an opportunity to offer quantitative data connected to these constructs. A cross-sectional survey design was used to administer three surveys the Situational Test of Emotional Management- B, the Kraybill Conflict Style Inventory, and a modified version the Multidimensional Inventory of Black of Identity, that focused on Black female identity. Data from 124 participants were analyzed to learn if identity mediated the relationship between emotional intelligence …

Effects Of Parental Deployment On Military-Connected High School Students And Strategies For Academic Success, Sean T. Lucas

Electronic Theses and Dissertations

Abstract The problem investigated in this study was unknown opportunities that exist for educators to meet the academic needs of students who are affected by combat parental deployment and how this challenge of combat deployment disrupts the family’s dynamic, thus challenging their children academically. The Air Force, Army, Navy, Marines, and Coast Guard made up about 1% of the total United States population in 2015. Most of these people were married, 42% had children, and 54% of their children were in kindergarten to 12th grade. The Department of Defense school system is comprised of 166 accredited schools across 11 foreign …

Insights Into The Structural And Electronic Properties Of 2d Polar Sic/Gec Heterostructures And Asxp1−X Alloys., Kazi Jannatul Tasnim

Electronic Theses and Dissertations

Due to the unique structural and electronic properties along with the practical applications in current and near future, investigations about the group-IV graphene-like two-dimensional (2D) sheets have been accelerated. Among them, 2D SiC and GeC sheets are polar materials with in-plane charge transfer from Si (Ge) to C atoms. An interesting question is how the electrostatic force, triggered by such in-plane charge transfer, plays a role in stabilizing the vertical heterostructures formed by 2D SiC and GeC sheets beyond vdW interaction. To answer this question, we have systematically investigated, in my PhD research projects, the effects of the electrostatic interaction …

Interactive Computer-Based Simulations As Exploratory Learning Activities., Derek Mcclellan

Electronic Theses and Dissertations

Typical college lectures follow a direct instruction framework, where instructors deliver a lecture, followed by an activity. Exploratory learning flips this routine by providing students with an activity prior to instruction. Research suggests that this inversion benefits students’ conceptual understanding and ability to transfer their knowledge. The majority of exploratory learning tasks in the literature are problem-solving activities. The current work investigates the use of computer-based simulations during exploratory learning, and whether manipulating the cognitive load of the activity impacts learning. In Experiment 1, undergraduate students (N=66) were randomly assigned to explore a simulation-based circuit construction activity prior …

“Long Live Ear X-Tacy!”: An Oral History Study Of Rhetorics Of Nostalgia And Place., Aubrie Warner

Electronic Theses and Dissertations

This study aims to explore rhetorical placemaking through how people understand and construct narratives around places that no longer exist. In doing so, it examines the relationship between nostalgia and place — how rhetorical construction of place is influenced and/or informed by rhetorics of nostalgia, how our experiences influence our sense of place (past and present), and how we create continuity for ourselves in the construction and maintenance of particular narratives. This study contributes to the emerging field of rhetorics of nostalgia and places it in direct conversation with rhetorics of place and unpacks how these two are more connected …

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 …

Stability Of Cauchy's Equation On Δ+., Holden Wells

Electronic Theses and Dissertations

The most famous functional equation f(x+y)=f(x)+f(y) known as Cauchy's equation due to its appearance in the seminal analysis text Cours d'Analyse (Cauchy 1821), was used to understand fundamental aspects of the real numbers and the importance of regularity assumptions in mathematical analysis. Since then, the equation has been abstracted and examined in many contexts. One such examination, introduced by Stanislaw Ulam and furthered by Donald Hyers, was that of stability. Hyers demonstrated that Cauchy's equation exhibited stability over Banach Spaces in the following sense: functions that approximately satisfy Cauchy's equation are approximated with the same level of error by functions …

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 …

Why Are Measures Of Depression Imperfectly Correlated? An Empirical Investigation., Eric Joseph Smith

Electronic Theses and Dissertations

Depression remains one of the most prevalent and impactful mental health disorders worldwide. A large number of measures of depressive symptoms are currently available, all designed to assess the same underlying construct. However, the measures tend not to correlate highly with one another. Measurement error cannot fully account for this observation, suggesting that clinical heterogeneity – that is, differences in symptom coverage across measures – might contribute to the lower-than-expected correlation between measures. We conducted two concurrent studies to examine this hypothesis. In Study 1, we developed a coding scheme to categorize items into one of 10 symptom categories. We …

Novel Breath Collection Techniques For Detection Of Covid-19., James Morris

Electronic Theses and Dissertations

Volatile Organic Compounds (VOC) generated endogenously in the human body can be used to detect diseases that induce oxidative stress and inflammation. Breath analysis has been used for the detection of diseases such as COPD, Depression, Lung Cancer and most recently COVID-19. Methods such as Exhaled Breath Condensate (EBC), Sorbent Tubes, Solid Phase Microextraction (SPME), and silicon microreactors have shown considerable capability in extracting and concentrating trace VOC’s present in human breath. Silicon microreactors functionalized with capture agents to derivatize carbonyl compounds are effective but the overall maximum flow rate of breath sample possible during analysis is low, making direct …

Clinical And Environmental Factors Affecting The Survival Outcomes Among Stage 1a Tn0m0 First Primary Non-Small Cell Lung Carcinoma Patients In The United States., Naiya Patel

Electronic Theses and Dissertations

Background: Lung cancer is the second leading cause of death in the United States (U.S.). The most prevalent histological type of lung cancer is Non-Small Cell Lung Cancer (NSCLC), which has an overall five years survival of 5% if left untreated. Therefore, early treatment of NSCLC is vital to improve overall survival (OS) outcomes. Several factors affect survival outcomes, which can be categorized as modifiable or non-modifiable. The difference in timely receipt of guideline-concordant treatment affects the survival outcomes of patients with stage 1A NSCLC. This dissertation explored factors that affect treatment and survival outcomes among stage 1A NSCLC patients …

Statistical Methods For Assessing Treatment Effects On Ordinal Outcomes And Selecting Optimal Treatment On Survival Outcomes Using Observational Data., Huirong Hu

Electronic Theses and Dissertations

This dissertation consists of two projects investigating statistical methods in causal inference and personalized medication using observational data. In the first project, we propose a parametric marginal structural ordinal logistic regression model (MS-OLRM) to assess treatment effects on ordinal outcomes. Average treatment effect (ATE) is used to measure the difference of the mean outcomes if all patients would have been treated compared with the outcomes if they would not have been treated. Many statistical methods have been developed to estimate ATE when the outcome is continuous or binary. The methodology on assessing treatment effect for an ordinal outcome is less …

Teachers And Administrators' Perceptions Of The Implementation Of District Student Conduct Procedures., Amy Ghibaudy

Electronic Theses and Dissertations

While there is a body of research about student conduct policies and procedures, there is a lack of research about how different role groups work together to implement these procedures and have a positive working interpersonal relationship. This sequential mixed methods case study design takes place in a large urban school district. In this study, I investigate the perceptions that educators have on the implementation of student conduct procedures in their school. I also explore how their perceptions of each other shape their interpersonal relationships. I used Normalization Process Theory (NPT) as my guiding theoretical framework. This study drew upon …

Illuminating Underappreciated Mechanisms Of Receptor Regulation In Human Lymphocytes., Cassandra Woolley

Electronic Theses and Dissertations

A thorough understanding of receptor regulation is imperative to predict expression in varying contexts of disease or treatment. Lymphocyte surface receptors are often used as biomarkers and drug targets, making them particularly important for study. For receptors of debated functionality, such as the Fc receptor for IgM (FcMR), understanding regulation can also help to predict expression in vivo to supplement hypotheses of biological roles. Various mechanisms exist for altering receptor surface expression, including direct feedback mechanisms such as ligand-induced endocytosis and broader mechanisms such as transcriptional and translational control. In this dissertation, we explore selected underappreciated mechanisms of lymphocyte receptor …

Perceptions Of Preparedness Regarding Administrative Responsibilities: A Comparative Analysis Of Preservice And In-Service Secondary Music Educators., Ashley Ann Hokenson

Electronic Theses and Dissertations

This study investigated perceptions of knowledge and preparation regarding administrative responsibilities among in-service and preservice music teachers. Samples were selected randomly through NAfME and NASM databases. Data collection and analysis answered research questions asking how knowledgeable these groups felt about administrative topics, how they felt their undergraduate coursework prepared them for administrative responsibilities, and if there were any significant differences in preparedness among different subject areas taught by in-service directors. The findings report in-service teachers felt more knowledgeable of all administrative topics. Among in-service and preservice teachers, one significant difference was found; regarding preparedness pertaining to laws of communication via …

Fbg Αc 389 – 402 Modulates Factor Xiii Crosslinking In The Fibrinogen Αc Region., Francis Dean Orlina Ablan

Electronic Theses and Dissertations

Fibrinogen (Fbg) is a coagulation protein critical for clot formation. Coagulation Factor XIII (FXIII) is a calcium-dependent transglutaminase that crosslinks reactive glutamines (Q) and lysines (K) between fibrin and other anti-fibrinolytic proteins. In the presence of Ca²⁺, FXIII could be activated non-proteolytically (FXIII-A°), or proteolytically by thrombin (FXIII-A*). Significant increases in clot stability and red blood cell retention are linked to FXIII activity in the fibrinogen αC region (Fbg Aα 221 – 610). This region contains several FXIII-reactive glutamines and lysines, as well as a binding site for FXIII-A* (Fbg αC 389 – 402) that includes a key …

The Influence Of Power On Racial Identity And Social Power: Learning While A Minority In A Bullitt County High School In Kentucky., Michele Johnson

Electronic Theses and Dissertations

The purpose of this phenomenological study is to examine the influence of power on racial identity and social awareness of minority high schools’ students in Bullitt County, Kentucky. The research will come from the student perspective of those attending high school with students predominantly from another racial background. Using purposeful sampling, 12 students participated in semi-structured interviews, providing insight into three research questions regarding racial identity, social power, and social awareness. Student participants used their voice to share their lived educational experiences attending school with students from another racial background. Interviews were transcribed, coded and analyzed using In Vivo and …

Evaluating Chatgpt For Recommendation: How Does The Ability To Converse Impact Recommendation?, Kyle Spurlock

Electronic Theses and Dissertations

Recommendation algorithms have become an absolute necessity in the modern world to avoid information overload. However, the interaction between the human and the system is largely superficial and without any real contact. If you are given poor recommendations, you have no choice but to sift through mountains of content on your own until the model learns to accommodate your tastes more. This is bad for business as well as the consumer. Recently, large language models like ChatGPT have seen a significant rise in popularity due to their ease of use and wide range of knowledge. It has now become nearly …

Development And Applications Of Novel And Practical Fluorination Reagents., Yuhao Yang

Electronic Theses and Dissertations

The fluorine (F) atom has distinctive properties such as the highest electronegativity, small size, low polarizability, and strong C–F bond strength. Not surprisingly, fluorinated organic compounds have garnered significant attention in the pharmaceutical, agrochemical, and material fields. Since organofluorides are very rare in nature, we need fluorination reagents to help us transfer fluorine into the organic molecules. In past decades, a vast number of fluorination reagents have been developed and many of them are commercially available now. However, there is still much room for the improvement of these reagents. Our target is to develop novel and practical fluorination reagents to …

Ocean Wave-Coherent Temperature And Humidity Near-Surface Vertical Distributions And Their Effect On Radar Performance Over The Ocean, Mathew James Stanek

Electronic Theses and Dissertations

Large knowledge gaps concerning the effect of ocean surface waves on near-surface vertical distributions of temperature and humidity in the marine atmospheric surface layer exist due to practical limitations and sensor fidelity challenges of direct measurements. Wave effects on these distributions between the wave trough and crest are least studied within the literature. These scalar distributions influence atmospheric refractivity, which can lead to anomalous propagation of electromagnetic energy. Measurements of temperature and humidity are classically made using rocket- or radiosondes and fixed weather stations, and can utilize tethered profiling systems. However, these measurement systems have limitations when obtaining measurements near …

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 …