Digital Commons Network^™

Data-Enabled Distribution Grid Management, Zohreh Sadat Hosseini

Electronic Theses and Dissertations

In 2020, U.S. electric utilities installed more than 94 million advanced meters, which brought the percentage of residential customers equipped with smart meters to 75%. This significant investment allows collecting extensive customer data at the distribution level, however, the data are not currently leveraged effectively to help with system operations. This dissertation aims to use the smart meters’ data to improve the grid’s reliability, stability, and controllability by solving two of the most challenging problems at the distribution level, namely distribution network phase identification and outage identification.

Distribution networks have typically been the least observable and most dynamic and locally …

The Role Of Ehd2 In Endothelial Cells, Rachael Judson

Electronic Theses and Dissertations

The role of EHD2 in terms of Cav1 interaction had not been previously characterized and was the main goal of this research. Cav1 has been shown to lead to the ubiquitination of Rac1. Because of this, the role of EHD2 in Rac1 regulation was investigated. An increase in long-term migration in endothelial cells was observed and suggested that EHD2 impacts the RhoA pathway instead of the Rac1 pathway. This lead to the hypothesis that EHD2 controls a part of the RhoA pathway. This hypothesis is supported by the loss of filamentous actin and an increase in serrated junctions in cells …

Estimation Of Treatment Effects With Multilevel Observational Data Using Deep Neural Networks, Logistic Regression, And Multilevel Modeling: A Propensity Score Approach, Neba Nfonsang

Electronic Theses and Dissertations

This study used a propensity score approach to estimate treatment effects in a multilevel setting. The propensity score approach involves the estimation of propensity scores for covariate balancing and the estimation of treatment effects. This study aimed at understanding how propensity scores estimated through a simple logistic regression compare with propensity scores estimated through an optimized deep neural networks model. The study also examined how treatment effects estimated with propensity score weights from logistic regression compare with treatment effects estimated with propensity score weights from deep neural networks.

Few causal studies have been conducted in a multi-level setting with observational …

On Loop Commutators, Quaternionic Automorphic Loops, And Related Topics, Mariah Kathleen Barnes

Electronic Theses and Dissertations

This dissertation deals with three topics inside loop and quasigroup theory. First, as a continuation of the project started by David Stanovský and Petr Vojtĕchovský, we study the commutator of congruences defined by Freese and McKenzie in order to create a more pleasing, equivalent definition of the commutator inside of loops. Moreover, we show that the commutator can be characterized by the generators of the inner mapping group of the loop. We then translate these results to characterize the commutator of two normal subloops of any loop.

Second, we study automorphic loops with the desire to find more examples of …

Going Backstage: Examining Justice Perceptions Of Electronic Performance Monitoring, Maurice Harris

Electronic Theses and Dissertations

Organizations are rapidly adopting emerging technologies, popularly known in the media as “bossware,” that track the behaviors of employees. The use of these technologies to monitor worker performance is known as electronic performance monitoring (EPM) in the academic literature. EPM systems increasingly utilize advanced algorithms, equipping companies with the capabilities to expose employees' actions, thoughts, and feelings. Prior research on EPM has focused mainly on the reactions of front-line workers, ignoring the perceptions of employees who work at different hierarchical levels within their organizations. An organizational justice perspective is used to examine how a company’s decision to grant employees the …

Characterization Of Cyclopropyl Synthases Involved In The Maturation Of Ribosomally Synthesized And Posttranslationally Modified Peptides, Yi Lien

Electronic Theses and Dissertations

Ribosomally synthesized and post-translationally modified peptides (RiPPs) are a large class of natural products with significant human health implications. RiPPs are synthesized from a genetically encoded precursor peptide that undergoes significant modifications by maturing enzymes, or maturases. Recently, radical-S-adenosylmethionine (rSAM) enzymes have emerged as an important family of RiPP maturases. rSAM enzymes have been shown to install ether, thioether, and carbon-carbon bonds on the precursor peptide. These modifications usually define the backbone structure of the mature RiPP. This thesis describes the characterization of a novel RiPP modification catalyzed by the radical S-adenosylmethionine enzyme TigE. TigE belongs to the TIG biosynthetic …

Paving Pathways For Success: The Role Of Transition Models And Disability Services In Postsecondary Education For Students With Disabilities, Jillian Talley

Electronic Theses and Dissertations

Students have dreams and goals outside of school. School psychologists can play a vital role in helping students with disabilities reach their dreams, particularly when the dreams ask the question “What do I want to do after high school?” Often, the answer lies in postsecondary goals, which require transition planning while the student is still in school. Manuscript One (M1) explores how families, teachers and school psychologists can all play supportive and distinct roles in helping a student with disabilities reach their postsecondary goals. There have been several transition models proposed to help students with disabilities shift from PK-12 to …

Examining The Credibility Of Story-Based Causal Methodologies, Megan E. Kauffmann

Electronic Theses and Dissertations

The purpose of this study was to explore how evaluators justify using story-based methodologies when examining causality. The two primary research questions of the study included: 1) what arguments are made by evaluators to justify the credibility of story-based causal methodologies to evaluation stakeholders; and 2) from the perspective of evaluators, how do contextual factors influence whether story-based causal methodologies are perceived as credible by evaluation stakeholders? A case study was conducted to examine the cases of four evaluators who had experience implementing a story-based methodology in an evaluation. Data collection procedures included two interviews with each participant and a …

Exploring The Lives Of Parents Of Traditionally Marginalized Gifted Students, Lora Romero

Electronic Theses and Dissertations

The purpose of this study was to examine the lived parenting experiences of traditionally marginalized gifted students within the educational setting and at home. For this study, the researcher gathered information from seven parents of traditionally marginalized gifted students and told their stories. Since the families are traditionally marginalized the population consisted of those who have high intelligence and are a part of a historically oppressed racial/ethnic group. The study was developed using the lens of the Critical Race Theory (CRT). Through the CRT, Capper (2015), recognized that many schools analyze the function of race but lack the knowhow of …

Could Alexa Increase Your Social Worth?, Peter Tripp

Electronic Theses and Dissertations

People have historically used personal introductions to build social capital, which is the foundation of career networking and is perhaps the most effective way to advance a career (Lin, 2001). With societal changes, such as the pandemic (Venkatesh & Edirappuli, 2020), and the increasing capabilities of Artificial Intelligence (AI), new approaches may emerge that impact societal relationships. Social capital theory highlights the need for reciprocal agreements to establish the trust between parties (Gouldner, 1960). My theoretical prediction and focus of this research include two principles: The impact of reciprocity in evaluating trust of the source of the introduction and the …

Gifted Female Voices: Perceptions Of Differentiation In Secondary And Higher Education, Ann Makikalli

Electronic Theses and Dissertations

While the advocacy of differentiation as best pedagogical practices for instruction of gifted students can be found in scholarly literature, minimal research attention has been given to high-ability students’ perceptions about their lived classroom experiences. Lack of challenging and accelerated content for identified gifted students can lead to boredom, negative self-perception, and disengagement from school. Gifted adolescent females, who are less likely to address barriers to realizing their potential can especially suffer or thrive depending on curriculum. The purpose of this qualitative study is to describe identified female gifted university students’ perceptions of pre-collegiate and collegiate differentiation of curriculum and …

Improving Quantification Of Mitral Regurgitation Through Computational Fluid Dynamics And Ex Vivo Testing, Alexandra Flowers

Electronic Theses and Dissertations

Mitral regurgitation (MR) is a prominent cardiac disease affecting more than two million people in the United States alone. In order for patients to receive proper therapy, regurgitant volume must first be quantified. As there are an array of methods to do so, the proximal isovelocity surface area (PISA) method continues to be the most accurate and clinically used method. However, there are some difficulties obtaining the necessary measurements need for this when performing transthoracic echocardiography. This study aims to evaluate and present techniques that may be used to more accurately quantify regurgitation through ex vivo testing and computational fluid …

Perceptions Of Parental Care And Overprotection In Childhood: Influences On The Neurobiological Adaptation To Motherhood, Leah Grande

Electronic Theses and Dissertations

Recalled memories of caregiving in childhood are especially salient during the postpartum period and inform mothers’ conceptualization of her new parenting role. Positive perceptions of care received from one’s parents are related to improved maternal-infant bonding and positive parenting behaviors, whereas negative perceptions of care convey risk for maladaptive parenting. Few studies have investigated neural and biological mechanisms contributing to observed associations between childhood care and the adaptation to motherhood. The following studies address this gap by examining how perceptions of childhood parental care and overprotection are related to maternal behavior, oxytocin levels, and neural response. Methods: Perceived childhood maternal …

Care Infrastructure Accessibility And The Gender Wage Gap – A Way To Improve Women’S Ability To Equitably Engage In The Paid Labor Market?, Julia Schinnenburg

Electronic Theses and Dissertations

World-wide, women are less integrated into the labor force than men and if they are, they earn considerably less on average. This unequal treatment of women results in negative consequences for all members of society, as it harms women’s financial realities and also affects women’s care receivers due to a lack of resources that women can spend on their care giving. The research presented analyses how much the institution of better accessible care infrastructure could improve women’s ability to work for pay and decrease their daily workloads. The extent to which improved care infrastructure accessibility affects women’s lives is determined …

A Water-Surface Self-Leveling Landing Platform For Small-Scale Uavs, Mbidi Santos

Electronic Theses and Dissertations

Because many of the most widely used UAVs, such as the Vertical Take-Off and Landing (VTOL), cannot land securely on sloped or fast-changing surfaces, there is a need to design better deployment and landing stations. This document proposes an approach to design a water-surface self-leveling landing platform by implementing the best concept to be used as a safe ground for UAVs to land and deploy on open waters. After conceptualizing multiple design ideas, these options were laid out in a decision matrix with four criteria: degrees of freedom, mechanical complexity, manufacturing, and cost. The chosen concept was the spherical parallel …

Classification Of Electropherograms Using Machine Learning For Parkinson’S Disease, Soroush Dehghan

Electronic Theses and Dissertations

Parkinson’s disease (PD) is a neurodegenerative movement disorder that progresses gradually over time. The onset of symptoms in people who are suffering from PD can vary from case to case, and it depends on the progression of the disease in each patient. The PD symptoms gradually develop and exacerbate the patient’s movements throughout time. An early diagnosis of PD could improve the outcomes of treatments and could potentially delay the progression of this disorder and that makes discovering a new diagnostic method valuable. In this study, I investigate the feasibility of using a machine learning (ML) approach to classify PD …

The Dual Role Of A Teacher And Teacher Leader: An Auto-Educational Criticism Examination, Joseph Bolz

Electronic Theses and Dissertations

The world of teaching has long been explored: from works focused on different contents to different grade bands to different techniques and methods to best practices, the literature is dense with materials on the world of teaching. Where this literature has just begun to shed light however is the world teacher leadership. As an educator in a dual role since 2014, that of a teacher and a teacher leader, I have beared witness to what current research has only recently begun to unearth.

It is here that I situate myself, as the researcher of teacher leadership and the subject of …

"What Works For Whom" In Family Support Programs: Leveraging Administrative Data To Improve Precision Matching, Elly M. Miles

Electronic Theses and Dissertations

Family support programs (FSPs) are designed to stabilize and strengthen families on a range of outcomes to promote well-being. Paradoxically, families with the greatest need are more likely to drop out or experience reduced benefit on average. This study examines patterns of differential benefit for families experiencing elevated stress through a cross-program evaluation of “what works for whom” in FSPs.

Family Resource Center Family Development Services (FDSs), Colorado Community Response (CCR), Promoting Safe and Stable Families (PSSF), Head Start (HS), and SafeCare Case Management Pilot (Safe CMP) contributed data on 15,771 participants enrolled in services from 2014-2020. Program samples were …

Socioeconomic Factors And Mass Shootings, 1982-2016, Taylor Petkovich

Electronic Theses and Dissertations

This paper is an examination and investigation of the relationship between socioeconomic factors and mass shootings. The objective of this paper was to see if economic policy making could be an effective tool for reducing the level of mass gun violence that America has been experiencing. This paper highlights the known relationship between violent crime and economics and tries to bridge that connection to mass shootings specifically through literature review and econometric testing. The ultimate takeaway from this paper’s results and analysis is the need for a universal definition and governing body for data on mass shootings in order to …

Frequency Analysis Of Trabecular Bone Structure, Daniel Parada San Martin

Electronic Theses and Dissertations

Medical data is hard to obtain due to privacy laws making research difficult. Many databases of medical data have been compiled over the years and are available to the scientific community. These databases are not comprehensive and lack many clinical conditions. Certain type of medical conditions are rare, making them harder to obtain, or are not present at all in the aforementioned databases. Due to the sparsity or complete lack of data regarding certain conditions, research has stifled. Recent developments in machine learning and generative neural networks have made it possible to generate realistic data that can overcome the lack …

Humanizing Computational Literature Analysis Through Art-Based Visualizations, Alexandria Leto

Electronic Theses and Dissertations

Inequalities in gender representation and characterization in fictional works are issues that have long been discussed by social scientists. This work addresses these inequalities with two interrelated components. First, it contributes a sentiment and word frequency analysis task focused on gender-specific nouns and pronouns in 15,000 fictional works taken from the online library, Project Gutenberg. This analysis allows for both quantifying and offering further insight on the nature of this disparity in gender representation. Then, the outcomes of the analysis are harnessed to explore novel data visualization formats using computational and studio art techniques. Our results call attention to the …

Local-Global Results On Discrete Structures, Alexander Lewis Stevens

Electronic Theses and Dissertations

Local-global arguments, or those which glean global insights from local information, are central ideas in many areas of mathematics and computer science. For instance, in computer science a greedy algorithm makes locally optimal choices that are guaranteed to be consistent with a globally optimal solution. On the mathematical end, global information on Riemannian manifolds is often implied by (local) curvature lower bounds. Discrete notions of graph curvature have recently emerged, allowing ideas pioneered in Riemannian geometry to be extended to the discrete setting. Bakry- Émery curvature has been one such successful notion of curvature. In this thesis we use combinatorial …

Music Theory Pedagogy For The Violin: Cognitive Philosophy And Three Model Curricula, Morganne J. Mcintyre

Electronic Theses and Dissertations

Violin playing promotes a connection between mind and body that allows the performer to internalize, or embody, tactile features of the instrument, such as the distance between strings, the feeling of the fingertips on the fingerboard, the interval size between notes, and many other aspects. This thesis designs a pedagogy that employs the violin’s physical attributes to provide the beginning through advanced player with a deeper understanding of music theory. The thesis suggests pairing of physical learning and musical theory at each stage of a violinist’s musical education. Chapter 1 surveys embodied cognition and cognitive artifacts. Chapter 2 applies these …

Metaphors As Tools Of Translation In The Early Medieval English Pedagogical Tradition, Abigayil M. Wernsman

Electronic Theses and Dissertations

This dissertation examines three crucial texts written and translated from Latin into Old English between 800CE and 1010CE in medieval England by King Alfred, Bishop Æthelwold, and Abbot Ælfric. These texts are crafted to further political and educational power, reform, and change. It argues that the metaphors wielded within these pedagogical texts were essential to the cultivation of authority for kings and magisters, and the propagation of English as a written language. Utilizing the framework of conceptual metaphor with attention to the historicity surrounding each text, I examine the definitions of metaphor and of translation to argue that each text …

Where Virtual Well-Being Becomes Reality, Colleen M. Reilly

Electronic Theses and Dissertations

Strategies to mitigate the spread of COVID-19, specifically quarantine and social distancing protocols, have exposed a troubling paradox: mandated isolation meant to save lives has inadvertently contributed to a decline in America’s well-being. Prolonged isolation due to more remote work and decentralized workplaces has been associated with widespread loneliness and diminished physical and mental health, with effects compounded by limited face-to-face access to social support systems. While remote communication technologies (e.g., video chat) can connect individuals with colleagues and social networks, remote technologies might have limited effectiveness in business and social contexts. This study uses Roger’s Diffusion of Innovation Theory …

Geovisualization And Open-Source Web Mapping Of Big Origin-Destination Data, A Test Case, Joseph Hiebert

Electronic Theses and Dissertations

Migration plays a key role in determining the health and success of cities, counties, and countries. It also plays a key role in determining the health and wellbeing of the individuals and families that undergo a migration event. This has led many scholars to map and study global migration patterns to understand how and why people move. While migration data are powerful, the origin-destination (O-D), tabular format of the data can be hard to interpret. To make O-D data more powerful, geographers can lean on computer cartography and new geovisualization techniques to help decision makers make sense of large, complex …

Mis-Specification Of Functional Forms In Growth Mixture Modeling: A Monte Carlo Simulation, Richa Ghevarghese

Electronic Theses and Dissertations

Growth mixture modeling (GMM) is a methodological tool used to represent heterogeneity in longitudinal datasets through the identification of unobserved subgroups following qualitatively and quantitatively distinct trajectories in a population. These growth trajectories or functional forms are informed by the underlying developmental theory, are distinct to each subgroup, and form the core assumptions of the model. Therefore, the accuracy of the assumed functional forms of growth strongly influences substantive research and theories of growth. While there is evidence of mis-specified functional forms of growth in GMM literature, the weight of this violation has been largely overlooked. Current solutions to circumvent …

Measurements Of Atmospheric Radicals, Heather L. Runberg

Electronic Theses and Dissertations

Atmospheric particulate matter (PM) is a global health concern. PM_2.5 is formed primarily through combustion processes such as automobile use and industrial activity. Natural sources of PM_2.5 result from events like volcanos and wildfires. Upon inhalation, PM_2.5 is small enough to travel deep into the lungs where it can form reactive oxygen species (ROS), such as hydroxyl radical (OH), causing oxidative damage to pulmonary tissues. PM_2.5 has been linked to cardiopulmonary diseases such as asthma, chronic obstructive pulmonary disease (COPD), and high blood pressure.

PM_2.5 is small enough to remain aloft and travel many hundreds …

Monitoring Of State Transitions In Extreme Environment Application Materials Using Fiber Bragg Grating Sensors, Sabuj Khadka

Electronic Theses and Dissertations

By embedding both a single fiber Bragg grating (FBG) sensor and a thermocouple (TC) during the manufacturing for extreme environment applications of certain classes of materials such as metals and polymers, a novel in-situ approach was developed to precisely monitor their entire manufacturing processes. This novel monitoring technique was able to identify many characteristic points during the curing of room and high-temperature epoxies and the solidification processes of metal alloys composed of tin and bismuth which were selected in this research purely for verification purposes. Some of the characteristic points identified for the epoxies were: (i) the gel point, (ii) …

The Intersection Of Traumatic Brain Injury And Homelessness, Stephanie A. Chassman

Electronic Theses and Dissertations

The rates of TBI are significantly higher among individuals experiencing homelessness compared to the general population. Up to half of individuals experiencing homelessness may have a TBI. Accurate prevalence rates of TBI among individuals experiencing homelessness are difficult to obtain due to different methods of sampling participants and differing definitions of TBI; therefore, estimates may be underrepresented. Despite past research that has examined the relationship between TBI and homelessness, there are specific gaps in knowledge such as correlates and risk factors of TBI among individuals experiencing homelessness. This three-manuscript dissertation attempts to address these gaps in knowledge.

The first manuscript …