295 Works

Research on Power System State Estimation Problems – Series-Compensated Transmission Line Parameter and Load Model Parameter Estimation

Yiqi Zhang
Transmission line and load model parameters are essential inputs to power system modeling and simulation, control, protection, operation, optimization, and planning. These parameters usually vary over time or under different operating conditions. Thus, reliable estimation methods are desired to ensure the accuracy of those parameters. This research focuses on estimation for transmission line parameters and the ZIP load model. The proposed estimation methods can use both online measurements and historical data of a specified duration....

MULTIPLE PROTEINOPATHIES AND THEIR ROLE IN COGNITIVE IMPAIRMENT AND NEURODEGENERATIVE DISEASES

Shama Karanth
Most age-related neurodegenerative disorders are associated with the aggregation of misfolded and aberrant proteins. Alzheimer’s disease (AD) is one of the most common neurodegenerative disorders and is highly prevalent in older adults. Neuropathologically, AD is characterized by the accumulation of amyloid-β (Aβ) plaques and neurofibrillary tangles (NFTs). Other misfolded proteins, including α-synuclein and transactive response DNA-binding protein 43 (TDP-43), are also commonly observed in aged brains. Aberrant α-synuclein has been associated with Parkinson's disease, Dementia...

Novel Methods for Characterizing Conditional Quantiles in Zero-Inflated Count Regression Models

Xuan Shi
Despite its popularity in diverse disciplines, quantile regression methods are primarily designed for the continuous response setting and cannot be directly applied to the discrete (or count) response setting. There can also be challenges when modeling count responses, such as the presence of excess zero counts, formally known as zero-inflation. To address the aforementioned challenges, we propose a comprehensive model-aware strategy that synthesizes quantile regression methods with estimation of zero-inflated count regression models. Various competing...

Beyond the Notation

Brent Johnson
Music is a subjective art form that is enhanced by emotional connection and understanding of the relationship of line and phrasing to both the performer and the audience. Performers and conductors are charged with making artistic decisions about the expressive qualities of a phrase within moments of seeing the notation for the first time. In the development of wind ensembles, there is often a disconnect between the technique and accuracy of a musician’s performance and...

A MUSICAL ANALYSIS OF WILLIAM GRANT STILL'S SONGS OF SEPARATION

Michael Preacely
William Grant Still was given the title “The Dean of African American Music” because of the many firsts he accomplished as an African American musician in the early twentieth century. He is known for fusing his African American musical tradition of Jazz and blues with the classical European musical tradition. This study explores one of Still’s most famous song cycles, “Songs of Separation,” in the arrangement for string quartet, voice, and piano. This document considers...

Race Youth in Twentieth-Century American Literature and Culture

Claire Lenviel
Race Youth in Twentieth-Century American Literature and Culture argues for the centrality of black youth, both real and literary, to the trajectories of African American literature and its repudiation of white supremacy. Drawing on research into the rise of the adolescent and teenager as distinct social categories, I argue that age-based subjectivity should inform how we read race-based subjectivity. My first chapter explores how early twentieth-century black periodicals push back against white supremacist theories of...

Teacher Perception of a Comprehensive School Physical Activity Program (CSPAP) and Its Effects on Student on-task Behavior

Jason Wilson
The purpose of this instrumental case study was to examine how a Comprehensive School Physical Activity Program (CSPAP) affects student on-task behavior, disciplinary referrals, as well as teachers’ perception of the CSPAP’s effect on student on-task behavior. Specifically, the impacts that doubling recess time and daily physical education (PE) at the study school site had on student on-task behavior was examined. Three research questions were examined, and each question contained sub-questions: 1) What is the...

THE CONSENT OF MAN

Will Silberman
The problem of privacy is nuanced, pervasive, and requires an elevated approach. Given the lack of consistency with regard to privacy’s conceptualization and operationalization, research is needed that examines variables related to privacy to better understand how privacy operates in the present day. This dissertation aims to better understand nuances of privacy by gauging knowledge of online privacy, technological affordances related to privacy, and knowledge of surveillance. In this study, human subjects from a large...

Captivating State

Diana Hatchett
This dissertation examines how Kurdistani young people experience contests of values in a state shaped by sectarian political cultures during a time of trial and transition for the Kurdistan Region of Iraq (KRI). The dissertation is based on approximately 20 months of ethnographic fieldwork (September 2015 - June 2017) spent among Kurdistani youth, broadly defined as 12 to 30 years old, in secondary schools and fitness centers. The ethnography presents interlocutors as co-theorists in conceptualizing...

Rad Modulation of the L-type Calcium Channel Confers Systolic Advantage in the Heart

Brooke Ahern
Heart failure is a major public health problem and a leading cause of mortality. This clinical condition affects populations of all ages, and is the result of various cardiomyopathies. Almost half of these patients suffer specifically from heart failure with reduced ejection fraction; these hearts have decreased performance due to a failure of the heart to contract with sufficient force to meet demand. While there are therapies available to increase contractility, none of these enhance...

DEVELOPMENT OF AN AUTONOMOUS NAVIGATION SYSTEM FOR THE SHUTTLE CAR IN UNDERGROUND ROOM & PILLAR COAL MINES

Vasileios Androulakis
In recent years, autonomous solutions in the multi-disciplinary field of the mining engineering have been an extremely popular applied research topic. The growing demand for mineral supplies combined with the steady decline in the available surface reserves has driven the mining industry to mine deeper underground deposits. These deposits are difficult to access, and the environment may be hazardous to mine personnel (e.g., increased heat, difficult ventilation conditions, etc.). Moreover, current mining methods expose the...

The Smallest Solution of an Isotropic Quadratic Form

Deborah Blevins
An isotropic quadratic form f(x1,...,xn) = ∑ ni=1 ∑ nj=1 fijxixj defined on a Z- lattice has a smallest solution, where the size of the solution is measured using the infinity norm (∥ ∥∞), the l1 norm (∥ ∥1), or the Euclidean norm (∥ ∥2). Much work has been done to find the least upper bound and greatest lower bound on the smallest solution, beginning with Cassels in the mid-1950’s. Defining F := (f11,...,f1n,f21,...,f2n,...,fn1,...,fnn), upper...

NOVEL TOOLS FOR ANALYSIS OF DISORDERED SLEEP AND MOTOR BEHAVIOR IN PRECLINICAL MODELS OF DISEASE

Dillon M. Huffman
Subtle changes in sleep architecture can accompany and be symptomatic of various diseases or disorders. Understanding the complex interactions between sleep and health requires the ability to characterize sleep, probe its underlying mechanisms through perturbation, and quantify dependent physiological outcomes. Rodent models have come to be accepted as a valuable tool for preclinical investigations. However, experimental tools to accomplish such research typically rely on laborious methods that limit throughput and flexibility. Thus, research tools that...

Biomechanics of the Lower Back During Repetitive Deadlifts, with and without Body Armor

Vanessa Ramirez
Background: Low back pain is a significant problem and one of the primary musculoskeletal-related conditions affecting active-duty service members [1]. Since more than two-thirds of U.S. soldier occupational tasks involve lifting from floor level to waist height [2], increasing individual lifting capacity is strongly correlated with performance with these tasks [3]. Training for the first Army Combat Fitness Test event (3RM deadlift) to improve lifting capacity directly relates to performing carrying/lifting military tasks. One training...

Examination of Sex- and Intensity-Specific Fatigue During Bilateral Leg Extension Exercise

Taylor Dinyer
The purposes of this study were to: 1) examine sex-related differences in the performance of repetitions to failure below (CL-10%, CL-20%) and above (50%, 60%, 70%, and 80% 1RM) the critical load (CL) to make inferences regarding the mechanisms responsible for variability in the performance of repetitions to failure at varying loads; 2) examine the time course of neuromuscular and muscle oxygen saturation responses during the performance of repetitions to failure below and above the...

Earnings Conference Calls and Lazy Prices

Chuancai Zhang
Changes to the language and construction of financial reports are indicative of firms’ future returns and operations. Investors, however, are often inattentive to these changes; consequently, price reactions to these changes are delayed—resulting in “lazy” prices. This study explores two possible channels through which earnings conference calls may mitigate lazy prices: (1) the topic overlap channel and (2) the comparison language channel. Specifically, I examine whether the topic overlap between conference call transcripts and 10K/10Q...

Beyond the Treatment Protocol

Maria Bane
Despite the growing body of research demonstrating voice therapy efficacy, only 12 of 100 people referred to a speech-language pathologist (SLP) for a voice evaluation will successfully complete therapy. One possible reason for this discrepancy is that clinical laboratory and clinical outcomes studies have focused on if voice therapy works while failing to explain how voice therapy works. While the if question is important, the yes or no response this question generates is of limited...

Factors Influencing Mare Milk and Foal Gastrointestinal Health

Morgan Brewer Pyles
Foals are born lacking a functional microbial community in their gastrointestinal tract (GIT). However, these microbes quickly colonize after birth. Factors influencing the process of microbial colonization and health of the foal’s gastrointestinal tract, such as milk yield and composition, are not well understood. Milk contains non-lactose carbohydrates termed “oligosaccharides”, which serve as prebiotics in human neonates and may serve a similar function in foals. Three animal studies were conducted to evaluate factors influencing mare...

Adverse Childhood Experience and Undergraduate Student Success

Sarah E. Cprek
Institutions of higher education have long worked to understand factors that influence or predict student success and degree completion. Childhood experiences including potential exposure to toxic stress have been found to impact student success in K-12 schools yet have rarely been evaluated among undergraduates. Therefore, the purpose of this study is to investigate the relationship between Adverse Childhood Experiences (ACEs) and undergraduate degree completion among a random sample of 1,894 students at a state-funded university...

MAGNETIZATION DYNAMICS IN KAGOME ARTIFICIAL SPIN ICE CONSIDERING THE EFFECT OF VERTEX AND GEOMETRICAL LATTICE DISTORTION

Ali Frotanpour
Artificial spin ices (ASI) have been shown to exhibit dynamic magnetic responses that are dramatically different from plane magnetic thin films. A number of magnetic ASI have been fabricated and measured in recent years. However, some important effects including influence of vertex and geometrical distortion on their dynamic response have not been addressed. This dissertation adopts Ferromagnetic Resonance (FMR) spectroscopy to study magnetization dynamics in fabricated artificial spin ices with a contentiously distorted Honeycomb geometry...

THE ROLE OF MICROTUBULE-ASSOCIATED PROTEIN TAU IN NEURONAL EXCITABILITY AND EPILEPTOGENESIS

Ryan Cloyd
Tauopathies, including Alzheimer’s disease (AD), are devastating diseases with an immense burden on society which is predicted to increase in coming decades. In addition to progressive loss of memory and cognitive function, patients with tauopathies have a 6-10 fold increase in lifetime risk for seizures, and many are diagnosed with epilepsy. The presence of epileptiform activity on electroencephalogram (EEG) recordings from patients with AD predicts faster cognitive decline compared to patients without abnormal EEG readings....

Distance Education Administrators Starting Online Programs in Higher Education

Jason Johnston
While total enrollment for Title IV universities in the United States has declined 4 percent from 2013-2018, overall online course enrollment has rapidly increased by 22 percent (National Center for Education Statistics, 2020). Not long ago, distance education had limited diffusion in universities and was considered a tertiary, experimental “add-on” to education (Burnette, 2015). Now, online learning is becoming a transformative power striking profound influence and change on all aspects of higher education (Otte &...

CO-TEACHING PRACTICES OF GENERAL AND SPECIAL EDUCATORS IN SECONDARY SCIENCE CLASSROOMS

Samantha Ringl
The purpose of this study was to establish current levels of co-teaching implementation and to explore teachers’ perceptions of co-teaching and co-teacher relationships. This study also examined whether there is a relationship between teachers’ perception of their co-teaching relationship and their perception of co-teaching implementation in their classrooms. Analysis revealed that teachers generally have positive perceptions of their co-teaching partners and relationships, and these perceptions did not significantly differ between science teachers and special educators....

Novel Nonparametric Testing Approaches for Multivariate Growth Curve Data

Ting Zeng
Multivariate growth curve data naturally arise in various fields, for example, biomedical science, public health, agriculture, social science and so on. For data of this type, the classical approach is to conduct multivariate analysis of variance (MANOVA) based on Wilks' Lambda and other multivariate statistics, which require the assumptions of multivariate normality and homogeneity of within-cell covariance matrices. However, data being analyzed nowadays show marked departure from multivariate normal distribution and homoscedasticity. In this dissertation,...

Synthesis, Crystal Engineering, and Material Properties of Small-Molecule Organic Semiconductors

Emma Holland
Small-molecule organic materials are of increasing interest for electronic and photonic devices due to their solution processability and tunability, allowing devices to be fabricated at low temperature on flexible substrates and offering utility in specialized applications. This tunability is the result of functionalization through careful synthetic strategy to influence both material properties and solid-state arrangement, both crucial variables in device applications. Functionalization of a core molecule with various substituents allows the fine-tuning of optical and...

Registration Year

  • 2021
    295

Resource Types

  • Dissertation
    295

Affiliations

  • University of Kentucky
    295