Digital Commons Network^™

Sociocultural Predictors Of White Veterans’ Attitudes Towards Va Mental Health Care, Elyssa Christine Berney

Theses and Dissertations--Educational, School, and Counseling Psychology

U.S. Veterans are less likely to seek help than their civilian counterparts despite having higher levels of self-reported distress, in part due to comparatively poorer attitudes towards seeking mental health treatment. While some aspects of cultural socialization (e.g., gender role expectations, certain types of stigma) have been established to influence Veterans’ attitudes towards mental health treatment, other aspects of health care access (e.g., trust in health care institutions or individual providers) may benefit from increased focus. Additionally, one aspect of cultural socialization that is understudied in white Veterans is that of racial-cultural socialization (i.e., whiteness). Much of the research into …

Enabling Dapps Data Exchange With Hardware-Assisted Secure Oracle Network, Yue Li

Theses and Dissertations--Computer Science

Decentralized applications (dApps), enabled by the blockchain and smart contract technology, are known for allowing distrustful parties to execute business logic without relying on a central authority. Compared to regular applications, dApps offer a wide range of benefits, including security by design, trustless transactions, and resistance to censorship. However, dApps need to access real-world data to achieve their full potential, relying on the data oracles. Oracles act as bridges between blockchains and the outside world, providing essential data to the smart contracts that power dApps. A significant challenge in integrating oracles into the dApp ecosystem is the Oracle Problem …

Sex Differences In Cardiometabolic Risk Factors In Youth With Obesity, Lucrecia Valdez

Theses and Dissertations--Nutrition and Food Systems

Background: The prevalence of hypertension in children and adolescents is rising, with 13% having elevated blood pressure and 5% having hypertension. Sex differences play a role in cardiovascular diseases in adults but are not well defined in youth. The objective of this study is to identify sex differences in obesity-mediated cardiometabolic risk factors in adolescents. Methods: This is a pilot study of n=82 youth with obesity recruited from a High BMI Clinic. Clinical data and blood samples were collected at a single time point. Serum sterols were quantified via LC-MS/MS. Number of cardiometabolic risk factors were evaluated. Data are mean …

The Centrality Of Claim-Making In The Social Studies Classroom: Teaching For Claim-Making With The Persuasive Claim Framework, Ryan Anders Lewis

Theses and Dissertations--Curriculum and Instruction

This dissertation includes three articles that focus on the importance of claim-making and argumentative writing in social studies classrooms. Each article highlights various aspects of the claim-making process by introducing ways for teachers to help students write better claims, highlighting the importance of claim-making within the extant social studies literature, and analyzing the results of centering the claim-making process in a preservice teaching methods program.

Article One, “What’s in a Claim: A Framework for Helping Students Write Persuasive Claims?” (2021), is an article written for practicing teachers. As part of a larger discussion on the challenges of implementing the dimensions …

Moral Foundations And Student Perceptions Of Academic Dishonesty: A Mixed Methods Study, Carla Spires Hargus

Theses and Dissertations--Curriculum and Instruction

This mixed methods study explored students’ hypothetical choices of behavior in a series of ten academic vignettes. In addition, it examined student judgments of academic behaviors as acceptable or dishonest. Finally, it compared scores on the Moral Foundations Questionnaire-2 to the importance of factors that might influence student behavioral choices in real world scenarios and explored the differences in perceptions among demographic groups.

Twenty-five undergraduate students participated in the study. In a semi-structured interview, each student discussed ten academic vignettes: predicting their own hypothetical behavioral choice, judging target behaviors as honest or dishonest, and identifying factors that would most influence …

Parallel Real Time Rrt*: An Rrt* Based Path Planning Process, David Yackzan

Theses and Dissertations--Mechanical Engineering

This thesis presents a new parallelized real-time path planning process. This process is an extension of the Real-Time Rapidly Exploring Random Trees* (RT-RRT*) algorithm developed by Naderi et al in 2015 [1]. The RT-RRT* algorithm was demonstrated on a simulated two-dimensional dynamic environment while finding paths to a varying target state. We demonstrate that the original algorithm is incapable of running at a sufficient rate for control of a 7-degree-of-freedom (7-DoF) robotic arm while maintaining a path planning tree in 7 dimensions. This limitation is due to the complexity of maintaining a tree in a high-dimensional space and the network …

Social Transformation During The Middle - Late Preclassic (1,000 Bce - 150 Bce) At Ucí, Yucatan Mexico, Daniel Vallejo-Cáliz

Theses and Dissertations--Anthropology

The focus of this project is to track the social change developments in Ucí, Yucatan, Mexico, during the Middle (1,000 – 400 BCE) and Late Preclassic (400 – 150 BCE) that served as foundations to institutionalized hierarchy. This research is geared towards understanding if there were any expressions of social differentiation in the earliest, detectable moments in the history of Ucí, and what were the mechanisms used to eventually make distinctions permanent. Applying an agency approach, I argue that social actors may cause structural change, both consciously and inadvertently, through the application of several strategies aimed to enhancing their role …

Use Of Molecular Genetics To Investigate Population Structure And Swayback In Horses, Navid Yousefimashouf

Theses and Dissertations--Veterinary Science

The present research incorporated molecular genetic methods to 1) investigate the genetic basis of Juvenile Onset Lordosis or Swayback in the American Saddlebred horses; and 2) conduct a population genetic study to compare the Persian Kurdish, Persian Arabian and American Thoroughbred horse populations.

Juvenile-onset lordosis, or swayback, is a condition in horses where the conformational topline back curvature drops significantly within the first two years of life. The trait has a higher prevalence in Saddlebreds (5%). Prior research on them quantified the trait using a Measurement of Back Contour (MBC), defining an MBC of >7.0 centimeters as swayback, and8.0) MBC …

Using 3-Dimensional Mapping To Determine The Possibility Of Structural Control On Development Of The Upper Ordovician Lexington Limestone, Central Kentucky, U.S.A., Sean Davis

Theses and Dissertations--Earth and Environmental Sciences

The upper Lexington Limestone of Late Ordovician age has been interpreted to represent a structurally controlled, complex, facies mosaic. This facies mosaic has historically been interpreted to be a carbonate buildup of shoal complexes with interbedded shale units with intertonguing facies. Due to relatively recent advances in geographic-information-systems (GIS) mapping technologies, it is possible to generate three-dimensional (3-D) compatible maps to offer insight to the complexities of the upper Lexington Limestone and to determine if structural control affected the distribution of members. The resulting two-dimensional (2-D) and 3-D maps show that basement faults likely exerted a significant influence on facies …

Age- And Sex-Dependent Alterations In Primary Somatosensory Neuronal Calcium Network Dynamics During Locomotion, Sami L. Case

Theses and Dissertations--Pharmacology and Nutritional Sciences

Over the past 30 years, the calcium (Ca2+) hypothesis of brain aging has provided clear evidence that hippocampal neuronal Ca2+ dysregulation is a key biomarker of aging. Indeed, age-dependent Ca2+-mediated changes in intrinsic excitability, synaptic plasticity, and activity have helped identify some of the mechanisms engaged in memory and cognitive decline. However, much of this work has been done at the single-cell level, mostly in slice preparations, and in restricted structures of the brain. Recently, our lab identified age- and Ca2+-related neuronal network dysregulation in the cortex of the anesthetized animal. Still, investigations in the awake animal are needed to …

Dosimetric And Clinical Investigation Into Dose Variations Of The Target And Organs At Risk In High Dose Rate Gynecological Brachytherapy, Brien Washington

Theses and Dissertations--Radiation Medicine

The technological advancements in brachytherapy have allowed for increased precision and better-quality treatments. This is apparent in treating GYN cancers of the uterine cervix. Lengthy low dose rate (LDR) treatments, implant systems, and two-dimensional (2D) image-guided treatments have been replaced by quicker high dose rate (HDR) treatments and adaptive treatment planning with three-dimensional (3D) imaging modalities. However, this increased precision can result in reduced dosimetric accuracy. Implant systems were designed to conform to the prescribed dose, and 2D plans were only concerned with dose to two organs at risk (OAR) parameters. Now, planners must consider added OAR position data and …

Improving Radiotherapy Workflow: Evaluation And Implementation Of Deep Learning Auto-Segmentation In A Multi-User Environment, And Development Of Automatic Contour Quality Assurance System, Jingwei Duan

Theses and Dissertations--Radiation Medicine

Radiotherapy is a frequently used therapeutic modality for cancer patients. Accurately contouring of tumors and organs at risk (OARs) is critical for developing optimal treatment plans in radiotherapy, especially after the implementation of Intensity-modulated radiation therapy (IMRT) and Stereotactic Body Radiation Therapy (SBRT). The manual contouring process is time-consuming and suffers from inter-observer variations. However, manual contouring is often hindered by laborious clinical duties, leading to reduced effectiveness, and increased segmentation errors due to fatigue. Additionally, online adaptive radiation therapy(ART), which has been shown to benefit patient outcomes, places higher demands on contouring and quality assurance (QA) speed.

Recently, deep …

"No, Not There": The Literary Precarity And Profundity Of Queer Spatiality, Samuel James Aftel

Theses and Dissertations--English

Love, broadly defined, needs space to grow. For love to materialize and sustain itself (in both literature and society), it must find hospitable geosocial, institutional, and psychic terrain. This is especially true for queer intimacies beyond heteronormative relationality, for the prospect of love’s radical––or reactionary––possibilities is contingent upon the more general sociality in which it develops. Yet love is often a worldmaking and, sometimes, historic mechanism unto itself. Love and its concomitant sexualities must therefore be understood within and without normative structures of hegemony; the workings of (neo)colonialism and capitalism––as well as patriarchy, white supremacy, and heterosexism––dictate to love, and …

Increasing Efficiency Of Finishing Beef Production: Strategies To Optimize Starch Digestion, Improve Flake Quality, And Reduce Methane Emissions, Ronald J. Trotta

Theses and Dissertations--Animal and Food Sciences

To continue to meet the demands of increasing food production and environmental sustainability, new strategies are needed to enhance the efficiency of finishing cattle production. A review of the literature identified several nutritional and physiological constraints that limit the ability for cattle to digest starch and absorb glucose from the small intestine. Comparative sequencing analyses revealed a missing region of the sucrase-isomaltase protein which could affect the capacity for starch digestion in cattle. Post-flaking sampling and handling recommendations were generated based on a series of experiments to improve estimates of starch availability and flaking consistency for commercial feedlots and laboratories. …

Selenium Form-Induced Changes In The Early Luteal Phase Corpus Luteum, The Blood, And The Endometrium During Early Gestation In Beef Cows, Sarah Nancy Carr

Theses and Dissertations--Animal and Food Sciences

Selenium (Se) deficient soils and thus forages are widespread throughout the United States, necessitating supplementation of this trace mineral in the diet of grass-fed cattle to negate detrimental effects of a deficiency on immune function, growth, and fertility. Conventionally, Se is supplemented to cattle in a vitamin-mineral mix as an inorganic form (ISe) although the organic forms (OSe) are available when cattle consumer forage, and OSe has been shown to increase the bioavailability of Se in cattle. Previous research has demonstrated supplementation with 1:1 mixture (MIX) of ISe and OSe compared to ISe alone increases systemic concentrations of progesterone (P4) …

Ideal Body Weight And Body Fat Percentage Predict Relative Energy Deficiency In Sport (Red-S) Scores In Collegiate Athletes, Emily Norman

Theses and Dissertations--Nutrition and Food Systems

Background: Low energy availability (LEA) is the underlying cause of Relative Energy Deficiency in Sport (RED-S) which negatively affects athletes' physiological function, health, and performance. RED-S results from inadequate dietary intake to support energy expenditure for daily living, growth, and optimal performance. It occurs in both male and female athletes, with or without disordered eating. However, screening and diagnosis in athletes can be difficult. Objective: This study aims to identify strong predictors of RED-S and assess its prevalence in collegiate male and female athletes. Methods: A total of 270 NCAA athlete test points from mixed sports were evaluated for RED-S …

Transformative Learning In Teachers’ Family Collaboration With English Learner Families: The Role Of Beliefs, Cultural Competence, And Communities Of Practice, Sara Saberimoghaddam

Theses and Dissertations--Education Sciences

Through a multiple case approach, this qualitative research study examined how teachers' beliefs on family collaboration and cultural competence related to their family collaboration practices within Culturally Responsive Instruction. The learning theories of Communities of Practice (Lave &Wenger, 1991) and Transformative Learning (Mezirow, 1978), and Critical Consciousness (Freire, 1979) were used as the lens to analyze the data. Teacher interviews and classroom observations were used as data sources. The study found that teachers’ perception of cultural competence impacted their classroom practices. Teachers who worked hard to intentionally change their cultural competence awareness into family collaboration actions appeared to be more …

Essays On Race And Finance, Tian Qiu

Theses and Dissertations--Finance and Quantitative Methods

In my first chapter, I show a positive municipal financing shock has heterogeneous effects on academic achievement. White students show meaningful improvement, but Black and Hispanic students do not. Consequently, the achievement racial gap widens following the shock. Changes in school funding do not explain this phenomenon; rather, it is explained by heterogeneous outcomes in household Socioeconomic Status (SES). These results highlight the possibility that a credit shock-induced increase in government spending could unexpectedly increase the local racial disparity. The second chapter examines the role of race and racial concordance between financial advisors and their local community. There are significant …

The Influence Of Apoe Genotype On Lipid Droplet Dynamics, Cassi Friday

Theses and Dissertations--Physiology

Excess lipid droplet (LD) accumulation is associated with several pathological states, including neurodegenerative disorders such as Alzheimer’s disease (AD). However, the mechanism(s) by which changes in LD composition and dynamics may contribute to the pathophysiology of AD remains unclear. Apolipoprotein E (ApoE) is a droplet-related protein with a common variant (ApoE4) that confers the largest increase in genetic risk for late-onset AD. Interestingly, ApoE4 is associated with both increased neuroinflammation and excess LD accumulation. This dissertation work seeks to quantitatively profile the lipid and protein composition of LDs between the ‘neutral’ ApoE3 and ‘risk’ ApoE4 isoforms, in order to gain …

Body-Based Harassment And Eating Disorder Symptomology In Cisgender, Transgender, And Gender Nonconforming Individuals, Sharla D. Biefield

Theses and Dissertations--Psychology

Past research estimates that over 60% of adolescents and young adults report eating disorder symptomology (EDS), increasing their risk for psychiatric and physical comorbidities, substance abuse, and self-harm. EDS rates are also higher among transgender and gender nonconforming (TGNC) individuals. TGNC individuals also experience higher rates of bias-based harassment, than their cisgender peers. Much of this harassment is body-based harassment (BBH), such that the harassment often targets aspects of an individual’s body. The current study utilized a pantheoretical framework, incorporating minority stress theory and objectification theory, and a multi-method approach to investigate (1) if BBH increases TGNC individuals’ risk for …

Ovid's Caeneus As A Queer Hero: Understanding Gender And Gender Variance In The Ancient Mediterranean., Rj Palmer

Theses and Dissertations--Modern and Classical Languages, Literature and Cultures

Caeneus, as written in Ovid’s Metamorphoses, is a notable blend of ancient and Hellenistic versions of the myth. Ovid’s Caeneus can be understood as a transgender man, since he was assigned female at birth, but asks for his gender to be changed by the god Neptune, and goes on to live the rest of his life with the body, appearance, and social roles of a man. Ovid incorporates Caeneus’ trans identity with his use of grammatical gender endings for Caeneus, using masculine gender for Caeneus except when discussing his pre-transition childhood, or when the centaurs address him mockingly while fighting. …

Role Of Autophagy In Aortic Aneurysms, Aida Javidan

Theses and Dissertations--Pharmacology and Nutritional Sciences

Abdominal Aortic Aneurysms (AAAs) are permanent dilations of the abdominal aorta with greater than 80% mortality after rupture. Currently, there are no proven non-surgical therapeutics to blunt expansion or rupture, which highlights the need to gain mechanistic insights into AAA formation. AAA formation involves a complex process of destruction of aortic media through activation of matrix metalloproteinases (MMPs), loss of smooth muscle cells, degradation of extracellular matrix proteins like elastin and collagen, and inflammation. Autophagy is a well-conserved cellular process whereby damaged cytoplasmic organelles and long-lived proteins are degraded. Cellular autophagic activity is usually low under normal conditions but can …

Mitochondria As Causes Of And Therapeutic Targets In Chronic Post-Sepsis Skeletal Muscle Weakness, Meagan Scott Kingren

Theses and Dissertations--Pharmacology and Nutritional Sciences

Sepsis, or the organ damage that ensues after the body fails to properly contain a local infection, is the leading cause of in-patient hospitalization in the United States. Advances in critical care medicine over the last 20 years have enabled most sepsis patients to survive the life-threatening dysregulated immune response. However, a majority of survivors report chronic weakness and fatigue years after sepsis, and the cause of this weakness remains largely unknown. This dissertation work focused first on elucidating the major causes of post-sepsis muscle weakness (Aim 1). This aim involved a time-course study to determine when muscle weakness was …

The Spread Of Nuclear Technology: The Difficulty Of Arms Control And The Consequences Of Nuclear Proliferation, Bryce Allen Beschorner

Theses and Dissertations--Political Science

The potential impact of nuclear technology on international relations raises a number of important questions for scholars and policymakers. This dissertation focuses on different aspects of nuclear-related cooperation and competition and attempts to answer some of these questions. In this dissertation, I address three main puzzles related to nuclear politics using a mixed methods approach. First, I examine the consequences of the spread of nuclear technology on the outcomes of international crises, specifically focusing on the impact of nuclear weapons tests on crisis outcomes. Using data on nuclear weapons tests, I argue and find support for the notion that nuclear …

The Appalachian System Of Basins And Platforms As A Tectonostratigraphic Analogue To The Barents Sea Shelf: Where Arctic Meets The Appalachians, Gustavo De Aguiar Martins

Theses and Dissertations--Earth and Environmental Sciences

Divided between Norway and Russia, the Barents Sea shelf (BSS) is an ~1.4 million km² Arctic province, containing significant hydrocarbon accumulations. However, much of the area is frontier, and geologic data are often restricted or unavailable. One strategy to mitigate lack of geologic data is the use of analogues from well-known, mature basins. Even though there have been attempts to use analogues to study the geology of the BSS, such use is limited. Moreover, no analogue, to my knowledge, has been capable of addressing the regional tectonostratigraphic development of the shelf as a whole.

In this research, the Appalachian …

Closing The Modern Seismic Gap Along The Teton Fault Via Seismic Mapping Of Mass Transport Deposits In Jackson Lake, Wy, Callia Jacqueline Cortese

Theses and Dissertations--Earth and Environmental Sciences

Terrestrial paleoseismological records along the Teton fault have historically indicated two-to-three major post-Pinedale (~14 ka) earthquake events, leaving an unresolved 6-9 m offset along the modern scarp. Recent studies of Jenny Lake have augmented this record, but the triggering mechanism is still equivocal until new paleo-earthquake records are developed. The earthquake record of the Teton fault is complicated by quiescence from ~5 ka to present, demonstrating the need for additional paleoseismic investigations. Compressed, high-intensity radar pulse (CHIRP) reflection data from Jackson Lake indicates multiple potentially seismically-induced mass transport deposits (MTDs). At least six MTD Groups representing chronostratigraphic intervals were interpreted …

A Source-To-Sink Analysis Of The Pantanal Basin (Brazil): Implications For Weathering, Erosion, And Landscape Evolution In The World's Largest Wetland, Edward L. Lo

Theses and Dissertations--Earth and Environmental Sciences

Large back-bulge retro-arc basins have limited information about the sediment composition, yet they comprise important parts of the stratigraphic rock record. The exorheic Pantanal Basin is the world's largest continental wetland that regulates many valuable ecosystem services (water storage, nutrient cycling, agriculture, ranching, tourism, and transportation). This dissertation is composed of three studies that utilize a suite of tools to examine the most fundamental basin-wide source-to-sink sediment processes and controls that affect the characteristics and distribution of modern sediments.

The first paper consists of a metadata analysis of 76 shallow tropical floodplain lakes in the literature with bathymetric data and …

Estimating Bedrock Shear Wave Velocity At Vsap, Paducah, Kentucky, Using Ambient Noise, Russel Rogers

Theses and Dissertations--Earth and Environmental Sciences

Due to the nature of the Mississippi Embayment region and its vicinity to the New Madrid Seismic Zone, earthquake ground-motion site effects are potential hazards and quantifying the associated hazard is a necessary step for public safety. Measuring the V_s contrast between bedrock and overlying soil layers is necessary for site effect evaluation. Various methodologies for investigating shear wave velocity (V_s) profiles have been implemented in the Mississippi Embayment. However, these previous studies provided a wide range of bedrock Vs. In this study, microtremor array measurements, utilizing ambient background noise, were used to provide an additional estimate …

3-Dimensional Muscle Constructs: Using Hydrogels In Order To Model The Effects Of Exercise In Disease Conditions, Mark Mchargue

Theses and Dissertations--Biomedical Engineering

Currently, there is no standard in vitro model for studying the effects of mechanical stimulation on muscle in type II diabetes. Existing models primarily utilize electrical stimulation, which does not fully recapitulate the effects of exercise. In this thesis, we create a standardized in vitro model of murine muscle that can recapitulate the benefits seen in exercise when mechanically stimulated. Moreover, we show that a type II diabetes environment has similar effects on the muscle in vitro as well as in vivo.

Sugar And Spice: Sex, Money, And Social Media, Rachel Elizabeth Davis

Theses and Dissertations--Sociology

Interest in transactional sex, or the provision of a sexual relationship in exchange for gifts and/or money, has increased in recent years among researchers, nongovernmental organizations, and law enforcement officials as increasing numbers of women self-identify as hypergamous, indicating their interest in forming heterosexual partnerships with men of higher status. Hypergamous women may identify as sugar babies, spoiled girlfriends, or high-value women. A sugar baby is a woman providing romantic companionship to an older man, known as a sugar daddy, in exchange for money and/or gifts. A spoiled girlfriend is a woman whose partner provides her with money and/or gifts …