Digital Commons Network^™

First Episodic Atmospheric Deposition Of Nutrients To Utah Lake: Statistical Analysis And Characterization, Cristian Alun Dorrett

Theses and Dissertations

Atmospheric deposition (AD) is a significant but poorly understood source of nutrients to many aquatic systems around the world. Accurate characterization of the nutrient budgets of aquatic systems is critical to good management decisions, so a better understanding of AD-related nutrient loads is essential, especially for water bodies where nutrient loads from atmospheric deposition are significant. Due to its large surface area, proximity to Great Basin dust sources, high values of atmospheric particulates due to inversions, and the high phosphorus content of local soils, Utah Lake, in the semi-arid Utah Valley, USA, experiences significant phosphorus loading from AD. The lake …

Designing Resilient Agents Using Grammatical Evolution, Behavior Trees, And Finite Linear Temporal Logic, Aadesh Neupane

Theses and Dissertations

Resilience is essential for long-term autonomous agents. Swarm behaviors seen in bees, ants, birds, fish, and others are interesting because they resiliently perform complex coordinated tasks like foraging, nest-selection, flocking and escaping predators without centralized control or coordination. Conventionally, mimicking swarm behaviors with robots requires researchers to study actual behaviors, derive mathematical models, and implement these models as state machines. Since the conventional approach is time-consuming and cumbersome, this dissertation uses a grammatical evolution algorithm with Behavior Trees (BTs) to evolve behaviors that are resilient to different perturbations for foraging and nest maintenance tasks. The modular, reactive, and readable properties …

Dopamine D2 Receptors As A Peripheral Biomarker For Brain Dopamine Levels, Christina Small

Theses and Dissertations

The ability to objectively index dopamine (DA) levels in the brain has the potential to revolutionize the field of neuropsychopharmacology, as having a peripheral biomarker of brain DA would enable the objective monitoring of the progression of Parkinson's disease (PD) and other DA-dependent psychiatric states. Of particular relevance to commercialization, it would provide an objective measure of treatment efficacy. We used a DA-depletion approach to determine if peripheral D2Rs are a biomarker for brain DA; mainly, the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) neurotoxin model and PD subjects, which are well-known models of DA depletion in the midbrain of rodents and humans, respectively. Dopamine …

Adolescence And Stress: A Longitudinal Examination Of The Role Of Stress On Health Outcomes And The Moderating Role Of Self-Regulation And Social Support, Joshua T. Christensen

Theses and Dissertations

Stress impacts all individuals during each developmental period of their lives. Stress has been linked to various physical and mental health outcomes across the lifespan. However, adolescence may prove to be a unique time to examine stress and its potential effects on various health outcomes, as well as possible mediating or moderating factors. The purpose of this study is to examine the link between stress and body mass index (BMI) percentile while incorporating the potential mediators of anxiety, depression, and externalizing behaviors as well as the moderators of social support and self-regulation. Using a sample of 500 adolescents living in …

The Effects Of Scientific Inquiry On The Self-Efficacy Beliefs Of Students Regarding Teaching Science As Inquiry, Jaclyn M. Todd

Theses and Dissertations

The purpose of this study was to investigate whether the course, Scientific Inquiry, significantly increased the self-efficacy beliefs of its students. According to Bandura (1977), an increase in self-efficacy could increase the likelihood that teachers implement scientific inquiry in their classrooms. I explored self-efficacy in an effort to address the overarching problem, an overall inconsistency of inquiry teaching in classrooms. There are numerous benefits associated with the implementation of scientific inquiry in today's classrooms. A key question then to investigate was whether the experience students gain by taking the course Scientific Inquiry can alter student self-efficacy beliefs which could increase …

Habitat Effects On Scorpion Densities And Microhabitat Use By Centruroides Vittatus And Vaejovis Waueri In South Texas, Jonathan Beltran

Theses and Dissertations

Co-existence between Centruroides vittatus and Vaejovis waueri is influenced by environmental factors that shape their habitats. Differences in surface activity frequency between the two species suggest differential microhabitat use. The observed frequency of scorpions using microhabitats in the Martinez Ranch and La Union Ranch were not significantly different from the expected frequencies. Frequency of scorpions observed using microhabitats in La Union South was significantly different from the expected frequency (P<0.001). Microhabitat use of catclaw was lower than expected and higher than expected for other vegetation. Conditional comparisons of microhabitats were significantly different among habitats (P<0.001), size classes were significantly different among microhabitats (P<0.001), and size classes were significantly different among habitats (P<0.01). Microhabitat use by scorpions on the ground was higher among all habitats. Scorpion use of ground and grass were different among size classes. Size class I-II scorpions had a higher frequency than size class III. Scorpion density for C. vittatus was significantly different among habitats (P<0.0001) and scorpion density for V. waueri was significantly different among habitats (P<0.0001). Centruroides vittatus was significantly higher in the Martinez Ranch and in La Union South. Vaejovis waueri was significantly higher in La iv Union South. Associations between plant densities and scorpion size classes were tested. Plant densities had a significant association with C. vittatus size classes I and II in the Martinez Ranch. Association between plants had a significant correlation with C. vittatus size classes I and IV in La Union Ranch. Association between plants had a significant correlation with V. waueri’s total density. These associations may suggest plant densities may have a synergistic effect on scorpion densities. Soil type composition for the different habitats was hypothesized to influence scorpion densities. Maps for each site were created to show soil type compositions. Soil type findings suggest that La Union South had the soil types with the lowest soil strength. Vaejovis waueri was shown to have a higher density in La Union South where soils are sandier. Results indicate that co-existence between C. vittatus and V. waueri is possible because competition is low through minimal overlap in microhabitat use and intraguild predation avoidance.

Body In Rebellion: The Closing Body, Romantic Mesmerism, And Gothic Doubles In Hogg's Justified Sinner, Elizabeth E. Hinds

Theses and Dissertations

This study explores the western Romantic period as a transition between the medieval “open body” and the modern “closed body.” It focuses on “closing body” phenomena such as “mesmerism” (i.e. animal magnetism), somnambulism, substance abuse, and the “second-self,” including notions of the subconscious and the trope of gothic Doppelgängers. This study draws from many pieces of western Romantic literature but is most centered around James Hogg’s 1824 The Private Memoirs and Confessions of a Justified Sinner. This new reading of Hogg’s novel suggests a core theme of body anxiety, rather than theological dispute.

A Language-Model-Based Chatbot That Considers The User's Personality Profile And Emotions To Support Caregivers Of People With Dementia, Yeganeh Nasiri

Theses and Dissertations

Chatbots are programs that mimic human conversation using Artificial Intelligence (AI). Recent advances in natural language pro- cessing pave the way for chatbots to generate more human-like responses. Therefore, chatbots are finding more complex tasks to perform, such as emotional support which requires both understanding emotions and the ability to properly respond to them. This work presents a chatbot capable of identifying the user's personality and creating responses based on that. During this process, emotion detection is being used to detect and react to users' emotions. The chatbot uses a dynamic knowledge graph to save information as the conversation goes …

Halophilic Genes That Impact Plant Growth In Saline Soils, Mckay A. Meinzer

Theses and Dissertations

Many plants are highly sensitive to salt in the soil, and their growth and yield can be greatly hindered by as little as less than 1% salt concentration in the soil. Additionally, soil salinity is a growing issue globally and affects significant areas in Utah. Halophytes are plants that are adapted to grow in saline soils and have been widely studied for their physiological and molecular characteristics, but little is known about their associated microbiomes. Bacteria were isolated from the rhizosphere and as root endophytes of Salicornia rubra, Sarcocornia utahensis, and Allenrolfea occidentalis, three native Utah halophytes. Several strains of …

Utilizing Isothermal Titration Calorimetry To Measure Β-Galactosidase Activity In Dairy Products, Tyler Ronald Jarrard

Theses and Dissertations

The dairy industry uses enzymes to make cheese, alter product flavor, and eliminate lactose. The activities of these enzymes have been measured in clear buffered solutions, but because of the limitations of spectrophotometric methods, enzyme activities have not been measured in opaque or colored dairy products where they are used. Isothermal titration calorimetry (ITC) can be used to determine reaction kinetics in opaque and colored solutions by measuring the heat rate from enzyme-catalyzed reactions as a function of time. This study used ITC to measure β-galactosidase activity in opaque solutions of milk, sweet whey, sweet whey permeate, acid whey, and …

Real-Time Imaging And Measurement Of Compartmentalized Redox Shifts Using Novel Redox-Sensitive Biosensors: Implications In Developmental Toxicology, Brandon Mitchell Davies

Theses and Dissertations

Glutathione (GSH) is a small antioxidant in the body and exists in large quantities compared to other antioxidants. The GSH redox state (Eh) helps developmental processes, however, when the GSH Eh is disrupted, cells may undergo significantly poor developmental pathways, possibly leading to long-lasting damages. Similarly, NADPH and Thioredoxin redox states can have a major impact on cellular function, viability, and response to both endogenous and exogenous toxicants. Subcellular, compartmentalized redox environments during normal or perturbed situations, specifically in the cytosol, mitochondria, and nucleus, are not well understood. Here, using the P19 neurogenesis model of cellular differentiation, the kinetics of …

More Than A Framework: Adopting An Equity Mindset Action Steps For School Leaders To Enact Change, Michelle Y. Hassan

Theses and Dissertations

To secure the economic well-being of our country in the current global society, we must be concerned with all students, and all means all. This qualitative research study asserts the need to stop focusing on the achievement gap and work to close opportunity gaps through equitable school practices. This narrative inquiry study critically analyzed equity frameworks and sought to understand how equity directors translate theory into praxis. Their counternarratives shared their approach to praxis during their journey. This study used Critical Race Theory (CRT) and CRT in Education theoretical frameworks to examine the equity directors' experiences. Their stories provided wisdom …

A Causal Comparative Study Of The Effects Of Physical Activity Course Enrollment On College Students’ Perceived Wellness, Mental Health, And Basic Psychological Needs, Genee’ Regina Glascoe

Theses and Dissertations

On college campuses, there has been an increase in mental health needs among students. In 2019, 56% of students attended counseling for mental health concerns compared to 46% of students who attended in 2010 (The Center for Collegiate Mental Health, 2019). Colleges have begun focusing on student wellness to assist their students with the capability to thrive during their college years and beyond (LaFountaine et al., 2006). Basic psychological needs must be met to achieve psychological growth and wellbeing (Ryan & Deci, 2000b; Zhang et al., 2012). Taliaferro et al. (2009) found evidence of an association between physical activity and …

Preferences Of Adults With Turner Syndrome Regarding Disclosure Of Potential Neurodevelopmental And Psychiatric Features, Elizabeth Pancake

Theses and Dissertations

This study aimed to assess preferences of adults with Turner Syndrome (TS) regarding provider disclosure and discussion of potential neurodevelopmental or psychiatric features.

Fifty-six individuals with TS completed an online survey. Questions were asked about their TS diagnosis and provider involvement, neurodevelopmental and psychiatric diagnoses, and preferences concerning providers’ disclosure regarding these possible non-physical features.

Sixteen individuals reported a formal neurodevelopmental diagnosis. Furthermore, 46 respondents reported personal suspicion of ADHD, math difficulties, weaker non-verbal or visual-spatial skills, intellectual disability, or autism spectrum disorder. Thirty-five individuals had a formal diagnosis of at least one psychiatric condition. The preferred providers to initiate …

Detecting Physiological Concentrations Of Alzheimer’S Associated Amyloid-Β Protein Utilizing A Cell-Based Response, Brittany Elizabeth Watson

Theses and Dissertations

Alzheimer’s disease (AD) is characterized symptoms of cognitive impairment resulting from blood-brain barrier (BBB) breakdown and neuronal cell death. AD is associated with aggregated amyloid-β (Aβ) plaques deposited around brain vasculature and within the brain. Changes in the brain occur up to 20 years before symptoms arise; however, there is currently no pre-symptomatic detection method available for AD. An intact BBB requires tight junction proteins (TJs) that render relatively high transendothelial electrical resistance (TEER). AD-associated breakdown of the BBB correlates with vascular Aβ deposition, suggesting that aggregated, pathological Aβ can modulate TEER. We explore leveraging this cellular response for early …

Effect Of Action Selection Demands On The Execution Of Goal-Directed Reaches, James Garrison Riedy

Theses and Dissertations

A well-studied model of cognitive motor function is the process of action selection. It is unclear how the planning demands of a reaching movement interact with the added complexity of s election. Therefore, this thesis investigated the effect of adding selection demands to the performance of skilled reaches in a virtual environment. Thirty young, healthy participants reached ipsilaterally or contralaterally with either their dominant (right hand) or non-dominant (left hand) under two conditions: execute only (EO) and action selection (AS). Selection accuracy was higher for the EO condition than the AS condition for both arms and both directions (left arm: …

Structural And Immunological Characterization Of Inhaled Allergens And Their Complexes With Antibodies, Kriti Khatri

Theses and Dissertations

Allergy is an outcome of an allergen-antibody reaction (1). Potent airborne allergens from dust mites and pets are major causative factors for allergic conditions among predisposed individuals. Group-2 allergen Der p 2 from Dermatophagoides pteronyssinus is a major allergen which causes allergic conditions in more than 80% of mite-allergic subjects (2). Similarly, airborne allergen Can f 1 from dog (Canis familiaris) is also a major risk allergen which affects 10-20% of the population worldwide (3). Considering the increasing prevalence of inhalant allergens in the environment, antigenic characterization is crucial for improving allergy diagnostics and management. This study focuses …

The Kinetic Control Of Polymer Micelles; Chemical Functionality, Material Interactions, And Equilibration, Taylor Larison

Theses and Dissertations

Polymer micelles have found significant uses in areas such as, energy storage devices, catalysis, opto-electronics, drug-delivery, oil additives, and nanoreactors. In many of these applications the overall micelle size (aggregation number) and chemical functionalization determines performance. To progress towards more advanced materials synthesized from the facile bottom-up approach with polymeric micelles the implementation and study of thermodynamic handles were investigated. Here the kinetic control of micelles was studied across a range of applications; independent control over micelle functionality, the spatial orientation of multiple metal oxide nanoparticles in mesoporous materials via self-assembly, and the use of small-angle neutron scattering (SANS) to …

“We Are Created Inferior To Men”: Leveraging Horsemanship To Reinforce Gender Expectations, 1830-1861, Gabrielle Marie Mccoy

Theses and Dissertations

Horses have played a central role in human society since 3500 BCE when humans began domesticating and riding horses in large numbers. Horses continued to be important to human society during the nineteenth century as people used horses to drive industrialization, manage plantations, and transport goods, among other uses. Although historians and anthropologists have long extolled the horse’s laboring value, this paper views the horse and horsemanship (i.e., horseback riding, horse training) in a social context. Through the examination of newspapers, fictional literature, and manuals, this paper argues that Americans used horses and horsemanship to reinforce antebellum gender expectations. Reinforcing …

Ciento Ochenta Grados: South Carolina Promotores De Salud And The Covid-19 Pandemic, Richard Lyle Strater

Theses and Dissertations

This research engages with promotores de salud in South Carolina to examine sustainability challenges in their work to support Hispanic and Latino communities through advocacy-as-care approaches. This thesis contributes to scholarly literature on CHWs in the United States at a time when the profession is working to legitimize itself through professional advocacy, which includes the organization of state CHW associations, regional CHW networks, and the National Association of Community Health Workers (NACHW). Their work to support communities is, at times, made more difficult because of their positioning within formalized neoliberal systems of care, while also being marginalized by their lack …

Family Therapy, K-12 Public Education, And Discipline Risk: A Scoping Review And Relationship Analysis Multiple Manuscript Dissertation, Cara Melinda Thompson

Theses and Dissertations

This dissertation contains two studies that examine family therapy services within public schools related to behavioral or discipline concerns. Both studies stem from an ecological and family systems theoretical framework in examining relationships between the student, family, and school systems. The first study is a scoping review on family therapy within a school context related to a behavioral or discipline concern and provided by a clinical mental health counselor or family therapist. This scoping review summarized both empirical and conceptual literature by type and degree of school context, type of behavioral issue addressed, interventions, and outcomes measured or contributions. The …

Understanding The Spectrum Of Cacna1a Related Disorders: An Analysis Of Genotypes And Phenotypes In 416 Individuals, Olivia Jane Wilmarth

Theses and Dissertations

Pathogenic variants in the CACNA1A gene disrupt a calcium channel expressed in the central nervous system, causing a variety of neurological and psychiatric features collectively known as CACNA1A-related disorders. Gain-offunction and loss-of-function of this channel are both well-established mechanisms of disease, but specific genotype-phenotype correlations have remained unclear. Previous research has been limited by small sample sizes, with some studies noting significant intrafamilial variation and reduced penetrance. This study aimed to collect and analyze genotypic and phenotypic data from a large sample of individuals with CACNA1A-related disorders published in the literature and in two patient cohorts. Using the …

The Effects Of Inservice Science Teachers’ Self-Efficacy On Science Achievement Using The 5e Model Of Instruction., O'Tessa Nicole Pelham

Theses and Dissertations

Science achievement has been a major focus in our educational system. While several learning models effectively increase science achievement, the nation is still not progressing adequately. A gap in the literature shows the need to find the effects of teachers’ self-efficacy, specifically with in-service science teachers. A pretest-posttest, non-equivalent control group, quasi-experimental research design was used in Fall 2022 and Spring 2023 to find the effects of in-service science teachers’ self-efficacy on science achievement, using the 5E Instructional Model. The study included 38 in-service science teachers who rated items on the pretest/posttest STEBI-A. Teachers in the experimental group consisted of …

Advancements In Parametric Modal Regression, Qingyang Liu

Theses and Dissertations

This dissertation considers statistical inference methods for parametric modal regression models. In Chapter 1, we motivate the mode as the measure of central tendency instead of the median or the mean with an example. Following the motivational example, we include an overview of existing modal regression models. Later, in the same chapter, we explain advantages of the parametric modal regression models over existing nonparametric modal regression models. In Chapter 2, we address issues in statistical inference brought in by data contaminated with measurement error. With measurement error in covariates, statistical inference methods designed for modal regression models with error-free covariates …

Violence, Rebellion, And Compromise In Chinese Campus Cinema ----- The Comparison Of Cry Me A Sad River And Better Days, Chunyu Liu

Theses and Dissertations

This dissertation examines the social critiques in Chinese campus films by viewing their development and cultural context. Social Criticism, a prominent trend in Chinese cinema, addresses a wide range of widely concerned social issues, including education, romance, marriage, politics, environmental concerns, psychological repressions, etc. It appears that a Chinese mainland woman filmmaker and a Hong Kong professional director echo each other on the same theme. They are inspired by similar genuine events and share many similarities in the way they orchestrate the relationships and backgrounds of the characters. However, the two films retain their different characteristics. This thesis will discuss …

Genetic Mechanisms Underlying Maladaptation In Specialized Species Interactions, Nitin Ravikanthachari

Theses and Dissertations

Adaptation has been used as the framework to understand the power of natural selection in structuring biodiversity and driving biological interactions. However, recent examples have indicated that many organisms are maladapted to their local conditions. Maladaptation can result from various causes including rapid environmental change, novel environments, interplay of evolutionary forces (viz: gene flow-selection balance) and anthropogenic disturbance.

To dissect the genetic mechanisms underlying maladaptation, I used the interaction between Pieris macdunnoughii (Remington) (Lepidoptera: Pieridae) which lays eggs on an invasive mustard Thlaspi arvense (L.) (Brassicaceae), which is lethal to the larvae.

First, local adaptation to avoid laying eggs on …

An Exploration Of Perinatal Stress And Associated Mental Health Of Transitioning First-Time Fathers, Timothy Reed Burkhalter

Theses and Dissertations

Becoming a first-time parent is a stage in life that can be full of excitement but also trepidation. Much common knowledge and research focus on the maternal experience. To add to this established knowledge, this phenomenological study will explore the perinatal stress experiences of transitioning first-time fathers in the U.S.

Evaluation Of A Radium-Thorium Disequilibrium Sediment Method Used To Model And Assess Porewater And Submarine Groundwater Exchange In The Coastal Marsh, Madeline R. Bodine

Theses and Dissertations

Ground, pore, and surface water exchange has been extensively studied in beach and near shore environments but has been long neglected in saltmarsh systems due to their complexity. Saltmarsh systems are of particular importance as they are the interface between fresh and saltwater. Saltmarshes impact carbon exchange, release and sequestration, and they process particulate matter. Understanding the characteristics of a marsh system such as the nutrient and particulate loads in conjunction with the flux of water exchange through the marsh provides a deeper understanding of these systems and can impact our understanding of the global water and carbon cycles, as …

Examining Associations Between Social Needs And Mental Health Among Youth And Young Adults With Diabetes, Andrea Danielle Brown

Theses and Dissertations

Household food insecurity (HFI) disproportionally affects people with diabetes living in the United States and is more likely to occur in households with children and in minority race/ethnicity households. Food insecure people with youth-onset diabetes likely have increased risk for poor mental health due to dealing with stress and cost related to diabetes management, especially if facing additional health-related social needs that intersect with HFI. If left untreated, poor mental health among youth and young adults (YYA) with diabetes can lead to diabetes-related complications, increased health care costs, and mortality. Yet few studies have examined associations between HFI and mental …

How Do You Feel, Kaitlyn Alexis Guinyard

Theses and Dissertations

The following is an incomplete manuscript of the novel, How Do You Feel. Set in a post-dystopian future, a city-sized ship called Pilgrim sails toward the mysterious Blue Star. Onboard, society has divided itself, in which the lowest of them all, Leashed, are enslaved by Tuners. While many inhabitants dream of reaching land again, its enslaved people cannot dream, let alone feel. Among them, Elijah is one of the numbest. She obeys her Tuner and abides by the order of Pilgrim. However, her world changes once she’s touched by the Blue Star, and she discovers many horrors lurking in …