Digital Commons Network^™

Examining Variables Associated With Age Of First Concern And Diagnosis In Children With Autism Spectrum Disorder, Amy Mathews Creel

Electronic Theses and Dissertations

Abstract

Autism Spectrum Disorder is a disorder that is present during a child’s early developmental ages; affects that child’s ability to communicate and socially interact with others; and involves the presentation of restrictive interests and/or repetitive behaviors. Autism Spectrum Disorder (ASD) symptoms/behaviors are recognized by parents and can be reliably diagnosed at age two but often are not diagnosed until after age four. Delay in diagnosis results in loss of important intervention services that can improve the well-being of children with ASD. This study examined ethnicity, severity of symptoms, and type of symptoms and their effect on the age at …

An Examination Of The Relationship Between Ethnic Identity Development, Cognitive Complexity, Differentiation Of Self, And Reports Of Racial And Ethnic Microaggressions, Deshae C. Gatti

Electronic Theses and Dissertations

Although individuals may not engage in racism consciously due to social undesirability, they may have biases that manifest in more subtle and unconscious ways. Research has found that people of color experiencing different racial and ethnic microaggressions in their everyday lives are subject to pervasive and negative impacts on their mental health, though little is known about the influence of one’s ethnic identity formation, affective processes, and cognitive processes. A multiple regression analysis was conducted to examine the degree to which ethnic identity development, cognitive complexity, and differentiation of self were associated reported experiences of microaggressions. The analysis indicated that …

Mapping The Self: Reconciling Identity Through An Expansion Of The American Road Genre, Tinesha K. Mix

Electronic Theses and Dissertations

This thesis explores the American road genre. I argue that in addition to the automobile and the highway, a discussion of trains, boats, and walkers and their alternative roads must also be included in the genre. Each method of transportation expands the genre by adding new themes and ideas. Hobos and tramps can take to the road in search of community in order to discover more about themselves; some boatmen can use America’s racial history to discover themselves; walkers can go through a state of liminality in order to discover their internal selves. When these travelers complete their journeys, many …

Pinching And Spacing Effects On Cut Sunflower (Helianthus Annuus) Production In East Texas, Rebecca B. Burnett

Electronic Theses and Dissertations

Three experiments evaluated pinching and spacing on Helianthus annuus in East Texas to determine their effects on growth and development. Experiment 1 was designed to determine the effects of pinching nodes 1, 2, 3, or 4 on ‘Pro Cut Gold’ sunflowers. Results from experiment 1 showed non-pinched plants produced marketable stem lengths and flower sizes, while pinched plants’ stem length, stem diameter, flower diameter, and disk diameter decreased compared to the non-pinched plants. The objective for experiment 2 was to evaluate pinching and spacing treatments on ‘Pro Cut Gold’ sunflowers. All spacings for non-pinched plants in experiment 2 produced marketable …

Military Lifestyle’S Impact On Children’S Adjustment, Ashley N. Doss

Electronic Theses and Dissertations

Military families are an understudied population and the majority of research that does exist focuses on the effects of deployments on the family system. This study aims to answer the following questions: 1) “to what degree does the relationship with parents (mother and father) and military lifestyle (number of transfers and number of deployments) predict the variance in military children’s self-esteem?”, 2) “To what degree does the relationship with parents (mother and father) and military lifestyle (number of transfers and number of deployments) predict the variance in military children’s social belongingness?”, and 3) “To what degree does the relationship with …

The Impact Of Student Abroad On Intercultural Competence As A Professional Disposition: Narrative Stories From Student Affairs Professionals, Dare Chronister

Electronic Theses and Dissertations

Student affairs professionals (SAP) have been tasked to educate students and provide opportunities to develop skills to live in a culturally diverse and global society. The shortage of culturally competent SAP could hinder students’ abilities to gain intercultural competence. The purpose of this narrative non-fiction study was to understand how SAP’ study abroad experiences helped them to grow and develop intercultural competence. Furthermore, the study aimed to identify how intercultural competence shaped their practices and strategies to provide students with safe environments to gain knowledge and understanding about different cultures. Data collection included three levels of semi-structured interviews. Identified themes …

Evaluating Mine Soil Prepared By Scraper Pans For Herbaceous Plants And Pine Seedlings At An East Texas Lignite Surface Mine, Hannah Z. Angel

Electronic Theses and Dissertations

Since 1974, Luminant Mining Company, LLC (Luminant) has planted over 38.7 million trees on its reclaimed lignite surface mine operations in Texas. For decades, the use of improved reclamation techniques on Luminant’s mined lands have resulted in over 31,160 ha reclaimed to forests, wildlife habitat, and pastures with productivity levels similar to those found on unmined lands. The development of new reclamation methodologies offers opportunities to further improve productivity of planted trees at Luminant’s Martin Lake Oak Hill Mine in east Texas. The conventional haulback or ‘truck shovel’ reclamation method uses haul trucks for the selective transport and placement of …

The Moderating Effects Of Positive Religious/Spiritual Coping On Teachers’ Pain And Stress, Dawn Green

Electronic Theses and Dissertations

The objective of this internet-based survey was to investigate the effects of positive religious or spiritual coping strategies on teachers’ chronic pain reports. Teachers in the United States may represent a vulnerable group due to a high prevalence of risk factors for chronic pain conditions. Teachers have been identified to experience high stress (Johnson, et al., 2005; Kyriacou, 2001) and report poor job satisfaction (Wang, Hall, & Rahimi, 2015), which are associated with development of chronic pain conditions (Kopec & Sayre, 2004). Religious coping strategies have been associated with beneficial associations with stress and health (Reutter & Bigatti, 2014). The …

Examination And Comparison Of The Performance Of Common Non-Parametric And Robust Regression Models, Gregory F. Malek

Electronic Theses and Dissertations

ABSTRACT

Examination and Comparison of the Performance of Common Non-Parametric and Robust Regression Models

By

Gregory Frank Malek

Stephen F. Austin State University, Masters in Statistics Program,

Nacogdoches, Texas, U.S.A.

[email protected]

This work investigated common alternatives to the least-squares regression method in the presence of non-normally distributed errors. An initial literature review identified a variety of alternative methods, including Theil Regression, Wilcoxon Regression, Iteratively Re-Weighted Least Squares, Bounded-Influence Regression, and Bootstrapping methods. These methods were evaluated using a simple simulated example data set, as well as various real data sets, including math proficiency data, Belgian telephone call data, and faculty …

The Application Of Proper Orthogonal Decomposition To Numerically Modeled And Measured Ocean Surface Wave Fields Remotely Sensed By Radar, Andrew Joseph Kammerer

Electronic Theses and Dissertations

Phase-resolved ocean surface wave elevation maps provide important information for many scientific research areas (e.g., rogue waves, wave-current interactions, and wave evolution/growth) as well as for commercial and defense applications (e.g., naval and shipping operations). To produce these maps, measurements in both time and space are necessary. While conventional wave sensing techniques are limited spatially, marine radar has proven to be a complex yet promising remote sensing tool capable of providing both temporal and spatial wave measurements. The radar return from the sea surface is complex because it contains contributions from many sources only part of which provide information about …

The Roles Of Anxious Rearing, Negative Affect, And Effortful Control In A Model Of Risk For Child Perfectionism., Nicholas William Affrunti

Electronic Theses and Dissertations

Our understanding of perfectionism and its developmental trajectory and impact on children has experienced a recent growth. Research has shown that child perfectionism is associated with a number of negative outcomes including anxiety and depressive disorders, hopelessness, poor psychosocial treatment outcomes, and researchers have not found it to be associated with actual achievement. As such, research has begun to examine the developmental risk factors that predict for its development. The current study proposes utilizing a developmental psychopathology approach, one that purports a complex interaction among internal, external, risk and protective processes in the developmental of perfectionism. Specifically, the study examined …

Residuated Maps, The Way-Below Relation, And Contractions On Probabilistic Metric Spaces., M. Ryan Luke

Electronic Theses and Dissertations

In this dissertation, we will examine residuated mappings on a function lattice and how they behave with respect to the way-below relation. In particular, which residuated $\phi$ has the property that $F$ is way-below $\phi(F)$ for $F$ in appropriate sets. We show the way-below relation describes the separation of two functions and how this corresponds to contraction mappings on probabilistic metric spaces. A new definition for contractions is considered using the way-below relation.

The Dlk1-Meg3 Locus In Malignant Cells Of Proposed Primordial Germ Cell Origins., Zachariah Payne Sellers

Electronic Theses and Dissertations

Primordial germ cells (PGCs) are hypothesized to deposit hematopoietic stem cells (HSCs) along their migration route through the embryo during the early stages of embryogenesis. PGCs also undergo global chromatin remodeling, including the erasure and reestablishment of genomic imprints, during this migration. While PGCs do not spontaneously form teratomas, their malignant development into germ cell tumors (GCTs) in vivo is often accompanied by the retention of hypomethylation at the IGF2-H19 imprinting control differentially methylated region (DMR). Previous studies in bimaternal embryos determined that proper genomic imprinting at two paternally imprinted loci was necessary for their growth and development: Igf2-H19 and …

Applications Of Polarized Metallic Nanostructures., Jasmin Beharic

Electronic Theses and Dissertations

Gold nanostructures exhibit technologically useful properties when they are polarized in an electric field. In two projects we explore instances where the polarized metal can be used in real world applications. The first project involves gold nanoparticles (GNP) for use in light actuated microelectromechanical systems (MEMS) applications. Although the GNPs were originally designed for volumetric heating in biomedical applications, we treat them as a thin film coating, opening the door for these particles to be used in MEMS applications. This work characterizes the thermal properties of gold nanoparticles on surfaces for spatially-targeted thermal actuation in MEMS systems. The second project …

Self-Forgiveness In Japanese Adolescents., Tetsuo "Ted" Sato

Electronic Theses and Dissertations

The literature of forgiveness has been proliferated the last two decades (Davis et al., 2015b), but it has primarily focused on forgiveness of others and the research of self-forgiveness has just increased in recent years (Worthington & Langberg, 2012). Woodyatt and Wenzel (2013a) proposed a process-oriented approach of self-forgiveness while considering three possible responses to the self (i.e., genuine self-forgiveness, pseudo self-forgiveness, and self-punitiveness) after interpersonally offending others. Self-forgiveness among children and adolescents and in Japanese culture was discussed. The association of self-forgiveness to depressive and anxiety symptoms, and culturally and developmentally unique factors (i.e., fear of negative evaluation and …

Attending To Systemic Racism : Advancing Public Health's Approach To Youth Violence Prevention., Billie Faith Castle

Electronic Theses and Dissertations

This dissertation examines how the field of public health addresses the impact of systemic racism on health and how that informs public health’s approach to youth violence prevention. Beginning with an overview of youth violence, it breaks down the concepts of race and racism and how they are addressed within the science. It also reviews concepts that contribute to risk and protective factors of youth violence. The dissertation is written from a Critical Race Theory approach, argues that the social environment contributes to why youth violence is pervasive in certain neighborhoods, and promotes action from a macro-level approach. Seven chapters …

A Data Science Pipeline For Educational Data : A Case Study Using Learning Catalytics In The Active Learning Classroom., Asuman Cagla Acun Sener

Electronic Theses and Dissertations

This thesis presents an applied data science methodology on a set of University of Louisville, Speed School of Engineering student data. We used data mining and classic statistical techniques to help educational researchers quickly see the data trends and peculiarities. Our data includes scores and information about two Engineering Fundamental Class. The format of these classes is called an inverted classroom model or flipped class. The purpose of this study is to analyze the data in order to uncover potentially hidden information, tell interesting stories about the data, examine student learning behavior and learning performance in an active learning environment, …

The Relationship Between Trauma And Health-Related Quality Of Life In Lung Cancer Patients : The Potential Protective Role Of Mindfulness., Rene Bayley-Veloso

Electronic Theses and Dissertations

Lung cancer is the most common malignant disease worldwide, and the rapid decline in functioning due to the often-later stage diagnosis can strongly impact a patient’s health-related quality of life (HRQOL). Palliative care, with the aim of improving later-stage HRQOL, is often a main goal of treatment. Compared to other cancer types, patients with lung cancer experience the greatest amount of psychological distress during and after treatment. Prior trauma exposure, and the potentially traumatic nature of the cancer experience, can further complicate HRQOL. Mindfulness, an innate or acquired capacity for sustaining attention in the present moment with qualities of self-warmth …

Estimation Of The Three Key Parameters And The Lead Time Distribution In Lung Cancer Screening., Ruiqi Liu

Electronic Theses and Dissertations

This dissertation contains three research projects on cancer screening probability modeling. Cancer screening is the primary technique for early detection. The goal of screening is to catch the disease early before clinical symptoms appear. In these projects, the three key parameters and lead time distribution were estimated to provide a statistical point of view on the effectiveness of cancer screening programs. In the first project, cancer screening probability model was used to analyze the computed tomography (CT) scan group in the National Lung Screening Trial (NLST) data. Three key parameters were estimated using Bayesian approach and Markov Chain Monte Carlo …

Regulation Of Haplid Phenotypes In Ustilago Maydis By Ammonium Transporters And Components Of The B Mating Locus., Rena Margaret Wallen

Electronic Theses and Dissertations

Fungi that can switch from budding to a filamentous infectious state have evolved mating type loci. Ustilago maydis, the maize pathogen, must mate with compatible partners possessing different alleles at two mating type loci for successful host infection. The a locus encodes pheromones and receptors, while the b locus encodes subunits of a heterodimeric transcription factor that regulates expression of virulence genes. Mating is triggered by environmental signals, including nutrient deprivation. My goal was to determine the fate of nitrogen starved haploid cells without a compatible mating partner. On solid low ammonium media, wild-type U. maydis filaments. I examined …

Interaction Style Of Mothers Of Young Children With Williams Syndrome And Relations With Child Expressive Vocabulary., Danielle R. Henderson

Electronic Theses and Dissertations

Children of a given age vary widely in their expressive vocabulary abilities. One factor that is related to child expressive vocabulary ability is the style in which the mother interacts with her child. Studies that have considered this relation for either typically-developing (TD) children or children with developmental or intellectual disability (DD/ID) (e.g., autism spectrum disorder, fragile X syndrome) have shown that children whose mothers have a more sensitive/responsive interaction style have significantly larger expressive vocabularies than do children whose parents have a less sensitive/responsive style (e.g., Baker et al., 2010; Belsky et al., 2007; Brady et al., 2014; NICHD …

Mechanism Investigation Of Pseudouridine Synthases Trub And Rlua With Rna Containing 5-Fluorouridine And 4-Thiouridine., Uyen T. Duong

Electronic Theses and Dissertations

Pseudouridine synthases (Ψ synthases) are the enzymes that catalyze the isomerization of uridine (U) to pseudouridine (Ψ), which is the most prevalent post-transcriptional modification of RNA. The Ψ synthases fall into six different families that share no significant global sequence similarity; however, they all involve a conserved aspartic acid residue which is absolutely essential for activity. Tyrosine is a conserved residue in the active site in five of the six families of Ψ synthases (phenylalanine in the TruD family) and was hypothesized as the general base for the isomerization reaction. To confirm the function of Tyr-96, Y96F RluA was assayed …

Piezoelectric Bistable Buckled Beam Energy Harvester., Brian Edward Allgeier

Electronic Theses and Dissertations

A novel energy harvesting device design is presented to be created via microfabrication techniques. Such devices have countless applications for powering low-current electrical devices, especially wireless sensors or transmitters. This micro-electromechanical system (MEMS) design utilizes the piezoelectric response of a bistable buckled beam to gather electrical energy via ambient vibrations. While many traditional piezoelectric energy harvesters (PEH) consist of simple cantilever beam geometries, this nonlinear design utilizes inertial effects of torsional lever arms to actuate a central buckled beam to snap between its two stable states; such an abrupt strain on the piezoelectric beam potentially produces a significantly increased electrical …

Novel Insight Into The Liver-Lung Axis In Alcohol-Enhanced Acute Lung Injury., Lauren G. Poole

Electronic Theses and Dissertations

Background. Individuals who chronically abuse alcohol are almost 4 times more likely to develop Acute Respiratory Distress Syndrome (ARDS), the most severe form of Acute Lung Injury (ALI), but the mechanisms by which alcohol abuse sensitizes the lung to injury are poorly understood. However, the lung appears to share many parallel mechanisms of injury with the liver- a primary target of alcohol abuse. The overarching goal of this dissertation was therefore to expand on established mechanisms of alcohol-induced liver injury to ask innovative questions about mechanisms of alcohol-enhanced acute lung injury, as well as to develop new tools that may …

The Mark Of The Devil : Medical Proof In Witchcraft Trials., Sarah Dunn

Electronic Theses and Dissertations

This thesis examines the use of physical evidence to prove the identity of witches in witchcraft trials from approximately 1300 to 1650 in Western Europe. Throughout this period, trial records for accused witches and witchcraft texts include references to Devil marks. According to contemporary texts, these were physical marks on witches, which were visible to the human eye. Doctors and midwives verified these marks upon examination of the accused witch’s body. In this instance, medical proof in the courtroom verified supernatural powers. This thesis will analyze the intersection between medical and religious beliefs in the fourteenth through seventeenth centuries to …

Comparing Total Expenditures By Source Of Long-Term Services And Supports., Maresa R. Corder

Electronic Theses and Dissertations

This study compares total expenditures between beneficiaries enrolled in traditional Long-Term Care (LTC) and beneficiaries enrolled in Home and Community Based Services (HCBS) in a Quasi-Experimental Simple Ex Post Facto study utilizing multiple linear regression with inverted propensity score weighting. The results demonstrated, during the two years of the study period, that total expenditures were on average $14,565.03 (with a p-value oflessfor the total two years of the study, for HCBS beneficiaries when compared to their LTC counterparts. There remains today a belief that expenditures of elderly, dual beneficiaries electing to age-in-place for supported self-care expend less than that of …

Bayesian Approach On Short Time-Course Data Of Protein Phosphorylation, Casual Inference For Ordinal Outcome And Causal Analysis Of Dietary And Physical Activity In T2dm Using Nhanes Data., You Wu

Electronic Theses and Dissertations

This dissertation contains three different projects in proteomics and causal inferences. In the first project, I apply a Bayesian hierarchical model to assess the stability of phosphorylated proteins under short-time cold ischemia. This study provides inference on the stability of these phosphorylated proteins, which is valuable when using these proteins as biomarkers for a disease. in the second project, I perform a comparative study of different confounding-adjusted to estimate the treatment effect when the outcome variable is ordinal using observational data. The adjusted U-statistics method is compared with other methods such as ordinal logistic regression, propensity score based stratification and …

Characterization Of Filifactor Alocis And Its Immune Evasion Strategies Employed Against Human Neutrophils., Cortney Linn Armstrong

Electronic Theses and Dissertations

Periodontal disease is among the most common of inflammatory conditions and is caused by bacterial and host derived factors. The presence of bacteria drives the recruitment of neutrophils, professional phagocytes, to migrate to specific oral sites where they produce potent antimicrobials to kill their target. However, this inflammation and production of antimicrobials must be strictly regulated to minimize collateral host tissue damage. Human neutrophils recognized the oral pathogen Filifactor alocis through Toll-like receptor (TLR) 2 and upon binding, activated both p38 MAPK and ERK signaling pathways, known to be involved in neutrophil cell migration and degranulation. F. alocis also stimulated …

Exploring The Barriers To Effective Federal Flood Mitigation In The Mississippi River Region., Linda Kay Bailey

Electronic Theses and Dissertations

This dissertation is a comprehensive study of flood mitigation in the Mississippi River region as it is impacted by federal flood policies and programs. The study begins with a historical narrative of flooding events and flood mitigation that provided the impetus for federal flood mitigation in the late 1920s. The historical narrative sheds light on issues related to federalism, path dependency, dynamic growth, and socio-culture influence during the development of flood mitigation policy. Growth machine theory is used to describe how inequality and disparate access to political power has worked to exacerbate flood disaster outcomes and how this dynamic is …

Characterizing Reactive Glutamines In Fibrinogen And Elucidating Factor Xiii Substrate Specificity., Kelly Njine Mouapi

Electronic Theses and Dissertations

Fibrinogen is the most abundant protein involved in blood coagulation and has been associated with many pathological implications in cardiovascular disease. At the final stages of blood clot formation, the transglutaminase Factor XIIIa introduces γ-glutamyl-ε-lysinyl covalent bonds between reactive glutamines and lysines in fibrin, which results in a tighter clot network that is resistant to fibrinolysis. Factor XIIIa crosslinks specific reactive glutamines on fibrinogen, selecting more reactive glutamines in the αC region of fibrinogen than any other chain. Although crosslinking pairs in the αC region have been identified, little is known about the extent of crosslinking and the role played …