Digital Commons Network^™

Impacts Of Cover Crops And Diversified Crop Rotations On Soil Biochemical Properties, Hydrophysical Characteristics, And Water Dynamics In Long-Term No-Till Cropping Systems, Sainfort Vital

Electronic Theses and Dissertations

This research assessed the impacts of crop rotations and cover crops on the soil's biochemical and hydrophysical properties within long-term no-till systems. The research was conducted at the Southeast Research Farm, near Beresford, South Dakota. The crop rotations contain two levels: 4-year corn (Zea mays L.)-soybean (Glycine max L.)-oat (Avena sativa L.)-rye (Secale cereale L.) (CSOR) and 2-year corn-soybean (CS) rotations. The cover crop factors also had two levels within each rotation treatment: cover crops (CC) and no cover crops (NCC). All plots were managed under long-term no-till (NT), with soils mapped as Egan silty clay loam (fine-silty, mixed, superactive, …

Methods For Optimizing Detection And Evaluating Habitat Use Of North American River Otters In South Dakota, Jessica Speiser

Electronic Theses and Dissertations

North American river otters (Lontra canadensis) play a critical role as an apex predator in riverine ecosystems. A challenging species to survey using traditional methods, they remain understudied in non-forested regions, such as the Northern Great Plains, where habitat degradation and landscape fragmentation may reduce habitat quality and availability and disrupt landscape connectivity. This thesis aims to improve detectability and investigates the habitat use of river otters in South Dakota to better understand habitat needs of otters and improve their continued recovery and management. My first chapter provides a brief overview of river otters and their ecological roles in freshwater …

Isolation, Molecular Characterization, And Epidemiological Analysis Of An Emerging Avian Metapneumovirus Subgroup B In Us Poultry, Sumit Jangra

Electronic Theses and Dissertations

Avian metapneumovirus (aMPV) is one the most economically important poultry respiratory pathogens belonging to the family Pneumoviridae and genus Metapneumovirus, which can affect both domestic and wild birds. aMPVs are classified into four subgroups (A, B, C, and D) based on the level of genetic variations and antigenic differences. aMPV causes turkey rhinotracheitis (TRT) and swollen head syndrome (SHS) in turkeys and chickens respectively. Recently, outbreaks of respiratory disease in meat-type birds and a significant decline in egg production with respiratory signs in breeders were reported from different states in the USA. Isolating aMPV is challenging as it is a …

Respiratory Disease In Bighorn Sheep: A Varied Investigation Of Immunization, Transmission, And Detection, Katelin Frerichs

Electronic Theses and Dissertations

Respiratory disease has historically been recognized as a limiting factor to wild bighorn sheep (Ovis canadensis) herds throughout North America with epizootics resulting in large-scale die offs and reductions in recruitment. The primary etiologic agent associated with pneumonia outbreaks in bighorn sheep is Mycoplasma ovipneumoniae. This bacterial pathogen is frequently carried asymptomatically by domestic sheep (Ovis aries) and goats (Capra hircus); however, when these domestic hosts come in contact with and spread this pathogen to bighorns, the disease can cause epizootics and large-scale mortality. Domestic sheep strains are more commonly detected in bighorn sheep than domestic goat strains, and previous …

Lidar Remote Sensing And The Monitoring Of Brazilian Amazon Forest Structure: Tackling Issues And Finding New Possibilities, Pedro Valle De Carvalho E Oliveira

Electronic Theses and Dissertations

The Amazon is the largest tropical forest in the world and around 60% of it is in Brazil. The amount of carbon stored in the region uncertain, the impacts of land use and climate changes are unknown, and what drives the dynamic of the forest structure is still under a heated debate. Optical remote sensing has been used for a long time to assist the monitoring of the Brazilian Amazon. However, optical remote sensing only allows a comprehensive study from the top of the forest canopy. In contrast, lidar remote sensing of forests can produce robust information regarding the canopy …

Understanding The Psychological Significance Of Astrology In Millennial Women's Lives, Rachel June Floyd

Electronic Theses and Dissertations

In North America, astrology has been experiencing a resurgence in popularity. This is immediately remarkable given that the United States and Canada are industrialized, modern societies where astrology is widely lamented as a pseudoscience. This dissertation presents a phenomenological exploration of the underlying reasons for this cultural trend, particularly among the demographic that uses it most: millennial women. Existing psychological literature on astrology is primarily dominated by correlational studies or historical analyses and lacks the depth and richness of direct experiences of individuals engaging with this phenomenon. This study sought to address this gap within psychological literature specifically, by conducting …

The Implications Of The Halogen Atom On The Physical Stability Of Amorphous Solid Dispersions, Mustafa Bookwala

Electronic Theses and Dissertations

Amorphous solid dispersions (ASD), although a promising formulation strategy for poorly water-soluble drugs, are susceptible to rapid, spontaneous recrystallization owing to their metastable nature. Non-covalent interactions (NCI) between the drug and polymer are known to help prevent ASD physical destabilization. Conventionally, hydrogen-bonding (H-bonding) is considered important for ASD formation and persistence. However, carbon-bound halogen atoms, which are frequently present on drug molecules and can form specific halogen-bonds (X-bond) with the polymer, remain relatively unexplored with respect to their ability to stabilize ASDs. It was, therefore, hypothesized that the presence of a peripheral Br on bromopropamide, and Cl on chlorpropamide will …

Functional Cynicism, Michelle Fried

Electronic Theses and Dissertations

Trait cynicism, or “cynical hostility” as measured by the Minnesota Multiphasic Personality Inventory’s Cook-Medley Scale, is defined and studied as characteristics associated with psychopathology, interpersonal conflict, and negative health outcomes including heart disease and cognitive decline. Likewise, “organizational cynicism” is operationalized in industrial/organizational psychology for the purpose of describing and identifying an undesirable employee type in the workplace. This research proposes an alternative assessment. It reconnects cynicism with its roots in ancient philosophy by asking if cynical attitudes, despite their negative valence ascribed in the modern literature and conventional opinion, may serve a practical purpose. This study of Functional Cynicism …

Using A Three-Dimensional Theoretical Orientation Matching Model To Predict Therapeutic Outcomes, Daniel Rhodes

Electronic Theses and Dissertations

Matching helpers and clients in a therapeutic setting is inefficient and ineffective. So far, there are no significant and enduring variables that reliably match helpers and clients that lead to positive therapeutic outcomes. This study attempts to match helper and client using theoretical orientation. It uses a quantitative methodology to predict therapeutic outcomes given match quality in the therapeutic dyad. Participants were 30 dyadic pairs—consisting of one helper and one client—who had a pre-existing therapeutic relationship. Each was given an assessment tool, used to measure their theoretical orientation to psychotherapy. Results showed no statistically significant relationships between theoretical orientation match …

Interactive Effects Of Sublethal Concentrations Of Fracking Biocides And Abandoned Mine Drainage On Amphipod Behavior, Kelly Lenhart

Electronic Theses and Dissertations

This thesis examined the sublethal effects of three pollutants, namely glutaraldehyde, 4,4-dimethyloxazolidine (DMO), and abandoned mine drainage (AMD), on amphipods. The primary objective was to investigate their combined effects on amphipods. The three pollutants, despite having the potential to combine in the environment, have not been studied to determine their potential for detrimental interactive effects which could result in unexpected environmental damage.

The research employed a series of experimental setups involving controlled exposure of amphipods to varying, putatively sublethal, concentrations of the chemicals of interest. Subsequently, effects were assessed via both behavioral and feeding assessments. To facilitate this analysis, novel …

Understanding The Cultural Perceptions And Beliefs Of Law Enforcement About Officer Wellness: A Focused Ethnography, Carrie Hintz

Electronic Theses and Dissertations

Law enforcement is recognized as one of the most stressful and high-risk occupations in the world. This study explored the cultural perceptions, beliefs, and values of law enforcement officers (LEOs) about their wellness. Methodology: This focused ethnography included observations and individual interviews of LEOs in the state of Nevada, USA. Leininger’s four phases of qualitative data analysis were used to analyze the data. Results: Thirty-one LEOs participated, representing 7 law enforcement agencies. Three themes were identified: 1) the badge is omnipresent in officers' lives, affecting every aspect of their world; 2) a balanced approach to officer health is important; …

Role Of The Anti-Viral Immune Response In Neural Cell Modulation And Neurological Sequelae Of Childhood Viral Infections, Yashika Kamte

Electronic Theses and Dissertations

Viral infections of the central nervous system (CNS) often result in neurological sequelae and are considered a risk factor for the development of neurological disease. Moreover, the outcomes of a viral infection are largely dependent on the age of the host, with younger hosts developing more profound neuropathology. Perhaps the developing brain coupled with an immature immune system contributes to worse outcomes in the very young. Children suffering from brain infections are more prone to develop enduring neurological impairments even after recovery from the infection. Although majority of the brain growth occurs in utero, neurodevelopment continues throughout the juvenile …

Comparative Functional And Genomic Analysis Of Protein Targets Of Sexual Selection In Primates, Brianna Ports

Electronic Theses and Dissertations

Sexual selection is driven by the differential reproductive success of individuals, which is influenced by competition for mates and mate choice. In primates, this selective pressure has been attributed to the development of distinct anatomical, physiological, and behavioral characteristics. By employing comparative functional and genomic methodologies, this study aimed to assess the repercussions of primate sexual selection. To better understand the mechanisms driving sexually selected traits, an unbiased genome-wide analysis was used to associate rates of protein evolution with relative testes size and sexual size dimorphism. While previous research focused on the rapid evolution of male reproductive proteins in response …

Population Trends And Trophic Ecology Of The Invasive Peacock Eel (Macrognathus Siamensis) In The Florida Everglades, Grace Kahmann

Electronic Theses and Dissertations

Invasive species threaten the ecological integrity of ecosystems worldwide, including the Florida Coastal Everglades. This study investigated the ecological role of the peacock eel (Macrognathus siamensis) within this ecosystem, emphasizing its population trends and the environmental factors that affect its population performance, and the potential for interactions with native fish assemblages and coastal food webs. I used 19 years of electrofishing data to investigate the population trends of peacock eels at the marsh-mangrove ecotone of the Shark River Estuary, Everglades National Park (Florida, USA). I found that peacock eel populations have increased since their first detection in 2002, and their …

La Fiesta Del Espiritu Santo: An Original Work For Choir, Soloists, And Small Ensemble Influenced By The Santeria Music Of The African-Dominican Community In The Dominican Republic, Rafael Scarfullery

Electronic Theses and Dissertations

ABSTRACT

This study examines the role of Santería music as practiced by African Dominicans in Villa Mella, a neighborhood of Santo Domingo, Dominican Republic. This musical tradition comes from the culture and religion of the Yoruba people who were brought as slaves from Africa, and features complex drum rhythms and call-and-response chants. This paper deals with the historical and social context of Santería music within the Dominican Republic, but its principal objective is to adopt the musical language of this tradition and use it to create a new contemporary work for mixed choir and small ensemble.

One of the most …

Ethanol Dysregulates Sirt1-Mediated Lipogenic Signaling Pathways Through Α4*-Nicotinic Acetylcholine Receptors In Hepatocytes., Caitlin Christina Wilkerson

Electronic Theses and Dissertations

Alcohol-associated liver disease (ALD) is a broad spectrum of diseases ranging from steatosis to severe hepatic cirrhosis, none of which have any FDA approved therapies. Downregulation of hepatic Sirtuin 1 (Sirt1) activity by ethanol has been shown to lead to an upregulation of the pro-lipogenic gene targets under its jurisdiction, resulting in increased lipogenesis and triglyceride accumulation. It was hypothesized that ethanol acts on α4*-nicotinic acetylcholine receptors (α4*-nAChRs) in hepatocytes to decrease Sirt1 expression, which ultimately dysregulates lipid metabolic homeostasis. Ethanol’s effects were investigated in cultured AML12 hepatocytes and in WT primary mouse hepatocytes acutely exposed to ethanol. Consistent with …

Assessment Literacy Influenced By Administrator Identity And Professional Learning Confident Administrators Within Kentucky Independent School Districts., Amy J. Harris

Electronic Theses and Dissertations

The purpose of this qualitative phenomenological study is to gain greater understanding surrounding how administrators in northern Kentucky Independent School Districts describe their own experiences with assessments (assessment literacy). In addition, this study sought to gain knowledge from administrator experiences which may or may not have contributed to their confidence as leaders of assessment literacy. The context of this study was with the 11 Independent School Districts in the Northern Kentucky region, specifically with school level administrators. The significance of this study is to inform teacher preparation programs and current administrators of how and why individual self-efficacy and professional learning …

Quantification Of Tumor Biophysical Heterogeneity Through Mechanical And Ultrastructural Analysis., Bradley James Mahaffey

Electronic Theses and Dissertations

Glioblastoma (GBM) is a highly invasive, aggressive brain cancer that carries a median survival of 15 months. This poor prognosis is due, in part, to its resistance to standard therapeutic intervention. Recent studies have demonstrated that tumor heterogeneity plays a critical role in facilitation therapy resistance by mediating tumor adaptation through microenvironmental cues. Efforts to describe these microenvironmental differences may aid in the development of strategies to combat resistance. GBM can be separated into two distinct regions – a core and a rim, which are thought to drive specific aspects of tumor evolution. The core is proliferative as evidenced by …

Enhanced Content-Based Fake News Detection Methods With Context-Labeled News Sources, Duncan Arnfield

Electronic Theses and Dissertations

This work examined the relative effectiveness of multilayer perceptron, random forest, and multinomial naïve Bayes classifiers, trained using bag of words and term frequency-inverse dense frequency transformations of documents in the Fake News Corpus and Fake and Real News Dataset. The goal of this work was to help meet the formidable challenges posed by proliferation of fake news to society, including the erosion of public trust, disruption of social harmony, and endangerment of lives. This training included the use of context-categorized fake news in an effort to enhance the tools’ effectiveness. It was found that term frequency-inverse dense frequency provided …

Publication Of Undergraduate Experiments, Development Of Additional X-Ray Crystallography Experiments, And Proof-Of-Concept Cyclopropanation Reactions, Alain Beauparlant

Electronic Theses and Dissertations

Single crystal X-ray crystallography instructional materials were developed using a variety of compounds including sugar, Epsom salt, pyrite, copper(II) acetate, and rhodium(II) acetate. Rhodium(II) acetate was reacted with a variety of functionalized benzonitriles, and when crystals were obtained, characterized using single crystal X-ray crystallography. Rhodium(II) acetate with adducts of 4-nitrobenzonitrile and 4-(dimethylamino)benzonitrile were also characterized using proton NMR spectroscopy and Fourier Transform Infrared Spectroscopy. Rhodium(II) acetate with adducts of 4-(dimethylamino)benzonitrile was used as a catalyst in a proof-ofconcept reaction to determine if it acts as a catalyst in cyclopropanation reactions. Further, the new rhodium(II) acetate dinitrile compounds were investigated to …

Isotopic Ecology Of Bison And Bootherium At Big Bone Lick, Kentucky, Frances Stephenson

Electronic Theses and Dissertations

Big Bone Lick (BBL) is a late Pleistocene and Holocene fossil locality in the Ohio River valley of Kentucky. This study utilized stable isotopes (δ¹³C, δ¹⁸O, and ⁸⁷Sr/⁸⁶Sr) in tooth enamel to reconstruct mobility and diet in Bison, as well as diet in Bootherium bombifrons. Isotopic results from seven Bison and two B. bombifrons are reported. Results suggest Pleistocene Bison and Bootherium occupied different dietary niches. Although both had C3-dominated diets, Bison occupied more open environments than B. bombifrons. Two bison from the late Holocene deposit had diets that consisted …

The Impact Of Aces On College Students And Their Major Choice, Britten Harrison

Electronic Theses and Dissertations

Research examining Adverse Childhood Experiences (ACEs) has mostly focused on the long-term effects of these experiences on adult mental and physical health. Less attention has been focused on the impact of ACEs on college student satisfaction, dropout rates, and major choice. The overarching questions for the current study sought to further research by (1) assessing if there is a relationship between the ACE scores of college students and their mental and physical health, (2) if ACEs play a role in student satisfaction or desire to drop out, and (3) determining if there is a connection between students with high ACE …

School Nurses And The Sexual Health And Education Of Public-School Students In Tennessee, Amy Wake

Electronic Theses and Dissertations

Tennesseans have been experiencing increasing rates of sexually transmitted diseases since the year 2000. Those rates are highest among those 15- to 24-year-olds. At the same time, Tennessee policy requires the teaching of abstinence as the primary form of sexual health education and emphasized the use of abstinence-only curriculum. The school nurse represents an available resource in the Tennessee public schools. The purpose of the qualitative study was to explore, describe, and interpret the perceptions and experiences of public-school nurses from rural, suburban, and urban areas of Tennessee related to the sexual health and sexual health education of students. School …

Covid-19 Vaccine Uptake In The Hispanic And Latinx Communities Of Northeast Tennessee, Gabriela Abrego

Electronic Theses and Dissertations

This work addresses the underlying issues surrounding COVID-19 vaccine uptake in Hispanic and Latinx communities in the Northeast region of Tennessee. A qualitative, phenomenological research approach was used to conduct interviews and data from the interviews was used to inform a survey instrument. The interview guide in the qualitative phase of the study was based on the Health Belief Model (HBM) developed by Rosenstock (Rosenstock, 1974). A quantitative approach was then used by piloting the survey instrument in the study population. Common themes found through the interviews were: previous negative experience with COVID-19 vaccination, previous negative experience as a result …

Crossing The Pond: The Influence Of Southern Appalachian Old-Time On Contemporary Irish Music, Amanda Morgan

Electronic Theses and Dissertations

Numerous studies examine Irish traditional music influencing old-time music, but few examine the influence of old-time on contemporary Irish. As our societies become more global, folk music travels faster and becomes more open to influence. Thes influences can be heard in the music of “Alfi” and “Lankum,” two ensembles steeped in Irish traditional music.

This study defines common musical elements of old-time and examines the use of those elements in two recordings: Alfi’s, “Jubilee” and Lankum’s, “The Old Man from Over the Sea.” Much of my data comes from interviews with Irish and American musicians and my own professional knowledge, …

Assessing Virtual Versus In-Person Experiential Learning And Medical High-Fidelity Simulation In Medical Student Pediatric Clerkship Training, Andrew Mitchell Berry

Electronic Theses and Dissertations

Simulation and experiential training have been incorporated into medical school training for decades. The utilization of medical simulations has become an invaluable tool in healthcare education and training. However, circumstances such as limited resources, geographical constraints, or global health crises may hinder the feasibility of conducting in-person medical simulations. In these scenarios, virtual medical simulations emerge as a compelling alternative. While there are many ways to accomplish experiential-based learning, many faculty and students feel Socratic learning styles provide the best learning experience.

As medical students had just finished a predominantly virtual preclinical year due to the COVID-19 pandemic, the research …

Special Education Teachers’ Emotional Well-Being And Work-Related Stressors In The School Environment, Mallory J. Laravie

Electronic Theses and Dissertations

There is little to no research regarding novice elementary special education teachers (SETs) and their emotional well-being while in the school environment. The goal of this work is to illuminate special education teacher’s voices missing in previous research. Additionally, this research examines the impact of work-related stressors on novice elementary SETs' emotional well-being in the school environment. The theoretical perspective of heuristics is used to illuminate a problem or answer a question about the lived experience of the researcher. Lazarus and Folkman’s (1984) transactional theory of stress and coping framework guided the research question development, data analysis, and presentation of …

Project: Mhealth Applications For Educating Community Nurses, Nkemdilim Stacy Egbo

Electronic Theses and Dissertations

Hypertension is a chronic health condition linked to high morbidity and mortality rates in America and around the world. Hypertension care in developing and underdeveloped countries requires quick intervention. The proliferation of smart technologies and mobile health applications offer some leverage for the alternative management of hypertension, but evidence related to effectiveness in Nigeria are limited. The purpose of the study was to assess the impact of m-Health apps on hypertension self-management through nurses’ education in Southern region of Nigeria, as well as their self-confidence or efficacy using the Hypertension Evaluation of Lifestyle Management assessment. A quasi-experimental pretest-posttest design was …

Competencies Texas A&M Agrilife Extension Agents Need To Manage Conflict In Master Gardener Programs, Jayla Brook Fry

Electronic Theses and Dissertations

Texas A&M AgriLife Extension agents manage volunteer programs with vast efforts in public education. Volunteer programs such as the Texas Master Gardener program are significant to the public because they provide a service by educating people in horticulture and related topics. Extension agents oversee volunteer programs such as the Master Gardener program. The Texas Master Gardener program is comprised of more than 9,000 volunteers who give over 500,000 hours of service to their communities. When there are misaligned goals or personality conflicts, it may impact the program’s mission and educational efforts. Extension agents must manage those situations to retain the …

Intergenerational Factors That Contribute To Millennial Church Engagement, Parker Sanderson

Electronic Theses and Dissertations

Millennial church attendance has declined since the beginning of the new millennium. Intergenerational ambivalence has been known to contribute to this phenomenon. Through this action research, the researcher sought to determine what intergenerational factors have led to millennials’ continued or discontinued attendance within churches. A phenomenological qualitative approach centered around interviews for this study was used to determine these intergenerational factors. The sample was taken from a 1,100-member church in a major Texas metropolitan area. The goal was to help church leaders decrease relational distancing and reduce ambivalent factors to increase millennial engagement in this local congregation.