Kinesiology Department Chairs’ Perceptions Of Their Training And Preparation, Kason O’Neil

Electronic Theses and Dissertations

Department chairs are responsible for leading academic departments in higher education.  These individuals regularly make important decisions regarding such things as managing faculty and academic programming, overseeing budgets, and supporting student needs. Despite these responsibilities, many people become department chairs without receiving formal leadership training. This study explored how kinesiology department chairs across the United States viewed their preparation for the role and the importance of leadership training. A total of 111 department chairs completed an online survey about their background, previous training, and the importance of training for different administrative responsibilities. The results showed that most chairs had little …

Exploring Competitive Dynamics Between Pseudomonas Baetica And Salmonella In A Polymicrobial System, Braxton E.M. Stout

Electronic Theses and Dissertations

The global rise in antimicrobial resistance has catalyzed a greater focus on polymicrobial research aimed at characterizing microbial interactions and uncovering new therapeutic strategies. Though it has long been of interest, environmental soil-derived bacteria remain largely under-represented in research and thus uncharacterized in this field. This project aimed to identify soil microbes that display inhibitory mechanisms to potential nosocomial pathogens. Soil sample S1S3-2 displayed inhibitory phenotypes toward numerous bacteria and was identified as Pseudomonas baetica. In both planktonic and biofilm growth, P. baetica was able to inhibit Salmonella arizonae through a contact-dependent and temperature-dependent manner. Screening of a transposon insertion …

Leveraging Mammal Mycophagy To Determine Environmental Drivers Of Truffle Diversity, Brittany Hartsock

Electronic Theses and Dissertations

Many mycorrhizal fungi are hypogeous (truffle-forming), producing underground fruiting bodies. Studying truffles is inherently challenging due to their hidden nature. However, mycophagous mammals provide a unique opportunity to study hypogeous fungi because they rely on truffles as a food source. Although several truffle species have recently been described in the southern Appalachian region, their fruiting patterns remain poorly understood. To address this, we quantified truffle richness and spore loads from 670 Peromyscus scat samples collected across 42 sites spanning an environmental gradient during 2024 in the Blue Ridge Mountains of East Tennessee. We found that truffle richness and spore abundance …

Trophic Ecology Of A South Carolina Estuarine Predator Guild, Shane John Molander

Electronic Theses and Dissertations

Estuaries are among the world’s most productive ecosystems in the world and are characterized by the convergence of two distinct habitats, creating a mosaic of environmental conditions from inland rivers to the nearshore ocean. Many fishes occupy estuaries during various life stages for growth, reproduction, or foraging, and may reside in them seasonally. The co-occurrence of species, particularly upper-trophic level carnivores, can result in competitive interactions for prey resources within a shared environment. Identifying the degree of these interactions as well as understanding basal energy consumption can inform food web dynamics and how overlapping species use shared spaces. I used …

Three-Dimensional Cell And Nuclear Geometries Inform Tissue Level Fluid Mechanics During Epithelial Remodeling, Liam Joseph Russell

Electronic Theses and Dissertations

During epithelial remodeling, mechanical and molecular programs must coordinate to drive the cell shape changes that enable new tissue topologies. Dynamic morphogenesis requires epithelia to preferentially exhibit solid- or fluidlike properties depending on developmental and biophysical constraints. Convergent extension in the Drosophila germband epithelium is one such remodeling event, during which the lateral ectoderm lengthens by two-fold along the primary body axis while concomitantly shortening orthogonally. This process is an incredibly dynamic and attractable system for studying tissue morphogenesis mechanics in vivo.

Germband extension is driven by oriented cell intercalation through T1 transitions, where cells directionally interdigitate with one another …

Investigating Caveolar Systems: Spatiotemporal Quantification Of Caveolin-1 And The Mechanotransducive Function Of Ehd2, Jasper Stanae Farrington

Electronic Theses and Dissertations

Caveolae are 50-100nm cholesterol rich flask shaped invaginations found in many differentiated cells. Namely, these structures have been seen to be abundant in endothelial cells where they are involved in many signaling contexts. However, under mechanical stress, the characteristics of caveolae alter, flattening to increase membrane compliance, while displaced proteins can shift from structural roles to mechanosensitive signaling functions. Caveolin-1 (Cav1) is the principal protein required for Caveolar formation while Eps15 Homology Domain Containing Protein 2 (EHD2) is a membrane ATPase that acts to stabilize caveolae at the surface. Despite their emerging importance, understanding the organization and dynamic regulation of …

Exploring Foundations Of Animal Host-Microbe Interactions In A Freshwater Sponge, Jacob S. Pawley

Electronic Theses and Dissertations

The most ancient eukaryotic immune defense mechanisms evolved in unicellular species. Multicellular eukaryotes, however, expanded these mechanisms to meet challenges unique to multicellular life, including barrier formation, long-distance cell signaling, and coordinated responses that eliminate microbial threats while minimizing damage to the host. As such, animal immune signaling pathways are exceptionally intricate and diverse. Though, most of what is understood about animal host–microbe interactions stems from a small handful of model systems. Here, I evaluate host–microbe interactions and innate immunity in sponges using the highly tractable freshwater sponge, Ephydatia muelleri. I report the discovery of an external host-derived matrix …

Testing P300-Based Biometric Authentication Paradigms, Jordan Razzak

Electronic Theses and Dissertations

Bench research suggests that P300 amplitude is greater in response to self-relevant stimuli compared to familiar stimuli. This effect could enable a novel method of biometric authentication based on the self-relevant P300. This dissertation aims to: (1) determine the optimal presentation paradigm for leveraging self-relevance in P300-based biometric authentication, and (2) investigate P300 responses from self-relevant stimuli versus stimuli learned over the course of a week.

Two presentation paradigms were compared – rapid serial visual presentation (RSVP) and matrix presentation (MP). Participant-specific RSVP and MP classifiers were trained by applying stepwise linear discriminant analysis to data collected during presentations of …

An Evaluation Of Peer Mentoring In A Pre-Veterinary Science Program Within A College Of Forestry And Agriculture, Amy Neal

Electronic Theses and Dissertations

Mentoring is a tool utilized to improve the retention of college students and can serve as an effort to increase their willingness to persist despite challenges. Establishing mentoring relationships amongst first-year students and more-experienced students can create a sense of belonging. Mentorship programs may be developed within a particular major or program. Within this study, an online survey was formed to analyze the perceptions of first-year pre-veterinary students in Fall 2024 and Fall 2025. A peer-mentorship program was implemented amongst pre-veterinary students in Fall 2025. First-year students who completed the survey in Fall 2024 were not mentored. Many of the …

Forest Cover Effects On Canopy Interception Loss, Evapotranspiration, And Soil Infiltration On Stormwater Detention Basins, Alexandria N. C. Perez

Electronic Theses and Dissertations

Developing cities and increased impervious surfaces has resulted in more surface runoff and severe flooding. Harris County, Texas has experienced major flooding events, such as Hurricane Harvey in 2017 which was estimated to be a 9,000-year flood event. The Harris County Flood Control District (HCFCD) is dedicated to creating, maintaining, and finding new ways to reduce flooding damage such as the use of detention basins as green infrastructure. These basins are either populated by grass or are planted with various tree species. This study will identify the planted trees’ canopy interception loss, reference evapotranspiration, and enhanced soil infiltration effects within …

Examining Pain Catastrophizing, Mental Toughness, Self-Efficacy, And Perceived Pain In The Performance Of Female Athletes During Their Menstrual Cycle, Carissa R. Martinez

Electronic Theses and Dissertations

Pain is a universal unpleasant or negative experience influenced by physiological, psychological, and environmental factors. Disruption in the neural pathways of pain can affect athletic performance and lead to injury risks. Both negative attributes, such as stress, anxiety, and depression, and positive attributes, such as mental toughness and self-efficacy, contribute to pain perception and catastrophic thinking. The menstrual cycle also plays a critical role in pain catastrophizing, as hormonal fluctuations across different phases may hinder pain perception and performance in female athletes. However, research lacks the inclusion of how these factors impact female athletes. Using a non-experimental quantitative analysis, this …

A Geometric Morphometric Analysis Of Acetabular Shape Variation Across Bat Families, Jordan L. Huff

Electronic Theses and Dissertations

Bats are the only mammals capable of powered flight, and research is concentrated on this adaptation. Their non-flight locomotion has received comparatively little attention. Previous studies show that non-flight locomotor behaviors vary across families. Members of Pteropodidae are efficient climbers but cannot effectively walk, whereas Phyllostomidae and Vespertilionidae are better at terrestrial locomotion but show reduced arboreal capabilities. The non-flight locomotion of Hipposideridae and Rhinolophidae is less understood, although rhinolophids exhibit limited terrestrial locomotion. This study examined whether differences in locomotor behavior are associated with variation in acetabular morphology. A geometric morphometric analysis of acetabular shape was conducted across multiple …

Examining Individual Representation In Asian Elephants (Elephas Maximus): Implications For Recognizing Familiarity And Presence Of Conspecifics, Elena Lawson

Electronic Theses and Dissertations

Elephants’ flexible cognitive abilities and fission-fusion societies make them an excellent study species to investigate individual social recognition. Despite the substantial role chemical cues play in elephant social communication, there is a considerable lack of research into their chemosensory social recognition, especially in Asian elephants (Elephas maximus). Using two-choice tests, I assessed Asian elephants’ chemosensory ability to discriminate between individuals by both presence and familiarity. I also used a habituation-discrimination paradigm to assess individual recognition in elephants by determining whether elephants integrate odor cues (i.e., urine and feces) to form multi-cue representations of individuals. Responses between samples were …

A Computational Micropatterning Approach To Study Caveolae And Protein Localization In Vascular Biology, Andrew B. Grespin

Electronic Theses and Dissertations

Caveolae are specialized, flask-shaped membrane invaginations highly expressed in endothelium and dysregulated in atherosclerosis. Caveolae play a central role in buffering membrane tension, yet the principles governing their spatial organization remain elusive. Thus, we sought to generate the most comprehensive and systematic analysis of blood vessel caveolar spatial organization. However, cell culturing, the backbone of human-focused biological research, does not standardly do well to model physiologically relevant cell behaviors such as migration or polarity-based tissue formation, particularly for punctate proteins and structures like caveolae. Micropatterns are cell-adhesive shapes that biophysically confine cell(s) to a user defined geometry which stereotype organelle …

The Palm Farm Next-Door: Land Concessions, Livelihoods, And Nutrition In Plantation-Adjacent Communities, Julia Entwistle

Electronic Theses and Dissertations

Large-scale land concessions have reshaped agrarian landscapes globally, yet their implications for community land tenure, livelihoods, and nutrition remain unevenly understood. This dissertation examines how plantation agriculture and foreign investment have transformed land access, labor relations, and food systems in Liberia, a country with one of the highest proportions of land under concession globally. Guided by a political ecology framework, the study employs a mixed-methods design integrating policy analysis, in-depth interviews, and household surveys across two palm oil concession sites. The findings show that ambiguous land policies historically facilitated dispossession, while recent legal reforms have enabled communities to strategically mobilize …

Expanding Regenerative Agriculture Practices In East Texas, Treasure Hance

Electronic Theses and Dissertations

Regenerative agriculture has increasingly been referenced since 2015 for its ability to provide healthy food with less environmental and social impacts. Its basic premise/ideology is to follow a process whereby soil, biotic, and human communities are not just maintained but prepared to return to a better state. Soil health is a primary concern. Actions include no-till planting, composting to create more organic soil, less use of synthetic fertilizers and pesticides, along with better employment, animal care, and ecological outcomes/practices. Regenerative versions of other professions, such as regenerative medicine (e.g. gene/stem cell therapy) and regenerative architecture (design for surplus energy, restored …

Unc-45b As A Potential Chaperone For The Transcription Factor, Gata-4, Kaylah Owings

Electronic Theses and Dissertations

The cardiac myosin–specific chaperone UNC-45B has been shown to physically interact with the cardiac myosin transcription factor GATA-4. Specifically, this interaction occurs within the chaperoning region of UNC-45B, known as the UCS domain. However, the precise nature of this interaction has not yet been fully elucidated. The present study was conducted to confirm earlier findings and to evaluate whether UNC-45B functions as a chaperone for GATA-4 using bioinformatic approaches. Analysis of the interaction using AlphaFold 3 modeling verified not only that binding occurs at the UCS (chaperoning) domain of UNC-45B, but also that the interaction is associated with an increase …

Resource Allocation Trade-Offs Between Longevity And Reproduction In Daphnia Magna, Amelia Pearson

Electronic Theses and Dissertations

Although trade-offs between longevity and reproduction have been described for a long time, the genetic mechanisms by which organisms modulate allocation of resources between these two essential processes remain poorly understood, due to their complex nature and their modification by existing nutritional states and environmental cues. Daphnia magna represents a valuable model for investigation in this area due to their moderate lifespan and cyclic parthenogenetic mode of reproduction, allowing for the easy study of gene by environment interactions. This dissertation first investigates the change in mortality, reproduction, activity, and gene expression when fully fed Daphnia and calorically restricted Daphnia are …

Ontogeny And The Effects Of Perinatal Stress In The First Immature Skeleton Of Teleoceras Aepysoma (Perissodactyla, Rhinocerotidae), Joe Gajewski

Electronic Theses and Dissertations

Recovery of an immature fossil rhinoceros (Teleoceras aepysoma) skeleton (ETMNH 32999) from the Gray Fossil Site in Tennessee offers the first insights into the ontogeny of the species. ETMNH 32999 is interpreted to be a subadult male in an age class equivalent to ~17-20% of potential lifespan. Comparative analyses support the hypothesis that subadults of related taxa are typically ~91% of average adult size in most dimensions. However, certain cranial dimensions are substantially lower than expected in ETMNH 32999, averaging only ~74% of the average conspecific adult. Such departure from typical growth rates is suggested to be attributable …

Post-Exercise Vitals Recovery Response In Barrel Horses: A Field Study On Cooling Methods Used By Competitors, Lauran E. Hetrick

Electronic Theses and Dissertations

Barrel racing demands peak physical performance from equine athletes, yet limited research evaluates the field-based strategies used to optimize equine recovery at competition. This study assessed recovery management approaches used by competitors to elucidate their influence of physiological recovery by measuring heart rate, respiratory rate, and body temperature during a high-profile barrel race competition. Physiological data were collected at baseline, immediately post-exercise, and during a 15–30-minute cooldown period to characterize recovery under real-world conditions. Significant increases in HR, RR, and BT occurred from baseline to post-run (p < 0.001), followed by reductions during cooldown (p < 0.01), though values remained elevated (p < 0.05). Rinsing reduced HR and RR (p < 0.01), while shade and fans decreased RR and variably influenced HR. Noise, as a confounding variable, decreased HR but increased BT (p < 0.001). Ultimately, these results emphasize multimodal recovery approaches in competitive equine management in the field.

Propagation And Cultivation Of Sarracenia Species, Kathryn M. Huether

Electronic Theses and Dissertations

This study evaluates the effectiveness of seed treatments on Sarracenina species to overcome seed dormancy; as well as evaluating fertilizer concentration and substrate mixture impacts on the growth of Sarracenia × wrigleyana, ‘Scarlet Belle’. The first portion of this study evaluated the effects of cold stratification and chemical treatments (smoke water and gibberellic acid) on the germination rates of Sarracenia alata and leucophylla. The primary objective was to determine whether increasing concentrations of these treatments paired with or without stratification could significantly enhance germination and serve as viable seed treatments for horticultural use. Germination did occur within all the …

Body Size Variation And Floral Associations Of The American Bumble Bee, Bombus Pensylvanicus, In East Texas, Sabekun Nahar

Electronic Theses and Dissertations

The American bumble bee, Bombus pensylvanicus, is an important pollinator species that was once widespread in much of North America but has experienced population declines in recent decades in some regions. As a species of conservation concern, it is important to understand how body size varies in response to environmental conditions and to identify the key floral resources that support this species. I examined body size variation in East Texas and floral resource use of B. pensylvanicus across Texas. In the first chapter, body size variation among queens, workers, and males was quantified using thorax width and size variation …

Investigating The Synergistic Effects Of Mental And Physical Exhaustion On Learning And Attention In Emergency First Responders: An Eye-Tracking Study, Kayla Page

Electronic Theses and Dissertations

ABSTRACT

Exhaustion is known to impair cognitive functioning and performance, yet its effects on learning during video-based instruction among first responders and military service members remain underexplored. This study examined how mental, physical, and combined exhaustion independently influence learning outcomes and visual attention in a physically active sample drawn from military, public safety, and emergency service roles. Visual attention was measured utilizing eye tracking, focusing on fixation duration (FD) and fixation rate (FR). Participants completed instructional tasks under each exhaustion condition, allowing comparison of learning and gaze behavior across fatigue states. Results indicated that mental and physical exhaustion were associated …

Contribution Of G4 Structure To Alzheimer’S Disease And Tau Pathology, Lena Michaela Kallweit

Electronic Theses and Dissertations

The occurrence of Alzheimer’s Disease (AD) is rapidly increasing as our global population ages. With the majority of therapeutic drugs in the last couple of decades failing clinical trials, new molecular targets are needed to combat the expected influx of new AD cases. AD pathogenesis is associated with abnormal protein aggregation, characterized in part by intracellular accumulation of hyperphosphorylated tau (p-tau) in neurofibrillary tangles (NFTs). RNA has been identified as a major non-proteinaceous component of NFTs and has been implicated as an active cofactor in tau aggregation and spread. Recent work has shown that aggregates from AD brains contain almost …

Assessing The Impact Of Local–State Revenue Shares And Property Tax Structure On Effective Farmland Tax Rates: Panel Evidence From Seven Midwestern States, 2009–2022, Imtiaz Amin Chy

Electronic Theses and Dissertations

Property taxes are the primary revenue instrument of local governments in the United States, yet the burdens they impose are distributed unevenly. Farmland, because it cannot be relocated, often absorbs a disproportionate share. This paper examines two related questions: what fiscal factors determine how heavily agricultural land is taxed, and do those tax rates capitalize into farmland asset values? Using an annual panel of Iowa, Illinois, Indiana, Kansas, Minnesota, Nebraska, and Wisconsin from 2009 to 2022, we first document how each state allocates property tax revenue across four major spending categories (education, public welfare, health, and utilities) finding that all …

Regenerative Farming Practices Effects On Invertebrates In Wheat Systems, Daniel J. Pecenka

Electronic Theses and Dissertations

The modern agricultural system is based upon the Green Revolutions principle of creating more food. However, this came at a cost of invertebrate declines through habitat loss, pollution, and the introduction of agrochemicals. Here I address knowledge gaps in biological inventory of invertebrates across north, northwestern, and central North America. These invertebrates were identified and given a size scale and a dietary guild. We also examined how regenerative and conventional agricultural practices can affect invertebrate populations within the same crop. We also examined whether regenerative management wheat fields fostered great invertebrate communities while limited pest presence. Invertebrate populations were negatively …

Floodwater Salinity And Flood Duration Regulate Greenhouse Gas Production In High- Latitude Coastal Wetland And Tundra Soils, Mia J. Dicianna

Electronic Theses and Dissertations

Coastal high-latitude ecosystems are increasingly flooded from storm surges associated with climate change, exposing soils that were historically infrequently inundated to higher-salinity waters for longer durations. Sub-Arctic wetlands and tundra store large amounts of carbon, yet how flooding characteristics, particularly flood duration, influence microbial mineralization and, consequently, greenhouse gas (GHG) production in these soils remains poorly understood. We conducted a full-factorial microcosm incubation experiment in which coastal wetland and tundra soils were subjected to simulated flooding with three durations (1, 3, and 10 days) and four salinity treatments (unflooded, freshwater, 3 ppt, and 12 ppt) and measured carbon dioxide (CO2) …

An Integrated Evaluation Of Trace Mineral Status, Regional Variation, And Supplementation Effects On Circulating Mineral And Reproductive Performance In American Plains Bison, Bailey M. Rodriguez

Electronic Theses and Dissertations

The continued expansion of the American Plains Bison (Bison bison) industry has increased the need for science-based nutritional recommendations tailored specifically to the species, due to limited species-specific research. Because trace minerals influence immune function, growth, and reproductive performance, establishing baseline mineral status and evaluating responses to supplementation are critical for advancing bison production and conservation efforts. This thesis integrates two complementary investigations to evaluate trace mineral status in American Plains bison at both regional and herd management levels. First, a herd level comparison evaluated the influence of differing mineral supplementation strategies on circulating mineral concentrations, herd performance, and reproductive …

Winter-Feeding High Forage Vs. High Concentrate Diets To Beef Cows: Effects On Placental Transcriptomics, Lactation Capacity, And Enteric Methane Emissions, Megan Ann Wehrbein

Electronic Theses and Dissertations

Nutritional management and lactation performance are critical factors influencing productivity in cattle. This research includes two complementary studies. The first study was a meta-analysis to develop a lactation curve for Bos taurus cattle in North America using data from machine or hand milked cows. Data from 7 studies were used resulting in 1340 cow-day observations. Milk yield was analyzed by parity (primiparous or multiparous) and feeding management (non-nutrient restricted or nutrient restricted), revealing that primiparous cattle peaked earlier and at lower yields than multiparous cattle, and nutrient restriction reduced peak milk yield. Overall, Bos taurus cattle followed lactation trends similar …

Impacts Of Management Practices And Soil Properties On Free-Living Nitrogen Fixation In Eastern South Dakota, Laura Galvan Nuevo

Electronic Theses and Dissertations

Free-living nitrogen (N) fixation (FLNF) may represent a sustainable pathway to supplement crop N demand in agroecosystems, yet edaphic and management factors regulating this process under field conditions remain poorly understood in the Northern Great Plains. Using 15N2 direct method to quantify potential FLNF (pFLNF) and baseline FLNF (bFLNF), this thesis investigates how crop rotations (2-, 3-, and 4-year systems), tillage management (conventional vs. no-till), cover cropping, and soil properties affect the potential of free-living diazotrophs to supply N via FLNF in a long-term no-till corn-based system in Southeastern South Dakota. A two-year field study evaluated pFLNF across four growing …