Digital Commons Network^™

Parent Perception Of Preschool Programs: Improving Parent Knowledge Of Preschool Programs Through Targeted Recruitment, Meredith Lynn Drake

All Dissertations

Parent knowledge of preschool enrollment processes and the benefit of early education has been an issue at Mountain Elementary. Early childhood learning opportunities are a predictor of later academic success, and it is important that parents know about the available opportunities for early learning in public schools.

The purpose of this intervention is to create a targeted parent outreach program to recruit students to the four-year-old kindergarten programs at Mountain Elementary. This study attempts to answer whether targeted outreach increases enrollment numbers at Mountain Elementary.

After conducting two parent outreach events and creating two video-based social media posts, I analyzed …

Advancing Multi-Physics Modeling For Microwave Heating: Application In Micro-Reactor Design And Optimization, Raghav Adhikari

All Theses

Microreactors are a type of small-scale chemical reactors for achieving reduced volume, improved product selectivity and higher reaction rate. It allows precise temperature control, which is crucial for sensitive chemical processes. Microreactors can be employed as key components of conducting small-scale reactions with improved reactor configuration and process efficiency. It is important to identify a localized and precise heating mechanism to trigger and control the corresponding chemical reactions.

In fact, microwave heating has gathered significant attention in recent years due to its ability to deliver efficient, rapid, and localized heating, which can accelerate reaction rates and enhances the reaction selectivity. …

Ecological And Social Resilience In Wildfire-Prone Communities, Melissa Burnett

All Theses

Climate projections suggest extreme weather variability, introducing extremely wet years, followed by years with extreme drought. These weather conditions are creating fire weather conducive to increasing wildfires across the southeast over the next century, which can have extreme ecological consequences. The Appalachian Mountains historically had some of the highest fire frequencies in North America but have been subjected to decades of fire suppression and prevention policies, resulting in an environment subject to more high-severity wildfires. The fall of 2016 was one of the driest seasons on record in this region and resulted in intense and destructive fires in the southeastern …

Polyphenols For The Mitigation Of Vascular Calcification; In Vitro And In Vivo Studies, Abdullah Altuhami

All Theses

Globally, cardiovascular diseases, in most cases associated with calcification, are the main cause of death. However, currently, the only effective cure is to undergo surgery to augment or receive a healthy donor heart, which could be very difficult due to the long waiting list and the associated risks. The possibility of body rejection of the foreign organs is attributed to immunoreaction or the risk of infection, since the donor must be on immunosuppressant drugs that lower the body's immunity and facilitate the body's acceptance of the new organ as one of its own. Taking that into consideration, using tissue-engineered vascular …

Effect Of Cigarette Smoke Extract And Nutrient Deficiency On Energy Metabolism And Biosynthesis: An In Vitro Intervertebral Disc Explant Culture Study, Avery E. Madden

All Theses

Low back pain consistently ranks among the leading causes of disability worldwide, with degenerative changes in spinal intervertebral discs (IVDs) recognized as a key contributor. Degeneration arises from the disruption of mechanical and biological cues within the disc’s cartilaginous tissue, often exacerbated by aging or injury. In recent decades, cigarette smoking has also been identified as a significant risk factor, as IVD degeneration is more prevalent among individuals with a history of smoking. Smoke inhalation is thought to promote degeneration both directly, by exposing cells to water-soluble toxic chemicals in smoke; and indirectly, through nutrient deficiency resulting from vasoconstriction and …

Effect Of Amino Acid Derivatives And Polyphenol Supplementation On Skeletal Muscle Growth In-Vitro And In-Vivo, Gabriella C. Iheanacho

All Theses

Background

Satellite cells (SCs) are myogenic precursor cells that play a crucial role in muscle growth, and their activity can be influenced by nutrient supplementation. Muscle growth can also be stimulated using growth-promoting hormones; however, there are no approved growth hormones for use in sheep in the United States (Qaid & Abdoun, 2022). This limitation highlights a need to identify alternative compounds that would serve as nutrient supplements to enhance muscle growth and thereby improve meat production. Amino acid derivatives such as guanidinoacetic acid (GAA) and 5-hydroxytryptophan (5-HTP), along with the polyphenol quercetin, are naturally derived compounds that have shown …

Life Cycle Assessment Of The Cultivation Of Lettuce In A Hydroponic System Using The Nutrient Film Technique, Raquel Jordan

All Theses

Hydroponic systems are an emerging method of soilless crop cultivation typically done inside a greenhouse where nutrients are delivered dissolved in water rather than being supplied from the soil. Potential benefits of hydroponic systems include reduced irrigation requirements, higher crop yield per area, and the ability to grow crops year-round in nontraditional areas such as urban settings, cold climates, and sites with contaminated soil. However, hydroponic systems tend to have high energy requirements for lighting and climate control, which can yield significant environmental impacts. To explore the environmental impacts of cultivating lettuce in a nutrient film technique (NFT) hydroponic system, …

Effectiveness Of Electrosynthesized Hydrogen Peroxide In Urease Inactivation For Stabilization Of Source-Separated Urine To Recover Urea, Brooke E. Covert

All Theses

The practice of separating urine at a building scale, rather than mixing with domestic wastewater to be treated at water resource recovery facilities, allows for concentrated urine to be directly treated with the aim of resource recovery. However, source separation and treatment present challenges during separation, storage, and transport. This study evaluated the use of hydrogen peroxide-producing electrochemical cells, which represent a technology that uses electricity as an input, to stabilize urine through cathodically produced peroxide to enable downstream water and nutrient recovery. The electrochemical cells have been previously shown to stabilize urine with electrochemically produced peroxide as an effective …

An Empirical Analysis Of The Pitch Clock On Major League Baseball, David Langton Jr

All Theses

The pitch clock was instituted in baseball to speed up the pace of play and make the game more watchable. While it has achieved this effect, it may have affected other areas of the sport, like the balance between offense and defense and pitching injuries. This analysis explores the results of a difference-in-difference regression comparing MLB and AAA 2015-2024 seasons. Overall, it finds that pitching statistics were not significantly affected, including elbow injuries. This includes games, ERA, and times a batter is hit by a pitch. In fact, the number of home runs and walks both went down significantly by …

Expandable Tissue Engineered Living Pulmonary Heart Valve For Pediatric Patients, David Podolsky

All Theses

Cardiovascular disease is an extremely deadly disease that affects people throughout the world. It is the leading cause of death worldwide, affecting over a quarter of the population.1 Some forms of cardiovascular disease directly affect the heart valves and their function. Surgery or a replacement device are the most common current treatment options. These treatments are effective in addressing heart valve diseases in adults, but they are less effective when used for children patients. This creates a need to develop a solution for the child population.

Congenital heart defects are structural abnormalities that often lead to infant mortality.2,3 Pulmonary valves, …

The Uses Of Dramaturgical Research In Cinematic Storytelling, Asset Design, And Adaptation In Animation, Delaney L. Walker

All Theses

“The Black Hair” is a creative project that explores the convergence of cinematic adaptation, dramaturgical research, and animation design in retelling a traditional Japanese short folktale from the Heian Era. Rooted in the practice of theatrical dramaturgy, this thesis advocates for a research-driven creative pipeline by developing a culturally respectful and historically grounded approach to developing cinematic storyboards. By thoroughly examining the chronicles of history and the sociocultural context, the project seeks to foster deeper cultural appreciation while reintroducing a lesser-known narrative to modern audiences through a visual medium. The project draws stylistic and narrative inspiration from iconic Japanese filmmakers …

Exploring Promising Practices In Temporary Informal Education Programs For Visitor And Community Engagement In The United States National Park Service, Cameron L. Miller

All Theses

According to the National Association for Interpretation (NAI), interpretation is “a purposeful approach to communication that facilitates meaningful, relevant, and inclusive experiences that deepen understanding, broaden perspectives, and inspire engagement with the world around us” (NAI, 2021). Interpretation is an integral part of a visitor’s experience to informal education venues like museums, zoos, aquariums, and parks and is at the heart of experience planning within the National Park Service (NPS). However, traditional interpretation methods, such as formal interpretation programs, tend to engage a small percentage of overall park visitors, that are typically older and white. Recognizing the need for interpretation …

Evaluating The Impact Of Activated Carbon On The Biodegradation Of Btex Compounds, Megan Barkley

All Theses

BTEX compounds—benzene, toluene, ethylbenzene and xylenes—are toxic, volatile, aromatic hydrocarbons. They are primarily found in petroleum products and can easily enter the environment. Typical remediation techniques include sorption to activated carbon, pump and treat, and bioremediation. Research suggests that combining sorption to activated carbon and bioremediation may enhance BTEX removal. This study evaluates the impact of granular activated carbon (GAC) on the biodegradation of ethylbenzene and toluene, using an enrichment culture of aerobic bacteria.

The main objectives of this study are to grow and maintain a culture that degrades BTEX compounds, evaluate the effect of activated carbon on the biodegradation …

3,5-Dihydroxy-4-Isopropylstilbene (Tapinarof) Is A Partial Aryl Hydrocarbon Receptor Agonist In Fish, Conner A. Dicks

All Theses

The aryl hydrocarbon receptor (AHR) is a ligand activated transcription factor that is essential in regulating development, immune homeostasis, and drug and xenobiotic metabolism. Activation of the AHR by specific ligands results in its translocation to the nucleus where it induces a myriad of gene products, including cytochrome P450 (CYP) drug metabolizing enzymes (e.g., CYP1A1) and other components of the chemical defensome, as well as inflammatory control. Interestingly, the AHR can bind a wide variety of endogenous and xenobiotic ligands which are able to induce unique downstream effects dependent on cell type, inflammatory context, and ligand stability. The AHR is …

Developing Guidance For The Use Of Floating Treatment Wetlands In Brackish Stormwater Ponds, Clare Escamilla

All Dissertations

Stormwater ponds are commonly used as a flood control strategy, particularly in coastal developments. Many coastal stormwater ponds are impaired with high nutrient levels that can lead to algal blooms, impacting the water quality of the pond and surrounding ecosystem. Floating treatment wetlands (FTWs) are one potential strategy that can be implemented in stormwater ponds to reduce high nutrient concentrations, however limited research has been done in brackish waterbodies. To determine the suitability of using FTWs in brackish stormwater ponds this research focused on (1) coastal resident perceptions of FTWs and (2) plants that can be utilized in FTWs deployed …

Robustness Investigation, Detection, And Defense Of Deep Learning Models Against False Data Injection, Amirhossein Nazeri

All Dissertations

This dissertation addresses the critical challenge of adversarial robustness in deep learning systems, focusing on two fundamental domains: time-series prediction and object detection. As these AI systems become increasingly deployed in safety-critical applications from power grid management to autonomous vehicles their vulnerability to adversarial attacks poses significant risks to infrastructure and human safety.

The first contribution introduces a novel stealthy black-box False Data Injection (FDI) attack specifically designed for quasi-periodic time-series data. Unlike existing attacks that produce easily detectable anomalies, our method generates adversarial perturbations that preserve the underlying periodicity and statistical properties of the data, effectively bypassing traditional anomaly …

Elucidating The Mechanisms Underlying A Functional Plant-Arbuscular Mycorrhizal Symbiosis Using Omics Approaches, Jasmine Gill

All Dissertations

Arbuscular mycorrhizal fungi (AMF) are obligate biotrophs forming symbiotic association with plants. The plant-AMF symbiosis has gained much attention due to its ability to improve plant nutrient uptake, especially phosphorus, which is often inadequately available to plants due to its limited mobility and complex formation in many soils. Phosphorus (P) is a crucial nutrient for plants, and most phosphate fertilizers are derived from phosphate rock, a finite natural resource. Thus, optimizing P uptake is vital for sustaining crop yields and addressing the needs of a growing global population. Plant-AMF symbioses are significant in this context, as AMF can acquire P …

Signals Of Trust: How Privacy Disclosures And Public Responses Drive User Behavior In Digital Markets, Jose Pius Nedumkallel

All Dissertations

This dissertation examines how data privacy practices and complaint response strategies influence user behavior and market outcomes in digital marketplaces. The first study analyzes the impact of Google Play’s Data Safety Label, launched in April 2022 to standardize data collection, third-party sharing, and security disclosures. Grounded in signaling and prospect theories, the label is treated as a compound signal users interpret holistically. A difference-in-differences analysis of 23,877 top Android apps over two years shows that disclosures increase user app adoption. Internal data collection boosts adoption, while third-party sharing reduces it, reflecting behavioral loss aversion. Security disclosures moderate these effects by …

Three Essays On Mental Health Courts, Taylor E. Le Moal

All Dissertations

Mental illness in the criminal justice system is a major issue, with 2 in 5 incarcerated people in the US having a serious mental illness (Criminalization of People with Mental Illness, n.d.). Prisons have turned into “de facto” mental health facilities when these facilities are not equipped to do so. This means once individuals are released from incarceration, they are often ill-equipped to return to regular life and may get caught up in the cycle of recidivism (Slate, 2017). One method that policymakers have used to solve this problem is mental health courts (MHCs), which are pre-trial diversion …

Impact Of Cysteine And Tyrosine Dipeptides On Cho Cell Performance In A Perfusion Mimic, Corrin L. Pruitt

All Theses

Perfusion cell cultures typically achieve higher cell densities and generate higher volumetric productivities than fed-batch cultures due to continuous nutrient supply and spent media removal. Despite these advantages, perfusion cell cultures remain underutilized for licensed product manufacturing, primarily due to the lack of small-scale perfusion models for high-throughput process development and the complexities involved in media formulation capable of supporting high cell densities during long-term continuous operation. To avoid nutrient limitation at high cell densities, current perfusion processes rely on using higher perfusion rates, which results in significant media wastage and downstream product dilution. Therefore, there has been an effort …

An Exploration Of Elderly Representation & Stereotypes In Animation, Tyler Kidd

All Theses

In the world of animated features, supporting cast members are often reduced down to simple character traits in order to give the audience a simple idea of their personality or role in the story, or to support the creation of a work that is easier to understand for people of all ages. However, this can often result in the application of negative tropes that do not reflect kindly on those being depicted. The elderly are a group that often get caught in these stereotypes, being depicted as wrinkly, clumsy, overweight villains. While you can still find many positive portrayals in …

The Effect Of Tort Liability For Prescribed Burns On Wildfire Severity: Evidence From Georgia’S 2000 Policy Reform, John Patrick Phillips

All Theses

This paper aims to estimate the effect of Georgia’s shift in its prescribed fire tort liability standard from simple negligence to gross negligence on the area burned by wildfires on privately owned land. In response to wildfire damage, some states in the Southeast relaxed their liability standards, aiming to promote more prescribed burns and to better control future wildfires. Using the variation of these policy changes, I construct difference-in-difference models to estimate the treatment effect of Georgia’s policy change in July 2000, using counties in North and South Carolina as the control group. I stagger my regressions, adding covariates and …

Impact Of Activated Carbon On In-Situ Reductive Dechlorination Of Chlorinated Ethenes In The Presence Of Perfluoroalykl Substances, Katie Motta

All Theses

Perfluoroalkyl substances (PFAS) and chlorinated ethenes are frequently co-detected at contaminated sites, yet little is know about how PFAS influence the performance of in-situ reductive dechlorination processes, particularly in systems amended with activated carbon.

The objective of this research was to study the impact of PFAS on in-situ reductive dechlorination of chlorinated ethenes using activated carbon. This research aims to characterize the sorption behavior of PCE and TCE (and its daughter products) and PFAS (PFOS and PFOA) onto activated carbon, and to assess how this sorption influences PCE and TCE removal from contaminated media in the presence of activated carbon. …

Did California's Mental Health Services Act Improve Mental Health? Evidence From Self-Reported Data, Bennett Rider

All Theses

This analysis evaluates the impact of California’s Mental Health Services Act (MHSA), which was implemented in 2006 to increase access and improve quality of mental health care for Californians. Difference-in-differences analyses were applied to evaluate the impact of the MHSA on the number of poor mental health days in the past month (PMHDs) that survey respondents had self-reported, relative to a control group with similar pre-policy trends. Using survey data from the Behavioral Risk Factor Surveillance System (BRFSS), this study found that the MHSA’s full implementation is associated with California respondents reporting 0.118 fewer poor mental health days in the …

Biological Hydrogen Process Improvements By High Temperature Simultaneous Saccharification And Fermentation, Frank W. Jeffries V

All Theses

The hyperthermophilic bacterium Thermotoga neapolitana is established as a versatile organism for fermentative hydrogen (H₂) production. Batch experiments were carried out to investigate the cell yield, product yield, and kinetic parameter values for individual media containing five carbohydrates. The highest H₂ yield of 15.56±0.31 mmol-H₂/g-carbohydrate was reported for glucose medium. H₂ yield was measured to be 14.51±0.38, 14.44±1.15, 11.88±0.84, and 11.53±0.73 mmol/g for media containing xylose, cellobiose, arabinose and xylan respectively. Acetic acid yield followed a similar trend, where the obtained values were 0.470±0.01, 0.462±0.04, 0.431±0.01, 0.409±0.03, and 0.406±0.01 g-acid/g-carbohydrate for glucose, cellobiose, xylose, …

Revolutionizing Digital Privacy Education For Older Adults: Enhanced Interventions And Ai-Assisted Learning Strategies, Heba Aly

All Dissertations

As older adults increasingly engage with digital platforms, they face unique privacy risks stemming from limited digital literacy, reduced trust in AI technologies, and constrained access—especially in rural or underserved communities. While digital tools offer benefits like social connection and information access, current privacy education efforts often neglect the needs of older adults. This dissertation addresses this gap by developing, testing, and refining digital privacy education interventions tailored for older adults, with a focus on trust, personalization, and AI-assisted learning.

Study 1 evaluates multiple instructional modalities across age groups, revealing older adults prefer structured videos and interactive tutorials, while younger …

A Study On The Propagation And Exploitation Of Structured Light In Underwater Turbulence, Jaxon P. Wiley

All Dissertations

The development and optimization of optical systems will play a pivotal role in the continued exploration and exploitation of the world’s underwater environments. These systems offer advantages in many sectors, and includes applications in areas such as high-speed communication, advanced sensing and imaging, and environmental characterization and monitoring. Underwater environments offer a plethora of challenges, however, and mitigating these obstacles remains an arduous task. In this work, the inherent advantages of structured light are leveraged to optimize optical system performance through non-ideal underwater conditions. Additionally, fundamental relationships between the generation of specified structured modes and their interactions with complex environments …

Strategic Implications Of Responses To Security And Privacy Challenges, Shivan Bhatt

All Dissertations

This dissertation investigates strategic implications of information security and privacy for organizations and society in the contexts of ransomware and mobile apps. The first study examines how organizations’ disclosures of responses to ransomware attacks affect ransomware strain survival. Ransomware attacks force organizations to make consequential decisions regarding disclosure—whether to reveal ransom payments, negotiation attempts, or coordination with external stakeholders. This study investigates how these disclosure choices influence the survival of ransomware strains. Drawing on disclosure theory and institutional theory, we theorize that disclosure behavior is shaped by dual logics and audiences: strategic signaling towards attackers and institutional conformity aimed at …

Designing Multilingual (Maker) Spaces: Exploring The Intersections Of Play, Posthumanism, And Pre-Kindergarten, Victoria G. Pennington

All Dissertations

In this dissertation, I explore the posthuman play literacies of multilingual makerspaces with four-year-olds, emphasizing the need for such a study while situating my arguments within the existing literature and outlining my methodological approach. Chapter One critiques the public 4-year-old kindergarten systems, arguing institutionalized cultural and linguistic ideologies restrict multilingual learners’ (MLs) opportunities for meaning-making. I draw on the raciolinguistic perspective (Flores & Rosa, 2015) and its intersection with a posthumanist paradigm (Braidotti, 2013), framing my research questions as lines of inquiry to guide the study. Key posthumanist literacies concepts are defined, highlighting the entanglement of literacies, discourses, materials, and …

Influence Of Experience And Risk With Natural Hazards On Geoscience Interest And Career Expectations, Shannon Conner

All Dissertations

Understanding student interest in geoscience is important, as it has the potential to inform departmental decisions such as the selection of classroom examples and marketing strategies to attract new geoscience majors. Recruitment to geoscience is critical to address future social and environmental challenges. Our work may also provide insight into how to approach persistent recruitment problems within departments, such as student enrollment and the lack of diversity within the geosciences. This work involves developing a geoscience interest scale, integrating geospatial and educational data sets related to hazard risk and interest, and an exploring career motivations as related to natural hazard …