Digital Commons Network^™

Sweet Potato In The Lower Rio Grande Valley: Evaluating Performance Across Several Cultivars, Jon Dale

Theses and Dissertations

In Texas’ subtropical, semiarid Lower Rio Grande Valley (LRGV), citrus and sugarcane cultures have dominated specialty crop production for more than a half-century. However, the future of these high-dollar crops is becoming uncertain with increases in exotic pathogens, intensifying urbanization and the overarching complexities of both climate change and binational governance of Rio Grande Basin waters. For these reasons, the region’s specialty crop sector needs to be ready for alternatives that could benefit both market outlets and reduced input dependencies. Sweet potato (Ipomoea batatas), commercially grown in various similar climates worldwide with limited water resources, could be one …

Long-Term Spatial And Temporal Assessment Of Criteria Air Pollutants Concentration Trends In The Lower Rio Grande Valley Region Of Texas, Usa, Md Salahuddin Majumder

Theses and Dissertations

Air pollution is a substantial environmental challenge all over the world. This study investigated the long-term air pollution levels in the Lower Rio Grande Valley region, by utilizing data collected from five continuous ambient monitoring stations in two counties over 23 years, from January 2000 to December 2022, to analyze daily, monthly, and seasonal variations of different pollutants, including ground-level ozone, particulate matter, and carbon monoxide. This study also identified distinct daily and seasonal patterns for O3, PM2.5, PM10, and CO at each monitoring site, influenced by factors such as traffic emissions, temperature, solar radiation, indoor heating, and weather conditions. …

Geospatial Analysis Based On Hurricane Storm Surge Scenarios On Coastal South Texas And North Mexico, Layda Belia Spor Leal

Theses and Dissertations

The coastal area of the Lower Rio Grande Valley, Texas, and Northern Tamaulipas, Mexico, has historically faced a variety of natural disasters involving flooding hazards, such as hurricanes and tropical storms. These scenarios not only represent imminent danger for the population in the area but can lead to long term effects on the infrastructure located in the impact zone. As such, it is imperative to conduct analysis on not only the specific areas that will be affected, but the severity of flooding that can result after a catastrophic event. Modelling work that simulates the storm surge in case of various …

Exploring Environmental Sensitivity And Significant Life Experiences Of Selected African American And Hispanic American College Students: A Mixed Methods Study, Danielle Pastor

Theses and Dissertations

This study explored Significant Life Experiences (SLEs) and the development of Environmental Sensitivity (ES) in a sample of African American and Hispanic American College Students. In the field of Environmental Education, SLEs and ES have been researched for the past 40 years. Specific factors associated with the development of ES have been identified (e.g., Chawla, 1998; Peterson, 1981; Tanner, 1980), and ES was found to be a predictor of environmental action (e.g., Marcinkowski, 2005; McBeth et al., 2014). Despite its importance, few studies have explored the development of ES among individuals who are majoring or working in an environmental field, …

Understanding Groundwater Flow In A Saturated Buffer Zone ( Sbz ) Using Numerical Models: Case Study Of T 3 Site, Mclean County, Central Illinois, Nnaemeka Henry Nsude

Theses and Dissertations

Loss of nutrients, such as nitrogen and phosphorous, from agricultural lands in the Midwest affects farm productivity and environmental quality. Nutrient runoff from lands discharged into streams degrades the aquatic ecosystem through eutrophication and subsequent hypoxic conditions. The presence of nitrogen also threatens the potability of numerous aquifer bodies globally due to their high solubility in water. To tackle this problem, best management practices such as Saturated Buffer Zone (SBZ) are implemented to reduce nitrogen from nitrate-laden tile water from agricultural lands before being discharged into streams. Groundwater flow and interactions at SBZ are not well understood. To aid the …

Assessment Of Spatial And Temporal Variations In Chloride Concentration In An Agricultural Tile-Drained Area In Central Illinois, Okiemute Commander

Theses and Dissertations

Long-term increase in chloride (Cl-) concentration in surface water and groundwater from anthropogenic sources, including deicing salts, agriculture, septic effluents, and wastewater treatment plants is a growing cause for concern all over the world. In rural midwestern US with predominant agricultural land usage and less impervious surface cover, agriculture may serve as a potential source for Cl- in surface and groundwater systems. A saturated riparian buffer (SRB) installed adjacent to a central Illinois stream to reduce nutrient losses was used to identify populations of Cl-, substantiate agricultural influence, and identify spatial and temporal Cl- variations within the SRB. 2297 water …

Designing For Multigenerational Households In The United States, Dongniya Xiu

Theses and Dissertations

Aging has become a challenging issue worldwide as well as in the United States where the high cost of nursing homes and unfriendly insurance plans have exacerbated the situation. To address this issue, multigenerational living arrangements have gained attention to bring financial, social, and environmental benefits, and reduce social isolation and loneliness among older adults. Researchers employed qualitative research methods by gathering data from open-ended interviews and observations to explore interior design needs and concerns and to identify necessary adjustments to promote aging-friendly living environments for multigenerational households. A total of 8 participants from four multigenerational households were conducted in …

Sound, Stories, And Psychology: The Perceptions And Motivations Of Audiobook Consumption, Ellice K. Tan

Theses and Dissertations

The demand for audiobooks is higher than ever--and increasing each year, surpassing the growth rate of electronic books, print books, and the US economy overall. Audiobooks have long been used to aid adolescent and struggling readers; however, recent studies have revealed that the majority of audiences consume audiobooks for the purpose of entertainment and relaxation. Despite this, much of the research available on audiobooks still applies to audiobooks as they are used in education. The purpose of this study was to understand the attitudes, opinions, and beliefs of people who love listening to audiobooks. The study was conducted using Q …

Unsupervised Categorical Clustering On Labor Markets, Matthew James Steffen

Theses and Dissertations

During this "white collar recession,'' there is a flooded labor market of workers. For employers seeking to hire, there is a need to identify potential qualified candidates for each job. The current state of the art is LinkedIn Recruiting or elastic search on Resumes. The current state of the art lacks efficiency and scalability along with an intuitive ranking of candidates. We believe this can be fixed with multi-layer categorical clustering via modularity maximization. To test this, we gathered a dataset that is extensive and representative of the job market. Our data comes from PeopleDataLabs and LinkedIn and is sampled …

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

Theses and Dissertations

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

The Impact Of Speech Pause On The Perceived Effectiveness And Likability Of A Speaker's Communication, Rebecca Lyman

Theses and Dissertations

The purpose of this study was to examine how length and location of speech pausing affects a listeners' perception of likability and communication effectiveness. Furthermore, the end goal of this study is to understand how to better assess atypical speech pause for persons with aphasia (PWA). Speech samples were collected from two neurotypical speakers over the age of 75. The speech samples were the recorded responses of picture description tasks found in the Western Aphasia Battery (WAB) and the Boston Diagnostic Aphasia Examination (BDAE). These speech samples were then modified to include artificial pauses located both within sentence and between …

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

Theses and Dissertations

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

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

Theses and Dissertations

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

A Flood Of Information: Assessing The Effectiveness Of An Enhanced Flash Flood Warning Social Media Graphic, Christopher John Long

Theses and Dissertations

Flash flooding is the most frequent and damaging type of severe weather globally. In the United States, heat is the only weather-related cause of death more frequent than flooding. However, while the number of deaths associated with other types of severe weather has decreased since the 1950s, the number of flash flood-related deaths has remained steady. Therefore, there exists a need to improve flash flood warning communication.

In this project, it is hypothesized that improving the National Weather Service’s flash flood warning social media graphic by including areas that commonly flood may increase individuals’ perceived storm risk, their intended compliance …

Gluten Free Diet Ameliorates Si Enteropathy In Iga Deficient Mice, Ryan Albert William Ball

Theses and Dissertations

Secretory IgA is the most abundant antibody in the intestinal mucosal and functions as the first line of defense against pathogens and micro-organisms in the gut. Selective IgA deficiency is the most common form of antibody deficiency. Clinically, IgA deficient patients are largely asymptomatic, they are however at a higher risk of developing certain inflammatory conditions like Celiac disease; an SI-specific enteropathy triggered by exposure to dietary gluten. Interestingly, celiac patients are 10-15 times more likely to have an IgA deficiency. Recent studies have shown that IgA^-/- mice develop enteropathy specifically in the ileum. We confirmed this phenotype in …

Learning To Spell, Alana Ines Perez

Theses and Dissertations

This thesis explores homonymic variations of the word “spell,” sewing together the framework for the ways my poems think about bilingualism, magic, Caribbean poetics, migration between northern and southern terrain, the body and personal spirituality. This thesis also experiments with forms old and new, such as the sonnet, and what I am naming “little altar poems” and “fragmented episodes.” These three forms attempt to do the work of recuperating Caribbean narratives and epistemologies. The “estrella sonnet” sequence uses the premise of an abortion as a way to initiate a nuanced discussion around how white patriarchy defines choice, consequently disregarding the …

From Derby Tracks To Surf Shacks: Reflections Of California’S Changing Cultural Landscape Through Artistic Renditions Of Recreation 1930s-1960s, David Walls

Theses and Dissertations

The aim of this thesis is to analyze works of art originating in the state of California during the 20^th century to better understand how sports and recreation were used as a subject matter to reflect upon the state’s changing cultural landscape. This changing landscape encompasses a wide range of social, cultural, economic, and political topics, however, the topics of race, migration, and economic strife are the most consistently reflected in the artistic production of this time and must be emphasized. Scholarship of art created within this region and timeframe has neglected the impact of recreational subject matter and …

Centering The Teacher: How An Autonomy-Supportive Environment Impacts Arts Educators’ Sense Of Agency And The Collaborative Culture Of Their Education Networks, Kyle Andrew Anderson

Theses and Dissertations

In this action research study, I adapted statewide systems of support for visual and performing arts educators in an effort to promote a positive sense of professional identity and strengthen the collaborative culture of the support systems. Prior to this study, the educator network met monthly for professional learning sessions planned and facilitated by a leader in a non-teacher role. As an action researcher, I restructured the sessions to create an autonomy-supportive environment to foster educators’ leadership skills and promote authentic collaboration. Study participants had autonomy over the planning, aims, content, and facilitation of the networking sessions. A basic qualitative …

Exploring The Current Training Of Undergraduate Geology Students And Teaching Spatial Skills To Improve Student Outcomes, Ann Marie Klyce

Theses and Dissertations

Spatial skills, which represent the ability to mentally manipulate objects (Schneider & McGrew, 2012; Atit et al., 2020) have been shown to be correlated with entrance, persistence and success in STEM (Shea et al., 2001; Wai et al., 2009). Specifically, these skills have been shown to be necessary to geologists and geoscientists (Hegarty, 2014; Gagnier et al., 2016). While we recognize the importance of these skills, explicit training in them is rarely offered (NRC 2006). Consequently, cognitive scientists and discipline based education researchers have begun concerted efforts to offer training in spatial skills to improve student outcomes (e.g. Uttal et …

The Widened Hearthstone Urban Playgrounds As The Infrastructure Of Public Mothering, 1900-1930, Alexandra Miller

Theses and Dissertations

Despite the limitations on their formal political involvement, women across the United States took control of the Progressive Era playground movement, and playground advocates nationwide argued that urban play spaces constructed motherhood into the city. While many mothers used playgrounds for child care, playground directors used the maternal authority constructed into playgrounds to promote their ideas about ideal citizenship. One playground director, Mabel E. Macomber, called this aspect of playground work the “'mother' element,” believing, as did other workers and advocates, that playgrounds were part of the apparatus of urban mothering, and in the case of many poor working women, …

Projecting The Effects Of Climate Change And Urbanization On Longleaf Pine Stands In The Florida Flatwoods, Lilian Grace Hutchens

Theses and Dissertations

The southeastern United States once held millions of hectares of highly connected longleaf pine ecosystem. In a dramatic range reduction, longleaf pine now occupies less than 5% of its original extent, its remnant patches existing within a matrix of human-dominated land uses. Conservation planning for longleaf pine ecosystems is complicated given the ecosystem’s reliance on fire and the broad spatial and temporal scales at which longleaf pine management must operate. Planning timelines for longleaf pine management extend into the end of the 21st century, a period during which climate, fire regimes, and land cover are all expected to change, influencing …

Rhetorical New Materialism, Queers, And Cringe, Katherine Anne Schell

Theses and Dissertations

Cringe, the negative reflexive reaction we experience when we witness something embarrassing or awkward, has a bad reputation in the queer community. In online and physical queer spaces, there is a pervading belief that “cringe culture” must be antithetical to queerness, that no queer community could possibly achieve liberation until it has eradicated the threat of cringe. This thesis revises that cringe vs. queer positioning by reimagining cringe as its own rhythm of queerness and examining the productive aspects of cringe through engagement with thinkers like Karen Barad and Eve Kosofsky Sedgwick. The thesis, formatted as a response to a …

Dust Production And Transport In A Long-Lived Fluvial-Eolian System In The Pampas Of South America, Blake Marcus Stubbins

Theses and Dissertations

Wind-blown dust from southern South America links the terrestrial, marine, atmospheric, and biologic components of Earth’s climate system. The Pampas of central Argentina (~33-40° S) contain an extensive upper Miocene to Holocene eolian record that spans the relatively warm conditions of the Late Miocene to cooler climates of the Plio-Pleistocene and Holocene. We collected 13 loess, paleosol, and fluvial samples from the upper Miocene Cerro Azul and Rio Negro Formations which resulted in n = 5129 new detrital zircon U-Pb ages. Late Miocene rivers conveyed sediment from northern Patagonia, the Andes adjacent to the Pampas, and the Sierras Pampeanas to …

Language Ideologies In Transgender Communities In The U.S. South, Archie Crowley

Theses and Dissertations

This dissertation examines how metalinguistic discussions within transgender communities in South Carolina are shaped by experiences, identities, and ideologies related to intersecting social dimensions, specifically, gender, age, race, and regional identity. Based primarily on 20 ethnographic group and individual interviews with 41 transgender individuals living in South Carolina, as well as over 24 months of participant-observation in two trans organizations, the analysis illustrates how trans South Carolinians simultaneously navigated changing norms of community language use, expectations of regional linguistic practices, and mainstream discussions of trans linguistic affirmation. I draw on these sociolinguistic and linguistic anthropological methods to examine how discourses …

The Theory Of Intonation: Boris Asafiev And The Russian Piano School Tradition, Polina Golubkova

Theses and Dissertations

Boris Asafiev was one of the leading musicologists whose Theory of Intonation is a philosophical and aesthetic study that comprehensively explains the historical and theoretical aspects of musical art. The Theory of Intonation is the methodological basis for music disciplines in Russia, including piano pedagogy. The purpose of this study is to create a source that explains Asafiev’s philosophical and aesthetic vision of the concept of intonation and to show how it can be applied to piano pedagogy. This study is also intended to translate and codify the Theory of Intonation and to provide examples of its implementation in any …

Parent Perspectives On Barriers And Facilitators To Optimal Healthcare And Medical Screenings For Children With Down Syndrome In South Carolina, Vinita Oberoi Leedom

Theses and Dissertations

Children with Down syndrome (DS) often have co-occurring conditions affecting vision, hearing, sleeping, and more. Screenings, as recommended by the American Academy of Pediatrics (AAP), can help prevent secondary disability, and allow children to thrive. Studies have evaluated the receipt of recommended screenings, but barriers and facilitators surrounding access to screenings and care have not been described.

Parents of 24 children with DS in SC were recruited through schools and family support groups. One-hour long interviews were conducted in English and Spanish. Information was collected on health, healthcare quality, respiratory concerns, pandemic effects, access to care, and knowledge about AAP …

Cashing The Check Of Democracy The American Revolution And Citizenship In The Black Freedom Struggle 1960-1970, Zachary Earle Clary

Theses and Dissertations

Separated into three interconnected parts, this thesis first proposes a reconfiguration of the vocabulary that historians use when classifying the memory and legacy of the American Revolution in the twentieth century. From there, I offer a comparative analysis of the Black Freedom Struggle’s relationship to the Declaration of Independence and other components of the American Revolution to demonstrate that the Revolution, while useful as a rhetorical tool or a conceptual model, functioned primarily as a counterpoint to the twentieth-century quest for Black citizenship. In other words, the American Revolution was a formidable example of radical protest in the American past, …

Sources Of Atmospheric Dust Deposition On Utah Lake, Justin Telfer

Theses and Dissertations

Atmospheric deposition (AD) is a significant source of nutrient loading to waterbodies around the world. However, the sources and loading rates are poorly understood for major waterbodies and even less understood for local waterbodies. Utah Lake is a eutrophic lake located in central Utah, USA, and has high nutrient levels. Recent research has identified AD as significant sources for nutrient loading to the lake to better understand the dust AD sources, we sampled suspected source locations and collected deposition samples around the lake. We analyzed these samples using Inductively Coupled Plasma (ICP) for 25 metals to characterize their elemental fingerprints. …

Multi-Year Analysis Of Groundwater Temperature Fluctuations In A Shallow Aquifer Sysytem Influenced By A Tile-Drain, Jack Thomas Wassik

Theses and Dissertations

Groundwater temperature plays a significant role in regulating geochemical, biological and physical processes with the subsurface with wide ranging environmental and societal impacts. Air temperature, weather conditions and lithology exhibit control on magnitude and timing of thermal responses that ultimately control groundwater temperature. Historical groundwater, tile water, stream and air temperature data from the T3 site were analyzed, including groundwater temperature data from multiple depths was analyzed. Additionally, statistical analyses between the temperature datasets were performed in order to interpret potential relationships. Air temperature was found to be the primary control of groundwater temperatures, though its affect being muted as …

Topological Variability In Water Distribution Networks, James M. Anderson

Theses and Dissertations

Water distribution networks are critical infrastructure characterized by difficulties in their assessment and deteriorating performance due to aging components. Resilience analysis of networked infrastructure has replaced traditional risk analysis to focus on performance. Global Resilience Analysis can provide useful information to decision makers and system managers regarding repair and expansion of networks. Network performance has been found to be directly informed by network structure. This work leverages graph theory to assess network qualities that correlate with resiliency characteristics across 69 real world water networks. These networks are then grouped by their structural properties through k-means clustering and compared using parametric …