Digital Commons Network^™

The Relationship Of Graduating Students (Alumni-To-Be)’S Sense Of Belonging And Their Intent To Give Back To Their Alma Mater At A Hispanic Serving Institution (Hsi) In South Texas, Lanlan Alvarado

Theses and Dissertations

Higher education institutions are increasingly relying on funding from the private sector (Council for Aid to Education, 2013) as state funding to higher education has decreased in recent years. Bridging the gap between university financial needs and available funding has become a high priority. In the process, higher education institutions have enlisted their advancement offices towards such bridging efforts by systematically bringing in financial support from donors, alumni, corporations, and foundations.

Funding from private sources fluctuates with changes in the macro-economic environment, laws, and regulations, as well as shifts in philanthropic interests in the public. Alumni giving constitutes a substantial …

Characterization Of Lower Rio Grande Valley Watershed, Abdulkabir O. Aduragba

Theses and Dissertations

The Lower Laguna Madre (LLM) is considered impaired because of the high concentration of bacteria and low level of dissolved oxygen (DO). LLM receives freshwater from the Lower Rio Grande Valley (LRGV) watershed. In other to understand the impairment, LRGV watershed is being studied by relying on water quality data of the contributing drainages and State resource geographic data to identify watershed boundary and pollutant sources.

The study on the North and Central LRGV watershed shows some correlation between the concentration of E. coli/Bacteria, Ammonia, Total Kjeldahl Nitrogen, Total Phosphorus, Nitrate and Nitrite, Chlorophyll-a and the sources of pollutant in …

Themes And Participants’ Role In Online Health Discussion: Evidence From Reddit, Massara Alazazi

Theses and Dissertations

Health-related topics are discussed widely on different social networking sites. These discussions and their related aspects can reveal significant insights and patterns that are worth studying and understanding. In this dissertation, we explore the patterns of mandatory and voluntary vaccine online discussions including the topics discussed, the words correlated with each of them, and the sentiment expressed. Moreover, we explore the role opinion leaders play in the health discussion and their impact on participation in a particular discussion. Opinion leaders are determined, and their impact on discussion participation is differentiated based on their different characteristics such as their connections and …

Faculty Perceptions Of Online Instruction And Educational Technology In Higher Education, Raul Nick Cabrera

Theses and Dissertations

The purpose of this research was to obtain faculty perceptions of online instruction and educational technology in higher education. Data was collected from eight participants through interviews and open-ended questions at a higher education institution. Results showed that faculty consider that online instruction is only possible for certain programs and that it’s only for certain student populations. In addition, faculty perceive online learning environments as a repository for class information and serve as a communication medium between instructor and student. Furthermore, faculty believe that there is no substitution for traditional teaching methods regardless of the educational technology available. Theoretical and …

Electrical Characterization Of Cementitious Composites, Abbas Ali

Theses and Dissertations

Multifunctional concrete using electrical conductivity gains attention for various nonstructural applications. Particularly, conductive concrete enables monitoring internal damages in concrete, which has been impossible by conventional nondestructive methods. On the other hand, most of on-going investigations on multifunctional concrete uses conductive additives to impart electrical conductivity into concrete, but this limits the multifunctional application to predesigned structures. Finding multifunctionality embedded in conventional concrete can open various possibilities for smart concrete. Aiming to finding the feasibility of using conventional concrete for multifunctional application, this study investigates the electrical properties of plain cementitious composites including cement paste, mortar, and concrete, but not …

An Investigative Study Of Potential Factors That Contribute To High Under-Five Mortality Rate In Africa, David Banahene

Theses and Dissertations

Under-Five Mortality remains a significant challenge in developing countries, especially in Africa. The United Nations has implemented various measures, such as the Millennium Development Goals (MDGs) and Sustainable Development Goals (SDGs), to combat this issue. However, the success of these initiatives is uncertain. Our study investigates the social, economic, and environmental factors contributing to high Under-Five Mortality rates in African countries, using data from 1985 to 2020.We analyzed 53 African countries, partitioning them into training (45 countries) and testing data (8 countries). We conducted Multiple Linear Regression analysis and assessed the model performance using R-squared values and Root-Mean-Squared-Error (RMSE) values. …

South Texas Elegy: Life During A Global Pandemic, Brianna Bullion

Theses and Dissertations

South Texas Elegy: Life During a Global Pandemic highlights the narrator’s experience with loss and grief during the coronavirus pandemic, which started in early 2020. This piece is written from the perspective of a narrator living in the Rio Grande Valley, which is in the southmost region of Texas.

This memoir contains thirteen chapters, which discuss deaths of close friends and family members, periods of waiting which occurred in between deaths and updates on the coronavirus, and the narrator’s reflection at the end of the piece. This memoir is a tribute to lost loved ones and an account of an …

Creation Of A College Math Club For High School Students, Lilian N. Chavez

Theses and Dissertations

This study aimed to investigate the variables that contribute to high school students' desire to join a math club, specifically the FMiM VIP Club, which is an extension of UTRGV's Follow Me into Math research project. The research utilized multiple questionnaire s to examine the combination of factors that contribute to the students' attitudes toward the math club. The participants were high school Algebra 2 students from two different schools, and the study was conducted in two stages. The first stage was conducted in the Spring of 2022, focusing on girls' math identity and their interactions with the FMiM VIP …

Teacher Perceptions Of Instructional Feedback, Rita Caltabiano-Carrillo

Theses and Dissertations

The instructional feedback cycle is an essential tool in the field of education. When implemented successfully, feedback has the potential to significantly affect student and teacher growth. However, instructional feedback frequently goes unimplemented or unvalued, which can potentially lead to a decrease in student performance or the instructional effectiveness of the teacher. The purpose of this quantitative research study is to examine teacher perceptions of feedback received from instructional coaches and to examine seasoned and unseasoned teachers’ implementation of feedback in their instructional practices. This study focuses on the teacher population at a public charter school district in Texas.

Parental Well-Being And Children’S Internalizing Symptoms During The Beginning Of The Covid-19 Pandemic In The United States, Diana Duran

Theses and Dissertations

During the beginning of the COVID-19 pandemic stay-at-home orders in the U.S., many parents of school-age children faced new challenges, such increased child-care demands (Adams, 2021). Prime et al. (2020) theorized these negative pandemic impacts would decrease parents' well-being and thereby impact children's psychological adjustment. This study hypothesized that higher number of negative pandemic impacts would predict worsened stress and relationship satisfaction levels among parents, and that this would in turn predict worsened child internalizing symptoms. 595 U.S. parents of school-age children were recruited online during May 2020. Higher number of negative pandemic impacts predicted worsened parents' stress and relationship …

Analysis Of Post-Translational Modifications (Ptm) Crosstalk, Amit Das

Theses and Dissertations

Mass spectrometry-based proteomics is a powerful tool for identifying post-translational modifications (PTMs) across the proteome. O-GlcNAcylation and phosphorylation are two PTMs that play crucial roles in regulating cellular processes, including cardiac contractile function. Dysregulation of these PTMs has been implicated in the development and progression of diabetic cardiomyopathy. In this study, we aimed to investigate the interplay between O-GlcNAcylation and phosphorylation in healthy and type 2 diabetic hearts, with a specific focus on the functional relationships between these PTMs and their potential therapeutic implications.

Utilizing mass spectrometry data, we identified and quantified specific PTMs on myofilament proteins, uncovering 1354 O-GlcNAcylated …

Effect Of Elevated Temperature And Roundup Exposure On Oxidative Stress And Antioxidant Status In The American Oyster, Afsana Chowdhury

Theses and Dissertations

Aquatic organisms are frequently exposed to various environmental stressors. In this study, we observed the short-term (1-week) combined dose-dependent effect of Roundup, a glyphosate-based herbicide, and high temperature (30°C) on the morphology of gills and digestive glands, expression of heat shock protein-70 (HSP70), dinitrophenyl protein (DNP), nitrotyrosine protein (NTP), antioxidant enzymes such as catalase (CAT) and superoxidase dismutase (SOD) in tissues of American oyster (Crassostrea virginica). Histological analyses showed an increase in mucous production in the gills and digestive glands, hemocyte aggregation in the connective tissues as well as structural change of the lumen in the digestive glands …

The Role Of The Similarity Between Suppliers' And Buyers' Sustainability Practices In Improving Suppliers' Performance: An Empirical Investigation, Kwanheui Cheon

Theses and Dissertations

Sustainability has become an essential component of corporate survival and prosperity. As a result, companies are eager to introduce sustainability to every part of their businesses. In addition, because stakeholders' interest has spread from companies to their entire supply chain, companies must manage their relationships with other supply chain members regarding sustainability. Consequently, there has been an interest in investigating the implementation and management of sustainability along supply chains. However, there are still voids in sustainable supply chain management research. For example, scholars have pointed out the need for research on sustainability from a supplier perspective as opposed to the …

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 …

Pronombres De La Tercera Persona Del Zapoteco De Macuiltianguis [Third Person Pronouns In Macuiltianguis Zapotec], Paula Margarita Foreman

Theses and Dissertations

As attested in Marlett (2010), the Zapotec languages of Oaxaca, Mexico, exhibit great variation within their pronominal systems. Based on my knowledge as a native speaker, I present a description of third-person pronouns in the Zapotec from the town of San Pablo Macuiltianguis (MacZ) (ISO 639-3 [zaa]) (Eberhard, Simons, & Fennig 2023), part of the Sierra de Juárez Juárez within the Sierra Norte branch of Zapotec (Smith Stark 2007). MacZ has four categories of third person pronouns (which can be called formal, general, child, and animal). The child and animal pronouns are generally optional, used to emphasize affection. The choice …

“Screen Riders” An Exploration Of Breaking Away From The Norms Of Cinematic Storytelling, Jake Alexander Escamilla

Theses and Dissertations

Throughout my time in college, I would always hear people discussing how originality is dead and that everything has been done before. Though I do believe there is some air of truth to these statements, I hold tight to the idea that originality is not truly gone. My belief is that the entertainment industry is so set on playing it safe, they do not wish to break away and explore new ideas which have never been done before. I believe that if more creatives were given the freedom to try new combinations and had more fun doing what they love, …

A Machine Learning Approach To Evaluate The Effect Of Sodium-Glucose Cotransporter-2 Inhibitors On Chronic Kidney Disease In Diabetes Patients, Solomon Eshun

Theses and Dissertations

Chronic kidney disease (CKD) is a significant complication that contributes to diabetes-related mortality in the United States, and there is growing evidence that sodium-glucose cotransporter 2 inhibitors (SGLT2i) can slow its progression. However, observational studies may suffer from confounding by indication, where patient characteristics and disease severity influence the decision to prescribe SGLT2i. This study utilized electronic health records of individuals with diabetes (from TriNetX) to investigate the effectiveness of SGLT2i on CKD progression. The database provided detailed information on patients’ CKD status, demographics, diagnosis, procedures, and medications, along with corresponding dates of diagnosis and prescription. The study comprised of …

Nepantla – Examining The Sacred Middle Ground Of Syncretism, Jose Luis Garcia Iii

Theses and Dissertations

As a result of historical traumas caused by the Spanish invasion of Mexico, the autonomy of its Indigenous peoples has been replaced by a Eurocentric identifier based on a colonial language and theologies. Because of the vastness surrounding the Nahua pantheon, Spanish and Church officials relied on guided syncretism as means of correcting their methodologies in converting Mexico’s Indigenous population. This thesis examines syncretism as a process of religious mixing and its residual cultural changes that affected Mexico’s Indigenous populations. This ethnographic research argues that syncretism as an overarching, universalized term is insufficient to describe this process in the Chalma …

Essays On Behavioral Decision Making In Crowdfunding Environments, Bright Frimpong

Theses and Dissertations

Crowdfunding has revolutionized the world of financing. From entrepreneurs to financially excluded individuals seeking funding for essential projects, crowdfunding provides an expansive platform for project founders to raise needed capital for pending or ongoing projects. In addition to raising capital, founders also use crowdfunding to test market an idea, gain exposure for future funding, gain validation, and build trusting relationships with backers (Zhou et al., 2018). However, the success of crowdfunding is dependent on crowd participation- backer support and funding. The importance of crowd participation in crowdfunding is not limited to project funding, but also building public involvement and support …

Evaluating Readiness To Teach Online By Examining The Relationship Between Faculty’S Perceptions Of Importance Of Course Design, Course Communication, Time Management, And Technical Competency, And Their Readiness To Teach Online, Francisco Garcia

Theses and Dissertations

The purpose of this study was to examine faculty’s perceptions of the importance of online teaching competencies and their perceptions of their ability to teach online. Two aspects of readiness are focused on in this framework: 1) faculty attitude on importance of online teaching competencies and 2) faculty perception on their ability to confidently teach online, and four competencies were utilized in this study: Course Design, Course Communication, Time Management, and Technical Competency. A quantitative research design was utilized to analyze data and show the degree of correlation between importance and ability in the four competencies. MANOVA was used to …

Irreverent Womanhood: The Healing Of Intergenerational And Cultural Trauma In The Chicanx And Latinx Sonic Poetry Of Amalia Ortiz And Melissa Lozada-Oliva, Yasmine A. Gomez

Theses and Dissertations

The connections between nontraditional forms of literature and spiritual activism lie within the resistive practices of Chicanx Feminism. This thesis argues that cultural healing and social change is dependent upon the recognition of trauma as a step towards enacting social justice. Additionally, this thesis focuses on the figure of Coyolxauhqui and indigenous motherhood to reveal procedures for change. Through the theory of trauma, this thesis examines the nontraditional Chicanx/Latinx poetry of Amalia Ortiz’s sonic rock opera, Cancíon, Cannibal, Cabaret, & Other Songs and Melissa Lozada-Oliva’s novel in verse, Dreaming of You.

My investigation into the breaking of gendered …

Quality Of Life Among Caregivers Of Individuals With 22q11.2 Deletion Syndrome And Intellectual Disability, Sandra Garza Ochoa

Theses and Dissertations

Caregiving for a person with 22q11.2 chromosome deletion syndrome (22q) often entails dealing with medically life-threatening complications and is significantly compounded when the care recipient has comorbid 22q and intellectual disability (ID). The purpose of this study was to examine the effect of support, spirituality, and resiliency on the quality of life (QOL) of caregivers of individuals with comorbid 22q/ID to ascertain if these protective factors would reduce their caregiving burden. Study participants consisted of 469 caregivers of persons with 22q/ID who were recruited through 22q social advocacy groups. Correlational analyses, analyses of variance, and multiple regression analysis were used …

Formation Control Of Multiple Quadrotors, Miguel Alejandro Garcia

Theses and Dissertations

This thesis studies formation control of multiple quadrotors under different conditions. Two controller design approaches are proposed. In the first approach, it is assumed that the dynamics of each quadrotor is unknown and there is disturbance. With the aid of distributed estimation and the universal approximation property of neural networks, distributed tracking controllers are proposed. Simulation shows the effectiveness of the proposed controllers. In the second approach, it is assumed that the inertia parameters are unknown. With the aid of distributed estimation, online data estimation, and optimal control theory, distributed sub-optimal tracking controllers are proposed. Simulation results show the effectiveness …

Graphene-Conductive Ink Coated Laser Engraved Kapton Electrochemical Biosensor For The Detection Of Dopamine And Immune Sensing, Dipannita Ghosh

Theses and Dissertations

Novel and flexible disposable laser-engraved Kapton (LEK) electrodes modified with graphene conductive inks have been developed for dopamine and Interleukin-6 (IL-6) detection. The LEK sensors exhibit high reproducibility (RSD=0.76%, N=5) and stability (RSD=4.39%, N=15)after multiple bendings, and thus make the sensors ideal for wearable and stretchable bioelectronics applications. We have developed graphene conductive ink- PEDOT:PSS (G-PEDOT:PSS) and polyaniline (G-PANI) based electrode coatings for working electrode modification to improve the sensitivity (41.41 times higher for screen printed electrode with G-PEDPT:PSS ink modification),and limit of detection (LOD) . We have further compared the performance of the fabricated electrodes with commercially available screen-printed …

Self-Supervised Representation Learning For Motion Time Series: A Case Study In Activity Recognition, Luis Carlos Garza Perez

Theses and Dissertations

In this thesis we will learn about what contrastive learning and time series are and understand the differences between supervised and self-supervised frameworks in machine learning. In addition, we will describe how the newest and most efficient self-supervised learning framework for visual representations to this date works, called SimCLR, which was originally developed to obtain useful vector representations from static images. We will also explain what TS2Vec is, and how a combination of both approaches can be applied to the concept of a time series, and still be able to extract a vector representation of the subject described by the …

Microwave-Assisted Depolymerization Of Poly (Ethylene Terephthalate) Via Ethanolysis, Mayra Alejandra Gomez Cortez

Theses and Dissertations

In the search of providing an alternative form of combating the complex environmental concerns rising from the rapid growth of poly (ethylene terephthalate) waste in the world, this research focused on investigating the chemical recycling of PET via ethanolysis. Parameters such as temperature, reaction time, catalyst usage and concentration were investigated to promote depolymerization.

In this work, ethanolysis of waste PET under microwave irradiation was investigated using organocatalysts 1,5,7-Triazabicyclo [4.4.0] dec5-ene (TBD) and 1,8-Diazabicyclo [5.4.0] underc-7-ene (DBU). We evaluated the effectiveness of reaction conditions through a series of experiments and determined the optimum conditions as follows: 0.5 g of PET, …

The Processing Of /Ɪ/-/I/ And /Ɑ/-/Æ/ Contrasts In Spanish-English Bilingualism, Elizabeth M. Garza

Theses and Dissertations

The following study utilizes an experimental paradigm known as the Sequence Recall Task (Dupoux et al., 2001) to examine the processing of the English vowel contrasts /ɪ/-/i/ and /ɑ/-/æ/ among Spanish-English bilinguals. Using dominance scores calculated from the Bilingual Language Profile (Birdsong et al., 2011), this study examines the processing of these contrasts relative to a control contrast /u/-/ɛ/ as well as how the processing of these contrasts is modulated by participants’ English dominance. A total of 24 Spanish-English bilingual speakers participated in a Sequence Recall Task that targeted the processing of these three contrasts. The results indicate that participants …

Population Genetics Among Rhipicephalus Sanguineus Ticks In The Lower Rio Grande Valley, Bianca Liana Guerra

Theses and Dissertations

Rhipicephalus sanguineus is a common tick species in the lower Rio Grande Valley of both human and veterinary concern. Two lineages of R. sanguineus have been described across the United States known as the tropical and temperate lineage. Both lineages can be differentiated morphologically, genetically, biologically, and by vector competence. The species name for both lineages has not been well established therefore this thesis will utilize their widely used identification. Both lineages have been identified in Texas. While the distribution of these lineages has been well-defined in some regions across the world, recent studies have observed sympatric populations in certain …

Attitudes And Compassion Of Student Counselors-In-Training Toward Individuals Who Are Homeless, Kristine R. Gonzalez

Theses and Dissertations

With the increased numbers of homeless individuals over the past several years, it is important to consider factors that contribute to chronic homelessness, including barriers to service delivery that impede one’s ability to exit homelessness. The purpose of this quantitative study was to examine the attitudes and compassion among student counselors-in-training (SCITs) toward individuals experiencing homelessness as these students represent future mental health providers who will be serving the homeless, a highly marginalized population. A total of 162 graduate students from two southwestern Hispanic-serving institutions were recruited for the study. A correlational analysis, independent t-tests, and one-way ANOVAs were conducted …

Data Science For Hospital Antibiotic Stewardship, Saikou Jawla

Theses and Dissertations

Antibiotics are widely used to treat bacterial infections, but their misuse leads to antibiotic resistance. Antibiotic resistance is one of the biggest threats to global health, food security, and development today. Antibiotic resistance leads to higher medical costs, prolonged hospital stays, and increased mortality. Antimicrobial stewardship is an approach to measure and improve the appropriate use of antibiotics in healthcare settings. Data science has the potential to support these programs by providing insights into antibiotic prescribing patterns, identifying areas for improvement, and predicting patient outcomes. We explored the role of data science in hospital antibiotic stewardship programs, including statistical methods …