Digital Commons Network^™

Self-Efficacy, Locus Of Control, And Their Effect On Online Returning Students' Graduation, Matthew Dean Greene

Theses and Dissertations

The aim of this study was to understand the factors that affect returning students' ability to complete their degrees through online degree programs. Logistic regression was used to determine which factors had a significant relationship with persistence to graduation and how they contributed to the odds of students graduating. The findings show that academic locus of control and academic self-efficacy had a significant positive relationship with returning student persistence to graduation, with the locus of control contributing to the odds of graduation more than self-efficacy. Additionally, the amount of time between the student's initial dropout and subsequent return to complete …

Invisibility, Confusion, And Adjustment:Exploring The Grief Experience Of Grandmothers Supporting Their Bereaved Grandchildren, Jordan Robertson

Theses and Dissertations

Bereavement is painful at any time of life. For young children experiencing bereavement, grandmothers are often the first line of defense. Grandmothers are frequently called upon when their family members experience an out-of-order death, and while they are willing to provide care, grandmothers don't always know the best way forward. This qualitative study sought to learn more about the grief experiences of 22 grandmothers who had lost a family member prematurely through semi-structured interviews and Interpretive Phenomenological Analysis. Findings suggest (a) grandmothers experience layered grief in that they grieve the loss of the family member, experience the pain of the …

Genomic And Proteomic Analysis Of Five Vi01-Like Phages Reveals Wide Host Range And Multiple Tail Spike Proteins, Evan Harris

Theses and Dissertations

The number of illnesses attributable to antibiotic resistant bacterial infections are on the rise. According to the CDC, by 2050, complications due to antibiotic resistant infections are set to become the most prevalent cause of death worldwide, overtaking both cancer and heart disease in number. We are required to look for supplements to aid antibiotics in the fight against bacteria because it's becoming increasingly clear that antibiotics alone will fail in the face of multidrug-resistant strains. Bacteriophages are natural killers of bacteria and can thus be weaponized to treat multidrug-resistant infections. When a phage is discovered, our databases need to …

Role Of The Chief Data Officer In Government, Adita Karkera

Theses and Dissertations

Government data, whether in physical or digital form, has been collected for as far as memory can take us. However, government entities today are grappling with complex heterogeneous data systems. The transformation in data collection and management was profound in 2018 due to the enactment of the Foundations for Evidence-Based Policymaking Act. This legislation heightened the emphasis on curating, analyzing, and utilizing data to enhance decision-making, mandating federal agencies to appoint a Chief Data Officer (CDO) responsible for orchestrating the strategic use of data within the organization. While the overarching goal of a government CDO is to strategically harness an …

Characterizing Stress Granule Regulation By Pas Kinase, Ataxin-2 And Ptc6 And Investigating The Lifespan Of Covid-19 Virus On Currency, Colleen R. Newey

Theses and Dissertations

The protein Ataxin-2 is a known positive regulator of stress granules in humans, mice and yeast (known as yeast PBP1). Due to the role that stress granules play in diseases including Amyotrophic Lateral Sclerosis (ALS) and cancer, this thesis investigates the role of Ataxin-2 and its protein binding partners in stress granule development and its effects on various metabolic phenotypes of the cell. PAS kinase is a sensory protein kinase, conserved from yeast to man, which regulates respiration and lipid biosynthesis. Our lab discovered that PAS kinase phosphorylates and activates Ataxin-2 in yeast, and that PAS kinase overexpression enhances localization …

Soil Health In American Sports Fields, Miria C. Barnes

Theses and Dissertations

Healthy soils are essential for sustaining the world's ecosystems and maintaining human lifestyles. The adoption of biological, chemical, and physical analyses to assess soil health is a relatively new concept with a paucity of scientific work assessing how these metrics are affected by field management in urban systems Soil samples (n = 110) were collected from a diverse range of sports fields and, for comparative purposes, golf courses, farm fields, non-sport urban, undisturbed forest, and non-vegetated sandy soils. The samples were then analyzed using biological, chemical, and physical metrics to determine if there were significant differences between sport/golf venues and …

Twitch Chat Advertising: How Live Chat Valence Affects Consumer Advertising Perceptions, Austin W. Camper

Theses and Dissertations

The streaming platform Twitch.tv, is a popular video streaming website where users can watch, communicate, and chat with streamers and other viewers live. Twitch and other live streaming websites typically offer viewers a chat window where the viewer can chat (in real-time) with the streamer and other viewers who are currently watching the stream. Research in live streaming platforms like Twitch and the effects of their various features are novel. The purpose of this study is to analyze how the sentiment of a live chat (positive or negative) and the stated or not stated disclosure of an advertisement posted in …

An Inexpensive, 3d Printable, Arduino And Bluray-Based, Confocal Laser And Fluorescent Scanning Thermal Microscope, Justin Loose

Theses and Dissertations

The Fluorescence Scanning Thermal Microscope (FSTM v3.0), was designed to create an inexpensive, and easily manufactured, device for measuring the diffusivity of samples with microscopic locational precision. This was accomplished by using a Blu-ray device known as a PHR-803T, referred to in this work as a PHR. The optics in the PHR are nearly identical in function to conventional devices used in thermoreflectance microscopy, making the PHR extremely useful to integrate into the FSTM design. The focus of this thesis is the application of the FSTM as a confocal microscope using 3D printed components and various low-cost devices to operate …

Modeling The Influence Of Vibration On Flow Through Embedded Microchannels, Joseph S. Seamons

Theses and Dissertations

The influence of vocal fold (VF) vibration on perfused flow through VF vasculature is an area of research that has previously received limited attention. The aim of the research presented in this thesis was to contribute towards an improved understanding of the effects vibration on perfusion through vasculature within the VFs. This was done using a series of computational simulations of geometric changes to, and perfusion through, microchannels embedded in VF models. A computational structural model based on synthetic VF models used in previous experimental studies was first developed. The model and its embedded microchannel were initially studied under static …

Using Quantitative And Kinetic Proteomics To Explore Proteostasis, Nathan Raul Zuniga Pina

Theses and Dissertations

Every cell consists of carefully orchestrated biomolecules such as lipids, carbohydrates, and proteins. To maintain internal stability (homeostasis), cells maintain the right amount of these molecules at the right time and at the right place. This process is especially true for proteins since they are the foundation functional units within the cell. Proteins form structures and perform chemistry that bestows cells overarching functional roles. Cells maintain protein homeostasis (proteostasis) by modulating synthesis, folding, and degradation processes (turnover) to maintain the abundance levels for all proteins. This is the foundational kinetic model of proteostasis that is covered in this work, and …

Novel Fire And Herbivory Regime Impacts On Forest Regeneration And Plant Community Assembly, Devri A. Tanner

Theses and Dissertations

Human activities are increasing the occurrence of megafires that have the potential to alter the ecology of forest ecosystems. The objective of this study was to understand the impact of a 610 km2 megafire on patterns of forest regeneration and herbivory of three forest types (aspen/fir, oak/maple, and pinyon/juniper) within the burn scar. Sapling density, meristem removal, and height were measured across a transect network spanning the area of the burn scar over three years from 2019-2021. The network consisted of 17 burned/unburned transect pairs in adjacent burned/unburned forest stands (6 aspen/fir, 5 oak/maple, and 6 pinyon/juniper). Species that regenerated …

Uniquely Tailored Ionic Materials For Implementation In Energy, Imagining, And Antibacterial Applications, Amanda Jalihal

Theses and Dissertations

In this dissertation, the novel class of ionic materials is explored. Ionic materials are easily tuned and tailored to fit a wide variety of applications. The synthesis of ionic materials is extremely simple and prompt. Briefly, two ionic moieties are joined electrostatically through a double displacement resulting in a new compound without complicated synthesis. This process leads to a close proximity of the ions which allows for enhancement of the FRET mechanism between a fluorophore and chromophore. A potential application of a FRET active ionic material is explored as a photosensitizer using IR820 and Nile Blue A. The ionic material, …

On The Duty Of Uncivil Disobedience: Thoreau's Action From Principle, Alan F. Garcia

Theses and Dissertations

This thesis explores the uncivil disobedience evident in some of Henry D. Thoreau’s work, which is often regarded as the birth and foundation of what is today known as “civil disobedience.” Using the nature of Thoreau’s subtle language and his philosophy of action from principle in his writings, including “Resistance to Civil Government” (1849), Walden (1854), “Life Without Principle” (1863), “A Plea for Captain John Brown" (1859), and some of his real life actions, this thesis will examine the antagonistic and, perhaps, uncivil nature of Thoreau’s so-called “civil disobedience.” This thesis will also incorporate Sophocles’ play Antigone (441 BBC), Candice …

Political Rhetoric And Latino Public Opinion: A Study Of Abortion In The U.S., Fernanda Valdez

Theses and Dissertations

This thesis studies political rhetoric and Latino public opinion on abortion in the United States. Mainly, this thesis asks: Is political rhetoric on abortion shaping the Latino vote? This thesis conducted a content analysis of political rhetoric through speeches, interviews, debates, political advertisements, and social media accounts from Democratic and Republican gubernatorial candidates. The gubernatorial races studied in this thesis are those from California and Texas from 2010 to 2022. In the content analysis, this research accounted for words and phrases that referenced abortion and the type of arguments (reproductive rights-based and moral-based arguments) made in those references. Then, this …

Economic Governance And Violence: A Cross-National Analysis, Steven Mccain

Theses and Dissertations

Understanding how economic governance influences routine activities is crucial within the field of criminology to better understand how grounds for violence emerge. Literature of cross-national studies concerning the effects of economic governance has recently developed to study its relationship with violence, specifically homicide. However, there is a deficit of frameworks related to criminological theory in this literature. Using a routine activity framework, the current dissertation seeks understand how different degrees of economic governance in general and, more specifically, the five areas of economic governance – size of government, legal system and property rights, sound money, freedom to international trade, and …

"Maybe I Shouldn't Have Worn Such High Heels" Examining Self-Presentation Expectations For Corporate Women Using Communication Theory Of Identity, Taylor E. Mack

Theses and Dissertations

The present study examines how corporate women use self-presentation in the workplace to communicate professionalism. The study utilizes Communication Theory of Identity (CTI) to consider the self-presentation experiences of corporate women. CTI identifies four identity layers: personal, relational, enacted, and communal, which interact and influence each other as individuals attempt to define themselves. Through semi-structured, in-depth interviews with corporate women, the present study found the following results: women often receive communication regarding self-presentation standards from peers rather than formal policies, self-presentation expectations have become more casual and diverse, women still encounter challenges resulting in the need to (re)negotiate their identity, …

Examining Social Factors Influencing Latino Students' Academic Learning In Rio Grande Valley Via A Quantitative Design, David T. Smith

Theses and Dissertations

This research study aimed to examine the social factors that could influence the academic learning experiences of Latino college students. Hispanic students are pursuing post-secondary degrees at a higher rate than in previous years. Many Hispanics represent their respective family members as the first members of their respective families to attend college (Trevino & DeFreitas, 2014). The academic achievement of Latino college students is becoming a major concern in the United States due to their growing population and special needs (Trevino & DeFreitas, 2014).

It is imperative to examine the social factors that could affect the academic learning experiences of …

Greening The Cement Industry In Egypt: Exploring Decarbonisation Policies For The Cement Industry, Saleh Elghamrawi

Theses and Dissertations

The cement industry is a major contributor to global greenhouse gas emissions, accounting for approximately 7% of carbon dioxide (CO2) emissions. Cement is the most consumed material on earth, second only to water, and its demand is fueled by continuous urbanization and the lack of alternative materials. In Egypt, the cement sector is responsible for 14% of CO2 emissions, emitting over 800 kilograms of CO2 per ton of cement, surpassing the global average of 600. In 2016, Egypt ratified the Paris agreement to address climate change and has committed in its National Determined Contributions (NDC) to reduce CO2 emissions. However, …

Examining The Conditions Affecting The Success Of Income-Generating Activities By Refugees: A Focus On Programs Provided By Ingos In Egypt., Wesal Elkorashy

Theses and Dissertations

With the global decline in resettlement opportunities for refugees in the so-called Global North, many displaced populations are hosted in the Global South. The shift towards first asylum and transit countries often places them in environments where economic stability is often elusive, coupled with legal, social, and cultural barriers. In this challenging situation, addressing refugees' economic lives resilience, and their contribution in the overall economy of host countries becomes increasingly urgent. This is intrinsically linked to the support provided by humanitarian organizations, particularly INGOs, which play a pivotal role in implementing economic programs aimed at increasing refugees’ engagement in the …

Characterization Of Human Mobility From Cellular Data, Zaid Matloub

Theses and Dissertations

This dissertation investigates human mobility patterns using crowd-sourced cellular network data from different Metropolitan Statistical Areas (MSAs) in the United States, spanning the Houston, New York-Newark, NJ City, and 13 other significant MSAs. By focusing on prominent spatial mobility parameters highlighted in existing literature, the study unveils consistent findings regarding the predictability of human mobility across diverse time scales and geographic regions. The research underscores the significance of selecting appropriate sampling thresholds based on the mobility parameters being examined, the size of the dataset, and available computational resources. Through a meticulous analysis, it emerges that while values such as mean …

The Quiet And Other Fantastical Tales, Emily Nicole Cerda

Theses and Dissertations

This thesis briefly discusses the genres and subgenres of speculative fiction—focusing on fantasy, horror, and science fiction—and is primarily a short story collection that also includes a few novel chapters. The critical introduction delves into the present and overly complex subgenre categorization methods, how and why new subgenres are created, and provides simple definitions for the main genres of speculative fiction and fantasy subgenres.

The subgenres that will be discussed through either a short story, novel chapter(s), or definition include, but are not limited to: fairytales, portal fantasy, paranormal romance, dark fantasy, historical fantasy, magical realism, epic fantasy, mythic fiction, …

Overexpression Of Ubtf Correlates With Aggressive Phenotypes Of Prostate Cancer Cells, Guillermo Andres Saldana

Theses and Dissertations

Prostate cancer (PrCa) is one of the most common malignancies in men globally and the second leading cause of cancer associated deaths in developed countries. Accumulating evidence have demonstrated involvement of various molecular and cellular factors in the development, progression and chemoresistance of PrCa and many of them were successfully established as potential molecular targets for therapy. Despite these advancements, the underlying mechanisms of PrCa occurrence is still unclear, which limits the diagnosis and therapy. Therefore, it is an urgent need to discover potential molecular targets which can be used in rational design of new strategies for the prevention and …

Aedes Aegypti Host Preference On Canines Versus Human Volatile Skin Compounds, Melissa Bernadette Rosalez

Theses and Dissertations

It is critical to understand how Aedes aegypti mosquitoes detect hosts through cues such as volatile skin compounds. In South Texas, evidence suggests that this mosquito is showing a feeding preference for canines over humans. This shift may impact the transmission of Dirofilaria immitis, canine heart worms, in local dog populations. Our study is set to explore Ae. Aegypti attraction to hosts using canine and human volatile compounds. Volatile skin compounds will be collected using a volatile collection system. Compounds will be analyzed using gas chromatography/mass spectrometry. It is anticipated that the main volatile skin compounds amongst humans are nonanal, …

The Wackiness Of Wacky World, Michael Dan Mccormick

Theses and Dissertations

This critical introduction takes a closer look at the situations presented in my manuscript “Wacky World” and offer insight on the actions seen from the main character. This insight is meant to clear confusion as to whether or not the character can be viewed as a heroic figure and explore his personality to draw conclusions. “Wacky World”, a full-length play, tells the story of a man with an obsession with a defunct theme park and the deranged actions that he takes in order to prevent its demolition.

I explore the topic on whether or not sympathy …

Growth Rates, Morphology, And Potential For Mariculture Of The Southern Population Of Crassostrea Virginica In The Lower Laguna Madre, Texas, Jerad Lee Fuelling

Theses and Dissertations

The Eastern Oyster also known as Crassostrea virginica, is an important resource here in the United States. Historically, this species has been overfished, poorly managed, and plagued by disease. Oyster mariculture is a growing industry here in the United States and is a sustainable solution to producing oysters. Texas has become the last coastal state to legalize oyster mariculture which means there is now a vast coastline with many unique bay systems that are open to this industry. One bay system that is particularly unique is the Lower Laguna Madre which is a hypersaline lagoon. Little is known about …

Electrolysis Degradation Of Cyanuric Acid In Wastewater At Cu/Go Cathodes, Chioma Chinwe Nwakanobi

Theses and Dissertations

This work evaluates the development of electrochemical processes for the oxidative degradation of persistent organic chemicals in waste waters, specifically the oxidation of cyanuric acid in the presence of NaCl at Cu/GO cathodes and Ti anodes. The experiment used a graphene oxide doped copper mesh cathode to examine different concentrations of cyanuric acid (30 mg/L, 40 mg/L, and 50 mg/L) and various concentrations of NaCl electrolyte (0.007mol/L, 0.03mol/L, 0.07mol/L, 0.1mol/L, and 0.2mol/L). In addition, the effect of pH (2, 4, 6, and 8), and applied current (0.200A, 0.150A and 0.100A) were studied. The Cu/GO electrode played a central role in …

Private Ethereum Blockchain Implementation And Its Security Features For Smart Home Iot, Hasibul Grande Alam

Theses and Dissertations

The security and privacy of IoT devices have become primary concerns as smart home networks are connected to the internet. Ethereum blockchain can be a solution to mitigate or prevent attacks – sniffing attacks, malware attacks, Eavesdropping, and Distributed Denial of Services (DDoS) attacks. Deploying Ethereum in resource constraint IoT devices is challenging due to resultant energy consumption, computational overhead, and delay. We adopted smart home as a case study to examine our methodology as a model for general IoT applications. This thesis work presents the implementation of private Ethereum blockchain that is optimized and installable on smart home IoT. …

Sustainable Cities: Life-Cycle Cost Analysis Of Integrating Piezoelectric Harvesters Into Roadways, Heba Mohamed Gaber

Theses and Dissertations

Energy is essential in our modern era. Because of the increasing electricity consumption, sustainable and Renewable energy became a necessary global approach to fill the gap of the ongoing energy shortage in addition to the climate change crisis due to using conventional ways for energy production. Renewable energy is a global approach that has achieved great accomplishments during the last decades and is gradually increasing. Energy harvesting is considered one of the main resources for renewable energy. Energy harvesting from the roadways is an ingenious horizon for sustainable, clean, and renewable energy generation. Harvesting energy from the roadways by using …

Relationship Between Socioeconomic Status And Incidence Of Specific Learning Disability: A Quantitative Study, Nora Nevarez

Theses and Dissertations

This quantitative study used a linear regression model to determine if a relationship exists between one independent variable (i.e., Socioeconomic Status) and one dependent variable (i.e., Specific Learning Disabilities). State level data was collected from publicly available databases in the State of Texas that delineate the percentage of students diagnosed with and placed in special education under the umbrella of Specific Learning Disabilities. These percentages were aggregated into the 20 Texas Educational Regional Service Centers. Additionally, national data was collected from publicly available databases listing the percentage of students at or under the age of 18 years old …

Intellibeehive, Christian Ivan Narcia-Macias

Theses and Dissertations

Utilizing computer vision and the latest technological advancements, in this study, we developed a honey bee monitoring system that aims to enhance our understanding of Colony Collapse Disorder, honey bee behavior, population decline, and overall hive health. The system is positioned at the hive entrance providing real-time data, enabling beekeepers to closely monitor the hive's activity and health through an account-based website. Using machine learning, our monitoring system can accurately track honey bees, monitor pollen-gathering activity, and detect Varroa mites, all without causing any disruption to the honey bees. Moreover, we have ensured that the development of this monitoring system …