Digital Commons Network^™

High Temperature Oxidation Kinetics Of Alumina Forming Steels For Petrochemical Processes, Kao Zoua Yang

Theses and Dissertations

Petrochemical industries produce 14.33 million barrels of petroleum products a day and by 2023, are expected to produce over a trillion dollars in sales annually. Petroleum is the number one used fuel source and is the raw material used to produce a wide range of petrochemical products including ethylene which is the raw chemical precursors that is crucial to the polymer market. Ethylene is created by the process of cracking ethane and other hydrocarbons in steel reactors at high temperature and potentially oxidizing conditions. The cracking process produces a range of byproducts including a detrimental solid carbon, called coke, which …

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 …

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 …

Monitoring The Effectiveness Of Wildlife Exits And Bobcat Use Along A South Texas Highway, Jamie E. Langbein

Theses and Dissertations

Roadside exclusion fencing is commonly used to mitigate wildlife road mortalities and property damages caused by wildlife-vehicle collisions. A potential consequence is that animals may become trapped on the road by fencing. On State Highway 100 in South Texas, the Texas Department of Transportation installed ten wildlife exits (WE) allowing animals to exit the roadway through a modified opening in the fence. However, some individuals used the WE to access the roadway. In this study, a new design was implemented, with narrower openings, a ramp and a clear plastic one-way door. While the updated design prevented road access for wildlife, …

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, …

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 …

Chemical Investigation Of Dichloromethane Extract Of Aloe Vera Peels: An Agricultural Waste, Nazmul Huda

Theses and Dissertations

Aloe barbadensis Miller, commonly called Aloe Vera, is a widely popular succulent plant species cultivated across subtropical regions worldwide from India to the Tex-Mex border. Besides its historical uses, Aloe juice has garnered attention as a potential remedy for various ailments, particularly in treating various skin conditions and facilitating wound recovery, including obesity, diabetes, hepatitis, Crohn's disease, and ulcerative colitis. Regrettably, the agricultural practice following sap extraction involves discarding Aloe vera peels, constituting agricultural waste. As part of our continuous research on extraction, isolation, separation, and spectral characterization of value-added chemicals present in waste botanicals herein, …

Thin Film Piezoelectric Energy Harvesting Nanostructured Materials: Tailoring Size, Porosity, Morphology Of Zinc Stannate Perovskites (Abx3), Christopher Munoz

Theses and Dissertations

Three dimensional (3D) piezoelectric zinc stannate (ZnSnO3) nanoweb arrays are synthesized using a combination of treatment methods deposited in PDMS thin films for electrochemical analysis of its piezoelectric response. Advantages of hydrothermal, molten salt, and solvothermal synthesis methods were leveraged to facilitate several chemical and surface engineering techniques. The combination of these treatments reduce the size of zinc stannate to approximately ~40nm-80nm weblike networks, much smaller than previously reported ZnSnO3 sub-micro cubes. Scanning electron microscopy (SEM) and X-Ray Diffraction (XRD) analysis reveal a mesoporous protonated tristannate (H2Sn3O7) nanoweb template with connecting wirelike strands having diameters ranging from 12-27nm across and …

Enhancing Time Series Hashing Performance Via Deep Orthogonal Hashing, Mahmudul Hasan Robin

Theses and Dissertations

Deep hashing has been widely used for efficient retrieval and classification of high-dimensional data like images and text. However, its application to time series data is still challenging due to the data’s temporal nature. To tackle this issue, a new deep hashing method has been proposed that generates efficient hash codes and enhances the time series hashing performance using a ResNet model with Orthohash (Cosine Similarity Loss). The proposed method uses one loss architecture while using ResNet model for efficient hashing. It uses the Character Trajectories dataset to extract discriminative features from the time series data. These features are then …

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 …

Robust And Uncertainty-Aware Image Classification Using Bayesian Vision Transformer Model, Fazlur Rahman Bin Karim

Theses and Dissertations

Transformer Neural Networks have emerged as the predominant architecture for addressing a wide range of Natural Language Processing (NLP) applications such as machine translation, speech recognition, sentiment analysis, text anomaly detection, etc. This noteworthy achievement of Transformer Neural Networks in the NLP field has sparked a growing interest in integrating and utilizing Transformer models in computer vision tasks. The Vision Transformer (ViT) model efficiently captures long-range dependencies by employing a self-attention mechanism to transform different image data into meaningful, significant representations. Recently, the Vision Transformer (ViT) has exhibited incredible performance in solving image classification problems by utilizing ViT models, thereby …

Robust Uncertainty Estimation Framework In Deep Reinforcement Learning For Active Slam, Bryan Joseph Pedraza

Theses and Dissertations

Autonomous mobile robots are essential in various domains such as industry, manufacturing and healthcare. Navigating autonomously and avoiding obstacles are crucial tasks that involve localizing the robot to explore and map unknown environments without prior knowledge. Simultaneous localization and mapping (SLAM) present significant challenges. In this study, we introduce a new approach to address robust navigation and mapping of robot actions using Bayesian Actor-Critic (A2C) reinforcement learning. The A2C framework combines policy-based and value-based learning by dividing the model into two components: (1) the policy model (Actor) determines the actions based on the state, and (2) the value model (Critic) …

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 …

Effects Of The Build Orientation And Support Patterns On The Geometric Accuracy In Printing Parts With Overhang Structure: An Experimental Study, Bala Murali Krishna Mohan

Theses and Dissertations

Additive manufacturing is becoming increasingly popular in industries such as manufacturing due to its ability to use raw materials more efficiently and require less machining than traditional methods(Calignano et al., 2017). However, constructing overhanging structures in additive manufacturing can be challenging, potentially affecting the overall geometric quality of the printed components. The objective of this study was to identify the most effective printing orientation for overhanging designs in Fused Deposition Modeling (FDM) using two different support structures. To achieve this, the researchers used a laser scanner to collect point cloud data and conducted a comparative study to determine the …

An Empirical Study Of The Relationship Between Board Chairperson Activism, Board Gender Diversity, Board Gender Inclusion, And Firm Performance, Phyu Phyu Aung Myint

Theses and Dissertations

This dissertation empirically examined the effect of board chairperson activism and board chairperson power on board gender diversity, board gender inclusion, and firm performance using a sample of boards of Fortune 500 firms. Board chairperson activism, in this dissertation context, refers to board chairpersons taking actions such as speaking out on, advocating for, or actively supporting gender equality or women leadership in business. Board gender diversity refers to the gender heterogeneity of directors in the boards whereas board gender inclusion refers to the extent to which women directors are given opportunity to participate and contribute to …

Meeting Students’ Needs To Improve Motivation And Higher Academic Achievement In Rio Grande Valley Schools, Tanya Jessica Reyes

Theses and Dissertations

Educational systems are to prepare students for future success in our ever-changing world. Administrators must realize that before a student is willing to learn, crucial needs must be met, especially in low-socioeconomic areas such as the Rio Grande Valley. Some basic needs consist of food and shelter, which are vital for survival. Other needs deal with one’s social and emotional needs that support a child's safety, sense of belonging, and their self-esteem. In this study, focus groups were conducted with sixth, seventh, and eighth grade student participants that gathered the phenomenon of their experiences and their fulfillment of needs …

A Psychometric Validation Of The Spanish Translation Of The Coping Inventory In A Latinx Population, Daniela Chavez

Theses and Dissertations

Research efforts to comprehend coping strategies in response to stress within the Latinx/Hispanic community have been limited. The inability to effectively cope with stress can lead to physical and mental health problems in adults. This study aims to test the psychometric properties of the translated version of a recently developed coping assessment, “The Coping Inventory,” to evaluate its validity among Spanish-speaking Latinx individuals. The results indicate that The Coping Inventory demonstrates reliability and validity among this population. These findings can enhance the measurement of coping strategies within the Latinx/Hispanic community, potentially resulting in improved …

A Qualitative Case Study: Exploring Elementary Principals’ And Teachers’ Perceptions Of Teacher Leadership, Cathy De Leon

Theses and Dissertations

This qualitative case study examined the perceptions of one principal and 10 teachers from a school district in the Rio Grande Valley regarding how leadership is distributed in their schools through the lens of distributed leadership. This study contributes to the small body of literature regarding teacher leadership to foster dialogue and potentially provide opportunities for teachers to take on leadership roles. Recently, the expectations for schools have increased to the extent that leaders are now expected to ensure all students are learning at prominent levels. Today’s public-school principals may benefit from the support of teacher leaders. Results of …

Investigating Programmer Bias Transfer To Computer Tasks Among Hispanic Csci/Cmpe Students In A Minority-Serving Institution, Ana Cecilia Sánchez Ramos

Theses and Dissertations

Algorithm-driven systems are increasingly being used across a variety of settings (Center for Democracy and Technology, 2020; O’Neil, 2017; Sauppé and Mutlu, 2015). However, many everyday technologies are imbued with racial biases that unfairly discriminate against racially marginalized groups (Hankerson et al, 2016; Crawford, 2016; O’Neil, 2017). While sources of bias like the unintended overrepresentation of elements in an algorithm’s dataset have been well researched (Hankerson et. al, 2016; Lee, 2015), the transfer of personal prejudices onto a system remains understudied. Here I address this issue and draw from Sociological literature on organizational theory, assimilation, and colorblind ideology to develop …

Texas School Social Workers: Demographics, Work Characteristics, Job Satisfaction, And Work Barriers And Facilitators, Astrid Gandaria

Theses and Dissertations

This study examines the demographics, and job, services, responsibilities, barriers, facilitators, and satisfaction of Texas school social workers. A survey was emailed to Texas school social workers identified on a state list. A convergent parallel mixed method design was used to compare and discuss quantitative and qualitative data obtained. The data reveal consistency with existing school social work literature related to demographics and provided novel information on work characteristics, job satisfaction, work barriers and facilitators, and program preparation of school social workers. The data shows school social workers are highly involved …

A Victim No More: An Arts-Based Autoethnographic Inquiry, Richard D. Edmonson

Theses and Dissertations

Heteronormative culture and curriculum have traditionally prevailed within the college classroom (MacGillivray, 2000). Many LGBTQQIA+ students still find challenges regarding acceptance and integration which may impact their learning experiences (Nodin 2022). Addressing heteronormative curriculum and pedagogy includes discussing the relevance of LGBTQQIA+ inclusivity, visibility, and histories. For schools to become safe and welcoming environments for members of the LGBTQ+ community, and for the negative consequences of heterosexism to diminish for all, homophobia, heterosexism, heteronormativity, and heterosexual privilege must all be explicitly addressed and interrogated in students’ learning (Nunn & Bolt, 2015). One of the ways to do this and ameliorate …

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 …

Professional Development, Digital Platforms, And Middle School Education During Covid-19, Cynthia Susan Castro

Theses and Dissertations

The COVID-19 outbreak shifted towards online learning, requiring educators and administrators to adapt to new digital platforms and technologies quickly. The purpose of this quantitative study is to examine whether there is a significant difference in the frequency of use of digital platforms among middle schools. Secondly, it explores the relationship between teachers' attendance at professional development sessions and their integration of Nearpod lessons during the pandemic. Lastly, it investigates the relationship between the time campus principals invested in technology-related professional development and teachers' adoption of digital platforms at their respective campuses. Surveys and administrative records were …

Addressing Engagement: Student Perceptions Of Meaningful Gamification In Online Courses, Jessica M. Sanchez-Barrera

Theses and Dissertations

Although there is high enrollment in online college courses, there are concerns about student engagement (Martin & Bolliger, 2018; Dumford & Miller, 2018). Gamification has been shown to have the potential to improve student engagement. The purpose of the study was to describe how academic student engagement is impacted by Nicholson’s Meaningfully Gamified online course compared to traditionally taught online course. An embedded multiple case study research design was employed using self-determination theory as the theoretical framework to measure engagement. The theory constructs analyzed were autonomy, competence, relatedness, and student engagement. The research was conducted …

Being A Trafficked Teacher: An Asiancrit Autoethnography Exploring The Exploitation Of Filipino Migrant Teachers In Louisiana, Christopher R. Jose

Theses and Dissertations

The purpose of this autoethnographic study is to critically explore the lived curriculum of Filipino migrant teachers trafficked by a Louisiana school district using the theoretical lens of AsianCrit. Using the different tenets of AsianCrit, this study wrestles with the injustices of this lived curriculum as connected to a broader set of hegemonic curricular experiences and demonstrates the ways such injustice still permeates the lived curriculum of migrant teachers. It explores its discussion on critical race theory in education, migrant teachers and human trafficking in the United States. This study shares the effects of human trafficking of teachers and the …

Level Of Opportunity For Translanguaging In A One-Way Dual Language Program, Cristina Flores

Theses and Dissertations

In the context of language diversity in schools, this research underscores the persistence of monolingual academic standards despite linguistic variety. Bilingual education, historically intertwined with sociopolitical agendas aligning with dominant societal power structures, necessitates a paradigm shift. Bilingual educators must empower students to utilize their complete linguistic repertoire, fostering creative language expression through translanguaging (Sánchez et al., 2018, p.13). This approach challenges superficial language norms, potentially deviating from the standard language codified by a powerful central group.

The study delves into the types of language practices teachers permit, promote, or prohibit and examines teachers' perceptions regarding the constraints of a …

Strategies Community College Mexican American Adult College Algebra Students Use When Graphing Function Transformations, Roxana Pamela Jimenez

Theses and Dissertations

This qualitative case study pursued to describe the different strategies Mexican American adult students in a local community college used to graph function transformations. Participants in the study were purposefully selected using a criterion sampling to ensure participants were atypical, above average students between the ages 18-22, and had a final course average of 89.5-100 in College Algebra. Three research questions were examined 1) In what ways do Mexican American adult college students graph a function transformation? 2) Which strategies do students implement when graphing a function transformation? Qualitative research methods using think aloud semi-structured interviews were used in this …

Perspectives On Educational Technology Integration From District And School Leaders Before, During, And After The Lifting Of The Covid-19 Pandemic Restrictions, Alma Delia Cardenas-Rubio

Theses and Dissertations

The integration of educational technology is pivotal in enhancing classroom instruction. School administrators must possess a clear vision and the necessary skills to leverage emerging technologies effectively (Yu & Prince, 2016). This mixed methods research study explores trends, challenges, and experiences related to educational technology leadership throughout the COVID-19 pandemic. Employing an autoethnographic approach and survey data, the study aligns with the Future Ready Framework's seven interconnected components: curriculum, instruction, and assessment; personalized professional learning; budget and resources; use of space and time; robust infrastructures; data and privacy; and community partnerships. The narrative provides insights into a …

A Case Study Of Student And Faculty Experiences In A High-Achieving Early College High School Along The Texas-Mexico Border, Kelly Louis Stuart

Theses and Dissertations

This study explores the high academic achievement of Excelencia Early College High School (EECHS), located along the Texas-Mexico border. An open-enrollment public school, EECHS serves students who are characteristic of the lower Rio Grande Valley. These include students of low socioeconomic backgrounds, minorities, first-generation, and those typically underserved by higher education. Over two years, seven student focus-group interviews and fifteen faculty personal interviews were conducted. These interviews addressed key research questions such as: What are the lived experiences of students and faculty at this high-achieving school? What motivates students to overcome challenges and …

Examining The Increasing Prevalence Of Academic Dishonesty: An Investigation Of Students’ Perceptions Of Academic Integrity In Higher Education, Luis Angel Garcia

Theses and Dissertations

A primary concern in academic institutions is the high frequency of academic dishonesty among students. Concerns surrounding this issue negatively affect the institution’s reputation and the acquisition of external funding. The purpose of this research was to explore the increasing prevalence of academic dishonesty at higher education institutions. Furthermore, the aim of the study is to investigate the frequency of students engaging in academic dishonesty, reasons for academic dishonesty, and awareness of academic dishonesty. Increasing awareness, prevention, and education regarding academic dishonesty can bring a positive environment to students in higher education. The participants were students enrolled in The University …