Digital Commons Network^™

Laser Assisted Direct Writing Of Liquid Metal For Microprinting Applications, Olga Vargas Cruz

Theses and Dissertations

This paper presents a research study for potential printing of a Liquid Metal (LM) Eutectic Gallium Indium alloy (EGaIn) through the applications of the innovative additive manufacturing technology LIFT (Laser Induced Forward Transfer). LIFT is a precise printing technology that allows to create small, detailed printing. The liquid metal in study, EGaIn, has demonstrated great potential for microelectronics applications due to its minimum toxicity and high conductivity. Throughout this research different printing parameters are studied to comprehend the behavior of EGaIn printing with LIFT technique, these include laser energy, laser pulse, receiver material substrate, donor layer thickness, and …

Using Statistical Clustering Of Trajectory Data To Support Analysis Of Subject Movement In A Virtual Environment, Martín Alejandro Galicia Avila

Theses and Dissertations

The rising use of virtual reality software requires new methods of spatiotemporal analysis to enhance the user experience. This investigation is focused on forming clusters from spatiotemporal trajectories within a virtual environment and analyzing them in search of human immersion and behavior insights. The cluster centroids are plotted and analyzed to identify associations with the trajectories and user demographics.

Comparing Socioeconomic Status To Educational Diagnosis Of Serious Emotional Disturbances: A Linear Analysis Of Texas Data, Cristina Rangel

Theses and Dissertations

This dissertation was prepared to determine if a correlation existed between a student’s poverty level and an educational diagnosis of serious emotional disturbance. I hypothesize that students at or under the United States’ definition of poverty are more likely to exhibit signs and symptoms of a serious emotional disturbance and therefore be diagnosed and placed in special education. Both federal data (i.e., poverty levels) and Texas data (i.e., dx of SED) were compared to determine correlation and directionality. TEA combines districts into 20 regions. Special education placement data is publicly available on State databases. Federal poverty levels are available …

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 …

Gaze Tracking Embedded Collaborative Robots For Automated Metrology And Reverse Engineering, Sachithra H. Karunathilake

Theses and Dissertations

Conventional geometric metrology, or three-dimensional (3D) scanning, and reverse engineering heavily rely on the experience of the operators. With an increasing need for automation, robot arms have been adopted for this task. However, due to the large variety of parts and designs, automated path planning could provide a scanning solution that may overlook the critical area, which could potentially deteriorate the scan results. This study explores the integration of collaborative robotics (cobots) with eye tracking technology to improve the autonomous 3D scanning process. The primary objective of this study is to enhance the accuracy and efficiency of cobots in …

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 …

Analyzing How Resiliency, Family Support, And The College Assistance Migrant Program (Camp) Contribute To Latina/O/X Migrant Farmworker Students' Ability At A South Texas Hsi To Continue Into The Second Year Of Study And To Degree Completion, Angelica Yvette Gonzalez

Theses and Dissertations

The purpose of the study is to identify the primary difficulties Latina/o/x migrant farmworker students face compared to non-migrant farmworker students regarding completing higher education and how they can overcome those barriers. Latina/o/x migrant farmworker students experience educational inequity that affects their potential to continue into higher education successfully. Although there is extensive research that analyzes the CAMP program effectiveness, migrant farm-worker students experiences, and the difficulties faced by migrant farmworker students in education, there is a gap in the literature that focuses on migrant farmworker students and their success in …

The Importance Of Emotional Intelligence And Leadership Development In Principal Efficacy, Lorine Olivarez Bazan

Theses and Dissertations

Recently, public schools have seen an increase in obstacles and challenges in the wake of the COVID-19 pandemic, and school leaders have had to pivot and adjust to meet these ever-changing demands (McLeod & Dulsky, 2021). Principals in today’s schools have had to discover new and innovative ways to successfully lead, motivate and support their school communities. This emerging leadership includes the leader’s ability to utilize emotional intelligence and leadership skills effectively and intentionally.

The purpose of this qualitative study was to take a deeper look at investigating the school principal’s utilization of emotional intelligence and effective leadership skills. This …

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 …

Rhythmic Ritual: Hand Papermaking As A Transformative Process, Keatan Mckeever

Theses and Dissertations

This thesis is an exploration of the transformative processes of hand papermaking, both personally and materially, through various artworks situated between two- and three-dimensional forms. The conceptual motivations supporting my practice are informed by intuition, locally sourced materials, human connection, material structure, and low-tech approaches to the papermaking process. In the first portion of this thesis, I discuss how I chose paper as my artistic medium, and the transformational process of hand papermaking through a historical lens. The second half follows the experimentation and limitations that informed my practice, the content of my work regarding material and structural qualities, and …

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 …

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 …

Reimagining Associate Degree Nursing Education: An Insider’S View, Ntiense E. Otu

Theses and Dissertations

The demographics of nursing students in the Associate Degree Nursing (ADN) program are diverse, hence the need for nurse educators to prepare and handle the challenges faculty face in the ADN program. Although many pieces of literature have addressed different modalities of instructional delivery and teaching methods in nursing education, transition experience of nurse educators, and teaching preparation and readiness, these are not evident in the ADN programs in the Rio Grande Valley (RGV). The teaching preparation of nurse educators and their utilization of instructional methods in the ADN program in the RGV is limited in the literature. This study …

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 …

A Combinatorial Proof Of Supercranks For Partitions With A Fixed Number Of Parts, Jacob J. Gutierrez

Theses and Dissertations

In a previous paper by Eichhorn and Kronholm, a selection of supercranks for p(n,m) was established by generating functions. In this paper we will reprove this result with combinatorial witnesses for the selection of supercranks via integer lattice points.

Attitudes Towards Mathematics Of Developmental Mathematics Students In A Community College, Benjamin Ortiz

Theses and Dissertations

Reformations to developmental mathematics aim to remove barriers for students entering higher education. Challenges like costly multi-course sequences and high failure rates prohibit students’ access to college-level math courses and prevent degree or certification completion. Understanding factors that foster student success is critical to increase student success. This study focuses on students’ attitudes towards mathematics, utilizing the novice-expert continuum through Code et al.’s Mathematical Attitude and Perceptions Survey (MAPS) instrument. Student expertise scores, including all MAPS dimensions and specific dimension scores, were assigned. Kruskal-Wallis Rank-Sum tests identified differences in student populations by course and attitude dimension. …

Case Studies Of Algebra 1 Teachers Selection And Implementation Of Mathematics Tasks Toward Situated Learning, Luis Román Sauceda

Theses and Dissertations

Mathematical tasks are vital in active learning, especially in situated learning. Adequate selection and appropriate implementation of tasks are steps toward success in engaging students for active learning. This study explored how a professional development (PD) workshop influences teacher participants’ capabilities in selecting, redesigning, implementing, and reflecting on mathematical tasks to promote situated and active learning. The teacher participants were Algebra 1 teachers from a South Texas secondary school. During the workshop, participants developed and implemented activities after being shown situated learning strategies to promote student-centered learning. They were required to design hypothetical dialogues to simulate their class practice before …

Quasipolynomials And The Unimodality Of Gaussian Polynomials, Paul Marsh

Theses and Dissertations

We illustrate a method to prove the unimodality of Gaussian polynomials ${N+m \brack m}$ for $m = 5$ and $6$, building upon Dr. Brandt Kronholm's work, which proved unimodality for $m = 2,3,$ and $4$. Our approach involves viewing coefficients $p(n,m,N)$ of Gaussian polynomials $N+m \brack m$ based on how far away $n$ is from the central coefficient $p(\lfloor\frac{mN}{2}\rfloor,m,N)$ and then creating generating functions for those coefficients. We then take the difference of neighboring generating functions and change those generating functions into quasipolynomials to verify that their coefficients are non-negative. While the generalization of these generating functions for the coefficients …

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 …

An Automatic Solver For Optimal Control Problems, Marcel Efren Benitez

Theses and Dissertations

Optimal control theory is a study that is used to find a control for a dynamical system over a period of time such that a objection function is optimized. In this study we will be looking at optimal control problems for ordinary differential equations or ODEs and see that we can use an automatic solver using the forward-backward sweep using Matlab to solve for them from an 1 dimension to bounded cases and to nth dimension cases.

Effects Of Short-Term Pesticides Exposure On Swimming Behavior, Tissue Morphology, Oxidative-Nitrative Stress, Antioxidant Expression, And Cellular Apoptosis In Kidneys Of Goldfish, Esmirna Cantú

Theses and Dissertations

The prevalence of pesticides in the aquatic environment continues to increase due to anthropogenic activities and poses a threat to aquatic organisms. The aim of this study was to determine the short-term exposure (one-week) of pesticide mixtures (metolachlor, linuron, isoproturon, tebucanazole, alconifen, atrazine, pendimethalin; azinphos-methyl) on swimming behaviors, kidney morphology, and expression of nitrotyrosine protein (NTP), dinitrophenyl protein (DNP), superoxide dismutase (SOD), catalase (CAT), renin, and cellular apoptosis in goldfish (Carassius auratus). Results indicated that both low- and high-dose pesticide mixtures decreased the distance swimming behavior. Histological analysis showed pesticide exposure alters kidney morphology. DNP, NTP, and renin expressions, and …

Mathematical Evaluation Of Ulnar Nerve Somatosensory Evoked Potentials (Sseps), Maribel Carmen Gomez

Theses and Dissertations

As the number of individuals suffering with low back and neck pain rises, we find people undergoing spinal procedures more often. In means, of safeguarding the patient and their neurological structures during the procedure intraoperative neuro-physiological monitoring (I.O.M) has been more widely used amongst surgeons orthopedic and neuro alike. During these procedures, a modality widely used for both low back and neck surgery is somatosensory evoked potentials (SSEPs). The aim of neuro-technicians is to obtain a baseline waveform that can be considered present and reliable. When obtaining SSEPs the technician can encounter obstacles with ’noisy’ wave-forms due to …

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 …

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 …

Mano De Obra: Exploring Processes And Materiality In Artwork, Karla Gabriela De La Fuente

Theses and Dissertations

This thesis paper examines the theoretical derivatives and artistic influences that drive the artist’s ongoing series of works exploring the human experience of the working class in the border region of South Texas and beyond. Through the use of found objects, organic regional materials, adopted and adapted processes; the artist creates artwork that teeters on a tightrope between sweet, subtle naivety, and sudden, robust spoonfuls of truth. The artwork has an emphasis on the materiality, and the parallel between the “Mano de Obra” of the artist at work and that of the working class of our communities.

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 …

The Impacts Of Caregiving And Social Support On Stress For Multiple Sclerosis: A Study On Informal Caregivers, Jacqueline Mercado

Theses and Dissertations

The purpose of the present quantitative study was to gain an increased understanding of the impacts of caregiving and social support on stress for unpaid informal caregivers of persons with Multiple Sclerosis. Caregiving for MS can be rewarding yet stressful. Informal caregivers are the primary source of ongoing home care for family members or friends with MS. Due to the complexity of care, caregivers are especially vulnerable to higher strain as they often feel unprepared for this role. This study examined perceived social support and demographic variables on caregivers' stress to gain insight into mediating caregiver psychosocial challenges. …

Postsecondary Students With Disabilities: Predictors Of Academic Performance/Gpa, Uzoamaka Barbara Okori

Theses and Dissertations

The determination of people with disabilities to enroll in postsecondary education did not remove the struggles and challenges of adjusting to the college environment despite the provisions of the legislation. Students with disabilities still had problems with degree completion, graduation rates, barriers caused primarily by their unwillingness to disclose their disabilities, and the support networks of these students. This study explores the relationship between the acceptance of disability, self-efficacy, support, and the academic performance/grade point average of postsecondary students with disabilities who receive disability accommodations through their institution’s disability service offices.

Although there has been an increase …

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 …