Digital Commons Network^™

Feasibility Study Of Perovskite Solid Electrolyte For Electrochemical Lithium-Ion Cells, Danyi Sun

Theses and Dissertations

To achieve a high energy density in lithium-ion batteries (LIB), replacing the graphite anode with lithium metal is essential, as it offers a theoretical capacity of 3840 mAh/g.(Q. Wang et al. 2021) However, the use of lithium metal anodes is restricted by the formation of lithium dendrites, which can cause short circuits.(Wood et al. 2016) Solid-state electrolytes present a viable alternative to conventional liquid electrolytes by potentially mitigating dendrite growth. Among these, the perovskite-type Li3/8Sr7/16Ta3/4Zr1/4O3 (LSTH) stands out due to its excellent ambient stability, although its synthesis, properties, and applications remain underexplored.(Y. Li et al. 2018) In this study, I …

Harvesting Health: The Role Of City Policy In Urban Agriculture And The Downstream Effects On Youth, Lesley Leake

Theses and Dissertations

Contextualizing environmental health within the socio-ecological framework, acknowledges the diverse factors at play in the environment-human dynamic. The research design, methods, and study populations of each chapter vary to match the socio-ecological level(s) of focus and reinforce the translational and interdisciplinary nature of this research. Chapter 2 examines the policy-supports for urban agriculture using a mixed-methods case-study of the City of Charleston, SC to understand how municipal policy (societal) impacts urban agriculture implementation (community) and what impact this has on residents (relationship and individual). Chapter 3 centers on the potential impact of urban farms (community) and their programming (community and …

Innovative Strategies For Healthcare Data Integration: Enhancing Etl Efficiency Through Containerization And Parallel Computing, Ehsan Soltanmohammadi

Theses and Dissertations

The healthcare industry is rapidly transforming due to technology adoption, resulting in an explosion of data. Extract, Transform, Load (ETL) processes are crucial for integrating and analyzing this data to support decision-making and enhance patient care. However, ETL processes face significant challenges, including data diversity, quality issues, security and compliance, and scalability. Opportunities exist to optimize ETL processes through advanced technologies like big data analytics, containerization, and parallel computing, improving data quality, and enhancing security. This literature review examines current ETL processes in healthcare, highlighting challenges and opportunities for future improvement, ultimately aiming to enhance healthcare outcomes and patient experiences. …

Information Exchange Through Social Networks Links To Adoption Of Child Feeding Practices In Nepal, Mohammad Masudur Rahman

Theses and Dissertations

While there have been notable decreases in child undernutrition (i.e., stunting) over the past few decades, it remains a major concern in Nepal, with 25% of children under the age of five experiencing chronic undernourishment. There is considerable scope for improving nutrition-related behaviors to address this ongoing issue. In Nepal, knowledge regarding appropriate child feeding practices is often inadequate, and thus additional sources of accurate information are required. Information through multiple sources (i.e., interpersonal communication, mass media, and mobile SMS) provides opportunity to reach households who inadequately practice childcare. Information improves knowledge and information exchange (i.e., receiving or sharing) usually …

Intention Or Perception? Signaling Theory In The Online World, Mohona Mandal

Theses and Dissertations

Backlash on social media in response to online behaviors is swift and often decisive with significant consequences. One possible reason for this is that online actions are perceived as reflective of a person’s true self. Signaling theory provides support for this argument and suggests that people intentionally display information about themselves to communicate their beliefs to others. While existing work suggests that social media posts are intentional, social media interactions such as likes, comments, and reposts might also function similarly (i.e., as a signal of beliefs). Two studies were conducted to explore whether interacting with online content is perceived as …

Leveraging The Usage Of Blockchain Towards Trust-Dominated Manufacturing Systems, Philip Joseph Samaha

Theses and Dissertations

Smart Manufacturing has elevated manufacturing processes, transitioning from automated systems to autonomous ones. This evolution has heightened the significance of data within manufacturing facilities. The role of data has evolved from solely monitoring processes to both monitoring and extracting insights from these processes, facilitating precise control. In this context, the data infrastructure plays a critical role, encompassing both internal data circulating within the facility—such as information exchanged between controllers and actuators—and external data transmitted to and from outside entities. When the factory's cyber infrastructure is connected to the internet, security concerns escalate significantly, amplifying associated risks. Therefore, the integration of …

Mechanics Based Characterization Of Elastic Metamaterials, Mamdudur Rahman

Theses and Dissertations

In bandgap engineering there is a shortage of systematic design approach which enables one to select design variables to achieve bandgap in desired frequency range. Tools that can address this can open new areas of interest, especially since phononic crystals with low frequency bandgaps have multitude of applications in attenuation of structural vibration. Furthermore, mechanics-based characterization of phononic crystals had not seen much progress in the recent years while a lot of applied research had been conducted on phononic materials with material phase periodicity and other factors taken into consideration. This work aims to propose a systematic characterization approach of …

Perception Of Recreational Water Quality In The Scholarly Literature: Where Have We Been & Where Should We Go, Xavier Alberto Basurto Cendeno

Theses and Dissertations

This study explores existing literature and research themes between water quality and recreational participation through use of a bibliometric analysis with content analysis. It identifies key researchers, institutions, and themes that have shaped the field. Despite the growing body of research, gaps remain in understanding the state of the research on this important topic. By analyzing trends and how these trends have changed over time, this study aims to offer insights for future research agendas. Ultimately, the findings will inform strategies for improving water quality management and fostering more resilient, timely water-based recreational research.

Rational Catalyst Synthesis For Sustainable Energy Applications, Alaba Upe Ojo

Theses and Dissertations

Energy accounts for two-thirds of the global climate challenges. Effective utilization of green hydrogen or finding cleaner ways to improve energy generation is necessary to combat climate crisis and allow for a more sustainable future. This work evaluates three heterogeneous catalytic processes which contribute to a sustainable future. In chapter 2, we studied the hydrogenation of toluene to methylcyclohexane; a reaction that can potentially serve as a medium for hydrogen storage and help to overcome the safety challenges of transporting gaseous hydrogen. We found that palladium catalysts on certain carbons exhibited significantly enhanced toluene hydrogenation rates compared to activated carbons …

Securing Memorization In Piano Performance With Continuous Audiation, Jie He

Theses and Dissertations

The study explores how incorporating continuous audiation, a concept introduced by pianist and educator Sarah Croom-Hatch, can be used as a strategy to improve pianists’ music memorization abilities and relief performance-related stress. The study presents a four-stage memorization process that emphasizes preparation, early, middle, and late stages. By integrating aural, kinesthetic, analytical, and visual memory with continuous audiation during the four-stage memorization process, pianists can develop a cohesive and secure “sound stream” that significantly enhances their memory system. The study provides practical guidance for systematically developing continuous audiation within daily practice routines to enhance memorization skills and achieve successful piano …

Redefining Gas Turbine Engine Development: A Digital Twin Framework Informed By Operational Dynamics And Numerical Analysis, Sowmya Raghu

Theses and Dissertations

Gas Turbine Engines (GTEs) serve as primary propulsion systems in aviation and are key for power generation units in various industrial applications. The conventional Gas Turbine Engine Development and Monitoring Lifecycle (EDML) typically encompasses six stages: preliminary design, numerical analysis, prototyping and testing, manufacturing, systems integration, and subsequent systematic monitoring processes. This dissertation redefines the gas turbine engine design and development process by synergistically integrating design capabilities, real-time operational data, and predictive maintenance through the implementation of digital twins. The primary objective is to establish a comprehensive framework for gas turbine engine design by utilizing thermodynamic and aerodynamic modeling, supported …

Systemic Inflammation And Neurocognitive Deficits In School-Age Children With Sickle Cell Disease., Elizabeth A. Gillooly

Theses and Dissertations

Sickle cell disease (SCD) causes inflammation that contributes to poor clinical outcomes, including cerebrovascular disease (CVD). CVD can take several forms in SCD, including neurocognitive deficits without visible cerebral infarction. The role of chronic inflammation in cognitive development in SCD has received little attention to-date. We aimed to study novel markers of systemic inflammation: neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and the systemic inflammation index (SII) to describe developmental trends and relationships to cognitive outcomes in SCD at early elementary school-age. Sixty-one children with SCD and no history of stroke were identified who completed an early elementary school age cognitive …

The Role Of The Physical Therapist In Managing Type 2 Diabetes: Systematic And Qualitative Perspectives, Garrett Matthew Hainline

Theses and Dissertations

Introduction: Physical activity (PA) is an effective tool in the management of Type 2 Diabetes (T2D). PA recommendations for people with T2D are to achieve at least 150 minutes per week of moderate intensity PA. This assists to maintain blood glucose control and reduce cardiovascular disease risk factors. Unfortunately, people with T2D are less likely than their normoglycemic peers to meet PA recommendations.

Veterans of the armed forces experience T2D at even greater levels than the general population, with prevalence at about 20%. In addition, T2D and pre-diabetes are elevated among younger veterans, including those of recent conflicts. Reducing rates …

Thermal Management Of Power Electronic Devices Using Single Crystal Aln Heat Spreaders, Md Abdullah-Al Mamun

Theses and Dissertations

Due to high critical electric field and saturation velocity, wide bandgap (WBG) III-Nitride semiconductor materials (AlxGa1-xN) and their heterostructures have gone through extensive research in academia and industry for applications requiring high-voltage, high-current, high-frequency, and high-temperature transistor operation. AlGaN/GaN high electron mobility transistor (HEMT) has been commercialized for 650-V power converters, smartphones, PCs, USB wall power outlets, on-board and off-board EV chargers, and numerous other applications. However, AlGaN/GaN HEMTs grown on low-cost sapphire or Si substrates face significant self-heating issues due to the poor thermal conductivity of the substrate. The high thermal resistance (RTH) and heat capacity of the substrates …

Tracking Deposition And Settling Characteristics Of Airborne Metallic Particulate, William Kahale Caspino

Theses and Dissertations

Transport and deposition of metal particles is a source of environmental and public health concern. Understanding how ambient conditions and the properties of the particles interact to influence the dispersal range can provide information on and the possible extent of environmental contamination. Controlled laboratory experiments and modeling were utilized to determine when such particles would deposit. Particle samples containing heavy metals, a Palladium-dominant alloy and a Nickel/Aluminum dominant alloy LANA, were released in a static column, and the vertical displacement was tracked utilizing a Phantom v7.3 camera and a camera lens. Electron microscopy revealed that particles are not spherical and …

Vascular Calcification In A Mouse Model Of Chronic Kidney Disease And In Human Peripheral Arterial Disease, Breanna Pederson

Theses and Dissertations

Vascular calcification is a process in which calcium and phosphate crystallize to form hydroxyapatite in the extracellular matrix of blood vessels. There are two forms of arterial calcification: intimal and medial, which occur via different etiologies. Intimal calcification is associated with atherosclerosis and occurs in the layer of endothelial cells adjacent to the artery lumen. Medial arterial calcification (MAC) is independent of atherosclerosis and occurs in the middle, muscular layer of the artery. MAC is strongly associated with aging, diabetes mellitus, and chronic kidney disease (CKD). MAC is frequently in patients with peripheral arterial disease (PAD). Most studies to date …

“They’Re Just Kinda Fun”: Action Research Evaluating The Impact Of Gamification Tools On Secondary Social Studies Students’ Academic Self-Efficacy, Motivation, And Perceptions Of Learning, Anthony Wayne Blair Jr.

Theses and Dissertations

This action research study evaluated the implementation of a gamification strategy to improve academic self-efficacy and motivation in social studies students at Azul Mountain High School (a pseudonym). Keeping students engaged in school is a top priority for educators at all levels. However, students’ lack of engagement at the high-school level has become more detrimental. Improving self-efficacy has been linked to increased motivation, academic achievement, and improved learning outcomes. By making the learning experience more engaging for students, gamification may be a viable approach to the challenge of keeping students in high school. This study addressed three research questions: (a) …

“We Don’T Know What We Don’T Know”: Improving The Quality Of Stem Teaching In A British International School By Developing Teachers’ Stem Pedagogical Knowledge And Stem Instructional Practices, Matthew James Fagg

Theses and Dissertations

This research aimed at improving the quality of science, technology, engineering, and mathematics (STEM) teaching at a British international school in Brunei Darussalam. Evidence from a range of sources suggested that teachers at the school were not employing common STEM instructional practices when giving their pupils STEM problems to solve. The purpose of the two research questions was to identify how STEM lessons were being taught in Grades 2 to 7 in the school, and to measure the influence of STEM-related professional development sessions on teachers’ STEM pedagogical knowledge and STEM instructional practices. The researcher followed an eight-stage action-research cycle …

A Flipped Classroom Approach For Algebra 2 Students Who Have Struggled In Previous Mathematics Courses, Abby Suss

Theses and Dissertations

This mixed method study examined the effect of a flipped classroom approach on the engagement and attitude of Algebra 2 students who had struggled in previous mathematics classes. Videos for students to watch at home were constructed with adherence to the Cognitive Theory of Multimedia. Class time then focused on students working together and with teacher support in accordance with active learning theory. Qualitative sources of data - pre and post intervention interviews, pre and post student questionnaires, and teacher anecdotal notes and quantitative sources of data - the SEMs and the ATMI - were gathered and analyzed. Results showed …

Ashs To As: Evaluating The Effectiveness Of Mandatory Athletic Study Hall In Improving High School Athletes’ Academics, Angela Pilson

Theses and Dissertations

During the 2023-2024 academic year, this action research study was conducted at local, mid-sized high school in South Carolina using a mixed-methods approach to evaluate the efficacy and impact of a mandatory athletic study hall (ASH) program on high school athletes’ academic performance. Through this program, during each academic quarter, any in-season athletes with any grades below 69% to either attend after-school study hall sessions or complete tutoring. The study both reviewed the academic performance of athletes and nonathletes and collected qualitative data from stakeholder surveys completed by nonathletes, athletes, teachers, coaches, and parents. The findings revealed a significant difference …

Beyond Narrow Views On First-Grade Reading Instruction In Saudi Arabia: Insights From First-Grade Saudi Reading Teachers, Ali Alzughaibi

Theses and Dissertations

Recent development in reading research and instruction has highlighted the need to unpack certain claims about how children learn to read and how reading is taught. These claims where challenged by different scholars in the field, pointing to the complexity of reading. Much of this research, however, was done where English is taught as a first language (e.g., United States, UK). Lacking supporting evidence, a review of the literature on early Arabic reading instruction in Saudi Arabia has highlighted different claims about how Arabic early reading is taught and what teachers know about early reading. For example, teaching Arabic early …

Empowering Science Educators: A Study Of Self-Efficacy, Phenomenon-Based Instruction, And Community Of Practice In Arabic Language Classrooms., Rolla Elsaiary

Theses and Dissertations

In the dynamic realm of science education, a crucial demand exists for customized teacher professional development (PD) initiatives that address diversity and the Next Generation Science Standards (NGSS). These programs should be designed to accommodate varied student demographics, explicitly addressing the needs of those engaging with science education in less commonly taught languages (LCTLs), such as Arabic. Four fundamental questions guide this research. First, it should assess teachers' self-efficacy in teaching science in the context of Arabic instruction. Secondly, it needs to explore the impact of phenomenon-based instruction (PBI) on elevating teachers' self-efficacy in delivering science education in Arabic. Thirdly, …

Exploring Culturally Relevant School Leadership Practices: An Autoethnographic Study, Kezia Myers

Theses and Dissertations

The focus of this autoethnographic study was on the implementation and impact of Culturally Responsive School Leadership (CRSL) within an elementary school. The school is comprised of approximately 400 P-5 students, with a predominantly Black student body (77%), along with students who identify as Hispanic, multiracial, White, and other ethnic backgrounds.

Three research questions were posed: 1) In what ways have I, as a school principal, integrated culturally relevant leadership practices into the decision-making framework at the school? 2) How might what I learn about other principals’ implementation of CRP in their respective schools inform my understanding of its effectiveness …

From Colonial Frontier To A Slave Society: "Second Slavery" And The Former Backcountry Of South Carolina In The Early Republic, 1780-1833, Elisabeth Zoe Horecny

Theses and Dissertations

Although the South Carolina backcountry was labeled pre-modern by contemporaries and, later, by some historians, it was the model of a modern, “second slavery” in the Atlantic World as evidenced by cultural, economic, and political changes there to accommodate and promote the expansion of slavery. The former backcountry was exemplarily of “second slavery” because the region modernized to create a slave society, instead of modifying the existing colonial system of mass enslavement in the region. Enslaved people responded to these changes in the former backcountry by spreading their oral traditions in healing and religion, maintaining African traditions, and creating communities …

If We Only Had A Wheelbarrow: Asset-Based Pedagogy In The Elementary Classroom, Elizabeth Bedell

Theses and Dissertations

The challenges facing today’s educators are much and many. Among them ranks the persistent underachievement of students from racially and culturally diverse backgrounds. Attempts to remedy this have historically taken a deficit approach, one that attempts to “fix” students by melding them to the norms of the dominant culture, ultimately diminishing their cultural ways of knowing and being and perpetuating inequity. Although educators want to do better, most have simply not been provided with the professional learning that would support their centering students’ voices and experiences as essential to learning

With a focus on asset-based pedagogy, this convergent mixed methods …

Impact Of A Mathematics Review On Students' Chemistry Self-Efficacy And Problem-Solving Skills In An Undergraduate Chemistry Course, Antoinette Marie Gayle

Theses and Dissertations

Mathematics is an integral part of chemistry courses, and the application of arithmetic and algebraic knowledge is important for solving calculation-based problems in undergraduate general chemistry. Students begin undergraduate chemistry with varying levels of mathematics skills and experience which may impact their ability to solve problems and understand the content in chemistry courses. Utilizing a convergent mixed methodology, this action research study evaluated the impact of an in-class mathematics review intervention on students’ chemistry self-efficacy and problem-solving abilities in general chemistry. Mathematics review sessions were conducted in undergraduate general chemistry classes with 40 first-year students at a small university college …

Incorporating Digital Tools In A Social Studies Course: An Action Research To Support High School Students’ Critical Thinking And Collaboration Skills, Tara Grant

Theses and Dissertations

Digital tools have the potential and ability to develop and support critical thinking skills in high school students, as they provide interactive and engaging platforms for learning. The purpose of this action research was to implement digital tools for student collaboration in two high school Social Studies classrooms, to evaluate the tools’ potential impact on students' critical thinking skills, and to assess the participant’s perceptions of the impact and use of digital tools for collaboration in the classroom. This study focused on two overarching questions: (1) How, and to what extent, does the use of digital tools for student collaboration …

Increasing Engagement And Self-Efficacy Levels In Underachieving 5Th Grade Students: A Qualitative Study, Raney Altman

Theses and Dissertations

Student achievement and mastery of content taught in reading is measured each year in the state of South Carolina. A pattern of low achievement was identified, but more specifically, there were patterns of low engagement and self-efficacy levels in 5th grade students in this study. Because reading is a critical tool needed to participate in all life necessities such as finding work and experiencing interviews, paying bills, and following simple everyday directions, it was evident in student behavior in the classroom that adjustments needed to be made instructionally to ensure success for all students in school and in future endeavors. …

Music Production And Girls: A Phenomenological Study Of The High School Music Technology Classroom, Mary Angel Cleary

Theses and Dissertations

Female representation in public spheres and organizations is a continuing topic in American research. Females have historically been left out of all aspects of computer technology and the technical sides of the music industry. In upper echelons of music making, from composition to production, they remain vastly under-represented. People begin forming ideas about who they are, their abilities, and their future career interests in high school, especially in elective courses like music technology that are geared towards allowing students to explore their creative skill sets to determine if these elective experiences are something for which they have a life-long passion. …

Keep Your Friends Close And Your Enemies Closer A Theory Of Welfare Provision In Authoritarian Regimes, Sanghoon Park

Theses and Dissertations

The dissertation examines the determinants and dynamics of welfare provision in authoritarian regimes and the influence of welfare provision on autocrat’s survival. It argues that the social and class-based explanations for welfare in democracies can also apply to autocracies, though the specific challenges faced by autocrats can lead to different outcomes.