Digital Commons Network^™

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 …

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 …

Regulation And Function Of The Rna-Binding Protein Khsrp During Neuronal Development, Regeneration And Axonal Injury Response, Courtney Nicole Buchanan

Theses and Dissertations

Axons, which extend long distances from neuronal cell bodies, rely on localized mRNA translation to swiftly respond to extracellular stimuli and physiological states. This work investigates the mechanism underlying the RNA-binding protein KHSRP’s, axonal mRNA translation and regulatory pathways involved in neuronal growth and regeneration. Our results indicate that KHSRP deletion in mice leads to upregulation of growth-associated mRNAs linked to neuronal morphology and function, resulting in increased axon growth and altered memory consolidation. Indicating a critical role for KHSRP in neuronal development and function through post-transcriptional regulation (Chapter 2). Additionally, we show there is a rapid increase in axonal …

The Effects Of Guided Induction Completed Individually And In Groups On The Development Of Negation In Palestinian Arabic An Analysis Of Accuracy, Processing, And Rule Structure, Hana Baalousha

Theses and Dissertations

The effectiveness of different instructional interventions and the various ways such interventions promote L2 learning and processing has been the topic of recent research in the subfield of Instructed Second Language Acquisition (ISLA). Previous research on the effects of guided inductive instruction (GI) in the second language classroom has left various lacunae to be addressed, such as the effect(s) of linguistic complexity, proficiency level, modality of instruction, and the target language (Ranta, 2022). A plethora of studies in the current literature compares the efficacy of GI to deductive instruction as students work individually in computer-assisted language learning contexts (CALL) revealing …

Temporal Forecasting Of High-Rate Dynamic Using Physics-Informed Machine Learning And Hardware-Software Co-Design, Puja Chowdhury

Theses and Dissertations

Due to aging, fatigue, corrosion, and even natural disasters; the health of the structure is prone to degradation throughout its service life. The explosively-fast growing efforts on Structural health monitoring (SHM) always try to exploit different aspects of the automation of damage detection, localization, and prognosis tasks. One of the main challenges is the hardware and software co-design to implement the model in real-life situations. On the other hand, the fast-advancing artificial intelligence draws the researchers' attention to adopt different data-driven approaches in this field. This brings other challenges like domain-specific model adaptation, data bias, data scarcity, model validation by …

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 …

Using Machine Learning And Deep Learning Algorithms To Improve Low Birthweight Prediction, Yang Ren

Theses and Dissertations

Low birthweight (LBW) is a major public health issue resulting in increased neonatal mortality and long-term health complications. Traditional LBW analysis methods, focusing on incidence rates and risk factors through statistical models, often struggle with complex unseen data, and thus, their effectiveness is limited in early prevention of LBW, requiring more advanced LBW prediction models. Therefore, this dissertation delves into this important research area by proposing and examining novel machine learning (ML) and deep learning (DL) algorithms, aiming to predict LBW more accurately during the early stage of pregnancy. This dissertation consists of three studies, strategically designed to build upon …

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 …

A Low Density Tracker For The Dune Nd Complex., Nibir Talukdar

Theses and Dissertations

The Deep Underground Neutrino Experiment (DUNE) is a next-generation long- baseline neutrino experiment aimed at resolving mass hierarchy and the CP violation puzzle in the neutrino sector. Although neutrinos are the most abundant particles in the universe, their study is challenging due to their extremely low interaction cross sections. DUNE aims to overcome these challenges by sending a beam of muon (anti)neutrinos from Fermilab, located near Chicago, to the Sanford Underground Research Facility (SURF) in South Dakota.

The experiment consists of a near detector (ND) complex at Fermilab, which mea- sures the composition of the unoscillated neutrino beam, and a …

Assessing The Accuracy, Validity, And Application Of A New Method For Sex Estimation Using Isotopic Ratios Of Fe, Cu, And Zn In Human Bone, Elizabeth Anne Wakefield

Theses and Dissertations

This dissertation evaluates the accuracy, validity, and application of a novel sex determination method based on isotopic variations in copper (Cu) and iron (Fe) within human bone, initially developed by Jaouen et al. (2012). The primary aim of this research was to test the reproducibility of the method, expand the sample to include a broader age range and ethnically diverse groups, and assess its applicability in forensic contexts using contemporary skeletal samples. Bone samples were collected from 60 individuals across two curated skeletal collections: the George S. Huntington Skeletal Collection and the Texas State Forensic Anthropology Donated Skeletal Collection. The …

Bridging Disciplinary Boundaries: A Study On The Integration Of Social Studies Within Elementary Ela Education, Jill Knight

Theses and Dissertations

This qualitative action research study investigates the integration of social studies within English Language Arts (ELA) education, highlighting the challenges educators face in balancing curriculum demands amid increasing literacy and math instruction pressures. With over 20 years of experience teaching high school history, the researcher identified a concerning decline in social studies education at the elementary level, a situation worsened by legislative measures such as No Child Left Behind (NCLB) and the Every Student Succeeds Act (ESSA), which prioritize tested subjects. The primary aim of this study was to collaborate with elementary teachers to explore their perceptions and experiences related …

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 …

Creating A Quality Feedback System Between School Administrators And Teachers, Gerald Keith Price

Theses and Dissertations

After moving to a new school district as superintendent, I recognized early on that student achievement was low and intentional work needed to be done to bring about academic improvement. As the district leadership team began to explore causes and discuss possible solutions, we decided we needed to focus on changing the perception around instructional leadership. School administrators are much more likely to have mutual dialogue with their teachers when they assume the role of a coach rather than a superior. With open lines of communication, teachers and administrators are able to discuss ways to maximize learning time with students …

Does Digital Deepen Discourse? A Case Study Of How Middle School Teachers Use Eureka Math2 To Promote High-Quality Mathematics Classroom Discussions, Michael Wilson Street

Theses and Dissertations

The purpose of this research was to evaluate how teachers use Eureka Math² (EM²) curriculum and technology tools to promote high-quality mathematics classroom discussions. Research has indicated these discussions improve students’ mathematical knowledge, reasoning, and conceptual understanding. However, orchestrating these discussions is challenging, requiring adaptive thinking, deep content knowledge, and an unfamiliar facilitation role; implementing technology presents an additional challenge. This study was guided by three research questions. First, how and to what extent do teachers use EM² curriculum and technology tools to promote high-quality mathematics classroom discussions? Second, what are the perceptions of teachers about …

Engaging Students In The Scientific Process: An Examination Of Active Learning Strategies In Introductory Geoscience Labs, Meryssa Piper

Theses and Dissertations

High-quality instruction of introductory geoscience courses entices students to major in geoscience fields and ensures undergraduate students have opportunities to learn and apply scientific information and practices. Prior studies indicate that active learning strategies in higher education settings can increase student knowledge and interest. This dissertation explores the integration of two active learning strategies in introductory geoscience laboratory courses: inquiry and gamification The first study housed in Chapter 2 investigates the level of inquiry used in introductory geoscience lab activities across the United States. Through a comprehensive analysis of these activities, this chapter assesses: (1) the degree to which instructor …

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 …

Inspecting The Foundations Of Natural Law Ethics And Politics: Looking For Cracks, Detecting Gaps, And Considering The Edifice That Can Be Built Thereon, Adam D. Bailey

Theses and Dissertations

In this dissertation I inspect the foundations of natural law ethics and politics. The inspection involves looking for cracks, detecting gaps, and considering the edifice that can be built thereon. To do so, I critically examine several of the many concepts and principles that are constitutive of those foundations. Some of my examination is done by means of direct consideration of such concepts and principles. And some of it is done by addressing such concepts and principles indirectly as I address questions about practical ethical or political concerns including: how can public officials make decisions that are not biased, what …

Investigating Student Engagement Through The Implementation Of A Performance Task In Secondary Mathematics: A Mixed Methods Action Research Study, Sulema Wright

Theses and Dissertations

Through teaching experiences in the math classroom, students voiced that solving mathematical problems did not benefit them in the real-world. This study discussed the use of a performance task in a high school geometry class as a way to engage students, increase their confidence when solving math problems, and determine the impact they have on engagement compared to supportive assignments. Students' perspectives were used as one measure in determining engagement, alongside, my perspective of using a tally table. Through the use of a performance task that connected to the life experiences, students’ perspectives proved that implementation increased their engagement in …

Leveling Up The Power Of Voice: The Impact Of Gamification On Speaking Participation Of Multilingual Learners In The Cybersecurity Classroom, Philip Peavy

Theses and Dissertations

The United States has a growing number of multilingual learners in its classrooms, but many schools are not prepared to support these students, especially in computer science education. There is a shortage of qualified teachers and few resources available in languages other than English. As a result, many multilingual learners are not actively participating in their computer science classes. This is a problem because computer science is a growing field with many opportunities for employment. One way to support multilingual learners in computer science education is through gamification. Gamification is the use of game-design elements and principles in non-game contexts. …

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.

Nonlinear Optical Studies Of Complex Materials, Govinda Kharal

Theses and Dissertations

This dissertation presents an in-depth exploration of nonlinear optical investigations into complex material systems, employing second harmonic generation (SHG) and complementary bulk measurement techniques. The first project focuses on surface symmetries and phase transitions in IrTe2. Using SHG and electrical resistance measurements, we systematically investigate temperature-induced symmetry changes and reveal significant shifts in transition temperatures due to thermal cycling. Comparison with bulk X-ray diffraction confirms that these shifts are surface-related, providing a new interpretation of inconsistencies in reported transition temperatures. Our findings emphasize the effectiveness of SHG in capturing subtle surface phenomena, with future directions involving straincontrolled studies to manipulate …

Popular Justice Or Populist Justice? Penal Populism And Its Impact On Democracy, Kuan-Wu Chen

Theses and Dissertations

Populism, a pervasive phenomenon in contemporary politics, manifests as an anti-establishment, anti-pluralistic, morally charged framing that advocates for direct rule between leader and populace. Among its variants, penal populism emerges as a particularly concerning manifestation. It is characterized by a leader's deployment of panicking, punitive, and politically targeted rhetoric to enhance social control and accrue political capital rather than address crime prevention. This research argues that penal populism poses the most significant threat to democratic rule, as evidenced by theoretical, framing, and mobilization analyses. A novel categorization of populist variants is proposed based on dimensions of social categorization and exclusivity. …

Teacher Perception Of International Baccalaureate Middle Years Programme Implementation, Lorene Michelle Lloyd-Peay

Theses and Dissertations

The rural, Title I, underperforming, priority schools in the study encounter several challenges when implementing the International Baccalaureate Middle Years Program (IBMYP) framework. Successful implementation is contingent on how the teachers perceive these challenges. This research aims to understand how teachers' perspective on the IBMYP affects programme implementation. Understanding the experiences and perspectives of teachers increased my and the school district’s ability to support the effective implementation of the IBMYP framework. The research questions focused on gathering data to determine teacher perspectives about the IBMYP, how those perspectives affect programme implementation, and the factors that appear to enhance or impede …

The Fifth Element In Three Dimensions: Boron Systematics Along And Across The Aleutian Volcanic Arc, Owen Jensen

Theses and Dissertations

This study uses abundances and isotope ratios of the fluid-mobile element boron (B) to better understand the role of fluids in volcanism at the Aleutian arc in Alaska. In volcanic rocks from the Aleutian volcanic front, patterns in B abundance and isotope ratios (δ11B) point to three endmembers: a sediment melt, a slab interior melt, and a slab-top melt. Most lavas from the eastern Aleutian Islands have δ11B of -2 to +5‰, similar to Aleutian sediment. Hence, sediment is likely to be the dominant B source in the Aleutian Island samples. In lavas from the western Aleutian seafloor, high δ11B …

Topics In Beyond The Standard Model Physics, Sapan Karki

Theses and Dissertations

Standard Model and General relativity are two pillars of modern physics, and their reconciliation would bring a long-sought harmony in physics along with insights into the secrets of the universe. It is then natural to try and modify these theories by searching for the fundamental symmetry describing our world. In this work, I work on the implication of breaking of Lorentz symmetry and the existence of topological objects called solitons. In chapter 3, I show how a cosmologically generated Lorentz- Violating model has instability issues. I then show how the quantum corrections on Lorentz-Violating models can produce ambiguity in β-function …

Why He Sings: An Action Research Study Using Counternarratives To Affect The Deficit Narratives Attributed To Students Of Color, Tiffany Jones Early

Theses and Dissertations

There is ample research that shows that students of color are less likely to graduate from college than their White peers. Meanwhile, the demographics of students who enroll in college continue to be more diverse than previous generations. As universities struggle to understand retention disparities, the voices of the students are often eliminated from the discussion. Many university staff members, instead, opt for a deficit narrative to blame what they believe students of color lack that inhibits them from persisting in college until graduation. The purpose of this study is to use narrative inquiry to better understand the educational experiences …

Comparing Likert And Slider Response Formats In Clinical Assessment, Guyin Zhang

Theses and Dissertations

This study used a within-subjects experimental design to compare various response formats in fitting confirmatory factor analysis (CFA) models. Participants responded to the 8-item Center for Epidemiologic Studies Depression Scale (CES-D) across four different response formats: the Likert-type scale, three types of slider response formats, and a number-entry response format. We conducted the comparison of different response formats based on item-level scores, factor structure and psychometric properties of the scale, mean comparisons across groups, and individuals’ sum scores. Similar results were observed across the different response formats with respect to factor structure, reliability, and validity of test scores. However, inconsistent …

Electroless Deposition And Galvanic Displacement For The Control Of Supported Nanoparticle Size And Composition, Haiying Zhou

Theses and Dissertations

Catalyst performances can be greatly affected by properties such as particle size, composition, geometry, and cleanliness of the active surface. To achieve optimal catalytic performance, appropriate synthesis methods are required to synthesize the desired structures. Supported metal particle catalysts are usually prepared by impregnation and precipitation methods in industry. Although these two methods are simple, they exhibit poor control over surface morphology, leading to a wide particle size distribution and uncontrolled distribution of different metal components. In this dissertation, three topics on controlling surface morphology are discussed.

For structure sensitive reactions, reactivity and selectivity can be strongly affected by particle …

Measurement Of Single Differential Cross Sections, Polarization Observables, And Beam-Spin Asymmetry In Charged Two-Pion Electroproduction Off The Proton, Christopher Andrew Mclauchlin

Theses and Dissertations

Emergent phenomena are described as such due to functional differences in paradigms based on observation scale, one of the most fundamental being the emergence of hadronic structure from bare quarks and gluons, as dictated by the strong interaction. Measurement of charged two-pion electroproduction off the proton with CLAS in run group E1-6 and the extraction of single differential cross sections, polarization observables, and beam-spin asymmetries was performed as a necessary step in illuminating the length scale currently dark to Quantum Chromodynamics within the structure of the proton. Understanding the scale-dependent nature of this hadronic structure is integral to understanding nature …