Digital Commons Network^™

Thermo-Structural Analysis Of Stiffened Fgm Panels With Cutout Under Non Uniform And Localized In-Plane Edge Loadings, Balaraman P

Theses and Dissertations

Most aerospace applications involve structural components with a high stiffness-toweight ratio and excellent resistance to high temperatures. Buckling, vibration as well as other forms of instability are the consequences of a non uniform stress field caused by non uniform, localized edge loadings and the presence of discontinuities. In order to improve structural properties and increase load bearing capacity, designers concentrate on structural integrity, especially in high-temperature applications. The adaptability and customizable nature of functionally graded material (FGM) make it valuable in addressing these challenges.

Metal-ceramic FGM is an advanced composite material that integrates the distinctive qualities of metal and ceramic …

Synergistic Approaches For Microstructural Refinement, Enhanced Mechanical And Wear Behaviour In Additively Manufactured 17-4 Ph Stainless Steel, Pradeep Kumar S

Theses and Dissertations

The surface and microstructural characteristics of additively manufactured parts play a significant role under mechanical loading. Due to its high strength, tailorable mechanical properties by heat treatment, and ease of printability, the 17-4 precipitation hardened (PH) stainless steel is gaining attention in the additive manufacturing (AM) field.

Selective Laser Melting (SLM), one of the laser-based powder bed fusion (L-PBF) processes, is capable of making fully dense metallic parts with high geometrical fidelity and greater design flexibility at high resolution. The main factors limiting the adoption of SLM are poor surface roughness, anisotropic microstructure, and the formation of micro-pores in the …

Development Of Brain Tumor Detection And Feature Extraction Through Deep Learning Approach, Sivapathi A

Theses and Dissertations

As the body's central control system, the human brain is susceptible to a wide variety of disorders, including tumors characterized by abnormal cell growth. It is imperative to detect these tumors as early as possible to plan effective treatment and improve patient outcomes. By using contemporary medical imaging methods, this research seeks to improve the accuracy and efficiency of brain tumor detection through the careful preprocessing and analysis of images, particularly Magnetic Resonance Imaging (MRI) [1]. To provide context for the subsequent research efforts, the challenges inherent in brain tumor detection are discussed comprehensively, including segmentation accuracy, small lesion detection, …

Evaluation Of Bridge Deterioration Factors: From Design Parameters To Community Impact., Lawrencia Akuffo

Theses and Dissertations

The structural health and economic variables influencing the state of bridges in New Jersey are thoroughly examined in this thesis. The predictive modeling of bridge conditions using stepwise selection and linear logistic regression approaches is the primary focus of the opening chapter. With its precise predictions about bridge condition, either being fair/good, our model offers insightful information about resource allocation and maintenance by identifying bridge features which affect the deterioration of bridges the most. This gives effective infrastructure management, which not only relies on the identification of the important predictors and their effects on bridge conditions but also ranks them …

A Comprehensive Ml And Ai Framework For Intersection Safety: Assessing Contributing Factors, Surrogate Safety Measures, Non-Compliance Behaviors, And Cost-Inclusive Methodology, Deep Patel

Theses and Dissertations

Intersection safety, particularly in traffic management, has emerged as a pressing concern due to its substantial contribution to road crashes and fatalities. In recent years, understanding road users' behavior and conflicts at intersections has become essential for evaluating traffic safety. According to the Federal Highway Administration (FHWA), in 2020, over 50% of fatal and injury crashes occurred at or near intersections, necessitating further investigation. This study addresses this issue through an innovative blend of comprehensive literature review, advanced machine learning algorithms, artificial intelligence (AI) technologies, surrogate safety measures (SSMs), non-compliance behavior, and emphasizing the economic aspects of traffic incidents. First, …

Understanding Patterns Of Hope And Sense Of Belonging From Mentoring Through Latent Class Analysis, Bailey Dow

Theses and Dissertations

Youth who have safe, stable, nurturing relationships (SSNRs) are more resilient to adverse childhood experiences and have better mental health. Compared to prior generations, today’s youth feel lonelier and more socially isolated than ever, and they crave the sense of belonging and hope that comes from meaningful social connections. Mentors can play a crucial role in bolstering these attributes. Mentors help youth in different ways, depending on the mentee's characteristics, preferences, or circumstances. Despite the well-known significance of natural mentoring relationships as a SSNR, researchers have paid little attention to how and why natural mentoring benefits vary among mentees. The …

Does Sport Participation Affect Physical Activity, Perceptions Of Exercise, And Physical Distress Tolerance In Adolescents?, Monica Carolina Martinez

Theses and Dissertations

Background: Today's adolescents are not attaining recommended duration of physical activity (PA), which can impact their physical and mental health. Sport participation may be an avenue to increase PA as well as improve positive perceptions of exercise and distress tolerance during PA. We investigated whether sport participation among adolescents influences their overall PA levels as well as PA covariates. We also evaluated the impact of the number of sports an individual participates in on their positive perceptions of PA. Methods: PA data was recorded using the Physical Activity Questionnaire for Adolescents (PAQ-A) and a waist-worn accelerometer. Participants also completed the …

Improving Collaborative Lesson Planning By Implementing Design Thinking In A Professional Learning Community, Kelli Jo Bellant

Theses and Dissertations

This research analyzes the effects of incorporating design thinking processes in implementing Professional Learning Communities (PLCs) towards collective lesson planning practices among elementary teachers. This study occurred at Forest Creek Elementary School (FCES), indicating a need to improve collaborative lesson planning. The study sought to determine how using a design thinking protocol in a PLC impacted teachers' views about collaborative lesson planning and whether participating in a PLC to co-create lesson plans impacted teachers' views of efficacy. The framework of the study was based on the social constructivism perspective and the design thinking model. This action research was conducted with …

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 …

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 …

Hyo-Shin Na's Chamber Works, 'From Korea To America- 120 Years And Beyond' And 'Song Of The Fog': A Stylistic Analysis And Performance Guide, Jiyeon Lee

Theses and Dissertations

This study analyzes two chamber music works by Korean composer Hyo-shin Na, Song of the Fog and From Korea to America, focusing on how the fusion of Eastern and Western instruments contributes to musical expression and timbral characteristics. It includes an examination of the role of instrumental arrangement and reveals the composer's narrative and emotional intentions. The aim is to present an insight into Hyo-shin Na’s ensemble style.

Song of the Fog uses the Japanese koto with Western chamber instruments to depict the imagery of the accompanying poetry through changes in timbre, dynamic contrasts, and various performance techniques. Despite …

Integrating Digital Twin Technology For Real Time Blockage Detection In Water Cooled Electronics, Richard Scott Hainey Jr.

Theses and Dissertations

This paper presents a culmination of research into integrating Digital Twin (DT) technology in water-cooled electronic systems to improve system reliability by detecting faults in the cooling system that maintains the proper operation of heat-producing electronic components and systems. A DT is a virtual representation of a physical twin (PT). This PT can represent real-world systems, individual components, or processes. Using the DT, operators can gain insight into the behavior and characteristics of the PT, thereby facilitating informed decisions to improve its health and optimize processes. The DT system is designed to detect obstructions forming in the waste heat-producing components …

Investigation And Comparative Analysis Of Onset Of Nucleate Boiling (Onb) In A Narrow Rectangular Channel In Microgravity And Earth Gravity Environments, Fahim Foysal

Theses and Dissertations

Understanding the onset of nucleate boiling (ONB) in different gravitational environments is crucial for a wide variety of industrial and space applications of flow boiling systems for thermal management. This thesis provides a comparative analysis of ONB in both microgravity (µg) and Earth gravity (1g) environments, with the aim of identifying the key differences. NASA’s experimental facility called Flow Boiling and Condensation Experiment (FBCE) equipped with Flow Boiling Module (FBM) was used for both the experiment onboard the International Space Station (ISS) and on Earth. The experiment was conducted in a rectangular channel of 5mm (depth) ×2.5 mm (width) ×114.6 …

Bioluminesence-Induced Photoredox Catalysis And Its Mechanisms, Dominic Jeffrey Bates

Theses and Dissertations

The bioluminescence-induced photoredox reaction (BIPR) is a novel methodology developed to overcome the limitations of photo-induced chemistry by initiating chemical work using bioluminescent Escherichia coli as a photon source. In industry, photochemistry is superseded by thermochemical reaction processes. Despite its massive potential, there are very few applications in industry for photochemistry. Unlike thermochemistry, reaction scale-ups are not as easy as simple dimensional increases in a reaction vessel due to the nature of light. This deficiency is seemingly overcome through the development of flow technologies; however, the overall yield of such methods remains incomparable with those utilizing thermochemistry. This thesis focuses …

Investigating Electrochemical Performance And Interfacial Stability Of Solid-State Lithium Metal Batteries: A Study Of Hybrid Polymer-Ceramic Electrolyte Systems, Ziba Rahmati

Theses and Dissertations

Solid-state batteries (SSBs) are emerging as a promising energy storage technology, surpassing traditional liquid electrolyte (LE) counterparts in performance and safety. A critical component in SSBs is the solid-state electrolyte (SSE), which plays a pivotal role in safety, efficiency and stability. SSEs, including sulfides, halides, oxides, and polymers, present distinct advantages and challenges compared to LEs. Among these, oxide-based SSEs are particularly attractive for their balance in ionic conductivity and chemical stability.

This study addresses key challenges related to interfacial stability and electrochemical performance in SSBs by focusing on hybrid polymer-ceramic electrolyte systems. A major challenge to such a SSB …

The Role Of Spatial Attention In The Maintenance Of Visual Working Memory: Modulatory Effect By Task-Relevance Of Spatial Information And Evidence From Alpha Oscillations, Sori Kim

Theses and Dissertations

The close interplay between spatial attention and visual working memory is essential for optimizing our visual experiences. The following studies investigated this interaction, focusing on how spatial attention influences visual working memory processes. In Chapter 2 a dual-task paradigm was used to examine how the relevance of spatial information to the task modulated the effects of spatial attention. The findings showed that shifting spatial attention away from a potential memory target impaired its consolidation in working memory. In Chapter 3, the experiment aimed to amplify these effects to observe clearer facilitatory and inhibitory processes. However, the results only demonstrated that …

Seeking Solutions: The Impact Of State Policies On Mental And Behavioral Health, Angela Shoulders

Theses and Dissertations

This dissertation examines the impact of state-level policies aimed at improving access to mental and behavioral health treatment in the United States. Using rigorous quasi-experimental methods and a variety of data sources, the three manuscripts analyze the effects of distinct but related policies: naloxone co-prescription laws, psychologist prescription privileges, and mental health parity laws mandating timely access to care. The findings suggest that naloxone co-prescription laws lead to unintended consequences, including an increase in opioid overdose deaths among certain demographics. The analyses of psychologist prescribing privileges show expanding prescribing privileges to psychologists increases the availability of mental health providers without …

Effect Of Storage Time And Temperature On Aggregation Of Alzheimer's Disease Amyloid-Β Protein, Amy Veihdeffer

Theses and Dissertations

Amyloid-β protein (Aβ) is widely studied due to its key role in Alzheimer’s disease (AD) pathology. One characteristic of patients suffering from AD is the deposition of amyloid plaques comprised of Aβ aggregates, which are associated with synapse damage. Thus, studying Aβ aggregation and aggregation inhibition may provide pathological and therapeutic insights. Aggregation of Aβ is a nucleation dependent process that may be influenced by the presence of pre-formed Aβ aggregate seeds that can facilitate formation of protein aggregates. These seeds may appear during preparation or storage of monomer, posing impact on experiments that study the aggregation process and the …

From Classical To Contemporary: Popular Music's Role In Shaping Opera And Vocal Training, Craig Allen

Theses and Dissertations

This dissertation advocates for the integration of contemporary popular music into classical voice education, addressing the evolving landscape of the performing arts. As the boundary between classical and popular music fades, incorporating popular elements into traditional opera training equips performers for modern industry demands.

The first chapter offers a historical analysis, tracing opera’s origins from the late 16th century and showing how popular music influenced its development. Composers incorporated folk melodies and dance rhythms into early opera, setting a precedent for blending styles. Contemporary operas, such as Nkeiru Okoye’s Harriet Tubman and Nmon Ford’s House of Orfeus, continue this tradition, …

Interpretation Of Surface Roughness Of Stainless Steel 316l In Laser Powder Bed Fusion Additive Manufacturing, Tianyu Zhang

Theses and Dissertations

Laser Powder Bed Fusion (L-PBF), a widely used metal additive manufacturing (AM) method, is emerging as a key technology in the modern manufacturing industry. Its applications span across aerospace, transportation, energy, and biomedical industries, aiming to maximize product functionality, quality, and manufacturing efficiency.

Surface roughness, an important measure of product quality, impacts geometrical tolerances and plays a critical role in mechanical and functional properties. Although post-process techniques such as machining, shot peening, and chemical processing can be used to refine surfaces, internal surfaces in complex geometries remain difficult to treat, limiting part performance due to undesired surface features. The …

Retrospective Of My Experience At The University Of South Carolina, Karl Dickey

Theses and Dissertations

Theatre is, by its very nature, a collaborative process. No show lives in true isolation. Even in its smallest version, it takes at least one to perform and one to listen. The theatre that is produced in the 21^st century is deeper and more complex a process than the finished and polished shows that are presented to the audience. Behind, underneath, and all around a single performer on a stage are hours of thoughtful contemplation and execution on the part of the director, designers, and fabricators. There is something to be learned and gained from every human interaction in …

An Examination Of Civil Asset Forfeiture In South Carolina, Jeffrey Trowbridge

Theses and Dissertations

Civil asset forfeiture allows the government to seize and forfeit property that is associated with criminal activity without arresting or charging the property owner. Although expansive in its potential application, little is understood about the characteristics of civil asset forfeiture cases, the property owners involved in forfeiture cases, or the characteristics of any criminal cases pursued parallel to the civil cases. Utilizing open-source, public court records, this dissertation provides an exploratory analysis of these gaps in the literature by examining the types of civil asset forfeiture used, the value of asset forfeiture cases, how money from asset forfeiture is divided …

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 …

Bayesian Nonparametric Models For Pooled Data, Yizeng Li

Theses and Dissertations

This work examines two applications of pooling: group testing and pooled biomonitoring. Group testing, introduced by Dorfman in the early 1940s, was initially developed to screen for syphilis among U.S. inductees during World War II. Since then, the approach has demonstrated cost-saving benefits in diverse fields, including drug discovery, genetics, and infectious disease testing. While various regression methods—parametric, nonparametric, and semiparametric—have been proposed to analyze group testing data, they fall short in addressing age-related disparities in disease presence if such variations exist. In Chapter 2, we address this gap by expanding varying coefficient regression within a Bayesian framework to accommodate …

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 …

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 …

Panic At The Library: Origins And Manifestations Of Library And Technology Anxiety In High School Sophomores, Kelly A. Guistwhite

Theses and Dissertations

Constance Mellon formally identified library anxiety in the mid-1980s. Library anxiety can result in students avoiding the library, its resources, and its staff. Students with library anxiety perform worse on academic tasks than their more comfortable peers. Library anxiety causes procrastination on assignments and undermines academic success. Technology anxiety has evolved with library anxiety changing as new information technology becomes available. This exploratory research investigated to what extent library and technology anxiety manifests among sophomore students, the relationship between library anxiety and technology anxiety, and the perception of online services at Maple Bluff and Scarlett Woods High Schools. This study …

The State Math Assessment, I-Ready Diagnostic, And The State Accountability Plan: Is This An Assessment System To Support Learning For All Students?, Beverly Quinn

Theses and Dissertations

This study examined the relationship between a state high-stakes summative mathematics assessment and an interim third-party math diagnostic assessment and data literacy among teachers in a Southeastern school district. Despite ongoing federal and state accountability efforts, the gap between policy intentions and student achievement continues to grow. In this quantitative correlational study, the relationship between the Spring 2023 state summative and interim assessment data for fourth and eighth-grade students was examined. Additionally, the Teacher Data Usage Survey (TDUS) responses were analyzed to examine how teachers utilize assessment data in instructional practices. Data were reported as percentages of responses per category …

You're Not The Only One Who Can Teach Us: Teacher Facilitation In Three Secondary School Music Contexts, David Dwight Bowman

Theses and Dissertations

Over the last half-century, school music reforms have focused more on content than process, and the directive teaching that serves as the dominant method used by secondary school music teachers is not adequately meeting the needs of the students who currently occupy American high schools. To improve teaching practice in one such high school, an action research study was conducted to investigate the use of facilitative teaching strategies, how those teaching strategies impact students’ learning experience, and what the perceived impacts of those strategies are. A qualitative case study methodology was employed to determine how an intervention period of facilitative …

Associations Between Self-Reported Levels Of Aggression, Irritability, And Depression In Collegiate Athletes With A History Of Concussion, Amber Mae Bankston

Theses and Dissertations

Objective: The aim of this study was to examine the relationship between history of concussion and symptoms of aggression, irritability, and depression. Furthermore, the relationship between these variables were examined in a small subgroup of participants before and after sustaining a head injury.

Methods: Archival data of NCAA Division II and club collegiate athletes from Florida Institute of Technology was included in the present study. Participants were included in this study if they completed baseline and/or post-trauma neuropsychological evaluations that included the Patient Health Questionnaire-9 (PHQ-9), Buss Perry Aggression Questionnaire (BPAQ), and Irritability Questionnaire (IRQ). Athletes’ demographic information along with …