Digital Commons Network^™

Structure Preserving Reduced-Order Models Of Hamiltonian Systems, Megan Alice Mckay

Theses and Dissertations

Large-scale dynamical systems are expensive to simulate due to the computational cost accrued y the substantial number of degrees of freedom. To accelerate repeated numerical simulations of the systems, proper orthogonal decomposition reduced order models (POD-ROMs) have been developed. When applied to Hamiltonian systems, however, special care must be taken when performing the reduced order modeling to keep their energy-preserving nature. This work presents a survey of several structure-preserving reduced order models (SP-ROMs). In addition, this work employs the discrete empirical interpolation method (DEIM) and develops an SP-DEIM model for nonlinear Hamiltonian systems. The wave equation is considered as a …

Investigating The Impact Of Nonlinguistic Cognitive Reserve On Naming Pre- And Post-Treatment, Lillian Jarold

Theses and Dissertations

Background: The relationship between linguistic and nonlinguistic cognition in persons with aphasia is complex and often debated in the literature. Furthermore, the impact of nonlinguistic cognition on aphasia treatment outcomes is unclear. The present study sought 1) to examine the relationship between WAIS scores and performance on a test of naming and 2) to examine the relationship between WAIS scores and change scores on a test of naming between baseline and post-treatment in persons with chronic aphasia.

Method: This retrospective study utilized data from participants (N=102) who were recruited for a multi-center cross-over trial (POLAR: Predicting Outcomes of Language Rehabilitation). …

The Impact Of An Interactive Simulation Program On English Language Learner Achievement In A Middle School Science Classroom, Scott Sutherland

Theses and Dissertations

The purpose of this study was to determine how a particular technology program, Gizmos, would impact English language learner students in demonstrating their verbal and written comprehension of science content at a proficient level. Gizmos were incorporated as an intervention to facilitate the teaching of two different topics, convection cells and hurricane motion. This study involved three English language learner students with varying World-Class Instructional Design and Assessment (WIDA) proficiency levels between one and four. Semi-structured interviews, semi-structured observations, and work samples were conducted and collected from each of the participants. My analysis demonstrated a strong correlation between the use …

Hybrid Theory-Machine Learning Methods For The Prediction Of Afp Layup Quality, Christopher M. Sacco

Theses and Dissertations

The advanced manufacturing capabilities provided through the automated fiber placement (AFP) system has allowed for faster layup time and more consistent production across a number of different geometries. This contributes to the modern production of large composite structures and the widespread adaptation of composites in industry in general and aerospace in particular. However, the automation introduced in this process increases the difficulty of quality assurance efforts. Industry available tools for predicting layup quality are either limited in scope, or have extremely high computational overhead. With the advent of automated inspection systems, direct capture of semantic inspection data, and therefore complete …

Modified Em Algorithm In Smcure Package Based On Proportional Hazards Mixture Cure Model With Offset Terms, Jiaying Yi

Theses and Dissertations

Mixture cure model is a useful method of survival analysis for population including cured proportion and uncured proportion. The R package SMCURE applies EM algorithm to estimate the coefficients of covariates in the mixture cure model. Although an offset term is specified in the SMCURE statement, the offset term is not appropriately handled in the algorithm. This thesis aims to adjust the EM algorithm for the proportional hazards mixture cure model in the SMCURE package. In addition, the offset term can be specified separately in the incidence part or the latency part. The numerical experiments include simulation study and real …

Cognitive Consequences Of Covid-19 Infection And Quarantine-Induced Social Isolation: Hope For The Young And Mildly Infected, Kristin Nickole Kirchner

Theses and Dissertations

Coronavirus disease 2019 (COVID-19) has infected over 539 million individuals worldwide, and initial research supports the possibility that COVID-19 may damage the central nervous system either directly or indirectly. Neurological signs and noted cognitive deficits observed in even mildly infected patients are a cause for concern for those infected by COVID-19; the effect of social isolation on the central nervous system is also of interest. The present study sought to determine the extent of these potential cognitive deficits in a young and mildly infected sample of college students. Participants completed an extensive survey assessing their experience with COVID-19 and any …

A Finding Place: Social Justice Poetry Toward Empathy In The Secondary English Language Arts Classroom, Patricia Vicino

Theses and Dissertations

This study examined the effects of a combined reader-response and close reading approach to social justice poetry on the empathy levels of secondary level English Language Arts students in my classroom. This action research study occurred over a six-week period during a Fall 2021 English elective course with six student participants in a high school within South Carolina. Research was conducted via a mixed methods approach that analyzed both quantitative and qualitative data from prestudy and poststudy Likert scales along with surveys, interviews, observation notes, and artifacts. The data revealed that student empathy levels were elevated after the study unit …

Assessing The Impact Of Online Homework On 8th Grade Students’ Mathematical Proficiency And Perceptions: An Action Research Study, Chad Williams

Theses and Dissertations

This action research aimed to assess the impact of online homework, delivered via IXL, on thirteen 8th Grade Mathematics students' mathematical proficiency and explored their perceptions of its usefulness. The Cedar Hill Middle School students typically scored below state and national averages in mathematics, necessitating increased rigor and support. Two main questions guided the research in this study. The first question assessed the impact of online homework on students' mathematical proficiency according to the National Council of Teachers of Mathematics (NCTM) definition, looking specifically at strategic competence, conceptual understanding, procedural fluency, and adaptive reasoning. The second question investigated students' perceptions …

A Performance Guide To Hyo-Geun Kim’S Art Pop For Korean Art Songs, Taeyoung Seon

Theses and Dissertations

This document contains information about instructions regarding singing with Korean diction for Korean Art songs by a gifted Korean composer, Kyo-geun Kim. He is now a Professor of Business at Ewha Women’s University in the Republic of Korea. The writer offers a brief biography of Kim as a composer and a scholar of music and business. This document will help anyone who would like to learn Korean diction for singing Korean Art Song, particularly, Hyo-geun’s Art Pop Art Songs such as Snow, A Thousand Winds, and What Though Life Conspires to Cheat You. The works are termed ART POP, it …

Exploring Technology Integration At A Public Middle School: A Descriptive Research Study On Integration Perceptions, Factors, And Barriers, Charlene Jeffreys

Theses and Dissertations

The purpose of this action research was to explore mathematics teachers’ current instructional practices and perceptions of technology integration, as well as the perceived barriers that influence their technology integration in the classroom. Teacher perceptions of technology integration at this public middle school. Across the country, states have partnered with federal efforts, taking an active role in building a technology-rich learning environment in their states (Education Superhighway 2017). Teachers have access to a wide range of tools and practices that involve using and creating appropriate technological processes and resources to facilitate teaching, engage students, and improve learning outcomes (Richey & …

Faculty Perspectives On Assessment And Placement: A Mixed Methods Study Of The Social Validity Of Placement Tests, Multiple Measures Placement, And Guided Self-Placement, Dawn R. Coleman

Theses and Dissertations

Community colleges are under ongoing pressure to increase the success of students placed into developmental courses; while many reforms focus on the length of course sequences, there is also attention on how students are assessed and placed. Studies of these assessment and placement (A&P) methods focus primarily on predictive validity; one aspect of validity that is neglected is social validity, which assesses the extent to which the goals, procedures, and effects of an intervention are socially desirable.

The purpose of this study was to use a social validity framework to explore the perspectives of community college math and English faculty …

Using Multimedia Vocabulary Games To Improve Newcomer Esol Students Motivation And Vocabulary Acquisition, Elizabeth E. Brittingham

Theses and Dissertations

This study looks at the use of the multimedia learning platform, Quizlet, to help newcomer ESOL students learn English vocabulary. The use of Quizlet to learn vocabulary is supported by Mayer’s Cognitive Load Theory. With an influx of ESOL students, and a lack of teacher training, Quizlet may help to create a more equitable solution for newcomer ESOL students to learn English vocabulary. The findings of this study show that newcomers benefit from using Quizlet to learn vocabulary in the language 2 by matching it to the vocabulary in the language 1, but only if they are able to read …

Differentiating Pleistocene Alloformations In The South Carolina Coastal Plain Through Lithologic, Textural, Mineralogical, And Cluster Analyses, Charles Andrew Wykel

Theses and Dissertations

Currently, there is no textural or mineralogic basis for identifying and differentiating Pleistocene strand deposits in the South Carolina (SC) Lower Coastal Plain (LCP). Historically, geologic mapping of the SC coastal plain uses geomorphologic and biostratigraphic techniques for identifying and mapping LCP surficial strand deposits. While useful, both approaches have problems. The aim of this study is to develop a cost-effective approach to differentiate and identify strand deposits of different Pleistocene alloformations occurring in the SC LCP. To accomplish this task, four strand samples were taken from the Ten Mile Hill, the Ladson, and Wicomico alloformations in Horry County, SC. …

Where Are The Girls? Exploring Influences On Female Eighth Grade Public School Students’ Choices Of Technology Classes In Texas: A Mixed Method Action Research Study, Shasta Colon

Theses and Dissertations

There is a continuing trend of unrepresented female students in STEM classrooms, particularly in technology courses. There is a focus on the K-12 learning environment to increase the number of female STEM students, which will encourage a growth in participation for females in the STEM field (Sassler, Glass, Levitte, & Michelmore, 2017). The purpose of this study was to increase the number of females students who enroll in technology courses in a public school in Kether Independent School District (KISD). The participants were 66 eighth–grade female students who were enrolled in the College and Career Readiness (CCR) and Technology Applications …

Incremental, Spaced Repetition And Studymate Flashcards: The Impact On College Student Memorization Of Measurement Conversion Standards, Patricia A. Bromer

Theses and Dissertations

The purpose of this action research was to evaluate the impact of and student perception of incremental, spaced repetition of StudyMate electronic flashcard use on memorization of measurement conversion standards for an online Mathematics in Health Sciences course. Online college classes require more self-direction and usually do not allow for partner or group work. These characteristics of online classes may hinder students’ ability to memorize crucial information, increasing their cognitive load and leading to feelings of inadequacy. This mixed methods study assessed the impact of incremental, spaced repetition of StudyMate flashcard use on college math students’ memorization of measurement conversion …

Effects Of Positive Social Comparative Feedback During Practice On Motor Sequence Learning, Performance Expectancies, And Resting State Connectivity, Allison Foster Lewis

Theses and Dissertations

Positive social comparative feedback indicates to the learner that they are performing better than others. While this type feedback supports motor skill learning in some tasks, the effect of social comparative feedback on motor sequence learning remains unknown. In addition, the OPTIMAL theory predicts that positive social comparative feedback may trigger a dopaminergic response in the brain. However, no studies have utilized neuroimaging techniques to investigate this question. Therefore, the aim of these studies was to determine the effect of positive social comparative feedback on motor sequence learning, performance expectancies, and resting state connectivity of dopaminergic neural pathways.

In the …

Statistical Methods For Analyzing Multi-Omics Data: Dependence Structure And Missing Values, Wenda Zhang

Theses and Dissertations

The advancements in high-throughput technologies have made it possible to generate a huge number of "omics'' data, including genomics, proteomics, transcriptomics, epigenomics, metabolomics, and microbiomics. Combining multiple data sources and performing joint analyses with all available information and the phenotypic outcome can reflect various aspects in complex biological systems, such as revealing regulation processes, discovering novel associations between biological entities, and identifying relevant biomarkers for certain diseases or phenotypic outcomes. This dissertation focuses on developing statistical models for analyzing multi-omics data. It is comprised of three topics: (1) integrative analysis for multi-omics data with missing observations in intermediate variables; (2) …

Physical Activity And Stress Between American Students And Asian International Students At The University Of South Carolina, Hao Lei

Theses and Dissertations

Many college students are physically inactive and have high levels of stress, and this may be worse among increasing number of international students studying in the US. This study investigated the relationship between physical activity and stress among American students (n=92) and Asian international students (n=64). The Mann-Whitney test was used to compare MET minutes/week from the International Physical Activity Questionnaire short form between those two groups. The independent-samples t test compared the mean of stress from the Perceived Stress Scale between those two groups. Chi-square test was used to compare the percentage of Asian international students and American students …

Reconceptualizing Informal Learning In An Online Learning Environment, Silvia Clark

Theses and Dissertations

In 2020, many organizations moved their formal training programs to an online learning context due to COVID-19. Informal learning, which refers to activities that are self-guided and occur independently outside of formal learning contexts has gained significant interest among researchers and practitioners in the past two decades as it has been identified as the primary type of learning in today's organizations. Despite the increasing interest in informal learning, no attempt has been made to examine and understand informal learning in an online learning environment.

This dissertation provides an integrative review of prior work on formal and informal learning in online …

Using Visual Arts To Teach Beginning Literacy Skills, Stacy Phaxaysithideth

Theses and Dissertations

This study examined the effect of using visual arts to teach rhyming words and word family words. Two interventions were used, both utilizing the use of visual arts to learn both literacy skills. The interventions were then assessed with a pre- and post-test to see the if the interventions were successful. A student attitude survey was also given at the end of the study to see how the students felt about the interventions. A semi-structured interview was done at the end of the interventions as well to collect the thoughts of my co-teacher on the interventions. Lastly, my teacher observations …

Materials Discovery By Flux Crystal Growth: Synthesis, Structure Determination, Magnetic, And Optical Properties Of Complex Oxides, Oxychlorides, And Oxyfluorides, Darren Andrew Carone

Theses and Dissertations

Exploratory crystal growth has proven to be a successful technique in the synthesis of new compounds with desired properties. This method is very versatile and has various iterations, but results described herein were obtained through flux growth at high temperatures utilizing mixed alkali halide salts. The tunability of these reactions with respect to reactant ratios, reaction temperature, heating/cooling rates, metal precursors, and choice of flux allow for the exploration of phase spaces between a combination of elements and observation of significantly different products and/or structure types from minor tweaks.

Most of the research presented in this dissertation describes results that …

Cnn-Based Semantic Segmentation With Shape Prior Knowledge, Yuhang Lu

Theses and Dissertations

Semantic segmentation that aims at grouping discrete pixels into connected regions is a fundamental step in many high-level computer vision tasks. In recent years, Convolutional Neural Networks (CNNs) have made breakthrough progresses in public semantic segmentation benchmarks. The ability of learning from large-scale labeled datasets empowers them to generalize to unseen images better than traditional nonlearning-based methods. Nevertheless, the heavy dependency on labeled data also limits their applications in tasks where high-quality ground truth segmentation masks are scarce or difficult to acquire. In this dissertation, we study the problem of alleviating the data dependency for CNN-based segmentation with a focus …

Truth And Identity In Dostoevsky’S Raskolnikov And Prince Myshkin, Gwendolyn Walker

Theses and Dissertations

Situated in the context of Bakhtin’s understanding of Dostoevsky’s narrative structure, the goal of this thesis aims to analyze the ways in which Dostoevsky’s characters negotiate their identities through a dialogic process of truth-telling as it appears in two forms: an explicit expression of truth that is consciously made by a novel’s characters in earnest dialogue, and an unspoken, even unconscious expression of truth that is not openly expressed, but can be inferred from the seemingly illogical reactions and behaviors of characters in the novel. The latter form is established in terms of Freud’s discussion of the unconscious and unconscious …

An Assessment Of The Performance Of The Earthscope Automated Receiver Survey: A User’S Guide To Ears., Erin L. Taxon

Theses and Dissertations

An Assessment of the Performance of the EarthScope Automatic Receiver Survey: A User's Guide to EARS.

With the advent of digital seismic recording, the ability to process and interpret large quantities of seismic data has become increasingly vital. EarthScope Automated Receiver Survey, EARS, was launched in 2005 to estimate bulk crustal properties in real time, at all broadband seismograph stations, globally. EARS utilizes the receiver function HK stacking method to estimate a station’s crustal thickness (H) and ratio of P wave velocity (Vp) and S wave velocity (Vs), known as Vp/Vs (K). Receiver function analysis observes the arrival times …

Study Of Radiative Corrections In The Muon Scattering Experiment, Lin Li

Theses and Dissertations

The root-mean-square (rms) radius of the proton charge is a fundamental quantity. In 2010, the studies of muonic hydrogen with high precision found a notably smaller value than the one from earlier non-muonic measurements. This discrepancy has led to theoretical and experimental investigations. A missing measurement in determining the proton radius is muon scattering, a measurement that the MUon Scattering Experiment (MUSE) collaboration proposed at Paul Scherrer Institute (PSI). MUSE will measure elastic electron-proton and muon-proton scattering data with positively and negatively charged beams in a four-momentum-transfer square range from Q2 = 0.002 to 0.08 GeV² . Each of …

Null Hypothesis Statistical Testing: A Survey Of The History, Critiques, And Alternative Methodologies, Bradley David Rogers

Theses and Dissertations

Considered normative from the second half of the 20th century (Danziger, 1990), null hypothesis statistical testing (NHST) has received consistent, largely unheeded criticism. Critiques have received more attention in recent years with the recognition of the replication crisis in the social sciences and the American Statistical Society’s statement and special issue on p values (Wasserstein & Lazar, 2016; Wasserstein et al., 2019). This paper seeks to provide a framework for understanding the issue by looking at the history of NHST and investigating some alternatives to the methodology. A brief review of the history, spread, and critiques of NHST is provided …

Image-Based Crack Detection By Extracting Depth Of The Crack Using Machine Learning, Nishat Tabassum

Theses and Dissertations

Concrete structures have been a major aspect of social infrastructure since the ancient Roman times, so they have been used for many centuries. Concrete is used for the durability and support it provides to buildings and bridges. Assessing the state of these structures is important in preserving the longevity of structures and the safety of the public. Detecting cracks in their early stage allows repairs to be made without the need to replace the whole structure, so it reduces the cost. Traditional methods are slowly falling behind as technology advances and an increase in demand for a practical method of …

Adapting North American Fiddle Bow Technique To The Double Bass, Spencer Jensen

Theses and Dissertations

Because of the pioneering work of Edgar Meyer in expanding the role of the double bass in American folk music, many bassists are inspired to engage with fiddle music in the way fiddlers do. Thus, bassists who perform in fiddle and string band traditions may seek greater artistic freedom and expression by shifting between a variety of accompanying textures to playing melody and improvised bowed solos.

In seeking to discover how bassists successfully adapt fiddle bowing techniques to the double bass, I have interviewed two bassists who are deeply involved in Americana music traditions, Paul Kowert and Ethan Jodziewicz. From …

On Incorporating The Stochasticity Of Quantum Machine Learning Into Classical Models, Joseph Lindsay

Theses and Dissertations

While many of the most exciting quantum computing algorithms are currently impossible to be implemented until fault-tolerant quantum error correction is achieved, noisy intermediate-scale quantum (NISQ) devices allow for smaller scale applications that leverage the paradigm for speed-ups to be researched and realized. A currently popular application for these devices is quantum machine learning (QML). Recent works over the past few years indicate that QML algorithms can function just as well as their classical counterparts, and even outperform them in some cases. Many current QML models take advantage of variational quantum algorithm (VQA) circuits, given that their scale is typically …

Meaningful And Interactive Learning Experiences Provided Through A Learning Management System: An Action Research Study In Ninth Grade Advanced Placement Human Geography, Daniel Robert Plonski

Theses and Dissertations

The purpose of this mixed methods action research was to determine if increased interactive Schoology-based modules could alter learner perceptions concerning the lack of meaningful learning (learner-instructor, learner-learner, learner-content) in the culture unit of instruction in an Advanced Placement Human Geography (APHG) classroom. A series of instructional modules were facilitated through the learning management system (LMS) Schoology to students (n = 16) in APHG at a southeastern U.S. high school. The interactions were designed to enhance interaction based upon the criteria provided by Piaget’s (1981) social constructivist theory, specifically Moore and Kearsley’s (2011) systems approach and Miyazoe and Anderson’s (2010) …