Digital Commons Network^™

Variability In Semidiurnal Surface And Internal Tides In Global Ocean Model Simulations, Harpreet Kaur

Dissertations

This dissertation focuses on semidiurnal (D2) surface and internal tides. Chapter 2 investigates the transition of M₂ barotropic Kelvin waves into Hybrid Kelvin-Edge (HKE) waves and the associated generation of internal tides at widening shelves using theory and a realistic global baroclinic Hybrid Coordinate Ocean Model (HYCOM) simulation. To understand the effect of complex, realistic bathymetry on the HKE wave transition, we perform quasi-realistic barotropic HYCOM simulations of the Celtic Sea/Bay of Biscay shelf areas. We conclude that the HKE wave transition is most likely masked by the effects of complex bathymetry and offshelf baroclinic fluxes cannot be exclusively …

The Impact Of Hybrid Working On Employee Way Of Life And The Need To Reshape The Employee Value Proposition, Kanishka Chandanamali Athalage

Dissertations

This dissertation details a post-pandemic qualitative investigation conducted to understand the impact of hybrid working solutions on reshaping the employee value proposition (EVP) in the health insurance industry of the UAE. The research aims to evaluate how the introduction of modern hybrid working solutions impacts employees in a post-pandemic environment and, in turn, whether this creates a demand for human resources to refocus drivers of the EVP. Traditionally, EVP is referred to as the overall give-and-get in an employment deal; however, the pandemic was an eye-opener for organizations to redefine what it entails. Since hybrid working has become the new …

Depressurization Characteristics Of Steam-Based Reciprocating Vacuum Pump, Hongling Deng

Dissertations

This dissertation introduces a novel vacuum technology that leverages low-pressure saturated steam and cooling-controlled condensation, offering an efficient way to utilize low-grade thermal energy sources like waste heat, steam, or solar energy. At the heart of this technology is a unique duo-chamber vacuum pump system, featuring a reciprocating piston and a heat-conductive wall, designed to generate a vacuum through steam-condensation and cooling processes.

The core of this research lies in developing and validating mechanistic models for the steam-condensation depressurization process, a complex phenomenon involving phase change and transport mechanisms. Prior to this work, these mechanisms were not sufficiently modeled or …

Model-Based Deep Autoencoders For Clustering Single-Cell Rna Sequencing Data With Side Information, Xiang Lin

Dissertations

Clustering analysis has been conducted extensively in single-cell RNA sequencing (scRNA-seq) studies. scRNA-seq can profile tens of thousands of genes' activities within a single cell. Thousands or tens of thousands of cells can be captured simultaneously in a typical scRNA-seq experiment. Biologists would like to cluster these cells for exploring and elucidating cell types or subtypes. Numerous methods have been designed for clustering scRNA-seq data. Yet, single-cell technologies develop so fast in the past few years that those existing methods do not catch up with these rapid changes and fail to fully fulfil their potential. For instance, besides profiling transcription …

Development Of Novel Protein Digestion And Quantitation Methods For Mass Spectrometic Analysis, Yongling Ai

Dissertations

Proteins are the workhorses of biology, playing multifaceted roles in maintaining cellular function, signaling, and response to environmental cues. Understanding their abundance and dynamics is pivotal for unraveling the complexities of biological processes, which underpins the foundations of molecular and cellular biology. Accurate measurement of protein quantities provides insights into cellular homeostasis, facilitates the discovery of biomarkers, and sheds light on the molecular mechanisms of diseases, bridging the gap between the molecular intricacies of proteins and their functional consequences in health and disease. The evolution of protein quantitation methodologies, from classical colorimetric assays to sophisticated mass spectrometry-based approaches, has expanded …

Revitalizing The Middle-Skill Talent Pipeline: Exploring The Decision To Enroll In A Postsecondary Career And Technical Education Program, Felicia Hall

Dissertations

A workforce shortage exists within occupations requiring educational training beyond high school but less than a 4-year degree, known as middle-skill occupations. Career and Technical Education (CTE) programs offered at community colleges throughout the United States equip graduates at the middle-skill level. Although affordable CTE programs are readily available, little is currently known about what makes students consider and ultimately enroll in postsecondary CTE programs. This qualitative phenomenological study investigated the decision to enroll in a postsecondary CTE program as experienced by current students at a North Alabama community college to identify enablers and barriers faced during the decision to …

Using Afm-Ir To Study Nanoscopic Phase Behavior Of Polymer Blends And Photovoltaic Bulk Heterojunctions, Nathaniel L. Prine

Dissertations

Conjugated polymers (CPs) and polymer blends harbor the potential for high-performance organic solar cells (OSCs) due to their short energy payback time, low cost, solution processability, lightweight attributes, and flexibility. However, OSCs suffer from poor thermal stability compared to their inorganic equivalents. This study explores the thermal instability of OSCs, focusing on phase separation of the photoactive layer under heat, resulting in morphology changes and degradation of power conversion efficiency (PCE). Utilizing atomic-force microscopy coupled with infrared spectroscopy (AFM-IR) and differential scanning calorimetry (DSC), we delve into thermal stability-morphology relationships to devise strategies to improve OSC blend durability under thermal …

Timeseries Forecasting Of U.S. Housing Price Index Using Machine Learning And Deep Learning Models, Krishna Chaitanya Nunna

Dissertations

Time series forecasting is a promising technique for various applications which predicts future values or patterns by taking historical data as base. Forecasting future trends is very beneficial for different industries to make valuable decisions and strategies. One such industry is housing market; it has biggest influence on U.S. economy. Housing price index (HPI) is a one of the crucial economic indices published by various government funded and private agency to benefit several industries and individuals for better analysis of future trends of housing market.

Several factors influence the HPI, economical, geographical, and demographic features. Development of traditional time series …

Heterotypic Interaction Of Α-Synuclein And Tdp-43 In Neurodegenerative Diseases, Shailendra Dhakal

Dissertations

Amyloid aggregates of specific proteins form important pathological hallmarks in many neurodegenerative diseases, defining neuronal degeneration and disease onset. Recently, increasing numbers of patients show co-morbidities and exhibit clinical and pathological overlaps between multiple neurodegenerative diseases including α-synucleinopathies and TDP-43 proteinopathies. These overlaps are often accompanied by co-localization of α-synuclein (αS) and TDP-43 enhancing the possibility of direct interactions to generate heterotypic amyloids with distinct cellular consequences. To understand this, we investigate the interaction of α-synuclein (αS) and prion-like domain of TDP-43 (TDP-43 PrLD) in both homogenous and inhomogeneous phases. Firstly, we show that monomeric TDP-43 PrLD and αS interact …

Intelpvt And Opt-Stvit: Advances In Vision Transformers For Object Detection, Classification And Video Recognition, Divya Nimma

Dissertations

Since the advent of Transformers, followed by Vision Transformers (ViTs), great success has been achieved by researchers in the field of computer vision and object detection. The difficult mechanism of splitting images into fixed patches posed a serious challenge in this arena and resulted in the loss of useful information at the time of object detection and classification. We propose an innovative Intelligent-based patching mechanism to overcome the challenges and integrate it seamlessly into the conventional Patch-based ViT framework. The proposed method enables the utilization of patches with flexible sizes to capture and retain essential semantic content from input images, …

An Analysis Of The Effects Of Visual Art And Gender On Secondary Students’ Achievement In Geometry, Johnny Gary Iii

Dissertations

Students’ understanding of geometry can be hampered in part because of their inability to visualize, describe, draw, and recognize images and shapes. What if art and making could support students’ mathematics learning and interest and help them over the geometry hurdle? This work investigated visual-arts integrated geometry lessons to explore its impact on high school students’ understanding and attitudes. This study used a quasi-experimental mixed methods design, with a pre- and post- survey and interview data collected from geometry students at Mississippi high school. The control group was taught the same geometry content using a traditional curriculum, and the treatment …

Structural Features Of Hiv-1 Integrase In The Late Stage Of Viral Replication, Tolga Catmakas

Dissertations

HIV-1 integrase (IN) is an essential enzyme for the viral life cycle as it integrates viral genomic material into the host cell genome. In addition to its’ essential catalytic function, IN has another important non-catalytic role where it binds the viral RNA to facilitate successful particle maturation during the viral life cycle. A significant number of IN mutants, addressed as class II IN mutants, show various defects, affecting different steps of the viral life cycle. Class II IN mutants exhibit aberrant morphology where viral ribonucleoprotein particles are mislocalized outside of the capsid core. This phenomenon can be observed in the …

An Examination Of Influential Factors Of Academic Dishonesty And Ethical Decision-Making Among Community College Nursing Students, Roshelle L. Lemon-Howard

Dissertations

Academic dishonesty remains a pervasive, multi-discipline dilemma which has been reported as having the propensity of resulting in longstanding consequences beyond academic settings. Previous research has suggested that students who participate in dishonest behaviors while attending institutions of higher education have greater tendencies to engage in dishonest and unethical behaviors within professional settings. Notably, schools of nursing are not exempt from academic dishonesty and the ramifications that have been associated with such misconduct. Although academic dishonesty has been examined from various perspectives, and in numerous contexts, current studies that compare relationships between peer and faculty influences on academic dishonesty and …

Biophysical Factors Affecting Habitat Suitability For Crassostrea Virginica, Jason D. Tilley

Dissertations

Oyster reefs provide a variety of important ecosystem services. However, the mortality rate of eastern oyster, Crassostrea virginica, the dominant species that produces oyster reefs in the northern Gulf of Mexico, is increasing at an alarming rate due to a variety of abiotic and biological factors. I examined how biophysical factors, including the less-studied fatty acid profiles of the suspended particulate matter on which oysters feed, influenced morphometric condition of C. virginica.

I sampled suspended particulate matter (SPM) and oysters in-situ in the western Mississippi Sound, which historically supported the majority of oyster production in Mississippi waters. Sampling …

Spatial Visualization Of High School Geometry Students, Jennifer Crissey

Dissertations

Spatial ability has been defined as “the innate ability to visualize that a person has before any formal training has occurred, i.e., a person is born with ability” (Sorby, 1999, p. 21) and is comprised of spatial orientation and spatial skills.Each of these facets are used in everyday life. High school students can enhance their spatial visualization skills through experiences and instruction. The purpose of this study was to test an intervention with the aim of increasing high school geometry students’ spatial visualization skills. The participants in this study were high school geometry students who were randomly placed in either …

Experimental And Theoretical Investigations Of Novel 2d Magnet Heterostructures And Magnetic Thin Films, Stephen Hofer

Dissertations

Since the first usage of magnets as navigation tools, magnetism has been an integral part of human technology. As such, with increased demand for more sophisticated technologies, the need to understand magnetism and its applications has also increased. In modern times, the focus of new technologies is on scalability, or how things behave on the smallest scales. To this end it is necessary to understand the fundamental and practical behaviors of magnetic materials at this limit. Recent discoveries in the field of true 2D magnets and the field of topological matter demands investigation of the intersection between these two fields. …

Teacher Evaluations, Pbis Implementation, And Student Outcomes, Kasey Catherine Keith Boyd

Dissertations

This study explored the relationship between the Mississippi Department of Education’s (MDE) Professional Growth System school-wide Teacher Growth Rubric (TGR) score averages by standard and student academic and behavioral outcomes (i.e. state assessment scores, discipline referrals, suspensions, attendance.). The study also examined the relationship among Schoolwide Positive Behavior Interventions and Supports (SWPBIS) implementation fidelity, MDE TGR scores, and student outcomes. Twenty-seven schools were selected to participate in the study. Fifteen of the schools were implementing with fidelity during the 2021-2022 school year, as measured by the Tiered Fidelity Inventory (TFI), and twelve schools were not implementing SWPBIS during the 2021-2022 …

Pedagogical Approaches To Polytempor- Ality And Form Process In György Ligeti’S Études Pour Piano, Premier Livre, Dielan Wu

Dissertations

The first book of Études pour piano is the only cycle considered by the composer György Ligeti (1923–2006) among his eighteen piano études. The formal classification of the cycle, the six études fail to fit in the term of classical form due to its highly conceptual nature. According to Ligeti’s description on temporal concept in his études, an examination of the temporal issues is in need to decode the complex rhythmic structures from the perceptual perspective. Through the examination of the temporal organization, the Études is a compilation of in non-directed linear processes, and each étude is a self-containment via …

An Investigation Of State Teacher Licensure Renewal Policies Related To Students With Disabilities, Lindsey Evelyn Hayes

Dissertations

State teacher licensure renewal policies set standards for continued professional practice while promoting ongoing professional learning and growth. The purpose of this study was threefold: to describe the requirements related to students with disabilities (SWDs) in state teacher licensure renewal policies; to explore how states with high-performing SWDs relicensed teachers; and to investigate the relationship between the rigor of relicensure requirements and student achievement. This study investigated the extent to which current state licensure renewal policies encourage the development of expertise and skills that general and special education teachers need to effectively serve students with disabilities. In the first phase …

Three Essays On Work And Marital Satisfaction In China, Peng Luo

Dissertations

This dissertation comprises three research papers that delve into the relationship between the work characteristics of married Chinese employees and their individual satisfaction in both marriage and work. A common feature of these papers is the meticulous pairing of data, which ensures that each observation includes vital information about their respective spouses. This dataset allows me to conduct a comprehensive exploration of how spouses' work attributes influence individuals.

The first paper employs cross-sectional data to study whether how spouses met through work, and differences in their respective industries are related to their marital satisfaction. The results reveal that how spouses …

Using Explicit Instruction And Frequency Building To A Performance Criterion To Teach Writing To College Students With Disabilities, Alyssa R. Mcelroy

Dissertations

Proficient writing skills are critical for academic, vocational, and social outcomes for individuals with autism spectrum disorder (ASD) and intellectual and developmental disabilities (IDD). However, many individuals struggle to develop proficient writing repertoires. Explicit Instruction (EI) and Frequency Building to a Performance Criterion (FPBC) are two effective teaching strategies. EI is comprised of clear, direct instructions and scaffolding to support a gradual release of responsibility from teacher to student, and follows a model, lead, test format. Once a skill is mastered, it should be built to fluency. FBPC is method that uses timed practice and feedback to build skills to …

A Multi-Objective Stochastic Programming Model For Resilient And Sustainable Supply Chains Under Uncertainty, Mohammad H. Majdfaghihi

Dissertations

Supply chain resilience (SCRES) and sustainable supply chain management (SSCM) have garnered significant attention in the field of Supply Chain Management (SCM) science. This heightened interest is largely attributable to the increasing frequency and severity of uncertainty and disruptions in global supply chains. Resilience is a beneficial approach to managing uncertainties and preparing for and mitigating the adverse consequences of Supply Chain (SC) disruptions. Sustainability is a key concept in SCM, driven by governmental regulations and heightened stakeholder and customer concerns for environmental and societal well-being. Studies on SCRES have traditionally focused on preparing for and reacting to disruptions and …

Teaching Without A Roadmap: A Mixed Methods Study Of New Teachers' Experience With A Missing Curriculum, Christopher Reid Williams

Dissertations

As new teachers enter the field of education, they face many challenges as they work to quickly adapt to the many demands of the job. One of the most pressing factors for new teachers is deciding what to actually teach each day. For educators, the curriculum represents the master plan that both guides their educational efforts and supplies the tools to get the job done. However, new teachers experience varying levels of curriculum support when they begin their careers, and some receive absolutely no support at all. This study describes those cases of beginning a teaching career with little to …

An Examination Of The Casel Social And Emotional Learning Standards In Middle School, Nicole Cramer

Dissertations

In this mixed-methods study the researcher analyzed teacher perceptions of social and emotional learning and whether students in subgroup populations including Black students, students receiving free and reduced lunch, and students with Individualized Education Programs (IEPs) attained social and emotional competency at the same level as peers not in the aforementioned subgroups.

The researcher used the CASEL competencies (self-awareness, self-management, responsible decision-making, social awareness, and relationship skills) to define social and emotional learning data in the study. The researcher used descriptive statistics and a t-test from data collected in a student self-reported survey to determine whether subgroup populations achieved SEL …

The Effects Of The Covid-19 Pandemic On Students In The School Setting: The Adaptations Needed For Tiered Supports, Eleni M. Gajewski

Dissertations

This study aims to evaluate the impact of the Covid-19 pandemic on students in the school setting and identify necessary adaptations needed, particularly through a tiered system of support. The research aims for two primary objectives by employing a constructivist framework utilizing mixed methods for data collection. Firstly, it aims to provide districts with a foundation for understanding the social-emotional and academic consequences of the pandemic on students. Secondly, its purpose is to empower districts to leverage this comprehensive evaluation as a proactive approach to cater to the diverse needs of all students. This includes responding to the challenges posed …

Self Portraits: How The Arts May Be The Key To Equitable And Authentic Engagement For Culturally And Linguistically Diverse Student Populations, Betsy Sostak

Dissertations

As the linguistic and cultural diversity across America’s classrooms steadily increases, educators are searching for ways to meet the needs of their students. The linguistic and cultural resources our students bring are a tremendous asset, yet our country has not been able to fully realize the potential of a diverse population. While multilingual students are often perceived to lack background knowledge, connections to school, and linguistic resources, the arts have the capacity to increase engagement, connect to diverse cultural backgrounds, and transcend language barriers. In this study, I explore the ways in which educational equity may be achieved to a …

Using Mindfulness Through Doodling In Interactive Notebooking To Increase Student Achievement, Michelle Brown

Dissertations

The SARS-CoV-2 pandemic, which unfolded from 2019 to 2021, disrupted education systems worldwide, leading to significant learning loss and inequities. The shift to digital learning, necessitated by the pandemic, presented challenges such as learning loss and social-emotional impacts. This study investigates the incorporation of Social Emotional Learning(SEL), with mindfulness, into the school curriculum to address these challenges.

The focus of the study is on the implementation of Mindful Doodling as a component of SEL within an interactive notebook in a middle school science curriculum to enhance student achievement. The study aimed to analyze how different amounts of Mindful Doodling in …

Making Data Meaningful: Stakeholder Perceptions On Data Visualization And Data Management Practices Within A Multi-Tiered System Of Supports (Mtss), Domenick Saia

Dissertations

Data-driven decision-making and collaboration are core pillars of a multi-tiered system of supports (MTSS); however, timely and accessible data use, as well as data literacy and visualization literacy skills, are challenges school leaders and educators face related to implementing such frameworks. I hypothesized efficient data management systems and data visualization tools enable school teams to predict student learning outcomes, readily communicate, and better understand student data. The purpose of this study design was to highlight a need for more efficient data structures that allow school stakeholders to balance their roles within an MTSS framework more effectively. The context of this …

A Critical Comparison Of Answering Behavior Threshold Determination Methods As An Indicator Of Engagement On The 2015 Pisa Science Items, Lauri Elizabeth Mackelburg-Davis

Dissertations

The validity of low-stakes achievement tests is questionable when disengaged answering (i.e., rapid-guessing and rapid-omitting) is present in even moderate amounts. Thus, identifying these disengaged test-takers is important so that statistical or behavior mediation practices can be put into place. The first step in identifying disengaged examinees is to determine the divide between the engaged examinees and those that are disengaged. Many methods for discriminating between disengaged from engaged answering behavior on computer generated assessments exist. Many methods require expertise in statistical methods, while others require little to no mathematics knowledge. However, these simpler methods are routinely used with little …

A New Approach To Synthetic Image Evaluation, Majid Memari

Dissertations

This study is dedicated to enhancing the effectiveness of Optical Character Recognition (OCR) systems, with a special emphasis on Arabic handwritten digit recognition. The choice to focus on Arabic handwritten digits is twofold: first, there has been relatively less research conducted in this area compared to its English counterparts; second, the recognition of Arabic handwritten digits presents more challenges due to the inherent similarities between different Arabic digits.OCR systems, engineered to decipher both printed and handwritten text, often face difficulties in accurately identifying low-quality or distorted handwritten text. The quality of the input image and the complexity of the text …