Digital Commons Network^™

Fabrication Of Nanofiber Hydrogel Composites And Their Effects On Single-Cell Morphology, Nikolas Belanger

Theses and Dissertations

Regenerating highly aligned soft tissues such as nerves, skeletal muscle, and cardiac tissue remains a major challenge in biomedical engineering due to the complex structural and biochemical cues needed to guide cellular behavior. Tissue engineering scaffolds for aligned soft tissue must allow massive cell infiltration and provide cues that direct cell alignment. Aligned nanofibers offer direction cues but must be included at low density to leave room for cell population. This thesis presents a strategy for fabricating and characterizing nanofiber-embedded hydrogel composites where a permissive hydrogel matrix supports the low density aligned nanofiber architecture. We hypothesized that embedded aligned nanofibers …

Primary Education In Nigeria: A Case Study Of The Global Mandate On Inclusive Education, Olusola John Ogundola

Theses and Dissertations

This dissertation examines how inclusive education, mandated by Article 24 of the United Nations Convention on the Rights of Persons with Disabilities (UNCRPD), is implemented in primary schools in Oyo State, Nigeria. Using a qualitative case study, I explored administrators’ and teachers’ experiences within contexts shaped by colonial legacies, systemic ableism, and resource constraints. Data sources included policy documents, lesson notes, researcher journals, and interviews. Guided by postcolonial and decolonial theory, Disability Critical Race Theory (DisCrit), and Critical Disability Studies (CDS), the study identified five themes: (1) colonial residues in language and schooling; (2) deficit framings of disability; (3) systemic …

Memories, Realities, And Manifestations: A Fifth Grade Collage Inquiry Of Experiences And Hopes, Idalis Jole' Williams

Theses and Dissertations

In this qualitative study, I used collage inquiry to explore fifth-grade students' educational, social, and emotional experiences in an elementary school. The participating students began kindergarten in 2020, a year marked by the sudden disruption of the COVID-19 pandemic. The pandemic shaped the foundation of their schooling in many ways. This study helped us understand the student experience using the arts-based research method of collage inquiry. As the principal and researcher, I invited fifth-grade students to participate in a Collage Club that meets twice weekly across five weeks. The students reflected on their experiences and expressed their hopes for the …

Task Prioritization In Concurrent Speaking And Visuomotor Tasks In Younger And Older Adults, Naomi Wynn

Theses and Dissertations

The present study examined the ability of younger and older adults to prioritize one task over another under divided attention conditions. The speech task involved the repetition of sentences that included specific vowel targets, and the non-speech task was a visuomotor pursuit rotor task which required tracking a moving target on a computer. The participants were twenty young adults between the ages of 18 and 30 and twenty older adults above the age of 60. They performed each task on its own and both tasks concurrently, prioritizing one or the other task. Audio recordings were analyzed with software to extract …

Speech Motor Learning In Divided And Undivided Attention Conditions, Garrett Barnes

Theses and Dissertations

This study investigated the effect of dual tasking on speech motor learning. Forty young adult participants (20 male, 20 female) practiced speaking nonsense words containing non-English consonant clusters. Half of the participants practiced the words while also completing a shape identification task. After practice, the two groups produced the words in a retention task both with and without the shape identification task. They returned the next day to produce the words again with and without the shape identification task. Acoustic analysis of the consonant cluster and word duration was used as an index of motor learning. Statistical analysis revealed that …

Hearing The Difference: Just Intonation Techniques Utilizing Distortion Product Otoacoustic Emissions In Viola Performance, Calj Green Umezono

Theses and Dissertations

Difference tones, also known as distortion product otoacoustic emissions, are the result of active phenomena in the human cochlea during the conversion of sound waves into bioelectrical signals. Difference tones make it possible to explore alternative musical tuning systems beyond the twelve-tone, equally tempered regime. Musicians have investigated difference tones since the 18th Century in Euro-American musical contexts, but their application has so far been limited in scope. Advances in science, technology, and music theory from the late 19th Century through the early 21st Century have given present-day violists the opportunity to more fully understand the virtues of difference tones …

Writers Helping Writers: The Power Of Peer Feedback In Student Writing, Heather Palmer

Theses and Dissertations

The purpose of this action research study was to improve students’ engagement with the writing process by focusing more intently on peer feedback. The study occurred in my sixth-grade classroom in an affluent suburb of a large U.S. city. As an insider to the setting, I used mixed methods to address a problem of practice, having noticed that students were not engaging in revision between their first and final drafts. Through the lens of social constructivism, I examined data collected through surveys, semi-structured interviews, and writing samples. Being both reviewers and recipients of feedback had positive yet distinct impacts on …

Erosion Of Bermuda Grass Covered Soils, Oru-Ntui Johnwatters Nkiri

Theses and Dissertations

Earthen embankments are the most common type of embankment due to the relatively low cost, simplicity, and material availability. However, they are also the most prone to erosion related failure, typically due to overtopping and piping. Research has been conducted to identify ways to control soil erosion and protect earthen embankments with different approaches such as addition of chemicals and biopolymer to the soil, installation of protective layering (geotextiles, concrete), increased soil compaction, and use of vegetation. This thesis considers the use of Bermuda Grass to increase resistance to erosion and protect embankments from failure during overtopping. Grass coverage and …

Populism And Its Effect On International Business Strategy, Julio Cesar Martinez Suarez

Theses and Dissertations

This dissertation investigates the complex relationship between populism and international business strategy, with a particular focus on how populist mobilizations influence firms' location decisions and strategic planning. As populism continues to shape political dynamics globally, it presents significant challenges for businesses operating in or considering entry into markets governed by populist regimes. Utilizing institutional theory, this study examines the distinct political risks associated with populism, including anti-establishment ideology, the weakening of democratic institutions, and a tendency toward short-term, reactive policymaking. The research explores the consequences of these risks for firms, particularly in emerging markets, where populism often exacerbates uncertainty and …

Using Improvement Science To Study The Influence Of A Self-Regulatory Skills Intervention Program Within The Pre-Referral/Student Study Team Process, Abbie Sian-Stirone

Theses and Dissertations

The Dissertation in Practice (DiP) details a continuous improvement study utilizing Improvement Science and Plan-Do-Study-Act (PDSA) cycles to refine a school site's pre-referral/Student Study Team (SST) process. The need for this systemic refinement was driven by reported district-level equity concerns regarding the overrepresentation of Latinx students in special education. The study investigated the influence of a targeted Self-Regulatory Learning (SRL) Intervention Program, which leveraged an SRL Reflection Tool to teach explicit metacognitive and self-management strategies to Latinx students identified as at-risk of special education referral. Conducted in an urban public intermediate school, the research employed qualitative and quantitative data to …

Enhancing Engagement And Learning In Radiology: Integrating Game-Based And Case-Based Learning In Medical Education, Lisa Willson

Theses and Dissertations

The purpose of this mixed-methods action research is to integrate game-based learning (GBL), specifically an educational escape room, into case-based learning (CBL) and evaluate its impact on the engagement and academic performance of fourth-year medical students in an elective radiology course at a medical school in the southeastern United States. Sixteen students participated in the study; all identified as white. National trends indicate a significant decrease in student engagement and academic performance across various educational settings, including medical education (Kay & Pasarica, 2019). Locally, this trend is reflected in declining test scores and student feedback indicating disengagement and poor retention …

Unlocking The Power Of Connection: Engagement And Communication With Limited/ Non English Language Families, Melinda Hope Burnette

Theses and Dissertations

Family engagement can positively impact a student’s academic performance, attendance, literacy, and behavior at school (Bachman et al., 2021; Garbacz et al., 2018; Houri et al., 2019; Karge & Lansky, 2011; Robinson et al., 2022). However, there are several barriers to school-family communication, including additional responsibilities outside the school setting and socioeconomic factors. Parents and families who have limited/no English literacy skills face additional barriers to participation because of the lack of language support from schools in communicating events, providing access to language support at events, and parent perceptions of school acceptance (Arellanes et al., 2023; Perrigo et al., 2022; …

Enhancing Teacher Self-Efficacy In Ngss Storyline Implementation: A Mixed Methods Action Research Study On Professional Development In Middle School Science Education, Dena Spickard Fender

Theses and Dissertations

This mixed-methods action research study examined how professional development (PD) influences middle school science teachers’ self-efficacy in implementing the Next Generation Science Standards (NGSS) Storyline curriculum. The study also explored which aspects of PD are most effective in supporting teachers at different career stages. Teacher self-efficacy is a critical factor in the successful adoption of reform-based science instruction, yet limited research has investigated how PD can be differentiated to address the needs of novice, intermediate, and veteran educators in underperforming schools.

A convergent mixed-methods design was employed to collect both quantitative and qualitative data. The Science Teaching Efficacy Belief Instrument-A …

Exploring Student Perceptions Of Culture Within An Algebra Unit: A Qualitative Action Research Study, Alesha Marie Love

Theses and Dissertations

Many barriers exist when teaching and learning mathematics. Although the mathematics curriculum is rigid and rigorous by design it is often not culturally relevant for the students engaging with the content. As a result, many students of color do not have an appropriate amount of representation to connect to a subject area that already seems exclusionary. This qualitative action research study examines the effects of introducing culturally relevant references into an Algebra unit for students of color, exploring the influence of exposure to cultural references and the minimal display of cultural and racial identities within the mathematics curriculum on students …

Too Much Of A Good Thing? Can Students Be Too Behaviorally Engaged, Rosemary Louise Odem

Theses and Dissertations

Student engagement in school is a key determinant of students’ academic success. Student engagement is commonly conceptualized as a meta construct comprised of three dimensions: emotional, cognitive, and behavioral engagement (Fredricks, 2015). Behavioral engagement, the focus of this study, is defined by positive conduct, involvement in learning and academic tasks, and participation in school-related activities (Fredricks et al., 2004). Some researchers have suggested that psychological strengths, like engagement, can be overused and result in maladaptive consequences (Niemiec, 2019; Oishi et al., 2007). This study addressed this notion using archival data from a sample of 422 students from one Southeastern US …

The Church As An Ecological And Cultural Anchor: Examining Its Role In Gifted Education, Advanced Academic Access, And Educational Equity, Matrissa Bennett

Theses and Dissertations

This action research study examines the role of the Black church as an ecological and cultural anchor in addressing the inequities of gifted education and expanding access to advanced academic opportunities for Black students. The study is grounded in Bronfenbrenner’s ecological systems theory, critical race theory, and racial and ethnical socialization, and it explores how the Black church can support student development, empower parental advocacy, and partner with schools to promote educational equity. Conducted at Mountain Valley Baptist Church in South Carolina, the interventions included student mentoring, goal setting sessions, academic enrichment, emotional support initiatives, a parent workshop, and a …

Strategies For Developing Mathematical Identities In Middle School Students, Margaret M. Stevens

Theses and Dissertations

This concurrent mixed-methods action research study investigated the impact of mathematical discourse intervention on seventh-grade students’ mathematical identities and understanding. Twenty students participated in a four-week intervention implementing Smith and Stein’s (2018) five practices plus one framework.

Quantitative results showed curriculum-based assessments improved significantly (p < .001, d = 1.64). State mathematics assessment revealed minimal change in mean scores. The Mathematical Identity Questionnaire revealed positive shifts across all five constructs, with largest gains in Mathematical Initiative (+0.40) and Problem-Solving Persistence (+0.30). Qualitative analysis using Bingham’s (2023) five-phase process revealed three themes: Mathematical Voice Development, Identity Transformation Through Competence Building, and Communal Validation. Social Cognitive Theory and Culturally Relevant Pedagogy integration showed how discourse interventions addressed both individual self-efficacy and systemic inequities. Findings suggest intensive discourse intervention can initiate positive changes in mathematical identity and understanding for struggling students. Implications include restructuring mathematics instruction to prioritize student discourse and voice, creating more equitable learning environments.

Investigation Of Metals And Incidental Nanomaterials In Wildland-Urban Interface Fire Ashes And Their Impacts On Marine Phytoplankton, Talal Abdullah Alshehri

Theses and Dissertations

Wildfires are natural processes that have played a vital role in ecosystems for millions of years. However, with increasing anthropogenic activities and climate change, wildfires' frequency and intensity have increased. A wildfire is an uncontrolled fire that burns forests, grasses, and savannas. In addition to vegetation combustible materials, wildfire burn structure items such as homes, stores, and storage sheds in areas where the transition zone between urban and wildland is defined as the wildland-urban interface (WUI). Moreover, wildfires in WUI can burn vehicles, including automobiles, tractors, and boats on trails. Recently, there have been concerns regarding the metals, metalloids, and …

Gut Microbiome Dynamics In Heart Failure And The Therapeutic Potential Of Nmeg-Cgrp, Kamryn Michael Gleason

Theses and Dissertations

Heart failure (HF) is increasingly recognized as a multisystem disease often linked to gut dysbiosis; however, its specific effects on gut microbial composition remain poorly understood. This study examined long-term changes in the gut microbiome in a murine HF model induced by transverse aortic constriction (TAC) and evaluated the effects of NMEG-CGRP. TAC mimics pressure overload-induced cardiac dysfunction, replicating key features of HF. CGRP, a neuropeptide with vasodilatory and cardioprotective effects, shows potential as a therapy for HF but is limited by rapid degradation. A stabilized analog, NMEG-CGRP, was used to assess its impact on cardiac and gastrointestinal health. Mice …

Parental Attitudes And Expectations Regarding Piano Study For Their Children With Autism Spectrum Disorder, Lin Zhong

Theses and Dissertations

This study investigates parental attitudes and expectations regarding piano study for children with Autism Spectrum Disorder. Although music has been recognized for its therapeutic and educational benefits among individuals with ASD, research examining these outcomes from the perspective of parents has been limited. This study focuses on in-depth interviews with nine parents of children with ASD enrolled in the Carolina LifeSong Initiative, a specialized piano program serving students with diverse developmental disorders.

The interviews explored parents’ motivations for initiating piano study, expectations for both musical and non-musical outcomes, and observations of their children’s growth and challenges through music. Parents reported …

Spectral Modeling Of Electromagnetic Radiation From Power Converters, Regan A. Varner

Theses and Dissertations

Switching power converters are increasingly utilized in contemporary electronics. They are becoming more compact and operate at higher frequencies, which contributes to radiated electromagnetic interference (EMI). This EMI is important to quantify for electromagnetic compatibility of the converters with other nearby systems. In this thesis, analytical models have been developed for both ideal and non-ideal switching waveforms, employing piecewise functions to describe time-domain waveforms, with their corresponding frequency spectra derived and compared to empirical spectra. The results demonstrate that the comparisons with measured frequency data exhibit agreement with the analytical models up to approximately 25 MHz. Additionally, our analysis indicates …

Predictors Of Outpatient Follow-Up Attendance And Subsequent Psychiatric Readmission, Sandra J. Beltran

Theses and Dissertations

Psychiatric readmissions remain a persistent challenge in mental health care, often reflecting gaps in continuity of treatment following discharge. The Agency for Healthcare Research and Quality (2019) indicated that a key component in preventing inpatient readmission is adequate outpatient care following discharge. Moreover, early attendance in outpatient follow-up visits is associated with improved patient outcomes (Boston Medical Center, 2022). Various predictors are associated with engagement in outpatient services, such as age, medication compliance, and socioeconomic variables (Carson et al., 2014; Li et al., 2005; Marino et al., 2016; Stubbs et al., 2024).

The present study sought to determine whether psychiatric …

The Moderating Effects Of Community Involvement On The Association Between Witnessed Community Violence And Mental Health Outcomes Among Black Adolescents, Curtisha Tamara Shacklewood

Theses and Dissertations

Black youth and adolescents are at a disproportionately high risk for experiencing community violence exposure (CVE) and the potential influence it may have on psychological functioning. Research posits that Black youth who experience community violence are at a significantly higher risk of experiencing elevated internalizing symptoms (e.g., depression) and externalizing symptoms (e.g., delinquency). Previous research has utilized the ecological model to investigate interpersonal protective factors that potentially buffer the effects of CVE, including parental support and family characteristics. However, there is little research that explores community-level factors, such as community activities (e.g., youth activities and parental perception of collective efficacy) …

Developing A Dynamic Bilingual Space In An Early Childhood Korean Heritage Language Classroom Through Multimodal Translanguaging Pedagogy, Kyungjin Hwang

Theses and Dissertations

Drawing on translanguaging theory and multimodal literacy, this dissertation examines how a multimodal translanguaging pedagogy can create a dynamic bilingual space in a Korean heritage language classroom in the southeastern United States. Using a teacher-research design and thematic analysis of classroom video recordings and student artifacts, the study explored ten instructional modules with Korean-American children aged five to six. It first identified the core components of the pedagogy, its framework, curriculum content, and teacher strategies, and then analyzed how children flexibly used Korean and English across modes such as speaking, writing, and drawing. Findings revealed diverse translanguaging forms and functions. …

The Impact Of Project-Based Learning On Future First Generation College Students’ Oral Communication Skills, Presentation Skills, Confidence Levels, And College And Career Readiness, Mandana Marashi

Theses and Dissertations

The purpose of this action research was to evaluate the impact of a project-based learning innovation course on high school students’ oral communication, presentation skills, confidence levels, and college and career readiness in a college and career readiness program housed at a university in the Mid-Atlantic region. Effective oral communication and presentation skills have been continuously emphasized by national organizations and employers to be critical skills for success in students’ academic and professional lives. However, teaching oral communication and presentation skills to high school students has been neglected, which has negatively affected students’ college and career readiness, particularly for students …

Unveiling Caulocovert: Conserved Phage And Gene Transfer Agent In Caulobacter, Talia Neco

Theses and Dissertations

Bacteriophage play an important role in bacterial evolution, population control, and horizontal gene transfer within microbial ecosystems. This study focuses on the discovery and characterization of Caulocovert, an active bacteriophage identified in multiple Caulobacter strains. Using genome annotation tools such as Artemis and Mauve, we identified multiple key phage genes, including the major capsid protein, head-tail connector, portal protein, and major tail protein. These phage genes are present in CB13 and several other strains, such as C. vibriodies CB15 and CB2, C. segnis CBR1, Caulobacter sp. FWC26, and the distantly related Caulobacter sp. D5 strain. The location of these genes …

Influence Of School Climate On Comprehensive School Behavioral Health Effectiveness, Halle Rose Singer

Theses and Dissertations

Youth are experiencing a sharp rise in mental health concerns, which have reached critical levels. Schools have emerged as a key setting for delivering mental health services due to their accessibility, familiarity, and capacity to reach diverse populations. Comprehensive School Behavioral Health (CSBH) systems offer a multi-tiered, evidence-based framework for supporting the mental health of all students. However, the success of CSBH interventions varies across schools presumably indicating that systemic or school level factors, like school climate, may influence youth mental health outcomes. In this study, I investigate how school-level factors, specifically student-perceived school climate, influence the mental health outcomes …

Investigating The Influence Of Instructional Strategies On The Development Of Procedural And Conceptual Knowledge In Advanced Algebra Ii Students, Maura Frances Yinger

Theses and Dissertations

This mixed-methods action research study investigated the influence of instructional strategies shown to improve students’ procedural and conceptual understanding in a rational expressions and equations unit in Advanced Algebra II. The instructional strategies used in the study include comparing, self-explaining, and exploring before instruction. The students (N=27) completed a pre-test and a post-test, both of which were followed by questions asking students to justify their responses on two questions. All students also responded to six digital self-explanation journal prompts. Randomly selected students were placed into three homogenous groups to participate in performance task observations. Analysis of the data …

​​​Creating A Resident And Fellow Scholarly Activity Tracking Tool In A Large Academic Health System: A Dissertation In Practice​, Elyse Anne Wieszczecinski

Theses and Dissertations

Documenting and reviewing resident and fellow scholarly activity within a sponsoring institution can be a laborious task. With multiple lines of information coming from a wide variety of sources, this problem of practice implemented the Information Systems Success Model to help develop a database by which this information can be collected in a way that is efficient while maintaining the need for a user-friendly product. While other healthcare entities have also incorporated this model into their scholarly activity collection, these are still individual needs of the sponsoring institution and its constituents to consider when adapting the strategy. Using an improvement …

Journey To Proficiency: The Impact Of Explicit Problem-Solving Instruction In A Fifth-Grade Math Classroom, Brittany J. Terry

Theses and Dissertations

This action research study examined the impact of explicit problem-solving instruction on fifth-grade students’ mathematics proficiency and attitudes across skill levels. At the outset, students relied on rote procedures rather than conceptual reasoning, limiting their ability to apply skills in new contexts or understand why procedures work. Grounded in constructivist and sociocultural learning theories, the study aimed to move students beyond procedural fluency through explicit instruction of problem-solving strategies, modeling, guided practice, collaboration, and reflection. Over 8 weeks, 32 students participated in daily lessons. Findings from pre–post assessments, interviews, and portfolios indicate that explicit problem-solving instruction supported measurable growth in …