Digital Commons Network^™

How Can Learning Management Systems Positively Impact Student Engagement In Online Courses?, Jerald P. Wilson

Electronic Theses and Dissertations

The topic of this dissertation is learning management systems, specifically Canvas. Research has proven that student engagement is a strong factor in student achievement in both online and inperson courses. The COVID-19 pandemic highlighted a deficit in instructors’ ability to acquire and maintain student engagement in online courses. This study details why this problem exists and how instructors have successfully addressed it in higher-level online courses. The primary purpose of this qualitative descriptive study was to examine how learning management systems, specifically Canvas, can increase student engagement in online courses in higher education. Qualitative research was the chosen paradigm for …

Addressing The Problems Of Data Variations, Quality, And Scarcity In Training Deep Neural Networks, Jian Sun

Electronic Theses and Dissertations

The performance of deep neural networks (DNNs) is strongly influenced by the characteristics and quality of the underlying datasets. This Ph.D. dissertation addresses three pervasive data challenges-imbalance, quality degradation, and scarcity-that commonly hinder the effectiveness of DNNs in computer vision (CV) and natural language processing (NLP) applications.

Class imbalance remains one of the most frequent causes of degraded model generalization. While Focal Loss effectively mitigates inter-class imbalance by assigning higher weights to minority classes, it struggles with intra-class imbalance, particularly in video datasets where longer clips dominate feature representation. To address this, I implement and utilize …

Contribution Of G4 Structure To Alzheimer’S Disease And Tau Pathology, Lena Michaela Kallweit

Electronic Theses and Dissertations

The occurrence of Alzheimer’s Disease (AD) is rapidly increasing as our global population ages. With the majority of therapeutic drugs in the last couple of decades failing clinical trials, new molecular targets are needed to combat the expected influx of new AD cases. AD pathogenesis is associated with abnormal protein aggregation, characterized in part by intracellular accumulation of hyperphosphorylated tau (p-tau) in neurofibrillary tangles (NFTs). RNA has been identified as a major non-proteinaceous component of NFTs and has been implicated as an active cofactor in tau aggregation and spread. Recent work has shown that aggregates from AD brains contain almost …

Critical Roles And Critical Rolls: A Frame-Analytical Perspective Of Self-Making, Safe Spaces, And Worldbuilding In Tabletop Role-Playing Games, Cal Quayle

Electronic Theses and Dissertations

Many gamers prefer to play tabletop roleplaying games, or TTRPGs, in order to a) join a community, and b) tell a story collaboratively with friends and acquaintances. This thesis discusses selfhood-making, safe spaces, and allegory in imaginary worlds from the perspective of Erving Goff man’s frame analysis. It relies on a theoretical framework of imagined communities, the magic circle, and subcreation. This research culminated in the understanding that people play TTRPGs for a variety of reasons - collaborative storytelling and exercising critical thinking skills, but respondents overwhelmingly reported that they enjoyed the ability to socialize with friends and strangers, and …

Problematizing The Critical Dimensions Of Whiteness With Educational Leaders, Lerita Yvette Cavness

Electronic Theses and Dissertations

This action research examines whether and how whiteness is “weaponized” by a P-12 educational leader, the impact whiteness has on their identities, and whether engagement with Critical Whiteness Studies (CWS) will increase pro-equity behaviors. The research employs a layered mixed-methods approach, and a deductive analysis triangulation plan framed by the Critical Dimensions of Whiteness Model (CDWM). This N-of-1 case study included a four-phase intervention workshop series and one post interview. The findings identify how one educational leader engaged in the selfweaponization of whiteness. The findings identify that CWS supported by the CDWM is a disruptive but healing path to awareness …

Intersecting Identities: The Leadership Journeys And Challenges Of Black Women Senior Leaders In Southern U.S. Predominantly White Institutions, Quizanae' Yvonne Cooper

Electronic Theses and Dissertations

This study looked at what Black women in high‑level leadership roles are experiencing at predominantly White institutions in Texas and Florida now that diversity, equity, and inclusion (DEI) policies have been rolled back. Using Black feminist theory and intersectionality as the foundation, the research focused on how race and gender shape their leadership, their decision‑making, and the ways they navigate their careers. Through in‑depth interviews with 10 Black women in executive positions, the study uses a narrative approach to understand their stories. Eight major themes emerged, and many participants explained that losing DEI initiatives created new obstacles, reduced support systems, …

Exploring The Lived Experiences Of Black Women In Undergraduate Stem Core Expansion Pathways, Lizzie L. Evans Martinez Alvarez

Electronic Theses and Dissertations

The use of social incongruence in the film Hidden Figures, which juxtaposed with STEM education as the most powerful in contrast with Black women as the least powerful, supported the argument for the specific problem of practice to examine the unmet need for socially and ethnically diverse student populations in U.S. STEM higher education and careers. The purpose of this hermeneutic phenomenological research study was to identify and analyze the lived experiences of Black women regarding barriers they perceive in the STEM educational and career decision-making processes, while exploring transformational pathways to STEM academic success. The study specifically analyzed …

Texas Secondary Spanish Teachers’ Perceptions Of Factors Influencing Instructional Self- Efficacy, Satisfaction, And Effectiveness, Tana Verlane Palafox

Electronic Theses and Dissertations

Ongoing shortages of certified world language teachers and declining enrollment in secondary language programs have intensified concerns about teacher burnout, professional isolation, and instructional quality. Research has indicated that collaboration, targeted professional development, and supportive leadership influence teachers’ instructional self-efficacy, job satisfaction, and instructional effectiveness. However, limited research has examined how secondary Spanish teachers in Texas experience these issues. This qualitative collective case study explored how Texas secondary school Spanish teachers perceive the impact of their professional experiences on instructional self-efficacy, job satisfaction, and instructional effectiveness. Grounded in Bandura’s social cognitive theory and Vygotsky’s social constructivism, the study examined how …

Managing The Mood: How Managerial Communication Shapes The Experience Of Emotional Labor Among Restaurant Employees, Brynn Olverson

Electronic Theses and Dissertations

Restaurant work is emotionally demanding work for servers and bartenders. Organizational Support Theory (Eisenberger et al., 1986) suggests that employees’ perceptions of their organizations’ support can bolster the negative side effects of such work. However, past instruments used to measure these perceptions do not distinguish between types of emotional experience, nor separate perceptions of emotional support from other forms of support. Likewise, OST notes that supervisors play a key role in influencing perceptions of organizational support, but more work is needed to determine specific communicative behaviors that can increase perceptions of organizational support. The study at hand proposes that managers' …

The Fertilization President: A Rhetorical Analysis Of The United States’ Rebirth Of Pronatalism, Kara Vetch

Electronic Theses and Dissertations

The United States experienced one of the lowest birth rates in decades in 2024 and has been blamed by policymakers for poor economic and societal outcomes. To combat this, President Donald Trump signed an executive order to encourage healthcare insurances to lower the cost of fertility treatments. Policies encouraging more births align with pronatalist ideologies, the belief that higher national birth rates are better for society. Furthermore, Vice President JD Vance and social media influencers, Malcolm and Simone Collins, have built a strong resurgence of pronatalist ideologies through public addresses and interviews long before Trump’s executive order. For an in-depth …

Computational Modeling Of Biophysical Transport: Respiratory Drug Delivery And Tissue-Level Physics, Md Tariqul Hossain

Electronic Theses and Dissertations

The nasopharynx, the upper part of the pharynx located at the back of the nose serves as a critical hotspot for initial respiratory infections via inhaled transmission, largely due to the presence of specific surface receptors that pathogens can exploit for cell invasion, combined with a relatively sparse local mucociliary substrate. To enhance the therapeutic efficacy against certain pathogens, such as the SARS and Influenza viruses, it is therefore essential to improve the targeted delivery of drugs to the nasopharynx. This study explores the use of intranasal sprays as a method for drug administration and models the transport of sprayed …

Cyber Security Related To Agricultural Data Encryption Using Edge Computing Devices, Mohammad Ashik Alahe

Electronic Theses and Dissertations

Smart Agriculture increasingly relies on image-based sensing, edge computing, and artificial intelligence to support data-driven decision-making in modern farming systems. While these technologies improve productivity and resource efficiency, they also introduce significant cybersecurity risks, particularly agricultural images transmitted and processed in real-time on resource-constrained edge devices. Unauthorized access, data manipulation, and interception of image data can lead to incorrect agronomic decisions and severe economic consequences. Despite this risk, efficient and practical cybersecurity solutions for real-time agricultural imaging remain limited. This study addresses these challenges by developing and evaluating encryption-based cybersecurity frameworks tailored for real-time agricultural image protection on edge computing …

Personalized 3d-Printed Tablets For Diabetes And Related Complications: Design, Optimization, And Evaluation, Thirupathi Reddy Anekalla

Electronic Theses and Dissertations

This study aimed to explore potential use of pneumatic-based thermoplastic 3D bioprinter to create personalized tablets in a single-step process. In investigates the development of a single pill containing two model drugs: Metformin HCl (a highly soluble drug) for extended-release and Atorvastatin Calcium Trihydrate (a low-solubility drug) for immediate release with enhanced solubility. To achieve this, Eudragit RSPO as extended-release polymer and Polyethylene Oxide (PEO N10) as immediate release polymer was used, and the tablets were fabricated using Direct Powder Extrusion (DPE) Technology with pneumatic-based thermoplastic print heads. Key processing parameters, such as nozzle printing speed, infill density, printhead temperature, …

Defending Darnassus: Self-Disclosure Between Characters In World Of Warcraft, Molly Peterson

Electronic Theses and Dissertations

This study examined why players substitute physical contact with people for virtual contact with people, why players engage in self-disclosure, and how they interact with other players. A content analysis analyzed data collected from an online questionnaire. Using data from 125 questionnaires, the research gathered information on why players self-disclose within the game World of Warcraft and if they have experienced any advantages or disadvantages from those interactions.

The Impact Of Communication Satisfaction On Division I Student Athletes, Gabriella Gnewuch

Electronic Theses and Dissertations

Communication satisfaction is vital for the motivation, retention, and interpersonal success of collegiate student-athletes. While coaches play a pivotal role in the athletic experience, current literature focuses predominantly on head coaches, leaving a significant gap regarding the influence of assistant coaches. This study utilized Confirmation Theory, comprised of the dual dimensions of acceptance and challenge. The study examined how these communication behaviors impact student-athlete satisfaction at the Division I level. A census was conducted among Division I student-athletes at South Dakota State University using the Coach Confirmation Instrument (CCI) and the Student Communication Satisfaction Scale (SCSS). Quantitative results from multiple …

New Era Of Academic Advising: Integration Of Artificial Intelligence Within Academic Advising By, Rachel Elaine Schmitz

Electronic Theses and Dissertations

Academic advising is a critical component of student success, directly impacting institutional retention, GPA, and student autonomy. This thesis explores the transition of this profession into my proposed fifth era characterized by the integration of Artificial Intelligence (AI) as a supportive tool, rather than a replacement, for human connection. Grounded in Peplau’s Interpersonal Relations Theory (IRT), this study examines advisors’ perception of how advanced technology can impact the interpersonal process between students and advisors. A qualitative methodology was used, consisting of seven (N = 7) semi-structured interviews with professional advisors at South Dakota State University. Thematic analysis revealed that AI …

Production Of Fungal Biomass And Crude Chitin From Cheese Whey: Effects Of Whey Type And Lactose Hydrolysis On Aspergillus Niger And Trichoderma Reesei, Anye Catharine Nora Drum

Electronic Theses and Dissertations

Chitin is a biodegradable and biocompatible biopolymer with broad applications in the food, biomedical, pharmaceutical, and packaging industries. Conventional chitin production from crustacean shells is associated with seasonal availability, intensive chemical processing, and environmental concerns, creating interest in more sustainable alternatives. Filamentous fungi represent a promising source of chitin because of their rapid growth and ability to utilize low cost agro-industrial residues. This study evaluated the feasibility of producing fungal biomass and crude chitin from cheese whey through submerged fermentation while investigating the effects of whey type and enzymatic lactose hydrolysis on fungal growth, substrate utilization, and wastewater remediation. Aspergillus …

A Framework For Reliable Domain Ai: Knowledge-Grounded Data And Logic-Graph Reasoning, Yangxiao Bai

Electronic Theses and Dissertations

Large language models (LLMs) perform well on general tasks, yet their deployment in specialized, high-stakes domains such as public health remains unreliable. Models hallucinate facts, combine multi-step evidence incorrectly, and retrieve context that corrupts downstream reasoning. Three root causes underlie these failures: training data that underrepresents rare but critical domain themes, reasoning that is opaque and unverifiable, and evidence use that cannot be re-checked when the evidence changes. This dissertation addresses all three. First, we introduce HDBSCAN_SSA, a coarse-to-fine topic-modeling pipeline that couples density-based clustering with a novel Semantic Seed Aggregation algorithm. Using samples drawn from a larger corpus of …

Impacts Of Management Practices And Soil Properties On Free-Living Nitrogen Fixation In Eastern South Dakota, Laura Galvan Nuevo

Electronic Theses and Dissertations

Free-living nitrogen (N) fixation (FLNF) may represent a sustainable pathway to supplement crop N demand in agroecosystems, yet edaphic and management factors regulating this process under field conditions remain poorly understood in the Northern Great Plains. Using 15N2 direct method to quantify potential FLNF (pFLNF) and baseline FLNF (bFLNF), this thesis investigates how crop rotations (2-, 3-, and 4-year systems), tillage management (conventional vs. no-till), cover cropping, and soil properties affect the potential of free-living diazotrophs to supply N via FLNF in a long-term no-till corn-based system in Southeastern South Dakota. A two-year field study evaluated pFLNF across four growing …

Primary Avian Tracheal Cell Models For The Isolation Of Emerging Avian Metapneumovirus Strains, Tricia Serrao

Electronic Theses and Dissertations

The emergence of avian metapneumovirus (aMPV) subgroups A and B in the United States poultry industry has created an urgent need for standardized, host-specific diagnostic platforms. Historically, reliance on continuous, multi-species cell lines has limited the primary isolation of field strains and introduced potential adaptation artifacts. To address these challenges, this research first established and characterized a reproducible primary cell culture system derived from the tracheal tissues of 1-day-old turkey poults. This system was maintained in an optimized DMEM/F-12 formulation supplemented with 5% FBS, EGF, and ITS, with early-passage cultures achieving 90% confluence within 24 to 48 hours. Morphological and …

Evaluating Planting Methods For Native Seed Production And Exploring Granivory In The Northern Great Plains, Allison Dollen

Electronic Theses and Dissertations

Temperate grasslands have faced immense losses due to land use change in the last 150 years and less than half of the overall grasslands that once covered North America remain today. A portion of historic and remaining U.S. grasslands are located within the northern Great Plains (NGP) region which is home to over 1,600 species of native plants and provides many ecosystem services and economic benefits. Initiatives to restore grasslands and their ecosystem services are currently underway, but barriers such as limited native seed supply and granivory hinder restoration efforts. My first chapter addresses knowledge gaps in planting methods for …

Improving Human Dimensions Of Conservation Planning: Challenges And Opportunities For Sustainable Conservation Outcomes, Vivian Hulugh

Electronic Theses and Dissertations

Conservation planning is important to ensure both ecological and social benefits of natural resources, including the maintenance of functional ecosystems and stable wildlife populations as well as the provision of resources that communities rely on. Yet, the integration of the human dimensions of conservation planning remains limited in practice. This thesis examines conservation planning in South Dakota and within Joint Venture (JV) partnerships, using qualitative methods to identify challenges and opportunities for more effective and coordinated planning. In chapter one, I examine how collaboration, public participation, and the use of climate information are integrated conservation planning in South Dakota and …

Feasibility Study For Lithium Mining In South Dakota, Neha Karna

Electronic Theses and Dissertations

The increasing demand for lithium in the battery manufacturing industry, boosted by the growth of electric vehicles and smartphones, has led to concern over its sustainable supply chain in the United States. Historically, South Dakota has played a significant role in U.S. lithium production. The recent surge of interest in lithium exploration in South Dakota, specifically Black Hills, underscores the importance of evaluating the feasibility of lithium mining in Black Hills. This research aims to study the economic feasibility of a lithium mining operation in Black Hills, South Dakota. Our specific objective is to estimate cut-off grade using Lane’s model …

Production, Characterization, And Diagnostic Application Of Monoclonal Antibodies Against The N-Protein Of Avian Metapneumovirus Subgroup B, Ravi Gupta

Electronic Theses and Dissertations

Avian metapneumovirus (aMPV) is a respiratory pathogen that causes Turkey Rhinotracheitis (TRT) in turkeys and Swollen Head Syndrome (SHS) in chickens. The infection leads to facial swelling, nasal discharge, reduced egg production, and poor growth. This virus is classified into four subgroups: aMPV-A, B, C, and D, with two other novel subgroups, in which aMPV-A, B, and C are most prevalent in the commercial flocks. In early 2024, aMPV-A and B outbreaks have been reported in the US, resulting in severe economic losses. An economic assessment estimates around $112 million in losses in Minnesota and up to $434 million in …

Towards Energy Access For All: Developing The Lived Energy Experience Index (Leei), Kentina Annie Ishimwe

Electronic Theses and Dissertations

Energy is the fuel that powers the engine of civilization. Energy access metrics ensure that nations continuously work towards providing access for all. However, the prevalent binary indicator fails to consider that energy needs to be usable, accessible, affordable, and reliable. As a result, numerous tiered and multidimensional metrics, such as the Multi-Tier Framework, came about to bridge the gap but proved to be complex and complicated to implement. This study presents the existing literature review, assesses the limitations of current energy access measurement frameworks, and compares household energy needs with reported access statistics. Based on the findings, the Lived …

Assistant Principals’ Perspectives And Experiences Concerning Their Influence As Instructional Leaders On Student Achievement In Title I Schools, Courtney J. Charles

Electronic Theses and Dissertations

Abstract

This qualitative descriptive study explored the perspectives and experiences of assistant principals in Title I schools in the context of their instructional leadership responsibilities. The study examined the relationship between assistant principals as instructional leaders in Title I schools and student achievement by addressing research questions related to curriculum implementation, data-driven decisions, school culture, instructional support, and professional development. Moreover, this study used purposeful sampling to select 13 assistant principals from Title I schools, and data were collected through semistructured interviews and analyzed using thematic analysis. Marzano’s focused school leader evaluation model served as the framework for interview questions. …

The Impact Of Synchronous And Asynchronous Preference On The Performance Of Distance Learning Students, Christopher A. Wilson

Electronic Theses and Dissertations

Distance learning is a growing part of education. The transition to distance learning was underway at higher education institutions, but the COVID-19 pandemic forced institutions of all types to rapidly transition to distance learning. The technology that was adapted during this emergency distance learning remained in the classroom once normal instruction resumed. This quantitative study examined two aspects of distance learning technology in education. The study examined student preference for either synchronous or asynchronous instruction through the framework of expectancy theory. Students who were more familiar with the course material were hypothesized to have a higher expectation of success and …

Faculty Perceptions Of Engaging Generation Z Students Through Positive Education In The Classroom, Ashley D. Ragsdale

Electronic Theses and Dissertations

This qualitative study examined the engagement gap between Generation Z students and faculty in higher education, emphasizing how positive education approaches can help faculty become more confident and effective instructors. Generation Z students prefer instant internet access and digital learning, have shorter attention spans, and tend to be disengaged when instructors rely on traditional teaching methods. After the COVID-19 pandemic, this engagement gap became more evident. This basic qualitative study used semistructured interviews, reflexive journaling, and nonparticipatory observations. Participants included full-time health science faculty at a private university in central Texas. Each had at least 2 years of teaching experience …

Mind The Gap: Intergenerational Perspectives On Mental Illness Within Ghanaian American Communities, Ama Danso-Ayesu

Electronic Theses and Dissertations

This research explores attitudes toward mental illness among Ghanaian immigrants and

first-generation Ghanaian Americans, with particular focus on factors that influence

stigma. Guided by Bronfenbrenner’s Bioecological Model, the study utilized the

Community Attitudes Toward Mental Illness (CAMI) Scale to measure four dimensions

of stigma, including authoritarianism, benevolence, social restrictiveness, and community

mental health ideology. A comparative, cross-sectional design was employed to examine

differences between immigrant and American-born participants. The findings revealed

generational differences where Ghanaian immigrants reported higher levels of

authoritarian and socially restrictive beliefs, while first-generation Ghanaian Americans

demonstrated more benevolent and inclusive attitudes. Interpreted through the ecological

systems …

Likes For Love: Examining The Relationship Of Sociocultural Factors On Social Media Influences Of Instagram Use For Young Black Women, Cheria S. Jackson

Electronic Theses and Dissertations

In recent years there has been a push toward studying ethnic minority women related to the psychological implications of image and beauty, as historically the focus has been on the experiences of European women (Awad et al., 2015). Black women must process sexual development, attitudes, and behaviors through the lens of the sexual scripts and stereotypes of their ethnic group and must negotiate between mainstream and culture specific norms of sexuality (Daniels and Zurbriggen, 2016; Jerald et al., 2017). The presence of these scripts signifies a difference between Black women and other races about how they may internalize and react …