Digital Commons Network^™

Knowledge Diffusion In Networks Of Artificial Learners, Ehsan Beikihassan

Dissertations

The dissertation draws inspiration from the topic of peer learning in the social sciences and the study of information dissemination and knowledge diffusion in network science. In particular, it introduces and studies a setting involving a population or network of artificial learners, with the objective of optimizing aggregate performance measures under constraints on training resources. In this context, natural knowledge diffusion processes in networks of interacting artificial learners are studied. The term "natural" refers to processes that emulate human peer learning, where the internal state and learning processes of students remain largely opaque, and the main degree of freedom lies …

Interactive Visualization Workflows For Mitigating Analytical Uncertainty, Kaustav Bhattacharjee

Dissertations

This dissertation takes a process-centric and stakeholder-first perspective for handling analytical uncertainty: the form of uncertainty that confronts data analysts' insight-generation processes in high-consequence decision-making scenarios. The cost of an incorrect decision when data is used for movie recommendations as opposed to when personal data is used to drive insights or when data-driven modeling is used to drive real-time decisions for maintaining the health of a grid are vastly different in terms of consequences. This dissertation looks at analytical uncertainty in two real-world scenarios: i) how sensitive information leakage can be prevented during the open data release process with data …

Decomposition Of Diisopropyl Methylphosphonate (Dimp) Exposed To Elevated Temperatures And Combustion Products Of Reactive Materials, Elif Irem Senyurt

Dissertations

The safe and efficient destruction of chemical weapon agents (CWAs) stockpiles remains a critical global challenge. Understanding the thermophysical properties, decomposition mechanisms, and interactions of CWAs with their environment is crucial for developing effective strategies to mitigate their threats. Diisopropyl methylphosphonate (DIMP) and Dimethyl methylphosphonate are commonly used nerve agent surrogates. This dissertation focuses on DIMP and DMMP, investigates their properties and behavior under conditions relevant to prompt defeat scenarios.

The thermophysical properties of DIMP and DMMP were experimentally characterized, including vapor-liquid surface tension (3-60 °C) and viscosities of neat and aqueous solutions. Results revealed significant non-ideal behavior in aqueous …

Crowd-Sourced Learning For Computer Graphics Applications, Yunhao Zhang

Dissertations

Computer Graphics (CG) revolves around virtual content creation using computational methods, spanning applications from games to visual effects. Typically, the creation of CG content is led by expert practitioners who guide computational algorithms towards satisfactory results. Thus, creating CG content often requires manual iterations encompassing algorithm design, parameter tuning, and aesthetic feedback. This work investigates how to leverage crowd-sourcing to streamline such creation processes, focusing on animation and simulation. In animation, a novel crowd-sourcing framework is proposed for combat animation, enabling users to analyze motion similarities, and retrieve matching motions using novel crowd-sourced motion features. Such features enable quantifying previously …

Beyond Average Effects In Education Research Syntheses: Explaining Heterogeneity Of Concept Mapping Research In Science Education Through Meta-Regression Modeling, Aaron Wenger

Dissertations

Contemporary education research seeks causal inferences in order to guide policy and practice. Often well-controlled quasi-experimental and experimental designs are used as they are very useful for supporting and contextualizing causal inferences. Nevertheless, individual studies, even high-quality, resource-intensive randomized controlled trials, are not able to establish generalized claims. Because primary studies vary over dozens of variables (e.g., grade, subject, duration) simply conducting additional primary studies cannot change this. Furthermore, the informal assessments of primary studies common in literature reviews are unable to resolve certain challenges (e.g., publication bias) that are described in the emerging field of meta-research. These challenges require …

Rethinking Safe Nurse Staffing In The Post-Covid Icu: A Comparative Analysis Of The Nurse-To-Patient Ratio And Mixed Model Approach For State Policies, Emilie A. Maxie

Dissertations

The coronavirus pandemic (COVID-19) led to an unprecedented surge in ICU admission, increasing the nurse-to-patient ratios and intensifying stress on ICU nurses. This prompted many nurses to leave bedside care, exacerbating the ongoing nursing shortage and creating unsafe working conditions. Fourteen states have enacted safe nurse staffing policies. California implemented a mandated nurse-to-patient ratio, while Massachusetts adopted a mixed model for ICUs that involves a ratio, nurse committees, and workload tools. In post-COVID, this raises the question of which state policy approach is more effective in retaining ICU nursing staff. Literature suggests a mixed policy may be more effective.

A Phenomenological Study To Determine How Expert Avid Teachers Use Collaboration To Strengthen Student Metacognition And Student Self-Efficacy And Determine When It Occurs, Megan Hernandez

Dissertations

Purpose: The purpose of this phenomenological study was to determine how expert AVID teachers from the California Central Valley describe the use of collaboration to strengthen student metacognition and self-efficacy and how they describe the evidence that indicates metacognition and self-efficacy are occurring.

Methodology: Five Central California school districts were chosen to conduct the phenomenological study on expert AVID teachers. One to two AVID teachers from each of the five school districts were chosen in the study for eight participants. The expert AVID teachers were chosen for having at least five years of experience teaching AVID and being up to …

A Latent Profile Analysis Of High-Risk Children's Problematic Sexual Behavior, Claudia Campbell

Dissertations

As research and intervention regarding children’s problematic sexual behavior (PSB) have broadly defined PSB, including all forms of developmentally atypical sexual behavior and all potential etiological factors, limited work to date has identified subtypes or unique patterns of PSB. The aim of the current study was to examine the presence of unique patterns of PSB and etiological factors among high-risk children utilizing latent profile analysis (LPA) based on children’s self-focused PSB, interpersonal PSB (IPSB), maltreatment factors, co-occurring symptoms, adaptive functioning, and family functioning. The present study included 689 8-year-old children (50.1% male, 50.2% Black) with potential PSB and their caregivers …

Nurse Educators' Perceptions Regarding Faculty Participation In University Governance, Janet J. Gross

Dissertations

The purpose of this descriptive study was to identify nurse educators' perceptions of faculty participation in university governance

More Than Just A Grade: Factors Influencing Secondary Students’ Engagement With Digital Feedback, Mandy Prior

Dissertations

The increasing use of technology in secondary education has shifted teacher feedback practices to digital environments. While digital feedback offers many promising affordances, the factors that influence how students engage with and use digital feedback are not well understood. Previous research indicates that digital feedback poses unique challenges for engagement. New paradigm feedback models seek to identify processes and actions that promote feedback engagement. However, these models require further study in digital and pre-higher education contexts. This qualitative single-case study investigated the factors influencing secondary students' engagement with digital feedback. Data included 24 student interviews conducted across four grade levels …

The Impact Of Verbal Discourse On General And Special Education Students In The Ninth Grade Algebra I Classroom, Lauren Raschen

Dissertations

The purpose of this research study was to determine if there was a difference in using verbal discourse methods in the Foundations of Algebra/Algebra I for the general and special education population.  This study was done in the collaborative classroom where the results of general education and special education students were compared.  The researcher also compared the results of the verbal discourse formative assessments to determine which type of verbal discourse made the greatest impact of conceptual understanding of mathematical operations using a quantitative study.  The data was collected for two formative assessments and compared using the multiple linear regression …

Examining The Relationship Between Textbook Formats, Students’ Self-Efficacy And Academic Performance In Higher Education, Anthony Eya

Dissertations

Ideally, educators would have sufficient data to understand how textbook formats (Ebook and Pbook) can transform negative student behaviors resulting from low self-efficacy to improve their academic performance (Alegre, 2014; Masa’deh et al., 2022). The problem driving this study is the lack of empirical data on the relationship between textbook format, student self-efficacy, academic performance, and behavioral factors that undermine student success in a self-regulated learning environment (Masa’deh et al., 2022). Also, there is a need for data that could inform strategies for solutions to poor student self-efficacy regarding textbook type and low academic performance (Alegre, 2014). This study used …

Going With The Flow: How Direct And Indirect Alterations To Streamflow Influence Headwater Fish Communities In The Southeast, Langston Haden

Dissertations

Streamflow has been deemed the “master variable” regulating riverine communities as it can influence the chemical, physical, and biological components of river systems. Anthropogenic changes have and will continue to alter streamflow through direct (e.g. road culverts) and indirect (e.g. climate change) processes. Understanding how these alterations impact riverine communities is essential for maintaining and restoring ecosystem properties like biodiversity. Our objective is to integrate ecological theory and conservation approaches to understand how direct and indirect alterations to streamflow influence freshwater fish communities within the biodiverse headwater streams of the southeastern U.S. In a test of a standardized barrier protocol …

Teacher Perceptions Of Students With Disabilities And Their Ability To Meaningfully Participate In An Inquiry-Based Mathematics Model, Lori Luthy

Dissertations

This study focused on a school district in the Midwest region of the United States, which implemented a new inquiry-based math curriculum for all kindergarten through fifth-grade students during the 2021-2022 school year. The purpose of this study was to determine elementary general education and special education teachers’ perceptions of students with disabilities and their ability to learn mathematics at high levels from inquiry-based instruction. Also, the implications of deficit thinking were investigated. In addition, end-of-the-year progress results were compared to determine if implementing an inquiry-based model of mathematics increased student achievement. The population for this study consisted of educators …

Impact Of Safety Training On Employee's Perceptions Of Organizational Safety Culture, Brooke Reid-Graves

Dissertations

Workplace safety and well-being are vital for all workers, regardless of their profession (Young et al., 2022). Studies show that providing employees with training focused on recognizing hazards and implementing safety practices is essential for reducing occupational risks (Namian et al., 2020; Rose & Rae, 2017). Research underscores the importance of fostering a positive organizational safety culture for risk reduction (Berry et al., 2020; Downey, 2019). Understanding the impact of safety training on shaping an organization’s safety culture is key to promoting safe working environments (Mahjoub, 2013).

This study utilized the perspectives of high school staff regarding safety training and …

Conceptual Understanding, Engagement, And Optimal Learning Moments With Problem-Oriented Project Learning In High School Physics, Catherine A. Howell

Dissertations

This research explored the effect of Problem-Oriented Problem Based Learning (POPL) on concept attainment and engagement in a high school physics class. While physics education remains a vital component of STEM education, secondary physics enrollment trails chemistry and biology. Issues contributing to physics’ reputation as a complex subject include prior misconceptions and the formulaic nature of pedagogy. Prior research indicated that active learning can challenge misconceptions and mitigate the sameness of instruction. POPL resides firmly in the active learning methodology of Project-Based Learning (PjBL). This study expanded the research by combining Physics, POPL, concept attainment, multiple components of engagement, and …

Exploring The Interplay Among Effort, Motivation, And Self-Efficacy In High School Mathematics And Act Math Achievement, Katrina Lightsey

Dissertations

This study examines the relationship between high school students' attributions of effort, motivation, and self-efficacy as they relate to ACT math scores. Despite the important role of standardized tests in determining college admissions, there has been little research conducted to determine how students feel about these attributions and how they relate to math grades and ACT scores. A total of 52 juniors and seniors from local high schools participated in this study, which was conducted over the summer through voluntary participation following email invitations. The study was designed to measure students' self-reported effort, motivation, and self-efficacy using a survey instrument. …

Investigating The Impacts Of Ai Integration On Workplace Well-Being, An Exploratory Case Study, Anezka Viskova-Robertson

Dissertations

In an era characterized by rapid technological advancement, organizations are grappling with the profound changes brought by the integration of artificial intelligence (AI). This study examines the impact of AI integration on workplace well-being, conceptualized as a key indicator of the health of an organization’s socio-technical system. Conducted over a four-month period, this research utilized an exploratory case study approach, collecting data from 35 participants across four distinct organizations. By employing a socio-technical systems perspective and the tripartite model of attitudes, the study investigates the intricate interactions between AI technologies and human factors within organizational contexts. The findings reveal that …

Artificial Intelligence, Machines, Devices, And Robots: Mobilizing Humanness And Intelligence In The American Techno-Landscape, Carlos A. Batres

Dissertations

This dissertation is an ethnographic inquiry of artificial intelligence (AI) in the techno-landscape of three major metropolitan areas in the United States. It traces the ways in which both experts and non-experts talk about their interactions with AI via machines, robots, and other devices, and how the ways in which people deal with AI-technologies have come to shape how we think about our own ways of going about doing things. The goal is to discern what the social ramifications of this technology may be as relationships and relations are formed betwixt and between people and artificially intelligent things.

The Price Of Precision: Significant Figures And The Student Experience, Ryan Michael Britt

Dissertations

For students pursuing careers in medicine and science, general chemistry is often viewed as a gatekeeper course. Students struggle with general chemistry for a variety of reasons, one of the most common being mathematical difficulties. Compared to other lower division STEM courses, mathematical computation in general chemistry represents a unique challenge for the student due to the special emphasis placed on reporting answers to the proper degree of precision using significant figure (SF) rules. Although these rules feature in nearly every undergraduate chemistry course, their impact on the student experience of learning chemistry has never before been studied.

The purpose …

Evaluation Of Joint Model Imputation Of Multilevel Models, Gabriel Owusu

Dissertations

Missing data is a pervasive challenge in research, particularly in studies involving multilevel models. When left unaddressed or handled poorly, missing data can reduce statistical power and introduce bias, undermining the validity of findings. Although multiple imputation has emerged as a preferred method for addressing missing data due to its ability to provide unbiased and efficient estimates, its application in multilevel modeling remains underexplored. This gap is particularly significant given the hierarchical nature of multilevel data, which requires specialized approaches to imputation. The purpose of the study is to evaluate the effectiveness of joint model imputation in handling missing data …

Sedimentary Characteristics Of Flood Deposits In Coastal And Fluvial Environments: Examples From Washover Fans (North Carolina, Usa) And Floodplain Deposits (Mississippi, Usa), Shara Gremillion

Dissertations

Extreme flooding from severe and prolonged meteorological events and / or overbanking rivers are some of the most deadly and expensive disasters globally, impacting millions of lives, the environment, and property. People living in vulnerable areas, such as near coasts and rivers, are the first to be impacted with effects of these flood hazards. Scientific studies and their results can aid communities and officials in planning and preparing for those flood impacts. In this three-part study, flood impacts from coastal storms in North Carolina, and flooding along the Mississippi River (MSR) in the state of Mississippi, USA are assessed from …

The Impact Of Restorative Practice Implementation On Culturally Responsive Teaching And Student Behavior, Patrice Mccoy

Dissertations

American public schools uphold the policies, standards, and disciplinary practices that guide the belief systems of how students view fairness and deal with conflict. As teachers invest in student knowledge and seek to guide students in the right direction, the challenge is learning the appropriate methods of dealing with student behavior. Behavior management practices have evolved just as many student challenges and needs have changed. With these changes evolves the need to better understand students and families. Teachers gaining cultural responsiveness to student behavior challenges is a relatively new ideology to ensure students feel understood and more engaged in the …

The Effectiveness Of Mbsr On The Occupational Stress Of Correctional Officers, Nikolas Kerr

Dissertations

This dissertation looks at the negative effects of the work environment and other factors related to correctional officers lived experience. The intervention concentrates on the effect of mindfulness-based stress reduction on the occupational stress of correctional officers. Correctional officers have always dealt with difficult work conditions, but over the last 30 years the increase in the number of incarcerated people, the lack of retention among correctional officers, and the proliferation of inmates with complex mental health issues and gang affiliations have all created a much more complex and dangerous work environment. Combine this with the new understanding of the effects …

A Descriptive Case Study Of An Innovative, University-Based Coaching System For Resident Teachers, Matthew J. Wester

Dissertations

Teacher residency programs (TRPs) have emerged over the past two decades as an effective model of teacher preparation. Within this alternative pathway to teacher certification, pre-service teachers, known as resident teachers, engage in a lengthy clinical teaching experience under the guidance of a trained mentor teacher and field supervisor while concurrently completing closely aligned, graduate-level coursework.

A key element of successful teacher residency programs is the use of a structured coaching system to support resident teachers — defined in this study as the components that form the coaching framework for resident teachers within a defined educational context, operating together to …

Students' Perspectives On Co-Creation Opportunities Within Bachelor's, Master's, And Doctoral Level Education Preparation Programs, Oana M. Manta

Dissertations

This study examines Bachelor’s, Master’s, and Doctoral students’ experiences with co-creation activities in education programs. Responding to voiced student concerns, it seeks to uncover ways in which students wish to share ownership of the learning process. Additionally, this study aims to contribute students’ thoughts to the existing co-creation literature. Incorporating evidence from a survey and multiple participant interviews, this study demonstrates that students across all three levels of study wish to experience an increase in co-creation activities, but the type and extent vary by level of study. It argues for instructors and overseeing institutions to negotiate, not prescribe, certain aspects …

Thai Choral Music In Intercultural Choral Literature: A Guide To Thai Choral Music, Dolhathai Intawong

Dissertations

Amid the evolving landscape of intercultural choral literature, Thai choral music emerges as a compelling yet underexplored genre, distinguished by its integration of unique linguistic and Thai musical elements. Despite the diverse choral repertoire in global music scene, the lack of resources on Thai diction and practical approach to Thai choral works for teaching and performing Thai choral music has resulted in its absence from choral global repertoires.

To address this gap, this research examines a comprehensive approach to Thai diction, providing a foundation for understanding the intricacies of Thai pronunciation which is applicable to a wide range of vocal …

Practicing And Performing Debussy’S Estampes, Yong Mei

Dissertations

Claude Debussy (1862–1918), a leading composer in the French impressionist movement, had a considerable impact on composition in the twentieth century. He wrote masterpieces in genres ranging from vocal music to chamber music to opera and orchestral works. Debussy’s piano works, particularly his four collections—Estampes (1903), Images Books I and II (1901 and 1905), Préludes Books I and II (1909–10 and 1913), and Études (1915)—brought significant innovations to the solo piano repertoire of his time and remain staples over one hundred years later. The purpose of this dissertation is to demonstrate my research for Estampes from various angles, including …

After The Bullets: Managing A Mass Shooting Resource Center Explored Through Autoethnography, Karen Allene Schweihs

Dissertations

The rate of mass shootings has more than doubled over the past 10 years in the United States (Gun Violence Archive, 2024). The focus of this study was a thorough exploration of my personal experiences in designing a response center after a mass shooting occurred in Boulder, Colorado. This study utilized a qualitative narrative inquiry form of research methodology called autoethnography. Autoethnography has been utilized to capture more than the raw data collected, but to offer a more expansive and detailed description of a unique experience. The following research questions were studied:

• Q1 What might I learn about my own …

Single-Shot Mev-Resolution Hard X-Ray Spectrograph For Cavity-Based X-Ray Free Electron Laser, Keshab Kauchha

Dissertations

The Cavity-Based X-ray Free Electron Laser (CBXFEL) is a possible future direction in the development of fully coherent hard X-ray sources of high spectral brilliance, a narrow spectral bandwidth of ≃ 1 − 100 meV, and a high repetition rate of ≃ 1 MHz. A diagnostic tool is required to measure CBXFEL spectra with a meV resolution on a shot-to-shot basis.

The CBXFEL hard X-ray spectrograph is designed to image 9.831 keV X-rays in a ≃ 200 meV spectral window and with a spectral resolution of a few meV using an LCLS XFEL (Linac Coherent Light Source X-ray Free Electron …