Digital Commons Network^™

Lost In Translation: The Impact Of Intermediate Language Representations On Machine Learning Applications, Logan Cannan

Dissertations

Machine learning assisted binary analysis is an area of great interest in cybersecurity research. Training accurate machine learning models requires methods of binary lifting, which can require binaries to be translated through an intermediate language representation. This dissertation postulates that different intermediate language representations change the performance characteristics of these machine learning models. This dissertation takes a published machine learning frameworks as a control, modifies their input methodology to include different intermediate language representation transforms, and performs direct comparisons of model performance to ascertain bias in performance caused by different intermediate languages. This research enables the machine learning engineer, focused …

Increase Successful Outcomes With Technology-Driven Mergers And Acquisitions : Prioritize Post-Merger Integration Risk Mitigation, Kingsley Eromosele Usianeneh

Dissertations

In the post-COVID-19 era, accelerated engineering advances including Artificial Intelligence (AI) have increased firm’s reliance on technology-driven mergers and acquisitions (M&A) as an expedient strategy to bolster their technological innovation capabilities, retain competitive advantage and ensure sustainability. However, many M&As fail to achieve their strategic goals because of persistent challenges during post-merger integration (PMI). This dissertation adopts and integrates chapter 2 – chapter 4 to identify, theorize, and proactively mitigate the primary recurring PMI challenges that impede successful technology-driven M&A outcomes. Chapter 2 adopts PRISMA guidelines, conducts a systematic literature review, identifies, and synthesizes four persistent PMI risk categories: (1) …

Strategies To Support Students With Adhd During Self-Selected Reading: An Evaluation Of Token Economy And Self-Monitoring, Tora Henson

Dissertations

Students with attention deficit/hyperactivity disorder (ADHD) often face challenges with attention and executive functioning, making it difficult to stay on task during self-selected reading (SSR). These difficulties can hinder academic progress. While research highlights the need for effective strategies to improve on-task behavior, limited studies have focused specifically on self-monitoring and token-economy interventions during SSR. This study investigated the impact of self-monitoring and token-economy strategies on the on-task behavior of students with ADHD during SSR. It aimed to answer the following questions: How do token economy systems and self-monitoring strategies impact on-task behavior for students with ADHD during self-selected reading? …

Middle-Level Teachers’ Attitudes On Disciplinary Literacy Instruction In The Non-Ela Classroom, Katherine E. Bowers

Dissertations

The persistent gaps in student achievement, particularly in the context of discipline-specific literacy skills, across public schools in the United States continue to widen. With a focus on South Carolina, this study investigates how professional development efforts have sought to address these gaps and enhance literacy instruction. Despite many initiatives, testing scores and teacher perceptions reveal limited progress in literacy outcomes. The study discusses a key challenge: the lack of substantial literacy instruction beyond English language arts (ELA) classes, resulting in a growing disparity between literacy mastery and the current reality. The research acknowledges the existence of literacy-focused professional development …

Faculty Motivation For Online Teaching And Learning, Elizabeth Sachiko Haas Greene

Dissertations

The study will examine which factors predict faculty motivation in online learning. Additionally, the study will investigate the relationship between faculty perceptions of online learning and overall online teaching and learning and the relationships that exist between perceptions of administrative support and self-efficacy for online learning. The study's findings will provide insight into how institutions can support faculty teaching in the growing online modality. The overarching method for this study is a nonexperimental quantitative study. This method will collect numerical data that can be used to measure various aspects of behavior, including attitudes (Drew et al., 2014). The study's participants …

Statistical Approaches In Evolutionary Biology: Using Threespine Stickleback Fish To Test Fisher's Geometric Model And Evaluate Methods For Handling Missing Data, Aaron Mathew Myrold

Dissertations

This thesis explores two distinct yet complementary aspects of evolutionary biology. The first chapter tests predictions from Fisher's geometric model of adaptation using a finely resolved fossil sequence of Gasterosteus doryssus spanning approximately 21,250 years. I analyze phenotypic changes in three armor traits during adaptation to a new environment and find that while step sizes follow the predicted exponential distribution—with many small steps and few large ones—they do not adhere to the model's temporal prediction that large-effect mutations should fix early in the adaptive walk. This discrepancy likely reflects adaptation from standing genetic variation rather than de novo mutation. The …

Genetic Architecture Of Complex Traits In African Ancestries Across Diverse Environments, Isadore Gregga

Dissertations

Given genetic and environmental diversity, genetic prediction based on African- ancestries individuals in the US or UK may not transfer well to other African diaspora regions. The Modeling the Epidemiological Transition Study (METS) is a longitudinal study of cardiometabolic health in five African-ancestry populations. We performed genome-wide genotyping in METS participants from the US, Jamaica, South Africa, and Ghana. We aimed to explore how genetic models for the transcriptome and body mass index (BMI) built using US- based African-ancestries populations perform in these four diverse populations. A subset of METS participants also had whole blood RNA-Seq data. For these, we …

Characterizing Niche Specialization In Staphylococcus Epidermidis, Sandra Jablonsk

Dissertations

This thesis investigates the microbial diversity of Staphylococcus epidermidis (S. epidermidis) across various anatomical sites in the human body. While traditionally viewed as a benign skin microbe, S. epidermidis also inhabits the urinary, gastrointestinal, and respiratory tracts, raising questions about its genetic variation and adaptability in different environments. The research aims to compare strains of S. epidermidis isolated from the oral cavity, nostrils, urinary tract, and skin of healthy individuals to determine if they share a common ancestor or if they evolved independently in response to specific environmental factors. The study comprises three main aims. Aim 1 focuses on assessing …

Insights On The Cranial Anatomy And Osteohistology Of Cyonosaurus, Alexander Acker

Dissertations

This study investigates the cranial anatomy and life history of the small-bodied gorgonopsian Cyonosaurus. Previous research on gorgonopsians has disproportionately focused on larger members of the clade, leaving smaller forms relatively understudied. This gap has led to several unresolved questions, the most pressing of which concerns gorgonopsian ontogeny. Specifically, it remains unclear whether small-bodied gorgonopsians represent genuinely diminutive adult individuals or juveniles of larger species. The specimen NHCC LB1087 presents an ideal opportunity to address this issue and gain new insights into the biology of small-bodied gorgonopsians. The first chapter focuses on cranial anatomy. Due to the specimen’s preservation, many …

Interactions Between Microplastics, Biofilms, And Antimicrobials In Freshwater Streams, Ryan Thomas Krantz

Dissertations

Microplastics (MPs) are ubiquitous contaminants in freshwater ecosystems that could be hotspots for the interaction of antimicrobial compounds and surface-attached microbial biofilm communities. MPs and antimicrobials are both common in wastewater and urban freshwaters and MPs can adsorb contaminants like antimicrobials to their surface. Within aquatic habitats, MPs also support colonization by microbial biofilms. Therefore, we hypothesized that the adsorption of antimicrobials to MP surfaces would affect microbial communities colonizing MPs, altering their diversity, composition, and antimicrobial resistance. We investigated the effects of these interactions across two studies. The first study, discussed in Chapter 2, used a microcosm approach to …

Leadership Communication And Symbolic Language In Organizational Change: A Study In Higher Education, Christine Fischer

Dissertations

Higher education institutions face growing pressures related to affordability, accessibility, and trust. In this environment, leadership communication, especially symbolic language that frames transformation as mission-aligned, plays a central role in shaping organizational change. This qualitative single-case study examined how leaders at a private Christian liberal arts college used metaphors, narratives, and values-based discourse to communicate an innovative tuition model and how this language influenced stakeholder perceptions, engagement, and resistance. Data included 26 leadership communication documents, a metaphor-based faculty and staff survey, and eight semi-structured interviews. Reflexive thematic analysis and metaphorical analysis were used to interpret symbolic language, meaning-making processes, and …

Healthcare Providers’ Lived Experiences During Pivotal Change, Lisa Raynelle Shelley

Dissertations

This phenomenological study examined healthcare providers’ lived experiences of psychological safety and administrative leader behaviors that influenced those experiences during pivotal change. While much research addressed psychological safety among frontline healthcare staff, a gap was noticed concerning providers. This study aimed to investigate the impact of psychological safety and administrative support on provider engagement, emotional response, and retention during periods of significant change. Data were collected via a survey containing multiple-choice and open-ended questions, followed by semi-structured interviews. Four findings emerged. First, the providers’ pivotal events generated themes of “workplace power dynamics,” “systemic and organizational change,” “transformational crisis,” and “physical …

Including Conscientiously: How Charter School Educators Experience Inclusion Education Implementation, Joe A. Petty

Dissertations

This narrative inquiry examined how charter school educators experience inclusive education implementation while confronting ableist systems that maintain exclusion through seemingly neutral practices. This research emerged from my lived experience of how educational structures systematically marginalize disabled students while appearing progressive. The study investigated two research questions: how support structures and leadership practices either perpetuate or dismantle ableist assumptions embedded in educational practice, and how educators negotiate tensions between implementing evidence-based inclusive strategies and addressing environmental factors that create the need for those strategies.

Data collection employed semistructured interviews with eight credentialed educators across two Southern California charter school sites, …

Signal-To-Interference Degradation Due To Adc Dynamic Range For A Pulsed Doppler Radar Digital Signal Processor, Shawn Richard German

Dissertations

The objective of this study was to develop an expression for signal processor signal-to-interference ratio (SIR) improvement that combines factors that have historically been treated separately into a simple closed form expression, specifically factors such as analog-to-digital converter (ADC) dynamic range, phase noise, sub-quanta signal levels, signal-to-noise ratio (SNR), gain, automatic gain control (AGC), receiver noise, and signal and clutter characteristics. The SIR expression developed in this study quantifies how much a signal processor’s performance is degraded by the inclusion of an analog-to-digital converter (ADC) with respect to an equivalent well designed all-analog design. Using this unified SIR metric, expressions …

Toward Measurable Explainable Ethical Ai: An Llm-Driven Data Analytics Study, Greg Bacon

Dissertations

Large Language Models (LLMs) have been a hot area for popular and research audiences. Users marvel subjectively at Artificial Intelligence (AI) outputs — so much that OpenAI delayed public release of Generative Pre-trained Transformer 2 (GPT-2) back in 2019, citing ``safety and security concerns.'' This research advances ethical and transparent AI through qualitative and quantitative measures between user intent and LLM responses in a way that aims to assist users with clear indications of good and poor alignment and of where to backtrack to minimize bias and hallucinations. The use case is recommending grant topics in a United States Department …

Manganism And The Development Of A Green Sustainable Low-Threshold Spectrophotometric Test For The Monitoring Of Manganese In Consumable Water, Anna Merritt Holmes

Dissertations

Manganism, a neurotoxic disease from the hyperaccumulation of manganese, follows an etiology that parallels Parkinsonism. Non-occupational Manganism is acquired by the lifelong accumulation of manganese through water contaminated by natural and industrial sources. Biologically active manganese (II) eludes flocculation and filtration removal methods at water utilities. The U.S. Standard Methods For the Examination of Water and Wastewater persulfate testing method uses mercury sulfate, concentrated nitric and phosphoric acids, silver nitrate, and ammonium persulfate. The low detection limit of 210 µg/L is an order of magnitude greater than the World Health Organization (WHO) allowable limit of 10-50 µg/L. In 2004, the …

Observational Analysis Of Small-Scale Structures Across The Earth’S Bow Shock, Rebecca Harvey

Dissertations

This work identifies and characterizes magnetic structures in the solar wind and magnetosheath across the Earth’s bow shock. I investigate the differences between the properties of small-scale flux rope (SFR) structures immediately upstream and downstream of the bow shock by employing two data analysis methods: one based on wavelet transforms and the other based on the Grad-Shafranov (GS) detection and reconstruction techniques. 676 hours in the solar wind, and 1051 hours in the magnetosheath, of in situ magnetic field and plasma data from the Magnetospheric Multiscale (MMS) and Time History of Events and Macroscale Interactions during Substorms (THEMIS) missions were …

Assessing The Selection And Impact Of Completeness In Technical Measure Sets In Systems Engineering, Casey Eaton

Dissertations

Technical measurement is foundational in large-scale complex engineered systems (LSCES) design and contract awards due to the state of practice of systems engineering. Although technical measurement is ubiquitous in systems engineering practice, the selection and assessment of the impact of a set of technical measures is often heuristics-based, rather than based on empirical evidence or theory. Current technical measure set selection has been observed to be subject to many challenges which, in turn, can degrade system outcomes. Two main thrusts comprise the research: selection and impact. Motivated by the potential impacts of a poor set of technical measures, a significant …

A Rubber-Band System For Dynamic Incentivization Of Parallelized Gamified Objectives, Nicholas Diliberti

Dissertations

With the advent of videogames as the world's first mass-market interactive media, gamification has emerged as the premier way to harness powerful behavior-affecting gamified elements and place them in other contexts, such as education, fitness, and rehabilitation. This transposition, however, ignores a key tenant of user engagement: reward ought to be aligned with effort. Most, if not all, current gamification systems dispatch static reward allocations for their spread of gamified behaviors. In this paper, an alternative is presented: dynamic gamification. This dynamic gamification reads the user's current gamified state for indicators of aptitude, dynamically remaps rewards with a tuneable evaluation …

Understanding Pediatric Healthcare Access From A Black Parental Perspective : A Qualitative Study, Jessica A. Celestand

Dissertations

In the United States, healthcare access disparities have existed for several years in the African American/Black pediatric population. The District of Columbia ranks first nationally for health insurance coverage; however, African American/Black children have disproportionately experienced barriers to care compared to the District of Columbia’s pediatric population overall. There are current gaps in research that investigate African American/Black pediatric healthcare access from a parental perspective. The purpose of this descriptive phenomenology qualitative study was to explore research gaps by investigating barriers and facilitators to care, and the social determinants of health that impact pediatric healthcare access through the lens of …

Mutual Coupling Reduction Techniques In Transverse-Electric-Mode And Hybrid-Mode Microstrip Patch Antenna Arrays, Matthew A. Adams

Dissertations

When the elements of an antenna array are closely spaced, the electromagnetic coupling between them can distort the radiation patterns of the individual elements and change their input impedances, causing significant degradation in the array’s performance. Numerous mutual coupling reduction methods exist in the current literature, each of which allows array elements to be closely spaced while being well-isolated from each other. This dissertation investigates mutual coupling reduction techniques for microstrip patch antenna arrays utilizing elements that excite the fundamental transverse electric (TE) mode. First, a mutual coupling reduction method inspired by the TE-mode microstrip patch cavity model is proposed …

Modeling Solar Wind In The Inner Heliosphere With Quantified Uncertainties, Dinesha Vasanta Hegde

Dissertations

The solar wind (SW) is a vital component of space weather (SWx), providing a background for solar transients such as coronal mass ejections, stream interaction regions, and energetic particles propagating toward Earth. Accurate prediction of SWx events requires a precise description and thorough understanding of physical processes occurring in the ambient SW plasma. This dissertation investigates the effect of uncertainty associated with solar photospheric boundary conditions (BCs) on magnetohydrodynamic (MHD) simulations of the SW in the inner heliosphere. For this purpose, I perform ensemble simulations of the three-dimensional SW flow using an empirically-driven MHD heliosphere model implemented in the Multi-Scale …

Living In The Hyphen: Creating Puentes Through Encuentros And Pláticas With Latinx Cross-Cultural Kids, Jennifer Jane Daby

Dissertations

Latinx cross-cultural kids, or children of immigrants, are often faced with a feeling of not belonging to mainstream American culture nor their parents’ home culture(s) of origin. As such, they are viewed through a deficit lens and forced to negotiate their sense of identity and belonging through language and culture to fit in. By embracing the concept of educación, using culturally responsive methods of encuentros and pláticas with cross-cultural kids and their families, this study intends to find ways to foster a sense of belonging for this population in schools through participants’ testimonies. It aims to find ways to bridge …

The Ethical Theory Of Enrique Dussel: An Investigation Of Violence And Coercion In His Three Foundational Principles, Eric Antonio Del Valle Cruz

Dissertations

Problem

Enrique Dussel's ethics proposes addressing global inequality through legitimate coercion as a means of liberating the poor, contrasting it with the violence of the current system. However, the inclusion of life-threatening acts, such as armed revolution, as coercion raises practical challenges for the Christian community, including ethical-political dialogue, inclusion of opposing parties, and potential dehumanization, which need further exploration in light of Dussel’s use of Scripture in support of his proposals.

Purpose

This dissertation aims to assess Dussel's philosophical principles and their connection to coercion and violence, ultimately establishing a framework for a conservative Christian proposal that combines the …

The Impact Of Professionalism Education And Formative Feedback In Doctor Of Physical Therapy Students Utilizing The Abbreviated Cpi Feedback Form In The On-Campus Clinic Environment, William L. Scott

Dissertations

Problem

The American Physical Therapy Association (APTA) developed the Clinical Performance Instrument (CPI) to assess the professional behaviors required for a Doctor of Physical Therapy (DPT) student to be considered "entry level" in their clinical training. Feedback from our clinical partners has indicated that, historically, students from the Andrews University DPT program have scored lower than students from other programs in several areas of the CPI during their clinical experiences. According to subjective reports from our clinical partners, these areas included safety, professional behavior, accountability, communication, and critical thinking. These five areas have been the focus of our efforts in …

Moral Identity And Its Relationship To Higher Education Mentoring And Community Service Engagement, Maria O. Rodriguez

Dissertations

Problem

A moral action is a result of the engagement of multiple psychological processes set in motion when an individual faces a moral conflict. Research suggests that an individual's moral reasoning and moral identity strongly influence the psychological processes that precede a moral action. Recent studies have shown that higher education positively influences students' moral reasoning; however, there is a lack of understanding as to the degree to which higher education can influence the moral identity of students.

Method

This study performed a quantitative cross-sectional study to investigate the relationship between independent variables—mentoring experiences and community service engagement—and dependent variables—moral …

Support Needs Of Agrarian Women To Build Household Livelihood Resilience: A Case Study Of The Mekong River Delta, Tran Thi Ngoc Tran

Dissertations

Problem

Rural livelihood faces significant challenges due to the increasing frequency and severity of climate change impacts. However, the development of women’s livelihood resilience remains constrained by gender-blind policies, limited sex-disaggregated data, and a lack of integration of gender-specific needs and priorities in resilience-building interventions. This study aims to address these critical gaps. This study aims at exploring the perceived support needs of rural agrarian women in building household livelihood resilience to climate change. Specifically, it seeks to (1) understand how household livelihood resilience is perceived by rural agrarian women, and (2) identify the support they require to effectively adapt …

The Relationship Between Mindfulness, Emotion Regulation, And Anxiety Levels Among College Students In Saudi Arabia, Tahani Aljuaid

Dissertations

Problem

Anxiety is one of the most common psychological issues affecting youth globally and is particularly prevalent among Saudi adolescents and college students. Studies in Saudi Arabia have reported anxiety rates ranging from 48.9% to 66.2% among adolescents and high levels of generalized anxiety among university students, especially females (Aldosary et al., 2023; Alhabeeb et al., 2023). Poor emotion regulation has been identified as a key factor associated with anxiety and other mental health difficulties. In recent years, mindfulness has gained attention as a protective factor that promotes better emotion regulation and reduces anxiety symptoms. Despite this growing recognition, there …

From Devout Follower Of Muhammad To Committed Disciple Of Jesus: Principles And Methods Of Transition Phase Discipleship Among Adventist Believers From A Muslim Background In Ethiopia, Temesgen Bulti Besha

Dissertations

Islam is the second most dominant religion in Ethiopia commanding about 34 percent of the over one hundred ten million population of the country. The Seventh-day Adventist Church has not been successful, until recently, to effectively reach this large and growing Muslim population. In the last decade and half, hundreds of Ethiopian Muslims are coming to faith in Christ through the ministry of the Church. However, church members, leaders, and disciplers lack adequate understanding of the transition phase discipleship during which the new believers from Muslim background (BMBs) go through considerable challenges such as persecution, lack of social and economic …

Religious Participation, Subjective Happiness, And Purpose In Life As Predictors Of Psychological Resilience Among College Students At A Faith-Based Institution In The United States, Elaine Powell Oliver

Dissertations

Problem

During the transition from adolescence to adulthood, also known as emerging adulthood, many college students experience psychological distress, such as anxiety, depression, stress, and loneliness (Arnett & Tanner, 2009; DeRosier et al., 2013). For some students, their psychological distress will impact how they perform academically and whether they will persist in their academic goals (Hartley, 2012; Robbins et al., 2018). Many students lack the resilience needed to survive and thrive amid the challenges of college life (Lane, 2020; McLafferty et al., 2022; Watkins et al., 2012). -- Resilience is considered an essential psychological characteristic to assist students in navigating …