Digital Commons Network^™

Design And Development Of Machine Learning And Deep Learning Based Algorithms For Cyberattacks Detection, Abiramasundari S

Theses and Dissertations

E-mail is the fastest mode of communication. It is amongst the most commonly used modes of communication and can be used for both legal and illegal purposes. Many elements that could be useful in detecting email fraud are constantly being investigated. Phishing assaults in which thieves use Internet to trick consumers into visiting fake websites are very common and are causing significant harm to victims. Several methods of filtering phishing emails have been devised but a solution to the problem still evades. One of the attacks addressed in this research is email phishing. Machine learning is a popular and efficient …

Investigations Of Secure Memory For Vlsi Based Crypto System, Vijay Sai R Mr

Theses and Dissertations

Semiconductor technology is growing very rapidly in their architectural developments, involving the usage of processor and memory. Presence of memory, in general is a vital commodity in various devices which are almost embedded into human activity, from robust work stations to handy mobile phones. Security of data stored in memory is very important, and hence, observation must be made that these valuable data should not be thwarted by malicious means. Security in cache memory is a major issue in memory related applications such as smart cards and bio-metric implementations.

Cache, is a small and limited memory located between central processing …

Genomic Surveillance Of Indian Klebsiella Pneumoniae And Exploration Of Resistance Inhibitors, Abhirami Ks Ms

Theses and Dissertations

Klebsiella pneumoniae is an important ESKAPE pathogen that causes life threatening infections. The strains exhibiting multidrug-resistance (MDR) and hypervirulence are the priority pathogens for which immediate treatment and dissemination prevention strategies are required. To address this, genome profiling was performed to understand the AMR patterns, role of episomes, phages, virulence determinants and its association with sequence types.

The study includes 267 publicly available Indian K. pneumoniae genomes over a period of ten years and four sequenced isolates. Whole genome analysis revealed the widespread presence of diverse β-lactamase genes, with β-lactam resistance being predominant. Genes such as blaCTX-M-15, blaTEM-1B and blaOXA-232 …

Three Essays On Green Innovation, Saha Iqbal Hossain

Theses and Dissertations

This study examines the strategic role of green innovation in addressing escalating environmental challenges. Comprising of three interrelated essays, the study integrates computational, theoretical, and empirical approaches to provide a comprehensive understanding of the antecedents, mechanisms, and outcomes of green innovation at the firm level. The first essay conducts a systematic literature review employing advanced computation tools, including topic modeling (LDA and BERTopic) and scientometric analysis to elucidate the intellectual framework, thematic evolution, and central knowledge areas and flows within the green innovation research field. The second essay empirically investigates how internal firm resources- research & development (R&D) intensity, acquisition …

Seating Charts, Connections, And Fostering Community, Mckenna B. Chow

Theses and Dissertations

This thesis explores how fostering stronger connections in the high school ceramics classroom can create a more inclusive and collaborative community. I regularly changed seating charts to encourage new relationships and strengthen classroom culture as part of this effort. Historically, seating charts have enforced uniformity and promoted specific behaviors. My research challenges these traditional purposes and proposes that seating arrangements can instead serve a more meaningful and enduring goal: promoting connection and ensuring that all students feel seen. I found that while seating charts can contribute to this goal, achieving genuine connection and inclusivity also requires several additional factors to …

Evaluating Nfl Quarterback Decision Making Through Tracking Data, Jesse N. Melville

Theses and Dissertations

Quarterback decision-making is one of the most critical determinants of success in the National Football League (NFL), yet traditional statistics fail to account for the spatial, temporal, and contextual factors influencing each play. This thesis proposes a data-driven methodology for evaluating quarterback decisions using NFL player tracking data from the 2022 season. We replicate and extend the DeepQB framework by training deep learning models to estimate expected completion probabilities and expected yards gained for each receiver at the moment of the throw. Our extension applies the approach to a newer dataset with additional contextual features, enabling a more detailed evaluation …

Scent Of The South: Fragrance And Identity In The 19th Century, Sarah Donahua Peters

Theses and Dissertations

This thesis explores the role of personal fragrance as a cultural marker in the 19th-century American South, examining how scent reflected identity, status, and social norms in a region shaped by colonialism, capitalism, and religious influence. Drawing on historical sources, botanical knowledge, and public history practices, the project traces the evolution of fragrance from home-crafted perfumes to mass-marketed products, highlighting how access to scent was shaped by race, class, and gender. Central to the thesis is a public history exhibition designed for the Esse Purse Museum in Little Rock, Arkansas, which invites visitors to engage with scent as a medium …

Executive Functioning And Mental Health In Emerging Adults: Type 1 Diabetes Status As A Moderator, Hannah Margot Mcdaniel

Theses and Dissertations

Emerging adults (ages 18-26) with type 1 diabetes mellitus (T1DM) are especially vulnerable to diabetes management challenges when taking on increased disease responsibility during this critical period of development. They may experience higher cognitive and psychological demands compared to peers. The study examined whether having T1DM moderated the association between executive functioning (EF) and mental health symptoms (i.e., depression, anxiety, stress, and disordered eating) in emerging adults. Exploratory analyses investigated the associations between EF, disease management, and mental health symptoms. Participants were 35 emerging adults with T1DM and 35 healthy controls. Participants completed questionnaire measures of mental health and performance-based …

The Association Of Anxiety, Familial Dysfunction, And Child Emotion Regulation Between Family Therapy Sessions 1 And 4, Kaelie Noel Lemmon

Theses and Dissertations

Few studies address how relational factors may be interdependent and impact child-focused problems that could be collectively addressed in systemic family therapy. The current study utilized a cross-lagged panel model to explore the associations of parental anxiety, familial dysfunction, and child emotion regulation between four family therapy sessions. The study included 224 parents who sought family therapy and participated in the Marriage and Family Therapy Practice Research Network (MFT-PRN). Data were collected at two time points across four family therapy sessions. The findings indicated that higher levels of parental anxiety at intake were associated with higher familial dysfunction at session …

A Dendrite Equivalence Relation On Loop Spaces, Spencer Arnesen

Theses and Dissertations

In Definition 2.0.3 we define an equivalence relation on paths such that two paths into a space X are related if doing the first, then the second backwards factors as a loop through a dendrite. This equivalence relation induces a group structure L(X) on a large subset of the loop space of X, namely all loops that have a unique reduced representative. We show that certain continuous maps induce a homomorphism between dentropy groups and that projection from three-dimensional real space to two-dimensional real space does not induce a homomorphism on dentropy groups.. We show that dentropy groups are locally …

The Governor’S Cabinet Project A Study Of The Evolution Of The Executive Branch, Revis. L. Edmonds

Theses and Dissertations

In Arkansas’s long path toward modernizing its executive branch, it may appear to the casual observer that the state was locked in a process in which its politics and its culture were engaged in a longstanding tug-of-war between traditionalists and modernizers—a conflict complicated by the state’s personality-based politics and restrictive post-Reconstruction constitution. It has often been asserted that the conflict, in Arkansas’s case the romanticizing of rural life as opposed to the economic and social interests of the fast-growing suburbs of Central and Northwest Arkansas, explains a great deal of this slow transition. This attitude was largely a product of …

Computational Modeling Of Magnetic Field Interaction With Superconductors Under High-Field And High-Dissipation Conditions: A Tdgl Approach Applied To Nb And Nb3sn, Aiden Victor Harbick

Theses and Dissertations

Superconducting radiofrequency (SRF) cavities are essential components in modern particle accelerators, enabling the efficient acceleration of charged particles for various applications in physics, medicine, materials science, and beyond. The performance of these cavities is significantly influenced by the properties of superconducting materials, such as niobium (Nb) and triniobium-tin (Nb3Sn), and the defects and surface features present within the material. This dissertation presents a computational study focused on understanding the behavior of SRF cavities, using a sample-specific time-dependent Ginzburg-Landau (TDGL) framework to simulate their performance under realistic material conditions. The research integrates experimental data and density functional theory (DFT) calculations to …

Mathematics Student Teachers' Curricular Reasoning During Planning, Erika Breann Miller

Theses and Dissertations

Teaching is a complex practice, in part because of all the decisions teachers make daily. This is especially true for student teachers who have little to no prior teaching experience to inform them about the decisions that need to be made in the classroom and how to reason through all those decisions as they plan and enact the lessons. Secondary mathematics student teachers were introduced to the Instructional Pyramid (Dingman et al., 2021) which organizes and maps teacher’s mathematical reasoning onto four elements of a classroom—teacher, student, mathematics, and curriculum—to examine which curricular reasoning aspects they use while planning mathematics …

Characterizing And Modeling The Nonlinear Behavior Of Additively Manufactured Trapped-Powder Dampers, Jonathan Knight Black

Theses and Dissertations

Laser Powder Bed Fusion (LPBF) can be used to create metal parts with pockets of retained, unfused powder that serve as mechanical dampers. These trapped-powder dampers show promise for reducing the amplitude of vibrations at resonance by orders of magnitude. However, little is currently understood about the nonlinearity and repeatability of trapped-powder dampers, meaning that the design process currently consists of expensive trial-and-error prototyping and iteration. The present work contributes a corpus of experimental measurements for rectangular beams with trapped-powder dampers of various dimensions and locations. Preliminary testing revealed the presence of a memory effect which we hypothesize to be …

Investigating Radiation Induced Rowhammer And Retention Failures In Dram, Tyler Ricks

Theses and Dissertations

It is desirable for DRAM devices to be used in harsh radiation environments. Exposure to radiation causes DRAM cells to lose their retention time as their ability to store charge effectively declines. Exposure also worsens the effect of disturbance that causes neighboring cells to flip when a row is opened multiple times: an effect known as the Row Hammer Effect. This thesis evaluates the impact of radiation-induced memory cell degradation by comparing memory cell's retention time and their resilience to the row hammer vulnerability. Three generations of DRAM were placed under a neutron radiation beam. Sections of the irradiated devices …

Remote Running Gait Analysis Using Smartphone Video And Monocular Pose Estimation: A Feasibility Study, Luke Vankeersbilck

Theses and Dissertations

Introduction: Running is a common form of exercise that comes with many health benefits; however, many people stop exercising because of the high injury risk. Running injury is connected with biomechanical risk factors. Yet, these risk factors often show inconsistent and conflicting results across studies, largely due to small sample sizes limiting statistical power. Low subject numbers may be partly due to the time requirements of traditional motion capture. Monocular pose estimation offers a promising alternative by using machine learning to track body landmarks from a single camera. This study evaluated the feasibility of remotely collecting running biomechanics data using …

Ai-Enabled Innovations In Automated Essay Scoring And Feedback Systems, Michael J. Murff

Theses and Dissertations

This dissertation examines the evolution and educational implementation of Automated Essay Scoring (AES) systems, with particular focus on generative artificial intelligence integration in educational assessment. Through a two-article format, this research addresses the persistent gap between technical capability and educational adoption that has characterized AES development over seven decades. The first article presents a comprehensive methodological review analyzing 122 studies spanning AES evolution from foundational computational linguistics through contemporary hybrid systems. Despite achieving strong correlations with human scoring, modern AES systems face resistance due to validity concerns and misalignment with pedagogical values, revealing an "adoption paradox" where technical sophistication often …

Under The Sea And Into The Future With Darwin, Verne, & Wells: Evolutionary Ideas In Early Science Fiction Literature And Atomic Age Adaptations, Suzette K. Forston

Theses and Dissertations

In the latter half of the nineteenth century, Charles Darwin's theories challenged traditional ways of thinking about the world so dramatically that his writings inspired the formation of a new genre: science fiction. Two pioneering authors, Jules Verne and H. G. Wells drew from Darwin's writings in their classic novels, 20,000 Leagues Under the Seas (1870) and The Time Machine (1895). Though the two authors are often compared because they were both early science fiction authors, they approached Darwinian theory in different ways. Verne uses a more extrapolative approach and focusing on specific details of Darwin's texts to tell a …

First-Year Writing Student Perceptions Of Graduate Student Instructor Authority, Lacey Madison Hamilton

Theses and Dissertations

Graduate student instructors (GSIs) are trusted to teach first-year writing (FYW) courses across U.S. campuses, yet many still wonder how their undergraduate students actually perceive their authority, especially when they're new to teaching or sharing a classroom with full-time faculty. While previous research has explored how GSIs view their own authority and how institutional structures shape their roles, we know far less about what students of these GSIs think. This study aims to fill that gap. Building on Reed and Ostenson's work in Big Comp, I conducted a mixed-methods study in Fall 2024 to hear directly from FYW students about …

Circadian Influences On Glycemic Control In 24-Hr Fasts Initiated At Different Mealtimes, Elizabeth Z. Gipson

Theses and Dissertations

This study investigated whether the timing of a 24-hour fast influences indicators of glycemic control throughout the duration of the fast or upon refeeding. Twenty-four adults who have overweight or obesity (13 female, 11 male) completed this randomized crossover study involving three 24-hour fasts initiated at either 8:00 am, 1:00 pm, or 6:00 pm followed by a 75 g oral glucose tolerance test (OGTT) which lasted 2 hours. Continuous glucose monitors (CGMs) were employed to track interstitial glucose throughout each fast and OGTT. Plasma samples for insulin, glucagon, glucagon-like peptide-1 (GLP-1), and glucose-dependent insulinotropic polypeptide (GIP) were collected at the …

Chemically Mediated Communication In Mound-Building Termites, Sree Subha Ramaswamy

Theses and Dissertations

Nest-building in social insects requires layered communication to coordinate complex, functional structures for housing, protection, storage, and homeostasis. This is especially striking in mound-building termites, which construct and repair large mounds collectively despite lacking image-forming eyes. This thesis investigates how Odontotermes obesus achieves such coordination through chemical communication embedded in soil.

Using controlled two-choice assays with manipulated soils, I separated airborne volatile signals from contact non-volatile signals by baking to remove volatiles, a mesh assay that presented volatile cues without contact, and solvent extraction with reapplication of contact cues. I quantified responses in major-only, minor-only, and mixed groups at two …

Compact Heterogeneous Architectures And Algorithmic Methods For Enhanced Real-Time Digital True Time Delay Beamforming And Radar Applications, Nathan Lynn Burnett

Theses and Dissertations

Modern radar and signal processing systems require efficient computational architectures to handle increasing data rates while still being able to maintain dynamic configurability and complex tasks. This thesis presents and explores hardware and algorithmic approaches addressing these demands across several different applications. First, a low-cost tracking platform and architecture for unmanned aerial vehicles (UAVs) is developed, which provides detection and tracking capabilities, compliant with new FAA remote ID regulations. Second, a GPU-FPGA based digital true time delay beamformer is implemented to achieve real-time wideband radio frequency interference (RFI) mitigation. Specifically this beamformer explores weight calculation and calibration through particle swarm …

Versatile Waveform Generation And Clocking Techniques For Rfsoc-Based Digital Designs, Michael David Jones

Theses and Dissertations

Within an ever-evolving radio-frequency (RF) environment, designers are required to adapt systems to increasingly constricted parameters. The available tools continually grow to match this need, but so does the complexity in using them. The radio-frequency system-on-chip (RFSoC) is an innovation that combines a field-programmable gate array (FPGA) with an integrated RF chain. Designing with an RFSoC allows for high-precision data transmission, sampling, and processing, but it can be difficult and time-consuming to develop specialized circuits. The open-source CASPER project aims to provide a library of abstracted block-design components to simplify the design process. An arbitrary waveform generator (AWG) is created …

A Novel High-Order Absorbing Boundary Condition For Elastic Multiple Scattering Problems, Jordan Gregory Sheppard

Theses and Dissertations

Elastic waves are waves that propagate by causing deformations in an elastic medium such as metal, rock, or rubber. The main characteristic of elastic wave motion is the coexistence of multiple types of waves at once in the medium, including compressional and shear wave components. This type of motion can be used to study the impacts of physical phenomena such as earthquakes. In this paper, we discuss our research on the time-harmonic scattering of elastic waves in a medium by multiple circular cylindrical obstacles that the wave cannot penetrate. Using the Helmholtz decomposition, we break down the vector-valued physical system …

Is Social Media Use A Reason For Socially Withdrawn Individuals' Mental Health Difficulties?, Angela Grundvig

Theses and Dissertations

Studies have found a link between subtypes of social withdrawal and internalizing problems throughout most of the lifespan. However, the work conducted in adolescence is much more limited including a lack of work examining factors that might mediate the association between forms of social withdrawal and internalizing problems. Social comparison may be one way in which social withdrawal predicts internalizing problems. There has been research showing that social media usage is associated with internalizing problems. The purpose of this study was to assess (a) the associations between three subtypes of social withdrawal (shyness, avoidance, and unsociability), respectively, and indices of …

Copper Oxide Nanoparticles As Delivery Vehicles For Different Pt (Ii)-Drugs: Experimental And Theoretical Evaluation, Shahdan Abdelkareem

Theses and Dissertations

Platinum(II)-based chemotherapeutic agents such as cisplatin, oxaliplatin, and nedaplatin are mainstays in the treatment of a wide range of solid tumors, yet their clinical application is severely restricted by rapid degradation, poor bioavailability, and dose-limiting side effects. These challenges arise in part from the drugs’ susceptibility to premature hydrolysis, off-target interactions in the bloodstream, and degradation in the gastrointestinal tract, which collectively limit their ability to reach and act on tumor cells. To address these limitations, we explored the use of copper(II) oxide nanoparticles (CuO NPs) as nanocarriers for platinum(II) drugs, aiming to enhance drug stability, loading, and controlled release. …

Investigating Relationships Between Education Professionals' Trauma Histories And Causal Attributions For Students' Disruptive Behaviors, Christina D. Rodefeld

Theses and Dissertations

Using attribution theory as a theoretical framework, this mixed methods study investigated how education professionals reported and perceived the relationship between their histories of trauma and their attributions for disruptive student behavior. Participants completed four surveys to measure Adverse Childhood Experiences, adulthood trauma, COVID-19-related trauma, and causal attributions for disruptive behavior. Bivariate correlations between each of the trauma history datasets and causal attributions datasets were conducted to investigate these relationships. Two semi-structured interviews with six participants were also conducted and analyzed using deductive and inductive coding processes. Quantitative analyses found a statistically significant relationship between participants’ reported adulthood trauma amounts …

Routine Outcome Monitoring With The Youth Outcome Questionnaire-30.2 Self-Report: Creating And Testing An Empirical Alert System And Exploring Informant Discrepancy Patterns, Tate M. Paxton

Theses and Dissertations

Objective: Youth self-report data using the YOQ-30 has not been specifically examined for use in routine outcome monitoring systems. This study used the YOQ-30 self-report in three endeavors: (1) modeling change trajectories in a large, naturalistic outpatient sample, (2) creating and testing an empirical alert system for deterioration, and (3) exploring the role of informant agreement, both descriptively and in a change trajectory model. Method: The sample consisted of 21,098 adolescents ages 12-17 receiving outpatient mental health care who used the OQ Measures system. Multilevel individual change trajectory models estimated symptom change over time. An alert system was developed on …

Topological Homotopy Groups, Tyler Evans

Theses and Dissertations

In general, the homotopy groups of topological spaces fail to be topological groups when endowed with the quotient topology. In this thesis, we show that for Peano continua with Abelian fundamental group, the fundamental group endowed with the quotient topology is indeed a topological group. However, this result does not extend to higher homotopy groups; that is, there exists a Peano continuum whose nth homotopy group, endowed with the quotient topology, is not a topological group. Additionally, a new characterization of the quotient topology in terms of a limit operator is introduced.

Attachment Or Aversion: A Study Of The Effects Of Parental Technoference On Child Emotion Knowledge, Brooklyn Coleman

Theses and Dissertations

Young children's understanding of emotions is heavily socialized by their parents. Through interactions with parents, children learn what emotions look like, when they are expressed, and how they are labeled (Laible, 2004a). Interruptions to interactions between children and parents have the potential to influence the development of children's emotion knowledge. According to the DREAMER framework, how one family member uses media and technology can influence other family members (Barr et al., 2024). Technoference (i.e., digital distraction while with others) is one example of how media might interrupt family life and influence child development as a whole. The current study examined …