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I Think I Can: Kindergarten Teacher Perceptions On The Impact Of Loose Parts Play On Self-Efficacy Behaviors, Adena Rene Thomsa
I Think I Can: Kindergarten Teacher Perceptions On The Impact Of Loose Parts Play On Self-Efficacy Behaviors, Adena Rene Thomsa
Graduate Theses and Dissertations
Play in the classroom is often a source of debate. The merits of play on early childhood development are well documented, especially regarding self-efficacy - an individual’s belief in their ability to perform a task or complete a goal. Self-efficacy has, in turn, been linked to academic resilience and achievement. Despite these findings, research shows a decline in unstructured play opportunities in both preschool and kindergarten. During a play intervention study, pre-kindergarten and kindergarten teachers were interviewed about student behaviors before, during, and after loose parts and other playful materials were added to their classroom environment. This thesis examines the …
The Fate Of Intra- And Extracellular Antibiotic Resistance Genes Through Advanced Wastewater Treatment Process, Celestene Adrianne Sebag
The Fate Of Intra- And Extracellular Antibiotic Resistance Genes Through Advanced Wastewater Treatment Process, Celestene Adrianne Sebag
Graduate Theses and Dissertations
More areas across the globe are becoming affected by water stress or water scarcity. The decrease in available freshwater due to overconsumption reveals the direct need to consider other sources for necessities such as drinking water or food production. Agricultural irrigation uses 70% of the world’s freshwater, making the focus on safe and reliable reclaimed water for agricultural reuse imperative. However, contaminants of emerging concern (CECs), such as antibiotics and their resulting antibiotic resistance genes (ARGs), can spread and affect human health if reclaimed water is not treated to the proper level. Antibiotics are widely used in human medicine and …
Ab Initio Studies On Mechanical Properties Of Freestanding Ferroic Monolayers, John Malcolm Davis
Ab Initio Studies On Mechanical Properties Of Freestanding Ferroic Monolayers, John Malcolm Davis
Graduate Theses and Dissertations
This thesis explores the role of mechanical properties and elastic couplings in freestanding paradigmatic ferroic monolayers within the framework of density functional theory. This dissertation is comprised of three interconnected published studies: (i) establishing the elastic behavior across a temperature-driven phase transition in SnSe monolayers; (ii) thermally-driven phase transitions in graphene-like silicene, germanene, and stanene, examining the structural stability and band gap occlusion; and (iii) magnetoelastic coupling in an Ising-like CrSiTe3 monolayer, focused on assessing magnetic contributions to the material stiffness by establishing a proper non-magnetic reference.
Advancing Social Sustainability In Operations And Supply Chain Management: A Multi-Theoretical Exploration Of Technology, Task Familiarity, And Sustainability Interactions, Satabdi Hazarika
Graduate Theses and Dissertations
Social sustainability in operations and supply chain management (OSCM) centers on generating economic value through practices that safeguard people, communities, and broader societal systems impacted by the supply chain. While the importance of such practices is increasingly recognized, firms face persistent challenges in embedding social sustainability into formal management systems. This dissertation tackles three such challenges, with a particular focus on safety in trucking—a vital yet underexamined aspect from the lens of social sustainability. Safety performance in this context is influenced by the complexities of using advanced safety technologies, the demanding and solitary nature of truck driving, and the temporal …
A Dynamic Hierarchical Attention Framework For Multimodal Malware Detection, Tamanna Nazmin
A Dynamic Hierarchical Attention Framework For Multimodal Malware Detection, Tamanna Nazmin
Graduate Theses and Dissertations
The increasing use of Android in the worldwide mobile ecosystem has come along with a significant increase in advanced malware, highlighting the critical necessity for efficient, scalable, and adaptable detection systems. Despite recent advancements in machine learning improving malware detection, the majority of current solutions are limited to one, two, or three data modalities, hence neglecting the comprehensive behavioral spectrum of contemporary multi-vector threats. This thesis presents the first comprehensive multimodal framework for Android malware detection, which combines textual, time-series (temporal), graph-based (structural), and visual information using an innovative hierarchical attention mechanism and Dynamic Fusion Controller(DFC). Our methodology consistently classifies …
Understanding Glufosinate Resistance In Palmer Amaranth And Examination Of Additives For Improved Weed Control, Pamela Carvalho-Moore
Understanding Glufosinate Resistance In Palmer Amaranth And Examination Of Additives For Improved Weed Control, Pamela Carvalho-Moore
Graduate Theses and Dissertations
The aim of this dissertation was to: 1) provide an in-depth review about the potential use of natural and synthetic glutathione S-transferase (GST) inhibitors to enhance herbicidal activity or induce crop safety; 2) determine if the addition of metabolic inhibitors to glufosinate is an effective approach to enhance weed control; 3) investigate the mechanism conferring resistance to glufosinate in a highly-resistant Palmer amaranth accession; 4) characterize the genomic rearrangement involved in glutamine synthetase 2 amplification in a Palmer amaranth accession resistant to both glufosinate and glyphosate; 5) quantify the distribution of glufosinate resistance among Palmer amaranth accessions within a 15-km …
Fpga-Based Overlay Accelerators With Massive Parallel Processing Units To Accelerate Deep Neural Networks, Ehsan Kabir
Fpga-Based Overlay Accelerators With Massive Parallel Processing Units To Accelerate Deep Neural Networks, Ehsan Kabir
Graduate Theses and Dissertations
Deep neural networks (DNNs) are widely used in applications such as classification, prediction, and regression. Various DNN architectures, such as convolutional neural networks (CNN), multilayer perceptrons (MLP), long short-term memory (LSTM), recurrent neural networks (RNN), and transformers, have become leading machine learning techniques in these applications. They require significant computational resources and have substantial memory demands due to intensive matrix-matrix multiplications and complex data flows. Hence, efficient utilization of on-chip computational and memory resources is essential to maximize parallelism and minimize latency. Designing an optimal tiling scheme that aligns effectively with the architecture is also necessary. Modern FPGAs are equipped …
Synthesis And Properties Study Of Layered Magnetic Topological Materials, Gokul Acharya
Synthesis And Properties Study Of Layered Magnetic Topological Materials, Gokul Acharya
Graduate Theses and Dissertations
The discovery of topological materials (TMs) has opened up exciting opportunities for probing fundamental physics and enhancing innovative device integrations. These materials display various exotic properties, such as large magnetoresistance, high mobility, chiral anomaly, and surface Fermi arcs. The magnetic versions of ZrSiS family, LnSbTe and LnPS (Ln = lanthanide) have attracted intensive attention as these materials provide a new platform to study interplay between magnetism, topological states, and electron correlations. The vast pool of topological materials has provided exciting avenues to precisely engineer the topological states by modulating spin-orbital coupling, electronic dimensionality, and lattice constant through element substitutions. This …
Tissue Engineered Combinatorial Therapeutics For Spinal Cord Injury Repair, Inha Baek
Tissue Engineered Combinatorial Therapeutics For Spinal Cord Injury Repair, Inha Baek
Graduate Theses and Dissertations
Traumatic spinal cord injury (SCI) lead to temporary or permanent sensorimotor deficit due to the complex and multifaceted features of the injury site, making the treatments ineffective. Recent research emphasizes the potential of combinatorial therapeutics approaches combining different therapeutics, such as biomaterials and stem cell transplantation. In this context, nerve composite hydrogels, fabricated from decellularized sciatic nerve (dSN) and spinal cord (dSC) extracellular matrices (ECM), might be promising platforms due to their biocompatibility and ability to mimic native microenvironments. In this study, we developed and characterized nerve mimetic composite hydrogels embedded with human adipose-derived stem cells (hASCs) and investigated their …
A Theoretical Investigation Of Photo-Induced Deformations And Transitions In Nanoscale Ferroelectrics, Carmel Dansou
A Theoretical Investigation Of Photo-Induced Deformations And Transitions In Nanoscale Ferroelectrics, Carmel Dansou
Graduate Theses and Dissertations
This dissertation presents a comprehensive first-principles investigation into the interaction of light with ferroelectric materials, focusing on light-induced structural responses (photostriction) and phase transitions in Ferroelectric superlattices, epitaxially strained BiFeO3 thin films, and twodimensional NbOX2 (X = Cl, Br, I) ferroelectrics. The work aims to provide microscopic insights into how light can control the lattice structure and even the crystallographic phase in these systems, with the broader goal of informing the design of light-responsive functional materials for practical technological applications. The first part explores light-induced effects in PbTiO3/SrTiO3 superlattices with different polarization orientations. Our simulations reveal that photoexcitation modifies the …
A Mobility Data-Driven Approach To Analyzing And Modeling Park Accessibility Inequities And Use In U.S. Cities, Michaelmary Chukwu
A Mobility Data-Driven Approach To Analyzing And Modeling Park Accessibility Inequities And Use In U.S. Cities, Michaelmary Chukwu
Graduate Theses and Dissertations
Urban Park accessibility inequities have been a longstanding issue globally and the United States in particular. Despite the benefits that urban parks provide, use and access is not equitably distributed among the population, often favoring historically privileged populations over others (disadvantaged). Fortunately, improvements have been made in recent years to promote balanced park distribution in some cities; however, evidence still shows that most cities are behind. Interestingly, the rise in human mobility data has facilitated the study of human behavior and use of activity spaces. This thesis advances the existing studies on park accessibility and emerging human mobility to study …
Switching Performance Optimization Of Sic Mosfets With Digital Active Gate Drivers, Liyang Du
Switching Performance Optimization Of Sic Mosfets With Digital Active Gate Drivers, Liyang Du
Graduate Theses and Dissertations
Silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs) have extensive applications in high-power density devices, but they exhibit quick switching transients that are problematic, including electromagnetic interference (EMI), voltage overshoot, and current imbalance between paralleled devices. The purpose of this dissertation is to maximize the switching performance of SiC MOSFETs using digital active gate drivers (AGDs). A three-level gate driving approach is presented to improve current sharing in paralleled SiC MOSFETs through turn-on voltage and gate signal delay adjustment. Closed-loop control with real-time feedback ensures high-reliability operation. For better practicability, a compact AGD structure of a single-path Class-B amplifier-based topology is …
Urbanization, Climate Change, And Water Quality In Northwest Arkansas Caves, Eliezer Ugarte
Urbanization, Climate Change, And Water Quality In Northwest Arkansas Caves, Eliezer Ugarte
Graduate Theses and Dissertations
The Ozark Cavefish is one of multiple species of conservation concern found in Cave Springs Cave and Logan Cave in Northwest Arkansas (NWA). Over the past two decades, the urbanization of NWA has negatively impacted the recharge areas of both caves, and in turn the water quality of both cave streams. The changing climate has also altered temperature and precipitation, which influence many aspects of karst groundwater. These effects are shown in the historical water quality records for both caves. However, these records are from varied sources and have never been comprehensively compiled and analyzed. This thesis approaches the issue …
Exploring The Relationship Between Grit, Burnout, And Academic Success Among First-Year Osteopathic Medical Students During Fundamentals Of Anatomic Science I Course, Heather Guzik
Graduate Theses and Dissertations
Burnout is a significant issue among healthcare professionals. Burnout refers to the mental, emotional, and physical exhaustion that can develop throughout one’s career or studies. It can affect professionalism and patient care (National Academies of Sciences, Engineering, and Medicine: National Academy of Medicine, 2019). Studies have shown that burnout begins early in an individual's medical education and can increase throughout their training (Voltmer et al., 2021). It has been suggested that students with a high level of Grit may exhibit some resistance to burnout (Jumat et al., 2020; Lee et al., 2022). This noncognitive trait measures a person’s ability to …
Nanoparticle Iron Based Catalysts For Clean Water And Other Applications, Shelby Lynn Foster
Nanoparticle Iron Based Catalysts For Clean Water And Other Applications, Shelby Lynn Foster
Graduate Theses and Dissertations
This dissertation explores the development, characterization, and application of iron-based catalysts for environmental remediation and energy generation. The research focuses on Fe-based nanomaterials for water purification, electrochemical ammonia production, and ethanol oxidation enhancement. The first section of the dissertation investigates the removal of water contaminants using nickel-iron (NiFe) bimetallic nanoparticles. Various NiFe ratios were synthesized and tested for their efficiency in degrading the azo dye (Orange G), with lower Ni content formulations achieving 80–99% dye removal within 60 minutes. Results show that changing the molar ratio of nickel to iron caused different removal rates, as well as the extent of …
Assessment Of Social Media Use And Strategies For Combating Misinformation Among Extension Educators In Arkansas, Enoch Teye Kwao Ametepey
Assessment Of Social Media Use And Strategies For Combating Misinformation Among Extension Educators In Arkansas, Enoch Teye Kwao Ametepey
Graduate Theses and Dissertations
This study assessed the use of social media by Extension educators in Arkansas and examines strategies for identifying and combating misinformation within agricultural extension services. Guided by the Uses and Gratifications Theory, the Unified Theory of Acceptance and Use of Technology (UTAUT), and the Third-Person Effect Theory for objectives one, two, and three, this research employed quantitative and qualitative approaches, specifically, two quantitative cross-sectional surveys and a qualitative focus group study developed into a three article dissertation. The first article assessed the extent to which Extension educators utilize social media for professional activities, revealing that social media is predominantly used …
Comparative Study On The Long-Term Performance Of Bmd Mixtures Prepared Using Different Sample Preparation Techniques And Superpave Mixtures Under Varying Pavement Structures, Amarjeet Tiwari
Graduate Theses and Dissertations
Asphalt mix design has advanced significantly since the 1930s, with Balanced Mix Design (BMD) emerging to address durability concerns found in the Superpave method by optimizing binder content based on performance criteria. The performance of bituminous mixtures can be assessed through laboratory testing. These tests require proper sample preparation, and various techniques are employed for this purpose. Understanding the differences between these techniques is essential for the successful application of bituminous mixtures in the field. The objective of this study is to assess the differences in the predicted long-term performance of two sample preparation techniques, Lab Mix Lab Compacted (LMLC) …
Analysis And Predictive Modeling Of Stall And Spin Accidents In General Aviation Fixed-Wing Aircraft, Mehedi Hasan
Analysis And Predictive Modeling Of Stall And Spin Accidents In General Aviation Fixed-Wing Aircraft, Mehedi Hasan
Graduate Theses and Dissertations
Stall and spin accidents represent a persistent safety concern in General Aviation, with approximately 41% resulting in fatalities despite their relatively low occurrence. This study analyzes 1,079 General Aviation stall and spin accidents from 2008 to 2023 using the National Transportation Safety Board accident database. Our analysis identified the top phases of flight, injury outcomes, and causal factors in stall/spin accidents. Findings indicate that over 93% of stall/spin events involved General Aviation aircraft, with most accidents occurring during initial climb, takeoff, or low-altitude maneuvering. Pilot-related control errors, especially poor airspeed and angle-of-attack management, were the most common causes. To assess …
Engineered Interfaces For Enhanced Transient Liquid Phase Bonding In Electronics Assembly, John Russell Harris
Engineered Interfaces For Enhanced Transient Liquid Phase Bonding In Electronics Assembly, John Russell Harris
Graduate Theses and Dissertations
Growing applications in transportation make power density a key optimization target in the power electronics industry. More power in a shrinking environment leads to high heat flux and junction temperatures that damage silicon-based switching devices. Temperatures approaching 175℃ can result in false triggering of the device’s activated state, resulting in short circuits. Developing wide bandgap semi-conductors, such as gallium nitride and silicon carbide, are less susceptible to this complication as the energy from elevated temperature is a smaller fraction of what would be required to trigger the device. These devices are projected to function reliably in environments of up to …
Photochemical Fabrication And Tribological Evaluation Of Hexagonal Grooves With Corner Dimples On Cast Iron Surfaces, Steven Sonntag
Photochemical Fabrication And Tribological Evaluation Of Hexagonal Grooves With Corner Dimples On Cast Iron Surfaces, Steven Sonntag
Graduate Theses and Dissertations
The traditional honing process used to texture cylinder liners in internal combustion engines has long been recognized as suboptimal, as evidenced by the need for a break-in period before achieving peak performance. Although laser-based methods can produce micro-scale features with high precision, they are often cost-prohibitive and difficult to scale for large or complex components. This study explores photochemical machining (PCM) as a low-cost, scalable alternative for fabricating high-resolution surface textures—specifically, hexagonal grooves with corner dimples—on gray cast iron. The resulting textures exhibit uniform groove widths (~13 μm) and varied depths, demonstrating PCM’s capability to create high-resolution patterns with sub-micron …
High-Resolution Energy Efficient Selective Laser Sintering Of Copper Nanoparticles, Bo Shen
High-Resolution Energy Efficient Selective Laser Sintering Of Copper Nanoparticles, Bo Shen
Graduate Theses and Dissertations
Copper (Cu) is widely utilized in electronics and photonics applications due to its outstanding electrical and thermal conductivity. With increasing demand for miniaturization and higher precision in modern manufacturing, traditional selective laser sintering (SLS) techniques designed primarily for high-throughput production are becoming insufficient. These conventional methods struggle to deliver the resolution required for micro-scale fabrication and often cause thermal damage to sensitive substrates. Therefore, there is a growing necessity to develop compact and high-resolution laser sintering systems capable of precise microfabrication with minimal thermal influence. This study addresses this challenge by investigating nanosecond pulsed laser sintering as a method to …
Layered Redactions: An Arts Based Research And Self Study Handbook For Art Teachers Navigating Professional Learning Communities, Audrea M. Danenhauer
Layered Redactions: An Arts Based Research And Self Study Handbook For Art Teachers Navigating Professional Learning Communities, Audrea M. Danenhauer
Graduate Theses and Dissertations
This self-study contributes to the field of art education by examining the tensions and possibilities within Professional Learning Communities (PLCs) through an arts-based lens. Framed as both a love letter and a palimpsestic work, this thesis reimagines professional development as a layered, living practice, rooted in collective care and criticality. Using collage as both method and metaphor, the study interweaves Freire’s dialogic praxis, bell hooks’ radical tenderness, and the marginalia of a weathered PLC handbook—redacted, annotated, and reassembled with lived experience. Through deliberate redaction and reassembly, the research intentionally disrupts the normative invisibility of whiteness in educational structures, making visible …
Design, Modeling, Control, And Analysis Of A Modular Two-Wheeled Self-Balancing Robotic System, Mishek Jair Musa
Design, Modeling, Control, And Analysis Of A Modular Two-Wheeled Self-Balancing Robotic System, Mishek Jair Musa
Graduate Theses and Dissertations
Two-wheeled self-balancing robots have garnered substantial attention within the realms of research and innovation in academia and industrial settings. In particular, advances in control algorithms, machine learning, reinforcement learning, and sensor technologies have played a pivotal role in their development. Although primarily recognized for their utility in personal transportation in the commercial sector, these robots possess potential applications across various domains, including search and rescue, healthcare, material handling, logistics, etc., due to their active stabilization and exceptional maneuvering capabilities. A particular area of interest lies in the creation of modular self-balancing robots designed for seamless reconfiguration and enhanced human interaction. …
The Future Research Direction Of Cgiar: Lessons Learned From One Cgiar, Katie Loethen
The Future Research Direction Of Cgiar: Lessons Learned From One Cgiar, Katie Loethen
Graduate Theses and Dissertations
Since its founding in 1971, CGIAR (formerly the Consultative Group on International Agricultural Research) has been at the forefront of agricultural innovation, credited with launching the Green Revolution and delivering 1.78 trillion USD in net present value (NPV) benefits globally, particularly in low- and middle-income countries. Despite these accomplishments, CGIAR now faces internal and external pressures that threaten its future impact. The 2019 reorganization into “One CGIAR” aimed to enhance coordination but has been criticized for adding bureaucracy and reducing scientific autonomy. Simultaneously, public funding for agricultural research is shrinking, while private sector investment often overlooks low-margin, high-need areas central …
The Upcoming Moral Crisis In Primitive Artificial Intelligence, Justin E. Edens
The Upcoming Moral Crisis In Primitive Artificial Intelligence, Justin E. Edens
Graduate Theses and Dissertations
As we continue to develop artificially intelligent systems, there is an increasingly high chance that we will develop a system that is both conscious and capable of suffering. Furthermore, it is likely that the development of this conscious machine will be entirely unintentional. While this machine will have moral status, identifying it will be extremely difficult, leading to it being treated the same as its inert predecessors. For these reasons I believe that a crisis in ethics is looming. This paper aims to argue that it is possible for a machine to have moral status, that the first such machine …
Analysis Of The Scleroderma / Systemic Sclerosis Etiopathology Using The University Of California At Davis (Ucd)-Ssc Chicken Line, Angeline E. Rodriguez
Analysis Of The Scleroderma / Systemic Sclerosis Etiopathology Using The University Of California At Davis (Ucd)-Ssc Chicken Line, Angeline E. Rodriguez
Graduate Theses and Dissertations
Scleroderma/Systemic Sclerosis (SSc) is a multifaceted autoimmune disorder affecting approximately 300,000 people in the United States. Main features include vasculitis, immune dysfunction (innate and adaptive), autoantibody production, perivascular leukocyte infiltration, and extensive tissue fibrosis. The University of California, Davis (UCD) SSc chicken line was shown to exhibit all clinical and biological manifestations of human SSc. One early and distinctive clinical sign in both humans and UCD-SSc chickens is Raynaud’s phenomenon (RP), characterized by decreased blood flow in extremities and skin lesions. RP-like lesions develop in combs of UCD-SSc chickens within one- to two-weeks post-hatch, progressing from erythema and edema to …
Simulation- And Machine Learning-Based Methods For Inland Waterway Operation And Maintenance Decision-Making, Maryam Aghamohammadghasem
Simulation- And Machine Learning-Based Methods For Inland Waterway Operation And Maintenance Decision-Making, Maryam Aghamohammadghasem
Graduate Theses and Dissertations
The U.S. inland waterway transportation system (IWTS) is an essential part of the country's multimodal freight transportation network. In addition to seasonal droughts and floods, the operations of the IWTS may be disrupted by random malfunctions and scheduled maintenance of its critical components. Among these critical components, locks play a key role in the operation of navigable inland waterways, and lock-induced disruptions to the supply chains of related industries, such as agriculture and manufacturing, often result in significant economic losses. To assess the performance of the U.S. IWTS, we develop a PyNetLogo simulation tool to capture the movements and delays …
Engineering Properties And Stress-Strain Behavior Of Bcsa Concrete: Flexural Design Parameters, Strain Measurement Methods, And Models, Gabriel R. Johnson
Engineering Properties And Stress-Strain Behavior Of Bcsa Concrete: Flexural Design Parameters, Strain Measurement Methods, And Models, Gabriel R. Johnson
Graduate Theses and Dissertations
Belitic calcium sulfoaluminate (BCSA) cement concrete has gained popularity due to advantages over portland cement (PC), including, its fast-setting, high early strength gain, high durability, and reduced global warming potential. Though primarily used for pavement repair, it has good potential for structural applications. Building codes like ACI 318:19 permit alternative cement materials like BCSA cement if they can be shown to have adequate and predictable structural, durability, and fire performance comparable to PC concrete. This study evaluates the structural and mechanical behavior of BCSA cement concrete, measuring standard engineering properties and comparing results to PC concrete and code prediction equations. …
Between Compliance And Commitment: Community College Administrators And The Politics Of Dei Policy Implementation, Carol Birth
Between Compliance And Commitment: Community College Administrators And The Politics Of Dei Policy Implementation, Carol Birth
Graduate Theses and Dissertations
This qualitative case study explores how community college administrators navigate the complex and politically charged landscape of diversity, equity, and inclusion (DEI) policy implementation in the face of evolving state legislation. Grounded in Michael Lipsky’s theory of Street-Level Bureaucracy, the research examines how mid- to senior-level administrators perceive their interpretations, mediations, and actions on DEI mandates in contexts where such policies are contested or pressured. Using semi-structured interviews with administrators across multiple community colleges, the study investigates the tension between institutional commitment to DEI values and the necessity to comply with external political and legal directives. The study contributes to …
Automated Chick Sexing Using Computer Vision, Marta Veganzones Rodriguez
Automated Chick Sexing Using Computer Vision, Marta Veganzones Rodriguez
Graduate Theses and Dissertations
This thesis presents two complementary approaches to chick sexing, a critical task in poultry production that demands accurate and early gender identification. By investigating both facial and vent-based modalities, we present two complementary methods that aim to improve the efficiency, scalability, and ethical standards of gender classification in day-old chicks through the use of computer vision and deep learning. The first approach draws inspiration from human facial gender recognition to introduce facial chick sexing, a minimally invasive technique that eliminates the need for expert knowledge. This system encompasses a complete pipeline that includes image acquisition, facial detection and alignment, keypoint …