Digital Commons Network^™

An Argument Against Positivist Separability, Nichalus Zoltan Vali

Electronic Theses and Dissertations

One of the most influential views associated with legal positivism is that of the separability thesis. Primarily associated with H.L.A Hart, this thesis is widely understood to be the view that there is no necessary connection between law and morality. However, John Gardner takes this to be a naïve interpretation of separability that fails to adequately characterize legal positivism and which Hart himself did not endorse. Instead, Hart and other legal positivists were committed to the view that whether a norm is legally valid depends on its sources (i.e., social facts such as official engagement with the norm) and not …

Single Versus Dual Response Demands In An Event-Based Prospective Memory Task With Context, Anne Elizabeth Vogel

Electronic Theses and Dissertations

Prospective memory (PM) refers to memory for future-based intentions. Previous research has explored how contextual information can support PM performance by lowering the cost to the ongoing task. For example, a study by Smith et al. (2017) demonstrated that knowing the contextual information of proximity to PM targets can affect attentional resource allocation. This was seen empirically as faster reaction times (RTs) when participants knew they were far from the target location, but longer RTs as participants knew they were approaching a target location. However, Vogel and Smith (in prep) found discrepancies in this pattern. This current study investigated these …

Atomistic Simulation Of Pfas And Graphene: Interactions For Water Applications, Bashar Moufeed Awawdeh

Electronic Theses and Dissertations

The contamination of drinking water by per- and polyfluorinated alkyl substances (PFAS) is a global issue. PFAS have been widely utilized in a variety of applications, including water and stain-resistant coatings, fire suppression foams, cosmetics, paints, and adhesives. They have been detected in soils and rivers globally due to their widespread use and resistance to degradation. The strong C–F bonds of PFAS make them exceedingly stable and hard to remove. In order to remediate PFAS contamination in the environment, it is essential to develop selective adsorbent materials that can effectively capture a wide range of PFAS structures. On April 10, …

Explainable Ai For Neural Text Classification Models: Robustness And Knowledge Locality, Christopher Burger

Electronic Theses and Dissertations

Powerful but complex models have seen extensive adoption within recent years due to their performance across a wide range of tasks. However, this effectiveness has come at the cost of a limited understanding of how exactly these models make their decisions. This lack of understanding has justifiably slowed integration of these models within domains where serious consequences can result due to error like medicine or finance. In response, the discipline of explainable AI (XAI) has arisen to provide justification for why these models work the way they do. One of the most prominent tools in XAI has been the local …

Performance Of A Selective Amplify-And-Forward Scheme For Two-Users With Two-Relays In Rayleigh Fading And Log-Normal Shadowing Channels, Mahdia Tahsin

Electronic Theses and Dissertations

Relays serve as virtual antennas in wireless networks, fostering spatial diversity between the source and destination to enhance coverage, signal quality, and network reliability. Among the various relay-assisted communication approaches, amplify-and-forward (AF) is widely favored for its reduced computational complexity. The selection of an optimal relay is crucial for maximizing network performance, constituting a significant challenge in wireless communication. Hence, optimal relay selection has emerged as a pivotal area of research. In this thesis, we investigate the potential benefits of implementing relay selection schemes in AF relay networks featuring two source-destination pairs and two relays. Our analysis focuses on two …

Perceived Linguistic And Non-Linguistic Barriers Facing Saudi Female Partners Learning English, Samah Mohamad Dulli

Electronic Theses and Dissertations

The partners of the Saudi students who come to the United States on scholarships to earn a degree (Bachelor's, Master's, or Ph.D.) are eligible for full scholarships as well. However, most of them fail to proceed in earning a degree or fulfill the language proficiency requirement needed to join an academic degree program. This study surveys between 10 to 20 adult female partners of Saudi university students to elicit their opinions on how much English they think they will learn during their partner scholarship time in academic and non-academic settings. This study investigates the female partners of the Saudi degree …

Punishing Poverty: An Examination Of Financial Disadvantage And Out-Of-School Suspension, Joshua Rosenbaum

Electronic Theses and Dissertations

School suspension is often a response by officials to address deviant behavior within the school setting. While studies have examined various causes and consequences of school suspension, there is a dearth of literature focusing on the effects of financial disadvantage on school discipline (i.e., school suspension). Given that out-of-school suspension is a reliable predictor of juvenile justice involvement later in life, it serves as an important outcome variable in preventative criminology. Using data from the National Longitudinal Study of Adolescent to Adult Health (Add Health), the purpose of the current study is to analyze the relationship between financial disadvantage and …

An Evaluation Of Comprehensive Professional Development Program To Improve Teacher Quality And Student Engagement, Elois R. Nicholson-Booker

Electronic Theses and Dissertations

The purpose of this applied research study, using program evaluation, was to improve professional development for teachers to build their capacity in student engagement. This applied research study used three elements: professional development, professional learning communities, and observation-feedback, to improve teacher quality and to increase student engagement. The goal of the professional development element was to increase teacher capacity in student engagement by equipping teachers with research-based strategies to implement in individual classrooms. The goals of the professional learning communities (PLCs) was to support teachers in implementing research-based strategies to increase student engagement and to increase the level of collaboration …

Bacterial Metallophores As Potential Agents In Heavy Metal Bioremediation, Mohammed Ahmed

Electronic Theses and Dissertations

Heavy metal pollution is a significant threat to human health and the environment. Bacteria have evolved diverse mechanisms to adapt to these pollutants, including the secretion of small molecules called metallophores. Bacterial metallophores are metabolites excreted in response to toxic metal stress to protect the bacterial cell. These small molecules have shown versatility in potential applications for the remediation of heavy metals. This research focuses on constructing a library of bacterial metallophores, which will facilitate the assessment of their metal-binding properties when exposed to different metals. The study has two main areas of investigation: Firstly, it involves isolating and characterizing …

Examining The Relationship Between Toddlers’ Sleep Patterns, Negative Parenting, And Executive Function, Morgan Elizabeth Harris

Electronic Theses and Dissertations

Negative parenting can often be described as having three domains (i.e., laxness, verbosity, and over-reactivity, Arnold et al., 1993; Rhoades & O’Leary, 2007), which may have relations to toddlers’ behaviors, like executive function (EF) and sleep. However, this field is understudied, especially in early childhood development. One possible explanation for the lack of research in this field is that it can be difficult to study executive function in toddlers due to variability in the stability of regulatory behaviors and emerging regulatory abilities at this age range. Although positive sleep patterns (e.g., quality and quantity) have been linked to executive function, …

Combined In Silico And Experimental Approaches Of Pharmacognosy To Resolve Complex Natural Product Issues, William Michael Neal

Electronic Theses and Dissertations

Since the identification of useful bioactive natural products can often involve tedious dereplication measures to decipher complex mixtures, much emphasis is placed on methods that can effectively characterize natural products. Several in silico methods, such as quantitative structure-activity relationships (QSARs), molecular docking, and quantum calculations, provide researchers with valuable tools to overcome the challenge of complex natural product mixtures. To exemplify the abilities of computational methodologies to further the field of pharmacognosy, this dissertation elaborates on several research projects involving computational approaches in pharmacognosy, including: (1) global assessment of pregnane X receptor (PXR) agonism via multiple QSAR models, (2) differentiation …

Essays On The Greek Debt Crisis And The Welfare Paradox In The Lucas Natural Rate Model, Liandong Yang

Electronic Theses and Dissertations

This dissertation includes two projects, one on the Greek debt crisis and the other on the welfare in the Lucas natural rate model.

The first chapter discusses the origin of Greek debt crisis. The Greek debt crisis stands out as a compelling case study of a severe financial crisis in a developed country within a currency zone. Despite the abundance of literature on the subject, the significance of debt accumulation in the 1980s is often overlooked, and details are frequently omitted. Through an analysis of data gathered from Greek government’s public finance statistical yearbooks spanning from 1962 to 2008, I …

Designing Ris-Assisted Uav 3d Trajectory Using Deep Reinforcement Learning, Linsong Li

Electronic Theses and Dissertations

Unmanned aerial vehicles (UAVs) are increasingly employed as temporary base stations or access points to facilitate data transfer between ground terminals (GTs). However, in urban environments, UAV-GT communication links often face challenges due to obstructions from buildings and other obstacles, resulting in reduced data transfer efficiency. Reconfigurable intelligent surfaces (RIS) provide a promising solution by reflecting signals to enhance communication quality between UAVs and GTs. This thesis addresses the critical challenge of responsive UAV trajectory optimization in RIS-assisted communication networks. A novel approach is proposed, integrating federated learning with reinforcement learning techniques, specifically Double Deep Q-Network (DDQN) and Deep Deterministic …

Apartments, Michael Pontacoloni

Electronic Theses and Dissertations

The following poems engage with themes of placemaking in the twenty-first century. A critical introduction centers the accompanying poems within a developing tradition of poetry in the twenty-first century that challenge common conceptions of home, romantic relationships, and transience. Other topics approached in the poems include adolescence, the environment, sport, and friendship.

The Impact Of Perception Of L1 Stress Features On L2 Perceived Fluency, Tian Zhang

Electronic Theses and Dissertations

This study investigated the influence of stress on perceived fluency, a critical dimension of fluency study, alongside utterance and cognitive fluency. Perceived fluency is defined as the inferences listeners make about speakers’ cognitive fluency based on their perceptions of utterance fluency (Segalowitz, 2010). Previous research demonstrated that factors such as pause phenomena and speech rate significantly affected subjective fluency ratings (Bosker et al., 2012; Kahng, 2018). Stress was also identified as a contributing factor through qualitative analysis (Préfontaine and Kormos, 2016), yet had not been thoroughly examined using quantitative methods.

The cue-weighting theory of speech perception suggests that listeners from …

Juvenile Coping And General Strain Theory, Peyton Conner Stephenson

Electronic Theses and Dissertations

The purpose of this study is to quantitatively assess the impact of victimization on behavioral and emotional outcomes among a sample of adolescents detained within the juvenile justice system. Specifically, the study focuses on understanding the relationship between reports of victimization (e.g., being beaten up or threatened) and maladaptive coping mechanisms, such as involvement in fighting. To do so, Agnew’s (1992) General Strain Theory (GST) and the Pains of Imprisonment are adopted as frameworks for understanding the role of strain or stressors in prompting deviant behavior as a coping mechanism. This study uses secondary data from the Northwestern Juvenile Project …

Grace Satellite Spatial Resolution Downscaling Using Machine Learning: Methods And Applications, Abdel Rahman M. Awawdeh

Electronic Theses and Dissertations

The Gravity Recovery and Climate Experiment (GRACE) satellite mission has been instrumental in advancing our understanding of global water dynamics, providing unprecedented insights into terrestrial water storage (TWS). Despite its revolutionary contributions, the coarse spatial resolution of GRACE data (~300 km² grids) limits its utility for local-scale water resource management, particularly in regions requiring detailed hydrological analysis such as the Mississippi Delta. This dissertation addresses this limitation by developing and validating machine learning models to enhance the spatial resolution of GRACE data, thereby facilitating more precise and effective local water management strategies.

This research first establishes a comprehensive background in …

Developing And Validating A Novel Screening Instrument For General Psychological Distress, Steven M. Bishop

Electronic Theses and Dissertations

This study presents the results of both factor analyses in developing the General Psychological Distress Screener (GPDS), and provides preliminary data of its predictive validity. As a new screening instrument, the GPDS assesses mental fatigue and emotional distress in adults and predicts certain psychiatric disorder diagnoses. Drawing upon network analysis principles, two studies were conducted to construct and refine the GPDS. Study 1 identified the variable constructs from psychopathology networks that were used in Study 2. Study 2 used principal axis factoring to develop a 4-factor solution, which was subsequently reduced to a 2-factor model for improved interpretability. Confirmatory Factor …

Godspeed: American Evangelicals And The Space Race, Kari Edwards

Electronic Theses and Dissertations

When the Space Race between the United States and the Soviet Union erupted in 1957 with the launch of the Sputnik 1 satellite by the Soviets, Americans were forced to face a disturbing new reality: the world had changed, humanity had reached into space, and the United States had not been the first nation to accomplish such a feat. In a Cold War climate dominated by religious concepts of good versus evil, American evangelicals approached the birth of space exploration with some reluctance, unsure whether such magnificent feats were truly blessed by God and struggling to come to terms with …

The Effects Of Technology-Enhanced Learning On Radiologic Sciences Student Engagement, Zack Gray

Electronic Theses and Dissertations

This dissertation investigates the multifaceted connection between technology-enhanced learning (TEL) and student engagement, with a specific emphasis on student perceptions, attitudes, and distractions associated with technology usage in the classroom. Recognizing the increasing prevalence of technology in educational settings, this study seeks to understand how students perceive technology in the learning environment and how these perceptions influence their attitudes toward its use. The research framework is anchored in the Theory of Planned Behavior (TPB), providing a theoretical lens to assess the cognitive factors influencing student behavior.The study employs a mixed-methods approach, combining surveys and observations to gather comprehensive insights into …

Weak Disorder Limit On Diamond Hierarchical Graphs With Vertex Disorder In The Critical Case, Casey Reid Lochridge

Electronic Theses and Dissertations

We compare three models for a directed polymer in a random environment (DPRE): the rectangular lattice, the branching lattice, and the diamond hierarchical lattice. Our focus is primarily on the diamond model, in which the polymers traverse a recursively defined diamond graph with a random environment composed of random variables indexed by the vertex set. The diamond graphs are constructed iteratively according to a given branching parameter b ∈ {2, 3, 4, . . .} and segmenting parameter s ∈ {2, 3, 4, . . .}, and our main result concerns the critical case b = s. In this case, …

Southern Animals: Multispecies Encounters In Midcentury Southern Fiction, Kacee M. Mckinney

Electronic Theses and Dissertations

This dissertation expands our understanding of how nonhuman animal figures, symbols, and encounters within southern literature have had ideologically profound impacts on our conceptions of humanity, southernness, and relationality. This dissertation examines prose fiction, including short stories, novellas, and novels, from four influential southern writers—Richard Wright, Carson McCullers, Tennessee Williams, and Flannery O’Connor—who were all actively engaged with representing, critiquing, and expanding American conceptions of the south, the nation, and the ‘human’ at midcentury. With an understanding of southern literature as a rich site for not only regional representation but also broader disruptions of national injustices and ideologies of domination …

Improving American Learners’ Pronunciation Of Arabic Pharyngeals: Traditional Vs. Tbi Method, Yasmine Sedeek

Electronic Theses and Dissertations

Mastering the phonological aspects of a second language (L2) poses significant challenges for adult learners, often affecting their intelligibility in acquiring that language (Derwing, Munro, & Wiebe, 1998). McAllister (1997) has highlighted L2 learners’ struggles in perceiving and producing novel segmental features, which is corroborated by The Perceptual Assimilation Model of L2 speech learning (PAM-L2) proposed by Best & Tyler (2007), which posits that the perception of L2 phonetics is a critical precursor to their accurate production. Against this backdrop, the present study aims to improve the intelligibility of Arabic pharyngeals (/ʕ/ and /ħ/) among English-speaking learners studying Arabic as …

Evaluation Of Male And Female Performance And The Role Of Cerebellar Lesions And Local Aromatase Inhibition In Motor And Cognitive Tasks In The Zebra Finch (Taeniopygia Castanotis), Mathew Joseph Thibodeaux

Electronic Theses and Dissertations

Most studies involving sex differences in songbirds are devoted to song learning and development. However, songbirds, such as zebra finches, are excellent models for studying general roles of steroids on behavior post-brain injury because they have high degrees of adult neuroplasticity and neurosteroidogenesis. The role of estradiol (E2) in recovery of function after neural insults in mammals has been well-studied for decades. Only recently has the role of E2 and aromatase in neuroprotection been examined in songbirds, and our lab is one of the few to study the role of E2 and aromatase in behavioral recovery and the only to …

Nutrient Intake, Performance, And Body Composition In Preseason Wrestlers, Gregory Coapstick

Electronic Theses and Dissertations

BACKGROUND: College athletes, especially in weight class sports, often experience energy deficits. Weight class sports such as wrestling are at greatest risk for deficiencies, and little is known about the relationships between body composition, nutrient intake, and performance in these athletes.
OBJECTIVES: The purposes of this study were to quantify macronutrient and micronutrient intake of pre-season male collegiate wrestlers and compare to recommendations, and examine relationships among nutritional intakes, body composition, and performance measurements of strength, anaerobic, and aerobic capacity.
METHODS: Male Division I wrestlers (n=11, mean ± SD age: 21.3±1.7 years, wrestling experience: 14.9±2.5 years) were recruited during preseason. …

Contrastive Learning, With Application To Forensic Identification Of Source, Cole Ryan Patten

Electronic Theses and Dissertations

Forensic identification of source problems often fall under the category of verification problems, where recent advances in deep learning have been made by contrastive learning methods. Many forensic identification of source problems deal with a scarcity of data, an issue addressed by few-shot learning. In this work, we make specific what makes a neural network a contrastive network. We then consider the use of contrastive neural networks for few-shot learning classification problems and compare them to other statistical and deep learning methods. Our findings indicate similar performance between models trained by contrastive loss and models trained by cross-entropy loss. We …

Optimizing Large Language Models And Multimodal Approaches For Biomedical Publication And Satellite Imagery, Youngsun Jang

Electronic Theses and Dissertations

This dissertation comprises two main sections: the first focuses on natural language processing (NLP) for extracting key information from scientific literature using large language models (LLMs), and the second addresses remote sensing for detecting natural disasters, such as floods, from satellite imagery using a multimodal approach. The first section investigates methods to enhance Transformer-based models in classifying and extracting information from biomedical scientific publications. Key contributions include the development of a custom dataset for classification and Question and Answering (Q&A) tasks, fine-tuning Transformer models like the Bidirectional Encoder Representations from Transformers (BERT) and addressing multi-span answer issues with the TAg-based …

Whole Genome Crispr-Cas9 Screens Identify Genes Contributing To Viral Entry And Phagocytosis, Md Saddam Hossain

Electronic Theses and Dissertations

CRISPR/Cas9 is a revolutionary technique for genome editing where Cas9 nucleases can be targeted to specific genomic sites by single-guide RNAs (sgRNAs) containing roughly 20-nucleotide sequences that are complementary to the target region. Double strand breaks created by Cas9 are repaired through non-homologous end-joining (NHEJ) in most cells, resulting in insertions and deletions leading to frame shift mutations in coding regions. Thus, the CRISPR-Cas9 system can be exploited for systematic evaluation of gene function relationships by whole genome screening. We also developed a CRISPR whole‐genome screen and counter‐screen strategy based on a pseudoviral platform that allowed identification of genes specific …

Development Of Bed Shear Stress In Open Channel Flow In Smooth-To-Rough And Rough-To-Smooth Transitions, Linet Chietunda Paul

Electronic Theses and Dissertations

The study of flows over sudden change in bed roughness in open channels is important in understanding the flow dynamics of a developing boundary layer. Parameters such as shear velocity, mean flow velocity, turbulence intensity and the Reynolds stress distribution are critical in channel design optimization and predicting sediment transport. In this thesis, a detailed examination of the distribution of these parameters is undertaken in a rough-to-smooth and smooth-to-rough transition. Laboratory experiments were conducted on rough-to-smooth transition (Case A) and smooth-to-rough transition (Case B) in an open channel flume. Measurements of the fluid velocity fields at the centerline of the …

Title Character: A Novel, Di Bei

Electronic Theses and Dissertations

Inspired by true events, Title Character: A Novel tells the intimate and fraught relationships of Asian female artists during a pandemic in Idaho: Jade, a rebellious girl born amid the one-child policy in Beijing, writes her love story into a script; Pearl, an ambitious actress raised in rural China, stars in Jade’s film and dates the method actor who plays her lover. Strung together by one film, young women of the Asian diaspora mirror and maneuver each other, while playing out their performances of self with art as their arena.