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Volume Status Detection With Integral Pulse Frequency Modulation Model Of Peripheral Venous Pressure, Jeremiah Rhys Wimer
Volume Status Detection With Integral Pulse Frequency Modulation Model Of Peripheral Venous Pressure, Jeremiah Rhys Wimer
Graduate Theses and Dissertations
This thesis studies the effectiveness of utilizing a modified integral pulse frequency modulation (IPFM) algorithm to synthesize peripheral venous pressure (PVP) waveforms for the detection of several physiological conditions using logistic regression. PVP waveforms are collected from 18 human patients and 4 porcine subjects. Human data are used to train models for determining the hypovolemic status of the patient, while the porcine data are used to train models for determining level of anesthesia and detecting internal hemorrhaging. In the human dataset, the waveforms collected from the 18 patients are classified into two groups according to serum chloride levels: resuscitated (≥100 …
Next-Generation Salmonella Inactivated Vaccine Platforms And Phytobiotic-Modulated Immune Responses In Poultry, Santiago Uribe Diaz
Next-Generation Salmonella Inactivated Vaccine Platforms And Phytobiotic-Modulated Immune Responses In Poultry, Santiago Uribe Diaz
Graduate Theses and Dissertations
Here, a comprehensive understanding of immune responses triggered by either a multimeric CD40 receptor-agonistic DNA aptamer-based or mannosylated chitosan-based Salmonella Enteritidis inactivated vaccine platforms, along with phytobiotic supplementation as an immune modulatory strategy in response to Salmonella lipopolysaccharides, is presented. This dissertation supports the development of next-generation Salmonella vaccine platforms that simultaneously stimulate both protective cell-mediated and humoral immune responses, while indicating the potential immunomodulatory effects of phytobiotics supplementation to reduce the immunological impact of Salmonella lipopolysaccharides in chickens. The first chapter describes that both vaccine platforms administered in broiler chickens initiated local inflammatory responses, recruiting heterophils and macrophages from …
Social Support And Depression In Latinx Youth: A Meta-Analysis, Dulce Diaz Benitez
Social Support And Depression In Latinx Youth: A Meta-Analysis, Dulce Diaz Benitez
Graduate Theses and Dissertations
Although previous meta-analyses have found significant relationships between social support and youth outcomes, neither has included ethnicity as a moderator or even described the ethnic breakdown in the studies analyzed (Chu et al., 2010; Rueger et al., 2016). Studies that have looked at the relationship between social support and outcomes in Latinx youth have found mixed findings. This study examined the relationship between social support and depression in Latinx youth living in the United States. This study also explored differences in the strength of the relationship between social support and depression in several previously studied moderators (function of social support, …
Effects Of Injectable Trace Mineral Timing On Calf Performance And Health Indicators, Marie E. Goulais
Effects Of Injectable Trace Mineral Timing On Calf Performance And Health Indicators, Marie E. Goulais
Graduate Theses and Dissertations
One hundred and fourteen calves (average BW= 224kg ± 89kg) were utilized to evaluate the effects of injectable trace mineral (ITM) administration on calf performance and health when administered pre-weaning and at weaning. Calves were blocked by sex, stratified by age, and randomly assigned to one of the following treatment groups: 1) no ITM injection (CON), 2) ITM administered 28 d before weaning (PW), or 3) ITM administration at weaning (WEAN). Calves were vaccinated against respiratory pathogens on D-28 and D0. At weaning, cattle were transported to a local auction market, held overnight and returned the following morning. Body weight …
Validation Of Diagnostic Markers And Linkage Mapping In Vitis × Muscadinia Hybrids, Isabella Vaughn
Validation Of Diagnostic Markers And Linkage Mapping In Vitis × Muscadinia Hybrids, Isabella Vaughn
Graduate Theses and Dissertations
The Vitis genus comprises two subgenera, Vitis (2n = 38) and Muscadinia (2n = 40), both cultivated for wine, juice, and fresh-market fruit. Vitis vinifera cultivars produce high-quality fruit but are highly susceptible to diseases endemic to the southeastern United States, while muscadines (Muscadinia rotundifolia) provide exceptional disease resistance, heat tolerance, and environmental adaptability. Hybridizing these subgenera offers a path to combine fruit quality with disease resistance; however, wide Vitis × Muscadinia (V × M) crosses remain difficult due to differences in chromosome number, genetic divergence, and reproductive barriers that reduce fertility and recombination. Recent breeding efforts have introgressed stenospermocarpic …
Educational Freedom In The United States: Democracy, Pandemic Learning, And Family Choices, Daion Lamont Daniels
Educational Freedom In The United States: Democracy, Pandemic Learning, And Family Choices, Daion Lamont Daniels
Graduate Theses and Dissertations
This dissertation explores the relationships among educational freedom, democratic outcomes, and family choice in the United States. Through three complementary studies, it examines how school choice interacts with civic education, student achievement, and parental behavior. Together, these studies provide a comprehensive view of how educational freedom is reshaping American schooling. The first study investigates whether private schooling supports or undermines democratic values. Using survey data from students in both private and public schools, it finds that private school students demonstrate stronger knowledge of American government and greater support for democratic norms. These results suggest that private schools may play a …
Artificial Intelligence For Reliability: Predictive Health Maintenance And Geolocation In Gps-Denied Environments, Rafael Toche Pizano
Artificial Intelligence For Reliability: Predictive Health Maintenance And Geolocation In Gps-Denied Environments, Rafael Toche Pizano
Graduate Theses and Dissertations
In this dissertation, we explore the potential of machine learning and deep learning techniques to enhance the performance and robustness of applications across two major domains. By addressing the challenges within these fields, we demonstrate that we can leverage learning algorithms to obtain substantial improvements in accuracy and robustness. First, we tackle a problem in the field of predictive health maintenance. We propose a novel auto encoder and neural network based methodology to predict failure times in complex aviation systems to learn to distinguish between normal and abnormal operational behavior, and use this information to inform the neural network to …
Hyperspectral Indicators And Characterization Of Glyphosate-Induced Stress In Common Lambsquarters (Chenopodium Album L.), Mario Andrés Soto Valencia
Hyperspectral Indicators And Characterization Of Glyphosate-Induced Stress In Common Lambsquarters (Chenopodium Album L.), Mario Andrés Soto Valencia
Graduate Theses and Dissertations
Hyperspectral sensing enables detection of herbicide stress in weeds, but practical use requires strategies for redundancy control, rating variability management, and evaluator bias mitigation. This thesis evaluates common lambsquarters (Chenopodium album) under glyphosate exposure, aiming to identify key wavelengths, construct vegetation indices, and improve injury modeling. Greenhouse experiments used dimensionality reduction methods (principal component analysis, Relief F, Bayesian discriminant analysis) to isolate 34 unique wavelengths from about 3,200 bands. Calibration data were collected 14 days after treatment (DAT) to support wavelength selection and model development, while data from 27 DAT were used for independent validation. Class comparisons across six statistically …
Beam Steering Control For A Small-Scale 5g Antenna Array, Omar Wagih Elkalesh
Beam Steering Control For A Small-Scale 5g Antenna Array, Omar Wagih Elkalesh
Graduate Theses and Dissertations
This thesis demonstrates the design, development, and validation of a full-scale adaptive beam steering control system of a small-scale 5G antenna array, designed and thoroughly evaluated with MATLAB Simulink. Overcoming the significant challenge of establishing strong wireless links in dynamic environments, the new system uses a new closed-loop control framework that can automatically detect the signal sources and automatically change the beam direction in real-time. The use of the adaptation is necessary to combat tracking errors that are caused by the mobility of the mobile users, environmental variations, as well as channel estimation errors, widespread in future wireless communication systems. …
Transcriptomic And Contractile Adaptations In Skeletal Muscle In A Rodent Model Of Anorexia Nervosa, Oscar Armando Vicen
Transcriptomic And Contractile Adaptations In Skeletal Muscle In A Rodent Model Of Anorexia Nervosa, Oscar Armando Vicen
Graduate Theses and Dissertations
BACKGROUND: Anorexia Nervosa (AN) is a psychiatric disorder marked by severe chronic caloric restriction and is primarily diagnosed through psychological and behavioral symptoms. AN has the highest mortality of any psychiatric disorder with an increased risk of all-cause mortality. Many individuals with a history of AN experience incomplete recovery despite intervention treatment. Skeletal muscle molecular mechanisms under chronic energy deprivation remain poorly understood. PURPOSE: To investigate transcriptomic profiles of the gastrocnemius muscle following one month of a rodent model of AN. This study analyzed whether the molecular changes correlate with collected muscular force data to provide a comprehensive understanding of …
Privacy Protection In Cloud-Based Biometric Systems, Yatish Reddy Dubasi
Privacy Protection In Cloud-Based Biometric Systems, Yatish Reddy Dubasi
Graduate Theses and Dissertations
The widespread adoption of server-based biometric authentication systems, often hosted in the cloud, has introduced significant privacy risks. While these systems offer convenience, they require storing sensitive biometric templates on remote servers, creating a high-value target for adversaries. Unlike passwords, compromised biometric data is immutable and cannot be reissued, leading to an irreversible loss of privacy. This threat is exacerbated by template inversion attacks, which can reconstruct a user's original biometric trait (e.g., a face image) from its stored feature vector. This dissertation addresses these critical privacy challenges by designing, implementing, and evaluating a suite of novel frameworks for privacy-preserving …
Towards Vision-Brain Understanding At Scales: From Classical To Quantum Machine Learning Approaches, Xuan-Bac Nguyen
Towards Vision-Brain Understanding At Scales: From Classical To Quantum Machine Learning Approaches, Xuan-Bac Nguyen
Graduate Theses and Dissertations
In recent years, large-scale learning approaches such as unsupervised and self-supervised learning have revolutionized artificial intelligence. These methods enable machines to learn high-level representations without explicit human supervision, achieving remarkable success across vision, language, and multimodal tasks. However, such advances come at a cost—they rely on massive datasets, billions of parameters, and extensive computational resources. Despite these achievements, artificial systems still fall short of the remarkable learning efficiency of the human brain, which can infer, adapt, and generalize from limited experiences. This gap motivates a deeper exploration of how biological intelligence acquires knowledge and how these principles can inspire the …
Ecological Elemental Homeostasis And Stoichiometric Shifts: Biotic Responses To Ionic And Viral Stress, Samuel Anthony Tooru Dias
Ecological Elemental Homeostasis And Stoichiometric Shifts: Biotic Responses To Ionic And Viral Stress, Samuel Anthony Tooru Dias
Graduate Theses and Dissertations
Anthropogenic activities are reshaping the elemental composition of freshwater ecosystems, often creating stoichiometric imbalances that influence the growth, physiology and interactions of aquatic organisms. Ecological stoichiometric theory (EST) provides a framework for examining these changes by linking organismal elemental regulation to broader ecosystem processes. While traditionally focused on elements, such as carbon (C), nitrogen (N), and phosphorus (P), emerging stressors highlight the need to expand this framework to be more elementally inclusive for the examination of novel interactions. My dissertation integrates abiotic (salinization) and biotic stressors (viral infection) into an EST framework to evaluate how these factors alter elemental regulation …
Updating The Surface Geological Maps In The Boston Mountains Region Of Arkansas Using Subsurface Well Log Correlation And Lidar Mapping, Olivia Smith
Graduate Theses and Dissertations
The Pennsylvanian Atoka Formation are the primary surface outcrops of the Boston Mountains in northwest Arkansas. Where fully preserved in the Arkoma Basin to the south, the Atoka Formation exceeds 18,000 feet of sandstone and shale. It is mapped as a single “undifferentiated” unit on the surface geological map of Arkansas. This project correlates ten subsurface subdivisions of the Atoka Formation plus the Desmoinesian to the surface outcrops of the southern Boston Mountains. This produced a higher resolution surface map beyond the current Atoka Undifferentiated scheme. Recognition of the Atoka Formation subdivisions in surface outcrops using standard lithostratigraphic and biostratigraphic …
Contextual Embedding Using Machine Learning For Cybersecurity: Access Control And Application, Thanh Bui
Contextual Embedding Using Machine Learning For Cybersecurity: Access Control And Application, Thanh Bui
Graduate Theses and Dissertations
Access control is a well-established challenge in cybersecurity, with significant research focused on enhancing system autonomy and accuracy across various scenarios. Access control rules can be designed based on users’ roles, attributes, or relationships requesting access to specific resources. However, despite their benefits, these models still require human oversight. As systems expand and grow, it becomes increasingly complex for administrators to maintain precise access control rules, often necessitating extensive system updates or even a complete overhaul. This dissertation introduces a novel approach that leverages contextual embedding for user information to enable the system to autonomously authorize user requests for resources. …
Broiler Responsiveness To Dietary Amino Acid Density In A Commercial Setting, Virginia Slick
Broiler Responsiveness To Dietary Amino Acid Density In A Commercial Setting, Virginia Slick
Graduate Theses and Dissertations
The majority of research assessing the amino acid responsiveness in broilers has been conducted in experimental designs utilizing pens that contain 12 to 25 birds with high replication. While this trial design is beneficial as a way to perform high replications with multiple treatments in a way that is both economically and spatially feasible, it may not accurately translate to a rearing environment more similar to that of commercial open floor housing. This research was conducted to determine if the effects of lysine driven amino acid density diets that have been found in the traditional floor pen setting correlate to …
When The Grid Goes Dark: A Digital Forensics Study Of Industrial Control System Cyberattacks, Katie Kettler
When The Grid Goes Dark: A Digital Forensics Study Of Industrial Control System Cyberattacks, Katie Kettler
Graduate Theses and Dissertations
Industrial Control Systems (ICS) and Operational Technology (OT) maintain the grid, ensure water safety, and keep transportation running. Because they influence nearly every aspect of daily life, these systems have become prime targets for cyberattacks. The need for this research arises from the fact that when ICS and OT systems are compromised, the consequences go beyond data loss, and they can directly disrupt communities and endanger public safety. This thesis introduces digital forensics fundamentals and explains how investigations in ICS environments differ from those in traditional IT environments. This work then examines major attacks, including Stuxnet, the Ukrainian Grid Attacks …
Two Topics In Survival Analysis: Restricted Distance Covariance Test For Non-Proportional Hazard And A New Estimation For Dropout Rate, Ruizhe Yin
Graduate Theses and Dissertations
When treatment effects change over time, standard statistical methods, such as the log-rank test and the Cox proportional hazards model, may give misleading results. This dissertation presents the restricted distance covariance (rdcov) test, a nonparametric method that compares survival curves between groups within a chosen study period [0, τ] using right censored data. The statistic measures the dependence between pre-specified group labels and survival times using pairwise distances from Kaplan-Meier estimates. Our method does not rely on the proportional hazards assumption, and it equals zero only when survival functions are identical across groups. Thus, this test can be applied to …
Design Of Phase Shifter And True Time Delay Gan Mmics For High-Temperature Ku-Band Applications, Michael Lee Thompson
Design Of Phase Shifter And True Time Delay Gan Mmics For High-Temperature Ku-Band Applications, Michael Lee Thompson
Graduate Theses and Dissertations
This thesis presents the design, implementation, and high-temperature characterization of Gallium Nitride (GaN) monolithic microwave integrated circuits (MMICs) developed for beamforming and phased-array systems operating in the Ku-band (12-14 GHz). Two integrated circuits were designed: a 3-bit digital phase shifter and a 3-bit true time delay (TTD), both optimized for high linearity, low insertion loss, low phase error, and stable operation at elevated temperatures up to 300°C. Developing both a phase shifter and a TTD enabled a direct comparison of their beamforming performance and the evaluation of beam squint effects over frequency, a critical factor in wideband array design. The …
Fungicidal Management Of Spring Dead Spot Using Improved Modeling And Application Strategies, Michael Vincent Battaglia
Fungicidal Management Of Spring Dead Spot Using Improved Modeling And Application Strategies, Michael Vincent Battaglia
Graduate Theses and Dissertations
Spring dead spot (SDS) is a destructive disease of bermudagrass (Cynodon Rich. spp.) in parts of the world that experience winter dormancy. Fungicides are often necessary to properly manage SDS, and significant research has been conducted to improve fungicidal effectiveness. Several studies were conducted with the objectives of improving fungicide application timing, method of fungicide application, and long-term fungicidal efficiency. In the fungicide application study, a cooling degree-day (CDD) model based on soil temperatures was developed. The CDD model showed that isofetamid was highly effective against SDS during a wide application window in autumn, while tebuconazole was inconsistently effective and …
National Hero And Water Deity: The Worship Of Triệu Việt Vương In The Red River Delta, Vietnam, Huong Thi Nguyen
National Hero And Water Deity: The Worship Of Triệu Việt Vương In The Red River Delta, Vietnam, Huong Thi Nguyen
Graduate Theses and Dissertations
In my dissertation, the theory of collective memory will be deployed to address many questions regarding retaining, recovering, and re-creating the worship of King Triệu Việt Vương. He was a legendary, historical king of Vietnam who supposedly lived in the 6th century. His achievements were connected to the people living in the Red River Delta in their fight against the Liang invasion. The villagers who lived near or in this area also honored him for his spiritual power. They built a small temple/ shrine right by the riverbank to worship this King. The Vietnamese dynasties, Ly (in the 11th century), …
Refining The Geochronologic Framework Of The Early Cretaceous Nonmarine Western Interior Basin, Usa, Jack Fekete
Refining The Geochronologic Framework Of The Early Cretaceous Nonmarine Western Interior Basin, Usa, Jack Fekete
Graduate Theses and Dissertations
The Early to mid-Cretaceous marks a period of dynamic shifts in tectonism, depositional environments, climate, and biota across the mid-North American continent. However, despite their importance for understanding crucial biotic and geologic transitions during this period, nonmarine Early Cretaceous strata of the Western Interior Basin (WIB) remain poorly constrained geochronologically. Radiometric dating of syndepositional detrital minerals, such as ash-fall zircon, offers a solution to refining geochronologic frameworks. However, a magmatic lull in the Cordilleran magmatic arc during the Early Cretaceous limited the delivery of syndepositional zircon to the WIB, impeding such refinement. In this dissertation, I developed and tested new …
Media’S New-Age Opinion Leaders: Audience Perceptions Of Smi Credibility And Opinion Leadership Role, Alyssa Claire Riley
Media’S New-Age Opinion Leaders: Audience Perceptions Of Smi Credibility And Opinion Leadership Role, Alyssa Claire Riley
Graduate Theses and Dissertations
With worldwide technological and communication advancements in the last few decades, everyday citizens can capture, create, and share news through social media platforms. Nowadays, prominent social media influencers (SMIs) influence where and from whom online audiences consume their news and information. This study aims to explore how different SMI attributes – such as attractiveness, expertise, and trustworthiness – and their social media tactics create or add to audience perceptions of SMIs as credible online opinion leaders. Applying Two-Step Flow theory and Source Credibility theory, the study used data from a survey of 115 participants to understand how audiences perceived the …
Moral Worth And Motivational Demands, Spencer Heitman
Moral Worth And Motivational Demands, Spencer Heitman
Graduate Theses and Dissertations
It has become a philosophical commonplace to distinguish actions that are merely right from actions that possess moral worth. To be right, an action needs only to accord with the demands of morality. To possess moral worth, an action needs not only to be right, but to be non-accidentally so. While this much is uncontroversial, what is involved in this sense of non-accidentality is a matter of ongoing debate. This thesis lies at the heart of that debate. Many parties to this debate agree that actions with moral worth must be properly motivated. Suppose someone speaks respectfully to a colleague …
Sound Decisions: The Impact Of Music Genre In Fashion Advertising On Consumer Perceptions And Purchase Intention, Cassandra Thomas
Sound Decisions: The Impact Of Music Genre In Fashion Advertising On Consumer Perceptions And Purchase Intention, Cassandra Thomas
Graduate Theses and Dissertations
This study examines how music genre, brand type, and the perceived congruency between the two influences consumer perceptions of fashion advertising. Guided by Congruity Theory and Attitude Theory, this study employed a 3x3 experimental design in which 252 participants viewed one of nine advertisement conditions varying by music genre (pop, hip-hop, electronic) and brand type (activewear, fast fashion, luxury). A series of one-way ANOVAs, bivariate correlations, and regression analyses were conducted to interpret the effects of music genre, brand type, and perceived congruency on attitudes toward 1) the advertisement and brand, 2) credibility of the advertisement and brand, and 3) …
A Security Worth Having: The Pursuit Of Happiness Through Reading Burney, Radcliffe, And Austen, Samantha Meeks
A Security Worth Having: The Pursuit Of Happiness Through Reading Burney, Radcliffe, And Austen, Samantha Meeks
Graduate Theses and Dissertations
This dissertation explores the works of three female authors of female protagonists in the long 18th century: Frances Burney’s Camilla and Evelina; Anne Radcliffe’s The Mysteries of Udolpho and The Italian; and Jane Austen’s Northanger Abbey, Sense and Sensibility, and Pride and Prejudice. By following the paths to security the female protagonists of these novels fashion, and identifying the elements of Stoicism and related Hellenism and the aspects of cybernetics, this dissertation delves into the choices female protagonists make along the way regarding their security and how such choices lead to agency and self-fashioning for these women. Emotional, economic, and …
Estimating Drivers Of Certified Seed Adoption Among Colombian Rice Producers And Assessing Yield Impacts At The Plot Level, Jenika Hazelbaker
Estimating Drivers Of Certified Seed Adoption Among Colombian Rice Producers And Assessing Yield Impacts At The Plot Level, Jenika Hazelbaker
Graduate Theses and Dissertations
As the population rises, there is a growing need to increase agricultural productivity to keep up with food demands. However, agricultural land expansion to increase production is not a sustainable solution long-term. The Global South particularly faces greater needs for rice as a staple food, yet countries in Latin America like Colombia have faced declining rice yields. Technologies that boost agricultural productivity using existing land, such as certified seeds, are considered a tool to address this problem in the face of land scarcity and climate change. Certified seeds have high genetic purity and are free from disease. Despite the quality …
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 …
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 …