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Impact On Infinite Asteroids: Analysis Of Ejecta Outcomes In Small Body Binary Systems, Jennifer Larson Jan 2023

Impact On Infinite Asteroids: Analysis Of Ejecta Outcomes In Small Body Binary Systems, Jennifer Larson

Electronic Theses and Dissertations, 2020-2023

Binary asteroid systems make up roughly 15% of objects occupying near-Earth space, the Main Belt, and trans-Neptunian space. The impact history of asteroids in binary systems represents an interesting aspect of the general problem pertaining to the nature and evolution of surfaces for such objects. Specifically, the post-impact dynamics of ejecta and its relation to surface modification is a challenging question owing, in part, to the unusual gravitational field in a binary system and the subsequent capture and emplacement of debris on either binary component. Observable differences or similarities between the two bodies in the color, reflectance, thermal properties, and …

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Exploring Risk Factors Associated With Post-Traumatic Stress Disorder Symptomatology In Police, Lori Camacho Jan 2023

Exploring Risk Factors Associated With Post-Traumatic Stress Disorder Symptomatology In Police, Lori Camacho

Electronic Theses and Dissertations, 2020-2023

Mental health outcomes, especially post-traumatic stress disorder (PTSD), in police have become more of a concern for law enforcement administrators, peers, family and friends. Using culture as a theoretical framework, the current cross-sectional, convergent mixed methods study explored the relationship between personal cumulative exposure to different types of critical incidents and likelihood of reporting PTSD symptoms in a sample of officers (n=71) from one municipal police department. This study also examined how personal cumulative exposure to different types of critical incidents and likelihood of reporting symptoms of PTSD may be moderated by the degree of perception of social support from …

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It's In The Design: Student Perceptions Of Intercultural Interactions In Online Communication Classrooms, Darius Lana Jan 2023

It's In The Design: Student Perceptions Of Intercultural Interactions In Online Communication Classrooms, Darius Lana

Electronic Theses and Dissertations, 2020-2023

This study identifies how intercultural interaction takes place in online communication courses within higher education. Radically politicized efforts to remove discussion around identity and difference from education and increased enrollment in online courses has raised a concern regarding the degree to which diversity, equity, and inclusion goals are being met in college classrooms generally and online sections specifically. This study identified how current pedagogical content, structure, and delivery of online communication courses may impact intercultural interaction and interaction. Findings indicate a need to address the design of online communication courses to better meet the desired intercultural interaction of the students …

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Reflective Planar Optics With Cholesteric Liquid Crystal For Near-Eye Displays, Yannanqi Li Jan 2023

Reflective Planar Optics With Cholesteric Liquid Crystal For Near-Eye Displays, Yannanqi Li

Electronic Theses and Dissertations, 2020-2023

Display market has undergone dramatic changes as the near eye displays (NED) are gaining increasing attention because they offer a deeper level of human-computer interaction with the advancement of electronic devices and computer sciences. The NEDs can be presented in two ways: virtual reality (VR) and augmented reality (AR). The former is completely immersive while the latter combines the digital information with the surrounding scenes. Although several VR headsets have been commercialized for consumers and AR products for prosumers because of their high cost, but there is still a long way to go to satisfy the strict requirements of human …

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It Is Time To Change The Way We Change, Thane Keller Jan 2023

It Is Time To Change The Way We Change, Thane Keller

Electronic Theses and Dissertations, 2020-2023

Seventy percent of organizational change initiatives fail. Among organizations where change and adaptation are necessary for survival, the U.S. military stands at the top. The disparity between desired health and fitness behaviors and actual behaviors is a glaring reminder that change is difficult to implement and that current change systems struggle. Merit-based systems offer a solution by rewarding and reinforcing good behavior to generate lasting change. This paper evaluates Kotter's Change Model and Nudge Theory and found them insufficient because they do not sufficiently address reinforcement learning or the temporal tie between behaviors and rewards for reinforcement. This paper then …

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Capturing And Scaffolding The Complexities Of Self-Regulation During Game-Based Learning, Daryn Dever Jan 2023

Capturing And Scaffolding The Complexities Of Self-Regulation During Game-Based Learning, Daryn Dever

Electronic Theses and Dissertations, 2020-2023

Game-based learning environments (GBLEs) can offer students with engaging interactive instructional materials while also providing a research platform to investigate the dynamics and intricacies of effective self-regulated learning (SRL). Past research has indicated learners are often unable to monitor and regulate their cognitive and metacognitive processes within GBLEs accurately and effectively on their own due mostly to the open-ended nature of these environments. The future design and development of GBLEs and embedded scaffolds, therefore, require a better understanding of the discrepancies between the affordances of GBLEs and the required use of SRL. Specifically, how to incorporate interdisciplinary theories and concepts …

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Sexual Violence In Armed Conflict: How Levels Of Sexual Violence In Peacetime Affect Levels Of Sexual Violence In Conflict, Sydney Snowden Jan 2023

Sexual Violence In Armed Conflict: How Levels Of Sexual Violence In Peacetime Affect Levels Of Sexual Violence In Conflict, Sydney Snowden

Electronic Theses and Dissertations, 2020-2023

Why do some armed conflicts have higher levels of sexual violence than others? Some existing theoretical work has pointed toward the possibility that the presence of sexual violence before armed conflict occurs can impact the levels of sexual violence during armed conflict, however, little empirical work has examined these theories. This thesis uses new, unique data to address concerns about the validity of previous studies and to explore sexual violence over the boundaries of time, looking at pre-conflict levels of sexual violence in addition to levels of sexual violence during armed conflicts. Using a parallel mixed methods research design, this …

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Predicting Implementation Citizenship Behavior Rating Discrepancies Between Supervisor-Subordinate Dyads, Alexandra Kandah Jan 2023

Predicting Implementation Citizenship Behavior Rating Discrepancies Between Supervisor-Subordinate Dyads, Alexandra Kandah

Electronic Theses and Dissertations, 2020-2023

Organizational citizenship behavior (OCB), defined as behavior that is discretionary and not directly or explicitly recognized by the formal reward system, has gained significant interest in the literature over the past few decades. Recent OCB research has begun to address more specialized facets of citizenship behavior that target behaviors that support specific strategic goals in the organization. One form of OCB encompasses those behaviors that assist with the implementation of new practices or innovations in the organization, above and beyond typical implementation. This study extends both the general OCB literature and the newer literature on implementation citizenship by examining factors …

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Using Gis To Better Understand The Cracker Community Of Pat's Island In The Ocala National Forest, Florida, Nicholas Kopp Jan 2023

Using Gis To Better Understand The Cracker Community Of Pat's Island In The Ocala National Forest, Florida, Nicholas Kopp

Electronic Theses and Dissertations, 2020-2023

This research uses GIS methods to contextualize a Florida Cracker community in the Ocala National Forest. My case study is drawn from two seasons of fieldwork and supporting desktop surveys associated with Pat's Island, the home of multiple Cracker families. Cracker culture is historically categorized by its efforts to avoid modernization and prevent the commercialization of traditional lifeways in the quickly shifting society of late-19th and early 20th-century Florida. The geospatial expressions of these Cracker values are an emphasis on semi-remote living, adaptations to a unique environmental context, and the development of a semi-self-sufficient community. This research evaluates how GIS …

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Clustering Of Diverse Multiplex Networks, Yaxuan Wang Jan 2023

Clustering Of Diverse Multiplex Networks, Yaxuan Wang

Electronic Theses and Dissertations, 2020-2023

This dissertation introduces the DIverse MultiPLEx Generalized Dot Product Graph (DIMPLE-GDPG) network model where all layers of the network have the same collection of nodes and follow the Generalized Dot Product Graph (GDPG) model. In addition, all layers can be partitioned into groups such that the layers in the same group are embedded in the same ambient subspace but otherwise all matrices of connection probabilities can be different. In common particular cases, where layers of the network follow the Stochastic Block Model (SBM) and Degree Corrected Block Model (DCBM), this setting implies that the groups of layers have common community …

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Investigation Of Endothelial Mechanics On Primary Cell Functions: Endothelium Permeability And Wound Healing, Sean Beverung Jan 2023

Investigation Of Endothelial Mechanics On Primary Cell Functions: Endothelium Permeability And Wound Healing, Sean Beverung

Electronic Theses and Dissertations, 2020-2023

The endothelium composes the inner lining of blood vessels, the heart, and lymphatic vessels. Within the cardiovascular system, it is an extremely important structure, aiding in the regulation of blood pressure with the vascular tone, recruiting immune response, regulating the transfer of material in and out of the bloodstream, and the creation of new blood vessels through angiogenesis. The endothelium is composed entirely of endothelial cells. These cells lay in a flat squamous formation and are in direct contact with blood and aid in the regulation and transfer of material in and out of the bloodstream via active and passive …

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Inkling: An Exploration Of Visual Effects As A Character, Joshua Cooper Jan 2023

Inkling: An Exploration Of Visual Effects As A Character, Joshua Cooper

Electronic Theses and Dissertations, 2020-2023

Inkling is an animated short film about a creature made of ink falling into a cycle of anxiety. This film explores the use of visual effects in character design. Inspiration for this film was drawn from Absurdist essays and stories and used abstract imagery and cinematic devices to manipulate the audience into feeling the character's anxiety. This thesis briefly examines the foundation of methods pioneered by visual effect artists. To produce this short film, critical decisions in software and animation were made to streamline the process to allow more time to focus on creating a method for the visual effect …

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Nanostructured Alloy Thin Film Fabrication And Application For Zinc-Air Battery And Lithium-Ion Battery, Guanzhi Wang Jan 2023

Nanostructured Alloy Thin Film Fabrication And Application For Zinc-Air Battery And Lithium-Ion Battery, Guanzhi Wang

Electronic Theses and Dissertations, 2020-2023

The depletion of unsustainable fossil fuels and growing environmental issues have given rise to scientific challenges and research interests in the development of renewable energy technologies to meet the rising global energy demand. Electrochemical energy storage and conversion technologies (ESCTs), such as lithium-ion batteries, metal-air batteries, supercapacitors, and fuel cells, etc., offer a clean and sustainable strategy for utilizing energy. As the core components, the electrode materials, including anodes, cathodes, and catalysts, play a direct decisive role in the device's performance in practical application. Therefore, the development of high-performance and low-cost electrode materials is critical for the success of these …

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Electroanalytical Investigations Of Microrna-Conjugated Cerium Oxide Based Nanomaterials For Biomedical Applications, Chaimae El Ghzaoui Jan 2023

Electroanalytical Investigations Of Microrna-Conjugated Cerium Oxide Based Nanomaterials For Biomedical Applications, Chaimae El Ghzaoui

Electronic Theses and Dissertations, 2020-2023

Diabetes patients are increasingly suffering from wound-healing impairments coupled with other severe medical conditions. High levels of oxidative stress and proinflammatory cytokines are predominant pathologic characteristics of diabetic wounds. Applying microRNA (miRNA) in gene therapy often successfully treats various disorders by generating highly specific bio-responses. Studies revealed that microRNA146a (miR146a), a regulator of inflammation, is downregulated in diabetic wounds. However, miR203 is found to be highly-expressed in diabetic foot ulcers in positive correlation with disease severity. We have synthesized Cerium oxide nanoparticles (CNPs) since they are used in various biomedical applications due to their high enzyme-mimetic activities and reactive oxygen …

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Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo Jan 2023

Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo

Electronic Theses and Dissertations, 2020-2023

The study of biodiversity is a fundamental part of the study of the ecosystem's function and stability and how changes in the habitat shape the interaction between species. In recent years, the classification of species benefited from the analysis of several types of data to aid the distinction of morphologically similar species. Enyaliopsis iaculator (Naskrecki and Guta, 2019) is a species endemic to central Mozambique. Different populations of E. iaculator were reported to exhibit differences in the time of the day the mating call is displayed, but no morphological differences were reported. Since call behavior tends to be species specific …

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Learning To Think Like A Leader, Mark Hickson Iii Jan 2023

Learning To Think Like A Leader, Mark Hickson Iii

Journal of the Association for Communication Administration

This is the second in a three-part series that the author has been working on. The first part was included in an earlier issue of this journal.

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The Impact Of Student Motivation, Preparation, And Learned Helplessness On Undergraduate Students’ Communication With Advisors, Heather Carmack Jan 2023

The Impact Of Student Motivation, Preparation, And Learned Helplessness On Undergraduate Students’ Communication With Advisors, Heather Carmack

Journal of the Association for Communication Administration

The purpose of this exploratory study was to examine communication factors that influence students’ academic advising appointments, including predictors of scheduling future advising appointments. Undergraduate students’ motivation and feelings of learned helplessness were related to their advising meeting preparation and their communication involvement during advising meetings. Students who reported high levels of motivation and low levels of learned helplessness were more likely to prepare for advising meetings and be communicative during meetings. Students with immediate advisors were more likely to communicate with their advisors during meetings. Advising meeting preparation, motivation, and learned helplessness were significant factors in future advising appointments.

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Rotorcraft Lander Fixed To A Descending Capsule Backshell, Corey Zucker Jan 2023

Rotorcraft Lander Fixed To A Descending Capsule Backshell, Corey Zucker

Electronic Theses and Dissertations, 2020-2023

NASA is financing a mission to study the surface of Titan, Saturn's largest moon, to investigate the terrain, chemical compositions, and potential for existent life. This mission is an exciting advancement from Mars Ingenuity, because the quadrotor lander, Dragonfly, will be the first of its kind with four coaxial rotors. Upon entry into Titan, and at near surface atmospheric conditions, Dragonfly will exit a parachute supported backshell that has shed its protective heatshield. The aerodynamics of this state are significant in comprehending the dynamics of the overall system for successful deployment into powered flight. The studies presented here examine the …

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Anatomically-Guided Deep Learning For Left Ventricle Geometry Reconstruction And Cardiac Indices Analysis Using Mr Images, Andre Von Zuben Jan 2023

Anatomically-Guided Deep Learning For Left Ventricle Geometry Reconstruction And Cardiac Indices Analysis Using Mr Images, Andre Von Zuben

Graduate Thesis and Dissertation 2023-2024

Recent advances in deep learning have greatly improved the ability to generate analysis models from medical images. In particular, great attention is focused on quickly generating models of the left ventricle from cardiac magnetic resonance imaging (cMRI) to improve the diagnosis and prognosis of millions of patients. However, even state-of-the-art frameworks present challenges, such as discontinuities of the cardiac tissue and excessive jaggedness along the myocardial walls. These geometrical features are often anatomically incorrect and may lead to unrealistic results once the geometrical models are employed in computational analyses. In this research, we propose an end-to-end pipeline for a subject-specific …

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Investigating Shallow Neural Networks For Orbit Propagation Deployed On Spaceflight-Like Hardware, Hunter Quebedeaux Jan 2023

Investigating Shallow Neural Networks For Orbit Propagation Deployed On Spaceflight-Like Hardware, Hunter Quebedeaux

Graduate Thesis and Dissertation 2023-2024

Orbit propagation is the backbone of many problems in the space domain, such as uncertainty quantification, trajectory optimization, and guidance, navigation, and control of on orbit vehicles. Many of these techniques can rely on millions of orbit propagations, slowing computation, especially evident on low-powered satellite hardware. Past research has relied on the use of lookup tables or data streaming to enable on orbit solutions. These solutions prove inaccurate or ineffective when communication is interrupted. In this work, we introduce the use of physics-informed neural networks (PINNs) for orbit propagation to achieve fast and accurate on-board solutions, accelerated by GPU hardware …

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A Novel Multi-Observer Orbit Determination And Estimation Framework For Cislunar Space Domain Awareness, James E. Hippelheuser Jr. Jan 2023

A Novel Multi-Observer Orbit Determination And Estimation Framework For Cislunar Space Domain Awareness, James E. Hippelheuser Jr.

Graduate Thesis and Dissertation 2023-2024

This work presents a measurement model designed for multiple observers (space-based and/or ground-based) for cislunar orbit determination and estimation for space domain awareness (SDA). The measurement model is able to rely solely on angles-only measurements by defining the line between the observer and the target object as the intersection of two non-parallel planes. There are two primary applications for the measurement model related to cislunar SDA: (1) It provides a new initial orbit determination (IOD) technique that does not require any knowledge of the dynamical environment, and (2) It is adopted into a sequential estimation scheme to provide continuous orbit …

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Modeling And Experimental Validation Of Mission-Specific Prognosis Of Li-Ion Batteries With Hybrid Physics-Informed Neural Networks, Kajetan Fricke Jan 2023

Modeling And Experimental Validation Of Mission-Specific Prognosis Of Li-Ion Batteries With Hybrid Physics-Informed Neural Networks, Kajetan Fricke

Graduate Thesis and Dissertation 2023-2024

While the second part of the 20th century was dominated by combustion engine powered vehicles, climate change and limited oil resources has been forcing car manufacturers and other companies in the mobility sector to switch to renewable energy sources. Electric engines supplied by Li-ion battery cells are on the forefront of this revolution in the mobility sector. A challenging but very important task hereby is the precise forecasting of the degradation of battery state-of-health and state-of-charge. Hence, there is a high demand in models that can predict the SOH and SOC and consider the specifics of a certain kind of …

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Artificial Intelligence And Ethics, Carol M. Bast Jan 2023

Artificial Intelligence And Ethics, Carol M. Bast

Faculty Scholarship and Creative Works

This paper focuses on the impact that artificial intelligence has had on the practice of law and ethics rules. In some respects, the ethics rules, comments, and continuing legal education requirements incorporate knowledge of technology into the duty of attorney competence. After offering a primer on artificial intelligence and attorney ethics, the paper discusses certain proposals for revising the ethics rules, comments, and continuing legal education requirements.

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Ocean Vector Wind Measurement Potential From The Global Precipitation Measurement Mission Using A Combined Active And Passive Algorithm, Alamgir Hossan Jan 2023

Ocean Vector Wind Measurement Potential From The Global Precipitation Measurement Mission Using A Combined Active And Passive Algorithm, Alamgir Hossan

Electronic Theses and Dissertations, 2020-2023

Ocean surface vector wind (OVW) is an essential parameter for understanding the physics and dynamics of the ocean-atmosphere system, thereby improving weather forecasting and climate studies. Satellite scatterometers, synthetic aperture radars, and polarimetric microwave radiometers have provided almost global coverage of ocean surface vector wind for the last four decades. Nonetheless, a consistent and uninterrupted long-time data record with the capability of resolving sub-diurnal variability has remained a critical challenge over the years. The Global Precipitation Measurement Mission (GPM) is a satellite mission designed to provide space-based precipitation information on a global scale with complete diurnal sampling. This dissertation presents …

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Using An Interactional Ethnographic Perspective To Explore Insider Perspectives When Working With Previously Archived Records, Michelle Sullivan Jan 2023

Using An Interactional Ethnographic Perspective To Explore Insider Perspectives When Working With Previously Archived Records, Michelle Sullivan

Electronic Theses and Dissertations, 2020-2023

Studies in social science fields have examined specific issues in (re)using archived records for qualitative research, though few have focused on the use of private archives in ethnographic research, especially when it comes to foregrounding participant perspectives. In this methodological dissertation I draw on two sets of archived records to demonstrate how an ethnographer can make visible insider knowledge and perspectives when conducting qualitative research with archived records. Utilizing an interactional ethnographic perspective, I construct a dataset for analysis, making my logic visible as I use mapping and transcription, domain and taxonomic analysis, and discourse analysis to foreground insider perspectives …

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Predicting Heart Disease Using Tree-Based Model, Emil Agbemade Jan 2023

Predicting Heart Disease Using Tree-Based Model, Emil Agbemade

Data Science and Data Mining

The paper presents a study on the use of machine learning algorithms for the prediction of heart disease, which is the leading cause of death worldwide. The study focuses on the use of decision tree algorithms, which have the advantage of considering a large number of risk factors. The heart disease data set was obtained from the UCI Machine Learning Repository and was analyzed using a decision tree classifier. The data set had 6 missing data points, which were deleted, leaving 279 instances for analysis. One-hot-encoding was performed on categorical variables with more than two responses. The decision tree classifier …

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Silent Agony: Automated Detection Of Ethnic And Religious Cyberbullying Using Machine Learning, Emil Agbemade Jan 2023

Silent Agony: Automated Detection Of Ethnic And Religious Cyberbullying Using Machine Learning, Emil Agbemade

Data Science and Data Mining

The use of electronic mobile devices, social media, and networking websites has increased tremendously in recent years. Despite the advantages of these systems, such as exchanging ideas and information, being sociable, and providing entertainment, users may encounter adverse behaviors like toxicity, bullying, extremism, and cruelty. The prevalence of such behaviors has grown significantly in cyberspace, posing a threat to individuals and communities. To address this issue, there is a high demand for automated cyberbullying detection systems. Machine learning algorithms have been widely used to build such systems by classifying and detecting cyberbullying. In this study, we employed popular machine learning …

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Homogeneity Test On Error Rates From Ordinal Scores And Application To Forensic Science, Ngoc Ty Nguyen Jan 2023

Homogeneity Test On Error Rates From Ordinal Scores And Application To Forensic Science, Ngoc Ty Nguyen

Graduate Thesis and Dissertation 2023-2024

The Receiver Operating Characteristic (ROC) curve is used to measure the classification accuracy of tests that yield ordinal or continuous scores. Ordinal scores are common in medical imaging studies and, more recently, in black-box studies on forensic identification accuracy (Phillips et al., 2018). To assess the accuracy of radiologists in medical imaging studies or the accuracy of forensic examiners in biometric studies, one needs to estimate the ROC curves from the ordinal scores and account for the covariates related to the radiologists or forensic examiners. In this thesis, we propose a homogeneity test to compare the performance of raters. We …

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The Relative Contribution Of Health-Care Points Of Service To Overall Patient Satisfaction At A University Health Center, Jay M. Parikh Jan 2023

The Relative Contribution Of Health-Care Points Of Service To Overall Patient Satisfaction At A University Health Center, Jay M. Parikh

Honors Undergraduate Theses

Throughout the process of receiving healthcare, a patient is affected by several factors and processes. To just name a few, how long a patient must wait at the clinic, how friendly the front desk is, how the nurse treats the patient, how effective the physician is with his or her communication, what the cost of a patient's healthcare is, and how clean the clinic is all affect the patient's experience. When clinics excel in these factors, it promotes a favorable relationship between the patient and the clinic. Patients trust the healthcare provider and desire to continue attending that clinic when …

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Observing The Relationship Between Physical Activity, Overall Health, Anxiety, And Sleep, Brianna Chicas Jan 2023

Observing The Relationship Between Physical Activity, Overall Health, Anxiety, And Sleep, Brianna Chicas

Honors Undergraduate Theses

College students' mental health has been researched for some time. In particular, the correlation between physical activity and mental health symptoms has been researched. The study examines the relationship between physical activity and anxiety, sleep, and overall health. College undergraduate students at the University of Central Florida took an online survey that measured all of these variables. A Pearson's correlation coefficient was used to assess correlations. Positive correlations were found between anxiety and sleep, anxiety and social desirability, sleep and social desirability, and strength training and vigorous physical activity. Negative correlations were found between overall health and physical activity, overall …

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