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"Reeling In" Juvenile Sportfish Through Coastal Habitat Restoration: Population, Community, And Trophic Responses In The Indian River Lagoon, Florida, Jennifer Loch Jan 2022

"Reeling In" Juvenile Sportfish Through Coastal Habitat Restoration: Population, Community, And Trophic Responses In The Indian River Lagoon, Florida, Jennifer Loch

Electronic Theses and Dissertations, 2020-2023

Coastal habitats provide crucial nursery habitat for predatory fishes, but they are in decline worldwide, impacting economically important fisheries. Habitat restoration can simultaneously mitigate the effects of habitat loss and benefit predators (e.g., sportfish), although this relationship is understudied. Here, the response of juvenile sportfish to oyster reef and living shoreline restoration is compared to controls in the Indian River Lagoon, Florida prior to and following restoration for up to three years through examination of community (diversity, assemblage), population (abundance), biometric (size, body condition), ontogenetic, and trophic (gut contents, stable isotopes) dynamics. Stable isotopes were used to quantify dietary history, …

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D&D&U&G: Uses And Gratifications Theory And Dungeons & Dragons, Ariana Ferrante Jan 2022

D&D&U&G: Uses And Gratifications Theory And Dungeons & Dragons, Ariana Ferrante

Electronic Theses and Dissertations, 2020-2023

Given the growing popularity of the tabletop role-playing game Dungeons & Dragons, or D&D, this thesis study applied the Uses and Gratifications theory to determine what players of the game get from engagement with this particular, previously overlooked form of entertainment media. Additionally, this research sought to determine whether these discovered gratifications overlapped at all with perceived similar media, specifically massive multiplayer online roleplaying games, MMORPGs, and social media. A series of in-depth, semi-structured interviews designed to elicit relevant responses were conducted with 14 respondents, followed by a thematic analysis to determine gratifications. The qualitative analysis determined a set of …

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Detecting And Tracking Vulnerable Road Users' Trajectories Using Different Types Of Sensors Fusion, Zhongchuan Wang Jan 2022

Detecting And Tracking Vulnerable Road Users' Trajectories Using Different Types Of Sensors Fusion, Zhongchuan Wang

Electronic Theses and Dissertations, 2020-2023

Vulnerable road user (VRU) detection and tracking has been a key challenge in transportation research. Different types of sensors such as the camera, LiDAR, and inertial measurement units (IMUs) have been used for this purpose. For detection and tracking with the camera, it is necessary to perform calibration to obtain correct GPS trajectories. This method is often tedious and necessitates accurate ground truth data. Moreover, if the camera performs any pan-tilt-zoom function, it is usually necessary to recalibrate the camera. In this thesis, we propose camera calibration using an auxiliary sensor: ultra-wideband (UWB). USBs are capable of tracking a road …

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Extreme-Pressure Ignition Studies Of Methane And Natural Gas With Co2 With Applications In Rockets And Gas Turbines, Cory Kinney Jan 2022

Extreme-Pressure Ignition Studies Of Methane And Natural Gas With Co2 With Applications In Rockets And Gas Turbines, Cory Kinney

Electronic Theses and Dissertations, 2020-2023

Although concerns about carbon dioxide (CO2) emissions and their impact on climate change has led to an increase in renewable energy electricity generation, natural gas power plants remain the dominant source of electricity generation in the United States. Until the capacity of renewable energy sources can meet growing electricity demand, natural gas power generation will likely remain an important source of electricity generation. Supercritical CO2 (sCO2) power generation cycles offer an alternative to traditional gas turbines by reusing and sequestering CO2 from the combustion process to prevent its release into the atmosphere. This study seeks to understand natural gas ignition …

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Impacts Of Covid-19 On Health Promotion Within Higher Education: Exploring Organizational Resilience, Maureen Hawkins Jan 2022

Impacts Of Covid-19 On Health Promotion Within Higher Education: Exploring Organizational Resilience, Maureen Hawkins

Electronic Theses and Dissertations, 2020-2023

The close proximity of students learning, living, socializing and working on university and college campuses presents a unique setting to understand organization responses to the COVID-19 pandemic. This concurrent, mixed methods qualitative study explored how one institution of higher education demonstrated resilience and how its health promotion activities pivoted and adjusted to reduce virus transmission and maintain safety while continuing to promote learning and education. Based on the organizational resilience conceptualization developed by Duchek (2020), data collection methods combined individual interviews with university leaders, self-interview and reflection, and a review of organization documents a connection between health promotion, organization resilience, …

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No More Pencils, No More Books: A One-To-One Digital Device Implementation And Its Effect On The Digital Divide, Theresa Gindlesperger Jan 2022

No More Pencils, No More Books: A One-To-One Digital Device Implementation And Its Effect On The Digital Divide, Theresa Gindlesperger

Electronic Theses and Dissertations, 2020-2023

Digital divide scholars suggest that the speed and scope of the digital precipitates unique catalysts of societal inequity, which public schools have long sought to mitigate by democratizing access to education. This study investigates a one-to-one digital device program in one of the largest public school districts in the United States, and its impact on literacy achievement in varying socioeconomic climates and the attitudes and beliefs of marginalized parent populations. Previous studies on one-to-one programs are largely qualitative, and existing quantitative studies suffer too many variables for reliable conclusions. Through a mixed methods design, this study centers on a highly-standardized …

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Studies On Copper Indium Based Oxide Transparent Semiconducting Thin Films., Giji Skaria Jan 2022

Studies On Copper Indium Based Oxide Transparent Semiconducting Thin Films., Giji Skaria

Electronic Theses and Dissertations, 2020-2023

Transparent Conducting Oxides (TCOs) have unique optoelectronic properties which allow visible light to pass through while having reasonably high electrical conductivity. TCOs find a variety of applications ranging from uses in solar cells, optical displays, reflective coatings, light emission devices, low-emissivity windows, electrochromic mirrors, UV sensors, and windows, defrosting windows, electromagnetic shielding, and transparent electronics. The conductivity of TCOs can be tuned from insulating via semiconducting to conducting as well as their transparency adjusted depending on the donor/acceptor levels as well as the bandgap of the material. This enables the realization of both n-type and p-type TCOs which make them …

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Big Data Processing Attribute Based Access Control Security, Anne Tall Jan 2022

Big Data Processing Attribute Based Access Control Security, Anne Tall

Electronic Theses and Dissertations, 2020-2023

The purpose of this research is to analyze the security of next-generation big data processing (BDP) and examine the feasibility of applying advanced security features to meet the needs of modern multi-tenant, multi-level data analysis. The research methodology was to survey of the status of security mechanisms in BDP systems and identify areas that require further improvement. Access control (AC) security services were identified as priority area, specifically Attribute Based Access Control (ABAC). The exemplar BDP system analyzed is the Apache Hadoop ecosystem. We created data generation software, analysis programs, and posted the detailed the experiment configuration on GitHub. Overall, …

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Electronic And Optoelectronic Properties Of Two-Dimensional Heterostructures For Next-Generation Device Technologies, Jesse Thompson Jan 2022

Electronic And Optoelectronic Properties Of Two-Dimensional Heterostructures For Next-Generation Device Technologies, Jesse Thompson

Electronic Theses and Dissertations, 2020-2023

Since monolayer graphene was isolated in 2004, there has been significant interest in integrating layered materials into innovative device designs and hybrid materials to help solve pressing technological challenges. This is partially because they can typically be thinned to a two-dimensional (2D) form without suffering from roughness-induced scattering and can exhibit thickness-dependent variations in properties such as their energy band gap. This dissertation reports on investigations of electronic and optoelectronic device physics in 2D material heterostructures. The investigation of electronic device physics focuses on the interface between 2D molybdenum disulfide (MoS2) and gold (Au), which behaves as a resistive switching …

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Associations Between Patient-Provider Trust And Hiv Care Continuum Outcomes, James Caldwell Jan 2022

Associations Between Patient-Provider Trust And Hiv Care Continuum Outcomes, James Caldwell

Electronic Theses and Dissertations, 2020-2023

The current research examines trust as a component of the Healthcare Relationship Scale (HCR) using data from the Medical Monitoring Project (MMP), a program designed by the Centers for Disease Control and Prevention (CDC). This dataset focuses on the experiences and needs of people living with HIV (PLWH). We examined how relationships between people living with HIV and their HIV providers may be associated with two distinct variable groups: (1) socio-demographic characteristics, such as age, gender, race, education and poverty status; and (2) patient health as it relates to the continuum of care, such as patient-rated general health, adherence to …

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A Phenomenological Study Of The Stem Identity Experiences Of Women Stem Faculty Who Obtain Federal Grants, Nicole Whetstine Jan 2022

A Phenomenological Study Of The Stem Identity Experiences Of Women Stem Faculty Who Obtain Federal Grants, Nicole Whetstine

Electronic Theses and Dissertations, 2020-2023

The purpose of this qualitative phenomenological study was to explore how STEM identity development influences the experiences of women STEM faculty who obtained federal grant funding. Data was collected from semi-structured interviews conducted with ten full-time women faculty in STEM employed at U.S. postsecondary institutions who were or were previously lead investigator on a federal grant. Herlihy and Campbell's (2018) socio-cultural-STEM identity theoretical framework informed the data analysis. Findings from the study revealed four primary ways in which participants were positively influenced in STEM including: (a) having supportive interactions with others; (b) being encouraged by others; (c) finding connections with …

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Machine Learning In Fiber Optics, Xiaowen Hu Jan 2022

Machine Learning In Fiber Optics, Xiaowen Hu

Electronic Theses and Dissertations, 2020-2023

Recent burgeoning machine learning has revolutionized our ways of looking at the world. Being extraordinarily good at pattern recognition, machine learning has been widely applied to many fields to solve challenging problems. This dissertation demonstrates the applications of machine learning on scanning-free fiber-optic imaging systems (FOISs), and on the design of anti-resonant fibers. In the first part, we propose a semi-supervised learning framework called the adaptive inverse mapping (AIP) to stabilize the imaging performance through multimode fibers (MMFs). We show that if the state of the MMF is traced closely, the output images can be used as probes to correct …

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A Causal Comparative Study Of Principal Perceptions Of Instructional Leadership Practices In One Central Florida School District, Tracy Shenuski Jan 2022

A Causal Comparative Study Of Principal Perceptions Of Instructional Leadership Practices In One Central Florida School District, Tracy Shenuski

Electronic Theses and Dissertations, 2020-2023

The purpose of this causal comparative quantitative study was to examine relationships between types of crises, perceptions of instructional leadership practices, and length of service as principal. Data from a purposive sampling using the Instructional Leadership, Job Satisfaction, and Retention Survey (ILJSRS) were collected from principals in one district and analyzed to assess the impact crises played on their perceptions of instructional leadership practices and their retention. Independent variables included demographics, type of crisis (weather, violence, health), and principal retention. The dependent variable was perception scores on the ILJSRS. Statistical analyses included the General Linear Model with Robust Standard Errors …

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Teachers' Perceptions Of The Reading Components Of The English Language Arts Florida Standards Assessment In Grades 3 To 8, Lorna Kesner Jan 2022

Teachers' Perceptions Of The Reading Components Of The English Language Arts Florida Standards Assessment In Grades 3 To 8, Lorna Kesner

Electronic Theses and Dissertations, 2020-2023

This study investigated teachers' perspectives of the digital interface used in the English Language Arts (ELA) Florida Standards Assessment (FSA) Practice Test. The ELA FSA is a high-stakes, standardized, computer-based test used to assess student, teacher, and school performance Prior research has focused on the validity of the test items as opposed to how the interface may affect the response process. Survey and focus group data were collected from teachers and instructional coaches in grades 3 to 8 in one Central Florida school district. Participants expressed that the ELA FSA interface is not user-friendly, along with the students not being …

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Gamification Of Sleep Hygiene Education For Insomnia: An Examination Of Its Efficacy And The Role Of Individual Differences, Christine Seaver Jan 2022

Gamification Of Sleep Hygiene Education For Insomnia: An Examination Of Its Efficacy And The Role Of Individual Differences, Christine Seaver

Electronic Theses and Dissertations, 2020-2023

Insomnia is a sleep disorder which is classified by one's persistent inability to fall asleep or maintain sleep. One common yet controversial approach to treating insomnia is sleep hygiene education (SHE). Sleep hygiene is defined as behaviors that promote quality sleep. SHE is typically provided through as a paper sheet containing a list of recommendations, and the findings regarding its efficacy are mixed. Providing insomnia sufferers with a SHE treatment modality that offers practice, feedback, and motivation may be effective at treating insomnia. Therefore, the first goal of the present study is to examine the efficacy of a game-based SHE …

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Population Persistence And Disease Invasion In Heterogenous Networks, Poroshat Yazdanbakhshghahyazi Jan 2022

Population Persistence And Disease Invasion In Heterogenous Networks, Poroshat Yazdanbakhshghahyazi

Electronic Theses and Dissertations, 2020-2023

The problem of understanding how biological species and infectious diseases can persist and spread in heterogeneous networks has brought a wide attention, recently highlighted due to the COVID-19 pandemic. This dissertation investigates the connection between the structures of heterogeneous networks and population persistence/disease invasion. To do so, we propose a new index for network heterogeneity by employing the Laplacian matrix of population dispersal and its corresponding group inverse. The network growth rate and reproduction number can be evaluated using the network average and the network heterogeneity index as the first and second order approximation, respectively. We also illustrate the impact …

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Struggling For Security: The Complexity Of Nato Burden-Sharing, Tad Schnaufer Ii Jan 2022

Struggling For Security: The Complexity Of Nato Burden-Sharing, Tad Schnaufer Ii

Electronic Theses and Dissertations, 2020-2023

Since the founding of the North Atlantic Treaty Organization (NATO), US administrations have criticized their European allies for not meeting security burden-sharing goals. This study aims to gain insight into what factors motivate alliance members to contribute to the burden-sharing objectives they have agreed to achieve. From a US perspective, the need for its European allies to reach these goals will allow the United States to shift resources to more pressing strategic challenges like the rise of China. Informed by Mancur Olson's theory of collective action and Glenn Snyder's concept of the security dilemma in alliances, this project tests the …

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Elementary Pre-Service Teacher Educators' Digital Writing Knowledge And Practices: A Qualitative Case Study, Kaira Kelly-Howard Jan 2022

Elementary Pre-Service Teacher Educators' Digital Writing Knowledge And Practices: A Qualitative Case Study, Kaira Kelly-Howard

Electronic Theses and Dissertations, 2020-2023

Because preservice teachers will be tasked with the responsibility of preparing their future students for effective communication and engagement in our global society, the experiences and practices related to digital writing that preservice teachers engage in before they begin their practice as full-time educators is critical to their professional development. This qualitative case study investigated two research questions, "How do teacher educators describe their technological, pedagogical, and content knowledge of digital writing?" and "How is teacher educators' knowledge of digital writing practices evident in their teaching?" This study took place at a large university in the Southeastern United States. Documents, …

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Towards More Efficient Collaborative Distributed Data Analysis And Learning, Zixia Liu Jan 2022

Towards More Efficient Collaborative Distributed Data Analysis And Learning, Zixia Liu

Electronic Theses and Dissertations, 2020-2023

Modern information era gives rise to the persistent generation of large amounts of data with rapid speed and broad geographical distribution. Obtaining knowledge and understanding via analysis and learning from such data have invaluable worth. Features of such data analytical tasks commonly include: data can be large scale and geographically distributed; computing capability demand can be enormous; tasks can be time-critical; some data can be private; participants can have heterogeneous capabilities and non-IID data; and multiple simultaneously submitted data analytical tasks can be possible. These bring challenges to contemporary computing infrastructure and learning models. In view of this, we develop …

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Observation Of Anisotropic Properties In Topological Quantum Materials, Gyanendra Dhakal Jan 2022

Observation Of Anisotropic Properties In Topological Quantum Materials, Gyanendra Dhakal

Electronic Theses and Dissertations, 2020-2023

The discovery of the three-dimensional topological insulator (TI) has enormously impacted our understanding of quantum materials. These novel materials are characterized by the topology rather than some order parameters. The TIs are the materials that exhibit insulating properties in the bulk while possessing the metallic state on the surface. These surface states are protected by time-reversal symmetry; as a result, the electrons featuring surface states are spin-polarized. After the discovery of TIs, other topological semimetallic (TSM) states were discovered, which enhanced the understanding and widened the reach of topological materials. Discoveries of various topological phases such as Dirac, Weyl, nodal …

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Improving The Performance And Durability Of Metal Contacts In Crystalline Silicon Solar Cells Using Advanced Characterization, Nafis Iqbal Jan 2022

Improving The Performance And Durability Of Metal Contacts In Crystalline Silicon Solar Cells Using Advanced Characterization, Nafis Iqbal

Electronic Theses and Dissertations, 2020-2023

Solar energy is one of the fastest growing forms of energy generation due to its low cost, lack of emissions, minimal maintenance, and excellent durability. However, like any other technology, it is also not free from defects and degradation, which limit its performance in the real world. Most of the degradation is related to metal contacts, which also happens to be one of the most expensive items in manufacturing, comprising almost half of the cost of converting a silicon wafer into a photovoltaic (PV) cell. Therefore, studying contact degradation to make them reliable and free of defects is the key …

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Complex Dna Mixture Deconvolution By Single Cell Genomics: Direct Physical Cell Subsampling And High Sensitivity Dna Typing, Kaitlin Huffman Jan 2022

Complex Dna Mixture Deconvolution By Single Cell Genomics: Direct Physical Cell Subsampling And High Sensitivity Dna Typing, Kaitlin Huffman

Electronic Theses and Dissertations, 2020-2023

Biological evidence is often found at crime scenes and can comprise of DNA from the victim(s) and perpetrator(s) to a crime as well as from individuals with no direct relationship to the incident. This can complicate analysis as DNA mixtures are one of the more difficult sources of biological evidence to interpret. Probabilistic genotyping (PG) has greatly aided in mixture analysis. However, even with PG, standard bulk mixture approaches do not always result in probative results as allele overlap, artifacts, or low-level minor contributors inevitably cause genotype information loss. Therefore, deconvolution of forensic DNA mixtures into their individual component DNA …

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Volume Bragg Gratings With Complex Phase Structures: A Three-Dimensional Foundation For Laser-Beam Engineering, Lam Mach Jan 2022

Volume Bragg Gratings With Complex Phase Structures: A Three-Dimensional Foundation For Laser-Beam Engineering, Lam Mach

Electronic Theses and Dissertations, 2020-2023

Bragg diffraction is a natural phenomenon that arises from the coherent interference of scattered waves in multilayer structures with a well-defined periodicity. In practice, the physical size of these multilayer structures varies depending on the intended application, from micrometer-thick dielectric mirrors with tens of layers to centimeter-long Bragg gratings with ten-thousands of layers. The scope of this work centers around a unique class of multilayer elements developed in bulk photo-thermo-refractive (PTR) glass – the volume Bragg grating (VBG). The content of this thesis places an emphasis on the volume nature of these Bragg devices, implying a three-dimensional structure whereupon arbitrary …

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Direct Laser Writing Below The Diffraction Limit By Exploring Multi-Pulse-Induced Physics, Boyang Zhou Jan 2022

Direct Laser Writing Below The Diffraction Limit By Exploring Multi-Pulse-Induced Physics, Boyang Zhou

Electronic Theses and Dissertations, 2020-2023

Ultrafast laser ablation has enabled high-precision processing of a wide range of materials including metals, semiconductors, dielectrics, and polymers. Several laser nanostructuring methods exist, including those based on optical near-fields, special material properties, surface plasmons, and multiphoton absorption (MPA). Among these methods, the MPA method has the potential for nanoscale direct laser writing by using a simple experimental setup. However, the understanding of the fundamental mechanism involved in the laser ablation process is still incomplete, and it remains challenging to obtain a feature size much smaller than the diffraction-limited spot size. The goal of this research is to understand how …

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Design Of A High-Power Terahertz Emitter Array Using A High-Temperature Superconductor, Ruqayyah Shouk Jan 2022

Design Of A High-Power Terahertz Emitter Array Using A High-Temperature Superconductor, Ruqayyah Shouk

Electronic Theses and Dissertations, 2020-2023

By applying a dc voltage V across the stack of intrinsic Josephson junctions naturally present in the high-temperature superconductor consisting of two parts bismuth, two parts strontium, one part calcium, two parts copper, and a bit more than eight parts oxygen, several groups have been able to obtain coherent THz emission at output powers in the µW range. In order to enhance the output power well into the mW range suitable for many applications, we have studied a compact design of a stand-alone mesa array with gold layers on the top and bottom of the superconductor. In this design, an …

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The Acute Effects Of Continuous And Intermittent Blood Flow Restriction On Sprint Interval Performance And Muscle Oxygen Responses, Aaron Wizenberg Jan 2022

The Acute Effects Of Continuous And Intermittent Blood Flow Restriction On Sprint Interval Performance And Muscle Oxygen Responses, Aaron Wizenberg

Electronic Theses and Dissertations, 2020-2023

The purpose of this investigation was to examine the effects of intermittent and continuous blood flow restriction (BFR) during sprint interval training (SIT) on muscle mitochondrial function and perceived effort. Fifteen men volunteered to participate in this investigation and were randomly assigned to complete SIT with CBFR, IBFR, and NoBFR. Each SIT session consisted of 2, 30s maximal sprints on a cycle ergometer with a resistance of 7.5% of body mass. Peak power (PP), total work (TW), ratings of perceived exertion (RPE), sprint decrement score (Sdec), and muscle oxygen responses were measured during each sprint. Before (pretest) and after (posttest) …

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Ground Penetrating Radar And Public Archaeology At Eastonville Memorial Gardens Cemetery, Richard Ott Jan 2022

Ground Penetrating Radar And Public Archaeology At Eastonville Memorial Gardens Cemetery, Richard Ott

Electronic Theses and Dissertations, 2020-2023

This thesis explores the intersection of geophysical prospection methods such as ground penetrating radar (GPR) and public archaeology through a case study with the descendant community of Eatonville Memorial Gardens, an African American cemetery located in Central Florida. This moves beyond traditional uses of GPR, such as focusing on locating unmarked burials by engaging the descendant community in each stage of the research project. This expanded focus is advocated for because cemeteries serve as ancestral landscapes providing such communities with a sense of place and history. The maintenance and care of such places often reflect the same social conditions affecting …

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Synchronous Raman Microspectroscopy And Laser Beam Induced Current Measurements As A Metrology Tool For Solar Cells And Optoelectronic Devices, Jeya Prakash Ganesan Jan 2022

Synchronous Raman Microspectroscopy And Laser Beam Induced Current Measurements As A Metrology Tool For Solar Cells And Optoelectronic Devices, Jeya Prakash Ganesan

Electronic Theses and Dissertations, 2020-2023

This works developed synchronous Raman microspectroscopy with laser beam induced current (LBIC) measurements to generate insights into structure-property correlations in finished solar cell modules. Raman spectroscopy is a powerful, non-destructive technique to examine phase and composition of materials where a laser beam excites characteristic vibrational modes of chemical bonds in a material. Conducting Raman spectroscopy under a microscope (i.e., Raman microspectroscopy) with confocal capabilities allows the chemical constituents to be mapped with high spatial resolution in the x, y and z directions. Simultaneously, the excitation laser from Raman can also generate photocarriers in a semiconductor. In a solar cell, these …

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A Qualitative Inquiry Into Scholarly Publishing Between Librarians And Subject Faculty, Michael Furlong Jan 2022

A Qualitative Inquiry Into Scholarly Publishing Between Librarians And Subject Faculty, Michael Furlong

Electronic Theses and Dissertations, 2020-2023

This is a phenomenological exploration of academic librarians collaboratively publishing with subject faculty. The explorative study investigates academic librarians and subject faculty who conduct research outside of librarianship. The purpose of this qualitative inquiry is an exploration of barriers subject faculty members and academic librarians encounter when conducting collaborative research. The study was performed because of an identifiable research gap and a paucity of qualitative studies related to librarian and faculty research partnerships. Much of the existing scholarship focuses on quantitative data exploring librarians' publishing outcomes. Data collection was performed by interviewing five academic librarians and five subject faculty pairs. …

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Machine Learning Algorithms For Forecasting The Impacts Of Connected And Automated Vehicles On Highway Construction Costs, Amirsaman Mahdavian Jan 2022

Machine Learning Algorithms For Forecasting The Impacts Of Connected And Automated Vehicles On Highway Construction Costs, Amirsaman Mahdavian

Electronic Theses and Dissertations, 2020-2023

A multitude of externalities affects transport efficiency and numbers of trips. Population expansion, urban development, political issues, fiscal trends, and growth in the field of connected, automated, shared, and electric (CASE) vehicles have all played prominent roles. While the market is keenly aware of the upcoming shift to the CASE vehicles, the transformation itself is reliant upon the development of technologies, customer outlook, and guidelines. The purpose of this research is to establish an overview of the possible network design problems, as well as potential consequences to vehicle automation systems by employing machine learning and system dynamics analysis. Finally, the …

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