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Fundamental Properties Of Metallic Nanolasers, William Hayenga
Fundamental Properties Of Metallic Nanolasers, William Hayenga
Electronic Theses and Dissertations
The last two decades have witnessed tremendous advancements in the area of nanophotonics and plasmonics, which has helped propel the development of integrated photonic sources. Of central importance to such circuits is compact, scalable, low threshold, and efficient coherent sources that can be driven at high modulation frequencies. In this regard, metallic nanolasers offer a unique platform. Their introduction has enabled confinement of light at a subwavelength scale and the ultra-small size of the modes afforded by these structures allows for cavity enhancing effects that can help facilitate thresholdless lasing and large direct modulation bandwidths. In this report, I present …
Assisted Living: Stories, Donovan Swift
Assisted Living: Stories, Donovan Swift
Electronic Theses and Dissertations
Assisted Living is a collection of stories that explores themes of parenthood, brotherhood, old and new love, adultery, financial strife, and the many faces of loss. The collection offers different points of view, which allow the reader to experience these themes within varying lives and situations. For example, the eponymous "Assisted Living" is from the perspective of a pet-sitter at the brink of losing both her job and husband, while "Holy Mother" explores the point of view of a wife coming to terms with her affair and the physical injury that has changed her husband. "The World of Reptiles" follows …
Pooling Correlation Matrices Corrected For Selection Bias: Implications For Meta-Analysis, Kenneth Matthews
Pooling Correlation Matrices Corrected For Selection Bias: Implications For Meta-Analysis, Kenneth Matthews
Electronic Theses and Dissertations
Selection effects systematically attenuate correlations and must be considered when performing meta-analyses. No research domain is immune to selection effects, evident whenever self-selection or attrition take place. In educational research, selection effects are unavoidable in studies of postsecondary admissions, placement testing, or teacher selection. While methods to correct for selection bias are well documented for univariate meta-analyses, they have gone unexamined in multivariate meta-analyses, which synthesize more than one correlation from each study (i.e., a correlation matrix). Multivariate meta-analyses of correlations provide opportunities to explore complex relationships and correcting for selection effects improves the summary effect estimates. I used Monte …
Modeling And Transient Simulation Of A Fully Integrated Multi-Pressure Heat Recovery Steam Generator Using Siemens T3000, Jonathan Mcconnell
Modeling And Transient Simulation Of A Fully Integrated Multi-Pressure Heat Recovery Steam Generator Using Siemens T3000, Jonathan Mcconnell
Electronic Theses and Dissertations
The focus of this research is on the transient thermodynamic properties and dynamic behavior of a Heat Recovery Steam Generator (HRSG). An HRSG is a crossflow heat exchanger designed for the extraction of energy from the hot exhaust gas of a traditional power plant through boiling induced phase change. Superheated steam is sent through a turbine to generate additional power, raising the overall efficiency of a power plant. The addition of renewable energies and the evolution of smart grids have brought forth a necessity to gain a comprehensive understanding of transient behavior within an HRSG in order to efficiently manage …
Selecting Methods To Teach Controversial Topics: A Grounded Theory Study, Sean Loomis
Selecting Methods To Teach Controversial Topics: A Grounded Theory Study, Sean Loomis
Electronic Theses and Dissertations
This grounded theory study examined the perceptions of 14 high school social studies teachers from three school districts in the Central Florida area. They were interviewed to uncover the decision-making process that high school social studies teachers use to choose methodologies when teaching controversial public issues (CPIs). The result was a three-phase model, the CPI Decision-Making Model, in which teachers move through three conceptual phases to decide on a particular methodology. By working through this process, teachers analyze the benefits and drawbacks of different methods for teaching controversial public issues. Significant results from this study included: (a) teachers were choosing …
The Sustained Impact Of Prekindergarten Participation On Third Grade Academic Performance, Marissa Melin
The Sustained Impact Of Prekindergarten Participation On Third Grade Academic Performance, Marissa Melin
Electronic Theses and Dissertations
In this study, the researcher investigated whether the impact of participating in a prekindergarten program on academic achievement persists through third grade. The study compared three groups of students: students who participated in voluntary prekindergarten, private prekindergarten, and students who did not participate in any prekindergarten program. Using a series of two-factor multivariate analyses of variance (MANOVAs), this investigation found no interaction effects among prekindergarten participation and race, gender, socioeconomic status, presence of a discipline referral, or chronic absenteeism on academic achievement in the third grade. However, there was a main effect for the type of prekindergarten program on academic …
Teachers' Perceptions Of Safety Regarding School Shootings, Megan Olive
Teachers' Perceptions Of Safety Regarding School Shootings, Megan Olive
Electronic Theses and Dissertations
As a result of high media attention surrounding school shootings in recent years, it may appear that American public schools are becoming dangerous places (Schildkraut & Elsass, 2016; Elsass, Schildkraut, & Stafford, 2016; Toppo, 2013). Though schools remain to be one of the safest locations for children, various safety measures are discussed and implemented in schools to combat this perceived problem and ensure the safety of school campuses. Discussions of best safety practices spikes directly following a school shooting event from relevant parties, such as school administration, law enforcement agencies, parents, and students, (Crawford & Burns, 2015; Chrusciel, Wolfe, Hansen, …
The Ecology Of Central Florida's Thief Ants (Hymenoptera: Formicidae: Solenopsis), Leo Ohyama
The Ecology Of Central Florida's Thief Ants (Hymenoptera: Formicidae: Solenopsis), Leo Ohyama
Electronic Theses and Dissertations
Thief ants of the genus Solenopsis are a diverse group of ants that are found in ant communities throughout the world. They have long been purported to practice lestobiosis, an interaction between small and larger-bodied ants, where small ants cryptically tunnel into larger-bodied ant nests within the subterranean environment and steal brood or eggs for consumption. Thief ants are extremely small, measuring 1-2 mm in length and many of the species within this group practice a subterranean life history, where they live the entirety of their lives exclusively belowground. Due to these key characteristics, the ecology and natural history of …
Protective Behavioral Strategies And Alcohol-Related Sex Among College Students, Roselyn Peterson
Protective Behavioral Strategies And Alcohol-Related Sex Among College Students, Roselyn Peterson
Electronic Theses and Dissertations
Adverse sexual outcomes (e.g., sexual regret, sexual risk, and sexual assault) are a common experience among college students. In particular, regretted sex is reported by a third of college students and may result in psychological harm. Previous literature has found that alcohol is involved in approximately one third of regretted sex experienced by college students. A gap exists in the literature identifying who is more susceptible to experiencing a regretted sexual experience. Previous research has shown that students who implement protective behavioral strategies (PBS) while drinking are able to reduce alcohol-related negative consequences, including regretted sexual experiences. Three sub-types of …
Correctness And Progress Verification Of Non-Blocking Programs, Christina Peterson
Correctness And Progress Verification Of Non-Blocking Programs, Christina Peterson
Electronic Theses and Dissertations
The progression of multi-core processors has inspired the development of concurrency libraries that guarantee safety and liveness properties of multiprocessor applications. The difficulty of reasoning about safety and liveness properties in a concurrent environment has led to the development of tools to verify that a concurrent data structure meets a correctness condition or progress guarantee. However, these tools possess shortcomings regarding the ability to verify a composition of data structure operations. Additionally, verification techniques for transactional memory evaluate correctness based on low-level read/write histories, which is not applicable to transactional data structures that use a high-level semantic conflict detection. In …
Estimation And Clustering In Statistical Ill-Posed Linear Inverse Problems, Rasika Rajapakshage
Estimation And Clustering In Statistical Ill-Posed Linear Inverse Problems, Rasika Rajapakshage
Electronic Theses and Dissertations
The main focus of the dissertation is estimation and clustering in statistical ill-posed linear inverse problems. The dissertation deals with a problem of simultaneously estimating a collection of solutions of ill-posed linear inverse problems from their noisy images under an operator that does not have a bounded inverse, when the solutions are related in a certain way. The dissertation defense consists of three parts. In the first part, the collection consists of measurements of temporal functions at various spatial locations. In particular, we study the problem of estimating a three-dimensional function based on observations of its noisy Laplace convolution. In …
The Relativistic Harmonic Oscillator And The Generalization Of Lewis' Invariant, Daniel Reinhart
The Relativistic Harmonic Oscillator And The Generalization Of Lewis' Invariant, Daniel Reinhart
Electronic Theses and Dissertations
In this thesis, we determine an asymptotic solution for the one dimensional relativistic harmonic oscillator using multiple scale analysis and relate the resulting invariant to Lewis' invariant. We then generalize the equations leading to Lewis' invariant so they are relativistically correct. Next we attempt to find an asymptotic solution for the general equations by making simplifying assumptions on the parameter characterizing the adiabatic nature of the system. The first term in the series for Lewis' invariant corresponds to the adiabatic invariant for systems whose frequency varies slowly. For the relativistic case we find a new conserved quantity and seek to …
Frequency-Reconfigurable Microstrip Patch And Cavity-Backed Slot Espars, Wei Ouyang
Frequency-Reconfigurable Microstrip Patch And Cavity-Backed Slot Espars, Wei Ouyang
Electronic Theses and Dissertations
Wireless communication systems have rapidly evolved over the past decade which has led to an explosion of mobile data traffic. Since more and more wireless devices and sensors are being connected, the transition from the current 4G/LTE mobile network to 5G is expected to happen within the next decade. In order to improve signal-to-noise ratio (SNR), system capacity, and link budget, beam steerable antenna arrays are desirable due to their advantage in spatial selectivity and high directivity. Electronically steerable parasitic array radiator (ESPAR) that can achieve low-cost continuously beamsteering using varactor diodes have attracted a lot of attention. This dissertation …
Scalable Map Information Dissemination For Connected And Automated Vehicle Systems, S. M. Osman Gani
Scalable Map Information Dissemination For Connected And Automated Vehicle Systems, S. M. Osman Gani
Electronic Theses and Dissertations
Situational awareness in connected and automated vehicle (CAV) systems becomes particularly challenging in the presence of non-line of sight objects and/or objects beyond the sensing range of local onboard sensors. Despite the fact that fully autonomous driving requires the use of multiple redundant sensor systems, primarily including camera, radar, and LiDAR, the non-line of sight object detection problem still persists due to the inherent limitations of those sensing techniques. To tackle this challenge, the inter-vehicle communication system is envisioned that allows vehicles to exchange self-status updates aiming to extend their effective field of view and thus compensate for the limitations …
Central Florida School Districts' Responses To Hispanic Growth, 1980-2010, Kendra Hazen
Central Florida School Districts' Responses To Hispanic Growth, 1980-2010, Kendra Hazen
Electronic Theses and Dissertations
Since the 1980s, Hispanics have been the fastest growing minority in the United States and have been moving into rural, Southern areas where there have previously not been populations of Hispanics. Studies of these demographic changes have concentrated on how communities impacted by the influx of Hispanics have created or adjusted socioeconomic and political infrastructures to accommodate the linguistic and cultural needs of the Hispanic population. The public-school system is a sociopolitical structure that has affected and has been affected by the increase in Hispanics. Whereas the modern Civil Rights movement had created legal precedence for students' language rights and …
Unraveling Pdi And Its Interaction With Ab Toxins, Jessica Guyette
Unraveling Pdi And Its Interaction With Ab Toxins, Jessica Guyette
Electronic Theses and Dissertations
Protein disulfide isomerase (PDI) is an essential endoplasmic reticulum (ER) protein that acts as both an oxidoreductase and chaperone. It exhibits substantial flexibility and undergoes cycles of unfolding and refolding in its interaction with cholera toxin (Ctx), which is a unique property of PDI. This unfolding allows PDI to disassemble the Ctx holotoxin, which is required for Ctx activity. Here, we investigated the unfolding and refolding property of PDI and how this affects its interaction with bacterial toxins. PDI showed remarkable redox-linked conformational resilience that allows it to refold after being thermally stressed. Deletion constructs of PDI showed that both …
Action Recognition, Temporal Localization And Detection In Trimmed And Untrimmed Video, Rui Hou
Action Recognition, Temporal Localization And Detection In Trimmed And Untrimmed Video, Rui Hou
Electronic Theses and Dissertations
Automatic understanding of videos is one of the most active areas of computer vision research. It has applications in video surveillance, human computer interaction, video sports analysis, virtual and augmented reality, video retrieval etc. In this dissertation, we address four important tasks in video understanding, namely action recognition, temporal action localization, spatial-temporal action detection and video object/action segmentation. This dissertation makes contributions to above tasks by proposing. First, for video action recognition, we propose a category level feature learning method. Our proposed method automatically identifies such pairs of categories using a criterion of mutual pairwise proximity in the (kernelized) feature …
Hurricane Maria: A Qualitative Study Of Recently Displaced Students To The State Of Florida, Esmeralda Cabrera
Hurricane Maria: A Qualitative Study Of Recently Displaced Students To The State Of Florida, Esmeralda Cabrera
Electronic Theses and Dissertations
Over the past ten years Puerto Rico has been experiencing a severe economic crisis that was worsened when Hurricane Maria made landfall on September 20, 2017. Maria hit Puerto Rico as a category 4 storm, devastating the whole island and its 3.4 million residents. Many students were left with minimal educational choices after Hurricane Maria hit Puerto Rico. Research on Latino/a students shows that they are met with unique experiences and challenges as they pursue higher education. The current study uses qualitative data to investigate what are the unique challenges and needs of displaced students from Puerto Rico? and what …
Bone Morphogenetic Protein 7 Inhibits Pyroptotic Cell Death In Vascular Smooth Muscle Cells Of Atherosclerotic Apolipoprotein E -/- Mice, Kaley Garner
Electronic Theses and Dissertations
Atherosclerosis (ATH) is an inflammation-mediated disease in which cell death underlies the formation of lesions along the intima layer of vascular walls resulting in vessel narrowing, decreased blood flow, and increased risk of lesion rupture leading to myocardial infarction and stroke. The current study was undertaken to investigate whether inflammation in ATH can induce pyroptosis in vascular smooth muscle cells (SMC's). We therefore hypothesized that pyroptosis occurs and is inhibited by bone morphogenetic protein 7 (BMP7). We examined SMC pyroptosis at acute (D5) and midstage (D28) following disturbed flow-induced hemodynamic injury to the vascular wall using our partial left carotid …
A Narrative Research Study Of Self-Selected Tracking On Motivation In 10th Grade English Language Arts Classes, Audra Greuel
A Narrative Research Study Of Self-Selected Tracking On Motivation In 10th Grade English Language Arts Classes, Audra Greuel
Electronic Theses and Dissertations
The practice of tracking has had longstanding negative impacts on students, especially students in lower academic tracks. This research suggests that tracking develops the themes of a narrative of deficit through inequality and exclusion and impedes student motivation due to the negative implications. A common finding of outside research studies was that of disapproval for the current school organizational structure of tracking due to the negative consequences on students. Furthermore, several research studies developed an outline of positive ways to advocate for a unifying system of educational change. Educational leaders should heed the suggestions of researchers to promote changes within …
The Wonder Women: Understanding Feminism In Cosplay Performance, Amber Grissom
The Wonder Women: Understanding Feminism In Cosplay Performance, Amber Grissom
Electronic Theses and Dissertations
Feminism conjures divisive and at times conflicting thoughts and feelings in the current political climate in the United States. For some, Wonder Woman is a feminist icon, for her devotion to truth, justice, and equality. In recent years, Wonder Woman has become successful in the film industry, and this is reflected by the growing community of cosplayers at comic book conventions. In this study, I examine gender performativity, gender identity, and feminism from the perspective of cosplayers of Wonder Woman. I collected ethnographic data using participant observation and semi-structured interviews with cosplayers at comic book conventions in Florida, Georgia, and …
A Smart Uav Platform For Railroad Inspection, Ryan Debevec
A Smart Uav Platform For Railroad Inspection, Ryan Debevec
Electronic Theses and Dissertations
Using quadcopters for analysis of an environment has been an intriguing subject of study recently. The purpose of this work is to develop a fully autonomous UAV platform for Railroad inspection The dynamics of the quadrotor is derived using Euler's and Newton's laws and then linearized around the hover position. A PID controller is designed to control the states of the quadrotor in a manner to effectively follow a vision-based path, using the down facing camera on a Parrot Mambo quadrotor. Using computer vision the distance from the position of the quadrotor to the position of the center of the …
Lithium Polysulfide Battery With Improved Capacity And Cycle Performance Using Carbon Black Coated Free-Standing Carbon Cloth, Zhen Wei
Electronic Theses and Dissertations
Lithium ion batteries (LIBs) have been used in various applications such as portable electronics, grid storages, and electric vehicles (EVs). Despite its commercial success, further advancement of the battery is necessary to satisfy the increasing demands for low-cost and high- performance energy storage devices as LIB is reaching its theoretical limits. Lithium sulfur battery (LSB) is one of the promising candidates for the next generation energy storage technologies. LSB uses sulfur cathode which is a low-cost and earth abundant material with an extremely high theoretical capacity of 2600 Wh kg-1. Although there have been numerous researches aiming to establish the …
Spatial Models With Specific Error Structures, Nathaniel Adu
Spatial Models With Specific Error Structures, Nathaniel Adu
Electronic Theses and Dissertations
The purpose of this dissertation is to study the first order autoregressive model in the spatial context with specific error structures. We begin by supposing that the error structure has a long memory in both the i and the j components. Whenever the model parameters alpha and beta equal one, the limiting distribution of the sequence of normalized Fourier coefficients of the spatial process is shown to be a function of a two parameter fractional Brownian sheet. This result is used to find the limiting distribution of the periodogram ordinate of the spatial process under the null hypothesis that alpha …
Adsorption Capacity Assessment Of Advance Green Environmental Media To Remove Nutrients From Stormwater-Runoff, Hanan Elhakiem
Adsorption Capacity Assessment Of Advance Green Environmental Media To Remove Nutrients From Stormwater-Runoff, Hanan Elhakiem
Electronic Theses and Dissertations
Best Management Practices (BMPs) in stormwater treatment are a suite of treatment alternatives to deal with pollutant removal problems from stormwater runoff. Biosorption-activated media (BAM) are green sorption media consists of recycled materials have shown excellent nutrient removal as an effective BMP by enhancing physicochemical and microbiological processes. In this study, Iron-Filling Green Environmental Media (denoted as IFGEM-3) and Advanced Green Environmental Media 1 and 2 (denoted as AGEM-1 and AGEM-2) were produced and tested for their adsorption capacities as well as removal and recovery potential for phosphate, nitrate, and ammonia against natural soil (baseline) collected from a stormwater retention …
Interfacial Behavior In Polymer Derived Ceramics And Salt Water Purification Via 2d Mos2, Hao Li
Interfacial Behavior In Polymer Derived Ceramics And Salt Water Purification Via 2d Mos2, Hao Li
Electronic Theses and Dissertations
In the present dissertation, the behavior of the internal potential barrier in a polymer-derived amorphous SiAlCN ceramic was studied by measuring its complex impedance spectra at various dc bias as well as different testing and annealing temperatures. The complex impedance spectra of the polymer-derived a-SiAlCN were measured under various dc bias voltages in a temperature range between 50 and 150°C, as well as different annealing temperatures (1100-1400 °C). All spectra, regardless of temperature and bias, consist of two semi-circular arcs, corresponding to the free-carbon phase and the interface, respectively. The impedance of the free-carbon phase is independent of the bias, …
The Life Experiences Of Women With An Intellectual Disability Who Were Sexually Assaulted, Jillian Schreffler
The Life Experiences Of Women With An Intellectual Disability Who Were Sexually Assaulted, Jillian Schreffler
Electronic Theses and Dissertations
The views of those with an intellectual disability (ID) on sexuality is not a topic many are willing to broach. Many challenges exist for those identified with ID when it comes to sexual education, including a lack of appropriate curricula; a lack of trained school personnel; the inability of school, state, and national stakeholders to agree on policy or curriculum content; and the generalizability of the content. These challenges are heightened by an increase in sexual assault of women with ID. To improve sexual assault prevention skills, the researcher conducted a phenomenological study to identify the current status of sexual …
The Causes, Dynamics, And Implications Of Child Soldiering, Christopher Faulkner
The Causes, Dynamics, And Implications Of Child Soldiering, Christopher Faulkner
Electronic Theses and Dissertations
Child soldiers continue to be regular participants in modern conflicts in many different parts of the world. This dissertation addresses several interrelated questions about child soldiering employing large-N statistical analyses, process-tracing, and in-depth interviews. First, it asks how foreign state support and the characteristics of these donors influence rebels' recruitment of child soldiers. An important finding is that rebels supported by democratic states are less likely to employ child soldiers. It then investigates the factors and conditions that lead some groups to diversify their demographics in the types of recruits and others to not. Specifically, it considers why a rebel …
The Invisible Men: Analyzing The Virtual Subculture Of England's Punters, Ashley Christensen
The Invisible Men: Analyzing The Virtual Subculture Of England's Punters, Ashley Christensen
Electronic Theses and Dissertations
Research on prostitution has flourished over the last few decades with a new emphasis on the online sex market. To study the online market, researchers have utilized qualitative methods to investigate escort review websites. Coding for violent rhetoric and perceived intimacy are two conventional techniques that have been utilized using qualitative methods. Other areas investigated include the overall characteristics of sex buyers, price variation, and socialization of buyers. What has lacked in current literature has been the use of quantitative methods to study what factors influence the presence of positive reviews. To expand on limited existing literature utilizing quantitative methods, …
A Comparison Of Sixth-Grade English Language Arts And Mathematics Achievement Between Middle Schools And K-8 Schools, Brennan Asplen
A Comparison Of Sixth-Grade English Language Arts And Mathematics Achievement Between Middle Schools And K-8 Schools, Brennan Asplen
Electronic Theses and Dissertations
The purpose of this study was to compare the academic achievement of sixth grade students enrolled in a traditional middle school model versus those enrolled in a K-8 school model by analyzing English Language Arts (ELA) and mathematics scores. Developmental Scale Score (DSS) data from the 2017 Florida Standards Assessment (FSA) were collected from three K-8 schools and three middle schools in one high-performing Florida school district. Results from an independent samples t-test revealed that middle school student scores were slightly higher in overall ELA and mathematics proficiency, but the differences were not substantive. Cross-tabulation was utilized to compute the …