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Articles 2461 - 2490 of 10052
Full-Text Articles in Entire DC Network
Molecular Dynamics Simulation Study On Thermal Conduction Of Cnt-Cu/Al Composites With New Meam Potentials Between C And Cu/Al, Luyang Ren
Electronic Theses and Dissertations, 2020-2023
Carbon nanotubes (CNTs) have been a promising material for thermal management applications including micro/nano-electromechanical system (MEMS/NEMS) due to their extremely high thermal conductivity values. CNTs-reinforced Cu/Al (CNT-Cu/Al) composites are attractive to meet all-around requirements on high thermal performance materials to be applied in many areas, such as aerospace, automotive and electronic packaging. However, the experimental results on resultant thermal conductivity of these composites are far from expectation due to the law of mixture. In this research, molecular dynamics (MD) simulation is used to study the thermal conduction of CNT-Cu/Al composites. Before the simulation is conducted, new inter-atomic potentials for the …
Separating Content Selection From Surface Realization In Neural Text Summarization, Logan Lebanoff
Separating Content Selection From Surface Realization In Neural Text Summarization, Logan Lebanoff
Electronic Theses and Dissertations, 2020-2023
Text summarization is a rapidly growing field with many new innovations. End-to-end models using the sequence-to-sequence architecture achieve high scores according to automatic metrics on standard datasets. However, they frequently generate summaries that are factually inconsistent with the original article -- a vital problem to be solved before the summaries can be used in real-world applications. In addition, they are not generalizable to new domains, especially those with few training examples. In this dissertation, we propose to explicitly separate the two steps of content selection and surface realization in summarization. Content selection is the process of choosing important words/phrases/sentences from …
Enhancement Of Absorptance By Ultrafast Laser Pulse Shaping For Efficient Laser Processing Of Thin Polymers, Arifur Rahaman
Enhancement Of Absorptance By Ultrafast Laser Pulse Shaping For Efficient Laser Processing Of Thin Polymers, Arifur Rahaman
Electronic Theses and Dissertations, 2020-2023
Ultrashort-pulsed lasers have been used for high precision processing of a wide range of materials including dielectrics, semiconductors, metals, and polymers/polymer composites, enabling numerous applications ranging from micromachining, photonics to life sciences. However, there are challenges when applying this technology in the industry, which requires scale and throughput different from lab use. The goal of this research is to understand how ultrafast laser pulses interact with thin polymers/polymer composite materials and develop a method that is efficient for ultrafast laser processing of these materials. It is a common practice in industrial applications to run the laser at a high repetition …
Active Assailant Crisis Prevention And Response: An Analysis Of Teacher Perceptions, John Courson
Active Assailant Crisis Prevention And Response: An Analysis Of Teacher Perceptions, John Courson
Electronic Theses and Dissertations, 2020-2023
A limited amount of research was found regarding teacher perceptions of their ability to respond to an active shooter incident. This study was intended to provide relevant information for school leaders to use in their efforts to improve school safety measures. Data was collected in a mixed-methods, explanatory model research study using a survey, the Active Assailant Prevention and Response Survey (AAPRS), and semi-structured interviews. Teachers enrolled in graduate-level education courses at a large university in the southeastern United States made up the study's population. A majority of the sample population agreed that they were confident in the planning protocol …
An Exploration Of Interactions Between Institutional Agents And College Students Who Are Undocumented In The U.S., Doris Alcivar
An Exploration Of Interactions Between Institutional Agents And College Students Who Are Undocumented In The U.S., Doris Alcivar
Electronic Theses and Dissertations, 2020-2023
The purpose of this qualitative study was to explore the awareness, knowledge, and skills of institutional agents who interact with college students who are undocumented, to inform professional development and practice. Through a survey and interviews, participants revealed familiarity with students who are undocumented and discussed the support provided to them. All interview participants understood the experience of assisting students who are undocumented, as evidenced by six major themes: (a) an understanding of student financial needs, (b) recognizing students' anxiety, (c) providing consistent guidance, (d) establishing supportive collaborations, (e) gaining foundational knowledge, and (f) sharing professional development with others. Participants …
Development Of High-Power Single-Mode Yb-Doped Fiber Amplifiers And Beam Analysis, Steffen Wittek
Development Of High-Power Single-Mode Yb-Doped Fiber Amplifiers And Beam Analysis, Steffen Wittek
Electronic Theses and Dissertations, 2020-2023
High-power fiber laser systems enjoy a widespread use in manufacturing, medical, and defense applications as well as scientific research, due to their remarkable power scalability, high electrical to optical efficiency, compactness and ruggedness. However, single-mode fiber power scaling has stagnated in the past years, primarily due to the onset of nonlinear effects such as stimulated Brillouin/Raman scattering and transverse modal instabilities. This thesis addresses the analysis and mitigation of transverse modal instabilities in high-power fiber amplifiers. I describe the high-power fiber amplifier testbed that I set up to test fibers fabricated in house. I will show our results of a …
Mirrors For Monsters: A Journey Towards Self-Acknowledgement And Nuanced Representation In Film, Alejandro Watson
Mirrors For Monsters: A Journey Towards Self-Acknowledgement And Nuanced Representation In Film, Alejandro Watson
Electronic Theses and Dissertations, 2020-2023
Mirrors for Monsters is a body of work created by Alejandro Watson in partial fulfillment of the requirements for earning a Master of Fine Arts in Entrepreneurial Digital Cinema from the University of Central Florida. The body of work consists of a feature length documentary, MHD, several installations (Self-Acknowledgement/Self-Acceptance, Garden of Bodies, Why Am I Like This?, Not My Thoughts), several short video pieces (In A Dream I Saw A Way to Survive and I Was Full of Joy, Car Ride (Baker Act Version), My Lunch With Andy, Prompts) and an art book, It's All Good. The body experiments with …
Fluoresence Spectra Study Of Sterically Strained Isomers Of C24h14 Polycyclic Aromatic (Pahs) & Characterization Of A Bio-Sourced, Fluoresent, Ratiometric Ph Indicator With Alkaline Pka, Samar Abd Alelah
Electronic Theses and Dissertations, 2020-2023
This thesis is composed to two studies, each of which relies on recent advances in time-dependent density functional theory (TD-DFT) to accurately model fluorescence spectra. The first study focuses on evaluating the fluorescence spectrum of polycyclic aromatic hydrocarbons (PAHs) having a molecular weight of 302. Three isomers are analyzed including dibenzo[a,j]fluoranthene, dibenzo[a,k]fluoranthene and dibenzo[a,l]fluoranthene. These isomers differ in the placement of one of six aromatic rings and in the amount that each molecule deviates from planarity. The TD-DFT methods are used to compute spectra in an environment that simulates solvent (n-hexane). These computed spectra are compared to vibronically resolved experimental …
Factors Affecting The Performance Of Photo-Voltaic Solar Energy Storage, Vasanth Bhat
Factors Affecting The Performance Of Photo-Voltaic Solar Energy Storage, Vasanth Bhat
Electronic Theses and Dissertations, 2020-2023
One of the most important factors in a nation's development is energy availability. All the aspects of its economy are directly proportional to the energy resources. Oil is one of the most sought energy resources currently. Solar energy is one of the most important renewable sources of energy available to us. With oil deposits depleting and current global warming, there is an emphasis on using more and more renewable sources or clean energy. This has led to immense research on solar cells and how it could better be used to get maximum output. Storage of energy is another aspect that …
Deeper Impressions Of Thomas Nast And Joseph Keppler: Analyzing The Role Of Political Cartoons In The Development And Perceptions Of Late Nineteenth Century Group Images, Timothy Dorsch
Electronic Theses and Dissertations, 2020-2023
This paper analyzes political cartoons from Thomas Nast and Joseph Keppler from the late 1860s through the mid-1880s. It argues that through use of effective symbolism and memorable illustrations, these cartoonists created and popularized caricatures of politicians, laborers, Irish Catholics, African Americans, and women that validated stereotypical views of the late nineteenth century and influenced later historical interpretations of the era. Analyzing the Nast and Keppler cartoons as significant historical resources rather than as interesting illustrations for historical monographs reveals the layers of literacy, social and political thought present in the drawings that the readers of the day would have …
Naming More Of What We Know: Critical Memoirs & The Ecological Metaphor As A Threshold Concept In Writing, Loren Cooper
Naming More Of What We Know: Critical Memoirs & The Ecological Metaphor As A Threshold Concept In Writing, Loren Cooper
Electronic Theses and Dissertations, 2020-2023
"Naming More of What We Know: Critical Memoirs & the Ecological Metaphor as a Threshold Concept in Writing" contributes to the work begun by Adler-Kassner and Wardle to gather and name Writing Studies' body of disciplinary knowledge as "threshold concepts." This thesis answers their call to engage in the ongoing development of threshold concepts by offering an additional critical construct: Writing as ecological. To explicitly acknowledge that writing is ecological is an essential addition to the content of our knowledge because it (1) meets the threshold-concept criteria adapted from Meyer and Land (2003), (2) establishes a codified, embodied, 3-dimensional system …
Family Mass Homicide: An Investigation, Alec Szalewski
Family Mass Homicide: An Investigation, Alec Szalewski
Electronic Theses and Dissertations, 2020-2023
Operationalizing mass murder consistently has yet to be achieved. Mass homicide definitions often use time and space, but other key factors (e.g., victim count) vary widely across literature and agencies. Because of this, the current study argues for a mass family homicide definition of two or more victims, not including the offender, with no method of killing requirement. The purpose of using this victim count derives from the average family size and how many victims can be killed before an entire family annihilation. Next, using the suggested definition, three exploratory logistic regression models were run to further the understanding and …
Transcendence, William Rincon
Transcendence, William Rincon
Electronic Theses and Dissertations, 2020-2023
Transcendence is a novel that examines masculinity and self-acceptance in the modern era: How do we move on from wrongs done by others and our own mistakes? A coming-of-age novel, Transcendence follows Cassiel, a young man in his mid-twenties, as he searches for his absent father and finds himself in a monastery where monks have strange abilities. He decides to learn meditation and find the source of his unhappiness through trials that test his discipline and faults. With the promise of enlightenment and learning what happened to his long-lost father, Cassiel completes each trial and comes closer to finding the …
Few-Mode Fiber Lasers And Amplifiers, Ning Wang
Few-Mode Fiber Lasers And Amplifiers, Ning Wang
Electronic Theses and Dissertations, 2020-2023
Lasers and amplifiers of high-order spatial modes are useful for a number of applications, including communication, sensing, microscopy, and laser material processing. This dissertation presents the generation and amplification of high-order spatial modes in few-mode fibers (FMFs). In the area of amplification of high-order spatial modes, low-crosstalk amplification among spatial modes is realized in a retro-reflecting few-mode Er-doped fiber amplifier (EDFA) by exploiting the unitary property of the coupling matrix of a symmetric photonic lantern (PL). A small-signal gain larger than 25 dB and crosstalk below -10 dB was achieved over the C-band for a 3-mode EDFA. Such a few-mode …
Water Reclamation Using Functionalized Forward Osmosis Membrane, Fnu Joshua
Water Reclamation Using Functionalized Forward Osmosis Membrane, Fnu Joshua
Electronic Theses and Dissertations, 2020-2023
This study investigated water reclamation from an impaired-quality water using forward osmosis (FO) membrane functionalized by nano zero valent iron (nZVI) loaded polyelectrolyte multilayer films. Stormwater runoff was selected as the impaired-quality water, which served as a feed solution (FS) and a NaCl salt solution at a concentration representing reverse osmosis (RO) concentrate was used a draw solution (DS). RO concentrate is another impaired-quality water that is discharged to the environmental with little or no treatment. A commercial cellulose triacetate (CTA) FO membrane was modified using poly allylamine hydrochloride (PAH) (a polycation) and poly acrylic acid (PAA) (a polyanion) following …
Does One Bad Phish Spoil The Whole Email Load?: Exploring Phishing Susceptibility Task Factors And Potential Interventions, Dawn Sarno
Electronic Theses and Dissertations, 2020-2023
Phishing emails have become a prevalent cybersecurity threat for the modern email user. Research attempting to understand how users are susceptible to phishing attacks has been limited and hasn't fully explored how task factors influence accurate detection. Even further lacking are the existing training interventions that still have users falling victim to up to 90% of phishing emails following training. The present studies examined how task factors (e.g., email load, phishing prevalence) and a new form of intervention, rather than training, influence email performance. In four experiments, participants classified emails as either legitimate or not legitimate and reported on a …
Tuning Dynamics, Sterics, And Ion Conductivities In Reticular Materials, Demetrius Vazquez-Molina
Tuning Dynamics, Sterics, And Ion Conductivities In Reticular Materials, Demetrius Vazquez-Molina
Electronic Theses and Dissertations, 2020-2023
The goal of this thesis is to synthesize libraries of organic building blocks with systematic functionalizations for tuning dynamics and steric traits in crystalline frameworks. Chapter 1 will introduce the materials being studied, their targeted applications, and a brief outline of each chapter will also be included. Chapters 2 explores the impact of mechanical processing in Covalent Organic Frameworks (COFs) from the point of view of crystallographic effects and pressure induced preferred orientation. This chapter also studies solid-state ionic conduction for Li ions in crystallographically aligned COFs studied by solid-state NMR and Electrochemical Impedance Spectroscopy (EIS), we observed fast ionic …
Development Of 3d Porous Chitosan-Based Platform For In Vitro Culture, Kailei Xu
Development Of 3d Porous Chitosan-Based Platform For In Vitro Culture, Kailei Xu
Electronic Theses and Dissertations, 2020-2023
Three-dimensional (3D) cell cultures have been widely used in biological research since two-dimensional (2D) cultures have many limitations including alteration of cell morphology, metabolic pathways and gene expression. Therefore, the application of 2D cell cultures in pharmaceutical companies for drug screening causes reproducibility issues in animal studies, which strongly influences the efficiency of drug development. The aim of my studies is to develop 3D cell culture models to better mimic the extracellular matrix (ECM) in tumor microenvironment, not only for deeper understanding of interaction between cells and ECM, but also for the application in drug screening. Three different compositions of …
Pfsa Newsletter, Volume 04, Happy New Year!!, January 2020, Pfsa
Pfsa Newsletter, Volume 04, Happy New Year!!, January 2020, Pfsa
Newsletters
Happy 2020 and welcome back to UCF. This semester we are committed to continuing partnerships, organizing community events and meaningful programs, as well as, helping to create action related to LGBTQ+ community needs at UCF. Within the next few months, we will be meeting as a membership to look toward the spring semester. I hope you had a restful break and that you found ways to re-energize for all that is to come.
Removal Of Chemicals Of Emerging Concern And Mass Transfer Modeling In A Nanofiltration Membrane Process, Carlyn Higgins
Removal Of Chemicals Of Emerging Concern And Mass Transfer Modeling In A Nanofiltration Membrane Process, Carlyn Higgins
Electronic Theses and Dissertations, 2020-2023
An investigation of 1,4-dioxane and enantiomeric ibuprofen mass transfer in a nanofiltration (NF) membrane process has been completed. Pilot-scale experiments using a 267 gallon per minute (gpm) split-feed, center-port NF process treating pH 6.5 groundwater revealed a consistent 12 percent removal of 1,4-dioxane despite the variable feed concentration (180 nanograms per liter (ng/L) to 38,400 ng/L) when the water flux and temperature were held constant. Bench-scale, flat-sheet NF membrane experiments treating pH 4.0 synthetic water displayed a 34.5 to 49.5 percent removal of racemic ibuprofen. Removal values were dependent on feedwater concentration (1 to 1,500 microgram per liter (µg/L)), pH, …
Symmetry And High Harmonic Spectroscopy In Solids, Shima Gholam Mirzaeimoghadar
Symmetry And High Harmonic Spectroscopy In Solids, Shima Gholam Mirzaeimoghadar
Electronic Theses and Dissertations, 2020-2023
High harmonic generation (HHG) by intense femtosecond laser pulses has, over the last three decades, provided new coherent sources of extreme ultraviolet and soft x-ray light and enabled the field of attosecond science. Furthermore, as properties of the target are encoded in the harmonic emission, high harmonic spectroscopy has allowed extraction of molecular structure and dynamics from the spectra and polarization states of harmonics generated from gas-phase molecules. HHG from solids, discovered in 2011, now promises to offer similar benefits to condensed matter physics. In this dissertation, I describe progress on two fronts: extending attosecond techniques to generate new high …
Improving Air Pollution Exposure Estimation Using Cell Phone Location Data And Low-Cost Sensors, Xiaonan Yu
Improving Air Pollution Exposure Estimation Using Cell Phone Location Data And Low-Cost Sensors, Xiaonan Yu
Electronic Theses and Dissertations, 2020-2023
Human exposure estimation to air pollution plays an important role in epidemiological studies which are designed to reveal correlations between human exposures to certain air pollutants and certain diseases, such as asthma, cardiovascular disease and reproductive diseases. Traditionally, when people's mobile data is hard to get, home location is used to estimate people's exposures assuming that people stay at home all the time. Whereas, people move and it is more accurate to estimate people's exposures including people's mobility. In our study, we showcased two methods to obtain people's mobile data: Google Maps location history (GMLH) data and Call Detailed Record …
Metatheatre And Critical Race Theory: A Combination For Compelling Storytelling And Effective Changemaking, Andrew Coleburn
Metatheatre And Critical Race Theory: A Combination For Compelling Storytelling And Effective Changemaking, Andrew Coleburn
Electronic Theses and Dissertations, 2020-2023
Vaclav Havel once said that "[t]heatre is always a sensitive seismograph of an era, perhaps the most sensitive one there is; it's a sponge that quickly soaks up important ingredients in the atmosphere around it." One of the more important "ingredients" in our cultural atmosphere in modern America is the issue of identity. In his book on metatheatre, Richard Hornby posits that theatre is "a kind of identity laboratory, in which social roles can be examined vicariously." In this thesis, I examine Hornby's theory of the five different modes of metatheatre, critique each, and argue for the addition of a …
Podcasts As Informal Learning Tools: Graduate Students' Experiences With Podcasts As Self-Directed Learning, Michael Heller
Podcasts As Informal Learning Tools: Graduate Students' Experiences With Podcasts As Self-Directed Learning, Michael Heller
Electronic Theses and Dissertations, 2020-2023
The purpose of this phenomenological inquiry was to explore how graduate students in education programs at a large, public university in the Southeastern United States perceived and interpreted their informal learning experiences from listening to podcasts. Guided by a conceptual framework comprised of Andragogy, Uses and Gratifications, and King's Reflective Action Research Model, this qualitative investigation, conducted during the COVID-19 lockdown of 2020, utilized in-depth Zoom interviews with 15 graduate students in education programs. The participants' constructed personal narratives revealed four distinguishable educative benefits of podcast listenership: Educative Engagement and Enhancement, Self-Directed Convenience, Parasocial Perspective Gathering, and Educative Growth Through …
Volume Xxviii (2020)
The Marjorie Kinnan Rawlings Journal of Florida Literature
No abstract provided.
Shane Hinton's "Pinkies" As An Allegory Of Climate Change And Ecological Paranoia, Christopher Nank
Shane Hinton's "Pinkies" As An Allegory Of Climate Change And Ecological Paranoia, Christopher Nank
The Marjorie Kinnan Rawlings Journal of Florida Literature
No abstract provided.
Because Of A Letter…, Joan Sage
Because Of A Letter…, Joan Sage
The Marjorie Kinnan Rawlings Journal of Florida Literature
No abstract provided.
Experiences Of Loss And Growth: A Phenomenological Inquiry Of Mass Shooting Survivors And Their Family Or Family-Of-Choice Members, Amanda Dilorenzo
Experiences Of Loss And Growth: A Phenomenological Inquiry Of Mass Shooting Survivors And Their Family Or Family-Of-Choice Members, Amanda Dilorenzo
Electronic Theses and Dissertations, 2020-2023
This study explores the lived experiences of survivors of mass shootings and their family members' experiences of relational loss and growth. There is limited research on mass shooting survivors, with most of it focusing on post-traumatic stress disorder and other diagnosable mental health concerns. Until this study, the voices of survivors and their family members were absent from literature. The field of grief and traumatic loss typically refers to experiences related to the death of a loved one. However, this study seeks to expand the understanding on how exposure to a traumatic experience accompanies intangible, relational, and disenfranchised grief for …
2020 Icrcc Proceedings Table Of Contents, Conference Organizers
2020 Icrcc Proceedings Table Of Contents, Conference Organizers
International Crisis and Risk Communication Conference
These proceedings are a representative sample of the presentations given by professional practitioners and academic scholars at the 2020 International Crisis and Risk Communication Conference (ICRCC) held March 9-11, 2020. The ICRCC is an annual event that takes place the second week in March in beautiful sunny Orlando, Florida. The conference hosts are faculty and staff from the Nicholson School of Communication and Media. The goal of the ICRCC is to bring together prominent professional practitioners and academic scholars that work directly with crisis and risk communication on a daily basis. We define crisis and risk broadly to include, for …
Using The Idea Model To Analyze Messages Used In Hepatitis B Vaccination In Uganda, Ann Mugunga, Angella Napakol
Using The Idea Model To Analyze Messages Used In Hepatitis B Vaccination In Uganda, Ann Mugunga, Angella Napakol
International Crisis and Risk Communication Conference
This research analyzed the messages that both the Government of Uganda and the National organization of persons living with Hepatitis B use to communicate to at-risk populations in order to enable them take up the vaccination against Hepatitis B. Content analysis was carried out on two electronic fliers circulated from the ministry of health’s program in charge of Hepatitis control and treatment, and one hard copy flier from the National organization of persons living with Hepatitis B. The study assessed how the publications made use of the IDEA concepts of internalization, distribution, explanation and action in getting the audience to …