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Heat Transfer Characterization Of Carbon Dioxide In Micro Impinging Jet(S) Near Critical Conditions, Stephen Adeoye Jan 2022

Heat Transfer Characterization Of Carbon Dioxide In Micro Impinging Jet(S) Near Critical Conditions, Stephen Adeoye

Electronic Theses and Dissertations, 2020-2023

The continuous growth and demand of increased operating performances of electronics has brought about an increase in the chip power density posing threat to the thermal management of these devices. Although numerous thermal solutions ranging from passive to active cooling together with a variety of working fluids have been adopted, however, the question whether these available cooling methods could meet up with the ever-growing need for increased operating performances is a concerning one. Jet impingement cooling has been effectively used in many industrial applications due to its high heat transfer capability. The limited study at the micro scale suggests that …

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Attenuation Of Excess Tnfα Release In Crohn's Disease By Silencing Of Irhoms 1/2 And The Restoration Of Tgfβ-Mediated Immunosuppression Through The Modulation Of Tace Trafficking, Taylor Louis Jan 2022

Attenuation Of Excess Tnfα Release In Crohn's Disease By Silencing Of Irhoms 1/2 And The Restoration Of Tgfβ-Mediated Immunosuppression Through The Modulation Of Tace Trafficking, Taylor Louis

Electronic Theses and Dissertations, 2020-2023

Although treatment of Crohn's disease (CD) with TNFa monoclonal antibodies is beneficial, many patients stop responding over time and become at risk of acquiring infections. This study investigated an alternative approach to attenuate the release of excess TNFα by silencing iRHOMs 1/2 with the intention of restoring TGFβ-mediated Immunosuppression through Mitigation of TNFα converting enzyme (TACE) Trafficking. TACE, a transmembrane metalloprotease involved in signaling of receptors/cytokines/growth factors/adhesion proteins, is upregulated in CD, resulting in a marked increase of membranous TNFα cleavage and inflammation. Initially, we measured TGFβRII shedding in plasma from CD patients and healthy controls (N=40 per group). We …

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Applications For Machine Learning On Readily Available Data From Virtual Reality Training Experiences, Alec Moore Jan 2022

Applications For Machine Learning On Readily Available Data From Virtual Reality Training Experiences, Alec Moore

Electronic Theses and Dissertations, 2020-2023

The purpose of the research presented in this dissertation is to improve virtual reality (VR) training systems by enhancing their understanding of users. While the field of intelligent tutoring systems (ITS) has seen value in this approach, much research into making use of biometrics to improve user understanding and subsequently training, relies on specialized hardware. Through the presented research, I show that with machine learning (ML), the VR system itself can serve as that specialized hardware for VR training systems. I begin by discussing my explorations into using an ecologically valid, specialized training simulation as a testbed to predict knowledge …

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An Anthropological Study Of The Effects Of The Covid-19 Pandemic On Drug Treatment In The United States, Abigail Shepherd Jan 2022

An Anthropological Study Of The Effects Of The Covid-19 Pandemic On Drug Treatment In The United States, Abigail Shepherd

Electronic Theses and Dissertations, 2020-2023

This thesis examined the extent to which the COVID-19 pandemic has affected the structure of drug treatment in the United States and how the effects have influenced the experience of undergoing and providing services in a variety of contexts. The COVID-19 pandemic emerged amid an opioid epidemic, which has taken the lives of over 564,000 Americans since the late 1990s. With overdose deaths increasing since the onset of the pandemic and government agencies responding with policy changes, recent research in the social sciences and on drug treatment services has necessarily shifted its focus to the effects of the pandemic on …

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Cholera Transmission Dynamic Model With Environmental Impacts Of Plankton Reservoirs, Sweety Sarker Jan 2022

Cholera Transmission Dynamic Model With Environmental Impacts Of Plankton Reservoirs, Sweety Sarker

Electronic Theses and Dissertations, 2020-2023

Cholera is an acute disease that is a global threat to the world and can kill people within a few hours if left untreated. In the last 200 years, seven pandemics occurred, and, in some countries, it remains endemic. The World Health Organization (WHO) declared a global initiative to prevent cholera by 2030. Cholera dynamics are contributed by several environmental factors such as salinity level of water, water temperature, presence of plankton especially zooplankton such as cladocerans, rotifers, copepods, etc. Vibrio cholerae (V. cholerae) bacterium is the main reason behind the cholera disease and the growth of V. cholerae depends …

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Numerical Study Of Flow Of Supercritical Carbon Dioxide Inside Microchannels With Heat Transfer, Uday Manda Jan 2022

Numerical Study Of Flow Of Supercritical Carbon Dioxide Inside Microchannels With Heat Transfer, Uday Manda

Electronic Theses and Dissertations, 2020-2023

Heat transfer inside microscale geometries is a complex and a challenging phenomenon. As supercritical fluids display large variations in their properties in the vicinity of the critical point, their usage could be more beneficial than traditional coolants. This numerical study, in two parts, primarily focuses on the physics that drives the enhanced heat transfer characteristics of carbon dioxide (CO2) near its critical state and in its supercritical state. In the first part of the study, the flow of supercritical Carbon Dioxide (sCO2) over a heated surface inside a microchannel of hydraulic diameter 0.3 mm was studied using three-dimensional computational fluid …

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Atmospheric Retrieval: Bayesian Methods, Machine Learning, And Application To Exoplanets, Michael Himes Jan 2022

Atmospheric Retrieval: Bayesian Methods, Machine Learning, And Application To Exoplanets, Michael Himes

Electronic Theses and Dissertations, 2020-2023

Atmospheric retrieval is the inverse modeling method where atmospheric properties are constrained based on measured spectra. Due to the low signal-to-noise ratios of exoplanet observations, exoplanetary retrieval codes pair a radiative transfer (RT) simulator with a Bayesian statistical framework in order to characterize the distribution of atmospheric parameters that could explain the observations (the posterior distribution). This requires on the order of 106 RT model evaluations, which requires hours to days of compute time depending on model complexity. In this work, I investigate atmospheric retrieval methods and apply them to observations of hot Jupiters. Chapter 2 presents a set of …

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Bodies Of Clay, Noor Ur Rahman Jan 2022

Bodies Of Clay, Noor Ur Rahman

Electronic Theses and Dissertations, 2020-2023

A little boy named Armaghaan grows in a fictional tribal village Kashmala along the border of Afghanistan and Pakistan during the seventies and eighties. His father Roshaan Khan and mother Shandana are living together in a conflicted marriage. Their desires and needs are at odds with each other, and their children suffer at the cost. Armaghaan observes his parents and elders, explores the physical environment of Kashmala and tries to grapple with his circumstances. The story of Armaghaan's childhood and adolescence plays in the backdrop of the USSR-Afghan War. Though the war itself doesn't become the focus of the narrative, …

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Sensitivity Of Combustion Liner Contour To Sand Ingestion Clogging, Nelson Padilla Jan 2022

Sensitivity Of Combustion Liner Contour To Sand Ingestion Clogging, Nelson Padilla

Electronic Theses and Dissertations, 2020-2023

This currently presented work is an evaluation of the characteristics of different cooling hole geometries to particulate ingestion clogging. Experimentation was conducted using a premixed bluff body flame combustor facility to generate high temperature combustor flow conditions. Sand ingestion along the cooling path of the combustion liner was reproduced using an air-assisted seeder providing consistent sand ingestion. Mass flow rate of cooling air was controlled using a sonic orifice downstream of a pressure regulator so that the mass flow rate of the air and sand mixture is independent of the clogging state. Pressure data upstream of a small section of …

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Homicide Patterns In Urban Places:A Geospatial Analysis Of Homicide In Baltimore, M.D., Kayla Toohy Jan 2022

Homicide Patterns In Urban Places:A Geospatial Analysis Of Homicide In Baltimore, M.D., Kayla Toohy

Electronic Theses and Dissertations, 2020-2023

Extant criminological research examining research questions oriented on understanding the spatial distribution of violent crime instances, such as homicide, have often employed the theoretical foundations of both social disorganization theory and routine activities theory. Though there is much research using these theories independently and in conjunction with one another, few studies have integrated the theories in analyses of homicide at multiple levels of aggregation. The current study is conducted to analyze homicide incidents in Baltimore, Maryland from 2014 through 2018. The analysis conducted considers both social disorganization and routine activities theory variables to test the explanatory power of each theory …

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Design And Mechanical Characterization Of Functionally Graded Sandwich Beams Fabricated Via Additive Manufacturing, Timothy Grondin Jan 2022

Design And Mechanical Characterization Of Functionally Graded Sandwich Beams Fabricated Via Additive Manufacturing, Timothy Grondin

Electronic Theses and Dissertations, 2020-2023

Lightweight aerospace structures have been sought after since humans took flight in 1903, making major strides in NASA's pursuit of the moon with the development of sandwich panel composites. Sandwich structures typically consist of two stiff phases (i.e., face sheets) separated by a lightweight phase (i.e., core), which are stacked together through adhesive layers. Such a structural arrangement provides a high stiffness-to-weight ratio and is often used in applications where weight saving is critical. Functionally Graded Materials (FGMs), refer to multifunctional materials, which contain a spatial variation of composition and/or microstructure for the specific purpose of altering thermal and structural …

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Uncovering Ophelia: The Reclamation Of Women's Madness Through Feminist Disability Studies, Amy Crawford Jan 2022

Uncovering Ophelia: The Reclamation Of Women's Madness Through Feminist Disability Studies, Amy Crawford

Electronic Theses and Dissertations, 2020-2023

In his essay "The Philosophy of Composition," Edgar Allan Poe proclaims that "the death of a beautiful woman is unquestionably the most poetical topic in the world," and this sentiment remains curiously persistent within the literary world. Artists have looked towards their beautiful muses for centuries as a source of inspiration and introspection, and the faces that these muses wear were often swooning, longing, or even dead. Nineteenth-century British aesthetics solidified a gendered ideology that remains prevalent to this day; in particular, one subculture of Victorian aesthetics that emerged during this period was the Cult of Ophelia: a collection of …

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Team Virtuality And Psychological Safety: An Experiment, Moses Rivera Jan 2022

Team Virtuality And Psychological Safety: An Experiment, Moses Rivera

Electronic Theses and Dissertations, 2020-2023

Working from home as part of a virtual team has become the status quo for many workers due to the COVID-19 pandemic. Moreover, modern organizations require teams skilled at complex problem-solving, innovation, and adaptability. Psychological safety enhances these skills, by means of fostering an environment in which team members can fully engage and learn. Given the theoretical possibility that team virtuality may dampen the development of team psychological safety, the present study empirically investigated relationship between these two constructs. A hypothesized model was tested, in which team virtuality has an indirect effect on team psychological safety, via intrateam perceived other-to-self …

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Plasmonic Sensor Based Detection Of Dopamine, Sang Lee Jan 2022

Plasmonic Sensor Based Detection Of Dopamine, Sang Lee

Electronic Theses and Dissertations, 2020-2023

With a rapidly ageing population, neurological diseases are becoming increasingly relevant in the design of public health policies and strategies in western societies. In the last decades, biochemical research has consistently shown the critical role that neurotransmitters and their associated metabolites play as biomarkers in tracking and diagnosis of different brain disorders and cancers. In particular, dopamine, an organic electrochemical neurotransmitter, has been shown to be paramount for the proper functioning of the neural system. Dopamine's dysfunction, has been shown to underlie the pathogenesis in several neurological disorders such as Parkinson's disease, depression, chronic schizophrenia and psychosis. Unfortunately, currently available …

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Analytical Study Of Deep Learning Methods For Road Condition Assessment, Elham Eslami Jan 2022

Analytical Study Of Deep Learning Methods For Road Condition Assessment, Elham Eslami

Electronic Theses and Dissertations, 2020-2023

Automated pavement distress recognition is a key step in smart infrastructure assessment. Advances in deep learning and computer vision have improved the automated recognition of pavement distresses in road surface images. This task, however, remains challenging due to the high variations in road objects and pavement types, variety of lighting condition, low contrast, and background noises in pavement images. In this dissertation, we propose novel deep learning algorithms for image-based road condition assessment to tackle current challenges in detection, classification and segmentation of pavement images. Motivated by the need for classifying a wide range of objects in road monitoring, this …

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Polymer Derived Ceramic For Lithium-Ion Storage, And Electrospun Polyelectrolyte Fiber For Heavy Metal Ions Removal, Zeyang Zhang Jan 2022

Polymer Derived Ceramic For Lithium-Ion Storage, And Electrospun Polyelectrolyte Fiber For Heavy Metal Ions Removal, Zeyang Zhang

Electronic Theses and Dissertations, 2020-2023

This dissertation includes two major projects. The first project investigated the great potential of polymer-derived ceramics (PDCs) as lithium-ion battery anode materials with good cycling stability and large capacity. SiCNO ceramic nanoparticles were produced by pyrolysis of polysilazane nanoparticles synthesized via an oil-in-oil emulsion crosslinking. The SiCNO nanoparticles had an average particle size of around 9 nm and contained graphitic carbon, Si3N4, and SiO2 domains. The electrochemical behavior of SiCNO nanoparticles anode was investigated to evaluate the Li-ion storage performance and understand its mechanism of Li-ion storage. The lithiation of SiCNO was observed at ~0.385 V versus Li/Li+. The anode …

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Characterization Of A Malachite Green Dna Aptamer And Development Of Malachite Green Dna Aptamer Sensor, Martin O'Steen Jan 2022

Characterization Of A Malachite Green Dna Aptamer And Development Of Malachite Green Dna Aptamer Sensor, Martin O'Steen

Electronic Theses and Dissertations, 2020-2023

Hydrogels have been extensively studied for use in applications such as tissue engineering, drug delivery systems, wound dressing, actuators, valves, and sensors in Micromechanical Systems (MEMS), among others. Thermo-responsive hydrogels in particular pose various advantages such as their capability to respond to an external stimulus and reverse the response when the stimulus is removed and the ability to imbibe a significant amount of solvent and increase their volume by over 1000%. Extensive research has been conducted to tune and improve hydrogel's rate and degree of swelling and mechanical properties. Previous work showed that when synthetic clay (Laponite) is cross-linked with …

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Inclusive Writing, Kairos, And Technical Communication: Defining Our Modern Age., Ramara Reisch Jan 2022

Inclusive Writing, Kairos, And Technical Communication: Defining Our Modern Age., Ramara Reisch

Electronic Theses and Dissertations, 2020-2023

A reoccurring topic in the TPC (technical/ professional communication) field has been the exclusion and marginalization of some audience members, especially those who are African American/ Black, Asian, Hispanic or Latino, LGBTQIA, and those with physical or mental disabilities. Throughout this thesis, I make connections between what has happened in the past and how it has contributed to the kairos of the TPC social justice turn. I explore the term "kairos" which is the timing and space in which something occurs and, depending on someone's delivery, they can create a persuasive and opportunist moment. The subject of including audiences into …

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An Econometric Analysis Of Domestic Aviation In The Us, Sudipta Dey Tirtha Jan 2022

An Econometric Analysis Of Domestic Aviation In The Us, Sudipta Dey Tirtha

Electronic Theses and Dissertations, 2020-2023

In this dissertation, we examine two dimensions of domestic aviation - demand and delay - that directly influence economic impact of the sector. We conduct a comprehensive analysis of airline demand employing airline data compiled by Bureau of Transportation Statistics. The demand analysis is conducted in three steps. First, we propose a novel modeling approach for modeling airline demand evolution over time. Specifically, we develop a joint panel group generalized ordered probit (GGOP) model system for modeling air passenger arrivals and departures in a discretized framework that subsumes the traditional linear regression approach. Further, we consider the influence of observed …

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On Liquid Rotating Detonation Rocket Engines Characterization And Performance, Vidhan Malik Jan 2022

On Liquid Rotating Detonation Rocket Engines Characterization And Performance, Vidhan Malik

Electronic Theses and Dissertations, 2020-2023

The current research investigates a next-generation method of combustion called detonations for propulsive applications which has support from the Combustion Services Branch at the Air Force Research Laboratory (AFRL) of the Rocket Propulsion Division. The overall initiative seeks to explore the viability of detonation-based systems to augment or replace current rocket propulsion methods in the coming five years. The present work progresses this vision by providing proof of a liquid RP-2 based Rotating Detonation Rocket Engine (RDRE) as well as the fundamentals associated with the physics involved to further the understanding of the phenomenon and its potential uses. Phase one …

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Decentralized Digital Fabrication Of Flexible Micro/Nano Devices Using A Laserjet Printer, Arshya Bamshad Jan 2022

Decentralized Digital Fabrication Of Flexible Micro/Nano Devices Using A Laserjet Printer, Arshya Bamshad

Electronic Theses and Dissertations, 2020-2023

The fabrication of traditional micro/nano devices requires access to cleanrooms, complex and expensive tools, and highly-skilled labor. A facile and digital do-it-yourself (DIY) technique for the fabrication of low-cost devices on flexible substrates (paper, cloth, and plastic films) is presented in this work. A set of office-grade equipment (i.e., laserjet printer, thermal laminator, computer-aided paper cutter), and commercially available supplies (i.e., baking wax paper, furniture restoration metal-leaf) are utilized. The presented technology enables community-embedded production by removing a high technological barrier. The validity of the proposed technology was proved by designing three levels of experiments, i.e., patterns, devices, and systems. …

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Exploring The Response To Covid-19 In Puerto Rico, Richard Colon Jan 2022

Exploring The Response To Covid-19 In Puerto Rico, Richard Colon

Electronic Theses and Dissertations, 2020-2023

In recent years Puerto Rico has faced a series of unfavorable events including financial turmoil, massive population loss, earthquakes, and droughts. These events had significantly impacted its resources and capacity to confront a major public health crisis. As such, Puerto Rico was expected to poorly manage the ongoing pandemic. Despite this, nearly all data surrounding the COVID-19 pandemic in Puerto Rico has indicated the contrary. The purpose of this study was to explore and understand the COVID-19 response in Puerto Rico. The Conservation of Resources theory guided the analysis of resource consumption and management of the Puerto Rican government and …

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A Unified Tool For Adaptive Collocation Techniques Applied To Solving Optimal Control Problems, Bethany Kelly Jan 2022

A Unified Tool For Adaptive Collocation Techniques Applied To Solving Optimal Control Problems, Bethany Kelly

Electronic Theses and Dissertations, 2020-2023

In this work, a user-friendly MATLAB tool is introduced to solve nonlinear optimal control problems by applying collocation techniques using Coupled Radial Basis Functions (CRBFs). CRBFs are a new class of Radial Basis Functions combined with a conical spline r^5, which provides the advantage of insensitivity to the shape parameter while maintaining accuracy and robustness. To solve optimal control problems, software tools are often employed to implement numerical methods and apply advanced techniques to solving differential equations. Although several commercial software tools exist for solving optimal control problems, such as ICLOCS2, GPOPS, and DIDO, there are no options available that …

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The Breakup Of Rp-2 Liquid Fuel Droplets In A Detonation Field, Daniel Dyson Jan 2022

The Breakup Of Rp-2 Liquid Fuel Droplets In A Detonation Field, Daniel Dyson

Electronic Theses and Dissertations, 2020-2023

Experimentally obtained droplet breakup patterns are presented for RP-2 liquid fuel droplets in the environment behind a detonation wave. To the best of our knowledge, this data is the first of its kind to examine the fundamental interactions between detonation waves and an individual fuel droplet. The experiments presented here are expected to support the ongoing effort of creating accurate models of droplet breakup in a variety of environments, which in turn will lead to enhanced predictions of rotating detonation engine performance, improved safety considerations for facilities operating in hazardous conditions, and new knowledge in energetics, hypersonics, and explosion dynamics …

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The Scoop, Vol. 8 Issue 10, January 2022, Health Sciences Library Jan 2022

The Scoop, Vol. 8 Issue 10, January 2022, Health Sciences Library

Volume 8

Latest news and updates from the Health Sciences Library in our monthly newsletter for January 2022.

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Diversity Speaker Series - Talk Sexy To Me: How Gender Influences Conflict And Negotiation Processes And Outcomes And What You Can Do To Overcome Disadvantages - Flyer, Academic Affairs Diversity Taskforce Jan 2022

Diversity Speaker Series - Talk Sexy To Me: How Gender Influences Conflict And Negotiation Processes And Outcomes And What You Can Do To Overcome Disadvantages - Flyer, Academic Affairs Diversity Taskforce

Academic Affairs Diversity Taskforce

Flyer advertising the Academic Affairs Diversity Speaker Series presented Talk Sexy to Me: How Gender Influences Conflict and Negotiation Processes and Outcomes AND What You Can Do To Overcome Disadvantages with Dr. Amanda Main on September 16, 2022.

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The Tele-Reference Model: Adopting Virtual Tools To Enhance Reference Services During Covid-19 And Beyond, Sandy Avila, Sarah A. Norris, Rebecca M. Murphey, Min Tong, Richard Harrison Jan 2022

The Tele-Reference Model: Adopting Virtual Tools To Enhance Reference Services During Covid-19 And Beyond, Sandy Avila, Sarah A. Norris, Rebecca M. Murphey, Min Tong, Richard Harrison

Faculty Scholarship and Creative Works

At the University of Central Florida Libraries, a new alternative to traditional reference service was adopted during the COVID-19 pandemic as a remote solution for safely staffing the Research and Information Desk (RAID) at the John C. Hitt Library. Due to the challenges of a partial library reopening at the height of COVID-19 variant infection rates in Florida, a safe alternative to physically staffing RAID was conceived and coined “Tele-Reference.” Utilizing a Zoom institutional license and readily available work equipment with audio and video capabilities, the Tele-Reference service model was developed by our research and information services librarians. The implementation, …

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The One Size Does Not Fit All Approach: Case Studies In Modeling Embedded Librarianship, Rachel L. Edford, Sandy Avila Jan 2022

The One Size Does Not Fit All Approach: Case Studies In Modeling Embedded Librarianship, Rachel L. Edford, Sandy Avila

Faculty Scholarship and Creative Works

The pandemic and resulting shift to remote work stressed the importance of distance library services. As librarians explored different modes of engagement, embedded librarianship became increasingly important but also more complicated than before. While there is a wealth of literature on embedded librarianship, few authors agree on how to define it or discuss its specific challenges during the pandemic. This paper will present the experiences of two academic librarians working in different departments at the same institution, informed by the literature; the authors will highlight the complexity of embedded librarianship during this unique time while addressing challenges and offering recommendations.

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Covid, Inequalities And Health: A Sociological Analysis About The Resilience Found In Unique Student Life Experiences, Sarah Da Silva Jan 2022

Covid, Inequalities And Health: A Sociological Analysis About The Resilience Found In Unique Student Life Experiences, Sarah Da Silva

Electronic Theses and Dissertations, 2020-2023

This study demonstrates how adversity during the covid pandemic has impacted the lives of diverse college students. Specifically, this study analyzes students' perspectives on how they respond through resilience to daily academic, financial, and social stressors impacting their health during the pandemic. For this study, the research questions are: 1) what themes and forms of coping emerge among marginalized racially, ethnically diverse U.S. college students about their mental health and daily life experiences exacerbated by the covid pandemic? 2) And to what do experiences with stressors in combination with the covid pandemic reveal about the mental health of marginalized groups …

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Broadband Investigation Of The Pyrolysis Of Propane Using A Mir Optical Parametric Oscillator, Robert Greene Jan 2022

Broadband Investigation Of The Pyrolysis Of Propane Using A Mir Optical Parametric Oscillator, Robert Greene

Electronic Theses and Dissertations, 2020-2023

The chemistry of propane continues to play a pivotal role in today's power production technologies. As reliance on natural gas expands as greener cleaner fuels are sought throughout the world, especially as countries are attempting to transition away from traditional coal and crude-oil fired plants towards solar, wind, and hydro-electric sources. Natural gas, often seen as a bridge fuel between these two competing ends, has been in the recent past and for the foreseeable future will continue to play an important role in the energy sector. Among the components of natural gas, propane plays a key role in the chemistry …

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