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Full-Text Articles in Entire DC Network
Numerical Study Of Flow Of Supercritical Carbon Dioxide Inside Microchannels With Heat Transfer, Uday Manda
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 …
Atmospheric Retrieval: Bayesian Methods, Machine Learning, And Application To Exoplanets, Michael Himes
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 …
Bodies Of Clay, Noor Ur Rahman
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, …
Sensitivity Of Combustion Liner Contour To Sand Ingestion Clogging, Nelson Padilla
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 …
Homicide Patterns In Urban Places:A Geospatial Analysis Of Homicide In Baltimore, M.D., Kayla Toohy
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 …
Design And Mechanical Characterization Of Functionally Graded Sandwich Beams Fabricated Via Additive Manufacturing, Timothy Grondin
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 …
Uncovering Ophelia: The Reclamation Of Women's Madness Through Feminist Disability Studies, Amy Crawford
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 …
Team Virtuality And Psychological Safety: An Experiment, Moses Rivera
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 …
Plasmonic Sensor Based Detection Of Dopamine, Sang Lee
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 …
Analytical Study Of Deep Learning Methods For Road Condition Assessment, Elham Eslami
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 …
Polymer Derived Ceramic For Lithium-Ion Storage, And Electrospun Polyelectrolyte Fiber For Heavy Metal Ions Removal, Zeyang Zhang
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 …
Characterization Of A Malachite Green Dna Aptamer And Development Of Malachite Green Dna Aptamer Sensor, Martin O'Steen
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 …
Inclusive Writing, Kairos, And Technical Communication: Defining Our Modern Age., Ramara Reisch
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 …
An Econometric Analysis Of Domestic Aviation In The Us, Sudipta Dey Tirtha
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 …
On Liquid Rotating Detonation Rocket Engines Characterization And Performance, Vidhan Malik
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 …
Decentralized Digital Fabrication Of Flexible Micro/Nano Devices Using A Laserjet Printer, Arshya Bamshad
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. …
Exploring The Response To Covid-19 In Puerto Rico, Richard Colon
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 …
A Unified Tool For Adaptive Collocation Techniques Applied To Solving Optimal Control Problems, Bethany Kelly
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 …
The Breakup Of Rp-2 Liquid Fuel Droplets In A Detonation Field, Daniel Dyson
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 …
I-Bid Handoff Tool, Francisco Guido-Sanz
I-Bid Handoff Tool, Francisco Guido-Sanz
Nursing Handouts, Tools, and Other Documents
No abstract provided.
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
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.
Covid, Inequalities And Health: A Sociological Analysis About The Resilience Found In Unique Student Life Experiences, Sarah Da Silva
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 …
Broadband Investigation Of The Pyrolysis Of Propane Using A Mir Optical Parametric Oscillator, Robert Greene
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 …
Un-Portalable! An Animated Exploration In Boundaries And Relational Design, Ira Klages
Un-Portalable! An Animated Exploration In Boundaries And Relational Design, Ira Klages
Electronic Theses and Dissertations, 2020-2023
Un-Portalable! is an animated multimedia short film about two friends who become fused together after using a faulty teleporter. They attempt to conceal their deformity while simultaneously navigating a social situation with one of their friends. The main focus in the film is the concept that boundaries tend to become clearer as they begin to break. This conceptual focus merges into the visual theory of the film in which highly expressive character design and hybrid media utilization are driven by relational and narrative design choices. This film serves as a condensed pilot and proof of concept for a larger prospective …
Deadly Combinations: Factors That Are Associated With Simultaneous And Concurrent Polysubstance Use, Laura Lightfoot
Deadly Combinations: Factors That Are Associated With Simultaneous And Concurrent Polysubstance Use, Laura Lightfoot
Electronic Theses and Dissertations, 2020-2023
Mortality reports show that most overdose deaths include more than one substance. In addition, there is a gap in the literature that discusses risk factors for polysubstance use. The objective of this study was to explore what factors relate to the likelihood of engaging in polysubstance use, defined as using more than one substance. Specifically, the goal was to evaluate predictors of simultaneous (i.e., the use of alcohol and another substance at the same time in the past six months) polysubstance use and concurrent (i.e., the use of any two substances in the past six months) polysubstance use, vs. no …
The Universal Story: Coming-Of-Age In Contemporary Animation, Christina Christie
The Universal Story: Coming-Of-Age In Contemporary Animation, Christina Christie
Electronic Theses and Dissertations, 2020-2023
Cycles is a 3D animated short film about a father who struggles to keep up with his daughter as she races through life. Whereas most coming-of-age films focus solely on the journey of the adolescent, Cycles subverts the expectations of the genre by exploring the impact growing up has on both the parent and child in tandem. As a film, Cycles relies on the careful and deliberate use of tropes, informed character and environment design, and established cinematic devices to support the story's theme of accepting change. Though my personal experience inspired this film, it evolved into a contemporary and …
The Loyalty Of The Lords Of Albret: An Investigation Of The Gascon Rolls At The Outset Of The Hundred Years War, Jason Delaney
The Loyalty Of The Lords Of Albret: An Investigation Of The Gascon Rolls At The Outset Of The Hundred Years War, Jason Delaney
Electronic Theses and Dissertations, 2020-2023
This thesis will examine the juxtaposition of the duchy of Gascony's importance to the Plantagenet Crown with the difficulties administering the region and protecting it from French interference during the late-thirteenth and early-fourteenth centuries, resulting in the necessity of securing the loyalty of Gascon nobles for assistance. The lords of Albret were powerful allies under Edward I (1272-1307), and their defection to the French under his son, Edward II (1307-1327), put Plantagenet Gascony in a vulnerable position when the Hundred Years War began in 1337. Resecuring the loyalty of Albret – and other powerful Gascon lords – was crucial for …
Distracted Driving And Pedestrians' Effects On Headway At Signalized Intersections, Bassel Elgamal
Distracted Driving And Pedestrians' Effects On Headway At Signalized Intersections, Bassel Elgamal
Electronic Theses and Dissertations, 2020-2023
Distracted driving and pedestrians pose one of the most difficult challenges to ensuring a safe and efficient transportation system. Modern communications have delivered greater convenience. However, this has come at the cost of attention spans. Safety has been thoroughly explored in terms of distracted driving and pedestrians. However, impacts on traffic operations have received minimal research attention. Few studies provided a theoretical mechanism on how intersection operations can be affected but failed to quantify the real-life impacts on traffic operations. Furthermore, new Florida laws prohibit cellphone usage while driving but is allowed when the vehicle is stationary, which may result …
Evaluating Novel Combinations Of Polyamine Targeting Therapeutics In Pancreatic Ductal Adenocarcinoma, Sai Preethi Nakkina
Evaluating Novel Combinations Of Polyamine Targeting Therapeutics In Pancreatic Ductal Adenocarcinoma, Sai Preethi Nakkina
Electronic Theses and Dissertations, 2020-2023
Pancreatic cancer overall has a poor five-year survival rate of less than 8%. Well-tolerated regimens and immune cell infiltration to promote anti-cancer treatments are major challenges. Studies described herein leveraged testing different combinations/doses of polyamine targeting inhibitors to further understand the impact of targeting key polyamine pathway mediators in pancreatic ductal adenocarcinoma (PDAC). Placebo controls were compared to groups treated with difluoromethylornithine (DFMO, a polyamine biosynthesis inhibitor of ornithine decarboxylase), different polyamine transport inhibitors, and compound combinations in strategies for polyamine blockage therapy (PBT). Informatic analyses showed that the dysregulation of key polyamine pathway mediators are associated with poor patient …
Mathematical Model For Giraffe Population Dynamics, Huntir Bass
Mathematical Model For Giraffe Population Dynamics, Huntir Bass
Electronic Theses and Dissertations, 2020-2023
Since the 1980s the overall giraffe population has dropped at least 40% causing some researchers to label this rapid decline as the "Silent Extinction." Due to this plummet, understanding the behaviors of the giraffe population is absolutely necessary before they are on the brink of extinction. Through the usage of mathematical modeling methodologies, a general model is created to illustrate the relationship between juvenile and adult female giraffes through numerous interaction parameters. Variations on specific variables generate different simulations, which allows more biological accuracy. With each variation having an established coexistence equilibrium between the juvenile and adult female populations, the …