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Full-Text Articles in Entire DC Network
The Examination Of Factors That Influence Trust In A Multi-Agent Team Context, Cherrise Ficke
The Examination Of Factors That Influence Trust In A Multi-Agent Team Context, Cherrise Ficke
Theses and Dissertations
Current dyadic teams in the human-agent teams literature demonstrates that Propensity to Trust in Technology (PTT), previous experience with an agent, levels of autonomy (LOA), workload, and mission performance affect trust and mission performance to some capacity. However, the purpose of this study was to expand this line of research by examining how these factors influence trust and mission performance in a multi unmanned aerial vehicle (UAV) context. To investigate the relationship between these factors and trust, an archival study was conducted using data from a previously-conducted, multi-UAV study. The previous study utilized a within-subjects repeated measures design in which …
High-Functioning Virtual Team Members & Quality Of Work Life: A Mixed Methods Analysis Of Subgroups, Performance, And Standard Occupational Classification Factors, Kate Ashley Hill
High-Functioning Virtual Team Members & Quality Of Work Life: A Mixed Methods Analysis Of Subgroups, Performance, And Standard Occupational Classification Factors, Kate Ashley Hill
Theses and Dissertations
Historical events such as industrialization, the advent of computers, and the dawn of the internet have consistently impacted the employee workforce and created risks and opportunities for increased performance and quality of work life (QWL) (Guest, 2014; O’Halloran, 2015). Modern worldwide businesses are increasingly turning to virtual team members (VTMs) to create efficiencies, lower costs, and adapt to the changing implications of the COVID-19 and worker environment (Garro-Abarca, Palos-Sanchez, & Aguayo-Camacho, 2021). At this intersection between global change and altering work practices, the VTM faces changing societal views on QWL. Therefore, the individual VTM is the unit of analysis and …
Climb Performance Testing Of The Pa-28-180 Utilizing Saw-Tooth Method And Level Acceleration Method, Paige Elizabeth Christensen
Climb Performance Testing Of The Pa-28-180 Utilizing Saw-Tooth Method And Level Acceleration Method, Paige Elizabeth Christensen
Theses and Dissertations
This thesis details the test methods, data reduction methods, and flight data analysis conducted in the climb performance evaluation of the PA-28-180 “Piper Arrow.” The main objective of this thesis was to quantitatively compare the climb performance requirements detailed in the former regulation, CAR 3.85a to the current regulation, 14 CFR 23.2120, utilizing Saw-Tooth steady climb method conducted at various airspeeds. The report also evaluates the Level Acceleration method at reciprocating headings, and qualitatively assesses the usefulness of testing multiple headings on a general aviation aircraft at multiple altitudes. The Saw-Tooth Climb and Level Acceleration flights were conducted on January …
Biomimicry Of Natural Reef Hydrodynamics In An Artificial Spur And Groove Reef Formation, Emilee Alaine Wissmach
Biomimicry Of Natural Reef Hydrodynamics In An Artificial Spur And Groove Reef Formation, Emilee Alaine Wissmach
Theses and Dissertations
Coral reef populations have rapidly been declining in coastal waters worldwide. Losing these ecosystems results not only in a loss of habitat and biodiversity, but also a loss of wave attenuation and subsequent coastal protection. Ongoing projects seek to rehabilitate and/or replace destroyed reefs with artificial structures like reef balls and rip-rap, but none perform as well as a healthy, natural reef. This project created scale modules mimicking the reef-crest and spur-and-groove (SAG) zones commonly found in natural reefs and used these models to support new efforts in artificial reef design. The modular structure consists of three different components including: …
An Investigation Of Emotional Intelligence Among African American College Students Enrolled In A State College In Florida, Wayne Brown
Theses and Dissertations
Due to the small number of research studies that have explored emotional intelligence (EI) in African-American (AA) samples (i.e., twelve studies, with six involving college students), the first purpose of this study was to describe conceptual and empirical dimensions of EI within a sample of AA college students (Research Question 1). To date, only one EI measure has been developed for use with AA samples, the African American Emotional Intelligence Survey or AAEIS (Funderburk, 2007), so the second purpose was to further explore the validity and reliability of the AAEIS (Research Question 2). The third purpose was to explore the …
Disaster Resilience In Air Traffic Control: Recovery Of Airspace Activity At U.S. Primary Airports That Experience A Catastrophic Hurricane, Victoria Thorpe
Disaster Resilience In Air Traffic Control: Recovery Of Airspace Activity At U.S. Primary Airports That Experience A Catastrophic Hurricane, Victoria Thorpe
Theses and Dissertations
The purpose of this study was to investigate the relationship between U.S. airport characteristics, hurricane strength, and hurricane proximity and the time it takes airspace activity to recover to normal after experiencing a catastrophic hurricane. It determined the relative influence of five airport characteristics and two hurricane characteristics as predictors of time for airspace activity to recover to normal. The result is a predictive airport disaster resilience equation to estimate the expected airport recovery rate for a forecasted catastrophic hurricane. This supports expectation management for aviation practitioners. This is significant for air traffic controllers because post-hurricane airspace is unpredictable, demanding, …
Towards Privacy-Preserving Social Media Networks: Protecting The Facial Privacy Of Images Uploaded On Social Media, Ahsi Lo
Theses and Dissertations
Since the 2000s, social media has allowed individuals the ability to communicate online. As the popularity of social media increased, the sharing of information such as pictures increased as well. Recently, there have been privacy concerns about the information shared online such as cases where third parties were able to gain access to users’ information without being given explicit access through scraping or other means. When user images are scraped from social media, there is a risk that these individuals can be identified o✏ine. Bystanders, who may be captured in images also run this risk of identification. This research investigates …
Modeling Of Turbulent Flow In Pipe Systems With Compound Bends, Stella Smithe
Modeling Of Turbulent Flow In Pipe Systems With Compound Bends, Stella Smithe
Theses and Dissertations
A practical CFD k-epsilon realizable model is applied to four pipe systems with various 90° bend configurations to examine velocity profile evolution and total pressure losses within the pipe systems. The pipe systems compared are a configuration with a single 90° L-bend, as well as three additional pipe configurations composed of dual 90° bends, all with total length x/D=16.7. The dual bend configurations studied are: a 180° turning U-bend, a 0° total turning S-bend, and a dual 90° out-of-plane, compound C-bend. The CFD model was benchmarked against experimental data from a straight pipe and a pipe configuration with a single …
Rendezvous And Proximity Operations In Cis-Lunar Space, Khalid Jebari
Rendezvous And Proximity Operations In Cis-Lunar Space, Khalid Jebari
Theses and Dissertations
As interest in Moon exploration grows and efforts to establish an orbiting outpost intensify, accurate modeling of spacecraft dynamics in cis-lunar space is becoming increasingly important. Contrary to satellites in Low Earth Orbit (LEO) where it takes around 5 ms to communicate back and forth with a ground station, in the Moon’s orbit it can take up to 2.4 seconds to do so. This delay in communication can make the difference between a successful docking and a catastrophic collision for a remotely controlled satellite. Moreover, due to the unstable nature of trajectories in cis-lunar space, it is necessary to design …
Assessing The Effect Of Atmospheric Turbulence On Long-Range Face Recognition Accuracy, Muskan Jain
Assessing The Effect Of Atmospheric Turbulence On Long-Range Face Recognition Accuracy, Muskan Jain
Theses and Dissertations
Recent investigations have demonstrated that it might be challenging to identify faces in the images taken using a long-distance camera. A face seems blurry in these images because of the presence of atmospheric turbulence. To examine how atmospheric turbulence impacts face biometrics, we establish a simulated environment that exhibits different degrees of turbulence. We employed the Rytov Variance, which relies on the distance and refractive index, C2 n, to get various turbulence levels. We used the LRFID dataset to carry out the study, which is a collection of photos and videos taken in the field and in a controlled setting. …
Trajectory Energy Management For Ectol: Examination Of Battery Discharge Under Two Flight Profiles, Denner Campos Cunha
Trajectory Energy Management For Ectol: Examination Of Battery Discharge Under Two Flight Profiles, Denner Campos Cunha
Theses and Dissertations
The expanding industry of electric airplanes presents a significant regulatory challenge for aviation authorities worldwide. The first step towards achieving a precise Trajectory Energy Management (TEM) is to understand how the powertrain behaves during the operation. Therefore, this work examined the battery performance of an eCTOL, the Pipistrel Velis Electro, under two different prescribed flight profiles and take-off weights. Flight 1, a destination trip profile, was conducted with a gross weight of 1146 lbs and a constant power setting of 22 kW during the cruise segment, while Flight 2, a local training flight profile, was conducted with a gross weight …
Evaluation Of Human Mobility From Crowd-Sourced Cellular Data, Sasa Knezevic
Evaluation Of Human Mobility From Crowd-Sourced Cellular Data, Sasa Knezevic
Theses and Dissertations
Understanding patterns of human mobility plays a vital role in urban planning, traffic management, disease control, environmental impact evaluation, provisioning of services by both public and private enterprise and other areas of human activity. In this thesis, the human mobility patterns are studied using crowd sourced cellular data. The study characterizes human mobility through a meaningful set of mobility parameters. Each parameter is clearly defined, extracted from the available data, and described using statistical modeling tools. The parameters are evaluated at different time scales. It has been determined that despite its apparent randomness on the individual level, human mobility on …
Monte-Carlo Modeling Of Bidirectional Reflectance In Shallow Turbid Water, Tyler Anthony Rotkiske
Monte-Carlo Modeling Of Bidirectional Reflectance In Shallow Turbid Water, Tyler Anthony Rotkiske
Theses and Dissertations
The ability to model surface and bottom boundary layers using water column information in shallow waters is mathematically approached using a Monte-Carlo model. The hyperspectral Monte-Carlo model used in this research was previously developed and analytically validated. This mathematical model tracks photons in 3-dimensional space and includes the effects of small gravity waves on the water surface, the bottom reflectance, and constituents within the water column. This type of modeling uses a probabilistic approach and is the only method used to calculate shape factors and mean cosines in a water column and then verified using hyperspectral remote sensing reflectance measurements. …
Nonlinear Mathematical Transformations For Improved Image And Signal Recovery Using Artificial Neural Network, Haoran Chang
Nonlinear Mathematical Transformations For Improved Image And Signal Recovery Using Artificial Neural Network, Haoran Chang
Theses and Dissertations
Medical imaging plays a vital role in modern healthcare, enabling clinicians to diagnose and treat a range of conditions. However, image acquisition and processing can be challenging because they can often be hindered by motion blurring, leading to inaccurate results. To address that, this dissertation proposes a novel approach based on nonlinear mathematical transformations and artificial neural networks (ANN). The dissertation begins with an introduction to Nuclear Medicine and the problem of motion blur in image reconstruction. A background on Medical Imaging techniques, including the Radon transform and Image Reconstruction methods such as Filtered Back Projection and Iterative Reconstruction methods …
Towards Explainable Ai: Predicting Linear And Nonlinear Feature Relations Of Datasets, Nimmy Chhaganbhai Patel
Towards Explainable Ai: Predicting Linear And Nonlinear Feature Relations Of Datasets, Nimmy Chhaganbhai Patel
Theses and Dissertations
Artificial Intelligence (AI) makes critical decisions in an opaque way without explaining the reasoning behind them. Decision support systems are often built as black boxes. This has generated interest in Explainable AI (XAI), an area of research that explains AI algorithms and provides more insight into their internal decision-making process. Advancements in XAI have enhanced machine learning (ML) models’ interpretability, explainability, and transparency. Additionally, there has been speculation on whether it is possible to predict the type of dataset used in the model by analyzing the results. In this research, we proposed a methodology for determining the linearity or non-linearity …
Themes And Participants’ Role In Online Health Discussion: Evidence From Reddit, Massara Alazazi
Themes And Participants’ Role In Online Health Discussion: Evidence From Reddit, Massara Alazazi
Theses and Dissertations
Health-related topics are discussed widely on different social networking sites. These discussions and their related aspects can reveal significant insights and patterns that are worth studying and understanding. In this dissertation, we explore the patterns of mandatory and voluntary vaccine online discussions including the topics discussed, the words correlated with each of them, and the sentiment expressed. Moreover, we explore the role opinion leaders play in the health discussion and their impact on participation in a particular discussion. Opinion leaders are determined, and their impact on discussion participation is differentiated based on their different characteristics such as their connections and …
Electrical Characterization Of Cementitious Composites, Abbas Ali
Electrical Characterization Of Cementitious Composites, Abbas Ali
Theses and Dissertations
Multifunctional concrete using electrical conductivity gains attention for various nonstructural applications. Particularly, conductive concrete enables monitoring internal damages in concrete, which has been impossible by conventional nondestructive methods. On the other hand, most of on-going investigations on multifunctional concrete uses conductive additives to impart electrical conductivity into concrete, but this limits the multifunctional application to predesigned structures. Finding multifunctionality embedded in conventional concrete can open various possibilities for smart concrete. Aiming to finding the feasibility of using conventional concrete for multifunctional application, this study investigates the electrical properties of plain cementitious composites including cement paste, mortar, and concrete, but not …
Dopamine Dysregulation In Antiretroviral Drugs Treated Neuronal Cells, Andrea S. Bustos
Dopamine Dysregulation In Antiretroviral Drugs Treated Neuronal Cells, Andrea S. Bustos
Theses and Dissertations
According to the world health organization (WHO), 37.7 million people worldwide in 2020 were living with the human immunodeficiency virus (HIV-1). In the US, combination antiretroviral therapy (cART) drugs have shown effectiveness in combating HIV-1 infection. As a result, cART has prolonged the lifespan of people with HIV aiding these patients to age with the virus. Clinical evidence has established the long-term effects of cART in the aging population causing neuropsychiatric disorders such as depression. However, the underline molecular mechanism that cART induces depression-related neurodegeneration has not been established. This study will pursue a dopamine (DA) dysregulation marker in cART …
A Machine Learning Approach To Evaluate The Effect Of Sodium-Glucose Cotransporter-2 Inhibitors On Chronic Kidney Disease In Diabetes Patients, Solomon Eshun
Theses and Dissertations
Chronic kidney disease (CKD) is a significant complication that contributes to diabetes-related mortality in the United States, and there is growing evidence that sodium-glucose cotransporter 2 inhibitors (SGLT2i) can slow its progression. However, observational studies may suffer from confounding by indication, where patient characteristics and disease severity influence the decision to prescribe SGLT2i. This study utilized electronic health records of individuals with diabetes (from TriNetX) to investigate the effectiveness of SGLT2i on CKD progression. The database provided detailed information on patients’ CKD status, demographics, diagnosis, procedures, and medications, along with corresponding dates of diagnosis and prescription. The study comprised of …
Pronombres De La Tercera Persona Del Zapoteco De Macuiltianguis [Third Person Pronouns In Macuiltianguis Zapotec], Paula Margarita Foreman
Pronombres De La Tercera Persona Del Zapoteco De Macuiltianguis [Third Person Pronouns In Macuiltianguis Zapotec], Paula Margarita Foreman
Theses and Dissertations
As attested in Marlett (2010), the Zapotec languages of Oaxaca, Mexico, exhibit great variation within their pronominal systems. Based on my knowledge as a native speaker, I present a description of third-person pronouns in the Zapotec from the town of San Pablo Macuiltianguis (MacZ) (ISO 639-3 [zaa]) (Eberhard, Simons, & Fennig 2023), part of the Sierra de Juárez Juárez within the Sierra Norte branch of Zapotec (Smith Stark 2007). MacZ has four categories of third person pronouns (which can be called formal, general, child, and animal). The child and animal pronouns are generally optional, used to emphasize affection. The choice …
Essays On Behavioral Decision Making In Crowdfunding Environments, Bright Frimpong
Essays On Behavioral Decision Making In Crowdfunding Environments, Bright Frimpong
Theses and Dissertations
Crowdfunding has revolutionized the world of financing. From entrepreneurs to financially excluded individuals seeking funding for essential projects, crowdfunding provides an expansive platform for project founders to raise needed capital for pending or ongoing projects. In addition to raising capital, founders also use crowdfunding to test market an idea, gain exposure for future funding, gain validation, and build trusting relationships with backers (Zhou et al., 2018). However, the success of crowdfunding is dependent on crowd participation- backer support and funding. The importance of crowd participation in crowdfunding is not limited to project funding, but also building public involvement and support …
An Examination Of Factors Impacting Student Decisions To Engage In Physical Activity At A Hispanic-Serving Institution, Glenn R. Gray
An Examination Of Factors Impacting Student Decisions To Engage In Physical Activity At A Hispanic-Serving Institution, Glenn R. Gray
Theses and Dissertations
College students at a large south Texas university have proven consistently that they have a higher-than-average Body Mass Index (BMI), spend less time per week engaged in physical activity, and in general feel that they are less healthy than students in a national cross-sectional survey of college students by the American College Health Association (ACHA, 2021). This project investigates the barriers to activity and the motivators to engage in activity. In this cross-sectional study, the Exercise Motivations Inventory-2 and the Barriers to Being Active instruments along with a demographic survey have identified motivators and barriers. The collection of basic demographic …
Self-Perceived Stigma Of Caregivers With Children On The Autism Spectrum In Latin America, Leah Michelle Jara
Self-Perceived Stigma Of Caregivers With Children On The Autism Spectrum In Latin America, Leah Michelle Jara
Theses and Dissertations
With the prevalence of Autism Spectrum Disorder (ASD) continuing to spread along with limited knowledge on the disorder’s service accessibility, many caregivers are required to care for lifelong obligations, often at the sake of their own mental, physiological, and emotional health. This study aimed to explore self-perceived stigmas of caregivers in Latin America based on predictors including demographics, severity, and type of healthcare coverage. Participants included 2483 caregivers in Latin America who completed a survey targeting the challenges, priorities, barriers to care, and stigma they face caring for an individual with autism. Findings showed that age had a weak inverse …
Understanding The Developmental Regulation Of Opa1 Processing In C2c12 Myoblasts, Harpreet Kaur
Understanding The Developmental Regulation Of Opa1 Processing In C2c12 Myoblasts, Harpreet Kaur
Theses and Dissertations
Mitochondria is an energy-producing organelle in the cell that accept electrons from the Krebs cycle to generate energy in the form of ATP by oxidative phosphorylation. Two mitochondrial aspects, bioenergetics and dynamics are critical for energy balance and cellular stress responses. Mitochondrial dynamics refers to the balance between mitochondrial fusion (mitochondrial biogenesis) and mitochondrial fission (mitochondrial fragmentation). Cellular stress conditions that lead to dissipation of transmembrane potential (Δψm) trigger the activation of an IMM protein, OMA1, a metalloprotease that leads to processing of another IMM protein, optic atrophy-1 (OPA1) that mediates IMM fusion. Persistent stress primes the mitochondria to mitophagy …
From “Cowardice” To “Shellshock”: The Definition And Treatment Of Mental Health In The United States Marine Corps During The Age Of The Great War, Itzel Marquez
Theses and Dissertations
The aim of my master’s thesis is to study how the United States’ Marine Corps recognized, defined, and treated mental health issues during the Great War and how this translated into the treatment of Marines by their peers and commanding officers. Similar to other countries that fought in the Great War, also referred to as World War I, the United States witnessed intense discussions about the psychological effects of war. The question of whether and how modern warfare affected troops’ mental health was addressed by all branches of the United States’ military. Yet, the issue of mental health in the …
An Exploration Of Online Doctoral Students And The Ways They Cultivate Connections, Shannon Reynolds
An Exploration Of Online Doctoral Students And The Ways They Cultivate Connections, Shannon Reynolds
Theses and Dissertations
According to the United States Department of Education, 42.4% of postbaccalaureate students participated in online distance education during Fall of 2019. These numbers increased because of the Covid-19 pandemic of March 2020. The pandemic not only created a severe social and economic disruption, but it also disrupted all levels of education. This study examines exclusively online students enrolled with traditional face-to-face students and faculty. Understanding the impact of the pandemic, faculty and administrators can gain insights into how online learning can be adapted to meet the unique needs of advanced learners. The pandemic has forced many universities to move their …
The Synthesis And Characterization Of Metal Oxide Nanomaterial-Based Composites And Their Use As Antibacterial Agents, Jo A. Sanchez
The Synthesis And Characterization Of Metal Oxide Nanomaterial-Based Composites And Their Use As Antibacterial Agents, Jo A. Sanchez
Theses and Dissertations
The work presented in this thesis discusses the antibacterial properties of various metal oxides and metal oxide/polymer composite fibers. Polyvinylpyrrolidone (PVP) fibers embedded with Zinc Oxide nanoparticles (ZnO NPs) were prepared by centrifugal spinning from PVP aqueous solutions) and ZnO NPs. The ZnO NPs were synthesized and coated with different surfactants, cetyltrimethylammonium bromide (CTAB) and hexadecyltrimethylammonium bromide (HTAB). The effect of surfactant coating on the antibacterial activity of ZnO NPs and PVP/ZnO nanocomposite fibers against escherichia coli (e. coli) and bacillus megaterium (b. megaterium) bacteria was systematically investigated. The results showed that coating the ZnO NPs …
Congruences For Quotients Of Rogers-Ramanujan Functions, Maria Del Rosario Valencia Arevalo
Congruences For Quotients Of Rogers-Ramanujan Functions, Maria Del Rosario Valencia Arevalo
Theses and Dissertations
In 1919 the mathematician Srinivasa Ramanujan conjectured congruences for the partition function p(n) modulo powers of the primes 5,7,11. In this work, we study Ramanujan type congruences modulo powers of primes p = 7,11,13,17,19,23 satisfied by the Fourier coefficients of quotients the Rogers-Ramanujan Functions G(τ) and H(τ) and the Dedekind eta function η(5τ). In addition to deriving new congruences, we develop the foundational theory of modular forms to motivate and prove the results. The work includes proofs of congruences facilitated by Python/SageMath code.
Development Of A Unified Personal And Commercial Residential Hurricane Vulnerability Model Including Sensitivity And Uncertainty Studies, Roberto Vicente Silva De Abreu
Development Of A Unified Personal And Commercial Residential Hurricane Vulnerability Model Including Sensitivity And Uncertainty Studies, Roberto Vicente Silva De Abreu
Theses and Dissertations
As the population and properties in the state of Florida increase, there is an increase in hurricane losses. Hurricane winds and debris can impact the exterior components of a building envelope. The envelope breaches and defects of these components provide a pathway to hurricane wind-driven rain into the building, which causes interior and contents damage. Loss models, such as the Florida Public Hurricane Loss Model (FPHLM), estimate hurricane insured losses for portfolios of buildings. The vulnerability component of the FPHLM has a personal residential module (PR), for single family homes, and a commercial residential module (CR-LR), for apartment buildings. They …
Waste Biomass-Derived Ultraporous Functionalized Superactivated Hydrochars For Hydrogen Storage And Carbon Capture, Al Ibtida Sultana
Waste Biomass-Derived Ultraporous Functionalized Superactivated Hydrochars For Hydrogen Storage And Carbon Capture, Al Ibtida Sultana
Theses and Dissertations
Accelerating world population and simultaneous growth in economic race has resulted in parallel rise of waste generation where the necessity of mitigating the climate change, via transitioning towards a clean energy economy and minimization of greenhouse gas from atmosphere, is in urgent need of attention. Hence, the objectives of this dissertation comprised of firstly upcycling waste biomass into low-cost and effective adsorbent material such that, secondly, its surface could be tailored by modulating its synthesis conditions (hydrothermal carbonization and chemical activation) to be developed into ultraporous and functionalized adsorption medium in order to, thirdly, assess its application as adsorbents for …