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Large Eddy Simulation By Using Wang’S Liutex-Based Subgrid Model, Vishwa Shah

Mathematics Dissertations - Archive

Turbulent flows and vortex structures in fluid dynamics have been captivating researchers for decades, owing to their intrinsic complexity and significance in various industrial and natural processes. Despite their fundamental importance, the definition and identification of vortices in turbulent flows continue to pose challenges, and to date, no universally accepted approach exists. This pursuit dates to the pioneering work of Hermann von Helmholtz in the 19th century, when the concept of vortices was first introduced. In 2019, Liu et al. introduced a novel physical quantity termed "Liutex" in scalar, vector, and tensor forms, providing a promising avenue for understanding and …

Development & Validation Of Needle-Based Metrics For Hemodialysis Cannulation Skill Assessment, Ziyang Zhang

All Dissertations

Dialysis is a vital medical treatment for patients with end-stage renal disease. An arteriovenous fistula, a surgically created connection between an artery and a vein, is the preferred vascular access for dialysis due to superior clinical outcomes. However, cannulation complications caused by needle-related errors are common and dangerous, necessitating the need for effective cannulation training. Despite cannulation being a challenging and complex clinical procedure, little is known about the quantitative aspects of needle insertion dynamics necessary for skilled cannulation. The aim of this study was to develop meaningful and instructive needle-based metrics for cannulation skill assessment and training.

Two iterations …

A Framework For Statistical Modeling Of Wind Speed And Wind Direction, Eva Murphy

All Dissertations

Atmospheric near surface wind speed and wind direction play an important role in many applications, ranging from air quality modeling, building design, wind turbine placement to climate change research. It is therefore crucial to accurately estimate the joint probability distribution of wind speed and direction. This dissertation aims to provide a modeling framework for studying the variation of wind speed and wind direction. To this end, three projects are conducted to address some of the key issues for modeling wind vectors.\\

First, a conditional decomposition approach is developed to model the joint distribution of wind speed and direction. Specifically, the …

Discovery Of Ojt009 As A Novel Inhibitor Of Severe Acute Respiratory Syndrome Coronavirus 2 Infection For Potential Treatment Of C0vid-19, Tolulope Olayinka Adebusuyi

Dissertations (2016-Present)

The emergence of deadly SARS-CoV-2 variants with mutations in the viral genes has made it more imperative to discover therapeutics that target the host receptors for coronavirus disease (COVID-19) treatment. SARS-CoV-2 spike protein receptor-binding domain (RBD) binds to host ACE2 receptor, facilitating viral entry (Jackson, 2022). The Interaction between ACE2 and the RBD region of Spike protein is the most crucial step in the viral life cycle. Therefore, the ACE2- RBD interaction has remained a key target for therapeutics in COVID19 treatment. Therefore, our research has targeted this interaction to prevent SARS-CoV-2 entry into the human cells. ACE2, a key …

Co-Simulation Of Active Magnetic Bearing Rotors Using Adams, Msc Apex, And Simulink, Shea A. Charkowsky

Master's Theses

Apex-Adams-Simulink co-simulation is applied to active magnetic bearing (AMB) rotors, demonstrating results unshown in literature, including continuous frequency response, and unavailable in known rotor dynamics software, including touchdown bearing impact. AMBs levitate rotors without contact, so they involve no friction, wear, lubrication, pollution, or shaft speed limits and are thus valuable for large, high-speed applications. Modeling of such rotors, necessary for safety and performance, simultaneously requires flexible body dynamics and advanced control design, but simulation programs tend to specialize in only one or the other. The co-simulation method combines multiple such programs—MSC Apex (finite element modeling), Adams (multibody dynamics), and …

Phase Distribution Of Nickel, Chromium, And Cobalt In Seawater At Olivine-Enriched Beaches: Implications For Carbon Capture By Enhanced Silicate Weathering, Nathaniel J. Padrnos

Master's Theses

The application of olivine to coastal areas is a proposed method of removing carbon dioxide from the atmosphere for climate change mitigation. Olivine is abundant and dissolves relatively fast, but it contains trace amounts of nickel (Ni), chromium (Cr), and cobalt (Co) which may be toxic to marine biota in cases of widespread coastal olivine spreading. Prior studies have suggested that Ni concentrations in marine sediments and/or the overlying water column due to olivine dissolution could be a limiting factor for its carbon capture potential. Therefore, it is critical to understand and model the processes affecting trace metal bioavailability after …

Tennessee Labor Market Report, August 2023, 2022 Tennessee Occupational Employment & Wages, Tennessee. Department Of Labor & Workforce Development.

Labor Market Reports

No abstract provided.

Generative Neural Network-Based Defense Methods Against Cyberattacks For Connected And Autonomous Vehicles, M Sabbir Salek

All Dissertations

The rapid advancement of communication and artificial intelligence technologies is propelling the development of connected and autonomous vehicles (CAVs), revolutionizing the transportation landscape. However, increased connectivity and automation also present heightened potential for cyber threats. Recently, the emergence of generative neural networks (NNs) has unveiled a myriad of opportunities for complementing CAV applications, including generative NN-based cybersecurity measures to protect the CAVs in a transportation cyber-physical system (TCPS) from known and unknown cyberattacks. The goal of this dissertation is to explore the utility of the generative NNs for devising cyberattack detection and mitigation strategies for CAVs. To this end, the …

A Mixed Methods Analysis Of Influences Surrounding Undergraduate Science Recruitment: Identifying Challenges And Opportunities, Evelyn Abagayle Boyd

All Dissertations

Often prevalent in the sciences, undergraduate research experiences (UREs) are highly beneficial engaged learning experiences in higher education. Though the benefits of UREs are well established, there is little information about which students participate in these experiences and the pathways they take to become engaged in them. This study consists of three works which surround the overarching research question: How do undergraduate science students initialize research experiences such that departments and institutions can improve access to these high-impact practices? Utilizing the intersection of the theories of Science Capital and Social Cognitive Career Theory, this study provides insight and recommendations into …

Orientation 2023 : Roger Williams University School Of Law, Roger Williams University School Of Law

School of Law Conferences, Lectures & Events

No abstract provided.

Elementary School Principals’ Perceptions Of Successes And Challenges Implementing Racial Equity Leadership Practices, Nicole M. Reid Christopher

Education Doctoral

This qualitative phenomenological study examines the professional experiences of eight principals who have undergone professional learning in race and racial equity in schools and have led public elementary schools serving at least 5% Black students for a minimum of 3 years. Through a phenomenological design, this study explores the phenomenon of equity leadership practices. Data from individual, semi-structured interviews were analyzed using descriptive phenomenology. The findings of the study suggest that trained principals are consciously making attempts to employ equity-focused leadership practices, albeit with limited success. They encounter several challenges and seek support from higher levels of leadership. This study …

$752,000 Usda Grant Will Help Researchers Prevent Food Contamination, University Of Dayton

News Releases

A pair of University of Dayton researchers are part of a $752,000 grant from the U.S. Department of Agriculture to help prevent Listeria and other contamination in food.

The Future Of Public And Private Plant Breeding According To Plant Scientists, Lexie Burris

Graduate Theses and Dissertations

Plant breeding has been effective in addressing food insecurity by increasing agricultural yields and productivity. Historically, public plant breeding programs have long-term, integrated approaches to plant breeding research, germplasm enhancement, and variety development, but as funding is reduced the future is less certain as to areas of focus. This survey builds off those before it and asks the next logical question, if a divergence between private and public breeding is taking place, what aspects should each sector focus on? The impetus of this study was to ask opinions of plant breeders globally regarding the direction they believe the public and …

Analysis Of Library And Information Science Journals Listed In Ugc-Care: A Study, Parbat Chhetri

Library Philosophy and Practice (e-journal)

This research study focuses on the Library and Information Science (LIS) journals listed in UGC-CARE between June 2019 and July 2023, with the purpose of offering valuable insights to researchers and practitioners in the field. The study employs a comprehensive data collection methodology, involving systematic review from academic databases, journal publishers' websites, and UGC CARE's official records. The selected journals are categorized based on various aspects, including publishers, geographical distribution, frequency of publication, publication language, ISSN/E-ISSN, Article Processing Charges (APCs), Open Access status, citation styles, and the availability of Document Object Identifiers (DOIs) and Creative Commons Licences. Notably, the study …

Design And Simulation Of A Utility Oilfield Flare In Iraq/Kurdistan Region Using Cfd And Api-521 Methodology, Ahmed A. Maaroof, Joseph D. Smith, Mohammed H.S. Zangana

Chemical and Biochemical Engineering Faculty Research & Creative Works

This paper aims at reviewing and analyzing the operation and design of a utility flare in an oilfield in the Iraq/Kurdistan region. The flare supports a gas separation unit that separates 100 MMSCFD of natural gas from other liquid compounds in petroleum refining. The actual flare dimensions are 50 m high and 0.6 m diameter and works in summer where the crosswind speed is 9 m/s and a flow of 1.2 MMSCFD of treated natural gas is flaring through it. At the beginning, the flare design was performed using the API-521 recommended approach based on full operating capacity of the …

Spectral Characterization Of Fouled Railroad Ballast Using Hyperspectral Imaging, Eberechi Ichi, Sattar Dorafshan

Civil Engineering Faculty Publications

The presence of fouling contamination in railroad ballast is a growing concern that causes deterioration, poor drainage functionality, and early failure of railroad components. Evaluation and characterization of fouled ballast are crucial for determining and monitoring fouling content (FC) and moisture content (MC) in ballast. However, human inspection, destructive testing, filed sampling, and most available nondestructive evaluation methods (NDE) for inspection purposes pose safety risks, undermine the stability of the railroad substructure, or provide limited information about the condition of the ballast. This study presents the results of the spectral characterization of laboratory ballast samples using hyperspectral imaging (HSI) sensor. …

An Integrated Finite Element Method And Machine Learning Algorithm For Brain Morphology Prediction, Poorya Chavoshnejad, Liangjun Chen, Xiaowei Yu, Jixin Hou, Nicholas Filla, Dajiang Zhu, Tianming Liu, Gang Li, Mir Jalil Razavi, Xianqiao Wang

Computer Science Faculty Research & Creative Works

The human brain development experiences a complex evolving cortical folding from a smooth surface to a convoluted ensemble of folds. Computational modeling of brain development has played an essential role in better understanding the process of cortical folding but still leaves many questions to be answered. A major challenge faced by computational models is how to create massive brain developmental simulations with affordable computational sources to complement neuroimaging data and provide reliable predictions for brain folding. In this study, we leveraged the power of machine learning in data augmentation and prediction to develop a machine-learning-based finite element surrogate model to …

Developing A Simple Strategy For Roadside Spring Water Disinfection In Central Appalachia, Hannah Patton, Leigh-Anne Krometis, Ben B. Faulkner, Alasdair Cohen, Erin Ling, Emily Sarver

Journal of Contemporary Water Research and Education

Several studies have highlighted issues of unreliable access to safe drinking water in the Appalachian region. In some cases, residents turn to roadside springs as a practical, and culturally valuable, drinking water source. However, public reliance on roadside springs for potable use can present concerns, as bacterial contamination of spring water has been documented throughout Appalachia. This study aimed to 1) develop a simple, low-cost protocol using household bleach to inactivate total coliform and E. coli in untreated roadside spring water; 2) provide educational materials at local roadside springs to inform users of this simple treatment strategy; and 3) assess …

An Analysis Of Skylight And Alternative Applications In The Adaptive Reuse Of The Ridgedale Mill, Robyn Wood

Honors Theses

Designing sustainably, at its core, holds the health and wellbeing of the users of the space and the price of ongoing maintenance and installation costs in balance with environmental wellbeing. With each of these points playing a major role, spaces can be designed to be healthy and affordable while also benefiting the overall functional health and efficiency of the space. A key method in designing sustainably is the incorporation of natural daylight within a space to provide general lighting in an energy efficient way and to positively impact the atmosphere of the built environment. For the users of the space, …

Shadings Of Nuance: Contextualizing A “Convergence Of Opinion” Regarding A River Located In The Imaginarium Of The Western Mind, Christopher R. Rossi

Wyoming Law Review

No abstract provided.

Educators’ Perspectives Of Using (Or Not Using) Online Exam Proctoring., David Balash, Elena Korkes, Miles Grant, Adam J. Aviv, Rahel A. Fainchtein, Micah Sherr

Department of Math & Statistics Faculty Publications

The onset of the COVID-19 pandemic changed the land- scape of education and led to increased usage of remote proc- toring tools that are designed to monitor students when they take assessments outside the classroom. While prior work has explored students’ privacy and security concerns regard- ing online proctoring tools, the perspective of educators is under explored. Notably, educators are the decision makers in the classrooms and choose which remote proctoring ser- vices and the level of observations they deem appropriate. To explore how educators balance the security and privacy of their students with the requirements of remote exams, we …

Changes To Water Quality And Discharge In An Urban Stream In Southwest Jefferson County., Karina Henson

Electronic Theses and Dissertations

Mill Creek is the largest watershed in Southwest Jefferson County, where thousands of people live and work. Streams in the watershed have historically been channelized and altered to promote drainage, and stream health is of major concern. Louisville MSD is currently developing a watershed plan for Mill Creek by seeking understanding of current stream conditions. This paper will focus on historical trends in stream discharge and water quality. Peak and daily discharge, dissolved oxygen, specific conductance, and temperature data from USGS gages at Mill Creek and the Mill Creek Cutoff was analyzed to understand how water quality and flow rates …

Cannabidiol Tweet Miner: A Framework For Identifying Misinformation In Cbd Tweets., Jason Turner

Electronic Theses and Dissertations

As regulations surrounding cannabis continue to develop, the demand for cannabis-based products is on the rise. Despite not producing the psychoactive effects commonly associated with THC, products containing cannabidiol (CBD) have gained immense popularity in recent years as a potential treatment option for a range of conditions, particularly those associated with pain or sleep disorders. However, due to current federal policies, these products have yet to undergo comprehensive safety and efficacy testing. Fortunately, utilizing advanced natural language processing (NLP) techniques, data harvested from social networks have been employed to investigate various social trends within healthcare, such as disease tracking and …

Determining The Existence And Regulation Of Microlipophagy In Primary Brown And White Adipocytes, Sara C. Arenas De Leon

Biomedical Sciences ETDs

Lipids are one of life’s four main macromolecules and provide essential functions to cells.

The degradation of lipid droplets and mobilization of lipids occurs through lipolysis. Emerging evidence demonstrates evidence of a selective form of autophagy in lipolysis. The process of microlipophagy has only recently been described, and many features of its regulation are still poorly understood. Our recent study showed that inhibiting mammalian target of rapamycin complex 1 (mTORC1) pathway by depletion of Raptor in adipocytes led to an influx of lysosomes and accumulation of lipid droplets within lysosome. Here, we expand on these previous findings. We were able …

Annual Report Of The Nominating Committee For The Academic Year 2022-2023, University Of Northern Iowa. Faculty Senate.

Documents - Faculty Senate

University Nominating Committee report including committee memberships, produced by the Faculty Senate of the University of Northern Iowa.

Electronic Books: Educational Enhancement Or Novelty?, Felipe O. Reyes

Theses and Dissertations

The study’s purpose was to explore if there was a statistically significant difference in reading comprehension of non-Limited English Proficient students when reading eBooks compared to printed books. Second, it explored if there was a statistically significant difference in Limited English Proficient students. Third, it explored if there was a statistically significant difference between non-Limited English Proficient and Limited English Proficient students while reading in neither format. The research sample of the study drew from the population (N=8,100) of students at the middle school level within a district in south Texas who participated in the Accelerated Reader program during …

Innovating The Communication Pedagogy: An Application Of Flipped Classroom Technique In Communication Education, Gamze Yilmaz

Journal of Communication Pedagogy

As students try to make sense of their college experience and the value of attaining a degree post-pandemic, educators are grappling with finding new methods to re-engage students in the classroom using a range of modalities. This case study explored student reactions to flipped classroom learning experiences, and possible relationship between the flipped classroom technique and academic performance in communication education. As a student-centric pedagogical method, the flipped classroom can offer a promising remedy for student disengagement, and the findings of this study provide supporting evidence for this conclusion. Students characterized flipped classroom as a very favorable learning experience as …

Educating Older Drivers To Improve Acceptance And Utilization Of Cav Technologies, Ping Yi, Claudia Marovic, Renee Whittenberger

University Research

As the population of older drivers continues to grow, there is an increasing need to enhance their awareness and understanding of Connected and Automated Vehicles (CAVs). This study utilized an education program aimed at improving the knowledge and awareness of older drivers about CAVs, thereby preparing them to utilize the safety features of these technologies while effectively meeting the challenges that come with them. Through data collection and analysis from study participants, the research provides valuable insights for transportation agencies and technology developers to design and develop more adaptive technologies and associated education for older drivers. The findings from this …

Towards Global And Local Histories Of Educational Technologies: Introduction, Katie Day Good, Barbara Hof

University Faculty Publications and Creative Works

This introduction summarises the objectives and themes of a special issue that highlights global-local interdependencies in the history of educational technologies. It suggests that discussions of the development, diffusion, and use of technologies of teaching and learning around the world could benefit from a broadening of the definition of educational technologies, a diversification of research materials and practices, and a focus on underrepresented voices and asymmetrical power relations. Offering such perspectives, the ten articles included in the special issue present welcome approaches to tracing the historical and contemporary adoption of technologies in and beyond educational settings.

Multidrug Resistance Of Escherichia Coli From Outpatient Uncomplicated Urinary Tract Infections In A Large United States Integrated Healthcare Organization, Katia J. Bruxvoort, Jennifer H. Ku, S. Bianca Salas, Cara D. Varley, Joan A. Casey, Eva Raphael, Sarah C. Robinson, Keeve E. Nachman, Bruno J. Lewin, Multiple Additional Authors

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background

Urinary tract infections (UTIs) cause significant disease and economic burden. Uncomplicated UTIs (uUTIs) occur in otherwise healthy individuals without underlying structural abnormalities, with uropathogenic Escherichia coli (UPEC) accounting for 80% of cases. With recent transitions in healthcare toward virtual visits, data on multidrug resistance (MDR) (resistant to ≥3 antibiotic classes) by care setting are needed to inform empiric treatment decision making.

Methods

We evaluated UPEC resistance over time by care setting (in-person vs virtual), in adults who received outpatient care for uUTI at Kaiser Permanente Southern California between January 2016 and December 2021.

Results

We included 174 185 individuals …