Digital Commons Network^™

Genetic Relative-Finder Services: A Qualitative Study Of Consumer Experiences, Sarah A. Sciba

Theses and Dissertations

Background: Genetic genealogy is an emergent topic in sociology. To date, over 41 million individuals worldwide have tested with the top four direct-to-consumer genetic testing (DTCGT) companies: AncestryDNA, FamilyTreeDNA, 23andMe, and MyHeritageDNA (Glynn 2022). These tests provide consumers with ethnicity estimates, a list of DNA cousin matches, or both. Despite the popularity of DTCGT, there is a lack of data on consumer experiences with genetic relative-finder services (GRF) in the sociological literature. Methodology: I conducted exploratory, qualitative research in the form of in-depth interviews with eight adult women who have used GRF. I gathered data about their motivations for participation …

At The Mercy Of All Things: Nurturing Experimental Queer Writing On Embodied Mothering, Charley Koenig

Theses and Dissertations

This dissertation is an exploration of the ability of experimental queer writing to grow and transform expressions of mothering and care. The moves made here—both in the scholarship and anchor texts examined herein and in my own contributions to this effort—work to dethatch those toxic dominating narratives on motherhood, enforced and reinforced by our current Western society and culture, that contaminate and restrict our constructions of what it means to be and do mother. The collective work of experimental queer writers makes possible more nuanced, realistic, messy, complex, varied, embodied, liberating, and literally and figuratively dirty renditions of mothering and …

Predictive Modeling For Multiphase Flow Boiling Heat Transfer By Integrating Computational Fluid Dynamics And Machine Learning Approaches, Mohamed Elfaham

Theses and Dissertations

The heat transfer process in multiphase flow systems becomes essential forindustrial applications and when phase change occurs. The heat transfer coefficients become more efficient during boiling and condensation processes when compared to single-phase fluid flow. The design of thermal systems requires knowledge about these coefficients together with their essential parameters. This study evaluates flow boiling heat transfer coefficients for low-global warming potential refrigerants which include pure ethanol and propane (R-290) and R- 600 and R-600A. The experimental database included more than 25 independent studies that covered various operating conditions and channel sizes and fluid properties. Existing empirical correlations were evaluated, …

Computational Prediction Of Hemolysis In Laminar Non-Newtonian Fluid, Nasim Gholizadeh

Theses and Dissertations

Hemolysis, the rupture of red blood cells (RBCs), is a critical concern in blood-circulating devices, requiring accurate predictions to ensure patient safety. This study investigates the sensitivity of hemolysis predictions to variations in viscosity models and hemolysis coefficients under complex flow conditions. Computational Fluid Dynamics (CFD) simulations were conducted using Ansys Fluent and OpenFoam on identical meshes with the FDA benchmark nozzle model. Under laminar flow conditions, CFD frameworks accurately predicted global variables, but variations in derived quantities, such as strain rate and vorticity, emerged due to differences in numerical solvers and gradient evaluation methods. These variations affected predictions of …

Extreme Environment Tribological Studies Of Multifunctional Materials, Matt Malusky

Theses and Dissertations

This research examines polymer wear behaviors across polyether-etherketone (PEEK) and polylactic acid (PLA) composites in varying environmental conditions. Tribological investigations of ceramic and intermetallic coatings are explored in the context of material selection for lunar operation. In the first study, PEEK composites incorporating ternary nanolaminate ceramics, termed MAB and MAX phases, were tested in varying temperature environments above and below their expected glass transition temperatures to evaluate their tribological performance in comparison to a non-reinforced PEEK substrate. Results showed that under ambient conditions, both MoAlB (MAB phase) and Cr2AlC (MAX phase) ceramics stabilize the friction coefficient compared to pure PEEK, …

Domain Adapted Signal Classification For Simulated And Real-World Signals, Mohammad Ali

Theses and Dissertations

Signal classification models based on deep neural networks are trained on a set of data either simulated or over-the-air that are restricted to specific channel environments, varying distortion conditions such as SNR offsets. The consequence are models that unexpectedly do not do well in scenarios when the feature distribution between domains are too large such as when simulated models are deployed in real world environments. In this regard, we propose signal classification framework leveraging Domain-Adversarial Neural Networks to address SNR variability for simulated data Unsupervised Domain Adaptation frameworks for simulated to real world signals. Our first approach employs domain adversarial …

Advanced Motor Control Using Td3 Model-Free Reinforcement Learning, Muhammad Azam

Theses and Dissertations

Motor control plays a critical role in industrial automation, ensuring the precise regulation of speed, torque, and position across various applications. Traditional motor control techniques, such as open-loop, closed-loop, and feedback control, have been widely used but face limitations in handling complex and dynamic systems. Recent advancements in machine learning (ML) offer potential improvements in motor control by enabling systems to learn optimal control policies autonomously. This research investigates the integration of Reinforcement Learning (RL) with Field-Oriented Control (FOC) for the control of Permanent Magnet Synchronous Motors (PMSMs). The study aims to address a significant gap in reward function design, …

Ai-Bms: Ai Battery Management System For Safe Uas Operations In High Electric And Magnetic Fields And Uncertain Conditions: Wind, Battery Drain, Temperature, And Payload, Tanzim Jim Hassan

Theses and Dissertations

Unmanned aerial systems/vehicles (UAS/UAVs) are increasingly utilized for inspecting high-voltage (HV) transmission (Tx) lines. However, operating in the vicinity of electric (E) and magnetic (H) fields can affect UAV control and battery performance. Pilots unfamiliar with high E/H field environments often struggle to accurately estimate remaining flight time, resulting in either premature mission terminations or crashes due to depleted batteries. To address these challenges, this thesis focuses on developing an intelligent Battery Management System (BMS) for UAVs to ensure safe and reliable surveillance operations under various uncertain conditions, such as wind gusts, temperature variations, E/H fields, battery drain, and payload …

Investigation In Using Kinesthetic Learning Of Electricity And Magnetism In Scale-Up, Joseph Charley Langenwalter

Theses and Dissertations

This study investigates the effectiveness of incorporating kinesthetic learning activities into a SCALE-UP (Student-Centered Active Learning Environment with Upside-down Pedagogies) physics course to improve students' conceptual understanding of electricity and magnetism. This study aims to explore the effects of adding kinesthetic activities to a first-year 2nd semester physics course on student learning that included 92 students in three groups, traditional, scale-up control, scale-up activity classrooms. Nine active learning activities were designed to promote learning. A unique pre-post instrument was used to gauge student learning. Three questions from an instrument showed statistically significant improvement in student scores from the semester that …

Development Of A Climbing Collaborative Mobile Manipulator (C2m2) For Supporting In-Space Assembled Truss Structures, John Robert Isaac Merila

Theses and Dissertations

The Climbing Collaborative Mobile Manipulator (C2M2) is being developed as a robotic system to support truss outfitting operations. The goal of the project is to build a truss climbing robot and demonstrate gaits that allow the robot to reach any point on the structure. The demonstrated motions are compared to simulated joint data. Design and construction of the robot was completed to allow for the robot to traverse the structure and operate as a stationary manipulator while grappled to the truss. A worm gear actuator system was developed for use in three 2-DOF modules composed into the 6-DOF robot. The …

Stimulating Focus And Calmness Through Soft Fabrication: A User-Centered Approach, Emmanuella A. Oku

Theses and Dissertations

This study explores the potential of active attention objects embedded with technologies such as LEDs to enhance focus and calmness in individuals with inattentive ADHD, particularly in classroom settings. Individuals with inattentive ADHD often struggle with irritability, stress, and panic attacks when exposed to external stimuli such as loud sounds, varying light intensities, strong smells, or physical sensations, which significantly hinders their ability to concentrate and remain composed. My literature review discovered a connection between an individual’s blinking pattern and their focus, and my work explores how to design active attention objects to engage with blinking as a focus tactic. …

“Don’T Panic, It’S Just Ai:” A Qualitative Study On Internal Communication Strategies For Managing Ai-Driven Change”, Edikan Nkanta

Theses and Dissertations

This qualitative study investigated how organizations utilize internal communication strategies to navigate AI-driven change effectively. Through semi-structured interviews with eleven communication professionals and change leaders across various industries, the research identified key communication approaches that facilitate successful AI implementation. Findings revealed three primary strategies: framing AI as a tool that enhances rather than replaces human capabilities, connecting AI initiatives to organizational purpose and business goals, and demonstrating practical use cases through concrete examples. The study also highlighted the importance of establishing clear guidelines for responsible AI use, making initial adoption optional rather than mandatory, and directly addressing job security concerns. …

Neural Network Algorithm And Analysis For Multi-Label Ecg Data Classification, Akhil Raghava Kalal

Theses and Dissertations

Electrocardiogram (ECG) analysis is a fundamental diagnostic tool in cardiology, providing critical insights into cardiac function that directly impact patient care decisions and treatment outcomes. As healthcare systems face increasing demands, automated ECG interpretation using artificial intelligence offers promising solutions to improve diagnostic accuracy, reduce physicians workload, and enhance early detection of life threatening conditions.

This thesis compares two advanced deep learning architectures, CNN-GRU and Wide and Deep Transformer, for multi-label classification of 12-lead ECG data. Using data from the PhysioNet/Computing in Cardiology Challenge 2020, I evaluated both architectures across 27 different cardiac abnormalities. Results demonstrated that CNN-GRU architecture consistently …

The Impact Of Loss Function Topology On Gradient Descent, Robert B. Skudnig Jr.

Theses and Dissertations

Gradient descent is a popular optimization method that utilizes a model’s prediction error to iteratively improve its parameters for a given task. The functions that measure this error can be defined to align with the user’s goals and sometimes satisfy metric or norm properties. It is common for these functions to measure over Rn, but any differentiable space allows for gradient descent to occur. There has been some research investigating the influence of topological spaces on optimization methods, but it is a limited field of study. This thesis further explores this phenomenon by applying a transformation prediction model to multiple …

Exploring How Political Affiliations Influence Trust In Ai Applications, Md Imran Ahsan

Theses and Dissertations

This paper examines the impact of partisanship on public trust in the utilization of Artificial Intelligence (AI) by private and public institutions. This study utilizes data from the “Artificial Intelligence: American Attitudes and Trends” survey (Zhang & Dafoe, 2019). Survey-weighted OLS regression models are employed to examine the variations in trust levels across different private and public institutions. This study hypothesizes that H1: Compared to Republicans, Democrats will report higher levels of confidence in public institutions to develop AI in the best interests of the public. H2: Compared to Democrats, Republicans will report higher levels of confidence in private institutions …

Warriors Of Faith Vs Passive Men: Gender Binarism And Performance In Evangelical Christian Masculinity, Alexander Koch

Theses and Dissertations

My thesis examines communications and reflections of self (gendered and religious) in Midwest Evangelical Christian men. The focus was on how these groups perform their gender and religion with each other, and the tactics that were used to reinforce an acceptable notion of masculinity. Drawing upon literature on gender and masculinity studies, feminist philosophy, and hierarchical systems, my project aimed to analyze acceptable gender performance pushed by patriarchal gender norms and evangelical Christian groups. I incorporated multiple settings in my ethnographic study across the Midwest. Methods included semi-structured interviews and participant-observation of men’s conferences and Christian men’s groups, while reflecting …

Asymmetric Synthesis Of The Hiv Protease Inhibitor Tmc-126 And An Anti-Malarial Agent Via A Titanium Tetrachloride Mediated Asymmetric Glycolate Aldol Addition Reaction. Redefining The Curtius Rearrangement Reaction Via Dehomologation Of Carboxylic Acids Bearing Alpha-Leaving Groups, Kweku Amaning Affram

Theses and Dissertations

Acquired Immune Deficiency Syndrome (AIDS) and malaria are two devastating infectious diseases caused by HIV and Plasmodium parasites. AIDS is caused by HIV-1 and HIV-2, transmitted through sexual contact, blood transfusions, needle sharing, and perinatal routes. Malaria, caused by plasmodium parasites through mosquito bites. Today, millions of people around the world have been infected with HIV and malaria and much research has been done to treat it. However, despite advancements in therapeutic options, these diseases remain a significant global health threat, particularly in developing countries due to the emergence of drug-resistant strains for both HIV and malaria complicating eradication efforts. …

Exploring Nitrate Reduction In A Saturated Riparian Buffer Through A Three-Dimensional Reactive Contaminant Transport Model In An Agricultural Area, Mcclean County Central Illinois, Franklin O. Ijigade

Theses and Dissertations

Saturated Riparian Buffers (SRBs) are engineered systems designed to remove nitrate and other pollutants from subsurface agricultural drainage water before it reaches a stream. This study utilizes a high-resolution coupled flow and reactive transport model to explore nitrate reduction and transformation in an SRB in glacial sediment. The influence of material heterogeneity on nitrate reduction and the effectiveness of the SRB was investigated. The study was conducted in an SRB located next to and receiving tile drainage water that ultimately drains into a 3^rd order stream (T3 stream) in central Illinois, USA. A three-dimensional steady groundwater flow model was …

Site-Specific Modification Of Antibodies Utilizing Microbial Transglutaminase For Improved Immunoassay Performance, Emily Beitello

Theses and Dissertations

Immobilization strategies used for fixing antibodies to solid phase surfaces significantly contribute to the antigen capture capacity and influences the performance and sensitivity of immunoassays. Traditional methodologies result in the random orientation and/or the weak attachment of immobilized antibodies. Different formats of immunoassays scope in applicability to many fields of research and everyday use. Improving the efficiency of immobilizing antibodies in immunoassays is a beneficial endeavor to increase assay sensitivity. Here, we investigated the use of enzyme-mediated conjugation of antibodies to facilitate a highly oriented immobilization. Microbial transglutaminase (mTG) catalyzes the covalent bond formation between a plethora of primary amine …

Application Of Floating Wetlands To Improve Urban Stream Quality, Daniel Chukwunonso Chukwudi

Theses and Dissertations

Urban streams, impacted by urbanization, often exhibit degraded water quality due to elevated nutrient levels, a phenomenon known as urban stream syndrome. This study evaluates the effectiveness of a floating wetland (FW) system in reducing nitrate as nitrogen (NO₃-N) and phosphate (PO₄³⁻) concentrations in a side canal of the Chicago River’s North Branch, adjacent to Goose Island, Chicago, IL, from 2018 to 2023. Using a five-year dataset, including new sampling from May to December 2023, the research addresses two questions: (1) Do FWs lower NO₃-N and PO₄³⁻ concentrations in urban streams? and (2) Do FWs exhibit seasonal differences in nutrient …

Converting Cover Crop Biomass To Biogas And Volatile Fatty Acids, Tuba Yasmin Lubna

Theses and Dissertations

Cover crops are commonly used for their environmental benefits, including improved soil health and reduced soil erosion. However, there is limited use for the aboveground biomass, except for oilseed crops. The objectives of this study were to (1) characterize the selected winter cover crop biomass at three growth stages, (2) evaluate the biogas and volatile fatty acids (VFAs) yield, and (3) examine the concurrent alkali pretreatment and ensiling effects on biogas yield. Wild pennycress, golden pennycress, CoverCress^TM, annual ryegrass, cereal rye, pea, and clover biomass were harvested at three growth stages. Results showed that biogas yield increased with …

Inherited Wounds: Navigating Intergenerational Trauma Through Cooperative Play, Ayza Sheikh

Theses and Dissertations

'Strength' for Pakistani women is often defined as compromise, sacrifice, and silence. This definition has shaped intergenerational struggles in which women's self-narratives are constructed through suppression. Inherited Wounds seeks to address the trauma of suppression by creating a safe space for expression that fosters reflective and emotion-driven dialogue between Pakistani mothers and daughters.

Using interactive storytelling and embodied play, I developed a choice-based, narrative-driven video game and accompanying gesture-based controller. The game unfolds across childhood, marriage, and motherhood, mirroring the cycle of intergenerational struggle. Navigating choices in the game requires physical, intimate cooperation. The game uses the protagonist’s life as …

Assessing Teachers’ Conceptual Leadership Perceptions Of School-Site Administrators As An Approach To Improve Teacher Morale, Darlene C. Landy

Theses and Dissertations

The purpose of this study was to have teachers complete a self-assessment survey to assess their conceptual belief of the leadership styles of school-site administrators that are conducive to high teacher morals. The questions addressed how teacher morale affected the teachers according to the number of years they had been teaching, their college majors, their highest college degree, their gender, and their ethnicity. The teachers who participated in this study were volunteers who had to be teaching for 2 years or more.

This was a quantitative study that used the Teacher Rapport With Principal dimension of the Purdue Teacher Opinionnaire …

The Lived Experiences Of Project Rebound Students In California, Jeffrey R. Jacobs

Theses and Dissertations

As the United States attempts to address issues of prison overcrowding, recidivism, and rehabilitation, states like California have turned to higher education during and after incarceration to remedy the situation and promote successful community reentry among individuals who have served time in the nation’s prisons. People who are formerly incarcerated are often up against a myriad of obstacles once released, and programs like California State University’s Project Rebound aim to aid in this transition through a model rooted in community and campus care. Numerous bodies of research have explored the impacts of education on individuals who are actively incarcerated; however, …

The Development Of A One Pot, Two Reaction Synthetic Preparation Of 1,2,4-Oxadiazole, And Synthesis Of Ataluren, A Novel Drug In The Fight Against Duchenne Muscular Dystrophy. Efforts Towards The Synthesis Of A Potential Protease Inhibitor Against The Main Protease (3clpro) Of Covid-19, Austin J. Carter

Theses and Dissertations

1,2,4-Oxadiazoles are five-membered heterocyclic structures first synthesized by Tiemann and Krüger in 1884. Recent discoveries suggest an array of useful biological properties.In preparation of 1,2,4-oxadiazoles, the most prevalent precursors are amidoximes, which can be created via the reaction of nitriles with hydroxylamine hydrochloride and a base. The amidoximes are reacted with an activated carboxylic acid to yield an acylated intermediate. This intermediate can be exposed to a base to cyclize into the 1,2,4-oxadiazole. This thesis describes the efforts in combining these three steps into a unified one-pot synthesis.

Currently, there are a significant number of commercially available FDA approved and …

Hydronic Parking Lots: A Solution For Urban Heat Island Mitigation, Sumeet Jinnappa Paramaj

Theses and Dissertations

The Urban Heat Island (UHI) effect has emerged as a critical challenge in modern cities. It contributes to elevated local temperatures, placing significant stress on urban ecosystems and public health. One of the primary drivers of this phenomenon is the widespread use of impervious surfaces, such as dark-colored parking lots, which absorb heat during the day and gradually release it at night. This ongoing cycle results in persistently warmer urban environments. As cities continue to expand and densify, the need for effective, sustainable strategies to reduce urban heat becomes increasingly urgent.

This project aims to explore innovative interventions, particularly in …

Utilizing Information Technology And Hands-On Learning Practices To Improve Student Learning Outcomes In A High Failure Rate Introductory Programming Course, Todd Edward Thomas

Theses and Dissertations

The purpose of this study was to introduce and examine the impact that two interventions have on a high failure rate introductory programing course: a pedagogical approach of introducing Live Coding instruction technique to the in-person lecture portion, and a technological approach of introducing remote collaboration software (VS Code Liveshare) to the online lab portion. This study used convergent parallel mixed methods approach for both data collection and analysis; utilizing four data collection methods: 1) online survey questionnaires 2) in-depth interviews 3) in class observations and 4) quantifiable data collection (ie., student demographic, IT experience, GPA data). The Live Coding …

Area Of Effect The History And Effects Of Linguistic Choices Made In The Final Fantasy Franchise, Camille Mcdermott

Theses and Dissertations

The Final Fantasy franchise, a seminal role-playing game (RPG) series, has captivated a global audience since its inception in 1987. This thesis, titled "Area of Effect: The History and Effects of Linguistic Choices Made in the Final Fantasy Franchise," explores the intricate use of language that has shaped the series' identity and influenced its worldwide fanbase. The linguistic landscape of Final Fantasy is as diverse and dynamic as its fantastical worlds, evolving from simple text boxes to fully voiced narratives. This study examines the historical context and evolving linguistic choices throughout the series, highlighting how these decisions enrich the gaming …

Harmony Or Discord? A Study On The Alignment Between National Objectives And Reformed Social Studies Textbooks In Egypt, Lina Yehia

Theses and Dissertations

Education systems, in many parts of the world, have served as a channel for communicating national goals to students, and Egypt has not been an exception. This study examines how public textbooks effectively align with equipping future generations of Egyptians to fulfill the nation’s development policy goals set for 2030. Utilizing a qualitative research design, this study employed textbook and document analyses of the published national policy goals of the current administration, along with the most recently reformed social studies textbooks of Grades 4, 5, and 6, a product of EDU 2.0. Based on an analysis of national documents, the …

Comparative Analysis Of Lstm-Based And Traditional Hydrologic Models For River Discharge Prediction: A Case Study Of The Goose River, Adewale Ajao

Theses and Dissertations

Streamflow predictions are important in planning water resources and effective hydrological management. Physically based models such as the Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) have been used in the past for this purpose. Still, the use of machine learning models such as Long Short-Term Memory (LSTM) has been proven to complement the use of traditional models. This study compares the reliability performances of HEC-HMS and LSTM models to predict the streamflow of Goose River Watershed in North Dakota. The objective of the research is to perform a comprehensive comparative analysis between the performance of HEC-HMS and LSTM models to predict …