Digital Commons Network^™

Gender-Based Perceptions Of Confronting Prejudice In The Classroom, Mary Hamilton

Theses and Dissertations

Disparities exist between men and women in academia at the faculty and student level. Academically, women are judged as being weaker and inferior, and many describe experiences of sexism, often within the classroom setting. Few studies have investigated the impact of an instructor confronting sexism in the classroom. The current study examined the effects of an instructor’s gender, student’s gender, and instructor’s confrontation decision on students’ perceptions of the instructor, classroom environment, and the moderating effect of self-reported sexism. Participants read one of four vignettes describing an act of sexism in the classroom where a male (or female) instructor confronts …

Enhancing Green Hydrogen Integration In Distributed Energy Systems, Solomon Evro

Theses and Dissertations

This study investigates strategic integration of green hydrogen into Distributed Energy Systems (DES) as a means of addressing three closely related challenges: first, uncertainties in hydrogen supply due to renewables intermittency; second, non-existence of practical, scalable modeling solutions for early-phase DES planning involving Alkaline Water Electrolyzers; and third, a lack of sufficient policy frameworks facilitating mass deployment. Existing hydrogen production models are often too complex for effective use in DES and do not relate stack number, input power, and renewable resource fluctuation. To address this limitation, the paper introduces a new probabilistic electrolyzer sizing method based on cumulative distribution function …

Exploring Geothermal Energy Development In The Deep Reservoirs Of The Williston Basin: An Integrated Analysis Using Empirical, Probabilistic, Numerical Simulation And Machine Learning Techniques, Emmanuel Gyimah

Theses and Dissertations

Geothermal energy, a renewable, clean, and abundant energy source, is gaining global attention as a key contributor to the transition towards a low-carbon economy. However, uncertainties in reservoir characterization and development risks hinder its widespread adoption, particularly in the Williston Basin. This study focuses on the Williston Basin, particularly the Red River and Deadwood formations, to explore the potential of deep geothermal reservoirs in North Dakota. The study integrates a multi-disciplinary technique in empirical, probabilistic, numerical simulation, and machine learning to reduce uncertainties and risks associated with geothermal energy exploration and development. Probabilistic methods (Parametric and Monte Carlo), incorporating geo-statistics, …

Inorganic Arsenite [I-As (Iii)] Represses Human Renal Progenitor Cell Characteristics And Induces Neoplastic-Like Transformation, Md Ehsanul Haque

Theses and Dissertations

Studies on populations exposed to inorganic arsenic (iAs) have shown an association between this particular exposure and the development of chronic kidney disease (CKD) and renal cell carcinoma (RCC). However, there are few studies addressing how acute exposure of the human kidney to iAs might lead to long-term alterations that might lead to CKD or RCC. This study’s hypothesis is that renal exposure to iAs might alter the renal cells responsible for the repair and regeneration of nephrons damaged by iAs exposure or other renal toxicants. The kidney possesses a minority epithelial cell population that co-express PROM1 and CD24 that …

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 …

Belongingness And Science Identity Of Underrepresented Students In Aerospace Sciences, Bella Hettich

Theses and Dissertations

Despite efforts to support underrepresented individuals—specifically those from racial, ethnic, and gender minority groups—they continue to face unique challenges that affect their belongingness in aerospace sciences, leading to issues with retention in educational programs and subsequent professional pathways. Such hindrances to personal achievement can also impede broader organizational goals. Addressing these challenges is critical, as supporting the success of underrepresented individuals fosters diverse perspectives, which are essential for driving innovation and maximizing organizational productivity. Just as importantly, ensuring that every individual, regardless of background, has access to opportunities and the support needed to succeed fulfills an ethical obligation. Upholding the …

Photometric Analysis Of Four Near-Earth Asteroids With A Convex Shape Model Of (25330) 1999 Kv4, Lucas James Hutton

Theses and Dissertations

Astrometric and photometric observations of asteroids provide information regarding their positions, rotation rates, axis of rotation, and shapes. Lightcurve inversion utilizes an asteroid’s change in brightness with respect to phase angle change, which maximizes ground-based observational data. This study investigated the rotational properties of four near-Earth asteroids (NEAs) with a single pole solution and convex shape model of (25330) 1999 KV4 using the lightcurve inversion method. Photometric observations were remotely obtained using the Skynet Robotic Telescope Network, andNOIRLAB’s Cerro-Tololo Inter-American Observatory’s (CTIO) 24” Ritchey-Chretien Prompt 3 Telescope. The data were calibrated using AstroImageJ software, and lightcurve analyses were performed using …

Nanoscale Frictional Properties Of Two-Dimensional Snse And Snse2 With Lateral Force Microscopy, Thomas Iken

Theses and Dissertations

In this study, we employed an atomic force microscopy-based lateral force microscopy technique to examine the nanoscale frictional characteristics of 2D SnSe and SnSe2 layers, and we compared these results with those of graphene, a commonly used solid lubricant. Our results revealed that both SnSe and SnSe2 layers exhibited superior lubricative performance compared to graphene with similar thicknesses. Experimental results were further substantiated by extensive Density Functional Theory calculations to understand the observed frictional properties of these materials.

Cisplatin-Induced Nephrotoxicity And Adaptive Responses In Renal Progenitor Cells: Molecular Insights From Transcriptomic And Proteomic Analyses, Eloho Ighofose

Theses and Dissertations

Cisplatin is a widely used chemotherapeutic agent known for its efficacy against various solid tumors, but its clinical utility is limited by dose-dependent nephrotoxicity. The renal proximal tubule, particularly its epithelial cell population, is highly susceptible to cisplatin-induced injury due to its role in solute transport and high metabolic activity. Recent advances suggest that renal progenitor cells play a key role in epithelial repair following nephrotoxic injury; however, the molecular mechanisms underlying their response to cisplatin remain poorly understood.This study investigates the impact of both acute and chronic cisplatin exposure on immortalized human renal progenitor cells (HRTPT, CD24⁺/CD133⁺) using a …

Hybrid Energy Storage Systems For Renewable Integration: Combining Batteries, Supercapacitors, And Flywheels, Tanwa Morohunkeji Iwayemi

Theses and Dissertations

Renewable energy integration into existing power grids is crucial for a sustainable future, but its intermittency poses technical challenges to grid stability and reliability. Hybrid Energy Storage Systems (HESS), combining lithium-ion batteries, supercapacitors, and flywheels, offer a promising solution by leveraging the complementary strengths of these technologies. This study explores optimal configurations of HESS using HOMER Pro software and a theoretical analysis approach to establish unified mathematical models for the three storages with constraints to address various operational scenarios, including normal operation, absence of renewable sources, and component failures. The proposed system integrates an Energy Management System (EMS) using a …

The Wicked Problem Of Moral Distress: Exploring The Experiences Of Rural Clinic Nurses, Sydney Rae Johnson

Theses and Dissertations

Background: Moral distress is an occupational hazard for nurses that can negatively impact nurses, patients, and the healthcare system. Moral distress has been well documented in high-risk care environments. Each nursing care environment has its own unique triggers for moral distress, but these triggers are unknown in rural clinic nurses. Design and Purpose: This convergent mixed methods study sought to gain a broader understanding of moral distress in nurses working in rural clinic settings.

Methods: Convergent mixed methodology was used to gain a broader understanding of moral distress in nurses working in rural clinic settings. Following ethical approvals, informed by …

Thermally Induced Evolution Of The Cement Microannulus In Co2 Injection Wells, Jawad Ali Khan

Theses and Dissertations

Ensuring wellbore integrity during CO₂ injection is a critical challenge in Carbon Capture and Storage (CCS), as failures at the casing-cement and cement-formation interfaces can create potential leakage pathways. This dissertation presents a multi-scale, physics-based investigation into well integrity risks, integrating finite element analysis (FEA), thermal-mechanical-poroelastic modeling, and transient stress analysis to evaluate cement sheath stability, fracture-driven stress localization, and microannulus formation under various CCS conditions.

A key novelty of this research is the development of a fully coupled thermal-mechanical-poroelastic FEA framework using COMSOL Multiphysics, a renowned industry-standard software for multiphysics simulations. This model enables a dynamic, time-dependent assessment …

A Federated Learning Solution For Secure And Scalable Edge Computing In Distributed Environments, Muhammad Hamza Karim

Theses and Dissertations

The growing penetration of Distributed Energy Resources (DERs) into the modern power system has introduced significant challenges related to data volume and cybersecurity. Centralized approaches struggle to process the large volume of data generated by inverters or other DER-related assets securely and efficiently. This problem raise concerns about the confidentiality, integrity, availability, and accountability (CIAA) properties of DER assets. Moreover, the large deployment of Internet of Things (IoT) and edge computing devices has introduced new security vulnerabilities. Malicious actors can exploit resource-constrained edge devices for unauthorized activities and resource consumption, threatening the performance and operational capabilities of the edge infrastructure. …

The Effect Of Metallothionein-3 On Global Gene Expression And Transcriptome Of Kidney Progenitor And Urothelial Cells, Julia Kochanowski

Theses and Dissertations

Metallothioneins (MT) are low molecular weight, cysteine-rich, metal-binding proteins that protect against metal toxicity. MTs have several functions, such as transport of metals, detoxification of metals, and protection from metal toxicity. MT-3, first called growth inhibitory factor, was originally discovered as the Alzheimer’s disease gene. MT-3 has a unique structure with 7 additional amino acids. The role of MT-3 is unknown. Some studies suggest MT-3 plays a role in the immune system and with cisplatin resistance. RPTEC/TERT1 cell line is an immortalized cell line from the human proximal tubule of an adult kidney. It was determined that RPTEC/TERT1 cultures consisted …

A Qualitative Study Exploring Best Practices And Applications Of Green, Eco, And Environmental Social Work In Canadian Social Work Practice, Ryley Kristanne Kowalski

Theses and Dissertations

Humanity and society are deeply connected to nature and the environment at their core. Through processes of colonization, the Industrial Revolution, urbanization, consumerism, and capitalism, people and societies have become increasingly disconnected from the natural environment. Introduced as a helping profession through the Industrial Revolution, social work began rooted in environment but quickly changed to understand human and societal wellbeing through the narrow scope of the social environment through the person-in-environment approach. Modern day issues of climate change, environmental degradation, environmental racism, and environmental justice movements have necessitated social work’s increased understanding of the natural environment. The purpose of this …

The Role Of Student Loan Debt On Delayed Homeownership Among Black American College Graduates, Dedan Makongoro Kusaga

Theses and Dissertations

The growing burden of student loan debt in the United States has raised significant concerns about its broader social and economic impacts, particularly on young adults’ ability to achieve financial milestones such as homeownership. Black American college graduates are especially affected, often carrying higher loan balances and facing greater financial barriers due to historical and structural inequalities. This quantitative study examined the role of student loan debt and other factors influencing delayed homeownership among Black American college graduates, using the public-use Baccalaureate and Beyond (B&B: 2008/2018) dataset from the National Center for Education Statistics (NCES). Findings indicated student loan debt, …

Thresholds In Modular Lattices, Daniel Atta Kwakye

Theses and Dissertations

This study investigates threshold phenomena in infinite modular lattices, extending classical threshold theory beyond Boolean and distributive lattice settings. Specifically, let\(P\) be a finite graded modular lattice with a finite graded modular lattice with rank function \(r: P \rightarrow \mathbb {N}\). By adapting probabilistic combinational methods, notably the methods used by Janson, Łuczak, and Ruciński (2011), we establish rigorously that every monotone property \(F\subseteq P\) possesses a threshold under the chain-uniform random model.Formally, this threshold is characterized by a critical rank \(M^*\), at which the probability \(\mathbb{P}(\Gamma_M\in F)\) transitions sharply from nearly 0 to nearly 1 as the parameter \(M\) …

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 …

Studentification And Off-Campus Housing: A Case Study Of Grand Forks Near-Campus Neighborhoods, Alva Lindstroem

Theses and Dissertations

With national trends in higher education experiencing dwindling enrollments and personal economies increasingly strained, the University of North Dakota (UND) has grown to become the biggest public higher education institution in North Dakota, having effectively bounced back from the COVID-19 pandemic drop in enrollment. Grand Forks, North Dakota, is the host of UND and home to a student body of over 14,000 as of 2023 fall semester. This study focuses on; to what extent is studentification taking place in Grand Forks, ND; and how the observed housing- and demographic patterns in Grand Forks align with, or diverge from, the broader …

From Emily To Loralei To Rory: A Qualitative Textual Analysis Of Scripts From Gilmore Girls For Real-World Application, Erin Mccann

Theses and Dissertations

In the realm of interpersonal communication and intrafamilial research, one dynamic, the mother and daughter pairing, is especially poignant in exploring the ties of closeness, the openness of communication and the potential for long-term impact on a daughter’s development. When studying the mother and daughter dynamic through a work of fiction, patterns can be observed without bias, allowing for evaluation of the strength of relationship and identification of broader implication to the discipline of family communication. In this study, a textual analysis was conducted evaluating 21 exemplary episodes of the 2000s television show Gilmore Girls focused entirely on the interactions …

Creating Equitable Employment Practices For Adjunct Faculty: Perceptions Of Academic Administrators At Public Institutions In A Great Plains State, Constance Mciver

Theses and Dissertations

Adjunct faculty are a substantial feature of the higher education classroom. Their increased prevalence has contributed to elevated concerns regarding the employment practices of these part-time faculty. While numerous published accounts of adjunct faculty experiences are available, recorded perceptions of academic administrators are less prevalent. Eighty-six academic administrators from six public universities in a Great Plains state participated in a researcher-developed survey to determine the expectations placed upon and compensation practices for adjunct faculty, as well as perceptions of the strengths and weaknesses of the adjunct system and the feasibility of providing more equitable compensation. Survey findings suggest there is …

Analysis Of Job Satisfaction Factors Influencing Pilot Retention In The United States Coast Guard, Margaret Morgan

Theses and Dissertations

United States Coast Guard (USCG) aviation is facing increasing challenges in pilot retention. A survey was designed to explore job satisfaction constructs and pilots’ intention to separate from the USCG to determine how gender, airframe, and retirement plan influence retention. The survey was distributed to Active Duty USCG pilots with 183 valid responses. Statistical analysis for job satisfaction found that female pilots are less satisfied with work-life balance. Differences between gender were not significant for the other job satisfaction constructs or intention to separate from the USCG. The analysis found that fixed wing pilots have a higher intention to separate …

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 …

Why Can't We Just Be: Native American College Student Sense Of Belonging At The University Of North Dakota, Gavin Michael Nadeau

Theses and Dissertations

Sense of belonging is a primary indicator of retention and persistence to graduation forNative American college students. Though more than doubling in the past 30 years, Native American college student enrollment has decreased since 2010 (197,000 in 2010 to 107,000 in 2021) (PNPI, 2021; NCES, n.d.). In 2020, Native American students’ 2nd year retention rate was more than 20% lower than their white peers at the University of North Dakota (UND, 2020). When college students of color feel like they belong, they are more likely to retain, persist, and graduate (Mowreader, 2024; Hurtado & Carter, 1997; Hurtado et al., 1999). …

Seismic Design And Ductility Evaluation Of Concrete-Filled Thin-Walled Steel Tubular Columns Modeling As Bridge Piers, Njiru Mwaura

Theses and Dissertations

Accurate numerical modeling is essential for evaluating the seismic performance and load-bearing behavior of partially concrete-filled thin-walled steel tubular columns, particularly those used as bridge piers under complex seismic conditions. This study investigates the performance of such columns enhanced with embedded energy-dissipating shell plates and/or partial concrete infill, subjected to unidirectional and bidirectional seismic loading. A validated finite element model (FEM), developed in ABAQUS and incorporating geometric and material nonlinearities—including the modified Two-Surface Model (2SM)—was employed to simulate cyclic behavior and predict structural response.The model was benchmarked against experimental results and used to analyze a broad range of parameters, including …

Investigating The Role Of Keratin 6 And Sox2 In Regulating Growth, Stemness, Basal/Squamous Expression, And Chemotherapy Response In Muscle-Invasive Urothelial Carcinoma, Nelofar Nargis

Theses and Dissertations

Urothelial carcinoma (UC) is a prevalent and aggressive malignancy arising in urothelial cells, with arsenic exposure recognized as a significant environmental risk factor. It is categorized into two primary subtypes based on the extent of cancer progression beyond the bladder’s muscle wall: non-muscle-invasive urothelial carcinoma (NMIUC) and muscle-invasive urothelial carcinoma (MIUC). While NMIUC is associated with a relatively favorable prognosis, progression to MIUC is more aggressive and leads to significantly worse outcomes, including poor treatment response and increased metastasis. Squamous differentiation (SD) in UC is an emerging hallmark of aggressive UC, with patients often having poor prognoses and developing chemoresistance, …

Evaluating Human Factors In Isolation And Confinement During Analog Spaceflight: A Decadal Survey Assessing Ilmah Crew Psychology, Travis Michael Nelson

Theses and Dissertations

This study examined 13 crews participating in analog Martian surface simulations to investigate psychological experiences within the first collegiate planetary surface habitat. The University of North Dakota (UND) Integrated Lunar-Martian Analog Habitat (ILMAH) was utilized with high-performing participant crews (n=42) who were recognized and recruited for their skills. Common environmental similarities that each crew faced included isolation, confinement, time-latent communications, demanding work hours, monotonous tasks, physically strenuous Extravehicular Activities (EVA), personal psychological adaptations, and interpersonal psychosocial challenges. The primary objective of this study was to evaluate self-appraised crew performance measures across continuous phases of isolation and confinement lasting up to …

When Fomo Meets The Keg: A Descriptive Case Study Of Binge Drinking In First-Year College Students At The University Of North Dakota, Angie Novak

Theses and Dissertations

Binge drinking among first-year college students is a persistent public health and academic issue, particularly during the transition to higher education. As students gain independence and navigate peer influence and campus norms, many perceive alcohol use as a central part of the college experience. This descriptive case study investigates the personal, environmental, and behavioral factors contributing to binge drinking among first-year students at the University of North Dakota (UND).The study, guided by Social Cognitive Theory (SCT), explored how students adopt and reinforce drinking behaviors through peer modeling, social expectations, and institutional culture. Qualitative data was collected through individual interviews with …

Investigation Of Surfactant-Enhanced Oil Recovery In High Salinity And High Temperature (Hsht) Reservoir Conditions: A Case Study In The Bakken Formation, Tomiwa Isaac Oguntade

Theses and Dissertations

This study investigates improved strategies for enhancing oil recovery (EOR) in challenging reservoir conditions by combining chemical surfactant flooding and data-driven optimization techniques. Given rising global energy demand and the depletion of conventional oil reserves, chemical EOR methods, particularly surfactant flooding, are gaining popularity for their ability to mobilize residual oil via mechanisms such as reducing interfacial tension, altering wettability, and inhibiting asphaltene formation. The research begins by examining the effectiveness of surfactant applications across various reservoir conditions, emphasizing the need for surfactants capable of withstanding challenging environments characterized by high temperatures, high salinity, and low permeability. Laboratory experiments demonstrated …

Evaluating The Engineering Properties Of Waste-Modified Asphalt Binders And Mixtures As Inputs For The Mechanistic-Empirical Pavement Design, Duncan Rioba Oteki

Theses and Dissertations

Pavements are essential for economic development and mobility, with asphalt dominating the US road network due to its cost-effectiveness, ease of maintenance, and recyclability. However, the environmental impacts of asphalt production and the depletion of virgin materials have driven the integration of waste products into asphalt mixtures to improve sustainability. This study evaluated the engineering properties of waste-modified asphalt binders and mixtures as performance-based inputs for the Mechanistic-Empirical Pavement Design Guide (MEPDG). The rutting performance of ten asphalt mixtures commonly used in North Dakota was assessed using mechanistic and empirical tests. Mechanistic tests included the dynamic modulus (|E*|), Flow Number …