Digital Commons Network^™

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.

Addressing The Impact Of Unlicensed And Under-Licensed Teachers In Pk-12 Schools: How School Administrators Offer Support, Taylor Topinka

Theses and Dissertations

As the impact of the teacher shortage grows, more teachers are entering classrooms with incomplete teacher licensure. Related literature affirms that new-to-profession teachers experience what Danielson (1999) described as a “sink or swim in the deep end of the pool” culture as they attempt to navigate the beginning of their teaching career with an incomplete license or no license entirely (p. 251). The influx of partially-licensed teachers engaging students is a dilemma created by the growth of the teacher shortage. The purpose of this study was to address the impact of unlicensed and under-licensed teachers on student growth and achievement …

Perceptions Of Emotional Abuse As A Partial Function Of The Abuser-Victim Gender Dyad, Kaitlyn Kidder

Theses and Dissertations

Emotional abuse affects approximately half of people in an intimate relationship, yet it is often not considered intimate partner violence (IPV) on its own (Dokkedahl et al., 2022; Leemis et al., 2022). Despite the prevalence, there is a lack of consistency on the definition of emotional abuse and IPV as well as a lack of clarity of what acts qualify for these terms. Past research has largely focused on IPV, specifically physical or sexual abuse, in heterosexual relationships with a male perpetrator and female victim. Few studies have explored the interactions of the gender of the victim and perpetrator in …

Design And Fabrication Of Tpms-Based Bone Scaffolds: A Cost-Effective Approach Using Plga-Nha And 3d-Printed Pva Molds, Yasser Ahmed

Theses and Dissertations

This thesis introduces a new cost-effective method for fabricating bone scaffolds from triply periodic minimal surface (TPMS) geometries—namely Gyroid and Diamond structure—using a poly(lactic-co-glycolic acid)-nanohydroxyapatite (PLGA-nHA) composite and 3D-printed polyvinyl alcohol (PVA) molds. Current TPMS scaffold fabrication techniques depend on costly laser-based techniques like selective laser sintering and thus remain inaccessible. Herein, we reveal a cost-effective and repeatable indirect approach via fused deposition modeling (FDM) for printing water-soluble PVA molds, which are then iteratively cast filled with a PLGA-nHA solution. The protocol was optimized through concentration modulation and controlled evaporation of the solvent for optimum infiltration and uniformity in the …

Military Recruitment And Retention: A Policy And Practice Analysis, Orly Naum

Theses and Dissertations

The ongoing decline in United States military recruitment and retention presents a growing challenge to sustaining an effective All-Volunteer Force (AVF), particularly within the United States Coast Guard, a branch that has historically been underrepresented in academic research, and across the Department of Defense (DoD). This convergent mixed methods study examined how generational cohorts and individual motivations influence recruitment and retention, integrating quantitative data from the Defense Manpower Data Center (DMDC) and qualitative survey responses from a veteran-rich collegiate population. The quantitative analysis revealed statistically significant differences in Armed Forces Qualification Test (AFQT) scores between Generation Z (GenZ) and Generation …

Ecological Dynamics In Beaver-Engineered Boreal Wetlands: Amphibian Phenology, Occupancy, And Aquatic Macroinvertebrate Communities, Talon Stammen

Theses and Dissertations

Boreal wetlands are ecologically rich yet vulnerable ecosystems shaped by hydrological dynamics, cold climate regimes, and landscape-scale disturbances. Among the most influential agents of change in these systems are beavers (Castor canadensis), whose engineering activities create a mosaic of lentic habitats at varying stages of ecological succession. This dissertation investigates the structure and dynamics of amphibian and aquatic macroinvertebrate communities across a beaver-influenced wetland landscape in Voyageurs National Park, Minnesota, USA.The first study (Chapter II) examines breeding phenology and detection patterns of boreal anurans using a combination of passive acoustic monitoring and visual encounter surveys at 25 wetlands over four …

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 …

Geothermal Sweep Efficiency Enhancement Potential Analysis Using Geological Modeling And Numerical Simulation On Unconventional Deadwood Formation, Ashraf Mohammed

Theses and Dissertations

This study investigates the potential to enhance geothermal sweep efficiency in the fractured, low-permeability Deadwood Formation using a cellulose-based biopolymer and gel treatment. A geological model was developed using well log and structural data from four wells in the Williston Basin and subsequently upscaled into a numerical reservoir simulation in CMG/STARS. Laboratory core-flooding experiments on Deadwood samples were used to calibrate gel behavior under high-temperature (160 °C) and high-salinity (17% TDS) reservoir conditions.Simulation results indicate that a short-duration gel treatment—equivalent to 0.03 pore volumes over one year—can significantly reduce channeling through high-conductivity fractures. The reduction in channeling improves thermal conformance …

The Relationship Between Social Determinants Of Health And Maternal Risk Factors With Severe Maternal Morbidity, Rebecca Smith

Theses and Dissertations

Severe maternal morbidity (SMM) remains a significant public health concern in the United States, with rates rising despite advancements in obstetric care. While extensive research has examined the role of clinical risk factors in SMM, less attention has been given to the influence of social determinants of health (SDOH). Factors such as financial insecurity, food access, housing stability, intimate partner violence, social connectedness, and transportation barriers may contribute to maternal health disparities. This study aims to assess the relationship between SDOH and SMM, evaluating how these non-clinical factors shape maternal health outcomes. Additionally, this research explores the impact of maternal …

The Influence Of Active Galactic Nuclei (Agn) Feedback On Star Formation In Spiral Galaxies, Moreom Akter

Theses and Dissertations

We investigate the influence of Active Galactic Nuclei (AGN) feedback on star formation in spiral galaxies by analyzing a sample of 324 red and 273 blue spiral galaxies from 115 low-redshift galaxy clusters. The multi-wavelength dataset combines optical emission line data from the Sloan Digital Sky Survey (SDSS), X-ray luminosity from the Chandra X-ray & XMM-Newton observatories, and ultraviolet (UV) and infrared (IR) measurements from GALEX and WISE. Using diagnostic emission line ratios, we constructed Baldwin, Phillips, and Terlevich (BPT) diagrams to classify galaxies based on nuclear activity. Our analysis reveals that most of the red spirals have AGNs and …

Get In The Zone: Utilizing A Food Skills Survey To Assess The Education Needs Of A Blue Zones Project Community, Sophia Kathryn Dunlap

Theses and Dissertations

Under-resourced communities often demonstrate little to basic knowledge and skills regarding food and nutrition-related practices, such as cooking and meal planning, nutrition label reading, and gardening. This can be attributed to various factors such as education level, socioeconomic status, available education programs, and overall interest in these topics. Limited research is available discussing the current knowledge, skills, and interests of nutrition topics and healthy eating patterns within Blue Zones Project (BZP) communities. To explore this gap in the literature, a cross-sectional design was implemented via a food skills survey completed by the residents of a modest-sized college town and site …

Attributions Of Blame In Cases Of Stealthing, Shane William Knutson

Theses and Dissertations

Nonconsensual condom removal (NCCR), also known as “stealthing”, is a form of sexual abuse where an individual removes the condom without their sexual partner’s knowledge. While research regarding prevalence of NCCR has been conducted over the past decade, there are still aspects of previous research on other forms of sexual abuse that did not account for cases of NCCR. One such gap in the current literature are studies that investigate how individuals attribute blame to the victims of NCCR. Previous research has shown that there are differences in how individuals attribute blame towards victims of sexual abuse based on different …

White Paper For Faculty Professional Development In Establishing, Addressing, And Informing, To Promote Mental Wellness For Health Careers Students, Betty J. Mcvay

Theses and Dissertations

This research utilized a qualitative case study to explore the need for faculty professional development in the health careers division at a public non-profit California community college, specifically Porterville College. Literature suggests that mental health is a crucial topic to address in contemporary higher education. College students, in general, are facing a notable deterioration in their overall mental well-being, accompanied by an increase in mental disorders. Furthermore, students in health careers programs frequently encounter even more intense stress and psychological challenges, stemming from their constant exposure to high-pressure, emotionally charged situations, and vicarious trauma. Although literature emphasizes the critical need …

Mental Health Stigma Among Latiné Adolescents: Help-Seeking Intentions And Recommendations, Brenda D. Barragan

Theses and Dissertations

Latiné adolescents in the United States face increasing mental health challenges, including elevated rates of depression, suicidal ideation, and emotional distress, particularly in underserved regions such as the Midwest. Despite these needs, Latiné adolescents remain underrepresented in mental health research, particularly with respect to how cultural values and intersecting identities—such as gender, immigrant status, and perceived socioeconomic status—influence stigma and help-seeking behaviors. Grounded in the Theory of Planned Behavior (TPB), this study explored how mental health stigma and cultural factors shape help-seeking intentions and recommendations among 95 self-identified Latiné adolescents in North Dakota and Minnesota. The study examined two primary …

Mixed Method Case Study Of The Silver Program: Nohwi Báyáni Bidádadil’Įį - Watching Over Our Elder, Cameron Ray Smith

Theses and Dissertations

This program effects case study provides a comprehensive case review of Apache Behavioral Health Services (ABHS) Nohwi Báyáni Bidádadil’įį – Watching Over Our Elders (Silver Program). The research aims to understand the program’s effectiveness in identifying, addressing, and reducing Elder abuse/neglect/and exploitation. Assess how the program has used the Elder Abuse Suspicion Index (EASI), assess community partners and ABHS staff knowledge/familiarity with the program, and whether the Silver Program is effective.

To achieve the research aim, I reviewed four data sources: ABHS Electronic Health Record (EHR), ABHS internal survey, interviews with community partners, and artifact review of the Silver Program. …

Visible, Invisible: (Levantine) Arab American Men On Mental Health, Nesreen Jaber

Theses and Dissertations

To address the dearth in psychological research and practice in regards to Arab American men, this study examined the lived experiences of seven Levantine (Belad Al Sham) Arab American men with origins in Palestine, Lebanon, and Iraq. Semi-structured interviews, Interpretive Phenomenological Analysis (IPA), and a Liberation Psychology framework were utilized to explore their definitions of mental health, their experiences of stigma, their experiences with mental health therapy, and their attitudes towards psychology and therapy. A total of seven superordinate themes emerged that highlighted the roles of gendered stigma, cultural incongruence in therapeutic praxis, Eurocentric norms in psychology, and conceptualizations of …

Synthesis And Characterization Of Additive Manufactured Functional Composites For Biomedical Applications, Alexander Thorne

Theses and Dissertations

This dissertation investigates the synthesis and characterization of 3D printed polymer composites, with engineered porosity and both natural and synthetic additives, using fused deposition modeling (FDM) and selective laser sintering (SLS) for potential biomedical applications. The structural, mechanical, tribological, and surface behavior of these composites were evaluated with respect to their suitability for orthopedic load-bearing implants and scaffolds. In the first phase, PEEK-based composites reinforced with 10 or 20 wt% carbon fibers or 20 wt% E-glass fibers were fabricated using FDM with varying infill densities of 30-100% to introduce porosity. Results revealed that loading additives, infill densities, and porosity play …

Doctoral Student Mentoring: A Quantitative Analysis Of Faculty And Student Perceptions And Expectations, Laura Margaret Look

Theses and Dissertations

Doctoral student success is heavily influenced by the quality of mentoring and advising relationships with graduate faculty, yet doctoral student completion rates remain at a low rate of around 50%. The purpose of this quantitative study was to examine the mentoring relationships of doctoral students by surveying doctoral students and graduate faculty who mentor graduate students to identify their expectations for the mentor and mentee in the mentoring relationship. Data were collected from 155 students and 68 faculty in the spring 2024 semester at the University of North Dakota, a Midwest R2 institution. Nonparametric statistical analysis revealed several misalignments between …

Teacher Skills Needed For Effective Participation In Multi-Tiered Systems Of Support (Mtss): A State Framework Analysis, Melissa Osborne

Theses and Dissertations

This study is a secondary data analysis that uses a validated rubric to score the degree of alignment between the teacher skills (TS) necessary for the effective implementation of Multi-Tiered Systems of Support (MTSS) and the preservice teacher training standards (PTS) across five states located in the North Central United States. This investigation also assessed whether states employing an MTSS process to establish special education eligibility for specific learning disabilities (SLD) exhibit higher alignment between TS and PTS compared to states that do not follow that process. Literature outlines the TS needed in an MTSS framework, but there is limited …

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 …

Synthesis And Characterization Of Silicon-Containing Ternary Transition Metal Borides For High Performance Applications, Godswill Ngige

Theses and Dissertations

Binary borides are well known for their exceptional mechanical and thermal properties, including high strength, high melting points, outstanding hardness, and excellent chemical stability, making them suitable for high-temperature structural applications such as components in hypersonic vehicles, jet engines, nose cones, and the leading edges of aircraft. Despite these advantages, they are inherently brittle and suffer from low fracture toughness, limiting their ability to absorb impact or resist crack propagation.

To this end, attention shifted to ternary transition metal borides which are materials composed of a transition metal, boron, and a third element. These ternary compounds exhibit a broader range …

Eco-Friendly Synthesis Of Anemonin From 5-Hydroxymethylfurfural, A Biomass-Derived Starting Material, Diane Zefack Tangmi

Theses and Dissertations

Anemonin, a valuable cyclobutane containing dilactone is a bioactive natural product from Ranunculaceae plants. It holds great potential for applications in pharmaceuticals and materials science. However, traditional synthesis methods are hampered by low yields, toxic reagents, and environmental concerns, limiting its practical use. This study highlights the development of green and scalable synthetic strategies designed to achieve high yields while minimizing environmental impact. Our approach focuses on sustainable methodologies, including optimized steam and fractional distillation performed under mild conditions to reduce waste and energy demands. Protoanemonin’s natural ability to dimerize under mild heating offers a green approach to anemonin synthesis, …

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 …

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). …

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 …

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 …

Mathematical Modeling Of Cyber-Physical Attacks In Iot Systems: An Epidemiological Approach, Tunde Alesinloye

Theses and Dissertations

The Internet of Things (IoT) has made electronic devices more interconnected, which has increased cybersecurity threats while also bringing previously unimaginable convenience. In this study, we explore the dynamics of malware transmission in IoT systems using a mathematical modeling methodology that draws inspiration from epidemiological approaches. To better characterize contemporary cyber-defense tactics like honeypots and proactive device hardening, we specifically suggest the SEIR-DX model, which expands the traditional SEIR framework by adding two extra compartments: Deceptive (D) and Secured (X).

The transitions between the six compartments Susceptible, Exposed, Infected, Recovered, Deceptive, and Secured are described by a system of nonlinear …

Hillslope Degradation: Coarse Sands May Move Faster But Fines Dominate Flux, Robert Chance

Theses and Dissertations

Hillslopes are one of the most pervasive landforms on Earth yet the details of the processes that drive their evolution are not completely understood. Excluding boulders, the majority of mass and volume in soil-mantled hillslopes is composed of sand-sized and finer grains. Understanding the transport rates and governing transport mechanisms of these grains is therefore key to advancing our knowledge of hillslope evolution.This research investigates sand-sized sediment transport through field experiments at 20 sites tracking surface sediment motion and 11 sites measuring depth-dependent transport. These empirical results are compared against outputs from a novel grain-based hillslope diffusion simulation (GBHDS), which …

Experimental And Numerical Modeling For Co2 Utilization In Enhanced Oil Recovery And Associated Storage In Unconventional Reservoirs, Billel Sennaoui

Theses and Dissertations

Unconventional reservoirs, such as the Bakken and Three Forks formations, present significant challenges due to their ultra-low permeability and complex fracture networks, which limit primary oil recovery to less than 10%. To enhance hydrocarbon extraction while simultaneously facilitating carbon dioxide (CO₂) storage, this study investigates the mechanisms governing CO₂ Huff-n-Puff (HnP) and associated storage under various operational conditions. A comprehensive approach integrating experimental analysis, numerical simulations, multiphase flow modeling, and geochemical interactions is employed to optimize CO₂-EOR and storage strategies. The experimental phase focuses on evaluating the performance of different injected gases (CO₂, ethane, and propane) in the Upper Three …

Using Machine Learning To Investigate Weather Impacts On Crop Yield For Probabilistic, Climate-Informed Predictive Crop Breeding, Levi Newell

Theses and Dissertations

As the world’s population continues to grow, the importance of food security willonly continue to increase, with some estimates requiring a global increase in food production between 59 and 98% by 2050. The agriculture industry is also a crucial economic driver, with the industry supporting 20% of the state of North Dakota’s workforce, and with a total valuation of $41.3 billion. The economic importance of this industry and the challenges of future growth prompt a need for data driven decision making into the future, particularly with predictive crop breeding. This is the method by which crops are developed that are …