Digital Commons Network^™

High-Fidelity Surface And Environment Simulation Using Immersive Virtual Reality For Lunar Analog Training, Shriya Pedaparthi

Theses and Dissertations

The study explores the integration of high-fidelity Virtual Reality (VR) into astronaut training for lunar analog missions. A realistic VR simulation was developed to represent lunar terrain, allowing participants to perform critical tasks under simulated lunar conditions. Specifically, participants navigated from a compromised lunar habitat (ILMAH) facing a pressure breach, to a secure facility, testing their ability to respond effectively to emergency scenarios. Participants underwent three sequential trials to assess how VR and physical constraints influence gait and performance: (1) a baseline trial measuring natural gait without equipment; (2) a trial incorporating a real spacesuit and lunar gravity simulated through …

Nutrition Implications In Hypermobile Ehlers-Danlos Syndrome (Heds)/Hypermobility Spectrum Disorder (Hsd), Lauren Steiner

Theses and Dissertations

Hypermobile Ehlers-Danlos syndrome (hEDS) and hypermobility spectrum disorders (HSD) are a poorly recognized and under researched group of genetic connective tissue disorders that have widespread impacts on the human body, including gastrointestinal (GI) symptoms. The role of dietary and supplemental interventions in GI symptom control in this patient population has not been researched. This study used an exploratory survey to collect data on diets and supplements that the patient population has used to combat GI symptoms. The low histamine, gluten free, dairy free, anti-inflammatory, and intermittent fasting diets, as well as magnesium, probiotic, coenzyme Q10, vitamin C, vitamin B12, and …

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 …

Adaptblur: Adaptive Linear Filter For Enhanced Deep Learning Classification Performance, Ganesha Thondilege

Theses and Dissertations

Image preprocessing is crucial in deep learning models for high performance and accuracy. This study implements AdaptBlur, a dynamic linear filter developed from a second-order partial differential equation using finite difference approximations, which enhances image quality while preserving the image structure with dynamic parameters that are optimized through the Nelder-Mead optimization, minimizing mean square error to improve the effectiveness of the filter. Moreover, the study evaluates the impact of the results on model performance on deep learning classification using publicly available datasets. Experimentally, image classifiers trained on preprocessed data with the AdaptBlur filter perform much better than those trained without …

Identifying The Common Patterns Or Trends That Emerge When Analyzing Past Accidents And Incidents Involving Autopilot Systems, Christopher David Tracy

Theses and Dissertations

This study investigated to what extent over-reliance on automation, particularly autopilot systems, contributed to incidents and accidents in commercial aviation. Despite advancements in automated technologies, there is a growing concern regarding the potential consequences of pilots’ dependency on these systems. This research analyzed past key incidents to identify patterns indicating that pilots may have been inadequately prepared to assume manual control during automation failures. This study employed a qualitative approach, including semi-structured interviews with aviation professionals such as airline flight instructors, line check pilots, flight standards evaluators, and an FAA aviation safety inspector, along with qualitative surveys with professional pilots. …

Forceful Functors: A Categorical Approach To Constraint Monitoring In Machine Learning Models, Jonathan Wirkkala

Theses and Dissertations

Often times in machine learning there are several heuristic choices that one makes during model selection, training, and validation. These choices include the type of training used, the width and depth of the model, type activation function and many more. These choices are general rules of thumb and best practices when creating a machine learning algorithm to achieve acceptable results. For example, in the case of image processing, this may mean determining whether or not a given image contains a tumor. Decisions made during the design process create several variations of machine learning algorithms, all with various properties with pros …

Genetic Epidemiology Of Chronic Wasting Disease And Epizootic Hemorrhagic Disease In North Dakota Deer, Ethan S. Baker

Theses and Dissertations

Wildlife diseases have become a critical factor in the management of animal populations across the globe. Such diseases can compromise individual health, reduce population sizes, and disrupt ecosystem biodiversity. As a result, there can be a loss in recreational opportunities which, in turn, can cause economic losses for communities relying on these populations. Effective wildlife disease management not only requires the ability to respond to outbreaks but also the capacity to predict how diseases interact with populations and ecosystems. Due to the complexity of disease dynamics, a multidisciplinary approach is essential for gaining a comprehensive understanding of these systems. In …

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 …

Precipitation Forecast And Verification For Suas Applications, Patrick Britt

Theses and Dissertations

Small Unmanned Aerial Systems (sUAS) have become a fast-growing part of air traffic in the United States. This significant growth is due to the numerous uses these systems can provide, both recreationally and professionally. Due to the small nature of the sUAS, any weather, regardless of intensity, plays a vital role in flight operations and planning. In a survey of sUAS pilots, it was found that precipitation was the most significant hazard of concern, and the most time-sensitive hazard, as precipitation conditions are most often checked by operators in the immediate moments before flight. This project aimed to create, analyze, …

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 …

An Exploratory Investigation Of The Impact Of Psychological Intimate Partner Violence On College Women: A Qualitative Study, Dana Juel Conzemius-Schindler

Theses and Dissertations

Researchers have found psychological intimate partner violence (P-IPV; defined as emotional and verbal abuse utilized to degrade, demean, create fear, control, or isolate; Tolman, 1989; Sullivan et al., 2012) is detrimental to mental health functioning, including increased sexual risk behaviors, depressive and anxious symptomology, and relationship dissatisfaction (Hellemans et al., 2015; Overstreet et al., 2015). Despite this, little is known regarding the academic and psychological lived experiences of survivors of P-IPV. Therefore, the current study sought to qualitatively explore the lived experiences of female-identified students exposed to psychological intimate partner violence while in college. Through a Consensual Qualitative Research (CQR; …

Religion-Justified Childhood Maltreatment, Maladjustment, And Child Abuse Potential, Hannah Doctor

Theses and Dissertations

Childhood abuse is a widely studied construct that has been shown to be related to higher levels of maladjustment and physical discipline and abuse perpetration in adulthood. Religion has been studied in relation to traumatic experiences and shown to be a factor that may help mitigate subsequent maladjustment. The idea religion may have been used to justify abusive acts has not been as widely studied but may complicate the picture of religion being a protective or resiliency factor. The present study sought to explore the relationships between religion, childhood abuse, maladjustment, and parenting behaviors. It was hypothesized that religion being …

The Effects Of Chronic Sleep Deprivation On Visuomotor Performance Using Electroencephalographic Measurement, Jaxon Duane Erie

Theses and Dissertations

The present study investigated the impact of acute and chronic sleep deprivation on visuomotor performance using both electroencephalographic (EEG) and behavioral measures (Senaptec Sensory Station) in a sample of 43 college students aged 18 to 27. Participants were assigned to low or high sleep conditions based on Chronic Sleep Reduction Questionnaire (CSRQ) scores, while acute sleep deprivation was assessed via the Karolinska Sleepiness Scale (KSS). Heart rate variability (HRV) was recorded to support condition placement, but comparisons revealed no significant differences between groups. No significant differences were found in visuomotor control or eye-quickness assessments. However, visual clarity was significantly better …

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 …

Adhd Research And Practice: An Evaluation Of Psychologists’ Utilizations Of Adhd Assessments In Practice, Desiree Giesen

Theses and Dissertations

The incidence of first-time Attention-Deficit/Hyperactivity Disorder (ADHD) diagnoses among adults has been on the rise. There is limited research on effective practices for evaluating adult ADHD, with previous studies showing conflicting results regarding the effectiveness of various assessment measures. The current study investigates the assessment tools chosen by psychologists and their perceived importance in evaluating ADHD. A cross-sectional design was used with 200 participants who were primarily licensed psychologists. The unstructured clinical interview with the client was the most used assessment tool and was rated as having the highest importance, whereas continuous performance tasks were rated as having the lowest …

Laboratory Application Of An Aircraft Particle Imaging Probe To Characterize Levitated Ice Crystals And Their Aerodynamic Drag, Cheyenne Phoenix Harrison

Theses and Dissertations

Ice crystals in the upper atmosphere range in size from a few nanometers to a few millimeters, creating potential damage to vehicles traveling at hypersonic speeds; this problem has not yet been investigated with controlled laboratory techniques. This thesis investigates ice crystal impacts on high-speed flight vehicles and their aerodynamics by exploring a new method to combine ice crystal and shock wave experimental apparatuses to achieve experiments of observing ice crystals and shock waves interacting. The objectives of this research are: (1) to consistently produce levitated ice crystals in a setup that can feasibly release the ice crystals into a …

Rethinking Pilot Retention In The United States: An Analysis Of Key Factors, Michael James Hickey

Theses and Dissertations

This thesis examined pilot retention challenges in U.S. regional and low-cost carriers (LCCs), focusing on nonfinancial incentives such as quality of life, career stability, and work-life balance, which may have a greater influence on retention than traditional financial incentives. This quantitative, survey-based approach assesses how pilots rank the factors that influence their retention. Using a sample of U.S.-based pilots, the study examines six key areas adapted from a European pilot retention framework. Statistical analyses, including the Friedman test, the Mann-Whitney U test, and the Kruskal-Wallis test, identified correlations between demographic variables and retention priorities. The inherent financial constraints of regional …

Examining A Year One Sor Implementation: A Mixed-Method Study Of Teacher Experiences And Student Literacy Scores, Christine Litzinger

Theses and Dissertations

With increasing national and legislative mandates prioritizing SoR practices, many schools are shifting their literacy practices to align classroom instruction, interventions, and screening to follow reading research, which can require a shift in pedagogy for individual educators and schools. This exploratory sequential mixed-methods study explored a year one implementation of the Science of Reading (SoR) in a mid-size midwestern school district during their first year of across-district literacy reform. Qualitative case study interviews were conducted of K-3 Classroom teachers (4) and literacy coaches (4). Emergent themes from the findings included value in high fidelity professional development, challenges related to resource …

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 …

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 …

The Effect Of Salaciousness, Consistency, And Timing Of Disclosure On Alibi Believability In The Eyes Of A Jury, Jasper Allen Schmidtwood

Theses and Dissertations

Past research indicates a prevalent distrust of alibi evidence, coined by Olson and Wells (2004) as the alibi skepticism hypothesis. This inherent distrust prompts inquiries into the factors that enhance or undermine the credibility of alibi evidence in a trial. Utilizing attribution theory (Allison et al., 2012; Weiner, 2010), this study investigates the elements contributing to the believability of alibi statements, specifically the impact of alibi consistency, timing of disclosure, and the salaciousness of the alibi statement on jurors' perceptions of the defendant's character. Participants were randomly assigned to one of twelve conditions and read a mock trial summary that …

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 …

Walk This Way: Effects Of Eyewitness Identification Factors And The Featural Justification Effect On Mock-Juror Decision-Making, Lauren Nicole Stornelli

Theses and Dissertations

Surveillance cameras serve many purposes, including security, monitoring, and investigating crimes. The presence of surveillance cameras allows for a new form of witness: a non-eyewitness, where crimes are captured by surveillance cameras without a physical witness present (Pezdek & Lerer, 2023a). As such, police officers are acting as eyewitnesses by identifying the perpetrator from the surveillance evidence and testifying about their identification at trial (Rumschik et al., 2020). Previous studies have examined participants’ ability to accurately match previously viewed faces with faces on surveillance evidence, with results suggesting accuracy rates around chance (e.g., Bruce et al., 2001; White et al., …

Advancing Human-Computer Interaction Systems Through Explainable And Secure Ai Integration, Ifiok Udoidiok

Theses and Dissertations

As artificial intelligence (AI) systems increasingly shape how humans interact with digital environments, the need for transparency, security, and robustness in intelligent decision making has become critical. This thesis explores how explainable and secure AI techniques can be integrated into modern human-computer interaction (HCI) systems to enhance trust, resilience, and alignment with human operators.

We present three related studies, each addressing a distinct challenge in the design of human-centered AI. First, we apply XAI methods, specifically Local Interpretable Model-Agnostic Explanations (LIME), to deep learning (DL) based CAPTCHA solvers. By interpreting model attention patterns, we uncover exploitable weaknesses in text CAPTCHA …

Mindfulness And Modification Therapy (Mmt) Group Feasibility And Acceptability Among Prison Residents With Dysregulated Behaviors, Leslie Unger

Theses and Dissertations

Mindfulness and Modification Therapy (MMT; Wupperman, 2019) is a transdiagnostic therapy that systematically integrates aspects of six empirically supported treatments for impulsive and dysregulated behavior. As such, MMT may offer an efficient approach to addressing a variety of dysregulated behaviors, thereby supporting increased safety within carceral settings and enhancing goals of rehabilitation. To date, MMT has demonstrated positive results in community settings when treating substance misuse and anger/aggression, but it has not yet been examined in a prison setting. The present research examines the feasibility and acceptability of using a 14-session version of group MMT as a voluntary treatment option …

Targeted Coaching In The Detroit Promise Path: A Thematic Network Analysis Of Current Challenges And Opportunities For Student Success, Maryse Danielle Wilson

Theses and Dissertations

The Detroit Promise Program is one of the many college promise programs operating within the United States that offers full college tuition coverage to students within the city who meet certain residential criteria. Detroit’s population has one of the highest proportions of Black and first-generation students and the lowest average socioeconomic class in the country. From the time of the Promise Program’s launch until now it has seen minor improvements in college degree competition rates, but this rate is still low compared to the national average. The Detroit Promise Path, which is an off branch of the Detroit Promise Program, …