Digital Commons Network^™

Access To Books For Lower Socioeconomic Students: Creating A Book Sharing Intervention, Laura Fernandez

Theses and Dissertations

Lack of access to books has a lasting effect on children. The home literacy environment of a child impacts their emergent literacy skills, and later the level of literacy with which the child enters kindergarten. Children from lower socio-economic environments are more likely to enter kindergarten behind their peers due to factors such as: less access to books in their home due to poverty and having family members that work multiple jobs and have less time to spend reading with their children. Shared reading between a caregiver and a child is an integral piece of emergent literacy that can start …

Applying Systems Engineering Principles To The Design Of Multi-Channel Functional Electrical Stimulator, Yasser Ayeva

Theses and Dissertations

Paralyzed patients due to spinal cord injuries or other injuries can produce functional movements with the help of functional electrical stimulation (FES). Electrical discharges are applied to the patient's muscles to help with specific movements like walking, standing, and holding and grasping objects (Cleveland Clinic,2023). FES is not a novel technology, in fact, the term FES was not used until 1967 when Moe and Post created it. (Moe & Post, 1962). This technology has been around, and a wide range of devices utilizing it are currently on the market to support patients' treatment and rehabilitation all over the world. As …

Black Lives Matter: Protesting As A Form Of Communication, Tiffany Tara Sonterre

Theses and Dissertations

On May 25, 2020 in Minneapolis, Minnesota, Officer Derek Chauvin knelt on the neck of George Floyd for 9 minutes and 29 seconds, resulting in Floyd’s death; protests and riots broke out not only in Minnesota, but around the United States (Taylor, 2021). This was just the most recent event in the repeated police brutality against people of color. This dissertation is a case study examining protesting as a form of communication in regards to the Black Lives Matter movement. The deaths of 15 Black people which generated notable media attention are examined via a variety of news sources, starting …

Vehicle Crashes In Minnesota: Spatial And Temporal Patterns And Contributing Factors To Crash Severity, Bastien Koralalage Pavithra Navodi Rodrigo

Theses and Dissertations

Vehicle crashes represent a critical global issue, resulting in numerous fatalities, injuries, and significant economic and societal impacts. In response, government officials worldwide are developing strategies and policies to enhance road safety and promote sustainable transportation systems, aiming for zero fatalities and injuries. Understanding the causes of crashes is essential for these efforts. This study focuses on identifying spatial and temporal patterns and contributing factors for the crash severity of vehicle crashes in Minnesota. Spatial distribution of crash hotspots is identified and visualized using spatial autocorrelation (global Moran I), hotspot analysis (Getis–Ord Gi*), and kernel density estimation in ArcGIS Pro. …

Restoring The Occupational Therapy Spirit In Hand Therapy Practice, Karrianna Iseminger

Theses and Dissertations

The dominant role psychosocial factors play in physical healing and disability perceptions of individuals with upper extremity (UE) conditions has been documented repeatedly in the literature for over 40 years. This population is at particular risk given the number of occupations requiring the functional use of one or both UEs for successful performance. However, occupational therapy practitioners (OTPs) specializing in hand therapy do not appear to have a shared practice or understanding of evaluation and intervention for psychosocial factors as they tend to focus mostly on the physical limitations of occupational performance. Therefore, the purpose of this three-article dissertation project …

Nir-Spectroscopy With Data-Driven Application For Inspection And Prediction Of Combined Fouling And Moisture Contamination In Railroad Ballast., Eberechi Orie Ichi

Theses and Dissertations

Ballast contamination is a significant and growing challenge that causes railway track deterioration, poor drainage functionality, and early failure of railroad components. Traditional, human, destructive, field sampling, and most nondestructive evaluation (NDE) inspection methods are ineffective. They are plagued by drawbacks, such as inefficiency, subjective inspection outcome, alteration of existing structures, undermining the stability of the railroad substructure, traffic disruptions, and safety concerns, or providing limited information about the condition of the ballast. Therefore, a reliable noncontact technique is needed to evaluate, characterize, monitor, and predict the presence of contamination in railroad ballast. The conventional contamination indices only account for …

Lstm Application To Mobile Robotics For Stuck Detection, Wilson Lysford

Theses and Dissertations

This paper presents a solution for determining if a wheeled robot is stuck that is operating without high fidelity localization sensors or operating in a sensor denied environment. Expensive sensors are often left off of consumer grade robotics in order to make them more widely available to consumers. This leaves the robot without effective means of perception. Research has shown that LSTM neural networks can provide insight that would normally only be available to a robot fitted with expensive sensor packages such as RTK GPS or LIDAR systems. Specifically, IMU data paired with controller data and wheel odometry data. By …

Advances In Smoke Retrievals Using Lidar: Techniques And Applications, Natalie Midzak

Theses and Dissertations

Smoke aerosols arise from a variety of regional sources and fuel types dependent on the properties of the fire, leading to spatial variability in smoke composition and optical properties. After emission, these aerosols age and mix in the atmosphere with other aerosol species, such as sulfates, altering the optical and microphysical properties of the smoke aerosols over time. Further, smoke particles originating from biomass burning events are typically assumed to be spherical, yet non-spherical smoke particles are also reported from in situ observations. Thus, lidar ratio (extinction to backscatter ratio) and depolarization ratio exhibit spatiotemporal variability for smoke. In this …

Physical Wellness Of The Collegiate Athlete, Richard Michael Morgan

Theses and Dissertations

Wellness among athletes has been studied, but it is still unclear what dimensions make up wellness and where the clinician should focus their efforts. It is known that wellness is a multifaceted definition and has many dimensions. This dissertation will look at the dimension of physical wellness of an athlete pertaining to prevention, return to sport/rehabilitation, and enhancing performance. The purpose of the study is to understand how a clinician may have a direct effect on the physical wellness of the athlete through prevention, intervention or rehabilitation, and performance training. This paper will discuss three different sub-dimensions of physical wellness, …

Continuous Improvement In North Dakota Schools: Impact Of Mtss Essential Tier 1 Components In Red River Valley Education Cooperative Schools Identified For Targeted Or Comprehensive Support And Improvement, Amy Elizabeth Rohlk

Theses and Dissertations

The goal of the continuous improvement process in North Dakota K-12 education is to review and adjust practice to best support student learning. This study considered the continuous improvement services and supports provided by North Dakota Department of Public Instruction (NDDPI), such as providing training and support through regional education cooperatives, adopting the North Dakota multi-tier system of supports (NDMTSS), identifying criteria for low-performing schools under the targeted or comprehensive support and improvement (TSI or CSI) initiative, as well as partnering with Cognia for program improvement tools and school accreditation reviews.The sample population of this study was limited to member …

Pipecolic Acid And Novel Insights Into Cerebral Malaria, Akua E. Mensah

Theses and Dissertations

Cerebral malaria (CM), a severe manifestation of Plasmodium infection, prompts our investigation into the nuanced role of pipecolic acid in its pathophysiology. To unravel the molecular intricacies, we conducted in vitro lysine labeling techniques of mice infected with P. berghei ANKA parasites, and human P. falciparum grown in vitro, aiming to discern the impact of Plasmodium on pipecolic acid production. Previous observations indicated an elevation in pipecolic acid levels correlating with neurological decline in children with CM. In our study, confirming elevated pipecolic acid presence in the plasma and brain tissues of CM patients and the animal model of CM, …

Development Of Chiral Lewis Base Catalysts For Chlorosilane-Mediated Asymmetric C-C Bond Formations, Changgong Xu

Theses and Dissertations

The chiral hydrazine is a crucial structural motif that serves as pivotal structural elements in numerous natural products and biologically significant molecules. We are particularly interested in the catalytic asymmetric reduction of hydrazones, as well as the catalytic asymmetric propargylation and allenylation of hydrazones, because they provide direct pathways to these enantio-enriched chiral building blocks. In this work, we will explore the potential of two different categories of chiral Lewis base catalysts in the said transformations.

Developed by another student in our group, axial-chiral 3,3’-triazolyl biisoquinoline N,N’-dioxides derived catalysts are tested and demonstrated its capability in activating various hydrazone …

4-Channel Spatially Multiplexed Communication System In Single-Core Optical Fibers, Ce Su

Theses and Dissertations

This dissertation delves into exploring and advancing spatial domain / space division multiplexing (SDM) technologies within single-core optical fibers, a frontier in optical fiber communications poised to meet the burgeoning global demand for data transmission. At the heart of this research is the pursuit to significantly enhance the capacity and efficiency of optical fiber communication systems without necessitating additional fiber infrastructure. This work unveils a new paradigm in optical fiber communications characterized by a pioneering 4-channel SDM system through a meticulous process encompassing theoretical modeling, computational simulations, design innovations, and rigorous experimental validations. Theoretical contributions include the development of refined …

Representation Learning For Generative Models With Applications To Healthcare, Astronautics, And Aviation, Van Minh Nguyen

Theses and Dissertations

This dissertation explores applications of representation learning and generative models to challenges in healthcare, astronautics, and aviation.

The first part investigates the use of Generative Adversarial Networks (GANs) to synthesize realistic electronic health record (EHR) data. An initial attempt at training a GAN on the MIMIC-IV dataset encountered stability and convergence issues, motivating a deeper study of 1-Lipschitz regularization techniques for Auxiliary Classifier GANs (AC-GANs). An extensive ablation study on the CIFAR-10 dataset found that Spectral Normalization is key for AC-GAN stability and performance, while Weight Clipping fails to converge without Spectral Normalization. Analysis of the training dynamics provided further …

The Role Of Self In Self-Control Dilemmas: Self-Concept, Conflict, And Self-Conscious Emotions, Jasmina (Mina) Milosevic

Theses and Dissertations

Self-control dilemmas, typically defined as an internal conflict between short-term allurements and long-term goals, are a common feature of everyday life. How such dilemmas are handled is often viewed as a measure of one’s self-control, thus carrying significant implications for an individual. Despite a large body of research that has been amassed on this topic, a complete picture of how self-control dilemmas are processed and resolved still eludes us. In the present research, we bring attention to a largely unexplored aspect of self-control, the role of self-concept in shaping self-control efforts. We combined surveys, hypothetical scenarios, and experience sampling data …

Genetics Of Lrg1 And Its Association With The Cardiometabolic Risk Traits In Mexican American Children And Adolescents, Aaron Rene Reyna

Theses and Dissertations

Leucine-rich alpha-2-glycoprotein 1 (LRG1) has become a major topic of research due to an increasing number of studies demonstrating its unique role in the pathogenesis of multiple human diseases including diabetes and cardiovascular disease. LRG1 has recently been identified as an adipokine, a signaling molecule secreted by adipose tissue. Furthermore, it has been correlated with intercellular signaling that promotes diet-induced hepatosteatosis and insulin resistance in mice. In this study, LRG1 serum concentrations were measured in a family-based cohort of 571 non-diabetic Mexican American children and adolescents aged 6-17 years old (mean age = 11.76 years and females = 48.2%) to …

Foxo4 Impacts Akt In Glioblastoma Multiforme, David Uribe

Theses and Dissertations

Glioblastoma Multiforme (GBM) is an aggressive cancer with patients surviving 13 months on average after diagnosis. The PI3K-PKB/AKT pathway is conserved from flies to mammals. The PI3K signaling pathway aids in the growth and survival of tumor cells. Forkhead box transcription factors subclass O (FOXO1, FOXO3, and FOXO4) act as tumor suppressors in some contexts. In GBM, our group and others showed that FOXO transcription factors drive stem gene expression to promote growth and survival. We disrupted the FOXO4 gene in U87MG cells using CRISPR Cas9 genome editing and performed RNA-seq to identify targets of this …

Development And Application Of Environmental Dna (Edna) Techniques To Detect Rough-Footed And Yellow Mud Turtles: A Seasonal Field Study To Detect Turtle Edna, Sakib Tahmid Rishan

Theses and Dissertations

The application of environmental DNA (eDNA) has improved the ability of humans to detect the existence and geographical distribution of aquatic organisms. The present study highlights the development and application of eDNA techniques to detect rough-footed mud turtles and yellow mud turtles in different areas in Texas. Both mud turtle species were successfully detected in lakes/resacas using direct eDNA sampling techniques. Moreover, passive eDNA sampling techniques were conducted using different membrane filters to detect mud turtle species. The findings indicated that only the mixed cellulose esters (MCE) filter membranes effectively identified eDNA of yellow mud turtles in the fall, but …

Utilizing Nanodiamond For Antiretroviral Drug Delivery To Hiv Infected Microglial Cells, Ebenezer Owusu

Theses and Dissertations

Combination antiretroviral therapy (cART) is widely used to treat HIV infection, but it fails to eradicate viral reservoirs, such as microglia in the brain, leading to HIV-associated neurological disorders (HAND). Advances in nanomedicine have enabled the development of targeted drug delivery systems, and nanodiamonds (NDs) and fluorescent nanodiamonds (FNDs) have emerged as a potential solution due to their biocompatibility, non-toxic nature, and efficiency as drug carriers. Our study builds on previous findings that NDs can cross the blood-brain barrier (BBB), aiming to utilize NDs and FNDs for their added traceability. We propose a multifunctional nanodrug platform that leverages NDs and …

Development Of A More Sustainable High And Ultra-High-Performance Concrete, Enrique Chirino Andalco

Theses and Dissertations

The urgent need to address climate change and environmental damage presents humanity with significant challenges that must be tackled quickly, not acting promptly will result in irreversible consequences, such as extreme weather events, public health risks, and water shortages, among other impacts.

Due to its enormous size and variety of uses, the construction industry is a key factor in addressing the climate challenge. Specifically, concrete as the most used construction material in the world is a good target for developing innovative and Sustainable improvements to reduce environmental impacts.

Using by-products from other industries in concrete manufacturing is a common and …

Electrocatalytic Degradation Of Bisphenol A Using Nickel Sulfide Supported On Graphene Oxide And Cobalt Sulfide Supported On Graphene Oxide Composite Materials, Katherine Ellynn Wright

Theses and Dissertations

The degradation of bisphenol A (BPA) by nickel sulfide supported on graphene oxide (NiS/GO) and cobalt sulfide supported on graphene oxide (CoS/GO) composite materials was investigated. The catalysts were studied to determine the optimal conditions for BPA degradation using electrocatalysis. Electrocatalytic trials were performed using varying parameters, which included electrolyte concentrations of 1.0 g/L, 2.0 g/L, and 4.0 g/L Na2SO4, pHs of 2, 4, and 6, and constant currents of either 0.100 A or 0.200 A. During the reaction samples were taken before the current was applied and 30 minutes and 60 minute intervals to observe the degradation of …

Role Of Interferon-Induced Protein With Tetratricopeptide Repeats 3 (Ifit3) In Hiv-1 Associated Neurodegenerative Disorder And Alzheimer’S Disease, Ranjit Kumar Das

Theses and Dissertations

The advent of cART has revolutionized the management of HIV-1 infection and saved the lives of millions of people worldwide. Yet, HAND continues to be clinically relevant with aging people with HIV-1 (PWH). The underlying mechanism of HAND remains poorly understood. In this regard. Signal transducer and activator of transcription 1(STAT1) and IFIT3 genes have been shown to induce neuroinflammation and neuronal cell death. However, the role of IFIT3 in HAND pathology has not been well established. Therefore, the present work investigated the significant role of IFIT3 gene in development of HAND. In the current study, …

The Impact Of Culture On Firm Performance: A Study On The Effect Of Respect, Teamwork, Innovation, Quality And Integrity On Corporate Profitability, Raphael Mwangi Wambugu

Theses and Dissertations

This thesis investigates the intricate relationship between organizational culture and firm performance, focusing on specific cultural dimensions of respect, teamwork, innovation, quality, and integrity as possible determinants of firm performance. The main objective is to find out the impact of these cultural elements on the dependent variable, return on assets (ROA).

As organizations strive for sustained success and competitive advantage, understanding the interplay between culture and financial performance becomes important. The cultural variable of respect is examined as a catalyst for fostering diverse perspectives and collaborative interactions within the organization. Teamwork is analyzed for …

Machine Learning Predictive Models For Load Identification Of Railroad Bridges Subjected To Train-Induced Vibration, Md Masnun Rahman

Theses and Dissertations

The U.S. rail network is among the world's largest, safest, and most efficient. However, many its railway bridges, which play an essential role in its connectivity, are over 100 years old, showing signs of structural deterioration exceeding their practical service life. The increased weight and speed of modern trains also pose a risk to these bridges. Traditional load identification and monitoring technologies like Weigh-in-Motion (WIM) systems are rarely used on railway bridges due to their cost and practical limits. This thesis explores a cost-effective approach to utilize vibration sensors on railway bridges to identify and predict train load features (speed …

The Impracticality Of Silk, Jo A. Reyes

Theses and Dissertations

In the impracticality of silk, the author examines and critiques the world through poetry and prose poetry, specifically addressing gender, sexuality, relationships, the borderlands, and canonized art as they view it to foment a new understanding and voice during a time of societal and personal shifts. Further complicating the author’s understanding are questions around desire both within reclaimed sensuality and within Audre Lorde’s larger understanding of desire as foundational and necessary in creation and liberation, and Gloria E. Anzaldúa’s use of autohistoria-teoria and her work within borderlands as ways toward reevaluating and reclaiming identity and place in the larger world. …

A Phenomenological Study Of Latina Poets As Leaders At Higher Education Institutions, Rodney Gomez

Theses and Dissertations

This interpretive phenomenological study addresses the underrepresentation of Latinas in higher education leadership roles by focusing on the lived experiences of Latina poets who have served as higher education leaders. Data, collected through semi-structured participant interviews and participant writing samples, was analyzed through a standard method of thematic analysis. Latin American and U.S. theories of decoloniality and Yosso’s community cultural capital guided interpretation of participant experiences. Five themes emerged from the analysis: border negation, foundational values, othered leadership, importance of community, and writing as necessity. Discussion of participation experiences suggests that ways that poetry and creative writing can be used …

Teachers’ Perceptions Of Their Principals’ Leadership Attributes In A Lower Rio Grande Valley (Rgv) School District And The Influence On Their Leaders’ Attributes To Their Self-Efficacy, Arely Rios Tamez

Theses and Dissertations

The purpose of this non-experimental quantitative study is to obtain middle school teachers’ perceptions of their principals’ leadership attributes and analyze how their perceptions of those leadership attributes relate to their sense of self-efficacy. Teacher participants from five middle schools in a lower Rio Grande Valley (RGV) school district in South Texas will be asked to complete two surveys: one survey based on their perceptions of their principals’ leadership attributes (TPPAQ) and another survey measuring teacher efficacy (TEBS-Self). Data analysis using multiple regression will examine if there is a relationship between teacher perceived school leadership attributes of their principals and …

Bayesian Estimation Of Reproduction Numbers From Distributions Of Outbreaks Sizes: Branching Process Approach, Alberta Araba Johnson

Theses and Dissertations

The Generalized Poisson distribution is useful in modeling epidemiological processes as a branching stochastic processes problem. Our goal is to construct accurate and reliable estimators for the reproduction number (R0) (i.e., the number of secondary infections), particularly in the context of disease outbreaks modeled by a Galton-Watson process. Towards this goal, we construct the classical Bayes estimator, the Maximum Likelihood estimator, and the Empirical Bayes (EB) estimator under the Square Error Loss function in Chapter II. We prove that the Empirical Bayes estimator is asymptotically optimal and estimate the rate of convergence. We then proceed to monotonize the Empirical Bayes …

Persistence And Lived Experiences Of Doctoral Students At A Hispanic Serving Institution, Jacob Michael Camacho

Theses and Dissertations

The purpose of this study was to examine the factors that influence the completion of PhD degrees and identify obstacles to completion at a Hispanic Serving Institution. Low completion rates are a national and global problem predicted to generate a critical shortage of professionals needed by society. The researcher utilized a phenomenological qualitative study to research the phenomenon through the interpretation of an individual's experiences in various situations (Stake, 2010). This research is important as it aims to analyze programs with high completion rates to find the factors that contribute to or impede dissertation completion. This project will focus on …

Variational Bias Sampling For Collaborative Filtering Recommender Systems, Prisca Stephens

Theses and Dissertations

Advancements in digitalization has yielded enormous growth of data on online platforms, overwhelming users with multitude of options to choose from. Recommender systems narrow down these options to a few relevant ones thereby facilitating the decision-making processes for users. This study presents a framework for integrating variational bias sampling into model-based collaborative filtering techniques for recommender systems. Variational bias sampling is a novel and unique way to account for random factors that affect explicit ratings in collaborative filtering recommender systems. A Gaussian distribution is used to model all the possible random factors that could affect ratings. Sampling user and item …