Digital Commons Network^™

Improving Data Curation With Spectral Clustering And Shannon Entropy: An Unsupervised Approach Within The Data Washing Machine, Erin Hathorn

Theses and Dissertations

In the ever-expanding landscape of digital technologies, the exponential growth of data presents both challenges and opportunities, demanding innovative approaches to data curation. Effective data curation is pivotal for extracting meaningful insights from vast and complex datasets. This study explores the integration of spectral clustering and Shannon Entropy within the Data Washing Machine (DWM), a novel tool designed to streamline unsupervised data curation processes. The DWM incorporates Shannon Entropy into its clustering process, allowing for adaptive refinement of clustering strategies based on entropy levels observed within data clusters. Spectral clustering, known for its ability to handle complex and non-linearly separable …

Compliant Structures Facilitate Less Invasive And Biomechanically Improved Lumbar Spinal Implants, Daniel J. Orr

Theses and Dissertations

Implants used in lumbar spinal fusion and lumbar total disc replacement procedures have improved substantially over the years, however, the opportunity remains to improve either the adjustability, durability, motion, or minimally invasive characteristics which could aid in achieving optimal surgical outcomes. It is hypothesized that the inherent advantages of compliant mechanisms specifically Deployable Euler Spiral Connectors (DESCs) and a new mechanism known as the interior contact aided rolling element (I-CORE) are well suited for each of these applications and will be explored and utilized as the basis of these proposed designs. By addressing these challenges, the research endeavors to improve …

Engaging Families Of Minoritized Bilingual Preschoolers In Designing A Family Literacy Program, Melany Hooker

Theses and Dissertations

The purpose of this qualitative exploratory study was to include culturally and linguistically diverse minoritized parents in the design of a family literacy program. Parents of traditionally marginalized emergent bilingual Spanish-speaking preschoolers provided feedback on family literacy resources generally and specific resources from the Systematic and Engaging Early Literacy (SEEL) family literacy program, including the website, a lesson plan, and a training video. Culturally relevant pedagogy and user experience (UX) design were applied to determine what these families found accessible, instructive, and important. Feedback was collected through individual interviews and focus groups using UX design. Thematic analyses revealed five main …

Ionic Nanomedicines And Biocompatible Hydrogel: Synthesis, Characterization And Application In Cancer And Drug Delivery, Mujeebat Bashiru

Theses and Dissertations

This dissertation is focused on the development of novel class of ionic materials (IMs), and ionic nanomedicines (INMs) for cancer treatment. These IMs are composed of two therapeutics combined via electrostatic attraction. The impact of various counterions on the drug’s cytotoxic and photophysical properties are unveiled. Moreover, the mechanism of internalization, enhanced toxicity of these materials is investigated by determining their cellular uptake, subcellular localization, and cell death mechanism. Furthermore, the in vivo bioimaging capabilities of the drugs is investigated to validate their potential for clinical relevance. The second part of this dissertation is focused on the synthesis of biocompatible …

Investigating Spatiotemporal Trends Using Precursory Signatures: Implications To Develop Short-Term Earthquake Forecasting Techniques In Sumatra-Andaman Region, Ramya Jeyaraman J

Theses and Dissertations

Earthquake forecasting is a challenging field due to Earth's heterogeneous nature. This research aims to develop a short-term earthquake forecasting model by analyzing spatiotemporal trends and precursory signatures in the Sumatra-Andaman region, known for its high seismic activity and tsunami risk. The study adopts an interdisciplinary approach, integrating solid earth tides (SET), micro shocks, and outgoing longwave radiation (OLR) to gain deeper insights into seismic nucleation processes. The research begins by using Singular Spectral Analysis (SSA) to identify potential seismically vulnerable areas through the analysis of irregularities in SET.

A spatiotemporal analysis of micro shocks is conducted to assess the …

Investigation On The Impact Of Loading Effect Of Fruit Juices On The Performance Of Pulsed Electric Field Generators, Devi S

Theses and Dissertations

Pulsed Electric Field (PEF) treatment is one of the efficient non-thermal food processing techniques which is being preferred as a replacement for thermal pasteurization methods. The effectiveness of PEF treatment was measured in terms of reduction in the microbial load in the food, extension of shelf life of the food and retention of nutritional properties of the food. The successful implementation of the PEF treatment depends upon various aspects such as design of pulse generator, parameters of pulse generator, shape and size of the treatment chamber and most importantly the characteristics of each food items. Design and fabrication of a …

Investigating Secondary Metabolites Of Streptomyces And Bacillus Bacteria That Inhibit Colony Growth Of Pathogenic Potato Fungi (Colletotrichum Coccodes, Pythium Ultimum), Jacob R. Henrie

Theses and Dissertations

Potato (Solanum tuberosum) is a crucial global food crop, yet its production is threatened by fungal pathogens such as Pythium ultimum and Colletotrichum coccodes, which cause significant yield losses and impact tuber quality. In this study, we investigated the antifungal properties of various Streptomyces and Bacillus isolates against these pathogens. The Streptomyces isolates, known for their prolific secondary metabolite production, were selected for their varying efficacy against these fungi. Despite the anticipated potential, Streptomyces isolates exhibited limited antifungal activity against Pythium ultimum and only moderate activity against Colletotrichum coccodes. In contrast, Bacillus isolates, particularly B1, demonstrated strong inhibition of C. …

Advancements Of A Vibration-Based Sound Power Method For Direct And Indirect Applications, Ian Charles Bacon

Theses and Dissertations

This dissertation advances the Vibration-Based Sound Power (VBSP) method for measuring the sound power of vibrating structures, expanding its applicability to a wider range of geometries and acoustic environments. The research addresses limitations of traditional sound power measurement techniques by developing an alternative method that achieves near Precision (Grade 1) accuracy while maintaining feasibility for in situ testing under uncontrolled acoustic conditions. After reviewing the current VBSP method in Unit 1, Unit 2 introduces stitching techniques for Scanning Laser Doppler Vibrometer (SLDV) measurements, enabling accurate 3D scans and extending the method to complex geometries. Experimental validation is provided for baffled …

Eurobond Performance In Emerging Markets: Do Economic Freedom, Contagion Effects, And Strategic International Relations Matter?, Nourhan El Rouby

Theses and Dissertations

This paper studies the factors moving the Eurobond prices and credit ratings issued by emerging markets. By observing a set of variables, including economic freedom, contagion effects and strategic international relations, the study was able to provide a thorough analysis of their impact on Eurobond performance. The research was able to identify significant determinants of Eurobond prices and credit ratings through utilizing panel data from 20 emerging markets over a period of April 2018 to September 2023 where we applied fixed effects linear regression and ordered logit models. The findings resulted that economic freedom, in specific enforcement of contracts, and …

Biodegradable Polymeric Microspheres For Magnetically Guided Drug Delivery To Tumors, Tyler Payson Green

Theses and Dissertations

This thesis investigates the feasibility of utilizing biodegradable polymeric microspheres loaded with the anticancer drug 5-fluorouracil (5FU) and superparamagnetic iron oxide nanoparticles (SPIONs) to magnetically deliver the cancer therapeutic 5FU to a target tumor in the human body. The primary method of material loading consisted of a w/o/w double emulsion mechanism which 1) loads and protects 5FU in the inner water phase consisting of distilled water and polyvinyl alcohol (PVA), 2) dispersed SPIONs in the biodegradable polymeric organic phase consisting of methylene chloride (MeCl2) for eventual magnetic transport, and 3) suspended these w/o emulsion droplets in an outer aqueous phase …

Nature Inspired Optimization For Spectrum Sensing And Allocation In Cognitive Radio Networks, Saravanan R

Theses and Dissertations

Cognitive radio (CR) refers to intelligent radio technology that scans its environment to optimize spectrum use and adjusts its parameters accordingly. It employs a communication system that is aware of its surroundings, including spectrum usage and availability. A key aspect of CR is identifying idle channels by analyzing traffic patterns using effective learning strategies.

However, CRNs face challenges such as cross-layer design issues, spectrum sensing errors, hidden node problems, and complex spectrum management. Spectrum sensing is critical for accessing unused radio spectrum while minimizing interference. Efficient sensing techniques must be cost-effective, fast, and capable of detecting weak primary signals. Although …

Biofabrication Of Tissue Constructs Using Protein-In-Polysaccharide Bioinks For Muscle Regeneration, Harshavardhan B

Theses and Dissertations

Myocardial infarction (MI) and volumetric muscle loss (VML) are debilitating conditions that severely affect patient quality of life and challenge healthcare systems, particularly in diagnosis and treatment. Conventional therapies often result in long recovery periods with limited functional restoration. Advances in regenerative medicine, especially extrusion-based 3D bioprinting, offer promising potential to improve the regeneration of complex tissues by precisely depositing cells and biomaterials layer-by-layer to create tailored tissue constructs.

A critical challenge in muscle tissue regeneration is developing protein-polysaccharide bioinks that closely mimic the native muscle tissue microenvironment. In this study, two protein-inpolysaccharide bioinks (alginate-fibrinogen and methylcellulose-gelatin-alginate) were developed to …

Integrating Gis And Ca-Markov Model To Study Urban Dynamics Of Salem, India In Terms Of Pattern, Intensity And Direction, Linda Theres B

Theses and Dissertations

Urban populations have grown substantially in the modern era and the information age as people seek better living prospects. Currently, more than half of the world's population resides in the cities. Such growth must be monitored to ensure that people enjoy the boons of urban spaces, not the banes. Recognising the significance of urban studies, several researchers have attempted to analyse and predict urban dynamics using remote sensing, Geographic Information Systems, and machine learning methods. However, certain limitations exist, especially in improving the CAMarkov model's prediction performance. In addition, studies have suggested that growth characteristics, such as pattern, intensity, and …

Impaired Speech Recognition Of Neurological Disorder Persons Using Machine Learning And Deep Learning Techniques, Vishnika Veni S

Theses and Dissertations

Speech Assistive Tools have emerged in recent years to support individuals with cognitive and neurological disorders in the field of assistive technology. People affected by neurological disorders such as autism, stroke, cerebral palsy, dysarthria, Parkinson’s disease, and brain injury often find it difficult to articulate desired sounds, resulting in impaired speech. As the population of impaired speakers continues to increase every year, there is a strong need to develop intelligent speech recognition systems for affected individuals. The primary objective of this research is to develop an Impaired Speech Recognition (ISR) system for the Tamil language. Word Recognition Accuracy (WRA) is …

The Impact Of Race-Related Stress On The Minnesota Multiphasic Personality Inventory (Mmpi-3) Of An African American Community Sample, Cassandra Clayton

Theses and Dissertations

Black Americans have endured profound racial discrimination and systemic injustices rooted in the historical legacy of slavery in the United States. These injustices persist today, permeating various facets of life, such as social interactions, education, politics, legal systems, and employment opportunities. Previous research has explored the cultural ramifications of these experiences, which often lead to race-related stressors and negative impacts on the psychological well-being of Black Americans. However, the exploration of how discrimination and racial stressors impact personality test scores of African Americans, such as on the Minnesota Multiphasic Personality Inventory, 3^rd edition (MMPI-3), is limited. This study investigated …

An Empirical Analysis Of The Mmpi-3 Suicidal/Death Ideation Scale, Brittany Barnes Rhodes

Theses and Dissertations

Suicide is a significant concern in society and is one of the leading causes of death in the United States and around the world. Suicidality is particularly prevalent in outpatient psychological treatment centers, with some studies estimating a tenfold increase in prevalence in this setting compared to the population at large. Several measures have been developed to assess suicide risk potential based on symptom frequency and combinations of risk factors, and broadband personality measures have also incorporated suicidality scales into their tests. The current study was focused on assessing the effectiveness of the Suicidal/Death Ideation (SUI) scale on the third …

Utilizing Cultural Responsive Literacy Practices In Order To Increase Reading Engagement In Primary Aged Readers, Molly E. Young

Theses and Dissertations

The purpose of this conceptual research was to explore how culturally responsive literacy practices and various theoretical frameworks can be integrated to enhance reading engagement among primary-aged readers. This study examines the connections among several relevant theoretical frameworks and identifies common themes related to reading engagement. The theories that guided this research include Culturally Responsive Teaching (CRT), Culturally Sustaining Pedagogy (CSP), Funds of Knowledge (FoK), Self-Efficacy, and Self-Determination Theory (SDT). The conceptual framework highlights common themes across these frameworks, such as the importance of professional development and pre-service teacher programs, the significance of recognizing student strengths and backgrounds, and the …

Transcending The Malaise Of Psychology By Being For The Other: An Alternative View For Psychotherapy, Kylie Marie Burdge

Theses and Dissertations

While psychological practice continues to expand, the sobering decline of mental health identified by Hillman and Ventura (1993) is evidenced by increased rates of suicide (Weir, 2019; Hedegaard, 2021; Stone et al., 2018) and psychopathology (Blue Cross Blue Shield Association, 2018; Twenge et al., 2010). Charles Taylor identified, in the same time frame as the noted decline of mental health, a malaise of modernity (1991), that is, the loss of meaning and transcendence in the modern world. Throughout the history of psychology and Western thought and culture, increased rates of psychological distress certainly coincide with what I will refer to …

Structural Social Determinants And Pacific Islanders' Attitudes Toward Psychological Help Seeking, Abigail Elizabeth Norton

Theses and Dissertations

Pacific Islanders (PIs) report encountering various structural barriers to seeking mental health services. This study aimed to: (a) Evaluate the relationship between structural social determinants of health (SSDH) and attitudes toward help seeking, and (b) Test the mediating role of value and need in seeking treatment on demographic characteristics and openness to seeking professional help. A total of 129 participants (69% female) aged 18–74 (Mage = 34.33, SD = 12.73) completed questionnaires assessing SSDH barriers, demographic characteristics, and attitudes toward seeking professional psychological help. Descriptive analyses, confirmatory factor analysis, and structural equation modeling were performed. We found that being unable …

Automation, Improvement, And Sensitivity Analysis Of 3d Parameterized Maize Stalk Models, Joseph Steven Carter

Theses and Dissertations

Maize is the most grown crop in the world. Each year, 5% of maize is lost due to a phenomenon known as stalk lodging (breakage of the stalk below the ear). One of the most promising solutions to stalk lodging is to design stalks with superior geometry to increase stalk strength. Researchers have developed a 3D parameterized maize stalk model, but these models take a long time to structurally analyze and are missing important material properties. This thesis addressed these problems by developing an automated package for analyzing the 3D parameterized maize stalk model, and by measuring the longitudinal shear …

Efficacy Of An Online Mindfulness Training For Adolescents: A Pilot Study, Gus C. Salazar

Theses and Dissertations

Background: Adolescence represents a period in a person’s life where they develop skills and competencies necessary to flourish in the physical, social, emotional, and academic areas of their lives. Additionally, adolescents are facing unprecedented social and mental health challenges. As such, it is important to equip adolescents with tools to help them succeed. Mindfulness is one resource which has been shown to improve symptoms of stress, depression, and anxiety, while also improving mindfulness ability and overall well-being. Aims: The purpose of this study was to conduct a pilot study to examine the efficacy of a self-guided, internet-delivered mindfulness training with …

Actuation And Stabilization Of Volume-Efficient Origami-Inspired Mechanisms, Hunter T. Pruett

Theses and Dissertations

Trends in the aerospace industry are driving payloads to be smaller and less expensive while yet delivering comparatively large antennas. Deployable reflectarray antennas (RA) are the object of much research to meet these demands because they operate in a flat plane and are easier to stow than parabolic reflector antennas. Because they operate in flat plane, deployable RAs are well-suited to thickness-accommodated origami-inspired mechanisms. This work addresses pattern selection and modification, thickness accommodation, actuation, and stabilization of origami-inspired mechanisms intended to be used as RAs. First, a modified Miura-ori pattern termed volume-efficient Miura-ori (VEMO) is introduced, selected for its ability …

Preparation And Efficacy Evaluation Of Chicken Egg Yolk Sourced Igy Against The Venoms Of Cobra, Krait, Russell’S Viper, And Saw-Scaled Viper, Gayathri G

Theses and Dissertations

Envenomation resulting from snakebites is widely recognized as an alarming health risk in tropical and sub-tropical areas. The big four snakes including Naja naja, Bungarus caeruleus, Daboia russelli, Echis carinatus are responsible for most of the envenomation in India. The current therapy for snake envenomation is immunoglobulins, produced from serum or plasma of horses or sheep. To overcome the drawbacks of current antivenom, chicken egg yolk (IgY) antibodies have recently emerged as one of the most promising research avenues.

In this study, the efficacy of chicken egg yolk sourced antisnake venom (ASV) IgY against the big four venoms was evaluated …

Mental Illness Amongst Incarcerated Individuals And Its Effect On Gaining Employment, Tionna S. Miller

Theses and Dissertations

More than half the correctional population has a mental health disorder (NIH, 2022). Having a mental health disorder can severely interfere in one’s transition back into the community, specifically surrounding their access to employment. This dissertation analyzes the extent to which the mental health of previously incarcerated individuals affects their employment upon release. Results from this study concluded that having a mental health diagnosis did interfere with previously incarcerated individuals’ access to employment, especially if those individuals were black. This dissertation concludes with a discussion of the findings, limitations, contributions, as well as implications for practitioners, policy makers and researchers.

Magnetic Resonance Imaging Of Ultrasound Fields For Visualization And Measurement Of Pressure Amplitudes, Paul-Emile Victor Passe-Carlus

Theses and Dissertations

In vivo pressure estimations for therapeutic ultrasound has the potential of rendering treatments using non-invasive ultrasound targeting safer and more reliable. By quantifying pressures and their respective spatial locations, better acoustic predictions and models can be made. In this thesis, we aim to measure a pressure field from a piezo-electric transducer through a ballistic gel medium by using an external gradient coil to encode the pressure field in a way that can be read and quantified using an MRI scanner. We describe the methods and the results pertaining to visualizing a pressure field. The setup was able to capture pressure …

Development Of Temperature Measurement And Control Of 3d Printed Microfluidic Devices Towards Biomolecular Analysis, Derek A. Sanchez

Theses and Dissertations

Microfluidics are devices with channels or reservoirs that have dimensions in the range of micrometers. They have an increasing role in biological analysis processes due to their ability to use very small sample volumes. Many microfluidic processes rely heavily on precise temperature measurement and control. Advances in 3D printing have led to high resolution digital light processing stereolithography (DLP-SLA) printers capable of using bio-compatible materials, available at BYU. This custom 3D printer has a resolution of 7.6 µm in the XY plane and 10 µm in the Z axis. Combined with a custom-made resin, we can produce microfluidic features as …

Design And Analysis Of Optimal Energy Efficient Routing Protocols For Lifetime Maximization And Qos Enhancement In Wireless Body Area Networks, Karthikeyan S

Theses and Dissertations

In recent times, Wireless Body Area Networks (WBAN) a subsection of Wireless Sensor Networks (WSN) a promising technology for the future healthcare realm with cutting-edge technologies that can assist healthcare professionals like doctors, nurses and biomedical engineers which enables one-to-one care by implementing Tele-Medicine and Tele-Health solutions. Machine Learning (ML) and Internet of Things (IoT) enabled medical big data is the future of the healthcare sector and Medical Technology-based industries leading to applications in other sectors such as fitness tracking for commercial purposes, Sportsperson health monitoring to track their day-to-day activities and wearable devices for critical and emergency care.

Recent …

Development Of An Evidence-Based Policy Handbook Utilizing A Hub And Spoke Practice Model: A Quality Improvement Dnp Project, Leah M. Coffman

Theses and Dissertations

Diagnosing a child with a fetal alcohol spectrum disorder in the State of Alaska requires a team-based approach. The current model is a hub model where providers refer to one of a few certified 4-Digit Code method teams in the geographically vast State of Alaska. Telehealth has been suggested as a viable alternative to in-person hub evaluations for fetal alcohol spectrum disorders (FASDs). The State of Alaska FASD program and the Alaska Mental Health Trust Fund’s goals of moving towards a telehealth program for FASD evaluation, diagnosis, and management (WICHE-BHP, 2021). This Doctor of Nursing Practice (DNP) project sought to …

"If Someone Had Stopped The First World Racist, There Would Be No Racism Today": Empowering African American Muslim Elementary Students Through A Critical Literacy(Critlit) Project, Faten Baroudi

Theses and Dissertations

The Critical Literacy (CritLit) project promotes using critical texts to engage readers in examining their lived experiences and understanding of social justice issues. This study used a qualitative participatory approach with a narrative design to research the students’ engagement in a book club using critical texts. Participants were fourth- and fifth-grade African American students who participated in a 4-week project at a weekend Islamic school in Philadelphia. I organized my study into four sessions. Three book club sessions were audio-recorded and observed. Field notes were taken; pre and post-interviews were conducted; student/teacher reflections were collected with students’ notes and handouts; …

The Forgotten Classrooms: Uncovering The Educational Experiences Of Japanese American Students During World War Ii, Tracie D. Rushing

Theses and Dissertations

"The Forgotten Classrooms: Uncovering the Educational Experiences of Japanese American Students During World War II" explores the impact of forced evacuation and internment on the academic and social development of Japanese American students. This study delves into the unique challenges faced by Japanese American students during a time of widespread discrimination and wartime hysteria, highlighting the disruption of education, psychological trauma, and identity struggles experienced by this population. Through a comprehensive examination of historical monographs, sociological research, and personal narratives, this research sheds light on the long-term effects of the internment experience on educational attainment, career paths, and intergenerational mobility. …