Digital Commons Network^™

Title: I: L1-Norm Matrix Completion For Recommender Systems Ii: Conjecturing-Based Classification, Fatemeh Valizadeh Gamchi

Theses and Dissertations

Recommendation systems are essential for providing personalized user experiences, but their performance can be affected by outliers especially in traditional collaborative filtering methods that use the L2-norm. To address this challenge, we developed two new algorithms, SharpEl1rs and SharpEl1rs-Impute, based on the L1-norm to improve resistance against extreme values and effectively handle missing data. Our experimental setting was designed to compare these proposed methods with existing techniques. Then our algorithms are applied to real datasets to assess their performance, with findings indicating that our proposed models offer improved accuracy in some cases and solid performance in others for industrial-scale recommendation …

Considering Systems Of Power And Black And Latine Students’ Belonging In Stem, Korinthia D. Nicolai

Theses and Dissertations

This dissertation focuses on (a) exploring the need for and strategies to facilitate the integration of Critical Race Theory (CRT) and educational psychology and (b) supporting Black and Latine students through examining the impact of systems of power via the integration of belonging and Critical Race Theory. This dissertation follows a three-paper format. In Paper 1, we recognize that psychology researchers can use CRT to explore race and racism. However, psychology scholars may confront growing pains when integrating CRT due to their respective inquiry worldviews–postpositivism and critical–which result in several tensions. These tensions may limit the uptake of CRT in …

A Phenomenological Study Of Online Physical Education On Former Students’ Activity Levels And Fitness Concepts Knowledge, Jerry Veshio

Theses and Dissertations

This applied dissertation was designed to provide an understanding of the perspectives of former online physical education high school students and how participation in the course affected their ability to be active post-high school and their knowledge of fitness concepts. A phenomenological design was used to guide the study’s investigation. Participants in the study were interviewed about their experiences in online physical education while in high school and how that experience currently influences their physical activity levels. Additionally, respondents described the positives and negatives of their experience in the course, specifically as it relates to the course materials, assessments, instructor …

Penalized Interpolating B-Splines And Their Applications, Kylee L. Hartman-Caballero

Theses and Dissertations

One of the most studied data analysis techniques in Numerical Analysis is interpolation. Interpolation is used in a variety of fields, namely computer graphic design and biomedical research. Among interpolation techniques, cubic splines have been viewed as the standard since at least the 1960s, due to their ease of computation, numerical stability, and the relative smoothness of the interpolating curve. However, cubic splines have notable drawbacks, such as their lack of local control and necessary knowledge of boundary conditions. Arguably a more versatile interpolation technique is the use of B-splines. B-splines, a relative of Bézier curves, allow local control through …

Few-Shot Learning For Ner Using Maml, Nourchene Bargaoui

Theses and Dissertations

This thesis investigates the application of Few-Shot Learning (FSL) using Model-Agnostic Meta-Learning (MAML) to enhance Named Entity Recognition (NER) within the domain of Natural Language Processing (NLP), specifically focusing on chemical datasets. The primary challenge addressed is the impracticality of relying on extensive annotated datasets, especially in specialized fields like chemistry. The research primarily explores the concept of Few-Shot Learning, aiming to train models on minimal data while maintaining performance across diverse tasks. It delves into the N-way K-shot methodology, where "N" represents the number of classes and "K" signifies the number of examples per class. This approach is further …

Dynamic Mathematical Approaches To Understanding Pain In Sickle Cell Disease, Quindel Jones

Theses and Dissertations

In the last 50 years, pain in Sickle Cell Disease (SCD) has become more widely studied thanks to advancements in technology and awareness. Clinical studies, population surveys, pharmaceutical trials, and computational models have been created and conducted to elucidate the mechanisms, treatments, and prediction of Sickle Cell disease pain episodes. Computational models have become quite useful in unraveling disease pathology with the rise in data collection accessibility and advanced computational power. In particular, dynamic mathematical models have been used to investigate Sickle Cell disease pathology and treatment. In this work we conduct a literature review of mathematical models used in …

Measuring The Properties Of Rod-Shaped Bacteria By Single-Entity Electrochemistry, Ashley Tubbs

Theses and Dissertations

Antibiotic-resistant bacteria pose a significant and escalating threat to hospitals around the world, necessitating the development of rapid and sensitive detection methods. Single-entity electrochemistry has emerged as a promising approach for detecting and identifying such bacteria, and monitoring the efficacy of antibiotics in real-time. Herein, we employ the translational diffusion equation for circular cylinders to predict the collision frequency of rod-shaped bacteria, informing our experimental setup. Our work demonstrates that lab-fabricated Pt ultramicroelectrodes can sensitively detect bacteria at femtomolar concentrations under migration-controlled conditions. Further, we present a method implemented in MatLab to automate the analysis of step-like signals observed in …

Fear Of God: Exploring Transformative Potential, Misunderstanding, Systemic Challenges, And The Future., Jermaine Ollivierre

Theses and Dissertations

This personal journey is a testament to the transformative power of play within my practice. It is a love story between me and the institution, sparked by my fervor for communal creativity in a graduate school environment. Through creative endeavors like public art installations and silent artist talks, I confront racial dynamics and institutional reluctance to engage with complex issues like Black Lives Matter. My personal experiences of alienation are woven into the broader themes of community building, communication, and systemic change. I navigate the complexities of group mentality and exclusion by deliberately using unconventional forms of expression, such as …

Asymmetric Cuh-Catalyzed Reductive Coupling Of Allenamides With Carbonyl And Imine Electrophiles, Stephen Collins

Theses and Dissertations

The carbon scaffold of many drugs and natural products contain multiple stereogenic centers bearing heteroatoms. As a result of this, chemists have long sought methods to efficiently install these multi-heteroatom functionalities. Reductive coupling reactions have been extensively studied over the past decades, and the allylation of carbonyls via the reductive coupling approach has been a key method for generating chiral allylic alcohols. This work utilizes inexpensive Cu for the asymmetric reductive coupling of allenamides with carbonyls or imines to simultaneously install two heteroatoms (either oxygen and nitrogen or nitrogen and nitrogen, respectively) onto the product. These molecules have a polarity …

Modeling Of Macroscopic Melt Splashing On Beryllium First Wall Panels Of Fusion Tokamaks Under Off-Normal Events, Cheng Zhang

Theses and Dissertations

Beryllium (Be) is a material which is used as a plasma facing component in tokamak reactors due to its unique properties of high thermal conductivity, low density, and high strength. However, under extreme conditions of high temperature and pressure, Be can melt on the surface of armor tiles and molten droplets can be ejected into the reactor chamber leading to disruption of fusion plasma. The variations of pressure, mass density, velocity, and temperature of Be vapor on the surface of melt layer as well as magnetic field strength and direction can influence the splashing of Be melt and their effects …

Paley Graphs, Prime Graphs, And Crossword Puzzles, Robert D. Jacobs Jr.

Theses and Dissertations

In this paper, we will talk about many different mathematical concepts. We will prove theorems about Paley graphs, prime graphs, and crossword puzzles. It will be very fun.

The results in the section about Paley graphs include structure theorems about the subgraph induced by the quadratic residues, the subgraph induced by the non-residues and a few related subgraphs. The main is to better understand the “independence structure” of the Paley graph itself. No good upper bound on the independence number of Paley graphs is known. Theorems about these subgraphs, and various counts aim at future improvement of upper bounds for …

Special Educators’ Insights On Essential Mentoring Components: A Mixed-Method Examination, Rachel W. Bowman

Theses and Dissertations

This mixed-method study used the Nominal Group Technique to gain insights into the essential components of mentoring programs for new special education teachers. Mentors and mentees participated in highly-structured focus groups in which they generated, discussed, ranked, and rated ideas about important elements of mentoring and considerations for matching mentors and mentees. Transcriptions of interviews were coded and analyzed to generate themes, and means of rankings and ratings were calculated. Qualitative and quantitative data were compared, and data were disaggregated by the racial background of the participants. Findings indicated that mentoring programs and matches must be thoroughly individualized and focus …

Explore Security And Machine Learning Applications In Next Generation Wireless Networks, Haolin Tang

Theses and Dissertations

Next-generation (NextG) or Beyond-Fifth-Generation (B5G) wireless networks have become a prominent focus in academic and industry circles. This is driven by the increasing demand for cutting-edge applications such as mobile health, self-driving cars, the metaverse, digital twins, virtual reality, and more. These diverse applications typically require high communication network performance, including spectrum utilization, data speed, and latency. New technologies are emerging to meet the communication requirements of various applications. Intelligent Reflecting Surface (IRS) and Artificial Intelligence (AI) are two representatives that have been demonstrated as promising and powerful technologies in NextG communications. While new technologies significantly enhance communication performance, they …

Hybrid Design Approaches For Reconfigurable Em Structures, Jonathan D. Lundquist

Theses and Dissertations

The modern world is replete with reasons for employing reconfigurable electromagnetic (EM) structures, but some of the most pressing needs require advancements in power consumption, speed, and footprint [1]. Next generation air defense (NGAD) fighters could benefit from new electronic warfare (EW) countermeasures [2], as well as adaptive stealth technology [3], while doctors could benefit from reconfigurable microwave ablation antennas that can modify radiation pattern and input impedance to match changes in tissue during ablation and account for variations in tumor shapes [4]. The future of antennas, filters, and lenses is reconfigurable as real-world matters of life and death may …

Openfoam Computational Fluid Dynamic Modeling Of Plasma Expansion Into Vacuum, Robert B. Padgett

Theses and Dissertations

Nuclear weapons, and their effects, have been heavily studied with decades of data and information to create simulations and quantify the risks of their use. However, in the modern day, nuclear strikes pose new risks to precision electronics, power systems, and vital infrastructure. As such, simulations of nuclear weapon use are required due to nuclear weapon testing being prohibited. These simulations can incorporate testing practices, such as laboratory lasers, and computer simulation technology, such as OpenFOAM Computational Fluid Dynamics (CFD). The use of OpenFOAM CFD allows testing in an area that has never been tested with nuclear weapons before, specifically …

Long-Wave Modeling Of Viscous Film Dynamics Inside A Tube With Time-Dependent Radius, Robert E. Hicks

Theses and Dissertations

Lung fluid dynamics is a well studied topic and relevant in the field of research surrounding patients with Chronic Obstructive Pulmonary Disease (COPD) and cystic fibrosis. However, the literature on the mathematical description of the net pulmonary fluid transport in the case of constricting and expanding airways is scarce. In this paper we aim to address how breathing contributes to airways clearance in patients with pulmonary diseases such as COPD and CF in which cilia do not function properly. We begin with the flow of a fluid-filled tube with rigid walls of fixed radius and the effects of gravity being …

The Genetic Architecture Of Cervical Change During Pregnancy: From Modeling To Mechanism — Does The Cervix Mediate Maternal Risk For Spontaneous Preterm Birth?, Hope M. Wolf

Theses and Dissertations

This project leverages clinical data and biospecimens from a prospective longitudinal cohort of pregnant women to study the genetic and phenotypic relationships between cervical shortening and the duration of pregnancy. Sonographic cervical length (CL) was measured throughout pregnancy in a cohort of 5,160 Black/African American women in Detroit, Michigan. Maternal DNA samples were sequenced with a next-generation low-pass whole genome platform. The heritability of cervical change during pregnancy and its genetic correlation with gestational age at delivery (GAD) were estimated using Genome-Wide Complex Trait Analysis. These estimates suggest that cervical change is heritable (h²CL = 51%) and highly polygenic trait. …

Development And Evaluation Of Reactor Physics Transient Benchmarks For Molten Salt Reactors Based On The Molten Salt Reactor Experiment, Mohamed H. Elhareef

Theses and Dissertations

Molten salt reactors (MSRs) are a promising class of advanced nuclear reactors selected as

one of the generation IV reactors. This class of reactors employs a unique design, where fissile

material is dissolved in a molten salt mixture, serving as fuel and coolant of the reactor. The design

features high-temperature low-pressure operation and efficient heat transfer capability, which

leads to significant improvements in reactor thermal efficiency, safety, and waste management.

However, MSRs also have complex phenomena not observed in conventional reactors, such as

fission product transport in the circulating fuel loop. These phenomena impact neutron distribution

and reactivity feedback mechanisms …

Efectividad De Una Estrategia De Gamificación En El Aprendizaje En Un Curso De Microbiología En Una Escuela Superior En Puerto Rico, Frank Gregorio Torres Vélez

Theses and Dissertations

El propósito de este estudio fue determinar la efectividad de una técnica de gamificación en la proficiencia académica de estudiantes sobre estructuras y funciones celulares de organismos procariotas en una escuela especializada en ciencias y matemáticas de Puerto Rico. Esta investigación se fundamentó en la Teoría del Aprendizaje Gamificado de Landers y Teoría de la Autodeterminación de Deci y Ryan. Una muestra de 36 estudiantes del 11mo y 12mo grado, matriculados en un curso de Microbiología, participaron de este estudio cuantitativo de muestreo no probabilístico. Los estudiantes participaron de una clase invertida, ¡una actividad gamificada mediante Kahoot!, completaron preprueba, posprueba …

Exploring The Role Of The Teacher In Motivating Students To Learn Mathematics At Alternative High Schools, Anne-Marie Johanne Mohammed

Theses and Dissertations

The purpose of this applied dissertation was to provide an in-depth understanding of the teacher’s role in motivating students to learn mathematics at alternative high schools because motivation impacts academic achievement in mathematics. Students in South Florida must pass an end-of-course exam in algebra as a requirement to receive a high school diploma. Therefore, it is essential that students are motivated to learn the mathematics concepts that are necessary to pass the end-of-course exam. This research study was guided by the following research questions:

1. How and in what ways do mathematics teachers adjust and integrate instructional strategies to support …

External Runtime Execution Monitoring Of A Cyber Physical System Via Trace Interfaces, Peter Vaughan Truslow

Theses and Dissertations

In the past two decades, Unmanned Aerial Systems have progressed from expensive military hardware or one-off custom builds, to include off-the-shelf drones that can be purchased for a rather affordable price and flown by nearly anyone. As the technology and performance have improved, the door is opened to applications that require operation in environments where the consequences for failure are high, such as operating in the navigable airspace or in urban environments, or with human passengers. This requires a great deal of trust in the reliability and integrity of the control systems of the aircraft. A method of monitoring the …

Western Pacific K-12 Educators’ Adoption Of Digital Game-Based Learning, Lorraine Raqueño Catienza

Theses and Dissertations

Western Pacific educational institutions are investing heavily in technology in classrooms to meet the needs of K-12 students. Measuring the effective use of digital technologies in the learning environment has become a routine part of monitoring and evaluating classroom instruction. One area of technology integration that has seen tremendous growth is digital game-based learning (DGBL). The researcher is interested in examining K-12 western Pacific teachers’ willingness to adopt DGBL through a modified Technology Acceptance Model. This study aims to examine the extent to which teachers’ perceived usefulness, perceived ease of use, and technology self-efficacy effects attitude toward adopting DGBL methods. …

Challenges Teachers Face When Implementing Mult-Tiered Systems Of Supports: Recommendations And Interventions, Amber Durrett Drake

Theses and Dissertations

The purpose of this study was to examine the challenges that teachers faced when it came to the implementation of interventions and recommendations in the Mult-Tiered System of Support (MTSS). Through the MTSS, educators provided concentrated teaching, detected early signs of issues related to academic, behavioral, and speech deficiencies, and recommended fact-based interventions and practices in response to students’ needs. Identifying students’ deficits early reduced the risk of large student gaps and improved overall progress. Participants were seven Pre-k through Grade 5 teachers working in a Title 1 school located in a large metropolitan city area. Participants were selected through …

Perceptions Of Secondary School Mathematics Teachers Regarding Teaching Mathematics With Conceptual Understanding, Latisa Williams

Theses and Dissertations

This dissertation was designed to provide current knowledge on the mindset of secondary school mathematics teachers regarding the use of Conceptual Understanding (CU) as an approach to teaching the subject. It is well-documented that when students learn to engage in mathematical conceptual explanations in meaningful ways, they improve their learning. However, reports have shown that students in secondary schools lack effective skills in explaining and applying CU for successful problem-solving. As a result, teachers struggle with methods of instruction that can effectively improve the level of CU with their students in mathematics.

For this study, the researcher used a qualitative …

A Disconnected School: Why Vertical Alignment Is Not Used To Better Transition Students From Middle To High School (A Qualitative Study), Timothy Revels

Theses and Dissertations

The project focuses on one school – The Carrie Anderson School (TCAS) in Medellin, Colombia which is a private bilingual school that has American accreditation and is one of the most popular and well-regarded schools in the country. The idea for this project started with observation of TCAS ninth grade students and how they struggled during the first half of their freshman year in high school. At that time the school did not have vertical alignment between their middle and high schools. Data was collected from the school using student grade data, faculty surveys, and faculty interviews. The data shows …

Perceptions Of Grade-11 Students On The School-Based Assessment In English A And B And Its Impact On Sense Of Self-Efficacy, Karlene Smith-Hines

Theses and Dissertations

This applied dissertation explored how 11th-grade students perceived the English A and B school-based assessment (SBA) and whether their portfolio experience impacted their sense of self-efficacy. Significant research has been conducted on the SBA exploring its benefits, impact, and relevance as well as the challenges and concerns encountered with implementation in various disciplines. Most of the research, however, has focused on teacher perspectives with minimal research exploring student perspectives and the assessment’s impact on them socially and academically.

This qualitative research study adopted an ethnographic approach with a realistic design to conduct this inquiry. This method was used because the …

A Post-Pandemic Measurement Of The Required Soft Employability Skills For Business School Graduates, Sean O. Stallings

Theses and Dissertations

This non-experimental descriptive quantitative applied dissertation was designed to identify and analyze the soft employability skills desired by mid-Atlantic employers of business school graduates in a post-pandemic environment. The study evaluated alignment of the competencies possessed by business school graduates and the desired skills of employers. The study explored opportunities to guide change in the development of learning outcomes for business school undergraduates that were influenced by the effects of COVID-19 to ensure adequate postgraduation placement and overall effectiveness of business school graduates.

Workplace readiness or employability also included identifying new hires who had the full package that included hard …

Assessing The Needs Of Elementary School Students From Low Socioeconomic Environments Displaying Poor Performance In Reading, Reynaldo Flores

Theses and Dissertations

This dissertation was designed to provide current information on the low reading level of students in Grade 4 who are from families of low socioeconomic status (SES). While it was known that SES is crucial to student learning which gave rise to initiates to address the problem, low SES students in elementary school continue to struggle to read at grade level. The Every Student Succeeds Act (ESSA) is used to measure performance index framework in reading along with mathematics, writing, science, and social studies to address and correct deficiencies. The data for the ESSA was drawn from the State of …

Case Study: Implementing Strategies To Meet The Needs Of English Language Learners, Sierra Brooks

Theses and Dissertations

This applied dissertation was designed to provide an understanding of effective ways to meet the needs of English language learners. To focus its inquiry and gain a thorough understanding of the experiences and methods of teachers in various classroom environments, the study used a case study approach. Extensive interviews with the participants yielded interesting insights into the methods they use to tailor their instruction to the requirements of their students as well as the useful resources they include into their instruction. A thorough grasp of instructional dynamics was also made possible by the participants' permission for the researcher to observe …

Fashion Education And Training Prevalence In Fashion Career Success: An Analysis, Mankirat Kaur

Theses and Dissertations

Is the acquisition of fashion education and fashion training for career success a compulsion or a choice? Many designers came and left their legacies to inspire future generations, yet their journeys have often been overlooked in academic research. The purpose of this study is to investigate the impact of education and training through core facets of lifelong learning —formal, non-formal, and informal education —over the past century on achieving career success in the fashion industry. A mixed-method content analysis, utilizing triangulation, was conducted to understand the educational and training experiences of prominent designers. Two research questions guided the analysis: RQ1 …