Digital Commons Network^™

Interaction Between Autonomous Vehicles And Other Road Users : A Simulation Study, Irtiza Rafid Khan

Dissertations

This dissertation evaluates the dynamics and conflicts between Autonomous Vehicles (AVs) and other road users, particularly focusing on the interactions at unsignalized crossings in urban settings and the implications of varying AV penetration rates on traffic performance. Utilizing a co-simulation approach which incorporates the autonomous vehicle simulator CARLA and the microscopic traffic simulation platform SUMO, this research comprehensively studied conflict scenarios at conflicting zones. Specifically, the influence of AV gap acceptance and waiting time thresholds on conflicts, such as collisions and lost time, was examined. Results showed that these thresholds significantly affect conflict performance indicators, highlighting a necessary tradeoff: designs …

Design Of Secure, Low-Power Internet Of Medical Things With Precise Time Synchronization, Steven C. Puckett

Dissertations

With the emerging worldwide aging crisis, low power, secure health monitoring becomes increasingly important. Internet of Things (IoT) technology is revolutionizing many application fields, creating a new opportunity: Internet of Medical Things (IoMT). The main IoMT issues include security, energy efficiency, and time synchronization. This study evaluates the IoMT design space, security weaknesses of IoMT systems, and methods of synchronization of distributed IoT sensors. The researcher presents an analysis of the design space of IoMT controllers in Espressif ESP-32 family of microcontrollers and the development, implementation, and evaluation of the ecoSync: a time-synchronization algorithm for IoMT devices on standard Wi-Fi …

Bioimpedance-Based Real-Time Wearable Physiological Monitoring, Robert Joseph Mathews

Dissertations

Cardiovascular and respiratory diseases account for nearly forty percent of worldwide deaths. A critical factor in preventing these deaths is early detection, treatment, and monitoring of the diseases. Remote patient monitoring coincides with significant advances in integrated circuit technology resulting in greater performance and lower power consumption. In this work, novel monitoring configurations and frequency excitations are assessed across ten subjects to evaluate their suitability for monitoring cardiac and respiratory activity. A custom bioimpedance controller board was fabricated and integrated into the existing UAH euHy board. In the pilot experiment, the average inter-beat interval (IBI) derived from bioimpedance compared with …

Spectral And Radiometric Calibration And Atmospheric Modeling For Sounding Rockets, Nicolas Gene Donders

Dissertations

Sounding rocket telescopes are demonstration test beds for novel science capabilities. These programs explore cutting-edge solar physics around the globe, leading to missions aboard satellites and orbital labs. My research with the sounding rocket team at Marshall Space Flight Center (MSFC) involved various experimental efforts in the lab alongside computer modeling of spectroscopic signals. This dissertation focuses on the Full-Sun Ultraviolet Rocket SpecTrograph (FURST), which is led by a team at Montana State University (MSU) and will deliver spectroscopic observations over a range of 120-181 nm. FURST aims to provide full-disk data at a similar spectral resolution to Hubble (R …

Edible Learning: School Food Service Programming And Experiential Education That Promote Sustainable Agriculture And Better Nutritional Health, Kristina Grasty

Dissertations

The typical American diet, which involves the consumption of processed foods high in saturated fats, sodium, and refined sugar, is known to be unhealthy. Millions of students in the U.S. suffer from symptoms of malnutrition, making them susceptible to compromising health conditions such as type 2 diabetes that may persist into adulthood. Well-designed school nutrition programs and action learning that promotes sustainable agriculture have the potential to enhance students’ nutritional well-being as well as their understanding of the ecological systems needed to support good nutrition. This dissertation uses documentary film as an exploratory, qualitative research method to investigate approaches used …

Identification Of Satellite Observed Lightning And Precipitation Markers Throughout Tropical Cyclone Evolution, Lena V. Heuscher

Dissertations

This study creates a new and unique merged satellite dataset, with data sources including matched Geostationary Lightning Mapper (GLM) and low-earth orbiting Global Precipitation Measurement (GPM) Mission observations. Crafting and iterative analysis of the dataset resulted in a reprocessing of the GPM precipitation feature (PF) database, significant due to use by a broad segment of the science community. The new dataset is used to examine characteristics of mid-/high latitude deep convection as compared to the tropics, and significantly, provide new integrated observations of convective evolution throughout the tropical cyclone (TC) lifecycle to include post-tropical cyclone (PTC) phases. The combined datasets …

Speleogenomics Of Cave Life In North America, Joseph B. Benito

Dissertations

Cave organisms with their unusual morphologies including loss of eyes, lack of body pigmentation, and the compensatory improvement of nonvisual sensory systems have long intrigued and fascinated biologists. Due to their restricted distributions and life history traits, many troglomorphic (subterranean-adapted) species are considered imperiled and are high priority targets for protective management. With increasing anthropogenic threats to cave ecosystems, it is important to study cave-dwelling organisms, so that informed management decisions can be made on a regular basis. Detailed information on the genetics, taxonomy, distribution, and colonization history of cavernicoles are necessary to make rigorous ecological inference and develop respective …

Molecular Interactions In Engineering: Peptide-Driven T Cell Activation And Accelerated Drug Discovery Applications, Armin Ahmadi

Dissertations

In pursuit of an interdisciplinary exploration of molecular interactions from an engineering perspective with a focus on protein-protein and protein-small molecule interactions, multiple research projects were undertaken, leveraging both experimental and computational approaches. The focus of the wet-lab experimental project was on the identification and evaluation of a novel peptide ligand that binds specifically to the human CD3ε and study how this interaction influences T-Cell activation, proliferation, and calcium signaling. A novel peptide ligand, WSLGYTG, was discovered through phage display peptide technology. Peptide interaction to the CD3ε receptor was simulated using molecular docking calculations. This peptide ligand was synthesized and …

Extending Machine Learning Of Cyberattack Strategies With Continuous Transition Rates, Edwin Michael Bearss

Dissertations

Cyberattacks are a growing threat to organizations of all sizes and industries. By better understanding these attacks, better ways to defend against them can be developed. Petri Nets with Players, Strategies, and Costs (PNPSC) is an extension of Petri nets specifically designed to model cyberattacks. The PNPSC formalism includes a representation of the strategies used by the competing players, i.e., attacker and defender, to achieve their goals. This formalism has been the basis for a long-running research program consisting of several interconnected research projects. Projects within that program include automatically generating PNPSC nets from the MITRE Common Attack Pattern Enumeration …

Exploring Moral Distress Among Nurse Leaders, Preston H. Miller

Dissertations

Moral distress (MD) occurs when an individual knows the ethically correct action to take in a situation but institutional constraints prevent the individual from acting. MD is a well-documented phenomenon among nurses and occurs at a high frequency in the critical care setting. When MD is not adequately addressed and actions are not taken to mitigate precipitating factors within an organization, moral injury, moral residue, and burnout may consequentially result in nurses leaving their role or the profession. Nurse leaders are positioned to exemplify ethical leadership and provide support for their staff when MD is experienced; however, nurse leaders experience …

Atmospheric New Particle Formation In Biogenic And Urban Environments, Lee Tiszenkel

Dissertations

New particle formation (NPF) is a process that impacts climate, air quality and human health. NPF occurs in a diverse range of environments, initiated by a variety of different chemical precursors in the atmosphere, including anthropogenic pollutants and organic compounds emitted by vegetation. In highly populated urban areas, newly formed particles can be scavenged during their initial steps of formation by coagulation with pre-existing particles. Thus, NPF must occur rapidly to explain observed NPF events in polluted urban environments. The presence of reduced nitrogen compounds such as ammonia and amines is key to these formation processes. These compounds have a …

Gamma-Ray Mission And Instrumentation Design For Cubesats, Jared E. Fuchs

Dissertations

The application of small satellites, commonly called CubeSats, has ushered in a new area of research focused on enabling small form factors for scientific exploration. In this dissertation, two contributions to the design of instrumentation and mission approaches are discussed, aimed at the study of gamma-ray emission from Terrestrial Gamma-ray Flashes (TGFs) and Gamma-ray Bursts (GRBs). The work supports two projects: the Terrestrial Rays Analysis and Detection (TRYAD) and the Alabama Burst Energetics Explore (ABEX). TRYAD is a 6U CubeSat designed to study TGFs using multipoint measurements of their gamma-ray emission from orbit. ABEX is a 12U CubeSat to study …

Eye Tracking Technologies To Analyze And Visualize The Behavior Of Secure Coders, Daniel Kyle Davis

Dissertations

Secure coders' experiences and their proficiency vary greatly, and any overlooked software security flaws in code can lead to costly repercussions in deployed software applications. The techniques that secure coders utilize to analyze source code and develop mitigation strategies for security flaws are not well understood. Gaining a proper understanding of how coders approach finding and mitigating security flaws can help us efficiently and accurately discover and resolve such issues. One potentially beneficial technique is to collect, analyze, and visualize eye gazes that capture their coding patterns and behaviors. Our systematic literature survey focused on published methods for multiple types …

The Vulnerability Through Cyberattacks Related To Technological Differences Between Centralized, Server-Based And Ethereum Based Smart Home Systems, Friederike Johanna Haberl

Dissertations

Many people use the digital support of smart home systems to improve their homes' comfort, security, and efficiency (Komninos et al., 2011). However, with the growing number of users comes an increasing number of security challenges that must be addressed (Albany et al., 2022). To mitigate these concerns, the smart home industry is exploring new technologies beyond the traditional centralized server model. One promising technology is the Ethereum blockchain, a distributed database technology. However, it is unclear which concrete security advantages the use of this technology offers in the smart home area. Therefore, the purpose of this research is to …

The Effect Of Covid-19 On The Decision-Making Processes Of Local School Governing Boards With Regard To Considering And Enacting State And Federal Policies, J Jesus Contreras

Dissertations

The purpose of this study was to examine and analyze the decision-making and policy development of local governing boards acting in response to the challenges of the COVID-19 pandemic. Quantitative and qualitative data was gathered through open-ended items in a mixed-methods survey and through a focus group interview. This research sought to gather governing board members' perceptions about the effects that the COVID-19 crisis had on their decision-making processes with regard to enacting state, federal, and COVID-19 Relief Funds policies. The findings in the study indicate that governing board members’ understandings of state and federal policy were not nuanced enough …

How Can I Help You Today? How First-Generation Latinx/A/O Community College Students Perceive Counseling, Isaac Escoto

Dissertations

Latinx/a/o students make up almost half of the California Community College system’s population. However, Latinx/a/o students account for about 15% of three-year completion rates (certificate, degree, or transfer). In support of student success strategies, the literature describes the role of counselors and how they help students navigate the complexities of higher education. This mixed-methods study investigated how community college counseling practices and services are perceived by Latinx/a/o students; and which of those practices and services best supported the success of this student population. Key findings included the importance of counseling services, as well as preferred counseling appointment logistics and topics …

Ethnic Studies Implementation In A K-8 District: Culture, Critical Consciousness And Collective Efficacy, Genvieve Dorsey

Dissertations

This research was a descriptive study in which the researcher explored the beginning phases of Ethnic Studies implementation in a Kindergarten through Eighth grade (K-8) school district in Northern California. Using a social justice lens, and through a review of Ethnic Studies, Collective Efficacy, Critical Consciousness, and School Culture constructs, the researcher attempted to capture and articulate a cultural profile of the school district and the degree to which it aligned to the cultural typologies articulated among Ethnic Studies scholars.The study included the collection of several types of data, including: (1) archival documents; (2) teacher focus groups; and (3) administrator …

“It Feels Like A Cultural Shift": Parent School Selection And Experiences With School Choice At Title I Schools, Christina Lee Ballantyne

Dissertations

A neoliberal agenda to institute educational reform via school choice has created a school marketplace where parents and schools are connected in a supply-and-demand relationship. Rather than attend the neighborhood school, some parents can seek alternative school options for their children. Although purported to improve educational outcomes and desegregate schools, school choice has not demonstrated increased student academic achievement nor integrated school spaces. Instead, the school choice movement has been seen to contribute to and perpetuate racial and economic segregation. This study sought to understand the perspectives of parents who have selected their neighborhood Title I school and how they …

Never Too Young: The Existence, Impact, And Sustainability Of Ethnic Studies In Elementary School, Angela R. Guzmán

Dissertations

Ethnic Studies has existed in higher education for more than fifty years. In high school, critical education researchers have recognized Ethnic Studies as vital to improving attendance, lowering suspension rates, and boosting GPAs for BIPOC students. This has given rise to the recent K-12 Ethnic Studies model curriculum adoption by the State Board of Education, and the signing of Assembly Bill 101, making California the first state to require that all high school students complete a semester-long course in Ethnic Studies. Regrettably, Ethnic Studies continues to be mostly limited to higher education and grades 9-12 in public schools despite research …

When She Speaks: A Black Feminist Autoethnography Exploring Joy And Positionality In Higher Education, Leslye M. Tinson

Dissertations

This dissertation examines the intersections of race, class, and gender of a Black woman as an educational leader and doctoral student. Through autoethnography, I explore self-meaning in cultural contexts and focus on how my positionality contributes to my attempts to find joy in academe. Chapter I discusses the gender and racial gaps in the American professoriate and introduces three research questions. Chapter II interprets extant literature and identifies a conceptual framework that utilizes Black feminist thought, critical race feminism, intersectionality theory, and multicultural feminist perspectives to analyze my lived experiences. Chapter III outlines the research methodology of autoethnography to address …

“Can I Get Some Help, Please?”: Examining Contributing Factors To First-Generation Student Success In California Community Colleges, Tijan G. White

Dissertations

This study aimed to determine the percentage of first-generation college students enrolled at California Community Colleges and examine their experiences through a culturally engaging lens using a mixed-methods approach. The research was interested in determining what percentage of community college students hold first-generation college student status using the federal definition of the term, understanding to what extent those students found their campus environments to be culturally responsive and relevant to their needs and what insights some of these students could offer regarding their experiences. The researcher surveyed and facilitated a focus group discussion with students throughout the Bay Area geographic …

Measuring High School Counselor Beliefs On The Importance Of Mtmdss Universal Supports Since Covid-19, Ryan J. Carter

Dissertations

The U.S. onset of the COVID-19 pandemic in 2020 brought immediate and unprecedented disruption to California secondary education. High school students in California have endured varying degrees of uncertainty, hardship, and trauma, with the full extent of impacts on students not yet known. California high school counselors, faced with the dilemma of how to support student needs effectively and equitably during COVID-19, have looked to the state as well as professional organizations for guidance on best support practices. Multi-tiered support frameworks, such as MTSS and MTMDSS have emerged as prominent pandemic response recommendations and are being implemented throughout California. The …

Cultivating Parental Participation And Community Engagement Through Building A Culinary Garden And Teaching Kitchen: Latinx Perspectives On Parental Participation In A Community School, Jaclynne Michelle Medina

Dissertations

This study researched how a school could increase parental participation and community engagement while building a new Culinary Garden and Teaching Kitchen project. This engagement was foundational for expanding parental participation opportunities and further developing the community school. The study explored ways to balance power relationships between the home and school to develop an implementation plan that better reflects the community being served. Theoretical lenses such as CRT and LatCrit were the basis for centering the voices of Latinx families and valuing their various forms of capital consistent with the Community Cultural Model. Participants influenced the design of the garden …

“The Issue Is Already There; Just Have The Conversation!”: Culturally Sustaining Reflection In The Student Teaching Triad, Hanna M. Asrat

Dissertations

There is a vast demographic mismatch between California’s public school teachers (who are majority White, mono-lingual English-speaking women) and California’s public school students. Though universities responsible for educating preservice teachers often include coursework that attempts to help address this demographic mismatch, such as instruction about Culturally Sustaining Pedagogy, if preservice teachers do not get the chance to practice this pedagogy in their fieldwork placement, they tend to fall into to the two-worlds problem. The two-worlds problem posits that preservice teachers view constructivist and Culturally Sustaining Pedagogies learned at the university as theoretical and incompatible with actual teaching, and so they …

Voice Of The Inaudible: Well-Being Of Chinese American Young Adults, Chinese American Parents’ Parenting Competency, And The Correlation Of The Two, Diana Huang

Dissertations

Violence against Asian Americans since the beginning of the COVID-19 pandemic has become a national crisis in the United States. Racism against Asian Americans in the country, however, has been deep-rooted since the nineteenth century. Chinese American adolescents, who are susceptible to identity crisis as young adults and confront racial discrimination as a minority race, face distressing challenges. It is critical to inquire into their lived narratives and hear their voices. The author investigated the early life experiences of nine Chinese Americans and identified how racial identity is shaped at a young age with negative external inputs, as well as …

Influencers Of The Institution: Millennial Women Of Color On Leadership As Classified Professionals In California Community Colleges, Marisol Quevedo

Dissertations

This study centers Millennial Women of Color (MWOC) California Community College Professionals as institutional influencers by understanding how their leadership practices support the success of marginalized, minoritized, and historically underrepresented students and equity-advancing institutional change. In this study I use the term “influencer” to reflect the impact that MWOC, working as classified professionals at a CCC who are committed to serving as leaders beyond their job duties have on their students and within their institutions. The use of “influencer” in this study addresses three different areas that summarize the study’s findings. First, the theme “Key-Makers not Gatekeepers'' addresses the ways …

"A Raisin In A Box": The Experiences Of Racialized Black Males In Leadership Roles In The Non-Profit Sector In Toronto, Canada, Morris Anthony Beckford

Dissertations

Problem

The marginalization of Black and other racialized bodies (people of colour) has led to the position of a leader becoming so synonymous with Whiteness that it is normalized and naturalized; and worse, there has been limited analysis about why this is so. There is even less analysis of the experiences of the few people of colour who occupy leadership roles in organizations (Berkshire, 2008; Bradshaw et al., 2009; Mills et al., 2010; Nkomo, 2011; Ospina & Foldy, 2009). Astonishingly, organizations in diverse communities also have exiguous conversations about such salient issues like race and gender even though there is …

An Exploratory Study Of Entrepreneurial Intention Among Hispanic Entrepreneurs In Toronto, Jorge Perez Moreno

Dissertations

The Problem

Entrepreneurship scholars have claimed that immigrants are more likely to become self-employed due to limited job opportunities, access to social networks, cultural background, necessity, and education and skills. However, the entrepreneurial experience of Hispanic immigrants in Toronto has yet to be examined. This quantitative study examined the attitudes, norms, and perceptions influencing entrepreneurial intention and the factors that encourage self-employment continuation among immigrants in Canada.

Method

This study used a survey questionnaire of ninety-four Hispanic entrepreneurs in Toronto to comprehend their entrepreneurial intention. It examined their proficiencies, studied their business characteristics, and predicted their behavior toward self employment …

Self-Regulation And Academic Motivation As Predictors Of Academic Achievement Of Undergraduate Students In An Online Learning Environment, Sonia Almwalad

Dissertations

Problem

Online learning is a form of distance education that occurs via the Internet (Adams, 2004; Carliner, 1999). The success of online learning depends on student-related factors such as acceptance, willingness, and motivation (Almaiah et al., 2019; Almaiah et al., 2020). When online learning systems are not utilized, students cannot realize the concomitant benefit of improved performance. Online learning has many positives, but it does present a problem when it comes to academic success. Motivation and self-regulation are two of the key factors for successful online learning given that students are subject to minimal supervision or guidance from teachers in …

An Examination Of The Influence Of Ethnic Identity, Spirituality, And Social Support As Predictors Of Resilience Among Black Male College Graduates Born In The United States, Sandy Belizaire

Dissertations

Problem

This study aimed to assess the influence of ethnic identity, spirituality, and social support on resilience among Black males (BM) who were born in the United States of America and are recent college graduates. The achievement gap between BM and their counterparts is among education's most infuriating problems. Educators are more likely to dissuade Black men from going to college, and those who enroll drop out before they graduate (Noguera 2003; Wilborn 2013).

Method

This study employed a non-experimental, quantitative correlation research design using self-report questionnaires. The target population for this study was American-born Black males who were graduates …