Digital Commons Network^™

Black Beyond Measure: An Antideficit Exploration Of Cultural Capital Within A National Society Of Black Engineers (Nsbe) Chapter At A Predominantly White Institution (Pwi), Rhonda Harley

Dissertations

Historically, Black students have been excluded from Predominately White institutions (PWI) longer than welcomed to attend and matriculate (Harper et al., 2009). Due to this lack of inclusion, African American students' educational experiences often center on academic disparities, inequality of opportunity, and under-preparedness in career planning within the American education system. While there has been a fair amount of research on the lack of representation of Black students in the engineering disciplines, the heavy focus on quantitative data offers little insight into the unique ways students succeed and overcome institutional and systemic barriers in pursuit of their degree. Undergraduate experiences, …

Improving The Retention Of United States (U.S.) Government Science, Technology, Engineering, And Mathematics (Stem) Employees, Jeffrey Myers

Dissertations

The U.S. government workforce has been consistently shrinking since a peak in the 1990s. At the same time, the need for technologically-savvy government workers has dramatically risen in this same period. This divergence in the demand for science, technology, engineering, and mathematics (STEM) employees challenges government leaders to retain these highly demanded workers in the public sector.

Decades of psychological research across many industries has investigated what motivates workers and how best to incentivize them to increase productivity. Maslow and Herzberg, among others, theorized that adult workers have both intrinsic and extrinsic needs that drive their behaviors and resultant productivity. …

A Study Of The Challenges Faced By Students Who Identify As Refugees Who Have Experienced Interrupted Education And Trauma, Merdin Mohammed

Dissertations

Every year, more than 65 million people are displaced worldwide. These refugees, asylum seekers, and internally displaced people flee conflict, poverty, environmental degradation, and other conditions forcing them from their homes. In 2020, the number of individuals internally displaced reached 82.4 million; of this total, 26.4 million were refugees. In 2021, of the 11,411 refugees resettled in the United States, 8.6% resettled in California. When refugee students come to San Diego, the majority resettle in the neighborhoods of City Heights and El Cajon. These refugee children have lived on the road or in refugee camps, faced consistent interruptions to a …

Reaching For The Stars: A Constructivist Investigation Of Astrology As A Tool For Self-Discovery In A New Age Of Leadership, Cameron Martin

Dissertations

To fully understand leadership in today’s world, we need a radical reconceptualization of the developmental process required to lead. Changing paradigms demands new perspectives on leadership; these new paradigms suggest leaders must turn inward and develop knowledge of their inner selves to realize their full potential as leaders.

Astrology is an ancient way of knowing and making sense of the world and one’s place in it that provides benefits to many people in our modern world, despite fervent academic, religious, and scientific criticism. Astrology is more than a divination tool. It is an entire epistemology of self in relation to …

A Mixed-Methods Study Examining The Difference Between Closed Captioning And Lexile Levels, Jim Pruitt

Dissertations

This experimental mixed-methods study explores what happens to student Lexile scores when they use closed captioning. Since the emergence of closed captioning tools in the 1980s, closed captioning has become more mainstream and easier to access today than at any other time in history (Rickelman et al., 1991). Thus, it is through harnessing this technology and bringing it into the classroom setting that the researcher of this study hopes to provide new approaches for educators that want to improve their student Lexile levels, while also incorporating the SAMR model within our increasingly technologically-focused classrooms (Crompton & Burke, 2018).

The quantitative …

A New Model For Predicting The Drag And Lift Forces Of Turbulent Newtonian Flow On Arbitrarily Shaped Shells On The Seafloor, Carley R. Walker, James V. Lambers, Julian Simeonov

Dissertations

Currently, all forecasts of currents, waves, and seafloor evolution are limited by a lack of fundamental knowledge and the parameterization of small-scale processes at the seafloor-ocean interface. Commonly used Euler-Lagrange models for sediment transport require parameterizations of the drag and lift forces acting on the particles. However, current parameterizations for these forces only work for spherical particles. In this dissertation we propose a new method for predicting the drag and lift forces on arbitrarily shaped objects at arbitrary orientations with respect to the direction of flow that will ultimately provide models for predicting the sediment sorting processes that lead to …

A Qualitative Descriptive Study Of The Experiences Of Nurse Educators In Developing And Implementing Concurrent Enrollment Adn-Bsn Programs, Janice E. Hawkins

Dissertations

Nursing leaders have called for more bachelor-of-science-in-nursing-(BSN)-prepared nurses to meet workforce demands. There is limited capacity in BSN programs to meet the projected demand. Currently, associate degree in nursing (ADN) programs produce the majority of registered nurses. To increase the number of BSN graduates, nurse educators recommend innovative educational models for seamless progression from the ADN to the BSN. Concurrent enrollment ADN-BSN programs offer one potential model to produce more BSN graduates. The purpose of this study was to describe the process of developing and implementing concurrent enrollment ADN-BSN programs. The research question was as follows: What is the experience …

On The Edge Of Leadership: Narratives Of Asian Indian American Women In Higher Education In The United States, Denozy Sharma

Dissertations

This study was an investigation of the experiences of Asian Indian American Women (AIAW) in higher education in the United States. The motivation of this study was to gain a better understanding of Asian Indian American Women who, in spite of their rising presence in academia and educational attainment, are noticeably underrepresented in academic leadership roles. Asian Indian American women fall far behind White females in leadership positions in higher education.

A qualitative research methodology has been conducted. The investigation involved the narratives of the five female participants (faculty members and/or administrators in U.S. higher education) who identified themselves as …

Creating, Destroying And Preserving Coherence With Quantum Channels, Masaya Takahashi

Dissertations

Quantum coherence is a fundamental property of quantum systems that can be studied within the framework of a quantum resource theory. In chapter 2, we consider how much coherence can be either generated or destroyed on a bipartite system when the action is restricted to local unitary operations. For pure states, we find that the relative entropy of entanglement and the robustness of entanglement provide tight lower bounds on the amount of coherence that can be destroyed by local unitaries, as measured by the relative entropy and L1 measures of coherence, respectively. We then study the amount of bipartite pure …

Transformative Pedagogy And Science Identity In Undergraduate Anatomy And Physiology, Emily Ann Royse

Dissertations

Anatomy and Physiology (A&P) courses are undergraduate biology prerequisite courses that cover many topics about human biology, including anatomy, histology, organ systems, and homeostasis. The purpose of the course is to equip students aiming to enter nursing and allied health education programs with an understanding of basic biological principles relevant to human biology and pharmacology. However, these courses have a high incidence of failure, and many students need to retake the course to progress in their competitive academic programs. Students tend to rely on memorization techniques to learn the course content, and given the nature of A&P as a discipline, …

An Examination Of Academic Growth In Middle School Students Receiving Tier 3 Instruction And Teacher Perceptions Regarding Mindset, Stephanie M. Opela

Dissertations

Existing research on the implementation of RTI and growth mindset practices at the secondary level was sparse, despite the literature on the challenges facing the middle school structure and best practices for adolescent learners. This quantitative study added to the body of research by examining components of each effort in an urban school district. The researcher compared the academic growth of middle school students who received Tier 3 instructional support in reading or math to the academic growth of students who did not receive Tier 3 support. The data revealed no significant difference between the growth of the two groups. …

An Historical Study Of Student Outcomes For School Improvement Grant Recipient Turnaround High Schools In The State Of Missouri With Emphasis On Ninth Grade Achievement, Attendance, Discipline, And Graduation Rates, Juanita Chambers

Dissertations

The purpose of this study was to analyze the implementation of the School Improvement Grant using the Turnaround Model to improve student academics, by looking at attendance, and drop out and graduation rates on ninth-grade achievement in Missouri. In the United States, within our urban schools, high school drop-out has been a serious, national crisis, which effects the graduation rate. Dropping out of high school has many unfavorable results that have negative effects on the economy, such as employment, crime, personal earnings, and health, such as in the lack of insurance. Students exhibit problems before they enter high school. Thus, …

Exploring Perceptions Of Math Instructional Practices In Preparation For High-Stakes Testing, Rachel M. Green

Dissertations

In all things, I give my God glory; He is my strength and comforter. To my mom, thank you for giving me life and choosing to love me relentlessly. You are, to me, an inspiration and a warrior for Christ. To my mother-in-law, my first classroom teacher, completing this project could not have happened without you. Its success is just as much yours as it is mine. Thank you for giving me my best friend and biggest supporter. To my Joe, the wind beneath my wings and protector of my heart, you have been with me through every season of …

Bayesian Joint Modeling For Longitudinal Outcomes Of Exponential Families And Informative Time Points, Michael Safo Oduro

Dissertations

The benefits of longitudinal data in clinical research are immense, owing to the potential to detect phenomenon changes and trends over time. An avalanche of traditional methods exist for the analysis of this data kind, most of which are predicated on the assumption of fixed time design for study individuals. This assumption however, is not always tenable. Consider occurrences that can alter the time or visit profile of subjects in a clinical trial, such as adverse events. These may result in not just irregular visit times, but also unbalanced data on subject outcomes. Hence, one can consider visit times to …

Membrane Bioreactor For Enhanced Enzymatic Hydrolysis Of Cellulose, Saleha Abdullah Al-Mardeai

Dissertations

With the rising environmental concerns related to fossil fuels utilization and the depletion of these resources, interest in bioethanol from lignocellulosic waste as an alternative, sustainable energy source has been increasing. Date palm waste is considered a good feedstock for bioethanol production, especially in countries of large date palm plantations, such as the United Arab Emirates.

In the lignocellulose to bioethanol process, the enzymatic hydrolysis of celluloses to produce simple sugars that can be converted to bioethanol by fermentation is the most challenging step, and enhancing it is essential for efficient and feasible operation. Enzyme inhibition by the products is …

Bis(Tryptophan) Amphiphiles: Design, Synthesis And Efficacy As Antimicrobial Agents, Michael Mckeever

Dissertations

Amphiphiles play important roles in nature. These molecules contain both hydrophilic and hydrophobic regions, leading to some astonishing properties. The lipid bilayer of the cell membrane is a fascinating organization of amphiphilic phospholipids. Natural and synthetic amphiphiles, such as antimicrobial peptides, interact with the cell membrane. Such interactions can impact transport of molecules across the cell membrane, disrupting cell functions. In this work, a library of tryptophan-containing amphiphiles was synthesized and their antimicrobial properties were explored.

First, a library of bis(tryptophan) amphiphiles was synthesized. Preparation included a coupling reaction of a diamine with tryptophan residues, via their carboxy-termini, at …

A Quantitative Study On The Impact Of Adapted School Instruction As A Result Of Covid-19 Pandemic On Student Standardized Math Scores In A Midwest Public School District At The Middle School Level, Matthew Walker Buschman

Dissertations

The COVID-19 Pandemic has presented the educational system with challenges that have caused adaptive instruction techniques for all student populations in one way or another. The researcher chose to focus specifically on the impact of adaptive instruction as a result of the COVID-19 Pandemic in the area of mathematics by evaluating student growth on STAR Math Assessments at the Middle School level for a Midwest Public School District. Through evaluating the data from pre-adaptive instruction to post-adaptive instruction as a result of COVID-19, the researcher aimed to identify possible declines in growth as a result of adaptive learning from the …

The Effect Of Classroom And Clinical Learning Approaches On Academic Achievement In Associate Degree Nursing Students, Jo Anne Carrick

Dissertations

While many students compete aggressively to enter into nursing schools, those who succeed have no guarantee they will be successful in their nursing studies, graduating, and passing the National Council Licensing Exam for Registered Nurses (NCLEX-RN®). This study's objective was to gain a better understanding of how nursing students approach learning and to determine what characterizes the successful student. The study's design was based on the theoretical framework of the students' approach to learning, which ultimately impacts on the students' learning outcome.

This study followed a non-experimental causal-comparative study design using the Revised Approach to Studying Inventory - Short Version …

Hydrolytically Degradable Thermosets With Tunable Degradation Profiles Via Ketal-Based Crosslinks, Benjamin Alameda

Dissertations

Thermoset polymer networks are ubiquitous in the construction of high-performance materials due to their excellent mechanical properties, solvent resistance, and thermomechanical performance. However, the crosslinked structure that instills these materials with favorable performance also makes them incredibly resistant to degradation and are nearly impossible to recycle – adding to the ever-growing problem of plastic pollution. Hydrolytically degradable thermosets have emerged as a potentially sustainable alternative to traditional thermosets by affording networks that are inherently degradable in aqueous environments. This dissertation focuses on the development of hydrolytically degradable thermoset networks with tunable degradation behavior through the implementation of ketal-based crosslinks. Given …

Nursing Faculty Shortages: Perspectives From Deans And Directors Of Bsn Programs, Diane Porretta Fox

Dissertations

This study examined the shortage of nurse faculty in one Midwestern state. The purpose of the study was to identify facilitators and barriers to recruiting and retaining nurse faculty. Case studies were conducted, with the primary data source being semi-structured interviews with deans and directors of six nursing programs that offer the Bachelor of Science in Nursing (BSN) degree. The interviews and a review of institutional artifacts informed the study.

An Examination Of Summer Melt For Trio Talent Search And Upward Bound Alumni, Jasmine D. Clay, Jasmine C. Lewis

Dissertations

College access programs provide middle and high school students with essential skills to prepare them for a successful transition to postsecondary education. TRIO Talent Search (TS) and Upward Bound (UB) are federally funded programs established to strengthen the likelihood that students from underserved groups will graduate high school and pursue higher education. Both programs offer support to low-income and first-generation students to ensure equitable access to higher education. While these programs offer a holistic approach to student development, including personal and professional support, some students from underserved groups experience challenges during the summer months that prevent them from enrolling in …

Modifiable Cardiovascular Risk Factors In The Early Adolescent Period, Julia A. Greenawalt

Dissertations

The purpose of this study is to describe patterns and relationships among the modifiable cardiovascular risk factors of smoking behavior, overweight, physical inactivity and poor dietary behaviors within a ninth grade population. Four modifiable cardiovascular risk factors; smoking behavior, overweight, physical inactivity and poor dietary behavior were analyzed from the 2003 Youth Risk Behavior Surveillance System (YRBS) to explore associations in early adolescents, a critical developmental time frame. The specific aims of this study were to: 1) conduct a factor analysis of questions selected from the 2003 YRBS to represent the constructs of smoking behavior, physical inactivity and poor dietary …

Vertex Identification In Graphs, Yuya Kono

Dissertations

In recent decades, there has been increased interest in studying ways touniquely identify the vertices of a given graph. Two of best-known vertex identification methods are referred to as the metric dimension introduced by Slater and by Harary, and Melter in the1970s, and the partition dimension introduced by Chartrand in 2000. The first method deals with locating an ordered set of vertices in a connected graph G and uniquely identifying each vertex of G by means of the distance between this vertex and the vertices in the ordered set. The second method deals with partitioning the vertex set of a …

Irregular Orbital Domination In Graphs, Peter E. Broe

Dissertations

In recent decades, domination in graphs has become a popular area of study due in large degree to its applications to modern society and the mathematical beauty of the topic. While this area evidently began with the work of Claude Berge in 1958 and of Oystein Ore in 1962, domination did not become an active area of research until 1977 with the appearance of a survey paper by Ernest Cockayne and Stephen Hedetniemi. Since then a large number of variations of domination have surfaced and provided numerous applications to different areas of science and real-life problems. Among these variations are …

Characterization Of Disorder And Its Effects On Two-Dimensional Transition Metal Dichalcogenides, Krystal Rose York

Dissertations

Since the discovery of the unique electrical properties of graphene in 2004, there has been an increased interest in two-dimensional (2D) materials. However, graphene is known as a zero-gap semi-metal, thus spurring further research in order to find suitable 2D semiconductor materials. Transition metal dichalcogenides (TMDs) are a class of layered materials that have recently attracted attention. In particular, MoS2, MoSe2, WS2, and WSe2 have direct band gaps in their monolayer form and favorable electrical properties, making them promising materials for both electronic and optoelectronic applications. Like many 2D materials, studies in semiconductor TMD materials began with mechanically exfoliated sheets …

A Remote Sensing And Machine Learning-Based Approach To Forecast The Onset Of Harmful Algal Bloom (Red Tides), Moein Izadi

Dissertations

In the last few decades, harmful algal blooms (HABs, also known as “red tides”) have become one of the most detrimental natural phenomena all around the world especially in Florida’s coastal areas due to local environmental factors and global warming in a larger scale. Karenia brevis produces toxins that have harmful effects on humans, fisheries, and ecosystems. In this study, I developed and compared the efficiency of state-of-the-art machine learning models (e.g., XGBoost, Random Forest, and Support Vector Machine) in predicting the occurrence of HABs. In the proposed models, the K. brevis abundance is used as the target, and 10 …

Experimental Insights Into The Origin Of Microcrystalline Calcites, Mohammed Hashim

Dissertations

A significant proportion of modern marine calcium carbonate sediments is dominated by metastable aragonite and high Mg calcite that either dissolves or stabilizes to low-Mg-calcite (calcite) or dolomite during diagenesis. Sediment dissolution and stabilization have implications for the CaCO3 budget in the ocean and carbon burial rates. Yet, the diagenetic conditions that promote each process and their relative importance are poorly understood. Further, stabilization most commonly produces calcite microcrystals that exhibit various textures and host micropores. Despite their ubiquity in the rock record, the controls on microcrystal textures remain unclear. Here, laboratory experiments were used to investigate aragonite-to-calcite stabilization as …

Evaluating Transition Programs For Students With Disabilities In A Midwest Suburban School District, Edward J. Rodgers

Dissertations

This study aimed to address current support, the effectiveness of services, successful programs, critical resources, potential outcomes, and limitations for the school district's transition services through the program evaluation. The researcher developed a qualitative research study focusing on six research questions to provide recommendations on special education transition services for post-secondary success. The researcher and dissertation committee developed a survey distributed to 121 employees of the study's district. The minimum number of survey responses was surpassed by three, resulting in 33 responses. The survey questions gathered responses to provide information about the district's special education transition programs and services that …

Investigating Self-Directed Learning And Adult Learner Readiness Attributes In A Call Center Environment, Mary Suzanne Scott-Muenter

Dissertations

This study investigated the self-directed learning (SDL) attributes of call center employees and explored the impact of an adaptive learning intervention used within the corporate training program. In order to explore the perception of the learners, the self-rated scale of self-directed learner readiness (SRSSDLR) survey instrument was used to gather participant feedback (Williamson, 2008). Qualitative data was collected from the surveys, completion scores were gathered through the LMS system, and performance data focused on trainee proficiency on the job following training. Quantitative analysis was conducted using the Pearson Correlation Coefficient, and t-tests to determine relationship between the self-directed learning attributes …

The Effect Of Preschool And Kindergarten Participation On Later Achievement Of Language-Minority Student, Xin Li

Dissertations

Evidence has suggested that preschool and kindergarten experiences affect the cognitive and social-emotion development of language-minority students (LMS). This quantitative study aims to illustrate the LMS’ preschool and kindergarten experience by investigating the preschool and kindergarten experience, family environment, and school environment. Longitudinal data from the U.S. nationwide Early Childhood Longitudinal Study, Kindergarten (ECLS-K), was used to apply a hierarchical linear model (HLM). Due to a gap in the literature regarding how school and family environments influence the holistic development of LMS, this study explores whether and how preschool and kindergarten experiences are associated with LMS’ cognitive and socioemotional outcomes …