Digital Commons Network^™

Thermodynamic Assessment Of Chromium Corrosion In The Na-K-Mg-U(Iii, Iv) Chloride Salt, Jacob Allen Yingling

Theses and Dissertations

Thermodynamic descriptions of high-order molten chloride salt systems are essential for the development of fast molten salt reactor (MSR) technologies. However, a complete thermodynamic assessment of the essential Na-K-Mg-U(III)-U(IV) molten chloride salt with the most prevalent CrCl2 corrosion product has yet to be provided. This is remedied in the present work through application of the CALculation of PHAse Diagrams (CALPHAD) approach to the available thermodynamic data and new measurements that include differential scanning calorimetry (DSC) observations for previously unexplored two and three component chloride salt systems. Through these efforts, a unique approach was developed for the quantification of uncertainty in …

Connecting Writing To Life: The Effects Of Place-Conscious Education On Writing In A First Grade Classroom, Tara P. Dietrich

Theses and Dissertations

This study describes a problem of practice encountered in a first-grade class in the southeast. Students exhibited negative attitudes during the writing process. Because of this, the quality of their writing suffered. The purpose of this study was to explore the relationship between attitudes and writing achievement in a first-grade class using place-conscious education. Additionally, this study was also built upon the social constructivism learning theory. To address the problem of practice, the researcher conducted a mixed-methods action research case study to analyze the effects of place-conscious education on students’ attitudes and proficiencies on writing. The study was guided by …

Use Of Dic Measurements With Finite Element Models For Direct Heterogeneous Material Property Determination And Wrinkle Formation During Automated Fiber Placement, Sreehari Rajan Kattil

Theses and Dissertations

In this work, application of DIC in combination with finite element modeling is demonstrated for efficient material characterization for complex heterogeneous materials and tow wrinkle formation during automated fiber placement.

The first part of the work describes the integration of DIC measurements with finite element models for direct property identification in heterogeneous material systems. The material property identification is based on solving partial differential equations (PDE) of equilibrium for unknown elastic material properties with known boundary conditions and full field strain data (Eg. DIC). The PDEs are solved numerically using Petrov-Galerkin finite element procedure. The classical Bubnov-Galerkin method is shown …

High-Throughput Computation Of Interfacial Thermal Management Of Wide-Bandgap Semiconductors, Hao-Wen Chen

Theses and Dissertations

As semiconductor electronics, in particular high electron mobility transistors, get hot in operation, people are trying to incorporate different semiconductor materials to solve the problem of heat dissipation to maintain the device efficiency and performance. In this master thesis, two different packages, LAMMPS and almaBTE, that are focusing on micro-scale and atomic scale respectively, are used to simulate the heat transfer process across interfaces in two different scales. In the LAMMPS simulation, the research is exploring how the location of atoms and the thickness of interfacial layers will influence the interfacial thermal conductance. On the other hand, using the almaBTE …

Molten Salt Thermal Properties Database – Thermochemical Development And Thermodynamic Assessment Of Various Molten Salt Systems, Johnathon Chandler Ard

Theses and Dissertations

The Molten Salt Thermal Properties Database – Thermochemical (MSTDB-TC) is a validated open-source database for thermochemical modeling of molten salt reactor (MSR) relevant fluoride and chloride salt systems. The database has been created and populated by leveraging available models from literature as well as completing novel system assessments. The development and contents of the MSTDB-TC v1.2 initial release are detailed along with various system assessments performed in the course of the work. The database utilizes a major strength of the CALPHAD thermodynamic modeling method. This is the ability to estimate higher-order system behavior by combining modeled lower-order systems, …

The Power Of Story In Developing A Cycle Of Efficacy For Teachers And Students, Melissa Renee Ewing

Theses and Dissertations

There is scarce nationwide evidence of the impact of instruction on student achievement in the area of writing (Coker et al., 2018; Persky et al., 2003; National Assessment of Educational Progress, 2002). Standardized writing assessment has shifted to text-dependent analysis, which requires students to read and analyze a passage and then compose an essay in response to a text dependent prompt. This type of writing requires students to understand how and why authors make decisions and then support a claim with analysis. This multiple-case, action research study followed three elementary teachers as they reflected on a journey resulting in transformation …

Elucidating The Interdependence Of Motor-Cognitive Development And Performance, Thomas Cade Abrams

Theses and Dissertations

As the development of complex coordination and control (i.e., motor development) involves the integration of neuromotor, psychological, social, and cognitive processes (i.e., executive functions), a better understanding of how these processes are embedded and manifest across stages of development throughout the lifespan is needed. The long-term processes associated with the acquisition and development of motor competence (MC), specifically, effortful practice and performance of various locomotor and object control skills, provide direct mechanisms for contributing to executive function (EF) development via different learning-related (e.g., synaptogenesis, hippocampal neurogenesis) as well as exercise-related (e.g., exercise-mediated neurogenesis, angiogenesis) mechanisms. However, traditional MC assessments use …

Uncrewed Aircraft Systems For Autonomous Infrastructure Inspection, Michail Kalaitzakis

Theses and Dissertations

Uncrewed Aircraft Systems (UAS) are becoming increasingly popular for infrastructure inspections since they offer increased safety, decreased costs and consistent results, compared to traditional methods. However, there are still many open challenges before fully autonomous, reliable, and repeatable UAS inspections. While a UAS platform has increased mobility and can easily approach hard to reach areas, it has limited range and payload capacity and is susceptible to environmental disturbances. Therefore, current operations are limited to Visual Line of Sight (VLOS) manual inspections that usually result in just a qualitative (visual) assessment of the structure.

The objective of this work is to …

Monitoring Titanium Dioxide Engineered Particles In Rural And Urban Surface Waters, Md Mahmudun Nabi

Theses and Dissertations

Quantifying and characterizing engineered particles in environmental systems is key for assessing their risk but remains challenging and requires the distinction between natural and engineered particles. The Ph.D. dissertation research described in this thesis contributes to the current attempts to improve environmental nanoparticle analysis and better understand nanoparticle behavior in natural systems, with the focus being on natural streams, and the application of single particle inductively coupled plasma-time of flight-mass spectrometry (SP-ICP-TOF-MS) for distinguishing and tracing the origins of environmental nanoparticles. The objective of this dissertation is to characterize and quantify the concentrations of titanium dioxide engineered particles in urban …

Durability Enhancement Of Anion Exchange Membrane Based Fuel Cells (Aemfcs) And Water Electrolyzers (Aemels) By Understanding Degradation Mechanisms, Noor Ui Hassan

Theses and Dissertations

The past several years have seen remarkable progress in renewable energy sources such as solar and wind, showing excellent efficiency and significant cost reduction. The intermittent nature of renewable resources requires them to be integrated with energy storage systems that can hold or convert this excess energy into other forms. Though batteries have been the most popular, it is also possible to store the energy as chemicals and fuels, such as hydrogen (H₂). Hydrogen generation from water electrolysis has been receiving significant attention in recent years. Among the existing water electrolysis technologies, anion exchange membrane electrolyzers (AEMELs) are …

Xenobiotic Exposures On Women’S Reproductive Health, Maria Zubizarreta Mcclam

Theses and Dissertations

Environmental and chemical exposures are continually introduced into our bodies. The female reproductive cycle is complex and particularly sensitive to toxic substances. A recent rise in infertility and reproductive diseases and cancers make reproductive toxicity a public health concern. The overall purpose of this dissertation is to explore how environmental and chemical exposures impact women’s reproductive health and overall wellbeing. To do this, a variety of topics related to women’s reproductive health are explored, including how environmental exposures can impact reproduction, methods for studying reproductive dysfunctions, fertility preservation among cancer patients, and the overall wellbeing of female cancer patients.

The …

The Use Of Social Justice Socioscientific Issues In Secondary Biology Classes: An Action Research, Stephanie Marilyn Bailey

Theses and Dissertations

The U.S. Education system is founded on a Eurocentric focus of curriculum, and students of color are not achieving as high as white students on the National Assessment for Education Progress in science. This research aims to repay the education debt owed to students of color by decolonizing science curriculum through the implementation of lessons centered around socioscientific issues grounded in social justice. An action research study was implemented in which 9 ^th grade Biology students participated in three instructional units centered on social justice issues. Data was collected through surveys, focus group interviews, student work, and journal reflections from …

Fabrication Of Asymmetrical Hollow Fiber-Supported Thin Film Membranes, Stack Assembly, And Accelerated Long-Term Stability Test For Oxygen Production From Air, Myongjin Lee

Theses and Dissertations

Air separation is a widely used process for oxygen production. Several separation technologies have been developed for air separation, including cryogenic distillation, swing adsorption, redox process of metal oxides, and electrochemical process. Among these technologies, electrochemical permeation process stands out as a cost-effective and simple process for pure oxygen production from air. The electrochemical permeation process employs a gas-tight membrane to permeate and separate oxygen from air directly, where the membrane conducts both ions and electrons simultaneously. Different membrane designs have been studied to obtain the improved performance for oxygen permeation, typically planar and tubular designs. Among these membrane configurations, …

Shear Localization In The Metallic Nanolayered Composites, Shujing Dong

Theses and Dissertations

In this dissertation, the influences of layer thickness (h), interface orientation relationship (OR) and dislocation slip activities on shear band (SB) formation mechanisms was investigated by means of molecular dynamics (MD) simulations.

The effect of h and dislocation slip systems on the shear localization in Cu-FCC/Nb-BCC MNCs was studied. The strain softening observed in those samples was triggered by the SB formation. The microstructure evolutions and dislocation slips revealed that the unsymmetrical dislocation transmission across the interface induces the shear localization and promotes the SB formation. The quantitative analysis of the change in the separation distance of initially …

Arctic Ocean And Subarctic Seas Dynamics In A Changing Climate, Sarah B. Hall

Theses and Dissertations

Salinity is the primary determinant of the Arctic Ocean’s vertical density stratification in the upper ocean, which has major implications on the ocean’s physical dynamics alongside a period of rapidly declining sea ice. In recent decades, the Arctic’s freshwater content (FWC) has increased as a result of the accumulation of freshwater source inputs. Additional freshwater exported to the North Atlantic may hinder overturning processes that are vital to the regulation of global climate. This dissertation employs in situ measurements, satellite observations, and ocean model simulations to better understand salinity and freshwater changes in the Arctic Ocean during this changing climate. …

Supported Metal Bifunctional And Bimetallic Catalysts With Precisely Controlled Structures And Properties, Anhua Dong

Theses and Dissertations

In heterogenous catalysis, metallic nanomaterials play vital roles in numerous chemical processes. However, monofunctional catalysts are greatly impeded in their applications especially in the systems including tandem and/or sequential reaction steps. Besides, the catalytic performance can also be greatly influenced by the particle size, morphology, and geometry of the surface metal atoms.

The goal of this work is to synthesize bifunctional or bimetallic nanoparticles with high metal dispersion and homogenous alloys by rational synthetic strategies to facilitate the catalyst function. Strong electrostatic adsorption (SEA) is an effective and facile methodology to produce well dispersed and uniform nanoparticles. Metal-acid bifunctional catalysts …

Closed Form Implicitly Integrated Models For Computationally Efficient Simulation Of Power Electronics, Andrew Wunderlich

Theses and Dissertations

This work describes novel closed-form, implicitly integrated (CF-implicit) models of switched-mode power converters which feature implicit integration but require no iterative numerical solving algorithm for evaluation because they are explicitly solved prior to model execution. The derived models capture the large-signal dynamic behavior of the power converters, so their use and accuracy are not limited to any one set of operating conditions. These models can be implemented in any computational environment, including directly on an existing embedded controller as a digital twin. Since no iterative solver is required, the models are highly computationally efficient and have a very predictable worst-case …

Self-Assembling Porous Supramolecular Networks Capable Of Post-Synthetic Modification With A New Approach To Reticular Design With Semiconductor Potential, Steven A. Sloope

Theses and Dissertations

In past decades, research in self-assembling supramolecular frameworks have been produced with vast surface area, inherent from their porous nature. Predesigning monomers in a reticular manner allows a framework’s structure to be known before self-assembly occurs. This is very helpful since high porosity is sought after for many purposes such as hosting guests within the framework, post-synthetic modifications, sensing and detection, selective catalysis, semiconduction, etc. Methods of design usually focus on forming intrinsic porosity and unfortunately, sometimes the network formed is not as expected and porosity is lost.

In Chapter 1, we discuss novel ways of network formation, their potential …

Mimo Antenna Systems For Wireless Handheld Devices, Ahmed H. Abdelgawwad

Theses and Dissertations

Mobile communications have seen tremendous growths in the last decades in the form of smartphones, watches, wireless enabled Personal Digital Assistants (PDAs) and so on. The current and future wireless communication systems require high data-rate capabilities to support high speed needs of users in modern applications. Multiple-input multiple-output (MIMO) antenna systems have become the most promising candidate to support the increased data demand. Therefore, they have emerged as an integral part of the new 5G wireless standard. One key challenge regarding MIMO systems for the handheld is to be able to successfully accommodate multiple miniature platform integrated antennas within a …

Supporting Black Children Within A Eurocratic Educational System: Making Culturally Relevant Pedagogy Foundational To The Role Of The Literacy Coach, Jennipher C.K. Frazier

Theses and Dissertations

This critical qualitative study documented what was learned about the process of making culturally relevant teaching foundational to the commitment of a literacy coach while working closely with a kindergarten and first grade teacher for one school year. Critical Race and Black Critical (BlackCrit) theories were the driving theoretical frameworks used to design the study, represent findings, and provide insight into the process of working to make culturally relevant pedagogy (CRP) foundational to the role of a literacy coach with a particular focus on supporting the Black child. The methods used to gain knowledge about CRP as foundational to the …

When And Why Targeted Products For Underserved Consumers Backfire, Ruoou Li

Theses and Dissertations

As the demand for creating and embracing a diverse marketplace increases, marketing strategies that over-generalize the needs of different consumer groups are no longer viable. Thus, many brands and companies have begun offering inclusive products that accommodate the specific needs of historically underserved consumers (e.g., women, people of color). One important question for marketers to answer is how these inclusive products should be promoted to appeal to these previously undervalued consumers. While prior research suggests that consumers will favor products with more explicit descriptions of the target consumer (i.e., blatant targeting) because doing so makes the targeted identity salient, I …

Inspiring Excellence In Doctoral Nursing Education Through Partnership: Incorporating An Innovative Change Model To Improve Dnp Project Outcomes, Melanie Brewer, Debbie Conner, Transition Management Partners, Llc

All Faculty and Staff Scholarship

Background/Introduction

Franklin University, a leader in educating working adults, formed an academic practice partnership with OhioHealth. Integrating the OhioHealth Change Management Model (CM) into the Doctor of Nursing Practice (DNP) program marks a deviation from a theory-based project to a more theory-to-practice model for managing organizational change. The CM provides leadership-driven DNP students with access to an innovative, real-world approach to prepare to transform organizations, systems, and healthcare through evidence-based interventions.

Purpose

The CM is a novel, goals-focused, data-driven approach used to manage people while implementing evidence-based practice, policy, or business change in an organization. The model includes Identifying executive …

Scaffolding Full-Length Texts In A Middle School Classroom To Promote Reading Engagement, Elizabeth Vandergon

School of Education and Leadership Student Capstone Projects

The research question addressed in this capstone project is: How can teachers scaffold a full-length text in order to increase reading accountability and engagement from students in a middle school setting? The capstone paper documents multiple approaches to reading consistency, growth, accountability and engagement. Additionally, this document follows with the creation of a middle school reading unit meant to engage with the works of Reutzel and Juth (2014), Gallagher (2009), and Daniels (2002). The topics focused on are approaches to reading, influences on student reading motivation, and classroom scaffolds and strategies to promote reading engagement. Included within this capstone paper …

Citizen Science As Experiential Education In The Modern Classroom, Peter Swan

School of Education and Leadership Student Capstone Projects

Secondary education has grown increasingly dependent on delivering instruction and materials via mobile devices and computers in the 21st century. Research has long shown the effectiveness of “student-centered”, experiential and “place based” learning in the classroom. Citizen science initiatives have been demonstrated to be meaningful ways to teach the nature - and practice - of scientific inquiry. This paper explores the current trends in secondary science education in light of recent societal transformations and investigates the body of literature regarding environmental, outdoor and experiential education. The project then proposes a solution to integrate experiential, citizen science into a modern, digital …

Effective Consequences, Jenelle Poer

School of Education and Leadership Student Capstone Projects

The aim of this project is to explore the question: What are the most vital elements of effective consequences? What allows consequences to change student behavior? How can you reduce or eliminate the negative side effects of consequences? My research on the topic, reading studies and scholarly reports, shows that there are multiple strategies, but a few common elements can be distilled from the various techniques. The most vital of these elements are: clarity, teamwork, warmness, and reflection. The resulting project consists of a 4-part professional development workshop for teachers. Each workshop session focuses on one vital element of effective …

Joy In Choice: Cultivating A Choice-Centric Literacy Classroom In Upper Elementary, Alexandra Pickell

School of Education and Leadership Student Capstone Projects

The research question addressed in this project is: How do teachers initiate and nurture joyful, personally meaningful opportunities for reading in the classroom? This project is an introductory website detailing how and why teachers can shift their reading block to make it a time in the day when students are making choices for themselves. In so doing, student motivation and joy for reading is at the forefront of the classroom (Gambrell, 2015). The intended audience is any upper elementary teacher looking to decenter the teacher’s voice during independent reading, but is of particular importance for teachers who already have an …

Trauma-Informed Mathematics: Using Portfolios To Promote Reflection And Resilience, Ethan Somes

School of Education and Leadership Student Capstone Projects

Mathematics has a reputation for being abstract, complex, and for many, incomprehensible. In schools, it is common for students to dislike math and to feel self-conscious about their abilities or performance. The typical structure of math assessments, namely tests that are time constricted and highly stressful, creates a cycle of poor performance, disengagement, and high anxiety. This suggests that a new way of assessing students is needed, one that shows the fuller picture of students' math capabilities. This leads to the research question: how can the use of portfolios in math class help students begin to heal from trauma or …

The Impact Of Climate Change Education In An Outdoor Classroom On Middle School Students' Attitudes And Understandings Towards Climate Change, Kelly Peterson

School of Education and Leadership Student Capstone Projects

This capstone paper and project seek to answer the question: how does learning about climate change in an outdoor classroom impact middle schoolers’ attitudes and understandings toward climate change? The most effective methods to teaching climate change include a place-based, multidisciplinary approach with high levels of inquiry and engagement. When students learn outdoors, they also engage in place-based learning that is highly inquiry based. Combining climate change education with outdoor education is an effective way to approach climate change education. Through use of the Learning Cycle and Understanding by Design, a unit on ecosystem dynamics, biodiversity, and ecosystem services was …

Effective Teacher-Parent Communication Tools To Empower Families To Be Active In Their Children’S Learning, Ellis Richardson

School of Education and Leadership Student Capstone Projects

Creating an environment that is conducive for learning is an essential component of education. In search of ways to achieve this goal through family engagement the question was posed, How can educators effectively communicate with families to empower them to take an active role in their child’s learning? Research has demonstrated that there is a link between student success and teacher-parent partnerships through one way and two way communication methods. The project involved creating a set of resources for educators to foster and maintain teacher-parent partnerships with the goal being student success. The resources are accompanied by a professional development …

The Best Way To Utilize Makerspace In A 6th Grade Science Classroom, Amanda Mahlstedt

School of Education and Leadership Student Capstone Projects

The research question addressed in this capstone project is: “How can the MakerSpace model be implemented in a sixth grade science classroom successfully?” This paper follows a sixth grade science teacher's journey into learning more about MakerSpace and how to implement the MakerSpace model in a science classroom. This paper also follows how this learning influenced the creation of a MakerSpace guide intended for educators that are interested in implementing a MakerSpace in their classroom, specifically a sixth grade science classroom. The topics of focus are: what is MakerSpace, what makes it different from other science programs, research behind MakerSpace, …