Digital Commons Network^™

Narratives Of Black Female Elementary School Teachers: Navigating The Normative Discourse Of Whiteness, Thera Tilmon

Dissertations

This narrative research study illuminates the experiences of Black elementary school teachers as they navigate through whiteness on their identity journey. The purpose of this study was to examine the counter-narratives of identity by Black female elementary school teachers within the discourse of Whiteness that remains dominant in the U.S. culture and public school system. This study included semi-structured interviews with six participating teachers from several school districts in a large Midwestern metropolitan city. critical race theory, Black feminist theory, intersectionality, and transcendental theories comprised the theoretical underpinnings of the study. Narrative research design was employed for data analysis resulting …

A Case Study Examining How Students In An Elementary, Early Childhood, And Exceptional Child Educator Preparation Program Acquire Technology Skills, Jana L. Gerard

Dissertations

This qualitative case study examined two sections of an educational technology class that was part of an elementary, early childhood, and exceptional child educator preparation program, to determine how students acquired educational technology skills for future teaching. As the ability to integrate educational technology skills into teaching and learning is vital to preservice educators, this study aimed to address possible changes needed in educator preparation programs to ensure preservice educators are ready to effectively teach with educational technology in their field experiences, student teaching, and future classrooms. In order to examine how students acquired educational technology skills, the researcher observed …

Organizational Culture In Schools: The Impact Of Positive Culture On Staff Retention At Vista Charter Academy, Karrie Elizabeth Munster

Dissertations

No abstract provided.

Diagnostics Of Dementia From Structural And Functional Markers Of Brain Atrophy With Machine Learning, Tetiana Habuza

Dissertations

Dementia is a condition in which higher mental functions are disrupted. It currently affects an estimated 57 million people throughout the world. A dementia diagnosis is difficult since neither anatomical indicators nor functional testing is currently sufficiently sensitive or specific. There remains a long list of outstanding issues that must be addressed. First, multimodal diagnosis has yet to be introduced into the early stages of dementia screening. Second, there is no accurate instrument for predicting the progression of pre-dementia. Third, non-invasive testing cannot be used to provide differential diagnoses. By creating ML models of normal and accelerated brain aging, we …

Teacher Perceptions Of Gender Differences In An Elementary Pbis System, Meggan Buchanan

Dissertations

This research project examined teacher perceptions of gender differences in an elementary Positive Behavior Intervention and Supports (PBIS) System. The purpose of the project was to understand why male students were referred to the office at a higher rate than female students. The research was conducted through a staff survey and disaggregating seven years of Office Discipline Referral (ODR) data through School-wide Information System (SWIS). The critical issues explored are the number of referrals, the types of referrals received, and teachers' perception of gender differences in the PBIS system. It is my hope that this research will help provide the …

Uniting African Philosophy With Traditional African Dance Rituals To Help Heal Mental Health Symptoms From The Impact Of The African Diaspora, Brittnea Jones

Dissertations

The mental health challenges of members of the African diaspora have been a worldwide occurrence for centuries, initially beginning with the transatlantic slave trade. Africans were scattered abroad to different countries and subjected to the severe psychological impact of enslavement. Despite the considerable financial systemic pressure of profit in the slave trade, it caused significant harm to the enslaved Africans and their descendants by erasing Africa's memory and their healing traditions from the hearts and minds of the population. Severe mental health symptoms can arise from oppression and the impact of the African diaspora. This dispersion has left many African …

The Impact Of Psychological Abuse On A Female’S Engagement In Subsequent Relationships And How They Heal From The Abuse, Nicole Kratimenos

Dissertations

ABSTRACT

Objective: This study examined (a) the impact of psychological abuse on a female’s subsequent intimate relationships, and (b) what assisted the female victims of such abuse to heal and build subsequent healthy relationships. Psychological intimate partner abuse is connected to various long-term negative consequences, such as anxiety, posttraumatic stress disorder, self-esteem struggles and trust issues. However, no studies have investigated how these negative consequences affect the female victim’s subsequent intimate relationships, nor what helps the victim heal enough to move on to engaging in healthy subsequent relationships. This study is the first to examine both of these aspects of …

Categorizing Reentry And Reintegration Efforts Across Five States, Modena Stinnette

Dissertations

An average of 12,500 individuals are released from correctional control institutions in America each week. The reentry and reintegration of formerly incarcerated individuals into communities has become a relevant concern. This collateral damage caused by mass incarceration continues to challenge correctional institutions and community-based service providers to create better pathways for individuals returning home. Ending the collateral damage caused by mass incarceration will require a change in the way reentry and reintegration are defined, policies are created, recidivism is defined, and services are provided to individuals affected by mass incarceration. This research explores reentry and reintegration practices across five states. …

A Program Evaluation Of The Support Facilitation Model In One K-8 School, Marvin Pitts

Dissertations

The goal of my evaluation was to determine if the support facilitation model for providing Exceptional Student Education (ESE) was effective for the students' academic success in the school under study. The school under study was a charter school located in the southeastern United States and served students from kindergarten to eighth grade. The school’s community was considered low-socioeconomic based on the number of students receiving free and reduced meals. The two main questions that guided my research were: (1) What are the perceptions of general education classroom teachers and ESE teachers of support facilitation in the school under study? …

They Don'y Expect You To Know Much: Black African International Students Encountering And Countering The Afropessimistic Attitude Within Academic Spaces, Margaret Sergon

Dissertations

Black African international students in the United States are vulnerable to increased microaggressions because of their minority statuses. In addition to being Black and speaking with non-native accents, African students must contend with Afropessimism which in this study refers to the Western world’s negative perception of Africa. The study is a mixed methods study that seeks to understand how the Afropessimistic attitude impacts the way Black African international students are perceived and interacted with, within the academic spaces. The findings indicate that African international students consistently encounter the Afropessimistic attitude, and it impacts their academic engagement. The findings also suggest …

Waves And Oscillations In A Sunspot: Observations And Modeling Of Noaa Ar 12470, Yi Chai

Dissertations

Waves and oscillations are important solar phenomena not only because they can propagate and dissipate energy in the chromosphere, but also because they carry information about the structure of the atmosphere in which they propagate. Among these phenomena, the one of the most interesting ones occurs in the sunspot umbra. In this area, continuously propagating magnetohydrodynamic (MHD) waves generated from below the photosphere create the famous 3-minute sunspot umbral oscillations that affect the line profile of spectral lines due to temperature, density, and velocity changes of the plasma in the region. In the past decades, numerous observations and models have …

Nondestructive Evaluation Of 3d Printed, Extruded, And Natural Polymer Structures Using Terahertz Spectroscopy And Imaging, Alexander T. Clark

Dissertations

Terahertz (THz) spectroscopy and imaging are considered for the nondestructive evaluation (NDE) of various three-dimensional (3D) printed, extruded, and natural polymer structures. THz radiation is the prime candidate for many NDE challenges due to the added benefits of safety, increased contrast and depth resolution, and optical characteristic visualization when compared to other techniques. THz imaging, using a wide bandwidth pulse-based system, can evaluate the external and internal structure of most nonconductive and nonpolar materials without any permanent effects. NDE images can be created based on THz pulse attributes or a material’s spectroscopic characteristics such as refractive index, attenuation coefficient, or …

Improving The Performance And Evaluation Of Computer-Assisted Semen Analysis, Ji-Won Choi

Dissertations

Semen analysis is performed routinely in fertility clinics to analyze the quality of semen and sperm cells of male patients. The analysis is typically performed by trained technicians or by Computer-Assisted Semen Analysis (CASA) systems. Manual semen analysis performed by technicians is subjective, time-consuming, and laborious, and yet most fertility clinics perform semen analysis in this manner. CASA systems, which are designed to perform the same tasks automatically, have a considerable market share, yet many studies still express concerns about their accuracy and consistency. In this dissertation, the focus is on detection, tracking, and classification of sperm cells in semen …

A Self-Learning Intersection Control System For Connected And Automated Vehicles, Ardeshir Mirbakhsh

Dissertations

This study proposes a Decentralized Sparse Coordination Learning System (DSCLS) based on Deep Reinforcement Learning (DRL) to control intersections under the Connected and Automated Vehicles (CAVs) environment. In this approach, roadway sections are divided into small areas; vehicles try to reserve their desired area ahead of time, based on having a common desired area with other CAVs; the vehicles would be in an independent or coordinated state. Individual CAVs are set accountable for decision-making at each step in both coordinated and independent states. In the training process, CAVs learn to minimize the overall delay at the intersection. Due to the …

Numerical Methods For Optimal Transport And Optimal Information Transport On The Sphere, Axel G. R. Turnquist

Dissertations

The primary contribution of this dissertation is in developing and analyzing efficient, provably convergent numerical schemes for solving fully nonlinear elliptic partial differential equation arising from Optimal Transport on the sphere, and then applying and adapting the methods to two specific engineering applications: the reflector antenna problem and the moving mesh methods problem. For these types of nonlinear partial differential equations, many numerical studies have been done in recent years, the vast majority in subsets of Euclidean space. In this dissertation, the first major goal is to develop convergent schemes for the sphere. However, another goal of this dissertation is …

Effect Of Process Control Agents Used In Mechanochemical Synthesis On Properties Of The Prepared Composite Reactive Materials, Mehnaz Mursalat

Dissertations

The study explores synthesis and reactivity of new reactive materials prepared by ball milling. High-energy ball milling became a ubiquitous mechano-chemical tool to manufacture diverse powders, from pharmaceuticals or foods to alloys to new solid rocket propellants. It enabled a dramatic expansion of the range of chemical compositions obtainable; however, it did not so far, allowed one to fine-tune morphology or interfaces in the generated powders. It is shown in this work how different process control agents (PCAs) can serve to tune the powder morphology and reactivity. Commonly used as lubricants and cooling agents during milling, liquid PCAs can be …

Optimization Opportunities In Human In The Loop Computational Paradigm, Dong Wei

Dissertations

An emerging trend is to leverage human capabilities in the computational loop at different capacities, ranging from tapping knowledge from a richly heterogeneous pool of knowledge resident in the general population to soliciting expert opinions. These practices are, in general, termed human-in-the-loop (HITL) computations.

A HITL process requires holistic treatment and optimization from multiple standpoints considering all stakeholders: a. applications, b. platforms, c. humans. In application-centric optimization, the factors of interest usually are latency (how long it takes for a set of tasks to finish), cost (the monetary or computational expenses incurred in the process), and quality of the completed …

Towards Practicalization Of Blockchain-Based Decentralized Applications, Songlin He

Dissertations

Blockchain can be defined as an immutable ledger for recording transactions, maintained in a distributed network of mutually untrusting peers. Blockchain technology has been widely applied to various fields beyond its initial usage of cryptocurrency. However, blockchain itself is insufficient to meet all the desired security or efficiency requirements for diversified application scenarios. This dissertation focuses on two core functionalities that blockchain provides, i.e., robust storage and reliable computation. Three concrete application scenarios including Internet of Things (IoT), cybersecurity management (CSM), and peer-to-peer (P2P) content delivery network (CDN) are utilized to elaborate the general design principles for these two main …

Outdoor Operations Of Multiple Quadrotors In Windy Environment, Deepan Lobo

Dissertations

Coordinated multiple small unmanned aerial vehicles (sUAVs) offer several advantages over a single sUAV platform. These advantages include improved task efficiency, reduced task completion time, improved fault tolerance, and higher task flexibility. However, their deployment in an outdoor environment is challenging due to the presence of wind gusts. The coordinated motion of a multi-sUAV system in the presence of wind disturbances is a challenging problem when considering collision avoidance (safety), scalability, and communication connectivity. Performing wind-agnostic motion planning for sUAVs may produce a sizeable cross-track error if the wind on the planned route leads to actuator saturation. In a multi-sUAV …

Periodic Fast Multipole Method, Ruqi Pei

Dissertations

Applications in electrostatics, magnetostatics, fluid mechanics, and elasticity often involve sources contained in a unit cell C, centered at the origin, on which periodic boundary condition are imposed. The free-space Green’s functions for many classical partial differential equations (PDE), such as the modified Helmholtz equation, are well-known. Among the existing schemes for imposing the periodicity, three common approaches are: direct discretization of the governing PDE including boundary conditions to yield a large sparse linear system of equations, spectral methods which solve the governing PDE using Fourier analysis, and the method of images based on tiling the plane with copies of …

Nystrom Methods For High-Order Cq Solutions Of The Wave Equation In Two Dimensions, Erli Wind-Andersen

Dissertations

An investigation of high order Convolution Quadratures (CQ) methods for the solution of the wave equation in unbounded domains in two dimensions is presented. These rely on Nystrom discretizations for the solution of the ensemble of associated Laplace domain modified Helmholtz problems. Two classes of CQ discretizations are considered: one based on linear multistep methods and the other based on Runge-Kutta methods. Both are used in conjunction with Nystrom discretizations based on Alpert and QBX quadratures of Boundary Integral Equation (BIE) formulations of the Laplace domain Helmholtz problems with complex wavenumbers. CQ in conjunction with BIE is an excellent candidate …

Assessing Structural And Functional Brain Alterations And Work-Related Fatigue In Non-Hyposmic And Hyposmic Covid-19 Survivors, Rakibul Hafiz

Dissertations

In the year 2019, life began to change at the advent of a global pandemic caused by the novel coronavirus. Mask mandates and mass vaccinations have mitigated the effects significantly, yet cases keep rising with new variants, especially, in densely populated countries, like India. Recent neuroimaging evidence shows the virus can attack the central nervous system (CNS). However, exactly which brain regions undergo structural and functional changes remain largely unknown. Many patients experience 'loss of/reduced sense of smell' (i.e., hyposmic) and an alarming number of survivors develop persistent symptoms ('long-COVID') for several months after initial infection. Fatigue is the most …

Repeated Low-Level Blast Induces Chronic Neuroinflammation And Neurobehavioral Changes In Rat Models, Arun Reddy Ravula

Dissertations

Blast-induced neurotrauma (bTBI) is a signature medical concern for military personnel when they are exposed to explosions in active combat zones. However, soldiers as well as law enforcement personnel are also repeatedly exposed to low-level blasts during training sessions with heavy weaponries as part of combat readiness. Service personnel who sustain brain injuries from repeated low-level blasts (rLLBs) do not display overt pathological symptoms immediately but rather develop cognitive impairments, attention deficits, anxiety, and sleep disturbances over time. An improved rat model of rLLB was developed in this thesis by applying controlled low-level blast pressures (10 psi) repeated five times …

Adversarially Robust And Accurate Machine Learning For Image Classification, Yanan Yang

Dissertations

Machine learning techniques in medical imaging systems are accurate, but minor perturbations in the data known as adversarial attacks can fool them. These attacks make the systems vulnerable to fraud and deception, and thus a significant challenge has been posed in practice. This dissertation presents the gradient-free trained sign activation networks to detect and deter adversarial attacks on medical imaging AI (Artificial Intelligence) systems. Experimental results show a higher distortion value is required to attack the proposed model than other state-of-the-art models on brain MRI (Magnetic resonance imaging), Chest X-ray, and histopathology image datasets. Moreover, the proposed models outperform the …

Bodipy-Based Light-Responsive Materials, Zhaoxiong Wan

Dissertations

The energy required for life on our planet is provided by light. In science, light is an important and powerful tool for measuring and modifying substances. For example, under the effect of illumination, light-responsive materials can change their physical and chemical properties. Photochemistry is a branch of research to study the effects of light irradiation on chemical structures and reactions. Some photochemical changes could lead to chemical bond dissociation (such as in photosynthesis) and structure isomerization (such as in the retina). Photochemistry has a strong relationship with human lives and it is essential in many ways. Among photophysics, fluorescence emission …

Type I Error Rate Controlling Procedures For Multiple Hypotheses Testing, Beibei Li

Dissertations

This dissertation addresses several different but related topics arising in the field of multiple testing, including weighted procedures and graphical approaches for controlling the familywise error rate (FWER), and stepwise procedures with control of the false discovery rate (FDR) for discrete data. It consists of three major parts.

The first part investigates weighted procedures for controlling the FWER. In many statistical applications, hypotheses may be differentially weighted according to their different importance. Many weighted multiple testing procedures (wMTPs) have been developed for controlling the FWER. Among these procedures, two weighted Holm procedures are commonly used in practice: one is based …

Unconscious Bias In United States Marine Corps Leadership Doctrine: Examining Microaggressions Through Document Analysis, Patrick Butler

Dissertations

This dissertation employed a document analysis format to examine Marine Corps leadership education doctrine for microaggressions. The United States Marine Corps (Marine Corps or USMC) is the military service with the least diverse officer cadre in terms of sex, gender identity, and race. The study results show a pattern of repeating unconscious bias-related content within the Marine Corps’ documents. Such patterns can negatively affect minority members in terms of their health, acceptance, and performance within the organization. The results also document an overriding bias-culture which puts Marine Corps leadership in a dilemma of trying to encourage conformity to traditional organizational …

Correlates Of Health Literacy And Perceptions Of Burden Among Caregivers Of Persons Diagnosed With Chronic Illnesses, Mubarak Aldawsare

Dissertations

Background/Rationale: Greater attention is needed on factors effectively supporting caregivers because poor well-being of caregivers can hamper overall patient outcomes. Lack of awareness of caregiver burden has implications for healthcare systems globally. Caregivers may encounter various levels of burden as a result of providing long-term care to individuals diagnosed with one or more chronic illnesses. Caregivers with inadequate health literacy are more likely to experience feelings of uncertainty, and as a result, caregiver burden. Little is known about the impact of the health literacy of caregivers on the level of burden when providing care to individuals with complex care …

An Exploratory Study On How Math Stories Engage Young Learners In Mathematical Sense-Making, Maria Gigi Carunungan

Dissertations

This is an exploratory study of how pedagogy in the form of math stories, shapes young learners’ perceptions, motivations, and sense-making of math concepts. The research is presented in an exploratory documentary, with audio-video data collected through the iPhone. The pilot test of story-driven math learning solutions was conducted by two teachers with eight first grade children from diverse backgrounds in an afterschool program. This study also includes interviews of the teachers, educational leaders and specialists in primary school curricula, children’s literature, and math education. The results of the pilot validated the efficacy of story-driven math learning solutions for mathematical …

Pertenecemos: Trajectories Of Belonging, Knowing, And Discovering For Underrepresented Undergraduate Communicative Disorders And Sciences Students In California State Universities, Marcella C. Mccollum

Dissertations

The purpose of this study was to identify the ways that seniors in undergraduate programs in speech, language, and hearing sciences engaged with the department as they entered into their undergraduate programs, the factors that they considered when deciding whether to apply to graduate school in speech-language pathology, and perceptions of supports and barriers to entering into graduate school. This study partnered with seniors enrolled in public California university programs designed for future speech-language pathologists. A mixed methods design was utilized to provide a holistic account of student experiences. Three major themes emerged from the study. Throughout the process within …