Digital Commons Network^™

Cortical Activation As A Result Of Reading Stimuli For Students With Dyslexia And Typically Developing: New Insights From Functional Near Infrared Spectroscopy Neuroimaging (Fnirs), Elazab Mohamed Elshazly

Dissertations

As far as we know, there are few studies that investigated cortical activation using fNIRS and none has examined these hemodynamic changes associated with reading Arabic skills. This study evaluated the changes in cortical activation parameters in terms of oxyhemoglobin, deoxyhemoglobin, hemoglobin difference, and total hemoglobin concentrations observed in the brain (cerebral cortex) of 3^rd grade students during reading Arabic language tasks. The concentrations of cortical activation’s parameters were measured using a functional near infrared spectroscopy (fNIRS) device. The sample size was comprised of 14 3^rd grade students that were enrolled in an inclusive environment public school in …

Molecular Mechanisms Of Natural And Synthetic Compounds Against Breast And Colon Cancer, Aysha Hamad Alneyadi

Dissertations

Cancer is a complex disease with various causes, including genetic mutations, viruses, chemical agents, and lifestyle factors. Although numerous studies have been conducted to develop a cure or novel medications for cancer, no standout treatment has been found. In this project, the use of various natural and synthetic compounds as potential cancer treatments was investigated using triple-negative breast cancer (TNBC) and colon cancer cells. The cancer therapy strategies investigated were based on plant-derived therapuetic approaches including an essential oil (Origanum majorana essential oil), a pure phytochemical (Carnosol), and newly developed synthetic drugs (Chromenes drevatives; C1 and C2). This study …

Characterization Of Immunomodulatory Properties Of Manuka Honey: Potential Mitigation Against Colon Cancer, Razan Jamil Masad

Dissertations

The focus on using alternative natural products for cancer prevention and treatment has been increasing over the past decade. Among these natural products, Manuka honey (MH) has been extensively investigated for its antimicrobial, wound healing, and anticancer effects. The current study aimed to characterize the immunomodulatory capacity of MH using both in vitro and in vivo approaches and investigate its potential to modulate anti-tumor immune responses in a preclinical model of colorectal cancer. We demonstrate that MH can directly act on macrophages to induce gene expression of several inflammatory cytokines and chemokines and the production of TNF-a, a major proinflammatory …

Enhancing The Bioactivity And Functionality Of Camel Whey By Enzymatic Hydrolysis And Conjugation With Quercetin, Waqas Nabi Baba

Dissertations

This dissertation focuses on enhancing the bioactivity and emulsifying properties of camel whey through peptic hydrolysis and conjugation with quercetin, respectively. Peptic hydrolysis of camel whey using pepsin was performed using a general full factorial design (33) to study the effects of temperature (30, 37, and 45°C), times (120, 240, and 360 min), and enzyme concentrations (0.5, 1, and 2%) on antihypertensive and antilipidemic properties. The generated hydrolysates showed higher inhibition of pancreatic lipase (0.465 to 7.5 mg/mL), cholesterol esterase (0.240 to 1.243 mg/mL), and Angiotensin Converting Enzyme (ACE) (0.197 to 1.307 mg/mL) compared to control camel whey. Various bioactive …

An Inaugural, Qualitative Examination Of The Relationships Between People With Gender Nonconforming Expression And Social Anxiety, Chrystiana Jones

Dissertations

The focus in this research was on the experience of social anxiety associated with people with gender nonconformity. The study involved consideration of the issues people with gender nonconformity face as well as the mental impact that often occurs as a result of the rejection of other people in their lives, including their family and friends, as well as how and in what ways gender nonconforming people are affected by negativity in their environment. Data related to the problems that develop with such people, in particular the impact of stigmatization, discrimination, and social anxiety on people with gender nonconformity were …

Perceptions Of The Veterans Administration And Mental Health Treatment Seeking Intentions Among Veterans, Hilary Hines

Dissertations

Among the veteran population there is a trend of underutilizing mental health services despite the higher number of veterans with mental health diagnoses. Though previous research has examined barriers to mental health care such as stigma and a warrior mentality, there may be additional barriers that emanate from the system to which veterans are entitled and encouraged to use, the Veterans Administration (VA). This study examined the mediational relationships among perceptions of the VA, attitudes about seeking mental health treatment at the VA, and intentions to seek mental health treatment at the VA among veterans. Data from 96 veterans were …

The Effects Of Type Of Recall On Memory Accuracy In An Eyewitness Case Vignette, Ketura Mccroy

Dissertations

Memory and recall play an essential role in determining convictions in cases of eyewitness testimony. Eyewitnesses can appear confident in their statements, yet one’s memory and recall of a witnessed event can become distorted or manipulated in the process given that it is highly susceptible to various errors, biases, and misleading information such as suggestive questions. The purpose of this study was to further examine how two types of recall (i.e., cued and free) effect eyewitness testimony. In this study, 43 participants read a hypothetical case vignette of a murder crime scene; they were then randomly put into either a …

Stereotype Threat: A Proposed Process Model On The Impact Of Stereotype Threat On Self-Efficacy And Minority Performance, Sherese Stewart

Dissertations

Kingdon and Cassen (2010) indicated that historically there has been concern about the educational achievement of minority individuals. There is a need for research about the psychological mechanisms that play a part in the minority achievement gap. This document explored how stereotype threat impacts self-efficacy and minority academic performance and implications for cultural mistrust, imposter phenomenon, and self-fulfilling prophecies. All these factors have the propensity to place minority individuals at risk for low performance, leading to gaps in education. The population of focus for this review consisted of African Americans, Latinx individuals, and women. There has been limited research about …

Culturally Adapted Multiphasic Treatment Program: A Proposed Model For Increasing Successful Community Reintegration For Sex-Trafficked Black Teens, Shayla A. Wright

Dissertations

The commercial sex trafficking industry is a silent epidemic that has been sweeping across nations for centuries. Within the United States, Black teen girls make up the largest demographic of commercially sexually exploited children. Despite efforts, most treatment interventions and programs have limited success in preventing or reintegrating Black teen girls into their respective communities. Even more alarming, most treatment interventions do not consider the impact of culture and other lived experiences. This critical literature review identified and evaluated effective treatment modalities and programs for Black teens and discussed key components that
have been found for community reintegration. The research …

The Relationship Between Background Music And Symptomatology In Adults Diagnosed With Adhd, Michelle L. Spiewak

Dissertations

Individuals who have been diagnosed with attention-deficit/hyperactivity disorder (ADHD) often experience symptoms that interfere with their daily functioning, concentration, and performance at school, at home, in the workplace, and in social settings. Previous research has been conducted into the effects of background music on various facets of learning, mostly with populations of children and individuals without ADHD. The focus in this clinical research project was to examine the relationship between background music and symptomatology in 18 adult students between the ages of 18 and 26 years who had been diagnosed with any type of ADHD. Results did not indicate significance …

Impact Of Covid-19 On Latinx And Black Communities, Carolina Zuluaga

Dissertations

This critical literature review project explored the impact of COVID-19 on Latinx and Black communities. According to the Centers for Disease Control and Prevention, as of September 28, 2022, around 16% of COVID-19 cases in the United States were among Latinx people, and 14% of cases were among Black people (Centers for Disease Control and Prevention, 2022). Since COVID-19 began, clinicians have become more conscious of the effects of health disparities within racial and ethnic minorities, which has warranted increased advocacy by educating health and mental health providers and creating and providing resources to these communities and clinicians. The review …

A Program Evaluation Of The Reasons Some Educators Do Or Do Not Remain In The Teaching Profession, Joshua Karren

Dissertations

Abstract According to Sutcher et al. (2016), hundreds of thousands of teachers (eight percent of the overall United States teaching force) leave the profession annually for various reasons. These reasons include dissatisfaction with some parts of their jobs, including poor leadership, lack of control over teaching, family or personal reasons, pursuing a job outside of education, retirement, and financial reasons. The purpose of this study is to understand why teachers choose to stay at their school, why they leave certain schools and what school and district leaders can do to keep teachers in their classrooms. The context of this inquiry …

Narratives Of Perseverance By Latina Women Paving Their Way To Success In Science, Technology, Engineering, Art, And Math (Steam) Higher Education, Toni Carmichael

Dissertations

The purpose of this narrative study was to understand the experiences of successful Latina women attaining higher education in Science, Technology, Engineering, Art, and Mathematics (STEAM) and the challenges they have overcome along the way. Additionally, I sought to examine ways in which these students challenged the stigma of invisibility often attached to Latino communities. Representatives from Brazil, Ecuador, El Salvador, and Mexico, the participants of this study were seven women employed in various areas of STEAM with higher education degrees.

Cultural Capital and Feminist Cultural Studies provided the theoretical framework for this study. The three-dimensional narrative design was applied …

The Preparation Of Educators To Implement An Sel Curriculum, Helen Elayan

Dissertations

Professional development and training for adults in a Social Emotional Learning (SEL) curriculum are essential to the successful implementation of SEL for students. The purpose of my study was to determine the perceptions of teachers' professional development for implementation of a social emotional learning curriculum. The context of this study was a small independent school as well as schools throughout the US. The findings of my study indicated that educators in both contexts wanted training prior to student implementation, preferred training with peers, and wanted to only implement one schoolwide initiative per year. I recommended that leaders at all schools …

Assessing The Risk, Addressing The Need: A Mixed Method Approach To Designing A Strengths-Based, Post-Incarceration, Correctional Assessment For Women, Rashonda Johnson

Dissertations

Women are the fastest-growing segment of the incarcerated population, steadily increasing since 1985 (ACLU, n.d.). More than one million women are behind bars or have some involvement with the criminal justice system. The rapid growth of incarceration among women has led scholars and researchers to address the growing needs and risk levels that lead to increased recidivism rates. The creation of assessment tools specifically focused on female populations began in 1999. However, before this time, instruments were historically designed for men within the criminal justice system, and addendums were added to these tools to be used with female populations (Voorhis …

Heal The Hood: An Exploration Of Community And Organizational Assets In Chicago's Twentieth Ward, Jasmine James

Dissertations

This study seeks to expand upon Empowerment Theory (Rappaport, 1984) by utilizing Asset Based Community Development to better understand what community members and organizations deem as current strengths and needs of Chicago’s twentieth ward. The questions that this dissertation explores are What strengths exist in Chicago's 20th ward that can lead to empowerment for the community and What are community members' perspectives on what is needed in the 20th ward for community members to thrive? In order to explore these questions, this dissertation moves away from the terminology of “community needs assessment” and chooses to rather focus on Asset Based …

A Program Evaluation Of Prekindergarten Program In One School District, Alicia Eubank

Dissertations

I explored the potential impact of position and salary change on prekindergarten teachers in a public-school district in a southern state. I provided an educational, economic, political and moral/ethical analysis in partial support of this change for the district.

The current policy in the district is that the school year prekindergarten teaching positions are considered non-instructional. However, the summer prekindergarten program teachers are certified teachers as per state requirements. The new policy will make all prekindergarten teaching positions require state certification. This change would give them the financial pay and benefits included with the position change and keep them in …

Reclaiming And Reconceptualizing Accountability, Joseph Hailpern

Dissertations

This body of work contributes to the exploration of the intended and unintended consequences of the policy levers, referred to as education accountability policy, that have driven entire systems toward the inclusion of student performance data into educator performance ratings and the impact on the profession. Only from an extensive understanding of where we have been can a reimagined path forward be born to serve our youth and society better. This mixed methods dissertation does so by uncovering the legal landscape that defines the policy levers and bringing educators together in focus groups to delve deeply into these levers’ impact …

Increasing Life Skills While Decreasing Depression, Anxiety, And Stress In Transitional Aged Youth: A Person-Centered Mentorship Approach, Allanah Roberts-Headley

Dissertations

Transitional Aged Youth (TAYs) are young adults between 18-24 who have recently aged out of the foster care system and are now a part of the Extended Foster Care system (EFC). Unfortunately, this population is not guaranteed familial or social support. They have to rely on basic knowledge and skills obtained while in the foster care system to help with navigate their world. Most TAYs end up homeless, unemployed, and incarcerated. There is also a high pregnancy rate among TAYs. Due to the limited assistance they receive upon entering EFC, they are at a higher risk of experiencing mental health …

How Teacher Implemented Social-Emotional Learning Curriculum Impacts Collective Teacher Efficacy And Influences Teacher Beliefs About Job Satisfaction, Lisel Patrylow

Dissertations

“Teachers are the engine that drives social and emotional learning (SEL) programs in classrooms and schools, and their own social-emotional competence strongly influences their students” (Schonert-Reichl, 2017, p. 137). I wanted to examine if teachers benefited from teaching SEL. The purpose of my study was to examine if teachers perceived benefits to their Collective Teacher Efficacy (CTE) and job satisfaction beliefs when they taught SEL. The context of my research was elementary schools in one school district. I conducted surveys with elementary school classroom teachers and counselors. The findings from my study indicated that classroom teachers perceived that their SEL …

Student Proficiency On High School Math Assessments And Their Relation To College And University Math Readiness, Tiffany Robinson

Dissertations

Data indicate that a significant number of first-year college students were inadequately prepared in high school to complete university-level mathematics courses. The purpose of this study is to evaluate student proficiency on high school mathematics assessments and their relation to student preparedness for university-level mathematics courses. The context of my study is a cohort of diverse, high school senior students in one state in the United States who have shown proficiency on mathematics assessments. The methodology I used was a mixture of qualitative and quantitative data, comprised of student and faculty index surveys at the high school and university level …

The Efficacy Of Social And Emotional Learning For High School Students With Cognitive Disabilities, The Experiential Approach, Lawanda Fox

Dissertations

Social and emotional learning (SEL) is essential to all students' education across all grade levels. However, what does that look like at different developmental stages, and how can SEL best support learning and development for high school students with cognitive disabilities? Young people are becoming more aware of their identities and values in high school. They build upon many social and emotional competencies (self-awareness, self-management, social awareness, relationship skills, and responsible decision-making) developed throughout elementary and middle school. However, students with cognitive disabilities are more challenged than their peers without disabilities to accomplish these competencies. This study aims to identify …

Exploring The Strengths Within And Supports Needed For Women To Transition From Homelessness To Stability: A Strengths-Focused Mixed-Methods Study, Ann Smith

Dissertations

Homelessness is a real problem affecting many individuals with basic needs, and more than half of the people unhoused at any given time in the United States (US) are part of families with children. This mixed-method study examined the perspectives of mothers who experienced homelessness in the past in the US to understand the strength and support needed to transition back into a permanent home. The study then explored the perspectives of homeless service providers (HSPs) whose careers involve providing recommendations to unhoused individuals on how to balance their needs with supportive services. The qualitative narrative study consisted of a …

Machine Learning And Network Embedding Methods For Gene Co-Expression Networks, Niloofar Aghaieabiane

Dissertations

High-throughput technologies such as DNA microarrays and RNA-seq are used to measure the expression levels of large numbers of genes simultaneously. To support the extraction of biological knowledge, individual gene expression levels are transformed into Gene Co-expression Networks (GCNs). GCNs are analyzed to discover gene modules. GCN construction and analysis is a well-studied topic, for nearly two decades. While new types of sequencing and the corresponding data are now available, the software package WGCNA and its most recent variants are still widely used, contributing to biological discovery.

The discovery of biologically significant modules of genes from raw expression data is …

Neural Correlates Of Post-Traumatic Brain Injury (Tbi) Attention Deficits In Children, Meng Cao

Dissertations

Traumatic brain injury (TBI) in children is a major public health concern worldwide. Attention deficits are among the most common neurocognitive and behavioral consequences in children post-TBI which have significant negative impacts on their educational and social outcomes and compromise the quality of their lives. However, there is a paucity of evidence to guide the optimal treatment strategies of attention deficit related symptoms in children post-TBI due to the lack of understanding regarding its neurobiological substrate. Thus, it is critical to understand the neural mechanisms associated with TBI-induced attention deficits in children so that more refined and tailored strategies can …

Motion-Resistant Pulse Oximetry, Ludvik Alkhoury

Dissertations

The measurement of vital signs ? such as peripheral capillary oxygen saturation (SpO₂) and heart rate (HR) levels ? by a pulse oximeter is studied. The pulse oximeter is a non-invasive device that measures photoplethysmography (PPG) signals and extracts vital signs from them. However, the quality of the PPG signal measured by oximetry sensors is known to deteriorate in the presence of substantial human and sensor movements contributing to the measurement noise. Methods to suppress such noise from PPG signals measured by an oximeter and to calculate the associated vital signs with high accuracy even when the wearer …

Biomechanical And Psychophysical Underpinnings Of Balance Dysfunction In Individuals With Traumatic Brain Injury, Naphtaly Ehrenberg

Dissertations

Falls are a major burden on healthcare infrastructure, especially in older adults and even more so in older individuals that are living in institutions. According to data from the Centers for Disease Control and Prevention (CDC), from 2010 to 2020, unintentional falls were the leading cause of nonfatal emergency department visits for all age groups except among individuals from 15-24 years of age, where unintentional falls ranked a very close second to being unintentionally struck by or against. Among older individuals living in the community, approximately 30-35% fall at least once in a given year, and around three times as …

Sparse Methods For Blind Source Separation Of Frequency Hopping Rf Sources, Anushreya Ghosh

Dissertations

Blind source separation (BSS) is performed on frequency hopping (FH) sources. These radio frequency (RF) signals are observed by a uniform linear array (ULA) over a Spatial Channel Model (SCM) in four different propagation environments: (i) line-of-sight (LOS), (ii) single-cluster, (iii) multiple-cluster, and (iv) LOS with interference. The sources are spatially sparse, and their activity is intermittent and assumed to follow a hidden Markov model (HMM). BSS is achieved by utilizing direction of arrival (DOA) of the sources and clusters. A sparse detection framework is applied to obtain estimates of the sources' FH and DOA patterns. The solutions are binned …

Cu/Bnx Catalysts For Electrocatalytic Reduction Of Nitrogen And Nitrate Waste, Siming Huo

Dissertations

Ammonia (NH₃) is one of the most important chemicals to the whole human society. The invention of the Haber-Bosch process enabled the industrial production of NH₃. However, owing to the high capital costs of the centralized plant and the equipment and the negative environmental impact, it is no longer suitable for today's needs of human development. As a result, there is an urgent need to investigate sustainable approaches for ammonia production. Among those reported studies, nitrogen reduction (NRR) and nitrate reduction reaction (NO₃RR) are considered applicable in the future. However, after decades of studying …

Trustworthy Machine Learning Through The Lens Of Privacy And Security, Thi Kim Phung Lai

Dissertations

Nowadays, machine learning (ML) becomes ubiquitous and it is transforming society. However, there are still many incidents caused by ML-based systems when ML is deployed in real-world scenarios. Therefore, to allow wide adoption of ML in the real world, especially in critical applications such as healthcare, finance, etc., it is crucial to develop ML models that are not only accurate but also trustworthy (e.g., explainable, privacy-preserving, secure, and robust). Achieving trustworthy ML with different machine learning paradigms (e.g., deep learning, centralized learning, federated learning, etc.), and application domains (e.g., computer vision, natural language, human study, malware systems, etc.) is challenging, …