Digital Commons Network^™

Refill Friction Stir Fastener Repair In Aa7050-T7451, Andrew John Curtis

Theses and Dissertations

The majority of Refill Friction Stir Spot Welding (RFSSW) is used to join two materials together oriented in a lap joint configuration. In this study, RFSSW was investigated and tested using an unconventional configuration setup, a hole/plug insertion approach. RFSSW was tested as a means of repairing a cracked rivet hole due to excessive use conditions. This was done by inserting a plug into a hole and using the RFSSW process to bond the plug to the base material. Machine and tool limits were investigated to determine if a refilled plug repair was possible and if complete mixing between plug/hole …

The Effects On Self-Regulation And Productive English Proficiency Of The Application Of Mental Contrasting And Implementation Intention (Woop) In Esl Writing Classes, Ka Yue Chan

Theses and Dissertations

The present study looked at the effects of a self-regulatory goal setting framework (WOOP) implemented in writing classes that were developed by Oettingen (2018) using Mental Contrasting and Implementation Intentions (MCII). The study examined English learners' development on self-reported self-regulation and proficiency levels in an Intensive English Program (IEP) in the United States over the course of two 14-week semesters. A total of 238 English Language Learners participated in the study and took the Short Self-Regulation Questionnaire (SSRQ) where the scores were analyzed to determine development over time. The analysis showed no statistically significant differences. However, experimental group participants' self-reported …

Pivotal Response Treatment To Decrease Challenging Behavior And Increase Functional Communication In Preschool Children With Developmental Delays, Kalie Alexandra Gilmour

Theses and Dissertations

After a review of the literature on Pivotal Response Treatment (PRT) in young children with developmental delays, less was known on its effects on challenging behavior and functional communication in preschool age children receiving services in a traditional public school. A multiple baseline design across three participants was used to evaluate the effects of PRT on the functional communication of three preschool students with developmental delays. Based on a functional analysis, we also observed the effects of PRT on challenging behavior. A visual analysis of the data revealed a functional relation between PRT and functional communication and provided promising evidence …

Quantifying Speech Pause Durations In Typical English Speakers, John Hoffer

Theses and Dissertations

This study examines filled and unfilled pause durations between utterances in the speech of 60 people with no language disorder. It also evaluates the proportions of different pause lengths, examines the location of pauses within an isolated speech sample, and compares speech pause in male speakers and female speakers. Using speech samples gathered from a picture description task, Praat acoustic analysis software was used to segment C-units and measure pause duration between utterances (Boersma & Weenink, 2022; Öktem et al., 2021). Descriptive statistics were used to analyze these data, including pause duration mean and standard deviations. Pause mean durations ranged …

Accounting For Oral Language Skills In Children With Dyslexia: A Systematic Review Of The Literature, Natalie Kay Olsen Miller

Theses and Dissertations

Purpose: In the present study, we conducted a systematic review to determine whether studies involving children with dyslexia include the assessment of oral language skills in their assessment batteries across various professional disciplines. Overlooking assessment of oral language in children with dyslexia may result in the misinterpretation of research findings and applications to children who present with both dyslexia and Developmental Language Disorder (DLD) or experience secondary oral language deficits. Method: According to the Preferred Reporting Items for Systematic Reviews and MetaAnalyses (PRISMA) guidelines, we searched the Elsevier Scopus database and obtained and analyzed 764 articles, up to 40 articles …

Design, Synthesis And Immunological Testing Of Minimal Oligosaccharide Epitopes For Glycoconjugate Vaccines Targeting Capsular Polysaccharides Of Serotypes 3, 4, 7f And 9v Of Streptococcus Pneumoniae, Seth A. Taylor

Theses and Dissertations

The rise in antibiotic resistant strains of bacteria has led to the need for new methods of combatting bacterial infection. Since the surfaces of bacteria are covered in uniquely patterned capsular polysaccharides, vaccines targeting these polysaccharides have become a popular field of research for protection against pathogenic bacteria. Though licensed polysaccharide vaccines are commercially available, they lack the efficiency to protect patients that are immunocompromised or at high risk because they elicit T cell independent immune responses, resulting in low-affinity antibodies. To elicit a T cell dependent response and thereby recruit B cells that produce high-affinity antibodies, a vaccine was …

Investigating The Use Of Translational Methods To Characterize Therapeutic Interventions In Models Of Pulmonary Disease, Ashley Rae Chang

Theses and Dissertations

Idiopathic Pulmonary Fibrosis (IPF) is an interstitial lung disease with no known cause or cure. IPF has an incidence of 75/1,000,000 of the population, predominately in men over the age of 60. This relatively rare disease develops in a chronic and progressive way, ultimately leading to death within two to five years of diagnosis. Our use of translatable methodologies in the bleomycin mouse model of IPF led to the novel identification of the similarities between the average percent loss of lung function in previous human clinical trials to that of our mouse model data. There is no treatment for IPF …

Soft Contact Lens Tear Film Proteomics For Clinical Diagnostic Biomarker Discovery, Robert Kimball Roden

Theses and Dissertations

Human tear film is an accessible biospecimen rich with useful biological information. As tear protein biomarkers for both ocular and systemic diseases have been identified in tears, efforts are being made to create point-of-care tests useful for clinical diagnoses. However, there are significant obstacles to tear diagnostics, including inadequate sampling methods and biomarkers with insufficient sensitivity and specificity. Furthermore, tear film diagnostics are particularly challenging for dry eye disease (DED) patients, where low tear volume makes sampling more difficult and the multifactorial nature of DED makes identifying the exact pathological subtype very complex. As soft contact lenses (SCLs) are designed …

Cesium Voltilization In Lif-Bef2: Predicting Release In The Event Of Fhr Fuel Failure, Johnny Hedrick Williams

Theses and Dissertations

This work demonstrates how ICP-MS can be employed to evaluate cesium volatilization from LiF-BeF2 (Flibe) salt with ab initio molecular dynamics studies used as corroborating data to better understand cesium behavior. Using mixtures of Flibe with 2 mol% CsF, it was found that cesium was stable within the salt melt at temperatures between 500-650°C over a time span of 8 hours. At 800°C, cesium vaporized from the salt at a rate of 0.83% / hr with a mass flux of 0.0023 g Cs / cm2hr. The atomistic modeling results show poor solvation of Cs at 500°C and 800°C, with stability …

The Performative History Of Tomboys In Anglophone Literature Prior To Little Women, Kimber Palmer

Theses and Dissertations

This paper examines the expansive history of literary tomboys in the century preceding Louisa May Alcott's Little Women (1868). Applying concepts from gender performativity theory, it explores earlier and previously overlooked portrayals of tomboys (or, alternatively, "hoydens" or "romps"), especially in Richard Brinsley Sheridan's A Trip to Scarborough (1777), Isaac Bickerstaffe's The Romp; A Comic Opera in Two Acts (1786), Mary Wollstonecraft's A Vindication of the Rights of Woman (1792), Jane Austen's Northanger Abbey (1817), and E.D.E.N. Southworth's The Hidden Hand (1859). Because the tomboy phenomenon emphasizes that gender roles must be learned and can be resisted, tomboy characters are …

Gratitude Training For Promoting Subjective Well-Being: A Randomized Controlled Trial Comparing Journaling To A Personalized Menu Approach, Conner Lee Deichman

Theses and Dissertations

Research suggests a link between gratitude and subjective well-being exists. Research on gratitude practices have shown to increase gratitude, subjective well-being, and other related outcomes. However, the efficacy of gratitude practices may be limited by the rote application of the gold standard gratitude practice--the gratitude journal. Such findings suggest that a more comprehensive, adaptable, and flexible gratitude practice may be needed. This study examined the efficacy of the My Best Self 101 (MBS101) gratitude module: an online gratitude resource that provides psychoeducation about gratitude along with a menu of empirically based gratitude practices. Using a randomized controlled design method, this …

Family Of Origin Stress, Posttraumatic Stress Symptoms, And Resource Loss For Couples During Covid-19: A Longitudinal Analysis, Betsy Hughes Barrow

Theses and Dissertations

The pandemic affected daily life on an unprecedented global scale resulting in the need for adaptation and flexibility to cope with ongoing stress, uncertainty, and loss that may affect couple relationships. Understanding resource loss in the context of mass stress events is critical because resource loss has been defined as the primary agent of stress (Hobfoll, 1989). As such, it is important to understand what factors may have shaped the degree of resource loss incurred during the pandemic. Extant research implies that considering early life adversity may be useful to explore as it may be a form of resource loss …

Differential Levels Of Nutrients And Heavy Metals In Tilapia Collected From Drains In Egypt, Emily Burch

Theses and Dissertations

Tilapia is one of the most widely cultivated and consumed fish globally. In terms of human health, tilapia is an excellent source of protein, polyunsaturated fatty acids, and micronutrients. Tilapia and other aquatic species have become increasingly susceptible to contamination, as anthropogenic activities have been increasing around the world. Anthropogenetic activities often introduce high levels of contaminants, including heavy metals, into the marine environment. These contaminants often do not biodegrade, and they are absorbed by aquatic species. Contaminants can bioaccumulate and proceed in biomagnification up the fish food chain putting consumers at an increased risk of exposure. Heavy metals can …

Securing Wireless Communication Via Information-Theoretic Approaches: Innovative Schemes And Code Design Techniques, Morteza Shoushtari

Theses and Dissertations

Historically, wireless communication security solutions have heavily relied on computational methods, such as cryptographic algorithms implemented in the upper layers of the network stack. Although these methods have been effective, they may not always be sufficient to address all security threats. An alternative approach for achieving secure communication is the physical layer security approach, which utilizes the physical properties of the communication channel through appropriate coding and signal processing. The goal of this Ph.D. dissertation is to leverage the foundations of information-theoretic security to develop innovative and secure schemes, as well as code design techniques, that can enhance security and …

Exploration Of The Impact Of Gender-Affirming Care And Social Support On Executive Functioning And Mental Health In Gender-Diverse Autistic And Non-Autistic Adults, Karys Michaela Normansell-Mossa

Theses and Dissertations

Between 4.8% and 26% of adults presenting to gender dysphoria clinics have an autism diagnosis. Both autistic people and gender-diverse people have higher rates of mental health conditions including anxiety and depression and more difficulties with executive functioning, all of which impact quality of life. Some work suggests that gender affirmation leads to better mental health outcomes, including better executive functioning, but this has not been studied directly in autistic adults who identify as gender-diverse or transgender. As such, we elected to explore the relationships among these variables at this intersection of gender diversity and autism. In a sample of …

Stochastic Worst-Case Test Vectors For Asic Devices In Single Event Environment, Mostafa Hemeda

Theses and Dissertations

Charged particles and energetic particles can impact the integrated circuit, referred to as single event effects (SEE). Nuclear reactors and space radiation can produce these particles. These effects can negatively affect the reliability and performance of electronics. When SEE occurs, a transient current is created, which can cause electronic devices to have incorrect outputs and ultimately fail. As a result, ensuring the reliability of ASIC circuits is a significant concern.

This thesis discusses the different fault types, then discuss the soft error and, in particular, the Single Event Transient (SET) and its causes and models. Then, this thesis proposes a …

Influence Of Organizational Culture And Leadership Style On Disputes In Construction Projects – A Contractor’S Perspective, Omneya Nader Mekhaimer

Theses and Dissertations

Over the recent decades, studies on organizational culture and leadership practices have gained global attention across business management literature given their implicit influence on the organization’s success. However, very few studies tackled these practices in the construction industry research especially in Egypt. Unlike other industries, the construction industry is known to be a complex, dynamic, and adversarial industry sector due to its project-oriented nature where various stakeholders are involved and each have their own objectives. Consequently, construction disputes are inevitable to occur whereby previous studies revealed that the level of disputes have propagated throughout the years.

This research aims to …

Narrating & Living With Loss: Towards An Ethnography Of Grief, Fayrouz Ibrahim

Theses and Dissertations

Through this paper, I seek to approach grief through how it is lived, the nexus between loss, and the sought-for physical abstractions through memory, objects, and materials to live with/despite such a loss. This paper is a phenomenological and ethnographic research project on the curatory rituals and practices that individuals employ in keeping lost loved ones alive in their everyday. I explore grief through a multidisciplinary and multimodal conceptualization rather than simply through cultural and social practices such as burial and mortuary rituals. The research follows the grief narratives of different individuals in Egypt in inquiring about the objects, memories, …

Spatial Autocorrelation Analysis For Construction Sites, Raghda Moharram

Theses and Dissertations

This study investigates the usefulness of spatial autocorrelation analysis in construction sites. The objective is to provide construction managers with insights into the site's performance, identify potential areas for improvement, and ultimately lead to cost and time savings and improved project quality. To achieve this objective, the study identifies significant spatial autocorrelation variables for various applications in construction and analyzes their impact on the site's efficiency and potential problems.

The potential applications where spatial autocorrelation analysis could be useful were identified, including schedules, progress, earned value measures, safety incidents, workers' densities, equipment densities, energy expenditure, and quality non-conformity. A framework …

Transport Of Suspended Sediments And Phosphorus In An Agricultural Watershed: A Case Study Of The Money Creek Watershed, Central Illinois., Oghenevwede Efobo

Theses and Dissertations

Suspended sediment and phosphorus are among the major pollutants of stream ecosystems. Suspended sediment has been documented as vector for nutrient transport, specifically phosphorus, in streams. Sources of suspended sediments include agricultural fields, channel sediments, and streambanks. Suspended sediments within the stream channel could fill up reservoirs over time thus, reducing reservoir storage capacity. Suspended sediments can cover breeding and nesting areas of aquatic habitats, leading to their displacements. Sources of phosphorus include point sources such as wastewater treatment plants and industrial effluent, and nonpoint sources such as agricultural fields and urban runoff. Phosphorus is a limiting nutrient in freshwater …

Exploring Surface Silanization And Characterization Of Thin Films: From Surface Passivation To Microstructural Characterization Of Porous Silicon/Silica, And Exploratory Data Analysis Of X-Ray Photoelectron Spectroscopy Images, Behnam Moeini

Theses and Dissertations

Surface chemistry plays a key role in science and technology because materials interact with their environments through their surfaces. Understanding surface chemistry can help alter/improve the properties of materials. However, surface characterization and modification often require multiple characterization and synthesis techniques. Silicon/silica-based materials are technologically important, so studying their surface properties can enable future advancements. In this dissertation, I explore surface modification and characterization of different types of Si/SiO2 thin films, including silicon wafers, fused silica capillary columns, and oblique angle sputtered Si/SiO2 thin films. In Chapters 2-5, I first present a method to rapidly silanize silica surfaces using a …

Visions Of Mary: Patria As The New Mestiza Madonna In Alvarez's In The Time Of The Butterflies, Mila Argueta

Theses and Dissertations

Alvarez’s In the Time of the Butterflies is a fictional depiction of three sisters who are lauded for their role in ending the supremacist, womanizing, and terror-inspiring reign of Trujillo. While, one character, Patria, seems to represent the traditional, and at times cloistered, life of a Dominican wife and mother (reflecting the Malinche and sufrida archetypes), the text also shows her transformation into one of the most vital figureheads of the revolution. I find that when she joins the revolution, she comes as a transformed Marian-figure. Unlike Ibez Gomez Vega and other feminist scholars who have categorized Patria as one …

Mental Health Literacy In Polynesian Native Hawaiians And Other Pacific Islanders: A Pilot Cross-Sectional Study, Kealoha Sarah Reiko Snow

Theses and Dissertations

Background: High prevalence of mental health problems and underutilization of mental health treatment are more severe among the Native Hawaiian and Other Pacific Islander (NHPI) population and remain misunderstood and understudied. Examining mental health literacy (MHL)–the knowledge and beliefs about mental disorders which aid their recognition, management, or prevention–has been shown to identify barriers to seeking and receiving care. Objectives: This study aimed to assess the level of MHL in Polynesian NHPIs and identify associated demographic variables. Methods: Data for this pilot cross-sectional study were collected from 298 US Polynesians via an online questionnaire of the Mental Health Literacy Scale …

The Use Of Artificial Intelligence In Higher Education: A Study On Faculty Perspectives In Universities In Egypt, Farah S. Sharawy

Theses and Dissertations

Artificial Intelligence (AI) is an emerging technology that is transforming various aspects of society, including higher education. This paper examines faculty perspectives from five different institutions; The American University in Cairo (AUC), The German University in Cairo (GUC), The Arab Academy for Science and Technology (AAST), Ain Shams University, and Cairo University, on the use of AI in higher education in teaching and learning in Egypt, with all its challenges and resources available to support it, and how it can be used to achieve equity and accessibility. This research was conducted through a qualitative study using semi-structured one- on-one interviews …

Computational Qsar & Molecular Docking Of Anti- Inflammatory Asthma Drugs Against Human Serum Albumin: A Computational Approach Towards Drug Design & Drug Discovery, Sara Alkarimy

Theses and Dissertations

There is a growing need for medications to fight deep-rooted and new diseases because of their socioeconomic consequences, as evidenced by the COVID-19 epidemic which slowed down the economy and affected the social life of mankind globally. This work is a step among many other steps undertaken by research around the world in order to achieve this objective. Asthma is one of the diseases that causes the death of thousands of lives every year. This work aims at the development of novel anti-inflammatory asthma drugs where the quantum chemical descriptors of eleven anti-inflammatory asthma drugs including Ambroxol, Amoxicillin, Budesonide, Fluticasone, …

Nutrient Optimization For Vegetable Production Under Decoupled Aquaponics Using Brackish Water, Salma Walid Hany Ahmed Abdelfattah

Theses and Dissertations

As the world moves to more sustainable agriculture methods in the agribusiness industry, decoupled aquaponics is recognized as one of the newest techniques currently being utilized to achieve more local food security. As the topic is still freshly new within the industry, a finite number of publications and studies have been made that address the topic hands-on with its many variables. Subsequently, in this paper, an experiment was conducted to assess the most optimized production conditions of both lacinato kale (Brassica oleracea var.palmifolia) and Swiss chard Bright Light (Beta vulgaris ssp. Cicla var. flavescens) plants through the utilization of a …

International Human Rights Through Queer Theory: A Discursive Analysis Of The Russian, Lithuanian, And Kyrgyz Lgbtq+ Lived Experience Within The Global Paradigm, Mariem Youssef

Theses and Dissertations

This thesis attempts to shed light on the subordination of international human rights law to that of the paradigm of international relations through asserting the existence of US Empire i.e., that emulates historical empires, British and French, which aims to emancipate subjugated minorities, formerly women and presently LGBTQ+ individuals from their national oppressive regimes. This is achieved through a discussion of pervious literature that discusses queer theory with a special focus on Russia, Lithuania, and Kyrgyzstan as the main case studies. While the overt intentionality of the “empire” is to protect LGBTQ+ individuals through perpetuating the prototype of the “International …

A Novel Approach Using Integrated Greywater Treatment System Applying Net Zero Wastewater Concept For Sustainable Urban Communities, Mianda Khattab

Theses and Dissertations

We are blessed with endless resources that are naturally existing in our world and we fully rely-on without envisioning the bigger picture of what would happen if these resources came to an end, or how can we even ensure sustainable lives by regenerating or reusing or utilizing the naturally existing resources? The surrounding ecosystem, the land we live on, the air we breathe, the water we drink and use for cooking, laundry, shower, irrigation, and many other usages are examples of the resources that we, as global users, are taking for granted.

It is a common knowledge that we are …

The Role Of Online Discursive Action In Subjects' Emancipatory Repositioning In Egypt: Assault Police Case Study, Christine Saad Guirguis Ma

Theses and Dissertations

The current study's central question is how social change is discursively constructed. I studied an online feminist social movement that sparked in Egypt on Instagram in July 2020 and labeled "Assault Police." Within the critical social theory and feminism framework, I reviewed the literature on (critical) discourse, social change, and social movements. I tried to unravel the complexity around emancipation as a vital concept in the current study. I located and discussed areas of tension and identified a conceptualization that loosens the theoretical entanglement around it. The research problem sought to specify how the online discursive action facilitated desired …

The Fall And Rise Of Bengali Muslim Conciousness: Conceptualising The Identity Of The Bangla Universal, Habib Khan

Theses and Dissertations

The emergence of modern-nation states saw the end of the empirical era of exploitation and exercise of inherent racist tendencies towards the 'other'. However, the effect of that colonial system is still ever-present in the creation and governance of these newly independent states. While every new state aims to be 'modern', they adopt the international legal framework of the West as their own - a system they had initially wanted to escape. The concept of Muslim universality in the form of the ummah should have freed Pakistan from the shackles of its former colonial masters. Instead, this phenomenon was replaced …