Digital Commons Network^™

Determinants Of Physicians' Brain Drain In Egypt, Mennatallah Elbeheiry

Theses and Dissertations

Egypt is enduring a significant shortage of physicians, despite the annual graduation of approximately 10,000 medical students from its 27 medical schools. In 2016, the physician density was alarmingly low, with only one doctor per 12,285 people. This shortage is exacerbated by a physicians’ brain drain, as Egypt is a leading exporter of physicians to countries like the United Kingdom and Australia. As of 2020, the Egyptian Medical Syndicate reported 212,835 registered physicians, yet 56 percent of them work abroad, and only about 62,000 are actively employed in public hospitals, serving a population of over 110 million. The government’s efforts …

Navigating The Future Advancing Autonomous Vehicles Through Robust Target Recognition And Real-Time Avoidance, Mohammed Ahmed Mohammed Hussein

Theses and Dissertations

The problem being tackled by this thesis is a very important one and very relevant to our days and times: it is about making improved target recognition and enhanced real-time response skills in AVs under simulated conditions. Our plan is to put some enhanced sensory capabilities into these vehicles and see if that makes them safer and more reliable. We are using as our base a particular object recognition algorithm (YOLOv7) and a particular simulation environment (CARLA). We utilized the CARLA 0.9.14 simulator on Ubuntu 20.04 as a more stable option than the initially used CARLA 0.9.15 on Ubuntu 22.04, …

Harmony Or Discord? A Study On The Alignment Between National Objectives And Reformed Social Studies Textbooks In Egypt, Lina Yehia

Theses and Dissertations

Education systems, in many parts of the world, have served as a channel for communicating national goals to students, and Egypt has not been an exception. This study examines how public textbooks effectively align with equipping future generations of Egyptians to fulfill the nation’s development policy goals set for 2030. Utilizing a qualitative research design, this study employed textbook and document analyses of the published national policy goals of the current administration, along with the most recently reformed social studies textbooks of Grades 4, 5, and 6, a product of EDU 2.0. Based on an analysis of national documents, the …

Metakaolin-Based Geopolymer Concrete; Synthesis, Development And Characterization, Heba Fouad

Theses and Dissertations

Geopolymers are rendered as an essential sustainable replacement to the widely used Ordinary Portland Cement (OPC) which causes immense carbon dioxide emissions, hence a detrimental impact on society’s health and the environment. Geopolymers are three-dimensional networks of polymerized tetrahedral silicate and aluminate in the form of Q4(4Al), Q4(3Al) and Q4(2Al) which act as the principal binding phase in concrete. Past research has reported the synthesis of geopolymers from different aluminosilicates precursors, their characterization, and their wide range properties. However, previous studies still have not properly investigated effective range of synthesis ratios for a particular source material, optimum curing regimes, short- …

Enhancing Concrete Sustainability With Self-Healing Technologies, Al Shimaa Abdullatif

Theses and Dissertations

Thanks to its strength, durability and affordability, Portland cement concrete is the most commonly used building material worldwide. However, concrete cracking is inevitable due to numerous factors including shrinkage, exposure to external chemicals, internals reactions, excessive loads, to name but a few. Self-healing is a promising technique that can enable concrete to autogenously heal cracks and alleviate much of the damage. Such healing can without a doubt extend the service life with less need for external repair works therefore it contributes to sustainability. Over the years, several means of self-healing agents have been explored including bio-based procedures and the incorporation …

Identifying Challenges Faced By Small And Medium Enterprises (Smes) In The Middle East And North Africa (Mena) Region Through Total Quality Management, Mohamad Atef

Theses and Dissertations

Recently, Small and Medium Enterprises (SMEs) have become recognized as an important driver of global economic growth and innovation. This phenomenon is particularly evident in the MENA region, where small and medium-sized enterprises (SMEs) make a significant contribution to the businesses. SMEs offer significant benefits in terms of job creation, revenue generation, and fostering economic diversity. Although SMEs have a vital contribution in the economy of the MENA region, SMEs face many challenges that hinder their development and long-term viability. Focusing on these challenges is very important for fostering a vibrant and resilient economic environment. The objective of this thesis …

Using Nano-Ities For Detection Of Metal Ions In Complex Aqueous Solutions, Mohammed Muzammil Nishar Ahmed

Theses and Dissertations

Recent urbanization has induced a rapid increase in heavy metal exposure to humans. The exploitation of heavy metals for economic gains coupled with poor and economically infeasible recycling methods have led to poor management of heavy metal wastes, which has opened up several pathways for heavy metals to enter the human body. Such heavy metals target many vital organs, but the early symptoms are common and difficult to diagnose. Severe symptoms appear in later stages and are very expensive to treat and the damage caused to the health are not typically reversable in such later stages. To counter this issue, …

Eurobond Performance In Emerging Markets: Do Economic Freedom, Contagion Effects, And Strategic International Relations Matter?, Nourhan El Rouby

Theses and Dissertations

This paper studies the factors moving the Eurobond prices and credit ratings issued by emerging markets. By observing a set of variables, including economic freedom, contagion effects and strategic international relations, the study was able to provide a thorough analysis of their impact on Eurobond performance. The research was able to identify significant determinants of Eurobond prices and credit ratings through utilizing panel data from 20 emerging markets over a period of April 2018 to September 2023 where we applied fixed effects linear regression and ordered logit models. The findings resulted that economic freedom, in specific enforcement of contracts, and …

Identifying School-Wide Inequities: Action Research Conducted Using An Equity Audit To Inform Annual School Planning For A Pre-K–8 School, Janine Casella

Theses and Dissertations

This action research study aims to identify and address equity gaps within a PK-8 New Jersey school by leading a professional learning community (PLC). The study will use action research methods to conduct an educational equity audit, which will inform the annual school plan and create a leadership action plan to stimulate organizational change. Traditionally, teachers at the research site have used Data-Driven Decision Making (DDDM) cycles, but this study will integrate Critical Data-Driven Decision Making (CDDDM) cycles, including an equity audit analyzed in PLCs. The audit will identify patterns of inequity and identify strategies to address them. The study …

Deciphering Evolutionary Co-Option By Studying The Origin Of Self-Fertility In Caenorhabditis Nematodes, Jonathan P. Harbin

Theses and Dissertations

In my research, I examined the characteristics of male and female sex-determination mutants in C. nigoni and investigated the regulatory pathway they define. This work tested whether flexibility in the sex-determination pathway was a preexisting condition that favored the origin of self-fertility in Caenorhabditis. Furthermore, I developed an approach for using interspecies hybrid mutants to assess the robustness of the C. nigoni pathway. My findings showed that the C. nigoni pathway is highly robust and canalized, suggesting that changes leading to self-fertility must have involved the impairment of this canalization in the germ line, to allow eventual alteration of germ …

School Administrators Making Sense Of Wellness Issues And Technology Policy: A Qualitative Instrumental Case Study, Allyson Michelle Rose

Theses and Dissertations

Technology use has been identified as a key contributor to the decrease in youth mental health (Children’s Bureau, 2019; Lebrun-Harris et al., 2022; Dwyer, 2022; Mojtabai et al., 2016; Yasakci, 2019; Odgers & Jensen, 2020). The purpose of this qualitative instrumental case study was to investigate how school district administrators are addressing wellness issues that are developing in elementary aged students due to technology use. The intent of this study was to use the theory of sensemaking (Weick, 1995) to investigate how administrators create policies that respond to the current wellness crisis arising from technology usage in public elementary school …

Nanofiber-Hydrogel Composite Scaffold Fabrication Methods For Peripheral Nerve Regeneration, Jacob Lee Carter

Theses and Dissertations

Nerve graft conduits (NGCs) are a rapidly advancing field for treating peripheral nerve injuries that aim to guide the growth of regenerating axons across damaged gaps. A more effective NGC can be manufactured by combining the use of nanofibers to act as guidewires within a 3-D hydrogel that imitates the extracellular matrix of nerve tissue. Several methods have been developed to embed aligned nanofibers in an ordered architecture within a hydrogel matrix. The first method involves layer-by-layer additive manufacturing to create NGCs with rows of polycaprolactone (PCL) nanofibers surrounded by a gelatin methacrylate (GelMe) hydrogel in a 3-D structure. A …

Development Of Bio-Based Organogels For The Replacement Of Silicone Elastomers In Cosmetic & Personal Care Applications, Courtney A. Lemasney

Theses and Dissertations

Silicone elastomers (SE) are a major component in many cosmetic and personal care products, providing excellent spreading properties, leaving a dry, silky feel on the skin. Unfortunately, the manufacturing of silicone is a high energy consuming process, and these products are not biodegradable. Capryloyl/glycerin/sebacic acid (CGS) copolymers are an economical, nontoxic platform for synthesizing bio-based materials with tailored properties. These polyester networks are formed through esterification with water as its only side product. By altering feed ratios and reaction conditions, final products can vary from branched fluids to highly crosslinked elastomers. This thesis investigated controlling the crosslink density of the …

Incorporating Culturally Relevant Practices To Improve Self-Efficacy And Engagement For Students With Disability Labels, Jennifer Chestnut Zingaro

Theses and Dissertations

The purpose of this study was to explore the lived experience of middle school students with disability labels in the pull-out resource ELA setting when their teacher included culturally relevant practices. This study utilized qualitative teacher research inquiry methods, and data collection methods included student surveys, teacher journaling of class discussions and observations, and examination of student work samples. This study came about through the lack of culturally relevant pedagogy in the segregated, special education middle school ELA program. Students with disability labels who test below grade level on standardized assessments are placed in a small group, homogeneous classroom with …

Dissecting The Interplay Of Protein Synthesis And Degradation Pathways In Cellular Adaptation To Stress, Brittany Friedson

Theses and Dissertations

Adaptation to stress requires cells to reprogram transcription, translation, and proteolytic pathways. Although much is known about the response of each program, it remains unclear how they coordinate following stress. My studies in S. cerevisiae identified the Cdk8 kinase module (CKM) of the Mediator complex as a new player in coordinating these processes. It is well established that the CKM consists of four highly conserved proteins (cyclin C, its cognate kinase Cdk8, and two structural proteins Med12 and Med13) and predominantly represses a subset of stress responsive genes in yeast. We demonstrated for the first time that the CKM also …

Low-Power Sensor Design And Fusion To Edge Devices For High-Speed Object Detection And Enhanced Soldier Situational Awareness, Scott Patrick Wood

Theses and Dissertations

Threat detection and physiological monitoring of soldiers from fused sensor data collected in real time is currently limited to running deep neural networks with substantial computing needs. The lack of data acquisition from sensor readings and efficient detection of novel enemy signatures motivates the need for a low-power, low-cost, wireless multisensor fusion computing system. We propose the current trends in Internet of Things to deploy a chargeable, wireless multi-channel acquisition system that can be interfaced to a high speed, Single Board Computer (SBC) such as the NVIDIA Jetson Orin capable of running object detection models, such as YOLOv7-tiny to enable …

Identifying The Challenges That Hinder Research Productivity In Academia: Evidence From Somaliland And The Way Forward., Khalid Jama

Theses and Dissertations

In any nation, research is the primary force behind innovation and progress. It contributes to the Economic growth, global competence, and social progress. Research productivity is highly valued in the scientific community. Scientific community research is regarded as the key factor determining academic recognition, financial support, and academic recognition. Nonetheless, the output of research faces difficulties in many sub-Saharan African nations. This study aims to understand what limits the research publication in Somaliland. The study adopt a mixed methods approach to understand and analyze the main reason behind the research and publication limitations in Somaliland’s higher education. Individuals from various …

Understanding Family Experiences Of Iep Meetings And Building Skills To Empower Families At The Iep Meeting, Elizabeth J. Golini

Theses and Dissertations

Since the Individualized Education Program (IEP) meeting is so important both to a student’s progress and educational growth as well as the school’s legal obligations, it is imperative that researchers work to understand parent perceptions of Individualized Education Program meetings (Fish, 2006). Family participation and advocacy are also important at the IEP meeting (Boshoff et al., 2016; Cavendish & Connor, 2018; Duquette et al., 2011; Fish, 2006). This study examined the family’s perceptions of the IEP process and meeting for their child through semi-structured interviews. In order to support the family at the IEP meeting, families participated in coaching sessions …

To Belong Or Not To Belong: Bipoc First-Generation Community College Students’ Experiences, Christine Orbeta

Theses and Dissertations

Using narrative interviews, this study explored the experiences of belonging among eight first-generation college students (FGCS) who identify as Black, Indigenous, and People of Color (BIPOC). By applying Strayhorn's Belonging and Crenshaw's Intersectionality Framework, this study sheds light on the challenges and benefits BIPOC FGCS encounter as they strive for academic success at two-year institutions within the City University of New York (CUNY) where approximately 44% of CUNY's student body comprises FGCS (CUNY, 2019). According to participants, families and institutions played significant roles in shaping students' sense of belonging. It also highlights the intricate negotiations BIPOC FGCS undergo as they …

Sweating The Small Stuff: Exploring Consequence Assignments And Academic Outcomes In A No-Excuses Charter Network, John G. Stevens

Theses and Dissertations

Schools utilize a range of consequences to maintain order and safety. Some employ zero-tolerance policies accompanied by exclusionary tactics like suspension (Martinez, 2009; Muschert et al., 2014). Suspensions are criticized for their disproportionate assignment to students who are Black, male, assigned an IEP, and receiving lunch assistance (Cholewa et al., 2018; Skiba et al., 2002), as well as their deleterious associations with academic achievement (Chu & Ready, 2018; Morris & Perry, 2014; Noltemeyer et al., 2015). Charter schools espousing a no-excuses philosophy often adopt a “Sweat-the-Small-Stuff” (STSS) approach focused on correcting minor (mis)behaviors to prevent more egregious ones (Whitman, 2008). …

A Novel Perfused Contusion Spinal Cord Injury Model To Assess Rapid Mechanical Properties Changes After Blood Spinal Cord Barrier Breakdown, Laura De Marchi

Theses and Dissertations

Blood-spinal cord barrier (BSCB) disruption exacerbates the tissue damage caused by spinal cord injury (SCI), but the mechanisms and dynamics of how the barrier breakdown affects the mechanical properties of the tissue remain unclear. The perfused bovine ex vivo indentation injury model described here represents a new platform to investigate the short-term effects of altered blood flow and vascular permeability following traumatic spinal cord injury. Our results indicate that injured cords exhibit changes to bulk perfusion, as evidenced by laser speckle contrast imaging, in addition to decreased barrier function shortly after injury. Indentation tests that simultaneously simulate a crush injury …

The Impact Of Social Emotional Learning And Trauma Informed Care On Teacher Well-Being And Capacity In The Classroom., Kathleen Kelley Michalowski

Theses and Dissertations

Educators and students have encountered significant challenges, including illness and loss within their families due to events such as the COVID-19 pandemic. Traumatic events, like disasters, can greatly disrupt a community's functioning, resulting in widespread losses that surpass the community's ability to cope. Trauma-informed care (TIC) acknowledges that individuals are likely to have a history of trauma and aims to respond appropriately to minimize the likelihood of further trauma. By implementing trauma-sensitive routines and promoting social-emotional learning (SEL) for both students and educators, we can offer them more opportunities for success and emotional growth. It's important to recognize that educators' …

Incorporating Diverse Multimodal Texts Within A Seventh Grade Language Arts Classroom To Increase Comprehension Accessibility And Improve Engagement, Kaitlin Maher

Theses and Dissertations

This thesis examines if diverse, multimodal texts have an effect upon student engagement while increasing comprehension for students with varied learning styles. Applicable theories that gave direction to this research study were Multiliteracies Pedagogy, Culturally Responsive Teaching, Funds of Knowledge, and Constructivism. Throughout the unit’s duration, students were instructed with various types of multimodal texts that included song, video, graphic novels, and performance while also working with modern authentic, diverse traditional texts. Students were also given a choice of mode in how to respond and demonstrate understanding. The qualitative research study analyzed data sources such as student surveys; my teacher …

Tranisitioning From Film To Stage: Three Years Of Growth And Reflections, Ruihan Liu

Theses and Dissertations

This thesis delves into my journey as a Master of Fine Arts candidate specializing in Scenic Design within the Theatre program at the University of South Carolina.

Comprising seven chapters, this thesis provides a comprehensive exploration of my academic and professional trajectory. The introductory chapter offers insights into my transition from a background in Film Production to the realm of Theatre Arts, reflecting on the challenges and revelations encountered along the way.

Chapters 2 through 5 offer in-depth analyses of five stage productions wherein I served as a scenic designer during my graduate tenure. Each chapter delves into the creative …

What’S Mine Is Yours: Managing Student Loans Within Different Gender Couples, Samantha Leigh Moser

Theses and Dissertations

In the United States, borrowing student loans from the federal government or private market to attend college has become increasingly common. Roughly one in eight Americans has student loans (Looney, Wessel, & Yilla 2020). Reports on federal student loans indicate that roughly 1.6 billion dollars was outstanding in May of 2022 (Hanson 2022b). Additionally, about 43.4 million borrowers each owe an estimated $37,014 in federal education loans (Hanson 2022a). Privately, as of July 2023, $131 billion dollars was outstanding for education loans.

Sociologists have begun researching the consequences of student loan debt on borrowers and their families. Consequences of student …

Examining The Experience Of Race-Related Stress For Black K-12 Educators, Tiffany A. Thompson

Theses and Dissertations

This study presents an action research investigation into the lived experience of race-related stress among Black K-12 educators. The study was motivated by the recognition that Black educators working in White settings are suffering from racerelated stress. A qualitative phenomenological case study design was employed to investigate the race-related stress of five female Black K-12 educators working in White school settings across several states. I used open coding to collect data from interviews, community of practice transcripts, participant reflections, and observational field notes were analyzed. The findings of the study reveal that Black educators experience racerelated stress while working in …

Synergetic And Orthogonal Switching In Dual Photochromic Metal-Organic Frameworks, Gina Rene Wilson

Theses and Dissertations

Cooperative behavior and orthogonal responses of two classes of coordinatively integrated photochromic molecules towards distinct external stimuli were demonstrated on the first example of a photo-thermo-responsive hierarchical platform. Synergetic and orthogonal responses to temperature and excitation wavelength are achieved by confining the stimuli-responsive moieties within a metal-organic framework (MOF), leading to the preparation of a novel photo-thermo-responsive spiropyran-diarylethene based material. Synergistic behavior of two photoswitches enables the study of stimuli-responsive resonance energy transfer as well as control of the photoinduced charge transfer processes, milestones required to advance optoelectronics development. Spectroscopic studies in combination with theoretical modeling revealed a nonlinear effect …

Informatics-Based Discovery Of New Natural Products, Their Biosynthesis, And Their Biological Roles, Ethan Older

Theses and Dissertations

In this work, genome mining and biosynthetic knowledge are applied for the discovery of new natural products, their biosynthetic pathways, and their promising biological activities and roles through the development of two unique new informatics-based approaches.

In chapter one, an overview of microbial natural product biological functions and biosynthesis is provided. The use of bioinformatics leveraging microbial natural product biosynthetic knowledge is also introduced. This chapter highlights the importance and need for developing innovative approaches to accessing microbial natural products, a vastly untapped source of new molecules with promising biological activities.

In chapter two, a correlational network linking the gene-encoded …

Mild Hydrothermal Crystal Growth Strategies For Complex Inorganic Metal Fluorides, Navindra Keerthisinghe

Theses and Dissertations

Inorganic metal fluorides have been investigated for their interesting magnetic and optical properties, their electrochemical behavior, and their ionic conductivity. Fluoride materials can accommodate metals in very low oxidation states, which can be advantageous for designing new magnetic materials. Specifically, mixed metal fluorides incorporating transition metal cations often exhibit interesting magnetic behavior, such as frustrated magnetism. However, many challenges are encountered during the synthesis of such fluoride materials, including the inability to perform reactions under ambient conditions and the involvement of toxic gases for fluorination during solid-state reactions. Therefore, solution growth techniques such as mild hydrothermal synthesis are currently utilized …

Approximate Computing And In-Memory Computing: The Best Of The Two Worlds!, Mohammed Essa Fawzy Essa

Theses and Dissertations

Machine learning (ML) has become ubiquitous, integrating into numerous real-life applications. However, meeting the computational demands of ML systems is challenging, as existing computing platforms are constrained by memory bandwidth, and technology scaling no longer yields substantial improvements in system performance. This work introduces novel hardware architectures to accelerate ML workloads, addressing both compute and memory challenges. In the compute domain, we explore various approximate computing techniques to assess their efficacy in accelerating ML computations. Subsequently, we propose the Approximate Tensor Processing Unit (APTPU), a hardware accelerator that utilizes approximate processing elements to replace direct quantization of inputs and weights …