Digital Commons Network^™

Fair Fault-Tolerant Approach For Access Point Failures In Networked Control System Greenhouses, Mohammed Ali Yaslam Ba Humaish

Theses and Dissertations

Greenhouse Networked Control Systems (NCS) are popular applications in modern agriculture due to their ability to monitor and control various environmental factors that can affect crop growth and quality. However, designing and operating a greenhouse in the context of NCS could be challenging due to the need for highly available and cost-efficient systems. This thesis presents a design methodology for greenhouse NCS that addresses these challenges, offering a framework to optimize crop productivity, minimize costs, and improve system availability and reliability. It contributes several innovations to the field of greenhouse NCS design. For example, it recommends using the 2.4GHz frequency …

Performance Analysis And Evaluation Of Image Processing Techniques, Dcnn And Bsn Model For Detection And Classification Of Diabetic Retinopathy, Sudha S

Theses and Dissertations

Diabetes is a disorder that arises when blood sugar level increases. Insufficient secretion of insulin hormone is the ground for the evolution of diabetes, and it affects most of the critical organs in our body. Diabetes causes leakage of blood in the retinal blood vessels, inducing an eye disease, Diabetic Retinopathy (DR). The visual identification of micro features in fundus images makes the clinicians complex and challenging tasks. Therefore, timely diagnosis and proper treatment can prevent eye blindness. This research is proposed to identify and classify diabetic retinopathy using an Image Processing technique, Deep Convolutional Neural Network (DCNN), Biological Sensor …

Rethinking Female Genital Cutting Through Postcolonial Lens, Erika Carvalho

Theses and Dissertations

Due to global instabilities, the resulting international displacement and rising inter- cultural tensions within Western societies have relocated gendered cultural practices at the center of contemporary debates on multiculturalism, social cohesion and migration. In this context, female genital cutting (FGC) has re-emerged as a symbol of savagery, portrayed as a symbol of “otherness”, a true global violation of women’s rights. While the increasing attention given to these practices is a testament to reinvigorated feminist activism, FGC has also been harnessed for the purposes of reproducing colonial discourses about the “Third World”, which have been integral to the revival of many …

Corporate Green Bond Market In Egypt: Barriers To Market Development, Aya Aly

Theses and Dissertations

Abstract

Green bonds have risen as a crucial financial tool for mobilizing capital for environmentally sustainable projects, aiming to address climate change and promote sustainable development. In Egypt, despite being a pioneer in issuing sovereign green bonds, the corporate bond market remains in its early stages, with relatively low issuance of corporate green bonds compared to other emerging economies. This study focuses on identifying the challenges facing the domestic corporate green bond market. Through interviews with eleven market participants, the analysis revealed general challenges that encompass the entire bond market, including lack of awareness, limited engagement of retail investors, lengthy …

Challenges Of Local Public Administration In Conflict -Affected Countries: Case Of Hadhramaut Governorate In Yemen, Istanbool Ba Abbad

Theses and Dissertations

This thesis explores the challenges local public administration faced in Hadhramaut, Yemen, and explores avenues for reform. The study's main question is: "What are the main challenges confronting local public administration in Hadhramaut, and what pathways can be pursued for reform?" Hadhramaut, known for its relative stability within Yemen's political unrest, was selected as the case study. Despite its stability, the governorate struggles with challenges arising from the conflict. The research aimed to uncover these challenges and suggest guidelines for recovery, envisioning the governorate as a model for the country. The research aimed to investigate the challenges confronted by public …

Lebanon Needs Food, Water, Medicine And Social Media, Elisabeth Croese

Theses and Dissertations

Lebanon has a history of instability, weak governance, and a strong civil society. The country has been in a state of crisis for decades and currently, the state is experiencing multiple crises at once. Political tensions, an economic crisis, and plummeting of the Lebanese Lira, together with the COVID-19 crisis have amounted to the instability of the state. All these tensions escalated even further when Beirut experienced a huge explosion in the port on 4 August 2020, killing over two hundred people and injuring thousands.

Civil society organizations play a crucial role in the development and survival of Lebanon. In …

Exploring A Gene Panel For Parkinson’S Disease In An Egyptian Cohort, Asmaa Saeed Gabr

Theses and Dissertations

Parkinson’s disease is a highly heterogeneous disorder characterized by diverse neuropathological features, clinical presentations and progression patterns. In Egypt, Parkinson’s disease incidence rates lie outside the range reported elsewhere. The genetic background to the pathogenesis of Parkinson's disease has been postulated for a long time. However, Parkinson’s disease has never been systematically investigated in Egypt. This study aimed to explore genetic variants and interactions that are associated with the familial and sporadic forms of Parkinson's disease in an Egyptian cohort. This includes examining variants in PD-related genes, exploring the role of specific genes like MAPT and adjacent genomic regions, and …

The Relationship Between Cognitive Impairment In Psychiatric Patients And Readmission Rate To An Inpatient Facility, Cherilyn Isis Schuff

Theses and Dissertations

The primary intention of this study was to further understand the impact of assessing cognitive impairment in psychiatric patients, as a mediating factor on readmission rates. Mild cognitive dysfunction impacts a patient’s functional outcomes (Bowie & Harvey, 2006; Davis et al., 2012; Marcantonio, et al., 2001). Little information exists to guide best practices in the treatment of adults with cognitive impairment who are hospitalized for acute conditions (Davis et al., 2012). A cognitive impairment may impact patient prognosis and ability to function outside of a setting focused on stabilization. Neuropsychological testing is a valuable tool in predicting a patient’s cognitive …

Usability-Driven Security Enhancements In Person-To-Person Communication, Tarun Kumar Yadav

Theses and Dissertations

In the contemporary digital landscape, ensuring secure communication amid widespread data exchange is imperative. This dissertation focuses on enhancing the security and privacy of end-to-end encryption (E2EE) applications while maintaining or improving usability. The dissertation first investigates and proposes improvements in two areas of existing E2EE applications: countering man-in-the-middle and impersonation attacks through automated key verification and studying user perceptions of cryptographic deniability. Insights from privacy-conscious users reveal concerns about the lack of E2EE support, app siloing, and data accessibility by client apps. To address these issues, we propose an innovative user-controlled encryption system, enabling encryption before data reaches the …

Resisting Internalized Stigma (Ris): Acceptability And Feasibility Of A Cognitive Behavioral Stigma Intervention For Early Psychosis, Francesca Maria Crump

Theses and Dissertations

The clinical high-risk state for psychosis (CHR-P) was created to help identify individuals experiencing early signs of psychosis to help forestall worsening symptoms. CHR-P individuals may experience stigma that may stem from internal or external processes, including from receiving specialized care. Research has demonstrated associations between internalized stigma and psychosocial and functional outcomes, which underscores the need for interventions to help mitigate the impact of stigma while balancing the need for treatment. To date, there is only one stigma intervention specifically designed for individuals designated as CHR-P, which is psychoeducational in nature. Based on the recent call to action that …

Third Mission Accelerator Labs (Tmals): An Exploratory Study On The Strategic Evolution Of Sustainability In University-Business Incubators (Ubis), Abdalla Hassanein

Theses and Dissertations

Globally, higher education institutions (HEIs) are devoting rising resources in order to remain competitive, impactful and attractive within the ever-changing socio-economic developments and to well position and communicate their value among their stakeholders (Lafuente-Ruiz-de-Sabando, et al. 2018). Students today want to do more than just get a degree; they want to create businesses, develop new markets, and start social movements (Kay et al., 2010). Under the open innovation model, universities' third mission (TM) includes deeper linkages and engagements with the private and public sectors, emphasizing the development of entrepreneurial mindsets, skills, and incubation services to encourage new business ventures, in …

The Effect Of Mechanical Strain On The Electronic Conductivity Of Α- Fe2o3: A Density Functional Theory Study, Sheriff Naziru Abdulmutalib

Theses and Dissertations

Hydrogen has emerged as a promising future energy carrier due to its ability to produce zero carbon dioxide (CO2) emissions when burned. However, the limited natural abundance of hydrogen necessitates the development of cost-effective and environmentally friendly methods for large-scale hydrogen production. Among the different hydrogen production approaches, photoelectrochemical water splitting, which employs a photoanode material in a cell using solar energy to split water into hydrogen and oxygen, is the focus of this work. α-Fe2O3 (hematite) is a photoanode material that shows a promising future for hydrogen generation in a photoelectrochemical cells due to its cheapness, availability, and its …

Improving The Energy Efficiency Of Residential Buildings In Egypt Through Whole Building Simulations, Habiba Aly

Theses and Dissertations

Residential buildings consume around 40% of total electricity consumption in Egypt. This research investigates the energy saving potential of the Green Pyramid Rating system (GPRS) and Tarsheed rating system on the building envelopes of mid-rise middle income residential buildings in Cairo through energy modelling and simulation. The study evaluates the economic feasibility of the recommendations of the two rating systems through Life Cycle Cost (LCC), Simple Payback Period (SPP), Discounted Payback Period (DPP), Net Present Value (NPV), and Internal Rate of Return (IRR) Calculations. This research also aims to develop energy efficiency recommendations to achieve 30% energy savings above the …

Analyzing The Effects Of Data Variability & Volume On Predicting Particulate Matter (Pm2.5): Insights From A Machine Learning Approach, Jada A. Macharie

Theses and Dissertations

Accurately predicting PM_2.5 concentrations are imperative to the future of public health and environmental policies. Machine learning models incorporating spatial and temporal datasets to predict PM_2.5 are often limited by data availability constraints and poor resolution satellite imagery.

Development Of Monitoring Systems Using Computer Vision Techniques For Precise Fish Farming, Abinaya N.S

Theses and Dissertations

Fish farm is a biosystem with diversity and uncertainties demanding, an intelligent manual monitoring process, which is labor-intensive, invasive, costly, discontinuous, and persistent. The proposed work aims to develop Computer Vision (CV) -based monitoring techniques for precise fish farming to address these problems. Three major monitoring operations namely (i) Fish behavior analysis, (ii) Fish Classification (FC) and (iii) Biomass estimation have been investigated.

Fish schooling activity has been monitored using an overhead vision camera. Problems associated with fish occlusion are addressed using the weighted K-means clustering technique which provides an accurate estimation of fish school locations. Temporal variations of these …

Prevention Of Food Fraud In Egypt: Policy Implementation Challenges And The Way Forward, Hager Yehia Shalaby

Theses and Dissertations

Prevention and control of food fraud is now an emerging policy goal for different governments. Food fraud is intentionally adulterating food intended for personal gain and deceiving consumers. Adulterated food continues to be a significant threat to Egypt's food sector because of its negative impact on the food industry's reputation. Additionally, it jeopardizes the success of initiatives to increase investment, tourism, and exports in Egypt. Addressing fraud is, by definition, the most challenging food control system form because it directly addresses a personal stake benefiting from fraud behavior. In light of the importance of food fraud prevention as an emerging …

Reliable Outdoor Ai-Based Autonomous Uav Localization And Trajectory Tracking Using Cellular Networks, Ghada Afifi

Theses and Dissertations

Unmanned aerial vehicles (UAVs) are becoming an integral part of numerous commercial and military applications. In many of these applications, the UAV is required to self-navigate in highly dynamic urban environments. Existing localization and trajectory planning techniques, which rely mainly on the Global Positioning System (GPS), do not provide an effective real-time solution for self-localization and path planning, particularly in dense urban environments. The purpose of this thesis is to study the localization and trajectory planning of UAVs independent of GPS systems or other detectable mobile signals. We propose to utilize the broadcast signals from existing cellular networks to localize …

The Effect Of Esg On Indices’ And Firms’ Performance. A Global And An Egyptian Context., Demiana Abdelmalak

Theses and Dissertations

Over the years, ESG (environmental, social, and governance) investing has been increasingly adopted by the financial markets. In this paper, we aim to study the effect of ESG on Indices’ and Firms’ performance using Morgan Stanley Capital International (MSCI) Indices as a global reference and Egypt’s indices as a national reference. We also study the effect of ESG scores on the Egyptian Firms’ performance over the past 16 years using econometrical models and Fama- French Five Factors Model. Our research shows mixed results which are aligned with the existing literature review. However, one can conclude that there is a positive …

Investigating The Association Between Gut Bacteria And Childhood Neuropsychiatric Disorders, Maha Abdo

Theses and Dissertations

Background: The etiology of autism spectrum disorder (ASD) remains unclear. However, it’s believed to be a multifactorial condition. Several studies suggest the involvement of gut and oral microbiome in the predisposition of ASD symptoms. Understanding the pathophysiology could aid in developing better treatment strategies that improve the quality of life of ASD individuals and their caregivers.

Aim: The current study aims at characterizing the gut and oral microbiome composition of ASD children compared to their healthy siblings and mothers as control groups.

Methods: Stool and saliva samples were collected from fourteen families at Ain Shams University Hospital, Outpatient Clinic. The …

The Brain Drain Of The Egyptian Physicians: A Look From Both Sides, Hebatalla Ahmed Mohamed Ismail

Theses and Dissertations

The brain drain of well-educated and trained workers is a problem that faces many nations. The pandemic revealed the importance of being ready with all resources, especially the healthcare workers. In Egypt, according to records of the Egyptian medical syndicate, half of the registered physicians in the syndicate are working abroad. In this study, we aimed to understand the relationship between individual satisfaction regarding work or family, his capability factors, and his intention to leave the country to work in another one. A quantitative approach was used by a self-administered online questionnaire. The results showed that 66.4% of physicians who …

Antibacterial And Anticancer Activities Of A Fosmid Clone From Atlantis Ii Red Sea Brine Pool., Marina Nabil

Theses and Dissertations

Antimicrobial resistance (AMR) and cancer are among the top global human health issues requiring urgent control practices. AMR caused 5 million death cases around the world in 2019. This number is expected to reach 10 million deaths by 2050. Cancer deaths reached 10 million in 2020. Additionally, anticancer drug resistance is a common cause of death among cancer patients. Screening for novel compounds is one of the strategies recommended by the World Health Organization (WHO) to control drug resistance in microbial and cancer cells. Marine natural products (MNPs) are characterized by chemically diverse structures with various bioactivities, especially in extreme …

Segmental Error Gravity In L2 Arabic Speech Comprehensibility And Accentedness: L1 Consonant Age Of Acquisition As A Predictor, Mark Papai

Theses and Dissertations

Second language (L2) pronunciation studies have found that the intelligibility (i.e., listeners’ actual understanding) of L2 speech is most closely related to its comprehensibility (i.e., listeners' ease of understanding) rather than to its overall nativelike pronunciation. The segmental errors that are most detrimental to communication are predicted by phoneme Functional Load (FL): mispronouncing high FL segments affects speech comprehensibility more negatively than mispronouncing low FL ones. However, no data are available on the FL hierarchy of Arabic segments. On the other hand, FL correlates highly with consonant age of acquisition (CAoA) in languages that rely heavily on consonants to contrast …

Blooming Through The Cracks: The Case Of Syrian Women In Egypt After 2011, Ola Dayeh

Theses and Dissertations

This study was conducted in 2023 and aims to understand the impact of displacement on Syrian women’s involvement in the public sphere in Egypt. After the transition of the Syrian revolution into an armed conflict, Syrians witnessed a large wave of displacement, looking for safety away from their homeland. The research defines displacement as the movement of people who are forced to leave their place of residence. The focus is directed on the situation of Syrian women who were displaced to Egypt after 2011, and it proves the claims that there is an increase in women’s engagement in the public …

Development Of An Electromagnetic System For Wireless Magnetic Manipulation Of Soft Capsule Endoscope For Drug Delivery Applications, Nada Ashraf Hussein Mahmoud

Theses and Dissertations

Wireless capsule endoscopy (WCE) is a remarkable diagnostic device that examines the gastrointestinal (GI) tract. The WCE is a small capsule integrated with a camera that is used to visualize the inner mucosa of the GI tract. WCE has been proven to be the most effective method to diagnose GI diseases and GI cancers. The procedure reduces the discomfort and risk compared to conventional endoscopy methods. However, current WCEs lack the ability to take a biopsy or deliver a drug to a specific location. Those therapeutic functions can be introduced by wirelessly controlled WCEs. This thesis introduces an electromagnetic system …

Native Speakerism In Egypt: The Perceptions Of Non-Native English-Speaking Teachers (Nnests) And Their Employability, Dina Bebars

Theses and Dissertations

Discriminatory hiring practices toward non-native English-speaking teachers (NNESTs) have been researched, debated, and criticized globally. Yet, such recruitment practices are still prevalent in the TESOL field due to perceptions of the linguistic prowess of the native English-speaking teacher (NEST). Given the existence of such practices, this study aims to identify the criteria that employers look for when hiring English language teachers in Cairo, to examine how nativeness is ranked within these criteria, and to investigate if there is a connection between the perceptions of administrators, parents, and teachers regarding NNESTs and hiring practices. A mixed-methods research design was employed to …

An Examination Of The Determinants Of Ease Of Doing Business: Perspectives From World Economies, Omar Eldarawy

Theses and Dissertations

This thesis’ purpose is to explore the correlation between Ease of Doing Business sub-scores and the overall Ease of Doing Business score. The study includes a detailed quantitative study into the previously mentioned relationship. The Ease of Doing Business sub-scores comprise of scores representing starting a business, dealing with construction permits, getting electricity, registering property, getting credit, protecting minority investors, paying taxes, trading across borders, enforcing contracts, and resolving insolvency. This is conducted via a series of diagnostic tests to identify an appropriate regression model. These tests include the Hausman Test, RESET Test, and Breusch-Pagan Test. Based on the tests, …

Thin-Film Nanocomposite Membranes With Alumina Nanoparticles For Textile Wastewater Treatment Applications, Amr Mohamed Tayel

Theses and Dissertations

Thin-film nanocomposite (TFN) membranes are gaining great interest in industrial wastewater treatment due to their superior performance, especially for higher water flux and pollutants’ rejection, as well as improved chemical, thermal and mechanical stabilities, compared to other types of membranes. The performance of TFN membranes can be enhanced using different types of nanofillers, among which ceramic nanomaterials, such as Al2O3, offer a promising potential for applications involving treatment of industrial wastewater such as textile effluents, and this is due to their stability, hydrophilicity, and relative low cost. The study of the TFN membrane properties and structure allows the optimization and …

Optimization Of Vibro-Seismic Parameters For Enhanced Oil Recovery Application, Tarek Abdel Aal

Theses and Dissertations

This thesis was conducted in the American University in Cairo by Tarek Ahmed Abdel Fattah Abdel Aal. The thesis is titled ‘Optimization of Vibroseismic Parameters for Enhanced Oil Recovery Application.’ The thesis discusses whether or not the combination of optimized physical vibration parameters with waterflooding would improve porosity, absolute permeability, relative permeability, and recovery when compared with just classical waterflooding. The optimized physical vibration parameters as well as methodology was used from a previous paper that was performed in conjunction with my thesis advisor on similar core samples. The experimentation was performed on five core samples with different porosities and …

An Examination Of The Determinants Of Ease Of Doing Business: Perspectives From World Economies, Omar Eldarawy

Theses and Dissertations

This thesis’ purpose is to explore the correlation between Ease of Doing Business sub-scores and the overall Ease of Doing Business score. The study includes a detailed quantitative study into the previously mentioned relationship. The Ease of Doing Business sub-scores comprise of scores representing starting a business, dealing with construction permits, getting electricity, registering property, getting credit, protecting minority investors, paying taxes, trading across borders, enforcing contracts, and resolving insolvency. This is conducted via a series of diagnostic tests to identify an appropriate regression model. These tests include the Hausman Test, RESET Test, and Breusch-Pagan Test. Based on the tests, …

Exploring Syrian Practices As New Possibilities: A Comparative Study Of Urban Catalysts At Al-Hossary And El-Rehab Through Deleuze’S Analysis Of Ruptures, Samar Green

Theses and Dissertations

Times of crisis can be theorized from a Deleuzian perspective as a ‘rupture’ to the normative modes of living, where, in the case of politically driven migration, both the displaced population and the host society are impacted by imperative change. Recognizing the transformative nature of these ruptures is crucial as they offer the potential to transition from one paradigm to another.

This research aims to investigate how the displaced Syrian population inhabit the new settlements of Al Hossary Area in 6 October and El Rehab City gated community Souk in New Cairo differently due to the limitations and opportunities their …