Digital Commons Network^™

Crafting Power, Piety, And Memory: The Sabil-Maktab Of 'Abd Al-Rahman Katkhuda In Bayn Al-Qasrayn, Cairo (1157 Ah/ 1744 Ce), Nehal Hany Al-Shamy

Theses and Dissertations

Among hundreds of sabil-maktabs in Cairo, the one ʿAbd al-Rahman Katkhuda built in Bayn al-Qasrayn in 1157/1744 stands out as an iconic jewel, rising to be a symbol of the city itself. However, this sabil is more than just a beautiful building, for its beauty was only a means to channel political, commemorative, and spiritual connotations. This thesis is concerned with analyzing the raisons d’être of constructing the sabil through investigating the historical and political circumstances that influenced its patron at the time, and their reflections in the artistic choices he made. I argue that crafting the sabil as a …

Gender, Integration, And Labor Market Access: The Case Of Syrian Refugees In Germany, Feras Al-Mekhlafy

Theses and Dissertations

Germany hosts one of the largest populations of Syrian refugees in Europe, making their successful labor market integration critical for social and economic stability. This study investigates the gender gap among Syrian refugees in Germany within the broader refugee–native labor market gap. Using cross-sectional data from the 2022 SOEP refugee survey, it applies a Heckman two-step selection model to jointly analyze employment and wage outcomes while correcting for selection bias. Results reveal that structural barriers (e.g.: legal and bureaucratic) and compositional factors (e.g.: human capital) rather than wage discrimination drive most observed disparities. Female refugees face significantly lower employment probabilities, …

Facebook Interaction As A Potential Marker Of Cognitive Decline: Pilot Study, Esraa M. Qansuwa

Theses and Dissertations

One of the critical challenges in brain disorder research is the early identification of individuals with mild cognitive impairment (MCI) who may later develop Alzheimer’s disease (AD) or other dementias. MCI in older adults is frequently associated with diminished social engagement and observable behavioral changes. With the rapid expansion of social media platforms and advances in Machine Learning (ML), digital traces from online activity present a novel and scalable avenue for mental health screening. In particular, predictive ML approaches have demonstrated strong potential in building reliable classifiers for early detection of neurocognitive decline. This study introduces an innovative framework that …

The Indeterminacy Of Customary International Law, Mohamed Diaa Tawfik

Theses and Dissertations

This thesis explores the judicial formation of customary international law and examines how international courts oscillate between interpretive and law-making functions. It analyzes key theoretical frameworks—including Kelsen’s Pure Theory of Law, Dworkin’s Law as Integrity, Kennedy’s radical indeterminacy, and Koskenniemi’s Descending-Ascending Approach—to understand how courts assert and shape customary norms beyond mere state practice and opinio juris. The work concludes that the International Court of Justice and other tribunals increasingly act as de facto lawmakers under the guise of interpretation, advocating the indeterminacy they try to avoid.

Effect Of Fintech Adoption On Commercial Banks’ Stability: Evidence From Gcc And North Africa, Ibrahim Ahmed

Theses and Dissertations

This paper looks at how financial technology (FinTech) adoption affects bank stability, measured by distance to default. It uses a unbalanced panel of listed banks from the Gulf Cooperation Council (GCC) and North Africa over the period from 2010 to 2024. To consider differences in bank risk and institutional traits, the study uses random-effects panel regressions along with quantile regression models and interaction specifications. These methods allow the effects of FinTech to change depending on the level of bank risk and the size of the bank. The results indicate that FinTech development does not have the same effect on banks’ …

Flexible Fault-Tolerant Multi-Die Fpga-Based Architectures For Varying Space Environments, Yosof Ali Seif El Din Ali Maklad

Theses and Dissertations

It is well-known fact that spacecraft’s electronic components operate in an extreme harsh and varying space environments, beside changing orbit or passing through Van Allan Belts during orbital course results of radiation levels change. This thesis focuses on SRAM-based FPGA systems on-board of such spacecrafts, that are commonly utilized in space applications’ critical applications due to their capabilities and flexibility to reconfigure, since these systems are vulnerable to frequent negative impacts of ionizing radiation, thus inducing soft and hard errors leading to disastrous failures that could jeopardize the entire spacecraft. The soft errors’ effects are frequent yet can be mitigated, …

Dynamic Multi-Layered Hardware Obfuscation With Behavioral Drift Locking For Sat-Resistant Designs, Ahmed Yehia Salah Mohamed Emish

Theses and Dissertations

The globalization of the semiconductor supply chain has introduced critical vulnerabilities, including intellectual property (IP) piracy, reverse engineering, and hardware tampering. While traditional logic locking offers a baseline of defense, the emergence of powerful Boolean satisfiability (SAT) solvers has rendered many static obfuscation techniques ineffective. This work proposes a Dynamic Multi- Layered Hardware Obfuscation Framework that utilizes Behavioral Drift Locking (BDL) to provide a robust defense-in-depth against advanced adversarial models. The methodology integrates four synergistic layers: • Dynamic Key Management using a time-dependent rotation mechanism that updates keys every clock cycle to prevent static analysis. • Control Obfuscation through opcode …

Ceo Duality And Environmental Efficiency : Empirical Case Study On Chinese Publicly Listed Companies Between 2015-2024, Mariam Ahmed El Taher

Theses and Dissertations

Abstract

The paper investigates the potential effects of CEO duality—where the CEO also chairs the board—on environmental efficiency in Chinese listed companies between 2015 and 2024. Energy intensity, or total energy use per unit of revenue, serves as a stand-in for environmental efficiency. In the full sample, CEO duality is consistently linked to higher energy intensity (≈19–27 units; p< 0.01) using firm, year, and (in the pooled models) sector fixed effects with firm-clustered standard errors, suggesting lower environmental efficiency under unified leadership. In line with creditor discipline, market capitalization is typically negative and substantial, headcount is positive, and leverage (Net Debt/EBITDA) is negative. Moderation tests reveal that leverage significantly reduces the duality–inefficiency link (Duality×Leverage ≈ −0.49; p< 0.05), while interactions with board conflicts, working capital, gender diversity, and disclosure/independence are statistically insignificant.

The study uses an instrumental-variable estimation to account for potential endogeneity, where CEO duality may itself be influenced by unobserved firm characteristics or past performance. Diagnostic tests (Anderson LM, Cragg–Donald F, and Sargan) confirm that the instrument, which is based on …

Ethical Constraint-Based Mpc With Adaptive Weight Scheduling For Autonomous Vehicles In Diverse Scenarios, Hend Mohammed Aafia`

Theses and Dissertations

Autonomous vehicles (AVs) are increasingly deployed in complex and safety-critical environments, raising fundamental questions about how ethical principles should be operationalized within real-time control systems. While existing research has extensively addressed ethical decision-making at the planning and behavioral layers, ethical intent is commonly translated into predefined trajectories and delegated to low-level controllers under the assumption of safe execution. This separation introduces a critical gap between ethical reasoning and physical feasibility, particularly in scenarios involving nonlinear vehicle dynamics, actuation limits, constrained perception horizons, and time-critical interactions with vulnerable road users. This thesis proposes an Ethical Model Predictive Control (E-MPC) framework that …

Examining The Science Of Reading Focusing On Phonemic Awareness And Multicultural Literature To Enhance Reading Achievement Among African American Students, Danielle L. Gantt

Theses and Dissertations

This mixed-methods action research study examined how implementing the CKLA, Core Knowledge Language Arts, curriculum, founded in the science of reading, enhanced the reading achievement among first-grade African American students. The purpose of the study was to explore how phonics instruction, specifically phonemic awareness, and multicultural literature would improve literacy. The study was guided by Ivankova’s six-phased mixed methods model integrating quantitative and qualitative data. The quantitative data collected included the DIBELS, Dynamic Indicators of Basic Early Literacy Skills, benchmark and progress monitoring assessments. The qualitative data included student work samples, multicultural literature lessons, and open-ended student responses. The quantitative …

Legal Reform And Cultural Resistance: Examining The Role Of Law And Custom In Ending Fgm In Egypt, Souhaila Hafez Abo Seada

Theses and Dissertations

This thesis examines the persistent gap between legal reform and social practice in efforts to end Female Genital Mutilation (FGM) in Egypt. Although FGM has been criminalized since 2008, with stronger penalties introduced in 2016 and 2021, the practice continues, revealing the limits of law when it operates alongside powerful social, religious, familial, and medical norms. Using a qualitative case-based approach grounded in legal pluralism and Feminist Critical Discourse Analysis, the study draws on 11 semi-structured interviews with participants from civil society, religious institutions, the legal profession, the medical sector, and communities where FGM persists, alongside legislative, demographic, and documentary …

“Language Learners As Ethnographers: A Case Study On A Pedagogical Approach To Developing Intercultural Communicative Competence”, Nihal El-Gameel

Theses and Dissertations

Despite the extensive theoretical models and frameworks for Intercultural Communicative Competence (ICC), pedagogical approaches to teaching culture remain underexplored. This study examined the effectiveness of integrating a pedagogical framework—the OSEE framework developed by Deardorff (2000)—within a language classroom context. Using a mixed-methods approach, data were collected through audio-recorded reflections, a questionnaire, an interview, and a final project video presentation in a single-case study design. Data analysis followed Miles and Huberman’s (2014) model of qualitative analysis, employing a funneling approach tailored to each research question: the first applied Chen and Starosta’s ICC model (1996;1999) the second used deductive thematic analysis to …

Interest Rate And Inflation Control In Egypt: Evaluating Policy Efficiency (1976-2023), Fatma Abouzeid

Theses and Dissertations

Inflation has been a persistent problem in Egypt peaking with unprecedented levels throughout the past decades affecting economic stability and living standards in the country. Controlling inflation through interest rate has been a major tool adopted by the monetary authorities in Egypt with no real satisfactory outcome with respect to inflation levels. This links to a theoretical debate in economic literate on the relationship between interest rate and inflation which represents a major controversy in the field. The study examines this controversy in the case of Egypt to reach a conclusion on the actual relationship between these two central economic …

Digital Replica For Trustworthy Cooperative Autonomous Vehicles, Hady Farahat

Theses and Dissertations

Trust in an automated system can be defined as confidence in a vehicle's reliability, safety, and predictability, which is essential for the acceptance and widespread adoption of fully autonomous vehicles (FAVs); without it, users might disengage from using autonomous vehicles or reject the technology altogether. Most of the previous research has focused on trust from an ego vehicle perspective.

However, next-generation vehicles are becoming more autonomous and connected, relying on vehicle-to-vehicle technology and vehicle-to-infrastructure technology with no human intervention. Hence, trust becomes more complex and fragile as multiple agents interact with each other, and it might become harder to establish …

Cognivault: Enabling Privacy-Aware Cognitive Distortion Detection In Intelligent Mental Health Applications, Mariam Dawoud

Theses and Dissertations

Mental health applications are increasingly leveraging intelligent systems to sup- port psychological well-being, yet preserving user privacy remains a major concern. This thesis presents CogniVault, a secure ecosystem for cognitive distortion data. The framework includes Cognify, a mobile journaling application that detects cog- nitive distortions in user-written journal entries using a locally deployed machine learning model. Cognitive distortions are maladaptive thought patterns such as catastrophizing or personalization, which the app identifies to provide therapeu- tic insights. To ensure privacy-preserving data analytics, CogniVault includes the design and implementation of a hybrid security architecture, PRISM-HDI, that combines Paillier Homomorphic Encryption (HE), Differential …

Formulaic Sequences: Teacher And Student Perceptions And Teaching Strategies, Ali Sayed Muhammad Abd Allah

Theses and Dissertations

Formulaic Sequences (FS), common word combinations stored and used as single units, are crucial for achieving oral fluency yet remain underrepresented in pedagogical materials. This study explores this gap by examining teacher and student perceptions of FS and the teaching techniques within an online Egyptian EFL context. Utilizing a mixed-methods approach, data were gathered via teacher interviews (n=4), student questionnaires (n=100), a student focus group (n=4), and classroom observations. Results indicated that teachers unanimously perceived FS as essential building blocks for fluency, accuracy, and learner confidence, and they utilized a spectrum of techniques ranging from explicit instruction to incidental exposure …

Harnessing Ml And Iiot For Traceability In Continuous Production Systems: A Conceptual Framework, Kholoud M. Abdelaal

Theses and Dissertations

In the era of rapid technological advancement, the manufacturing sector faces increasing pressure to leverage emerging technologies to enhance operational efficiency and minimize waste. In this context, traceability plays a pivotal role, as it provides complete visibility of processes and products throughout manufacturing systems, enabling them to identify areas for improvement and take corrective actions accordingly. Additionally, traceability ensures compliance, supports product recalls, provides a clear understanding of the system’s performance, and enables fact-driven decision-making in multiple aspects of the manufacturing system. Although the broad spectrum of traceability applications in batch production-based plants, traceability remains challenging to achieve in continuous …

Electronic Transport In Twisted Bilayer Tungsten Diselenides, Walid Zaher

Theses and Dissertations

This thesis investigates density waves (DWs) in twisted bilayer tungsten diselenide (tWSe₂) using a mean field approximation, with a focus on electron-electron interactions, and the system’s free energy at zero temperature. For the mean field approximation, the study initially employed same-spin nesting vectors, which were found insufficient to induce DWs formation. In contrast, when opposite-spin nesting vectors were used, DWs emerged, indicating that these vectors can support DWs formation. The plots were produced under perfect nesting conditions, where van Hove singularities (VHS) occur. At zero temperature, perfect nesting provides a complete picture of the upper limit of DWs formation, as …

A Virtual-Reality-Based Dental Simulator For Endodontics With Automated Formative Feedback, Yousef Salah Abo El Ela

Theses and Dissertations

Advancements in virtual reality (VR) and haptic technology are transforming the landscape of medical and dental education, offering new avenues for safe, immersive, and repeatable training experiences. Within dentistry, endodontics presents unique challenges for preclinical education due to anatomical complexity, limited access to extracted teeth, ethical concerns, and the shortcomings of conventional plastic models. Despite endodontics specific plastic teeth being available, they fall short of replicating the hardness of real extracted teeth, are relatively costly compared to generic plastic teeth, and are ultimately a disposable item which makes them inadequate as a sustainable long-term solution. Extracted teeth do a much …

The Philosophy Of Selling Community: Developer Narratives And Resident Experiences Of Privacy And Community In Gated Communities In Cairo, Yosr Samir Raghib

Theses and Dissertations

Gated communities have become a global urban form with diverse impacts on their inhabitants. In recent years, Cairo has been expanding to the edges, and land that has always been a desert is now rapidly transforming into new cities that people are leaving their homes in the center of the city to move to seeking seclusion, security, privacy, and sense of community. Despite the tension proven between privacy and community, developers attempted to sell both concepts to coexist in gated communities in different manners to express their unique brand. Both concepts are defined differently by each developer, resulting in different …

Stakeholder Views Of Real Estate Registration In Egypt And The Reform Of 2022, Karim Alsisi

Theses and Dissertations

Real estate registration in Egypt has historically remained low despite the enactment of a deeds registration law in the 1940s and a title registration law in the 1960s. The 2022 reform (Law No. 9 of 2022) warranted an assessment of its effectiveness through a Public Policy and Administration lens. This thesis has two main objectives: first, to examine stakeholders’ views of the reform; and second, to explore stakeholder perspectives on formal registration and the factors driving registration avoidance by employing a qualitative design, using in-depth interviews with four stakeholder groups encompassing both system users and service providers. The findings revealed …

Women Representation In Higher Education Leadership In Egypt: A Qualitative Study, Eman Fouda

Theses and Dissertations

The purpose of this research is to investigate women representation in higher education leadership in Egypt. Currently, the representation of women in leadership roles in higher education is not proportionate to the percentage of women in Egypt, or even to the percentage of women employed in education. The importance of this topic arises from the implications of gender inequality. This research explores the perceptions of women in higher education regarding the social and cultural barriers that hinder their advancement to leadership positions. The discussion is in light of the social dominance theory and the cultural and social issues that stand …

An Impact Assessment Of The Effectiveness Of Utilizing Informal Health Communication Interventions To Spread Health Recommendations And Change Public Perception, Lina Mohamed Ezzat Ahmed Abdel Mawgoud

Theses and Dissertations

Brain health is an increasingly urgent but critically under-addressed public health priority in Egypt and the wider MENA region. Despite its centrality to aging, productivity, and overall quality of life, public understanding of brain health remains limited, and stigma continues to shape responses to dementia and cognitive decline. This study evaluates the effectiveness of informal, culturally adapted health communication as a tool to shift perception, increase awareness, and promote behavior change among non-medically trained adults in Egypt.

Grounded in global evidence on cognitive reserve, neuroplasticity, and the life-course approach to brain health, the intervention translated expert-informed brain health recommendations into …

A Computational Study Of The Chemomechanics Of Paracetamol Polymorphs: Towards Improving Drug Tabletability, Karim Nader Samra

Theses and Dissertations

The mechanical properties of pharmaceutical crystals are of great importance in tablet manufacturing. Also, knowing the mechanical properties of different polymorphs of the same crystal can reduce the overall production cost. In this study, computational work was done via performing density functional theory calculations on 3 paracetamol crystal polymorphs Form I, II, and III. Understanding the chemical bonding helps in predicting the key elastic properties for different crystallographic directions. In Form II, lattice vector C is dominated with the intermolecular hydrogen bond OH…O giving it the stiffest Young Modulus and the least Poisson’s ratio. Then comes the A-Axis which contains …

Design Of Novel Formwork System And Development Of Numerical Model For Comparison Between Formwork Systems, Ahmed Yehia Abdel Aziz El Sayed

Theses and Dissertations

The formwork industry has witnessed major breakthroughs in the last decades. However, they required huge amount of materials leading to negative environmental impacts. Also, the commercially available systems have big number of accessories and requires the extensive use of units to cover the areas to be poured. There was an attempt to target all these disadvantages by introducing the Funicular Arched Steel Truss (FAST) system. However, this system had its own drawbacks, and this is why the researcher introduced an extendable version named the “Extendable Funicular Arched Steel Truss (EAST) system.”

To reach the final version of the EAST design, …

Examining The Science Of Reading Focusing On Phonemic Awareness And Multicultural Literature To Enhance Reading Achievement Among African American Students, Danielle L. Gantt

Theses and Dissertations

This mixed-methods action research study examined how implementing the CKLA, Core Knowledge Language Arts, curriculum, founded in the science of reading, enhanced the reading achievement among first-grade African American students. The purpose of the study was to explore how phonics instruction, specifically phonemic awareness, and multicultural literature would improve literacy. The study was guided by Ivankova’s six-phased mixed methods model integrating quantitative and qualitative data. The quantitative data collected included the DIBELS, Dynamic Indicators of Basic Early Literacy Skills, benchmark and progress monitoring assessments. The qualitative data included student work samples, multicultural literature lessons, and open-ended student responses. The quantitative …

Intelligent Skies: Deep Learning Architectures For Scalable Aviation Safety Systems, Amine Khelifi

Theses and Dissertations

The growing complexity of aviation operations, particularly in rotorcraft and vertical flight necessitates the development of intelligent, automated systems to enhance safety and situational awareness. This thesis investigates the application of artificial intelligence (AI), with a focus on deep learning (DL), to address critical safety challenges in aviation. Four core use cases are examined: helicopter cockpit flight data monitoring, runway detection, helipad segmentation, and obstacle localization around rotorcraft landing zones. Each application targets a specific gap in current aviation infrastructure, with an emphasis on operational needs identified by the Federal Aviation Administration (FAA). Leveraging a range of DL architectures, including …

Development Of Salinomycin Analogs As Potential Anti-Cancer Agents, Pavan Goud Juluri

Theses and Dissertations

Salinomycin, a poly-ionophore antibiotic originally isolated from Streptomyces albus, exhibits antimicrobial activity against Gram-positive bacteria. Over the years Salinomycin has been studied in the effects it has on cancer, specifically cancer stem cells. Poly(ADP-ribose) polymerase (PARP) is an enzyme involved in DNA repair. Inhibiting PARP has been explored as a strategy in cancer treatment, particularly in cancers with defective DNA repair mechanisms, such as those with BRCA mutations. The benzo-thiazoles, and -imidazoles are identified as inhibitor scaffolds, which compete with nicotinamide in the binding pocket of human poly- and mono-ADP-ribosylating enzymes. Benzothiazole, and benzimidazole based compounds particularly with modification at …

Legal Paradoxes Of Transition: Transitional Justice And The Rule Of Law Between Nürnberg And Saddam Hussein Trials, Rasha Abdelsamea Ahmed Baghdadi

Theses and Dissertations

ABSTRACT

This thesis critically examines the legal paradoxes embedded within transitional justice (TJ) discourse, using the Nürnberg and Saddam Hussein trials as case studies to interrogate the complex relationship between justice and the rule of law in TJ discourse. It highlights the inherent tension between forward-looking societal reforms and the pursuit of backward-looking justice, challenging the foundational assumptions of TJ as a universal tool for justice and peace. It also questions the validity and credibility of "transition" as a phase between the past and the future. It contends that TJ, driven by Western liberal epistemic foundations, functions as an exclusionary …

Assessing Abuse And Neglect In U.S. Nursing Homes: A Comparative Analysis Across Pre-, During, And Post-Pandemic Periods, Katherine Gane

Theses and Dissertations

Nursing homes are among the most closely regulated providers in the U.S. healthcare system, with both federal and state agencies working together to monitor care and help protect residents. The COVID-19 pandemic, however, introduced unprecedented challenges for facilities and survey agencies alike, disrupting normal operations, limiting in-person visits, and temporarily shifting regulatory priorities. The purpose of this study was to examine how these pandemic-related disruptions were reflected in the severity and reporting patterns of substantiated abuse and neglect deficiencies in U.S. nursing homes. Using publicly available data from the Centers for Medicare & Medicaid Services (CMS), this study analyzed 39,607 …