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Articles 1 - 26 of 26
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On Sectored Sensor To Actuator Networked Control Systems Architectures With Fault Tolerance At The Sensor Level, Rana Hassan Elmaraashly
On Sectored Sensor To Actuator Networked Control Systems Architectures With Fault Tolerance At The Sensor Level, Rana Hassan Elmaraashly
Theses and Dissertations
Networked Control Systems are broadly implemented to meet the demands of many critical industrial applications. This study proposes an NCS system that employs Sectoring to a Sensor to Actuator (S2A) architecture. The proposed system guarantees no over delayed packets with zero packet loss using Gigabit Ethernet, and this is accomplished using Riverbed Modeler simulations. Hence, succeeding in meeting all the required real-time constraints. System performance is then compared quantitatively to the in-loop and the S2A NCS models. Moreover, Sift-out modular redundancy is implemented at the sensor level. It is evident that the system can sustain the extra network load with …
Women Entrepreneurs In Egypt: A Qualitative Study Of Perceptions And Challenges, Rwan Zakria Abdelrhman
Women Entrepreneurs In Egypt: A Qualitative Study Of Perceptions And Challenges, Rwan Zakria Abdelrhman
Theses and Dissertations
Although all entrepreneurs and business owners encounter obstacles and barriers, the challenges that female entrepreneurs face in Egypt are surmount. Female entrepreneurs in Egypt lack the requisite training and basic advising services that would keep them updated with new technological skills. Moreover, women are more likely to discontinue their businesses due to limited access to finance. Furthermore, women face restrictive legal and institutional burdens when establishing their business or when starting a new one. In addition, cultural constraints are another challenge that negatively influence women's credibility, their empowerment and self-confidence. The current study, intends to investigate the challenges that female …
The Geometry Of Social Networks, Daniel Mackisack
The Geometry Of Social Networks, Daniel Mackisack
Theses and Dissertations
This thesis is primarily about the impact of the Egyptian revolution on the social realities of those who experienced it. How it changed their lives and how it reshaped society. It looks at the relationship between the geometry of the social in Cairo and the experience of political events and regime changes in Egypt between 2010 and 2016, drawing from the individual assemblages and narratives of participants and their associations with diverse people and places. It covers a period beginning prior to the revolution on January 25th 2011 and concludes in the more recent post-revolutionary period. Individual participants were surveyed …
Constellations Of Mobility: The Politics Of Dream-Making, Yara Ahmed
Constellations Of Mobility: The Politics Of Dream-Making, Yara Ahmed
Theses and Dissertations
This thesis is concerned with how we navigate the labyrinthine nature of our lifeworlds; as we build futures, we dream of other time-spaces. We hope; we wait; we feel stuck. More particularly, this thesis is concerned with the processes of movement that occur when precarious queer bodies dream of a somewhere else, echoing what is brewing in the body, what spills over the boundaries and categories of the possible and the impossible. I take an ethnographic approach in an attempt to trace the multiple projects of dream-making that are becoming around my interlocutors. These projects translate to a crafting of …
Molecular And Functional Dissection Of Igaa, The Negative Regulator Of The E.Coli Rcs System., Nahla A. Hussein
Molecular And Functional Dissection Of Igaa, The Negative Regulator Of The E.Coli Rcs System., Nahla A. Hussein
Theses and Dissertations
The cell envelope of Gram-negative bacteria is a complex macromolecular structure, performing essential functions such as transport, respiration and protection. Moreover, it is the first line of contact between bacteria and their surroundings. Thus, maintenance of the cell envelope homeostasis is essential for bacterial survival and adaptation. In enterobacteria, the Rcs system (Regulator of capsule synthesis) monitors envelope integrity and induces a stress response when damages occur in the outer membrane or in the peptidoglycan layer. Built around a two-component system, Rcs controls gene expression via a cascade of phosphoryl transfer reactions. Being particularly complex, Rcs also involves the outer …
Bim-Based Model For The Automatic Generation And Optimization Of Planning And 4-D Scheduling For Concrete Skeleton: A Graph Theory Approach, Yasmeen Essawy
Bim-Based Model For The Automatic Generation And Optimization Of Planning And 4-D Scheduling For Concrete Skeleton: A Graph Theory Approach, Yasmeen Essawy
Theses and Dissertations
With the rapid increase in complexity in the building industry, project managers are facing more and more complex decision environments and problems. Therefore, it would be beneficial to aid project managers in making sound decisions regarding the intelligent knowledgeable selection of the optimal construction methodology for concrete skeletons while making use of Building Information Modelling (BIM). BIM models’ usage fused with modelling, and simulation tools allow efficiently prototyping a building and examining its construction activities before breaking the ground. For this purpose, an intelligent framework with advanced computational tools and algorithms is designed and created to achieve a higher degree …
Fabrication And Characterization Of Pb-Ge-Te Nanocrystals And Thin Films As A Potential Material For Ferroelectric Applications, Asmaa Mohammed El-Khodary
Fabrication And Characterization Of Pb-Ge-Te Nanocrystals And Thin Films As A Potential Material For Ferroelectric Applications, Asmaa Mohammed El-Khodary
Theses and Dissertations
Recent trends of technology require reliable memory devices in terms of large capacity, bandwidth, and high performance along with low power consumption and cost to be compatible with scaling computing systems size. Currently, charge based memories such as dynamic random access memory (DRAM) face some issues in density scaling due to the high power needed to refresh the memory cell in order to keep its contents, which leads to a high production cost [1]. Non-volatile ferroelectric random access memory (NVFRAM) is considered a promising solution since it tackles the problem of high power consumption for refreshing cycles, being non-volatile, in …
Growth Factor-Free And Antimicrobial Elastic Nanocomposites For Bone Regeneration, Dina Mohsen Ibrahim
Growth Factor-Free And Antimicrobial Elastic Nanocomposites For Bone Regeneration, Dina Mohsen Ibrahim
Theses and Dissertations
Elastic platforms have been shown recently to be advantageous for bone tissue engineering. Specifically, PEGylated polyglycerol sebecate has recently been reported in literature as a modification for Poly glycerol sebacate (PGS). It is highly elastic with tunable mechanical properties, rendering it an interesting candidate for bone regeneration. However, it lacks the bioactive and antimicrobial properties that are essential for bone tissue engineering scaffolds. To address these issues, herein, PEGylated PGS with different PEG ratios was mixed with PCL to obtain uniform electrospun mats. Further functions were added to the structure to render it osteoinductive and antimicrobial through the addition of …
The Ex Officio Power Of The Arbitrator To Raise New Issues Of Law In Islamic Finance Disputes, Mohamed Hassan
The Ex Officio Power Of The Arbitrator To Raise New Issues Of Law In Islamic Finance Disputes, Mohamed Hassan
Theses and Dissertations
The legal nature of arbitration varies from the legal nature of litigation. While the judge derives his authority from the state power, the arbitrator derives his powers, in the first place, from the parties' agreement. The power of the court to raise new issues of law ex officio is widely recognized. When it comes to arbitration, the matter is more complicated. The ex officio power of the arbitrator to raise new issues of law is controversial in international commercial arbitration. The situation is even more complicated in contemporary Islamic finance disputes due to the nature of the applicable law to …
Integrated Devices In Mir For On Chip Applications, Sara Ahmed Shafaay
Integrated Devices In Mir For On Chip Applications, Sara Ahmed Shafaay
Theses and Dissertations
Gas sensing play an important role in various fields such as environmental, medical, and for industrial applications. A precise controlling for the mount of a gas in certain place can be vital in quality for industrial process, for security, and for human health applications. Selectivity , sensitivity, and foot print are the main characteristics in designing any gas sensors. We chose to work in mid-infrared (MIR) because it contains special peaks for each type of gas which help improve the selectivity for any gas sensor. Mid-infrared (MIR) region is an important region for sensing applications because it contains vibrational resonance …
The Effect Of Ephedra Foeminea On Human Bone Osteosarcoma U2os Cell Viability And Migration, Eric Zadok Mpingirika
The Effect Of Ephedra Foeminea On Human Bone Osteosarcoma U2os Cell Viability And Migration, Eric Zadok Mpingirika
Theses and Dissertations
Although advancement has been made in the development of cancer treatments, contemporary treatments still present significant challenges such as low effectiveness and adverse side effects. There is thus a critical need to continuously develop new and more effective drugs against cancer. Herbal plants serve as a potential source for a wide variety of complex compounds with probable anticancer activity. E. foeminea is an herb whose use in the Middle East recently gained popularity as a remedy for cancer. There is however minimal empirical evidence regarding the anticancer effects of E. foeminea. In this study, the effect of E.foeminea ethyl acetate, …
Physical And Biological Insights Of Nanostructured Ti-8mn Alloy For Coronary Drug Eluting Stent Material, Alaa Mohyeldin Soliman
Physical And Biological Insights Of Nanostructured Ti-8mn Alloy For Coronary Drug Eluting Stent Material, Alaa Mohyeldin Soliman
Theses and Dissertations
According to the World Health Organization (WHO), cardiovascular diseases (CVDs) are the main cause of death worldwide. Coronary Artery Disease (CAD) is the common cause of heart failure. In CAD, lipids and fats that are circulating with the blood may get accumulated within the injured arteries' walls and restrict the blood flow to the myocardium, which in turn results in atherosclerosis. Since the approval of Drug Eluting Stents (DES) by the Food and Drug Administration (FDA) as a treatment option for CAD, multidisciplinary research is being conducted to introduce biomaterials with adequate physical properties as well as excellent clinical outcomes. …
Silicon Nanophotonics For Mid-Ir Applications, Hosam Eldin Ibrahim Mekawey
Silicon Nanophotonics For Mid-Ir Applications, Hosam Eldin Ibrahim Mekawey
Theses and Dissertations
The research targets the challenge of being able to bring the recently discovered nanophotonics phenomena in the visible spectrum to the Mid-Infrared spectrum in order to be exploited in many mid-IR related applications which include sensing and energy harvesting. In addition to this, the material of choice needs to be silicon in order to take advantage of the low cost, mass fabrication capabilities offered by silicon-based, Complementary Metal Oxide Semiconductor (CMOS) standard fabrication techniques employed in the modern electronics industry. Mainly there are five research points that are being tackled. The first research point has 3 objectives. First, is to …
Democratization And The Role Of The Military: Cases Of Serbia And Tunisia, Mona Abdelmoneim Elhusseiny
Democratization And The Role Of The Military: Cases Of Serbia And Tunisia, Mona Abdelmoneim Elhusseiny
Theses and Dissertations
The 21st century witnessed two waves of uprisings, the Color Revolutions, which erupted in East Europe and the Arab Spring, during which the people took over the streets to demand their rights and freedoms, as well as, to oust their authoritarian rulers. Nevertheless, the outcomes of such uprisings varied considerably among the affected countries; while few were successfully able to witness a regime breakdown and a democratizing transition, others failed either to achieve a regime breakdown, or to follow a democratic transition following their regime's breakdown. Thus, this research investigated why some countries have succeeded to follow a democratizing transition …
The Role Of Political Parties In Egypt (1978-2017) And The Resilience Of Authoritarianism, Yasmeen Shaheen
The Role Of Political Parties In Egypt (1978-2017) And The Resilience Of Authoritarianism, Yasmeen Shaheen
Theses and Dissertations
The current thesis focuses on the immense importance of the role of political parties in Egyptian politics and the Resilience of Authoritarianism, tracing their evolution and development from 1978 to 2017. It has proved that Egyptian political parties, in the period of the present work, have failed to consolidate democratic transformation by institutionalizing authoritarianism. This role has been so marginal that these pre- and post-Uprising political parties have been ridiculed as Ahzab Cartooniyah (Cardboard Parties). It has been found that about 100 parties out of 109 are remarkably so feeble and even paralyzed in their opposition to autocratic and dictatorial …
Pre-Analytical Variations Affecting Inr Measurement For Dose Tailoring Of Anticoagulants., Samir Nabhan Shamma
Pre-Analytical Variations Affecting Inr Measurement For Dose Tailoring Of Anticoagulants., Samir Nabhan Shamma
Theses and Dissertations
Although warfarin (WRN) has been used as oral anticoagulant therapy for over 60 years, it remains a challenge to use in clinical practice since several factors may complicate WRN response which expressed is in international normalized ratio (INR). Numerous patient related variations may affect the adequacy of the assay interpretation which may lead to into poor clinical management. This study aims investigating the impact of age, sex, hemoglobin, packed cell volume (PCV), and albumin levels as well as patient adherence and drug-drug interactions (DDI) on coagulation monitoring results. INR was recorded in patients under WRN maintenance therapy (n=96). Hemoglobin, PCV …
Of Bodies And Borders: Syrian Migration To Egypt Through Sudan, Banan Abdelrahman
Of Bodies And Borders: Syrian Migration To Egypt Through Sudan, Banan Abdelrahman
Theses and Dissertations
This research explores Syrian migration movements to Egypt through the Sudanese smuggling route. By grappling with notions of sovereignty, critical geography, mobile subjectivities, and modes of governance, the thesis unpacks the recent flux on the route through describing the journey itself, as well as the way different bodies cross the border and settle. Through the multiple sites the research was conducted in, it seeks to contribute to growing discussions surrounding new understandings of migration. The thesis followed and traced the migration journey, from its beginnings in Khartoum, through Aswan, and ending in Cairo using various methodologies- namely: engaged ethnography and …
Development Of Chitosan 2d Film Scaffolds And Nanoparticles Enriched With Royal Jelly And Grape Seed Extract: Enhanced Antibacterial And Wound Healing Activity, Narguess Marei
Theses and Dissertations
Wound healing using nanomaterials have been increasingly studied due to their remarkable applicability in tissue engineering. Biopolymeric scaffolds have been widely used to fabricate wound dressings and skin substitute. Chitosan the deacetylated form of chitin has received great attention especially in wound healing. Natural extracts such as garlic, curcumin, honey, royal jelly and grape seed extract were used to enhance the fabricated wound dressing materials. In this work, Vitis vinifera (Grape seed extract) and royal jelly were loaded within fabricated low and high molecular weight chitosan 2D film scaffolds and nanoparticles. Vitis vinifera was known with its dermal wound healing …
Synthesis And Characterization Of A Novel Biodegradable Cellulose Acetate-Chitosan Biosorbent For Water Purification And Treatment Purposes, Emad Raafat Farag
Synthesis And Characterization Of A Novel Biodegradable Cellulose Acetate-Chitosan Biosorbent For Water Purification And Treatment Purposes, Emad Raafat Farag
Theses and Dissertations
A novel biosorbent for water desalination and water treatment derived from biodegradable cellulose acetate (CA) and chitosan (CS) was successfully synthesized at optimized synthesis parameters of 1: 1 CA: CS ratio, pH 4, 3 h reaction time, and 120 ± 5 °C. The biosorbent was characterized by Fourier Transform Infra-Red (FTIR) spectroscopy, Brunauer–Emmett–Teller (BET) analysis, Scanning Electron Microscopy (SEM), thermogravimetric analysis TGA, and X-ray diffraction. Sorption of the monovalent and divalent salts (NaCl and MgSO4) was performed in a batch-type system under different operating conditions of time, initial concentration and adsorbent dose. The efficiency of the biosorbent to reject metal …
Repertoires Of Contention Between The Regime And Political Actors, Ereny Zarif
Repertoires Of Contention Between The Regime And Political Actors, Ereny Zarif
Theses and Dissertations
While most of the literature in post-revolutionary Egypt focused on the international spread of repertoires of contention, protesting, organizing and mobilizing techniques, this thesis aims at drawing links between political action before and after the 2011 uprising through studying 1) the influence of regime's tactics on revolutionary's techniques and 2) political actors’ reactions to the existing structures. Building a bridge between both aisles, regime and actors, and studying them as part of the same construction is crucial. Protesters did not only get affected by international repertoires of contention or local ones, but they were also influenced by the authoritarian regime's …
Visions Of Life: Resettlement Expectations Of Refugees In Cairo, Shashikala Visuddhi Perera
Visions Of Life: Resettlement Expectations Of Refugees In Cairo, Shashikala Visuddhi Perera
Theses and Dissertations
This study looked into how refugees in Cairo experience their transition while waiting to be resettled and how and to what extent those experiences shape their expectations of life in the resettlement country. It was conducted among a cohort of Sudanese refugees in the resettlement pipeline living in Cairo using the qualitative research method of phenomenological approach chosen to capture the common elements that individuals living a particular shared experience had with each other. This study found that refugees' expectations are primarily based on rights and liberties that have been denied to them in the land of their birth and …
Acculturating Autocrats: Tracing Compliance With The International Counter-Terror Regime Through An Analysis Of Chad And Libya, 2000-2016, Brandon Shinhearl
Acculturating Autocrats: Tracing Compliance With The International Counter-Terror Regime Through An Analysis Of Chad And Libya, 2000-2016, Brandon Shinhearl
Theses and Dissertations
Compliance with international regimes is a common occurrence in global politics. States often converge towards specific and shared interests and thereby construct principles, norms, rules, and procedures that state behavior within these issue-areas. International regimes encourage states to make changes to their domestic and foreign policies in order to orderly harmonize cooperation, reinforced by benefit. After 9/11 and in the context of global concerns of the international security environment, the international counter-terror regime (ICTR) has induced states to converge towards action regarding terrorism. This regime rests upon specific sets of principles, norms, rules, and procedures aimed at organizing, governing, and …
Resource Aware Space Mission Routing, Sameh Abdelfattah Abdelghany Ibrahim
Resource Aware Space Mission Routing, Sameh Abdelfattah Abdelghany Ibrahim
Theses and Dissertations
In space applications, the mission lifetime is considered one of the most crucial issues. Such missions rely mainly on rovers that move around to sense useful information to be later sent to the earth. The main source of energy in such applications is the solar energy at daytime and then batteries are the only source available at night operation. Due to the scarcity of energy on Mars, a careful design is needed at all levels of the mission to save the energy consumption. The rover communication system consumes a considerable amount of energy during the mission. The used routing protocol …
A Computational Model For Dilated Cardiomyopathy: Morphology And Electromechanics, Andrew Athanasios
A Computational Model For Dilated Cardiomyopathy: Morphology And Electromechanics, Andrew Athanasios
Theses and Dissertations
The aim of this thesis was to develop a computational model that can simulate the key changes in morphology and electrophysiology that are observed in patients of dilated cardiomyopathy (DCM), and to predict the associated diastolic (mechanical) dysfunction. The computational model herein developed was then applied to an in-silico study of cardiac resynchronization therapy (CRT) to assess its potential utility as an investigative tool in clinical research. Specifically, the DCM model herein developed captures three beats of a human heart (male, in his mid-twenties). The case of DCM represented herein also possesses a left bundle branch block (LBBB). LBBB alters …
Sustainable Electrochemical Devices Based On Earth-Abundant Materials For Solar Energy Harvesting And Storage, Menna Tullah Samir Said
Sustainable Electrochemical Devices Based On Earth-Abundant Materials For Solar Energy Harvesting And Storage, Menna Tullah Samir Said
Theses and Dissertations
Over the past two decades, earth has witnessed a seminal growth in the global energy consumption rates accompanied by drastic Carbon dioxide emissions in the atmosphere. Recent callings for sustainable energy systems that can offset the carbon footprint made it inevitable to develop technologies that provide clean fuel alternatives to fossil fuels. Hydrogen can be that alternative as it is an it only produces water as a byproduct during combustion. However current commercial hydrogen production practices are energy consuming, and get their energy from fossil fuels. Solar energy, can be harvested with semiconducting materials. Consequently, it became of great necessity …
Fabrication Of Layer-By-Layer Ecm/Polysaccharides/Electrospun Composite Nanofibrous Scaffolds And Hydrogels For In-Vitro Skin Cell Regeneration, Fatma Nabil El-Shishiny
Fabrication Of Layer-By-Layer Ecm/Polysaccharides/Electrospun Composite Nanofibrous Scaffolds And Hydrogels For In-Vitro Skin Cell Regeneration, Fatma Nabil El-Shishiny
Theses and Dissertations
Skin burn wounds is a crucial issue that could reduce life quality. The novel tri-layered asymmetric porous scaffold has been innovated to mimic the natural skin layers. The scaffold constitutes of upper electrospun Cs-PVA layer and lower xerogel layer that made of effective skin ECM components. Both layers were stuck together by fibrin glue. The developed scaffold resulted in promising swelling capability suitable for absorbing wound exudates, followed by constant degradable weight over time which is appropriate for burn wounds environment. SEM images revealed the presence of significant pore distribution among the electrospun and xerogel layers confirmed by BET analysis. …