Engineering Science and Materials Commons^™

Engineering Nanoelectrocatalytic Systems For Co2 And Nitrate Conversion Into Value-Added Chemicals, Abdelrahman Mohamed Abdelmohsen

Theses and Dissertations

The thesis addresses two major related environmental crises: nitrate pollution of water systems and the ever-increasing levels of atmospheric carbon dioxide. Both challenges are closely linked to anthropogenic disturbance of nitrogen and carbon cycles and require sustainable, energy efficient mitigation techniques. In this study, we investigate electrochemical conversion routes as a unified approach to convert these pollutants into value-added compounds: ammonia (NH3) via nitrate reduction (NO3-RR) and ethylene (C2H4) via carbon dioxide reduction (CO2RR). The first half of this work deals with the design and engineering of Cu-Zn alloy electrocatalysts for efficient NO3-RR. Tuning the alloy composition and surface nanostructure …

Green Roofs For Grey Water Treatment – Comparative Study Of Economic And Environmental Impacts, Shaden S. Attia

Theses and Dissertations

Cities are under more pressure than ever to use sustainable methods for managing water and other resources because of urbanization, climate change, and a lack of water. Standard greywater treatment systems (SGTSs) work well, but they use a lot of resources and don't provide a lot of ecosystem services. Greywater-treating green roofs (GTGRs) have emerged as a promising Nature-Based Solution (NBS), combining wastewater recycling with benefits like regulating temperature, reducing greenhouse gas (GHG) emissions, and reducing the urban heat island (UHI) effect. Even with this potential, there is still not enough real-world research on how GTGRs affect both the economy …

Sustainable Construction Materials In The Middle East: Model Development For Materials Selection, Taha Ahmed Omar Madu

Theses and Dissertations

The construction industry, a major driver of economic development in the Middle East, is simultaneously a leading contributor to carbon emissions, resource depletion, and environmental degradation. Amid rapid urbanization in countries such as Egypt, Saudi Arabia, and the United Arab Emirates, the adoption of sustainable construction materials has emerged as a critical strategy for mitigating environmental and societal impacts while advancing regional development objectives. This thesis is organized along two interrelated directions: first, it delivers a comprehensive assessment of the current adoption, challenges, and opportunities associated with the use of sustainable construction materials across the three target countries; second, it …

Mechanical Characterization And Modeling Of Rat Myocardia Under The Influence Of Epirubicin, Abdallah Mahmoud Alkhaiyat

Theses and Dissertations

Cancer remains a predominant health challenge that is responsible for a significant portion of global morbidity and mortality. Epirubicin (EPI), a chemotherapeutic anti-cancer drug, has shown remarkable efficacy in combating various malignancies. However, it is known to have undesirable side effects on the heart, collectively referred to as cardiotoxicity. This research investigates the adverse effects of chemotherapy on cardiac contractility through an in vitro examination of the mechanics of healthy and infarcted animal heart tissues. Electrically stimulated slices of rat ventricular tissue were tested using an isometric force measurement tissue bath. The tissue slices were subjected to uniaxial stretching, allowing …

Fly Ash Proppant Developed For Hydraulic Fracturing, Raz Rzgar Haydar

Theses and Dissertations

Proppants are critical components in hydraulic fracturing, used to maintain fracture conductivity and enhance reservoir stimulation. In high-pressure and harsh reservoir environments, the use of high-strength proppants is essential to ensure well performance. Conventional proppants, being sand, ceramic, and sintered bauxite can be expensive, and their use often requires costly fracture fluids. This study investigates the possibility of utalizing fly ash geopolymers as a sustainable alternative that is also cost-effective for proppants manufacturing. Fly ash, a by-product from the combustion of coal and other materials, was explored as a base material for proppants, utilizing an alkaline solution as an activator …

Detecting Electrical Submersible Pump (Esp) Failures And Estimating Run Life Using Artificial Neural Networks, Mostafa Ahmed Sobhy

Theses and Dissertations

Electric Submersible Pumps (ESPs) are one of the important artificial lift methods for sustaining production in mature and high-water-cut wells; but may suffer frequent failures due to mechanical, electrical, hydraulic, chemical, and operational failures. These failures can yield substantial deferred production and intervention costs. Plenty of ESP installations are fitted with downhole sensors. Yet, it is observed that the current industry practice underutilizes the wealth of available sensor and operational data and lacks standardized, explainable failure-type identification and classification.

In this thesis, a comprehensive Machine Learning (ML) and Deep Learning (DL) framework was introduced for ESPs that simultaneously estimates remaining …

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- …

Shape Memory Alloy Capsule Micropump For Drug Delivery Applications, Youssef Mohamed Kotb

Theses and Dissertations

Implantable drug delivery devices have many benefits over traditional drug administration techniques and have attracted a lot of attention in recent years. By delivering the medication directly to the tissue, they enable the use of larger localized concentrations, enhancing the efficacy of the treatment. Passive-release drug delivery systems, one of the various ways to provide medication, are great inventions. However, they cannot dispense the medication on demand since they are nonprogrammable. Therefore, active actuators are more advantageous in delivery applications. Smart material actuators, however, have greatly increased in popularity for manufacturing wearable and implantable micropumps due to their high energy …

Properties Of Portland Cement Concrete Incorporating Basalt-Based Pozzolanic Cement, Rana Khalil

Theses and Dissertations

Over the last decade, the world's population has increased dramatically. Due to this growth, the demand for concrete and Portland cement, in return, have increased. Manufacturing of Portland cement is an energy-intensive process that, alone, contributes to about 8% of global CO2. For decades, efforts have been exerted to reduce the harmful environmental impacts of Portland cement by reducing its use in concrete as well as considering alternate binders that may fully or partially replace it. This study aims to assess the properties of concrete incorporating a novel basalt-based pozzolanic cement. To meet this objective, four sets of concrete mixtures …

Mechanical And Electromagnetic Properties Of Incorporating Graphene Oxide In Cementitious Mixtures, Cherif Khalil

Theses and Dissertations

This multidisciplinary study aimed at investigating the impact of incorporating graphene oxide (GO) on the mechanical properties and electromagnetic (EM) shielding effectiveness of cementitious mixtures, as well as critically examining the mechanism with which GO affects their microstructure properties. Analysis of the literature review showed that there are discrepancies in reporting the impact of GO on the mortar mix. Consequently, this study focuses on exploring the cause for such discrepancies and identifies three main factors which are thoroughly investigated. The factors were the different sonication energies applied to the GO (Shear Mixing, 1.5 kJ/ml, 3 kJ/ml and 6 kJ/ml), the …

Review Paper: Low Salinity Water Injection For Enhanced Oil Recovery, Mahmoud Ali, Moamen Talaat, Abd El-Rahman Rashwan

The Undergraduate Research Journal

Low salinity water injection (LSWI) is one of the leading techniques in terms of enhancing oil recovery in sandstone and carbonate formations. Many studies and lab experiments were performed on the LSWI applications. Some studies have pointed out multiple negative observations, while other studies have shown the positive potential of using LSWI in enhancing oil recovery. However, the technology used in LSWI applications is still considered new and more studies need to be performed to figure out new technologies that are low-cost and more efficient. This review paper examines LSWI by analyzing the benefits and drawbacks of employing LSWI in …

Influence Of Processed Natural Black Sand Vs. Natural White Sand And Silica Flour As Additives To Oil-Well Cementing Applications, Ramy Abuel Maaty

Theses and Dissertations

Cementing is a crucial and fundamental step in the process of drilling wells to extract oil from its reservoirs. Cementing main functions are to achieve zonal isolation and provide mechanical support to the casing. Impermeable and powerful cement is strongly desired to withstand high pressures and temperatures during the lifetime of the producing wells. Various additives to cement, such as silica flour, fly ash, Nano-additives and other advanced materials have been used and tested to attain improved cement of higher quality and enhanced properties such as permeability, porosity, mechanical and rheological properties. Very few researches have discussed the uses of …

A Simulation Model To Determine The Supply Chain Optimum Order Quality, Ahmed Mohamed Saleh

Archived Theses and Dissertations

No abstract provided.

Design Methodology For Input Shapers Using Genetic Algorithms In Flexible Nonlinear Systems, Mohab Adel Hakim Meshreki

Archived Theses and Dissertations

No abstract provided.

Fluid-Structure Interaction Of Nrel 5-Mw Wind Turbine, Mohamed Sayed Elkady Abd-Elhay

Theses and Dissertations

Wind energy is considered one of the major sources of renewable energy. Nowadays, wind turbine blades could exceed 100 m to maximize the generated power and minimize produced energy cost. Due to the enormous size of the wind turbines, the blades are subjected to failure by aerodynamics loads or instability issues. Also, the gravitational and centrifugal loads affect the wind turbine design because of the huge mass of the blades. Accordingly, wind turbine simulation became efficient in blade design to reduce the cost of its manufacturing. The fluid-structure interaction (FSI) is considered an effective way to study the turbine's behavior …

A Computational Study Of Cocrfeniti High Entropy Alloys: Phase Diagrams, Thermodynamics, And Mechanical Properties From Calphad And First Principles, Geraldine Anis

Theses and Dissertations

High entropy alloys (HEAs) are multi-component alloys, which are often defined as those consisting of at least 5 principal elements with concentrations ranging between 5 and 35 atomic weight percent (at.%). Since their introduction by Yeh et al. and Cantor et al. in 2004, HEAs have been found to possess many important properties and have become prime candidates for several high-performance applications such as high-temperature and biomedical applications. Despite their multi-principal element nature, many HEAs favor the formation of solid solution phases as opposed to the intermetallic phases expected for such systems. This was originally only attributed to their high …

Effect Of Heat Treatment On Microstructure, Hardness & Superelasticity Of Severely Deformed Niti, Omar Bahy El-Din Mortagy

Archived Theses and Dissertations

No abstract provided.

Factors Affecting National Technological Absorptive Capacity, Karim Fathy Saad

Archived Theses and Dissertations

No abstract provided.

Using Neural Networks To Identify The Effect Of Construction Factors On The Cost Of Reinforced Concrete Elements, Ahmed Aly El-Sotouhy

Archived Theses and Dissertations

No abstract provided.

Utilization Of Municipal Solid Waste Rejects In The Production Of A Recycled Plastic Waste Composite Material, Mohamed Kamal Abou Khatwa

Archived Theses and Dissertations

The solid waste disposal problem has grown significantly in the last decades imposing a lot of pressure on disposal and treatment acts. In the past, incineration and landfilling were the common methods for disposing of products of municipal solid waste. With the increasing volumes of waste generation and the legislative restrictions of these treatment methods, reuse of bulk waste is foreseen as the best alternative to disposal. Due to the current widespread use of plastic products in daily life, post consumer plastics now contribute significantly to municipal solid waste generation rates with a contradicting low participation in waste minimization practices. …

Classification Of Risks For International Construction Joint Ventures Projects, Yasser Abd El Ghany Azmy Elshabassy

Archived Theses and Dissertations

No abstract provided.

Factors Affecting The Quality Of Dry Shotcrete, El Rasheid Mohamed Abdalla El Khidir

Archived Theses and Dissertations

No abstract provided.

Corrosion Inhibitor For Reinforcing Steel In Concrete, Hanan Abdel Aziz Elnouhy

Archived Theses and Dissertations

No abstract provided.

Waste Steel Chips From Workshops As A Substitute For Fiber Reinforcement In Concrete, Alaa Abdultawab Abulella

Archived Theses and Dissertations

No abstract provided.

Thermal Behavior Of Energy Storage System In A Cylindrical Tank, Walid Wagih Darwish

Archived Theses and Dissertations

No abstract provided.

Estimation Of Internal Forces And Moments In Linearly Vibrating Beam Structures, Doris Yasmou Yacoub

Archived Theses and Dissertations

No abstract provided.

Permeability Control Using Polymer Impregnation In Sandy Soil, Mohamed Salah Mohamed Ahmed

Archived Theses and Dissertations

No abstract provided.

Electrorheological Fluids And Their Application In Automotive Clutches: Design Procedures And Recommendations, Ihab Fahmy

Archived Theses and Dissertations

No abstract provided.

Behavior Of Concrete Masonry Prisms Under Axial Compression, Tarek Ghoneim Mohamed Ghoneim

Archived Theses and Dissertations

No abstract provided.

Evaluation Of Dynamic Stresses And Fatigue Life Prediction For Randomly Loaded Structure, Walied Ahmed Moussa

Archived Theses and Dissertations

No abstract provided.