University of South Florida
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;
The American University in Cairo AUC
Guangdong Communication Planning & Design Institute Group Co., Ltd., Guangzhou, Guangdong 510080, China
California Polytechnic State University - San Luis Obispo
The University of Akron
A Maximum Energy Release Rate Computational Framework For Fatigue Crack Trajectory And Life Prediction Under Mixed-Mode Proportional And Nonproportional Loading,
2027
The American University in Cairo AUC
A Maximum Energy Release Rate Computational Framework For Fatigue Crack Trajectory And Life Prediction Under Mixed-Mode Proportional And Nonproportional Loading, Nahla Helmy Matar
Theses and Dissertations
The problem of mixed-mode fatigue crack growth has been a persistent research challenge. The determination of fatigue crack propagation direction directly impacts the safety and integrity of components and structures, making it crucial in various industrial applications, including welded drilling pipes, aerospace, and automotive engineering. Unlike uniaxial loading, mixed-mode cracks tend to change direction frequently (kinking), and nonproportional loading adds to the complexity of the problem. This research aims to estimate the crack propagation direction and fatigue crack life in linear elastic materials subjected to mixed-mode (I+II) loading conditions under proportional or non-proportional cyclic loading. Numerical software was developed based …
Engineering Sulfur Concrete Mixes: A Data-Driven Approach To Aggregate Packing And Binder Efficiency,
2026
Zayed University, Abu Dhabi Campus
Engineering Sulfur Concrete Mixes: A Data-Driven Approach To Aggregate Packing And Binder Efficiency, Vasilia Al Khaldi, Abdel Hamid I. Mourad, Maisa El Gamal
All Works
Processing window (mass loss < 3%). A first-order, order-of-magnitude carbon-footprint estimate—presented with explicit caveats rather than as a full life-cycle assessment—indicates that replacing Portland cement with by-product sulfur is the dominant contributor to a substantial reduction in embodied CO₂ per cubic metre relative to equivalent-strength Portland cement concrete. The valorization of steelmaking by-products aligns with circular economy principles, enabling high-performance, recyclable, and low-carbon construction materials without chemical binder modification.
A Review Of Gallium And Germanium Recovery From Industrial Solid Residues,
2026
Missouri University of Science and Technology
A Review Of Gallium And Germanium Recovery From Industrial Solid Residues, Ernest V. Oteng, Marthias Silwamba, Lana Alagha, Alex Luyima
Mining Engineering Faculty Research & Creative Works
The global demand for critical elements such as gallium (Ga) and germanium (Ge), and the shift toward circular mining has accelerated the development of new extraction and recovery processing these metals from industrial solid residues. This transition is driven by a substantial surge in demand for advanced technologies and the depletion of primary ore. Consequently, industrial solid residues, particularly zinc processing residues, smelter slags, flue dusts, and coal fly ash, are emerging as viable alternative sources. These residues incorporate Ga and Ge through isomorphic substitution in phases such as ferrites, silicates, and glassy aluminosilicates, and are enriched by industrial processes, …
Thermo-Mechanical Behaviour Of Metal-Coated Optical Fibers For Distributed High-Temperature Sensing: From Laboratory Characterization To Industrial Case Validation,
2026
Missouri University of Science and Technology
Thermo-Mechanical Behaviour Of Metal-Coated Optical Fibers For Distributed High-Temperature Sensing: From Laboratory Characterization To Industrial Case Validation, Koustav Dey, Rony Kumer Saha, Bohong Zhang, Laura Bartlett, Jeffrey D. Smith, Ronald J. O'Malley, Jie Huang
Electrical and Computer Engineering Faculty Research & Creative Works
Reliable distributed temperature sensing in high-temperature environments remains a significant challenge due to the thermal and mechanical limitations of conventional optical fibers. In particular, polymer-coated fibers degrade above ∼300 °C due to coating failure, mechanical fragility and hydrogen ingress. Metal-coated optical fibers offer a robust alternative for harsh environments such as Electric Arc Furnaces (EAFs), aerospace engines, nuclear systems, and oil and gas wells, owing to their superior mechanical strength and hermetic sealing. In this work, a first comprehensive experimental investigation of the thermo-mechanical behavior of metal-coated optical fibers for distributed high temperature sensing is presented over a wide temperature …
Sensors And Smart Food Packaging For Supply Chains: Bridging Expiration Dates And Actual Perishability,
2026
Khalifa University
Sensors And Smart Food Packaging For Supply Chains: Bridging Expiration Dates And Actual Perishability, Muhammad Umar Azam, Jolina Rodrigues, Mohamed Hamid Salim, Sarath Haridas Kaniyamparambil, Khalid Askar, Imane Belyamani, Blaise L. Tardy, Nouha Alcheikh
All Works
The food supply chain is undergoing critical changes to minimize environmental hazards, such as those associated with packaging, and reduce food waste and loss. One of the critical components of the latter is associated with the high variance in the perishability of individual foodstuffs. Herein, we review the state of the art in smart sensor systems and emphasize the critical role they could play in addressing the mismatch between “batch” based expiry dates and individual food products’ time-dependent responses to spoilage. Following a brief overview of food shelf life and associated legislation, a subsequent section summarizes the development of sensors …
Settling Method For Decolorization Of Low Molecular Weight Polyethylene,
2026
Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Settling Method For Decolorization Of Low Molecular Weight Polyethylene, Adham E. Norkobilov, Ravshan I. Adilov, Bobur B. Aykhodjaev, Saparboy B. Yuldoshev, Lobar Sh. Kholmirzayeva
CHEMISTRY AND CHEMICAL ENGINEERING
This study investigates the bleaching of low molecular weight polyethylene (LMWPE) by the settling (sedimentation) method. LMWPE is a by-product of polyethylene production whose discoloration is associated with trace amounts of conjugated, oxidized, and polar micro-fractions. The research was conducted in three stages: selection of the appropriate sample grade, determination of the optimal settling time, and evaluation of the temperature effect on the settling process. Results showed that only Grade-1 LMWPE samples are suitable for the settling method; Grade-2 samples yielded insufficient results and are recommended for bentonite adsorption treatment instead. Optimal settling conditions were established as 150 °C for …
Structural And Physico-Mechanical Properties Of Geomembranes Based On Recycled Polyolefins Modified With Argillite From The Sherabad Deposit,
2026
Termez Branch of the Tashkent Medical Academy, Termez, Uzbekistan
Structural And Physico-Mechanical Properties Of Geomembranes Based On Recycled Polyolefins Modified With Argillite From The Sherabad Deposit, Munisa N. Davronova, Furqat B. Eshkurbonov, Azim P. Khamidov, Asal A. Ashurova, Raykhona I. Abdullayeva
CHEMISTRY AND CHEMICAL ENGINEERING
This study investigated the effect of argillite, sourced from the local Sherabad deposit and modified with maleic anhydride, on the physical and mechanical properties of geomembranes based on recycled high-density polyethylene (r-HDPE), recycled low-density polyethylene (r-LDPE), and recycled polypropylene (r-PP). Maleic anhydride was used as a compatibilizer to ensure interfacial adhesion between the polymer matrix in the hydrophilic filler and the layered aluminosilicates, and to promote the uniform distribution of mineral particles. The experimental results showed that hybrid modification makes it possible to elevate the strength properties of all types of recycled polymers to the level of their virgin (pure) …
Physical-Chemical Properties Of Nmgca-Fertilizers Obtained On The Basis Of Ammonium Nitrate And Vermiculite,
2026
Karakalpak State University, Nukus, Uzbekistan
Physical-Chemical Properties Of Nmgca-Fertilizers Obtained On The Basis Of Ammonium Nitrate And Vermiculite, Madiyar J. Jabbarbergenov
CHEMISTRY AND CHEMICAL ENGINEERING
Although ammonium nitrate (AN) ranks second after urea among nitrogen fertilizers in terms of production and application volume, it remains the leading agent regarding plant nutrient uptake efficiency. This is primarily because nearly the entire total nitrogen content is assimilated in both ammonium (NH4+) and nitrate (NO3-) forms. However, the widespread agricultural utilization of AN is significantly constrained by several disadvantageous factors, including its physiological acidity, high hygroscopicity, caking tendency, low granule strength, thermal instability, and high explosive hazards. In this study, to enhance the commercial and physical-chemical properties of AN, a vermiculite mineral modifier was incorporated. The chemical composition …
Improved Electromechanical Response And Relaxor Ferroelectric Behavior In (76–X)Bi₁/₂Na₁/₂Tio₃–24srtio₃ Ceramics Modified With Bifeo₃ And Bialo₃,
2026
Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan
Improved Electromechanical Response And Relaxor Ferroelectric Behavior In (76–X)Bi₁/₂Na₁/₂Tio₃–24srtio₃ Ceramics Modified With Bifeo₃ And Bialo₃, Muhammadali K. Nigmatjanov, Farrukh B. Erkinov, Shoira A. Kadirniyazova
CHEMISTRY AND CHEMICAL ENGINEERING
Piezoelectric ceramics are smart functional materials capable of converting mechanical energy into electrical energy and vice versa, making them indispensable for modern sensors, transducers, and precision actuators. Historically dominated by lead-containing materials like Pb(Zr,Ti)O₃ (PZT), strict environmental regulations and health concerns have driven an urgent global shift toward eco-friendly alternatives. Currently, bismuth sodium titanate (Bi₁/₂Na₁/₂TiO₃–BNT)-based solid solutions are at the forefront of lead-free piezoceramic trends due to their excellent polarization and electromechanical coupling properties. In this study, lead-free piezoelectric ceramics based on the (76–x)Bi₁/₂Na₁/₂TiO₃–24SrTiO₃ (BNST24) system were synthesized, and their structural, dielectric, and electromechanical properties were systematically investigated. This study …
Research Of The Binary Content Of Transition Metal Oxides Of Cu, Mo And W On The Properties Of Semi-Frit Glazes,
2026
Belarusian State Technological University, Minsk, Belarus
Research Of The Binary Content Of Transition Metal Oxides Of Cu, Mo And W On The Properties Of Semi-Frit Glazes, Mihail V. Dyadenko, Ivan A. Levitskiy, Mastura Kh. Aripova
CHEMISTRY AND CHEMICAL ENGINEERING
The results of a study of the binary content of transition metal oxides CuO + MoO3; CuO + WO3 and a combination of MoO3 + WO3 on the physico-chemical properties of glaze coatings and their antibacterial activity are presented. A polycomponent raw material composition has been studied, including aluminum-sulfate high-calcium frit, the indicated antibacterial components, as well as feldspar, dolomite, and additives of alumina, quartz sand, kaolin, and refractory clay. Optimal technological modes of preparation of suspensions, their application to a ceramic base, followed by firing at a temperature of 1200 ± 5 ° C have been determined. Decorative, physico-chemical …
Experimental Study On The Behavior Of High-Strength Reinforced Concrete Beams With A Longitudinal Void, With And Without Micro Steel Fibers, At Different Shear Spans,
2026
Department of civil engineering, College of Engineering, Mustansiriyah University. Baghdad 10001, Iraq
Experimental Study On The Behavior Of High-Strength Reinforced Concrete Beams With A Longitudinal Void, With And Without Micro Steel Fibers, At Different Shear Spans, Farah M. Hussein, Saif Altai, Shatha Alasadi, Ayoob A. Ibrahim, Arshad Nadhom Shubber
Journal of Sustainable Construction Materials and Technologies
This study examines the impact of creating a longitudinal void in high-strength reinforced concrete (RC) beams to decrease concrete volume. Testing involved three groups: solid beams (SB), beams with a 75 mm void (VB), and beams with a void incorporating 1.2% micro-steel fibers (VBSF), across various shear spans (a/d) of 1.8, 2.7, and 3.6. Results indicated that increased a/d led to a 54.2% reduction in peak loads and a 119.2% increase in deflection for solid beams. The void negatively affected load-bearing at a/d = 1.8 with a 25% peak load reduction and brittle failure. At a/d = 2.7, effects were …
Dense Platinum Nanoparticles Confined In Mn-N-C Nanocages For Robust Heavy-Duty Pemfcs,
2026
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, P.R. China; School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, P.R. China
Dense Platinum Nanoparticles Confined In Mn-N-C Nanocages For Robust Heavy-Duty Pemfcs, Lei Zhao, Zhen-Min Cao, Jia-Yu Zuo, Ming-Liang Yang, Hong-Yan Qiao, Jun-Song Chen, Rui Wu
Journal of Electrochemistry
High-loading Pt cathodes are essential for heavy-duty proton exchange membrane fuel cells but suffer from a critical tradeoff between ionomer sulfonate poisoning and nanoparticle instability. Herein, we report a spatial confinement strategy to encapsulate dense Pt nanoparticles (~51.8 wt%) within Mn/N-co-doped mesoporous carbon nanocages (denoted as Pt-MnNC). This architecture excludes bulky ionomers to create an ionomer-shielded environment against sulfonate poisoning, while Mn-Nx-mediated strong metal-support interactions anchor the Pt nanoparticles to prevent agglomeration and further boost durability. In the 5 × 5 cm2 membrane electrode assembly tests, the Pt-MnNC catalyst delivers an exceptional power density of 1.26 W·cm …
Efficient Acidic H2O2 Electrosynthesis Over Co Atoms Anchored On Nitrogen-Doped Hierarchical Porous Carbon,
2026
State Key Laboratory of Green and Efficient Development of Phosphorus Resources, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China; Hubei Key Laboratory of Processing and Application of Catalytic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 438000, China
Efficient Acidic H2O2 Electrosynthesis Over Co Atoms Anchored On Nitrogen-Doped Hierarchical Porous Carbon, Xiao Huang, Zi-Hao Zhan, Hao-Xu Niu, Guan-Yu Luo, Jin-Tao Huang, Bo-Xuan Jin, De-Li Wang
Journal of Electrochemistry
The two-electron oxygen reduction reaction (2e− ORR) presents a promising route for the on-site production of hydrogen peroxide (H2O2), offering a green alternative to energy-consuming anthraquinone process. However, the high selectivity toward the competing 4e− ORR over the desired 2e− pathway leads to low Faradaic efficiency for H2O2, posing a critical challenge in catalyst design. In this work, a nitrogen-doped hollow hierarchical porous carbon with anchored Co atoms (CoN/HPC) was constructed for high-performance H2O2 production. The as-prepared Co-N/HPC catalyst showed excellent 2e− ORR performance, achieving …
Engineering Small-Sized Cations With Strong Solvation For High-Voltage Supercapacitors,
2026
College of Materials Science and Engineering, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tiangong University, Tianjin 300387, China
Engineering Small-Sized Cations With Strong Solvation For High-Voltage Supercapacitors, Tong Huo, Pan Liu, Hao Chen, Peng Zhang, Zhen-Lei Chen, Guo-Fu Sun, Zhi-Qiang Shi, Jing Wang
Journal of Electrochemistry
Supercapacitors (SCs) have attracted much attention in the field of energy storage due to their high power density and long cycle life. However, their relatively low energy density limits their application in a wider range of fields. Methods to increase energy density include enhancing specific capacitance and extending operating voltage window. Herein, we report a novel electrolyte salt, tetramethylammonium bis(fluorosulfonyl)imide (TMA-FSI), the resulting electrolyte formed with propylene carbonate (PC), designated as TMF, exhibited a wide electrochemical stability window (ESW) of 5.09 V. On the one hand, we found that the small size of TMA+ enables it to enter the …
Modeling Urban Heat Island Mitigation Strategies In Egyptian Cities Using Envi-Met,
2026
Advanced Data Science Expert, Advanced Telecommunications Solutions & Services (ATSS) Company, Riyadh, Saudi Arabia
Modeling Urban Heat Island Mitigation Strategies In Egyptian Cities Using Envi-Met, Islam M. Gaber, Abbas M. Hassan, Tarek Elkashef, Ola A. Gad, Ahmed M. Abdo, Abdelrazek Elkomy
HBRC Journal
Mitigation techniques for urban heat islands (UHI) have emerged as a critical concern for global urban environmental sustainability. Passive cooling employing cool materials and/or urban greening has shown to be the most effective strategy for mitigating the impacts of UHI. This latter method, however, is relatively new in the literature of urban environmental studies, and research on it is still limited, particularly for cities in hot-dry climatic zones. This study aims to investigate the possibility of improving albedo rates and adopting urban greening measures, such as greening building roofs, roadways, and walkways, in several Egyptian cities located in various climatic …
Improving Mechanical Properties Of Soft Clay By Deep Soil Mixing In North Delta, Egypt Vs. Finite Element Simulation,
2026
PhD Student in Civil Engineering Department, Al-Azhar University, Cairo, Egypt
Improving Mechanical Properties Of Soft Clay By Deep Soil Mixing In North Delta, Egypt Vs. Finite Element Simulation, Ali Gamal Abdel Zaher, Sherif Abdelaziz Mazek, Samir Abdelfattah, Mostafa Merzk
HBRC Journal
Soft clay layers in the Northern Nile Delta pose significant geotechnical challenges due to low shear strength, high compressibility, and susceptibility to settlement. This study implements a section of a canal embankment in the field using Deep Soil Mixing (DSM) with a cement content of 165 kg/m3 and aims to evaluate its effectiveness in stabilizing soft clay while providing practical design tools for similar deltaic environments. Long-term field monitoring and laboratory testing, including UCS and permeability measurements, were conducted to support the analysis. A Finite Element Model (FEM) was developed in PLAXIS 2D v21 and calibrated against field data, …
Integrated Fire Protection Design In Pharmaceutical Manufacturing Facilities: An Applied Case Study,
2026
MSc Candidate, Department of Architecture, Faculty of Engineering, Al-Azhar University, Egypt
Integrated Fire Protection Design In Pharmaceutical Manufacturing Facilities: An Applied Case Study, Eman Osman Mahmoud Osman, Fouad Abdel-Mawgoud Abdel-Halim Qasim, Alaa El-Din El-Sayed Farid Hassan
HBRC Journal
The architectural design of pharmaceutical manufacturing facilities presents a complex engineering challenge, requiring simultaneous compliance with Good Manufacturing Practice (GMP) containment standards and life safety egress codes. This research presents an applied methodology for integrated fire protection design in sterile pharmaceutical environments, demonstrated through a case study of a manufacturing complex comprising cleanroom production zones and high-bay storage warehouses with heights reaching 14.8 m. The study reconciles facility classification under the Egyptian Fire Code and NFPA standards by defining Occupancy Hazard Groups W-1 and W-2 (high- and moderate-hazard storage), while utilizing regulatory Code Tables C-1 and C-2 to calculate occupant …
Physical Modeling To Represent Molten-Slag Entrapment Behavior Into Molten-Steel Under Simultaneous Similitude Condition Of Multiple Dimensionless Numbers,
2026
Nippon Steel Corporation
Physical Modeling To Represent Molten-Slag Entrapment Behavior Into Molten-Steel Under Simultaneous Similitude Condition Of Multiple Dimensionless Numbers, Yuichi Tsukaguchi, Sho Nakano
Progress in Scale Modeling, an International Journal
Physical model construction and experiment are essential for scientific investigations of flow phenomena such as high temperature two phase flow of molten metal and inert gas. It has been a common method to construct a physical model with a convenient scale then proceed experiments under similitude condition of one or two dimensionless number(s) of dominant forces to represent. It is an ideal experimental method to satisfy the simultaneous similitude condition of multiple dimensionless numbers concerned with the objective flow phenomena but has been considered difficult or impossible to realize for many years. Contrarily, the concept of the simultaneous similitude of …
Aerodynamic Effects Optimisation Of Water-Powered Funicular Car Body Exposed To Headwind And Crosswind,
2026
State Polytechnic of Malang, Malang, East Java, Indonesia
Aerodynamic Effects Optimisation Of Water-Powered Funicular Car Body Exposed To Headwind And Crosswind, Theodorus Agung Wicaksono, Bagus Wahyudi, Syamsul Hadi, Wirawan Wirawan, Hangga Wicaksono
Journal of Mechanical Engineering Science and Technology (JMEST)
Water-powered funicular railways are an environmentally friendly mode of transport whose efficiency heavily depends on the principle of gravity. However, their operation is vulnerable to natural wind disturbances that can hinder speed or cause a risk of overturning on steep, curved tracks. This study aims to analyse the influence of funicular car model design on the rolling moment exerted on the rails as the car turns to enter a track branch. The research methodology involves aerodynamic simulations using SolidWorks flow simulation, comparing three body models: WAHYUDI, FUNAERO, and AEROFUN. Simulations were conducted with variations in turn angles (10° to 30°) …
Parametric Study On The Plastic Hinge Length Of Precast Concrete Columns With Grouted Sleeve Connections,
2026
Universitas Pembangunan Nasional ``Veteran'' Jawa Timur, Raya Rungkut Madya Street, Surabaya (60294), Indonesia
Parametric Study On The Plastic Hinge Length Of Precast Concrete Columns With Grouted Sleeve Connections, Rizky Tri Amalia, Harun Alrasyid
Journal of Sustainable Construction Materials and Technologies
The use of precast concrete structures with grouted sleeve (GS) connections has gained significant traction in the acceleration of bridge construction. The plastic hinge length (Lp) is a critical parameter for assessing the seismic performance and deformation capacity of such structural members. The previous study has proposed empirical equations for Lp in monolithic columns; however, a comprehensive understanding of the influential parameters on Lp in precast concrete columns with GS connections remains limited. This study presents a detailed parametric investigation to evaluate the effects of key design parameters on the plastic hinge length of a precast concrete columns with GS …
