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, …
Comparative Performance Evaluation Of Generative Ai-Assisted Acoustic Tiles From Recycled Educational Waste,
2026
Arab Academy for Science and Technology, College of Engineering and Technology, P.O. Box 12577 - smart village, 6 October – Egypt
Comparative Performance Evaluation Of Generative Ai-Assisted Acoustic Tiles From Recycled Educational Waste, Nada Ahmed Talaat, Ahmed Mahmoud Elfakarany, Nihal Atif Salim
HBRC Journal
Noise pollution is increasingly recognized as a critical environmental challenge with direct implications on public health and well-being. In Egypt, data from the Egyptian Environmental Affairs Agency (EEAA, 2019) identify noise as the second most reported environmental concern, affecting both indoor and outdoor spaces. At the same time, the growing volume of waste generated on university campuses represents an underexploited resource for sustainable design. This study addresses these challenges by investigating how generative AI can serve as a design collaborator in suggesting high-performance acoustic tiles from recycled campus waste. Two AI-driven prototypes were developed through prompts emphasizing acoustic absorption, aesthetic …
Glutaraldehyde-Crosslinked Chitosan And Zinc Oxide Coating Reinforced With Polysulfone On Copper As A Platform For Electrochemical Formaldehyde Sensing,
2026
Universitas Jenderal Achmad Yani
Glutaraldehyde-Crosslinked Chitosan And Zinc Oxide Coating Reinforced With Polysulfone On Copper As A Platform For Electrochemical Formaldehyde Sensing, Anceu Murniati Anm, Rahmat Saputra Rs, Arie Hardian Ah, Manty Aldilani Ikaningsih Mai, Moh Haifan Haifan
Chimica et Natura Acta
Formaldehyde monitoring requires electrochemical platforms with stable structures and reliable interfacial responses. This study aimed to prepare and characterize a Cu|CS–GLA/ZnO–PSf composite film on a copper substrate as a platform for further formaldehyde-sensing development. The film was characterized using FTIR, SEM–EDX, XRD, and cyclic voltammetry. FTIR supported the presence of features associated with chitosan, imine, polysulfone, and Zn–O, while SEM–EDX revealed a heterogeneous polymer-rich coating with Zn- and O-containing domains distributed non-uniformly. XRD indicated a predominantly amorphous or poorly crystalline structure. Cyclic voltammetry showed scan-rate-dependent peak separations, with ΔEp increasing from 0.632 to 0.777 V in citrate buffer and from …
Securing The Frontier: Environmental Adaptation Versus Urban Fortification In Strategic Border Gateways: The Case Of East Qantara,
2026
Associate Prof., Faculty of Engineering, Architecture Department, Sinai University, Qantara Branch, Egypt
Securing The Frontier: Environmental Adaptation Versus Urban Fortification In Strategic Border Gateways: The Case Of East Qantara, Ahmed M. Selim, Mohamed A. Shebl, Doha M. Saeed, Heba M. Gaber
HBRC Journal
Security-oriented urban design at strategic national gateways often restricts spatial openness, cultural identity, and social inclusion, all essential to functional public spaces. This study develops a multi-criteria framework for security-inclusive urban design at East Qantara, the primary vehicular gateway between continental Egypt and the Sinai Peninsula. This study employed a sequential quantitative–interpretive design approach. In the quantitative phase, 51 criteria were identified from Crime Prevention Through Environmental Design (CPTED) principles, Hostile Vehicle Mitigation (HVM) guidance, publicness theory, and context-specific desert and socio-cultural literature, and subsequently revised to 37 criteria through expert panel validation. A structured expert questionnaire with a five-point …
Built To Fall: Ruin Value From Romanticist Ideal To Materials Design Philosophy,
2026
Chapman University
Built To Fall: Ruin Value From Romanticist Ideal To Materials Design Philosophy, Vuk Uskoković
Administration and Staff Articles and Research
Ruin value is an architectural principle endorsing the use of designs and materials that would allow buildings to age beautifully and retain their aesthetics even when transformed into ruins. Here, the principle is extracted from the political context in which its proponent, Albert Speer, proposed it and discussed as a continuation of a longer Romanticist tradition of appreciation of weathering and the melancholy beauty of things in decline. Noting its reach well beyond architecture and across other artistic genres, the principle is brought here into the context of natural sciences and the following question is analyzed: Is there room for …
Developing A Digital Facility Management Framework For Enhancing Operation And Maintenance Of Public Parks In Egypt,
2026
PHD – Student Faculty of Fine Arts– Capital University (Formerly Helwan University) AND Teaching assistant of architecture Engineering Department–Higher Institute of Engineering – Al shrouk city (Al shrouk Accademy), Cairo, Egypt
Developing A Digital Facility Management Framework For Enhancing Operation And Maintenance Of Public Parks In Egypt, Alaa Ezzat, Alia Amer, Yasser M. El Sayed
HBRC Journal
Public parks in Cairo represent important urban assets, however, their operation and maintenance (O&M) face many challenges due to fragmented information, reactive maintenance practices, organizational constraints, and limited digital integration. Digital Facility Management discipline still lacks the tailored framework that adequately addresses the operational needs of public parks in Egypt with all its specific details. This study develops an integrated digital FM framework for improving the efficiency of the management process of public parks. A four-phase methodology was adopted, comprising a literature review, framework development, technical system specification, and expert assessment. The proposed framework integrates BIM, COBie, CMMS, IoT technologies, …
Direct Electrochemical Detection Of Carbaryl In Water Using Boron-Doped Diamond Electrodes,
2026
National Taiwan University of Science and Technology
Direct Electrochemical Detection Of Carbaryl In Water Using Boron-Doped Diamond Electrodes, Natasha Fransisca, Chico Permana Putra, Salma Nur Zakiyyah, Muhammad Ihda Hamlu Liwaissunati Zein, Yeni Wahyuni Hartati, Irkham Irkham
Chimica et Natura Acta
Carbaryl (1-naphthyl methylcarbamate) is a carbamate pesticide used to cause adverse environmental and health effects when misused through water contamination. Therefore, this research aimed to develop a direct electrochemical detection method for carbaryl in aqueous media using boron-doped diamond (BDD) electrodes. In this context, BDD electrodes exhibited superior electrochemical performance compared to conventional materials such as gold (Au), platinum (Pt), and glassy carbon electrodes (GCE) due to a wide potential window, low background current, and excellent chemical stability. Cyclic and differential pulse voltammetry reported a well-defined oxidation peak for carbaryl at 1.30 V, with significantly enhanced sensitivity. The results showed …
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 …
The Vegetated-Canopy Roughness Sublayer Through A Tke-Budget Lens,
2026
University of Utah Salt Lake City
The Vegetated-Canopy Roughness Sublayer Through A Tke-Budget Lens, Giulia Salmaso, Raul Bayoan Cal, Marc Calaf
Mechanical and Materials Engineering Faculty Publications and Presentations
It is well understood that vegetated canopies perturb the atmospheric flow within and immediately above the canopy, deviating from the inertial sublayer (ISL) regime characteristic of non-vegetated rough surfaces. Only above a certain height, denoted as the roughness sublayer height (RSL, 𝑧∗), do these flows return to ISL-like behavior. This distinction is critical, as parameterizations in Earth System Models (ESMs) are typically developed for ISL flows. Yet, most 𝑧∗ estimates stem from studies over flat, homogeneous canopies and may be biased. In contrast, little is known about 𝑧∗ in non-homogeneous or heterogeneous canopies that are not of agricultural interest, with …
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 …
Feasibility Of Acetylated Icacina Trichantha Oliv. Tuber Starch As Viscosity And Fluid Loss Control Agents In Water-Based Drilling Mud. A Comparative Assessment With Commercial Starch,
2026
International Institute for Toxicology, Environmental & Occupational Health, and Safety Research, DUFUHS, Uburu, Nigeria
Feasibility Of Acetylated Icacina Trichantha Oliv. Tuber Starch As Viscosity And Fluid Loss Control Agents In Water-Based Drilling Mud. A Comparative Assessment With Commercial Starch, Kennedy I. Ogunwa, Theresa O. Uchechukwu, Ozioma Achugasim, Leo C. Osuji, Onyewuchi Akaranta
Tanzania Journal of Science
The need for sustainable, non-food drilling fluid additives has prompted the feasibility assessment of acetylated Icacina trichantha tuber starch as a viscosity modifier and fluid loss control agent in water-based muds. Native starch was acetylated to obtain two derivatives (Degree of Substitution DS = 0.38 and 0.68) and characterized using FTIR, swelling power, and physicochemical analyses. Drilling mud performance was assessed through rheology, gel strength, filtration loss, sorptivity, and model fitting. Acetylation improved swelling and reduced gelatinization temperature. The optimal formulation, Mud-ITO-ACS2 (DS = 0.68), exhibited the most favorable performance, combining low plastic viscosity (6 cP vs 9 cP for …
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 …
