University of Texas at Arlington
University of South Florida
Guangxi Key Laboratory of Super-hard Material, National Special Mineral Materials Engineering Technology Research Center, China Nonferrous Metals (Guilin) Geology and Mining Co., Ltd. Guilin 541004, China;
University of the Pacific
California Polytechnic State University, San Luis Obispo
Montana Tech Library
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.
Structural And Electrochemical Characterization Of Na2co3/ Γ- Al2o3 Electrodes For Supercapacitor,
2026
Universitas Negeri Malang, Malang, East Java, Indonesia
Structural And Electrochemical Characterization Of Na2co3/ Γ- Al2o3 Electrodes For Supercapacitor, Wiwin Dwiana, Jeniva Dinta Nanda Fahreza, Anissa Chairani Alfin Nadhira, Fatimatuz Zahra, Erma Surya Yuliana, Muhammad Safwan Abd Aziz, Nandang Mufti
Journal of Mechanical Engineering Science and Technology (JMEST)
The development of electrode materials with suitable structural and surface properties is crucial for improving electrochemical energy storage systems. Gamma alumina (𝛾-Al2O3) has attracted considerable interest in electrochemical research due to its unique structural and surface properties. However, its charge-storage capacity is still limited, highlighting the need for structural and compositional modifications to improve its electrochemical performance. In this study, Na2CO3 was introduced into 𝛾-Al2O3 as a sodium precursor to induce phase modification and enhance the electrochemical activity. The systematic incorporation of Na2CO3 also provides an opportunity …
A Systematic Review Of Alkali-Treated Polylactic Acid Biocomposites Relevant To Pineapple Leaf And Water Hyacinth Hybrid Design,
2026
Universitas Negeri Surabaya, Surabaya, Indonesia
A Systematic Review Of Alkali-Treated Polylactic Acid Biocomposites Relevant To Pineapple Leaf And Water Hyacinth Hybrid Design, Muhammad Rizky Adrianto Subandi, Tri Hartutuk Ningsih, Hanna Zakiyya
Journal of Mechanical Engineering Science and Technology (JMEST)
The increasing demand for sustainable materials has accelerated the development of biodegradable polymer composites. Polylactic acid (PLA)-based natural fiber composites have attracted significant attention due to their renewable characteristics; however, their performance remains limited by weak fiber–matrix compatibility, moisture sensitivity, and inconsistent interfacial behavior. Alkali treatment has been widely applied to modify lignocellulosic fibers by removing non-cellulosic components and improving surface characteristics, although its effectiveness remains dependent on treatment conditions and fiber properties. This systematic review evaluates the influence of alkali treatment on PLA-based natural fiber composites and assesses the available evidence supporting future pineapple leaf fiber (PALF) and water …
A Built Environment Framework For Sustainable Urban Transport In Developing Countries: Lessons From Copenhagen,
2026
Assistant Lecturer at the Department of Architecture, Faculty of Engineering, Cairo University, Giza, Egypt
A Built Environment Framework For Sustainable Urban Transport In Developing Countries: Lessons From Copenhagen, Nassamat Mahdy Mohamed, Mohamed Anwer Zayed, Ingy Mohamed El Barmelgy
HBRC Journal
Developing countries are suffering from several urban transport challenges. In addition, global strategies of sustainable urban transport (SUT) lack integration with the seven dimensions of the built environment (7Ds). Therefore, there is a gap between the global strategies and their practical application, especially in the developing countries. To address this gap, this study aims to propose built environment framework for SUT in developing countries. This is addressed by analyzing a selection of global urban transport strategies and extracting consolidated applicable principles, then analyzing Copenhagen as a leading case study in SUT. Based on the research foundation and literature review, the …
Effect Of Cryogenic Soaking Duration On The Crystallographic Structure And Corrosion Resistance Of Astm A36 Steel,
2026
Department of Mechanical and Industrial Engineering, Universitas Negeri Malang, Malang, East Java, Indonesia
Effect Of Cryogenic Soaking Duration On The Crystallographic Structure And Corrosion Resistance Of Astm A36 Steel, Sukri Mubarok, Andoko Andoko, Retno Wulandari
Journal of Mechanical Engineering Science and Technology (JMEST)
This study investigates the influence of cryogenic soaking duration on the crystallographic characteristics and corrosion resistance of ASTM A36 structural steel. Specimens were immersed in liquid nitrogen at −196°C for 0, 12, 36, and 60 hours. Crystallographic analysis was conducted using X-ray diffraction (XRD), while electrochemical corrosion behavior was assessed through Tafel polarization in 3.5% NaCl solution using an Autolab PGstat. Key parameters evaluated included crystallite size, microstrain, dislocation density, corrosion rate, and material degradation. The results showed that soaking up to 36 hours significantly refined the microstructure, as indicated by reduced crystallite size and increased dislocation density and microstrain. …
Thermal Performance Analysis And Heat Transfer Characteristics Of A Solar Powered Paddy Dryer Using A Flat Plate Solar Collector,
2026
Department of Mechanical Engineering, Faculty of Engineering, Universitas Musamus, Merauke, Papua Selatan, Indonesia
Thermal Performance Analysis And Heat Transfer Characteristics Of A Solar Powered Paddy Dryer Using A Flat Plate Solar Collector, Peter Sahupala, Daniel Parenden
Journal of Mechanical Engineering Science and Technology (JMEST)
Freshly harvested paddy holds much water (23.00% wet basis in this study) and spoils quickly without prompt drying. Open sun drying depends on the weather and heats the grain unevenly. This study tested an indirect solar paddy dryer with a 0.60 m² flat plate collector, a 10 kg capacity, and natural convection airflow in Merauke, South Papua. Six thermocouples (collector, drying chamber, and chimney), a pyranometer, and a moisture meter recorded data every 15 minutes at drying temperatures of 40°C, 50°C, and 60°C. The data gave useful heat energy, collector thermal efficiency, and drying rate. Useful heat energy ranged from …
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, …
A Performance-Based Indicator Framework For Assessing Innovative Materials In Modular Emergency Shelters,
2026
Professor of Design and Environmental Control Systems, Architectural Engineering Department, Pharos University in Alexandria, Alexandria 21648, Egypt
A Performance-Based Indicator Framework For Assessing Innovative Materials In Modular Emergency Shelters, Riham Nady Faragallah, M. S. Refaey, Naglaa M. Yussuf, Riham S. Hassan
HBRC Journal
In recent years, the increasing intensity of disasters, conflicts and mass displacement has amplified the need for emergency shelters that are rapidly deployable, structurally safe, and thermally comfortable, particularly when delivered through prefabricated modular systems. The recent development of innovative materials—including smart, recycled, bio-based, and 3D-printed composites—has demonstrated considerable potential for improving emergency shelter performance. However, existing studies primarily evaluate these materials individually, with limited efforts to integrate them into a comprehensive performance-based decision framework for modular emergency shelters. This research aims to develop a performance-based indicator framework for evaluating and selecting innovative materials to enhance the safety, comfort, durability, …
Metal Oxide Semiconductor Gas Sensors For Exhaled Breath Cancer Biomarker Detection,
2026
School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
Metal Oxide Semiconductor Gas Sensors For Exhaled Breath Cancer Biomarker Detection, Guang-Lan Chen, Hui-Hui Luo, Wen-Wen Peng, Shi-Yu Xu, Yu-Ting Li, Hui-Jie Ke, Si-Hui Zhong, Jia-Ao Wei, Tong Chen, Xiao-Kun Li, You-Lin Zhang, Wei Chen
Journal of Electrochemistry
Early cancer screening can significantly improve therapeutic outcomes, volatile organic compounds (VOCs) and other related gases in exhaled breath, as cancer-specific biomarkers, offer a novel approach for non-invasive diagnosis. Metal oxide semiconductor (MOS)-based gas sensors are pivotal for exhaled breath VOCs detection, featuring compact size, cost-effectiveness, and rapid response. This review summarizes the most recent five-year research advances in cancer biomarker detection, and clarifies the core mechanisms of electrical property changes from sensing material-VOCs interactions and key performance metrics including sensitivity, selectivity, humidity tolerance, response/recovery time, stability, and operating temperature. This review also highlights the optimization strategies of sensing materials …
Electrocatalytic Oxidation Of Ethylene Glycol To Glycolic Acid: From Mechanism And Catalyst Design To Emerging Neutral Electrolyte Systems,
2026
Key Laboratory of General Chemistry of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, Sichuan Province, China
Electrocatalytic Oxidation Of Ethylene Glycol To Glycolic Acid: From Mechanism And Catalyst Design To Emerging Neutral Electrolyte Systems, Man Zhang, Xue Li, Xin-Yu Peng, Lin Wang, Wen-Wen Chen, Yao-Yue Yang
Journal of Electrochemistry
Polyethylene terephthalate (PET) waste represents both an environmental burden and a loss of carbon resources. Alkaline depolymerization of PET yields terephthalic acid and ethylene glycol (EG). Electrocatalytic oxidation of EG to glycolic acid (GA), the monomer of biodegradable polyglycolic acid (PGA), offers a sustainable route driven by renewable electricity. However, the ethylene glycol oxidation reaction (EGOR) involves competing pathways toward C2 products (GA and oxalic acid) and C1 products (formic acid and CO2), making selective GA production a central challenge. This review provides a comprehensive overview of recent progress in selective EG-to-GA electrooxidation from catalyst design, mechanistic understanding, …
Regularization-Based Crystallite Size Distribution Analysis Of Pt/C Catalysts From X-Ray Diffraction,
2026
Stack Development Department, Shanghai Hydrogen Propulsion Technology Co., Ltd., Shanghai 201804, P. R. China
Regularization-Based Crystallite Size Distribution Analysis Of Pt/C Catalysts From X-Ray Diffraction, Cheng-Long Ma, Wei-Yu Shi, Zhong-Jun Hou
Journal of Electrochemistry
Accurate determination of the platinum crystallite size distribution in carbon-supported platinum (Pt/C) catalysts is critical for evaluating both the initial performance and long-term durability of proton exchange membrane fuel cells (PEMFCs). Conventional characterization approaches—including transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and the Scherrer equation—are limited by restricted statistical sampling, sensitivity to support interference, or the inability to resolve the full breadth of the size distribution. In this work, we present a regularization-based inversion framework that extracts the volume-weighted crystallite size distribution directly from X-ray diffraction (XRD) line profiles, without requiring any a priori assumption regarding the functional form …
Magnetic Cellulose Nanocrystal Composites Functionalized With Benzalkonium Chloride For Potential Pathogen Control,
2026
University of Dayton
Magnetic Cellulose Nanocrystal Composites Functionalized With Benzalkonium Chloride For Potential Pathogen Control, Kishore Chand, Sydney Herzog, Mohammad Jahid Hasan, Juganta Roy, Moses Ayitey-Adjin Jr., Corbon M. Moss, Sarah Khan, Sara Tester, Monishita Deb, Katherine Schlaak, Sarah Watzman, Yvonne Sun, Esteban Ureña-Benavides, Erick S. Vasquez-Guardado
Chemical and Materials Engineering Faculty Publications
This study presents the design and synthesis of multifunctional magnetic cellulose nanocrystal (CNC) composites engineered for targeted adsorption and broad-spectrum antimicrobial applications. The nanocomposites were fabricated by anchoring mixed-valence Fe3O4 magnetic nanoparticles on eco-friendly CNC frameworks, followed by surface functionalization with benzalkonium chloride (BC), a potent quaternary ammonium biocide. Both sulfated (S) and TEMPO-oxidized CNC (T) variants were investigated across Fe3O4:CNC mass ratios of 1:2 and 1:4. Comprehensive structural, magnetic, and morphological characterization confirmed successful surface modification, superparamagnetic responsiveness, and uniform component dispersion. Thermogravimetric analysis confirmed precise compositional tailoring, capturing up to 87 …
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, …
Toward Mechanical Mismatch Mitigation Enabled By Self-Healing Materials: A Review,
2026
University of Dayton
Toward Mechanical Mismatch Mitigation Enabled By Self-Healing Materials: A Review, Alex Burkhardt
Research from the Berry Summer Thesis Institute, 2026
The rapid evolution of soft robotics, wearable diagnostics, and bio-compatible electronic devices has intensified the demand for resilient, highly deformable materials with the capability to mimic soft biological tissues (skin, organs). A persistent bottleneck in the development of next-generation soft machines is the compliance mismatch at interfaces between conventional, rigid electronic components and soft elastomeric substrates. This disparity in mechanical moduli generates localized strain concentrations during device deformation that can result in delamination, material fatigue, and overall device failure. Although multimaterial or layer-by-layer architectures have been explored to bridge this gap, traditional fabrication methods typically rely on complex manufacturing protocols, …
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 …
