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Journal of Materials Science & Technology 2021年第36期95卷 145-157页

作者： S.Samat M.Z.Omar A.H.Baghdadi i.f.mohamed A.Rajabi A.M.Aziz Department of Mechanical and Manufacturing Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangiUKM 43600Malaysia

Al–Si–Cu–Mg foundry alloys are used in casting process ***,their strength properties remain low due to their microstructural characteristics and *** this work,the microstructural characteristics,dislocation densities,and mechanical properties of Al–Si–Cu–Mg cast alloys prepared through different casting methods were studied *** casting processes,namely,gravity casting(GC),rheocasting(RC),thixoforming(Thixo),and Thixo with heat treatment,were *** GC and RC samples had mainly dendriticα-Al phase microstructures and exhibited coarse Si particles and intermetallic compounds in their interdendritic *** contrast,the Thixo and heat-treated Thixo(HT-Thixo)samples exhibited microstructural refinement with uniformly distributedα-Al globules,fine fibrous Si particles,and fragmented intermetallic compounds amongα-Al *** accumulation of dislocation densities increased in the Thixo sample as the strain was increased due to plastic ***,the ultimate tensile strength and yield strength of the HT-Thixo sample increased by 87%and 63%,respectively,relative to those of the GC *** cleavage fracture displayed by the GC and RC samples led to brittle ***,the Thixo and HT-Thixo samples presented dimple-based ductile fracture.

关键词： Al–Si–Cu–Mg alloy Thixoforming Microstructure Mechanical property Dislocation density

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An Enhanced Lung Cancer Detection Approach Using Dual-Model Deep Learning Technique

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 835-867页

作者： Sumaia mohamed Elhassan Saad mohamed Darwish Saleh Mesbah Elkaffas Department of information Technology Institute of Graduate Studies and ResearchAlexandria UniversityAlexandria21526Egypt College of Computing and information Technology Arab Academy for ScienceTechnology and Maritime TransportAlexandriaP.O.Box 1029Egypt

Lung cancer continues to be a leading cause of cancer-related deaths worldwide,emphasizing the critical need for improved diagnostic *** detection of lung tumors significantly increases the chances of successful treatment and ***,current diagnostic methods often fail to detect tumors at an early stage or to accurately pinpoint their location within the lung ***-model deep learning technologies for lung cancer detection,while beneficial,cannot capture the full range of features present in medical imaging data,leading to incomplete or inaccurate ***,it may not be robust enough to handle the wide variability in medical images due to different imaging conditions,patient anatomy,and tumor *** overcome these disadvantages,dual-model or multi-model approaches can be *** research focuses on enhancing the detection of lung cancer by utilizing a combination of two learning models:a Convolutional Neural Network(CNN)for categorization and the You Only Look Once(YOLOv8)architecture for real-time identification and pinpointing of *** automatically learn to extract hierarchical features from raw image data,capturing patterns such as edges,textures,and complex structures that are crucial for identifying lung ***8 incorporates multiscale feature extraction,enabling the detection of tumors of varying sizes and scales within a single *** is particularly beneficial for identifying small or irregularly shaped tumors that may be challenging to ***,through the utilization of cutting-edge data augmentation methods,such as Deep Convolutional Generative Adversarial Networks(DCGAN),the suggested approach can handle the issue of limited data and boost the models’ability to learn from diverse and comprehensive *** combined method not only improved accuracy and localization but also ensured efficient real-time processing,which is crucial for practical clinical applicati

关键词： Lung cancer detection dual-model deep learning technique data augmentation CNN YOLOv8

Thermal effects on wear behavior of additively manufactured NiTi shape memory alloys

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Chinese Journal of Aeronautics 2025年第1期38卷 147-164页

作者： Xianghui HUANG Nan KANG Pei WANG mohamed EL MANSORi Arts et Metiers institute of Technology MSMPHESAM UniversitéChâlons-en-Champagne 51006France Henan Key Laboratory of High-Performance Carbon fiber Reinforced Composites Institute of Carbon Matrix CompositesHenan Academy of SciencesZhengzhou 450046China Texas A&M Engineering Experiment Station Institute for Manufacturing SystemsCollege StationTX 77843USA

NiTi alloys fabricated by laser powder bed fusion(LPBf)additive manufacturing technology not only address the compositional instability resulting from complex processes but also solve the challenges of difficult machining of intricate aerospace ***,there are very few reports on the wear behavior of LPBf-NiTi *** the present work,the effects of microstructure and thermal treatment,including heat treatment and frictional heat,on the wear behavior of LPBf-NiTi alloy and 100Cr6 ball were analyzed through a series of tribological experiments with different sliding *** the average sliding speed increases(0.079–0.216 m/s),the wear rate of the as-built and heat-treated samples tends to decrease in the range of 2.69×10^(-3)–0.97×10^(-3)mm^(3)/*** the heat-treated LPBf-NiTi alloy is 46%harder than the as-built alloy is,the latter has a higher toughness(505 MJ/m^(3))and greater transformation strain of SiM(0.097).This leads to a coupling effect of heat treatment and sliding speed on the wear *** addition,the wear track morphologies under different sliding speeds are asymmetric due to the 24% greater acceleration at the far end from the motor and the 2.15 mm deviation between the maximum speed position and the geometric center of the *** wear modes of the as-built and heat-treated samples included adhesive,abrasive and delamination ***,the wear morphologies and dominant wear modes change with the frictionally caused heat release induced by the sliding speed.

关键词： Additive manufacturing Laser powder bed fusion NiTi alloys Wear resistance Sliding speed

feature selection strategy optimization for lithium-ion battery state of health estimation under impedance uncertainties

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Journal of Energy Chemistry 2025年第2期101卷 87-98页

作者： Xinghao Du Jinhao Meng Yassine Amirat fei Gao mohamed Benbouzid UMR CNRS 6027 iRDL University of Brest School of Electrical Engineering Xi'an Jiaotong University LbiSEN ISEN Yncréa Ouest School of Energy and Computer Science University of Technology of Belfort-Montbeliard

Battery health evaluation and management are vital for the long-term reliability and optimal performance of lithium-ion batteries in electric *** impedance spectroscopy(EiS) offers valuable insights into battery degradation analysis and ***,previous studies have not adequately addressed the impedance uncertainties,particularly during battery operating conditions,which can substantially impact the robustness and accuracy of state of health(SOH) *** by this,this paper proposes a comprehensive feature optimization scheme that integrates impedance validity assessment with correlation *** utilizing metrics such as impedance residuals and correlation coefficients,the proposed method effectively filters out invalid and insignificant impedance data,thereby enhancing the reliability of the input ***,the extreme gradient boosting(XGBoost) modeling framework is constructed for estimating the battery degradation *** XGBoost model incorporates a diverse range of hyperparameters,optimized by a genetic algorithm to improve its adaptability and generalization *** validation confirms the effectiveness of the proposed feature optimization scheme,demonstrating the superior estimation performance of the proposed method in comparison with four baseline techniques.

关键词： Lithium-ion battery State of health Electrochemical impedance spectroscopy Extreme gradient boosting

Effects of rare-earth Pr3+-Dy3+ doping on structural,magnetic,optical and dielectric properties of Zn2Y hexaferrite

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Journal of Rare Earths 2025年第2期43卷 329-336页

作者： ibrahim Mohammed mohamed E.El Sayed Ali Shawabkeh Mohammad N.Murshed ibtehaj f.Alshdoukhi Zeinhom M.El-Bahy J.Mohammed A.K.Srivastava Department of Physics Lovely Professional University Department of Science Technology Waziri Umaru Federal Polytechnic Birnin Kebbi Physics Department Faculty of Science and ArtsKing Khalid University College of Engineering and Technology American University of the Middle East Department of Basic Sciences College of Science and Health ProfessionsKing Saud Bin Abdulaziz University for Health ScienceKing Abdullah International Medical Research Center Department of Chemistry Faculty of ScienceAl-Azhar University Department of Physics Faculty of ScienceFederal University Dutse

This study was conducted to investigate the properties of Pr3+-Dy3+doped Zn2Y-type hexaferrite for potential technological applications.X-ray diffraction（XRD）,fourier transform infrared spectroscopy（fTiR） and field-emission scanning electron microscopy（fESEM） were used to analyze structural *** crystallite size in the synthesized samples varies between 57.54 and 68.57 *** vibrational bands at 400 and 600 cm-1,common to all hexaferrites,were confirmed through *** fESEM analysis reveals an agglomeration of magnetic grains and a decrease in the average grain size from 1.24 to1.06 μ*** M-H loops show that,with x values of 0.0,0.1,and 0.2,the saturation magnetization is determined to be 34.76,34.23,and 32.52 emu/g,*** corresponding coercivity values are21.24,30.39,and 33.99 ***-visible spectroscopy using Tauc theory reveals an increase in the optical band gap from 2.32 to 2.50 eV,indicating a tunable energy band structure by incorporating Pr3+-Dy3+*** dielectric constant increases,whereas AC conductivity decreases with increased Pr3+-Dy3+*** obtained results suggest the potential suitability of these materials for various technological applications.

关键词： Dielectric constant Magnetic hysteresis Optical band gap Pr3+-Dy3+ Rare earths Zn2Y-type hexaferrite

Effects of P301L-TAU on post-translational modifications of microtubules in human iPSC-derived cortical neurons and TAU transgenic mice

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Neural Regeneration Research 2025年第8期20卷 2348-2360页

作者： mohamed Aghyad Al Kabbani Christoph Köhler Hans Zempel institute of Human Genetics Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany Center for Molecular Medicine Cologne(CMMC) University of CologneCologneGermany Center Anatomy Department ⅡMedical FacultyUniversity of CologneCologneGermany

TAU is a microtubule-associated protein that promotes microtubule assembly and stability in the *** is missorted and aggregated in an array of diseases known as *** are essential for neuronal function and regulated via a complex set of post-translational modifications,changes of which affect microtubule stability and dynamics,microtubule interaction with other proteins and cellular structures,and mediate recruitment of microtubule-severing *** impairment of microtubule dynamics causes neuronal dysfunction,we hypothesize cognitive impairment in human disease to be impacted by impairment of microtubule *** therefore aimed to study the effects of a disease-causing mutation of TAU(P301L)on the levels and localization of microtubule post-translational modifications indicative of microtubule stability and dynamics,to assess whether P301L-TAU causes stability-changing modifications to *** investigate TAU localization,phosphorylation,and effects on tubulin post-translational modifications,we expressed wild-type or P301L-TAU in human MAPT-KO induced pluripotent stem cell-derived neurons(i Neurons)and studied TAU in neurons in the hippocampus of mice transgenic for human P301L-TAU(p R5 mice).Human neurons expressing the longest TAU isoform(2N4R)with the P301L mutation showed increased TAU phosphorylation at the AT8,but not the p-Ser-262 epitope,and increased polyglutamylation and acetylation of microtubules compared with endogenous TAU-expressing neurons.P301L-TAU showed pronounced somatodendritic presence,but also successful axonal enrichment and a similar axodendritic distribution comparable to exogenously expressed 2N4R-wildtype-TAU.P301L-TAU-expressing hippocampal neurons in transgenic mice showed prominent missorting and tauopathy-typical AT8-phosphorylation of TAU and increased polyglutamylation,but reduced acetylation,of microtubules compared with non-transgenic *** sum,P301L-TAU results in changes in micr

关键词： human induced pluripotent stem cell microtubules P301L pR5 mice TAU tauopathy tubulin code

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A Greener future: Carbon Nanomaterials from Lignocellulose

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Journal of Renewable Materials 2025年第1期13卷 21-47页

作者： Hebat-Allah S.Tohamy mohamed El-Sakhawy Samir Kamel Cellulose and Paper Department National Research CentreDokkiGiza12622Egypt

Lignocellulosic materials(LCMs),abundant biomass residues,pose signiﬁcant environmental challenges when improperly disposed ***,such as sugarcane bagasse,rice straw,saw dust and agricultural residues,are abun-dant but often burned,contributing to air pollution and greenhouse gas *** review explores the potential of transforming these materials into high-value carbon nanomaterials(CNMs).We explore the potential of transforming these materials into high-value *** employing techniques like carbonization and activa-tion,LCMs can be converted into various CNMs,including carbon nanotubes(CNTs),graphene(G),graphene oxide(GO),carbon quantum dots(CQDs),nanodiamonds(NDs),fullerenes(f),carbon nanoﬁbers(CNfs),and *** different carbon allotropes further enhances their *** derived from cellulose,lignin,and hemicellulose exhibit promising applications in diverseﬁ*** instance,CNTs can be used in energy storage devices like batteries and supercapacitors due to their exceptional electrical conductivity and mechanical ***,CNTs can be incorporated into recycled paper as aﬁre retardant additive,enhancing itsﬂame resistance.G,renowned for its high surface area and excellent electrical conductivity,ﬁnds applications in electronics,sensors,catalysis,and water treatment,where it can be used to adsorb heavy metal ***,owing to their unique optical properties,are used in bioimaging,drug delivery,and optoelectronic *** harnessing the potential of LCMs,we can not only mitigate environmental concerns but also contri-bute to a sustainable *** research is essential to optimize synthesis methods,explore novel applica-tions,and unlock the full potential of these versatile materials.

关键词： Lignocellulosic materials carbon-based nanomaterials carbon allotropes

A Plastic Surgery Mission: Personal Experience in improving Outcomes

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Modern Plastic Surgery 2025年第1期15卷 32-43页

作者： mohamed Elsayed mohamed mohamed Plastic Surgery Department Ahmed Maher Teaching Hospital Cairo Egypt

Background: Missions organized by international societies and humanitarian organizations play a significant role in saving many patients’ lives and improving their quality of life, despite the surrounding frustrating conditions. Methods: A team of plastic surgery volunteers was sent to Yemen by the KSHARC. Results: A successful mission was performed on 62 patients who underwent surgery, with more than 900 patients examined and receiving appropriate medications. Conclusion: Missions in disaster-affected areas are of great importance. The role of missions and humanitarian organizations should be empowered.

关键词： Missions Humanitarian Organizations Plastic Surgery Natural Disasters Wars

Steam Methane Reforming(SMR)Combined with Ship Based Carbon Capture(SBCC)for an Efficient Blue Hydrogen Production on Board Liquefied Natural Gas(LNG)Carriers

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fluid Dynamics & Materials Processing 2025年第1期21卷 71-85页

作者： ikram Belmehdi Boumedienne Beladjine mohamed Djermouni Amina Sabeur Mohammed El Ganaoui Laboratoire des Sciences et ingénierie Maritimes Facultéde Génie MécaniqueUniversitédes Sciences et de la Technologie d’Oran Mohammed BoudiafOran31000Algérie Laboratoire LERMAB iUT Henri Poincaréde Longwy Universitéde LorraineCosnes et RomainLongwy54400France

The objective of this study is to propose an optimal plant design for blue hydrogen production aboard a liquefiednatural gas(LNG)*** investigation focuses on integrating two distinct processes—steam methanereforming(SMR)and ship-based carbon capture(SBCC).The first refers to the common practice used to obtainhydrogen from methane(often derived from natural gas),where steam reacts with methane to produce hydrogenand carbon dioxide(CO_(2)).The second refers to capturing the CO_(2) generated during the SMR process on *** capturing and storing the carbon emissions,the process significantly reduces its environmental impact,making the hydrogen production“blue,”as opposed to“grey”(which involves CO_(2) emissions without capture).for the SMR process,the analysis reveals that increasing the reformer temperature enhances both the processperformance and CO_(2) ***,a higher steam-to-carbon(s/c)ratio reduces hydrogen yield,therebydecreasing thermal *** study also shows that preheating the air and boil-off gas(BOG)before theyenter the combustion chamber boosts overall efficiency and curtails CO_(2) *** the SBCC process,puremonoethanolamine(MEA)is employed to capture the CO_(2) generated by the exhaust gases from the SMR *** results indicate that with a 90%CO_(2) capture rate,the associated heat consumption amounts to 4.6 MJ perkilogram of CO_(2) *** combined approach offers a viable pathway to produce blue hydrogen on LNGcarriers while significantly reducing the carbon footprint.

关键词： Carbon dioxide(CO_(2))emissions blue hydrogen boil-off gas(BOG) steam methane reforming(SMR) ship-based carbon capture(SBCC)

Effect of empowerment-based interventions on self-efficacy and selfcare capacity among patients with sickle cell disease:A randomized controlled trial

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international Journal of Nursing Sciences 2025年第1期12卷 42-50页

作者： Zohour ibrahim Rashwan Hasan Abdali Khalil Leena mohamed Khonji Gayathripriya Narayanan Marwan Kamal Altheeb Roseben Pradeep Rajeswari Krishnasamy Magda mohamed Bayoumi Pediatric Nursing Specialty Nursing DepartmentCollege of Health and Sport SciencesUniversity of BahrainZallaqKingdom of Bahrain Pediatric Nursing Department Faculty of NursingAlexandria UniversityEgypt Shaikh Jaber Al-Ahmed Al-Subah Health Centre Primary Health Care CentresBarbarKingdom of Bahrain Midwifery Specialty Nursing DepartmentCollege of Health and Sport SciencesUniversity of BahrainZallaqKingdom of Bahrain Nursing Department College of Health and Sport SciencesUniversity of BahrainZallaqKingdom of Bahrain Mental Health Nursing Speciality Nursing DepartmentCollege of Health and Sport SciencesUniversity of BahrainZallaqKingdom of Bahrain Medical-Surgical Nursing Specialty Nursing DepartmentCollege of Health and Sport SciencesUniversity of BahrainZallaqKingdom of Bahrain Medical-Surgical Nursing Department Faculty of NursingBeni-Suef UniversityEgypt

Objective:This study aimed to investigate the effect of empowerment-based interventions on selfefficacy and self-care capacity among adults with sickle cell disease(SCD).Methods:A randomized control trial was conducted[NCT06296654].A total of 76 patients were recruited by using a cluster sampling technique in the two health centers in Bahrain from february to May 2022 and randomly allocated to the intervention group(n=38)or control group(n=38).The intervention group received the empowerment-based intervention implemented through structured small-group discussion sessions,individualized consultations(5A model:assess,advise,agree,assist,and arrange),and follow-up sessions,while the control group received routine health *** Sickle Cell Self-Efficacy Scale(SCSES)and the Appraisal of the Self-Care Agency Scale-Revised(ASA-R)were measured at baseline and one month after the intervention among two groups of ***:A total of 68 patients completed the study(36 patients in the intervention group and 32 patients in the control group).After the intervention,the score of SCSES in the intervention group was 37.0(35.0,39.8)higher than the control group 28.0(25.2,32.0)(U=-6.121,Pf ASA-R in the intervention group was 61.0(58.3,65.0)higher than the control group 49.0(43.3,53.0)(U=-0.653,Pion:Adopting the empowerment-based intervention using the 5As model effectively improves self-efficacy and self-care capacity among patients with SCD.

关键词： Activities of daily living Sickle cell disease Self-efficacy Self-care