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Chinese Journal of Aeronautics 2020年第2期33卷 721-729页

作者： Xunzhong GUO Xuan CHENG Yong XU Jie TAO ali abd el-aty Hai LIU College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211100China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China Department of Precision Manufacturing Engineering Suzhou Vocational Institute of Industrial TechnologySuzhou 215104China

3D free bending process,an advanced metal forming technology,has attracted much attention due to its unique geometrical flexibility and *** tubes with materials may effectively reduce the distortion in the cross-section area and restrain wrinkling and collapse of tube *** the present study,the impacts of filling different materials on the copper tubes during 3D free bending process were *** have found that copper tubes filled with low melting point alloys could induce the most uniform stress distribution,which result in better formability and moderate thickness changing rates when compared to SS304 steel balls and PU *** lowest ellipticity reached to 1.467%.

关键词： 3D free bending ellipticity Filling bending Finite element modelling Force model Thickness

Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion

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Chinese Journal of Aeronautics 2023年第6期36卷 420-434页

作者： Shenghan HU Cheng CHENG ali abd el-aty Shuo ZHENG Xunzhong GUO Chunmei LIU Jie TAO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 21ll00China Department of Materials Science and Engineering&RIAM Seoul National UniversityI-Gwanak-roGwanakguSeoul 08826Republic of Korea Mechanical Engineering Department Faculty of Engineering-HelwanHelwan UniversityCairo 11795Egypt

In three and six-axis free-bending equipment,the deformation zone length(A)is a fixed mechanical structure parameter modified when the relevant structure is redesigned and *** this study,a six degree of freedom(6-DOF)parallel mechanism was used as the control mechanism of the bending die,and a new method of changing the deformation zone length(A)was ***,an idealized geometric model of free bending-based active motion was ***,the influence of the deformation zone length(A)on the bending moment and the bending radius of the tube was *** addition,the finite element simulation and a kinematic model of free bending-based active motion controlled by the 6-DOF parallel mechanism were established,and bending processes of the SS304 tube with different deformation zone lengths were ***,the impact of the deformation zone length(A)on the bending radius,bending moment,wall thickness,and motion of the parallel mechanism were ***,experiments were carried out on the free-bending equipment based on the 6-DOF parallel *** verified the rules in the theoretical analysis,finite element simulation,and kinematic simulation.

关键词： Bending radius Deformation zone length 6-DOF parallel mechanism Free bending-based active motion Small diameter tube

Impact of bending dies with different friction forms on forming force and quality of tubes manufactured by free bending technology

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Chinese Journal of Aeronautics 2021年第4期34卷 253-264页

作者： Hao CHEN Hui WANG ali abd el-aty Yao QIN Jiang LI Yong ZHANG Tao LI Xunzhong GUO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China College of Mechanical and electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211100China Mechanical Engineering Department Faculty of Engineering-HelwanHelwan UniversityCairoEgypt Nanjing Golden Dragon Bus Co. LtdNanjing 210012China

In the 3 D free bending forming system,the bending die can be designed either in a sliding type or rolling friction *** die-based sliding friction type is often called normal bending dies;however,the bending dies-based rolling friction type includes bending die-based roller type and ball type in *** the current study,the impact of three bending dies on the forming force,and the bent tube quality was *** obtained results showed that the tangential stresses and strains of the tubes formed by the bending die-based roller type were the smallest among the three bending ***,the spherical bearing force PUwas reduced drastically after using the roller type and ball type compared to the sliding friction ***,the uniformity of the wall thickness distribution of the tubes formed by the roller type and ball type was better than those obtained from the sliding friction *** addition,the cross-section distortion rate was reduced by 2.8%using the roller type,and 1.8%using ball-type compared to the sliding friction type.

关键词： Bending die Cross-section distortion Rolling friction Sliding friction Spherical bearing force Wall thickness

Effects of punch size, magnetic field, and magnetorheological elastomers medium on forming T-shaped thin-walled Inconel 718 tubes

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Chinese Journal of Aeronautics 2022年第1期35卷 226-237页

作者： Qiucheng YANG Cheng CHENG ali abd el-aty Chunmei LIU Shenghan HU Yao QIN Tao LI Cong WU Yong XU Xunzhong GUO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Jiangsu Key Laboratory of Advanced Structural Materials and Application Nanjing 211100China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

This study aims at investigating the impact of using the Magnetorheological elastomers(MREs)medium to improve the formability of T-shaped Inconel 718 tubes during the bulging ***,the influence of the punch size and the intensity of the magnetic field on the branch height and wall thickness distribution of the T-shaped Inconel 718 tubes are also *** results showed that the parts formed by the punch with a length of 5 mm in the pressurization zone have better forming *** external magnetic field can promote a high branch,and by increasing the intensity of the magnetic field,the branch height was increased and then *** the same time,the magnetic field reduced the amount of material accumulation between the guiding zone and the bulging ***,it promotes the material in the guiding zone to enter the bulging zone and improve the bulging ability of the T-shaped tube.

关键词： Magnetic field strength Magnetorheological elastomers(MREs) Pressurization zone T-shaped tube Wall thickness distribution

Investigate the Effect of the Magnetic Field on the Mechanical Properties of Silicone Rubber-Based Anisotropic Magnetorheological elastomer during Curing Process

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Journal of Renewable Materials 2020年第11期8卷 1411-1427页

作者： Tao Li ali abd el-aty Cheng Cheng Yizhou Shen Cong Wu Qiucheng Yang Shenghan Hu Yong Xu Jie Tao Xunzhong Guo College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing211100China Jiangsu Key Laboratory of Advanced Structural Materials and Application Nanjing211100China Institute of Metal Research Chinese Academy of SciencesShenyang110016China Mechanical Engineering Department Faculty of Engineering-HelwanHelwan UniversityCairoEgypt

In this investigation,a new silicone rubber-based MRE material was prepared to be used as a forming medium in manufacturing thin-walled complexshaped Ni-based tubes through the bulging ***,it is significant to investigate the effect of magnetic field intensity,magnetic field loading time,and angle on the mechanical properties of the prepared MRE material during the curing *** obtained results showed that increasing the magnetic field intensity during the curing process can improve the orientation of the chain structure in the elastomer matrix ***,its mechanical properties are the best under the corresponding magnetic field intensity of 321 ***,by extending the magnetic field loading time in the curing process,the orientation of the chain structure was optimized,at the same time,the mechanical properties were also improved,and the best loading time is about 20–25 *** changing the loading angle of the magnetic field during the curing process,the mechanical properties of the MRE were *** the loading angle of the magnetic field is 90°,the elastomer showed the best compression mechanical properties and excellent compression ***,for the anisotropic MRE material,the performance with magnetic compression is always better than that without magnetic compression.

关键词： Magnetorheological elastomer(MRE) magnetic field curing process compression mechanical properties chain structure

Pyronaridine combined with diminazene aceturate inhibits Babesia in vitro and in vivo

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Asian Pacific Journal of Tropical Biomedicine 2024年第3期14卷 93-99页

作者： Shimaa abd el-Salam el-Sayed Mohamed Z.Sayed-Ahmed Shaimaa Ahmed Awad ali Nourah Alsadaan Nawazish Alam Mahmoud S.Alkhoudary Ikuo Igarashi Mohamed abdo Rizk National Research Center for Protozoan Diseases Obihiro University of Agriculture and Veterinary MedicineInada-ChoObihiroHokkaido 080-8555Japan Department of Biochemistry and Chemistry of Nutrition Faculty of Veterinary MedicineMansoura UniversityMansoura 35516Egypt Department of Clinical Pharmacy College of PharmacyJazan UniversityJazan 45142Saudi Arabia Medical-Surgical Department College of NursingJouf UniversitySakaka 72388Saudi Arabia Critical Care and Emergency Nursing Faculty of NursingMansoura UniversityEgypt College of Nursing Jouf UniversitySakaka 72388Saudi Arabia Faculty of Pharmacy Mansoura UniversityMansoura 35516DakahliaEgypt Department of Internal Medicine and Infectious Diseases Faculty of Veterinary MedicineMansoura UniversityMansoura 35516Egypt

Objective:To evaluate the combination therapy of pyronaridine tetraphosphate and diminazene aceturate against Babesia in vitro and in ***:Bioinformatic analysis was performed using atom pair *** in vitro combination test was performed against Babesia bovis and Theileria ***,the in vivo chemotherapeutic efficacy of pyronaridine tetraphosphate in combination with diminazene aceturate was investigated against the growth of Babesia microti in mice using a fluorescence inhibitory ***:Pyronaridine tetraphosphate and diminazene aceturate exhibited nearly similar molecular *** in vitro combination of pyronaridine tetraphosphate and diminazene aceturate was synergistic on Babesia bovis and additive on Theileria *** addition,5 mg/kg pyronaridine tetraphosphate combined with 10 mg/kg diminazene aceturate inhibited Babesia microti growth significantly compared with those observed after treatment with 25 mg/kg diminazene aceturate alone from day 6 post treatment to day 12 post *** combination therapy also normalized the hematological parameters of infected ***:An oral dose of pyronaridine tetraphosphate combined with a subcutaneous dose of diminazene aceturate inhibits Babesia in vitro and in mice,suggesting it might be a new paradigm for the treatment of babesiosis.

关键词： Babesia Pyronaridine tetraphosphate Diminazene aceturate Babesiosis Theileria

Correlation between Wnt Signalling Inhibitors (Dickkopf-1 & Sclerostin) and the Intimal Medial Thickness in Children on Maintenance Hemodialysis

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Open Journal of Nephrology 2024年第3期14卷 397-412页

作者： Manal abd el-Salam Mohamed Hamdi ali Nadia Youssef Riad Rasha abd el Samad Fawaz Shima Mohamed Department of Pediatrics Faculty of Medicine (for Girls) Al-Azhar University Cairo Egypt Tbilisi State Medical University Tbilisi Georgia Department of Clinical Pathology National Heart Institute Cairo Egypt Department of Radiology Faculty of Medicine (for Girls) Al-Azhar University Cairo Egypt

Background: Wnt signalling inhibitors (Dickkopf-1 and Sclerostin) signalling play a role in vascular development and may contribute to calcification. Aim: To investigate the association between Dickkopf-1 and sclerostin serum concentrations in children undergoing maintenance hemodialysis with intimal medial thickness and peak systolic velocity of the main arteries. Patients and Methods: A study was conducted on 40 children undergoing maintenance hemodialysis and controls of the same age and sex. The study measured the initial medial thickness (IMT) and peak systolic velocity (PSV) of the main vessels (carotid, ulnar, and femoral). Dickkopf-1 and sclerostin serum levels in both groups were assessed, and a routine investigation was performed. Results: The findings indicate that the levels of serum Dickkopf-1 and Sclerostin were significantly higher in the hemodialysis group 2540.65 (2215.4 - 2909.2 pg/ml) and 1.17 (0.85 - 2.03 ng/ml)respectively (P = 0.001), compared to their control group it was 1110.45 (885.45 - 1527.65 pg/ml) and 0.28 (0.25 - 0.32 ng/ml)) respectively P = 0.001. Additionally, there was a significant increase in intima-media thickness (IMT) with a decrease in peak systolic velocity (PSV) in the main blood vessels, including the carotid, ulnar, and femoral arteries. A significant correlation was also observed between Dickkopf-1 and sclerostin levels and IMT of the carotid, ulnar, and femoral arteries. Conclusion: Wnt signalling inhibitors (Dickkopf-1 and Sclerostin) exert effects beyond the bone and significantly contribute to early vascular calcification in pediatric patients undergoing maintenance hemodialysis.

关键词： Wnt Signalling Vascular Calcification Hemodialysis Children

Disruption of sleep patterns among secondary school adolescents

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Journal of Integrative Nursing 2024年第3期6卷 145-149页

作者： Zeki Sabah MUSIHB Hasan Saud abdul HUSSEIN Alaa Mahdi abd ali Department of Pediatric Nursing College of NursingUniversity of KerbalaKerbalaIraq

Objectives:This study aims to assess sleep disorders among secondary school adolescents and explore the relationship between sociodemographic factors(age,gender,household income,and sleep duration)and the occurrence of these ***:A quantitative,descriptive,cross-sectional study,was conducted from November 20th,2022,to May 25th,2023,involving 200 secondary school students selected through convenience *** collection utilized a structured questionnaire divided into sociodemographic and sleep disorder *** was ensured by a panel of ten experts,and reliability was confirmed using Cronbach’s Alpha(0.77).Statistical analysis employed SPSS version ***:Findings revealed that a majority of participants(70.5%)had low-level sleep disorders,followed by moderate disorders represented(29%).Significant associations were found between sleep disorders and gender(P=0.000),economic status for family(P=0.020),and nightly sleep duration(P=0.016).However,no significant relationship was observed between sleep disorders and family structure or age(P>0.05).Conclusions:The study highlights that most secondary school students experience mild sleep disorders,followed by moderate ***,gender,income,and sleep duration showed significant correlations with sleep disorders.

关键词： Disruption of sleep secondary school adolescents sleep patterns

Response of seed yield and fatty acid compositions for some sunflower genotypes to plant spacing and nitrogen fertilization

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Information Processing in Agriculture 2017年第3期4卷 241-252页

作者： Mohamed ali abd el-Satar Asmaa abd-el-Halime Ahmed Tamer Hassan ali Hassan Oil Crops Research Department Field Crops Research InstituteAgricultural Research Center9 El-Gamaa St.GizaEgypt

A field experiment was conducted at the experiment Farm of Kafr-el-Hamam Research Station,Zagazig,Sharkia Governorate,Agricultural Research Center,Egypt during the two successive summer seasons of 2015 and 2016 to achieve the highest yield and good oil quality of three tested sunflower *** both seasons,the experiment was conducted using the split split plot design in randomized complete block design with three replicates arrangement keeping plant spaces(15,20 and 25 cm apart between hills)in main plots,nitrogen fertilization levels(15,30 and 45 N fad.^-1)in sub plots and sunflower genotypes(Giza 102,Sakha 53 and promising line of L120)in sub sub *** and quality traits were significantly influenced by plant spaces,nitrogen fertilization levels and genotypes as well as interactions in both seasons and their combined *** wider plant spacing of 25 cm seems to be a good compromise between the highest seed yield fad.^-1 and good acid composition of *** increasing of nitrogen fertilization level had a positive reflected on yield and desirable acid composition of *** 53 was ranked in the first order in stem diameter,head diameter,100-seed weight,seed weight plant^-1,flowered late and hence seed yield fad.^-1 as well as seed oil content whereas,Giza 102 characterized with its contained the highest proportion of oleic and linoleic unsaturated fatty *** highest values of head diameter,100-seed weight,seed weight plant^-1 and hence seed yield fad.^-1 as well as the highest proportion of oleic and linoleic unsaturated fatty acids composition were obtained by grown sunflower *** 53 at wider spacing of 25 cm with application of nitrogen fertilization levels of 45 N fad.^-*** and path analyses revealed that 100-seed weight and head diameter had the highest direct and indirect influence on seed weight plant1,at the same time also,oleic acid content and linoleic acid content had the highest direct and indirect effect inf

关键词： Sunflower Plant spacing Nitrogen fertilization Genotypes Seed yield Fatty acids

Mathematical Morphology View of Topological Rough Sets and Its Applications

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Computers, Materials & Continua 2023年第3期74卷 6893-6908页

作者： Ibrahim Noaman abd el Fattah el Atik Tamer Medhat Manal E.ali Department of Mathematics Faculty of Science and Arts in Al-MandaqAl-Baha UniversityKingdom of Saudi Arabia Department of Mathematics Faculty of ScienceTanta UniversityTantaEgypt Department of electrical Engineering Faculty of EngineeringKafrelsheikh UniversityKafrelsheikh33516Egypt Department of Physics and Engineering Mathematics Faculty of EngineeringKafrelsheikh UniversityKafrelsheikh33516Egypt

This article focuses on the relationship between mathematical morphology operations and rough sets,mainly based on the context of image retrieval and the basic image correspondence *** morphological procedures and set approximations in rough set theory have some clear *** initiatives have been made to connect rough sets with mathematical *** significant publications have been written in this *** attempt to show a direct connection between mathematical morphology and rough sets through relations,a pair of dual operations,and neighborhood *** sets are used to suggest a strategy to approximatemathematicalmorphology within the general paradigm of soft computing.A single framework is defined using a different technique that incorporates the key ideas of both rough sets and mathematical *** paper examines rough set theory from the viewpoint of mathematical morphology to derive rough forms of themorphological structures of dilation,erosion,opening,and *** newly defined structures are applied to develop algorithm for the differential analysis of chest X-ray images from a COVID-19 patient with acute pneumonia and a health *** algorithm and rough morphological operations show promise for the delineation of lung occlusion in COVID-19 patients from chest *** foundations of mathematical morphology are covered in this *** that,rough set theory ideas are taken into account,and their connections are ***,a suggested image retrieval application of the concepts from these two fields is provided.

关键词： Mathematical morphology rough set theory topological spaces COVID-19