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Characteristic properties of date-palm fibre/sheep wool reinforced polyester composites

Journal of Bioresources and Bioproducts 2023年第4期8卷 430-443页

作者： Mohammed Y.Abdellah mustafa gamal sadek Hamzah Alharthi G.T.Abdel-Jaber Ahmed H.Backar Mechanical Engineering Department Faculty of EngineeringSouth Valley UniversityQena83523Egypt Mechanical Engineering Department College of Engineering and Islamic ArchitectureUmm AL-Qura UniversityMakkah21955Saudi Arabia New Assiut Technological University(NAUT) Assiut71684Egypt Production Engineering Department Faculty of EngineeringAlexandria UniversityAlexandria21544Egypt

In this study,we attempted to characterise the effects of date-palm fibre(DPF)and a date-palm fibre/sheep wool hybrid in polyester to enhance high-performance and low-cost composite materials that can be used in insulation building systems,automotive parts,and home *** DPF was treated using 5%NaOH solution;and the sheep wool was cleaned with 50℃hot water and *** composite specimens were prepared with different fibre contents(0%,10%,20%,30%(w))using a compression moulding *** effect of fibre reinforcement was analysed in terms of the mechanical properties(tensile,flexural,impact,and hardness)and composite ***,scanning electron microscopy(SEM)was performed on the fibres before and after treatment,and the fractured surfaces of all composite specimens were examined after tensile *** results showed that the 20%DPF/sheep wool hybrid reinforced polyester produced the best *** ultimate tensile strength and modulus were 27 MPa and 3.69GPa,*** ultimate flexural strength and flexural modulus were 35.4 and 2507 MPa,*** impact strength was 39.5 kJ/m^(2)and the hardness was 64 *** density decreased to the lowest value of 1.02 g/cm^(3)with the 30%DPF/sheep wool *** SEM showed good adhesion and interfacial bonding between DPF/sheep wool hybrid fibres and the polyester matrix,particularly at 20%fibre content.

关键词： Date-palm fibre Polyester Compression moulding Mechanical property

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Few-Shot Learning for Discovering Anomalous Behaviors in Edge Networks

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Computers, Materials & Continua 2021年第11期69卷 1823-1837页

作者： Merna gamal Hala M.Abbas Nour Moustafa Elena Sitnikova Rowayda A.sadek Department of Information Technology Helwan UniversityCairoEgypt Department of Computer Science Helwan UniversityCairoEgypt School of Engineering and Information Technology University of New South Wales at ADFACanberraAustralia

Intrusion Detection Systems(IDSs)have a great interest these days to discover complex attack events and protect the critical infrastructures of the Internet of Things(IoT)*** IDSs based on shallow and deep network architectures demand high computational resources and high volumes of data to establish an adaptive detection engine that discovers new families of attacks from the edge of IoT ***,attackers exploit network gateways at the edge using new attacking scenarios(i.e.,zero-day attacks),such as ransomware and Distributed Denial of Service(DDoS)*** paper proposes new IDS based on Few-Shot Deep Learning,named CNN-IDS,which can automatically identify zero-day attacks from the edge of a network and protect its IoT *** proposed system comprises two-methodological stages:1)a filtered Information Gain method is to select the most useful features from network data,and 2)one-dimensional Convolutional Neural Network(CNN)algorithm is to recognize new attack types from a network’s *** proposed model is trained and validated using two datasets of the UNSW-NB15 and *** experimental results showed that it enhances about a 3%detection rate and around a 3%–4%falsepositive rate with the UNSW-NB15 dataset and about an 8%detection rate using the BoT-IoT dataset.

关键词： Convolution neural network information gain few-shot learning IoT edge computing

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Phytochemical Constituents and Allelopathic Effects of Some Medicinal Plants Extract on the Soil Algal Diversity

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Journal of Agricultural Science and Technology(A) 2013年第12期3卷 1000-1009页

作者： mustafa Ahmed Fawzy AwatiefFahmey Hifney Ahmed Abdel-Salam Issa gamal Gareib Botany & Microbiology Department Faculty of Science Assiut University Assiut 71516 Egypt

Phytochemical constituents of the shoots and roots extract of chosen eight medicinal plants （Plantago major, Verbesina encelioides, Glinus lotoides, Helotropium supinum, Mentha microphylla, Euphorbia hirta, Juncus subulatus and Convolvulus arvensis） were estimated using standard qualitative analysis. The extract contained alkaloids, glycosides, saponins, phenols, tannins, f[avonoids and terpenoids in some medicinal plants while others contain some only of these phytochemical components. Allelopathic effect of the various concentrations of the extracts on the soil algal diversity was also investigated. Wollea saccata was the only algal species disappeared from all applied investigated plant extracts. Phormidium richardsii, Monoraphidium braunii, Eunotia verneris and Nitzschia bilobata were the highly sensitive algal species to all applied shoot and root extract from all tested plants, they disappeared from most of the studied plants. On the other hand, Phormidium animale and Chlorella neustonice were highly tolerant algal species to all applied extracts. Counts of Cyanophyceae, Chlorophyceae and Bacillariophyceae were decreased by addition of some investigated medicinal plants extracts such as Juncus subulatus, Convolvulus arvensis and Euphorbia hirta. So the authors can use these plants extracts in biocontrol of the nuisance of algal bloom or any other microorganisms. Also, these plants may be useful to recover eutrophic water which needs further investigation.

关键词： Allelopathy allelochemicals Plantago major Verbesina encelioides Glinus lotoides Phormidium richardsii,Monoraphidium braunii.

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Epidemiological Aspects of Intrafamilial Spread of HCV Infection in Egyptian Population: A Pilot Study

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Open Journal of Gastroenterology 2014年第5期4卷 228-236页

作者： Mahmoud El-Bendary gamal Esmat mustafa Neamatallah Emily Kamel Tarek Besheer Hatem Elalfy Maged El-Setouhy Dalia Omran Department of Community Environmental and Occupational Medicine Ain-Shams Faculty of Medicine Ain-Shams University Cairo Egypt Medical Biochemistry Department Mansoura Faculty of Medicine Mansoura University Mansoura Egypt Public Health & Preventive Medicine Department Mansoura Faculty of Medicine Mansoura University Mansoura Egypt Tropical Medicine & Hepatology Department Cairo Faculty of Medicine Cairo University Giza Egypt Tropical Medicine & Hepatology Department Mansoura Faculty of Medicine Mansoura University Mansoura Egypt

Aim: Liver disease is a leading cause of morbidity and mortality among Egyptians. The major cause is infection with HCV, with 70 000 up to 140 000 newly reported cases annually. The objectives of this study were to determine the prevalence of anti-HCV antibodies among household contacts of HCV index cases and to identify the possible risk factors of transmission of HCV among Egyptian families. Material and Methods: The present external pilot study (double centre study) was performed on a convenient sample of 125 index cases and their 321 household family contacts recruited from Mansoura & Cairo University where 2 questionnaires were used to collect data from the index & their related contacts. The all were exposed to clinical examinations, routine laboratory testing & screening for the prevalence of Anti-HCV antibodies. Results: The prevalence of anti-HCV seropositivity among household contacts of index cases was found to be 13.7% which husbands of female index cases ranked first followed by wives of male index cases (36.36% versus 17.86% respectively,

关键词： HCV Intrafamilial Transmission Epidemiology

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