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Privacy-preserved learning from non-i.i.d data in fog-assisted IoT:A federated learning approach

Digital Communications and Networks 2024年第2期10卷 404-415页

作者： mohamed Abdel-Basset Hossam Hawash Nour Moustafa Imran Razzak mohamed Abd Elfattah Faculty of Computers and Informatics Zagazig UniversityZagazigSharqiyah44519Egypt School of Engineering and Information Technology University of New South Wales@ADFACanberraACT2600Australia Deakin University Geelong Waurn Ponds CampusAustralia Computer Science Department Misr Higher Institute for Commerce and ComputersMansoura35511Egypt

With the prevalence of the Internet of Things(IoT)systems,smart cities comprise complex networks,including sensors,actuators,appliances,and cyber *** complexity and heterogeneity of smart cities have become vulnerable to sophisticated cyber-attacks,especially privacy-related attacks such as inference and data poisoning *** Learning(FL)has been regarded as a hopeful method to enable distributed learning with privacypreserved intelligence in IoT *** though the significance of developing privacy-preserving FL has drawn as a great research interest,the current research only concentrates on FL with independent identically distributed(i.i.d)data and few studies have addressed the non-i.i.d *** is known to be vulnerable to Generative Adversarial Network(GAN)attacks,where an adversary can presume to act as a contributor participating in the training process to acquire the private data of other *** paper proposes an innovative Privacy Protection-based Federated Deep Learning(PP-FDL)framework,which accomplishes data protection against privacy-related GAN attacks,along with high classification rates from non-i.i.d ***-FDL is designed to enable fog nodes to cooperate to train the FDL model in a way that ensures contributors have no access to the data of each other,where class probabilities are protected utilizing a private identifier generated for each *** PP-FDL framework is evaluated for image classification using simple convolutional networks which are trained using MNIST and CIFAR-10 *** empirical results have revealed that PF-DFL can achieve data protection and the framework outperforms the other three state-of-the-art models with 3%–8%as accuracy improvements.

关键词： Privacy preservation Federated learning Deep learning Fog computing Smart cities

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Harmful effects of pyrethroid ester insecticide on the male reproductive system mainly through affecting testicular function and inflammatory markers

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BIOCELL 2020年第1期44卷 111-115页

作者： Ha ABDEL maKSOUD Mk maHFOUZ Mi SOLImaN mohamed G ELHARRIF M ABBASS ma EL-BADRY Department of Biochemistry Benha UniversityBenhaEgypt Department of Basic Medical Sciences Shaqra UniversityShaqraaSaudi Arabia

Pyrethroid esters are widely used as insecticides worldwide. In this study, we aimed to evaluate the harmful effect of deltamethrin on the male reproductive system through the assessment of reproductive hormones, inflammatorymarkers, and testicular function. To achieve our aim, eighty male 7-9-week-old, Wistar rats were taken, weighed, and divided into four experimental groups. The first group was kept as a control group, and the other three groups were given deltamethrin orally at different concentrations (0.87, 8.7, and 17.4 mg/kg body weight) for nine weeks. The resultsindicated that deltamethrin administration associated with a significant decrease in reproductive hormones, especially FSH, LH, and significant elevation in the interleukin 2 (IL2), interleukin 6 (IL6), histamine, and cortisol levels. Also, thesignificance of inhibition of sperm motility and viability, decreased testis weights, sperm count, and fructose in semen were noted. These findings clarify the harmful effect of deltamethrin on the male reproductive system by producing a significant alteration in reproductive hormones, inflammatory markers as well as testicular function.

关键词： Deltamethrin Reproductive hormones Inflammatory markers

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On the Gosper’s q-constant Ⅱ_q

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Acta mathematica Sinica,English Series 2018年第11期34卷 1755-1764页

作者： mohamed EL BACHRAOUI Department mathematical Sciences UAE University

Gosper introduced the functions sinq z and cosq z as q-analogues for the trigonometric functions sin z and cos z respectively. He stated a variety of identities involving these two q-trigonometric functions along with certain constants denoted by Πqn （n ∈ N）. Gosper noticed that all his formulas on these constants have more than two of the Πqn. So, it is natural to raise the question of establishing identities involving only two of the Πqn. In this paper, our main goal is to give examples of such formulas in only two Πqn.

关键词： q-trigonometric functions elliptic functions theta function identities

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Electrochemical Noise Analysis and Electrochemical Impedance Spectroscopy for Pure Copper in Chloride Media

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Chinese Journal of Chemistry 2006年第2期24卷 247-252页

作者： NAGIUB Adham mohamed Faculty of Science Al-Azhar University Assiut 71524 Egypt

The corrosion behavior of pure copper electrode exposed to artificial seawater has been studied using electrochemical noise analysis （ENA） and electrochemical impedance spectroscopy （EIS）. A diffusion process was observed for copper exposed to chloride media as indicated by the presence of a minimum phase angle over the lowest frequency range in the impedance plots. Analysis of electrochemical noise （EN） data has been collected both in time and frequency domains. Noise resistance Rn was obtained after analyzing EN data in the time domain. A good agreement was observed between Rn values and polarization resistance Rp values obtained from EIS analysis. Localization index Ii was not found to provide information concerning corrosion mechanisms. Also skewness and kurtosis for both potential and current fluctuations did not show any mechanistic information. It was concluded that ENA could detect the corrosion rate for copper exposed to chloride media, but was not found to provide information about the corrosion mechanisms.

关键词： impedance noise analysis copper chloride media

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Developing Check-Point Mechanism to Protect Mobile Agent Free-Roaming Against Untrusted Hosts

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Computers, materials & Continua 2022年第8期72卷 3849-3862页

作者： tarig mohamed Ahmed Department of Information Technology FCITKing Abdulaziz UniversityJeddahSaudi Arabia

Mobile Agent has many benefits over traditional distributed systems such as reducing latency,bandwidth,and *** Agent Systems are not fully utilized due to security *** paper focuses on mobile agent protection against malicious hosts.A new security mechanism called Checkpoints has been *** Mechanism(CPM)aims to protect Mobile Agent against malicious hosts in case of Capturing and Integrity *** assumes using a free-roaming mobility mechanism by Mobile agent *** main idea behind CPM is to generate multiple versions of Mobile *** multiple version is used to recover Mobile Agent from Capturing and Integrity attacks by untrusted *** versions are kept in Recovery Host(RH).RH plays a key role in CPM by controlling and monitoring mas’recovery processes.A prototype method has been used to prove the feasibility of *** p https://***/Default-305-ARrototype was implemented by using *** framework and C#.full discussion for several scenarios has been done to analyze the feasibility and performance for *** found from this research,CPM has a strong ability to protect Mobile Agents from Capturing and Integrity attacks *** addition,there is no negative impact on the overall performance of the mobile agent system.

关键词： Mobile agent security capturing integrity attacks

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Rising concentrations of polybrominated diphenyl ethers (PBDEs) in Nigerian foodstuffs despite global restrictions

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Emerging Contaminants 2024年第1期10卷 54-59页

作者： Yulong ma William A.Stubbings Reginald Cline-Cole mohamed Abou-Elwafa Abdallah Stuart Harrad School of Geography Earthand Environmental SciencesUniversity of BirminghamBirminghamB152TTUK Department of African Studies&Anthropology School of History and CulturesUniversity of BirminghamBirminghamB152TTUK

The presence of brominated flame retardants(BFRs)in foodstuffs of African origin is poorly *** fill this gap,animal-derived food samples comprising 13 different items originally from Nigeria were obtained in 2021,and concentrations of novel brominated flame retardants(NBFRs),polybrominated diphenyl ethers(PBDEs),and hexabromocyclododecane(HBCDD)were *** mean concentrations of NBFRs,PBDEs,and HBCDD in Nigerian foodstuffs were 2.1 ng/g(18 ng/g lipid weight(lw)),1.3 ng/g(9.2 ng/g lw),and 0.42 ng/g(2.8 ng/g lw),with median concentrations of 1.7 ng/g(14 ng/g lw),1.1 ng/g(8.2 ng/g lw),andtary studies reveals rising concentrations of PBDEs in Nigerian foodstuffs in recent years with associated rises in dietary exposure,possibly due to active domestic use of PBDEs in ***,comparison of our exposure estimates with health-based limit values suggests adverse health effects of dietary intake of BFRs by Nigerians are unlikely to occur.

关键词： BFRs Alternative flame retardants Dietary exposure Health risks Food

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A New BEM Modeling Algorithm for Size-Dependent Thermopiezoelectric Problems in Smart Nanostructures

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Computers, materials & Continua 2021年第10期69卷 931-944页

作者： mohamed Abdelsabour Fahmy Department of mathematics Jamoum University CollegeUmm Al-Qura UniversityAlshohdaa25371JamoumMakkahSaudi Arabia Department of Basic Sciences Faculty of Computers and InformaticsSuez Canal UniversityNew CampusIsmailia41522Egypt

The main objective of this paper is to introduce a new theory called size-dependent thermopiezoelectricity for smart *** proposed theory includes the combination of thermoelastic and piezoelectric influences which enable us to describe the deformation and mechanical behaviors of smart nanostructures subjected to thermal,and piezoelectric *** of difficulty of experimental research problems associated with the proposed ***,we propose a new boundary element method(BEM)formulation and algorithm for the solution of such problems,which involve temperatures,normal heat fluxes,displacements,couple-tractions,rotations,force-tractions,electric displacement,and normal electric displacement as primary variables within the BEM *** computational performance of the proposed methodology has been demonstrated by using the generalized modified shift-splitting(GMSS)iteration method to solve the linear systems resulting from the BEM *** advantages are investigated and compared with other iterative *** numerical results are depicted graphically to show the size-dependent effects of thermopiezoelectricity,thermoelasticity,piezoelectricity,and elasticity theories of *** numerical results also show the effects of the sizedependent and piezoelectric on the displacement *** validity,efficiency and accuracy of the proposed BEM formulation and algorithm have been *** findings of the current study contribute to the further development of technological and industrial applications of smart nanostructures.

关键词： Boundary element method size-dependent thermopiezoelectricity smart nanostructures

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Review of analytical methods for stress and deformation analysis of buried water pipes considering pipe-soil interaction

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Underground Space 2023年第6期13卷 205-227页

作者： Yingxu Huo Sherif Mohsen mohamed Hassan Gomaa tarek Zayed mohamed Meguid Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong 999077China Department of Building and Real Estate The Hong Kong Polytechnic UniversityHung HomHong Kong 999077China Structural Engineering Department Faculty of EngineeringMansoura UniversityMansoura 35516Egypt Department of Civil Engineering McGill UniversityMontrealQuebec H3A 0G4Canada

Buried water pipelines are vulnerable to fail or break due to excessive loading or ground *** evaluation of pipe performance and serviceability relies on the proper understanding of pipe-soil interactions(PSI).Analytical methods are important approaches to studying ***,a systematic and thorough literature review to analyze the existing research trends,technological achievements and future research opportunities is not *** work investigates analytical methods that analyze the stress and deformation of pipes in terms of cross-sectional,transverse and longitudinal PSI ***,scientometric analysis is performed to acquire relevant research works from online databases and analyze the existing data of influential authors,productive research sources and frequent key word occurrence in the fields of ***,a qualitative discussion is performed in the three categories of PSI:(1)cross-sectional,including ovalization and circumferential behaviours;(2)transverse,including seismic fault crossing,weak soil zones,ground settlement and pipe uplift;and(3)***,six research opportunities are discussed,including the role of friction in cross-sectional deformation,combined effects of bending and compression,choice of soil reaction models and calibration of key parameters,effect of pipe flaws,soil spatial variability and behaviours of curved *** study helps beginners familiarize themselves with PSI analytical methods and provides experienced researchers with ideas for future research directions.

关键词： Pipeline Analytical methods Pipe-soil interactions Seismic fault Settlement Uplift Buckling Tunnelling

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A New BEM for Fractional Nonlinear Generalized Porothermoelastic Wave Propagation Problems

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Computers, materials & Continua 2021年第7期68卷 59-76页

作者： mohamed Abdelsabour Fahmy Department of mathematics Jamoum University CollegeUmm Al-Qura UniversityAlshohdaa25371JamoumSaudi Arabia Department of Basic Sciences Faculty of Computers and InformaticsSuez Canal UniversityNew CampusIsmailia41522Egypt

The main purpose of the current article is to develop a novel boundary element model for solving fractional-order nonlinear generalized porothermoelastic wave propagation problems in the context of temperaturedependent functionally graded anisotropic(FGA)*** system of governing equations of the considered problem is extremely very difficult or impossible to solve analytically due to nonlinearity,fractional order diffusion and strongly anisotropic mechanical and physical properties of considered porous ***,an efficient boundary element method(BEM)has been proposed to overcome this difficulty,where,the nonlinear terms were treated using the Kirchhoff transformation and the domain integrals were treated using the Cartesian transformation method(CTM).The generalized modified shift-splitting(GMSS)iteration method was used to solve the linear systems resulting from BEM,also,GMSS reduces the iterations number and CPU execution time of *** numerical findings show the effects of fractional order parameter,anisotropy and functionally graded material on the nonlinear porothermoelastic stress *** numerical outcomes are in very good agreement with those from existing literature and demonstrate the validity and reliability of the proposed methodology.

关键词： Boundary element method fractional-order nonlinear generalized porothermoelasticity wave propagation functionally graded anisotropic structures Cartesian transformation method

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State-of-the-art review of some artificial intelligence applications in pile foundations

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Geoscience Frontiers 2016年第1期7卷 33-44页

作者： mohamed A.Shahin Department of Civil Engineering Curtin University

Geotechnical engineering deals with materials（e.g. soil and rock） that, by their very nature, exhibit varied and uncertain behavior due to the imprecise physical processes associated with the formation of these materials. Modeling the behavior of such materials in geotechnical engineering applications is complex and sometimes beyond the ability of most traditional forms of physically-based engineering methods. Artificial intelligence（AI） is becoming more popular and particularly amenable to modeling the complex behavior of most geotechnical engineering applications because it has demonstrated superior predictive ability compared to traditional methods. This paper provides state-of-the-art review of some selected AI techniques and their applications in pile foundations, and presents the salient features associated with the modeling development of these AI techniques. The paper also discusses the strength and limitations of the selected AI techniques compared to other available modeling approaches.

关键词： Artificial intelligence Pile foundations Artificial neural networks Genetic programming Evolutionary polynomial regression

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