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A Fractional Fourier Based Medical Image Authentication Approach

Computers, Materials & Continua 2022年第2期70卷 3133-3150页

作者： Fayez Alqahtani mohammed Amoon Walid el-Shafai Department of Software Engineering College of Computer and Information SciencesKing Saud UniversityRiyadh11451Saudi Arabia Department of Computer Science Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Department of Computer Science and Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Department of electronics and electrical Communications Engineering Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt

Patient medical information in all forms is crucial to keep private and secure,particularly when medical data communication occurs through insecure ***,there is a bad need for protecting and securing the color medical images against impostors and *** this paper,an optical medical image security approach is *** is based on the optical bit-plane Jigsaw Transform(JT)and Fractional Fourier Transform(FFT).Different kernels with a lone lens and a single arbitrary phase code are exploited in this security approach.A preceding bit-plane scrambling process is conducted on the input color medical images prior to the JT and FFT processes to accomplish a tremendous level of robustness and *** confirm the efficiency of the suggested security approach for secure color medical image communication,various assessments on different color medical images are examined based on different statistical security ***,a comparative analysis is introduced between the suggested security approach and other conventional cryptography *** simulation outcomes acquired for performance assessment demonstrate that the suggested security approach is highly *** has excellent encryption/decryption performance and superior security results compared to conventional cryptography approaches with achieving recommended values of average entropy and correlation coefficient of 7.63 and 0.0103 for encrypted images.

关键词： Medical image security encryption JT FFT cryptosystem

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CO oxidation and 4-nitrophenol reduction over ceria-promoted platinum nanoparticles impregnated with ZSM-5 zeolite

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Journal of Rare Earths 2022年第8期40卷 1247-1254页

作者： Zeinhom M.el-Bahy mohammed T.Alotaibi Salah M.el-Bahy Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City11884CairoEgypt Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia

Active new ceria-promoted platinum supported on ZSM-5 catalysts were prepared and characterized by X-ray diffraction(XRD),Fourier transform infrared spectra(FTIR),transform electron microscopy(TEM),temperature programmed desorption(TPD),and FTIR of CO *** samples were prepared by the incipient wetness impregnation method and calcined at 500℃.The XRD patterns and FTIR spectra prove that the zeolite framework is kept unaltered after metal *** images prove the presence of Pt nanoparticles with particle size starting from 14 to 27 *** FTIR data suggest the formation of Pt-O-Ce ***-situ FTIR of CO adsorption over reduced samples proves the presence of Pt~0 only,and no Pt^(n+)-CO species are *** prepared catalysts were tested in both oxidation reaction(CO oxidation) in the gas phase and in reduction reaction(4-nitrophenol reduction) in the aqueous ***,CO oxidation by O_(2) results in the formation of a CO_(2) peak at 2347 cm^(-1) as the only CO oxidation product in the studied frequency *** intensity of the CO_(2) peak increases after the addition of Ce,and it is 4 times higher in Pt_(1) Ce_(0.5)ZSM-5 than that in the Ce-free *** to the FTIR data and previous reports,the increase in the catalytic activity may be due to the formation of Pt-O-Ce ***,Ce-promoted Pt_(1) ZSM5 also exhibits enhanced catalytic activity towards the reduction of 4-nitrophenol to 4-aminophenol by NaBH_(4) in the aqueous *** first-order rate constant of the reduction increases ≈13 times after incorporating equal ratios of Pt and Ce(Pt_(1) Ce_(1)ZSM-5),and the activation energy(E_(a)) decreases to 40% of that in the reaction over Pt_(1) ZSM-5.

关键词： 4-Nitrophenol CO oxidation TPD-CO Platinum-cerium ZSM-5 Rare earths

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Effective participation of wind turbines in frequency control of a two-area power system using coot optimization

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Protection and Control of Modern Power Systems 2023年第1期8卷 230-244页

作者： Mahmoud Hussain el-Bahay mohammed elsayed Lotfy Mohamed A.el-Hameed electrical Power and Machines Department Faculty of EngineeringZagazig UniversityZagazig 44519Egypt ECEN Department Faculty of EngineeringA’Sharqiyah University400 IbraOman

In this paper,load frequency control is performed for a two-area power system incorporating a high penetration of renewable energy sources.A droop controller for a type 3 wind turbine is used to extract the stored kinetic energy from the rotating masses during sudden load *** auxiliary storage controller is applied to achieve effec-tive frequency *** coot optimization algorithm(COA)is applied to allocate the optimum parameters of the fractional-order proportional integral derivative(FOPID),droop and auxiliary storage *** fitness function is represented by the summation of integral square deviations in tie line power,and Areas 1 and 2 frequency *** robustness of the COA is proven by comparing the results with benchmarked optimizers including:atomic orbital search,honey badger algorithm,water cycle algorithm and particle swarm *** assessment is confirmed in the following four scenarios:(i)optimization while including PID controllers;(ii)optimization while including FOPID controllers;(iii)validation of COA results under various load disturbances;and(iv)validation of the proposed controllers under varying weather conditions.

关键词： Coot optimizer FOPID Load frequency control Photovoltaic Variable speed wind turbine

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Optimization of energy exchange in microgrid networks: a coalition formation approach

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Protection and Control of Modern Power Systems 2019年第1期4卷 322-331页

作者： Chaimaa Essayeh mohammed Raiss el Fenni Hamza Dahmouni Department of Communication Systems INPTRabatMadinat Al IrfaneMorocco

In this paper, we elaborate a new strategy based on cooperative game theory models to encourage and manage the interactions in a MicroGrid network. The proposed strategy optimizes the cooperation and the energy exchange in a distributed μGrid network. The strategy consists of a two stage algorithm: Coalition formation algorithm which was specifically created to approximate the optimal set of coalitions that return considerable savings. And the Matching game to manage the energy exchange inside each coalition. The performance of our strategy was verified through simulations. These latter show that the losses can be considerably decreased by the use of the proposed strategy: the rate of the loss reduction can reach up to 20% if the two stages are applied on the network. Moreover, the strategy proved to have a fast convergence which makes it operational for real implemented networks.

关键词： MicroGrid network Energy optimization Cooperative Game theory Matching game Coalition formation

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Performance Evaluation of Bottom-Standing Submerged Breakwaters in Regular Waves Using the Meshless Singular Boundary Method

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Journal of Ocean University of China 2019年第4期18卷 823-833页

作者： SENOUCI Fawzi CHIOUKH Nadji DRIS mohammed el-Amine Department of Hydraulics University Djillali Liabes of Sidi Bel-Abbes Sidi Bel-Abbes 22000 Algeria Laboratory of Naval Aero-Hydrodynamics USTO MB Oran 31000 Algeria Laboratory of Civil Engineering and Environment University Djillali Liabes of Sidi Bel-Abbes Sidi Bel-Abbes 22000 Algeria

In this paper, the improved version of the meshless singular boundary method (ISBM) is developed for analyzing the hydrodynamic performance of bottom-standing submerged breakwaters in regular normally incident waves. Both the single and dual prismatic breakwaters of rectangular and trapezoidal forms are examined. Only the impermeable breakwaters are considered in this study. The physical problem is cast in terms of the Laplace equation governing an irrotational flow and incompressible fluid motion with the appropriate mixed-type boundary conditions, and it is solved numerically using the ISBM. The numerical results are presented in terms of the hydrodynamic quantities of reflection and transmission coefficients. The values are first validated against the data of previous studies, computed, and discussed for a variety of structural conditions, including the height, width, and spacing of breakwater submergence. An excellent agreement is observed between the ISBM results and those of other methods. The breakwater width is found to feature marginal effects compared with the height. The present method is shown to accurately predict the resonant conditions at which the maximum reflection and transmission occur. The trapezoidal breakwaters are found to generally present a wide spectrum of reflections, suggesting that they would function better than the rectangular breakwaters. The dual breakwater systems are confirmed to perform much better than single structures.

关键词： meshless improved singular boundary method regular normal waves rectangular and trapezoidal breakwaters reflection transmission

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Premature ejaculation:an update on definition and pathophysiology

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Asian Journal of Andrology 2019年第5期21卷 425-432页

作者： mohammed Abu el-Hamd Ramadan Saleh Ahmad Majzoub department of Dermatology Venereology and AndrologyFaculty of MedicineSohag UniversitySohag 82749Egypt Department of Urology Hamad Medical Corporation and Weill Cornell Medicine-QatarDoha 00974Qatar

Premature ejaculation(PE)is the most comm on male sexual dysfunction,which represents a diag no stic as well as a therapeutic challenge for ***,no universally accepted definition is currently available for *** a result,physicians continue to diagnose patients with PE according to major guidelines set by the professional *** guidelines either recommend the use of validated questionnaires or patient-reported *** efforts directed toward classifying PE may help provide a better understanding of the prevalence and risk factors of this *** the exact etiology of PE has not been clearly elucidated,several risk factors have been strongly reported in the ***,to understand the revised definition of PE,its etiology and pathophysiology is necessary to improve the clinical management of this medical condition and form the basis of future research in this *** this review,we highlight the past and current definitions of PE and present an appraisal on the classifications and theories suggested for the etiopathogenesis of PE.

关键词： ejaculatory disorders male sexual dysfunction premature ejaculation

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Valorization of a Good Bioceramic from Moroccan Waste Fish Bone by a Heat Treatment Method

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Journal of Renewable Materials 2019年第1期7卷 1-7页

作者： Kaoutar Kara Fatiha Ouanji el Mostapha LOTFI mohammed el Mahi Mohamed Kacimi Laboratory of Spectroscopy Molecular ModelingMaterialsNanomaterialsWater and EnvironmentEnvironmental Materials TeamENSETMohammed V UniversityRabatMorocco Laboratory of Nanomaterial Nanotechnology and EnvironmentPhysico-chemical of Material and Catalysis(URAC26)Faculty of SciencesUniversity of Mohammed VRabat.Morocco

A tricalcium phosphate(TCP)material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish *** bones were annealed at temperatures between 400℃ and 1200℃.The thermal analysis(TG-DTA)was carried out to investigate the thermal stability of TCP and to confirm the removal of organic matter from the raw *** calcined bones were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and field emission scanning electron microscopy(FESEM).The calcium to phosphorous weight ratio was determined by ***-IR and XRD confirmed the similarities to syntheticβ-TCP(JCPDS-09-169),FE-SEM results revealed the formation of nanostructured *** results suggest that varying the isolation temperature between 600-1200℃ has tremendous impact on the production of TCP from fish bone waste with the required properties.

关键词： Hydroxyapatite tri-calcium phosphate fish bone heat treatement bioceramic

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A new correlation-based approach for ensemble selection in random forests

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International Journal of Intelligent Computing and Cybernetics 2021年第2期14卷 251-268页

作者： Mostafa el Habib Daho Nesma Settouti mohammed el Amine Bechar Amina Boublenza mohammed Amine Chikh Biomedical Engineering Laboratory University of TlemcenTlemcenAlgeria

Purpose-Ensemble methods have been widely used in the field of pattern recognition due to the difficulty offinding a single classifier that performs well on a wide variety of *** the effectiveness of thesetechniques,studies have shown that ensemble methods generate a large number of hypotheses and thatcontain redundant classifiers in most *** works proposed in the state of the art attempt to reduce allhypotheses without affecting ***/methodology/approach-In this work,the authors are proposing a pruning method that takes intoconsideration the correlation between classifiers/classes and each classifier with the rest of the *** authorshave used the random forest algorithm as trees-based ensemble classifiers and the pruning was made by atechnique inspired by the CFS(correlation feature selection)***-The proposed method CES(correlation-based Ensemble Selection)was evaluated onten datasets from the UCI machine learning repository,and the performances were compared to sixensemble pruning *** results showed that our proposed pruning method selects a smallensemble in a smaller amount of time while improving classification rates compared to the ***/value-CES is a new ordering-based method that uses the CFS *** selects,in a shorttime,a small sub-ensemble that outperforms results obtained from the whole forest and the other state-of-thearttechniques used in this study.

关键词： Ensemble pruning Random forest Tree selection Correlation CFS CES

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Ginseng ameliorates pulmonary toxicity induced by silicon dioxide nanoparticles in rats

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Asian Pacific Journal of Tropical Biomedicine 2021年第6期11卷 254-262页

作者： Raghda A.el-Sayed Fatma M.el-Demerdash mohammed A.el-Magd Department of Environmental Studies Institute of Graduate Studies and ResearchAlexandria UniversityEgypt Department of Anatomy Faculty of Veterinary MedicineKafrelsheikh UniversityEgypt

Objective:To investigate the protective and therapeutic role of ginseng against silicon dioxide nanoparticles(SiO2NPs)-induced toxicity in the ***:Sixty male rats were divided into five groups(n=12/group);group 1 was used as a control,group 2 received ginseng,group 3 was treated with SiO2NPs,and group 4 was pretreated with ginseng one week before SiO2NPs,while group 5 was given SiO2NPs one week before supplementation with *** were treated with both ginseng and SiO2NPs orally for five ***-time PCR was used to measure gene ***,DNA damage and cell cycle changes were determined by comet assay and flow cytometry,*** study was also done to assess the effect of ginseng on SiO2NPs-induced ***:SiO2NPs increased lipid peroxidation and decreased the activities of antioxidant ***2NPs induced apoptosis in lung tissues as revealed by upregulation of Bax and caspase 3 and downregulation of Bcl-2 as well as the induction of DNA ***2NPs also caused inflammation as indicated by upregulation of the inflammation-related genes[interleukin 1 beta(IL-1β),tumor necrosis factor-alpha(TNF-α),nuclear factor kappa B(NF-κB),cyclooxygenase 2(COX2),and transforming growth factor-beta 1(TGFβ1)]as well as cell cycle arrest in the G0/G1 phase of lung ***,histopathological examination proved the biochemical and molecular perturbations that occurred due to SiO2NPs ***,ginseng alleviated SiO2NPs-induced toxicity in rat ***:Ginseng has a potent preventive and therapeutic effect and could be used in the treatment of SiO2NPs-induced pulmonary toxicity.

关键词： Silicon dioxide nanoparticles Ginseng Oxidative stress Inflammation Pulmonary toxicity

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Some Advances in Applications of Lattice Boltzmann Method for Complex Thermal Flows

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Advances in Applied Mathematics and Mechanics 2010年第5期2卷 587-608页

作者： Ridha Djebali Habib Sammouda mohammed el Ganaoui University of Tunis el-Manar FS of TunisDepartment of PhysicsLETTM1060 TunisTunisia CNRS/SPCTS UMR 6638FST of LimogesDepartment of Physics87060 LimogesFrance

Over the past two decades,there have been enormous advances in lattice Boltzmann(LB)numerical simulation and *** lattice Boltzmann method has become a practical and promising tool for many fluid problems.A majority of recent studies have relied on numerical computations of isothermal ***,much less efforts have been devoted to complex thermal flows,such as flows in porous media subjected to external magnetic force,flows with temperature-dependent *** this paper,an overview is made based on some accomplishments in these numerical *** with the paper’s sections,the state-of-the-art trend and the LBM advances in modelling and in computational aspects for specific classes of problems of major interest will be fully touched *** remarks are given and the axis of our future studies will be traced.

关键词： LB method Bifurcations and instability porous media flows plasma jets

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