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Secure Data Sharing with Confidentiality,Integrity and Access Control in Cloud Environment

Computer Systems Science & Engineering 2022年第2期40卷 779-793页

作者： v.Rajkumar m.Prakash v.vennila Department of Computer Science and Engineering Krishnasamy College of Engineering and Technology(Affiliated to Anna UniversityChennai)Cuddalore607109India Department of Computer Science and Engineering School of ComputingSRM Institute of Science&TechnologyKattankulathur603203India Department of Computer Science and Engineering K.S.R.College of Engineering(Affiliated to Anna UniversityChennai)Tiruchengode637215India

Cloud storage is an incipient technology in today’s *** of security in cloud environment is one of the primary challenges faced these *** scenario poses new security issues and it forms the crux of the current *** current study proposes Secure Interactional Proof System(SIPS)to address this *** methodology has a few key essential components listed herewith to strengthen the security such as authentication,confidentiality,access control,integrity and the group of components such as AvK Scheme(Access List,verifier and Key Generator).It is challenging for every user to prove their identity to the verifier who maintains the access *** is conducted by following Gulliou-Quisquater protocol which determines the security level of the user in multi-step authentication ***,RSA algorithm performs the key generation process while the proposed methodology provides data integrity as well as confidentiality using asymmetric *** methodological operations such as time consumption have been used as performance evaluators in the proposed SIPS *** proposed solution provides a secure system for firm data sharing in cloud environment with confidentiality,authentication and access *** Timed Petri(STPN)Net evaluation tool was used to verify and prove the formal analysis of SIPS *** evidence established the effectiveness of the proposed methodology in secure data sharing in cloud environment.

关键词： Secure interactional proof system access control multi-step authentication Gulliou-Quisquater protocol

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Formation and Characterization of Ceramic Nanocomposite Crystalline Coatings on Aluminium by Anodization

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Journal of materials Science & Technology 2013年第7期29卷 595-602页

作者： m.mubarak Ali v.Raj School of Chemical Engineering Yeungnam UniversityGyeongsanGyeongbuk 712-749South Korea Advanced materials Research Laboratory Department of ChemistryPeriyar UniversitySalem 636 011Tamil NaduIndia

Ceramic nanocomposite coatings have been synthesized on aluminium by using lithium sulphate electrolyte with zirconium silicate additive by anodization. The effects of current density （CD） on microhardness, structure, composition and surface topography of the oxide layer formed at various CDs （0.1-0.25 A/cm^2） have been studied. Crystalline coatings formed at 0.25 A/cm^2 have been （width 95 nm） observed with a relatively uniform distribution confirmed by scanning electron microscopy. Additionally, the average microhardness value of ceramic nanocomposite coatings fabricated from lithium sulphate-zirconium silicate bath is approximately 8.5 times higher than that of the as-received aluminium. The surface statistics of the coatings is discussed in detail to explain the roughness and related parameters for better understanding. These observations demonstrate the importance of surface statistics in controlling the morphology of the coatings and its properties. From the X-ray diffraction investigations, it can be concluded that the formed nanocomposite coatings are crystalline in nature and that the crystallinity of the coatings decreases with increasing applied current density.

关键词： Anodization Nanocomposite Coatings Alumina Aluminium

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Formation and Surface Structural Features of Crystalline Ceramic Nanocomposite Coatings on Aluminium Using Lithium Sulphate with Silicate Additive

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Acta metallurgica Sinica(English Letters) 2014年第2期27卷 185-197页

作者： m.mubarak Ali v.Raj Department of Chemistry Chikkaiah Naicker College Advanced materials Research Laboratory Department of ChemistryPeriyar University

We have synthesized a series of the ceramic coatings by anodization of aluminium using lithium sulphate and sodium silicate additive. Our experiments show that the present coatings are nanocomposites in nature, consisting of a mixture of nanocrystalline alumina, silica, aluminium silicate and mullite; the formation of alumina was similar to conventional anodizing technology, while the formation of mullite was attributed to an addition of sodium silicate. The microhardness of the coatings progressively increased with the increasing current density up to 0.2 A/cm2, which could mainly be attributed to the decrease of porosity in the interfacial region of the oxides up to the range. From the performance of the coatings against corrosion （Tafel/Nyquist plots）, it was inferred that the coatings fabricated by lithium sulphatesodium silicate bath have enhanced corrosion resistance （Rp = 3.12 kΩ）, as well as better microhardness value than that of the lithium sulphate bath alone （Rp = 660.96 Ω） which confirm the perception that the silica particles included in the anodized alumina matrices randomly. Presence of Al, Si and O indicated that the electrolyte components had been intensively incorporated into the coatings.

关键词： Anodization Nanocomposite Ceramic Lithium sulphate

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Twofold hidden conformal symmetry of Kerr-Bolt black holes

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Chinese Physics B 2012年第2期21卷 117-122页

作者： m.R.Setare v.Kamali Department of Science Campus of BijarUniversity of Kurdistan BijarIran

Previously we have shown that a four-dimensional Kerr-Bolt black hole in non-extremal and also in extremal cases could be described by a holographic two-dimensional （2D） conformal field theory （CFT） [Ghezelbash A m, Kamali v and Setare m R 2010 Phys. Rev. D 82 124051; Setare m R and Kamali v 2010 JHEP 10 074]. motivated by recent work [Chen C m, Huang Y m, Sun J R, Wu m F and Zou S J 2010 Phys. Rev. D 82 066004], we show that there is another holographic description for these black holes. The first description is called the J-picture, whose construction is based on the black hole angular momentum. The new description is called the Q-picture, whose constructions originate from the nut charge of the black hole. Similar to the previous cases [Ghezelbash A m, Kamali v and Setare m R 2010 Phys. Rev. D 82 124051; Setare m R and Kamali v 2010 JHEP 10 0741, we show that this new picture for a low frequency limit of the wave equation of a massless charged scalar field in the background of a Kerr-Bolt black hole can be written as the Casimir of SL（2, R） symmetry. Our result shows that the entropy of the black hole is reproduced by the Cardy formula. In addition, the absorption cross section is consistent with the finite temperature absorption cross section for a two-dimensional CFT.

关键词： Kerr-Bolt back hole holographic descriptions hidden conformal symmetry Cardy formula

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main Directions and Recent Test modeling Results of Lithium Capillary-Pore Systems as Plasma Facing Components

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Plasma Science and Technology 2004年第3期6卷 2291-2295页

作者： v.A.Evtikhin I.E.Lyublinski A.v.vertkov E.A.Azizov S.v.mirnov v.B.Lazarev S.m.Sotnikov v.m.Safronov A.S.Prokhorov v.m.Korzhavin FSUE "Red Star"-"Prana-Center" Co Moscow Russian FSUE TRINITI Troitsk Moscow region Russian Federation RF ministry for Atomic Energy Moscow

At present the most promising principal solution of the divertor problemappears to be the use of liquid metals and primarily of lithium Capillary-Pore Systems (CPS) as ofplasma facing materials. A solid CPS filled with liquid lithium will have a high resistance tosurface and volume damage because of neutron radiation effects, melting, splashing and thermalstress-induced cracking in steady state and during plasma transitions to provide the normaloperation of divertor target plates and first-wall protecting elements. These materials will not bethe sources of impurities inducing an increase of Z_(eff) and they will not be collected as dust inthe divertor area and in ducts. Experiments with lithium CPS under simulating conditions of plasmadisruption on a hydrogen plasma accelerator mK-200 [~ (10 - 15) mJ/m^2, ~ 50 μs] have beenperformed. The formation of a shielding layer of lithium plasma and the high stability of thesesystems have been shown. The new lithium limiter tests on an up-graded T-11m tokamak (plasma currentup to 100 kA, pulse length ~0.3 s) have been performed. Sorption and desorption of plasma-forminggas, lithium emission into discharge, lithium erosion, deposited power of the limiter areinvestigated in these experiments. The first results of experiments are presented.

关键词： lithium divertor plasma facing material

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A Novel Synthesis of malic Acid Capped Silver Nanoparticles using Solanum lycopersicums Fruit Extract

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Journal of materials Science & Technology 2013年第4期29卷 317-322页

作者： m.Umadevi m.R.Bindhu v.Sathe Department of Physics Mother Teresa Women's UniversityKodaikanal 624 102Tamil NaduIndia UGC-DAE Consortium for Scientific Research University CampusKhandwa RoadIndore 452 017India

Integration of green chemistry principles to nanotechnology is one of the key issues in nanoscience research. The development of the concept of green nanoparticle preparation has been growingly needed for environmentally benign metal nanoparticle synthesis protocols to avoid adverse effects in medical applications. Keep this in mind, in the present study, silver nanoparticles were synthesized using Solanum lycopersicums fruit extract. The prepared silver nanoparticles were characterized by Uv-visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy and transmission electron microscopy techniques. The surface plasmon resonance peak was found at 445 nm. The synthesized silver nanoparticles were spherical in shape with the average size of 10 nm. The citric acid present in S. lycopersicums fruit extract acted as reducing agent and malic acid was responsible for capping of the bioreduced silver nanoparticles.

关键词： Silver nanoparticles Solanum lycopersicums Uv--visible spectroscopy Fourier transform infrared spectroscopy Ramanspectroscopy

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Evaluation of Zero and Sub-zero Temperature Tensile and Impact Properties of Quenched and Tempered Steel Weldments

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Journal of Iron and Steel Research International 2016年第11期23卷 1177-1187页

作者： m.BALAKRISHNAN v.BALASUBRAmANIAN m.A.mUTHU mANICKAm Department of mechanical Engineering M.Kumarasamy College of Engineering(Autonomous)ThalavapalayamKarur 639113Tamil NaduIndia Center for materials Joining&Research(CEmAJOR) Department of Manufacturing EngineeringAnnamalai UniversityAnnamalainagar 608002Tamil NaduIndia Combat vehicles Research and Development Establishment(CvRDE) AvadiChennai 600054Tamil NaduIndia

Combat vehicles using armour grade quenched and tempered （Q＆T） steel are needed to be operated under different climatic conditions. However, the properties meeting the room temperature test conditions may not neces-sarily be required to meet the low temperature operating conditions. The influences of shielded metal arc welding （SmAW） process, flux cored arc welding （FCAW） processes and test temperatures below room temperature up to 60℃ on tensile and impact toughness properties of armour grade Q＆T steel welds were reported. The tensile and impact properties of the joints showed incremental trend with respect to the decrement in test temperature up to -40℃ irrespective of the welding processes used. The increment in tensile and impact properties of SmAW and FCAW joints subjected to the low temperature environment is due to plastic strain-induced phase transformation of retained austenite into martensite phase. Among the two processes, SmAW process welded joint showed better tensile and impact properties than its FCAW counterpart joints.

关键词： shielded metal arc welding flux cored arc welding low temperature property microstrncture: hardness

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Calculation and Analysis of velocity and viscous Drag in an Artery with a Periodic Pressure Gradient

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Chinese Journal of mechanical Engineering 2012年第4期25卷 715-721页

作者： ALIZADEH m SEYEDPOUR S m mOZAFARI v BABAZADEH Shayan S Department of mechanical Engineering Iran University of Science and TechnologyTehranIran Department of mechanical Engineering Islamic Azad University of Science and ResearchTehranIran Department of mechanical Engineering Tarbiat Modares UniversityTehranIran

Blood as a fluid that human and other living creatures are dependent on has been always considered by scientists and *** changes in blood pressure and its normal velocity can be a sign of a *** significant in blood fluid＇s mechanics is Constitutive equations and finding some relations for analysis and description of drag,velocity and periodic blood pressure in *** this paper,by considering available experimental quantities,for blood pressure and velocity in periodic time of a thigh artery of a living dog,at first it is written into Fourier series,then by solving Navier-Stokes equations,a relation for curve drawing of vessel blood pressure with rigid wall is *** in another part of this paper,vessel wall is taken in to consideration that vessel wall is elastic and its pressure and velocity are written into complex Fourier *** this case,by solving Navier-Stokes equations,some relations for blood velocity,viscous drag on vessel wall and blood pressure are *** this study by noting that vessel diameter is almost is large（3.7 mm）,and blood is considered as a Newtonian ***,available experimental quantities of pressure with obtained curve of solving Navier-Stokes equations are *** blood analysis in rigid vessel,existence of 48% variance in pressure curve systole peak caused vessel blood flow analysis with elastic wall,results in new relations for blood flow *** Resultant curve is obtained from new relations holding 10% variance in systole peak.

关键词： artery newtonian fluid rigid & elastic wall newtonian fluid

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Dynamic modeling of a three-dimensional braided composite thin plate considering braiding directions

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 123-138页

作者： Chentong GAO Huiyu SUN Jianping GU W.m.HUANG College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics School of mechanical and Aerospace Engineering Nanyang Technological University Jiangsu Key Laboratory of Advanced Structural materials and Application Technology School of Materials Science and EngineeringNanjing Institute of Technology

Currently, there are a limited number of dynamic models available for braided composite plates with large overall motions, despite the incorporation of three-dimensional(3D) braided composites into rotating blade components. In this paper, a dynamic model of 3D 4-directional braided composite thin plates considering braiding directions is established. Based on Kirchhoff's plate assumptions, the displacement variables of the plate are expressed. By incorporating the braiding directions into the constitutive equation of the braided composites, the dynamic model of the plate considering braiding directions is obtained. The effects of the speeds, braiding directions, and braided angles on the responses of the plate with fixed-axis rotation and translational motion, respectively, are investigated. This paper presents a dynamic theory for calculating the deformation of 3D braided composite structures undergoing both translational and rotational motions. It also provides a simulation method for investigating the dynamic behavior of non-isotropic material plates in various applications.

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Takagi-Sugeno Fuzzy Regulator Design for Nonlinear and Unstable Systems Using Negative Absolute Eigenvalue Approach

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 482-493页

作者： Ravi v.Gandhi Dipak m.Adhyaru Department of Electrical Engineering Indian Institute of Technology(IIT)GandhinagarGandhinagar 382355India Department of Instrumentation&Control Engineering Institute of TechnologyNirma UniversityAhmedabad-382481India

This paper introduces a Takagi-Sugeno(T-S)fuzzy regulator design using the negative absolute eigenvalue(NAE)approach for a class of nonlinear and unstable *** open-loop system is initially embodied by the traditional T-S fuzzy model and then,all closed-loop subsystems are combined using the proposed max-min operator in place of traditional weighted average operator from the controller side to lessen the coupling virtually and simplify the proposed regulator *** each virtually decoupled closed-loop subsystem,the composite regulators(i.e.,primary and secondary regulators)are designed by the NAE approach based on the enhanced eigenvalue *** Lyapunov function is utilized to guarantee the asymptotic stability of the overall T-S fuzzy control *** most popular and widely used nonlinear and unstable systems like the electromagnetic levitation system(EmLS)and the inverted cart pendulum(ICP)are simulated for the wide range of the initial conditions and the enormous variation in the *** transient and steady-state performance of the considered systems using the proposed design are analyzed in terms of the decay rate,settling time and integral errors as IAE,ISE,ITAE,and ITSE to validate the effectiveness of the proposed approach compared to the most popular and traditional parallel distributed compensation(PDC)approach.

关键词： Eigenvalue approach nonlinear and unstable systems stability analysis Takagi-Sugeno(T-S)fuzzy regulator

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