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Graph-Based Replication and Two Factor Authentication in Cloud Computing

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Computer systems science & Engineering 2023年第6期45卷 2869-2883页

作者： s.Lavanya N.M.saravanakumar sri Krishna College of Engineering and Technology Coimbatore641008TamilnaduIndia M.Kumarasamy College of Engineering Karur639113Tamil NaduIndia

Many cutting-edge methods are now possible in real-time commercial settings and are growing in popularity on cloud *** incorporating new,cutting-edge technologies to a larger extent without using more infrastructures,the information technology platform is anticipating a completely new level of *** following concepts are proposed in this research paper:1)A reliable authentication method Data replication that is optimised;graph-based data encryp-tion and packing colouring in Redundant Array of Independent Disks(RAID)*** the data centre,data is encrypted using crypto keys called Key *** keys are produced using the packing colouring method in the web graph’s jump *** order to achieve space efficiency,the replication is carried out on optimised many servers employing packing *** would be thought that more connections would provide better *** study provides an innovative architecture with robust security,enhanced authentication,and low cost.

关键词： Graph-based encryption replication encryption packing coloring jump graph web graph stream cipher key stream

Grain boundary effect on structural, optical, and electrical properties of sol-gel synthesized Fe-doped snO_(2) nanoparticles

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Chinese Physics B 2021年第4期30卷 555-564页

作者： Archana V Lakshmi Mohan Kathirvel P saravanakumar s Department of sciences Amrita School of EngineeringCoimbatoreAmrita Vishwa VidyapeethamIndia Research and Development Center Bharathiar UniversityCoimbatore-641046TamilnaduIndia GRD Center for Materials Research Department of PhysicsP S G College of TechnologyCoimbatore-641004TamilnaduIndia Department of Physics N S S CollegePandalam-689501KeralaIndia

Tin oxide(snO_(2)) and iron-doped tin oxide(sn_(1-x)Fe_(x)O_(2),x=0.05 wt%,0.10 wt%) nanoparticles are synthesized by the simple sol-gel *** structural characterization using x-ray diffraction(XRD) confirms tetragonal rutile phases of the *** variations in lattice parameters and relative intensity with Fe-doping concentration validate the incorporation of iron into the *** compressive strain present in the lattice estimated by using peak profile analysis through using Williamson-Hall plot also exhibits the influence of grain boundary formation in the *** radiative recombination and quenching observed in optical characterization by using photoluminescence spectrum(PL) and the shift in the band gap estimated from UV-visible diffused reflectance spectrum corroborate the grain boundary *** spectrum and the morphological analysis by using a field emission scanning electron microscope(FEsEM) also indicate the formation of grain *** compositional analysis by using energy dispersive x-ray spectrum(EDAX) confirms Fe in the snO_(2) *** conductivity studies exhibit that the impendence increases with doping concentration increasing and the loss factor decreases at high frequencies with doping concentration increasing,which makes the sn_(1-x)Fe_(x)O_(2) a potential candidate for device applications.

关键词： sol-gel compressive strain grain boundary AC conductivity

An Efficient On-Demand Virtual Machine Migration in Cloud Using Common Deployment Model

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Computer systems science & Engineering 2022年第7期42卷 245-256页

作者： C.saravanakumar R.Priscilla B.Prabha A.Kavitha M.Prakash C.Arun Department of Information Technology St.Joseph’s Institute of TechnologyChennai600119India Department of Information Technology Loyola-ICAM College of Engineering and TechnologyChennai600034India Department of Electronics and Communication Engineering M.Kumarasamy College of EngineeringKarur639113India Data science and Analytics Center Karpagam College of EngineeringCoimbatore641032India Department of Electronics and Communication Engineering R.M.K College of Engineering and TechnologyChennai601206India

Cloud Computing provides various services to the customer in aﬂex-ible and reliable *** Machines(VM)are created from physical resources of the data center for handling huge number of requests as a *** tasks are executed in the VM at the data center which needs excess hosts for satis-fying the customer *** VM migration solves this problem by migrating the VM from one host to another host and makes the resources available at any *** process is carried out based on various algorithms which follow a pre-deﬁned capacity of source VM leads to the capacity issue at the destination *** proposed VM migration technique performs the migration process based on the request of the requesting host *** technique can perform in three ways namely single VM migration,Multiple VM migration and Cluster VM *** Deployment Manager(CDM)is used to support through negotiation that happens across the source host and destination host for providing the high quality service to their *** VM migration requests are handled with an exposure of the source host *** proposed analysis also uses the retired instructions with execution by the hypervisor to achieve high *** objective of the proposed technique is to perform a VM migration process based on the prior knowledge of the resource availability in the target VM.

关键词： Cloud computing virtualization hypervisor VMmigration virtual machine

A novel n-CeO2/n-CdO heterojunction nanocomposite for enhanced photodegradation of organic pollutants under visible light irradiation

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Journal of Rare Earths 2019年第8期37卷 853-860,I0003页

作者： Karunamoorthy saravanakumar subramani Muthupoongodi Velluchamy Muthuraj Department of Chemistry V.H.N.S.N CollegeVirudhunagar626 001TamilnaduIndia Department of Chemistry Sri Kaliswari CollegeSivakasi626 130TamilnaduIndia Department of Chemistry Thiagarajar CollegeMadurai625 009TamilnaduIndia

In this study,a series of novel visible light driven n-CeO2/n-CdO heterojunction(CeO2/CdO)nanoco mposites we re successfully fabricated by simple ultrasonication *** characte rization tools including X-ray diffraction(XRD),scanning electro n microscopy(sEM),transmission electron microscopy(TEM)and UV-vis diffuse reflectance spectroscopy(UV-DRs),etc.,were utilized to investigate the physicochemical properties of the catalyst and confirm the formation of *** visible light irradiations,the photocatalytic activities of the as-prepared CeO2/CdO nanocomposites were evaluated by degrading of Congo red(CR)and Rhodamine B(RhB)*** a result,the CeO2/CdO(mass percentage ratio 1:3)nanocomposite displays remarkable performance for CR and RhB *** enhancement in the photocatalytic performance of CeO2/CdO(1:3)nanocomposite can be attributed not only to the strong visible-light absorption region,separating the photogenerated electronhole pairs but also to the formation of n-n type *** results also indicate that the CeO2/CdO(1:3)nanocomposite has good stabilization and high *** addition,the mechanism is proposed for the coupled semiconductors and possible reasons for the enhancement of visible-light photocatalytic efficiency are also *** work can provide a new gateway to fabricate visible photocatalysts and promising candidate catalysts for poisonous wastewater treatment in the near future.

关键词： n-CeO2/n-CdO Heterojunction Visible light Photocatalysis Photodegradation Rare earths

Effect of imidazole based polymer blend electrolytes for dye-sensitized solar cells in energy harvesting window glass applications

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Chinese Journal of Chemical Engineering 2019年第11期27卷 2807-2814页

作者： K.M.Manikandan A.Yelilarasi s.s.saravanakumar P.senthamaraikannan Anish Khan Abdullah M.Asiri Department of Physics Kamaraj College of Engineering and TechnologyK.VellakulamVirudhunagar625701 MaduraiTamil NaduIndia Department of Mechanical Engineering Kamaraj College of Engineering and TechnologyK.VellakulamVirudhunagar625701 MaduraiTamil NaduIndia Chemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Center of Excellence for Advanced Materials Research King Abdulaziz UniversityJeddah 21589P.O.Box 80203Saudi Arabia

The exploration of polymer electrolyte in the field of dye sensitized solar cell(DssC) can contribute to increase the invention of renewable energy applications. In the present work, the influence of imidazole on the poly(vinylidene fluoride)(PVDF)–poly(methyl methacrylate)(PMMA)–Ethylene carbonate(EC)–KI–I2 polymer blend electrolytes has been evaluated. The different weight percentages of imidazole added into polymer blend electrolytes have been prepared by solution casting. The prepared films were characterized by Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), thermogravimetric analysis(TGA), UV–visible spectra, photoluminescence spectra and impedance spectroscopy. The surface roughness texture of the film was analyzed by atomic force microscopy(AFM). The ionic conductivity of the optimized polymer blend electrolyte was determined by impedance measurement, which is 1.95 × 10-3 s·cm-1 at room temperature. The polymer electrolyte containing 40 wt% of imidazole content exhibits the highest photo-conversion efficiency of 3.04%under the illumination of 100 m W·cm-2. Moreover, a considerable enhancement in the stability of the DssC device was demonstrated.

关键词： Polymer blend electrolyte Imidazole Dye-sensitized solar cell surface roughness Ionic conductivity

Trend in Coral-Algal Phase shift in the Mandapam Group of Islands, Gulf of Mannar Marine Biosphere Reserve, India

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Journal of Ocean University of China 2016年第6期15卷 1080-1086页

作者： M. Machendiranathan L. senthilnathan R. Ranith A. saravanakumar T. Thangaradjou s. B. Choudhrys s. K. sasama Center of Advanced studies in Marine Biology Faculty of Marine Sciences Annamalai University Parangipettai - 608502 Tamilnadu India Academy of Maritime Education and Training (AMET) University Center for Maritime Information ServicesChennai - 603112 Tamilnadu India Central Marine Fisheries Research Institute ( CMFRI) Fishery Environment Management DivisionKochi - 682018 Kerala India science and Engineering Research Board (sERB) New Delhi - 110070 India National Remote sensing Center lndian Space Research Organization (Dept. of Space Govt. of India)Balanagar Hyderabad - 500625 Andhra Pradesh lndia

The present study revealed proliferation of macro-algae modifying coral reef ecosystems in a different manner due to diseases and sedimentations in the Mandapam group of islands in the Gulf of Mannar. Benthic surveys were conducted with major attack of seven coral reefs diseases with high sedimentation rate, nine species of fleshy macro-algae(Turbinaria ornata, Turbinaria conaides, Caulerpa scalpelliformis, Caulerpa racemosa, Kappaphycus alvarezii, Padina gymnosphora, sargassum wightii, Ulva reticulata and Calurpa lentillifera) proliferation against major corals life forms(Acropora branching, Acropora digitate, Acropora tabulate, coral massive, coral submassive, coral foliose and coral encrusting). The results confirm that diseased corals most favor to macro-algae growth(15.27%) rather than the sedimentation covered corals(8.24 %). In the degradation of coral life forms, massive corals were more highly damaged(7.05%) than any other forms. Within a short period of time(May to september), coral coverage shrank to 17.4% from 21.9%, macro-algae increased 23.51% and the average sedimentation rate attained 77.52 mg cm^(-2) d^(-1) with persisting coral reef diseases of 17.59%. The Pearson correlation showed that the coral cover decreased with increasing macro-algae growth, which was statistically significant(r =-0.774, n = 100, P s macro-algae C. scalpellifrmis, T. ornata, C. racemosa, T. conaides, U. reticulata, s. wightii, K. alvarezii, P. gymnosphora and C. lentillifera increased with percentages of 6.0, 5.8, 5.7, 4.9, 4.2, 3.7, 2.7 and 1.9, respectively. If this trend continues, the next generation of new recruit corals will undoubtedly lead to a phase shift in Gulf of Mannar corals.

关键词：珊瑚藻生物圈保护区相移平均沉积速率宏观藻类海洋印度沉积作用

Modeling of COVID-19 disease disparity in gastric organoids reveals the spatiotemporal dynamics of sARs-CoV-2 infectivity

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Journal of Molecular Cell Biology 2022年第2期14卷 80-83页

作者： Wenwen Wang Fengrui Yang Jie Lin saravanakumar Muthusamy shihao Du McKay Mullen Fatima Garba Wanjuan Wang Xu Liu Tao Li Zhihong Yang Xia Ding Felix Aikhionbare Xinjiao Gao Zhikai Wang Xing Liu Xuebiao Yao MOE Key Laboratory for Cellular Dynamics University of Science&Technology of China School of Life SciencesHefei 230027China Keck Center for Organoids Plasticity and Department of surgery Morehouse School of MedicineAtlantaGA 30310USA Anhui Key Laboratory for Cellular Dynamics&Chemical Biology CAS Center of Excellence in Molecular Cell SciencesHefei 230027China Department of Gastroenterology Beĳing University of Chinese MedicineBeĳing 100081China

Dear Editor,The promptness and continuous expansion of the coronavirus disease 2019(COVID-19)pandemic,elicited by severe acute respiratory syndrome coronavirus 2(sARs-CoV-2)and its variants,has presented an unprecedented impact on human health(WHO Coronavirus(COVID-19)Dashboard,2021).Although vaccination has attenuated the severe symptoms,there is no specific antiviral medication available for preventing the viral spread(Drayman et al.,2021).

关键词： acute respiratory

Heavy Metal Distribution in sediments of Muthupettai Mangroves, south East Coast of India

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Journal of Ocean University of China 2011年第4期10卷 385-390页

作者： B.Thilagavathi K.Raja Bandana Das A.saravanakumar s.Vijayalakshmi T.Balasubramanian CAs in Marine Biology Faculty of Marine SciencesAnnamalai University

Core sediments from the Muthupettai mangroves on the southeast coast of India were analyzed for soil texture,total nitrogen,organic carbon,phosphorus and heavy metals(Fe,Mn,Cr,Cu,Ni,Pb,Zn and Cd).The distinct seasonal variation in the distribution of metals in the sediments was *** minimum concentration was recorded in river mouth and the maximum was in *** metal concentration in sediment was observed during monsoon and low concentration in *** total nu-trient in lagoon and river mouth was recorded in the range of 4.528 to 8.526 mg g-1 for organic carbon,2.213 to 10.5 mg g-1 for nitro-gen and 0.824 to 7.22 mg g-1.

关键词：红树属植物重金属核心沉积土壤质地沉积营养素