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A novel hybrid authentication protocol utilizing lattice-based cryptography for IoT devices in fog networks

Digital Communications and Networks 2024年第4期10卷 989-1000页

作者： kumar Sekhar Roy Subhrajyoti Deb hemanta kumar kalita Department of Computer Science and Engineering Manipal Institute of Technology BengaluruManipal Academy of Higher EducationManipal576104KarnatakaIndia Department of Computer Science&Engineering ICFAI UniversityAgartala799210India Department of Computer Science&Engineering Central Institute of TechnologyKokrajhar783370India

The Internet of Things(IoT)has taken the interconnected world by *** to their immense applicability,IoT devices are being scaled at exponential proportions ***,very little focus has been given to securing such *** these devices are constrained in numerous aspects,it leaves network designers and administrators with no choice but to deploy them with minimal or no security at *** have seen distributed denial-ofservice attacks being raised using such devices during the infamous Mirai botnet attack in *** we propose a lightweight authentication protocol to provide proper access to such *** have considered several aspects while designing our authentication protocol,such as scalability,movement,user registration,device registration,*** define the architecture we used a three-layered model consisting of cloud,fog,and edge *** have also proposed several pre-existing cipher suites based on post-quantum cryptography for evaluation and *** also provide a fail-safe mechanism for a situation where an authenticating server might fail,and the deployed IoT devices can self-organize to keep providing services with no human *** find that our protocol works the fastest when using ring learning with *** prove the safety of our authentication protocol using the automated validation of Internet security protocols and applications *** conclusion,we propose a safe,hybrid,and fast authentication protocol for authenticating IoT devices in a fog computing environment.

关键词： Internet of things Authentication Post-quantum cryptography Lattice-based cryptography Cloud computing Fog computing Fail-safe

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A New Algorithm of Self Organization in Wireless Sensor Network

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Wireless Sensor Network 2010年第1期2卷 43-47页

作者： hemanta kumar kalita Avijit KAR 不详

Self organization is one of the most important characteristics in an Ad-hoc Sensor Network. Thousands of Sensors are deployed in a geographical area randomly without considering the location factor. After deployment, sensors are to self organize themselves to form a network of their own. How well the network is formed determines the life of the whole network as well as the quality of data transmission. Self organization based on clustering has proven to be very useful in this regard. Since hierarchical clustering reduces energy consumption by routing data from one node to another. In this paper, we discuss a new algorithm for self organization of sensors deployed in a geographical area. The algorithm forms clusters of sensors by ordering them using a unique triangulation method. This algorithm not only considers all sensors but also groups them so that their inherent clustering property is preserved.

关键词： Self-Organization Wireless Sensor Network OPTICS

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Vegetation and ecosystem carbon recovery following shifting cultivation in MizoramManipur-Kachin rainforest eco-region,Southern Asia

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Ecological Processes 2020年第1期9卷 236-248页

作者： Anudip Gogoi Uttam kumar Sahoo hemanta Saikia Department of Forestry Mizoram UniversityAizawl 796004India College of Sericulture Assam Agricultural UniversityJorhat 785013India

Background:Shifting cultivation(locally known as“jhum”)is a major driver of deforestation and loss of ecosystem services in *** developing any effective conservation of biodiversity and carbon service program,an indepth understanding to the recovery of vegetation and carbon after abandonment of jhum is *** estimated species richness,abundance and composition of trees,shrubs and herbs,carbon distribution in aboveground and belowground components along a chronosequence of jhum fallow in northeast India,and elucidated the factors affecting the recovery processes of jhum ***:Species composition and other plant community attributes,carbon storage in different pools were studied in 5 jhum fallows(<5,5-10,11-15,16-20,21-25 years old)and an old-growth *** data were subjected to linear mixed effect modeling using R-package“nlme”for identifying the important factors contributing to the recovery of vegetation and ***:Species composition varied significantly(P<0.05)between jhum fallows and old-growth *** density varied from 28 stems ha−1 in 5 years old jhum fallow to 163 stems ha−1 in old-growth *** biomass carbon in all components and soil organic carbon were significantly(P=0.01)lower in jhum fallows than in the old-growth forest except living non-woody biomass *** recovery of aboveground biomass carbon was faster during early successive years than the mid-successive jhum *** ecosystem carbon and soil organic carbon stock in the oldest jhum fallow was 33%and 62%of those in the old-growth forest,*** fallow age was found to be the most important explanatory factor in the recovery process of vegetation and carbon stock in re-growing ***:The shifting cultivation fallows gradually recovered both vegetation and carbon and are potential repository sites for biodiversity conservation,which may take much longer time to reach up to old-growth forest in northeast India.

关键词： Biodiversity conservation Regrowth forest Vegetation succession Carbon storage Restoration of degraded land

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Shear Strength and Morphological Study of Polyurethane- OMMT Clay Nanocomposite Adhesive Derived from Vegetable Oil-Based Constituents

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Journal of Renewable Materials 2018年第1期6卷 117-125页

作者： Swarnalata Sahoo Hemjyoti kalita Smita Mohanty Sanjay kumar Nayak Central Institute of Plastic Engineering and Technology ChennaiTamil Nadu 600032India Laboratory for Advanced Research in Polymeric Materials(LARPM) CIPETBhubaneswar 751024 India and ChennaiTamil Nadu 600032India

In the current work,we have synthesized vegetable oil-based polyurethane-OMMT clay nanocomposite(PUNC)adhesive with the incorporation of different wt%of organically modified nanoclay(1 to 5 wt%)into the biobased polyurethane(PU)matrix through in-situ polymerization process via ultrasonication *** the initial stage,PU adhesive was prepared using polyol and partially biobased aliphatic isocyanate,wherein polyol was derived from the transesterified castor oil using ethylene *** formation of PU and PUNC adhesive was confirmed using Fourier transform infrared(FTIR)spectroscopy *** tensile strength of PU with different wt%of nanoclay was determined and the analysis showed that the loading of 3 wt%of nanoclay within the PU matrix showed better performance as compared to the ***,shear strength of PU and PUNC(3 wt%nanoclay)adhesives were determined using lap shear test,in which PUNC adhesive showed higher adhesive strength at 70°***,the dispersibility of OMMT nanoclay within the PU matrix along with exfoliation and amorphous structure was confirmed through wide angle X-ray diffractometer(WAXD)and transmission electron microscopy(TEM)*** phase separation structure was analyzed using dynamic mechanical analysis(DMA).The analysis revealed that with the addition of organically modified nanoclay in the PU matrix,the glass transition temperature(Tg)of the damping curve was shifted towards higher temperature.

关键词： Biobased raw material composite material green strength gel time DMA

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Thermal history of a Late Mesoproterozoic paired metamorphic belt(?)during Rodinia assembly:New insight from medium-pressure granulites from the Aravalli-Delhi Mobile Belt, Northwestern India

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Geoscience Frontiers 2018年第2期9卷 335-354页

作者： Santanu kumar Bhowmik Somnath Dasgupta Sudipta Baruah Deepika kalita Department of Geology and Geophysics Indian Institute of Technology Kharagpur Department of Geography Faculty of Natural SciencesJamia Millia Islamia

In this study, we investigate the possible record of a Late Mesoproterozoic paired metamorphic belt in the Aravalli-Delhi Mobile Belt(ADMB), NW India using a suite of supracrustal and metaigneous granulites from the Pilwa-Chinwali granulite terrain at the north-western margin of the ADMB. Using metamorphic reaction textures, mineral chemistry, metamorphic reaction history, geothermobarometric computations and electron microprobe dating of monazite in 5 samples of pelitic granulite, leptynite gneiss, enderbite and charnockite, we have deduced a medium-pressure granulite facies metamorphism(P between 4.9 and 6.8 kbar, T> 760-815℃) along a heating-cooling, counterclockwise P-T path between 1.09 and 1.01 Ga. When collated with published metamorphic and chronological constraints and geological settings of the adjoining crustal domains of the ADMB, these findings provide new insights into the developments of two tectonic domains of contrasting thermal gradients at ca. 1.0 Ga, consistent with metamorphic transformations in tectonically thickened middle-lower crustal sections during continental collision to continental subduction and in the root zones of spatially adjacent island arc, as part of the Rodinia supercontinent assembly event.

关键词： ADMB Granulites CCW-P-T path Monazite chemical dating ca. 1.0 Ga metamorphism Paired metamorphic belt

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Dynamical study of a predator-prey system with Michaelis-Menten type predator-harvesting

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International Journal of Biomathematics 2023年第8期16卷 121-153页

作者： Ankur Jyoti Kashyap Quanxin Zhu hemanta kumar Sarmah Debasish Bhattacharjee Department of Mathematics Gauhati University AssamIndia Department of Mathematics Assam Royal Global University GuwahatiIndia School of Mathematical Sciences and Statistics Hunan Normal University Changsha410081P.R.China Sajkashyap.maths@***

The predation process plays a significant role in advancing life evolution and the maintenance of ecological balance and *** cooperation in predators is one of the most remarkable features of the predation process,which benefits the predators by developing fear upon their *** study investigates the dynamical behavior of a modified LV-type predator-prey system with Michaelis-Menten-type harvesting of predators where predators adopt cooperation strategy during *** ecologically feasible steady states of the system and their asymptotic stabilities are *** local codimension one bifurcations,***,saddle-node and Hopf bifurcations,that emerge in the system are *** approach is utilized to show the appearance of transcritical bifurcation and saddle-node bifurcation.A backward Hopfbifurcation is detected when the harvesting effort is increased,which destabilizes the system by generating periodic *** stability nature of the Hopf-bifurcating periodic orbits is determined by computing the first Lyapunov *** analyses revealed that above a threshold value of the harvesting effort promotes the coexistence of both *** periodic solutions of the system are also observed when the conversion efficiency rate or the hunting cooperation rate is *** have also explored codimension two bifurcations *** generalized Hopf and the Bogdanov-Takens bifurcation exhibit by the *** visualize the dynamical behavior of the system,numerical simulations are conducted using an ecologically plausible parameter *** existence of the bionomic equilibrium of the model is ***,an optimal harvesting policy for the proposed model is derived by considering harvesting effort as a control parameter with the help of Pontryagins maximum principle.

关键词： Hunting cooperation Michaelis-Menten-type harvesting transcritical and saddle-node bifurcation Hopf bifurcation optimal harvesting policy

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Arsenic Stress Responses and Tolerance in Rice: Physiological, Cellular and Molecular Approaches

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Rice science 2018年第5期25卷 235-249页

作者： Jyotirmay kalita Amit kumar PRADHAN Zina Moni SHANDILYA Bhaben TANTI Department of Botany Gauhati University

Arsenic （As）, a potentially toxic metalloid released in the soil environment as a result of natural as well as anthropogenic processes, is subsequently taken up by crop plants. In rice grains, As has been reported in Asia, North America and Europe, suggesting a future threat to food security and crop production. As3＋ by dint of its availability, mobility and phytotoxicity, is the most harmful species of As for the rice crop. Specific transporters mediate the transport of different species of As from roots to the aboveground parts of the plant body. Accumulation of As leads to toxic reactions in plants, affecting its growth and productivity. Increase in As uptake leads to oxidative stress and production of antioxidants to counteract this stress. Cultivars tolerant to As stress are efficient in antioxidant metabolism compared to sensitive ones. Iron and selenium are found to have ameliorating effect on the oxidative stress caused by As. Microbes, even many indigenous ones, in the plant rhizosphere are also capable of utilizing As in their metabolism, both independently and in association. Some of these microbes impart tolerance to As-stress in plants grown in As contaminated sites.

关键词： arsenic rice phytotoxicity hyperaccumulator phytochelatin antioxidant mitigation

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Secure and resilient improved image steganography using hybrid fuzzy neural network with fuzzy logic

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Journal of Safety Science and Resilience 2024年第1期5卷 91-101页

作者： Sachin Dhawan hemanta kumar Bhuyan Subhendu kumar Pani Vinayakumar Ravi Rashmi Gupta Arun Rana Alanoud Al Mazroa Dorset College King George BlvdSurreyBritish ColumbiaCanada Department of Information Technology Vignan’s Foundation for ScienceTechnology and Research(Deemed to be University)Andhra PradeshIndia Krupajal Computer Academy Biju Patnaik University of Technology(BPUT)Rourkela 751002India Center for Artificial Intelligence Prince Mohammad Bin Fahd UniversityKhobarSaudi Arabia NSUT East Campus(Formerly AIACTRDelhi 110031India(Affiliated to Guru Gobind Singh Inderaprastha University))Dwarka 110078India Department of Computer Science and Engineering Galgotias College of Engineering and Technology Greater Noida 201310Uttar PradeshIndia Department of Information Systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman University(PNU)P.O.Box 84428Riyadh 11671Saudi Arabia

The exponential growth in communication networks,data technology,advanced libraries,and mainly World Wide Web services has played a pivotal role in facilitating the retrieval of various types of information as ***,this progress has also led to security concerns related to the transmission of confidential ***,safeguarding these data during communication through insecure channels is crucial for obvious *** emergence of steganography offers a robust approach to concealing confidential information,such as images,audio tracks,text files,and video files,in suitable media carriers.A novel technique is envisioned based on back-propagation *** to the proposed method,a hybrid fuzzy neural network(HFNN)is applied to the output obtained from the least significant bit substitution of secret data using pixel value dif-ferences and exploiting the modification *** simulation and test results,it has been observed that the proposed methodology achieves secure steganography and superior visual *** the experiments,we observed that for the secret image of the cameraman,the PSNR&MSE values of the proposed technique are 61.963895 and 0.041361,respectively.

关键词： Image enhancement Image processing Steganography Deep learning Fuzzy neural combination

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Hybrid Metamodel—NSGA-III—EDAS Based Optimal Design of Thin Film Coatings

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Computers, Materials & Continua 2021年第2期66卷 1771-1784页

作者： Kamlendra Vikram Uvaraja Ragavendran Kanak kalita Ranjan kumar Ghadai Xiao-Zhi Gao Department of Mechanical Engineering Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadi600062India Department of Electronics and Telecommunication Engineering MPSTME SVKM’S Narsee Monjee Institute of Management StudiesShirpur425405India Department of Mechanical Engineering Sikkim Manipal Institute of TechnologySikkim Manipal UniversityMajhitar737136India School of Computing University of Eastern FinlandKuopio70211Finland

In this work,diamond-like carbon(DLC)thin film coatings are deposited on silicon substrates by using plasma-enhanced chemical vapour deposition(PECVD)*** varying the hydrogen(H2)flow rate,CH4−Argon(Ar)flow rate and deposition temperature(Td)as per a Box-Behnken experimental design(BBD),15 DLC deposition experiments are carried *** Young’s modulus(E)and the coefficient of friction(COF)for the DLCs are *** using a second-order polynomial regression approach,two metamodels are built for E and COF,that establish them as functions of H2 flow rate,CH4-Ar flow rate and Td.A non-dominated sorting genetic algorithm(NSGA-III)is used to obtain a set of Pareto solutions for the multi-objective optimization of E maximization and COF *** to various practical scenarios,evaluation based on distance from average solution(EDAS)approach is used to identify the most feasible solutions out of the Pareto solution *** experiments are conducted which shows the efficacy of the polynomial regression—NSGA-III—EDAS hybrid *** surface morphology of the DLCs deposited as per the optimal predictions is also studied by using atomic force microscopy.

关键词： Multi-objective optimization regression analysis thin-film coating

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Optimal control of combined antiretroviral therapies in an HIV infection model with cure rate and fusion effect

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International Journal of Biomathematics 2023年第1期16卷 29-51页

作者： Bhagya Jyoti Nath Kaushik Dehingia Khadijeh Sadri hemanta kumar Sarmah Kamyar Hosseini Choonkil Park Department of Mathematics Barnagar College Sorbhog 781317BarpetaAssamIndia Department of Mathematics Sonari College Sonari 785690CharaideoAssamIndia Department of Mathematics Rasht Branch Islamic Azad UniversityRashtIran Department of Mathematics Gauhati University Guwahati781014AssamIndia Department of Mathematics Near East University TRNC Mersin10Turkey Research Institute for Natural Sciences Hanyang University Seoul 04763South Korea

This paper mainly targets to deduce an optimal treatment strategy for combined antiretroviral drugs,which can maximize healthy CD4^(+)T cells level with minimum side effects and *** this purpose,we consider a within-host treatment model for the HIV infection with two controls incorporating full logistic proliferation of healthy CD4^(+)T cells,cure rate and fusion *** two controls represent the effects of reverse transcriptase inhibitors(RTIs)and protease inhibitors(PIs),*** model analysis begins with proving different basic properties like non-negativity,boundedness of the model solutions and calculation of the basic reproduction number of the model under ***,stability results are obtained for HIV infection-free equilibrium point and also,a critical efficacy for the combined therapies is *** that,the optimal control problem is proposed and solved numerically using a forwardbackward iterative ***,we obtain an optimal treatment strategy that can maximize healthy CD4^(+)T cells count and control the viral load,and HIV-infected CD4^(+)T cells count to an undetectable level resulting in improved health conditions of infected individuals.

关键词： HIV infection antiretroviral drugs critical efficacy optimal control Pontryagin's maximum principle.

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