Enhanced OLSR for Defense against DOS Attack in Ad Hoc Networks

Mohanapriya Marimuthu,Ilango Krishnamurthi 한국통신학회 2013 Journal of communications and networks Vol.15 No.1

Mobile ad hoc networks (MANET) refers to a network designed for special applications for which it is difficult to use a backbone network. In MANETs, applications are mostly involved with sensitive and secret information. Since MANET assumes a trusted environment for routing, security is a major issue. In this paper we analyze the vulnerabilities of a pro-active routing protocol called optimized link state routing (OLSR) against a specific type of denial-of-service (DOS) attack called node isolation attack. Analyzing the attack, we propose a mechanism called enhanced OLSR (EOLSR) protocol which is a trust based technique to secure the OLSR nodes against the attack. Our technique is capable of finding whether a node is advertising correct topology information or not by verifying its Hello packets, thus detecting node isolation attacks. The experiment results show that our protocol is able to achieve routing security with 45% increase in packet delivery ratio and 44% reduction in packet loss rate when compared to standard OLSR under node isolation attack. Our technique is light weight because it doesn’t involve high computational complexity for securing the network.

A generalized approach of fractional Fourier transform to stability of fractional differential equation

Arusamy Mohanapriya,Varudaraj Sivakumar,Periasamy Prakash 강원경기수학회 2021 한국수학논문집 Vol.29 No.4

This research article deals with the Mittag-Leffler-Hyers-Ulam stability of linear and impulsive fractional order differential equation which involves the Caputo derivative. The application of the generalized fractional Fourier transform method and fixed point theorem, evaluates the existence, uniqueness and stability of solution that are acquired for the proposed non-linear problems on Lizorkin space. Finally, examples are introduced to validate the outcomes of main result.

Theoretical and Experimental Studies on the Adsorption of N-[(E)-Pyridin-2-ylmethylidene] Aniline, a Schiff Base, on Mild Steel Surface in Acid Media

N, Mohanapriya.,M, Kumaravel.,B, Lalithamani. The Korean Electrochemical Society 2020 Journal of electrochemical science and technology Vol.11 No.2

The adsorption of N-[(E)-Pyridin-2-ylmethylidene] aniline, a Schiff base, on to mild steel surface in 1M HCl and 0.5 M H₂SO₄ solutions and the consequent corrosion protection were studied employing weight loss method, electrochemical impedance spectroscopy and potentiodynamic polarization measurements. DFT calculations were performed to investigate its interaction with the metal surface at the atomic level to understand its inhibition mechanism. The adsorption process is well described by the Langmuir isotherm. The thermodynamic parameters indicated that the adsorption is spontaneous and the interaction of the inhibitor at the mild steel surface is mainly through physisorption. The R_a values obtained in AFM studies for the uninhibited and inhibited sample in HCl media respectively are 0.756 and 0.559 ㎛, and that in H₂SO₄ media are 0.411 and 0.406 ㎛. The lesser roughness values of the inhibited sample shows the adsorption of the molecules onto the mild surface. The inhibition efficiencies were found to improve with concentration of the inhibitor and the maximum efficiency was observed at 400ppm in all the investigation methods adopted. The inhibitor was found to exhibit a higher efficiency in HCl media (95.7%) than in H₂SO₄ (92.8%). The theoretical and experimental results are found to be in good agreement.

Enhanced OLSR for Defense against DOS Attack in Ad Hoc Networks

Marimuthu, Mohanapriya,Krishnamurthi, Ilango The Korea Institute of Information and Commucation 2013 Journal of communications and networks Vol.15 No.1

Mobile ad hoc networks (MANET) refers to a network designed for special applications for which it is difficult to use a backbone network. In MANETs, applications are mostly involved with sensitive and secret information. Since MANET assumes a trusted environment for routing, security is a major issue. In this paper we analyze the vulnerabilities of a pro-active routing protocol called optimized link state routing (OLSR) against a specific type of denial-of-service (DOS) attack called node isolation attack. Analyzing the attack, we propose a mechanism called enhanced OLSR (EOLSR) protocol which is a trust based technique to secure the OLSR nodes against the attack. Our technique is capable of finding whether a node is advertising correct topology information or not by verifying its Hello packets, thus detecting node isolation attacks. The experiment results show that our protocol is able to achieve routing security with 45% increase in packet delivery ratio and 44% reduction in packet loss rate when compared to standard OLSR under node isolation attack. Our technique is light weight because it doesn't involve high computational complexity for securing the network.

EID estimator-based modified repetitive control for singular systems with time-varying delay

Sakthivel, R.,Mohanapriya, S.,Selvaraj, P.,Karimi, H. R.,Marshal Anthoni, S. Springer Science + Business Media 2017 Nonlinear dynamics Vol.89 No.2

<P>This paper investigates the disturbance rejection for a modified repetitive control system (MRCS) that is described by a class of linear singular systems in the presence of external disturbances and time-varying delay. In particular, an equivalent-input-disturbance (EID)-based estimator is included in the MRCS to compensate both periodic and aperiodic disturbances which yields an EID-based MRCS. More precisely, the incorporation of the EID-based estimator into the control input enables rejection of all types of disturbances in MRCS and tracking of a periodic reference input is archived via a repetitive controller. Attention is focused on the state-feedback repetitive controller design which not only guarantees the regular, impulse free, and asymptotic stability of the closed-loop singular MRCS, but also provides an optimized upper bound of the time-varying delay. Based on Lyapunov stability theory and utilizing some advanced mathematical techniques, a new set of delay-dependent sufficient conditions is presented in terms of linear matrix inequalities for obtaining the required result. Then, an explicit expression for the desired state-feedback repetitive control law is developed. Further, the obtained results are validated through two numerical examples in the simulation section.</P>

State Estimation and Dissipative-Based Control Design for Vehicle Lateral Dynamics With Probabilistic Faults

Sakthivel, Rathinasamy,Mohanapriya, Saminathan,Ahn, Choon Ki,Selvaraj, Palanisamy Institute of Electrical and Electronics Engineers 2018 IEEE transactions on industrial electronics Vol.65 No.9

<P>In this paper, the state estimation problem is studied for vehicle lateral dynamics, which are approximated by the Takagi–Sugeno (T–S) fuzzy model with probabilistic actuator faults. First, a fuzzy rule-based state estimator is constructed to estimate the exact state values of the considered system, and then a probability-dependent fault-tolerant state feedback controller is developed based on the estimated state values. Furthermore, by constructing an appropriate Lyapunov–Krasovskii functional, some novel delay-dependent sufficient conditions that ensure the mean-square asymptotic stability and strict <TEX>$(Q_d,S_d,R_d)$</TEX>-dissipativity of the closed-loop fuzzy system are derived. Specifically, the proposed dissipative-based observer design scheme is developed by means of a set of linear matrix inequalities. Finally, the proposed state estimation and fault-tolerant dissipative controller are applied to the addressed system, which demonstrates the usefulness of the developed analytical results.</P>

A Robust Repetitive-Control Design for a Class of Uncertain Stochastic Dynamical Systems

Sakthivel, R.,Mohanapriya, S.,Karimi, H. R.,Selvaraj, P. IEEE 2017 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS PART 2 E Vol.64 No.4

<P>In this brief, we study the problem of output tracking for continuous-time stochastic dynamical systems with parametric uncertainties and aperiodic disturbances by using a modified repetitive controller (MRC). More precisely, the MRC is obtained based on the equivalent input disturbance (EID) technique such that the closed-loop modified repetitive-control system is asymptotically stable in the presence of uncertainties and aperiodic disturbances. The main advantage of the proposed controller is that it can incorporate an EID estimator, which estimates and eliminates disturbances in the repetitive-control systems. Finally, simulation is conducted to reveal that the proposed controller can effectively reject the aperiodic disturbance, reduce the stochastic noise, and track the reference signal without steady-state error.</P>

On r-dynamic coloring on Mycielskian graphs

GOMATHI C S,MOHANAPRIYA N 장전수학회 2022 Proceedings of the Jangjeon mathematical society Vol.25 No.2

Mycielski graphs are based on transformation from a graph G to a new graph, say μ(G). It is well known that these graphs have same clique number as in the graph G, but the chromatic number is defined as χ(μ(G))=χ(G)+1. The Mycielskian graph G is denoted as μ(G). These Mycielski graphs are colored using r- dynamic coloring which is an proper vertex k-coloring and defined as |c(Neigh(v))|≥min {r, degG(v)}, for each v∈V(G). It is denoted by χr(G). The r-dynamic chormatic number of a graph G is the minutest coloring k of G which is r-dynamic k-colorable. In this paper, the authors investigated the r-coloring of Mycielskian graph of Double Fan graph μ(F2,n), Friendship graph μ(Fn), Pan graph μ(Pn) and Cocktail party graph μ(CPn).

Relevance’s of using E-Learning Systems & Technology in INDIA : Tutoring Practice

M. R. M. VeeraManickam,M. Mohanapriya,Debnath Bhattacharyya 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.8

Traditional classroom teaching and learning processes are not in full-fledged utilizing latest new technology for teaching learning system at various college levels which in high demand. This article describe valuable concept to get awareness to the principal governing educational sector in India to the vital need of shifting from traditional system to an e-learning practice system using Data centers deployments and latest technology. In advance it focuses on significance necessity of infrastructure which is high demand to use in educational institute to improve effectiveness and value of teaching and learning process through e-learning. Major issues are in Indian Educational Sector is e-learning system decentralized model and proposed model provides solution for centralized system features and illustrate its importance of Cloud Datacenter model-Dac and its significances.

Multifunctional nanofiber membrane with anti-ultraviolet and thermal regulation fabricated by coaxial electrospinning

Shuoshuo Wang,Wubin Chen,Lina Wang,Juming Yao,Guocheng Zhu,Baochun Guo,Jiri Militky,Mohanapriya Venkataraman,MING ZHANG 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-

Ultraviolet radiation is extremely harmful to humans and often occurs in high-temperature weather. Thedevelopment of intelligent textiles based on UV protection and thermal regulation is paramount. In thisresearch, we use coaxial electrospinning technology to prepare anti-ultraviolet smart thermo-regulatingnanofiber membranes. The zinc oxide (ZnO) and octadecane were incorporated into nanofibers with thepolyacrylonitrile (PAN)/ZnO as sheath and the octadecane as core successfully. The composite nanofibershave excellent comprehensive properties, the highest melting enthalpy is 111.38 J/g, and the UPF value is86.21. This multifunctional nanofiber membrane has broad prospects in outdoor products, electroniccomponent protection, and military products.