National Institute of Technology, Meghalaya

About: National Institute of Technology, Meghalaya is a education organization based out in Shillong, India. It is known for research contribution in the topics: Control theory & Electric power system. The organization has 503 authors who have published 1062 publications receiving 6818 citations. The organization is also known as: NIT Meghalaya & NITM.

Image steganography using advanced encryption standard for implantation of audio/video data

Abstract: In this article, an advanced image steganographic technique is proposed which may carry large information like audio and video file. It exploits the merit of Advanced Encryption Standard (AES) algorithm which basically generates random pixel position. Here, information become more secure because the algorithm selects the position randomly using AES as well as decide the size of Least Significant Bits for embedding information dynamically. Experiments are conducted to embed audio and video file into a gray scale as well as color images, and results are compared with four state-of-the-art methods, both qualitatively and quantitatively to demonstrate the effectiveness of the proposed method.

SMITE: an SDN and MPLS integrated traceback mechanism

Abstract: In this paper we present a new approach to IP packet traceback called SMITE which allows efficient traceback of the origin of a packet with incorrect or spoofed source addresses through an integration of software-defined networks (SDN) [15] and Multiprotocol Label Switching (MPLS) [13] in OpenFlow [19]. SMITE leverages the flexibility of SDN and the strength of MPLS network to achieve low false positive rate, ability to perform post-mortem traceback, reduction in storage pressure/ hardware investment and most importantly the ability to perform traceback for a single spoofed packet. SMITE also aims to overcome the difficulties and limitations of legacy traceback mechanisms.

Electrical properties of interdigitated partially bent like shaped liquid crystalline compound

Abstract: This article represents the electrical studies of an interdigitated highly skewed N(4-n-pentyloxybenzylidene) 4-n-alkylaniline (5O.16) compound. Interestingly the compound is partially bent like and unsymmetrical in alkyl chain length. Dielectric and impedance spectroscopy studies indicate the coupling between the liquid crystal and the electrical field. Studies were carried out as a function of temperature as well as frequency. Semicircular nature of the Cole–Cole plots indicates the reorientation of the molecule with the applied field. Using the experimental data and the theoretically fitted results the effective equivalent model circuit was designed. Which used to explain the behavior of the compound under the external electric effect and the influence of the electrodes with different variable represent the resistor circuit. However, the effect of the conductivity of temperature and frequency are also reported.

Memristor-based novel 4D chaotic system without equilibria: Analysis and projective synchronization

Abstract: This chapter puts forward the analysis of a novel memristor-based four dimensional (4D) chaotic system without equilibria and its projective synchronization using nonlinear active control technique. The proposed memristor-based novel 4D chaotic system has total nine terms with two nonlinear terms. Different qualitative and quantitative tools: time series, phase plane, Lyapunov exponents, bifurcation diagram, Lyapunov dimension, Poincare map are used to analyze the proposed memristor-based system. The proposed system has periodic, 2-torus quasi-periodic, chaotic, and chaotic 2-torus attractors, which are confirmed with the calculation of the system's Lyapunov exponents and bifurcation diagram. The proposed chaotic system has thumb and parachute shapes of Poincare map and satisfy unique and interesting behaviors. Such a memristor-based dissipative chaotic system is not available in the literature. Furthermore, the projective synchronization between memristor-based novel chaotic systems is achieved. The nonlinear active control laws are designed by using the sum of relevant variables of the systems and required global asymptotic stability condition is derived to achieve synchronization. Results are simulated in MATLAB environment and reflect that objectives are achieved successfully.