Motilal Nehru National Institute of Technology Allahabad

About: Motilal Nehru National Institute of Technology Allahabad is a education organization based out in Allahabad, Uttar Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 2475 authors who have published 5067 publications receiving 61891 citations. The organization is also known as: NIT Allahabad & Motilal Nehru Regional Engineering College.

Digital Image Watermarking: Techniques and Emerging Applications

Abstract: Recently, with the explosive growth of Information and Communication Technologies (ICT), various new opportunities emerged for the creation and delivery of content in digital form which includes applications such as real time video and audio delivery, electronic advertising, digital libraries and web publishing. However, these advantages have the consequent risks of data piracy, which motivate towards development of new protection mechanisms. One such effort that has been attracting interest is based on digital watermarking techniques. This chapter discusses the basic concepts of digital watermarking techniques, performances parameters and its potential applications in various fields. In this chapter, we also discuss various spatial and transform domain techniques and compare the performance of some reported wavelet based watermarking techniques. Finally, the latest applications of watermarking techniques have been discussed. This chapter will be more important for researchers to implement effective watermarking method.

Influence of Dzyaloshinshkii---Moriya interaction on quantum correlations in two-qubit Werner states and MEMS

Abstract: In this paper, we study the influence of Dzyaloshinskii---Moriya (DM) interaction on quantum correlations in two-qubit Werner states and maximally entangled mixed states (MEMS). We consider our system as a closed system of a qubit pair and one auxiliary qubit, which interact with any one of the qubit of the pair through DM interaction. We show that DM interaction, taken along any direction (x or y or z), does not affect two-qubit Werner states. On the other hand, the MEMS are affected by x and z components of DM interaction and remain unaffected by the y component. Further, we find that the state (i.e., probability amplitude) of auxiliary qubit does not affect the quantum correlations in both the states, and only DM interaction strength influences the quantum correlations. So one can avoid the intention to prepare the specific state of auxiliary qubit to manipulate the quantum correlations in both the states. We mention here that avoiding the preparation of state can contribute to cost reduction in quantum information processing. We also observe the phenomenon of entanglement sudden death in the present study.