Bøger af Sumit Bhardwaj

Due to their excellent magnetic characteristics, hard ferrites have many high-tech applications in such areas as permanent magnets, storage devices, HF Antenna and Spin Transmission. The present book reviews the present knowledge of these materials; their processing, characterization and potential applications. The book is also useful as an introductory text for students at the postgraduate research level.Keywords: Hard Ferrites, Synthesis, BaFe12O19, SrFe12O19, Magnetization, Miniaturization, EMI Shielding, Ferrofluids, Nanomaterials, Nano-Floating Gate, Permanent Magnets, Recording Media, High-Frequency Antenna, Radar Applications, Memory Devices. Spin Transmission, Spinel Model, Synthesis Methods.

With no dwindling in the use of wireless communication and a corresponding speedy proliferation of research in mobile technology, Mobile Adhoc Network (MANET) have been widely used for various applications such as military crisis operations and emergency rescue operations. The infrastructure-less nature and the dynamic topology features of MANET makes these networks highly vulnerable to various security issues like exploiting vulnerabilities of routing protocols and injecting harmful packets in the network etc. These threats deteriorate causes severe damage to the network. The challenge is how to prevent these security threats in MANETs. Based on AODV protocol, propose a detection scheme called the Cooperative Detection Scheme (CDS), which aims at detecting and preventing affected nodes launching gray hole/collaborative black hole attacks in MANETs.

Derail being the second biggest problem in our country, India, thus prepare crash and mischance, is one of the significant concerns. We must Prepare beforehand for the mishappenings due to human errors or mechanical error in trains, in tracks, or in the signal framework. Major and expensive accidents happen because of head-on crash of trains running on a similar track towards each other and if train is on wrong track. More than 85 accidents occurred from 1980 to 2011 in India. In most recent two years more than 27 accidents occurred in India. A few plans have been proposed by analysts in the past to distinguish the danger of conceivable impact and to take preventive measures. This project introduces the advancement of a framework to stay away from accident causes due to Derail caused by obstacles limiting the visibility of the signal, which at pole or obstruction on track and also of train is on wrong track will alert the driver using ultrasonic sensor RFID tag utilizing Radio frequency .i.e. rf module. Track checking instrument utilizes code and controlled by atmega chip and gives the output of the project.