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Sarvabhatla M.,N.B.K.R IST | Reddy M.C.M.,Vel Technology Technical University | Narayana K.L.,SITAMS | Vorugunti C.S.,Dhirubhai Ambani Institute of ICT
Advances in Intelligent Systems and Computing

Due to the intense evolution of IoT (Internet of Things) technology, in which currency notes to bicycles will form a vital part of Internet to exchange their information among the surrounding environments. IoT will definitely consequences in an augmented level of users connecting to the remote servers (via insecure public internet). Connecting through less resource and portable devices requires a light weight, identity preserving and highly secured key agreement and authentication mechanism. In this framework, recently Mishra et al. proposed an anonymity preserving biometric based authentication scheme and claimed that their scheme resists all major cryptographic attacks. In this, manuscript we will demonstrate that, on thorough analysis, Mishra et al. scheme is liable to ‘Forward Secrecy’ attack and based on that, the attacker can realize all key attacks. As a part of our contribution, we will propose a light weight, strongly secure user authentication and key agreement scheme which is best outfits for IoT environment. © Springer Science+Business Media Singapore 2016. Source

Dhal P.K.,Vel Technology Technical University | Asir Rajan C.C.,Pondicherry Engineering College
Journal of Engineering Science and Technology Review

This paper presents a special gating pattern swapping technique for cascaded multilevel inverter, which is used for STATCOM. By using this technique besides minimizing the harmonic level, the inverter unit fundamental output voltages are equalized. Therefore, all the inverter units in each phase leg can equally share the exchanged active and reactive power with the utility grid. This greatly helps the dc-link voltages balancing control. PI Control is employed for improving performance. Fuzzy control is employed to the system for enhancing transient stability. The performance is analyzed using digital simulation. © 2010 Kavala Institute of Technology. Source

Sageengrana S.,HIGH-TECH | Ponnaruvi P.,HIGH-TECH | Tamilmani G.,Vel Technology Technical University
International Journal of Applied Engineering Research

The size of the databases used in today’s enterprises has been growing at exponential rates day by day. Simultaneously, the need to process and analyze the large volumes of data for business decision making has also increased. Storing a lot of content in the cloud extends waiting time and increases search time. Distributed file systems (Hadoop) are key building blocks for cloud computing applications based on the Map Reduce programming paradigm. It efficiently solves this problem. In this paper proposes an efficient content storage and retrieval based on keyword ranking and BIDD(Bitmap Index Database Design) technique in distributed environment. Proposed keyword ranking first extract nouns than give ranks for each extracted noun. BIDD techniques based on bitmap representations are known to improve query response time in a large environment. Hbase (database) of Hadoop is used to store the large content. This paper reports the experimental work on large content storage and its optimal solution using Hadoop database, Hadoop Distributed File System (HDFS) for storage and using parallel processing to process large data sets using Map Reduce programming framework. © Research India Publications. Source

Siva Kumar B.,Vel Technology Technical University | Haranadha Reddy Y.,Sri Venkateswara University
Der Pharma Chemica

A new class of organophosphorus heterocycles, tricyclic phosphoranes (4a-j) synthesis was accomplished via two step process. It involves the preparation of monochloride intermediate (2) and its subsequent reaction with various phenols in dry tetrahydrofuran in the presence of TEA under reflux condition. These compounds were characterized by IR, 1H, 13C and 31P NMR and were found to exhibit moderate to good antimicrobial activity. Source

Prakash N.,Thangavelu Engineering College | Latha S.,SRM University | Sudha P.N.,D K M College for Women | Renganathan N.G.,Vel Technology Technical University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry

Chitosan and polyethylene glycol (PEG) were crosslinked with glutaraldehyde to form a blend in the ratio 1:1. The synthesized blend was characterized by FTIR, XRD, TGA/DTA, and DSC to confirm grafting and crosslinking reactions, and scanning electron microscopy to understand the surface morphology. The prepared blend was employed for the removal of metals from dyeing industry effluent. The optimum conditions arrived at for the removal of chromium from dyeing industrial effluent are as follows: pH 5, contact time 4 h, adsorbate dosage is 3 g/L. Kinetic studies and adsorption studies were also carried out to evaluate the adsorption parameters. © 2016 Copyright © Taylor & Francis Group, LLC. Source

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