Vignan University

About: Vignan University is a education organization based out in Guntur, Andhra Pradesh, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.

Nonlinear Integrity Algorithm for Blockchain Based Supply Chain Databases

Abstract: With an ever-growing global supply chain, supply chain management(SCM) is becoming more complex and competitive because of continuous development in global supply chain. In recent years, the blockchain has grown with the promise of becoming a “ trust machine “. However, this technological innovation can foster trust and transparency in many other sectors. In the industrial sector, for example, it could have interesting applications in production ecosystems and in particular in improving supply chain performance, offering the opportunity to increase speed and quality with potential cost savings ranging from 12 to 50%. the computation power required to setup and maintain a blockchain is expensive because of Computing hash for each block added to the blockchain and validating blocks. In this paper we proposed a nonlinear Integrity algorithm which works efficiently in terms of run-time and hash-bit variation with dynamic hash size and data size when compared it with traditional hashing algorithms like whirlpool, SHA, MD5.

Optimization of the Isolation Procedure of Genomic DNA from a Mucus Laden Pulmonate Gastropod, Achatina fulica

Abstract: Genomic DNA of good quality is a prerequisite in molecular biology studies involved in deciphering the information contained in the molecules that are chosen for studying the evolutionary interrelationships among taxa. Genomic DNA should be free of contaminants which may otherwise interfere while performing PCR. This is particularly essential while isolating genomic DNA from gastropods due to the presence of large amounts of mucopolysaccharides in their tissues. In the present study, we have developed a new method for obtaining high quality genomic DNA from a pulmonate snail Achatina fulica, which secretes a large amount of mucus. In this method, we have obtained good quality genomic DNA, compatible for downstream molecular biology applications like PCR and sequencing of 16S rDNA. The yield of the genomic DNA was 2790 µg/ml. This method may be extended for isolating high quality genomic DNA from different gastropods native to Indian sub-continent, which serves as a starting point for studying their phylogenetic affinities.

Analysis and Design of High Speed Residue to Binary Reverse Converter for the Moduli Set {2n+ 1, 2n,2n-1}

Abstract: Residue Number System (RNS) has the specific feature to perform addition, subtraction independently with carry-free propagation In RNS, conversion is of two types: Forward Conversion and Reverse Conversion Chinese Remainder Theorem (CRT) and Mixed Radix Conversion (MRC) are the two extensively used techniques adapted for reverse conversion and in this case, CRT is proved faster than MRC This paper proposes a residue to binary reverse converter for three moduli set {2n+ 1, 2n, 2n- 1} by modifying the CRT It is simplified in order to design a reverse converter that does not require modular operations The operations required in the existing designs are mod (2n) mod (2n – 1) and mod (2n – 1) operations The proposed design provides better results in terms of power, area, delay and number of cells over the existing CRT design and does not require mod operations which are however necessary in the existing CRT technique This design has been simulated using NC Launch - Encounter tool in Cadence

Security Issues in Cognitive Radio: A Review

Abstract: Electromagnetic spectrum is a scarce, important and a very useful resource. However, this resource has not been utilized effectively or in other words most of the spectrum remains vacant. Due to fixed or licensed spectrum allocation the spectrum remains vacant for a considerable amount of time. Cognitive radio, a wireless and an intelligent technology was proposed by Joseph Mitola to make efficient use of spectrum. The use of EM wave as a transmission medium makes security a major concern in Cognitive Radio as these are easily susceptible to attacks. Also, being a flexible wireless network technology it is susceptible to traditional threats as well as unique attacks which will have an adverse effects on its performance. This paper introduces the Cognitive Radio technology and mainly focuses on security issues related to it. Further, we present a layered classification of security issues of this exciting area of communication technology.