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.

Design and implementation of low complexity circularly symmetric 2D FIR filter architectures

Abstract: This paper presents a low complexity two dimensional (2D) circular symmetric Finite Impulse Response (FIR) filter design and implementation of architecture. The optimized circular symmetric 2D FIR filter is designed using a modified Park–McClellan transformation method and filter coefficients are quantized using a canonical signed digit (CSD) binary number format. The CSD encoded coefficients are optimized to reduce the number of adder/subtractors using common subexpression elimination (CSE) algorithms. Based on the modified filter coefficients, the two structures fully direct form and hybrid-II form 2D FIR filter architectures are implemented using CSD and CSD with Horizontal CSE and Vertical CSE techniques. The proposed architectures compared with the conventional symmetry 2D filters and state-of-the-art architectures in terms of area, power, and speed.

Fibrous Filter to Protect Building Environments from Polluting Agents: A Review

Abstract: This paper discusses the use of fibrous filter to protect the building environments from air born polluting agents and especially of concern chemical, biological and radiological agents. Air-filtration includes removal of particulate from air and toxic gases from air. In air filtration, particulate which are mostly biological and radioactive types of agents can be removed by using mechanical and electrostatic filters. Some biological agents, which cannot be removed by air filtration alone, special techniques like antimicrobial finish, UV germicides, coated filters etc. are required. Biocide agent can be added into the fibre itself by grafting reaction to impart antimicrobial activity. Chemical agents like toxic gases can be removed by integrating adsorbents and sorbents in filters or by fibre modifications. It is also possible to impart catalytic conversion properties into the fibre to remove volatile gasous. Radioactive agents can be removed by particulate filter if present in the form of aerosol or by gas cleaning by the use of specific fibre impregnate.

Parallel processing of enhanced K-means using OpenMP

Abstract: Cluster Analysis plays a vital responsibility in scientific investigation and business applications. K-Means clustering algorithm is broadly used as a partitioning technique. K-Means clustering algorithm is not much suitable for huge voluminous of data sets. Iterative clustering with K-Means has more Execution time. To avoid such, A Parallel Partitioning of enhanced K-Means algorithm using OpenMP is proposed to handle the outliers with optimized execution time without affecting the accuracy. The experiments are performed on diabetes, soya beans and supermarket by considering multi-core systems with 768, 683 and 4627 instances respectively. The proposed method outperforms with an accuracy of 74.76% for diabetes dataset with an execution time of 56secs, soya beans datasets with an accuracy of 82.34% with an execution time 54secs and supermarket datasets with an accuracy of 80.45% with 54secs of execution time.

Development of Biocomposites from Agro Wastes for Low Dielectric Applications

Abstract: The present work is attempting to synthesize and characterizations of a novel carbazole core containing cardanol based benzoxazine monomer from carbazole core containing aromatic diamine, cardanol and paraformaldehyde. In addition, carbazole core containing cardanol based benzoxazine polymer and various weight percentages of amine functionalized rice husk ash incorporated carbazole core containing cardanol based polybenzoxazine composites were prepared. The prepared polymer and its composites were characterized by FTIR, XRD, DSC, TGA and dielectric studies. The various studies confirm that the composites show increased Tg, higher char yield and better thermal stability compared to carbazole core containing cardanol based benzoxazine polymer. In addition to that the composites show significant decrease in the dielectric constant values than the neat cardanol based polybenzoxazine. The surface morphology and the distribution of rice husk ash in carbazole core containing cardanol based polybenzoxazine composites are confirmed by SEM and TEM analysis. Hence, the present study has attempted to prepared eco-friendly value added carbazole core containing cardanol based polybenzoxazine products for low dielectric constant applications by making use of biowaste for both matrix and reinforcement preparation to form biowaste based composites. Schematic representation for the preparation of carbazole core containing cardanol based benzoxazine monomer, polybenzoxazine and biobased polybenzoxazine composites

Design, synthesis of novel oxazolidino-amides/sulfonamides conjugates and their impact on antibacterial activity

Abstract: In view of generating new compounds for future drug development, we have synthesized oxazolidinones library of aryl amides and aryl sulfonamide derivatives These compounds were screened in vitro against panel of susceptible and resistant Gram-positive (Staphylococcus aureus and Bacillus subtilis), Gram-negative bacteria (Pseudomonas aeruginosa), fungi (Candida albicans) strains, and Mycobacterium tuberculosis (Mtb) Among them, 10d and 11a compounds have been evaluated against 12 fungal strains and have displayed significant antimycotic activities approximately 37 folds more potent than fluconazole