Velagapudi Ramakrishna Siddhartha Engineering College

About: Velagapudi Ramakrishna Siddhartha Engineering College is a based out in . It is known for research contribution in the topics: Computer science & Antenna (radio). The organization has 1307 authors who have published 1155 publications receiving 6163 citations.

Dynamics of metallic particle contamination in a gas insulated busduct with SF 6 and N 2 gas mixtures

Abstract: It is known that breakdown strength of SF 6 is extremely susceptible to non-uniform electric fields and metallic particle contamination, these effects lead to lower the breakdown voltage. Furthermore, from the view point of environmental protection, as SF 6 has strong greenhouse effect, the use of SF 6 will be strong controlled. Thus, it is needed to develop the alternative dielectric gas or gas mixtures having better insulating characteristics and no greenhouse effect. In this paper particle movement with SF 6 and N 2 mixtures has been simulated and results have been presented in a single phase isolated conductor GIB. The results have been analyzed and presented. It is observed that 40 percent SF 6 and 60 percent N 2 gives good results, under this condition the GIS can be operated reliably.

Design of 5 Way Wide Band Wilkinson Power Divider for 6 to 18 GHz Applications

Abstract: This paper deals with the design and simulation of 5-way Wilkinson power divider for defense applications. The designed power divider is having a bandwidth of 12 GHz from 6 GHz to 18 GHz frequency range with isolation below −15 dB. In the design, a $95\ \text{mm} \times 95\ \text{mm} \times 0.8\ \text{mm}$ size RT duroid 5880 substrate with relative permittivity of 2.2 and loss tangent of 0.0004 is utilized. Multiple sections of equal power split and unequal power split Wilkinson power divider blocks are utilized in this design to achieve wide bandwidth operation. The design and analysis are carried out using Keysight ADS software package and detailed performance parameters such as return loss, isolation, insertion loss and phase plots have been discussed in detail.

Development of thermodynamic and reaction kinetic data on BaCl2-NH3 system with and without expanded natural graphite

Abstract: BaCl2 as sorbent in ammonia-based solid sorption refrigeration systems offers advantage due to its lower heat of reaction. This article presents the experimentally obtained material, thermodynamic and kinetic properties of BaCl2 and BaCl2/expanded natural graphite composites suitable for refrigeration. Values of enthalpy and entropy of reaction of BaCl2 obtained from the present study compare favorably with the literature reported values. Results showed that the reaction enthalpy and entropy of BaCl2/expanded natural graphite are lower than that of pure BaCl2. Using the measured reaction rate data and regression analysis, values of relevant kinetic coefficients for absorption and desorption are obtained for BaCl2-NH3 and BaCl2-expanded natural graphite-NH3. BaCl2-expanded natural graphite is seen to offer favorable properties in terms of lower enthalpy of reaction and better kinetics. It is expected that this study which demonstrates the influence of additives on thermodynamic and reaction kinetics is use...

A Powerful Artificial Intelligence-Based Authentication Mechanism of Retina Template Using Sparse Matrix Representation with High Security

Abstract: Retinal picture examination has increased adequate significance in the exploration field because of the need for infection distinguishing proof systems. Anomaly recognition utilizing these strategies is exceedingly unpredictable since these infections influence the human eye slowly. Ordinary malady distinguishing proof methods from retinal pictures are generally subject to manual mediation. A biometric format is an advanced portrayal of the special highlights that have been extricated from a biometric test and is put away in a biometric database. These layouts are then utilized as a part of the biometric verification and recognizable proof process. Maintaining the security of the biometric formats is of most extreme significance as any assault on the biometric layouts can prompt a disappointment of the biometric framework. The real test in planning a biometric security conspires that it ought to have the capacity to deal with intra-user fluctuation in the procured biometric identifiers. A powerful biometric format assurance conspire which is fit for dealing with intra-user inconstancy ought to preferably have diversity, revocability, security, performance. In this work, mechanized picture characterization frameworks with these AI procedures are created for down-to-earth applications. The picture order framework is partitioned into numerous modules, for example, highlight extraction, include choice and sickness distinguishing proof utilizing the AI-based classifiers and sparse matrix representation is used for retina template storing which uses less memory, and the template is compared with the users for accurate authentication.