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: Control theory & CMOS. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.

A series-form solution of the coupled nonlinear equations by the method of directly defined inverse mapping and SRM

Abstract: We derive a series-form solution of the coupled nonlinear equations by the method of directly defined inverse mapping (MDDIM) and spectral relaxation method (SRM). Then, via the method of directly ...

An advanced approach for Smart Parking Solution Based on Ethereum Block chain System

Abstract: In the past few years, the use of the internet and mobile applications has rapidly increased. People use them for all of their needs, from online shopping to online bank transactions. With such enormous use, there comes a high risk of this data getting hacked and/or misused. Such attacks are quite common with applications that use a centralized server. Such shortcomings of centralized servers can be overcome by using decentralized networks like the block chain. Through this paper, I propose a solution that would help solve the problem of finding a parking lot for your vehicles. This solution has been created with the use of the Ethereum block chain (a distributed computing platform that is based on blockchain), and with the use of smart contracts. [1] This application is designed to provide an efficient way to further utilize the private parking spaces available in urban cities. It provides both the owners of parking lots and those who are in search of parking lots (in urban areas), a platform where they can exchange these resources. In the application, sellers lease out their parking lots while buyers book the parking lots.

Two Rail-To-Rail Class-AB CMOS Buffers with High Performance Slew Rate and Delay

Abstract: Two rail-to-rail class-AB buffers with high driving capability and high speed are presented. One circuit uses two complementary differential flipped voltage follower (DFVF) transconductor circuits and other circuit uses two complementary differential flipped voltage follower transconductors with current sensing transistor. These proposed class-AB buffers are boosted by a pair of adaptive biasing circuit's using current sink and current source. The proposed buffers have exhibited high slew rate than the previous circuits. The circuits are implemented and the results analyzed using Cadence software in 0.18 µm CMOS technology.

Polyurethane Nanostructures for Drug Delivery Applications

Abstract: Polymers have been considered as important materials in fabrication of biomedical devices for various medical purposes including drug delivery. Among the suggested polymers, polyurethane (PU) is widely used as biomaterials due to their excellent biocompatibility and physico-mechanical properties. PU contributes in a number of technological applications, such as appliances, clothing, automobile parts, shoe soles, flexible and rigid foams, waterproofing compounds, and surface coatings. The unique combination of biocompatibility with excellent mechanical properties enabled this class of materials to find innumerable applications in the medical field. Examples include cardiovascular applications, reconstructive surgery, drug-delivery systems, and prophylactics. The present chapter gives a comprehensive review of therapeutic nanostructures of PU for drug-delivery applications. The PU technology and its emergence in the biomedical and pharmaceutical applications will be briefly touched upon. The developments in the nanostructures of PU and recent developments in controlled drug-delivery applications will be described in detail.

F, Cl, Br Doped Ge 44 and Al 22 P 22 Nanocages As Anode Electrode Materials of Li, Na, and K ion Batteries

Abstract: In this study, the potential of Ge44 and Al22P22 as anode electrodes of Li-ion, Na-ion, and K-ion batteries were investigated via density functional theory. The effect of halogen doping of Ge44 and Al22P22 on ability of metal-ion battery was examined. Obtained results shown that Al22P22 as anode electrode in metal-ion batteries has higher potential than Ge44. Calculated results shown that K-ion battery has higher cell voltage and higher performance than Li-ion and Na-ion batteries. Results display that halogen doping increase the cell voltage and performance of studied metal-ion batteries. Calculated results indicated that F‑doped metal-ion batteries have higher cell voltage and higher performance than Cl- and Br-doped metal-ion batteries. Finally it can be concluded that F-doped Al21P22 as anode electrode in K-ion battery has the highest performance.