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.

Energy efficient cooperative CRN spectrum sharing using multi-level hierarchical clustering with MCDM

Abstract: Spectrum sensing is playing a vital role in cognitive radio networks (CRN). In cooperative sensing model, energy, task assignment and free channel allocation for requested CRs mostly varies based on location of CR from cluster head. Since heterogeneous CR users are participating in the cooperation, their willingness, battery power and sensing accuracy are to be considered for CR's weight calculation. Otherwise overall sensing results trustworthiness and performance of sensing task may be degraded. Using multi criteria decision making (MCDM) scheme we have calculated each node weight and given that as input to multi-level hierarchical clustering technique. Based on the traffic of each blocks, sensing task will be allocated to a cluster. In MCDM, we derived the weight by using combination of modified analytical hierarchical process (MAHP) for giving weight for attributes of each CR and VIKOR. Final result shows that increased average lifetime of each participating nodes in the simulation.

Simple-Link Sensor Network-Based Remote Monitoring of Multiple Patients

Abstract: The deployment of a simple-link sensor network-based physiological signal remote monitoring system is presented in this chapter. The proposed system consists of a Wireless Portable Sensor Unit (WPSU), which is installed at the patient’s home and measures the physiological signals and sends these to the remote monitoring station (i.e., at a hospital) through a wireless access point unit (home router). The received data of every patient is stored in the database server for review. Significant experiments have been carried out to evaluate the current consumption, life expectancy, and movement of a patient in an environment. From the experiments, it is observed that the current consumption and life expectancy of a WPSU has been found as 0.01529 A and two days 17 hours 24 minutes, respectively. Also, it is evaluated that the maximum mobility of a WPSU in an environment is 119-m line of sight from the wireless access point.

Artificial Intelligence to Analyze the Performance of the Ceramic-Coated Diesel Engine Using Digital Filter Optimization

Abstract: The completeness of oil goods activates the barriers of lack of goods, inequality in the society, and surroundings impoverishment. Avoiding their use overnight and switching to clean electric motors are a challenge. Under all these conditions, researchers can launch their research on alternative fuels for a preeminent solution. Oxygenated fuel additives and thermal barrier coating (TBC) applications are essential to decrease the emission levels of exhaust and improve the performance of the vehicle. The main objective of this research is to analyze the performance of the ceramic-coated diesel engine. The ceramic particles use polymer coating to enhance the functionality and durability. Optimum outcomes are determined using Taguchi method. The impacts of various casting parameters of composites have been examined in detail. PSO-GA (Particle Swarm Optimization and Genetic Algorithm) is utilized to analyze the performance. Using an artificial neural network (ANN), the performance of diesel engine is examined to reduce time, cost, and experimental repetition. Thus, by using the artificial intelligence, the performance of the ceramic-coated diesel engine is analyzed and the polymeric substance and condition in coating ceramic engine is discussed.

IOT Based Smart Dustbin Monitoring With Tracking System Using ATMega 2560 Microcontroller

Abstract: India is rapidly developing country in the world. As a growing economy it is important to manage its waste. In India on an average 64 million tons of detritus is produced which ranks 5th in global scenario. Now a days in many localities garbage is thrown arbitrary and roads are seen with full of litter. These unplanned things causes many problems sometimes it may cause hazardous diseases. It necessitates a management system that will curb this issue and has a complete observation on the detritus. The intention towards this paper mainly focused on the monitoring and tracking of garbage present in our ambience. In addition to that the data is sent into IOT based cloud platform for real time monitoring. After reaching the end value of garbage in the dustbin the alerts are sent directly to the municipal corporation through GSM module. If any fire occurs in the dustbin, it will get alert through buzzer.

Aerodynamic Performance of Micro Aerial Wing Structures at Low Reynolds Number

Abstract: Corrugations are folds on a surface as found on wings of dragon fly insects. Although they fly at relatively lower altitudes its wings are adapted for better aerodynamic and aero-elastic characteristics. In the present work, three airfoil geometries were studied using the 2-D panel method to evaluate the aerodynamic performance for low Reynolds number. The experiments were conducted in wind tunnel for incompressible flow regime to demonstrate the coefficients of lift drag and glide ratio at two Reynolds numbers 1.9x104 and 1.5x105 and for angles of attack ranging between 00 and 160. The panel method results have been validated using the current and existing experiment data as well as with the computational work from cited literature. A good agreement between the experimental and the panel methods were found for low angles of attack. The results showed that till 80 angle of attack higher lift coefficient and lower drag coefficient are obtainable for corrugated airfoils as compared to NACA 0010. The validation of surface pressure coefficients for all three airfoils using the panel method at 40 angles of attack was done. The contours of the non-dimensional pressure and velocity are illustrated from -100 to 200 angles of attack. A good correlation between the experiment data and the computational methods revealed that the corrugated airfoils exhibit better aerodynamic performance than NACA 0010.