Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Efficient Data Deduplication for Big Data Storage Systems

Abstract: For efficient chunking, we propose Differential Evolution (DE) based approach which is optimized Two Thresholds Two Divisors (TTTD-P) Content Defined Chunking (CDC) to reduce the number of computing operations using single dynamic optimal parameter divisor D with optimal threshold value exploiting multi-operations nature of TTTD. To reduce chunk size variance, TTTD algorithm introduces an additional backup divisor D′ that has a higher probability of finding cut points, however, adding an additional divisor decreases chunking throughput. To this end, Asymmetric Extremum (AE) significantly improves chunking throughput by using local extreme value in a variable-sized asymmetric window to overcome Rabin and TTTD boundaries shift problem, while achieving nearby same deduplication ratio (DR). Therefore, we propose DE-based TTTD-P optimized chunking to maximize chunking throughput with increased DR; and scalable bucket indexing approach reduces hash values judgment time to identify and declare redundant chunks about 16 times than Rabin CDC, 5 times than AE CDC, 1.6 times than FAST CDC on Hadoop Distributed File System (HDFS).

Design and Analysis of Triple Notched Band Uwb Band Pass Filter Using Defected Microstrip Structure (Dms)

Abstract: This paper presents design, simulation, fabrication and electrical analysis of a triple notched band UWB band pass filter. Short circuit stubs and microstrip line defected structures are used to design a triple notched band UWB filter. The proposed UWB BPF consists of five short circuited stubs of quarter wavelength attached to the feed line. The notched bands are created by introducing three U-shaped defected microstrip structures in the feed line. The proposed structure of the filter is designed, simulated on CST MSW and fabricated using conventional photolithography process. This band pass filter is designed to pass the UWB signals between 3.1 GHz to 10.6 GHz and to eliminate INSAT signal (4.6 GHz), WLAN signal (5.6 GHz) and satellite communication signal (8.0 GHz). The experimental results of this fabricated filter are compared with the simulated results and they are found to be in close agreement to each other. The Electrical equivalent circuit of this triple notched band filter is also presented in this paper and verified mathematically. This filter is compact in size and better in performance. It can be incorporated in UWB communication system to efficiently increase the interference protection from undesired signals. The physical dimension of this filter is about 30x10.5 mm2.

Power Quality Enhancement Using Unified Power Flow Controller in Standalone Grid Connected Solar PV System

Abstract: With the ever-advancing technology, our electricity consumption is taking a hike, too. To indemnify this hike, the power engineers have to ensure that the consumers get an uninterrupted power supply. Unfortunately, the conventional grid is no longer reliable to provide a continuous power supply to the consumers. So, the power industry has switched onto the new power generation sources like solar photovoltaic, wind energy systems, hydel power etc. Out of these, solar photovoltaic has proved to be the most efficient one. In this paper, we shall integrate the solar power with the conventional grid and study the effects of high solar penetration on the conventional grid. The problems which arise due to high solar penetration include load variation, voltage rise and reverse power flow. Also, the sporadic nature of solar PV makes the system a bit unstable. So, to resolve all these issues, a new FACTS device, UPFC has been used. The UPFC ameliorates the voltage profile of the system as the series converter of UPFC injects an ac bus voltage into the system. Also, during the specified switching time, the UPFC removes the power oscillations arising at the utility grid side. The model also enhances the voltage profile of the system and increases the power at the grid side. The model is simulated on MATLAB Simulink and simulation outcomes have been shown.

Wide-area measurements-based out-of-step protection system

Abstract: From time to time a sequence of unexpected and often overlapping contingencies may lead to power system angular instability and even blackouts if not addressed adequately by means of out-of-step protection system. This paper proposes the out-of-step protection system structure, which is based on generation sources electromotive forces vectors angle control. Protection system consists of several, strategically located terminals, exchanging with information in real-time by means of communication network. Protection system structure, principles of operation and implementation problems addressed in the paper, as also IEC 61850 communication standard-based implementation described.

Security in wireless sensor networks using ECC

Abstract: Wireless Sensor Networks have been an active area of research owing to its myriad range of applications. Traditional security protocols are not feasible for such networks due to their resource constraint nature. However, ECC has been considered as a viable cryptographic technique due to its low computational overhead. In this paper study and application of ECC on a popular WSN operating system, TinyOS, has been carried out. Practical implementation of the ECC operations has been performed using TinyECC library. TinyECC has been used to develop custom security protocols on TinyOS. The performance benchmarking of the proposed protocols has also been carried out. The developed protocol has been fused on the MicaZ Motes.