Dhanbād, India
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Raj S.,IIT ISM | Bhattacharyya B.,IIT ISM
2016 National Power Systems Conference, NPSC 2016 | Year: 2016

From last few decades, the frequent occurrence of the voltage collapse has attracted more and more attention. Voltage collapse is the system instability, usually, associated with the shortage of reactive power at the load end involving the entire power systems. The most effective method to counter voltage collapse is to find out the possible locations where voltage collapse may occur i.e.To find the weakest buses existing in the system. Weak bus oriented Var planning by grey wolf optimization (GWO) for system security has been proposed in this paper. Weak buses of the system has been determined by using four different methods, namely, fast voltage stability index (FVSI), line stability factor (LSF), line stability index (LSI) and voltage collapse proximity indicator (VCPI) method. Standard IEEE 57 bus test system is used as the test system to show the applicability of the proposed work. It has been observed that Var planning based on the detection of weak buses by voltage collapse proximity indicator provides the best result among other methods reported in literature. © 2016 IEEE.


Sethi K.K.,IIT ISM | Ramesh D.,IIT ISM
Journal of Supercomputing | Year: 2017

Frequent itemset mining is one of the data mining techniques applied to discover frequent patterns, used in prediction, association rule mining, classification, etc. Apriori algorithm is an iterative algorithm, which is used to find frequent itemsets from transactional dataset. It scans complete dataset in each iteration to generate the large frequent itemsets of different cardinality, which seems better for small data but not feasible for big data. The MapReduce framework provides the distributed environment to run the Apriori on big transactional data. However, MapReduce is not suitable for iterative process and declines the performance. We introduce a novel algorithm named Hybrid Frequent Itemset Mining (HFIM), which utilizes the vertical layout of dataset to solve the problem of scanning the dataset in each iteration. Vertical dataset carries information to find support of each itemsets. Moreover, we also include some enhancements to reduce number of candidate itemsets. The proposed algorithm is implemented over Spark framework, which incorporates the concept of resilient distributed datasets and performs in-memory processing to optimize the execution time of operation. We compare the performance of HFIM with another Spark-based implementation of Apriori algorithm for various datasets. Experimental results show that the HFIM performs better in terms of execution time and space consumption. © 2017 Springer Science+Business Media New York


Tarafdar A.,IIT ISM | Sinha A.,IIT ISM
Environmental Science and Pollution Research | Year: 2017

The role of preferential biodegradation in the reduction of cancer risk caused by polycyclic aromatic hydrocarbons (PAHs) has been studied. A consortium of microorganisms isolated from aged oil refinery exposed soil was used to degrade 13 PAHs content extracted from an urban traffic site soil. The biodegradation arranged in a batch process with a mineral salt broth, where PAHs were the sole carbon source. 70.46% biodegradation of the total PAHs occurred in an incubation period of 25 days. Sequential or preferential biodegradation took place as the lower molecular weight (LMW) PAHs were more prone to biodegradation than that of the higher molecular weight (HMW) PAHs. Microorganisms from the isolated consortia preferred the simpler carbon sources first. The relatively higher carcinogenicity of the HMW PAHs than that of the LMW PAHs leads to only 40.26% decrement in cancer risk. Initial cancer risk for children was 1.60E−05, which was decreased to 9.47E−06, whereas, for the adults, the risk decreased to 1.01E−05 from an initial value of 1.71E−05. The relative skin adherence factor for soil (AF) turned out to be the most influential parameter with 54.2% contributions to variance in total cancer risk followed by the exposure duration (ED) for children. For the adults, most contributions to the variance in total cancer risk were 58.5% by ED and followed by AF. © 2017 Springer-Verlag Berlin Heidelberg


Chandravanshi M.L.,IIT ISM | Mukhopadhyay A.K.,IIT ISM
Measurement: Journal of the International Measurement Confederation | Year: 2017

The vibratory feeder is a forced vibrating system mostly used in industries to feed material from hoppers, bins, silos and storage piles to belt conveyors. It is used to control the feed rate of material being transported. In this paper, dynamic analysis of the vibratory feeder is conducted theoretically and the obtained results are validated with experimental values corresponding to the various operating frequencies of the feeder unit. Further, speed of feed particles are identified experimentally at various operating frequencies. The actual vibration behavior of the particle on conveying surface is examined experimentally and movement of the particles are shown graphically. The experimental work is conducted on the fabricated vibratory feeder with 1HP motor installed on it with variable speed controller. The instruments used are the B&K 4-channel analyzer, accelerometer and the force transducer. The post processing of data analysis was done in ME'Scope software. © 2017


Ranjan R.,IIT ISM
Advances in Intelligent Systems and Computing | Year: 2017

Secure routing (SR) is one of the most important issues in Mobile Ad hoc Networks (MANETs). Recently, in 2013, Zhao et al. proposed an efficient routing integrated framework for MANETs. They claimed that their proposed scheme distributes the system parameter only to the authenticate nodes before network set up phase. However, based on cryptanalysis, we have found that an unauthenticated nodes are also be able to get that original system parameter and behave like a malicious node in the network. Thus, their scheme fails to provide an authenticate distribution mechanism in real life application. As a counter measurement, this paper aims to present an efficient authenticated distribution mechanism that can be incorporated very efficiently in their scheme. Our proposed technique is found to be secure under the hardness of Computational Diffie-Hellman (CDH) assumption. © Springer Nature Singapore Pte Ltd. 2017.


Mohit P.,IIT ISM | Biswas G.P.,IIT ISM
Advances in Intelligent Systems and Computing | Year: 2017

In this paper, we provide a secure storage of data in the cloud server using Identity-Based Encryption. Where the data owner shares the stored data with the cloud users on the basics of pay-as-you-use principle. The cloud user request for the encrypted data, stored on the cloud server’s database (by applying encryption on keyword) and the server verifies the request by performing test on encrypted data. So, that illegal users or unauthorized servers cannot attack on the data. © Springer Nature Singapore Pte Ltd. 2017.


Shankar R.,NIT | Pradhan S.R.,KIIT University | Chatterjee K.,IIT ISM | Mandal R.,IIT ISM
Renewable and Sustainable Energy Reviews | Year: 2017

Over the past few decades, many publications have been made in the area of Load frequency control (LFC) of interconnected power systems. Load frequency control is necessary to develop better control in order to achieve less effect on the frequency and tie line power deviations after a load perturbation. However, number of control strategies has been employed in the design of load frequency controllers in order to achieve a better dynamic response and the exact choice of the LFC controller in a particular case requires sufficient expertise because each controller has its own merits and demerits. Due to this, an appropriate review of load frequency control (LFC) mechanism is essential and a few attempts have been made in this concern. This paper presents a detailed survey on load frequency control (LFC) mechanism. The overall study explores the depth study issues related to LFC mechanism based on different sources of power system models. This paper focused on different control techniques of LFC, which also includes all the recent application of FACTS devices. This review reveals the investigation of soft computing based optimization technique and application of Energy Storage System (ESS) and HVDC-link in LFC. These studies also illustrates conventional power system, deregulated of power environment as well as distributed generation and micro grids. This paper is designed in order to highlight the major traits of Load forecasting and some critical case studies on LFC. © 2017 Elsevier Ltd


Das S.K.,IIT ISM | Tripathi S.,IIT ISM
Wireless Networks | Year: 2016

Designing an energy efficient routing protocol is one of the main issue of Mobile Ad-hoc Networks (MANETs). It is challenging task to provide energy efficient routes because MANET is dynamic and mobile nodes are fitted with limited capacity of batteries. The high mobility of nodes results in quick changes in the routes, thus requiring some mechanism for determining efficient routes. In this paper, an Intelligent Energy-aware Efficient Routing protocol for MANET (IE2R) is proposed. In IE2R, Multi Criteria Decision Making (MCDM) technique is used based on entropy and Preference Ranking Organization METHod for Enrichment of Evaluations-II (PROMETHEE-II) method to determine efficient route. MCDM technique combines with an intelligent method, namely, Intuitionistic Fuzzy Soft Set (IFSS) which reduces uncertainty related to the mobile node and offers energy efficient route. The proposed protocol is simulated using the NS-2 simulator. The performance of the proposed protocol is compared with the existing routing protocols, and the results obtained outperforms existing protocols in terms of several network metrics. © 2016 Springer Science+Business Media New York


Mathan Kumar N.,IIT ISM | Senthil Kumaran S.,RVS Educational Trusts Group of Institutions | Kumaraswamidhas L.A.,IIT ISM
Journal of Alloys and Compounds | Year: 2016

In this study, the Al 2618 aluminium alloy is reinforced with Si3N4 (Silicon Nitride), AlN (Aluminium Nitride) & ZrB2 (Zirconium Boride) in wt. % of (0,2,4,6,8) by stir casting process. The tribological and mechanical properties of these composites particles were investigated under dry sliding conditions. The mechanical properties of the composites is studied by conducting various test like hardness test, tensile test and compression test to understand the relationship between the wt. % of reinforcement and the matrix metal. This is followed by the micro structural study to examine the bond formation and effect of grain size reduction due to the addition of reinforcement. The Taguchi L25 orthogonal array is used to optimize the process parameters to obtain minimum wear rate and the analysis of variance (ANOVA) was used to investigate the influence of parameter affecting the wear rate. The Scanning Electron Microscope (SEM) analysis is carried out to understand the wear mechanism of worn out surfaces and the wear debris. The manipulate of the wt. % of reinforcements and applied load on the wear rate, wear resistance, specific wear rate, coefficient of wear rate and the mass loss were premeditated using the pin-on-disk method. © 2016 Elsevier B.V.


The objective of the present study is to estimate hydraulic load, induced stress and factor of safety of the Savonius hydrokinetic turbine when operating under free stream velocity of 0.3 m/s to 4 m/s at rotor angle 0° to 360°. Hydraulic load evaluated from CFD analysis, whereas the induced stress computed from FEM analysis based on the computed hydraulic load through CFD in ANSYS 14. The effects of deflector and duct augmentation technique on the hydraulic load and induced stress have also been investigated. The maximum hydraulic load and von-Mises stress on rotor are found as 0.57 Mpa and 153.41 Mpa respectively in case of duct with single deflector augmentation techniques at rotor angle 0°, 180° and 360° at 4 m/s free stream velocity. In Savonius rotor with augmentation techniques, at higher free stream velocity the factor of safety reached very low, somewhat equal or less than minimum specified limit of failure. Computation results show that front area of shaft rotor from inlet side experiences zone of high von-Mises stress and has minimum factor of safety that leads to chances of fatigue crack, when applied for a free stream velocity greater than 2 m/s. © 2016 Elsevier Ltd

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