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Chaudhury P.,R.Ø.S.A. | Samantaray S.,R.Ø.S.A. | Sahu S.,G.I.T.A
Materials Today: Proceedings | Year: 2017

The material removal rate needs to be maximized while controlling the surface quality as increasing quality demands, at higher productivity level which is today's need in industrial area. Powder Additive mixed EDM brings the revolution in machining industry due to high surface finish and high MRR. Many research works has already done to analyse the effect of powder mixed dielectric on EDM machining process. In this paper, a study was carried out on the influence of the parameters such peak current, powder type, powder concentration on EN-19 work piece. Taguchi methodology has been adopted to plan and analyze the experimental results. In this study seven factors with three levels are investigated using Orthogonal Array (OA) L9. The result of the experiment then was collected and analyzed using MINITAB 13 software. The recommended best parametric settings have been verified by conducting confirmation experiments for MRR. © 2017 Published by Elsevier B.V.

Chaudhury P.,Ite a University | Samantaray S.,Ite a University | Sahu S.,G.I.T.A
Lecture Notes in Mechanical Engineering | Year: 2017

Powder-mixed EDM is a prominent methodology for enhancing surface quality as well as MRR. The objective of this experiment is to optimize the PMEDM process parameters for machining EN19 work piece by Cu electrode with tungsten powder additives. In this experiment, three levels of current, powder concentration, and pulse on time are kept as the main variables for which Taguchi single objective methodology has been adopted to design the experiment. ANOVA has been done to show powder concentration is the significant variable for high MRR. The conclusions arrived for an optimum value of different parameters has also been verified and the error was found to be 0.64%. © Springer Science+Business Media Singapore 2017.

Nayak R.C.,Siksha ‘O’ Anusandhan University | Roul M.K.,GITA | Sarangi S.K.,Siksha ‘O’ Anusandhan University
International Journal of Applied Engineering Research | Year: 2017

Natural convection heat transfer in heated vertical pipes dissipating heat from the internal surface is presented. The pipes are open-ended and circular in cross section. The test section is electrically heated imposing the circumferentially and axially constant wall heat flux. Heat transfer experiment is carried out for four different channels of 45mm internal diameter and 3.8mm thickness with length varying from 450 mm to 850 mm. Ratios of length to diameter of the channel are taken as L/D = 10, 12.22, 15.56, and 18.89. Wall heat fluxes are maintained at q// = 250 to 3341 W/m2. The studies are also carried out on intensified channels of the same geometrical sizes with the discrete rings of rectangular section. A correlation is developed for average Nusselt number and modified Rayleigh number and another correlation is also developed for modified Rayleigh number and modified Reynolds number. These correlations predict the data accurately within ± 10% error. © Research India Publications.

Nayak B.,Trdent Academy of Technology | Prasad S.,GITA
International Review on Computers and Software | Year: 2011

This paper deals with the overview of association rule mining algorithms in large databases used for especially business organizations where the amount of transactions and items plays a crucial role for effective decision making. Frequent item-set generation and the creation of strong association rules from the frequent item-set patterns are the two basic steps in association rule mining. It becomes very much tedious for mining the association rules as the data are growing instantaneously in every sphere of life. Therefore it becomes important to develop effective association rule mining techniques in such a way that interesting rules are mined effectively from large databases. In this paper we have analyzed different association rule mining techniques with its current directives for large databases. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.

Moharana J.,GITA | Sengupta M.,BESU | Sengupta A.,BESU
International Journal of Power and Energy Conversion | Year: 2015

The static synchronous compensator (STATCOM) is becoming increasingly popular in power system applications. Through reactive power compensation, supply side power factor at point of common coupling (PCC) can be improved to almost unity. The highlight of the present work is the practical implementation of such a scheme on a 10 kVA STATCOM laboratory prototype fabricated for the purpose. The linear model of the STATCOM is discussed, in which the current and DC-link voltage controllers have been separately designed. The performance of all the designed controllers are first simulated and then experimentally validated as mentioned. Excellent agreement between the simulated and experimental results demonstrates the effectiveness of the proposed control strategy. Copyright © 2015 Inderscience Enterprises Ltd.

Panda R.N.,Nalanda Institute of Technology | Kumari Padhy S.,Siksha ‘O’ Anusandhan University | Panigrahi S.P.,GITA
Signal Processing | Year: 2013

This paper addresses the complexity problem associated with the QR decomposition algorithm, which is frequently used as a faster alternative to channel inversion in a MIMO scheme. Channel tracking can be employed with QR equalization in order to reduce the pilot overhead of a MIMO system in a non-stationary environment. QR decomposition is part of the QR equalization method and has to be performed in every instance that the channel estimate is obtained. The high rate of the QR decomposition, a computationally intensive technique, results in a high computational complexity per symbol. Some novel modifications are proposed to address this problem. Reducing the repetition rate of QR decompositions and tracking R (the upper triangular matrix) directly, while holding unitary matrix Q fixed, can significantly reduce complexity per symbol at the expense of some introduced error. © 2013 Elsevier B.V. All rights reserved.

Nayak C.K.,GITA | Das S.,VSSUT | Behera H.S.,VSSUT
Smart Innovation, Systems and Technologies | Year: 2015

In communication medium a single fault will affect the complete system. So in the designing of Network-on-Chip (NoC) based systems the reliability is an important aspect. Also we have to concentrate on the performance improvement in the fault tolerant NoC architectures. In this paper, we are going to achieve high level performance by using hierarchical agents by proposing Fault-tolerant NoC architecture. The fault information will be collected and will be distributed after processing from these agents which are placed everywhere in the network. Along with that the permanent Faults information that occur in the interfaces of network, links and in different parts of the routers will be exploited from the enhanced fault tolerant and congestion aware routing method. © Springer India 2015.

Sahu S.,GITA | Nayak S.K.,GITA | Choudhary P.,GITA
Advanced Materials Research | Year: 2014

The non-convectional machining processes are those using thermal source of energy for the material removal. Among them Electrical discharge machining (EDM) or spark erosion machining is most important one. The important process parameters in this technique are discharge pulse on time, discharge pulse off time current and gap voltage. The values of these parameters significantly affect such machining outputs as material removal rate. In this paper, an axisymmetric thermo-physical finite element model for the simulation of single sparks machining during electrical discharge machining (EDM) process is exhibited. The model has been solved using ANSYS 11.0 software. A transient thermal analysis assuming a Gaussian distribution heat source with temperature-dependent material properties has been used to investigate the temperature distribution. Material removal rate was calculated for multi-discharge machining by taking into considerations the number of pulses. Comparison, analyzation of the theoretical result and experimental result by considering the same process parameters has been done, and the result is highly agreed between the experimental and theoretical value so the model is validated. © (2014) Trans Tech Publications, Switzerland.

Sahoo M.K.,GITA | Swain K.,GITA | Rath A.K.,VSSUT
Smart Innovation, Systems and Technologies | Year: 2015

In some secure communication system, to detect the frequently varied baseband signal, a digital down converter (DDC) with a variable digital filter is used. In this paper, a reconfiguration design process of DDC is discussed for a GSM application with the help of Xilinx system generator (XSG) on field programmable gate array (FPGA). The approach is based on hardware Co-simulation based on XSG platform which integrates itself with the Matlab based Simulink graphics environment and implemented on Virtex-II based xc2v200-4fg676 FPGA device. Optimal equiripple technique implements DDC which reduces the resource requirement. To solve the complexity, a novel type of polyphase decomposition structure is used. Keeping the view of the system performance, such as area and speed, this paper proposes a model which is implemented by using embedded multiplier, LUTs and BRAM of FPGA. It is seen that the proposed design consumes very less resources available on target devices. © Springer India 2015.

Nayak C.K.,VSSUT | Rath S.,GITA | Pradhan M.,GITA | Das S.,VSSUT
Smart Innovation, Systems and Technologies | Year: 2016

A wireless sensor network (WSN) is typically comprised of a large number of nodes spread over a large area sensors. Sensor nodes are small, low battery, limited storage and processing power. Each node is usually equipped with a wireless radio transceiver, a small micro-controller, a source of power sensors and multiple types such as temperature, light, pressure, sound, vibration nodes etc. These ways to communicate directly with network among themselves or through other nodes. The first objective is to collect data on WSN sensor nodes. If the data on the web passes through the one or more sensor nodes, power consumption in the first node differs from the second node. Therefore, the loaded nodes too quickly lose battery power and shut down. Imagine this situation happens to a group of neighboring nodes and fall of premature death, leading energy gap in the network. Energy gap affects other nodes in the network nodes that share the power load port has a load to the other nodes in the network. As a result, life of a network will end soon. Our research is aimed at maximizing the coverage area, increasing the detection range of remaining sensor nodes when a node fall in premature death, to prevent the formation of holes in the supply network of wireless sensors. © Springer International Publishing Switzerland 2016.

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