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Nāgpur, India

Performance of a production system significantly depends upon the effective planning of its shop floor level operations like, production scheduling, maintenance and quality control. These three functions have an interaction effect on each other; hence a combined operational policy of these functions can improve the system performance. The objective of this paper is to develop a methodology for optimizing maintenance and quality plan with the constraint on schedule, availability, repair time and detection time, for a single machine. The approach includes the selective maintenance and a sampling procedure based on the economic design principle. Cost models developed for the problem at hand are presented along with their detailed explanation. Two solution methodologies namely, Simulated Annealing (SA) and Genetic Algorithm (GA) are used for obtaining the near optimal solution. A computational experiment to compare the performance of SA and GA is presented. Results indicate a better performance of the proposed approach over the conventional approach of independent planning. © 2015 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved. Source

Moon S.K.,PICT | Raut R.D.,RCOEM
International Journal of Electronic Security and Digital Forensics

For any type of steganography there is always a trade-off between information hiding capacity and security. In this paper we have proposed a new video steganography technique using forensic detection to improve information security and hiding capacity. For hiding secret data into the selected frames of video and audio, we have used general modified EMD algorithm for image steganography and speared spectrum algorithm for audio steganography and it is found to be excellent in terms of hiding capacity and security. Further at receiver end we have retrieved a secret data from the video and analyse the key security parameters to increase the data security. Our new approach efficiently hides large data and produces more security. We have tested our results through a number of simulations on gray as well as colour images and found the proposed algorithm to be better than any other existing technique. Copyright © 2015 Inderscience Enterprises Ltd. Source

Yadav P.J.,Rashtrasant Tukadoji Maharaj Nagpur University | Joshi C.P.,RCOEM | Moharil S.V.,Rashtrasant Tukadoji Maharaj Nagpur University
International Journal of Self-Propagating High-Temperature Synthesis

A simple, one-step, and fast method based on exothermic reactions is described for synthesis of Tb3Al5O12:Ce phosphor. Light-emitting diodes (LEDs) were fabricated by depositing this phosphor on a blue chip. Photoluminescence and LED emission are compared with respective results for well-known YAG:Ce phosphor. A significant improvement in color rendering index (CRI) attributed to the red shift of Ce3+ emission was observed. Persistent emission is also reported for the first time in the Tb3Al5O12:Ce annealed in reducing atmosphere. It well correlates with Ce3+ emission and a peak around 80°C in the thermoluminescence glow. The long-lasting emission was associated with host-related electron traps. © 2014 Allerton Press, Inc. Source

Gugulothu S.,Y.C.C.E. | Chawhan M.D.,RCOEM
Proceedings - International Conference on Electronic Systems, Signal Processing, and Computing Technologies, ICESC 2014

The density of integration in a single chip has progressed by use of the deep submicron of VLSI design rule. Systems on a chip (for short, SoCs), i.e., several functional cores being integrated in a single chip, have become the mainstream technology. On the other hand, A Network on a Chip (NoC), i.e., a communication-centric platform, offers an on-chip interconnection network. The NoC is one of the on-chip communication systems. The NoC is used in place of conventional shared bus systems. There are many NoC topologies for connecting cores to each other, such as Mesh, Ring, Spider on, and so on. To evaluate the NoC topologies, a simulation based approach was used for the modeling and analysis of the topologies. However, some properties of the topologies could affect the performance of the NoC systems. This paper describes about the performances of the topologies about the communication aspects by the simulation based approach. © 2014 IEEE. Source

Agrawal P.,RCOEM
Proceedings - International Conference on Electronic Systems, Signal Processing, and Computing Technologies, ICESC 2014

Vehicular Ad hoc Network (VANET) is the network among vehicles. The efficient routing protocol is required to route the data from source node to destination node in VANET. In existing protocols, Ad hoc On-Demand Multipath Distance Vector (AOMDV) the number of hops increases with data traffic and Secure Ring Broadcast (SRB) routing protocol the routes established are very stable but cannot adapt to engaged nodes circumstances. A new concept protocol, Multipath Reliable Range Node Selection Distance Vector (MRRNSDV) routing is proposed which will be multipath protocol and number of hops will remain same even at high traffic conditions. This protocol is basically proposed to reduce the number of hops, find multiple paths to destination node and avoid channel congestion in more efficient way to increase the performance under higher traffic condition unlike Ad hoc on demand distance vector (AODV) protocol. © 2014 IEEE. Source

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