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Bhosale S.,College of Engineering, Pune | Daruwala R.,Veermata Jijabai Technological Institute VJTI
KSII Transactions on Internet and Information Systems

Multi-criteria decision making (MCDM) algorithms play an important role in ensuring quality of service in an integrated HetNets (Heterogeneous Networks). The primary objective of this paper is to develop a multi-criteria vertical handoff decision algorithm (VHDA) for best access network selection in an integrated Wireless Local Area Network (WLAN)/ Universal Mobile Telecommunications System (UMTS)/ Worldwide Interoperability for Microwave Access (WiMAX) system. The proposed design consists of two parts, the first part is the evaluation of an Analytic Hierarchy Process (AHP) to decide the relative weights of handoff decision criteria and the second part computes the final score of the weights to rank network alternatives using Simple Additive Weighting (SAW). SAW ranks the network alternatives in a faster and simpler manner than AHP. The AHP-SAW mathematical model has been designed, evaluated and simulated for streaming video type of traffic. For other traffic type, such as conversational, background and interactive, only simulation results have been discussed and presented in brief. Simulation results reveal that the hierarchical modelling and computing provides optimum solution for access network selection in an integrated environment as obtained results prove to be an acceptable solution to what could be expected in real life scenarios. © 2014 KSII. Source

Mulla A.,Veermata Jijabai Technological Institute VJTI | Baviskar J.,Veermata Jijabai Technological Institute VJTI | Naik R.,BNP Paribas
IEEE Aerospace Conference Proceedings

Satellite images are multi-spectral in nature that operate over wavelengths of wide range frequencies known as bands. Hence, they need to be processed cautiously. This paper presents a 4-Level DWT based Sub-Band Replacement (SR-DWT) Image Compression scheme, for LANDSAT satellite images. The algorithm is designed to compress various color band images captured by the satellite payload. By performing compression on these images and converting them to unique textured images, it exploits the sub-bands generated by the wavelet transform. Since the algorithm is a reversible process, it facilitates retrieval of the images back to colored format at the receiver. Due to the property of possessing spatial-frequency decomposition, the recovered images are of high quality with improved Peak Signal to Noise Ratio (PSNR) of 20dB and correspondingly very low MSE value. Using an astrophysical image database, the performance analysis of the 4-Level SR-DWT algorithm is illustrated. © 2015 IEEE. Source

Patil S.P.,Veermata Jijabai Technological Institute VJTI | Sangle K.K.,Veermata Jijabai Technological Institute VJTI
Journal of Building Engineering

The use of steel fibres in plain concrete helps in improving the mechanical properties of concrete structure. Thus the aim of present study is to investigate the effect of steel fibres on torsional strength improvement of concrete. The research evaluates the torsional strength and combined torsional-shear-bending strength. In this study, 20% of fly ash (class-C) is added as a replacement of binder to its weight and 1.5% steel fibres by weight of concrete. Experimental results show an improvement in torsional strength, combined torsional-shear-bending strength and crack resistance of concrete by addition of steel fibres in the concrete and a decrease in the deflection. Based on the experimental results the modified coefficient of the empirical formulae has been suggested to predict the torsional strength and torsional stress of steel fibre reinforced concrete. © 2016 Elsevier Ltd. All rights reserved. Source

Prabhu S.,Veermata Jijabai Technological Institute VJTI | Daruwala R.,Veermata Jijabai Technological Institute VJTI
International Journal of High Performance Computing and Networking

In the age of high-performance computing, multi-core technology is seen to bridge the gap between good system throughput and increased power dissipation. Most multi-core architectures share hardware resources between cores, leading to cross-core interference which is non-trivial in many cases. Effective shared resource management is necessary to minimise the performance variability of threads due to cross-core interference as well as optimise resource usage. Many biological models have been proposed which model interactions between species. This paper uses a mathematical model, on the lines of the competitive Lotka-Volterra model for biological population growth, which models performance of the cores in a shared-memory multi-core system. It further formulates stability conditions for the multi-core system taking into account the workload characteristics and derives partition sizes to partition the shared cache to reduce the effect of cross-core interference for different workload types. Analysis of scalability of the model is also presented. Performance evaluations reveal that the LV-based mathematical model can be used to study the effects of resource sharing between cores, calculate partition sizes and is scalable. © 2016 Inderscience Enterprises Ltd. Source

Kulkarni A.,Veermata Jijabai Technological Institute VJTI | Kazi F.,Veermata Jijabai Technological Institute VJTI | Singh N.,Veermata Jijabai Technological Institute VJTI
Proceedings of the 2013 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2013

This paper considers the synchronization of continuous-time(CT) multiagent systems with single integrator dynamics. Initially, a protocol that includes velocity information from the neighbour agent is taken into account for synchronization study. But, in practical systems, velocity information from the neighbour agent and position information of agents can only be received after a certain time delay. It is further shown in the paper that the protocol using delays in position and velocity still guarantees the synchronization of the multiagent system. The paper introduces two separate delay protocols for constant reference state and time varying reference state. We also discuss the convergence rate of synchronizing protocols with the delays in system. An application of such protocol is then used in the formation Control Problem. All the theoretical results are illustrated by simulations. © 2013 IEEE. Source

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