Global Institute of Technology

Jaipur, India

Global Institute of Technology

Jaipur, India
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Bhatti S.,University of Rajasthan | Surve S.,University of Rajasthan | Shukla V.N.,Global Institute of Technology
Materials Today: Proceedings | Year: 2017

Cobalt and Chromium doped Zinc Oxide nanoparticles were synthesized by the microwave method, an easier, less time consuming method which yield doped Zinc Oxide nanoparticles of uniform size, shape and morphology. Various ratios of Zinc nitrate, Chromium nitrate, Cobalt nitrate, and Citric acid were used to synthesize these nanoparticles. X-ray diffraction (XRD), scanning electron microscopy /energy-dispersive X-ray spectroscopy (SEM/EDS) techniques were used to characterize these nanometer size pored materials. Magnetic behavior of both Cr doped and Co doped ZnO nanoparticles have been compared in the present work using the VSM at room temperature. © 2017 Elsevier Ltd. All rights reserved.

Saini H.,Global Institute of Technology | Kumar D.,Global Institute of Technology | Shukla V.N.,Global Institute of Technology
Materials Today: Proceedings | Year: 2017

Hot corrosion is a serious problem in power plants, boilers, gas turbine and internal combustion engines. There are several alloys and super alloys which are capable to protect the components within a certain limit. So many coatings are widely used to improve service life of components by providing better erosion-corrosion resistance to the substrate. This review is essentially based on the hot corrosion behavior of Nanostructured and conventional Cr3C2-NiCr coatings deposited by several thermal spray techniques. This review is done to summarize the various properties of Chrome carbide nickel chrome coatings deposited by different methods and the hot corrosion behavior of both Nanostructured and conventional coatings in molten salts environment. High-velocity oxy-fuel (HVOF) spraying method is effective method to deposit dense and less porous coatings but a new method has been developed known as Detonation gun (D-Gun) coating,deposited by D-gun has low porosity and high bond strength than HVOF. Plasma spray is also thermal spray technique which possess less porosity, high bond strength, good abrasive and wear resistance and high hardness value but the cost of equipment is very high which is the limitation of this method. The main aim of the review is to summarize the performance of Cr3C2-NiCr coatings in various environment and to study the effect of coating parameters such as coating thickness & porosity on the hot corrosion behavior. © 2017 Elsevier Ltd. All rights reserved.

Jain B.,Global Institute of Technology | Agarwal S.,Global Institute of Technology
Proceedings of the 2016 6th International Conference - Cloud System and Big Data Engineering, Confluence 2016 | Year: 2016

Hadoop is a Technology which uses Distributed File System for storage of data in chunks and Mapreduce for processing massive data in parallel manner. Hadoop supports almost zettabytes of data for storage and about megabytes of map-reduce storage. In this paper, we are proposing Disk Space Monitoring System which is built on top of Hadoop Distributed File System (HDFS). The special requirement in a Hadoop system is a well-balanced cluster, we do not want to have some nodes being much more (or less) utilized then others so it is mandatory to design well balanced cluster in context to Disk Space Utilization. © 2016 IEEE.

Yadav A.,Global Institute of Technology | Goyal S.,Global Institute of Technology | Agrawal T.,Global Institute of Technology | Yadav R.P.,Malaviya National Institute of Technology, Jaipur
2016 International Conference on Recent Advances and Innovations in Engineering, ICRAIE 2016 | Year: 2017

A compact in size microstrip antenna with multiband resonance features is described in this paper. A circular antenna with the partial ground is used as a primary antenna which resonated for WiMAX band (3.3-3.7 GHz). Further, primary antenna embedded with mushroom shape EBG (Electromagnetic Band Gap) and periodic DGS (Defected Ground Structure) to operate over WLAN band (5.1-5.8 GHz) and X-band from 8-12 GHz. Proposed antenna covers 2.4/3.5/5.5 GHz bands and complete X-band which also reflects that it has novel suitability to use for a ZigBee/Wi-Fi/Bluetooth applications. The proposed antenna is etched on FR-4 substrate and overall dimension is 20×26×1.6 mm3. The projected antenna has wide-ranging bandwidth with VSWR < 2. It provides favorable agreement between measured and simulated results. © 2016 IEEE.

Tewari M.,Global Institute of Technology | Yadav A.,Global Institute of Technology | Yadav R.P.,Malaviya National Institute of Technology, Jaipur
2016 International Conference on Recent Advances and Innovations in Engineering, ICRAIE 2016 | Year: 2017

A frequency reconfigurable microstrip antenna using pixel ground is presented in this paper. A rectangle microstrip antenna with the partial ground is used as a primary antenna which operates over UWB band (3.1-10.6 GHz). A further ground of primary antenna converted into reconfigurable pixel shape to operate over multiple frequency bands. Proposed frequency reconfigurable antenna is able to switch between multiple resonant frequencies using PIN diode. Proposed antenna covers 5.6/6.6/7.8/8.2/9.4/7/5.4/5.2 GHz bands for WLAN band and X-band. The proposed antenna is printed on 1.6 mm thick FR-4 substrate with dimension 34×42.5 mm2. The proposed antenna has broad bandwidth with VSWR < 2. Measured and simulated result of primary antenna is presented and has the good agreement with results. © 2016 IEEE.

Saxena M.,Poornima University | Bannett O.O.,Global Institute of Technology | Sharma V.,Poornima University | Sharma V.,Global Institute of Technology
Procedia Engineering | Year: 2016

In this work the two disciplines of condition based maintenance (CBM), structural health monitoring (SHM) and prognostics are described fault identification and estimation is an important and necessary step in condition based maintenance. In the present work, an experiment is carried out with a customized test setup where the seeded defects are introduced in the inner race and outer race of a radial ball bearing. The relationship between the acquired vibration data and their relation with the seeded defect is found in this paper. When experiment is performed on the test setup designed for Fault prediction, Analytical Wavelet Transform proved an effective tool for the analysis of vibration signal. In this work, AWT followed by the Power Spectral Density is implemented on vibration signals of a defective Radial Ball Bearing. After finding the fault, its location and its intensity Ball Bearing's remaining useful life is estimated. © 2016 The Authors.

Singh P.,Global Institute of Technology | Pant M.,Indian Institute of Technology Roorkee
Advances in Intelligent Systems and Computing | Year: 2014

Shell and tube heat exchangers (STHE) are the most common type of heat exchangers widely used in various kinds of industrial applications. Cost minimization of these heat exchangers is of prime concern for designers as well as for users. Heat exchanger design involves processes such as selection of geometric and operating parameters. Generally, different exchangers geometries are rated to identify those that satisfy a given heat duty and a set of geometric and operational constraints. In the present study we have considered minimization of total annual cost as an objective function. The different variables used include shell internal diameter, outer tube diameter and baffle spacing for which two tube layout viz. triangle and square are considered. The optimization tool used is differential evolution (DE) algorithm, a nontraditional stochastic optimization technique. Numerical results indicate that, DE can be used effectively for dealing with such types of problems. © Springer India 2014.

Khichar R.,Global Institute of Technology | Upadhyay S.S.,Global Institute of Technology
Applied Geomatics | Year: 2010

We are at a time of transition in the fields of planetary geodesy, mapping, and imaging. Planetary exploration has moved from a time of initial reconnaissance of the solar system using mostly planetary flyby missions and images exclusively from framing cameras to much more extensive missions of targeted exploration using orbiting spacecraft, linescanner cameras, laser altimeters, and other sensors. It is appropriate to review the past history of this effort, recent advances in this area, and the current state of the art in both planetary and terrestrial geodesy, mapping, planetary imaging and surveillance, and reference systems. A wireless sensor network is a network consisting of small sensing devices spatially distributed using sensors to cooperatively monitor various conditions (Römer and Mattern, IEEE Wireless Comm 11(6):54-61, 2004; Thomas Haenselmann, Sensornetworks, GFDL Wireless Sensor Network textbook, http://www.∼haensel/sn-book, 2006). So far, over 100 physical (light, pressure, humidity, etc.), chemical (gas, liquid, solid, etc.), and biological (DNA, protein, acoustics, etc.) properties can be sensed by using in situ sensing technology. With the presence of cheaper, miniature, faster, and smart in situ sensors, the increasing availability of abundant ubiquitous computing devices, wireless and mobile network access, and autonomous and intelligent geospatial software agents, distributed networked. © The Author(s) 2010.

Grover J.,Global Institute of Technology | Laxmi V.,Malaviya National Institute of Technology, Jaipur | Gaur M.S.,Malaviya National Institute of Technology, Jaipur
International Journal of Security and Networks | Year: 2014

In vehicular ad hoc networks (VANETs), vehicles are enabled to exchange information to detect and mitigate critical situations. VANETs are vulnerable to many security threats. One severe attack is Sybil attack, in which a malicious node forges large number of fake identities in order to disrupt the proper functioning of VANET applications. Fake information reported by a single malicious vehicle may not be highly convincing because most of the VANET applications require several vehicles to reinforce a particular information before accepting as a truth. A Sybil attacker pretends multiple vehicles in order to reinforce false messages. Proposed methodology exploits the characteristics of Sybil nodes as the neighbours of fake identities (originated from a malicious node) share significant common neighbouring nodes. Motivation behind the design of proposed approach is to locate Sybil nodes quickly without using secret information exchange and special hardware support. We evaluate our proposed approach on the realistic traffic scenario. Copyright © 2014 Inderscience Enterprises Ltd.

Soni A.,Global Institute of Technology | Gupta V.,Malaviya National Institute of Technology, Jaipur | Arora C.M.,Malaviya National Institute of Technology, Jaipur | Dashora A.,University of Rajasthan | Ahuja B.L.,University of Rajasthan
Solar Energy | Year: 2010

We report energy bands, density of states and optical properties of CuGaS2 and CuInS2 chalcopyrites. The electronic structure has been computed using linear combination of atomic orbitals (LCAO) scheme within density functional theory (DFT) and full-potential linearised augmented plane wave method. The energy bands, density of states, components of dielectric tensors and absorption coefficients are compared with the available data. It is seen that the present LCAO-DFT calculations reproduce the electronic properties of both the chalcopyrites in a reasonable way. The optical properties show more absorption of solar radiations for CuGaS2 chalcopyrite, depicting its more usefulness in the solar cells. © 2010 Elsevier Ltd.

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