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Patel D.P.,Dr Jivraj Mehta Institute Of Technology | Srivastava P.K.,Sardar Patel University | Srivastava P.K.,University of Bristol
Water Resources Management | Year: 2013

Flood is an overflow of water that submerges land and the inflow of tide onto land. Floods usually cause large-scale loss of human life and wide spread damage to properties. In this study, integration of the satellite and GIS datasets are carried out to prepare the flood zonation mapping of Surat district, Gujarat, India. High resolution remote sensing images from Google-earth, IRS-1D, 1:50000 topographical maps are combined with hydraulic analysis and digital elevation model (DEM) to identify the flood susceptible area of the various zones divided as North, South, East, West, Central, South-East and South-West validated with the field surveys. The work is extended up to the Town Planning Scheme (TPS), to detect the most vulnerable areas in terms of submergence. Overall analysis indicates that more than 90-95 % of the area would be submerged if the flood of the same frequency happened over this flood plain in the near future. To mitigate the floods hazards, various remedial measures are suggested to lower the degree of danger owing to future flood events. © 2013 Springer Science+Business Media Dordrecht.


Patel P.R.,Smt S M Panchal Science College | Rathod J.R.,Dr Jivraj Mehta Institute Of Technology | Patel H.S.,Commerce and Science College | Patel K.D.,Sardar Patel University | Pathak V.M.,Sardar Patel University
Advanced Materials Research | Year: 2013

WSe2 is a member of group-VI Transition Metal Dichalcogenides (TMDCs) and has been observed to be a highly stable semiconducting material. It has been grown in crystal form using a direct vapour transport technique in present case. The grown WSe2 crystals were characterized for the structural properties using X-ray diffraction technique (XRD). The hexagonal structure was confirmed through this analysis. Using the data of XRD, various parameters like crystalline size, lattice parameters, micro strain, dislocation density, unit cell volume, unit cell density, growth fault and deformation fault probability etc were found. It was seen that the micro strain, dislocation density and growth & deformation fault probabilities were found to be very low in WSe2 crystals. The grown WSe2 crystals were characterized for optical properties using UV-VIS-NIR spectroscopy. The absorption spectra of WSe2 grown in present case revealed the fact that WSe2 posses direct band gap around 1.38eV. Layered di-chalcogenides WSe2 (or MoSe2) are used for desired applications such as in photo-conversion devices. © (2013) Trans Tech Publications, Switzerland.


Patel D.P.,Dr Jivraj Mehta Institute Of Technology | Patel D.P.,Saffrony Institute of Technology | Srivastava P.K.,University of Bristol | Gupta M.,Indian Institute of Technology Delhi | Nandhakumar N.,WTI Advance Technology Ltd
Journal of Earth System Science | Year: 2015

Watershed morphometric analysis is important for controlling floods and planning restoration actions. The present study is focused on the identification of suitable sites for locating water harvesting structures using morphometric analysis and multi-criteria based decision support system. The Hathmati watershed of river Hathmati at Idar taluka, Sabarkantha district, Gujarat is experiencing excessive runoff and soil erosion due to high intensity rainfall. Earth observation dataset such as Digital Elevation Model and Geographic Information System are used in this study to determine the quantitative description of the basin geometry. Several morphometric parameters such as stream length, elongation ratio, bifurcation ratio, drainage density, stream frequency, texture ratio, form factor, circularity ratio, and compactness coefficient are taken into account for prioritization of Hathmati watershed. The overall analysis reveals that Hathmati comprises of 13 mini-watersheds out of which, the watershed number 2 is of utmost priority because it has the highest degradation possibilities. The final results are used to locate the sites suitable for water harvesting structures using geo-visualization technique. After all the analyses, the best possibilities of check dams in the mini-watersheds that can be used for soil and water conservation in the watershed are presented. © Indian Academy of Sciences.


Gupta A.,Galgotias University | Patel B.,Dr Jivraj Mehta Institute Of Technology | Rana K.,Galgotias University | Pradhan R.,GLA University
Smart Innovation, Systems and Technologies | Year: 2015

A mobile Ad hoc network has been constructed as virtual backbone or spine of wireless medium. Due to nomadic habit of the node, MANET network are easily establish to a group of nodes with self configuring manner. MANET is simple to set and has changing Topology. Routing in a MANET is a particularly challenging task compared to a conventional network. For data transfer in MANET one of the most commonly used routing protocol is Ad hoc on demand distance vector (AODV), where routes provide on demand and node act as router. It’s performance is based on the services of the network, however MANET are vulnerable to attacks due to it’s dynamic, nomadic and open environment. However, network is vulnerable to the attacks by presence of malicious nodes. DOS and Black Hole attacks are two security threats in AODV.DOS attacks aims to disrupt the service provided by network or server by continuously sending unwanted packets using malicious node. In Black hole attack, the aim of this attack to capture the path and send fake route reply message and routing information. So to overcome from these consequences we propose an algorithm which introduce a mechanism of DOS and Black hole attacks prevention and check network performance in malicious environment on the analysis of throughput and end to end delay. © Springer India 2015.


Rathod J.R.,Dr Jivraj Mehta Institute Of Technology | Patel H.S.,Sardar Patel University | Patel K.D.,Sardar Patel University | Pathak V.M.,Sardar Patel University
AIP Conference Proceedings | Year: 2011

Thin films of ZnTe with thickness around 2.0 kÅ, 4.0 kÅ and 6.0 kÅ have been deposited by thermal evaporation method on ultrasonically cleaned glass substrates at 373 K substrate temperature under the pressure of 5×10 -6torr. The structural and optical characterizations of the films were carried out using X-ray diffraction (XRD) technique and UV-VIS-IR spectroscopy respectively. The lattice constant (a), grain size(D), strain(ε), dislocation density(ρ) were calculated and results have been discussed. The optical bandgap, (E g) have been determined from the absorption spectra for all thin films which indicates direct band to band transitions. Variations of transmittance and extinction coefficient with incident photon energy have also been investigated. © 2011 American Institute of Physics.

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