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Greater Noida, India

Kainthura P.,UPES | Singh V.,UPES | Gupta S.,IIMT
Proceedings on 2015 1st International Conference on Next Generation Computing Technologies, NGCT 2015 | Year: 2015

Landslide disasters tend to occur suddenly at any point in time and causes huge damages to human life and resources. Constant monitoring of mountainous regions and an efficient prediction system is a necessity for saving many lives. Uttarkashi district of the Uttarakhand state has been chosen as the region of study as the place tends to receive frequent landslides. Past data of landslides and its causes has been collected and a model for analyzing and predicting landslide susceptibility is been proposed. Dynamic maps are created with the use of QGIS(open source) software. Real time data of rainfall levels must be captured by the sensors installed at the locations. The system has been trained to predict future possibility of any occurrence of landslide by applying machine learning techniques. K-means clustering algorithm is used for creating clusters defining different rainfall levels and ID3 decision tree learning classification is applied to predict alert level in a susceptible area. Alerts are generated on appearance of any risks. System administrators are able to view alerts in the map and perform other related queries. © 2015 IEEE. Source

Singh R.,Sharda University | Singh R.,Vishveshwarya Group of Institutions | Pandey S.P.,IIMT | Tomar S.K.,kshmipat University | And 2 more authors.
Nanoscience and Nanotechnology Letters | Year: 2014

Titanium Dioxide (TiO2 has been used as a working electrode of Dye sensitized solar cells (DSSC) for a long time. Their porous nature results in high surface area that ensures efficient light absorption. Apart from other advantages the porous nature of TiO2 results in a large number of surface states that trap carriers and promote recombination because of which efficiency goes down. In the present work, we have synthesized nanoparticles of PbS and develop a nanocomposite paste of TiO2-PbS. We have tested our nanocomposite paste for working electrode in DSSC. The samples were characterized using XRD, UV-VIS absorbance spectroscopy, FT-IR and SEM. PbS nanoparticles serve as surface state depressors, which reduces the surface states of TiO2 films. This further reduces recombination rate and increases the conversion efficiency of DSSC. The mechanism of charge transport on photovoltaic response and other parameters of the DSSC using PbS-TiO 2 nanocomposite are also presented in detail.© 2014 American Scientific Publishers All rights reserved. Source

Pandey G.N.,Amity University | Thapa K.B.,Chhatrapati Shahu Ji Maharaj University | Ojha S.P.,IIMT
Optik | Year: 2014

The omnidirectional reflection properties in one dimensional superconductor-dielectric photonic crystal have been studied theoretically. In this present communication, the superconductor-dielectric photonic crystal in one dimension having alternate regions of superconductor-dielectric. The reflectance behaviors from these periodic multilayered structures are calculated for different angles of incidence. The reflectance and band structure is obtained by solving a Maxwell's equation using a translational matrix method. The study of reflectance bands of such superconductor-dielectric photonic crystal show that it can be used as broad band reflector. © 2013 Elsevier GmbH. Source

Kumar V.,P.A. College | Suthar B.,Government of Rajasthan | Kumar A.,Amity University | Singh K.S.,P.A. College | And 2 more authors.
Silicon | Year: 2014

The effect of temperature and angle of incidence on the transmission spectra of a one dimensional photonic crystal for TE and TM polarizations has been studied. For a range of angle of incidence from 0° to 60°, the proposed structure works as an omni-directional reflector. For other angles of incidence more than 60°, the structure works as a selective TM-polarization filter i.e. a filter which completely blocks TE-polarized waves but allows certain frequencies of TM-polarized waves. At an angle of incidence of 89°, the structure works as a multi channel optical filter without introducing any defect in the geometry. Also, this multi-channel filter can work as a tunable filter by varying the temperature of the structure and the number of layers in the geometry. Only for two bi-layers the proposed structure works as a single channel filter. Therefore, such types of structure are easier to fabricate and may be cost effective as compared to defect one-dimensional photonic crystals. © 2013 Springer Science+Business Media Dordrecht. Source

Shahi A.K.,University of Lucknow | Singh V.,Banaras Hindu University | Ojha S.P.,IIMT
Optik | Year: 2014

The theoretical analysis of two distorted doubly clad optical waveguides having plasma in inner cladding region have been presented. By matching the electric field and its derivative on the various interfaces, the dispersion characteristic equations have been derived and hence the cutoff frequencies are obtained. It is observed that the cutoff frequency of both considered cases are the function of plasma frequency and plasma width. Also, the plasma in the inner cladding region provides the extra degree of freedom to control the dispersion characteristics and one can trail the cutoff frequencies dynamically in time by playing with the discharge parameters associated with the plasma. © 2014 Elsevier GmbH. All rights reserved. Source

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