Pauri Garhwal, India
Pauri Garhwal, India

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Vaid S.,Guru Gobind Singh Indraprastha University | Mittal A.,Gb Pant Engineering College
Progress In Electromagnetics Research C | Year: 2017

A wideband orthogonally polarized resonant cavity antenna (RCA) with double-layer Jerusalem Cross type partially reflective surface (PRS) as superstrate is presented in this paper. The PRS is analyzed using equivalent circuit modelling and full wave simulations. Two-port dual-polarized aperture coupled microstrip patch has been used as primary feed antenna. Measured results show that the antenna structure exhibits 10 dB return loss bandwidth of 14.7% at 10 GHz (9.4–10.9 GHz), and the isolation between the feeding ports is better than 18 dB over the bandwidth. The cross-polarization levels in both E and H planes are better than 15 dB. The peak directivity of the antenna is 13 dBi in the entire band. The antenna is suitable for marine and weather Radar applications. © 2017, Electromagnetics Academy. All rights reserved.


Saini P.,Banasthali University | Khan S.,Banasthali University | Baunthiyal M.,GB Pant Engineering College | Sharma V.,Banasthali University
Chemosphere | Year: 2012

Fluoride (F) contamination is a global environmental problem, as there is no cure of fluorosis available yet. Prosopis juliflora is a leguminous perennial, phreatophyte tree, widely distributed in arid and semi-arid regions of world. It extensively grows in F endemic areas of Rajasthan (India) and has been known as a "green" solution to decontaminate cadmium, chromium and copper contaminated soils. This study aims to check the tolerance potential of P. juliflora to accumulate fluoride. For this work, P. juliflora seedlings were grown for 75d on soilrite under five different concentrations of F viz., control, 25, 50, 75 and 100mgNaFkg-1. Organ-wise accumulation of F, bioaccumulation factor (BF), translocation factor (TF), growth ratio (GR) and F tolerance index (TI) were examined. Plant accumulated high amounts of F in roots. The organ-wise distribution showed an accumulation 4.41mgkg-1dw, 12.97mgkg-1dw and 16.75mgkg-1dw F, in stem, leaves and roots respectively. The results indicated significant translocation of F from root into aerial parts. The bioaccumulation and translocation factor values (>1.0) showed high accumulation efficiency and tolerance of P. juliflora to F. It is concluded that P. juliflora is a suitable candidate for phytoremediation purpose and can be explored further for the decontamination of F polluted soils. © 2012 Elsevier Ltd.


Khan U.,Gb Pant Engineering College | Haleem A.,Jamia Millia Islamia University
Journal of Manufacturing Technology Management | Year: 2015

Purpose - The purpose of this paper is to focus on studying the concept of "Smart Organization" and providing a comprehensive framework for the various factors as barriers for the smart organization, identifying and classifying the key criterion of these factors based on their direct and indirect relationships. Design/methodology/approach - In this paper an extensive literature survey and experts' opinion have been used to identify major barriers of smart organization. These barriers are then modeled using interpretative structural modeling (ISM) methodology. The model so developed has been further improved and an integrated model has been developed using fuzzy-MICMAC. Findings - Various barriers of smart organization have been identified and a structural model has been developed for barriers using the ISM methodology.The critical barriers have been found out by fuzzy-MICMAC analysis. The driver power and dependence graph has been plotted for barriers. The barriers are classified into four categories which are, autonomous, linkage, dependent and independent according to their driver power and dependence. From the ISM model and the integrated model, and from further discussions with the experts, it has been found that the barriers "(B1) organizational structure" and "(B6) Managerial actions" are the two most important barriers, every other barrier is directly or indirectly driven by these. Research limitations/implications - The basis of developing the ISM model, i.e, the structural self-interaction matrix is based on experts' opinion, therefore the result may get influenced if there is any biasing in judging the barriers. The future research scope for this paper will be to test the model generated in this paper. The testing of the model can be done by applying structural equation modeling technique, it has the capability of testing the hypothetical model. Further a framework of smart organizations can be created to find out the smartness of different organizations. Practical implications - The paper can be used by organizations in understanding the barriers in becoming "smart" on the basis of their inter-relationships. This model can help manufacturing organization of North India in understanding the barriers which needs to be worked upon and the inter-relationship among these factors. This model-based study may be helpful in understanding and implementing the practices of smart organization by removing the possible critical barriers. Originality/value - This is the first study to identify the barriers of smart organizations and to develop a model of these barriers using ISM and fuzzy-MICMAC. © Emerald Group Publishing Limited.


Verma S.K.,Gb Pant Engineering College | Kaushik B.K.,Indian Institute of Technology Roorkee
Proceedings - 3rd International Conference on Emerging Trends in Engineering and Technology, ICETET 2010 | Year: 2010

For System on-chip (SoC) designs in current Deep Submicron (DSM) era, interconnects play important role in overall performance of the chip. The factors such as propagation delay, power dissipation and crosstalk through RC modeled interconnects substantially affects the entire working of the chip. Functional crosstalk and crosstalk induced propagation delay have recently emerged as major sources of faults. The crosstalk effect is a consequence of coupling and switching activities that is encountered when there is a transition in previous state of wire as well as when transitions are in adjacent wires. Therefore, minimization or elimination of switching and coupling activities is crucial in enhancing the performance of SoC designs. This paper proposes encoding schemes in order to achieve reduction in transitions between the previous and present states of wire as well as transitions in adjacent wires. The reduction in transition improves the performance in terms of power dissipation, coupling activity and delay in on-chip bus. © 2010 IEEE.


Gautam A.K.,Gb Pant Engineering College | Chandel R.,Gb Pant Engineering College | Kr Kanaujia B.,Ambedkar Institute of Advanced Communication Technologies and Research
Microwave and Optical Technology Letters | Year: 2013

A novel CPW-fed hexagonal-shape monopole-like ultrawideband (UWB) antenna is proposed for UWB applications. The proposed antenna posses a method to minimize the monopole antenna by using a hexagonal shape over the conventional monopole patch antenna to lower the height of the antenna. The ground is vertically extended toward two sides of the single radiator. Therefore, the large space around the radiator that is usually wasted can be effectively saved. The antenna is practically fabricated and simulated. Measured results show a good agreement with simulated results. The prototype with very compact overall size of 25 × 23 × 1.6 mm3 achieves good impedance matching, stable radiation patterns, and constant group delay over an operating bandwidth of 2.71-12.61 GHz (9.9 GHz). © 2013 Wiley Periodicals, Inc.


Gautam A.K.,Gb Pant Engineering College | Kr Kanaujia B.,Ambedkar Institute of Advanced Communication Technologies and Research
Microwave and Optical Technology Letters | Year: 2013

A novel dual-band asymmetric slit with defected ground structure microstrip antenna for circular polarization (CP) operation is proposed. In which, the lower resonant band is excited by cutting asymmetric slit on square microstrip antenna, and a new concept of defected ground with truncated corners structure is used to excite upper resonant band. The antenna is practically fabricated and simulated. Measured results show a good agreement with simulated results. Antenna is compact in size and shows a good quality of polarization at both resonant bands. Antenna shows the bandwidth of 7.5% (2.30-2.48 GHz) and 2.94% (3.80-3.9 GHz) at lower and upper bands, respectively. The antenna also shows 40 and 11 MHz, 3-dB axial ratio bandwidth at lower and upper bands, respectively. The return loss and radiation pattern of the proposed antenna remain consistent for both resonant bands. Copyright © 2013 Wiley Periodicals, Inc.


Gautam A.K.,Gb Pant Engineering College | Yadav S.,Gb Pant Engineering College | Kanaujia B.K.,Ambedkar Institute of Advanced Communication Technologies and Research
Microwave and Optical Technology Letters | Year: 2013

A novel CPW-fed compact inverted L-strip ultra wideband (UWB) microstrip antenna is proposed for ultra wide band applications. The proposed antenna possesses a method to minimize the monopole antenna by loading of inverted L-strip over the conventional monopole patch antenna to lower the height of the antenna. The ground was vertically extended toward two sides of the single radiator. Therefore, the large space around the radiator that is usually wasted can be effectively saved. The antenna is practically fabricated and simulated. Measured results show a good agreement with simulated results. The prototype with overall size of 25 × 25× 1.6 mm3 achieves good impedance matching, constant gain, stable radiation patterns, and constant group delay over an operating bandwidth of 2.6-13.04 GHz (10.44 GHz). © 2013 Wiley Periodicals, Inc.


Chandel R.,GB Pant Engineering College | Gautam A.K.,GB Pant Engineering College
Electronics Letters | Year: 2016

A novel MIMO sharp band-notched antenna with high isolation for UWB applications is presented. The antenna consists of two antenna elements with an overall area of 18 × 36 mm2. A T-shaped stub is extruded in the ground plane to improve isolation and an L-shaped stub to introduce band-notched function C-band (3.62-4.77 GHz). The designed antenna possesses a low mutual coupling of >-20 dB over the operating band from 2.9 to 20 GHz. The performance of this antenna is studied in terms of isolation between the two ports, radiation pattern, efficiency, realised gain, and envelope correlation coefficient. © The Institution of Engineering and Technology 2016.


Bhadauria H.S.,Indian Institute of Technology Roorkee | Singh A.,Gb Pant Engineering College | Dewal M.L.,Indian Institute of Technology Roorkee
Computers and Electrical Engineering | Year: 2013

This paper presents an integrated segmentation method which combines the features of Fuzzy C-Mean (FCM) clustering and region-based active contour method. In the proposed method, FCM clustering is used to initialize the contour around the hemorrhagic region and then region-based active contour method propagates the initial contour towards the hemorrhage boundaries. Further, the FCM clustering is also used to estimate the contour propagation controlling parameters adaptively from the given image. The region-based active contour method uses the intensity information in the local regions as against the global regions in the traditional region-based active contour methods to guide the contour motion. The effectiveness of the proposed method is tested on the dataset of total 100 hemorrhagic brain CT images of 20 patients and the results are compared with region growing, FCM clustering and Chan & Vese methods. The proposed method yields the higher average values of the similarity indices namely sensitivity, specificity, accuracy and overlap metric as 79.93%, 99.10%, 84.83% and 88.84% respectively. © 2012 Elsevier Ltd. All rights reserved.


Sharma L.,Gb Pant Engineering College | Dimri P.,Gb Pant Engineering College
2015 International Conference on Computing for Sustainable Global Development, INDIACom 2015 | Year: 2015

Quality of service(QoS) becomes a more challenging task due to bandwidth constraints and dynamic topology of a wireless network. Because of dynamic topology reason nodes in a network moves freely and results in various routing problems. Therefore, to overcome these challenges a protocol with QoS is proposed in this paper named QAODV. In this paper two additional fields are to the message of Ad-hoc on demand distance vector (AODV) routing protocol added in order to improve performance in terms ofpacket delivery rate (PDR), packet loss ratio (PLR) and average end to end delay. The simulation results reveals the improved performances of QAODV with AODV and is achieved in packet delivery ratio and total no. of packets dropped in the network at the expense of forwarding more routing packets makes it more reliable in realtimetraffic scenario. © 2015 IEEE.

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