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Time filter

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New Delhi, India

Sharma A.,AIACTR | Gupta S.K.,Ambedkar Polytechnic | Kanaujia B.K.,AIACTR | Pandey G.P.,MAIT
Proceedings - 4th International Conference on Computational Intelligence and Communication Networks, CICN 2012 | Year: 2012

This paper presents a novel slit cut circular patch antenna (SC-CPA) with supers rate. An analysis of triple band slit cut circular patch antenna with supers rate is presented and results are verified by simulation. Various parameters of antenna such as input impedance, return loss and gain are investigated. The parametric study of frequency response of antenna is carried out for different heights of dielectric supers rate or cover causing the lowering of the resonant frequencies. The proposed antenna possessing triple band characteristics and resonates at 7.2 GHz, 8.5 GHz, and 10 GHz. Antenna possess a peak gain of 2.15 dB with a compactness level of around 20%. Antenna is investigated to provide protection from environmental hazards and it is worth for triple band operations. © 2012 IEEE. Source


Hote Y.V.,Indian Institute of Technology Roorkee | Gupta J.R.P.,University of Delhi | Choudhury D.R.,MAIT
Journal of Control Theory and Applications | Year: 2011

In this paper, a technique is presented to determine the stability margin of the discrete systems using recursive algorithm for power of companion matrix and Gerschgorin Theorem and hence sufficient condition of stability is obtained. The method is illustrated with an example and it is compared with other methods proposed in the literature. The results have applications in the filter design. © 2011 South China University of Technology, Academy of Mathematics and Systems Science, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg. Source


Khanna A.,MAIT | Singh A.K.,National Institute of Technology Kurukshetra | Swaroop A.,Galgotias University
Journal of Information Science and Engineering | Year: 2014

The κ-local mutual exclusion is a generalization of local mutual exclusion problem introduced by Attiya et al.. In κ-local mutual exclusion, it is assumed that the κ identical copies of a resource are shared among the geographically close nodes. The paper proposes a solution to the κ-local mutual exclusion problem in MANETs. The algorithm uses a leader-based approach and the leader is equipped with a token. It is suited to handle mobility that triggers the dynamism in topology of ad hoc networks. The algorithm satisfies safety, starvation freedom and l-deadlock avoidance properties. The best case message complexity of our algorithm is O(1) whereas the worst case message complexity is O(N). To the best of our knowledge, it is the first algorithm to solve κ-local mutual exclusion problem in MANETs. The solution to token loss problem is also included in the present exposition. Source


Jain V.,MAIT | Sachdeva G.,National Institute of Technology Kurukshetra
Journal of Energy in Southern Africa | Year: 2014

In a present study, the performance of a vapour compression-absorption cascaded refrigeration system (CRS) under fouled conditions was analysed. The main effect of fouling is to decrease the effectiveness of the heat exchanger. Thus, the overall conductance (UA) of the heat exchanger is decreased. Hence, another interpretation of fouling is to reduce the effective size of the heat exchanger. In the present work, the percentage decrease in the overall conductance value (UA) of evaporator and condenser due to their fouling is varied from 0 to 50% and its consequences on various aspects of CRS are generated to ascertain any possible patterns. The detailed first law analysis reveals that for a clean evaporator and condenser, the electricity consumption is 67.5% less than vapour compression system (VCS) for the same cooling capacity. CRS is able to save only 61.3% of electrical energy when evaporator and condenser conductance is reduced by 50% due to fouling. Evaporator and condenser fouling decreased the COP and rational efficiency of the system by 4.7% and 10.5% respectively. It is also important to note that irreversibility in the evaporator and condenser is increased by 42.4% and 62.1% respectively, when their individual performance is degraded by 50% due to fouling. Source


Ahmad J.,MAIT | Prasad D.,Jamia Millia Islamia University
Contemporary Engineering Sciences | Year: 2015

In this paper we present new applications of voltage differencing voltage transconductanse amplifier (VDVTA) as current-mode (CM) biquad filter and electronically controllable sinusoidal oscillator (ECSO) using single VDVTA and with four passive components, three passive components respectively. The biquad circuit realizes low pass, high pass, and band pass filter simultaneously without changing the circuit topology. The oscillator circuit also enjoys the explicit current output and also the frequency is electronically controllable. The active and passive sensitivities for both circuits are very low. Both the circuits are simulated using PSPICE with TSMC CMOS 0.18 μm process parameter. © 2015 Javed Ahmad and Dinesh Prasad. Source

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