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Gupta M.K.,Its Engineering College | Niyogi R.,Indian Institute of Technology Roorkee | Misra M.,Indian Institute of Technology Roorkee
Match | Year: 2014

In this paper, a new 2D graphical representation of protein sequences is proposed. The coordinates of twenty amino acids are confined to only the first quadrant. The assignment of coordinates to each of the twenty amino acids is based on their molecular weights. This graphical representation is used to construct the probabilistic distribution of protein sequences. The distribution corresponding to each protein sequence is then used to analyze the similarity by using the relative entropy (Kullback-Leibler divergence). The proposed method is tested on ND6 protein sequences taken from eight different species. The phylogeny shown by the method is in agreement with previous studies on the same dataset. The proposedmethod does not require any alignment of protein sequence as compared to traditional alignment methods. Moreover, our results are consistent with the alignment methods.

Bhaskar D.R.,Jamia Millia Islamia University | Gupta S.S.,Ministry of Commerce and Industry | Senani R.,Netaji Subhas Institute of Technology | Singh A.K.,Its Engineering College
Analog Integrated Circuits and Signal Processing | Year: 2012

There have been two efforts earlier on evolving CFOA-based fully-uncoupled oscillators i.e. circuits in which none of the resistors controlling the frequency of oscillation (FO) appear in the condition of oscillation and vice versa. However, a non-ideal analysis of the earlier known circuits reveals that due to the effect of the parasitic impedances of the CFOAs, the independent controllability of FO is completely destroyed. The main objective of this paper is to present two new fully-uncoupled oscillators in which the independent controllability of the FO remains intact even under the influence of the non-ideal parameters/parasitics of the CFOAs employed. The workability of the proposed circuits has been confirmed by experimental results using AD844-type CFOAs. © 2012 Springer Science+Business Media, LLC.

Yadav S.,Its Engineering College | Kaushal M.,National Institute of Technology Hamirpur | Varun,National Institute of Technology Hamirpur | Siddhartha,National Institute of Technology Hamirpur
Experimental Thermal and Fluid Science | Year: 2013

An experimental investigation has been carried out to study the effect of heat transfer and friction characteristics of turbulent flow of air passing through rectangular duct which is roughened by circular protrusions arranged in angular arc fashion. The roughened wall is uniformly heated while other three walls are kept insulated. The thermal and friction characteristics are governed by duct aspect ratio (W/H), hydraulic diameter (D), relative roughness pitch (P/e), relative roughness height (e/D), arc angle (α) and Reynolds number (Re). Experiments encompassed that the Reynolds number ranges from 3600 to 18,100, P/e ranges from 12 to 24, e/D ranges from 0.015 to 0.03 and arc angle of protrusions arrangement ranges from 45° to 75°. The maximum enhancement in heat transfer and friction factor is 2.89 and 2.93 times as compared with smooth duct. These experimental results have been used to develop correlations for Nusselt number and friction factor. © 2012 Elsevier Inc.

Mishra S.,Its Engineering College | Yadava V.,Motilal Nehru National Institute of Technology
Optics and Lasers in Engineering | Year: 2015

The use of short and ultrashort laser pulses for micromachining application is an emerging technology. Laser Beam MicroMachining (LBMM) has revolutionized many industries by providing innovative solutions in numerous industrial micro-engineering applications. High-intensity short or ultrashort laser pulses are powerful thermal energy source for creating micro-features in wide range of materials. These lasers can precisely ablate various types of materials with little or no collateral damage. An overview of LBMM is given so that we can obtain a current view of capabilities and tradeoffs associated with LBMM of sub-micron size. The fundamental understanding of ultrafast laser ablation process has been elucidated and the various research activities performed with nanosecond, picosecond and femtosecond, lasers have been discussed to understand the physical mechanisms and the critical experimental parameters involved in the LBMM. The critical analysis of various theoretical and experimental models used to describe the performance analysis of LBMM has been elaborated so that we can identify the relevant principles underlying the process. © 2015 Elsevier Ltd.

Singh A.K.,Its Engineering College | Senani R.,Netaji Subhas Institute of Technology
Radioengineering | Year: 2012

The objective of this paper is to present a new universal current-mode biquad capable of providing all the five basic filter functions, namely, low pass (LP), band pass (BP), high pass (HP), band reject (BR) and all pass (AP) from the same configuration using only three Z-copy current follower transconductance amplifiers (ZC-CFTA) along with the provision of independent electronic tunability of the filter parameter ω 0 and Q 0 (or bandwidth) through two separate DC bias currents while employing both grounded capacitors as desirable for integrated circuit implementation. The workability of the proposed structure is verified by PSPICE simulations based on CMOS implementation of the ZC-CFTA.

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