Anu,Banasthali University |
Sati B.,Banasthali University |
International Journal of Pharmaceutical Sciences Review and Research | Year: 2014
2-nonyl-5-aryl-1,3,4-oxadiazole derivatives were synthesized by a multi-step reaction sequence. Structures of synthesized derivatives of oxadiazole were characterized and confirmed by IR and NMR. The synthesized compounds were screened for their in vitro antioxidant properties by DPPH method. The results of this investigation revealed that the synthesized compounds (3a, 3d and 3e) are potent antioxidant agents compared to standard. © 2014, Global Research Online. All rights reserved.
IET Conference Publications | Year: 2013
In this paper, the Prony's signal modeling approach is used to design fractional delay (FD) infinite impulse response (IIR) filters. This approach utilizes the least mean square error technique in indirect way to model the FD finite impulse response (FIR) filters into the lower order FD IIR filters. This modeling approach is the combination of direct least square method and the Pade's signal modeling method. Further, the design examples are also considered to observe the effectiveness of proposed FD IIR filters. In last, the stability of designed FD IIR filters is confirmed by showing the locations of poles in pole-zero plots.
Garg S.K.,JMIT |
Manna A.,PEC University of Technology |
Jain A.,National Institute of Technology Kurukshetra
Journal of the Brazilian Society of Mechanical Sciences and Engineering | Year: 2016
This research paper presents an experimental investigation of the machining characteristics and optimization of wire EDM process parameters during machining of newly developed Al/ZrO2(p) metal matrix composite (MMC). Central composite design and full factorial approach of response surface methodology (RSM) have been used to design the experiment. This paper outlines the development of mathematical response surface models for spark gap and material removal rate and their applications to optimize the wire EDM process parameters using desirability function approach. Multi-response optimization obtained by assigning different importance to the responses can be applied for the roughing cut and final cut. Additivity test has been performed to validate the mathematical model developed by RSM. The developed mathematical models for spark gap and material removal rate will provide guidelines to the manufacturing engineers for prediction of spark gap and material removal rate in advance. The maximum material removal rate, i.e., 25.375 mm3/min and minimum spark gap, i.e., 0.017 mm indicate that the newly developed Al/ZrO2(p)-MMC can be effectively machined by wire EDM and can be used in aerospace industries. © 2015, The Brazilian Society of Mechanical Sciences and Engineering.
Singh P.,D. C. R. University of Science and Technology |
Kharb S.,JMIT |
Physics of Atomic Nuclei | Year: 2014
The effects of electric quadrupole (E2) and dipole-quadrupole interference (E1-E2) terms in the Coulomb breakup of 15C have been investigated within the framework of eikonal approximation. The sensitivity of Coulomb breakup cross section, differential in relative energy and Longitudinal Momentum Distribution (LMD) of core fragments, towards these terms have been examined. A very small (1% of E1) contribution of E2 transition has been predicted in integrated Coulomb breakup cross section. Further it is also found that the inclusion of E2 and E1-E2 terms introduces a small asymmetry in the peak of relative energy spectrum and also increases the peak height of the spectrum. The contribution of dipole-quadrupole interference terms is clearly shown in LMD, as it introduces an asymmetry in the shape of LMD and enhances the matching between the data and predictions. © 2014 Pleiades Publishing, Ltd.
Bawa R.K.,Punjabi University |
Communications in Computer and Information Science | Year: 2011
Over the last few decades the development of Internet and Grid technology has rapidly increased in the number of resources to which a user, program, or community may have access. When a large number of resources are available which fulfills the minimum criteria imposed by the user then the burden goes onto the user to select the best resource. Also a wrong resource selection imposes the overhead and cost burden on the user. So, an efficient and reliable resource selection is required which overcomes the burden of the user and selects the best resource. In this paper we proposed a two phase approach for efficient resource selection. The aim of this paper is to identify the most available, reliable and fastest resources for running an application. In this context, we introduced an approach for resource selection that maximizes the quality, reliability, and efficiency of resources and minimizes the other overhead. © 2011 Springer-Verlag.
Sharma A.,JMIT |
Garg M.P.,University of Punjab |
Goyal K.K.,Mm Engineering College |
Kumar A.,Mm Engineering College
International Journal of Machining and Machinability of Materials | Year: 2016
In recent years, more and more newer and hard to machine materials have been developed with an ever increasing demand of machining the complex shapes which has lead the conventional machining operations reach their limitations. In the present work, an attempt is made to machine the 6063 aluminium metal matrix composite, which is the combination of Al alloy 6063 reinforced with zirconium silicate 5% (i.e., Al 6063/ZrSiO4p ) using wire electrical discharge machining (WEDM). Experiments have been designed through Box-Behnken design (BBD) approach of response surface methodology (RSM). The empirical models for response characteristics viz. cutting rate and surface roughness have been developed considering the WEDM input process parameters. Analysis of variance (ANOVA) and F-test are performed to study the significance of process parameters on the response outputs. To aid in selecting the best combination of settings, the concept of desirability is utilised. Scanning electron microscopy (SEM) of machined surfaces is carried out to understand the effect of various process parameters on work piece material surface characteristics. The confirmation experiments have been conducted for the optimal parameters suggested by developed empirical models and it has been observed that the experimental results are in good agreement with the predicted results. © 2016 Inderscience Enterprises Ltd.
Malik S.,JMIT |
International Journal of Applied Engineering Research | Year: 2012
Image compression is a method through which we can reduce the storage space of images, videos which will helpful to increase storage and transmission process's performance. In image compression, we do not only concentrate on reducing size but also concentrate on doing it without losing quality and information of image. In this paper, we present the comparison of the performance of Discrete cosine transform, Discrete wavelet transform and wavelets like Haar Wavelet and Daubechies Wavelet for implementation in a still image compression system and to highlight the benefit of these transforms relating to today's methods. The performance of these transforms are compared in terms of Signal to noise ratio SNR, Mean squared error (MSE) and Energy Retained (ER) etc. © Research India Publications.
Dhamija A.,JMIT |
International Journal of Applied Engineering Research | Year: 2012
All-Optical means there is no need of optical-to-electrical conversion and this is the need of higher data rates and channel utilization in telecommunication systems. The designing parameters are more accurate and sensible if we are utilizing the non-linear characteristics of fiber like FWM, Cross gain modulation (XGM), Cross phase modulation(XPM). Semiconductor optical amplifiers are the basic constituent of all optical networks. © Research India Publications.
Dua A.,Kurukshetra University |
Gaurav G.,JMIT |
Balkar S.,P.A. College |
Mahajan R.,Kurukshetra University
International Journal of Research in Ayurveda and Pharmacy | Year: 2013
Antimicrobial properties of methanolic extract of cumin (Cuminum cyminum) seeds on four enteropathogenic and food-spoiler bacterial strains have been investigated. The cumin extract has been found to be effective against both gram positive and gram negative bacteria. Increase in absorbance between 260-280 nm indicates that incubation of bacterial cultures with cumin extract causes damage to their cell membranes and release of intracellular nucleotides and proteinaceous materials from the cells. The growth inhibition zones observed by agar well diffusion method were 10.7 to 14.0 mm in diameter in presence of cumin extract. Minimum concentrations of cumin extract effective against E,coli, P.aeruginosa, S.aureus and B.pumilus were found to be 12.5, 6.25, 25.0 and 6.25 mg dry weight per ml respectively. © 2010 IJRAP.
Kaushik A.,Panjab University |
Journal of Reinforced Plastics and Composites | Year: 2010
The epoxy-colloidal silica nanocomposites were prepared by directly blending a two pack system of Araldite (CY-230) and hardener (HY-951) with colloidal silica. As the colloidal silica powder was considerably fine, the weight percent was kept quite low. The silica content was varied from 1% to 3% by weight of the total matrix. These composites were then characterized for morphology using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and absorption kinetics in various solvents including distilled water, ethanol, acetone, carbon tetrachloride, and methylethylketone. Absorption kinetics was studied at two temperatures, that is, 30°C and 50°C. The SEM micrographs indicated the uniform distribution at lower concentrations, that is, up to 2% of colloidal silica. TGA results show improved thermal stability and increase in ash content with increase in silica content. Swelling kinetics shows that for most of the solvents the nature of diffusion is non-Fickian and as the silica content increases, deviation from Fickian behavior increases. Moreover, diffusivity decreases with increase in silica content but increases with temperature. Sorption values increases with silica content and also increase with temperature. Various reasons for deviation from Fickian behavior were studied. © 2010 The Author(s).