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Raju A.U.,Mount Carmel College Autonomous | Balakrishnan J.,Bangalore University
Proceedings of 2014 International Conference on Contemporary Computing and Informatics, IC3I 2014 | Year: 2014

The Method of Moments (MoM) when applied for scattering analysis of a large body, generates a dense matrix. In this paper, a sparse matrix is generated from the dense matrix. The thresholding elemental method is applied to obtain a sparse matrix, by assuming that the electromagnetic interaction between sufficiently far away elements is zero. This technique is applied to compute the bistatic radar cross section (RCS) of canonical shapes and a complex shaped aircraft. It is found that for a maximum inaccuracy of 2 dBm2 in RCS, the amount of sparsity generated can be in the range of 40 to 75%, and the corresponding CPU time saving will be of the order of 8 to 34% for objects of different size. It is also observed from the analysis, that with increasing electrical size of the scatterer, the sparsity and hence saving in CPU time increases. © 2014 IEEE. Source


Jayaramaiah J.R.,Government First Grade College | Shamanth R.,Vijaya Vittala Institute of Technology | Jayanth V.,Siddaganga Institute of Technology | Shamala K.S.,Mount Carmel College Autonomous
Current Applied Physics | Year: 2016

Optical investigation on blue shift behavior of zinc doped cadmium sulphide nano-crystalline thin films have been prepared by spray pyrolysis method at 375 ± 10°C. The crystallinity and phase have been characterized by glancing angle X-ray diffraction. The XRD peaks confirm the hexagonal structure of cadmium sulphide. The crystallites sizes are found its range of 15-20 nm. The surface morphology is analyzed by using field emission scanning electron microscopy. The morphology of the film is seen as uniform distribution of homogeneous fine solid grains which are compact in nature. Optical absorption spectrum reveals an absorption peak at 475 nm. Indicating that blue shift due to quantum confinement effect, as a result the direct energy gap is increased and found its value is 2.91 eV. Raman spectrum reveals the longitudinal optical phonon peaks are at 302 cm-1 and 603 cm-1. The noticeable asymmetry and frequency shift confirm the decrease in particle size. X-ray photoelectron spectroscopy reveals the surface composition and binding energy of elements and it confirm the presence of zinc. The photoluminescence spectrum reveals an emission peak at 728 nm is analyzed. Zn doped cadmium sulphide thin film is useful for window material in solar cells and luminescent red phosphor. © 2016 Elsevier B.V. All rights reserved. Source


Balakrishnan K.P.,Research and Development Center | Narayanaswamy N.,Research and Development Center | Subba P.,Mount Carmel College Autonomous | Poornima E.H.,Mount Carmel College Autonomous
International Journal of Pharma and Bio Sciences | Year: 2011

The present investigation was conducted to evaluate the antibacterial efficacy of five medicinal plants against Propionibacterium acnes. The various solvent extracts of herbs namely Azadirachta indica, Vitex negundo, Annona squamosa, Cymbopogon citratus and Terminalia chebula were prepared by decoction method. The antiacne potential of various solvent extracts of herbs were tested along with the standard Clindamycin in a dose dependant manner by disc diffusion method. The results of the study found that aqueous and ethanolic extracts of Terminalia chebula exhibited the outstanding antiacne activity when compared to all other herbal extracts. Moderate zone of inhibition was observed in the medicinal plants namely Azadirachta indica, Vitex negundo and Annona squamosa. Inhibition zone was not detectable in any of the solvent extracts of Cymbopogon citratus. The findings of this study have identified that Terminalia chebula acts as the promising source of antiacne agent which could be useful in the treatment of acne vulgaris. Source


Sarika K.M.,Mount Carmel College | Aparajita V.,Mount Carmel College | Rani B.,Mount Carmel College | Soosamma M.,Mount Carmel College Autonomous
International Journal of Pharma and Bio Sciences | Year: 2013

Malassezia furfur, is a dermatophilic fungi that utilizes the secretions of the sebaceous glands for its growth and causes infections like dandruffand associated secondary infections. Herbal based treatments for dandruffare now gaining more significance over the conventional synthetic anti-dandruffremedies. In our study, efficacy of 23 medicinal plants for their antifungal activity was evaluated. Aqueous and ethanolic herbal extracts were used for the assay. The Minimum Inhibitory Concentration or MIC was determined as per guidelines laid down by Clinical and Laboratory Standards Institute and the antifungal activity was assayed by well diffusion method. In our study Malassezia furfur was found to be most susceptible to the aqueous extracts of Eugenia jambolana and least susceptible to Terminalia paniculata and among the ethanolic extracts it was most susceptible to Quisqualis indica and least susceptible to Terminalia paniculata. Source


Balakrishnan K.P.,Research and Development Center | Narayanaswamy N.,Research and Development Center | Mathews S.,Mount Carmel College Autonomous | Gurung K.,Mount Carmel College Autonomous
International Journal of Pharma and Bio Sciences | Year: 2011

Dandruff caused by Malassezia spp is controlled by antifungal agents. In the present study four medicinal plants- Terminalia bellerica, Terminalia chebula, Emblica officinalis and Lantana camara- were selected to check their antifungal activity. Their efficacy was tested using different concentrations of extracts in various solvents. The antifungal activity of the plant extracts was determined by well diffusion method. Among the four plants screened, Terminalia bellerica and Terminalia chebula exhibited good antifungal action against the test organism. Emblica officinalis and Lantana camara did not show significant antidandruff activity. Aqueous and ethanolic extract of a combination of Terminalia bellerica with Lantana camara, and Terminalia chebula with Lantana camara were tested for their synergistic antidandruff activity. Results of the synergistic studies indicated that synergy exists between ethanolic extracts of Terminalia chebula and Lantana camara. From the study, it was found that Terminalia bellerica and Terminalia chebula act as the good sources of antidandruff agents. Source

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