Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 190 )

2018 ( 288 )

2017 ( 313 )

2016 ( 388 )

Custom range...

Search Results: 1 - 10 of 138773 matches for " K. Thenmozhi "
All listed articles are free for downloading (OA Articles)
Page 1 /138773
Display every page Item
Wavelet Supersede FFT in MB-OFDM: an Effective Cognitive Spectrum Sensing
J. Avila,K. Thenmozhi
Journal of Artificial Intelligence , 2012,
Abstract: The curiosity of human on wireless devices is expanding exorbitantly, emphasizing high data rates and band width requirements. Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) is the technique that victuals high data rate. Studies manifests that most of the licensed bands are not exercised in an efficient way thereby leading to the progression of cognitive radio which allows the secondary users to access and activate the free band of primary users. Moreover, sensing the free holes is the prior concern in CR cycle. With the existence of diverse spectrum sensing methods each with its own pros and cons, this study is mainly subjected about the enhancement of energy detection method owing to its ease, simplicity and monotony. The Fast Fourier Transform (FFT) block of the above method is replaced with Discrete Wavelet Transform (DWT) as it can operate in both time and frequency domains. Four wavelet families are discussed in this study. The results are perceived from the probability of detection (pd) versus Signal to Noise Ratio (SNR) graph.
Studies on Isolation, Classification and Phylogenetic Characterization of Novel Antifungal Streptomyces sp. VITSTK7 in India
K. Kannabiran,M. Thenmozhi
Current Research Journal of Biological Sciences , 2010,
Abstract: The aim of the study was to screen the antifungal activity of the crude extract prepared from the strain Streptomyces spp. VITSTK7 against Aspergillus sp. and to characterize the isolate. A total of 8 strains were isolated from the marine sediments collected at the Puducherry coast, India. All the eight strains were primarily screened for antifungal activity against three species of Aspergillus namely A. fumigatus, A. niger and A. flavus. Our search resulted in the isolation of a potential strain VITSTK7. The production media was optimized for maximum yield of secondary metabolites. The metabolites were extracted using ethyl acetate, lyophilized and screened for antifungal activity against the three Aspergillus species by well diffusion method. A maximum zone of inhibition (21 mm) was observed for A. fumigatus in comparison with the standard antifungal antibiotic Nystatin (20 mm). This potential strain was further identified based on Hideo Nonomura classification. A phylogenetic tree was constructed by maximum parsimony method to identify up to the species level. Molecular taxonomy and phylogeny revealed that the strain belonged to the genus Streptomyces and was designated as Streptomyces spp.VITSTK7. Blast search of the 16s rRNA sequence of the strain with the sequences available in the NCBI data bank showed a maximum similarity of 86% with Streptomyces longisporoflavus (DQ 442520) with the bootstrap value of 100. The 16s rRNA sequence of the strain Streptomyces spp.VITSTK7 was submitted to the GenBank under the accession number GQ 499369. The secondary structure of 16s rRNA and the restriction sites were also predicted using Genebee and NeBCutter online softwares, respectively.
Fuzzy Based Task Scheduling for Hierarchical Resource Allocation in Mobile Grid Environment
S. Thenmozhi,A. Tamilarasi,K. Thangavel
International Journal of Soft Computing , 2012, DOI: 10.3923/ijscomp.2012.97.103
Abstract: In mobile grid environment, the main challenging issues are scheduling, adaptation, security and mobility. The job scheduling problem becomes more complicated due to the limitations of node mobility. In order to minimize the resource utilization, gaining the maximum profit to be cost effective and satisfying the user constraints, an efficient job scheduling technique is required for mobile grid environment. In this study, researchers propose a fuzzy based task scheduling algorithm for resource allocation depending upon the workload and the resource availability of the grid members. In this scheduling, the computation sensitive task is assigned for grid members with least workload and the communication sensitive task is assigned for grid members with high resource availability. Using the workload and resource availability as input variables, fuzzy decision rule table is created. After defuzzification, the output gives us a perfect matching for scheduling the tasks according to the load and availability. Thus, the algorithm proves to be more effective in task scheduling of mobile grids. From the simulation results, researchers show that the proposed scheduling technique attained maximum throughput and less delay when compared with the existing technique.
Web Caching and Response Time Optimization Based On Eviction Method
International Journal of Innovative Research in Science, Engineering and Technology , 2013,
Abstract: Caching is a technique first used by memory management to reduce bus traffic and latency of data access. Web traffic has increased tremendously since the beginning of the 1990s.With the significant increase of Web traffic, caching techniques are applied to Web caching to reduce network traffic, user perceived latency, and server load by caching the documents in local proxies. In this paper, analization of both advantages and disadvantages of some current Web cache replacement algorithms including lowest relative value algorithm, least weighted usage algorithm and least unified-value (LUV) algorithm is done. Based on our analysis, we proposed a new algorithm, called least grade replacement (LGR), which takes recency, frequency, perfect-history, and document size into account for Web cache optimization. The optimal recency coefficients were determined by using 2- and 4-way set associative caches. The cache size was varied from 32 k to 256 k in the simulation. The simulation results showed that the new algorithm (LGR) is better than LRU and LFU in terms of hit ratio (BR) and byte hit ratio (BHR).
International Journal of Engineering Science and Technology , 2010,
Abstract: In order to evaluate the performance of soil and rubber waste mix as subgrade material, static and repeated load tests were conducted on soil and rubber waste in four different layer forms as well intermixedcombination. Rubber chips of 30 - 40 mm were used. It is found that load carrying capacity of the soil + RW + soil layer and soil + RW inter mix are found to be better than the other combinations such as soil + soil + RW or soil + RW + RW, both in reinforced and nreinforced case. The soil+RW+soil or soil+RW inter mix can be effectively used in order to reduce the plastic deformation that the subgrade clay undergoes and also to enhance the recoverable elastic strain. The placement of geogrid reinforcement at the interfaces of soil and RW layer improved not only the load carrying capacity but also very much the recoverable elastic strain.
S. Thenmozhi,A. SubbiahPandi,V. Dhayalan,A. K. MohanaKrishnan
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810010044
Abstract: In the title compound, C24H15NO2S2, the ring system composed of the five fused rings is almost planar (r.m.s. deviation for all non-H atoms = 0.056 ). The dihedral angle between the fused ring system and the phenyl ring is 83.4 (9)°. The crystal packing is stabilized by C—H...π and π–π interactions between parallel ring systems [centroid–centroid distances = 3.526 (3), 3.877 (3) and 3.712 (3) ].
S. Thenmozhi,A. SubbiahPandi,J. Arulclement,A. K. MohanaKrishnan
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810010068
Abstract: In the title compound, C19H12O4, the dioxole ring adopts a flattened envelope conformation with the methylene C at the flap [deviation = 0.104 (2) ]. The benzene ring of the benzodioxole ring system makes a dihedral angle of 76.45 (5)° with the planar [maximum deviation = 0.016 (1) ] 3H-benzo[f]isobenzofuran-1-one ring system. In the crystal structure, the molecules are linked into C(5) chains running along the b axis by intermolecular C—H...O hydrogen bonds. In addition, C—H...π interactions are observed.
S. Thenmozhi,A. SubbiahPandi,V. Dhayalan,A. K. MohanaKrishnan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809012525
Abstract: In the title compound, C23H20N2O3S2, the phenylsulfonyl ring and phenylthio ring make dihedral angles of 66.5 (7) and 81.2 (6)°, respectively, with the indole unit. In the crystal, molecules are linked into centrosymmetric dimers via pairs of N—H...O hydrogen bonds with graph-set motif R22(14). The crystal structure is further stabilized by weak intermolecular C—H...O and very weak C—H...π interactions.
Diethyl 2-[(5-methoxy-2-methyl-1-phenylsulfonyl-1H-indol-3-yl)methylene]malonate
T. Kavitha,M. Thenmozhi,V. Dhayalan,A. K. Mohanakrishnan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809019369
Abstract: In the title compound, C24H25NO7S, the sulfonyl-bound phenyl ring is approximately perpendicular to the indole ring system [dihedral angle = 87.72 (5)°]. The methyl group of one of the ester units is disordered over two positions with occupancies of 0.527 (13) and 0.473 (13). An intramolecular C—H...O hydrogen bond is observed. In the crystal structure, molecules are linked into a ribbon structure running along the c axis by intermolecular C—H...O hydrogen bonds and C—H...π interactions involving the pyrrole ring.
T. Kavitha,M. Thenmozhi,V. Dhayalan,A. K. Mohanakrishnan
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809010046
Abstract: There are two crystallographically independent molecules in the asymmetric unit of the title compound, C23H21NO3S. The indole ring system is approximately perpendicular to the sulfonyl phenyl ring in both molecules [dihedral angles = 85.42 (8) and 88.30 (9)°]. C—H...O interactions between molecules stabilize the crystal structure.
Page 1 /138773
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.