Dgvaishnav College

Chennai, India

Dgvaishnav College

Chennai, India
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Baboo S.S.,University of Madras | Vigneswari A.R.J.,Dgvaishnav College
International Journal of Engineering and Technology | Year: 2014

The paper deals with the computer based auto detection of particular species of sea turtles. In this process, three parameters have been taken and trained in artificial neural network for detecting the particular species among the popular seven species of the world. The existing algorithm for auto photo identification of detecting the particular species is much complicated due to classification process in the algorithm. To improve this algorithm, new technique has been used in feature extraction of the image and there are 10 images where trained and then finally particular species Olive Ridely is retrieved. These images are trained through artificial neural network and result of the images is plotted in the graphs.

Muthusundari S.,Sathyabama University | Santhosh Baboo S.,Dgvaishnav College
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering | Year: 2012

Generally, in encryption or decryption process some of the characters are inter changed by using some encryption and decryption algorithms with key.This paper puts focusing a safe mechanism for secured message passing to tackle the security problem of information. We propose a new technique to encrypt the text message by sorting technique. In our method, the encryption process which is carried out by the plain text is arranged in to alphabetical order by sorting procedure and produces the cipher text. The proposed encryption technique needs the ASCII value of the characters. This technique has two advantages over traditional schemes. First, the encryption and decryption procedures are very simple, and subsequently, much faster. Second, the security level is very high due to the ASCII value substitutions of alphabetic characters. In this paper, the encryption and decryption procedures are explained. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.

Vimalapriya M.D.,Sathyabama University | Santhosh Baboo S.,Dgvaishnav College
International Journal of Applied Engineering Research | Year: 2015

Wireless networks are gaining popularity to its peak today, as the users want wireless connectivity irrespective of their geographic position. There is an increasing threat of attacks on the Mobile Ad-hoc Networks (MANET). Most of the attacks in MANETs target the routing protocols. The mobility of nodes makes it more vulnerable to routing protocol attacks. By attacking the routing protocols, the attackers can absorb network traffic or inject themselves into the path between the source and destination. Some most recent attacks on the routing protocol in MANETs are Blackhole and Wormhole attacks. They actively participate in the network and conform to forward packets to the destination. In this paper, propose a method called Anomaly based behavior monitoring algorithm for black hole attack and Channel detection and cut defalconin for wormhole attack will detect the malicious nodes in a MANET. Possibly analyze the impact of these attacks on data communication when using a reactive routing protocol called Dynamic Source Routing (DSR) Protocol. The simulation shows that our proposed method has high reliability for detecting both black hole attack and wormhole attacks. © Research India Publications.

Gayathri K.,Presidency College at Chennai | Krishnan P.,Presidency College at Chennai | Sivakumar N.,Presidency College at Chennai | Sangeetha V.,Dgvaishnav College | Anbalagan G.,Presidency College at Chennai
Journal of Crystal Growth | Year: 2013

Brucinium hydrogen maleate (BHM) has been synthesized by the chemical reaction method. The solubility of the synthesized material was determined in water, acetone and water-acetone mixed solvents. Based on the solubility studies, the single crystals of BHM were grown from the 4:5 water-acetone mixed solvent by the solvent evaporation method. The crystallinity of the grown crystals was proved from the single crystal and powder XRD data. BHM was found to crystallize in monoclinic symmetry with non-centrosymmetric space group P21. BHM crystals of size 12×4×3 mm3 were obtained in 20 days. The compound exhibits good physicochemical stability upto 237.78 C. Various thermodynamical parameters were calculated from the TG data. The UV transparency cutoff wavelength of BHM was found to be 215 nm and the complex is transparent (42%) over the entire range of visible region showing that it is a good candidate for NLO applications. The growth feature of the BHM single crystals was observed by etching studies, which reveals the formation of layer growth pattern. The dielectric behavior of the grown crystal was analyzed for different frequencies at different temperatures. The mechanical properties of the crystal were estimated by Vickers hardness test. © 2013 Elsevier B.V.

Sivagami H.,Dgvaishnav College | Santhosh Baboo S.,Dgvaishnav College
International Journal of Applied Engineering Research | Year: 2015

This paper presents an image fusion technique for Sound Navigation and Ranging (Sonar) images. The image fusion technique is introduced to generate a clearly pictured sonar image. This method is based on the combination of Haar wavelet and Stationary wavelet transform. First, sonar images are affected by multiplicative speckle noise which is due to coherent nature of scattering phenomena. So, the noise is first removed based on the wavelet transform. After this process, despeckled source image is decomposed by using Haar wavelet and stationary wavelet. Wavelet fusion rule is based on the combination of low frequency band from Haar and stationary wavelet and combination of high frequency band from Haar and stationary wavelet. It incorporates the low frequency and high frequency of both the wavelet, then finally inverse stationary wavelet is used for image fusion. © Research India Publications.

Velmurugan T.,Dgvaishnav College | Santhanam T.,Dgvaishnav College
Journal of Theoretical and Applied Information Technology | Year: 2011

Data clustering is a process of putting similar data into groups. A clustering algorithm partitions a data set into several groups such that the similarity within a group is larger than among groups. In the field of data mining, various clustering algorithms are proved for their clustering quality. This research work deals with, two of the most representative clustering algorithms namely centroid based K-Medoids and representative object based Fuzzy C-Means are described and analyzed based on their basic approach using the distance between two data points. For both the algorithms, a set of n data points are given in a two-dimensional space and an integer K (the number of clusters) and the problem is to determine a set of n points in the given space called centers, so as to minimize the mean squared distance from each data point to its nearest center. The performance of the algorithms is investigated during different execution of the program for the given input data points. Based on experimental results the algorithms are compared regarding their clustering quality and their performance, which depends on the time complexity between the various numbers of clusters chosen by the end user. The total elapsed time to cluster all the data points and Clustering time for each cluster are also calculated in milliseconds and the results compared with one another. © 2005-2011 JATT & LLs All rights reserved.

Sangeetha V.,Dgvaishnav College | Gayathri K.,Presidency College at Chennai | Krishnan P.,Presidency College at Chennai | Sivakumar N.,Presidency College at Chennai | And 2 more authors.
Journal of Thermal Analysis and Calorimetry | Year: 2014

Single crystals of melaminium bis (hydrogen oxalate) (MOX) single crystals have been grown from aqueous solution by slow solvent evaporation method at room temperature. X-ray powder diffraction analysis confirms that MOX crystallises in monoclinic system with space group C2/c. The calculated lattice parameters are a = 20.075 ± 0.123 Å b = 8.477 ± 0.045 Å, c = 6.983 ± 0.015 Å, α = 90°, β = 102.6 ± 0.33°, γ = 90° and V = 1,159.73 (Å)3. Thermogravimetric analysis at three different heating rates 10, 15 and 20 °C min-1 has been done to study the thermal decomposition behaviour of the crystal. Non-isothermal studies on MOX reveal that the decomposition occurs in two stages. Kinetic parameters [effective activation energy (E a), pre-exponential factor (ln A)] of each stage were calculated by model-free method: Kissinger, Kim-Park and Flynn-Wall method and the results are discussed. A significant variation in effective activation energy (E a) with conversion progress (α) indicates that the process is kinetically complex. The linear relationship between the ln A and E a was established (compensation effect). DTA analyses were conducted at different heating rates and the activation energy was determined graphically from Kissinger and Ozawa equation. The average effective activation energy is calculated as 276 kJ mol-1 for the crystallization peak. The Avrami exponent for the crystallization peak temperature determined by Augis and Bennett method is found to be 1.95. This result indicates that the surface crystallization dominates overall crystallization. Dielectric study has also been done, and it is found that both dielectric constant and dielectric loss decreases with increase in frequency and is almost a constant at high frequency region. © 2014 Akadémiai Kiadó, Budapest, Hungary.

Sangeetha V.,Dgvaishnav College | Govindarajan M.,MGGA College | Kanagathara N.,Vel Tech Dr.RR & Dr.SR Technical University | Marchewka M.K.,Institute of Low Temperature And Structure Research | And 2 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2014

A new organic-organic salt, 3-nitrophenol-1,3,5-triazine-2,4,6-triamine (2/1) (3-NPM) has been synthesized by slow evaporation technique at room temperature. Single crystal X-ray diffraction analysis reveals that 3-NPM crystallizes in orthorhombic system with centrosymmetric space group Pbca and the lattice parameters are a = 15.5150(6) Å, b = 12.9137(6) Å, c = 17.8323(6) Å, α = β = γ = 90 and V = 3572.8(2) (Å)3. The geometry, fundamental vibrational frequencies are interpreted with the aid of structure optimization and normal coordinate force field calculations based on density functional theory (DFT) B3LYP/6-311G(d,p) method. IR and Raman spectra of 3-NPM have been recorded and analyzed. The complete vibrational assignments are made on the basis of potential energy distribution (PED). The electric dipole moment, polarizability and the first order hyperpolarizability values of the 3-NPM have been calculated. 1H and 13C NMR chemical shifts are calculated by using the gauge independent atomic orbital (GIAO) method with B3LYP method with 6-311G (d,p) basis set. Moreover, molecular electrostatic potential (MEP) and thermodynamic properties are performed. Mulliken and Natural charges of the title molecule are also calculated and interpreted. Thermal decomposition behavior of 3-NPM has been studied by means of thermogravimetric analysis. The dielectric measurements on the powdered sample have been carried out and the variation of dielectric constant and dielectric loss at different frequencies of the applied field has been studied and the results are discussed in detail. © 2013 Elsevier B.V. All rights reserved.

Sylaja B.,Dgvaishnav College | Srinivasan S.,Presidency College at Chennai
International Journal of ChemTech Research | Year: 2012

Semi embirical Austin Model 1, Ab initio and density functional computations of the vibrational IR spectrum and Molecular geometry were carried out on diazepam. The FTIR spectrum of diazepam was recorded in the region 4000-400 cm -1. Assignments were made in accordance with the calculated and experimental spectra. The observed IR spectrum agree well with the theoretically predicted spectra. The experimental geometry and wave numbers are compared with the results of theoretical calculations.

Gunasekaran S.,Periyar University | Anita B.,Dgvaishnav College
Indian Journal of Natural Products and Resources | Year: 2010

Herbal drug development includes various steps, starting from a passport data on raw materials, correct identification, pharmacognistic and chemical quality, standardization, safety and randomized clinical trials. Addressing standardization is vital and needs broader consideration. Adulteration in market samples and availability of sub-standard products is one of the greatest drawbacks in promotion of herbal products from India, therefore, present study was undertaken to evaluate the phytochemical variability in neem formulations available in the market. Five Ayurvedic formulations, containing neem as the main ingredient was chosen for the study. The samples were tested for the amount of limonoids like 2', 3' dehydrosalannol, salannin, nimbolide and azadiradione using HPLC (High-performance liquid chromatography) technique. The wide variations in the amount of the active principles in the samples highlight the need for stringent quality control measures in herbal industry.

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