Sri Sivasubramaniya Nadar College of Engineering , popularly known as SSN, is an engineering institution located in Chennai, Tamil Nadu, India. The college is certified to ISO 9001:2000 standard by the National Board of Accreditation. Wikipedia.
Ramalingam A.,SSN College of Engineering
Journal of Molecular Liquids | Year: 2017
In this work, the fundamental nature of the interaction between pyrrole and pyridine with 1-ethyl-3-methylimidazolium ethylsulphate ([EMIM][EtSO4]) was investigated using DFT theory and was confirmed with the sigma profile analysis via Conductor-like Screening MOdel for Real Solvent (COSMO-RS) approach. Geometry optimization was performed at density functional theory with B3LYP functional, and 6–311 + G* basis set for individual species and complexes of neat [EMIM][EtSO4] with pyrrole/pyridine. Thereafter, the partial charges and interaction energy were derived. The amount of charge transfers in [EMIM][EtSO4] + pyrrole was found to be ~ 20% more than in [EMIM][EtSO4] + pyridine, indicating that CH[sbnd]π interaction was stronger with pyrrole than with pyridine. The interaction energy for the complex [EMIM][EtSO4] + pyrrole was more negative than that of [EMIM][EtSO4] + pyridine, which implies that [EMIM][EtSO4] has a more favourable interaction with pyrrole than with pyridine. © 2017 Elsevier B.V.
Radha N.,SSN College of Engineering
Proceedings of the International Conference on Inventive Computation Technologies, ICICT 2016 | Year: 2017
This paper presents an analysis process of lecture video retrieval with automated video indexing and video search for lecture video databases. The video retrieval extracts the relevant metadata from the two main parts of lecture videos, namely the visual screen and audio tracks. From the visual screen, we firstly detect the slide transition and extract each unique slide frame with its temporal transition considered as the video segment. The textual metadata from slide frames is extracted and then recognized using video OCR technique. Based on OCR results, the corresponding text in video information is saved. Secondly, the speech-to-text analysis is carried out from the audio signal. Sphinx speech recognition models are used for recognition of speech-to-text conversion process. In the proposed work, the combined text information from the visual slide frame and audio signal were used to retrieve the video from the lecture video database. The performance of this combined video retrieval system shows a significant improvement in performance when compared with an individual system built using audio and text in video systems respectively. © 2016 IEEE.
Suganthi N.,SSN College of Engineering
Journal of environmental science & engineering | Year: 2011
The adsorption of Ni(II) and Pb(II) from aqueous solutions by Phosphorylated Tamarind Nut Carbon (PTNC) was investigated. The effects of contact time, pH and carbon dose were studied in batch experiments at 30 degrees C. The equilibrium process was determined by Freundlich and Langmuir isotherm models. The kinetic studies showed good correlation for a pseudo-second-order kinetic model. Column studies were conducted in 2.5cm diameter columns. The applicability of PTNC for wastewaters containing Ni(II) and Pb(II) was evaluated. The mechanism of adsorption of metals on PTNC was found to follow ion exchange process predominantly and was supported by FTIR. The metal removal was also confirmed by SEM studies.
Sathiyamoorthy M.,SSN College of Engineering |
Chamkha A.,Public Authority for Applied Education and Training
International Journal of Thermal Sciences | Year: 2010
A numerical study is presented for natural convection flow of electrically conducting liquid gallium in a square cavity. In the cavity, the bottom wall is uniformly heated and the left vertical wall is linearly heated whereas the right vertical wall is linearly heated or cooled while the top wall kept thermally insulated. A uniform magnetic field inclined at an angle φ with respect to horizontal plane is externally imposed. Penalty finite element method with bi-quadratic rectangular elements is used to solve the non-dimensional governing equations. Numerical results are presented for wide range of Hartmann number (Ha = 0-100) with inclined angles (φ=0,π/2) for high Rayleigh number Ra = 105 in terms of stream functions and isotherm contours, local and average Nusselt number. The results shows that the magnetic field with inclined angle has effects on the flow and heat transfer rates in the cavity. It is also found that the average Nusselt number decreases non-linearly by increasing Hartmann number for any inclined angle. © 2010 Elsevier Masson SAS. All rights reserved.
Balaji M.,SSN College of Engineering |
Kamaraj V.,SSN College of Engineering
International Journal of Electrical Power and Energy Systems | Year: 2012
This paper presents the application of elitist Non-dominated Sorting Genetic Algorithm version II (NSGA-II) to determine optimum pole shape design for performance enhancement of Switched Reluctance Machine (SRM). In SRM, torque output and torque ripple are sensitive to stator and rotor pole arcs and their selection is a vital part of SRM design process. The problem of determining optimal pole arc is formulated as a multi-objective optimization problem with the objective of maximizing average torque, minimizing torque ripple and copper loss. In order to account for the geometry as well as for the nonlinearity of material utilized, the Finite Element Method (FEM) is used to determine the performance of the machine. The proposed optimization technique is applied to determine optimal pole shape of an 8/6, four-phase, 5 HP, 1500 rpm SRM. The results show the effectiveness of the proposed approach and confirm the application of NSGA-II as a promising tool for solving SRM design problems. The results obtained by NSGA-II are compared and validated with classical multi-objective approach based on weighted sum method using Differential Evolution (DE) algorithm. © 2012 Elsevier Ltd. All rights reserved.
Senthil Pandian M.,SSN College of Engineering |
Ramasamy P.,SSN College of Engineering
Journal of Crystal Growth | Year: 2010
Diglycine zinc chloride, a semi-organic nonlinear optical crystal was grown by conventional slow evaporation and Sankaranarayanan-Ramasamy method. By employing this unidirectional method, diglycine zinc chloride single crystals of diameters 10, 30 and length up to 60 mm were grown. The growth conditions have been optimized. A maximum growth rate of 1.5 mm per day was realized. A comparative damage threshold analysis made on the diglycine zinc chloride crystals by conventional and unidirectional method shows that the crystal grown by Sankaranarayanan-Ramasamy method has higher damage threshold. The conventional and Sankaranarayanan-Ramasamy method grown diglycine zinc chloride crystals were also characterized by chemical etching, UV-vis analysis, dielectric constant, dielectric loss, Vicker's microhardness analysis and the results were compared. The present study indicates that the crystal quality of Sankaranarayanan-Ramasamy method grown diglycine zinc chloride is good compared to conventional slow evaporation method grown crystal. © 2009 Elsevier B.V. All rights reserved.
Sriraam N.,SSN College of Engineering
Expert Systems with Applications | Year: 2012
Auditory dysfunction is one of the most common deficiencies present in the newborn. Recent studies show that significant bilateral hearing loss is present in ∼1 to 3 per 1000 newborn infants in the well-baby nursery population and in ∼2 to 4 per 1000 infants in the ICU population. The ignorance of hearing screening test at the initial stage will impede speech, language and cognitive development. It has been further noted that direct physician observation as well as parental recognition has not been significantly successful until today in identifying the hearing loss in the first year of life. To overcome such problems, early screening is essential. This paper presents a pilot study on detection of hearing loss by applying electroencephalography (EEG) signals as the key indicator. The effect of auditory evoked potential (AEP) is exploited on EEGs by introducing an external stimulus to the subject's auditory canal. Two time domain features, spike rhythmicity, autoregressive model using Levinson-Durbin algorithm and frequency domain features such as power spectral density estimation by Burg's and Yule-Walker methods are applied. Feed forward and feedback neural network models are used to distinguish the stimuli and non-stimuli EEGs. The neural network models are configured optimally by varying the hidden neurons and learning algorithms and their performance are evaluated in terms of specificity, sensitivity and classification accuracy. It can be concluded from the experimental study that the proposed methodology can be applied for neonatal healthcare applications. © 2011 Elsevier Ltd. All rights reserved.
Phamila Y.A.V.,SSN College of Engineering |
Amutha R.,SSN College of Engineering
Signal Processing | Year: 2014
This paper presents a simple and efficient multi-focus image fusion scheme explicitly designed for wireless visual sensor systems equipped with resource constrained, battery powered image sensors employed in surveillance, hazardous environment like battlefields etc. Here the fusion of multi-focus images is based on higher valued Alternating Current (AC) coefficients calculated in Discrete Cosine Transform (DCT) domain. The proposed method overcomes the computation and energy limitation of low power devices and is investigated in terms of image quality and computation energy. Simulations are performed using Atmel Atmega128 processor of Mica 2 mote to measure the resultant energy savings. The experimental results verify the significant efficiency improvement of the proposed method in output quality and energy consumption, when compared with other fusion techniques in DCT domain. © 2013 Elsevier B.V.
Senthil Kumar P.,SSN College of Engineering
Colloid Journal | Year: 2010
Neem sawdust was used to develop an effective carbon adsorbent. This adsorbent was used for the removal of Congo Red (CR) from aqueous solution. The data suggest that the pH of aqueous solutions influences CR removal due to the decrease of removal efficiency with increasing pH. An optimal pH < 3 for the adsorption of CR onto neem sawdust carbon (NSDC) was determined. The experimental data were analysed by the Langmuir, Freundlich, Redlich-Peterson, Toth, Temkin, Sips and Dubinin-Radushkevich models of adsorption. Three simplified kinetic models based on pseudo-first-order, pseudo-second-order and intraparticle diffusion equations were used to describe the adsorption process. It was shown that the adsorption of CR could be described by the pseudo-second-order equation, suggesting that the adsorption occurs as a chemisorption process. The results indicate that the NSDC can be used as a low cost adsorbent alternative to commercial activated carbon for the removal of dyes from wastewaters. © 2010 Pleiades Publishing, Ltd.
Pandian M.S.,SSN College of Engineering |
Ramasamy P.,SSN College of Engineering
Materials Chemistry and Physics | Year: 2012
A transparent uniaxial sodium sulfanilate dihydrate (SSDH) single crystal having dimension of 30 mm diameter and 100 mm length was grown by Sankaranarayanan-Ramasamy (SR) method with a growth rate of 1 mm per day. Using an identical solution the conventional crystal grown to a dimension of 12 mm ×20 mm ×5 mm was obtained over a period of 20 days. The crystal structure has been confirmed by single crystal X-ray diffraction (XRD) measurement. The crystalline perfection of sodium sulfanilate dihydrate crystals grown by slow evaporation solution technique (SEST) and SR method were characterized using chemical etching, laser damage threshold, Vickers microhardness, UV-vis NIR, birefringence and dielectric analysis. The above study indicates that the crystal quality of the Sankaranarayanan-Ramasamy (SR) method grown sodium sulfanilate dihydrate is good compared to conventional solution method grown SSDH crystal. The growth features of inclusions, low angle grain boundaries, twins and micro-cracks have been observed in conventional method grown SSDH crystals. The dielectric tensor components for unidirectional method grown sodium sulfanilate dihydrate single crystal were evaluated as a function of temperature at 100 Hz frequency. © 2011 Elsevier B.V. All rights reserved.