Sree Sakthi Engineering College

Coimbatore, India

Sree Sakthi Engineering College

Coimbatore, India
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Umaamaheshvari A.,Sree Sakthi Engineering College | Prabhakaran K.,Robert Bosch GmbH
International Review on Computers and Software | Year: 2013

Multimedia security has become an active area of research in recent years due to the extensive growth and development of multimedia data exchange on the internet. A number of security techniques have been developed to deal with the problems of attackers and hackers. But, most of the existing security approaches do not provide reliable results under certain attacks. This research work presents a novel technique to deal with the security problems. This research work uses the digital watermarking process which embeds the original information into a digitalized signal. Strength and reliability are the two important qualities in watermark embedding. But, digital watermarking has its own limitations wherein the insertion of the original information into the cover image and identification of the exact location without degradation of the original image quality is difficult. In order to solve the problem in digital watermarking, this research work proposes a biogeography algorithm with GA optimization to find the optimal allocation of location in images to embed information. But, Genetic optimization algorithm has certain limitations such as slow convergence, less accuracy, etc. Hence, this research work uses Biogeography Particle Swarm Optimization (BPSO) and Biogeography Firefly optimization (BFA). Experimental results are carried out with standard images and the performances of three methods are compared based on the parameters like MSE, SSIM and PSNR. It is observed that BFA shows best results to different threshold values which results in better visual quality of watermarked images. © 2013 Praise Worthy Prize S.r.l. - All rights reserved.


Krishnan V.G.,Sree Sakthi Engineering College | Purushothaman A.,Sree Sakthi Engineering College
Journal of Materials Science: Materials in Electronics | Year: 2017

In this work, effects of thickness towards volume proportion of TiO2 nanofilms were deposited on a glass substrate at 500 °C by using ANSP method. The optical profilometer shows the coated films thicknesses were increased (186, 234, 311, 397 and 433 nm) by increasing the volume proportion. Based on the thickness, The XRD reveals a polycrystalline tetragonal anatase phase with decreased particle sizes. The topographical study (AFM) of 3D surface view shows the incremented average roughness (Ra) values. The surface morphological variations with decremented particle size were examined by FESEM. The maximum transmittance ~78.5% (λ = 612.8 nm) is obtained to 186 nm thickness and further increment of thickness shows the decremented value of transmittance with an absorption edge shifted from lower to higher wavelength (blue shift) and the calculated band gap value Eg = 3.65–3.26 eV. The gas sensing performances of films was studied by using a various sensing parameters, obviously C2H6O gas shows highest response (Sm = 13% as 397 nm) at 300 °C for 150 ppm gas concentration against other gasses (NH3, CH4O, C3H8O and C3H6O). © 2017 Springer Science+Business Media New York


Gopala Krishnan V.,Sree Sakthi Engineering College | Purushothaman A.,Sree Sakthi Engineering College | Chandra Bose A.,National Institute of Technology Tiruchirappalli
Materials Chemistry and Physics | Year: 2017

SnxTi1-xO2 nanofilms deposited at 500 °C heated glass substrate by automated nebulizer spray pyrolysis method. Stabilized anatase phase of polycrystalline nature with decremented intensity were observed in XRD study, correspondingly precursor materials (Ti, Sn, O) were confirmed by XPS, EDS. The surface profilometer shows a coated films thickness and the surface morphology illustrates a various structure such as granular spherical shape, micro grain petal-like structure, a granular structure with wider petals (stripe likes) and void, crack less agglomerated grain particles were acquired with respect to Sn concentration. An optical study shows the maximum oscillating nature of transmittance is 66.8% (at = 524.4 nm) for Sn = 10.00% and the resultant transmittance values were enhanced and their sharp absorption edge shows blue shift by increase Sn concentration. Similarly, band gap values (Eg = 3.20 eV–3.56 eV) were increased due to Moss-Burstein shift. Notably, gas sensing performance of SnxTi1-xO2 shows the highest sensitivity behaviour to Sn = 5.00% (Y0.05Ti0.95O2) for reducing gas of C2H6O at 150 °C with 300 ppm gas concentration. All coated films exhibit the better sensitivity for ethanol (C2H6O) gas against other gases (CH4O, C3H8O, NH3, and C3H6O). © 2017 Elsevier B.V.


Gopala Krishnan V.,Sree Sakthi Engineering College | Ganesan V.,UGC-DAE Consortium for Scientific Research
Applied Physics A: Materials Science and Processing | Year: 2017

TiO2 nanofilms were deposited on a glass substrate at 500 °C using automated nebulizer spray pyrolysis. The anatase polycrystalline structure with increased grain size and variations of surfactant planes (Tc) were influenced by molar concentration on XRD study. AFM study shows the average roughness values were increased with increase in molar concentration. A granular domain like microstructure with crack and void-free particle was examined by FESEM. The maximum transmittance ~95.5% (529.6 nm) for x = 0.05 M/L, further increment of molar concentration showed the decremented transmittance with red shift absorption edge and the calculated band gap values (Eg = 3.53–3.20 eV) also noted. The gas sensing performances of films were studied with respect to various gas sensing parameters and the ammonia (NH3) gas showed better sensing response (Smax = 89%) at 150 °C for 300 ppm gas concentration against other gases (C2H6O, CH4O, C3H8O and C3H6O). © 2017, Springer-Verlag GmbH Germany.


Automated nebulizer sprayed Ba doped zinc oxide films were investigated. X-ray diffraction study reveals the polycrystalline hexagonal crystal structure with higher preferential orientation of (002). Compositional analysis of EDAX confirms the essential element of Ba, Zn and O. The FESEM shows the changes of spherical shape structure to flake net-like shape and sprout like spherical structure with average grain size is ∼100 nm due to the Ba concentration. The coated films are highly transparent in the visible region with a transmittance higher than 74%, and have an optical band gap energy values are increased from 3.22 eV to 4.02 eV depending on the Ba doping concentration. Interparticle like grains, grain boundary effect of deposited films is studied by complex impedance spectroscopy. The gas sensing response of BaxZn1-xO films shows NH3 > C2H6O > C3H6O with the function of temperature (50 °C to 350 °C) and gas concentration (100 ppm to 900 ppm). © 2017 Elsevier GmbH


Sivasakthivel P.S.,Kumaraguru College of Technology | Velmurugan V.,Sree Sakthi Engineering College | Sudhakaran R.,Kumaraguru College of Technology
International Journal of Advanced Manufacturing Technology | Year: 2011

Decreasing vibration amplitude during end milling process reduces tool wear and improves surface finish. Mathematical model has been developed to predict the acceleration amplitude of vibration in terms of machining parameters such as helix angle of cutting tool, spindle speed, feed rate, and axial and radial depth of cut. Central composite rotatable second-order response surface methodology was employed to create a mathematical model, and the adequacy of the model was verified using analysis of variance. The experiments were conducted on aluminum Al 6063 by high-speed steel end mill cutter, and acceleration amplitude was measured using FFT analyzer. The direct and interaction effect of the machining parameter with vibration amplitude were analyzed, which helped to select process parameter in order to reduce vibration, which ensures quality of milling. © 2010 Springer-Verlag London Limited.


Shyamala G.,Sree Sakthi Engineering College
International Journal of Earth Sciences and Engineering | Year: 2011

In the advent of modernization, pollution problems have also emerged in various forms. Effluent treatment involving biodegradable organic wastes can be treated biologically in most cases. Activated sludge process is used in the studies. The organic waste is introduced into a reactor where bacterial culture is kept in suspension. Sludge volume index is used to ascertain the settling characteristics. Settling studies were performed on dairy waste for different initial mean cell residence time and Mixed Liquor Suspended Solids (MLSS) concentrations. To prepare the sludge for various θc (7, 9, 11, 13 and 15) a batch reactor of 20 liters capacity was used (A bench scale settling tests). Further all these equations were combined to form a model connecting three parameters viz. Mixed liquor suspended solids concentration, Sludge Volume Index (SVI) and Mean Cell Residence time (MCRT). This model could be used to help the operator of ASP to compute the return sludge and also the sludge volume index values can help to maintain the desired underflow concentrations. © 2011 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.


Sudhakaran R.,Kumaraguru College of Technology | Vel Murugan V.,Sree Sakthi Engineering College | Sivasakthivel P.S.,SASTRA University | Balaji M.,Kumaraguru College of Technology
International Journal of Advanced Manufacturing Technology | Year: 2013

The prediction of delta ferrite content expressed in terms of ferrite number in austenitic stainless steel welds is very helpful in assessing its performance. The final ferrite content determines the properties of weldments such as strength, toughness, corrosion resistance, and phase stability. This paper presents a study on the effect of process parameters on ferrite number in 202 grade stainless steel gas tungsten arc welded plates (GTAW). Experiments were conducted based on response surface methodology. The ferrite number was determined by using a ferrite scope and by using DeLong diagram. A mathematical model was developed correlating the important controllable GTAW process parameters like welding gun angle, welding speed, plate length, welding current, and shielding gas flow rate with ferrite number. The adequacy of the model was checked using analysis of variance technique. The developed model is very useful to quantitatively determine the ferrite number. The main and interaction effects of the process parameters are presented in graphical form that helps in selecting quickly the process parameters to achieve the desired results. © 2012 Springer-Verlag London Limited.


Swaminathen A.N.,Sree Sakthi Engineering College | Robert Ravi S.,PSR Engineering College
International Journal of Applied Engineering Research | Year: 2016

In recent years, the usage of Rice husk ash (RHA) and Metakaoilin (MK) as a pozzolonic material for the preparation of cement concrete had become more important than any other material. The manufacture of Portland cement (PC) is not eco friendly; the content of pozzolonic material in cement mortar exhibits a considerable increase in strength and durability properties. This paper gives a review about the use of RHA and MK as not only a partial replacement for cement but also a replacement for the influence of toxic waste. The collection of literature survey report elaborated that the usage of RHA and MK is an efficacious mineral admixtures, which cause a large betterment in the filling of pore structures. In addition to this it increases the resistance of the concrete to environmental effects, and gives better solutions for the abundant waste of RHA produced from Agricultural product in India. © Research India Publications.


Sivasakthivel P.S.,SASTRA University | Murugan V.V.,Sree Sakthi Engineering College | Sudhakaran R.,Kumaraguru College of Technology
International Journal of Manufacturing Research | Year: 2012

This paper presents a study on the effect of process parameter on surface roughness in end milling process. Response surface methodology was employed to create a model to predict surface roughness in terms of machining parameters such as helix angle of cutting tool, spindle speed, feed rate, axial and radial depth of cut. The experiments were conducted on Al 6063 by HSS end mill cutter and surface roughness value was measured using Surftest SJ201. The adequacy of the model was verified using analysis of variance. The direct and interaction effect of the machining parameter with surface roughness were analysed. Neural network model was developed to predict surface roughness. Error percentages of both predicted response of response surface and neural model are found to be less than 5%. Copyright © 2012 Inderscience Enterprises Ltd.

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