Vel Technology Multi Technology

Chennai, India

Vel Technology Multi Technology

Chennai, India
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Joseph J.,National Institute of Technology Raipur | Jayaraman S.,Vel Technology Multi Technology | Periyasamy R.,National Institute of Technology Raipur
Current Medical Imaging Reviews | Year: 2016

Background: Edge preserving filters are widely preferred for medical image denoising as they do not degrade the morphological edges during smoothing. Even though, the operational parameters of these filters have crucial influence on their performance, the parameters are selected subjectively. The optimum values of the operational parameters can be selected objectively with the help of edge quality indices. The available edge quality indices either do not comply with the subjective quality ratings or they are prone to noise level. Objectives: (a) To formulate an edge preservation metric which has good correlation with subjective fidelity ratings and is robust to noise (b) To demonstrate an objective method for the selection of optimum values of the operational parameters of the non-linear spatial filters using the newly formulated edge preservation metric. Methods: Pratt’s Figure of Merit (PFOM) between the binary edge maps of the original and restored images, extracted via gradient based threshold, is used as the measure of extent to which edges are preserved during restoration. Magnetic Resonance (MR) images filtered by anisotropic diffusion for different values of number of iterations are used as ground truth images. The PFOM is compared with existing edge quality indices in terms of robustness to noise and correlation with subjective fidelity ratings. Results: PFOM exhibits a correlation of 0.9998 with the subjective edge quality rating which is only 0.9802 for Edge Preservation Index (EPI). Conclusion: The proposed index is robust to noise level and useful for optimizing the performance of non-linear spatial filters. © 2016 Bentham Science Publishers.

Kuppusamy P.G.,Vel Technology Multi Technology
Journal of Computational and Theoretical Nanoscience | Year: 2017

An investigation of the fundus images acting an essential process in the field of Ophthalmology in finding the ophthalmologic disorders. Most of the eye diseases show off themselves in the retina. This paper therefore focuses on the retinal image analysis and its implications. Among all the eye disorders, Glaucoma is one of the most prevalent causes of blindness and in which the optic nerve is getting damaged due to excessive intraocular pressure. This paper gives an idea to find the Glaucoma disease by segmentation of optic disc and blood vessels using edge and gradient level segmentation algorithm. BAT algorithm is utilized for thresholding of the image. ANN (Artificial Neural Network) is employed in detecting the presence of Glaucoma which involves the training and testing process. SVM (Support Vector Machine) is applied in order to classify the approximate stage of Glaucoma. By comparing the normal image and extracted image features like area, the optic disc and blood vessels are identified and measured accurately. The area of Glaucoma is measured and from that the stage of Glaucoma is provided. The accuracy attained was 98%. Copyright © 2017 American Scientific Publishers All rights reserved.

Sanmugam A.,Vel Technology Multi Technology | Sanmugam A.,Alagappa University | Vikraman D.,Dongguk University | Venkatesan S.,Alagappa University | Park H.J.,Ajou University
Journal of Nanomaterials | Year: 2017

The objective of this work is to develop an environmentally friendly method for preparation of ZnO nanocomposites. ZnO nanocomposites were prepared by three natural fibers such as coir, sawdust, and chitosan using aqueous solution of zinc chloride and sodium hydroxide. The functional groups of ZnO, C=O for polysaccharide, and N-H bending vibration of amine were confirmed by FTIR spectroscopy. A new high intensity absorption band has been observed at 424 cm-1 which corresponds to the E2 mode of hexagonal ZnO. The crystallinity and phase formation of coir, chitosan, and sawdust combined ZnO nanocomposites were confirmed by X-ray diffraction patterns. XRD patterns revealed the polycrystalline nature of ZnO composites belonging to the hexagonal phase with (101) preferential lattice orientation. The microstructural parameters were calculated for coir, chitosan, and saw wood combined ZnO composites. Also texture coefficients were estimated for all the diffraction lines of ZnO based nanocomposites. SEM and TEM analyses confirmed evenly distributed nanosized grains in the ZnO composites. The UV-Vis absorption spectra were observed where the blue shift absorption peak was at 334 nm. The optical band gap values were estimated in the range of 3.18-3.26 eV. The emission peak was observed at 388 nm and 463 nm by photoluminescence spectroscopy. Copyright © 2017 Anandhavelu Sanmugam et al.

Jayaraman S.,Vel Technology Multi Technology | Sangareddi V.,Rajiv Gandhi Government General Hospital | Periyasamy R.,National Institute of Technology Raipur | Joseph J.,National Institute of Technology Raipur | Shanmugam R.M.,Rajiv Gandhi Government General Hospital
Anatolian Journal of Cardiology | Year: 2017

Objective: Modified Limb Lead (MLL) ECG system may be used during rest or exercise ECG, or atrial activity enhancement. Because of modification in the limb electrode placement, changes are likely to happen in ECG wave amplitudes and frontal plane axis, which may alter the clinical limits of normality and ECG diagnostic criteria. The present study investigated the effects of the modified limb electrode position on the electrocardiographic waveforms, ST segment amplitudes (STa) and frontal plane axis. Methods: The observational study included sixty sinus rhythm subjects of mean age 38.85±8.76 (SD) in the range 25 to 58 years. In addition to 12-lead ECG, MLL ECG was recorded with, the RA electrode placed in the 3rd right intercostal space to the right of the parasternal line, the LA electrode placed in the 5th right intercostal space to the right of the mid-clavicular line and the LL electrode placed in the 5th right intercostal space on the mid-clavicular line. Results: The modification produced profound changes in ECG wave amplitudes and STa amplitudes in frontal plane leads. The QRS and T wave axis shifted on the average by –17o and 41o, respectively, with considerable individual variation, which altered the diagnostic criteria. Conclusion: The ECG amplitudes and STa changes produced by the MLL system showed that all remains within the clinical limits, except the R wave amplitude in the modified lead I. It is evident that the MLL system produced deviations in frontal plane QRS axis which altered the diagnostic interpretation. © 2017 by Turkish Society of Cardiology.

Chandralekha R.,Vel Technology Multi Technology | Jayanthi D.,Vel Technology Multi Technology
International Journal of Applied Engineering Research | Year: 2016

Three Phase Induction motor is the major running part in the Industries and is the most used electrical machines. Hence detection of faults in the motor is very important in order to improve the performance of the induction motor, avoid the production lost and also to reduce the operational costs. The methods used for this process is mainly based on measuring and analyzing the vibration and current. Here, a novel technique based on the stray flux measurement different positions around the electrical machines is proposed. The main objective of the proposal is to detect the faults in induction motor due to electrical and mechanical origin by vibration analysis. The paper gives justification for the change in machine vibration due to the change in voltage harmonics; this will help to find the fault in induction motor. The main aim is to present a new approach to find the rotor bar failures. The method focuses on the study of an approximation signal resulting from the wavelet decomposition of the start-up stator current using Neuro Fuzzy Logic. © Research India Publications.

Joseph J.,National Institute of Technology Raipur | Sivaraman J.,Vel Technology Multi Technology | Periyasamy R.,National Institute of Technology Raipur
Journal of Medical Imaging and Health Informatics | Year: 2016

The noise suppression and edge preservation offered by Nonlocal Means (NLM) filter depends on the selection of decay control parameter and radii of search and similarity windows. If the decay control parameter is too small then little noise will be removed, while if it is too high, the image becomes blurry. Empirical selection of the filter parameters are always subjective and may be far from optimal. The present study demonstrates an automated method to compute decay control parameter from the noise estimate and an objective method to identify the optimum values of operational parameters using modified Pratt's Figure of Merit (PFOM) on Magnetic Resonance (MR) images. The decay control parameter is computed as the product of standard deviation of the noise and an arbitrary constant, termed as coefficient of noise variance. The radii of search, similarity windows and coefficient of noise variance which offer maximum noise suppression with minimum edge degradation were identified on multiple MR images with different textural and noise content. It has been observed that regardless of the textural and noise content of the MR image, the optimum range of coefficient of noise variance lies between four and eight, typically at seven. For MR images, the minimum radii of similarity and search windows should be greater than three, beyond which the radii has no significant influence on the performance of NLM, provided the radius of search window should be sufficiently larger than radius of similarity window, typically four times. Since the radii of search, similarity windows and coefficient of noise variance is robust to textural and noise content of the MR image, the computed decay control parameter depends only on the standard deviation of the noise. Hence, the proposed NLM is fully noise adaptive. The experimental analysis was performed in Matlab®. Copyright © 2016 American Scientific Publishers All rights reserved.

S Muthukumar S.,Vel Technology Multi Technology | Mathiyalagan P.,Vel Technology University
International Journal of Applied Engineering Research | Year: 2015

The wear resistance of material is an important requirement for many of the automotive, aircraft and aerospace components. In the present work abrasive and additive wear behaviour of Al-SiCp composites with different tests were studied. The Pin-on Disc wear testing machine has been fabricated to study the friction and wear behaviour of the Al-SiCp composites conditions. Also to study the characteristic friction and wear behaviour of Al-SiCp composite for application to engine parts under reciprocation conditions. The composites were manufactured by hot liquid infiltration technique. They concluded that fiber reinforcement significantly improved the abrasion résistance in mild abrasive situations; the abrasion resistance of the composites was equal to or, in some cases, even lower than that of the unreinforced materials. © Research India Publications.

Vidya K.,Vel Technology Multi Technology | Gayathri R.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

Railway network provides the most crucial mode of social transportation over the world. Many technologies have been developed to prevent railway accidents but still the major accidents occurring in railway network. The scope of sensing technologies has distended quickly, hence the sensor devices becomes more efficient and cheaper. In this paper, to avoid the major accidents due to derailment and obstacles, the conditioning of tracks and tunnels will be continuously monitored by using WSN. The faults in rail tracks will be detected by using an IR Sensor testing methodology and obstacles in tunnels detected by Ultrasonic Sensor, hence it will reduce the manual inspection necessities and maintenances. The sensed data will send to the control room through wireless transceiver and the exact location of fault will be identified by using GPS. To avoid the minor accidents, the footboard travelling will be monitored by using an IR and Camera. The captured image will be passed to the next station control room through E-mail. The proposed work is implemented using an advanced Raspberry pi model with inbuilt ARM microcontroller LPC2138. The main objective of this paper to upgrade the safety and authenticity of railway network, hence this will lead to a vital development of our country. © International Science Press.

Kuppusamy P.G.,Vel Technology Multi Technology | Gopal B.G.,Vel Technology Multi Technology | Prabhu V.,Vel Technology Multi Technology
International Journal of Applied Engineering Research | Year: 2015

Development of mobile phone communication infrastructure in the world has promoted which lead public concern over possible health effect exposure to radio frequency electromagnetic energy (RFEME) emanating from mobile phone antenna. The Micro-strip patch antenna plays an important role in electromagnetic energy transmitting and receiving phenomena in mobile phone. This paper makes an effort to assess the mobile radiation exposure effect on 4 years child, 8 years child and an adult head model. Hand held device model having micro strip antenna is used for human interaction. The software simulation performed by Computer simulation technique(CST) software based on Finite difference Time Domain technique yields specific absorption rate and 3D-thermal distribution on spherical human head. © Research India Publications.

Bala Saravanan C.,Vel Technology Rangarajan Dr Saguunthala R And D Institute Of Science And Technology | Sarasu P.,Vel Technology Multi Technology
International Journal of Soft Computing | Year: 2015

This study highlights that currently a technology has been found for implementation in wireless communication that is to be used at greater distance. But there are various existing technologies in the field of wireless communication to that (Bluetooth, Wi-Fi). And each one of them varies depending on their class of radio frequency. Its application could be used only for a maximum distance of 10-100 m from phone to phone. There is a big problem in increasing the distance to chat through this device (Bluetooth, Wi-Fi) for communication. Therefore, there is an introduced new technology "Sky Tie". This technology has been introduced as a new processing method for each of P2P communication. It increases the communication distance from one end to another end through Industrial, Scientific and Medical (ISM) radio bands 2.45 GHz maximum 5 km. This study will enhance the communication process with this Sky Tie wireless technology. © Medwell Journals, 2015.

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