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Parasuraman K.,Sri Muthukumaran Institute of Technology | Milton Boaz B.,Presidency College at Chennai
International Journal of ChemTech Research | Year: 2015

The bulk single crystal of L- threonine cadmium chloride (LTCC), an efficient semiorganic Non Linear Optical (NLO) material of size 60 mm in length, 15 mm in diameter, was grown successfully in unidirectional by Sankaranarayanan Ramasamy (SR) method. Single crystal X-ray diffraction study reveals that LTCC crystallizes into orthorhombic system with the space group P212121. The unidirectional growth along the plane (2 0 2) was confirmed from the powder XRD pattern with the sharp peak having maximum intensity. Optical transmission spectrum shows that LTCC has highly transparent in the entire visible region with a wide band gap of 3.75 eV for large photon absorption. The Vicker’s microhardness test is used for the assessment of fracture toughness, brittleness index and yield strength for the synthesized crystal. Dielectric constant and dielectric loss were calculated by varying frequencies at different temperatures. Photoluminescence study establishes that LTCC exhibit red emission in the wavelength region 615 nm. The laser induced surface damage threshold for the grown crystal was measured as 3.12 GW/cm2 and SHG efficiency of the crystal is also examined by Kurtz’s powder test using Nd: YAG Laser. © 2015, Sphinx Knowledge House. All rights reserved. Source

Chellatamilan T.,Arunai Engineering College | Suresh R.M.,Sri Muthukumaran Institute of Technology
Life Science Journal | Year: 2013

With the advent of internet technology as a ubiquitous platform for sharing the educational contents and experiences, many of the institutions across the globe offer the federated search to the courses, lesson plans, contents, assignments, seminars and experiments. These learning resources are stored in the repositories of the learning content management system. Sophisticated search and information retrieval solutions are essential for efficient use of these repositories. The structure of many existing information retrieval system considers ontology for retrieval. This ontology based solution increases the accuracy of information retrieval through high precision and recall. This paper addresses the requirement for pre-processing and classification of documents in order to achieve more efficient Information Retrieval system. Tools and techniques employed for autonomous classification or clustering of documents are investigated and a new method based on concept expansion is proposed. The proposed methods are evaluated using Reuters 21578 dataset. Source

Anitha V.,Sri Muthukumaran Institute of Technology | Murugavalli S.,Panimalar Engineering College
IET Computer Vision | Year: 2016

A brain tumour is a mass of tissue that is structured by a gradual addition of anomalous cells and it is important to classify brain tumours from the magnetic resonance imaging (MRI) for treatment. Human investigation is the routine technique for brain MRI tumour detection and tumours classification. Interpretation of images is based on organised and explicit classification of brain MRI and also various techniques have been proposed. Information identified with anatomical structures and potential abnormal tissues which are noteworthy to treat are given by brain tumour segmentation on MRI, the proposed system uses the adaptive pillar K-means algorithm for successful segmentation and the classification methodology is done by the two-tier classification approach. In the proposed system, at first the self-organising map neural network trains the features extracted from the discrete wavelet transform blend wavelets and the resultant filter factors are consequently trained by the K-nearest neighbour and the testing process is also accomplished in two stages. The proposed two-tier classification system classifies the brain tumours in double training process which gives preferable performance over the traditional classification method. The proposed system has been validated with the support of real data sets and the experimental results showed enhanced performance. © The Institution of Engineering and Technology. Source

Joice C.S.,Sri Muthukumaran Institute of Technology | Paranjothi S.R.,Rajalakshmi Engineering College | Kumar J.S.,Anna University
2011 International Conference on Recent Advancements in Electrical, Electronics and Control Engineering, IConRAEeCE'11 - Proceedings | Year: 2011

This paper presents the practical implementation of the control of three phase Brushless DC (BLDC) motor in all the four quadrants. The controller dsPIC30F4011 is used. The four quadrant operation which was simulated using MATLAB / Simulink is implemented and analyzed [1]. A smooth transition between the quadrants is achieved. The time taken to change the direction of rotation of BLDC motor is also comparatively reduced. The frequent change of direction of rotation and hence the change of quadrants results in frequent braking. During braking time the kinetic energy is wasted as heat energy. This paper presents a concept wherein the kinetic energy is converted and stored in a battery. The battery thus charged can be used to run the same BLDC motor with no interruption in power supply. © 2011 IEEE. Source

Shanthi D.,Sri Muthukumaran Institute of Technology | Amutha R.,SSN College of Engineering
2011 International Conference on Emerging Trends in Electrical and Computer Technology, ICETECT 2011 | Year: 2011

Soc is a technology that integrates heterogeneous system components such as microprocessors, memory logic and DSP's into a single chip. The overall performance of SoC design depends on efficient on-chip communication architectures. Efficient interconnection architecture is necessary interprocessor communication, communication between processors and peripherals and between processor and memory. The communication architecture should be flexible in such a way that it should adapt to various traffic conditions. Currently on-chip interconnection networks are mostly implemented using shared buses which are the most common medium. The arbitration plays a crucial role in determining performance of bus-based system, as it assigns priorities, with which processor is granted the access to the shared communication resources. In the conventional arbitration algorithms there are some drawbacks such as bus starvation problem and low system performance. Hence in this paper, probability based dynamically configurable Round robin arbiters are proposed to handle the discrepancy of existing arbitration algorithms. This bus provides each component a flexible and utmost share of on-chip communication bandwidth and improves the latency in access of the shared bus. The performance of SoC is improved using this probabilistic round robin algorithm with regard to the parameters, latency compared to conventional bus arbitration algorithms. © 2011 IEEE. Source

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