Coimbatore, India

Karpagam College of Engineering is an Autonomous institution Affiliated to Anna University,Chennai and Approved by AICTE. It was established in the year 2000 Wikipedia.

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Shanmughasundaram P.,Karpagam College of Engineering | Subramanian R.,PSG College of Technology
Advances in Materials Science and Engineering | Year: 2013

Dry sliding wear behaviour of eutectic Al-Si alloy-graphite composites was investigated employing a pin-on-disc wear test rig. Results revealed that the wear and friction coefficients decreased linearly with increasing weight percentage of graphite particles. Wear resistance of the composite increased considerably with increasing sliding velocity at constant load. In contrast, the friction coefficient of Al-7.5 wt.% Gr composite increased when the sliding velocity was increased from 1 m/s to 2 m/s at 49 N. Worn-out surfaces of wear specimens after the test were examined by scanning electron microscopy to study the morphology of worn surfaces. EDS analysis was carried out to investigate the influence of mechanically mixed layer (MML) which comprises oxides and iron, and this acted as an effective tribolayer in enhancing the wear resistance at higher sliding velocity. © 2013 P. Shanmughasundaram and R. Subramanian.

Shanmughasundaram P.,Karpagam College of Engineering | Subramanian R.,PSG College of Technology
Journal of Mechanical Science and Technology | Year: 2013

This paper presents an experimental investigation on the surface roughness of pure commercial Al, Al-15 wt% fly ash, and Al-15 wt% fly ash/1.5 wt% graphite (Gr) composites produced by modified two-step stir casting. The effect of reinforcements and machining parameters such as cutting speed, feed rate, and depth of cut on surface roughness, which greatly influence the performance of the machined product, were analyzed during turning operation. The optimum machining parameters were found in minimizing the surface roughness of the materials by using the Taguchi and ANOVA approach. Results show that the presence of the fly ash particles reduces the surface roughness of composites compared with pure Al. The inclusion of 1.5 wt% Gr in the Al-fly ash composite reduces the surface roughness considerably. A scanning electron microscopy investigation was carried out on the machined surfaces of the tested materials. Confirmation tests were performed to validate the regression models. © 2013 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.

Shanmughasundaram P.,Karpagam College of Engineering | Subramanian R.,PSG College of Technology | Prabhu G.,Karpagam University
Advanced Materials Research | Year: 2012

In the stir casting process, homogeneous dispersion of reinforcing particles within the matrix material is one such major problem, which influences on the properties of composites. In this research, an attempt has been made to study the influence of fly ash wt.% (10,15 and 20), ratio of the impeller outer dia to crucible inner dia (0.7,0.5 and 0.3) and processing method (liquid state stirring, two step stirring and modified two step stirring) on the mechanical properties and the distribution of fly ash particles in the Al matrix.Optimum parameters were identified for attaining the maximum mechanical properties such as hardness and tensile strength of composites by the application of Taguchi method, Analysis of Variance (ANOVA) and the results were validated by confirmation test.The present work could provide a guide for the industrial preparation of composites. © (2012) Trans Tech Publications.

This study examines the chemical composition and in vitro anticancer activity of the essential oil from Ocimum basilicum Linn. (Lamiaceae), cultivated in the Western Ghats of South India. The chemical compositions of basil fresh leaves were identified by GC-MS: 11 components were identified. The major constituents were found to be methyl cinnamate (70.1%), linalool (17.5%), β-elemene (2.6%) and camphor (1.52%). The results revealed that this plant may belong to the methyl cinnamate and linalool chemotype. A methyl thiazol tetrazolium assay was used for in vitro cytotoxicity screening against the human cervical cancer cell line (HeLa), human laryngeal epithelial carcinoma cell line (HEp-2) and NIH 3T3 mouse embryonic fibroblasts. The IC50 values obtained were 90.5 and 96.3 μgmL -1, respectively, and the results revealed that basil oil has potent cytotoxicity. © 2012 Taylor & Francis.

Kannappan A.,Karpagam College of Engineering | Tamilarasi A.,Kongu Engineering College | Papageorgiou E.I.,Technological Educational Institute of Lamia
Expert Systems with Applications | Year: 2011

The soft computing technique of fuzzy cognitive maps (FCM) for modeling and predicting autistic spectrum disorder has been proposed. The FCM models the behavior of a complex system and is used to develop new knowledge based system applications. FCM combines the robust properties of fuzzy logic and neural networks. To overwhelm the limitations and to improve the efficiency of FCM, a good learning method of unsupervised training could be applied. A decision system based on human knowledge and experience with a FCM trained using unsupervised non-linear hebbian learning algorithm is proposed here. Through this work the hebbian algorithm on non-linear units is used for training FCMs for the autistic disorder prediction problem. The investigated approach serves as a guide in determining the prognosis and in planning the appropriate therapies to special children. © 2010 Elsevier Ltd. All rights reserved.

Joe C.V.,Karpagam College of Engineering
2014 International Conference on Science Engineering and Management Research, ICSEMR 2014 | Year: 2014

Finding the user's emotion it can be used for business development and psychological analysis. The motivation of this paper is to build the Tamil emotional corpus for being base for the emotional analysis based on the acoustic variations present and to make Tamil emotional corpus available in public domain. Tamil Play will be used as main resource for building the emotional corpus. Basically, emotions like Happy, Neural, Sad, Fear and Anger are taken for this analysis purpose. And also for the accuracy purpose from the play both Male and Female Speakers emotional speech have been considered. The observer's perception test result will be used to evaluate annotation of emotion. Tamil emotional speech corpus have been built and Emotion Recognition engine has been constructed using Support Vector Machine (SVM) classifier with the features like MFCC and Energy. © 2014 IEEE.

Rajaram A.,Karpagam College of Engineering | Gopinath S.,Anna University
Journal of Theoretical and Applied Information Technology | Year: 2014

Mobile Ad hoc Network is the indivisible part of wireless network. In the past few years, the popularity of MANET grows unlimitedly. Due to the presence of mobility and infrastructure less topology, the vulnerability of ad hoc networks is introduced unconditionally. So the failures of link, path and node may occur which leads to lack of communication between the users. Sometimes the malicious attackers arise to make more damage to network connectivity and produce false information among the mobile nodes. To overcome this issue, several approaches are developed to make more efficient routing. But they have not focused on failures of node, link and path as well as malicious activities at a time. We proposed Optimized Multicast Routing Scheme (OMRS) to attain balance between the above said issues. In first phase of this scheme, we develop the detection and avoidance of malicious attacks is implemented with the predetermined trust value of node characteristics. We have also introduced the characteristics of malicious attacks in linear network systems. In second phase, stability ratio of link, path and node is determined to maintain threshold value which ensures the resilience to the path failures. By implementing these solutions, we have achieved better stability and node connectivity towards the ultimate goal of multicast routing scheme. We implement our proposed scheme within Network Simulator (NS2.34) tool environment. By using the extensive simulation results, the proposed scheme achieves better delivery ratio, detection ratio, probability of failure occurrence and less communication overhead, end to end delay than the ODMRP, BDP. © 2005 - 2014 JATIT & LLS. All rights reserved.

Sathesh K.,Karpagam College of Engineering
Microsystem Technologies | Year: 2011

Components like passive electronically scanned (sub) arrays, T/R modules, reconfigurable antennas etc., in RF applications are in need of MEMS switches for its re-configurability and polarization. This paper presents the analysis, design and simulation of a MEMS switch. The switch proposed in this paper is intended to work in the frequency range of 4-8 GHz. The proposed switch fulfills the switching characteristics concerning the five requirements loss, linearity, high switching speed, small size/power consumption, low pull down voltage following a relatively simple design, which ensures reliability, robustness and high fabrication yield. The switch implemented in this paper is based on the integration mode of operation and widely used in RF applications. © 2010 Springer-Verlag.

Velmyl P.,Karpagam College of Engineering
Proceedings of International Conference on Electronics Communication and Computing Technologies 2011, ICECCT'11 | Year: 2011

Cloud computing is the emerging computing technology platform which resolves for a single platform for diversive applications. The paper takes up the issues of security, migration of applications from an internal data centre into cloud, scalability, billing and security. The paper thus points out the hardware incongruence for the cloud computing and presents key concepts for fabrication of VLSI chips. For example, the bills for cloud storage access is based on I/0 count. This metric is inaccurate since the cost of handling the bits varies from disk to disk. This arises due to variance of random access and sequential access used in disk. In sequential access, data is written to or read from one portion of the disk in a continual stream of bits. In random access, the disk head must jump around to different parts of the disk to read or write data. This disparity is immense since, sequential access can achieve a throughput on an average disk of up to 63.5MB/s (megabits per second), whereas random access can only be executed at 1.5MB/s. Techniques for reducing the random access and unnecessary metadata lookups are analyzed. The external threats for cloud from hardware hacking is attended and key alternatives are suggested for networking environment. © 2011 IEEE.

Vignesh R.V.,Karpagam College of Engineering
7th International Conference on Intelligent Systems and Control, ISCO 2013 | Year: 2013

During the developmental period of photo copiers, toner is used to make a copy of the document on the paper. The toner was simply a carbon powder, for the past two decades. Then, to improve the quality of the photocopy, carbon was melt-mixed with a polymer. Photo copiers use fuser oil (primarily, Di-methyoxy siloxane), which melts the toner particles and then bind on the paper. This gives a glossy effect and the best quality in fusion of toner particles. But it reduces the life span of drum roller, heat roller unit etc. To mitigate these problems and not compromising the glossy effect in the photocopy, nano phased Chromium Oxide may be mixed with the toner. © 2013 IEEE.

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