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Velmurugan U.,Ranganathan Engineering College | Gopalakrishnan P.,PSG College of Technology
IOP Conference Series: Materials Science and Engineering | Year: 2016

In this paper, an attempt has been made to enhance the fracture toughness (Kc) of boride layer using multi-component (Ni, Cr and B) laser bonding. The fracture toughness of continuously pack borided, interrupted pack borided and multi-component (Ni, Cr and B) laser borided steel specimens was measured using Vickers microindentation fracture toughness test as per ASTM E384 standard. The fracture toughness of continuously pack borided layer was - 3.3 MPa.m1/2. The fracture toughness of interrupted boride layer was in the range of - 4.9 MPa.m1/2. The fracture toughness of multi-component (Ni, Cr and B) laser borided layer was in the range of 13.8 - 18.3 MPa.m1/2. A significant improvement in fracture toughness of laser treated specimens was observed from the experimental results. This may be due to better distribution of boron, nickel, chromium and other alloying elements due to laser treatment and relatively more uniform boride layer as compared with continuously pack borided layer and interrupted pack borided layer. © Published under licence by IOP Publishing Ltd.


Pandiaraj S.,Karunya University | Shankar Kumar K.R.,Ranganathan Engineering College
Journal of Computer Science | Year: 2015

This study presents an experimental evaluation of Discrete Wavelet Transforms for use in speaker identification. The features are tested using speech data provided by the CHAINS corpus. This system consists of two stages: Feature extraction stage and the identification stage. Parameters are extracted and used in a closed-set text-independent speaker identification task. In this study the signals are pre-processed and features are extracted using discrete wavelet transforms. The energy of the wavelet coefficients are used for training the Gaussian Mixture Model. Daubechies wavelets are used and the speech samples are analyzed using 8 levels of decomposition. © 2015 The Shanthini Pandiaraj and K.R. Shankar Kumar.


Alavudeen A.,Kalasalingam University | Rajini N.,Kalasalingam University | Karthikeyan S.,Kalasalingam University | Thiruchitrambalam M.,Ranganathan Engineering College | Venkateshwaren N.,Rajalakshmi Engineering College
Materials and Design | Year: 2015

The present work deals with the effect of weaving patterns and random orientatation on the mechanical properties of banana, kenaf and banana/kenaf fiber-reinforced hybrid polyester composites. Composites were prepared using the hand lay-up method with two different weaving patterns, namely, plain and twill type. Of the two weaving patterns, the plain type showed improved tensile properties compared to the twill type in all the fabricated composites. Furthermore, the maximum increase in mechanical strength was observed in the plain woven hybrid composites rather than in randomly oriented composites. This indicates minimum stress development at the interface of composites due to the distribution of load transfer along the fiber direction. Moreover, alkali (NaOH) and sodium lauryl sulfate (SLS) treatments appear to provide an additional improvement in mechanical strength through enhanced interfacial bonding. Morphological studies of fractured mechanical testing samples were performed by scanning electron microscopy (SEM) to understand the de-bonding of fiber/matrix adhesion. © 2014 Elsevier Ltd.


Vairavel G.,Coimbatore Institute of Technology | Shankar Kumar K.R.,Ranganathan Engineering College
Journal of Theoretical and Applied Information Technology | Year: 2014

This paper investigates the Weighted Linear Parallel Interference Cancellation (WLPIC) Multiuser Detection (MUD) scheme with Vertical-Bell Laboratories Layered Space-Time (V-BLAST) signal detection algorithms in uplink Code Division Multiple Access based Multiple Input Single Output (MISO-CDMA) system. The Bit error rate performance of WLPIC scheme with V-BLAST signal detection and Conventional Linear Parallel Interference Cancellation (CLPIC) scheme with V-BLAST signal detection are compared in both correlated and uncorrelated Rayleigh fading channels. The simulation results show that the uplink MISO-CDMA system performs well with WLPIC MUD scheme and MMSE-SIC signal detection when compared with CLPIC MUD scheme and ZF-SIC signal detection in different channel conditions. © 2005 - 2014 JATIT & LLS. All rights reserved.


Senthil Kumar M.,Ranganathan Engineering College | Sivakumar P.,Ranganathan Educational Institutions REC Kalvi Nagar
International Journal of Applied Engineering Research | Year: 2014

The primary purpose of accreditation is to ensure quality control and qualityassurance, commonly with reference to a certification system in the areas ofeducation, training and testing, whereas the purpose of internal qualityassurance is to develop a quality culture within an institution, and toimplement a strategy for the continuous enhancement of quality. Althoughseveral quality assurance standards and guidelines have been established andimplemented worldwide through various international, regional and nationalagencies; relevant literature searches show that there is no common agreementor criterion that can be used in the quality assurance of engineering education.The main objective of this article is to improve the overall quality ofEducation Accreditation system using Current Communication System (CCS).Changes in the curriculum do support fundamental economic and socialtransformation in the society. Such transformations require new kinds ofskills, capabilities and attitudes, which can be developed by integrating CCSin education. © Research India Publications.


Sathish Kumar B.,Sri Ramakrishna Engineering College | Shankar Kumar K.R.,Ranganathan Engineering College
Journal of Theoretical and Applied Information Technology | Year: 2014

MIMO is combined with OFDM to develop the performance of wireless transmission systems. Multiple antennas are used together at the transmitting and receiving ends. The performance of an OFDM system is calculated, taking into consideration multipath delay spread, channel noise, Rayleigh fading channel and distortion. In this paper, bits are generated and then mapped with modulation schemes like QPSK, PSK and QAM. After that, the mapped data is separated through blocks of 120 modulated data whereas a training sequence of the data is inserted both at the beginning and ending parts of the block. The equalization is used to find out the variation to the rest of data. For a Multiple-Input and Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) system with universal space-time codes and least-squared decoders, this study provides an improved eigenmodes transmission based on to the equivalent channel matrix. Through novel eigenmodes, data symbols encoded by space-time codes can be steered to these eigenmodes analogous to MIMO wireless communication systems with single-carrier transmission. Furthermore, the relations between different code-rate space-time codes, system capacity and number of eigenmodes are measured by numerical simulation. For this, water filling scheme and Adaptive Genetic Algorithm (AGA) is proposed here for bit allocation and determining the optimal transmits powers for orthogonal eigenmodes. Also, for power adaptation two approaches are proposed, primarily the conventional water-filling algorithm and in second technique adaptive Genetic Algorithm is used to choose the optimum power vector. Simulation result shows that the proposed approach provides better results when compared with other existing approaches. © 2005-2014 JATIT & LLS. All rights reserved.


Ranjitham G.,Sri Ramakrishna Engineering College | Kumar K.R.S.,Ranganathan Engineering College
Journal of Theoretical and Applied Information Technology | Year: 2014

This Paper analyses the performance of Multiple Input Multiple Output (MIMO) wireless communication system by combining it with an efficient algorithm Diagonal Reduction (DR). DR is a powerful tool to achieve more efficiently a high performance with less complexity when applied to MIMO detection. This paper proposes a DR algorithm in order to reduce its complexity named Greedy Diagonal Reduction (GDR) algorithm which gives reduced complexity with efficient performance at the receiver using the MATLAB communication tool box version 7.1 as a simulation tool. From the simulation results of various reduction algorithms it is observed that,DR can reduce the number of iterations using size reduction operations. Proposed DR algorithm gives identical Bit Error Rate (BER) performance with LLL algorithms when applied to Successive Interference cancellation (SIC) decoding. Greedy DR reduces the computational complexity in Multiple Input Multiple Output systems by improving the efficiency in terms of size reduction operations. © 2005 - 2014 JATIT & LLS. All rights reserved.


Sengottaian N.,Salem College | Murugesan R.,Ranganathan Engineering College | Velumani A.,Avinashilingam University For Women
International Journal of Applied Engineering Research | Year: 2015

Improper collection and disposal of solid waste that is a heterogeneous mixture of different materials like plastic, paper, metal, glass, earth, stone, soil, kitchen waste, market waste etc. In urban cities like Coimbatore is endanger health of millions of citizens. Agency that manages infrastructural issues Coimbatore Municipal Corporation can overcome issues related to solid waste by identifying landfill gas potential and emission at landfill site. In Our study we propose practical solution to this problem by biochemical process. The proposed system of the waste management needs and integrated approach with active participation from peoples as well as the local solid waste management department and Municipal Corporation. The value of gas potential provides information that total MSW disposed in the land fill is decomposed but only 60 -70% of MSW disposed so proper solid waste management needed for Coimbatore reason. © Research India Publications.


Sathish Kumar B.,Sri Ramakrishna Engineering College | Shankar Kumar K.R.,Ranganathan Engineering College
Research Journal of Applied Sciences, Engineering and Technology | Year: 2015

Rapid development of wireless services, leads to ubiquitous personal connectivity in the world. The demand for multimedia interactivity is higher in the world which leads to the requirement of high data transmission rate. Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is a future wireless service which is used to overcome the existing service problems such as development of subscriber pool and higher throughput per user. Although it overcomes the problems in existing services, resource allocation becomes one of the major issues in the MIMO-OFDM systems. Resource allocation in MIMO-OFDM is the optimization of subcarrier and power allocation for the user. The overall performance of the system can be improved only with the efficient resource allocation approach. The user data rate is increased by efficient allocation of the subcarrier and power allocation for each user at the base station, which is subject to constraints on total power and bit error rate. In this study, the problem of resource allocation in MIMO-OFDM system is tackled using hybrid artificial bee colony optimization algorithm based on a crossover operation along with Poisson-Jensen in equation. The experimental results show that the proposed methodology is better than the existing techniques. © Maxwell Scientific Organization, 2015.


Joseph Prabhakar Williams H.,Anna University | Shankar Kumar K.R.,Ranganathan Engineering College
Research Journal of Applied Sciences, Engineering and Technology | Year: 2014

This study presents an architectural approach to the design of Low Area and high speed linear phase Finite Impulse Response (FIR) digital filter. FIR digital filters are used in DSP by the virtue of its, linear phase, fewer finite precision error, stability and efficient implementation. In the proposed architecture, we are introduced five parallel linear phase fir filter to obtain the high speed and low Area than four parallel fir filters. So the proposed architectures offer Low Area and high speed compared to the best existing linear phase FIR filter implementations in the literature and the proposed architectures have been implemented and tested on Spartan-3 xc3s200-5pq208 Field-Programmable Gate Array (FPGA) and synthesized. © Maxwell Scientific Organization, 2014.

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