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Frequency: 12 issues per year
ISSN: 2250–3005 (online version)
Published by: IJCER
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International Journal of Computational Engineering Research

(IJCER)

 

Articles

 

Research Article  open access
Constraint Aware Dynamic Web Service Composition for A Specific Business Requirement
Raghu Rajalingam, Shanthi
India
Paper Indexed : :03.3005/0510105
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

In today's fast moving technology world everyone wants a better and quality of IT services they consume. Here the IT services are referred to web services. In recent time development IT solutions is reduced and most of the time spent on integrating the existing IT solutions. In this space web services has dominating the software industry. Every one focusing converting the existing solution to some form web services and offering the services to customer. The existing technology of web services are extended to completely customize the way services are composed as per the customer requirement so that it will add or provide value as well as the maximum benefit to the customer. Dynamically composing the web services based on the user constraint and providing services to customer always challenging. The proposed paper focus on to addressing how to compose web services based on the user constraint dynamically. The proposal is win-win for both service provider as well as the service consumer.

Keywords:Service oriented computing; composition of services; dynamic composition; UDDI registry; web services.

 

Research Article  open access
C0 Mixed Layerwise Quadrilateral Plate Element with Variable in and Out-Of-Plane Kinematics and Fixed D.O.F.
Icardi U., Sola F.
Italy
Paper Indexed : : 03.3005/05106025
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

A quadrilateral, eight-node, mixed plate element based upon a recent 3D, variable kinematics zig-zag plate model by the authors is developed. Representation can be refined across the thickness though the number of unknown does not depend on the number of constituent layers, the nodal variables being fixed. The out-of-plane stress continuity is a priori satisfied at the interfaces and the material properties are allowed to step-vary moving over the plane of the structure. In order to obtain a C0 model, all derivatives of unknowns are converted with a technique that does not introduce additional d.o.f. Equilibrium equations are satisfied just in approximate integral form, mid-plane displacements and interlaminar stresses, the nodal d.o.f., being interpolated using the same standard serendipity shape functions. As shown by numerical results, this does not result in any precision loss. Accuracy, solvability and convergence are assessed considering multi-layered monolithic and sandwich-like structures with different boundary conditions and abruptly changing material properties across the thickness, for which exact solutions are available. Also a bonded joint is studied, which is treated as a laminate with spatially variable properties. In all these cases, the element is shown to be fast convergent and free from spurious, oscillating results.

Keywords:partial hybrid formulation; intra-element equilibrium in an approximate integral form; fixed d.o.f.; hierarchic representation; C0 plate element;

Research Article  open access
Random Key Pre-distribution Schemes using Multi-Path in Wireless Sensor Networks
Si-Gwan Kim
Korea
Paper Indexed : :03.3005/051026032
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

Low-cost, small-size and low-power sensors that incorporate sensing, signal processing and wireless communication capabilities is becoming popular for the wireless sensor networks. Due to the limited resources and energy constraints, complex security algorithms applied to ad-hoc networks cannot be employed in sensor networks. In this paper, we propose a node-disjoint multi-path hexagon-based routing algorithm with a key pre-distribution scheme in wireless sensor networks. We describe the details of the algorithm and compare it with other works. Simulation results show that the proposed scheme achieves better performance in terms of security, efficiency and message delivery ratio.

Keywords:key pre-distribution, multi-path, routing, security, wireless sensor networks

Research Article  open access
Development of Seakeeping Test and Data Processing System
Fei Yu-Ting, HouGuo-Xiang, Wang Kai, Zhang Yao
China
Paper Indexed : : 03.3005/051033038
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

A seakeeping test and data processing system is developed for towing tanks. This system includes two main procedures: wave-generating and data processing. In the wave-generating procedure, the linear filtering method is used to generate irregular waveswith the full consideration of the actual efficiency of the machine and the compensation for the actual stroke of piston. Furthermore, groups of piston motion data meeting the requirements of target spectrum are afforded. To ensure the normal operation of a wave machine, the above data within the range of the rated strokes of piston should be chosen. In the data processing procedure, the correlation function method is used to handle the time domain signals which contain irregular waves, ship swaying motion, hull stress and so on. Then the spectrum curve of these test data can be drawn and some statistical values can be obtained based on the narrow-band spectrum theory. According to these statistical values, the frequency response function can be derived, and the predicted value of ship motion in irregular waves can be calculated. By comparing the predicted and experimental results, the reliability of this system can be evaluated. On the basis of the movement of a boat in irregular waves and a series of dynamic responding experiments, this paper proves that thedeveloped system has many advantages, such as succinctness, completeness, accurate data process, reliability, accurate simulation from actual spectrum to target spectrum and so on.

Keywords:Wave generator; irregular wave; seakeeping test; software

Research Article  open access
Emotion Recognition based on audio signal using GFCC Extraction and BPNN Classification
Shaveta Sharma, Parminder Singh
India
Paper Indexed : :03.3005/051039042
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

For automatic speech recognition (ASR) there is a big challenge which deals with momentous presentation reduction in high noisy environments. This paper presents our emotion classification based on Gammatone frequency cepstrum coefficient used for feature extraction along with Back propagation neural network and the experimental results on English speech data. Eventually, we obtained significant presentation gains with the new feature in various noise conditions when compared with traditional approaches. In our proposed work we considered two emotions SAD and HAPPY which are used to show the implementation results. The simulation environment taken to implement the whole process is in MATLAB

Keywords:Back propagation neural network, GFCC, audio signals, filter banks

Research Article  open access
Analysis of Circular Patch Antenna Embeded on Silicon Substrate
Shaikh Haque Mobassir Imtiyaz, Sanjeev kumar Srivastava
India
Paper Indexed : : 03.3005/051043050
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

This paper presents the effect of changing the substrate thickness and path diameter on a circularly polarized linearly feed micro-strip antenna. The base is fabricated with silicon substrate having di-electric permittivity value as 9. The antenna we have simulated is having the centre frequency of 1.227ghz which makes it suitable even for gps satellite communication. The parameters we will be dealing here mainly are total gain, substrate thickness and patch diameter and its subsequent effect on radiation pattern.

Keywords:Antenna, silicon, gain, patch, diameter, substrate, thickness

Research Article  open access
Performance Analysis of Bus Topology in Fiber Optic Communication
Lakshmi A Nair, Lakshmy G B
India
Paper Indexed : : 03.3005/051051055
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

Topology refers to the layout of connected devices in a network. It describes the way in which the elements of the network are mapped. Optical network topologies such as bus, star and tree reduce complexity by using minimum number of couplers, multiplexers, demultiplexers and optical amplifiers and can reduce cost in large network. The performance of bus topology is investigated and identified that, for bus topology the quality of signal goes on decreasing with increase in number of nodes. The performance of bus topology is investigated in presence of optical amplifiers such as Semiconductor Optical Amplifiers (SOA) and Erbium Doped Fiber Amplifier (EDFA) and photodiodes such as PIN and Avalanche photodiode (APD). By considering the signal quality factor and bit error rate it is investigated that bus topology using EDFA with PIN photodiode serves better.

Keywords:Avalanche photodiode (APD), data rate, Erbium Doped Fiber Amplifier (EDFA), LAN (Local area Network), Q factor, Semiconductor Optical Amplifiers (SOA), Topology

Research Article  open access
Special Double Sampling Plan for truncated life tests based on the Marshall-Olkin extended exponential distribution
D.Malathi || Dr.S.Muthulakshmi
India
Paper Indexed : :03.3005/051056062
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

In this study , we propose the designing of special double sampling plan for truncated life tests using percentiles under the assumption that the life time of the product follows Marshall-Olkin extended exponential distribution . The minimum sample sizes for the first and second samples are determined for the specified consumer's confidence level with minimum average sample number. The operating characteristics are analysed and the minimum percentile ratios of life time are obtained so as to meet the specified producer's risk. The efficiency of special double sampling plan is analysed with zero-one double sampling.

Keywords:Special double sampling, Consumer's risk, Operating Characteristic function, Producer's risk, Truncated life tests, Average sample number.

Research Article  open access
Data Integration in Multi-sources Information Systems
Adham mohsin saeed
Bagdad
Paper Indexed : : 03.3005/051063069
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

Data integration involves combining data coming from different sources and providing users with a unified view of these data. In this paper, we introduced the problem of integration of multi-source information systems with some focus on the heterogeneity and conflict issues at different levels .We have made some survey related the current implementations methods that have been used to solve the problems of data integration of multi sources IS which can be classified on three will established approaches, we have also discussed some of the limitations and advantages of such approaches, next we talked about the current trends in data integration such as warehousing, descriptive logic and ontology . Finally, we have presented some case studies that have been implemented using some of these approaches.

Keywords:Data integration, multi-source information systems, warehousing

Research Article  open access
Aluminum Foaming For Lighter Structure
Prof. Sunil M Mahajan, Ganesh A Jadhav
Nashik
Paper Indexed : : 03.3005/051070074
International Journal of Computational Engineering Resaerch , Volume 05 ~ Issue 01 (January 2015)

Abstract

Aluminum foaming for light weight construction has become an attractive research field both from the scientific viewpoint and the prospect of industrial applications. Various methods for making such foams are available. Some techniques start from specially prepared molten metals with adjusted viscosities. Such melts can be foamed by injecting gases or by adding gas-releasing blowing agents which decompose in-situ, causing the formation of bubbles. A further way is to start from solid precursors containing a blowing agent. Alternatively, casting routes can be used to make such precursors. The properties of aluminum foams promise a variety of applications in vehicle design ranging from light-weight construction, impact energy absorption to various types of acoustic damping and thermal insulation. Aluminum Foaming is not implemented in India. In these seminar a over view of various term like concept, process, properties, advantages, disadvantages and practical applications of it are explained.

Keywords:Aluminum foam; cellular structure; production; lightweight; incombustible; sound absorption; energy absorption.