Gnanasekar A.,RMD Engineering College |
Suresh R.M.,Sri Muthukumaran Institute of Technology
Journal of Theoretical and Applied Information Technology | Year: 2014
Web Service discovery and composition is one of the key objectives of Service Oriented Architecture (SOA) which provides a loosely-coupled environment and enables flexible assembly of existing web services. Service discovery plays a vital role in the overall process of the service discovery and composition. The Web Ontology Language for Services (OWL-S) has emerged as the de facto standard for implementing business process from existing semantic web services. The semantic discovery is a challenging problem and attracts much attention both from industry and academia. This work focuses on the semantic web service discovery using empirical analysis. © 2005 - 2014 JATIT & LLS. All rights reserved.
Paulraj D.,RMD Engineering College |
Swamynathan S.,Anna University |
Madhaiyan M.,TeleData Technology Solutions Ltd
Enterprise Information Systems | Year: 2012
Web Service composition has become indispensable as a single web service cannot satisfy complex functional requirements. Composition of services has received much interest to support business-to-business (B2B) or enterprise application integration. An important component of the service composition is the discovery of relevant services. In Semantic Web Services (SWS), service discovery is generally achieved by using service profile of Ontology Web Languages for Services (OWL-S). The profile of the service is a derived and concise description but not a functional part of the service. The information contained in the service profile is sufficient for atomic service discovery, but it is not sufficient for the discovery of composite semantic web services (CSWS). The purpose of this article is two-fold: first to prove that the process model is a better choice than the service profile for service discovery. Second, to facilitate the composition of inter-organisational CSWS by proposing a new composition method which uses process ontology. The proposed service composition approach uses an algorithm which performs a fine grained match at the level of atomic process rather than at the level of the entire service in a composite semantic web service. Many works carried out in this area have proposed solutions only for the composition of atomic services and this article proposes a solution for the composition of composite semantic web services. © 2012 Copyright Taylor and Francis Group, LLC.
Vigilson Prem M.,RMD Engineering College |
Swamynathan S.,Anna University
WSEAS Transactions on Information Science and Applications | Year: 2011
Addressing health disorders at the early stage during mass casualty is one of the important issues to be thrown light nowadays. If mass casualty occurs in remote locations where proper health care equipments or analysis of medical information is not available, a special team must be appointed to monitor and control it. When an emergency occurs, especially in mass casualty incidents, lots of victims need medical attention. It is obvious that the faster and accurate the acquisition and analysis of data, the more effective the answer could be given. That is, the needs will be attended as early as possible and the affected population could be reduced. The common point in all cases is the analysis of information. Around it lies, the importance of responding to the emergency. Mobile agents play a vital role in communication between different remote locations. If the special team needs information from these locations or the remotely located medical officers needs information from the special team, mobile agents are useful. This paper discusses the use of mobile agent technology as an enabler of open distributed e-Health applications. More precisely, it describes the experiences based on this technology: concerning emergency scenarios.
Kavitha S.,SSN College of Engineering |
Thyagharajan K.K.,RMD Engineering College
Soft Computing | Year: 2016
Image fusion plays a vital role in medical imaging. Image fusion aims to integrate complementary as well as redundant information from multiple modalities into a single fused image without distortion or loss of information. In this research work, discrete wavelet transform (DWT) and undecimated discrete wavelet transform (UDWT)-based fusion techniques using genetic algorithm (GA) for optimal parameter (weight) estimation in the fusion process are implemented and analyzed with multi-modality brain images. The lack of shift variance while performing image fusion using DWT is addressed using UDWT. The proposed fusion model uses an efficient, modified GA in DWT and UDWT for optimal parameter estimation, to improve the image quality and contrast. The complexity of the basic GA (pixel level) has been reduced in the modified GA (feature level), by limiting the search space. It is observed from our experiments that fusion using DWT and UDWT techniques with GA for optimal parameter estimation resulted in a better fused image in the aspects of retaining the information and contrast without error, both in human perception as well as evaluation using objective metrics. The contributions of this research work are (1) reduced time and space complexity in estimating the weight values using GA for fusion (2) system is scalable for input image of any size with similar time complexity, owing to feature level GA implementation and (3) identification of source image that contributes more to the fused image, from the weight values estimated. © 2016 Springer-Verlag Berlin Heidelberg
Thamizharasan S.,Surya Group of Institutions |
Baskaran J.,Adhiparasakthi Engineering College |
Ramkumar S.,RMD Engineering College |
Jeevananthan S.,Pondicherry Engineering College
IET Power Electronics | Year: 2014
A new single-phase H-bridge multilevel inverter (MLI) topology constructed using auxiliary reverse-connected voltage sources along with a hybrid pulse width modulation (PWM) strategy is proposed, to extract a variable frequency variable amplitude output voltage. The principle eschews an astute philosophy to employ PWM approach only for a particular Hbridge that serves to produce the desired level while the remaining add-on modules function with the theory of fundamental switching. It involves the use of reduced number of switching devices for a specific number of output voltage levels in comparison with conventional MLIs. The design of the hybrid PWM suitable to power the appropriate switches add strength to its formulation in the sense it requires only either addition or subtraction to generate the square wave modulated pulses for the power devices in the other units other than that responsible for offering the preferred level of output voltage. The MATLAB R2010b-based simulated performance adequately validated through experimental results foresee the emergence of a new variety of MLIs and forge a different dimension for inverter interfaces in power control applications. © The Institution of Engineering and Technology 2014.