Welcome to Journal of Theoretical and Applied Information Technology

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This paper, presents an intelligent diagnosis system using hybrid approach of adaptive neuro-fuzzy inference system (ANFIS) model for classification of Electrocardiogram (ECG) signals. Feature extraction using Independent Component Analysis (ICA) and Power spectrum, together with the RR interval then serve as input feature vector, this feature were used as input of ANFIS classifiers. six types of ECG signals they are normal sinus rhythm (NSR), premature ventricular contraction (PVC), atrial premature contraction (APC), Ventricular Tachycardia(VT), Ventricular Fibrillation (VF) and Supraventricular Tachycardia (SVT). The proposed ANFIS model combined the neural network adaptive capabilities and the fuzzy inference system. The results indicate a high level of efficient of tools used with an accuracy level of more than 97%.

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In some of the object-oriented programming languages such as Java, a regular class could contain one or more nested classes. These nested classes are called inner classes which are supposed to carry out more specific tasks for their outer class. However, extensive use of inner classes would result in increasing program complexity and costly maintenance. We propose a complexity metric to measure the complexity extent of inner classes. Our metric is able to measure the complexity of inner classes in term of breadth and depth.

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The paper proposes an adaptive decision station to create real estate portfolios. The decision station would be useful for investors interested in real estate investment and for environments where data needs to be constantly updated by using the internet. The Findlay model was selected for the portfolio management engine of the decision station gives its simplicity and previous results.
A prototype was built based on the proposed model and tested by using real estate data collected from 63 cities from different metropolitan areas in the United States for each quarter from 1999 to 2005. The results showed that the station was able to determine which properties should be selected from a set of input choices in order to minimize risk and maximize return of investment.

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Lightning has been one of the important problems for insulation design of power systems and it is still the main cause of outages of transmission and distribution lines. The lightning return-stroke current and the charge delivered by the stroke are the most important parameters to assess the severity of lightning strokes to power lines and apparatus. In order to calculate lightning surge analysis in power systems, appropriate models and parameters describing the components of systems should be required. It is also necessary to clarify how much those models would influence results of simulation. In other words, it is important to confirm how much probability of back flashover accidents would occur in changing grounding model or its input parameters. In this paper we compare some models for components in transmission tower and will show the influence to the back flashover results, especially focusing on grounding impedance model.

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This work takes a study on the Web Services—a technology that has come to change the future of Computing and e-commerce. Web Services is a distributed computing technology that offers interaction and collaboration among vendors and customers, with the vision of providing ubiquitous computing.
When you plug an appliance into the electricity socket, you don't worry about how the electricity generation and distribution takes place. All that is expected is uninterrupted power and the utility bill that you get at the end of the month! Similarly, Web Services will make computing resources, both hardware and software, accessible through the Internet just like electricity is made available. Web Services will do for computing what the Internet did for data. They would encourage a pay-per-usage model and make dynamic collaborations possible. One of the key definitions of Web Services is: "Web Services are loosely coupled software components delivered over Internet-standard technologies.”
This paper considers the importance of web service as well as the success and the advantages of web service over the early technologies like: EDI, CORBA, and COM. Distinction is made between Web Service and Service. The components technologies of Web Service such as the WSDL, XML, UDDI, and, SOAP and how they apply to e-health applications, were examined. The creation of Web Service using the ASP.NET, Apache axis and Java2 Platform among other issues were also considered. We present a model for web services enabled infrastructure which is a framework for our e-health project at our research centre. In effect this paper will create a good knowledge for those new to web services as well as make more enlightenment to those already acquainted with the technology especially those developing applications for e-health services.

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The security in the multicast communication in the large groups is the major obstacles for effectively controlling access to the transmitting data. The IP Multicast itself does not provide any specific mechanisms to control the intruders in the group communication. Group key management is mainly addresses upon the trust model developed by Group Key Management Protocol (GKMP). There are several group key management protocols that are proposed, this paper will however elaborate mainly on Group key management which has a sound scalability when compared with other central key management systems. This paper emphases protocol which provides a scope for the dynamic group operations like join the group, leave the group, merge without the need of central mechanisms. An important component for protecting group secrecy is re-keying. With the combination of strong public and private key algorithms this would become a better serve to the multicast security.

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Service Oriented Architecture (SOA) is a paradigm for developing distributed and heterogeneous software applications within and across organizational boundaries. Choreography is a coordination model of SOA in which service collaborations to achieve a common goal are described from global point of view. One of the most important issues in SOA is identifying required services and their interfaces. Service interfaces are necessary for searching required organization services or developing them from scratch. Because of involving key information of service interfaces in choreography, it can be used in generation of service interfaces. This paper presents an algorithm for automatic interface generation of service interfaces from several choreographies using ontology. Ontology assists to conceptualize a specific domain of knowledge. This method helps developers to facilitate, automate and speedup a part of development process of SOA-based software systems.

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This paper provides logic to overcome the standard SS7 load-sharing algorithms for SCCP messages. Logic provides flexibility to support load-sharing non- 2n links within a link-set. Logic also takes into consideration typical service providers’ SS7 signaling network with network elements supporting different or mix of SS7 link types such as 64kbps low-speed link and 2mbps high-speed links.