• The KIPS Transactions:PartD
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• v.12D no.6
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• pp.875-880
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• 2005

Recently web services ale being used to provide environments of distributed computing. Web services provide reusable software component. So, one web service can be used by many users, and one user can use different web services. For reliable use of web services, in these cases, it is important to be fault-tolerance. Existing fault-tolerant methods in web services need a kind of client modification and cannot consider extensible factors like quality. This study suggests the system architecture and description language for the system which can improve some of these problems.

• The KIPS Transactions:PartD
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• v.14D no.2
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• pp.241-248
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• 2007

As Web services cover more and more IT area and the number of their implementation cases increase rapidly, most associates have begun to consider the quality of Web services. They require the framework that helps to evaluate and measure the quality of Web services. OASIS WSQM(Web Services Quality Model) technical committee already published Web Services Quality Model specification version 2.0 in 2006. However, it has been described in conceptually. That is, it contains the model view, classification of quality factors, some activities and associates. So, we need Web services quality description language (WSQDL) shaped in XML. To describe WSQDL schema, we need a new paradigm to represent the Web services quality factors consistently and interoperably. For this we provide the new concept of quality chain in this paper.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.12
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• pp.1167-1172
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• 2007

The existing building control and automation systems which have been applied to buildings are provided by many different vendors and each vendor has its own proprietary protocol. There are many problems in system integration since those building control and automation systems belong to each vendor. Also, the problems of cost and space increase, due to the usage of personal computers as the control servers of DDC(Direct Digital Control) in each facility. Those problems mentioned above can be effectively resolved by using XML Web Services and Embedded Web Server. Embedded Web Server and XML Web Services are technologies emerging out of the IT industries and there are many researches to apply them into many fields. In this paper, Embedded Web Server and XML Web Services are proposed to be used in building control and automation system to resolve problems in building system integration.

• Proceedings of the Korea Society for Industrial Systems Conference
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• pp.301-306
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• 2008

The World Wide Web (WWW) has continued to grow at very rapid speed in both the sheer volume of traffic and size and the complexity of Web sites. Web Analytics Industry also has been growing rapidly. Web Analytics is to analyze web log files to discover accessing patterns of web pages. In this paper, we identify factors which can affect the continuous usage intention of a firm using services in web analytics services and empirically validate the relationships between the identified factors. For this purpose, we analyze 174 Korea firms. The analysis results show that the satisfaction is significantly associated with service quality and switching cost and the service usage period is not significantly associated with continuous service usage intention. We measure the service quality using SERVQUAL. It turn out that two dimensions of SERVQUAL, reliability and empathy are significantly associated with satisfaction, but another dimension of SERVQUAL, responsibility, is not. Finally, satisfaction is significantly associated with continuous service usage intention.

• Journal of the Korea Society of Computer and Information
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• v.10 no.1
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• pp.101-112
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• 2005

Recently, one of the most challenging Problems is to compose web services dynamically, that is, on demand. In particular, when a functionality that cannot be directly realized by existing services is required, existing services may be combined together to fulfill the request. This paper is to implement the dynamic composition of web services using existing workflow technologies. Workflow systems play a major role in E-businesses. However, due to the composition of web services using workflows differs from the design of traditional workflow systems, two problems need to be solved. (1) how to efficiently discover web services and (2) how to facilitate the interoperability of heterogeneous web services. In this paper, we present a matching algorithm for web service discovery and propose an approach based on the use of ontologies to facilitate the integration of web services. Finally, we have built a prototype system to illustrate how to the dynamic composition of web services are achieved.

• Proceedings of the Korea Information Processing Society Conference
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• pp.763-764
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• 2012

Web Services are considered to be a promising technology to add a new level of functionality to the existing World Wide Web. However, despite the growing use of Web Services by many organizations, there are several issues that are slowing their deployment such as service discovery, recovery from faults and security. In this paper, we give a detailed overview of issues surrounding Web Services, discuss existing solutions and describe their limitations.

• The Journal of the Korea Contents Association
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• v.5 no.1
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• pp.101-108
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• 2005

In this paper, we propose a design methodology of RESTful SOAP-based web services which try to solve extensibility problem of SOAP-based Web service by adopting REST concept into SOAP. And, we apply the proposed RESTful SOAP-based web services design methodology in constructing slip data processing web services, compare it with simple SOAP-based slip data web services, and try to propose a model for building Web Services in the future. REST is a model about architecture type of web distributed computing , the biggest distributed application in the world. In REST, identification of resources are made by URI, states(resources) are represented by document described by XML and transferred through HTTP our proposed RESTful SOAP-based web services are expected to contribute to constructing useful world wide web services which are essential in building E-Commerce society.

• Proceedings of the IEEK Conference
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• pp.221-222
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• 2006

Today, Web Services is very well-known as a middle-ware that can inter-communicate between many different program languages. This paper test web services by implementing two different web services platforms which are MS .NET based server and Apache AXIS based client. Those platforms have different data structure/process, and they could not give the developer seamless data compatibility through web services. However we confirmed that handling data, by some data transforming rules, web services can successfully inter-communicate between MS .NET based server and Apache AXIS based client.

• Proceedings of the KSRS Conference
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• pp.866-868
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• 2003

In this paper, we developed those Directory Services based on the Web-Service, because Web-Service environments provide a suitable method to gather requested information in an appropriate way. The proposed architecture cooperate with other OpenLS(Open Location Service) Core Services ( Location Utility Service and Router Determin ation service) and is an interoperability one - it ident ifies those global elements of the global Web-Services network that are required in order to ensure interoperability between Web-Services. In this paper, a new architecture of Directory Service with OpenLS Core Services is proposed and tested in OpenLS Core Services environments.

• Journal of Internet Computing and Services
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• v.6 no.2
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• pp.1-11
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• 2005

Web services are being recognized as the efficient way to integrate the distributed applications on the web based on the web standards such as SOAP, WSDL and UDDI. Recently, BPEL4WS is suggested as a standard integration model language for web services to integrate them efficiently. The recent studies of web service integration are focused on the comparability among the services, process identification and tracing, and automation, However, little or no effort has been dedicated to the reusability, extensibility on the business process integrated services and how to allocate the services dynamically, So, in this paper, we propose how to increase the reusability and extensibility of integrated structure when services are integrated using BPEL4WS, and how to allocate and use the services dynamically. Also, we propose the framework of the composition of web services for the efficient use of suggested integrated structure.