• Journal of Korea Multimedia Society
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• v.15 no.4
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• pp.540-551
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• 2012

Recently, the W3C has developed the HTML5 standard which gives the basis for providing various web applications on the web environments. Because of the advent of the smart devices and the broadband wireless network, users can accesse the web applications on the smart devices at anytime and anywhere. In addition, the demand on the multiscreen services, which enables users to use the appropriate device to their situation, has increased, since users have various smart devices. In this paper, we propose the grouping mechanism of web objects on the HTML5 based web platform, the extraction mechanism of the web object information which is used to create the web object on other devices, and the web object creation mechanism based on the received web object information. In addition, we propose the web service migration architecture between devices on the open web platform and implement the grouping, extraction and creation mechanism of the web objects on the test web document and generic web document with Chrome extension. Finally, we implement the delivery mechanism of the web object information between devices using the node.js and the WebSocket technologies.

• The KIPS Transactions:PartD
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• v.12D no.4 s.100
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• pp.627-636
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• 2005

The Intelligent Web Service is proposed for the purpose of automatic discovery, invocation, composition, inter-operation, execution monitoring and recovery web service through the Semantic Web and the Agent technology. To accomplish this Intelligent Web Service, the Ontology is a necessity for reasoning and processing the knowledge by the computer. However, creating service ontology, for the intelligent web service, has two problems not only consuming a lot of time and cost depended on heuristic of service developer, but also being hard to be mapping completely between service and service ontology. Moreover, the markup language to describe the service ontology is currently hard to be learned by the service developer In a short time. This paper proposes the efficient way of designing and creating the service ontology using MDA methodology. This proposed solution reuses the creating model in terms of desiEninE and constructing Web Service Model using UML based on MDA. After converting the Platform-Independent Web Service Model to the dependent model of OWL-S which is a Service Ontology description language, it converts to OWL-S Service Ontology using XMI. This proposed solution has profits, oneis able to be easily constructed the Service Ontology by Service Developers, the other is enable to be created the both service and Service Ontology from one model. Moreover, it can be effective to reduce the time and cost as creating Service Ontology automatically from a model, and calmly dealt with a change of outer environment like as the platform change. This paper cites an instance for the validity of designing Web Service model and creating the Service Ontology, and validates whether the created Service Ontology is valid or not.

• Journal of Korean Library and Information Science Society
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• v.48 no.2
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• pp.345-372
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• 2017

With development of web, web-archival information services using research records are diversified because values of the records increase in terms of preservation, use and share. Thus, it is necessary to understand and discuss current situation and improvement in future of web-archival information service. This study develops evaluation measures for web-archival information service based on DigiQUAL and NDSLQual, reflecting characteristics of research records. To confirm the validity of the proposed measures, questionnaires were built based on the indicators and distributed to real users of NTIS, which is a case of web-archival information services using research records. Finally, this study analyzes problems of web-archival information services using research records and recommend improvement methods.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.54_55
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• 2009

기존 전력용 자동화시스템들은 중앙 집중적으로 관리되었기 때문에 공통된 표준 프로토콜을 정의하고 자동화시스템들이 이를 따르는 형태를 취함으로써 상호 정보교환이 가능하도록 하였다. 최근 전력산업의 규제 완화와 시장경제의 도입으로 인해 중앙 집중적 계통운영 방식은 미래에 대한 확장성 및 유연성이 부족하다는 한계에 직면해있다. 이 같은 문제점을 해결하기 위하여 본 논문에서는 최근 IT분야에서 활발히 연구되고 있는 웹 서비스 기술을 이용한다. 웹 서비스는 인터넷 상에서 XML표준을 기반으로 개발된 메시지와 HTTP를 이용함으로써 운영체제나 구현기술에 구애 받지 않고 다양한 클라이언트에게 어떤 기능을 제공하는 것이 가능하도록 한다. 본 논문에서 제안하는 웹 서비스 기반의 새로운 전력정보 통합구조는 다양한 자동화 시스템이 연계된 복잡한 전력계통을 느슨하게 연결함으로써 변화와 확장에 대해 민첩하고 유연하게 대처 할 수 있는 방법을 제시한다. 본 논문에서 제시하는 방법의 유용성을 검증하기 위하여 웹 서비스 기반 SCADA 데모시스템을 구축하여 시뮬레이션을 수행하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.1169-1172
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• 2004

웹서비스의 보안정책은 전송계층과 어플리케이션 계층 두 부분에 적용되고 있으며, 분산 어플리케이션간 통신을 할 경우 데이터에 대한 암호화와 인증처리가 가장 중요한 부분이 될 것이다. 본 논문에서 제안한 시스템은 웹서비스 작업에서 클라이언트의 요청을 XML 서명 후 전송하여 요청을 받은 서버측에서 응답을 하기 전 정당한 클라이언트인가를 검증하는 단계를 거친다. 이렇게 함으로써 웹서비스 환경에서의 SOAP을 이용한 메시지계층 보안을 한층 강화시키려는 목적이다.

• The KIPS Transactions:PartB
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• v.15B no.5
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• pp.449-456
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• 2008

This paper proposed the agent-based web service platform that works toward providing coordination technique on web environment. The system described in this paper is designed and implemented to support web services between agents while maintaining web service module. The agent perform user's request dynamically with the proposed LDL, and it offer possibility of coordinated web services by performing commitment process to perform their goals with mutual cooperation for grouped agents. On experiments to check an implemented system, we found that the cost of module retrieval time is reduced and users are accessible.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.308-310
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• 2000

웹 환경의 성장으로 현재 GIS 응용은 기존의 랜 환경에서의 서비스를 웹에서도 할 수 있게 함으로써 보다 쉽게 다양한 사용자들이 서비스를 제공받도록 하고 있다. 이런 이유로 웹 환경에서의 GIS 응용은 다양한 사용자 층에 대한 요구를 만족시키기 위하여 다양한 서비스 데이터를 필요로 하고, 이 데이터들은 빠른 시간 내에 지속적으로 사용자의 요구를 만족시키기 위하여 변경되어야 한다. 그러나 이러한 데이터 변경을 서버에서 모두 한다는 것은 불가능하기 때문에 클라이언트가 데이터 변경이 필요할 때 적절히 변경을 할 수 있는 방법이 제시되어야 한다. 랜 환경에서의 공간 데이터 변경과는 달리 웹 환경에서의 공간 데이터 변경은 현재까지 환경의 차이와 이로 인한 프로토콜의 복잡함 등의 이유로 연구가 거의 이루어지지 않았다. 이 논문에서는 웹 환경에서 웹 클라이언트가 서버측의 공간 데이터를 변경하는 문제에 대해서 다루고 있다. 웹 환경에서 공간 데이터를 변경할 때 가장 문제가 되는 HTTP 프로토콜의 연결 해제(Connectioness)와 상태 비유지(Stateless)에 대한 해결책을 제시한다. 그리고 비정상적인 상황의 발생을 고려하여 잠금과 서버 데이터의 불일치를 해결하는 프로토콜을 설계하고 이에 대한 구현을 통하여 검증을 한다.

• Proceedings of the Korean Society for Information Management Conference
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• 2000.08a
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• pp.223-226
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• 2000

본 연구의 의의는 웹을 기반으로 한 이용자교육 시스템을 구축하여 웹 기반 대학도서관 이용자교육의 효율성을 검증해 보고자 함에 있다. 효율성 검증을 위해서 이용자교육시스템을 구축한 뒤 웹 기반 이용자교육의 참여유무를 독립변인으로 하고 피실험자들의 전반적인 서비스에 대한 인식도 및 도서관 자료활용능력을 종속변인으로 하여 이들의 차이를 서로 비교, 평가해 보자 한다.

• Journal of Korea Multimedia Society
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• v.11 no.1
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• pp.106-116
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• 2008

It is difficult to provide Web services on a mobile environment because of the intermittent disconnection of a wireless network and the frequent change of context information. To resolve this, Web services must be migrate to devices, which can provide services to users seamlessly. However, researches on hosting, migrating, and replicating Web services on mobile devices are still in an early stage. This paper presents a lightweight Web service framework and an efficient method for establishing a policy of migrating Web services. Based on the WS-Policy standard, the proposed method defines a policy schema, which provides constructs for describing various kinds of contextual information. Specifically, the schema is designed to be extensible enough for different service providers to use different vocabularies to describe their policies. To show the validity, the proposed method for establishing a migration policy has been applied to our mobile Web services framework, resulting in a seamless provisioning of services.

• The KIPS Transactions:PartD
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• v.19D no.4
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• pp.299-306
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• 2012

To fulfill the complex user requirement, composition web service comprised of existing services is considered from the efficient and reusable point of view instead of making entirely new web service. However, with the growing the number of web services which provide the same functionality but differ in quality value, the service composition becomes a decision problem on which component services should be selected such that end-to-end QoS constraints by the client and overall QoS of the composition service are satisfied. QoS of service aspects is a determinant factor for selecting the services, since the performance of the composed service is determined by the performance of the involved component web service. In this paper, hybrid genetic algorithm is presented to select component services to take part in the QoS-aware composition. The local search method is used to be combined with the genetic algorithm to improve the individuals (component service) in population as well as composed service. The paper also presents a set of experiments conducted to evaluate the efficiency of selection algorithm using the real web service data.