• 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 Internet Computing and Services
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• v.15 no.1
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• pp.45-53
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• 2014

UI-Mashup is widely used as a service method to add value, which is composed of distributed various contents on the internet and has turned out to be one of the latest trends in web application program development. Previous UI-Mashup-related studies have focused primarily on the dynamic service composition and have not been able to adapt to a rapidly changing Web Standard, thusthe end users conclude that UI-Mashups are slow, incompatible and poor security services. In this study, We propose an architecture for the performance improvements of UI-Mashup.In order to provide fast services and security enhancements, the proposed architecture collects UI fragments on the server in parallel, and sends layouts and contents of Mashups UI to the client through a special delivery channel supporting fast reaction and response time. In this study, the implementation and performance tests were proceeded to verify the proposed architecture experimentally. As a result of the performance testing, the proposed architecture has two to three times faster response time and more than four times throughput compared to the previous UI-Mashup technology.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.640-642
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• 2002

컴퓨터 통신기술이 급격히 발달하고 인터넷이 광범위하게 사용됨에 따라서 웹은 다양하며 무한한 용량의 데이터 원천으로 부각되었다. 그러나 웹의 사용이 지수적으로 증가함에 따라 웹 상에서 원하는 유용한 데이터를 찾고 구성하며 통합하는 일들이 매우 어렵게 되었다. 이러한 문제점을 극복하기 위해 1990년 말에 시맨틱 웹 기술이 소개되었다. 시맨틱 웹은 정보를 온톨로지로 구성함으로써 정보의 재사용성을 높여 주고 컴퓨터가 정보를 이해할 수 있도록 하여 이기종 간의 상호운용성을 보장한다. 더 나아가서는 에이전트에서 온톨로지를 판단, 재조합 함으로써 사용자가 원하는 서비스의 자동적인 실행과 추론을 할 수 있는 환경을 제공한다. 이와 같은 기능을 수행하는 시맨틱 웹을 위해 RDF(S), OIL, DAML SHOE와 같은 마크업 언어가 제안되었다. 그러나 이 언어들은 지식표현을 위한 프레임 시스템과 기술 로직 등에 기반을 두고 있기 때문에 몇 가지 문제점을 지니고 있다. 본 논문에서는 기존의 시맨틱 웹을 위한 마크업 언어의 문제점을 알아보고 효과적인 시맨틱 웹의 구현을 위해 필요한 마크업 언어의 요건을 연구ㆍ제안한다.

• Journal of KIISE:Software and Applications
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• v.36 no.10
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• pp.800-815
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• 2009

Recently, Web services based service-oriented architecture is widely used to integrate effectively various applications distributed on the networks. In the service-oriented architecture BPEL as a standard modeling language for the business processes provides the way to integrate various services provided by applications. Over the past few years, some types of studies have been made on testing compatibility of services and on discriminating and tracing of the business processes in the services composition. Now a lot of studies about the services composition with BPEL are going on. However there were few efforts to solve the problems caused by the services composition. Especially, there is no effort to evaluate whether a composite service is reliable and whether it is robust against to exceptional situations. In this paper, we suggest a test framework and a testing method for robustness of the composite service written in WS-BPEL. For this, firstly we extract some information from the BPEL process and the participant services. Next, with the extracted information we construct the virtual testing environment that generates various faults and exceptional cases which may be raised within the real services. Finally the testing work for robustness of a composite service is performed on the test framework.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.2
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• pp.143-157
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• 2008

Ubiquitous Web Services is able to be specified future Web Services technology for connecting with various application services in any device and network environments. The devices, in ubiquitous environment, have dynamic characteristic such as location and statuse. So, we must support methods of dynamic service discovery in ad-hoc network. There are many related works at transaction, security, QoS, semantic and Web Services composition with various fields. Recently, the studies are interested in the Ubiquitous by development of computing and network technology. However, they are an early stage. For this reason, in this paper, we propose a WSUN(Web Services on Universal Networks) for Ubiquitous Web Services. It is a SOA based framework. And this paper extracts necessity of WSUN environment from scenario. The framework is composed of US Broker(Universal Service Broker). It is designed for satisfying the conditions and supports dynamic service discovery using a US Registry (Universal Service Registry). Consequently. clients are able to discover and use Universal Service by protocol stack of the US Broker for Web Services. And it is a strong point which supports interoperability between heterogeneous networks.

• The Journal of Society for e-Business Studies
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• v.24 no.3
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• pp.53-71
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• 2019

As software systems become more complex and larger, software systems require a way to reuse software components or modules to provide new functionality. This paper designed a development method of web system combining SOA(Service Oriented Architecture) with MPSL(Multi-Software Product Line). According to provides SOA and MPSL, this paper suggested to service providers and service users to provide and reuse variable services. From the viewpoint of service provider, the suggested method identifies and implements reusable variable services as features by syntax-based, functional-based, and behavior-based methods applying feature identification guidelines and manages them as reuse assets. From the user's point of view, it is possible to develop a web system by constructing a service by workflow model as a method of structure and reconfigure services. As a result of measuring the reuse of the web system constructed in this paper by the function point, the cost reduction effect was verified by applying it to the similar project with the increase of reuse.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.07a
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• pp.347-349
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• 2012

디바이스 사용 환경이 다양해지면서 이를 고려한 반응형 UI/UX 개념이 대두되고 있다. 이를 위해 기존 데스크탑 기반의 UI에 국한되지 않고 다양한 모바일 디바이스 환경 및 사용자 특성을 고려한 적응적인 UI/UX를 제공해야 한다. 본 논문에서는 MPEG-21을 기반으로 반응형 웹 UI/UX를 제공하는 새로운 프레임워크를 제안한다. 기존 반응형 웹 디자인은 주로 조합한 여러 단위 기술을 이용하여 해상도의 변화에 반응하여 엘리먼트를 적응 시키는 방법을 사용한다. 제안하는 기술은 단일 프레임워크를 이용하여 컨텐츠 및 리소스를 보다 다양한 환경 정보를 사용하여 적응시킨다. 이는 기존 방법과 비교하여 서비스 제공자가 많은 종류의 리소스 및 데이터를 서비스 함에 있어 3rd 파티 컨텐츠 프로바이더의 참여 및 수정이 용이하도록 하였으며 자동으로 사용자 환경을 파악하여 맞춤형 컨텐츠 제공이 가능하도록 한다.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.2
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• pp.175-182
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• 2008

Context-aware service environment should provide many kinds of services according to users' requests. Users want a great variety of services. In response to their demands the service provider should make a new service every time. But making a new service every time may be inefficient even for a small number of users' requests. So, there are studies on how to efficiently support various and complex requests fFom users. In many researches, service compositions have lately attracted considerable attention. However, existing researches have mainly focused on Web services. So they are not proper to rapidly providing services in response to users' requests, especially In context-aware service environment. This paper proposes a rapid service composition using case-based reasoning. For evaluating the proposed algorithm we implement 'purchasing seTvice agent'. With this system, we compare our algorithm and the existing service composition algorithms.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.264-267
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• 2007

인터넷 사이트가 증가하면서 서비스 제공자는 사용자의 요구나 행동패턴을 파악하기 위하여 웹 마이닝 기법을 활용한다. 하지만 서버에 저장된 웹 로그 정보를 활용한 마이닝 기법은 전처리 과정에 많은 노력이 필요하고 사용자의 행동패턴이나 요구를 정확하게 파악하는데 한계가 있다. 이를 극복하기 위해 본 논문에서는 사용자 생성 로그정보를 이용한 방법을 제안한다. 제안 방법은 기존 서버에 저장되는 로그파일이 아닌 사용자의 행동에 의해 웹 페이지가 로딩될 때 마다 웹 마이닝에 필요한 정보를 수집하여 DB 에 저장하는 방법을 사용하였다. 이때 기존 로그파일에 로딩시간과 조회시간, 파라메타 정보를 추가하여 보다 사실적으로 사용자의 행동패턴을 파악하고자 하였다. 이렇게 생성된 로그파일을 기 등록된 메뉴정보, 쿼리정보와 조합하면 웹 마이닝에 필수적인 데이터정제, 사용자식별, 세션식별, 트랜잭션 식별등 전처리 과정의 효율성을 향상시키고 사용자의 행동패턴파악을 위한 정보 수집을 용이하게 해준다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.851-852
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• 2009

웹개발 기술의 빠른 발전에 따라 컴퓨팅 패러다임이 변화하고 있고, 이에 따라 클라우드 컴퓨팅이라는 새로운 시대가 열리고 있다. 또한 웹으로 공유된 다양한 정보와 서비스들은 사용자들에 의해 조합되어 매쉬업이라는 웹어플리케이션 형태로 등장하고 있다. 본 논문에서는 웹에 기반하여 접근성을 높이고 오픈 API의 사용이 용이하며 다양한 플랫폼으로 코드를 배포할 수 있는 개발도구의 구조를 제안한다. 또한 이 구조를 이용하여 UIzard라는 개발도구를 구현하고 이것을 이용한 지도 매쉬업의 실제 개발 사례를 평가하여 제안하는 웹기반 개발도구 구조의 높은 효율성을 확인하였다.