• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.117-122
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• 2002

In this paper, we propose Media GIS web service architecture using 3D geographical database and GPS-related data resulted from 4S-Van. We introduce a novel interoperable geographical data service concept; so-called, Virtual World Mapping (VWM) that can map 3D graphic world with real-world video. Our proposed method can easily retrieve geographical in-formation and attributes to reconstruct 3D virtual space according to certain frame in video sequences. Our proposed system architecture also has an advantage that can provide geographical information service with video stream without any image processing procedures. In addition to, describing the details of our components, we present a Media GIS web service system by using GeoVideo Server, which performs VWM technique.

• 한국컴퓨터정보학회논문지
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• 제22권9호
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• pp.91-97
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• 2017

IoT (Internet of Things) systems are based on heterogeneous hardware systems of different types of devices interconnected each other, ranging from miniaturized and low-power wireless sensor node to cloud servers. These IoT systems composed of heterogeneous hardware utilize data sets collected from a particular set of sensors or control designated actuators when needed using open APIs created through abstraction of devices' resources associated to service applications. However, previously existing IoT services have been usually developed based on vertical platforms, whose sharing and exchange of data is limited within each industry domain, for example, healthcare. Such problem is called 'data silo', and considered one of crucial issues to be solved for the success of establishing IoT ecosystems. Also, IoT services may need to dynamically organize their services according to the change of status of connected devices due to their mobility and dynamic network connectivity. We propose a way of dynamically composing IoT services under the concept of WoT (Web of Things) where heterogeneous devices across different industries are fully integrated into the Web. Our approach allows developers to create IoT services or mash them up in an efficient way using Web objects registered into multiple standardized horizontal IoT platforms where their resources are discoverable and accessible. A Web-based service composition tool is developed to evaluate the practical feasibility of our approach under real-world service development.

• 한국정보통신학회논문지
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• 제14권8호
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• pp.1799-1808
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• 2010

최근 증가하는 협업 연구는 원격 의료 데이터 공유 및 외부 기관의 데이터 접근을 요구하고 있다. 본 논문에서는 융통성 있고 효율적인 의료 데이터 관리를 위해 웹서비스를 이용하여 그리드와 PACS 간의 상호운용성 프레임워크를 제안하고 구현하였다. DICOM 표준은 PACS와 이미지 데이터베이스 사이에 의료 이미지 데이터의 교환과 전송을 정의한다. 그러나 병원들 간 의료 데이터 교환은 신뢰할 수 있는 기관들 사이에서만 제공된다. 더군다나 DICOM은 의료 데이터 관리 기능을 제공하지 않고 그리드 미들웨어는 DICOM 데이터에 접근 가능한 표준 툴킷을 제공하고 있지 않고 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 PACS 간의 연동과 의료 데이터 관리를 가능하게 하는 웹 서비스기반의 그리드 서비스 중계자(Web Services-based Grid Service Mediator, WGSM)를 개발하였다. WGSM은 압축 중계자, GridFTP 중계자, RFT 중계자, MyProxy 중계자, MDS 중계자, RLS 중계자 등으로 구성된다. 제안한 웹서비스 기반의 프레임워크는 협업 환경에서 PACS 간 사용자 인증 및 안전한 데이터 접근을 제공한다. 특히, WGSM은 일반 사용자들이 그리드 미들웨어에 대한 어떠한 지식이 없어도 간단하고 효율적인 방법으로 원격 PACS를 접근할 수 있게 한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권5호
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• pp.836-858
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• 2010

Web Services allow a user to integrate applications from different platforms and languages. Since mobile applications often run on heterogeneous platforms and conditions, Web Service becomes a popular solution for integrating with server applications. However, because of its verbosity, XML based SOAP messaging gives the possible overhead to the less powerful mobile devices. Based on the mobile client's behavior that it usually exchanges messages with Web Service continuously in a session, we design the Handheld Flexible Representation architecture. Our proposed architecture consists of three main components: optimizing message representation by using a data format language (Simple_DFDL), streaming communication channel to reduce latency and the Context-store to store context information of a session as well as redundant parts of the messages. In this paper, we focus on the Context-store and describe the architecture with the Context-store for improving the performance of mobile Web Service messaging. We verify our approach by conducting various evaluations and investigate the performance and scalability of the proposed architecture. The empirical results show that we save 40% of transit time between a client and a service by reducing the message size. In contrast to solutions for a single problem such as the compression or binarization, our architecture addresses the problem at a system level. Thus, by using the Context-store, we expect reliable recovery from the fault condition and enhancing interoperability as well as improving the messaging performance.

• 대한원격탐사학회지
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• 제19권1호
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• pp.71-80
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• 2003

In this Paper, we Propose web-based Media GIS architecture using 3D geographical database and GPS-related data resulted from 45-Van. We introduce a novel interoperable geographical data service concept; so-called, Virtual World Mapping (VWM) that can map 3D graphic world with real-world video. Our proposed method can easily retrieve geographical information and attributes to reconstruct 3D virtual space according to certain frame in video sequences. Our proposed system architecture also has an advantage that can provide geographical information service with video stream without any image processing procedures. In addition to, describing the details of our components, we present a Media GIS web service system by using GeoVideoServer, which performs VWM technique.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.414-415
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• 2011

Due to heterogeneity in Data and Processes, healthcare systems are facing the challenge of interoperability. This heterogeneity results in different healthcare workflows of each individual organization. The compatibility of these heterogeneous workflows is possible when standards are followed. HL7 is one of the standards that is used for communicating medical data between healthcare systems. Its newer version V3 is providing semantic interoperability which is lacking in V2. The interoperability in HL7 V3 is only limited to data level and process level interoperability needs to be catered. The process level interoperability is achieved only when heterogeneous workflows are aligned. These workflows are very complex in nature due to continuous change in medical data resulting in problems related to maintenance and degree of automation. Semantic technologies plays important role in resolving the above mentioned problems. This research work is based on the integration of semantic technology in HL7 V3 standard to achieve semantic process interoperability. Web Service Modeling Framework (WSMF) is used for incorporating semantics in HL7 V3 processes and achieves seamless communication. Interaction Ontology represents the process artifacts of HL7 V3 and helps in achieving automation.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.553-556
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• 2003

The objective of this study is to implement geological functions on the Internet such as the visualization, search and analysis of geological data. To improve their performance and reduce the cost during development, special concerns should be given to the dynamic integration and interoperability of them. XML Web Service technologies can be adopted and OpenGIS specifications should be considered for the integration of distributed GIS components and their interoperability. Because standard Internet protocols and XML Messages are used in the Web Service, it makes the integration among different hardware and software systems possible. OpenGIS specifications also enable users to get benefits from geographic information and services across any network, platform and application. A prototype of efficient Internet GIS applications has been suggested in this study.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.283-286
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• 2004

This paper refers and implements XML Web services, which supports networked interchanges of moving object information. XML Web services are expected to be fundamental building blocks in the move to distributed computing on the Internet. As an interchange format, GML encodes semantics, syntax, and schema of geospatial and geoprocessing-related information resources. It can give great benefits to utilize raw data easily as an XML encoding format does. This paper proposes a full coverage of interoperable location trajectory services consisting of 3 independent modules: a moving object database, a data processing server, and a web services interface module. For communications, SOAP protocols and WSDL documents are used, which can guarantee an interoperability of a system regardless of different platforms and service channels. This paper also designs a GML data format that represents location information of probe cars.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.340-342
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• 2003

Location based services based on positions of moving objects are expanding the business area gradually. The location is included all estimate position of the future as well as the position of the present and the past. Location based routing service is active business application in which the position information of moving objects is applied efficiently. This service includes the trajectory of past positions, the real-time tracing of present position of special moving objects, and the shortest and optimized paths combined with map information. In this paper, we describes the location based routing services is extend in distributed web GIS environment. Web GIS service systems provide the various GIS services of analyzing and displaying the spatial data with friendly user - interface. That is, we propose the efficient architecture and technologies for servicing the location based routing services in distributed web GIS environment. The position of moving objects is acquired by GPS (Global Positioning System) and converted the coordinate of real world by map matching with geometric information. We suppose the swapping method between main memory and storages to access the quite a number of moving objects. And, the result of location based routing services is wrapped the web-styled data format. We design the schema based on the GML. We design these services as components were developed in object-oriented computing environment, and provide the interoperability, language-independent, easy developing environment as well as re - usability.

• 한국도서관정보학회지
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• 제36권3호
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• pp.109-136
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• 2005

이 논문에서는 데이터를 효율적으로 공유하기 위해서 제정된 ISO/IEC 11179 메타데이터 레지스트리(Metadata Registry, 이하 MDR) 표준에 관한 내용을 먼저 기술하고, 이 표준에 근거한 시스템간의 데이터 공유의 폭을 넓히기 위해서 W3C에서 개발한 시맨틱웹의 핵심기술과 웹온톨로지 언어(RDF/OWL)를 소개하고 마지막으로 기존의 인간가독형 MDR을 기계가독형으로 구축하기 위한 기본설계 초안을 RDF/OWL 기반으로 작성하였다. 앞으로 이러한MDR이 구축되어 널리 활용된다면 다양한 형태의 고급 정보서비스가 가능할 것으로 판단된다. 메타데이터 요소 정의, 온톨로지의 개념 및 메타데이터 스키마 정의가 기계가독형으로 통합된다면 이용자에게 더욱 정교한 맞춤서비스를 제공할 수 있을 것으로 기대된다. 미래의 과제는 시맨틱 기반MDR의 유용성에 대해서 실험연구를 통한 객관적 평가를 수행하는 것이다.