Hyung-Jik Lee

Electronics and Telecommunications Research Institute, Sŏul, Seoul, South Korea

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Publications (5)0 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Recent developments of information technologies are leading the advent of the era of ubiquitous healthcare service, which means healthcare services at any time and at any places. In a home, the ubiquitous healthcare service requires some context aware system for smart services using home network. In this paper, we propose a systematic design tool of a context aware system for ubiquitous healthcare service in a smart home, which is composed of a home gateway, a home server, a PDA, home network healthcare devices, and wearable sensors. We developed a context aware framework to send information from wearable sensors or healthcare devices to healthcare service entities as a middleware to solve the interoperability problem among sensor makers and healthcare service providers. And, we propose a design tool of ubiquitous healthcare services with the context aware framework in a systematic way. In order to show the feasibility of the proposed system, an application example is given, which is applied to a self check service.
    Future generation communication and networking (fgcn 2007); 01/2008
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    Eun-Jung Ko, Hyung-Jik Lee, Jeun-Woo Lee
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    ABSTRACT: In ubiqutious healthcare environment, user's health data are transfered to the remote healthcare server by the user's wearable system or mobile phone. These collected user's health data should be managed and analyzed in the healthcare server, so that care giver or user can monitor user's physiological state. In this paper, we designed and developed the intelligent Healthcare Server to manage the user's health data using CDSS and ontology. Our system can analyze user's health data semantically using CDSS and ontology, and report the result of user's physiological raw data to the user and care giver.
    01/2007;
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    ABSTRACT: A wearable system can be a key system for u-Healthcare, which means healthcare services at any time and at any places. A wearable system for u-Healthcare is composed of three parts: wearable computers, wearable sensor systems, and communication modules. A middleware is required in order to send the information gathered from wearable sensors to u-Healthcare service entities. The middleware should handle the problem of interoperability between information from sensors and u-Healthcare service entities. We develop a context aware framework as the middleware between wearable sensor systems and u-Healthcare service entities. An ontology based context model is designed for interoperability between context providing modules and u-Healthcare service entities. By using the same context model and the same API’s of the context aware framework in programming both context providing modules and u-Healthcare service entities, contexts from sensors can be sent to u-Healthcare service entities without the interoperability problem. In order to show the feasibility of the proposed system, some application examples are given, which are applied to a remote monitoring, and a self check service.
    12/2006: pages 4026-4029;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Recent developments of information technologies are leading the advent of the era of ubiquitous healthcare, which means healthcare services at any time and at any places. The ubiquitous healthcare service needs a wearable system for more continual measurement of biological signals of a user, which gives information of the user from wearable sensors. In this paper, we propose a wearable context aware system for ubiquitous healthcare, and its systematic design process of a ubiquitous healthcare service. Some wearable sensor systems are introduced with Zigbee communication. We develop a context aware framework to send information from wearable sensors to healthcare service entities as a middleware to solve the interoperability problem between sensor makers and healthcare service providers. And, we propose a systematic process of design of ubiquitous healthcare services with the context aware framework. In order to show the feasibility of the proposed system, some application examples are given, which are applied to remote monitoring, and a self check service.
    Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 02/2006; 1:5192-5.
  • Eun-Jung Ko, Hyung-Jik Lee, Jeon-Woo Lee
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    ABSTRACT: In this paper, we propose an Intelligent Context- Aware Service Engine based on two important standards, OSGi and Ontology. OSGi platform provides bundle management mechanism, so that we can easily control and manage several services. For reuse of the ontology, we designed two level’s ontology general context, domain context. The general context is generally used context concept in pervasive environment, and the domain concept is specified context ontology according domain area. As we design two level’s ontology, any system which uses context in pervasive environment could reuse our context ontology. As we use context ontology, our system has the following useful aspects. First, our system can describe types, hierarchies, relations of contexts, so that any context instance can be accommodated into the system with no additional effort. Seconds, our system could generate semantically perfect high-level context which is suitable for services. Third, our system could be applied to semantic web which is called a revolution of a post web and could provide interoperability.
    Computational Intelligence for Modelling, Control and Automation, 2005 and International Conference on Intelligent Agents, Web Technologies and Internet Commerce, International Conference on; 12/2005