• Journal of the Institute of Electronics Engineers of Korea CI
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• v.44 no.2 s.314
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• pp.47-59
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• 2007

Recently, Healthcare system has not been standardized and has been developed as an embedded system lacking interoperability. We are finally going to face such problems as having excessive load in using network caused by the uncontrolled spread of system and un-guaranteed interoperability among the heterogeneous systems. We suggest the possibility that OSGi and JADE can be accepted as a solution for the above problems.

• Journal of Institute of Control, Robotics and Systems
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• v.14 no.3
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• pp.248-253
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• 2008

This paper presents a sensing system for smart home which can detect an location transition events such as entrance/exit of a member and identify the user in a group at the same time. The proposed system is compose of two sub-systems; a wireless sensor network system and a database server system. The wireless sensing system is designed as a star network where each of sensing modules with ultrasonic sensors and a Bluetooth RF module connect to a central receiver called Bluetooth access point. We propose a method to discriminate a user by measuring the height of the user. The differences in the height of users is a key feature for discrimination. At the same time, the each sensing module can recognize whether the user goes into or out a room by using two ultrasonic sensors. The server subsystem is a sort of data logging system which read the detected event from the access point and then write it into a database system. The database system could provide the location transition information to wide range of context-aware applications for smart home easily and conveniently. We evaluate the developed method with experiments for three subjects in a family with the installation of the developed system into a real house.

• Journal of the Korean Institute of Intelligent Systems
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• v.20 no.2
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• pp.304-310
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• 2010

Chronic pain and herniated disk is a common disease that 80% of adults are experienced. There diseases rates of caused by the physical shock, such as the traffic accident, and the accidental fall is about 10%. And the most of these diseases is caused by having habitual incorrect position. People know that incorrect position would cause to accumulate continuous stress, but it is not easy to correct position. Because it does not recognize incorrect position repeated habitual consequently. This system collects data of user position after sensors that could measure position attach on use and presumes correct position used by position presumption algorithms. Its system purpose is continuing incorrect position could be aware to user and lead to change to correct position to prevent habituation of incorrect position. If habitual of correct position continues through accurate measurement and repeating cognitive learning, it would help for children and chronic patience.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.3
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• pp.734-741
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• 2008

The modern people effort to lead good life. Specially, the patients which prevention of a disease only is cure from this diabetes patient, the old and weak, the hospitals needing a treatment through exercises, and receive medical treatment in houses cure exercise according to exercise prescription. These papers developed a Ubiquitous Care Management system based on Zigbee. This is a system supporting so as accumulation manages the exercise history information that occurred when get exercises prescription, and exercise systematically, and to do preventive of a disease. Can confirm own exercise history and health information through web pages, and this system notifies contents about an exercise treatment to patients as use a cellular phone.

• The Journal of the Korea Contents Association
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• v.7 no.7
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• pp.153-160
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• 2007

Be new, and various service is created through Ubiquitous Computing and Ubiquitous networks. Specially, recognize a situation of the object like a person and things, and Ubiquitous Location Based Services(u-LBS) to provide service to be useful to early bases is coming wherever to the front by important service when. This papers developed eCRM Mobile Marketing System. This Mobile Marketing System for the eCRM which they developed used location based in order companies currently used eCRM, and to more efficiently do customer Marketing.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.42-50
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• 2018

The majority of existing falling recognition techniques provide service by recognizing only that the falling occurred. However, it is important to recognize not only the occurrence of falling but also the situation before and after the falling, as well as the location of the falling. In this paper, we design and propose the falling notification service system to recognize and provide service. This system uses the acceleration sensor of the smartphone to recognize the occurrence of a falling and the situation before and after the falling. In order to check the location of falling, GPS sensor data is used in the Google Map API to map to the map. Also, a crosswalk map converted into grid-based coordinates based on the longitude and latitude of the crosswalk is stored, and the locations before and after falling are mapped. In order to reduce the connection speed and server overload for real-time data processing, fog computing and cloud computing are designed to be distributed processing.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.09a
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• pp.355-359
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• 2010

최근 스마트폰이 급속히 보급됨에 따라 다양한 모바일 컨텐츠와 어플리케이션에 대한 요구들이 점차 증가하고 있다. 앱 스토어를 통한 지속적이고 다양한 컨텐츠의 생산은 사용자의 선택권을 확대시켜주는 이점은 있는 반면에 사용자가 원하는 것은 직접 찾아야 함으로 많은 시간과 노력이 요구된다. 따라서 미래에는 동적으로 변하는 상황에 따라 맞춤형 컨텐츠를 제공하기 위한 상황 인식 기술이 요구될 것으로 예상된다. 본 논문에서는 모델 기반의 상황 모델링을 통해 상황 인식 서비스의 개발 기간 단축과 재사용성을 제고 하였고, 이 상황 모델과 공간 정보를 결합하여 넓은 지역에 걸친 다양한 도메인에 적용할 수 있는 공간 기반 상황 인식 서비스를 제시하였다.

• Journal of Korea Multimedia Society
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• v.21 no.2
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• pp.158-165
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• 2018

Since a large amount of multimedia image has dramatically increased, it is important to search semantically relevant image. Thus, several semantic image annotation methods using RDF(Resource Description Framework) model in mobile environment are introduced. Earlier studies on annotating image semantically focused on both the image tag and the context-aware information such as temporal and spatial data. However, in order to fully express their semantics of image, we need more annotations which are described in RDF model. In this paper, we propose an annotation method inferencing with RDFS entailment rules and user defined rules. Our approach implemented in Moment system shows that it can more fully represent the semantics of image with more annotation triples.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06c
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• pp.281-286
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• 2007

유비쿼터스 컴퓨팅이란 사용자에게 지속적인 서비스를 제공해주는 컴퓨팅 환경을 말한다. 끊임없이 동적으로 변하는 유비쿼터스 환경에서 수많은 상황데이터가 발생을 하고 상황정보로 추상화하는 과정이 필수적이다. 상황인지시스템은 동적인 상황정보에 대한 생성, 조작, 공유 등이 일관성 있게 이루어져야 한다. 이러한 상황정보의 조작을 위한 수많은 상황인지 모델이 제시되고 연구되어 왔다. 본 논문에서는 유비쿼터스 환경을 위한 온톨로지 기반 상황인지 시스템을 제시한다. 상황정보에 대한 생성, 컨텍스트 추론, 지식의 공유을 위해 온톨로지 표준언어인 OWL을 사용한 컨텍스트 온톨로지를 생성한다. 디바이스의 상황정보 생성을 위해 SWRL 규칙언어를 사용하고 생성된 디바이스 상황에 고장진단 및 수리서비스를 제공하기 위해 규칙추론기반 언어인 Jess를 사용하고 OWL기반의 컨텍스트 온톨로지와의 연계를 위해 Jess Tab API를 사용한다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.91-93
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• 2012

최근 모바일 컴퓨팅 환경 지원을 실현하기 위한 연구가 전 세계적으로 활발히 진행되고 있으며, 나아가 그 중요성은 점점 더 증가하고 있다. 모바일 컴퓨팅 환경에서 지능형 서비스를 제공하기 위해서는 상황 데이터를 수집하고 적절한 가공을 통해 상황정보로 변환시켜 해석, 추론 및 학습 과정을 거쳐 사용자의 상황에 맞는 적절한 서비스를 제공할 수 있어야 한다. 본 논문은 모바일 환경에서 단일 상황추론의 한계를 개선하는 다중 상황추론과 완전히 형성되지 않은 상황정보를 기반으로 한 상황추론으로 불확실성을 지원하는 다중추론지원 분산형 상황인식 시스템을 제안한다.