• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.1B
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• pp.53-61
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• 2010

M2M Platform is the future ubiquitous network technologies which provide the integrated service with the networks and devices. It requires the standardized message protocols among the sensor applications. In this study, we developed the message protocols that support the data abstraction and interoperability among application systems with characteristics of sensor systems. The message protocols consist of the data representation formats and data exchange functions.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.11a
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• pp.705-708
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• 2006

IT 정보 기술발전에 힘입어 시간과 장소에 제약받지 않고 언제, 어디서나 네트워크 서비스를 이용할 수 있는 유비쿼터스 시대에 우리가 살고 있다. 이러한 유비쿼터스 환경에서 자주 언급되고 핵심 기술로 부각되고 있는 것이 USN(ubiquitous sensor network)의 센서(sensor) 기술이며, 센서를 이용한 응용 기술 연구가 활성화되어 있다. 이러한 센서 기술 개발로 유비쿼터스 환경이 진일보 우리 생활에 영향을 미치고 있지만 향후 센서를 이용한 실생활 접목 기술 또한 더욱 활성화 될 것으로 보인다. 이에 본 논문에서는 유비쿼터스 환경에서 기본으로 구성되어야 할 기술인 센서 네트워크에 대한 개요를 살펴본다. 또한 센서로부터 생체 데이터 획득(예, 체온, 맥박 등)을 센서로부터 실시하여 질병 진단을 수행하기 위한 운영체제를 살펴보며, 본 연구를 기반으로 구축하게 될 센서를 이용한 의료진단 시스템 데이터 모델링과 의료진단 시스템 구축을 위한 구정에 관하여 살펴본다.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.238-240
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• 2010

최근에는 U-City 등 유비쿼터스 기반의 각종 시스템 및 기술이 개발되어 우리의 생활을 보다 편리하도록 한다. 본 논문에서는 USN의 응용이라고 할 수 있으며, 일정한 공간 내 혹은 외부의 환경요소를 수집하여 원격으로 확인할 수 있는 시스템에 대해 연구한다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10b
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• pp.291-295
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• 2007

본 논문에서는 유헬스를 위한 적응형 미들웨어를 제안한다. 제안하는 적응형 미들웨어의 특징은 USN(Ubiqitous Sensor Network)과 RFID를 동시에 지원하는 미들웨어로 다음과 같은 특징을 가진다. 첫째, 사용자 인식수단으로 RFID 태그와 Zigbee sensor를 동시에 지원한다. 둘째, RFID Reader와 Zibee 센서가 수집한 데이터를 filtering하여 주기적으로 응용 프로그램에 전달한다. 셋째, 이동하는 사용자에 대하여 realtime health monitoring을 지원한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.1077-1080
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• 2009

Dense meteorological data are hard to be collected on the limited urban areas because of vest cost which is required to install the corresponding sensors on the areas. Recently, to overcome this problem, the sensor network technique comes to the fore. This paper studies an application to service the meteorological map using mobile phone sensors. A design results for system implementation are introduced in this paper.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.507-510
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• 2014

The initial process configuration of biometric information system is performed by the same sequences statically and consistently without changing after the system is running. However, this static process configuration appears an inefficient performance to the applications of the mobile biometric information system in the mobile computing environment. This work proposes the dynamic process design and execution method as a way to overcome these inefficient processes.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.543-545
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• 2011

최근 유비쿼터스에 대한 관심이 높아지고 있고 이에 대한 응용기술인 USN(Ubiquitous Sensor Network) 기술을 사용하여 사용자가 편리한 삶을 살기 위한 기술이 늘어나고 있다. 본 논문에서는 이 중에 하나인 센서를 기반으로 한 블라인드 시스템에 대해서 기술한다. 이 스마트 블라인드는 빛의 양을 조도센서를 이용해 측정하여 자동적으로 동작하도록 제어하는 시스템을 적용한 스마트 블라인드에 대해서 기술했다. 사용자가 편리하도록 블라인드를 제어할 수 있는 시스템을 개발하고 실제 적용하는데 그 목적이 있고 이를 위해서 조도센서를 이용하여 빛 감지 후 빛의 양을 파악하고 그 데이터 값으로 모터를 동작시켜서 블라인드를 제어한다.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.2
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• pp.64-70
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• 2011

Portable artificial electronic nose (E-nose) system suffers from noisy fluctuation in surroundings such as temperature, vapor concentration, and gas flow, because its measuring condition is not controled precisely as in the laboratory. It is important to develop a simple and robust vapor recognition technique applicable to this uncontrolled measurement, especially for the portable measuring and diagnostic system which are expanding its area with the improvements in micro bio sensor technology. This study used a PDA-based portable E-nose to collect the uncontrolled vapor measurement signals, and applied the image matching algorithm developed in the previous study on the measured signal to verify its robustness and improved accuracy in portable vapor recognition. The results showed not only its consistent performance under noisy fluctuation in the portable measurement signal, but also an advanced recognition accuracy for 2 similar vapor species which have been hard to discriminate with the conventional maximum sensitivity feature extraction method. The proposed method can be easily applied to the data processing of the ubiquitous sensor network (USN) which are usually exposed to various operating conditions. Furthermore, it will greatly help to realize portable medical diagnostic and environment monitoring system with its robust performance and high accuracy.

• Journal of the Korea Society of Computer and Information
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• v.15 no.9
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• pp.35-46
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• 2010

Sequential pattern mining is one of the essential data mining tasks, and it is widely used to analyze data generated in various application fields such as web-based applications, E-commerce, bioinformatics, and USN environments. Recently data generated in the application fields has been taking the form of continuous data streams rather than finite stored data sets. Considering the changes in the form of data, many researches have been actively performed to efficiently find sequential patterns over data streams. However, conventional researches focus on reducing processing time and memory usage in mining sequential patterns over a target data stream, so that a research on mining more interesting and useful sequential patterns that efficiently reflect the characteristics of the data stream has been attracting no attention. This paper proposes a mining method of sequential patterns over data streams with a gap constraint, which can help to find more interesting sequential patterns over the data streams. First, meanings of the gap for a sequential pattern and gap-constrained sequential patterns are defined, and subsequently a mining method for finding gap-constrained sequential patterns over a data stream is proposed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.362-364
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• 2011

To build ubiquitous agriculture environment successfully, development of core technology for agriculture, such as sensor node H/W, sensor node middleware platform, routing protocol and agricultural environment application service is essential. With the application of u-IT technologies to traditional agriculture area, fusion complex technologies become a source to raise value-added agriculture product and its productivity. However, it is imperative to expand horticulture industry area and improve infrastructure for utility-based horticulture. This paper proposes an agriculture product growth environment management system that utilizes environmental factor monitoring sensors and biological information sensors in greenhouse to specifically manage botany growth environment management.