• Journal of the Korea Safety Management & Science
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• v.11 no.1
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• pp.183-191
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• 2009

The purposes of this research are presenting a new business model by introducing USN/ZigBee and measuring productivity using BSC(Balanced scorecard), and becoming a cornerstone by presenting a prototype of ServiceScience which is getting more attention from Industrial Engineering and Management. The new business model consists of development of leak current monitoring sensor using USN/ZigBee and the adoption of RCM(Reliability-Centered Maintenance) using knowledge-based system at current distribution. Additionally, for the measurement of this new model's productivity, ESC is used, and the strategic map and measurement indices are produced. The main contributions of this paper are showing a concrete model of ServiceScience and demonstrating this model can be extended to similar areas like are gas, water etc.

• The Journal of the Korea institute of electronic communication sciences
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• v.4 no.2
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• pp.101-107
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• 2009

Modern society encounters various accidents due to industrialization and numbers of studies are going on to minimize damage from accidents. For prevention of accidents, it is necessary to design a system that helps making accurate judgment in emergency cases and is able to instantly manage each contingency. Various studies are currently going on contingency information system under ubiquitous environment. However, there have not been sufficient studies on the system that is able to monitor and process multiple contingencies and thus we still have difficulties in coping with multiple contingencies promptly. This study designs a RFID/USN middleware system for multiple contingencies control that receives data from various kinds of sensors and saves data after time marking thus is able to provide conjectured context when requested.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.4
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• pp.1015-1022
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• 2010

USN(Ubiquitous Sensor Network) environment that provides the service measured from sensors in real-time the information is delivered to application service. However, domestic service, application service provider environment between providers and users, most of the research are on the service platform architecture, and process the information detected by sensors between the providers of standard services platform architecture, which is a very weak level. In this paper, we proposed new service architecture though analysis of the OGC SWE(Sensor Web Enablement) with standards and research analysis of domestic standards. And we designed and implemented to each component of provider side.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.7
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• pp.1302-1308
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• 2010

In this study, Zigbee Sensor Node to transmit harmful gases CO and $CO_2$ information using wireless communication within the ground and underground structures were developed. Wireless communication protocol was used Zigbee Stack included IEEE 802. 15.4 MAC protocol. For wireless transmission of detected harmful gas signal from ADC of MCU was implemented Zigbee Sensor Node that was developed protocol using Serial-Port-Profile(SPP) here. The proposed Zigbee Sensor Node was verified transmission distance from experiments. Transmission distance was into 90m in experiments. Distance experiments were measured at 10m intervals using sine & pulse wave input signal at indoors. The proposed Route Sensor Node was applied mesh routing protocol. When built up USN(Ubiquitous Sensor Network)using Route Sensor Node, transmission distance was not limited. On the experimental results, harmful gas values between direct measurements and USN measurements were consistent. The semiconductor CO sensor and N-DIR $CO_2$ sensor module as a harmful sensor was used. Therefore, the proposed Zigbee Sensor Node was verified about reliability and validity to build USN for transmission of harmful gas information.

• Journal of the Korea Society of Computer and Information
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• v.13 no.7
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• pp.207-212
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• 2008

In EMC(electromagnetic compatibility) certification, the facilities and equipments have been considered as important qualification for registration of EMC certification business. In future, the certification environment is also supposed to be restricted Strictly. Many organizations have made on attempt to establish, certification environment as a international standard. Therefore, in order to enhance the competitive powers of domestic certification industry, a real-time system which can be measure automatically and remotely the temperature, humidity, illumination, CO/CO2, magnetic field, and human sensing is proposed in this paper. This system can also maintain the appropriate measurement environment by using USN (ubiquitous sensor network). The availabilities are confirmed through the experiment.

• Journal of the Korea Society of Computer and Information
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• v.15 no.8
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• pp.173-180
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• 2010

This research aims to enhance the security and safety of bicycle facilities by utilizing convergence technology of ubiquitous sensor network in the transportation system. To achieve the aim, U-bike system has developed by utilizing sensor network technology, and the serviceability and safety function of public facilities in the system have enhanced. This research also presents a plan for the construction of U-bike using ubiquitous sensor network and safety infrastructure of facilities by analyzing bicycle traffic reports and characteristics of service through studying the literature on the security of bicycles and the safety of facilities on bicycle lanes. The result of this research will contribute to the enhancement of safety function of bicycle lanes and facilities around National 4 major rivers bicycle lanes in the future.

• Journal of the Korean Society of Safety
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• v.23 no.6
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• pp.51-56
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• 2008

As RFID/USN technology is used in the latest industry trend, the information analysis paradigm shifts to intelligence service environment. The intelligent service includes autonomic operation, which select activity by defining itself to the status of industry facilities. Furthermore, information analysis based on IT used to frequently data mining for detecting the meaning information and deriving new pattern. This paper suggest self-classifying of context-aware by applying data mining in gas facilities for serving the intelligent gas safety management. We modify data algorithm for fitting the domain of gas safety, construct context-aware model by using the proposed algorithm, and demonstrate our method. As the accuracy of our model is improved over 90%, the our approach can apply to intelligent gas safety management based on RFID/USN environments.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.599-600
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• 2009

현재 센서 네트워크의 보안 기술 연구는 센서 네트워크 내의 정보전달 및 처리과정에서의 정보 보호 및 중요 센서 노드의 보호를 위한 정보인증, 노드인증, 보안 라우팅, 키 관리, 도처, 위조 방지 등에 중점을 두고 진행되고 있다. 그러나 대부분의 연구는 USN 응용 서비스 유형에 종속되는 단점을 가진다. 즉, 특정 서비스에만 유용한 보안 기술 연구가 대부분이라 하겠다. 따라서, 특정 USN 응용 서비스에 국한되지 않는 다양한 USN 응용 서비스를 지원할 수 있는 정보보호 기술이 개발이 이루어져야 하며, 이를 위해서는 다양한 USN 응용 서비스를 지원할 수 있도록 보안을 고려한 센서 네트워크의 구성에 대한 연구가 선행되어야 한다. 이에 본 논문에서는 현재 개발된 다양한 USN 응용 서비스를 분석하여 공통적인 센서 네트워크의 구성 요소를 도출하였으며, 이를 토대로 보안을 고려한 센서 네트워크 분류기준을 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.422-425
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• 2008

최근 IT 기술의 발전과 더불어 다양한 종류의 컴퓨터가 사람, 사물, 환경 속으로 스며들어 네트워크 망을 이루는 USN(Ubiquitous Sensor Network) 환경이 급속히 보급되고 있다. USN 환경에서 수집되는 센서 스트림 데이터는 연속적이며 동적으로 끊임없이 전달이 되기 때문에 그 양이 방대하며 또한 제한된 메모리를 사용하기 때문에 모든 데이터를 저장하여 처리할 수는 없게 된다. 스트림 데이터의 이러한 특성 때문에 본 논문에서는 입력되는 스트림 상황정보에 대해서 신속한 상황 분석 서비스를 진행하기 위하여 슬라이딩 윈도우 기법을 지원하는 상황정보 분석 시스템을 제안한다. 이 시스템은 온도, 습도, 조도 등 스트림 데이터에 대해서 WHEN-DO 상황질의모델을 적용하여 상황질의모델의 조건 만족 여부를 판단하고 특정 행동을 취한다. 따라서 본 논문에서 제안한 시스템은 실시간 건물의 상황정보를 수집하여 상태를 모니터링 하는 등 많은 USN 응용분야에 적용이 가능하다.

• Electronics and Telecommunications Trends
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• v.21 no.1 s.97
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• pp.14-24
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• 2006

유비쿼터스 시대가 다가옴에 따라 핵심 기술 중 하나인 유비쿼터스 센서 네트워크(USN)에 대한 관심이 높아지고 있다. 센서 노드를 이용한 다양한 정보를 수집 처리할수 있는 USN 기술은 물류/유통, 환경 감시, 홈 오토메이션 등 다양한 분야에 적용될 수있기 때문에 갈수록 그 중요성은 높아질 것으로 예상된다. 이에 현재 USN의 시장 동향을 간단히 살펴보고, 센서 노드의 핵심이 되는 센서 노드 플랫폼과 센서 노드에 들어가는 센서 네트워크 운영체제의 기술 동향에 대해 살펴보고자 한다.