• The Journal of the Korea Contents Association
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• v.10 no.2
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• pp.63-71
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• 2010

In this paper, we propose the Agricultural Environment Monitoring System based on Sensor Network which can collect information of crop cultivation environment and monitor it in real-time by using various environment sensors. Existing wireless sensor nodes, based on the sensor network, require extra conversion/control module depending on the characteristics. To solve this problem, we developed an integrated sensor module which can integrate various kinds of sensors used to obtain the necessary information for the area under crop cultivation. In addition, we developed sensor networks monitoring system which is suitable for an integrated sensor module. To verify the operating status of the proposed system, an integrated sensor node is installed in the test environment so that it can sense information of the environment and monitor it in real-time.

• Journal of Korea Spatial Information System Society
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• v.11 no.3
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• pp.31-39
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• 2009

Requirement level regarding processing and managing real-time datastream in an ubiquitous environment is increased. Especially, due to the unbounded, high frequency and real-time characteristics of datastream, development of specialized stroge manager for DSMS is necessary to process such datastream. Existing DSMS, e.g. Coral8, can support datastream processing but it is not scalable and cannot perform well when handling large-volume real-time datastream, e.g. 100 thousand over per second. In the case of Oracle10g, which is generally used in related field, it supports storing and management processing. However, it does not support real-time datastream processing. In this paper, we propose specialized storage manager of DSMS for real-time compressed storing on semiconductor or LCD production facility of Samsung electronics, Hynix and HP. Hynix and HP. This paper describes the proposed system architecture and major components and show better performance of the proposed system compared with similar systems in the experiment section.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.187-195
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• 2008

In MANET, it is important to efficiently manage data objects and traffic to improve network throughput and response time. This paper proposes a connection-degree based data object search and replication scheme in mobile ad-hoc networks. In this method, information about the path data object providers is stored at the cache of a cluster header at which lots of queries arrive, so that, to reduce the load of the cluster header, replicas can be created at its neighboring nodes. The method proposes an algorithm that picks up a cluster header among mobile nodes and makes it possible to search for and utilize adaptive and up-to-date information in MANET. The method is expected to be effective since it enables access to data objects in spite of broken links among mobile nodes with an enhancement in network response time of searching and a decrease in communication costs. The efficiency of this system was verified via simulation.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.2
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• pp.189-197
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• 2013

With the trend of technological advances in electronic communications and the advent of ubiquitous environments, the density of existing electronic equipment in the surroundings is increasing significantly. It is hence great importance to study the numerically efficient and fast algorithm for complex and large environments to identify their electromagnetic compatibility and interference characteristics of equipments installed in those structure. This paper introduces a statistical-based power balance method(PWB) for the analysis of these problems and considers its practical utility. The 2-dimensional lossy rectangular cavity was numerically revisited to clarify its relationship with the classical deterministic analysis solutions based on the Maxwell's equation. It can be shown that the statistical assumptions and analysis results from the power balance method correspond to the volume average over the realistic deterministic domain. This statistical power balance approach should be a sufficiently practical alternative to the electromagnetic problem of complex and large environment since it is apparent that the full-wave analysis methods have some severe limits of its computational burdens under the situation of complex and large environment.

• 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 Digital Convergence
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• v.12 no.11
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• pp.265-272
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• 2014

This study suggests a system for preventing and coping with diverse industrial accidents available for taking place in the industrial field by designing a context-aware system of the solar cell equipment with the use of multi-sensor. It installs multi-sensor in the surrounding and major positions of the solar cell equipment, acquires data on the surrounding situations and solar cell equipment from this device, and then save it into the local memory and transmits it to the server. The saved data recognizes a situation based on the context-aware algorithm and judges depending on the perceived result. An administrator comes to have environment available for monitoring the status on the production field and equipments with real time according to the judged outcome through the context-aware algorithm. The context-aware system in the industrial field, which is put today in the ubiquitous environment, will become a service of offering appropriate information for dealing with industrial accidents through real-time inspection.

• 한국IT서비스학회:학술대회논문집
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• 2009.05a
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• pp.121-121
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• 2009

u-City는 첨단 정보통신 인프라를 활용하여 유비쿼터스 서비스를 도시공간에 제공함으로써 도시민의 생활편의 증대와 삶의 질을 높이고 체계적인 도시관리 및 도시의 제반 기능의 혁신을 통해 도시 경쟁력 향상을 목표로 한다. 최근 u-City의 핵심부문으로, u-City의 성공적 구축을 위해 관심이 집중되고 있는 도시통합운영센터는 기존 도시에서는 시도해 보지 않았던 새로운 개념으로, U-City법에서 향후 U-서비스의 관리 운영에 필수적인 U-City기반시설로 규정되어 있기는 하지만 도시통합운영센터에 대한 명확한 기준이 없다. 또한 구축 관리 운영을 위해 필요한 법 제도적 기반환경이 미흡한 실정으로, 법적 근거없이 개별법에 의한 사업추진으로 실제로 도시통합운영센터를 구현하는데 많은 어려움을 겪고 있다. 이와 같이 u-City와 도시통합운영센터는 기존 도시에서는 시도해 보지 않았던 새로운 개념이기 때문에 현행 법에 맞지 않는 경우 발생하기 때문에 이에 적합한 새로운 법/제도가 필요하다. 본 연구는 기존 관련법과의 연계를 통한 도시통합운영센터 구축 운영에 대한 법 제도적 기반환경 마련을 위한 연구로서, u-City 관련 법/제도 중 도시통합운영센터 구축 및 운영 관련 사항에 대한 검토를 통해, 법/제도적 측면에서 도시통합운영센터 구현에 필요한 제반사항을 검토하였다. 구축측면 (계획/건설)에서 시스템 공동활용 및 연계 구축 방안 마련을 위해 도시통합운영센터 구축주체, 재원조달방법을 검토하였으며, 운영측면에서 도시통합운영센터 운영 방안을 마련하기 위해 도시통합운영센터의 공공기능 수행 및 운영에 대한 사항을 분석하였다. 도시통합운영센터 구축 운영에 대한 법 제도 정비를 위한 기반연구를 통해 도시통합운영센터의 성공적인 구축 및 운영을 도모하고자 한다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.1
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• pp.69-75
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• 2010

Today, our country is experiencing serious graying without parallel. The government is executing various services and welfare policies to solve this problem using ubiquitous technology. But the old and disabled people are not good for using the u-service and system, because it is made for ordinary people. The purpose of this study is to solve the graying society-problem and improve the eldery as well as disabled's quality of life by integrating each information centers based on ESB(Enterprise Service Bus). The results of this study can be divided by system architecture and communication system for the eldery and disabled. The research development results of this study can be used to build the integrated information center for u-service of the old people and disabled. It will contribute to realizing the Ubiquitous-society by promotion of young people's quality of life as well as the eldery and disabled.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.49 no.2
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• pp.1-6
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• 2012

In recent years global climate change of hurricanes and torrential rains are going to significantly, that increase damages to property and human life. The disasters have been several claimed in every field. In future, climate changes blowing are keen to strike released to the world like in several movies. Reducing the damage of long-term weather phenomena are emerging with predicting changes in weather. In this study, it is shown how to predict the red tide phenomenon with multiple linear regression analysis and artificial neural network techniques. The red tide phenomenon causing risk could be reduced by filtering sensor data which are transmitted and forecasted in real time. It could be ubiquitous driven custom marine information service system, and forecasting techniques to use throughout the meteorological disasters to minimize damage.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.1
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• pp.38-53
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• 2007

Nowadays, as it goes on digitalization of the broadcasting and the convergence of the broadcasting and communications , it has been developed into the ubiquitous individual media consuming pattern which can easily and comfortably consume the favorite contents through any devices at anytime and/or anywhere. For this, in this paper, we propose personalized broadcasting service that can provide a convenient access of the contents that users want to watch at anytime by considering the user preference and consumption characteristics as well as an efficient browsing and watching of the particular program segments more advanced than the data broadcasting services. Moreover, it is implemented the TV-Anytime standard based on personalized broadcasting terminal platform by us. The developed services and terminal will used on broadcasting environment in which many services and the contents. The result of that is the broadcasters/service providers and content providers can provide differential broadcasting services which is suitable to each user such as personalized broadcasting service in near future.