• Geophysics and Geophysical Exploration
• /
• v.8 no.2
• /
• pp.156-162
• /
• 2005

Particularly in research related to seawater intrusion the change of fluid electrical conductivity is one of major concerns, and effective monitoring can help to optimize a water pumping performance in coastal areas. Special considerations should be given to the mounting of sensors at proper depth during the monitoring design since the vertical distribution of fluid electrical conductivity is sensitive to the characteristics of seawater intrusion zone. This tells us the multi-channel electrical conductivity monitoring is of paramount consequence. It, however, is a rare event when this approach becomes routinely available in that commonly used commercial stand-alone type sensors are very expensive and inadequate for a long term monitoring of electrical conductivity or water level due to their restricted storage and difficulty of real-time control. For this reason, we have developed a real-time monitoring system that could meet these requirements. This system is user friendly, cost-effective, and easy to control measurement parameters - sampling interval, acquisition range, and others. And this devised system has been utilized for the electrical conductivity monitoring in boreholes, Yeonggwang-gun, Korea. Monitoring has been consecutively executed for 24 hours, and the responses of electrical conductivity at some channels have been regularly increased or decreased while pumping up water. It, with well logging data implemented before/after pumping water, verifies that electrical conductivity changes in the specified depths originate from fluid movements through sand layer or permeable fractured rock. Eventually, the multi-channel electrical conductivity monitoring system makes an effective key to secure groundwater resources in coastal areas.

• Proceedings of the Korea Contents Association Conference
• /
• 2015.05a
• /
• pp.25-26
• /
• 2015

The Unattended fire detection system using a wireless communication device is designed in this paper. If a fire occurs in some area, the system can detect and automatically extinguish the fire. The major functions for the system are: Unattended detection system for fire based on wireless communication system and Automatic extinguish device system; Thermal imaging camera and video camera system; Monitoring viewer and map viewer system.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2019.10a
• /
• pp.536-537
• /
• 2019

작물의 생육에 따라 적기에 필요한 양만큼의 양분을 공급해 최고의 생산성을 올릴 수 있는 수경재배는 정보통신기술(ICT)을 융·복합한 스마트 농업 형태로 전환되고 있으나, 기술 발전에도 불구하고 여전히 환경 및 경제성 문제 등 많은 개선점을 가지고 있다. 본 논문에서는 딸기 수경재배지의 환경 데이터 및 생육 데이터를 수집하고, 터치스크린과 스마트폰을 통하여 배양액의 배액량, pH, EC, 온도, 습도를 실시간 및 정한 기간에 따라 모니터링이 가능한 수경재배 소규모 온실을 위한 SBC기반의 모니터링 시스템을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2008.11a
• /
• pp.706-709
• /
• 2008

최근 u-City나 Eco-City와 같이 IT 기술들이 도시 공간에 융합됨으로써 점차 지능형 도시로 발전되고 있고, 도시에 거주하는 사람들은 자신의 주변 상황에 맞게 자연스럽게 필요한 서비스를 제공 받게 될 것이다. 이와 같이 향후 유비쿼터스 도시 운영을 위해서는 다양한 GeoSensor를 도시 전체에 구축하고 계속해서 모니터링 해야 만 한다. 본 논문에서 제안한 룰 기반의 이벤트 처리 기술은 넓은 지역에 걸쳐 구축되어 있는 GeoSensor 네트워크로부터 센서 데이터를 수집하여 도시내에 발생되는 다양한 상황들을 효과적으로 모니터링 할 수 있다.

• The Journal of Engineering Geology
• /
• v.28 no.2
• /
• pp.247-258
• /
• 2018

In the demonstration-scale offshore $CO_2$ storage project, the monitoring team studies geophysical and geochemical monitoring of $CO_2$ injections in the Yeongil Bay, in which a $CO_2$ test injection (about 100t) was performed in January, 2017 and further injections in larger scales are planned for 2018 and 2019. In this study, the development status of the Korea-type Hydro-Geophone OBS (Ocean Bottom Sensor) and the geochemical baseline survey (focused on some anions of sediment pore water) are suggested as the preliminary results of the pre-injection test.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2010.05a
• /
• pp.1686-1690
• /
• 2010

우리나라 면적의 약 67%에 이르는 660만ha의 산림 중 침엽수림은 혼효림을 포함하여 약 74%를 차지해 활엽수림보다 넓게 분포하고 있다. 이와 같이 넓은 산림은 가뭄, 홍수와 같은 수문현상과 관련이 있으며 강우에 따른 유출에의 기여하는 바가 클 뿐만 아니라 강우, 증발산, 침투 유출에 이르는 다양한 수문현상이 복합적으로 나타난다. 특히, 최근 임목밀도의 증가가 오히려 증발산량의 증가, 옆면에 의한 강우 차단량의 증가 등을 발생시켜 가뭄과 홍수 또는 산사태의 원인이 될 수 있으며, 수자원 함양을 저해하는 요소로 작용하고 있다는 우려의 목소리가 나오고 있다. 따라서 산림지역의 증발산과 관련 있는 토양수분의 지속적인 모니터링과 감쇄특성 및 토양수분 환경에 대한 연구는 중요한 요소 연구가 될 수 있다. 봄에서 여름으로 진행되는 시기에는 강우발생에 비해 수목의 생육이 활발하여 증발산에 따른 토양수분 변화 및 감소가 급격하게 일어나며, 여름에는 토양수분의 감소도 뚜렷한 반면, 강우사상도 많이 발생하여 이에 따른 변화폭이 크게 나타난다. 또한, 가을에서 겨울로 진행되는 시기에는 수목의 생육의 둔화와 기온 하강으로 인하여 토양수분 감쇄현상 및 변화가 적게 나타나 토양수분의 변화양상이 계절마다 다르게 나타난다. 이에 토양수분의 감쇄현상을 파악하면 곧 산림지역에서의 증발산량 및 토양수분 소비특성을 파악할 수 있기 때문에, 산림에서 실제 토양수분 모니터링과 이를 통한 시간별, 깊이별 토양수분 변화 및 감쇄현상을 파악하는 것은 중요하다. 따라서 본 연구에서는 침엽수 산림에서의 토층별 월별 토양수분의 감쇄특성을 분석하기 위하여 침엽수림에서 토양수분 장기 모니터링 시스템을 구축하여 시간별, 토층별 토양수분 모니터링을 실시하고, 이를 바탕으로 침엽수림에서의 토양수분 감쇄현상을 분석하였다. 또한 토양수분 데이터 및 기상자료를 활용하여 월별, 기간별 토양수분 감쇄곡선을 산정하고 감쇄상수를 비교하였으며, 감쇄특성에 대하여 비교 분석하였다.

• Journal of the Korea Convergence Society
• /
• v.13 no.4
• /
• pp.137-145
• /
• 2022

The usability evaluation of the remote fluid monitoring device, which was introduced to reduce the work of nurses and increase the efficiency, was performed due to the expansion of the non-face-to-face medical system. Remote fluid monitoring is a fusion of various technologies such as fluid measurement and analysis, error correction technology, and transmission technology. The range of use by users, the information they want to obtain, and the control device, etc. are wide, and the factors that evaluate the product are also diverse. Therefore, it is difficult to improve the product through evaluation. In this study, a quantitative index was developed to help improve the product for commercialization by conducting 20 usability evaluations in three areas of product stability, operability, and satisfaction with the remote sap monitoring system device. It was performed through infrared and load cell-type sap monitoring devices. In terms of stability, there was a difference in installation work such as fixing the pole of the device, and high satisfaction was shown for operability and accuracy. In terms of product satisfaction, the satisfaction of load cell devices was generally high.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.10 no.6
• /
• pp.1082-1087
• /
• 2006

This paper presents a gas turbine data acquisition and monitoring system using a LabVIEW programming. The developed real-time monitoring system entitled a C-Tune DAS Plays an important role to make an analysis of the real-time operation of the gas turbine under maintenance. the LabVIEW based software is divided into three parts according to their original functions; Data acquisition, Data analysis and display, and Data storage. The data acquisition part receives data from a PMS (Plant Management System) server and two cFPs (Compact-Field Point). To verify the validity of the developed system, it is applied to gas turbines in the combined cycle power plant in Korea.

• The KIPS Transactions:PartD
• /
• v.18D no.4
• /
• pp.261-274
• /
• 2011

In recent competitive business environment each enterprise has to be agile and flexible. For these purposes run-time monitoring ofservices provided by an enterprise and early decision making through this becomes core competition of the enterprise. In addition, in order to process various innumerable events which are generated on enterprise systems techniques which make filtering of meaningful data are needed. However, the existing study related with this is nothing but discovering of service faults by monitoring depending upon API of BPEL engine or middleware, or is nothing but processing of simple events based on low-level events. Accordingly, there would be limitations to provide useful business information. In this paper, through situation detection an extended complex event model is presented, which is possible to provide more valuable and useful business information. Concretely, first of all an event processing architecture in an enterprise system is proposed, and event meta-model which is suitable to the proposed architecture is going to be defined. Based on the defined meta-model, It is presented that syntax and semantics of constructs in our event processing language including various and progressive event operators, complex event pattern, key, etc. In addition, an event context mechanism is proposed to analyze more delicate events. Finally, through application studies application possibility of this study would be shown and merits of this event model would be present through comparison with other event model.

• 한국신재생에너지학회:학술대회논문집
• /
• 2010.06a
• /
• pp.183.1-183.1
• /
• 2010

Recently, the increased interest in environmental issues has led to extensive research for development of green energy generation systems. However, only one type of generation system may not be sufficient for stand-alone mode because it cannot cope with the irregularity of weather condition. A hybrid generation system is able to make up for the weakness of each system. In this paper, a stand-alone hybrid wind/PV system is developed that can guarantee the stable energy supply. The system is suitable for power supply under 50W, and a vertical savonius type of blade was designed and applied for the wind generation system.