• Air Cleaning Technology
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• v.34 no.3
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• pp.28-37
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• 2021

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.8
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• pp.1713-1720
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• 2009

An local area weather condition monitoring system to minimize many disasters from the sudden change of weather condition in local and mountain ales is proposed. Firstly, the comparison of present state of the related monitoring systems and the possibility of realization with some merits are investigated. Moreover, this paper present direction of local area weather condition monitoring system based on integration of wireless sensor network and CDMA network following some case study. The sensor node for wireless sensor network and an interface dongle are fabricated for the system. The stand-alone software in cellular phone is also developed. Through the efficient integration of both networks, the measured weather condition data from sensors can be transmitted to the server or mobile to monitor with high reliability. The proposed monitoring system will guide new type of project in wireless sensor network and support alarm service of the sudden change of weather condition to mobile user from central official regulations.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.9
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• pp.2093-2099
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• 2015

To prevent damage to the cargo, monitoring and remote management for reefer containers is necessary. The currently used remote monitoring service is the Power Cable Transmission(PCT) system, which is recommended by the International Maritime Organization(IMO). However, this system is not widely used because it requires a separate PCT infrastructure and is susceptible to data loss problems. To solve this problem, this study introduces the "IoT-based reefer container management system", The proposed system which is attached to reefer container collects and transmits data on the temperature, status and location of reefer container to middleware using RS-232 communication and WCDMA/GSM communication. Middleware is store the data received in the database and provide information to user in real time through the web and mobile program. At this time, users able to change setting temperature in real time from a distant place through the web program. This study tested by transit about shipment of strawberries to monitor and analyze and check the system's overall effectiveness.

• Korean Journal of Remote Sensing
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• v.38 no.6_3
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• pp.1761-1775
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• 2022

Due to unpredictable climate change, the frequency of occurrence of water-related disasters and the scale of damage are also continuously increasing. In terms of disaster management, it is essential to identify the damaged area in a wide area and monitor for mid-term and long-term forecasting. In the field of water disasters, research on remote sensing technology using Synthetic Aperture Radar (SAR) satellite images for wide-area monitoring is being actively conducted. Time-series analysis for monitoring requires a complex preprocessing process that collects a large amount of images and considers the noisy radar characteristics, and for this, a considerable amount of time is required. With the recent development of cloud computing technology, many platforms capable of performing spatiotemporal analysis using satellite big data have been proposed. Google Earth Engine (GEE)is a representative platform that provides about 600 satellite data for free and enables semi real time space time analysis based on the analysis preparation data of satellite images. Therefore, in this study, immediate water disaster damage detection and mid to long term time series observation studies were conducted using GEE. Through the Otsu technique, which is mainly used for change detection, changes in river width and flood area due to river flooding were confirmed, centered on the torrential rains that occurred in 2020. In addition, in terms of disaster management, the change trend of the time series waterbody from 2018 to 2022 was confirmed. The short processing time through javascript based coding, and the strength of spatiotemporal analysis and result expression, are expected to enable use in the field of water disasters. In addition, it is expected that the field of application will be expanded through connection with various satellite bigdata in the future.

• Journal of Advanced Navigation Technology
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• v.15 no.6
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• pp.1025-1033
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• 2011

This paper presents a realization of a peer-to-peer communication system for a UAV navigational monitoring using a commercial HSDPA(High Speed Download Packet Access) mobile communication device. The realized system consists of a communication server, an air data terminal and multiple ground monitoring devices, where the server transfers navigational data from a UAV to multiple monitoring devices in real-time with commercial HSDPA modem. Through ground and flight tests, data were obtained to observe the realized system. Test results show that, depending on communicational environment, about 300msec delay, congestion and packet-loss between air data terminal and ground monitoring devices. Nevertheless, through high-speed long range test on a ground vehicle and altitude test with a UAV flight, the feasibility of a UAV navigational monitoring system was observed.

• The Journal of Society for e-Business Studies
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• v.13 no.2
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• pp.101-115
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• 2008

Recently in the human society, the crime using small arms has increased. Also, many accidents happen because of incomplete management of chemicals and radiation. Accordingly, it is necessary to manage dangerous objects by tracing the position of dangerous objects and rapidly providing the correct information for them. This paper presents a web-based system for real-time monitoring of dangerous objects using RFID in order to overcome the limitations and problems of current dangerous objects management techniques. In this paper, we define the architecture for web-based dangerous objects monitoring system and the scheme for storing information of a dangerous object in the RFID tag. We also implement the web-based monitoring system and present the execution result of the system. The proposed real-time monitoring system is composed of the dangerous objects monitoring server which manages information of dangerous objects and controls them, the dangerous objects monitoring middleware which is mediator between dangerous objects and the server, the RFID reader which reads information of dangerous objects from RFID tags attached to the objects and the database which stores information, status and position of dangerous object. The proposed system manages diverse dangerous objects such as small arms, radiation and harmful chemicals based on the position of them using RFID, so the user can check dangerous objects when they are checked in and checked out and the user can acquire the real-time position information of them through the system. Furthermore, the user can visually monitor dangerous objects through web browser from any where and at any time because the system is web-based system and it provides graphical user interface.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10c
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• pp.335-338
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• 2006

현재 기업 환경은 점차로 거대화되고 기업들간의 상호운용을 통해 비즈니스 프로세스가 더욱 복잡해지고 있다. 또한 다양한 기업 환경 속에서 비즈니스 프로세스가 정상적으로 수행된다고 보장할 수 없다. 비효율적인 비즈니스 프로세스의 운용과 잘못 수행되는 프로세스는 조직 또는 기업의 관점에서 치명적인 문제가 될 수 있기 때문에 이것을 줄이기 위하여 비즈니스 관리자는 업무의 흐름과 상태를 모니터할 수 있어야 한다. 워크플로우 시스템에서의 모니터링은 다양하게 변화하는 업무 상태를 추적하고 분석하여 효율적인 워크플로우 프로세스의 수행을 유도하는 것이다. 이에 가장 중요한 사항은 즉시로 업무의 상태가 분석되어서 관리자에게 가장 최신의 데이터를 전달하는 것이다. 본 논문에서는 워크플로우 관리 시스템에서 운용되는 비즈니스 프로세스를 실시간적으로 추적할 수 있는 모니터링 도구의 메커니즘을 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.3 no.1
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• pp.75-82
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• 1999

This paper describes the implementation of wireless realtime monitoring system using modified CSMA/CA protocol. This system consists of wireless modem, central monitor, mobile station, DB server, and offer advantage of mobility, reduced installation time, long-term cost savings, and so on. And this system offers patient position pursuit service. Patient position pursuit service must be offered to deal with emergency which can be occured during patient movement. This paper proposes modified CSMA/CA protocol and patient position pursuit algorithm, implements wireless realtime monitoring system using it.

• Information and Communications Magazine
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• v.25 no.8
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• pp.12-19
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• 2008

네트워크 및 전송기술의 발달로 통신망을 이용하여 IPTV와 같은 서비스를 제공하는 것이 가능하게 되었다. IPTV는 기존 방송과 달리 IP 망을 통해 데이터의 송수신이 이루어지므로, 전송에러가 발생할 수 있으며, 이 경우 패킷의 손실 및 지연 등의 이유로 열화가 발생하게 된다. 이러한 열화는 사용자의 체감품질에 영향을 미쳐 IPTV서비스에 대한 사용자의 신뢰도를 저하 시킨다. 본 논문에서는 IPTV서비스에서 체감 품질 보장 및 품질 모니터링에 관한 IPTV국제 표준화 동향 및 규정을 소개하고, IPTV 사용자의 체감품질을 보장하기 위한 방법을 고찰한다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1746-1747
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• 2011

BACnet(Building Automation and Control Network)은 빌딩 자동제어 시스템을 위해 개발된 데이터 통신 프로토콜로 ISO에 의해 국제 표준규격으로 제정되었으며, 지난 20여 년간 미국과 유럽을 중심으로 연구 및 개발이 활발히 진행되고 있다. 그러나 국내의 경우 아직까지 개발사례 및 연구활동이 미비한 실정이다. 이에 본 연구에서는 BACnet MS/TP 프로토콜 기반 네트워크 시스템의 실험적 성능해석을 위한 네트워크 모니터링 시스템의 개발 사례를 소개함으로써 BACnet의 국내 기술보급 및 기술확산에 기여하고자 한다.