• Title/Summary/Keyword: Event Monitoring

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Development of Drought Monitoring System: II. Quantitative Drought Monitoring and Drought Outlook Methodology (가뭄모니터링 시스템 구축: II. 정량적 가뭄 모니터링 및 가뭄전망기법 개발)

  • Lee Joo-Heon;Jeong Sang-Man;Kim Jea-Han;Ko Yang-Soo
    • Journal of Korea Water Resources Association
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    • v.39 no.9 s.170
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    • pp.801-812
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    • 2006
  • In this study, Combined Drought Index which can monitor the drought severity and intensity has been developed using PDSI, SPI and MSWSI. To verify the accuracy and applicability of combined drought index, Drought map of Korea using the combined drought index has compared with past drought event. Drought map using the combined drought index shows good accordance with past drought event and accurate quantitative drought monitoring results. Also the drought outlook technique has been developed using the weather forecast data of Korea Meteorological Administration (KMA). Drought outlook technique of this study can be used effectively as a primitive stage tool for real time drought forecast. As a result of this study, Integrated drought monitoring system has been developed which has capabilities of producing and generating the drought monitoring map and drought outlook map as well as various kinds of drought related information.

The Design of Proxy for CORBA Traffic Monitoring Using OSI management technology (OSI 관리 기술을 이용한 CORBA 트래픽 모니터링 프록시 설계)

  • 박재성;송왕철
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.3 no.2
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    • pp.355-362
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    • 1999
  • Traffic monitoring, a part of the system management, is a vital function lot the proper operation of a system in use. Currently OMG has been trying to standardize CORBA system management. Besides, many companies and research laboratories have been developing and studying CORBA system management. In this paper, we have designed the proxy to monitor the CORBA traffic using the OSI management technology. To manage CORBA traffic resources, 6 parameters have been made into managed objects. The monitoring system consists of a CORBA server, a proxy object and an MIB. The CORBA server is made up of a service provider, a proxy server, and a event sewer. The proxy object acts as a process of a CORBA object, and is made up of a proxy client, a event client, and an IPC server.

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Evaluation of CDMA Network Based Wireless 3 Channel ECG Monitoring System (CDMA망 기반 3채널 심전도 모니터링 시스템의 평가)

  • Hong, Joo-Hyun;Cha, Eun-Jong;Lee, Tae-Soo
    • Journal of Biomedical Engineering Research
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    • v.29 no.4
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    • pp.295-301
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    • 2008
  • A wireless 3 channel ECG monitoring system was developed so that it could monitor the health and movement state during subject's daily life. The developed system consists of a wireless biomedical signal acquisition device, a personal healthcare server, and a remote medical server. Three experiments were performed to evaluate the accuracy, reliability and operability, applicability during daily life of the developed device. First, ECG signals were measured using the developed device and commercial reference device during sitting and marking time and compared to verify the accuracy of R-R intervals. Second, the reliable data transmission to remote server was verified on two types of simulated emergency event using patient simulator. Third, during five types of motion in daily life, the accuracy of data transmission to remote server using CDMA network was verified on two types of event occurring. By acquiring and comparing subject's biomedical signal and motion signal, the accuracy, reliability and operability, applicability during daily life of the developed device were verified. In addition, PDA-phone based wireless system enabled subject to be monitored without any constraints. Therefore, the developed system is expected to be applicable for monitoring the aged and chronic diseased people and giving first-aid in emergency.

The Establishment Plan of Strong-Motion Instrumentation of Dams for Monitoring of Seismic Behavior and Taking An Urgent Countermeasure (댐의 지진관측 및 내진대책 수립을 위한 지진계측시스템 구축 방안에 관한 연구)

  • Oh, Byung-Hyun;Lee, Jong-Wook
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.1588-1595
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    • 2005
  • In this study, the installation location of accelerometer and accelerograph for dam are investigated in the field to establish of emergency action against dam failure when earthquake occur and to guarantee the results of seismic stability of dams which are analysed with dynamic analysis method during 1999 to 2003 by KOWACO. By a comparative study concerning of domestic and foreign guidelines of seismic strong motion instrumentation for dams, "Guidelines of Seismic Strong-Motion Instrumentation Installation, Operation and Maintenance for Dams" is established to set up the standard of seismic strong-motion instrumentation for dam, are supervised by KOWACO There is some problems in taking a measure of stability of dams when earthquake event occur because the existing seismic strong motion instruments are operated independently. This make difficult to confirm the occurrence of seismic event. For that reason, in this study the plan of unified operation and maintenance system for strong-motion instrument for dams is designed. It will make possible real-time seismic monitoring, data transmission and receiving, giving warning for earthquake, and exchanging data with national seismic network.

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Performance Evaluation of Node.js for Web Service Gateway in IoT Remote Monitoring Applications

  • Nkenyereye, Lionel;Jang, Jong-Wook
    • International Journal of Advanced Culture Technology
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    • v.4 no.3
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    • pp.13-19
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    • 2016
  • The growth of mobile devices in Internet of Things (IoT) leads to a number of remote and controlling system related IoT applications. For instance, home automation controlling system uses client system such web apps on smartphone or web service to access the home server by sending control commands. The home server receives the command, then controls for instance the light system. The web service gateway responsible for handling clients' requests attests an internet latency when an increasing number of end users requests submit toward it. Therefore, this web service gateway fails to detect several commands, slows down predefined actions which should be performed without human intervention. In this paper, we investigate the performance of a web server-side platgorm based event-driven, non-blocking approach called Node.js against traditional thread-based server side approach to handle a large number of client requests simultaneously for remote and controlling system in IoT remote monitoring applications. The Node.JS is 40% faster than the traditional web server side features thread-based approach. The use of Node.js server-side handles a large number of clients' requests, then therefore, reduces delay in performing predefined actions automatically in IoT environment.

Real-Time Attack Detection System Using Event-Based Runtime Monitoring in ROS 2 (ROS 2의 이벤트 기반 런타임 모니터링을 활용한 실시간 공격 탐지 시스템)

  • Kang, Jeonghwan;Seo, Minseong;Park, Jaeyeol;Kwon, Donghyun
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.32 no.6
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    • pp.1091-1102
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    • 2022
  • Robotic systems have developed very rapidly over the past decade. Robot Operating System is an open source-based software framework for the efficient development of robot operating systems and applications, and is widely used in various research and industrial fields. ROS applications may contain various vulnerabilities. Various studies have been conducted to monitor the excution of these ROS applications at runtime. In this study, we propose a real-time attack detection system using event-based runtime monitoring in ROS 2. Our attack detection system extends tracetools of ros2_tracing to instrument events into core libraries of ROS 2 middleware layer and monitors the events during runtime to detect attacks on the application layer through out-of-order execution of the APIs.

A Study on The Complex Event Detection Methods Based on Bitmap Index for Stream data Processing (스트림 데이터 처리를 위한 비트맵 인덱스 기반 복합 이벤트 검출 기법에 관한 연구)

  • Park, Yong-Min;Oh, Young-Hwan
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.48 no.4
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    • pp.61-68
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    • 2011
  • Event-based service technology integrate service to detect events that occur in real time by analyzing the response. Is the core technology for real-time business and ubiquitous service environment construction. Is required event-based service technology on business processes in real-time business environment that providing rapid response to changing and custom service using a variety of information real-time monitoring and analysis in ubiquitous service environment. Last event-driven business processes can be used as a CEP(Complex Event Processing). The core of CEP technology, the event from multiple event sources analysis of events affecting and the way to handle action, is detect complex event to user. In previous studies, an event occurs that continue to perform without the need for partial operations. so many operations and spend a lot of memory is a problem. To solve these problems, event detection technique is proposed that large streams of data without processing any events, registered to configure a complex event occurs when all events in the application layer, complex event processing. The proposed method, first using a bitmap index to manage the event occurs. The complex events of the last event in response to define a trigger event. The occurrence of an event to display a bitmap index, a composite event occurrence of all event to configure the test through the point at which a trigger event occurs. Is proposed, If any event occurs to perform the operation. The proposed scheme perform operations when all event occurs without events having to perform each of the tests. As a result, avoid unnecessary operations and reducing the number of events to handle the increased efficiency of operations.

Implementation of an Agent-centric Planning of Complex Events as Objects of Pedagogical Experiences in Virtual World

  • Park, Jong Hee
    • International Journal of Contents
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    • v.12 no.1
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    • pp.25-43
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    • 2016
  • An agent-centric event planning method is proposed for providing pedagogical experiences in an immersed environment. Two-level planning is required at in a macro-level (i.e., inter-event level) and an intra-event level to provide realistic experiences with the objective of learning declarative knowledge. The inter-event (horizontal) planning is based on search, while intra-event (vertical) planning is based on hierarchical decomposition. The horizontal search is dictated by several realistic types of association between events besides the conventional causality. The resulting schematic plan is further augmented by conditions associated with those agents cast into the roles of the events identified in the plan. Rather than following a main story plot, all the events potentially relevant to accomplishing an initial goal are derived in the final result of our planning. These derived events may progress concurrently or digress toward a new main goal replacing the current goal or event, and the plan could be merged or fragmented according to their respective lead agents' intentions and other conditions. The macro-level coherence across interconnected events is established via their common background world existing a priori. As the pivotal source of event concurrency and intricacy, agents are modeled to not only be autonomous but also independent, i.e., entities with their own beliefs and goals (and subsequent plans) in their respective parts of the world. Additional problems our method addresses for augmenting pedagogical experiences include casting of agents into roles based on their availability, subcontracting of subsidiary events, and failure of multi-agent event entailing fragmentation of a plan. The described planning method was demonstrated by monitoring implementation.

Basic Monitoring Concept for Revised Unit Load on NPS (비점오염원 원단위 개정을 위한 조사연구 방향)

  • Shin, Dongseok
    • Journal of Korean Society on Water Environment
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    • v.23 no.4
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    • pp.429-433
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    • 2007
  • Many researchers have made a study of NPS unit-loads and the scientific evaluation method which need for formulating and enforcing a Total Maximum Daily Load (TMDL) management system and modifying a pollutant discharge loadings function. Some showed the event mean concentration (EMC) on single land-use. For the most parts, as the results showed on multiple land-uses, those cannot be used for NPS unit-loads calculation. NPS runoff shows various phenomena depending on rainfall monitoring data, therefore sampling methods and frequency for NPS monitoring must be different from the general monitoring for water quality trend assessment.

Power Quality Monitoring System with a New Distributed Monitoring Structure

  • Won, Dong-Jun;Chung, Il-Yop;Kim, Joong-Moon;Ahn, Seon-Ju;Moon, Seung-Il;Seo, Jang-Cheol;Choe, Jong-Woong
    • KIEE International Transactions on Power Engineering
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    • v.4A no.4
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    • pp.214-220
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    • 2004
  • Power quality monitoring is the cornerstone for power quality analysis, diagnosis and improvement. The measurement of power quality (PQ) evolves from instantaneous metering to continuous monitoring. Furthermore, recent technologies enable us to construct more flexible, reliable, rapid and economical power quality monitoring system (PQMS). Therefore, this paper presents an improved PQMS with a new distributed monitoring structure. The proposed PQMS consists of a PQ meter, PQ analyzer and GUI. The PQ meter only collects raw data and the PQ analyzer performs power quality analysis. It has several advantages compared to conventional structures in economic efficiency, modularity, speed, etc. PQ monitoring algorithms to catch steady-state trends and to detect PQ events are also adapted to the proposed structure. Using the proposed structure and monitoring algorithm, a prototype PQMS is constructed and real-time testing is performed.