• Proceedings of the KIEE Conference
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• 2007.10a
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• pp.87-88
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• 2007

URC(Uniform Resource Identifier) 로봇은 기존의 로봇 자체에서 처리하던 기능을 네트워크를 통하여 외부로 분산시켜 외부의 센싱기능과 프로세싱 기능을 활용하여 효율적으로 구동하기 위한 것이다. 즉 많은 파워가 요구되는 센싱 기능이나 프로세싱 기능을 외부에 있는 서버를 활용하여 서비스를 제공함으로써 간단한 로봇으로도 고도의 서비를 제공이 가능토록하여 가격 경쟁력을 갖도록 하기 위함이다. 본 논문에서는 URC 로봇을 원격에서 모니터링 및 제어가 가능하도록 웹 서비스 기술을 임베디드 시스템 환경에 맞게 최적화하였다. 서비스는 인터넷 기반의 SOAP 프로토콜을 통하여 교환되는 XML 기반 메시지를 통하여 다른 응용 에이전트들과 직접적인 상호작용을 지원함으로서 이기종간 호환 및 표준 플랫폼을 지원할 수 있다. 본 논문에서는 URC 시범서비스 참가 로봇인 네토로(한울로보틱스)에 본 연구결과를 적용하여 기능 및 안정성을 검증하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.7
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• pp.1483-1490
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• 2003

In existent industry spot, device administrators should be ever-ready for monitor and control of devices. Thus, it is inefficient because there are much human strength waste and time loss. To solve these problem, we develop a real time device management system based on wire and wireless internet. If any device brutes down, this system senses breakdown automatically and notify it to device administrators via mobile phones. Then the administrator does emergency measures for breakdown device though wire and wireless internet. For the purpose, we develop each local device control system. device management system, mobile system, and web system.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04a
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• pp.64-66
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• 2003

본 논문은 서버를 구성할 수 있는 방식 중의 하나인 Cold-standby 방식을 이용하여 리눅스를 기반으로 한 고가용의 웹 서버 설계 및 구현에 대해 그 방안을 제시하고자 한다. Cold-standby 방식은 프라이머리 서버와 필요시 그 기능을 대신하는 백업 서버로 구성되며, 서비스를 제공하는 프라이머리 서버에 결함이 발생하여 서비스를 제공할 수 없을 경우 백업 서버가 그 역할을 대신하는 동작 방식이다. 프라이머리 서버에서 백업 서버로의 스위칭은 리눅스에서 오픈 소스로 제공하는 heartbeat 기법을 이용하여 프라이머리 서버의 결함발생시 백업 서버로의 스위칭이 가능하며, 프라이머리 서버의 과중한 트래픽으로 인해 발생할 수 있는 오버헤드를 줄이기 위해 실제 서비스를 처리하는 리얼 서버들을 클러스터링하였다. 또한 mon 기법을 이용하여 리얼 서버들의 상태를 모니터링함으로써 리얼 서버들의 추가 및 삭제가 용이하며, 웹 서버를 위한 하드웨어 및 소프트웨어 기법의 고가용을 제공함으로써 클라이언트에 대하여 안정성 및 신뢰성을 보장한 고가용의 서비스를 제공하는 웹 서버를 구현하였다.

• The KIPS Transactions:PartA
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• v.10A no.5
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• pp.571-578
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• 2003

The appearnace of web technology has accelerated the development of the multimedia technology, the computer communication technology and the multimedia application contents. Researches on WBI(Web-based Instruction) system have combined the technology of the digital library and LOD,. REcently WBI(Web-based Instruction) model which is based on web has been proposed in the part of the new activity model of teaching-learning. As the demand of the customized coursewares from the lwarners is increased, the needs of the efficient and automated education agents in the web-based instruction are recognized. In this paper we propose a system monitors learner's behaviors constantly, evaluates them, and calculates his accomplishment. And the system offers suitable course to learner applying this accomplishment degree to agent's schedules. Therefore, the learner achieves an active and complete learning from the repeated and suitable course semantic-based retrieval.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.5
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• pp.31-37
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• 2018

When an IoT system is constructed, a dashboard is also developed to monitor the values of sensors in the IoT System. Much time and money, however, are spent in developing the dashboard software. This paper presents design and implementation details of a dashboard maker called as YellowPeach, which helps to create a dashboard easily and fast without programming. Using YellowPeach, the user can author a dashboard by putting predefined charts to display values of sensors in it, and store the dashboard as a JSON file. Also an web application has been developed to run the dashboard on the web browser. The dashboard viewer web application connects on MQTT-based IoT system, receives values from the sensors, and displays the values on charts in real-time.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.5B
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• pp.824-832
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• 2010

In construction structure management, the effects of investigation by the professional manager is dependent on the cost, the inspection periods and methods. Therefore, effective and automated maintenance system for the target structure is required. Although some bridge monitoring systems are operating using wire based networks, the performance is not good enough to show sufficient ability as integrated bridge management system. In this paper, we design and implement an integrated bridge management system based on sensor networks. Two expert modules for bridge management and the integrated system management are provided. Moreover, web-based monitoring system is also designed for users at anywhere. The results show that the system is effective and readily available.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1120-1122
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• 2005

인터넷의 급속한 보급으로 인해 데이터 전송 시 발생하는 공간상의 제약을 쉽게 극복 할 수 있게 되어 전 세계 어디서든지 데이터를 주고받을 수 있게 되었다. 이러한 인터넷 웹기반의 장점을 살려서 그동안 실험 연구용으로 사용하던 서보시스템의 PID 제어방법을 인터넷을 기반으로 한 원격제어 시스템으로 구현하였다. 본 논문에서는 DC 서보 모터와 모터 제어 보드, NI사의 DAQ, PC로 시스템을 구현 하였다. UI(User Interface)는 LabVIEW 프로그램을 이용하여 GUI(Graphical User Interface)로 DC 서보 모터의 제어와 작동상태의 모니터링이 용이하도록 하였고, 최적의 PID 이득값을 설정하여 원하는 속도 응답 특성이 양호한 제어를 할 수 있게 하였다. 더 나아가 PID 제어 방법을 원격 실시간의 가상 실습이 가능한 e-Learning에 적용 할 수 있음을 확인하였다.

• Journal of Astronomy and Space Sciences
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• v.21 no.4
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• pp.441-452
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• 2004

Nowcast and forecast based on realtime data are quite essential for space weather monitoring. We have developed the web pages (http://sun.kao.re.kr) of the KAO Space Weather Monitoring system by using ION (IDL on the Net). They display latest solar and geomagnetic data, and present their expected effects on satellite, communications and ground power system. In addition, daily NOAA/SEC prediction reports on the probability of solar X-ray flares, proton events and geomagnetic storms are provided. To predict the arrival times of interplanetary shocks and CMEs, two different types of prediction models are also implemented. A work is in progress to develop web-based database of several solar and geomagnetic activities. These data are automatically downloaded to our data server in every minute, or every day using IDL and FTP programs. In this paper, we will introduce more details on the development of the KAO Space Weather Monitoring system.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.492-496
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• 2002

We present the web-based remote monitoring system using distributed object technology. In order to provide the desired functionality, the system has used CORBA(Common Object Request Architecture) and Java Servlet to implement the integrated distributed object environment. It converts the existing standalone machine monitoring system into web-based machine monitoring system. It consists of applet program, CORBA server and CORBA client. The usefulness of our system will be illustrated by the application to ICM(Integrated Condition Monitoring) System developed by KIST Tribology Center.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.579-580
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• 2017

Recently, as safety accidents by reagents increase in laboratories, systems are being developed to safely manage reagents. The existing system monitoring and manages the reagent through the web page, but the internal environment change of the reagent cabinet is considered or the remote monitoring and control function is insufficient. In order to solve this problem, this paper predicts the deterioration of the reagent loaded in the reagent cabinet. And we propose a system that can monitoring and control remotely. It predicts the deterioration of the reagent through the temperature attached to the inside of the reagent cabinet, the value measured by the humidity sensor and the validity period of the reagent, and sends a alert message to the manager. The manager monitoring and controls the reagent cabinet through the application. By predicting the deterioration of the reagents and remotely managing the reagents cabinet it is thought that safety accidents can be reduced.