• Corrosion Science and Technology
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• 제11권4호
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• pp.135-140
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• 2012

The linear polarization resistance method is one of the widely used techniques for the corrosion rate monitoring in the water circulating systems of plants. The measurement is simple and rapid, so that a continuous on-line monitoring is possible without any shutdown of plants. A 2-electrode polarization corrosion rate measurement system was installed in a laboratory using a data acquisition board and PC. The signal processing parameters were optimized for the accurate corrosion rate measurement, and the polarization resistance was compensated with the solution resistance measured by the high frequency sine wave signal of an output channel. The precision of corrosion rate data was greatly improved by removing the initial noise signals on measuring the polarization resistance.

• 천문학논총
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• 제28권3호
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• pp.65-73
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• 2013

We have developed a data integration system for ground-based space weather facilities in Korea Astronomy and Space Science Institute (KASI). The data integration system is necessary to analyze and use ground-based space weather data efficiently, and consists of a server system and data monitoring systems. The server system consists of servers such as data acquisition server or web server, and storage. The data monitoring systems include data collecting and processing applications and data display monitors. With the data integration system we operate the Space Weather Monitoring Lab (SWML) where real-time space weather data are displayed and our ground-based observing facilities are monitored. We expect that this data integration system will be used for the highly efficient processing and analysis of the current and future space weather data at KASI.

• Bulletin of the Korean Chemical Society
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• 제5권6호
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• pp.253-259
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• 1984

An analytical applicability of the fluorescence detection with an optical multichannel analyzer to organic dyes was studied in this work. Continuous acquisition of spectra was possible with the use of a microcomputer. The maximum acquisition rate of a spetrum with 70-point average was about 3 seconds. Floppy discs were used to store data for later use in processing. Laser induced fluorescence detector in High Performance Liquid Chromatography was chosen for an application. Fluorescein below $10^{-15}g$ was detected satisfactorily using this system. With the help of microcomputer, three dimensional chromatograms of time-wavelength-intensity were obtained.

• 대한원격탐사학회지
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• 제2권1호
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• pp.49-54
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• 1986

This study has been intended to design an optimum meteorological information system appropriate for Korea as a part of 5 year development plan. The 5 year plan was that to set up new direction in order to modernize meteorological data acquisition, processing and information distribution. The detailed research has been led to presentation of optimum meteorological information system of Korea eventually, selecting the computerization of communication as the primary object of modernization. In the study, research concerning effective equipment configuration, data communications internal as wall as external, and the related implementations has been carried out with the approach of system component consideration under system application design. As tile results of the study, integrated network of meterorological data communication was presented including earth quakes, radar, aerologic, marine weather observations and so on.

• Journal of Information Processing Systems
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• 제7권3호
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• pp.425-434
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• 2011

The success of iris recognition depends mainly on two factors: image acquisition and an iris recognition algorithm. In this study, we present a system that considers both factors and focuses on the latter. The proposed algorithm aims to find out the most efficient wavelet family and its coefficients for encoding the iris template of the experiment samples. The algorithm implemented in software performs segmentation, normalization, feature encoding, data storage, and matching. By using the Haar and Biorthogonal wavelet families at various levels feature encoding is performed by decomposing the normalized iris image. The vertical coefficient is encoded into the iris template and is stored in the database. The performance of the system is evaluated by using the number of degrees of freedom, False Reject Rate (FRR), False Accept Rate (FAR), and Equal Error Rate (EER) and the metrics show that the proposed algorithm can be employed for an iris recognition system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2741-2743
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• 2003

This paper simulates analog signal processing program by using Matlab GUI which is one of the application parts of Matlab. It is aimed of the embodiment to observe signal acquired by interfacing AD data converted by signal processing program using a simple Data Acquisition Board with computer through the Matlab GUI program and analyze the capability of Matlab CUI and other various signals-harmonic analysis, generating state of interval harmonic, observation of voltage state.

• 대한의용생체공학회:의공학회지
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• 제21권5호
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• pp.469-475
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• 2000

신경신호의 계측은 신경계의 연구에 필수적인 도구로 최근 반도체미세전극기술 등 수십, 수백개의 채널로부터 신경신호를 기록할 수 있는 방법들이 발달함에 따라 많은 수의 뉴런으로부터 신경 신호를 측정하여 컴퓨터로 그 신호를 처리할 수 있는 시스템의 필요성은 더욱 커지고 있다. 본 연구에서는 최대 16채널의 신경신호를 실시간에 측정하여 기록하고, 저장된 신호로부터 활동전위를 검출하며, 단일 뉴런들로부터의 신호를 분류하여 spike train의 형태로 저장한 뒤 여러 뉴런들간의 상관관계를 분석하기 위한 spike train 해석이 가능한 시스템을 개발하였다. 이 시스템은 보통사양의 PC이외에는 단지 신호획득보드만을 포함하여 다채널미세전극으로부터 뉴런의 신호를 측정, 증폭하여 호스트PC로 전송하고 저장하며 이로부터 활동전위를 검출하여 단일뉴런으로부터의 spike train으로 분류할 수 있다. 또한 저장된 spike train들로부터 신경회로망을 이루는 여러뉴런 들간의 관계를 분석하여 기능들이 시스템에 포함되어있다. 개발된 시스템을 사용하여 개구리 감각 신경의 신호를 실시간에 동시기록하여 활동전위을 검출하고 특징추출방법과 principal component analysis를 이용하여 분류한 뒤 spike train 해석을 수행하였다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2015년도 추계학술발표대회
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• pp.1131-1133
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• 2015

EMS(Energy Management System)는 우리나라 전체 전력 계통을 실시간으로 감시, 제어하고 계통 주파수를 자동으로 조정하여 성능 최적화를 유도하는 시스템으로 전력 계통의 두뇌와 같은 역할을 한다. 본 연구에서는 차세대 EMS(Next Generation Energy Management System: NG-EMS)에서 Enable과 Standby 서버 간 데이터베이스 동기화 기능 개선 개발 기술을 소개한다. EMS는 원방제어감시에 사용되는 SCADA(Supervisory Control And Data Acquisition) 데이터를 포함하여 자동발전, 경제급전 등의 전력 계통을 위해 가공된 데이터를 메모리 데이터베이스에 저장한다. 본 연구에서는 EMS의 메모리 데이터베이스에 저장되어 있는 데이터를 시스템 운영자가 선별을 하여 동기화를 수행할 수 있도록 한다. 또한 동기화 되고 있는 현황을 가시적으로 보임으로써 Enable 서버의 장애 발생 시 Standby 서버로의 대체가 유연하고 안정적이며, 신뢰성을 줄 수 있다.

• 한국정보통신학회논문지
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• 제8권1호
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• pp.96-101
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• 2004

망막 두께 측정은 망막을 3차원으로 촬영하고 고속으로 신호처리를 할 수 있는 시스템을 필요로 한다. 본 논문에서는 망막을 촬영하여 3차원 영상으로 구성하기 위한 촬영장치 및 16채널 고속 영상 획득 시스템 개발내용을 소개한다. 망막에 HeNe 레이저를 투사하여 망막에서 반사되어 돌아오는 레이저의 양을 array photo diode로 감지한 후에 이를 3차원으로 형상화함으로써 망막의 두께를 측정한다. 망막에 레이저를 투사하는 장치, APD 광 센서를 이용한 망막 영상화 장치, 16 채널 실시간 A/D 변환 장치 및 PCI 마스터 인터페이스 장치를 개발하였다.

• Korean Journal of Hydrosciences
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• 제2권
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• pp.99-113
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• 1991

Integrated irrigation management system (IIMS) that is incorporated with a microcomputer-based decision support system (DSS) has been developed and applied to paddy rice irrigation systems management. The system hardwares consist of field data acquisition units, data transmission units, central data processing units, and printing and displaying units. Ridld data to be collected include incremental rainfall, streamflow and reservoir water levels, and water levels at several irrigation canal sections within an irrigation sidtricts. The softwares are to process field data, real-time forecasting, irrigation control data, and decision variables from data-base and simulation model subsystems. And the user-interface subsystems are incorporated to present the water system operators and managers the results from data and model sugsystems. User-friendly menu with animated graphic modules are adopted to help understand irrigation controls for the district. This paper issues the overal descriptions of DSS as applied to Anjuk irrigation district. The details of major model components for the irrigation controls are presented along with real-time data collection systems. The potentials of DSS have been appraised very practical and promising for better irrigation system operation and management.