• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.479-482
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• 2006

The absorption coefficient and backscattering properties of phytoplankton were calculated from the Mie theory. Given a simple case that phytoplankton and mineral particles are the only constitutions in seawater, the reflectance $b_b({\lambda})/[a({\lambda})+b_b({\lambda})]$was analyzed. Then the chlorophyll concentrations were estimated from remote sensing OC2 algorithm. The results show that reflectance in short wavelength region is more sensitive to the Chl variation; High mineral concentrations in seawater have significant influence on the reflectance spectrum; the existence of high mineral concentration may result in the mistake in chlorophyll estimation from OC2 algorithm.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (D)
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• pp.56-58
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• 2006

Sensing and coverage are the two relevant tasks for a sensor network. Quality of sensor network totally depends upon the sensing ability of sensors. In a certain monitored region success of detecting or sensing an object with the help of sensor network tells that how efficiently the network coverage perform. Here in this paper we have proposed a clustering algorithm for the deployment of sensors and thus calculated the object detection probability. Actually by this work we can easily identify the present network coverage status and accordingly can take action for its improvement.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1298-1300
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• 2003

Based on the Leaf Area Index (LAI) data derived from remote sensing information and eco-climate data, the responses of regional ecosystem variations in seasonal and interannual scales to the East Asian monsoon are studied in this paper. It is found that the vegetation ecosystems of eastern China are remarkably correlated with the East Asian monsoon in seasonal and interannual scales. In the seasonal timescale, the obvious variations of the vegetation ecosystems occur with the development of the East Asian monsoon from the south in the spring to the north in the autumn. In the interannual scale, high LAI appears in the strong East Asian monsoon year, whereas low LAI is related to the weak East Asian monsoon year. These further lead to the characteristic of 'onsoon-driven ecosystem' in the eastern China monsoon region, which can be revealed by LAI.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.741-743
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• 2003

This study focuses on monitoring the surface UHI in a tropical city of Bangkok in both spatial and temporal dimensions based on MODIS- and TM -derived land surface temperature (LST). The spatial extension and magnitude of the surface UHI are explored for days and nights as well as its variations through the dry (least-clouded) season. Surface UHI growth between 1993 and 2002 is mapped using highresolution LANDSAT TM thermal bands. UHI patterns are, then, analyzed in association with land/vegetation covers derived from high-resolution ETM+ and ASTER satellites and ancillary data.

• 대한원격탐사학회지
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• 제6권1호
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• pp.39-47
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• 1990

The first Marine Observation Satellite(MOS) was launched by National Space Development Agency of Japan on February 19, 1987, and it is equipped with three sensons covering visible, infrared, and microwave region. One of them is Visible and Thermal Infrared Radiometer(VTIR) whose main objective is to detect the Sea Surface Temperature(SST). The objective of this study was to process the MOS data using Cray-2 supercomputer, and to assess the SST in the Yellow Sea. In order to implement this objective, the linear regression model between the ground truth data and the corresponding digital number of VTIR in MOS was used to establish the relationship. After testing the significance of the regression model, the SST map of the whole Yellow Sea was derived based on the model. The digital SST map representing the study area showed certain pattern about the SST of Yellow Sea in March and April. In conclusion, the VTIR data in MOS is also useful in investigating SST which provides the information about the Yellow Sea water current in the spring.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.285-289
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• 1999

A processing system to produce cloud-free composite image data set was developed. In the process, a fine geometric correction based on orbit parameters and ground control points and radiometric correction based on 6S code are applied. Presently, by using AVHRR image data received at Tokyo, Okinawa, Ulaanbaatar and Bangkok, data set of 10 days composite images covering almost whole Asian region.

• 한국GIS학회:학술대회논문집
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• 한국GIS학회 2003년도 공동 춘계학술대회 논문집
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• pp.297-299
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• 2003

Altimeter(Topex/Poseidon) and AVHRR(NOAA) data were used to study the variations and correlations of Sea Level(SL) and Sea Surface Temperature (SST) in the North East Asian Seas from November 1993 to May 1998. This region is influenced simultaneously to continental and oceanic climate as the border of the East Sea(Japan Sea). SL and SST have increased gradually every year because the global warming, and presented usually a strong annual variations in Kuroshio extension region with the influence of bottom topography.

• Journal of information and communication convergence engineering
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• 제1권1호
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• pp.58-60
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• 2003

Altimeter(Topex/Poseidon) and AVHRR(NOAA) data were used to study the variations and correlations of Sea Level(SL) and Sea Surface Temperature (SST) in the North East Asian Seas from November 1993 to May 1998. This region is influenced simultaneously to continental and oceanic climate. SL and SST have increased gradually every year because the global warming, and presented usually a strong annual variations in Kuroshio extension region with the influence of bottom topography.

• 한국자기학회지
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• 제26권2호
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• pp.62-66
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• 2016

포탄에 묻혀있는 탐지코일에서 유도되는 전압으로부터 총구를 떠나는 포탄의 초기속도를 계산하기 위하여 링 형태의 자석, 요크 및 탐지코일로 모델을 구성하였다. 자기장 해석에 의해 탐지코일의 유도전압에서 구한 마스터 곡선으로부터 포탄의 초기속도를 구할 수 있다. 탐지코일의 유도전압은 포탄에 묻혀있는 탐지코일 직경의 크기에 영향을 받는데, 직경의 크기가 증가하면 유도전압도 비례하여 증가한다. 탐지코일에서 유도되는 전압의 직경 효과를 감안한 초기속도 변화에 대한 정보를 입력하면 목표에서 포탄이 정확하게 폭발할 수 있다.

• 한국통신학회논문지
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• 제35권1A호
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• pp.87-94
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• 2010

협력 스펙트럼 감지(cooperative spectrum sensing) 방식은 지역적으로 분산되어 있는 다수의 부 사용자들이 협력하여 스펙트럼 감지를 수행하는 방법으로, 페이딩으로 인한 검파 성능의 손실을 효과적으로 줄일 수 있는 것으로 알려져 있다. 지금까지 협력 스펙트럼 감지에 관해 발표된 대부분의 연구 결과들은 부 사용자들의 스펙트럼 감지 결정이 통계적으로 서로 독립이라는 가정에 기초한 것이다. 그러나 실제 환경에서는 음영 효과(shadowing effect)로 인해 서로 가까이에 위치한 부 사용자들의 감지 결정(decision)들은 상관 관계(correlation)를 가질 수 있다. 이런 요인이 협력 스펙트럼 감지 방식의 성능에 미치는 영향을 평가하기 위하여, 본 논문에서는 주 사용자(primary user)가 활동할 때는 서로 다른 부 사용자 2명의 스펙트럼 감지 결정 사이에 일정한 통계적 상관도(correlation)가 존재하고, 활동하지 않는 경우에는 통계적으로 독립인 것으로 CR 시스템 환경을 설정한 후, 통계적 상관도에 따라 전송 용량(throughput)이 어떻게 변화하는 지를 분석하였다. 분석 결과 부 사용자들의 스펙트럼 감지 결정 사이의 상관 계수가 커질수록 OR 융합 규칙을 사용하는 경우에는 전송 용량이 줄어들은 반면 AND 융합 규칙을 사용하는 경우는 전송 용량이 증가하는 것으로 나타났다.