• 제목/요약/키워드: red data

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GIS를 이용한 적조의 시-공간적 분포 분석 (The Temporal and Spatial Distribution Analysis of Red Tide using GIS)

  • 정종철
    • Spatial Information Research
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    • 제13권3호
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    • pp.253-260
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    • 2005
  • 본 연구의 목적은 GIS기술을 이용하여 적조의 시공간적인 분포를 분석하는 것이다. 적조에 의해 발생하는 피해는 적조 생물종에 따라 다양하게 나타난다 때문에 적조의 피해를 저감하기 위해서는 시-공간적인 적조 생물종의 분포특성을 파악하는 것이 중요하다. 이러한 관점에서 우리는 최초의 적조발생지역, 공간적 발생빈도, 적조의 이동 등을 분석하였다. 본 연구에서 사용된 공간자료는 적조 속보 보고에 의해 공간분포를 디지타이징하였고, 적조데이터베이스를 구축하기 위해 적조 생물종, 생물 밀도, 수온 등의 다양한 속성자료를 구성하였다. 적조의 시-공간적 분포 특성을 분석하기 위해 다양한 공간분석기법을 적용하였다. 이러한 공간분석 결과로부터 남해에서의 시-공간 적이 적조 공간 정보를 얻을 수 있었다.

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A Comparative Study for Red Tide Detection Methods Using GOCI and MODIS

  • Oh, Seung-Yeol;Jang, Seon-Woong;Park, Won-Gyu;Lee, Jun-Ho;Yoon, Hong-Joo
    • 대한원격탐사학회지
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    • 제29권3호
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    • pp.331-335
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    • 2013
  • This study detected red tide areas using the existing Moderate-Resolution Imaging Spectroradiometer(MODIS) and Geostationary Ocean Color Imager(GOCI), and then compared the results between results of two sensors. The coasts of Jeollanam-do in the South Sea of Korea were set as the study area based on the red tide data which occurred on Aug. 26th, 2012. This study compared the results of sensors to detect red tides by using a satellite. In the results of analyzing MODIS by limiting it as chlorophyll concentration and the sea surface temperature which is considered to have red tides by the existing researches, it was possible to delete considerable amount of errors compared to the case of detecting red tides by using only chlorophyll while still there were differences from the range of red tides actually observed. In the results of GOCI by using empirical algorithm for detecting red tides, currently used by Korea Institute of Ocean Science & Technology(KIOST), it was possible to obtain more detailed results than MODIS. However, there was an area misjudged as red tides due to the influence of clouds. Also both MODIS and GOCI extracted red tides were not actually occurring, which might be because they were not able to perfectly distinguish red tides from turbid water in coastal areas with high turbidity.

적조기상정보 : 기상인자를 활용한 연안 적조예측기술 개발 (Meteorological Information for Red Tide : Technical Development of Red Tide Prediction in the Korean Coastal Areas by Meteorological Factors)

  • 윤홍주
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2005년도 춘계종합학술대회
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    • pp.391-396
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    • 2005
  • 한국 연안 전 해역에 걸쳐서 매년 적조생물이 발생 한다. (1995년부터). 남해 중부 및 동부해역은 상습발생 지역이다 (7, 8월). 기상인자(기온, 수온, 강수량, 일사량, 일조시수, 바람)는 적조형성에 기여하며, 특히 수온 (기온)은 적조발생의 제한 인자로 작용한다. 수온 15$^{\circ}$C가 되는 일을 기점으로 적조발생에 소요되는 시간은 78${\sim}$104일 정도 걸리며, 누적일조시수, 누적수온, 누적강우량의 비교로부터 적조발생 해역을 구분할 수 있다. 즉, 남해중부 및 남해동부 해역은 고밀도 적조발생 해역이며 남해서부 해역, 동해남부 해역은 저밀도 적조발생 해역이다. 동해남부 해역을 제외한 나머지 해역은 수온 24.5${\sim}$25.5$^{\circ}$C의 범위에서 1000mg/l 이상의 밀도를 보이는데, 적조생물이 발생하면 대체로 수산피해를 가져다주는 적조경보의 범주에 든다. 위성원격탐사 기술로부터 우리나라 연근해 적조발생 해역 해황특성과 적조분포 상호간의 관계성으로부터 적조의 머무름과 이동은 냉수대의 발달 및 소멸 그리고 북상난류의 흐름과 밀접한 관계가 있음을 알 수 있었다. 또한 식물성플랑크톤의 농도의 변화를 이용하여 적조분포 해역의 감지가 위성위격탐사 기술로 가능하였다. GIS 기술을 통한 적조정보관리시스템의 구축으로 적조정보를 통한 공간분석이 가능하게 되었다.

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클러터 환경에서 다중센서 정보융합을 통한 유도성능 개선 연구 (A Study of Missile Guidance Performance Enhancement using Multi-sensor Data Fusion in a Cluttered Environment)

  • 한두희;김형원;송택렬
    • 제어로봇시스템학회논문지
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    • 제16권2호
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    • pp.177-187
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    • 2010
  • A MTG (Multimode Tracking and Guidance) system is employed to compensate for the limitations of individual seekers such as RF (Radio frequency) or IIR (Imaging Infra-red) and to improve the overall tracking and guidance performance in jamming, clutter, and adverse weather environments. In the MTG system, tracking filter, data association, and data fusion methods are important elements to maximize the effectiveness of precision homing missile guidance. This paper proposes the formulation of a Kalman filter for the estimation of line-of-sight rate from seeker measurements in missiles guided by proportional navigation. Also, we suggest the HPDA (Highest Probability Data Association) and data fusion methods of the MTG system for target tracking in the adverse environments. Mont-Carlo simulation is employed to evaluate the overall tracking performance and guidance accuracy.

Spectral Sensitization and Photographic Characteristics of 9-Phenyl-3,3'-Bis(3-Sulfopropyl)-4,5,4',5'-Naphthothiazolo Carbocyanine Triethyl Ammonium Salt

  • Kim, Yeoung-Chan
    • 한국응용과학기술학회지
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    • 제20권4호
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    • pp.366-371
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    • 2003
  • In this paper, it was studied about the red-sensitive layer. UV-Vis data of the dye at monomeric and J-state were considered with respect to their performance(contrast, speed, density and fog) in photographic emulsion. The sensitizing effect of the dye is found to be strongly structure-dependent. Naphthctbiazolo carbocyanine dye can be used as red sensitizing dye for the spectral sensitization of photographic emulsion.

A WISE/GALEX View of Red Sequence Galaxies

  • 고종완;황호성;손영종
    • 천문학회보
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    • 제37권1호
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    • pp.37.1-37.1
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    • 2012
  • We present mid-IR (MIR) and near-UV (NUV) properties of red sequence galaxies defined by optical color-magnitude relation. We use the Wide-field Infrared Survey Explorer (WISE) preliminary released data matched with the SDSS DR7/GALEX GR6. The red sequence galaxies with little emission lines show a wide spread of MIR (3.4um-12um) colors, implying a variety of MIR excess emission. We focus on the properties of the red sequence galaxies with MIR excess, comparing the properties of post-starburst galaxies to trace how galaxies migrate to the red sequence.

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알칼리활성화 슬래그-레드머드 흙포장재의 현장 적용평가 (Field Application Assessment of Alkali-Activated Slag-Red Mud Soil Mixed Pavement)

  • 강혜주;황병일;김재환;강석표
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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    • pp.107-108
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    • 2017
  • In this search, by evaluating the field applicability of soil mixed pavement of Red mud is mixed into the soil mixed pavement field applicability, and tries to present the basic data about the site application of recycling of red mud and low carbon construction material to. As a result, the conventional soil concrete organization standards (SPS-KSCICO-001: 2003) meets the criteria for parking lot, making use of red mud, natural color as well as the natural loess is expressed.

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Korean Red Ginseng Tonic Extends Lifespan in D. melanogaster

  • Kim, Man Su
    • Biomolecules & Therapeutics
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    • 제21권3호
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    • pp.241-245
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    • 2013
  • Aging is the single most important risk factor that increases susceptibility to many forms of diseases. As such, much effort has been put forward to elucidate the mechanisms behind the processes of aging and to discover novel compounds that retain anti-aging activities. Korean red ginseng has been used for a variety of medical purposes in eastern countries for several thousands of years. It has been shown that Korean red ginseng affects a number of biological activities including, but not limited to, anti-inflammatory, anti-oxidative and anti-diabetic pathways. However, few studies have been performed to evaluate its anti-aging effects with an in vivo system. Here Drosophila melanogaster as an in vivo model organism demonstrates that Korean red ginseng tonic extends lifespan, increases resistance to starvation stress and prevents weight gain. This data suggest that Korean red ginseng may regulate organisms' metabolism in favor of extending lifespan.

Three Antioxidant Compounds of the Red Alga Liagora farinosa

  • Hannoda, Hala M.;Badr, Jihan M.;Yousef, Diaa T.A.
    • Natural Product Sciences
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    • 제13권2호
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    • pp.140-143
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    • 2007
  • Investigation of the chloroform soluble fraction of the red alga Liagora farinosa, collected from Hurghada at the Red Sea resulted in the isolation of three compounds; a nucleoside (thymidine) and two glycosides (methyl-${\beta}$-D-xylopyranoside and glycerol-2-${\alpha}$-D-glucopyranoside). The structures of the isolated compounds were established on the basis of different spectroscopic techniques as well as comparison with the previously published data. This is the first report for the isolation of the three compounds fron red algae; moreover, the compounds were examined for their antioxidant activity and showed variable activity.

Code Red 웜 전파 패턴 분석을 위한 시뮬레이션 (Simulation for the Propagation Pattern Analysis of Code Red Worm)

  • 강구홍
    • 한국콘텐츠학회논문지
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    • 제6권12호
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    • pp.155-162
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    • 2006
  • Code Red와 같은 인터넷 웜이 얼마나 심각하게 우리들 일상생활에 영향을 미쳤는지 잘 알려져 있다. 오늘날 인터넷의 고속화와 함께 이러한 웜의 피해는 단기간 내에 발생할 것이 자명하다. 따라서 이러한 웜에 대항하기 위해서 웜의 전파 특성을 분석하는 것이 무엇보다 중요하다. 본 논문에서는 컴퓨터 시뮬레이션을 통해 Code Red 웜의 전파 특성을 분석한다. 특히 Code Red웜 감염 호스트 수에 관한 기존 시뮬레이션 연구 결과가 관측된 자료와 매칭되지 않음을 보이고 이를 해결하기 위해 개선된 시뮬레이션 환경을 제시하였다. 또한 웜에 대한 초기 대응과 감염에 따른 대응이 웜의 전파 속도 변화에 어떠한 영향을 미치는지 그 결과를 보였다.

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