• 제목/요약/키워드: AERA

검색결과 102건 처리시간 0.023초

자동 선구조 추출 알고리즘의 개발과 적용사례 (A Development of Enhanced Automatic Lineament Extraction Algorithm and its Application)

  • 최은영;최동석;최현석;임태근;정래철;윤왕중
    • 지구물리와물리탐사
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    • 제6권1호
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    • pp.7-12
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    • 2003
  • 위성영상에 나타나는 선구조는 화소의 명암차에 바탕을 두어 육안판독이나 자동 추출 알고리즘을 이용하여 추출한다. 보통 육안판독은 다양한 보조자료와 연구자의 경험적 지식을 필요로 하기 때문에 더욱 객관적이고 신속한 자동선구조 추출 알고리즘들이 필요하다. 산악지형 외에도 충적층 요소까지 고려하여 개발된 DSTA(dynamic segment tracing algorithm) 알고리즘은 충적층 지역이 산악지형에 대해 비교적 넓은 부분을 차지하고 있는 경우에 충적층 지역에서 노이즈가 나타난다. 본 연구에서는 이러한 노이즈를 감소시킬 수 있는 알고리즘인 AERA(alluvial effect reducing algorithm)를 개발하여 산악지형과 농경지와 도심지역이 넓게 분포되어 있는 지역에 이를 적용하였으며, 기존의 알고리즘만 이용하여 선구조를 추출한 결과와 비교하여 이의 적용 가능성을 알아보았다.

연자방아의 원리를 이용한 다기능 파쇄기 개발 (Development of multi crusher system using the principle of the Yeon-Ja-Bang-A)

  • 조현철;천세영;안태규;양순용
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2004년도 춘계학술대회 논문집
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    • pp.215-218
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    • 2004
  • This paper is about a study of development on multi crusher system. This system use the principle of the Yeon-Ja-Bang-A. This system consists of the power part and the power transmit part, the Yeon-Ja Stone part, the crusher part, an input part, an output part. The advantage of this system decrease about working hours and installation aera.

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Modulation of Oxidative Status by Calorie Restriction in Mini rat

  • Lee, Ji-Hyeon;Kim, Aera;Kim, Ji-Young;Kim, Chul-Hong;Park, Dae-Ui;Han, Suk-Kyu;Shimokawa-Isao;Chung, Hae-Young
    • 대한약학회:학술대회논문집
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    • 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
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    • pp.213.2-214
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    • 2001
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Sensor Network 환경에서 저전력 기반의 적응적 라우팅 알고리즘 연구 (A Study on Adaptive Routing Algorithm for Changing Environment in Sensor Networks)

  • 전재성;양현규;이병호
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2005년도 추계종합학술대회
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    • pp.1043-1048
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    • 2005
  • As sensor network is drawing more attention than ever before due to the development of sensors and the technology of communications, various routing-algorithms, to realize a sensor node with low-power and a miniature size, is being introduced in the field. This paper is to discuss a way to find an optimal path by changing a routing- algorithm adequately according to environmental changes. This is also to suggest an appropriate sensor network model in the ubiquitous aera. The result from the experiment that we conducted showed us that as we suggested, an algorithm, changing and adapting itself to each different environment, operated more stably and transmitted data more effectively than the current fixed one. And it was also confirmed that this type of algorithm can provide low-power management, which is very important in sensor network.

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PAHs의 용해도와 생분해에 미치는 비이온계 계면활성제의 영향 (The Effect of Nonionic Surfactants on the Solubility and Biodegradation of PAHs in Soil Slurry)

  • 박종섭;김인수
    • 한국지하수토양환경학회:학술대회논문집
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    • 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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    • pp.174-177
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    • 1998
  • The effects of surfactants affecting polycyclic Aromatic Hydrocarbon(PAHs) solubility and biodegradation in soil slurry were investigated. The critical micelle concentration(CMC) values of surfactants used in this study were 12.7mg/L(Brij 30), 13.4mg/L(Tween 80), 13.6mg/t(Triton X-100). The solubility of PAH increased as the Hydrophile-Lipophile Balance(HLB) value of surfactant decrease. At surfactant biodegradation and toxicity experiement using respirometer, Brij 30 did not show any toxic effect and substrate inhibition upon the level of 1.5g/L. Also, biodegradation of Brij 30 gave no reduction on the phenanthrene biodegradation rate. When the desorption rate of phenanthrene between sand and clay is compared, lower percentage of phenanthrene was desorbed at clay because of the larger surface aera and higher organic content of clay. At the biodegradation experiments of phenanthrene in soil slurry phase, more than 90% of initial phenanthrene adsorbed onto both sand and clay were biodegraded by phenanthrene- acclimated cultures.

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