• Title/Summary/Keyword: 천수만

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KVLCC2의 천수역에서의 자세변화에 대한 실험적 연구

  • Yun, Geun-Hang;Yeo, Dong-Jin;Park, Byeong-Jae
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.10a
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    • pp.85-87
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    • 2013
  • 깊이가 제한된 천수역을 운항하는 선박의 경우, 선저면의 동유체력변화로 인해 선박의 흘수가 증가하는 스쿼트 현상이 나타난다. 본 연구에서는 KVLCC2선형을 대상으로 H/T(Depth/Draft) = 2.0, 1.5, 1.2의 천수조건에서 모형선의 속도변화, 프로펠러 유무에 따른 모형선박의 상하동요, 종동요 자세변화를 계측하였다. 또한 계측된 모형선의 상하동요변화는 Tuck/Huuska, Barrass 2, Eryuzlu 등의 경험식에 따른 결과와 비교하여 그 유효성을 검증하였다.

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긴급진단 - 국내 AI 발생 현황과 농가지침사항

  • 대한양계협회
    • KOREAN POULTRY JOURNAL
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    • v.46 no.5
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    • pp.106-109
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    • 2014
  • 지난 1월 17일 전북 고창의 종오리 농가에서 HPAI가 발생해 현재('14.04.16)까지 총 34건의 의심신고가 접수 되었으며 이중 28건이 양성판정을 받았다. 4월 16일 기준(잠정집계)으로 총 494농가에서 12,729,000수가 매몰(4월 14일 기준, 원종계(육용) 16천수, 종계 548천수, 육계 3,438천수, 산란계 5,044천수)되었다. 이와관련 금번 AI 발생현황('14.04.16기준)과 농가지침사항에 대해 요약 정리 하였다.

Introduction of Integrated Coastal Management Program and Sustainable Development of Fishing Villages in Cheonsu Bay Region (연안통합관리계획의 도입과 천수만 어촌의 지속가능발전)

  • 김부성
    • Journal of the Korean Geographical Society
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    • v.38 no.2
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    • pp.184-205
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    • 2003
  • Sustainable Development(SD) is an important concept for the future of the coastal area, and for development of fishing villages. Since 1992 UN Conference on Environment and Development in Rio de Janeiro many governments and local authorities throughout the world have been engaged in preparing and implementing $\ulcorner$Agenda 21$\lrcorner$. Many projects which previously would have been identified as environmental protection are now presented under the banner of sustainable development. Integrated Coastal Management (ICM) is an extension of sustainable development. ICM was presented as a framework for resolution of coastal use conflicts. The aim of the present paper is to assess sustainable development potential of fishing villages in Cheonsu Bay Region according to implementation of ICM. Cheonsu Bay Region was known as one of the productive fishing grounds and Cheonsu Bay Region preserved unique characteristics of traditional fishing villages. But this region is now experiencing many changes through the massive reclamation projects like Seosan A B Project. After a brief overview of concepts and history of SD and ICM, the reclamation process and its impacts on both fishery and fishing communities in Cheonsu Bay Region are discussed. According to their changing environmental and socio-economic characteristics after the reclamation, ca 35 representative coastal villages in this region can be classified into 5 types. Many coastal villages shows diversity in their economic activities, as tourism and recreation function becomes more and more important in this region. In present-day Cheonsu Bay Region, it is possible to differentiate fishing village cooperatives(FVO) with high potential of sustainable fishery development, FVOs with medium potential, FVOs with low potential on the basis of 14 selected indicators.

Numerical Modeling of Changes in Tides and Tidal Currents Caused by Embankment at Chonsu Bay (천수만 방조제 건설로 인한 조석현상 변화)

  • 소재귀;정경태;채장원
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.10 no.4
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    • pp.151-164
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    • 1998
  • Changes in tides and tidal currents in Chonsu Bay caused by the construction of Seosan A and B reclamation regions have been investigated using a depth-integrated two-dimensional tidal model. Three water level recorders were deployed for about one month and used for the specification of the open boundary condition. The computed currents were found to be in a good agreement with the measurements at two stations within Chonsu Bay. Comparison of the absolute velocities computed with the conditions before and after the embankment clearly shows that the reduction in tidal current amplitude is evident throughout the bay and the magnitude of the reduction increases to the north. Calculation shows that the embankment has advanced the time of drying at the northern part of the bay by about 51 minutes and has increased the exposure time by about 23 minutes. The high water time has advanced by about 1 hour, lowering the high water level by about 15 cm.

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Calibration and Verification of a Hydrodynamic Model in Chunsu Bay and Adjacent Coastal Water (천수만과 인근연안에서 수역학모델의 보정 및 검증)

  • Kyeong Park;Jeong Hwan Oh
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.10 no.3
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    • pp.109-119
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    • 1998
  • A horizontal tow-dimensional version of POM (Princeton Ocean Model) was modified in representing the bottom friction and the open boundary conditions. To simulate the flooding and drying of intertidal flats, a wetting-and-drying scheme was incorporated into the model. The model then was applied to the Chunsu Bay and its adjacent coastal water. Only the water movement due to tides, the dominant forcing in the study area, was considered. This presents the procedure and the results of model calibration and verification for the Chunsu Bay system. The model was calibrated, using the average tidal characteristics in Tide Tables, for the amplitudes and the phases of tidal waves throughout the modeling domain. Calibration results showed that the model gave a good reproduction of tidal waves. The calibrated model was verified using the time-series measurements of surface elevation and current velocity in the summer of 1995. The model reproduced the tides currents very well. calibration and verification results demonstrated that the model is capable of reproducing the tidal dynamics in the Chunsu Bay system.

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초대형 선박의 선체침하에 관한 연구

  • Hwang, Su-Jin;Im, Nam-Gyun;Lee, Chun-Gi;Lee, Sang-Min
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2016.05a
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    • pp.78-80
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    • 2016
  • 선박이 천수 영역에서 운항할 때, 선저부분의 압력변화로 인하여 흘수가 증가하는 현상이 나타난다. 이 같은 현상을 선체침하(Squat)라 하며, 선박의 조종성능을 변화시켜 해양사고의 발생위험을 높이게 된다. 특히, 초대형 선박의 경우에는 흘수가 커 천수영역에서의 선체침하현상이 더욱 크게 일어난다. 따라서 본 연구에서는 천수 영역에서의 초대형선박의 선체침하정도를 추정하고자 하였다. 이를 위하여, 세 가지 천수조건을 구성하고, 다양한 추정식을 이용하여 초대형선박의 경사각도에 따른 선체 침하의 정도를 계산하였으며, 그 결과를 비교하여 보여주었다.

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The Application Method for restoration of the spring water areas using the Scoria (용천수 주변지역 원형 복원을 위한 송이 활용기법)

  • Ko, Ho-Jun;Ko, Myeong-Jin;Lee, Chang-Hun;Hwang, Ha-Neul;Choe, Na-Yeol;Kim, Nam-Heong
    • Proceedings of the KAIS Fall Conference
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    • 2010.11b
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    • pp.576-578
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    • 2010
  • 현재 제주도의 주 수입원이 관광과 수자원이 되어감에 따라 용천수의 중요성이 부각되고 있다. 그러나 용천수의 관리에 문제가 발생하고 있어 이번 논문에서는 용천수 주변지역 원형 복원을 위한 송이 활용기법을 주제로 삼고 있으며 이번 실험을 통해 용천수 관리의 방안을 제시해 보고자 한다.

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육계농가 청소 및 방역 수준 개선점 많다

  • 대한양계협회
    • KOREAN POULTRY JOURNAL
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    • v.30 no.10 s.348
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    • pp.77-81
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    • 1998
  • 조사는경기, 충남북, 전남북 등지의 총 86개 농가에서 이루어 졌으며 86개 농가를 규모별, 계사별로 분석하여 보면, 농가규모는 3만수 미만이 전체의 $\32%$로 28농가, 3만수에서 5만수 미만이 $\50%$로서 43농가, 5만수 이상이 $\17%$로서 15농가이며, 3만수 미만의 평균사육수수는 2만 2천수, 3만수 이상 5만수 미만은 3만 6천수, 5만수 이상은 6만 1백수로 나타났다. 계사 형태의 유형은 개방계사가 전체의 $\51%$로 44농가, 발효계사가 $\34%$ 29농가, 무창계사 $\15%$ 13농가로 평균사육수수는 개방계사 3만 3천수, 발효계사 3만 5천수, 무창계사 4만 9천수이다. 설문조사 분석은 총 86개 농가에 대한 내용으로 이루어 졌으며 계사별, 규모별에 따른 차이점도 함께 알아보았다.

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Semantic Analysis and Visualization on Mudras of Sahasra-bhuja Aryavalokitesvara Bodhisattva (천수관음의 수인에 나타난 의미 분석과 시각화)

  • Kim, Youngduk;Kim, Kyungdeok
    • The Journal of the Korea Contents Association
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    • v.17 no.5
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    • pp.520-528
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    • 2017
  • In this paper, we analyze semantics on mudras of Sahasra-bhuja Avalokitesvara and implement visual content as its application. The mudras are described in the Odaejineunjib that is a tangible cultural property. The semantics analysis on the mudras are essential for understanding the meaning of the 42 Hands(mudras) that present symbolic difference of hands holding on various items. So, in this paper, we analyze the semantics on the 42 Hands according to 5 parts which are basic classification of Honored Ones on Esoteric Buddhism. We implemented a visual contents showing Avalokitesvara according to semantics on the 42 Hands. And, in the process, we are able to provide the public with easy accessibility on mudras of Sahasra-bhuja Avalokitesvara. Applications of the mudras are as follows; game contents, traditional cultural contents, etc.