• 제목/요약/키워드: Local circulation

검색결과 311건 처리시간 0.029초

감쇠중력 모형을 이용한 동해의 순환모델링 (Modeling of Circulation for the East Sea Using Reduced Gravity Models)

  • 최병호
    • 한국해안해양공학회지
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    • 제9권3호
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    • pp.105-114
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    • 1997
  • 바람은 동해의 순환에 기여하는 중요한 외력이다. 1.5층 및 2.5층 감쇠중력 모형을 이용하여 동해의 순환을 시뮬레이션하여 대마난류의 분기, 동해안의 동한난류의 분기, 동한만 및 동해북부에서의 반시계 방향성 순환현상을 기존순환모형도와 비교하였다. 상층과 하층의 양상은 동해의 중앙부를 제외하고는 유사하였는데 극전선이 다음과 같이 서로 다른 두양상을 제시한다. 극전선의 북측의 주양상은 대부분의 계절에 발생하는 3개소의 반시계방향 와동이며 이 와동의 내측연안을 따라서 북한류와 리만한류가 흐른다. 극전선의 남측에서 상하 양층의 해류체계는 겨울과 봄의 상층순환을 제외하고는 시계방향 순환이다. 한국과 러시아 연안을 따라 류속구조는 순압적이나 동해중부는 경압적이다. 바람응력의 계절적 변화와 Ekman 수송(suction/pumping)을 시간변화를 갖는 공간적평균과 공간적변화를 갖는 시간적으로 수정된 바람응력을 부여함으로서 조사하였다. 동해의 서측과 북서측 해역의 반시계방향 와동의 형성에 있어서 바람응력 컬(curl)에 의한 국지적인 Ekman suction/pumping이 중요함을 확인하였다

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보수성 도로 포장재의 증발효율 변화에 의한 중규모 순환장 특성 분석 (The Analysis of Mesoscale Circulations Characteristics Caused by the Evaporation-Efficiency of Water Retention Pavement)

  • 김인수;이순환;김해동;서영찬
    • 한국지구과학회지
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    • 제30권6호
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    • pp.709-720
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    • 2009
  • 보수성 포장재가 지표면 열수지와 중규모 순환장에 미치는 영향을 파악하기 위하여 수치실험과 야외 관측을 실시하였다. 수치실험에 이용된 모형은 LCM(Local Circulation Model)이며, 야외 관측은 대기가 안정되어 날씨가 맑은 2007년 7월 19일 실시되었다. 야외 관측실험에서 보수성 포장재 지표면 온도의 최대치는 1430 LST에서 $41.2^{\circ}C$이고, 보수성 재료가 도포되어 있지 않은 일반 아스팔트보다 $16.1^{\circ}C$ 낮게 관측되었다. 수치실험에서는 증발효율 0.3을 가정한 case BET03에서 관측과 가장 유사한 값을 나타내었다. 이때 현열과 잠열플럭스는 각각 227 와 229 $W/m^2$이다. 수치실험 결과, 보수성 포장재는 낮은 지표면 온도, 혼합고와 관련된 잠열플럭스를 높이는 경향이 나타난다. 보수성 포장재에 의한 잠열플럭스의 불연속은 교외풍과 같은 중규모 순환장의 발달을 강화시키는 역할을 한다.

일제하의 공공도서관에 관한 연구 (Study on the Korean Public Libraries under the period of the Japanese Rule)

  • 김포옥
    • 한국문헌정보학회지
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    • 제6권
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    • pp.137-163
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    • 1979
  • The Purpose of this study is analyzed that (l) How the public Libraries under the Japanese Rule since the end of the Yi-Dynasty were recepted and generated by the people and (2) How they were organiged and managed. (3) Also it examined that how they affected the development of the libraries of today. 1. The following are the analyzed results: Three types of the public Libraries under the Japanese Rule for a period of 36 years engaged busily in colonization were Private's Public Libraries, Local Self-Government's Libraries and the Central Governmental Libraries, and were in order established. 2. They were eatablished by individuals, Confucian School Foundation, Young Men's Clubs, School Associations, Korean brethren residing abroad, or The Press Centering around the Local Self-Governments and the Japanese Government-General. 3. In 1932 of the period of the Japanese Rule, the number of Libraies gained the summit and reached 80 Libraries. The Public Libraries including the Central Governmental Libraries remained in existence until the end of the War had been kept up the functions of the Libraries, but the Private Libraries operated by the Koreans were very small and poor. As a result, most of them were closed up and some Libraries transferred their controls to the public. Until the end of the war, only a little over 10 Private Libraries were Kept up. From the aspects of it's organization system, the most of their libraries replaced their chief librarians with non-professional county-headmen or Local supporters. From the aspect of collections, they wate mainly consists of Japanese books for the proper quidance of the public thought based on the ideology of Japanese Rule to Korea and on the industrial promotion rather than books about Koreanology or Western books. At that time, the Library users were with the jobless men and students as the central figures. And the next ranking by the social position of readers was children, farmers, merchants, industrialists, public servants, miscellaneous and educators. Their reading tendencies laid stress on linguistics and literature, physical sciences and medicine, While the reading trend of military sciences and medicine, while the reading trend of military sciences and engineering were very inactive. This was because the Japanese Government-General had not kept the military collections on file. Besides, they were reluctant to make Korean's learn the professional knowledge and so the main reference materials of technology not provited. Most of the Libraries put practiced in circulation services were very important circulation in withinder of the reading room rather than in outside of the Library building. On the other hand, their circulation services has above came with many limitations. As stated above, the public Libraries' managements and activitives under the period of Japanese Rule were the way and means to achive the colonial and imperialistic purpose of the Japanese Empire.

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회전반 유체실험에서 국지적 외력의 실험적 모의 (Experimental Simulation of Local External Forcing of the Contained Rotating Flow)

  • 이창원;나정열
    • 한국해양학회지:바다
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    • 제5권2호
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    • pp.77-85
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    • 2000
  • 회전반 유체실험을 이용하여 국지적 외력에 의한 순환특성을 모의하는 방법을 고찰하였다. 기존의 실험들은 균일한 외력에 의한 순환특성을 고려하였으나 한국 동해를 고려할 때 바람응력 컬의 남북 방향으로의 분포특성 및 해수면 열 손실의 북부해역에서의 존재를 근거로 공간적인 국지성 및 계절 변화를 염두에 둔 주기성을 복합적으로 모의할 수 있는 방법과 실험을 실시하였다. 바람응력 컬의 국지성은 에크만 층내 압력 경도력을 발생시켜 내부에도 같은 압력 경도력이 전달되어 지형류가 발생되게 하였으며 해수면 냉각을 위해서는 용기의 측면을 국지적으로 냉각시켜 자유표면을 유지할 수 있는 방법을 제시하였다. 남북에 위치한 두 개의 서로 다른 방향을 갖는 폐쇄순환과 서안경계류의 크기 및 이안 위치 변화등을 냉각효과 첨부시 및 응력 컬의 주기성을 갖는 경우를 택하여 실험적으로 관찰하였다.

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국지순환과 대기오염물질의 장거리 수송에 관한 연구 (A Study for Long-Range Transport of Air Pollutants Related to the Local Circulation)

  • 이화운;김유근;정우식
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 2000년도 춘계학술대회 논문집
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    • pp.187-190
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    • 2000
  • 대기오염물질의 장거리 수송과 관련해서는 다음의 두 가지 과정이 지배적으로 나타난다. 하나는 종관바람장에 의해 먼 거리를 이동하는 과정을 들 수가 있고(Cox et at. 1975, Apling et al. 1977) 다른 한가지는 열적으로 형성된 국지순환계에 의해 수송되는 과정을 들 수 있다. (Kurita and Ueda 1990) 이러한 과정 중에서 대기오염물의 고농도에 의한 피해가 부각되는 것은 후자라고 할 수 있다 이는 고농도의 대기오염문제는 종관장의 영향이 적어서 오염물의 확산이 부진한 날에 나타나기 때문이다. (중략)

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국가균형발전 5개년계획의 추진전략과 주요내용 - 국토구조구축과 건설산업의 SOC투자를 중심으로 - (The Main Contents of the )

  • 정무용
    • 기술사
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    • 제38권1호
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    • pp.35-43
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    • 2005
  • What are main contents of Balanced National Development Five Years Plan? We will study for contents and policies of the plan's six themes. Six themes of the plan are the drive strategy, the rearing of the worldwide progressive cluster, the local promotion in the strategic industry, the formation of the square national circulation road network, the consolidation of the metropolitan area and the independent drop-out region, and the fund and raising plan. And especially, we will study the details of the national land-structure network formation.

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중규모 국지순환에서 이산화황의 농도예측에 관한 연구 (A Study on the Prediction of SO2 Concentration in local Circulation of Mesoscale)

  • 이화운;김유근;장은숙
    • 한국환경과학회지
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    • 제5권3호
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    • pp.277-284
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    • 1996
  • The Characteristics of atmospheric flow and dispersion of air pollutants in the mountainous coastal area were studied using two-dimensional model by the combination of land-sea breezes and transport. The pollutants emitted into the simulated wind field in considering with the mesoscale local circulations. The typical effects of land-sea breezes and tophography of coastal area on the dispersion are discussed in detail, and the model is proved as an useful tool to pridict real time pollutant transport by the results of application studies in Pusan, Korea where the urbanized coastal area with mountainous topography. It was found that sulfur dioxide ($SO_2$) are differently transported and concentrated as going inland by the influence of the sea breeze with topographic changes. Key words : land-sea breezes, sulfur dioxide, dispersion, coastal area.

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국지풍모델을 이용한 광양만권의 이류확산 수치모의 (Numerical Simulation of Advection and Diffusion using the Local Wind Model in Kwangyang Bay, Korea)

  • 이상득;김인기
    • 한국대기환경학회지
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    • 제18권1호
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    • pp.1-10
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    • 2002
  • A three-dimensional numerical model which involved the nesting method was developed to reproduce the wind circulation of Kwangyang Bay area which comprises complicated mountains and sea topograph. The calculated results indicated geographical effects of Kwangyang Bay area, sea/land breezes and mount-valley wind which are local circular winds. We also noticed that the northern inland area of Kwangyang Bay formed the very complex wind systems under the influence of such geographic effects when a land breeze was not formed. A good agreement was found between predicted and observed values of temperature. In addition, the calculated results of the wind direction and the wind velocity are in accord with the observed values. They showed only a slight difference in between predicted and the observed values, when the sea breeze and the land breeze are changing.

순위형 로짓모형을 이용한 농업인의 혁신네트워크 연계 특성 (Interconnected Characteristics of Innovation Networks of Farmers Employing Ranked Logit Model)

  • 최상호;이성우;최영찬
    • 농촌계획
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    • 제13권4호
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    • pp.53-67
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    • 2007
  • This study analyzed the probability that experiment stations, agricultural technology and extension centers, provincial agricultural research and extension services, central government organs, or civilian and other related organs will be the first choice of the compositional subjects of local innovation networks. While gender effect was statistically insignificant, educational level, income, main acquired information, sources of necessary information, and frequency of information acquisition sessions were significant, and the preference ranking model was highly relevant. According to the analysis, highly academic and business-related information was most likely to be acquired from the civilian sector; agricultural technology such as technology, crops/plants, storage, and circulation was most likely to be acquired from experiment stations and provincial agricultural research and extension services; and information on agricultural production was most likely to be acquired from agricultural technology centers.

지역문화시설의 지체장애인 동선계획에 관한 연구 - 광주지역 문화시설을 중심으로 - (A Study on Circulation planning of the disabled in Local Cultural arts center)

  • 이수용;박동준;오세규
    • 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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    • 제11권2호
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    • pp.73-81
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    • 2005
  • The disabled has remarkable difficulties to participate social activities and those, that block them up from access to public facilities and the comfortable habitation so they should get help from others, are mainly made by architectural facts. Buildings without impediment which consider the disabled would be the things responding to the needs of the times. If the disabled would be convenient to use facilities, there should be no difficulties to normal people. A first began to examine into the role of the architecture. And to establish radical standards for the disabled to use cultural and assembly facilities through scrutinizing facilities to get access for the disabled and movement circulations in the cultural facilities should be the conclusion. This study which is a kind of fundamental study to construct cultural facilities without obstacles for the disabled began from consideration for the problem flow line of the disabled in cultural facilities and analyzed flow lines for them to use, access, and evacuate from those which are main facilities in the region. Though, evacuation rules in cultural and assembly facilities are recommendatory in existing laws for convenience of the disabled, the congestion of the crowd coming out after performances impedes safe flows of both the disabled and crowds. Further, in case of evacuation, there would be more serious problems. Therefore, consideration of reinforcement for existing laws for convenience of the disabled is needed.

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