• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.1927-1932
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• 2004

A 1/21.6 scaled non-heating experimental facility was prepared utilizing the results of a scaling analysis to simulate the APR1400 reactor and insulation system. The behaviors of the air bubble-induced two-phase natural circulation flow in the insulation gap were observed, and the liquid mass flow rates driven by natural circulation loop were measured by varying the injected air flow rate and distribution. As the injected air flow rates increased, the natural circulation flow rates also increased. Both the longitudinal and the latitudinal distributions of the injected air affected the natural circulation flow rates, especially, the longitudinal effect is more larger.

• 한국환경과학회지
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• 제8권5호
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• pp.555-558
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• 1999

A sea/land breeze circulation system and a regional scale circulation system are formed at a region which has complex terrain around coastal area and affect to the dispersion and advection of air pollutants. Therefore, it is important that atmospheric circulation model should be well designed for the simulation of regional dispersion of air pollutants. For this, Local Circulation Model, LCM which has an ability of high resolution is used. To verify the propriety of a LCM, we compared the simulation result of LCM with an exact solution of a linear theory over a simple topography. Since they presented almost the same value and pattern of a vertical velocity at the level of 1 km, we had a reliance of a LCM. For the prediction of dispersion and advection of air pollutants, the wind filed should be calculated with high accuracy. A numerical simulation using LCM will provide more accurate results over a complex terrain around coastal area.

• 교육시설
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• 제15권6호
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• pp.12-21
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• 2008

The purpose of this study was to research on relationship between the circulation system of students and resident users in elementary school complex. 4 elementary schools in Seoul were chosen for this study. The method of this study is a plan analysis, an on-the-spot survey, and user behavior observation. The circulation system of students and resident users at school zone(outside) and Community school were observed. The following is the main results of this study. First, circulation systems are mixed between public zone and student zone in Community school. Therefore these zones shall be planed separated. Second, resident users tend to go directly to the facilities gathered together. Therefore main entrance has to be located closely to the facilities gathered together. In accordance with this results, both the main entrance of Community school and the students facilities have to be considered when planing the circulation system in school from now on.

• 수완나부미
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• 제16권1호
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• pp.81-101
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• 2024

This paper examines the complexities and creative opportunities brought about by the transnational circulation of texts specifically in the areas of transmission, consumption, and adaptation. The circulation of texts and along with it creative elements such as generic forms, tropes, and frameworks for consumption form an integral part in the production and advancement of any form of popular culture. In the process of such circulation, adaptation becomes a form of social and political process necessary for domestic palatability. In this paper, I examine how these complexities can be illustrated in the circulation of one emerging popular form in East and Southeast Asia: Boys Love (BL) television and web series. Using the transnational movement of the BL genre from South Korea, Thailand, and the Philippines, I examine how the circulation and adaptations are inflected by considerations related to regional geopolitics and domestic issues concerned with the creative praxis of representing gender and sexuality.

• Ocean and Polar Research
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• 제35권3호
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• pp.259-272
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• 2013

One of the factors influencing the climate around Korea is the oceanic-atmospheric variability in the tropical region between the eastern Indian and the western Pacific Oceans. Lack of knowledge about the air-sea interaction in the tropical Indo-Pacific region continues to make it problematic forecasting the ocean climate in the East Asia. The 'Tropical Indo-Pacific water transport and ecosystem monitoring EXperiment (TIPEX)' is a program for monitoring the ocean circulation variability between Pacific and Indian Oceans and for improving the accuracy of future climate forecasting. The main goal of the TIPEX program is to quantify the climate and ocean circulation change between the Indian and the Pacific Oceans. The contents of the program are 1) to observe the mixing process of different water masses and water transport in the eastern Indian and the western Pacific, 2) to understand the large-scale oceanic-climatic variation including El Nino-Southern Oscillation (ENSO)/Warm Pool/Pacific Decadal Oscillation (PDO)/Indian Ocean Dipole (IOD), and 3) to monitor the biogeochemical processes, material flux, and biological changes due to the climate change. In order to effectively carry out the monitoring program, close international cooperation and the proper co-work sharing of tasks between China, Japan, Indonesia, and India as well as USA is required.

• 대기
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• 제19권1호
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• pp.9-36
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• 2009

Two heavy snowfall events occurred in Yeongnam and Yeongdong regions of the Korean Peninsula during the period from 4 to 6 March 2005 are analyzed. The events were developed by two different meso-scale snow clouds associated with an extratropical low passing over the Western Pacific. Based on synoptic data, GOES-9 satellite images, and precipitation amount data, the events were named as Sokcho and Busan cases, respectively. We analyzed the development mechanism of the events using meterological variables from the NCEP(National Centers for Environmental Prediction) /NCAR(National Centers for Atmospheric Research) reanalysis data such as potential vorticity(PV), divergence, tropopause undulation, static stability, and meridional wind circulation. The present analyses show that in the case of Sokcho, the cyclonic circulation in the lower atmosphere in the strong baroclinic region induced the cyclonic circulation in the upper atmosphere. The cyclonic circulation in the lower and upper atmosphere caused a heavy snowfall in the Sokcho region. In the case of Busan, the strong cyclonic circulation in the upper atmosphere was initiated by the stratospheric air intrusion with the high positive PV into the troposphere during the tropopause folding. The upper strong cyclonic circulation enhanced the cyclonic circulation in the lower disturbed atmosphere due to the extratropical low. This lower cyclonic circulation in turn, intensified the upper cyclonic circulation, that caused a heavy snowfall in the Busan region.

• 대한물리치료과학회지
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• 제18권3호
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• pp.87-92
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• 2011

Purpose : The purpose of this study is to have examined the influence on the blood circulation by comparing the differences between stimulating the sympathetic ganglion and the muscle group among the stimulation variables in interferential current stimulation and to have found out the most effective stimulating mode for the improvement the peripheral blood circulation in the interferential current stimulation. Method : The subjects of the study is the men and women in the twenties, who are in great condition and have no pathological report for the blood circulation influence. The intensity of the inferential current stimulation is the medium degree, 100 bps constant current, which is the comfort and overt degree to confirm the muscle contraction. The areas stimulated by the interferential current stimulation are the stellate ganglion area in the seventh cervical vertebrae and the forearm muscle area. The stimulating time is twenty minutes long. After stimulating the two areas, the change of the blood circulation has been measured. Results : Both stimulating the sympathetic ganglion and stimulating the muscle, before and after interferential current stimulation, we have seen that the amount of blood circulation was increased significantly and statistically in both two groups(p<.01) and that the amount of blood circulation was increased significantly and statistically in the case of stimulating the sympathetic ganglion(p<.01). Conclusion : The conclusion we received that inferential current stimulation had the clear influence on increasing the peripheral blood circulation. And stimulating the sympathetic ganglion area is more effective than stimulating muscle area directly.

• 한국비블리아학회지
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• 제23권2호
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• pp.235-253
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• 2012

도서대출서비스는 도서관 자료를 관외로 빌려주는 것으로 도서관이 제공하는 가장 기본적이고 필수적인 서비스이다. 그러나 최근 경영마인드의 확산과 정보기술의 발전에 힘입어 도서관서비스의 패러다임이 이용자가 찾아오는 서비스에서 이용자를 찾아가는 서비스로 바뀌어가고, 도서관 간의 네트워크가 확대됨에 따라 도서대출서비스에도 많은 변화가 일어나고 있다. 그리고 개별 도서관은 도서대출서비스의 변화에 발맞추어 가용자원을 활용하여 특성화에 대응하고 있는 실정이다. 이에 본 논문은 은평구립도서관에서 시행되는 책단비 도서대출서비스에 관한 연구를 통하여 변화하는 도서대출서비스의 구체적인 내용을 '이용자 중심의 서비스', '네트워크의 확산', '특성화'라는 관점에서 조사 분석하여 그 의의를 찾아보고 도서대출서비스에 대한 이해를 높이고자 하였다.

• 한국추진공학회지
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• 제23권5호
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• pp.43-52
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• 2019

극저온 유체를 사용하는 발사체는 극저온 유체의 자연순환회로를 이용하여 발사체의 엔진 입구를 냉각한다. 자연순환회로의 질량유량은 순환시스템을 구성하는 배관의 길이 및 직경과 시스템으로 들어오는 열유입에 의하여 결정된다. 극저온 유체의 자연순환회로의 순환 검증 및 질량유량 측정을 위하여 실험을 진행하였으며, 이론적 계산 결과와 비교하였다. 비교 결과 12%의 오차가 있음을 확인하였다. 이 결과를 바탕으로 발사체 상단에서 저중력 구간 및 가속 구간에서의 자연순환 질량유량을 예측한 내용을 포함한다. 가속구간에서는 산화제탱크가 100 kPa 내외로 유지하는 것이 자연순환유량 증가에 이로웠으며, 저중력구간에서는 중력가속도의 크기에 따른 최적 압력으로 조절해야 자연순환유량의 최고값을 유지할 수 있었다.

• 디자인융복합연구
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• 제15권5호
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• pp.55-70
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• 2016

최근 몰링(Malling)이라는 용어가 대두되며, 복합쇼핑몰은 현대인에게 새로운 라이프스타일을 제공하는 공간으로 나타나고 있다. 복합쇼핑몰은 판매시설 외에도 엔터테인먼트 시설이나 편의 시설 등 다양한 기능의 시설이 접목되어 있는 공간으로 그 배치나 시설 전반의 동선 계획이 보행자에게 큰 영향을 미친다. 이에 본 연구에서는 서울시에 위치한 복합쇼핑몰 6곳을 대상으로 복합쇼핑몰의 동선계획에 관련하여 사용자 만족도 조사를 실시하고, 이를 바탕으로 복합쇼핑몰의 동선 계획을 위한 기초자료 제공을 목적으로 한다. 본 연구에서는 사용자 만족도 조사를 위하여 복합쇼핑몰의 개념을 살펴보고, 복합쇼핑몰의 동선을 구성하는 구성요소 및 동선의 특성을 선정하였다. 또한, 연구 대상 복합쇼핑몰의 규모나 동선 형태에 따른 사용자 만족도 차이를 분석하기 위하여, 고층형과 저층형으로 구분하고, 동선 형태는 중심공간과 주동선의 형태에 따라 그물형, 고리형, 순환형, 복합형으로 분류하여 분석을 수행하였다.