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검색결과 66건 처리시간 0.027초

소형풍동을 이용한 단동 비닐온실의 열손실 분석 (Analysis on Heat Loss of Single-span Greenhouse Using Small-scaled Wind Tunnel)

  • 김영화;김형권;이태석;오성식;유영선
    • 생물환경조절학회지
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    • 제29권1호
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    • pp.73-79
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    • 2020
  • 본 연구는 일정한 풍환경하에 온실 피복재 관류전열손실을 분석하기 위하여 온실 열손실 분석용 소형 풍동을 제작하고 성능을 분석하였으며 모형온실을 적용하였을 때의 관류전열손실을 분석하였다. 소형 풍동은 시험부 측 공기흐름이 정상상태를 유지하고 편차를 최소화하기 위하여 풍동의 각 요소를 반영하여 구성하였으며 송풍부, 확산부, 정류부, 축소부, 시험부로 구성하였다. 소형 풍동의 형태는 개방형, 토출식으로 결정하였고, 시험부 규격은 제작하고자 하는 모형온실의 규격과 상사비율, 시험부의 단면 폐쇄율을 감안하여 결정하였다. 상사비율을 풍동실험에 적용할 모형은 농업시설 중 가장 큰 비중을 차지하고 있는 단동 비닐온실을 대상으로 하였다. 소형풍동 내 풍속을 조절함에 따라 나타나는 모형온실 피복재의 관류전열계수는 피복재 면을 크게 지붕면과 측벽면, 앞뒷면으로 나누고 각 면별 계측 데이터를 평균 내어 산출하였다. 지붕면은 풍속이 증가함에 따라 전열계수도 증가하나 증가폭이 감소하는 구간은 배치각도에 따라 1-2ms-1과 2-3ms-1으로 구분되어지는 것으로 판단되었다. 측벽면의 전열계수가 증가하는 폭이 큰 구간은 0-1ms-1 구간인 것으로 판단된다.

한국고대가람 변천양상에 관한 불교사적 고찰 - 불신관의 발전과 불탑 및 불상의 위상변천에 관한 분석을 중심으로 - (A Study on the Changing Patterns of the Ancient Buddhist Temples of Korea - Based on the Analysis about Development of View of Buddha-kaya, Change of Status of Stupa and Statue of the Buddha -)

  • 이주형;장석하
    • 건축역사연구
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    • 제20권1호
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    • pp.95-116
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    • 2011
  • It is a true fact that the ancient Buddhist temples of Korea were great, important historical influence revealing the transition and developing stages of all the BUddhist temples in Eastern Asia including China and Japan. Before Mahayana arose within India, the monastery and pagoda were united during the conflict and development of the original Buddhism and pagoda faith. With the arising of Mahayana and the introduction of Buddhist statues, the Buddhist temple and pagoda were in conflict and resulted in separation. With the creation and development of the Mahayana Bodhisattva concept, Hinayana and Mahayana started to show doctrine differences and expressed each others' characteristics relevant to the structure of the temple. As a result, the Buddhist Temple having 1 pagoda spread in China together with Hinayana and Mahayana. The Buddhist temple of Hinayana had its temple and pagoda separated and the Buddhist temple that has a pagoda in front was divided into a form of 1 pagoda and 1 main temple. The temple and pagoda for Mahayana in the form of 1 pagoda and 2 temple, where the main statue of the Buddha may be worshipped from both the left and right hand sides, were separated in the form of 1 pagoda and 3 temples to have its original form again. Mahayana was first introduced into Goguryeo through the routes in the northern region and developed from having 1 pagoda and 2 temples, to having 1 pagoda and 3 temples. China was influenced by the southern regions, which is why Abhidharma was introduced into Baekje. Later on, the importance of Bodhisattva increased and the transition speed of the Buddhist temple having 1 pagoda and 3 temples accelerated, as Buddhism became more popular and as Mahayana flourished. The statue of the Buddha on both sides of the pagoda shall gradually move next to the central temple, and the temple shall form large crowds to not only form a tacit boundary with the pagoda but the expansion of Bodhisattva shall also have a wall or a corridor constructed in between the central, left and right hand side temples to form separate areas, and shall have a pagoda built in front of the temples that worship from both sides. In conclusion, independence shall exist among each Bodhisattva within the Buddhist temple, and the status of the pagoda shall fall and appear as the pagoda on both sides in front of the main Buddha statue.

거주자 주택 점유율을 고려한 공동주택 발코니 PV시스템 디자인 - 공동주택의 발코니 PV시스템 디자인과 성능검증 중심으로 - (Balcony window style photo-voltaic(PV) system design by considering resident's residential time rate - Focus on the design of apartment building balcony window PV system and it's performance -)

  • 진경일
    • 한국실내디자인학회논문집
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    • 제18권5호
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    • pp.101-110
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    • 2009
  • In case of general residential house, photovoltaic can be installed at roof, wall, and any other places. But, in case of apartment building, there has not enough roof space to install photovoltaic panels to supply enough electricity. Actually, apartment building roof and facade wall (exclude the balcony window space) is not enough space to produce and supply the electricity to residents by installing PV panel. Generally, the space of facade balcony with windows in facade wall at apartment building occupied about $70{\sim}80%$, in all facade space. So, if we could use the balcony and windows space in facade as PV to generating electricity, there could contribute the energy saying. But, PV cell is opacify. So if it installed at front window area in apartment building, residents may have displeasure for that opacity character. But the other hand, residents are not always in house especially in day time that is exactly good time for generating electricity by PV. If we can use PV at the facade balcony with window without collusion of resident's displeasure, there have good attraction to using sustainable energy. Hence, this study suggests the design of facade balcony window style PV by considering resident's living pattern in apartment building. The methods of this study are as follows. At first, this study surveyed to the residents about residential time in their home and asked user demand by Delphi survey. At second, this study designed balcony open style PV system which oriented to the user demand. At third, this study tests designed result performance by computer simulation that compared design result with old design. As a result, For the purpose of satisfying the resident demand, there designed sliding window style which slide the several door systems to the one side. That would be make balcony absolute open scenery to the residents. Hence, the designed system performance results were as follows. When we compare the small apartment and large apartment, smaller one has good performance than larger one. Because resident's residential time characteristic. And that has more good electronic performance than vertical style that is similar to roof style.

통도사 상로전 영역의 공간구성 변화 고찰 (A Review on Changes in Spatial Formation of the Sangrojun Area in Tongdo Temple)

  • 홍재동
    • 건축역사연구
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    • 제10권3호
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    • pp.45-60
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    • 2001
  • The Tongdo temple have been transformed continuously since its first establishment about 1300 years ago. Nevertheless three critical elements specified by 'Jajangyulsa', founder of the temple have not varied over the times but rather strengthened and strongly combined. All elements and doctrines of the religion coexist and form a harmony within the whole of the temple. This researcher examined what changes, or combinations, in spatial formation were sought for such unique structures of the Tongue temple by focusing mainly on the Sangrojun area of the temple to obtain the following findings. First. unlike a work by a Japanese researcher 'Sekino Tadashi', the east yard of the main building was found located on the section line which corresponded to the separation line of Yungkuncheokdo(營建尺度=measure running) from the edge of the Keumkangkyedan(金剛戒壇 =Buddhist platform) embankment to the corner column of the Kamrodang. This was confirmed as a result of the review of photos shown in [Chosun Kojukdobo]. Second, the number of stairs used for the Keumkangkyedan was thought to become three when the temple was firstly restored in 1379 as a result that this researcher reviewed Chinese literature 'DoSun' and [Kyedandokyung(戒壇圖經)], records by 'Lee saek' and 'Jung Shihan', studies of Yungkun measure and actual changes in the temple. Then the temple was forth restored in 1705 when the second of the stairs was changed in area and height and at the same time grounded hard for a space for a Buddhist service. Third, the roof of the main building was probably changed in shape during the Koryo period when the plane structure, furnish arrangement, emphasized front, stone lanterns of the building and political factors of that time were all considered. Fourth, the main building was Initially designed to provide a Buddhist sermon service which was assumedly followed by a similar service at a Keumkangkyedan. Thus the main building had a small window on the northern side which might be opened up to look out or otherwise go outside like a door. However, the window was probably locked up like a surrounding wall since the main building was entirely repaired after the end of Japanese invasion of Korea in 1592.

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일본(日本)의 고상식(高床式) 건축(建築)에 관(關)한 연구(硏究) (A study on the Upper Risen Architecture of Japan)

  • 이병건
    • 건축역사연구
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    • 제12권3호
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    • pp.19-38
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    • 2003
  • The purpose of this study is to analyze the architectural character of the upper risen architecture(高床式 建築) in Japan. There are few upper risen architecture and architectural remains in Korea. Until now most of Korean researcher recognized that the upper risen architecture is southern regions' form. But there are a few numbers of upper risen buildings in northern regions of Korea and China. Therefore we need to compare northern and southern regions' upper risen architecture. The scope of this study is architectural remains, sites and present buildings about upper risen architecture in Japan. The period of this study is from third to eighth century. The method of this study is the analyses of site plan(the ratio of front and side length) and construction about Japanese Architecture. And then this study compare Japanese with other countries in Korean and Chinese upper risen architecture. Results of the study are below. 1. In Japan, upper risen architecture was introduced into southern regions(southern China and southeast Asia) with rice farming culture. 2. After introduced upper risen architecture, they were influenced many architectural technique of Korean and Chinese. 3. There were many technical improvement(such as foundation stone standing method, high technical wooden frame structure and adaptable triangle frame wall at moisture) the Japanese upper risen architecture in Nara Period(奈良時代). 4. As the results, I found out that there were many similarity Korea and Japan in upper risen architecture. I think that we will try continuous to study another regions' upper risen architecture in order to define conclusion.

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탄성층에 삽입된 음향 하이드로폰의 외부 유입소음 영향 연구 (Investigation of Outer Flow Noise Reduction of the Hydrophones Embedded in the Elastomer)

  • 박지혜;이종길;신구균;조치영
    • 대한공업교육학회지
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    • 제33권2호
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    • pp.273-286
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    • 2008
  • 수중에서 UUV(Unmanned Underwater Vehicle)에 장착되는 수중 음향 센서 배열은 UUV의 측면이나 전면에 부착하여 외부 신호를 탐지하게 된다. 이러한 센서 배열은 UUV의 특성상 곡면배열(Conformal array) 형태이며 유체 유기 소음의 영향을 받는다. 따라서 본 논문에서는 탄성층에 삽입된 하이드로폰이 외부 유입 소음의 영향을 받는 정도를 해석하였다. 유입 소음은 난류 경계층에서 발생하는 Corcos 모델을 이용하였고 주파수 밀도 함수를 이용하여 수치해석 하였다. x-방향의 파수인 kx에 다른 전달함수의 특성은 탄성층의 두께가 커질수록 전달함수의 적분값은 적어지므로 소음의 영향은 줄어드는 것으로 나타났다. 또한 탄성층 및 고정판의 탄성계수, 밀도 등의 변화가 전달함수 값의 변화를 일으키는지를 조사하였다. 향후 이러한 연구는 UUV에 장착되는 곡면 배열 센서의 설계에 활용할 수 있을 것으로 판단된다.

스크린 X 영상 투영 방식의 특징 연구 (Research on the Image Projection of Platform Screen X)

  • 선심이;정진헌
    • 디지털융복합연구
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    • 제15권12호
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    • pp.503-508
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    • 2017
  • 스크린 X가 프리미엄 대형 영화(Premium Large-Format, 이하PLF)의 플랫폼 중 하나이다. 스크린 X은 관람관안에 중앙 스크린과 좌우 양쪽 스크린을 연결해서 세 면 스크린을 구성한 시술이다. 이 새로운 나온 PLF 플랫폼은 관람자에게 파노라마 비주얼을 제공할 수 있다. 다만 영상 콘텐츠를 촬영했을 때 스크린 2 개 더 있기 때문에 콘텐츠 화면을 더 추가적인 제작해야 된다. 스크린 X는 제일 명확히 특징이 270도 범위로 콘텐츠를 시청할 수 있는 것이다. 시청자가 일반 영화 스크린 화면의 프레임 워크를 넘어선 경험을 갖도록 하여 시청자가 시청 경험에 대한 특정 장면을 가장 직접적으로 볼 수 있다. 그래서 스크린 X는 3D 안경을 착용하지 않아도 시청자에게 몰입 효과를 줄 수 있는 의미가 있다. 이 특징 연구 결과에 따라 스크린 X에 맞은 콘텐츠 사양 및 제작 방식을 연구하며, 시각효과를 극대화한 콘텐츠에 대한 연구를 목표로 한다. 그리고 향후 스크린 X 영상 콘텐츠 관련 연구자와 산업계 종사자들에게 향후 도움이 될 수 있는 연구 논문으로 사료 될 것을 기대한다.

제주 초가(草家) 형태를 직물 문양으로 활용한 텍스타일 디자인 및 지역패션문화상품 개발 (The development of cultural products and textile designs with the patterns of Jeju Choga)

  • 윤성희;홍희숙
    • 복식문화연구
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    • 제23권1호
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    • pp.45-62
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    • 2015
  • This study is to develop cultural products based on 'Jeju Choga', which means the traditional houses in Jeju. For the product development, old literature review, field surveys, and consumer surveys were employed. Through old literatures and field surveys, the unique and visual characteristics of Jeju Choga were confirmed: A thatched roof with lattice pattern, a side wall and fences with porous stones, a 'Jungnang' serving as a gate, and a 'Pungchai' preventing strong sola radiation and 'Ollai' meaning a narrow street in front of the Choga. As a results of consumer survey conducted before the development of products, consumers highly recognized and associated Jeju Choga as Jeju representative image. The six basic patterns of Jeju Choga were drawn and eight textile designs were created through the repeated arrangements of the basic patterns. Using the created textile designs and digital printing method, the eleven new fabrics with the patterns of Jeju Choga were developed. The various kinds of ten bags and tow wallets made with the new fabrics. As a result of consumer evaluation for the twelve products made in this study, the scores of preference and purchase intention were above the average work for the most products of them. In particular, the preference and purchase intention of the square shoulder bag, the big-size shopper bag, and the small-size cross bag were very positively evaluated. Therefore, it is confirmed that Jeju Choga could be very useful as a motif for the development of cultural products focusing on Jeju tourism souvenir market.

한국 전통건축미(美)와 전통가구에 내재된 자연미(美)의 유기적 특징 연구 (Study of the organic characteristics between Korean traditional aesthetic of architecture and the natural beauty being intrinsic in traditional furniture)

  • 임광순
    • 한국가구학회지
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    • 제20권5호
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    • pp.504-516
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    • 2009
  • Korean traditional architecture has been carried out in the manner that it harmonized surrounding natural environments and never disturbed them in the scale which did not overwhelm the nature, based on the view of architecture predicated on Yin Yang School. The exposed grain of the wood like pillar, hinge and house rafte, the linear expression of the construction material and the formation between the window and door monopolizing the front side presented a harmony with the nature showing the linear structure. Furthermore the ceiling is low due to the sit life style thanks to the ondol (Korean under-floor heating system and the furniture was made in simple manner to utilize the space as large as possible, for the interior was narrow and close, and also the furniture placing in the middle of the room was movably manufactured to improve the room space. Like this Korean traditional furniture was close associated with the low height and simplicity and harmonized with the blank of the wall accordingly, and it characterized linear & planar natural beauty focusing on the simple and refined unique beauty, because it was made in a good harmony with the interior utensils. This study has presented that the organic characteristics of Korean traditional aesthetic of architecture and the natural beauty being intrinsic in traditional furniture have a mutual relation on the basis of not only the visual recognition, also the aesthetic of naturalism made of the natural material, the constructional naivety as a frame method and the linear & planar formative beauty shown in appearance.

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전주장의 구조적 특징과 금구장식 연구 (A Study on the Structural Characteristics and Metal Ornament of Jeonju-Jang)

  • 백다희;임승택
    • 한국가구학회지
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    • 제28권3호
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    • pp.207-223
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    • 2017
  • Jeonju-Jang is the wood furniture that was made in Chonbuk Jeonju province during the Joseon Dynasty, and was used by middle-upper social classes. It has value as a local cultural heritage because it has unique characteristics in terms of the shape of the furniture, the metal ornament and various functions are integrated in accordance with user's requirements. Therefore, the purpose of this study is to define the structural characteristics of the Jeonju-Jang through case studies of 16 existing artifacts in order to preserve and inherit the value as local cultural resources. The conclusion is as follows. First, Jeonju-Jang in the late period of Joseon Dynasty that is made up of one board to the bottom with the binding of the board. and the front wall, the Juibyuckkan and the Meoruemkan are omitted or made small, so the structure of the surface is simple. There are three or four drawers under the Cheon pan(top plate). There are drawers and shelf inside the hinged door. In the case of a two-layer type, there is a Gaegumeong type door which has half of one side hinged. Second, Jeonju-Jang of the Japanese Ruling Era had a Juibyuckkan by frame binding and an increase in the number of Meoruemkan. and it had independent legs. The Cheon-pan(top plate) was more left and right than both sides. Third, in the late Joseon Dynasty period as a feature of the metal ornaments, cast iron and yellow brass were used as materials. In the Japanese Ruling Era, nickel was mainly used. Various patterns were engraved and the number increased, and it became gorgeous surface as a whole.