• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.683-686
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• 2007

This paper investigates acoustical characteristics of open-type ceilings using 1:25 scale model. The field survey in the existing 15 halls was carried out to figure out the ceiling structure. The components of the open-type ceiling were mainly steel truss structures, duct, catwalk and finishing surfaces. In order to investigate the absorption characteristics of the equipped ceiling, the absorption coefficient measurements were made using 1:25 reverberation chamber based on ISO 354. Results showed that the absorption coefficient of the empty ceiling structure (6m-height) with 50%-perforated covering plate was 0.2-0.3 at above 500 Hz. When steel structure was added inside the empty ceiling, absorption coefficient increased by 0.16 at 250-1kHz. Adding catwalk did not increase the absorption, but adding duct increased the absorption at 1-2kHz. NRC of the equipped ceiling was 0.39, and the absorption characteristics were mainly found at high frequencies. In addition, the opening size of the covering plate did not change the absorption coefficient of the equipped ceiling meaningfully.

• 대한기계학회논문집B
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• 제27권8호
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• pp.1042-1050
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• 2003

A heating flow discharged from a 4-way ceiling type indoor unit has been investigated to determine the design parameters for the optimal flow control. The flow was measured by a PIV(particle image velocimetry) system and an experimental model of 1/10 scale with a transparent room was devised by satisfying the Archimedes number. This similarity is generally used in cases where the forced convection has similar magnitude of the natural convection. To optimize the heating flow, several vane angles and vane control algorithms of cross and right angle controls were considered. Regarding the vane angle, experimental results show that 30$^{\circ}$is an optimal angle to avoid re-suction flows without significant increase in flow noise. Temperature distribution measured in the environmental chamber ensures the increased thermal comfort when compared to the case, 60$^{\circ}$angle. At the optimal angle, applying open/close control gives rise to more uniform distribution of the heating flow than without control. Especially, the cross-control seems to be satisfactory for thermal comfort.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2002년도 학술대회지
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• pp.533-536
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• 2002

A heating flow discharged from a 4-way ceiling type indoor unit has been investigated using a PIV(particle image velocimetry) system For the PIV measurements, an experimental model of 1/10 scale with a transparent room was devised by satisfying the Archimedes number, which is generally used in case that the forced convection has the similar magnitude as the natural convection. To optimize the heating flow, several vane angles and vane control algorithms of cross and right angle controls were considered. Regarding the vane angle, the experimental results show that it should be less than $30^{\circ}$ to avoid re-suction flows which decrease the performance of the air-conditioner. At the vane angle of $30^{\circ}$, applying open/close control gives nae to more uniform distribution of the heating flow than without control. Especially, the cross-control seems to be satisfactory for the thermal comfort.

• 한국주거학회논문집
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• 제25권3호
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• pp.165-179
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• 2014

The purpose of this study was to draw application elements of housing interior design according to user-oriented sensibility types. The sensibility evaluation experiments were conducted to target the general user 118 people using the sensibility evaluation tool for housing interior space. The results of the analysis were as: To produce the 'cozy' space, the colors and materials giving soft and natural feeling should be used. For the 'practical' space, type of ceiling and window that give the visually open feeling, the user-oriented furniture arrangement that allows using the space efficiently. For the 'cheerful' space, the simple and natural effects should be produced by using closed space that stable. For the 'traditional' space, the natural fishing material having rough texture should be used. For the 'unique' space, the space contained the dynamic feeling by the diagonal or vertical line and the graphic expression in the wall. For the 'congenial' emotional space, basic is the symmetric, stable and simple space. On the other hand, for the material, small size, natural texture or typical and soft materials should be used. For the 'sensuous' space, the dynamic and vertical sense of space should be expressed by the type of ceiling. The most important elements for the space of 'gorgeous' sensibility, is the color.

• Architectural research
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• 제13권3호
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• pp.3-10
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• 2011

The Characteristics of space are determined by several factors; however, the element that determines the physical characteristic of floors, walls, and ceiling is the structure. This study constructs a wall to analyze the direct effect that the layout of an exhibition wall has on the element of the wall followed by the structural process and visibility of descriptive analysis and examples of art museums that the shift from a perceptional wall to an experiential wall affected circulation. For elements and formation methods of the wall, first, it is made up of open and closed type exhibition spaces, and it can give abundance in qualitative space rather than a quantitative aspect. Secondly, the directivity of space changes according to the development of the visible axis, thus, directly affects the change in visibility. Thirdly, the difference between spatial structure and visual structure is the difference between the visual axis and spatial structure. The wall formation type followed by the combination method, the simple visible structure, which is the type that possesses the simple combination (Room, Zone, Cluster), repeatedly uses the same size of units of space that is orderly and has few spatial axes and the classification of simple type and simple cluster type, which has few visible axes, also exists. Also, with the complex structure of the maze type it displays the reiterated form of the cluster, which is the space with disorderly combination and has much visible axes and spatial axes. Also, these can be divided into three types: 1) Maze Cluster Type, 2) Cross Road Type, and 3) Open Flexible Type. These wall types lead the various changes in circulation, and even each of the arrangement qualities of the exhibitions should be researched according to its exhibition place type.

• 설비공학논문집
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• 제24권11호
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• pp.751-758
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• 2012

Recently, people are paying attention to new forms of construction. For example, deviated from an enclosed type space, people have been interested in an atrium type and an arcade type spaces. In this study, we had hypothesis 'Indoor thermal environment will be influenced by the inflow rate of natural lights with temperature and humidity.' We selected a multi-complex cultural center and conducted this study. This place is consisted of atrium, arcade, and enclosed types. The three spaces were classified according to the type of spaces that have own features along with their forms. The atrium type space has ceiling and the side windows, and the arcade type space has ceiling windows. On the other hand, there are no windows or open parts in the enclosed type space. Three measurement points at each space were selected because of their huge space. Intensity of illumination, temperature and humidity were confirmed by the average value of three measurement points. In addition, surveys were conducted regarding indoor comfort elements in each space.

• 헤리티지:역사와 과학
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• 제47권2호
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• pp.68-84
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• 2014

백제의 능묘는 금강유역으로 천도 후 송산리식의 횡혈식석실묘 ${\rightarrow}$ 남조식의 전실묘 ${\rightarrow}$ 능산리식의 횡혈식석실묘로 변천하였다. 이 변화에서 가장 눈에 띄는 것이 천장 구조의 변화이다. 천장은 궁륭천장(송산리식) ${\rightarrow}$ 터널천장(전실묘와 능산리식 과도기) ${\rightarrow}$ 집지붕천장(능산리식으로 제형, 삼각형, 평천장 세 아류의 형식)으로 변천했다. 이러한 변천과정에서 가장 특징적인 것은 능산리식 횡혈식석실로 이는 백제에서 창출된 특수한 형식이다. 백제의 능묘는 봉분을 중시하지 않아 현저하지 않았다. 이는 개별 능묘를 과시하여 표지하고자 하는 의도보다는 능원의 영역을 중시하는 가족공동체적인 성격이 강화된 것이고 남조의 영향으로 볼 수 있다. 백제의 능원은 백제가 남천한 후 왕가의 능원에서 단독의 독립능원으로 변천한다. 전자는 송산리와 능산리의 능원이고, 후자는 익산의 쌍릉이다. 전자는 완벽한 풍수지리와 함께 남조의 영향으로 볼 수 있고, 후자는 중국이 재통일된 수와 당초의 능원제 영향이다. 왕가의 능원에는 왕릉만 존재하는 것이 아니고 그와 관련된 인물을 배장하였다. 그리고 능원에는 제의시설이 존재했다. 송산리 능원에는 제단이 설치되어 있었는데, 이는 시조묘적인 성격도 가지고 있었을 가능성이 크다. 능산리 능원에는 공동의 능묘에 대해 제의를 시행할 수 있는 노천의 제의 공간이 마련되었고, 이 제의를 담당하면서 선왕에 대한 명복을 빌기 위한 능사가 설치되었다. 이러한 배치나 구조는 신라의 서악동 능원과 아주 유사하다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년 춘계학술발표대회 논문집
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• pp.304-309
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• 2009

The purpose of this study is to develop kitchen furniture design for 40-pyung apartment Houses based on stored item of Cooking, Eating and Utility Area. The research data is gotten at a field study of stored items of Cooking, Eating and Utility Area and depth interview. The results of this study were as follows; 1)The kitchen furniture the preparation unit and the sink, the kitchen table, the heating unit and the service table, arranged at the tall storage. 2)The total bulk considered and holding volume ($2.7m^3$) with ground clearance (40%) planned with about $4.21m^3$. 3)Assumed at height and 162cm did a lower part height with 860mm and the upper depth 340mm, did with 700mm where raises. the storage the ceiling which raises will select and considered and with 2200mm did. 4)Arrangement of the kitchen the kitchen form which is an open type (L/DK or L.D.K) arranged many in forms of letter.

• 화약ㆍ발파
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• 제40권4호
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• pp.1-14
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• 2022

화약류 간이저장소에 대한 현재의 규정이 적정한지를 검토할 목적으로 내부 폭발이 표준적인 저장소의 구조적 안정성에 미치는 영향을 FEM 해석과 현장 실험을 통해 분석하였다. 연구 결과, 에멀젼 계열 폭약 15 kg에 대한 기존 저장소 구조물의 방폭 성능이 충분하지 않은 것으로 나타났다. 따라서 여기에 대한 하나의 대안으로서 폭약을 분할하는 방법을 상정하고 순폭실험을 수행하였다. 실험을 수행한 결과, 폭약을 분할하는 방법이 예상대로 잘 작동하는 것을 확인하였으며, 시험 결과에 근거하여 적정한 분할 폭약량도 결정하였다. 또한, 저장소 구조물 상부를 개방하는 방법을 시험한 결과, 폭발압력이 신속하게 배출되어 구조물 손상이 크게 저감되는 것을 확인하였다. 이러한 구조물 형태는 화약류 간이저장소에 대한 새로운 설계기준으로 사용될 수 있을 것이다.