• KIEAE Journal
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• 제16권6호
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• pp.129-134
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• 2016

Today, natural ventilation systems are widely applied in multi-family housing. However, studies using the wind data trend line of the blower door test are insufficient. Purpose: Through this study, we will propose a computational method about ventilation performance of natural ventilation systems by conducting blower door test. Method: First, we sealed the gaps between the main systems including the natural ventilation system and conducted the blower door test. Next, the natural ventilation system was opened, the blower door test was conducted, and the difference in air flow rate between when closed and when opened was checked. Blower door test was carried out with a pressure difference of 50 Pa. Result: Therefore, the ventilation performance of the natural ventilation system was checked by drawing a trend line using the data to calculate the air flow rate at 2 Pa of the natural ventilation equipment standard pressure difference.

• 한국안전학회지
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• 제16권1호
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• pp.25-30
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• 2001

This paper studies the effect of vibration characteristics of tube line conveying fluid with the power steering system of bus. We modelled fluid-filled tube line using I-DEAS software to investigate vibration characteristics of the power steering tube line. And we obtained the natural frequency of tube line through finite element analysis. Analytic solutions were compared with experimental solutions to verify finite element model. We tested the tube line to examine an effect of pressure pulse by vane pump and variation of geometry of tube. From both the experimental results and the modeling results for vibration characteristics of the tube line conveying fluid, we confirmed that vibration characteristics induced by pulse propagated along the power steering tube line and resonance occurred around the natural frequency with pulse excitation.

• 복식
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• 제27권
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• pp.53-74
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• 1996

The Doryon-Line is the lowest line of the Chechori and Dangeu and the length of the Chechori and the Dangeu have wide influence on the Doryon-Line. Also the change of the Doryon-Line is re-lated to the proportion the length the depth that is the curved proportion and the two curved proportion 0.04 and 0.13 are related to the roof style of the traditional architecture in Chosun Dynasty. The Chosun people have made a change the Doryon-Line monotonous in the 14C-15C but the Doryon-Line have been full of variety every fifty years in the 15C-18C. Especially Chosun people have been at war in the mountains and fields in the Doryon-Line are 0.06 and 0.07 in this period I think that the curved proportion 0.06 and 0.07 are symbolized the natural beauty in the mountains and trees of the Korea.

• 한국도로학회논문집
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• 제20권4호
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• pp.35-46
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• 2018

PURPOSES : The purpose of this study is to compare the lane curing time of natural drying and a lane drying device when painting lines on a highway. METHODS : The painting process was carried out in July 2015 and September 2015, respectively, for the Gimcheon IC - Gimcheon JC. After the painting, measurements were obtained three times at six measurement points located at 20 m intervals on the shoulder line and the dividing line. The curing time was measured for natural drying and drying using a lane drying device, and compared for different pavement types (asphalt, concrete) and paint types (waterborne paint, methyl methacrylate paint). RESULTS : The results of the lane curing time comparison on the highway are as follows. The combination of asphalt and methyl methacrylate paint cured more rapidly during both the natural drying and drying using the lane drying device. Finally, it was cured at least 32.2% and 40.7% faster when using a drying device than in natural drying. CONCLUSIONS : The comparison of lane curing time of the highway showed that the combination of asphalt and methyl methacrylate paint cured more rapidly when using both natural drying and a lane drying device.

• 전자공학회논문지B
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• 제31B권3호
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• pp.14-23
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• 1994

A natural language processing system usually has the demerit that its processing time is relatively long. If an interactive system makes its user kept waiting long, it can't be said to be practical. In this paper, the on-line natural language parser in which its processing coincides with the sentence's inputting is designed. Since the greater part of morpholgical and syntatic semantic analysis is already performed during the keyboard input, user can get a prompt response. Moreover, the Korean parser is implemented in multitasking environment, and it is compared with an off-line parser. The on-line parser can be considered to be efficient for its real time processing.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 춘계학술대회 논문집
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• pp.49-51
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• 2009

Photonic crystal is a dielectric materials or a set of different dielectric materials with periodic structure of refractive index. Line defect obtained by leaving out a row of rod along the $\Gamma$-X direction. We showed the change of group velocity in waveguide mode and found a small group velocity. Characteristic of the small group velocity described by electric field distribution. As the phase variation, small group velocity confirmed from positive to negative.

• Smart Structures and Systems
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• 제9권1호
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• pp.1-20
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• 2012

In bridge engineering, maintenance strategies and thus budgetary demands are highly influenced by construction type and quality of design. Nowadays bridge owners and planners tend to include life-cycle cost analyses in their decision processes regarding the overall design trying to optimize structural reliability and durability within financial constraints. Smart permanent and short term monitoring can reduce the associated risk of new design concepts by observing the performance of structural components during prescribed time periods. The objectives of this paper are the discussion and analysis of influence line or influence field approaches in terms of (a) an efficient incorporation of monitoring information in the structural performance assessment, (b) an efficient characterization of performance indicators for the assessment of structures, (c) the ability of optimizing the positions of sensors of a monitoring system, and (d) the ability of checking the robustness of the monitoring systems applied to a structure. The proposed influence line- model correction approach has been applied to an integrative monitoring system that has been installed for the performance assessment of an existing three-span jointless bridge.

• 한국소음진동공학회논문집
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• 제22권10호
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• pp.925-931
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• 2012

The air-conditioner for railway vehicle should have vibration durability in order to operate normally in vehicle running situation. KS R 9144(vibration test methods for railway vehicle parts) is used to verify the vibration durability. The specifications of compressor, condenser and evaporator for air-conditioner in railway vehicle are standardized, but the shape and structure of pipe lines are not specified. Because the air-conditioner handler produces the pipe line arbitrarily, sometimes the pipe line is broken during the vibration durability test. In this research the cause identification and solution of pipe line breaking problem in during the vibration durability test were studied for air-conditioner of railway vehicle(diesel multiple unit). It was found that the natural frequency of pipe line is related to the pipe line breaking by experiment. A new pipe line shape was introduced by using FEA in order to avoid the resonance. The prototype new pipe line was applied to air-conditioner and the natural frequency was measured by experiment in order to verify the resonance avoidance. The vibration reduction of air-conditioner with new pipe line was reviewed by comparing to the air-conditioner with original one.

• 복식문화연구
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• 제2권1호
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• pp.123-143
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• 1994

The aim of this research analyze women's preference in types and formation of skirt lines by their ages and body shapes. The aim of this study is for women to select clothing which can cover their shortcomings and to present the practical and positive data about skirt design to clothing maker. The results of this research are summarized as followed : Tight skirt is the beest preferred and flare is the next. Narred silhouettes re preferred about th width of each kind of skirt, but as for the gored and flare skirts middle-width silhouettes are preferred. Preferred lengths of the skirts are different from ages; the middle like minilines, the thirties like miniline, the thirties and the forties natural line, and the fifties midiline, and according to body shapes, the skinny or standard shape like natural line and the fat midiline. All age prefer natural waist line, and twenties and the skinny like high waist line and belt compared to fifties and the fat. All ages like dart-treated skirt waist and wrinkle-decoration with narrow vertical lines or tuck-decoration with narrow horizontal line. White and blue are preferred colors of skirts in spring and summer, the skinny and the standard like blue, whereas the fat like black. All ages like soft materials and one-colored skirts without patterns Adult women like jipper to open waist of a skirt. Most of them like back positioned one, but fifties and the fat prefer side positioned ones.

• 한국의류산업학회지
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• 제19권5호
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• pp.608-619
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• 2017

In this research, we analyze jackets from the Paris Haute Couture Collection from 2000 S/S~2015 F/W to investigate how shape, tailoring component, and design of jackets have changed. Our analysis of 2,493 jackets from the collection shows that the hour-glass silhouette was the most popular among silhouettes and that standard-length was the most popular jacket length. Such jacket shape expresses the natural beauty of human body. Regarding Tailoring Components, our analysis shows that tight sleeve and natural shoulder line, which is neither too wide, padded, nor low, were prevalent. The analysis also shows that tailored collar and button closure were the most common. Tight sleeve and natural shoulder line, which fit the body outline, allow the silhouette to show natural curves of the human body. As for jacket design, popular colors differed by season, but single-colored jackets prevailed, and woven was the most used material. Since 2000, the most favored form of jacket in women's fashion was a standard-length jacket with an hour-glass silhouette, tight sleeve, natural shoulder line, and tailored collar. This suggests that jackets emphasizing natural curves of the body were favored. Overall, silhouette, length, sleeve, and shoulder line remained consistent while collar and closure varied. This indicates that collar and closure method play a significant role in changes in fashion. Seasonally, elements of shape, tailoring component, and design coexist, but once the shape is determined, the tailoring component and design change in relation to each other.