• 한국자동차공학회논문집
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• 제17권2호
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• pp.171-179
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• 2009

An object of this study is to confirm application characteristics of the vortex tube apparatus for substitution of the intercooler in a common-rail diesel engine. The turbo pressure, the intake air mass flow rate and the charging air cooling ratio of the intercooler were measured in an experimental engine. The vortex tube apparatus was made after confirmation of the geometric phenomena in fundamental experiments. The vortex tube designed with fundamental data was applied to a conventional common-rail diesel engine instead of the intercooler. Its application characteristics, engine performances and emissions were investigated. From this experimental results, we suggested the vortex tube can be applied to a conventional common-rail diesel engine throughout extra complement. We can also expect the higher cooling effect, if we consider the application of the vortex tube in supercharging diesel engine without the intercooler.

• 한국실내디자인학회논문집
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• 제20권1호
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• pp.173-181
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• 2011

Contemporary architecture has shown interest in surface after breaking off the relation with structure. Also, the development of contemporary media has brought the great change to the surface of architecture. Interaction among the people, architecture, and environment is also the main point of interest in adapting the role of media to the architecture. But contemporary media itself have been applied on surface in architecture lately. So, it is purpose of the study to analyze the contemporary media characteristics application on the surfaces of EXPO pavilions based on the related characteristics of interaction effects. The categories and the contents for the frame of case studies were arranged through document research and field study. Case studies were focused on the pavilions of the World Exposition Shanghai China 2010. Surface can make the interaction between human and architecture more dramatically by the application the role of media. It was analyzed through the study that the interaction level of people is the important issue shared in digital or analog media application on surface of pavilion. The complementary relationship between surface of contemporary architecture and contemporary media can be manipulated and enriched by the application of various style of media on surface.

• 한국표면공학회지
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• 제49권4호
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• pp.363-367
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• 2016

For the industrial application of electropolishing process, we investigated electropolishing characteristics of stainless steel through increasing the specimen size or electrode gap. In this study, we performed a set of experiment with the specimen size of $10cm{\times}10cm$ and the electrode gap of 1 cm or more. In the view of the electropolishing process, the electrolyte temperature and the polishing time were most important factors compared with the current density and the electrode gap. Especially, the electrolyte temperature most importantly affected surface roughness and current efficiency on electropolishing characteristics. For the industrial application of electropolishing process, it should be considered for important factors such as electrolyte temperature, polishing time, current density and electrode gap, etc.

• 한국유기농업학회지
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• 제9권1호
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• pp.61-73
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• 2001

This study was conducted to investigate the effect of sewage sludge application on the growth of chinese cabbage and the changes of chemical properties of soil. The experiment were set up with two different place and cultivated from Feb. 10 to June. 20 of 2000. Treatments are 0, 1.25, 2.5, 5, 10 and 20kg/3.3$\m^2$ of sewage sludge applicated into the soil and recorded the growth characteristics. Chemical properties of soil were also analysed before and after treatment. The application of the sewage sludge resulted in increasing the content of EC, cations exchange capacity, available phosphate and organic matter. And increased the growth characteristics in terms of the number of leaves, leaf area, fresh and dry weight regardless of crops experiments. Optimum amount of the sewage sludge depended on chemical properties of soil used. This results demonstrated that application of sewage sludge in the soil attribute to have play an important both improving soil chemical properties and promoting the crop growth. As lowering the soil pH(pH 6) heavy metal content increased compared with higher pH(pH 7). Feasibility was recognized in the application of sewage sludge as a fertilizer for the growth of chinese cabbage. Detrimental effects such as heavy metal in the soil and crop followed by the application of sewage sludge was not observed.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.776-779
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• 2006

The alignment of liquid crystal (LC) is one of the key issues of liquid crystal display (LCD) technologies. In this study, we aligned polyimide (as the LC alignment layer) by ALT plasma beam and to realize the stability and characteristics of this technology. The characteristics such as anchoring energy, pre-tilt angle, voltage holding ratio(VHR) and residual direct current(Rdc) were discussed. Besides, we applied it to the in plane switch (IPS) mode 23" WXGA real panel, the performance parameters and electrical properties were measured and compared with those of rubbing alignment. From the result, we demonstrated a successful LC alignment treatment process in real panel by ALT plasma beam.

• 대한한의학원전학회지
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• 제28권3호
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• pp.125-139
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• 2015

Objectives : In this article, the application of the theory of Sameumsamyang Gaehapchu to clinical treatment in some important medical books of traditional medicine, for example Jienuelunshu(?虐論疏) etc, is investigated. Methods : The literatures containing the application were searched in the Sikuquanshu(四庫全書) database by key words of Sameumsamyang and Gaehapchu, and then analysis and investigation of significant documents has followed. Results : The application of the theory of Sameumsamyang Gaehapchu to clinical treatment has been mainly done with some characteristics that are expansion to the theory of visceral organs, suggestion of various medicines, and definite explanation of the relationship between Gaehapchu. These characteristics made it easy to predict prognosis of diseases and to determine order of treatment. Conclusions : After the age of Huangdineijing, the theory of Sameumsamyang Gaehapchu to clinical treatment has been developed and realized through application of the theory to clinical treatment.

• 한국재료학회:학술대회논문집
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• 한국재료학회 1999년도 춘계학술발표강연 및 눈문개요집
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• pp.139-139
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• 1999

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 추계학술대회 논문집
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• pp.213-213
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• 2009

In this paper, we investigated the current limiting characteristics due to the application location of the superconducting fault current limiter (SFCL) such as the feeder, the bus, the secondary side of transformer in a power distribution system. In addition, the quench and the recovery characteristics of the SFCL installed in each location of the power distribution system were compared each other. Through the analysis, in case that the SFCL was applied into the feeder line, its current limiting and voltage-drop compensating characteristics were confirmed to be the more effective. On the other hand, the power burden of the SFCL was increased higher compared to the SFCL'S other application location.

• Transactions on Electrical and Electronic Materials
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• 제15권6호
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• pp.348-352
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• 2014

In light of the sure protection function, the most important factors of a varistor are the clamping voltage ratio and degradation characteristics. The degradation characteristics of Pr/Co/Cr/Er co-doped zinc oxide varistors were investigated by impulse currents (0.4~2.1 kA) stress for the specified content of $Er_2O_3$ (0.5 and 2.0 mol%). The varistor doped with 2.0 mol% $Er_2O_3$ exhibited the best clamp characteristics, with the clamp voltage ratio (K) in the range of K = 1.63~1.88 at the impulse currents of 5-50 A. However, the varistor doped with 0.5 mol% exhibited excellent electrical stability, with variation rates for the breakdown field, for the nonlinear coefficient, and for the leakage current density of -6.9%, -12.6%, and -14.3%, respectively, after application of an impulse current of 2.1 kA. In contrast, the varistor doped with 2.0 mol% was destroyed after application of an impulse current of 1.2 kA.

• 한국콘텐츠학회논문지
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• 제13권3호
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• pp.32-42
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• 2013

스마트폰 시장의 급격한 성장으로 새로운 비즈니스 모델이 필요함에도 불구하고 그 동안의 스마트폰 앱 관련 연구들은 기술수용모델(TAM: Technology Acceptance Model)과 Rogers의 혁신확산이론(Diffusion of Innovation Theory)을 기반으로 한 것이 대부분으로 실제 사용자 특성에 관한 연구는 부족했다. 이 연구에서는 스마트폰 앱 기능을 분류하고 기능별 앱을 이용하는 사용자들의 특성을 분석하였다. 스마트폰 앱의 기본 기능인 통화 및 메시지, 음악 및 동영상, 정보검색, 게임, SNS(Social Network Service)에 따른 사용자 특성은 인구통계학적 특성뿐만 아니라 스마트폰 이용 특성(앱 다운로드 빈도, 유료 앱 다운로드 경험)에서도 통계적으로 유의미한 차이가 있었다. 그리고 스마트폰 이용 특성은 스마트폰 사용기간과 밀접한 관련성이 있는 것으로 나타났다. 대표적으로 음악 및 동영상 관련 앱을 활발하게 사용하는 집단은 앱을 주 3회 이상 다운로드받는 20대 여성으로 유료 앱 다운로드 경험이 많다는 것이 특징이다. 유료 앱 다운로드 경험이 많다는 것은 앱 마켓의 플레이어들에게 긍정적인 부분이지만, 음악 관련 앱 제공의 경우 대규모 업체들이 독점하고 있어 중소규모 플레이어들은 기존과 차별화된 혁신적인 비즈니스 모델을 개발해야 함을 시사한다. 이 연구 결과는 앱 이용에 따른 사용자들의 특성을 살펴봄으로써 앱 마켓의 플레이어들이 비즈니스 모델을 기획하고 각 기능별로 보다 사용자 특성에 맞는 앱 상품을 개발하는데 유의미한 시사점을 제공할 것으로 기대된다.