• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.2-5
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• 2022

사람의 체내 장기는 복잡한 구조로 되어있으며 특히, 소장은 길이가 약 7m 길이를 가지고 있어 내시경 검사가 쉽지 않고 내시경 검사 시 위험도가 높다. 현재는 캡슐 내시경으로 검사를 수행하고 있으며, 검사 시간이 매우 긴 편이다. 의사는 제거된 저장장치를 컴퓨터에 연결해 환자의 캡슐 내시경 영상을 저장 후 프로그램을 사용하여 판독하지만, 캡슐 내시경 검사 결과 영상 길이가 길어 판독 시간이 많이 소요된다. 또한 소장의 경우 융모에 의해 많은 굴곡이 존재해 검사 과정에서 영상의 폐색 영역이나 명암이 뚜렷이 나타나게 되어 검사 시 병변 및 이상징후에 관해 놓치는 경우가 발생할 수 있다. 본 논문에서는 의사의 영상 판독 시간 단축과 진단 신뢰도 향상을 위해 인공신경망을 이용한 소장 캡슐 내시경 병변 검사 보조 방법을 제공한다.

• 한국항공우주학회지
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• 제37권4호
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• pp.419-424
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• 2009

소형 인공위성의 궤도 보정을 위한 300 W급 홀 추력기의 제논연료공급장치를 개발하였다. 가스 상태의 제논 연료를 150 bar에서 2 kg을 저장할 수 있으며, 0.5 SCCM의 미세 유량을 제어할 수 있다. 미세 유량을 제어할 수 있는 유량 제어밸브의 구동을 위해 시스템을 구성하고, 시험을 통해 성능검증을 수행하였다. 이를 통해 $1.0{\times}10^{-6}$ torr압력의 진공에서 연료공급장치가 성공적으로 동작함을 확인하였다.

• Journal of information and communication convergence engineering
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• 제8권1호
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• pp.51-58
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• 2010

This paper proposes an edge adaptive color interpolation for an ultra-small HD-grade complementary metal-oxide semiconductor (CMOS) video sensor in camera phones that can process 720-p/30-fps videos. Recently, proposed methods with great image quality perceptually reconstruct the green component and then estimate the red/blue component using the reconstructed green and neighbor red and blue pixels. However, these methods require the bulky memory line buffers in order to temporally store the reconstructed green components. The edge adaptive color interpolation method uses seven or nine patterns to calculate the six edge directions. At the same time, the threshold values are adaptively adjusted by the sum of the color values of the selected pixels. This method selects the suitable one among the patterns using two flowcharts proposed in this paper, and then interpolates the missing color values. For verification, we calculated the peak-signal-to-noise-ratio (PSNR) in the test images, which were processed by the proposed algorithm, and compared the calculated PSNR of the existing methods. The proposed color interpolation is also fabricated with the 0.18-${\mu}m$ CMOS flash memory process.

• 보존과학연구
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• 통권6호
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• pp.48-57
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• 1985

This report described the corrosion structure of excavated iron artifacts in terms of simple model based on the knowledge of the corrosion process. (Fig.1)(Table 1,2)In storing the objects, there are basically three ways in which they either break in wedges, flakes and dish-shaped flakes. Completely mineralized objects or those with only a small iron core tend to break into wedges and more solid objects either split small dish-shaped flakes or large flat ones.(Fig. 2,3,4)There are two ways, therefore, to prevent this from happening. One is to keep the artifacts rigorously dried in Silica-gel, never allowing the relative humidity to rise. This is feasible which the artifacts are in store but causes great difficulty if they are wanted for museum display. Because they still contain $ FeCl _2$ they are always at risk ; they contain the seeds of their own destruction. The other alternative is to use of washing process to dissolve out the $ FeCl _2$. In this connection, many different methods to stabilize the artifact have been employed; boiling iron in frequent changes of water, soaking in Na-sesquicarbonate solution, soaking in alkaline Na-sulphite solution. In this report, introduced the alkaline sulphite method by the N.A. North and C.Pearson.Finally, Let me extend my thanks to Ancient Monument Lab., Museum of London Conservation Lab., British Museum Conservation Div. and National Maritime Museum Conservation Lab. who have helped me and made many valuable suggestions.

• The International Journal of Costume Culture
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• 제13권2호
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• pp.93-100
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• 2010

The business strategies of small to medium enterprises (SMEs), especially in relation to the Japanese apparel wholesaler and apparel manufacture markets, have been undertaken by Urakami and his colleagues (Komiya et al., 2009; Urakami et al., 2009; Urakami & Wu 2010). The aim now is to investigate the changing business climate of apparel products in Asia, now that China seems to a major player of apparel products in the Asian region. The production of apparel products from China has resulted in a major shift of the business environment. Such products have now invaded import markets throughout the world economies. Such a drastic change in the business environment impacts the structure of distribution channels in competing economies, affecting both wholesalers and manufactures. This research focuses on the effects this has had on the Japanese distribution channels. The findings derived from our previous research are highlighted, together with several planned hypotheses that require testing, in order to build a clearer understanding of apparel manufacturing in the Asian region.

• 한국의류학회지
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• 제38권2호
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• pp.175-190
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• 2014

This study analyzes the business strategy of fast fashion through Zara, a successful fashion brand from Inditex Spain. An in-depth case approach is adopted based on extensive secondary research that includes literature and press releases published in Korean as well as English. The findings of this research demonstrate a speedy and flexible process occurring in the supply chain of its fast fashion business and the cooperation between the company's headquarters and international subsidiaries. Zara's headquarters executes four representative strategies: competitive market research, an integrated organizational structure, small quantity batch production, and a specialized distribution system. Zara's international subsidiaries execute their own four representative strategies: differentiated international expansion, independent human resource management, small but fundamental IT, and maximization of store resources. These two core parts intimately work together to satisfy target customers all over the world by bringing competitive advantages to the fashion business and represent a key concept of Zara's business strategy. The main drawbacks of case studies are limited validity and representativeness restraining the potential for making generalizations. However this case is considered sufficient to provide valuable insight and improve the understanding of operation strategy in fast fashion.

• 복식
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• 제60권10호
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• pp.65-79
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• 2010

Each season, many clothing companies dump small pieces of fabrics left over from making samples. Since fabrics do not decompose easily, this results in environmental pollution. This research was done to discover effective ways to reuse these fabric remnants. As most of these remnants were not large enough for making clothes, fashion accessories was chosen as the design object. Four steps of design development process followed: information research & analysis, prototype design & sample making, market testing, final design decision. After market research and trend analysis, four neck decoration wear -- scarf & muffler(SM). collar & cape(CC), vest & top(VT), and necklace(NE) -- were selected as final product types. 45 designs arose, and 120 items with variations in fabric materials and colors were produced as samples. The three main themes (multiple. reversible, cross) were applied throughout all of the design items. Samples were evaluated from the reactions of the consumers through a 10-day sale at a retail store. Based on the sales record and customers' opinions, five designs from each of the product types SM, CC, and VT were picked out as final designs. In conclusion, fashion accessories turned out to be a more appropriate item to reuse fabric remnants from clothing companies than clothes were, because they necessitate small fabric size and the limitation in fabrics could be compensated with creative design ideas.

• 전기학회논문지
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• 제67권3호
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• pp.391-397
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• 2018

This paper proposes a interpolation error compensation method for PMSM torque control. In PMSM torque control, two dimensions look-up table(2D-LUT) is used for current reference generation due to its stable and robust torque control performance. However, the stored data in 2D-LUT is discreet, it is impossible to store all over the operation range. To reduce the reference generation error in this region, the 2D-Interpolation method is conventionally used, however, this method still remains the error affected by the number of stored data. Besides, in the case stored by fixed unit, this error is increased in field weakening region because of the small number of stored data. In this paper, analyzing the cause of this interpolation error, and compensating the method to reduce this error. Proposed method is verified by the simulation and experiment.

• 한국환경과학회지
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• 제16권2호
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• pp.233-239
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• 2007

In the coastal wetland the mud is consist of fine particles, which means that it is characterized by small gap, and heat transfer is obstructed since moisture is found between the gaps. The relationship between net radiation ($R_N$) and soil heat flux($H_G$) shows a counterclockwise hysteresis cycle, which refer to a time lag behind in the maximal soil heat fluxes. The albedo is independent of seasonal variation of the vegetation canopy which plays very important roles to store and control the heat in the atmospheric surface layer.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2017년도 춘계학술발표대회
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• pp.979-981
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• 2017

최근에는 디지털 미디어 기술의 발달로 다양한 형태의 미디어 서비스가 개발되고 있으며 미디어 콘텐츠의 불법 복제를 방지하고 콘텐츠 제작자의 권리를 보호하기 위해 많은 DRM 기술이 개발되고 있다. 여러 개의 DRM을 사용하려면 DRM 서비스 제공 업체와 콘텐츠 제공 업체가 별도의 계약을 통해 상호 의존적인 방식으로 서비스를 제공해야한다는 제약이 있다. 본 논문에서는 클라우드 기반의 DRM 스토어를 제안한다. 이 시스템은 DRM 서비스 제공 업체가 여러 DRM을 쉽게 등록하고 콘텐츠 제공 업체는 자신의 서비스 특성에 따라 DRM을 필요한 만큼 사용할 수 있는 오픈 마켓 형식의 DRM 중계 서비스이다.