• 전자공학회논문지CI
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• 제46권2호
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• pp.44-51
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• 2009

자연 영상에서의 텍스트 이해는 지난 수년간 매우 활발한 연구 분야로 자리하고 있다. 논문에서 우리는 한국어 간판 영상으로부터 자동으로 텍스트를 인식하는 방법을 제안한다. 제안된 방법은 상호명의 인식을 위한 텍스트 영역의 검출 및 이진화를 포함하고 있다. 먼저 수직, 수평 방향의 에지 히스토그램을 이용하여 텍스트 영역의 정교한 검출을 수행하였다. 두 번째 단계는 검출된 텍스트 영역에 대해서 연결요소 기법을 적용하여 각각의 독립된 한 개의 문자 영역으로 분할되어지고, 마지막으로 최소 거리 분류법에 의해 각각의 글자를 인식한다. 각각의 문자 인식을 위해 모양 기반 통계적 특징을 추출한다. 실험에서 제안된 전체적인 효율성 및 정확성을 분석하였으며, 현재 구현된 모바일 시스템의 실용성을 확인할 수 있었다.

• 복식문화연구
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• 제20권3호
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• pp.347-362
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• 2012

Formatively and artistically aspect, a hybrid can be said to be a phenomenon in which two mutually different genres are combined. Make-up is thought to be very important to arrange the foundation available for predicting and pursuing a flow and direction of future hybrid make-up based on this, by analyzing a flow centering on hybrid trend, which was shown previously. In terms of objectives of this study, the first, aim is to suggest a model for researching make-up by grasping the developmental process and the characteristics of hybrid art through considering an art theory of hybridity, shown in make-up. The second, aim is to design make-up by analyzing trends in make-up style after deconstructing the hybrid genre. The modern make-up design through genre-deconstruction characteristics beyond diverse plurality and genre could be known to be highlighted as aesthetic characteristic by a slight attempt as communication of open space, which connects culture and genre, which had failed to be recognized and was neglected. Empirical research has, produced a work by systematically arranging make-up design. This study, identifies two kind of barrier demolition, such as the class deconstruction and the temporal, spatial disorder centering on genre deconstruction of hybrid. There are infinite possibilities in developing make-up design in line with modern sensation through aesthetic element and symbolic significance through genre deconstruction. It was the expression mode in future make-up, to providing basic data, and to strengthening competitive edge of culture and art.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2004년도 제22회 춘계학술대회논문집
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• pp.713-721
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• 2004

Variable air intake and variable exhaust nozzle of hypersonic engines are designed and tested in this study. Dimensions for variable geometry air intake, ram combustor and variable geometry exhaust nozzle are defined based on the requirements of a pre-cooled turbojet engine. Hypersonic Ramjet Engine is designed as a scaled test bed for each component. Actuation forces of moving parts for variable intake and variable nozzle are reduced by balancing the other force in the opposite direction. A demonstrator engine which includes variable intake and variable nozzle is designed and the components are fabricated. Composite material with silicone carbide is applied for high temperature parts under oxidation environment such as leading edge of the variable intake and combustor liner. Internal cooling structure is adopted for both moving and static parts of the variable nozzle. Pressure recovery and mass capture ratio of the variable intake at Mach 5 is obtained by a hypersonic wind tunnel test. Flow characteristics of the variable nozzle are obtained by a low temperature flow test. Wall temperature and heat flux of the nozzle at Mach 3 is obtained by a firing test. As results, the intake and the nozzle are proved to be used at designed pressure and temperature environment.

• 한국의상디자인학회지
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• 제16권2호
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• pp.139-150
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• 2014

The purposes of this study are to analyze current situation of fashion market of Vietnam who is mainly influenced by Korean wave, analyze preferred fashion brand product and street fashion style of women in 10~20s interested in fashion so much, and develop the design suitable for Vietnamese consumers' preference so as to seek the methods domestic fashion industry can have competitive edge in emerging economic market. It's significant to suggest the direction of Korean new contents and seek the possibility of advancing new market by getting out of domestic market which is stagnated by preparing the foothold of fiber and fashion industry, beyond the first effects of Korean wave. Through this study, current situation of Korean wave which recently becomes new Korean wave based on the K-pop and futhermore, one of worldwide cultural situation could be recognized. Based on the preference of the Korean wave, current situation of Korean fashion industry spread gradually in Vietnam and design characteristics of fashion style preferred by Vietnamese consumers could be grasped. As the result, the design which can satisfy various needs of Vietnamese female consumers preferring fashion style was developed based on the characteristics by product's styles of Vietnamese fashion market. In addition, it intended to be helpful to plan the design of casual wear which is more professional so that Korean fashion industry can advance Vietnamese market through it.

• 한국발생생물학회지:발생과생식
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• 제10권3호
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• pp.193-196
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• 2006

이 연구는 태생경골어인 쏨뱅이의 번식생태학적 기초자료를 제공하고자 체내 자어와 출산 후의 시원생식세포의 출현, 원시 생식소와 난소 분화과정을 조직학적으로 조사하였다. 약 $10\;{\mu}m$의 시원생식 세포는 체내 자어의 초기 소화관과 중심신관 사이 복막에 위치하였다. 출산 후 31일째부터 생식원세포가 생식원기에 도달하였으며, 체세포들이 분열 증식하여 원시생식소를 형성하였고, 출산 후 49일째에 난소강이 형성되기 시작하였으며, 출산 후 60일째에 생식원기의 양쪽 끝에서부터 난소강 형성이 관찰되었다. 출산 후 79일째에는 난소강 안쪽을 따라 생식세포들이 분열 증식하기 시작하였다.

• 한국항공우주학회지
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• 제37권11호
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• pp.1055-1065
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• 2009

경계층 안정성 방정식인 PSE를 이용하여 익형 표면에 형성되는 경계층의 안정성 해석을 수행하였다. 압축성 비점성 유동 해석으로 경계층 가장자리 조건을 얻고, 일반좌표계에서의 압축성 경계층 방정식을 4차 정확도로 계산하여 층류 경계층 유동장을 얻었다. 층류 경계층 데이터를 PSE의 입력으로 하여 안정성 해석을 수행하고 교란의 증폭률을 얻어 안정성 특성을 고찰 하였다. 마하수 0.5의 NACA0012 및 HSNLF(1)-0213 익형에 대한 해석을 수행하여 교란 주파수에 따른 증폭률 및 위치에 따른 교란의 진폭 분포 특성을 파악하였다. 익형의 윗면과 아랫면에서 받음각에 따른 안정성 특성을 각각 증폭률의 크기와 주파수 범위에 대해 분석하였다. 또한 중립안정성 곡선, 마하수에 따른 안정성 특성을 살펴보았으며 익형의 종류에 따른 안정성 특성 차이를 분석하였다.

• 한국항공우주학회지
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• 제40권12호
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• pp.1080-1085
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• 2012

본 논문에서는 작동유의 최대 동점성 계수가 400cSt까지 변하는 조건에서 항공기 도어 댐퍼용 칼날형 댐핑 오리피스를 설계하였다. 전산 유동 해석과 실험을 통하여 칼날 오리피스의 유량계수를 분석하였고, 오리피스의 크기와 칼날 각도, 유동방향, 레이놀즈수가 미치는 영향을 고려하였다. 이 결과를 바탕으로 오리피스의 크기에 따라 댐퍼의 성능 기준을 충족시키기 위해 제한해야 하는 댐퍼의 쿨롱 마찰력 범위를 유도하였다.

• 방송공학회논문지
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• 제17권1호
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• pp.17-25
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• 2012

본 논문에서는 단안 카메라를 이용하여 획득한 여러 장의 영상으로부터 입체영상을 제작하는 방법을 제안한다. 수평으로 이동하며 촬영한 N 장의 프레임 영상중에서 최적의 좌우 입체영상을 먼저 선택한다. 이를 위해 영상의 에지를 추출한 후 에지의 방향을 이용하여 두 영상의 에지각의 차이인 회전각을 구한다. 또한 영상 투영을 통해 두 영상의 상관관계를 구한 후, 이를 이용하여 이동벡터를 얻는다. 다음으로 최적의 입체영상 두 장을 선택한 후, 회전각 및 이동벡터를 이용하여 선택된 좌우영상을 보정한다. 총 32장의 실험영상데이터에 제안방법을 적용하였고, 입체영상의 품질을 검증하기 위해서 주관적 시각적 피로도 평가를 수행하였다. 피로도 측면에서는 84 %의 안정적인 입체감을 전달하는 것을 증명하였다.

• 대한기계학회논문집B
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• 제20권6호
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• pp.1931-1940
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• 1996

The effect of periodic passing wake on the film-coolant flow issuing normally from a flat plate was investigated experimentally. The passing wake was generated by rotating thin circular bars. Depending on the rotational direction the test plate could be simulated as a pressure surface or a suction surface of a gas turbine blade. The phase-averaged velocity components were measured using an X-type hot-wire probe. The Reynolds number based on the free-stream velocity and injection hole diameter was 23, 500 and the velocity ratio which is the ratio of film coolant velocity to free-stream velocity was 0.5. The velocity-triangle induced by the wake was similar to that induced by the one generated at the blade trailing edge. The vertical velocity component induced by the passing wake, which approaches to the suction surface and moves away from the pressure surface, played a dominant role in the variation of the flow field. The variation in the phase-averaged velocity on the pressure surface was greater than on the suction surface, but the turbulence kinetic energy variation on the suction surface appeared larger than on the pressure surface.

• 한국식품영양학회지
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• 제20권3호
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• pp.295-303
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• 2007

As a result of life-style changes, consumer's concerns of food have shifted from calories and nutrition to health and convenience. Fresh-cut products are one such new direction for fruit and vegetable consumption. In this study, the vitamin C, mineral, and pesticide contents of various fresh-cut products were analyzed. According to sensory evaluations, the key reason for a lower than expected overall acceptability of many fresh-cut products is that they are likely to have browning and can easily lose their freshness. Also, the sensory evaluation showed that shriveling, the degree of browning, softening around the cut edge, and off-flavors were the primary factors affecting the quality of fresh-cut products. As a nutritional factor of quality, vitamin C content was not practical with regard to fresh-cut lettuce because the level was very low. For product safety, residual pesticides were detected in the fresh-cut products, but the results showed that all items were under permitted levels and considered safe. In evaluation of the microbial levels of the fresh-cut market products, the levels of viable cells, mold, yeast, coliform bacteria, and enterobacteriaceae were not significantly different based on the summer and winter seasons. The levels of S. aureus and Listeria spp. in the products were higher during the summer season than the winter.