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광도파로 소자 제작을 위한 레이저 리소그래피 장치 (Laser lithography system for the fabrication of optical waveguides)

  • 박경현;변영태;김명욱;김선호;최상삼;조욱래;박승한;김웅
    • 한국광학회지
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    • 제8권2호
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    • pp.169-173
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    • 1997
  • 가로.세로의 비가 큰 광도파로 소자 제작용 마스크 제작에는 레이저 리소그래피 장치가 기존의 리소그래피 장치에 비해 비용면 등을 고려하면 많은 장점을 가지고 있다. 레이저 리소그래피 장치를 이용 보편적인 양극형 마스크는 물론 기존의 레이저 리소그래피 장치로는 제작하기에 많은 어려움이 있는 음극형 마스크를 포토레지스트의 인위적 변화를 이용 제작할 수 있었다. 제안된 방법은 주변환경 즉 먼지, 장치의 진동 그리고 레이저 입사광 변화 등에 기존의 장치 보다 덜 민감함을 실험적으로 확인하였다. 이 방법을 이용 광도파로 소자의 기본을 이루는 S형태 곡선으로 구성된 광분배기 패턴을 제작하였으며, 제작된 패턴의 대비 및 재현성에 있어서 그 특성이 매우 우수함을 실험적으로 확인하였다.

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칼라와 에지 히스토그램 기술자를 이용한 영상 마이닝 향상 기법 (The Usage of Color & Edge Histogram Descriptors for Image Mining)

  • 안성옥;박동원
    • 컴퓨터교육학회논문지
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    • 제7권5호
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    • pp.111-120
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    • 2004
  • 영상의 칼라, 텍스쳐, 오브젝트의 형체 등과 같은 하위 수준의 특징을 표현할 수 있는 기술자를 MPEG-7 표준에서 규정하고 있다. 하지만, 각각의 기술자를 따로 분석함으로써는 성능 향상에 불충분한 점이 있었다. 본 논문에서는 칼라 기술자와 텍스쳐 기술자를 결합하여 영상검색의 성능을 향상시키는 방법을 제안한다. MPEG-7 표준에서 정의한 $l_{1}$-norm방법보다, 본 논문에서는 칼라 히스토그램의 경우 코사인 근사도 계수를, 에지 히스토그램의 경우 유클리디언 디스턴스를 적용 실험하여 진일보한 결과를 도출할 수 있었다.

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BMI에 따른 요골동맥의 혈관특성과 부/침맥과의 상관관계 연구 (The Study for Correlation Characteristics on Radial Artery and Floating/sinking Pulse with BMI)

  • 이유정;이전;이혜정;김종열
    • 한국한의학연구원논문집
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    • 제14권3호
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    • pp.121-126
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    • 2008
  • Pulse diagnosis refers to the process of diagnosing a patient by feeling an artery on the wrist based on the shape that the pulse take s while the hold-down pressure increase. The styloid process artery on the wrist is usually felt, and the pulse is taken on Chon, Gwan and Cheok using three fingers. This study is to examine the structural difference in the location of pulse diagnosis by measuring and analyzing blood diameter, blood depth, and blood flow velocity of the location of pulse diagnosis by using ultrasonic wave (VOLUSION730 PRO, GE Medical, U.S.A). This study also attempted to grasp whether the characteristics of blood vessels differ depending on Body Mass Index (BMI) and analyzed their correlation with Oriental medical pulse diagnosis. The male subjects without cardiovascular diseases were divided into the normal BMI group, the underweight group and the overweight group and 10 people of each group were measured, Blood depth, blood diameter and blood flow velocity at the location of pulse diagnosis (Chon, Gwan, Cheok) of the wrists of left and right hands were measured and the pulse wave was measured by using pulse diagnosis instrument (3-D Mac, DaeyoMedi, Korea).The results of this study showed that the characteristics of blood vessels differ depending on the degrees of obesity, and the characteristics of floating pulse and sinking pulse of Oriental medical pulses were related to the degrees of obesity. This shows that the characteristics of the blood vessels of subjects and BMI information are the major indicators for diagnosis and are the matters that must always be considered when developing the algorithm of pulse diagnosis.

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게이트 어레이 레이아웃 형태에서의 기능 모듈 편집기의 구현 (An Implementation of Functional Module Editor inthe Gate-Array Layout Style)

  • 홍성현;정영숙;임종석;손진우
    • 한국정보처리학회논문지
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    • 제3권5호
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    • pp.1240-1252
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    • 1996
  • 본 논문에서는 게이트 어레이 레이아웃 형태에서 디지털 회로를 보다 발전적 인 방식으로 설계하도록 하는 기능 모듈 구현 전용 편집기를 제안한다. 구현된 편집기 에서의 기능 모듈 설계 작업은 전반적으로 설계자와의 대화 형식으로 이루어진다. 따라서, 설계자는 빠른 시간 내에 모듈을 설계할 수 있고 보다 만족스런 레이아웃 결과를 얻을 수 있다. 특히, 본 편집기에서는 IC원판을 구성하는 기초셀 형태에 대해 독립적이며, 배치및 배선 작업 시에 수동과 반자동 방식을 함께 사용할 수 있다는 특징이 있다. 또한 기존의 툴에서는 제공되지 않는 다양한 기능들이 추가되어있어 더욱 효율적으로 모듈 생성을 할 수 있다. 본 편집기는 X- 윈도우 Motif 환경하에서 C언어로 구현되었으며, 그 기능을 기존의 레이아웃 시스템인 Seadali를 사용했을 때와 비교하여 성능을 평가하였다. 구현한 편집기를 이용하면 설계 시간을 두 배정도 단축시킬 수 있다.

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Jean Michel Basquiat의 그래피티(Graffiti)를 응용한 패션페인팅 (The Application of Jean Michel Basquiat's Graffiti to Fashion Painting)

  • 장애란;고은숙
    • 대한가정학회지
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    • 제44권6호
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    • pp.23-34
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    • 2006
  • Graffiti has been recognized as an art form since the influence of free, black culture and Neo-Expressionism in the 1980s, though Graffiti remains the subject of controversy both inside and outside the school Modem Art. Jean Michel Basquiat is the most famous Graffiti artist of the '80. He was regarded as the genius and star of American art, leaving a lot of experimental and creative works during his short, 9-year, creative period. In his works, Basquiat well expressed the isolated and dark shadows in the U.S., the pursuit of self identification, the purpose of expression and the epochally social phenomenon. The purpose of this study is to investigate the application of Jean Michel Basquiat's Graffiti to fashion painting. To achieve this purpose, we present a lot of fashion painting works which apply Jean Michel Basquiat's Graffiti by focusing on autographic experience, racialism, cartoon themes, monely value, and anatomical death in the characteristics of Basquiat's works. Through this process, we can express and apply Basquiat's Graffiti to fashion painting by analogizing the themes and modeling the methods of his works, such as childish and simple features, intentionally wrong spellings and sentences, and symbols of death including skeletons, intestines, bones and teeth. In addition, Basquiat's techniques are examined in this study, including the representational handling of a brush, primitive and strong colors, and maximized shape. This study found that fashion painting can juxtaposes art and fashion by expressing Jean Michel Basquiats' Graffiti.

Mixotrophic 배양조건에 따른 Euglena gracilis의 성장과 지질에 미치는 영향 (Effect of Growth Conditions on the Biomass and Lipid Production of Euglena gracilis Cells Raised in Mixotrophic Culture)

  • 정우철;최종국;강창민;최병대;강석중
    • 한국수산과학회지
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    • 제49권1호
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    • pp.30-37
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    • 2016
  • Microalgae are functional foods because they contain special anti-aging inhibitors and other functional components, such as ecosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and omega-3 polyunsaturated fatty acids. Many of these functional dietary components are absent in animals and terrestrial plants. Thus, microalgae are widely utilized in human functional foods and in the feed provided to farmed fish and terrestrial livestock. Many marine organisms consume microalgae, often because they are in an appropriate portion of the cell size spectrum, but also because of their nutritional content. The nutritional requirements of marine organisms differ from those of terrestrial animals. After hatching, marine animals need small live forage species that have high omega-3 polyunsaturated fatty acid contents, including EPA and DHA. Euglena cells have both plant and animal characteristics; they are motile, elliptical in shape, 15-500 μm in diameter, and have a valuable nutritional content. Mixotrophic cell cultivation provided the best growth rates and nutritional content. Diverse carbon (fructose, lactose, glucose, maltose and sucrose) and nitrogen (tryptone, peptone, yeast extract, urea and sodium glutamate) supported the growth of microalgae with high lipid contents. We found that the best carbon and nitrogen sources for the production of high quality Euglena cells were glucose (10 g L–1) and sodium glutamate (1.0 g L–1), respectively.

배양방법에 따른 Euglena gracilis의 성장 및 지방산 조성 (Effects of Culture Methods on the Growth Rates and Fatty Acid Profiles of Euglena gracilis)

  • 정우철;최종국;강창민;최병대;강석중
    • 한국수산과학회지
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    • 제49권1호
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    • pp.38-44
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    • 2016
  • The quality and quantity of live food sources strongly influence the success of fish production in farming operations. Thus, critical studies of live forage species are a crucial element for progress in fish aquaculture. The fat content of food is an especially important determinant of growth in marine fish. Omega-3 highly unsaturated fatty acids (HUFA) are essential components of diet that determine the nutritional value of larval fish. Euglena is a protist that has potential as a forage species. These single-celled organisms have plant and animal characteristics they are motile, elliptical in shape and 15–500 μm in diameter. Their nutritional content is excellent, but most studies have focused on cells raised in autotrophic culture. We therefore examined differences in the lipid and fatty acid contents, and the growth of Euglena cells grown under autotrophic, heterotrophic, and mixotrophic conditions. Biomass production reached 15.03 g/L, 12.28 g/L, and 3.66 g/L under mixotrophy, heterotrophy, and autotrophy, respectively. The proportional n-3 HUFA content differed among culture methods: 10.04%, 5.80% and 10.01% in mixotrophic, heterotrophic and autotrophic cultures, respectively. Mixotrophy was to be the best form of cultivation for improving the growth and nutritional content of Euglena.

한국산 Megalaspis cordyla와 Champsodon snyderi(농어목 어류) 2 미기록종 (New Records of two species, Megalaspis cordyla and Champsodon snyderi(Pisces : Perciformes) from Korea)

  • 김용억;강충배;김진구;안건;명정구
    • 한국어류학회지
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    • 제7권2호
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    • pp.101-108
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    • 1995
  • 전갱이과(科), Carangidae에 속하는 Megalaspis cordyla와 Champsodontidae에 속하는 Champsodon snyderi가 처음으로 우리나라의 남해안에서 채집되었기에 이를 보고한다. Megalaspis cordyla는 전갱이과(科) 어류의 다른 속(屬)들과 형태적으로 유사하나 모비늘의 유무와 모비늘의 시작부위 및 그 형태, 그리고 가슴지느러미의 길이 등에서 잘 구별된다. 따라서 Megalaspis 속(屬)의 국명은 "고등가라지속(屬)"으로, Megalaspis cordyla의 국명은 "고등가라지"로 명명한다. Champsodontidae에 속하는 Champsodon snyderi는 C. capensis와 형태적으로 닮아 있지만, 가슴지느러미의 수와 뺨 부위의 비늘의 유무에 의해, C. longipinnis와는 등지느러미 극조부의 흑색소포의 유무에 의해, C. guentheri와 C. machaeratus와는 새파수와 등지느러미의 연조수에 의해 구별된다. Champsodontidae의 국명은 "악어치과(科)"로, Champsodon 속(屬)의 국명은 "악어치속(屬)"으로, 그리고 Champsodon snyderi의 국명은 "악어치"로 명명한다.

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천인상응(天人相應)의 관점에서 바라본 "황제내경(黃帝內經)"의 인체관 연구 (Study on the Perception of the Human Body in "Huangdineijing" Viewed from the Perspective of the Correspondence between Nature and Human)

  • 임채광
    • 동의생리병리학회지
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    • 제26권6호
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    • pp.855-863
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    • 2012
  • The organic and holistic recognition method about nature in east asian philosophy is also applied to the study of the human body in Korean medicine. In Korean medicine, the human body is being understood from a holistic point of view rather than a mechanical or reductive one. The main east asian philosophies are the heavens thought and the Yin-yang/Five Phase Theory. This study will explore the influence the general flow of heavens thought has on explaining the human body in Korean medicine and the formation of how the human body is perceived in "Huangdineijing"(黃帝內經). First, the primitive meaning of heaven was developed to include the natural heaven of Xia (夏), the lord heaven of Shang(商) and the moral heaven of Zhou(周) dynasties. Among these, the natural heaven notion of the Xia(夏) dynasty which recognized heaven as the one with the power to create everything. This was followed by Taoism which established the contrasting system of heaven and earth. Based on this, "Huangdineijing"(黃帝 內經) developed the perception of the human body, taking into account, heaven as the original substance to generate the human body through the mutual sympathy between heavenly energy and earthly form. The perspective of the correspondence between nature and human in "Huainantzu"(淮南子) and "L$\breve{u}$shichunqiu"(呂氏春秋) was succeeded by Tung Chung-Shu(董仲舒). Based on this development, the perception of the human body in "Huangdineijing"(黃帝內經) is related to the seasonal cycle and the notion of night and day to balance the physiology of the human body. It recognizes that its structure, shape, emotional state and physiological actions are correlated with heaven.

변형 Sol-Gel 방법을 이용한 고온가스로 핵연료 미세구입자 제조 (HTGR Nuclear Fuel Microsphere Preparation Using the Modified Sol-Gel Method)

  • 정경채;김연구;오승철;조문성
    • 한국세라믹학회지
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    • 제46권6호
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    • pp.574-582
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    • 2009
  • $UO_2$ microsphere particles, core material of HTGR(High Temperature Gas Reactor) nuclear fuel, were prepared using by the GSP(Gel Supported Precipitation) method which is a modified-method of the wet sol-gel process. The spherical shape of initial liquid ADU droplets from the vibration nozzle system was continuously kept till the conversion to the final $UO_2$ microsphere. But the size of a final $UO_2$ microsphere was shrunken to about 25% of an initial ADU droplet size. Also, we found that the composition of dried-ADU gel particles was constituted of the very complicated phases, coexisted the U=O, C-H, N-H, N-O, and O-H functional groups by FT-IR. The important factors for obtain the no-crack $UO_2$ microsphere during the thermal treatment processes must perfectly wash out the remained-$NH_4NO_3$ within the ADU gel particle in washing process and the selections of an appropriate heating rate at a suitable gas atmosphere, during the calcining of ADU gel particles, the reducing of $UO_3$ particles, and the sintering of $UO_2$ particles, respectively.