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        • KCI등재

          $PbO-B_2O_3$ 플럭스에 의해 성장한 루비단결정의 특성평가

          조민희,서진교,안용길,박종완,Cho, Min-Hee,Seo, Jin-Gyo,Ahn, Yong-Kil,Park, Jong-Wan 한국결정성장학회 2009 韓國結晶成長學會誌 Vol.19 No.4

          기존의 합성방법에 사용되는 백금 도가니의 단점을 보완할 수 있는 알루미나 도가니를 사용하여 천연 및 기존의 합성루비와 유사한 적색의 투명한 결정을 성장시켰다. $PbO-B_2O_3$ 가 흔합된 플럭스를 사용하여 $915{\sim}1350^{\circ}C$의 온도에서 약 240시간 실험 후 최대 9.02 ${\times}$ 6.36 mm 투명한 적색의 결정이 성장되었다. 이 결정을 보석학적 기초검사를 통하여 굴절률, 내포물, 비중 등의 특성과 FT-IR, UV-VIS spectrometer 및 XRD 를 사용하여 기존의 합성루비 및 천연루비의 특성과 비교분석하였다. In this study, ruby single crystals were successfully grown by flux method using an alumina crucible. The alumina crucible can be a substitute for the platinum crucible of high price. The ruby single crystals were grown in the temperature range of $915{\sim}1350^{\circ}C$ for 240 h, using $PbO-B_2O_3$ mixture. The grown ruby crystals with 9.02 ${\times}$ 6.36 mm in size exhibited red color and were transparent. The optical and structural properties were examined by UV-VIS spectrometry, FTIR and XRD. The optical properties of theses crystals were similar to those of the natural ruby and synthetic ruby grown by other methods.

        • KCI등재

          유방염 우에서 원인균분리 및 sulfadimethoxine sodium 투여 후 혈청 및 유즙내 잔류량 추이

          조민희 ( Min Hee Cho ),도재철 ( Jae Cheul Do ),송희종 ( Hee Jong Song ),정종식 ( Jong Sik Jyeong ) 한국가축위생학회 2001 韓國家畜衛生學會誌 Vol.24 No.1

          This study was carried out to identify causative agents from california mastitis test(CMT) positive mastitic milk, and to examine the antimicrobial susceptibility of 50 heads in Seongju and Chilgok area of Gyeongbuk province. Sulfadimethoxine sodium(SMS) was intramuscularly administered once to four mastitis infected dairy cattle at the rate of 10mg/kg body weight. After injection of SMS, the depletion rate of serum and milk from the cattle were periodically measured for five days. The CMT positive number from 50 heads showed 46% and that of 200 quarters was 47(23.5%). From 39 quarters of 47 heads 39 different microorganisms were identified. These organisms were classified into 12 species: Staphylococcus aureus 8(20.5%), Sta haemolyticus 6(15.4%), Streptococcus bovis 4(10.3%), Sta hyicus 3(7.7%), Sta epidemidis, Sta xylosus, Sta sciuri 2(5.1%), Str agalactiae 2(5.1%), Escherichia coli(10.3%), three Enterobacter cloacae(7.7%), two Ent aerogenes(5.1%) and one Salmonella spp(2.6%).

        • KCI등재

          연구논문 : 눈썹의 변화에 따른 동안효과

          조민희 ( Min Hee Cho ),박길순 ( Kil Soon Park ) 한국미용학회 2013 한국미용학회지 Vol.19 No.3

          The purpose of the study is to set up a specific standard of the factors and to find the factor of the eyebrows point make-up for the baby face. In this research, the focus of study is on the eyebrow in the baby face point make-up. In this study, the main method of the research is the survey. For the purpose of the study, the questionnaire is composed of models that show the image of the various eyebrows and items that measure the baby face effect. In this study, we can infer with the study that the straight line, shorter than the standard, thick, and dull color makes the baby face image. The meaning of the study is to set up a specific standard of the factors and to find the factor of the eyebrows point make-up for the baby face. The findings can be su mmarized as follows:First, the eyebrow shape that made one look the youngest was the straight line shape with 9 mm thickness and 4 mm length. The average thickness of women s natural eyebrow was 8 mm, thus making it 1 mm thicker into 9 mm makes one look younger. Second, for the point make-up focusing on baby face effect, the eyebrow make-up was a very significant factor. The ones who were knowledgeable about baby face make up was more aware of the importance of eyebrow expression than the ones who were not knowledgeable.

        • KCI등재

          한국 황해 백령도 주변해역 후 제4기 퇴적작용

          조민희 ( Min Hee Cho ),이은일 ( Eun Il Lee ),유학렬 ( Hak Yoel You ),강년건 ( Nyen Gun Kang ),유동근 ( Dong Geun Yoo ) 한국지구물리·물리탐사학회 2013 지구물리와 물리탐사 Vol.16 No.3

          황해 백령도 주변해역에 분포하는 해저면 연계퇴적층의 음향상 연구를 위해 고해상 탄성파 탐사자료를 분석하였다. 해저지형 및 내부 음향상 특징에 의하면 연구지역에 분포하는 천부퇴적층은 총 7개의 음향상으로 구분된다. 내부 반사면이 약간 혹은 양호하게 발달하거나 내부반사면을 전혀 수반하지 않는 평탄한 해저면(음향상 1-1, 1-2)은 연구지역의남쪽에 주로 분포한다. 파형의 표면구조를 수반하는 평탄한 해저면(음향상 1-3)은 중부해역에 발달한다. 평탄한 해저면 혹은 파형의 표면구조를 수반하는 마운드 형태의 해저면 특징(음향상 2-1, 2-2, 2-3)은 중부해역에 분포한다. 내부 반사면이발달하지 않고 불규칙한 침식흔적을 갖는 해저면(음향상 3-1)은 조사해역의 북부해역인 백령도 외해쪽에 주로 존재한다.음향상의 분포 및 퇴적물 특성에 의하면 연구지역의 퇴적환경은 뚜렷한 3 지역으로 구분되는 바 (1) 강한 조류의 영향으로 심한 침식작용이 진행되고 있는 북쪽지역, (2) 해수면 상승과 연계된 조류의 영향으로 형성된 사퇴가 분포하는 중부해역, (3) 박층의 해침 사질층이 분포하고 있는 남부해역 등으로 구성된다. 연구지역에 분포하는 7 음향상을 포함하는 이와 같은 퇴적층은 홀로세 해침동안 해수면 상승 및 강한 조류와 연계된 퇴적작용을 반영한다. High-resolution chirp profiles were analyzed to investigate the echo types of near-surface sediments in the Yellow Sea off the Baegryeong Island. On the basis of seafloor morphology and subbottom echo characters, 7 echo types were identified. Flat seafloor with no internal reflectors or moderately to well-developed subbottom reflectors (echo type1-1 and 1-2) is mainly distributed in the southern part of the study area. Flat seafloor with superposed wavy bedforms(echo type 1-3) is also distributed in the middle part. Mounded seafloor with either smooth surface or superposed bedforms (echo type 2-1, 2-2, and 2-3) occurs in the middle part of the study area. Irregular and eroded seafloor withno subbottom reflectors(echo type 3-1) is present in the northern part of the study area off the Baegryeong Island. According to the distribution pattern and sedimentary facies of echo types, depositional environments can be divided into three distinctive areas: (1) active erosional zone due to strong tidal currents in the northern part; (2) formation of tidal sand ridges in response to tidal currents associated with sea-level rise distributed in the middle part; and (3) transgressive sand sheets in the southern part. Such a depositional pattern, including 7 echo types, in this area reflects depositional process related to the sea-level rise and strong tidal currents during the Holocene transgression.

        • 태양광자동차의 발전모듈 온도 특성에 따른 최적 설계 기술

          조민희 ( Min Hee Cho ),윤진원 ( Jin Won Yoon ),김건용 ( Gun Yong Kim ),허재원 ( Jae Won Huh ),이지수 ( Ji Soo Lee ),황현창 ( Hyun Chang Hwang ),이계복 ( Kye Bock Lee ),이석호 ( Soek Ho Rhi ) 충북대학교 산업과학기술연구소 2014 산업과학기술연구 논문집 Vol.28 No.2

          Solar cars combine technologies typically used in the alternative energy and automotive industries. The design of a solar vehicle is severely limited by the amount of supplied solar energy input into the car. Currently, most solar cars have been built for the purpose of solar car racing or prototyping of solar energy usage. But in the present study, solar car designed with given solar cells was investigated in terms of daily irradiation, cell temperature and geometrical characteristics to improve the solar power generation and the driving efficiency. Mainly driving power of solar car depends on the performance of photovoltaic cells to convert sunlight into electricity. Unlike solar thermal energy which converts solar energy to heat for either household purposes, industrial purposes or to be converted to electricity, PV cells directly convert sunlight into electricity. Present solar car system``s power output was affected by module inclination and module temperature. Intensity of solar irradiation depending on time was also severely depending on the position of sun. Decreasing cell temperature leads to increase power generation.

        • KCI등재

          구문 다양성 해소를 위한 복합명사구 색인 방법

          조민희(Min-Hee Cho),정도헌(Do-Heon Jeong) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.3

          복합명사구는 단일어보다 명확한 의미를 갖기 때문에 의미적 정보처리에서 중요한 요소로 사용된다. 하지만 명사구의 표현형태의 다양성 때문에 같은 의미를 갖고 있다 할지라도 그 동일성을 판단하기 어렵다. 이에 본 연구에서는 이러한 구문 다양성 해소를 위해 복합명사구 색인 방법을 제안한다. 본 연구의 최종 목적은 다양한 형태로 표현된 동일한 의미의 명사구를 동일한 형태의 색인어로 표현하는 것이며, 이를 위해 다음과 같은 과정을 따른다. 먼저 복합명사구 인식을 위한 규칙 템플릿을 생성하고, 국내학술논문 집합에 적용하여 복합명사구들을 추출한다. 일반적으로 복합명사구는 특정성이 크다. 이에 이를 고려한 색인어 합성규칙을 제안하고, 추출된 명사구에 적용한다. 본 연구의 성능을 객관적으로 평가하기 위해 HANTEC 2.0 테스트셋을 이용하였으며, 그 결과를 기준모델과 비교하였다. 실험과 비교를 통해 본 논문에서 제안하는 색인방법이 검색 정확률 향상에 긍정적으로 영향을 미치며, 정보검색의 성능을 향상시킬 수 있음을 확인하였다. Compound noun phrase (CNP) is important factor for semantic information process because the meaning of the CNP is more disambiguous than that of single word. However, the CNP can be expressed in various types even though it expresses same meaning. It is called syntactic diversity. It makes information system difficult to grasp sense identity. In order to resolve the syntactic diversity in this research, we propose an indexing method for compound noun phrase. The main purpose is to make identical index term for various types of CNPs which has same meaning. To do so, the research follows next steps. For the first, we make rule template and utilize the template to extract CNPs from set of domestic research papers. In general, the CNP has a unique meaning. Considering the characteristic, we suggest synthesis rules of index terms and apply the rule to CNPs extracted in previous step. For the objective performance evaluation of the research, a test set, HANTEC 2.0, was utilized and the result was compared to baseline model. Through the experiment and the evaluation, we have confirmed that the indexing method suggested in this paper could positively affect retrieval precision and improve performance of the information retrieval.

        • KCI등재

          클라우드 컴퓨팅 환경에서 다중 SSO를 활용한 사용자 인증 기술

          조민희(Min-Hee Cho),장은겸(Eun-Gyeom Jang),최용락(Yong-Rak Choi) 한국컴퓨터정보학회 2016 韓國컴퓨터情報學會論文誌 Vol.21 No.4

          The interface between servers and clients and system management in the cloud computing environment is different from the existing computing environment. The technology for information protection. Management and user authentication has become an important issue. For providing a more convenient service to users, SSO technology is applied to this cloud computing service. In the SSO service environment, system access using a single key facilitates access to several servers at the same time. This SSO authentication service technology is vulnerable to security of several systems, once the key is exposed. In this paper, we propose a technology to solve problems, which might be caused by single key authentication in SSO-based cloud computing access. This is a distributed agent authentication technology using a multiple SSO agent to reinforce user authentication using a single key in the SSO service environment. For user authentication reinforcement, phased access is applied and trackable log information is used when there is a security problem in system to provide a safe cloud computing service.

        • KCI등재

          보문 : 동안 이미지 연출을 위한 얼굴관리 및 시술 경험에 관한 연구

          조민희 ( Min Hee Cho ),양진희 ( Jin Hee Yang ) 대한미용학회(구 대한미용과학회) 2015 대한미용학회지 Vol.11 No.1

          In this study, a survey was administered to women in their 20s to 50s in order to assess their experiences with medical procedures for the baby-face image effect, as well as their interest in baby-face effect cosmetics. With regard to the preferred image dependent on the perceiver’s characteristics, study results revealed that a natural image was the most preferred across the entire age spectrum. Differences across the age ranges were detected and showed that a sexy image was the most preferred amongst women in their 20s, while a natural image was the most preferred amongst women in their 30s, 40s, and 50s. The analysis of frequencies in receiving face management and medical procedures for a baby-face effect indicated that skin care was the most often received (n=160, 38%), followed by baby-face cosmetics (n=107, 25.4%). Additionally, 70 respondents (16.9%) had received Botox, 50 (11.9%) received fillers, 28 (6.7%) received self-fat implants, and five (1.2%) had received dark-circle removal services. Results also indicated a relationship between younger age and greater experience in receiving baby-face cosmetics, reflecting a tendency amongst women in their 20s to value this trend. Furthermore, women in the higher age spectrum possessed the most experience in medical procedures and skin care, revealing the importance they placed on the health of the skin itself, as opposed to more ostentatious image adjustments. With regard to the effects of appearance on their interest in baby-face cosmetics, women in their 40s considered skin appearance as most important, while women in their 30s considered lip appearance as most important, thus presenting a significant contrast in the age spectrum. These results revealed differences between the received forms of baby-face image augmentation and interest in this image, which were dependent on the characteristics of the receiver. Such results are anticipated to be used as practical guidelines in future considerations of how best to affect the baby-face image.

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