• 한국전자파학회지:전자파기술
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• 제8권2호
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• pp.66-74
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• 1997

현재 세계 대부분의 나라에서 사용하는 국제단위계는 우리가 그동안 미터법이라고 부르던 단위계가 현대화 된 것이라고 보면 된다. 이 국제단위계를 보통 'SI'라고 하는데 이는 불어 Le Sys- teme International d'Unites에서 온 약어로 국제 공통으로 이렇게 표시하기로 했다. 즉 이 단위계의 이름을 우리나라 말로는 '국제단위계'이지만 영어로는 'The International System of Unit's로 표시 하는 등 각 나라마다 다를 수 있으나 전 세계 모든 나라가 공통으로 'SI'라고 부르기로 한 것이다. 국제단위계(SI)의 시초는 1790년경 프랑스에서 발명된 '미터계'이며, 이 미터계는 1875년 17개국 이 미터협약(Meter Convention)에 조인함으로써 공시화되었다. 이 미터계로부터 분야에 따라 여러 개의 하부 단위가 생겼으며 이에 따라 많은 단위들이 나타나게 되었는데, 그 한 예가 1881년 과학분 야에서 사용하기 위해 만든 CGS계이며, 이는 센티미터, 그램 및 초에 바탕을 두고 있다.

• 동력기계공학회지
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• 제4권1호
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• pp.74-80
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• 2000

This present study was investigated effect of Ni contents on the high temperature strength characteristic in 9Cr ferritic heat-resistant steel added 1.7%W in place of Mo in order to restraint laves phase formation. Precipitation amount of carbide, number of particle per unit area and particle size of carbide were decreased with increase of Ni content. In the steels, carbides of $M_{23}C_6$ type was mainly precipitated, but laves phases could not precipitated. Tensile and yield strength, creep strength and creep rupture time was decreased, but elongation were increased due to decreasing of particle number per unite area and carbide amount precipitated with increase of Ni content.

• 한국의사학회지
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• 제15권1호
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• pp.199-212
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• 2002

"East and West Medicine Research Society Monthly View" was published 7 times to revive and develope the Eastern medicine that was in downward trend with an "review the old and learn the new" attitude to unite the East and West medicine. This magazine was lead by the East and West Medicine Research Society and therefore an academic magazine. Its contents mostly consist of lecture type serials. This is because the purpose of the magazine was to reeducate physicians of the Chinese school or to educate the people who had purpose on medicine. The contents of "East and West Medicine Research Society Monthly View" has many serials on various subjects such as Eastern Medicine, Western Medicine, East and West Medicine, and SaSang medicine. Puting in articles about hygiene to put in many writings about living health shows the effort in trying to treat epidemics with Korean Medicine.

• 통상정보연구
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• 제6권2호
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• pp.385-400
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• 2004

China has pegged its currency to the US dollar (at RMB 8.3 to the dollar) since 1994. The yuan's dollar peg has increased demand for chinese exports, which account for about a third of gross domestic product. The peg has also helped to attract $308 billion in foreign investment. But there has been criticism that China has over the past two years been engaging in protracted, large-scale intervention in one direction in exchange markets. According to many reports, RMB is undervalued by somewhere between 15 and 30% by manipulation. China may not want to float the currency at once, since doing so would have a dramatic and negative effect on the economy. However, there has so far been strong pressure from trading partners including the Unite States, Japan, EU. Considered all these things, China may eventually allow some changes in the Yuan's value. This may come in the form of widening a band of movement for the currency, rather than letting it float freely in the market.

• 한국가정과교육학회지
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• 제9권2호
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• pp.17-30
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• 1997

Purpose of this study is to analyze the validity of textbook content on practical arts for the 6th curriculum, to grasp the content problems and to propose the strategy of reformation to be satisfied with consumer better than supplier. The data collected from 196 elemantary school teachers who lived in Gyungsang-namdo and analized by SPSS/PC(sup)+ package program. The statistical methods used for analysis were frequency, descriptives, validity, t-test, oneway ANOVA. The major findings can be summarised as follows： 1. The textbooks on practical arts for 3rd, 4th, 5th and 6th grades showed unbalanced division for picture, figure, table unite and evaluation type of all units doesn’t show diversity. 2. The validity of textbook contents on practical arts was found to be the highest for 3rd grade textbook and the lowest for 6th grade one. Among the validity of the evaluation items,‘differentiation with other subject’and ‘usefulness of living’showed high scores, wheres ‘fitness of child level’marked lowest score. 3. There was no significant difference Among the validity contents of teachers based on socio-demographic variables.

• 한국농촌건축학회논문집
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• 제8권3호
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• pp.27-34
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• 2006

According to the results of analyzing the space composition by focusing on the impediment persons latrines among the public latrines, the conclusions of this study are as follows. In order to eliminate the rejection feeling which the word feeling of impediment persons' latrine communicates, its name should be changed into the impediment persons latrine. Thus, the impediment persons, the old and the weak, the pregnant women and the nursing mothers, who suffer the difficulty to use the general latrines, should use such impediment persons latrines jointly. By lowering the height from the ground to the latrine floor, the impediment persons, who use their wheel chairs, should gain the easy access to such impediment persons latrines. By equipping the doorway of public latrines and impediment persons latrines with the automatic door instead of the sliding door, the impediment persons should use such latrines conveniently. The locations and sizes of impediment persons latrines differ with one another. Therefore, it is necessary to unite constantly their location, scale, and facilities.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2006년도 추계학술발표대회
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• pp.187-190
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• 2006

텍스트위주의 자료와 영상회의 자료를 결합하여 통합하고 이를 웹을 통해 서비스 하도록 구현하였다. 멀티미디어 회의정보 등록시 사용자는 DAM실행 파일을 자신의 PC에서 실행하고 프로그램에 내장된 윈도우 탐색기를 통해 등록하고자 하는 회의파일을 선택하면 XML 자동 피싱모듈이 실행되면서 자료 저장을 위한 핵심정보와 검색을 위한 단어색인 및 인덱스를 수행하여 오류시에는 에러메세지를 보여주고 성공시에는 분석된 핵심정보를 제공해준다. 서버로 전송된 멀티미디어 회의자료는 종류/시간/등으로 구분되어 윈도우 탐색기 형태의 트리구조와 사용자가 직접 단어를 입력하여 원하는 회의 정보를 검색하는 2가지 형태의 검색서비스를 제공하게 된다. 사용자는 본인의 서비스 환경에 따라 영상+문서, 문서 등을 자유롭게 선택하여 볼 수 있다. DAM의 경제적인 효과에 대하여 정확한 통계 자료가 국내에 아직 발표되지 않아 유사분야인 WCM시장 분석을 근거로 예상하였으며 시스템이 다양하고 복잡해질수록 투자대비 경제적인 효과가 높아 동기화 기술분야 시장이 확대될 것으로 기대된다.

• 수산해양기술연구
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• 제30권1호
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• pp.25-32
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• 1994

An underwater speaker was made of a moving coil driver unite of usual speaker, acryl-boards, polyester resin, rubber and castor oil and it's frequency characteristics was measured in range of 250~600Hz in air water tank and sea. The results of measurements are follows: 1. Transmitting and receiving frequency of measurement frequency were similar in air, water tank and sea. 2. The input and output wave forms of a manufactured speaker which is not water-proof in air were similar to each other in 300~450Hz, but other frequencies showed distorted wave forms. 3. The input and output wave forms of an underwater speaker in water thank and sea were similar to each other in 250~600Hz. But output wave forms showed combination waves with very low frequency. 4. Transmitting and receiving frequency wave forms and resisting pressure of an underwater speaker at 80m in the depth of water were in good condition. Therefore it can be possible to use it as an underwater speaker.

• Steel and Composite Structures
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• 제49권3호
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• pp.271-280
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• 2023

In this study, the three-dimensional finite element method is used to analyze the behavior of corner cracks in finite-thickness plates repaired with a composite patch. The normalized stress intensity factor at the crack front is used as fracture criterion. Comparison of stress intensity factor values at the internal and external positions of repaired quarter-elliptical corner crack was done, for three repair techniques. The influence of mechanical and geometrical properties of the adhesive layer and the composite patch on the variation of the stress intensity factor (SIF) at the crack-front was highlighted. The obtained results show that the application of double patch leads to a remarkable reduction of SIF at the crack front, compared to facial and lateral repairs.

• 구강회복응용과학지
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• 제29권2호
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• pp.175-182
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• 2013

2단계 임플란트 수술법에 있어서 식립 후 골유착을 위한 치유과정 중 발생할 수 있는 덮개나사의 노출의 양상에 따른 조기 변연골 흡수 정도를 관찰하고자 하였다. 덮개나사의 노출을 보인 경우에서 선정 기준에 맞는 환자를 선택해 모집단으로 하여, 28명의 환자에서 덮개나사의 노출이 확인된 28개의 임플란트를 실험군으로 하고 노출되지 않은 나머지를 대조군으로 하였다. 총 64개의 임플란트 고정체($TiUnite^{TM}$, NobelBiocare, Sweden)가 식립되었으며 임플란트 식립 1개월 후 정기검사를 통해 덮개나사의 노출을 확인하였다. 노출의 정도에 따라 1군(대조군, 노출 없음), 2군(pin-point 노출), 3군(1/2이하의 노출), 4군(1/2 이상 노출), 5군(완전 노출)으로 하였고 2개월 정기 검진 시 치유지대주를 연결하였다. 식립 직후, 2개월 정기 검진시 치근단 방사선 촬영을 통해 변연골 흡수 변화량을 측정하고 비교하여 다음의 결과를 얻었다. 1. 덮개나사의 노출시 변연골 흡수가 관찰되었다. 2. 2군과 3군은 나머지 군에 비해 변연골 흡수 변화량이 유의하게 증가하였다(P <.05). 3. 4군과 5군은 1군에 비해 변연골 흡수 변화량이 유의하게 증가하였으나(P <.05), 그 정도는 2군과 3군에 비해 작았다(P <.05). 이상의 결과에서 임플란트 식립 후 치유과정 중 발생하는 덮개나사의 노출은 조기 변연골 흡수에 기여하므로 주기적인 검진을 통해 치유지대주를 연결하는 것이 임상적으로 적절하리라 사료된다.