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달탐사 로버의 X선 분광기 개념설계를 위한 예비 열해석
김정훈,전형열,주광혁,유명종 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.4
일본에서는 현재 달탐사용 로버(Rover)인 SELENE-2를 개발 중에 있으며, 로버에 장착될 X선 분광기 탑재체의 개발은 국제 공동 개발로 추진 중이다. X선 분광기는 달표면의 성분 분석을 위한 탑재체이다. 본 연구에서는 X선 분광기 탑재체의 초기 개념설계를 위하여 열해석을 수행하였다. 탑제체의 기하학적 형상은 공학적 의미가 있도록 전산열유체역학적인 방법을 사용하였다. 다양한 형상과 열경계조건에 따른 열해석을 수행하였으며 그 결과를 분석하였다. 최종 결과는 향후 탑재체의 예비 및 상세 설계자료의 기초 자료로 활용될 것이다. Nowadays, SELENE-2 is under development for the moon explorer rover in Japan. Active X-ray spectrometer payload of the rover development by which the moon surface component is analyzed is on going by the world-wide co-operation. Computational fluid dynamic techniques are used for the conceptual design and analysis. Various shape of the payload and thermal boundary conditions are selected and built up in order to the analysis of the initial design. The results of the analysis is supposed to be used the baseline for the detailed design of the payload in the future.
3종 혼합 잔골재를 사용한 굳지 않은 모르터의 성능 평가
유명열(Yu Myoung-Youl),이재용(Lee Jae-Yong),정철우(Chung Chul-Woo) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.1
The use recycled aggregate from the demolished concrete started to draw attention from concrete industry due to the economical and environmental concerns. The main use of recycled aggregate is to substitute for the coarse aggregate, but it is also used for the source of fine aggregate. However, the application of recycled fine aggregate to the concrete is still limited by the lack of the confidence in the quality of concrete. The available information from current research suggests the recycled fine aggregate to be substituted to natural fine aggregate for certain content, not recommended to use it by itself. Considering the lack of natural aggregate sources, the use of recycled fine aggregate needs to be promoted, for example, by blending it with other aggregates from various sources. To provide the guiding information for such applications, this research focuses on the investigation of mortar using fine aggregates from three different sources. The use of mortar is to remove the effect of coarse aggregate, and to efficiently evaluate the effect of blended fine aggregates to the properties of the mixture. Only fresh properties were investigated in this research, and the result indicated that the mortar flow was affected by the surface condition rather than the type of fine aggregate. The air content increased as the amount of porous recycled fine aggregate in the mixture increased. The unit weight was shown to be solely affected by the bulk specific densities of fine aggregates.
유명열,이재용,정철우 한국건축시공학회 2012 한국건축시공학회지 Vol.12 No.1
In this research, the possible applicability of mixture blended with natural, crushed, and recycled fine aggregate are discussed. The fresh and hardened properties of mortar using blended fine aggregates are monitored depending on various blending ratio of fine aggregates. Newly developed ternary diagram was also utilized for better interpretation of the data. It was found that air content increased and unit weight decreased as recycled fine aggregate content increased. With moisture type processing of recycled fine aggregate, the mortar flow was not negatively affected by increase in the recycled fine aggregate content. The ternary diagram is found to be an effective graphical presentation tool that can be used for the quality evaluation of mortar using blended fine aggregate.
유명열(MY Yu),이헌영(HY Lee),장종성(CS Chang),최성기(SK Choi) 대한산부인과학회 1968 Obstetrics & Gynecology Science Vol.11 No.2
Spontaneous rupture of the gravid uterus is infrequent and the combination with placeta percreta as the cause is extremely rare, but it is one of the most serious problem in clinical view-point of obstetrics. We present a case of spontaneous rupture of uterus due to placenta percreta which was 16th weeks gestation, and bave reviewed literature brietly.
마우스 Carbonic anhydrase 활성에 미치는 Xanthine 유도체의 영향
유명열,박형경,이정익,Yu, Myung-Yul,Park, Hyung-Kyung,Lee, Chung-Ik 대한약리학회 1972 대한약리학잡지 Vol.8 No.1
This study was undertaken to observe the effect of xanthine such as caffeine and aminophylline on the activity of carbonic anhydrase in the kidney and stomach of the mouse. Carbonic anhydrase activities were measured by Philpot & Philpot method (1936). The results of this experiment were as follows: 1. The activity of carbonic anhydrase in the kidney of the mouse was silightly inhibited by the administration of caffeine (0.1 mg/gm, B.W.) or aminophylline (0.08 mg/gm, B.W.). The inhibition was more pronounced by the administration of aminophylline than that of caffeine. 2. In the stomach, there was no significant change in the activity of the carbonic anhydrase after the administration of either caffeine or aminophylline.
천연골재, 부순골재, 순환골재의 혼합비율에 따른 혼합 잔골재의 성능평가
유명열(Yu Myoung-Youl),이재용(Lee Jae-Yong),정철우(Chung Chul-Woo) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.11
The resources of natural fine aggregate started to decrease due to the increase in the amount of construction. In addition, it becomes more difficult and less economical to dispose used concrete structure because of the environmental concerns. The use recycled aggregate from the demolished concrete to produce new concrete, therefore, becomes an important issue in the concrete industry. Currently, the recycled aggregates are often used as a source of fine aggregate after some mechanical treatment, but the application to the concrete is limited by the lack of the confidence in the quality of recycled fine aggregate. In most cases, recycled fine aggregate is used as a source of blending fine aggregates, not by itself. Although the standard specification for quality evaluation of the blended aggregates is available, it is still difficult to use blended aggregates in the construction field due to absence of quality management procedure. Therefore, this research especially focuses on the estimation of the properties of the fine aggregate blended by 3 different aggregates. The estimation of properties based on the individual properties of each aggregates was performed using linear interpolation, and compared to the measured values from blended aggregates. The results indicate that the properties of blended fine aggregates can be successfully calculated based on their individual properties.
유명열(MY Yu),장종성(CS Chang),함종국(JK Hahm),박경희(KH Park) 대한산부인과학회 1968 Obstetrics & Gynecology Science Vol.11 No.5
2 Case of Omphalocele are presented and the literatures on the Omphalocele are briefly reviewed
유명열(Yu Myoung-Youl),이재용(Lee Jae-Yong),최응규(Choi Eung-Kyoo),이현수(Lee Hyun-Soo) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.7
Carbonation does not cause deterioration of concrete but damage on durability of concrete because of corrosion of steel embedded in hydrating cement paste. In order to prevent reinforcing steel from corrosion, it is very important to maintain passivation by measurement of the depth of carbonation and repair. Laboratory techniques that can be used to determine the depth of carbonation are indicators, X-ray diffraction, infra-red spectroscopy and thermogravimetric analysis, etc. In those methods, phenolphthalein method is most useful in practical measurement because the method is easy and rapid to perform despite low reliability. Even though researches, which are carried out to improve the reliability of phenolphthalein method through standardization of usage, are being conducted, phenolphthalein method still has potential problems. 1) It is impossible to measure the degree of early carbonation and 2) the quantity of OH- with varying depth because the pink color indicates the presence of Ca(OH)2 in accordance with pH 8.9. In this study, many indicators are selected and applied to improve the reliability of phenolphthalein and solve the potential problems.