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박진수(Park, Jin-Su),황희준(Whang, Hee-Joon) 대한건축학회 2020 대한건축학회 학술발표대회 논문집 Vol.40 No.2
The purpose of this study is to understand the factors that influence the way of underground parking lots of large-scale apartment in Korea and to present the design guidelines for underground parking lots. In the experiment, modeling of the underground parking lot of the apartment is implemented in a virtual environment, and the experiment is proceeding after the experimenter wears the racing wheel and VR. Physical factors used in the experiment include floor level, color, signs, walls, main streets, and sunken. The factors in the experimental results had different effects on the underground parking lot. In future research, it is necessary to analyze the correlation between the factors of the underground parking space and the specific strengths and weaknesses of the factors based on the results of this study.
박진수(Park Jin Su) 가천대학교 아시아문화연구소 2006 아시아문화연구 Vol.10 No.-
This paper undertakes an analysis on the narrative style of novel that change the perspective of east asian people in the late 19th and early 20th century. Especially this paper focuses on Japan, the first country in east asia which drove forward the modernization. After the arrival of Commodore Perry and the Black Ship in 1853, Japan carried out Meiji Restoration(1868) and accepted the western civilization to cope with the western treat. The first east asian Genbunichitei'(modern colloquial style) invented in the modernization process. The transformation of Japanese narrative style can be classified into three stages. The first stage was the mythical and historical narrative before Kana(japanese alphabet), such as Kojiki(古事記, 712). The typical narrative of second stage was Dynasty narravie fiction such as The Tale of Genji(源氏物語, 1010) after the formation of Kana. The most modern novel since Ukigumo(浮雲, 1888-90) belonged to the third stage. The three stages reflected not only the style itself but the perspective which occurred before expression. The important point must be noted is that the language of modern novel changed the asian traditional thinking. It invented the new episteme and expression style not only in Japan but also in China and Korea that followed the Japanese modernization. The first successful example of spiritual modernization is Ukigumo written by Futabatei Simei(二葉亭四迷, 1864-1909). Futabatei substituted 'newly invented artificial style' for the traditional Kanbun(chinese literary) style. Genbunichitai was an ideology that was necessary for the modern nation state formation.
박진수(Jinsoo Park),최지선(Jiseon Choi),유이상(Isang Yu),고영성(Youngsung Ko),김선진(Sunjin Kim),신동순(Dongsun Shin) 한국추진공학회 2017 한국추진공학회 학술대회논문집 Vol.2017 No.5
열교환기 지상시험 설비의 내구성 확보를 위해 필수적인 냉각수 매니폴드에 대해 열/유동해석을 진행했으며, 분사기와 유로의 배열 등의 형상을 결정해 개발 중인 엔진의 헤드에 적용하였다. 제작된 엔진 헤드에 대한 검증시험이 진행됐으며, 엔진의 분사기면에 도포된 열차단코팅(TBC) 등에서 열적 손상이 확인되지 않았다. 연소시험 결과와 수치해석을 비교하면 냉각수 출구온도가 15℃ 정도의 차이를 보이지만 냉각수 매니폴드 상부에 위치하는 액체산소 매니폴드, 열 차폐코팅, 화염면의 위치 등을 감안하면 합당한 수준으로 판단된다. Numerical heat/flow analysis was performed on a liquid rocket engine head with the cooling water manifold to ensure the durability of a ground test facility for heat exchanger. Through these studies, the shapes of the injector and the flow path were determined and applied to the head of the engine under development. Firing tests were conducted to verify the designed coolant manifold and no thermal damage was found on the engine-head-face. Comparing the combustion test results with the numerical analysis, the outlet temperature of coolant showed a difference of about 15℃. This trend is reasonable considering existence of LOX manifold, thermal barrier coating, and the actual location of flame.
알루미늄 기지에 알루미늄-알루미나 혼합분말을 이용한 고온플라즈마 열분사 코팅층의 밀착강도 향상기구
박진수,이효룡,이범호,박준식,Park, Jin Soo,Lee, Hyo Ryong,Lee, Beom Ho,Park, Joon Sik 한국재료학회 2015 한국재료학회지 Vol.25 No.5
본 연구에서는 손상된 알루미늄 금형의 복원을 위해 고온플라즈마 용사법을 이용하여 금형의 표면에 $Al/Al_2O_3$ 혼합분말을 용사한 후 코팅층과 모재의 증착강도에 대한 평가를 수행하였다. 증착강도의 평가는 분사노즐의 이동속도, 순수한 알루미늄 bond coat 층의 유무에 따라 평가되었으며, bond coat 층을 생성시키지 않았을 때, 코팅층의 두께는 열팽창에 의한 잔류인장응력의 감소를 위해 두껍지 않아야 하지만 일정두께 이상이 되어야 최대의 증착강도를 얻을 수 있음이 나타났다. 또한 순수한 알루미늄 bond coat 층은 내부 결함이 없는 응고된 금속이기 때문에 두께에 따른 증착강도의 영향을 그대로 받아 두께가 두꺼울수록 bond coat 층을 생성시키지 않은 시험편보다 증착강도가 매우 낮게 측정되었다. 반면, 가장 얇게 bond coating 된 시험편 Bc3(3회의 bond coating층과 분사건의 이동속도가 20 cm/sec인 시험편) 는 bond coating을 하지 않은 시험편 중 가장 높은 증착강도를 가지는 시험편 Wbc20(bond coating층이 없고 분사건의 이동속도가 20 cm/sec인 시험편)보다 약 2배 이상증착강도가 향상되었다. 따라서 금형의 복원시에 중간층의 형성이 반드시 필요하며, 이는 코팅층의 잔류 인장응력을 보완시키며 고인성의 순수한 알루미늄과 같은 코팅층과 유사한 층을 코팅하는 것이 필요한 것으로 사료된다. High temperature plasma coating technology has been applied to recover damaged aluminum dies from wear by spraying pure aluminum and alumina powder. However, the coated mixed powder layer composed of aluminum and alumina often undergoes a detachment from the substrate, making the coated substrate die unable to maintain its expected life span. In this study, in order to increase the bonding strength between the substrate and the coating layer, a pure aluminum layer was applied as an intermediate bond layer. In order to prepare the specimen with variable bond coating conditions, the bond coat layers with a various gun speed from 10 cm/sec to 30 cm/sec were prepared with coating cycle variations ranging from three to nine cycles. The specimen with a bond coat layer coated with a gun speed of 20 cm/sec and three coating cycles exhibited ~13MPa of adhesion strength, while the specimen without a bond coat layer showed ~6 MPa of adhesion strength. The adhesion strength with a variation of bond coat layer thickness is discussed in terms of coating parameters.