http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박율민,조화순 연세대학교 동서문제연구원 2015 동서연구 Vol.27 No.2
Among a myriad of political issues raised in South Korea, the debate on South Korea’s policy toward North Korea or on reunification brings about sharp conflicts. This research analyzes how the discourse upon Korea reunification in South Korea is formulated in media, especially in newspapers. We gathered news articles regarding reunification issues from the Hankyoreh and Kyunghyang Shinmun, referred to as ideologically liberal, as well as Chosun Ilbo and Dong-a Ilbo, conservative, using Web Crawling to find out how the reunification discourse is formed according to the media’s either liberal or conservative perspectives. By collecting news articles from the 4 published newspapers which include either ‘reunification’ and ‘South-North’ or ‘reunification’ and ‘North Korea,’ and with the practice of Topic Modeling and network analysis, we analyzed selected topics and correlations between words that constitute each topic. This article identifies that different types of discourse, specifically different topics, are opted out depending on newspapers with the opposite ideologies. It also points out a disparity in the storyline even under the same topic, following the media’s dominant ideology. 본 연구는 한국 사회에서 첨예한 갈등을 보이고 있는 통일 담론이 미디어, 특히 신문 매체 내에서 어떻게 형성되고 있는지를 분석해 보았다. 구체적으로 통일 문제에 대한 진보와 보수 신문으로 지칭되는 한겨레와 경향신문과 조선일보와 동아일보 양 진영의 기사를 웹 크롤링을 통해 수집하고 분석하여 통일 담론이 신문 매체의 진보 혹은 보수적 성격에 따라 어떻게 나타나는지를 살펴보았다. 4개 신문 지면에 게재된 기사 중 ‘통일’과 ‘남북’, 또는 ‘통일’과 ‘북한’이 등장하는 기사들을 수집하여, 토픽 모델링 기법과 네트워크 분석을 통해 주제를 분석하고 주제를 구성하는 단어들의 연관성을 분석하였다. 본 논문은 다른 이념적 성향을 가진 신문 매체에 따라 통일에 대한 다른 담론이 추출되는 것을 확인하였으며, 동일한 주제에 대해서도 그 세부 내용이 매체 별로 다르게 나타나는 것을 확인하였다.
플라즈마 침질탄화처리시 처리시간이 화합물층의 특성에 미치는 영향
박율민(Y. M. Park),신평우(P. W. Shin),조효석(H. S. Cho),남기석(K. S Nam),이구현(K. H. Lee) 한국진공학회(ASCT) 2000 Applied Science and Convergence Technology Vol.9 No.4
플라즈마 침질탄화처리는 보통탄소강, 저합금강 등에 내마모성, 내식성 및 내피로성 향상에 사용되어 있으며 자동차 부품, 기계류 부품, 공업용 공구 등에 적용할 수 있는 표면경화열처리이지만 내마모성 및 내식성을 향상시키는 단상의 ε 화합물층을 생성시키기는 어려운 문제점으로 남아 있다. 따라서 본 연구에서는 탄소강과 저합금강에 대해 질소와 CH₄ 가스농도를 변화시켜 플라즈마 침질탄화처리를 실시하여 단상의 ε 화합물층 생성가능성과 시간을 변화시켜 화합물층의 생성과정을 고찰하였다. ε 화합물층은 질소농도가 증가할수록 형성이 용이하였고 CH₄ 가스농도가 증가할수록 ε 화합물층의 형성이 용이하였지만 시멘타이트상이 생성되었다. 화합물층은 10분이 경과한 후 생성되었고 γ’상으로부터 시작되었으며 처리시간이 10시간 이상이 되면 화합물층내에 시멘타이트상이 생성되어 화합물층의 두께가 감소하였다. Plasma nitrocarburising is a thermochemical heat treatment, and can be used for plain carbon steels and low alloy steels to improve wear, corrosion and fatigue resistance. The process is performed on automotive parts, machinery parts and engineering tools. However, it is still facing problems in obtaining a mono ε phased compound layer. Therefore, the aim of this research is to investigate the possibility of forming a mono ε phased compound layer using a gas mixture of nitrogen and methane. ε was found that high nitrogen contents were essential for the production of ε phase compound layer and with increasing methane content in the gas mixture, ε phase compound layer was favoured. In addition, when the methane content was further increased, cementite was observed in the compound layer. γ' phase was produced after 10 minutes treatment time and cementite was formed in the compound layer resulting in decreasing the thickness of the compound layer.
Al-6%Cu-0.4%Zr(Supral 100)합금의 온도와 변형 속도에 따른 초소성 특성 연구
최원호,박율민,김현철,신평우 國立 昌原大學校 産業技術硏究所 2000 産技硏論文集 Vol.14 No.-
Superplastic materials have a characteristics to undergo large uniform strain prior to failure. Superplasticity usually indicates that elongation to failure in the uni-axial tension is above 200%. There are several superplastic materials to be elongated up to 1000%. The microstructures were evaluated with temperature changes just before superplastic deformation in static recrystallization experiments, and it was found that amount of recrystallization was small below 425℃ and grain coarsening occured above 475℃ as ZrAl₃precipitation lost in inhibiting ability grain coarsening. Therefore optimum superplastic forming temperature proved 450℃. Optimum strain rate sensibility at superplastic tensile test was ?? reasonable.
캐비테이션-에로젼 특성에 미치는 HVOF 용사조건의 영향
변응선,유인준,이규환,박율민 한국표면공학회 2009 한국표면공학회 학술발표회 초록집 Vol.2009 No.10
캐비테이션-에로젼은 침식부식과 유사한 형태의 침식에 의한 손상이다. 즉, 고속의 애체흐름에 노출된 금속 표면을 따라 압력변화에 의해서 생성된 기포들이 파괴되는 것과 관련하여 일어나는 표면손상의 한 형태이다 . 본 연구에서는 캐비테이션-에로젼 손상을 억제하기 위하여 WC 서멧을 HVOF 용사하였으며, 캐비테이션-에로젼 특성에 미치는 용사조건의 영향에 중점을 비교분석하였다.
열처리를 통한 3가 크롬도금층의 마모 및 부식특성 개선
남기석 ( Nam Gi Seog ),박율민 ( Park Yul Min ),나종주 ( Na Jong Ju ),권식철 ( Kwon Sig Cheol ) 한국열처리공학회 2003 熱處理工學會誌 Vol.16 No.6
N/A To improve properties of wear resistance and anti-corrosion of the trivalent chromium platings, oxinitrocarburising and steam oxidation were conducted. Armophous trivalent Cr platings could be transformed to chromium carbides of high hardness, that showed low friction and wear rate. Even though micro-cracks were within as platings, superior anti-corrosion property was obtained by these treatments due to healing of cracks at the interface between the trivalent chromium platings and substrate.
중대형 보일러용 FD FAN의 베인 댐퍼 구조 개선에 관한 연구
강봉성(Bong Sung Kang),박율민(Yool Min Park),김성문(Sung Moon Kim),정순재(Soon Jae Jung),유민경(Min Gyung Yoo),장성철(Sung Cheol Jang) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
This study have processed the developing of vane damper with accurate control by using gear which is a flow-control equipment of marine boiler's FD fan on this research. For the developing of vane damper, we have corrected some problem from welding & assembly process by changing the design, and for the case of an emergency case, we have applied the easy disassembly & assembly on that vane damper. Compared to Rink type vane damper in current, we have focused on high efficiency with low price of that new developing damper. For selection of actuator, we have tried to find the propriety with our developing focus. Also, we have developed a jig of assembly processing for high productivity with quality, it caused the best assembly performance with heat-treated & processed parts.
저탄소강의 질화침탄과 산화처리시 분위기 변화에 따른 조직 및 부식특성에 관한 연구
신평우 ( Sin Pyeong U ),이구현 ( Lee Gu Hyeon ),남기석 ( Nam Gi Seog ),박율민 ( Park Yul Min ),조형준 ( Jo Hyeong Jun ) 한국열처리공학회 2004 熱處理工學會誌 Vol.17 No.2
N/A Nitrocarburizing was carried out with various CH, gas composition with 4 torr gas pressure at 570 C for 3 hours and post oxidation was carried out with 100% 0, gas atmosphere with 4 torr at different temperatures for various time. In the case of plasma nitrocarburizin, It is that the ratio of ε-Fe_(2·3)(N, C) and γ`-Fe,(C, N), which comprise the compound layer phase, depend on concentrations of N₂ gas and CH, such that when the concentration of N, and CH, increased, the ratio of γ`-Fe₄(C, N) decreased, but the ratio of ε-Fe_(2·3)(N, C) increased. The thickness of compound layer consistently increased as gas concentration increased regardless of N₂ and CH, expect when the concentration of CH, was 3.5 volume%, it decreased insignificantly. When oxidizing for 15min in the temperature range of 460-570℃, the study found small amount of Fe3O4 at the temperature of 460℃ and also found that amounts of Fe₂O₃ and Fe₃O₄ on the surface and amount of γ`-Fe₄(C, N) in the compound layer increased as the increased over 460℃, but the thickness of the compound layer decreased, Corrosion resistance was influenced by oxidation times and temperature.
이구현(K . H . Lee),남기석(K . S . Nam),이상로(S . R . Lee),조효석(H . S . Cho),신평우(P . W . Shin),박율민(Y . M . Park) 한국열처리공학회 2001 熱處理工學會誌 Vol.14 No.2
N/A Plasma nitrocarburising and post oxidation were performed on SM45C steel using a plasma nitriding unit. Nitrocarburising was carried out with various methane gas compositions with 4 torr gas pressure at 570℃ for 3hours and post oxidation was carried out with 100% oxygen gas atmosphere with 4 torr at different temperatures for various times. It was found that the compound layer produced by plasma nitrocarburising consisted of predominantly ε-Fe_(2-3)(N,C) and a small proportion of γ-Fe₄(N,C). With increasing methane content in the gas mixture, a phase compound layer was favoured. In addition, when the methane content was further increased, cementite was observed in the compound layer. The very thin oxide layer on top of the compound layer was obtained by post oxidation. The formation of oxide phase was initially started from the magnetite(Fe₃O₄) and with increasing oxidation time, the oxide phase was increased. With increasing oxidation temperature, oxide phase was increased. However the oxide layer was split from the compound layer at high temperature. Corrosion resistance was slightly influenced by oxidation times and temperatures.