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건식중간저장 조건 하에서 냉각속도에 따른 지르코늄 합금 피복관 수소화물 재배열 및 기계적 특성 평가
민수정 ( Su Jeong Min ),김명수 ( Myeong Su Kim ),원주진 ( Chu Chin Won ),김규태 ( Kyu Tae Kim ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.7
As-received Zr-Nb cladding tubes and 600 ppm hydrogen-charged tubes were employed to evaluate the effects of cladding cooling rates on the extent of hydride reorientation from circumferential hydrides to radial ones and mechanical property degradations with the use of cooling rates of 2, 4 and 15℃/min from 400℃ to room temperature simulating cladding cooling under interim dry storage conditions. The as-received cladding tubes generated nearly the same ultimate tensile strengths and plastic elongations, regardless of the cooling rates, because of a negligible hydrogen content in the cladding. The 600 ppm-H cladding tubes indicate that the slower cooling rate generated the larger radial hydride fraction and the longer radial hydrides, which resulted in greater mechanical performance degradations. The cooling rate of 2℃/min generates an ultimate tensile strength of 758 MPa and a plastic elongation of 1.0%, whereas the cooling rate of 15℃/min generates an ultimate tensile strength of 825 MPa and a plastic elongation of 15.0%. These remarkable mechanical property degradations of the 600 ppm-H cladding tubes with the slowest cooling rate may be characterized by cleavage fracture surface appearance enhanced by longer radial hydrides and their higher fraction that have been precipitated through a relatively larger nucleation and growth rate.
피복관 냉각에 의한 지르코늄 합금 피복관 수소화물 재배열 특성
김명수 ( Myeong Su Kim ),김현길 ( Hyun Gil Kim ),민수정 ( Su Jeong Min ),김규태 ( Kyu Tae Kim ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.7
The effects of cooling rates from 400 to 200℃ on hydride reorientation were investigated using ring specimens of 250 ppm and 500 ppm H Zr-Nb cladding tubes. For no stress conditions with cooling rates of 2.5 and 25.0℃/min, the 250 ppm H specimens show that hydride plates are reprecipitated only in a circumferential direction during the cooling from 400 to 200℃, but the hydride plates appear to be much shorter for the 25.0℃/min cooling rate. However, the 500 ppm H specimens show that hydride plates are reprecipitated as a mixture of circumferential and radial hydride plates for the 25.0℃/min cooling rate. This mixed hydride plates may be caused by a blocking effect of circumferential hydrides undissolved on the one hand and by a considerable tensile hoop stress locally generated by a large difference in the cooling rates between outer and interior layers on the other hand. For 150 MPa tensile hoop stress conditions with a cooling rate of 2.5℃/min, the 500 ppm H specimens show a relatively shorter radial hydride plates than the 250 ppm H specimens, which may be explained by a blocking effect of undissolved circumferential hydride plates in the 500 ppm H specimens. Tensile tests for the specimens experiencing the cooling from 400 to 200℃ under the 150 MPa hoop stress conditions indicate that there is little impact of hydrogen content on ultimate tensile strengths but the 250 ppm H specimens generate less plastic elongation and more noticeable cleavage fracture than the 500 ppmH specimens, which may be caused by relatively longer
Intelligibility Analysis and Cultural Linguistics
민수정(Su jung Min),김정옥(Jeong ok Kim) 한국영어어문교육학회 2016 영어어문교육 Vol.22 No.3
The global spread of English has resulted in an increasing number of cultures becoming associated with English (Smith, 1992). In the course of the development of new varieties of English, speakers associate their use of English with their own cultural schema. Therefore, world Englishes need to be examined from the perspective of Cultural Linguistics in order to gain a better understanding of how English is used by different communities of speakers around the world. This study investigates this concern, focusing on the English literature from different varieties of English. The study aims to get some insights into how intelligible it is to English speakers with different linguistic and cultural backgrounds and what factors are involved in the intelligibility of these English literatures from the perspective of Cultural Linguistics. The result shows that achieving a full understanding of the literary texts depends more on the readers familiarity with the cultural context and cultural schema within which the texts are embedded. The educational and theoretical implications of the findings are then discussed.
가정용 식품 방사능 모니터링 센서 개발 및 유용성 평가
박혜민 ( Hye Min Park ),김정호 ( Jeong Ho Kim ),이운장 ( Un Jang Lee ),김도형 ( Do Hyung Kim ),민수정 ( Su Jeong Min ),주관식 ( Koan Sik Joo ) 한국센서학회 2017 센서학회지 Vol.26 No.6
In this study, a foods radioactivity monitoring sensor was developed as a part of basic research for household radioactivity monitoring, and its performance was evaluated using a calibration source. The prototype of the sensor was based on a CsI:Tl scintillator using a crystal light guide and Si photomultiplier. The light guide was introduced to improve gamma-ray detection efficiency. For quantitative evaluation, tests were conducted using <sup>134</sup>Cs liquid source. In the performance evaluation, It was confirmed that analysis of <sup>134</sup>Cs: 100 Bq/ L(kg) was possible. Thus, result of this study is expected to contribute to research in the development of the household foods radioactivity monitoring system.
송병욱(Byung-Wook Song),민수정(Su-Jeong Min),김상욱(Sang-Wook Kim) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅱ
본 논문에서는 컴퓨터 교육을 위한 자료구조나 알고리즘의 특성을 이해시키기 위한 시각적인 애니메이션을 지원하는 ADVA(Animation on Data Structure and Visualization on Algorithm)의 개발에 사용된 컴포넌트를 제시하고 이의 구조와 기능을 설명한다. 이 컴포넌트는 각 자료 구조와 알고리즘의 시각 표현에서 요구되는 공통된 기능들을 지원하는 객체이다. 이는 재사용성을 증가시켜 ADVA의 제작을 용이하게 하고 표현의 통일성을 높여서 향상된 학습 효과를 얻을 수 있다.