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Jiwon Shin,Ok Hee Woo,Hye Seon Shin,Sung Eun Song,Kyu Ran Cho,Bo Kyoung Seo 대한영상의학회 2022 대한영상의학회지 Vol.83 No.5
Purpose To evaluate the diagnostic performance of digital breast tomosynthesis (DBT) with the two-dimensional synthesized mammogram (2DSM), compared to full-field digital mammography (FFDM), for suspicious microcalcifications in the breast ahead of stereotactic biopsy and to assess the diagnostic image visibility of the images. Materials and Methods This retrospective study involved 189 patients with microcalcifications, which were histopathologically verified by stereotactic breast biopsy, who underwent DBT with 2DSM and FFDM between January 8, 2015, and January 20, 2020. Two radiologists assessed all cases of microcalcifications based on Breast Imaging Reporting and Data System (BI-RADS) independently. They were blinded to the histopathologic outcome and additionally evaluated lesion visibility using a fivepoint scoring scale. Results Overall, the inter-observer agreement was excellent (0.9559). Under the setting of category 4A as negative due to the low possibility of malignancy and to avoid the dilution of malignancy criteria in our study, McNemar tests confirmed no significant difference between the performances of the two modalities in detecting microcalcifications with a high potential for malignancy (4B, 4C, or 5; p = 0.1573); however, the tests showed a significant difference between their performances in detecting microcalcifications with a high potential for benignancy (4A; p = 0.0009). DBT with 2DSM demonstrated superior visibility and diagnostic performance than FFDM in dense breasts. Conclusion DBT with 2DSM is superior to FFDM in terms of total diagnostic accuracy and lesion visibility for benign microcalcifications in dense breasts. This study suggests a promising role for DBT with 2DSM as an accommodating tool for stereotactic biopsy in female with dense breasts and suspicious breast microcalcifications.
Recasting Colonial Space - Naturalist Vision and Modern Fiction in 1920s Korea
Jiwon Shin 서울대학교 국제학연구소 2004 Journal of International and Area Studies Vol.11 No.3
This essay examines the correlation between two important yet seemingly unconnected developments in colonial Korean culture and literature at the advent of the Cultural Rule: the growth of urban visual culture on the one hand, and the emerging literary aesthetics centering on naturalism on the other. As a case study to explore the link between these two developments, the essay analyzes the colonial space as it is represented in the 1920s fiction, particularly in the early writings of Y?m Sang-s?p.
Shin, Jiwon,Cho, Kyungjune,Kim, Tae-Young,Pak, Jinsu,Kim, Jae-Keun,Lee, Woocheol,Kim, Jaeyoung,Chung, Seungjun,Hong, Woong-Ki,Lee, Takhee The Royal Society of Chemistry 2019 Nanoscale Vol.11 No.29
<P>The irradiation effect of high energy proton beams on tungsten diselenide (WSe2) ambipolar field-effect transistors was investigated. We measured the electrical characteristics of the fabricated WSe2 FETs before and after the 10 MeV proton beam irradiation with different doses of 10<SUP>12</SUP>, 10<SUP>13</SUP>, 10<SUP>14</SUP>, and 10<SUP>15</SUP> cm<SUP>−2</SUP>. For low dose conditions (10<SUP>12</SUP>, 10<SUP>13</SUP>, and 10<SUP>14</SUP> cm<SUP>−2</SUP>), the threshold voltages shifted to the negative gate voltage direction, and the current in the hole and electron accumulation regimes decreased and increased, respectively. However, the trends were opposite for the high dose condition (10<SUP>15</SUP> cm<SUP>−2</SUP>); the threshold voltages shifted to the positive gate voltage direction, and the current in the hole and electron accumulation regimes increased and decreased, respectively. These phenomena can be explained by the combined effect of proton irradiation-induced traps and the applied gate bias condition. Specifically, irradiation-induced positive oxide traps in SiO2 dielectrics play a role in enhancing electron accumulation and reducing hole accumulation in the WSe2 channel, whereas the irradiation-induced holes near the WSe2/SiO2 interface act as electron trapping sites, with enhancing hole accumulation and reducing electron accumulation in the WSe2 channel. This work will help improve the understanding of the effect of high energy irradiation on WSe2-based and other ambipolar nanoelectronic devices. In addition, this work shows the possibility of tuning the electrical properties of WSe2-based devices.</P>
신지원 ( Shin Jiwon ) 한국언어문화학회 2023 한국언어문화 Vol.- No.82
본고는 유의어의 의미 차이 분석 방법 중 하나인 ‘반의 검증법(opposite test method)’이 유의어 교수-학습에 유의미한 방법이라는 것을 밝히고자 한다. 한국어 학습자와 교사의 설문 조사를 통해 가장 중요하면서 어려운 한국어 영역을 어휘로 답하였으며, 그중에서도 유의어라고 답하였다. 그럼에도 불구하고 유의어 교육 방안에 대한 연구는 미미한 실정이다. 본고는 Ullmann(1967)이 유의어 의미 차이 분석 방법으로 제시한 교체 검증(substitution test), 배열 검증(arrange test), 대립 검증(opposite test) 중에 연구가 덜 이루어진 ‘반의 검증법’을 선정하여, 유의어 의미 차이를 분석하는 데 유의미한 방법인가를 한국어 학습자의 말뭉치 자료와 한국어 모어 화자의 유의어 변별 실험을 통해 밝히고자 한다. 마지막으로 이를 바탕으로 반의어를 활용한 효과적인 유의어 교수-학습 방안을 제시한다. This paper aims to clarify that the “opposite test method,” one of the methods of analyzing the meaning difference of synonyms is a meaningful method for teaching-learning of synonyms. Through a survey of Korean learners and teachers, the most important and difficult Korean language area was answered with vocabulary, and among them, it was answered as a synonym. Nevertheless, research on synonym education plans is insignificant. This paper aims to present a phenomenal argument that the ‘opposite method’ is meaningful in analyzing the semantic difference analysis between Korean learners’ corpus data and Korean native speakers’ synonym discrimination experiments to determine whether the ‘opposite method’ is meaningful in Korean language education and use among the substitution test, opposition test, and arrange test suggested by Ullmann (1967). Finally, based on this, it presents an effective synonym teaching-learning plan using antonyms.