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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>
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.
차별문항기능 분석의 효과성 검증 -일본인 한국어 학습자의 유학 유무와 문화 간 의사소통 능력을 중심으로-
신지원 ( Shin Jiwon ) 이중언어학회 2020 이중언어학 Vol.81 No.-
This study aims to examine the applicability of differential item functioning (DIF), a widely used concept in psychology, to Korean language education. The use of two-way analysis of variance (ANOVA) DIF as an analytic tool is also introduced and evaluated. Toward this end, data were collected from 122 Japanese female students to measure the effects of a study-abroad experience in Korea on their intercultural communication competence. A two-way ANOVA was used for the statistical testing of DIF. The results indicated that eight items functioned differently, depending on whether or not the students had undergone the experience of studying abroad in Korea. Through item content analysis, one item “foreign language phobia” was confirmed to be a bias item. Although there were no differences in the t-test and correlation results before and after the application of DIF, the reliability, t-value, and correlation coefficient for “foreign language phobia” changed. The results suggest that applying two-way ANOVA DIF to Korean language education research may increase the reliability and validity of questionnaire-based analyses. (Showa Women’s University)
대학생 진로역량개발을 위한 진로교과내용 개편의 방향성 : 학습자중심학습환경 제공 사례 중심으로
신지원(Shin JiWon) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.21
본 연구는 대학생들의 진로역량개발을 위한 진로교과내용 개편의 방향성을 살펴보기 위하여 학습자 중심의 학습 환경을 제공한 사례를 중심으로 그 내용을 도출하고자 한다. 이를 위하여 문헌조사를 통해 학습자 중심의 진로교육이 활용된 사례들을 살펴보았다. 수집한 자료를 활용하여 학습자가 스스로 주도적으로 학습을 할 수 있는 포트폴리오 및 플립러닝을 활용의 진로교육 사례, 학습자가 체험을 통하여 진로탐색을 할 수 있는 도전학기제 사례를 살펴보았다. 연구결과는 다음과 같다. 첫째,대학생 진로개발역량을 위한 진로교과목의 교육내용의 개편의 방향성은 학습자가 능동적이며, 주체적으로 느끼고 생각하며, 행동할 수 있도록 하는 체험적인 형태가 필요하며 이를 통하여 깊이 있는 실천적 지식을 구성하는 것이 필요했다. 둘째, 대학생 시절 다양한 진로탐색행동으로 학습자 스스로 진로역량에 대한 이해를 확장하는 것이 중요했다. 마지막으로 학습자가 다양한 진로탐색 행동을 통해 진로역량을 강화할 수 있는 환경을 대학에서 제공하는 것이 필요하였다. 이러한 연구결과를 토대로 대학생들이 변화하는 시대에 적합한 진로역량 개발을 할 수 있는 진로교과내용의 개편 방향성에 대한 시사점과 후속연구를 위한 제안을 논의하였다. This study aimed to reorganize a carer course contents direction for developing career development competency in undergraduates. Using the collected data, we examined the case of career education by using portfolio and flip learning, where learners can lead learning the case of the challenging semester system. The research results are as follows. The direction of the reorganization of the educational content of career courses for college students career development competency requires an experiential form that enables learners to be active, subjectively feel, think, and act. It will help you adapt. In addition, it is necessary for the university to provide an environment in which students can understand their career competency and gain an opportunity to strengthen it through practice of conducting various career exploration behaviors as a college student. Based on the results of this study, the implications of the direction of the reorganization of the career curriculum for college students to develop career competency suitable for the changing times and suggestions for follow-up studies were discussed.