http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
Jeong, Hee Jin,Kim, Ho Young,Jeong, Hyun,Han, Joong Tark,Jeong, Seung Yol,Baeg, Kang-Jun,Jeong, Mun Seok,Lee, Geon-Woong Wiley-VCH 2014 Small Vol.10 No.10
<P>We present a straightforward method for simultaneously enhancing the electrical conductivity, environmental stability, and photocatalytic properties of graphene films through one-step transfer of CVD graphene and integration by introducing TiO2/graphene oxide layer. A highly durable and flexible TiO2 layer is successfully used as a supporting layer for graphene transfer instead of the commonly used PMMA. Transferred graphene/TiO2 film is directly used for measuring the carrier transport and optoelectronic properties without an extra TiO2 removal and following deposition steps for multifunctional integration into devices because the thin TiO2 layer is optically transparent and electrically semiconducting. Moreover, the TiO2 layer induces charge screening by electrostatically interacting with the residual oxygen moieties on graphene, which are charge scattering centers, resulting in a reduced current hysteresis. Adsorption of water and other chemical molecules onto the graphene surface is also prevented by the passivating TiO2 layer, resulting in the long term environmental stability of the graphene under high temperature and humidity. In addition, the graphene/TiO2 film shows effectively enhanced photocatalytic properties because of the increase in the transport efficiency of the photogenerated electrons due to the decrease in the injection barrier formed at the interface between the F-doped tin oxide and TiO2 layers.</P>
정해련 ( Jeong Hae Lyeon ),고승권 ( Go Seung Gwon ),한지영 ( Han Ji Yeong ),송은섭 ( Song Eun Seob ),박지현 ( Park Ji Hyeon ),이건영 ( Lee Geon Yeong ),황성욱 ( Hwang Seong Ug ),임문환 ( Im Mun Hwan ),이병익 ( Lee Byeong Ig ),이 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.1
Sex cord stromal tumors (GCT) of the ovary compose just 5% of ovarian tumors. Most of them are granulosa cell tumors (GCT). There are two types of tumors, juvenile (JGCT) and adult type (AGCT), which have different clinical and histopathological features.
문정용 ( Jeong-yong Mun ),나건민 ( Geon-min Na ),김학성 ( Hak-sung Kim ),조재희 ( Jae-hee Cho ) 한국교원대학교 과학교육연구소 2018 청람과학교육연구논총 Vol.24 No.1
이 연구의 목적은 고등학생들이 지구과학 분야에서 가지고 있는 개념 이해의 수준을 파악하여 올바른 과학적 개념을 형성할 수 있는 교수학습 방안을 마련하는 데 있다. 이를 위해 고등학교 1, 2학년 학생을 대상으로 고체지구, 대기와 해양, 우주 영역으로 구분하여 각 영역별 개념 이해의 수준을 분석하였다. 교사의 명확하지 않은 설명에 대하여 여과 없이 무의식적으로 받아들이거나 학생의 과학적인 관심이 낮아 과학적 개념과는 다른 오개념을 형성하는 것으로 나타났다. 이미 형성된 오개념에 대하여 적절한 교수 학습 모형을 활용하거나 교수 학습 자료 및 교구 개발을 통하여 올바른 과학적 개념을 형성하도록 도움을 줄 수 있다. This study is to analyze on high school students' levels of understanding concepts in the earth science subject in a small city in South Korea. The earth science subject is composed of diverse concepts in such fields as ‘the solid earth’, ‘the atmosphere and the ocean', and ‘the space'. The students who are the first and second graders in high school held misconceptions in the earth science subject since the students either unconsciously accepted ambiguous explanations of teacher or had a low level of interest in science. It is important to adopt appropriate teaching and learning methods in introducing scientific concepts in the earth science subject so that high school students may not develop misconceptions.