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고체내 다전자계에서 사영자의 선택에 따른 선형광전도도내의 감쇠인자 비교
이현정,이연주,이재훈,김소연,강남룡,석정영,조상규,최상돈 한국물리학회 2003 새물리 Vol.47 No.2
Two different projection techniques are applied to derive the damping factors contained in the optical conductivity tensors of a many-electron system in solids. The damping terms contain the effect of the external radiation, as well as the electron phonon interaction. The two results turn out to be different form each other in general. The first form is well known to be applicable to cyclotron transitions in systems with constant energy separations. The second one seems to be more suitable for transitions with irregular energy separations. 고체내 다전자계에서 광전도도의 감쇠인자를 사영연산자 방법을 달리하여 유도 하였다. 여기서 구한 이 감쇠인자에는 전자-포논 사이의 충돌과정뿐만 아니라 외부에서 주어진 빛의 효과를 포함하고 있다. 각각의 산란인자를 다르게 할경우 전자-포논 뿐만 아니라 전자-전자 또는 전자-불순물에 까지 응용 할 수 있다고 생각된다. 여기에서 구한 광전도도에서 첫번째 사영 방법으로 구한 감쇠인자는 직접전이형 사이클로트론 공명과 같이 에너지 간격이 일정한 경우에 한하여 적용가능하지만, 두번째 방법으로 구한 감쇠인자는 위의 경우뿐만아니라 에너지 간격이 일정하지 않는 경우에서도 적용가능하다고 생각된다.
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준2차원 전자계의 광전이 형식화에서 두가지 사영방법의 비교
이현정,이연주,최상돈,강남룡 한국물리학회 2002 새물리 Vol.45 No.1
The optical transitions in a quasi-2-dimensional electron system confined by a parabolic potential well is formulated by utilizing projection techniques. The result obtained by method B is shown to be, more or less, similar to that obtained by method A, which was reported earlier. A full comparison can be made by comparison with proper experimental results, which is impossible in the present situation because no experimental date are available for this system. 본 연구에서는 사영방법을 사용하여 포물형 퍼텐셜 우물에 갇혀 있는 준2차원 전자계의 광전이를 형식화 하였다. 형식 B로 구한 결과는 이전에 발표한 형식 A에 의한 결과와 비슷함을 발견했다. 그러나 이 두결과의 완전한 비교는 적절한 실험결과의 도움을 받아야 가능하지만, 이것은 현재 적절한 실험결과가 없기 때문에 가능하지 않다.
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융합시뮬레이션 교육이 간호학생의 문제해결능력, 자기효능감 및 핵심기본간호술 수행자신감에 미치는 효과
이현정 중소기업융합학회 2020 융합정보논문지 Vol.10 No.1
본 연구는 융합시뮬레이션교육이 간호학생의 문제해결능력과 자기효능감 및 핵심기본간호술 수행자신감에 미치는 효과를 규명하고자 실험군 97명, 대조군 87명을 대상으로 시행된 비동등성 대조군 사후설계 유사실험연구 이다. 수집된 자료는 independent t-test, Chi-square test 및 Pearson's correlation으로 분석하였다. 연구결 과 융합시뮬레이션 교육 후 실험군의 문제해결능력(t=-2.04 , p=.043) 및 핵심기본간호술 수행자신감(t=5.31 , p <.001)이 유의하게 높았다. 본 연구결과는 4학년 간호학생에게 세부 전공별 간호단위를 통합한 융합시뮬레이션 교육을 적용하여 간호학생의 임상수행능력을 향상시킬 수 있는 방안을 모색하는 근거를 마련함에 의의가 있다. 효 과적인 융합시뮬레이션 교육을 위해 다양한 교과목 콘텐츠의 지속적인 개발 및 그 효과를 검증하는 반복 및 융합 연구를 제안한다. This study was performed to examine the effect of convergence-based simulation education on the problem solving ability and self-efficacy and confidence of core fundamental nursing skill performance for nursing students. A non equivalent control group post-test only design was utilized(experimental group(n=97), control group (n=87)). Data were analyzed using independent t-test, Chi-square test and Pearson's correlation. The scores of the problem solving ability(t=-2.04 , p=.043) and confidence of core fundamental nursing skill performance(t=5.31 , p<.001) were higher than those of the experimental group than control group. It is necessary to find ways to iterative and convergent research that verifies the continuous development and effectiveness of various courses.
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Effects of Consciousness-raising Tasks on Young Learners’ L2 Grammar Learning
이현정 한국초등영어교육학회 2018 초등영어교육 Vol.24 No.4
This study investigates the efficacy of consciousness-raising (CR) tasks on promoting Korean primary students’ learning of English comparative structure. In order to examine differential effectiveness stemmed from differences in task type, two CR tasks - hypothesis building and text repair were selected, and they were compared with deductive grammar instruction. The effects of each instructional treatment were measured by analyzing data from oral test and written test. Results showed that both text repair task and hypothesis building task created significant learning gains yet there was no significant difference between two tasks. Data analysis, however, revealed that only hypothesis building group performed significantly better than control group. More favorable results from hypothesis building task were discussed in two perspectives; 1) differences in task types might result in qualitative distinctions of learners’ engagement and hypothesis building was better condition leading to a more active reasoning process, 2) teacher’s guidance might be significant mediator for bringing successful learning process and outcomes in implementing CR tasks. The results of this study thus supports the beneficial role of CR tasks on primary students’ L2 grammar learning. Succeeding research is required to further explore the effects of CR tasks in a more refined way which includes elaborate operation of related variables such as task demand or teacher’s guidance.
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중국 17년 시기 스포츠 영화에서 신체의 의미 — 「여자농구선수 5번」(1957)과 「다리, 샤오리, 라오리」(1962)를 중심으로
이현정 한국중국현대문학학회 2021 中國現代文學 Vol.- No.97
Chinese films of the seventeen years period (1949-1966), like other areas of art of the same period, were closely related to the ongoing project of nation building, and, to a varying degree, show the efforts to develop new aesthetics to express the new national ideology. This paper focuses on Xie Jin’s films Woman Basketball Player No.5 (1957) and Big Li, Little Li, and Old Li (1962), which outstand among the sports films of the time, and examines the ways the bodies and the structure of vision presented in the films produce meanings in accordance with and beyond the ideological themes of the film. In Woman Basketball Player No.5, bodies and practices of sports give way to nationalist ideology and almost disappear from the screen, while the love story between the main characters is brought to the fore to materialize the unity of aesthetics and ideology. In other words, in this film, the aesthetics of body had yet to be established, while Shanghai-style aesthetics was able to successfully combine with the nationalist ideology. Five years later, Big Li, Little Li, and Old Li delineated a new aesthetics of body embodying the aspirations of the communal life. In the film, characters are fascinated by sports demonstrations and start practicing themselves, subsequently becoming new models to be seen and emulated by others. In this structure of vision and imitation, a bright and vibrant community is created in which the aesthetics of body and the joy of new communal life are harmoniously combined.
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