• Journal of Chest Surgery
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• v.43 no.4
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• pp.447-449
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• 2010

Langerhans cell Histiocytosis can present as a single or multiple lesion and can affect one or several organ systems. A 41-year-old woman with a history of multisystemic Langerhans cell Histiocytosis invading lung and thyroid was admitted with left-sided spontaneous pneumothorax. Here we report a case of uncommon pulmonary Langerhans-cell Histiocytosis presenting with spontaneous pneumothorax as a multisystemic Langerhans cell Histiocytosis.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06a
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• pp.286-287
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• 2007

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.12
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• pp.6330-6339
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• 2013

The aims of this study were to identify the significant predictors of the sexual behavior of middle school students. The subjects consisted of 603 middle school students (male 344, female 259). The data was collected through self-report questionnaires, which were constructed to include the attitudes to sexual behavior, sexual permissiveness, perceived behavioral control, sexual behavioral intention, father's child-rearing attitudes, mother's child-rearing attitudes, friends' attitudes to sex, exposure to pornography, and sexual behavior. The data was analyzed using the SPSS 19.0 program. The significant predictors of sexual behavior of middle school students that explained 51.0% of the variance in sexual behavior were the friends' attitudes to sex, alcohol drinking experience, experience of sexual abuse, sexual permissiveness, exposure to pornography, sexual behavioral intention, perceived behavioral control, father's child-rearing attitudes, and mother's child-rearing attitudes. These findings suggest that the approach to a sexual education promotion program for middle school students should consider multisystemic predictors.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.02a
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• pp.76-76
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• 2013

Scanning Tunneling Microscopy는 개인용컴퓨터가 보급되고, 저잡음 아날로그 칩들을 구할 수 있으며, 압전세라믹 기술이 발달하기 시작한 1981년 스위스 IBM Zurich 연구소에서 H. Rohrer와 G. Binnig 박사에 의하여 발명되었다. 이 발명 7~8년 이전 미국 표준연구원의 R. Young 박사도 비슷한 시도를 하였지만, 이 때는 제어할 수 있는 컴퓨터가 없었고, 조절 회로의 잡음 레벨도 컸으며, 역학적 진동도 커서 목적을 달성할 수 없었다. STM의 발명 후 32년이 지난 지금, 조절용 컴퓨터의 발전은 물론, 조절용 역되먹임 회로 또한 digital signal processor나 FPGA를 사용하는 형태로 변화하여 전기적 잡음도 현저히 감소하였다 [1,2]. 동시에 측정 에너지 해상도를 개선하기 위하여 세계적으로 여러 그룹이 장치를 1 K 이하에서 작동할 수 있게 제작하였고, 0.3 K에서 작동하는 상업용 제품도 등장하였다. 이 결과 에너지 해상도는 30 meV 에서 2~3 ${\mu}eV$ 감소하였고, 온도변화에 따른 측정 위치의 변화도 피할 수 있게 되었다. 터널링 검침의 화학적 성분을 흡착과 같은 방법으로 조절하여, 공간 해상도는 물론 에너지 해상도도 더욱 줄일 수 있게 되었고, 스핀에 민감한 터널링 제어도 가능하게 되었다. 이제는 금속, 반도체, 초전도체는 물론 분자, 거대분자, 나노 크기의 양자점등도 측정이 가능하게 되었다. 분자진동 측정이 가능하며, 분자의 성분 분석이 가능하게 되었고, 스핀의 전도와 관련된 제반 문제들을 연구할 수 있게 되었다. 지금부터 10년 동안에는 포논의 측정과 전자와 포논 exciton 등이 관여된 다체계 현상, 이들의 동역학적 현상이 측정 가능하게 되었다. 핵자기 공명도 시도되고 있으며 화학적 구명 및 원자들 사이의 결합도 측정 가능하게 될 것이다. 이제 STM은 초고 진공에서 작동하는 Atomic Force Microscopy와 함께 지금까지 고체물리학 실험 장치가 만들어 내지 못하던 새로운 결과를 도출해 낼 것으로 기대한다.

• Journal of the Korean Society of Child Welfare
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• no.54
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• pp.173-197
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• 2016

This study aims to examine developmental trajectories and predictor variables of problem behaviors and school adjustment trajectories among children from low-income families using latent growth modeling. The data was collected from the 2nd year to the 4th year (2012-2014) of a community child center child panel survey conducted by the National Youth Policy Institute. The major findings are as follows. First, as the grade went up, the problem behaviors of children from low-income families increased while school adjustment decreased. Second, multi-level domains, such as individual, school, and family variables influenced school adjustment trajectory, while only individual variables, such as depression, isolation, and motivation for achievement influenced problem behavior trajectory. Third, common protective factors between problem behaviors and school adjustment trajectories were motivation for achievement in and satisfaction of the community child center. Common risk factors between problem behaviors and school adjustment trajectories were isolation and aggression. Based on the results, the implications for child welfare practices were discussed.

• Journal of the Korean Chemical Society
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• v.16 no.6
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• pp.349-353
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• 1972

The Faddeev-type equations for systems of more than four particles are derived from Weinberg's equation. The derivation is considerably simpler than that by others. The Faddeev-type equations thus derived can be expressed in a matrix form and the rules for constructing the inhomogeneous term and the matrix kernel of the matrix integral equation are formulated and verified explicitly for N=3, 4, and 5.