• 부모자녀건강학회지
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• 제10권2호
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• pp.123-135
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• 2007

Purpose: This study was to examine whether there were any differences in perceived social support, self-esteem and behavioral problems between children from broken families who participated in after-school education programs and others from broken families. Method: The subjects in this study were 45 children from dispersed families who were housed in a social-welfare agency in the city of Daejeon. Out of them, 22 children were grouped into an after-school educated group, and the others were selected as a uneducated group. SPSS program was used to analyze the collected data, and statistical data on real number and percentage were obtained. Besides, $x^2$-test and T-test were employed as well. Result: The major findings of the study were as follows: First, the perceived social support intergroup gap between the after-school educated group and uneducated group was not statistically significant. Second, the self-esteem intergroup gap was statistically significant(p<.01). Third, the delinquent behavior intergroup gap was statistically significant (p<.05). Fourth, as for correlational relationship among their perceived social support, self-esteem and behavioral problems, perceived social support has a positive correlation to self-esteem in the educated group(r=0.62, p<.01), and self-esteem was negatively correlated to internalizing problems in that group(r=-0.59, p<.01). The correlation of those factors was statistically significant. Conclusion: It has been confirmed that the after-school education program of broken familie child is very important in the healthy development of the children.

• 디지털융복합연구
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• 제14권9호
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• pp.525-535
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• 2016

본 연구의 목적은 결손가정 중학생과 일반가정 중학생의 긍정심리자본과 학교생활적응의 차이를 검증해보고, 일반가정과 결손가정 중학생의 긍정심리자본이 학교생활에 주는 영향을 비교 및 검증해보고자 하였다. 본 연구결과 첫째, 결손가정 중학생이 일반가정 중학생에 비해 자기효능감, 희망, 탄력성과 낙관성 등의 긍정심리자본이 낮게 나타났다 둘째, 결손가족 중학생이 일반가정 중학생에 비해 학교생활적응 수준도 전반적으로 낮게 나타났다. 셋째, 일반가정과 결손가정 중학생 모두 긍정심리자본과 학교생활적응 수준 간에 높은 정적 상관이 있었다. 넷째, 일반가정 중학생의 경우 긍정심리자본 중 자기효능감, 희망, 낙관성이 학교생활적응에 긍정적 영향을 주었으나, 결손가족 중학생의 경우 긍정심리자본 중 희망만이 학교생활적응에 긍정적 영향을 주었다. 결손가정 중학생의 학교생활 적응과 자기효능감, 희망, 탄력성과 낙관성 등의 긍정심리자본이 모두 긍정적 상관에 있지만, 여러 긍정심리자본 중 희망만이 학교생활 적응에 긍정적 영향을 주며, 이 양상은 일반가정 중학생과 매우 다르다고 할 수 있다. 향후 결손가정 중학생의 학교생활 적응을 위한 상담에서는 여러 가지 상담적 개입이 중요하지만, 특히 삶에 대한 희망을 증진시키도록 노력하고 개발해야 한다는 매우 중요하다는 사실이 규명되었다. 본 연구의 한계점과 향후 연구방향이 논의되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2082-2089
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• 2011

This study is examination of application on site for performance and stability of real-time broken rail detection equipment development system about connection, welded part occurring data errors of broken rail monitoring system. As a result of analysis about data collected in Seoul Metro No.2 Subway from Mar. 2010 to Jan. 2011, we found it is possible to detect crack location(Thermit welding) within the margin of error of ${\pm}1m$ accurately as the first attenuation was -1.2dB and the second was -1.3dB.

• 한국전산유체공학회지
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• 제13권1호
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• pp.28-34
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• 2008

A particle method recognized as one of the gridless methods has been developed to investigate the nonlinear free-surface motions interacting to the structures. The method is more feasible and effective than convectional grid methods for solving the non-linear free-surface motion with complicated boundary shapes. The right-handed side of the governing equations for incompressible fluid, which includes gradient, viscous and external force terms, can be replaced by the particle interaction models. In the present study, the developed method is applied to the dam-broken problem on dried- and wet-floor and its adequacy will be discussed by the comparison with the experimental results.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2007년도 추계 학술대회논문집
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• pp.258-263
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• 2007

A particle method recognized as one of the gridless methods has been developed to investigate the nonlinear free-surface motions interacting to the structures. The method is more feasible and effective than convectional grid methods for solving the non-linear free-surface motion with complicated boundary shapes. The right-handed side of the governing equations for incompressible fluid, which includes gradient, viscous and external force terms, can be replaced by the particle interaction models. In the present study, the developed method is applied to the dam-broken problem on dried- and wet-floor and its adequacy will be discussed by the comparison with the experimental results.

• 한국산업정보학회논문지
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• 제5권4호
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• pp.60-66
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• 2000

본 논문에서는 등고선 자동 벡터화 시스템 개발을 위해 등고선의 끊어짐을 포함하는 스캔된 등고선 이미지에서 등고선을 연결하는 기법을 제안한다. 제안된 기법에서는 등고선의 세선화를 먼저 수행하고 나서 끊어진 선들을 연결한다. 등고선들은 끊어짐이 존재하면 끝점들을 가지므로 이들 끝점 쌍들을 연속적으로 연결하여 하나의 등고선이 하나의 연결요소를 이루도록 연결한다. 제안된 기법은 효율적인 등고선 자동벡터화 시스템을 개발하는데 적용될 수 있다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
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• pp.543-548
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• 2012

The use of glass applied to curved surface as a building material has increased in recent years. However, the curved glass is difficult to guarantee the quality in process of making it into double glazing, So it is vulnerable to thermal breakage. In this paper, when the glass broken during experiments, surface temperature difference on curved double glazing was compared to that of heat strengthened glass and flat glass. As a result, flat single glass was broken at temperature difference of 100~140 degrees but curved double glazing was broken at that of 40~60 degrees. Therefore, curved double glazing is more vulnerable than flat double glazing to thermal breakage, so it should be considered when applied to building facade.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1626-1630
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• 2007

This dissertation finds out trouble types and occurrence regions using the faulty statistics of nondestructive test items in rolling stock parts of the Seoul Metro and using mechanical test about defective and broken parts with broken surface observation, cutting examination about trouble region, hardness experiment and tensile test. Also this dissertation finds out cause of trouble and damage through observation of microscopic formation using metallurgical microscope and scanning electron microscope, residual stress measurement about welding parts and damage diagnosis about defective and broken parts. Moreover it will present the improved plan of nondestructive method about trouble and the removal method of defect and repair welding and find solutions of reliability in parts and preventive maintenance.

• 한국염색가공학회지
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• 제10권2호
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• pp.37-44
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• 1998

In this study, the polyurethane microcapsules containing disperse dye were prepared by in-situ polymerization method using hexamethylene diisocyanate (HDI, aliphatic type) and m-xylene diisocyanate(XDI, aromatic type) with ethylene glycol (EG) And the size, shape, particle size distribution, and breaking behavior of microcapsules prepared were investigated. The size and shape of microcapsule were observed by scanning electron microscope (SEM) . The particle size distribution was analyzed by image analyzer. The breaking behavior of microcapsule was checked by measuring the optical density of solution that the disperse dye was dissolved after the microcapsule was broken by constant pressure. The particle size was inversely proportional to the stirring speed, and the size of microcapsule prepared from HDI and EG was smaller than that of microcapsule prepared from XDI and EG. Aliphatic type microcapsule was broken easily, compared with aromatic type one. It was considered due to the difference of reactivity between HDI and XDI. And the microcapsule prepared by stirring strongly was broken easily.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.552-557
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• 2003

The catenary system used in urban electrification railway have suffered mechanical and chemical stresses. These brought out severe messenger wire problems, these have caused accident. Especially, messenger wire is severely influenced by corrosion, vibration and tension. This paper investigate for the cause analysis of broken accident on messenger wire in catenary system. To analyze the cause analysis of accident, we have conducted experiment such as XRD, SEM, EDX and tensile test.