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Al 5052, 6061합금에 대한 플라즈마-GMA 용접공정특성 평가
김철희,안영남,최진강,이세헌,Kim, Cheol-Hee,Ahn, Young-Nam,Choi, Jin-Kang,Rhee, Se-Hun 대한용접접합학회 2010 대한용접·접합학회지 Vol.28 No.6
In this study, the bead-on-plate welding were conducted by using GMA welding and plasma-GMA welding on Al 5052 and, Al 6061 plates. For these processes, the maximum welding speeds for full penetration were compared, and various weld qualities such as bead appearance, cross-section, cracks and porosities were examined. Faster welding speed, cleaner bead surface and more stable drop transfer could be achieved by plasma-GMA welding, compared with GMA welding.
김철희,황남희,김민경 한국정책분석평가학회 2012 政策分析評價學會報 Vol.22 No.3
본 연구는 청년패널조사를 이용하여 데이터 매칭기법을 통해 청년층 비정규직의 임금페널티를 추정하였다. 그 결과 3.8%의 비정규직 임금페널티가 존재하는 것으로 파악되었다. 학력수준별로 구분하여 분석하면 고졸은 비정규직 임금페널티가 존재하지 않고, 전문대졸 및 4년제졸은 각각 8.4%와 6.5% 존재하는 것으로 나타났다.본 연구의 시사점은 청년층의 비정규직 임금페널티를 해소하기 위해 정부차원의 적극적인 노력이 필요하며, 정부는 노동정책 수립시 목표 집단을 보다 세분화하여 맞춤형으로 이루어지도록 해야 한다는 것이다. 또한 비정규직에 대한 노동정책은 임금차별 시정에 우선순위를 두는 것이 더 바람직할 수 있다는 것이다.
김철희,김종인 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
Architecture in the city is concerned with not only visual context as physical surroundings, but also cultural context including image, memory, a sense of place and the spirit of the time, etc. As time has passed, the museum architecture which is located in a city emphasized the necessity for social function, role and urban context. So the result of this study is that the museum which is located in a city should have reinterpretation of urban context-physical surroundings or cultural factors-and expression the factors.
김철희,임현승 한국통합사례관리학회 2015 한국케어매니지먼트연구 Vol.15 No.-
The purpose of this research study was to explore social support as a moderator in the relationship between depression and suicidal thought in a sample of the public officers in charge of social welfare. This study also examined the impact of depression on suicidal thought among the public officers in charge of social welfare. The samples were 287 public officers in charge of social welfare in Gyeonggi-do. The findings indicate that increased depression is associated with a high level of suicidal thought. The research results show that social support was an important resource for reducing suicidal thought of the public officers in charge of social welfare. As the perception about social support by public officers increased, their level of suicidal thought was decreased. Also, there was an evidence in favor of the moderating role that social support may serve as a protective factor against suicidal thought. Based on the results, counselors such as case manager as well as social workers should consider the importance of understanding and using social support system for suicidal thought of the public officers in charge of social welfare. Finally, these findings are discussed in terms of social work practices and social policies.
Development of New Ethcing Gas for Cu Dry Etching and Dry Etching Process with Small Chelators
김철희,정지원,임은택,김동욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
An etching process is one of the important processing in semiconductor manufacturing. Dry etching is a process of making a circuit on a substrate with gases molecules in high-density plasma conditions. Br<sub>2</sub> and Cl<sub>2</sub> are the most common gases in modern copper dry etching procedure for elimination of substrate materials at high temperature. Although Br<sub>2</sub> and Cl<sub>2</sub> are regarded as useful gases for making a complex with a copper, copper complex remains on the substrate due to low volatility and it makes difficult to form exquisite patterning. To overcome these problems, development of volatile gases is required even after making a complex with copper under low temperature in a dry etching process. Here we introduced many potential volatile gases for a dry etching process. These gases have a high affinity with copper and have a low molecular weight so that evaporate under relatively low temperature.