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Development of Diamond-like Carbon Film as Passivation Layers for Power Transistors
Chang, Hoon,Lee, Hae-Wang,Chung, Suk-Koo,Shin, Jong-Han,Lim, Dae-Soon,Park, Jung-Ho The Korean Ceramic Society 1997 The Korean journal of ceramics Vol.3 No.2
Because of the novel characteristics such as chemical stability, hardness, electrical resistivity and thermal conductivity, diamond-like carbon (DLC) film is a suitable material for the passivation layers. For this purpose, using the PECVD, DLC films were synthesized at room temperature. The adhesion and the hardness of the DLC films deposited on Si an SiO2 substrate were measured. The resistivity of 5.3$\times$$10^8$$\Omega$.cm was measured by automatic spreading resistance probe analysis method. The thermal conductivities of different DLC films were measured and compared with that of phospho silicate glass (PSG) film which is commonly used as passivation layers. The thermal conductivity of DLC film was improved by increasing hydrogen flow rate up to 90 sccm and was better than that of PSG film. The patterning techniques of the DLC film developed using the RIE and the lift-off method to form 5$\mu\textrm{m}$ line. Finally, the thermal characteristics of the power transistor with the DLC film as passiviation layer was analyzed.
성창훈 ( Sung¸ Chang-hoon ),김선영 ( Kim¸ Sun-young ),송진규 ( Song¸ Jin-gyu ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
To study on the long-time deflections of Flat-plate slabs considering the removal time of shores, four specimens were manufactured. The days of removal of shores were 6, 12, 18, and 28 day. The current ACI Code and CEB-FIP(1990) Code for one-way slabs were compared with test results. 2 dimensional FEM program using the effective beam width model was applied to analysis of Flat plate slabs. The comparison of the current code with test results was that ACI Code was resemblant in long span but estimated low in short span and CEB-FIP( 1990) Code was estimated a little high at the early ages but was inclined to predict low as time goes on. Furthermore, FEM frame analysis using the effective beam model was reasonable to predict long-term deflections.
청소년의 휴대전화의존이 학교생활적응에 미치는 영향 -진로정체감의 매개효과를 중심으로-
이창훈 ( Lee¸ Chang Hoon ),김현수 ( Kim¸ Hyunsoo ) 한국가족사회복지학회 2021 한국가족복지학 Vol.68 No.3
본 연구의 목적은 청소년이 지각하는 휴대전화의존 정도가 학교생활적응에 어떠한 영향을 미치는지, 그리고 청소년이 지각하는 휴대전화의존 정도와 학교생활적응의 관계에서 진로정체감의 매개효과를 살펴보는 데 있다. 이를 위해 한국 아동·청소년 패널연구의 제6차 패널데이터인 중학교 3학년 학생 2,061명 중, 본 연구의 주제인 휴대전화의존도, 진로정체감, 학교생활적응과 관련된 각 문항에 성실하게 응답한 1,990명의 자료를 대상으로 분석을 실시하였고 그 결과는 다음과 같다. 첫째, 청소년이 지각하는 휴대전화의존도가 학교생활적응에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 청소년이 지각하는 휴대전화의존도가 진로정체감에 유의미한 영향을 미치는 것으로 나타났다. 셋째, 진로정체감은 청소년이 지각하는 휴대전화의존도와 학교생활적응의 관계에서 부분매개효과를 가지는 것으로 확인되었다. 본 연구의 제언에서 연구 결과에 따른 시사점과 제한점을 제시하였다. The purpose of this study is to investigate the effects of mobile phone dependency perceived by adolescents on their adjustment to school life and the mediating effects of career identity on their influential relations. For this purpose, the study examined the data of 2,061 ninth graders in middle school from the sixth panel data of “Korean Children and Youth Panel Survey 2015,” selected the data of 1,990 that provided sincere answers to each of the items related to the topics of the study including mobile phone dependency, career identity, and adjustment to school life, and conducted the three-step mediated regression analysis by Baron and Kenny(1986). The analysis results were as follows: First, mobile phone dependency perceived by adolescents had significant effects on their adjustment to school life; secondly, mobile phone dependency perceived by adolescents had significant effects on their career identity; and finally, career identity had partial mediating effects on influential relations between mobile phone dependency perceived by adolescents and their adjustment to school life. The section of suggestions discussed the implications and limitations of the findings.
Meet in the Middle Attack on CIKS-1
Changhoon Lee 한국정보기술융합학회 2009 한국정보기술융합학회논문지 Vol.2 No.1
본 논문에서는 블록암호 CIKS-1 에 대한 중간-일치 공격을 제시한다. 이 공격은 1-2-64 확률로 CIKS-1 의 마스터 키를 찾을 수 있는 공격으로, 블록 암호의 안전성을 평가하는 관점에서는 상당한 의미를 지니고 있다.
Charles E. Cowman and Martin W. Knapp on the Doctrine of Holiness
Changhoon Park 서울신학대학교 글로벌사중복음연구소 2021 World Christianity and the Fourfold Gosepl Vol.6 No.1
This article aims at studying the relationship between Martin Knapp and Charles Cowman from the theological perspective. Martin Knapp deeply influences on the theological and spiritual formation of Charles Cowman. Surely, there is a difference in that Knapp s book reflects the social and ecclesiastical image of the American churches than Cowman s, and Cowman s book is clearer than Knapp s in that it focuses on holiness theology. Nevertheless, Knapp and Cowman had no doubts that their holiness theology was Wesley s teaching, and they were convinced that fourfold gospel was not much different from Wesley s teaching. In that sense, Knapp and Cowman had the pride that the mainline Methodist Church of their times, stained with American secular, authoritative, and liberal theology, was not Wesley s offspring, but that they were “true Wesleyan” closer to Wesley s will (out of text).
Understanding Spirit-Baptism for the 21st Century Wesleyan Holiness Movement
Changhoon Park 서울신학대학교 글로벌사중복음연구소 2019 World Christianity and the Fourfold Gosepl Vol.5 No.1
From a doctrinal and experiential point of view, if someone finds the identity of the Korea Evangelical Holiness Church in Wesley, it would be a story of looking for Wesley s energizing sense of balance. This is a form of holiness that extends beyond the personal holiness experience and extends into the community of faith and the social/political sphere. However, on the other hand, for those who emphasize the tradition of the holiness movement understanding holiness as the baptism of the Holy Spirit, this could not be fulfilled without this (bodily) experience of the baptism of the Holy Spirit in the process of a gradual godly life pursuing change. And in fact, this entails not only the general phenomenon of the Holy Spirit, but also the (bodily) expectation of a extraordinary instantaneous apparent faith experience. The expectation for this (bodily) experience is clearly one of KEHC s identities. (out of the text)