SiO/TiN 박막의 증착두께에 따른 유전율 특성

김창석,이우선,정천옥,김병인 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.2

In these days, the thinner film of dielectric materials is required while it's capacitance is required to be still large at the VLSI process. Most of such VLSI have MOS structures. For the research on this requirement, MOS capacitors were fabricated on the silicon wafer in four different thickness groups by RF sputtering method. SiO of the SiO/TiN film is used as the insulating layer and TIN is chosen as the barrier against the diffusion of Al which is the terminal connected by ohmic contact because TIN has the advantageous properties such as good thermal stability and very low diffusion rate in spite of it's relatively low specific resistance. In this study their electrical and optical characteristics are investigated to find refractive index, absorption coefficient and Permittivity.

제 3형 급성 견봉-쇄골 관절 분리 환자의 수술적 치료 결과

한성호,양보규,이승림,정선욱,이동호,김민석 대한골절학회 2003 대한골절학회지 Vol.16 No.2

목적 : 본 연구를 통하여 Rockwood 제 3형 급성 견봉-쇄골 관절 분리 환자에서 Phemister 술식과 modified Phemister 술식의 치료 결과를 비교하고자 한다. 대상 및 방법 : 1992년 2월부터 2001년 8월까지 제 3형 급성 견봉-쇄골 관절 분리로 수술적 치료를 받고 1년 이상 추시 가능하였던 45명, 45예의 환자를 대상으로 하였다. 평균 연령은 28.1세였으며, 남자가 42명, 여자가 3명이었다. 진단은 이학적 검사와 단순 방사선 부하 촬영법을 이용하였으며, 수상일로부터 수술적 치료까지의 평균 기간은 7.8일이었다. 술장 소견상 오구-쇄골인대 봉합술이 어려운 15예에서는 Phemister 술식을 시행하였고 (Ⅰ군), 인대 봉합이 가능한 30예에서는 modified Phemister 술식을 시행하였다(Ⅱ군). 수술 후 추시 기간은 평균 16.2개월이었고, 결과 판정은 최종 추시 때의 임상 소견과 이학적 검사 및 방사선 촬영을 통해 UCLA shoulder scoring system과 acromio-clavicular separation scoring system을 이용하였다. 결과 : 술후 합병증은 Ⅱ군에만 표재성 감염이 2예, K-강선 이주가 1예에서 발생하였다. 최종 추시상 전예에서 동통, 관절 운동 범위의 제한은 없었고 , Ⅱ군에서만 방사선 촬영상 2예에서 아탈구가 관찰되었다. UCLA shoulder scoring system은 Ⅱ군에서 우수 93.3%, 양호 6.7%였고, acromio-clavicular shoulder scoring system은 Ⅱ군에서 우수 90%, 양호 10%였다. 결론 : 활동적인 연령에서 발생한 제 3형 급성 견봉-쇄골 관절 손상의 환자에서 Phemister 술식만으로도 좋은 결과를 보일 수 있을 것으로 사료된다. Purpose : The purpose of this study is to compare the Phemister technique with the modified Phemister technique for the patients with Rockwood type 3, acromio-clavicular separation. Materials and Methods : The 45 cases of 45 patients received surgical treatment for Rockwood type 3, acute acromio-clavicular separation in our hospital from Feb. 1992 to Aug. 2001 later with the follow-up study were selected as subjects. The average ages were 28.1 years old, male and female were 42, 3 persons, respectively. Physical examination and plain radiography were used for their diagnosis and the intervals between injury and surgical treatment were 7.8 days. In intraoperative finding, we performed Phemister technique in 15 cases according not to be able to repair coraco-clavicular ligament (groupⅠ), modified Phemister technique in 30 cases according to be able to repair that (groupⅡ). The average follow up period was 16.2 months, and the UCLA shoulder scoring system and the acromio-clavicular separation scoring system were used to obtain clinical results. Results : Only in Group Ⅱ, the complication after surgery were associated with superficial infection in two cases and K-wire migration in one case. At last follow up, there were no pain and limitation of range of motion in all cases, and two cases in Group Ⅱ were found to be subluxation in radiography. Clinical results revealed excellent was 93.3%, good was 6.7% in UCLA shoulder scoring system in both groups, and excellent was 90%, good was 10% for group Ⅱ in acromio-clavicular separation scoring system. Conclusion : The results are considered to be food with only Phemister technique in type 3, acute injury occurred in working ages.

State-Dependent Call Admission Control in Hierarchical Wireless Multiservice Networks

Chung Shun-Ping,Lee Jin-Chang The Korea Institute of Information and Commucation 2006 Journal of communications and networks Vol.8 No.1

State-dependent call admission control (SDCAC) is proposed to make efficient use of scarce wireless resource in a hierarchical wireless network with heterogeneous traffic. With SDCAC, new calls are accepted according to an acceptance probability taking account of not only cell dwell time but also call holding time and system state (i.e., occupied bandwidth). An analytical method is developed to calculate performance measures of interest, e.g., new call blocking probability, forced termination probability, over. all weighted blocking probability. Numerical results with not only stationary but nonstationary traffic loads are presented to show the robustness of SDCAC. It is shown that SDCAC performs much better than the other considered schemes under nonstationary traffic load.

Froedel‘s Kindergarten Merging Into American Context: What Has Changed and What Has Remained?

Shun Ah Chung 한국유아교육학회 2006 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.12 No.1

Korean Policy on Young Children‘s Environmental Health

Shun Ah Chung,Mi Ok Moon 한국유아교육학회 2009 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.15 No.2

In this paper, we will mainly address policy issues for promoting young Korean children‘s environmental health. In specific, we will, first, discuss the global actions of promoting a healthy lifestyle which was established based on WHO‘s MEME (Multiple Exposures-Multiple Effects) model and Children‘s Environmental Health Indicators (CEHI). Second, we present and analyze current recent laws and regulations on children‘s environmental health in Korea by using the MEME model and CEHI. Third, we suggest future directions for establishing policy on young children‘s environmental health. One of our suggestions is to apply the MEME model and implement the CEHI for promoting young children‘s environmental health. We also suggest that environmental education should be used as an indicator of exposure to the environment rather than as a way of prevention and intervention. Finally, we suggest establishing a Children‘s Environmental Health Office which governs all matters of children‘s health.

American Early Schooling Influenced by Social Efficiency and Scientific Measurement Movement from the 1910s to the 1920s

( Shun Ah Chung ) 한국유아교육학회 2008 INTERNATIONAL JOURNAL OF EARLY CHILDHOOD EDUCATION Vol.14 No.2

Teaching Switching Converter Design Using Problem-Based Learning with Simulation of Characterization Modeling

Shun-Chung Wang,Yih-Chien Chen,Juing-Huei Su 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6

In this paper, teaching in a “switching converter (SC) design” course using problem-based learning (PBL) with dynamicbehavior-model simulation, given at Lunghwa University of Science and Technology (LHU), Taiwan, is proposed. The devised methodology encourages students to design and implement the SCs and regulate the controller’s parameters in frequency domain by using ‘sisitool’ (‘bode’) in the MATLAB toolbox. The environment of PBL with converter characterization modeling and simulation reforms the learning outcome greatly and speeds up the teaching-learning process. To qualify and evaluate the learning achievements, a hands-on project cooperated with the continuous assessment approach is performed to modulate the teaching pace and learning direction in good time. Results from surveys conducted in the end of the course provided valuable opinions and suggestions for assessing and improving the learning effect of the proposed course successively. Positive feedbacks from the examinations, homework, questionnaires, and the answers to the lecturer’s quizzes during class indicated that the presented pedagogy supplied more helpfulness to students in comparisons with conventional teaching paradigm, their learning accomplishments were better than expected as well.

Cloud computing with single server threshold and double congestion thresholds

Shun-Ping Chung,Yu-Ju Lu,Yu-Chen Lai 한국통신학회 2018 ICT Express Vol.4 No.3

In this work, we study how to minimize the average system delay in a cloud computing center with heterogeneous servers, where each server may have a different average service rate. We consider M∕Mi∕C∕K with a single server threshold and double congestion thresholds. The analytical models and performance measures are derived for the systems considered. The effect of the average arrival rate on performance measures is studied. It is shown that M∕Mi∕C∕K with a single server threshold and double congestion thresholds outperforms M∕Mi∕C∕K in terms of the average system delay. Finally, a computer simulation is written to verify the accuracy of the analytical results.

한국 근대 유치원의 기원과 성격에 대한 비판적 재고* - ‘私立明信高等女學校附屬幼稚園’ 설립 규칙을 중심으로 -

정선아(Chung, Shun Ah),김병길(Kim, Byoung Gill) 한국어린이교육문화비평학회 2016 영유아교육과정연구 Vol.6 No.2

한국 근대 유치원 교육의 기원과 성격은 서구유치원제도의 도입과 우리나라 유아를 대상으로 한교육에 그 근간을 두고 규명한 결과, 당시 수많은 유치원이 설립되고 운영되었음에도 이의 현실이 부각되지 못하고 있다. 특히 유치원의 운영 및 설립 주체, 성격 등에 대한 연구는 매우 미흡한 실정 이다. 이는 한국 근대 유치원 교육의 기원과 복합성을 조명할 필요가 있음을 시사하고 있다. 이에본 연구는 한국 근대 유치원 교육의 역사 지평을 넓히기 위하여 그간 간과되어 왔던 1900년대 초반 여학교에 부설로 설립된 유치원의 성격을 재조명하여 유치원 교육 기원의 복잡성을 밝히는데 목적이 있다. 특히 명신여학교는 사립 여학교로는 최초로 유치원 설립 규칙을 학교 규칙에 포함시켰 다. 사립 명신여학교는 당시 식민화 정책, 기독교로 대변되는 서구적 가치, 민족주의에 기반한 조선 전통이 상호 길항하는 혼종적 국면속에서 전개되었다고 볼 수 있다. 이에 유치원을 설립운영하지 못하였지만 사립 명신여학교의 유치원 설립 규칙에 나타난 유치원 운영의 성격을 규명하고자 한다. 또한 한국인 유아를 위한 유치원 설립을 시도한 명신여학교의 이념적 모태가 되었을 근대 수신교과 서의 내용을 분석하여 전통 교육과 서구 제도로 알려진 유치원 교육이 어떻게 조응하며 전통을 계승하고 근대의 새로운 이념과 길항하였는지를 밝히는데 있다. 연구 결과, 명신여학교의 유치원 설립 규칙은 현재의 유치원 교육과정과 같이 유치원의 설립 목적, 보육과목, 대상 연령, 원아수, 재원시 간, 운영시간, 휴업일, 학생기록부, 휴원 규정 등 내용이 매우 상세하게 수록하고 있어, 운영의 실제를 엿볼 수 있었다. 또한 명신여학교에서 채택하고 있던 근대 수신교과서는 전통 여성교육과 유치원 교육이 남녀평등, 덕육, 지육, 체육의 조화 즉 양성평등과 전인발달을 이루고자 하는데 목적을 두고 서구적 가치와 전통 교육을 연계하고자 하는 시도가 있었음을 알 수 있다. The purpose of this study is to reconsider the origin and character of modern kindergarten education through reviewing a case of kindergarten principle of Myungsin Women’s High School. In addition, the kindergarten principle of Myungsin Women’s high school which was established by imperial family and royal women reflected the Korean traditional education. In this respect, he character of modern kindergarten needs to be extended from introduction of Western education system to succession of Korean tradition. The origin and character of kindergarten is always written based on the Westernized modern kindergarten system and education of Korean children. Accordingly, many of kindergartens established in Korea were not introduced as well as dealt in the history of kindergartens. In oder to restructure and elaborate its history, we examine the character of the first principles of kindergarten affiliated women’s high school in 1908. Especially, Myungsin Women’s school regulation specifically indicated the rules to establish the kindergarten, such as purpose, subjects, children’s age, duration time, running time, student records, holidays, and etc. The rules are not different from current regulations for establishing daycare and kindergarten. In addition, Myungsin women’s high school education adopted moral education by using ‘Soo-Sin’ textbook which succeeded Korean tradition. Accordingly, its kindergarten education would have been based on the similar contents. What we argue here is that the history of kindergarten was an encountering between the traditional education and Western modern education. In other words, kindergarten education as well as women’s school education was a hybrid and competition between Korean tradition and Western modern education.

‘CO-DESIGN’을 통한 아이들이 놀러오는 학교 놀이터 만들기 사례 연구

정선아(Chung, Shun Ah),김희진(Kim, Hee Jin),박보영(Park, Bo Young),편해문(Phyen, Hae Moon) 한국어린이교육문화비평학회 2020 영유아교육과정연구 Vol.10 No.1

본 연구는 ‘CO-DESIGN’을 통해 학교 구성원과 놀이터 전문가가 학교 놀이터 조성에 참여하는 과정과 그 의미를 탐구하는데 있다. ‘CO-DESIGN’은 놀이터 사용자인 어린이, 교사, 부모 그리고 놀이터전문가가 함께 놀이터 디자인에서부터 조성까지 전 과정에 참여하여 놀이터를 만드는 협력적 참여과정이다. 놀이터 관련 이해 당사자만 놀이터를 디자인하는 과정에 참여하는 ‘참여디자인’을 확장한 개념이다. 연구 방법은 A시 교육청의 ‘아이들이 놀러오는 학교 놀이터 만들기’ 사업에 선정된 두 초등학교에 ‘CO-DESIGN’을 적용한 사례를 분석하는 사례 연구이다. 두 학교의 ‘CO-DESIGN’은 2017년 9월 ~ 2018년 4월까지 약 7개월 간 이루어졌으며, 참여 관찰자로서 연구자는 전 과정을 촬영 및 녹음을 하고, 참여자 인터뷰를 통해 자료를 수집하였다. 연구 결과 두 학교의 ‘CO-DESIGN’ 절차는 ‘놀이터 디자이너와의 만남’, ‘놀이와 놀이터에 대한 관점 세우기’, ‘학교 놀이터 디자인하기’, ‘설계 디자인 공유하기’, ‘시공’, ‘어린이 감리’의 과정으로 이루어졌다. ‘CO-DESIGN’를 통해 만들어진 학교 놀이터의 의미는 다음과 같다. 첫째, 놀이터는 어린이를 중심으로 한 ‘경청의 공동체’에서 만들어졌다. 둘째 모든 참여자들의 수평적 소통으로 만들어진 놀이터이다. 셋째 사용자인 어린이의 놀이에 따라 ‘되어가는 놀이터’ 이다. This research aims to explore the ways in which the members of school community and the play experts take part in building a meaningful place for school playground through ‘CO-DESIGN’. ‘CO-DESIGN’ refers to a cooperative process of building a playground of which participants are from children, parents, teachers and to experts. This is a broader conception of ‘Participatory-design’ in that the existing conception is based only upon the persons concerned. The methodology for this research adopts the case study. It examines the two schools’ ‘CO-DESIGN’ carrying out ‘Building a playground, welcoming children’ in A local school district. This research was conducted for 7months from September 2017 to April 2018. The whole process of this research was filmed and recorded. Also, as a participant observer, it took the various interviews with the participants of ‘CO-DESIGN’. As a result, course of ‘CO-DESIGN‘ was that, ‘Meeting Playground Designers’, ‘Setting a Perspective on Play and Playground’, ‘Designing School Playgrounds’, ‘Sharing Plan Design’, ‘Construction’, ‘Child construction supervision’. Meanings of playground that found out from this research through ‘CO-DESIGN’ come as follows. First, the playground is built upon ‘Community of listening’ with child-centered approach. Second, the playground involves horizontal communication by all participants. Finally, it is ‘Becoming-playground’ of which focus is on children’s playing.