임플란트 상부보철물의 유지형태에 따른 3차원 유한요소 응력분석

이성천,김석규,Lee, Sung-Chun,Kim, Seok-Gyu 대한치과보철학회 2009 대한치과보철학회지 Vol.47 No.4

Statement of problems: Stress analysis on implant components of the combined screw- and cement-retained implant prosthesis has not investigated yet. Purpose: The purpose of this study was to assess the load distribution characteristics of implant prostheses with the different prosthodontic retention types, such as cement-type, screw-type and combined type by using 3-dimensional finite element analysis. Material and methods: A 3-dimensional finite element model was created in which two SS II implants (Osstem Co. Ltd.) were placed in the areas of the first premolar and the first molar in the mandible, and three-unit fixed partial dentures with four different retention types were fabricated on the two SS II implants. Model 1 was a cement-retained implant restoration made on two cement-retained type abutments (Comocta abutment; Osstem Co. Ltd.), and Model 2 was a screw-retained implant restoration made on the screw-retained type abutments (Octa abutment; Osstem Co. Ltd.). Model 3 was a combined type implant restoration made on the cement-retained type abutment (Comocta abutment) for the first molar and the screw-retained type abutment (Octa abutment) for the first premolar. Lastly, Model 4 was a combined type implant restoration made on the screw-retained type abutment (Octa abutment) for the first molar and the cement-retained type abutment (Comocta abutment) for the first premolar. Average masticatory force was applied on the central fossa in a vertical direction, and on the buccal cusp in a vertical and oblique direction for each model. Von-Mises stress patterns on alveolar bone, implant body, abutment, abutment screw, and prosthetic screw around implant prostheses were evaluated through 3-dimensional finite element analysis. Results: Model 2 showed the lowest von Mises stress. In all models, the von Mises stress distribution of cortical bone, cancellous bone and implant body showed the similar pattern. Regardless of loading conditions and type of abutment system, the stress of bone was concentrated on the cortical bone. The von-Mises stress on abutment, abutment screw, and prosthetic screw showed the lower values for the screw-retained type abutment than for the cement-retained type abutment regardless of the model type. There was little reciprocal effect of the abutment system between the molar and the premolar position. For all models, buccal cusp oblique loading caused the largest stress, followed by buccal cusp vertical loading and center vertical loading. Conclusion: Within the limitation of the FEA study, the combined type implant prosthesis did not demonstrate more stress around implant components than the cement type implant prosthesis. Under the assumption of ideal passive fit, the screw-type implant prosthesis showed the east stress around implant components.

국악교육의 현황과 발전을 위한 과제

이성천,Lee, Seong-Cheon 한국대학교육협의회 1994 大學敎育 Vol.69 No.-

국악과 교육의 현황과 문제점

이성천,Lee, Seong-Cheon 한국대학교육협의회 1987 大學敎育 Vol.25 No.-

Butyl, Chlorobutyl Rubber의 가황

이성천,Lee, Seong-Cheon 대한타이어공업협회 1967 타이어 고무 Vol.8 No.-

노인병 인정의 양성 교육: 만족도와 현실성

이성천,김화준,박형준,윤종률,김창엽,문옥륜,장숙랑,Lee, Sung-Chun,Kim, Hwa-Joon,Park, Hyung-Joon,Yun, Jong-Lull,Kim, Chang-Yup,Moon, Ok-Ryun,Jang, Soong-Nang 대한예방의학회 2008 예방의학회지 Vol.41 No.1

Objectives : Korea faces a number of challenges to meet demands in the area of geriatric professional medicine in a country with a rapidly ageing population. We evaluated the satisfaction and feasibility of the current education certification for geriatric physicians. Methods : Geriatric physicians who were deemed qualified by the Korean Geriatrics Society during the period of 2001 to 2005 (n=2,200) were asked to complete structured questionnaires sent to them by mail about their satisfaction of and need for certificates of education, as well as their opinions on their geriatric specialty training. A total of 419 physicians responded. Descriptive analysis and hierarchical regression were performed to rate the respondents' satisfaction, the characteristics of the need for clarity and utility in education certification, and the characteristics of their patients. Results : Although most respondents were satisfied with their education certification, those who had more elderly patients, aged 65 or older, and those who had more cognitively impaired patients, rated their education as significantly lower than did other physicians. Both groups expressed the need for more the comprehensive care and assessment concerning of their education. Multiple regression analysis indicated that satisfaction with geriatric physician qualification was associated with a physician's age, specialty, and percentage of elderly patients. Conclusions : This study suggests that the current system of education certification is limited in terms of feasibility and physician satisfaction.

Butyl, Chlorobutyl Rubber의 가황(2)

이성천,Lee, Seong-Cheon 대한타이어공업협회 1967 타이어 고무 Vol.9 No.-

재만 시인 심연수 문학의 실증주의적 고찰

이성천 ( Lee Seung-cheon ) 국제어문학회 2014 국제어문 Vol.60 No.-

The purpose of this research is to positively consider the literature of Shim, Yeon- Su`s, Korean poet in the Manchuria. Since the beginning of the 21st century, there has been a continuous research from China and Korea, on Shim, Yeon-Su(1918.5.20-1945.8.8), who wrote during the Japanese colonial era. However, I came up with the conclusion that there had been serious limitations on the existing researches for the literature of Shim, Yeon-Su, including all the logical contradiction and willful distortion. The latest researches, nevertheless, indiscriminately embrace on the previous research results and continuously reproduce what had been already done. This research gradually reviews the logical contradiction and limitation, and immaturity over procuring positive reference which had been exposed by the previous researches. The details would include the error of the previous researches during the process of interpreting the text, historical contradiction in relation to the biological facts of the poet and positivist consideration of the graduation date of the < Japanese University >. This research proposes, with the help of the research on rare books, that the poetic subject consciousness may be differently interpreted depending on what type of text were chosen and that the previous researches did not hold somewhat an objective view in them. Through this research, I have also made an request for the reconsideration of the fact that Shim was taught the literature class from Kang, Kyung-Ae, the novelist during his academic days in middle school and the fact that Shim had returned to Manchu trying to avoid the student soldier in July 1943. While conducting researches on Shim, I have discovered new positive references including < Japanese University Newspaper > and alumni directory which had details of the graduation ceremony of < Japanese University > in 1943 where Shim had attended and the list of < Professional Arts and Creation >, and have attached them in the research so that the follow-up discussion may be proceeded. It should be certainly noted that the purpose of this research is identical to the ones of the previous researches which sought for a better understanding of the truth of the literature of Shim, Yeon-Su.

재만 시인 심연수 일기문의 비판적 검토

이성천(Lee, Seung-cheon) 한국시학회 2016 한국시학연구 Vol.- No.48

이 논문은 재만 시인 심연수의 일기문을 비판적으로 검토하는 데 목적이 있다. 그간에 심연수 시인은 한․중 학계에서 공통적으로 1940년대 재만 조선인 문학을 대표하는 민족시인, 혹은 저항시인으로 높은 평가를 받아왔다. 그러나 본고가 판단하기에 이제까지 전개된 대다수의 선행연구들은 논리적 모순과 의도적 왜곡 등 적지 않은 문제점을 드러내고 있다. 특히 그를 민족시인 또는 항일시인으로 규정한 논의의 경우, 실증적 자료와 부합하지 않는다거나 역사적 사실에 위배되는 양상을 보여준다. 이에 따라 본고에서는 전집에 수록된 전체 일기문을 면밀하게 분석하고, 이를 바탕으로 심연수 시인이 일제강점하의 역사적 모순이나 민족적 현실에 대한 자각이 다소 부족했으며, 오히려 일제의 왜곡된 지배이데올로기에 노출된 측면이 있다는 사실을 밝히고자 했다. 이 과정에서 본고는 ‘원천적 기록’으로서 심연수 일기문의 실증적 가치를 제시하고, 이후 그의 일기에 나타난 ‘민족동화정책’, ‘내선융화’, ‘동아협동체’, ‘동아신질서’ 사상 등의 흔적을 살펴보았다. 이와 아울러 ‘근로봉사’와 같은 만주국의 국책사업에 적극적으로 동조한 시인의 현실인식 능력을 비판했다. The purpose of this paper is to Critical inquiry for diary of Shim Yeon-Su’s, Korean poet in the Manchuria. Since 2000, he has recently studied intensively for the academic circles to, South Korea and China. In the meantime, Shim Yeon-Su’s, Korean poet received a high opinion as poet resistance or national poet representing the 1940’s literature of Korean poet in the Manchuria for the academic circles to, South Korea and China in common. However, I came up with the conclusion that there had been serious limitations on the existing researches for the literature of Shim, Yeon-Su, including all the logical contradiction and willful distortion. In particular, anti-Japanese him as a poet that is different from historical facts. Accordingly, I thoroughly analyze contents of the total contained in the corpus of the diary. Based on this, this paper wish to find out that Shim Yeon-Su’s, Korean poet didn’t realize historical contradiction and national realities during the Japanese colonial era at all and that rather, he was unprotected exposure to the ideological divide of Japan’s distorted rule. In the process, I proved the objective value of diary of Shim Yeon-Su’s as original record and criticized his real awareness written in diary of Shim Yeon-Su’s for example traces of thought about ‘East Asian new order’ and active sympathy for labor service as National projects of Manchuria.

『주체문학론』 이후의 북한시 연구

이성천 ( Seong Chun Lee ) 한민족문화학회 2006 한민족문화연구 Vol.19 No.-

The purpose of this thesis is to gain wide picture of the stream of North Korean Poems after the publication of Kim Jung-il`s `Juche Literary Theory`. The `Juche Literary Theory` published on 1992 functioned as textbook for the creative writing of North Korea until these days. This fact is confirmed by the pieces from North Korean magazine <Joseon Literature> that follows the creative standards proposed in `Juche Literary Theory`. Even though slightly different depend on time and matter, it primarily operates as a ideological weapon against imperialism and the United States or a strong tool for maintenance of Kim Il-sung and his son`s power and North Korean socialism system focused on the party, people and leader. Therefore the works based on `Juche Literary Theory` are laid upon the prolongation of North Korean literature tradition that reproduces the ideology of the Communists. This tradition of creative writing of North Korea, that is, literature depended on socialism recently called as `Juche Literary Theory`. On the other hand, creative writing and literature theory accepted the principal policies of 1990`s. In this period, the main stream of North Korean literature sensitively deals with political issue, namely `Red Flag Phenomenon`, `Marching of Hardship`, `Big Country and Songun Policy` and so forth. Especially, from the 90`s, a series of works emerged that formalize the spirit of the age, `Songun Policy`, as it became the North Korean`s principal political issue. So to speak, `Songun Policy` is the North Korean national management system of military first politics that insist on the succession of predecessor`s revolutionary achievement. Around 1998, the North Korea formally announced `Songun Policy` for the inside and outside of the country. Nowadays, `Songun Policy` is regarded as <Almighty Political Method> and thus most of the North Korean literature claims the literature of Songun revolution that literarily formalize `Songun Policy` until late. This shows the specific character of the North Korean literature that regards political belief as aesthetic practice. In addition, time-honored subject of the North Korean literature, Kim Il-sung and his son`s idolization, anti- imperialism and anti- America are strengthened in the time span. That is a significant phenomenon of the North Korean literature in the period of Songun Policy.

김일엽 문학에 나타난 신여성: 담론 고찰

이성천 ( Seong Chun Lee ) 한민족문화학회 2012 한민족문화연구 Vol.39 No.-

This paper about a Kim, Il-Yeop appeared in the literature on ``New Women`` discourse intended. Kim, Il-Yeop is Korean modern literature discussion never got to be putting one of the major writers are not. It is only a few of her early modern women writers and artists called the scarcity of advances in time would suspect as provocative as she imagined ``stranger`` literary system. Nevertheless, the study of Kim, Il-Yeop literature ever, somewhat passive as negative. First, in 1920 she published one of the first women`s magazine ``Shin Yeo Ja(New Women)`` in this period her think on the limitations and possibilities. In this process, and this is an idea that Kim, Il-Yeop`s literary self contradictory logic inherent in the fact that last name, to point out the reality of the 1920s, the community on the issue of the feminist ``Women``s Liberation`` of the level of awareness with respect to the discussion. The following are seen as Japan`s <Motherhood protection controversy> and Kim, Il-Yeop will scan the system of the correlation. In this process, the existing research are comprehensive and holistic approach has failed to try, as a result, the existing discussion on the literature of the world`s intact, a proper understanding of the literature of the world not reached will prove that. Since the last time you saw an her Buddhist literature research of present situation and future challenges.