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        • KCI등재후보

          Celay/In-Ceram, Conventional In-Ceram, Empress 2 전부도재관의 변연적합도에 관한 비교 연구

          양재호,여인성,이선형,한중석,이재봉,Yang, Jae-Ho,Yeo, In-Sung,Lee, Sun-Hyung,Han, Jung-Suk,Lee, Jai-Bong 대한치과보철학회 2002 대한치과보철학회지 Vol.40 No.2

          There have been many studies about marginal discrepancy of single restorations made by various systems and materials. But many of statistical inferences are not definite because of sample size, measurement number, measuring instruments. etc. The purpose of this study was to compare the marginal adaptations of the anterior single restorations made by different systems and to consider more desirable statistical methods in analysing the marginal fit. The in vitro marginal discrepancies of three different all-ceramic crown systems (Celay In-Ceram. Conventional In-Ceram. IPS Empress 2 layering technique) and one control group (PFM) were evaluated and compared. The crowns were made from one extracted maxillary central incisor prepared with a 1mm shoulder margin and $6^{\circ}$ taper walls by milling machine. 10 crowns per each system were fabricated. Measurements or a crown were recorded at 50 points that were randomly selected for marginal gap evaluation. Non-parametric statistical analysis was performed for the results. Within the limits of this study, the following conclusions were drawn: 1 Mean gap dimensions and standard deviations at the marginal opening for the maxillary incisor crowns were $98.2{\pm}40.6{\mu}m$ for PFM, $83.5{\pm}18.7{\mu}m$ for Celay In-Ceram, $104.9{\pm}44.1{\mu}m$ for conventional In-Ceram, and $45.5{\pm}11.5{\mu}m$ for IPS Empress 2 layering technique. The IPS Empress 2 system showed the smallest marginal gap (P<0.05). The marginal openings of the other three groups were not significantly different (P<0.05). 2 The marginal discrepancies found in this study were all within clinically acceptable standards ($100\sim150{\mu}m$). 3. When the variable is so controlled that the system may be the only one, mean value is interpreted to be the marginal discrepancy of a restoration which is made by each system and standard deviation is to be technique-sensitivity of each one. 4. From the standard deviations. the copy-milling technique (Celay/In-Ceram) was not considered to be technique-sensitive in comparison with other methods. 5. Parametric analysis is more reliable than non-parametric one in interpretation of the mean and standard deviation. The sample size of each group has to be more than 30 to use parametric statistics. The level of clinically acceptable marginal fit has not been established. Further studies are needed.

        • KCI등재

          서로 다른 형태의 임플란트의 식립토크가 골에 미치는 열변화에 관한 연구

          김민호,여인성,김성훈,한중석,이재봉,양재호,Kim, Min-Ho,Yeo, In-Sung,Kim, Sung-Hun,Han, Jung-Seok,Lee, Jai-Bong,Yang, Jae-Ho 대한치과보철학회 2011 대한치과보철학회지 Vol.49 No.2

          연구 목적: 임플란트 식립시에 발생할 수 있는 열변화는 임플란트의 실패를 초래할 수 있다. 식립토크에 따른 열변화 양상을 파악함으로 임플란트의 형태에 따른 차이점과 적절한 식립토크가 어떤 것인지 파악하고자 한다. 연구 재료 및 방법: 실험재료로는 두께 15 - 20 mm의 소 견갑골을 가로 35 mm, 세로 40 - 50 mm 크기가 되도록 골편으로 자르고 이중에 피질골의 두께가 2 - 3 mm 되는 표본을 선정한 후 표본의 반을 $36.5^{\circ}C$ 수조에 실온 $25^{\circ}C$에 노출 시켜 내부 온도는 평균 $36.5^{\circ}C$, 표면온도 $28^{\circ}C$가 되도록 설계하였다. $4.5{\times}10\;mm$의 외부육각을 가지는 Br${\aa}$nemark 형태의 임플란트와 $4.8{\times}10\;mm$의 Microthread 형태를 지니는 내부연결 형태의 임플란트를 과도한 식립토크로 식립하고 온도 측정은 계측점에서 0.2 mm 이내에 열전대를 위치시켜 기록하였다. 삼차원유한요소 분석은 골의 형태를 가로 4 cm, 세로 4 cm, 높이 2 cm의 직육면체로 가정하고, 직육면체 윗면에서 2 mm까지를 피질골, 그 아랫부분을 해면골이라고 가정하였다. 마찰열은 매식이 종료된 상황에서 골에 남는 cavity 모양을 기초로 경계조건을 부여하였다. CAD 프로그램인 SolidWorks 소프트웨어를 이용하였고, 이를 유한요소 구조해석용 프로그램인 Abaqus 6.9-1로 불러들여 해석하였다. 결과 및 결론: In vitro실험에서 Microthread type의 임플란트가 상대적으로 더 높은 최고점 온도를 보여주고 있으며 이는 임플란트의 형태에 따른 마찰열 발생이 주요 원인으로 보인다. 유한요소분석을 통해 살펴본 결과 Br${\aa}$nemark 형태의 임플란트의 경우 50 Ncm이상에서 Microthread를 가지는 형태의 경우에는 35 Ncm이상에서 Eriksson 등이 보고한 역치를 초과하는 온도가 발생하였다. 이를 통해 볼 때 Microthread type 이 식립토크에 따른 온도 증가가 더 민감함을 알 수 있다. 실험결과를 통해서 서로 다른 형태의 임플란트 식립시에 임플란트의 형태에 따라 적절한 삽입토크를 부여하는 것이 성공적인 임플란트 시술에 중요한 요소 중에 하나임을 알 수 있었다. 특히 Microthread를 갖는 임플란트 형태는 높은 초기고정성을 얻을 수 있다는 장점이 있는 반면 과도한 식립 토크로 인한 열 손상 가능성을 가질 수 있으므로 골량과 골질의 신중한 평가와 적절한 수술기법이 필요할 것으로 생각된다. Purpose: This study aims at investigating the influence of various insertion torques on thermal changes of bone. A proper insertion torque is derived based on the thermal analysis with two different implant designs. Materials and methods: For implant materials, bovine scapula bone of 15 - 20 mm thickness was cut into 35 mm by 40 - 50 mm pieces. Of these, the pieces having 2 - 3 mm thickness cortical bone were used as samples. Then, the half of the sample was immersed in a bath of $36.5^{\circ}C$ and the other half was exposed to ambient temperature of $25^{\circ}C$, so that the inner and surface temperatures reached $36.5^{\circ}C$ and $28^{\circ}C$, respectively. Two types of implants ($4.5{\times}10\;mm$ Br${\aa}$nemark type, $4.8{\times}10\;mm$ Microthread type) were inserted into bovine scapula bone and the temperature was measured by a thermocouple at 0.2 mm from the measuring point. Finite element method (FEM) was used to analyze the thermal changes at contacting surface assuming that the sample is a cube of $4\;cm{\times}4\;cm{\times}2\;cm$ and a layer up to 2 mm from the top is cortical bone and below is a cancellous bone. Boundary conditions were set on the basis of the shape of cavity after implants. SolidWorks was used as a CAD program with the help of Abaqus 6.9-1. Results: In the in-vitro experiment, the Microhead type implant gives a higher maximum temperature than that of the Br${\aa}$nemark type, which is attributed to high frictional heat that is associated with the implant shape. In both types, an Eriksson threshold was observed at torques of 50 Ncm (Br${\aa}$nemark) and 35 Ncm (Microthread type), respectively. Based on these findings, the Microthread type implant is more affected by insertion torques. Conclusion: This study demonstrate that a proper choice of insertion torque is important when using a specific type of implant. In particular, for the Microthread type implant, possible bone damage may be expected as a result of frictional heat, which compensates for initial high success rate of fixation. Therefore, the insertion torque should be adjusted for each implant design. Furthermore, the operation skills should be carefully chosen for each implant type and insertion torque.

        • KCI등재후보

          스키 리조트 이용자의 여가갈등에 관한 연구

          한우진(Woo Jin Han),이장희(Jang Hee Lee),여인성(In Sung Yeo) 한국여가레크리에이션학회 2005 한국여가레크리에이션학회지 Vol.29 No.-

          Although various studies concerning leisure conflict have been conducted in the U.S, there is little research in this area for Korean. There are many both unasked and unanswered questions in the experience of leisure conflict between or among various leisure activity group. Therefore, an attempt to understand the experience of leisure conflict in ski resort between skier and snowboarder may provide new insights into the nature of leisure conflict of Korean. The purpose of this study was to examine differences of leisure conflict by demographic variables and investigated effect of user’s characteristics in leisure conflict between skier and snowboarder.For this study, 482 participants were selected from 2 ski resorts located in Kangwon Province for one month from January 15th to February 15, 2005, using the convenience sampling method. For the data analysis SPSS 12.0 for Windows version was utilized. The hypothesis tests were conducted with independent t-test, one-way ANOVA, and Multiple Linear Regression to solve problems of the study. On the basis of the results, the conclusions were drawn as follows; 1. There are differences in leisure conflict between or among skier and snowboarder’ demographic characteristics(gender and age group) 2. Leisure conflicts of skier are effected by user’s background in both in-group and out-group. 3. Leisure conflicts of snowboarder are effected by user’s background in both in-group and out-group.

        • KCI등재후보

          즉시 혹은 조기하중 임프란트에 관한 후향적 연구

          이승연(Seong-Yeon Lee),김영균(Young-Kyun Kim),윤필영(Pil-Young Yun),이양진(Yang-Jin Yi),여인성(In-Sung Yeo) 대한치과의사협회 2010 대한치과의사협회지 Vol.48 No.2

          Introduction : In this study, we applied the immediate loading to implant using temporary prosthesis, and compared the treatment results by each placement site, amongst pre-loading period. The study was intended to search for occurrence of complications and the amount of marginal bone resorption. Materials and Methods : We retrospectively reviewed the medical records of 99 cases of implants from 29 patients who were treated at Seoul National University Bundang Hospital from September 2003 to September 2008. We grouped all the cases by placement arches and pre-loading periods, and subdivided each group by placement site(anterior/posterior), type of prosthesis(full-mouth cross splinting/Partial multiple splinting, Single) Results : In the cases of anterior maxilla, the average amounts of marginal bone resorption showed 1.710.71 ±mm in group 1, and 1.44±0.69mm in group 2, which means they revealed no statistically significant difference between group 1 and group 2(p=0.646). In the cases of posterior maxilla, the average amounts of marginal bone resorption showed 1.25 ± 0.72mm in group 1, and 1.14±1.15mm in group 2, which means they were not statistically significant. In the cases of anterior mandible, there was no cases classified as group 4, but the average amounts of marginal bone resorption in group 3 showed 1.38±pm 0.79mm. In the cases of posterior mandible, Group 3 showed 1.39 ±0.64mm, and group 4 showed 1.84 ±1.19mm as amounts of marginal bone resorption, which means they revealed no statistically significant difference between group 3 and group 4(P=0.210). The survival rate of group1 was 97.14%, 92.1% of group3, and 100% of group 2 and group4. According to each type of prosthesis, each average amount of marginal bone resorption revealed no statistically significant difference in maxi11a(p=0.575) in mandible(p=0.206). Conclusion : It is concluded that the marginal bone resorption and the rate of complications might not be affected by placement sites and pre-loading periods. The marginal bone resorption and the rate of complications might vary as different bone quality of placement site and implant system, diameter, length, etc. It is suggested that the proper placement of immediate loading implants decreases the whole treatment period and any inconvenience occurred to patients.

        • KCI등재

          한국 스켈레톤의 경기력 성장 과정 및 배경에 관한 연구

          이세중(Lee, Se Joong),여인성(Yeo, In Sung),곽성현(Kwack, Sung Hyun) 한국전시산업융합연구원 2019 한국과학예술융합학회 Vol.37 No.1

          본 연구는 스켈레톤 종목의 경기력 성장 배경을 객관적이고 거시적인 관점으로 고찰해 보고자 진행되었으며, 구술사와 문헌고찰을 중심으로 질적 연구방법을 통해 연구를 진행하였다. 본 연구를 통해 확인된 한국 스켈레톤 종목의 경기력 성장 과정에 있어서 중요한 사실들을 정리해 보면 다음과 같다. 첫째, 동계올림픽 금메달을 획득한 윤성빈 선수의 발굴은 서울시봅슬레이스켈레톤경기연맹의 창단이 주요한 원인으로 작용 했으며 이러한 과정 속에 강광배의 역할은 매우 컸음을 알 수 있었다. 둘째, 스타트 능력 향상은 육상 스타트 훈련장의 건설과 전문코치를 통한 훈련 및 선수관리의 과학화, 외부 전문기관의 훈련법 지원 등에 의한 결과였다. 셋째, 주행기술 향상은 우수 외국인 지도자들의 도움을 통해 급성장하게 되었는데, 그 중심에는 영국의 크리스챤 브롬리가 있었다. 그는 썰매 제작을 비롯하여 관리 및 셋팅 기술을 지도해 주었으며 트랙별 코스 분석 및 주행기술에도 도움을 주었다. 넷째, 심리적 안정이 중요한 스켈레톤 종목에서 동계올림픽 전 수년에 걸쳐 쌓인 긍정적, 부정적 경험들은 선수를 정신적으로 성장시키는 계기가 되었다. 또한 홈 트랙의 완성은 동계올림픽 전 충분한 연습을 가능케 함으로서 올림픽 자신감으로 이어졌으며, 외부 전문기관으로부터 지원받은 심리안정 강의 또한 도움이 되엇다. 다섯째, 동계올림픽 도전 삼수의 과정은 스켈레톤 실업팀 창단 및 육상스타트 훈련장 완공 등 종목의 경기력에 긍정적인 영향을 주었다. 또한 올림픽 유치 성공에 따른 재정확대로 훈련의 양과 질이 개선되었으며, 최적의 장비 구입은 물론 전문 외국인 지도자를 영입함으로써 경기력은 성장은 정점을 기록하게 된다. This study was conducted to examine the background of growth in performance of skeleton from an objective and macroscopic view, and it is focused on oral history, literature review, and on qualitative research methods. The following is a summary of important facts of the process of growth in performance of Korean skeleton. First, the discovery of Yun Sungbin, who won the gold medal in the Winter Olympics, was an important factor in the establishment of the Seoul Bobsleigh Skeleton Federation and in this process, the role of Kang Kwang-bae was very significant. Second, the improvement in starting was a result of the construction of a sprint start training site and training with specialized coaches, a scientific approach to training and management of athletes, and the support of training methods from external professional organizations. Third, the drastic improvement in driving skills was the result of the assistance of foreign coaches, and this improvement was centered around Kristan Bromley. He directed the manufacturing of the sleds, setting and management of skills, and the analysis of the course and driving skills. Fourth, positive and negative experiences, accumulated over years of practice before the Winter Olympics, played an important role in helping the athletes grow mentally for skeleton events, an event in which psychological stability is important. The completion of the home track enabled sufficient practice before the Winter Olympics and ultimately led to the increase in confidence level for the Olympics, and lessons in psychological stability supported by external professional organizations were also helpful. Fifth, the process of the three attempts in the bid for the Winter Olympics had a positive impact on the performance of the event through the establishment of the business-sponsored skeleton team and the completion of the sprint start training field. In addition, the success in the bid for the Olympics resulted in the expansion of the budget, and this led to an improvement in the quality and quantity of training, purchasing of optimal equipment, recruiting of foreign professional coaches, which in turn resulted in achieving the peak in the improvement of performance.

        • KCI등재후보

          Conventional loading, 여전히 임상적으로 유용한가?

          여인성(In-Sung Yeo) 대한치과의사협회 2013 대한치과의사협회지 Vol.51 No.4

          Implant-supported restorations were connected to commercially pure titanium endosteal implants 3 months in mandible and 6 months in maxilla after the implants were inserted into patient jaws. Modifications of titanium implant surfaces have reduced the waiting time for osseointegration, resulting in the development of the early loading concept, which is defined at present as a restoration in contact with the opposing dentition and placed at least 1 week after implant placement, but no later than 2 months afterward. Nowadays, immediate loading protocols have also been introduced, using the implants that are designed to enhance initial stability. Immediate loading eliminates the edentulous period of a patient. Although dentists widely accept these concepts of early and immediate loading, they agree the conventional loading concept is still necessary, which describes loading protocols later than 2 months after implant insertion. The timing of loading is determined mainly by the factors of a patient. This paper considers for what dental clinicians should be careful in implant-supported restoration procedures, considering the implant late failure.

        • KCI등재

          Historical changes in Buddhism for the philosophical bases of Physical education and sport .

          In Sung Yeo(여인성) 한국체육철학회 1996 움직임의철학 : 한국체육철학회지 Vol.4 No.1

          신체문화와 교육, 심신관등은 시대적, 국가적 독특한 철학사상 및 문화특성에 따라 달리 해석되고 체육활동은 민속오락 및 종교적 기능으로부터 여가, 레크리에이션의 역할까지 그 범위나 활동영역에 있어서 매우 다양한 면을 보여왔다. 기원전 6세기경 인도에서 시작한 불교는 동양의 기본적 철학과 사상의 밑바탕으로서 인간생활의 다양한 분야에 큰 영향을 주어왔다. 특히 심신관과 관련해서 불교의 존재론적 교의 및 가르침은 일원론적 심신관의 이론적 토대를 제공함으로써 심신의 조화로운 발달과 이를 바탕으로 한 전인교육을 위한 체육교육의 가치 및 중요성을 일깨워 주고 있다. Siddhartha Gautama의 가르침에 따른 종교적, 철학적 측면에서 불교의 본질적인 구조와 중심사상은 바뀌지 않았으나 다양한 불교학교, 학파들의 해석과 주장에 따라 또는 각국의 고요한 문화적 배경과 발전을 거듭하여 왔다. 불교는 역사적 측면에서 볼 때 여러 가지 형태로 나뉘어지나 크게 Theravada와 Mahayana로 대표되어 진다. Mahayana 따르면 진정한 자아는 모든 사물과 긴밀한 연관을 갖고, 형이상학적 이상이 아닌 경험을 통해서 느낄 수 있다. 즉, 자기수련을 통한 스스로의 깨우침과 표현, 주관적 경험과 창조적인 교육이 강조된다. 이와같은 불교사상은 개인의 경험을 강조하는 실용주의적 체육철학에서도 보여지며 특히 동양의 전통적 체육활동, 무도교육 및 정신확립에 지대한 영향을 마쳤다.

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          신체활동과 스포츠 경험에 있어서 현상학과 SOMATIC 심신관의 비교

          여인성(Yeo, In-Sung) 한국체육철학회 1997 움직임의철학 : 한국체육철학회지 Vol.5 No.1

          There are many conceptions about the body-mind according to an one`s philosophical views and interpretations based on different culture, religion, tradition, and academic disciplines. These different concepts of body and mind have influenced various aspects of human lives. The status and role of physical education and sport have been significantly affected by the interpretation of the body-mind relationship. The concept of the relationship between body and mind has an intimate connection with `knowing and experience` in physical education. In recent centuries, there have been philosophies regarding the unity or totality of the mind-body and the holistic concept of the body-mind experience in Western culture. In Western philosophy, there have been attempts, including existential, phenomenological and somatic approaches. These approaches provide us with theoretical and practical guides for an understanding of the human being`s body-mind experience. The phenomenological and somatic approaches are fundamentally differently from those which hold traditional dualistic conception of body and mind. I believe that the following characteristics of phenomenology and somatics promise to provide significant insights to the field of physical education and sport : the wholistic notion of mind and body, the analysis of the lived body and the body-mind experience, and the nature of somatic process as self-sensing and self-regulating.

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          동양무도사상의 소매틱 교육적 의미에 관한 연구

          여인성(In Sung Yeo) 한국체육철학회 2001 움직임의철학 : 한국체육철학회지 Vol.9 No.2

          This study was to interpret the educational meaning of Somatics including on the Eastern philosophy of Martial arts. In order to explain this, this study suggested three discursive questions: 1) what is the Somatic education?; 2) what is the body culture involved on the Eastern philosophy of Martial arts; and 3) if there are related together, how do we combined with each other? Based on these questions, this study pursued to analyze the possibility of understanding Somatic education and Eastern philosophy by using literature review. This trial has involved on the meaning that Somatic education makes it possible to solve the limitation of current notion and issue for the thought of the body and mind, and to suggest new direction of academic realm of physical education.

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