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인상채득 방법이 임플란트 보철 작업모형의 정확도에 미치는 영향
홍은희,한동후,Hong Eun-Hee,Han Dong-Hoo 대한치과보철학회 1994 대한치과보철학회지 Vol.32 No.3
Osseointegrated implant prostheses are to provide normal function without compromising the unique interaction between the tissue and the implant. The essential requirement for the osseointegrated implant prostheses is passive fit of abutment. Therefore, the impression must be accurate and reproduciable since the resultant master cast precisely duplicates the clinical condition. The purpose of this study was to compare the accuracy of the master casts obtained from five impression techniques. Group 1 : To take impression with indirect technique and Impregum F. Group 2 : To take impression with unsplinted direct technique and Impregum F. Group 3 : To take impression with splinted direct technique and Impregum F. Group 4 : To take impression with unsplinted direct technique and Xanthano. Group 5 : To take impression with splinted dierct technique and Xanthano. The results were as follow : 1. In taking impression of Impregum F, there was no significant difference between to use of indirect technique and unsplinted direct technique.(p<0.05) 2. Unsplinted direct technique with Impregum F is less accurate than splinted direct technique with Impregum F or Xanthano and unsplinted direct technique with Xanthano.(p<0.05). 3. There was no significant difference between splinted direct technique with Impregum F and unsplinted direct technique with Xanthano.(p<0.05) 4. Splinted direct technique reproduce more accurate than unsplinted direct technique.(p<0.05) 5. Impression plaster produced less distortion than polyether.(p<0.05) As a result, splinted direct technique with Xanthano was the most accurate technique. As a result, splinted direct technique with Xanthano was the most accurate technique in this study. In addition to dimensinal changes in the materials used, positional errors were also attributed to the mechanical components used in the transfer porocess. Although the errors measured were relatively small, this study demonstrates the potential for distortions with the transfer technique used. Further study is indicated that ?the technique will be able to reproduce the intraoral relationship of implant fixtures reliably and predictably.
홍은희,이영조,옥유진,나명환,노맹석,하일도,Hong, Eun Hee,Lee, Youngjo,Ok, You Jin,Na, Myung Hwan,Noh, Maengseok,Ha, Il Do 한국통계학회 2015 응용통계연구 Vol.28 No.2
연속측도의 반응변수가 반복측정된 실험 자료의 분석을 위해 흔히 선형혼합모형이 사용된다. 그러나, 잔차의 분포가 이분산성이거나 비정규성을 가질 때 표준적인 선형혼합모형은 적절하지 않은 결과를 가져온다. 잔차의 분포가 두터운 꼬리를 가진 비정규분포를 보이는 타이어 필드시험 데이터를 로버스트 선형혼합모형에 적합시킴으로써 보다 더 정확하고 신뢰할 수 있는 분석결과를 얻을 수 있다. 추가적으로 신뢰성 분석 결과를 제시한다. A general linear mixed-effects model is often used to analyze repeated measurement experiment data of a continuous response variable. However, a general linear mixed-effects model can give improper analysis results when simultaneously detecting heteroscedasticity and the non-normality of population distribution. To achieve a more robust estimation, we used a heavy-tailed linear mixed-effects model for a more exact and reliable analysis conclusion than a general linear mixed-effects model. We also provide reliability analysis results for further research.
3D체표면 입체형상을 활용한 20~40대 성인남성의 체형유형별 타이트 핏 토르소원형 설계
홍은희 ( Eun-hee Hong ) 복식문화학회 2021 服飾文化硏究 Vol.29 No.6
The aim of this study was to develop a body type suitable for adult men aged from their 20s to their 40s and to present a method of drafting related patterns. To this end, the somatic surface pattern data from previous studies were used. The research method involved drafting torso patterns for each type by setting and distributing the ease to the somatic surface pattern. Appearance evaluation was performed with virtual clothing. Then, the torso pattern for each body type was completed and presented as a draft method. SPSS was used for data analysis in this study. The research results are as follows. Types 1, 2, and 3 were set to 7%, 6%, 5%; 7%, 6%, 4%; and 6.5%, 7%, and 6% for chest, waist, and hip circumference measurements, respectively. The ratio of front to back was 50%:50%, 50%:50%, and 50%:50% of the spare for each body part for Type 1; 70%:30%, 50%:50%, and 60%:40% for Type 2, and 60%:40%, 70%:30%, and 60%:40% for Type 3. A tight-fit torso pattern for each body type suitable for adult males in their 20s to 40s was drafted, which was modified and supplemented through the evaluation of the first and second virtual wear. Considering the practicality of this approach, for generalization of the patterns, the items of the pattern were converted into a drafting method and presented as a draft method.
성인 남성의 기본 상의 원형 비교 연구 -3차원 가상착의 시스템을 이용하여-
홍은희 ( Eun Hee Hong ),서미아 ( Mi A Suh ) 복식문화학회 2012 服飾文化硏究 Vol.20 No.3
This study did a comparative analysis on the patterns of several male bodice slopers, followed by evaluating the appearance through a virtual garment simulation, which used a three-dimensional virtual garment system. Through this process, this study attempted to comparatively analyze the suitability of the garment or each sloper according to body parts. The analysis of the drawing formulas of bodices slopers had the following results. With a standard chest size, all six slopers had a 1:4 ratio for a front and back chest size; 1:5 or 1:6 for a front and back breast size 1:5 or 1:4 for a neck base circumference; and 1:20 or 1:12 for the chest size. When comparing the anthropometric figures and the actual measurements of each body part for the bodice slopers, the actual measurements secured extra amounts in the drawing process. The evaluation results for appearance of the six men`s bodice slopers showed that the slopers used by companies (E and F) had top scores followed by the slopers made for (C and D), while the sloper for education (A) received the lowest scores. Regarding the results of the variance analysis verifying the significant difference between the slopers, twenty-five items had significant differences with the exception of four items on the front side and one item on the backside.
매체혼탁에 따른 파장가변 빛간섭단층촬영과 스펙트럼영역 빛간섭단층촬영 영상의 질 비교
홍은희(Eun Hee Hong),박승훈(Seung Hun Park),이정욱(Jung Wook Lee),이주향(Ju Hyang Lee),송인석(In Seok Song),이병로(Byung Ro Lee) 대한안과학회 2016 대한안과학회지 Vol.57 No.2
목적: 안구 매체혼탁이 있는 안에서 파장가변 빛간섭단층촬영(swept-source optical coherence tomography, SS-OCT)과 스펙트럼영역 빛간섭단층촬영(spectral domain optical coherence tomography, SD-OCT) 영상의 질을 비교하고자 하였다. 대상과 방법: 정상 40안, 매체혼탁 60안(백내장 30안, 유리체혼탁 20안, 각막혼탁 10안)에서 SS-OCT와 SD-OCT의 6×6 macularscan을 시행하였다. 각 영상에 대해 영상의 질의 객관적 지표로 quality factor (QF)를, 주관적 지표로 subjective grading scale(SGS)을 측정하여 정상안과 매체혼탁안에서의 영상의 질 차이를 비교하고 매체혼탁의 종류와 정도에 따른 영상의 질 차이를 비교하였다. 결과: 정상안과 매체혼탁안 모두에서 SD-OCT에 비해 SS-OCT에서 객관적 지표, 주관적 지표 모두 더 높은 영상의 질을 보였다(p<0.001). SS-OCT와 SD-OCT의 영상의 질 차이는 매체혼탁의 종류에 따른 유의한 차이는 없었고(QF: p=0.188, SGS: p=0.635), SD-OCT QF를 기준으로 매체혼탁의 정도에 따라 분류한 두 군(Group I: 20≤QF<50, II: 0≤QF<20) 간의 비교에서도 유의한 차이는 보이지 않았다(QF: p=0.088, SGS: p=0.051). 결론: SS-OCT는 매체혼탁의 종류나 정도에 관계없이 SD-OCT에 비해 개선된 영상의 질을 보여주며, 이는 매체혼탁안에서 정확한 질병 진단 및 경과 평가에 도움이 될 것으로 여겨진다. Purpose: To compare the image quality between swept-source optical coherence tomography (SS-OCT) and spectral domain optical coherence tomography (SD-OCT), especially in eyes with media opacity. Methods: Forty eyes without media opacity and 60 eyes with media opacity (30 eyes with cataract, 20 eyes with vitreous opacity, and 10 eyes with corneal opacity) were included in this study. SD-OCT and SS-OCT 6 × 6 macular scans were taken by a single operator. For image quality analysis, a total of 200 OCT images were subjectively graded by two trained retina specialists and measured quantitatively using the image quality factor (QF) built into the OCT devices. Results: Compared to conventional SD-OCT, SS-OCT had statistically significantly better subjective and objective grades in the normal group, as well as each of the media opacity groups (p-value < 0.001). In both the subjective and objective grades, there was no significant difference according to the types of media opacity (QF: p = 0.188, subject grading scale [SGS]: p = 0.635) and the degree of media opacity (Group I: 20 ≤ QF < 50, Group II: 0 ≤ QF < 20; QF: p = 0.088, SGS: p = 0.051) in the superiority of image quality of SS-OCT to SD-OCT. Conclusions: In this media opacity patient population, swept-source OCT is a superior diagnostic tool when compared with SD-OCT in both objective and subjective assessments, even in the ocular media opacity. This result may be useful in diagnosis and progression detection of retinal disease in media opacity eyes.