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임명진,이광원 대한치과보존학회 2017 Restorative Dentistry & Endodontics Vol.42 No.1
Objectives: The purpose of this study was to evaluate the effect of adhesive luting on the fracture resistance of zirconia compared to that of a composite resin and a lithium disilicate glass ceramic. Materials and Methods: The specimens (dimension: 2 mm x 2 mm x 25 mm) of the composite resin, lithium disilicate glass ceramic, and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) were prepared. These were then divided into nine groups: three non-luting groups, three non-adhesive luting groups, and three adhesive luting groups, for each restorative material. In the nonluting groups, specimens were placed on the bovine tooth without any luting agents. In the non-adhesive luting groups, only zinc phosphate cement was used for luting the specimen to the bovine tooth. In the adhesive luting groups, specimens were pretreated, and the adhesive luting procedure was performed using a self-adhesive resin cement. For all the groups, a flexural test was performed using universal testing machine, in which the fracture resistance was measured by recording the force at which the specimen was fractured. Results: The fracture resistance after adhesive luting increased by approximately 29% in the case of the composite resin, 26% in the case of the lithium disilicate glass ceramic, and only 2% in the case of Y-TZP as compared to non-adhesive luting. Conclusions: The fracture resistance of Y-TZP did not increased significantly after adhesive luting as compared to that of the composite resin and the lithium disilicate glass ceramic.
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임명진 전북대학교 인문학연구소 2018 건지인문학 Vol.0 No.21
The aim of this paper is to examine the subjects of generation successions in the literary works of Chae, Man-sik. The Chae’s works abounds with the generation motives. In order to explain the generation motives, I am willing to borrow a term, namely, ‘meme’ that conceptualized by Richard Dawkins. I think,‘Meme’is a useful term to overhaul the subject of the generation succession in Chae’s works The generation motives in Chae’s works are represented on the following fives aspects, i.e. ① discontinuations of the ‘meme’, ② complications and discords between the old/new generation, ③ isolations of the ‘meme’, ④ possibilities of the new ‘meme’, and ⑤ strengthening of the old ‘meme’. The time backgrounds of the works (that represents the generation motives) are ‘Japanese colonial period’ or ‘Liberation years’. These backgrounds are available for understanding the generation succession and motives. The subjects of generation exhibit historical questions. In the Chae’s works, the historical problems in Japanese occupational years’ or ‘Liberation years’ express the unfairness of the old generation. The writer Chae, in the main works, bitterly criticizes the problems of the old generation. But, he clearly does not present a prospection of new generation. Just at this point, the nihilistic consciousness of the writer Chae are revealed.
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임명진,김판구,신주현 (사)한국스마트미디어학회 2020 스마트미디어저널 Vol.9 No.2
지상파에 한정되어 방영되었던 과거와는 달리 현재는 케이블 채널과 인터넷 웹에서도 수많은 드라마가 방영되고 있다. 드라마를 보고난 후 시청자들은 리뷰를 통해 적극적으로 자신의 의견을 표현하고 이러한 리뷰의 분석에 관련된 연구들이 활발하게 진행되고 있다. 드라마의 특성상 장르가 뚜렷하지 않고 시청자의 다양한 연령층으로 인해 다른 시청자들의 리뷰와 평가는 어떤 드라마를 볼 것인지 결정하는데 도움이 된다. 하지만 많은 리뷰를 시청자가 일일이 확인하고 분석하는 것은 어렵기 때문에 자동으로 분석하기위한 데이터 분석 기법이 필요하다. 이에 본 논문에서는 드라마 선택에 중요한 영향을 미치는 리뷰의 토픽을 분류하고 단어의 의미 유사도에 따라 의미적 토픽으로 재분류한다. 그리고 리뷰를 의미적 토픽에 따른 문장으로 분류한 다음 감성 단어를 통해 감성을 분석하는 모델을 제안한다. Unlike the past, which was limited to terrestrial broadcasts, many dramas are currently being broadcast on cable channels and the Internet web. After watching the drama, viewers actively express their opinions through reviews and studies related to the analysis of these reviews are actively being conducted. Due to the nature of the drama, the genre is not clear, and due to the various age groups of viewers, reviews and ratings from other viewers help to decide which drama to watch. However, since it is difficult for viewers to check and analyze many reviews individually, a data analysis technique is required to automatically analyze them. Accordingly, this paper classifies the topics of reviews that have an important influence on drama selection and reclassifies them into semantic topics according to the similarity of words. In addition, we propose a model that classifies reviews into sentences according to semantic topics and sentiment analysis through sentiment words.
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이방성 전도 접착제 물성과 유기 기판 플립 칩의 신뢰성에 미치는 비전도성 충진재의 영향
임명진,백경욱,Im, Myeong-Jin,Baek, Gyeong-Uk 한국재료학회 2000 한국재료학회지 Vol.10 No.3
비전도성 충진재를 포함한 개선된 이방성 전도 접착제의 열적/기계적 특성과 이를 이용한 유기 기판용 플립 칩의 신뢰성에 미치는 충진재 양의 영향을 고찰하였다. 비전도성 충진재 양이 다른 개선된 이방성 접착제의 특성을 살펴보기 위해 differential scanning calorimeter (DSC), thermo-gravimetric analyzer (TGA), dynamic mechanical analyzer (DMA), thermo-mechanical analyzer (TMA)을 사용하였다. 비전도성 충진재의 양이 증가함에 따라 열팽창계수는 감소하였고, 상온에서의 storage modulus는 증가하였다. 추가로, 충진재의 양이 증가하면 DSC에 의한 유리전이온도와 TMA에 의한 유리전이온도도 증가하였다. 그러나 TGA 거동은 거의 변화가 없었다. 이방성 전도 접착제를 사용한 유기 기판 플립 칩의 신뢰성 테스트를 위해 열주기 시험, 고온고습 시험, 고온건조 시험을 수행하였는데, 주로 열주기 시험에서 이방서 전도 접착제의 열팽창계수의 영향이 컸다. 비전도성 충진재를 포함해서 낮은 열팽창계수와 높은 storage modulus를 갖는 이방성 전도 접착제에 의해 부착된 플립 칩의 신뢰성이 비전도성 충진재를 포함하지 않은 이방성 전도 접착제에 의한 플립 칩의 신뢰성보다 더 좋게 나타났다. We investigated the effect of filler content on the thermo-mechanical properties of modified ACA composite materials by incorporation of non-conducting fillers and the reliability of flip chip assembly on organic substrates using modified ACA composite materials. For the characterization of modified ACA s composites with different content of non-conducting fillers, differential scanning calorimeter (DSC), and thermo-gravimetric analyzer (TGA), dynamic mechanical analyzer (DMA), and thermo-mechnical analyzer (TMA) were utilized. As the non-conducting filler content increased, CTE values decreased and storage modulus at room temperature increased. In addition, the increase in the content of filler brought about the increase of Tg^{DSC}$ and $Tg^{TMA}$. However, the TGA behaviors stayed almost the same. Contact resistance changes were measured during reliability tests such as thermal cycling, high humidity and temperature, and high temperature at dry condition. It was observed that reliability results were significantly affected by CTEs of ACA materials especially at the thermal cycling test. Results showed that flip chip assembly using modified ACA composites with lower CTEs and higher modulus by loading non-conducting fillers exhibited better contact resistance behavior than conventional ACAs without non-conducting fillers.
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