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윤정훈,안철민,이두연,조철호,김도영,손희영 대한내과학회 1987 대한내과학회지 Vol.33 No.1
Benign solitary schwannoma of the chest wall is rare disease. A 46-year old female patient was admitted to our hospital for the abnormal shadow on the chest roentgenogram. Chest X-ray and CT scan revealed a mass on the left lateral chest wall, Oh left lateral thoracotomy, this mass was turned out to be a hens egg sized mass of the inner chest wall. The mass was excised with ease. Histological section revealed a typical neurilemmoma. A brief rveiw of the literatures is given.
Tetrazole Tethered Polyacrylonitrile Based Gel Polymer Electrolyte for Lithium-ion Batteries
윤정훈,박종혁,이기라 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Gel polymer electrolyte (GPE) based Li-ion battery application have been studied seriously so far. However polymer based GPE exhibit low Li-ion conductivity and mechanical stability, which may be related their limited electrolyte uptake. To solve this problem, I propose to investigate tetrazole tethered PANVDA GPE to gain a better understanding on the effect of interactions between polar nitrile functions and tetrazole functions with lithium ions. The GPEs with a proper amount of liquid electrolyte exhibited a desirable ionic conductivity of 1.22 X 10<sup>-3</sup> S/cm<sup>-1</sup> at 25 ℃, The objective of this study was to correlate the interactions and the electrolyte uptake to the GPE’s electrochemical properties to determine which ratio of PANVDA composition is most favorable to enhancing GPE conductivity. Finally, the PANVDAC GPE was tested in a half cell with lithium metal and LTO composite electrodes leading to a capacity of 127 mAh/g at a discharge rate of 0.5C after 100 cycle.
윤정훈,최윤철,이은진 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 논문집 Vol.23 No.4
In Korean traditional wooden architecture, joint performance varies with the material characteristics of timber, the form of joint, the precisionof timber-trimming and the like. Case studies prove that the beam-to-column joint type has large influence on the degrees of deformation and spacing. This is not only true of single-story buildings, but also of large-scale multi-story buildings more apparently. Therefore, this study followed the processof examining to joint types, producing their specimens and testing their structural performance. As a consequence of structural test, the dovetail jointspecimen showed the best outcomes of the maximum load and rigidity. Synthesizing the structural performances by respective forms of joints, theDoraegeoji dovetail joint specimen showed the higher performance, followed in order by the Doraegeoji mortise joint specimen and the Tongneokodovetail joint specimen. The structural performance of a building varies with the characteristics by the shouldering forms of penetrating beams andwith the joint types within the columns. This should be considered for the new construction or restoration of multi-story buildings, and be continuouslyresearched henceforth. 한국 전통 목조 건축물의 경우 구조적 성능은 재료 특성, 접합부의 형태, 치목의 정밀도 등에 따라 다르게 나타난다. 기존 사례 연구에서도 보와 기둥 접합부 형태는 변형 및 간격의 정도에 큰 영향을 미친다는 것을 보고하고 있다. 이는 단층 건물뿐만 아니라 대규모 다층 건물의 경우에도 마찬가지로 나타나고 있다. 따라서 본 연구에서는 접합부 형태에 대해 분석하고 모형을 제작하고 구조적 성능을 테스트하는 과정을 거쳤다. 그 결과, 주먹장맞춤의 실험체에서 최대 하중을 나타냈다. 각각의 형태의 접합부에 의한 구조적 성능을 종합하면, 도래걷이 주먹장맞춤이 가장 높은 성능을 나타내었으며, 다음으로 도래걷이 장부맞춤의 순으로 나타났다. 건물의 구조적 성능은 관통하는 보의 치목 형태와 기둥 내부의 접합부 형테에 따라 다르게 나타남을 알 수 있었으며, 이는 다층 건물의 신축 또는 복원을 위해 고려되어야하며 이후 계속 연구되어야 할것으로 사료된다.
韓国の大学におけるICT基盤の日本語授業の実践 ーB大学の非同期型の実践を中心としてー
윤정훈,스와 아키히로 중앙대학교 외국학연구소 2021 외국학연구 Vol.- No.55
In this study, we developed ICT-based asynchronous Japanese class content at B University, conducted classes online, provided practical examples, and clarified the results and challenges of classes, suggesting the possibility of ICT-based classes at general universities in preparation for the post-corona era. The significance of this research is as follows. (1) By clarifying the possibility of ICT-based classes at general universities, we were able to present a model for future online classes. (2) One thing to watch out for in asynchronous classes is now clear. (3) Asynchronous class assignments are clarified. The following issues will be addressed in the future. (1) Problems and issues revealed through this study need to be reflected in future classes and further improvements should be made. (2) Detailed analysis is required based on the learning data on LMS. In this study, we developed ICT-based asynchronous Japanese class content at B University, conducted classes online, provided practical examples, and clarified the results and challenges of classes, suggesting the possibility of ICT-based classes at general universities in preparation for the post-corona era. The significance of this research is as follows. (1) By clarifying the possibility of ICT-based classes at general universities, we were able to present a model for future online classes. (2) One thing to watch out for in asynchronous classes is now clear. (3) Asynchronous class assignments are clarified. The following issues will be addressed in the future. (1) Problems and issues revealed through this study need to be reflected in future classes and further improvements should be made. (2) Detailed analysis is required based on the learning data on LMS.