http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Soft, adhesive and conductive composite for electroencephalogram signal quality improvement
Jeong E Jin,Seohyeon Kim,Hyeji Yu,Keyong Nam Lee,Young Rag Do,Seung Min Lee 대한의용생체공학회 2023 Biomedical Engineering Letters (BMEL) Vol.13 No.3
Since electroencephalogram (EEG) is a very small electrical signal from the brain, it is very vulnerable to external noise ormotion artifact, making it difficult to measure. Therefore, despite the excellent convenience of dry electrodes, wet electrodeshave been used. To solve this problem, self-adhesive and conductive composites using carbon nanotubes (CNTs) in adhesivepolydimethylsiloxane (aPDMS), which can have the advantages of both dry and wet electrodes, have been developed bymixing them uniformly with methyl group-terminated PDMS. The CNT/aPDMS composite has a low Young's modulus,penetrates the skin well, has a high contact area, and excellent adhesion and conductivity, so the signal quality is enhanced. As a result of the EEG measurement test, although it was a dry electrode, results comparable to those of a wet electrode wereobtained in terms of impedance and motion noise. It also shows excellent biocompatibility in a human fibroblast cell test anda week-long skin reaction test, so it can measure EEG with high signal quality for a long period of time.
[논문]보양조건 및 타설주기를 고려한 매스 콘크리트 구조물의 수화열 해석
이영호,서기영,최덕락,엄장섭,진치섭* 釜山大學校生産技術硏究所 2004 生産技術硏究所論文集 Vol.63 No.-
콘크리트 구조물의 공용수명은 콘크리트 재료의 초기에 발생하는 수화열에 의해 아주 큰 영향을 받는다. 수화열은 콘크리트의 열전달 및 열응력 특성으로 결정되어지는 온도균열지수를 통해 분석되고 있다. 본 연구에서는 이러한 온도균열 지수의 분석을 통해 매스 콘크리트 구조물의 시공시 적절한 시벤트 종류, 보양방법,타설주기 및 타설높이 둥 최적의 시공방안 구하는데 도움을 주어 향후 시공 예정인 매스 콘크리트 구조물에 발생 가능한 온도균열을 미리 예측하여 이를 방지하기 위한 시공 방안을 제안하는데 그 목적을 두고 있다.
고등학교 화학과 일반화학에서 반응속도에 대한 내용 및 실험의 비교 고찰
지종기,손영락 慶北大學校 師範大學 1990 敎育硏究誌 Vol.32 No.-
Chemical Kinetics is a field of chemistry connected with chemical rate and chemical reaction mechanism. Today the plants and chemical procession of many chemical factories are planned to produce things in large quantities fast and economically. Therefore the importance of this chemical kinetics, connected with chemical procession, goes on increasing. So this paper will be useful for the teaching methods of high school chemistry and general chemistry in university as comparing and analyzing the contents and experiments of chemical kinetics in newly revised high school chemistry textbooks, general chemistry in university, chem study, and American textbooks(chemistry ; the study of matter). The results are as follows. 1. Comparing the relative importance of chemical kinetics in newly revised high school chemistry textbooks, university general chemistry, chem study, and American chemistry textbook total pages of newly revised high school chemistry textbooks are simillar to the others but interesting pictures and problems are short and chemical equations are too much. So as far as economical cirumstances permit, colorful pictures and photos or examples of the newest high technology must be used to arose interest. 2. Comparing the contents of newly revised high school chemical textbooks, the quantity of contents and reaction mechanism are not the same. So the contents must be complemented and amendmented. 3. Taking into account of the importance of chemical industry and chemical kinetics in everyday life, the contents must be complemented with examples observed in real life and applied field in chemical industry to arose interest. 4. Reducing the difference of high school textbooks and general chemistry in university and putting the concepts for mathmatical thinking into high school textbooks, we must make consistent contents. 5. Experimental process must be complemented and amended to be a systemic experiment considering the connection with theory. 6. The experiments of chemical kinetics in a high school chemical process are much weaker than college chemistry. So the experiments of chemical kinetics must be richer and the experiment of determining reaction order must be complemented.
정락교(Rag-Gyo Jeong),윤용기(Young-Ki Yoon),김백현(Beak-Hyeon Kim),김용규(Young-Kyu Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
국가기간 교통망 계획의 기본방향으로 속도향상, 접근성 개선 등으로 간선철도의 경쟁력과 역할 증대가 제시됨에 따라 속도경쟁력 대폭 향상방안으로 운행속도 180㎞/h~200㎞/h 이상, 대도시간 2~3시간 이내 이동 및 접근성 개선 사항으로 주요 철도역에 30분 이내 접근, 안전성, 친환경성, 쾌적성 등 향상을 통한 인간 · 환경 중심적 교통수단으로서 역할 강화라는 화두가 제시되었다. 이에 고속화 간선철도망 구축을 위한 분야별(차량, 토목구조물, 전차선 등)방안이 제시 되었다. 이에 신호시스템 분야에서는 기존의 시스템을 파악하여 속도별로 시스템의 적합성내지 타당성을 통해 각 변수(폐색, 제동거리 등)를 감안하여 신호 현시별 시스템 구축방안을 제시하였다.