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RISS 인기검색어
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- 저자 : 이인철(Lee In Cheol) (검색결과 152 건)
- 무료
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이인철,이순희 ( In Cheol Lee,Sun Hi LEE ) 생화학분자생물학회 1985 BMB Reports Vol.18 No.4
Treatment of L-methionine sulfoximine (MSO), a specific irrevesible inhibitor of glutamine synthetase, caused about 60% inhibition of photorespiration in pea (Pisum sativum L.) leaf discs at a concentration of 2 mM. MSO also inhibited photosynthetic COz fixation, but inhibition rate was only about 4096 of control. There was increased incorporatation of ^(14)C into organic acids from CO₂ with MSO and decreased into amino acids and neutral fraction. Expecially, MSO increased the incorporation of ^(14)C into glyoxylate. However, ^(14)C of glycolate was lower level than that of control. These results showed that NH₃ released from photorespiration seemed to be reassimilated into glutamine by glutamine synthetase, and inhibition of photorespiration by MSO was chiefly caused by depression of photorespiratory nitrogen cycle.
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이인철,이덕주,Lee, In-Cheol,Lee, Duck-Joo The Acoustical Society of Korea 2006 韓國音響學會誌 Vol.25 No.e1
The screech tone of underexpanded jet is numerically calculated without any specific modeling for the screech tone itself. Fourth-order optimized compact scheme and fourth-order Runge-Kutta method are used to solve the 2D axisymmetric Euler equation. Adaptive nonlinear artificial dissipation model and generalized characteristic boundary condition are also used. The screech tone, generated by a closed loop between instability waves and quasi-periodic shock cells at the near field, is reasonably analyzed with present numerical methods for the underexpanded jet having Mach number 1.13. First of all, the centerline mean pressure distribution is calculated and compared with experimental and other numerical results. The instantaneous density contour plot shows Mach waves due to mixing layer convecting supersonically, which propagate downstream. The pressure signal and its Fourier transform at upstream and downstream shows the directivity pattern of screech tone very clearly. Most of all, we can simulate the axisymmetric mode change of screech tone very precisely with present method. It can be concluded that the basic phenomenon of screech tone including the frequency can be calculated by using high-order and high-resolution schemes without any specific numerical modeling for screech tone feedback loop.
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이인철,경우민,공철원,홍창선,김천곤,Lee, In-Cheol,Gyeong, U-Min,Gong, Cheol-Won,Hong, Chang-Seon,Kim, Cheon-Gon 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.10
The buckling and postbuckling behaviors were sutdied analytically and experimentally for stiffened laminated composite panels under compression loading. The panels with I-, blade, -and hat-shapeed stiffeners were investigated. In the analysis, the stiffened panels were anlyzed using the nonlinear finite element method combined with an improved arc-length method. The progressive failure analysis was done by adopting the maximum stress criterion and complete unloading failure model. The effects of the fiber angles were investigated on the buckling and postbuckling behaviors. In the experiment, the web and the lower cap of each stiffener were formed by the continuous lay-up of the skin for cocuring the stiffened panels. Therefore, the separation between stiffener and skin was not found in the junction part even after postbuckling ultimate load and the stiffened panels had excellent postbuckling load carrying capacity. A shadow moire thchnique was used to monitor the out-of-plane deformations of the panels. The piezoelectric films were attached to the panels to get the failure characteristics of the panel. The analytical results on the buckling load, postbuckling ultimate load, and failure pattern showed good agreement with the experimental results.
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부영양화된 뢰호내해의 수질관리를 위한 수ㆍ저질예측모델의 적용
이인철,장선덕,김종규,Lee In Cheol,Chang Sun-duck,Kim Jong Kyu,Ukita Masao 한국해양환경·에너지학회 1998 한국해양환경·에너지학회지 Vol.1 No.2
대표적인 부영양화 해역인 일본의 뢰호내해를 대상으로 하여 해수ㆍ저질문의 욕존 산소와 영양염의 수수과정을 표현할 수ㆍ저질예측모델을 개발하여, 해역의 유입부하량과 수질의 응답특성, 부하량삭감의 영향해석 및 유입부하량과 수산자원의 관계 해석을 통하여 부영양화 해역의 수질관리방안에 대하여 연구하였다. 부하에 대응한 수질의 장기예측결과, 부하량과 수질의 응답특성이 해역에 따라 다르게 나타난다. 적상부하량의 간역추산방법으로서 인접해역의 부하영향 및 기여율을 포함한 부하삭감후의 수질예측에 대한 개산식을 제안하였다. 부하량 삭감효과의 수직계산결과 인(P) 뿐만 아니라 질소(N)의 부하삭감의 영향이 크게 기여함을 보였다. 유입부하량과 수산자원의 관계를 수질을 매개로 검토한 바, 뢰호내해와 같은 부영양화 해역에서는 유입부하량의 증가는 1차생산량의 증가에 반영되지만 2차생산 이후의 전송효율에도 한도가 있는 것으로 나타났다. The management of water quality and fishery resources with a major environmental problem in eutrophic coastal sea is studied. The numerical experiments using the water-sediment quality model (WSQM) were carried out for the management of water quality at the Seto Inland Sea in Japan. The results of long-term water quality simulation showed responses of seawater quality to input loads to vary in different localities. A formula roughly forecasting water qualify to estimate the effect of loading abatement was proposed. The simulation for the improvement of seawater quality showed the abatements of nutrient loads such as total phosphorus (TP) and total nitrogen (TN) as well as organic loads such as chemical oxygen demand (COD) to be peformed in the eastern Seto Inland Sea from Bisan Seto to Osaka Bay. On the other hand, it is indicated that the increase of loading leads to the increase of primary production. while not straightly to the increase of fish production for the catch of fisheries.
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굴 패각 피복 콘크리트 기질의 해조류 착생에 관한 연구
이인철,박성식,우희은,정일원,최창근,김경회,Lee, In-Cheol,Park, Seongsik,Woo, Hee-Eun,Jeong, Ilwon,Choi, Chang Geun,Kim, Kyunghoi 해양환경안전학회 2021 해양환경안전학회지 Vol.27 No.5
바다숲 복원과 함께 굴 패각의 새로운 자원화를 위해 굴 패각을 피복시킨 콘크리트 기질을 부산광역시 기장군 일광면 동백리 연안에 설치하여 약 1년간(2020년 1월~11월) 해조류 피도 변화를 모니터링하였다. 1월 모니터링 결과, 대조구인 일반 콘크리트 기질에는 해조류가 출현하지 않았다. 이에 반해 굴 패각을 10 ~ 90 % 피복시킨 실험구에는 해조류가 약 10 ~ 80 %의 피도로 착생한 것을 확인하였다. 또한, 11월 실험구의 피도는 대조구 대비 최대 49 % 높게 나타났다. 이상의 결과로부터 콘크리트 기질의 인공어초에 굴 패각 피복을 통해 인공어초의 해조류 착생을 촉진할 수 있으며, 수산 부산물인 굴 패각의 새로운 자원화 방안을 제시하였다. In this study, we located concrete substratum covered by oyster shells in the coastal area of Gijang-gun, Busan, South Korea, and monitored changes in coverage of macroalgae for approximately a year from January 2020 to determine the potential for sea forest restoration and resourceization of the oyster shells. At the start of monitoring, we observed that macroalgae coverage of the oyster-shell-covered concrete substratum (treatment) was 10 - 80 %, whereas no macroalgae were attached to the normal concrete substratum (control). By November, macroalgae coverage of the treatment had increased by 49 % compared to that of the control. We concluded that covering oyster shell on a sea forest reef can promote macroalgae establishment and the possibility of sea forest restoration by the resourceization of oyster shells.
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이인철,Lee, In-Cheol 한국데이터베이스진흥원 2003 디지털콘텐츠 Vol.9 No.-
전자책이란 도서로 간행됐거나 간행될 수 있는 저작물의 내용이 디지털 데이터를 이용해 전자 기록매체, 저장장치에 수록된 뒤, 유무선 정보통신망을 통해 컴퓨터나 휴대단말기로 그 내용을 읽고, 보고, 들을 수 있도록 한 디지털 도서를 총칭한다. 이렇게 볼때 로버트 기요사키가 만든 '부자 아빠, 가난한 아빠'를 한글 문서나 워드로 만들어 개인 PDA에서 읽는 것도 전자책의 형태일 수 있으며, 한국전자북이 판매하는 하이북 단말기에서 'YBM 시사영어사'의 토익을 보고 MP3로 들을 수 있어도 전자책이다. 이렇듯 큰 의미로는 저작물이 도서로 발간됐거나 가능성이 있는 저작물을 디지털 데이터로 변환된 모든 것을 전자책이라 할 수 있지만 본 지면에서는 국, 내외 상업화된 유로 전자책 사이트에서 제공되는 전자책에 활용되는 솔루션만을 대상으로 한다.
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