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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.
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.
155mm 포탄 및 C-4 90kg 기폭에 의한 야전구축 방호자재 및 구조체용 신방호자재의 방호성능 평가
이인철,김홍섭,남정수,김석봉,홍원희,김규용,Lee, In-Cheol,Kim, Hong-Seop,Nam, Jeong-Soo,Kim, Suk-Bong,Hong, Won-Hee,Kim, Gyu-Yong 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.4
In this study, it was evaluated the protective performance of the protection material for filed of the army by impact of fragment from the explosion of 155mm artillery shell to propose the improvement items. And it was evaluated the protection materials for structural boby such as corrugated steel plate, concrete block, prevention paint of explosion, aluminum foam and concrete T-wall by impact of fragment of 155mm artillery shells and explosion-induced pressure of C-4 explosive. As a result, protective performance of the existing protective material was superior but reinforcement is necessary for secondary damage because sand is leaking. The protective performance of new protective materials was greater than existing protective materials. And it can be used for protective materials.
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.
이인철(I.C. LEE),김경회(K.H. KIM),류청로(C.R. RYU),김윤태(Y.T. KIM) 한국해양환경·에너지학회 2005 한국해양환경·에너지학회 학술대회논문집 Vol.2005 No.11
In order to decide the optimum site for restoration/creation technique of coastal ecological environmental zone, hydraulic environment, topographical change, behaviors of pollutants were analyzed. Backside of Jinudo which is a tranquil area was selected as optimum site for restoration/creation technique of coastal ecological environmental system.
3형제에서 발현된 Caroli병을 동반한 선천성 간 섬유화증 3예
이인철 ( In Chul Lee ),이영상 ( Young Sang Lee ),김명환 ( Myung Hwan Kim ),유은실 ( Eun Sil Yu ),민영일 ( Young Il Min ),류진숙 ( Jin Sook Ryu ),김해련 ( Hae Ryun Kim ),정영화 ( Young Hwa Joung ) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.2
We have experienced 3 cases of congenital hepatic fibrosis with Caroli's disease in 3 siblings, whose clinical manifestations were diverse such as repeated cholangitis or variceal hemorrhage. They also had multiple renal cysts, so we suppose that the clinical entities of these patients are in the spectrum of fibropolycystic disease of liver and kidney.
제주도 자생 식물 혼합추출물의 in vitro 생리활성 평가
이인철 ( In-chul Lee ),박병권 ( Byoung-kwon Park ),김정미 ( Jeong-mi Kim ),문지영 ( Ji-young Moon ),김대용 ( Dae-yong Kim ) 대한미용학회(구 대한미용과학회) 2018 대한미용학회지 Vol.14 No.1
In this study moisturizing and anti-wrinkle effects of water extract from Jeju island plant mixture such as Portulaca oleracea, Opuntia ficusindica var. saboten, aloe vera, Ecklonia cava were investigated in vitro. Hyaluronic acid (HA) is a highly hydrophilic molecule known to be associated with skin moisture, wrinkle formation. Also, many studies have reported that collagen and elastin are a major factor in skin wrinkle formation. Therefore, we performed MTT assay, HA synthesis, hyaluronic acid synthase-2 (HAS-2) gene expression, collagen synthesis, hyaluronidase, collagenase and elastase inhibition assay for evaluation of biological activities. ELISA assay revealed that mixture increased HA and collagen production and RT-PCR also showed that mixture increased mRNA level of HAS-2 gene in HaCaT cells. And other results showed prevention of hyaluronidase, collagenase and elastase activation. These results indicate Jeju island plants mixture have moisturizing and anti-wrinkle effects. Therefore, Jeju island plants mixture can be used as a functional cosmetic.
이인철(I.C. LEE),김경희(K.H. KIM),류청로(C.R. RYU),김윤태(Y.T. KIM) 한국해양환경·에너지학회 2004 한국해양환경·에너지학회 학술대회논문집 Vol.2004 No.-
This study investigated about inflow behavior & quantitative rating of sediments to make a management plan in Nakdong river Estuary using in-situ collector experiment of suspended particle matter and resuspended bed load, grain size analysis and tidal current observation. The grain-size analysis of surface sediments using Unified Solid Classification System (USCS) shows that SC is distributed mainly in the north of the sand bar and SP in the south. In terms of spatial distribution, the sedimentation rate has a large value in St.1 and St.4 and bed flux has maximum value in St.4 and minimum value in St.3. The range of the sedimentation rate and bed load flux is 0.0004~0.427 g/㎠/day and 0.085~1.7579 g/㎠/day, respectively.