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      • KCI등재후보

        담수유입에 의한 식물플랑크톤의 대량번식 후의 연안 수질변동 특성

        이영식,박영태,김귀영,최용규,이필용,Lee Young-Sik,Park Young-Tae,Kim Kui-Young,Choi Yong-Kyu,Lee Pil-Yong 해양환경안전학회 2006 海洋環境安全學會誌 Vol.12 No.2

        연안해역의 수질특성 및 일차생산 증가 메커니즘을 이해하는 데에 기초 자료로 활용하기 위하여, 많은 양의 담수 유입 후 규조류가 대량 번식한 상태와 담수가 유입되지 않고 적조가 발생하지 않은 상태의 해수의 수질특성을 조사차였으며 그 결과를 요약하면 아래와 같다. 1) 호우로 많은 양의 담수가 유입된 해역에서 규조류인 Skeletonema costatum와 Thalassiosira spp.가 각각 $1,200{\sim}5,000cells/mL,\;750{\sim}1,200cells/mL$의 농도로 관찰되었다. 2) 규조류가 대량으로 증식하지 않은 곳보다 규조류가 대량으로 증식한 곳에서 수온, PH, 용존산소농도가 높게 조사되어, 두 곳 사이의 거리가 20m 정도에 불과함에도 불구하고 두 곳의 수질특성 차이는 뚜렷하게 나타났다. 3) 규조류가 대량으로 증식하지 않은 곳보다 규조류가 대량으로 증식한 곳에서 질소 인, 규소의 농도가 낮게 조사되어, 호우로 질소, 인, 규소보다는 규조류가 증식하기 위해 필요한 미량원소가 육지로부터 풍부하게 유입된 것으로 보인다. DIN/DIP, $DIN/SiO_2-Si$ 비는 모두 규조류가 대량 증식한 정점과 그렇지 않은 정점간의 뚜렷한 차이는 없었다. In order to study the characteristics of water quality in coastal water and mechanism of phytoplankton blooms, factors of water quality were investigated in diatom bloom area due to rainfall event and no diatom bloom area Diatom blooms occurred after heavy rain and the dominant species were Skeletonema costatum($1,200{\sim}5,000cells/mL$) and Thalassiosira spp.($750{\sim}1,200cells/mL$). In diatom bloom area, water temperature, pH, and dissolved oxygen were observed at higher level than in no diatom bloom area Although these two areas were only 20 meters apart from each other, sharp difference in coastal water quality between two areas was observed. In diatom bloom area, concentrations of nitrogen, phosphorus, and silicate were observed at lower level than in no diatom blooms area. This seems to be due to inflow of much trace metal such as Fe, Mo, Se and so on than nitrogen, phosphorus, and silicate by rainfall events. However, distinct differences in DIN/DIP and $DIN/SiO_2-Si$ between these two areas were not observed.

      • KCI등재
      • KCI등재후보

        Exploring Inhibition Factors of Communicative Learning Practices in Korean University EFL Classes

        이영식,백성주 한국영어교과교육학회 2011 영어교과교육 Vol.10 No.2

        The purpose of this study is to examine the causes of inhibitions regarding students’ willingness to communicate (WTC) in a certain English program and instruction of a university in central South Korea. This study focuses on cultural as well as educational issues and learners’ perception in English as a Foreign Language (EFL) classes in a university. In an effort to explore the importance of investment for those selected students’ English improvement, the major focus of this research was how the participants take part in their university English program. A qualitative design method was employed to investigate the participants’ intent. Data was collected through face-to-face interviews or by e-mails. The results of the study indicate that the participants’ attitude towards the current grammar and reading comprehension-based curriculum in EFL in Korea had a negative influence on students’ English acquisition and willingness to communicate in English in the classes. Therefore, developing a course that may promote learners’ communicative skills for active participation is suggested.

      • KCI등재

        심한 자해로 입원한 아동의 행동치료

        이영식,홍강의 대한신경정신의학회 1989 신경정신의학 Vol.28 No.1

        The authors report behavior therapy in a 5 year old midly retarded boy with severe selfinjurious behaviors, consisting of head banging, chin knocking, nail biting, ear traction and face clapping. Routine laboratory tests including nerve conduction velocity test, chromosomal study, thyroid function test, V.D.R.L., E.E.G. and urine ferric chloride test were carried out to rule out organic causes. No positive finding was noted in the above tests. Intelligence test showed mild mental retardation IQ and social maturation score was 2 years below for his chronologic age. The main reason and functions of the patient’ s self injurious behaviors was attenition getting from the adults, particularly his mother, who is immature, non nurturing and lacking basic child rearing skills. As for the management of self injurious behaviors, extinction and differential reinforcement methods including inattention, warning for time out and restraint, time out and physical restraint were utilized in a hierachical order according to patient,s response. Whenever self-injurious behavior stopped, positive reinforcement was given a few minutes later each time. In addition to behavioral method, play therapy and parental education for parenting skill were carried out to improve the mother-child relationship. The results were judged to be successful by the end of one month admission period. On discharge self injurious behavior was nearly extinct. And temper tantrum was easily controlled by firm verbal warning. Also the patient showed mardked improvement in peer relationship and was able to engage in age appropriate play and express his emotion appropriately.

      • KCI등재

        The status quo of secondary English education in the new millenium

        이영식 한국영어교과교육학회 2012 영어교과교육 Vol.11 No.1

        English language education in Korea has experienced vast changes in the last decade, towards more effective and globalized language teaching. To examine the changes of secondary English education in Korea over the last decade,this study reviews several reforms made to English language education at secondary schools. More specifically, the important innovations made in an effort to globalize Korean students are addressed. Among the innovations in the secondary English education were the revision of the 7th National Curriculum of English, the employment of native English speaking teachers (EPIK), and the reinforcement of teaching English in English (TEE). This study also looks at the English teacher employment exam for secondary schools and what kinds of changes have been made to date. Moreover, it discusses the recent effort to develop the National English Ability Test (NEAT). In short, this study aims to provide a bird’s eye view of the Korean secondary English education by discussing the major reforms made to English language education at secondary schools over the last decade.

      • KCI등재

        추계 광양만의 유기물 기원과 분포 특성

        이영식,강창근,최용규,이상용,Lee, Young-Sik,Kang, Chang-Keun,Choi, Yong-Kyu,Lee, Sang-Yong 한국해양학회 2007 바다 Vol.12 No.1

        유기물 증가에 미치는 환경인자를 중심으로 그 수평분포 특성, 원인, 주요오염원의 영향권에 대하여 검토하기 위해 표층 해수와 표층 퇴적물을 조사하였으며, 그 결과를 요약하면 다음과 같다. 유기물변동에 영향을 미치는 환경인자에 대한 주요 오염원은 크게 섬진강과 동천 등의 담수, 광양시 생활하수, 여수산업단지로 크게 나누어볼 수 있었다. 해수와 퇴적물의 환경인자에 대한 수평분포 특성과 해수의 흐름 등을 고려하여 이들 주요 오염원의 영향권을 구분한 결과, (I) 섬진강 담수의 영향을 많이 받는 해역, (II) 광양시와 동천의 영향이 큰 해역, (III) 여수 산업단지의 영향을 많이 받는 해역으로 나누어졌다. 그리고, 오염원의 영향권 별 수질환경인자의 특성으로는 섬진강 담수의 영향을 많이 받는 해역은 낮은 염분, 높은 농도의 $NO_3-N$과 $SiO_2-Si$, 담수와 생환하수의 영향이 큰 해역은 낮은 염분, 높은 농도의 $NO_3-N,\;NH_4-N,\;SiO_2-Si$, 여수 산업단지의 영향을 많이 받는 해역은 표층해수의 경우 높은 수온, 높은 농도의 $NH_4-N$과 $PO_4-P$, 퇴적물의 경우 높은 농도의 $NH_4-N,\;PO_4-P,\;SiO_2-Si$로 특징 지울 수 있을 것으로 보인다. Environment factors related to the distribution of organic matter in surface seawater and sediments were investigated to estimate main pollution sources and range of their influence in Gwangyang Bay. The main pollution sources for the factors that affect organic matter distribution could be divided into three main sources: fresh water runoffs from Seomjin and Dong River, Gwangyang-si domestic sewage, and Yosu Industrial Complex. Considering the characteristics in horizontal distributions of the environmental factors in water column, sediment, and water current regime, the influencing range of these main sources was likely to be divided into three areas within the bay as follows: Area I receiving lots of fresh water from Seomjin River, Area II receiving lots of domestic sewage from Gwangyang-si and fresh water of Dong River, Area III receiving lots of materials from Yosu Industrial Complex. Area I seems to be characterized as low salinity, high concentration of $NO_3-N,\;and\;SiO_2-Si$, Area II as low salinity, high concentration of $NO_3-N,\;NH_4-N,\;and\;SiO_2-Si$, and Area III as high water temperature, high concentration of $NH_4-N,\;and\;PO_4-P$ in water column, high concentration of $NH_4-N,\;PO_4-P,\;and\;SiO_2-Si$ in surface sediments.

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