• Title/Summary/Keyword: 지천

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모든 병의 타깃, 만성질환 - 이제 기관지천식으로 고생하지 말자!

  • Choe, Byeong-Hwi
    • 건강소식
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    • v.34 no.5
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    • pp.16-17
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    • 2010

  • 살랑살랑 불어오는 바람마저 아름다운 이 봄이 불쾌한 이들이 있다. 바로 알레르기 질환을 앓고 있는 환자들이다. 가장 흔한 알레르기 질환에는 꽃가루병, 즉 알레르기 비염이 있으며, 이보다 흔하지는 않지만 증상이 심해 알레르기 비염보다 주목받는 기관지천식도 있다. 대표적인 만성질환 중 하나인 기관지천식에 대해서 알아본다.

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Bar Development in Gravel-bed River (자갈하상하천의 bar지형 발달에 관한 연구 -골지천을 사례로-)

  • Yang, Hee-Kyung
    • Journal of the Korean Geographical Society
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    • v.32 no.4
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    • pp.435-444
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    • 1997

  • Bars in a river bed show the flow of the river, the shape of a river bar can be easily measured in any river. The purpose of this study is to research the morphological characteristics of river bars. The case study area is the lower Golgi River, six bars were examined. All six bars are gravel bars with a grain size in excess of 2 millimeters. Four of the bars are longitudinal bars, in which the direction of the bar follows the river current. After analyzing the gravel in the bars, it was determined that as the gravel flows down the river, gravel grain size decreases while grain roundness increases. The shape of bar varies locally according to flow regime, channel slope, and w/d ratio.

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Distribution Status and Estimation of Population Size of the Endangered Species, $Cobitis$ $choii$ (Pisces: Cobitidae) in Guem River, Korea (멸종위기어류 미호종개 $Cobitis$ $choii$ (Pisces: Cobitidae)의 분포양상 및 서식개체수 추정)

  • Ko, Myeong-Hun;Lee, Ill-Ro;Bang, In-Chul
    • Korean Journal of Ichthyology
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    • v.24 no.1
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    • pp.56-61
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    • 2012

  • The distribution status and population size of the endangered species, $Cobitis$ $choii$, were investigated in the Guem River, Korea. From 1984~2004, this species occurred at 20 survey stations; however, their numbers have but rapidly decreased in recent years (2006~2011), during which time they were only observed at six stations. The area of their habitat is narrow and occurs in primarily downstream, sandy zones. Using the mark-recapture method, populations were estimated at 9,106 and 34,717 individuals for the main habitats of Baekgok and Ji Stream, respectively.

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