• Title/Summary/Keyword: 인간 간섭

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Effects of Human Trampling Disturbance on the Vegetation at the Subalpine Zone near the Peak of Mt. Sorak, Korea (답압이 설악산 아고산대의 식생에 미치는 영향)

  • 이규송;최오길;김석철
    • The Korean Journal of Ecology
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    • v.25 no.5
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    • pp.321-328
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    • 2002
  • In order to provide the basic information for restoration of vegetation, conservation of rare species and maintenance of biodiversity, changes of site factors and vegetation by human trampling disturbance were investigated at the subalpine zone near the peak of Mt. Sorak in Korea. The destructed vegetation was found mainly in the southern parts with gentle slope in this study area. Height and coverage of vegetation and the species diversity decreased, and the community structure depended on trampling strength. Soil moisture, organic matter contents and litter thickness in the site with destructed vegetation by human trampling showed lower values than in the undisturbed site. Soil depth decreased, and gravel exposure on the ground surface increased by soil erosion responded to trampling strength.

Structure of Forest Communities in Chiak Mountain National Park - Case Study of Guryong Temple - Birobong Area - (치악산 국립공원의 삼림군집 구조 -구룡사-비로봉지역을 중심으로-)

  • 박인협;이경재;조재창
    • Korean Journal of Environment and Ecology
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    • v.2 no.1
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    • pp.1-8
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    • 1988
  • To investigate the forest structure of Guryongsa-Birobong area in Mt. Chiak, four districts were selected and forty-five plots were set up at the districts. The leading dominant species of District I, the valley forest in which users' density was very high. was Pinus densiflora. That of District II, the valley forest in which users' density was high. and Districs III, the valley forest in which entering was restricted recently. was Comus controversa. That of District III, the ridge forest in which users' density high, was Quercus mongolica. Species diversities of District I, II, III, and IV were 1.3252, 1.3736, 14421, and 1.2546, respectively. DCA ordination were showed that successional trends of tree species seem to be from Pinus densiflora through Quercus spp. to Carpinus laxtflora in ridge and midslope forest and from Pinus densiflora through Quercus spp. to Comtus controversa and Carpinus cordata.

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Rapid Ecoassessment Technique about Anthropogenic Disturbance Potentiality of Land Use (토지의 훼손 잠재성에 대한 신속한 생태평가기법)

  • 김종원
    • The Korean Journal of Ecology
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    • v.26 no.1
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    • pp.19-22
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    • 2003
  • In order to determine the degree of anthropogenic disturbance potentiality (ADP) of the area a rapid ecoassessment technique was developed on the basis of actual vegetation map. ADP degree of relevant unit cell was computed by using four criteria of land use patterns such as forested area, open water and stream, agricultural area, and urbanized area. Ultimate ADP degree of each cell was obtained by means of direct and indirect computation process. Finally the map of ADP was drawn and analyzed. Vulnerable cell and disturbance nuclei were determined according to disturbance vector which is a kind of potential disturbance pressure of relevant cell influenced by surrounding cell. A case study was accomplished in the Gijang area of Pusan metropolitan city. 973 meshes (500m×500m) were analyzed and a total of 79 meshes were currently threatened. Present technique of rapid ecoassessment was practically useful for diagnosing and planning land use.

Teleoperation of a Robot Manipulator using Bioimpedance (생체 임피던스를 이용한 로봇의 원격제어)

  • 김근영;김경환;김덕원;김수찬
    • Proceedings of the IEEK Conference
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    • 2001.06e
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    • pp.13-16
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    • 2001
  • 본 논문에서는 인간의 생체 임피던스를 이용하여 인간의 팔 운동을 추정하고자 한다. 생체 신호를 이용하여 인간의 운동을 추정하기 위해서는 먼저 생체 신호와 인간의 운동 사이의 정량적인 관계를 구해야 하며 특히, 다자유도 운동의 추정에는 생체 신호간의 간섭등을 고려하여야 한다. 본 논문에서는 먼저 일자유도 운동실험을 통해 생체 임피던스와 인간 팔 관절의 회전각 사이의 선형성을 고찰한다. 그리고, 다자유도 측정시에 발생하는 근육간의 결합성과 방향성의 문제에 대해 주파수 분할 측정법을 도입하여 팔의 다자유도 운동을 추정하였다. 마지막으로, 실제의 로봇을 제어하는데 응용하였다.

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섬진강 순창-곡성 구간에서의 하상지형 변화원인 고찰

  • 김진관;김종욱;양동윤;김주용;남욱현
    • Proceedings of the KSEEG Conference
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    • 2003.04a
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    • pp.273-275
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    • 2003
  • 지난 수 백년 또는 수 천년 동안 많은 곳에서 인간의 활동에 의한 영향으로 하천과 계곡의 형태가 많은 영향을 받았다(Hickin, 1983; Gregory, 1987). 인간이 일으킨 간섭은 자연 상태에서의 과정과 경향을 가속화하거나 변화시킴으로써 하천변화에 영향을 미치고, 그 결과 하천적응의 시간을 단축하게 한다. 섬진강 순창-곡성구간은 만은 곳에서 인간의 활동에 의한 영향을 받은 곳이다. (중략)

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3-D OCT Image Reconstruction for Precision Analysis of Rat Eye and Human Molar (쥐 눈과 인간 치아의 정밀한 단층정보 분석을 위한 OCT 3-D 영상 재구성)

  • Jeon, Ji-Hye;Na, Ji-Hoon;Yang, Yoon-Gi;Lee, Byeong-Ha;Lee, Chang-Su
    • The KIPS Transactions:PartB
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    • v.14B no.6
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    • pp.423-430
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    • 2007
  • Optical coherence tomography(OCT) is a high resolution imaging system which can image the cross section of microscopic organs in a living tissue with about $1{\mu}m$ resolution. In this paper, we implement OCT system and acquire 2-D images of rat eye and human molar samples especially in the field of opthalmology and dentistry. In terms of 2-D images, we reconstruct 3-D OCT images which give us another inner structural information of target objects. OPEN-GL reduces the 3-D processing time 10 times less than MATLAB.