• Title/Summary/Keyword: 선유도

Search Result 1,440, Processing Time 0.068 seconds

Regional Stem Curve and Volume Function Model of Pinus densiflora in Kangwon-Province (강원도 지방 소나무의 지역(地域) 간곡선(幹曲線) 및 재적식(材積式) 모델)

  • Kim, Joon Soon;Lee, Woo Kyun;Byun, Woo Hyuk
    • Journal of Korean Society of Forest Science
    • /
    • v.83 no.4
    • /
    • pp.521-530
    • /
    • 1994
  • Voume functions, which are usually expressed by the function of dbh and height, are estimated commonly through the regression analysis with the highest statistical accuracy considered. In Korea, general volume functions for each tree species were prepared by means of the regression analysis with the exponential function ($V=aD^bH^c$) having the dbh(D) and height(H) as independent variables. In this study, regional stem curve functions for the Pinus densiflora in Kangwon-province were derived and a regional volume function model, in which the stem volume can be directly estimated through the rotational integral of the regional stem curve functions, was prepared. The regional volume estimated by the prepared model was more accurate than the volume by the general volume table for the Pinus densiflora in Kangwon-province. Additionary, the form of stem curves derived by the regional stem curve functions showed difference from each other. The stem in Youngwol and Wonju taper down more fast in upper part than that in other regions. These various stem forms also led to the regional difference in volume estimates.

  • PDF

Effects of Clematis mandshurica Rupr. on Nitric Oxide Synthase in the Periaqueductal Gray of Collagenase-induced Rat Osteoarthritis Model (위령선 약침이 콜라겐으로 유도된 골관절염 모델에서 흰쥐의 PAG 영역에서 NOS 발현에 미치는 영향)

  • Yang, Kook-Jung;Kim, Soon-Joong;Seo, Il-Bok;Park, Se-Keun;Kim, Jeong-Seon;Seo, Jung-Chul;Choi, Sun-Mi;Lee, Hye-Jung;Kim, Ee-Hwa
    • Korean Journal of Acupuncture
    • /
    • v.22 no.4
    • /
    • pp.109-116
    • /
    • 2005
  • 목적 : 골관절염은 진통을 수반하는 퇴행성 관절질환이며, 장애를 일으키는 주요한 원인이 된다. 또한 노인들에 있어서 골관절염은 매우 흔한 질환이라 할 수 있다. Nitric oxide(NO)는 Nitric Oxide Synthase(NOS)에 의하여 칼슘의존성통로를 통하여 L-arginine 으로부터 합성되어지며, NO는 중추신경계에 있어서 중요한 세포사이의 전달자이다. 방법 :본 연구에서는 위령선 으로부터 추출한 액이 콜라겐으로 유도된 관절염에 걸린 쥐의 dorsolateral periaqueductal gray(DL-PAG) 영역에서 nNOS(neuronal NOS)와 NOS에 대하여 미치는 영향 을 nNOS immunohistochemistry와 nicotinamide adenine dinucleotide phosphate-diaphorase(NADPH-d) 검사법을 통하여 조사하였다. 결과 : 골관절염이 유발된 흰쥐의 DL-PAG 영역에서 nNOS와 NOS의 발현억제가 관찰되었으며, 위령선이 콜라겐으로 유도된 골관절염에서 감소된 nNOS와 NOS의 발현이 증가되었다. 결론 : 본 연구를 통하여 위령선은 골관절염이 유발된 흰쥐의 DL-PAG에서의 nNOS와 NOS의 발현에 영향을 미친다는 결과를 얻을 수 있었다.

  • PDF

Ichthyofauna at the Intertidal Zone in Seonyu-do Island, Gogunsan Islands, West Sea of Korea (서해 고군산군도 선유도의 조간대 어류상)

  • Yu Sin Shin;Jae-Goo Kim
    • Korean Journal of Ichthyology
    • /
    • v.36 no.2
    • /
    • pp.164-173
    • /
    • 2024
  • We collected fish from the intertidal zone of Seonyu-do Island in order to find out the composition of fish species by using hand net and kick net from March to October 2022. During the investigation period, a total of 2,707 individuals from 9 Orders, 19 Families, 45 Species were collected, and the dominant species was identified as Nuchequula nuchalis and the subdominant species was Favonigobius gymnauchen. By family group, the largest number of fishes in the Gobiidae were 13 species, followed by the Scorpaenidae and the Stichaeidae were 4 species. In this study, genus Clariger was discovered for the first time off the West sea, and it is estimated that fish living on the southern coast are moving northward due to an increase in the water temperature of the West Sea and detailed research is needed.

Coupling unit for high frequency PLC and factors influencing signal attenuation (고주파 전력선통신을 위한 신호결합장치와 신호손실에 영향을 주는 인자)

  • Byun, Woo-Bong;Kim, Hyun-Sik;Gwak, Kwi-Yil;Ju, Sung-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2006.07c
    • /
    • pp.1333-1334
    • /
    • 2006
  • 중, 저압 배전 시스템을 통신망으로 사용하는 전력선 통신(PLC, Power Line Communication)에서 신호결합은 하드웨어 측면에서 매우 중요하다. 본 논문에서는 2-40MHz의 통신 신호를 수백 A의 전류가 흐르는 배전선으로 보내고 추출하는 유도성 신호결합장치와 통신신호 손실에 대하여 조사하였다.

  • PDF