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정세명 ( Se Myong Jeong ),진승현 ( Seung Hyun Jin ),김민희 ( Min Hee Kim ),백경수 ( Kyung Soo Baek ),김종영 ( Chong Young Kim ),안영상 ( Young Sang Ahn ),안기완 ( Ki Wan An ) 한국환경생태학회 2013 한국환경생태학회지 Vol.27 No.1
본 연구에서는 비자림의 생태적 특성을 파악하고 건강진단을 통해 나주 불회사 비자림 산림유전자원보호구역의 관리방안을 도출하였다. A유형은 현 수준을 유지하면서 경쟁목이나 피해목이 발생할 경우에 이를 제거하거나 치료하는 소극적인 관리, B유형은 토양의 산성화를 개선하고 조릿대, 왕대와 굴참나무, 개서어나무 등의 낙엽활엽수들을 제거하여 비자림을 확대 육성하는 적극적인 관리, C유형은 편백림 안에서 토양의 산성화 개선과 기존 비자림 중심의 소극적 관리, D유형은 토양산성화 개선과 비자 치수를 보호 육성하기 위하여 경쟁관계에 있는 식생을 제거하는 적극적 관리를 도출하였다. 마지막으로 해당 산림유전자원보호구역은 IUCN 보호지역관리 카테고리에 따라 카테고리 Ⅲ(자연기념물) 또는 Ⅳ(종서식지 보호구역)로 등록 관리되어야 함을 제안하였다. This study investigated some of the specific ecological characteristics Torreya nucifera forest and its health conditions so that was drawn from four different management strategies, such as Types A, B, C, and D, for protected areas of forest genetic resources. Type A refers to passive management which routinely keeps the current status of forests by removing competitive trees or curing damaged ones. Type B, as active one which improves Torreya nucifera forest, includes increase of soil pH and removal of Sasa borealis, Phyllostachys bambusoides , and deciduous broad-leaved trees such as Quercus variabilis, Carpinus tschonoskii et al.. Type C is another passive one which reduces soil acidity within Chamae cyparisobtusa forest and maintains the existing forests. Type D is another active one which decreases soil acidity and simultaneously reduces problems associated with competitive and invasive plants to nurture the young trees. At last, it is important to note that the protected areas for forest genetic resources need to be entitled to categories Ⅲ(natural monument) or Ⅳ (habitat/species management area) in accordance with protected area management guidelines of IUCN.
장경수 ( Kyoung Soo Jang ),이계한 ( Kye Han Lee ),안기완 ( Ki Wan An ),백경수 ( Kyoung Soo Baek ),오찬진 ( Chan Jin Oh ),유한춘 ( Han Chun Yu ),김종영 ( Jong Yeong Kim ) 한국도서학회 2014 韓國島嶼硏究 Vol.26 No.3
This study was conducted to investigate the temporal variation of vascular flora in Songido island. The vascular plants were surveyed in 1989 and from 2010 to 2011, respectively. The summarized surveyed results were 337 taxa, 87 families, 227 genus, 291 species, 2 subspecies, 37 varieties and 7 forms. Compared to 1989, the results contain more than 215 taxa, 68 families, 157 genus, 179 species, 1 subspecies, 30 varieties and 5 forms. The number of floristic regional indicator plants was 58 taxa. 1 taxa was level Ⅴ, 11 taxa level Ⅲ and 46 taxa level Ⅰ. Endermic plants of Korea such as the Forsythia koreana, Populus tomentiglandulosa, and Paulownia coreana were surveyed. Rare plants such as the Prunus yedoensis and Chionanthus retusus were surveyed as well. Also, naturalized plants were recorded as 23 taxa, 10 families, 19 genus, 23 species. The Naturalization Index was 6.82% and the Urbanization Index 7.6%. In short, this study shows the distribution of vegetation in various climate zones (temperate and warm temperate zone) of Songido. It was conducted to provide primary data that could contribute to the conservation and restoration of flora and vegetation. In addition the study also shows that it is necessary to control non-native species and to protect native ones.
배합비에 따른 교면 포장용 콘크리트의 피로 특성에 관한 연구
김두환,백경수 서울産業大學校 2005 논문집 Vol.54 No.2
The bridge-decks surfacing is the object to secure trafficability and to protect bridge face from impact load of traffic volume and other external conditions. But the deformation of pavements and cracks happen due to the damage of the bridge-decks surfacing from the increase of the traffic, short maintenance period and continuous vibration of bridge. It is necessary to various materials of the bridge-decks surfacing and design of durability and environmental influence because of the various format of bridge design. This test is to make the 3-type high performance concrete that has different mixing ratio and is added the blast furnace slag, fly ash and silica respectively, and to compare 3-type high performance concrete of normal high strength concrete of 400kgf/cm² strength through the static loading test and fatigue test. And test specimen is united floor slab and pavement for the durability of bridge. As a result of this study, it is acquired that high performance concrete has more high ultimate load and lower strain and crack width than normal high strength concrete about 40% in the static loading test, and high performance concrete has more lower deflection and crack than normal high strength concrete in over one million recycled loading in fatigue test. It is concluded that mixing ratio has influence on sufficient load carrying capacity resistance of crack.