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Relationship Between EUV Coronal Jets and Bright Points Observed by SDO/AIA
김일훈,이경선,이진이,문용재,성숙경,김갑성,Kim, Il-Hoon,Lee, Kyoung-Sun,Lee, Jin-Yi,Moon, Yong-Jae,Sung, Suk-Kyung,Kim, Kap-Sung 한국천문학회 2012 天文學會報 Vol.37 No.2
We have investigated the relationship between EUV coronal jets and bright points observed by Solar Dynamic Observatory (SDO)/Atmospheric Imaging Assembly (AIA). For this we consider 39 EUV coronal jets from May 2010 to July 2011 in 171 A identified by Heliophysics Events Knowledgebase (HEK) which provides an automatic identification of coronal jets. We look for coronal jet-bright point pairs as follows. First, we select the size of event area as 360 arcsec * 360 arcsec where the coronal jets are located at the center of the area. Second, we select jet-bright point pairs in case that they are located at the same position or just adjacent. Third, we select jet-bright point pairs that are connected by loops each other. Otherwise, we select jet-bright points pairs as the nearest one. As a result, we present 19 coronal jet-bright point pairs. The mean distance of these pairs is 77.24 arcsec. According to their distance and morphological connection, we classify the following three groups: 1) Adjacent (6 events), 2) Loop connected (5 events), and 3) Not connected in appearance (8 events). The histogram of mutual distance has two peaks; the first peak corresponds to the first group and the other one to the second group. We compare these events with previous observations and theoretical models as well as discuss possible physical connections between jets and bright points.
사면의 구역 및 절리의 연장성을 고려한 암반사면의 안정성 확률해석
장보안 ( Bo An Jang ),성숙경 ( Suk Kyung Sung ),장현식 ( Hyun Sic Jang ) 대한지질공학회 2010 지질공학 Vol.20 No.2
사면의 안정성 분석에 결정론적인 방법이 최근까지 많이 사용되어 왔으나, 암반의 불확실성과 가변성을 고려하는 확률론적인 방법이 더욱 효과적인 것으로 알려지면서 확률론적인 방법의 사용이 점차 증가하는 추세이다. 그러나 현재까지의 방법들은 절리의 특성이나 암반의 풍화 특성 등과 같은 암반의 특성이 사면 전체에서 균질한 것으로 가정하고 있으며, 암반 사면의 파괴에 가장 결정적인 변수인 절리의 연장성을 고려하지 않은 상태에서 안전율 혹은 파괴확률을 계산하여 사면의 안정성을 분석하고 있어서 정확한 사면 안정성 분석에 한계를 보이고 있는 실정이다. 이 연구에서는 모델 사면을 설정한 후, 사면이 균질하다고 가정한 경우와 사면을 암반 및 절리의 상태에 따라 구역으로 분할한 경우의 파괴확률을 계산하여 비교하였고, 또한 위의 각각의 경우에 절리의 연장성을 변수로 고려한 파괴확률을 계산하였다. 또한 강원도 홍천군에 위치한 사면을 구역으로 분할한 후 절리의 연장성을 고려한 파괴확률을 계산하여 모델 분석의 적용성을 검증하였다. In analysis of slope stability, deterministic analysis which yields a factor of safety has been used until recently. However, probability of failure is considered as a more efficient method because it deals with the uncertainty and variability of rock mass. In both methods, a factor of safety or a probability of failure is calculated for a slope although characteristics of rock mass, such as characteristics of joints, weathering degree of rock and so on, are not uniform throughout the slope. In this paper, we divided a model slope into several zones depending on conditions of rock mass and joints, and probabilities of failure in each zone are calculated and compared with that calculated in whole slope. The persistence of joint was also used as a parameter in calculation of probability of failure. A rock slope located in Hongcheon, Gangwondo was selected and the probability of failure using zoning and persistence as parameter was calculated to confirm the applicability of model analysis.
액상석회비료의 수관살포가 단감 과실의 무기성분, 품질 및 생리장해과에 미치는 영향
문병우,성숙경,장경호 중부대학교 자연과학연구소 2000 自然科學硏究論文集 Vol.9 No.1
This experiment was carried out to investigate the effects of foliar spray of liquid calcium fertilizer and CaCO3 during the growing season on mineral nutrients, fruit quality and physiological disorder of non-astringent persimmon. Calcium contents of leaf, fruit flesh and peel were increased by foliar spray of liquid calcium fertilizer manufactured from oyster shell, but CaCO3 foliar spray had no effect. In persimmon treated both chemicals, K contents of leaves were decreased and those of flesh were increased, but those of peel not changed. The contents of T-N, P, and Mg in all investigating parts were not affected with treatment. The fruit firmness of persimmons treated with liquid calcium fertilizer was higher than that of other fruits at harvest and after 56 days of storage at 25℃. The rates induced skin blackening and green spot fruits were decreased by foliar spray of liquid calcium fertilizer. The Ca contents in leaf and peel of persimmons induced green spot fruits were lower than those of normal persimmons, but the Mn contents were higher.
김규원,성숙경,최정두 영남대학교 자원문제연구소 1997 資源問題硏究 Vol.16 No.-
Karyotypes of 'Sun Ray'(L. Asiatic hybrid), 'Hagoromo'(L. leichtlinii X L. elegans) and their hybrid, and L. concolor, 'Enchantment'(L. Asiatic hybrid) and their hybrid were analyzed. Two interspecific hybrids in Lilium were newly obtained by embryo rescue culture. All species showed 2n= 24 in chromosome number and 12 pairs in homologous chromosome. But, chromo-some structures of all species were different each other. Hybrids of 'Sun Ray' X ‘Hagoromo' were longer in chromosome length, decreased in arm ratio, and medium in relative length. Secondary constriction of the hybrids were same as 'Hagoromo'. Hybrids of L. concolor X 'Enchantment' were shorter in chromosome length, decreased in arm ratio, and longer in relative length. Secondary constriction of the parent species was observed, nevertheless that of their F1 was not observed.