• 한국자원식물학회지
• /
• 제5권2호
• /
• pp.85-93
• /
• 1992

This experiment was Conducted ta screening for the anti-cancer efficacy from the wild plants which are naturally growing in the Korea. The results are as follows. The results were shown thatZea may L. nad significantly effects on mediculal efficacy anganist anti-tumor by usulg the totalpacked cell volume methods and also, severals plants, such as Sofonum nigrum, Patrinia hispidoBunge, Eragrostis, ferrugenia Beauv, Salaginela pouzolgiana Spring, Platrycarya strobilacea Bunge,Codonopsis lanceolata Benth. et Hook fil. which are collected from Giri and Mooju mountain in Koreaand Nagano in Japan were showed effects on auti-tumor. But the pharmaceologial activities ofPharbitis nil Choisy was believed to strong effec on anti - cancer tumors, while toxicity of its wasshown high that induced te kill all used mice. Extraction of Patrinia hispida Bunge, Pharbitis nilChoisy, Toilis japonica DC, Eragrostis erruginea Beauv. and Forsythia koreana Nakai showed effec-tively supressed on growth rate of cancer tumor by the below 50 percent of T/C ratio at 30mg /mlof extraction from plant. That Is strong activity while Reynouxria japonica Houtt. was observed onlymild activities. The above results many possibly suggest that Patrinia hispido Bunge and Eragrostisferrugina Beauv. inhibited the growth of cancer tumor by the both total packed cell volume methodand cytotoxicity method. Although basic research is still going on, we will find out an accurate moth-od for developing useful medicinal plant to improve pharmacological activites against anti-cancertumor, especialy, in Eragrostis ferruginea Beauv.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제15권4호
• /
• pp.1246-1262
• /
• 2021

Recent studies have demonstrated the strong ability of deep convolutional neural networks (CNNs) to significantly boost the performance in single image super-resolution (SISR). The key concern is how to efficiently recover and utilize diverse information frequencies across multiple network layers, which is crucial to satisfying super-resolution image reconstructions. Hence, previous work made great efforts to potently incorporate hierarchical frequencies through various sophisticated architectures. Nevertheless, economical SISR also requires a capable structure design to balance between restoration accuracy and computational complexity, which is still a challenge for existing techniques. In this paper, we tackle this problem by proposing a competent architecture called Enhanced U-Net Network (EUN), which can yield ready-to-use features in miscellaneous frequencies and combine them comprehensively. In particular, the proposed building block for EUN is enhanced from U-Net, which can extract abundant information via multiple skip concatenations. The network configuration allows the pipeline to propagate information from lower layers to higher ones. Meanwhile, the block itself is committed to growing quite deep in layers, which empowers different types of information to spring from a single block. Furthermore, due to its strong advantage in distilling effective information, promising results are guaranteed with comparatively fewer filters. Comprehensive experiments manifest our model can achieve favorable performance over that of state-of-the-art methods, especially in terms of computational efficiency.

• 분석과 대안
• /
• 제3권2호
• /
• pp.33-57
• /
• 2019

After the tragic incident of the sinking of Sewol in spring 2014, Korean migrants in Britain began to hold street protests in London. These protestors condemned the Korean government for the lack of appropriate responses to the accident, and for its failure to conduct proper investigation on the issue. The small group of protestors held silent street protests every month at Trafalgar Square, despite not gaining much media coverage nor public attention. These migrants' almost three-year long protest outside their homeland is puzzling. Not only did they live in Britain for a long time to the extent that they regard the country as their second home, but they also exert scant amount of influence on the political landscape in South Korea. What can then account for these individuals' participation in activism related to their homeland politics? In this paper, we utilize the concept of 'moral identity' to explain the behaviors of Korean migrants involved in the street protests. These migrants had strong 'moral identity', which triggered a sense of responsibility to act when their cherished moral values were jeopardized. Korean migrants who possessed a strong sense of moral identity placed huge importance on living in accordance with their moral values. It is a way of upholding their self-esteem and sustaining their ideal self.

• 한국해양학회지:바다
• /
• 제1권1호
• /
• pp.46-54
• /
• 1996

한반도 서해 태안반도 연근 해역에서 춘계동안 부유물 함량분포경향을 분석 하여, 부유물질의 운반 양상을 해석하였다. 특히 비파괴 방식의 SPECTREX 분석 기기를 이용하여 부유물의 입도분포를 정밀 분석하였다. 연구해역의 수괴 특성은 강한 조석전선이 형성되어, 수직적으로 균질한 수괴의 연안역과 수온약층이 뚜렷한 외양역으로 구분되었다. 부유물 함량은 대체로 10 mg/l 이하로 낮지만, 연안역의 저층수와 외양역의 중층수에서는 혼탁한 수괴가 관측되었다. 부유물은 평균입도가 각각 5-6$\mu\textrm{m}$와 8-10$\mu\textrm{m}$에 해당하는 세립질 부유물과 조립질 부유물로 구분되며, 주로 쇄설성 성분이 우세한 것으로 해석되었다. 전반적으로 태안반도 연근해역에서는 강 한 조류에 의해 해저 퇴적물의 재부유작용이 우세하며, 세립 퇴적물의 집적이 제한 되는 것으로 해석된다. 또한 경기만의 초입에 해당하는 북부역으로부터 공급되는 쇄설성 부유 퇴적물이 수온약층의 중층수역을 따라 남쪽 또는 남서쪽 방향으로 우 세하게 운반되는 것으로 해석된다.

• 대기
• /
• 제31권1호
• /
• pp.45-60
• /
• 2021

The synoptic structures and precipitation impact of extratropical cyclones (ETCs) influencing on the three adjacent megacities in East Asia, i.e., Beijing (Beijing ETCs), Seoul (Seoul ETCs) and Tokyo (Tokyo ETCs), are analyzed using ERA-interim reanalysis data from 1979 to 2018. Individual ETC tracks are identified with the automated tracking algorithm applied to 850-hPa relative vorticity field. Among four seasons, ETCs are the most frequent in spring. In this season, Beijing ETCs are mainly generated at the leeside of Altai-Sayan Mountains and primarily develop through interaction between the upper-level trough and lower-level cyclonic circulation. For Seoul ETCs, the leesides of Altai-Sayan Mountains (Seoul-N ETCs) and Tibetan Plateau (Seoul-S ETCs) are main genesis regions and the features of ETCs are different according to the genesis regions. While Seoul-N ETCs mainly develope by the same mechanism of Beijing ETCs, strong diabatic heating due to vapor transport is responsible for the genesis of Seoul-S ETCs. Tokyo ETCs are originated from the leesides of Tibetan Plateau and Kuroshio-Oyashio Extension regions, and strong diabatic heating as well as interaction between upper and lower levels determines the genesis of these ETCs. The precipitation impact resulting from ETCs become strong in the order of Beijing ETCs, Seoul-N ETCs, Seoul-S ETCs, and Tokyo ETCs and accounts for up to 40%, 27%, 52%, and 70% of regional precipitation, respectively.

• 한국해양학회지:바다
• /
• 제15권3호
• /
• pp.110-114
• /
• 2010

수영만에 설치된 모니터링 부이에서 관측된 해류, 바람, 파고자료와 부산항의 조석자료를 이용하여 강한 이안류가 발생했던 2009년 8월 13~15일의 물리환경을 분석하였다. 수영만의 조류는 단주기 해류성분과 비슷한 크기를 가지며 대조-소조에 따른 변화를 보인다. 이안류가 발생했을 때 북동풍이 강하게 불고 조류와 해류가 해운대 해안 쪽 방향으로 중첩되었다는 공통점이 있고, 8월 14일 오후에 이안류가 없었을 때는 파고와 조석은 유사한 조건이었지만 조류와 해류가 거의 반대방향이었다. 강한 바람은 큰 파랑을 동반하여 이안류 발생의 기본조건을 조성하지만 만 내의 해류에 미치는 국지적인 영향은 비교적 작다. 수영만에 인접한 세 해수욕장 중에서 해운대에서만 강한 이안류가 나타나는 데에는 해운대 중앙부의 특이하게 얕은 수중언덕이 외해에서 들어오는 파랑, 해류, 조류를 감쇠시키는 효과가 중요할 것으로 생각된다.

• 한국식품과학회지
• /
• 제46권1호
• /
• pp.13-18
• /
• 2014

우리나라의 대표적인 식용 봄꽃 중 개나리꽃, 진달래꽃, 벚꽃, 목련꽃(백목련, 자목련) 등의 80% 에탄올 추출물에 함유된 항산화 활성성분과 항산화활성을 측정한 결과는 다음과 같다. 5종의 봄꽃 시료의 건물 중량(g of dry weight)에 함유된 생리활성 성분중 총 페놀함량은 gallic acid 등량값으로 14.1-18.9 mg이며, 총 플라보노이드 함량은 catechin 등량값으로 0.3-4.9mg으로 나타났다. 또한 비타민 C의 함량은 0.71-1.31 mg이었으며, 총 카로티노이드 함량은 베타카로틴 등량값으로 $1.9-578.1{\mu}g$으로 나타났으며 프로안토시아니딘의 함량은 카테킨의 등량값으로 2.8-23.5 mg으로 측정되었다. DPPH와 ABTS 라디컬 소거능 및 FRAP 분석의 환원력에 의한 시료의 항산화활성은 건물시료 중량 당 trolox 등량값으로 1.2-46.1 mM로 나타났다(p<0.05). 이들 항산화활성에 상관도($r^2$)가 가장 높은 생리활성 성분은 비타민 C, 플라보노이드, 총 폴리페놀 함량의 순으로 나타나 이들 성분이 항산화활성의 주요인자로 확인되었다. 본 실험에 사용된 5종의 봄꽃 시료 중 항산화활성 성분이 다양하면서 동시에 항산화능이 가장 탁월한 시료는 벚꽃으로 나타났으며(p<0.05), 이들의 항산화활성은 시료 농도(1-1000 mg)에 비례하는 것으로(p<0.05) 나타나, 천연 항산화제 및 기능성 식이소재로서의 잠재적 활용 가능성이 가장 높은 꽃으로 평가되었다.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2006년도 추계학술발표대회 논문집
• /
• pp.448-451
• /
• 2006

Multi-residential housing in Korea has many problems basically because maintenance, management, and remodelling have been done without considering building elapse and residents' needs. Residential open building has been suggested as one of the solutions. Even though the techniques have been actively developed for residential open building in Japan and the Netherlands, some obstacles are still existing. Especially in Korea, due to the lack of studies for facilitating residential open building, the development and popularization of residential open building are delayed. With the concern that the facilitation of process and systems is as important as technical development, the evaluation of process and systems is needed for promoting residential open building. As result, strong investigation of current situation can offer basic foundation to facilitate residential open building. The purpose of this study is to propose plans to facilitate residential open building in Korea through a comparative study between Korean and Japanese system.

• 한국지진공학회:학술대회논문집
• /
• 한국지진공학회 2002년도 춘계 학술발표회 논문집
• /
• pp.451-458
• /
• 2002

To secure structures from strong earthquakes occurred recently and design economically seismic isolation design is spread rapidly. Specially, frictional isolator has superiority in application to bridge because it has many advantages. however, because isolator lies between pier and girder, responses of pier and superstructure contradict each other and we need to control the two responses to minimize the bridge's failure probability. In this study, frictional coefficient and horizontal stiffness is defined as design parameters of frictional isolator. the optimal design parameters of frictional isolator to minimize the bridge's failure probability are presented according to strength of earthquake and soil conditions. The result says that optimal friction coefficient is higher as the strength of earthquake is increased. And it is also higher as the soils are more flexible. But, optimal horizontal stiffness of rubber spring is insensitive to strength of earthquake and soil condition.

• 한국대기환경학회지
• /
• 제7권3호
• /
• pp.197-202
• /
• 1991

It is observed that the outbreak of dust storms (yellow sand) from Northern China and Mongolia occurs a few times in April 1988 and 1990. It is found that a dust storm initiated with strong gusty winds after the passage of a cold front, particularly after defrost of the ground surface of a source region in the early spring. According to meteorological chart, satellite images and trajectory analyses, dust clouds invaded Korea in April 1988 and 1990 were landing in the sink area after 2 $\sim$ 4 days travelling for 2,000 $\sim$ 3,000 km from a source region. It was also observed that in the west coast total suspended particulated (TSP) were 100 $\sim$ 200 $\mug m^{-3}$ and sulphates $(SO_4=)$ were 3 $\sim$ 10 $\mug m^{-3}$. These values clearly exceed the concentrations of a background level measured in the Arctic and Atlantic Ocean. Trajectory analyses and meteorological analyses suggest that the high values occurred with prevailing westerly flows coming from anthropogenic sources in China. High concentrations of air pollutants occurred in the backside of an anticyclone and in the area "col".col".uot;.