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Activity of Young Astronomers Meeting in 2020 Season

  • Lee, Gain;Paek, Insu;Kang, Jisu;Kim, Yigon;Lee, Yong-Hee;Im, Hyobin;Jeong, Miji;Choi, Bo-Eun;Choi, Woorak
    • The Bulletin of The Korean Astronomical Society
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    • v.45 no.1
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    • pp.56.2-57
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    • 2020
  • 2019년 10월, 젊은 천문학자 모임(Young Astronomers Meeting, 이하 YAM)은 가을 정기총회를 가졌으며, 2020년 임원진으로 회장 서울대학교 이가인, 부회장 서울대학교 백인수 회원이 선출되었다. 운영위원으로는 서울대학교 강지수, 경북대학교 김이곤, 경희대학교 이용희, UST 임효빈, 충남대학교 정미지, 세종대학교 최보은, 연세대학교 최우락 회원이 임명되었다. 매년 진행되어 오던 YAM 워크샵이 지난 2월 27일에 1박 2일동안 한국천문연구원에서 개최될 예정이었으나, 코로나19 사태로 인해 무기한 연기되었고 이밖의 많은 활동들에도 제약이 따랐다. 현재 YAM은 본 모임의 온라인 소식지인 <하늘사랑> 제 9호 발간 및 온라인 모임을 준비함으로써 직접 만나기 어려운 회원들의 소식을 공유하고자 한다. 본 포스터에서는 2020년 상반기 활동을 보고하고 하반기 활동 계획에 대해 논의하고자 한다.

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Comparison Analysis of Factor of Safety on Rock Slope in Boeun Region Using Distinct Element Method and Limit Equilibrium Method (개별요소법과 한계평형법을 이용한 보은지역 암반사면 안전율 비교해석)

  • 이지수;유광호;박혁진;민경덕
    • Journal of the Korean Geotechnical Society
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    • v.19 no.4
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    • pp.33-41
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    • 2003
  • The large planar failure has occurred in a rock cut slope of highway construction site in Boeun. This area is considered to be unstable since the discontinuity, whose orientation is similar to the orientation of the failure plane, is observed in many areas. Therefore, several analysis techniques such as SMR, stereographic analysis, limit equilibrium, numerical analysis, which are commonly used in rock slope stability analysis, are adopted in this area. In order to analyze the stress redistribution and nonlinear displacement caused by cut, which are not able to be obtained in limit equilibrium method, DEM and shear strength reduction technique were used in this study. Then the factors of safety evaluated by shear strength reduction technique and limit equilibrium were compared. In addition, the factor of safety under fully saturated slope condition was calculated and subsequently, the effect of the reinforcement was evaluated.

Analysis of the Factors Involved in the Occurrence of Rice Stripe virus in Chungcheongbukdo in 2008 and 2009 (2008-2009년 충북지역 벼 줄무늬잎마름병 발생 요인 분석)

  • Kang, Hyo-Jung;Ahn, Ki-Su;Han, Chong-U;Jeong, Kyeong-Heon;Park, See-Jung;Ji, Jae-Jun;Kim, Jeong-Soo
    • Research in Plant Disease
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    • v.16 no.2
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    • pp.109-114
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    • 2010
  • The occurrence factors of Rice stripe virus (RSV) in Chungcheongbukdo were analyzed by investigating the viruliferous insect rate (VIR) of overwintered small brown plant hopper (SBPH), the population density of SBPH, the infection rate of natural host plants, and the occurrence rate of RSV on rice paddy fields at the 3 areas of Cheongwon, Jincheon, and Boeun in 2008 and 2009. The average VIR of overwintered SBPH was 0.0% in 2008 and 1.1% in 2009. From SBPH collected on early June in 2009, VIR was higher as 1.4% at Jincheon and 4.2% at Boeun than those of overwintered SBPH, and this higher VIR might relate stronlgy with the adult population of SBPH immigrated from China. The populations of SBPH at Cheongwon, Jincheon and Boeun in 2008 were 3.8, 7.5 and 20.8 Head/$m^2$, respectively. However, those of Cheongwon and Jincheon increased up to about two folds as 8.4 and 13.1 in 2009. No RSV was detected on the natural host plants including barley. The factors involved in RSV occurrence were affected negatively by the low VIR of overwintered SBPH, the low population of overwintered SBPH, the low infection rate of RSV on the natural host plants, and the clean cultivation environment in Chungcheongbukdo.

Seasonal Distribution of Ticks in Boeun, Chungbuk during 2016-2020 (충북 보은지역의 참진드기류 분포조사 (2016-2020))

  • Lee, Geon Hui;Jeon, Jong Chan;Kim, Hyun Kyung;Kim, Gil-Hah
    • Korean journal of applied entomology
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    • v.60 no.3
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    • pp.323-329
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    • 2021
  • This study investigated the seasonal distribution of ticks in Boeun, Chungbuk, South Korea, from 2016 to 2020. Over the five-year period, ticks were collected annually from four different sites. A total of 17,704 ticks belonging to three tick species (Haemaphysalis longicornis, Haemaphysalis flava, and Ixodes nipponensis) were collected. H. longicornis was the dominant species across all four sites with the highest density of 68.40% of the total collected specimens, followed by H. flava (3.53%) and I. nipponensis (0.06%). The larvae of unidentified species were also collected: 11.81 T.I. (28.01%). The H. longicornis population peaked during the spring season (May-June), whereas the larval population peaked during August and September. H. longicornis was collected the most from four sites (coniferous forest, broad-leaf forest, mountain path, and copse), with the exception of the larvae, which was collected the most in grassland and grave. H. flava was collected from all sites, but in a small proportion. The SFTS virus was not found in any of the 828 pools of ticks during 2016-2020. Based on the results of this study, the continuous surveillance of the tick population is recommended to mitigate the spread of diseases by these vectors.

울산동강병원

  • Jeon, Yang-Geun
    • Journal of the Korean hospital association
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    • v.35 no.3 s.301
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    • pp.55-66
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    • 2006
  • 지금은 울산시내 한복판을 흐르는 태화강의 수질이 개선되어 생태공원이 조성되고 20여종의 철새도 날아든다. 마침 울산을 공업도시로 만든 최대의 정유업체 SK가 100만평에 이르는 대공원을 조성해 시민들에게 보은의 기부를 했다는 소식이 전해졌다. 과거 황량했던 울산에 더 없는 선물이다. 태화강이 바로앞에 흐르고 강을 따라 십리 대나무숲 공원이 이어지는 전망 좋은 곳에 위치한 울산동강병원!

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