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소형수도재배구중(小型水稻栽培區中) Carbofuran 의 흡수(吸收) 이행(移行) 및 잔류특성(殘留特性)
이영득,박형만,박영선,박창규,Lee, Young-Deuk,Park, Hyung-Man,Park, Young-Sun,Park, Chang-Kyu 한국환경농학회 1987 한국환경농학회지 Vol.6 No.1
수도재배환경중(水稻栽培環境中) carbofuran의 흡수(吸收), 이행(移行) 및 잔류양상(殘留樣相)을 구명(究明)하기 위하여 소형수도재배구(小型水稻栽培區)를 이용(利用), carbofuran 입제(粒劑)를 2수준(水準)으로 살포(撒布)하고 시기별(時期別)로 수질(水質), 수도체(水稻體),토양(土壤) 및 수확물중(收穫物中) 잔류수준(殘留水準)을 조사(調査)한 결과(結果)는 다음과 같다. 수면살포(水面撒布)한 carbofuran 입제(粒劑)는 빠른 속도(速度)로 용출(溶出)되어 수질중(水質中) carbofuran 농도(濃度)는 처리(處理) 1일이내(日以內)에 최고치(最高値)에도 달하였다. 용출(溶出)된 carbofuran은 수도체(水稻體)로 흡수(吸收), 이행(移行)되어 처리(處理) 1∼3일(日) 후(後)에 최고치(最高値)에 도달하였으며 그 이후(以後) 완만한 감소(減少) 경향(傾向)을 보였다. 수질중(水質中) carbofuran의 반감기(半減期)는 4일(日)이었고 토양중(土壤中)에서의 반감기(半減期)는 처리수준(處理水準)에 따라 8∼12일(日)이었다. 수확물중(收穫物中) carbofuran 잔류량(殘留量)은 현미(玄米)의 경우 0.01∼0.02ppm이었으며 볏짚에서는 0.37∼0.07ppm의 범위(範圍)였다. A study has been conducted to investigate the behavior of carbofuran in a miniature paddy agrosystem simulated for paddy field. Carbofuran applied onto the paddy water was rapidly absorbed and translocated into rice plants. Carbofuran concentration in rice plant reached its maximum level between 1 to 3 days after treatment and gradually decreased thereafter. Half life of carbofuran concentration in paddy water was 4 days in both application rates of 0.12 and 0.24Kg a.i./10a. Carbofuran residue in paddy soil was gradually dissipated with the half life of 8 and 12 days in 0.12 and 0.24㎏ a.i./l0a respectively. Range of carbofuran residue in brown rice and rice straw harvested from the paddy agrosystem was 0.01∼0.02 ppm and 0.37∼0.57 ppm irrespective of the two application rates respectively.
CCD 분광 관측에 의한 활동홍염의 도플러 시선속도분포 연구
박영득,윤홍식,문용재,PARK YOUNG DEUK,YUN HONG SIK,MOON YONG-JAE 한국천문학회 1998 天文學論叢 Vol.13 No.1
To study kinematics of solar prominences, we have made Ha spectrographic study of an eruptive prominence which appeared on the 27th of August, 1992 with a position angle of 270 deg. The observation was carried out by a Littrow type spectrograph and a G1 CCD camera attached to the 25cm coronagraph at Norikura Coronal Station. In taking the spectral data the slit was placed in parallel to the solar limb at 7 different heights, each being separated by 5 arcsec with a time step of 30 sec. The observed eruptive prominence shows a wide range of line of sight Doppler velocity, spanning from $V_{dopp}=-17.5km/s\;to\;V_{dopp}=58.2km/s$. It is also found that the velocity increases with height at the rate of ${\Delta}V= 0.86 km/s/arcsec$.
박영득 ( Young-deuk Park ) 한국외국어대학교 글로벌정치연구소 2019 글로벌정치연구 Vol.12 No.2
본 논문은 정치인 유튜브 채널을 분석함으로써 정치의 사인화 수준을 살펴보는 것을 목적으로 한다. 본 논문은 정치인이 정당조직을 통하지 않고도 사적인 소통의 수단을 활용하여 다수 유권자들과 상호작용할 수 있게 된 현재의 정치 커뮤니케이션 환경이 정치의 사인화를 야기하고 있다고 주장한다. 20대 국회의원과 정당의 유튜브 채널 모두를 소셜미디어 분석 프로그램인 Webometric을 활용해 분석했다. 분석결과는 자신이 속해있는 정당보다 유튜브에서 더 강력한 영향력을 가지고 있는 정치인들이 모든 정당에 존재하며, 평균적으로 민주당을 제외한 모든 정당에서 정당보다 개별 정치인이 더 강한 영향력을 가지는 정치의 사인화 현상이 나타난다는 것을 보여준다. This paper aims to examine level of the personalization of politics by analyzing the Korean political YouTube channels. This paper argues that the current political communication environment, in which politicians have become able to interact with a majority of voters by using the means of private communication without having to go through party organization, is causing the personalization of politics. Both YouTube channels of the members of the 20th National Assembly and major political parties used Webometric, a social media analysis program, to analyze them. The analysis shows that politicians with more influence on YouTube than the party they belong to exist in all parties, and that on average, individual politicians have stronger influence than their parties, except the Democratic Party.
박영득,윤홍식,문용재,PARK YOUNG DEUK,YUN HONG SIK,MOON YONG-JAE 한국천문학회 1998 天文學論叢 Vol.13 No.1
A quantitative analysis has been made to estimate the horizontal variation of physical parameters in a loop type active prominence by analyzing Call H&K and $H_{\varepsilon}{\ldots}$ spectra taken from such an active prominence (appeared on May 23, 1981 with position angle 251 degree) with Littrow type spectrograph attached to 25cm coronagraph at Norikura Coronal Station of National Astronomical Observatory of Japan. The spectral resolution is 1.12A/mm and the spatial resolution is 25'/mm for Call H&K lines. The present study shows that the turbulent velocity ranges from 10km/s to 20 km/s in the loop prominence, which are in good agreement with those of Hirayama (1989). It is also found that the temperature of the loop prominence is higher than that of quiescent prominences$(\~8,000 K)$ by about 4,000 K, whose temperature deviation seems very high.