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Monitoring of gamma-ray bright AGN BLLAC and OJ287 with KVN 21m radio telescopes
한명희,이상성,변도영,양지혜,백준현,손봉원,Han, Myoung-Hee,Lee, Sang-Sung,Byun, Do-Young,Yang, Jee-Hye,Baek, Jun-Hyun,Sohn, Bong-Won 한국천문학회 2012 天文學會報 Vol.37 No.2
MOGABA is a project monitoring of gamma-ray bright AGN(Active Galactic Nuclei). Since May 2011, we have observed total flux, degree of linear polarization, and polarization angle of about twenty AGN once a week at 22, 43 and 86GHz using KVN(Korean VLBI Network) 21m radio telescopes. We have observed variation of total flux of BLLAC and OJ287 from May 2011 to March 2012. We have observed flares of total flux at 22GHz for those sources from October 2011 to November 2011. In this paper we report the variation of total flux, degree of linear polarization and polarization angle at 22, 43, 86GHz for BLLAC and OJ287.
한명희(Myeong Hee Han),강영승(Young Seung Kang),현상권(Sang Kwon Hyun) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
The vertical current profiles were measured by ADCP near Jukbyun area. The observed current data analyzed 2 meter depth cell size. The current velocity patterns showed a similar tendency in each depth. The spring tidal range in Jukbyun is 10.4㎝. So, the residual current is stronger than tidal current.
백준현,이상성,변도영,양지혜,한명희,손봉원,Baek, Jun-Hyun,Lee, Sang-Sung,Byun, Do-Young,Yang, Jee-Hye,Han, Myoung-Hee,Sohn, Bong-Won 한국천문학회 2012 天文學會報 Vol.37 No.2
AGN(Active Galactic Nucleus) consists of a supermassive black hole located at its center, an accretion disk around the black hole, and bipolar jets. Since May 2011, we have performed the MOGABA(Monitoring Of GAmma-ray Bright AGN) project for observing gamma-ray bright AGN once a week at multifrequencies using KVN(Korean VLBI Network) 21m radio telescopes. The MOGABA project is the observations for measuring the degree of polarization, polarization angle, and total flux of about 20 AGN at 22, 43 and 86GHz. By this project, we are able to investigate polarization characteristics, spectral index, and variation of rotation measure at radio wavelengths of gamma-ray bright AGN and to study possible relation between gamma-ray flares and magnetic field structure change in AGN. According to previous research, gamma-ray flares of some AGN are coincident with large changes in angle of linear polarization. In this paper we report the preliminary results of linear polarization and total flux at 22, 43, 86GHz of gamma-ray bright quasars 3C279 and 1510-089 showing noticeable variation of total flux at 22GHz in late 2011, and discuss possible correlation with gamma ray light curves.
신용운(Yong Woon shin),정원재(Won Jae Chung),김진희(Jin Hee Kim),한명희(Myung Hee Han),김영범(Young Bum Kim),김기수(Chi Su Kim),김치열(Chi Youl Kim),김경국(Kyung Gook Kim),주영채(Young Chae Joo) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.3
Polyarteritis nodosa, one of the necrotizing vasculitis involving predominantly small and medium sized arteries is rare disease.Polyarteritis nodosa may afiect many organs such as kidney, heart, liver,gastrointestinal tract and muscle, so that non-specific symptorns ate characteristic and diagnosis is very difficult. Gastrointestinal Ivoivement was reported in about 50% of cases, but bleeding complication is rere and results in poor prognosis.Recently we experionced a case of plolyarteritis nodosa complicating massive upper gastrointestinal bleeding, which was diagnosed by pathologic wxamination of stomach apecimen surgically removed.