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최근 개발된 cone beam computed tomography의 흡수선량 및 유효선량 평가
이종녕,한원정,김은경 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.2
Purpose : Cone beam computed tomography (CBCT) provides a lower dose and cost alternative to conventional CT, promising to revolutionize the practice of oral and maxillofacial radiology. The purpose of this study was to evaluate the absorbed and effective doses of Implagraphy and VCT (Vatech Co., Hwasung, Korea) and compare them with those of panoramic radiography. Materials and Methods : Thermoluminescent dosimeter (TLD) chips were placed at 27 sites throughout the layers of Female ART Head and Neck Phantom for dosimetry. Implagraphy, VCT units, and Planmeca Proline XC panoramic unit were used for radiation exposures. Radiation weighted doses and effective doses were measured and calculated using 1990 and 2005 ICRP tissue weighting factors. Results : Effective doses in Sv (ICRP 2005, ICRP 1990) were 90.19, 61.62 for Implagraphy at maxillay molar area, 123.20, 90.02 for Implagraphy at mandibular molar area, 183.55, 139.26 for VCT and 40.92, 27.16 for panoramic radiography. Conclusion : Effective doses for VCT and Implagraphy were only about 2.2 to 4.5 times greater than those for panoramic radiography. VCT and Implagraphy, CBCT machines recently developed in Korea, showed moderately low effective doses.
황미녕(Mi-Nyeong Hwang),조민희(Min-Hee cho),황명권(Myung-Gwon Hwang),정도헌(Do-Heon Jeong),성원경(Won-Kyoung Sung) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.1C
용어는 기술(technology)을 직 · 간접적으로 표현하고, 기술의 발전 동향에 따라 용어의 사용 패턴 또한 변한다. 즉, 시계열을 포함하는 대용량 문서 집합의 분석을 통해 기술 용어의 생성, 성장, 쇠퇴, 소멸 등의 활용주기 파악이 가능하다. 본 논문은 기술용어의 활용주기 모델 정의를 위한 초기 연구로, 정의 가능한 모델의 종류를 파악하고, 이에 대한 타당성 분석에 집중하도록 한다.
( Chang-nam Son ),( Tae-han Lee ),( Ji-hye Bang ),( Hye-jin Jeong ),( Jin-nyeong Chae ),( Won-mok Lee ),( Ji-min Kim ),( Sang-hyon Kim ) 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.4
Background/Aims: Anti-C-reactive protein (CRP) antibody has been introduced as a potential biologic marker in Systemic lupus erythematosus (SLE). The aim of study is to evaluate the level of anti-CRP antibody in patients with SLE. Methods: This study investigated the relationship between levels of anti-CRP antibodies and disease activity markers, such as complement, anti-double-stranded DNA antibody, and SLE disease activity index in 34 patients with SLE. Results: The serum anti-CRP antibody levels of the patients with SLE were significantly higher than those of the healthy controls (11.3 ± 5.6 μg/mL vs. 9.1 ± 2.8 μg/mL). The percentages of the positive anti-CRP antibody were 52.9% in SLE and 27.8% in controls. Disease duration of SLE showed significant correlation with the anti-CRP antibody (r = 0.234, p = 0.026). However no significant relationship was observed between the levels of anti-CRP antibodies and disease activity markers. Conclusions: These data show that the anti-CRP antibody levels of the patients with SLE were significantly higher than those of healthy controls. We observed that the presence of the anti-CRP anti-CRP antibody was not associated with disease activity of SLE.
Cheon, Sun-Ha,Lee, Yu-Na,Kang, Sung-Il,Kye, Soo-Jeong,Lee, Eun-Kyoung,Heo, Gyeong-Beom,Lee, Myoung-Heon,Kim, Jeong-Won,Lee, Kwang-Nyeong,Son, Han-Mo,Lee, Youn-Jeong Elsevier 2018 INFECTION GENETICS AND EVOLUTION Vol.66 No.-
<P><B>Abstract</B></P> <P>Avian influenza viruses (AIVs) are genetically separated by geographical barriers, resulting in the independent evolution of North American and Eurasian lineages. In the present study, to determine whether AIVs possessing the North American-origin nonstructural (NS) gene were previously introduced into South Korea, we performed a genetic analysis of AIVs isolated from fecal samples of migratory birds. We detected seven viruses possessing the North American-origin NS allele B among 413 AIV-positive samples obtained during AI surveillance between 2012 and 2017. We found evidence for the intercontinental transmission of at least three genetically distinct clusters of the B allele of the North American-origin NS gene into Eurasia at a low frequency. The host species of three viruses were identified as the greater white-fronted goose (<I>Anser albifrons</I>) using a DNA barcoding technique. Moreover, we used GPS-CDMA-based telemetry to determine the migration route of the greater white-fronted goose between the Far East of Russia and South Korea and found that this species may play an important role as an intermediate vector in the intercontinental transmission of AIVs. To improve our understanding of the role of wild birds in the ecology of AIVs, advanced AIV surveillance is required in the Far East of Russia as well as in Alaska region of Beringia accompanied by host identification and wild bird tracking.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Seven AIVs carrying North American-origin NS allele B were identified in Korea. </LI> <LI> Three genetically distinct clusters of NS allele B were detected. </LI> <LI> Greater white-fronted goose was implicated in the intercontinental transfer of AIV. </LI> </UL> </P>
최지녕,최연주,정수민,정애라,김민빈,김지은,김석환,김예원,이직,임희진,민경욱,나고운,남지우,박일흥,서정은,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Ji Eun,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wo 한국천문학회 2012 天文學會報 Vol.37 No.2
UFFO Burst Alert & Trigger telescope (UBAT) is one of major instruments of UFFO-Pathfinder. The UBAT aims at 10 arcmin resolution localization of Gamma Ray Bursts with X-ray coded mask technique. It has $400mm{\times}400mm$ coded mask aperture, hopper, shielding and detector module with effective area of $191cm^2$. The detector module consists of an assembly of 36 64-ch MAPMTs and $25mm{\times}25mm$ pixellated YSO crystal array, and associated analog and digital electronics of about 2500 channels. We performed a vibration test using a dummy MAPMT with the detector module structure to measure the indused stress applied onto the MAPMT. We designed a sub-structure on the detector module to avoid the resonance that would otherwise deforms the detector module structure. A finite element analysis confirms the reduction of the load acceleration down to 12g. The experimental results are to be reported. Consequently, it proves that the MAPMT arrays of the flight UBAT detector module structure would survive in the space launch environment.
The Burst Alert and Trigger Telescope for the Ultra Fast Flash Observatory Pathfinder
나고운,최지녕,최연주,정수민,정애라,김지은,김민빈,김석환,김예원,이직,임희진,민경욱,박일흥,서정은,Na, Go Woon,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Ji Eun,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, 한국천문학회 2012 天文學會報 Vol.37 No.2
The Ultra Fast Flash Observatory (UFFO) pathfinder is a payload system on-board the Russian satellite Lomonosov, scheduled to be launched in 2013. The main purpose of the UFFO pathfinder is to observe the early photons from Gamma-Ray Bursts. It consists of two instruments. The first instrument is the UFFO Burst Alert X-ray Trigger telescope (UBAT) for the fast-trigger and detection of GRB location, and the second is the Slewing Mirror Telescope (SMT) for the observation of the UV/optical afterglow from the GRB located by the UBAT. It will provide the first-ever systematic study of UV/optical emission far earlier than 1 sec after trigger. We will present the design, fabrication and the preliminary performance of the UBAT.
The Electronics system of the Ultra Fast Flash Observatory Pathfinder
김지은,최지녕,최연주,정수민,정애라,김민빈,김석환,김예원,이직,임희진,민경욱,나고운,박일흥,서정은,Kim, Ji Eun,Choi, Ji Nyeong,Choi, Yeon Ju,Jeong, Soomin,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Lee, Jik,Lim, Heuijin,Min, Kyung Wook,N 한국천문학회 2012 天文學會報 Vol.37 No.2
The Ultra Fast Flash Observatory (UFFO) pathfinder consists of the UFFO Burst Alert X-ray Trigger telescope (UBAT) and the Slewing Mirror Telescope (SMT). They are controlled by the UFFO Data Acquisition system (UDAQ). The UBAT triggers Gamma-Ray Bursts(GRBs) and sends the position information to the SMT. The SMT slews the motorized mirror rapidly to the GRB position to take the UV/Optical data within a second after trigger. The UDAQ controls each instrument, communicates with the satellite, collects the data from UBAT and SMT, and transfers them to the satellite. Each instrument uses its own field programmable gates arrays (FPGA) for low power consumption and fast processing, and all functions are implemented in FPGAs without using microprocessors. The entire electronics system of the UFFO pathfinder including architecture, control, and data flow will be presented.
The Slewing Mirror Telescope of the Ultra Fast Flash Observatory Pathfinder
정수민,최지녕,정애라,김민빈,김석환,김예원,김지은,이직,임희진,나고운,남지우,박일흥,서정은,Jeong, Soomin,Choi, Ji Nyeong,Jung, Aera,Kim, Min Bin,Kim, Sug-Whan,Kim, Ye Won,Kim, Jieun,Lee, Jik,Lim, Heuijin,Na, Go Woon,Nam, Jiwoo,Park, Il Hung 한국천문학회 2012 天文學會報 Vol.37 No.2
The Slewing Mirror Telescope (SMT) is a key telescope of Ultra-Fast Flash Observatory (UFFO) space project to explore the first sub-minute or sub-seconds early photons from the Gamma Ray Bursts (GRBs) afterglows. The first realization of UFFO is the 20kg UFFO-Pathfinder (UFFO-P) to be launched on board the Russian Lomonosov satellite in 2013 by the Soyuz-2 rocket. Once the UFFO Burst Alert & Trigger Telescope (UBAT) detects the GRBs, Slewing mirror (SM) will rotate to bring the GRB into the SMT's field of view instead of slewing the entire spacecraft. SMT can image the UV/Optical counterpart with about 4-arcsec accuracy. However it will provide a important understanding of the GRB mechanism by measuring the sub-minute optical photons from GRBs. SMT can respond to the trigger over $35^{\circ}{\times}35^{\circ}$ wide field of view within 1 sec by using Slewing Mirror Stage (SMS). SMT has 10-cm Ritchey-Chretien telescope and $256{\times}256$ pixilated Intensified Charge-Coupled Device (ICCD) on focal plane. In this paper, we discuss the overall design of UFFO-P SMT instrument and payloads development status.
이용운,김일렬,최창원,이강녕,이영수,곽정진,김희철,Lee, Yong-Un,Kim, Il-Ryeol,Choe, Chang-Won,Lee, Gang-Nyeong,Lee, Yeong-Su,Gwak, Jeong-Jin,Kim, Hui-Cheol 대한한의학방제학회 2001 大韓韓醫學方劑學會誌 Vol.9 No.1
From ancient times to Ching Dynasty, we studied the causes and oriental prescriptions of purpura for 23 oriental medical records. The results were obtained as follows ; 1. Purpura is a disease that raises the purplish speckle or speckle mass on the skin by blood overflowing between flesh and skin and belongs to speckle occurrence(Balban, 發斑) or blood symptom(Hyeoljeong, 血證). 2. At ancient times, purpura named Balban(發斑), Banjin(斑疹), Yin-yang dok(陰陽毒), Podoyeok(葡萄疫) and Bansa etc. 3. In oriental carse of purpura, Insufficient symptoms are gastric energy insufficiency and groundless frame, and Sufficient symptoms are heat-evil in stomach, blood heat, season's improper energy, yin-evil height and wind-heat with phlegm. 4. At oriental prescriptions on purpura, Insufficient symptom used Hwabantang(化斑湯) mostly, the next Hyunsam-seugmatang(玄蔘升麻湯), Jojungtang(調中湯), Seogakcheongdaeeum(犀角靑黛飮), Heuknowhan(黑奴丸) and Sufficient symptom used Jojungikgitang(調中益氣湯), Wibitang(胃脾湯), Daegeonjungtang(大建中湯), Hwanggi-geonjungtang etc. much. 5. The medicines for external use for purpura were Mil(蜜), Seungma(升麻t), Mangcho-jeodamjeup(芒硝猪膽汁), Geongal(乾葛), Seontae(蟬退), Chongbaek and Gangjeup(薑汁) etc., pregnant woman used jeongjeoni(井底泥). 6. The order of medicines were Seungma(升麻), Hwanggi, Insam(人蔘), Seokgo(石膏), Seogak(犀角), Hyunsam(玄蔘) and Chija(梔子) ect.