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백강현,이현경,이경현,김하영,박중원,이보람,허지웅,이명헌,배유찬,Baek, Kang-Hyun,Lee, Hyun-Kyoung,Lee, Kyung-Hyun,Kim, Ha-Young,Park, Jung-Won,Lee, Bo-Ram,Her, Ji-Woong,Lee, Myoung-Heon,Bae, You-Chan 대한수의학회 2014 大韓獸醫學會誌 Vol.54 No.4
A calf suffering from diarrhea was admitted to the Animal and Plant Quarantine Agency for diagnostic evaluation. Postmortem examination revealed that the mesenteric lymph node was enlarged and small intestine wall was thin. Microscopically, a large number of small round organisms were attached to the small intestine villi. Villous atrophy and proprial neutrophil infiltration were also observed. Based on modified Ziehl-Neelsen staining, electron microscopy, and ELISA results, the calf was diagnosed with fatal cryptosporidiosis.
정지궤도 위성 대류권 오존 관측 자료를 이용한 대류권 이동벡터 산출 가능성 연구
신대근,김소명,박주선,백강현,홍성재,김재환,Shin, Daegeun,Kim, Somyoung,Bak, Juseon,Baek, Kanghyun,Hong, Sungjae,Kim, Jaehwan 대한원격탐사학회 2022 大韓遠隔探査學會誌 Vol.38 No.6
The tropospheric ozone is a pollutant that causes a great deal of damage to humans and ecosystems worldwide. In the event that ozone moves downwind from its source, a localized problem becomes a regional and global problem. To enhance ozone monitoring efficiency, geostationary satellites with continuous diurnal observations have been developed. The objective of this study is to derive the Tropospheric Ozone Movement Vector (TOMV) by employing continuous observations of tropospheric ozone from geostationary satellites for the first time in the world. In the absence of Geostationary Environmental Monitoring Satellite (GEMS) tropospheric ozone observation data, the GEOS-Chem model calculated values were used as synthetic data. Comparing TOMV with GEOS-Chem, the TOMV algorithm overestimated wind speed, but it correctly calculated wind direction represented by pollution movement. The ozone influx can also be calculated using the calculated ozone movement speed and direction multiplied by the observed ozone concentration. As an alternative to a backward trajectory method, this approach will provide better forecasting and analysis by monitoring tropospheric ozone inflow characteristics on a continuous basis. However, if the boundary of the ozone distribution is unclear, motion detection may not be accurate. In spite of this, the TOMV method may prove useful for monitoring and forecasting pollution based on geostationary environmental satellites in the future.
EOF와 SVD을 이용한 아프리카 지역에서관측된 OMI HCHO 자료의 검증
김재환 ( J H Kim ),백강현 ( K H Baek ),김소명 ( S M Kim ) 대한원격탐사학회 2014 大韓遠隔探査學會誌 Vol.30 No.4
본 연구는 현재 NASA에서 제공되는 operational OMI HCHO 관측 값에서 에러를 발견하여,월평균 HCHO 자료의 시계열에 4 차 다항식을 피팅함으로써 구한 배경 모수화(parameterization)값을 이용하여 OMI HCHO 자료의 보정을 수행하였다. 보정후의 OMI HCHO는 동태평양과 서태평양 지역에서 -1.48%, 0.65%/year 경향성을 보였으며 이 수치는 GOME(-0.99%, 1.1%/year)과 SCAIMACHY(-0.92%, 0.03%/year)의 경향성과 유사한 결과이며 적절하게 비정상적인 배경 HCHO 농도의 증가가 제거되었음을 나타낸다. 이 자료의 검증과 분석은 EOF와 SVD 통계적 분석 방법을 사용하여 아프리카 지역에서 다양한 위성 관측 값과의 (HCHO, CO, NO2 그리고 firecount) 시공간 변동성의 일치성을 비교 분석함으로써 수행되었다. 아프리카에서 MOPITT CO, OMI NO2, SCIAMAHCY 그리고 OMI HCHO의 EOF와 SVD 분석 결과는 생태계화재(biomass burning)의 시공간 변동성 분포와 매우 높은 일치성을 보여준다. 그러나 OMI HCHO 관측 값은 화재가 가장 강하게 발생하는 지역의 풍하측에서 최대 값이 보이며, 화재 발생이 가장 높은 1월에 다소 낮은 HCHO 값이 보이는 등 시공간적으로 생태계 화제 분포와 차이를 보인다. 이것의 원인으로 우리는 이 지역의 열대우림의 식물활동(biogenic activity)영향으로는 설명할 수 없고, biomass burning 에어로졸에 의한 잘못된 AMF 계산이 OMI HCHO 산출에 사용됨으로써 발생한 오차라는 것을 밝혔다. AMF와 관련된 오차가 적절하게 보정된다면, 아프리카 지역의 HCHO 시공간 변동성은 생태계 화제의 변동성을 따를 것이라 예상된다. 따라서 본 연구는 통계적 기법이 위성 자료를 평가하는데 매우 효율적인 방법임을 제안한다. We have found an error in the operational OMI HCHO columns, and corrected it by applying a background parameterization derived on a 4th order polynomial fit to the time series of monthly average OMI HCHO data. The corrected OMI HCHO agrees with this understanding as well as with the other sensors measurements and has no unrealistic trends. A new scientific approach, statistical analyses with EOF and SVD, was adapted to reanalyze the consistency of the corrected OMI HCHO with other satellite measurements of HCHO, CO, NO2, and fire counts over Africa. The EOF and SVD analyses with MOPITT CO, OMI NO2, SCIAMAHCY, and OMI HCHO show the overall spatial and temporal pattern consistent with those of biomass burning over these regions. However, some discrepancies were observed from OMI HCHO over northern equatorial Africa during the northern biomass burning seasons: The maximum HCHO was found further downwind from where maximum fire counts occur and the minimum was found in January when biomass burning is strongest. The statistical analysis revealed that the influence of biogenic activity on HCHO wasn`t strong enough to cause the discrepancies, but it is caused by the error in OMI HCHO from using the wrong Air Mass Factor (AMF) associated with biomass burning aerosol. If the error is properly taken into consideration, the biomass burning is the strongest source of HCHO seasonality over the regions. This study suggested that the statistical tools are a very efficient method for evaluating satellite data.
한국 동물의 중독성 질병 발생상황 (1974년~2013년 6월)
이현경,배유찬,이보람,이경현,백강현,이명헌,Lee, Hyunkyoung,Bae, You-Chan,Lee, Boram,Lee, Kyunghyun,Baek, Kanghyun,Lee, Myoung-Heon 대한수의학회 2013 大韓獸醫學會誌 Vol.53 No.3
Animal poisoning has been occurred in Korea. However, the lack of the data about animal poisoning in Korea makes clinicians and diagnostician difficult to obtain information on poisoning cases. In this paper, we tried to gather information about animal poisoning from 1974 to June 2013 in Korea. Animal and Plant Quarantine Agency (QIA) record database were used to examine recent trends in animal poisoning. The analysis showed that the cattle was reported to be the most common species involved in animal poisoning and botulinum toxin constituted the primary group of toxicants. Animal poisoning occurred frequently on January and in Gyenggi-do. Although the data present in this manuscript is a little, it will be helpful to understand the general trend of animal poisoning in Korea.
정예지,정지열,허지웅,백강현,이종형,이명헌,윤순식,Jeong, Yea-Ji,Jung, Ji-Youl,Her, Ji-Woong,Baek, Kang-Hyun,Lee, Jong-Hyeong,Lee, Myoung-Heon,Yoon, Soon-Seek 대한수의학회 2015 大韓獸醫學會誌 Vol.55 No.2
Four 3-day-old piglets with retarded growth were submitted to the Animal and Plant Quarantine Agency for diagnosis. Necropsy showed that one piglet had black spots ranging from 2 mm to 1 cm in diameter in the cerebellum, lungs, regional lymph nodes, and cecum. Histological findings were consistent with the gross appearance in which melanin pigmentation was observed in the organs mentioned above. Based on Fontana-Masson staining, we diagnosed this animal with systemic melanosis. To the best of our knowledge, this is the first case of systemic melanosis in black breeds of swine in Korea.
류문영,정지열,이경현,허지웅,배유찬,이현경,백강현,이보람,진영화,김재명,이명헌,윤순식,Rhyoo, Moon-Young,Jung, Ji-Youl,Lee, Kyung-Hyun,Her, Ji-Woong,Bae, You-Chan,Lee, Hyun-Kyoung,Baek, Kang-Hyun,Lee, Bo-Ram,Jean, Young-Hwa,Kim, Jae-Myung 대한수의학회 2013 大韓獸醫學會誌 Vol.53 No.4
Two Korean black goat (approx. 2 and 3 years old) showing diarrhea and chronic weight loss were submitted to Animal and Plant Quarantine Agency. At necropsy, there were thickening of small intestine and enlargement of mesenteric lymph nodes. Microscopically, they had granulomatous enteritis in the small and large intestine and granulomatous lymphadenitis. By polymerase chain reaction (PCR) and acid fast stain, strong positive reaction and acid-fast rod bacteria were detected. According to the result of histopathology and PCR, we confirmed this case as Johne's disease. As far as we know, this is the first report of Johne's disease in Korean black goat.
임지희 ( Ji Hee Lim ),이현경 ( Hyun Kyoung Lee ),이경현 ( Kyung Hyun Lee ),백강현 ( Kang Hyun Baek ),이명헌 ( Myoung Heon Lee ),최은진 ( Eun Jin Choi ),배유찬 ( You Chan Bae ) 한국동물위생학회 2015 韓國家畜衛生學會誌 Vol.38 No.3
Epitheliogenesis imperfecta is a congenital disease in which localized or widespread defect areas of squamous epithelium of the skin. Epitheliogenesis imperfecta is rare anomaly of calves, piglets, foals, lambs, puppies, and kittens. Three cases of epitheliogenesis imperfecta in Korean indigenous calves were diagnosed in animal and Plant Quarantine Agency in 2011∼2014. In this paper, we tried to report them in detailed and compare with similar cases occurred in other countries.