http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 羅椿和 (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
-
Subtraction法을 利用한 顎關節 X-線寫眞 判讀에 關한 硏究
羅椿和,劉東洙 大韓口腔顎顔面 放射線學會 1987 Imaging Science in Dentistry Vol.17 No.1
The purpose of this study is to know the value of the photographic subtraction technic in the transcranial oblique lateral projection of the TMJ. The author examined the transcranial oblique lateral projection radiographs which comprise 50 cases of 32 persons, compared the transcranial oblique lateral projection films and those subtraction films. The following results were obtained. 1) The condyle at closed jaw position had showed a reversed tone image, but the condyle at the opening position had showed a re-reversed ordinary image. Both condyles had showed one subtraction film because radiographic interpretation of TMJ was easy. 2) On 50 cases of subtraction films, 46 cases had showed same radiographic images compared with trascranial oblique lateral projection films. Four cases (3 cases of erosion, 1 cases of sclerosis) had showed additional changes of images so that capability of interpretation was improved.
-
방사선 조사시기에 따른 백서 설상피의 기저세포에 미치는 영향에 관한 연구
나춘화,유동수,Na Chun-Hwa,You Dong-Soo 대한영상치의학회 1995 Imaging Science in Dentistry Vol.25 No.2
The purpose of this study was to investigate chronic radiation effects on the basal cell of the rat tongue epithelium according to different irradiation timing. Forty-two female rats were devided into 5 experimental groups according to different irradiation timing and were irradiated single dose of 396cGy by MK cell irradiator using Cs-137. Experimental rats were sacrificed at the 2nd week, 4th week and 6th week after birth. The specimens were examined with light microscope and transmission electron microscope. The following results were obtained. 1. The first changes after irraditation were vacuoles. The vacuoles were chiefly observed in the cytoplasm, perinuclei area, and nuclei. 2. The most severe degenerative changes in the basal cell layer were observed in all experimental groups. ; cellular disarrangement, vacuole formation, widening of intercellular space, enlarged mitochondria & rER, and chromatin clumping were seen. 3. The cellular degenerative changes were most severe at the 4th week after birth in all experimental group, and the basal cell hyperplasia was seen at the 6th week in the most of experimental groups 4. The experimental groups 3 and 4 show more severe and more prolonged cellular degeneration than experimental groups 1 and 2, which were irradiated in pregnancy, and experimental group 5, which was irradiated after tongue maturation.
-
김철희,나진균,박철진,박진호,임차순,윤이,김민섭,박춘화,김용준 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.5
The statistical indexes such as RMSE(Root Mean Square Error), Mean Bias errer, and IOA(Index of agreement) are used to evaluate 3 Dimensional wind and temperature fields predicted by operational meteorological model RAMS(Regional Atmospheric Meteorological System) implemented in CARIS(Chemical Accident Response Information System) for the dispersion forecast of hazardous chemicals in case of the chemical accidents in Korea. The operational atmospheric model, RAMS in CARIS are designed to use GDAPS, GTS, and AWS meteorological data obtained from KMA(Korean Meteorological Administration) for the generation of 3-dimensional initial meteorological field. The predicted meteorological variables such as wind speed, wind direction, temperature, and precipitation amount, during 19~23, August 2002, are extracted at the nearest grid point to the meteorological monitoring sites, and validated against the observations located over the Korean peninsula. The results show that Mean bias and Root Mean Square Error are 0.9(m/s), 1.85(m/s) for wind speed at 10m above the ground, respectively, and 1.45(℃), 2.82(℃) for surface temperature. Of particular interest is the distribution of forecastion error predicted by RAMS with respect to the altitude; relatively smaller error is found in the near-surface atmosphere for wind and temperature fields, while it grows larger as the altitude increases. 0verall, some of the overpredictions in comparisons with the observations are detected for wind and temperature fields, whereas relatively small errors are found in the near surface atmosphere. This discrepancies are partly attributed to the oversimplified spacing of soil, soil contents and initial temperature fields, suggesting some improvement could probably be gained if the sub-grid scale nature of moisture and temperature fields was taken into account. However, IOA values for the wind field(0.62) as well as temperature field(0.78) is grater than the 'good' value criteria(>0.5) implied by other studies. The good value of IOA along with relatively small wind field error in the near surface atmosphere implies that, on the basis of current meteological data for initial fields, RAMS has good potentials to be used as a operational meteorogical model in predicting the urban or local scale 3-dimensional wind fields for the dispersion forecast in association with hazardous chemical releases in Korea.
-
유해화학물질 관련 대기오염사고 대응을 위한 화학물질사고대응정보시스템 (CARIS)
김철희 ( C. H. Kim ),박철진 ( C. J. Park ),임차순 ( C. S. Im ),김민섭 ( M. S. Kim ),박춘화 ( C. H. Park ),천광수 ( K. S. Chun ),나진균 ( J. G. NA ) 한국환경영향평가학회 2003 환경영향평가 Vol.12 No.1
The emergency response modeling system CARIS has been developed at CCSM (Center for Chemical Safety Management),NIER(National Institute of Environmental Research) to track and predict dispersion of hazardous chemicals in Korea. The main objective of CARIS is to support making decision by rapidly providing the key information on the efficient emergency response of hazardous chemical accidents for effective approaches to risk management. In particular, the integrated modeling system in CARIS consisting of a real-time numerical weather forecasting model and air pollution dispersion model is supplemented for the diffusion forecasts of hazardous chemicals, covering a wide range of scales and applications for atmospheric information. In this paper, we introduces the overview of components of CARIS and described the operational modeling system and its configurations of coupling/integration in CARIS. Some examples of the operational modeling system is presented and discussed for the real-time risk assessments of hazardous chemicals.
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
