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간대성 전신 발작에 동반된 양측 근위 대퇴골 골절 -증례 보고-
이상호 ( Sang Hoo Lee ),송경섭 ( Kyeong Seop Song ),전승주 ( Seung Joo Jeon ),홍성환 ( Seong Hwan Hong ) 대한골절학회 2012 대한골절학회지 Vol.25 No.1
Simultaneous bilateral proximal femoral fractures are extremely rare, and a few have been reported in and outside the country. It may have various causes, and most cases were associated with major trauma, repetitive minor trauma, seizure, parathyroid or renal dysfunction, and anti-epileptic medications. We experienced a case of simultaneous bilateral proximal femoral fractures after generalized tonic-clonic seizure in a 70-year-old female. Herein, we report it with a review of the literature.
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저융점 원소의 첨가에 따른 Ti<sub>65</sub>Fe<sub>35</sub> 과공정 합금의 미세구조와 기계적 특성의 변화
황윤중,홍성환,김정태,김영석,박혜진,김희진,정연범,이영훈,김기범,Hwang, Yun Jung,Hong, Sung Hwan,Kim, Jeong Tae,Kim, Young Seok,Park, Hae Jin,Kim, Hee Jin,Jeong, Yeon Beom,Lee, Young Hoon,Kim, Ki Buem 한국재료학회 2017 한국재료학회지 Vol.27 No.10
The microstructural evolution and modulation of mechanical properties were investigated for a $Ti_{65}Fe_{35}$ hypereutectic alloy by addition of $Bi_{53}In_{47}$ eutectic alloys. The microstructure of these alloys changed with the additional BiIn elements from a typical dendrite-eutectic composite to a bimodal eutectic structure with primary dendrite phases. In particular, the primary dendrite phase changed from a TiFe intermetallic compound into a ${\beta}$-Ti solid solution despite their higher Fe content. Compressive tests at room temperature demonstrated that the yield strength slightly decreased but the plasticity evidently increased with an increasing Bi-In content, which led to the formation of a bimodal eutectic structure (${\beta}$-Ti/TiFe + ${\beta}$-Ti/BiIn containing phase). Furthermore, the (Ti65Fe35)95(Bi53In47)5 alloy exhibited optimized mechanical properties with high strength (1319MPa) and reasonable plasticity (14.2 %). The results of this study indicate that the transition of the eutectic structure, the type of primary phases and the supersaturation in the ${\beta}$-Ti phase are crucial factors for controlling the mechanical properties of the ultrafine dendrite-eutectic composites.
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이현직(Lee Hyun Jik),홍성환(Hong Sung Hwan) 대한공간정보학회 2010 대한공간정보학회지 Vol.18 No.3
홍수 시뮬레이션에서 중요한 요소는 강우량, 강우강도 등의 수리수문자료와 3차원 지형모델, 수리학적 홍수 계산모형으로 이 중 어느 한 정보의 정확도 및 신뢰성이 낮게 되면 홍수범람 예측 정보의 정확도 및 신뢰성의 확보가 어렵게 된다. 이에 본 연구는 기존 수치지도 및 현황도로 제작한 지형모델과 항공 LiDAR 데이터로 제작된 3차원 지형모델에 대하여 기존의 설계빈도별 홍수위에 따른 침수취약지역을 비교하여 3차원 지형모델의 정확도 차이로 인한 문제점을 분석하여 홍수 시뮬레이션에 대한 LiDAR데이터의 활용성을 제시하고자 하였다. The important factors in a flood simulation are hydrologic data (such as the rainfall and intensity), a three-dimensional terrain model, and the hydrologic inundation calculation matrix. Should any of these factors lack accuracy, flood prediction data becomes unreliable and imprecise. The three-dimensional terrain model is constructed based on existing digital maps, current map updates, and airborne LiDAR data. This research analyzes and offers ways to improve the model’s accuracy by comparing flood weakness areas selected according to the existing data on flood locations and design frequency.
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洪性換,廉容泰 고려대학교 의과대학 1991 고려대 의대 잡지 Vol.28 No.3
Recently. the urbanization rate of Korea reached up to 75% with the governmental effort of industrialization policy Accordingly, many of the poor in rural area moved into urban areas to make new slum in cities. It was inebitable for the slums to be medical1y underserved even the national insurance system would cover the whole country The insuranre capability did not include national health aspects such as disease prevention early detection of diseases. accessibillty of health care. and of others which remained as headache of the Government especially for the above urban slums. In light of above reasons. the Korea University performed a pilot health care service in Guro 6-dong in terms of urban primary health care services for 4 years from 1983 to 1986 with the grant from German Government. In this study. the authors evaluated the input and outcome of the project appling modern theories for evaluation. The results were as follows: 1. Evaluating the target area of the project. administrative1y it was composed of a total of 157 bans with 19 tongs. and a total of 14.164 inhabitants were living in 1.285 houses Comparatively. there were more of less educated and young adults of labourers who migrated from other cities or rural areas. 2 Input activities of public health nurse categorized into developmen of voluntary health resources. activation of existing health resourcrs.basic health services. health information collection. planning were calculated and evaluated. About 16% of working time for 4 years were spent for the abouve activities. For information collection and basic health services. the greatest amount of time were allocated. 3. In case of ancillary, there was no specific difference except the proportion of working time(17.7%) for 5 activities. 4. Analysing the enrollment of infant in wellbaby clinic of Guro Health Center in years of 1984 and 1986, increased performance rate attributable to service activity of target area was 44.7% and rate ratio of performance was 1.4. 5. Analysing the utilization frequency of family planning section of the Health Center in same way as above, increased performance rate attributable to service activity of target area was 17.4%, but rate ratio was incomparable becanse of negative increasement value of control area. 6. With the comparison results of the surveys on the antenatal care of pregnant women in 1982 and 1986 at target and control areas, it was revealed that increased performance(recognition of necessity) rate attributable to service activity of target area was 3.4% and rate ratio was 1.4 7. With the results of the above surveys, it was also revealed that increased performance rate of antenatal care attributable to service activity was 7.0% and rate ratio was 1.1. In short, the Korea University Urban P.H.C. services performed in Guro 6-dong from 1983 to 1986 was appraised to be positively valuable according to modern evaluation research methodologies. However, it can not be said that the project was performed efficiently and successfully because there was no comparative evaluation examples of the same methodology for similar urban PHC services at all in Korea.
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