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김구(GU Kim),고성희(Seonghee Kho),기자영(Jayoung Ki),유영준(Youngjun Yu),정환호(Hwanho Jung) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
수중운동체의 설계최적화를 위한 수치해석 기법은 실험값을 보충에 주는 중요한 요소이기 때문에 필수적으로 이에 대한 검증이 필요하다. SUBOFF bare hull에 대한 계산 값과 실험값을 비교하여 일치하는 경향을 확인하였다. DARPA SUBOFF model의 압력분포패턴과 압력계수에 대해서는 solver들간 비슷한 경향을 확인하였다. 항력계수 계산결과, OpenFOAM을 이용한 계산 값이 상용코드 계산값보다 약 10% 정도 큰 값으로 계산되었다. Numerical techniques to optimize an underwater vehicle is important to supply evaluation of experimental values, which have to be verified. The values between experimental values and calculation values are slightly same in SUBOFF bare hull benchmark test. the trends of Pressure distribution and pressure coefficient of DARPA SUBOFF model are almost same. As results of force coefficient, the difference between commercial code and openFoam is about 10%.
정상안에서 Pressure Eye Patch가 외안부에 미치는 영향
김재호,온영훈,신환호,정순국 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.1
Immobilizaiton of eyelids by pressure eye patch may relieve photophobia and some ocular pain. Although many ophthalmologists prefer pressure eye patch after operation and ocular trauma, it was not considered that eye patch may induce some ocular symptoms. We therefore studied the effects of pressure eye patch in normal eyes of healthy young adults. Thirty two medical students and doctors participated in this study. The pressure eye patch in normal eyes of healthy young adults. Thirty two medical students and doctors participated in this study. The pressure eye patch was applied for 14 hours on one eye of participants. Both eyes of all participants were examined twice, before and after patching. The examination included opthalmic examination and questionnaire of subject symptoms. Each symptom and sign was graded on a scale from 0 to 3. The scores were statistically evaluated by using the the Wilcoxon signed-rank test. In group 1 (patched eyes), 30 of 32 participants had clinical symptoms and signs. In comparison between group 1 (patched eyes) and group 2 (unpatched eyes), participants in the group 1 had more symptoms and signs such as discomfort (P<0.01), itching (P<0.01), congestion (P<0.01) and irregular astigmatism (P<0.01). Thus we concluded that complicaitons of varialbe severity and shape were induced by eye patch in normal eyes. So we considered that Eye Patch ater operation and trauma may contribute the above mentioned complicaitons and we must doing this procedure cautously.
김수민,조사현,조세인,계기성,여환호,김영균,정재현 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1
We experienced 152 endosseous implant surgery and prosthodontic restoration with edentulous jaw for 5 years from Mar. 1990. to Oct. 1995. 422 fixtures were implanted. the ratio of male to female was 1.38 : 1 and the range of age from 16 to 74 years. Most dominant group was 41 to 50 years group(36%). In our study, implant success rates showed 96% in mandible and 92% in maxilla. The major causes of implant failure of primery osseointegration(75%), overloading(15%), neurologic problem(5%), psychologic problem(5%).