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유한요소법을 이용한 Sputtering Coating 장치용 진공용기의 응력해석
이동명,오택열,한경천 경희대학교 산학협력기술연구원 1995 산학협력기술연구논문집 Vol.1 No.-
In this study, stress analysis of the vacuum chamber of sputtering coating equipment was performed and its safely was confirmed. In order to enhance the self-analysis ability of the manufacturer, computer program was developed using finite element technique. Since door and chamber flanges are known to be the weakest parts of the vacuum chamber, the flanges were meshed as bilinear rectangle elements and analyzed. The results are confirmed by commercial software, NASTRAN. The calculated stresses are low enough to modify the chamber structure. This study is expected to be the motivation and the foundations of computer analysis and design technique of the manufacturer.
회전익 항공기용 외활형식 착륙장치의 정ㆍ동적 분석에 관한 연구
유용석,이동명,채경덕,오택열 경희대학교 산학협력기술연구원 1996 산학협력기술연구논문집 Vol.2 No.-
It is important to make sure of design's reasonability concerning of structural vibration problems and safety with fulfilling the research and with analyzing the body structures that include the landing gear which has dynamic significant characteristics in helicopter, and to make systematical procedure which obtains engineering data to guarantee the quality of the helicopter that was developed by testing of parts, subsystems and body. In this study, Analysis of landing gear under FAR regulations was attempted, and systematical procedure for static and dynamic characteristics of the landing gear in many subsystems of the helicopter was classified.
Carbamazepine에 의한 가성림프종 증후군 1예
오경석,김현조,이성열,이종석,황규왕 대한피부과학회 2001 大韓皮膚科學會誌 Vol.39 No.9
The pseudolymphoma syndrome is characterized by a triad of fever, lymphadenopathy, and an erythematous rash. Although this syndrome has been well documented with phenytoin therapy, it is uncommon with carbamazepine. We report a of the pseudolymphoma syndrome due to carbamazepine in a 27-year-old man who had a triad of clinical symptoms.
골유도 재생술을 이용한 상악전치부 치조제 보존술 : 증례보고 A case report
오현정,김학주,박병기,노기성,조세열,한경윤,김병옥 朝鮮大學校 口腔生物學硏究所 1999 Oral Biology Research (Oral Biol Res) Vol.23 No.1
Alveolar ridge defects in the maxillary anterior portion resulted from extraction clue to mainly chronic periodontitis or trauma have required either removable restorations(to replace the tremendous amount of soft tissue loss) or modification of the pontic design. Both solutions leave a compromised esthetic result. Therefore, to achieve dental restoration in these cases, augmentation of the alveolar ridge must be performed. Altermatively, methods, that assure the preservation of the ridge following tooth extraction could prevent the need for alveolar augmentation. We present a clinical case treated with alveolar ridge preservation using guided bone regeneration technique following extraction of maxillary anterior tooth.
Oh-Hyun Lee,김영대,김중선,Nak-Hoon Son,박희남,정보영,Cheol Woong Yu,Hyun-Jong Lee,Woong Chol Kang,Eun-Seok Shin,Rak-kyeong Choi,Do-Sun Lim,Yo Han Jung,Hye-Yeon Choi,Kyung-Yul Lee,Bang-Hoon Cho,Sang Won Han,Joong 대한심장학회 2021 Korean Circulation Journal Vol.51 No.7
Background and Objectives: Prior studies have shown that stroke patients treated with percutaneous left atrial appendage occlusion (LAAO) for non-valvular atrial fibrillation (NVAF) experience better outcomes than similar patients treated with warfarin. We investigated the impact of percutaneous left atrial appendage closure on post-stroke neurological outcomes in NVAF patients, compared with non-vitamin K antagonist oral anticoagulant (NOAC) therapy. Methods: Medical records for 1,427 patients in multiple registries and for 1,792 consecutive patients at 6 Korean hospitals were reviewed with respect to LAAO or NOAC treatment. Stroke severity in patients who experienced ischemic stroke or transient ischemic attack after either treatment was assessed with modified Rankin Scale (mRS) scoring at hospital discharge and at 3 and 12 months post-stroke. Results: mRS scores were significantly lower in LAAO patients at 3 (p<0.01) and 12 months (p<0.01) post-stroke, despite no significant differences in scores before the ischemic cerebrovascular event (p=0.22). The occurrences of disabling ischemic stroke in the LAAO and NOAC groups were 36.7% and 44.2% at discharge (p=0.47), 23.3% and 44.2% at 3 months post-stroke (p=0.04), and 13.3% and 43.0% at 12 months post-stroke (p=0.01), respectively. Recovery rates for disabling ischemic stroke at discharge to 12 months post-stroke were significantly higher for LAAO patients (50.0%) than for NOAC patients (5.6%) (p<0.01). Conclusions: Percutaneous LAAO was associated with more favorable neurological outcomes after ischemic cerebrovascular event than NOAC treatment.
성인에서 발생한 Microsporum canis에 의한 두부 독창 1예
오경석,송무현,이성열,이종석,황규왕 대한의진균학회 2001 대한의진균학회지 Vol.6 No.4
Kerion celsi is an inflammatory type of tinea capitis and presents an inflammatory, boggy mass studded with broken hairs, oozing purulent material from follicular orifices. But it occurs usually in children and rarely in normal, healthy adults. We present an unusual case of kerion celsi caused by Microsporum canis in a 69-year-old woman. [Kor J Med Mycol 6(4): 232-234] Key Words: Tinea captis, Microsporum canis, Adult
Oh, Taek-Yul,Choi, Myung-Jin,Yu, Yong-Seok,Chae, Kyung-Duck The Korean Society of Mechanical Engineers 2000 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.14 No.3
Modern helicopter rotor blades with non-homogeneous cross sections, composed of anisotropic material, require highly sophisticated structural analysis because of various cross sectional geometry and material properties. They may be subjected by the combined axial, bending, and torsional loading, and the dynamic and static behaviors of rotor blades are seriously influenced by the structural coupling under rotating condition. To simplify the analysis procedure using one dimensional beam model, it is necessary to determine the principal coordinate of the rotor blade. In this study, a method for the determination of the principal coordinate including elastic and shear centers is presented, based upon continuum mechanics. The scheme is verified by comparing the results with confirmed experimental results.