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이중원,김대윤,이용길.Joong Won Lee. M.D.. Dae Yune Kim. M.D.. Yong Kil Lee. M.D. 대한안과학회 2007 대한안과학회지 Vol.48 No.2
Purpose: To report two cases of deepening of the upper lid sulcus following bimatoprost. Methods: A 54-year-old woman who used bimatoprost for one week and a 70-year-old woman who used bimatoprost for 4 months developed deep lid sulcus. Both were using bimatoprost for glaucoma treatment. Results: Both patients also showed improvement of dermatochalasis and widening of the palpebral fissure. One week after discontinuing bimatoprost, the lid sulcus of the 54-year-old returned to baseline and exophthalmometry was unchanged. The orbital CT of the 70-year-old was normal. She did not complain about deepening of the lid sulcus, and she has not discontinued treatment due to this adverse effect.
이중원,김광수,강정훈,Joong Won Lee,Kwang Su Kim,Jung Hoon Kang 대한안과학회 2008 대한안과학회지 Vol.49 No.5
Purpose: To examine the results of minimal stitch on the restoration of tissue after canalicular laceration. Methods: We have operated using sutures of tissues around canalicular laceration by inserting bicanalicular silicone stents and minimal horizontal mattress sutures with 8-0 Vicryl in cases of canalicular laceration instead of the existing method for the past 6 years. The ages of patients ranged from 2 to 76 years (average age 39.8 ±17.4 years), with most patients in their thirties (12 patients, 40%), 30 cases underwent canalicular repair with minimal stitch and bicanalicular silicone stent insertion within 24 hours after trauma. The silicone stent was removed 3 months after the operation if the patient did not complain of epiphroa while the canalicular remained open. Results: Twenty-five eyes (83.3%) showed symptom improvement and good passage in lacrimal syringing test in 4~12 months (average: 6.8±2.2 months) of follow-up study. Complications included one case each of fistula formation, stent prolapse, and wound infection, and two cases of canalicular stenosis. Conclusions: We recommend this method because of its satisfying success ratio.
LCD 도광판 두께에 따른 휘도 및 잔류응력에 관한 연구
이중원(Joong Won Lee),박명균(Myung Kyun Park),김정훈(Jung Hoon Kim) Korean Society for Precision Engineering 2008 한국정밀공학회지 Vol.25 No.9
Light guide plate is one of most important components which are composed of back light unit, affecting the quality and performance of LCD. Average brightness and uniformity are especially key factors for designing the light guide unit. These qualities are affected and controlled by the pattern being attached to the back of light guide unit. In order to obtain high brightness and uniformity the optimized pattern design is adopted for LGP. In this study, optimized molding condition for LGP with 0.4 ㎜ thickness was obtained by using the Moldflow simulation software and the optimized pattern for better brightness uniformity was designed for the thickness of the 0.4 ㎜ by trial and error method. The brightness was measured for the different LGP thicknesses and the residual stress analysis was performed for 0.4 ㎜ thickness by the photoelasticity and the results are compared with 0.5 ㎜, 0.6 ㎜ thickness.
이중원(Lee Joong-Won) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.1
When reinforced concrete is subjected to high temperatures, compressive strength and elastic modulus of concrete, ductility and yield stress of steel decrease. Degradation of these properties after such an exposure may result in undesirable structural failures and are great importance in terms of the serviceability of buildings. Therefore, changes in material's properties have to be evaluated in decide whether the buildings exposed to high temperature effect will be repaired or demolished. Assessment of fire damaged concrete usually starts with visual observation of color change, crazing, cracking, and spalling. On heating, a change in color from normal to a pink/red is often observed and this is useful since it coincides with the onset of significant loss of concrete strength. The purpose of this study is to quantify changes in color for concrete using spectrophotometric method and to identify the relationship between color change and residual compressive strength loss of concrete as temperature increases. For this purpose, we manufactured concrete samples with varying water-to-cement ratios and heated them to target temperatures of 100, 200, 300, 400, 500, 600, 700 and 800℃ in an electric oven, whereupon their color changes and residual compressive strengths were measured for analysis. The result of the study shows that color change and residual compressive strength in a concrete structure exposed to high temperature have a consistent relationship in quantitative equation, therefore, it may be possible to know how much compressive strength of the concrete reduces by measuring color changes and estimating heating temperature.