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한.중.일 전통 수납류가구의 유사성과 상이성에 관한 비교 연구
하재경,Ha, Jae-Kyung 한국디지털건축·인테리어학회 2007 한국디지털건축인테리어학회 논문집 Vol.7 No.1
Purpose of this paper is find the similarity and dissimilarity of Korean, Chinese and Japanese traditional furnitures for storage. Also this paper tries to have a comparative analysis on life style, characteristics of housing space and furniture's form of three countries. The study can be summarized as follows. First, space scale and seat levels of three countries are related to furniture's height and form, so that Chinese furniture have over scale than human, and Japanese furniture have the type of box for stacking. Second, the way of heating and materials of floors are concerned with the type of furniture's legs. Third, even if these dissimilarities, the aesthetic characteristics of three countries furniture would be a data base for making design identity of East Asian modern housing furniture.
A Comparative Study on Korean and Chinese Traditional Furniture based on the Life Style
하재경,홍승대,Ha, Jae-Kyung,Hong, Sung-De Korean Digital Architecture-Interior Association 2006 한국디지털건축인테리어학회 논문집 Vol.6 No.1
Korea and China have had close relations not only geographically but also ideally and culturally throughout history. Regarding their lifestyles on housing patterns, however, Koreans had a sedentary way of life, usually sitting on the floor while Chinese had a standing lifestyle, sitting on a chair. This paper tries to have a comparative analysis on similarities and distinctions of two countries' traditional furniture that had complied with each lifestyle. This paper also aims to explore the similarities and distinctions of the form and function of the traditional furniture of the two countries and then to put results of this paper in design and plan of modern furniture and housing in our times. The study can be summarized as follows. Even if, cultural and historical relationships of two countries, there is a different of traditional furniture's forms and types. The major differences are as following : Korean furniture is predominantly on the floor level with storing furniture while Chinese one is intermixed with seat-level and floor level styles. These characters seem to be derived from their own housing and life style. In Ming and Qing period China, Their developed in which intermediate people and building. But, in Korea their housing style had floating floor against wet earth, which finished woods, Ondol. Because of these finishing, the Korean traditional furniture was developed into a good form and a suitable dimension for moving. These differences in furnishing style seemed to well reflect building and housing style of each country. And Image map and positioning map can show the differences in a whole aspect.
유연생산 시스템 구축을 위한 공작물 자동교환 유닛의 수평 이송 기구 설계에 관한 연구(파트 2)
박후명(Hoo-Myung Park),성재경(Jae-Kyung Sung),이용중(Yong-Joong Lee),하만경(Man-Kyung Ha) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.2
The objective of this study is to develop an automatic object changer unit to improve processing problems existed in the conventional horizontal machining center. To achieve this goal, this study designed a horizontal transfer as the second project continued to the first project that designed a upward and downward traverse unit. A horizontal traverse unit shows a symmetric structure and consists of frame, which consists of four unit tools, motor and reducer, which are fixed at a frame, operation unit with pinions, first traverse unit, and second traverse unit. Constraint conditions based on the operation mechanism with these elements were configured and obtained following results after modeling a model for a traverse motor. In the kinematic expression of sliding motion with one degree of freedom, the sliding motion is constrained. Also, the rack 3 installed at a frame is used to configure possible kinematic constraint conditions of the rack 2 according to the rolling motion of the pinion 2 in the first traverse unit. In addition, the moment of inertia that is a type of kinetic energy in a converted horizontal traverse unit in the side of the reducer can be applied to introduce the moment of inertia of a converted horizontal traverse unit in the side of the reducer by using the sum of kinetic energy in the rack and pinion, which is a part of the horizontal traverse unit. Also, the equation of motion of the converted upward and downward traverse unit in the side of the motor using the equation of motion of the motor. Furthermore, the horizontal traverse unit predetermines the mass of the first and second traverse unit and applied load including the radius and reduction ratio of the pitch circle in the pinion 1 and applied load to the rack 2. Then, a proper motor can be determined using several parameters in the upward and downward traverse unit in order to verify such predetermined specifications. In future studies later this study, a simulation that verifies the results of the previous two stages of studies using a finite element method.
급성 심근경색증에서 관상동맥 중재술시 발생하는 reflow disturbance 현상의 위험인자
안성규 ( Sung Gyu An ),오준혁 ( Jun Hyok Oh ),박태익 ( Tae Ik Park ),이상현 ( Sang Hyun Lee ),장형하 ( Hyung Ha Jang ),이동원 ( Dong Won Lee ),하재경 ( Jae Kyung Ha ),이한철 ( Han Cheol Lee ),김준 ( Jun Kim ),김준홍 ( June Hong K 대한내과학회 2008 대한내과학회지 Vol.74 No.1
목적: Reflow disturbance 현상은 급성 심근경색증으로 관상동맥 중재술을 받는 환자의 예후를 악화시키는 중요한 요인이다. 본 연구는 급성 심근경색증 환자에게 스텐트를 이용한 경피적 관상동맥 중재술을 시행할 경우 reflow disturbance 현상의 발생빈도와 위험인자를 분석하고자 하였다. 방법: 2003년 2월부터 2005년 6월까지 급성 심근경색증으로 부산대학교병원을 방문하여 경피적 관상동맥 중재술을 성공적으로 받은 475명의 환자를 대상으로 연령, 성별, 흡연, 당뇨, 고혈압의 병력, 심전도 기록, 혈액학적 검사 그리고 관상동맥조영술 소견을 후향적으로 분석하였다. 결과: 475명의 대상 환자 중 86.3%인 410명에서 정상적인 혈류가 관찰되었으며(normal flow 군), 13.7%인 65명에서 reflow disturbance 현상이 관찰되었다(reflow disturbance 군). 재관류 시간이 142시간 이후에서는 reflow disturbance 현상이 관찰되지 않았다. 재관류 시간이 142시간 이내인 경우를 대상으로 다변량 분석을 시행한 결과, 연령(OR=1.03, 95% CI 1.01~1.06, p=0.020), 낮은 수축기 혈압(OR=0.98, 95% CI 0.97~0.99, p=0.026) 그리고 혈전이 있는 경우(OR=2.27 95% CI 1.08~4.79, p=0.031)가 reflow disturbance 현상의 유의한 독립적 위험인자였다. 결론: 급성 심근경색증으로 관상동맥 중재술을 받는 환자에서 고령, 낮은 수축기 혈압 그리고 혈전의 존재가 reflow disturbance 현상의 독립적인 위험인자로, 이러한 요인을 가진 경우는 시술시 주의가 필요하리라 사료된다. Background/Aims: The reflow disturbance phenomenon is associated with poor functional and clinical outcomes for patients suffering with acute myocardial infarction (AMI). In the era of primary coronary intervention (PCI), accurately identifying those lesions that are at a high risk of no-reflow is of crucial importance. Therefore, we investigated the risk factors of the reflow disturbance phenomenon in AMI patients who underwent PCI. Methods: From February 2003 to June 2005, the clinical and angiographic characteristics of 475 patients who had undergone PCI were reviewed retrospectively. Results: 65 patients (13.7%) showed the reflow disturbance phenomenon and the reperfusion times of the reflow disturbance group ranged from 1 hour to 142 hours. On univariate analysis, an older age (p<0.001), low systolic blood pressure (p=0.01), no thrombolysis followed by PCI (p<0.001), primary PCI (p<0.001), less time to PCI (p=0.001), a high peak serum CK-MB level (p=0.013), angiographically visible thrombus (p=0.016), a low pre-TIMI grade (p=0.021) and ST segment elevation on the ECG (p=0.002) were the significant risk factors of the reflow disturbance phenomenon. An older age, a low systolic BP and angiographically visible thrombus were significant risk factors on multivariate analysis. Conclusion: An older age, low systolic blood pressure and angiographically visible thrombus were the independent risk factors for the reflow disturbance phenonmenon in AMI patients who undergo PCI. (Korean J Med 74:16-22, 2008)