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이충완,유승흠,오희철,Lee, Choong-Wan,Yu, Seung-Hum,Oh, Hee-Choul 대한예방의학회 1990 예방의학회지 Vol.23 No.4
This study was designed to investigate the mar factors affecting selection of delivery facilities by pregnant women. Five hundred women hospitalized at 23 Seoul-area delivery facilities, such as university hospitals, general hospitals, hospitals, and clinics were selected and given questionnaires from April 24 to May 7, 1990. A total of 350 questionnaires were collected and analysed for the study. The results are as follows ; 1. In general, variables which significantly affected the choice of delivery facilities included the age of women, their educational level, the educational level of their husbands, monthly average incomes and residential areas. 2. In analyzing the obstetrical characteristics of the women, those variables significantly affecting the choice of delivery facilities were the gestational period, the facilities for prenatal care, the frequency of prenatal care, the type of delivery, the frequency of miscarriage, previous delivery experiences and the awareness on prenatal care. 3. In comparing the motivation factors for selecting the delivery facilities, all the factors except convenience and need for hospitalization differed significantly among delivery facilities. 4. The factor analysis was assessed for twenty possible factors motivating the choice of delivery facilities. Six factors including personal service, scale of the facility, reputation, urgency, convenience, and experience were noted explaining by 57.7%. 5. In the discriminant analysis used to clarify the major factors affecting the selection of delivery facilities, the 16 significant variables were regarded as independent variables, and the type of delivery facilities was considered a dependent variable. The stepwise method was applied to the analysis. Detected discriminant variables were the facilities for prenatal care, scale factor, personal service factor, urgency factor, convenience factor, reputation factor, experience factor, gestational period, types of delivery, frequency of miscarriage, age and income. These 12 discriminant variables were tested, with reference to discriminant prediction, on their importance in the choice of the delivery facility, by the discriminant functional formula. The test showed a hit-rate of 67.7%. The results suggest that general characteristics, obstetrical characteristics, and motivations for selecting the delivery facilities differ significantly according to the types of the delivery facilities. This study implies that all types of delivery facilities should attempt to acommodate characteristics and motivations of pregnant women. The facilities should be prepared to increase their patients satisfaction with required medical conditions by improving service and responding to the pregnant women's preferences.
최준섭,이충완 한국기술교육학회 2006 한국기술교육학회지 Vol.6 No.2
A learning compact wind tunnel was developed in order for the student to increase the interests and attitudes in transportation technology. The developed wind tunnel has some performances and characteristics as follows: (1) The Fluid-flow field uniformity of developed wind tunnel was increased from 21.85 % to 2.43 % by providing the honeycomb apparatus, and maximum velocity of fluid-flow field is 6.33 ㎧ with test section size of 100 ㎜ × 100 ㎜. (2) The developed wind tunnel will enable the students to have the concept of qualitative and quantitative understanding on transportation field such as airplanes, automobiles, and so on. (3) A hands-on education of transportation field will be carried out with the developed wind tunnel, and the developed wind tunnel also can be used for the improvement of existing teaching-learning environment of class.
바닥 복사 난방 시 바닥 온도와 거주자 자세 변화에 따른 인체 반응 연구
김세환(Se-Hwan Kim),김수민(Su-Min Kim),이충완(Choong-Wan Lee),이민호(Min-Ho Lee),김동규(Dong-Gyu Kim) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
The floor heating system is well known for being comfortable, is little different between the upper and lower sides, and the range of curren steam air and radiation is equal insde. Floor heating system does not spread the dust and germs since it's not heated by hot current stream air unlike convection heating system or hot air heating system whose principle is hot air in the lower side convects and makes it dry. Moreover, it has been reported that floor temperature control system is much better than convection control system which control the current air temperature for energy saving. This paper study how the body responds to the change of posture such as sitting and standing using floor radiation heating system.