음영효과를 고려한 2차원 밀폐공간 내 물체에서의 복사열전달 경계요소 해법
Boundary Element Solution Methods Considering the Shadow Effects for Radiative Heat Transfer with Objects inside a 2-D Enclosure
Nowadays, a hypertension becomes the common disease and accounts for larger percentage of interest in the medical academic field. One of the most common blood pressure measurement technique is the non-invasive method. When a larger cuff is used by comparing to the upper-arm circumference of the subject, the blood pressure is measured lower than expected. Conversely, the value obtained by it is higher than normal case if a smaller cuff size is used. In this experimental study, 400 pairs of simultaneous blood pressure measurements on 50 subjects were obtained by the auscultatory and the oscillometric methods respectively by using three kinds of cuff sizes(Small, Medium and Large). Experimental identification for blood pressure differences due to the cuff size was proceeded. Also, cuff size standard for Korean was presented to obtain more accurate blood pressure according to the arm circumferences. As the result of this study, the selection of the appropriate cuff size was found to be very important because the main factors influencing the accuracy of the oscillometric blood pressure measurement was the cuff size by depending on the arm circumference of the subject.
목차
Abstract 1. 서론 2. 복사열전달 지배방정식의 구성 3. RTE의 경계요소식 4. 수치적분의 실행 5. 수치해석 결과 및 고찰 6. 결론 References
키워드
Radiation Heat Transfer(복사열전달)Boundary Element Method(경계요소법)Shadow Effects(음영효과)Transparent Medium(투과매질)Diffuse-Gray Surface(확산-회체 표면)Radiation Transfer Equation(복사전달방정식)Concentric Cylinder(동심원 실린더)Square Duct(직사각형 덕트)