of products made by sectioning off extrusions. Source: Courtesy of Kaiser Aluminum.
Types of Extrusion
Figure 15.3 Types of extrusion: (a) indirect; (b) hydrostatic; (c) lateral;
Process Variables in Direct Extrusion
Figure 15.4 Process variables in direct extrusion. The die angle, reduction in cross-section, extrusion speed, billet temperature, and lubrication all affect the extrusion pressure.
An airfoil or aerofoil is the shape of a wing, blade (of a propeller, rotor, or turbine),
or sail (as seen in cross-section).
An airfoil-shaped body moved through a fluid produces an aerodynamic force. The component of this force perpendicular to the direction of motion is called lift. The component parallel to the direction of motion is called drag. Subsonic flight airfoils have a character
h
A = Cross sectional area
(constant over
whole tank)
Flow resistance
all due to valve
In flow,
Out flow
그림1-1. 탱크 액위계
탱크에서 유출되는 유량과 액위와의 관계는 제곱근의 법칙(square root law)에 의하여
(1-1)
: 액위, : 유량법칙 상수
로 나타낼 수 있고,
BPI-LF (the Brief Pain Inventory-Long Form)
MPQ-SF (the McGill Pain Questionnaire Short Form)
The Lee Fatigue Scale.
BDI
General Sleep Disturbance Scale
SF-36(the Medical Outcomes Study Form 36)
Statistical Analysis System 9.1 사용
인구통계학적 자료
: chi-square test, Fisher's exact test사용
ordinal 자료
: Wilcoxon rank sum test 사용
통증에 대한