نتایج جستجو برای: elasticity factor
تعداد نتایج: 867429 فیلتر نتایج به سال:
BACKGROUND While skin resurfacing using pulsed carbon dioxide lasers appears to have a skin-tightening effect clinically, the debate continues over its actual effects on dermal collagen. OBJECTIVES To provide quantitative measures of skin elasticity changes associated with pulsed carbon dioxide laser skin resurfacing and to introduce to the facial plastic surgery community the Cutometer SEM 5...
PURPOSE To develop a method for evaluating viscosity and elasticity of the cornea and to examine the effect that both properties have on hysteresis. METHODS A three-component spring and dashpot model was created in Simulink in Matlab to represent the purely elastic and viscoelastic behavior of the cornea during a measurement using device called an ocular response analyzer (ORA). Values for el...
Elasticity of the child rib cortical bone is poorly known due to the difficulties in obtaining specimens to perform conventional tests. It was shown on the femoral cortical bone that elasticity is strongly correlated with density for both children and adults through a unique relationship. Thus, it is assumed that the relationships between the elasticity and density of adult rib cortical bones c...
A plane static symmetric problem of theory elasticity for a piecewise homogeneous isotropic with an interface in the form sides angle, containing small-scale interfacial shear cracks at corner point and loaded internal semi-infinite crack, was considered. The exact solution to this constructed by Wiener-Hopf method combination apparatus Mellin integral transform. stress intensity factor tips de...
I revisit the productivity slowdown debate by estimating capital-labor elasticity and bias of technical change for U.S. economy under four different models change. One with constant growth rates, one a structural break in which is linear, flexible time-varying rates. find evidence support non-constant rates factor-augmenting Labor-augmenting are decelerating, while capital-augmenting non neglig...
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