منابع مشابه
The formation of epithelial tubes.
Introduction Tubular organs are the thoroughfares through which the gases and liquids that sustain life are transported. Such organs also often serve as factories for the synthesis and delivery of the hormones and enzymes that are essential for tissue homeostasis and energy metabolism. Examples of tubular organs in mammals include the blood vessels, kidneys, lungs, pancreas, and the mammary, sa...
متن کاملThe Abuse of Drainage Tubes.
lhead of the tibia the horizontally shaded portion represents the extent to whiclh the upper and posterior portion of the head of the tibia is covered. The dotted line running from the top of the capsule from before backwards (throuah the vertically slhaded portion) shows the extent to wlicih the outer side of the shaft is overlapped. Fig. 3 is from a skiagram taken with the knee in semiflexion...
متن کاملRubber tubes in the sea.
A long tube with elastic walls containing water is immersed in the sea aligned in the direction of wave travel. The waves generate bulges that propagate at a speed determined by the distensibility of the tube. If the bulge speed is close to the phase velocity of the waves, there is a resonant transfer of energy from the sea wave to the bulge. At the end of the tube, useful energy can be extract...
متن کاملPhotomultiplier Tubes
Light which enters a photomultiplier tube is detected and produces an output signal through the following processes. (1) Light passes through the input window. (2) Light excites the electrons in the photocathode so that photoelectrons are emitted into the vacuum (external photoelectric effect). (3) Photoelectrons are accelerated and focused by the focusing electrode onto the first dynode where ...
متن کاملMulti-objective Crashworthiness Optimization of the Aluminum Foam-filled Tubes
In order to reduce both the weight of vehicles and the damage of occupants in a crash event simultaneously, it is necessary to perform a multi-objective optimization of the automotive energy absorbing components. In this paper, axial impact crushing behavior of the aluminum foam-filled thin-walled tubes are studied by the finite element method using commercial software ABAQUS. Comparison of the...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2011
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(11)70295-4