In biology, the two terms are used interchangeably, but in the general biological science these terms are used in a particular manner that is generally accepted in many cases. It is difficult to identify, precisely, a manner in which the terms dilation and dilatation are used in biology. Therefore, the general usage of these terms in physiology and medicine could be laid out as follows.
In special relativity, an observer in inertial i. A second inertial observer, who is in relative motion with respect to the first, however, will disagree with the first observer regarding which events are simultaneous with that given event. Neither observer is wrong in this determination; rather, their disagreement merely reflects the fact that simultaneity is an observer-dependent notion in special relativity.
A notion of simultaneity is required in order to make a comparison of the rates of clocks carried by the two observers. Suppose one of two twins carrying a clock departs on a rocket ship from the other twin, an inertial observer, at a certain time, and they rejoin at a later time.
In accordance with the time-dilation effect, the elapsed time on the clock of the twin on the rocket ship will be smaller than that of the inertial observer twin—i.
The time-dilation effect predicted by special relativity has been accurately confirmed by observations of the increased lifetime of unstable elementary particles traveling at nearly the speed of light.
The clock paradox effect also has been substantiated by experiments comparing the elapsed time of an atomic clock on Earth with that of an atomic clock flown in an airplane.
The latter experiments, furthermore, have confirmed a gravitational contribution to time dilation, as predicted by the theory of general relativity.of patients in the balloon dilation group demonstrated tympanogram normalization (52%) compared with the medical management group (14%) at 6 weeks and reported a reduction in symptoms at 6 weeks on the ETDQ.
Dilation Dilation has been used for millions of years.
Even in the ancient times and still we use it until this day. An example of dilation used in ancient times is when ancient Egyptians built the pyramids.
dilatation (attheheels.comne) submitted 4 years ago * by tirral MD Neurophysiology I've seen both words used to describe interventional, pathologic, and physiologic expansion of ducts/vessels, and the usage of one or the other seems to come down to authorial preference.
A dilation and curettage procedure, also called a D&C, is a surgical procedure in which the cervix (lower, narrow part of the uterus) is dilated (expanded) so that the uterine lining (endometrium) can be scraped with a curette (spoon-shaped instrument) to remove abnormal tissues.
Various methods have been used to perform or attempt an abortion, including the administration of abortifacient herbs, the use of sharpened implements, the application of .
Active esophageal perforation is an absolute contraindication to esophageal dilation. History of previous esophageal perforation is a relative contraindication to future dilations and extreme caution should be .