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The reason a spacer GIF is invisible is so that an HTML developer can create a table cell and fill the background with a specific color that can be viewed through the transparent spacer GIF. For instance, a developer seeking to create a square blue box 500 pixels on a side could use a separate blue 500×500 graphic at the expense of additional ...
GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible. Only part of a graphic should be ...
It may also be helpful to know about their caffeine intake, if deep breathing or changing positions can stop the palpitations, or how the palpitations start and stop - do they begin and end suddenly or gradually, does the heartbeat feel regular or irregular, how fast does the pulse get during an episode, etc.
This is known as group-velocity dispersion and causes a short pulse of light to be broadened, as the different-frequency components within the pulse travel at different velocities. Group-velocity dispersion is quantified as the derivative of the reciprocal of the group velocity with respect to angular frequency , which results in group-velocity ...
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The disc is spun displaying the illusion of motion of a man jumping from a pole in a circle at the center of the disc and of a birds and butterflies in flight in a circle at the outer edge of the disc. Published in: McLean's optical illusions; or magic panorama. London, T. McLean, 1833. Exhibited: American Treasures of the Library of Congress ...
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Watson's water hammer pulse, also known as Corrigan's pulse or collapsing pulse, is the medical sign (seen in aortic regurgitation) which describes a pulse that is bounding and forceful, [1] rapidly increasing and subsequently collapsing, [2] as if it were the sound of a water hammer that was causing the pulse.