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The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd , who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).
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In computing, an avatar is a graphical representation of a user, the user's character, or persona. Avatars can be two-dimensional icons in Internet forums and other online communities, where they are also known as profile pictures , userpics , or formerly picons (personal icons, or possibly "picture icons").
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Wikipedia This is a featured picture on the English language Wikipedia (Featured pictures) and is considered one of the finest images.See its nomination here. This is a featured picture on the Persian language Wikipedia (نگارههای برگزیده) and is considered one of the finest images.
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