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In the theory of autowave phenomena an autowave reverberator is an autowave vortex in a two-dimensional active medium.〔 A reverberator appears a result of a rupture in the front of a plane autowave. Such a rupture may occur, for example, via collision of the front with a nonexcitable obstacle. In this case, depending on the conditions, either of two phenomena may arise: a ''spiral wave'', which rotates around the obstacle, or an ''autowave reverberator'' which rotates with its tip free. == Introduction == The ''reverberator'' was one of the first autowave solutions, researchers found, and, because of this historical context, it remains by nowadays the most studied autowave object. Up until the late 20th century, the term "''auto-wave reverberator''" was used very active and widely in the scientific literature, written by soviet authors, because of active developing these investigations in USSR (for more details, see "A brief history of autowave researches" in Autowave). And, inasmuch as the soviet scientific literature was very often republished in English translation (see e.g.〔〔〔〔), the term "''autowave reverberator''" became known also in English-speaking countries. The ''reverberator'' is often confused with another state of the active medium, which is similar to it, - with the ''spiral wave''. Indeed, at a superficial glance, these two autowave solutions look almost identical. Moreover, the situation is further complicated by the fact that the spiral wave may under certain circumstances become the reverberator, and the reverberator may, on the contrary, become the spiral wave! However, it must be remembered that many features of ''rotating autowaves'' were quite thoroughly studied as long ago as the 1970s, and already at that time some significant differences in properties of a spiral wave and a reverberator were revealed. Unfortunately, all the detailed knowledge from those years remains now scattered in different publications of the 1970-1990s, which became little-known now even for the new generations of researchers, not to mention the people that are far from this research topic. Perhaps, the only book in that it were more or less completely brought together in the form of abstracts basic information about autowaves, known at the time of its publication, remains still the Proceedings „Autowave processes in systems with diffusion“,〔 which was published in 1981 and became already a rare bibliographic edition in nowadays; its content was partially reiterated in another book〔 in 2009. The differences between a reverberator and a spiral wave are considered below in detail. But for the beginning it is useful to demonstrate these differences with a simple analogy. Everyone knows well the seasons of a year... Under some conditions, winter can turn into summer, and summer, on the contrary, into winter; and, moreover, these miraculous transformations occur quite regularly! However, though a winter and a summer are similar, for example, in regular alternation of day and night, you cannot think of saying that winter and summer are the same thing, can you? Nearly the same things are with reverberator and spiral waves; and therefore they should not be confused. It is useful also to keep in mind that it is known now, in addition to the rotating-wave, quite a number of other autowave solutions, and every year the number grows continuously with increasing speed. Because of these causes (or as a result of these events), it was found during the 21st century that many of the conclusions about the properties of autowaves, - which were widely known among readers of the early papers on the subject as well as widely discussed in the press of that time, - unfortunately, proved to be a sort of erroneous hasty generalizations. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Autowave reverberator」の詳細全文を読む スポンサード リンク
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