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Matrioshka brain
A matrioshka brain is a hypothetical megastructure proposed by Robert Bradbury, based on the Dyson sphere, of immense computational capacity. It is an example of a ''Class B stellar engine'', employing the entire energy output of a star to drive computer systems.
This concept derives its name from Russian Matrioshka dolls.〔(【引用サイトリンク】title=Matrioshka Brains – Some Intermediate Stages in the Evolution of Life )〕
The concept was deployed by its inventor, Robert Bradbury, in the anthology ''Year Million: Science at the Far Edge of Knowledge'', and attracted interest from reviewers in the ''Los Angeles Times'' and the ''Wall Street Journal''.
==Concept==
The term "matrioshka brain" was invented by Robert Bradbury as an alternative to the "Jupiter brain"—a concept similar to the matrioshka brain, but on a smaller planetary scale and optimized for minimum signal propagation delay. A matrioshka brain design is concentrated on sheer capacity and the maximum amount of energy extracted from its source star, while a Jupiter brain is more optimized for computational speed.〔(【引用サイトリンク】title=Jupiter & Matrioshka Brains: History & References )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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