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helium expansion engine

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  • Stirling engine — Alpha type Stirling engine. There are two cylinders. The expansion cylinder (red) is maintained at a high temperature while the compression cylinder (blue) is cooled. The passage between the two cylinders contains the regenerator …   Wikipedia

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  • Stoddard engine — Elliott J. Stoddard invented and patented two versions of the Stoddard engine, the first in 1919 and the second in 1933. The general engine classification is an external combustion engine with valves and single phase gaseous working fluid (i.e. a …   Wikipedia

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  • Samuel Collins (American physicist) — Samuel Cornette Collins (born September 28, 1898 in Kentucky, died June 19, 1984 in Washington, DC. [cite web|title=MIT website|url=http://web.mit.edu/hmtl/www/collins.html|accessdate = February 2008] ) developed the first mass produced helium… …   Wikipedia

  • Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

  • Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

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