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from article Lawson criterion

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Typical plot of minimum value of nτ necessary for net release of energy versus ion kinetic temperature in a mixture containing equal amounts of deuterium and tritium. (After J. M. Hollander, ed., Annu. Rev. Energy, 1:213–255, 1976)

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from article Communications satellite

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Artist impression of TDRS-L, the 11th member of NASA's Tracking and Data Relay Satellite System, orbiting Earth at 36,000 km (22,300 mi). TDRS-L sends signals, information, and commands from ground controllers to the International Space Station and…

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from article Communications satellite

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Typical communications satellite. TWTA = traveling-wave–tube amplifier. (Credit: Space Systems/Loral)

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from article Polymer composite

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Relation between stiffness and filler type and orientation in polymeric materials. L/D = length/diameter of fiber.

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from article Polymer composite

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Load transfer from matrix to fiber in a composite. LC = critical length. σma = matrix stress.

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from article Polymer composite

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Unidirectional continuous fiber–reinforced laminated structure. L = longitudinal direction. T = transverse direction.

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from article Polymer composite

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Measured and predicted elastic modulus in a unidirectional fiber–reinforced laminate as a function of angle between the loading and fiber direction.

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