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Its development has been traced to Corning's work in developing photosensitive glass. [2] Corning credits S. Donald Stookey with the discovery of Pyroceram. While conducting research in 1953 on a photosensitive lithium silicate glass called Fotoform containing a dispersion of silver nanoparticles, Stookey noted that an accidentally overheated fragment of the glass resisted breakage when ...
1 clo = 0.155 K·m 2 ·W −1 ≈ 0.88 K·m 2 ·BTU·W −1 ·ft −2 ·°F −1 ·hr −1 R. One clo is the amount of insulation that allows a person at rest to maintain thermal equilibrium in an environment at 21°C (70°F) in a normally ventilated room (0.1 m/s air movement).
From 1914 to mid-1918, the item of underwear most purchased by various military forces was a garment known as a union suit; it is a one-piece form of underwear covering body and legs and was the prototype of the Chinese qiuyi (秋衣), the top part, and qiuku (秋裤), the bottom part. After 1918, countries returned to producing for civilians.
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A thermal column (or thermal) is a rising mass of buoyant air, a convective current in the atmosphere, that transfers heat energy vertically. [1] Thermals are created by the uneven heating of Earth's surface from solar radiation , and are an example of convection , specifically atmospheric convection .
These thermal greases have low electrical conductivity and their volume resistivities are 1.5⋅10 15, 1.8⋅10 11, and 9.9⋅10 9 Ω⋅cm for 860, 8616 and 8617 respectively. The thermal grease 860 is a silicone oil with a Zinc Oxide filler and 8616 and 8617 are synthetic oils with various fillers including Aluminum Oxide and Boron Nitride.
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