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The molar gas constant (also known as the gas constant, universal gas constant, or ideal gas constant) is denoted by the symbol R or R. It is the molar equivalent to the Boltzmann constant, expressed in units of energy per temperature increment per amount of substance, i.e. the pressure–volume product, rather than energy per temperature ...
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The electronic properties of graphene. A. H. Castro Neto, F. Guinea, N. M. R. Peres, K. S. Novoselov, A. K. Geim. This article reviews the basic theoretical aspects of graphene, a one atom thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. The Dirac electrons can be controlled by application of external ...
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R is a measure of thermal resistance for the thickness of material concerned (for the example you gave 70mm, or 0.07m). Resistance = resistivity * thickness. So 0.037 W/mK = (1 / 0.037) * 0.07 = 1.89 which is close to the R value quoted for the second example you gave. So to convert from W/mK to R, take the inverse and multiply by the …
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Dr. Kelly Dorgan joined the faculty at Dauphin Island Sea Lab in the fall of 2013. Dr. Dorgan is particularly interested in how benthic microalgae and bacteria alter sediment habitats for larger organisms and in developing new methods to measure sediment properties on the small scales of burrowing animals. Potential projects in her lab include ...
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Films that were about 19 nm thick, etched with NH 4 HF 2, transmit ∼90% of the light in the visible-to-infrared range and exhibit metallic conductivity down to ∼100 K. Below 100 K, the films' resistivity increases with decreasing temperature and they exhibit negative magnetoresistance-both observations consistent with a weak localization ...
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