"' Thermal ellipsoids "', more formally termed "'atomic displacement parameters "', are ellipsoids used in crystallography to indicate the magnitudes and directions of the thermal vibration of atoms in crystal structures.
12.
This is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal.
13.
The three principal axes of the thermal vibration of an atom are denoted U _ 1, U _ 2, and U _ 3, and the corresponding thermal ellipsoid is based on these axes.
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To circumvent these limitations new infrastructures are necessary : an underground site for the detector, to limit the effect of the seismic noise, and cryogenic facilities to cool down the mirrors to directly reduce the thermal vibration of the test masses.
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Somewhere in the range there is a quantum step that makes the difference between tornado or no tornado . ( This argument has to assume that thermal vibrations are deterministic . ) talk ) 12 : 30, 2 April 2011 ( UTC)
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Wideband noise comes from many natural sources, such as the thermal vibrations of atoms in conductors ( referred to as thermal noise or Johnson-Nyquist noise ), shot noise, black body radiation from the earth and other warm objects, and from celestial sources such as the Sun.
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As this instrument's name suggests, its arms are only 600 meters long, but it has about the same sensitivity as LIGO because it incorporates more modern technology, such as fused-silica wires to hang the mirrors ( these reduce heat flow that might induce thermal vibrations ).
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In the study of quantum coherence, the " system " may refer to the microscopic properties of an object ( e . g . the mean of a pendulum bob ), while the relevant " environment " may be the internal degrees of freedom, described classically by the pendulum's thermal vibrations.
19.
Most articles about hydrogen storage in MOFs report hydrogen uptake capacity at a temperature of 77K and a pressure of 1 bar because such condition is commonly available and the binding energy between hydrogen and MOF is large compare to the thermal vibration energy which will allow high hydrogen uptake capacity.