Results 1 - 10 of 22047
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[en] Highlights: • A 15-element thermodynamic database (TCHEA1) was developed especially for HEAs. • It has 105 binaries, 200 ternaries, and almost all phases in each assessed system. • The development faces new challenges, especially the daunting number of ternaries. • It needs reliable extrapolations into metastable regions and higher order systems. • Examples are made for performing relevant calculations and interpreting the results.
[en] Highlights: • Near equi-atomic alloys containing an icosahedral phase were fabricated. • Prototypical data of high-entropy quasicrystalline alloy (HE-QCs) were achieved. • A way to produce high-entropy alloy with a single quasicrystalline phase was discussed.
[en] We give bounds for the fluctuations of estimators of the mean entropy production in Gibbsian sources. These bounds are valid for every n, where n denotes the size-length of the sample. We consider two estimators which are based on waiting and hitting times. (paper)
[en] For symbolic dynamical systems we use the Carathéodory construction as described in (Pesin 1997 Dimension Theory in Dynamical Systems, ConTemporary Views and Applications (Chicago: University of Chicago Press)) to introduce the notions of q-topological and q-metric entropies. We describe some basic properties of these entropies and in particular, discuss relations between q-metric entropy and local metric entropy. Both q-topological and q-metric entropies are new invariants respectively under homeomorphisms and metric isomorphisms of dynamical systems. (paper)
[en] There have been a number of forms of a conjecture that there is a universal lower bound on the ratio, η/s, of the shear viscosity, η, to entropy density, s, with several different domains of validity. We examine the various forms of the conjecture. We argue that a number of variants of the conjecture are not viable due to the existence of theoretically consistent counterexamples. We also note that much of the evidence in favor of a bound does not apply to the variants which have not yet been ruled out
[en] With entropic interpretation of gravity proposed by Verlinde, we obtain the Friedmann equation of the Friedmann-Robertson-Walker universe for the deformed Horava-Lifshitz gravity. It is shown that, when the parameter of Horava-Lifshitz gravity ω → ∞, the modified Friedmann equation will go back to the one in Einstein gravity. This results may imply that the entropic interpretation of gravity is effective for the deformed Horava-Lifshitz gravity. (general)