Effective viscosity of confined hydrocarbons

We present molecular dynamics friction calculations for confined hydrocarbon films with molecular lengths from 20 to 1400 carbon atoms. We find that the logarithm of the effective viscosity η(eff) for nanometer-thin films depends linearly on the logarithm of the shear rate: log η(eff)=C-nlog ?γ, where n varies from 1 (solidlike friction) at very low temperatures to 0 (Newtonian liquid) at very high temperatures, following an inverse sigmoidal curve. Only the shortest chain molecules melt, whereas the longer ones only show a softening in the studied temperature interval 0相似文献   

Special features of detectors, electronics, and trigger system of the ALICE setup

Special features and parameters of detectors, front-end electronics, and trigger electronics of the ALICE setup, which is intended for investigations of ultrarelativistic nucleon-nucleon collisions at the LHC and for studies of heavy ion collisions, starting from protons to several types of ions, which have 5.5 TeV/nucleon energy in the center of mass, are described. One of the first collisions of lead ions was recorded by the ALICE detector on November 8, 2010.     

Effects of Focusing for Atoms Sputtered from a Ni (001) Face with Angle and Energy Resolution

The focusing and overfocusing of atoms sputtered from Ni (001) face are studied with the use of molecular dynamics computer simulations. When a crystal transitions from the paramagnetic to the ferromagnetic state, there is a reduction in the number of focused and overfocused sputtered atoms. The evolution of distributions of sputtered atoms with the simultaneous energy and polar angle resolution due to changes in the azimuthal angle and binding energy of atoms at a surface is studied.     

Result of the Neutrino-4 Experiment and the Cosmological Constraints on the Sterile Neutrino (Brief Review)

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Catalytic Hydrogenolysis of Solketal on Bifunctional Catalysts with Production of High Octane Components of Motor Fuels

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Experimental verification of the dual unitarization scheme

The connection between particle production in antiproton-proton annihilation and non-diffractive proton-proton processes is discussed in the framework of the dual unitarization scheme. We calculate relative multiplicity moments for antiproton-proton annihilation using the moments of non-diffractive proton-proton interactions and find good agreement with experimental annihilation data.     

Qualitative analysis of the formation of T-domains under the condition of the existence of a single R-reference system

We examine the origination of a T-domain in a spherically symmetric configuration. The following assertion is proved: If a single R-reference system can be introduced in the whole connected R-domain, where each remote observer can determine an arbitrarily large interval of coordinate R-time, then the boundary between the R-and T-domains (the R-T boundary) is formed by isotropic world lines. Certain characteristic features of the solution describing the origination of a T-domain can hence be mentioned, namely: There are throats in the T-domain; in the R-neighborhood of a definite part of the R-T boundary the reference system applicable in the whole space-time domain under consideration is broadened; the R-T boundary is a surface on which the time R-coordinate takes on an infinitely large value in the limit.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 15–18, May, 1981.