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Zarakovsky G.M.,All Russia Research Institute of Technical Physics
Human Physiology | Year: 2014

The article is aimed at further developing V.I. Medvedev’s ideas about the specific character of human adaptation processes described in his monograph Adaptatsiya cheloveka (Human Adaptation) (St. Petersburg: Institute of the Human Brain of the Russian Academy of Sciences, 2003). The key point is the statement that “human adaptation is a process ensuring the attainment of a particular objective.” The article elucidates and develops this statement on the basis of a cross-disciplinary approach to the problem of adaptation (including biological, psychological, and social adaptation) and the results of a number of empirical researches. © 2014, Pleiades Publishing, Inc. Source

Baidakov V.G.,RAS Institute of Thermal Physics | Tipeev A.O.,RAS Institute of Thermal Physics | Bobrov K.S.,RAS Institute of Thermal Physics | Ionov G.V.,All Russia Research Institute of Technical Physics
Journal of Chemical Physics | Year: 2010

We present the results of molecular dynamics simulations of the crystal nucleation rate in a supercooled Lennard-Jones liquid. The nucleation rate as a function of the pressure has been calculated by the method of determining the expectation time for liquid crystallization at temperatures higher than that of the triple point (T =0.865), close to the temperature of the terminal critical point of the metastable extension of the melting curve (T =0.55) and below this temperature (T =0.4). In computer experiments the nucleation rate varied from 1032 to 1035 s-1 m-3. The dimensions of critical nuclei and the pressure inside them, the surface free energy at a critical crystal nucleus-liquid interface, the height of the nucleation barrier, and the Zeldovich factor have been determined from the results of molecular dynamics simulations and their comparison with classical homogeneous nucleation theory. It is shown that the surface free energy at a curved crystal-liquid interface, as distinct from a flat interface, has also been determined at temperatures lower than the temperature of the terminal critical point of the melting curve and is a monotonically increasing function of the temperature. © 2010 American Institute of Physics. Source

Zav'yalov V.V.,All Russia Research Institute of Technical Physics
Atomic Energy | Year: 2015

The application of the Gauss–Seidel diagonal element isolation method is examined for obtaining an iterative solution of the system of thermal-radiation transfer equations for absorbing, radiating, and scattering media. Calculations of a test problem are preformed for the example of the correction form of the nonlinear variant of the method for the finite-difference WDD scheme in planar geometry. The method can also be used for modeling the transfer of γ-rays and neutrons. © 2014, Springer Science+Business Media New York. Source

Arapov Y.D.,All Russia Research Institute of Technical Physics | Dyakov V.A.,Moscow State University | Grechin S.G.,Moscow State Technical University | Kasyanov I.V.,All Russia Research Institute of Technical Physics
Laser Physics Letters | Year: 2014

The influence of the thermal deformation process on frequency conversion in an LBO crystal is considered. The different temperature bandwidths at the harmonic generation of YAG:Nd laser radiation were obtained experimentally three times at different types of crystal fixation. © 2014 Astro Ltd. Source

McGuffey C.,University of Michigan | Thomas A.G.R.,University of Michigan | Schumaker W.,University of Michigan | Matsuoka T.,University of Michigan | And 9 more authors.
Physical Review Letters | Year: 2010

Experimental studies of electrons produced in a laser wakefield accelerator indicate trapping initiated by ionization of target gas atoms. Targets composed of helium and controlled amounts of various gases were found to increase the beam charge by as much as an order of magnitude compared to pure helium at the same electron density and decrease the beam divergence from 5.1±1.0 to 2.9±0.8mrad. The measurements are supported by particle-in-cell modeling including ionization. This mechanism should allow generation of electron beams with lower emittance and higher charge than in preionized gas. © 2010 The American Physical Society. Source

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