Period-doubling bifurcation in semiconductor superlattice under the influence of the titled magnetic field
Period-doubling bifurcation in semiconductor superlattice under the influence of the titled magnetic field
А.G. Balanov$^2$, А.А. Koronovskii$^{1,3}$, О.I. Moskalenko$^{1,3}$, А.О. Selskii$^{1,3}$, А.Е. Hramov$^{1,3}$
The semiconductor superlattice is the composite nanostructure used for the generation and the control of the high-frequency oscillations. At present time, attention of the researchers is attracted to the nonlinear dynamics of the electron domains at present nanostructures. In this paper the period-doubling bifurcation phenomena in the semiconductor superlattice under the influence of the titled magnetic field for different temperatures is described.
Show AbstractMethod of optical registration of acoustic field in liquids
Method of optical registration of acoustic field in liquids
L.I. Gilfanova$^{1}$ , S.A. Tsysar$^1$ , P.V. Yuldashev$^1$, V.D. Svet$^2$
The main aim is to develop a method for calculating the structure of the wave field in a heterogeneous medium of skull bone. Phantoms of cranial bones were created and measurement techniques of their acoustic parameters were developed. Principal ultrasonic reconstruction of the real skull bone profile was accomplished.
Show AbstractThe quantum analog of zeta-function and spector of masses for the alternating zeta-function field theory
The quantum analog of zeta-function and spector of masses for the alternating zeta-function field theory
A.O. Shishanin
In the present work we consider the quantum analogue of Riemann’s zeta-function and its alternating version. Formulas for representation of zeta-functions in the form of a functional series and values in the negative integral points are given. For classical limit are obtained known results. We consider field theory for kinetic term with quantum alternating zeta-function and discuss mass spectrum here.
Show AbstractOn the Rutherford--Bohr model of the atom
On the Rutherford--Bohr model of the atom
A.V. Borisov
We give a detailed analysis of two fundamental papers by E. Rutherford (1911) and N. Bohr (1913) where basics of the theory of atomic structure and spectra were developed. We show what influence these works exerted on the development of modern physics.
Show AbstractMaslov Complex Germ Method for Scalar Electrodynamics
Maslov Complex Germ Method for Scalar Electrodynamics
O.Yu. Shvedov
The main notions of semiclassical scalar electrodynamics are discussed. Different approaches for quantizing scalar electrodynamics are considered. These are Couloumb gauge quantization, refined algebraic quantization and Gupta-Bleuler (or BRST-BFV) quantization. In the semiclassical theory, set of all semiclassical states are viewed as a bundle. The base of the bundle is considered as an extended phase space of the corresponding classical theory. Fibres are quantum states in external background. Semiclassical observables are expressed via differential 1-forms on the extended phase space.
Show AbstractTwo-proton radioactivity
Two-proton radioactivity
Ishkhanov B. S.
Two-proton radioactivity was predicted for even-Z nuclei for which due to the pairing force one proton emission is energetically forbidden. The two-proton emission is essentially governed by the Coulomb and centrifugal barriers. Two-proton radioactivity is sensitive to nuclear structure and emission process itself. A model which treats the emission dynamics reasonably well is the three-body model.
Show AbstractUnfolding of anisotropic flow parameters in event-by-event analysis of heavy ion collisions
Unfolding of anisotropic flow parameters in event-by-event analysis of heavy ion collisions
E.N. Nazarova
In this review a new method of studying event-by-event distributions of azimuthal anizotropy of particles in heavy ion collisions introduced by ATLAS collaboration is discussed, as well as the analysis of distributions obtained by the method of approximation to true event-by-event distributions (Unfolding method). It is shown, that considered method of analysis is an effective tool for studying anizotropic flow fluctuations
Show AbstractConstructive fractals in models of the spatial distribution of nanoparticles
Constructive fractals in models of the spatial distribution of nanoparticles
M.V. Kovalchuk, P.V. Korolenko, Yu. V. Ryzhikova
The procedure for constructing two-dimensional aperiodic constructive fractals and their classification are considered. The analysis of the experimental data indicates that the nanoparticle system in liquids, gases and on flat substrates can be characterized as spatially separated distribution of the particles and the presence of aggregate formation. Simulation of the nanoparticle distribution showed that even externally disordered nanoparticle systems without structural self-similarity can generate fractal diffraction patterns. The possibility to identify the various nanoparticle systems based on the definition of the scaling parameters as in diffraction patterns and within the objects is analyzed.
Show AbstractInfluence of structural phase transitions on the elastic properties of unconsolidated granular medium
Influence of structural phase transitions on the elastic properties of unconsolidated granular medium
N.V. Shirgina, A.I. Kokshayskiy, A.I. Korobov
The paper presents the results of investigations of the elastic properties of unconsolidated granular medium (GUM) when the structural phase transitions under the influence of external static effects appear. As a model of the media we used a system of metal balls with a diameter of 2 mm and 4 mm. We experimentally observed anomalous behavior of nonlinear elastic parameters under the influence of changing of external static pressure, which in turn causes structural phase transition in the system. The emergence of a structural phase transition in the sample was independently confirmed by measuring the electrical resistance of the system according to the external static force. The analysis of the results was based on the Hertz theory.
Show AbstractWEB Information Search Systems and information support for acoustics
WEB Information Search Systems and information support for acoustics
V.G. Shamaev, A.B. Gorshkov, L.G. Gushchina, V.I. Yakimenko
We address the problem of retrieval of Russian scientific papers in the Web. The absence of these papers in foreign databases leads to their loss to the scientific community. In this connection, attention is drawn to the Russian-language information search system (ISS) – Scientific Electronic Library (http://elibrary.ru/), portal MathNet (http://www.mathnet.ru/). The Russian-language part of the database VINITI (http: / /www2.viniti.ru/) is criticized. We briefly describe our «Information System „Acoustic“. Russian-language sources» (http://akdata.ru/). The system contents nearly 30000 papers covering 300 periodicals from Russia and CIS countries, as well as books and conference proceedings. Particular attention is paid to the full-text archives of «Uspekhi Fizicheskikh Nauk» (http://ufn.ru/) and «Akusticheskij Zhurnal» (http://www.akzh.ru/), as well as the site of «Current Contents. Acoustics» (http: //akinfo.ru/).
Show Abstract