Influence of ferroelectric phase transition on Langmuir- Blodgett film adsorption properties
Influence of ferroelectric phase transition on Langmuir- Blodgett film adsorption properties
N.L. Levshin, S.G. Yudin, and А.Р. Diankina
Adsorption isotherms of water molecules and hexane on the surface of polar Langmuir-Blodgett films (VDF/TrFE} have been obtained bу the method of piezoresonance quartz balance at several measurement temperatures. The ferroelectric phase transition of the first kind in the film was found to influence the adsorption capacity of the adsorbent.
Show AbstractOscillatory disintegration of small-amplitude magnetohydrodynamic shock waves
Oscillatory disintegration of small-amplitude magnetohydrodynamic shock waves
S.A. Markovskii
А new scenario of time evolution of small-amplitude trans-Alfvenic shock waves is suggested. The scenario is the oscillatory disintegration, i.e., the mutually reversible transformation into an Alfven discontinuity. Simultaneously, shock and self-similar waves are emitted and contact discontinuities occur. Thus, а nonevolutionary shock wave cannot exist as а steady flow.
Show AbstractInfluence of polarization potential on probaЬilities of free-free electron transitions
Influence of polarization potential on probaЬilities of free-free electron transitions
N.Yu. Dobrolyubov, V.D. Kukin, and V.S. Rostovskii
А method for evaluating the matrix element of an electric dipole transition between the states of the continuous spectrum with regard to the existence of an atom of Coulomb and polarization potentials in the exterior region has been considered. Recurrent formulas for evaluating the contribution of the integral over the domain outside the atom to the matrix element with the use of the values of the radial wave functions and their first derivatives on the boundary have been obtained.
Show AbstractRelation for nonlocality parameters of gluon and four-quark condensates of QCD from finiteenergy sum rules
Relation for nonlocality parameters of gluon and four-quark condensates of QCD from finiteenergy sum rules
D.V. Meshcheryakov and V.B. Tverskoi
In the framework of the finite-energy sum rules method а relation has been obtained for the nonlocality parameters of the four-quark and gluon condensates of QCD.
Show AbstractNeutrino pair production bу virtual photon in external magnetic field
Neutrino pair production bу virtual photon in external magnetic field
V.Ch. Zhukovskii, А.Е. Grigoruk, K.G. Levchenko, and Р.А. Eminov
Production of а massive neutrino-antineutrino pair bу а virtual polarized photon in the Weinberg-Salam model with mixing has been studied. The rate of the neutrino pair production bу photons with various polarizations at values of the magnetic field strength lower than critical has been found.
Show AbstractOn magnetic moment of Cr^{3+} ion in ferrites-chromites with spinel structure
On magnetic moment of Cr^{3+} ion in ferrites-chromites with spinel structure
A.N. Goryaga, L.G. Antoshina, and E.N. Kukudzhanova
The behaviour ofthe paramagnetic susceptibllity ofa series offerrites-chromites samples with а high content of Cr$^{3+}$ ions has been studied. The experimental value of the Curie-Weiss constant has been found to bе much smaller than the theoretical one on the basis of the obtained results and making use of the results of NMR study in the compound MgO with an admixture of Cr$^{3+}$ ions. For the first time the authors have made а proposal that the understated values of the experimental magnetic moments of ferrites-chromites with а high content of chromium ions may also bе due, together with other reasons, to а decrease in the magnetic moment of Cr$^{3+}$ $({t^3}_{2g},{e^0}_g)$ ions because of the transfer of the spin density from О$^{2-}$ ions to the vacant eg-orbltals of Cr$^{3+}$ ions.
Show Abstract1.Foundations of possiЬility theory. Methods of optimal estimation and decision making 2. Measure of necessity: definition, properties, integration over possiЬility and necessity
1.Foundations of possiЬility theory. Methods of optimal estimation and decision making 2. Measure of necessity: definition, properties, integration over possiЬility and necessity
Yu.P. Pyt'ev
Concepts of possibility and necessity of an event, fuzzy one included, as well as concepts of integrating over possibllity and necessity have been considered.
Show AbstractOn а mathematical model of immunology
On а mathematical model of immunology
O.S. Vasiliev, V.B. Glasko, Yu.V. Glasko,V.M. Zemskov, and S.V. Rodionov
А mathematical model for the process of activating immunocompetent cells has been proposed. An inverse proЬlem of identifying а model of an object based on the readings of the flowing cytometer has been posed and its correctness has been estaЫished. А mathematical experiment has been conducted.
Show AbstractPropagation of weakly nonlinear plasma waves in periodically inhomogeneous structures
Propagation of weakly nonlinear plasma waves in periodically inhomogeneous structures
I.М. Aleshin
The effect of periodic inhomogeneity of а positive background on the dynamics of nonlinear potential waves in а cold plasma has been considered in а cuЬic approximation with respect to the field amplitude. Such an inhomogeneity results in splitting of the spectrum of the Langmuir wave into two branches, one of which appears to Ье damped. Medium inhomogeneity also results in а nonlinear frequency shift.
Show AbstractOn mechanism of formation of energy spectrum of cosmic ray protons
On mechanism of formation of energy spectrum of cosmic ray protons
Yu.A. Popov, S.N. Sidorenko, А.Р. Chernyaev, and Lissuk Daniel
Рассмотрен статистический механизм ускорения до релятивистских энергий протонов космических лучей. Найдено решение общего уравнения, описывающего процесс ускорения. Получен энергетический спектр протонов, соответствующий наблюдаемому.
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