Дисперсионная модель рассеяния пиона на фиксированном нуклоне
Дисперсионная модель рассеяния пиона на фиксированном нуклоне
Д.В. Мещеряков
Рассмотрена задача рассеяния псевдоскалярного мезона с орбитальным моментом, pавным единице, на фиксированном нуклоне с орбитальным моментом, pавным единице. Получено решение задачи, обладающее свойствами унитарности и кроссинг-симметрии.
Show AbstractВременной ход интенсивности аномальных космических лучей на орбитах ИСЗ "Космос"
Временной ход интенсивности аномальных космических лучей на орбитах ИСЗ "Космос"
Д.А. Журавлев, М.А. Кондратьева, Ч.А. Третьякова
Измерены величины потоков аномальных космических лучей в течение двух последних периодов минимума солнечной активности. Данные получены с помощью твердотельных трековых детекторов, экспонировавшихся на спутниках серии "Космос".
Show AbstractProblems of nonlinear dynamics: I. Chaos
Problems of nonlinear dynamics: I. Chaos
A.Yu. Loskutov
This is the first part of a review devoted to some present-day problems of nonlinear dynamics, namely, the chaoticity of dynamical systems and the controllability of such systems. Basic bifurcation theory propositions, along with some results concerning the development of chaos in such systems, are presented. Some important properties of chaotic dynamical systems are discussed, methods to describe them are considered, and some ergodic theory propositions are elucidated.
Show AbstractExamples of computations in the framework of a new perturbation theory with convergent series
Examples of computations in the framework of a new perturbation theory with convergent series
V.V. Belokurov, Yu.P. Solov'ev, E.T. Shavgulidze, I.L. Yudin
Within the framework of a new perturbation theory with convergent series, certain quantities determined by finitely many terms of the expansion of the traditional perturbation theory are evaluated. The obtained results are compared with the known exact solutions.
Show AbstractMixed boundary problem of magnetized semiconductor physics in an external domain
Mixed boundary problem of magnetized semiconductor physics in an external domain
A.O. Chikilev, P.A. Krutitskii
The authors consider a mixed problem for the Laplace equation in an external multiply connected domain with a boundary composed of simple closed curves. The Dirichlet condition is preset on some curves and a condition with the skew derivative on the other curves. The problem is reduced to the uniquely solvable Fredholm equation of the second kind in the space of continuous functions. The existence and uniqueness of the solution are proved.
Show AbstractSpectroscopic studies of the aggregation of biscyanine dyes in solutions
Spectroscopic studies of the aggregation of biscyanine dyes in solutions
K.G. Blinova, A.A. Ishchenko, l.L. Mushkalo, S.V. Patsaeva, A.V. Pekhota, V.I. Yuzhakov
Spectral-luminescence properties of four biscyanine dyes that represent chemically combined dimers, as well as those of the corresponding monomeric dyes were studied. Electron absorption and luminescence spectra of aqueous and ethanol solutions of the dyes were measured. Processes of association of monomeric and dimeric dyes caused by solutions strengthtening were studied.
Show AbstractMeasuring the optical characteristics of scattering media from the time profile of optical-acoustic signals
Measuring the optical characteristics of scattering media from the time profile of optical-acoustic signals
P.S. Grashin, A.A. Karabutov, J.M. Pelivanov, N.B. Podymova
To study the relationship between the position of the light intensity maximum in a scattering medium and the ratio between the light absorption and extinction coefficients at various scattering coefficients, an optical-acoustic method is used. Measurements are taken from the time profile of the pressure of an acoustic pulse excited in the medium in a thermal-optical fashion. A method for measuring the light absorption and reduced scattering coefficients of scattering media from the time profile of acoustic signals excited there is suggested.
Show AbstractSelf-phase modulation and optical-harmonic generation in hollow fibers: simple recipes for a high efficiency
Self-phase modulation and optical-harmonic generation in hollow fibers: simple recipes for a high efficiency
A.N. Naumov, O.A. Kolevatova, A.M. Zheltikov
Simple expressions for the estimation of the gas pressure allowing thirdharmonic generation in leaky modes of a hollow fiber to be phase matched and permitting optimal sizes of a hollow fiber for ultrashort-pulse generation to be chosen are derived. The enhancement of harmonic-generation efficiency in a hollow fiber relative to harmonics generation in a free gas is estimated.
Show AbstractCrystal structure parameters of Pd$_{3}$Lu$_{2}$ intermetallide
Crystal structure parameters of Pd$_{3}$Lu$_{2}$ intermetallide
A.S. Ilyushin, N.A. Khatanova, E.A. Rykova, E.V. Silonova
X-ray analysis was used to show that aging of Pd-44.5 at.% Lu and Pd-45.7 at.% Lu alloys at 500$^о$C resulted in the formation of the Pd$_3$Lu$_2$ intermetallide with a monoclinic lattice ($a=7.78$ Å, $b=8.90$ Å, $c=12.21$ Å, $\beta=117^о$). The crystallization of Pd$_3$Lu$_2$ is preceded by the formation of a metastable phase with a berthollide-type hexagonal lattice.
Show AbstractThe role of the density structure of the near-water atmospheric layer in the atmosphere-ocean heat and mass exchange
The role of the density structure of the near-water atmospheric layer in the atmosphere-ocean heat and mass exchange
A.A. Budnikov$^1$, G.G. Khundzhua$^2$
The stability of density stratification of the near-water atmospheric layer (NWAL} is analyzed. The relationship between the instability energy and the hydrometeorological parameters is evaluated. The role of the NWAL density and thermal structures in the atmosphere-ocean heat and mass exchange processes is demonstrated.
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