About a structure of exponential monomials on some locally compact abelian groups. О структуре экспоненциальных мономов на некоторых локально компактных абелевых группах

Получено описание некоторого класса экспоненциальных мономов на локально компактных абелевых группах.We describe the structure of some class of exponential monomials onsome locally compact abelian groups. The main result of the paper is the next theorem.Let G* and G be locally compact abelian groups, a : G* -> G be acontinuous surjective homomorphism and H be a kernel of a. If a is aan open maps from G* to G then any exponential monomial Ф(t) on thegroup G*, which satisfy the condition Ф(t + h) = Ф(t) for all h in H; t in G* can be presented in the form Ф(t) = f(a(t)) for some exponential monomial f(x) on the group G

Covariant theory of particle-vibrational coupling and its effect on the single-particle spectrum

The Relativistic Mean Field (RMF) approach describing the motion of independent particles in effective meson fields is extended by a microscopic theory of particle vibrational coupling. It leads to an energy dependence of the relativistic mass operator in the Dyson equation for the single-particle propagator. This equation is solved in the shell-model of Dirac states. As a result of the dynamics of particle-vibrational coupling we observe a noticeable increase of the level density near the Fermi surface. The shifts of the single-particle levels in the odd nuclei surrounding 208-Pb and the corresponding distributions of the single-particle strength are discussed and compared with experimental data.Comment: 27 pages, 8 figure

Change in blood glucose level in rats after immobilization

Experiments were carried out on male white rats divided into four groups. In group one the blood glucose level was determined immediately after immobilization. In the other three groups, two hours following immobilization, the blood glucose level was determined every 20 minutes for 3 hours 40 minutes by the glucose oxidase method. Preliminary immobilization for 2 hours removed the increase in the blood glucose caused by the stress reaction. By the 2nd hour of immobilization in the presence of continuing stress, the blood glucose level stabilized and varied within 42 + or - 5.5 and 47 + or - 8.1 mg %. Within 2 hours after the immobilization, the differences in the blood glucose level of the rats from the control groups were statistically insignificant

Anomalous in-plane magneto-optical anisotropy of self-assembled quantum dots

We report on a complex nontrivial behavior of the optical anisotropy of quantum dots that is induced by a magnetic field in the plane of the sample. We find that the optical axis either rotates in the opposite direction to that of the magnetic field or remains fixed to a given crystalline direction. A theoretical analysis based on the exciton pseudospin Hamiltonian unambiguously demonstrates that these effects are induced by isotropic and anisotropic contributions to the heavy-hole Zeeman term, respectively. The latter is shown to be compensated by a built-in uniaxial anisotropy in a magnetic field B_c = 0.4 T, resulting in an optical response typical for symmetric quantum dots.Comment: 5 pages, 3 figure

Quantum-dot-based optical polarization conversion

We report circular-to-linear and linear-to-circular conversion of optical polarization by semiconductor quantum dots. The polarization conversion occurs under continuous wave excitation in absence of any magnetic field. The effect originates from quantum interference of linearly and circularly polarized photon states, induced by the natural anisotropic shape of the self assembled dots. The behavior can be qualitatively explained in terms of a pseudospin formalism.Comment: 5 pages, 3 figures; a reference adde

Economic aspects of organizing high-technology resource saving production in the forest sector of Russia

Purpose: The article aims at assessing the possibility of organizing high-tech production in the Russian forest industry. Structure/Methodology/Approach: To switch to high-tech and resource-saving technologies in the production of sleepers, it is necessary to assess the influence of a few factors: the cost of production of innovative products, the demand for innovative products, the lifetime of innovative products. To assess the demand, we have used an expert survey. Results: The cost of producing railroad sleepers from modified wood has been established. The use of cheaper softwood wood as raw material (birch, aspen, alder, poplar, etc.) which makes it possible to reduce the cost of production of the sleepers is a competitive advantage of the innovative technology. Practical implications: It has been established that in the future we should expect an increase in demand for the sleepers made of modified wood, especially in the European part of Russia. Originality/Value. The main contribution of this study is the rationale for the transition to the concept of environmental savings in the Russian forest industry. The use of modified wood in the production of sleepers is economically viable and can be an alternative when diversifying production.peer-reviewe

Self-consistent calculations of quadrupole moments of the first 2+ states in Sn and Pb isotopes

A method of calculating static moments of excited states and transitions between excited states is formulated for non-magic nuclei within the Green function formalism. For these characteristics, it leads to a noticeable difference from the standard QRPA approach. Quadrupole moments of the first 2+ states in Sn and Pb isotopes are calculated using the self-consistent TFFS based on the Energy Density Functional by Fayans et al. with the set of parameters DF3-a fixed previously. A reasonable agreement with available experimental data is obtained.Comment: 5 pages, 6 figure