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Vinogradov V.V.,Krasnoyarsk State Pedagogical University
Zoologicheskii Zhurnal | Year: 2011

The fauna and rodent populations were studied in the forest belt of the Sayan and Kuznetski Alatau mountains. A comparative analysis of the composition and organization of their communities was conducted in 10 key sites located in different parts of the region. The differences in the communities were related to those in moisture conditions of their habitats. There were distinguished excessively wet (pergumid), wet (humid) and moderately moist (semihumid) sectors. The leading environmental factors affecting the rodent populations were the following: the eco-coenotic composition of subordinate forest layers, the composition and crown density of forest-forming species, heat and moisture characteristics, and anthropogenic transformation of the territory. Owing to variable effect of these factors on the rodent communities in different sections of the sites, information characteristics (diversity index) differ to a great extent. Source


Ivanov A.A.,Siberian Federal University | Orlov V.A.,Krasnoyarsk State Pedagogical University
Physics of the Solid State | Year: 2011

A comparative analysis of the influence of random fluctuations of the crystallographic anisotropy and surface roughnesses on the pinning of a domain wall in a nanowire has been performed in the framework of the model of a polycrystalline nanowire. The initial magnetization curve and the coercive force for these mechanisms of pinning have been calculated. A criterion has been formulated according to which surface inhomogeneities of the nanowire play the key role in the process of pinning of a domain wall. The analytical results obtained have been verified using computer simulation. © 2011 Pleiades Publishing, Ltd. Source


Ivanov A.A.,Siberian Federal University | Orlov V.A.,Krasnoyarsk State Pedagogical University
Physics of the Solid State | Year: 2011

Magnetostatic interaction in polycrystalline nanowires manifests itself in two competing ways, providing the existence of a stable domain structure even in the absence of exchange interaction between crystals. It has been found that not only the domain structure but also the block magnetization structure of the nanowire consisting of exchange-noninteracting crystallites are of magnetostatic nature. The average domain wall width and magnetization correlation length have been calculated analytically and validated by simulation. The feasibility of the "easy axis" and "easy plane" phases of the effective anisotropy for different crystallite shapes has been demonstrated. © 2011 Pleiades Publishing, Ltd. Source


Ganzha E.I.,Krasnoyarsk State Pedagogical University
Programming and Computer Software | Year: 2012

Algorithms for solving linear PDEs implemented in modern computer algebra systems are usually limited to equations with two independent variables. In this paper, we propose a generalization of the theory of Laplace transformations to second-order partial differential operators in ℝ 3 (and, generally, ℝ n) with a principal symbol decomposable into the product of two linear (with respect to derivatives) factors. We con- sider two algorithms of generalized Laplace transformations and describe classes of operators in ℝ 3 to which these algorithms are applicable. We correct a mistake in [8] and show that Dini-type transformations are in fact generalized Laplace transformations for operators with coefficients in a skew (noncommutative) Ore field. © Pleiades Publishing, Ltd., 2012. Source


Vinogradov V.V.,Krasnoyarsk State Pedagogical University
Contemporary Problems of Ecology | Year: 2012

The dynamics of shrews association in the mountain taiga of the Eastern Sayan was considered during the years 1981 to 2010. The work was carried out in the territory of "Stolby" reserve. The structure of the association, the duration of cyclic changes of different species, effect of succession and climatic processes on the composition and structure of the community have been studied. © 2012 Pleiades Publishing, Ltd. Source

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