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Mikheev N.N.,RAS Shubnikov Institute of Crystallography | Stepovich M.A.,Kaluga State University | Shirokova E.V.,Kaluga State University
Journal of Surface Investigation | Year: 2013

A formula describing the depth dependence of the distribution of the mean energy of a electron beam in a solid target is obtained within the framework of the discrete model of the multiple scattering of charged particles in substances. It is verified whether this formula corresponds to experimental results, and the possibility of using it to solve practical problems of X-ray spectral microanalysis is shown. © 2013 Pleiades Publishing, Ltd.

Kouzakov K.A.,Moscow State University | Popov Y.V.,Moscow State University | Shablov V.L.,Kaluga State University
Physical Review C - Nuclear Physics | Year: 2010

The solutions analytically derived by W. Glöckle, J. Golak, R. Skibiński, and H. Witala [Phys. Rev. C 79, 044003 (2009)] for the three-dimensional wave function and on-shell t matrix in the case of scattering on a sharply cut-off Coulomb potential appear to be fallacious if finite values of a cut-off radius are concerned. And the analysis carried out for an infinite cut-off radius limit is incomplete. © 2010 The American Physical Society.

Kristya V.I.,Kaluga State University | Fisher M.R.,Kaluga State University
Bulletin of the Russian Academy of Sciences: Physics | Year: 2010

Kinetics of electrons, ions and metastable excited atoms in a low-current gas discharge between flat electrodes in the mixture of argon with mercury vapors was simulated. The motion of electrons was calculated using the Monte Carlo method, while that of ions and metastables was described on the basis of their transport equations. The ionization coefficient of the mixture was calculated as a function of relative mercury density. The dependence of discharge ignition voltage on the interelectrode distance was determined. © Allerton Press, Inc., 2010.

Tarasov S.I.,Copenhagen University | Tarasov S.I.,Kaluga State University | Solodovnikov A.Y.,Copenhagen University
Cladistics | Year: 2011

Based largely on homoplastic characters of external morphology, the current systematics of the tribe Onthophagini and allied dung beetle lineages is unstable, contradictory, and thus inefficient. A number of recently proposed molecular phylogenies conflict strongly with each other and with formal classification, and none of them provides new tools for the improvement of dung beetle systematics. We explored the source of these inconsistencies by performing an independent, morphology-based phylogenetic analysis of the "Serrophorus complex", one of the most systematically confusing knots among the onthophagines, that involves 52 species from various genera of Onthophagini and allied tribes. The phylogenetic pattern revealed conflicts with existing classifications and with most of the earlier molecular phylogenies. However, it was largely congruent with the molecular phylogeny (Evolution 2005, 59, 1060), using the largest gene sampling thus far. All current competing phylogenetic hypotheses were evaluated against each other, and the degree of their biogeographic plausibility was used as an additional evaluative criterion. Of the 91 morphological characters involved in our analyses, traits belonging to the endophallic sclerites of the aedeagus had a very strong phylogenetic signal. Terminology of these endophallic characters was established and their morphology was studied in detail, illustrated, and presented as a tool for further practical use. The enormous variety of shapes of the lamella copulatrix within the Onthophagini and allies present a methodological problem in character coding for phylogenetic analyses. Based on the performance of alternative coding approaches, it is argued that a seemingly less informative absence/presence coding scheme would be a better choice. The phylogenetic structure of the Serrophorus complex has been largely resolved, and some taxonomic changes improving its systematics are recommended. © The Willi Hennig Society 2011.

Mikheev N.N.,RAS Shubnikov Institute of Crystallography | Stepovich M.A.,Kaluga State University | Shirokova E.V.,Kaluga State University
Bulletin of the Russian Academy of Sciences: Physics | Year: 2012

The results from using a new distribution function for the depth of characteristic X-ray radiation to calculate the allowance for absorption f(x) in quantitative electron-probe microanalysis are pre- sented. The integral (z) over z in the region of generation is proportional to the normalized absorbed energy value of the electron beam in a sample. This is used to calculate the backscattering factor R. © Allerton Press, Inc., 2012.

Arpentieva (Minigalieva) M.R.,Kaluga State University
Advances in Gerontology | Year: 2015

This article considers the peculiarities of cognitive functions in elderly mentally ill people and types of aging. Relationships between cognitive and personal functions, features of world outlook, and the quality of life in elderly people are analyzed. The paper provides data on features of cognitive processes in elderly patients of a psychiatric clinic, as well as of data on features of cognitive processes and personality in contemporary elderly persons in general. Characteristics (resources) supporting and inhibiting development in old age are discussed. © 2015, Pleiades Publishing, Ltd.

Korovin Y.A.,Kaluga State University | Natalenko A.A.,Kaluga State University | Stankovskiy A.Y.,Advanced Nuclear Systems Institute | Mashnik S.G.,Los Alamos National Laboratory | Konobeyev A.Y.,Association FZK Euratom
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Year: 2010

A proton activation data library for 682 nuclides from 1H to 210Po in the energy range from 150 MeV up to 1 GeV was developed. To calculate proton activation data, the MCNPX 2.6.0 and CASCADE/INPE codes were chosen. Different intranuclear cascade, preequilibrium, and equilibrium nuclear reaction models and their combinations were used. The optimum calculation models have been chosen on the basis of statistical correlations for calculated and experimental proton data taken from the EXFOR library of experimental nuclear data. All the data are written in ENDF-6 format. The library is called HEPAD-2008 (High-Energy Proton Activation Data). A revision of IEAF-2005 neutron activation data library has been performed. A set of nuclides for which the cross-section data can be (and were) updated using more modern and improved models is specified, and the corresponding calculations have been made in the present work. The new version of the library is called IEAF-2009. The HEPAD-2008 and IEAF-2009 are merged to the final HEAD-2009 library. © 2010 Elsevier B.V. All rights reserved.

Tarasov S.I.,Copenhagen University | Tarasov S.I.,Kaluga State University
Zootaxa | Year: 2010

Examination of the type material of the Oriental representatives of the genus Onthophagus Latreille, 1802 (Coleoptera: Scarabaeidae: Scarabaeinae: Onthophagini) deposited at the Natural History Museum in London, National Museum of Natural History in Paris, Museum of Natural History in Basel and National Museum in Prague revealed seven new synonyms. The names synonymized herein were described as separate species mainly for two reasons. The first reason owes to the insufficient knowledge of entire Onthophagus diversity from Oriental Region and the fact that authors describing new species did not check the type material or even original descriptions for already described taxa. The following synonymized species were likely described due to this oversight: O. anamalaiensis Balthasar, 1974; O. chulapornus Masumoto, Ochi & Hanboonong, 2008; O. demaak Masumoto, 1989; O. jucundus Arrow, 1931; O. laosensis Frey, 1971; and O. parvidens Frey, 1971. The second reason is the great range of intraspecific variation of such allometric characters as shape of head, horns and pronotum in Onthophagus. Therefore, detailed examination of the external characters for the large series of specimens, and careful study of male genitalia are required for reliable species identification. Unfortunately, this was not the case for many new species descriptions. In particular, O. perroti Paulian, 1978, was described as a species but actually only represents the minor form of O. orientalis Harold, 1868. The lectotype of O. gracilipes is designated in order to preserve the stability of zoological nomenclature. Copyright © 2010.

Tarasov S.I.,Copenhagen University | Tarasov S.I.,Kaluga State University | Kabakov O.N.,Bassejnaja str. 53 94
Zootaxa | Year: 2010

Two new species of Onthophagus Latreille, 1802 are described from Indochina: O. (Sunenaga) streltsovi sp. n. and O. (Sinonthophagus) nampatensis sp. n. Some problems with the current systematics of Onthophagus, especially with respect to the subgenera Serrophorus, Sunenaga and Macronthophagus are discussed. Copyright © 2010 Magnolia Press.

Seregina E.V.,Kaluga State University | Makarenkov A.M.,Moscow State Technical University | Stepovich M.A.,Kaluga State University
Journal of Surface Investigation | Year: 2012

For a model of the collective motion of minority charge carriers (MCCs) generated by various external energy sources (broad electron and light beams) in a homogeneous semiconductor material, a method for approximating their statistical characteristics (mathematical expectation and autocorrelation function) is described. The developed approach uses the projection method based on application of the theory of matrix operators. It was assumed that a material's electrophysical parameters (MCC lifetime, diffusivity, and surface recombination rate) are random quantities and obey the truncated normal distribution law. A comparative analysis of the dispersion effect of these quantities on the MCC depth distribution is performed. © 2012 Pleiades Publishing, Ltd.

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