300 research outputs found
Regional population expenditure for foodstuffs in the Russian Federation: componential and cluster analyses
The article describes the solving of the problem of conducting the component and cluster analyses of population expenditure on food as one of the most important components of the standard of living. The purpose of the analysis is to develop the regional clusters of the Russian Federation, which vary in the structure of household expenditure for foodstuffs. The foodstuffs are presented in absolute units taking into integral account the standard of living index. The methods of intellectual analysis such as component and cluster analyses are applied as the research methods. The procedure for the data intellectual analysis based on the interconnected performance of component and cluster analyses is proposed. The procedure of the data intellectual analysis considers the interrelation between the results received by different methods, and also the possibility to return to the previous method for the purpose of repeating the analysis to specify consistently the clusters composition. Few clusters of the wealthy regions characterized by the high and average levels of expenditure for foodstuffs are revealed as well as the quite many clusters of not enough wealthy and not wealthy regions characterized by the low level of expenditure for foodstuffs. It is shown that the growth of standard of living characterized by the size of a gross regional product per capita is followed by the growth of the Gini coefficient, which indicates both the inequality of income distribution and reduction in expenditure for low-value foodstuffs. The results of the analysis can be applied to the development of the decision-making support system intended for the analysis of the scenarios of macroeconomic regulation in the eld of income policy for the purpose of increasing the standard of living of population. The analysis of the population expenditure for foodstuffs has allowed to reveal the cluster structure of the regions of the Russian Federation, to show it according to the generalized indications, to formulate the specific characteristics of the clusters of the regions and important management decisions
Structure stability in the simple element sodium under pressure
The simple alkali metal Na, that crystallizes in a body-centred cubic
structure at ambient pressure, exhibits a wealth of complex phases at extreme
conditions as found by experimental studies. The analysis of the mechanism of
stabilization of some of these phases, namely, the low-temperature Sm-type
phase and the high-pressure cI16 and oP8 phases, shows that they satisfy the
criteria for the Hume-Rothery mechanism. These phases appear to be stabilized
due to a formation of numerous planes in a Brillouin-Jones zone in the vicinity
of the Fermi sphere of Na, which leads to the reduction of the overall
electronic energy. For the oP8 phase, this mechanism seems to be working if one
assumes that Na becomes divalent metal at this density. The oP8 phase of Na is
analysed in comparison with the MnP-type oP8 phases known in binary compounds,
as well as in relation to the hP4 structure of the NiAs-type
Simple Metals at High Pressure
In this lecture we review high-pressure phase transition sequences exhibited
by simple elements, looking at the examples of the main group I, II, IV, V, and
VI elements. General trends are established by analyzing the changes in
coordination number on compression. Experimentally found phase transitions and
crystal structures are discussed with a brief description of the present
theoretical picture.Comment: 22 pages, 4 figures, lecture notes for the lecture given at the Erice
course on High-Pressure Crystallography in June 2009, Sicily, Ital
Evidence of local superconductivity in granular Bi nanowires fabricated by electrodeposition
An unusual enhancement of resistance (i.e., superresistivity) below a certain
characteristic temperature Tsr was observed in granular Bi nanowires. This
superresistive state was found to be dependent on the applied magnetic field
(H) as well as the excitation current (I). The suppression of Tsr by magnetic
field resembles that of a superconductor. The observed superresistivity appears
to be related to the nucleation of local superconductivity inside the granular
nanowire without long-range phase coherence. The phenomenon is reminiscent of
the Bose-insulator observed previously in ultra thin two-dimensional (2D)
superconducting films and 3D percolative superconducting films.Comment: 11 pages, 5 figures. submitted to PR
The Spin of the Nucleon in the Semi-inclusive DIS with Charged Current
The investigation of spin structure of the nucleon is one of the actual
problems of particle physics [1]. According to recent experimental data
[2]—[5]the quarks are responsible for 33-35% of nucleon spin and the strange
quarks contribution is near to zero ∆s ~ 0.1 The nucleon spin problem
requires the further experimental research of all contributions. In present
work the possibilities of determination of the quark contributions to the
nucleon spin based on observable asymmetries of the semi-inclusive deep
inelastic scattering (SIDIS) with the charged current are considered
The Quark Contributions to the Nucleon Spin from Semi-inclusive lp- DIS with Charged Current
Current paper considers the possibilities to determine quark contributions based on observable values - polarization asymmetries of semi-inclusive LN - DIS. Numerical computations of asymmetries
are provided
The Polarized Semi-inclusive Lepton-Nucleon DIS with Charged Current
This paper discusses the polarization asymmetry of semi-inclusive deep inelastic scattering of leptons on nucleons. Numerical results of asymmetries and radiative corrections to lepton current are provided
The Spin Structure of the Nucleon from Semi-Inclusive Deep Inelastic Neutrino Scattering with Neutral Current
The asymmetries of semi-inclusive deep inelastic scattering of neutrino on polarized deuteron with the neutral current have been used for the extraction of valence quark, anti-quark and strange quark contributions to the nucleon spin
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