S. V. Moshkin

S. V. Moshkin
National Library of Russia

PhD

About

42
Publications
1,643
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176
Citations
Introduction
S. V. Moshkin currently works at the Department of Automated Library System, National Library of Russia,Saint Petersburg. His current project is 'Data presentation in qualitative and quantitative composistics as a multidisciplinary research area to address the issues of coding, systematizing composition of objects of any nature and their changes.'.
Additional affiliations
October 1995 - December 2001
Institute of the Earth's Crust
Position
  • Head of laboratory of modeling natural crystallisation processes
February 1993 - December 2001
Saint Petersburg State University
Position
  • Principal Investigator

Publications

Publications (42)
Data
ABSTRACT The catalog includes: Table of RHAT codes and descriptions of objects in alphabetical order, - alphabet - Periodic table of elements. Table of codes for describing objects in the author's order. General Ranks Formulas: chemical composition of meteorites and the compositions of igneous rocks (Bogatikov et al., 1987). Formulas for calculatio...
Article
На базе информационного языка RHA, разработанного для разных типов объек- тов, предлагается систематизировать каркасы начертаний знакотипов "Н" раз- ных шрифтов, с назначением каркасу его кода, посредством помещения знакотипа "Н" в стандартизированное окно (ФонтОкно), и последующим расчётом количест- венных характеристик (характеризаций). Совокупно...
Article
Full-text available
The authors propose to systematize the font frameworks of the ''H'' sign types of different fonts on the base of the RHA information language, which has been developed for different types of objects, by assigning a code to the framework by placing the H font in the standardized window (FontWindow), with the subsequent calculation of quantity charac...
Data
The catalog contains 1083 RHAT codes of mineral compositions of igneous rocks with their descriptions from 30 data sources. Two variants of data ordering were used: 1) the alphabetical one, which is the order of rank formulas in T.G. Petrov and N.I. Krasnova "R-catalog of chemical compositions of minerals, 2010" and 2) the order of sources in the p...
Data
The generalized rank formula * (GRF) chemical compositions of minerals - a table of a special form, which is a convolution of information about the distribution of elements in the collections of rank formulas. "GRF ChC Minerals 2010" is designed to review the frequency of occurrence of elements in minerals and mineraloids in the "R dictionary-catal...
Research
Full-text available
Каталог - первый по масштабу опыт представления составов любой природы с использованием кодирования по методу RHA. Здесь R – ранговая формула, Hn – информационная энтропия К.Шеннона, An – анэнтропия Т.Петрова, все при n=10. Все характеристики использованы для n первых в ранговой формуле элементов. Упорядочение R производится по Периодической Систем...
Article
Full-text available
ABSTRACT: Information language-method RHAT is designed for coding, ordering, and representation of composition changes in objects of any nature. Here R, rank formula of composition, is a rating of components by content decrease, H - C. Shannon information entropy as a measure of composition complexity, A - anentropy as a measure of purity, T-tolera...
Conference Paper
Brief description of RHA(T) information language – system designed for discrete distributions coding, analysis compositions of any nature, their ordering and description of their alternation processes is given. Here, R is rank formula of composition – a sequence of components by reduction of their value (contents); Н is Shannon information entropy...
Article
A method for constructing a two-parameter crystal chemical alphabet for coding crystal chemical formulas (CCFs) for the purpose of their systematization is described. The general principles for coding the crystal chemical formulas are formulated. The two-parameter alphabet is an ordered collection of pairs of symbols in which data on a position and...
Conference Paper
Full-text available
Brief description of RHA(T) information language – system designed for discrete distributions coding, analysis compositions of any nature, their ordering and description of their alternation processes is given. Here, R is rank formula of composition – a sequence of components by reduction of their value (contents); Н is Shannon information entropy...
Article
Full-text available
Предлагается способ построения двупараметрического «кристаллохимичес-кого алфавита» для кодирования кристаллохимических формул (КХФ) с целью их систематизации. Сформулированы общие принципы кодирования кристалло¬химических формул. Двупараметрический алфавит представляет собой упоря¬доченную совокупность пар символов, в которых зафиксированы сведени...
Article
Full-text available
A method for constructing a two�parameter crystal chemical alphabet for coding crystal chemical formulas (CCFs) for the purpose of their systematization is described. The general principles for coding the crystal chemical formulas are formulated. The two�parameter alphabet is an ordered collection of pairs of symbols in which data on a position and...
Article
Full-text available
Объекты изучения геологов, демографов, биоценологов, финансистов и специалистов многих других отраслей знания могут рассматриваться как поликомпонентные объекты или как ценозы.
Article
The orientation, distribution, and density of dislocations in isomorphously mixed potassium-rubidium biphthalate crystals composed of two zones with different concentrations of isomorphous rubidium impurity are experimentally studied. A model for the formation of growth dislocations in the external zone, which compensate internal heterometry-induce...
Article
Full-text available
....большие трудности определения минерального состава мелкозернистых осадков практически не позволяют изучать результаты процессов разделения непосредст¬венно по минеральной составляющей осадка, что было бы методологически более коррект¬но, а вынуждают решать задачу косвенными методами, используя обычно сильное, но, как правило, количественно не о...
Article
Full-text available
Chemical compositions of scapolites in the great amount of collected analyses were scanned with application of several modern techniques. The results allow discussing as some particular, so the general peculiarities of their com¬position. For example, an especial role of sulfur and potassium appears to be revealed. The hierarchic classification of...
Article
The comparative study of the distribution and density of dislocations and cracks in isomorphously mixed potassium-rubidium biphthalate crystals grown under the conditions of discrete and continuous changes of the solution composition with time. The method is developed for calculating the heterometry-induced internal stresses and the character of th...
Article
A thermodynamic model of a quasiequilibrium between the solution and an elastically stressed layer formed during growth of a two-component mixed crystal under nonstationary conditions has been constructed. The derived equations are solved numerically for the system potassium biphtalate-rubidium biphtalate-water. It is shown that the inconsistency b...
Conference Paper
Full-text available
В настоящее время существует две точки зрения на проблему описания изоморфизма в скаполитах. Согласно первой - "классической", разнообразие составов скаполита описывается в рамках двухкомпонентного изоморфного ряда между мариалитом Na4(Al3Si3O24)Cl и менонитом Ca4(Al6Si6O24)CO3 (без учета сильвиалита Ca4(Al6Si6O24)SO4). Вторая, высказанная одним из...
Article
A simple method for sample preparation based on copper oxide Cu2O acting as an oxygen getter is presented, which results in very well-ordered ortho-II phases in both polycrystalline and single-crystal samples of the high Tc superconducting compound YBa2Cu3O6+x (0.48≤x≤0.62). It comes out from our measurements of the superstructure correlation lengt...
Article
Spontaneous crystallization from a solution in a melt at a pressure of (0.8–1)×10−3 Pa was used to obtain single crystals of a new nonperovskite-like superconducting phase Ba2Cu3O6−x space group P ccm, a=13.065, b=20.654, and c=11.431 Å). The superconducting properties of the crystals were investigated by modulated microwave absorption. The superco...
Article
The crystals with a continuous change in lattice constants (delta-crystals) can be used in X-ray optics since they are able to change the divergence of X-ray beam. The samples of linear (one-dimensional) delta-crystals of potassium-rubidium biphthalate with the gradient of lattice constant b up to 1%/cm have been grown from low-temperature aqueous...
Article
A synchrotron-radiation study has been carried out on a crystal of YBa2Cu3O6 + x with a low oxygen content (x = 0.15–0.20) to investigate the so-called 2√2 a0 × √2 b0 × c0 phase, attributed up to now to oxygen ordering in the YBCO CuOx layers. This crystal was grown from a flux and quenched from 900°C. It is shown that neither the ordering of CuO...
Article
The effect of synthesis and postgrowth treatment (by annealing at various temperatures and partial oxygen pressures) conditions on structural homogeneity of YBa2Cu3Ox single crystals has been studied. The obtaining of single crystals with both high oxygen content and high critical temperatures Tc has been optimized. The wide range of postgrowth tre...
Article
Literature data and our studies are used to consider three types of structural inhomogeneity in perovskite-like superconductors. Their irregular mixed-layered structures differ in the nature and distribution of impurity layers. A three-dimensional diagram is suggested for each type of defect. A great variety of postgrowth conditions are discussed t...
Article
Modifications of elemental composition of Bi2Sr2CaCu2O8+x singlecrystalline surface under medium energy (3keV) electron irradiation have been investigated by AES. The doses reached 103C/cm2. It is shown, that electron bombardment leads to dissociation of the target material, displaying in the decrease of Bi content and increase of Sr, Cu and Ca one...
Article
The structural and chemical inhomogeneities of bismuth-based HTSC resulting in the formation of irregular mixed-layer structures of two types are revealed. To study the defects of this type, the profiles of the 00l reflections from the Bi-2212 single crystals were analyzed with the use of a matrix formalism developed for defective layer structures....
Article
The influence of oxygen partial pressure (po2 = 10−4–1.5 · 102 atm) during annealing on the Tc and lattice parameter c of Bi-2212 single crystals has been investigated. Antibate correlation between non-monotonous alteration of the c parameter and Tc with the increase in oxygen content has been revealed.[Russian Text Ignored].
Article
By means of X-Ray diffraction on single crystals of YBa2Cu3O6+x with a well defined oxygen content it is shown that the ortho-II phase 2a0xb0 exists in the range of 0.40(3) ≤ x ≤ 0.63. The crystals with x = 0.70(3) and x = 0.73(3) possess the 3a0xb0 superstructure. Both are caused by a short-range ordering of the Cu(1)-oxygen and Cu(1)-vacancy chai...
Article
Two quite different pinning mechanisms: the low-temperature intrinsic and high-temperature extrinsic have been observed in the Bi2Sr2CaCu2Oy single crystals.
Article
Optical constants spectra for Bi2Sr2CaCu2Ox single crystals with different stoichiometry have been studied in 1 - 4.5 eV region. Direct relation between Tc and 3.8 and 4.3 eV bands intensities have been established. The bands are supposed to be due to BiO (triply split) - Bi6p transitions in M point of BZ.
Article
Optical constants spectra for Bi2Sr2CaCu2O8+x single crystals with different stoichiometry have been studied in 1 ÷ 4.5 eV region. Direct relation between Tc and 3.8 eV and 4.3 eV bands intensities have been established. The bands are supposed to be due to BiO (triply split) - Bi6p transitions in point of BZ.
Article
The spectral dependences of the optical constants of Bi2Sr2CaCu2O(y) single crystals with varying oxygen contents have been investigated experimentally using photometric spectral ellipsometry. Measurements have also been made of the resistivity of the samples. The measured values of the real and imaginary parts of the pseudo-dielectric function and...
Article
Expression have been derived for the kinetics of dislocation growth of two-component crystals. They relate the growth rate V to the supersaturation and the concentration ratio of the components in the solution (γ). It has been shown that at constant supersaturation, the function V(γ) has a maximum whose position depends on the supersaturation and t...

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Projects

Projects (2)
Project
Processes of crystal growth from silution
Project
1) Meaningful alphanumeric coding of discrete distributions in the form of four parameters - rank formulas (R), C. Shannon information entropy as entropy of mixing (H), T. Petrov anentropy as information entropy of separation (A), T. Petrov tolerance as information entropy of purification (T). 2) Creation of databases with intensional alphabetical ordering of RHAT codes, with obtaining hierarchical, periodic systems of compositions. 3) Compaction of information on large data volumes in a table – a generalized rank formula reflecting the distribution of components by ranks in the database. 4) Introduction to the study of composition changes in bientropy diagrams (HA, HT) as an adequate means for describing fundamental, after G. Spencer, processes of differentiation and integration, separation and mixing with obtaining phase portraits of the studied processes. 5) The Petros3 software package is the main tool for working by the method is available for free download on the website http://tomaspetrov.ru