Abdul'myanov T.R.,Kazan State Power Engineering University
Moscow University Physics Bulletin | Year: 2014
In the present paper, the early evolution of the Solar System with regard to the process of the formation and mass growth of small bodies in protoplanetary rings is considered. This process is modeled with the use of the results that were obtained in the analysis of the libration motions of asteroids. It has been shown that libration centers could occur prior to the formation of the bodies, when the redistribution of gaseous-dust grains occurred in protoplanetary rings. The distribution density of gaseous-dust grains could be similar or equal to that in the Gaussian ring or its analogs for long-period librations. In this case, the bodies can be initially formed and grow in stable libration centers. © 2014, Allerton Press, Inc.
Dvoenosova G.A.,Kazan State Power Engineering University
Scientific and Technical Information Processing | Year: 2013
The question about the status of a document follows from the situation that has been established in modern science, where the concept of a "document" has lost any definiteness and the phenomena of the reality that it means have almost no boundaries in their diversity. What material objects are documents and what are not? This question still remains debatable. This question can be answered by introducing the concept "status of a document" into the categorical apparatus of document science. The goal of this paper is to conceptualize this idea. © 2013 Allerton Press, Inc.
Petrova N.,Kazan State Power Engineering University |
Hanada H.,Japan National Astronomical Observatory
Planetary and Space Science | Year: 2012
A brief description of targets and problems of the future Japanese project ILOM (In situ Lunar Orientation Measurement), which is planned to be realized as one of kinds of observations of lunar rotation at the second stage of SELENE-2 mission, is given in the article. One of the important elements of the project is placing of a small optical telescope on the lunar surface with the purpose to detect the lunar physical libration with high accuracy of 0.001 arc sec. Computer simulation of the future observations is being done with the purpose of their optimisation: effective placement of measuring system on the lunar surface and formation of scheduling of observations for monitoring the physical libration of the Moon. The results of the first stage of the simulation are presented in the paper. At this stage the software for the selection of stars and reduction of their coordinates onto the period of observations is developed, the tracks for the selected stars are constructed and analysed, their sensitivity to the internal characteristics of the lunar body, in the first place, to the selenopotential coefficients, is tested. Analyses of simulated stellar tracks observable from the lunar surface (in a polar zone) revealed a difference from daily parallels of stars in comparison with ground based observations. During one lunar day equal to 27.3 terrestrial days, a star moves along a spiral. In dependence on the longitude of the star, these spirals can be untwisted or twisted. In the latter case a star can describe a loop in the sky of the Moon during the observation period. The reason of such unusual astrometry phenomenon is the combination of the slow rotation of the Moon as compared with the Earth and the fast precession motion of the lunar pole (in comparison with precession motion of a terrestrial pole). Due to the physical libration the shifts of all tracks will be observed towards direction opposite the Earth. The tracks are sensitive to gravity model of the Moon and are different even for the most accurate modern gravity field models - LP150Q (Konopliv, 2000) and SGM100h (Matsumoto et al.; 2010). © 2011 Elsevier Ltd.
Zakirova Z.K.,Kazan State Power Engineering University
Bulletin of the Lebedev Physics Institute | Year: 2015
In this note we continue studying the 6-dimensional pseudo-Riemannian space V6(gij) with signature [+ +−−−−], which admits projective motions, i. e. continuous transformation groups preserving geodesics. We find a generic defining function of projective motion in the 6-dimensional pseudo-Riemannian space of the special type. © 2015, Allerton Press, Inc.
Kashaev R.S.-H.,Kazan State Power Engineering University |
Applied Magnetic Resonance | Year: 2011
Concentrated oil-in-water emulsions have been studied using nuclear magnetic resonance relaxometry (NMRR). To characterize the size distribution of water droplets, correlations between NMRR data and integral droplets diameters have been established and used for data interpretation. The dependences of parameters of emulsion components have been obtained from proton relaxation data after rotating magnetic field application and sedimentation. © 2011 Springer-Verlag.