Indices of growth of danger for space activities from orbital debris and the related mitigation measures     

S. S. Veniaminov  I. I. Oleynikov  E. K. Melnikov 《Kinematics and Physics of Celestial Bodies》2016,32(5):227-232

Intensive development of near-earth space, often followed by breakups of spacecraft, has led to its significant and progressive contamination. Investigation of this problem seems to be of current importance. Collision of space objects (SO), whose relative velocities reaching up to 17.5 km/s, implies catastrophic consequences, especially for active SOs. Particular trouble is caused concerning piloted spacecraft, in particular for the International Space Station (ISS). In this paper, taking ISS as an example, the dangerous progressive growth of the contamination of near space is shown.  相似文献   

The Ctenophore,Beroe ovata Bruguière, 1789 – the New Invader in the Ecosystem of the Caspian Sea     

Sayapin  V. V.  Ushivtsev  V. B.  Oleynikov  E. P.  Dosaev  F. G. 《Oceanology》2021,61(5):662-667

Oceanology - In November 2020, the invasive ctenophore Beroe ovata Bruguière, 1789 was recorded in samples of gelatinous zooplankton from the northern and central parts of the Caspian Sea. The...  相似文献   

Cr-spinel assemblage from the Upper Triassic gritstones of the northeastern Siberian Platform     

E.I. Nikolenko  A.M. Logvinova  A.E. Izokh  V.P. Afanas’ev  O.B. Oleynikov  A.Ya. Biller 《Russian Geology and Geophysics》2018,59(10):1348-1364

An assemblage of Cr-spinels widespread in Carnian (Upper Triassic) diamondiferous deposits in the northeastern Siberian Platform is studied. Analysis of their morphology and chemical composition has revealed two dominant varieties of Cr-spinels and has demonstrated certain regularities in their distribution in the study area. Correlations have been established between the areal distribution of the recognized types of Cr-spinels and diamond varieties typical of kimberlite sources and between the distribution of Cr-spinels and rounded diamond dodecahedrons. The phase and chemical compositions of polyphase inclusions in the Cr-spinels are studied. The spatial arrangement of inclusions along the crystal growth zones indicates their primary genesis and trapping from the melt during crystallization. Compositional features of some minerals in the inclusions—SiO₂ impurity in apatite and high CaO contents (0.2-0.8 wt.%) in olivines—point to a nonkimberlite source of these Cr-spinels. The presence of K- and Na-containing phases and calcite in the inclusions indicates saturation of the initial melt with alkalies, Ca, and CO₂. The data obtained suggest that the numerous Late Vendian diatremes in K-rich alkaline basites of the Olenek Uplift area are the source of the dominant Cr-spinel variety.  相似文献   

Polyphase Inclusions in Chromium Spinels from Upper Triassic Gravelites from the Northeastern Part of the Siberian Platform     

Nikolenko  E. I.  Logvinova  A. M.  Izokh  A. E.  Afanasiev  V. P.  Oleynikov  O. B.  Biller  A. Ya. 《Doklady Earth Sciences》2018,480(1):656-660

Doklady Earth Sciences - A comparative study of the chemical compositions of chromium spinel and polyphase inclusions has been carried out. Chromium spinels were separated from the concentrate of...  相似文献   

Shrilankite Inclusions in Garnets from Kimberlite Bodies and Diamondiferous Volcanic–Sedimentary Rocks of the Yakutian Kimberlite Province,Russia     

A. Ya. Biller  A. M. Logvinova  S. A. Babushkina  O. B. Oleynikov  N. V. Sobolev 《Doklady Earth Sciences》2018,478(1):15-19

Pyrope–almandine garnets (Mg# = 28.3–44.9, Ca# = 15.5–21.3) from a heavy mineral concentrate of diamondiferous kimberlites of the largest diamond deposit, the Yubileinaya pipe, along with kimberlite- like rocks and diamondiferous volcano–sediments of the Laptev Sea coast, have been found to contain polymineral, predominantly acicular inclusions, composed of aggregates of shrilankite (Ti₂ZrO₆), rutile, ilmenite, clinopyroxene, and apatite. The presence of shrilankite as an inclusion in garnets from assumed garnet–pyroxene rocks of the lower crust, lifted up by diamond-bearing kimberlite, allows it to be considered as an indicator mineral of kimberlite, which expands the possibilities when searching for kimberlite in the Arctic.  相似文献   

Seasonal variation of space–time parameters of internal gravity waves at Kharkiv (49°30′N, 36°51′E)     

A.N. Oleynikov  D.M. Sosnovchik  V.D. Kukush  Ch. Jacobi  K. Frhlich 《Journal of Atmospheric and Solar》2007,69(17-18):2257

Internal gravity waves (IGWs) over Kharkiv (49°30′N, 36°51′E) have been studied by using an automatic goniometer of a meteor radar (AG MR), with its antenna directed to the East. The AG MR carries out Doppler measurements of the radial drift velocity and the position of the reflecting area of meteor trails. In order to obtain information about IGW parameters, an algorithm was used that processes the AG MR wind data by dividing the measured volume into several sub-volumes, and by carrying out wavelet analysis of wind variations in these areas. Results of 1 year (1987) of AG MR data show a good qualitative correspondence with literature results. There is an increase of IGW activity during the change of the zonal background wind in spring and autumn. It was found that the mean IGW horizontal phase velocity and predominating horizontal propagation direction change with season. However, the mean period (1.5 h), the dominant amplitude (30 m/s) and the vertical phase velocity do not strongly vary in the course of the year. The mean vertical and horizontal wavelengths were found to be 40 and 250 km, respectively.  相似文献