bluuebunny/crossref_metadata_2025 huggingface dataset:
The predictability of seismicity and large earthquakes: Kamchatka 1962 to 2014
Authors: Malyshev A. I.
Published: May 2019

This paper reports the estimation of the predictability of seismicity and large earthquakes in Kamchatka as inferred from data in the Kamchatka regional catalog for 1962–2014. The mathematical model uses a second-order nonlinear differential equation, while the optimization algorithm and the estimates of predictability are the author’s own. The estimates show a high predictability of seismicity; the extrema of prediction nonlinearity typical of large earthquakes usually occur simultaneously with similar extrema of seismicity as a whole. Overall, 220 large (K ≥ 13.3) Kamchatka earthquakes were analyzed to find that foreshock predictability was available for 200 earthquakes (~30000 determinations) and aftershock predictability for 215 earthquakes (~300000 determinations). The predictability related to large earthquakes began to be seen and was rapidly increasing at intermediate (7.5–30 km) radii of hypocenter samples. The prediction distances over time were some tens and hundreds of days for foreshock predictability and some hundreds and thousands of days for aftershock predictability. These results demonstrate very good promise for the approximation extrapolation approach to the prediction of both large earthquakes themselves and of subsequent aftershock decay of seismic activity.
Global statistics of aftershocks following large earthquakes: independence of times and magnitudes
Authors: Baranov S. V. , Shebalin P. N.
Published: May 2019

This paper considers the global statistics of times of largest aftershocks relative to the times of the corresponding main shocks. A large data set was used to show that the time-dependent distribution of largest aftershocks obeys a power law distribution. This is analogous to the Omori law for the sequence of all after- shocks. It is also shown that the times of the second, etc., largest aftershocks obey the same distribution. Thereby, we have confirmed the hypothesis that the times and magnitudes in an aftershock sequence are independent and make a good case for the Reasenberg-Jones representation of the aftershock process as a superposition of the Omori-Utsu law and the Gutenberg–Richter relation. Events that are smaller than the largest in an aftershock sequence show no delay relative to the largest event; this rejects the idea of the after- shock process as a direct failure cascade involving gradual transitions from larger to lesser scales, which imposes certain restrictions on the widely popular stochastic models of aftershock generation as branching processes. The above result is important in practice for prediction of aftershock activity and for assessing the hazard of large aftershocks.
Seismic-strain and acoustic monitoring of geodynamical processes by high sensitive and spatially distanced instruments in seismo-energy-active and aseismic zones
Authors: Aleksandrov D. V. , Dubrov M. N. , Larionov I. A. , Marapulets Yu. V. , Shevtsov B. M.
Published: May 2019

The results of wideband geophysical processes observations by means of laser strainmeters and special geo-acoustic equipment are presented. The examples of synchronous registering of strain-seismic and geo-acoustic earth oscillations in Kamchatka and Moscow region as well as parallel analysis of the obtained data are shown. These results reveal the possibility of the introduced technics application for local and global disturbances of investigated processes separation.
Correction to article “Alekseeva T.A, et al. comparing the satellite microwave and visual shipborne sea ice concentration
Authors: Alekseeva T. A. , Tikhonov V. V. , Frolov S. V. , Raev M. D. , Repina I. A. , Sokolova Yu. V. , Afanasieva E. V. , Sharkov E. A. , Serovetnikov S. S.
Published: May 2019

This publication contains the correct version of Figure 2.
Relationship of the brightness temperature anomalies of the lower troposphere with the climate indices on the Southern Urals
Authors: Vasil’ev D. Yu. , Velikanov N. V. , Vodopyanov V. V. , Krasnogorskaya N. N. , Semenov V. A. , Christodulo O. I.
Published: May 2019

This paper presents an analysis of the average monthly temperature of the lower troposphere (TLT) according to satellite sensing data for the period 1979–2017 in the Southern Urals. In order to study the space-time structure of TLT, the method of decomposition of the temperature series into empirical orthogonal components (EOC) was used. A correlation analysis of the link between the identified EOC for winter and summer seasons and indices of large-scale modes of natural climate variability in the Northern hemisphere was carried out. The first leading EOC, which describes a negative temperature trend, makes the major contribution to the overall variability. For winter, the leading mode is associated with the North Atlantic oscillation. For summer, a significant contribution of the Atlantic multi-decadal oscillation and the index of the Arctic sea ice concentration anomalies is revealed, which can be used to improve the reliability of the future scenarios of the regional climate change. The results suggest a significant impact of natural climatic variability on the temperature regime and a possible difficulty in identifying the anthropogenic component of climate change in the studied region.
Selection of informative features to highlight areas of waste disposal on high spatial resolution satellite imagery
Authors: Murynin A. B. , Richter A. A. , Shakhramanyan M. A.
Published: May 2019

The paper deals with the problem of integrated interpretation of waste disposal facilities according to satellite imagery and ground truth monitoring, features of space images of landfills from various points of view: texture analysis, statistical properties, fractal analysis, color features, and the possibility of using machine learning methods. The main visual interpretive signs of landfills on optical and radar images of high spatial resolution are given. The fractal dimension of landfills was calculated for high resolution images using two models.
Dynamic modeling for the morphological pattern of thermokarst plains with fluvial erosion on the base of remote sensing data
Authors: Viktorov A. S. , Kapralova V. N. , Arkhipova M. V.
Published: May 2019

The paper deals with the results of the analysis of the dynamic mathematical model for the morphological pattern of thermokarst plains with fluvial erosion basing on the mathematical morphology of landscape approach and remote sensing data. The theoretical analysis resulted in the dynamic mathematical model for the morphological pattern of thermokarst plains with fluvial erosion, which was empirically tested at a set of the key sites. The empirical testing confirms the theoretical results about the exponential distribution of khasyrei areas in different natural environments with a broad geological and geocryological spectrums. Moreover, the area distribution of thermokarst lakes obeys both gamma and lognormal distributions. We have found that the average radius and diameter distributions should be the Raleigh one. The analysis shows that the variant of the thermokarst synchronous start is the most common for the taken key sites. Besides, the model allows us to assess certain dynamic parameters of the processes using landscape metrics from a single time slice.
The distribution of the desalinated waters of the amur estuary in the okhotsk sea according to satellite observations
Authors: Andreev A. G.
Published: May 2019

The distribution of the desalinated waters of the Amur Estuary in the Northwestern ​​Okhotsk Sea during the summer period was analyzed using satellite data on sea level, salinity, temperature and concentrations of suspended organic carbon. There is good agreement between the spatial distribution of surface water salinity (data from the SMAP satellite) and the sea level (AVISO data) in the study area. The identification of the waters of the Amur Estuary by the surface water temperature and the concentration of suspended organic carbon is limited to the Sakhalin Bay and the coastal waters of Sakhalin Island. An increase (decrease) in the flow of the Amur River during the spring-summer flood leads to an increase (decrease) in sea level in the northern part of the Sakhalin Bay in July. Strengthening of the northwestern (southeastern) winds in September reduces (increases) the inflow of waters with low salinity and elevated sea level to the area north of the Sakhalin Bay.
New data on age, material composition and geological structure of the Central Kamchatka depression (CKD). Part 1. Rocks types. Age, petrological and isotopo-geochemical characteristicsн
Authors: Koloskov A. V. , Davydova M. Yu. , Kovalenko D. V.
Published: May 2019

The paper presents new age and isotope geochemical characteristics for plateau effusive rocks from the Central Kamchatka Depression (CKD) and Nikolka Volcano. We compared these data with the data on rocks from the Klyuchevskoy group of volcanoes and also Sheveluch, Kharchinsky, Zarechny, Nachikinsky, Bakening volcanoes and NEB-adakites from Pliocene shield volcano between the Ozernaya Kamchatka and Pravaya Kamchatka rivers. It is shown that the evolutionally advanced (often more alkaline) rock from Nachikinsky, Bakening, Nikolka volcanoes and the Pliocene shield volcanoe significantly differ in isotope-geochemical characteristics from the Klyuchevskoy group of volcanoes rocks. Exactly this type of rocks is characteristic for CKD as rift structure. The Klyuchevskoy group of volcanoes rock are not typomorphic for this structure and manifest the usual orogenic volcanism stage, typical for much larger area. Miocene plateau effusive rocks differ from rocks of this group only by slightly increased potassium alkalinity. The rift type rocks characteristic feature is not only their increased alkalinity, but also specific microcomponents ratios: Ti/V > 0.004, Nb/Y > 0.28, Dy/Yb > 2.00, La/Yb > 6.5, Sm/Yb > 2.4, Lu/Hf < 0.08. Along with isotopic characteristics, these ratios suggest the existence of the single deep asthenospheric mantle reservoir for initial melts. The Kurile-Kamchatka and Commander-Aleutian island-arc systems’ junction is marked by the increased fluid enrichment (Ce group of REE) of melts for rocks of certain volcanoes: Shiveluch, Kharchinsky, Zarechny.
Reservoirs of the Catchment Areas of the Arctic Seas of Russia
Authors: Barabanova E. A.
Published: May 2019

The spatial-temporal distribution of reservoirs in the catchment areas of the seas of the Arctic Ocean within the Russian Federation and the main rivers flowing into them have been analyzed. Additionally, Ob River is considered as a whole together with the Kazakh part of the Irtysh Basin. The stages of hydrotechnical development of water resources have been identified and characterized. The influence of reservoirs on the water regime and the annual discharge of the main rivers flowing into the Arctic Ocean have been determined. The prospects for the creation of reservoirs are shown.
Slow and rapid oscillations in an optoelectronic oscillator model with delay
Authors: Grigorieva E. V. , Kashenko S. A.
Published: May 2019

The local dynamics of an optoelectronic oscillator model characterized with feedback delay is investigated. In the neighborhood of the zero equilibrium state, normalized equations are constructed, which are boundary value problems depending on the continuumal parameter. Such problems are used to determine the asymptotic solutions of the original nonlinear system, mainly the frequencies and amplitudes of the components, in the form of a combination of slow and fast oscillations.
Block finite-element model of layer-by-layer analysis of three-layer stress–strain state in general irregular shells of rotation of double curvature
Authors: Bakulin V. N.
Published: May 2019

This study proposes a finite-element block approach to building a new, refined model for layer-by-layer analysis of the stress–strain state of generally irregular sandwich shells of revolution with double curvature. A core material model is developed for the first time for such shells, based on more precise statements compared to those of similar common models; it allows the avoidance of the discontinuity of generalized displacements on the surfaces of an interface with base layers and switching to simpler models depending on the problem statement. Using the proposed model, it is possible to create an allowance for the changes in the properties and parameters of the stress–strain state in all the three coordinates, to which the shell is assigned, and to obtain a solution within the specified statement for different shell shapes and boundary conditions of layers, including in the case of discontinuity.
Peano-type curves, Liouville numbers, and microscopic sets
Authors: Agadzhanov А. N.
Published: May 2019

Peano-type curves in multidimensional Euclidean space are considered in terms of number theory. In contrast to curves constructed by D. Hilbert, H. Lebesgue, V. Sierpinski, and others, this paper presents results showing that each such curve is a continuous image of universal (shared by all curves) nowhere dense perfect subsets of the interval [0, 1] with a zero s-dimensional Hausdorff measure that consist of only Liouville numbers. An example of a problem in which a pair of continuous functions controlling the behavior of an oscillating system generates a Peano-type curve in the plane is given.
Formation conditions of host rocks and veins productive deposits of the Astrakhan gas-condensate field
Authors: Sokerina N. V. , Zykin N. N. , Shanina S. N. , Valyaeva O. V. , Isaenko S. I. , Sokerin M. Yu.
Published: May 2019

This study examines one- (gas) and two-phase (aqueous solution–gas) inclusions in the calcite of the Cheremshanskian Horizon of the Bashkirian stage at a depth of 4,215–4,217 m in the Pravoberezhnaya-1 well. Homogenizing temperature is within 100–134 °C, which is likely close to the temperature of mineral formation. Calcite vein formation involves calcium bicarbonate fluid enriched in Mg chloride. It was established the calcite inclusions contain carbon dioxide, methane, and hydrogen sulfide. The gas composition of the inclusions in limestone is distiuguished of its high carbon dioxide concentration but rather low methane and hydrogen sulfide concentration.
Double asymptotic expansion of the resolving operator of the cauchy problem for the line-arized system of gas dynamics
Authors: Allilueva A. I. , Shafarevich A. I.
Published: May 2019

We obtain double asymptotic expansion (with respect to smoothness and small viscosity) of the resolving operator of the Cauchy problem for the linearized system of gas dynamics. We derive estimates for the summands and for the residual in the Sobolev scale.We describe explicitly hydrodynamic and acoustic modes.
Sub-Finsler problem on Cartan group
Authors: Ardentov A. A. , Sachkov Yu. L.
Published: May 2019

Left invariant l-infinity sub-Finsler problem on Cartan group is considered as time-optimal control problem. We describe abnormal and singular normal trajectories, then prove that all such trajectories are optimal. We construct the bang-bang flow and obtain upper bounds on the number of switchings on bang-bang and mixed minimizers.
Heat capacity and thermal expansion of yttrium tantalate
Authors: Khoroshilov A. V. , Ashmarin A. A. , Guskov V. N. , Sazonov E. G. , Gavrichev K. S. , Novotortsev V. M.
Published: May 2019

The isobaric heat capacities of two monoclinic (M' and M) modifications of yttrium orthotantalate at temperatures 5–1300 K have been measured by the adiabatic and differential scanning calorimetry methods. It has been demonstrated that the difference in structure between the crystal lattices of M' and M has small effect in the heat capacity, and the difference between the heat capacities of these phases Cp(M)-Cp(M') is small, always positive, and increases in the range of the lowest temperatures. The unit cell parameters of M-YTaO4 have been determined as a function of temperature in the range 300–1173 K.
Embedding of spaces of functions of positive smoothness on irregular domains
Authors: Besov O. V.
Published: May 2019

For spaces of functions of positive smoothness defined on irregular domain of n-dimensional Euclidean space, an embedding theorem into spaces of the same type and related results are presented.
Solid state catalytic hydrogen exchange for deuterium in cycloprolylglycine
Authors: Dadayan A. K. , Borisov Yu. A. , Bocharov E. V. , Zolotarev Yu. A. , Nagaev I. Yu. , Myasoedov N. F.
Published: May 2019

The reaction of spillover hydrogen (SH) with cyclopropylglycine (cPG) in high-temperature solid-state catalytic hydrogen isotope exchange (HTCIE) has been studied experimentally and using density functional theory (DFT). NMR spectroscopy and mass spectrometry have shown a high regioselectivity and stereoselectivity for the reaction of spillover hydrogen with cPG fragments. The Gly fragment has been shown to be the most reactive in HTCIE, for which high stereoselectivity of substitution of hydrogen by deuterium has been demonstrated.
Selenium in pyrite ores
Authors: Vikentyev I. V. , Belogub E. V. , Moloshag V. P. , Eremin N. I.
Published: May 2019

Own Se minerals, first established in primary ores of VMS deposits of the Urals, are described. Instrumental neutron activation analysis of bulk ore samples, mineral monofractions and local methods of analysis: LA-ICP- MS, electron probe microanalysis and analytical electron microscopy were used. CSe in ores of the Urals to 977 g/t. Significant positive correlation of Se with Te, S, Fe, Co, Mo, Hg, Bi is characteristic. Selenium is con- centrated in the main sulfides, mainly in pyrite (73 g/t), chalcopyrite 49 g/t, pyrrhotite 48 g/t; in sphalerite usually <10 g/t. High Se content (up to 1–3 wt.%) occurs in the minor and rare minerals from massive sulfide ores (mainly compounds of Pb, Te, Bi): tetradymite, galena, tellurobismuthite, altaite, wittichenite. Own Se minerals in ores are represented by kawazulite, clausthalite, galena-clausthalite Pb(Se,S), micron inclusions composition (Ag, Cu)2(Se, S), (Ag, Pb)3(Te, Se)S, (Ag, Pb)2(S, Se).
Kinetics of chemical processes in the human brain. Trigger effect and self-stabilization of N-acetylaspartic acid
Authors: Varfolomeev S. D. , Semenova N. A. , Bykov V. I. , Tsybenova S. B.
Published: May 2019

A kinetic model was proposed for the response of nerve tissue to an external signal stimulus. The model is based on the views of a multistep and non-linear nature of the dynamic variation of the concentrations of N-acetylaspartic acid and N-acetylaspartate in the human nerve tissue. The substrate inhibition effect in this system is a necessary factor for the self-stabilization of N-acetylaspartate as a key brain metabolite. The existence of three stationary states accounts for the trigger behavior of the system.
Effect of “cobalt–carbon nanotubes” catalysts on anthracene coking
Authors: Chesnokov V. V. , Chichkan A. S. , Parmon V. N.
Published: May 2019

Coking of anthracene at 400–600°C in the presence or in the absence of a cobalt catalyst supported on carbon nanotubes (CNTs) was studied for the first time. The coking products were examined by X-ray diffraction and electron microscopy. The CoO-CNTs catalyst considerably (by 50°C) decreased the temperature of the onset of coking and accelerated the coke formation. The presence of CoO-CNTs changed the coke morphology. Whereas coking of pure anthracene affords ~1 micron spherical particles of poorly crystallized carbon, in the presence of the catalyst, a carbon “coating” covering the CNT surface is formed.
Experience in applying a local analysis an sulfur isotopes in the ore sulfides of the largest deposits of Bodaibinsky Synclinoria (Eastern Siberia)
Authors: Goryachev N. A. , Ignatiev A. V. , Velivetskaya T. A. , Budyak A. E. , Tarasova Yu. I.
Published: May 2019

The experience of LA—ICP determining of the isotopic composition of sulfur pyrite and arsenopyrite of gold deposits of the Baikal-patomsky plateau is considered. The technique is characterized. It is shown that all the studied samples have values δ34S and δ33S strictly corresponding to the law of mass-dependent fractionation of sulfur isotopes. A regular alleviation of the isotopic composition of sulfur of pyrite as its crystals grow for Sukhoi Log and the isotopic homogeneity of pyrite and pyrrhotite of the Golets Vysokhashiy deposit are established. It is concluded that the possible role of metamorphism of the Mamsko-Oronsky belt in the formation of isotopic homogeneity of ore sulfides.
Mapping of interplate coupling in the Kamchatka subduction zone from variations in the earthquake size distribution
Authors: Vorobieva I. A. , Soloviev A. A. , Shebalin P. N.
Published: May 2019

The geometry of supposed coupling zones in the Kamchatka subduction zoneis determined by the earthquake size distribution based on earlier revealed relationship between its shape and rate of inelastic deformations. In the areas of higher aseismic slip, a break of linearity in earthquake size distribution is observed owing to the deficit of large earthquakes. Zones of higher coupling between the oceanic and continental plates are characterized by an excess of large earthquakes and an inverse bend in the earthquake size distribution. The mapping results of the bend value agree with the coupling zones distinguished from satellite geodetic data and inversion of marigrams.
Attenuation of gravity waves in fast ice
Authors: Levin B. V. , Kovalev P. D. , Kovalev D. P. , Kirillov K. V.
Published: May 2019

The attenuation coefficients of sea waves in ice in the coastal zone of the Sea of Okhotsk with periods from 4 to 30 s were estimated as a function of their wavelength based on observations. We used the model dispersion relation for these waves in ice and calculated the theoretical attenuation coefficients. We compared them with those from the data of experiments based on the relation of the spectral energies of waves in ice-free water and in ice. It is possible to use the estimated attenuation coefficients for waves of different periods to calculate the distance of wave propagation in fast ice with the critical amplitude where ice breaking is possible.
Inversion of hyperoutput time-delay systems
Authors: Il’in A. V. , Atamas E. I. , Fomichev V. V.
Published: May 2019

An inversion problem for LTI hyperoutput time-delay system is considered. For such systems canonical form with isolated zero dynamics is obtained, system invariant zeros and their relation to spectral observability of zero dynamics subsystem are investigated. Using this results, inversion algorithm is suggested for time-delay systems.
New approach at x-ray investigation of microstructure of supersaturated films of CdxPb1-xS solid substitutional solutions
Authors: Vaganova I. V. , Maskaeva L. N. , Voronin V. I. , Markov V. F. , Bamburov V. G.
Published: May 2019

The films of supersaturated CdxPb1-xS solid substitutional solutions (0 < x < 0,25) with thickness 0.6–1.0 μm were synthesized by chemical bath deposition. The dependences of dislocation density, crystallite sizes and texture coefficient versus the cadmium content in the films were determined by analyzing X-ray diffraction spectra with the use of modified method of Williamson—Hall (MWH).
Thermodynamic analysis of the interaction of components in the Si–C–O system in the carbothermic synthesis of silicon carbide
Authors: Lebedev A. S. , Eremyashev V. E. , Trofimov E. A. , Anfilogov V. N.
Published: May 2019

Phase equilibria in the Si–C–O system at temperatures of 1400–1700°C were modeled to theoretically determine the optimal conditions for implementing our proposed method of carbothermic synthesis of silicon carbide in reactors with an autonomous protective atmosphere. It was found that, depending on the ratio between the initial components and the synthesis temperature, the equilibrium products of the synthesis can be various combinations of silicon carbide, a gas phase, residual amounts of silicon oxide and carbon, andan oxide melt formed at high temperatures.
Magnetic resonance imaging of water absorption by highly porous ceramic materials
Authors: Morozov E. V. , Bouznik V. M. , Bespalov A. S. , Graschenkov D. V.
Published: May 2019

By using the magnetic resonance imaging method the nontrivial character of water absorption was demonstrated for the first time in highly porous ceramic materials. The effect of hygroscopic memory was found out which is that the preferable concentration of absorbed water in certain areas within the sample persists regardless the subsequent sample wetting history. Coating the oxide fibres with fluorine-containing hydrocarbons in supercritical CO2 in order to hydrophobize the material has been shown to affect substantially the water transport within the sample that can be referred to as an effective approach to protect the porous materials from humid environment. The results obtained demonstrate the advantages of the magnetic resonance imaging in studying the water absorption processes and visualization of water pathways in highly porous ceramic materials.
The physical nature of heterogeneity of the composition of river water
Authors: Chashechkin Yu. D. , Rosenthal O. M.
Published: May 2019

Experimental data are presented to show that the spatial and temporal variability of the composition of river waters cannot be explained solely by the influence of sources and effluents of the substances and that there are additional significant factors that support or even initiate the dispersion of the concentration of pollutants here. This variation is reflected in the resources and the economic characteristics of the rivers; so identification of its reason is important. Thus, the hydrodynamic structure of the water flow is studied by analyzing the complete system of equations of fluid motion mechanics. The completed work allowed us to show that the elements of this structure are waves, vortices, and highly gradient layers (ligaments), presumably creating the described dispersion effect. Further investigation of the relationship of the precise hydrodynamic and hydrochemical structures of river waters will contribute to better understanding of the water-environmental processes, ensuring the perfection of water management methods.
Large-scale atmospheric–oceanic interaction regimes in the Norwegian and Barents seas
Authors: Sizov A. A. , Mikhailova N. V. , Bayankina T. M.
Published: May 2019

Large-scale atmosphere–ocean interaction in the Atlantic sector of the Arctic Ocean is analized. New studies demonstrate that the variability of Atlantic water inflow into Nordic seas is driven largely by the leading mode of year-to-year variations in the ocean – atmosphere system–the North Atlantic Oscillation (NAO). A new vision of the effect of the NAO on the hydrophysical characteristics of the Norwegian and Barents seas is offered.
Personalized approach to assessing mRNA expression of histidine-rich glycoprotein and immunohistochemical markers in diseases of the breast
Authors: Autenshlyus A. I. , Golovanova A. V. , Studenikina A. A. , Brusentsov I. I. , Proskura A. V. , Zhurakovskiy I. P. , Arkhipov S. A. , Sidorov S. V. , Vavilin V. A. , Lyakhovich V. V.
Published: May 2019

Biopsy material of patients with malignant and benign breast diseases was examined. HRG mRNA expression was detected in 70% of cases in biopsy material obtained from patients with nonspecific invasive carcinoma and in 66.7% of cases in biopsy material of patients with benign breast diseases. Immunohistochemical analysis revealed expression of collagen II, the beta-1 integrin, and E-cadherin – markers of epithelial–mesenchymal transition. The use of RT-qPCR combined with immunohistochemical study made it possible to identify atypical cells, which can be regarded as precancerous changes, in individual patients.
Oncogene c-MYC controls the expression of PHF10 subunit of PBAF chromatin remodeling complex in SW620 cell line
Authors: Tatarskiy Eu. V. , Georgiev G. P. , Soshnikova N. V.
Published: May 2019

The PBAF(SWI/SNF) multiprotein complex, which changes the chromatin structure, is widely involved in the regulation of eukaryotic gene expression. A specific component of this complex is the PHF10 protein, which is involved in recruiting this complex to chromatin. We showed that the PHF10 expression in cells of different lines is activated by the c-MYC oncogene. Since PHF10 stimulates cell proliferation, its c-MYC-dependent activation in cancer cells should lead to an increase in their proliferation rate.
Detailed description of the evolution mechanism for singularities in the system of pressureless gas dynamics
Authors: Aptekarev A. I. , Rykov Yu. G.
Published: May 2019

The system of pressureless gas dynamics is a hydrodynamically justified generalization of the system consisting of the Burgers vector equation in the limit of vanishing viscosity and the mass conservation law. The latter system of equations was intensively used, in particular, in astrophysics to describe the large scale structure of the Universe. The solutions of the vector Burgers equation involve interesting dynamics of singularities, which can describe concentration processes. However, this dynamics does not satisfy the law of momentum conservation, which prevents us from treating it as dynamics of material objects. In this paper, momentum-conserving dynamics of singularities is investigated on the basis of the pressureless gas dynamics system. Such dynamics turns out to be more diverse and complex, but it is also possible to formulate a variational approach, for which the basic principles and relations are obtained in the work.
On classical solutions to the first mixed problem for the Vlasov-Poisson system in an infinite cylinder
Authors: Belyaeva Yu. O. , Skubachevskii A. L.
Published: May 2019

The first mixed problem for the Vlasov-Poisson system in an infinite cylinder is considered. This problem describes the kinetics of charged particles in a high-temperature two-component plasma under an external magnetic field. For an arbitrary electric field potential and a sufficiently strong external magnetic field, it is shown that the characteristics of the Vlasov equations do not reach the boundary of the cylinder. It is proved that the Vlasov-Poisson system with ion and electron distribution density functions supported at some distance from the cylinder boundary has a unique classical solution.
11B NMR STUDY OF AMORPHOUS ALLOYS Fe85-xCrxB15 (x = 0-20)
Authors: Pokatilov V. S. , Sigov A. S. , Makarova A. O. , Pevtsov E. F.
Published: May 2019

Amorphous alloys Fe85-xCrxB15 (x = 0-20), prepared by rapid quenching of the melt, have been studied by pulsed nuclear magnetic resonance (NMR) on nuclei 11B at a temperature of 4,2 K. The amorphous alloys consist of nanoclusters with short-range order of the tetragonal t-(Fe, Cr)3B and α-(Fe, Cr) phases which contain chromium atoms in the nearest surroundings of boron atoms. The average magnetic moments of magnetic atoms in the nearest sphere of boron atoms in nanoclusters and their dependence on the chromium content in alloys are estimated.
Variations in the strain parameters of titanium nickelide during martensitic transformation cycling
Authors: Erofeev V. Ya. , Kabanov M. V.
Published: May 2019

The results of analyzing the long-term variations in the strain rate of a TiNi element during martensitic transformation cycling have been reported. It is shown that the factors involved in the formation of the state of the environment lead to unstable operation of functional technical elements similar to those based on titanium nickelide.
Electrospray preparation of biocompatible lactide–glycolide copolymer capsules with incorporation of interferon
Authors: Khlusov I. A. , Kibler E. V. , Kudryavtseva V. L. , Tverdokhlebov S. I. , Bolbasov E. N. , Botvin V. V. , Latypov A. D. , Gazatova N. D. , Litvinova L. S. , Buznik V. M. , Choynzonov E. L.
Published: May 2019

The electrospray method was used for the first time to prepare polymeric capsules from bioresorbable dl-lactide and glycolide copolymer loaded with biological molecules from the cell secretome and, in particular, human interferon a-2b (IFN a-2b). The obtained nearly spherical submicron capsules were studied by scanning electron and confocal laser microscopy. The capsules retain the structural integrity and the cytotoxic activity of IFN a-2b towards tumor cells. The electrospray method is distinguished by high adaptability and environmental safety and is suitable for manufacture of a broad range of materials with different composition and morphology promising for the targeted delivery of drugs and biological molecules.
Comparison of borehole geoacoustic and electromagnetic data with data of earthquake focal mechanisms
Authors: Gavrilov V. A. , Lander A. V. , Morozova Yu. V.
Published: May 2019

The results of comparing the data of two methods of geophysical monitoring of the stress-strain state of a borehole of the geoenvironment in the zone of Petropavlovsk-Kamchatsky geodynamic testing site to the data on the focal mechanisms of earthquakes that occurred in this zone on the same time interval are presented.
Features of vortical suppression of tsunami waves underwater barriers
Authors: Boshenyatov B. V. , Zhiltsov K. N.
Published: May 2019

The features of vortical suppression of tsunami waves by an impermeable underwater barrier have been studied. The height of the barrier is close to the optimum corresponding to the maximum effect of vortical suppression of the wave energy. It is shown that the energy of suppressing tsunami waves by such a barrier depends on the wave height and can vary from zero to 80% of the incident wave energy.
The steroidogenic effect of a low-molecular agonist of luteinizing hormone receptor in the course of its administration to male rats
Authors: Bakhtyukov A. A. , Derkach K. V. , Dar'in D. V. , Shpakov A. O.
Published: May 2019

The thienopyrimidine derivative TP03 (a low molecular weight agonist of the luteinizing hormone receptor, LHR), when administered to male Wistar rats, stimulated the production of testosterone (“T”), elevated level of which was maintained for 7 days, and increased the expression of the LHR gene. At the same time, the steroidogenic effect of human chorionic gonadotropin (hCG), which significantly increased the “T” level on the first day of treatment, was further weakened, which was accompanied by a decrease in the expression of the LHR gene in the testes, indicating the development of resistance of Leydig cells to hCG. In the testes, the hCG treatment induced a compensatory increase in the expression of genes of the steroidogenic enzymes, such as the cytochrome P450scc and the dehydrogenase 3P-HSD. In the case of TP03 treatment this effect was absent.
Quality assessment of decellularization and recellularization of tissue-engineering constructions by the chemiluminescence method
Authors: Gubareva E. A. , Kuevda E. V. , Kade A. Kh. , Bykov I. M. , Pavlyuchenko I. I. , Gaivoronskaya T. V. , Sidorenko A. N. , Tsymbalov O. V. , Ovsyannikov V. G. , Myasnikova V. V. , Shashkov D. I. , Dzhimak S. S.
Published: May 2019

It has been established that indicators of the intensity of chemiluminescence in the native and muscle cellized tissues of rat muscular organs, as well as in their decellularized matrices, can serve as one of the express criteria that allows, along with ultrastructural analysis, to quantify the viability of cell structures in biological samples of the diaphragm.
To the analysis of weak two-locus viability selection and quasi linkage equilibrium
Authors: Pasekov V. P.
Published: May 2019

A model of weak viability selection at two multi-allele loci with standardization of approaches through the use of perturbation theory is examined. The estimate of the quasi-equilibrium value for the linkage disequilibrium coefficient D is analyzed, and results in terms of average effects in quantitative genetics and in terms of the theory of singular perturbations in mathematics are obtained. The approximation of a discrete-time model of a random mating population with non-overlapping generations under weak selection by ordinary differential equations is considered. Weak selection is considered as a perturbation of the model without selection. The resulting model is singularly perturbed; that is, fast (D) and slow (allele frequencies) variables can be distinguished. The first approximation equation for quasi-equilibrium of D is obtained using the first terms of the Taylor series expansion of the model functions. It coincides with the corresponding part of the system of the first approximation of the asymptotic series for solving singularly perturbed equations.
Bone cements based on magnesium-substituated calcium sulfates
Authors: Smirnov V. V. , Khayrutdinova D. R. , Smirnov S. V. , Antonova O. S. , Goldberg M. A. , Barinov S. M.
Published: May 2019

New materials based on calcium sulphate with the replacement of calcium cations to magnesium cations – 10, 20 and 40 mol.% were obtained. The synthesis of substituted forms of calcium sulphate, the study of the phase composition, and the strength of the obtained materials were carried out in the work. It is shown that the solubility of the synthesized materials increases with increasing of the degree of substitution. The obtained materials are acceptable for the preparation of composite biomaterials on their basis for the regeneration of bone tissue and carriers of drugs.
Sr-Nd-Pb-Hf isotopic composition of late paleozoic granitoids of Central Chukotka
Authors: Luchitskaya M. V. , Belyatsky B. V. , Belousova E. A. , Natapov L. M.
Published: May 2019

Results of the study of Sr–Nd–Pb–Hf isotopic composition of Late Paleozoic granitoids of Central Chukotka are represented on the example of Kibera and Kuekvun plutons. The age of granitoids of these plutons and granites from pebbles in conglomerates in the base of overlying Lower Carboniferous deposits is 351–363 Ma (U–Pb zircon, TIMS, SIMS, LA–ICP–MS). Thus, granitoid magmatism corresponds in time to tectonic events of Elsmerian orogeny in Arctic region. Sr–Nd–Pb–Hf isotopic composition of granitoids indicate participation of mantle and crustal components in the source of granite melts. Granitoids formation probably occurred in geodynamic setting of Andean type continental margin during the interaction between mantle melts, forming at the mantle wedge melting in suprasubduction conditions, and continental crust.
Methane concentration and emission in dominant landscapes of typical tundra of Western Yamal
Authors: Vasiliev A. A. , Melnikov V. P. , Semenov P. B. , Oblogov G. E. , Streletskaya I. D.
Published: May 2019

Methane concentration in dominant landscapes of typical tundra of Western Yamal has been measured. The highest methane content in the active layer was measured in tundra bogs, wet gully bottoms, and polygonal tundra. Within these landscapes, methane concentration reaches 5000 ppm, while in other landscapes it does not exceed 300 ppm. Thus, only bogs, polygonal tundra, and gully bottoms, which occupy approximately 30–40% of the area, are the main sources of methane emission in the typical tundra zone. Measurements of methane emission to the atmosphere have been performed. During the summer maximum of emission, daily methane flux in bogs reaches 14.4 mg/m2 (20.3 ml/m2).
Estimates of the average angular velocity of the precession of Lagrange's top
Authors: Rozenblat G. M.
Published: May 2019

Guaranteed upper and lower estimates of the increment in the precession angle per nutation angle period under nondegenerate motions of a Lagrange top have been obtained in the article.
Self-propagating high-temperature synthesis of ZrB2-B4C composites with the dispersed phase as hollow shells
Authors: Shcherbakov V. A. , Gryadunov A. N. , Alymov M. I.
Published: May 2019

The formation of the microstructure of ZrB2-B4C ceramic composites produced by SHS pressing has been studied. It has been shown that the exothermic interaction in a mixture of Zr, B, and C powders gives an equilibrium SHS product containing ZrB2 as a dispersed phase and B4C – as a ceramic binder. The effect of the ceramic binder (B4C) content on the formation of the microstructure of SHS composites has been studied. It is shown, at content of B4C 10-20 wt% homogeneous SHS composites were formed consisting monolithic the ZrB2 particles with a size of 10-12 pm, and at content of B4C 20-40 wt% – hollow shells consisting of the ZrB2 particles.
On the use of natural electromagnetic fields to search for deep polarized objects
Authors: Ermokhin K. M. , Kopytenko Yu. A. , Petrishchev M. S. , Sobisevich A. L. , Sergushin P. A.
Published: May 2019

In article the possibility of detection of the deep polarized objects in natural electromagnetic fields is experimentally proved on the basis of synchronous measurements of a vertical component of long-period variations of magnetic field of Earth. Interpretation of data of the induced polarization is executed by method of analytical continuation of geophysical fields down (towards sources). Experimental works are completed near Lekhta (Karelia) in 2017.
Ligand docking to the acidic pocket of the proton-gated ion channel ASIC1a
Authors: Korkosh V. S. , Tikhonov D. B.
Published: May 2019

Proton-gated ion channels of ASIC family play important role in many physiological and pathological processes and represent a perspective target for pharmacological modulation. Recently, atomic-scale structures of ASICs in closed, open and desensitized states have become available. This opened a possibility to model binding of ligands, which modulate ASIC activation and desensitization and to predict structures of new specifically acting pharmacological agents. In the present work we performed in docking of a series of ligands, which stabilize open or closed state of ASIC1a. For the first time we revealed a correlation between the spatial ligand structure and its mode of action. We revealed specific interactions of these inhibitors and potentiators with amino-acid residues in the acidic pocket of ASIC1a. The results allow predictive design of new drugs.
New data on the volcanism of the Central Chukotka segment of Okhotsk-Chukotka volcanogenic belt
Authors: Ganelin A. V. , Vatruchkina E. V. , Luchitskaya M. V.
Published: May 2019

The article presents new geochronological and geochemical data on the age and composition of the undifferentiated Cretaceous volcanics of the basin of the Palyavaam river Central Chukotka region. These data indicate the heterogeneity of the rocks of etchikun suites, which are divided into two groups. The andesites of the first group (actually etchikun suites ) are of early Cretaceous age and represent a magmatic phase preceding the formation of the Okhotsk-Chukotka volcanogenic belt (OCHVB). The andesites of the second group correlate well in age and composition to the volcanic rocks of OCHVB. They lie at the base section of Chaunskaya series of OCHVB and indicate gomodromos the evolution of volcanism in the Central-Chukchi sector OCHVB.
Formation parameters of high-pressure minerals in the Dhofar 717 AND 864 chondrite meteorites
Authors: Litasov K. D. , Badyukov D. D. , Pokhilenko N. P.
Published: May 2019

This paper presents the results of a Raman spectroscopic study of shock melt veins in L6 chondritic meteorites Dhofar 717 and 864, and conclusions about the PT-parameters recorded in these meteorites after the impact event. The primary minerals of the host chondrite include olivine, orthopyroxene, clinopyroxene, plagioclase, chromite, phosphates, troilite, and kamasite. Shock melt veins up to 1 cm thick contain fragments of the high- pressure minerals ringwoodite, wadsleyite, majorite, akimotoite, jadeite, lingunite, and tuite and quenched melt consisting of majorite, ringwoodite, troilite, and kamasite. The mineral associations of the Dhofar 717 and 864 chondrites indicate high peak PT-parameters of the impact in the region of stability of majorite (>20 GPa and >2500 K) and bridgmanite (>25 GPa and >2500 K). The presence of lingunite also directly indicates a peak pressure in the area of stability of the bridgmanite.
The 100th anniversary of academician Boris Paton
Authors: Russian Academy of Sciences Herald
Published: May 2019

November 27, 2018, marked the 100th birth anniversary of an outstanding scientist, Boris Ye. Paton, a permanent president of the National Academy of Sciences of Ukraine since 1962, an initiator and the president for several years of the International Association of Academies of Sciences, the world-renowned specialist in the field of metallurgy and metal technology, the author of more than 1000 publications, and the founder and the head of a major scientific school. On his birthday, a meeting of the Presidium of the Russian Academy of Sciences was held, and the ceremony was conducted in absentia of B.Ye. Paton, who has always been and remains a permanent friend and admirer of the Russian Academy of Sciences. Here we present a review of speeches at the meeting of Russian colleagues, close associates of B.Ye. Paton, who gathered to mark the remarkable anniversary of an outstanding man and a scientist, an excellent organizer of science.
Science without borders: Siberian experience
Authors: Molodin V. I. , Yermikov V. D.
Published: May 2019

Today, Russian science has every chance of reaching a qualitatively new stage of development, which, perhaps, is impossible without an active international component. Thus, it would be appropriate to recapitulate the experience of the successful scientific collaboration of the institutes of the Siberian Branch of the Russian Academy of Sciences with organizations of Western countries at the turn of the century, the most difficult years of the systemic crisis in our country, which can be used under present conditions.
Adaptation as the principal technology for the development of subarctic territories of Russia
Authors: Osipov V. I. , Aksyutin O. E. , Ishkov A. G. , Grachev V. A. , Sergeev D. O.
Published: May 2019

Warming of the Earth’s climate necessitates the adaptation of human economic activities to these changes, especially in regions of permafrost soil (PS). This study proposes adaptation as an effective mechanism for environmental management, enabling the preservation of nature and concurrently increasing the resistance and immunity of the infrastructure to climate change. The adaptive model of the economic development of subarctic territories encompasses the implementation of a series of sequential measures based on the comprehensive knowledge of the laws of the cryosphere development, estimating temperature variations, and the state of the PS. This study provides examples of the use of adaptation technologies in unraveling economic issues in the subarctic zone of Russia.
Life is a relentless creativity. On the 100th anniversary of the birth of academician N.A. Semikhatov
Authors: Belsky L. N. , Gorkunov E. S. , Deryugin S. F. , Lukin N. A.
Published: May 2019

This study introduces the milestones of academician N.A. Semikhatov, an outstanding scientist and designer, who substantially contributed to the creation of our country’s nuclear shield, including ballistic missiles, for the world’s most potent nuclear submarines, Typhoon, are equipped with control systems developed under his leadership. Semikhatov focused on the training of scientific and engineering personnel, headed the department of radio engineering faculty of the Ural Polytechnic Institute for over 20 years, was one of the initiators of the Institute of Machine Science of the Ural Branch of the Russian Academy of Sciences, where he later worked as a permanent member of the Joint Scientific Council on Mathematics, Mechanics, and Computer Science at the Institute of Mathematics and Mechanics, and a member of the Presidium of the Ural Branch of the Russian Academy of Sciences. Of note, this study was also drafted using the memories of his colleagues, relatives, and friends.