bluuebunny/crossref_metadata_2025 huggingface dataset:
Islands of the upper River Ob: morphometric characteristic, evolution and dynamics
Authors: Golubtsov G. B. , Chalov R. S.
Published: May 2019

The studied reach of the upper River Ob is quite complicated in the morphological aspect and characterized by very low channel stability and high discharge of sand load. Unconstrained conditions for lateral channel migration promotes active channel deformations not only at long-term scale, but also seasonally. Channel deformations contribute to the transformation of the channel and its morphodynamic type in time. The upper River Ob is intensively used as a water course, so any reorganization of the channel and river islands should be taken into account to support navigation.

Morphometric and morphodynamic analysis of the islands made it possible to develop their morphological classification. Morphometric parameters of islands, being associated with the characteristics of the channel itself, are one of the main classification features. Empirical relations were obtained that link the dimensions (Lo, Bo) and shape of islands (Lo/Bo) with the morphodynamic channel type and its stability, the degree of branching of the channel (number of islands no per 1 km of channel length x). The features of island dynamics are also determined by the morphodynamic type of the channel and are associated with the morphometric characteristics of the islands themselves and their position in the channel, which determines the transgressive, regressive and transverse shift or their stable position in time.
Synthesis of Ni nanoparticles with controlled pyrophoricity and mean size
Authors: Alymov M. I. , Rubtsov N. M. , Seplyarsky B. S. , Zelensky V. A. , Ankudinov A. B. , Kovalev I. D. , Kochetkov R. A. , Shchukin A. S. , Petrov E. V. , Kochetov N. A.
Published: May 2019

This study establishes that nickel formate decomposition in an argon flow at 209°C and subsequent processing of the obtained nanopowder in a hydrogen flow within a specified time interval, make it possible to control the pyrophoricity and average size of Ni particles.
Local source of detritus for the rocks of the Ai formation (a basal level of the strata-typical lower Riphean sequence, the Bashkir uplift, the Southern Urals) derived from results of U–Pb dating (LA—ICP—MS) of detrital zircons
Authors: Romanyuk T. V. , Kuznetsov N. B. , Puchkov V. N. , Sergeeva N. D. , Powerman V. I. , Gorozhanin V. M. , Gorozhanina E. N.
Published: May 2019

This study presents the results of U–Pb dating of detrital zircons separated from rocks of the Ai formation. A provenance-signal of local source with an age of approximately 2.07 Ga is derived and an effect of the Ordovician magmatic episode impact on the sedimentary strata is revealed.
First find of the dromaeosauridae (dinosauria: dromaeosauridae) ungual from the late cretaceous Blagoveschensk dinosaur locality (Amur Region, Russia)
Authors: Bolotsky I. Yu. , Bolotsky Yu. L. , Sorokin A. P.
Published: May 2019

Dromaeosaurid ungual from the Blagoveschensk locality studied for the first time. Dromaeosaurid presence amongst other taxa points on high biodiversity in Amur region, on the eve of K-T event.
The first data on the n-isotopic composition of the Permian and Triassic of North-Eastern Russia and their significance for palaeotemperature reconstructions
Authors: Zakharov Y. D. , Biakov A. S. , Horacek M. , Goryachev N. A. , Vedernikov I. L.
Published: May 2019

It is proposed that oscillating temperature conditions in the late Wuchiapingian and early Changhsingian (Late Permian) followed in the Boreal Superrealm to less variable climatic conditions in the late Changhsingian and early Induan (the time of trap formation of the Siberian Platform), with stable trend of increasing temperature in the Early Triassic. The Problem of the absence of signs of mass extinction of marine organisms at the Permian-Triassic boundary in the Boreal Superrealm is discussed.
The novel dipeptide ligand of TASP
Authors: Deeva O. A. , Pantileev A. S. , Rybina I. V. , Yarkova M. A. , Gudasheva T. A. , Seredenin S. B.
Published: May 2019

Using the previously obtained first dipeptide ligand TSPO the N‑carbobenzoxy-L‑tryptophanyl-L‑isoleucine amide (GD‑23) as a basis, the new dipeptide was synthesized — the N‑phenylpropionyl–L‑tryptophanyl-L‑leucine amide (GD‑102). GD‑102 expressed anxiolytic activity in the open field test in BALB/c mice and in the elevated plus maze test in ICR mice. The minimum effective dose of GD‑102 was an order of magnitude lower than that of GD‑23. Preliminary administration of the TSPO selective antagonist, compound PK11195, completely blocked the anxiolytic activity of GD‑102, that indicated the participation of TSPO in the realization of the anxiolytic action GD‑102. The results were confirmed by molecular docking data.
Expansion of solutions to an ordinary differential equation into transseries
Authors: Bruno A. D.
Published: May 2019

We consider a polynomial ODE of the order n in a neighbourhood of zero or of infinity of the independent variable. A method of calculation of its solutions in the form of power series and an exponential addition, which contains one more power series, was described. The exponential addition has an arbitrary constant, exists in some set E1 of sectors of the complex plane and can be found from a solution to an ODE of the order n - 1. An hierarchic sequence of such exponential additions is possible, that each of these exponential additions is defined from an ODE of a lower order n - i and exists in its own set Ei. Here we must check the non-emptiness of intersection of the sets E1 Ç ... Ç Ei. Each exponential addition continues into its own exponential expansion, containing countable set of power series. As a result we obtain an expansion of a solution into a transseries, containing countable set of power series, all of which are summable. The transseries describes families of solutions to the initial ODE in some set of sectors of the complex plane.
Qualitative analysis of the undesirable effect of loss of traction force of a vehicle during an intense start
Authors: Reshmin S. A.
Published: May 2019

The effect of a significant and sharp loss of the average traction force during vehicle acceleration with asymmetric or asynchronous vibrations of the driving wheels is found. The effect manifests itself in vehicles with an inter- wheel differential under an intensive start with slipping. The vibrational modes leading to both partial and almost complete loss of the average traction force are specified. It can be dangerous when entering highways or crossing unregulated intersections.
New metal-oxide composite materials as efficient catalysts of the partial oxidation of methane
Authors: Dedov A. G. , Slyakhtin O. A. , Loktev A. S. , Mazo G. N. , Malyshev S. A. , Moiseev I. I.
Published: May 2019

Single-phase complex oxides Nd2-yCayCoxNi1-xO4 have been synthesized for the first time. Composites prepared by the reduction of these compounds with hydrogen and containing Nd2O3, CaO, and cobalt and nickels metals have been used for the first time as catalysts of the partial oxidation of methane. The maximal methane conversions (97%) and syngas yields (96%) at 900 °С have been detected in the presence of the composite obtained from Nd1,5Ca0,5NiO4. At T < 850 °C, the nickel–cobalt composite synthesized from Nd1,3Ca0,7Co0,4Ni0,6O4 turned out to be more selective in the formation of syngas. Decreasing the partial oxidation temperature from 900 °С to 750 °С leads to the oxidation of metallic nickel and cobalt to oxides and to partial resynthesis of complex oxides with perovskite and K2NiF4 structures. The observed differences in temperature dependence of the catalytic properties of composites with various Ni/Co ratios can be associated with the participation of complex oxides in catalysis of the partial oxidation of methane at low temperatures.
Features of haloalkane effect on the concentration limits and induction time for the ignition of methane–oxygen mixtures
Authors: Drakon A. V. , Eremin A. V. , Azatyan V. V.
Published: May 2019

A strong difference in the character of admixture effect on ignition by shock wave and spark initiation has been revealed using the haloalkane effect on the ignition of methane–oxygen mixtures as an example. It has been shown that the difference is determined by the presence of considerable concentrations of reactive intermediate species in an initial mixture, the qualitative difference in gas heating modes, and the strong difference between the temperature ranges of the process for two these methods.
Disjunctive dislocations of the upper crust of Tien Shan
Authors: Burtman V. S.
Published: May 2019

This paper analyzes the rose diagrams of the directions of 439 faults of the Variscian province, 476 faults of the Caledonian province, and 603 presently active faults of Tien Shan. It is shown that more than half of the faults of the Caledonian province of Tien Shan are a result of Late Paleozoic orogenesis, which spanned its entire territory. Our data indicate that seismic events of Tien Shan have resulted in no formation of new disjunctive dislocation in many cases exhibiting displacements along Paleozoic faults.
Sources and provenances for the Late Cenozoic sands of the Olhon Island (Baikal rift zone)
Authors: Kotov А. B. , Skovitina T. M. , Kovach V. P. , Sklyarov E. V. , Donskaya T. V. , Lopatin D. V. , Plotkina Yu. V. , Tolmacheva E. V. , Gorokhovskii B. M. , Buchnev I. N.
Published: May 2019

U–Th–Pb geochronological (LA-ICP-MS) stady the detritе zircons from the Late Cainozoic sands of the Olkhon island (the Baikal rift zone) were performed. It is shown that the early Paleozoic magmatic and metamorphic complexes of the Olkhon terrein of the Central Asian Mobile Belt and the Late Carbonian – the Early Permian granitoids of the Angaro-Vitimsky batholith were the main their sources. Transfer of granitoids of the Angaro- Vitimsky batholith were the main their sources. Transfer of the last was carried out on distance not less than 100 km. The assumption is made that it happened by powerful air transfer, and including on ice of Baikal Lake.
Postcollisional granitoids and aptian-albian extension in tectonic evolution of Chukotka mesozoides, Northeast Russia
Authors: Luchitskaya M. V. , Sokolov S. D. , Verzhbitsky V. E. , Vatrushkina E. V. , Ganelin A. V. , Golionko B. G.
Published: May 2019

New U–Pb SIMS zircon datings from granitoid plutons and dikes of Western Chukotka together with earlier obtained data confirm that postcollisional granitoid magmatism and dike intrusion occurred in Aptian–Albian (117–105 m.y.) and fix change of tectonic regime from collision to extension in tectonic evolution of Chukotka Mesozoides. These events may be related to continuing expansion of Amerasian basin since Jurassic and forma- tion in Aptian—Albian time of both oceanic Makarov, Podvodnikov basins and Anakhurgen, Nutesyn and Kameshkov basins in continental framework of Eastern Arctic. Synchronism of tectonic events of extension and spreading in the Canada Basin and collisional events, deformations and reorganization of structural style and sedimentary environment in the South-Anyui suture is noted. This may be regarded as confirmation of rotation hypothesis of Amerasian Basin formation.
Theory of filtration in a double porosity medium
Authors: Lobkovskiy L. I. , Ramazanov M. M.
Published: May 2019

This paper defines a generalized mathematical model of filtration in a double porosity medium, taking into ac- count recent ideas on liquid and gas flow in rocks with an anomalously low permeability (including nanoporous rocks). The obtained generalized equation takes into consideration, in contrast to the classical model, the integral effects of direct filtration of an energy (or heat) carrier in low-permeable inclusions. The laws of gas flow variations at the discharge point are compared with the classical double porosity model and with the Boussinesq– Leibenzon model.
A novel PRE-element from Drosophila virilis genome as a useful model silencer
Authors: Chetverina D. A. , Mikhailova A. V. , Georgiev P. G. , Erokhin M. M.
Published: May 2019

We tested the activity of the PRE element from the Drosophila virilis genome, which is the homologue of the known Drosophila melanogaster bxdPRE element from the regulatory region of the Ubx gene. It is easy to select unique primers to this element that do not occur in the Drosophila melanogaster genome. We showed that the studied PRE element causes a strong repression of the white marker gene upon insertion into the Drosophila melanogaster genome and interacts with the PcG proteins of the PRC1 and PhoRC complexes.
Mechanism of formation of Prandtl’s secondary flows of the second kind
Authors: Nikitin N. V. , Pimanov V. O. , Popelenskaya N. V.
Published: May 2019

Turbulent flow in a tube of square cross section is investigated numerically. The concentrated longitudinal vortices responsible for the occurrence of secondary flows are studied. It is shown that the longitudinal vortices are formed as a result of nonlinear interaction of turbulent pulsations in which the pulsations of the longitudinal component of vorticity are specially adjusted in phase with the pulsations of the longitudinalvelocity component. A physical interpretation of this mechanism is given.
Synthesis and self-assembling amphiphilic diblock-copolymers of (2,3,4,5,6)-pentafluorostyrene
Authors: Chekurov K. E. , Barabanova A. I. , Blagodatskikh I. V. , Lokshin B. V. , Peregudov A. S. , Abramchuk S. S. , Khokhlov A. R.
Published: May 2019

Amphiphilic diblock-copolymers (DC) of (2,3,4,5,6)-pentafluorostyrene and 2-hydroxyethyl methacrylate were prepared for the first time by two-step reversible addition–fragmentation chain transfer (RAFT) polymerization. The morphology of films of diblock-copolymers that have a composition close to equimolar was studied by transmission electron microscopy. The observed microphase separation and formation of spherical nanodomains is not typical for equimolar diblock-copolymers and seems to result from hydrogen bonding between the hydroxyl and carbonyl groups (OH···OH and C=O···HO) in poly(2-hydroxyethyl methacrylate) blocks. Obviously, it is the ability of diblock-copolymers to self-organization is the cause of formation of fabric coatings with low surface energy (γ = 11.9 mJ/m2) and relatively large water contact angles (θН2О = 120±6°) and diiodmetane (θCH2I2 = 93±2°).
Electronically mediated reactions in metal thermal reduction of molybdenum and tungsten oxide compounds
Authors: Kolosov V. N. , Orlov V. M.
Published: May 2019

The reduction of tungsten and molybdenum oxide compounds (WO3, MoO3, MgWO4, MgMoO4, and CaMoO4) with calcium vapor at 800–860°С and a residual argon pressure of 5–10 kPa in reactor have been studied. As previously during the reduction with magnesium vapor, the spatial separation of the reaction products was observed, namely, the major portion of the calcium oxide formed in the reaction was deposited outside the reaction zone. A specific feature of the reduction of MgWO4 and MgMoO4 is that the magnesium is first replaced by calcium. The resulting magnesium metal acts as a reducing agent, and the magnesium oxide, along with calcium oxide, forms a crust on the surface of the reaction mass. Analysis of the results shows that the reduction of oxide compounds with magnesium and calcium vapors at a residual argon pressure in reactor of more than 5 kPa proceeds via the electronically mediated reaction mechanism without direct physical contact between the reactants.
Early Cambrian age and crustal source of granitoids of the Goryachinsky pluton (North Baikal area): geodynamic implications
Authors: Rytsk E. Yu. , Sal'nikova E. B. , Yarmolyuk V. V. , Andreev A. A. , Bogomolov E. S. , Lebedeva Yu. M. , Velikoslavinskii S. D. , Anisimova I. V. , Plotkina Yu. V. , Fedoseenko A. M.
Published: May 2019

The article presents the results of U-Pb in zircon and Nd-isotope study of the adakite granites of the Goryachinsky pluton, exposed along the Baikal coast in the section of termination of the package of shear tectonic plates of the Baikal-Muya belt. The Early Cambrian age of granitoids, which is unusual for the Northern Baikal region, is 545 ± 6 Ma. According to the authors, new geological and isotopic data indicate the formation of the studied granitoids at the final stage of the Late Baikal shear tectogenesis, which caused the manifestation of adakite magmatism within the Baikal-Muya belt.
A disproof of the zero-one law for existential monadic second order properties of sparse binomial random graphs
Authors: Egorova A. N. , Zhukovskii M. E.
Published: May 2019

We construct existential monadic second order sentences that have no limit probabilities on binomial sparse random graph G(n; n–α) . For α < , the constructions have only one monadic variable.
On the formation of structures in nonlinear problems of physical kinetics
Authors: Betelin V. B. , Galkin V. A.
Published: May 2019

A number of phenomena associated with the formation of macroscopic structures due to the high interaction intensity of elements of spatially homogeneous systems and due to linear spatial transport in spatially inhomogeneous systems are addressed. A characteristic feature of the considered class of problems is the violation of the continuity of the operators describing the evolution of a system in natural norms determined by local conservation relations.
Large deformations of a cylindrical tube with prestressed coatings
Authors: Zubov L. M.
Published: May 2019

The problem of large deformations in a combined nonlinear elastic hollow cylinder under internal and external pressures, loaded with a longitudinal force and torque at the end faces, is under consideration. The combined cylinder is a tube with the internal and external coatings in the form of prestressed hollow circular cylinders. An exact solution to the problem is found, which is valid for any model of isotropic incompressible elastic materials.
Large deformations of a cylindrical tube with prestressed coatings
Authors: Kulchin Yu. N. , Ragozina V. E. , Dudko O. V.
Published: May 2019

General theoretical relations for calculating the redistribution of the preliminary irreversible strain field during unloading or elastic loading of a medium are obtained for the nonlinear multiplicative gradient model of large elastic-plastic deformations. It is shown that the dynamics of elastic shock waves does not depend directly on the previously accumulated plastic strains. A formula for the plastic-strain rotation tensor is obtained. It is shown that rigid rotation of plastic strains under elastic shock waves can be jump-like. All results are obtained for the general case of model relations of isotropic media and are valid for both compressible and incompressible materials.
MHD effects in continuous spin detonation
Authors: Popov E. L. , Samsonov A. N. , Bykovskii F. A. , Vedernikov E. F.
Published: May 2019

Conversion possibility of the chemical energy of combustion products of a hydrogen–oxygen mixture into electrical energy with the use of continuous spin detonation has been demonstrated for the first time in an MHD system. The specific conductivity of detonation products in the region of rotation of the detonation front was measured to be ~3 · 10–2 Ω–1 m–1. The structure of transverse detonation waves was examined, their velocity was measured (2220 ± 50 m/s), and the flow in their vicinity was studied.
The distribution of Nb and Ce betweet two immiscible melts in the system CePO4–SiO2–NaF–Fe2O3–Nb2O5
Authors: Delitsyn L. M.
Published: May 2019

The CePO4 – SiO2 – NaF – Fe2O3–Nb2O5 system is characterized by a wide area of two immiscible melts. As the temperature in the system increases, the region of incompressibility of melts increases. Mutual solubility of immiscible melts is low and is 3–5% by weight. The decrease in the melting point of the components is due to chemical reactions between SiO2 and NaF and between cerium orthophosphate and sodium fluoride. New previously unknown phases were established in the system: double salt of cerium and sodium, fluoride phosphate of cerium and sodium and phase with high content of niobium. Niobium oxide is distributed between the silicate melt, silicate balls, which is part of the phosphate fluoride melt and a phase with a high content of niobium. Cerium is concentrated in the phosphate-salt melt, where it is found in the double salt of cerium and sodium and the fluoride phosphate of cerium and sodium.
Origin of hydrocarbons in suspended matter and bottom sediments near the Crimean peninsula
Authors: Nemirovskaya I. A. , Oneginа V. D. , Lisitzin A. P. , Konovalov B. V.
Published: May 2019

It was established that the content of hydrocarbons in the surface waters of the Feodosia Gulf fluctuated were varied a wide range (11–179 μg/l), and exceeded the MPC values for petroleum hydrocarbons in individual samples. The highest concentrations were observed in 2016. The composition of alkanes suggested their mixed (autochthonous and allochthonous) origin. The weathered petroleum hydrocarbons have been identified only in a few cases. In bottom sediments, the concentrations of hydrocarbons depended on their grain size distribution, and terrigenous alkanes were dominated in their composition. The oil and pyrogenic hydrocarbons’ pollution were established based on the composition of polycyclic aromatic hydrocarbons. In the open part of the Black Sea, southward the Crimean peninsula, the hydrocarbon content in surface waters and bottom sediments were at the level of background concentrations, and homologs of terrigenous origin dominated in their composition.
Features of the fossil tidal bulge formation for the early moon
Authors: Voropaev S. A. , Dnestrovskii A. Yu. , Marov M. Ya.
Published: May 2019

The limitations imposed on the orbit and the distribution of the density of the early Moon by present-day measurements of its fossil tidal bulge are studied. A semi-analytical method has been developed for calculating gravitational potentials, which makes it possible to investigate the equi-potential surfaces of a self gravitating inhomogeneous mass in an external field. Universal expressions are obtained for the two-layer mantle-crust model of the early Moon, which makes it possible to make general estimates of the density of the upper crust and semiaxes of its orbit in the case of tidal capture by the Earth.
Paleoproterozoic age of carbonates and trondhjemites of the central azov group: Sr-isotope chemostratigraphy and U-Pb geochronology
Authors: Kuznetsov A. B. , Lobach-Zhuchenko S. B. , Kaulina T. V. , Konstantinova G. V.
Published: May 2019

The Sr-isotope composition of the Central Azov Group carbonates (0.70322-0.70352) and Nd model age of silicate sediments (2.34-2.31 Ga) has been reported. The U-Pb age of trondhjemite (2052+5 Ma) cutting the carbonates has been determined. According to the obtained data, the marine sedimentary cover of the Azov block making up the Early Precambrian Sarmatia Continent emplaced in the Early Paleoproterozoic at 2.23-2.34 Ga.
Content and balance of endogenous brassinosteroids in potato microclones is determined by the organ specificity and term of ripening variety
Authors: Efimova M. V. , Litvinovskaya R. P. , Medvedeva Yu. V. , Murgan O. K. , Sauchuk A. L. , Kuznetsov V. V. , Khripach V. A.
Published: May 2019

The endogenous brassinosteroids content in the roots and shoots of early- and mid-season potato microclones was determined. Among the analyzed plant steroid hormones were representatives of brassinolide group, 24-epi- brassinolide group, 28-homobrassinolide group, B-lactones and B-ketons. The level of all brassinosteroids in plant roots exceeded significantly that in shoots, irrespective of the potato term of ripening. Of interest is the fact that in plant shoots there were no BS groups of 24-epibrassinolide. We have first found a relationship between the terms of potato ripening and endogenous content of different BS groups in the aerial and underground plant parts; we have also assessed the age-related changes in the content of BSs, as well as their ratio in the potato plants of the Red Scarlett variety.
Changing of body proportion during growth in hydrothermal vestimentiferan Oasisia alvinae Jones 1985 (Annelida, Siboglinidae)
Authors: Karaseva N. P. , Rimskaya-Korsakova N. N. , Gantsevich M. M. , Malakhov V. V.
Published: May 2019

During the growth of hydrothermal vestimentiferan Oasisia alvinae the trunk part of body was found to be elongated (from 51 to 83.4% of the overall body length), while the relative dimensions of all other body regions decreased. This was related to the enhanced trophosome and gonad development in the trunk part. We suppose that predominant trunk growth is a common feature of all vestimentiferans.
2-factor Newton method for solving the constrained optimization problem with the singular Kuhn—Tucker system
Authors: Evtushenko Yu. G. , Tret’yakov A. A.
Published: May 2019

A new method for solving the inequality constrained optimization problem is proposed for the case when the system of necessary optimality conditions of Kuhn—Tucker is degenerate. This situation occurs for example in the case when strict complementarity conditions fails in solution point. The reduction of the inequalities con- strained optimization problem to the equalities constrained problem is substantiated and the use of a new 2-fac- tor Newton method for the effective solution of the obtained degenerate system of optimality conditions is shown.
A lowpass filter based on a 2d microstrip electromagnetic crystal
Authors: Belyaev B. A. , Khodenkov S. A. , Galeev R. G. , Shabanov V. F.
Published: May 2019

A new construction of a lowpass filter was developed based on a two-dimensional microstrip electromagnetic crystal, which had a steeper slope of the frequency response as compared to a filter consisting of a one-dimensional microstrip electromagnetic crystal. The investigated lowpass filter construction is characterized by a high workability and ease of manufacturing. Electrodynamic numerical simulation of the 3D model of the considered microstrip structure agrees well with the experiment, which allows conducting parametric synthesis of devices with the required properties using a personal computer.
Lithology, biostratigraphy, and geochronology of the late pleistocene-holocene sediments on the coast of Onega bay of the White sea
Authors: Kolka V. V. , Korsakova O. P. , Lavrova N. B. , Shelekhova T. S. , Zaretskaya N. E.
Published: May 2019

This paper reports on the lithological, micropaleontological, and chronometric data (radiocarbon dating) for one of the areas of the White Sea coast. The sedimentary sequences were studied in the current lake basins, which were separated from the large basin at different times. The basin was situated in the head of the current Onega Bay. On the basis of these data, the bottom sediments were stratified and the Late Pleistocene-Holocene paleogeographic settings were reconstructed for the southeastern part of Onega Bay.
Homogenization of the boundary value problem for the poisson equation with rapidly oscillating nonlinear boundary conditions: space dimension n ≥ 3, critical case
Authors: Podolskiy A. V. , Shaposhnikova T. A.
Published: May 2019

The homogenization of the Poisson equation in a bounded domain with rapidly oscillating boundary conditions specied on a part of the domain boundary is studied. A Neumann boundary condition alternates with an ε-periodically distributed nonlinear Robin condition involving the coefficient ε-β, where β ∈ R. The diameter of the boundary portions with a nonlinear Robin condition is of order O(εα), α > 1. A critical relation between the parameters α and β is considered
Unstable necking due to deformation softening of polybutylene succinate
Authors: Kechek'yan A. S. , Bazhenov S. L. , Monakhova K. S.
Published: May 2019

Self-oscillating neck propagation of amorphous polybutylene succinate was studied. The neck propagated by regular neck front jumps at the stretching speeds from 0.05 to 1000 mm/min. Self-oscillations at extremely low stretching speeds contradicts to the theory of this phenomenon. The instability of the neck propagation was explained by the deformation softening of the polymer.
The crisis in economics – nature and ways to overcome it
Authors: Nekipelov A. D.
Published: May 2019

Recent decades have witnessed an upsurge in multiple alternative approaches to unraveling major economic problems, together with the mainstream economic theory, which in this study has been considered an indicator of economic crisis. In this study, we attribute institutional stasis, as well as methodological heterogeneity of its two constituent sections, micro- and macroeconomics, to the primary drawbacks of neoclassical economic theory. Overcoming the crisis of economic science correlates with the creation of a general economic theory on the principles of “pure science,” with elucidated functions of various socioeconomic disciplines. If “pure economic theory” intends to form an intellectual layout of the economic system, then the “realistic sciences,” also including modern macroeconomics in this study, are tools for analyzing specific socioeconomic phenomena and processes. As people with consciousness and interests act in the society, this study postulates the existence of a certain zone of ambiguity, which cannot be entirely covered.
Present geoecological transformations in the Kerch strait ecosystem
Authors: Fashchuk D. Ya. , Terentyev A. S. , Kovalchuk S. K. , Kucheruk N. V.
Published: May 2019

This study examined the distribution, structure, and dynamics of bottom communities of macrozoobenthos in the Kerch Strait based on an analysis of literature sources from 1934 and 1955, archival data documenting hydrobiological field investigations of the Southern Research Institute of Marine Fishery and Oceanography (YugNIRO, Kerch) in 1986 and 1989, and results of the joint Russian-Ukrainian benthic survey of the Kerch Strait (47 stations) conducted by the Institute of Geography of RAS and YugNIRO in the summer of 2010. It was found that populations of filter-seston feeding bivalves in the strait ecosystem have degraded over the past 75 years, whereas populations of detritus-feeding polychaetes preferring muddy bottoms have become much more abundant. Researchers identified species of bottom animals and strait areas exhibiting maximum changes. An analysis of the dynamics of bottom sediment structure in the strait based on YugNIRO archival data and the results of a 2008 diving survey conducted by the Institute of Geography of RAS (49 divers) demonstrated that the observed transformations are associated with silting of a considerable part of the strait bottom as a result of both earlier and more recent economic activities, particularly the disposal of dredging grounds from 1960 to 1990 and the construction of the Tuzla Dam in 2003, respectively. However, the character of the fixed transformations does not enable us to identify the specified reasons as the sole causes of the changes; therefore, the authors also consider hypotheses explaining other mechanisms. The authors conclude that further research on geoecological dynamics of the Kerch Strait ecosystem is needed, particularly after the construction of the Crimean Bridge.
How to reorganize computer science and technologies?
Authors: Iliin V. P.
Published: May 2019

The fundamentals of modern progress are based on the infinite growth rates of the computational and informational capacities of a post-petaflop scale, which provide unthinkable opportunities for acquiring new knowledge and introducing innovation into production, environmental management, and the economic and social spheres. The key method here is based upon the predictive mathematical modeling of processes and phenomena, including theoretical and applied research, super-computations and large-scale computer experiments, operations with mega-data sets, and artificial intelligence. The solution to emerging supertasks requires huge amounts of new generation intelligent software, which is impossible without the formation of new concepts and paradigms of activity, architectural solutions, and constructive technologies. The world is embracing the creation of integrated computing and information environments, forming an instrumental context for automating the construction of models and algorithms, their mapping onto supercomputer platforms, and the creation of comfortable interfaces for users with different professional backgrounds. Such an ecosystem is designed for a long life cycle with continuous development and the coordinated participation of various groups of developers, as well as widespread demand. In fact, this is leading to the formation of a new industry with mass professions requiring high supercomputer literacy. The identified scientific and technological challenges require competent organizational and infrastructural solutions, including the interdepartmental coordination of academic, educational, and production teams
Priority of scientific and technological development "The transition to an environmentally friendly and resource-saving energy, increasing the efficiency of extraction and deep processing of hydrocarbons, the formation of new sources, methods of transportation and storage of energy". Opening speech of the chairman of the priority council of RAS academician V.E. Fortov
Authors: Fortov V. E.
Published: May 2019

Opening speech of the chairman of the priority council of RAS academician V.E. Fortov
Priority of scientific and technological development "The transition to advanced digital, intelligent manufacturing technologies, robotic systems, new materials and methods of design, the creation of systems for processing large amounts of data, machine learning and artificial intelligence". Opening speech of the chairman of the priority council of RAS academician I.A. Kalyaev
Authors: Kalyaev I. A.
Published: May 2019

Opening speech of the chairman of the priority council of RAS academician I.A. Kalyaev
Development of a technological platfom for creating innovative anti-tb drugs effective against multi-drug-resistant strains
Authors: Danilenko V. N.
Published: May 2019

This article tackles the issue of the growing morbidity and mortality caused by multi-drug-resistant (extreme drug-resistant) tuberculosis (TB). This issue is aggravated by the alarming rise of immunocompromized patients and immigration worldwide. In order to solve this problem, an interdisciplinary approach is needed. Here we offer to: (1) develop innovative diagnostic techniques for identifying dangerous lineages of TB with mutations and drug resistance genes; (2) develop antibiotics with new modes of action effective against multiple drug resistance and extreme drug-resistant strains of TB and HIV; (3) develop new genetically engineered vaccines; and, (4) develop new vaccine adjuvants based on probiotic Lactobacillus and Bifidobacterium stains, with selective immunomodulatory activity.
Speech of academician of RAS V.G. Akimkin
Authors: Akimkin V. G.
Published: May 2019

Speech of academician of RAS V.G. Akimkin
Artificial intelligence and some issues of Russian security provision
Authors: Kokoshin A. A.
Published: May 2019

Some cases of using Artificial Intelligence systems are analyzed in order to give reliable warning and optimal response to man-made and natural emergencies. The author considers the set of tasks of information and cyber security, of increasing the combat capability of the armed forces.
Speech of the doctor of engineering sciences A.B. Sivenkov
Authors: Sivenkov A. B.
Published: May 2019

Speech of the doctor of engineering sciences A.B. Sivenkov
Providing territorial connectivity of russian federation with usage of Earth’s remote sensing
Authors: Lutovinov A. A. , Lupyan E. A. , Pogosyan M. A. , Shemyakov A. O.
Published: May 2019

The authors presented a description, scientific and technical tasks, and development prospects of the System of objective remote monitoring of facilities and resources in Russia. The main task of such a system is to obtain objective operational information for assessing the current state of regions, their resource potential, planning the development of the country, as well as objective monitoring of the realization of infrastructure projects. The proposed system can become an integral part of complex scientific and technological projects and programs aimed at solving the problems of connectedness of the territory of Russia.
Speech of the general director of the research and design institute for information technology, signaling and telecommunications in railway transportation, the Russian railways company, doctor of engineering I.N. Rosenberg
Authors: Розенберг И. Н.
Published: May 2019

Speech of the general director of the research and design institute for information technology, signaling and telecommunications in railway transportation, the Russian railways company, doctor of engineering I.N. Rosenberg
Speech of the head of the department of the president of the Russian Federation on scientific and educational policy I.P. Bilenkina
Authors: Bilenkina I. P.
Published: May 2019

Speech of the head of the department of the president of the Russian Federation on scientific and educational policy I.P. Bilenkina
Speeches of the participants of the scientific session of the general meeting of the RAS members
Authors: Scherbakov I. A. , Nigmatulin R. I. , Lebedev M. P. , Shutkov A. A. , Spartak A. N.
Published: May 2019

Speeches of the participants of the scientific session of the general meeting of the RAS members
Liquid immiscibility in fluid–magmatic systems: an experimental study
Authors: Kotelnikov A. R. , Suk N. I. , Kotelnikova Z. A. , Yanev Y. , Encheva S. , Ananiev V. V.
Published: May 2019

Liquid immiscibility was studied in melting experiments in the system trachyrhyolite–water + salt (NaF, Na2CO3) conducted at parameters imitating those of the volcanic process. The indicator components were La, Nb, Sr, W, Mo, Cr, Fe, Rb, and Cs. The experimental runs were carried out in a high gas pressure apparatus. At 1200oC and 5 kbar, melting, homogenization, and melt saturation with fluid components occurred. A decrease in the P-T parameters to 1000°C and 1 kbar led to the onset of liquid immiscibility in the form of droplets in the melt matrix. The composition of the droplets is similar to that of the melt matrix and differs from the latter only in concentrations of water, indicator components, and proportions of alkaline and alkali-earth elements. In the presence of salt (NaF), the melt exsolved into immiscible silicate and salt melts. No liquid immiscibility was detected when Na carbonate was added to the melt, but its agpaitic coefficient increased.
Migration of radiogenic helium in the crystal structure of sulfides and prospects of their isotopic dating
Authors: Yakubovich O. V. , Gedz A. M. , Vikentyev I. V. , Kotov A. V. , Gorokhovskii B. M.
Published: May 2019

The migration of helium from the crystal lattices of sulfides (pyrite, pyrrhotite, chalcopyrite, bornite, and sphalerite) and sulfosalts (tennantite and tetrahedrite) was studied. It was shown that helium occurs in submicrometer inclusions of uranium- and thorium-bearing minerals. The curves of helium thermal desorption from the sulfide and sulfosalts were obtained by the step-heating method and analyzed on the basis of the single-jump migration model. The interpretation of these data led to the conclusion on the possibility of the U-Th-He dating of pyrite. It was shown that the migration parameters of helium in the other sulfides and sulfosalts are not suitable for their potential use as U-Th-He mineral geochronometer. Based on a comparison of data on helium migration in various minerals, it was suggested that high helium retentivity in some sulfides and arsenides (pyrite and sperrylite) is related to the type of their crystal lattice, packing density, and specific electric resistivity.
Genesis of manganese ore occurrences of the Olkhon Terrane
Authors: Sklyarov E. V. , Lavrenchuk A. V. , Starikova A. E. , Fedorovskii V. S. , Khromova E. A.
Published: May 2019

Geological and mineralogical data are reported on the manganese occurrences of the Olkhon terrane (Western Baikal region), which are localized in metadolerites of the Ustkrestovsky Complex, high-temperature mafic hornfels, granites, calcitic marbles and calciphyres, and occasionally are developed as separate veins in gneiss granites or small lenses in quartzites. Most of them are made up of high-temperature mineral assemblages (Opx + Cpx + Pl + Ilm ± Grt± Bt ± Amp), the main manganese carriers in which are ferrorhodonite (33–36 wt % MnO), orthopyroxene (6–12 wt % MnO), and ilmenite (3–16 wt % MnO). Obtained data are in conflict with traditional concepts that these rocks are gondites (manganese-rich metamorphosed sediments) or that manganese flux in carbonate sediments was related to the volcanic activity that occurred simultaneously with sedimentation at about 500 Ma. The diversity of manganese occurrences was produced by metasomatic processes that occurred almost simultaneously with regional metamorphism and emplacement of subalkaline mafic bodies during collisional tectonogenesis (about 470 Ma).
Evolution of the isotopic-geochemical composition of rocks of Uksichan volcano, Sredinnyi range, Kamchatka, and its relations to the tectonic restyling of Kamchatka in the neogene
Authors: Davydova M. Yu. , Martynov Yu. A. , Perepelov A. B.
Published: May 2019

The paper presents newly acquired data on concentrations of major and trace elements and on Sr, Nd, and Pb isotope composition in Pliocene and Late Pleistocene–Holocene mafic volcanic rocks of the Uksichan volcanic center, one of the largest in the Sredinnyi Range of Kamchatka. Based on these data, the mafic Pliocene volcanics are thought to be produced by the melting of heterogenized mantle material, which had been hybridized by subduction and asthenospheric processes. The behavior of HFSE and Pb isotopic systematics provide evidence of the melting of subducted sediment and origin of pyroxenite segregations in the peridotite matrix. The low ∆8/4Pb values of the Pliocene lavas of Uksichan shield volcano and in modern large volcanic centers in the Central Kamchatka Depression are correlated with the magmatic productivity, which indicates, when considered together with HFSE and HREE behavior, that the Pacific asthenosphere was involved in the magma-generating processes. The Late Pleistocene–Holocene basalt volcanism, which was spatially constrained to the peripheries of the Pliocene shield edifice, developed in an extensional environment as a result of the melting of an enriched mantle source. The attenuation and then complete termination of volcanic activity in the Sredinnyi Range in the Late Pleistocene–Holocene was associated with an increase in the ∆8/4Pb of the mafic lavas, which indicates that the center of the activity related to the oceanic asthenosphere shifted eastward toward the Central Kamchatka Depression. The influence of the oceanic asthenosphere on subduction-related magmatism is not unique to convergence zones alone and should be taken into consideration when models are constructed for the origin of juvenile continental crust.
Middle–upper devonian terrigenous rocks of the Tsil’ma River basin and their palynological characteristics
Authors: Tel’nova O. P. , Shumilov I. Kh.
Published: May 2019

The results of biostratigraphic study of Givetian–Frasnian rocks of the Tsil’ma River basin (Middle Timan) are presented. The biostratigraphic division of the sections is based on palynological data: five palynocomplexes are distinguished in the Valsa, Tsil’ma, Ust’-Chirka, Ust’-Yarega, and Kraipol’e formations and are correlated with coeval palynocomplexes of adjacent of territories. The features of miospore associations from continental and coastal marine facies are identified. The clear cycle of origination of geological bodies corresponding to the formations is established at this territory.
Lectostratotype of maikopian group – Belaya River section upstream of Maikop town (Western Ciscaucasia) in the Oligocene part
Authors: Popov S. V. , Tabachnikova I. P. , Bannikov A. F. , Sychevskaya E. K. , Pinchuk T. N. , Akhmet’ev M. A. , Zaporozhets N. I. , Van der Boon А. , Krijgsman W. , Stolyarov А. S. , Krhovsky J.
Published: May 2019

Belaya River Section of Maikop deposits is the closest to the Maikop town, typical for Western and Central Ciscaucasus, well outcropped and studied and should be considered as a type section for the Maikop Group. Here it is possible to observe a continuous transition from the underlying light marls of Belaya Glina Formation to the dark clays of Pshekha Formation at the base of the Maikop succession. Pshekha Fm is characterized by nannoplankton NP21 and NP22 zones, dinocysts Phthanoperidinium amoenum (D13) and Wetzeliella symmetrica zones, mollusk association with Pterolucina batalpashinica at the bottom and rich fish fauna. The succession shows a normal polarity chron C13n for the base of the Pshekha and revers polarity C12r above.

Marl of Polbian Bed with brackish Lower Solenovian mollusks, ostracod association with Disopontocipris oligocaenica, nannoplankton of NP23 Zone and dinocysts of Wetzeliella gohtii Zone lies above with erosion contact. Overlying Lower Morozkina Balka Subformation contains from non-calcareous clays and concludes the remains of fish and dinocysts of Wetzeliella gohtii Zone. The Upper Morozkina Balka Subformation contains calcareous sublayers with nannoplankton NP23 Zone in lower part and NP24 one above, dinocysts Chiropteridium partispinatum Zone, Rhombodinium draco Subzone. Polarity pattern we interpret to correspond to C10n, C9r and C9n.

Batalpashinsk Formation corresponds to the time of maximum hydrogen sulfide contamination of the Late Oligocene basin and is dated by nannoplankton NP25 Zone, and dinocysts Chiropteridium patrispinatum Zone with Rhombodinium draco Subzone in lower part and Deflandrea spinulosa (non typica) Subzone in the middle and upper parts. Septarian+Zelenchuk Fm is composed of clays with septarian concretions, and interbedded sands with the same dinocysts and foraminifera with Spiroplectammina aff. terekensis. Calcareous interlayers in the top of the formation conclude nannoplankton of NP25-NN1 Zone. Karadzhalga Formation is composed mainly “fish lithofacies” and includes dinocysts zone Labyrinthodinium truncatum (Lower Miocene) in basal part.
Transformation of urban spatiotemporal systems, by the example of retail impact to large hosing estate areas of Leningrad—St. Petersburg, 1989—2016
Authors: Axenov K. E.
Published: May 2019

Using the example of retail development in the former socialist large housing estate areas of Leningrad—St. Petersburg in 1989—2016 the paper outlines and provides evidence for 3 principles of the spatiotemporal systems (STS) development under urban transformation: principle of essence changing during transformation of a STS; principle of joined-up nature of spatial, temporal and essence-based parameters of urban STS (USTS); possibility of mismatch of spatial, temporal and substantive hierarchies of transformational USTSs. Paper describes 6 stages of spatial development of retail during the studied period and corresponding spatial forms and peculiarities of retail STS spatial development: early transformation; first stage of administrative reform; pavilions and market places; specific transformational forms displacement; domination of large stationary trade forms; convenience shops stage. Corresponding spatial forms and specificities of retail STSs organization in former socialist large housing estate areas are characterized as well: kiosks and stand-alone-sellers agglomerations near metro stations and public transport stops; kiosks and pavilions agglomerations near metro stations plus market places; retail tents and other mobile trade forms near metro stations plus new market places; large shopping centers, stationary market places plus kiosk chains; hypermarkets, chained stationary shops, temporary agglomerations of mobile facilities near metro stations; convenience shops and illegal kiosks. Specific methodology of complex STSs research was developed and tested.