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A group of experts has studied and codified 160 scientific articles published in Russian from 2015 till 2020 that mention the Spatial Development Strategy of the Russian Federation (SDS). Each is defined and assigned to one of four groups: 1) with suggestions for the SDS (23% of the articles); 2) critical of the SDS with suggestions for it (19%); 3) purely critical of the SDS (18%); and 4) neutral or laudatory (40%). This study points out 22 thematic motifs, or themes, found in articles and related to the SDS semantic core. For each article, we have compiled a digital code vector that marks the theme’s presence (code 0) and the author’s critical demeanor toward its interpretation in the SDS: from code 1 (meaning “full support") to 5 (meaning “strong resentment"). The following themes have been addressed most often: 1) the need for the SDS as a state planning document. Its design requirements in terms of form, content, and the period of validity (90 articles); 2) goals, timetables, and resources for implementation (45); 3) macro-regions and their allocation principles (44); 4) agglomerations and their identification adequacy (43); 5) prospective effective specialization of regions (43); 6) tools and methods to implement the strategy (35). For all the themes, the number of critical statements is significantly larger than that of neutral or favorable references. The greatest resentment is shown toward the following: the principles of determining priorities; quantitative indicators of implementation; institutional conditions for implementation; geostrategic territories; peripheral and degrading territories; regional imbalances

The article provides a historical digression into the population census as the only tool that makes it possible to assess the current socio-economic and socio-demographic situation in a particular territory. The possible factors causing distrust and fear among the population that arise in the process of organizing and conducting this labor-intensive process are listed. Among them: legal support; methodological foundation; consciousness and responsibility of scribes; psychological attitude of respondents.

The paper presents the results of simulation and experimental study on the efficiency of selecting a pair of excitation lines of OH hydroxyl radical for the (1-0) transition for the A²Σ⁺-X²Π system for local temperature measurement in a hydrocarbon flame. The LASKIN software was used for the numerical simulation. The temperature field for a laminar methane-air premixed flame (with equivalence ratio equal 1.1) at the atmopsheric pressure was measured. Different combinations of literature-recommended pairs of excitation lines were considered. The results of numerical simulation agree with a theoretical dependency for the temperature range of 1200 - 2100 K for the coupled excitation lines Q₁(5):Q₁(14) and Q₁(5):Q₂(11). However, a moderate discrepancy is observed for the pairs R₂(2):R₂(13) and R₂(2):R₂(10). It is concluded that the coupled excitation of Q₁(5):Q₁(14) and R₂(2):R₂(13) lines provide a higher sensitivity to the temperature variation. The benefit of the latter pair is that these transitions correspond to close values of the excitation wavelengths in the vicinity of 282 nm. Therefore, this can be convenient for the arrangement of experiments.

Studies of hydrodynamics and heat exchange of an alcohol-water mixture during its circulation through a heated cylindrical channel are carried out. Non-azeotropic and azeotropic mixtures with a mass concentration of a volatile component of 22 and 95 %, respectively, are used as the working fluid. The experiments are realized at a pressure of 0.018-0.02 MPa. The working section is made of stainless-steel pipe with an outer diameter of 8 mm and a length of 4 m. For visual observation of the composition of the two-phase flow, an optical section installed behind the working section is used. Experiments show that the formation of a vapor phase during the circulation of a non-azeotropic mixture through a heated channel begins at a wall temperature below the equilibrium temperature of the mixture. The governing condition for vaporization is the excess of the wall temperature over the equilibrium temperature of the volatile component.

The study deals with unsteady heat transfer between a spherical encapsulated nanoparticle with a phase transition material as a core and the ambient medium. The calculations take into account the Kapitsa’s contact thermal resistance at the nanoparticle interface. It was demonstrated that this phenomenon can be critical for heat transfer in nanofluids.

The ability of snow cover to accumulate airborne substances allows to analyze spatiotemporal geochemical patterns and to detect polluted areas. Spatial features of geochemical regional distribution of dust deposited in the snow cover in areas remote from industrial centers were identified. The snow cover of Tomsk, Shegarka and Kozhevnikovo districts of the Tomsk region was chosen to be the object of the research. The observations were carried out in the period from 1995 to 2000. The measurements of melt snow filtrate included: pH, concentrations of nitrate and ammonia nitrogen, phosphorus, potassium, calcium, magnesium, sodium, chlorine, while the solid residue was analyzed for heavy metal contents (Cu, Zn, Cd, Pb, Co, Mn, Cr, Ni) using atomic absorption spectrophotometry method. The average snow cover depth is evenly distributed in the study area and varies from year to year. Contents of dust, ammonia (), phosphorus (P₂O₅), Mg in snow on the forest floor significantly differ (an upward bias) from areas of arable land. Ions , alkaline and alkaline-earth elements show an increasing trend (relative to the background values) near the industrial zone. The levels of siderophilic and lithophilic elements, copper and zinc increase near the industrial zone of Tomsk agglomeration. Lead shows a mosaic distribution throughout the territory. In disparate locations (Batkat village, Komarovo fens), dust and heavy metals contents in the snow cover were found to be higher relative to the background values.

The results of geocryological studies in the Ytymdzha depression of the Aldan Shield have been presented. From 1999 to 2001, several exploration wells were drilled in the central part of the depression, which made it possible for the first time to obtain the information on the geotemperature field, the thermophysical properties of rocks and the thickness of the permafrost stratum. The long-term series of monitoring of the temperature regime of the active layer obtained for the bogged floodplain terrace, the upland terrace, and the slope of the southern exposure have been adduced. The temperature of rocks at a depth of 1 m varies from 4.8 to -11.7 °С, with average annual temperature ranging from -1.0 to -4.9 °С. The work has resulted in the sublongitudinal permafrost-geothermal section along the central part of the Ytymdzha depression, within which the thickness of permafrost varies from 106 to 251 m.

Remote sensing methods of retrogressive thaw slumps (RTS) - also called thermocirques (TC) - study include identification of them on vast territories. The satellite imagery mosaic of the Yandex.Maps service covering the Yamal and Gydan peninsulas was innovatively used for this purpose. All RTS (TC) occurred at the lake coasts were classified as active and stabilized, the orientation of each RTS (TC) was determined. We identified 86 active and 20 stabilized RTS in the Yamal peninsula and 224 active RTS versus 109 stabilized in Gydan. The distribution of RTS orientation was found to be not random. Multiple comparison of RTS orientation over four directions showed statistically significant predominance of Northern RTS orientation over the Eastern, as well as Western orientation over the Eastern. At the same time, none of the orientations showed statistically significant predominance over all the others. No statistically significant relationship between RTS orientation and RTS activity was found.

The paper presents an estimate of annual precipitation amount for the winter period (1967-2006) in the basins of the Charysh and Anuy mountain rivers. A kinematic model for air mass movement when crossing orographic barriers is used for calculations. The initial data are monthly precipitation totals (November-March) obtained from meteorological and gaging stations located within the basins and at the adjacent territory. Based on the single-factor dependencies and multiple correlation/regression analysis, we assess the dependences of melt runoff depth on total precipitation for winter and flood (April-June) time periods for gaging stations “Charyshsky state farm” on Charysh river and “Anuysky state farm” on Anuy.

The purpose of the article is to reveal the conditions of occurrence and formation of subpermafrost waters, which have been exposed by wells in the Paleozoic, Triassic terrigenous rocks and the Lower Cretaceous granitoids of the Chukotka Upland. In the Paleozoic strata, the confined subpermafrost waters were exposed at depths from 223 to 340 m. The specific yield of wells varies from 0.01 to 0.5 L/(s·m), the composition is predominantly chloride, mineralization ranges from 0.2 to 1.3 g/dm³. In the Triassic rocks at depths from 100 to 300 m, the piezometric surface of waters is higher than the wellhead levels by 3-4 m and up to 58.4 m. The specific yield of wells varies from 0.00001 to 0.25 L/(s·m). The waters are chloride, hydrocarbonate and sulphate, salinity ranges from 0.1 to 3.1 g/dm³. In granitoid massifs, the thickness of permafrost near the sea coast is about 100 m; on the watersheds, it is about 450 m. The specific yield of wells varies from 0.0001 to 0.013 L/(s·m). The obtained data, confirmed by the magnetotelluric sounding, indicate the development of hydrogeological massifs composed of igneous and metamorphosed rocks in the upland. Structures with quasi-stratum fracture reservoirs, associated with overthrusts and faults, were formed in the terrigenous Triassic strata. The impermeable fault planes divide the quasi-strata into sections, which are poorly interconnected hydraulically. For this reason, in the Triassic subpermafrost strata, the stagnant or extremely impeded water exchange predominates persisting for more than 400 thousand years; in the hydrogeological massifs, the water exchange is more active.