Substantiation of investment component of development of property potential of economic systems in agricultural sector of economy

The article is devoted to the development of factor analysis tools based on the DuPont model, which are adapted to the realities of management of domestic (Ukrainian) agrarian enterprises in the context of substantiation of directions of effective use of their property potential. It is revealed on the basis of economic models of formation of property potential of the tendency of investment-innovative development of agricultural enterprises

Coastal permafrost landscape development since the Late Pleistocene in the western Laptev Sea, Siberia

The palaeoenvironmental development of the western Laptev Sea is understood primarily from investigations of exposed cliffs and surface sediment cores from the shelf. In 2005, a core transect was drilled between the Taymyr Peninsula and the Lena Delta, an area that was part of the westernmost region of the non-glaciated Beringian landmass during the late Quaternary. The transect of five cores, one terrestrial and four marine, taken near Cape Mamontov Klyk reached 12km offshore and 77m below sea level. A multiproxy approach combined cryolithological, sedimentological, geochronological (C-14-AMS, OSL on quartz, IR-OSL on feldspars) and palaeoecological (pollen, diatoms) methods. Our interpretation of the proxies focuses on landscape history and the transition of terrestrial into subsea permafrost. Marine interglacial deposits overlain by relict terrestrial permafrost within the same offshore core were encountered in the western Laptev Sea. Moreover, the marine interglacial deposits lay unexpectedly deep at 64m below modern sea level 12km from the current coastline, while no marine deposits were encountered onshore. This implies that the position of the Eemian coastline presumably was similar to today's. The landscape reconstruction suggests Eemian coastal lagoons and thermokarst lakes, followed by Early to Middle Weichselian fluvially dominated terrestrial deposition. During the Late Weichselian, this fluvial landscape was transformed into a poorly drained accumulation plain, characterized by widespread and broad ice-wedge polygons. Finally, the shelf plain was flooded by the sea during the Holocene, resulting in the inundation and degradation of terrestrial permafrost and its transformation into subsea permafrost

The use of CORONA images in remote sensing of periglacial geomorphology: an illustration from the NE Siberian coast

CORONA images have been used for the mapping of periglacial features on the Bykovsky Peninsula and adjacent Khorogor Valley in northeast Siberia. Features, mapped and analysed within a geographical information system, include thermokarst depressions, thermo-erosional valleys, thermo-erosional cirques, thermokarst lakes, thermokarst lagoons and pingos. More than 50% of the area is strongly influenced by thermally-induced subsidence. Thermokarst in the area is probably less active today than in the early-middle Holocene

A Charge Transport in Ultrathin Electrically Continuous Metal Films

The problems of ultrathin stable electrically continuous metal films fabrication and their electron-transport properties are discussed. To prevent the coagulation process of metal grains during metal film condensation, the surfactant underlayers utilizing is discussed. Analysis of current theoretical concepts concerning electron-transport properties of metal film is performed. The experimental data are explained within the scope of the modern theoretical models.Обговорено проблему створення надтонких (товщина шару від 2 нм до 50 нм) електрично суцільних стабільних провідних шарів металів і вивчення їхніх електричних властивостей. Розглянуто можливість застосування сурфактантних підшарів для запобігання коаґуляції зародків кристалізації в процесі росту плівок. Здійснено аналізу сучасного стану модельних уявлень про перенесення заряду в металевих зразках обмежених розмірів, і на його основі проведено трактування результатів експериментального дослідження надтонких металевих плівок.Обсуждается проблема создания сверхтонких (толщина слоя от 2 нм до 50 нм) электрически сплошных проводящих стабильных слоев металлов и исследования их электрических свойств. Рассмотрена возможность применения сурфактантных подслоев для предотвращения коагуляции зародышей кристаллизации в процессе роста пленок. Сделан анализ современного состояния модельных представлений о переносе заряда в металлических образцах ограниченных размеров, и на его основе проведена трактовка результатов экспериментального исследования сверхтонких металлических пленок

Mineral associations of late Quaternary permafrost deposits - Bol’shoy Lyakhovsky Island compared to other locations in northern Siberia.

Bol’shoy Lyakhovsky Island has been a major focus area in Yedoma research in course of joint Russian-German expeditions in 1999, 2007 and 2014 conducted by colleagues from the Mel’nikov Permafrost Institute Yakutsk and the Alfred Wegener Institute Potsdam [1,2]. However, origins and genesis of periglacial deposits such as the late Pleistocene Yedoma Ice Complex are still debated [3] and referred to by some researchers as pure windblown sediments, while other researchers suggest more local sediment sources from intense nivation and periglacial weathering, or even a polygenetic origin under comparable cold-climatic, highly continental conditions in different regions. To disentangle sources and potential transport pathways of sediments, mineral associations are useful indicators. Identifying linkages of mineral associations in sediments to local bedrock, fluvial sources, or fare ranging sources for potential eolian transport are therefore important. Various studies on palaeoecology [4,5], stable isotopy [6], geophysics [7], biogeochemistry [8] and palaeogenetics [9] have been carried out over the last more than 20 years. In the present study, we analyzed the mineral associations in sediments of one of the best-dated permafrost sequences including the Yedoma Ice Complex exposed at the southern coast of Bol’shoy Lyakhovsky Island near the Zimov’e River mouth. The permafrost record spans about 200 ka covering the Marine Isotope Stages (MIS) 6 to MIS 1 [10,11,12,13,15], although not continuously. From these deposits, exposed from sea level to about 35 m above sea level, we studied heavy and light minerals of 65 samples from different cryostratigraphic horizons in both the 63-125 µm and the 125-250 µm fractions. The studied mineral grains used are subangular to slightly rounded. The heavy mineral associations are dominated by amphibole, epidote, pyroxene, titanite, ilmenite, garnet, zircon, apatite, and rutile. Leucoxene is found in several samples as well as biotite, chlorite and weathered micas. The light mineral association is dominated by feldspar, quartz, and chlorites. Carbonates, muscovite, and broken mica are observed in some samples. Differences in the heavy and light mineral associations represent varying sediment sources and transport mechanisms of the deposits aligned to the distinct cryostratigraphic horizons (Fig. 1). Characteristic associations of the different horizons are assessed using variance analysis on the counted mineral grains. Statistically significant (at 95% confidence level) distinct mineral associations are found with ilmenite, garnet, zircon, tourmaline, titanite, and leucoxene in the heavy minerals and feldspar in the light minerals. MIS 1 (Holocene thermokarst deposits) is the least distinctly separable unit in the heavy minerals, MIS 4 (Zyryan stadial floodplain deposits) and MIS 6 (Yukagir interstadial Ice Complex) are the most distinctly separable units. In the light minerals, MIS 2 (stadial Sartan Yedoma Ice Complex) is the least and MIS 4 the most distinctly separable unit. The MIS 3 (interstadial Molotkov Yedoma Ice Complex) and the MIS 5 (interglacial Kazantsev thermokarst deposits) units show intermediate separability in both heavy and light minerals. The Bol’shoy Lyakhovsky mineral associations were compared with other permafrost exposures on the Siberian mainland along the Laptev Sea coast [15,16,17], in the Lena Delta [18], and on other islands of the New Siberian Archipelago. Our findings suggest that weathered bedrock from nearby ridges and hills was the most likely source material for the formation of late Quaternary permafrost deposits. The local sediment sources are more in line with hypotheses for Yedoma Ice Complex genesis [19] that involve largely local erosion, transport, and deposition processes as opposed to eolian deposition involving regional to panarctic-scale movement of dust and larger grainsize particles. A B Fig. 1 Averages of heavy (A) and light (B) mineral associations of the 63-125 µm fraction according to the stratigraphy References 1. Andreev, A. et al. Weichselian and Holocene palaeoenvironmental history of the Bol’shoy Lyakhovsky Island, New Siberian Archipelago, Arctic Siberia, Boreas, 2009, 38(1), 72–110. 2. Andreev, A. et al. Late Saalian and Eemian palaeoenvironmental history of the Bol'shoy Lyakhovsky Island (Laptev Sea region, Arctic Siberia), Boreas, 2004, 33(4), 319-348. 3. Schirrmeister, L. et al. Yedoma: Late Pleistocene ice-rich syngenetic permafrost of Beringia, Encyclopedia of Quaternary Science, 2nd edition, 2013, 3, 542-552. 4. Kienast, F. et al. Continental climate in the East Siberian Arctic during the last interglacial: implications from palaeobotanical records, Global Planet. Change, 2008, 60(3/4), 535-562. 5. Sher, A.V. et al. New insights into the Weichselian environment and climate of the East Siberian Arctic, derived from fossil insects, plants, and mammals, Quat. Sci. Rev., 2005, 24, 533–569. 6. Meyer, H. et al. Paleoclimate reconstruction on Big Lyakhovsky Island, North Siberia - Hydrogen and oxygen isotopes in ice wedges, Permafrost Periglac. Process., 2002, 1, 91–105. 7. Schennen, S. et al. 3D GPR imaging of Ice Complex deposits in northern East Siberia, Geophysics, 2016, 81(1), WA185-WA192 8. Stapel, J.G. et al. Substrate potential of last interglacial to Holocene permafrost organic matter for future microbial greenhouse gas production, Biogeosciences, 2018, 15, 1969–1985. 9. Zimmermann, H.H. et al. The history of tree and shrub taxa on Bol’shoy Lyakhovsky Island (New Siberian Archipelago) since the last interglacial uncovered by sedimentary ancient DNA and pollen data, Genes, 2017, 8(10), E273 10. Wetterich, S. et al. Eemian and Late Glacial/Holocene palaeoenvironmental records from permafrost sequences at the Dmitry Laptev Strait (NE Siberia, Russia), Palaeogeogr. Palaeoclimatol. Palaeoecol., 2009, 27, 73-95. 11. Wetterich, S. et al. Last Glacial Maximum records in permafrost of the East Siberian Arctic, Quat. Sci. Rev., 2011, 30, 3139-3151. 12. Wetterich, S. et al. Ice Complex formation in arctic East Siberia during the MIS3 Interstadial, Quat. Sci. Rev., 2014, 84: 39-55. 13. Wetterich, S. et al. Ice Complex permafrost of MIS5 age in the Dmitry Laptev Strait coastal region (East Siberian Arctic), Quat. Sci. Rev., 2016, 147: 298-31 14. Wetterich, S. et al. Recurrent Ice Complex formation in arctic eastern Siberia since about 200 ka, Quat. Res., 2019, 92(2): 530-548. 15. Siegert, C. et al. The sedimentological, mineralogical and geochemical composition of late Pleistocene deposits from the ice complex on the Bykovsky peninsula, northern Siberia, Polarforschung, 2000, 70, 3-11. 16. Schirrmeister, L. et al. Paleoenvironmental and paleoclimatic records from permafrost deposits in the Arctic region of Northern Siberia, Quat. Int., 2002, 89, 97-118. 17. Schirrmeister, L. et al. Periglacial landscape evolution and environmental changes of Arctic lowland areas for the last 60,000 years (Western Laptev Sea coast, Cape Mamontov Klyk), Polar Research, 2008, 27(2), 249-272. 18. Schirrmeister; L. et al. ). Late Quaternary paleoenvironmental records from the western Lena Delta, Arctic Siberia, Palaeogeogr. Palaeoclimatol. Palaeoecol., 2011, 299, 175–196 19. Schirrmeister, L. et al. The genesis of Yedoma Ice Complex permafrost – grain-size endmember modeling analysis from Siberia and Alaska, E&G Quaternary Sci. J., 2020, 69, 33–5

Heavy and light mineral association of late Quaternary permafrost deposits in Northeastern Siberia

We studied heavy and light mineral associations from two grain-size fractions (63–125 μm, 125–250 μm) from 18 permafrost sites in the northern Siberian Arctic in order to differentiate local versus regional source areas of permafrost aggradation on the late Quaternary time scale. The stratigraphic context of the studied profiles spans about 200 ka covering the Marine Isotope Stage (MIS) 7 to MIS 1. Heavy and light mineral grains are mostly angular, subangular or slightly rounded in the studied permafrost sediments. Only grains from sediments with significantly longer transport distances show higher degrees of rounding. Differences in the varying heavy and light mineral associations represent varying sediment sources, frost weathering processes, transport mechanisms, and postsedimentary soil formation processes of the deposits of distinct cryostratigraphic units. We summarized the results of 1141 microscopic mineral analyses of 486 samples in mean values for the respective cryostratigraphic units. We compared the mineral associations of all 18 sites along the Laptev Sea coast, in the Lena Delta, and on the New Siberian Archipelago to each other and used analysis of variance and cluster analysis to characterize the differences and similarities among mineral associations. The mineral associations of distinct cryostratigraphic units within several studied profiles differ significantly, while others do not. Significant differences between sites as well as between single cryostratigraphic units at an individual site exist in mineral associations, heavy mineral contents, and mineral coefficients. Thus, each study site shows individual, location-specific mineral association. The mineral records originate from multiple locations covering a large spatial range and show that ratios of heavy and light mineral loads remained rather stable over time, including glacial and interglacial periods. This suggests mostly local sediment sources and highlights the importance of sediment reworking under periglacial regimes through time, including for example the formation of MIS 1 thermokarst and thermo-erosional deposits based on remobilized MIS 3 and 2 Yedoma Ice Complex deposits. Based on the diverse mineralogical results our study supports the viewpoint that Yedoma Ice Complex deposits are mainly results of local and polygenetic formations (including local aeolian relocation) superimposed by cryogenic weathering and varying climate conditions rather than exclusive long distance aeolian transport of loess, which would have highly homogenized the deposits across large regions

Software tool for speaker recognition

The rapid development and widespread dissemination of information systems and technical means necessitates computer processing of speech information because the voice interaction interface seems to be the most convenient. Thus it is advisable to use voice technologies for biometrics namely the verification of the speaker by voice

Dinamika beregov vostochnykh arkticheskikh morej Rossii: osnovnye faktory, zakonomernosti i tendentsii (Dynamics of the Russian east Arctic sea coast: Major factors, regularities and tendencies)

Climatic, geocryological, geological and hydrodynamic conditions and available data on Arctic coast dynamics are analyzed. The basic laws of ice-rich coast development in varied geocryological and climatic conditions are investigated. Functional connections of coastal destructive cryogenic processes activity with summer air temperature and storms recurrence are revealed. The forecast of ice-rich coast rate retreat for the Laptev Sea and East-Siberian Sea is executed in connection with prospective changes of climate in XXI century