17 research outputs found

    Postglacial relative sea level change at Fildes Peninsula, King George Island (West Antarctic)

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    Analysis and integration of data obtained in our field and laboratory investigations of 2008–2012 together with results of previous paleogeographic studies were conducted to reveal parameters and factors of the post-glacial changes in the relative sea-level on the Fildes Peninsula and the King George Island. Results of dating of organic material taken from cross-sections of Quaternary deposits, data on morphology of marine landforms as well as on bottom sediments in lakes were used to construct a curve of changes in the relative sea-level.Our research has shown that the rapid rise of relative sea level in the area (since the beginning of the Holocene) decelerated about 8000 years BP, achieving its maximum about 7000 years BP. This was followed by the fall of relative sea-level (the land elevation) by 18–20  m in total, and it was characterized by relatively high rate of fall during periods of 6000– 5000 years BP, 4000–2500 years BP, and during the last 1500 years; the rate decreased in 5000–4000 years BP and 2500– 1600 years BP. The changes in relative sea level in this region were determined by the following factors: the eustatic component of the global changes in sea-level and, possibly, oscillations in the global sea level of another nature; local parameters of the Last glacial maximum; a course of the Peninsula deglaciation; regional physical characteristics of the Earth's crust and the mantle substances; local tectonic processes, including the isostatic rebound. Since the beginning of the Holocene up to about 7000 years BP, the main contribution to changes of the relative sea-level in this area was made by the global eustatic factor. The subsequent fall of the relative sea-level (elevation of the Peninsula surface) proceeded under condition of reduced role of the eustatic factor and predominance of other factors

    Environmental conditions of interstadial (MIS 3) and features of the last glacial maximum on the King George island (West Antarctica)

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    The interstadial marine deposits stratum was described in the Fildes Peninsula (King George Island) due to field and laboratory investigations during 2008–2011. The stratum fragments occur in the west and north-west parts of peninsula in following forms: sections of soft sediments, containing fossil shells, marine algae, bones of marine animals and rich marine diatom complexes in situ (11 sites); fragments of shells and bones on the surface (25 sites). According to the results of radiocarbon dating, these deposits were accumulated within the period 19–50 ky BP. Geographical and altitude settings of the sites, age characteristics, taxonomy of fossil flora and fauna, and good safety of the soft deposits stratum allow to make following conclusions: during interstadial, sea water covered significant part of King George Island up to the present altitude of 40 m a.s.l., and the King George Island glaciation had smaller size then; environmental conditions for the interstadial deposit stratum accumulation were at least not colder than today; probably, the King George island territory was covered entirely by ice masses of Last glacial maximum not earlier than 19 ky BP; during Last glacial maximum, King George Island was covered by thin, «cold», not mobile glaciers, which contribute to conservation of the soft marine interstadial deposits filled with fossil flora and fauna

    Epoxy Nanocomposites with Carbon Nanotubes Produced by Floating Catalyst CVD

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    Epoxy nanocomposites with float catalysis-produced CNT felt as a filler were prepared. Parameters such as the curing process, glass transition of epoxynanocomposites, structure and morphology of CNT felt, initial epoxy composition, and epoxy nanocomposites were investigated. The influence of CNT felt on curing process in epoxy nanocomposites with different amounts of curing agent was determined. An exothermic reaction between the curing agent and the surface of CNTs was established. It was found that the structure of epoxy nanocomposites has a high degree of heterogeneity: the presence of fiber-like structures and individualized CNTs is observed together with the regions that are typical for CNTs that are fabricated via a catalytic chemical vapor deposition (CVD). Based on the studies performed, it is possible to predict the production of epoxy nanocomposites with outstanding mechanical and thermophysical properties. In particular, the uncured compositions already obtained in this work can be used for the manufacture of electrically conductive glass and carbon fiber reinforced plastics and functional coatings

    Условия интерстадиала (MIS3) и характер оледенения в последний ледниковый максимум на о. Кинг Джордж (Западная Антарктика)

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    The interstadial marine deposits stratum was described in the Fildes Peninsula (King George Island) due to field and laboratory investigations during 2008–2011. The stratum fragments occur in the west and north-west parts of peninsula in following forms: sections of soft sediments, containing fossil shells, marine algae, bones of marine animals and rich marine diatom complexes in situ (11 sites); fragments of shells and bones on the surface (25 sites). According to the results of radiocarbon dating, these deposits were accumulated within the period 19–50 ky BP. Geographical and altitude settings of the sites, age characteristics, taxonomy of fossil flora and fauna, and good safety of the soft deposits stratum allow to make following conclusions: during interstadial, sea water covered significant part of King George Island up to the present altitude of 40 m a.s.l., and the King George Island glaciation had smaller size then; environmental conditions for the interstadial deposit stratum accumulation were at least not colder than today; probably, the King George island territory was covered entirely by ice masses of Last glacial maximum not earlier than 19 ky BP; during Last glacial maximum, King George Island was covered by thin, «cold», not mobile glaciers, which contribute to conservation of the soft marine interstadial deposits filled with fossil flora and fauna

    Raising the Level of Legal Culture in Society: Regulatory Framework for Academic Integrity

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    This article aims to analyze academic integrity both as a legal category and as an indicator of legal culture, highlighting its essential role in shaping the quality and morality of higher education. It argues that the implementation and internalization of academic integrity must be prioritized by all actors within the educational system to ensure the sustainable development of the Russian scientific and academic environment. Violations of academic integrity—such as plagiarism, data falsification, or dishonest assessment practices—pose significant risks to the educational process, leading to diminished public trust, intellectual decline, and the normalization of deviant academic behavior. To achieve its objectives, the study employs a qualitative research methodology, using a normative and socio-legal approach. Data are collected through documentary analysis of Russian legislative frameworks, academic codes of conduct, and relevant legal documents regulating education. In addition, in-depth interviews with legal scholars and education policy experts provide interpretative insights into the relationship between law, ethics, and academic practice. The qualitative analysis allows the study to explore not only the normative aspects of academic integrity but also the underlying cultural and institutional factors affecting its enforcement. The findings reveal that the absence of a precise legal definition of academic integrity hinders consistent interpretation and enforcement. Thus, effective regulation should be grounded in well-formulated legislative provisions aligned with international legal drafting standards. Ultimately, the article identifies the key features of academic integrity as a legal category and underscores its pivotal function as both the moral foundation and legal instrument for advancing education quality and social development.   REFERENCES: Abdullayev, I., Akhmetshin, E., Nayanov, E., Otcheskiy, I., & Lyubanenko, A. (2024). 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    Эоплейстоценовые отложения гыданского побережья Енисейского залива (север Западной Сибири)

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    In the north of Western Siberia, natural outcrops of marine Eopleistocene sediments are described. Eopleistocene age is confirmed by SIS-chemostratigraphic studies of samples. For this time, the gradual regression and desalination with the buffing was reconstructed. This is evidenced by the thin-stratification of deposits, the disappearance of foraminifera and marine mollusks and the appearance of brackish and freshwater algae and ostracods. According to the spore-pollen data, Eopleistocene time was warm, coniferous and coniferous-deciduous forests grew on the banks.Описаны естественные обнажения морских эоплейстоценовых отложений на севере Западной Сибири. Эоплейстоценовый возраст подтвержден путем SIS-хемостратиграфических исследований образцов. Для этого времени реконструировано постепенное обмеление и опреснение моря, с заболачиванием осушенного дна. Об этом свидетельствует ленточная слоистость отложений, исчезновение фораминифер и морских моллюсков и появление солоноватоводных и пресноводных водорослей и остракод. По спорово-пыльцевым данным эоплейстоценовое время было теплым, на берегах произрастали хвойные и хвойно-лиственные леса

    Биогеохимия мерзлых толщ арктического побережья полуострова Гыдан

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    Biogeochemistry of permanently frozen deposits on the arctic shore of Gydan peninsula Core drilling was performed in four regions of arctic shore on Gydan peninsula. Complex laboratory analysis of cores allowed to characterize biochemistry of Gydan permafrost. These results are compared with data from other permafrost provinces and are applied for paleoreconstructions.В четырех районах арктического побережья полуострова Гыдан проведено колонковое бурение и отобраны керны мерзлых отложений. Комплекс лабораторных анализов впервые позволил дать биогеохимическую характеристику мерзлых толщ на Гыдане, сравнить полученные результаты с другими районами криолитозоны и применить их для палеореконструкций
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