On the determination of age and mass functions of stars in young open star clusters from the analysis of their luminosity functions

Based on the CCD observations of remote young open clusters NGC 2383, NGC 2384, NGC 4103, NGC 4755, NGC 7510 and Hogg 15, we constructed their observed luminosity functions (LFs). The observed LFs are corrected for field star contamination determined with the help of galactic star count model. In the case of Hogg 15 and NGC 2383 we also considered the additional contamination from neighbouring clusters NGC 4609 and NGC 2384 respectively. These corrections provided the realistic pattern of cluster LF in the vicinity of the MS turn on point and at fainter magnitudes, revealed the so called H-feature arising due to transition of the Pre-MS phase to MS, which is dependent on the cluster age. The theoretical LFs were constructed representing a cluster population model with continuous star formation for a short time scale and a power law Initial Mass Function (IMF) and these were fitted to the observed LF. As a result we are able to determine for each cluster a set of parameters, describing cluster population (the age, duration of star formation, IMF slope and percentage of field star contamination). It was found that in spite of the non-monotonic behaviour of observed LFs, cluster IMFs can be described as the power law functions with slopes similar to Salpeter's value. The present MS turn on cluster ages are several times lower than those derived from the fitting of theoretical isochrones to the turn off region of the upper Main Sequences.Comment: 17 pages, 5 figures, To appear in MNRA

Polarization of Tau Leptons Produced in Quasielastic Neutrino--Nucleon Scattering

A numerical analysis of the polarization vector of tau leptons produced through quasielastic neutrino and antineutrino interactions with free nucleons is given with two models for vector electromagnetic form factors of proton and neutron. The impact of G parity violating axial and vector second-class currents is investigated by applying a simple heuristic model for the induced scalar and tensor form factors.Comment: Thesis of a talk given at the 8th Scientific Conference (SCYSS-04), Dubna, Russia, 2 - 6 Feb 2004. 11 pages, 6 figures; added references, figures and discussion; conclusions unchange

Исследование углекислого газа и метана в глобальном и региональном (Сибирь) масштабах: обзор

Статья на рус. яз. с.

Theoretical foundations of increasing quality of production

The quality of the products is one of the main factors for increasing the competitiveness of the enterprise in the market. To this end, it is necessary to develop and implement a whole range of measures for lean manufacturing, to form a quality management systemКачество выпускаемой продукции является одним из основных факторов повышения конкурентоспособности предприятия на рынке. С этой целью необходимо разрабатывать и внедрять целый комплекс мероприятий по бережливому производству, формировать систему менеджмента качеств

Ab Initio Calculations of the Walls Shear Strength of Carbon Nanotubes

The dependence of the energy of interwall interaction in double-walled carbon nanotubes (DWNT) on the relative position of walls has been calculated using the density functional method. This dependence is used to evaluate forces that are necessary for the relative telescopic motion of walls and to calculate the shear strength of DWNT for the relative sliding of walls along the nanotube axis and for their relative rotation about this axis. The possibility of experimental verification of the obtained results is discussed.Comment: 4 pages, 1 figur

Digitalisation of state and municipal services, using the federal state information system “Unified Population Register” as an example

The article formulates the prerequisites that prompted state authorities to implement the project of the federal state information system “Unified Population Register” in order to promptly obtain the most complete and reliable information on the citizens of the Russian Federation. The results of an overview of changes for citizens and government agencies from the introduction of a population information system have been presented. The relevance of the project has been analysed and the pros and cons have been considered. The creation of a single population register will simplify interdepartmental cooperation, facilitate the provision of e-services and social assistance to the population, help to combat crime more effectively, and further develop the information society

East and West: global technological confrontation

In recent years the technological rivalry between China and the USA has become increasingly intense as both countries compete for dominance in the following promising technological areas: in the creation of artificial intelligence systems, in the production of equipment for 5G generation communication networks, in quantum computing, in the design and manufacture of electric vehicles and in biotechnology research. As China’s economy grows and its technological capabilities expand, the USA is increasingly concerned about the consequences of China’s rapid technological growth for national security, economic competitiveness and for global dominance of the USA. In response to China’s technological rise, the USA has taken a number of steps to restrict China’s access to “sensitive” technologies and protect its own interests. The result of such actions was a complex and dynamic confrontation that has an impact on the future of the global economy and technological innovation. This article examines a retrospective of the relationship between the two most developed economies of the world; studies the factors that led to the digital confrontation; analyzes the potential impact of digital competition on the global economy and also considers the prospects for further development of China and the USA as technological giants of modernity

East and West: global challenges to achieving carbon neutrality

The aim of the study is to determine the factors of occurrence and reasons for growth of the energy crisis in the context of the transition to carbon and climate neutrality of European Union’s countries, People’s Republic of China. The energy problems that have arisen in the economy on the way to reducing the indicators of anthropogenic impact on climate change and provoked the energy crisis of the 2021 second half and is currently ongoing in the European Union countries and China were analysed. The main objective of the research is to study the mechanism of cross-border carbon regulation aimed at protecting European producers from environmental dumping and designed to reduce the risks of migration of carbon-intensive industries to countries with a less stringent climate policy. The relevance of the research topic is due to the need to identify steps to modernise the energy sector of the economies of countries that are just embarking on the path of carbon neutrality in order to prevent such energy crises. The results of the study can be used in the formation and adaptation of energy transition strategies for all states and subnational associations that have attempted to achieve carbon neutrality. When reviewing and correcting climate initiatives, a strategy to form a reserve of reliable and cost-effective basic generating capacities has been proposed