Recent publications
The two-dimensional edge plasma code SOLPS-ITER have been used to study the hydrogen isotope effect on the divertor detachment onset for hydrogen (H), deuterium (D), and tritium (T) based on EAST plasma conditions. Results prove that H with a lighter mass has a stronger ability to penetrate into the core plasma than D and T, resulting in a higher density in the core and a lower density in the SOL. If the line-averaged electron density is selected to characterize the detachment onset, the hydrogen isotope effect is strongly dependent on the measurement chord location which determines the contribution of the core electron density to the line-averaged electron density. The modeling results can explain previous hydrogen isotope experimental results in JET. The drifts effect on hydrogen isotope distributions has also been investigated. As the drifts are taken into account, the relative difference of detachment onset at the outer target becomes larger, while it becomes smaller for the inner target. The E×B drifts show a greater impact on the T ion distribution than D and H ions.
SMC (Structural Maintenance of Chromosomes) ATPase proteins are integral components of complexes bearing the same name, crucial for the spatial organization of DNA across diverse life forms, spanning bacteria, archaea, and eukaryotes. It is proposed that in bacteria, SMC complexes facilitate DNA compaction through loop extrusion and aid in the segregation of daughter nucleoids. In this paper the properties of the SMC ATPase protein from U. parvum were investigated by using a spectrum of methods, including conventional biochemical methods as well as advanced single-molecule techniques. Our findings reveal distinctive properties of this protein compared to its extensively studied homologue from Bacillus subtilis. Notably, our results suggest that U. parvum Smc ATPase facilitates DNA compaction even in the absence of ATP.
An approach for calculation of the magnetic force arising between two electric current-carrying filaments having a circular and closed-curve of arbitrary shape is developed. The developed approach is based on the recently formulated segmentation method applied for the calculation of the mutual induction for a similar filament system. Employing the fact that any curve can be interpolated by a set of line segments with the desired accuracy and deriving the set of formulas for calculating of the magnetic force between a circular filament and line segment, the developed approach was also successfully applied for the estimation of the distribution of magnetic force along the closed-curve in addition to the resulting one. As illustrative examples, the calculation of the magnetic force and its distribution between the circular filament and the following closed-curves such as polygons, circles and a 3D curve was efficiently performed by using the developed approach. Also, the developed method was applied for the calculation of the resultant magnetic force between the rigid bodies including permanent magnets and current-carrying coils. The results of calculation were validated successfully by using FEM method and the analytical formulas available in the literature.
Subject. This article discusses the issues of developing new management approaches that take into account the widespread use of digital technologies. Objectives. The article aims to identify problems related to the further development of the digital economy in Russia. Methods. For the study, I used the methods of rating and integral analyses. Results. The article proposes an original algorithm for assessing the digital maturity of the region, which helps diagnose problems and identify "growth zones". Conclusions. To ensure the growth of key socioeconomic indicators, it is necessary to focus on advanced achievements in the digital sphere.
Subject. This article discusses a set of economic issues related to the innovative development of biological technology in agriculture. Objectives. The article aims to assess the role of biotechnology in ensuring food security, determining the level of innovative development of agricultural biotechnologies in Russia, the USA and China. Methods. For the study, we used the fuzzy set and cluster analysis methods. Results. Based on the analysis of trends in the development of the world market of agricultural biotechnologies, the article identifies the main factors hindering the innovative development of agricultural biotechnologies in Russia and the regions of Russia that are the most promising ones for the implementation of innovative projects. Conclusions. At present, Russia fails to keep pace with the United States and China in the field of agricultural biotechnology. It is necessary to use the positive foreign practices of introducing innovative biotechnologies in the agricultural regions of Russia.
Subject. This article discusses the issues of optimization of costs of corporate vehicle fleets and effective distribution of vehicle routes and travel time. Objectives. The article aims to develop a model to assess fuel efficiency over different periods of time and accident probability, taking into account the individual driving style. Methods. For the study, we used statistical and econometric analyses. Results. The article reveals the main factors that help assess the efficiency of fuel consumption, and it presents a method of its calculation. The article also describes formats for aggregating data coming from telematics devices into a convenient array of information. Conclusions. Accounting for acceleration data improves the quality of the developed mathematical model, which is the first step towards optimizing the costs of corporate vehicle fleets related to fuel consumption.
Currently, the educational community and the state are solving the task of creating a new nationally oriented system of engineering education. President of the Russian Federation Vladimir Putin noted: “We must rely on the fundamental bases of our education system, but look to the future, move forward, take the best that is in the world. And create your own.” In the article, the authors tried to answer the question: “What has underpinned the success and prestige and constitutes the fundamental bases of the national engineering education system?”. The main subject of analysis in the article is the normative legal acts of the Russian Empire and the USSR. The authors refer to the fundamental bases of engineering education only those components that have passed the test of time, post-revolutionary experiments during the change of historical epochs. Special attention is paid to the analysis of the negative experience of post-revolutionary experiments in the first third of the XX century. It is noted that the Soviet system, having gone through a series of post-revolutionary experiments of the 20s of the XX century, preserved and developed the original, unique features of the public education system of the Russian Empire. The authors presented these features, which form the basis for the success of the national education system, in the form of 9 theses. The abstracts were approved at a meeting of the Coordinating Council of the Ministry of Science and Education of the Russian Federation in the field of education “Engineering, Technology and Technical Sciences” within the framework of the round table of the Committee on Science and Higher Education of the State Duma of the Federal Assembly of the Russian Federation on “Improving the quality and increasing the prestige of engineering education in the Russian Federation” on June 17, 2024.
Lithium metal anode emerges as an ideal candidate for the next generation of high‐energy‐density batteries. However, challenges persist in achieving high lithium utilization rates while maintaining the demands of high energy density and extended cycle life. In this work, a novel conversion–lithiophilicity strategy is proposed to regulate the longevity of high‐energy‐density batteries by injecting lithium ion activity. This strategy is validated through carbon nanofiber decorated with Fe3C and Fe2O3 particles. The uniform metallic lithium deposition induced by lithiophilic Fe3C substrates has been verified through lithium deposition/stripping experiments and density functional theory calculations. The electrochemical active Fe2O3 component supplies additional anodic capacity and suppress battery degradation, as demonstrated in lithium‐ion storage research and three electrode system studies. When paired with LiFePO4 cathodes at an N/P ratio of 2, the full battery showcases outstanding cycling stability over 300 cycles at 1C, with an exceptional energy density of 438 Wh kg⁻¹ (calculated based on the cathode material and lithium content). Furthermore, the full battery delivers rapid kinetics of 124 mAh g⁻¹ at 2C. The conversion–lithiophilicity strategy presented offers a promising avenue for the development of high‐energy density and long‐life lithium metal batteries.
Subject. This article discusses the lease relations regulated by Federal Accounting Standard (FSBU) 25/2018 – Accounting for Leases. Objectives. The article aims to identify problems in the practical application of FAS (FSBU) 25/2018 and develop recommendations for their elimination based on IFRS 16 – Leases. Methods. For the study, we used the methods of analysis and synthesis, comparison, and generalization. Results. The article identifies transactions that are not regulated by FAS (FSBU) 25/2018. It clarifies the wording of the cases of classification of lease and sublease as operating ones and, based on the analysis of the presentation of lease accounting items in the financial statements, offers the authors-developed recommendations for changing the accounting of financial leases with the lessor-manufacturer. Conclusions. Certain transactions that are not regulated by FAS (FSBU) 25/2018 should be recorded in accounting and reporting on the basis of the original source, namely IFRS 16.
Introduction. Cold brewing is a relatively new method of preparing coffee.
The goal research was to study the dynamics of biologically active compounds and antioxidant activity during cold extraction of coffee using Arabica coffee sold on the Russian consumer market.
The Methods. Extraction was carried out for 24 hours in two versions differing in the temperature of the water for extraction (+20 °C and +4 °C). At different time intervals (5 minutes, 1, 3, 6, 12 and 24 hours) the following were determined in the extracts: spectrophotometrically for caffeine content, the amount of chlorogenic acids, phenolic compounds; antioxidant activity by the coulometric method. The coffee extract brewed in a French press for 5 minutes using the hot method served as a control sample.
The Results. The main part of biologically active compounds passed into the extract after 6 and 12 hours when using water at a temperature of +20 °C and +4 °C for extraction, respectively, constituting more than 90 and 95 % of their total amount extracted in 24 hours. At the same time, their antioxidant activity was only 83.89 and 87.45 %. The content of biologically active compounds and the antioxidant activity of the extracts reached or exceeded the control after 24 hours of extraction. In drinks prepared for 6 and 24 hours (water temperature +20 °C) and 12 and 24 hours (water temperature +4 °C), soluble dry substances, pH, titratable acidity, and brown color intensity were additionally determined. At a higher temperature, coffee acquires a bitter taste during 24 hours of extraction, which reduces its organoleptic assessment.
The Conclusion. To form optimal organoleptic and antioxidant properties when preparing Arabica coffee using cold brewing method, water at a temperature of +20 °C and +4 °C can be used with an extraction time of 6 and 24 hours, respectively.
Institution pages aggregate content on ResearchGate related to an institution. The members listed on this page have self-identified as being affiliated with this institution. Publications listed on this page were identified by our algorithms as relating to this institution. This page was not created or approved by the institution. If you represent an institution and have questions about these pages or wish to report inaccurate content, you can contact us here.
Information