bluuebunny/crossref_metadata_2025 huggingface dataset:
Palladium-catalyzed asymmetric (4 + 3) cycloaddition of N-2,2,2-trifluoroethylisatin ketimines: access to optically active spirooxindoles
Authors: Meng Yinggao , Song Manman , Wang Yue , Wang Yuxin , Li Er-Qing
Published: April 2023

Herein, we disclose the first Pd-catalyzed enantioselective (4 + 3) cycloaddition of N-2,2,2-trifluoroethylisatin ketimines with 2-methylidenetrimethylene carbonate.
Unveiling catalyst-free electro-photochemical reactivity of aryl diazoesters and facile synthesis of oxazoles, imide-fused pyrroles and tetrahydro-epoxy-pyridines via carbene radical anions
Authors: Maiti Debajit , Saha Argha , Guin Srimanta , Maiti Debabrata , Sen Subhabrata
Published: April 2023

First ever catalyst-free electro-photochemical generation of carbene radical anion from aryl diazoester with direct application into synthesis of interesting N-heterocycles with broad substrate scope and excellent diastereo-selectivity.
Regioselective hydroesterification of alkenes and alkenylphenols utilizing CO2 and hydrosilane
Authors: Wang Meng-Meng , Lu Sheng-Mei , Li Can
Published: April 2023

Regioselective hydroesterification of alkenes and alkenylphenols was achieved utilizing CO2 as a CO source with the assistance of PMHS.
The promotional role of Mn in CO2 hydrogenation over Rh-based catalysts from a surface organometallic chemistry approach
Authors: Zhou Wei , Docherty Scott R. , Ehinger Christian , Zhou Xiaoyu , Copéret Christophe
Published: April 2023

Well-defined Rh-based catalysts modified by isolated Mn are prepared by the surface organometallic chemistry combined with thermolytic molecular precursor SOMC/TMP approach to study the promotional role of Mn in CO2 hydrogenation.
Local structure of liquid/vapour interfaces approaching the critical point
Authors: Hantal György , Jedlovszky Pál , Sega Marcello
Published: April 2023

Computer simulations of liquids along the liquid/vapour coexistence line suggest the presence of a previously unknown length scale that plays a role in the scaling behaviour of fluid interfaces approaching the critical point.
Lanthanum-induced synergetic carrier doping of heterojunction to achieve high-efficiency kesterite solar cells
Authors: Yin Kang , Lou Licheng , Wang Jinlin , Xu Xiao , Zhou Jiazheng , Shi Jiangjian , Li Dongmei , Wu Huijue , Luo Yanhong , Meng Qingbo
Published: April 2023

We introduced La to realize a synergetic doping of the CdS/kesterite heterojunction to overcome the carrier concentration limit of kesterite solar cells and achieved a high efficiency of 13.9%.
Biomass-derived two-dimensional N,O-doped carbon with embedded binary-metal nanoparticles enables dendrite-free potassium-metal anodes
Authors: Shen Qing , He Yibo , Wang Junjie
Published: April 2023

The NiCo@NOGC matrix with rich nitrogen and oxygen functional groups can effectively inhibit dendrite growth and serve as an excellent host for the K metal anode.
Nanoflower-like MoS2 anchored on electrospun carbon nanofiber-interpenetrated reduced graphene oxide as a microbial fuel cell anode achieving high power density
Authors: Liu Yuanfeng , Ren Tingli , Su Zijing , Li Congju
Published: April 2023

Weak biofilm colonization and sluggish extracellular electron transfer (EET) between the biofilm and anode are major obstacles to achieving high power density in microbial fuel cells (MFCs).
Hot-pressed CH3NH3PbI3 polycrystalline wafers for near-infrared bioimaging and medical X-ray imaging
Authors: Yu Ji , Qu Yanmei , Deng Yufu , Meng Dechuan , Tian Ning , Li Lin , Zheng Jie , Huang Yongtao , Luo Yinxian , Tan Wenzhu
Published: April 2023

Near-infrared bioimaging and medical X-ray imaging have been realized by hot-pressed CH3NH3PbI3 polycrystalline wafers.
Atomically dispersed Ru supported on microporous CoO ultrathin nanosheets synthesized by melamine induction for a highly efficient oxygen evolution reaction
Authors: Guo Dong , Chen Chen , Wang Yongqiang , Wang Youke , Zhang Conglu
Published: April 2023

2D cobalt-based hexagonal nanosheets (HNs) with an adjustable structure formed by a melamine thermal reflow method were proposed and were then calcined in an inert gas atmosphere to obtain single-atom ruthenium modified cobalt oxide.
Regio-isomer enabling efficient red TADF emitters based on pyridobenzoquinoxaline
Authors: Pathak Suraj Kumar , Li Ganggang , Zhou Changjiang , Wang Zhiming , Liu He
Published: April 2023

Two pairs of regio-isomeric V- and T-shaped red thermally activated delayed fluorescent molecules involving a new acceptor pyridobenzoquinoxaline are developed, which enable high external quantum efficiencies up to 12.9%.
Copper and iron co-doping effects on the structure, optical energy band gap, and catalytic behaviour of Co3O4 nanocrystals towards low-temperature total oxidation of toluene
Authors: Assaouka Hippolyte Todou , Nsangou Issah Ngouh , Daawe Daniel Manhouli , Mevoa Daniel Onana , Zigla Abraham Atour , Ndouka Patrick Ndouka , Kouotou Patrick Mountapmbeme
Published: April 2023

Cu and Fe co-doping effect on the structural, optical energy band gap, and catalytic performance as well as recycling stability of Co3O4 NCs and their synergetic influence in the toluene deep oxidation via intrafacial process is established.
Generative UAP attacks against deep‐learning based modulation classification
Authors: Li Xiong , Rao Wengui , Chen Shaoping
Published: April 2023

Thanks for its powerful feature extraction capability and unprecedented success in computer vision and language processing tasks, deep learning (DL) has also been applied in recent years to wireless communications. However, DL models are proved to be inherently vulnerable to adversarial perturbations: carefully crafted perturbations that appear imperceptible but can fool the models to induce misclassification. Existing researches in wireless communications employ the gradient‐based or optimization based methods, for example, FGSM, PGD and iterative FGSM, to craft input‐dependent adversarial perturbations. However, these methods have a high computational complexity and the perturbations they craft cannot be readily applied to fool DL‐based algorithms in wireless communications. In this paper, the efficient generation of universal (input‐agnostic) adversarial perturbations (UAPs) used to attack DL‐based modulation classification algorithms is studied. Communication signals exhibit unique characteristics, for example, received modulated signals after transmitting through noisy channels are densely distributed around the modulation constellation points. In this work, the authors have proposed, by making use of this unique characteristics, a generative network to model the distribution of adversarial perturbations for high‐efficiency generation of UAPs, which can fool the DL‐based modulation classification algorithms for most inputs. Instead of attacking all regions of modulated signals, attention mechanisms are introduced in generative network design that enables the perturbations to be concentrated around the constellation points. In this way, a higher attack efficiency and a lower perceptibility are achieved by crafting UAPs with smooth variations and more focused attack. In addition, a diversity term is included in loss function to help capture a wide range distribution of adversary perturbations that will help the generation of more diverse adversary perturbations. Once trained, the generative network can construct with ease a large number of UAPs with some favorable features, which will benefit more efficient adversarial attack and faster adversarial training. Experimental results show the superiority of our proposed method in terms of attack efficiency, imperceptibility and diversity over existing methods.
Nonlinear control for temperature and humidity of a 30m3$30\text{ m}^3$ climate chamber determining VOCs
Authors: Zhao Yajing , Liu Cungen , Liu Xiaoping , Zhou Shiyu , Zheng Huanqi , Wang Huanqing , Zhou Yucheng
Published: April 2023

This paper studies the tracking control problem for a climate chamber control system used for determining volatile organic compounds. A new nonlinear controller, for the first time, is designed for the temperature and humidity control of a climate chamber. For one thing, based on the backstepping technology, an improved control method is proposed with the help of the implicit function theorem instead of employing system linearization. In this way, simplification of the controlled system can be avoidable so that the control accuracy is promoted. For another, without approximations by fuzzy logics or neural networks, the number of complex computations are reduced a lot so that the control rate is improved considerably. In the end, simulation is conducted by Matlab to validate the effectiveness and superiority of the proposed control method.
Personalized federated learning on NLOS acoustic signal classification
Authors: Wang Hucheng , Qiu Suo , Wang Jingjing , Zhang Lei , Wang Zhi , Luo Xiaonan
Published: April 2023

To identify non‐line‐of‐sight, acoustics‐based indoor positioning needs to collect audio recordings of sound fields in multiple rooms and upload them to the central server for training. However, if the transmission process or the server‐side suffers from malicious attacks, private data may be leaked. To address both training difficulties and privacy issues simultaneously, a novel model for personalized federated learning is proposed. This model incorporates user frequency and room data capacity while also taking into account significant differences in positioning data and room layout. The proposed model can accurately identify differences between various room data during aggregation on the server‐side. By collecting data in actual indoor environments and comparing it with existing algorithms, the proposed method achieved 90% accuracy in verifying data for unfamiliar rooms.
An LCC‐S compensated wireless power transfer system using receiver‐side switched‐controlled capacitor combined semi‐active rectifier for constant voltage charging with misalignment tolerance
Authors: Wang Wenbo , Deng Junjun , Chen Deliang
Published: April 2023

The output characteristics of wireless power transfer systems are strongly susceptible to coupling and load variations. To achieve a constant voltage output under varying coupling and load, a voltage regulation method based on a combination of a semi‐active rectifier (SAR) and a switched‐controlled capacitor (SCC) is proposed for the LCC‐S topology. Adjusting the SAR can effectively regulate the voltage, and the introduction of SCC compensates the impedance brought by SAR, ensuring that the resonance condition is fully satisfied at the receiver side. Thus, the proposed wireless power transfer system can achieve zero phase angle over the entire load and coupling range, minimizing reactive power losses. This control method only needs to collect the signal from the receiver side, which enables single‐side control as well as avoids the wireless communication. The situation of coupler parameter drift due to misalignment is also considered. Even if the self‐inductance changes, the zero phase angle can be guaranteed on the receiving side by adjusting the SCC, and the zero voltage switching of the transmitter side can still be achieved. The principle prototype of 3 kW is constructed and the experimental results prove the effectiveness of the proposed method.
Exploring the internal rotation of the extremely low-mass He-core white dwarf GD 278 with TESS asteroseismology
Authors: Calcaferro Leila M. , Córsico Alejandro H. , Althaus Leandro G. , Lopez Isaac D. , Hermes J. J.
Published: April 2023

Context. The advent of high-quality space-based photometry, brought about by missions such as Kepler/K2 and TESS, makes it possible to unveil the fundamental parameters and properties of the interiors of white dwarf stars, particularly extremely low-mass white dwarfs, using the tools of asteroseismology.

Aims. We present an exploration of the internal rotation of GD 278, the first known pulsating extremely low-mass white dwarf to show rotational splittings within its periodogram.

Methods. We assessed the theoretical frequency splittings expected for different rotation profiles and compared them to the observed frequency splittings of GD 278. To this aim, we employed an asteroseismological model representative of the pulsations of this star, obtained by using the LPCODE stellar evolution code and the LP-PUL non-radial pulsation code. We also derived a rotation profile that results from detailed evolutionary calculations carried out with the MESA stellar evolution code and used it to infer the expected theoretical frequency splittings.

Results. We find that the best-fitting solution when assuming linear profiles for the rotation of GD 278 leads to angular velocity values at the surface and center that are only slightly differential, and still compatible with rigid rotation. Additionally, the values of the angular velocity at the surface and the center for the simple linear rotation profiles and for the rotation profile derived from evolutionary calculations are in very good agreement. Also, the resulting theoretical frequency splittings are compatible with the observed frequency splittings, in general, for both cases.

Conclusions. The results obtained from the different approaches followed in this work to derive the internal rotation of GD 278 agree. The fact that they were obtained by employing two independent stellar evolution codes gives our results robustness. Our results suggest only a marginally differential behavior for the internal rotation in GD 278 and, considering the uncertainties involved, this is very compatible with the rigid case, as has been observed previously for white dwarfs and pre-white dwarfs. The rotation periods derived for this star are also in line with the values determined asteroseismologically for white dwarfs and pre-white dwarfs in general.
Hyponymic and graduonymic relations of forestry terms in German and Uzbek languages
Authors: Tilovova Gavhar
Published: April 2023

The article deals with the hyponymic analysis of forestry terms in German and Uzbek languages, and this is one of the main points of the scientific work. In linguistics, it is very important to combine the lexical layers of the language into one system and divide them into lexical-semantic groups. The series divided into separate lexical-semantic groups includes synonyms, antonyms, as well as hypo-hyperonymic series. They are not only connected with each other on the basis of clear semantic connection, but also form a whole microsystem. Also, in the article, the meaning of words was studied by combining them into thematic and lexical-semantic groups. The features of lexical graduonymy are also discussed. Taking into account the wide spread of hyponymic relations in forestry terminology, a number of analyzes were conducted on terms related to subjects taught at forestry faculties. The following subjects are: Forest Breeding, Forest Phytopathology, Dendrology, Forest Medicinal Plants, Forest Entomology, Forest Formation and Anatomy of Forest Plants. According to the type relations of the collected terms, the differential semantics related to the general meaning of the term is distinguished. At the same time, it was found that the study of hypohyperonymic lines in German and Uzbek languages based on forestry terms serves to systematize lexicography.
Effect of trees shaping methods on productivity and harvest quality in intensive apple orchards
Authors: Namozov Ikhtiyor , Zhanakova Durdona , Khojiev Sanjar
Published: April 2023

Our experiments on determining the effect of cutting and shaping branches on the productivity of low-growing apple orchards showed that the quality of cutting trees and the shape of the branches depend on the level of illumination. Based on it, it will be possible to think about the level of intensity of a particular garden, the productivity of photosynthesis and the final result, that is, a high yield. The more moderate the light pattern of the assimilation level of the gardens, the better the photosynthesis and the higher the productivity. This is directly related to the regular and scientific way of cutting trees and the quality of its implementation. This article presents scientifically based information on the study of the influence of the methods of giving shape to trees in intensive apple orchards on the quality of fruits. Depending on the average yield per tree, the highest yield per unit area compared to the control was recorded in the variant plants shaped by the Sparse-tier palmette method according to the rule. In this method of shaping, the yield of the Golden Delicious variety increased from 17.1 t/ha to 23.7 t/ha over the years. In the introduced winter variety Fuji, the highest yield was observed in the Italian palmette method. In this formative method, the productivity increased from 18.7 to 25.8 t/ha according to the research years, which allowed to grow an additional crop by 3.6-4.1 t/ha compared to the control option.
Efficacy of new and existing chemical biopreparations in controlling apple red spider mite (Panonychus ulmi Koch)
Authors: Raxmanov Ahliddin , Sulaymonova Gulasal
Published: April 2023

This article provides information on the damage caused by the apple red spider mite (Panonychus ulmi Koch) in apple orchards and methods of combating it. Apple red spider mite (Panonychus ulmi Koch) is the most dangerous pest of orchards and other crops in other European countries. This pest can kill more than half of the crops in some fields. It is said that spider mite kills 6-10% of the total crop in normal years, and even 14% in some years. The apple red spider mite (Panonychus ulmi Koch) is more dangerous and harmful than other spider mites. In the world, more than 150 species of spider mites are recorded as the main pests of crops. Microbiological biopreparations Bioslip BV (Beauveria bassiana) was found to be a microbiological biopreparation with a strong effect on arachnids that cause damage in seed orchards at the rate of 3.0 l/ha. The effect of microbiological biopreparations can be achieved on the third-seventh and fourteenth-twenty-first day. The Bioslip BV (Beauveria bassiana) 3.0 l/ha biopreparation and Bioslip BT (Bacillus thuringiensis) (toxin crystals in 1 g) (1.0 l/ha) biopreparations taken for the experiment were analyzed from the 3rd day of use. According to the results of the conducted research, in the variant where Bioslip BV (Beauveria bassiana) 3.0 l/ha biopreparation was used, the biological efficiency was 44.2% on the 3rd day after using the biopreparation, 72.3% on the 7th day, and 72.3% on the 14th day. 73.9% on the 21st day, and 60.2% on the 21st. Bioslip BT microbiological biopreparation (Bacillus thuringiensis) (toxin crystals in 1 g) (1.0 l/ha) 86.7% on the 3rd day, 85.8% on the 7th day, 88.9% on the 14th day, and on the 21st it was 87.5%.
Geopolitical crises, the energy sector, and the financial capital market
Authors: Konovalova Maria , Abuzov Artur
Published: April 2023

The events of 2022-2023, including sanctions policies and the introduction of price ceilings on Russian oil and gas, have demonstrated the significant impact of geopolitical crises on the financial capital market, especially in the energy sector. This article provides an overview of the modern literature on the influence of geopolitical risks on the financial capital market with a focus on the energy sector. The key factors determining the stability of the financial capital market are identified, and recommendations are given on how to diversify investment portfolios in light of these risks. The authors present a mathematical model for optimizing investment portfolios in modern conditions. The article emphasizes the importance of understanding how geopolitical risks can affect the financial capital market and offers insights into how investors can manage these risks to achieve stable returns. The authors conclude that diversification and risk management are crucial for successful investing in today's volatile geopolitical climate and highlight the need for continuous monitoring of geopolitical risks to ensure that investment decisions remain informed and strategic. Overall, this article provides a comprehensive guide to understanding the relationship between geopolitical risks, the energy sector, and the financial capital market, and offers practical advice for investors seeking to optimize their investment portfolios in these challenging conditions.
State and legal regulation of the agricultural sector
Authors: Suhanov Alexander
Published: April 2023

The relevance of this topic is due to the problems that lead to the search for alternatives to improve the tools of state regulation of agro-industrial complex, both at the state level and at the level of Russian regions. The object of the study were the forms and methods of state regulation of the agrarian sector of the Russian Federation. The subject of scientific research were organizational and economic relations affecting the formation of the mechanism of state regulation of the agrarian sector in the regions of Russia. Theoretical significance of the research lies in clarifying the essence and content of state regulation of agrarian sector of economy, identifying its specificity and conditions of development for agricultural enterprises. In scientific work wide questions of analysis of development of state regulation of agroindustrial complex of Russian Federation are touched upon, including tendencies of development of agriculture of some regions. The basis of research was made by comparative analysis of target state programs aimed to improve state regulation of agrarian sector and designation of perspective regional target programs aimed to develop agroindustrial complex.
Sustainable development of the enantonym meanings under the influence of the context (on the German language material)
Authors: Ostrikova Galina
Published: April 2023

The article explores the concept of enantiosemy as a semantic category of language. Along with other categories of language, enantiosemy exists at all language levels: morphemic, grammatical, lexical, phraseological and syntactic. The article deals with enantiosemy units at the lexical, phraseosyntactic and syntactic levels of the German language. For the actualization of enantonyms, the context plays a decisive role. The meaning of enantiosemy lexical units is realized in the so-called “mixed” context, when several actualizers determine the meaning of units. At the phraseosyntactic level, syntactic phraseological units capable of expressing enantiosemy meanings, namely communicames, are considered. Interrogative sentences with enantiosemy rethinking are presented at the syntactic level. As a result of such rethinking, they receive the secondary meaning opposite to the direct one: more often negative and less often positive. The linguistic and extralinguistic context contributes to this. The last type of context is predominant in determining the meaning of enantonyms of different levels in the German language. The sustainable development of opposite meanings of enantonyms under the influence of context at all levels of the language is traced.
Application of piezoactuators in the technology of low-temperature preservation of fish reproductive cells
Authors: Ponomareva Elena , Firsova Angelina , Kovalenko Matvey , Polovinkina Mariya , Kuzov Anton , Alexandrova Uliyana , Pakhomov Victor
Published: April 2023

The sperm of Russian sturgeon (Acipenser gueldenstaedtii Brandt et Ratzeburg, 1833) was the research object. Acoustic-mechanical influence on sturgeon semen improves fish-biological and reproductive indices of the seminal fluid. The most optimal indices for reproductive cells of male Russian sturgeon are 500 Hz, 90 V with the exposure duration of 1 minute. It has been shown that when a piezo-actuator with a frequency of 500 Hz and an amplitude of 90 V is applied to the sperm mixture with the cryoprotectant, ice crystals are formed later, which may influence the survival of cells after defrosting.
Prospects for the development of commercial fish farming in the South of Russia
Authors: Matishov Gennady , Meskhi Besarion , Makoedov Anatoly , Ponomareva Elena , Grigoriev Vadim , Rudoy Dmitry , Sorokina Marina
Published: April 2023

The article presents the analysis and prospects of commercial aquaculture in the southern regions of Russia. Rostov and Astrakhan region and Krasnodar Krai are the leaders in commercial fish production. Rostov region annually grows 23-24 thousand tons. In Krasnodar region in the period from 2018 to 2022 there was a 15% growth of avcaculture production and in 2022 it was 23,3 thousand tons. In the Astrakhan region from 2018 to 2021 there was a decrease in this indicator by 13%, but in 2022 the volume of production in the region increased to 20.5 thousand tons. Absolute parameters in Stavropol Krai (11.8-12.3 thousand tons) Kabardino-Balkarian Republic (2.5-3.3 thousand tons) and Volgograd Oblast (2.3-2.5 thousand tons) remained almost unchanged. Significant growth of relative production parameters was noted in the Republic of Dagestan, the Republic of North Ossetia-Alania and the Republic of Crimea. The main objects of cultivation in the South of Russia are carp fish. A substantiation of creating a state-owned structure ensuring practical interaction between economic entities, executive bodies of state power, scientific and educational institutions is offered.
Mathematical modeling in the agro-industrial complex: basic problems and models construction
Authors: Rudoy Dmitry , Olshevskaya Anastasiya , Alentsov Egor , Odabashyan Mary , Prutskov Alexey , Onoiko Tatyana , Vershinina Anna , Kutyga Maxim
Published: April 2023

Currently, information technologies have been tightly integrated into agriculture. Since no computer calculations are possible without a powerful mathematical apparatus, the question arises about the possibility of modeling the processes occurring in agriculture with the help of modern achievements of science and technology. The present study is devoted to the existing methods of mathematical modeling in agriculture in relation to the applied aspects of agriculture. The aim of the research is to develop a critical approach to modern developments in the field of mathematical modeling and their place in agriculture. It is shown that the introduction of mathematical models based on modern scientific knowledge contributes to the optimization of agricultural processes and increasing the efficiency of any farm. Based on statistical studies, it is shown that among all branches of agriculture, mathematical methods are most often used in economic calculations, least of all, in calculations related to farm modeling. This is explained both by the complexity of modeling all processes occurring within a single farm, and by the loss of accuracy, which increases with the complexity of the system model.
Results of the seminars on HIV prevention in Tashkent city educational institutions
Authors: Mirkhamidova Sevara , Rustamova Hamida , Khudaykulova Gulnara , Azizova Feruza , Ilyasova Munisa
Published: April 2023

The article is devoted to the role of nurses in the prevention of immunodeficiency virus. Since nurses, by virtue of their activities, are closest to the sick and their families, they are able to create the most favorable atmosphere for them, which is very important for the success of treatment and control. Today's nurse is the foremost force of modern medicine. It plays an important role in the implementation of health reforms. Based on international requirements, the nursing education system is being improved.
Features of using modern information technologies in management activities
Authors: Mottaeva Angela , Issayeva Bibigul
Published: April 2023

Nowadays, the development of information systems has brought a number of changes. People are becoming aware of the importance of technology and information. At the same time, the government of many countries is trying in every possible way to support the development of information systems and technologies. Information technologies are part not only of people's daily lives, but also of the management systems of the sectors of the national economy, public administration, security and defense of the country, as well as ensuring the legal order. Such technologies contribute to the automation of numerous processes, which significantly increases productivity. This is caused by the fact that fewer resources are used. As a result, quality improves, efficiency increases, and costs are reduced. Thanks to information technology, it is possible to store more information, which greatly simplifies the process of making managerial decisions.
Impact of the digital economy on the development of economic systems
Authors: Mottaeva Angela , Khussainova Zhibek , Gordeyeva Yelena
Published: April 2023

The digital economy, which is based on new development concepts and driven by emerging technologies, relies on the application of information networks and platforms, renews factors and resources, and aims at high-quality and sustainable development as an important cornerstone for building a modern economic system. Digitalization affects most of the production processes and activities in the economy. In a period of rapid development of the digital economy, its significance is manifested in deep integration with economic and social industries, promoting digital transformation and constantly introducing new technologies, new models and new industry processes. This leads to the transformation and modernization of society, industry and enterprises, contributing to sustainable economic development based on innovation models. This paper discusses the importance of the digital economy in the modern economic system, which is expressed in an increase in production efficiency, the creation of new jobs, and a synergistic effect in various industries.
Project management in the system of education
Authors: Meirkhanova Yerkezhan , Kupeshova Saule , Mottaeva Angela , Dzholdosheva Tamara , Kamchibekov Tolobek
Published: April 2023

The purpose of this study is to identify universal methodological characteristics and general aspects of project management in the field of education (general principles, strategy, approaches, terms). The methodological conditions for the effectiveness of the preparation and use of the project are the relationship and interdependence of three approaches: a systematic approach that focuses on the implementation of the principle of reasonable sufficiency in the distribution of structural components in the organization; a situational approach that takes into account the characteristics of the external environment as a significant factor influencing the direction and content of changes in the organization; a behavioral approach that orients designers to understand the need to create conditions that have a beneficial effect on the behavior of people in organizational structures. Project management in education is a method of purposeful influence on the structure and processes taking place in the education system in order to transfer it to a qualitatively new state through a set of measures and actions. It is established that the project management model in education is a set of sequential actions at all stages, which ensures high efficiency of the process of finding a correspondence between the strategy of the organization in society and its basic components.
International economic policy of Iran, Pakistan and Kazakhstan within China ”Belt and Road” initiative
Authors: Rezaeinejad Ismael , Zeraat Peyma Sajjad , Zhen Dou
Published: April 2023

China’s “Belt and Road” Initiative is the most ambitious megaproject of the current international political economy. With this plan, China pursues economic growth goals, especially energy security, expanding its influence in various regions, accessing global markets, and creating more cost-effective communication and transportation systems. The idea of the project is to facilitate the supply of energy, goods and bring multiple parts of the globe closer to China. This article deals with the opportunities and challenges of cooperation between Iran, Pakistan, Kazakhstan, and China by relying on qualitative research methods such as document observation and analysis. In this regard, the main research question is what opportunities and challenges do the “Belt and Road” Initiative as China’s foreign policy strategy bring to Iran, Pakistan, and Kazakhstan? In response, the hypothesis raised to this research question is that this initiative, in addition to influencing the future of these three countries, could have positive geoeconomic consequences for them. This research notes that it can contribute to developing and deepening these countries’ relations with China by capacity building for regional dominance, simultaneously facilitating interaction with both East and West, diversifying the onshore and offshore routes and energy import bases, while also ensuring, facilitating, and enhancing energy transmission security for suppliers and consumers. Concerning the consequences for the region, it may assert China’s dominance over the geoeconomic structure of Iran, Pakistan, and Kazakhstan and intensify competition between Russia, India, and the U.S. in the region.
Kinematics study for a spatial manipulator
Authors: Oparina Ekaterina
Published: April 2023

For industrial robot design and control problems, it is necessary to determine both the positions of its parts relative to the stationary coordinate system, absolute positions of the parts, and their relative positions, generalised coordinates. The first problem is called the forward problem, and the second is the inverse problem for manipulator positions. The purpose of the paper is to solve the direct problem on manipulator positions, i.e., to determine and study positions of manipulator sections with known generalised coordinates. In the paper a spatial manipulator with four degrees of freedom is considered. Kinematic characteristics of the last link of the manipulator - grabber are defined. The kinematic characteristics are the coordinates of current position, velocity, and acceleration of the grip. Kinematic characteristics are found by applying the vector matrix method, based on the application of transition matrices from one reference system to another and rotation vector matrices. The vector matrix method belongs to the universal methods and is designed for use in mathematical computer simulation systems. Keywords: Vector matrix method, spatial manipulator, kinematic characteristics, mechanics of industrial robots.
Fagopyrum esculentum Moench plants’ photosynthetic activity correlation with efficient grading factors
Authors: Amelin A. , Fesenko A. , Zaikin V. , Chekalin E.
Published: April 2023

About 95% of dry matter of agricultural crops is known to be provided by photosynthesis of plants. At the same time, its potential is realized by less than half: the efficiency of use of PAR by crops is usually in the range of 0.9 -1.5%, at best it reaches 2%. Obviously, activation of photosynthetic activity of plants by means of breeding can be considered as one of the promising ways to increase crop yields. This task is also relevant for buckwheat, which is a demanded food crop in the world market. In this regard, the purpose of the research was to study the possibility of using in buckwheat breeding the indicators of photosynthetic activity of plants based on their relationship with useful - economic characteristics of the variety. The results of the correlation analysis showed that the indicators of photosynthetic activity of buckwheat plants have a significant impact on the formation of the variety yield. Significant relationship of cultivar yield was revealed with leaf area (r=0.71), water use efficiency (r=0.68), photosynthetic potential (r=0.66) and photosynthetic intensity (r=0.35). Similar character of interrelation of these indicators in crop varieties was traced with harvesting index. It was found that the relationship between the structural and functional indicators of the leaf system of plants and the yield of buckwheat varieties does not remain constant, and significantly changes during the growing season of plants. The high polymorphism of the crop gene pool in terms of photosynthetic activity of plants and their significant relationship with the yield of the variety indicate the possibility of targeted breeding work in this direction.
Human capital and the knowledge economy as key challenges of post-industrial society
Authors: Guz Natalya , Kvashnina Margarita
Published: April 2023

The article examines human capital, which is becoming not just a determinant of competitiveness, but also the dominant form of social wealth, the basis of intellectual and social capital as a condition for not only economic but also civilizational progress as a whole. Against the background of economic globalization, fundamentally different economic relations and production relations are developing, closely connected with changes in social and labor relations, in particular in forms of employment. The problems of formation and development of human capital in the modern world are connected with the fact that, on the one hand, humans create the latest systems, including technology, technological knowledge, high-tech production processes, market opportunities, which need to be competently and comprehensively managed. On the other hand, it is important not only to manage these processes competently, but also to constantly improve them, developing in turn the professional component in order to ensure the competitiveness and strategic sustainability of the company or state.
Special aspects of risk management of the transition to a low-carbon economy
Authors: Eliseeva Ekaterina
Published: April 2023

The purpose of this work was to assess the opportunities and problems of risk management of the transition to a low-carbon economy in the current development of society. In modern conditions, sanctions against the sale of hydrocarbons, logistics violations, volatility in the oil and gas market, open up wide opportunities for the implementation of the declared “green” economy. But developed countries are faced with a situation where the use of renewable energy sources looks extremely unprofitable, European states are forced to switch to saving electricity, and in some cases governments are bound to return to previously rejected “dirty” technologies – the use of coal and brown coal. To assess the possible risks of the transition to a low-carbon economy, an empirical study was conducted among specialists of Russian and joint enterprises in the energy sector, oil production and refining industries, and the petrochemical complex. The following methods of research were used: comparative, structural and system analysis, sociological research methods (survey, conversation), methods of mathematical statistics. As a result of the conducted research, it was found that the current difficult political situation, the impact of the sanctions on economy, the decline in the standard of living of the population in many developed countries, increasing inflation lead to the fact that previously declared plans to build a “green” economy are exposed to significant risks. In this situation, the Russian Federation, despite the sanction restrictions, has great potential for a successful transition to a low-carbon economy and compliance with the declared international requirements to reduce greenhouse gas emissions. The expert survey made it possible to identify the main risks of Russia’s successful transition to a low-carbon economy. The results of the study indicate the need for further research on the risks of transition to a low-carbon economy both globally and nationally.
Towards building a firm metaverse security base
Authors: Li Anmin , Yao Xiaohui , Gu Haiying , Zhang Yungeng , Chang Yuan
Published: April 2023

The Metaverse is a significant field that is currently receiving considerable attention from both the industry and academia. The transformation of the Metaverse from science fiction to reality is being actively promoted by technology, industry, and capital. However, the development of the Metaverse is still in its early stages, and the system architecture and theoretical technology of the Metaverse are not yet mature. This paper provides a comprehensive analysis of the Metaverse and summarizes its holographic, omnipotent, multidimensional, and multifaceted characteristics. The development of the Metaverse is founded on the relevant infrastructure, and we elaborate on the primary components of the Metaverse infrastructure. Furthermore, we systematically summarize the security risks inherent in the Metaverse infrastructure. Based on this, we propose utilizing the system security technology concept to guide the construction of a Metaverse security protection system from various perspectives at each level of computing, cloud, network, digital assets, and terminals, in order to construct a secure foundation for addressing the Metaverse’s security risks and challenges.
Sorge vor Covid-19-Infektion und das Risiko für
Burnout-Symptome: eine Studie zur Belastung von Pflegekräften in
Brandenburger Pflegeheimen während der Covid-19-Pandemie
Authors: Uhlenbrock Greta , Schulze Susanne , Sappl Isabella , Rapp Michael A. , Tallarek Marie , Spallek Jacob , Holmberg Christine
Published: April 2023

Ziel der Studie Untersuchung der Assoziation von Sorge vor eigener
Infektion oder der Infektion von Freunden, Familie und Pflegebedürftigen
mit Covid-19 und Burnout-Symptomen von Pflegekräften in Brandenburger
vollstationären Altenpflegeeinrichtungen.

Methodik Querschnittliche Befragung von Pflegekräften
(n=195) in Brandenburger Pflegeheimen zwischen August und Dezember 2020
hinsichtlich ihrer psychosozialen Belastung am Arbeitsplatz.

Ergebnisse Das Vorliegen der Sorge, sich selbst, Familie und/oder
Freunde oder Pflegebedürftige mit Covid-19 infiziert zu haben, ist mit
einer erhöhten Ausprägung von Burnout-Symptomen assoziiert
(b=0,200, t(155)=2,777, p=0,006).

Schlussfolgerung Ein erhöhtes Erleben von Burnout-Symptomen durch
die Sorge eines Infektionsrisikos mit Covid-19 am Arbeitsplatz spricht
für den Bedarf umfassender Unterstützungsmaßnahmen sowie
nachhaltiger Konzepte zum Umgang mit psychosozialer Belastung für
Pflegekräfte in der Altenpflege.
Johannes Müller (1801–1858) und seine Schule – Wegbereiter und Gigant der deutschen Physiologie
Authors: Koehler Ulrich
Published: April 2023

Um die Mitte des 19. Jahrhunderts war Johannes Müller der unbestritten vielseitigste und genialste Physiologe seines Zeitalters. Müller wurde im Jahre 1801 als ältestes von 5 Kindern in Koblenz geboren. Er erhielt eine hervorragende Ausbildung in Mathematik und den alten Sprachen und konnte so die Schriften von Aristoteles im Original mühelos lesen.

Nach dem Abitur 1818 diente er ein Jahr bei den Pionieren, 1819 immatrikulierte er sich an der Universität in Bonn. 1821 erhielt er, noch als Student, den Universitätspreis für seine wissenschaftliche Arbeit über die Atmung des Fötus. Müller wurde 1822 in Bonn promoviert und ging anschließend nach Berlin, wo er Vorlesungen des Anatomen Karl Asmund Rudolphi gehört hat.

1824 habilitierte er sich in Bonn für Physiologie und vergleichende Anatomie. Nach seinen Bonner Jahren folgte er 1833 dem Ruf an die Berliner Universität auf den Lehrstuhl von Rudolphi. In Berlin erschien sein berühmtes „Handbuch der Physiologie“ (1833–1840). Müllers Arbeitsgebiet betraf die Physiologie, die Humananatomie sowie die vergleichende zoologische Anatomie und pathologische Anatomie.

Müller hat eine Vielzahl an Publikationen und Schriften hinterlassen. Er und seine zahlreichen Schüler (Emil du Bois-Reymond, Ernst Haeckel, Hermann von Helmholtz, Friedrich Gustav Jakob Henle, Carl Ludwig, Theodor Schwann und Rudolf Virchow etc.) begründeten den Weltruhm des Berliner Physiologischen Instituts. Die Anfang des 19. Jahrhunderts vorherrschende naturphilosophisch ausgerichtete Denkweise der Medizin wurde durch Müller mehr und mehr durch eine naturwissenschaftlich orientierte ersetzt.
Anterolateral Thoracotomy: A Novel and Simple Technique to Improve the Closure Using the Self Locking Knot
Authors: Cabrera Vargas Luis Felipe , Pedraza Mauricio , Mantilla-Sylvain Fabien , Garavis Montagut Isabella
Published: April 2023

Thoracotomy is defined as an incision made by the surgeon in the chest wall in order to allow visibility of the thoracic cavity content. This can be used by surgeons to treat thoracic cavity content diseases including the heart, lungs, esophagus, and other organs. Thoracic incision closure remains an item with no consensus. Therefore, we present an easy way and give a little tip for closure using the slipknot that will allow the correct approach of ribs and the successful closure of the intercostal space.
Outpatient Use of Monoclonal Antibodies Casirivimab and Imdevimab in Pregnancy for Mild-to-Moderate Coronavirus Disease 2019
Authors: Buonomo Antonio Riccardo , Filippo Isabella Di , Esposito Nunzia , Saccone Gabriele , Nobile Mariano , Viceconte Giulio , Villari Riccardo , Carlo Costantino Di , Bifulco Giuseppe , Gentile Ivan
Published: April 2023

Objective The aim of this study was to report the use casirivimab/imdevimab therapy in pregnant women with moderate coronavirus disease 2019 (COVID-19).

Study Design We report 12 cases of unvaccinated pregnant patients with mild-to-moderate COVID-19 treated with casirivimab/imdevimab.

Results Twelve unvaccinated pregnant patients with mild-to-moderate COVID-19 received casirivimab/imdevimab at the dose of 1200/1200 mg by intravenous infusion over 60 minutes. All women were managed outpatient. None experienced severe adverse drug reaction and none progressed to severe disease.

Conclusion Casirivimab/imdevimab should be considered for outpatient treatment of unvaccinated pregnant women with mild-to-moderate COVID-19 to decrease the risk of severe disease.

Key Points
Cone Beam Computed Tomography and Virtual Cloning: A Review
Authors: Sarkar Anand Shankar , Hegde Shruthi , Ajila Vidya , Darwin Deepthi
Published: April 2023

With the use of technologies, dental office workflow is moving toward a more efficient and cost-effective approach. Digitalization of dental records and computer-assisted imaging techniques have simplified workflow. Innovation and introduction of cone beam computed tomography, proface (facial three-dimensional [3D] soft-tissue capture), intraoral scan, planning software, and 3D printers has changed the dental profession. Clinical practice uses virtual workflows, and digital dentistry is a new development. The purpose of this article is to update the dental professionals with different available technologies for the creation of a virtual patient and digital tools that can be used for diagnosis, treatment planning, and follow-up of patients. The advantages of digital dentistry and future scope are highlighted in this article.
Birth Brachial Plexus Palsy: An Indian Perspective
Authors: Thatte Mukund R. , Shah Harsh R. , Hiremath Amita
Published: April 2023

Birth brachial plexus palsy (BBPP) is an unfortunate outcome of a difficult labor, which can often lead to long-lasting upper limb impairments. Spontaneous recovery may or may not occur. Timely diagnosis of the condition and initiation of the appropriate treatment can be instrumental in decreasing the functional impact. The management begins right from the day the child presents first and ranges from physiotherapy to surgical intervention such as nerve repair/transfer or grafts. The sequelae of the condition are also quite common and need to be detected preemptively with initiation of appropriate treatment. However, prevention is the key to reducing the incidence of secondary deformities. In this study, the team of authors, based on their considerable experience, discuss their approach to the management of BBPP. This is done in the background of Indian cultural practices and social constraints. A detailed discussion has been done on importance of preoperative passive joint mobilization regime and role of botulinum toxin in the authors' preferred ways of surgical correction of primary as well as secondary deformities. An extensive review of peer-reviewed publications has been done in this study, including clinical papers, review articles, and systematic review of the subject. Good results are possible with early and appropriate intervention even in severe cases.