bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Socioeconomic and Technology Response on Education in Kenya During the Covid-19 Pandemic
Authors:   Department of Science & Mathematics Education, Kibabii University, Bungoma, Kenya., Duncan Wasike Wekesa , Wambeye Kimweli Marakia ,   Department of Education Planning and Management, Kibabii University, Bungoma, Kenya.
Published: February 2022

The social and economic effects of COVID-19 will be severe. Schools have a particularly important role to play. Coronavirus-related disruption can give educators time to rethink the sector. Technology has stepped into the breach and will continue to play a key role in educating future generations. With students being able to gain access to knowledge and even learn a technical skill, through a few clicks on their phones, tablets and computers. This may mean that the role of educators will need to move towards facilitating young people’s development as contributing members of society. The move toward universal internet would help prepare educators to provide education under future health emergencies-not to mention the many broader benefits, such as equalizing economic opportunity in the information age. Digital technologies are playing a critical role in the global fight against the COVID-19 pandemic. Media, and especially social media, can also be used to educate students about the virus itself and to teach basic hygiene and debunk myths and misinformation. Considering the impacts of the national lockdown on behavioural change, the significant socio-economic inequity and a lack of cash, food and access to chronic medication among the poor posed great threats in education. This research will enable government policy groups to develop a more targeted and effective approach in addressing the effects of the pandemic on education. Keywords: Online Education, social media, Corona Virus (COVID-19).
The Constitutionality of California's Cap-and-Trade Program and Recommendations for Design of Future State Programs
Authors: Alcorn Thomas
Published: February 2022

Global climate change has emerged as one of the greatest challenges of our time. While action has stalled on the national stage, states have started to take action to reduce their greenhouse gas emissions. Confronted with the risk of severe impacts that could cost it tens of billions of dollars annually by the end of the century, California has taken the lead and developed the first comprehensive cap-and-trade program in the nation and seeks to achieve significant reductions in the greenhouse gas emissions associated with its economy. The success of California’s program will determine whether other states and the federal government follow California’s lead. If California’s cap-and-trade program is defeated by legal challenges or is excessively economically burdensome, it might spell the end of cap-and-trade programs in the United States. The most formidable legal challenge will be brought under the dormant Commerce Clause, which prohibits states from discriminating against, regulating, or unduly burdening interstate commerce. This Article analyzes California’s cap-and-trade program under the dormant Commerce Clause and suggests refinements that could be adopted by California or other states implementing cap-and-trade programs to improve the odds of prevailing against such a challenge. While California will almost certainly be forced to make regulatory concessions, especially in its regulation of the electricity sector, I conclude that state cap-and-trade programs can be structured in a way that, while not ideal, can survive dormant Commerce Clause scrutiny while providing meaningful regulation of greenhouse gas emissions and protection from emissions leakage.
TREINAMENTO RESISTIDO É RECOMENDÁVEL PARA ADOLESCENTES E CRIANÇAS?
Authors: Oliveira José Ricardo Lourenço de , Passos Ricardo Pablo , Pereira Adriano de Almeida , Carvalho Alexandre Freitas de , Martelli Anderson , Carvalho Anderson dos Santos , Lima Bráulio Nascimento , Martins Gustavo Celestino , Almeida Klebson da Silva , Silio Luis Felipe , Rodrigues Marcelo Francisco , Maneschy Mariela de Santana , Abdalla Pedro Pugliesi , Guedes Uebister Igor Dos Santos , Fileni Carlos Henrique Prevital , Vilela Junior Guanis de Barros , Oliveira Heleise Faria dos Reis de
Published: February 2022

Contemporaneamente, o treinamento resistido tem sido muito procurado para melhorar os ganhos de massa muscular e crianças e adolescente, não tem ficado fora, já que há um tempo atrás, treinamentos para crianças e adolescente não eram bem vistos. Portanto, o objetivo desta pesquisa foi demonstrar que a musculação não traz malefícios para crianças e adolescentes que praticam de forma correta e recebem orientações de um profissional. Para tanto, surgiu o seguinte questionamento: O treinamento resistido pode trazer problemas de crescimento ou de desenvolvimento para para crianças e adolescentes que praticam? Desta forma, a pesquisa trata de quebrar o mito de que crianças e adolescentes podem ou não praticar musculação, mostrar a forma correta da dos exercícios na prática e os cuidados necessários, conforme a pesquisa bibliográfica utilizada como principai base para o desenvolvimento do tema. Sendo assim, é possível encontrar fontes confiáveis e evidencias do que é e não é positivo. Com isso, pode-se concluir que o treinamento resistido para crianças e adolescentes é benéfico se for praticado de forma moderada, assim como, qualquer outro esporte, mas se a prática for dirigida de forma excessiva, o praticante pode correr riscos de saúde em relação ao seu desenvolvimento maturacional.
ATIVIDADE FÍSICA NA PROMOÇÃO DA SAÚDE
Authors: Vilela Junior Guanis de Barros , Oliveira Heleise Faria dos Reis de , Pereira Adriano de Almeida , Carvalho Alexandre Freitas de , Martelli Anderson , Carvalho Anderson dos Santos , Lima Bráulio Nascimento , Martins Gustavo Celestino , Almeida Klebson da Silva , Silio Luis Felipe , Rodrigues Marcelo Francisco , Maneschy Mariela de Santana , Abdalla Pedro Pugliesi , Guedes Uebister Igor Dos Santos , Fileni Carlos Henrique Prevital , Oliveira José Ricardo Lourenço de , Passos Ricardo Pablo
Published: February 2022

No mundo contemporâneo, observa-se que desde a infância os indivíduos são influenciados ao uso das tecnologias de maneira excessiva, tornando o sedentarismo cada vez mais presente na vida dos seres humanos. O sedentarismo tem se destacado como um dos fatores negativos para o surgimento de doenças. Para tanto, objetivou-se descrever como a prática da atividade física é capaz de promover a saúde dos indivíduos. Sendo assim, levantou-se a seguinte questão problema: como a prática de atividade física auxilia na promoção da saúde? A metodologia utilizada foi uma pesquisa bibliográfica descritiva, através de base de dados, como: Scielo; Google Acadêmico, além de artigos disponíveis em bibliotecas digitais, sendo utilizadas palavras-chaves, tais como: atividade física; sedentarismo; saúde. Concluindo-se que a prática da atividade física é relevante para a saúde e bem-estar do ser humano, pois auxilia na prevenção e tratamento de doenças.
UKRAINIAN LAND MARKET MODEL – EXCLUSIVE OR «HYBRID» OF THE LATIFUNDIST MODEL?
Authors: ZAKHARCHENKO Volodymyr
Published: February 2022

The article considers topical issues of land reform in Ukraine in the context of the introduction of the Ukrainian model of the agricultural land market (AL). The purpose of the study is a comparative analysis of the official and author's models of the market turnover of ALs in order to increase the strengths and neutralize the weaknesses of the first of them and turn it into an exclusive model, rather than a copy of the worst variants of the baseline models. It is shown that the state model, which is practiced in Israel, China and other countries, is based on lease land relations - between the state, as the owner of the land, and collective agricultural enterprises, and these relations are regulated by the state land authority. It is determined that the farming model, as the most common and effective, has in its basis a private form of ownership of land, which is cultivated mainly by small and medium farms, and lease land relations are complemented by the market. And these relations, as in Poland, are regulated by state and self-governing bodies. It has been established that the latifundist model of the AL market is also based on private ownership of land, but the main market entities are not farms, but agricultural holdings. Within the framework of this model, land relations between the market entities are oriented mainly on land grabbing and are usually regulated by the general competence authorities. In general, this model is the most threatening to the food security of many countries where it is practiced, such as Madagascar, and the sustainable development of their rural areas. It is justified that the Ukrainian model of the AL market from July 21, 2021 to January 1, 2024 will have many signs of a farming model. But since then, it should not become a «hybrid» of the latifundist, but a combined version of the farm and state models. At the same time, the emphasis should be placed not on the privatization of land, but on their effective use, based on the advantages of the lease form of the land circulation, which are associated with the introduction of long-term lease, increasing its price and transferring to the electronic form.
METHODOLOGICAL ASPECTS OF ANALYSIS OF FINANCIAL SECURITY MANAGEMENT OF THE ENTERPRISE
Authors: FEDORYSHYNA Lidiya
Published: February 2022

The article reveals the essence and analyzes the structural and elemental content of the concept of «financial security of the enterprise». It is established that the categorical essence of financial security is mediated by the environment of the business entity and is formed by the relations into which it enters in the process of its practical activity. It is recognized that the financial security of the enterprise should be interpreted as the ability to counteract existing and possible dangers and threats that can and can cause financial damage, transform the capital structure or bring the enterprise to bankruptcy. It is investigated that ensuring the appropriate level of financial security of agricultural enterprises is possible through its management system.
The structured system of financial security management of the enterprise is given, which includes the list of external and internal threats, tasks and management algorithm, as well as subsystems of methodical, normative-legal, financial, technical, informational, organizational, personnel support.
The methodical tools of monitoring, analysis and assessment of the level of financial security of the enterprise are concretized and systematized. It is proved that the assessment and analysis of financial security is a monitoring of key socio-economic indicators and their comparison with the threshold values. The principles of formation of tools for assessing the financial security of the enterprise are given.
The characteristic of methodical approaches concerning quantitative and structural filling of tools of an estimation of a level of financial safety of the enterprise is given.
For a comprehensive assessment of the level of financial security of enterprises, it is proposed to use structured groups of indicators in the areas of financial analysis. The structural-logical algorithm of practical realization of methodical approaches of the analysis of management of financial safety of the enterprise is developed.
INFORMATION SUPPORT FOR MONITORING THE STATE OF THE GRAIN INDUSTRY OF UKRAINE IN THE CONDITIONS OF EURO INTEGRATION
Authors: PRAVDIUK Nataliia , BURKO KATERYNA
Published: February 2022

The needs of information support for monitoring the state of the grain industry at different levels of management are investigated. For the purposes of European integration, economic and management processes must be brought to the EU requirements, in particular Directive 1306/2013 Financing, management and monitoring of agricultural policy. The analysis of the grain industry of Ukraine in terms of production indicators, international measurement production of grain crops is carried out. The dynamics of the balance of grain crops in Ukraine for 2015-2020 is studied. The methodological foundations of the formation of basic indicators for monitoring the grain industry are generalized, the components of the structure of its information support are highlighted. The definition of information support for monitoring the grain industry as a process of scientifically grounded collection of data on the selection of objects of observation, systematization and generalization in order to ensure the management process for the formation of an effective agricultural policy is given. Based on the analysis of the state, the features of information resources of the market of services for the production of domestic consumption and export are formed. The needs of managing the grain industry at the micro, meso and macro levels are highlighted. The main directions of monitoring at the macro level for state support for the development of the industry are formulated. Peculiarities of grain industry expenses are revealed on the example of normative materials accompanying the accounting on the chain of formation of value added of the grain industry of agro-industrial complex in the sphere of processing. The features and the need for monitoring the development of the grain industry are investigated and its main criteria for the formation of a national grain strategy, coordination of its development with the situation in the world and the EU are described. The review of measures, contributing to the further development of information support of the grain industry of Ukraine, is carried out.
ASSESSMENT OF THE LEVEL OF COMPETITIVENESS
OF AGRICULTURAL ENTERPRISES ON THE BASIS OF NEURAL
NETWORK MODELING
Authors: CHIKOV ILLYA
Published: February 2022

The article investigates the topical issue of quantitative assessment of the competitiveness of agricultural enterprises. In the framework of this work, it was determined that the specifics of agricultural enterprises do not allow the use of existing approaches to assessing the competitiveness that can be used for enterprises of other activities. Accordingly, the aim of the research was to develop an approach to quantifying the competitiveness of agricultural enterprises that would take into account the specifics of the enterprise, and which could be adapted to assess the effectiveness of other economic systems.
Based on the developed economic literature of Ukrainian and foreign scholars, an analysis of approaches to the interpretation of the concept of «competitiveness» as an economic category.
Due to the lack of a single interpretation of the economic characteristics of the enterprise as an «indicator of competitiveness», it was determined that the it should be considered as a latent characteristic, i.e., one that manifests itself on the «surface» of a set of lower factors. At the same time, an analysis of modern approaches to quantifying the competitiveness of enterprises was carried out.
The paper analyzes the approaches to quantifying the competitiveness of agricultural enterprises.The author’s neural network model of integrated assessment of competitiveness of agricultural enterprises was developed, which is based on the synthesis of principles of neural network modeling, methods of determining integrated indicators, work with latent indicators, taxonomy.
The calculations presented in this paper were performed in the environment of the author’s computer program «ASCO». The model of estimation of competitiveness of the agricultural enterprises is carried out. The analysis of the enterprise on the basis of simultaneous processing of primary factors and group factors with the subsequent analysis of quality of controllability of system is carried out. This approach allows for a comprehensive analysis of the enterprise in all areas of its activities.
Movement, Feeding Behaviour and Threats of Colobus guereza Ruppellin at Seasonally Dry Riverine Forest of Engare-Olmotonyi and Arboreta of the Forestry Training Institute’s Olmotonyi’s Campus in Northern Highlands of Tanzania
Authors: Kayombo Canisius John , Kivuyo Tumaini , Giliba Richard A. , Kyando Sefania J. , Lugumira Emmanuel , Gwau Hussein Said
Published: February 2022

The observation of feeding and movement behaviour of wild fauna is significant in the process of understanding the ecosystems. The movement and feeding behaviour of An assessment on the movement, feeding behaviour, and threats of Colobus guereza was done in Engare-olmotonyi seasonally dry riverine forest and arboreta at the Forestry Training Institutes-Olmotonyi in northern Tanzania. The movement and feeding behaviour were monitored for 30 days from mid of September to October 2020. Sleeping and waking up times, trees fed by C. guereza, and trees they slept on were recorded and estimated for their height and canopy cover (light or dense). The human threats were also recorded. The findings revealed that C. Guereza members were waking up between 6.30 am and 6.58 am, depending on the condition of the sky (clear or cloudy). When the sky was clear they wake up between 6.30 and 6.45 am, and 6.45 am to 6.58 am on cloudy sky days. They slept on the highest canopy trees and were feeding on tender or mature leaves depending on the type of species. The flowers and fruits of Jacaranda mimosifolia, Albizia gummifera (J.F.Gmel.) C.A.Sm., Cussonia holstii Harms ex Engl and leaves of Lagenaria abyssinica (Hook.fil.) C.Jeffrey were found to be fed by C. guereza. As soon as they wake up, they both of them urinated. Then, young C. guereza were found to be directed to move before adults just after they had urinated. The height of trees the C. guereza were found to jump on and or sleep ranged from 24 ± 10 m, with an average height of 17 m. The tallest trees ranged from a height of 24 ± 20 m; while the medium had a height of ≤ 20 ± ≤15 m. Most of the tallest trees were Albizia gummifera (J.F.Gmel.) C.A.Sm., Jacaranda mimosifolia D.Don; Cussonia holstii Harms ex Engl.; and Eucalptys maidenii F. Muell. The threats to C. guereza were cutting of trees as their food and habitat and illegal routes that disturbed their behaviour of feeding and movement. The direction of C. guereza movements and sleeping depend most on the trees.  Further study is needed to evaluate the plant species being fed at different seasons, protect the existing trees, and restore the forest gaps.
THE ROLE OF NEOLOGISMS IN THE LANGUAGE OF MODERN MEDIA
Authors:   Undergraduate Student, National University Of Uzbekistan Named After Mirzo Ulugbek, Tashkent, Uzbekistan, Kurbanova Muhlisaxon
Published: February 2022

At this stage of the development of Russian studies, the study of not only the lexical system itself is characteristic. A study of processes, the study of which is engaged in neology, considering the emergence of new words, new trends in word formation, stylistic compatibility of neologisms, etc. becomes relevant.
COMPARATIVE ANALYSIS OF THE SOMATIC PHRASEOLOGICAL UNITS OF THE ENGLISH AND RUSSIAN LANGUAGES WITH THE COMPONENT “HEART”
Authors:   Fergana State University, Uzbekistan, Usmonova Dona Sotvoldievna
Published: February 2022

This article demonstrates peculiarities of somatic phraseological units both Russian and English languages and gives the results of a comparative investigation of somtisms with the component “heart”. Linguocultural aspect of linguistics has been taken into consideration while doing research on comparing phraseological units of the languages. Paremia has been emphasized as a significant component of the conducted analysis.
A COMPARATIVE STUDY OF PHRASEOLOGICAL UNITS VERBALIZING THE CONCEPT OF "LOVE" IN ENGLISH AND UZBEK
Authors:   Teacher, Fergana State University, Uzbekistan, D.I. Mirzayeva
Published: February 2022

This article is a comparative analysis of the phraseological units in English and Uzbek that verbalize the concept of "love", which explores the similarities and differences between the phraseological units in both languages, revealing the factors that require them.
ENGLISH, GERMAN AND FRENCH LOANWORDS IN UZBEK LANGUAGE
Authors:   Second Year Master Student, Fergana State University, Uzbekistan, Abdurazzoqova Ziyoda Baxtiyorjon Qizi
Published: February 2022

It is possible that each small change can make great importance in our modern life. Like this, loanwords which we never pay attention in usual conversations are also regarded as significant units the subject of linguistics. Mainly, the process of borrowing them is special theme, having many strategies and ways and generally they are called as a adaptation. Such kind of adaptations are noted in Uzbek language also and these are so much efficient for professional language learners.
MicroRNAs as Potential Biomarkers for the Diagnosis of Inflammatory Bowel Disease: A Systematic Review and Meta-analysis
Authors:   Xi’an Children’s Hospital, Shaanxi Research Institute for Pediatric Diseases, The Affiliated Children’s Hospital of Xi’an Jiaotong University, and National Regional Medical Center for Children (Northwest)., Sun Lina , Han Yanan , Wang Hua , Liu Huanyu , Liu Shan , Yang Hongbin , Ren Xiaoxia , Fang Ying
Published: February 2022

Review question / Objective: The purpose of this systematic review was to systematically review the clinical studies regarding miRNAs as diagnostic biomarkers for inflammatory bowel disease and assess the overall diagnostic accuracy of miRNAs. Condition being studied: The symptoms of inflammatory bowel disease (IBD) are highly variable. The diagnosis of IBD must be made through medical history, physical, laboratory, radiologic, endoscopic, and histological examinations. However, these diagnostic techniques are not specific and sometimes even equivocal. Therefore, reliable biomarkers are urgently needed in the diagnosis of IBD. Several clinical and preclinical researches have shown that dysregulated microRNAs (miRNAs) play a crucial role in IBD development. miRNAs, as single-stranded noncoding RNAs that contain 22-24 nucleotides, can post-transcriptionally regulate gene expression by blocking mRNA translation or degrading target mRNAs. miRNAs are widely involved in physiological and pathological cellular processes, such as differentiation, proliferation and apoptosis. Besides, they are stable, noninvasive, and resistant to degradation by ribonucleases, making them valuable targets in the diagnosis, monitoring, prognosis, and treatment of diseases. To date, inconsistent results have been found about miRNA expression profiling in the patients with IBD. Moreover, the diagnostic accuracy of miRNAs for IBD has not been reported in any meta-analysis.
Information decision-making support for periodic maintenance of gas balloon equipment
Authors:   National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Evstifeev Andrew A.
Published: February 2022

The issues of information support for decision-making during periodic maintenance of gas-cylinder equipment of vehicles running on natural gas, ensuring safe operation, contributing to an increase in the efficiency of transportation of goods and goods: reducing vehicle downtime due to failure of the fuel system using gas fuel by 10–18%; reducing the likelihood of functioning of gas equipment in hazardous modes by 12–17%. The technical requirements for gas equipment and procedures for its periodic maintenance are formulated. The concept of the formation and application of a unified state register of gas equipment, which is a tool for limiting admission to the turnover of products that does not meet regulatory and market requirements, is proposed. An information-logical model of decision-making support has been developed, which allows, depending on the current technical condition of assemblies and parts, based on the specified requirements for the duration of the period between maintenance, to propose the best option for carrying out diagnostic, repair and commissioning measures for gas-cylinder equipment of vehicles. The procedure for the formation of an extended list of measures for periodic maintenance of gas equipment is presented on the example of individual nodes of the fuel system of a vehicle running on compressed natural gas. The software implementation of the information- logical model is carried out in the form of a plug-in extension to the database core of the decision support information system for the operation of gas equipment, implemented on the Oracle database management system with integrated support for the high-level object- oriented language Java. For the convenience of working with the information-logical model, a computational and analytical module of the information system for decision-making support during the operation of gas-cylinder equipment with elements of fuzzy logic has been developed. The model was tested on the example of the implementation of measures during the periodic maintenance of the gas equipment of the KamAZ 65116 truck.
Fuzzy relational cognitive temporal models for analyzing and state prediction of complex technical systems
Authors:   Branch of the National Research University ", Borisov Vadim V. ,   MPEI",   in Smolensk, Kurilin Sergey P. ,   Branch of the National Research University "MPEI" in Smolensk, Luferov Victor S. ,   Branch of the National Research University "MPEI" in Smolensk
Published: February 2022

The effectiveness of fuzzy cognitive modeling methods for analyzing and predicting the state of complex technical systems (STS) is justified by the following reasons: significant interdependence, non-linear nature and incompleteness of information about the mutual influence of the analyzed parameters of the CTS; a variety of effects of internal and external factors on the CTS; complexity and cost of conducting experimental studies during the operation of these systems. The main limitations of fuzzy cognitive models for modeling STS dynamics are: the complexity of taking into account the mutual influence of parameters with their different time lags relative to each other; the need for their constant operational adjustment and training of component models for all parameters during the operation of the CTS. In this paper, Fuzzy Relational Cognitive Temporal Models (FRCTM) are developed. These models combine the advantages of various types of fuzzy cognitive models, and at the same time neutralize the main limitations of the analysis and prediction of the state of the CTS, which are inherent in the well- known fuzzy cognitive models. The paper also proposes models of system dynamics that take into account the specifics of the FRCTM. We have also developed an approach and implemented a method for calculating fuzzy dependencies in vector-matrix form for dynamic modeling of the CTS. The proposed method makes it possible to solve the problems of increasing the uncertainty of the results and the output of fuzzy values of the FRCTM concepts beyond the ranges of the base sets due to the execution of mass iterative computations. An example of modeling heterogeneous electromechanical systems based on FRCTM is given. The results obtained are the basis for solving a whole range of tasks of analysis, predictive evaluation, modeling of different scenarios of the functioning and development of heterogeneous electromechanical systems for various system factors, operating modes and external conditions.
Synergy of econometric approach and use of neural networks to determine factors of provision of transport and logistics infrastructure in regions of Russia
Authors:   Orel State University named after I. S. Turgenev, Zubanova Anastasiya E. , Morozov Artem A. ,   Orel State University named after I. S. Turgenev, Trubin Alexander E. ,   Synergy University, Aleksahin Alexander N. ,   Synergy University, Novikov Sergey V. ,   Orel State University named after I. S. Turgenev
Published: February 2022

The article justifies actuality of application of neural network methods for identification of significant predictors of the transport and logistics infrastructure of regions of the Russian Federation. The condition of the logistics industry of the Russian Federation in comparison with foreign countries has been analyzed. It was concluded that it is necessary to increase the accuracy of estimation of indicators of transport and logistics infrastructure of regions in order to identify their impact on the development of logistics. The problem of the traditional methodology of building a model of transport and logistics infrastructure of regions based on the application of mathematical and econometric analysis lies in the inability of the latter to find and accurately describe the non-obvious dependencies in the data. The expediency of sequential coupling of econometric and neural network research tools has been determined. The two-step procedure of identification of factors influencing the logistics development of the Russian Federation has been tested. As a result, it was possible to select the most significant socio-economic (average per capita income of the population, retail trade turnover, imports of the subjects of the Russian Federation) and infrastructure factors (the share of paved roads, the shipment of goods by public rail, the departure of passengers by public rail, the density of public railway) logistics infrastructure on the basis of an econometric approach. In the second step of the study, a neural network model of the remaining factors was developed based on the development of classification trees and a neural network, acting as a kind of computational filter, which allowed solving the problem of attribution of macroeconomic data and achieving a high level of significance of forecasts. The proposed approach of sequential coupling of econometric methods and neural network modelling has universality and practical importance, therefore it is applicable to the study of a wide range of macroeconomic processes.
Algorithm for predicting the parameters of a system for processing waste apatite-nepheline ores
Authors:   Branch of the National Research University ", Puchkov Andrey Yu. ,   MPEI",   in Smolensk, Lobaneva Ekaterina I. ,   National Research University "MPEI", Kultygin Oleg P. ,   Synergy University
Published: February 2022

Within the framework of the concept of a circular economy, research in the field of creating technological systems for recycling waste from mining and processing plants occupies one of the key positions. This is connected, on the one hand, with significant volumes of such waste, reaching tens of millions of tons and posing a significant environmental hazard to air and water basins, human health, and, on the other hand, with their rich chemical and mineralogical composition, which makes it possible to call them accumulations of technogenic deposits. In this regard, the task of creating control systems for technological processes of processing such waste and their information support, including support for all stages of the passage of information processes, is urgent. The novelty of the presented research lies in the proposed structure of an intelligent control system for a complex chemical and energy technological system for processing apatite-nepheline ores, as well as in an algorithm for predicting technological parameters, which is part of the information support of the control system under consideration. The algorithm is based on the use of the apparatus of deep recurrent neural networks and Kalman filtering, which is used at the stage of data preprocessing to train the neural network. The paper describes the proposed algorithm for predicting multidimensional time series, adapted to the considered technological process, presents the software executed in the MatLab environment to demonstrate the efficiency of the specified combination of methods for processing technological parameters. In a model experiment, it has been shown that the use of filtering makes it possible to increase the accuracy of the forecast, which is especially noticeable at its large horizons. The practical significance of the research results is the proposed structure of an intelligent control system for the processing of apatite-nepheline ore waste and software for predicting its parameters, which can be used in various decision support systems.
Web-service development for owners of small river transport in Saint Petersburg
Authors:   St. Petersburg State University, Gadasina Lyudmila V. , Vedernikova Anna Yu. ,   ITMO University, Ivanova Maria V. ,   Center for Research in Perspective Technologies, LLC
Published: February 2022

The geographical location and tourist features of St. Petersburg require a specialized web service for owners and tenants of river transport, aggregating all the information necessary for them. Currently, such information is available in various news sources, web portals and groups in social networks. The work presents a prototype of a service for small river transport users. Information needs and functional and requirements for it were identified during in-depth interviews with stakeholders of the project. The web service database is implemented in the PostgreSQL DBMS with the PostGIS extension. The work presents the structure of the service, which includes 10 pages, describes its main sections, such as current regulatory documents, news, interactive maps, reference information, as well as technical information about ships and restrictions on their movement due to technical characteristics. During its development, an analysis of existing solutions related to each section was carried out. During the "Maps" section development, an analysis of existing web tools for displaying interactive maps and the selection of the best solutions was carried out. Using the Google Maps designer, interactive maps were created for the web service being developed. The first of them is a map of the city's water bodies, containing such layers as: floating gas stations, lighthouses, customs, checkpoint and Ministry of Emergencies, private yacht clubs and marinas, berths and quayes, bridges, etc. The interactive weather map allows the user to get acquainted with the weather conditions, as well as their 5-day forecast. One of the priority functional requirements of the web service, called stakeholders, was the determination of water barriers and bridges that were inappropriate in the size of the vessel. The "Your Ship" section of the developed prototype web service offers a solution to meet this requirement. The developed web service is one of the favorable incentives for the development of the water tourism sphere and the use of river transport in St. Petersburg.
A Quantum 0-infty Law
Authors:   Universit&, Bauer Michel ,   #233,   Paris-Saclay, France
Published: February 2022

We give conditions under which a sequence of randomly chosen orthogonal subspaces of a separable Hilbert space generates the whole space.
Online Database of Multiwavelength Water Masers in Galactic Star-forming Regions
Authors: Ladeyschikov Dmitry A. , Sobolev Andrey M. , Bayandina Olga S. , Shakhvorostova Nadezhda N.
Published: February 2022

In this paper, we present an online multiwavelength database of water masers in star-forming regions of the Galaxy. The collected data represent ∼95% of all observations of water masers in star-forming regions published since 1989. Nineteen transitions are included, from 22 GHz to 1.88 THz. The MaserDB.net information system provides fast and open access to the collected data, including maser tabular data, spectra, and interferometric maser spot data. The database covers ∼18,700 individual observations and ∼7200 maser detections. The data on the water maser detection are available for ∼2600 sources, and interferometric data are available for ∼560 sources. Statistical analysis of the water masers’ data and comparison with other abundant maser species found in star-forming regions (OH and CH3OH of class I and II) show that water masers are the most ubiquitous maser type. Access to the water maser database is available online at https://MaserDB.net. The database can be queried using a web search form or Structured Query Language.
Hubble Space Telescope Observations of GW170817: Complete Light Curves and the Properties of the Galaxy Merger of NGC 4993
Authors: Kilpatrick Charles D. , Fong Wen-fai , Blanchard Peter K. , Leja Joel , Nugent Anya E. , Palmese Antonella , Paterson Kerry , Starkenburg Tjitske , Alexander Kate D. , Berger Edo , Chornock Ryan , Hajela Aprajita , Margutti Raffaella
Published: February 2022

We present the complete set of Hubble Space Telescope imaging of the binary neutron star merger GW170817 and its optical counterpart AT 2017gfo. Including deep template imaging in F814W, F110W, F140W, and F160W at 3.4 yr post-merger, we reanalyze the full light curve of AT 2017gfo across 12 bands from 5 to 1273 rest-frame days after merger. We obtain four new detections of the short γ-ray burst 170817A afterglow from 109 to 170 rest-frame days post-merger. These detections are consistent with the previously observed β = −0.6 spectral index in the afterglow light curve with no evidence for spectral evolution. We also analyze our limits in the context of kilonova afterglow or IR dust echo emission but find that our limits are not constraining for these models. We use the new data to construct deep optical and IR stacks, reaching limits of M = −6.3 to −4.6 mag, to analyze the local environment around AT 2017gfo and low surface brightness features in its host galaxy NGC 4993. We rule out the presence of any globular cluster at the position of AT 2017gfo to 2.3 × 104
L
⊙, including those with the reddest V − H colors. Finally, we analyze the substructure of NGC 4993 in deep residual imaging and find shell features that extend up to 71.″8 (14.2 kpc) from NGC 4993. The shells have a cumulative stellar mass of 6.3 × 108
M
⊙, roughly 2% of NGC 4993, and mass-weighted ages of >3 Gyr. We conclude that it was unlikely that the GW170817 progenitor system formed in the galaxy merger.
Stars Crushed by Black Holes. II. A Physical Model of Adiabatic Compression and Shock Formation in Tidal Disruption Events
Authors: Coughlin Eric R. , Nixon C. J.
Published: February 2022

We develop a Newtonian model of a deep tidal disruption event (TDE), for which the pericenter distance of the star, r
p, is well within the tidal radius of the black hole, r
t, i.e., when β ≡ r
t/r
p ≫ 1. We find that shocks form for β ≳ 3, but they are weak (with Mach numbers ∼1) for all β, and that they reach the center of the star prior to the time of maximum adiabatic compression for β ≳ 10. The maximum density and temperature reached during the TDE follow much shallower relations with β than the previously predicted

ρ

max

∝

β

3

and

T

max

∝

β

2

scalings. Below β ≃ 10, this shallower dependence occurs because the pressure gradient is dynamically significant before the pressure is comparable to the ram pressure of the free-falling gas, while above β ≃ 10, we find that shocks prematurely halt the compression and yield the scalings

ρ

max

∝

β

1.62

and

T

max

∝

β

1.12

. We find excellent agreement between our results and high-resolution simulations. Our results demonstrate that, in the Newtonian limit, the compression experienced by the star is completely independent of the mass of the black hole. We discuss our results in the context of existing (affine) models, polytropic versus non-polytropic stars, and general relativistic effects, which become important when the pericenter of the star nears the direct capture radius, at β ∼ 12.5 (2.7) for a solar-like star disrupted by a 106
M
⊙ (107
M
⊙) supermassive black hole.
Dynamical Friction and Tidal Interactions
Authors: Roshan Mahmood , Mashhoon Bahram
Published: February 2022

We discuss dynamical friction in an N-body system in the presence of tidal interactions caused by a distant external source. Using the distant tide approximation, we develop a perturbation scheme for the calculation of dynamical friction that takes tidal effects into account in linear order. In this initial analytic approach to the problem, we neglect the influence of tides on the distribution function of stars in the background stellar system. Our result for the dynamical friction force in the appropriate limit is in agreement with Chandrasekhar’s formula in the absence of tides. We provide preliminary estimates for the tidal contributions to the dynamical friction force. The astrophysical implications of our results are briefly discussed.
The Critical Core Mass of Rotating Planets
Authors: Zhong Wei , Yu Cong
Published: February 2022

The gravitational harmonics measured from the Juno and Cassini spacecraft help us specify the internal structure and chemical elements of Jupiter and Saturn, respectively. However, we still do not know much about the impact of rotation on the planetary internal structure as well as on their formation. The centrifugal force induced by the rotation deforms the planetary shape and partially counteracts the gravitational force. Thus, rotation will affect the critical core mass of the exoplanet. Once the atmospheric mass becomes comparable to the critical core mass, the planet will enter the runaway accretion phase and become a gas giant. We have confirmed that the critical core masses of rotating planets depend on the stiffness of the polytrope, the outer boundary conditions, and the thickness of the isothermal layer. The critical core mass with the Bondi boundary condition is determined by the surface properties. The critical core mass of a rotating planet will increase with the core gravity (i.e., the innermost density). For the Hill boundary condition, the soft polytrope shares the same properties as planets with the Bondi boundary condition. Because the total mass for planets with the Hill boundary condition increases with the decrease of the polytropic index, a higher core gravity is required for rotating planets. As a result, the critical core mass in the stiff Hill model sharply increases. The rotational effects become more important when the radiative and convective regions coexist. Further, the critical core mass of planets with the Hill (Bondi) boundary increases noticeably as the radiative layer becomes thinner (thicker).
Synchronization of Small-scale Magnetic Features, Blinkers, and Coronal Bright Points
Authors: Shokri Zahra , Alipour Nasibe , Safari Hossein , Kayshap Pradeep , Podladchikova Olena , Nigro Giuseppina , Tripathi Durgesh
Published: February 2022

We investigate the relationship between different transients such as blinkers detected in images taken at 304 Å, extreme ultraviolet coronal bright points (ECBPs) at 193 Å, X-ray coronal bright points (XCBPs) at 94 Å on the Atmospheric Imaging Assembly, and magnetic features observed by the Helioseismic and Magnetic Imager during 10 yr of solar cycle 24. An automatic identification method is applied to detect transients, and the YAFTA algorithm is used to extract the magnetic features. Using 10 yr of data, we detect in total 7,483,827 blinkers, 2,082,162 ECBPs, and 1,188,839 XCBPs, respectively, with their birth rate of about 1.1 × 10−18 m−2 s−1, 3.8 × 10−19 m−2 s−1, and 1.5 × 10−19 m−2 s−1. We find that about 80% of blinkers are observed at the boundaries of supergranules, and 57% (34%) are associated with ECBPs (XCBPs). We further find that about 61%–80% of transients are associated with the isolated magnetic poles in the quiet Sun and that the normalized maximum intensities of the transients are correlated with the photospheric magnetic flux of poles via a power law. These results conspicuously show that these transients have a magnetic origin and their synchronized behavior provides further clues toward the understanding of the coupling among the different layers of the solar atmosphere. Our study further reveals that the appearance of these transients is strongly anticorrelated with the sunspots’ cycle. This finding can be relevant for a better understanding of solar dynamo and magnetic structures at different scales during the solar cycle.
Length–weight relations of 12 freshwater fish species (Actinopterygii: Cypriniformes) including two endangered species, Cobitis choii (Cobitidae) and Gobiobotia naktongensis (Cyprinidae), in the Geum River, South Korea
Authors: Baek Seung-Ho , Park Sang-Hyeon , Kim Jeong-Hui , Yoon Jo-Hee , Moon Jeong-Suk , Kim Dong-Hwan , Yoon Ju-Duk
Published: February 2022

Length–weight relations (LWRs) of 12 freshwater fish species from the Geum River, South Korea were estimated. The following species representing the family Cobitidae, Xenocyprididae, Acheilognathidae, and Gobionidae were studied: Cobitis choii Kim et Son, 1984; Opsariichthys uncirostris (Temminck et Schlegel, 1846); Zacco platypus (Temminck et Schlegel, 1846); Tanakia lanceolata (Temminck et Schlegel, 1846); Acheilognathus rhombeus (Temminck et Schlegel, 1846); Hemibarbus labeo (Pallas, 1776); Gobiobotia naktongensis Mori, 1935; Hemibarbus longirostris (Regan, 1908); Microphysogobio jeoni Kim et Yang, 1999; Pseudogobio esocinus (Temminck et Schlegel, 1846); Pseudorasbora parva (Temminck et Schlegel, 1846); Squalidus japonicus (Sauvage, 1883). Parameter b ranged from 2.820 (P. parva) to 3.485 (C. choii), and parameter a ranged from 0.0015 (C. choii) to 0.0145 (A. rhombeus). The LWR for C. choii and G. naktongensis, endangered species in South Korea, was estimated for the first time. Our results could be useful as baseline information for evaluating population status.
Partie I. Le prix de la reprise
Authors: Département analyse et prévision  , Heyer Éric , Timbeau Xavier
Published: February 2022

Près de deux ans après l’apparition du virus Sars-Cov2, la crise sanitaire n’est pas terminée. Les vagues se succèdent et le nombre de cas continue à augmenter à l’échelle mondiale. Mais la vaccination progresse, ce qui a permis de ralentir la contamination et surtout le nombre d’hospitalisations et de décès. Les mesures prophylactiques subsistent mais elles sont d’une bien moindre intensité que lors de la période de mars-avril 2020. Le profil de la croissance du premier semestre 2021 est resté fortement conditionné par les vagues de la pandémie mais les perspectives se sont améliorées. Sous l’hypothèse que de nouveaux variants ne compromettront pas l’efficacité du vaccin, l’impact de la crise se résorberait progressivement en 2021 et 2022. Après avoir baissé de 3,6 % en 2020, la croissance mondiale atteindrait 5,8 % en 2021. La forte reprise s’accompagne d’un regain d’inflation. Ces tensions seraient temporaires et n’amèneraient pas les banques centrales à durcir brutalement les conditions monétaires. En 2022, les mesures budgétaires de soutien disparaîtraient mais contrairement à l’après-crise des subprime , les pays, notamment ceux de la zone euro, ne s’engageraient pas dans une consolidation budgétaire prématurée. Dans les pays développés, la trajectoire de croissance en 2022 dépendra du comportement d’épargne des ménages qui ont accumulé du patrimoine financier pendant les périodes de confinement. Sous l’hypothèse que le taux d’épargne se stabilise à son niveau de fin 2019, l’activité des pays développés ralentirait légèrement en 2022 pour s’établir à 4,1 % en moyenne annuelle, ce qui n’interromprait pas le processus de rattrapage.