bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on subjective evaluation method of intelligent parking assist system based on typical parking scenario
Authors: Lei Bin , Zhang Shuai , Liang Rongliang , Geng Hao
Published: June 2021

With the rapid development of intelligent driving technology, Intelligent Parking Assist systems have been widely used. Through analyzing the technical characteristics of the Intelligent Parking Assist system, this article brings up subjective evaluation indicators of Intelligent Parking Assist system from the perspective of consumers' daily use; Practical verification is carried out for three typical parking scenarios including parallel parking spaces, vertical parking spaces and inclined train spaces, thus a set of subjective evaluation methods suitable for Intelligent Parking Assist systems for passenger cars is summarized.
Research on real-driving emissions of heavy tractor under different loads
Authors: Dou Yantao , Li Yong , Ling Jian
Published: June 2021

The actual road diesel emissions of heavy-duty vehicle is very high, which has been a concern around the world. In 2018, Chinese government promulgated the "China VI" regulations containing real-driving emission test requirements and limits, requiring vehicle manufacturers to effectively control vehicle emissions to meet the requirements of China VI. This article takes a heavy-duty tractor equipped with a "China VI" engine as the research object, and performs actual road emission tests after loading 10%, 25%, 50%, 75%, and 100% respectively. The results show that NOx emissions are higher at low loads and PN emissions are higher at high loads, and CO emissions are not sensitive to load changes.
Dynamic construction of virtual manufacturing cell considering workload balancing and machine failure
Authors: Lv Zhe , Fan Junjie , Wang Lipeng
Published: June 2021

Machine is the key element in manufacturing system. Machine failure will lead to order delivery delay and production cost rise. Aiming at the random disturbance of equipment failure, a dynamic non-linear programming model of virtual manufacturing cell (VMC) is established, which aims to minimize the equipment cost, logistics transportation cost, delay delivery cost and the differences of workload among cells, based on the comprehensive consideration of equipment reliability, process route constraints, variable processing path and workload. Due to the high complexity of the problem, the hybrid particle swarm optimization algorithm is used to solve the model, and the rationality and effectiveness of the method are verified by a numerical example. Experimental results show that this method has advantages in reducing the cost of cell reconfiguration, improving the utilization of equipment and shortening the completion time.
Open-source project recommendation model
Authors: Zhu Huihui , Peng Pu , Xu Huan
Published: June 2021

Open-source has become a very important topic in this era. the number of open-source projects on github Shows a huge growth trend. Facing so many open-source projects, it’s not easy to find the projects and topics that the developers interested in. so, it is necessary to model the user's behavior data,So as to automatically recommend projects to developers. to explore this problem, we constructed a dataset of 90w users and 461w projects based on github log and did a lot of cleaning work on the data. finally, we model the data through the improvement of the Light-GCN model to recommend relevant open-source projects to users. The experimental results show that the accuracy of our model is more than 15%.
Application of dynamic firework algorithm considering variable neighborhood strategy in flexible job shop scheduling problem
Authors: Lv Jie , Zhang Fenqiang
Published: June 2021

Aiming at the flexible job shop scheduling problem, this paper constructs a dual-objective mathematical model to minimize the maximum completion time and the minimum total processing cost. The traditional firework algorithm introduces a variable neighborhood search strategy, which is generated during the explosion of the algorithm. On the basis of explosive spark and Gaussian spark, the algorithm is further avoided from falling into the dilemma of local optimization. The product of completion time and processing cost is used as the fitness value of the plan, so that the firework algorithm is suitable for solving the two objective scheduling problems in this paper, and the ratio of fitness value and congestion is used as a comprehensive index for the selection of the optimal plan . In this paper, the selected 5×6 calculation examples are solved, and the completion time of the optimal scheduling scheme is reduced by 12.9%, and the total production cost is reduced by 17.67%, which verifies the feasibility and efficiency of the method.
Comparative analysis of three mode-selection methods for solid-state lasers
Authors: Sun Yan
Published: June 2021

In the Nd3+:YAG pulsed Q-switched laser system, the selective output of several low order modes of TEM00, TEM01 and TEM11 is realized by adding a iris diaphragm, a telescope or a Gaussian mirror at an appropriate position in the resonator, and the three are compared and analyzed.
The switching control strategy of redundant electromechanical servo system based on the compound sliding mode control
Authors: Li Zonglun , Yu Zhiyuan , Jiang Menglong
Published: June 2021

Aiming to resolve the limitations of robustness and stability in switching working modes of dual redundancy electric servo system, a control strategy based on sliding mode control is suggested. By analyzing the electromechanical servo system’s basic structure and working theory, a mathematical model is created to enable the design of new control functions. Taking into account the influence of the internal parameter perturbation of the electromechanical servo system during the switching between working modes, the sliding mode control is used to enhance system robustness, and the method of combining the latest saturation function and the exponential reaching law is used to minimize the system chattering. The simulation results and analysis show that the control strategy can effectively improve the robustness and control accuracy of the system.
Experiment and modeling into drilling of micro-hole on TC4 by electrochemical jet machining
Authors: Song Dongxiao , Xiong Liangcai , Long Yuhong , Shi Tielin
Published: June 2021

This paper studied the rule of micro-hole in electrochemical jet machining (EJM) of TC4 alloy and established the mathematical model of machining process and predicted the machining profile. Considering the influence of machining gap and machining time, orthogonal experiment was designed. This paper established the mathematical model of the electrochemical jet machining process of TC4 alloy based on the response surface analysis (RSA) method. The results indicate that the electrochemical jet can improve the directivity of machining, reducing the machining gap can improve the machining efficiency, but the jet will cause secondary corrosion and abrupt change of current at the edge of inlet. The mathematical model based on response surface analysis is accurate after variance test. The experimental results show that the average error between the established prediction model of machining depth and the actual value is 2.32%, and the average error of the prediction model of inlet radius is 2.18%.
Fibrous nano composite reinforced surface on WC-Co cemented carbide achieved by pulsed electron beam irradiation and subsequent tempering
Authors: Peng Wenhai , Hao Shengzhi , Zhao Limin
Published: June 2021

Exotic microstructures can be tailored by extreme conditions with combined material processing techniques for desirable properties. In this work, an innovative 2-staged process was explored for WC-10Co cemented carbide surface modification. Firstly, rapid thermal cycles were induced by high current pulsed electron beam (HCPEB) irradiation at energy density of 6 J/cm2, during which the micro-WC/Co was melted and re-solidified into a nano-scaled equiaxed grain microstructure with metastable fcc-WC1-x as the majority phase in the surface layer (~2 μm). Thereafter, a subsequent tempering process was applied to the HCPEB-irradiated cemented carbide specimens and the nano equiaxed grains in the surface layer were gradually transferred into nano-scaled fibrous microstructure. Phase transformation was investigated using thermo-gravimetric analysis differential scanning calorimetry (TGA-DSC), confocal laser scanning microscopy (CLSM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Analysis showed that the fibrous nano structure resulted from the decomposition of WC1-x at 600-700 ºC via fcc-WC1-x → hex-WC + hcp-W2C. After the 2-staged process, the surface microhardness was greatly improved.
Opportunities and Threats for Innovative Import Substitution in Russia
Authors: Krivenko Natalya
Published: June 2021

The article examines the development of import substitution in Russia from the historical perspective, confirming the need for an innovative strategy instead of the model of catch-up development. The study investigates international and domestic approaches to the implementation and impact of innovations, noting achievements and considerable potential of Russian science. Analysis of certain economic indicators for the period 2017-2019 revealed positive trends in the development of agricultural industry, negative dynamics of industrial production, a decline in manufacturing production and growth in mining. A decrease in research and development expenditures and a decline in the number of design, design and survey organizations, and researchers led to a decrease in production share of high-tech and knowledge-intensive industries in gross domestic product. There is a slight increase in exports, including its share in world exports. The problems and achievements of import substitution are considered on the example of the agricultural and aviation industries. The SWOT analysis identified the strengths, weaknesses, opportunities, and threats for the development of Russian import substitution, considering the innovative component. Finally, the paper proposes an author’s approach to a cross-sectoral assessment of import substitute products in order to create an effective import substitution mechanism, considering the innovative component.
The Banking Sector Role in the Rural Territories Social Development
Authors: Zhichkin Kirill , Nosov Vladimir , Zhichkina Lyudmila
Published: June 2021

The article examines the features of banking services for the rural population on the example of the Samara region. The banking sector accumulates significant financial resources of the population, which can be directed to the service area development. In modern conditions, the collected funds are transferred to large cities, making rural areas even more depressed. The study purpose is to determine the features of banking services for the population in rural areas. Within the framework of this, the following tasks are being solved: - the banking services state is analysed on the example of the Kinelsky district of the Samara region; - problems specific to rural areas are identified; - measures are proposed to solve the problems of banking services in rural areas. On the example of the Kinelsky district, it can be seen that large financial resources (more than 500 million rubles) are being withdrawn from the district with the contributions of the rural population. At the same time in rural settlements, banking services are in an inadequate state: Sberbank branches are closed or switched to part-time work. There is a low degree of provision with banking terminals, and the standards for servicing the population are not observed. As a result, the state should more actively regulate the current situation, using economic mechanisms to solve the existing social problem.
Issues of Price Formation for Products of the Forestry Sector
Authors: Kolesnikova Tatiana , Naumova Tatiana , Smolennikova Liudmila , Strelnikova Natalia , Babahanova Nilufar
Published: June 2021

The article considers a theoretical framework of an enterprise’s cost classification, states several types of product calculations, defines possible variants of determining a prime cost of harvesting 1m3 of timber in the environment of the Republic of Mari El, emphasizes some regional specific features of pricing for wood resources.
Import Substitution Priorities for Ensuring the Economic Security of Russian regions
Authors: Golova Irina
Published: June 2021

The paper proposes a methodological approach to improving the Russian import substitution policy, which considers innovative import substitution as an important aspect of new industrialization of the country. The study analyzes problems and contradictions present in the high-tech production sector. The sectoral approach to solving the import substitution problems in Russia has proved to be unpromising. Thus, Russian regions have to implement the import substitution model, aimed at the comprehensive transformation of the production ecosystem. The research revealed the directions of improving the mechanisms of import substitution to ensure the economic security in the long term. Favorable conditions for the development of innovative import substitution in Russian regions were analyzed and compared using the author’s methodology; a group of leading regions was determined. The article describes ways to reduce institutional barriers between science and production to implement innovative activities, considering the specificity of Russian regions.
Directions for Improving the Tax Policy of the Republic of Crimea
Authors: Kadzhametova Tamila , Kerimov Asan , Mustafaeva Sevilya
Published: June 2021

The article analyzes the structure of the revenue and expenditure side of the budget of the Republic of Crimea in the current year, and the tax receipts at the industry level. The main criteria for the effectiveness of the regional tax policy are highlighted. The directions of the tax policy of the region, and measures to attract financial resources for investment in the economy of the region are analyzed. The authors propose the directions of improving the tax policy of the Republic of Crimea in the near future through the implementation of measures aimed at developing the regional economy and improving budgetary policy.
Property insurance as a type of economic activity: providing a balance of interests of insurance business participants
Authors: Kuzmina Irina K. , Egupov Vasily A. , Vishnyakov Roman V. , Artemyeva Aryuvseit A.
Published: June 2021

Background of the study: The economic activity of business entities is almost always associated with a particular turnover of property, assets. By making such transactions, entrepreneurs can be exposed to dangers. Therefore, today, in times of not only large man-made disasters, pandemics, the main tasks of any subject of the economic market include not only making a profit, but also preserving property and capital in integrity.

Purpose of the study: To define property insurance as a type of economic activity, establish a balance of interests of insurance business participants, identify unresolved issues and propose ways to improve legislation in the sphere of insurance.

Methods: The methodological basis of the research is a set of general scientific and private scientific methods of research activity, including historical, formal logic, the method of system analysis, scientific research, comparative legal, statistical, functional and structural, methods of analysis and synthesis, as well as empirical and theoretical-analogy and deduction.

Results and novelty: As a result of the research, the authors formulated the provisions and conclusions that contribute to the effective regulation of insurance relations and ensure the balance of interests of insurance business participants. The article substantiates the need to qualify a reinsurance contract as a property insurance contract along with other types named in Article 929 of the Civil Code of the Russian Federation.
Study into the COVID-19 Effects upon the North-Eastern Region Economy
Authors: Ahmedova Sibel
Published: June 2021

The primary objective of the present paper is to explore the impact of COVID-19 on the economy of the North-Eastern Region (NER) of the Republic of Bulgaria in an effort to systematize the appropriate mitigation measures to minimize the effects of COVID-19 outbreak. Determining the probable impact of the COVID-19 crisis on the NER economy is extremely difficult due to the pandemic dynamics and the constant shifts or changes in the forecasts related to its effects on the global economy and the development of the individual countries and regions in particular. The pandemic’s impact on the NER economy is carefully considered in terms of regional GDP per capita analysis; the key indicators of the labour resources; the development of travel and tourism industry, information and communication technologies (ICT), manufacturing industry, trade industry, maritime industry, cultural and creative industries, the level of foreign direct investment (FDI).
Assessment of the socio-economic development of the region (on the example of the Chuvash Republic)
Authors: Gorbunova Polina , Denisov Gennady , Perfilova Elena , Zakharova Anna
Published: June 2021

The article proposes a methodology for an indicative assessment of the socio-economic development of the region in order to ensure the sustainability of development. The author’s methodology is based on the principles of indicative management; based on the use of a system of indicators of development indicators, intervals of threshold values; is a step-by-step process of assessing the social and economic development of the region; takes into account the contribution of each factor to ensuring sustainable development; allows you to identify “strong” and “problem” areas of social and economic development of the region. The analysis of the results obtained in dynamics makes it possible to assess the effectiveness of development indicators.
Risks and threats to economic security in the digital economy
Authors: Kirishchieva Irina , Skorev Mikhail , Mishchenko Oksana , Grafova Tatiana
Published: June 2021

The economic security of the company is the state of protection of the vital interests of the enterprise from the impact of internal and external destabilizing factors and threats, the emerging management and collective enterprise through the effective use of its resources, as well as the implementation of measures of economic, legal, organizational, technical, technological and social nature. -psychic directed and stable functioning of the enterprise both in the current and in the long term. Digitalization is bringing changes to the country’s economy. The volume of services, the use of labor, investment in physical and human capital, technologies and their diffusion, the use of trade services, including financial, legal, managerial, informational and consulting, and is reflected in production efficiency, labor productivity and competitiveness, culture, lifestyle and system of values. The presented risks and threats to the security of an enterprise in a digital economy emphasize the need to improve the electronic security system. At the same time, the features of the process of ensuring electronic safety in the context of digital development lie in the development and use of tools for identifying and assessing risks, indicators and indicators of the level of economic security, providing subsystems, including information, technological, personnel, investment, regulatory and legal components.
Implementing the Social Functions of Business in the Digital Economy
Authors: Kazarenkova Natalya , Obukhova Anna , Maslov Arkady
Published: June 2021

Digitalization is an integral part of the development of the economy and society in modern conditions. On the one hand, the introduction of innovative technologies creates new opportunities for business development, on the other hand, dictates new rules and requirements for its organization. At the same time, social and economic development cannot be imagined without taking into account the social dimension of economic growth. Increasing economic indicators of business development in Russia and reducing the growth of social tension is a complex task for the coming years, which determines the relevance of research in the field of implementing social functions of business. This problem became especially important during the coronavirus pandemic, when the need to protect individual social groups of citizens and provide various types of social services through remote access was manifested. The transformation of the service sector under the influence of the digitalization process poses the business community with the task of accessibility of socially significant products and services in 24/7 mode. It should be noted that business socialization is carried out at the intersection of entrepreneurship and charity and is embodied in various business models. The article addresses the problems of developing modern forms of implementing the social functions of business in the context of the digital transformation of the economy and society. One of the tools to solve the problem of implementing the social functions of the business in the environment is the mechanism for developing and implementing social business projects, taking into account their effectiveness and social significance.
Spatial Differentiation of Prices in the Russian Pharmaceutical Market in the Covid-19 Pandemic
Authors: Stupnikova Anna
Published: June 2021

The article presents the results of a study of a pandemic on the usual differentiation of price drugs in Russia. It is determined that the pandemic led to a significant increase in consumption and values in the first months of the regime. It was found that in the context of a pandemic in 90,6% of the studied regional markets, an increase in the level of differentiation of prices for medicines compared to 2019. It was revealed that the greatest volatility of prices for medicines was observed in the St. Petersburg market. The grouping of regional markets according to the level of spatial differentiation of prices for medicines in a pandemic showed that the group with the maximum volatility of prices for medicines was formed by four regions: Saint Petersburg, the Jewish Autonomous Region, the Republic of Khakassia and the Republic of Tatarstan.
The State of the Infrastructure Environment as a Determining Factor of Heterogeneity in the Development of the Regions of Russia
Authors: Tretyachenko Tatyana , Pivovarova Galina , Sogomonyan Svetlana
Published: June 2021

The article is devoted to the issues of heterogeneity in the development of the infrastructure environment of macro-regional economic systems (federal districts) and their regions. An assessment of the state and effectiveness of the infrastructure environment in macro-regions and regions of the Russian Federation is made, it is concluded that interregional heterogeneity in the provision of physical infrastructure and its state affects the functioning and development of both regional economic systems and the economic system of the state as a whole. It is emphasized that the priority of state policy in the development of the infrastructure environment of regions - leaders leads to the migration of labor to these regions, increases the burden on their budgets, further enhances asymmetric regional development, and contributes to the growth of social tension in regions with an insufficient and degrading infrastructure environment. The article presents data on per capita financing for the development of infrastructure of leading regions and outsider regions, the level of infrastructure development in the regional context. The authors propose to use such promising mechanisms as bonds and infrastructure crowdfunding to finance the development of infrastructure of leading regions.
Problems of Countering Twilight Processes in Modern Economic Conditions
Authors: Logvinova Irina , Zhigunova Anna , Selischev Maxim , Maga Anastasia
Published: June 2021

Twilight economic activity can be quite destructive for the state. If the obstruction of criminal economic activity is stopped, the state will begin to experience significant difficulties in ensuring the budget. After all, each, even small, committed illegal act carries even minor damage in a subjective sense, but if you analyze the statistical data of all such «small» crimes, the figures become quite impressive. The solution of such problems becomes the most relevant in modern conditions
Development of approaches to identification of systemic importance of insurance companies
Authors: Ignatova Tatiana , Alifanova Elena , Evlakhova Yulia , Alexanis Christos
Published: June 2021

The article is devoted to systemically important insurance organizations, problems of their identification, identification of vulnerabilities to financial security threats, risks of money laundering and terrorist financing. The authors proposed a new criterion for the systemic importance of insurance companies (links with systemically important banks), which, together with the existing indicators, can be used in identifying both global and national systemically important insurers. Using the example of the links of Russian insurers through the ownership structure with Russian systemically important credit institutions, the possibilities of applying this criterion were shown: the pairs of links in the Russian market and the types of links between organizations were identified, the selection of insurance companies was carried out. As a result of the study, the authors compiled a list of Russian insurers that can be considered systemically important in the Russian financial market. General vulnerabilities of systemically important insurance and credit organizations were determined based on the analysis of reports on the national assessment of money laundering and terrorist financing risk. The obtained results can be used by state bodies for regulating the financial market and financial monitoring when developing a policy for regulating the insurance sector.
Features of machine learning in the study of the main factors of development of countries of the world
Authors: Borisova Ludmila , Zhukova Galina , Kuznetsova Anna , Martin Julie
Published: June 2021

The paper analyzes the socio-economic and demographic indicators of life expectancy in the countries of the world. Methods of regression analysis and machine learning are used. Statistically significant indicators that affect life expectancy around the world have been identified. When analyzing the data using machine learning methods, 13 of the 14 analyzed indicators were statistically significant. Significant indicators, in addition to those selected in the regression analysis, were 3: the under-five infant mortality rate (per 1,000 live births), the Net Barter Terms of Trade Index (2000 = 100), and Imports of goods and services (in % of GDP) (in the regression analysis, only the infant death rate was significant). In addition, it should be noted that there is a significant decrease in the under-five infant mortality rate (per 1,000 live births) for the EU, CIS and South-East Asian countries compared to the border set in the study for all countries: 4.65 vs. 34.9, a decrease in the birth rate from 2.785 to 1.85, a sharp increase in exports of goods and services: from 23.17 to 80.59, a halving in imports of goods and services, a drop in population growth from 2.105 to 0.85. The performed statistical analysis strongly supports the use of machine learning methods in identifying statistically significant relationships between various indicators that characterize the development of countries, if there are gaps in the data.
How to Evaluate the Management of Migration Flows to a Region on the Basis of Parameters of the Region’s Migration Attractiveness
Authors: Grizovskaya Daria
Published: June 2021

Given the decline in the share of the able-bodied population, a large share of low-skilled labor, and the need to implement national projects aimed at changing the demographic background of the state, which are primarily expressed in stimulating the birth rate growth, the Russian Federation is faced with the task of attracting labor migrants capable of supporting the industrial transformation of the Russian economy. The aim of the study is to develop a comprehensive, goal-oriented approach to the analysis of possible tools for migration regulation Russian Federation based on the assessment of the existing world practice. The instrumental and methodical apparatus of the study is based on an integrated approach, within which migration is considered as a goal-oriented process that has characteristic components and is influenced by objective and personalized factors that depend on the conditions of the socio-economic situation in the development of the territory, and also combines various methods of scientific knowledge: system analysis, comparative, economic and statistical, grouping, benchmarking, etc. In the course of this study were developed us suggestions to improve the regulation of migration processes in the Russian regions, based on the orientation of the action on the selected specialization and targeted development priorities of the territories.
Information Technologies in the Space of Educational Practices
Authors: Stryhul Maryna , Khomeriki Olena , Khomeriki Marianna , Polovaia Nataliia , Hryshchenko Nelia
Published: June 2021

The article solves a scientific problem, the essence of which is the contradiction between the need to clarify the peculiarities of implementation of information and communication technologies in institutions of higher education of the technical profile and a certain deficit of special studies that would allow to meet this need. The situation is formulated in accordance with which in the sphere of social and cultural relations the preconditions for the use of Internet technologies are formed, but the managerial and directly educational levels of activity for the university are more promising «conservative» position, aimed at the phased and integration of these technologies in parallel processes of modernization higher education associated with the preservation of the quality of education, financial success of universities, etc. The modification of the network structure of education takes on special significance in connection with the emergence of new forms of social communication, including the innovative network learning, which becomes a social and communicative alternative to traditional education. Today, interpersonal communication, which is the sphere of the connection of new types and forms of communication without human being in the real environment, is determined precisely by the information culture of a person, which explains the human desire to learn in the new world on the basis of the use of information and computer technologies.
Scientific and Methodological Support for Modern Educational Technology Introduction into the Educational Process
Authors: Nugumanova Lyudmila N. , Shaykhutdinova Galiya A. , Yakovenko Tatyana V.
Published: June 2021

In the article the authors consider opportunities for scientific and methodological support of contemporary education digitization. The purpose of the article is to identify scientific and methodological support resources for developing specific recommendations to teachers on tackling education-related problems in the digital educational environment. When designing scientific and methodological support tools meant to facilitate introduction of modern educational technologies into the advanced teacher training process, the authors were basing on the principles of globalization and regionalization, technology continuity and discreteness, flexibility and availability. Consideration of the above mentioned principles permits to: introduce technologies applied in the global educational space, taking into account regional potential and student needs; select and combine individual factors of pedagogical technologies being based on assessment of their didactic efficiency under the conditions of a concrete educational process; adapt the technologies to teaching conditions, student cohort, budget, time and other circumstances in a timely and mobile manner. The article is meant for the academic teaching staff of institutes of supplementary teacher education, postgraduate and external PhD students, teachers and all those who take interest in problems of contemporary education.
E-learning and m-learning as tools for enhancing teaching and learning in higher education: a case study of Russia
Authors: Marunevich Oksana , Kolmakova Valentina , Odaruyk Irina , Shalkov Denis
Published: June 2021

In the world of online education, teachers are constantly looking for ways to interact with students both synchronously and asynchronously. The next decade is likely to witness a considerable rise in the development of more advanced e-learning and m-learning tools since they have become a vital factor for education due to the global shutdown of learning activities forced by the COVID-19 pandemic. This paper is a preliminary attempt to analyze the use of e-learning and m-learning technologies by Russian universities. E-learning and m-learning mean sharing knowledge and skills by using web- or mobile-based technology, respectively. The most commonly employed learning tools are social networks, LMS, and video conferencing which due to their accessibility, immediacy, interactivity, and context-awareness benefit both teachers and students in a number of ways.
M. Sharapova and the meldonium scandal: anti-crisis communications in personal branding
Authors: Zaharova Alexandra , Karmalova Elena
Published: June 2021

The article simulates and analyzes a practical case of building anti-crisis communications by tennis player Maria Sharapova in the meldonium scandal. The factors of the development of the crisis are analyzed, strategic and tactical mistakes and blunders are revealed, strategic and tactical successes and achievements are indicated.
«Smart» Logistics: Problems and Prospects in the Modern World
Authors: Przhedetskaya N. V. , Borzenko K.V. , Sheveleva V. V. , Kulkova E.P.
Published: June 2021

The COVID-19 pandemic caused serious damage not only to the economies of a number of countries, but also became a serious test for the entire world economy, causing a crisis that, even according to preliminary estimates, will lead to a deeper and more protracted recession than the global financial and economic crisis of 2008. In the second half of 2020, when COVID-19 vaccines are already in effect, the threat to public health fades into the background, giving way to the economic crisis, and, most importantly, the search for ways out of a difficult socio-economic situation. That is why the study of the impact of the COVID-19 crisis on logistics and the search for crisis management tools in logistics is so relevant. In this article, the authors hypothesize that digitalization as a promising tool for economic crisis management should play an important role in this process. This article identifies the current problems of logistics that arise in the context of the COVID-19 pandemic and the crisis, substantiates the prospects for systematic and highly effective crisis management in logistics based on digitalization, and offers applied recommendations for this.
Homozygous Novel Variants in the Glycine Decarboxylase Gene Associated with Nonketotic Hyperglycinemia in a Distinct Population
Authors: Elabd Heba Salah Abdelkhalek , Bastaki Fatma , Khalifa Mohamed
Published: June 2021

Glycine encephalopathy (GE), also known as nonketotic hyperglycinemia (NKH) is an autosomal recessive disorder due to a primary defect in the glycine cleavage enzyme system. It is characterized by elevated levels of glycine in the plasma and cerebrospinal fluid (CSF) and increased CSF to plasma glycine ratio.

Mutations in three genes of the mitochondrial glycine cleavage system have been found to cause NKH. Most patients have a mutation in the GLDC.

In this report, we present five new patients from Middle Eastern families with NKH. They were all born to consanguineous parents and two of them have family history of similarly affected sibling(s). All patients presented with neonatal encephalopathy associated with seizures. Their diagnoses were suspected clinically and confirmed biochemically.

DNA sequence analysis of the five patients revealed five different pathogenic or likely pathogenic variants in the GLDC. Three were missense variants (c.2675C > T; p.Ala892Val), (c.2512A > G; p.Asn838Asp), and (c.2943A > C; p.Lys981Asn); one was an intronic missense variant (c.1402–2A > T) leading to an exonic deletion, and one was a deletion of 42 amino acids (c.1927-?_2052 + ?del.) All variants were novel and homozygous. The pathogenicity of these variants was determined according to the American College of Medical Genetics (ACMG) variant classification and in silico analysis. Another novel homozygous variant (c.1384C > G; p.Leu462Val) was detected, which was classified as likely benign.

The novel variants identified in the GLDC in these patients underlie the pathogenesis of NKH, specifically for the Middle Eastern population. This expands the mutation spectrum of NKH to include a distinct ethnic population that has not been studied before.
Colloidal mixtures help explain liquid-liquid phase transitions
Authors: Bandari Anashe
Published: June 2021

The colloids exhibit Brownian motion similar to the thermal motion of atoms and may be used as a proxy for observing uncommon phase behavior in liquids.
Reproductive success, herbivory and
Authors: Oliveira Aline Mystica S. , Peixoto Paulo Henrique P. , Barbosa Bruno C. , Faria Ana Paula G.
Published: June 2021

Herbivory in plant reproductive tissues can severely reduce the fitness of the species, especially for those threatened with extinction. We investigated aspects of the reproductive ecology of Neoregelia ibitipocensis (Leme) Leme, an endangered species restricted to a few cloud forests sites in the Brazilian Atlantic Forest. Data on breeding systems, fertility, and viability of its populations are provided, as well as alternatives for development of strategies for ex situ conservation. Hand pollination experiments revealed that N. ibitipocensis is partially self-incompatible. Fruit and seeds were affected by intense herbivory caused by Tipulidae (Diptera) larvae. The predation reached 100% of the analysed infructescences during the first year of the study. We observed the production of parthenocarpic fruit both through controlled pollination experiments and under natural conditions. The potential for self-pollination and autogamy probably compensate for the reduced ability of the species to attract pollinators due to its small floral display. In the same way, parthenocarpy seems to represent a strategy to enhance the fitness of N. ibitipocensis, mitigating the effects of the predation. We developed an efficient protocol of in vitro multiplication, which represents a viable alternative for ex situ conservation of the species.
Effective model for rare-earth Kitaev materials and its classical Monte Carlo simulation*
Authors: Sun Mengjie , Lin Huihang , Zhang Zheng , Cai Yanzhen , Ren Wei , Kang Jing , Ji Jianting , Jin Feng , Wang Xiaoqun , Yu Rong , Zhang Qingming , Liu Zhengxin
Published: June 2021

Recently, the family of rare-earth chalcohalides were proposed as candidate compounds to realize the Kitaev spin liquid (KSL) [Chin. Phys. Lett.
38 047502 (2021)]. In the present work, we firstly propose an effective spin Hamiltonian consistent with the symmetry group of the crystal structure. Then we apply classical Monte Carlo simulations to preliminarily study the model and establish a phase diagram. When approaching to the low temperature limit, several magnetic long range orders are observed, including the stripe, the zigzag, the antiferromagnetic (AFM), the ferromagnetic (FM), the incommensurate spiral (IS), the multi-
Q
, and the 120° ones. We further calculate the thermodynamic properties of the system, such as the temperature dependence of the magnetic susceptibility and the heat capacity. The ordering transition temperatures reflected in the two quantities agree with each other. For most interaction regions, the system is magnetically more susceptible in the ab-plane than in the c-direction. The stripe phase is special, where the susceptibility is fairly isotropic in the whole temperature region. These features provide useful information to understand the magnetic properties of related materials.
Mapping forward-looking mitigation studies at country level
Authors: Lepault Claire , Lecocq Franck
Published: June 2021

We provide the first survey of the rapidly expanding literature on country-level mitigation pathways using systematic mapping techniques. We build a database of 4691 relevant papers from the Web of Science and Scopus. We analyze their abstracts and metadata using text mining and natural language processing techniques. To discover common topics within the abstracts, we use an innovative and fully reproducible topic modeling approach based on two machine learning models. We find that the number of papers per country is well correlated with current levels of greenhouse gas (GHG) emissions, with few papers for (current) low emitters, notably in Africa. Time horizons of 2030 and 2050 each account for one-third of the papers, with the former actually more frequent in recent years, spurred by interest in the (Intended) Nationally Determined Contributions. Topic modeling analysis of the data set reveals that forward-looking mitigation papers encompass all dimensions of mitigation, save for financial issues, that are lacking. However, energy and to a lesser degree land use, land use change and forestry are very dominant relative to other sectors. Topics are unevenly addressed across countries, reflecting national circumstances and priorities, but also pointing to gaps in the literature. The limited number of forward-looking papers in (currently) low-emitting countries raises questions about the lack of research capacity in support of the construction of domestic climate policies.
Decreases in relative humidity across Australia
Authors: Denson Eleanor , Wasko Conrad , Peel Murray C
Published: June 2021

How relative humidity is changing is important for our understanding of future changes in precipitation and evaporation. For example, decreases in relative humidity have the potential to increase evaporation and evapotranspiration increasing water scarcity. Since projected precipitation changes are highly uncertain, there is significant research relating precipitation changes to more certain local temperature increases, but such research often assumes relative humidity will remain constant. Here, we investigate how absolute and relative humidity across Australia have changed over 1955–2020. Absolute humidity, measured by dew point temperature, has remained relatively constant, while relative humidity has decreased on average over land by approximately −1%/decade. This suggests that assuming constant relative humidity when predicting future extreme precipitation using temperature or absolute humidity associations may result in over-estimation of future extreme precipitation intensities. As absolute humidity, measured by dew point temperature, was found to be relatively constant, we conclude the decrease in relative humidity is not due to a lack of water available for evaporation but may instead be the result of evaporation not increasing in line with temperature increases.
Projection of extreme precipitation induced by Arctic amplification over the Northern Hemisphere
Authors: Liu Jun , Wu Dongyou , Xu Xuanye , Ji Mingxia , Chen Quanliang , Wang Xin
Published: June 2021

Numerous attempts have been made to understand the connection between extreme weather and Arctic amplification (AA), and it is still disputed whether the mechanism is the elongation and deceleration of planetary-scale waves. In this study, we provide further evidence that the Arctic’s rapid warming is influencing extreme precipitation in the Northern Hermisphere based on observation and model outputs, and elucidate the underlying dynamic mechanisms. We find that AA has a significant positive correlation with extreme precipitation, both in the past (1901–2018) and in the future (by 2100). Moreover, observations reveal that, with the enhancement of AA since the mid-1980s, the planetary-scale wave amplitude has increased significantly at 0.66°/decade. This is associated with a negative Northern Hemisphere annular mode and an increased duration of weather patterns, resulting in more extreme precipitation events. Under Shared Socioeconomic Pathways SSP585 scenario, extreme precipitation increases by 8.7% along with wave amplitude increase of 7.9° by 2100.
Body size of male Bali cow in different maintenance systems in Bima District, West Nusa Tenggara
Authors: Prasetia M A , Budisatria I G S , Widi T S M , Bintara S , Baliarti E
Published: June 2021

Bali cattle originate from the Indonesian island of Bali and are well known in various regions throughout Indonesia. Bali cattle are known as beef cattle with high carcass proportion and good performance. There are two systems of Balinese cattle raising in Bima Regency, namely extensive and intensive. This study aims to measure the body size of male Bali cattle reared in an intensive and extensive rearing system in Bima Regency, West Nusa Tenggara. A total of 100 male Bali cows are kept using different maintenance systems, in the intensive system there are 50 heads and in the extensive system there are 50 heads, measured by body length, shoulder height, and chest circumference. Quantitative descriptive body size data were used to obtain mean values and standard deviations. The results showed that the body size of male Bali cows in intensive care in Bima Bali Cows was better in extensive maintenance (P <0.05). Thus, the intensive maintenance system for male Bali cattle can be applied to obtain better growth performance and can be used for fattening or selection of cattle of good quality to meet future national demand for beef.
Local forage development strategies based on beef cattle farmer’s preferences
Authors: Pratama I W , Agustine R , Astuti A , Kasmiyati  , Noviandi C T , Agus A , Putra A R S
Published: June 2021

Indonesia has large potential resource of local forage. However, the utilization is limited. Therefore, a local feed resources particularly on forage development strategy is needed to determine the chosen feed sources based on the needs and preferences of beef cattle farmer. The research objectives were to determine beef cattle farmers’ preferences in choosing forages for their livestock and to determine strategies for developing potential local forages based on beef cattle farmers’ preferences. This research involved 106 beef cattle farmers in Kucur and Arjowilangun Villages, Malang Regency, East Java, who were selected purposively. Descriptive statistical analysis using cross tabulation was used in this study. The results revealed that the three main preferences of farmers in choosing forages were based on the level of cattle palatability, nutrient content, and forage productivity, respectively. The strategy of local feed development can be promoted by developing local feed sources that have a high level of palatability, nutrient content, and productivity.