bluuebunny/crossref_metadata_2025 huggingface dataset:
A kind of Lagrangian chaotic property of the Arnold–Beltrami–Childress flow
Authors: Qin Shijie , Liao Shijun
Published: March 2023

Three-dimensional steady-state Arnold–Beltrami–Childress (ABC) flow has a chaotic Lagrangian structure, and also satisfies the Navier–Stokes (NS) equations with an external force per unit mass. It is well known that, although trajectories of a chaotic system have sensitive dependence on initial conditions, i.e. the famous ‘butterfly effect’, their statistical properties are often insensitive to small disturbances. This kind of chaos (such as governed by the Lorenz equations) is called normal-chaos. However, a new concept, i.e. ultra-chaos, has been reported recently, whose statistics are unstable to tiny disturbances. Thus, ultra-chaos represents higher disorder than normal chaos. In this paper, we illustrate that ultra-chaos widely exists in Lagrangian trajectories of fluid particles in steady-state ABC flow. Moreover, solving the NS equation when

$Re=50$

with the ABC flow plus a very small disturbance as the initial condition, it is found that trajectories of nearly all fluid particles become ultra-chaotic when the transition from laminar to turbulence occurs. These numerical experiments and facts highly suggest that ultra-chaos should have a relationship with turbulence. This paper identifies differences between ultra-chaos and sensitivity of statistics to parameters. Possible relationships between ultra-chaos and the Poincaré section, ultra-chaos and ergodicity/non-ergodicity, etc., are discussed. The concept of ultra-chaos opens a new perspective of chaos, the Poincaré section, ergodicity/non-ergodicity, turbulence and their inter-relationships.
Association of Dietary Approaches to Stop Hypertension (DASH) diet with self-reported sleep-disordered breathing (SDB): a cross-sectional study from China
Authors: Li Shengnan , Wang Cuicui , Tan Siyue , Zhang Yuyi , Zhang Ke , Wang Bo , Zuo Hui
Published: March 2023

Adherence to the Dietary Approaches to Stop Hypertension (DASH) diet has been associated with sleep quality. However, its relationship with sleep-disordered breathing (SDB) remains unknown. This study aimed to explore the association between the DASH diet and SDB using data from a community-based survey among adults in Suzhou, Eastern China. We conducted a cross-sectional analysis of the Suzhou Food Consumption and Health Survey in 2018–2020. Dietary intake was measured by a validated FFQ. The association between the DASH diet and SDB was estimated by multivariable logistic regression analysis. In addition, subgroup analysis and sensitivity analysis were performed to reinforce our findings. A total of 3939 participants were included in the final analysis. Participants in the upper quintile of the DASH score consumed more fruits, vegetables, nuts and legumes, whole grains, and dairy products, and less Na, red/processed meats, and sweetened beverages. The OR for the highest compared with the lowest quintile of the DASH score was 0·68 (95 % CI 0·52, 0·88; Pfor trend = 0·004) for SDB after multivariable adjustment. Of the eight DASH components, vegetables, nuts and legumes, and dairy products were inversely associated with SDB. The associations were similar in subgroups by age, sex, BMI, smoking, alcohol drinking, hypertension, diabetes and hyperlipidaemia. Adherence to the DASH diet was independently associated with decreased odds of self-reported SDB. Our novel results expand previous findings on diet and sleep and suggest the possibility of improving SDB by enhancing diet quality.
Food banks: Understanding their role in the food insecure population in the UK
Authors: Loopstra Rachel , Lambie-Mumford Hannah
Published: March 2023

The present paper reviews the growing body of literature on food insecurity and food bank use in the UK. It provides an overview of food insecurity in this context, followed by a description of the emergence of food banks, highlighting how any role that food banks play in the food insecure population is limited. Data on food insecurity and food bank use suggest many people experiencing food insecurity do not receive help from food banks. To better understand the factors influencing the relationship between food insecurity and food bank use, a conceptual framework is outlined, suggesting the relationship is far from straightforward and contingent on many factors. The nature and availability of food banks and other local support services and individual-level factors influence the likelihood of food banks being used in the context of food insecurity. Then, the extent to which food banks can impact food insecurity is also dependent on the quantity and quality of food distributed, as well as other support services offered from food banks. Closing reflections highlight rising living costs and food banks reporting that they do not have capacity to cope with increasing demand, underscoring the need for policy interventions. Reliance on food banks to respond to food insecurity may ultimately impede formulation of effective policy interventions to reduce food insecurity, giving the illusion of widespread available support, whilst food insecurity persists among those receiving help from food banks and those who experience food insecurity but do not use food banks.
Addressing the gaps in homeostatic mechanisms of copper and copper dithiocarbamate complexes in cancer therapy: a shift from classical platinum-drug mechanisms
Authors: Njenga Lydia W. , Mbugua Simon N. , Odhiambo Ruth A. , Onani Martin O.
Published: March 2023

This review will focus on copper homeostasis in mammalian cells and on our current understanding of copper dysregulation in cancer and recent therapeutic breakthroughs using copper coordination complexes as anticancer drugs.
Iridium(iii) polypyridine artificial metalloenzymes with tunable photophysical properties: a new platform for visible light photocatalysis in aqueous solution
Authors: Liu Bingqing , Zubi Yasmine S. , Lewis Jared C.
Published: March 2023

This study shows that Ir(iii)-based artificial metalloenzymes constitute a promising starting point for ongoing studies to control the stereoselectivity of visible-light-induced EnT reactions by engineering substrate binding/activation motifs in proteins.
Hydrogen bond directed high-fidelity optical detection of picric acid: A single driver on diverse roads towards the same destiny
Authors: Paul Suvendu , Paul Provakar , Samanta Saikat , Majumdar Tapas , Mallick Arabinda
Published: March 2023

This review article appraised the advancement of the small-molecule-based high-fidelity optical detection of picric acid triggered by hydrogen bonding in aqueous or semi-aqueous media as well as in solid and vapor phases.
Determination of the depth of folds in fiberglass products using ultrasonic waves
Authors: Chulkov D. , Terekhin A. , Atroshchenko V. , Dumansky A.
Published: March 2023

The article discusses the existing methods of ultrasonic testing of polymer composite materials, reflected in the literature, allowing to determine the size of discontinuities, a method is proposed for determining the depth of folds of fiberglass products of complex shape by subsurface ultrasonic waves using original ultrasonic piezoelectric transducers with conical waveguides designed and manufactured. An experimental development of a method for determining the depth of folds of fiberglass products and a comparison of the results of ultrasonic testing with the results of X-ray computed tomography was carried out.
Modeling the stress-strain state of variable-thickness composite shells and plates
Authors: Dimitrienko Yu. , Zakharova Yu.
Published: March 2023

A model for calculating the stress-strain state of variablethickness composite shells has been developed, based on assumptions such us the classical theory of Timoshenko-Mindlin shells. In the proposed model, the plate thickness is given by a function of curvilinear coordinates and is directly considered in the derivation of the equilibrium equations of the plate. The general equations of the theory of variable-thickness composite plates are derived. The article analyses the solution of the problem of plates bending under uniform pressure considering the variable thickness. For the numerical solution, the finite difference method (FDM) has been applied to the system of differential equations with matrix coefficients. For the resultant algebraic system, the FDM uses the tridiagonal matrix algorithm in computing the solution. The calculation results are compared with a plate of constant thickness. It is shown that the effect of thickness variability is quite significant.
Operation of polymer composite materials modified in a MW electromagnetic field under low temperatures conditions
Authors: Zlobina I. , Bekrenev N. , Egorov A.
Published: March 2023

Tests of control and microwave-modified samples of carbon- and glass-reinforced plastic were carried out according to the scheme of threepoint bending. The sample's temperature was -200C. It has been established that microwave exposure on to these materials for two minutes in the cured state at an energy flux density of (17-18) x104 and (22-25) x104 μW/cm2, respectively, contributes to an increase in bending strength by 12% and 15% with an increase in the uniformity of the parameter in a batch of samples from 1.5 to 4.9 times. It has been established that the accumulation of destructive damage in the prototypes occurs over a 2.5-3.5 times longer period of time than the control ones. The difference in the mechanisms of destruction of control and experimental samples is noted. If the destruction of the control samples has a brittle nature, then for the prototypes there is a tendency to the appearance of a plastic component.
Optimal cybersecurity management of an IP video surveillance system using neural network technologies
Authors: Tsarkova Evgenia
Published: March 2023

The aim of the study is to solve the actual problem of constructing an optimal strategy for managing a system for protecting against the spread of computer epidemics of IP video surveillance networks used in the work of distributed situational centers. The paper presents a new mathematical modeling apparatus for building an adaptive network protection system from cyber-attacks using a hybrid approach that uses both classical control and neurocontrol based on an artificial neural network.
Mathematical modeling of temperature stresses of heat-generating elements of elliptical cross-section
Authors: Kanareykin Aleksandr
Published: March 2023

The work is devoted to improving the reliability of nuclear power plants. During operation, the fuel elements of nuclear reactors operate at sufficiently high temperatures. The heterogeneity of the temperature field leads to the appearance of so-called thermal stresses. The main objective of this work is mathematical modeling of temperature stresses of fuel elements of cylindrical and elliptical cross-sections reactors. Based on mathematical modeling, it was shown that the level of thermal stresses arising during the transition from a circular cross-section to an elliptical one decreases.
Modeling the deformation of an elastic element of a small spacecraft in its plane during temperature shock
Authors: Bormotov A. , Orlov D. , Bratkova M.
Published: March 2023

A basic mathematical model of the deformation of a large elastic element of a small spacecraft in its plane is constructed. Deformations are caused by a temperature shock after a small spacecraft leaves the Earth’s shadow on the solar portion of the orbit. The model is used to conduct a computational experiment with the aim of assessing perturbations acting on a small spacecraft due to temperature shock. The temperature distribution during thermal shock is described by a one-dimensional model of thermal conductivity. The classical theory of thin plates is used to determine the deformations. The results of the estimation of disturbing factors are obtained as a result of a computational experiment for a model small spacecraft. These results indicate the need to compensate for the impact of temperature shock for small technological spacecraft. The data obtained can be used in the design of small space-craft for technological purposes.
Methodology for aviation MRO system management decision-making
Authors: Korchagin Aleksandr , Deniskin Yury , Pocebneva Irina , Aleksandrovskiy Maxim
Published: March 2023

The article considers the main methods for increasing the efficiency of aviation maintenance and repair (MRO) processes organization. A brief overview of these methodologies is presented and their key principles are highlighted. Based on the analysis of existing methodologies, a management decision-making technique based on the Stage-Gate project management technology and simulation modeling methods was proposed. This technique makes it possible to ensure the information availability for the after-sales services organization from other processes in a single information environment and make decisions on the transition to the next gate based on simulation models of aircraft maintenance at various gates.
Investigation of deformation characteristics impact of water-saturated rocks on the ecology of the coal-mining region
Authors: Dmitrienko V.A. , Dmitrienko N.A. , Kokunko I.N. , Pashkova O.V.
Published: March 2023

The purpose of the research is to evaluate the deformation properties of water-saturated clay shale to determine the displacements of the earth's surface. The analysis of the impact of mining on the environmental situation of town Shakhty in Rostov region was done. It is noted that the closure of coal mines and pumping termination of underground water led to flooding of the developed spaces of mining enterprises. This led to a change in the mechanical characteristics of clay rocks, their softening and compaction under the influence of rock pressure. Taking into account the significant capacity of clay shale in the structure of the rock mass and the technology of mining coal seams, there are currently surface deformations and the formation of cracks in the structures of buildings. According to the results of experimental studies, the deformation characteristics of clay shale under prolonged moistening have been established, affecting the precipitation of the foundations of buildings and, accordingly, lead to the formation of defects in buildings and structures. The obtained characteristics of fragmented clay shale can be used for modeling the stress-strain state of a rock mass and the development of deformations on the earth's surface by the finite element method.
Analysis of the level of implementation and use of innovations in the agricultural sector of Uzbekistan
Authors: Rustamova Iroda
Published: March 2023

Consistent measures are being implemented in the Republic of Uzbekistan to ensure wider integration of science, education and production, to create and apply new knowledge, to introduce innovative technologies and best practices. However, the results of the research on the introduction of innovative technologies and the development of the agrarian sector do not reach the lowest levels of the sec-tor, and the problems that have not been solved for years prevent the agricultural sector from developing more rapidly. In order to assess the level of use of innovations and information-advisory services in agriculture, the article carried out a social survey of different categories of participants of the innovation process using the expert evaluation method. Based on the results of the research, the trainings and seminars held in order to increase the knowledge and skills of the farmers on the use of innovative technologies, their ability to apply them in practice, the demand for innovations and the directions of the innovations being introduced, and the forms of providing information about the innovations in agriculture for farmers and peasants are presented. Also, the author expressed his views on the results of the introduction and use of innovations in the agricultural sector.
Nutrient types for explants in in-vitro propagation of mulberries and microcloning indicators of mother material
Authors: Mirzayeva Yorkinoy
Published: March 2023

Uzbek hybrid (♀Oshima I2N2 (Morus bombycis Koidz.)× ♂SANIIsh-25 (Morus multicaulis Perr.)) obtained by crossing the mulberry tree, obtained by selection in vitro from Jarariq-9 variety Murasige Skug (MS), Woody Plant Medium (WPM) and Driver and Kuniyuki (DKW) medium were used to obtain and develop explants. The average germination time of the explant in the WPM (standard) main nutrient medium in Uzbekistan hybrid, day-7.3 MS-6.6 days, DKW-7.6 days, but opening from the explant in WPM-56.8, MS-51.06%; DKW was observed to be 73.13%. It was observed that total shoot germination was MS-74.73 %; WPM-71.46%; DKW-78.86 %. It is determined that the indicators of Jarariq-9 variety compared to the indicators of the Uzbekistan hybrid, the average germination time of the explant in the WPM (standard) main nutrient medium is 7.6 days, MS-8.33 days, DKW-8 days, bud opening from the explant is 76.2% in WPM, MS-53.5%; and, DKW-74.4%
Impact Assessment of climate change on water resources of the Amu Darya River basin
Authors: Khodjiev Alisher
Published: March 2023

Water consumption and water use have been continuously increasing, and the impact of economic activities on the hydrological regime of water flow, especially in irrigation, population and industry, has increased significantly. In particular, it is significantly increasing in the countries of Central Asia, including the Republic of Uzbekistan. Today's global problem is the severity, scale and unusualness of anthropogenic climate change, especially in developing countries, creates the need for action with an urgent scientific approach. Undoubtedly, the assessment of the observed climate change and the current state of water resources will require many years of in-depth scientific research. One of the factors limiting the development of the countries of the Amu Darya basin is the lack of water resources. The world is experiencing intensive climate warming, which leads to the melting of glaciers, which are the main sources of fresh water for the river basins that make up the water resources of the countries of Central Asia. The article gives an assessment of regional and local climate change and gives recommendations for reducing water shortages in the countries of the province
Recultivation of soils contaminated with radionuclides by phytomelioration
Authors: Rahimova Natal'ya , Baitelova Alina , Solopova Valentina , Bykova Lyudmila , Savchenko Ekaterina
Published: March 2023

The use of aqueous solutions of ammonium nitrate and microorganisms in the proposed method will intensify the transition of radionuclides into soluble forms for assimilation by the root system of plants, obtaining maximum biomass of plants accumulating radionuclides, and significantly reducing the growing season. The process of obtaining biomass using the above technology makes it possible to repeat this method of purification many times, including within one seasonal period, until the content of radionuclides in the soil reaches acceptable values, after which the soil becomes suitable for agricultural use. The purpose of the study. Consider the transition of radionuclides into soluble forms for assimilation by the root system of plants. Material and Methods. To substantiate the possible directions of soil reclamation, we propose a conceptual model of radionuclide transport in the agrocenosis, on the basis of which a functional scheme for recultivation of soils contaminated with radionuclides has been developed. The collected biomass and the root system of plants must be disposed of. Due to the fact that large volumes of mass are subject to disposal, it is subjected to heat treatment - drying.
Air movement processes in living rooms with windowsill supply air valves
Authors: Simbirev Oleg , Zhilina Tatiana , Plotnikov Artem , Ilyukhin Konstantin
Published: March 2023

The main issue highlighted in the given paper is deviation of microclimate parameters from regulatory values due to improper distribution of air flows in living rooms of blocks of flats. The present work is aimed at obtaining a working mathematical model of natural ventilation system operation, and its further studying for optimization or modernization. The analysis of regulatory documents, research works of national and foreign scientists, developments in the field of natural ventilation and ventilation of residential buildings in general, as well as specific field experiments describing or mentioning similar problems has been carried out. The author’s mathematical model of air exchange in the living room has been presented and analyzed. The boundary conditions in the mathematical model were set as air flow rate and air temperature, and the temperature on the surface of the heater. The features and patterns of air flow distribution inside the room were determined, obtained as a result of mathematical modeling. The distributions of air velocity in the volume of the room were given. Similar problems were indicated for premises of residential buildings of a different functional purpose. Amendments to the existing standards, as well as technical solutions were proposed.
Methodology for improving the mechanical and operational properties of aircraft structural elements during its maintenance using gas pulse treatment
Authors: Ivanov D.
Published: March 2023

A methodology has been developed to ensure airworthiness by improving the reliability of structural elements of aviation and airfield equipment, which differs from the currently available ones by using new effective non-deformational technologies based on pulsating subsonic gas flows during all types of maintenance and repair. New technologies have been developed to improve the mechanical and operational properties of aircraft structural elements, applicable in the production of aviation equip-ment, in the process of its maintenance and repair, characterized by the ability to increase them in a complex, without deterioration of any parameters. The nature of the impact of unsteady subsonic gas flows on the structure and properties of aircraft structural elements made of metal and polymer materials, the stress states of products, and the corresponding physical model has been created. It is proposed to implement measures for the use of new non-deformational technologies for restoring operational properties, as well as improving the reliability and extending the life cycle of elements, parts and assemblies of aircraft, airfield equipment by transport companies that exceed the currently used efficiency, efficiency and envi-ronmental friendliness, making appropriate changes to the maintenance and repair regulations. The direction of improving the methodology for forecasting the technical condition of aircraft structural elements is indicated, which differs from the existing ones by taking into account data on the density of crystal structure defects in surface layers.
Planning the transport companies sustainable development efficiency
Authors: Vasilenko Marina , Kuzina Elena , Glinsky Alexander , Vasilenko Ekaterina , Limanchuk Leonid , Galkin Vyacheslav , Bozin Maxim , Zaryan Asya
Published: March 2023

An important role in ensuring sustainable development is assigned to the transport system. This is due to the fact that transport is the most important tool for solving social, economic and technological problems, and its functioning is accompanied by a negative impact on the environment, the occurrence of road accidents, causing harm to health. Planning as the most important management function allows to increase the socio-environmental safety and economic efficiency of the activities of railway transport enterprises, which means improving the quality of work. In the article, the authors compared approaches to strategic planning in the context of the concept of sustainable development of transport companies. The mechanism for the implementation of the ecological strategy of railway transport, which meets the requirements of economic efficiency, environmental safety and social responsibility, is disclosed. A block diagram of planning the socio-economic efficiency of the activities of railway transport enterprises in the system of environmental management is presented.
Advanced high-strength steels for automotive engineering
Authors: Iurchenko Aleksandr , Simonov Iurii
Published: March 2023

Diagrams of supercooled austenite decomposition are constructed for new steels of the Kh2G2C2MF alloying system. They provide the application of a science-based approach to the development and improvement of technological heat treatment processes with the use of furnaces with oxidising atmosphere. It is shown that the bainite transformation cannot exist separately from the martensite transformation even at slow cooling speeds. Regimes of heat treatment are selected, providing a possibility to receive the necessary structure for formation of a required complex of mechanical properties in a wide range. It is established that the most perspective heat treatment regime scheme from the point of view of time savings is continuous cooling from the heating temperature. It is revealed that the main structural components of steels after various heat treatment regimes are bainite and martensite, whose ratio determines the mechanical characteristics. Bainite is carbide-free, which favourably influences the complex of mechanical characteristics. The excessive ferrite and ferrite-carbide mixture formed in the structure at slow rates of continuous cooling in the upper temperature range do not affect the mechanical properties since their amount is insignificant. It is established that new economically alloyed steels with chromium, manganese, silicon, molybdenum, vanadium, and different carbon content belong to third-generation automotive steels, which gives prospects of using this material for manufacturing various automotive parts to improve the entire structure.
Heat exchange modeling between the air flow and the metro ventilation shaft lining in the conditions of St. Petersburg, Russia
Authors: Kozin Evgeny , Kozhukhov Yuri
Published: March 2023

Icing of the injection layer in underground tunnels and ventilation shafts leads to wear, destruction of supporting structures and flooding. In St. Petersburg the air temperature in winter can drop to -25 ° C, what can lead to these phenomena in the subway facilities. The article presents the modeling results of a viscous three-dimensional air flow, heat and mass transfer of a metro ventilation shaft in the Ansys CFX program. A numerical model of the ventilation shaft and the surrounding soil consisting of five layers has been developed: air; foam glass concrete; prefabricated cast-iron tubing lining; injection layer; soil massif. The parameters of the computational grid and the boundary conditions of the problem are specified. Two models of the ventilation shaft with an axial length of 1 m and 10 m were built. Temperature plots are constructed for three tasks, where the injection layer consists of water, wet clay soil and average between water and wet clay soil. The choice of overall thermal and technical characteristics of the thermal insulation material during the reconstruction of the existing ventilation shafts in three different sealing space conditions is confirmed.
Marketing and logistics – two sides of customer/consumer satisfaction
Authors: Mehmedov M.
Published: March 2023

Marketing and logistics are closely linked and represent a single complex that contributes to meeting needs. The marketing component is focused on determining the need itself, so what consumers want, and the logistics component gives an answer to the question of how the consumer will receive the desired product, and with minimal costs, in a convenient place and at the right time. The main tasks that marketing is designed to solve are: a detailed analysis of needs, an analysis of the market situation, the development of products that the consumer currently needs, the development of strategies for behavior in the market, the development of communications. And logistics should ensure the lowest costs for the delivery of goods and determine at what expense and at what stages these costs can be reduced. Thus, the joint integrated use of marketing and logistics will make the process of product distribution more efficient, which will help to receive higher revenues. In this article, the task is to make a study of the places of marketing and logistics in the enterprise management system and the interrelationship between them, analyzing the connections between the elements of the two activities. In the article, 5 conclusions are made, which give an opinion on the joint integration of the two elements in this management system.
Optimization of accounting and management accounting at an agricultural enterprise through document management reengineering in globalization conditions
Authors: Yekimov Sergey , Murenets Iryna , Saienko Volodymyr , Ganna Bulkot , Shmorgun Leonid , Sudorgin Mikola
Published: March 2023

The use of automated accounting programs in agricultural enterprises makes it possible to ensure the efficiency of accounting of business operations occurring at the enterprise. The speed of registration of business transactions depends on how quickly the primary accounting documentation is processed by the employees of the accounting department of the enterprise. Traditional paper accounting documentation in operation creates certain difficulties for the enterprise associated with the costs of its delivery to the contractors of the enterprise and the need to store it for some time in accordance with current legislation. This causes the associated additional costs of the enterprise. One of the ways out of this situation, in our opinion, may be the reengineering of document management at an agricultural enterprise based on the use of an electronic document management system. Electronic document management makes it possible to make document management more transparent and significantly speed it up. The integration of an electronic document management system and an accounting program will improve the efficiency of accounting and management accounting at an agricultural enterprise.
Designing a regional system of additional (pre-university) education in the context of staffing socio cultural modernization
Authors: Sergushina E. , Lomshin M.
Published: March 2023

The idea of additional education is one of the most pressing problems of our time. However, despite the changes in regulatory documents, where the concept of continuing education is given a “place of honor”, there is no consensus among scientists on what should be considered an additional education today.
Aspects of evaluation of the economic efficiency of using information modeling technology in the organization of construction production
Authors: Doroshin I. , Andreeva P. , Jadanovskiy B. , Kazaryan R.
Published: March 2023

Goal: development of an innovative method for the development of economically substantiated organizational and technological solutions that allow providing an optimal solution regarding the timing and cost of construction production, the method of its use, the economic substantiation for the use of this method in the development and implementation of construction organization plan (COP) for industrial facilities. Research objectives: study of the role and place of the construction organization project in the investment and construction process, the regulatory framework for the organization of construction production. One of the main research instruments is Building Information Modeling (BIM). The concept of BIM technology and controls are considered in relation to construction safety. Methods: systems approach, statistical and comparative analysis, international and domestic developments in the field of organization of construction production, economic and visual modeling, Building Information Modeling. Results: the tests of buildings and structures were analyzed in order to study the elements of quality systems of BIM technologies in planning, safety management of construction production. Conclusions: construction research shows that 4D Building Information Modeling (BIM) can improve planning, control and safety management at a construction site.
Perspectives of process-oriented approach development in cost management under digitalization conditions
Authors: Naugolnova Irina
Published: March 2023

The development of a process approach to cost management in a digital environment has great prospects. Firstly, the use of digital technologies allows for greater accuracy in cost accounting, which is particularly important for enterprises with large production volumes and numerous processes. Secondly, digitization enables the automation of many processes and reduces the human factor in cost management. Thirdly, digital technologies enable faster and more efficient data analysis and decisionmaking based on this data. One promising direction for the development of a process approach to cost management in enterprises is the use of blockchain technologies. Blockchain can provide transparency and security in storing and transmitting information about cost accounting between enterprises and their partners. This can be particularly important in areas where it is important to accurately track the origin and distribution of costs, such as in agriculture or food production. It is also worth noting that the development and use of artificial intelligence and machine learning can improve cost management processes and allow for faster and more accurate data analysis and decision-making. Overall, the development of a process approach to cost management in enterprises in a digital environment will continue, and its successful implementation will enable enterprises to optimize their costs, increase efficiency, and competitiveness in the market.
Alternative energy market in Russia: at the crossroads of interests and opportunities
Authors: Aleksandrov Igor , Daroshka Vitali , Trushkin Vyacheslav , Chekhovskikh Irina , Ol Ekaterina
Published: March 2023

The development of an alternative energy market in Russia within the strategy of forming a green economy is more promising task due to the high level of regulation and closed for entry of private investors, as well as the sufficiency of fossil hydrocarbons. At the same time, Russia understands the importance of participation in the processes of green transition and decarbonization of the national economy due to the commitments under the Paris Climate Agreement, as well as the presence of trade risks in terms of export of traditional energy assets (oil, gas) to the EU, UK, and, starting in 2020, to the PRC and Japan (despite the fact that there are no trade risks in the energy sector). - China and Japan (despite the sanctions on Russia’s energy sector, it still has the formal right to participate in tenders for international financing of "green projects"). The most promising proposals for the development of the alternative energy market and business activation are: the formation of a segment of "green finance" in the national stock market; the development of the practice of PPP models for the implementation of energy projects in the renewable energy sector; the formation of green finance departments on the basis of major banks; 4) the formation of export-oriented hydrogen production on the basis of oil and gas businesses.
Forming the complex quality indicator of social objects
Authors: Kuzmina Tatiana , Shesterikova Yana , Nikolenko Dmitry
Published: March 2023

One of the key priorities of government policy is to improve the quality of life of its citizens. The most important focus in this area is the construction of socially important infrastructure. A comprehensive approach to the problem of improving the quality of construction of social facilities, allows us to take into account various major factors affecting the quality of construction in general. Using the method of expert assessments, the most significant factors were identified. In the course of the experiment three levels of significance variation for each group of factors were studied. The method of determining the effectiveness of organizational and technological solutions during the construction of social facilities has been proposed.
Joint analysis of IMC resources: value for sustainable development
Authors: Burtseva Tatyana , Mironova Nataliya , Ageeva Olga , Turutin Boris
Published: March 2023

The article studies issue of the optimal structure of the IMC (integrated marketing communications) budget in order to improve the sustainability of the company's development. Authors propose the original
technique for the most optimal resource allocation structure based on the joint analysis procedure. This statistical method considers indicators of
relative importance of attributes and related utilities. Particular attention is paid to the issues of assessing the reliability of the joint analysis results, as
well as the possibility of their visualization. In addition, the article also considers the technology for visualizing the results and approaches to
interpreting the obtained data. The main approaches to assessing the reliability of research data are presented, with special attention to joint analysis criteria.
Was wissen Sie über … Selbstheilung?
Authors: Schmid Eva C.
Published: March 2023

In dieser Ausgabe beschäftigen sich alle Wissensquiz-Fragen mit Selbstheilung.
Lohnt sich ein Instagram-Auftritt?
Authors: Pietruck Vivien
Published: March 2023

Für einen Instagram-Praxis-Account gelten im Gegensatz zum Gewerbe die restriktiven Bestimmungen des Heilmittelwerbegesetzes, was eine ständige Überprüfung und Definierung zulässiger Inhalte notwendig macht. Das Betreiben eines Accounts erfordert unter anderem Konkurrenz- und Zielgruppenanalyse, Strategie, Zieldefinition, täglichen Content, Ads und eine Kosten-Nutzen-Rechnung. Für Ein-Personen-Praxen lohnt sich ein Instagram-Auftritt aufgrund des Aufwands und der geografischen Eingrenzung der Zielgruppe meist nicht.
Determination of thermal conductivity of eutectic Al–Cu compounds utilizing experiments, molecular dynamics simulations and machine learning
Authors: Nazarahari A , Fromm A C , Ozdemir H C , Klose C , Maier H J , Canadinc D
Published: March 2023

In this study, the thermal conductivity (

κ

) of Al–Cu eutectics were investigated by experimental and computational methods to shed light on the role of these compounds in thermal properties of Al–Cu connections in compound casting. Specifically, the nonequilibrium molecular dynamics (MD) method was utilized to simulate the lattice thermal conductivity (

κ

l

) of six compositions of Al–Cu with 5–30 at.% Cu. To extend the results of the MD simulations to bulk materials, instead of using conventional linear extrapolation methods, a machine learning approach was developed for the dataset acquired from the MD simulations. The bootstrapping approach was utilized to find the most suitable method among the support vector machine (SVM) with polynomial and radial basis function (RBF) kernels and the random forest method. The results showed that the SVM model with RBF kernel performed the best, and thus was used to predict the bulk

κ

l

. Subsequently, the chosen compositions were produced by induction casting and their electrical conductivities were measured via eddy current method for calculating the electronic contribution of

κ

using the Wiedemann–Franz law. Finally, the actual

κ

of the alloys were measured using the xenon flash method and the results were compared with the computational values. It was shown that the MD method is capable of successfully simulating the thermal conductivity of this system. In addition, the experimental results demonstrated that the

κ

of Al–Cu eutectics decreases almost linearly with formation of the Al2Cu phase due to increase in the Cu content. Overall, the current findings can be used to enhance the

κ

of cooling devices made via Al–Cu compound casting.
Extending WiMDA for the data analysis of µ
−SR experiments
Authors: Gill G J W , Pratt F L , Blundell S J
Published: March 2023

A software extension to the Windows Muon Data Analysis software package WiMDA has been developed for the analysis of µ
−SR data, which has been dubbed Negative-WiMDA. In designing Negative-WiMDA, some key features were considered: it should be easily accessed from the main analysis window of WiMDA; it should be able to account for multiple elements in a sample; it should be able to subtract signals treated as unwanted background, allowing the user to focus on a particular element of interest; it should be able to handle transverse-field (TF) data, and perhaps most importantly, it should be intuitive to use. The main features of Negative-WiMDA are presented here with a few examples of their use.
Tracking decay positrons in a magnetic field for muon microscope applications
Authors: Young C , Kojima K M
Published: March 2023

We present a theoretical calculation for a feasibility study of the Muon Microscope, which is intended to add positional resolution within the sample by tracking down the positron trajectories to its source positions. In the presence of a magnetic field, any positrons whose trajectories have components which are perpendicular to the magnetic field will start to move in a helical path due to the Lorentz force. Taking special relativity into account, we have analytically determined the trajectories of the positrons in a uniform magnetic field. We also evaluate more realistic cases, such as finite detector spatial resolutions, as well as the effect of positron scattering from the materials in its trajectory.
Non-destructive operando measurements of muonic x-rays on Li-ion battery
Authors: Umegaki I , Kondo Y , Tampo M , Nishimura S , Takeshita S , Higuchi Y , Kondo H , Sasaki T , Shimomura K , Miyake Y
Published: March 2023

We have developed a non-destructive technique to observe Li in an electrode and metallic Li deposition on an anode using muonic x-rays. With high intent negative muon beam at J-PARC, we have attempted operando measurements of Li and metallic Li deposition in LIBs for the first time. Both increase and decrease of Li in a cathode during charging and discharging processes were observed. We also observed significant increase of muonic x-rays of Li with cycles, which may correspond to the degradation of charge capacity with the cycles.
Status of the new muonic helium atom HFS measurements at J-PARC MUSE
Authors: Strasser P , Fukumura S , Ino T , Iwai R , Kanda S , Kawamura S , Kitaguchi M , Nishimura S , Oku T , Okudaira T , Seo S , Shimizu H M , Shimizu K , Shimomura K , Tada H , Tanaka T , Torii H A , Yamauchi H , Yasuda H
Published: March 2023

Measurements of the muonic helium atom hyperfine structure (HFS) are a sensitive tool to test the theory of three-body atomic systems and bound-state quantum electrodynamics (QED) and to determine fundamental constants of the negative muon magnetic moment and mass. The world’s most intense pulsed negative muon beam at J-PARC MUSE brings an opportunity to improve previous measurements and test further CPT invariance by comparing the magnetic moments and masses of positive and negative muons. Test measurements at D-line are now in progress utilizing MuSEUM apparatus at zero field. The first results already have better accuracy than previous measurements in the 1980s. Also, the investigation of a new experimental approach to improve HFS measurements by repolarizing muonic helium atoms using a spin-exchange optical pumping (SEOP) technique was started. If successful, this would drastically improve the measurement accuracy.
TRIM Simulations Tool for µ
+ Stopping Fraction in Hydrostatic Pressure Cells
Authors: Elson Frank , Das Debarchan , Simutis Gediminas , Forslund Ola Kenji , Miniotaite Ugne , Palm Rasmus , Sassa Yasmine , Weissenrieder Jonas , Månsson Martin
Published: March 2023

For quantum systems or materials, a common procedure for probing their behaviour is to tune electronic/magnetic properties using external parameters, e.g. temperature, magnetic field or pressure. Pressure application as an external stimuli is a widely used tool, where the sample in question is inserted into a pressure cell providing a hydrostatic pressure condition. Such device causes some practical problems when using in Muon Spin Rotation/Relaxation (µ
+SR) experiments as a large proportion of the muons will be implanted in the pressure cell rather than in the sample, resulting in a higher background signal. This issue gets further amplified when the temperature dependent response from the sample is much smaller than that of the pressure cell,which may cause the sample response to be lost in the background and cause difficulties in aligning the sample within the beam. To tackle this issue, we have used pySRIM [1] to construct a practical and helpful simulation tool for calculating muon stopping fractions, specifically for the pressure cell setup at the µE1 beamline using the GPD spectrometer at the Paul Scherrer Institute, with the use of TRIM simulations. The program is used to estimate the number of muon stopping in both the sample and the pressure cell at a given momentum. The simultion tool is programmed into a GUI, making it accessible to user to approximate prior to their experiments at GPD what fractions will belong to the sample and the pressure cell in their fitting procedure.
Intense Lyman-alpha light source for ultra-slow muon generation
Authors: Oishi Y , Adachi T , Saito N , Ikedo Y , Ishida K , Kanda S , Umezawa T , Kamioka S , Teshima N , Nakamura J , Nakamura S , Miyake Y , Iwasaki M , Wada S , Shimomura K
Published: March 2023

A small-momentum-width muon beam, so-called ultra-slow muon beam, can be generated by laser ionization of muonium. To realize efficient ultra-slow muon generation, the Lyman-alpha and below 360 nm coherent light are required to resonantly excite the muonium from the ground state to 2p and sequentially ionizes excited muonium to the unbound state. At the J-PARC MLF Ultra-Slow Muon beamline, we have successfully generated Lyman-alpha coherent light exceeding 10 μJ using an all-solid-state laser and high-efficiency vacuum ultraviolet light generation technologies. In this paper, we will describe the intense Lyman-alpha light source.
Online learning to train users of muons and neutrons at ISIS
Authors: Baker P J , Hall S C L , Mukhopadhyay S , Cottrell S P , Hillier A D
Published: March 2023

Online learning is being adopted across a wide range of disciplines, providing remote access to resources that serves to widen participation in training, and allowing courses to be created that are accessible to the diverse range of learning styles that have recently been identified. Online resources can also be used to supplement more traditional in-person training by bringing a cohort of learners up to a common minimum level beforehand, distributing materials during training, and reinforcing learning after the event. Over the last six years ISIS has developed a range of online learning materials about muon and neutron science, that can be used independently or in association with in-person training. Here we discuss the materials now available and how they were designed to work effectively, set out the opportunities and challenges of online training for facility users, and summarise planned future developments.