bluuebunny/crossref_metadata_2025 huggingface dataset:
The effect of receptive music therapy on older adults with mild cognitive impairment and depression: a randomized controlled trial
Authors: Xue Bing , Meng Xianmei , Liu Qiuxia , Luo Xianwu
Published: December 2023

This study aims to evaluate the effects of a receptive music therapy intervention on cognitive functions and depressive symptoms in older adults with MCI. A randomized controlled trial was conducted in Wuhan, China. Eighty older adults, over 65, who had MCI and depression symptoms were randomly divided into the intervention and control groups. The intervention group received usual nursing care plus receptive music therapy intervention four times a week, for eight weeks; the control group received usual nursing care during the same period. The linear regression analysis was used to compare the difference between groups. There was a significant difference in the intervention group for the pre-intervention and post-intervention scores of cognitive function and depression. There was no significant difference in the control group before and after the study period and a significant between-group difference in both cognitive function and depression. In conclusion, receptive music therapy intervention significantly improved cognitive function and reduced depressive symptoms in older adults with MCI. It could be widely used in communities and nursing homes to improve the quality of life of older adults.
Observation of the validity of the upper lip bite test in predicting difficult intubation
Authors: Tang Xinyuan , Dong Zhiyuan , Xu Jianling , Cheng Pingping , Wang Mingfang , Wang Bin , Jiang Xiaogan , Yao Weidong
Published: December 2023

The upper lip bite test (ULBT) is considered an effective method for predicting difficult airways, but data on the ULBT for predicting difficult tracheal intubation are lacking. This study aimed to examine the clinical utility of the ULBT in predicting difficult endotracheal intubation. We conducted an observational case-cohort study of adult patients undergoing elective surgery and requiring endotracheal intubation for general anesthesia. Difficult airway assessment was performed on the recruited patients before the operation, including the ULBT, mouth opening, thyromental distance, modified Mallampati test, and body mass index. The primary outcome was the incidence of difficult tracheal intubation. The receiver operating characteristic curve analysis was used to compare the performance of variables in predicting difficult tracheal intubation. We successfully recruited 2522 patients for analysis and observed 64 patients with difficult tracheal intubation. When predicting difficult tracheal intubation, grade 2 ULBT had a sensitivity of 0.75 and a specificity of 0.54, and grade 3 had a sensitivity of 0.28 and a specificity of 0.75. Compared with mouth opening, the area under the receiver operating characteristic curve of the ULBT was lower in predicting difficult tracheal intubation (0.69 [95% confidence interval: 0.67–0.71] vs. 0.84 [95% confidence interval: 0.82–0.87], P < 0.05).

Clinical Trials Registry: ChiCTR-ROC-16009050, principal investigator: Weidong Yao.
Precise stepwise recovery of platinum group metals from high-level liquid wastes based on SDB polymer-modified SiO2
Authors: Wu Kun , Ning Shunyan , Yin Xiangbiao , Xu Sizhi , Zhong Yilai , Li Zengyuan , Chen Lifeng , Hamza Mohammed F. , Fujita Toyohisa , Wei Yuezhou
Published: December 2023

Accurate separation and efficient recovery of platinum group metals (PGMs, mainly Ru, Rh and Pd) from high level liquid waste (HLLW) is a good choice for clean production and sustainable development of nuclear energy.
Revisiting ion-pair interactions in phase transfer catalysis: from ionic compounds to real catalyst systems
Authors: Iribarren Iñigo , Mates-Torres Eric , Trujillo Cristina
Published: December 2023

This study delves into ion-pairing in phase-transfer catalysis, analysing ionic compounds and diverse catalyst models. It bridges theory and application, offering valuable insights into ion-pair interactions using computational approaches.
Dilute polyelectrolyte solutions: recent progress and open questions
Authors: G. Lopez Carlos , Matsumoto Atsushi , Shen Amy Q.
Published: December 2023

We highlight key results and outstanding questions emerging from recent literature, aiming to provide readers with a comprehensive overview of the latest advancements in understanding the conformation and dynamics of polyelectrolytes in dilute solutions.
A novel fault localization method for asymmetric phase‐to‐ground faults on onshore wind farm collector lines without phasor measurement
Authors: Ding Jia , Zhu Yongli
Published: December 2023

Existing fault localization methods for power lines are not applicable to the collector line in onshore wind farms due to the dense access of complex power supplies. Therefore, a fault localization method based on equivalent zero‐sequence injection current (ZIC) is proposed for asymmetric phase‐to‐ground faults on collector lines. Firstly, the idea of load shifting is adopted to generalize the theory of equivalent injection current (EIC) to multi‐terminal and meshed lines. Then, considering features of the zero‐sequence network of wind farms, the EIC theory on two‐terminal and multi‐terminal lines is applied to zero‐sequence networks, and thus faulty areas, faulty sub‐lines, and fault distance can be determined. Attractively, the element correlation in node impedance matrices of zero‐sequence networks is derived from the network branch‐addition process, and the numerical characteristic of matrix elements is further revealed from the particularity of wind farms, based on which root‐mean‐square (RMS) calculation of ZIC can be improved to enable the localization without phasor measurement. Verification results prove that this proposed method can accurately realize the fault localization independent of wind turbine generators with a few measurement points, and the applicability of collector lines with line branches is also considered; additionally, only voltage RMS needs to be measured.
The history of star-forming regions in the tails of six GASP jellyfish galaxies observed with the Hubble Space Telescope
Authors: Werle A. , Giunchi E. , Poggianti B. , Gullieuszik M. , Moretti A. , Zanella A. , Tonnesen S. , Fritz J. , Vulcani B. , Bacchini C. , Akerman N. , Kulier A. , Tomicic N. , Smith R. , Wolter A.
Published: December 2023

Aims. In this work, we aim to characterize the stellar populations of star-forming regions detached from the stellar disks of galaxies undergoing ram-pressure stripping.

Methods. Using images collected with the WFC3 camera on board of the Hubble Space Telescope, we detected stellar clumps in continuum-subtracted Hα and the ultraviolet (F275W filter); such clumps are often embedded in larger regions (star-forming complexes) detected in the optical (F606W filter). Our sample includes 347 Hα clumps, 851 F275W clumps, and 296 star-forming complexes. We modeled the photometry of these objects in five bands using BAGPIPES to obtain their stellar population parameters.

Results. The median mass-weighted stellar ages are 27 Myr for Hα clumps and 39 Myr for F275W clumps and star-forming complexes, but the oldest stars in the complexes can be older than ∼300 Myr which indicates that star formation is sustained for long periods of time. Stellar masses vary from 103.5 to 107.1 M⊙, with star-forming complexes being more massive objects in the sample. Clumps and complexes found further away from the host galaxy are on average younger, less massive, and less obscured by dust. We interpret these trends as due to the effect of ram pressure in different phases of the interstellar medium. Hα clumps form a well-defined sequence in the stellar mass–SFR plane with a slope of 0.73. Some F275W clumps and star-forming complexes follow the same sequence while others stray away from it and passively age. The difference in mean stellar age between a complex and its youngest embedded clump scales with the distance between the clump and the center of the optical emission of the complex, with the most displaced clumps being hosted by the most elongated complexes. This is consistent with a fireball-like morphology, where star formation proceeds in a small portion of the complex while older stars are left behind producing a linear stellar population gradient. The stellar masses of star-forming complexes are consistent with the ones of globular clusters, but their stellar mass surface densities are lower by 2 dex, and their properties are more consistent with the population of dwarf galaxies in clusters.
The SEM and TEM study on the structure of organic scaffold (conchix) isolated from Mytilus edulis L. mussel shells
Authors: Derkach Svetlana , Salnikov Vadim , Kravets Peter , Tyukina Olga , Glukharev Andrey , Zuev Yuriy , Kuchina Yuliya
Published: December 2023

Demineralised shell of marine molluscs represents an scaffold matrix or conchix and a promising mineral-free biomaterial. The purpose of this work was to study the microstructure of the demineralized shell of the mussel Mytilus edulis L. – an organic matrix isolated with various decalcified reagents – a solution hydrochloric acid HCl and a solution of ethylenediaminetetraacetic acid disodium salt Na2-EDTA. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used as experimental methods in this study. It is shown that the chemical nature of the demineralising reagent determines the structural features of the studied conchix samples, their three layers – periostracum, prismatic layer and nacreous layer in particular. Treatment of mussel shells with HCl solution to remove calcium carbonate leads to partial destruction of the biopolymer structure of the binding organic matrix of mussel shells. Gentle treatment of mussel shells with EDTA solution ensures the preservation of the native structure of the organic matrix. This mineral-free biopolymer has high potential for using in food industry and biomedical applications.
The design project of a device to solve the problem of pollination connected with bee extinction
Authors: Atsharyan A. , Baghdasaryan A. , Melikyan A. , Paytyan T. , Movsesyan A.
Published: December 2023

The extinction of bees is a real challenge for the world ecosystem. It is estimated that honey bees pollinate about 80% of all flowering plants, including more than 130 types of fruits and vegetables, therefore, the extinction of honey bees could lead to the change of the whole biological chain. In this research, the danger of bee destruction and its consequences are discussed. Parallels are drawn between modern technical and conceptual solutions to the problem. The result of the research is the design project of a pollinating device developed by the group of specialists from NUACA (National, University of Architecture and Construction of Armenia), as a real technical solution to the problem mentioned above. The main characteristic features such as bionic and technical solutions of the device are presented as well. The predicted results of the device implementation are discussed.
Modelling sustainable development of industrial systems
Authors: Dyrdonova Alena
Published: December 2023

This paper describes a methodological approach that has been developed by the authors for assessment and modelling of sustainable development of industrial systems. Based on experimental testing of this methodological approach applied to the Republic of Tatarstan as an exemplary region, the authors have determined the industry-specific trends in terms of sustainable development of industrial complexes, which are regarded as the dominant elements of the sustainable economic growth process with prevalence of the upstream and high-tech sectors of the economy, along with unstable industries represented by low-tech sectors, as well as the so-called economic growth reinforcing industries. For each identified industrial group, prospects of growth and development have been evaluated as well. In this study the authors have also developed the sustainable growth models involving the models of production functions relevant to definite industrial groups (clusters). The authors furthermore have identified the key factors that are instrumental in better functioning of such groups (clusters). In the course of the production functions modelling, a closer connection between the economic potential and human capital has been tracked, which is particularly exemplified by two out of the three clusters being under review in this paper, namely, in volatile sectors of the economy, as well as in the economic growth reinforcing industries, but with one exception, however, involving the cluster of the economic development dominant elements – the upstream sector of the economy. As such, based on the resulting data, this study sets out the proofs of the “growing heaviness” of the economic development process due to the capital-intensive elements of the upstream sector of the economy, as opposed to a more flexible factor – the human capital.
Recognition algorithms based on the construction of threshold rules using two-dimensional representative pseudo-objects
Authors: Fazilov Shavkat , Mirzaev Nomaz , Radjabov Sobirjon , Mirzaev Olimjon , Meliev Farkhod
Published: December 2023

The development of recognition algorithms is discussed in the article; they are built using threshold rules based on representative pseudo-objects that provide a solution to the recognition problem in conditions of high dimensionality of feature space. A new approach is proposed, based on the formation of a set of two-dimensional base pseudo-objects and the determination of a relevant set of two-dimensional threshold proximity functions when constructing an extreme recognition algorithm. A parametric description of the proposed recognition algorithms is given, presented in the form of a sequence of computational procedures, the main of which are procedures for determining: 1) groups of tightly coupled features; 2) a set of representative features (RF); 3) groups of tightly coupled pseudo-objects in the RF subspace; 4) difference functions between objects in the two-dimensional subspace of RF; 5) groups of tightly coupled pseudo-objects in the RF subspace; 6) a set of basic pseudo-objects; 7) difference functions between the basic and simple pseudo-object in the two-dimensional RF subspace; 8) functions that differentiate between a pseudo-object and a class; 9) discriminant functions in the two-dimensional subspace of RF; 10) groups of tightly coupled separating functions; 11) basic separating functions in each group and 12) integral recognition operator for basic discriminant proximity functions. The results of a comparative analysis of the proposed and known recognition algorithms are presented. The main conclusion is that the implementation of the approach proposed in this study allows us to move from a given feature space to a space of RFs of lesser dimension.
Improving the quality indicators and performance of logical blocks and static memory of the microprocessor as part of improving the energy efficiency of devices
Authors: Zolnikov Vladimir , Reznichenko Vyacheslav , Arakelyan Gleb , Manukhina Lyubov
Published: December 2023

The study is aimed at consideration of improving the energy efficiency of devices. The article discusses methods for ensuring resistance to heavy charged particles (HCP) of a microprocessor RAM unit . A description of the implementation and a block diagram of static memory based on dummy blocks is provided. The work discusses methods of combating the biopolar effect, which are aimed at controlling the potential of the transistor body and reducing resistance. The dependence of the critical charge of a SOI memory cell on the gain of a parasitic biopolar transistor is modeled. To increase the fault tolerance of combinational circuits consisting of control logic and decoder blocks, redundancy is used at the level of individual gates. The article is considered to be useful for IT engineers and energy engineers, as well.
Methodology for designing microcircuits of various levels of CAD description taking into account quality indicators and energy efficient production
Authors: Zolnikov Konstantin , Skvortsova Tatiana , Zatorkina Kristina , Matusevich Alexander
Published: December 2023

The article considers the aspects of design of the microcircuits used in energy engineering. The principles of designing microcircuits at various levels of description in computer-aided design systems are considered. Recently, small design standards and the possibility of regular exposure of the device to radiation in conditions of energy efficient production has become particularly relevant. Hence, this requires the creation of special libraries and test environment tools. The structures of microcircuit design processes are presented at the top level and at the level of complex functional blocks. A functional modeling diagram is shown. Combined hardware and software verification, its features and problems are analyzed. It is shown that the main elements are libraries, debugging tools and a test environment. An important point is the restrictions imposed on development during design.
Aligning the environmental and social values of the sustainable development concepts, Industry 5.0 and Society 5.0
Authors: Mingaleva Zhanna , Startseva Olga , Gerasimov Anatoly
Published: December 2023

The relevance of the issue is due to the intensification of global crisis phenomena in the field of ecology and social sphere, the increasing imbalance of the world economy, the insufficient scale of implementation in practical activities of environmental and social aspects of development that contribute to the sustainable growth of society. Goal of the issue is to identify how the environmental and social values of modern global sustainable development are taken into account in regulatory international and national documents, in the concepts of Industry 4.0, Industry 5.0 and Society 5.0 and how they are consistent with each other. Research methods include bibliographic analysis, comparative analysis, cliometric methods, modeling. The reports and scenarios of the Club of Rome for 1972-2023, studies of large consulting companies were used as a database. Results. The study revealed a gradual strengthening of the role and importance of environmental and social values in international documents and policies in the field of sustainable development. However, these rates are not sufficient to form favorable trends in the field of sustainable development and overcome the movement of humanity along the trajectory of the crisis. Conclusions. Based on the results of the study, it was concluded that following only economic goals without an active transition to achieving environmental and social goals based on corresponding values leads humanity to climate and social crises.
Project-based learning technology in classes for technical and it-orientating groups: Experience and results of implementation
Authors: Tsoy Alla , Ten Svetlana , Rakhimova Alla
Published: December 2023

In today’s world, where technology continues to transform and innovation is becoming an integral part of our lives, it is becoming increasingly important to give children the opportunity to learn practical skills that will be useful to them in their future careers. Introducing technical and IT specialisms early in their education allows children to develop an interest and ambition in this area. One of the effective approaches in teaching has become project-oriented learning with the use of modern technologies. This method allows students to actively and practically apply their knowledge and skills by working on real projects. Within this approach, students not only learn theory, but also apply their knowledge in practice, which allows them to remember and learn the material better. When project-oriented learning using technology was implemented in classes for technical and IT-oriented groups, the results of implementing this methodology were impressive. Students involved in projects showed more interest and motivation in learning, as they saw direct practical value in the material being learnt. In addition, this approach develops in students a range of skills that are essential in today’s world, such as communication, co-operation, problem solving, critical thinking, etc. Project-based learning also promotes creative thinking and innovation. The experience of implementing project-oriented learning using technology in classrooms for technical and IT-oriented groups confirms its effectiveness and significance. Such an approach improves learning outcomes, motivates students and develops not only specific technical skills but also general competences necessary for a successful career in the modern world. Therefore, the use of project-oriented learning and technologies in the education of technical and IT-oriented groups is a relevant and integral component of modern curricula.
Development of a university’s intellectual capital within “ontologisation”
Authors: Belova Elena , Khabarov Valeriy , Kratasyuk Valentina , Volegzhanina Irina
Published: December 2023

This article introduces the concept of Networked Self-Developing Education System (NSDES). Such a system could be considered a modern university with a triple network structure where network team interactions between representatives of science, education and production are developed. A new model to explain NSDES intellectual capital development management is described. The model includes four interrelated parts (intellectual property, human, organisation and consumer types of capital). An important NSDES function is to provide conditions for lifelong self-development of scholars and students’ mastery of the scientific method. This is especially important for interdisciplinary natural sciences (biophysics, etc.). The NSDES has its integrative resource potential to meet this challenge. Such potential is accumulated in the open knowledge base and can be transferred to the education process provided knowledge is standardised in an ontology format. To build a course ontology to study the bioluminescent enzyme technology, the experience of developing ontology-based education solutions for railway universities which are evolving into “knowledge factories” is useful. Thus, “ontologisation” is proved to be a trend in the digital transformation of NSDES. The model’s implementation through ontology-based education solutions will create a foundation for the development of students’ research competences to solve urgent problems in sciences and industries.
Research on the possibility of improving energy efficiency in the hospitality industry
Authors: Pirogova Oksana , Dovganeva Yuliya , Temnova Nataliia , Lavrova Tatiana
Published: December 2023

In the structure of commercial real estate, hotel infrastructure facilities occupy a special position due to their dependence on related industries: tourism, both international and domestic, entertainment industry, event organization, business environment development, etc. Also, this industry is most affected by external factors: legal, political, economic, infrastructural, communication, cultural. Trends in the introduction of energy-efficient technologies in the processes of operation and maintenance of real estate objects of the hospitality industry allow to increase their competitiveness and increase the number of transactions. The leaders in the number of investment transactions in the hotel real estate segment for 2022 are traditionally Moscow and St. Petersburg, but the development of domestic tourism gives impetus to increased investment activity in other regions of the Russian Federation. The purpose of the study is to identify the impact of the energy efficiency level on the competitiveness of hotel real estate. Research objectives: analysis of trends in the hotel real estate market, determination of indicators of competitiveness of hotel facilities depending on the type of accommodation, consumer requests and the level of energy efficiency, calculation of the integral indicator of competitiveness of hotel real estate. Research methods: comparison, analysis and synthesis, generalization, expert evaluation method. As a result of the study, the key factors of the competitiveness of hotel facilities are identified and the methodology for calculating the integral indicator of competitiveness is given.
Impact of board characteristics on firm green, sustainability and competitiveness performances
Authors: Lim Cristina Teresa , Tanpoco Manuel , Cordova Wilson , Atendido Jan Nathalia
Published: December 2023

This explores the association between corporate governance mechanisms and firm green, sustainability and competitiveness performances in the Philippines. To evaluate the association between board characteristics and firm green, sustainability and competitiveness performances, a two-step system generalized method of moments (GMM) was utilized. Board size, board independence, CEO duality, management shareholding, and multiple directorships are the characteristics examined. Firm green, sustainability and competitiveness performances is measured using indicators such as return on assets (ROA) and Tobin’s Q ratio. Outcomes denote that board size, multiple directorships, and leverage have negative statistical relationships with firm green, sustainability and competitiveness performances using ROA as a financial measure. Moreover, firm size has a positive statistical relationship with ROA. This accords with the recent literature on corporate governance mechanisms. Enigmatically firm size has negative and statistical relation with firm green, sustainability and competitiveness performances using Tobin’s Q ratio as a measure of financial performance. Leverage has also been found to be positively related to firm performance. The consequence of this study clamps significant implications for practitioners and policymakers in developing countries, specifically in the Philippines. This will postulate insights into the crucial role of corporate governance practices in improving the green, sustainability and competitiveness performances of firms and accentuate the necessity to establish and enforce strong corporate governance mechanisms and regulations.
Research on the impact of educators’ motivations toward their professional and ecological competences development
Authors: Kuo Lung-Hsing , Tsai Pei-Hua
Published: December 2023

Considerable research has been conducted based on the assumption that educators’ intention on ecological and professional competences development is associated with educators’ genders and different institute locations. In this study, researchers go beyond the previous studies by synthesizing relevant empirical research on the topic has been limited to individual investigations of the links between educators’ self-reported motivations and self-reported institute locations. The purpose of this study was to systematically analyze the research exploring how different genders and institute locations affect educators’ motivations on PD. After applying meta-analysis technology to integrate and analyze relevant empirical studies, the major findings as follows: First, analysis of 48 studies representing 15,038 participants reveals a positive correlation (ES=0.10, 95%CI=0.09~0.12) between overall different genders and educators’ motivations on ecological and professional competences development. The strongest effect found was for ‘expectations from others’, while the smallest was ‘pursue toward achievement’. While the strongest effect found on the intentions of ‘female’ educators was for avoidance/stimulation, the smallest effect was organizational development for ‘male’ educators. Second, analysis of 67 studies representing 4,442 participants reveals a positive correlation (ES=.083, 95%CI=0.06~0.10) between overall different institute locations and educators’ motivations on ecological and professional competences development. The strongest effect found was in institutes in ‘suburban’ areas while the smallest effect was in ‘county’ areas. Implications and suggestions for future research will be discussed.
Effect of sustainability and ecological knowledge management on knowledge creation and team learning of MICE professional teachers
Authors: Chang Wan-Yu
Published: December 2023

In face of the waves of globalization, democratization, and knowledge-based and green sustainable economy, schools and MICE professional teachers, in the 21st century, should break through the independent and closed classroom kingdom in the past but, with open attitudes, have themselves become the managers of sustainability, ecological and professional knowledge learning for the sustainable development of schools. Individual knowledge and experience could be accumulated through sustainability, ecological and professional knowledge management and organizational learning to become organizational knowledge to further improve the movement of schools, promote the quality of education, cultivate excellent talents, and enhance national competitiveness and environmentally friendliness. Aiming at universities in Taiwan, university faculty is distributed 350 copies of questionnaire in this study. Total 287 valid copies are retrieved, with the retrieval rate 82%. The research results show significantly positive effects of 1. sustainability, ecological and professional knowledge management on team learning, 2.team learning on knowledge creation, and 3. sustainability, ecological and professional knowledge management on knowledge creation. Finally, according to the results, suggestions are proposed, expecting to have schools comprehend the importance of MICE professional teachers’ sustainability, ecological and professional knowledge management and further propose effective coping strategies to promote the overall performance.
The impact of tourism at the end of the 20th and the beginning of the 21 century on sustainable development of the South of Russia
Authors: Kuzmina Anna , Bogatkevich Tatiana , Olefirenko Olga , Katamadze Nadezhda , Glotova Aleksandra
Published: December 2023

Tourism plays a key role in the economy of the Republic of Crimea, determines the dynamics of development of the region as a whole and affects the prosperity of other industries, such as the food industry and agriculture. Natural conditions, warm climate and picturesque coastline of two seas with kilometres of beaches, as well as unique historical monuments, landscape complexes and cultural objects create ideal conditions for providing a comfortable holiday in Crimea. Nevertheless, there are several challenges faced by those wishing to vacation in the resorts of the peninsula, which require a solution, first of all, the issues of transport logistics. In order to understand the main problems faced by the tourism business in the region at present and to assess the prospects open to the Crimean economy in this area, the development of the industry in the Soviet and post-Soviet periods was analysed. Based on historical and statistical data, the reasons for the attractiveness of the peninsula as an object of tourism development in Russia are shown and the prospects opening up in this area are determined.
Formation of environmental competencies of employees for the purposes of resilience and sustainable development
Authors: Mingaleva Zhanna , Kuznetsov Andrey , Lomonosova Yana , Mingalev Andrey
Published: December 2023

The relevance of the issue is due to the strengthening of demands for environmentally sound behavior on the part of all subjects of society, including business, entrepreneurs, owners, managers and employees of enterprises, and public service bodies. Goal of the issue is to identify the possibility of applying a competency-based approach to the process of developing norms, rules and psychology of behavior, work skills and habits, and a way of thinking in the spirit of special and social justice among employees. Research methods include bibliographic analysis, comparative analysis, and modeling. Results. The study revealed the possibility and feasibility of using the Adapted 5-component competency model in the practice of developing environmental competencies among employees and managers of any organizations. Conclusions. Based on the results of the study, it was concluded that the comprehensive and interconnected formation of the entire block of basic competencies in people allows to achieve the goals of sustainable and balanced development to the greatest extent, taking into account social and environmental values.
Increasing traffic safety of passenger cars by modernizing the central cradle suspension of the passenger trolley
Authors: Martynenko L.V.
Published: December 2023

To implement the conditions for ensuring the established volume of transportation on the serviced site with complete safety and minimal costs for performing the required volume of work, it is necessary to maintain a fleet of passenger cars in a technically sound condition, carry out maintenance and repair of passenger cars in accordance with the current rules and tasks established by the railway, as well as carrying out effective commercial and economic work, developing or modernizing car parts and assemblies to ensure the required safety and, accordingly, carrying out developments with minimal costs for Russian Railways as a whole under the current system, which manages to satisfy the maximum needs of enterprises by using a minimum amount of resources. Sufficient production of some types of products is not carried out to the detriment of others, because the country has achieved a high level of labor productivity, modern technologies are used that allow saving raw materials, fixed assets are not idle, but are used at full capacity. For some parts and assemblies, the possibility of modernization can be absolutely simple and practical, in terms of costs they are economical and have a minimum payback period.
Calculation of the speed of movement of the car along the entire length of the path profile with different inclines of the sorting slide
Authors: Rustamov Nassim , Kasimova Asal , Tursunkhodjaeva Rashida , Tashmatova Mukaddas
Published: December 2023

In the article, a formula derived on the basis of the kinetic energy change theorem for a non-free material point in a finite form is used to calculate the speed of movement of the car on various sections of the sorting slide. Examples of calculations show that in the intermediate section of the sorting slide to the dividing switch, the relative calculation error is 10.3%, in the section of the switching zone of the sorting slide of the second dividing switch – δv6s2 ≈ 9.0 %, in the section of the first sorting path – δv7 ≈ 16.1%.
Prospects of cargo transportation within the borders of the countries of the 1520 Railway Gauge Space
Authors: Zhuravleva Natalia , Chechenova Liana
Published: December 2023

Objective: to assess the importance of cargo transportation for the economy of the 1520 countries. This study confirms the need to expand the capabilities of the railway infrastructure despite the consequences of sanctions restrictions, the uncertainty of the international political situation and the imbalance of trans-Eurasian container transportation in order to achieve economic growth of the national economies of the 1520 countries. Methods: methods of data analysis and diagnostics (observation, analysis, synthesis) of regulatory legal provisions regulating relations within the framework of freight transportation on the railway network, as well as reports of leading railway companies of the 1520 countries - JSC “Russian Railways”, JSC “NC “Kazakhstan Temir Zholy”, Belarusian Railway are used etc., Russian and foreign forwarding companies, carrier operators, data from the Federal Customs Service of the Russian Federation and foreign customs authorities, statistical and analytical information databases. Results: The characteristic of the main railway systems of the leading countries of the 1520 Space is given, specifying the number of international and domestic container and container-trailer routes. The factors influencing the development of cargo transportation on the territory of Russia along the 1520 gauge are identified, the prospects for cargo transportation are assessed taking into account the current state of the transport and logistics market in Russia. Practical significance: the results obtained are of an applied nature, since they propose and justify a number of measures to ensure the effective development of cargo transportation, taking into account existing infrastructure constraints.
Impact of solar radiation on the climate of a passenger car
Authors: Inoyatov Kamoliddin , Abdullaev Bakhrom , Rakhmatov Khamza
Published: December 2023

The volume of passenger traffic is constantly growing. Accordingly, the requirements for passenger transportation conditions are increasing - it is necessary to ensure improved comfort. Since the travel routes of passenger cars follow different climatic zones, comfort dictates the need to maintain a constant temperature in the car - 22-26˚C in summer, 20-24˚C in winter. The temperature regime in the car also depends on the materials used in car construction, namely: the heat transfer coefficient, the thermal properties of the car materials. In addition, window openings of passenger cars also participate in heat transfer processes, which also affects the climatic conditions in the car. The article presents the results in the form of calculations and graphs of temperature dependences of the influence of solar radiation on climate (temperature conditions) in a passenger car.
Prospects for the development of wind energy in Russia: A geopolitical aspect
Authors: Alеshkovski Ivan , Andreev Aleksey , Gadzatsev Kirill , Belousova Alina
Published: December 2023

The geopolitical changes that took place in the international arena in 2022, most of which are still ongoing, could not but affect the Russian wind energy industry. The article discusses the consequences of these changes and possible scenarios for further development of the industry, taking into account Russian specifics. The energy strategy of Russia for the period up to 2035, the Strategy of socio-economic development of Russia with low greenhouse gas emissions for the period up to 2050 are analyzed. The potential of the Russian Federation in the field of wind energy is shown. The prospects of cooperation with other countries in order to form a technological base for the manufacture of wind power plants are presented.
Possibilities for increasing energy and hydraulic efficiency in water supply systems
Authors: Sahakyan Aram
Published: December 2023

The article touches upon modern approaches to increasing the efficiency of water supply systems intended for drinking and economic needs. In particular, the problem of the possibility of converting the available hydraulic energy into electrical energy on the drinking water gravity aqueducts without disturbing the hydraulic regime of the system is observed. The presented example of the proposal introduction entailed the energy-economic indicators in the water supply systems of Yerevan, the Republic of Armenia. According to calculations, the amount of electricity produced by the proposed small hydropower plants (SHPP) on the aqueducts feeding Yerevan City can be at least 105 million kW per year, which exceeds the amount of electricity currently consumed in the water supply system for more than 3 times. In order to increase the energy and hydraulic efficiency of water supply systems, it has also been proposed to establish an appropriate performance indicator, the application of which will create an obligation for water supply organizations to make investments in the indicated area. The energy efficiency and loss reduction alternatives analyzed in the work can serve as an opportunity for decreasing the dependence of water supply systems on external energy sources and reducing operating costs.
Evaluation of effluent treatment efficiency by fractal analysis
Authors: Nafikova Elvira , Alexandrov Dmitry , Sidorova Arina , Aitkulova Azalia , Chuvashaeva Kamilla
Published: December 2023

The paper proposes a comparative evaluation method of effluent treatment efficiency for different effluent treatment facilities using fractal analysis. The smallest value of the fractal dimension of the field of compass-diagrams of the multiplicity of exceeding the maximum permissible concentration (hereinafter - MPC) by pollutants of effluent is taken as an integral criterion of the effluent purification degree. Pharmaceutical industry enterprises purification method of modeled values of treatment systems effluent indicators has been tested.
A study of the aerodynamic properties of cotton fiber in the confusor tube of a rotor spinning machine
Authors: Korabayev Sherzod , Bobojanov Husanhon , Soloxiddinov Jakhongir , Sadikov Muhammad , Yusupov Alijon , Mirzaboev Jamoliddin
Published: December 2023

In this article, the movement of fibers in the air channel and the rotor in the rotor spinning machine was studied. In the experimental work, the uniformity and stability of the velocity field of each channel for moving fibers in an aerodynamic device were checked. In this case, the airflow speed was changed from 5 m/s to 30 m/s. Also, differential equations of motion along the OX and OY axes were created taking into account the air resistance. When determining the movement of fibers in a conical channel, the total speed was divided into components, constant values were found, and general equations of motion were derived.
Application of Achimov deposits in the oil industry as a way of competitiveness increasing of Russia’s raw materials exports
Authors: Sentishcheva Elena , Parchomchuk Marina , Kuzmina Violetta , Golovin Alexey
Published: December 2023

The relevance of this study lies in the fact that the modern oil market is characterized by instability and high competition. Depletion of oil fields, deterioration of oil production equipment, price instability and political conflicts negatively affect Russia's position in the global energy market. The new economic conditions of 2021 are associated with a decrease in demand for oil and its products, high import dependence, conservation of wells to fulfil the OPEC++ deal, which will lead to a 3-10% drop in the market. It is necessary to apply new methods of oil production, one of which is the modern technology of Achimov oil fields development. The source materials were statistical data from the Center for Macroeconomic Analysis and Short-term Forecasting, the Ministry of Economic Development of Russia, the Analytical Center under the Government of the Russian Federation, world rating reports. The pandemic and self-isolation of 2020 led to the fact that the Russian oil sector lost 50-60% of revenue from hydrocarbon exports, more than 50% of its capitalization. The following fact is relevant for Russian oil companies: search for new markets (for example, Asia); application of innovative technologies to maintain the profitability of oil and gas production through the development of Achimovka oil deposits; development of small deposits and deposits with hard-to-recover reserves.
Gravel padding filters for combating sandblasting in wells
Authors: Saveleva N.N. , Shed S.N. , Savelev Y.V.
Published: December 2023

This paper presents an analysis the technology for creating an artificial gravel pack behind the casing in the near-wellbore part of the formation in producing oil and gas wells. Gravel-embedding filter is not only a special device installed in the well to clean the fluid extracted from the formation of sand and other foreign impurities, but also the use of gravel in conjunction with the filter in order to retain the formation sand at the site of its occurrence. Wells are equipped with gravel filters when completing them in formations represented by medium to fine grained and silty sands. The desiccant layouts of gravel stuffing filters on lightly cemented sandstones are presented in the work show high efficiency, as they prevent the removal of sand during the well operation. Creating an artificial gravel pack is an effective way to prevent sand from entering the well.
Ecofloristic analysis of natural algae population of reservoirs used as biological ponds of Bukhara
Authors: Jabborova Oisha , Mustafaeva Mamlakat
Published: December 2023

The article presents data on the comparative analysis of biological ponds, sewage treatment plants, which according to its climatic, hydrological and physical- chemical conditions of the environment is different from the other ponds. This article discusses the ecological- floral analysis of natural population of algal ponds used as biological ponds - reservoirs, clarifiers. Keywords: factor, pond, algae, flora, algoflora, saprobity, systematic, filtering, season.
Express risk assessment at engineering enterprises using neural networks
Authors: Novikov V. V. , Litvinov A.E. , Bajina T.P. , Yakunkina O.V.
Published: December 2023

Occupational safety risk management at mechanical engineering enterprises is a dynamic process of making and implementing decisions that minimize or reduce the risks of death, injury or illness of people in the performance of their duties.
Multifunctional modifier for regulating the properties of concrete mixtures
Authors: Kurbanbayeva Arzigul , Latha Munishamappa , Halmuminova Dilorom
Published: December 2023

The purpose of this work is the synthesis of new highmolecular surfactants polyalkylacrylates and the establishment of correlations between their colloidal chemical properties. Well-known methods for the synthesis and determination of the properties of surfactants were used. New high molecular surface-active substances (HMSAS) were obtained based on the reaction of polymer-analogous transformations. The resulting copolymers contain side hydrocarbon radicals of various lengths. Polyalkylacrylates were obtained by esterification with aliphatic alcohols (butyl, octyl, decyl) in a mixture of organic solvents and the presence of a catalyst, sulfuric acid. The surface activity and foaming ability of the obtained new HMSAS in aqueous solutions have been studied. The results obtained showed that with an increase in the length of the aliphatic hydrocarbon radical in the chain of macromolecules, the surface activity of polyalkylacrylates increases. An analysis of the results showed a good correlation between foaming and surface activity of the investigated HMSAS. Based on research, it was found that the stability of the foams is largely determined by the interaction of the HMSAS molecules in the monolayer.
Features of bridge superstructures modeling during the stress-strain state monitoring
Authors: Zasukhin Ilya , Ivanov Artem , Kuzmenkov Pavel , Polyakov Sergey , Chaplin Ivan
Published: December 2023

The complication of element design performance of artificial structures leads to the need for more detailed superstructure modeling, since simplified models don`t always allow taking into account deformation features of elements. In addition, during the building period, the actual stress-strain state of structures can be significantly influenced by factors that are difficult or impossible to account for at the design stage. Correct modeling of deformation of elements is one of the essential conditions for the prevention of emergencies during construction, maintenance or timely elimination of the consequences of such incidents with minimal losses. When performing this kind of work, attention should be focused on the most significant design parameters, which comprehensively reflect the nature of the structure operation. This will make it possible to effectively carry out control and promptly make appropriate adjustments to the building process, if it is necessary. The article describes an example of the simplified model modernization to more fully match its actual deformation and the experience of eliminating the consequences of emergency that arose during erection of unique bridge. Thus, the importance of adapting the computational model to the actual nature of the engineering design is confirmed.