bluuebunny/crossref_metadata_2025 huggingface dataset:
Organizational and technological aspects of industrial facility renovation
Authors: Zilberova Inna , Mailyan Vadim , Novoselova Irina , Petrov Konstantin
Published: December 2023

The refurbishment of industrial structures is a multifaceted, resource-intensive, and financially demanding undertaking. The process entails various challenges that necessitate thorough consideration during the design phase. Such an approach is pivotal in devising effective solutions for the reconstruction of industrial facilities, regardless of the operational conditions, and can lead to substantial reductions in construction costs. The ultimate objective of such renovation endeavors is to enhance production capacity and overall enterprise profitability, mitigate adverse environmental effects, and ameliorate the quality of urban living environments.
Current trends in the development of the national land market and issues of ensuring its sustainability and harmonization
Authors: Styazhkova Natalya , Baronin Sergey , Kulakov Kirill
Published: December 2023

The analysis focuses on current trends in the development of the national land market within the framework of sustainable development projects. It also addresses the challenges related to ensuring the market’s long-term sustainability and harmonization. This study examines the national land market and its ongoing structural changes in terms of both land ownership entities and categories, with an emphasis on sustainable and harmonious development. Attention is focused on the problematic aspects of stability, which become obvious when studying the current situation on the land market. These problems affect the economy, ecology, construction market, public and legal areas. The researchers also consider the unique characteristics of the land market that influence investment activity, emphasizing that these characteristics make the process of investing in the development of the land market complex and multifaceted. This process requires active advanced preparation for the harmonious development of the land market, which precedes sustainable construction. The paper also provides information about the system of state land registration in Russia, which is based on their categorization. This study focuses on the characteristics of the dynamic structural transformation of the national land market from 2005 to 2022, specifically examining the changes in ownership entities and categories. The analysis takes into account the market’s harmonization as a distinct commodity market with stringent requirements for sustainable development. In conclusion, the paper draws attention to the need for further research in the field of the land market, as a unique type of commodity market with special requirements for its sustainable and harmonious development.
Features of enhancing environmentally-oriented green construction at the regional level
Authors: Baronin Sergey , Guschina Ekaterina , Kulakov Kirill
Published: December 2023

The study focused on the challenges of establishing a national market for green housing construction in Russia, particularly highlighting the importance of regional-industry level management in its implementation. Using the example of the Penza region, problematic trends in the reproduction of green housing stock through long-term processes of sustainable housing construction are demonstrated. The object of the study is the national housing construction market in the process of its transformation into a green construction market with the priority of environmentally-oriented development and green certification. The purpose of the study is to assess the current state, problems and prospects for the development of green housing construction at the national and regional level based on environmentally-oriented development. The following main scientific results of the study are presented: a review of the modern concept of sustainable development of the construction industry; analysis of the problems of green, energy-efficient construction and eco-development in the Penza region; issues of strategic development of green housing construction; directions for improving the organizational and economic mechanisms of green construction in the context of the priority of environmental development. The study confirms the relevance of the priority transformation of housing markets into green housing construction markets.
Environmental aspects of the public examination of the construction of an Incineration complex
Authors: Kuzmina Margarita , Timshin Vadim , Kashintseva Valentina , Kunanbayeva Kymbat
Published: December 2023

The article examines the case of preparation for public expertise on a project for the construction of a waste incineration complex. Public expertise is a legal requirement and often leads to the cancellation of a project for which preparation resources have already been spent. The authors conducted a field study, which assists to develop a methodology for forming a favourable public opinion regarding the designed complex, as well as compose recommendations for the implementation of the program. An important element of the study is to identify the main concerns of the population regarding the project, as well as to identify the target audience, its channels for consuming information and the features of the implementation of information through these channels. The study will significantly reduce the risks of a ban on the project, as well as the resistance of the local population.
Reduction of transaction costs in the process of business informatization
Authors: Gurianova Elina , Gurianov Artem , Mechtcheriakova Svetlana , Khairullina Albina
Published: December 2023

The purpose of the article is to analyze the change of transaction costs in the context of business informatization. Business informatization is accompanied by the speed of information exchange and an increase in the volume of processed information. This changes the transaction costs associated with the information search, storage, transfer, and protection. The methodology of finding ways to reduce transaction costs includes several steps. First, it is necessary to classify the transaction costs that an organization faces. Second, to analyze the level of informatization of business. Third, to analyze the impact of information technologies on the performance of the company. Fourth, it is necessary to track the relationship between transaction costs and the level of business informatization. The use of this method has led to the following conclusions. Increasing the volume of processed information makes it urgent to use information technologies. The use of information technology allows to optimize information flows within and outside your organization. In addition, the introduction of information systems in the activities of organizations increases the reliability of information used for management decision-making. Increasing the level of reliability of information, in turn, reduces the transaction costs of the company, reducing the probability of errors and risks in the management of the organization. The results of the study make it possible to draw the following conclusions. The introduction of modern information technologies in the activities of organizations leads to reduced transaction costs due to increased reliability of the information database, as well as due to increased transparency of information flows of the organization. This allows to optimize the process of making management decisions in conditions of uncertainty, reduce the cost of doing business and eventually increase the efficiency of the organization.
The role of central banks in promoting Green finance
Authors: Tashtamirov Magomed
Published: December 2023

In an era of escalating environmental challenges, this research explores the complex role of central banks in the promotion of green finance. Employing a mixed-methods approach and focusing on case studies involving the European Central Bank, the People’s Bank of China, and the Federal Reserve, the study offers a nuanced understanding of the divergent strategies and challenges facing central banks. Despite political and technological hurdles, central banks have significant opportunities for financial innovation and global collaboration. Key policy implications include the need for holistic policy integration, enhanced transparency and disclosure protocols, and international cooperation. Recommendations for future research span longitudinal impact assessment, comparative financial instrument analysis, and exploring socio-economic variables. The study accentuates the transformative capacity of central banks in fostering a sustainable future, concluding that they have not only the capability but also the ethical obligation to lead this transition.
Green” bonds: historical aspects of implementation
Authors: Bisultanova Aza
Published: December 2023

The article provides an overview and chronological analysis of the development of green bonds from their inception to the present day. The article examines the first experiences with green bonds since the end of the 20th century and their evolution into an important instrument for financing sustainable and environmental projects. The authors focus on the key events, standards and regulations that have shaped the modern green bond market. The impact of green bonds on sustainable finance and the fight against climate change is also examined. The article explores the important role of green bonds in today’s financial industry and their impact on sustainable development. Green bonds are a financial instrument that aims to raise funds for projects and initiatives that promote environmental sustainability and combat climate change. The article analyses the basic principles and standards of green bonds, their effectiveness for investors and their contribution to sustainable finance. It also examines the global experience of the development of the green bond market and its importance in the context of global climate challenges. There is no doubt that green bonds play a key role in sustainable finance and contribute to achieving the Sustainable Development Goals.
Economy and environmental protection: the search for optimal solutions for balanced development and minimizing the negative impact on nature
Authors: Cherkina Vera , Zatsarinnaya Elena , Goncharova Oksana , Gavrilieva Nadezhda
Published: December 2023

The article discusses the features of the search for optimal solutions for balanced development and minimizing the negative impact on nature. According to the authors, economics and environmental protection should go hand in hand in the modern world, since modern eco-friendly technologies will allow entrepreneurs not only to preserve natural resources, but also to increase financial results and increase the level of business reputation, which will increase the degree of consumer loyalty to the products that such a company produces. Accordingly, it should be concluded that the prospects for interaction between ecology and the economy are extremely wide, their implementation will enable the modern economy to receive a significant incentive for growth and development.
Influence of the structure of construction organizations inventories on the balance sheet liquidity
Authors: Zaslavskaya Irina , Ovsyannikov Andrey , Belyanceva Oksana
Published: December 2023

The article addresses the issue of the impact of the structure of inventories on the liquidity and solvency of construction organizations. In 2019, the Ministry of Finance of the Russian Federation enacted new federal accounting standards FSBU, which expanded the composition of inventories and changed the approach to their valuation. The indicator “Inventories” in the balance sheet has a versatile structure, which depends on many factors, including the type of construction organization (customer, developer or contractor), the terms of construction contracts, the nature of the construction work performed and others. The task of analysis with regard to the structure of inventories is closely related to the task of improving the reliability of reporting and defining the liquidity and level of solvency of construction organizations. The article examines the structure of inventories in construction organizations of different types and their reflection in accounting, and reveals the influence of factors on different groups of inventories, which constitute a significant share in the total structure of inventories, as well as analyzes the main factors affecting the structure of inventories and considers the problems of construction organizations in reflecting the real value of inventories in the balance sheet. In addition, for preventive diagnostics and adjustment of reporting items, recommendations are given on how to reflect the structure of inventories in additional analytical internal supporting reporting.
Release of products into circulation on the foreign market, taking into account compliance with the mandatory requirements of the country of destination
Authors: Abyzov Valery , Deniskin Yury , Korchagina Julia , Solovyeva Elena
Published: December 2023

The task of developing a unified methodology for ensuring compliance with the mandatory requirements of the country of destination when releasing products into circulation to the target foreign market has been formulated. The results of the preliminary study show that the use of invariant methods and approaches to determine the mandatory requirements of the country of destination will optimize the time and cost of conformity assessment, monitor and update mandatory requirements. as well as work to participate in the formation of these requirements, including the use of artificial intelligence technology.
Transdisciplinary methods in socio-economic and environmental research
Authors: Ivashova Valentine , Skabayeva Gulmira , Platonova Agafya , Kuperbayeva Aigul , Sambetkulova Nazira
Published: December 2023

The article presents a theoretical overview characterizing the research potential of transdisciplinary methods. The empirical part was conducted in the South of Russia (Stavropol Krai) in July 2023; it summarizes the practices of using transdisciplinary methods in the analysis of socio-economic and environmental processes. The professional community of environmentalists of Stavropol Krai was involved in the development of strategic vectors of interaction with university education to solve a common task –the training of highly qualified specialists in demand by production. In the course of the study we assessed the involvement of the professional community of ecologists in the processes of interaction with university teachers; the quality of training of graduates of environmental educational programs of higher education; we identified the practiced and promising types of interaction between the professional community of ecologists and the university. The research shows the importance of universal professional competencies for the successful work of a graduate of environmental educational programs. The data obtained provide an understanding of the importance of new research strategies using transdisciplinary approaches in the analysis of socio-economic and environmental processes.
Mathematical-statistical analysis of experimental work on the use of modeling programs for future engineers
Authors: Kahramon Olimov
Published: December 2023

Through this article, you can get information about the methods implemented on the basis of training using programs for modeling the teaching process in the general professional subject “Technical applications on the basis of programming languages” and see the statistical analytical results of the effectiveness of the experimental tests conducted in order to determine the effectiveness of training using the programs.
The impact of Edtech: strengths and opportunities
Authors: Shustova Irina , Polevaya Elena , Ivanov Alexander
Published: December 2023

The introduction of advanced digital technologies and digital transformation is fundamental for the economic growth and development of companies, states and society. Today, the traditional model of education is also undergoing changes as a result of the introduction of new digital technologies, digital methods and approaches to learning. The relevance of this study is due to the fact that digital transformation in the field of education is the most prominent example of qualitative transformation of life activities. The outcome of this digital transformation is the formation of a new sector of the digital economy called EdTech (Education Technology). The purpose of this study is to analyse the global EdTech market and to examine its strengths and development prospects. Research methods: theoretical approach, analysis, study of scientific literature, specification of conclusions, method of thinking, and visual interpretation of the results obtained. As part of this research, the authors have defined EdTech; examined the application of digital technologies in EdTech, and studied the impact of digital technologies on the development of EdTech. The authors also investigated the dynamics of venture capital investment in EdTech; researched EdTech leaders and identified key EdTech sectors.
Christian temples of the Nakh peoples as manifestation of religious contaminations
Authors: Pishchulina Victoria , Rodichev Anton
Published: December 2023

The article reveals that the general principle of localization of temples and sacred complexes on the territory of the Nakhs’ residence corresponded to the radial-route model of space development: the most revered temple was necessarily located in the center of the ethnic community, temples and cult complexes existed in every patronymic community and patronymic family. Ensembleness is one of the leading characteristics of the temple architecture of this period. The hierarchical principle has received the greatest development. It is revealed that the identity of the variants of “folk” church building is determined to a greater extent by the nature of the introduction of traditional culture features into it, however, in this case, its formation was largely influenced by the Christian cultures of various directions existing in the specified territory (Orthodoxy, Catholicism and Nestorianism), as well as Islam. The significant influence of Nestorian Christian culture on the process of formation of the features of the church building of the Sunny Valley strip of Nestorian Christian culture is indicated.
Perspectives of green infrastructure in the city’s color design-code
Authors: Feofanova Sofiia , Zaykova Elena
Published: December 2023

Green infrastructure can influence the coding of urban space. The second stage of urban planning design is based on technological solutions that make it possible to obtain an urban biotope. That is, a biotope with imitation of natural processes and colour implementation. The colour appears from the history of the place, and carries social-semiotic features into the renewed urban environment. Stormwater is also used in urban biotope, passes through the territory, is preserved and diverted to a man-made biotope with a conceptual load, especially in the architectural environment. Thus, an interdisciplinary approach is used, combining architecture, city planning, urban environment and landscape design.
Effect of arc element row arrangement on separator efficiency
Authors: Vu Linh Nguyen , Khamitova Dinara , Kuznetsov Maxim , Dubkova Nailya
Published: December 2023

Dust emission gas cleaning is a crucial factor for many industries. The paper proposes a separator with the arc-shaped elements to clean dusty gas from solid particles. The study aims to examine how the distance between rows of arc-shaped elements affects separator efficiency and pressure drop, using numerical methods. In simulations, the inlet velocity of the gas flow varied from 0.5 to 5 m/s and the particle size was 10 to 170 μm. It was found that the change in the distance between the rows of the arc elements in the device leads to the formation of different streams. The results show that increasing the distance between the rows of the arc results in a decrease in the separator efficiency, since the particles during separation from the dusty gas due to centrifugal forces fly into the space between the elements, where they are inversed by the flow again. In this case, the pressure drop decreases. The maximum efficiency of particle separation by the developed device (95.4%) is achieved at a distance between rows of arc elements of 0.75. Pressure loss in the separator ranges from 16 to 1862 Pa at an inlet gas velocity of 0.5 to 5 m/s.
Virtual testing ground for the development of control systems for unmanned vehicles in agriculture
Authors: Svyatov Kirill , Rubtcov Ivan , Ponomarev Aleksey
Published: December 2023

The article describes the technology for deploying and programmatically setting up a virtual test environment for testing algorithms for ground-based agricultural unmanned vehicles. The fields2cover library is used to plan the path, and the Webots simulator integrated with the robot operating system is used as the basis for the test suite. The main task to be solved is to match the coordinate system of the path through the field and the coordinate system of the virtual autonomous vehicle. It also describes the process of creating digital maps using OpenSrtreetMap, converting them into the necessary formats for generating a route in the fields2cover library, and setting up a simulator based on Webots. The work is relevant for educational purposes and is of interest to developers involved in the design of autonomous vehicles.
Geoinformation modeling of socio-ecological safety of rural areas on the example of settlements of the Belgorod region
Authors: Yeprintsev Sergey , Kurolap Semen , Klepikov Oleg , Budarina Victoria , Ignatenko Ignat
Published: December 2023

In the course of the study, geoinformation resources were created for the rural areas of the Belgorod region. The created GIS consists of a system of hierarchically subordinate sections of rural territories of the Belgorod region - agrolandscapes of Strigunovsky (Borisovsky district), as well as Obukhovsky (Starooskolsky urban district) and Dolgopolyansky (Starooskolsky district) rural settlements. The results of ecological and geochemical studies were used as databases and thematic cartographic tools reflecting the natural resource potential, socio-economic and ecological-hygienic situation. The study of the spatial and temporal characteristics of the degree of anthropogenic pressure in rural areas of the Belgorod region on the example of Strigunovsky (Borisovsky district), Obukhovsky (Starooskolsky urban district) and Dolgopolyansky (Starooskolsky district) rural settlements, as well as adjacent agricultural landscapes using Earth remote sensing materials, made it possible to differentiate studied territories. 4 zones are identified - high anthropogenic load (residential and outbuildings of a rural settlement), medium anthropogenic load (agricultural land and other anthropogenic objects), natural frame (territories occupied by green vegetation), water bodies.
On comparison of methods for quantitative chemical analysis of atmospheric air
Authors: Volkodaeva Marina , Volodina Yana , Timin Sergei
Published: December 2023

In connection with the increasing anthropogenic load, it is necessary to control the content of various impurities in the atmospheric air. One of these compounds is formaldehyde, which has carcinogenic and mutagenic properties. To measure the concentration of this substance, various methods are used - chromatographic, spectrophotometric, fluorescent. As an alternative to these methods, the authors propose the use of photoacoustic detection. According to the results of comparative tests, this method should be considered suitable for use in monitoring atmospheric air.
Impact of water scarcity on socio-economic development
Authors: Israilova Elima , Voronina Alexandra , Shatila Khodor
Published: December 2023

The study delves into the intricate relationships between water scarcity, socio-economic development, and key contributing factors. Through a quantitative analysis of data encompassing Crop Yields, Rural Livelihoods, Labor Migration, and Socio-economic Development, the research seeks to unravel the multidimensional impacts of water scarcity on various facets of societal progress. The findings reveal that while Crop Yields exhibit weak positive correlations with Rural Livelihoods and Socio-economic Development, their influence is modest. Rural Livelihoods emerge as a significant driver, displaying strong positive correlations with both Labor Migration and Socio-economic Development. Labor Migration, in turn, exhibits connections with Rural Livelihoods and a minor relationship with Socio-economic Development. Socio-economic Development maintains weak positive correlations with Crop Yields and Labor Migration. The outcomes underscore the pivotal role of Rural Livelihoods in fostering better Socio-economic Development outcomes, shedding light on the intricate dynamics that shape the complex interplay between water scarcity and societal advancement. These insights offer valuable guidance for crafting strategies that promote sustainable development and underscore the importance of enhancing livelihoods in addressing the multifaceted challenges posed by water scarcity.
Rational data selection from heterogeneous information space: problem statement
Authors: Glinskiy Vladimir , Freidina Elizaveta , Serga Lyudmila , Zaykov Kirill
Published: December 2023

The paper considers the problem of providing rational data selection from heterogeneous information space for adaptive-heuristic intelligence embedded in the mechanism of robust management of socio-economic systems. The relevance of solving the presented problem is determined by the need to adapt the work of the socio-economic system to the paradigm of modernity -sustainable functioning and development in conditions of accelerated changes. Systems move from complex to complex-adaptive, diffuse forms with the development of the ability to self-regulate like living, biological systems. To survive and develop, they try to make flexible, anticipatory adaptations within the limits of acceptable deviations of physiological parameters from some parameters -constants of health, which represent the conditions of maintaining homeostasis. The prototype is the automatic robust control of closed systems, in which the leading parameters are given a certain degree of freedom and the limit of their permissible changes is set. The effectiveness of such control strongly depends on the reliability of the data -facts entered the information granules of adaptive and robust homeostasis. We propose a technology for obtaining reliable information about the state of the studied objects for robust management based on the use of rational choice methods.
Algorithm for joint optimization of machine learning for upgrading a finite difference model
Authors: Ivakhnenko Natalya , Badekin Maxim
Published: December 2023

Modernization of the finite element model is currently the basic tool for refining the numerical solution of modeling problems by adjusting the numerical response to the observed empirical behavior of the system. Recently, the modification of the model in some cases is carried out using the maximum likelihood method. Following this approach, the update problem can be transformed into a multiobjective optimization problem. Due to the non-trivial non-linear behavior of the desired objective functions, metaheuristic optimization algorithms are usually used to solve such an optimization problem. However, despite the fact that recently this method has proven itself quite well, nevertheless, there are two significant drawbacks that must be eliminated for the practical application of this method. Among which are the length of time spent on the calculation of the problem and the uncertainty associated with choosing the most optimal updated model among all Pareto optimal solutions. To circumvent these limitations, this paper proposes to apply a new joint algorithm that takes advantage of the joint relationship between two optimization algorithms, a machine learning method, and a statistical toolkit. As a result of the study, two main advantages of the newly proposed algorithm were revealed: it leads to a clear reduction in simulation time; and also allows you to make a reliable choice of the best updated model.
Creation of cross-platform toolkit and methods of programming trusted CNC systems
Authors: Martinova Liliya , Fokin Nikolay
Published: December 2023

The developed cross-platform toolkit is presented and the methodology for its use for programming trusted CNC systems is described. The use of canned cycles in a trusted CNC system allows to quickly and flexibly change production processes, in particular when changing the range of products or if it is necessary to replace equipment with a changing the CNC system. Canned cycles built on cross-platform toolkit can be adapted and customized to meet new requirements and changes in the production process, which is critical to quickly respond to changing market conditions and ensure timely order fulfillment. The cross-platform toolkit presented in the article implement logical relationships between the variables that determine the geometry of the processed elements and the processing strategy embedded in canned cycles and logical control commands, which is aimed at ensuring the trust of the CNC system. The architectural model of the toolkit provides for the formation of universal templates for developing macroprograms in a high-level language and multi-level interaction of program modules with a gallery of macroprograms. The rules for structuring and arrangement of macroprograms in the CNC system are described.
Designing an information system to automate service management at the enterprise
Authors: Orlov Vasiliy , Kukartsev Vladislav , Suprun Elena , Gek Danil , Ageev Daniel
Published: December 2023

In this paper we consider the development of an automated information system for a coffee shop that meets the current standards and needs of this business. Emphasis is placed on both hardware infrastructure and content structure. This AIS system provides all the necessary functionality for a coffee shop to successfully run its business, including convenient menu search, online ordering and payment. In addition, the application helps to reduce the workload of the staff, as many tasks that were previously performed by employees can now be automated and performed by the system being developed.
The “complex probabilities” balance principle for non-Markov processes modeling
Authors: Gusenitsa Yaroslav
Published: December 2023

This paper presents the principle of “complex probabilities” balance, based on the description of the stochastic process not in the time, but in the complex domain, which allows developing models of non-stationary queuing systems with arbitrary probabilities distributions of the requests and their servicing time, taking into account random or deterministic time delays. A system of balance equations in the complex domain was compiled and solved using Laplace images. Performed an inverse Laplace transform to move from images to probabilities in the time domain. Presented models for acyclic and cyclic stochastic processes with arbitrary distributions of time points between incoming requests and their service. Given calculation examples. Recommendations for the further application of the principle of balance of “complex probabilities” are given.
The analytical dependence of the resistance force to digging with a bulldozer blade on the main influencing factors
Authors: Khankelov T.K. , Sarmonov A.Kh. , Kadirov A.G.
Published: December 2023

The criteria for the similarity of the process of digging soil with a bulldozer blade are determined based on the use of the principles of the theory of similarity and modeling. When determining the similarity criteria, a rheological model of the process of interaction of the bulldozer blade with soil and the method of dimensional analysis were used. The processing of experimental data obtained with large-scale physical models in a criterion form made it possible to significantly reduce the time and material costs for conducting experiments. The criterion equation is valid for any change in the parameters included in the dependence that determines the force of digging the soil with a bulldozer blade. The main limitation is compliance with the equality of similarity criteria for the model and the original.
Increasing the wear resistance of highly loaded parts such as bodies of rotation by the method of vibration rolling
Authors: Leonidov P.V.
Published: December 2023

The article analyses the increase of durability of operating surfaces of highly loaded machine parts. The advantages of surfaces with regular microgeometry, obtained by vibration rolling method, compared with usual rough surfaces for improvement of operational properties are shown. Tests of samples and control samples from steel 20 and cast iron samples with control samples from steel processed by grinding and vibration rolling are carried out. The results of research on increasing the wear resistance of the surfaces of details with regular microgeometry are given. Wear mechanisms arising at fretting of vibro-rolled samples in comparison with the process of grinding are established.
Integration of the scattering chamber of the NUMEN experiment
Authors: Sartirana Diego , Calvo Daniela , Agodi Clementina , Cappuzzello Francesco , Cavallaro Manuela , Ferraresi Carlo , Brandão de Oliveira Jose Roberto , Russo Antonio Domenico ,   for NUMEN collaboration
Published: December 2023

The NUMEN experiment points to measure Double Charge Exchange reaction (DCE) cross sections with heavy-ion beams interacting with specific isotopes of interest for Neutrinoless Double Beta Decay process (0νββ). To achieve this, NUMEN requires a complete upgrade to MAGNEX spectrometer in INFN-LNS and a high intensity ion beam. This work focuses on the design of a new scattering chamber where the ion beam will interact with the target precisely positioned by an automatic system. The target will be cooled by a custom system based on HOPG and a cryo-cooler. The fist integration of the chamber with all its components has been done at INFN section of Turin to check compliance with the requirements and to study the procedures for the target replacement. Some results of this tests will be presented.
Recent results from the DESPEC campaign at GSI
Authors: Benzoni Giovanna ,   for the HISPEC-DESPEC collaboration
Published: December 2023

HISPEC-DESPEC is a collaboration, part of NUSTAR, aiming at studying the structure of nuclei produced by projectile fragmentation reactions exploiting the beams delivered by the accelerator system at present and future facilities GSI and FAIR. In the early stages of the experimental activity at FAIR Phase-0, started in 2020, the collaboration focused the attention on studies following the decay of long-living isomeric states and β-decays with lifetimes in the millisecond-to-second range. A description of the set-up and of first results obtained in the experimental campaigns covering years 2020-2022 are the subject of this talk.
R-Matrix study of the β+decay of 8B to the highly excited states of 8Be
Authors: Fernandez Ruiz D. , Viñals S. , Tengblad O. , Borge M.J.G. , Fynbo H.O.U. , Riisager K. , Nácher E.
Published: December 2023

Experiment IS633 was conducted at the ISOLDE facility with the aim of studying the 2+ isospin doublet of 8Be, the only expected case of nearly equal isospin configuration mixing. The doublet was previously probed by reaction studies where the feeding does not depend on the isospin. Beta decay studies are sensitive to the isospin composition of the doublet since the Fermi and Gamow-Teller strengths are heavily dependent of isospin. In this experiment the doublet was probed through the EC/β+ feeding from 8B. A four-particle telescope setup with a C-foil in the centre was employed to stop the 8B beam, the implanted nucleus would decay and populate the doublet that breaks up in two alpha particles that are detected. The statistics achieved in this experiment were two orders of magnitude higher than that of any previous experiment, enabling the first experimental observation of both contributions to the doublet.
Universal Models for Heavy-Ion Fusion Cross Section Above-Barrier
Authors: Lombardo Ivano , Dell’Aquila Daniele , Gnoffo Brunilde , Redigolo Luigi , Porto Francesco , Russo Marco
Published: December 2023

The paper discusses a recent re-investigation of a large body of heavy-ion fusion cross section data with the aim of deriving a simple phenomenological model able to describe data from the Coulomb barrier up to the onset of nuclear multifragmentation. To this end, we adopted two complementary approaches: a first universal phenomenological model was derived exploiting a novel artificial intelligence tool for the formal modelling of large datasets. This tool is capable of advanced feature selection and is ideal to drive the discovery process even using traditional methods. A second phenomenological model was derived using a sum-of-difference approach and achieved an unprecedented accuracy in describing above-barrier fusion excitation functions data. Future perspectives and opportunities arising from the present models are also discussed in the text.
Core-valence absorption in breakup and stripping reactions and its isospin dependence
Authors: Gómez-Ramos Mario , Gómez-Camacho Joaquín , Moro Muñoz Antonio Matías
Published: December 2023

In this work, the effect of nucleon-core absorption on nucleon removal reaction is explored through the use of complex nucleon-core interactions. Results are presented for exclusive breakup reactions, where absorption is explored through the use of a binormal basis in the continuum-discretized coupled-channel method, and for stripping nucleon knockout reactions, where absorption is considered through the application of an effective density in the eikonal approximation. Both methods show an increased effect of nucleon-core absorption when removing a deeply-bound nucleon, which leads to smaller cross sections, a reduction that is larger than in the weakly-bound case.
Proton single-particle energy gaps in Sc isotopes
Authors: kumar Pawan , Martínez-Pinedo Gabriel , Mancino Riccardo
Published: December 2023

Variation in the proton single-particle energy gaps is investigated within the framework of nuclear shell model. The change is identified to originate mainly from the central force of the proton-neutron interaction. The relationship between the nuclear state and the single-particle energy gap is discussed. The first 3/2− state of 55Sc reveals the fragile character of N = 34 semi-magic shell gap.
Sr isotopes: The interplay between shape coexistence and quantum phase transitions
Authors: Maya-Barbecho E. , García-Ramos J.E.
Published: December 2023

In this contribution we study the even-even Sr isotopes considering the influence of particle-hole intruder states. We find that the rapid onset of deformation at A = 98 and onwards can be explained by the crossing of regular and intruder states. We compare the systematics of Sr with the ones of Zr, Pt, and Hg nuclei.
Quarteting in deformed N = Z nuclei
Authors: Sambataro M. , Sandulescu N.
Published: December 2023

We describe deformed N = Z nuclei in a formalism of α-like quartets. Quartets are constructed variationally by resorting to the use of proper intrinsic states. Various types of intrinsic states are introduced which generate different sets of quartets for a given nucleus. Energy spectra are generated via configurationiteraction calculations in the spaces built with these quartets. The approach is applied to 24Mg and 28Si in the sd shell and to 48Cr in the p f shell. In all cases a good description of the low-lying spectra is achieved. As a peculiarity of the approach, a close correspondence is observed between the various sets of quartets employed and the occurrence of well defined band-like structures in the spectra of the systems under study.
s-process Nuclear Reaction Rates
Authors: Rapagnani David ,   for the LUNA collaboration
Published: December 2023

In stars the 13C(α, n)16O and 22Ne(α, n)25Mg reactions are the two main sources of neutrons for the so-called slow neutron capture process (s-process), which is one of the main mechanisms for the stellar synthesis of heavy elements. About 13C(α, n)16O, in despite of many efforts in measuring its cross section at the lower energies, only high uncertainty data above the s-process Gamow window (150 keV < Ecm < 230 keV) were available, due mostly to the difficulties on suppress the natural background. Indeed, only recently the LUNA collaboration performed high precision underground measurements of the reaction cross section inside the Gamow window, improving the accuracy of its extrapolation at the lower energies. Again due to natural background, only upper limits for the 22Ne(α, n)25Mg reaction cross section are currently known in the s-process Gamow window (450 keV < Ecm < 750 keV). For this, the ERC founded project SHADES (Unina/INFN) aims to perform high precision and high sensitivity measurements of the 22Ne(α, n)25Mg reaction cross section down to the neutron threshold. A sensitivity improvement of at least two orders of magnitude over the state of the art is expected thanks to the low natural background environment of the INFN-LNGS laboratory in Italy, the high beam current of the new LUNAMV accelerator and the Beam Induced Background events suppression performed by SHADES hybrid detectors array. In this paper I will present the LUNA efforts to estimate nuclear reaction rates for 13C(α, n)16O, with a focus on the R-Matrix analysis performed with the code AZURE2 to extrapolate nuclear reaction rates at stellar energies and the estimate of their uncertainty through Monte Carlo methods. I will also present an overview of the SHADES project to measure 22Ne(α, n)25Mg in the Gamow window and the first results on the setup commissioning.
Constraining Neutron-Star Matter — Combination of heavy-ion experiments and multi-messenger astronomy
Authors: Le Fèvre Arnaud A.
Published: December 2023

Describing supernova explosions or neutron-star collisions requires a deep understanding of properties of nuclear matter at supra-saturation densities, and extreme neutron over proton asymmetries. So far, our knowledge about dense matter provided by astrophysical observations in the cores of neutron stars remains limited. However, dense nuclear matter is also probed in terrestrial heavy-ion collision (HIC) experiments. We demonstrate how, within a novel approach, using Bayesian inference, combining data from astrophysical multi-messenger observations of neutron stars and from HICs at relativistic energies, one can improve our understanding of dense nuclear matter. The inclusion of HIC data probing the nuclear matter equation-of-state (EoS) at supra-saturation density has the effect of increasing the predicted pressure in the core of neutron stars relative to previous analyses, and shifts the neutron-star radii expectation towards larger values, in accordance with recent observations by the Neutron Star Interior Composition Explorer mission. More remarkable is that, though the sources and methods of observation are orthogonal, the constraints from HIC experiments and multimessenger observations are consistent with each other. It shows that both methods can be complementary at intermediate densities, and strengthen each other. Another conclusion is that in order to be even more constraining, the constraint of the EoS of asymmetric nuclear matter by HIC methods should be improved above twice saturation density, which should be feasible with future experiments with enhanced precision and higher bombarding energy.
Constraining the QCD phase diagram
Authors: Philipsen Owe
Published: December 2023

Lattice QCD and functional methods are making significant progress in constraining the QCD phase diagram. As an important milestone, the chiral phase transition with massless u, d-quarks at zero density is now understood to be of second order for all strange quark masses, and a smooth crossover as soon as mu,d, ≠ 0. Together with information on fluctuations and refined reweighted simulations, this bounds a possible critical point to be at µB/T ≲3. On the other hand, an approximately chiral-spin symmetric temperature window has been discovered above the chiral crossover, Tch<T ≳3Tch, with distinct correlator multiplet patterns and a pion spectral function suggesting resonance-like degrees of freedom, which dissolve graduallly with temperature.
The role of deformation in the 17C structure and its influence in transfer and breakup reactions
Authors: Punta P. , Lay J.A. , Moro A.M.
Published: December 2023

17C structure is studied within a two-body model, a weakly bound neutron moving in a deformed potential generated by the core. A semi-microscopic method has been used to generate the deformed valencecore potential. The method consists of the convolution of a realistic nucleon-nucleon (NN) interaction with the core transition densities, which are obtained by antisymetrized molecular dynamics (AMD). The results highlight the important role of deformation for this nucleus and can be easily applied to reaction calculations.
Few-Body Reactions with the Trojan Horse Method
Authors: Rapisarda G.G. , Spartá R. , Tumino A. ,   for ASFIN collaboration
Published: December 2023

The Trojan Horse method (THM) is a well-established experimental technique to measure nuclear reactions of astrophysical interest avoiding the suppression of the Coulomb barrier affecting experimental direct measurements. In this paper it will describe some of the THM studies involving few-body system of interest for both nuclear physics and nuclear astrophysics, such as the sub-Coulomb proton-proton elastic scattering and the deuteron-deuteron fusion at energies of interest for primordial nucleosynthesis. Moreover, the role of the intercluster motion in nuclei used for THM measurement will be highlight for the discussed physics cases.
Study on high-speed water entry process of non-rotating vehicles
Authors: YANG Kaixin , LUO Kai , HUANG Chuang , LI Daijin , WANG Qian , GU Jianxiao , LI Yongfeng
Published: December 2023

The non-rotating trans-media vehicle can better adapt to the hypersonic flight conditions, but new problems in the hydrodynamic characteristics and motion stability arise during the water entry process. With the VOF multiphase model, Realizable k-ε turbulence model, and Schnerr-Sauer cavitation model, this paper establishes a simulation method of coupling the movement of non-roating body into water with multiphase flow fields based on overset grid technology, and the accuracy of the established model is verified. The simulation calculation of the oblique water entry process of the vehicle with different ratio of short axis to long axis in cross section is carried out. And the results show that although the ratio of short axis to long axis in cross section does not change the cavitation morphology, it affects the hydrodynamic and kinematic characteristics of the vehicle by influencing the relative position of the cavitation. As the ratio of short axis to long axis decreases, the motion stability of the vehicle increases gradually. However, if the ratio of short axis to long axis is too small, the drag reduction effect will be weakened, and the structure will suffer a bigger load.