bluuebunny/crossref_metadata_2025 huggingface dataset:
A quantitative explanation of the cyclotron-line variation in accreting magnetic neutron stars of super-critical luminosity
Authors: Loudas Nick , Kylafis Nikolaos D. , Trümper Joachim
Published: June 2024

Context. Magnetic neutron stars (NSs) often exhibit a cyclotron resonant scattering feature (CRSF) in their X-ray spectra. Cyclotron lines are believed to be generated in the radiative shock in the accretion column. High-luminosity NSs show a smooth anti-correlation between the cyclotron-line centroid (ECRSF) and X-ray luminosity (LX).

Aims. It has been pointed out that the observed ECRSF − LX smooth anti-correlation in high-luminosity NSs is in tension with the theoretically predicted one, if the radiative shock is the site of cyclotron-line formation. The shock height increases approximately linearly with luminosity, while the dipolar magnetic field drops as the cubic power of distance, thereby implying that the cyclotron-line energy ought to decrease significantly when the luminosity increases by, say, an order of magnitude, which is contrary to observations. Since there is no other candidate site for the cyclotron-line formation, we re-examine the predicted rate of change of the cyclotron-line energy with luminosity at the radiative shock, taking a closer look at the Physics involved.

Methods. We developed a purely analytical model describing the overall dependence of the observed cyclotron energy centroid on the shock front’s height, including both the relativistic boosting and the gravitational redshift effects in our considerations. The relativistic boosting effect is due to the mildly relativistic motion of the accreting plasma upstream with respect to the shock’s reference frame.

Reults. We find that the cyclotron-line energy varies with (a) the shock height due to the dipolar magnetic field, (b) the Doppler boosting between the shock and bulk-motion frames, and (c) the gravitational redshift. We show that the relativistic effects noticeably weaken the predicted ECRSF − LX anti-correlation. We use our model to fit the data of the X-ray source V0332+53 that exhibits a weak negative correlation and demonstrate that the model fits the data impressively well, thereby alleviating the tension between observations and theory.

Conclusions. The reported weak anti-correlation between cyclotron-line centroid and X-ray luminosity in the supercritical accretion regime may be explained by the combination of the variation of the magnetic-field strength along the accretion column, the effect of Doppler boosting, and the gravitational redshift. As a result of these effects, the actual magnetic field on the surface of the neutron star may be a factor of ∼2 larger than the naively inferred value from the observed CRSF.
Expected evolution of the binary system PTF J2238+743015.1
Authors: Piersanti L. , Yungelson L. R. , Bravo E.
Published: June 2024

Context. Binary systems harboring a low-mass CO WD and a He-rich donor are considered to be the possible progenitors of explosive events via He detonation, producing low-luminosity thermonuclear supernovae with a peculiar nucleosynthetic pattern. Recently, the binary system PTF J223857.11+743015.1 was proposed as a candidate for this kind of stars.

Aims. We investigate the evolution of the PTF J223857.11+743015.1 system, which is composed of a 0.75 M⊙ CO WD and a 0.390 M⊙ subdwarf. We consider the rotation of the WD component.

Methods. Using the FuNS code, we computed the evolution of the two stars simultaneously, taking into account the possible evolution of the orbital parameters, as determined by mass transfer between the components and by mass ejection from the system during episodes of Roche lobe overflow. We consider that the WD gains angular momentum due to accretion and we followed the evolution of the angular velocity profile as determined by angular momentum transport via convection and rotation-induced instabilities.

Results. As the donor H-rich envelope is transferred, the WD experiences recurrent very strong H-flashes triggering Roche lobe overflow episodes during which the entirety of the accreted matter is lost from the system. Due to mixing of chemicals by rotation-induced instabilities during the accretion phase, H-flashes occur inside the original WD. Hence, pulse by pulse, the mass of the accretor is reduced down to 0.7453 M⊙. Afterwards, when He-rich matter is transferred, He detonation does not occur in the rotating WD, which undergoes six very strong He-flashes and subsequent mass-loss episodes. Also in this case, due to rotation-induced mixing of the accreted layers with the underlying core, the WD is eroded. Later, as the mass-transfer rate from the donor decreases, a massive He buffer is piled up onto the accretor, which ends its life as a cooling WD.

Conclusions. The binary system PTF J2238+743015.1 and all other binary systems with components of similar masses and similar orbital parameters are not good candidates as thermonuclear explosion progenitors.
Relationship between TIGRE solar S-index and USET Ca II K full disk images
Authors: Vanden Broeck G. , Bechet S. , Clette F. , Rauw G. , Schröder K.-P. , Mittag M.
Published: June 2024

Context. Full disk observations of the solar chromosphere in the Ca II K line represent a valuable dataset for studies of solar magnetic activity. The well known S-index is widely used to investigate the magnetic activity of stars, however, its connection to the coverage of stellar magnetic structure is still poorly understood.

Aims. We use the archives of full disk Ca II K images taken by the Royal Observatory of Belgium with the Uccle Solar Equatorial Table (USET) to derive the area fraction of the brightest chromospheric structures over the last decade. These data have allowed us to study the end of the solar cycle 24 and the beginning of the solar cycle 25. Our aim is to compare this dataset with the solar S-index from the Telescopio Internacional de Guanajuato Robotico Espectroscopico (TIGRE) lunar spectroscopy to analyze the relationship between a disk coverage index and an integrated spectrum. We also searched for periodic modulations in our two datasets to detect the solar rotation period.

Methods. We used more than 2700 days of observations since the beginning of the Ca II K observations with USET in July 2012. We performed a calibration of the images (re-centering and center-to-limb variation correction). The brightest regions of the solar surface (plages and enhanced network) were then segmented using an algorithm based on an intensity threshold. We computed the area fraction over the solar disk and compared it with the S-index from TIGRE. For the detection of periodic modulations, we applied a discrete Fourier power spectrum method to both datasets.

Results. A tight linear relationship was found between the USET area fraction and the TIGRE S-index, with an improved correlation obtained in the low-activity regime by considering the enhanced network. In both time series, we detected the modulation caused by the rotation of bright structures on the solar disk. However, this detection is constrained in the case of TIGRE due to its observation strategy.

Conclusions. We studied the correlation between the disk coverage with chromospheric structures and the variability of the S-index on an overlapping period of ten years. We concluded that the disk coverage index is a good proxy for the S-index and will be useful in future studies of the magnetic activity of solar-type stars. The USET area fraction dataset is most appropriate for evaluating the solar rotation period and will be used in future works to analyze the impact of the inclination of the stellar rotation axis on the detectability of such periodic modulations in solar-type stars.
Tracing the evolutionary pathways of dust and cold gas in high-z quiescent galaxies with SIMBA
Authors: Lorenzon G. , Donevski D. , Lisiecki K. , Lovell C. , Romano M. , Narayanan D. , Davé R. , Man A. , Whitaker K. E. , Nanni A. , Long A. , Lee M. M. , Junais  , Małek K. , Rodighiero G. , Li Q.
Published: June 2024

Recent discoveries of copious amounts of dust in quiescent galaxies (QGs) at high redshifts (z ≳ 1 − 2) challenge the conventional view that these objects have a negligible interstellar medium (ISM) in proportion to their stellar mass. We made use of the SIMBA hydrodynamic cosmological simulation to explore how dust and cold gas evolve in QGs and are linked to the quenching processes affecting them. We applied a novel method for tracking the changes in the ISM dust abundance across the evolutionary history of QGs identified at 0 < z ≲ 2 in both cluster and field environments. The QGs transition from a diversity of quenching pathways, both rapidly and slowly, and they exhibit a wide range of times that elapsed between the quenching event and cold gas removal (from ∼650 Myr to ∼8 Gyr). Contrary to some claims, we find that quenching modes attributed to the feedback from active galactic nuclei (AGNs) do not affect dust and cold gas within the same timescales. Remarkably, QGs may replenish their dust content in the quenched phase primarily due to internal processes and marginally by external factors such as minor mergers. Prolonged grain growth on gas-phase metals appears to be the key mechanism for dust re-formation, which is effective within ∼100 Myr after the quenching event and rapidly increases the dust-to-gas mass ratio in QGs above the standard values (δDGR ≳ 1/100). Consequently, despite heavily depleted cold gas reservoirs, roughly half of QGs maintain little evolution of their ISM dust with stellar age within the first 2 Gyr following the quenching. Overall, we predict that relatively dusty QGs (Mdust/M⋆ ≳ 10−3 − 10−4) arise from both fast and slow quenchers, and they are prevalent in quenched systems of intermediate and low stellar masses (9 < log(M⋆/M⊙) < 10.5). This strong prediction poses an immediate quest for observational synergy between, for example, the James Webb Space Telescope (JWST) and the Atacama Large Millimetre Array (ALMA).
Coronal energy release by MHD avalanches
Authors: Cozzo G. , Reid J. , Pagano P. , Reale F. , Testa P. , Hood A. W. , Argiroffi C. , Petralia A. , Alaimo E. , D’Anca F. , Sciortino L. , Todaro M. , Lo Cicero U. , Barbera M. , de Pontieu B. , Martinez-Sykora J.
Published: June 2024

Context. Magnetohydrodynamic (MHD) instabilities, such as the kink instability, can trigger the chaotic fragmentation of a twisted magnetic flux tube into small-scale current sheets that dissipate as aperiodic impulsive heating events. In turn, the instability could propagate as an avalanche to nearby flux tubes and lead to a nanoflare storm. Our previous work was devoted to related 3D MHD numerical modeling, which included a stratified atmosphere from the solar chromosphere to the corona, tapering magnetic field, and solar gravity for curved loops with the thermal structure modelled by plasma thermal conduction, along with optically thin radiation and anomalous resistivity for 50 Mm flux tubes.

Aims. Using 3D MHD modeling, this work addresses predictions for the extreme-ultraviolet (EUV) imaging spectroscopy of such structure and evolution of a loop, with an average temperature of 2–2.5 MK in the solar corona. We set a particular focus on the forthcoming MUSE mission, as derived from the 3D MHD modeling.

Methods. From the output of the numerical simulations, we synthesized the intensities, Doppler shifts, and non-thermal line broadening in 3 EUV spectral lines in the MUSE passbands: Fe IX 171 Å, Fe XV 284 Å, and Fe XIX 108 Å, emitted by ∼1 MK, ∼2 MK, and ∼10 MK plasma, respectively. These data were detectable by MUSE, according to the MUSE expected pixel size, temporal resolution, and temperature response functions. We provide maps showing different view angles (front and top) and realistic spectra. Finally, we discuss the relevant evolutionary processes from the perspective of possible observations.

Reults. We find that the MUSE observations might be able to detect the fine structure determined by tube fragmentation. In particular, the Fe IX line is mostly emitted at the loop footpoints, where we might be able to track the motions that drive the magnetic stressing and detect the upward motion of evaporating plasma from the chromosphere. In Fe XV, we might see the bulk of the loop with increasing intensity, with alternating filamentary Doppler and non-thermal components in the front view, along with more defined spots in the topward view. The Fe XIX line is very faint within the chosen simulation parameters; thus, any transient brightening around the loop apex may possibly be emphasized by the folding of sheet-like structures, mainly at the boundary of unstable tubes.

Conclusions. In conclusion, we show that coronal loop observations with MUSE can pinpoint some crucial features of MHD-modeled ignition processes, such as the related dynamics, helping to identify the heating processes.
State policy of the Russian Federation in the field of seed production
Authors: Skvortsova Tatyana , Pratsko Gennady , Marchenko Ekaterina , Alimova Olga , Shatveryan Nelli
Published: June 2024

The aim of the study presented in the article is to examine the governmental policy of the Russian Federation in the sphere of seed cultivation. The attainment of this objective is the direct outcome of an indepth exploration into the seed market landscape, alongside an extensive review of regulatory frameworks and programmatic directives governing seed production within the Russian Federation. Throughout the investigative process, the scholars meticulously applied analytical and synthetic methodologies, complemented by systemic and structural-functional techniques inherent in scientific research. Furthermore, the study incorporated the interpretation of legal statutes and adept utilization of logical reasoning as integral components of the methodological framework. According to the findings from an investigation into the governmental policy concerning seed production in Russia presently, the researchers have deduced that there is a need to broaden the state mechanisms aimed at fostering the growth of the native seed market. It is proposed to create special mechanisms to support business entities that are engaged in the direct production (cultivation) of seeds of agricultural plants, including various economic incentive measures. The scholars also determined that enhancing governmental efforts to improve seed production through the integration of strategies aimed at bolstering the beekeeping industry, as well as implementing measures centered on the conservation of biodiversity and the protection of plant pollinators, is of utmost importance.
Activation parameters of viscous flow of guar gum and its cross-linked system
Authors: Filatova A.V. , Azimova L.B. , Djurabaev D.T. , Radjabov O.I. , Otajonov A.Yu. , Yakubova R.A.
Published: June 2024

The structure of a cross-linked form of a concentrated solution of guar gum was studied using IR spectroscopy. The processes of viscous flow of concentrated solutions of guar gum and its cross-linked system have been studied. It is shown that this system is a non-Newtonian fluid with a thixotropic type of viscous flow anomaly, which is also determined by the nature of the complexing agent. The influence of temperature on viscous flow processes, as well as the structure of aqueous systems of guar gum and its cross-linked form, were studied based on the average statistical sizes of kinetic units, which makes it possible to estimate the mobility of structural elements and their sizes for concentrated systems. The activation parameters of the viscous flow of aqueous systems of guar gum and its cross-linked system were studied. Calculations of thermodynamic parameters were carried out free energy, heat of activation of viscous flow, characterizing the strength of structures, and entropy of activation of viscous flow, characterizing the ordering of structures. At high shear stresses, for the guar gum solution system, the processes of ordering and orientation prevail during flow, and for the guar gum - pentaerythritol borate system, the processes of structure destruction and disordering prevail.
Application of pectin-containing concentrate from Portúlaca Olerácea in the production of first-grade wheat bread
Authors: Khakimova Bakhor , Atkhamova Saida , Radjabov Mansur , Sanayev Ermat , Khakimova Oliya , Irnazarov Shukhrat
Published: June 2024

With the help of food additives from plant raw materials, you can increase the nutritional value of the product and give it medicinal properties. Such additives include pectin, which is a natural detoxifier. Of particular interest are studies of pectins, which have high protective properties against radioactive metals entering the human body. The purpose of this study was to study the possibility of using pectin concentrate from purslane in the production of bread. The objects of the study were pectin concentrates from purslane; Wheat flour; bread samples. A bread recipe has been developed with the addition of pectin concentrate from Portúlaca olerácea (purslane). When adding the concentrate, the dimensional stability of the product improves, the porosity and specific volume of the bread increases. The amount of concentrate that has the most beneficial effect on the duration of fermentation and the quality of bread is 0.5% of the amount of flour. With this dosage, the best organoleptic characteristics are achieved. All physical and chemical indicators remain within the requirements of regulatory documents. This bread can be recommended for preventive nutrition, since pectin concentrate has a therapeutic effect on the human body. Analysis of bread made from first grade wheat flour by adding pectin concentrate 0.5% by weight of flour was carried out at the State Scientific Center for Quality Control. In our opinion, it is advisable to use pectin-containing concentrate from purslane, as the most accessible and cheapest raw material.
Transformation of customer experience management in the restaurant business in the context of digitalization
Authors: Akhmedova Rimma
Published: June 2024

The catering sector in Russia today is being significantly transformed under the influence of two modern factors: the transition to a digital model of orders and a decrease in the purchasing power of the population in general. In the context of digitalization and increased competition, restaurant business enterprises are faced with the need to improve the efficiency of customer experience management. Customer experience is a set of impressions, emotions, knowledge that the customer receives at all stages of interaction with the PSR. The purpose of the study is to determine the direction of transformation of customer experience management in the restaurant business in the context of digitalization. Methodology and organization of the study. In this work, a complex was used, consisting of econometric methods, methods of comparative and system analysis, and generalization. Special literature on the chosen research topic was also analyzed. In particular, sources on the problem of customer experience management, digitalization of structures included in the public catering system became the basis for the literature review. Some of the materials were taken from the RSCI and Scopus websites. business.
Monitoring the species composition of the undergrowth in some regions of Armenia and central Russia
Authors: Vardanyan Zaruhi , Bayramyan Lilia , Lebedev Aleksandr , Sahakyan Gayane , Mkhitaryan Hasmik , Gostev Vladimir , Gosteva Darya
Published: June 2024

Changes in the species composition of tree species of the undergrowth, the tasks of preserving biodiversity in clearing areas and under the influence of climate change, are of theoretical and practical scientific interest. The main goal of this study was to monitor the species diversity of dominant undergrowth species in the forests of some regions of Armenia and central Russia under conditions of climate change and human activity. In Armenia, research was carried out in Lori and Tavush regions. In Russia, research was carried out in the Kostroma and Moscow regions, located in the center of the Russian Plain. The studies were carried out using route, semi-stationary, stationary methods using generally accepted methods. Field work was carried out during growing seasons from 2019 to 2023. Field surveys were carried out in the most typical forest types for the regions. In the Lori region, 14 families were identified, which include the dominant species of undergrowth, in the Tavush region - 11 families and in the regions of central Russia - 11 families. For all objects of study, the largest number of species contains the Rosaceae family. The main factors influencing understory biodiversity are human activities (logging, recreational impacts, etc.) and climate change. Thus, changes in the climate system of the regions of Armenia and central Russia in the future create new risks for the sustainability of undergrowth biological diversity in forests.
Compulsory alienation of land plots: A historical review and some results of legal regulation
Authors: Trifonova Kristine , Kazaryan Karine
Published: June 2024

Ensuring the inviolability of the right of private property is one of the main constitutional guarantees of the subjective right of any person, and at the same time it acts as a condition for building and an indisputable requirement for a state governed by the rule of law. However, modern experience shows that under the conditions of present-day public life, the right of ownership is not absolute,not excluding land, and there is no unlimited power of the owner over the land plots belonging to him. The right of ownership is limited by considerations of the so-called social function of the state, service to public interests and other factors. State reserves the right and prescribes a special mechanism with a certain number of grounds that allow the compulsory restriction on private ownership of land in cases strictly specified by law. The possibility of restricting private property for various purposes comes from the doctrinal provision of the binding nature of property itself. However, the use of such instruments of influence should not be the subject of abuse by a State or officials in order to redistribute property. At the same time, the current legal regulation in any case is based on the historical experience of both Russia and foreign countries. Within the framework of the article, the authors attempt to give a brief analysis of the history of legal regulation on alienation of land plots, analyzing the relevant constitutional, civil, and criminal law norms.
Test bench for throttle flow dividers-adders
Authors: Rybak Alexander , Meskhi Besarion , Rudoy Dmitry , Olshevskaya Anastasiya , Teplyakova Svetlana , Kolesnikov Ivan , Prutskov Alexey
Published: June 2024

The control of modern mobile machinery and technological equipment increasingly relies on the utilization of multi-circuit and branched hydraulic drives. The complexity of technological processes and the demand for precise and consistent executive movements present challenges for hydraulic drive developers. Throttle flow dividers are utilized to synchronize mechanisms powered by a single power source. The article discusses the creation and implementation of a testing platform for throttle dividers and flow dividers-adders, commonly used in various technical systems for regulating liquid or gas flow. It delves into the fundamental principles of throttle flow dividers-adders and details the design and functionality of the developed test bench. The results of experiments conducted to evaluate the bench's operation and measure accuracy are presented, providing insights into its efficacy and reliability for testing throttle flow dividers-adders.
Safety assessment of technical systems based on limit values
Authors: Teplyakova Svetlana , Rybak Alexander , Meskhi Besarion , Rudoy Dmitry , Prutskov Alexey , Olshevskaya Anastasiya , Kulikova Natalia , Romanov Maxim
Published: June 2024

Ensuring the safe operation of complex technical systems is an urgent task. Complex technical systems include lifting, mobile, agricultural machinery, etc. Absolutely every complex system fails during operation. At the same time, failures can have different effects not only on reliability indicators, but also on the degree of safety. The degree of safety of operation of complex equipment is directly influenced by the probability and nature of the occurrence of failures. Thus, in order to increase operational safety, it is necessary to reduce the risk of a negative event, which is defined as the possibility of an adverse event occurring, that is, a combination of the degree of negative consequences with the possibility of its occurrence. The article provides an example of calculating the risk of failure; a method for calculating the parameters of the three-parameter Weibull distribution is proposed; an algorithm for determining three parameters of the Weibull law for a sample is given; the results of parameter calculations are presented; Proposals have been put forward for ways to increase the level of reliability and safety, respectively.
Implementation of robotic technologies in agriculture
Authors: Rudoy Dmitry , Olshevskaya Anastasiya , Odabashyan Mary , Vershinina Anna , Marchenko Sergey , Sarkisian Dzhuletta , Prutskov Alexey , Kulikova Natalya
Published: June 2024

Agrobots are technological innovations that raise agricultural processes to a completely new level of development. In agriculture, robotic units replace the labor of numerous working teams, facilitate, speed up and simplify the picking of fruits, spraying of soil and crops, supply of feed, and transportation of crops. Keywords: robots, agro-industrial complex, productivity, digitalization, mechanization, crop production, green agriculture.
Sociocultural aspect of landscape components in the conditions of urban environment
Authors: Zakharova Natalya , Lopatchenko Tatiana
Published: June 2024

Applying the scientific discourse approach, the article examines different aspects of landscape design related issues. We analyze the fundamental principles of landscaping to examine its connections with sociocultural aspect. Terrain, water, and vegetation, as aspects of landscape design and the connections with culture and society are analyzed. Their functional significance uncovered within the framework of sociocultural aspect. Various combinations and relations of the landscape design components are analyzed from the viewpoint of their social and cultural focus. We revealed the sociocultural aspect of landscape components in the conditions of the urban environment. The development of landscape components should be applied using a bionic formative element that includes the sociocultural aspect of the region. The cultural recognizability of scenery components creates a psychologically comfortable environment in the cityscape.
The Australian red-clawed crayfish (Cherax quadicarinatusVon Martens 1868) is a promising aquaculture object for the south of the Russian Federation
Authors: Shevchenko Viktoriya , Rudoy Dmitry , Ivanov Yuri , Olshevskaya Anastasiya , Оdabashyan Mary , Prutskov Alexey , Kulikova Natalya , Zhumbei Anton
Published: June 2024

The paper presents information about a promising aquaculture object for the south of the Russian Federation - the Australian red-clawed crayfish Cherax quadicarinatus Von Martens 1868. A brief description of its biological characteristics, which are the main factor in the development of specific biotechnologies for its commercial cultivation, is given. The main limiting factor in the artificial cultivation of this species is water temperature. The article indicates that for Russian conditions, three possible directions for growing Australian crayfish can be distinguished: in ponds in the southern regions of Russia in natural climatic conditions (summer); in ponds, cages and pools on warm waters of energy facilities in the summer; in closed water supply installations – year-round. A technology has been proposed for combined cultivation of crayfish, in which the production of juveniles is carried out in controlled basin conditions, and the cultivation of commercial products in earthen ponds in warm seasons, when the water temperature corresponds to the biological needs of the species.
The use of information technology in teaching a foreign language for specialists of agroindustrial complex
Authors: Kaneeva Anna , Bagdasaryan Tatyana , Tyutyunnik Marina , Nikushina Marina
Published: June 2024

In modern society, the agro-industrial complex plays an important role in the economy of any country. That is why the education and training of specialists in the agro-industrial complex is a priority for the country. The use of foreign materials, technical equipment, and business contacts within the framework of concluding agreements with friendly countries require knowledge of foreign languages. The lack of knowledge of foreign languages is a hindering factor in the development of the agroindustrial sector. Modern technologies provide a huge range of opportunities to improve the level of knowledge of foreign languages. New technologies are becoming part of the educational process. The use of mobile devices in foreign language lessons is an urgent trend in the methodology, which requires new approaches and non–standard solutions. In this regard, there is a need to develop a methodology for using mobile technologies in English language teaching. The article describes the features of the introduction of mobile applications in the organization of students' work in teaching foreign languages. Electronic devices are increasingly being used as tools for education and language learning. As for interactive learning applications, students can use them to improve and control their skills in learning a foreign language. The features of mobile applications and their impact on the educational process are also revealed. Mobile applications are considered as a way of teaching vocabulary and grammar of the English language; the possibilities of practical use of mobile devices are analyzed. The purpose of this study is to review and describe English language learning using mobile applications. The article also deals with advantages and disadvantages while using apps in learning a foreign language, the essence and features of mobile applications in the educational process are considered.
The role of the art of creating a comfortable festive landscape and architectural environment of a multinational city in the formation of a creative personality of young people
Authors: Goryacheva Elena , Vlasova Irina , Kuzmenko Alexey
Published: June 2024

International holidays such as New Year, Christmas, Epiphany, and in Russia, the Russian Old New Year have historically developed as folk traditions with history, customs, rituals, and symbols of celebration filled with specific spirituality. All these celebrations commonly take place in houses and nature with a festive landscape and a green beauty, a Christmas tree and reservoirs filled with symbolic images of traditional holiday heroes. Since childhood, people have been participating in such dear and memorable events related to the history of family and loved ones. The landscape and architectural space of a solemnly decorated city should take into account the cultural, psychological, and historical part of the positive motivations of residents and visitors. Designers and specialists who creatively designed the city's festive landscape and architectural territory should be able to connect the historical, religious, symbolic, psychological, and social foundations of such a multinational city as Rostov-on-Don. For young people, these holidays represent another opportunity to unite with other participants in understanding the joyful time and the community of people around them.
Regulation of atmospheric optical quantum communication links
Authors: Minbaleev Alexey , Evsikov Kirill
Published: June 2024

The Russian Federation in 2023 adopted the concept of regulation of the quantum communication industry until 2030. The authors of this article took part in its development. The document substantiates the need to improve the legislation in optical communication. The study reveals that there is no global reference system for legally regulating optical communication, which will pose challenges in effectively overseeing atmospheric optical quantum communication lines. The article presents priority measures aimed at regulating atmospheric optical quantum communication lines, which will expand the commercial potential of quantum communication. The authors propose measures to protect the rights of users of quantum communication services, as well as the rights of owners of atmospheric optical quantum communication lines. In order to facilitate the operation of atmospheric optical quantum communication lines, it is essential to adopt measures beforehand, as legal uncertainties pose limitations on infrastructure project development.
Harnessing artificial intelligence for human resources management: Tools, advantages, and risks in the energy sector
Authors: Masa’d Fawzieh Mohammed , Al-maaitah Tamara Adel , Al-maaitah Dirar Abdelaziz , Qawasmeh Esraa Farid , Qatawneh Nour Abdulwahab
Published: June 2024

The main goal of the study is aimed at determining the features of the use of artificial intelligence in HR in the energy sector. The relevance and necessity of the study is due to the increasing intensity of the introduction of artificial intelligence in all sectors of the world economy, which necessitates the need to improve existing and search for new management approaches in companies in the energy sector. The introduction of artificial intelligence technologies into HR business processes is justified. Artificial intelligence tools in HR are considered, the advantages and disadvantages of each of them are highlighted. The focus is on artificial intelligence in HR processes of energy companies: personnel training and development. The ways of using artificial intelligence in HR and its impact on HR business processes and personnel efficiency are highlighted. The prospects for the development of HR systems, difficulties, dangers and risks of using artificial intelligence in HR business processes are covered. The results of the study can be used in practice when organizing a human resource management strategy for a company in the energy sector using trending artificial intelligence technologies and to ensure the efficiency of these business processes.
Applying AI and fuzzy modeling to optimize advertising effectiveness in digital marketing strategies for the energy sector
Authors: Al Muala Ayed Moh`d
Published: June 2024

The purpose of the study is to formulate the main aspects of the use of artificial intelligence in advertising and determine its effectiveness in the energy sector. The intensity of development of artificial intelligence technologies and its application to ensure the effectiveness of advertising activities of companies in the energy sector is emphasized. The ethical and practical aspects of using artificial intelligence in advertising are presented. An analysis of the efficiency factors of the advertising process was carried out based on the classification of tools and methods of advertising automation using artificial intelligence technologies. Practical recommendations for the use of neural networks based on artificial intelligence have been formed. The provisions of the classical and meta-heurastic methods of parametric identification of a fuzzy system, which is a model of the marketing process of companies in the energy sector, are substantiated. The effectiveness of advertising was determined using the methodology of modeling fuzzy systems and the sequence of computational steps of a fuzzy neural system. The practical significance of the results lies in the fact that metaheuristic methods make it possible to assess the effectiveness of advertising based on the use of artificial intelligence tools by companies in the energy sector.
Theoretical substantiation of the optimal parameters and shape of the working parts of a spring soil leveler
Authors: Sobolevsky I.V. , Kuklin V.A. , Kalafatov I.I. , Kanevskaya A.A.
Published: June 2024

The article presents a theoretical justification for the optimal parameters and shape of the working parts of a spring soil leveler. For this purpose, an effective design scheme for a spring soil leveler was developed. A curved bar consisting of three working surfaces with a toothed comb in the lower part is proposed as a working body of the spring equalizer. Taking into account the physical and mechanical properties of the soils of the Republic of Crimea and the agrotechnical requirements for erosion control treatment, the angles α, β, γ and the dimensions of the compacting-cutting part AB, the leveling part BC and the limiting part CD of the leveling bar of the elastic soil leveler are justified. A theoretical dependence was obtained to determine the required value of the damper stiffness coefficient kd. The range of adjustment of the angle of the leveling bar varies from 15 to 35 degrees. The length of the leveling bars also varies in the range from 140 to 200 mm. The technological train of the developed spring leveler will form a leveled surface and form a ribbed soil microrelief resistant to wind erosion.
Waste management: Environmental strategies and practices
Authors: Yuzvovich Larisa , Lvova Maya , Isakova Natalya
Published: June 2024

In the face of escalating environmental challenges, the management of domestic and industrial waste emerges as a critical area of concern and action. The scientific article “Waste Management: Environmental Strategies and Practices” delves into the complex dynamics of waste management systems, exploring innovative strategies and practices that aim to mitigate environmental impact, promote recycling, and transition towards a circular economy. It begins by outlining the current global waste management crisis, characterized by unsustainable disposal practices and escalating volumes of waste. The article then transitions to a comprehensive analysis of various waste management models that incorporate ecological principles, such as waste minimization, reuse, and resource recovery. Through a multidisciplinary approach, it evaluates the effectiveness of these models in different geopolitical and socio-economic contexts, highlighting the importance of adaptability and community engagement. The study also introduces cutting-edge technologies and methodologies in waste processing and disposal, emphasizing their potential to reduce carbon footprint, conserve natural resources, and enhance environmental sustainability. Furthermore, the article discusses the role of policy frameworks, public awareness, and education in fostering a more responsible and efficient waste management culture. By providing a holistic overview of environmental strategies and practices in waste management, this article contributes valuable insights to the ongoing discourse on ecological conservation and sustainability.
A method to manufacture spiral bevel gears by equivalent completing
Authors: Geng Longlong , Nie Shaowu , Jiang Chuang
Published: June 2024

As a transmission part for industrial application the manufacture of spiral bevel gear is particularly important. The present machining methods for manufacturing spiral bevel gears, including the so called five-cut method and completing method, have drawbacks such as low processing efficiency, requiring complex calculations and high requirements on the machine-tool performance, respectively. To solve the above problems, an equivalent completing method is proposed to process spiral bevel gear in this paper. Firstly the machine setting parameters by completing were translated from the Cradle-type hypoid generator to Cartesian-type hypoid generator and the workpiece is swing during process. CNC motion axes expression of Cartesian-type hypoid generator were expressed as sixth-order polynomial, the influences of coefficient on the tooth surface topology were researched. Then the method to machine spiral bevel gear was put forward by reducing the swing axis of workpiece, obviously a deviation of tooth surface was caused between theoretical and axis-reduced. As a response, a flank correction model was established and the other polynomial coefficients were adjusted to eliminate the deviation. Finally simulation and cutting experiment were carried out by a numerical example. The experimental results show that the proposed method is effective and feasible. The method proposed in this paper overcome and enrich the disadvantages of existing manufacture methods of spiral bevel gear.
57Co-Flächenquellen und 99mTc-Flächenphantome für die Qualitätssicherung in der Nuklearmedizin
Authors: Kühnel Christian , Seifert Philipp , Freesmeyer Martin
Published: June 2024

Ziel Die wöchentliche Qualitätssicherung in der nuklearmedizinischen Diagnostik umfasst die Verwendung von radioaktiven Quellen und Phantomen, um eine gleichbleibende Leistung von Gammakameras, insbesondere im Hinblick auf die Homogenitätsüberprüfung, zu gewährleisten. Faktoren wie Quellenauswahl, physikalische Bedingungen, Strahlenbelastung und wirtschaftliche Überlegungen beeinflussen diesen Prozess. Diese Studie berichtet über die Verwendung von Flächenquellen und -phantomen zur Qualitätssicherung und erörtert die Vor- und Nachteile im klinischen Kontext, wobei die Notwendigkeit aktualisierter Untersuchungen aufgrund der seit den 1980er-Jahren veränderten Bedingungen hervorgehoben wird.

Methoden Eine 57Co-Floodquelle (ca. 740 MBq) und ein
mit 99mTc (ca. 600 MBq) befüllbares Flächenphantom wurden 1 Jahr lang wöchentlich
mit einer Doppelkopf-SPECT-Gammakamera auf Ausbeute/Empfindlichkeit gemessen. Für
Dosisleistungsmessungen in µSv/h H*(10) wurde ein kalibriertes Dosisleistungsmessgerät für
Messungen in 0, 1 und 2 m Entfernung verwendet.

Ergebnisse Die Kosten für die untersuchte 57Co-Quelle betrugen 3226,00 ± 1151,00 € (Median: 3310,00 €; Bereich: 2979,00–5996,00 €) über die letzten 10 Jahre je nach Lieferant. Ein zweijähriger Austauschzyklus war erforderlich. Die Kosten für die Flächenphantome einschließlich Ausrüstung liegen zwischen 3810,00 € und 8965,00 €. Die durchschnittlichen Kosten für einen Molybdän-Generator betrugen in den letzten 10 Jahren 1197,00 ± 144,00 € (Median: 1195,00 €; Spanne: 981,00–1547,00 €), mit einer durchschnittlichen jährlichen Wachstumsrate von 4 %. Die Handhabungszeit für die Homogenitätsüberprüfung mit einer 57Co-Flächenquelle betrug 60 ± 12 s (Median: 62 s; Bereich: 48–97 s). Die mittleren Dosisleistungen lagen dabei bei 282,3 µSv, 7,4 µSv und 2,7 µSv in 0, 1 bzw. 2 m Entfernung. Die Handhabungszeit für 99mTc-Flächenphantome lag im Mittel bei 451 ± 67 s (Median: 448 s; Bereich: 395–657 s), was zu 2,7 mSv, 91,8 µSv bzw. 37,5 µSv im Jahr führte.

Diskussion
57Co-Flächenquellen bieten eine schnellere Handhabung, eine geringere Dosisleistung im Zeitverlauf und einen geringeren Platzbedarf. Sie erfordern jedoch höhere Anschaffungs- und Entsorgungskosten, zusätzliches Zubehör und können Verunreinigungen aufweisen. Die Ergebnisse von Homogenitätsüberprüfungen oder der Bestimmung der Ausbeute sind dabei nicht auf andere Nuklide übertragbar. 99mTc-Flächenphantome hingegen sind lange verwendbar, verursachen kaum Folgekosten und entsprechen dem Leitnuklid der Mehrzahl der klinischen Untersuchungen. Die Messzeiten sind aufgrund der gleichbleibenden Aktivität vergleichbar und die optionale Verwendung von Umwälzpumpen sorgt für eine verbesserte Arbeitssicherheit. Demgegenüber bestehen jedoch potenziell höhere Expositionen des Personals, Herausforderungen bei der Reinigung und dem größeren Platzbedarf.
Management of Ruptured Intracranial Aneurysm with Deep Vein Thrombosis
Authors: Pandit Sneha , Dube Surya K. , Sokhal Suman , Chaturvedi Arvind
Published: June 2024

Deep vein thrombosis (DVT) is a known complication of aneurysmal subarachnoid hemorrhage (aSAH), and anticoagulant therapy is crucial for its management. However, in case of a ruptured intracranial aneurysm in a patient of DVT, anticoagulant administration may lead to rebleeding. Anticoagulants are also associated with a risk of hematoma expansion. A systematic approach is required to weigh the risk and benefit ratio while managing such cases. We report the successful management of a 61-year-old female presenting with aSAH and associated DVT who had an intracranial vessel injury during intraoperative clipping of an aneurysm.
Neurological Effects of Stimulants and Hallucinogens
Authors: Hass Reece M. , Stitt Derek
Published: June 2024

In this article, we will discuss the history, pharmacodynamics, and neurotoxicity of psychostimulants and hallucinogens. The drugs discussed are widely used and have characteristic toxidromes and potential for neurological injuries with which the practicing clinician should be familiar. Psychostimulants are a class of drugs that includes cocaine, methamphetamine/amphetamines, and cathinones, among others, which produce a crescendoing euphoric high. Seizures, ischemic and hemorrhagic strokes, rhabdomyolysis, and a variety of movement disorders are commonly encountered in this class. Hallucinogens encompass a broad class of drugs, in which the user experiences hallucinations, altered sensorium, distorted perception, and cognitive dysfunction. The experience can be unpredictable and dysphoric, creating a profound sense of anxiety and panic in some cases. Recognizing the associated neurotoxicities and understanding the appropriate management is critical in caring for these patient populations. Several of these agents are not detectable by standard clinical laboratory analysis, making identification and diagnosis an even greater challenge.
Substance Use Disorder Treatment: Opportunities for Interdisciplinary Collaboration in Neurology and Beyond
Authors: Stoller Kenneth B.
Published: June 2024

Driving the overdose epidemic, a significant proportion of adult and adolescent patients seen in neurology practice and hospital settings has substance use disorder. Fortunately, there are effective treatments available, in particular for opioid addiction. Some elements of treatment can be delivered directly in medical office-based settings, while others are best provided from within specialized addiction treatment facilities. In this article, we review the nature of substance use disorders, and the various treatment approaches that can be utilized to stabilize patients and facilitate their building a strong recovery foundation. Some interventions discussed may be directly provided by a physician identifying the disorder, while others involve collaboration with specialized addiction treatment centers and recovery support entities.
Idiopathic Hemiconvulsion Hemiplegia Epilepsy in an Eight-Year-Old Boy! Is It the Time to Revisit the HHE Definition?
Authors: Kamate Mahesh , Hattiholi Virupaxi
Published: June 2024

Idiopathic hemiconvulsion hemiplegia epilepsy (IHHE) syndrome is characterized by the combination of unilateral convulsive status epilepticus, mainly clonic, followed by transient or permanent ipsilateral hemiplegia. It occurs in infants during the course of a nonspecific febrile illness, mainly in the first 2 years of life and in any case before the age of 4 years. Most studies have mentioned that disease occurs in children younger than 4 years. The exact cause of unilateral involvement is not clear. Occurrence of this condition beyond 4 years of age has rarely been described. We report here a previously healthy 8-year-old boy who presented with right hemiclonic seizures for almost 2 weeks occurring along with nonspecific viral illness. He had residual right hemiparesis and his magnetic resonance imaging (MRI) of the brain showed left hemispheric cortical edema with diffusion restriction. The workup for neuroinfections, mitochondriopathy, and MR angiography was negative. The child improved with injection methyl prednisolone pulse therapy along with multiple intravenous and oral antiseizure medications. This case report suggests that IHHE can also occur beyond 4 years of age, and there is a need to revise the diagnostic criteria of IHHE.