bluuebunny/crossref_metadata_2025 huggingface dataset:
Non-resonant relaxation of rotating globular clusters
Authors: Tep Kerwann , Fouvry Jean-Baptiste , Pichon Christophe
Published: June 2024

The long-term relaxation of rotating, spherically symmetric globular clusters is investigated through an extension of the orbit-averaged Chandrasekhar non-resonant formalism. A comparison is made with the long-term evolution of the distribution function in action space, measured from averages of sets of N-body simulations up to core collapse. The impact of rotation on in-plane relaxation is found to be weak. In addition, we observe a clear match between theoretical predictions and N-body measurements. For the class of rotating models considered, we find no strong gravo-gyro catastrophe accelerating core collapse. Both kinetic theory and simulations predict a reshuffling of orbital inclinations from overpopulated regions to underpopulated ones. This trend accelerates as the amount of rotation is increased. Yet, for orbits closer to the rotational plane, the non-resonant prediction does not reproduce numerical measurements. We argue that this mismatch stems from these orbits’ coherent interactions, which are not captured by the non-resonant formalism that only addresses local deflections.
TDCOSMO
Authors: Wells Patrick R. , Fassnacht Christopher D. , Birrer Simon , Williams Devon
Published: June 2024

Context. Time-delay cosmography is a technique for measuring H0 with strong gravitational lensing. It requires a correction for line-of-sight perturbations, and thus it is necessary to build tools to assess populations of these lines of sight efficiently.

Aims. We demonstrate the techniques necessary to analyze line-of-sight effects at a population level, and investigate whether strong lenses fall in preferably overdense environments.

Methods. We analyzed a set of 25 galaxy-galaxy lens lines of sight in the Strong Lensing Legacy Survey sample using standard techniques, then performed a hierarchical analysis to constrain the population-level parameters. We introduce a new statistical model for these posteriors that may provide insight into the underlying physics of the system.

Reults. We find the median value of κext in the population model to be 0.033 ± 0.010. The median value of κext for the individual lens posteriors is 0.008 ± 0.015. Both approaches demostrate that our systems are drawn from an overdense sample. The different results from these two approaches show the importance of population models that do not multiply the effect of our priors.
Energetic explosions from collisions of stars at relativistic speeds in galactic nuclei
Authors: Hu B. X. , Loeb A.
Published: June 2024

Aims. We investigated collisions that could occur between stars moving near the speed of light around supermassive black holes (SMBHs) with mass M• ≳ 108 M⊙, without being tidally disrupted. Within this approximate SMBH mass range, for sun-like stars, the tidal-disruption radius is smaller than the SMBH’s event horizon; therefore we did not anticipate tidal disruption events (TDEs).

Methods. Differential collision rates were calculated by defining probability distribution functions for various parameters of interest, such as the impact parameter, distance from the SMBH at the time of the collision, the relative velocity between the two colliding stars, and the masses of the two colliding stars. The relative velocity parameter was drawn from an appropriate distribution function for SMBHs. We integrated over all these parameters to arrive at a total collision rate for a galaxy with a specific SMBH mass. We then considered how the stellar population in the vicinity of the SMBH was depleted and replenished over time, and calculated the effect this can have on the collision rate over time. We further calculated the differential collision rate as a function of the total energy released, the energy released per unit mass lost, and the galactocentric radius.

Results. The overall rate for collisions taking place within the inner ∼1 pc of galaxies with M• = 108, 109, and 1010 M⊙ are Γ ∼ 2.2 × 10−3, 2.2 × 10−4, and 4.7 × 10−5 yr−1, respectively. The most common collisions would release energies on the order of ∼1049 − 1051 ergs, with the energy distribution peaking at higher energies in galaxies with more massive SMBHs. In addition, we examined sample light curves for collisions with varying parameters, and find that the peak luminosity could reach or even exceed that of superluminous supernovae (SLSNe), albeit in the case of light curves with much shorter durations.

Conclusions. Weaker events may initially be mistaken for low-luminosity supernovae. In addition, we note that these events would likely create streams of debris that would accrete onto the SMBH, potentially creating accretion flares that may resemble TDEs.
Study of hydrated asteroids via their polarimetric properties at low phase angles
Authors: Geem Jooyeon , Ishiguro Masateru , Naito Hiroyuki , Hasegawa Sunao , Takahashi Jun , Bach Yoonsoo P. , Jin Sunho , Takagi Seiko , Ono Tatsuharu , Kuroda Daisuke , Sekiguchi Tomohiko , Kuramoto Kiyoshi , Nakamura Tomoki , Watanabe Makoto
Published: June 2024

Context. Ch-type asteroids are distinctive among other dark asteroids in that they exhibit deep negative polarization branches (NPBs). Nevertheless, the physical and compositional properties that cause their polarimetric distinctiveness are less investigated.

Aims. We aim to investigate the polarimetric uniqueness of Ch-type asteroids by making databases of various observational quantities (i.e., spectroscopic and photometric properties as well as polarimetric ones) of dark asteroids.

Methods. We conducted an intensive polarimetric survey of 52 dark asteroids (including 31 Ch-type asteroids) in the RC band to increase the size of polarimetric samples. The observed data were compiled with previous polarimetric, spectroscopic, and photometric archival data to find their correlations.

Results. We find remarkable correlations between these observed quantities, particularly the depth of NPBs and their spectroscopic features associated with the hydrated minerals. The amplitude of the opposition effect in photometric properties also shows correlations with polarimetric and spectral properties. However, these observed quantities do not show noticeable correlations with the geometric albedo, thermal inertia, and diameter of asteroids.

Conclusions. Based on the observational evidence, we arrive at our conclusion that the submicrometer-sized structures (fibrous or flaky puff pastry-like structures in phyllosilicates) in the regolith particles could contribute to the distinctive NPBs of hydrated asteroids.
Characteristics and energy flux distributions of decayless transverse oscillations depending on coronal regions
Authors: Lim Daye , Van Doorsselaere Tom , Berghmans David , Petrova Elena
Published: June 2024

Context. It has been proposed that the slope (δ) of the power-law distribution between the energy flux and oscillation frequency could determine whether high-frequency transverse oscillations make a dominant contribution to the heating (δ <  1). A meta-analysis of decayless transverse oscillations revealed that high-frequency oscillations potentially play a key role in heating the solar corona.

Aims. We aim to investigate whether or not (and, if so, how) the distributions of the energy flux contained in transverse oscillations, and their slopes, depend on the coronal region in which the oscillation occurs.

Methods. We analysed transverse oscillations from 41 quiet Sun (QS) loops and 22 active region (AR) loops observed by Solar Orbiter/Extreme Ultraviolet Imager (EUI) HRIEUV. We estimated the energy flux and energy using analysed oscillation parameters and loop properties, such as periods, displacement amplitudes, loop lengths, and minor radii of the loops.

Results. We find that about 71% of QS loops and 86% of AR loops show decayless oscillations, and that the amplitude does not change depending on different regions, but the difference in the period is more pronounced. Although the power law slope (δ = −1.79) in AR is steeper than that (δ = −1.59) in QS, both of them are significantly less than the critical slope of 1.

Conclusions. Our statistical study demonstrates that high-frequency transverse oscillations can heat the QS. For ARs, the total energy flux is insufficient unless yet-unobserved oscillations with frequencies of up to 0.17 Hz are present. Future EUI campaigns will be planned to confirm whether a corresponding high-frequency oscillation exists.
An in-depth analysis of the differentially expanding star cluster Stock 18 (Villafranca O-036) using Gaia DR3 and ground-based data
Authors: Maíz Apellániz J. , Youssef A. R. , El-Nawawy M. S. , Elsanhoury W. H. , Sota A. , Pantaleoni González M. , Ahmed A.
Published: June 2024

Context. The Villafranca project is combining Gaia data with ground-based surveys to analyze Galactic stellar groups (clusters, associations, or parts thereof) with OB stars.

Aims. We want to analyze the poorly studied cluster Stock 18 within the Villafranca project, as it is a very young stellar cluster with a symmetrical and compact H II region around it, Sh 2-170, so it is likely to provide insights into the structure and dynamics of such objects at an early stage of their evolution.

Methods. We used Gaia astrometry, photometry, spectrophotometry, and variability data as well as ground-based spectroscopy and imaging to determine the characteristics of Stock 18. We used these data to analyze its core, massive star population, extinction, distance, membership, internal dynamics, density profile, IMF, stellar variability, and Galactic location.

Results. Stock 18 is a very young (∼1.0 Ma) cluster located at a distance of 2.91 ± 0.10 kpc and is dominated by the GLS 13 370 system, whose primary (Aa) is an O9 V star. We propose that Stock 18 was in a very compact state (∼0.1 pc) about 1.0 Ma ago and that most massive stars were ejected at that time without significantly affecting the less massive stars as a result of multi-body dynamical interactions. Different age estimates also point toward an age close to 1.0 Ma, indicating that the dynamical interactions took place very shortly after massive star formation. Well-defined expanding stellar clusters have been observed before, but none are as young as this one. If we include all of the stars, the initial mass function is top heavy, but if we discard the ejected ones, it becomes nearly canonical. Therefore, this is another example (in addition to the previous one we found – the Bermuda cluster) of (a) a very young cluster with an already evolved present day mass function (b) that has significantly contributed to the future population of free-floating compact objects. If confirmed in more clusters, the number of such compact objects may be higher in the Milky Way than previously thought. Stock 18 has a variable extinction with an average value of R5495 higher than the canonical one of 3.1. We have discovered a new visual component (Ab) in the GLS 13 370 system. The cluster is above our Galactic mid-plane, likely as a result of the Galactic warp, and it has a distinct motion with respect to its surrounding old population, which is possibly an influence of the Perseus spiral arm.
A 100 kpc ram pressure tail trailing the group galaxy NGC 2276
Authors: Roberts I. D. , van Weeren R. J. , de Gasperin F. , Botteon A. , Edler H. W. , Ignesti A. , Matijević L. , Tomičić N.
Published: June 2024

We present the discovery of a 100 kpc low-frequency radio tail behind the nearby group galaxy, NGC 2276. The extent of this tail is a factor of ten larger than previously reported from higher-frequency radio and X-ray imaging. The radio morphology of the galaxy disc and tail suggest that the tail was produced via ram-pressure stripping, cementing NGC 2276 as the clearest known example of ram-pressure stripping in a low-mass group. With multi-frequency imaging, we extract radio continuum spectra between ∼50 MHz and 1.2 GHz as a function of projected distance along the tail. All of the spectra are well fit by a simple model of spectral ageing due to synchrotron and inverse-Compton losses. From these fits we estimate a velocity of 870 km s−1 for the stripped plasma across the plane of the sky, and a three-dimensional orbital velocity of 970 km s−1 for NGC 2276. The orbital speed that we derive is in excellent agreement with the previous estimates from an X-ray shock analysis, despite the completely independent methodology.
Spectral analysis of three hot subdwarf stars: EC 11481-2303, Feige 110, and PG 0909+276
Authors: Landstorfer A. , Rauch T. , Werner K.
Published: June 2024

Context. For the precise spectral analysis of hot stars, advanced stellar-atmosphere models that consider deviations from the local thermodynamic equilibrium are mandatory. This requires accurate atomic data to calculate all transition rates and occupation numbers for atomic levels in the considered model atoms, not only for a few prominent lines exhibited in an observation. The critical evaluation of atomic data is a challenge because it requires precise laboratory measurements. Ultraviolet spectroscopy of hot stars with high resolving power provide such “laboratory” spectra.

Aims. We compare observed, isolated lines of the iron group (here calcium to nickel) with our synthetic line profiles to judge the accuracy of the respective oscillator strengths. This will verify them or yield individual correction values to improve the spectral analysis, that is the determination of, for example, effective temperature (Teff) and abundances.

Methods. To minimize the error propagation from uncertainties in Teff, surface gravity (𝑔), and abundance determination, we start with a precise reanalysis of three hot subdwarf stars, namely EC 11481-2303, Feige 110, and PG0909+276. Then, we measure the abundances of the iron-group elements individually. Based on identified, isolated lines of these elements, we compare observation and models to measure their deviation in strength (equivalent width).

Results. For EC 11481–2303 and Feige 110, we confirmed the previously determined Teff and log 𝑔 values within their error limits. For all three stars, we fine-tuned all metal abundances to achieve the best reproduction of the observation. For more than 450 isolated absorption lines of the iron group, we compared modeled and observed line strengths. Considering the uncertainty of the analysis and evaluation procedure, an upper limit for the uncertainty of the underlying atomic data was established.

Conclusions. We selected strong, reliable isolated absorption lines, which we recommend to use as reference lines for abundance determinations in related objects.
Effect of mineral fertilizers on quality and storability of potatoes
Authors: Spiridonov Anatolij , Racheeva Anna , Stepanova Natalja , Kondrat'ev Vitalij , Fedorova Rita , Kostko Inna , Vzdornova Veronika
Published: June 2024

Potato is one of the most valuable crops in world agriculture. Potato quality and its storability during storage are influenced by many factors: growing conditions: moisture, heat and light supply, variety features, mineral nutrition. We studied the influence of variety and fertilizers on the quality and storability of tubers in the conditions of North-West Russia. Potato varieties of foreign selection of different maturity dates, suitable for processing into "crispy potatoes" (chips, french fries, potato grits), released in the region, were used as an object of research. The doses of complex mineral fertilizers and microfertilizers, their effect on yield, technological qualitative and biochemical parameters of potato tubers served as the subject of research. The study was carried out under the conditions of field experiment and laboratory. Data on the influence of variety and fertilisers on quantitative and qualitative indicators of potato tuber yield and their safety during long-term storage were obtained. The comparative response of potato varieties of different groups of rapid maturity to variants of dosage of complex mineral fertilizers by formation of yield and qualitative composition of tubers has been established. The use of complex mineral fertilizers Green-Go 18-18-18+1.3 Mg0+micro and the REXOLIN ABC microfertilizers on different groups of potato varieties at maturity dates is effective and leads to an increase in yield and quality of production. The studied forms of mineral fertilizers have a positive effect on the biochemical composition of potato tubers: the content of dry matter in tubers increases, as well as starch and reducing sugars.
The digital transformation concept of sustainable development in dairy cattle breeding
Authors: Fedorova Marina
Published: June 2024

Dairy cattle breeding is a strategically important sub-sector for ensuring food security in Russia, respectively, the sustainable development of the sub-sector is a global task of the Russian economy. Nowadays, it is possible to identify a variety of factors that are dependent and independent of commodity producers, affecting the sustainable development of dairy cattle breeding. Within the framework of the digital agriculture project being implemented in Russia, the systemic and integrated application of digital innovations of industry importance should be considered as the primary factors affecting, first of all, the economic stability of the subsector. The importance of the digital transformation of dairy cattle breeding is undeniable and requires closer study, including from the perspective of forming the concept of digital transformation within the framework of its sustainable development, that is, considering three areas of sustainability: economic, social and environmental.
Influence of drop on the ultrastructure lipid composition of liver hepatocytes of pregnant rats
Authors: Tuychieva Dilfuza , Mirkhamidova Parida , Alimova Rano , Shakhmurova Gulnara , Shakhmurova Gulnara
Published: June 2024

The influence of a toxic agent on the structure of the liver is inevitable. Of interest are the effects of pesticides on intrauterine formation and their teratogenic and embryotoxic properties. The influence of teratogens may manifest itself at different levels of organization of a living organism, and some aspects of cell metabolism change. Using advanced electron microscopy techniques combined with modern knowledge of membranology and toxicology, we conducted a detailed study of morphological changes in the subcellular architecture of the liver after repeated dropplet exposure. Ultrastructural studies were carried out on pregnant rats and their embryos on the 3rd, 13th, 19th days of pregnancy and embryonic development. Poisoning of animals with the pesticide dropp causes clear degenerative processes in the cellular and subcellular structures of the liver.
Analysis and synthesis of the process of fondant formation in the production of sweets with fondant cases containing amaranth seed processing products
Authors: Khasanova Svetlana , Skobelskaya Zinaida , Gins Murat
Published: June 2024

Sweets with fondant cases make up a significant part of the assortment of sugary confectionery products produced in our country. The solution of "narrow" issues of technology is possible by changing the chemical composition of sweets due to the introduction of powder semifinished products into the formulation. Amaranth meal powder is a product of meal processing - sanitary and benign waste in the production of seed oil, which is formed in significant quantities. To introduce a new component into the lipstick formulation, the meal was thermally treated in the IR spectrum and ground to a powder with an average particle size of no more than 20-25 microns with a dispersion of at least 92%. Specially prepared amaranth meal powder, having a high specific surface area, causes instant supersaturation in the syrup and a reduction in the latent period of sucrose crystallization, which in turn leads to rapid structure formation and compression of the technological flow in time. Embedding in the technological flow of the stages of preparation of amaranth meal powder and introduction into syrup involves an advanced processor approach to management. The processor approach in flow management should ensure not only a high-quality exchange of information between subsystems, but also eliminate the isolation of all sections and components of the technological line. An important part of process management and their improvement is the calculation of the integrity of the flow through the experimental determination of the stability of individual subsystems. The purpose of this work was to evaluate the effect of a new component of the formulation of amaranth meal powder on: the leading process of the flow - fondant formation; the integrity of the technological flow.
Analytical methods and tools for business process optimization
Authors: Fedorova Natalya , Panfilov Ilia , Moiseeva Elena , Degtyareva Ksenia , Markovskaya Ella
Published: June 2024

This article is a study of the existing management structure and organizational structure of the operation department at a trucking company. The purpose of the study was to identify the uneven distribution of workload among employees and to develop an ideal business process model to optimize the work of the department. Using the methods of business process analysis, the main functions and their labor intensity were identified and the workload of the staff was calculated. After implementing the proposed changes based on the ideal business process model, there is a significant equalization of employee workload and a decrease in the total labor intensity of functions. The obtained results indicate an increase in the efficiency of the operation department and optimization of the use of enterprise resources.
Environmental safety as a problem of modern legal regulation in the sphere of agro-industrial complex
Authors: Krygina Irina , Rodina Maria
Published: June 2024

The proposed article concretizes the problems of environmental safety in modern conditions, associated with both macro-level problems due to causes. As a rule, they are either man-made and natural, occurring in the world, or micro-level in nature, associated either with the activities of a particular state or a separate region. The article analyzes the goals, objectives and strategy of state policy in the field of environmental safety of the Russian state and individual regions. The authors focus on the sociocultural component of environmental safety, since it is the latter that involves the optimized impact of human activity on resources, ecosystems, and nature in general: transformative activities (production and labor), household activities, economic activities of economic entities and households - from the consumption of natural resources, their processing to their disposal and storage of waste. The purpose of the study is to provide a regulatory and legal analysis that provides counteraction to threats to the environmental security of the state in modern conditions and the formation of a cultural and legal environment through appropriate environmental competencies, which will give a cumulative multiplier effect to countering challenges and threats to the environment and land use.
Hazard identification and occupational risk management of a tractor driver at an agricultural production
Authors: Staseva Elena , Kuzheleva Marina , Pushenko Sergey
Published: June 2024

The profession of an agricultural tractor driver is one of the most common professions in agriculture. There is a high level of occupational injury rates among machinists and drivers of vehicles, which is associated with dangerous and difficult working conditions and the specifics of the work. The purpose of the study is to identify hazards and assess occupational risks in the workplace. The scientific objective of the study is to improve the safety of tractor drivers based on the methodology of assessment and management of occupational risks. Based on the results of identification of risk-forming factors in the workplace, the work presents a register of hazards, the results of an assessment of occupational risks before and after measures to reduce the impact of hazards. The obtained data of the conducted research can be used for all similar jobs in agricultural production. The comprehensive approach proposed in the work to the assessment and management of occupational risks is aimed at improving the labor protection system, increasing the protection of employees, prevention and prevention of injuries at work.
Smart farming: Monitoring and management of wastewater system
Authors: Kireeva Olga , Boikova Galina
Published: June 2024

The paper substantiates the need to develop an information system that enables the monitoring of all processes related to the collection, transport, filtration and use of wastewater from farms of any profile. Such farms use water to carry out their activities, which subsequently becomes polluted and dangerous for the environment. Depending on the degree of pollution, the rules and means of utilization of such water are determined. The developed concept of the information system allows to monitor the condition of the equipment, the level of pollution, to make recommendations on the current maintenance. The application of the methods of analysis and synthesis allowed to define the requirements to the functional capabilities and categories of users of the information system. Application of the objectoriented design method to the obtained results allowed to create a prototype of the graphical user interface of the software product.
Traditional technique application v/s YOLOv5 model for marine underwater objects detection by computer vision method
Authors: Mavrin Sergey , Mavrin Alexander , Mikhaylova Alla
Published: June 2024

The paper compares the effectiveness of two methods application for detecting and recognizing micro-objects in an aqua environment on the example of plankton using neural networks and various technologies and developed in different programming languages. At first the traditional detection method was investigated and applied based on the extraction of Gabor and multilayer perceptron features, realized in MATrixLABoratory (MATLAB) language. Secondly, YOLOv5 (an acronym for ‘You only look once’), as a single-stage neural network was used which was implemented in Python language. The results of the work of these methods for the plankton detection are presented. Accuracy and completeness metrics are calculated to determine best of two methods. Images with the recognition result, programmatically calculated performance metrics were obtained after using the detection methods. The study was conducted on the effectiveness of method applications for realtime recognition using short video images. In conclusion it is stated that the YOLOv5 model has shown significant superiority over the traditional method in the task of detecting marine objects, in particular plankton. Its accuracy was 30% higher; the completeness of object detection was 27% higher.
Improving energy efficiency of monomer production units through direct process integration
Authors: Gil Tatiana , Kuznetsov Maxim , Kuvardina Evgeniya
Published: June 2024

One of the urgent problems today is the increased energy consumption in the industrial sector. This negatively affects the ultimate cost of the product and also leads to increased anthropogenic impact on the environment. Industrial-territorial clusters have extensive utility networks, which transfer heat between plants, so the development of methods to reduce their energy consumption will solve this problem. This paper presents a systematic approach to assessing the possibility of direct process integration of plants belonging to the same industrial-territorial cluster to maximize heat recovery. The determination of process flows used for direct process integration can be made based on the territorial location of plants and the availability of space for new heat exchange equipment and piping, and the maximum potential for heat recovery can be estimated using a composite curve graph. The study analyzes monomer production and assesses the potential for reducing energy consumption through direct process integration of pyrolysis and gas separation units, which amounted to 7.3 MW and can only be achieved with process integration. The total reduction in energy consumption with joint intraand direct process integration is 66.7 MW. This also leads to a reduction in CO2 emissions of 140,152 t/year.
A mathematical model to attract investments for power supply in the Republic of Uzbekistan
Authors: Fayziev Rabim , Kurbonov Feruz , Mirzoev Akmal
Published: June 2024

The article analyzes the impact of structural transformations and attraction of investments in improving the power supply of the Republic of Uzbekistan, the correlation-regression dependence of net profit received from income before taxation and income tax on the generated electricity by the enterprises of the energy system of the Republic of Uzbekistan for 2005-2020 and developed proposals for its improvement. The analysis focuses on the econometric model of this process and establishes the indicators of net profit obtained by supplying electricity to accomplish the task.
Utilizing Big Data in digital marketing strategies for the energy sector
Authors: Al-Ababneh Hassan Ali
Published: June 2024

The main goal of the study is the constructive formalization of the main aspects of big data in digital marketing of companies in the energy sector. With the help of constructive analysis, criticism and scientific generalization, the essence of the concept of “big data” is argued, the key characteristics, types and tasks within the framework of business implementation in digital marketing of companies in the energy sector are structured. The main functions and tasks of big data in the context of companies’ digital marketing strategy are highlighted. It has been proven that in modern business conditions, big data must be consumer-oriented and are an integral part of the digital marketing strategy of companies in the energy sector. Big data is conceptualized as a key innovative tool for online brand advertising in the context of digital marketing. The findings provide a theoretical framework and framework for the study of big data as part of its implementation in the digital marketing strategy of companies in the energy sector. The developed recommendations can be applied in practice for the business implementation of Big Data digital marketing strategies for companies in the energy sector in order to ensure the achievement of business goals.
Leveraging digital technologies for brand promotion and communications in digital marketing strategies in the energy sector
Authors: Dalbouh Mahmud Agel Abu , Al-Husban Ahmad Mohammad , Siam Ibrahim Mahmoud , Alqudah Hamza
Published: June 2024

The purpose of the study is to determine the role of digital technologies in the digital marketing model of modern companies in the energy sector as part of establishing communications and promoting brands. The dynamics of the development of digital technologies in the world and their popularization in the strategic planning of companies in the energy sector are outlined. The types and features of digital technologies are substantiated, with an emphasis on the process of building communications and promoting company brands in the energy sector. It is argued that to ensure the effectiveness of digital marketing for companies in the energy sector, it is necessary to use various digital channels of interaction. The tools of digital technologies (websites, online services and digital marketing) are highlighted, which can be basic for establishing communications and planning the promotion of brands of energy companies. The main stages and advantages of communications and brand promotion using digital technologies have been formed. The obtained research results have their practical value, which lies in the justified role of digital technologies in the digital marketing strategy for organizing effective brand promotion and building business processes and communications with the target audience of companies in the energy sector.
Plant genetic resources for the development of priority areas of breeding
Authors: Zolkin Alexander , Matvienko Evgeny , Pankratova Lyubov , Eriashvili Nodari , Koval Yulia
Published: June 2024

In this article it is noted that N.I. Vavilov, a gifted Russian geneticist, botanist and breeder, made an invaluable contribution to the development of world science of plant genetic resources. These advances provide valuable tools for dealing with the challenges of the modern world and make it possible to preserve and utilize the wealth of genetic potential of the plant world for the benefit of humanity. A very important aspect of working with genetic resources is the creation and maintenance of collections that serve as sources of valuable genes, alleles and polygenic systems. These collections are unique ranges of plant seeds, tissues and DNA collected from around the world. They serve as the basis for breeding work, making it possible to improve existing varieties and create new, more stable and productive ones.
Dynamics of sulfur absorption by marble during combustion of layered brown coal charge
Authors: Kislov Vladimir , Tsvetkova Yuliya , Zaichenko Andrey , Podlesniy Dmitry , Tsvetkov Maxim , Salgansky Eugeny
Published: June 2024

The change of the elemental composition of a layered charge consisting of particles of sulfur brown coal and marble during oxidation in a furnace heated to 1200°C has been studied. It has been determined that as coal burns out, the sulfur was released into the gas phase and partially absorbed by marble. At the final oxidation temperature (1200°C), approximately 5% of the initial sulfur content remains in the coal, about 40% was absorbed by the marble, and the remaining 55% passes into the gas phase.
Eco-branding and consumer behavior: Innovative marketing strategies in ecology and environmental sciences
Authors: Kulikova Elena , Kondratenko Ilya
Published: June 2024

In the contemporary marketplace, eco-branding emerges as a pivotal strategy for aligning consumer behavior with environmental sustainability goals. The scientific article explores the dynamic interplay between eco-conscious branding initiatives and consumer purchasing decisions. This exploration is grounded in the premise that effective ecobranding not only enhances brand loyalty and market share but also fosters a deeper consumer commitment to sustainability practices. Utilizing a multidisciplinary approach, the article examines case studies of successful eco-brands, analyzing the marketing strategies that these brands employ to communicate their environmental values and the impact of these strategies on consumer behavior. Key findings suggest that transparency, authenticity, and a clear demonstration of environmental impact are critical components of successful eco-branding. Additionally, the article discusses the role of social media and digital marketing in amplifying the reach and influence of eco-brands. By identifying the mechanisms through which eco-branding can shape consumer preferences and behaviors, this article contributes valuable insights for businesses seeking to drive sustainable consumption and for policymakers aiming to promote environmental awareness through consumer markets.
Fractal representations in image processing of remote sensing of the earth
Authors: Khudaiberdiev Mizaakbar , Khan Igor , Tojiboyev Bobomurod , Achilov Bahodir
Published: June 2024

This article explores the application of fractal representations in the image processing of remote sensing data for Earth observation. Fractals, with their self-similar properties and complex patterns, offer a powerful mathematical framework for analyzing the intricate structures found in natural landscapes. The study highlights the advantages of using fractal-based methods over traditional image processing techniques, particularly in capturing the multifaceted textures and irregularities of Earth’s surface features. By leveraging fractal geometry, enhanced accuracy in the classification and interpretation of remote sensing images is achieved. This approach facilitates better monitoring and understanding of environmental changes, land use patterns, and natural disasters. The findings underscore the potential of fractal representations to significantly improve the quality and efficacy of remote sensing image analysis, providing a robust tool for Earth science research and practical applications in environmental management.
Risk Factors, Antithrombotic Management, and Long-Term Outcomes of Patients Undergoing Endovascular Treatment of Unruptured Intracranial Aneurysms
Authors: Xiang Yanxiao , Zhang Ping , Lai Yongjie , Wang Donghai , Liu Anchang
Published: June 2024

Background Patients receiving endovascular treatment for unruptured intracranial aneurysms (UIAs) face varying risks and benefits with antithrombotic management. This study aimed to evaluate the perioperative and long-term effects of antithrombotic strategies, identify the populations that would benefit, and explore the predictive factors affecting the long-term outcomes.

Methods UIA patients undergoing endovascular treatment including stent-assisted coiling or flow diversion between June 2019 and June 2022 were enrolled. We compared perioperative and long-term complications between tirofiban and dual antiplatelet therapy groups. Optimal candidates for each antithrombotic treatment were identified using multivariate logistic regression. Nomograms were developed to determine the significant predictors for thromboembolic complications during follow-up.

Results Among 181 propensity-score matched pairs, the tirofiban group showed a trend toward a lower rate of thromboembolic complications than the DAPT group without elevating major bleeding risk in either period. Homocysteine (Hcy) level ≥10 μmol/L was a significant independent factor associated with thromboembolic complication in both periods. Subgroup analysis highlighted that in patients with high Hcy levels, tirofiban and sustained antiplatelet treatment for ≥12 months were protective factors, while a history of stroke was an independent risk factor for thromboembolic events in follow-up. Four variables were selected to construct a prognostic nomogram, history of hypertension, prior stroke, Hcy level, and the duration of antiplatelet therapy.

Conclusion Perioperative low-dose tirofiban and extended antiplatelet therapy demonstrated a favorable trend in long-term outcomes for UIA patients with preoperative Hcy levels ≥10 μmol/L undergoing endovascular treatment. The prognostic model offers reliable risk prediction and guides antithrombotic strategy decisions.
Synthesis of Methoxy Analogues of Coenzyme Q10 Metabolites from Parsley Seed Extracts via Baeyer–Villiger Rearrangement of Carbonyl-Substituted Polyalkoxybenzenes
Authors: Semenov Victor V. , Demchuk Dmitry V. , Adaeva Olga I. , Tsyganov Dmitry V. , Nasyrova Darina I. , Dolotov Roman A. , Muravsky Еgor А. , Varakutin Alexander E. , Samet Alexander V.
Published: June 2024

Based on the parsley seed main component, apiol, efficient approach to polymethoxyquinone C3- and C4-acids was developed. The key step of this approach is Baeyer–Villiger rearrangement of carbonyl-substituted polyalkoxybenzenes derived from parsley seed extracts. These acids are the MeO-analogues of natural antioxidants – metabolites of ubiquinone and idebenone. Due to antioxidant properties, they are the potential therapeutic candidates for the treatment of mitochondrial dysfunction.
Are Sleep Quality, Daytime Sleepiness and Depression Associated with Knee Pain? A Cross-Sectional Study in Older Adults
Authors: Kakazu Viviane Akemi , Pinto Rafael Z. , Dokkedal-Silva Vinicius , Fernandes Guilherme Luiz , Araujo Cynthia Gobbi Alves , Pires Gabriel Natan , Dias Tayná A. , Tufik Sergio , Andersen Monica , Morelhao Priscila K.
Published: June 2024

Introduction Osteoarthritis (OA) is common among older adults, and studies have suggested that it is commonly associated with sleep problems and depression. However, the results are inconsistent concerning overall sleep quality, daytime sleepiness, and depression in studies that consider OA knee pain specifically.

Objectives To examine the relationship between sleep quality, daytime sleepiness and depression, and OA knee pain in older adults.

Methods This was a cross-sectional study. Adults aged 60 and above with OA knee pain according to the National Institute for Health and Care Excellence (NICE) guidelines, and who had preserved cognitive function were recruited. Sleep quality, daytime sleepiness, and depression symptoms were assessed using the Pittsburgh Sleep Quality Index (PSQI), the Epworth Sleepiness Scale (ESS), and the Center for Epidemiologic Studies Depression Scale (CESD), respectively. The generalized linear model (GzLM) approach was used in the statistical analysis. A logistic regression model was performed to evaluate whether ESS, PSQI, and CESD symptoms were associated with knee pain.

Results The sample comprised 451 older adults. Sleep quality (OR = 1.22, 95% confidence interval [CI]: 1.07 to 1.40) and depressive symptoms (OR = 1.09, 95%CI: 1.01 to 1.17) were associated with knee pain, but there was no association with excessive daytime sleepiness (OR= 1.09, 95%CI: 0.90 to 1.20).

Conclusions Sleep quality and depression symptoms are associated with knee pain.
Patient Perspective on Disease Burden and Gene Therapy for Hemophilia A and B: The “Haemvolution for Patients” Italian Survey
Authors: Mansueto Maria Francesca , Bigi Sarah , Follino Marco , Lupi Angelo , Coppola Antonio
Published: June 2024

Hemophilia is a rare X-linked congenital bleeding disorder due to a deficiency of factor VIII (hemophilia A [HA]) or factor IX (hemophilia B [HB]). Replacement and nonreplacement treatments are available but have limitations. Gene therapy (GT) provides an effective, long-term, single-dose treatment option, now approaching clinical practice. This study aimed to understand patient perspectives on GT for HA and HB in Italy using a qualitative questionnaire distributed through Italian patient associations, addressing patient views on daily life, treatments, unmet needs, quality of life (QoL), and GT for hemophilia. In total, 141 participants had HA, and 14 had HB (severe 78.6%). Daily life was most affected by pain and/or joint function limitations (57.5% of participants), high infusion frequency (42.5%), management of breakthrough bleeding episodes (40.3%), and anxiety/fear of severe or sudden bleeding (38.8%). Despite current treatments, about half of the participants experienced three or more annual bleeding episodes. Most participants knew of GT (87.2%) and expected improvements in QoL (60.5%), reduced frequency of current treatments (53.5%), and a permanent cure (49.1%); 46.4% were unaware of its once-off dosage and 46.4% were not concerned about the costs they anticipated to be associated with GT. Although several fears were reported, 25.0% of participants were willing to undergo GT with the support of a multidisciplinary team. This survey provided valuable insight into patient perspectives on hemophilia and GT in Italy. Overall, relevant proportions of patients still experience limitations affecting their daily life. Most were positive about GT and anticipated improvements in their clinical outcomes and QoL.
Total Anomalous Pulmonary Venous Connection with Rare Direct Right Atrial Drainage and Unprecedented Array of Coexistent Multisystem Variations
Authors: Sharma Arun , Garg Dollphy , Arya Shivali , Naganur Sanjeev Hanumantacharya , Singhal Manphool
Published: June 2024

Total anomalous pulmonary venous connection (TAPVC) is anomalous drainage of all pulmonary veins into systemic circulation. The intracardiac type typically entails the drainage of all the pulmonary veins into the right atrium, via the coronary sinus. The connection of the pulmonary veins directly into the right atrium is exceptionally rare and has been primarily reported with right atrial isomerism. Herein, we presented a remarkable case of TAPVC in a 10-year-old male child, distinguished by an unconventional drainage of all the pulmonary veins directly into the right atrium, with normal coronary sinus and absent right atrial isomerism. Intriguingly, computed tomography imaging revealed a combination of incredibly rare coexistent pulmonary, vascular, and skeletal anomalies. These anomalies included absence of pulmonary fissures in the right lung, presence of left circumflex aortic arch with bovine branching pattern, bilateral cervical ribs, and C7 vertebral fusion anomalies. To our knowledge, this unique combination of coexistent anomalies has not been previously reported in scientific literature in the background of rare drainage pattern of TAPVC.
State Capacity of Secret Surveillance
Authors: Duncan Thomas K. , Goodman Nathan P.
Published: June 2024

The state capacity-civil society tradeoff model tends to treat the “state” and “civil society” as separate entities who move to constrain one another. However, this modeling technique leaves out the nuances of individual action within a collective setting by treating each as a relative black box. This article explores this balance in the context of the surveillance state that has arisen in the 20th and 21st century. As state capacity in surveillance increases it better allows the state to respond to threats to citizens from citizens. However, the increased capacity also lessens the ability of societal pressure to check authoritarian advances even in a nation with a thriving civil society presence.
The paradigm of magnetic molecule in quantum matter: Slow molecular spin relaxation
Authors: Sirenko Valentyna , Bartolomé Usieto Fernando , Bartolomé Juan
Published: June 2024

The quantum nature of single-ion magnets, single-molecule magnets, and single-chain magnets has been manifested among other phenomena by magnetic hysteresis due to slow spin relaxation, competing with fast quantum tunneling at low temperatures. Slow spin relaxation, described by Arrhenius-type law with the effective barrier energies Ueff = 50 cm–1, was discovered 3 decades ago in paramagnetic Mn12-acetate complex of oxy-bridged mixed-valence manganese ions, below the blocking temperature TB = 3 K. In contrast to common magnetic materials, it is governed primarily by magnetic anisotropy, set by zero-splitting of spin states of a magnetic ion in a field of ligands, and spin-lattice coupling. The emerging studies on the border of coordination chemistry, physics of spin systems with reduced dimensionality, and nanotechnologies, were performed in search of routes for enhancement of Ueff and TB characteristics, in line with increase of operation temperature and quantum correlation time, mandatory for quantum applications. The best results with TB ∼ 80 K and Ueff ∼ 1261 cm–1, were obtained for DyIII single-ion magnet, so far. Numerous excellent research and review articles address particular activities behind this achievement. It follows, that present challenges are dictated by the rational development of novel, smart magnetic molecules, featured by butterfly cores, cyano-bridges, 2D metal-organic frameworks, and metal-free graphene nanoclusters, as well as stable free radicals, magnetized by spare electrons. These species are briefly considered here with respect to the unique experience of international collaborative activity, established by Prof. Juan Bartolomé.