bluuebunny/crossref_metadata_2025_split huggingface dataset:
МЕТОД КОЛЛОКАЦИИ ДЛЯ УРАВНЕНИЯ КДФ-КАВАХАРЫ НА ОСНОВЕ ТРИГОНОМЕТРИЧЕСКОГО БАЗИСА B-СПЛАЙНОВ ПЯТОЙ СТЕПЕНИ
Authors: КАРААГАЦ Б. , ЭСЕН А. , ОВОЛАБИ К.М. , ПИНДЗА Е. 
Published: October 2024

В данной работе рассматривается эффективный численный метод - метод коллокации - для получения численных решений уравнения КдФ-Кавахары. Численный метод основан на конечно-элементной формулировке и сплайн-интерполяции на основе тригонометрического базиса B-сплайнов пятой степени. Сначала уравнение КдФ-Кавахары распадается на связанное уравнение с использованием вспомогательной переменной вида υ=uxxx. Затем метод коллокации применяется к связанному уравнению вместе с разностью вперед и формулой Кранка-Николсона. Благодаря этому мы получаем систему алгебраических уравнений в терминах переменных времени и на основе тригонометрического базиса B-сплайнов пятой степени. Для определения ошибки между численным и точным решениями вычисляются нормы ошибки L2 и L∞. Результаты иллюстрируются на двух численных примерах с их графическим представлением и сравнением с другими методами.
In this paper, an efficient numerical method which is a collocation method is considered in order to obtain numerical solutions of the KdV-Kawahara equation. The numerical method is based on a finite element formulation and a spline interpolation by trigonometric quintic B-spline basis. Firstly, the KdV-Kawahara equation is split into a coupled equation via an auxiliary variable as υ=uxxx. Subsequently, a collocation method is applied to the coupled equation together with the forward difference and the Cranck-Nicolson formula. This application leads us to obtain an algebraic equation system in terms of time variables and trigonometric quintic B-spline basis. In order to measure the error between numerical solutions and exact ones, the error norms L2 and L∞. are calculated successfully. The results are illustrated by means of two numerical examples with their graphical representations and comparisons with other methods.
ИССЛЕДОВАНИЕ СВЕРХЭКСПОНЕНЦИАЛЬНОГО РОСТА СРЕДНЕГО ПОТОКА ЧАСТИЦ В СЛУЧАЙНОЙ РАЗМНОЖАЮЩЕЙ СРЕДЕ
Authors: ЛОТОВА Г.З. , МИХАЙЛОВ Г.А. 
Published: October 2024

Для эффективного численно-аналитического исследования сверхэкспоненциального роста среднего потока частиц с размножением в случайной среде вводится новая корреляционно-сеточная аппроксимация однородного изотропного случайного поля плотности. Сложность реализации траектории частицы при этом не зависит от корреляционного масштаба. Для сеточной аппроксимации случайного поля ограниченной плотности обоснована возможность гауссовской асимптотики средней скорости размножения. Она обеспечивает суперэкспоненциальный рост потока в некотором начальном интервале времени. На основе тестовых расчетов построена оценка дальнейшего сверхэкспоненциального роста потока.
A new correlative-grid approximation of a homogeneous and isotropic random density field is introduced for the effective numerically-analytical investigation of overexponential growth of the mean particles flux in a random medium with multiplication. In this case the complexity of the particle trajectory realization is not dependent on the correlation scale. For the correlative-grid approximation the possibility of a Gaussian asymptotics of the mean particles multiplication rate is justified for a random field of bounded density. It ensures a superexponential growth of the flux in some initial time interval. An estimate of further overexponential flux growth is constructed based on some test computations.
ПОИСК НАИЛУЧШИХ КУБАТУРНЫХ ФОРМУЛ НА СФЕРЕ, ИНВАРИАНТНЫХ ОТНОСИТЕЛЬНО ГРУППЫ ВРАЩЕНИЙ ИКОСАЭДРА
Authors: ПОПОВ А.С. 
Published: October 2024

Описывается процесс поиска наилучших (в некотором смысле) кубатурных формул на сфере, инвариантных относительно преобразований группы вращений икосаэдра. Даются с 16-ю значащими цифрами параметры всех наилучших кубатурных формул данного вида симметрии до 30-го порядка точности. Приводится таблица, содержащая основные характеристики всех наилучших на сегодняшний день кубатурных формул группы вращений икосаэдра до 79-го порядка точности.
A process of searching on the sphere for the best (in a sense) cubature formulas that are invariant under the transformations of the icosahedral rotation group is described. The parameters of the best cubature formulas of this symmetry type up to the 30th order of accuracy are given to 16 significant digits. A table which contains the main characteristics of all the best to date cubature formulas of the icosahedral rotation group up to the 79th order of accuracy is given.
О СВОЙСТВАХ РАЗНОСТНЫХ СХЕМ ДЛЯ РЕШЕНИЯ НЕЛИНЕЙНО-ДИСПЕРСИОННЫХ УРАВНЕНИЙ ПОВЫШЕННОЙ ТОЧНОСТИ. I. СЛУЧАЙ ОДНОЙ ПРОСТРАНСТВЕННОЙ ПЕРЕМЕННОЙ
Authors: ФЕДОТОВА З.И. , ХАКИМЗЯНОВ Г.С. 
Published: October 2024

Построена разностная схема типа предиктор-корректор для решения нелинейно-дисперсионных уравнений волновой гидродинамики с повышенным порядком аппроксимации дисперсионного соотношения, основанная на расщеплении исходной системы уравнений на гиперболическую систему и скалярное уравнение эллиптического типа. Выполнен диссипативный и дисперсионный анализ новой схемы, получено условие ее устойчивости, выписана и проанализирована формула для фазовой ошибки. Найдены параметры, при которых достигается одинаковый порядок точности фазовых характеристик разностной схемы, аппроксимируемой ею нелинейно-дисперсионной модели и полной модели потенциальных течений.
A difference scheme of the predictor-corrector type is constructed for solving nonlinear dispersion equations of wave hydrodynamics with a high order of approximation of the dispersion relation, based on splitting of the original system of equations into a hyperbolic system and a scalar equation of the elliptic type. A dissipation and dispersion analysis of the new scheme is performed, a condition for its stability is obtained, and a formula for the phase error is written and analyzed. Parameters are found at which the phase characteristics of the difference scheme, the nonlinear-dispersive model approximated by it, and the full model of potential flows have the same order of accuracy.
Stan gospodarski rolnych swe wschodniej Litwie w tak zwanym okresie „Litwy Šrodkowej" i początek realizacii reformy rolnej
Authors: Kankevičius Artūras 
Published: October 2024

After the end of Lucjan Zeligowsky's „revolt," so-called „Middle Lithuania" government was established, which was ostensibly independent from Warsaw policy. When the military operations were over, the situation inside the country was extremely critical. The economy of Eastern Lithuania, the base of which was agriculture, was completely ruined. New authority in 1921 had started partial reconstruction of the country's agriculture owing to the help of Warsaw. The attempts were made to provide farmers with seeds, necessary equipment, also to gain the pre-war number of cattle in Eastern Lithuania. The lack of land, radical slogans from the East made the question of land structure reform important. The land reform had to stabilize the country's inside situation. In spite of the formal situation in the Middle Lithuania, the decree of General Lucjan Zeligowsky „Concerning the question of land reform" was declared. The decree, repeating the main principles stated in the Polish laws, was more peasant in its essence. Agrarian councils were established in the Middle Lithuania, the main task of which became the parceling of large landownership. The parcelling of land took place in two directions: the state estates were being parcelled, and alongside this, the parcelling of private large landownership took place under control of Land departments. In 1922, 17,440 dessiantines of land area were distributed in plots. 1009 plots were formed, the buyers of which became the countrymen of the nearest villages. The fact that the owners of the new plots became landless and poor peasants was not less important. The works of dividing villages into individual farms and the liquidation of servitudes were begun. The results gained in this field were poor. The laws of the Middle Lithuania land reforms had great importance on the further development of agrarian relationships in Eastern Lithuania. This reform was different in its essence not only from the laws of the Republic of Poland but also prevented the establishment of laws devoted to the Kresy.
Aerobic capacity of healthy young men associated with muscle oxygen extraction rate of the vastus lateralis muscle
Authors: Takeda Hiromichi , Tabira Kazuyuki , Yamamoto Wakana , Matsuoka Koume , Horie Jun 
Published: October 2024

AbstractPurposeThe determinants of aerobic capacity are oxygen delivery by the cardiopulmonary system and oxygen extraction by the skeletal muscles. However, the impact of the oxygen extraction capacity of the skeletal muscle is unclear. This study aimed to examine the associations between aerobic capacity; muscle strength, endurance, mass, and quality; and oxygen extraction capacity.MethodsTwenty-seven healthy young men (mean age, 20.7 ± 0.8 years; body mass index, 21.6 ± 3.2 kg m−2) were recruited. The following parameters were determined: peak work rate (WR) and oxygen uptake (O2) corrected for body mass using the cardiopulmonary exercise testing; muscle strength and endurance using isokinetic muscle testing; muscle mass using bioelectrical impedance; muscle quality (muscle echo intensity) using an ultrasound imaging device, and muscle oxygen extraction rate (MOER) using near-infrared spectroscopy. Multiple regression analysis was performed using WR/kg peak and O2/kg peak as dependent variables and each assessment index as an independent variable.ResultsMultiple regression analysis with WR/kg peak as the dependent variable resulted in the adoption of SMI (β = −0.41, P = 0.036), muscle echo intensity (β = −0.45, P = 0.012) and ΔMOER (β = 0.73, P < 0.001) as significantly associated factors. Multiple regression analysis with O2/kg peak as the dependent variable resulted in ΔMOER (β = 0.65, P = 0.001) being adopted as a significantly associated factor.ConclusionThese findings suggest that muscle oxygen extraction rate is associated with aerobic capacity. MOER is a useful indicator because it is not affected by body mass.
Electrodeposition of Ni-WC composite coatings: formation, structure and properties
Authors: Petukhova Polina M. , Bushueva Evdokiya G. , Novgorodtseva Oksana N. , Kizimov Vladislav D. 
Published: October 2024

Currently, electroplating is actively developing, and one of its promising areas is the study of composite electrochemical coatings (CEC). They are of great interest to the industrial sector, especially for mechanical engineering, due to their unique properties. CEC contain microscopic particles as additives that can significantly improve coating properties such as hardness and wear resistance. This is especially important for the manufacturing of high-quality parts of industrial mechanisms. These areas can lead to new advances in the development of better and more durable materials. In this work, composite coatings of nickel-tungsten carbide were obtained by the method of electrodeposition. The deposition was carried out in a sulfuric acid electrolyte with different concentrations of tungsten carbide. Formation of composite coatings was carried out at a concentration of dispersed particles in a sulfate electrolyte of 10 g/L. The coatings have no pores or cracks. Nickel and tungsten carbide phases were detected in the coatings by X-ray phase and micro-X-ray spectral analyses. Inclusions of WC in the nickel matrix lead to an increase in the microhardness of the coating by 10–15 times. Wear resistance was assessed under dry sliding friction with reciprocating motion; a decrease in the volume of worn material by 2–3 times was noted when tungsten carbide was added into the nickel matrix.
Floating mora affixation in Huozhou diminutive subtraction
Authors: Yang Yifan 
Published: October 2024

This paper argues for an item-and-arrangement approach by demonstrating that the diminutive form in Huozhou Chinese results from the affixation of a floating mora. Diminutives in Huozhou Chinese are formed by deleting the final non-vocalic segment of a syllable, along with some subsegmental changes (e.g., [pʰɑŋ35] ‘plate’, [pʰaː35] ‘plate.DIM’). This paper provides a detailed description of these patterns and proposes that the underlying representation of the diminutive morpheme is a floating mora, with subtraction serving as a repair strategy for this floating mora affix. This paper makes two main contributions. First, it introduces new data on subtractive morphology. Second, it provides a formal analysis and further supports this proposal from a typological perspective, thereby supporting the item-and-arrangement approach to morphology. Overall, by combining a case study of Huozhou Chinese with a typological discussion, this analysis shows that nonconcatenative morphology can be interpreted as additive, leading to a more economical grammar and more restrictive predictions.
Serve Dynamics: Applying a Bibliometric Approach in the Kinetics and Kinematics Analysis for Flat and Topspin Serves in Tennis
Authors: Kumar Sunil , Das Ratna , Bairagi Kushagra , Singh Malkhan 
Published: October 2024

Objectives. The study aimed to completely examine the existing research on the investigation of kinetics and kinematics analysis for flat and topspin serves in tennis, with a special focus on improving performance and reducing injury risks for players.
Material and Methods. In order to obtain a comprehensive understanding of the data, Scopus searched three variables in each record: (1) the author’s name, (2) the journal name in which the paper was published, and (3) the total number of citations. Bibliometric analysis was used as part of the analysis. To gain a thorough and accurate comprehension, the data was analyzed and interpreted using a variety of data triangulation techniques. Building distance-based co-occurrence networks for bibliometric analysis and synthesis was carried out using the VOS viewer software. The classification and grouping of the terms derived from titles, abstracts, and keywords were carried out based on their degree of interconnectedness. The terms “Serve Dynamics in Tennis”, “Kinetic Analysis in Tennis serve”, “Kinematic Analysis in Tennis serve”, and “Flat and Topspin serve in Tennis” are frequently used in the study, although their meanings are generally interpreted differently. The search yielded 125 papers and 2807 citations, which were used in the study conducted from 2001 to 2024.
Results. The study’s findings revealed the primary authors, countries, and subject areas that contribute to a comprehensive understanding of research patterns, influential studies, authorship dynamics, thematic clusters, and international collaborations in the analysis of the kinetics and kinematics for flat and topspin serves in tennis.
Conclusions. The study concludes by consolidating current information and identifying potential avenues for broadening the interdisciplinary scope of tennis serve research.
Scientometrics Analysis of Global Researches on Anemia
Authors: Khaledi Hedye , Makkizadeh Fatemeh , Hazeri Afsaneh 
Published: October 2024

Background: Anemia is a condition in which the number of red blood cells or the hemoglobin concentration within them is lower than normal. This study aims to show the intellectual structure of knowledge regarding anemia and gives a comprehensive and up-to-date image of research in this area.
Materials and Methods: This is a descriptive-analytical study with a scientometric approach. The PubMed database was searched for research publications indexed under "anemia" including 8484 records between 2011 and 2020. Data were analyzed using Co-word analysis, clustering methods, and strategic diagrams with the help of SPSS and Ucinet 6 software.
Results: The keyword “Anemia Sickle Cell” and two pairs of frequently used keywords, namely “Anemia, Iron *Iron” were the most frequent in the research area. The results shaped the concepts of anemia in 9 clusters. The clusters "Hydroxyurea and sickle cell anemia", "Fetus transfusion", "Management of Thalassemia Major", "Hemolytic Uremic Syndrome", "Management and Control of Anemia", "Chronic Kidney Failure and Anemia", "Hematopoietic Stem Cell Transplantation" are topics that may be emerging or disappearing. The “Thalassemia and blood transfusion" are immature clusters.
Conclusion: This study uses co-word networks that indicate important links between keywords of the research areas. Most research approaches are in the therapeutic aspects. Despite the importance of the effect of anemia on all levels of society, including economics, education, and other types of anemia, as well as its impact on learning and mental disorders, these subjects have not been given sufficient consideration.
Pattern of Adverse Drug Reactions and Performed Monitoring Laboratory-Tests in Patients Receiving Anti Tuberculosis Treatment in an Endemic Region, Zabol
Authors: Moradi Mandana , Khazayee Marziyeh , Sepehri Zahra 
Published: October 2024

Background: Efficient anti TB treatment considered crucial globally. Anti TB drugs can cause various adverse drug reactions (ADRs). Clinical and laboratory monitoring will decrease rate of these ADRs, improve patient safety as well as drug adherence and treatment outcome.
Methods: In this cross-sectional study total of 136 newly diagnosed TB patients were included. All patients received standard anti-TB 4 drug regimen. Predesigned data collection forms were used to gather patient’s lab data as well as clinical symptoms they experienced during treatment course. Monthly follow up visits or phone calls were also performed by investigators and all health issues were recorded.
Results: The majority of our patients aged over 70-year-old. About 54% of them were female. We recorded at least one ADR in 80.8% of patients, and hepatic-gastrointestinal (GI) ADRs ranked first (64.7%). Although ADRs were more common in women and patients over 70-year-old, but there was no statistically significant relationship between sex or age and rate of ADRs (P> 0.05). We also observed that recommended baseline laboratory tests for monitoring anti TB treatment was not performed in any of our patients, except complete blood count (CBC) that was performed in 11 cases. This led to diagnoses of anemia and thrombocytopenia in one case.
Conclusion: The majority of our patients experienced ADR. Recommended drug monitoring tests that could guarantee safe and effective treatment were not performed routinely in our TB management centres. These facts highlighted the importance of improving surveillance system for TB management based on national standards.
Exploring Factors Affecting Breastfeeding: Insights From Hispanic and Black Mothers and Healthcare Providers in El Paso, Texas
Authors: O’Neil Dara , Santana Adela , Enderle Joan , King Laura 
Published: October 2024

Objective:Breastfeeding has been shown to have many health benefits to both the infant and the mother. However, there are racial and ethnic disparities in breastfeeding rates across all U.S. states and territories. This study sought to understand the support needed to improve breastfeeding rates and address disparities in El Paso County, Texas using the socioecological model framework for analysis.Methods:We conducted focus groups involving 16 Hispanic and Black mothers. During these sessions, we asked them about the environmental and social factors that influenced their decisions to either start or stop breastfeeding. Additionally, we interviewed six health professionals to gain insights into the support activities they provide to breastfeeding women and identify potential gaps in care.Results:The study found several themes that align with prior research on breastfeeding support: (a) Breastfeeding is recognized as being healthy, but misconceptions exist about formula. (b) Some mothers find public breastfeeding or pumping inappropriate, but opinions vary. (c) Family members significantly influence the decision to breastfeed; their support varies. (d) Although aid from healthcare professionals (HCPs) in breastfeeding is appreciated and valued, it is not always available. (e) HCPs are not uniformly perceived as knowledgeable or helpful, occasionally providing conflicting information. (f) Prenatal classes featuring breastfeeding are appreciated, but the depth of information provided varies. (g) Women seek increased postdischarge support from hospitals. (h) The transition back to work introduces various challenges. (i) Community norms and attitudes toward breastfeeding can be unsupportive. (j) Demand exists for updated, accessible local breastfeeding resources. (k) The Special Supplemental Nutrition Program for Women, Infants, and Children is valued, but there is confusion about services and eligibility requirements. (l) Undocumented immigrants might hesitate to access public services due to concerns about their status.Conclusions:Breastfeeding support programs should take into account the cultural context, the influence of healthcare providers, and the availability of community support. Addressing these aspects can be key to promoting breastfeeding and reducing disparities in breastfeeding rates.
The Artists’ Association branches of Revolutionary Russia: experience of interaction with regions
Authors: Bakaryagin S. S. 
Published: October 2024

Importance. The activities of the Artists’ Association branches of Revolutionary Russia (1922–1932) are considered. During this period, the organization had a significant and sometimes decisive place in the artistic life of the country. The subject of the study relates to the culture of the country as a whole and touches on local history issues. The purpose of the work is to assess the influence of the central organization on the local branches development and analyze their importance in the Association work.Materials and Methods. The research is based on materials from the Russian State Archive of Literature and Art, the State Archive of the Yaroslavl Region and published memoirs of participants in the events. In the course of the work, the biographical method is used, as well as historical-genetic and historical-comparative methods traditional for historical science.Results and Discussion. It is noted that the Association participants paid great attention to the creation of representative offices at the local level. The presence of artistic traditions in a particular region played an important role in the development of local branches of the AARR. At the same time, established traditions are not the determining factor. The presence of a bright creative personality in it, who set a certain pace of work, could be of significant importance in the development of a particular branch.Conclusion. It is revealed that some of the regional branches ceased their activities even before the liquidation of the AARR. Despite this, the work of branches of the Artists’ Association of Revolutionary Russia contributed to the accessibility of art for the local population, attracting regional residents to artistic life and preserving cultural monuments. Museums and creative studios are created, and active exhibitions and lectures are carried out.