bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Use of the Self-Selected Rest Interval Method Is as Effective for Optimizing Postactivation Performance Enhancement in Elite Athletes as Employing the Best Fixed Rest Interval
Authors: Fontanetti Gabriel , Barreto Renan V. , Junior Rubens C. , Marangoni Victor , Denadai Benedito S. , Greco Camila C. , Lima Leonardo C. R. 
Published: January 2025

Abstract
Fontanetti, G, Barreto, RV, Junior, RC, Marangoni, V, Denadai, BS, Greco, CC, and Lima, LCR. The use of the self-selected rest interval method is as effective for optimizing postactivation performance enhancement in elite athletes as employing the best fixed rest interval. J Strength Cond Res XX(X): 000–000, 2024—This study investigated whether the adoption of a self-selected recovery interval (SSI) is more effective than the use of a fixed recovery interval (FRI) to elicit postactivation performance enhancement (PAPE). Ten male professional volleyball athletes (20.6 ± 1.5 years; 92.8 ± 4.9 kg; 195 ± 8 cm) participated in 3 experimental sessions, in random order, following familiarization with countermovement jump (CMJ) exercises and determination of the load for 5-repetition maximum (5RM: 146 ± 27 kg) squat exercise. The 3 experimental sessions consisted of (a) control session (CON), with measurement of CMJ height 4 minutes before and 2, 4, 6, 8, and 10 minutes after subjects rested while sitting in a chair without performing any preactivation (PA) protocol; (b) session with FRI, with measurement of CMJ height 2, 4, 6, 8, and 10 minutes after performing a PA exercise consisting of 5 squats with 5RM load; and (c) session with SSI, with evaluation of CMJ height once after performing the PA adopting a SSI based on a readiness scale. No significant differences were found between CMJ height in the CON session. Countermovement jump height was higher (p < 0.05) than the baseline measurement at minutes 4, 6, and 8 post-PA in the FRI session, for the best CMJ performance during the FRI session, and after the PA in the SSI session. No significant differences were found between the heights of the best CMJ in the FRI session (49.2 ± 6.8 cm) and post-PA in the SSI session (49.6 ± 6.6 cm). Therefore, adopting FRI and SSI is equally effective in eliciting PAPE in elite athletes. Despite being as effective as adopting FRI to elicit PAPE, SSI is more intuitive and easily applicable in contexts where PAPE can be implemented.
Argumentation resource in scientific pedagogy as an object of research
Authors: Korzhuev A. V. , Lesnichuk S. A. , Kontarov N. A. , Ikrennikova Yu. B. 
Published: January 2025

Introduction. The analysis of the argumentation employed by scientists and educators in recent years reveals a tendency to adopt an uncritical attitude towards the opinions of scientific authorities, as well as distortions in the formulation of definitions and inaccuracies in both theoretical and empirical justifications of conclusions. These issues indicate attempts at methodological “interference” within the argumentative discourse in science education. Aim. The present research aims to identify the specifics of scientific argumentation in pedagogy and categorise the criteria for its compliance with the methodological framework into two parts: the formulation of “strict” and “soft” requirements. Methodology and research methods. The following research methods were employed: analysis of recordings of scientific dialogues, as well as texts from articles, monographs, and dissertations on pedagogy to assess argumentative correctness; analysis of methodological literature addressing the issues of argumentation across various fields of knowledge; and a method for dividing the field of scientific argumentation into two categories based on the characteristics of the subject of pedagogical research, including the potential for definition and the construction of theoretical frameworks. Results. The outcome of the study is the identification of the requirements for scientific arguments in pedagogy, shaped by the unique characteristics of its subject area. These requirements can be categorised into two types: “strict” requirements, which should be aspired to, and “soft” requirements, which can be described as mitigating circumstances that assist pedagogical researchers in addressing criticisms arising from comparisons between pedagogical argumentation and analogous processes in other scientific disciplines. Scientific novelty. The scientific novelty of this research lies in the justification for dividing the field of argumentation – an essential component of pedagogical methodology – into “hard” and “soft” criteria that align the arguments of scientific pedagogy with methodological norms. Practical significance of the results lies in the potential to utilise the presented material as educational content for students enrolled in pedagogical education programmes, serving as a guide for completing their final qualifying works.
Statistical study of regional differences in the educational potential of the population
Authors: Dolgikh E. A. , Pershina T. A. 
Published: January 2025

Purpose: of the presented research is to characterize the educational potential of the population based on an integrated assessment of educational activities and the material, technical and information base of education in the subjects of the Russian Federation.Methods: the work used tabular and graphical methods of data representation, grouping, methods for calculating integral indicators, as well as the method of correlation and regression analysis.Results: the article examines the concept of the "educational potential" and systematizes it’s defining indicators. The characteristics of the main target indicators characterizing educational activities and the material, technical and information base of education in the subjects of Russia are given. The authors present the integral indicators characterizing educational activities and the material, technical and information base of education. On the basis of the integral indicator characterizing educational activity and determining the indicator of educational performance – the share of the employed population aged 15 years and older with higher education in the total number of employed population, the regression model is constructed. According to the results of the comparison of the integral indicators characterizing educational activities and the material, technical and information base of education in the regions of Russia, the leading and lagging subjects were identified. According to these indicators, the multidimensional grouping has been developed that characterizes the lag of subjects from the national average based on the values of the generalizing indicators.Conclusions and Relevance: the compiled ratings of the subjects of the Russian Federation on the integral assessment of the educational potential of the population can become the basis for the development of differentiated measures aimed at stimulating the development of education, as well as for evaluating the effectiveness of the implementation of relevant regional programs. The study of the Index of Educational activity and the index of the material, technical and information base of education will allow us to identify problem regions according to certain characteristics of education, since they can affect certain elements of the field of education. This will enable the Ministry of Science and Higher Education of the Russian Federation to respond more quickly to problems in this area in the regional context.
Partnership of key stakeholders in the use of generative artificial intelligence
Authors: Izmailova M. A. 
Published: January 2025

Purpose: is to substantiate the need to improve the partnership between the state, business, universities and civil society in the field of generative artificial intelligence.Methods: the research is based on the application of theoretical and empirical analysis methods, including: logical, retrospective, generalization, modeling, comparison, statistical, observation, data visualization.Results: the article provides arguments confirming the relevance of generative artificial intelligence by its key stakeholders. The necessity of developing models of institutional interactions for building the new format of stakeholder interaction based on the principle of partial intersection of their institutional spheres of influence, coupled with the urgent demands of civil society, is substantiated. The analysis of the reasons for the interest of the state and business in using solutions based on artificial intelligence in their activities is carried out. Special attention is paid to the attitude of universities to the responsible introduction of generative artificial intelligence into the scientific and educational environment and its use in the solving educational and professional tasks. The improved model of partnership between the state, business, universities and civil society in the field of generative artificial intelligence is proposed.Conclusions and Relevance: partnership in the field of scientific and technological progress allows us to take into account the interests and needs of its key stakeholders, as well as emerging opportunities for them to develop a new role status in the development and use of generative artificial intelligence. The recommended partnership model of key stakeholders allows for the aggregation of financial and production resources of business, competencies and scientific potential of universities in joint projects to develop solutions in the field of development and use of generative artificial intelligence, which can give a significant synergistic effect if this collaboration is complemented by state participation. Inclusion in the model of civil society will ensure that its requests for the preservation of universal values are combined in decisions on the use of generative artificial intelligence and will give a human-centered character to scientific and technological progress in the context of digitalization of society.
Stages of managing the structural transformation of regional entities based on the mechanism of public-private partnership
Authors: Kirillova E. A. , Rysin D. O. , Merkushev S. A. 
Published: January 2025

Purpose: of the presented article is to formulate the main stages of solving the key tasks of managing the structural transformation of production and economic systems based on the specifics of modern conditions and trends in their changes.Methods: within the framework of this study, the set of methods was used: factual, causal, structural analysis, generalization, comparison, logical method.Results: based on the analysis of the specifics of modern environmental conditions, changes in the subjects of industrial and economic activity and the system of their interactions, three key tasks of managing their structural transformation were formulated. The proposed stages of the implementation of the structural transformation management process at the present stage, priority for each of these management tasks, are described. The implementation of the identified tasks in the conditions of the described specifics is proposed to be carried out on the basis of the mechanism of innovative public-private partnership.Conclusions and Relevance: analysis of the specifics of modern industrial and economic entities, their communication systems and relationships, as well as trends in their changes has shown an increased need for targeted coordinated innovative development of domestic industrial production due to the sanctions restrictions. At the same time, the impossibility of expediting these structural transformations is justified without mobilizing the efforts of all participants in the regional production and economic system. The coordinating and guiding role of government agencies as active participants in these changes is highlighted. To ensure the implementation of innovation processes localized within the country, it is proposed to rely on the mechanism of innovative public-private partnership. Relying on the results of the intellectual activity of such a mechanism will contribute to the alignment of the system participants. This requires a transition from the one-time operational practice of creating innovative solutions to the organization of their creation, implementation and diffusion as a single cyclical flow.
Tennis Serve Speed in Relation to Isokinetic Shoulder Strength, Height, and Segmental Body Mass in Junior Players
Authors: Vacek Jan , Vagner Michal , Malecek Jan , Stastny Petr 
Published: January 2025

Objectives: The relationship between isokinetic maximal strength of internal or external shoulder rotation and serve speed in tennis is well-established, yet the influence of segmental mass, height, and high-speed shoulder rotation strength on serve performance in junior players remains unclear. This study aimed to investigate the relationship between concentric or eccentric isokinetic shoulder strength, segmental mass, height, and first-serve speed aimed at the T-target zone. Methods: Fifteen male junior competitive tennis players (mean ± SD: age 15.9 ± 0.9 years; height 180.1 ± 7.2 cm; body mass 66.1 ± 5.7 kg) were assessed for maximal isokinetic strength during concentric and eccentric internal and external shoulder rotations. Segmental mass (arm, leg, and trunk) was measured using dual-energy X-ray absorptiometry, and serve speed was recorded using a radar gun. Results: Concentric shoulder rotations at 210°/s demonstrated significant positive correlations with serve speed for both external (ρ = 0.71, p ≤ 0.01) and internal rotation (ρ = 0.61, p ≤ 0.05). Although lean arm mass partially mediated the relationship between shoulder strength and serve speed (indirect effect = 0.502, 95% CI: −0.156 to 1.145), this mediation effect was not statistically significant. Height was moderately correlated with serve speed (ρ = 0.68, p ≤ 0.01) but did not moderate the relationship between shoulder strength and serve speed. Conclusions: Concentric shoulder strength at higher angular velocities and segmental mass contribute to serve speed in junior tennis players. While height provides structural advantages, strength and lean mass play important roles, emphasizing the need for targeted training programs.
DEVELOPMENT OF A LOADING TRAINING TOOL TO TRAIN WATER POLO JUMPS AND SHOTS BASED ON WATER BACK SPIDER (WBS)
Authors: Manzilina Sarah , Sukur Abdul , Hartono Fajar Vidya 
Published: January 2025

Penelitian ini bertujuan untuk mendapatkan data ilmiah tentang pengembangan alat latihan beban cabang olahraga polo air untuk meningkatkan hasil latihan lompatan dan tembakan pada atlet polo air. Sampel diambil berjumlah 20 atlet polo air yang telah berusia 16 tahun yang tergabung didalam pemusatan latihan daerah DKI Jakarta. Data dikumpulkan menggunakan kuisioner. Data kemudian dianalisis dengan menggunakan metode R&D dengan pendekatan kuantitatif. Berdasarkan uji hasil kelayakan oleh ahli terdapat nilai 98% pada efektifitas alat, 95% pada fungsi alat dan 75% pada desain alat. Berdasarkan uji reabilitas instrument menggunakan formula Kuder dan Richardson 21 (KR 21), sedangkan uji validitas untuk pilihan ganda menggunakan korelasi poin biserial. Pengujian reabilitas menggunakan SPSS terdapat nilai Cronch’s Alpha kuisioner uji efektifitas alat pembebanan berbasis water back spider (WBS) pada uji reabilitas adalah 1,48610103. Uji efektifitas diperoleh rerata pre-test 8,90 dan post-test 16,00 dengan standar deviasi 1,210 serta 1,747. Terdapat pada tabel uji-t dengan taraf signifikansi 0,05 memiliki Sig. (2-tailed) 0,001. Hasil p-value Sig. (2 – Sided) < 0,05, maka alat pembebanan berbasis water back spider (WBS) dapat meningkatkan hasil lompatan dan juga tembakan secara signifikan.
This study aims to obtain scientific data on the development of water polo weight training tools to improve the results of jumping and shooting training for water polo athletes. Samples were taken totaling 20 water polo athletes who were 16 years old who were members of the DKI Jakarta regional training camp. Data was collected using a questionnaire. The data was then analyzed using the R&D method with a quantitative approach. Based on the feasibility test results by experts there is a value of 98% on the effectiveness of the tool, 95% on the function of the tool and 75% on the tool design. Based on the instrument reliability test using the Kuder and Richardson 21 (KR 21) formula, while the validity test for multiple choice uses biserial point correlation. Reliability testing using SPSS there is a Cronch's Alpha value for the effectiveness test questionnaire for the water back spider (WBS) based loading tool in the reliability test is 1.48610103. The effectiveness test obtained a mean pre-test of 8.90 and post-test of 16.00 with a standard deviation of 1.210 and 1.747. The t-test table with a significance level of 0.05 has Sig. (2-tailed) 0.001. The p-value result of Sig. (2 - Sided) <0.05, then the water back spider (WBS) based loading tool can significantly improve jumping and shooting results.
Keywords: Water Polo, Jump, Shot.
DEVELOPMENT OF A FOOTBALL PASSING LEARNING MODEL FOR JUNIOR HIGH SCHOOL STUDENTS
Authors: Alparis Lutvi 
Published: January 2025

Abstract The aim of this research is to produce a product in the form of Developing a Football Passing Learning Model for Class Middle School Students. Analyze the process of developing a soccer passing learning model for class students, analyze the feasibility of the learning model, and assess its effectiveness. It is hoped that this research will produce a model that is not only suitable for use, but also effective in improving soccer Passing skills in class junior high school students. In its development, it uses the ADDIE method, which includes the Analysis, Design, Development, Implementation, and Evaluation stages. The research sampling technique used in this study was 108 students. Data analysis uses effectiveness test analysis of the Football Passing model that was developed. Based on test data analysis, it is known that the pretest average is 24.2221 and the posttest is 39.7352. Then the researcher carried out a paired sample test to determine the level of significance of the model given to the subject. Stating that the significance level is 0.000 < 0.05, it can be concluded that the development of a soccer passing learning model can significantly improve student learning outcomes to be applied in the soccer passing learning process. The results of the pretest and posttest also showed significant results.
Phytochemicals Analysis and Antioxidant (IC50) Value of Dried and Fresh Mangrove (Rhizopora racemosa) Leaves Extract for Herbal Drink Base
Authors: Adi Prayitno Sutrisno , Utami Dwi Retnaningtyas , Putri Silvy Novita Antrisna 
Published: January 2025

The use of mangrove leaves as a functional ingredient is associated with secondary metabolites such as steroids, saponins, tannins, phenols, flavonoids, antioxidants, magnesium, sodium, potassium and calcium. This research determined the total phenol content (TPC), total flavonoid content (TFC) and antioxidants (IC50) in dry and fresh mangrove leaf infusion extracts. The method used was infusion extraction. The materials used are fresh mangrove leaves and dried leaves (dried in the oven). The data obtained then discussed descriptively based on the average obtained in the calculations. The research results showed that the type or condition of leaves used has an influence on TPC, TFC and Antioxidants (IC50). Oven drying can produce higher levels of secondary metabolites compared to fresh leaf infusion (TPC, 36 mg GAE/g; TFC 4.12 mg QE/g; IC50 225,706 ppm). Dried leaf extraction has better potential in producing secondary metabolic compounds and antioxidants. The choice of extraction method and type of solvent is highly recommended for further research objectives, because it suits research interests. It is recommended that when making functional drinks (tea) from mangrove leaves, to add other sources of ingredients such as dried lemon or mint leaves so that the resulting flavor is fresher and provides a better linking assessment of preferences.
Hybrid Graph Learning Reconstructs Global Ocean Oxygen Spatiotemporal Changes
Authors: Wang Xinbing , Lu Bin , Han Luyu , Zhao Ze , Qi Haonan , Gan Xiaoying , Qu Lixin , Zhou Yuntao , Zhou Lei , Fu Luoyi , Jin Meng , Zhou Chenghu , Zhang Jing 
Published: January 2025

Abstract

Climate change and anthropogenic activities have exacerbated hypoxic conditions in the global ocean, threatening marine ecosystems and earth sustainability. Investigating the history of ocean deoxygenation is crucial for developing coping strategies. However, due to the severe sparse in-situ observations and spatiotemporal complexity of deoxygenation mechanism, precise modelling of the oxygen trends, especially in large scale, remains a long-standing problem. Here we propose Jingwei, a hybrid graph learning framework that integrates observation data and ocean climate model in a complementary manner, accurately reconstructing global oxygen levels over the past six decades. A knowledge retrieval module is designed to learn the hidden laws that dominate the complex mechanism of oxygen changes from model-based simulations. Constrained by those laws, a knowledge propagation module spatiotemporally connects the sparse data, capturing dynamic and spatial heterogeneous oxygen loss. With a joint consideration of invariant laws and variant factors, Jingwei significantly reduces reconstruction error, achieving equal accuracy with the dense cruise surveys. It can quantitatively trace the expansion process of oxygen minimum zones (OMZ), revealing potential drivers, effectively supporting on-target strategies. We foresee that the implications of such a graph-based hybrid framework extend beyond ocean deoxygenation and pave way for next-generation earth system modelling.
Methanol storage in high-pressure clathrate hydrates as a prolonged source of methane in large ocean worlds
Authors: Pakhomova Anna , Journaux Baptiste , Kurnosov Alexander , Ballaran Tiziana Boffa , Tobie Gabriel , Hanfland Michael 
Published: January 2025

Abstract

Large ocean worlds in the solar system and in other planetary systems likely contain significant fraction of volatile and organic compounds, which condition their habitability potential. Some of these compounds are known to combine with water molecules to form clathrate hydrates under pressure. However, the clathration process in complex compositions and under high pressures representative of these ocean worlds still remain unexplored. Herein we report on the first experimental results on the characterization of the pressure-induced transitional pathway of a mixed clathrate hydrate. We studied crystalline compounds forming in two systems: binary tetrahydrofuran (THF)-H2O that served as a reference system, and ternary THF-methanol (MeOH)-H2O in order to address the role of methanol at high-pressure. We show that high pressure facilitates the incorporation of methanol in clathrate structure, with formation of two mixed clathrate hydrates, THF•xMeOH•17H2O (sII) and THF•0.75MeOH•10H2O. The preferential trapping of methanol at high-pressure offers an explanation for the non-detection of methanol on surfaces of large ocean worlds, while more common on small icy worlds. Moreover, the hydrogenolysis of enclathrated primordial methanol into methane presents a novel hypothesis for the deep-seated endogenic source of methane in Titan and potentially for other ocean worlds.