Article
Computer Science, Artificial Intelligence
Saikat Sarkar, Dipti Prasad Mukherjee, Amlan Chakrabarti
Summary: This work presents a method for evaluating ball possession statistics in soccer matches by monitoring the start and end of passing events. The method improves accuracy by detecting object split and merge events for pass detection.
PATTERN RECOGNITION
(2022)
Article
Multidisciplinary Sciences
Artur Avelino Birk Preissler, Pedro Schons, Filipe Manuel Clemente, Guilherme Droescher de Vargas, Lucas Moraes Klein, Ana Filipa Silva, Hadi Nobari, Luiz Fernando Martins Kruel
Summary: The evolution of female soccer is related to high-intensity actions and choosing abilities that characterize players' performance. This study aimed to analyze the correlations between performance in sprint and change-of-direction tests in professional female soccer players. The results showed significant correlations between sprint performance with and without the ball, as well as between sprint tests without the ball and change-of-direction tests.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Yunyun Xu, Qian Shi, Kui Huang, Yang Yang
Summary: A soccer-ball-shaped DNA origami framework was assembled to direct liposome growth, with cholesterol moieties as nucleation seeds. Optimal nucleation seed number for well-templated and uniform liposomes was found to be around 30 with relatively even spatial distribution. The study discusses seed arrangement principles and effects, along with liposome formation mechanisms, revealing key factors for designing and optimizing 3D DNA nanoframes for functional liposome production.
Article
Chemistry, Analytical
David Eager, Karlos Ishac, Shilei Zhou, Imam Hossain
Summary: The study successfully reproduces the knuckleball effect in soccer using a smart ball system and shows that the trajectory changes are smaller compared to professional games.
Article
Computer Science, Artificial Intelligence
Matteo Borghesi, Lorenzo Dusty Costa, Lia Morra, Fabrizio Lamberti
Summary: This study investigates the use of Temporal Convolutional Networks (TCNs) to extract ball possession information from tracking data, which is a crucial step for tactical analyses. Performance evaluation on professional soccer games data shows that the proposed method outperforms state-of-the-art rule-based methods, achieving 86.2% accuracy in possession estimation (+7.3% compared to the state of the art) and 89.2% accuracy in dead-alive classification (+33.2% compared to the state of the art).
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Astronomy & Astrophysics
J. J. Relancio
Summary: This work explores the connection between the geometry of a multiparticle system and the modification of a particle's metric due to the presence of others. It shows how a curved momentum metric can arise from considering particles involved in an interaction and how the principle of relative locality in doubly special relativity can be achieved in a geometric framework. This formalism also allows for the generalization of this principle in the presence of spacetime curvature and the definition of new momentum dependent space-time coordinates for a multiparticle system.
Article
Mathematics, Applied
Erika Hanaoka, Taizo Sadahiro
Summary: This paper investigates a sliding block puzzle, known as the 5-puzzle, defined on a 2x3 grid. The main objective is to demonstrate a geometric property of the graph representing the transitions of the 5-puzzle positions. By identifying each position with its 180 degrees rotation and applying path contractions, the soccer ball graph is obtained.
DISCRETE APPLIED MATHEMATICS
(2023)
Article
Computer Science, Information Systems
Samriddha Sanyal
Summary: A probabilistic framework for pass prediction in soccer was proposed, integrating two dependent models designed from abstract top-view visualization of player coordinates. The proposed method outperformed recent approaches and ground truth in a soccer dataset, demonstrating noticeable advantages.
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
(2021)
Article
Sport Sciences
Alberto Rabano-Munoz, Luis Suarez-Arrones, Bernardo Requena, Jose Asian-Clemente
Summary: Based on this study, differences in internal and external load, positional requirements, and neuromuscular fatigue were analyzed between Soccer-7 and Soccer-11.
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
(2023)
Article
Sport Sciences
Andrea Riboli, Marco Semeria, Giuseppe Coratella, Fabio Esposito
Summary: This study found significant differences in the most demanding passages of match play and 1-min peak demand among players in different positions in elite soccer, providing insights for bridging the gap between training and matches.
Article
Psychology, Multidisciplinary
Pedro Figueiredo, Andre Seabra, Marta Brito, Marta Galvao, Joao Brito
Summary: This study investigated the relative age effect (RAE) in youth soccer and futsal players in Portugal, finding a more pronounced RAE in male soccer players, especially in younger age categories and clubs with higher certification levels.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Endocrinology & Metabolism
Michael W. Schwartz, James S. Krinsley, Chelsea L. Faber, Irl B. Hirsch, Michael Brownlee
Summary: Relative hypoglycemia is a complication of diabetes where the glycemic threshold for detecting and responding to hypoglycemia increases. This problem is clinically relevant because higher blood glucose in the intensive care unit is associated with higher mortality in patients without diabetes but lower mortality in patients with preexisting diabetes. The impairment of glucose-sensing process in the brain may contribute to the increased mortality risk associated with standard glycemic management of critically ill patients with diabetes.
Article
Psychology, Multidisciplinary
James H. Dugdale, Allistair P. McRobert, Viswanath B. Unnithan
Summary: The study found that there is a significant relative age effect among male youth soccer players in Scottish development and performance levels, but not at the amateur level. Additionally, the relative age effect was observed in players aged U12 to U17.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Engineering, Mechanical
Lizhong Xu, Xianmiao Yang
Summary: A novel planar ball reducer based on a rolling bearing is proposed to eliminate the high relative velocity that decreases operation efficiency. The new reducer significantly reduces relative velocity and increases meshing efficiency compared to the classic reducer. Experimental results support the superiority of the novel reducer and the accuracy of the theoretical analysis.
MECHANISM AND MACHINE THEORY
(2021)
Article
Chemistry, Multidisciplinary
Yuki Sakamoto, Masaki Hiratsuka, Shinichiro Ito
Summary: This study investigated the aerodynamic forces of soccer balls with different panel patterns, finding that drag and drag crisis characteristics are dependent on groove length and volume. The panel shape significantly changes the position of the separation point near the critical region, where drag crisis occurs. The effect of panel shape on the separation point position is small in subcritical and supercritical states.
APPLIED SCIENCES-BASEL
(2021)
Article
Astronomy & Astrophysics
Michele Arzano, Jerzy Kowalski-Glikman
Article
Astronomy & Astrophysics
Andrzej Borowiec, Lennart Brocki, Jerzy Kowalski-Glikman, Josua Unger
Article
Astronomy & Astrophysics
Michele Arzano, Jerzy Kowalski-Glikman, Wojciech Wislicki
Article
Astronomy & Astrophysics
Remigiusz Durka, Jerzy Kowalski-Glikman
Article
Astronomy & Astrophysics
M. Arzano, L. Brocki, J. Kowalski-Glikman, M. Letizia, J. Unger
Article
Physics, Particles & Fields
Jerzy Kowalski-Glikman, Jerzy Lukierski, Tomasz Trzesniewski
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Andrzej Borowiec, Lennart Brocki, Jerzy Kowalski-Glikman, Josua Unger
Summary: In this paper, the structure of the algebra of extended BMS symmetries in 3 and 4 spacetime dimensions is discussed, revealing that these algebras contain an infinite number of distinct Poincare subalgebras, a fact previously noted only in the 3 dimensional case. These subalgebras are used to construct an infinite number of different Hopf algebras as quantum deformations of the BMS algebras. Different types of twist-deformations and dual Hopf algebras are also discussed, which could be interpreted as noncommutative, extended quantum spacetimes.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Remigiusz Durka, Jerzy Kowalski-Glikman
Summary: This study investigates the boundary structure of gravity theory formulated as a constrained BF theory, and explores the influence of the cosmological constant and topological terms. The established charges formulas are affected by the presence of the cosmological constant and topological terms. The charges in the AdS-Schwarzschild solution give correct values.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Review
Multidisciplinary Sciences
Michele Arzano, Jerzy Kowalski-Glikman
Summary: This review provides a basic introduction to the kappa-deformed relativistic phase space and free quantum fields, discussing the construction of the kappa-deformed phase space of a classical relativistic particle using Lie bi-algebras and Poisson-Lie groups after reviewing the kappa-Poincare algebra. It also talks about how to construct a free scalar field theory on the non-commutative kappa-Minkowski space associated with kappa-Poincare and demonstrates how the group valued nature of momenta affects field propagation.
Article
Physics, Particles & Fields
Andrzej Borowiec, Jerzy Kowalski-Glikman, Josua Unger
Summary: This paper studies the quantum group deformations of the infinite dimensional symmetry algebra of asymptotically AdS spacetimes in three dimensions, classifies all possible Lie bialgebra structures and explicitly constructs related Hopf algebras. It is found that some incarnations of K-Poincare cannot be extended consistently to infinite dimensional algebras, but certain deformations may have potential physical applications when considering subalgebras.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Remigiusz Durka, Jerzy Kowalski-Glikman
Summary: In this article, we study two BF formulations of gravity, Plebanski theory and MacDowell-Mansouri theory, which both have a negative cosmological constant. While both theories give the standard Einstein equations in the bulk, they differ in the expressions of edge charges. We explicitly compute the asymptotic charges for AdS-Schwarzschild, AdS-Kerr, and AdS-Taub-NUT solutions, and we find that the charges diverge in Plebanski theory but are finite in MacDowell-Mansouri theory. Furthermore, we demonstrate that the MacDowell-Mansouri asymptotic charges, action, and symplectic form are all finite for arbitrary asymptotically AdS spacetimes. Therefore, the MacDowell-Mansouri theory of gravity in asymptotically AdS spaces does not require any counterterms.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Laurent Freidel, Jerzy Kowalski-Glikman, Robert G. Leigh, Djordje Minic
Summary: In this essay, a new understanding of the cosmological constant problem is presented, emphasizing the relationship between vacuum energy and entropy. By introducing a UV-IR regularization and combining it with the holographic bound on entropy, a bound on the cosmological constant consistent with observations is derived. This suggests that the universe is large and the cosmological constant is naturally small due to the presence of a large number of degrees of freedom.
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2023)
Article
Astronomy & Astrophysics
Michele Arzano, Jerzy Kowalski-Glikman
Summary: We argue that the concept of identical particles is no longer well defined in quantum systems governed by noncommutative deformations of spacetime symmetries. Such models are characterized by a non-Abelian Lie group in four-momentum space. Our analysis shows that for states containing multiple particles, only the total momentum of the system is a well-defined quantum number, obtained from the non-Abelian composition of individual momenta. We also demonstrate that previous attempts to construct Fock spaces for these models have been unsuccessful due to incorrect assumptions and solve a long-standing problem in the field regarding the covariant nature of momentum quantum numbers under relativistic transformations.
Article
Astronomy & Astrophysics
Jerzy Kowalski-Glikman, Giacomo Rosati
Article
Astronomy & Astrophysics
Laurent Freidel, Jerzy Kowalski-Glikman, Robert G. Leigh, Djordje Minic