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24th IEEE International Conference on Data Mining Workshops, ICDMW 2024

作者： Charytanowicz, Malgorzata Perzanowski, Kajetan Januszczak, Maciej Woloszyn-Galeza, Aleksandra Sobczuk, Maria Kulczycki, Piotr Lublin University of Technology Department of Computer Science Lublin Poland Systems Research Institute Polish Academy of Sciences Warsaw Poland John Paul II Catholic University of Lublin Institute of Biological Sciences Lublin Poland Polish Academy of Sciences Museum and Institute of Zoology Ustrzyki Dolne Poland Warsaw University of Life Sciences Chair of Animal Genetics and Conservation Warsaw Poland AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland

ISBN: (纸本)9798331530631

Spatial distributions of wisents (European bison) Bison bonasus (Linnaeus 1758), were studied in the Bieszczady Mountains (south-eastern Poland) on the basis of telemetric data obtained from two subpopulations: the western - inhabiting the forest districts of Baligród, Komańcza, Cisna and Lesko, and the eastern - dwelling within the districts of Lutowiska, Stuposiany, and in Bieszczadzki National park. Data was collected between 2002-2021. In our study, we propose a novel approach for classifying wisent subpopulations that utilizes machine learning methods and CLC data. For this purpose, the performances of eight algorithms: Naive Bayes, Logistic Regression, Support Vector Machine, Multilayer Perceptron, Random Forest, Extreme Gradient Boosting, k-Nearest Neighbors and Decision Tree were investigated. The algorithms were compared according to the following indicators: accuracy, Cohen's-Kappa, precision, recall and F1 score. Their assessment was enhanced through the application of statistical inference (the Friedman test with post-hoc analysis) and SHAP values. The lowest results were achieved by Naive Bayes and Logistic Regression methods (accuracy of 73.69% and 74.43%, respectively), whilst significantly higher results were achieved by eXtreme Gradient Boosting, k-Nearest Neighbors and Decision Tree classifiers, with the classification accuracy exceeding 90% (91.81%, 92.8%, 93.47%, respectively). Based on the results, we conclude that CLC data represents a valuable source of information regarding the affinity of wisents towards different habitat conditions. © 2024 IEEE.

关键词： Adversarial machine learning

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Charm balance function in relativistic heavy-ion collisions

arXiv

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arXiv 2023年

作者： Parida, Tribhuban Bozek, Piotr Chatterjee, Sandeep Odisha Berhampur760010 India AGH University of Krakow Faculty of Physics and Applied Computer Science aleja Mickiewicza 30 Cracow30-059 Poland

We calculate the balance function for charm in relativistic heavy-ion collisions. The distribution of pairs of charm-anticharm quarks produced in hard processes in the early stages of the nucleus-nucleus collision evolves in the dense fireball formed in the collision. The evolution of the dense matter is described using a relativistic viscous hydrodynamic model and the quark diffusion with a Langevin equation. The evolution of the charm quark balance function from the formation of the charm-anticharm pair up to the freeze-out traces the partial thermalization of the heavy quarks in the dense matter. For the balance function in azimuthal angle we reproduce the collimation effect due to the transverse flow. The evolution in rapidity shows the thermalization of the longitudinal velocity of the quark in the fluid. We provide estimates for the one and two-dimensional balance functions for D0-D¯0 mesons produced in ultarelativistic Pb+Pb collisions at √sNN = 5.02 TeV. The shape of the charm balance function in relative rapidity is sensitive to the rescattering of heavy quarks in the early stages of the collision, while the shape of the balance function in azimuthal angle is sensitive to the rescattering in the latter stages. © 2023, CC BY.

关键词： Heavy ions

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Influence of structural defects on charge density waves in 1T-TaS_(2)

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Nano Research 2023年第8期16卷 11528-11539页

作者： Iaroslav Lutsyk Karol Szalowski Pawel Krukowski Pawel Dabrowski Maciej Rogala Witold Kozlowski Maxime Le Ster Michal Piskorski Dorota A.Kowalczyk Wojciech Rys Rafal Dunal Aleksandra Nadolska Klaudia Toczek Przemyslaw Przybysz Ewa Lacinska Johannes Binder Andrzej Wysmolek Natalia Olszowska Jacek J.Kolodziej Martin Gmitra Takuma Hattori Yuji Kuwahara Guang Bian Tai-Chang Chiang Pawel J.Kowalczyk Faculty of Physics and Applied Informatics University of LodzPomorska 149/15390-236 LodzPoland Faculty of Physics University of WarsawPasteura 502-093 WarsawPoland Faculty of Physics Astronomyand Applied Computer ScienceJagiellonian UniversityLojasiewicza 1130-348 KrakowPoland National Synchrotron Radiation Centre SOLARIS Jagiellonian UniversityCzerwone Maki 9830-392 KrakówPoland Institute of Physics Faculty of SciencePavol JozefŠafárik University in KošicePark Angelinum 904001 KošiceSlovakia Institute of Experimental Physics Slovak Academy of SciencesWatsonova 4704001 KošiceSlovakia Department of Precision Engineering Graduate School of EngineeringOsaka University2-1 Yamada-okaSuita 565-0871Japan Department of Physics and Astronomy University of MissouriColumbiaMissouri 65211USA Department of Physics and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana-ChampaignUrbanaIllinois 61801-3080USA

The influence of intrinsic defects of 1T-TaS_(2)on charge density waves(CDWs)is studied using scanning tunneling microscopy and spectroscopy(STM,STS),angle-resolved photoelectron spectroscopy(ARPES),and density functional theory(DFT).We identify several types of structural defects and find that most have a local character limited to a single CDW site,with a single exception which effectively behaves as a dopant,leading to band-bending and affecting multiple neighboring *** only one type of defect can be observed by STM topographic imaging,all defects are easily resolved in STS *** results indicate modulation of the Mott band gap commensurate with the CDW and breaking of the three-fold symmetry of electronic *** calculations(with included Coulomb interactions)are used to investigate the electronic structure,focusing on both sulfur vacancy and oxygen-sulfur *** sulfur vacancy system,characterized with a metallic behavior,is identified as the origin of one of the experimentally observed ***,the effect of oxidation of 1T-TaS_(2)depends on the substitution site,leading to the heterogeneity of electronic properties.

关键词： structural charge sulfur

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Are You Aroused Enough to See the Difference? The Role of Physiological Arousal in Perceiving Realism of Virtual Scene

Are You Aroused Enough to See the Difference? The Role of Ph...

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2023 IEEE International Symposium on Mixed and Augmented Reality Adjunct, ISMAR-Adjunct 2023

作者： Lipp, Natalia Strojny, Pawel Strojny, Agnieszka Śpiewak, Slawomir Argasiński, Jan Korzeniowski, Przemyslaw Sano Centre for Computational Medicine Kraków Poland Jagiellonian University Faculty of Management and Social Communication Kraków Poland Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Kraków Poland

ISBN: (纸本)9798350328912

Simulation realism is a crucial factor for task performance in virtual reality. The issue is that it does not simply result from a simulation's graphical quality and is often connected to users' expectations and the capacity of the cognitive system. It is assumed that perceived realism may be affected by physiological arousal which is the basis of emotional reactions and of attention prioritizing. The main aim of the presented study is to verify whether perceptual characteristics of a virtual scene - complexity and vividness of virtual objects - affect perceived realism. The secondary aim is to test whether realism assessment changes because of arousal. An experimental study was conducted with 100 participants in total. Four experimental groups differ in terms of the complexity of a virtual scene (i.e., number of objects in the field of view) and vividness of virtual objects (i.e., figure-ground contrast). Participants were asked to perform a task, that was taking on the role of a marshaller and positioning the plane on the airport apron in the virtual reality simulation. During the task, electrodermal activity was measured. After the virtual session, participants assessed perceived realism. Results indicate that the complexity and vividness of virtual scene do not affect perceived realism directly. Physiological arousal (i.e., skin conductance level) is a moderator of the relationship between the vividness of the virtual scene and perceived realism. A high level of arousal increases realism assessment in vivid simulations. © 2023 IEEE.

关键词： Virtual reality

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LSTM Deep Learning Method for Radiation Short and Long-Term Prediction 7th

LSTM Deep Learning Method for Radiation Short and Long-Term ...

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7th International Conference on Smart City Applications, SCA 2022

作者： Khala, Mohamed Abouzid, Houda Teidj, Sara Eloutassi, Omar Messaoudi, Choukri Optoelectronics and Applied Energy Techniques Faculty of Science and Technology Moulay Ismail University of Meknes Meknes Morocco Computer Science and New Technology Trends Abdelmalek Essaadi University Tetouan Morocco Department of Physics Faculty of Science and Technology Moulay Ismail University of Meknes Meknes Morocco

ISBN: (纸本)9783031268519

The renewable energy market, like conventional energy, is often unstable. Solar energy in particular presents disturbances linked to the spatiotemporal fluctuations that solar radiation undergoes. To remedy this problem, it is essential to predict its fluctuations that have exhausting consequences for integration into the electricity network and reduce the dependence on fossil fuels essential for socio-economic development. The main objective of this study is to propose a prognostication model based on artificial intelligence to predict with great accuracy the fluctuations of global solar radiation (GSR). Indeed, we adopted a deep dynamic recurrent memory artificial neural network (ANN) model which can manipulate the dynamics of atmospheric factors and is capable to save the history of these characteristics. For this purpose, we developed two long-short term memory (LSTM) models for short and long term forecasting of global solar radiation time series. The first model is a monovariate LSTM, the second one is a multivariate LSTM, after selecting the input variables (predictors) by correlation study, the models are trained by dividing the data set into two subsections, the first subsection is used for model training and the second subsection is reserved for testing. The indices and results established in this work demonstrate the robustness attributed to our method which can provide power grid managers at Er-Rachidia, MOROCCO (Latitude: 31°55′53″N;Longitude: 4°25 ′35″ W;Altitude: 1039 m) credible predictions to ensure better supervision of the energy system and to adapt solar energy to the electricity production system, especially multivariate LSTM model which proved more accuracy compared to monovariate LSTM. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Forecasting

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Studies of Critical Phenomena in Causal Dynamical Triangulations on a Torus

arXiv

引用

arXiv 2023年

作者： Németh, Dániel Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Poland

This document contains my publications and results based on research done as a member of the Causal Dynamical Triangulations (CDT) group at the Jagiellonian University during my PhD studies. The field of my research was the four-dimensional CDT, which is a lattice regularization of the theory of quantum gravity, based on the formalism of Regge Calculus and Feynman path integrals. Due to mathematical complexity, analytical solutions to the model exists only in two dimensions. The four-dimensional theory is analyzed by numerical simulations. Earlier discoveries include dynamically emergent quantum de Sitter universes with emergent four-dimensional properties, scale-dependent spectral dimensions and a complex phase structure in which first- and higher-order phase transitions were shown to exist. The document describes the nature of previously not yet analyzed phase transitions, new ways to analyze triangulations and the impact of classical and dynamical (quantum) scalar fields in four-dimensional CDT with toroidal spatial topology. The main results of the dissertation are the six publications attached to the last chapter. This document is intended as an introduction to CDT and serves as a guide to the papers comprising the doctoral thesis. © 2023, CC BY.

关键词： Triangulation

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"To renormalize or not to renormalize ?" in the proton-deuteron scattering calculations

arXiv

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arXiv 2024年

作者： Witala, H. Golak, J. Skibiński, R. Smoluchowski, M. Institute of Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University KrakówPL-30059 Poland

We discuss two approaches which, by applying the screening method, permit one to include the long range proton-proton (pp) Coulomb force in proton-deuteron (pd) momentum-space scattering calculations. In the first one, based on Alt-Grassberger-Sandhas (AGS) equation, presented in Phys. Rev. C71, 054005 (2005) and 73, 057001 (2006), one needs to renormalize elastic scattering amplitude before calculating observables. In the second treatment, proposed by us in Eur. Phys. Journal A 41, 369 (2009), 41, 385 (2009), and arXiv:2310.03433 [***], this renormalization is avoided. For the proton induced deuteron breakup reaction both approaches require renormalization of the corresponding transition amplitudes. We derive the basic equations underlying both methods under the assumption that all contributing partial wave states are included and explain why in our approach renormalization of the elastic scattering amplitude is superfluous. We show that in order to take into account in the screening limit all partial waves it is required that four additional terms, based on the 3-dimensional and partial-wave projected pp Coulomb t-matrices, identical for both approaches, must appear in transition amplitudes. We investigate importance of these terms for elastic pd scattering below the breakup threshold. © 2024, CC BY.

关键词： Elastic scattering

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Gravitational wave resonance in ultralight dark matter halos

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Physical Review D 2023年第12期108卷 123539-123539页

作者： Paola C. M. Delgado Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University 30-348 Krakow Poland

Ultralight dark matter (ULDM) halos constituted by ultralight axions (ULAs) generate gravitational potentials that oscillate in time. In this paper, I show these potentials interact with gravitational waves, resonantly amplifying them. For all ULA masses considered, the resonance in the solar region is currently negligible, while in a denser dark matter environment, which may arise in different scenarios, it might become significant. The frequency of the amplified gravitational wave is equal to the ULA mass in the case of the first resonance band, which represents the most efficient scenario.

关键词： Gravitational waves Massive compact halo objects Particle dark matter

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Uncertainty Relations from State Polynomial Optimization

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Physical Review Letters 2024年第20期132卷 200202-200202页

作者： Moisés Bermejo Morán Felix Huber Faculty of Physics Astronomy and Applied Computer Science Institute of Theoretical Physics Jagiellonian University 30-348 Kraków Poland Bordeaux Computer Science Laboratory (LaBRI) University of Bordeaux 351 cours de la Liberation 33405 Talence France

Uncertainty relations are a fundamental feature of quantum mechanics. How can these relations be found systematically? Here, we develop a semidefinite programming hierarchy for additive uncertainty relations in the variances of noncommuting observables. Our hierarchy is built on the state polynomial optimization framework, also known as scalar extension. The hierarchy is complete in the sense that it converges to tight uncertainty relations. We improve upon upper bounds for all 1292 additive uncertainty relations on up to nine operators for which a tight bound is not known. The bounds are dimension-free and depend entirely on the algebraic relations among the operators. The techniques apply to a range of scenarios, including Pauli, Heisenberg-Weyl, and fermionic operators, and generalize to higher order moments and multiplicative uncertainty relations.

关键词： Quantum correlations in quantum information Quantum correlations, foundations & formalism Quantum foundations Quantum information theory Quantum measurements

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Reconstruction of Long-Lived Particles in LHCb CERN Project by Data Analysis and Computational Intelligence Methods 21st

Reconstruction of Long-Lived Particles in LHCb CERN Project ...

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21st International Conference on Computational science, ICCS 2021

作者： Golaszewski, Grzegorz Kulczycki, Piotr Szumlak, Tomasz Lukasik, Szymon Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Systems Research Institute Polish Academy of Sciences Warsaw Poland

ISBN: (纸本)9783030779603

LHCb at CERN, Geneva is a world-leading high energy physics experiment dedicated to searching for New physics phenomena. The experiment is undergoing a major upgrade and will rely entirely on a flexible software trigger to process the data in real-time. In this paper a novel approach to reconstructing (detecting) long-lived particles using a new pattern matching procedure is presented. A large simulated data sample is applied to build an initial track pattern by an unsupervised approach. The pattern is then updated and verified by real collision data. As a performance index, the difference between density estimated by nonparametric methods using experimental streaming data and the one based on theoretical premises is used. Fuzzy clustering methods are applied for a pattern size reduction. A final decision is made in a real-time regime with rigorous time boundaries. © 2021, Springer Nature Switzerland AG.

关键词： Pattern matching

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